United States Patent [191
`Yasumi
`
`[54] APERTURE SETTING DEVICE
`[75] Inventor: Masaoki Yasurni, Akigawa, Japan
`[73] Assignec: Japan Aviation Electronics Industry
`Limited, Tokyo, Japan
`[21] Appl. No; 361,649
`,
`[22] Flledz
`Mar. 25, 1982
`
`Related US. Application Data
`Division of Ser. No, 172,305, Jul. 25, 1980, abandoned.
`[62]
`'
`%'l3 """""""""""" " G018
`[2;]
`R 180 R’ 181 R
`Ed Fi‘el'd of‘
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`"""""" " 33/1316’ 7. 29 A51 753’
`'
`’
`’
`
`‘
`
`[56]
`
`References Cited
`U_S_ PATENT DOCUMENTS
`33 178 R
`l 576 346 3 ‘926 M d n
`"""""""""" " “i180 R
`l’878'296 92932 sci?nfdt
`2,638,676 5/1953 Callahan .......... ..
`33/18OR
`2,827,941 3/1958 Stoltz .......................... .. 29/753
`3,325,885 6/1967 Ziegler, Jr. et al. ................ .. 29/751
`
`[111
`[45]
`
`4,454,657
`Jun. 19, 1984
`
`3,859,728 l/l975 Shutt ............................... .. 33/180 R
`,04l,766
`1977 J h
`l. ..................... .. 29 7
`4
`8/
`o nson at a
`/ 53
`FOREIGN PATENT DOCUMENTS
`87474 l/l958 Netherlands
`i’rimary liicaminer-g‘Richagd 11:. itea/rnsd s
`ttorney, gent, or irm— 0 0c ,
`Priddy
`‘
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`an e ande &
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`33/] B
`
`ABSTRACT
`[57]
`PL" aperture 8min?‘ d?vicehf?r use in a drawing die, a
`c uck and so fort , in w ich at least three or more
`substantially triangular movable pieces are sequentially
`arranged in the form of a ring, an aperture is formed by
`one end portion of an inner side of each movable piece
`and the movable piece is movable along a side opposite
`its vertical angle on the side of the aperture, together
`with the other movable pieces. The movable pieces are
`disposed in a frame. By the movement of the movable
`pieces, the aperture can be varied in size without being
`changed "1 °°"?g“m"°"
`
`7 Claims, 18 Drawing Figures
`
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`Page 1 of 14
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`EDWARDS LIFESCIENCES EX. 1025
`Edwards Lifesciences v. Boston Scientific Scimed
`U.S. Patent No. 6,915,560
`
`

`
`U.S. Patent Jun. 19, 1984
`U.S. Patent
`Jun. 19, 1934
`
`Sheet 1 of?
`Sheet 1 of?
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`4,454,657
`4,454,657
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`07/05
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`17
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`H6. 2
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`U.S. Patent
`Jun. 19, 1984
`U.S. Patent Jun. 19, 1984
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`Sheet 2 of 7
`Sheet 2 of 7
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`4,454,657
`4,454,657
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`210
`20
`22-7 23-7
`18
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`Page 3 of 14
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`

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`U.S. Patent Jun. 19, 1984
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`Sheet 3 of 7
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`4,454,657
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`0
`FIG- 4(a)
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`@ FIG. 4(b)
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`FIG. 4(c)
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`Page 4 of 14
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`US. Patent Jun. 19, 1984
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`Sheet4 of7
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`4,454,657
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`U.S. Patent Jun. 19, 1984
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`Sheet 5 of?
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`4,454,657
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`0
`FIG. 6(a)
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`\
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`J
`FIG- 6(b)
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`FIG. 7(a)
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`FIG. 7(b)
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`Page 6 of 14
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`U.S. Patent Jun. 19, 1984
`U.S. Patent
`Jun. 19, 1984
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`Sheet 6 of7
`Sheet 6 of7
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`4,454,657
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`U.S. Patent
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`Jun. 19, 1984
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`Sheet 7 of7
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`4,454,657
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`

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`1
`
`APERTURE SE'I'I'ING DEVICE
`
`This is a division of application Ser. No. 172,305, filed
`July 25, 1980, now abandoned.
`
`BACKGROUND OF THE INVENTION
`The present invention relates to an aperture setting
`device applicable, for example, to a drawing die, a
`chuck and so forth, and more particularly to an aperture
`setting device in which the size of a predetermined
`polygonal aperture can be changed, retaining the polyg
`onal con?guration.
`Heretofore, there has been employed a guide device
`of a conical, unitary structure for guiding an electric
`wire or the like to a predetermined position.- In the prior
`art, since it is difficult to change the size of the conical
`structure without introducing a gap between adjacent
`elements forming the conical structure, use is made of a
`guide device of a size corresponding to the thickness of
`each electric wire or the like to be guided. Also there
`has been employed a chuck of the type clamping an
`article with three or four clicks. In the conventional
`chuck of this kind, the article to be clamped may get
`between the clicks according to the size of the article,
`sometimes resulting in a state in which the axis of the
`chuck is not in agreement with the axis of the article.
`Accordingly, for example, machining of the article
`cannot immediately be carried out on the basis of the
`axis of the chuck in some cases.
`In the past, there has not been put to practical use a
`device which is capable of changing with a simple ar
`rangement, a polygonal aperture into various sizes con
`tinuously or stepwise, retaining it on the same axis. Such
`a device, if realized, would be of great ability when
`employed in such devices as a chuck, a press tool, an
`electric wire guide device, a drawing die, a control
`valve and so forth.
`It is an object of the present invention to provide an
`aperture setting device which is capable of easily chang
`ing the size of a predetermined polygonal aperture with
`a simple arrangement.
`
`4,454,657
`2
`FIG. 3 is a plan view illustrating the arrangement of
`an embodiment of the aperture setting device of the
`present invention;
`FIG. 4(a) is a perspective view showing how mov
`able pieces are assembled together to provide a conical
`aperture setting portion in the aperture setting device of
`the present invention;
`FIG. 4(b) is a plan view of the aperture setting por
`tion in FIG. 4(a);
`FIG. 4(a) is an exploded perspective view showing
`the individual movable pieces in FIG. 4(a);
`FIG. 5(a) is a perspective view showing how mov
`able pieces are assembled together to provide a qua
`drangular pyramidal aperture setting portion in the
`aperture setting device of the present invention;
`FIG. 5(b) is a plan view of the aperture setting por
`tion in FIG. 5(a);
`FIG. 5(c) is an exploded perspective view showing
`the individual movable pieces in FIG. 5(a);
`FIG. 6(a) is a perspective view showing the state in
`which the aperture of the aperture setting portion is
`opened in FIG. 4(a);
`FIG. 6(b) is a plan view of the aperture setting por~
`tion in the state of FIG. 6(a);
`'
`FIG. 7(a) is a perspective view showing the state in
`which the aperture of the aperture setting portion is
`opened in FIG. 5(a);
`FIG. 7(b) is a plan view of the aperture setting por
`tion in the state of FIG. 7(a);
`FIG. 8 is an exploded perspective view illustrating
`the construction of a manual forming and pressing tool
`embodying the present invention;
`FIG. 9(a) is a sectional view illustrating an electric
`wire guide device embodying the present invention;
`FIG. 9(b) is a sectional view taken on the lines AA’
`and BB’ in FIG. 9(a);
`FIG. 9(a) is a sectional view taken on the lines CC’
`and DD‘ in FIG. 9(a); and
`FIG. 10 is a sectional view taken on the line XX‘ in
`FIG. 3.
`
`0
`
`35
`
`45
`
`SUMMARY OF THE INVENTION
`In the aperture setting device of the present inven
`tion, use is made of a plurality of movable pieces each of
`which has a triangular section in a plane which includes
`an aperture and perpendicular to the axis thereof. When
`50
`the vertices of the triangles of the movable pieces are
`brought into agreement with the aperture axis, the sum
`of the vertical angles of the triangles with respect to the
`vertices is 360°. The con?gurations of the movable
`pieces are selected so that, in the abovesaid state, a
`polygonal aperture is de?ned by the sides opposite the
`vertical angles of the triangles of the movable pieces.
`Drive means is provided for moving the movable pieces
`along the abovesaid opposite sides in the plane includ
`ing the aperture.
`
`55
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`FIG. 1 is a diagram showing the general principles of
`the aperture setting device of the present invention;
`FIG. 2 is a diagram showing the principles of the
`aperture setting device of the present invention in the
`case of using movable pieces of the same isosceles tri
`angular con?guration;
`
`65
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENTS
`Referring ?rst to FIG. 1, the illustrated embodiment
`of the present invention is arranged so that an aperture
`11 to be set (hereinafter referred to as the aperture) is
`de?ned by ?ve movable triangular pieces 12 to 16. In
`this case, the movable piece 13 is disposed with one side
`1130 of its triangle held partly in agreement with one side
`12a of the movable piece 12 forming one side of the
`pentagonal aperture area 11 but with one end of the
`piece 13 displaced outwardly relative to the area 11.
`The movable piece 14 is disposed so that its one side 14a
`partly lies along one side 13b forming one side of the
`area 11 but projects outwardly relative to the area 11.
`The other movable pieces are also likewise disposed one
`after another, and the movable piece 16 is disposed so
`that its one side 16a forming one side of the area 11 is in
`contact with one side 12b of the movable piece 12.
`The movable pieces 12, 13, I4, 15 and 16 are arranged
`so that they are respectively movable, in a pla?inqud
`ing the _aperture 11, only along opposite sides AB1, BC1,
`CTD], DE; and EA1 to their vertical angles [31, B2, B3,
`B4 and B5 on the side of the aperture 11. These sides will
`hereinafter be referred to as bases. At extreme positions
`of the movable pieces 12 to 16 where they have been
`moved respectively along their bases to bring their
`vertices 01, 01, 03, 04 and 05 to the center of the aperture
`
`Page 9 of 14
`
`

`
`4
`
`sinag
`sinal
`
`sina4
`' sinag
`
`sinazn
`
`' sinazn _ 1
`
`where i=1, 2, .
`
`.
`
`. n, and
`
`2B,-=360'
`
`(3)
`
`(10)
`
`4,454,657
`3
`11, that is, its axis 0, the vertices 0|, 0;, 03, 04 and 05 of
`the triangular movable pieces 12 to 16 coincide with the
`aperture axis 0. In this state, each end of the base of each
`of the ?ve movable pieces 12 to 16 meets one end of the
`base of each of the adjoining movable pieces and their
`bases form a pentagon AOBOCODQEO. The sum of the
`vertical angles of the vertices 01 to 05 is 360’ and the
`aperture 11 is completely covered by the movable
`pieces 12 to 16.
`In the following description the triangular ?gures in
`the plane including the aperture 11 will be referred to as
`movable pieces unless otherwise speci?ed. Let it be
`assumed that if one end A of the base of the movable
`part 12 is movable along the base from Aoby a distance
`d1, then one end B of the base of the movable piece 13,
`one end C of the base of the movable piece 14, one end
`D of the base of the movable piece 15 and one end B of
`the base of the movable piece 16 are respectively mov
`able along the bases from B0, C0, Doand Eoby distances
`d1, d3, d4and d5. By moving the movable pieces 12 to 16
`in the above way, it is possible to change the aperture
`into similar ?gures of various sizes.
`Letting the base angles of the movable pieces 12 to 16
`be represented by a. [(12, c.3014, 015%, (170.3 and again,
`respectively, as shown in FIG. 1, the following expres
`sions hold between these base angles and the distances
`61, d2, d3. d4 and ds=
`
`where i=1, 2, . . . n.
`As is apparent from the aforesaid expressions (1) to
`(4), once the amount of movement of one movable piece
`along its base, for example, d‘, is determined by setting
`the angles of the respective triangular movable pieces,
`the amounts of movement of the other movable pieces
`dz, d3, . . . d” are determined accordingly. Now, a dis
`cussion will be given of the degree of freedom in the
`determination of the respective angles.
`As will be appreciated from the expressions (8), (9)
`and (10), in the case of forming an n-gonal aperture, the
`number of angles a; . . . a2”, [3| . .
`. B, which de?ne the
`con?guration of each movable piece is 3n and, as condi
`tional expressions, the expression (8) is l, the expression
`(9) is n and the expression (10) is 1; namely, a total of
`n+2 expressions exist. Accordingly, the degree of free
`dom in the selection of angles in this case is
`3n—(n+2)=2(n—1).
`The relationship of the con?guration and area of the
`aperture 11 thus obtained to the con?guration and area
`of the polygon which is obtained by bringing the verti
`ces of the plurality of movable pieces forming the aper
`ture 11 into agreement with the axis 0 is extremely
`complicated in the case of an ordinary polygon and
`lacks generality in terms of analysis; hence, this relation
`ship will hereinbelow be described in connection with a
`regular triangle.
`FIG. 2 illustrates an arragnement wherein the poly
`gon formed by bringing the vertices of respective tri
`angular movable pieces into agreement with the axis 0 is
`a regular polygon; in this case, each movable piece is a
`congruent triangle. Further, there is shown a state in
`which a regular polygonal aperture 11 is formed by
`moving movable pieces 12, 13, 14, . . . 18 and 19 forming
`the abovesaid positions thereof along their bases respec
`tively by an equal predetermined distance d(=A
`oA2=BoB2=COCz- ' - =GOG2=HoH2)
`In FIG. 2, in the case of the movable piece 12, since
`AA0B00§AA2B10, A201=A00, and since the movable
`pieces 12 has been mov?long its_base A2131, A201
`//A00, it follows that A0A2=d=001. From similar
`considerations of each of the movable pieces 13, 14, 15,
`1_6, ll 1_8_ and 1_9,_ it_wil_ be evident that
`002 =003 =004 = 005 =006= 007 = 003 = d. Accordingly,
`it is seen that an octagon 00203040506070; formed by the
`aperture 11 is a regular octagon inscribed in a circle
`with a radius d. That is, by moving the movable pieces
`12 to 19 along their bases, it is possible to change the
`size of the aperture 11 while holding the regular octa
`gon. The embodiment of FIG. 2 shows the case where
`the individual movable pieces gather about the axis 0 to
`de?ne the regular octagon; but it will easily be under
`stood that the structure of this embodiment can gener
`ally be applied to regular polygonal apertures.
`In general, if the radius of the circle in which is in
`scribed the original regular n-gon formed by n isosceles
`triangular movable pieces with their vertices in agree
`ment with the axis 0 is taken as R, and if the vertical
`
`25
`
`sine;
`"'1 ~ sir,- ' "I
`
`sina4
`d
`3" 811105
`
`d
`sinaz
`sina4
`d
`' 2- srnag ' sine; "
`
`sinuz
`sine-4
`sinus
`d‘ = _—. . _ ,_F_. . d,
`s1na1
`smug
`s|na3
`
`sine;
`sincu
`sinag
`sinag
`d5=.—.—p—-.-q—.—|—.dl
`51110.9
`nna7
`Sll’ldj
`slna3
`
`Further, since
`
`sinal
`‘5 = m "11
`
`sinus
`sina4
`sina;
`sina; ' ‘smug ' sinag,
`
`sinaw
`sinag
`' sina7 ' iinag
`
`(1)
`
`(2)
`
`(3)
`
`(4)
`
`35
`
`45
`
`(5)
`
`Letting the vertical angles be represented by B1, B2, B3,
`B4 and [35, respectively, the following expressions hold:
`
`50
`
`where i=1, 2, . . . 5, and
`
`2B,: 360‘
`
`(7)
`
`where i=1, 2, . . . 5.
`In the structure of FIG. 1, it is necessary to satisfy the
`conditions (5), (6) and (7). The embodiment of FIG. 1
`has been described in connection with the case where
`the outer periphery formed by the bases of the five
`movable pieces is pentagonal when their vertices have
`been brought into agreement with the axis 0, but this is
`also applicable to the case where the abovesaid outer
`periphery is polygonal, and the general conditional
`expressions become as follows:
`
`65
`
`Page 10 of 14
`
`

`
`S = nRzsin 2 cos i - = nRzsin 1'- cos-1Z
`2
`2
`n
`n
`
`(ll)
`
`where n=3, 4, 5 . . . .
`As discussed above, the area s of the aperture de?ned
`around the axis 0 is given by the following expression:
`
`(12)
`
`Accordingly, the area ratio between the regular n-gon
`de?ned by the movable pieces around the axis 0 and a
`regular n-gon forming a similar aperture is given by the
`following expression:
`
`20
`
`4,454,657
`5
`.
`6
`tively inserted in the elongated holes 23-1 to 23-8. Turn
`angle formed by the isosceles of each movable piece is
`ing the guide base 21 about the axis 0 clockwise in FIG.
`taken as (b, then the area S of a regular n-gon formed by
`the n isosceles triangular movable pieces with their
`3 relative to the frame 20, the drive pins 22-1 to 22-8
`vertices lying in agreement with the axis 0 is given by
`move on the same circle about the axis 0 relative to the
`the following expression:
`frame 20. The drive pins 22-1 to 22-8 drive the movable
`pieces 12 to 19 through the elongated holes 23-1 to 23-8,
`respectively, by which the movable pieces are moved
`along their bases to approach the axis 0. In this driving,
`the vertical distance between each drive pin and the
`base of the movable piece corresponding thereto varies,
`but this variation is absorbed by the relative movement
`in the elongated hole of the movable piece in its length
`wise direction.
`Accordingly, with the aperture setting device of
`FIG. 3 in which the aperture 11 is regular polygonal,
`the aperture can easily be varied into similar ?gures
`with a desired area ratio by presetting the correspon
`dence between the aforementioned movement (I and the
`rotational angle 0 of the guide base 21.
`If necessary, on the guide base 21 is formed integrally
`therewith a ring-shaped guide projection 21a adjacent
`the outer peripheral surface of the frame 20; a ring
`shaped groove 24 is cut in the outer peripheral surface
`of the frame 20 to extend along the peripheral surface
`thereof; and a ring-shaped projection 25 ?tted in the
`ring-shaped groove 24 is formed integrally with the
`inner peripheral surface of the ring-shaped guide pro
`jection 21a. This prevents the frame 20 from getting out
`of the guide base 21.
`In the above description, the con?gurations of the
`movable pieces 12 to 19 are con?gurations in the plane
`perpendicular to the axis 0, as referred to previously.
`The plane in which each side of each movable piece
`extends along the axis 0, that is, the inner peripheral
`surface of the aperture, need not always be parallel with
`the axis 0. Further, the cross-sectional shape of the
`movable piece is not necessarily always triangular but
`may vary at different positions along the axis 0. Next, a
`description will be given of movable pieces of various
`different con?gurations. FIGS. 4, 5, 6 and 7 show vari
`ous modi?ed forms of the movable piece, and it will be
`apparent that various other modifications are possible.
`In FIGS. 4 and 6, the aperture setting portion is made
`truncated-conical about the axis 0. FIG. 4(a) shows the
`state in which the aperture is closed by gathering mov
`able pieces around the axis 0 and FIG. 6(a) the state in
`which the aperture is opened. In FIGS. 5 and 7, the
`aperture setting portion is made quadrangular-pyra
`midal. FIG. 5(a) shows the state in which the aperture
`is closed and FIG. 7(a) the state in which the aperture is
`opened.
`In the embodiment of FIG. 4, as shown in FIG. 4(a),
`movable pieces 12 to 15 are disposed around the axis 0,
`the bottom of each movable piece is triangular and the
`movable piece is adapted to be movable along the tri
`angular base. When the movable pieces 12 to 15 are
`gathered around the axis 0, the inner peripheral surface
`forms a truncated cone with its vertex at the axis 0. The
`dimensions of the truncated cone, that is, the areas of its
`base and top vary with the movement of the movable
`pieces 12 to 15 along their triangular bases. The shape of
`the aperture setting portion, as viewed from the direc
`tion of the axis 0, is circular, as depicted in FIG. 4(b),
`and the con?gurations of the movable pieces 12 to 15
`are such as shown in FIG. 4(c). That is, as shown in
`FIG. 4(a), the tops of the movable pieces 12 to 15 are
`formed to provide a square identical with the square
`
`Accordingly, for the formation of regular n-gonal
`apertures such that the value of the radius r of the circle
`in which each aperture is inscribed ranges from ri to
`r1(r1> n) it is evident that it is sufficient to set
`ADAZ=BOBZ. .
`. GOGZ=HUHZ in FIG. 2 so that rz/cos
`(#/n) may be included in a maximum value of the
`amount of movement of each moveable piece along its
`base. In the case of obtaining a similar ?gure of a desired
`area ratio given by the expression (13), it is sufficient
`that R given by the length of equal sides of each mov
`able piece and the amount of movement d of the mov
`able piece along its base are set to predetermined values
`that satisfy the expression (13).
`FIG. 3 and FIG. 10 embody the principles of the
`aperture setting device of the present invention and
`depict the state in which movable pieces 12, 13, 14, .
`. .
`19 around the axis 0 have respectively been moved
`along their bases by the aforesaid maximum distance d.
`In this state, the movable pieces 12 to 19 are disposed in
`a circular frame 20. The inner peripheral con?guration
`of the frame 20 conforms substantially to a windmill
`like outer peripheral con?guration formed by the mov
`able pieces 12 to 19 as a whole. The movable pieces 12
`to 19 are each arranged to be movable to the base
`thereof in the frame 20 under such a condition as men
`tioned above. As occasion demands, a guide groove 39
`is cut in the inner peripheral surface of the frame 20 to
`extend in its circumferential direction, and an elongated
`projection 40 which is movable along the guide groove
`55
`39 is formed as a unitary structure with each movable
`piece. This prevents the movable pieces 12 to 19, when
`moved, from getting out of the frame 20. As drive
`means, a guide base 21 is provided, on which the mov
`able pieces 12 to 19 and the frame 21 are mounted. The
`arrangement is such that, by turning the frame 20 and
`the guide base 21 about the axis 0 relative to each other,
`the area of the aperture 11 can be set to a desired value.
`For example, (n=8) drive pins 22-1, 22-2, .
`.
`. 22-7 and
`22-8 are planted on the guide base 21 at regular intervals
`on the same circle about the axis 0. The movable pieces
`12 to 19 respectively have cut therein elongated holes
`23-1 to 23-8 to extend substantially perpendicularly to
`their bases, and the drive pins 22-1 to 22-8 are respec
`
`i.
`S
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`2
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`(i)
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`(13)
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`25
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`30
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`35
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`45
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`outer periphery which is formed by gathering the tri
`angular bottoms of the movable pieces around the axis
`0 to close the aperture, but those of side walls of the
`movable pieces which form the inner peripheral surface
`of the aperture setting portion are inclined so that they
`form the truncated cone with its vertex at the axis 0.
`Accordingly, when the aperture is closed, as depicted in
`FIG. 4(a), the aperture setting portion is conical, as
`shown in FIG. 4(b); and, when the aperture is opened,
`the aperture setting portion is truncated-conical. The
`inclined side wall of each movable piece is extended on
`the same plane to form a slide surface for the adjoining
`movable piece.
`The embodiment of FIG. 5 is constructed so that in
`the state of the aperture is closed, the aperture setting
`portion de?ned by the movable pieces 12 to 15 forms a
`quadrangular pyramid about the axis 0, as shown in
`FIG. 5(a). In this case, the con?guration of the aperture
`setting portion, as viewed from the direction of the
`arrow C in FIG. 5(a), that is, from the side of the open
`ing end of the aperture setting portion, is square, as
`shown in FIG. 5(b), and the movable pieces 12 to 15
`respectively have the con?gurations illustrated in FIG.
`5(a) in which their bottoms are triangular and their tops
`parallel to the bottoms are quadrangular. Accordingly,
`when the aperture is closed, as shown in FIG. 5(a), the
`aperture setting portion forms a quadrangular pyramid
`as depicted in FIGS. 5(a) and 5(b), whereas when the
`aperture is opened as shown in FIG. 7(a), the aperture
`setting portion forms a truncated quadrangular
`pyramid, as illustrated in FIGS. 7(a) and 7(b).
`FIG. 8 is an exploded diagram illustrating an embodi
`ment of the aperture setting device of the present inven
`tion as used in a manual forming and pressing tool. A
`35
`description will be given of how respective parts shown
`are assembled into the manual forming and pressing
`tool.
`A ?xed handle 26 is composed of a pair of parallel
`spatular side plates 27-1 and 27-2 coupled together by
`coupling pieces, each formed one one part of the mar
`ginal edge of each side plate in its lengthwise direction.
`The side plates 27-1 and 27-2 are wide at one end por
`tion and narrow at the other end portion, and the wide
`end portions have centrally disposed circular holes 28-1
`45
`and 28-2 of the same diameter. A wide end portion of a
`movable handle 37 has formed integrally therewith, at
`the center thereof, the frame 20 described previously in
`respect of FIG. 3 and FIG. 10, and in the frame 20 are
`mounted movable pieces 12 to 16 and 17 in a manner to
`be movable along their bases by a predetermined dis
`tance, as indicated by the arrows D. As described previ
`ously, it is also posssible to adopt an arrangement in
`which a guide groove 39 is cut in the inner peripheral
`surface of the frame and a projection 40 for engagement
`with the guide groove 39 is formed on the surface of
`each movable piece on the side of its base. The frame 20
`having thus mounted therein the plurality of movable
`pieces 12 to 17 is interposed between the wide end
`portions of the two side plates 27-1 and 27-2 of the ?xed
`handle 26, and a narrow grip of the movable handle 37
`formed at the other end portion thereof and a grip of the
`?xed handle 26 are placed opposite each other. The
`movable handle 37 and the ?xed handle 26 are designed
`so that they can turn about the axis of the frame 20
`relative to each other, and the movable pieces 12 to 17
`are moved by the relative rotational movement of the
`handles 37 and 26.
`
`8
`To this end, a support disc 42 is ?tted into the circular
`hole 28-2 of the side plate 27-2 of the ?xed handle 26,
`and a ?ange 70 formed integrally with the peripheral
`surface of the support disc 42 serving as a driving mem
`ber is urged against the outside of the side plate 27-2.
`The frame 20 has formed therein on the side of the side
`plate 27-2 a circular recess coaxial with the frame 20,
`though not shown in FIG. 8, and the support disc 42 is
`?tted into this circular recess.
`A setting piece 32 for setting the opening of the aper
`ture is interposed between the frame 20 and the side
`plate 27-1. Circular projections 33-1 and 33-2 coaxial
`with the frame 20 are formed integrally with the setting
`piece 32 on both sides thereof. In FIG. 8, the circular
`projection 33-2 is behind the setting piece 32 and hence
`is not illustrated. A circular recess 38, which is coaxial
`with the frame 20, is formed in the frame 20 in opposing
`relation to the setting piece 32, and the circular projec
`tion 33-2 is ?tted into the circular recess 38. The circu
`lar projection 33-1 is ?tted into the circular hole 28-1 of
`the side plate 27-1. A sleeve 34 is formed integrally with
`the circular projection 33-1 at the position of its axis.
`A support disc 41 larger than the circular hole 28-1 is
`placed on the outside of the side plate 27-1 to cover the
`hole 28-1. The support disc 41, used as a driving mem
`ber, has formed centrally thereof a hole 43, into which
`the sleeve 34 of the setting piece 32 is inserted. The
`setting piece 32 and the support discs 41 and 42 respec
`tively has formed therethrough small holes 36-11 to
`36-16, 36-21 to 36-26 and 36-31 to 36-36 corresponding
`to the elongated holes 23-1 to 23-6 of the movable
`pieces 12-16. Drive pins 45 are individually inserted into
`corresponding ones of the abovesaid small holes and the
`elongated holes from the outside of the support disc 42.
`The pins 45 have each formed integrally therewith a
`?ange surrounding the outer end face to serve as a
`stopper, and the inner end face of each pin 45 has
`formed therein a threaded hole. A screw 46 is screwed
`into the threaded hole of each pin 45 from the outside of
`the support disc 41 through the abovesaid small holes
`and the elongated hole.
`In this way, the ?xed handle 26, the movable handle
`37 and the setting pice 32 are coupled together, but the
`movable handle 37 is rotatable relative to the ?xed
`handle 26. Bringing the grips of the ?xed handle 26 and
`the movable handle 27 close to each other, the setting
`piece 32 also turns but butts against the ?xed handle 26
`when a set angle is reached, and further rotational
`movement of the setting piece 32 is limited, and conse
`quently the pins 45 are ?xed. Bringing the grips of the
`handles 26 and 37 closer to each other, the pins 45 move
`in the elongated holes 23-1 to 23-6 to move the movable
`pieces 12 to 17 in the frame 20, reducing the aperture
`de?ned by the movable pieces 12 to 17.
`Furthermore, this embodiment is designed so that the
`aperture can be set at a plurality of stages. To perform
`this, an adjust disc 30 having a knob 29 is mounted on
`the outside of the side plate 27-1 substantially centrally
`thereof. The shaft of the adjust disc 30 is inserted into a
`hole made in the side plate 27-1 and its projecting end
`has mounted thereon and adjust cam 31. The marginal
`portion of the setting piece 32 on the side of the cou
`pling pieces of the side plates 27-1 and 27-2 confronts
`the cam surface formed in the peripheral surface of the
`adjust cam 31. The knob 29 is arranged to be rotatable
`for switching to a plurality of stages, and the cam 31 is
`formed so that the distance between the cam surface of
`the adjust cam 31 confronting the setting piece 32 and
`
`60
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`65
`
`50
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`55
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`the shaft of the adjust cam 31 changes with the switch
`substantially in alignment with the centers of the open
`ing position set up by the knob 29.
`ings 54 and 55 of the side panels of the casing. Further,
`The angle between the setting piece 32 and the ?xed
`the guide bases 21-1 and 21-2 respectively have cen
`handle 26 does not become smaller than the angle there
`trally disposed through holes 58-1 and 58-2 which are
`between when the setting piece 32 butts against the cam
`substantially aligned with the openings 54 and 55, re
`spectively.
`31, and at that angle the rotational movement of the
`setting piece 32 is stopped. A minimum angle between
`The aperture setting device of this embodiment is
`the ?xed handle 26 and the setting piece 32 can be a1
`designed so that the sizes of both aperture setting por
`tered by the set position of the adjust disc 30. Since the
`tions can be controlled concurrently by turning the
`opening of the aperture is determined by the amount by
`guide bases 21-1 and 21-2 relative to the frames 20-1 and
`which the movable handle 37 can be turned closer to
`20-2 at the same time. For example, the side panels 59-1
`the ?xed handle 26 from the position where the setting
`and 59-2 are each connected at their marginal portions
`piece 32 has been halted, as described previously, the
`except one side thereof to a U-shaped coupling member
`opening of the aperture can be set by the set position of
`56 and ?xedly secured thereto as by screws 71-1 to 71-4.
`the adjust disc 30.
`Consequently, there is formed a casing in which the
`Accordingly, a hole 35 is made in the sleeve 34 which
`coupling member 56 has an open end downwardly in
`is inserted into the hole of the support disc 41 and the
`FIG. 9(a). Support pins 60-1 to 604 which pass through
`hole 35 is formed to extend through the setting piece 32
`the side panels 59-1, the guide base 21-1, the frames
`and, further, a hole 44 is also formed in the support disc
`20-1, 20-2 and 21-2 and the side panel 59-2 in this order
`42 to extend therethrough in alignment with the hole
`are provided about the aperture at equiangular inter
`35. In the state in which the handles 26 and 27 have been
`vals. The support pins 60-1 to 604 are each reduced in
`drawn away from each other to open the aperture, a
`diameter at both ends thereof to form stepped portions.
`The length of each support pin between the stepped
`linear member to be formed, such as an electric wire or
`the like, is inserted into the hole 35 of the sleeve 34. In
`portions limits the distance between the two side panels
`this case, the knob 29 of the adjust disc 30 is preset to a
`59-1 and 59-2 to de?ne a space large enough for the
`predetermined position. Next, the movable handle 37 is
`guide bases 21-1 and 21-2 to rotate in the casing. The
`turned to reduce the angle between it and the ?xed
`support pins 60-1 to 60-4, the side panels 59-1 and 59-2
`handle 26, butting the setting piece 32 against the