JP2007307633A - Clamping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact clamp device capable of easily transferring an object while keeping a phase of an annulus constituting a laminate. <P>SOLUTION: Positioning pins 76 of fixing pawls 42a-42c locked to a guide groove 60 are inserted in arc-like long holes 94a-94c of a cam board 48, and guided pins 88 of movable pawls 44a-44c are inserted in cam grooves 96a-96c swung to approach to an outer end from a center side of the cam board 48. When the cam board 48 is rotated, the movable pawls 44a-44c approach to or are separated from stationary pawls 42a-42c along a guide groove 60 accompanied with the movement of the cam board 48 to the end side and the center side by guiding the guided pins 88 in the cam grooves 96a-96c, thereby opening and closing the clamp part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a clamping device for clamping a workpiece having a through hole from the inner wall side and the outer wall side of the through hole.

  A multi-plate clutch is widely known as a kind of clutch attached between an engine such as an internal combustion engine and a transmission. The multi-plate clutch has a laminated body in which various annular plates such as a driven plate and a retaining plate are laminated with each other (see, for example, Patent Document 1). This laminated body functions as a clutch plate.

  Here, a plurality of convex portions are formed on the outer peripheral wall of the driven plate so as to protrude outward in the diameter direction. On the other hand, on the inner peripheral wall of the retaining plate, a plurality of protrusions are formed protruding inward in the diametrical direction. When providing a laminate, it is necessary to arrange these protrusions at predetermined positions. There is. In other words, when producing a laminate, the annular plates must be phased.

  Then, the laminate formed in this way is conveyed so as not to cause a phase shift, and the clutch of the driven plate is engaged with the engaging portion provided on the inner peripheral wall of the clutch drum. By accommodating in the drum, a multi-plate clutch is configured. As this type of conveying apparatus, an assembling apparatus described in Patent Document 2 is exemplified.

JP-A 61-127924 Japanese Patent Application Laid-Open No. 64-30928

  The assembling apparatus described in Patent Document 2 is configured by attaching plate assembling means to the tip of an arm part of an articulated robot. That is, the articulated robot grips the transferred laminated body, conveys it to the clutch drum flowing on the conveyor belt, and then operates to accommodate the laminated body in the clutch drum.

  However, the articulated robot generally has a large shape and a large operation range. For this reason, a wide work space is required, and other equipment arrangements are restricted. That is, when the assembling apparatus described in Patent Document 2 is adopted, there is a disadvantage that the degree of freedom in layout of the device arrangement becomes small.

  The present invention has been made in order to solve the above-described problem, and it is possible to satisfactorily clamp a work provided with a through-hole while having a small shape, and the work is a stack of toroids. When it is a body, it aims at providing the clamp apparatus which can be conveyed, maintaining the phase of this torus.

In order to achieve the above object, the present invention provides a clamping device for clamping a workpiece having a through hole from the inner wall side and the outer wall side of the through hole,
At least two first claws for supporting the workpiece from the outer wall side;
An inner wall supporting portion that supports the workpiece from the inner wall side; and a guided member that protrudes to the other end side of the inner wall supporting portion, and is at least separated or accessible with respect to the first claw. Two second nails,
A bracket board provided with a guide groove extending from the outer end portion toward the central portion and slidably locked to the second claw, and provided with the first claw;
A cam groove that is pivoted so as to approach the outer end side from the center side and through which the guided member is passed, and is provided on the bracket board;
A housing panel that can house the cam panel in a slidable manner and that is coupled to the bracket board;
Rotating means provided on one end surface of the cam panel and exposed from the storage panel, and for rotating the cam panel relative to the bracket panel and the storage panel;
Comprising
When the cam plate rotates with respect to the bracket disc and the receiving disc by energizing the rotating means, the guided member is guided to the cam groove of the cam disc, so that the bracket disc is As the guide groove is reciprocated, each of the second claws approaches or separates from each of the first claws.

  In this clamp device, the first claw and the second claw function as a clamp portion. That is, when the second claw approaches the first claw, the clamp portion is closed, and at least two parts of the work are gripped by the first claw and the second claw. The first claw supports the workpiece from the outer wall side, while the second claw is displaced to the first claw side after being inserted into the through hole of the workpiece, whereby the workpiece is moved from the inner wall side of the through hole. To support.

  As a result, the work is firmly held by the first and second claws. Therefore, even if the workpiece is a laminated body such as an annular plate, it is possible to avoid the occurrence of phase shift.

  Further, when the second claw is separated from the first claw, the clamp portion is opened and the workpiece is released.

  As described above, the clamp part is opened and closed by reciprocating the second claw along the guide groove of the bracket board by rotating the cam board.

  In this way, in the present invention, the cam plate is rotated to move the second claw apart and approach the first claw, thereby opening and closing the clamp portion. That is, the clamp part can be opened and closed with a simple configuration. For this reason, an apparatus can be comprised compactly. Therefore, the degree of freedom in device layout is greatly improved.

  In addition, while providing a long hole curved in an arc shape in the receiving board, the cam board is provided with the rotation means at a position corresponding to the position of the long hole, and the rotation means is protruded from the long hole. Is preferred. In this case, since the rotating means is guided in the elongated hole, it is possible to avoid the displacement of the center of rotation of the cam panel and the second claw from being displaced by a predetermined amount.

  It is preferable to provide three first nails and two second nails. In this case, it is preferable that the first claws are arranged at the apex positions of the equilateral triangles, and the second claws are arranged at the apex positions of the equilateral triangles. In this case, since the workpiece can be gripped from three locations with substantially equal force, the workpiece is clamped more reliably.

  Moreover, it is preferable to provide a suspension member latching | locking part in the center part of an accommodating board. This is because the entire clamping device can be lifted and lowered mechanically by the suspension member, so that the working efficiency is further improved.

  Furthermore, it is preferable that the second claw be provided with an end surface support portion that is bent at the tip of the inner wall support portion and extends toward the first claw side and supports one end surface of the workpiece. Thereby, since a workpiece | work is supported from an end surface side, it can avoid that a workpiece | work falls from a clamp apparatus.

  Here, the first claw may be a fixed claw that is not displaced, or may be a movable claw that can approach or be separated from the second claw. When it is a movable nail | claw, what is necessary is just to set so that a 1st nail | claw and a 2nd nail | claw may be displaced in the direction which mutually approaches, or the direction which mutually spaces apart.

  A preferred example of the workpiece is a laminate in which a plurality of annular plates are laminated together. As described above, the clamp device according to the present invention can grip this type of laminated body so that the phase shift of the annular plate does not occur. Of course, the workpiece may be, for example, an annular member or a rectangular member.

  And as a suitable example of a laminated body, the clutch board which comprises a multi-plate clutch can be mentioned.

  In the present invention, by rotating the cam panel, the clamp part opens and closes by separating and approaching the second claw out of the first claw and the second claw functioning as the clamp part. It is configured as follows. In other words, the clamp part can be opened and closed with a simple configuration. For this reason, according to this invention, an apparatus can be comprised compactly, As a result, the freedom degree of the layout of the various apparatuses which operate the operation | work which accommodates a clutch board in a clutch drum, for example is improved greatly.

  In addition, in the present invention, since at least two portions of the work are firmly held by the first and second claws, even if the work is a laminated body such as an annular plate, a phase shift hardly occurs. Therefore, for example, even when the laminate is conveyed while being gripped, it is possible to easily avoid a phase shift.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a clamping device according to the present invention will be described and described in detail with reference to the accompanying drawings.

  First, the work clamped by the clamping device will be described.

  FIG. 1 is a schematic overall perspective view of a laminate 10 that is a workpiece. This laminated body 10 is accommodated in a clutch drum described later to constitute a multi-plate clutch. That is, the laminate 10 is a clutch plate in a multi-plate clutch.

  This laminated body 10 is formed including a driven plate 12 shown in FIG. 2 and a retaining plate 14 shown in FIG. As can be understood from FIGS. 1 to 3, the driven plate 12 and the retaining plate 14 are annular plates in which through holes 16 and 18 are provided in the respective central portions.

  Among these, a plurality of convex portions 20 are formed on the outer peripheral wall of the driven plate 12 so as to protrude outward in the diameter direction. Two of the convex portions 20 are provided close to each other to form a convex portion pair 22. For this reason, a concave portion 24 is provided between the convex portions 20, 20 forming the convex portion pair 22. Yes.

  Further, the interval between the convex portion pairs 22 is set to be larger than the interval between the convex portions 20 and 20 forming the convex portion pair 22. That is, the convex portion pair 22 is provided intermittently.

  On the other hand, the retaining plate 14 is formed with a plurality of convex portions 26 projecting inward in the diametrical direction, and the adjacent convex portions 26 and 26 are separated from each other at substantially equal intervals. In the following, for convenience of explanation, the space between the adjacent convex portions 26 and 26 is referred to as a concave portion, and the reference numeral is 28.

  As shown in FIG. 1, the retaining plate 14 is phase-aligned so that the recess 28 is in a position corresponding to the position of the recess 24 of the driven plate 12. That is, the laminated body 10 is manufactured by alternately laminating the driven plate 12 and the retaining plate 14 so that the positions of the concave portions 24 and 28 correspond to each other.

  In the laminate 10, a through hole 30 is formed by the through hole 16 of the driven plate 12 and the through hole 18 of the retaining plate 14.

  Next, a clamp device according to the present embodiment will be described.

  4 and 5 are schematic overall perspective views of the clamping device according to the present embodiment. This clamping device 40 is a device for clamping the laminate 10 shown in FIG. 1 as a work, and includes three fixed claws (first claws) 42a to 42c whose position is not changed, and the fixed claws 42a to 42c. Movable pawls (second claws) 44a to 44c that can be separated from or approached to each other, and the fixed claws 42a to 42c and the movable claws 44a to 44c function as a clamp portion.

  As can be seen from FIG. 4, the clamping device 40 includes a bracket board 46, a cam board 48, and a receiving board 50, and the fixing claws 42 a to 42 c are provided on the bracket board 46. The movable claws 44a to 44c are locked so as to be displaceable.

  The bracket board 46 is provided with three so-called meat steals 52a to 52c. The meat steals 52a to 52c having substantially the same shape are provided in a fan shape so as to follow the circumferential direction of the outer peripheral wall. For this reason, the bracket board 46 is provided with a disk part 56 inside the annular part 54, and three bridge parts 58 a to 58 c having substantially the same shape between the annular part 54 and the disk part 56. It is an extended form. In this case, the bridge portions 58a to 58c are spaced apart from each other at equal intervals, that is, 120 °.

  A guide groove 60 is provided in the bridge portion 58a along the extending direction thereof. The guide groove 60 is provided with a step portion 62 for locking the fixed claw 42a and slidably locking the movable claw 44a. That is, as shown in FIG. 4 and FIG. 6 which is a plan view from the disk portion 56 side (the inner peripheral wall side of the annular portion 54) of the fixed claw 42a, each locking portion of the fixed claw 42a and the movable claw 44a. In 64 and 66, locking grooves 68 and 70 are formed so as to cut out a part of each upper end portion. The stepped portions 62 are inserted into the locking grooves 68 and 70 so that the upper end surfaces of the locking portions 64 and 66 and the upper end surface of the bracket board 46 are flush with each other.

  Here, the fixed claw 42 a has a long grip pin 74 attached to the lower end surface of the locking portion 64 via a pin set screw 72. The gripping pin 74 is a substantially cylindrical body, and extends downward in FIGS. Further, the lower end portion of the positioning pin 76 is embedded in the upper end surface of the locking portion 64, and the upper end portion of the positioning pin 76 is exposed so as to face the cam board 48.

  On the other hand, the movable claw 44a has an L-shaped support portion 78 having a substantially L-shaped cross section extending from the locking portion 66 (see FIG. 4). The L-shaped support part 78 is formed by bending an inner peripheral wall support part (inner wall support part) 80 extending vertically downward in FIG. 4 and the tip of the inner peripheral wall support part 80, and FIG. 4 and an end face support portion 82 extending in the horizontal direction.

  In the inner peripheral wall support portion 80, a long semi-cylindrical rod 84 for gripping having a substantially semi-cylindrical shape is erected on the end face of the fixed claw 42a facing the gripping pin 74. The semi-cylindrical bar 84 is fixed to the L-shaped support portion 78 by mounting screws 86 and 86.

  One end surface support portion 82 extends toward the fixed claw 42a. As will be described later, the end surface support portion 82 functions as a portion that supports the stacked body 10 from the lower end surface side.

  A lower end portion of a guided pin 88 that is a guided member is embedded in an upper end surface of the locking portion 66 of the movable claw 44a. The upper end portion of the guided pin 88 is exposed so as to face the cam board 48, similarly to the positioning pin 76.

  Each of the remaining bridge portions 58b and 58c, the fixed claws 42b and 42c, and the movable claws 44b and 44c are configured in the same manner as each of the bridge portion 58a, the fixed claws 42a and the movable claws 44a. Are denoted by the same reference numerals, and detailed description thereof is omitted.

  As described above, since the bridge portions 58a to 58c are separated from each other by 120 °, the fixed claws 42a to 42c are located at the apexes of the equilateral triangle. Similarly, the movable claws 44a to 44c are located at the vertices of an equilateral triangle.

  In addition, a through hole 90 is provided in the center of the disk portion 56, and on the other hand, bolt holes 92 are formed on both sides of the annular portion 54 in the vicinity of the boundary with the bridge portions 58 a to 58 c.

  The cam disk 48 has a substantially disk shape, and its diameter is set smaller than the diameter of the bracket disk 46 (the distance from the center of the disk part 56 to the outer peripheral wall of the annular part 54). Further, three arc-shaped long holes 94 a to 94 c that are curved along the circumferential direction of the cam disk 48 are formed in the vicinity of the side peripheral wall of the cam disk 48. In other words, the inner peripheral wall and the outer peripheral wall of the arc-shaped elongated holes 94 a to 94 c are provided at positions that are concentric with the outer peripheral wall of the cam board 48. Then, as shown in FIG. 7, the positioning pins 76 of the fixing claws 42a to 42c are inserted into the arc-shaped elongated holes 94a to 94c.

  On the other hand, on the center side of the arc-shaped elongated holes 94a to 94c, three curved toward the side peripheral wall (outer end) side from the center side toward the circumferential direction of the cam panel 48. Cam grooves 96a to 96c are formed so as to penetrate therethrough (see FIGS. 4 and 7). That is, each of the cam grooves 96a to 96c is provided so as to turn from the center side of the cam panel 48 toward the outer end side as it extends. The guided pins 88 of the movable claws 44a to 44c are inserted into the cam grooves 96a to 96c (see FIG. 7).

  Further, a through hole 98 is provided at the center of the cam board 48. A screw hole 102 into which each screw portion of the handle bars 100a to 100c serving as rotating means is screwed is formed on the upper end surface of the cam board 48. 4 shows only the handle bar 100b, in the present embodiment, three handle bars 100a to 100c are provided (see FIGS. 5 and 7).

  The receiving board 50 is formed in a disk shape whose diameter is set substantially equal to the diameter of the bracket board 46, and the cam board 48 is slidably received on the end surface facing the cam board 48. An accommodating portion 104 is provided (see FIGS. 4 and 6). When the cam disc 48 is accommodated in the accommodating portion 104, the side peripheral wall of the cam disc 48 is not visible from the outside (see FIG. 5).

  A through hole 108 provided with an annular step 106 is formed at the center of the receiving board 50 (see FIG. 4). The bracket board 46, the cam board 48, and the receiving board 50 are overlapped so that the positions of the through holes 90, 98, and 108 coincide with each other. A threaded portion of a suspension plug (suspending member engaging portion) 110 for locking a crane wire or the like provided on the ceiling of the station is passed. The nut 112 is screwed into the threaded portion protruding from the through hole 90, thereby preventing the suspension plug 110 from coming off.

  A locking hole 114 is provided through the tip of the suspension plug 110. For example, a hook (not shown) provided on a crane wire or the like is locked to the locking hole 114, so that the clamp device 40 can be moved up and down under the operation of the crane device.

  Fan-shaped meat thefts 116 a to 116 c are formed through the accommodation board 50 at three locations so as to surround the through hole 108. Further, as shown in FIGS. 4 and 8, the three curved long holes 118 a to 118 c penetrate along the circumferential direction of the receiving board 50 in the diameter direction of the meat steals 116 a to 116 c. Is provided. The screw portions of the handle bars 100a to 100c are threaded into the screw holes 102 (see FIG. 4) provided in the upper end surface of the cam board 48 through the curved elongated holes 118a to 118c. The curved long holes 118a to 118c are formed on the center side of the clamp device 40 as compared to the arc-shaped long holes 94a to 94c.

  Here, FIG. 5 shows a state in which the movable claws 44a to 44c are closest to the fixed claws 42a to 42c, while FIGS. 7 and 8 show that the movable claws 44a to 44c are fixed claws 42a to 42c. The state in the most distant position with respect to FIG.

  Further, in the vicinity of the side peripheral wall of the storage board 50, an insertion hole is provided at a position corresponding to the position of the bolt hole 92 provided in the vicinity of the boundary between the annular part 54 constituting the bracket board 46 and the bridge parts 58a to 58c. 120 is formed. As the bolt 122 passed through the insertion hole 120 is screwed into the bolt hole 92, the bracket board 46 and the receiving board 50 are connected to each other.

  Holding bars 124 a and 124 b are installed on the side peripheral wall of the storage board 50 so as to extend outward in the diameter direction of the storage board 50. The operator can hold the holding bars 124a and 124b and displace the clamping device 40 to a predetermined position.

  The clamp device 40 according to the present embodiment is basically configured as described above, and the operation and effect thereof will be described next.

  A crane wire or the like constituting the crane device is locked to the suspension plug 110 of the clamp device 40 via a hook or the like. As a result, it is possible to move the entire clamping device 40 up and down / displace by operating the crane device. For this reason, even if it is a case where the weight of a workpiece | work becomes large, the clamped workpiece | work can be transferred easily.

  As shown in FIG. 10, which is a sectional view taken along the line XX in FIGS. 5, 9, and 8, the clamping device 40 has the movable claws 44 a to 44 c at the positions farthest from the fixed claws 42 a to 42 c. In a state, in other words, with the clamp part opened, the workpiece is moved to a position where the laminated body 10 (see FIG. 1) as a workpiece is provided. Thereafter, as shown in FIG. 11, the movable claws 44 a to 44 c are respectively inserted into the through holes 30 of the laminated body 10, and accordingly, the fixed claws 42 a to 42 c are arranged on the outer peripheral wall side. In the clamping device 40, fixed claws 42a to 42c are disposed in the concave portions 24 between the convex portions 20 and 20 provided on the outer peripheral wall of the driven plate 12 to form the convex portion pair 22, while the movable claws 44a to 44c. Is positioned so as to face the recess 28 of the retaining plate 14.

  The above insertion and alignment are performed by the operator holding the holding bars 124a and 124b.

  After the movable claws 44a to 44c are inserted into the through holes 30, the operator holds at least one of the handle bars 100a to 100c, preferably two, as shown in FIGS. The handle bars 100a to 100c are rotated in the direction of arrow A. As a result, the cam board 48 rotates in the direction of arrow A with the center portion as the center of rotation.

  At this time, the handle bars 100a to 100c are guided to the curved long holes 118a to 118c formed in the storage board 50. For this reason, the cam board 48 can be rotated without causing a rotation center shift.

  As described above, the arc-shaped long holes 94 a to 94 c of the cam board 48 are curved along the circumferential direction of the cam board 48. Therefore, the positioning pins 76 inserted into the arc-shaped elongated holes 94a to 94c do not move toward the inside or outside in the diametrical direction of the clamping device 40 even when the cam plate 48 is rotated. . For this reason, the positions of the fixing claws 42 a to 42 c do not change along the guide groove 60 of the bracket board 46. In other words, by forming the inner and outer peripheral walls of the arc-shaped elongated holes 94a to 94c so as to be concentric with the outer peripheral wall of the cam panel 48, the fixing claws 42a to 42c are locked to the guide groove 60 in a position-invariant manner. It becomes possible to do.

  On the other hand, the cam grooves 96 a to 96 c are provided so as to approach the side peripheral wall side from the center side as it goes in the circumferential direction of the cam board 48. For this reason, as the cam plate 48 rotates, the guided pins 88 inserted into the cam grooves 96a to 96c move from the center side of the cam plate 48 to the side peripheral wall (outer end) side. Following this, the entire movable claws 44a to 44c are displaced toward the outer end side of the cam board 48, that is, toward the fixed claws 42a to 42c while being guided by the guide grooves 60. In other words, as shown in FIG. 12, the movable claws 44a to 44c approach the fixed claws 42a to 42c.

  Finally, the handlebars 100a to 100c are pivoted to the positions shown in FIGS. 7, 8, and 13, so that the semi-cylindrical rod 84 of the movable claws 44a to 44c becomes the recess 28 of the retaining plate 14. (See FIG. 13). When this engagement, in other words, the clamp part is closed, each inner peripheral wall support part 80 of the movable claws 44a to 44c supports the laminated body 10 from the inner peripheral wall side of the through hole 30, while the fixed claws 42a to 42c are provided. The laminated body 10 is supported from the outer peripheral wall side of the laminated body 10, and eventually the laminated body 10 is clamped as shown in FIG.

  Further, the upper end surface of the end surface support portion 82 of the movable claws 44 a to 44 c abuts on the lower end surface of the stacked body 10. With this contact, the laminated body 10 is supported from the lower end surface side by the movable claws 44a to 44c.

  That is, in the present embodiment, the laminated body 10 includes the fixed claws 42a to 42c (gripping pins 74) and the movable claws 44a to 44c (semi-columnar rod body 84) on the outer peripheral wall side and the inner peripheral wall of the through hole 30. And is supported from the lower end surface side by the end surface support portions 82 of the movable claws 44a to 44c. Due to this gripping and supporting, the laminate 10 is prevented from falling off from the clamp device 40.

  In addition, in this case, the fixed claws 42a to 42c and the movable claws 44a to 44c are arranged so as to be located at the apexes of the equilateral triangle. Accordingly, the laminated body 10 is held or supported substantially evenly from three places, and this also makes it difficult for the laminated body 10 to fall off the clamping device 40.

  Here, the gripping pins 74 of the fixed claws 42a to 42c are substantially cylindrical bodies, while the semi-cylindrical rod bodies 84 of the movable claws 44a to 44c are substantially semi-cylindrical bodies. Yes. Accordingly, the stress acting on the convex portion pair 22 of the driven plate 12 and the convex portion 26 of the retaining plate 14 from each of the holding pins 74 and the semi-cylindrical rod 84 is reduced. For this reason, it is avoided that a defect | deletion arises in each convex part 20 and 26 of the driven plate 12 and the retaining plate 14. FIG.

  Thereafter, the clamp device 40 is displaced upward as the crane wire is wound up, and in this state, the clamp device 40 is conveyed to above the clutch drum 130 shown in FIG. Thereafter, the crane wire is fed out and the clamping device 40 is displaced downward, and the operator grips the gripping bars 124a and 124b, so that the convex portion pair 22 of the driven plate 12 and the engaging concave portion 132 of the clutch drum 130 are brought into contact with each other. Perform alignment.

  Next, the crane wire is further fed to displace the clamping device 40 further downward. As a result, as shown in FIG. 15, the laminated body 10 is accommodated at a predetermined position of the clutch drum 130.

  After the stacked body 10 is accommodated, the operator rotates the handlebars 100a to 100c in the direction opposite to the arrow A direction in FIGS. 9 and 11, thereby causing the cam board 48 to be reverse to the above. Rotate in the direction. Following this rotational movement, the guided pin 88 moves from the side peripheral wall (outer end) side of the cam board 48 to the center side, and the movable claws 44a to 44c are guided by the guide grooves 60 while the fixed claws 42a to 42c. It is displaced in a direction away from 42c. That is, the clamp on the laminated body 10 is released.

  Thereafter, the crane wire is wound up, and the clamping device 40 is displaced upward and is separated from the clutch drum 130.

  Thus, according to this embodiment, a multi-plate clutch can be assembled without using an articulated robot or the like. Therefore, the work space is narrowed, and this increases the degree of freedom in layout of device arrangement.

  In addition, in this case, since the laminate 10 is clamped from both the inner peripheral wall side and the outer peripheral wall side, the laminate 10 is conveyed while maintaining the phase of the driven plate 12 and the retaining plate 14 in the laminate 10. It becomes extremely easy to do.

  In the above-described embodiment, the clutch plate made of the laminated body 10 is exemplified and described as a workpiece. However, the workpiece is not particularly limited to this, and any workpiece provided with a through hole may be used. . That is, for example, a rectangular workpiece may be used. Of course, the through hole is not limited to a circular cross section, and may have a square cross section.

  The fixing claws 42 a to 42 c are fixed in position by locking the locking grooves of the locking portions to the bracket board 46 and inserting the positioning pins 76 into the arc-shaped elongated holes 94 a to 94 c of the cam board 48. There is no particular need, and for example, a fixing pin that protrudes from the lower end surface of the bracket board 46 and is positioned and fixed may be used as the fixing claws 42a to 42c.

  Furthermore, instead of the fixed claws 42a to 42c, movable claws 44a to 44c may be adopted, and both claws may be used as the movable claws 44a to 44c. In this case, along with the cam grooves 96a to 96c approaching the outer end side from the center side toward the circumferential direction of the cam panel 48, the side circumferential wall ( A cam groove that is curved so as to approach the central portion side from the outer end portion side may be provided in place of the arc-shaped elongated holes 94a to 94c. With this configuration, the opposing movable claws can be moved closer to each other or separated from each other as the cam panel 48 is rotated.

  Furthermore, the number of first claws and second claws is not limited to three, but may be two each, or four or more.

It is a general | schematic whole perspective view of the laminated body clamped by a clamp apparatus. It is a schematic whole plan view of the driven plate which comprises the laminated body of FIG. It is a schematic whole plan view of the retaining plate which comprises the laminated body of FIG. It is a schematic whole perspective view (disassembled state) of the clamp device concerning this embodiment. It is a general | schematic whole perspective view (assembly state) of the clamp apparatus of FIG. It is a top view from the disk part side of a fixed nail | claw. It is a general | schematic whole sectional top view when the clamp part of the clamp apparatus of FIG. 4 closes. FIG. 5 is an upper plan view of the clamping device of FIG. 4. FIG. 5 is a schematic overall cross-sectional plan view when a clamp portion of the clamp device of FIG. 4 is opened. It is XX arrow directional cross-sectional view of FIG. It is a schematic plan view which shows the state by which a movable nail | claw is inserted in the through-hole of a laminated body, and the fixed claw is arrange | positioned at the outer peripheral wall side of the said laminated body. It is a principal part longitudinal cross-sectional view which shows the state which the clamp part closed from the state of FIG. FIG. 12 is a schematic plan view showing a state where the clamp portion is closed from the state of FIG. 11 and the laminated body is clamped by the movable claw and the fixed claw. It is a schematic perspective view showing a state in which a laminated body is clamped with a movable claw and a fixed claw and conveyed to above the clutch drum. It is a schematic perspective explanatory view which shows the state which accommodated the laminated body in the clutch drum and was cancelled | released from the clamp.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Laminated body 12 ... Driven plate 14 ... Retaining plate 30 ... Through-hole 40 ... Clamp apparatus 42a-42c ... Fixed nail | claw (1st nail | claw)
44a to 44c ... movable claw (second claw) 46 ... bracket board 48 ... cam board 50 ... receiving board 58a-58c ... bridge 60 ... guide groove 68, 70 ... locking groove 74 ... gripping pin 76 ... positioning pin 78 ... L-shaped support part 80 ... Inner peripheral wall support part 82 ... End face support part 84 ... Semi-cylindrical rod body 88 ... Guide pins 94a to 94c ... Elongated arc holes 96a to 96c ... Cam grooves 100a to 100c ... Handle bar 104 ... Housing part 110 ... Hanging plug 114 ... Locking holes 118a to 118c ... Curved oblong holes 124a, 124b ... Holding bar 130 ... Clutch drum 132 ... Engaged recess

Claims (9)

A clamping device for clamping a workpiece having a through hole from the inner wall side and the outer wall side of the through hole,
At least two first claws for supporting the workpiece from the outer wall side;
An inner wall supporting portion that supports the workpiece from the inner wall side; and a guided member that protrudes to the other end side of the inner wall supporting portion, and is at least separated or accessible with respect to the first claw. Two second nails,
A bracket board provided with a guide groove extending from the outer end portion toward the central portion and slidably locked to the second claw, and provided with the first claw;
A cam groove that is pivoted so as to approach the outer end side from the center side and through which the guided member is passed, and is provided on the bracket board;
A housing panel that can house the cam panel in a slidable manner and that is coupled to the bracket board;
Rotating means provided on one end surface of the cam panel and exposed from the storage panel, and for rotating the cam panel relative to the bracket panel and the storage panel;
Comprising
When the cam plate rotates with respect to the bracket disc and the receiving disc by energizing the rotating means, the guided member is guided to the cam groove of the cam disc, so that the bracket disc is As the guide groove is reciprocated, each of the second claws approaches or separates from each of the first claws.   2. The clamping device according to claim 1, wherein an elongated hole that is curved in an arc shape is provided in the receiving board, and the rotating means is provided in the cam board at a position corresponding to the position of the elongated hole, the rotating means. Projecting from the elongated hole.   3. The clamping device according to claim 1, wherein three first claws and two second claws are provided, and each of the first claws and the second claws is positioned at a vertex of an equilateral triangle. A clamping device characterized by the above.   The clamp apparatus of any one of Claims 1-3 WHEREIN: The suspension member latching | locking part is provided in the center part of the said storage board, The clamp apparatus characterized by the above-mentioned.   5. The clamp device according to claim 1, wherein the second claw is bent at a tip of the inner wall support portion and extends toward the first claw side, and the workpiece. A clamp device comprising an end face support portion for supporting one end face of the head.   The clamping device according to claim 1, wherein the first claw is a fixed claw that is not displaced.   The clamping device according to any one of claims 1 to 5, wherein the first claw is a movable claw that can approach or separate from the second claw.   The clamping device according to any one of claims 1 to 6, wherein the workpiece is a stacked body in which a plurality of annular plates are stacked on each other.   9. The clamping device according to claim 8, wherein the laminated body is a clutch plate constituting a multi-plate clutch.

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