JP2010155307A - Workpiece holding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece holding device preventing a sudden rotation of the workpiece when the restriction of the workpiece rotation is released. <P>SOLUTION: The workpiece holding device includes: a base part; a holing part for holding the workpiece; a shank; a first flange part disposed at one end of the shank; a second flange part disposed at the other end of the shank; a rotor to which the holding part is coupled; a rotor supporting part having a horizontal through-hole into which the shank of the rotor is inserted, and rotatably supporting the rotor around the axis of the shank, and being vertically disposed at the base part; a locking means for unrotatably locking the rotor; a brake member which has a sliding surface slidingly contacting a flange side surface of the first flange part and is attached to the rotor supporting part; and a pressing means for pressing the brake member against the flange side surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a workpiece holding device capable of adjusting the posture of a workpiece to be held.

  When performing various operations such as assembly of parts to a workpiece, processing, or inspection, it is convenient in terms of work if the workpiece is held so that the work target portion faces the operator. Patent Documents 1 and 2 disclose an apparatus capable of rotating a work to be held around a horizontal axis.

JP 2006-56680 A JP 2007-203385 A

  However, the apparatus described in Patent Document 1 performs rotation of a workpiece using an actuator as a drive source, which complicates the mechanism, increases costs, and requires a power source. In the apparatus described in Patent Document 2, the weight of the entire apparatus becomes heavy because of a configuration that balances the work using a counterweight. Further, since the workpiece is stopped by balancing using the counterweight, the rotation of the workpiece is not mechanically restricted. Therefore, if a force is applied during work, the work rotates, which is inconvenient depending on the work contents. In order to regulate the rotation of the workpiece, the cited document 2 describes that it is desirable to provide a speed reducer that decelerates the rotation of the workpiece, but does not disclose a specific configuration.

  In order to prevent the workpiece from rotating during work, it is preferable to mechanically restrict the rotation of the workpiece. In this case, for the safety of the operator, it is necessary to prevent the workpiece from suddenly rotating when the restriction is released.

  An object of the present invention is to provide a workpiece holding device that can prevent a workpiece from suddenly rotating when the restriction on the rotation of the workpiece is released.

  According to the present invention, the base portion, the holding portion for holding the workpiece, the shaft portion, the first flange portion provided at one end portion of the shaft portion, and the other end portion of the shaft portion are provided. A rotary body having a second flange portion, to which the holding portion is coupled, and a horizontal through-hole through which the shaft portion of the rotary body is inserted, wherein the rotary body is an axis of the shaft portion. A rotating body supporting portion that is rotatably supported around the base portion, a column portion that is erected on the base portion, a locking unit that locks the rotating body in a non-rotatable manner, and a flange side surface of the first flange portion; There is provided a work holding device comprising: a braking member having a sliding contact surface that is in contact; and a braking member mounted on the rotating body support portion; and a pressing unit that presses the braking member against a side surface of the flange. .

  According to the present invention, it is possible to provide a workpiece holding device that can prevent a workpiece from rotating suddenly when the restriction on the rotation of the workpiece is released.

<First Embodiment>
1 is a perspective view of a workpiece holding device A according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the workpiece holding device A, and FIG. 3 is a sectional view taken along line XX in FIG. The workpiece holding device A includes a base portion 10, a holding portion 20 that holds a workpiece (not shown), a rotating body 30, a support column portion 40, a locking device 50, a braking member 60, and a coil spring 70.

  The base unit 10 includes a base plate 11 and a turntable 12 supported by the base plate 11 and supported by the base plate 11 so as to be rotatable about a vertical line LV (FIG. 1). The holding unit 20 includes a U-shaped plate member 21 and a plurality of clamps 22 provided on the plate member 21. The plurality of clamps 22 and the plate member 21 can hold and hold a plurality of locations of a workpiece (not shown) that is a work target. The workpiece to be worked is, for example, an engine. In addition, the structure of the holding | maintenance part 20 is not restricted to this, The various structures which can hold | maintain a workpiece | work are employable.

  The rotating body 30 includes a shaft portion 31, a flange portion (second flange portion) 32 provided at one end portion of the shaft portion 31, and a flange portion (first flange portion) provided at the other end portion of the shaft portion 31. 33). In the case of the present embodiment, the shaft portion 31 is a solid cylindrical body, but may be a cylindrical body. A plurality of screw holes 31 a are formed on both end surfaces of the shaft portion 31. Moreover, the axial part 31 has the small diameter parts 31b and 31b through the level | step-difference part in the both ends. Bolt holes 32a and 33a are formed in the flange portion 32 and the flange portion 33, respectively. Thus, the flange portion 32 and the flange portion 33 can be fixed to the shaft portion 31 by inserting bolts into the bolt holes 32 a and 33 a and screwing the bolts into the screw holes 31 a.

  The flange portion 32 and the flange portion 33 have a larger cross-sectional shape than the cross-sectional shape of the shaft portion 31. The flange portion 32 is formed in a disk shape, and a plurality of concave portions 32b are formed on the periphery thereof. The flange portion 33 has a semicircular portion and a square portion, and is attached perpendicularly to a plane formed by the plate member 21 of the holding portion 20. In the case of the present embodiment, the flange portion 33 and the plate member 21 are separately connected and fixed, but the flange portion 33 and the plate member 21 may be integrally formed.

  The support column 40 includes a support member 41 and a rotating body support 42. The column member 41 has a T-shaped cross section and is erected on the turntable 12. The lower end portion of the column member 41 is fixed to the turntable 12 by welding or the like. Further, the support member 41 and the turntable 12 may be integrally formed from the beginning by casting or the like.

  The rotating body support portion 42 is provided at the upper end portion of the support member 41. The support member 41 and the rotating body support portion 42 are fixed by welding or the like. Further, the support member 41 and the rotating body support portion 42 may be integrally formed from the beginning by casting or the like.

  The rotating body support portion 42 has a horizontal through hole 42a through which the shaft portion 31 of the rotating body 30 is inserted, and has a cylindrical shape as a whole. Both end portions of the through-hole 42a are large-diameter enlarged portions 142b, and the ball bearings 42b are seated on the enlarged-diameter portions 142b. The ball bearings 42b are extrapolated to the small diameter portions 31b respectively located in the enlarged diameter portions 142b of the through holes 42a. The rotator 30 is supported by a pair of ball bearings 42b and is supported by the rotator support 42 so as to be rotatable about a horizontal line LH (FIG. 1) that is the axis of the shaft 31.

  The rotating body support portion 42 includes a protruding portion (flange portion) 42c that protrudes radially outward from the peripheral surface thereof. In the case of the present embodiment, the projecting portion 42 c is formed in an annular shape and is integrally formed with the rotating body support portion 42. A plurality (six in this case) of concave portions 42d are provided at equal intervals along the circumferential direction on the end surface of the protruding portion 42c on the braking member 60 side (right side in FIG. 3). One end of the coil spring 70 is inserted into these recesses 42d. In the present embodiment, the projecting portion 42c is formed in a flange circle shape continuous in the circumferential direction. However, it is only necessary to be able to form each concave portion 42d, and a plurality of discontinuous flange portions are provided in the circumferential direction, and the concave portion 42d is provided in each flange portion. You may make it provide.

  The lock device 50 includes a slide member 51, a guide member 52, a lever member 53, a coil spring 54, and a spring base 55. The slide member 51 is a rod-shaped member having a tip portion (upper end portion) that can be inserted into and removed from the concave portion 32 b of the flange portion 32. The guide member 52 is fixed to the support member 41 and has a guide hole 52a for guiding the movement of the slide member 51 in the vertical direction. In this embodiment, the guide member 52 is fixed to the support member 41. However, the mounting position is particularly limited as long as the slide member 51 can be guided movably along the radial direction of the flange portion 32. is not.

  The spring pedestal 55 is fixed to the support member 41 so as to be spaced downward from the lower end of the guide member 52. The coil spring 54 is interposed between the lower end portion of the slide member 51 and the spring base 55 and biases the slide member 51 upward. The coil spring 54 may be another type of elastic member. The lever member 53 is connected to the lower portion of the slide member 51 and is provided perpendicular to the slide member 51.

  In the lock device 50 having such a configuration, the tip of the slide member 51 is inserted into and engaged with the recess 32b by the bias of the coil spring 54, and the rotation of the rotating body 30 around the line LH is locked. Thereby, rotation of the workpiece | work hold | maintained at the holding | maintenance part 20 can be controlled mechanically. When releasing the lock, the operator pushes the lever member 53 downward, so that the slide member 51 is lowered against the bias of the coil spring 54, and the engagement between the slide member 51 and the recess 32b is released. .

  The braking member 60 is an annular member having an opening 61 having a slightly larger diameter than the outer periphery of the rotating body support portion 42. The braking member 60 is extrapolated to the outer peripheral portion of the rotating body support portion 42 on the flange portion 33 side (right side in FIG. 3), and is attached to the rotating body support portion 42 in a loosely fitted state. The braking member 60 may have another shape such as a C shape as long as the braking member 60 can be attached to the peripheral surface of the rotating body support portion 42.

  A plurality (six in this case) of recesses 62 are provided at equal intervals along the circumferential direction on the end surface of the braking member 60 on the protruding portion 42c side (left side in FIG. 3). The other end of the coil spring 70 is inserted into these recesses 62. Each recessed part 62 is provided in the position facing each recessed part 42d of the protrusion part 42c. Further, the side surface of the braking member 60 on the flange portion 33 side is a sliding contact surface 63 (FIG. 3) that is in sliding contact with the side surface of the flange portion 33.

  The coil spring 70 is inserted between the protruding portion 42c and the braking member 60, and presses the braking member 60 toward the flange portion 33. Further, by inserting each end of the coil spring 70 into the recess 42d of the protrusion 42c and the recess 62 of the brake member 60, the brake member 60 is connected to the rotating body support 42 by the line LH (FIG. 1). ) Restrict rotation around. In the case of this embodiment, six coil springs 70 are provided in accordance with the number of recesses 42d and 62. The coil spring 70 may be another type of elastic member.

  In the work holding device A having such a configuration, the work that is a work target can be held by the holding unit 20 to perform work on the work. Here, since the turntable 12 is rotatable around the vertical line LV (FIG. 1), the direction of the workpiece can be changed around the line LV (FIG. 1). Further, since the rotating body 30 is rotatable around a horizontal line LH (FIG. 1), the direction of the workpiece can be changed around the line LH (FIG. 1).

  When the center of gravity of the workpiece does not exist in the vertical plane including the line LH (FIG. 1), a force that rotates the rotating body 30 acts by gravity with respect to the workpiece. In the case of this embodiment, by providing the lock device 50, the rotation of the rotating body 30, that is, the rotation of the workpiece can be mechanically restricted. A plurality of concave portions 32b are provided in the circumferential direction in the flange portion 32, and the holding angle of the workpiece can be freely changed by changing the position of the concave portion 32b with which the slide member 51 is engaged.

  On the other hand, the braking member 60 is always pressed against the flange portion 33 by the bias of the coil spring 70, and is between the sliding contact surface 63 of the braking member 60 and the side surface of the flange portion 33 (end surface on the braking member 60 side). Due to this frictional force, a resistance force always acts on the rotation of the rotating body 30, that is, the rotation of the workpiece. For this reason, when the lock of the lock device 50 in the locked state is released, it is possible to prevent the workpiece from rotating suddenly. In addition, since the sudden rotation prevention mechanism uses the rotating body support portion 42 that supports the rotating body 30, it can be configured more compactly. Therefore, the work holding device A can be made compact while preventing the work from rotating suddenly when the lock is released.

  In the present embodiment, the workpiece is prevented from suddenly rotating by the frictional force between the braking member 60 and the flange portion 33. However, the workpiece is prevented from suddenly rotating by the frictional force between the braking member 60 and the flange portion 32. It is good. Moreover, although the locking device 50 is provided on the flange portion 32 side, a configuration in which it is provided on the flange portion 33 side may be employed.

<Second Embodiment>
In the said 1st Embodiment, although it was set as the structure which loosely fits the braking member 60 to the rotary body support part 42, you may employ | adopt another mounting | wearing aspect. FIG. 4 is a cross-sectional view of a work holding device according to a second embodiment of the present invention, and corresponds to a cross-sectional view taken along line XX in FIG. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted, and only different components are described.

  As for the rotary body support part 42A replaced with the rotary body support part 42, the protrusion part 42c is located in the edge part of 42 A of rotary body support parts. A braking member 60 </ b> A in place of the braking member 60 is disposed between the flange portion 33 and the end surface of the rotating body support portion 42 </ b> A on the flange portion 33 side. Similar to the braking member 60, the braking member 60A is an annular member, but the opening 61A in place of the opening 61 is sized to loosely fit the shaft portion 31. Thus, the braking member 60A is attached to the rotating body support portion 42A (projecting portion 42c) via the coil spring 70.

  As in the first embodiment, the braking member 60A is always pressed against the flange portion 33 by the bias of the coil spring 70, and the friction between the sliding contact surface 63 of the braking member 60A and the side surface of the flange portion 33 is maintained. The force constitutes a mechanism for preventing sudden rotation of the workpiece.

<Third Embodiment>
In the first embodiment, the pressing force of the braking member 60 against the flange portion 33 is constant, but it can be variable. FIG. 5 is an exploded perspective view of the work holding device B according to the third embodiment of the present invention, and FIG. 6 is a cross-sectional view of the work holding device B, which corresponds to a cross-sectional view taken along line XX in FIG. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted, and only different components are described.

  The work holding device B includes an adjustment unit 80 and a pressing member 90. The adjusting portion 80 is fixed to a pair of shaft portions 81 that are spaced apart on the same axis, a cam member 82 that is fixed to the middle portion of the shaft portion 81, and each end portion outside the shaft portion 81. A U-shaped lever member 83;

  The pressing member 90 is an annular member having an opening 91 having a slightly larger diameter than the outer periphery of the rotating body support portion 42B. The opening 91 of the pressing member 90 is extrapolated to the peripheral surface of the rotating body support 42B, and is attached to the rotating body support 42B in a loosely fitted state on the flange 32 side of the protrusion 42c. Therefore, the pressing member 90 is movable along the axial direction of the rotating body support portion 42B.

  The pressing member 90 may have another shape such as a C shape as long as the pressing member 90 can be mounted on the peripheral surface of the rotating body support portion 42B. A plurality of (here, six) pressing protrusions 92 (FIG. 6) are provided at equal intervals along the circumferential direction on the surface of the pressing member 90 on the protruding portion 42c side. Each pressing protrusion 92 is a pin member that protrudes toward the protruding portion 42c.

  The rotating body support portion 42B includes a pair of holes 42f into which the inner ends of the shaft portion 81 in the adjustment portion 80 are inserted (only one hole 42f is shown in FIG. 5). The adjusting portion 80 is supported by the shaft portion 81 in the hole 42f so as to be rotatable around the shaft portion 81 with respect to the rotating body support portion 42B. In the state attached to the rotating body support portion 42B, the axial direction of the shaft portion 81 of the adjusting portion 80 is a direction orthogonal to the axial direction of the rotating body support portion 42B.

  For this reason, the cam member 82 rotates around the direction orthogonal to the axial direction of the rotating body support portion 42B (that is, around the axis of the shaft portion 81) by the rotation of the adjusting portion 80. In addition, in a state where the adjustment unit 80 is attached to the rotating body support 42B, the cam surface that is the peripheral surface of the cam member 82 abuts on the side surface (end surface) of the pressing member 90 on the flange portion 32 side.

  Next, the protrusion part 42c of the rotating body support part 42B includes a hole part 42e communicating with the concave part 42d in each concave part 42d. The hole part 42e is opened in the side surface by the side of the flange part 32 of the protrusion part 42c. The pressing member 90 is disposed at a position where each pressing protrusion 92 is inserted through the hole 42e and into the recess 42d in the axial direction of the rotating body support 42B. A piston 71 is disposed in the recess 42 d between the bottom of the recess 42 d and the coil spring 70, and the pressing protrusion 92 presses the end of the coil spring 70 through the piston 71.

  In the workpiece holding device B having such a configuration, the pressing force of the braking member 60 against the flange portion 33 can be changed by the operator operating the adjustment unit 80. That is, when the operator grips the lever member 83 and rotates the adjustment unit 80 clockwise in FIG. 6, the cam member 82 rotates, and the cam surface of the cam member 82 contacts the side surface of the pressing member 90. The pressing member 90 is moved to the right in FIG. 6 against the bias of the coil spring 70. As a result, the pressing projection 92 presses the end of the coil spring 70 via the piston 71 and the coil spring 70 is compressed, and the pressing force against the flange 33 of the braking member 60 increases. Since the frictional force between the sliding contact surface 63 of the braking member 60 and the side surface of the flange portion 33 increases, the rotation force of the rotating body 30, that is, the resistance force against the rotation of the workpiece increases. The resistance force is proportional to the amount of movement of the pressing member 90, that is, proportional to the operator's operating force on the adjustment unit 80.

  Thus, in this embodiment, the pressing force of the braking member 60 against the flange portion 33 can be made variable, and the rotation speed of the workpiece can be adjusted when the lock device 50 releases the lock.

  In the present embodiment, the adjustment unit 80 is manually operated, but may be electrically operated. In this case, the lever member 83 is unnecessary, but it is necessary to provide a driving device such as a motor for rotating the cam member 82.

<Fourth embodiment>
In the said 3rd Embodiment, although it was set as the structure which loosely fits the braking member 60 to the rotary body support part 42, you may employ | adopt another mounting | wearing aspect. FIG. 7 is a cross-sectional view of a work holding device according to a fourth embodiment of the present invention, and corresponds to a cross-sectional view taken along line XX in FIG. The same components as those in the third embodiment are denoted by the same reference numerals and description thereof is omitted, and only different components are described.

  As for the rotary body support part 42C replaced with the rotary body support part 42B, the protrusion part 42c is located in the edge part of the rotary body support part 42C. A braking member 60 </ b> B instead of the braking member 60 is disposed between the flange portion 33 and the end surface on the flange portion 33 side of the rotating body support portion 42 </ b> C. Similar to the braking member 60, the braking member 60 </ b> B is an annular member, but the opening 61 </ b> B replacing the opening 61 is sized to loosely fit the shaft portion 31. Thus, the braking member 60B is attached to the rotating body support portion 42C (projecting portion 42c) via the coil spring 70.

  Similar to the third embodiment, the operator can change the pressing force of the braking member 60 </ b> B against the flange portion 33 by operating the adjusting portion 80.

<Fifth Embodiment>
In the said 3rd Embodiment, although the rotary body support part 42C was the structure which has the protrusion part 42c, the structure which does not have the protrusion part 42c is also employable. FIG. 8 is a cross-sectional view of a work holding device according to a fifth embodiment of the present invention, and corresponds to a cross-sectional view taken along line XX in FIG. The same components as those in the third embodiment are denoted by the same reference numerals and description thereof is omitted, and only different components are described.

  A rotating body support portion 42D instead of the rotating body support portion 42C does not have a configuration corresponding to the protruding portion 42c, and forms a cylindrical body with a flat peripheral surface. Plural (here, six) recesses 93 are provided at equal intervals along the circumferential direction on the end surface of the pressing member 90 </ b> A instead of the pressing member 90 on the braking member 60 side. The pressing member 90A does not have a pressing protrusion. Each recess 93 is provided at a position facing each recess 62 of the braking member 60. One end of the coil spring 70 is inserted into the recess 93 and the other end is inserted into the recess 62.

  Similar to the third embodiment, the operator can change the pressing force of the braking member 60 against the flange portion 33 by operating the adjusting portion 80.

<Sixth Embodiment>
In the said 5th Embodiment, although it was set as the structure which loosely fits the braking member 60 to the rotary body support part 42, you may employ | adopt another mounting | wearing aspect. FIG. 9 is a cross-sectional view of a workpiece holding device according to a sixth embodiment of the present invention, and corresponds to a cross-sectional view taken along line XX in FIG. The same components as those in the fifth embodiment are denoted by the same reference numerals and description thereof is omitted, and only different components are described.

  A rotating body support portion 42E that replaces the rotating body support portion 42D has a shorter axial length. A braking member 60C in place of the braking member 60 is disposed between the flange portion 33 and the end surface of the rotating body support portion 42E on the flange portion 33 side. Like the braking member 60, the braking member 60C is an annular member, but the opening 61C in place of the opening 61 is sized to loosely fit the shaft portion 31. Thus, the braking member 60C is attached to the rotating body support 42E via the coil spring 70 and the pressing member 90A.

  Similar to the third embodiment, the operator can change the pressing force of the braking member 60 </ b> B against the flange portion 33 by operating the adjusting portion 80.

<Seventh embodiment>
In the locking device 50 according to the first embodiment, the lock is released by the operator's push-down operation on the lever member 53, but other configurations may be employed. FIG. 10 is an exploded perspective view of the locking device 150 according to the seventh embodiment of the present invention. The lock device 150 includes a slide member 151, a guide member 152, a lever member 153, a cam member 154, and a coil spring 155.

  The slide member 151 is a rod-like member that has a front end portion (upper end portion) that can be selectively inserted into and removed from any of the plurality of concave portions 32b of the flange portion 32 and extends in the vertical direction. In the middle of the slide member 151, a recess 151a to which the cam portion 154b of the cam member 154 is mounted is formed. A long hole 151b extending vertically is formed in the bottom of the recess 151a, through which the shaft 154a of the cam member 154 is inserted. The axial direction of the shaft portion 154a is directed in a direction (horizontal direction) orthogonal to the moving direction (vertical direction) of the slide member 151. A part of the long hole 151b is formed in the shoulder 151c that defines the lower portion of the recess 151a. On the lower end surface of the slide member 151, a hole 151d into which the bolt 152d is inserted is formed.

  The guide member 152 is fixed to the support member 41 (see FIGS. 1 and 2). The guide member 152 has a recess 152a that guides the movement of the slide member 151 in the vertical direction. The upper part of the recess 152a is opened upward. In the middle of the recess 152a, a notch 152b for avoiding interference with the cam 154b of the cam member 154 is formed. A hole 152c into which the shaft portion 154a of the cam member 154 is inserted is formed at the bottom of the recess 152a. The cam member 154 is supported by the guide member 152 so as to be rotatable about the axis of the shaft portion 154a, with the shaft portion 154a being pivotally supported by the hole 152c.

  A screw hole into which the bolt 152d is screwed is provided at the lower portion of the recess 152a, and the screw rod portion of the bolt 152d enters the recess 152a. A coil spring 155 is attached to the screw rod portion of the bolt 152d. The coil spring 155 is an elastic member that is inserted between the lower end surface of the slide member 151 and the lower end portion of the concave portion 152a and constantly biases the slide member 151 upward, but may be another type of elastic member. . The cam member 154 has a cylindrical shape concentric with the shaft portion 154a and has a portion 154c through which the lever member 153 passes.

  In assembling the locking device 150 having such a configuration, first, the coil spring 155 is attached to the threaded rod portion of the bolt 152d. Next, the slide member 151 is accommodated in the recess 152a in a state where the screw rod portion of the bolt 152d is loosely fitted in the hole 151d of the slide member 151. At this time, the coil spring 155 is inserted between the lower end surface of the slide member 151 and the lower end portion of the recess 152a. Subsequently, the shaft portion 154a of the cam member 154 fitted with the lever member 153 is inserted into the hole 152c through the long hole 151b. This completes the assembly.

  The slide member 151 is always urged upward by a coil spring 155, and its tip is inserted into and engaged with a recess 32b (not shown in FIG. 10) of the flange 32, and the rotating body 30 (not shown in FIG. 10). Locks to non-rotatable. At this time, the shaft portion 154a of the cam member 154 is located at the lowermost portion of the long hole 151b of the slide member 151, and the cam portion 154b and the shoulder portion 151c are not in contact with each other.

  In order to release the lock, the lever member 153 is operated to rotate the cam member 154 around the shaft portion 154a. Then, the cam portion 154b comes into contact with the shoulder portion 151c, and a force that moves downward against the coil spring 155 acts on the slide member 151. Since the shaft portion 154a of the cam member 154 is inserted into the hole 152c of the guide member 152 and does not move with respect to the guide member 152, the slide member 151 moves downward and the lock is released. At this time, the shaft portion 154 a of the cam member 154 is positioned on the upper side of the long hole 151 b of the slide member 151.

  As described above, in the lock device 150 of the present embodiment, the lock can be released with a smaller operation force on the lever member 153 by using the cam mechanism. In the present embodiment, the lever member 153 and the cam member 154 constitute a moving mechanism for manually moving the slide member 151. However, a moving mechanism for electrically moving the slide member 151 may be used. In this case, the lever member 153 is unnecessary, but it is necessary to provide a driving device such as a motor for rotating the cam member 154.

It is a perspective view of work holding device A concerning one embodiment of the present invention. 2 is an exploded perspective view of a work holding device A. FIG. It is sectional drawing which follows the line XX of FIG. It is sectional drawing of the workpiece holding apparatus which concerns on 2nd Embodiment of this invention. It is a disassembled perspective view of the workpiece holding apparatus B which concerns on 3rd Embodiment of this invention. 2 is a cross-sectional view of a work holding device B. FIG. It is sectional drawing of the workpiece holding apparatus which concerns on 4th Embodiment of this invention. It is sectional drawing of the workpiece holding apparatus which concerns on 5th Embodiment of this invention. It is sectional drawing of the workpiece holding apparatus which concerns on 6th Embodiment of this invention. It is a disassembled perspective view of the locking device 150 concerning 7th Embodiment of this invention.

Explanation of symbols

A, B Workpiece holding device 10 Base portion 20 Holding portion 30 Rotating body 40 Strut portion 50 Locking device 60 Braking member 70 Coil spring

Claims (10)

A base part;
A holding unit for holding the workpiece;
A rotation having a shaft portion, a first flange portion provided at one end portion of the shaft portion, and a second flange portion provided at the other end portion of the shaft portion, wherein the holding portion is connected. Body,
The rotating body has a horizontal through-hole through which the shaft portion is inserted, and has a rotating body support portion that rotatably supports the rotating body around the axis of the shaft portion, and is erected on the base portion The supported struts,
Locking means for locking the rotating body in a non-rotatable manner;
A braking member having a sliding contact surface in sliding contact with a flange side surface of the first flange portion, and mounted on the rotating body support portion;
Pressing means for pressing the braking member against the flange side surface;
A workpiece holding device characterized by comprising: The rotating body support portion has a cylindrical shape,
The work holding device according to claim 1, wherein the braking member is an annular member loosely fitted to the rotating body support portion. The rotating body support is
A first end surface on the first flange portion side and a second end surface on the second flange portion side;
The braking member is
The work holding device according to claim 1, wherein the work holding device is an annular member that is disposed between the first end surface and the first flange portion and through which the shaft portion is inserted. The rotating body support portion has a cylindrical shape, and includes a protruding portion protruding outward in the radial direction,
The work holding apparatus according to claim 1, wherein the pressing unit includes an elastic member interposed between the protruding portion and the braking member. The elastic member is a coil spring;
The projecting portion extends in the circumferential direction of the rotating body support portion and has one side surface facing the braking member;
A plurality of first concave portions spaced apart in the circumferential direction of the rotating body support portion are formed on the one side surface of the protruding portion,
The braking member has a plurality of second recesses facing the plurality of first recesses,
The work holding apparatus according to claim 4, wherein a plurality of the coil springs are provided, and one end thereof is inserted into the first recess and the other end is inserted into the second recess. The rotating body support portion has a cylindrical shape,
The pressing means is
A pressing member having an opening through which the rotating body support portion is inserted and mounted on the rotating body support portion so as to be movable in the axial direction of the rotating body support portion on the second flange portion side of the braking member. When,
An elastic member interposed between the pressing member and the braking member;
An adjustment unit for adjusting the amount of movement of the pressing member;
The work holding apparatus according to claim 1, further comprising: The protrusion is
The other side surface of the second flange portion side;
A hole communicating with the first recess and opening on the other side surface;
Have
The pressing means is
A pressing member that has an opening through which the rotating body support portion is inserted and that is mounted on the rotating body support portion so as to be movable in the axial direction of the rotating body support portion on the second flange portion side of the protruding portion. When,
An adjustment unit for adjusting the amount of movement of the pressing member,
The pressing member is
The workpiece holding device according to claim 5, further comprising a pressing projection that is inserted through the hole and enters the first recess and presses the one end of the coil spring. The pressing member has a side surface on the second flange portion side;
The adjustment unit is
A cam member having a cam surface that is mounted on the rotating body support portion so as to be rotatable about an axis orthogonal to the moving direction of the pressing member and abuts against the side surface of the pressing member;
A lever member for manually rotating the cam member;
The work holding apparatus according to claim 6 or 7, further comprising: The first flange part or the second flange part is provided with a plurality of recesses provided along the periphery thereof,
The locking means is
A slide member having a tip portion that can be selectively inserted into and removed from the plurality of recesses;
A guide member that is provided on the support column and that is mounted with the slide member and supports the slide member to be movable in the vertical direction;
An elastic member for urging the slide member upward;
A moving mechanism that moves the slide member downward against the elastic member;
The work holding apparatus according to claim 1, further comprising: The moving mechanism is
A cam member that is rotatably supported about an axis orthogonal to the moving direction of the slide member, has a cam surface that contacts the slide member, and lowers the slide member by rotation;
A lever member for manually rotating the cam member;
The work holding apparatus according to claim 9, further comprising:

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