JP4529849B2 - Work holding device - Google Patents

Description

  The present invention relates to a workpiece holding device that places and holds a workpiece on a swing table that is swingably supported.

  FIGS. 7A and 7B show an example of a manufacturing mode of the resin sensor case SC by laser bonding. When manufacturing the sensor case SC, first, as shown in FIG. 6A, the base portion of the connector portion P1 is fitted into a recess formed in one corner of the main body portion P2 having a substantially rectangular shape. Along the broken line shown in (b), the laser light is irradiated from two directions on the upper surface M1 side and one side surface M2 side of the sensor case SC, and these are integrally joined. At this time, if the laser light irradiation is performed while rotating the sensor case SC about the axis L shown in the figure during processing, it is not necessary to move the irradiation position of the laser light greatly, and the configuration of the laser processing apparatus is simplified. can do.

  Therefore, conventionally, a workpiece holding device that puts and holds a workpiece on a swing table supported so as to be swingable so that the posture of the workpiece, which is a workpiece, can be changed during processing has been put into practical use. ing. FIG. 8 shows an example of such a workpiece holding device. This work holding device is configured as a device that holds the sensor case SC when laser bonding is performed.

  A rotating shaft 101a is rotatably supported via two bearings 101 on a base T of the work holding device illustrated in FIG. 8, and a swing table is provided on the rotating shaft 101a. 100 is fixed to be integrally rotatable. The rotation shaft 101 a is connected to the rotation drive device 102 and is rotated by the rotation drive device 102.

  As shown in the side cross-sectional structure of FIG. 9, the swing table 100 is provided with a mounting portion 300 that can move up and down. The upper portion of the mounting portion 300 formed in a mountain shape in cross section is projected to the upper surface side of the swinging table 100 through the through hole 100a in the center of the swinging table 100, and the upper portion of the protruding mounting portion 300 is projected. A recess 303 is formed in accordance with the shape of the lower surface of the sensor case SC. A coil spring (not shown) for biasing the placement unit 300 upward is interposed in a compressed state below the placement unit 300 and placed against the biasing force of the coil spring. An actuator 301 that drives the unit 300 downward is disposed.

  On the other hand, on the upper surface of the swing table 100, a support shaft 202 extends upward, and a cover member 200 is supported so as to be movable in the vertical direction along the support shaft 202. In the center of 200, an opening 200a corresponding to the laser bonding portion of the sensor case SC placed on the recess 303 of the placement portion 300 is formed. A driving mechanism 203 and an actuator 201 for driving the cover member 200 in the vertical direction are fixed to the upper end of the support shaft 202.

  In the workpiece holding device configured as described above, the cover member 200 is driven downward by the actuator 201 while the sensor case SC is placed on the recess 303 of the placement unit 300, and the biasing force of the coil spring is used. Then, the placement unit 300 is pushed upward. Thereby, the sensor case SC is held in a state of being sandwiched by the mounting portion 300 and the cover member 200 from above and below. In this state, the position of the sensor case SC held by the rotation table 100 is rotated by the rotation driving device 102, and the laser light irradiation position of the sensor case SC can be changed. It is like that.

  In addition, attachment / detachment of the sensor case SC with such a workpiece holding device is performed in a state where the placement unit 300 is moved downward by the actuator 301 and the cover member 200 is moved upward by the actuator 201.

  By the way, in such a workpiece holding device, the actuators 201 and 301 that drive the cover member 200 and the mounting portion 300 are fixed to the swing table 100 when holding the sensor case SC and attaching / detaching the sensor case SC. When the swinging table 100 is rotated, a large load is applied to the rotation drive device 102. Further, since the cover member 200, the actuator 201, the support shaft 202, the drive mechanism 203, and the like are present in the space above the swing table 100, the movement of the sensor case SC for attachment / detachment is hindered. .

  It is also conceivable that the cover member 200 is detachable from the swing table 100 and is temporarily removed from the swing table 100 when the sensor case SC is attached or detached. In this case, since the upper part of the swing table 100 is opened by removing the cover member 200, the sensor case SC can be easily moved during attachment / detachment. Must be removed and attached, which makes the attaching / detaching operation very complicated. Further, if it is intended to automate the attaching / detaching operation, a separate transport unit for transporting the cover member 200 must be provided, and the configuration of the entire work holding device becomes large and complicated. Furthermore, since the transport unit for such a cover member is arranged above the work holding device, there is a possibility that the problem that it restricts the movement space of the sensor case SC may occur.

  In the workpiece holding device configured to hold and hold the workpiece from above and below on the swing table supported in such a manner as to be swingable, the work exchange efficiency and the drive load of the swing table are increased. As a result, the complexity and size of the apparatus has been inevitable. Such a problem is a problem that is generally common to work holding apparatuses having a similar structure that are intended to hold a work other than the sensor cover SC.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a workpiece holding device capable of easily attaching and detaching a workpiece while suppressing an increase in the weight of the swing table.

To achieve these objectives, the invention described in claim 1, and a cover member mounting portion and covering the upper to be placed in the work on the upper surface of the swing table that is swingably supported by the base In the provided work holding device, the work holding device is disposed so as to face the swing table so as to be able to reciprocate linearly in a direction approaching and separating from each other, and covers the upper portion of the mounting portion according to the proximity to each other, and The cover member is divided and formed on the first and second cover members that are retracted from above the mounting portion by being separated from each other, and the first and second cover members are pressed by pressing in one direction. The first and second cover members are simultaneously moved in directions close to each other, and simultaneously moved away from each other by pressing from one direction.

  In the above-described configuration, the first and second cover members are moved in directions close to each other through pressing from one direction, and the upper portion of the placement portion is covered. Similarly, through the pressing from one direction, the first and second cover members are moved away from each other and retracted from above the placement portion. In other words, in the above configuration, both the opening and closing (the opening operation and the closing operation of the cover) above the placement unit can be performed through pressing from one direction. Such pressing can be applied without mechanically connecting the cover member and the drive source together. For this reason, a drive source is provided outside the swinging rocking table so that opening above the mounting part for attaching and detaching the work and closing above the mounting part for holding the work are easily and accurately performed. Will be able to.

In order to achieve the above object, according to the second aspect of the present invention, a swing table supported swingably on a base, and a work is placed on the upper surface of the swing table supported by the swing table. The first and second linear motion guide mechanisms that are supported by the swinging table and extended in the same direction, respectively, and the first and second support members are disposed opposite to each other on the swinging table. The first and second cover members guided so as to be reciprocally movable toward and away from the second linear motion guide mechanism, and cover the upper portion of the placement unit by being close to each other; Displacement on the linear motion guide mechanism of the first and second cover members retracted from above the placement portion by being separated from each other, and one of the first and second cover members Depending on the other cover member Serial manner to displace in the opposite direction on the linear guide mechanism, and further comprising a connecting mechanism for mechanically connecting the first and second cover member.

  In the above configuration, the cover member that covers the upper portion of the mounting portion is divided and formed into two first and second cover members that are arranged so as to be movable in directions close to and away from each other. When one of the first and second cover members is moved away from the other, the other cover member is also moved away from the one cover member in conjunction with the transmission of force through the coupling mechanism. It moves in a direction, and the upper part of a mounting part comes to be open | released. Further, when the one cover member is moved in the direction close to the other cover member, the other cover member is also moved in the direction close to the one cover member in conjunction with the transmission of the force through the coupling mechanism. Thus, the upper portion of the placement portion is closed. That is, in the above-described configuration, both the cover members for opening and closing above the placement portion can be moved together only by moving one of the cover members.

  Any movement of the cover member related to opening and closing (opening / closing of the cover) above the placement portion can be performed only by applying external pressure. For this reason, a drive source is provided outside the swinging rocking table, so that the cover for attaching / detaching the workpiece and holding the workpiece can be opened and closed easily and accurately.

  Also, in such a work holding device according to claim 2, the invention according to claim 3 is characterized in that the first and second pressed parts integrally provided on the first and second cover members, respectively, An actuator for moving the part forward and backward, and when the swinging table is positioned at a predetermined swinging position for attaching and detaching the workpiece, the advancing and retreating direction of the pressing part is the linear motion of the first linear motion guide mechanism Similarly to the first actuator supported by the base so that the first pressed portion is positioned in the same direction as the guide direction and forward in the forward direction of the pressing portion, the pressing portion is also moved forward and backward. An actuator, wherein when the swing table is positioned at a predetermined swing position for attaching / detaching the workpiece, the advancing / retreating direction of the pressing portion is the same direction as the linear guide direction of the second linear guide mechanism And before The second pressed portion in the forward direction in front of the pressing portion is a second actuator supported by the base so as to be positioned, and further comprising a. If the work holding device is configured in this way, the actuator disposed fixedly outside the swing table is used to open the upper part of the mounting part for attaching and detaching the work and the upper part of the mounting part for holding the work. It becomes possible to drive both cover members related to the closing.

  Furthermore, in the work holding device according to claim 3, in the invention according to claim 4, the pressing direction of the first actuator and the pressing direction of the second actuator are set to be the same direction. If the workpiece holding device is configured in this manner, both the first and second actuators can be installed on the same side of the swing table, so that the installation property of the workpiece holding device can be improved.

  According to a fifth aspect of the present invention, the connecting member has a gear groove formed on one side thereof, and is extended in the linear motion guide direction of the first linear motion guide mechanism to be the first cover member. A first rack fixed integrally with the first rack, and a gear groove facing the gear groove of the first rack is formed on one side thereof, and extends in the linear motion guide direction of the second linear motion guide mechanism A second rack integrally fixed to the second cover member, and rotatably supported by the swing table, and interposed between the first and second racks. And a pinion gear having gear teeth meshed with the respective gear grooves on the outer periphery.

  Moreover, in the workpiece holding device according to any one of claims 2 to 5, as described in claim 6, the mounting portion is arranged in a direction close to the first and second cover members and the same. An elastic member that is supported by the swing table so as to be reciprocable in a direction away from the first and second cover members, and that generates an elastic force that urges the mounting portion in the approaching direction; If it does so, the state which clamped the workpiece | work between the 1st and 2nd cover member and the mounting part upper surface will be continued, without the operation from the outside.

  Further, as described in claim 7, the cam follower supported by the base so as to be capable of moving forward and backward, an actuator that presses the cam follower in the forward direction, and the mounting portion are provided integrally, and And a cam that is engaged with the cam follower and displaces the mounting portion in the direction of separating in accordance with the advancement of the cam follower. It becomes possible to cancel the application of the elastic force of the elastic member for holding. Thus, it is possible to easily and accurately attach and detach the workpiece. Also in this case, since the application of such elastic force can be canceled only by applying external pressure, an actuator for that purpose can be disposed outside the swing table.

  In addition, as described in claim 8, the mounting portion and the cam are integrally connected when the swing table is located at a predetermined swing position for attaching and detaching the workpiece, and the swing table Can be released from the elastic force without causing the actuator to swing together with the swinging table, so that the actuator is swingable integrally with the swinging table. An increase in the weight of the swing table can be suppressed.

  Hereinafter, an embodiment of a work holding device according to the present invention will be described with reference to FIGS. The workpiece holding device according to the present embodiment is configured as a device that holds the sensor case SC as the workpiece when the laser bonding of the sensor case SC (FIG. 7) is performed, similar to the conventional workpiece holding device described above. Yes.

  FIG. 1 shows a side structure of a work holding device according to the present embodiment. As shown in FIG. 1, a bearing 11 that rotatably supports a rotating shaft 11a is fixed to an upper surface of a base T that is supported on a floor surface by a support leg T1. The swing table 10 is fixed to the rotation shaft 11a so as to be integrally rotatable. One end (right end in the figure) of the rotation shaft 11a is provided with a connecting portion 11b that can be connected to a rotation driving device (not shown) that drives the swing table 10 to rotate.

  Two linear rails 41a extending in parallel are fixed to the upper surface of the swing table 10, and two moving blocks 41b and 41c are mounted on each rail 41a so as to be capable of reciprocating linearly along the rail 41a. Has been. A first cover member 20a is fixed to the moving block 41b, and a second cover member 20b is fixed to the moving block 41c so as to be reciprocally movable. The first and second cover members 20a and 20b are disposed opposite to each other on the swing table 10, and are guided along the rail 41a so as to be reciprocally movable toward and away from each other. It is like that. The first and second cover members 20a and 20b are formed with an opening 21 for exposing the sensor case SC to be held. The inner peripheral wall of the opening 21 has an inclined surface that is inclined so that the opening 21 expands toward the upper side, which is the irradiation direction of the laser light, in order to avoid partial shielding of the laser light irradiated to the sensor case SC. Has been.

  FIG. 2 shows a top structure of the work holding device. As shown in FIG. 2, both sides of the first cover member 20a in the vertical direction in the drawing are extended in the linear motion guide direction of the rail 41a, and a gear groove 43a is formed on the inner side surface of the cover member 20a. The rack 43 formed with is fixed integrally by bolting. Similarly, the second cover member 20b is extended in the linear motion guide direction of the rail 41a on both sides in the vertical direction in the figure, and is opposed to the gear groove 43a of the rack 43. A rack 44 having a gear groove 44a formed on the outer side surface is fixed integrally by bolting. Between the racks 43 and 44, a pinion gear 45 having gear teeth meshed with the gear grooves 43a and 44a of the racks 43 and 44 on the outer periphery is rotatable to the swing table 10. It is arrange | positioned in the state supported by.

  On the other hand, air cylinders 49a and 49b fixed to the upper surface of the base T are provided on the right side of the racks 43 and 44, respectively. Each of the air cylinders 49a and 49b includes pressing portions 70a and 70b that move forward toward the swing table 10 and move backward toward the side away from the swing table 10. These air cylinders 49a and 49b are pressed when the swing table 10 is positioned at a rotational position where the upper surface is horizontal (hereinafter, this rotational position is referred to as a workpiece attaching / detaching rotational position). It arrange | positions so that the base end parts 43b and 44b of the racks 43 and 44 may be located ahead of the advancing direction of the parts 70a and 70b. That is, the air cylinder 49a can press the base end portion 43b of the rack 43 to the left in the drawing by the pressing portion 70a when the swing table 10 is located at the workpiece attaching / detaching rotation position. Further, the air cylinder 49b can press the base end portion 44b of the rack 44 to the left in the drawing by the pressing portion 70b when the swing table 10 is similarly positioned at the workpiece attaching / detaching rotation position.

  FIG. 3 shows a cross-sectional structure of the work holding device taken along line A3-A3 of FIG. As shown in FIG. 3, a mounting portion 30 is loosely fitted in a substantially rectangular recess 10a formed in the center of the upper surface of the swing table 10 so as to be movable in the vertical direction. The upper portion of the mounting portion 30 is formed in a mountain shape in cross section, and a concave portion 33a is formed on the upper surface thereof, following the lower surface shape of the sensor case SC. In addition, as indicated by broken lines in FIG. 3, four concave portions 30a having a circular cross section are formed on the lower surface of the mounting portion 30, and each concave portion 30a includes the upper surface of the concave portion 30a and the above-described shaking. The coil springs 30b are accommodated in a compressed state sandwiched between the bottom surface of the recess 10a of the moving table 10. Note that two circular pillars 32 a and 32 b having a circular cross section are fixed to the lower surface of the mounting portion 30. These struts 32 a and 32 b pass through a hole 34 formed in the bottom surface of the recess 10 a of the swing table 10 and protrude below the swing table 10, and their lower ends are fixed to the base 31. Has been. A rod 35 extending downward is fixed to the pedestal 31, and a roller 36 is rotatably supported at the lower end portion of the rod 35.

  FIG. 4 shows a side structure of the lower part of the base T of the work holding device. As shown in FIG. 4, a linear guide mechanism 71 including a rail 71a and a moving block 71b is fixed to the floor G on which the support legs T1 and T2 of the base T are placed, and on the moving block 71b, the linear guide mechanism 71 is fixed. The cam plate 53 is fixed. The cam plate 53 is connected to an air cylinder 54 and is reciprocated linearly along the rail 71a by the air cylinder 54. The cam plate 53 has a guide groove 53a. The guide groove 53a is formed as a long hole whose left side in the figure is inclined upward. The cam roller 52a engaged with the guide groove 53a is rotatably supported at the lower end of the rod 52 supported by the support portion 72 fixed to the floor G so as to be movable in the vertical direction. A substantially U-shaped engaging portion 51 is formed at the upper end of the rod 52. When the swing table 10 is located at the workpiece attaching / detaching position, the rod 52 is rotatably supported at the lower end portion of the rod 35. The roller 36 is engaged.

Next, the attachment / detachment aspect of the sensor case SC in the work holding device configured as described above will be described.
First, the swing table 10 is rotated to the mounting / demounting position, and the cam plate 53 is pressed to the left in the figure by the air cylinder 54 with the roller 36 engaged with the engaging portion 51. Accordingly, the cam roller 52a engaged with the guide groove 53a of the cam plate 53 is pushed down along the guide groove 53a. As a result, the rod 52 provided with the cam roller 52a and the rod 35 connected to the rod 52 through the engagement of the engaging portion 51 and the roller 36 are integrally moved downward. When the rod 35 moves downward in this way, the mounting portion 30 connected to the upper end of the rod 35 is forcibly pushed down against the urging force of the coil spring 30b.

  Thereafter, as shown in FIG. 5 (a), the base cover 44b of the rack 44 fixed to the first cover member 20a is pressed to the left in the drawing by the air cylinder 49b. The member 20a is moved to the left in the figure. The movement of the first cover member 20a and the rack 44 at this time causes the pinion gear 45 meshed with the gear groove 44a of the rack 44 to rotate, and the rack 43 meshed with the gear groove 43a engages with the pinion gear 45. Together with the second cover member 20b, it moves to the right in the figure. As a result, the first and second cover members 20a and 20b are moved away from each other, and the first and second cover members 20a and 20b are retracted from above the mounting portion 30. It becomes. In this way, the upper part of the concave portion 33a of the placement portion 30 is opened, and the sensor case SC is conveyed and placed in the concave portion 33a of the placement portion 30 by a conveying device (not shown).

  Next, as shown in FIG. 5 (b), the air cylinder 49a presses the base end portion 43b of the rack 43 fixed to the second cover member 20b to the left in the drawing, thereby The cover member 20b is moved to the left in the figure. By the movement of the second cover member 20b and the rack 43 at this time, the pinion gear 45 engaged with the gear groove 43a of the rack 43 rotates in the opposite direction to the previous direction, and the pinion gear 45 has the gear groove 43a of the gear groove 43a. The meshed rack 44 moves to the right in the figure together with the first cover member 20a. As a result, the first and second cover members 20a and 20b move in the directions close to each other, and the first and second cover members 20a and 20b are placed in the concave portion 33a of the placement portion 30. The upper side of the sensor case SC is covered.

  Subsequently, by releasing the pressing of the cam plate 53 by the air cylinder 54, the forced depression of the mounting portion 30 is released. As a result, the mounting portion 30 is pushed upward by the biasing force of the coil spring 30b, and is sandwiched between the concave portion 33a of the mounting portion 30 and the first and second cover members 20a, 20b. Thus, the sensor case SC is held.

  After holding the sensor case SC in this manner, the laser table is joined to the sensor case SC while the swing table 10 is rotated about the rotation shaft 11a and the laser beam irradiation position is appropriately changed. Then, the removal of the sensor case SC after laser bonding is performed in the same manner as in the above attachment. That is, after the rocking table 10 is rotated to the above-described attachment / detachment position, the cam plate 53 is pressed by the air cylinder 54 to forcibly push the mounting portion 30 downward. Further, the air cylinder 49b presses the base end portion 44b of the rack 44 to the left in the figure, and the first and second cover members 20a and 20b are moved away from each other, so that the sensor case SC is mounted. It retracts | saves from the upper direction of the recessed part 33a of the mounting part 30 made. Thus, the sensor case SC after laser joining is removed by picking up and carrying out the sensor case SC from above the opened placement unit 30 by a transport device (not shown).

  In this embodiment, the rail 41a and the moving block 41b serve as the first linear motion guide mechanism, and the rail 41a and the movable block 41c serve as the second linear motion guide mechanism, and the racks 43 and 44, the pinion gear 45, and the like. Thus, each of the connecting mechanisms is configured. The first and second pressed parts are constituted by the base end parts 43b and 44b of the racks 43 and 44, and the elastic member is constituted by the coil spring 30b. The work attaching / detaching rotation position corresponds to the above-mentioned “predetermined swinging position for attaching / detaching the work”.

According to the embodiment described above, the effects listed below can be obtained.
(1) In the above embodiment, the cover opening operation when the sensor case SC is attached and detached and the cover closing operation when the sensor case SC is held are both viewed from one direction by the air cylinders 49a and 49b outside the swing table 10. This can be done by applying a pressure. Therefore, the sensor case SC can be easily attached and detached while suppressing an increase in the weight of the swing table 10 itself.

  (2) In the above embodiment, the pressing direction of the air cylinder 49b against the first cover member 20a related to the cover opening operation and the pressing direction of the air cylinder 49a against the second cover member 20b related to the cover closing operation are set. The same direction. Therefore, both the air cylinders 49a and 49b can be arranged on the same side of the swing table 10, and the workability of the work holding device can be improved.

  (3) In the above embodiment, the downward movement of the mounting portion 30 for releasing the application of the elastic force of the coil spring 30b related to the holding of the sensor case SC is also performed from one direction by the air cylinder 54. It can be performed only by applying pressure. Therefore, the attachment / detachment of the sensor case SC can be automated without increasing the weight of the swing table 10 itself.

In addition, the said embodiment can also be changed and implemented as follows.
The base T in the above embodiment may be configured as a movable base that can be moved, for example, a rotary table that can rotate around the support leg T1. In this case, when the base T is positioned at a specific position for attaching and detaching the workpiece, the base end portions 43b and 44b of the racks 43 and 44 and the pressing portions 70a and 70b of the air cylinders 49a and 49b as described above. If the positional relationship is established, the sensor case SC can be easily attached and detached while suppressing an increase in the weight of the swing table 10 itself. That is, when the swing table 10 is positioned at the workpiece attaching / detaching rotation position at the specific position, the base end portions 43b and 44b of the racks 43 and 44 are advanced by the pressing portions 70a and 70b of the air cylinders 49a and 49b. If the arrangement is positioned forward in the direction, the first and second cover members 20a and 20b can be opened and closed by an actuator outside the swing table 10.

  In the above embodiment, the first and second cover members of the mounting portion 30 when the sensor case SC is attached / detached by the mechanism including the cam plate 53, the cam roller 52a, the air cylinder 54, the rod 52, the coil spring 30b, and the like. The pressing to 20a and 20b and the release of the pressing were performed. The structure of the mechanism related to such pressing and release thereof is not limited to this, and can be implemented with appropriate changes. For example, in the above embodiment, the cam plate 53 and the cam roller 52a are used to convert the pressure in the horizontal direction of the air cylinder 54 into the force for forcibly lowering the mounting portion 30. If it is possible to secure a lower installation space, the air cylinder 54 may be directly connected to the rod 52 to directly lower the mounting portion 30. In the above embodiment, the rod 52 provided with the cam roller 52a is integrally connected to the mounting portion 30 only when the swing table 10 is located at the workpiece attaching / detaching rotation position. The air cylinder 54 can be disposed outside the swing table 10. However, the air cylinder 54 may be fixed to the swing table 10 when an increase in the weight of the air cylinder 54 is not particularly problematic. In addition to the coil spring 30b, the elastic member that urges the mounting portion 30 toward the first and second cover members 20a and 20b is not limited to the coil spring 30b, but other springs such as leaf springs or other elastic members such as rubber. May be adopted. In place of such an elastic member, an actuator such as an air cylinder may be used to generate a pinching force for holding the sensor case SC. Furthermore, the elastic member and the actuator may be omitted if the sensor case SC can be held without applying a holding force.

  In the above embodiment, the rack and pinion mechanism including the racks 43 and 44 and the pinion gear 45 moves the first and second cover members 20a and 20b in conjunction with each other. Instead of this, another mechanical linkage may be adopted. In short, if it is a connecting mechanism that mechanically drives and connects the first and second cover members 20a and 20b so as to displace the other cover member in the opposite direction according to the displacement of one cover member. Instead of a rack and pinion mechanism, it can be employed. For example, FIGS. 6A and 6B show an example of a configuration in which both cover members 20a and 20b are moved in conjunction with each other using a belt mechanism. Two pulleys 85a and 85b around which the belt B is wound are provided on both sides of the first and second cover members 20a and 20b on the upper surface of the swing table 10 of the workpiece holding mechanism illustrated in FIG. Two pivotally supported. A rod 84 integrally fixed to the first cover member 20a is fixed to the inner periphery side of the belt B, and a rod 83 fixed to the second cover member 20b is fixed to the outer periphery side. Yes. The base end portions 83b and 84b of the rods 83 and 84 are pressed portions that receive pressure from the air cylinders 49a and 49b. In such a workpiece holding device, as shown in FIG. 5B, when the first cover member 20a is moved to the left in the drawing by pressing the proximal end portion 84b of the rod 84 by the air cylinder 49b, the belt B Through this travel, the second cover member 20b moves in conjunction with the right side in the figure, and both cover members 20a, 20b are simultaneously retracted from above the placement portion 30. Further, when the base end portion 83b of the rod 83 is pressed by the air cylinder 49a, the cover members 20a and 20b are similarly moved in a direction approaching each other and cover the upper portion of the mounting portion 30.

In place of the air cylinders 49a, 49b, 54 in the above embodiment, other direct acting actuators such as hydraulic cylinders may be employed.
The present invention can be similarly applied to work holding devices having different swinging modes of the swing table, such as a work holding device in which the swing table 10 is supported by the base T so as to be rotatable about two or more axes. it can.

  The workpiece holding device according to the present invention can be embodied as a workpiece holding device that holds a workpiece other than the sensor cover SC.

The side view which shows the side structure about one Embodiment of the workpiece holding apparatus concerning this invention. The top view of the workpiece holding apparatus of the said embodiment. Sectional drawing which shows the cross-section of the workpiece holding apparatus in the A3-A3 line of FIG. The side view which shows the side structure of the base lower part of the workpiece holding apparatus in the said embodiment. (A) And (b) is a top view which shows operation | movement of the workpiece holding apparatus of the said embodiment. (A) And (b) is a top view of the workpiece | work holding | maintenance apparatus which shows the connection mechanism in another embodiment different from the said embodiment. (A) And (b) is a figure which shows an example of the manufacture aspect of resin-made sensor cases by laser joining. The perspective view which shows the whole structure about the conventional workpiece holding apparatus. The figure which shows the side surface cross-section of the conventional workpiece holding apparatus.

Explanation of symbols

  T: base, 10: swing table, 10a: recess, 11: bearing, 11a: rotating shaft, 11b: connecting portion, 20a ... first cover member, 20b ... second cover member, 21 ... opening, 30: Placement part, 30a: Recess, 30b ... Coil spring, 31 ... Pedestal, 32a, 32b ... Post, 33a ... Recess, 34 ... Hole, 35 ... Rod, 36 ... Roller, 41a ... Rail, 41b, 41c ... Movement Block, 43, 44 ... Rack, 43a, 44a ... Gear groove, 43b, 44b ... Base end, 45 ... Pinion gear, 49a, 49b ... Air cylinder, 51 ... Engagement part, 52 ... Rod, 52a ... Cam roller, 53 ... Cam plate, 53a ... Guide groove, 54 ... Air cylinder, 70a, 70b ... Pressing part, 71 ... Linear guide mechanism, 71a ... Rail, 71b ... Movement block, 72 ... Support part, 83,84 Rod, 83b, 84b ... Base end portion, 85a, 85b ... Pulley, 100 ... Swing table, 100a ... Through hole, 101 ... Bearing, 101a ... Rotary shaft, 102 ... Rotation drive device, 200 ... Cover member, 200a ... Opening, 201 ... actuator, 202 ... support shaft, 300 ... mounting portion, 301 ... actuator, 302 ... support shaft, 303 ... recess, 304 ... coil spring, B ... belt, G ... floor surface, T ... base, SC ... sensor case, T1, T2 ... support legs.

Claims (8)

In a work holding device in which a placement part on which a work is placed and a cover member that covers the upper part of the work table are provided on an upper surface of a swing table that is swingably supported by a base.
It is arranged opposite to the swing table so as to be able to reciprocate linearly in the direction of approaching and separating from each other, and covers the upper part of the mounting unit according to the proximity of each other and is spaced apart from each other. Dividing the cover member into first and second cover members that are retracted from above the portion;
In addition, the first and second cover members are simultaneously moved in directions close to each other by pressing from one direction, and the first and second cover members are simultaneously moved away from each other by pressing from one direction. To move it,
A workpiece holding device. A swing table which is swingably supported by the base,
A placement unit that is supported by the swing table and on which the workpiece is placed;
First and second linear motion guide mechanisms respectively supported by the swing table and extended in the same direction;
The first and second cover members are arranged opposite to each other on the swing table and are guided so as to be able to reciprocate in directions close to and away from the first and second linear motion guide mechanisms, respectively. The first and second cover members that cover the upper portion of the mounting portion by being close to each other and retreat from the upper portion of the mounting portion by being separated from each other;
In response to the displacement of one of the first and second cover members on the linear motion guide mechanism, the other cover member is displaced in the reverse direction on the linear motion guide mechanism. A coupling mechanism for mechanically coupling the first and second cover members;
A workpiece holding device comprising: The work holding apparatus according to claim 2,
First and second pressed parts integrally provided on the first and second cover members, respectively;
An actuator for moving the pressing portion forward and backward, and when the swinging table is positioned at a predetermined swinging position for attaching and detaching a workpiece, the advancing / retreating direction of the pressing portion is a straight line of the first linear motion guide mechanism. A first actuator supported by the base so that the first pressed portion is positioned in the same direction as the movement guide direction and forward of the pressing portion in the forward direction;
Similarly, an actuator for moving the pressing portion forward and backward, and when the swinging table is positioned at a predetermined swinging position for attaching and detaching the workpiece, the advancing / retreating direction of the pressing portion is the second linear motion guide mechanism. A second actuator supported by the base so that the second pressed portion is positioned in the same direction as the linear motion guide direction and forward of the pressing portion in the forward direction.
A work holding apparatus, further comprising:   The work holding apparatus according to claim 3, wherein the pressing direction of the first actuator and the pressing direction of the second actuator are the same direction. The coupling mechanism is
A first rack having a gear groove formed on one side thereof and extending in a linear motion guide direction of the first linear motion guide mechanism and integrally fixed to the first cover member;
A gear groove facing the gear groove of the first rack is formed on one side thereof, and extended in the linear motion guide direction of the second linear motion guide mechanism to be integrally fixed to the second cover member. A second rack,
A pinion gear that is rotatably supported by the swing table and has gear teeth formed between the first and second racks and meshed with the gear grooves of both racks on the outer periphery;
The work holding device according to any one of claims 2 to 4, comprising: The mounting portion is supported by the swing table so as to be able to reciprocate in a direction close to the first and second cover members and in a direction away from the first and second cover members. The work holding apparatus according to claim 2, further comprising an elastic member that generates an elastic force that urges a portion in the approaching direction. A cam follower supported by the base so as to be capable of moving forward and backward;
An actuator for pressing the cam follower in the forward direction;
A cam that is provided integrally with the mounting portion and that is engaged with the cam follower to displace the mounting portion in the separating direction in accordance with the advancement of the cam follower;
The work holding apparatus according to claim 6, further comprising:   The mounting portion and the cam are integrally connected when the swing table is positioned at a predetermined swing position for attaching and detaching the workpiece, and when the swing table is positioned at another swing position. The workpiece holding device according to claim 7, which is separated from each other.

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