JP3119571B2 - Transfer press work transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work transfer apparatus for sequentially transferring works to work stations arranged in one direction in a transfer press.

[0002]

2. Description of the Related Art Conventionally, a work transfer device provided in a transfer press has a pair of right and left transfer bars.
The work is moved up and down and in the longitudinal direction thereof while gripping the work from the left and right with the fingers (work gripping portions) provided on both the transfer bars, thereby moving the work in a predetermined transfer direction (longitudinal direction of the transfer bar). Is generally transferred to each station along the route. In this device,
One cycle is completed by sequentially performing the clamp operation, the ascending operation, the feed operation, the descending operation, the unclamping operation, and the return operation as shown in FIG. 8, and each work is replaced with the next work. It will be transported to the station.

In this apparatus, since a long and heavy transport bar must perform all the operations of (1) and (2), the required power is large, and the device for driving the apparatus is also large, and the initial cost and the cost are increased. There is a disadvantage that running costs are high. Accordingly, Japanese Patent Application Laid-Open No.
Japanese Patent No. 29 proposes an arrangement in which actuators are provided at a plurality of positions on both transport bars to move each finger up and down with respect to the transport bar and to move the fingers in a clamping direction.

FIG. 9 shows an outline of this apparatus. An elevating drive device 90 for elevating the rack shaft 91 is installed on the ground, and both ends of a long transport bar (frame body in the publication) 92 are fixed to the upper end of the rack shaft 91. Sprockets 93 are provided at both ends of the transport bar 92, and a plurality of underframes 95 are fixed to a chain 94 hooked between the two sprockets 93. By rotating the sprocket 93, all underframes 95 are simultaneously moved in the feed direction. It is designed to be driven. A fluid pressure cylinder 96 is provided on each underframe 95, and a finger 98 for gripping a work is provided at a tip of a rod 97 of each fluid pressure cylinder 96.

According to this apparatus, the two transport bars 92 need only be raised and lowered, and the work clamping operation and the feed lifting operation can be performed by driving the sprocket 93 and operating the fluid pressure cylinders 96.

[0006]

In the apparatus disclosed in the above publication,
Rack shafts 9 are provided at both ends of the transport bar 92 which is long and has low bending rigidity.
1 is fixed, and the entirety of the transport bar 92 is moved up and down by driving the rack shafts 91. When the transport bar 92 starts to ascend, its inertia force is applied as shown by a two-dot chain line in FIG. The intermediate portion of the transport bar 92 is bent downward, and conversely, when the transport bar 92 starts to descend, FIG.
As shown in (1), the intermediate portion of the transport bar 92 bends upward. When such bending occurs, each finger 98
The workpiece clamped on the
In particular, when the bending is remarkable, there is a possibility that the clamp itself becomes impossible and the work falls off. In order to prevent such deformation and dropping of the work, the transfer bar 92
It is only necessary to reduce the lifting speed, but the time required for transport is accordingly increased, and the efficiency is reduced.

[0007] Further, since this apparatus still raises and lowers the entire heavy transport bar 92, a large amount of power is required.

SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide a transfer press work transfer device capable of transferring a work quickly with a small amount of power while preventing the work from being deformed or dropped during elevating.

[0009]

As a means for solving the above problems, the present invention relates to a work transfer device for a transfer press for sequentially transferring works to a plurality of work stations arranged in one direction. A support member provided on both sides of the work station and extending in parallel with the direction in which the workstations are arranged; a feed moving member extending in the same direction as the support member and supported by the support member so as to be movable in the longitudinal direction; Feed driving means for moving the feed moving member, a plurality of elevating members arranged in parallel in the direction in which the workstations are arranged, and supported by the feed moving member so as to be able to move up and down, and moving each elevating member with respect to the feed moving member A lifting drive means for raising and lowering, and a lifting means supported by each lifting member so as to be movable toward and away from the work station; A plurality of clamp moving members having a work gripping portion for gripping the workpiece, and clamp driving means for moving each of the clamp moving members with respect to the elevating member. As the feed moving member, the elevating member can be raised and lowered. A plurality of elevating support members to be supported are intermittently arranged in the direction in which the workstations are arranged and supported by the support members, and the elevating support members are connected to each other via a connecting member in the direction in which they are arranged. (Claim 1).

The elevating drive means includes an elevating drive transmitting shaft extending in the direction in which the workstations are arranged, an elevating drive source for rotating the elevating drive transmitting shaft, and an elevating member for rotating the elevating drive transmitting shaft. It is preferable that the apparatus includes a lifting / lowering conversion mechanism that converts the movement into a vertical movement (claim 2).

The up-down conversion mechanism includes a gear fixed to the up-down drive transmission shaft, and a rack extending in the up-down direction and supported by the feed moving member so as to be able to move up and down. It is preferable that the rack is engaged with the lifting member fixed to the upper end of the rack (claim 3).

Further, an auxiliary gear meshing with the gear is rotatably supported by a feed moving member, and a rack different from the rack is meshed with the auxiliary gear so that the upper end of the former rack and the upper end of the latter rack are connected. It is more preferable to fix to a common elevating member (claim 4).

The clamp drive means includes a clamp drive transmission shaft extending in the direction in which the work stations are arranged, a clamp drive source for rotationally driving the clamp drive transmission shaft, and a clamp drive transmission shaft for rotating the clamp drive transmission shaft. It is preferable that the apparatus further includes a clamp conversion mechanism that converts the movement of the member toward and away from the work station.

[0014] The clamp conversion mechanism includes a first mechanism extending vertically and rotatably supported by the feed moving member.
A rotation transmission shaft, a first transmission mechanism that converts the rotation of the clamp drive transmission shaft into a rotation of the first rotation transmission shaft, and integrated with the first rotation transmission shaft coaxially with the first rotation transmission shaft. A second rotation transmission shaft connected to the second rotation transmission shaft and the clamp moving member, the second rotation transmission shaft being connected to the clamp movement member, and rotating the second rotation transmission shaft by the clamp movement member. And a second transmission mechanism for converting the movement into a direction in which the work station moves toward and away from the work station (claim 6).

As the first rotation transmission shaft and the second rotation transmission shaft, it is preferable that one of the first and second rotation transmission shafts is formed into a cylindrical shape and the other is fitted inside thereof, and the fitting cross section is formed into a modified cross section. (Claim 7).

[0016]

According to the apparatus of the first aspect, the work can be transported in the following procedure.

The clamp moving member supported by each of the right and left elevating members is moved in a direction approaching the work station, and the work is grasped from both sides by the work grasping portions provided on the clamp moving member.

The work is picked up from the current work station by raising each elevating member with respect to the feed moving member in the clamped state.

By moving the feed moving member in the feed direction along the support member, all the lifting members, all the clamp moving members, and each work are integrally moved in the same direction.

The work is set on the next work station by lowering each elevating member.

The work is released from each work gripper, and each clamp moving member is moved in a direction away from the work station, thereby moving the work gripper away from each work.

The feed moving member is moved in the return direction along the support member to prepare for the next work conveyance.

Therefore, according to this apparatus, the operation of raising and lowering the entire long transport bar as in the prior art is unnecessary, and the workpiece can be transported quickly with little power and without causing the workpiece to deform or fall off. it can.

Further, as the feed moving member, a plurality of elevating and lowering support members are intermittently arranged, and these are connected to each other by a connecting member, so that the entire feed moving member is formed into a single member and has a uniform sectional shape. The weight of the entire feed moving member is reduced as compared with the case in which it is performed. In addition, since each lifting support member is supported by the support member, the support rigidity of the entire feed moving member is sufficiently secured.

In the apparatus according to the second aspect, the rotational movement of the vertical drive transmission shaft by the vertical drive source is converted into the vertical movement of each vertical member, thereby performing the vertical movement of the workpiece. That is, a single lifting drive can drive all the lifting members in a row at the same time.

More specifically, in the device according to the third aspect,
With the rotation of the lifting drive transmission shaft, the rack meshing with each gear on the lifting drive transmission shaft side moves up and down, and the lifting member fixed to this rack moves up and down.

Further, in the apparatus according to the fourth aspect, with the rotation of the gear meshing with the rack, the auxiliary gear meshing with the gear also rotates, and the rack meshed with the auxiliary gear moves up and down. That is, the former rack and the latter rack move up and down at the same time, and the racks to which these racks are fixed in common move up and down while being supported in a more stable state.

According to a fifth aspect of the present invention, the rotation of the clamp drive transmission shaft by the clamp drive source causes the rotational motion of the clamp drive transmission shaft to move in the direction in which each clamp moving member moves toward and away from the work station. , Whereby the clamping operation and the unclamping operation are performed. That is, all the clamp moving members in a row can be simultaneously moved toward and away from the workstation by a single clamp driving source.

More specifically, according to the apparatus of the sixth aspect, with the rotation of the clamp drive transmission shaft, this rotational movement is converted into the rotational movement of the first rotation transmission shaft, and the first rotation transmission shaft is rotated. , The second rotation transmission shaft also rotates. And
The rotation of the second rotation transmission shaft is converted into a movement of the clamp moving member in a direction of moving toward and away from the work station, and a clamping operation and an unclamping operation are performed.

When the elevating member moves up and down, the first rotation transmission shaft and the second rotation transmission shaft relatively move in the vertical direction. For example, in the device according to the seventh aspect, the two rotation transmission shafts move up and down relative to each other while being fitted to each other.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

The transfer press shown in FIG. 2 has a plurality of work stations 10 arranged in one direction, and support members 12 are installed on both sides of the work stations 10. The two support members 12 extend in the direction in which the workstations 10 are arranged, and in this embodiment, have a substantially U-shaped cross section having a bottom wall and left and right side walls as shown in FIG. Rail mounting parts 13 are provided on both side walls,
Guide rails 14 are laid on both rail mounting portions 13.

A plurality of lifting support members 16 are supported on the guide rail 14 so as to be movable in the longitudinal direction (ie, the direction in which the workstations 10 are arranged). These lifting support members 16 are connected to the guide rails 14.
Are vertically intermittently arranged in the longitudinal direction, and the lifting support members 16 are connected to each other via connection rods (connection members) 18.

A driven block 20 is supported at the end of the guide rail 14, and is connected to the driven block 20 via a connecting rod 18 and a joint 22.
The elevating support member 16 adjacent to 0 is connected.

As shown in FIGS. 3 and 4, a rack 24 extending parallel to the guide rails 14 is fixed to the lower surface of the driven block 20. This driven block 2
A feed drive motor (feed drive means) 28 is supported laterally by a bracket 26 erected on the ground, and a gear 30 fixed to an output shaft 29 of the feed drive motor 28 is provided on the side of 0. It is engaged with the rack 24. Therefore, by the operation of the feed drive motor 28, the driven block 20, the connecting rod 18, and the elevating support member 16 are integrally slidably driven along the guide rail 14.

FIGS. 5 to 7 show the structures of the lifting support members 16 and the vicinity thereof.

Each elevating support member 16 is composed of a horizontally extending substrate 16a and side walls 16b extending downward from both ends of the substrate 16a in the longitudinal direction of the guide rails. Sliders 32 are fixed to the lower surfaces at both ends in the width direction (left-right direction in FIG. 5) of the substrate 16a, and these sliders 32 are fitted to the guide rails 14 so that the lifting support member 1
The whole 6 is slidable along the guide rail 14.

The substrate 16a is provided at a plurality of locations (four locations in the longitudinal direction and the width direction in the illustrated example) of the substrate 16a.
Are fixed, and each bush 34 supports a rack shaft 36 so as to be able to move up and down. A rack 37 is formed in the lower half of each rack shaft 36.

Between the rack shafts 36 arranged in the width direction,
An elevating drive transmission shaft 40 extending parallel to the support member 12 passes therethrough. The lifting drive transmission shaft 40 has a shaft length substantially equal to the longitudinal dimension of the support member 12, is connected to a lifting drive motor (a lifting drive source) 42 (FIG. 6), and is driven to rotate by its operation. Has become. More specifically, as shown in FIG. 2, a fixed block 21 is provided at an end opposite to the driven block 20 and the lifting drive motor 4 is provided near the fixed block 21.
2, the output shaft of the elevation drive motor 42 is connected to the elevation drive transmission shaft 4 via a drive transmission mechanism attached to the fixed block 21 and a spline mechanism.
Connected to 0.

An intermediate portion of the elevating drive transmission shaft 40 is supported by a side wall 16b of each elevating support member 16 via a bearing 41, and a key 43 is provided between both side walls 16b on the outer peripheral surface of the elevating drive transmission shaft 40. , Two gears 44 are fixed, and each gear 44 is engaged with the rack 37 of the rack shaft 36 on the far side (left side in FIGS. 5 and 6) with respect to the workstation 10.

Further, in each of the lifting support members 16, the side of the lifting drive transmission shaft 40 (the right side in FIGS. 5 and 6).
, A gear rotation shaft 46 is arranged in parallel with this. Both ends of the gear rotation shaft 46 are rotatably supported by the lifting support member side walls 16b via bearings 47.
The two auxiliary gears 48 are fixed via a key 49 to the outer peripheral surface of each of the gears. Each of the auxiliary gears 48 is meshed with the gear 44, and at the same time, the side near the workstation 10 (FIG. 5).
6 (the right side in FIG. 6). Then, at the upper ends of all four rack shafts 36,
A common elevating plate (elevating member) 38 is fixed in a horizontal state.

Accordingly, the rotation of the lifting drive transmission shaft 40 causes the gear 4 fixed to the lifting drive transmission shaft 40 to rotate.
At the same time as the two rack shafts 36 meshing with the gear 4 move up and down, the auxiliary gear 48 meshing with the gear 44 rotates, and the two rack shafts 36 meshing with the auxiliary gear 48 also move up and down. The lifting plate 38 supported by a total of four rack shafts 36 is driven to move up and down while maintaining a horizontal state.

A clamp moving plate 50 is horizontally supported by each lifting plate 38. More specifically, a pair of guide rails 52 extending in the width direction of the lifting / lowering support member 16 (the direction in which the lifting / lowering support member 16 is moved toward and away from the workstation 10) is laid on the lifting / lowering plate 38, while the clamp moving plate 50 is provided.
Sliders 54 are fixed to the lower surface of the guide rail 52, and the clamp moving plate 50 is slidable with respect to the elevating plate 38 by fitting the sliders 54 to the guide rails 52.

A finger 56 as shown in FIG. 1 is fixed to the end of each clamp moving plate 50. The finger 56 is configured to be switchable between a state in which the work W is gripped and a state in which the work W is released, and various structures conventionally used are applicable. Then, with the sliding movement of each of the clamp moving plates 50, the finger 56 moves between a position at which the workpiece W can be gripped and a position retracted outward from this position.

As the driving mechanism of the clamp moving plate 50, first, the elevation drive transmission shaft 40 and the gear rotation shaft 46
A clamp drive transmission shaft 60 extending in parallel with the support member 12 is disposed at a lower position. The clamp drive transmission shaft 60 also has a shaft length substantially equal to the longitudinal dimension of the support member 12, and a clamp drive motor (clamp drive source) 62
(FIG. 6) and is driven to rotate by its operation. Specifically, as shown in FIG. 2, the clamp drive motor 62 is installed near the fixed block 21 in parallel with the lifting drive motor 42, and the output shaft of the clamp drive motor 62 is connected to the fixed block 21. Is connected to the clamp drive transmission shaft 60 via a drive transmission mechanism attached to the clamp drive transmission shaft and a spline mechanism.

The intermediate portion of the clamp drive transmission shaft 60 is provided with a bearing 58 at the lower end of the side wall 16b of each lifting / lowering support member 16.
And a bevel gear 64 on the outer peripheral surface of the clamp drive transmission shaft 60 via a key 63 between the side walls 16b.
Has been fixed. A vertically extending cylindrical first rotation transmission shaft 68 is provided on the lifting support member 16 side, and a bevel gear 7 is provided on the outer peripheral surface of the lower end of the first rotation transmission shaft 68 via a key 69.
0 is fixed. The upper ends of the bevel gear 70 and the first rotation transmission shaft 68 are supported by the lifting support member 16 via bearings 66 and 65, respectively, and the bevel gear 70 is meshed with the bevel gear 64. Therefore, both bevel gears 6
4, 70 constitute a first transmission mechanism for converting the rotational movement of the clamp drive transmission shaft 60 into the rotational movement of the first rotation transmission shaft 68.

A second rotation transmission shaft 72 is fitted inside the first rotation transmission shaft 68. Both rotation transmission shafts 68, 7
Reference numeral 2 denotes a spline fitting in this embodiment, and both rotate integrally, but are relatively movable in the vertical direction.

A gear 74 is fixed to the upper end of the second rotation transmission shaft 72 via a key 73, and the outer peripheral surface of the gear 74 is rotatably supported by the lifting plate 38 via a bearing 76. On the lower surface of the clamp moving plate 50, a rack 78 extending in a direction of coming and going with respect to the work station is fixed, and the gear 74 is engaged with the rack 78.

Therefore, the rotation of the second rotation transmission shaft is restricted by the rack 78 and the gear 74 to the clamp moving plate 50.
A second transmission mechanism that converts the movement into a direction of coming and going with respect to the work station 10 is configured. The rotation transmission shafts 68 and 72 rotate integrally, and all the clamp moving plates 50 are simultaneously slid in the clamping direction or the unclamping direction. The vertical movement of the second rotation transmission shaft 72 with respect to the first rotation transmission shaft 68 causes the lifting support member 16 to move upward and downward.
The lifting plate 38 and the clamp moving plate 50 can be moved up and down.

According to this apparatus, the work W processed at each workstation 10 can be simultaneously transferred to the next workstation 10 in the following manner.

Clamping operation: With the lift plate 38 at the lower end position in FIGS. 5 and 7, the clamp drive transmission shaft 60 is driven to rotate in a predetermined direction so that each clamp moving plate 50 approaches the work station 10. And the fingers 56 at the ends of the clamp moving plate 50
The work W is clamped from both sides.

Lifting operation: While the above clamped state is maintained, the lifting drive transmission shaft 40 is driven to rotate clockwise in FIG. 5 so that the rack shafts 36 supported by the lifting support members 16 are raised simultaneously. The lifting plate 38 and the clamp moving plate 50 are raised. Thereby, each work W is picked up from the current work station 10 all at once.

Feeding operation: By actuating the feed drive motor 28, the driven block 20 and all the lifting support members 16 connected thereto are slid in the feed direction. Accordingly, the entire lifting plate 38 and the entire clamp moving plate 50 also move in the same direction, and each clamped work W is transferred to the next work station 10 in the horizontal direction.

Lowering operation: The rack driving shafts 36 supported by the respective lifting support members 16 are simultaneously lowered by rotating the lifting drive transmission shaft 40 in the opposite direction (counterclockwise direction in FIG. 5). Then, the lifting plate 38 and the clamp moving plate 50 are lowered. Thereby, each work W is set to the next work station 10.

Unclamp operation: After the gripping of the workpiece W by the finger 56 is released, the clamp drive transmission shaft 6
By rotating 0 in the direction opposite to the above, each clamp moving plate 50 is moved in a direction away from the workstation 10.

Return operation: By operating the feed drive motor 28 in the reverse direction, the driven block 20, the lifting support member 16, the lifting plate 38, and the clamp moving plate 50 are integrally moved in the return direction. Prepare for the next work transfer.

According to such a device, the feed driving of the lifting support member 16, the lifting drive of the lifting plate 38, and By driving the clamp moving plate 50, all the operations necessary for transporting the work can be performed, and high support rigidity can be secured by the support member 12. Therefore, each work can be quickly conveyed with little power without deformation or dropping of the work W.

As in this embodiment, if a plurality of elevating and lowering supporting members 16 are intermittently arranged in the longitudinal direction of the supporting member 12 and these are connected to each other by the connecting rods 18, the entire feed moving member can be reduced in weight. This has the advantage that the required driving force can be further reduced. In addition, each of the elevating and lowering support members 16 is a support member 1
2, the support rigidity of the entire feed moving member can be sufficiently secured.

The present invention is not limited to such an embodiment, but may take the following forms as examples.

(1) In the above embodiment, instead of disposing the lifting / lowering drive transmission shaft 40, lifting / lowering driving means such as a hydraulic cylinder is provided for each of the lifting / lowering plates 38 so that the lifting / lowering plates 38 can be individually driven to lift / lower. However, it is possible to carry the work. However, if the common lifting drive transmission shaft 40 is rotationally driven to convert the rotation to the lifting and lowering movement of each lifting plate 38 as in the above embodiment, the structure can be further simplified, and each There is an advantage that the elevation timing of the elevation plate 38 can be reliably synchronized. In particular, in the above-described embodiment, in addition to the gear 44 on the lifting drive transmission shaft 40 side, the auxiliary gear 48
, A large number of rack shafts 36 can be raised and lowered by a single lifting drive transmission shaft 40, and
Can be raised and lowered while supporting in a more stable state.

(2) In the above embodiment, a fluid pressure cylinder or the like may be installed horizontally on the elevating plate 38, and the clamp moving plate 50 may be slid by its expansion and contraction. However, according to the structure as in the above-described embodiment, the first rotation transmission shaft 68 and the second rotation transmission shaft 72 can be moved up and down by the relative movement in the vertical direction, while the up-down plate 38 and the clamp moving plate 50 can be moved up and down. The rotational motion of the clamp drive transmission shaft 60 can be converted into the sliding motion of each clamp moving plate 50, whereby there is an advantage that the movement timing of each clamp moving plate 50 can be reliably synchronized while simplifying the structure. .

(3) In the above embodiment, the first rotation transmission shaft 68
Is cylindrical, and the second rotation transmission shaft 72 is fitted inside the cylinder. Alternatively, the second rotation transmission shaft 72 may be cylindrical, and the first rotation transmission shaft 71 may be fitted inside the cylinder. Good. The cross-sectional shape of the two rotation transmitting shafts 68 and 72 may be any shape as long as they can transmit rotation to each other, and the cross-sectional shape of the fitting portion may be set to an ellipse or a polygon.

[0063]

As described above, according to the present invention, the feed moving member is movably supported in the longitudinal direction by the support member extending in the direction in which the workstations are arranged, and the feed moving member supports a plurality of elevating members. Since the clamp moving members are supported by the elevating members and the workpiece moving portions are provided on these clamp moving members, the feed driving of the feed moving member can be performed without raising and lowering the entire long transport bar as in the related art.
All the operations necessary for transporting the workpiece can be performed by the lifting and lowering drive of the lifting and lowering member and the driving of the clamp moving member, and the support member can ensure high support rigidity of the feed moving member. Therefore, there is an effect that each work can be quickly conveyed with little power without causing deformation or dropping of the work.

Further, as the feed moving member, a plurality of elevating and lowering support members are intermittently arranged, and these are connected to each other by a connecting member. There is an effect that the required amount of driving force can be further reduced by reducing the weight of the entire feed moving member as compared with the formed one. In addition, since each lifting support member is supported by the support member, the support rigidity of the entire feed moving member can be sufficiently secured.

According to a second aspect of the present invention, the lifting drive means includes a lifting drive transmission shaft extending in the direction in which the workstations are arranged, and a lifting conversion mechanism for converting the rotational motion of the transmission shaft into the lifting motion of each lifting member. Therefore, all the lifting members in a row can be driven up and down simultaneously by a single lifting drive source. Therefore, there is an effect that the structure can be simplified and the ascending / descending timing of each elevating member can be reliably synchronized.

More specifically, in the device according to the third aspect,
With a simple structure in which a gear is fixed to the elevating drive transmission shaft and a rack is fixed to the elevating member side, there is an effect that the elevating member can be driven up and down.

Further, in the apparatus according to the fourth aspect, an auxiliary gear is also meshed with the gear meshing with the rack, and the rack is also meshed with the auxiliary gear, so that the former rack and the latter rack are shared by a common elevating member. Since it is fixed, there is an effect that the supporting state of the elevating member can be more stabilized by using more racks.

According to a fifth aspect of the present invention, as the clamp driving means, a clamp drive transmitting shaft extending in the direction in which the workstations are arranged, a clamp drive source for rotating the clamp drive transmitting shaft, and the clamp drive transmitting shaft are provided. And a conversion mechanism for converting the rotational movement of each clamp moving member into a movement in a direction of moving toward and away from the work station of each clamp moving member. At the same time, it can be moved toward and away from the workstation. Therefore, there is an effect that the structure can be simplified and the movement timing of each clamp moving member can be reliably synchronized.

More specifically, according to the apparatus of the sixth aspect, the first rotation transmission shaft and the second rotation transmission shaft are vertically moved relative to each other so as to correspond to the elevating member and the clamp moving member. There is an effect that the rotational motion of the common clamp drive transmission shaft can be satisfactorily converted into the motion of each clamp moving member via the two rotation transmission shafts, the first transmission mechanism, and the second transmission mechanism.

Here, in the device according to the seventh aspect, one of the first rotation transmission shaft and the second rotation transmission shaft is formed into a cylindrical shape, and the other is fitted inside the cylindrical shape. Since it has a modified cross section, there is an effect that the rotation transmission between the two rotation transmission shafts and the relative movement in the vertical direction can be realized with a compact structure in which both the rotation transmission shafts are arranged coaxially.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a work transfer device of a transfer press according to an embodiment of the present invention.

FIG. 2 is an overall plan view of the transfer press.

FIG. 3 is a plan view showing feed driving means of the work transfer device.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional front view showing a main part of the work transfer device.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a sectional side view showing a main part of the work transfer device.

FIG. 8 is an explanatory diagram showing an operation necessary for transporting a work in a general transfer press.

FIG. 9 is a perspective view showing a main part of a work transfer device of a conventional transfer press.

FIG. 10A is an explanatory diagram illustrating a bent state of the transfer bar in the work transfer device at the time of starting to ascend, and FIG. 10B is an explanatory diagram illustrating a bent state of the transfer bar at the start of lowering of the same.

[Explanation of symbols]

 Reference Signs List 10 workstation 12 support member 14 guide rail 16 elevating support member 18 connecting rod (connecting member) 28 feed drive motor (feed drive means) 36 rack shaft 37 rack 38 elevating plate (elevating member) 40 elevating drive transmission shaft 42 elevating drive motor (Elevation drive source) 44 Gear 48 Auxiliary gear 50 Clamp moving plate (Clamp moving member) 56 Finger (Work gripping part) 60 Clamp drive transmission shaft 62 Clamp drive motor (Clamp drive source) 64, 70 Bevel gear (First transmission mechanism) ) 68 First rotation transmission shaft 72 Second rotation transmission shaft 74 Gear (second transmission mechanism) 78 Rack (second transmission mechanism) W Work

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-245929 (JP, A) JP-A-63-194831 (JP, A) JP-A 4-75628 (JP, U) JP-A 5- 49137 (JP, U) Jikken 63-27877 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 43/05

Claims (7)

(57) [Claims] 1. A work transfer device for a transfer press for sequentially transferring works to a plurality of work stations arranged in one direction, a support provided on both sides of the work station and extending parallel to the arrangement direction of the work stations. A member, a feed moving member extending in the same direction as the support member, and supported by the support member so as to be movable in the longitudinal direction, a feed drive means for moving the feed moving member, and a direction in which the workstations are arranged. A plurality of elevating members which are juxtaposed and supported so as to be able to move up and down by the feed moving member, elevating drive means for elevating each elevating member with respect to the feed moving member, and Movably supported by each lifting member,
A plurality of clamp moving members having a work gripper for gripping the work, and clamp driving means for moving each clamp moving member with respect to the elevating member ;
The lifting member is supported so as to be able to move up and down as a feed moving member.
A plurality of lifting and lowering support members
It is arranged intermittently in the direction and supported by the support member.
The lifting support members are connected to each other in the
A work transfer device for a transfer press, characterized in that the work transfer device is connected via a . 2. The work transfer device of a transfer press according to claim 1 , wherein said lifting drive means includes a lifting drive transmission shaft extending in a direction in which said workstations are arranged, and a lifting drive source for rotating said lifting drive transmission shaft. When,
And a lifting / lowering conversion mechanism for converting the rotation of the lifting / lowering drive transmission shaft into the lifting / lowering movement of each lifting / lowering member. 3. The transfer machine for a transfer press according to claim 2, wherein the lifting / lowering conversion mechanism includes a gear fixed to the lifting / lowering drive transmission shaft, and extends vertically.
A work transfer device for a transfer press, comprising: a rack supported by the feed moving member so as to be able to move up and down, meshing the rack with the gear, and fixing the elevating member at an upper end of the rack. 4. The work transfer device for a transfer press according to claim 3, wherein an auxiliary gear meshing with said gear is rotatably supported by a feed moving member, and another rack different from said rack meshes with said auxiliary gear. Wherein the upper end of the former rack and the upper end of the latter rack are fixed to a common elevating member. 5. The workpiece transfer device for a transfer press according to any one of claims 1-4, as the clamp drive means, and a clamp drive transmission shaft extending in the arrangement direction of the work station, the clamp drive transmission shaft A transfer comprising: a clamp drive source that is driven to rotate; and a clamp conversion mechanism that converts the rotational movement of the clamp drive transmission shaft into a movement of each clamp moving member in a direction to move toward and away from the work station. Press work transfer device. 6. The transfer machine for a transfer press according to claim 5 , wherein:
A first rotation transmission shaft that extends in the up-down direction and is rotatably supported by the feed moving member; a first transmission mechanism that converts a rotation of the clamp drive transmission shaft into a rotation of the first rotation transmission shaft; A second rotation transmission shaft connected to the first rotation transmission shaft so as to rotate integrally with the first rotation transmission shaft and to be relatively movable up and down; a second rotation transmission shaft and the clamp moving member; And a second transmission mechanism for converting the rotational movement of the second rotation transmission shaft into a movement of the clamp moving member in the direction of moving toward and away from the work station. Work transfer device. 7. The transfer press work transfer device according to claim 6 , wherein one of the first rotation transmission shaft and the second rotation transmission shaft is formed in a cylindrical shape, and the other is fitted inside the cylindrical member. A work transfer device for a transfer press, wherein the fitting cross section has an irregular cross section.