JPH0522348Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a workpiece reversing device, and particularly to a device used for reversing a workpiece after press working.

Conventional technology For example, a plate-shaped workpiece that has been drawn using a press machine has a convex portion that protrudes from the bottom surface. It is preferable that the convex portion be placed on the upper surface side by inverting the convex portion. Thereafter, a reversing device is conventionally used to reverse the workpiece after drawing.

FIG. 8 shows a conventional reversing device.
In the drawing, 1 is a press machine for drawing a plate-shaped workpiece 2, which consists of a lower die 4 that is removably attached to a holder 3, and an upper die that is movable up and down above the lower die. It consists of 5.
Reference numeral 6 denotes a lifter incorporated in the lower mold 4, and the workpiece 2 after drawing is taken out from the lower mold 4 by the lifting operation of the lifter 6. Reference numeral 7 denotes an iron hand rotatably attached to the machine frame, etc., and 8 a clamp claw provided at the tip of the ununhand 7 so that it can be opened and closed. The workpiece 2 pushed up at step 6 is clamped and taken out from the lower die 4. 9 is the above press machine 1
A conveyor installed on the workpiece take-out side of 10
is a reversing rope provided above the conveyor 9.

When the drawing process of the workpiece 2 by the press machine 1 is completed and the protruding portion 2a is formed on the workpiece 2, the workpiece 2 is pushed up from the lower die 4 by the lifter 6. Then, the iron hand 7, which was waiting at a predetermined position, rotates clockwise, and the end edge 2b of the workpiece 2 is gripped by the clamp claw 8. Thereafter, the iron hand 7 rotates counterclockwise, and the rotation of the iron hand 7 causes the workpiece 2 to
is taken out from the lower mold 4 and is held upright on a conveyor 9 that is being driven in the direction of the arrow in the figure while leaning against the reversing rope 10. When the workpiece 2 is held upright on the conveyor 9, the gripping of the workpiece 2 by the clamp claws 8 is released, and by releasing the gripping of the workpiece 2, the upper part of the workpiece 2 is pressed by the reversing rope 10. The workpiece 2 lies down on the conveyor 9, the convex portion 2a is located on the upper surface side, and the reversal of the workpiece 2 is completed.

Problems to be Solved by the Invention According to the above-mentioned conventional reversing device, the drawn workpiece 2 must be held upright on the conveyor 9, which causes distortion of the workpiece 2 due to its own weight. . Moreover, since the workpiece 2 falls down on the conveyor 9 due to its own weight after standing up, the workpiece 2 is damaged by the impact when it falls down. Furthermore, since the above-mentioned conventional reversing device is not equipped with a positioning means, the posture of the workpiece 2 after reversal becomes uneven, which causes a problem that it is difficult to automatically carry the workpiece 2 in the next process. .

Means for Solving the Problems The present invention was proposed in view of the above-mentioned problems, and includes a pair of reversing arms that are pivoted to face each other so as to be able to reciprocate and rotate, and a support shaft at the tip of each reversing arm. The support arm is rotatably connected via the support arm and is equipped with a plurality of clamp claws so as to be openable and closable, and the reversal drive mechanism reciprocates the reversal arm. The support shaft of the support arm is rotated by a predetermined angle in the same direction as the rotation direction of the reversing arm in conjunction with the reciprocating rotation of the reversing arm. A parallel movement mechanism unit rotates the reversing arm by a predetermined angle in the direction opposite to the rotation direction of the reversing arm in conjunction with the rotational movement, and the drive force of the speed increase mechanism unit and the parallel movement mechanism unit is selectively applied to the support shaft of the support arm. The invention is characterized in that it has a clutch mechanism section for transmitting the clutch.

Operation In the case of a workpiece that is to be reversed, when the drawn workpiece is held at the reversal start position, the reversal arm rotates toward the reversal start position, grips the workpiece with the clamp claw, and then the reversal arm rotates to the reverse end position. Then, in conjunction with the rotational movement of the reversing arm, the support arm rotates approximately half a turn, and the work gripped by the clamp claw of the support arm is reversed and positioned and held at the reversal end position. Ru.

In addition, in the case of a workpiece that is not reversed, the support arm moves in parallel in conjunction with the rotational movement of the reversal arm, so the workpiece gripped by the clamp claw at the reversal start position moves parallelly to the reversal end position. Positioned and held.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 7.

FIG. 2 shows an outline of the device of the present invention. In the drawings, 11 is a base, 12 is a base 11
A guide rail 13 is installed on the front side of the guide rail 12 along the reversal direction of the workpiece 2, and a traction tool 13 is straddled so as to be able to move back and forth in a straight line. It is provided so that it can be opened and closed. Reference numerals 15 and 15 designate workpiece support members that are installed opposite to each other at the reversal start position a of the workpiece 2 via the guide rail 12. It has been established. Reference numeral 19 denotes a conveying tool which is straddled over the rear side of the guide rail 12 so as to be able to move back and forth in a straight line.
This conveyance tool 19 has a mounting rod 2 attached to both ends of a rod 21 installed on a base plate 20 via support rods 22, 22.
3 and 23, the workpiece 2 is held at the reversal end position b when it is at the forward end position. Reference numeral 24 denotes a reversing device for transferring the workpiece 2 from the reversing start position a to the reversing end position b. a pair of reversing arms 26, 26 which are pivotally connected in an upright position, and the reversing arm 2
6, 26, and has a plurality of clamp claws 27.
8, 28, and a reversing drive mechanism, which will be described later, which causes the support arms 28, 28 to interlock with the reversing arms 26, 26 to move approximately half a rotation or in parallel.

FIG. 1 shows a reversing drive mechanism 29 of the reversing device 24.
The details are shown below. In addition, since the reversing arm parts 25, 25 of the reversing device 24 are symmetrical, one of the reversing arm parts 25, 25
5 will be explained, and the other reversing arm portion 25 will be explained.
The explanation will be omitted.

30 is a support stand installed on the base 11;
Reference numeral 1 denotes a frame structure in which a plurality of frames are assembled, and this frame structure 31 is installed on the support stand 30 via a plurality of support members 32. 33
is a screw shaft that can be rotated in forward and reverse directions and is disposed in a horizontal direction orthogonal to the reversal transfer direction of the workpiece 2, and both ends of this screw shaft 33 are connected to the outer end of the frame structure 31 via bearings 34, 34. And frames 31a and 31b at the inner end are rotatably obstructed, respectively. 35 is a support pedestal fixed on the frames 31b and 31c at the outer end of the frame structure 31; 36 is a support holder fixed on the frame 31a at the inner end of the frame structure 31; 37 is rotatable in forward and reverse directions; and,
A rotating shaft disposed above the screw shaft 33 and parallel to the screw shaft 33, and at the outer end of the rotating shaft 37.
A pinion 39 having protrusions 38, 38 formed on both end faces is integrally supported and fixed. The protrusions 38, 38 of the pinion 39 are rotatably supported by the support pedestal 35 via bearings 40, 40, and the inner end 41 of the rotating shaft 37 is rotatably supported by the support pedestal 36 via the bearing 42. It is freely supported. Reference numeral 43 denotes a rack that is held through the upper end of the support pedestal 35 so as to be able to reciprocate in the reverse transfer direction of the workpiece 2, and this rack 43 is connected to the pinion 39 on the rotation shaft 37.
It is meshed with Reference numeral 44 denotes a movable sleeve that is rotatably supported on the rotary shaft 37 so as to be movable in the axial direction and integrally with the rotary shaft 37, and the proximal end of the reversing arm 26 is attached to the outer peripheral surface of the movable sleeve 44. is permanently installed. 45, 46 are bearings 47, 4
A support frame body rotatably supports both ends of the movable sleeve 44 via the movable sleeve 44, and a fixed gear is provided on the outer end surface of the support frame body 45 located inside the movable sleeve 44 so as to be loosely fitted concentrically with the movable sleeve 44. 48 is integrally attached and fixed like a brim. Reference numeral 49 denotes a movable base having a protruding portion 52 having a screw hole 51 formed on the lower surface of a base plate portion 50, and the support frames 45, 46 are mounted on this movable base 49.
At the same time, a protrusion 52 is attached to the screw shaft 33.
The screw holes 51 are screwed together.

Reference numeral 53 denotes a support sleeve fixed to the tip of the reversing arm 26, and this support sleeve 53 is held in a direction perpendicular to the reversing transfer direction of the workpiece 2 and parallel to the rotating shaft 37. A support shaft 54 is rotatably fitted into the support sleeve 53, and the intermediate portion 28a of the support arm 28 is fixedly attached to an inner shaft portion 55 that projects inwardly of the support shaft 54. Further, the clamp claws 27 are attached to both ends of the support arm 28 so as to be openable and closable. For example, as shown in FIG. 4, the clamp claw 27 is composed of a pair of upper and lower claw bodies 58a and 58b that are pivotally connected to the tip of the mounting base 56 via a pivot 57 so as to be openable and closable. At the base 56a of
Opposing upper wall 59a and lower wall 59 of support arm 28
Inserting the screw rod 60 held upright between b and screwing it through,
A clamp claw 27 is held so that its height can be adjusted.

Reference numeral 61 also shown in FIG. 5a is a speed increasing mechanism for rotating the support arm 28 by approximately half a rotation in conjunction with the rotational movement of the reversing arm 26 when the workpiece 2 is reversed. In the speed increasing mechanism section 61, reference numeral 62 denotes an intermediate shaft rotatably supported at the lower part of the reversing arm 26 via bearings 63, 63 and parallel to the rotating shaft 37.

64 is a mounting body 6 attached to the inner protruding end 65 of the intermediate shaft 62.
The sector gear 64 is pivotally fixed via a sector gear 64, and this sector gear 64 is meshed with the fixed gear 48 of the support frame 45. Reference numeral 67 denotes a lower speed increasing lever which is supported and fixed to the outer end of the shaft portion 68 which projects outwardly from the intermediate shaft 62, and 69 which is supported via a bearing at the outer end of the shaft portion 70 which projects outwardly from the support shaft 54. The upper speed increasing lever 71 is rotatably supported by the shaft, and 71 is the speed increasing lever 6.
Pivot pins 72, 72 at both ends to the tips of 7, 67.
This is a speed increasing rod that is rotatably connected via the .

Reference numeral 74 also shown in FIG. 5B is a mechanism section that moves the support arm 28 in parallel in conjunction with the rotational movement of the reversing arm 26 when the workpiece 2 is moved in parallel. In the parallel movement mechanism section 74, reference numeral 75 denotes a swinging lever that is pivotally fixed in the vicinity of the reversing arm of the outer shaft section 68 of the intermediate shaft 62, and 76 is rotatable at the upper part of the reversing arm 26 via bearings 77, 77. , and
A mounting shaft 78 supported parallel to the rotating shaft 37 is pivotally fixed to an outer protruding end 79 of the mounting shaft 76, and a second sector gear 81 has a lever portion 80.
is the tip of the swing lever 75 and the second sector gear 78
The tip of the lever part 80 and the pivot pins 82, 83
A connecting rod 84 rotatably connected to the support shaft 54 is a driven gear rotatably supported via a bearing in the vicinity of the reversing arm of the outer shaft portion 70 of the support shaft 54, and this driven gear 84 is connected to the second It is meshed with a sector gear 78.

Reference numeral 85 shown in FIG. 6 and FIG. to communicate. In the clutch mechanism section 85, 86 is a mounting bracket fixed to the outer end surface 87 of the reversing arm 26, and 88 is a pair of arm pieces 88a, 88b rotatably pivoted to the tip of the mounting bracket 86 via a pivot 89. A swing arm 89 is an actuation cylinder fixed through brackets 90, 90 to the approximate center of the outer end surface 87 of the reversing arm 26. The swing arm 88 is rotatably attached to the base end 93 of the swing arm 88. 94, 94 are cam followers rotatably provided on the inner surface of the upper end portion 95 of the swing arm 88; 96 is the support shaft 5;
The outer shaft portion 70 of No. 4 is swingable in the axial direction, and
A clutch cylinder 96 is rotatably supported integrally with the support shaft 54.
The upper speed increasing lever 69 is rotatably supported on the
and the driven gear 84. On the side end surfaces 98a and 98b of both side flange portions 97a and 97b of the clutch cylinder 96, projecting portions are provided on the inner end surface 69b of the base portion 69a of the speed increasing lever 69 and the outer end surface 84b of the outer end protruding portion 84a of the driven gear 84, respectively. A plurality of claw portions 101a and 101b are provided in a protruding manner to engage with the plurality of claw portions 99 and 100 in a removable manner.
Then, the cam follower 9 of the swing arm 88
4 and 94 are disposed so as to be held on both sides of the outer peripheral surface of the clutch cylinder 96 and engaged with the flange portions 97a and 97b.

Next, the operating procedure of the device of the present invention will be explained as follows.

When it is desired to reverse the workpiece 2, the actuating cylinder 89 of the clutch mechanism section 85 is actuated to retract the rod 91. Then, the swinging arm 88
rotates about the pivot shaft 89, and the flange portion 97b of the clutch tube 96 is pressed by the cam followers 94, 94, causing the clutch tube 96 to move outward, and its claw portion 101b engages with the claw of the upper speed increasing lever 69. It meshes with part 100. Further, the driving force of an electric motor (not shown) is transmitted to the rack 43 by an appropriate means to cause the rack 43 to move in a linear reciprocating motion.

Then, the pulling tool 3 moves forward, and when its clamp claw 14 grips the edge of the workpiece 2 pushed up and held in the press mold by the lifter, the pulling tool 13 retreats, and the workpiece 2 is moved to the starting point of reversal. It is placed and held on the workpiece support members 15, 15 at position a. At the same time, the linear movement of the rack 43 in the reverse direction rotates the pinion 39 that engages with the rack 43, and the rotating shaft 37 rotates together with this pinion 39 in the reverse direction. Then, the reversing arm 26 fixed on the rotating shaft 37 via the movable sleeve 44
rotates toward the reversal start position a. At this time, each lamp claw 27 attached to the support arm 28 is held in an open state, and when the reversing arm 26 is at the reversing starting end position, the reversing arm 26 is held in a horizontal position.
When the clamp claws 27 are held in positions facing both side edges of the workpiece 2 as shown in FIG. 7, each clamp claw 27 closes and grips both side edges of the workpiece 2. After that, the above Rack 43
moves linearly in the normal rotation direction, causing the rotating shaft 37 to rotate in the normal direction via the pinion 39. The normal rotation of the rotating shaft 37 causes the reversing arm 26 to rotate toward the reversing end position b, and at the reversing end position, it is held in an inclined position as shown in FIG. 5a. When the reversing arm 26 rotates, the first sector gear 64 moves on the fixed gear 48 of the support frame 45 while meshing with the fixed gear 48, and the reversing arm 26 rotates around the intermediate shaft 62 as a fulcrum.
At the same time, the lower speed increasing lever 67 and the swinging lever 75 fixed on the intermediate shaft 62 rotate in the same direction as the first sector gear 64 with the intermediate shaft 62 as a fulcrum. do. Then, the speed increasing rod 71 and the connecting rod 81 move to the lower speed increasing lever 67.
and the swinging lever 75, so that
The upper speed increasing lever 69 rotates about the support shaft 54, and the second sector gear 78, whose lever portion 80 is pulled by the connecting rod 81, rotates about the mounting shaft 79. A driven gear 84 rotatably supported by the support shaft 54 is engaged with a second sector gear 78, and when the driven gear 84 rotates in the opposite direction to the rotation direction of the reversing arm 26, the clutch mechanism section 85 rotates. The claw portion 101b of the crank tube 96 is connected to the upper speed increasing lever 6.
The driven gear 84 is engaged with the claw portion 100 of 9.
The driven gear 8 does not engage with the pawl 99 of the
4 rotates freely. Therefore, the rotational force of the upper speed increase lever 69 is transmitted to the support shaft 54 via the clutch cylinder 96, and the support arm 28 attached to the inner end of the support shaft 54 adjusts the rotation angle of the reversing arm 26. It rotates by a larger predetermined angle to make approximately half a turn, and is held in a horizontal position at the end position of inversion. In this way, at the reversal start position a, the workpiece 2 gripped by the clamp claws 27 of the support arm 26 is reversed and positioned and held in a horizontal position on the mounting rods 22 and 23 of the transport tool 19, and the clamp claws 27 opens and the grip on the edge of the workpiece 2 is released. When the grip of the workpiece 2 by the clamp claws 27 is released, the conveyance tool 19 moves to the next stroke. At the same time, the rack 43 moves linearly in the reverse direction,
The rotating shaft 37 rotates in reverse together with the pinion 39, and the reversing arm 26 rotates toward the reversing start position a. Thereafter, the workpiece 2 is reversely transferred in the same manner as described above.

Next, if you want to move the workpiece 2 in parallel, press the rod 91 of the actuating cylinder 89 of the clutch mechanism section 85.
operate in a prominent manner. Then, the swing arm 88 rotates counterclockwise about the pivot shaft 89, and the clutch cylinder 9
The flange portion 97a of No. 6 is the cam follower 94, 94.
, the clutch cylinder 96 moves inward, one claw portion 101b disengages from the claw portion 100 of the speed increasing lever 69, and the other claw portion 101a engages with the claw portion 99 of the driven gear 84. Then, when the reversing arm 26 rotates from the reversing start position a to the reversing end position c, the rotational force of the driven gear 84 is transmitted to the support shaft 54 via the clutch cylinder 96.
At this time, the driven gear 84 rotates in the opposite direction to the rotating direction of the reversing arm 26, that is, in the reverse direction, as described above, so the support shaft 54 rotates in the same direction as the driven gear 84. Therefore, the support arm 28 attached to the support shaft 54 moves in parallel in conjunction with the rotational movement of the reversing arm 26. By this parallel movement of the support arm 28, the workpiece 2 gripped by the clamp claws 27 is moved in parallel from the reversal start position a to the reversal end position b while maintaining the horizontal posture.
Thereafter, the workpieces are sequentially transferred in parallel in the same manner.

Effects of the Invention According to the present invention, since the workpiece is inverted by gripping both side edges of the workpiece with the clamp claws, damage and distortion of the workpiece can be reliably prevented. Furthermore, since the workpiece after being reversed can be accurately positioned at a fixed position, automatic loading of the workpiece in the next process can be carried out very easily. In addition, by switching the clutch mechanism, the reversing drive mechanism selectively transmits the driving force of the speed increasing mechanism and the parallel movement mechanism to the support shaft of the support arm, which is linked to the reciprocating rotational movement of the reversing arm. Then, the support shaft can be rotated by a predetermined angle in the same direction or in the opposite direction to the rotating direction of the reversing arm, and the support arm can be moved approximately half a turn or parallel, so the work can be reversed and transferred with the same support arm. Can be transported in parallel,
Moreover, it becomes possible to easily switch between the reverse transfer and the parallel transfer, and the structure of the entire apparatus becomes simple, the apparatus can be made smaller, and the installation space can be used effectively. Moreover, since the workpiece can be reversely transferred or parallelly transferred with only one rotation of the reversing arm, the workpiece can be transferred quickly, and work efficiency is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention;
Fig. 2 is a schematic perspective view showing the entire device of the present invention, Fig. 3 is a partially enlarged view showing the meshing state of the first sector gear and the fixed gear, and Fig. 4 is an explanation showing a specific example of the clamp claw. Figures 5a and 5b are explanatory diagrams of the speed increasing mechanism and parallel movement mechanism of the reversing drive mechanism at the reversing end position of the reversing arm, Figure 6 is a partial cross-sectional explanatory diagram of the clutch mechanism, and Figure 7 is FIG. 3 is a perspective explanatory view showing a reversed state of the workpiece. FIG. 8 is a partially sectional explanatory view of a conventional reversing device. 26, 26... Reversing arm, 27... Clamp claw, 28, 28... Support arm, 29... Reversing drive mechanism.

Claims (1)

[Scope of utility model registration request] A pair of reversing arms that are pivotably mounted to face each other so as to be able to reciprocate, and a support that is rotatably connected to the tip of each reversing arm via a support shaft and that is equipped with a plurality of clamp claws that can be opened and closed. The reversing drive mechanism includes an arm and a reversing drive mechanism that rotates the reversing arm back and forth, and the reversing drive mechanism rotates the support shaft of the support arm in conjunction with the reciprocating rotational movement of the reversing arm, and rotates the support shaft in the direction of rotation of the reversing arm. Parallel movement of the speed increasing mechanism that rotates a predetermined angle in the same direction and the support shaft of the support arm that rotates a predetermined angle in the opposite direction to the rotation direction of the reversing arm in conjunction with the reciprocating rotation of the reversing arm. 1. A reversing device comprising: a mechanism section; and a clutch mechanism section that selectively transmits the driving force of the speed increasing mechanism section and the parallel movement mechanism section to a support shaft of a support arm.