JPH0321779Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a feed device that feeds long workpieces intermittently.

Conventional technology Conventional feed devices include, for example, a main frame,
A gripping body supported by the main frame and capable of gripping a workpiece, a reciprocating means for reciprocating the gripping body in the feeding direction of the workpiece, and screwed into the main frame on both sides of the gripping body to limit the movement of the gripping body. A device is known that is equipped with a pair of stopper bolts. In this device, after a workpiece is gripped by a gripper, a reciprocating means moves the gripper together with the workpiece in the feeding direction until it abuts against a stopper bolt in front, and the workpiece is sent out by a set length. Next, after releasing the workpiece from the gripping body, the gripping body is moved until it comes into contact with the rear stopper bolt.
If the stroke is determined by bringing the gripping body into contact with the stopper bolt in this way, highly accurate feeding can be achieved. Then, by repeating the above-described operation, the workpieces are fed one after another.

Problems to be solved by the invention If there is a change in the type of workpiece, the feed amount, that is, the distance between the stopper bolts, must be changed in accordance with the workpiece. Since both stopper bolts were provided completely separately, an operator had to rotate both stopper bolts separately with a tool to move the stopper bolts by a desired amount in a desired direction. For this reason, the adjustment work becomes complicated and work efficiency deteriorates, and there are also problems in that adjustment errors are likely to occur due to misunderstandings or the like.

Means for Solving the Problems These problems are solved by the following: a main frame, a gripping body supported by the main frame and capable of gripping the workpiece, and a reciprocating means for reciprocating the gripping body in the feeding direction of the workpiece. a pair of stopper bolts that are screwed into the main frames on both sides of the gripping body to define the movement limit of the gripping body, and can be moved in the feeding direction by rotation of the stopper bolts to adjust the movement limit; In the feed device, gears are attached to each of the stopper bolts, and a rotating member that meshes with both gears is rotatably supported on the main frame, and by rotating this rotating member, the gears and the stopper bolts are rotated. This problem can be solved by rotating the stopper bolts integrally to move them closer to each other and further away from each other by an equal amount.

Function: First, the workpiece is gripped by the gripper, and then the reciprocating means moves the gripper along with the workpiece in the feeding direction until it abuts one of the stopper bolts. As a result, the workpiece is sent out by the set length. Next, after releasing the workpiece from the grip of the gripper, the gripper is moved until it comes into contact with the other stopper bolt. By repeating this operation, the workpieces are fed one after another. Here, if there is a change in the type of workpiece, the feed amount, that is, the distance between the stopper bolts must be changed in accordance with the workpiece, but in this case, the rotating member is rotated. The rotation of this rotating member is transmitted to both gears and rotates both stopper bolts by the same amount. As a result, both stopper bolts move by the same amount in the feeding direction, approaching or separating from each other. As a result, the distance between both stopper bolts can be easily and reliably adjusted to a predetermined value.

Embodiment Hereinafter, an embodiment of this invention will be described based on the drawings.

In FIGS. 1 and 2, 1 is a press body, and a vertical cover 3 is attached to the side surface of the press body 1 via a plurality of bolts 2. A bracket 4 is fixed to the cover 3, and a horizontal rotating crankshaft 5 of the press body 1 passes through the bracket 4 and the cover 3. This crankshaft 5 is used for press work, and is rotatably supported by a bracket 4 via a bearing 6, and has a bevel gear 7 fixed to its tip. Further, a pulley 8 is attached to the crankshaft 5 on the inner side of the bearing 6. A bracket 9 is attached to the cover 3 directly below the bracket 4 with a plurality of bolts 10, and a switch box 11 containing a cam for controlling the operating timing of the press body 1 is fixed to the bracket 9. A belt 13 is stretched between the pulley 12 of the switch box 11 and the pulley 8, and transmits the rotation of the crankshaft 5 to the switch box 11. A vertical shaft 16 perpendicular to the crankshaft 5 is rotatably supported on the bracket 4 via a pair of bearings 17 and 18.
A collar 19 is interposed between 8 and 8. A bevel gear 2 that meshes with the bevel gear 7 is attached to the lower end of the shaft 16.
0 is fixed. A bracket 27 is attached to the cover 3 via a plurality of bolts 26, and a frame 3 of a feed device 29 is attached to the upper end of the bracket 27 via a plurality of bolts 28.
0 is attached. A shaft 42 coaxial with the shaft 16 is loosely fitted into a boss portion 41 formed on the frame 30 directly above the shaft 16, and this shaft 42 is rotatably supported by the boss portion 41 via a pair of bearings 43, 44. ing. Note that 45 is a collar interposed between the bearings 43 and 44, and 46 is a bearing retainer fixed to the frame 30 with bolts 47. The upper end of the shaft 16 is inserted into the lower end of the shaft 42, and the key 4 is inserted into the lower end of the shaft 42.
8, and a bevel gear 49 is fixed to the upper end of the shaft 42. As shown in FIGS. 1, 2, and 3, the frame 30 above the shaft 42 rotatably supports a shaft 55 that extends horizontally in the front-rear direction via a pair of bearings 53 and 54. A bevel gear 56 that meshes with the bevel gear 49 is fixed to. This bevel gear 56
A ring 57 is fixed to the outer periphery of the ring 5.
7 has a part of its outer circumference protruding through a bolt 58 and a lease cam 59 is attached thereto. Also,
A pair of bearings 6 are mounted on the frame 30 directly above the shaft 55.
1 and 62, a shaft 63 parallel to the shaft 55 is rotatably supported, and a spur gear 6 is fixed to this shaft 63.
4 and a spur gear 65 fixed to the shaft 55 are in mesh with each other. Further, the shaft 63 is connected to the frame 30 directly above the shaft 63 via a pair of bearings 66 and 67.
An axis 68 parallel to is rotatably supported;
The spur gear 69 fixed to 8 and the spur gear 64 mesh with each other.

In Figures 1, 2, 4, 5, and 6, the shaft 55
The lateral frame 30 has an axis 76 parallel to the axis 55.
is rotatably supported via bearings 77 and 78,
The base ends of levers 79 and 80, which are open vertically toward the shaft 55, are fixed to the shaft 76. At the tips of these levers 79, 80, cam followers 81,
82 is rotatably supported. On the other hand, a cam body 83 is fixed to the shaft 55, and this cam body 83
has cam plates 84 and 85 that roll into contact with the cam followers 81 and 82, respectively. As shown in FIG. 5, these cam plates 84, 85 have a substantially oval shape with a large eccentricity. Then, when the shaft 55 rotates, the shaft 76 is moved by the lever 79,
80, the cam body 83 rotates (oscillates) alternately in the forward direction and in the reverse direction, but at this time, the cam plates 84, 85 are held from both sides by the tips of the levers 79, 80. Therefore, the shaft 76 rotates while reliably following the cam body 83. The levers 79 and 80 described above constitute a swinging body 86 as a whole. In Figures 3, 4, and 7,
The shaft 76 has a prismatic block portion 88 extending in the vertical direction at its front end, and a groove 89 extending in the radial direction is formed in the front surface of the block portion 88.

On the other hand, as shown in FIGS. 1, 3, 4, 7, 8, 9, and 10, the frame 30 above the shaft 76 has
A pair of blocks 97, 98 are fixed via a plurality of bolts 95, 96, and these blocks 97, 9
A slider 103 is slidably supported on a pair of shafts 99 and 100 parallel to the crankshaft 5 , and a lower gripper plate 105 is attached to the upper surface of the slider 103 via a countersunk screw 104 .
is installed. The aforementioned cover 3, bracket 27, frame 30, blocks 97, 9
8. The shafts 99 and 100 constitute a main frame 106 as a whole. Also, the slider 103 has a pin 111.
The upper end (one end) of a lever 112 disposed immediately in front of the block portion 88 is rotatably connected through the lever 112, and a slider 114 is movably inserted into a longitudinally extending slit 113 formed in the lever 112. has been done. The slider 114 is guided and prevented from coming off by a presser foot 116 attached to the lever 112 by a bolt 115. Further, a flange 119 is attached to a support plate 117 fixed to the lower end (other end) of the lever 112 via a bolt 118, and an adjustment bolt 120 parallel to the slit 113 is attached to both the flange 119 and the support plate 117. It is rotatably supported on the front side of the lever 112. And this adjustment bolt 1
20 is screwed into the slider 114. A piece 123 movably housed in a groove 89 is rotatably supported on the slider 114 via a bush 121 and a bearing 122, and the bush 121, bearing 122, and piece 123 are screwed into the collar 124 and slider 114. It is prevented from coming off by a nut 125. This piece 123 moves together with the slider 114 within the groove 89 and the slit 113 by rotation of the adjustment bolt 120, adjusts the amount of offset between it and the shaft 76, and determines the approximate amount of movement of the slider 103. The aforementioned slider 114 and piece 123 collectively constitute a movable body 128 that is slidably inserted into both the groove 89 and the slit 113. In addition,
126 is a scale attached to the lever 112, and 127 is a pointer provided to the slider 114. In Figures 3, 4 and 11, block 9
A bearing box 132 is fixed to the frame 30 directly under the frame 30 via bolts 131, and a horizontal fulcrum shaft 135 extending in the front-rear direction is rotatably supported by the bearing box 132 via a pair of bearings 133, 134. ing. A central portion of a rod 136, which is approximately parallel to the shaft 100, is loosely fitted onto the fulcrum shaft 135. A double nut 137,1 is attached to one end of the rod 136.
38 is screwed in, while double nuts 139 and 140 are also screwed into the other end of the rod 136. A spring 143 is interposed between the nut 137 and the fulcrum shaft 135 via thrust washers 141, 142, and between the nut 139 and the fulcrum shaft 135, thrust washers 144, 1
A spring 146 is interposed via 45. A pin 148 is fixed to a bracket 147 provided at the other end of the rod 136, and this pin 148 is connected to the lower end of the lever 112 via a bearing 149. In this way, the lower end of the lever 112 is elastically positioned and fixed by both springs 143 and 146. For this reason, when the shaft 76 alternately rotates (oscillates) in the forward and reverse directions, the lever 112 swings left and right about the pin 148 by the block portion 88 and the piece 123.
This causes the slider 103 to move to the shafts 99, 100.
It moves back and forth along the . At this time, the piece 123 moves slightly up and down in the groove 89 of the block part 88, and
The rod 136 swings slightly around the fulcrum shaft 135. The aforementioned cam body 83 and levers 79, 8
0, shaft 76, block part 88, groove 89, lever 1
12, the slit 113, the adjustment bolt 120, and the movable body 128 collectively form a grip body 197 consisting of a slider 103 and a gripper 196 to be described later.
A reciprocating means 150 is configured to reciprocate in the feeding direction of the workpiece W.

Blocks 97 and 98 on both sides of the gripping body 197
As shown in FIGS. 1, 3, 4, 8, 9, and 12, stopper bolts 156 and 157 that are parallel to the axis 99 and define the limit of movement of the gripping body 197 are screwed into these stopper bolts. 156,157
Spur gears 160 and 161 as gears are attached to the central portion of the shaft via keys 158 and 159 so as to be relatively movable in the axial direction. Furthermore, this spur gear 1
Since the gears 60 and 161 are housed in the slits 162 and 163 formed in the blocks 97 and 98, they cannot move in the axial direction, and as a result, the spur gears 160 and
When 161 rotates, the stopper bolt 156,1
57 moves in the axial direction. Directly below the shaft 100 is provided a rod 171 whose both ends are rotatably supported by blocks 97 and 98, and a knob 172 is fixed to one end of the rod 171. Also,
This rod 171 has the spur gears 160, 161
Spur gears 173, 174 that mesh with the pins 176 are fixed by pins 176, so that when the rod 171 is rotated, the stopper bolts 156, 157 rotate integrally with the spur gears 160, 161. As a result, the stopper bolts 156 and 157 are
The gripping body 197 moves toward and away from each other by an equal amount in the feeding direction, and the limit of movement of the gripping body 197 is finely adjusted.
The aforementioned rod 171, knob 172, spur gear 1
73, 174 are spur gears 160, 161 as a whole
A rotating member 175 that simultaneously rotates the stopper bolts 156 and 157 is configured. As a result, both stopper bolts 156, 157 can be moved to desired positions by only rotating the rotary member 175, making adjustment work easier and eliminating operational errors. The slider 103 is connected to these stopper bolts 156, 1.
When it comes into contact with 57, it stops moving, but at this time, if the shaft 76 has not rotated to its rotation limit,
The lever 112 swings around the pin 111 while compressing the spring 143 or 146, and rotates around the shaft 7.
Absorb the remaining rotation of 6.

1, 3, 4, 8, 9, and 10, a pair of vertical shafts 183, 184 are supported at the rear of the slider 103 via bearings 181, 182 so as to be able to rise and fall, and the upper ends of these shafts 183, 184 A roughly triangular gripper arm 185 disposed above the slider 103 is attached to the nuts 186, 18.
It is attached by 7. The shaft 18 is attached to the front end of the gripper arm 185 by a nut 188.
An axis 189 parallel to 3 is attached, and this axis 18
9 is slidably inserted into a bearing 190 provided at the front end of the slider 103. Further, on the lower surface of the gripper arm 185, an upper gripper plate 19 facing the lower gripper plate 105 is provided.
1 is attached by bolts 192, and as a result, when the gripper arm 185 descends, the upper and lower gripper plates 191, 105 clamp the workpiece W. At the lower ends of the shafts 183, 184, both ends of horizontal rails 193 are connected to nuts 194, 1.
It is attached by 95. Axis 1 mentioned above
83, 184, gripper arm 185, shaft 18
9. The rail 193 is the gripper 19 as a whole
6, and this gripper 196 is supported by the slider 103 so as to be able to approach and separate from it. Further, the slider 103 and the gripper 196 collectively constitute a gripping body 197 that can grip the workpiece W.

1, 2, 4, 8, and 13, the frame 30 behind the axis 68 has an axis 201 parallel to the axis 99.
is rotatably supported via bearings 202 and 203, and a bevel gear 204 fixed to this shaft 201 has a bevel gear 205 fixed to the rear end of the shaft 68.
are interlocking. A cam body 206 is fixed to one end of this shaft 201 by a bolt 207 and a presser foot 208, and this cam body 206 has a pair of cam plates 209 and 210 that are separated in the axial direction and rotate together. A nut 2 is placed on the frame 30 just in front of the shaft 201.
15 fixes the pin 216, and this pin 2
A central portion of a rocking body 218 is rotatably supported by the rocker 16 via a bearing 217 . This rocking body 21
The rear end side of 8 is divided into two parts and has a pair of levers 22.
2, 223, and these levers 2
22 and 223 are inclined so as to be separated from each other toward the tip. And these levers 22
The tips of the levers 2 and 223 extend to the vicinity directly above and below the cam body 206, respectively, and the tips of the levers 222 and 223 are provided with a cam plate 2.
Cam followers 219 and 220 are rotatably supported on the outer peripheries of 09 and 210, respectively, and are in constant rolling contact with each other. As a result, both cam plates 209,
210 is held between both sides by cam followers 219 and 220 located at the tips of these levers 222 and 223. Here, one of the cam followers 219, 220, the cam follower 219 in this embodiment, uses a known eccentric cam follower. As a result, with the cam follower 220 pressed against the cam plate 210, the cam follower 220
Rotate the pin 221 of 9 to attach the cam follower 219.
By contacting the cam plates 209 and 210 with the cam followers 219 and 220, it is possible to easily bring the cam plates 209 and 210 into contact with the cam followers 219 and 220 at the same time. When the shaft 201 rotates, the oscillator 218 is pushed by the cam plate 209 and the pin 2
The rocking body 218 swings (oscillates) in the forward direction centering on 16, and in the opposite direction when pushed by the cam plate 210. A bracket 225 fixed to an air cylinder 227 is connected to the front part of the swinging body 218 via a pin 226, and a joint 229 is attached to the tip of a piston rod 228 of the air cylinder 227. Further, air at a constant pressure is always supplied to the head side of the air cylinder 227, and as a result, the piston rod 228 is normally in a protruding state. 235 is an elevating body that passes through a slit 236 formed in the frame 30, and the rear end of this elevating body 235 is connected to the pin 2.
37 to the joint 229.
A pair of cam followers 23 are provided at the front end of the elevating body 235.
8 and 239 are rotatably supported, and these cam followers 238 and 239 sandwich the rail 193 from above and below, and roll on the upper and lower surfaces of the rail 193, respectively. In addition, these cam followers 23
Either one of 8,239 is an eccentric cam follower like the cam follower 219 described above.
For this reason, when the shaft 201 rotates and the swinging body 218 rotates, the gripper 196 moves toward and away from the slider 103, and the gripper 197 opens and closes. Also, as mentioned above, air cylinder 2
27 is attached to the frame 30 side via a rocking body 218 and a pin 216, and the biasing force of this air cylinder 227 is applied to the cam followers 238, 2.
39 and the rail 193, the force is transmitted to the gripper 196, and the gripping force on the workpiece W is determined. 240 is bolt 241, 242
and a vertical guide fixed to the frame 30 via a bracket 243.
The bolt 2 is attached to the lifting body 235 in the guide groove 244 of 0.
A fixed guide block 246 is slidably inserted through the guide block 45 and guides the elevation of the elevating body 235. The aforementioned cam body 206 and rocking body 21
8. Elevating body 235, cam follower 238, 239
is the opening/closing means 2 for opening and closing the grip body 197 as a whole.
47, and this opening/closing means 247 is connected to the grip body 19.
It is placed on the side of 7, more specifically at the rear.

In Figures 1, 3, 8, 9, 13, and 14, 2
51 is placed directly under the block 98 and is connected to the frame 3.
The lower gripper arm 2 passes through the slit 250 formed in the lower gripper arm 2.
A guide block 252 is attached to the rear end of 51 with bolts 253. 254 is a guide attached to the frame 30 via a bolt 255, and the guide block 252 is slidably inserted into a guide groove 256 formed in this guide 254 and extending vertically, so that the lower gripper arm 251 is It is supported by a frame 30 so as to be movable up and down. The lower ends of vertical shafts 259, 260 are fixed to the front and rear ends of the lower gripper arm 251 by nuts 257, 258, and these shafts 259, 260 pass through the inside of the block 98. Bearings 261 and 262 are interposed between these shafts 259 and 260 and block 98, respectively, so that shafts 259 and 260 are slidably supported by block 98. Block 98
The front and rear ends of a horizontal upper gripper arm 265 are fixed to the upper ends of shafts 259 and 260 protruding from the upper surface via nuts 263 and 264, and to the lower surface of this upper gripper arm 265 are fixed via bolts 266. Upper gripper plate 26
7 is fixed. On the other hand, a countersunk screw 2 is attached to the block 98 directly below the upper gripper plate 267.
68 fixes the lower gripper plate 269, and the upper and lower gripper plates 267,
269 grips the workpiece W when the upper gripper arm 265 descends. The above-mentioned upper and lower gripper arms 265, 251 and shafts 259, 260 collectively constitute a gripper 270 that can move toward and away from the main frame 106, and this gripper 270 and block 98 form a fixed grip that can be opened and closed. A body 271 is configured. A cam body 283 having a pair of cam plates 281 and 282 is fixed to the other end of the shaft 201, and a pin 285 is fixed to the frame 30 immediately in front of the cam body 283 by a nut 284. A rocking body 286 similar to the rocking body 218 whose rear end side is bifurcated is rotatably supported on this pin 285 via a bearing 280. This rocking body 286 rotatably supports cam followers 287 and 288 that roll into contact with the cam plates 281 and 282, respectively, and one of the cam followers 287 and 288 is rotatably supported.
Similar to the cam follower 219, the cam followers 87 and 288 can move eccentrically. Further, the rocking body 2
A bracket 293 fixed to an air cylinder 292 is connected to the front end of the piston 86 via a pin 291, and a joint 295 is attached to the tip of a piston rod 294 of the air cylinder 292. This joint 295 and the lower gripper arm 2
The bracket 296 provided on the pin 29
They are connected via 7. The aforementioned cam body 28
3. The swinging body 286 as a whole is a fixed gripping body 271
It constitutes an opening/closing means 298 for opening and closing.

In Figures 1, 2, 3, and 14, a plate 302 is attached to the lower surface of the lower gripper arm 251 via bolts 301. Block 9
Pin 3 attached to frame 30 directly below 8
10, a bent portion of an arm 311 having a substantially L shape is rotatably supported via a bearing 312,
The release cam 5 is attached to one end of this arm 311.
A cam follower 313 that rolls into contact with the arm 311 is rotatably supported, while a protrusion 314 that can come into contact with the plate 302 is formed at the other end of the arm 311. And this arm 311 is
The lower gripper plates 267 and 269 are the work W
When the work W is being held, the upper and lower gripper arms 265, 251 are raised as necessary by being pushed and rotated by the release cam 59, thereby releasing the work W from being held.

As explained above, in this embodiment, main frame 1
A gripping body 197 that is movably supported by the 06 and grips the workpiece W by opening and closing, and the gripping body 19
an opening/closing means 247 for opening and closing 7, and the opening/closing means 247 is provided on the side of the grip body 197,
Specifically, since it is installed behind the gripping body 197, the lubricating oil supplied to the opening/closing means 247 is supplied to the opening/closing means 247.
Even if it falls from the main frame 106, specifically the axis 9
9, 100 and the gripping body 197, specifically the slider 103, and the feeding of the slider 103 is maintained with high accuracy. On the other hand, when the opening/closing means is installed above the gripping body, if the lubricating oil supplied to the movable parts of the opening/closing means falls, it will enter between the main frame and the gripping body and the gripping body will slip. This causes an error in feed accuracy.

Further, in this embodiment, the slider 103 and the slider 10 are supported by the main frame 106.
Gripper 196 supported so as to be able to approach and separate from 3.
A reciprocating means 150 for reciprocating the gripping body 197 in the feeding direction, and an opening/closing means 247 for opening and closing the gripping body 197 by moving the gripper 196 toward and away from the slider 103. The gripper 19
6 toward the slider 103 is attached to the main frame 106 side, and the urging force of this air cylinder 227 is applied to the gripper 19.
Since the clamping force on the workpiece W is determined by transmitting it to the workpiece W through rolling contact, the weight of the moving parts is reduced, vibration and noise during movement are reduced, and the impact at the limit of movement is also reduced. becomes smaller. On the other hand, if an air cylinder is attached to the slider and the gripper is pressed against the slider by the biasing force of this air cylinder, the weight of the moving parts increases, vibration and noise increase, and the movement of the air cylinder increases. The impact force at the end becomes large, making it easy to break.

Furthermore, in this embodiment, a pair of cam plates 209 and 210 are separated in the axial direction and rotate integrally.
and cam followers 219 and 220 that are constantly engaged with the outer peripheries of the cam plates 209 and 210, respectively.
A pair of levers 222, 2 that support the
23, and by arranging the levers 222, 223 such that they are spaced apart from each other toward the tip, both cam plates 209, 210 are held from both sides, and one cam plate 209 is provided. The rocking body 21
8 in the forward direction, and the other cam plate 210 swings the swinging body 218 in the opposite direction, so the swinging of the swinging body 218 is performed by both cam plates 209 and 210, and as a result, high speed Even when rotated, the cam followers 219, 220 do not fly up from the cam plates 209, 210. In contrast, there is one cam plate, one lever, a cam follower supported by the tip of the lever and engaged with the outer periphery of the cam plate, and a spring that biases the lever in the direction of pressing the cam follower against the cam plate. , in the case of
When the cam plate rotates at high speed, the cam follower flies up from the cam plate due to the inertia of the lever and cam follower, and this causes, for example, feeding,
When the timing of gripping, etc. is off, or when the cam follower returns to the cam plate, large impact noises and vibrations are generated.

Further, in this embodiment, a gripping body 197 is movably supported by the main frame 106 and can grip the workpiece W, and a block part that swings intermittently and has a groove 89 extending in the radial direction at its front end. 88; and a lever 112 which is disposed immediately in front of the block portion 88, one end of which is connected to the gripping body 197, and the other end of which is elastically positioned and fixed.
, a slit 113 formed in the lever 112 and extending in the longitudinal direction, the groove 89 and the slit 1
13 Movable body 128 slidably inserted into both sides
, and rotatably supported the adjustment bolt 120 parallel to the slit 113 and screwed into the movable body 128 on the front side of the lever 112, so that there are no other parts in front of the adjustment bolt 120. As a result, the work of rotating the adjusting bolt 120 when adjusting the amount of offset between the shaft 76 and the movable body 128 becomes easy. On the other hand, if the adjustment bolt is provided in the block and screwed into the movable body, the adjustment bolt that is hidden by the lever must be rotated, making the work difficult. It requires a lot of effort and time.

Next, the operation of one embodiment of this invention will be explained.

Now, slider 103 is stopper bolt 15
It is assumed that the gripper arm 185 and the upper gripper arm 265 are in contact with the gripper arm 185 and the upper gripper arm 265 are raised. At this time,
The rotation of the crankshaft 5 is caused by the bevel gear 7 and the bevel gear 2.
0, shaft 16, shaft 42, bevel gears 49, 56, shaft 5
5. Spur gears 65, 64, 69, shaft 68, bevel gears 205, 204, cam body 206 via shaft 201
Since the transmission is transmitted to the cam followers 219 and 210 of the cam body 206,
The gripping body 218 that is in contact with the cam plate 220 is pushed by the cam plates 209 and 210 and swings about the pin 216 . This swinging motion of the gripping body 218 is transmitted to the air cylinder 227, and the air cylinder 227 is lowered. At this time, since air at a constant pressure is always supplied to the head side of the air cylinder 227 and the piston rod 228 is in a protruding state, the descent of the air cylinder 227 is caused by the elevating body 235 guided by the guide 240 and the cam followers 238, 239. Directly transmitted. At this time, since the rail 193 is sandwiched between the cam followers 238 and 239, the cam followers 238 and 239
9 is transmitted to the gripper arm 185 via the rail 193 and the shafts 183, 184, which causes the gripper arm 185 to lower and approach the slider 103. As a result, the upper gripper plate 191 comes into contact with the strip-shaped workpiece W such as a steel strip, but even after this contact, the gripping body 218 continues to be swung in the same direction by the cam body 206, so the air cylinder 227 further descends by a predetermined distance from the contact position. At this time, since the gripper arm 185 cannot be lowered, the piston rod 228 absorbs the lowering of the air cylinder 227 and retracts, and the workpiece W is moved between the upper gripper plate 191 and the lower gripper plate 10.
5, it is sandwiched from above and below. In this way, since the air cylinder 227 applies the clamping force to the workpiece W, it is possible to maintain the clamping force at an optimal constant value. Note that when the type of workpiece W is changed, the air supply pressure to the air cylinder 227 is changed in accordance with the workpiece W, so that the clamping force is always maintained at an optimum value. Next, the rotation of the shaft 55 is transmitted to the shaft 76 via the levers 79, 80 that contact the cam plates 84, 85 of the cam body 83, causing the shaft 76 to rotate (oscillate). Due to this rotation of the shaft 76, the block portion 88 swings about the axis of rotation of the shaft 76.
Inside 9 is a piece 12 attached to a lever 112.
3 is housed, the swinging motion of the block portion 88 is transmitted to the lever 112. At this time, since the lower end of the lever 112 is held at the neutral position by the springs 143 and 146, the lever 112 swings clockwise in FIG. 3 about its lower end, that is, the pin 148. As a result, the gripping body 197 moves toward the press body 1 while being guided by the shafts 99 and 100, and feeds the workpiece W held therein into the press body 1. At this time, since the distance between the shaft 76 and the top 123 is different from the distance between the pin 148 and the top 123, the top 123 moves within the groove 89, and
As the slider 103 moves, the upper end of the lever 112 is pulled toward the press body 1, so the pin 14
8 is lifted and the rod 136 rotates counterclockwise about the fulcrum shaft 135. Also, at this time, the rail 193 is connected to the cam followers 238, 239.
These cam followers 238,2
39 rotates, the horizontal movement of the rail 193 is not transmitted to the elevating body 235, air cylinder 227, etc. Then, when the workpiece W is fed by the set length, the slider 103 moves the stopper bolt 1
However, even after this contact, the shaft 76 is further rotated by a predetermined angle in the same direction by the cam body 83, so that the lever 112 is not pushed by the top 123. pin 1
As a result, the rod 136 moves within the fulcrum shaft 135 while compressing the spring 143. For this reason, the slider 103 is attached to the stopper bolt 15.
7 and the rotation of the shaft 76 after the contact is absorbed. Next, the swinging body 286 swings around the pin 285 by the cam plates 281 and 282 of the cam body 283, and the air cylinder 29
2 is pushed down. As a result, Grizper 27
0 descends while being guided by the guide 254, and the upper gripper plate 267 and lower gripper plate 269 clamp the workpiece W that has been fed from above and below. Since the clamping force at this time is applied by the air cylinder 292 in the same manner as described above, this clamping force is maintained at an optimal constant value. Next, the gripping body 218 is swung by the cam body 206 in the opposite direction to that described above, so that the air cylinder 227, the elevating body 235, and the gripper arm 185 rise, and the workpiece W is held between the upper and lower gripper plates 191 and 105. be freed from At this time, the piston rod 228 of the air cylinder 227 protrudes to its protrusion limit due to the air pressure constantly supplied to the air cylinder 227. Also, at this time, the press main body 1 presses the workpiece W held between the fixed gripping bodies 271. Next, the shaft 76 is rotated by the cam body 83 in the opposite direction to that described above. As a result, the lever 112 first swings clockwise around the pin 111, and after the rod 136 returns to the neutral position, the lever 112 swings counterclockwise around the pin 148. As a result, the gripper 197 separates from the press body 1, comes into contact with the stopper bolt 156, and stops. At this time as well, the axis 7
6 rotates further by a predetermined angle even after contact, so
Lever 112 rotates clockwise about pin 111 to compress spring 146. As a result, the impact force at the time of the contact and the rotation of the shaft 76 after the contact is absorbed. When the pressing of the press body 1 is completed, the cam body 283 causes the swinging body 286 to swing in the opposite direction to that described above, and the air cylinder 292 and upper gripper arm 265 rise to release the workpiece W from being held. That's all the work W
This is one cycle of the feeding operation, and by repeating this cycle thereafter, the workpiece W is pressed one after another while being fed.

When adjusting the stroke of the slider 103, the knob 172 and the rod 171 are rotated by hand to rotate the stopper bolt 156 and the stopper bolt 157 in the same direction. At this time, stopper bolt 15
Since threads 6 and 157 are formed in opposite directions on their outer peripheries, they move an equal distance in the feeding direction of the workpiece W and move toward and away from each other. As a result, the distance between the stopper bolts 156 and 157 is adjusted. Also,
The adjustment bolt 120 is rotated in accordance with the change in the distance between the stopper bolts 156 and 157, and the slider 114 and the piece 123 are moved integrally along the groove 89 of the block portion 88. As a result, the distance between the rotation center of the top 123 and the rotation axis of the shaft 76 changes, and even if the swing angle of the shaft 76 remains the same, the swing angle of the lever 112 is increased or decreased. As a result, the movable range of the slider 103 changes in accordance with the change in the distance, and the grip body 19
7 travel limit is adjusted.

In addition, in the above embodiment, the stopper bolts 156, 157 were formed with reverse threads, but in this invention, both the stopper bolts 156, 1
57 in the same direction, and between the spur gears 160 and 173 or between the spur gears 161 and 174.
One idler may be inserted between them. Further, in the above-mentioned embodiment, the knob 172 is manually turned by the operator, but a motor is attached to the block 97, and this motor operates the knob 172.
You may also rotate it. Further, by supplying air to the rod sides of the air cylinders 227 and 292, the workpiece W can be released from being held by the gripping body 197 and the fixed gripping body 271 all at once.

Effects of the invention As explained above, according to this invention, the stroke adjustment work is facilitated, work efficiency is improved, and the occurrence of adjustment errors can be prevented.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of this invention, Fig. 2 is a partially cutaway left side view thereof, Fig. 3 is a partially cutaway front view showing the main parts, and Fig. 4 is a partially cutaway front view showing an embodiment of the invention. 3 is a cross-sectional view taken along the - arrow in FIG. 3, FIG. 5 is a cross-sectional view taken along the - arrow in FIG.
The figure is a sectional view taken in the direction - arrow of FIG. 3, FIG. 8 is a sectional view taken in the direction - arrow of FIG. 4, FIG. 9 is a sectional view taken in the direction - arrow of FIG. The sectional view shown in FIG. 11 is the sectional view taken along the - arrow in FIG.
Figure 2 is a sectional view taken in the - arrow direction of Figure 9, Figure 13 is a sectional view taken in the - arrow direction of Figure 4, and Figure 14 is a sectional view taken in the - arrow direction of Figure 3.
-XI arrow sectional view. 29...Feed device, 106...Main frame, 15
0... Reciprocating means, 156, 157... Stopper bolt, 160, 161... Gear, 175...
Rotating member, 197... Gripping body, W... Work.

Claims (1)

[Scope of utility model registration request] a main frame, a gripping body supported by the main frame and capable of gripping a workpiece, reciprocating means for reciprocating the gripping body in the feeding direction of the workpiece, screwed into the main frame on both sides of the gripping body, the gripping body a pair of stopper bolts that can adjust the travel limit by moving in the feeding direction by rotation of the stopper bolts, the feed device having a gear attached to each stopper bolt. At the same time, a rotating member that meshes with both gears is rotatably supported on the main frame, and by rotating this rotating member, the gear and stopper bolt are rotated integrally, and both stopper bolts are moved by the same amount. A feed device characterized in that the feed device is arranged to approach and separate.