JPH0249862B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention has a plurality of processing stations, each processing station is equipped with a processing machine that performs a predetermined processing, and a workpiece fixed on a pallet is transported through the pallet. In a transfer machine where workpieces are continuously conveyed to each processing station using a transfer bar while processing is performed, a clamp is installed at the processing station and re-clamps the workpiece fixed on the pallet during processing according to the processing conditions. It is related to the device.

Conventional technology A transfer machine has multiple processing stations, and each processing station is equipped with a dedicated processing machine that performs the specified processing in the processing order, and the workpieces are sequentially transported to each processing station using a transfer bar. Each processing station performs predetermined processing to continuously form products.

The transfer machine has two methods of transporting the workpiece from one processing station to the next processing station: one is to transport the workpiece directly using a transfer bar, and the other is to place the workpiece on a pallet and transport it via the pallet using a transfer bar. There is a method.

By the way, when a workpiece is transported using a pallet, from the viewpoint of workability, the pallet is fixed with the workpiece placed on the pallet during machining, and the machining is performed in this state. Therefore, the pallet is equipped with a clamping mechanism for fixing the workpieces. This clamping mechanism generally has a structure in which the workpiece is clamped by firmly pressing the workpiece from above.

Problems to be Solved by the Invention Since the clamping mechanism provided on the pallet only presses the workpiece from above, it suffices if the workpiece is very rigid, but if the workpiece is made of a flexible material. If the workpiece is made of a brittle or brittle material and has a bifurcated curved part, it will not be possible to simply hold the workpiece down from above, for example when drilling a hole in the workpiece, the thrust of the drill will Since the workpiece was bent and the hole was drilled in that state, there was a problem that the workpiece would return to its original shape after machining and the hole would become tilted.

Means for Solving the Problems This invention uses a transfer machine that uses pallets to continuously transport workpieces to a plurality of processing stations arranged in the order of processing, and processes the workpieces at each processing station. The pallet to be machined is equipped with a clamp mechanism that uses a presser foot to press multiple points perpendicular to the surface to be machined of the work toward the pallet, and a clamp mechanism that presses a part of the end surface of the work opposite to the surface to be machined against a fixed arm. The pallet fixing jig of the processing station is equipped with a positioning mechanism for positioning and fixing the pallet on the side surface, and a pressing means is provided on the top plate for pressing the part to be processed on the workpiece directly with a pressing lever so as to face the processing tool. It was established.

The apparatus configured as described above transports a workpiece placed on a pallet while being fixed by a presser foot and a fixed arm provided on the pallet, and then transports the workpiece placed on a pallet, and
The pallet is positioned and fixed to the jig by the positioning mechanism, and the press lever of the press means provided on the top plate of the jig directly presses the part to be processed on the workpiece from the opposite side of the processing tool, thereby absorbing the reaction force of the processing tool. Processing is performed while being supported by the pressure lever. In this way, the workpiece is fixed to the pallet and the pallet is fixed to the jig, and the part of the workpiece to be machined is directly pressed by the pressing means. Even if it is a workpiece, it can be processed without causing distortion or deformation.

In addition, the pressing direction of the jig's pressing means and the clamping direction of the workpiece by the presser foot of the pallet are different, so even when the pressing means is pressed, the pressing force of the presser foot can be easily adjusted to match the workpiece, and the position of the workpiece can be prevented. Does not occur.

Embodiment FIGS. 6 to 8 are drawings showing an example of a transfer machine that performs processing using a pallet according to the present invention, and is used for a workpiece having a bifurcated curved portion, such as an automobile engine. This figure shows a transfer machine that forms mounting holes for passing tightening bolts in the connecting rod and cap.

As shown in FIGS. 9A and 9B, the articulating rod 1 has assembly holes 2, 2 formed through both ends of the large end 1a, and counterbores 3, 3 at one end of the assembly holes 2, 2. A locking groove 5 is formed on the inner surface of the opening 4 of the large end 1a. In addition, as shown in FIG. 10 A and B, the cap 6 has mounting holes 7, 7 formed on both sides facing the mounting holes 2, 2 of the articulating rod 1. Counters 8, 8 are formed at one end, and a locking groove 9 is formed on the inner surface of the opening 6a.

The connecting rod 1 and the cap 6 are placed and fixed on a pallet 10 as a pair and processed.

For example, the processing equipment includes six processing stations b~
g, first and second reversing stations a and h, a cleaning station i, an alignment station j, and a loading/unloading station k, and the first reversing station a has a pair of articulated rods 1 and a cap 6. A reversing mechanism 11 is provided for reversing the pallet 10 to which the pallet 10 is fixed and disposing the connecting rod 1 and the cap 6 on the lower surface side of the pallet 10. The first processing station b has assembly holes 2, 2, 7, 7 from the joint end side of the connecting rod 1 and cap 6 on the right side with the pallet 10 in between.
A first processing machine 13 having drills 12, 12, . , 14...
5 is placed. The second processing station c has chamfering drills 16, 16, . The third processing machine 17 is arranged, and the assembly holes 2,
A fourth processing machine 19 having drills 18, 18, . . . for drilling holes 2, 7, 7 is disposed. In the third processing station d, a fifth processing machine 21 having plain cutters 20, 20 for forming lock grooves 5, 9 of the connecting rod 1 and cap 6 is arranged on the right side with the pallet 10 in between, and a fifth processing machine 21 is arranged on the left side. A sixth processing machine 23 having chamfering drills 22, 22, . Fourth processing station e
A seventh processing machine 25 with plane cutters 24, 24 for chamfering the lock grooves 5, 9 of the articulated rod 1 and cap 6 is placed on the right side with the pallet 10 in between, and a counterbore 3, 3 is placed on the left side. , 8, 8, which is equipped with counterbore cutters 26, 26, .
A processing machine 27 is arranged. At the fifth processing station f, a ninth processing machine 29 is arranged on the right side of the pallet 10, and has core drills 28, 28, . be. The sixth processing station g has a reamer 3 that finishes the assembly holes 2, 2, 7, and 7 with high precision.
A tenth processing machine 31 having 0, 30, . . . is arranged. The second reversing station h has pallets 10
A reversing mechanism 3 that inverts the pallet and returns the connecting rod 1 and cap 6 that were placed on the lower side to the upper side of the pallet 10.
2 is provided. At the cleaning station i, there is a pallet 1 to which the processed connecting rod 1 and cap 6 are fixed.
A transfer mechanism 35 is provided to transfer the pallets 10 onto the return conveyor 34, and a take-out mechanism 36 is provided at the alignment station j to take out the pallets 10 returned by the return conveyor 34 from the return conveyor 34 and send them to the next process. be. The loading/unloading station k is provided with a loading/unloading mechanism 37 for unloading the processed connecting rods 1 and caps 6 from the pallet 10 and transporting the unprocessed connecting rods 1 and caps 6 to the empty pallet 10. be.

Further, a box-shaped jig 38 for holding the pallet 10 is provided in the first processing station b to the sixth processing station g, and a top plate 38 of the jig 38 is provided.
A is provided with a hydraulic cylinder 39 and a positioning mechanism 40 for lifting and positioning the pallet 10 to an upper processing position.

A clamping device 33 for firmly clamping the connecting rod 1 and the cap 6 is provided on the top plate 38a of the jig 38 of the fifth processing station f and the sixth processing station g.

Further, a ladder-like transfer bar 41 is provided to support and transport the pallet 10 from the first reversing station a to the second reversing station h, and is movable back and forth. The piston rod 42a is connected to the piston rod 42a. Therefore, the pallet conveying cylinder 42
The transfer bar 41 is moved and conveys the pallet 10 by the expansion and contraction operation. The transfer bar 41 passes through the jigs 38 provided at the first processing station b to the sixth processing station g, and the telescopic stroke of the pallet conveying cylinder 42 moves the pallet 10 from one processing station to the other. The length is set to reach the next processing station, and the pallet 10 is transported one station with one expansion/contraction operation.

Further, in the vicinity of the loading/unloading station k, there are provided a carry-in conveyor 43 for carrying in unprocessed connecting rods 1 and caps 6, and a carrying-out conveyor 44 for carrying out processed connecting rods 1 and caps 6. .

Then, in the above-mentioned processing device, the unprocessed articulated rod 1 and the cap 6 brought in at the loading/unloading station k are taken out from the loading conveyor 43 by the loading/unloading mechanism 37, and placed on the empty pallet 10 and fixed. do. When the connecting rod 1 and the cap 6 are mounted on the pallet 10, the pallet 10 is sent to the first reversing station a, where the pallet 10 is reversed by the reversing mechanism 11, and the connecting rod 1 and the cap are 6
is placed on the bottom side of pallet 10, and pallet 1
0 on the transfer bar 41. Next, the pallet transfer cylinder 42 is shortened to move the transfer bar 41 forward and transfer the pallet 10 to the first
into the jig 38 of processing station b.
After that, the pallet 10 is lifted and positioned by the hydraulic cylinder 39 and positioning mechanism 40 provided on the jig 38, and then the first processing machine 13 and the second processing machine 15 are operated to remove the drill 12 and the counterbore. Assembling hole 2 to connecting rod 1 and cap 6 with cutter 14,
Approximately half of 2, 7, 7 and counterbore 3, 3, 8, 8 are formed. During this processing, the pallet transport cylinder 4
2 extends and moves the transfer bar 41 backward. After finishing the processing, the pallet 10 is lowered and placed on the transfer bar 41. Thereafter, the pallet 10 is transported into the jig 38 of the second processing station c by the pallet transport cylinder 42 and transfer bar 42. Then, at the second processing station c, the chamfering drills 16, 16, . . . of the third processing machine 17 and the drill 1 of the fourth processing machine 19
At 8, 18..., the joining side end faces of the assembly holes 2, 2, 7, 7 are chamfered, and the remaining half are bored. Next, the pallet 10 is transported from the second processing station c to the third processing station d by the transfer bar 41, where the plane cutters 20, 20 of the fifth processing machine 21 and the chamfering of the sixth processing machine 23 are carried out. The lock grooves 5, 9 are formed using drills 22, 22, . . . and the remaining end faces of the assembly holes 2, 2, 7, 7 are chamfered. Next, the pallet 10 is transported from the third processing station d to the fourth processing station e by the transfer bar 41, where it is transferred to the plain cutters 24, 24 of the seventh processing machine 25 and the counterbore of the eighth processing machine 27. The lock grooves 5, 9 are chamfered and the counterbores 3, 3, 8, 8 are finished using the cutters 26, 26, . Next, the pallet 10 is conveyed from the fourth processing station e to the fifth processing station f by the transfer bar 41, where the articulated rod 1 and the cap 6 are re-clamped by the clamping device 33, and then transferred to the ninth processing machine. 29 core drill 28, 28...
The assembly holes 2, 2, 7, and 7 are formed into a desired shape. Next, the pallet 10 is transported from the fifth processing station f to the sixth processing station g using the transfer bar 41, where the clamping device 33
Re-clamp the connecting rod 1 and cap 6 at
10 Finish the assembly holes 2, 2, 7, 7 using the reamers 30, 30, . . . of the processing machine 31. When the processing on the articulated rod 1 and the cap 6 is completed in this way, the pallet 10 is transferred from the sixth processing station g to the second reversing station h by the transfer bar 41, where the pallet is transferred by the reversing mechanism 32. 10, return the connecting rod 1 and cap 6 to the top side of the pallet 10, and then remove the pallet 1.
0 to cleaning station i. At the cleaning station i, after cleaning the connecting rod 1 and the cap 6 to completely remove chips, etc., the pallet 10 is lowered by the take-out mechanism 35 and transferred onto the return conveyor 34.
The pallets 10 are conveyed to the alignment station j, where the pallets 10 are transferred to the return conveyor 3 by the take-out mechanism 36.
4, lift it up and transport it to loading/unloading station k. Then, the connecting rod 1 and cap 6 on the pallet 10 are released at the loading/unloading station k, and the processed connecting rod 1 and cap 6 are taken out from the pallet 10 by the loading/unloading mechanism 37 and placed on the loading conveyor 44. At the same time, unprocessed connecting rods 1 and caps 6 are taken out from the carry-in conveyor 43 and placed on an empty pallet 10. Thereafter, the above-described operations are repeated to perform processing.

As mentioned above, the pallet 10 holding the connecting rod 1 and the cap 6 has the structure shown in FIGS. 11 to 15. In the figure, reference numeral 45 denotes a board, which is formed of a flat plate large enough to place a set of the connecting rod 1 and cap 6, and a holding metal fitting 46 on the upper surface of which accommodates and holds the connecting rod 1 and cap 6. ,47,
48 are provided. Also, the board 45 has a holding metal fitting 4.
Window holes 49, 50, 51, 52 before and after 6 and 48
has been established. 53 and 54 are reference holes for positioning.

The holding fitting 46 is formed with a recess 55 for accommodating and holding the large end 1a of the connecting rod 1 and restraining one side and both sides of the large end 1a. Further, the holding fitting 47 is formed with a recess 56 for accommodating and holding the small end 1b of the connecting rod 1. Further, the other holding fitting 48 is formed with a recess 57 for accommodating and holding the cap 6 and restraining one side and both sides of the cap 6.

Reference numeral 58 denotes a press pin slidably provided in the holding fitting 46, which is normally pressed by a spring 59 toward the recess 55 and presses the side surface of the large end 1a of the articulating rod 1.
Reference numeral 60 denotes a press pin slidably provided in the holding fitting 48, and is constantly pressed by a spring 61 toward the recess 57 to press the side surface of the cap 6.

62 is a first clamp mechanism provided between two holding metal fittings 46 and 48, and a support rod 63 and a presser metal 64.
It is made up of. The support rod 63 has an upper end 63
A is formed flat, an engagement groove 65 is formed on the lower end surface, and a cam hole 66 is formed in the middle part perpendicular to the axis.
has been formed. This support rod 63 penetrates the substrate 45 and supports it so as to be rotatable and movable up and down, and a spring 68 is inserted between a sleeve 67 attached to the substrate 45 and a flange 63b formed on the support rod 63.
are interspersed with compression. The presser foot 64 has pressing surfaces 64a and 64b formed on the lower surfaces of both ends, and a through hole 69 longer than the flat portion 63a of the support rod 63 in the middle portion. The presser foot 64 has a through hole 69 inserted into the flat portion 63a of the support rod 63, and is pivotably mounted on a pivot shaft 70. 71 is a cam that lowers the support rod 63, and has an engagement flange 72 integrally formed at its rear end, and a flat pressing portion 74 formed at its tip with a tapered surface 73 whose lower surface slopes upward toward the tip. There is. The tip of this cam 71 is slidably inserted into a housing 75 attached to the lower surface of the base plate 45, and the pressing portion 74 is inserted into a housing 75 attached to the lower surface of the base plate 45.
The cam 71 is opposed to the cam hole 66 formed in the
A spring 76 is compressed and interposed between the housing 75 and the housing 75. Therefore, the cam 71 is connected to the spring 7
6, the pressing part 74 enters the cam hole 66, and the tapered surface 73 pushes down the support rod 63, thereby lowering the presser foot 64, and the presser foot 64 is connected. Press the large end 1a of the rod 1 and the side of the cap 6.

77 is a second clamp mechanism provided on the outside of the holding metal fitting 46 of the board 45;
It consists of 9. The support rod 78 has an upper end 7
8a is formed flat, an engagement groove 80 is formed on the lower end surface, and a cam hole 81 is formed in the middle part perpendicular to the axis.
has been formed. This support rod 78 penetrates the substrate 45 and supports it so as to be rotatable and movable up and down, and a spring 83 is inserted between a sleeve 82 attached to the substrate 45 and a flange 78b formed on the support rod 78.
are interspersed with compression. The presser foot 79 has pressing surfaces 79a and 79b formed on the lower surfaces of both ends, and a through hole 84, which is longer than the flat portion 78a of the support rod 78, is formed in the middle portion. This presser foot 79 has a through-hole 84 inserted into the flat part 78a of the support rod 78, and
It is pivotably mounted on a pivot 85. 86 is a cam that lowers the support rod 78, and has an engaging flange 87 integrally formed at its rear end, and a flat pressing portion 89 formed at its tip with a tapered surface 88 whose lower surface slopes upward toward the tip. There is. The cam 86 has its tip slidably inserted into a housing 90 attached to the lower surface of the substrate 45, and its pressing portion 89 is opposed to a cam hole 81 formed in the support rod 78.
A spring (not shown) is compressed between the housing 90 and the housing 90. Therefore, the cam 88 is constantly pressed by the spring, and the pressing part 88 enters the cam hole 81, and the tapered surface 88 pushes down the support rod 78, thereby lowering the presser foot 79, and the presser foot 79 is pressed down. The large end 1a of the articulating rod 1 and the auxiliary stand 91 attached to the base plate 45 are pressed together.

Reference numeral 92 denotes a third clamp mechanism provided on the outside of the holding fitting 48 of the board 45, which includes a support rod 93 and a presser metal 9
It consists of 4. The support rod 93 has an upper end 9
3a is formed flat, an engagement groove 95 is formed on the lower end surface, and a cam hole 96 is formed in the middle part perpendicular to the axis.
has been formed. This support rod 93 penetrates the base plate 45 and supports it so as to be rotatable and movable up and down, and a spring 98 is inserted between a sleeve 97 attached to the base plate 45 and a flange 93b formed on the support rod 93.
are interspersed with compression. The presser foot 94 has pressing surfaces 94a and 94b formed on both lower surfaces, and a through hole 99 longer than the flat upper end portion 93a of the support rod 93 in the middle portion. The presser foot 94 has a through hole 99 inserted into the flat portion 93a of the support rod 93, and is pivotably mounted on a pivot shaft 100. 1
01 is a cam that lowers the support rod 93, and has an engagement flange 102 integrally formed at the rear end, and has a tapered surface 10 at the tip with an upward slope from the lower surface toward the tip.
A flat pressing portion 104 having a shape of 3 is formed. The cam 101 has its tip slidably inserted into a housing 105 attached to the lower surface of the substrate 45, and the pressing part 104 is opposed to a cam hole 96 formed in the support rod 93, so that the cam 101 and the housing 105 are connected to each other. A spring (not shown) is compressed between the two. Therefore, the cam 101 is constantly pressed by the spring, the pressing part 104 enters the cam hole 96, and the tapered surface 103 pushes down the support rod 93.
As a result, the presser foot 94 is lowered and the presser foot 94 is lowered.
At step 4, the cap 6 and the auxiliary stand 106 attached to the board 45 are pressed.

107 is a fourth clamp mechanism provided between the holding metal fittings 47 and 48, and a support rod 108 and a presser metal 109
It is made up of. The support rod 108 has an upper end 1
08a is formed flat, an engagement groove 110 is formed in the lower end surface, and a cam hole 111 is formed in the middle part perpendicular to the axis. This support rod 108 penetrates the base plate 45 and supports it so as to be rotatable and movable up and down, and a spring 113 is compressed and interposed between a sleeve 112 attached to the base plate 45 and a flange 108b formed on the support rod 108. . The presser foot 109 has pressing surfaces formed on the lower surfaces of both ends, and a through hole 114 longer in length than the upper end flat part 108a of the support rod 108 is formed in the middle part. This presser foot 1
09 connects the through hole 114 to the flat part 10 of the support rod 108.
8a, and is slidably pivoted on a pivot 115. 116 is a cam that lowers the support rod 108, and has an engaging flange 117 integrally formed at its rear end, and a pressing portion 119 formed at its tip into a tapered surface 118 whose lower surface slopes upward toward the tip. . The tip of the cam 116 is slidably inserted into the housing 75 attached to the lower surface of the base plate 45.
In addition, the pressing portion 119 is opposed to a cam hole 111 formed in the support rod 108, and a spring 116a is compressed and interposed between the cam 116 and the housing 75. Therefore, the cam 116 is connected to the spring 116a.
The pressing part 119 is constantly pressed by the cam hole 111.
The support rod 108 is pushed down by the tapered surface 118, thereby lowering the presser foot 109, and the presser foot 109 presses the small end 1b of the connecting rod 1 and the center portion of the cap 6.

Reference numeral 120 designates a fifth clamp mechanism provided in front of the holding fitting 47, in which the lower end of a fixed arm 122 is pivotably pivoted to the lower end of a support bracket 121 coupled to the lower surface of the board 45 with a pivot 121a, and the fixed arm The upper end of the connecting rod 122 is made to protrude above the window hole 50 formed in the base plate 45 and is opposed to the small end 1b of the connecting rod 1. Reference numeral 123 denotes a pressing rod slidably provided within the substrate 45, which has a cam hole 124 formed in its middle portion, and presses against the back surface of the fixed arm 122. 125
The cam is a cam that moves the pressing rod 123 back and forth, and has a flat pressing portion 127 having a tapered surface 126 at its upper end and an engaging flange 128 at its lower end. This cam 125 is slidably inserted into a housing 129 attached to the lower surface of the board 45, and the upper end pressing portion 127 is inserted into the cam hole 129 of the pressing rod 123.
the housing 129 and the cam 12.
5, a spring 130 is compressed and interposed between the two. Therefore, the cam 125 pushes out the pressing rod 123 with the tapered surface 126 raised by the elasticity of the spring 130, and thereby the fixed arm 12
2 to press the small end 1b of the connecting rod 1.

Reference numeral 131 denotes a sixth clamp mechanism provided in front of the holding fitting 48, in which the lower end of a fixed arm 133 is slidably pivoted to the lower end of a support bracket 132 coupled to the lower surface of the board 45 with a pivot 134, and The upper end of the arm 133 is connected to the window hole 5 formed in the substrate 45.
It projects upward from 2 and faces the cap 6. Reference numeral 135 denotes a pressing rod that is slidably provided within the base plate 45 and has a cam hole 136 formed in the middle thereof, and is pressed against the back surface of the fixed arm 133. 137
The cam is a cam that moves a pressing rod 135 back and forth, and has a flat pressing portion 139 having a tapered surface 138 at its upper end, and an engagement flange 140 at its lower end. This cam 137 is slidably inserted into a housing 141 attached to the lower surface of the board 45, and the upper end pressing portion 139 is inserted into the cam hole 13 of the pressing rod 135.
6, and further insert the housing 141 and cam 13
7, a spring 142 is compressed and interposed therebetween. Therefore, the cam 137 is raised by the elasticity of the spring 142 and pushes out the pressing rod 135 at the tapered surface 138, thereby pushing the fixed arm 13
3 to press the cap 6.

The pallet 10 with the above structure is the large end 1a of the connecting rod 1.
is accommodated in the recess 55 of the holding fitting 46, and the small end 1
b is accommodated in the recess 56 of the holding fitting 47, and the first
The pressing surface 64 of the presser foot 64 of the clamp mechanism 62 of
a and the pressing surface 79b of the presser foot 79 of the second clamping mechanism 77 presses the large end 1a of the articulating rod 1 from above, and the pressing surface 109a of the presser foot 109 of the fourth clamping mechanism 107 connects the rod. The connecting rod 1 is fixed to the pallet 10 by pressing the small end 1b of the rod 1 from above and further pressing the connecting rod 1 against the holding fitting 46 using the fixing arm 122 of the fifth clamp mechanism 120. Also, the recess 57 of the holding fitting 48
A pressing surface 64b of the presser foot 64 of the first clamp mechanism 62, a presser surface 94a of the presser foot 94 of the third clamp mechanism 92,
The pressing surface 109b of the presser foot 109 of the fourth clamp mechanism 107 presses the cap 6 from above, and the fixed arm 1 of the sixth clamp mechanism 131
At 33, the cap 6 is fixed to the pallet 10 by pressing the cap 6 against the holding fitting 48.

A control mechanism that operates the first clamp mechanism 62, second clamp mechanism 77, third clamp mechanism 92, fourth clamp mechanism 107, fifth clamp mechanism 120, and sixth clamp mechanism 131 of the pallet 10. has the structure shown in FIGS. 16 to 18. That is, in the figure, reference numeral 143 denotes a box-shaped box frame with an open top surface, which is connected to a piston rod 144a of a lift cylinder 144 that is fixed upright on a jig surface plate (not shown). It can be moved up and down by the expansion and contraction movements of.

145 are the first to fourth blocks provided on the pallet 10.
A rotary drive unit that rotates each support rod 63, 78, 93, 108 of the clamp mechanism 62, 77, 92, 107.
A lifting cylinder 146 is attached to the cylinder a, its piston rod 146a is inserted into the box frame 143, and a base plate 147 is integrally attached to the upper end of the piston rod 146a. The base plate 147 has support rods 63, 7 for the first and fourth clamp mechanisms 62, 77, 92, 107 of the pallet 10 placed on the box frame 143.
Rotating shafts 148, 1 in correspondence with 8, 93, 108
49, 150, 151 are rotatably fixed upright,
In addition, engagement grooves 65 of support rods 63, 78, 93, 108 are provided on each rotating shaft 148, 149, 150, 151,
an engagement protrusion 152 that engages with 80, 95, 110;
153, 154, and 155 are formed. 156
is a semicircular drive gear coupled to the rotating shaft 148;
157 is a first sector gear coupled to the rotating shaft 149; 158 is a second sector gear coupled to the rotating shaft 150; 159 is a driven gear provided between the driving gear 156 and the second sector gear 158; Both gears 15
It meshes with 6,158. 160 is drive gear 1
56 and the rotating lever 16 coupled to the rotating shaft 151
This is a link that connects 1 to 1. 162 is a rack provided between the drive gear 156 and the first sector gear 157 so as to be movable back and forth, and has spur teeth 163 and 164 on both sides.
One spur tooth 163 meshes with the drive gear 156, and the other spur tooth 164 meshes with the first sector gear 15.
It meshes with 7. 165 is the base plate 14
The piston rod 16 is a rotary cylinder attached to a mounting bracket 147a formed vertically in
5a is connected to rack 162. Therefore, when the rotating cylinder 165 expands and contracts to move the rack 162 back and forth, the driving gear 156 and the first sector gear 157 that mesh with the rack 162 rotate, rotating the rotating shafts 148 and 149, and simultaneously rotating the driving gear 162. 156 rotates the second sector gear 158 via the driven gear 159 to rotate the rotating shaft 150, and also rotates the rotating shaft 151 via the link 160 and the rotating lever 161 to rotate each rotating shaft 148.
The support rods 63, 78, 93, and 108 that engage with the engagement protrusions 152 to 155 of ~151 are rotated.

166 is the second, third, and fourth clamp mechanism 7
The first drive unit pushes and pulls the cams 86, 101, 116 of the box frame 1.
A drive cylinder 167 is attached to the side part 143b of the box frame 143, and its piston rod 167a is inserted into the box frame 143.
A support plate 168 is attached to the tip of 67a. The support plate 168 has cams 86 and 10.
1,116 and the combined frame 169,1
70, 171 are fixedly installed, and each engagement frame 169,
U grooves 172, 1 formed on the end faces of 170, 171
Cams 86, 101, 116 are accommodated in 73, 174 and engaged with engagement flanges 87, 102, 117. Guide rods 175 and 176 are slidably provided on the side 143b of the box frame 143 via bearings 177 and 178, and their inner ends are connected to the support plate 168, and guide the support plate 168 to the side. 143b.

Reference numeral 179 denotes a pressing cylinder provided on the side 143b of the box frame 143 in correspondence with the engagement frame 169. The piston rod 179a is inserted into the engagement frame 169 through the box frame 143 and the support plate 168, and the cam 86 facing the engagement flange 87 of. Reference numeral 180 denotes a pressing cylinder provided on the side 143b of the box frame 143 in correspondence with the engagement frame 170.The piston rod 180a is inserted into the engagement frame 170 through the box frame 143 and the support plate 168, and the cam 101 is inserted into the engagement frame 170. facing the engagement flange 102 of. 181 is a box frame 1 corresponding to the engagement frame 171.
A pressing cylinder provided on the side 143b of the box frame 1 pushes the piston rod 181a onto the box frame 1.
43 and the support plate 168 to be inserted into the engagement frame 171 so as to face the engagement flange 117 of the cam 116.

The first drive unit 166 is a drive cylinder 167
When the cams 86, 101, 116, which are engaged with the engagement frames 169, 170, 171 via the support plate 168, are shortened, the support rods 78, 9
Pulled out from 3,108. Also, the drive cylinder 167
When the is extended, the engagement frames 169, 170, 171 move forward via the support plate 168,
Subsequently, when each pressing cylinder 179, 180, 181 is extended, the piston rod 179a, 18
The cams 86, 101, 116 are pressed by the cams 0a, 181a and pushed into the support rods 78, 93, 108, respectively.

182 is a second drive unit that pushes and pulls the cam 71 of the first clamp mechanism 62;
43, the piston rod 183a is inserted into the box frame 143, and the piston rod 1 is inserted into the box frame 143.
A support plate 184 is attached to 83a. An engagement frame 185 is fixed to the support plate 184 so as to face the cam 71, and the cam 71 is inserted into a U groove 186 formed on the end surface of the engagement frame 185.
is accommodated and engaged with the engagement flange 72.
Guide rods 187 and 188 are slidably provided on the side 143c of the box frame 143 via bearings 189 and 190, and their inner ends are connected to the support plate 184.
is guided and moved parallel to the side portion 143c.
Reference numeral 191 denotes a pressing cylinder provided on the side 143c of the box frame 143 in correspondence with the engagement frame 185.The piston rod 191a is inserted into the engagement frame 185 through the box frame 143 and the support plate 184, and the cam 7 is inserted into the engagement frame 185.
1 and facing the engagement flange 72 of No. 1.

The second drive unit 182 is a drive cylinder 183
When the is shortened, the engagement frame 185 is pulled through the support plate 184, and the engagement frame 18
The cam 71 that is engaged with the cam 5 is pulled out from the support rod 63. Further, when the drive cylinder 183 is extended,
Engagement frame 185 via support plate 184
When the press cylinder 191 moves backward and then extends, the piston rod 191a presses the cam 71 and pushes it into the support rod 63.

192 is the fifth and sixth clamp mechanism 120, 1
The third drive unit pushes and pulls the cams 125 and 137 of 31, and the bottom part 143a of the box frame 143
A lifting cylinder 193 is attached to the box frame 143, and its piston rod 193a is inserted into the box frame 143, and a support plate 194 is integrally attached to the upper end of the piston rod 193a. On the support plate 194, support brackets 195 and 196 are integrally fixed upright on both sides, and the lower ends of U-shaped engagement frames 197 and 198 are placed at the upper ends of the support brackets 195 and 196 with their backs facing each other. The two engagement frames 19
Links 201 and 202 in the middle of 7 and 198, respectively.
is installed. A swing cylinder 203 is attached to the support plate 194, and its piston rod 203a projects above the support plate 194, connecting the bases of the links 201 and 202. Therefore, when the swing cylinder 203 expands and contracts, the engagement frame 1 is moved through the links 201 and 202.
97 and 198 swing around pivots 199 and 200 as fulcrums, and when standing up, the corresponding cams 125 and 13
It engages with the engagement flanges 128, 140 of No.7. 2
04,205 Bottom part 14 of box frame 143
The guide rod 3a is movable up and down via bearings 206 and 207, and its upper end is connected to a support plate 194 to guide the support plate 194 and move it parallel to the bottom 143a. 2
08 is a bottom portion 143a of the box frame 143 corresponding to the cam 125 of the fifth clamp mechanism 120.
A push-up cylinder is attached to the push-up cylinder, and its piston rod 208a is inserted into the interior through the bottom portion 143a, and a push-up member 209 is connected to the upper end. The push-up member 209 is connected to the support plate 194
The support bracket 195
A long hole 210 is arranged in the vertical direction.
A pivot 199 is inserted through the elongated hole 210. Therefore, the push-up member 209
It can be moved up and down by the telescoping action of the push-up cylinder 208 without interfering with the cam 1.
Push up 25. 211 is the sixth clamp mechanism 1
A push-up cylinder is attached to the bottom 143a of the box frame 143 in correspondence with the cam 137 of 31, and the piston rod 211a is pushed up to the bottom 143a.
is penetrated and inserted into the interior, and a push-up member 212 is connected to the upper end. The push-up member 212 is arranged in the support bracket 196 by penetrating the support plate 194 in a vertically movable manner, and has an elongated hole 213 formed in the vertical direction, and the pivot 200 is inserted through the elongated hole 213. . Therefore, the push-up member 212 is moved up and down by the expansion and contraction operation of the push-up cylinder 211 without interfering with the pivot shaft 200, and pushes up the cam 137 when raised.

The third drive unit 192 is a swing cylinder 203
The engagement frame 197,
198 rises and engages with the engagement flanges 128, 140 of the cams 125, 137, and then the lifting cylinder 193 is shortened, thereby engaging the support plate 194, the support brackets 195, 196, and the pivot shafts 199, 200. Matching frame 197,1
98 is lowered to pull down the cams 125, 137. Also, as the elevating cylinder 193 and the push-up cylinders 208, 211 extend, the cams 125, 13 are moved through the push-up members 210, 212.
Push up 7.

The above-mentioned control mechanism is arranged at the loading/unloading station k, and normally the lift cylinder 144 is in a shortened state, and the box frame 143 is placed on standby below the conveyance line of the pallet 10.
When the pallet 10 is transported above the box frame 143, the lift cylinder 14
4 extends and raises the box frame 143, lifts the pallet 10 at the upper end of the box frame 143, and clamps and fixes the pallet 10 between reference metals 214 and 215 waiting above.
At the same time, the engagement frame 16 of the first drive part 166
9, 170, 171 to U groove 172, 173, 17
4 through the second, third, and fourth clamp mechanisms 7
7, 92, 107, and the engagement frame 185 of the second drive section 182 is engaged with the cam 71 of the first clamp mechanism 62 via the U groove 186. After this, the drive cylinders 167 and 183 of the first drive section 166 and the second drive section 182 are both shortened to move the respective engagement frames 169, 170, 171, 185, and the cams 86, 101, 116, 71 to support rod 7
8, 93, 108, 63 cam holes 81, 96, 1
Pull it out from 11,66. Also, the first drive section 166
Simultaneously with the operation of the second drive section 182, the swing cylinder 203 of the third drive section 192 extends and connects the engagement frame 19 via the links 201 and 202.
The cams 125, 137 of the fifth and sixth clamp mechanisms 120, 130 are moved to stand up, respectively.
Then, the elevating sill 193 is shortened to lower the engaging frames 197, 198 in the upright position, and the cams 125, 137 are pulled out from the cam holes 124, 136 of the pressing rods 123, 135, respectively, and fixed. Arms 122 and 133 are made free.

Next, the elevating cylinder 146 of the rotary drive unit 145 extends and raises the base plate 147.
As a result, the rotating shafts 148, 149, 150, 15
1 and the engagement protrusions 15 formed thereon.
2, 153, 154, 155 in the engagement groove 65 of the support rod 63, 78, 93, 108 arranged above,
80, 95, 110, and continues to rise to lift the support rods 63, 78, 93, 108. Thereafter, the rotating cylinder 165 is extended, and the rack 162, the driving gear 156, the first sector gear 157, the driven gear 159, and the second sector gear 15
8. Rotating shafts 148 to 151 via link 160
Rotate each support rod 63, 78, 93, 108
by rotating the presser metals 64, 79, 94, 109 provided on the upper ends of the support rods 63, 78, 93, 108.
Rotate the holding fittings 46, 4 of the pallet 10.
7,48 Escape from above.

In this state, the holding fittings 46 and 47 of the pallet 10
When the connecting rod 1 is supplied upward and the cap 6 is supplied onto the holding metal fitting 48, the third drive section 192
The lifting cylinder 211 extends and raises the engagement frames 197 and 198, and then the swing cylinder 203 shortens and moves the engagement frames 197 and 1.
Lay down 98 and remove it from cams 125 and 137.
After this, the push-up cylinders 208, 211 extend and raise the push-up members 209, 212, and the push-up members 209, 212 move the cams 125, 13
7 and press the pressing parts 127, 139 into the cam holes 124, 136 of the pressing rods 123, 135, respectively.
The press rods 123 and 135 are pushed out using the tapered surfaces 126 and 138, and the press rods 1
23 and 135 press the fixed arms 122 and 133, one fixed arm 122 presses the articulated rod 1 against the holding fitting 46, and the other fixed arm 133 presses the cap 6 against the holding fitting 48 to clamp them respectively. do. Subsequently, the rotary cylinder 165 of the rotary drive unit 145 performs a shortening operation to reversely rotate the rotary shafts 148 to 151, and thereby the support rods 63, 78, 9
3,108 and presser foot 64,79,94,10
9 in the opposite direction, presser metals 64, 79, 94, 1
09 are placed above the corresponding connecting rod 1 and cap 6, respectively. Thereafter, the elevating cylinder 146 performs a shortening operation to lower the rotating shafts 148 to 151, and the engaging protrusions 152 to 155 are connected to the support rods 63, 78,
93, 108 engagement grooves 65, 80, 95, 110
extract from. Then, each support rod 63, 78, 9
3,108 is spring 68,83,93,11
Presser foot 6 is pushed down by the elasticity of 3.
4, 79, 94, 109 are pulled down, thereby pressing the pressers 64, 79, 94, 109 against the connecting rod 1 and cap 6, and temporarily clamping the connecting rod 1 and cap 6.

When temporarily clamped, the drive cylinder 167 and pressing cylinders 179, 18 of the first drive unit 166
0,181 is extended and each pressing cylinder 17
9,180,181 piston rod 179a,
The cams 86, 10 of the second, third and fourth clamp mechanisms 77, 92, 107 at 180a, 181a
1,116 and support rods 78, 93, 108
into the cam holes 81, 96, 111, and the support rods 78, 93,
Press down 108 further to press presser metals 79, 94, 1.
At step 09, the connecting rod 1 and the cap 6 are firmly clamped. Further, the drive cylinder 183 and the pressure cylinder 191 of the second drive unit 182 also extend.
The piston rod 183a of the pressing cylinder 183 presses the cam 71 of the first clamp mechanism 62 and inserts it into the cam hole 66 of the support rod 63, and further presses down the support rod 63 with its tapered surface 73 to release the presser foot 1.
At 09, the connecting rod 1 and the cap 6 are firmly clamped.

When the clamping of the articulating rod 1 and the cap 6 is completed, the lift cylinder 144 is shortened to lower the box frame 143 and return the pallet 10 onto the conveyance line, and the first and second drive parts 16
6,182 engagement frames 168, 169, 1
70,185 to cam 86,101,116,71
Remove it from below and prepare for the next operation. Thereafter, the pallet 10 is sent from the loading/unloading station k to the first reversing station a, where the connecting rod 1 and cap 6 are processed.

Note that when drilling holes in the articulated rod 1 and cap 6 clamped to the pallet 10, there are bushes 216, 217, 21 that guide the tip of the drill.
8,219 at each processing station,
It is fixedly arranged above the pallet conveyance line, and as the pallet 10 rises, the window holes 49, 50, 51,
52 and are positioned opposite to each other in front and behind the connecting rod 1 and the cap 6 to accurately guide the drill.

The clamp device 33 provided on the jig 38 of the fifth processing station f and the sixth processing station g is shown in FIGS.
a first control means 220 that pushes and pulls the cams 71 and 116 of the first clamp mechanism 62 and the fourth clamp mechanism 107; and the second and third clamp mechanisms 7.
The second cam 7,92 pushes and pulls the cam 86,101.
Third control means 221, 222 and cams 125, 13 of fifth and sixth clamp mechanisms 120, 131
Fourth and fifth control means 223, 2 for pushing and pulling 7
24, the counterbore 3 of the connecting rod 1 and the cap 6,
3, 8, and a pressing means 225 for pressing 8.

The first control means 220, as shown in FIG. side 226
Mounting brackets 227 protruding from a and 226b,
At 228, there are L-shaped first and second closing levers 22.
9 and 230 are pivotably mounted on pivots 231 and 232. The first and second closing levers 22
9,230 is the lower part 229a, 230a is the top plate 38
The upper portions 229b, 230b are arranged to protrude downward from the window holes 233, 234 opened in the upper portions 233, 234 to face the cams 71, 116, respectively.
It is inserted inward through window holes 236 and 237 opened at 226b. 238 is the upper surface 22 of the pedestal 226
6c, the piston rod 238a of which is inserted into the interior through the upper surface 226c and connected to the intermediate rod 239.
The intermediate rod 239 is connected to the upper surface 226 of the pedestal 226.
It is slidably held by a bearing 240 connected to the arm 240, and a saddle-shaped driven arm 241 is connected to the lower end of the bearing 240. Engagement holes 242 and 243 are formed in the lower portions of both sides of the driven arm 241, respectively.
Upper part 229 of second closing arm 229, 230
b, 230b has been inserted. 244 is the top plate 38 corresponding to the cam 71 of the first clamp mechanism 62.
The first opening member is slidably provided on the lower surface of a, and has a U groove 245 formed from the lower surface side into which the cam 71 is inserted at the inner end, and an opening 246 into which the lower end 229a of the first closing lever 229 is inserted on the upper surface. Furthermore, a locking hole 247 is formed in the outer end of the opening 246 in the vertical direction. Therefore, when the pallet 10 is raised, the first closing lever 2 is opened in the first opening member 244.
The lower end 229a of the cam 71 faces the cam 71, and the inner end of the first opening member 244 engages with the engagement flange 72 of the cam 71. Reference numeral 248 denotes an L-shaped release lever pivotally attached to a pedestal 249 provided on the top plate 38a with a pivot 250;
8a protrudes downward from a window hole 233 formed in the top plate 38a and is inserted into a locking hole 247 of an opening member 244. 251 is an open cylinder provided on the pedestal 249, and its piston rod 251
a is engaged with an intermediate rod 253 which is slidably held by a bearing 252 integral with the top plate 38a. A locking hole 254 is formed in the lower part of the intermediate rod 253 in the horizontal direction, and the upper end 248b of the release lever 248 is inserted into the locking hole 254. 255
is a second open member slidably provided on the lower surface of the top plate 38a in correspondence with the cam 116 of the fourth clamp mechanism 107. A U groove 256 into which the cam 116 is inserted is formed from the lower surface side at the inner end, and the upper surface An opening 257 is formed in which the lower end 230a of the second closing lever 230 enters. Therefore, when the pallet 10 is raised, the second closing lever 2 is opened in the second opening member 255.
30 and the cam 116 are opposed to each other, and the inner end of the second opening member 255 engages with the engagement flange 117 of the cam 116. The second opening member 255 is slid by an opening cylinder (not shown) provided on the lower surface of the top plate 38a.

The first control means 220 causes the second opening member to move outward by the shortening operation of the opening cylinder, thereby pulling out the cam 116 of the fourth clamping mechanism 107. At the same time, the first release cylinder 251 is shortened to pull the intermediate rod 253 upward, and the release lever 248 engaged with the intermediate rod 253 is swung counterclockwise to release the first release member 244. the first
The cam 71 of the clamp mechanism 62 is pulled out. When fixed, the release cylinder 251 extends and lowers the intermediate rod 253, and the release lever 248 swings clockwise to move the first release member 244 inward and the second release member 225 as well. move inward. Next, the first closing cylinder 238 is shortened and the driven arm 241 is raised, which causes the first closing lever 229 to swing clockwise and the second closing lever 230 to swing counterclockwise. The cams 71 and 116 of the first clamp mechanism 62 and the fourth clamp mechanism 107 are pushed in and fixed. During standby, the closing cylinder 238 extends and lowers the driven arm 241, swinging the first and second closing levers 229, 230 outward, and closing the cam 7.
1,116 has been released.

The second and third control means 221 and 222 have the same structure, and as shown in FIG. Mount 25 on the top surface of 38a
8, and an L-shaped third closing lever 260 is pivotally attached to a mounting bracket 259 protruding from a side surface 258a of the frame 258 by a pivot shaft 261. The third closing lever 260 has a lower part 260a.
is arranged to protrude downward from a window hole 262 formed in the top plate 38a and to face the cams 86, 101, and the upper part 260b is inserted inward through a window hole 263 formed in the side surface 258a. 264 is pedestal 2
A second closing cylinder attached to the upper surface 258b of the piston rod 264a of the
b and insert it inside, and insert the intermediate rod 265.
It is combined with The intermediate rod 265 is connected to the frame 2
It is slidably held by a bearing 266 attached to 58, and has a lower locking hole 267 formed therein.
The upper part 260b of the third closing lever 260 is inserted into the locking hole 267. 268 is the second and third
A third opening member is slidably provided on the lower surface of the top plate 38a in correspondence with the cams 86, 101 of the clamp mechanisms 77, 92, respectively.
Alternatively, a U-groove 269 into which 101 is inserted is formed from the lower surface side, and an opening 270 into which the third closing lever 260 is inserted is formed in the upper surface. This third opening member 26
8 is slid by an opening cylinder (not shown) attached to the top plate 38a, and as the pallet 10 rises, a third closing lever 260 is activated inside.
The lower end 260a of the cams 86 and 101 face each other.

The second and third control means 221 and 222 control the third opening member 2 when the pallet 10 rises.
68 is moved outward to pull out the cams 86 and 101 of the second and third clamp mechanisms 77 and 92, respectively, and when fixed, the third opening member 268 is moved inward and the second closing cylinder 264 is pulled out. moves to shorten and raise the intermediate rod 265, thereby swinging the third closing lever 260 counterclockwise and pushing the cams 86, 101 at the lower end 260a of the third closing lever 260. During standby, the second closing cylinder 264 is extended to lower the intermediate rod 265, thereby swinging the third closing lever 260 clockwise and away from the cams 86, 101.

The fourth and fifth control means 223 and 224 are also configured with the same structure, and the support 2 is mounted on the top plate 38a of the jig 38.
76, 276 are fixed in an upright position, and both columns 276, 27 are fixed.
A holding plate 278 is attached between the upper ends of the movable plate 283 between the support columns 276 and 276.
U-shaped opening/closing levers 273 are pivotally pivoted to mounting brackets 271 provided at respective locations by pivots 272. This opening/closing lever 273 is located at the lower part 27.
A groove 274 into which the cams 125 and 137 are inserted is formed in the groove 3a, and an upper portion 273b is disposed above the cams 125 and 137. Reference numeral 275 denotes an opening/closing cylinder attached to the center of the holding plate 278, whose piston rod 275a passes through the holding plate 278 and projects downward, and is connected to a saddle-shaped opening/closing plate 280 via an intermediate rod 279. . The opening/closing plate 280 has both lower ends 280a,
280a are arranged oppositely above the cams 125 and 137, respectively, and a locking hole 28 is provided in the upper part of the lower end 280a.
1 is formed, and the upper part of the opening/closing lever 273 is inserted into the locking hole 281. 282 is a guide rod of the opening/closing plate 280.

The fourth and fifth control means 223 and 224 are
When the opening/closing cylinder 275 shortens and raises the opening/closing plate 280, the opening/closing lever 273 swings clockwise to fit the groove 274 into the cams 125, 137 of the fifth and sixth clamp mechanisms 120, 131, respectively. . Thereafter, the movable plate 283 is raised by the opening/closing plate 280 to raise the opening/closing lever 273, thereby pulling the cams 125, 137 upward. When fixed, the opening/closing cylinder 275 is extended and the opening/closing plate 280 is lowered, which first moves the movable plate 283 and the opening/closing lever 2
73 to a predetermined position, then swing the opening/closing lever 273 counterclockwise to remove the groove 274 from the cams 125, 137, and finally lower the opening/closing plate 2.
The cams 125, 137 are pushed in at the lower end 280a of the cam 80. During standby, the opening/closing plate 280 is in the lowered position.

As shown in FIGS. 1, 4, and 5, the pressing means 225 presses the articulated rod 1 held on the pallet 10.
Pressing levers 284, 284 are provided at two locations on the top plate 38a in correspondence with the cap 6 and the top plate 38a, respectively, so as to be swingable about a pivot 285, and the lower ends 284a thereof are opposed to the articulating rod 1 and the cap 6 which are arranged upwardly. The upper end 284b is placed upward through a window hole 286 formed in the top plate 38a.
The pressing lever 284 has a lower end 284a formed in the shape of a bifurcated fork, and is adapted to press against the counterbores 3, 3, 8, 8 of the connecting rod 1 and the cap 6. 287 is the support bracket 2 on the top plate 38a
A pressure cylinder mounted at 88 has its piston rod 287a coupled to an intermediate rod 289 slidably disposed within a support bracket 288, and a pressure plate 290 is coupled to the intermediate rod 289. The pressing plate 290 has a locking hole 291 formed in the vertical direction, and the upper end 284b of the pressing lever 284 is inserted into the locking hole 291. Therefore, when the pressing cylinder 287 is extended, the intermediate rod 289 and the pressing plate 290 move forward to swing the pressing lever 284 counterclockwise, and the counterbores 3, 3, 8, 8 of the connecting rod 1 and the cap 6 are moved forward. Press. Conversely, when the pressure cylinder 287 is shortened, the pressure lever 287 swings clockwise to release the pressure.

In the above-mentioned clamping device 33, when the pallet 10 holding the connecting rod 1 and the cap 6 rises, the lower end 284a of the pressing lever 284 passes through the window holes 50, 52 of the pallet 10 and projects downward. When the pallet 10 is positioned, the opening cylinder 251 of the first regulating means 220 is shortened, and the first opening member 244 pulls out the cam 71 of the first clamp mechanism 62, and the second opening member 255 At this point, the cam 116 of the fourth clamp mechanism 107 is pulled out. At the same time, the cams 86 of the second and third clamping mechanisms 77 and 92 are
Pull out 101. Furthermore, the opening/closing cylinders 275 of the fourth and fifth control means 223 and 224 are shortened, and the opening and closing lever 273 pulls out the cams 125 and 137 of the fifth and sixth clamp mechanisms 120 and 131.

In this way, the first to sixth clamp mechanisms 62, 7
7, 92, 107, 120, 131 cams 71,
86, 101, 116, 125, 137 and weaken their clamping force, the pressing means 2
25 press cylinder 287 extends and presses the connecting rod 1 and cap 6 with the press lever 284. After this, the first to fifth control means 220, 22
Cam 71 again at 1,222,223,224,
Push in and fix 86, 101, 116, 125, and 137. In this state, the connecting rod 1 and cap 6 are processed.

Pressing cylinder 28 of pressing means 225 after completion of processing
7 performs a shortening operation to release the press by the press lever 284, and further the first to fifth control means 220 to 2
Cams 71, 86, 101, 116, 1 by 24
25, 137 is released and the pallet 10 is lowered.

If machining is performed with the press lever 284 pressed as described above, even if the thrust of the drill is applied to the articulated rod 1 and the cap 6 during machining, the press lever 284
Since deformation and distortion are prevented, highly accurate processing can be performed.

Effects of the Invention According to the present invention, in the processing station of the transfer machine, the pallet workpiece is fixed and the pallet is fixed to the jig, and the part of the workpiece to be processed is directly pressed by the pressing means. , the reaction force of the machining tool acting on the part to be machined of the workpiece can be received by the pressing means while the workpiece and pallet are kept stable;
Workpieces can be processed without causing distortion or deformation. Further, the pressing direction by the pressing means of the jig and the clamping direction of the workpiece by the presser foot of the pallet are different, and the pressing force of the presser foot can be adjusted even when the presser foot is pressed by the pressing means.

Therefore, even if the workpiece is made of flexible or brittle materials, it can be reliably clamped to suit various processing conditions, preventing distortion and deformation during processing, and achieving high-precision processing. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a clamp device according to the present invention, FIG. 2 is a sectional view of the first control means, FIG. 3 is a sectional view of the second and third control means, and FIG. 4 is a sectional view of the second and third control means. A sectional view of the fourth and fifth control means and the pressing means, FIG. 5 is a partial front view of the fourth and fifth control means, and FIG.
The figure is a plan view showing an example of a transfer machine.
Fig. 7 is a front view thereof, Fig. 8 is a side view, Fig. 9 A and B are a plan view and a front view of the workpiece (articulating rod),
Figure 10 A and B are a plan view and front view of the workpiece (cap), Figure 11 is a plan view showing an example of a pallet that holds the workpiece, and Figure 12 is Figure 11 XII-XII.
13 is a sectional view taken along the line shown in FIG. 11, FIG. 14 is a sectional view of the main part of the fifth clamp mechanism, FIG. 15 is a sectional view of the main part of the sixth clamp mechanism, and FIG. 16 is a sectional view of the main part of the sixth clamp mechanism. FIG. 17 is a plan view of a control mechanism that controls each clamp mechanism of the pallet, FIG. 17 is a longitudinal sectional front view of the control mechanism, and FIG. 18 is a longitudinal sectional side view of the control mechanism. 33... Clamp device, 220... First control means, 221... Second control means, 222... Third control means, 223... Fourth control means, 22
4...Fifth control means, 225...Press means.

Claims (1)

[Claims] 1. In a transfer machine that uses pallets to continuously transport workpieces to a plurality of processing stations arranged in processing order, and processes the workpieces at each processing station, the pallet that transports the workpieces has the following features: The processing station is equipped with a clamp mechanism that presses multiple points perpendicular to the surface to be machined of the workpiece toward the pallet using a presser foot, and a clamp mechanism that uses a fixed arm to press a part of the end surface of the workpiece opposite to the surface to be machined. The pallet fixing jig includes
A workpiece of a transfer machine, characterized in that a positioning mechanism for positioning and fixing a pallet is provided on a side surface, and a pressing means is provided on a top plate for pressing a part of the workpiece to be processed directly with a pressing lever so as to face a processing tool. clamping device.