JPH027005Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a palette lock device attached to an XY table of, for example, an NC machine.

(Prior art) Conventionally, the pallet locking device of the pallet changer attached to the XY table of this type of NC machine, etc., has been designed to control the pallet exchange position with respect to the pallet changer installed in parallel with the same table and the position of the pallet relative to the table. This was done by moving the guide plate up and down using a hydraulic cylinder to the fixed position.

(Problems to be Solved) Therefore, when this hydraulic cylinder is used, there are problems such as an extremely high production cost due to the expense of ancillary equipment such as a hydraulic power source and piping.

(Means for Solving the Problems) The present invention was made to solve the above-mentioned conventional problems, and provides a pallet locking device for an XY table that is inexpensive to manufacture by mechanically moving the guide plate up and down. The purpose is to
A pallet lock device attached to an XY table for inheriting and fixing pallets from a pallet changer installed in parallel to the machine, the pallet lock device comprising an elevating mechanism and a guide embedded in the upper table of the XY table. Consisting of a board,
The elevating mechanism includes a drive unit consisting of an air cylinder disposed on one side of the upper table and a rack reciprocated by the air cylinder, and a drive unit arranged at a predetermined interval on the center line of the upper table in the direction in which the pallets are carried in and out. an elevating section mainly consisting of a guide rod consisting of a guide pin and a guide cylinder provided to be able to move up and down; and a substantially triangular apex position on the drive section side with the left and right elevating sections as the bottom that engages with the rack. A drive shaft having a pinion, an intermediate shaft and a driven shaft are rotatably arranged vertically from the drive shaft toward each elevating section, and each shaft is connected by a gear train, and the driven shaft has a cylindrical groove. The guide is provided with an operating part to which a grooved cam is attached, and a roller that rolls in the groove of the cylindrical grooved cam is attached to the guide cylindrical body of the guide rod, so that the guide is horizontally installed between the guide rods by reciprocating movement of the rack. The plate is configured to be set at a pallet loading/unloading position and a pallet locking position with respect to the pallet changer.
It is located in the XY table palette lock device.

(Embodiment) Next, an embodiment of the present invention will be explained with reference to the drawings. In the figure, 1 is an NC machine, and a pallet changer 11 is installed in parallel with the NC machine 1.
The XY table 62 of the NC machine 1 is provided with interchangeable pallets 3L and 3R on which workpieces are attached.

3L and 3R are pallets, and these pallets 3L and 3R are alternately placed on the XY table 62 by the pallet changer 11, and are formed in almost the same shape, so the pallet on the left side in the figure is 3L (see Fig. 3), the upper surface of the pallet 3L has a plurality of dovetail-shaped mounting grooves 4 recessed along its longitudinal direction, and the lower surface thereof has a guide plate 68 slidable therein. A guide groove 5 to be fitted is recessed along the longitudinal direction. Further, protruding rails 6 are integrally formed on both sides of the lower surface, and an upper table 66 is formed on the lower surface.
A lock hole 7 is recessed to fit into a lock protrusion 136 formed in the lock hole 7. A connecting member 9 is attached to the side surface 8 of the pallet 3L thus formed on the pallet changer 2 side. This connecting member 9 is connected to connecting rollers 25L and 25R provided on a first changer 13 and a second changer 14, which will be described later.
The member 9 is formed in the shape of a block, and a connecting groove 10 that opens on the corresponding side surface is recessed in the lower surface side of the member 9. This connecting member 9 is attached to the left pallet 3L on its side surface 8.
It is attached at a predetermined position on the left side in the figure, and is fixed on the right side pallet 3R at a predetermined position on the right side of the side surface 8 thereof.

Next, to explain the pallet changer 11, the base 1 of this pallet changer 11 is
2 has a first changer 13 for exchanging the left pallet 3L and a second changer 13 for exchanging the right pallet 3R.
A changer 14 is installed in parallel.

Reference numeral 15 denotes an inverter-controlled motor attached to the lower surface of a board 16 that is attached to the rear side of the base 12 (on the right side in the figure) so that its position can be adjusted.
A drive shaft 18 having a drive chain wheel 19 is connected to the rotating shaft 17 of No. 5, and the drive shaft 18 is vertically supported via a bearing 20 attached to the base plate 16. The side extends upward from the base plate 16, and a first driving chain wheel 21 is keyed to the upper end thereof. In addition, a first driven shaft 22 is rotatably supported at a predetermined position on the base 12 on the XY table 62 side corresponding to the drive shaft 18, and a first drive chain wheel 21 is mounted on the same shaft 22. Correspondingly, the first driven chain wheel 23 is keyed. An endless chain 24 is hung between the chain wheels 21 and 23 arranged oppositely in this manner, and a connecting roller 25L is attached to a specific position of the chain 24. This connecting roller 25L has a support piece 26 fixed to the link plate of the chain 24, a pin 27 is integrally provided on the piece 26, and the pin 27 is formed on the connecting member 9 attached to the pallet 3L. A roller 28 that is rotatably engaged with the connecting groove 10 is pivotally mounted. In addition, this first changer 13
The guide frame 2 of the chain 24 is on the left and right of the center line C1.
Further, a guide bar 30 having a plurality of guide rollers 31 for slidingly guiding protruding rails 6 provided on both sides of the lower surface of the pallet 3L is provided on the left and right outer sides thereof. The base 1 on the driving part side of the first changer 13 formed in this way
A pallet locking mechanism 32 for the pallet 3L is disposed at the corner shown in FIG.

This pallet lock mechanism 32 is composed of a lock portion 33 and an operating lever 42. Reference numeral 34 denotes the main body of the lock portion 33, which is formed into a substantially block shape with a mounting piece.The main body 34 has holes 35 and 36 at the top and bottom thereof through which a guide pin 38 and an operating pin 39 having a flange portion 39a are inserted. A large diameter hole 36a is formed in the lower hole 36 to receive a spring 37, and the actuating pin 39 is received via the spring 37. A lock arm 4 is inserted between the pins 38 and 39 inserted into the holes 35 and 36 in this way.
0 is installed, and the same lock arm 40 is installed.
A lock pawl 41 is attached to the end of the pallet 3L to engage with a lock recess 49 of a lock member 48 fixed to the outer surface of the rear side of the pallet 3L.
The distal end side of 9 protrudes from the main body 34 by a predetermined length.

Reference numeral 42 denotes an operating lever, which is formed into a substantially L-shape, and has an arc-shaped operating surface 43 formed on its inner surface, and a stopper pin 47 protruding toward the board 16 at a predetermined position on the lower surface thereof. A locking pin 46 that abuts is formed. The mounting piece 44 side of the lever 42 formed in this way is pivotally connected to the mounting shaft 45 and is supported horizontally at the same level as the operating pin 39, and the lever 42 is pushed by the operating pin 39 to engage the locking pin. 46 is in contact with the stopper pin 47, and the operating surface 43 is connected to the connecting roller 25L as shown in the figure.
It is located inside the locus line L at the outer end of . Therefore, the chain 24 is rotated and the connecting roller 2
5L reaches the pallet lock mechanism 32, the operating lever 42 located inside the trajectory line L of the connecting roller 25L is rotated about the mounting shaft 45 in the direction of the arrow shown in the figure, thereby pushing the operating pin 39, When the connecting roller 25L passes, it returns to its original state and locks and releases the pallet 3L.

Next, the second changer 14 is constructed almost similarly to the first changer 13. That is,
A second drive shaft 50 and a second driven shaft 51 are rotatably supported on the concentric line C2 in correspondence with the drive shaft 18 and the first driven shaft 22, and a drive shaft is provided on the lower end side of the second drive shaft 50. A driven chain wheel 52 is attached to correspond to the drive chain wheel 19 formed at 18, and a second drive chain wheel 53 is attached to the upper end side, and
A second driven chain wheel 54 is attached to the second driven shaft 51 in correspondence with the second drive chain wheel 53.
An endless chain 24 with a connecting roller 25R attached thereto is hung between 3 and 54, and a guide frame 29 and a guide bar 30 are disposed on this second changer 14. Similar to the first changer 13, a pallet lock mechanism 32 is provided.

The first changer 13 and the second changer 14 arranged in this manner are linked by a drive control section 55. Reference numeral 56 denotes a tension pulley shaft, and the coaxial shaft 56 is vertically disposed on the lower surface of a base plate 57 that is provided on the base 12 at a triangular apex position between the drive shaft 18 and the second drive shaft 50 so that its position can be adjusted. , coaxial 5
6 has a driving chain wheel 19 and a driven chain wheel 52.
A tension pulley 58 is rotatably mounted in correspondence with the drive chain wheel 19 and the driven chain wheel 5.
An endless drive chain 59 is hung between the tension pulley 58 and the tension pulley 58 . This drive chain 59 has a plurality of indicators for detecting the position of the pallets 3L, 3R when exchanging the pallets 3L, 3R by the first changer 13 and the second changer 14, that is, the position of the connecting roller 25 attached to the chain 24. A dog is attached, and by detecting this dog, the low speed, high speed, stop, etc. of the inverter control motor 48 is controlled.
The first chainer 13 rotates the pallet 3L when the chain 24 is rotated clockwise by the control motor 15.
When the pallet 3L is carried into the XY table 62 and rotated to the left, the pallet 3L is carried out from the XY table 62 to the first changer 13, and also transferred to the second changer 14.
Contrary to the first chainer 13, it is configured to be carried in by rotating to the left and to be carried out by rotating to the right. Dogs are attached to the drive chain 59 in corresponding positions. That is, the first changer 13 has an origin position LP, a first acceleration/deceleration position LH1, and a second
Acceleration/deceleration position LH2, stop position LS3, escape position LE
4, and the second changer 14 is provided with an origin position RP, a first acceleration/deceleration position RH1, and a first acceleration/deceleration position RH1, respectively, at positions symmetrical to the first changer 13 as shown in the figure.
A second acceleration/deceleration position RH2, a stop position RS3, and an escape position RE4 are provided, and a dog is attached to the drive chain 59 via a mounting plate 60 corresponding to each of these positions, as shown in FIGS. 10 and 12. It is being That is, on the right side of the figure with the origin dog DP as the center, a first dog LD1, a second dog LD2, a stop dog LD3, and an escape dog LD4 corresponding to each position of the first changer 13 are installed in order at predetermined intervals. , 1st and 2nd dog LD
1. LD2 are installed at the same position, and the others are installed at different positions as shown. Also, on the left side of the origin dog DP, there is a first dog RD1 and a second dog RD corresponding to each position of the second changer 14.
2. Stop dog RD3 and escape dog RD4 are installed in sequence at predetermined intervals, and these first and second dogs
RD1 and RD2 are installed at the same position and at the same position as the first and second dogs LD1 and LD2 of the first changer 13, and the others are installed out of phase as shown. Note that the relief dog LD4 of the first changer 13 and the second dog RD2 of the second changer 14 are attached to the same mounting plate 60. A detection section 61 is provided in the center between the second drive shaft 50 and the drive shaft 18 on which the drive chain 59 to which each dog is attached is hung, and in opposition to the chain 59 .

A proximity switch for detecting each dog during the left and right rotation process of the drive chain 59 is attached to the detection section 61. That is, TP is an origin switch that detects the origin position P of the connecting roller 25 and is provided at the same position as the origin dog DP, and TH is an acceleration/deceleration switch that detects the origin position P of the connecting roller 25.
1st and 2nd dogs LD1, LD2 RD1, RD corresponding to 2 acceleration/deceleration positions LH1, LH2, RH1, RH2
It is placed at the same level as 2. Also, TL3 is the first
Use the stop switch on changer 13 to turn off the stop dog.
It is provided at a position corresponding to LD3, and TL4 is an escape switch and is also provided at a position corresponding to escape dog LD4. Further, TR3 is a stop switch of the second changer 14, and is provided at a position corresponding to the stop dog RD3.
4 is an escape switch and is also an escape dog RD4.
It is located at the corresponding position. Each proximity switch TP, TH, TL3, TL provided in this way
4, TR3, and TR4 are configured to be relayed to a PC (programmable sequence controller) to control an inverter-controlled motor 15.

Next, to explain the XY table 62 side, this XY table 62 includes a lower table 64 provided on a base 63 so as to be slidable in the Y-axis direction by, for example, a Y-axis drive shaft (not shown), and It consists of an upper table 66 that is provided on the table 64 so as to be slidable in the X direction via an 68 and a lifting mechanism 94 which lifts and lowers the guide plate 68 to fix the pallet 3 and releases the fixing to hold the pallet 3 in a changing position relative to each changer 13, 14.

68 is a guide plate of the pallet locking device 67, and the guide plate 68 is a guide plate formed on the lower surface of the pallet 3.
It is formed into a substantially rectangular plate shape, and a plurality of guide rollers 69 are pivotally attached to both left and right sides and both sides of the lower surface of the plate. Further, a lock hole 70 is provided on the lower surface of the guide plate 68 on the right side in the figure of the center line that is aligned with the center line C of the upper table 66, and is fitted with a lock pin 139 that projects on the reference line C of the upper table 66. It is being The guide plate 68 formed in this manner is attached so as to be movable up and down between the upper ends of the guide rods 110 of the elevating mechanism 94 provided at the front and rear of the reference line C of the table 66. Further, a pallet detection section 71 is provided on the left side of the guide plate 68 in the drawing.

Reference numeral 71 denotes the above-mentioned pallet detection unit, which is provided on the reference line C on the left end side of the guide plate 68 in the drawing, and a mounting hole 72 having a stepped portion 73 is provided at a predetermined position of the guide plate 68. A receiving member 74 through which a detection pin 76 is vertically movably inserted is attached to the stepped portion 73, and a ring-shaped groove portion 75 is formed between the stepped portion 73 and the receiving member 74. This detection pin 76 is formed into a stepped shaft shape with a large diameter portion 77 and a small diameter portion 78, and a flange portion 7 at the upper end of the large diameter portion 77.
9 and a spherical head 80 are formed, and a guide groove 81 of a predetermined length is recessed in the outer periphery of the large diameter portion 77 along the axis. Further, 82 is a guide member for the detection pin 76 attached to the upper table 66 side, and the guide member 82 is formed with a hole 83 through which the large diameter portion 77 of the detection pin 76 is slidably inserted. , a receiving hole portion 84 through which the small diameter portion 78 is inserted is formed at the lower end side of the hole 83, and this receiving hole portion 84
A spring 85 is interposed between the large diameter portion 77 and the detection pin 76 so that the detection pin 76 is always urged upward.
The head 80 of the guide plate 68 is fixed so as to protrude upward from the upper surface of the guide plate 68. Further, a detection portion 86 having a slightly smaller diameter is integrally formed on the lower end side of the small diameter portion 78 . Further, a hole 8 is provided on the upper surface side of the guide member 82.
A ring-shaped convex part 87 is formed to fit into the ring-shaped groove part 75 which is concentric with the member 82, and a screw 88 whose tip is directed into the guide groove 81 is screwed onto the side of the member 82. Further, a proximity switch 89 is provided on the upper table 66 side to confirm the placement of the pallet 3 when the pallet 3 is placed on the guide plate 68 and the detection pin 76 is lowered. It is being

Reference numeral 94 denotes an elevating mechanism, which is embedded in the upper table 66. The upper table 66 has a recess 91 that opens upward in order to accommodate the elevating mechanism 94. A table main body 90 and a lid body 93 having a protruding part 92 at the part thereof.
The elevating mechanism 94 is formed by the table main body 9.
Symmetrical positions P1, P on the reference line C of the drive unit 95 attached to the protrusion 92 of 0 and the upper table 66
The elevating section 103 provided in 2 and this drive section 95
and the operating section 124 disposed between the elevating section 103 and the elevating section 103.
It is composed of. Note that this operating section 124
are arranged almost symmetrically from position P3 to positions P1 and P2 of both elevating parts 103, so P3 and P2
Let me explain about the time.

Reference numeral 96 denotes a mounting member attached to the wall portion 92a on the left side of the protrusion 92 in the figure, and an insertion hole 97 is provided through the attachment member 96, and an air cylinder 98 is attached to the attachment member 96. ing.
Further, a guide member 99 having a guide hole 100 is attached to the wall portion 92b on the right side of the protrusion 92 in the figure, with the center of the guide hole 100 aligned with the center of the insertion hole 97 of the mounting member 96. ,9
A rack 101 is slidably inserted and supported between the air cylinders 9 and 9, and one end of the rack 101 is connected to the rod 98 of the air cylinder 98 via a connecting member 102.
It is removably attached to a.

Reference numeral 103 denotes an elevating section provided at positions P1 and P2 on the reference line C, and in this elevating section 103, a hole 104 of a predetermined diameter is provided through the bottom of the table body 90, centered at the positions P1 and P2. , same hole 1
04 is fitted with a metal 105. Also,
The lid body 93 has holes 10 centered at positions P1 and P2.
A hole 106 of a predetermined diameter is provided concentrically with the hole 4 .
In addition, this hole 106 has a concentric hole 108 with a predetermined diameter.
A lid member 107 having a hole 108 is attached, and the hole 108
A metal 109 is fitted into the hole. A guide rod 110 is mounted between the metals 105 and 109 in the hole thus formed so as to be movable up and down.

110 is the above-mentioned guide rod, and the guide rod 110 is composed of a guide pin 111 and a guide cylinder 116, and the guide pin 111 has first to fourth step portions 112 to 115.
12 is slidably fitted into the metal 109, and a guide cylinder 116 is keyed to the second step portion 113. This guide cylinder 116 has a hole 117 that fits into the second step part 113 and a large diameter hole 118 at the bottom of the hole 117. A shaft 120 on which a roller 119 that rolls in a groove 135 of a grooved cam 134 is pivotally mounted is detachably attached.
Further, the third step portion 114 includes a plurality of disc springs 121.
are inserted in the shape of palms together as shown in the figure, and the spring retainer 122 is inserted.
is inserted, a nut 123 is screwed onto the threaded portion at the lower end of the third step, and the guide cylinder 116 is pressed against the first step 112. A guide plate 68 is attached via screws between the guide rods 110 attached in this manner. An operating section 12 is provided between the lifting section 103 and the drive section 95 thus provided.
4 are arranged.

Reference numeral 125 denotes a drive shaft of the actuating section 124, which is installed perpendicularly to the rack 101 of the drive section 95 and at a position P3 approximately at the apex of the triangle with respect to the position of the elevating section 103. An intermediate shaft 126 and a driven shaft 127 are arranged toward the
This drive shaft 125 is connected to the bottom 90 of the table main body 90.
The drive shaft 125 is rotatably supported vertically between the cover member 128 attached to the cover member 93, and a pinion 129 that meshes with the rack 101 and a drive gear 130 are keyed to the drive shaft 125. In addition, the intermediate shaft 12
6 is rotatably supported between the lid body 93 and the bottom portion 90a, and an intermediate gear 131 that meshes with the drive gear is attached to the coaxial shaft 126. Also,
The driven shaft 127 is rotatably supported between the bottom portion 90a and a lid member 132 attached to the lid body 93,
A driven gear 133 that meshes with an intermediate gear 131 is attached to the coaxial shaft 127, and a cylindrical grooved cam 134 having a groove portion 135 for moving the guide rod 110 up and down is keyed to the coaxial shaft 127. When the rod 98a of the air cylinder 98 of the elevating mechanism 94 formed in this way is shortened, the elevating mechanism 94 becomes rack 1.
01, the guide rods 110 are raised by the cylindrical groove cams 134, and the guide plates 68 attached between the guide rods 110 are also integrally raised.
is the first chainer 13 or the second chainer 1
When the rod 98a is extended, the guide rod 110 is lowered to lock the pallet 3. In addition, lock convex portions 136 that fit into the lock holes 7 of the pallet 3 are formed at diagonal positions on the upper left side and lower right side in the figure of the upper surface of the upper table 66, and the pallet 3 is mounted on the upper surface of the upper table 66. For horizontal support, a plurality of (six in this example is illustrated) supporting convex portions 137 having horizontal reference planes 138 aligned at the same level are protruded.

In the figure, 140 and 141 are attached to the air cylinder 98, and reed switches 142 and 143 are attached to the lock protrusion 136 and the support protrusion 137, respectively, to confirm the vertical movement of the guide rod 110 when the left and right movement of the cylinder piston is detected. This is an air hole for blowing away cutting waste and the like when the pallet 3 is placed on the upper table 66.

Next, the operation and effects of this embodiment configured as described above will be explained.

Now, at the beginning of operation of NC machine 1, pallet 3
L and 3R are located on the first changer 13 and the second changer 14, respectively, and are locked by the pallet lock mechanism 32, and in this state, the connecting rollers 25 are respectively on standby at the original position P. When the XY table 62 is moved to, for example, the front part of the first changer 13 and is on standby, the pallet loading/unloading program in the program is input and the air cylinder 98 is shortened, and the rack 101 is moved back at the same time. The pinion 129 that meshes with the rack 101 is rotated, and the drive shaft 125 is also rotated together. Due to this rotation of the drive shaft 125,
Gear train 13 toward positions P1 and P2 from coaxial 125
0, 131, and 133 are rotated, and the cylindrical grooved cam 134 attached to the driven shaft 127 is also rotated, and the guide rod 110, which is connected to this cylindrical grooved cam 134 via the roller 119, is raised and placed between the guide rods 110. The attached guide plate 68 is raised and held at a position aligned with the guide bar 30 of the first changer 13. This raising of the guide plate 68,
That is, when the operation of the air cylinder 98 is confirmed by the reed switch 140, the first loading program on the program is input and the control motor 15 is activated.
is rotated clockwise at low speed and the first and second changer 1
The 3rd and 14th chains 24 are also rotated clockwise (in the direction of the solid arrow in the figure) at the same time. With this rotation, the connecting roller 25 of the first changer 13 is rotated toward the first acceleration/deceleration position LH1, and in this process, the connecting roller 25 of the first changer 13 is rotated toward the first acceleration/deceleration position LH1.
By pushing the operating lever 42 of the pallet lock mechanism 32 disposed within the rotation locus line L of the pallet 3L, the lock pawl 41 provided on the lock arm 40 and the lock member 48 fixed to the outer surface of the rear side of the pallet 3L are locked. At the same time as releasing the lock from the recess 49, the connecting roller 25 rolls into engagement with the connecting groove 10 of the connecting member 9 attached to the rear part of the pallet 3L.
When it reaches the first acceleration/deceleration position LH1, the first dog LD1 provided in the drive chain 59 is turned ON in opposition to the acceleration/deceleration switch TH, which causes the inverter control motor 15 to rotate at high speed and connect. The roller 25 is accelerated and the pallet 3L is pushed toward the XY table 62. In this case, the guide plate 68 provided on the XY table 62 is raised by the lifting mechanism 94 and held at a position where it slidably fits into the guide groove 5 of the pallet 3L, that is, at the same position as the guide bar 30. The pallet 3L is moved from the guide bar 30 toward the guide plate 68 by the pushing of the connecting roller 25, and when the connecting roller 25 reaches the second acceleration/deceleration position LH2, the second dog LD2 disposed on the drive chain 59 switches the acceleration/deceleration switch. The control motor 15 is switched from high-speed rotation to low-speed rotation, and the connected roller 2
5, stop dog LD3 turns on stop switch TL3
Advance pallet 3L until When the stop dog LD3 turns on the stop switch TL3, the control motor 15 is stopped and the connecting roller 25 is stopped at the stop position LS3. In this state, pallet 3L
is transferred onto the XY table 62, and the detection pin 76 of the pallet detection unit 71 projected on the guide plate 68 is moved down and the proximity switch 89 is activated.
It is turned ON and the transfer of pallet 3L is confirmed. As a result, the air cylinder 98 is extended and the guide plate 68 is lowered, so that the lock hole 70 formed on the lower surface of the guide plate 68 and the lock pin 139 protruding from the upper surface of the table 66 are fitted, and the pallet is The lock hole 7 formed on the lower surface of 3L and the lock protrusion 136 protruding from the upper table 66 are fitted and positioned, and the lower surface is brought into contact with the reference surface 138 of the six support protrusions 137. The pallet 3L is then clamped horizontally. As a result, the control motor 15 rotates clockwise again at low speed, and the roller 28 of the connecting roller 25 rolls within the connecting groove 10 of the connecting member 9 and leaves the groove 10. When the control motor 15 reaches the escape position LE4, the drive chain 59 escapes. The escape dog LD4 turns on the escape switch TL4, whereby the control motor 15 is stopped and the connecting roller 25 is stopped and on standby at the escape position LE4. When the lowering of the guide plate 68, that is, the extension operation of the air cylinder 98 is confirmed by the reed switch 141, the carrying-in cycle of the pallet 3L is completed.
The XY table 62 becomes operational.

Next, when the processing with the NC machine is completed and the XY table 1 is moved to the front of the first changer 44 and is on standby, the first unloading program on the program is input and the control motor 15 is rotated counterclockwise at low speed. 1. Chain 24 of second chainers 13 and 14
is also rotated to the left (as shown by the two-dot chain arrow in the figure), and the connecting roller 25 of the first chain gear 13 rolls into engagement with the groove 10 of the connecting member 9 during the rotation process from the escape position LE4 to the stop position LS3, and the drive chain 59 stop dog
When LD3 turns on stop switch TL3, control motor 15 stops, and connecting roller 25 moves to stop position LS.
It is stopped at 3. Then, the connecting roller 25
0, the air cylinder 98 is shortened as in the case of pallet loading, and the rack 101 is moved back accordingly.
1 is rotated and the pinion 129 meshing with the drive shaft 1
25 is also rotated together. Due to this rotation of the drive shaft 125, the gear trains 130, 131, 133 moving from the same shaft 125 toward positions P1, P2 are rotated, and the cylindrical groove cam 134 attached to the driven shaft 127 is also rotated. The guide rod 110 connected via the roller 119 is raised and the pallet 3L is unlocked by the guide plate 68. This raising of the guide plate 68, that is,
The operation of the air cylinder 98 is caused by the reed switch 140.
When this is confirmed, the control motor 15 is rotated to the left again at low speed, and the connecting roller 25 is rotated from the stop position LS3 to the second acceleration/deceleration position LH2 while connected to the connecting member 9 of the pallet 3L. When the second dog LD2 of the drive chain 91 turns on the acceleration/deceleration switch TH, the control motor 15 is switched to high speed rotation, the connecting roller 25 is accelerated, the pallet 3L is carried out to the first changer 13 side, and the connecting roller 25 is the first acceleration/deceleration position LH1
When it reaches , the first dog LD1 switches the acceleration/deceleration switch TH.
is turned on, the control motor 15 is switched from high speed to low speed, and the connecting roller 25 is rotated at low speed until the origin dog DP turns on the origin switch TP. When the operating lever 42 of the pallet lock mechanism 32 disposed within the rotation locus line L of the connecting roller 25 is pushed into sliding contact, the lock arm 40 is pushed sideways, and the lock arm 40 is removed from sliding contact with the operating lever 42. , that is,
When the connecting roller 25 is disengaged from the connecting member 9, it is returned to its original state by the restoring force of the spring 37, and the lock pawl 41 provided on the arm 40 and the outer surface of the rear side of the pallet 3L are engaged. The pallet 3 is engaged with the lock recess 49 of the fixed lock member 48.
L is locked. The connecting roller 25 is stopped at the home position LP when the home dog DP turns on the home switch TP. This will result in palette 3
One cycle of loading and unloading L is completed.

Note that the loading and unloading of the pallet 3R to and from the XY table 62 in the second changer 14 is symmetrical to the rotation direction of the connecting roller 25 of the first changer 13, that is, the pallet 3R is rotated in the opposite direction. Since it is the same as the changer 13, the explanation will be omitted.

In this way, the pallet lock device 67 of this embodiment
It is attached to the XY table 62 for inheriting and fixing the pallet 3 from the pallet changer 2 installed in parallel with the NC machine 1, and the pallet locking device 67 is attached to the upper table 6 of the XY table 62.
The lifting mechanism 94 includes a lifting mechanism 94 embedded in the upper table 6 and a guide plate 68.
A drive unit 95 is composed of an air cylinder 98 disposed on one side of the pallet 6 and a rack 101 reciprocated by the air cylinder 98, and a predetermined position is placed on the center line C of the upper table 66 in the loading/unloading direction of the pallet 3. An elevating section 103 whose main body is a guide rod 110 consisting of a guide pin 111 and a guide cylinder 116, which are vertically movably provided at positions P1 and P2 separated by an interval.
At a substantially triangular apex position P3 on the driving part 95 side with the left and right lifting parts 103 as the bottom, there is a drive shaft 125 having a pinion 129 that meshes with the rack 101, and a drive shaft 125 that has a pinion 129 that meshes with the rack 101, and a drive shaft 125 that extends toward each of the lifting parts 103 from the drive shaft 125. A cylindrical grooved cam 1 has an intermediate shaft 126 and a driven shaft 127 rotatably arranged vertically, each shaft 125, 126, 127 being connected by a gear train 130, 131, 133, and having a groove 135 on the driven shaft 127.
34 is installed, and
A roller 119 that rolls in a groove 135 of a cylindrical grooved cam 134 on the guide cylinder 116 of the guide rod 110.
A guide plate 68 is installed horizontally between the guide rods 110 by the reciprocating movement of the rack 101.
is set at the loading/unloading position of the pallet 3 with respect to the pallet changer 2 and the locking position of the pallet 3. Therefore, according to the pallet locking device 67 of this embodiment, by operating the drive section 95, the guide rods 110 disposed at positions P1 and P2 can be moved up and down in synchrony via the left and right operating sections 124. As a result, the loading and unloading positions of the pallet 3 can be set to align with the guide bar 30 of the pallet changer 2, and the locking position of the pallet 3 can be set, so conventional hydraulic equipment, piping, and hydraulic power sources can be eliminated. In addition to being economical and capable of reducing manufacturing costs,
It has many features such as extremely easy maintenance and inspection.

(Effect of the invention) Now, this invention is a system for inheriting and fixing pallets from a pallet changer installed in parallel with an NC machine.
A pallet lock device attached to an XY table, the pallet lock device comprising an elevating mechanism and a guide plate embedded in the upper table of the XY table, the elevating mechanism being disposed on one side of the upper table. a drive unit comprising an air cylinder and a rack reciprocated by the air cylinder; a guide pin and a guide cylinder provided so as to be movable up and down at predetermined intervals on the center line of the upper table in the direction in which the pallets are carried in and out; an elevating section mainly consisting of a guide rod, a drive shaft having a pinion that engages with the rack at a substantially triangular apex position on the driving section side with the left and right elevating sections as the bottom, and a drive shaft that connects each elevating section from this drive shaft. An intermediate shaft and a driven shaft are rotatably arranged vertically, and each shaft is connected by a gear train, and the driven shaft is provided with an actuating section to which a cylindrical grooved cam having a groove is attached. A roller that rolls in the groove of the cylindrical grooved cam is attached to the guide cylinder, and the reciprocating movement of the rack moves the guide plate horizontally installed between the guide rods to the pallet loading/unloading position with respect to the pallet changer. By activating the drive unit 95, the guide rods 110 disposed at positions P1 and P2 are set at the positions P1 and P2 via the left and right operation units 124.
can be moved up and down in synchronization, and the pallet 3 loading/unloading position and the pallet 3 locking position can be set to align with the guide bar 30 of the pallet changer 2. ,
It is economical to reduce manufacturing costs by eliminating piping and hydraulic power sources, and maintenance and inspection are extremely easy.
This is an extremely practical idea as a pallet locking device for a table.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG.
The front view of the machine and the pallet changer connected, Figure 2 is a plan view of the XY table, and Figure 3 is the top view of the XY table.
A partial sectional view of the XY table, Figure 4 is a sectional view taken along the - line in Figure 2, Figure 5 is an enlarged sectional view of the table elevation detection section, Figure 6 is a sectional view taken along the - line in Figure 2, and Figure 7 is a plan view of the pallet changer, FIG. 8 is a partially cutaway front view, FIG. 9 is a sectional view of the drive section, FIG. 10 is a schematic plan view of the drive control section, and FIG. 11 is a detection section. 12 is a diagram of the dog arrangement, FIG. 13 is an explanatory diagram of the control position during the rotation process of the connecting roller, and FIGS. 14 to 18 are explanatory diagrams of the operation. 1...NC machine, 3...Pallet, 11...Pallet changer, 62...XY table, 66
... Upper table, 67 ... Palette lock device, 68 ... Guide plate, 94 ... Lifting mechanism, 95
...Drive unit, 98...Air cylinder, 101...
Rack, 103... Lifting part, 110... Guide rod, 111... Guide pin, 116... Guide cylinder, 119... Roller, 124... Operating part, 1
25... Drive shaft, 126... Intermediate shaft, 127...
Driven shaft, 129... Pinion, 130... Drive gear, 131... Intermediate gear, 133... Driven gear,
134...Cylindrical groove cam, 135...Groove portion.

Claims (1)

[Scope of utility model registration request] A pallet lock device is attached to an XY table for inheriting and fixing pallets from a pallet changer installed in parallel with an NC machine, and the pallet lock device includes a lifting mechanism embedded in the upper table of the XY table. The elevating mechanism includes a drive section consisting of an air cylinder disposed on one side of the upper table and a rack reciprocated by the air cylinder, and a drive section that moves the pallets in and out of the upper table. An elevating section mainly consisting of a guide rod consisting of a guide pin and a guide cylinder provided vertically movably at predetermined intervals on the center line, and a substantially triangular apex position on the drive section side with the left and right elevating sections as the bottom. The drive shaft has a pinion that meshes with the rack, and an intermediate shaft and a driven shaft are rotatably arranged vertically from the drive shaft toward each lifting section, and each shaft is linked by a gear train, and the driven shaft is provided with an operating part to which a cylindrical grooved cam having a groove is attached, and a roller is attached to the guide cylinder of the guide rod that rolls in the groove of the cylindrical grooved cam, so that the reciprocating movement of the rack causes a horizontal movement between the guide rods. 1. A pallet locking device for an XY table, characterized in that said guide plate mounted in a shape is set at a pallet loading/unloading position with respect to said pallet changer and a pallet locking position.