JPH0432196Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> The invention involves swinging a rocking table between a processing position and a mounting position, and installing two sets of gripping claws on this rocking table in the vertical direction. The present invention relates to a movably guided workpiece conveyance device.

<Conventional technology> Conventionally, a workpiece transfer device that transfers a workpiece between a chuck attached to the main spindle of a grinding machine and a workpiece mounting table installed in front of the grinding machine has been used to transfer the workpiece onto the headstock. A rotating cylinder device in which a table is provided so as to be movable in a direction parallel to the spindle axis, a rotating table is pivotably supported by this moving table so as to be rotatable about an axis parallel to the spindle axis, and the rotating table is also rotated on the moving table. established,
A pair of cylinder devices are fixed to the swivel table vertically and inclined to each other, and each cylinder device is provided with an openable and closable gripping claw at the tip of a piston rod for gripping a workpiece.

<Problems to be solved by the invention> The above-mentioned method requires two cylinder devices with long strokes to move the gripping claws in the vertical direction, so there are problems in that the cost increases and the overall weight increases. Ta.

<Means for Solving the Problems> The present invention was made to solve the above-mentioned problems, and includes a rocking table drive device that swings the rocking table between the processing position and the mounting position. a pair of guide members are fixed to the rocking table vertically and inclined to each other, each guide member guides a movable table movably in the vertical direction, and each movable table has a pair of guide members for gripping a workpiece. A gripping claw is provided, an engaging member having a recess formed in a direction substantially orthogonal to the moving direction of the movable base is fixed to each movable base, and a roller that engages with the recess of each engaging member is fixed to the movable base in the moving direction of the movable base. A roller moving device for moving the engaging member in the recessed direction is provided on the rocking table.

<Operation> The oscillator drive device causes the oscillator to oscillate between the processing position and the mounting position. When the roller moving device is operated at each position, the rollers selectively engage with the recesses of the two engaging members, and the movable base on the engaged side moves up and down. At the lower end of the movable table, the workpiece is gripped or released by gripping claws.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3. Reference numeral 10 denotes a headstock of the grinding machine. A main spindle 11 is rotatably supported on the headstock 10, and a chuck 12 for gripping a round workpiece W is fixed to the tip of the main spindle 11. A support 13 is erected on the unillustrated bed of the grinding machine, and a cross beam 14 is fixed to the upper end of the support 13 above the headstock 10. A support plate 20 is fixed on the crossbeam 14, and a pair of first guide rails 21 are fixed on the support plate 20 in parallel to the axis of rotation of the main shaft 11.
A first moving table 22 is guided on the first guide rail 21 in parallel to the rotation axis of the main shaft 11.
At the rear end of the moving table 22, there is a piston rod 2 of a cylinder device 23 for the moving table placed on the support table 20.
4 are connected to each other, and a second guide rail 25 is fixed to the front end in a direction orthogonal to the first guide rail 21. A second moving table 26 is guided by the second guide rail 25, and a first roller 27 is pivotally supported on the upper part of the second moving table 26. A support shaft 28 is erected on the first moving table 22, and one end of a swing arm 29 is pivotably supported on the support shaft 28 so as to be able to turn around an axis perpendicular to the first and second guide rails 21, 25. has been done. A long groove 30 with which the first roller 27 engages is formed at the other end of the swing arm 29. Further, a swing cylinder device (swing table drive device) 31 is attached to the first movable table 22 and the swing arm 2
The piston rod 32 of the swinging cylinder device 31 has one end pivotally supported in the middle of the swing arm 29. Reference numeral 29a is a stopper that restricts the swing end of the swing arm 29.

A support shaft 33 is fixed to the second moving table 26,
A rocking table 34 is rotatably supported on this support shaft 33. An engaging member 35 is fixed to the upper end of the rocking table 34, and a second roller 36 that engages with the engaging member 35 is pivotally supported by a bracket 37 erected on the first moving table 22. . A support shaft 40 is fixed to the upper part of the swing table 34 parallel to the rotational axis of the main shaft 11, and a swivel table 41 is rotatably supported on the support shaft 40.

A rotating table driving cylinder device 43 is fixed to the front surface of the swinging table 34 via a bracket 42 substantially parallel to the second guide rail 25. A plate 44 is fixed to the rear surface of the swivel base 41 so as to protrude to both the left and right sides, and brackets 45 are fixed to the left and right sides of this plate 44, and both ends of the piston rod 46 of the cylinder device 43 for driving the swivel base are fixed to the two brackets 45. are connected. A rod 47 is connected to the two brackets 45 in parallel with the piston rod 46, and a spring receiver 48 is fixed to the rocking table 34 between the two brackets 45. A spring 49 is attached to the rod 47 between the spring receiver 48 and the two brackets 45 to return the swivel base 41 to the intermediate position.
50 is inserted. A roller moving cylinder device 51 is fixed to the front surface of the swivel table 41, and the piston rod 5 of this roller moving cylinder device 51
A third roller 53 is pivotally supported at the lower end of the rotating table 41 in parallel with the rotation axis of the rotating table 41.

A first guide member 60 and a second guide member 61 are fixed to the front surface of the rocking table 34 and are inclined at equal angles on both the left and right sides with respect to the roller moving cylinder device 51 located at an intermediate position. second guide member 60,
61 has a third guide rail (movable base) 62 and a fourth
A movable guide rail (63) is guided. U-shaped gripping bodies 64 and 65 are fixed to the lower ends of each of the third and fourth guide rails 62 and 63, and a pair of gripping claws 66 and 67 are pivotably supported on the gripping bodies 64 and 65 so as to be openable and closable. ing. Cylinder devices 68 and 69 for opening and closing the gripping claws 66 and 67 are fixed to the third and fourth guide rails 62 and 63 above the gripping bodies 64 and 65, respectively. Each gripping body 6
A first engagement member 70 and a second engagement member 71 are fixed to the front surfaces of the rollers 4 and 65, and a third roller 53 engages with each of the first and second engagement members 70 and 71. Recesses 72 and 73 are formed in the direction of rotation of the third roller 53.

Stopper members 74 and 75 are fixed to the front surfaces of the third and fourth guide rails 62 and 63, and the stopper members 74 and 75 are in contact with the left and right sides of the plate 44, and the third and fourth guide rails 62 and 63 are in contact with each other. , 63 from falling, a first abutting member 76 and a second abutting member 77 are fixed. When the swivel base 41 is in the intermediate position, each stopper member 74, 75 abuts on the first and second contact members 76, 77, and the swivel member 41 is in the third position.
When turning toward the guide rail 62 side, the stopper member 74 and the first abutting member 76 come out of contact while the stopper member 75 remains in contact with the second abutting member 77, and vice versa. When the turning member 41 turns toward the fourth guide rail 63, the stopper member 75 and the second abutting member 77 come into contact with each other while the stopper member 74 and the first abutting member 76 remain in contact with each other. The contact relationship is such that it comes off.

A bracket 78 is fixed to the second guide rail 25 side of the cross beam 14, and a workpiece mounting table 79 for supporting the workpiece W at the same height as the chuck 12 is fixed to the lower end of the bracket 78.

Next, the workpiece conveyance operation will be explained based on the above-described configuration. The rocking table 34 swings to the right, and the workpiece W gripped by the chuck 12 is completed with the workpiece W gripped by the chuck 12 unprocessed by the gripping claw 67 on the right side. Then,
The swivel base 4 is rotated by the swivel base driving cylinder device 43.
1 turns to the left, and the third roller 53 engages with the recess 72 of the first engaging member 70. Next, with the gripping claws 66 open, the roller moving cylinder device 5 is
1, when the third roller 53 is lowered, the gripping claws 66 are lowered together and grip the machined workpiece W at the lowered position. Next, the grip of the workpiece W by the chuck 12 is released, and the movable table 22 is moved forward by the cylinder device 23 for the movable table. As a result, the workpiece W is extracted from the chuck 12, and then the third
When the roller 53 is raised, the gripping claws 66 are also raised. Next, the swivel base 41 is rotated to the right by the swivel base driving cylinder device 43, and the third roller 5
3 engages from the recess 72 of the first engaging member 70 to the recess 73 of the second engaging member 71. Subsequently, the gripping claws 67 holding the unprocessed workpiece W are lowered together with the third roller 53 by the roller moving cylinder device 51. When the moving table 22 is moved backward by the moving table cylinder device 23 at the lowered position, a part of the workpiece W is inserted into the chuck 12. Next, the workpiece W is gripped by the chuck 12, and the gripping claw 67
Release the grip on the workpiece W by the . , the moving table 22 is advanced by the moving table cylinder device 23,
Subsequently, the gripping claw 67 is raised together with the third roller 53 by the roller moving cylinder device 51,
Furthermore, when the swing arm 29 is turned by the swing cylinder device 31, the second moving table 26 moves to the left. From this, the rocking table 34 is moved to the second roller 3.
6 as a fulcrum, and when the swing table 34 moves to the left, the workpiece W gripped by the chuck 12 is processed. During machining, the swivel base 41 rotates to the left, the third roller 53 engages with the recess 72 of the first engaging member 70, and the gripping claw 66 that grips the processed workpiece W is moved to the third roller. It descends with 53. Next, when the gripping claw 66 is opened, the workpiece mounting table 7 is opened.
The workpiece W is placed on 9, and the gripping claws 66 are raised. When the machined workpiece W is taken out by the worker's hand and the unprocessed workpiece W is placed on the workpiece mounting table 79, an unillustrated switch senses that the machined workpiece W is taken out by the worker's hand and the unprocessed workpiece W is placed on the workpiece mounting table 79.
1 turns to the left, and the third roller 53 engages with the recess 73 of the second engaging member 71. Subsequently, with the gripping claws 67 opened, the gripping claws 67 descend together with the third roller 53, and the unprocessed workpiece W placed on the workpiece mounting table 79 in the lowered position is transferred to the gripping claws 67.
is grasped by. Next, the gripping claw 67 is raised, the swivel base 41 is returned to the intermediate position, and the second movable base 26 is moved to the right. As a result, the rocking table 34 moves to the right using the second roller 36 as a fulcrum, and in this state waits for the machining of the workpiece W gripped by the chuck 12 to be completed. When the machining completion signal is issued, the above-described operations are repeated.

When the power is turned off and the pressure of the oil supplied to the cylinder device decreases with the gripping claws 66, 67 raised, the swivel base 41 is held at the intermediate position by the springs 49, 50, and the stopper members 74, 75 are 1. The second abutting members 76 and 77 abut against each other to prevent the gripping claws 66 and 67 from falling. If the power is turned off while one of the gripping claws 66, 67 is lowered, the second and first abutting members 77, 76 will move in the direction of maintaining the state in which they are in contact with the stopper members 75, 74 on the side that is not lowered. The swivel base 41 is pressed by the springs 49 and 50 to prevent the other gripping claw from falling.

4 and 5 show the second embodiment,
A rotary cylinder device 81 is attached to the rocking table 80, and guide bushes (guiding members 82, 83 are fixed to each other) tilted to each other on the left and right sides of the rocking table 80, and rods (movable bases) 84, 85 are attached to each guide bush 82, 83.
guide so that it can move in the vertical direction. Each rod 8
Mounting plates 86, 87 and engaging members 88, 89 are fixed to the front and rear of 4, 85. mounting plate 86,
A pair of gripping claws 90 and 91 are pivotally supported to open and close the pair of gripping claws 90 and 91, and a claw opening/closing cylinder device 92 is attached to 87. Each engaging member 88, 89
Recesses 94, 95 are formed in the direction substantially perpendicular to the moving direction of the rods 84, 85, and each recess 94, 9
5 is engaged with rollers 96 and 97. The rollers 96 and 97 are pivotally supported by a rotary plate 98, and the rotary plate 98 is rotatably driven by a rotary cylinder device 81. When the rotating plate 98 is rotated clockwise in FIG. 4, the roller 96 is disengaged from the recess 94 of the left engaging member 88, and the roller 97 is engaged with the recess 95 of the right engaging member 89. , the right gripping claw 91 descends. rotating plate 98
When rotated counterclockwise, the gripping claw 91 on the right side rises, and the roller 96 engages with the recess 94 of the engagement member 88 on the left side. The gripping claws 90, 91 are prevented from falling by springs 99, 100 provided between both sides of the upper part of the rocking table 80 and the mounting plates 86, 87.

6 and 7 show the third embodiment,
The mechanism for lifting the gripping claws 90, 91 is the same as in the second embodiment, but the mechanism for preventing the gripping claws 90, 91 from falling is different. This fall prevention mechanism
Stoppers 102 and 103 are rotatably supported on both sides of the upper part of 1, and springs 106 and 107 are provided between pins 104 fixed to the stoppers 102 and 103 and pins 105 fixed to the rocking table 101, The protrusion 114 formed at one end of the stopper 102, 103 is inserted into the recess 1 of the engagement member 108, 109.
This is done by engaging with 10. To release the fall prevention, a rotary plate 113 is attached to the rollers 111, 112 which are pivotally supported at the other ends of the stoppers 102, 103.
are brought into contact with each other, and the stoppers 102 and 103 are brought into contact with the recess 11.
This is done by turning in a direction away from zero.

It should be noted that the fourth embodiment is based on the first embodiment shown in FIGS. Spring 99, 1 of the second embodiment for fall prevention
00 may also be used.

In all cases from the first embodiment to the fourth embodiment, one cylinder device is used to move the two sets of gripping claws up and down, so there is no need to use multiple expensive cylinder devices with long strokes. Also good.

<Effects of the Invention> As described above, the present invention is provided with a oscillating table drive device that oscillates a oscillating table between a processing position and a mounting position, and a pair of guide members are attached to the oscillating table to move the oscillator up and down. the movable base is fixed in the direction and inclined to each other, each guide member guides the movable base so as to be movable in the vertical direction, each movable base is provided with a pair of gripping claws for gripping the workpiece, A roller moving device that fixes an engaging member having a recess formed in a direction substantially perpendicular to the moving direction and moves a roller that engages with the recess of each engaging member in the moving direction of the movable base and in the direction of the recess of the engaging member. Since it is installed on a rocking table, one cylinder device can move the two sets of gripping claws up and down, and there is no need to use multiple expensive cylinder devices with long strokes, reducing costs. This has the effect of reducing the overall weight.

[Brief explanation of the drawing]

Fig. 1 is a front view of a workpiece conveyance device showing a first embodiment of the present invention, Fig. 2 is a view taken in the direction of the arrow in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4. 5 is a front view of a workpiece conveyance device showing a second embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the - line in FIG. 4, and FIG. 6 is a front view of a workpiece conveying device showing a third embodiment of the present invention. A front view of the conveying device, FIG. 7 is a cross-sectional view taken along the - line in FIG. 6. 31... Swinging cylinder device, 34, 80, 1
01... Rocking table, 41... Turning stage, 43... Turning table driving cylinder device, 51... Roller moving cylinder device, 53... Third roller, 60... First guide member, 61 ...Second guide member, 62...
...Third guide rail, 64... Fourth guide rail, 66, 67, 90, 91... Gripping claw, 70...
...first engagement member, 71...second engagement member, 7
2, 73, 94, 95... recess, 81... rotary cylinder device, 82, 83... guide bush, 8
4,85...bar, 88,89,108,109...
...Engaging member, 96, 97...Roller, 98...Rotating plate.

Claims (1)

[Claims for Utility Model Registration] (1) A rocking table driving device for swinging a rocking table between a processing position and a mounting position is provided, and a pair of guide members are attached to the rocking table in the vertical direction and They are fixed at an angle to each other, and each guide member guides a movable base so as to be movable in the vertical direction. Each movable base is provided with a pair of gripping claws for gripping a workpiece. A rocking table is a roller moving device that fixes engaging members having recesses formed in substantially orthogonal directions and moves rollers that engage with the recesses of each engaging member in the moving direction of the movable table and in the direction of the recesses of the engaging members. A workpiece conveyance device characterized by being installed in. (2) The roller moving device includes a swivel base rotatably supported on a swivel base between a pair of guide members, a swivel drive device that rotates the swivel base toward each guide member, and a swivel base that is rotatably supported on a rocking base between a pair of guide members. 2. A workpiece conveying device according to claim 1, which is a registered utility model and comprises a roller moving cylinder device which is fixed to and moves the roller in a direction substantially parallel to the moving direction of the movable table. (3) The roller moving device includes a rotary plate that is rotatably supported on a rocking table between a pair of guide members and that pivotally supports the roller, and a rotary plate that is also fixed to the rocking table and rotates the rotary plate. A workpiece conveyance device according to claim 1, which is a utility model registration, and comprises a cylinder device.