JPH0790441B2 - Workpiece loading / unloading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a machine for carrying an unmachined work piece such as a connecting rod of an internal combustion engine into a processing machine and carrying out a machined work piece from the processing machine. The present invention relates to a loading / unloading device.

[Prior art]

An example of this type of work loading / unloading device is shown in FIG. This is a loading station S1 and an unloading station S3 before and after the processing station S2 for processing the workpiece W by the processing machine M.
Is provided, and a transfer device (not shown) is provided between the stations. In this workpiece loading / unloading device, the unprocessed workpieces W sent in a horizontal state by a chute or the like are put together by the loading device of the loading station S1 as shown in A, and then stand up. Supported by a transfer device, and is transferred to the processing station S2 by this transfer device. Two workpieces W simultaneously processed by the processing machine M are unloading station by the transfer device.
They are carried out to S3, removed from the transfer device by an unloading device, placed in a horizontal state, and then sent to the next process one by one.

[Problems to be solved by the invention]

In such a work loading / unloading device, the stations S1 and S3 for loading and unloading are required before and after the processing station S2, so that the installation space of the device becomes large and the loading and unloading device is required. Therefore, there is a problem that the device becomes complicated and the equipment cost increases. The present invention is intended to solve such a problem.

[Means for solving problems]

To this end, the workpiece loading / unloading device according to the present invention is
As illustrated in FIG. 5 to FIG. 5, in the workpiece carry-in / carry-out device that carries in the unprocessed workpiece that is conveyed to the processing machine 15 and carries out the processed workpiece from the processing machine 15, A conveyor 11 that supports and conveys the workpiece in parallel with the front surface of the processing machine 15, and is rotated above the conveyor and in front of the processing machine 15 around an axis parallel to the conveyance direction of the conveyor. A rotating body 20 supported by the outer frame 13 and a first movable body 20 movably provided in a direction orthogonal to the axis and having a phase difference of 90 degrees with respect to each other, and are driven forward and backward by a predetermined distance. And second supporting members 30, 40, a gripping device 50 provided on each of the first and second supporting members for detachably gripping the workpiece W, and the rotating body 20 for rotating 90.
Indexing device 60 for positioning in three positions with a phase difference of 60 degrees
And the first and second supporting devices 30 and 40 transfer the workpiece W between the conveyor 11 and the processing machine 15 via the gripping device 50. It is a thing.

[Action]

In the standby state, the first and second support members 30 and 40 provided on the rotating body 20 are on the conveyor 11 side and the processing machine 15 respectively.
When the machining of the workpiece W is completed, the second support member 40 advances and the grasping device 50 grasps the machined workpiece and retreats, so that the first support member 30 and its The gripping device 50 operates at the same time or before the same to grip the unprocessed workpiece W on the conveyor 11 and retract it. Next, the indexing device 60 rotates the rotating body 20 to index the first supporting member 30 to the processing machine 15 side, and in this state, the first supporting member 30
The support member 30 moves forward to support the unprocessed workpiece W held and held by the processing machine 15 and release the grip of the gripping device 50 before retracting. Next, the indexing device 60 rotates the rotating body 20 again to index the second supporting member 40 to the conveyor 11 side, and in this state, the second supporting member 40 advances and holds the processed workpiece W grasped. It is placed on the conveyor 11 and the gripping device 50 is released, and then it is retracted. Then, the indexing device 60 further rotates the rotating body 20 to index both the support members 30, 40 to the standby position. In this state, the conveyor 11 sends the processed work W to the next step, and also sends the unprocessed work W to a position corresponding to the first support member 30 and stops.
The cycle loading / unloading is completed.

〔The invention's effect〕

According to the above invention, the unprocessed workpiece conveyed by the conveyor is carried into the processing machine by the operation of the first and second support members and the gripping device provided on the rotating body located in front of the processing machine. At the same time, since the processed workpiece is carried out on the conveyor, it is not necessary to provide a device and a station for loading and unloading before and after the processing machine in the conveyance direction of the workpiece. Therefore, the work loading / unloading device is simplified as a whole and the installation space is reduced, so that the equipment cost can be reduced.

〔Example〕

The present invention will be described below with reference to the embodiments shown in FIGS. In this embodiment, two connecting rods are simultaneously carried in and out of the processing machine. As shown in Fig. 1, the processing machine
15 is a processing unit support 16 fixed on the bed 10,
The processing unit 17 is movably supported on the processing unit support base 16 so as to be movable in the front-rear direction orthogonal to the front surface 15a of the processing machine 15, and the workpiece mounting base 18 fixed on the bed 10. 17 moves forward to process the workpiece (connecting rod) W supported by the support jig 19 of the workpiece mount 18. As shown in FIGS. 1 and 3, an outer frame 13 composed of a pair of left and right supporting plates is fixed to both sides of the work mount 18 so as to project forward and fixed on the bed 10 below the outer frame 13. A conveyor 11 that supports the workpiece W and conveys it in a direction parallel to the front surface 15a of the processing machine 15 is provided. Conveyor
As shown in FIG. 2, the workpiece 11 is a workpiece which is moved forward and backward according to predetermined conditions and is stopped by a predetermined one of the workpieces W conveyed by the conveyor 11 and the other workpieces are passed therethrough. An object stopper 12 is provided.

As shown in FIGS. 1 to 3, a rotating body 20 is supported on the outer frame 13 so as to be rotatable around an axis parallel to the conveying direction of the conveyor 11. The rotating body 20 is supported by the left and right supporting plates of the outer frame 13 via the shaft portions 21 and 22 formed at both ends thereof, and is indexed by the indexing device 60 described later into three positions having a phase difference of 90 degrees. It has become.

As shown in FIGS. 2 to 4, the rotating body 20 is movable in the directions orthogonal to the axis of the rotating body 20 and having a phase difference of 90 degrees from each other. 40 is supported and is driven forward and backward by the forward and backward drive device 24 built in the rotating body 20. The first support member 30 includes a substrate 31, a first guide bar 32 and a first guide bar 32, which are provided on one side of the substrate 31 in parallel with each other.
Rack bar 33 and two sets of columns standing on the other side of the board 31
It is composed of 34 and 35. The second support member 40 is the second
The mounting positions of the second guide bar 42 and the second rack bar 43 with respect to the board 41 in the longitudinal direction are different from those of the first supporting member 30, and the other geometrical dimensions are the same as those of the first supporting member 30.
The rotating body 20 has a first support guide tube in a direction orthogonal to its axis.
37 and the first rack guide cylinder 38 are offset-fixed, and the second support guide cylinder 47 and the second rack guide cylinder 48 are also offset-fixed at right angles to both guide cylinders 37, 38. The guide tubes 37 and 38 are slidably fitted with the bars 32 and 33, respectively, and the guide tubes 47 and 48 are slidably fitted with the bars 42 and 43, respectively. Support member
30, 40 are guided and supported by the rotating body 20 so as to be movable in a direction orthogonal to the rotating axis and having a phase difference of 90 degrees from each other. The columns 34 and 44 and 35 and 45 are arranged on the same plane orthogonal to the axis of the rotating body 20, and the columns of the columns 34, 35, 44 and 45 have holes at both ends of the connecting rod W which is a workpiece. The small-diameter portion 34 that is fitted to the and is positioned during gripping by the gripping device 50 described later.
A, 35a, 44a, 45a are formed. In the present embodiment, the columns 34, 35, 44, 45 are offset in the same direction as the guide bars 32, 42 and the rack bars 33, 43 with respect to the axis of the rotating body 20. For example, since the interference of each part when the support members 30 and 40 move forward and backward is mitigated, the whole can be made relatively compact.

An advancing / retreating drive device 24 for advancing and retracting both support members 30, 40
2 to 4, the drive shaft 25 is coaxially and rotatably supported in the rotating body 20, and the forward / backward moving cylinder 28 is offset and fixed orthogonally to the rotating body 20. The drive shaft 25 includes a plunger 29 having rack teeth 29a engaged with the small-diameter pinion 26 formed in the drive shaft 25, and the drive shaft 25 includes rack teeth 33a of the first and second rack bars 33, 34. Four
A large diameter pinion 27 that meshes with 3a is formed. Rotating body
By supplying the working fluid alternately to both chambers of the advancing / retreating cylinder 28 from a distributor 23 provided at one end of the shaft portion 22 of 20 through a passage (not shown), both supporting members 30 and 40 are simultaneously moved in respective moving directions. Driven back and forth.

As shown in FIGS. 2 to 4, the first and second support members 30, 4
A gripping device 50 that detachably grips the workpiece W is provided on each of the substrates 31 and 41 of 0. The gripping device 50 has two columns 34, 3
A pair of L-shaped gripping claws 54 pivotally supported by pins 55 on a support body 53 fixed to the substrates 31, 41 between 5,44, 45, each gripping claw 54 having one end 54a. Groove 5 at the end of actuating rod 52
2a are engaged with each other and are opened and closed by moving the operating rod 52 forward and backward.
3, two sets of grip claws 54 and operating rods 52 are provided. The substrates 31 and 41 are provided with a gripping cylinder 58 located between both operating rods 52 and having an axis parallel to the operating rods 52. Both ends of the interlocking member 51 fixed to the tip of the piston rod are provided with springs 56. It is connected to the rear part of each operating rod 52. When the gripping cylinder 58 operates in the contracting direction, the respective operating rods 52 advance, the gripping claws 54 open, and the workpiece W is supported by the columns 34,3.
When the gripping cylinder 58 operates in the extending direction, the respective working rods 52 retract, the gripping claws 54 close, and the workpiece W positioned on the columns 34, 35, 44, 45 is detachable. The middle part of is grasped. In the gripped state,
As is apparent from FIG. 4, the gripping force of the gripping claw 54 is given by the elastic force of the spring 56. Similar to the advancing / retreating cylinder 28, the working fluid is supplied to each gripping cylinder 58 through the distributor 23 and a passage not shown.

Next, the indexing device 60 for rotating the rotating body 20 to position it at three positions having a phase difference of 90 degrees will be described mainly with reference to FIGS. 2 and 5. A pinion 62 is integrally provided at the tip of one shaft portion 21 of the rotating body 20, and a casing 61 surrounding the pinion 62 and provided with an indexing cylinder 63 is fixed to the outer frame 13. A plunger 64 having a rack tooth 64a that meshes with the pinion 62 is fitted into the shaft. If the working fluid is alternately supplied to both chambers of the indexing cylinder 63 and the plunger 64 is moved to the full stroke, the rotating body 20 reciprocally rotates within a range slightly exceeding 180 degrees. This reciprocating rotation of the rotating body 20 causes a stopper cam 65 fixed to the shaft portion 21, a stopper 70a provided on the swing lever 66 and two stoppers 70b provided on the bracket 60 fixed to the outer frame 13, It is positioned at three positions with a phase difference of 90 degrees with 70c. A swing lever 66 rotatably supported by a support pin 67 fixed to the outer frame 113 has a projection 66a at one end thereof supported by the outer frame 13 and a tip member 68 of a piston rod of a switching cylinder 68.
It is connected to a and the stopper 7 is
0a swings between a lower position (see FIG. 5) where it can abut the abutment surface 65a of the stopper cam 6 and an upper position where the abutment is not performed.

As shown in FIG. 5, when the swinging lever 66 is at the lower position and the rotary body 20 is indexed to the standby position where the contact surface 65a of the stopper cam 65 contacts the stopper 70a, the rotary body 20 is indexed as shown in FIGS. As shown in FIG. 4, the first support member 30 is indexed to the conveyor 11 side, and the second support member 40 is indexed to the processing machine 15 side. From this state, the piston rod of the switching cylinder 68 is contracted to bring the swing lever 66 to the upper position, and the working fluid is supplied to the right chamber of the indexing cylinder 63 shown in FIG.
20 rotates counterclockwise and contacts the stopper cam 65.
65a contacts the stopper 70b and is indexed to the carry-in position.
In this state, the first support member 30 is indexed toward the processing machine 15, and the second support member 40 is at the upper position shown by 40A in FIG. In this state, if the working fluid is supplied to the left chamber of the indexing cylinder 63, the rotating body 20 rotates clockwise, and the contact surface 65b of the stopper cam 65 contacts the stopper 70c to be indexed to the carry-out position. . In this state, the second support member 40 is indexed to the conveyor 11 side, and the first support member 30 is located at 30 in FIG.
The position is to the left as indicated by A. From this state, switching cylinder 6
When the piston rod of 8 is extended to bring the swing lever 66 to the lower position and the working fluid is supplied to the right chamber of the indexing cylinder 63, the rotating body 20 rotates counterclockwise and the stopper cam 65 abuts. The surface 65a comes into contact with the stopper 70a and returns to the first-mentioned standby position.

Next, the operation of the above embodiment will be described with reference to the operation process chart shown in FIG.

When the workpiece W supported by the support jig 19 of the workpiece mount 18 is being processed by the processing machine 15, the workpiece loading / unloading is at the standby position shown by the solid line in FIGS. 1 and 4. . When the processing of the workpiece W by the processing machine 15 is completed, the advancing / retreating drive device 24 is first activated to move both support members 30 and 40 forward. At each forward end, each gripping device 50 operates, and the first supporting member 30 grips and receives two unprocessed workpieces W stopped at a predetermined position on the conveyor 11, and the second supporting member 40
Is the processed 2 supported by the support jig 19 of the work mount 18.
After gripping and receiving the individual workpieces W, the forward / backward drive device 24
Is activated and both support members 30, 40 retract. Next, after the indexing device 60 operates to index the rotating body 20 to the loading position,
The advancing / retreating drive device 24 operates to move both support members 30, 40 forward. As a result, the unprocessed sheet 2 held by the first support member 30
The individual workpieces W are carried into the supporting jig 19, and after the supporting jig 19 supports both the workpieces W, the gripping device 50 of the first supporting member 30 releases the gripping and the supporting members 30, 40 advances and retreats, and the processing machine 15 starts processing the workpiece W supported by the support jig 19. Then, the indexing device 60 operates to index the rotating body 20 to the carry-out position, and both supporting members 30 and 40 move forward to move the second supporting member 4
After the two processed workpieces W gripped at 0 are placed on the conveyor 11, the gripping device 50 of the second support member 40 releases the grip, leaving both workpieces W on the conveyor 11 Support members 30,4
0 goes backwards. Next, the indexing device 60 is activated to turn the rotating body 20.
After indexing to the standby position, the conveyor 11 operates to send the two processed workpieces W to the next process,
The individual work pieces W are fed and stopped at a predetermined position defined by the work piece stopper 12. As described above, one cycle of loading and unloading of the workpiece is completed, and each time the processing of the workpiece W by the processing machine 15 is completed, the cycle of loading and unloading of the workpiece described above is repeated.

In the above embodiment, the first and second supporting devices 30
The forward / backward drive device 24 for moving forward and backward 40
Although one set common to 0 and 40 is provided, independent advancing / retreating drive devices are provided to the supporting devices 30 and 40, respectively, and the first supporting device 30 is activated during machining of the workpiece W to operate on the conveyor 11. The unprocessed workpiece W may be gripped.

[Brief description of drawings]

1 to 6 show an embodiment of a work loading / unloading device according to the present invention. FIG. 1 is an overall side view including a part of a processing machine, and FIG. 2 is a front view of a partially broken main part. Figure, Figure 3 is the second
III-III sectional view of FIG. 4, FIG. 4 is IV-IV sectional view of FIG. 2,
5 is a sectional view taken along line VV of FIG. 2, FIG. 6 is an operation process diagram,
FIG. 7 is a perspective view showing an outline of an example of a conventional technique. Explanation of reference numerals 11 ... Conveyor, 13 ... Outer frame, 15 ... Processing machine, 20 ... Rotating body, 30 ... First support member, 40 ... Second support member, 50 ...
… Gripping device, 60 …… Indexing device, W …… Workpiece.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsumi Kato 1-1, Asahi-cho, Kariya city, Aichi prefecture Toyota Koki Co., Ltd. (72) Inventor Hisashi Mizutani 1 Toyota-cho, Toyota-shi, Aichi Toyota Motor Co., Ltd.

Claims (1)

[Claims] 1. A workpiece carrying-in / carrying-out device for carrying in an unprocessed workpiece conveyed to a processing machine and unloading a processed workpiece from the processing machine, said workpiece being supported by said workpiece. A conveyor that conveys in parallel with the front surface of the processing machine, and a rotating body that is located above the conveyor and in front of the processing machine and that is rotatably supported by an outer frame about an axis parallel to the conveying direction of the conveyor. , The rotary body is orthogonal to the axis and
First and second support members that are provided so as to be movable in a direction with a phase difference of 90 degrees and that are driven forward and backward by a predetermined distance respectively;
A gripping device that is provided on each of the first and second support members and that detachably grips the workpiece, and an indexing device that rotates the rotating body to position it at three positions having a phase difference of 90 degrees. The work loading / unloading device, wherein the first and second supporting devices transfer the work between the conveyor and the processing machine via the gripping device.