JPH0750134Y2 - Transfer device - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an improvement of a transfer device for circulating a pallet while feeding it.

Prior art As a pallet transfer type feeder,
There is an invention of -33143. The above invention operates so that the pallet is intermittently transferred, and after the work by the worker is completed, the pallet is sent to the next work position. According to the above device, since the pallet is not positioned, it is difficult to incorporate the dedicated machine tool into the processing line. In addition, a return conveyor is installed diagonally below the transfer line, and the pallet moves in the height direction when changing pallets, and since transfer is performed at the same time before and after the transfer line, it is possible to handle higher speeds. Will be insufficient. In addition, since the interlocking relationship of each operation is complicated, it is difficult to control synchronization in the electrical field, and smooth operation cannot be expected.

Therefore, the purpose of the present invention is to mechanically synchronize the functions required for the transfer device, that is, the intermittent feeding operation of the pallet, the transfer operation of the pallet, the returning operation, etc., by one continuous rotational force. It will be realized in.

Means for Solving the Invention With the above object, the present invention continuously rotates one motor and drives a cam shaft by the rotational force of the motor,
At the same time as obtaining intermittent pallet feeding operations, all of the operation timings such as pallet positioning operation and transfer operation between pallet feed side loading / unloading position and return side loading / unloading position are mechanically controlled by multiple cams on the cam shaft. In addition to synchronizing, the pallets are circulated on the same plane so that the speed can be increased.

1 to 9 show a transfer device 1 of the present invention.
Shows the configuration of.

This transfer device 1 has a linear guide means 3, a return conveyor 4, a camshaft 5, front and rear transfer means 6, 7 and feeding means 8, 9 for linearly moving a large number of pallets 2 along a station. Is assembled by. Then, these are driven by a continuously rotating motor 10.

As shown in FIG. 1, the linear guide means 3 and the return conveyor 4 are attached to the frame 11 in a state of being arranged in parallel on the same plane. A large number of pallets 2 are housed in the guide grooves 12 of the linear guide means 3, and the front end portion of the pallet 2 is in contact with the rear end of the preceding pallet 2 and the rear end portion is in contact with the front end of the pallet 2 in the rear. It is placed in. The return conveyor 4 is, for example, a belt conveyor, and moves the pallet 2 fed from the linear guide means 3 in the return direction at a predetermined speed.

As shown in FIGS. 4 and 8, the camshaft 5 is rotatably supported by the bearing bracket 13 of the frame 11 in a state parallel to the linear guide means 3 and is decelerated via the shaft joint 14. It is connected to the output shaft of the machine 15. The speed reducer 15 receives rotation of the motor 10 by the pulley belt 16 on the input side, reduces the speed to a predetermined reduction ratio, transmits it to the camshaft 5, and rotates a plurality of program cams 17, A necessary program signal is generated by the proximity switch 18 corresponding thereto.

The cam shaft 5 has a cam 19 for positioning the pallet 2 at a position corresponding to each station of the linear guide means 3 as shown in FIGS. 4 and 8 in addition to FIG. The cam roller 20 which is provided and which is in contact with the contour thereof drives the lever 21 supported by the frame 11 and finally gives the positioning rod 22 a vertical movement. The positioning rod 22 is supported by the frame 11 so as to be vertically movable while being urged downward by a spring 23, protrudes above the linear guide means 3, and the downward positioning pin 24 is positioned in the positioning hole 25 on the pallet 2 side. The pallet 2 in the stopped state is brought into the positioning state by inserting it.

Further, the cam shaft 5, as shown in FIG. 4, FIG. 6, FIG. 8, and FIG. 9, drives the cams 26, 27 to drive the transfer means 6, 7 before and after the linear guide means 3. Is equipped with.
These cams 26 and 27 are in contact with rollers 30 and 31 of levers 28 and 29 that are rotatably supported on the frame 11, respectively. These levers 28 and 29 are swingably supported at the lower end portions with respect to the brackets 55 and 56 on the frame 11 side, and the sliders 32 and 33 at the upper end portion.
Are involved in. In addition, these sliders 32, 33
Is supported at a right angle to the feeding direction of the linear guide means 3 so as to be linearly movable with respect to the horizontal slide guides 34 and 35 on the frame 11 side, and by the pulling springs 36 and 37,
Each is biased in the backward direction. The sliders 32 and 33 hold the transfer tables 38 and 39 on their upper surfaces. These transfer tables 38 and 39 reciprocate with the center-to-center distance between the linear guide means 3 and the return conveyor 4 as a stroke, and hold one pallet 2 inside the guide grooves 40 and 41. In addition, the feeding table 38 on the front side
Has a stopper 53 at the end of the return conveyor 4 and a stopper piece 54 at the end of the guide groove 40.

Further, as shown in FIG. 4, the cam shaft 5 has a rotation-oscillation motion converting mechanism 43 such as an oscillating drive (columnar solid cam application mechanism) by a shaft joint 42 at a tip portion thereof.
Is connected to the input side of. This rotation-swing motion conversion mechanism 43 is fixed to the frame 11, converts one-direction rotation motion of the cam shaft 5 into reciprocating swing motion of the lever 44, and causes the slider 45 of the feeding means 8 on the front end side to move. introduce. The slider 45 is parallel to the feed direction of the linear guide means 3 and is held in a state capable of reciprocating linear movement with respect to a horizontal slide guide 46. As shown in FIG. 3 and FIG. The pusher 47 is held at the center position in the feeding direction of the rod 3, and is connected to one end of the connecting rod 48 at the lateral position of the linear guide means 3.

This connecting rod 48 reaches rearward as shown in FIG.
It is connected to the slider 49 of the rear feeding means 9. This slider 49, like the front slider 45,
As shown in Fig. 8 and Fig. 8, the slide guide on the frame 11 side
It is held so as to be linearly movable in the feed direction of the linear guide means 3 with respect to 50, and has an L-shaped pusher 51 on its upper surface.
And, the stopper 52 at the central position of the linear guide means 3 is held integrally therewith.

FIG. 10 shows a series of operations of the transfer device 1, that is, a feeding operation of the linear guide means 3, a positioning operation of the positioning rod 22, a necessary machining operation for the work of the pallet 2, and before and after the linear guide means 3. The sequence of the transfer operation of the pallet 2 is shown.

During the operation of the transfer device 1, the motor 10 continuously rotates to rotate the cam shaft 5 in one direction. A series of operations completes one repetition in about 1.2 seconds during which the camshaft 5 makes one rotation.

Since the slider 45 of the feeding means 8 moves forward from the left side to the right side in FIGS. 3 and 4 in the range of 0 ° to 120 ° in terms of the rotation angle of the camshaft 5, the pusher 47 is the first in the feeding direction. The rear end portion of the rear pallet 2 is moved in the feeding direction by the length of one pallet 2, that is, by one pitch.

During this time, the positioning rod 22 is in the raised position, but when the cam shaft 5 rotates from 120 ° to 150 °, the cam roller 20
Locating rod 22
Is urged downward by the spring 23 and the positioning pin 24 is fed into the positioning hole 25 of the pallet 2.
Push it inside. This allows all pallets 2
Is sent by one pitch on the linear guide means 3,
The positioning state is set. In this manner, while the pallet 2 is positioned inside the guide groove 12 of the linear guide means 3, a processing unit (not shown) or the like performs necessary processing or work on the work on the pallet 2.

On the other hand, since the cams 26 and 27 drive the corresponding levers 28 and 29 within the rotation angle range of 120 ° to 180 ° of the cam shaft 5, the slider 32 on the front end side is located at the position on the loading side of the linear guide means 3. The slider 33 on the rear end moves from A to the position D on the carry-out side of the return conveyor 4, and moves from the position B on the carry-out side of the linear guide means 3 to the position C on the carry-in side of the return conveyor 4. . That is, when all the pallets 2 are fed by one pitch on the linear guide means 3, the pallet 2 on the frontmost side gets on the transfer table 39 from the linear guide means 3 and hits the stopper 52 to stop. After that, the slider 33 moves from the position B of the linear guide means 3 to the position C of the returning conveyor 4, so that one pallet 2
Moves from the linear guide means 3 toward the return conveyor 4.

Then, while the camshaft 5 rotates from 180 ° to 300 °,
Since the slider 45 of the front feeding means 8 retracts, the slider 49 of the rear feeding means 9 is also pulled by the connecting rod 48 and moves in the backward direction. At this time, the pusher 51 on the rear end side pushes out one pallet 2 on the transfer table 39 in the return direction of the return conveyor 4 and transfers it from the transfer table 39 onto the return conveyor 4. During this time, the return conveyor 4 moves the pallet 2 from the position C to the position D and sends it onto the transfer table 38 on the carry-out side of the return conveyor 4. In this state, the pallet 2 hits the stopper piece 54 and stops at the front end portion in the traveling direction. The feeding speed of the return conveyor 4 is
It is set to be faster than the average speed of the pallet 2 on the side of the linear guide means 3.

In addition, the movement of the feeding means 9 in the backward direction causes a stopper.
52 is opposed to the tip of the pallet 2 located at the front end of the linear guide means.

Transfer table in the range of 300 ° to 360 ° of camshaft 5
38 and 39 return to their original positions. The slider 32 holds one pallet 2 on the transfer table 38 in the process of moving from the position D of the returning conveyor 4 to the position A of the linear guiding means 3, and the slider 32 holds the pallet 2 from the returning conveyor 4 to the position of the linear guiding means 3. Move to A. When the transfer table 38 is at the position A of the linear guide means 3, since the stopper 53 is located on the unloading side of the returning conveyor 4, the pallet 2 on the returning conveyor 4 hits it and stops. ing.

Further, the positioning rod 22 is moved up in the range of 330 ° to 360 ° of the cam shaft 5 so that the pallet 2 can be moved inside the linear guide means 3 in preparation for the next feeding cycle.

As is clear from the above operation, the feeding operation of the pallet 2, the positioning operation, the transfer operation of the front and rear ends, and the like are all performed in a state of being mechanically synchronized with the rotation angle of the cam shaft 5, so that a series of operations are performed in advance. Accurately proceed in the set order.

Other Embodiments of the Invention In the above embodiments, the cam mechanism is basically composed of a disk cam, but these may be composed of a positive cam having a groove or the like. Further, the returning conveyor 4 may be, for example, a roller conveyor or the like instead of the belt conveyor.

Effect of the Invention The present invention has the following unique effects.

Since all the operations are set mechanically in synchronization with the rotation of the cam shaft, the synchronized state of each of these operations is reliable, and the required operation is smoothly advanced.

In order to move a large number of pallets linearly along the station, the linear guide means and the return conveyor are arranged in parallel on the same plane, and the transfer means horizontally reciprocates between their front and rear sides. Since the pallet feed means is provided in a possible state and one pallet feed means is provided in front of and behind the linear guide means, pallet transfer and return operations can be performed at high speed without vertical movement of the pallet. You can do it.

In addition, the camshaft is driven by a continuously rotating motor,
Since the feed operation, the positioning operation, and the transfer operation can be sequentially and accurately set on the time axis, interference between these operations is eliminated and a high-speed transfer operation can be performed. Since these operations are performed in sequence by the continuous rotation of the motor, electrical timing control etc. is unnecessary, so an electrical control device etc. is not required, and the configuration for control is simplified. it can.

[Brief description of drawings]

1 is a plan view of a transfer device, FIG. 2 is a vertical sectional view of a positioning mechanism, FIG. 3 is a plan view of a front side transfer means and feeding means, and FIG. 4 is a front side transfer means and feeding means. A side view, FIG. 5 is a front view of the feeding means on the front side, FIG. 6 is a front view of the transfer means on the front side, and FIG.
FIG. 8 is a plan view of the rear transfer means and feeding means, and FIG. 8 is a side view of the rear transfer means and feeding means.
FIG. 9 is a front view of the rear transfer means, and FIG. 10 is a time chart of a series of operations. 1 ... Transfer device, 2 ... Pallet, 3 ... Linear guide means, 4 ... Return conveyor, 5 ... Cam shaft,
6,7 ... Transfer means, 8,9 ... Feeding means, 10 ...
Motor, 15 ...... Reducer, 22 …… Positioning rod, 24 ……
Positioning pins, 32, 33 …… Slider, 38,39 …… Transfer table, 43 …… Rotary / swing motion conversion mechanism, 45 ……
Slider, 47 ... Pusher, 48 ... Connecting rod, 49
…… Slider, 51 …… Pusher.

Claims (1)

[Scope of utility model registration request] 1. A linear pallet guide means for linearly moving a large number of pallets along a station and a return conveyor for returning the pallet moved by the linear guide means to the initial position are arranged in parallel on the same plane. In parallel, a large number of pallets are placed on the linear guide means in the front-back direction with respect to the pallet feeding direction, and transfer means for transferring pallets between the return conveyors is provided at both ends of the linear guide means. The transfer means located on the front side of the guide means is provided with a stopper that stops the pallet on the transfer means when the pallet is sent in the return direction, and a stopper that stops the pallet that is sent next at the end of the return conveyor. A first feed means for feeding one pallet to the rear in front of the linear guide means, and a first feed means located behind the linear guide means, A second feeding means that slides integrally with the feeding means, a stopper that prevents the forward movement of the front end pallet and stops the pallet on the transfer means, and a cam shaft that is parallel to the linear guiding means. A cam for positioning the pallet in a stopped state is provided on the cam shaft at a position corresponding to the station, and the cam shaft is driven by one continuously rotating motor.
And the second feed means, the transfer means, and the cam, and the operation timings of these are moved forward by the feed means, and the pallet that has been fed by the transfer means is moved to the return conveyor side, and the first and second feed means are moved. A transfer device characterized in that the return pallet is set to the linear guide means side in the order of movement by the retreating and transferring means.