JP2659695B2 - Work reversal transfer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work reversing / transporting apparatus suitably used for transferring a work by reversing the work by 90 degrees on a work conveying line such as a sheet bundle block.

[0002]

2. Description of the Related Art When transferring a work by turning it 90 degrees,
Conventionally, a clamp arm is provided so as to be reciprocally rotatable between a horizontal position and a vertical position, and is horizontally rotated (first station).
To clamp the work, and release the clamp at the horizontal rotation position (second station).

[0003]

In the above-mentioned prior art, after the clamping means releases the work clamp at the second station, it must be double-acted to the first station in order to clamp the next work. The structure is such that only one reversing operation can be performed in one round trip, which is extremely inefficient.

Further, a complicated drive function for reciprocating the clamp means between the first and second stations and switching between them is required.

[0005]

On the other hand, according to the present invention, there is provided a rotating wheel mounted intermittently rotatable and having a plurality of rotating wheels integrally disposed on the peripheral side surface of the rotating wheel at equal intervals in the circumferential direction. A work carrying means for carrying a work into the gripper and clamping the work to the gripper at a first station at a side dead center of the wheel where the rotating wheel stops, and
A work reversing / transporting device including a work unloading unit that unloads the work from the gripper at a second station at a bottom dead center of the rotating wheel where the rotating wheel stops. In the work reversing transfer device, the upper gripping nail and the lower gripping nail constituting the gripper are arranged so as to face each other in the rotation direction of the rotating wheel, and both gripping claws extend outward to extend the outward work. It is arranged to form an entrance and exit. The lower jaw pawl is rotated in the opposite direction to the rotating wheel to clamp the work between the upper jaw nail and the closed position, and the upper jaw jaw is opened in the rotating direction of the rotating wheel to release the clamp. It can be opened and closed at the position. The lower jaw claw forms the closed position in the first station and is placed at substantially the same level as the work carrying level, and the work is formed between the lower jaw claw and the upper jaw claw in the closed position by the work carrying means. It is pushed between the upper and lower gripping claws through the work inlet / outlet opening laterally. Further, the lower jaw pawl expands the work inlet / outlet opening downward at the second station in the rotation direction of the rotating wheel to form the open position, and the work is moved by the work unloading means to the lower jaw jaw. It is carried out in the expanding direction. Further, a lifter capable of moving up and down is provided opposite to the work entrance and exit opening downward in the second station, and the lifter is used as a work guide table for forming the work unloading means before the gripper releases the clamp of the work. The lifter supports the work, which has been released from the clamp by the gripper, and supports the work. Then, the lifter descends through the work guide and transfers the work onto the work guide. The work is carried out in the expanding direction of the lower grip.

[0006]

According to the present invention, the work is pushed into the gripper at the first station (side dead center) and clamped in the first station (side dead center) while the rotating wheel is intermittently rotated in one direction.
The release of the clamp by the gripper and the unloading of the work at the station (bottom dead center) can be properly performed by the arrangement of the upper and lower jaws and the opening and closing of the lower jaw. In addition, in the first station, it is possible to appropriately exert the clamping action while receiving the work by the lower gripping claw which is rotated in the direction opposite to the rotation direction of the rotating wheel and is at the same level as the work carry-in level,
The lower bit in the second station is expanded in the rotating direction of the rotating wheel, so that the work can be properly transferred to the lifter by the gravity of the work and carried out in the lower bit expanding direction. Therefore, the transfer of the work from the side dead center to the bottom dead center by using the gripper provided on the side surface of the rotating wheel and the 90-degree inversion can be appropriately performed. In the second station, a lifter provided opposite to the work entrance opening downwardly properly receives a work to be dropped from the gripper by a lifter ascending through a guide table for carrying out the work, and then lifts the lifter. By lowering through the work guide table, it can be properly supported on the work guide table and carried out.

[0007] Since the above operation is repeated substantially continuously,
Significantly improves reversal work efficiency. According to the present invention, the desired work 90-degree reversal purpose can be achieved with a simple drive mechanism that intermittently rotates the rotating wheel in one direction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a rotating wheel mounted so as to be intermittently rotatable about a shaft 2;
A plurality of grippers 3 are arranged at equal intervals on the circular locus of.

In other words, a plurality of grippers 3 are arranged at equal intervals in the circumferential direction integrally with the rotating wheel 1 along the peripheral side surface so as to be concentric with the rotating wheel.

As described above, each gripper 3 intermittently revolves on the rotating circular locus of the rotating wheel 1 with the intermittent rotation of the rotating wheel 1 to clamp the work W at the first station S ₁ on this circular locus. a rotational traveling direction of the second station S ₂ to unclamp the workpiece W.

In FIG. 1, a first station S _{1 is located at} the top dead center of the rotating wheel 1 at the side dead center that has advanced in the rotation direction.
And has a second station S ₂ to respectively installed in the bottom dead center. Right dead center when the rotational wheel 1 is clockwise, the left dead center is respectively first station S ₁ in the case of the same counter-clockwise.

On the other hand, in the first station S ₁ ,
It has a work carry-in means 4 for supplying the work W to the gripper 3 and a work carry-out means 5 for carrying out the work W released from the gripper 3 in the second station.

The work carrying means 4 is formed by a work guide table 6 extending horizontally toward the first station S ₁ and an endless revolving body 7 such as an endless transfer chain moving along the guide table 6. .

[0014] endless rotary Hashikarada 7 is provided with a work feeding pusher 8 which arranged spaced, the first station inlet and outlet immediately before the S ₁ while pressing the supported workpiece W into the guide pedestal 6 top, i.e. inlet of the gripper 3 The workpiece is sent out immediately before the exit, and the workpiece is pushed into the gripper 3 by the workpiece insertion pusher 9.

The insertion pusher 9 is rotatably mounted on the shaft 10 between a standby position where it falls down to a work loading level shown by a virtual line in the figure and a work pushing position which rises above the work loading level shown by a solid line in the figure. Support.

The work loading pusher 9 is rotated in timing from the standby position to the pushing position, pushes the rear surface of the work W sent out by the work loading means 4 and pushes it into the gripper 3, and after this pushing, again. It falls down to the standby position and prepares for the next work insertion. The gripper 3 while receiving the workpiece pushing, stopped in the first station S _1.

The gripper 3 includes an upper gripping claw 11 and a lower gripping claw 1 which are arranged to face each other in the rotation direction of the rotary wheel 1.
The two grippers 11 and 12 are rotatably supported on the side surfaces of the rotating wheel 1 by shafts 13 and 14 so as to be rotatable in the rotating direction of the rotating wheel 1 and in the opposite direction. The grippers 3 are arranged so as to extend outwardly facing each other to form an outwardly oriented work entrance and exit, and the work entrance and exit of the gripper 3 are opened and closed in a timing manner with the shafts 13 and 14 as fulcrums.

FIG. 1 shows that the gripper 3 stopped at the first station S ₁ closes the upper and lower holding claws 11, 12, and firmly holds the work W which has been pushed in through the work inlet / outlet opening laterally. The state is shown. That is, the lower holding claw 12 is rotated in the opposite direction to the rotating wheel 1 in the first station and is placed in the closed position, and the work is forced by the work inlet / outlet formed between the upper and lower holding claws 11 and 12. And clamp it down.

In FIG. 1, the upper bite 11 is a bite that follows in the rotation direction of the wheel 1.
“4” means the biting nail of the preceding.

The upper jaw 11 of the gripper 3 has an upper presser 15 on its inner surface for elastically pressing the upper surface of the work W. The upper retainer 15 extends along the inner surface of the upper retainer claw 11, and pivotally supports the outer end of the upper retainer claw 11 to the outer end of the upper retainer claw 11 via a shaft 16. The side is held by a spring 17 in the middle of the upper holding claw 11. The upper presser 15 absorbs the variation in the height of the work W as described above, and
7, the work W is pressed against the lower grip 12 and the clamp is strengthened.

The lower bite 12 has a regulating portion 18 at its inner part, that is, at the inner end, for regulating the front surface of the work W. The regulating part 18 limits the amount of work inserted by the insertion pusher 9. .

As described above, the gripper 3 moves the work W to the first position.
After firmly clamping at station S _1,
Rotating wheel 1 resumes the rotation, this transfer is toward the companion no gripper 3 and the workpiece W to rotate (revolve) the second station S _2.

An arc-shaped fall prevention guide 19 is provided between the _first and second stations S ₁ and S ₂ along the outer periphery (transfer locus) of the work W. The fall prevention guide 19 is arranged close to the outer end surface (the rear surface) of the work W with a slight gap therebetween, and when the work W is displaced from the gripper 3 during the transfer of the work W, the guide is received to prevent the fall. .

Thus, when the gripper 3 and the work W reach the bottom dead center (the second station S ₂ ), the rotation of the rotating wheel 1 is stopped, and the gripper 3 and the work W are stopped at the second station S ₂ . I do. At this time, the claws 11,
Twelve workpiece inlets and outlets open downward. Gripper 3
By rotating the lower Kuwae claws 12 after reaching the second station S ₂ in the rotational direction of the rotary wheel 1 and spreading the workpiece inlet and outlet, to release the clamping of the workpiece W. Work W
Is turned 90 degrees by being transferred from the first station S ₁ to the second station S ₂ , and is pushed out of the gripper 3 by the work discharge means 5,
Supply to the next process.

The work unloading means 5 includes a work guide table 20 extending horizontally from the entrance / exit of the second station S ₂ (the entrance / exit of the gripper 3), and an endless chain running along the work guide table 20. The endless running body 21 is provided with feed pushers 22 arranged at regular intervals, and the feed pusher 22 is shifted with the operation of the endless running body 21, and by this shift, the gripper 3 is moved. The work W is released from the rear surface, and is pushed out of the gripper 3 and carried out along the guide table 20 to the front.

[0026] can be directed above while the workpiece extruded from the gripper within 3 is in progress, to the first station S ₁ rotates the gripper 3 the emptied to resume the rotation of the rotary wheel 1.

The lower grip 12 is connected to the first station S _1.
Before reaching the position, the rotary wheel is rotated and closed in the direction opposite to the rotation direction of the rotating wheel, and is stopped at the first station S _{1 at a} level substantially equal to the work loading level, and the work is moved to the lower jaw 12. The guide is pushed between the upper and lower gripping claws 11 and 12 with a force by the work carrying means.

As an example, the upper bite 11 is fixed,
Only the lower holding claw 12 can be provided so as to be openable and closable. In this case, the workpiece W is work-inserting is carried out while pushing up against the upper retainer 15 to the elastic force of the spring 17 by-inserting pusher 9 in the first station S _1.

In another example, upper and lower claws 11, 12
Are openably and closably provided, for example, in the first station S ₁ , the upper and lower gripping claws 11, 12 are closed to receive and clamp the work W, and in the second station S ₂ , the lower gripping nail 12 is rotated by the rotating wheel 1. And the entrance / exit is expanded.

[0030] The the second station S ₂ provided lifter 23 with inlet and outlet facing the gripper 3. The lifter 23 is, as shown by a virtual line in the figure, a work guide table 20.
Through vertically movably provided on the lower and upper grippers 3 rises to the upper through guide table 20 before releasing the clamp of the workpiece W at the second station S _2, the workpiece W is released from the gripper 3 Take it. The lifter 23 supports the work W on the upper side of the guide table 20 and then descends downward through the work guide table 20, and transfers the work W to the guide table 20 during this lowering process.
Since the work W is transported along a circular orbit, if the work W is directly transferred from the gripper 3 to the guide table 20, the corner of the work W abuts on the surface of the guide table 20 to damage the work W,
Feeding is stopped in the abutted state, and delivery becomes impossible.

In order to circumvent this, the guide table 20 is arranged at a distance below the work W, and the lifter 23 which moves up and down through the guide table 20 receives the work W to be dropped from the gripper 3 by gravity. It is to be delivered to the information board 20.

[0032] In Matazu 1 is stopped in the middle of the transport path across the gripper 3 between the first station S ₁ and the second station S _2, the following to the first station S gripper 3 reaching ₁ when the workpiece W To clamp the
The reverse transfer efficiency has been improved.

[0033]

According to the present invention, the work is carried into the gripper at the first station (side dead center) and clamped during the intermittent rotation of the rotating wheel, and
The release of the clamp and the unloading of the work by the gripper at the station (bottom dead center) can be properly performed by the arrangement of the upper and lower gripping claws, the opening and closing of the lower gripping nails, and the cooperation of the lifter.

Also, in the first station, the work of clamping the work while receiving the work by the lower biting claw which is rotated in the direction opposite to the rotation direction of the rotating wheel and becomes the same level as the work carry-in level can be properly exerted. At the same time, the lower jaw pawl in the second station is expanded in the rotation direction of the rotating wheel, so that the work can be properly transferred to the lifter by the gravity of the work and carried out in the lower jaw pawl expanding direction.
Therefore, the transfer of the work from the side dead center to the bottom dead center and the 90-degree reversal can be appropriately performed by using the gripper provided on the side surface of the rotating wheel.

In the second station, a lifter provided opposite to the work entrance opening downwardly properly receives a work to be dropped from the gripper by a lifter which rises through a guide table for carrying out the work. By lowering the lifter through the work guide, the lifter can be properly supported on the work guide and carried out.

[Brief description of the drawings]

FIG. 1 is a side view of a work reversing and transferring apparatus according to an embodiment of the present invention.

[Explanation of symbols]

S ₁ First station S ₂ Second station 1 Rotating wheel 3 Gripper 4 Work loading means 5 Work unloading means 9 Work loading pusher 11 Upper jaw claw 12 Lower jaw claw 15 Upper press 17 Spring 18 Restrictor 19 Work fall prevention guide 23 Lifter

Claims (1)

(57) [Claims] A plurality of grippers, which rotate integrally with the rotating wheel, are arranged at equal intervals in a circumferential direction on a peripheral side surface of the rotating wheel mounted so as to be intermittently rotatable. At a first station at a side dead center of the workpiece, a workpiece loading means for loading a workpiece into the gripper and clamping the workpiece to the gripper, and when the rotating wheel is stopped, the workpiece is loaded at a second station at a bottom dead center of the wheel. In a work reversing transfer device provided with a work unloading means for unloading from a gripper, an upper biting claw and a lower biting claw constituting the gripper are arranged so as to face each other in a rotation direction of a rotating wheel, and both biting claws are directed outward. And extend downward to form an outwardly facing work inlet / outlet. The upper position is opened and closed between the closed position where the work is rotated in the opposite direction to clamp the work with the upper bite and the open position where the upper bite is expanded in the rotation direction of the rotating wheel to release the clamp. The lower jaw claw forms the closed position in the first station and is placed at substantially the same level as the work carry-in level, and the work is formed between the lower jaw claw and the upper jaw claw in the closed position by the work carry-in means. The work inlet / outlet opening sideways is pushed through between the upper holding nail and the lower holding nail, and the lower holding nail expands the work inlet / outlet opening downward in the second station in the rotation direction of the rotating wheel. Open to form the open position, the work is carried out by the work take-out means in a direction in which the lower bite extends, and further, the work is opened downward at the second station. A lifter capable of moving up and down is provided facing the entrance and exit, and the lifter is moved up through the work guide table forming the work unloading means to a position above the guide table before the gripper releases the clamp of the work, and is lifted by the gripper. The lifter supports the unclamped work, and after supporting the work, the lifter descends through the work guide table and transfers the work onto the work guide table to carry out the work in the expanding direction of the lower biting claw. A work reversal transfer device characterized in that it is configured to perform the work reversal.