JP2001300663A - Transport apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport apparatus capable of coping with an object to be transported of various plate thicknesses by one cam without adjustment for the object to be transported having a different plate thickness. SOLUTION: The apparatus has a clamper 16 having upper jaw/lower jaws 28, 30 for fixing, which are arranged oppositely at both sides of a transport route 26 of a play work 22 and conduct fixing/opening action for the work 22, a gripper 18 having a pair of upper jaw/lower jaws 38, 49 for transport, which conduct actions for fixing/transport/opening/return, and a lower jaw drive mechanism 20 alternately elevating respective lower jaws 30, 40 of the clamper 16/gripper 18. The lower jaw drive mechanism has a cradle 76, in which one end side is connected to an inlet side through a link 80 and the other end is supported by a coil spring 81 as freely oscillating, and a pendulum 78, in which one end side is rotatably supported to a fixed pin and the other end side is rotatably connected to the other end side of the cradle 76.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a transfer device,
In particular, the present invention relates to a gripper feed type transfer device that intermittently feeds a plate-like transferred object.

[0002]

BACKGROUND OF THE INVENTION In general,
It is known to use a transfer device, for example, a transfer device of a gripper feed system for intermittently transferring a plate-shaped work while holding the work in press working.

[0003] Such a gripper feed type transfer device has a clamper for fixing the work and a gripper for transferring the work.

Each of the clamper and the gripper is constituted by a pair of jaws, and one of the jaws of the clamper and the gripper is alternately driven using a cam so that the work is intermittently conveyed.

However, in such a transport device,
Since one of the jaws of the clamper and the gripper is driven alternately by using a cam, the movement amount of one jaw is always constant, and in order to drive the one jaw alternately, one of the clamper and the gripper is driven. Each jaw requires a cam.Furthermore, in order to properly fix and convey objects with different plate thicknesses, the distance between the jaws of the clamper and the gripper must be adjusted according to the thickness of the objects to be conveyed. There is a problem that adjustment must be made by an insertion or dial type adjustment mechanism.

An object of the present embodiment is to provide a transfer apparatus which can handle a variety of thicknesses with a single cam without adjusting the thicknesses of the thicknesses. It is in.

[0007]

In order to achieve the above-mentioned object, a transfer apparatus of the present invention faces a plate-like transfer object across a transfer path, and performs a fixing / opening operation with respect to the transfer object. A clamper for fixing the transferred object having upper and lower jaws to be carried out, and a pair of upper and lower jaws opposed to each other across the transfer path and performing a fixing, transfer, opening and return operation on the transferred object. A gripper for transporting the transferred object, and a lower jaw drive mechanism for alternately moving up and down each lower jaw of the clamper and the gripper, the lower jaw drive mechanism having one end connected to an input side via a link. A cradle, the other end of which is rotatably supported by an elastic member; a pendulum, one end of which is rotatably supported by a fixed shaft, and the other end of which is rotatably connected to the other end of the cradle. One of the cradle or pendulum is provided with a clamper abutting portion that abuts on a lower jaw of the clamper and is capable of ascending and descending, and the other is a gripper abutment that abuts on a lower jaw of the gripper and is capable of ascending and descending. A part is provided.

According to the present invention, the cradle provided in the lower jaw drive mechanism has one end connected to the input side via the link, and the other end supported by the elastic member so as to be swingable. , The clamper contact portion and the gripper contact portion can be driven alternately. In addition, the lower jaws of the clamper and the gripper are lifted by the mutual movement between the upper jaw, the transferred object, and the lower jaw. When the gap is eliminated, the gap can be absorbed by the cradle via the elastic member. As a result, even when the thickness of the conveyed object is different, it is not necessary to adjust the gap between the upper jaw and the lower jaw.

Further, by disposing one cam on the input side and transmitting the movement to the lower jaw via the cradle, it is possible to drive both the clamper and the gripper by one cam.

In the present invention, it is preferable that the cradle is pivotable by using the position of the clamper contact portion and the position of the gripper contact portion as fulcrums, and alternately switching these fulcrum positions.

With such a structure, the clamper and the gripper can be driven alternately by alternately switching the position of the clamper abutting portion and the position of the gripper abutting portion to serve as a fulcrum.

In the present invention, the gripper includes a grip base fixed to a feed rod that reciprocates in synchronization with the input side, an upper jaw fixed to the grip base, and a grip base. It has a lower jaw that can be raised and lowered, and a grip lever with a rolling table that rotatably supports the lower jaw, and the gripper contact portion can move up and down the lower jaw via the grip lever It is good to

With such a configuration, the grip base reciprocates in synchronization with the input side of the lower jaw drive mechanism, thereby causing the upper jaw and the lower jaw provided on the grip base to reciprocate and the gripper to move. By raising and lowering the lower jaw via the grip lever by the contact portion, the transported object can be transported reliably.

In the present invention, a release mechanism for lowering the cradle and lowering the lower jaws of the clamper and the gripper may be provided at the other end of the cradle supported by the elastic member.

[0015] With this configuration, the jaws of the clamper and the gripper are lowered by the release mechanism, and the conveyed object can be opened.

Therefore, it is possible to reliably position the transported object with the positioning pins or the like while the transported object is open.

In the present invention, a cam which is rotated in synchronization with a crankshaft of a press machine is preferably provided on an input side of the lower jaw driving mechanism.

With such a configuration, the lower jaw drive mechanism can be driven by one cam rotated in synchronization with the crankshaft of the press machine, and the clamper and the gripper can be driven in synchronization with the press working. A press machine that can be driven can be provided.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 5 are views showing a press using a transfer device according to an embodiment of the present invention.

As shown in FIG. 1, the press 10
Press working is performed by rotational driving of the crankshaft 12, and the transfer device 14 shown in FIG. 2 can be driven in synchronization with the crankshaft 12.

The transfer device 14 intermittently conveys a plate-like work 22 as an object to be conveyed and makes it possible to sequentially press the work 22. The clamper 16 for fixing the work, and the work transfer , A lower jaw drive mechanism 20, and a release mechanism 24.

The clamper 16 is used to transport the work 22
It has an upper fixing jaw 28 and a lower fixing jaw 30 that face each other across the 6.

The fixing upper jaw 28 is fixed above the transport path 26, and the fixing lower jaw 3
0 is a jaw base pin 34 by the jaw base 32.
It is supported to be rotatable around.

The jaw base 32 can be moved up and down by the lower jaw drive mechanism 20, and the upper jaw 28 for fixing and the work 22
The work 22 is fixed by the clamper 16 in a state in which no gap is formed between the work 22 and the lower jaw 30 for fixing.
By lowering the jaw base 32, the fixing lower jaw 30
Is lowered to release the work 22 in a state where the work 22 is separated from the work 22.

The gripper 18 is for intermittently transporting the work 22 by a predetermined distance, and has a grip base 36.
, Upper jaw 38 for transport, and lower jaw 40 for transport
And a grip lever 42.

The grip base 36 is fixed to a feed rod 44 which reciprocates in synchronization with the crankshaft 12.

As shown in FIGS. 3 and 4, a link 46 is connected to one end of the feed rod 44.
6 is connected to a lever 48 held by a shaft 47 by a pin 5.
The pin 50 is connected to a slider 54 which is slidable in a rotatable slide case 52.

The slide case 52 is connected to a link 58 via a pin 56 on the lower end side.
Are connected to the eccentric shaft 60.

The eccentric shaft 60 is connected at its upper end to a transmission shaft 64 connected to the crankshaft 12 via a gear group 62 at its lower end via bevel gears 66 and 68 at its lower end.

Accordingly, when the press working is started, the crankshaft 12 rotates, and the rotation is transmitted to the transmission shaft 64 via the gear group 62, and the transmission shaft 64 rotates synchronously with the crankshaft 12, and the rotation thereof is performed. Is transmitted to the eccentric shaft 60 via the bevel gears 66 and 68.

The rotation of the eccentric shaft 60 is transmitted to the slider case 52 via the link 58 and the pin 56, and the slider case 52 performs a swinging motion.

The slider 54 whose movement is restricted by the lever 48 moves in the slide case 52 and
Then, the feed rod 44 is moved forward and backward through the link 46.

Therefore, the grip base 36 fixed to the feed rod 44 also moves forward and backward in synchronization with the pressing.

The upper conveying jaw 38 and the lower conveying jaw 40 are disposed on the grip base 36 so as to face each other with the conveying path 26 interposed therebetween.

The upper conveying jaw 38 is fixed to the grip base 36, and the lower conveying jaw 40 is movable up and down with respect to the grip base 36.

That is, the lower jaw 40 for transportation is moved up and down with respect to the grip base 36.
0 and the roller 72 is attached to the lower surface of the jaw base 70.

The grip lever 42 is vertically movable about a shaft (not shown) at the distal end, and the rolling table 7 on which the roller 72 of the jaw base 70 is placed is mounted on the distal end.
4 are provided.

Accordingly, when the grip base 36 reciprocates with the reciprocation of the feed rod 44, the jaw base 70 reciprocates while rolling on the rolling table 74 via the rollers 72. Become.

Then, the grip lever 42 is raised by the lower jaw drive mechanism 20, and the jaw base 70 and the lower jaw 40 for conveyance are raised accordingly, so that the upper jaw 38 for conveyance, the work 22 and the lower jaw 40 for conveyance are raised. The work 22 is clamped in a state where the gap is eliminated, and is fixed and transported.

When the grip lever 42 is lowered, the jaw base 70 and the lower conveying jaw 40 are lowered, and the opening and returning operation of the work 22 is performed with the lower conveying jaw 40 separated from the work 22. Is being done.

The lower jaw drive mechanism 20 includes a cradle 7
6 and a bendurum 78.

The cradle 76 has one end connected to the input side via a link 80 and the other end supported by a coil spring 81 as an elastic member so as to be swingable.

More specifically, the link 80 has an upper end connected to one end of the cradle 76 and the other end connected to a lever 84 fixed to the shaft 82.

The shaft 82 is in contact with a cam 88 fixed to the outer periphery of the eccentric shaft 60 via a lever 86.

Therefore, when the eccentric shaft 60 rotates in synchronization with the crankshaft 12, the cam 8 rotates with the rotation.
8 rotates, and a lever 86 performs an oscillating motion along the contour thereof, and the oscillating motion is transmitted through the shaft 82 to the lever 84.
To cradle 76 via link 80
It is transmitted to.

The coil spring 81 includes a cradle 76
Is provided so as to urge the other end side upward.

The pendulum 78 has a fixed shaft 90 at one end.
And the other end is rotatably connected to the other end of the cradle 76 via a movable pin 92.

Then, the clamper 1 of the pendulum 78
At a position corresponding to the jaw base 32 on the sixth side, a clamper abutting portion 94 abutting on the lower surface of the jaw base 32 is provided.
A gripper contact portion 96 that contacts the lower surface of the distal end of the grip lever 42 is provided at a position corresponding to the above.

The cradle 76 is pivotable with the position of the clamper abutting portion 94 and the position of the gripper abutting portion 96 as fulcrums, and alternately switching these fulcrum positions.

The swinging motion of the cradle 76 will be described.

First, when the tip of the lever 84 rises through the shaft 82, the cradle 76
Moves upward.

Next, the gripper contact portion 96 provided on the cradle 76 contacts the lower surface of the tip of the grip lever 42, the tip of the grip lever 42 rises, and the jaw base 70 and the lower jaw 4
0 rises.

When the work 22 exists on the feed table 27, the operation of the lower jaw 40 for transfer is such that the lower jaw 40 for transfer and the upper jaw 38 for transfer
Stop with the.

When the cradle 76 rises in this state, the cradle 76 rotates around the contact portion with the grip lever 42.

Then, the pendulum 78 connected to the cradle 76 descends around the fixing pin 90 against the urging force of the coil spring 81.

At this time, the jaw base 32 is lowered about the base pin 34 by the movement of the pendulum 78.

At this time, the mutual interval between the upper fixing jaw 28 and the lower fixing jaw 30 increases.

Next, the end of the lever 84 has been lifted,
When the descent is started, the cradle 76 is lowered via the link 80 around the contact portion with the grip lever 42.

As the descent proceeds, the pendulum 78 rotates about the jaw base pin 34.

Then, the distance between the upper fixing jaw 28 and the lower fixing jaw 30 becomes narrower, and the work 22 is finally sandwiched.

When the cradle 76 is lowered in this state, the cradle 76 swings around the contact portion with the 32, that is, the position of the clamper abutting portion 94. The distance between the jaws 40 is widened against the urging force of the coil spring 81.

As described above, the movement of the cradle 76 is based on the rotational movement centered on the contact portion between the grip lever 42 and the gripper abutting portion 96, and when the jaw base 32 is centered on the contact portion between the jaw base 32 and the clamper abutting portion 94. By alternately repeating the case of the rotating motion, the fulcrum position is switched alternately, and the lower jaw 28 for fixing and the lower jaw 3
8 alternately goes up and down alternately.

The release mechanism 24 has an L-shaped release lever 100 rotatable by a release pin 98 attached to the end of the cradle 76 supported by the coil spring 81. The release lever 100 is biased at one end by a release spring 102, and a screw adjustment rod 104 with a dial is attached to the other end.

Then, by rotating the screw adjusting rod 104, one end of the release lever 100 is pressed onto the cradle 76, and the cradle 76 is lowered against the urging force of the coil spring 81, whereby the clamper contact portion The lower jaw 94 and the gripper contact portion 96 are lowered to lower the lower jaw 30 for fixing and the lower jaw 40 for conveyance to the work 2.
2 can be set apart.

As a result, the work 22 is released, and in this state, the work 22 can be positioned by a positioning pin or the like.

Next, the operation of transporting the work 22 using the clamper 16 and the gripper 18 will be described with reference to FIG.

First, the screw adjusting rod 104 of the release mechanism 24 is adjusted, the cradle 76 is lowered by the release lever 100, and the lower jaw 30 for fixing the clamper 16 and the gripper 18 and the transfer are carried out as shown in FIG. The work lower jaw 40 is lowered to release the work 22 from the work 22, and the work 22 is positioned using a positioning pin or the like in this state.

Next, from the state shown in FIG. 5A, the release mechanism 24 is released, and the crankshaft 12 of the press machine 10 is rotated to start press working.

Then, the eccentric shaft 60 rotates synchronously with the crankshaft 12 from the crankshaft 12 via the transmission shaft 64.

When the eccentric shaft 60 rotates, the feed rod 44 reciprocates with the rotation, and the grip base 36 repeatedly moves forward and backward.

At the same time, the cradle 76 makes a swinging motion by the cam 88.

In this state, as shown in FIG. 5B, the lower jaw drive mechanism 20 first drives the lower jaw 40 for transport of the gripper 18 so as to clamp the work 22 and move the clamper 16. The fixing lower jaw 30 opens the work 22.

Next, in this state, the grip base 36 of the gripper 18 moves by a predetermined distance, and as shown in FIG.
0 moves to carry the work 22 by a predetermined distance.

Next, from this state, the lower jaw 40 for conveyance of the gripper 18 is lowered to open the work 22.

At this time, the clamper 16 releases the work 22 by the gripper 18 in a state where the lower jaw 30 for fixing is raised to clamp the work 22 and fix the work 22.

Next, the work 22 is moved by the clamper 16.
When the grip base 36 is fixed in the state shown in FIG.
A return operation is performed as shown in FIG.

Next, as shown in FIG. 5 (6), the gripper 18 raises the lower conveying jaw 40 at the return position to clamp the work 22.

At this time, the clamper 16 holds the work 22 until the gripper 18 holds the work 22.

Then, from this state, the clamper 16 releases the work 22 as shown in FIG. 5B, and the next work 22 is conveyed.

Thereafter, the transfer of the work 22 shown in FIG. 5 (3), the release of the work 22 shown in FIG. 5 (4), and the return operation of the transfer upper jaw 38 and the transfer lower jaw 40 shown in FIG. 5 (5). , Work 2 by gripper shown in FIG.
2 are interposed and fixed, and the work 22 is intermittently transported by sequentially repeating the operations of FIGS.

In this case, even when the plate thickness of the work 22 changes, the swing operation of the cradle 76 can reliably cope with the change in the plate thickness.

The present invention is not limited to the above embodiment, but can be modified in various forms within the scope of the present invention.

For example, in one embodiment, the clamper contact portion is provided on the Henduram and the gripper contact portion on the cradle, but the positions of the clamper contact portion and the gripper contact portion are reversed by reversing the positions of the clamper and the gripper. Can be reversed.

Further, in the above-described embodiment, the case where the transfer device of the present invention is used for a press machine has been described. However, the present invention is not limited to this example, and various plate-like works such as electronic parts can be used. It can be widely applied when transporting.

[Brief description of the drawings]

FIG. 1 is a front view showing a press using a transfer device of the present invention.

FIG. 2 is an internal detailed view showing a transfer device used in the press of FIG. 1;

FIG. 3 is a detailed view showing a transmission structure from the crankshaft of FIG. 1 to the feed rod of FIG. 2;

FIG. 4 is a detailed view showing a transmission mechanism from the eccentric shaft of FIG. 3 to a feed rod and a cradle.

FIGS. 5 (1) to (6) are explanatory diagrams showing operating states of a clamper and a gripper, respectively.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 press machine 12 crankshaft 14 transfer device 16 clamper 18 gripper 20 lower jaw drive mechanism 22 work 24 release mechanism 26 transfer path 28 fixing upper jaw 30 fixing lower jaw 36 grip base 38 transfer upper jaw 40 transfer lower jaw 42 Grip lever 44 Feed rod 76 Cradle 78 Pendulum 80 Link 81 Coil spring 88 Cam 94 Clamp contact part 96 Gripper contact part

Claims (5)

[Claims] 1. A clamper for fixing a transferred object having upper and lower jaws that oppose each other across a transfer path of a plate-shaped transferred object and perform fixing and opening operations on the transferred object; A gripper for transporting a transferred object having a pair of upper and lower jaws opposed to each other across a road and performing a fixing / transporting / opening / returning operation on the transferred object; and lower jaws of the clamper and the gripper. And a lower jaw drive mechanism that alternately lifts and lowers the lower jaw drive mechanism, wherein the lower jaw drive mechanism is connected to the input side via a link, and the other end side is supported by an elastic member and can be rocked. A pendulum having one end rotatably supported on a fixed shaft and the other end rotatably connected to the other end of the cradle; and one of the cradle or the pendulum, Contact with the lower jaw of Ranpa those provided clamper contact portion which allows the lifting, transporting and wherein in that a gripper abutment portion to enable lifting the lower jaw and the contact with the gripper to the other. 2. The cradle according to claim 1, wherein the cradle has a clamper contact portion position and a gripper contact portion position as a fulcrum, and these fulcrum positions are alternately switched so as to be swingable. Transport device. 3. The gripper according to claim 1, wherein the gripper is fixed to a feed rod that reciprocates in synchronization with the input side, an upper jaw fixed to the grip base, and the grip. A lower jaw that can be raised and lowered with respect to a base; and a grip lever with a rolling table that rotatably supports the lower jaw. The gripper abutting portion includes the lower jaw via the grip lever. A transfer device characterized in that a jaw can be moved up and down. 4. The cradle according to claim 1, wherein the cradle is supported by the elastic member.
A transport device comprising a release mechanism for lowering the lower jaws of the clamper and the gripper by lowering the cradle. 5. The conveyance according to claim 1, wherein a cam that is rotated in synchronization with a crankshaft of a press machine is provided on an input side of the lower jaw drive mechanism. apparatus.