JP2576809Y2 - Push-pull device for moving workpieces and tools - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-pull device for driving a work or a tool for pushing and pulling a work or a tool, and is particularly suitable for moving and driving an upper die of a press machine. About things.

[0002]

2. Description of the Related Art Conventionally, in a press machine, at the time of mold exchange, push-pull driving of a mold is performed across a mold carrier and the press machine, and a clamp for fixing the mold is fixed. It is necessary to release the clamp and retreat it to the side, and after replacing the mold, it is necessary to switch the clamp again to the mold fixing position. A push-pull device suitable for exchanging the dies between the carriage and the press machine by driving the dies of the press machine by push-pull is disclosed in JP-B-55-48535.

In this push-pull device, one end of a chain member with a roller is connected to a carriage with a hook, and the chain member with a roller is provided on a mold conveying cart and an intermediate rail between the cart and a press machine. A drive device is provided along the T-shaped guide groove of the member, and a drive device capable of driving the sprocket engaged with the roller chain member in a forward and reverse direction is provided at a side end of the carriage. 2. Description of the Related Art A push-pull device has been put to practical use, in which a die is configured to be driven by a push-pull drive over a bogie and a bolster of a press machine by driving a chain member with a push-pull drive. . The drive sprocket is arranged to turn the roller chain member extending from the carriage downward by 90 degrees.
Below the sprocket, a chain accommodating portion for accommodating a chain member with rollers is provided.

On the other hand, as a push-pull device for pushing and pulling a clamp for fixing an upper die of a press machine, Japanese Patent Publication No. 63-25899 discloses a link plate of a chain with rollers using a link plate having a U-shaped cross section. One end of a single-folded chain member with a roller that can be bent only on one side is formed and connected to a clamp, and the single-chain chain member with a roller is disposed along a T-shaped guide groove of a press slide,
A guide mechanism is provided at a side end of the press slide to change the direction of the one-fold roller chain member by 90 degrees upward,
A sprocket that engages with the roller-folded chain member above the guide mechanism and changes the direction 180 degrees downward;
A push-pull device is described in which a hydraulic cylinder is provided for raising and lowering the sprocket while engaging the sprocket with a one-piece chain member with rollers, and the other end of the one-piece chain member with rollers extending downward from the sprocket is fixed. ing.

[0005]

[Problem to be solved by the invention] Japanese Patent Publication No. 55-4853
The push-pull device described in Japanese Patent Publication No. 5 is applied to a push-pull drive of an upper die or the like because the chain member with the roller is hung downward from the sprocket and housed in the chain housing portion. It is difficult. On the other hand, in the push-pull device using a one-folded chain member with a roller disclosed in Japanese Patent Publication No. 63-25899, the push-pull stroke for pushing and pulling the upper mold fixing clamp is the stroke of the hydraulic cylinder. About 2
Therefore, when the push-pull stroke is increased, the stroke of the hydraulic cylinder is increased, and the overall height of the push-pull device is increased.
An object of the present invention is to provide a push / pull device for driving a workpiece or a tool that can be reduced in size and that can increase a push / pull stroke. It is to provide a pull device.

[0006]

According to a first aspect of the present invention, there is provided a push / pull apparatus for moving a workpiece or a tool, which pushes / pulls a chain member with a roller having one end connected to a driven object which is a workpiece or a tool. A push-pull device that pushes / pulls a driven object by means of a push-pull device, wherein one end of the chain member is connected to the driven object and the other end is a free end, and a roller member extending horizontally from the driven object. A first sprocket that engages with a chain member and changes direction upward by 90 degrees; and a first sprocket that is disposed above the first sprocket and engages with a chain member with a roller extending from the first sprocket and downwardly rotates by 180 degrees. The second to convert
A sprocket, a chain receiving portion formed between the first sprocket and the second sprocket, and receiving a chain member with a roller extending downward from the second sprocket;
And a driving unit capable of driving at least the first sprocket in forward and reverse rotations.

[0007]

In the push-pull device for driving the movement of a workpiece or a tool according to the present invention, at least the first sprocket is driven to rotate by the driving means in a direction in which the chain member with the roller is advanced. The roller chain member engaged with the second sprocket is pushed in the advance direction, and the driven object connected to one end of the roller chain member is pushed,
At this time, the roller-equipped chain member is sequentially pulled out of the chain accommodating portion. When the first sprocket is driven in the opposite direction, the chain member with the roller is pulled in the retreating direction, and the chain member with the roller passing through the second sprocket is moved into the chain receiving portion between the first sprocket and the second sprocket. Will be sequentially accommodated.

As described above, the roller-equipped chain member extending from the object to be driven is turned upward by 90 degrees by the first sprocket, and the roller-equipped chain member extending from the first sprocket is elevated above the first sprocket. Since the second sprocket located at the position (1) converts the direction downward by 180 degrees, it is a device suitable for push-pull driving of an object to be driven such as an upper die of a press machine. Since the chain member with the roller extending downward from the second sprocket is accommodated in the chain accommodating portion between the first and second sprockets, the chain member with the long roller can be accommodated in the small chain accommodating portion. The stroke of the push-pull drive can be increased without increasing the size, and the chain accommodating portion is formed by effectively utilizing the dead space between the first and second sprockets, thereby further reducing the size of the device. be able to.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is an example of a case where the present invention is applied to a clamp push-pull device for pushing and pulling a clamp for fixing an upper die of a press machine. FIG.
As shown in the figure, the lower mold 3 disposed on the bolster 2 of the press machine 1 is fixed by two pairs of right and left clamps 4,
The upper die 6 disposed on the lower surface of the slide 5 is fixed by two pairs of right and left clamps 7. When the upper and lower dies 6 and 3 are replaced, the clamp 4 for the lower dies 3 is laterally moved by the push-pull device 10 in a state where the slide 5 is lowered and the upper and lower dies 6 and 3 are stacked. And the clamp 7 for the upper die 6 is retracted to the side by the push-pull device 20. In this manner, in a state where the upper and lower molds 6 and 3 are unlocked,
When the upper and lower dies 6 and 3 are exchanged, the clamp 4 is moved to a fixed position by the push-pull device 10 to fix the lower mold 3, and the push-pull device 20 clamps the clamp 7. Is moved to the fixing position to fix the upper mold 6.

Next, a push-pull device 20 for pushing and pulling the clamp 7 for the upper mold 6 will be described with reference to FIG.
As will be described with reference to the following drawings, since the left and right push-pull devices 20 have left and right target configurations, the right push-pull device 20 will be described. As shown in FIGS. 2 to 4, the T-shaped leg 7 a of the clamp 7 is slidably mounted in a T-shaped groove 5 a on the lower surface of the slide 5 in the left-right direction. Next, the push-pull device 20 will be described. A two-tooth first sprocket 22 is rotatable on a block member 21 at the lower end of the push-pull device 20 by a horizontal drive shaft 22a oriented in the front-rear direction. And a block member 24 at the upper end of the push-pull device 20.
, A two-tooth sprocket 25 is rotatably supported by a horizontal drive shaft 25a oriented in the front-rear direction.

The push-pull device 20 is fixed to the side surface of the flange 5b of the slide 5 with a bolt or the like via a connecting block member 26. A chain member 27 with a roller connected at one end to the leg portion 7a of the clamp 7 extends laterally in a T-groove 5a formed on the slide 5, and the connecting block member 26 has a straight line in the T-groove 5a. A series of T-grooves 28 are formed.
A T-groove 29 linearly connected to the T-groove 28 and a 1 / 4-circle arc-shaped guide for engaging the first sprocket 22 and guiding the rollers 27a before and after the chain member 27 which is turned upward by 90 °. A guide portion 30 and a vertically oriented T groove 31 continuous with the guide portion 30 are formed (see FIG. 7).

The upper block member 24 has a vertical T-shaped groove 32 for receiving and guiding the chain member 27 extending through the first sprocket 22, and a second sprocket 25 connected to the T-shaped groove 32. Rollers 27a before and after the chain member 27 engaged with the second sprocket 25
Semicircular arc-shaped guide part 3 that guides in a semicircular shape along the upper side of
3 and a vertical T-groove 34 connected to the inner end of the guide portion 33.
Are formed (see FIG. 8).

Further, the block member 21 and the block member 2
4 is provided in a case 35, in which the first sprocket 22 and the second sprocket 25
Between the two sprockets 25, there is provided a chain receiving portion 36 for receiving the free end side portion of the chain member 27 which falls from the inside of the second sprocket 25 in a zigzag shape.
The front wall 37, rear wall 38, and inner wall 39 (see FIG. 5)
The outer wall 40 of the chain receiving portion 36 is formed by utilizing the case 35, and the outer wall 40 of the chain receiving portion 36 extends from the block member 21 to the lower side of the block member 24 along the inside of the chain member 27 extending from the first sprocket 22 to the second sprocket 25. It is formed of a partition member that extends to the vicinity and is fixed to the front wall 37 and the rear wall 38 of the case 35 with screws.

As a driving device 41 for driving the first sprocket 22 and the second sprocket 25 to rotate in the normal and reverse directions, a sprocket 43 for driving an endless chain 42 for rotational driving is provided on a driving shaft 22a of the first sprocket 22. A sprocket 44 for driving the endless chain 42 for rotational driving is provided on the drive shaft 25a of the second sprocket 25, and these sprockets 43, 44 are provided.
, A rotary drive endless chain 42 is mounted. Further, a drive shaft 22a of the first sprocket 22 is constituted by an output shaft of an electric motor 46, and the electric motor 46 allows the first sprocket 22 to rotate through a pair of upper and lower sprockets 22 and 25 and the endless chain 42 for rotational driving. The sprocket 22 and the second sprocket 25 are driven to rotate synchronously.

As described above, the chain member 27 with the roller connected to the clamp 7 is moved from the T groove 5a to the T grooves 28,2.
9 and extends to the first sprocket 22 to be engaged therewith, guided by the guide portion 30 and turned upward by 90 °, and then rises straight upward from the outside of the first sprocket 22 and passes through the T-groove 32. Engage with the second sprocket 25, change the direction by 180 degrees in a semicircle while being guided by the guide portion 33, extend into the chain housing portion 36, and retract the clamp 7 to the outermost position as shown in FIG. In the retracted state, the free end side portion of the chain member 27 is stored in the chain housing 36.

The roller-equipped chain member 27 has a configuration in which small-diameter rollers 27a are rotatably provided at both ends of a connecting pin of the chain member outside the link plate of the chain member. Since the buckling of the chain member 27 is restricted by being disposed in the wide groove portion of the T groove, not only pulling drive (pull drive) but also push drive (push drive) is possible. 47 is Case 3
5 is a stay for connecting the upper end of the slide 5 to the slide 5.

The operation of the push-pull device 20 described above will be described. When the electric motor 46 is driven to rotate clockwise in FIG.
7 is driven forward by the first and second sprockets 22 and 25, the clamp 7 is driven forward toward the center of the slide 5, and when the electric motor 46 is driven to rotate counterclockwise, the chain member 27 is driven. The clamp 7 is driven backward by the first and second sprockets 22 and 25, and the clamp 7 is driven backward by the side end of the slide 5. By the retraction drive of the clamp 7, the chain member 27 fed downward from the second sprocket 25 falls into the chain housing portion 36, and is stacked and stored in the chain housing portion 36 in a zigzag shape. .

As described above, the chain member 27 with the roller extending from the clamp 7 is turned upward by 90 degrees by the first sprocket 22, and the chain member 27 with the roller extending from the first sprocket 22 is Since the second sprocket 25 located above the one sprocket 22 is configured to change the direction by 180 degrees downward, the apparatus is suitable for pushing and pulling the clamp 7 for fixing the upper die of the press machine.

Since the chain member 27 with the roller extending downward from the second sprocket 25 is accommodated in the chain accommodating portion 36 between the first and second sprockets 22 and 25, the small chain accommodating portion 36 is provided. Since the long chain member 27 with rollers can be accommodated, the stroke of the push-pull drive can be increased without increasing the size of the device, and the chain accommodating portion 36 is a dead space between the first and second sprockets 22 and 25. The device can be formed more effectively, so that the size of the device can be further reduced. The push-pull device 1 for pushing and pulling the lower mold fixing clamp 4 in the above embodiment.
Reference numeral 0 indicates that the first sprocket is provided at the upper end in the case, and the chain housing is provided below the first sprocket.

In the above embodiment, the electric motor 46 drives the sprockets 43 and 44 and the chain 42 to
Although the first sprocket 22 and the second sprocket 25 are configured to be driven synchronously, they may be configured so that only the first sprocket 22 is driven to rotate forward and reverse. In addition, the above embodiment is directed to a push-pull device 2 suitable for push-pull driving of a clamp 7 for fixing an upper die of a press machine.
0, an example in which the present invention is applied has been described. However, the push-pull device 20 is a push-pull device that pushes and pulls tools such as clamps, and a work machined by a machine tool or a press machine. The present invention is similarly applicable to a device or a push-pull device that drives a work pallet of a machine tool by push-pull.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a press machine according to an embodiment.

FIG. 2 is a cross-sectional view of the push-pull device of FIG.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 2;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 2;

7 is a front view of the block member 21. FIG.

FIG. 8 is a front view of the block member 24.

[Explanation of symbols]

 7 Clamp 20 Push / Pull Device 22 First Sprocket 25 Second Sprocket 27 Chain Member with Roller 41 Drive Unit 42 Endless Chain for Rotation Drive 43,44 Sprocket 46 Electric Motor

Claims (1)

(57) [Scope of request for utility model registration] 1. A push-pull device for push-pull driving a chain member with a roller, one end of which is connected to a driving object, such as a work or a tool, to push-pull the driving object. A chain member with a roller connected to an object and the other end of which is a free end; a first sprocket that engages with a chain member with a roller extending horizontally from the driven object to change the direction upward by 90 degrees; A second sprocket that is disposed above the first sprocket and engages a chain member with a roller extending from the first sprocket to convert the direction to 180 degrees downward; formed between the first sprocket and the second sprocket; A chain accommodating portion for accommodating a chain member with a roller extending downward from a second sprocket; and at least the first sprocket A forward and reverse rotation drivable drive means, the workpiece and the tool movement driving push-pull device, characterized in that it comprises a.