JPH0677931U - Transfer device of press machine - Google Patents

Abstract

(57) [Summary] [Purpose] A transfer of a press machine that can easily secure a large stroke of the finger, can change the stroke of the finger easily with a simple structure, and can also support high speed press working. Providing equipment. [Configuration] A finger 31 for holding a work is held so as to be movable in a direction orthogonal to the feed bar 21,
It is connected to the finger bar 41 via a cam lever 51, and moves by the relative movement of the finger bar 41 with respect to the feed bar 21. The cam lever 51 is pivotally supported by the feed bar 21, and is provided with lever portions 53 and 54 extending from the pivotally supported portion and connected to the fingers 31 and the finger bar 41, respectively. The lever portion 53 is pivotally supported by the finger bar 41. The lever portion 54 is fitted and inserted between the rotatable free rollers 37 provided on the finger 31, and is connected to the finger 31.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transfer device of a press machine that holds a work and sequentially transfers it to a predetermined die.

[0002]

[Prior art]

 Conventionally, in this type of transfer device, feed bars are arranged on both sides of a plurality of molds that perform predetermined processing in parallel to the direction in which the molds are arranged side by side, and work pieces are held so that they face each other. Possible fingers were provided protruding.

Then, the fingers extending from each feed bar move in a square shape in a plan view, and sequentially transfer the work to a predetermined die. This square-shaped movement of the fingers was performed by the intermittent reciprocating movement of the feed bar in parallel with the direction in which the molds were arranged, and the intermittent reciprocating movement of the fingers at right angles to the feed bar.

This movement is caused by the fingers being held movably with respect to the feed bar in the direction orthogonal to the moving direction of the feed bar, and with respect to the finger bar moving in parallel with the feed bar. They were connected via a link, and the fingers were configured to move in a direction orthogonal to the moving direction of the feed bar by relative movement of the finger bar with respect to the feed bar.

Regarding the shape of the above-mentioned link, an L-shaped one as described in Japanese Utility Model Laid-Open No. 63-202432 and a one-letter type as described in JP-A-63-160733. It has been known.

[0006]

[Problems to be solved by the device]

 However, in the transfer device using the L-shaped link described in the former publication, when gripping a work, the fingers are projected from the feed bar using the biasing force of the spring, and when the grip of the work is released, the transfer device uses the link. The finger was returned against the biasing force of the spring.

Therefore, when the stroke of the finger (the distance that the finger moves in the direction orthogonal to the feed bar) is increased, the length of expansion and contraction of the spring becomes long, and the durability of the spring is reduced. In addition, since the urging force of the spring is increased, it is necessary to increase the strength of the shaft supporting portion of the link and the like, resulting in an increase in weight, which is difficult to handle, and only a stroke of about 10 to 20 mm can be secured.

When it is necessary to increase the stroke of the finger, for example, there is a case where press working is sequentially performed from a large outer shape to a small outer shape. That is, it is necessary to make the stroke of the finger large so that a work having a small outer shape can be gripped. Further, even when the die structure is formed in the horizontal direction, it is necessary to increase the finger stroke. That is, it is necessary to separate the fingers from the mold that opens and closes in the horizontal direction so that the fingers do not interfere with the mold.

Further, in the transfer device using the one-letter-shaped link described in the latter publication, two cam members are arranged at both ends of the link pivotally supported by the finger bar, and these two cam members are connected to each other. It has a complicated structure such as arranging it on the feed bar and the feed bar respectively, and in the case of changing the stroke, for example, when dealing with it by increasing the moving distance of the finger bar, at least the link and the two I had to replace the three parts with the cam, which was not easy to deal with.

This invention can easily secure a large stroke of the finger, can easily change the stroke of the finger as a simple structure, and can also correspond to a high-speed press processing transfer device. The purpose is to provide.

[0011]

[Means for Solving the Problems]

 In the transfer device according to the present invention, the finger holding the work is held by the feed bar so as to be movable in the direction orthogonal to the moving direction of the feed bar, and the finger bar moving in parallel with the feed bar is used. On the other hand, a transfer device of a press machine, which is connected via a cam lever and moves the fingers in a direction orthogonal to the moving direction of the feed bar by relative movement of the finger bar with respect to the feed bar. The cam lever is pivotally supported by the feed bar, and includes lever portions that extend from the pivotal support portion and are connected to the fingers and the finger bar, respectively. Is pivotally supported on the finger bar, and the finger of the cam lever is Side lever portion, is fitted inserted between two rotatable free roller provided on the fingers, characterized that you are connected to the finger.

[0012]

[Operation and effect of the device]

 In the transfer device according to the present invention, when the finger bar moves relative to the feed bar, the cam lever that pivotally supports the finger bar side lever portion on the finger bar causes the cam bar to center on the pivotal support portion with the feed bar. Rotate as.

Then, as the finger-side lever portion of the cam lever rotates, the two free rollers of the finger that are in sliding contact with the finger-side lever portion rotate, and the finger moves relative to the feed bar. It will reciprocate in the orthogonal direction. At that time, the two rollers of the finger rotate while slidingly contacting the finger-side lever portion, and the finger moves, so that the finger can move with a large stroke as the cam lever rotates.

Further, in the finger drive structure of the transfer device according to the present invention, the cam lever is simply pivotally supported by the feed bar, and one finger bar side lever portion extending from the pivotal support portion to both sides is used for the finger. It has a simple structure in which it is pivotally supported by a bar, and the other finger side lever portion is fitted between two rotatable free rollers provided on the fingers and connected to the fingers.

Therefore, when changing the stroke of the finger, when adjusting the moving distance of the finger bar, the cam lever is replaced with a cam lever having a finger-side lever portion of a predetermined shape corresponding to the moving distance. If you change the finger stroke or do not adjust the movement distance of the finger bar, move the cam lever's shaft support part with respect to the feed bar to separate the finger lever part and finger bar lever part. Even if the finger bar has the same reciprocating distance, the finger stroke can be easily changed by replacing the cam lever with a different angle and length. In addition, when adjusting the distance between the finger bar and the feed bar, if the cam lever is replaced with a finger bar side lever part of a predetermined shape according to the distance, the finger bar reciprocates. Even if the distance is the same, the stroke of the finger can be easily changed.

[0016] These strokes are changed in accordance with whether or not the reciprocating movement distance of the finger bar is changed and the arrangement position of the finger bar is changed. This can be done easily because the position can be changed easily.

Further, the finger drive structure is simple, and even if the press working speed is increased, it can be dealt with without any trouble.

Therefore, in the transfer device according to the present invention, it is possible to easily secure the stroke with large fingers, and also to change the stroke of the finger easily with a simple structure, and also to cope with the speeding up of press working. it can.

[0019]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the transfer device T of the embodiment is arranged in a press machine P provided with a large number of molds M (M1, M2, ...) For sequentially processing a work W. , A driving mechanism 1 arranged on the left end side of the press P and two driving mechanisms 1 arranged in front of and behind the mold M so as to be parallel to the left-right direction which is the direction in which the molds M are arranged in parallel. Feed bar 21, fingers 31 arranged so as to face each other in the front-rear direction, and finger bars arranged in the left-right direction for moving the opposing fingers 31 toward and away from each other. 41, and is comprised.

As shown in FIGS. 1 and 2, the drive mechanism 1 has a rotating shaft 3 which is rotated by taking in power from a drive mechanism (not shown) of the press machine P and which is rotatably supported in the case 2. Two cams 4 and 5 are fixed to the. These cams 4 and 5 are engaged with sliders 8 and 9 to which cam followers 6, 6, 7 and 7 are brought into contact. Further, these sliders 8 and 9 fix two connecting rods 11 and 15, respectively. A balancer 10 is slidably held by the case 2 and engages with the cam 5.

Each of the rods 11 and 11 is connected to a slide rod 12 which is slidably connected to the rod 11 at its tip end side and cannot be pulled out, and each rod 12 is axially supported by a feed bar 21. It is pivotally supported by the link 13. The tip side of the link 13 is pivotally supported by the finger bar 41. In addition, 14 is a connecting tool which connects the rod 11 and the rod 12.

The rods 15 and 15 are fixed to a base 16 that connects the feed bars 21 to each other. When an excessive pressing force acts on the base 16 from the rod 15 to the feed bar 21, An escape mechanism 17 for releasing the pressing force on the feed bar 21 is provided.

The escape mechanism 17 includes a pin 17a that fits into the recess 21a of each feed bar 21, a pressing block 17b that abuts against the base of the pin 17a, and an air cylinder 17c that presses the pressing block 17b. It is equipped with. The pins 17a and 17a are slidably supported by guide blocks 17d and 17d fixed to the base 16. The operation of the escape mechanism 17 is such that when the feed bar 21 interferes with an obstacle during the movement in the left-right direction in FIG. 1, the pin 17a moves the pressing block 17b to the left side and comes out of the recess 21a, and the slider 9 moves. It operates so that the driving force from the connecting rod 15 is not transmitted to the feed bar 21.

The respective feed bars 21 are connected to each other by the base 16 at the left end, and are also connected to each other at the right end by the base (not shown). Each feed bar 21 is supported by a guide (not shown) on the bolster B so as to be movable in the left-right direction.

As shown in FIGS. 1 to 3 to 5, each of the fingers 31 has a holding portion 32 capable of holding the work W, which is opposed to each other, at the tip thereof, and has two rotatable members on the upper surface on the base side. The free rollers 37 are arranged along the moving direction of the fingers 31.

In the case of the embodiment, the holding portion 32 of each finger 31 is formed by forming a substantially V-shaped concave portion 32 a on the end face of the tip, and the holding portion 32 on the left side is processed in order from the holding portion 32 on the left side. The shape of the recess 32a is correspondingly formed according to the degree.

The free rollers 37, 37, two of which are provided for each finger 31, are attached by attachment pins 34. Each mounting pin 34 is provided with a collar portion 34 a, a shaft portion 34 b, and a male screw portion 34 c in order from above, and the male screw portion 34 c is penetrated through a through hole 33 formed in the finger 31 and a nut 35 is provided on the rear surface side of the finger 31. It is fixed to the finger 31 by being stopped. A free roller 37 is rotatably arranged on the outer periphery of the shaft portion 34b of each mounting pin 34 with a bearing 36 interposed.

Further, projections 38 having a mountain-shaped cross section are formed on the left and right side surfaces of each finger 31 along the forming direction of the fingers 31, and these projections 38 are provided with the pins 24 for the feed bar 21. A guide roller 23 that is rotatably fixed is engaged. By holding and guiding the guide rollers 23, the fingers 31 move in a direction orthogonal to the feed bar 21 by the relative movement of the finger bar 41 with the cam lever 51 interposed therebetween relative to the feed bar 21. It will move back and forth.

Each of the cam levers 51 has a substantially V shape in a plan view, is provided with a shaft support hole 52 in a bent portion, and is inserted into the shaft support hole 52 and fixed to the feed bar 21 by a pin 22. It is rotatably supported by the feed bar 21. The portions extending from the shaft supporting portion to both sides are the finger bar side lever portion 53 and the finger side lever portion 54.

A shaft support hole 53a is formed at the tip of the finger bar side lever portion 53, and the pin 53 is inserted into the shaft support hole 53a and fixed to the finger bar 41. The bar side lever portion 53 is pivotally supported by the finger bar 41.

In addition, the finger-side lever portion 54 is formed such that its tip is curved, and the curved portion 54 a is fitted between the two free rollers 37 of the finger 31. The thickness of the curved portion 54a from the base portion side to the tip portion side is formed to be equal to the gap between the two free rollers 37 of the finger 31. The curved shape of the curved portion 54a is formed in a predetermined curved line so that when the cam lever 51 rotates, the curved portion 54a comes into contact with the two free rollers 37 of the finger 31. .

Next, the operation mode of the transfer device T of the embodiment will be described. First, when the work W is transferred to the standby position S0 of FIG. 1, the cams 4 and 5 rotate together with the rotating shaft 3. , The sliders 8 and 9 are moved back and forth in the left-right direction.

At that time, the slider 8 first moves to the right side in FIG. 1 first, and approaches the slider 9 side as shown in FIG. Then, the connecting rods 11 and 11 move to the right side in FIG. 1, and the finger bars 41 and 41 move relative to the feed bars 21 and 21 to the left side in FIG. Each cam lever 51 pivotally supporting the finger bar side lever part 53 on the bar 41 rotates about the pivot support part 52 with the feed bar 21 (at this time, the rear row of each cam lever 51). Side cam lever 51 rotates counterclockwise, and the front row side cam lever 51 rotates clockwise).

As the finger-side lever portion 54 of each cam lever 51 rotates, the two free rollers 37, 37 of the finger 31, which are in sliding contact with the curved portion 54 a of the finger-side lever portion 54, rotate. The fingers 31 move in the direction orthogonal to the feed bar 21, and the opposing fingers 31 approach each other and hold the work W by the holding portions 32.

At that time, since the two rollers 37 of the finger 31 rotate while slidingly contacting the curved portion 54a of the finger side lever portion 54, the finger 31 moves, so that the cam lever 51 rotates, The finger 31 can move with a large stroke.

After that, the sliders 8 and 9 both move to the right side. Then, the connecting rods 11, 11, 15, and 15 are moved to the right side together, and the feed bars 21 and 21 and the finger bars 41 and 41 are integrally moved to the right side, and each finger is moved. The works W held by 31 are transferred to the next mold M, respectively.

After that, the slider 8 precedes and moves to the left side, and is separated from the slider 9 side. Then, the connecting rods 11 and 11 move to the left side in FIG. 1, and the finger bars 41 and 41 move to the right side in FIG. 1 relative to the feed bars 21 and 21. Each cam lever 51, which pivotally supports the finger bar side lever portion 53 on the working bar 41, 41, rotates about the pivotally supporting portion 52 with the feed bar 21 (at this time, the rear row side of each cam lever 51). Cam lever 51 rotates clockwise, and the cam lever 51 on the front row side rotates counterclockwise).

As the finger-side lever portion 54 of each cam lever 51 rotates, the two free rollers 37, 37 of the finger 31 slidingly contacting the curved portion 54 a of the finger-side lever portion 54 rotate. The fingers 31 move in a direction orthogonal to the feed bar 21, and the fingers 31 facing each other are separated from each other, and the work W is separated (see FIG. 3).

At that time, the two rollers 37 of the finger 31 rotate while slidingly contacting the curved portion 54 a of the finger side lever portion 54, and the finger 31 moves, so that as the cam lever 51 rotates, The finger 31 moves with a large stroke and returns.

After that, the sliders 8 and 9 both move to the left side. Then, the connecting rods 11, 11, 15, and 15 are both moved to the left side, and the feed bars 21 and 21 and the finger bars 41 and 41 are integrally moved to the left side, and each finger is moved. 31 completes the square-shaped motion in the plan view, and the above-described operation is repeated thereafter, and the work W at the standby position S0 is sequentially transferred to the predetermined molds M1, M2, ... Predetermined processing will be performed.

When the stroke of each finger 31 is changed and the movement distance of the finger bars 41, 41 is adjusted by changing the shape of the cam 4 or the like, the movement distance of the finger bar 41 is adjusted according to the movement distance. When changing the stroke of the finger 31 or changing the moving distance of the finger bars 41, 41 by replacing the cam lever 51 with the finger-side lever portion 54 having the curved portion 54a of a predetermined shape, By moving the pin 22 that pivotally supports the cam lever 51 and replacing it with the cam lever 51 in which the angle and length of the finger lever portion 54 and the finger bar lever portion 53 are changed, the finger bars 41, 41 can be replaced. The stroke of the finger 31 can be easily changed even if the reciprocal movement distances are the same. Further, when the distance between the finger bars 41, 41 and the feed bars 2 1, 21 is adjusted by changing the links 13, 13 or the shaft supporting portions thereof, the shape of the filter having a predetermined shape is corresponding to the distance. If the cam lever 51 is provided with the gang bar lever portion 53, the stroke of the finger 31 can be easily changed even if the finger bars 41 have the same reciprocating distance.

The change of these strokes corresponds to each finger 31 according to the presence / absence of the change of the reciprocating distance of the finger bars 41, 41 and the change of the arrangement position of the finger bars 41, 41. Since it can be easily dealt with by exchanging the cam lever 51 of the component or changing the position of the shaft supporting portion, it can be easily performed.

Further, since the driving structure of the fingers 31 is simple, even if the press working is speeded up, it is possible to cope with it without any trouble.

By the way, in the transfer device T of the embodiment, the stroke of the finger 31 was set to 50 mm, and it was possible to dispose the transfer device T in a press machine of 150 rpm.

In the embodiment, the curved portion 54a formed on the finger-side lever portion 54 of the cam lever 51 has a shape curved so as to be separated from the mold M side. When the angle of the finger side lever portion 54 closest to the die M on the base side is parallel to the feed bar 21, the curved portion 54a of the finger bar side lever portion 54 is attached to the die M. The shape may be curved so as to approach each other.

Of course, when the finger side lever portion 54 may be arranged with a gap provided between the two free rollers 37 of the finger 31, the curved portion 54a may not be formed, and the finger may be linearly formed. The side lever portion 54 may be formed.

In the transfer device T of the embodiment, the guide roller 23 is used as the means for holding the finger 31 movably with respect to the feed bar 21. However, as a matter of course, other means is used. Alternatively, a guide groove, a guide rail, or the like may be provided on the side surface of the finger 31, and a guide rail, a guide groove, or the like may be provided on the feed bar 21 side to deal with the problem.

[Brief description of drawings]

FIG. 1 is a schematic partial plan view of a press machine equipped with a transfer device according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing a drive mechanism of the transfer device of the embodiment.

FIG. 3 is an enlarged plan view showing a finger portion of the transfer device according to the embodiment.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a front view of a finger portion of FIG.

[Explanation of symbols]

 21 ... Feed bar, 31 ... Finger, 37 ... Free roller, 41 ... Finger bar, 51 ... Cam lever, 52 ... (Axis support part) Shaft support hole, 53 ... Finger bar side lever part, 54 ... Finger side lever part , P ... Press machine, T ... Transfer device, W ... Work.

Claims (1)

[Scope of utility model registration request] 1. A cam lever with respect to a finger bar that holds a workpiece so as to be movable with respect to a feed bar in a direction orthogonal to a moving direction of the feed bar, and that is parallel to the feed bar. Is a transfer device of a press machine in which the fingers are moved in a direction orthogonal to the movement direction of the feed bar by relative movement of the finger bar with respect to the feed bar, wherein the cam lever is The lever bar is pivotally supported by the feed bar, extends from the pivotally supporting portion, and includes lever portions respectively connecting the finger and the finger bar, wherein the finger bar side lever portion of the cam lever is the finger bar. Is pivotally supported on the finger side lever portion of the cam lever, A transfer device for a press machine, characterized in that the transfer device is fitted between two rotatable free rollers provided in the above and is connected to the fingers.