JPH06218457A - Transfer device for press - Google Patents

Abstract

PURPOSE:To provide a transfer device for a press capable of supressing the damage on the main body of a finger having a holding part to hold a work, even if the finger is interfered with an obstacle. CONSTITUTION:The finger 31 for holding a work is constituted of the main body 32 of the finger, which is provided with the holding part 33 capable of holding the work, and an attaching part 39 by which the main body 32 of the finger is attached to the side of a feed bar 21. The main body 32 of the finger is axially supported rotatably in the horizontal direction against the attaching part 39 and is held with the regulating member 47 interposed, which is capable of preventing a horizontal rotation at ordinary times. When the main body 32 of the finger is interfered with the obstacle G, the prevention of the rotation of the main body 32 of the finger is released by the regulating member 47, the main body 32 of the finger is rotated, and the damage due to the interference with the obstacle G is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device of a press machine for holding a work and sequentially transferring it to a predetermined die.

[0002]

2. Description of the Related Art Conventionally, in this type of transfer device, feed bars are arranged on both sides of a plurality of dies for performing a predetermined process in parallel with the arranging directions of the dies, and the feed bars face each other. A finger capable of holding the work is provided in a protruding manner on the surface (Japanese Patent Laid-Open No. 63-160733).
(See Japanese Patent Publication).

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. It should be noted that the square-shaped movement of the fingers is performed by the intermittent reciprocating motion of the feed bar in parallel with the direction in which the molds are arranged, and the intermittent reciprocating motion of the fingers orthogonal to the feed bar, or , The feed bar itself to which the fingers are fixed moves in a square shape.

[0004]

However, in the conventional transfer apparatus, the guide post for positioning the die is slightly moved when the timing of finger movement is slightly deviated from the timing of opening and closing the die. In some cases, the fingers moved and interfered with the guide post before being completely removed, and the fingers were damaged.

In this case, the finger is provided with a holding part having a shape corresponding to the work and having a high manufacturing cost so that the work can be held with a delicate force, and the damage becomes great.

[0006] Such finger damage is such that when the work is not properly gripped, the subsequent fingers interfere with the work, or the residual material after processing interferes with the fingers. And may be damaged.

The present invention is to solve the above-mentioned problems, and provides a transfer device for a press machine, which is capable of suppressing damage to a finger having a holding portion for holding a work even if the finger interferes with an obstacle. The purpose is to provide.

[0008]

A transfer device according to the present invention comprises a finger main body having a holding portion capable of holding the work, and a mounting portion for mounting the finger main body on the feed bar side. The finger body is rotatably supported in the horizontal direction with respect to the mounting portion, and a regulation member capable of preventing the normal horizontal rotation is interposed. , Is retained.

[0009]

In the transfer device according to the present invention, when the finger body of the finger interferes with the obstacle, the restricting member releases the rotation inhibition with respect to the attachment portion of the finger body, and the finger body is attached to the attachment portion. On the other hand, it rotates in the horizontal direction to prevent damage due to interference with obstacles.

Therefore, in the transfer device according to the present invention, even if the finger interferes with the obstacle, it is possible to suppress damage to the finger body having the holding portion for holding the work.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 has a large number of molds M (M
1, M2, ...) are arranged in a press machine P provided with a driving mechanism 1 arranged on the left end side of the press machine P and a lateral direction which is a direction in which the mold M is installed in parallel. Two feed bars 2 placed in front of and behind the mold M in parallel with
1, a finger 31 arranged to face each feed bar 21 in the front-rear direction, and a finger bar 51 arranged in the left-right direction for moving the opposed fingers 31 closer to or further from each other, It is configured with.

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

The rods 11 and 11 are connected to slide rods 12 which are slidably connected to the rods 11 at their tip ends and are fixed so as not to slip out, and each rod 12 is a link axially supported by a feed bar 21. 13 is pivotally supported. The tip side of the link 13 is pivotally supported by the finger bar 51. In addition, 14 is a rod 11 and a rod 12.
It is a connecting tool for connecting and.

The rods 15 and 15 are fixed to a base 16 which connects the feed bars 21 to each other.
6 is provided with a relief mechanism 17 for releasing the pressing force applied to the feed bar 21 when an excessive pressing force is applied to the feed bar 21 from the rod 15.

The escape mechanism 17 includes the feed bars 21.
Pin 17a that fits into the recess 21a of the pin, a pressing block 17b that abuts on the base side of the pin 17a, and the pressing block 1
And an air cylinder 17c that presses 7b. 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 the obstacle while moving in the left-right direction in FIG. 1, the pin 17a moves the pressing block 17b to the left side while coming off the recess 21a, and the slider 9 The driving force of the connecting rod 15 is operated so as not to be 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 also connected to the right end by the base (not shown). Further, each feed bar 21 is supported by a guide (not shown) so as to be movable in the left-right direction on the bolster B.

As shown in FIGS. 1 to 3 to 5, the fingers 31 are opposed to each other and hold the work W by a holding portion 3.
3 is provided with a finger main body 32 provided with 3 and an attachment portion 39 for attaching the main body 32 to a predetermined feed bar 21.

In the case of the embodiment, the holding portion 33 of each finger main body 32 is formed by forming a substantially V-shaped recess 33a on the end face of the tip, and the degree of processing of the work W in order from the holding portion 33 on the left side. In accordance with the above, the shape of the concave portion 33a is correspondingly configured. Further, each finger body 32 has a through hole 34 formed at the center portion in the front-rear direction, and a notch hole 35 having an open left side is formed at an end portion on the opposite side of the holding portion 33.

A flanged nut 36 is inserted into each through hole 34, and the nut 36 has a mounting portion 3 attached thereto.
A bolt 37 inserted from the lower side on the 9 side is screwed, and each finger main body 32 is horizontally rotatable around a nut 36 portion.

Each mounting portion 39 has a nut 36 on the front end side.
The through hole 40 into which the bolt 44 can be inserted is formed, and the through hole 41 into which the bolt 44 is inserted is formed on the base side. The bolt 44 to be inserted into the through hole 41 is the pin 4
6, which is screwed into the flanged nut 45 inserted into the pin 6, and the pin 46 is inserted into the engagement hole 52a of the link 52 connected to the finger bar 51.

The link 52 has a substantially V-shape in a plan view. The bent portion is pivotally supported by the feed bar 21 using the pin 22, and the end portion on the opposite side of the engaging hole 52a is formed. Pin 53 for finger bar 51
Is rotatably supported by using.

A screw hole 42 is formed between the through hole 40 and the through hole 41 of each mounting portion 39 at a position corresponding to the notch hole 35 of the finger body 32. The notch hole 35 and the screw hole 42. A regulating member 47 for preventing the normal rotation of the finger main body 32 that rotates in the horizontal direction around the nut 36 is provided in the and.

Each regulating member 47 is arranged between a bolt 48 that is screwed into the screw hole 42 through the cutout hole 35, a washer 50 that abuts the peripheral edge of the cutout hole 35, and a bolt head 48a and the washer 50. And a plurality of disc-shaped disc springs 49. When the torque for rotating the finger main body 32 in the horizontal direction becomes larger than the frictional force between the finger body 32 and the mounting portion 39 of the finger main body 32 or the washer 50, the respective regulating members 47 of the finger main body 32 move. The rotation prevention will be released.

Reference numeral 43 denotes projections protruding from the right and left side surfaces of the mounting portion 39, and these projections 43 are rotatably fixed to the feed bar 21 by using pins 24. Are engaged. By holding and guiding the guide rollers 23, the fingers 31 move toward and away from each other by the movement of the finger bar 51.

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 in 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. Then, connecting rod 11 ・ 15
As the slide rod 12 moves, the feed bar 2
1.21, and the finger bars 51, 51 reciprocate in a predetermined left-right direction, so that each finger 31.
Makes a square-shaped movement in a plan view. Therefore, the workpieces W at the standby position S0 are sequentially subjected to the predetermined dies M1 and M2.
············ d to the predetermined processing.

The fingers 31, 31 are the work W.
In the middle of gripping and transferring, the finger body 32 interferes with an obstacle such as the guide post G of the mold M, and a torque for rotating the finger body 32 around the nut 36 in the horizontal direction is generated. When the frictional force between the mounting portion 39 of the finger body 32 and the washer 50 due to the urging force of the disc spring 49 becomes larger than that of the washer 50 and the screw hole 42, as shown in FIG. The finger body 32 is disengaged and the nut 36 is inserted so as to avoid the interference with the obstacle G.
It is possible to prevent damage due to interference with the obstacle G by rotating around the part.

At this time, in order to stop the operation of the press P, a sensor such as a photoelectric switch for detecting that the finger body 32 has rotated is arranged at a predetermined position such as the mounting portion 39. , The sensor is the finger body 3
When the rotation of 2 is detected, the operation of the press machine P is stopped. Then, the opening / closing timing of the mold M and the timing of the square-shaped movement of the fingers 31 are adjusted, or the work W that has not been grasped properly, the residual material after processing, and the like are removed to remove unnecessary obstacles G. After the occurrence is prevented, the press machine P including the transfer device T may be restarted.

Further, in the embodiment, the disc spring 49 is used as the regulating member 47 for preventing the rotation of the finger body 32, but a coil spring may be used instead of the disc spring 49, or , Notch hole 35 and screw hole 42
It is also possible to dispose magnetic members that mutually attract each other at the positions of and, and to prevent the rotation of the finger main body 32 by utilizing the attraction force.

Further, as the regulating member 47, a shearable shear pin may be used so that the shear pin is fitted into the cutout hole 35 and the screw hole 42.

Furthermore, as the regulating member 47, a coil spring is used, one end of the coil spring is connected to the finger main body 32, and the other end is attached to the mounting portion 39 or the feed bar 31.
In the normal gripping operation of the work W, the finger body 32 does not rotate, and when a predetermined torque or more is applied to the finger body 32, the coil spring is compressed or pulled, and You may comprise so that 32 may rotate.

Further, as the regulating member 47, as shown in FIGS. 7 and 8, the regulating member 57 using a ball plunger is used.
Also good. This ball plunger 57 has a mounting portion 3
The ball 57a fixed to the finger body 9 and urged by a built-in spring,
It is fitted to a. In this configuration, when the finger body 32 is interfered with by the obstacle G and a torque larger than a predetermined value is applied to the finger body 32, the concave portion 32a releases the fitting with the ball 57a, and the finger body 32 rotates. In this configuration, since the finger body 32 can rotate in either direction, various obstacles G can be dealt with.

Further, in the embodiment, each feed bar 21 is intermittently reciprocated in the left-right direction, and each finger 31 is intermittently reciprocated in the front-rear direction. However, as shown in FIG. Attach the mounting portion 39 to the feed bar 21
Alternatively, the feed bar 21 itself may be fixed so as to be integrated therewith and moved in a square shape in a plan view.

[Brief description of drawings]

FIG. 1 is a schematic partial plan view of a press 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.

FIG. 6 is a plan view showing a state where the finger body of the embodiment is rotated.

FIG. 7 is a plan view showing another restriction member.

FIG. 8 is a schematic cross-sectional view showing a VIII-VIII portion of FIG.

FIG. 9 is a plan view showing another embodiment.

[Explanation of symbols]

 21 ... Feed bar, 31 ... Finger, 32 ... Finger main body, 33 ... Holding part, 39 ... Mounting part, 47 ... Restricting member, 48 ... Bolt, 49 ... Disc spring, 50 ... Washer, P ... Press machine, T ... Tlance Fur device, W ... Work.

Claims (1)

[Claims] 1. A finger for holding a work is configured by including a finger main body having a holding portion capable of holding the work, and a mounting portion for mounting the finger main body on a feed bar side, the finger main body comprising: A press machine, which is rotatably supported by the mounting portion in a horizontal direction, and is held by interposing a restricting member capable of preventing the horizontal rotation in a normal state. Transfer device.