JP2850555B2 - Work 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 an improvement in a mechanism for shortening an interval between a work holding section and a processing section of a rotary table in a work transfer apparatus.

[0002] In a work transfer mechanism having a plurality of processing units and a rotary table for holding a work to be transferred to a position corresponding to the processing units, the processing unit and the rotary table are not moved when the rotary table is stopped. In order to shorten the interval, an actuator for bringing each processing unit closer to the rotary table is provided for each processing unit, and when the number of processing units increases, a large number of actuators must be provided correspondingly.

[0003] Under the circumstances described above, there is a demand for a work transfer device capable of reducing the distance between the processing unit and the work holding unit without providing a large number of actuators.

[0004]

2. Description of the Related Art A conventional work transfer device having four processing units will be described in detail with reference to FIG.

[0005] In the work transfer apparatus having the four processing units 51, 52, 53, and 54 shown in the figure, work holding units 55a, 55b, 55c, and 55d are provided.
When the rotary table 55 is stopped by facing the processing units 51, 52, 53, 54, respectively, since the opposite side distance Y of the holding unit is shorter than the maximum outer diameter X of the rotary table 55, these holding units and There is an interval of (X−Y) 生 じ る 2 with the processing unit.

For this reason, conventionally, as shown in the drawing, actuators 56, 57, 58 and 59 are provided in each processing section, and when the rotary table 55 stops, all the processing sections are set to (X−Y) ÷ 2.
In order to rotate the rotary table 55 only inward, all the processing units are moved outward by (X−Y) ÷ 2.

Since the processing section must be moved in this way, a moving time is required in addition to the processing time in the processing section, and the total processing time becomes long. Also a rotary table
When rotating the 55, a sensor for confirming that the processing unit is at the outer position is provided, and complicated control including a large number of sensors must be performed.

[0008]

In the conventional work transfer apparatus described above, all of a large number of processing units must be moved each time the rotary table is rotated. Is required,
There is a problem that the total processing time becomes long, and a sensor for confirming that the processing unit is at the outer position when the rotary table is rotated must be provided to perform complicated control.

According to the present invention, it is possible to reduce the total processing time by moving the work holding section by a simple mechanism to approach the processing section and reduce the distance between the processing sections. It is intended to provide a work transfer device.

[0010]

A work transfer apparatus according to the present invention holds a plurality of processing units disposed on a concentric circle, a work at a position corresponding to the processing unit, and a rotation center at the center of the concentric circle. In the work transfer device provided with a rotary table having a rotary table, a holding unit for holding a work to be transferred is provided on the rotary table, and a plurality of the processing units and the holding unit are opposed to stop the rotary table. When
The holder is moved on the rotary table, and means for bringing the holder closer to the processor is provided.

[0011]

That is, in the present invention, as shown in FIG. 1, work holders 6, 7, 8, 9 that can move on the rotary table 5 are provided corresponding to the processing units 1, 2, 3, 4, When the rotary table 5 is rotated, the holding portions 6, 7, 8, 9 are moved inward, and when the rotary table 5 is stopped, the holding portions 6, 7, 8, 9 are moved outward to perform processing. Since the distances between the holding units 6, 7, 8, 9 and the processing units 1, 2, 3, 4 can be changed within a short time because they are close to the units 1, 2, 3, and 4, the total processing time can be reduced. It can be shortened.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a work transfer apparatus according to a first embodiment of the present invention will be described in detail with reference to FIG. 2, and a work transfer apparatus according to a second embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 2 is a plan view of a work transfer device according to a first embodiment of the present invention, FIG. 3 is a plan view of a work transfer device according to a second embodiment of the present invention, and FIG. FIG. 5 is a side view of the work transfer device according to the embodiment, and FIG. 5 is a diagram illustrating a shape of a groove cam plate of the work transfer device according to the second embodiment of the present invention.

In the work transfer device of the first embodiment having four processing units 11, 12, 13, and 14 shown in FIG. 2, the rotary table 15 has a position facing the processing units 11, 12, 13, and 14. The workpiece holders 16, 17, 18, and 19 are provided so as to be movable in the directions indicated by arrows in the figure.

A rotary shaft 35 concentric with the rotary table 15 and rotatable independently of the rotary shaft of the rotary table 15 is provided with holding portions 16, 17, 18, 19 and links 30, 31, 32, 33. The linked link drive plate 34 is fixed, and the rotating table 15 is stopped by causing the holding units 16, 17, 18, 19 and the processing units 11, 12, 13, 14 to face each other as shown in the drawing, and Drive plate 34 as rotating shaft
When rotated together with 35 in the clockwise direction in the figure, the holding parts 16, 17, 18, 19 are moved outward on the rotary table 15 by the links 30, 31, 32, 33, respectively, and the processing parts 11, 12, 13 , 1
4 can be approached.

In the work transfer device of the second embodiment having four processing units 21, 22, 23, 24 shown in FIG. 3, the rotary table 25 has a position facing the processing units 21, 22, 23, 24. The workpiece holders 26, 27, 28 and 29 are provided so as to be movable in the directions indicated by arrows in the figure.

A fixed shaft 45, which is concentric with and fixed to the rotary table 25, has holding portions 26, 27, 28, 29 and links 40, 41,
The link drive plate 44 connected by the
It is provided so as to slide.

As shown in FIGS. 3 and 4, for example, a cam follower for the holding portion 27 is provided on the lower surfaces of the holding portions 26, 27, 28, 29.
As shown in FIG. 27a, two cam followers are provided, and a groove cam plate 46 having a groove 46a in which these cam followers slide as shown in FIG. 4 is provided.

The grooved cam plate 46 has a shape as shown in FIG. 5, and when the rotary table 25 is rotated, as shown in FIG. 3 and FIG. Therefore, all the holding portions 26, 27, 28, and 29 are drawn toward the rotation center via the holding portion 27, the link 41, and the link driving plate 44.

When the rotary table 25 stops, the groove cam plate 46 is pushed outward by the cylinder 47.
All the holding units 26, 27, 28, 29 can be made to approach the processing units 21, 22, 23, 24 via the holding unit 27, the link 41, and the link driving plate 44.

When the link driving plate is rotated in a state where the link driving plate, the link and the holding portion are connected as described above, the holding portion and the processing portion can easily be opposed to each other when the rotary table is stopped. When the link driving plate 34 is rotated in the opposite direction, the holding unit can be easily moved to the inside of the rotary table to rotate the rotary table.

[0022]

As is clear from the above description, according to the present invention, a work holding portion having a very simple structure is provided on a rotary table, and this holding portion is mounted on the rotary table using a link driving plate and a link. Since the distance between the unit and the processing unit is reduced by moving, the total processing time can be reduced, and the mechanism such as an actuator and a sensor can be simplified, so that maintenance can be easily performed. In addition, it is possible to provide a work transfer device that can be expected to be significantly economical and to have an effect of improving reliability.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the operation of the present invention;

FIG. 2 is a plan view of the work transfer device according to the first embodiment of the present invention;

FIG. 3 is a plan view of a work transfer device according to a second embodiment of the present invention;

FIG. 4 is a side view of a work transfer device according to a second embodiment of the present invention;

FIG. 5 is a view showing a shape of a groove cam plate of a work transfer device according to a second embodiment of the present invention;

FIG. 6 is a plan view of a conventional work transfer device,

[Explanation of symbols]

1, 11, 21 are processing units, 2, 12, 22 are processing units, 3, 13, 23 are processing units, 4, 14, 24 are processing units, 5, 15, 25 are rotary tables, 6, 16, 2
6 is a holding part, 26a is a cam follower, 7, 17, 27 are holding parts, 27
a is a cam follower, 8, 18 and 28 are holding parts, 28a is a cam follower, 9, 19 and 29 are holding parts, 29a is a cam follower, 30, 31, and 3
2,33 is a link, 34 is a link drive plate, 35 is a rotating shaft, 40,41,
42 and 43 are links, 44 is a link drive plate, 45 is a fixed shaft, 46 is a groove cam plate, 46a is a groove, 47 is a cylinder,

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65G 47/80 B65G 47/84-47/86

Claims (3)

(57) [Claims] A plurality of processing units disposed on concentric circles;
A rotary table having a rotary table having a rotation center at the center of the concentric circle, wherein the rotary table (5) holds the workpiece to be transported. (6, 7, 8, 9), the plurality of processing units (1, 2, 3, 4) and the holding units (6, 7, 8, 9) are opposed to each other, and the rotary table (5) Means for moving the holding unit (6, 7, 8, 9) on the rotary table (5) to approach the processing unit (1, 2, 3, 4) when the operation is stopped. A work transfer device characterized by the following. 2. The work transfer device according to claim 1, wherein a rotary shaft (35) concentric with the rotary table (15) and a link drive plate (34) fixed to the rotary shaft (35) and rotatable together. )
And a link (30, 31, 32, 33) for coupling the link driving plate (24) and the holding portion (16, 17, 18, 19), respectively. . 3. The work transfer device according to claim 1, further comprising: a fixed shaft (45) concentric with the rotary table (25); and a rotatable link drive having a hole that slides on the fixed shaft (45). Board
(44), the link driving plate (44) and the holding portion (26, 27, 28, 2
9) and a cam follower (26) provided on the lower surface of the holding portion (26, 27, 28, 29).
a, 27a, 28a, 29a) and the groove to be fitted with the (26a, 27a, 28a, 29a)
A groove cam plate (46) provided with a groove (46a); and a cylinder (47) for changing a distance between the groove cam plate (46) and the processing section (21, 22, 23, 24).
And a work transfer device comprising: