JPS61270041A - Position change device for work instruments - Google Patents

Abstract

PURPOSE:To make it possible to use work instruments in common and reduce the number of instruments by moving a base equipped with work instruments between specified work positions along a guide rail and guide groove. CONSTITUTION:A guide rail 3 and guide groove 4 are fixed to a frame 5 corresponding to the locus of a base 1 of a T like shape which is determined according to the numbers and positions of work positions A thru D depending on a nut runner 2. Wheels 6a, 6b, and 6c are supported at the liberty of rotation through bearing members fitted in the holes 7a, 7b, and 7c formed at both the ends of the head section 1a and the end section of a leg section 1b of the base 1. A guide roller 8 is supported at the liberty of rotation at both the ends of the head section 1a of the base 1 and leads the base 1 along a specified locus being fitted in the guide groove 4. A drive mechanism A moves specified work positions along the guide rail 3 and guide groove 4.

Description

[Detailed Description of the Invention] 1. The present invention relates to a position changing device for working equipment, and more specifically, a position changing device for moving a predetermined working equipment between a plurality of separated working positions and positioning it at a predetermined working position. This invention relates to a conversion device.

For example, on an automobile body assembly line, work equipment such as nut runners and welding machines is fixedly installed at fixed positions in each process, and the work equipment is used to assemble and process various parts. ing. In the assembly or processing process of this type of parts, multiple work positions are usually arranged at predetermined intervals, and each work position is Work equipment is located. Various parts are assembled and processed by sequentially operating the work equipment arranged at each work position.

■ (If you adopt the arrangement layout of the work tJ31 equipment as shown above, a large number of work equipment must be placed at each work position, so the number of work equipment must be the same as the number of work positions. For this reason, conventional car body assembly lines and the like have been recognized to have problems such as increased capital investment and soaring product costs.

. The present invention has been proposed in view of the above-mentioned problems, and consists of a substantially T-shaped base on which a predetermined work equipment is attached, and a base determined by the number and position of work positions by the work equipment. A guide rail and a guide groove arranged along a movement trajectory, and wheels rotatably supported on both ends of the head and leg ends of the base and supporting the base at three points on the guide rail. , a guide roller that is rotatably supported on both ends of the head of the base and that fits into a guide groove provided along the guide rail to guide the base along the movement trajectory; The gist of the present invention is a position changing device for working equipment, which includes a rail and a drive mechanism for moving the tool between predetermined working positions along a guide groove.

By movably arranging the work equipment between a plurality of work positions, it becomes possible to share the work equipment, so that the above-mentioned problems associated with the conventional technology can be easily solved.

An embodiment of the device for changing the position of work equipment according to the present invention will be explained with reference to FIGS. 1 to 5. In FIGS. It is a substantially T-shaped base on which a device, for example, nut runners (2), (2) (2 in the illustrated embodiment) are mounted, and (3)
, (3) and (4) are the nut runners (2) and (2) above.
) are guide rails and guide grooves fixed to the frame (5) corresponding to the movement locus of the base (1) determined by the number and position of work positions (A) to (D). This guide groove (4) is connected to the base (
It is provided in an integral structure with the arrangement position corresponding to the guide rail (3) fixedly installed on the frame (5) along the movement locus on the head side of (1).

(6a), (6b), (6c)j are the above base (1)
is rotatably supported via bearing members fitted into holes (7a), (7b), and (7c) formed at both ends of the head (1a) and at the ends of the legs (1b). The base (1) is supported at three points on the guide rails (3), (3) by wheels. In this way, the wheels (6a), (6b), (6
In c), the base (1) is supported at three points on the guide rails (3), (3) according to the movement trajectory of the base (1) determined by the number and position of the work positions. This is to form a position changing mechanism for the working equipment that moves the base (1) under the guidance of the guide rails (3), (3) and the guide ill (4). (8), (8)
The guide rollers are rotatably supported on both ends of the head (1a) of the base (1), and are fitted into the guide grooves (4) to move the base (1) along a predetermined movement trajectory. Induce. (A) is the drive mechanism of the base (1), and (
9) is a fluid pressure cylinder mechanism, for example, a hydraulic cylinder mechanism, which is fixed to the frame (5) and functions as a drive source for the base (1), and the rod (10) of this hydraulic cylinder mechanism (9) is connected to the inside of the cylinder. By switching the flow path of the hydraulic oil flowing into the oil chamber, the base (1) is caused to move forward and backward along the movement trajectory. The tip (108) of the rod (10) is pivotably attached to a support bracket (lc) attached to the head (1a) of the base (1) via an arm (11). . The tip (10a) of the rod (1o) and the support bracket (lc) of the base (1) are connected by an arm (11) located on the head side of the base (1). The movement trajectory of the axis (11a) of the arm (11) is
Pivot (11b) of arm (11) on rod (10) side
Even if it does not match the movement trajectory of Nand Runner (2
), (2) to form a movement trajectory compensation mechanism that allows accurate movement trajectory to be drawn.

(12), (12) are base position regulating devices fixed to the frame (5), and when the base reaches the working position (
1) It regulates the stopping positions at both ends. This base position regulating device (12) is connected to a support frame (13) fixed to a frame (5) as shown in FIGS. 4 and 5.
), an air cylinder (14) is attached to the air cylinder (14), a support rod (16) is installed at the tip of the rod (15) of the air cylinder (14), and positioning bins (16) are installed at both ends of the support rod (16). 17) and (17) are fixed together.

When the base (1) reaches the working position (A), (B) or (C), (D), the legs (
1b), and is fixed to the support frame (13) of the base position regulating device (12) so as to face the recesses (18), (1B). Concave grooves (20), (20) of blocks (19), (19)
) The positioning pins (17), (17) are fitted between the base (1) and the base (1) to accurately position the base (1) at a predetermined working position.

The operating procedure of the position converting device having the above configuration will be explained below. First, as shown in Figure 1, the nut runners (2), (2) mounted on the base (1) are placed in the working position (
When positions A) and (B) are reached, the loft (15) of the air cylinder (14), which functions as a stopper for the base position regulating device (12), is operated to protrude, and the positioning bins (17), (17 ) in the recess (18) of the base (1)
, (18) and blocks (19), grooves (20) of (19)
) and (20), the base (1
). In this state, use the above nut runner (
2), The screw tightening work is performed at work positions (A) and (B) according to (2). When the screw tightening work is completed, the rod (15) of the air cylinder (14) is actuated to release the position restriction of the base (1), and
Switch the flow path of the hydraulic oil to the oil chamber of the hydraulic cylinder mechanism (9) and retract the rod (10) 1° Due to the movement of the rod (10), the flow of hydraulic oil to the rod (10) via the arm (11) A guide roller (8) whose connected base (1) is slidably fitted into the guide groove (4).
, (8) while being guided by the wheels (6a), (6b
), the guide rail (3) under rotational support by (6c),
(3) Hang it and move it. Then, the base (1) moves along the movement locus regulated by the guide rails (3), (3) and the guide groove (4) and reaches the other working position, and the nut runner (2), ( 2) are placed at the working positions (C) and (D). At this time, the base position regulating device (12)
The rod (15) of the air cylinder (14) is operated to protrude, and the positioning bins (17), (17) are moved to the recesses (18), (18) of the base (1) and the blocks (19), (19).
The base (1) is inserted between the concave grooves (20) and (20) of the base (1).
to the working positions (C) and (D). In this state, the screw tightening work is performed by the nut runners (2) and (2). Once this work is completed,
The rod (15) of the air cylinder (14) is moved in and out to release the position restriction of the base (1), and the rod (10) of the hydraulic cylinder mechanism (9) is moved in and out to move the base (1). By moving the base (1) along the guide rails (3), (3) and the guide groove (4), the base (1) is brought to the above-mentioned initial state, that is, the nut runners (2), (2) are moved to the working positions (A), (B). ).

By repeating the above operation, the first working position (A
), (B) and two NAND runners (2), (2) that can be shared in the second working positions (C), (D) separated from the working positions (A), (B). Screw tightening can do the work.

In the above embodiment, the nut runners (2) and (2) of 211&I, which can be used in common, are attached to the base (1), and the screw tightening at the four working positions (A) to (D) is performed without any work. Although the case where the above two nut runners (2) and (2) are used has been described, the present invention is not limited to this, and the nut runners that should be attached to the base (1) depending on the number of working positions are described. The number of can be changed. In addition, in the above embodiment, an embodiment is exemplified in which the movement locus of the base (1) is regulated by a guide rail and a guide groove having a substantially arc shape, but the number and position of work positions are explained as examples. It is also possible to change the shape of the movement trajectory of the base (1) according to the guide rail (3), which determines the movement trajectory of the base (1) from the same point of view.
(3) and the shape of the guide groove (4) are also not limited to the embodiment described in J-. Furthermore, the drive mechanism (A) of the base (1)
), hydraulic cylinder mechanism and air cylinder tata
It is also possible to use a drive source other than the hydraulic cylinder mechanism such as the t, for example, a step motor.

In the above embodiments, screw tightening using a nut runner has been described as an example of general application to work, but the present invention can also be applied to work equipment other than a nut runner, such as a spot welding machine, in the same manner.

From 1Bγ Kami.

According to the present invention, it is possible to share the work equipment by mounting the work equipment so that it can be freely transferred between work positions without having to fixedly arrange the work equipment for each work position. Therefore, it is possible to reduce the number of work equipment, and
It is possible to have a remarkable effect on saving investment and reducing product cost.

[Brief explanation of the drawing]

FIG. 1 is a front view illustrating a position changing device for working equipment according to the present invention, FIG. 2 is a side sectional view of FIG. 1, and FIG. 3 is a partial side view illustrating a base and a drive mechanism for the base. FIG. 4 is a side view of the base position regulating device, and FIG. 5 is a front view of FIG. 4. (1) - Base, (2) One working device (nut runner), (3) - Guide rail, (4) - Guide groove, (
6a), (6b), (6c) - Wheels, (8) - Guide roller, (A) - Drive mechanism. Figure 4 Figure 5

Claims (1)

[Claims] (1) a substantially T-shaped base on which a predetermined work equipment is mounted; a guide rail and a guide groove arranged along a movement locus of the base determined by the number and position of work positions by the work equipment; wheels that are rotatably supported on both ends of the head and leg ends of the base and that support the base at three points on guide rails, and wheels that are rotatably supported on both ends of the head of the base; , a guide roller that fits into a guide groove provided along the guide rail and guides the base along the movement trajectory; and a guide roller for transporting the base between predetermined work positions along the guide rail and the guide groove. What is claimed is: 1. A position converting device for working equipment, characterized by comprising: a drive mechanism;