JPH0516144U - Jig cart - Google Patents

Abstract

(57) [Summary] [Purpose] To move the work by moving on a smooth or non-smooth floor surface, and improve the positioning accuracy of the jig carriage that functions as a processing jig in the stationary position. In a jig carriage 10 provided with at least three distributed support wheels under the floor and provided with a connector 4 with a stationary machine 3, the jig carriage 10 is guided and positioned at a connection position with the stationary machine 3. A pair of rails 20 for arranging the rails, and at least one pair of positioning fixed wheels 12 engaging with the rails are provided inside the floor of the jig carriage 10. The positioning fixed wheels 12 engage with the rails 20. A jig cart that allows the support wheels to float above the floor level and be positioned when performing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a jig carriage, and more particularly to a jig carriage having excellent positioning performance.

[0002]

[Prior art and problems]

 Conventionally, in order to make a stationary machine such as a robot perform two or more different types of work, it is necessary to replace the work set jig each time, and even in this case, the jig carriage must always be on a smooth floor surface. It was not uncommon that the work had to be moved by moving on a relatively rough concrete floor, which had a lot of unevenness, rather than moving.

However, the work transferred from the A point to the B point must be accurately positioned at the B point, and the next process, such as spot welding, must be performed according to a sequence that follows a predetermined geometry by the program. .. However, if the floor surface is concave or convex, accurate positioning is difficult, and improvement is required.

However, there is a problem that it is not easy to do this by improving the equipment at low cost.

Then, as a result of earnest studies, the present inventor has found that the above problems can be solved by laying a rail near a positioning point, and arrived at the present invention.

[0006]

[The purpose of the device]

 An object of the present invention is to move a work by moving on a smooth or non-smooth floor surface, and improve the positioning accuracy of a jig carriage that functions as a processing jig in a stationary position.

[0007]

[Device configuration]

 According to the present invention, in the jig carriage 10 which is provided with at least three distributed support wheels under the floor and has the connector 4 with the stationary machine 3, the jig carriage 10 is provided at the connection position with the stationary machine 3. A pair of rails 20 for guiding and positioning the rails are laid, and at least one pair of positioning fixing wheels 12 engaging with the rails are provided inside the floor of the jig carriage 10. There is provided a jig truck characterized in that the supporting wheel is positioned above the floor level when engaged with 20.

The present invention will be described in detail below with reference to examples.

[0009]

【Example】

 1 is a side view of an embodiment of the present invention, FIG. 2 is a view taken along the line AA of FIG. 1, and FIG. 3 is a plan view of FIG. 4 is a plan view of the rail, FIG. 5 is a view taken along the line BB of FIG. 4, and FIG. 6 is a layout diagram of the stationary machine and the jig carriage. 1 is a parallel fixed wheel with a rubber tire, 2 is a caster with a rubber tire, 3 is a stationary machine (for example, a welding machine), 4 is a coupler, 5 is a truck frame, 6 is a thrust bearing of the caster 2, and 10 is a jig truck. , 12 is a parallel fixing wheel for positioning, 20 is an inverted V-shaped section rail, 21 is a rail guide, 21A is a rail guide expansion part, 22 is a steel plate sleeper, 23 is a welded part, and 24 is a nut.

In FIGS. 1 and 2, a jig carriage 10 is pivotally mounted on a frame 5, a work support 7 and a fork 1 A of a pair of parallel fixed wheels 1 fixed to the lower surface of the frame 5 and a thrust bearing 6 at the rear. The caster 2 fork 2A is provided.

The fixed wheel 1 and the casters 2 are solid wheels with rubber tires to cope with a slightly rough floor surface. It should be noted that these may be casters with four wheels, or three wheels, one pair of fixed wheels and one caster.

Under the floor of the jig carriage 10, a pair of fixed wheels 1 and two pairs of positioning fixed wheels 12 inside the casters 2 are pivotally mounted via forks 12A, respectively.

These two pairs (four in total) of the fixed fixing wheels 12 for positioning are V-shaped concave section wheels made of steel, which are fitted to a pair of rails described below to position the jig carriage 10. To do.

In this embodiment, the rails are a pair of inverted V-shaped rails in cross section. Of the two rails, only one may be a rail having an inverted V-shaped cross section, and the other rail may be a smooth steel plate (for example, a hot-rolled steel plate having a thickness of about 8 to 10 mm) and supported by a flat wheel.

In short, these perform positioning on the floor plane in the X direction.

The cutout portion 20A shown at the left end of the rail in FIG. 1 is for reducing the step when the positioning fixed wheel 12 rides on the rail 20 to facilitate engagement. Although the cross section AA of the cutout portion is not shown in FIG. 2, it has a configuration in which the inverse V gradually increases like a mountain range.

What is important here is that, as is apparent in FIG. 2, when two pairs of positioning fixed wheels 12 ride on a pair of rails 20, the fixed wheels 1 and casters 2 that are support wheels are placed between the floor and the floor surface. The height of the fork 12A is designed so that the gap G is lifted up and the whole weight of the jig carriage 10 is supported by the two pairs of positioning fixed wheels 12. The fixed wheel 1 and the casters 2 have radial bearings (not shown) in the former case and the thrust bearing 6 in the latter case, so that the gap G may not appear in some cases. Most of the weight of the bearing is supported by the positioning fixed wheel 12, and when positioned, it is within the technical scope of the present invention.

Further, a rail guide 21 is welded to the introduction part of the rail 20 as shown in FIGS. 4 and 5, and when the positioning fixed wheel 12 approaches, these are smoothly introduced into the rail 20. The rail guide 21 is widened in a V shape in a plan view (FIG. 4) to help the introduction of the fixed wheel for positioning.

In FIGS. 1 and 3, a coupler 4 is fixed to the front end portion of the jig carriage 10. When the tip joint portion of the jig carriage 10 is pressure-bonded to the stationary machine 3, the jig carriage is stopped to move in the Y direction. Be positioned at. As shown in FIG. 6, in the type in which the jig carriage moves to the left and right of the stationary machine, the coupler is attached to the side surface of the jig carriage in the traveling direction.

The coupler 4 may be a one-touch mechanical male / female fitting only, but a part of the coupler 4 may also be provided with an electrical and / or compressed air coupler to allow electrical and / or compressed air conduction. This can be done (for example, Shoukai 63-151231).

By doing so, it is possible to provide an electric or compressed air-movable work receiving base 7 movable in the XYZ directions on the upper part of the jig carriage 10, and together with the movement of the working head of the stationary machine 3, the work receiving base 7 can be moved. It is possible to process burrs at high speed.

Particularly, the compressed air is convenient for moving and gripping the work by utilizing the stall effect and driving the screw shaft by a vane type air motor or the like and reciprocating motion by an air cylinder.

It should be understood that a limit switch for confirming that the coupler 4 is securely joined to the stationary machine 3 is naturally provided mainly on the stationary machine side 3 side.

Further, the jig cart itself may be a self-propelled jig cart that is electromagnetically guided by a floor buried guide wire.

[0025]

[Effect of the device]

 By practicing the present invention, all of the above objectives are achieved.

That is, it is possible to improve the positioning accuracy of the jig carriage that moves on a relatively uneven floor surface and functions as a processing jig at the stationary position.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a plan view of the rail.

5 is a view taken along the line BB of FIG.

FIG. 6 is a layout diagram of the stationary machine 3 and the jig carriage 10.

[Explanation of symbols]

 1 Parallel fixed wheel with rubber tire 2 Castor with rubber tire 3 Stationary machine 4 Coupling 5 Bogie frame 7 Work cradle 10 Jig trolley 12 Parallel fixed wheel for positioning 20 Reverse V-shaped rail 21 Rail guide

Claims (3)

[Scope of utility model registration request] 1. A jig carriage 10 having at least three support wheels arranged in a distributed manner under the floor and having a connector 4 with a stationary machine 3, wherein the jig carriage 10 is provided at a position where the stationary machine 3 is connected. A pair of rails 20 for guiding and positioning are laid, and at least one pair of positioning fixed wheels 12 that engage with the rails are provided inside the floor of the jig carriage 10. The positioning fixed wheels 12 are provided on the rail 20. When engaged, the jig wheel is characterized in that the supporting wheels are floated above the floor level and positioned. 2. The rail according to claim 1, wherein at least one rail is an inverted V-shaped rail with a guide for guiding the positioning fixed wheel 12, and the positioning fixed ring 12 is a concave wheel with a V-shaped cross section. Jig dolly. 3. The jig cart according to claim 1, wherein the jig cart is a self-propelled jig cart guided by a floor buried guide wire.