JPH0643304U - Positioning device for moving table - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to position and fix the position of the moving table at a number of positions with a simple structure. [Structure] A movable table 14 is mounted on a base 11 so as to be reciprocally movable in a linear direction. A first stopper 15 and a second stopper 16 are attached to both ends of the base 11, and a dual cylinder 17 is attached to the first stopper 15. This dual cylinder 17 has two pneumatic cylinders 2.
The first and second pistons 23 and 22 of the pneumatic cylinder 21 are connected to each other, and the piston rod 23 of the pneumatic cylinder 21 is connected to the first stopper 15 and the piston rod 2 of the pneumatic cylinder 22 to the other side.
4 is attached to the moving table 14. The forward and backward movement strokes of the piston rods 23 and 24 of these pneumatic cylinders 21 and 22 are different. Therefore, the moving table 14 can be positioned and fixed at four positions by one dual cylinder 17.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a moving table positioning device that positions and fixes a moving table that supports a work at a number of linear positions.

[0002]

[Prior art]

 In the case where the workpiece is mounted on the moving table and the workpiece is sequentially machined at multiple locations, the moving table supporting the workpiece is moved sequentially after each machining process is completed. I am trying to let you. When the workpiece is relatively light and the position to be positioned is arranged on a straight line, a pneumatic cylinder is used to position the moving table by an inexpensive positioning device.

FIG. 1 is a plan view showing a conventional positioning device. A guide rail 2 is linearly provided on the upper surface of a base 1, and a guide table 3 slidable on the guide rail 2 is provided with a movable table. 4 is attached. As a result, the movable table 4 can reciprocate in the linear direction along the guide rail. In order to drive the moving table 4 in a linear direction, a first cylinder 5 which is pneumatically operated is attached to the base 1, and a piston rod 6 of the first cylinder 5 is fixed to the moving table 4.

Therefore, the moving table 4 can be positioned and fixed at the position where the piston rod 6 of the first cylinder 5 is in the forward limit and the position where it is in the rearward limit. The first cylinder 5 is a single rod type pneumatic cylinder, and it is possible to position the moving table 4 at the forward limit position and the backward limit position with high accuracy by a simple structure. It is not easy to position the moving table 4 at a position intermediate between the positions 1 and 2 with high precision.

Therefore, in order to position the moving table 4 at the intermediate position, the second cylinder 7 is attached to the base 1 so as to face the first cylinder 5. The state in which the piston rod 8 of the second cylinder 7 is in the forward limit position is shown in FIG. 1, and the tip of the piston rod 8 in the forward limit is brought into contact with the moving table 4 to move the moving table. 4 is positioned in the intermediate position. In this way, the movable table 4 is positioned and fixed at a total of 3 positions.

[0006]

[Problems to be solved by the device]

 As shown in Fig. 1, even if two cylinders 5 and 7 that can be positioned at two positions are arranged facing each other or arranged in parallel, only three positions can be positioned. is there. In this way, even if the number of cylinders is simply increased in order to increase the number of positions that can be positioned, one of the forward limit and backward limit positions will always be shared by multiple cylinders. The possible number is n × 2- (n-1), where n is the number of cylinders.

Therefore, even if the number of pneumatic cylinders is increased, there is a limit to the increase in the number that can be positioned. Must be provided, and the volume of the cylinder occupying the positioning device becomes large, so that downsizing of the device cannot be achieved.

An object of the present invention is to enable the moving table to be positioned at a large number of positions with a small number of cylinders.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0010]

[Means for Solving the Problems]

 The following is a brief description of the outline of the typical invention disclosed in the present application.

That is, in the moving table positioning device of the present invention, the moving table is mounted on the base so as to be capable of reciprocating in the linear direction, and the piston rods project from the one end to the forward and backward moving spontaneously so that the forward and backward moving strokes are mutually performed. The two different pneumatic cylinders are integrally joined together at their end portions to form a dual cylinder, and stoppers are provided at both ends of the base, and at least one of the stoppers and the movable table are described above. It is a positioning device for a moving table, which is equipped with a dual cylinder.

[0012]

[Action]

 A movable table is mounted on the base so that it can reciprocate linearly between the stoppers provided at both ends, and one of the two pneumatic cylinders forming the dual cylinder is set at the forward limit position and the backward limit position. By setting the position to the position, the moving table can be positioned and fixed at two positions, and by setting the other pneumatic cylinder at the forward limit position and the backward limit position, the moving table is set at the two positions. be able to .

Accordingly, the moving table can be positioned at a total of four positions by one dual cylinder formed by the two pneumatic cylinders. If the dual cylinders are arranged on both sides of the moving table, the moving table can be positioned in more positions than this, and the dual cylinder with a simple structure can move and position the moving table in multiple positions. .

[0014]

【Example】

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 2 is a front view showing a positioning device for a moving table according to an embodiment of the present invention, in which a top guide rail 12 of a base 11 is provided linearly and is slidable on the guide rail 12. A moving table 14 is attached to the guide table 13 shown in FIG. A work (not shown) is placed on the moving table 14, and the work is processed.

As shown in FIG. 2, a first stopper 15 is provided at one end of the base 11 and a second stopper 16 is provided at the other end of the base 11, and the first stopper 15 and the movable table are provided. A dual cylinder 17 is mounted between the two cylinders 14. The dual cylinder 17 is formed by two single rod type pneumatic cylinders 21 and 22. In other words, the piston rods 23 and 24 project from one end of each of the pneumatic cylinders 21 and 22 so that the piston rods 23 and 24 can move forward and backward, and the dual cylinder 17 is connected by integrally connecting the ends where the piston rods 23 and 24 do not project. Has been formed.

Further, the strokes of the forward and backward movements of the piston rods 23 and 24 are different from each other. Thereby, the movable table 14 can be positioned and fixed at four positions by one dual cylinder 17.

The piston rod 23 of one pneumatic cylinder 21 is screwed to the first stopper 15 using a nut 25, and the piston rod 24 of the other pneumatic cylinder 22 is screwed to a moving table using a nut 26. Are combined. A stopper plate 27 is fixed to the tip end surface of one pneumatic cylinder 21, and a stroke adjustment for restricting the position of the dual cylinder 17 when the piston rod 23 of the pneumatic cylinder 21 retracts to the first stopper 15 The bolt 31 is attached.

The second stopper 16 is provided with a stroke adjusting bolt 32 that comes into contact with the moving table 14 and regulates the position of the moving table 14. Therefore, by supplying the fluid from the pneumatic hoses (not shown) to the two pneumatic cylinders 21 and 22 which form the dual cylinder 17, the piston rods 23 and 24 of the pneumatic cylinders 21 and 22 are respectively moved. The movable table 14 is moved to two positions, that is, the forward limit position and the backward limit position, so that the moving table 14 can be positioned and moved to a total of four positions by the two pneumatic cylinders 21 and 22.

As a guide method for reciprocating the moving table 14 in a linear direction, as shown in FIG. 2, in addition to the method of using the guide rail 12, as shown in FIG. 3, both stoppers 15 and 16 are used. A guide rod 12a may be attached between the two. In the case shown in FIG. 3, a linear guide member 13a having a ball incorporated therein is used as the guide table that slides linearly along the guide rod 12a. Other configurations of the positioning device for the moving table shown in FIG. 3 are the same as those shown in FIG. 2, and in FIG. 3, members common to those shown in FIG. Has been done.

Next, a procedure for positioning and moving the moving table 14 by the positioning device shown in FIG. 3 will be described with reference to FIG. Incidentally, the moving procedure is the same in the positioning device of the type shown in FIG.

In FIG. 4A, the piston rods 23 and 24 of the two pneumatic cylinders 21 and 22 forming the dual cylinder 17 are both retracted, and the pneumatic cylinder 21 is provided on the tip end surface thereof. The stopper plate 27 is in contact with the stroke adjusting bolt 31. At this time, the position of the moving table 14 is located on the rightmost side in the drawing, and the position is set by the stroke adjusting bolt 31, the two nuts 25 and 26, and the screwing amounts of the piston rods 23 and 24.

In FIG. 4 (B), the piston rod 23 of one pneumatic cylinder 21 is advanced to the forward limit position, and the piston rod 24 of the other pneumatic cylinder 22 is retracted in the same manner as in FIG. 4 (A). The movable table 14 is positioned at the limit position, and the moving table 14 is positioned at a position on the left side of the drawing as compared with the position shown in FIG. The stroke of the moving table 14 shown in FIGS. 4 (A) to 4 (B) is set by adjusting the amount of screwing of the piston rod 23 by the nut 25 and the stroke adjusting bolt 31.

FIG. 4C shows a state in which the piston rod 23 of the pneumatic cylinder 21 is in the backward limit position and the piston rod 24 of the pneumatic cylinder 22 is in the forward limit position. Is set to be longer than the stroke of the piston rod 23, the moving table 14 moves to the left in the figure from the position shown in FIG. 4 (B). This position is set by the screwing amount of the piston rod 24 by the nut 26 and the stroke adjusting bolt 31.

FIG. 4D shows a state in which the piston rods 23 and 24 of both the pneumatic cylinders 21 and 22 are projected to the forward limit position, and the moving table 14 is on the left side at the maximum distance. Be moved. At this time, the position of the moving table 14 is regulated by the stroke adjusting bolt 32 provided on the stopper 16, and the stop position is set.

As shown in the drawing, a dual cylinder 17 formed by two pneumatic cylinders 21 and 22 having forward and backward movement strokes different from each other is provided with a dual cylinder 17 of two stoppers 15 and 16 provided at both ends of the base 11. By providing the movable table 14 between one side and the movable table 14, the movable table 14 can be positioned and fixed at a total of four positions. Therefore, by using the single-rod type pneumatic cylinders 21 and 22 that can position up to two positions with a simple structure, the positioning positions are increased from the conventional one, and a total of four positions can be set. The movable table 14 can be positioned and fixed.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in addition to the above embodiment, the present invention can position and fix the moving table 14 at a total of seven positions by providing the dual cylinders 17 having the above-described structure on both sides of the moving table 14. .

[0028]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.

That is, according to the present invention, two pneumatic cylinders, each of which can be positioned at two positions, are joined at their ends to maximize the ability of each pneumatic cylinder. The moving table can be positioned at a large number of positions with a simple structure and a low cost device.

Further, by making the strokes of the piston rods of the two pneumatic cylinders different from each other, the moving table can be positioned and fixed at a large number of positions, for example, four positions, by one dual cylinder.

[Brief description of drawings]

FIG. 1 is a plan view showing a conventional positioning device for a moving table.

FIG. 2 is a front view showing a positioning device for a moving table according to an embodiment of the present invention.

FIG. 3 is a front view showing a positioning device for a moving table according to another embodiment of the present invention.

FIG. 4 is a front view showing a positioning procedure of a moving table.

[Explanation of symbols]

 1 base 2 guide rail 3 guide table 4 moving table 5 first cylinder 6 piston rod 7 second cylinder 8 piston rod 11 base 12 guide rail 12a guide rod 13 guide table 13a linear guide member 14 moving table 15 first stopper 16 Second stopper 17 Dual cylinder 21 Pneumatic cylinder 22 Pneumatic cylinder 23 Piston rod 24 Piston rod 25 Nut 26 Nut 27 Stopper plate 31 Stroke adjusting bolt 32 Stroke adjusting bolt

Claims (1)

[Scope of utility model registration request] 1. A two-pneumatic cylinder having a movable table mounted on a base so as to be reciprocally movable in a linear direction and having a piston rod projecting forward and backward from one end thereof and having different forward and backward moving strokes. Of the moving table, wherein a dual cylinder is formed by integrally connecting the moving table with stoppers at both ends of the base, and the dual cylinder is attached between at least one of the stoppers and the moving table. Positioning device.