JPH0573347U - Parallel switchgear - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to provide a parallel opening / closing device that always opens and closes smoothly. [Structure] Two pistons 26, 28 are arranged so as to approach and separate from each other in a single cylinder 12 having working fluid outlets, inlets 22, 23, 24 at its central portion and both end portions. The respective operating shafts 30, 32 of the pinion 18 are connected to the respective operating members 34, 36 so that the respective operating members 34, 36 have a single tooth portion with a single tooth.
The racks 14 and 16 that mesh with are provided respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a parallel opening / closing device that opens and closes in a horizontal direction by letting a working fluid such as pressurized oil flow into and out of a cylinder.

[0002]

[Prior Art]

 Conventionally, as the parallel opening / closing device, an operating member is fixed to a pair of racks, each tooth of which meshes with a single pinion, and one operating member slides in a cylinder to operate one piston. Some are connected to the shaft. In the opening / closing device, one operating member connected to an operating shaft of the piston and one rack fixed to the operating member move in the same direction as the piston in accordance with sliding of the piston, and mesh with the rack. The rotation of the pinion causes the other rack and the other actuating member fixed to the rack to move in the opposite direction to the one actuating member so that both actuating members open and close in parallel.

[0003]

[Problems to be solved by the device]

 However, in the parallel opening / closing device described above, the direct force by the sliding of one piston is applied only to one of the operating members, and the other operating member is only indirectly applied via the rack and the pinion. .. As a result, the forces applied to both actuating members are less likely to be uniform, and the actuating members often do not open and close smoothly due to the twisting force generated in the rack and pinion portions. Therefore, an object of the present invention is to provide a parallel opening / closing device that always opens and closes smoothly.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is arranged such that two pistons are arranged close to and away from each other in a single cylinder having a working fluid outlet / inlet at a central portion and both end portions, and each working shaft of the piston is disposed. Is connected to each operating member, and each operating member is provided with a rack in which each tooth portion meshes with a single pinion.

[0005]

[Action]

 In the parallel opening / closing device of the present invention, each of the operating members is connected to the operating shaft of each piston. Therefore, the force caused by the sliding of each piston is evenly applied to each of the operating members, and the twisting force is unlikely to be generated in the rack and the pinion portion, so that the operating member can be smoothly opened and closed.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 are views showing a closed state and an opened state of a parallel opening / closing device according to an embodiment of the present invention, and are sectional views taken along the line AA of FIG. FIG. 3 is a side view of the same embodiment. The parallel opening / closing device 10 of this embodiment is attached to an arm of a robot or the like to hold or release a grip of an article when the article is moved.

The body 11 of the parallel opening / closing device 10 is provided with a single cylinder 12 at the upper part, and racks 14 and 16, a pinion 18 and guide rods 46 and 48 from the center to the lower part. The cylinder 12 has inlets, outlets 22, 23 and 24 for working fluid such as pressurized oil at the center and both ends of the upper part, and two pistons 26 and 28 are arranged inside the cylinder 12 so as to approach and separate from each other. Has been done. The facing surfaces of the two pistons 26, 28 are smaller than the inner diameter of the cylinder 12 so that the pistons 26, 28 do not block the working fluid outflow port 22 at the center of the cylinder when the pistons 26, 28 approach each other. It has become. Further, on the opposite surfaces of the two pistons 26, 28, operating shafts 30, 32 extending in the longitudinal direction of the cylinder 12 are provided. The ends of the operating shafts 30 and 32 respectively project from the operating shaft insertion holes at both ends of the cylinder 12 to the outside of the cylinder 12 and are connected to the operating members 34 and 36. The actuating members 34, 36 are plate-shaped members having a substantially L-shaped cross section with the lower ends bent inward, and the bent portions of the lower ends constitute the article gripping parts 35, 37. In the figure, 38 is a piston packing and 40 is a gasket.

The racks 14 and 16 are slidably provided in parallel with the cylinder 12 so that the teeth of the racks 14 and 16 mesh with the pinion 18. One end portion 15 of one rack 14 is connected to one operating member 36, and the opposite end portion 17 of the other rack 16 is connected to the other operating member 34. The rack end portions 19 and 21 that are not connected to the actuating members 34 and 36 pass through the rack insertion holes 42 and 44 formed in the actuating members 34 and 36 located on the respective sides, and the actuating member 34. , 36 extends outward. The pinion 18 has its rotation axis orthogonal to the cylinder 12 and is pivotally supported by the body 11.

The two guide rods 46 and 48 are for guiding the operating members 34 and 36 when opening and closing them, and penetrate the body 11 in parallel with the racks 14 and 16 so that one ends thereof are operated. It is fixed to the members 34 and 36.

In the parallel opening / closing device 10 thus configured, when gripping an article with the grip portions 35 and 37, pressurized oil is supplied from the working fluid outflow ports 23 and 24 at both ends of the upper portion of the cylinder 12 as shown in FIG. Working fluid 50, 50, etc., flows into the back of the piston 26, 28 in the cylinder 12. As a result, the pistons 26, 28 are pushed from the back by the working fluids 50, 50 and slide together with the working shafts 30, 32 toward the center of the cylinder 12. The operating members 34 and 36 connected to the operating shafts 30 and 32 also move toward the center of the cylinder 12. As a result, the gap between the grips 35 and 37 at the end of the operating member is reduced, and the article is gripped between the grips 35 and 37. At that time, the working fluid 52 existing between the two pistons 26, 28 flows out of the cylinder 12 through the working fluid outflow port 22 at the center of the cylinder 12.

On the other hand, when the gripping of the article by the gripping portions 35 and 37 is performed, the working fluid 52 such as the pressurized oil is discharged from the working fluid outlet / inlet 22 in the center of the cylinder 12 as shown in FIG. It is introduced between the two pistons 26 and 28. As a result, the two pistons 26, 28 are pushed by the working fluid 52 toward both ends of the cylinder 12 and slide together with the operating shafts 30, 32 toward both ends of the cylinder 12, and the grips 35, 37 opens. The working fluid 50, which has been present in the cylinder 12 at the back of the pistons 26, 28, flows out of the cylinder 12 through the working fluid outflow ports 23, 24 at both ends of the cylinder.

At the time of gripping and releasing the grip of the article, force is evenly applied from the pistons 26 and 28 to the operating members 34 and 36 via the operating shafts 30 and 32, so that the operating members 34 and 36 are smoothly moved. Open and close. Further, the racks 14 and 16 and the pinion 18 adjust the opening and closing timings of both operating members 34 and 36, and guide the operating members 34 and 36 at the time of opening and closing, so that both operating members 34 and 36 are also guided. , 36 will open and close smoothly.

[0013]

[Effect of the device]

 As shown and described above, in the parallel opening / closing device of the present invention, two pistons are arranged in the cylinder so as to approach and separate from each other, and the working member is connected to the working shaft of the pistons, so that the working member is smoothly operated. Open and close. Further, the parallel opening / closing device of the present invention can be used not only for gripping articles but also for various purposes, and is extremely useful in industry.

[Brief description of drawings]

1 is a cross-sectional view showing a closed state of a parallel opening / closing device according to an embodiment of the present invention, which is a cross-sectional view taken along the line AA of FIG.

FIG. 2 is a sectional view showing an opened state in the embodiment.

FIG. 3 is a side view of the embodiment.

[Explanation of symbols]

 12 cylinders 14 racks 16 racks 18 pinions 26 pistons 28 pistons 30 working shafts 32 working shafts 34 working members 36 working members

Claims (2)

[Scope of utility model registration request] 1. Two pistons are arranged in a single cylinder having a working fluid inflow and outflow port at a central portion and at both end portions so as to approach and separate from each other, and each working shaft of the piston is connected to a respective working member. In addition, the parallel opening / closing device is characterized in that each of the operating members is provided with a rack whose tooth portion meshes with a single pinion. 2. The parallel opening / closing device according to claim 1, wherein the actuating member is a member for gripping an article.