JPH0560783U - Parallel hand device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a parallel hand device, the generation of rotational torque in the parallel hand part is prevented, wear of the steel ball row is reduced, durability and opening and closing accuracy are improved, and the life of the steel ball row is improved. extend. [Structure] In the parallel hand device, a structure is provided in which the force points of the opening / closing driving force are provided at the positions of the parallel hand portions 15a and 15b corresponding to the rolling axis 20 of the steel ball row 19.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a parallel hand device, and more particularly to a technique effective when applied to a parallel hand device that opens and closes in a state where parallel hand parts face each other in parallel.

[0002]

[Prior Art]

 An example of this type of parallel hand device is shown below.

That is, in this parallel hand device, guide grooves are arranged on the sliding surface of the cover and the sliding surface of the parallel hand portion along the opening / closing direction, and a steel ball row is provided between the guide grooves facing each other. The structure is such that the force point of the opening / closing driving force is provided at the position of the parallel hand portion which is arranged and is separated from the rolling axis of this steel ball row.

[0004]

[Problems to be solved by the device]

 However, the structure of the conventional parallel hand device described above has a structure in which the force point of the opening / closing driving force is provided at the position of the parallel hand part that is separated from the axis of the steel ball row, so There has been a problem that a rotating torque with the moving shaft center as a rotation center is generated in the parallel hand portion, and an excessive force is applied to the steel ball row.

Therefore, there has been a problem that wear of the steel ball row is increased, durability and opening / closing accuracy are deteriorated, and the life of the steel ball row is shortened.

An object of the present invention is to provide a parallel hand device capable of preventing the generation of a rotating torque in a row of rolling parts.

Another object of the present invention is to provide a parallel hand device capable of reducing wear of the rolling element row, improving durability and opening / closing accuracy, and extending the life of the rolling element row. is there.

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.

[0009]

[Means for Solving the Problems]

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

The parallel hand device of the present invention is arranged between the sliding surface of the cover and the sliding surface of the parallel hand part, and is a rolling guide for guiding the parallel hand parts in the opening / closing direction while facing each other in parallel. A parallel hand device comprising a row of parts and a fluid pressure cylinder part for opening and closing the parallel hand part, the position of the parallel hand part corresponding to the rolling axis of the rolling part row or the vicinity thereof. The structure is such that an opening / closing driving force point is provided at the position.

[0011]

[Action]

 According to the parallel hand device of the present invention, since the force point of the opening / closing driving force is provided at or near the position of the parallel hand part corresponding to the rolling axis of the rolling guide, No rotating torque is generated and excessive force is not applied to the rolling element row.

Therefore, it is possible to reduce wear of the rolling part row, improve durability and opening / closing accuracy, and extend the life of the rolling part row.

[0013]

【Example】

 1 is a sectional view showing a parallel hand device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.

The parallel hand device in this embodiment has a pneumatic cylinder unit 1. A rod hole 3, a packing storage chamber 4 and a cylinder chamber 5 are coaxially formed in a cylinder body 2 of the pneumatic cylinder unit 1. An end cover 6 is attached to an opening end of the cylinder chamber 5 and a retaining ring 7 is provided. It is locked out.

A piston 8 is slidably provided in the cylinder chamber 5, and the piston 8 divides the cylinder chamber 5 into first and second cylinder chambers 5a and 5b, and the first cylinder chamber 5a is a closed port. 9, and the second cylinder chamber 5b communicates with the open port 10.

A piston rod 11 is fixed to the piston 8, and the piston rod 11 penetrates the rod packing 12 and the rod hole 3 in the packing accommodating chamber 4 and extends to the rod side.

A pair of covers 14a, 14b are provided at the rod-side end of the cylinder body 2 so as to face each other via coupling portions 13a, 13b, and a pair of parallel hand parts 15a, 15b are provided between the pair of covers 14a, 14b. The structure is such that it can be opened and closed when 15b face each other in parallel.

That is, guide grooves 18a and 18b having a V-shaped cross section are formed on the sliding surfaces 17a of the parallel hand portions 15a and 15b and the sliding surfaces 17b of the covers 14a and 14b, respectively, in the opening / closing direction, and A steel ball row (rolling portion row) 19 is rotatably arranged between the opposing guide grooves 18a and 18b.

Further, a pair of stoppers 27a and 27b are formed between the both covers 14a and 14b so that the strokes of the parallel hand portions 15a and 15b are restricted.

A stepped through hole 23 is formed in one cover 14 a of the both covers 14 a and 14 b, a screw hole 16 is formed in the other cover 14 b, and a head portion is engaged with the through hole 23. The stopped residual pressure adjusting bolt 24 is screwed into the screw hole 16 and has a function of adjusting the residual pressure between the steel ball row 19 and the guide grooves 18a and 18b by screwing.

The present embodiment is characterized in that the force points F of the opening / closing driving force are provided at the positions of the parallel hand portions 15a and 15b corresponding to the rolling axis 20 of the steel ball row 19.

More specifically, a pair of cushion levers 21 a and 21 b are provided between the pair of parallel hand portions 15 a and 15 b and the piston rod 11, and one end of the cushion levers 21 a and 21 b is an end of the piston rod 11. Is rotatably coupled to the shaft portion via a pin 22a, and the other end of the cushion lever 21 is rotated via a pin 22b at the positions of the parallel hand portions 15a and 15b corresponding to the rolling axis 20 of the steel ball row 19. It is freely combined.

Reference numeral 25 is a piston packing, and 26 is an O-ring.

Next, the operation of this embodiment will be described.

When the parallel hand parts 15a and 15b are opened and closed, air is supplied to the open port 10 and the air in the first cylinder chamber 5a is discharged, the piston rod 11 moves to the left side, and the cushion lever 21a. , 21b, the parallel hand parts 15a, 15b open in parallel with each other.

When air is supplied to the close port 9 and the air in the second cylinder chamber 5b is discharged, the piston rod 11 moves to the right and the parallel hand parts 15a and 15b are moved through the cushion levers 21a and 21b. Move in parallel with each other.

In such an opening / closing operation, in this embodiment, the force point F of the opening / closing driving force is provided at the position of the parallel hand portions 15a, 15b corresponding to the rolling axis 20 of the steel ball row 19, that is, the fulcrum. Since the structure is adopted, a rotating torque is not generated in the parallel hand portions 15a and 15b by the opening / closing driving force, and an unreasonable force is not applied to the steel ball row 19.

Therefore, wear of the steel ball row 19 can be reduced, durability and opening / closing accuracy can be improved, and the life of the steel ball row 19 can be extended.

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 the above-described embodiment, the case where the steel ball row is arranged between the guide groove formed on the sliding surface of the cover and the guide groove formed on the sliding surface of the parallel hand portion is described. Although it has been clarified, the present invention is not limited to this, and a roller row can be arranged between the guide grooves as a rolling portion row.

Further, in the above embodiment, the case where the reciprocating movement of the piston rod is converted into the opening / closing movement of the parallel hand portion via the cushion lever has been described, but the present invention is not limited to this, and the tapered cam hole and the cam roller are provided. It can also be applied to the case where the reciprocating movement of the piston rod is converted into the opening / closing movement of the parallel hand portion through the cam engagement with and.

Further, in the above-described embodiment, the case where the force point of the opening / closing driving force is provided at the position of the parallel hand portion corresponding to the rolling axis of the steel ball row has been described, but the invention is not limited to this. It is also possible to provide a force point for the opening / closing drive force in the vicinity of the position of the parallel hand part corresponding to the rolling axis of the.

In the above embodiment, the case where the steel ball row is arranged between the guide groove formed on the sliding surface of the cover and the guide groove formed on the sliding surface of the parallel hand portion will be described. However, the invention is not limited to this, and it is also possible to arrange steel wires in both guide grooves and arrange a steel ball row between these steel wires.

In the above description, the invention mainly made by the present inventor has been described with reference to a parallel hand device that operates by air pressure, which is the field of use of the invention. However, the invention is not limited to this, and a parallel hand device that operates by hydraulic pressure can be used. Can also be applied.

[0035]

[Effect of the device]

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

(1). Since the force point of the opening / closing driving force is provided at or near the position of the parallel hand part corresponding to the rolling axis of the rolling part row, the rotating torque is applied to the parallel hand part. It does not occur and no excessive force is applied to the rolling element row.

(2) Due to the effect of the above (1), it is possible to reduce the wear of the rolling part row, improve the durability and opening / closing accuracy, and extend the life of the rolling part row.

[Brief description of drawings]

FIG. 1 is a sectional view showing a parallel hand device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 1 Pneumatic Cylinder 2 Cylinder Body 3 Rod Hole 4 Packing Storage Chamber 5 Cylinder Chamber 5a 1st Cylinder Chamber 5b 2nd Cylinder Chamber 6 End Cover 7 Retaining Ring 8 Piston 9 Close Port 10 Opn Port 11 Piston Rod 12 Rod Packing 13a Connection Part 13b Coupling part 14a Cover 14b Cover 15a Parallel hand part 15b Parallel hand part 16 Screw hole 17a Sliding surface 17b Sliding surface 18a Guide groove 18b Guide groove 19 Steel ball row (rolling part row) 20 Rolling shaft core 21a Cushion lever 21b Cushion lever 22a Pin 22b Pin 23 Through hole 24 Overpressure adjusting bolt 25 Piston packing 26 O-ring 27a Stopper 27b Stopper F Force point

Claims (1)

[Scope of utility model registration request] 1. A rolling element row which is disposed between a sliding surface of a cover and a sliding surface of a parallel hand portion and which guides a pair of parallel hand portions in an opening / closing direction while facing each other in parallel, A parallel hand device comprising a fluid pressure cylinder part for opening and closing the parallel hand part, wherein the opening and closing driving force is provided at or near a position of the parallel hand part corresponding to the rolling axis of the rolling part row. A parallel hand device characterized in that the power point of is provided.