JP7093997B2 - Anti-rotation cylinder device - Google Patents

Description

The present invention relates to an anti-rotation cylinder device.

As this type of cylinder device, for example, a main body having an inner hole, a clamp rotation position having an engaging portion at the tip and rotating at a predetermined angle around the central axis, and a clamp rotation position where the engaging portion faces the clamped portion and a clamped portion. A clamp rod provided so as to be changed to an unclamp rotation position facing the space away from the portion and whose base end portion is located in the inner hole of the main body, and a clamp rod provided coaxially with the clamp rod or the above An intermediate member having a rotation stop means for one of the main bodies and being rotatable with respect to the other and movable in the direction of the axis, and the intermediate member and the main body or the clamp rod can be rotated. A screw connection that is screw-coupled to a certain side and is screwed with a screw portion with a large lead so that it rotates with axial thrust, and the relative axial displacement amount of both is regulated to correspond to the rotation of the predetermined angle. An acting force applying means provided so as to apply an axial acting force for changing the axial relative position to the portion, the rotatable side and the intermediate member, and a clamp rod at the clamp rotating position are fluidized. A clamping device including a clamping force generating means provided so as to move to the proximal end side by pressure to cause a clamping action has been proposed (see Patent Document 1).

In addition, the rotation prevention cylinder prevents the rotational movement of the rod when the piston of the fluid pressure cylinder and the rod reciprocate, with high accuracy and at low cost, and the guide rod penetrating the piston is a member at both ends of the cylinder tube. It has also been proposed to install the piston in the water along the guide rod (see Patent Document 2).

Japanese Unexamined Patent Publication No. 01-210131 Japanese Unexamined Patent Publication No. 2005-54977

In the conventional rotation prevention cylinder device, since the rotation stopping means is provided inside the cylinder, there is a problem that the structure becomes complicated, the rigidity is insufficient, and the rotation positioning accuracy is insufficient.
Therefore, it is an object of the present invention to simplify the structure of the rotation stopper means and to increase the rigidity.

In order to achieve the above object, the present invention has taken the following measures. That is, the anti-rotation cylinder device of the present invention has a cylinder portion, an output shaft provided on the cylinder portion so as to be movable in the axial direction, and an upper portion protruding outward, and the output shaft is to be moved in the axial direction. A moving portion provided in the cylinder portion and a restraining portion for restraining the relative rotation between the moving portion and the cylinder portion are provided, and the restraining portion is a restricting member fixed to the outside of the lower portion of the cylinder portion. A projecting member provided at the axial center of the moving portion and projecting to the regulating member, and an engaging portion in which the projecting member and the restricting member engage with each other to restrain the rotation of the projecting member. The cylinder portion is provided with a rotating portion that rotates the output shaft by relative movement in the axial direction between the moving portion and the output shaft, and the output shaft is a clamp rod that clamps an object. There is an imparting portion provided in the cylinder portion to apply a clamping force to the clamp rod, and the restricting member is provided with a detection device for detecting the moving position of the protruding member, and the detection device can be used. The restricting member including the regulating member prevents the relative rotation of the moving portion and the cylinder portion, which is sealed by the cover member.

In addition, the word indicating the direction such as "upper part, lower part" in the present invention is a word indicating one end and the other end in the axial direction, and does not limit the position (place). For convenience, the terms "upper" and "lower" are not limited to those used in the vertical direction, but include those used in the horizontal horizontal direction and the like.

The engaging portion includes an engaging concave portion provided along the axial direction on either one of the restricting member or the protruding member, and an engaging convex portion provided on the other and engaging with the engaging concave portion. It is preferable to have it.

It is preferable that the engaging recess is a guide groove provided in the regulating member, and the engaging protrusion is a guide pin provided in the protruding member and engaged with the guide groove.

The detection device is preferably a position detection switch that detects the engaging protrusion .

According to the present invention, since the restraint portion which is the rotation stopping means is provided outside the cylinder portion, the structure is simplified and the rigidity is improved as compared with the one provided inside the conventional cylinder portion. be able to.

It is a schematic diagram which shows the embodiment of this invention. It is a schematic diagram which shows the other embodiment of this invention. It is a top view which shows the specific structure of the embodiment shown in FIG. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a drawing of the restraint part in the BB line cross section of FIG. FIG. 5 is a cross-sectional view taken along the line CC of FIG. The operation explanatory diagram shows the rise of the clamp rod by the moving part. The operation explanatory diagram shows the rotation of the clamp rod by the rotating portion. The operation explanatory diagram shows the clamp state of the clamp rod by the imparting portion. It is sectional drawing of the main part which shows the other embodiment of this invention. FIG. 10 is a sectional view taken along line DD of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, the rotation prevention cylinder device has a cylinder portion 1. The cylinder portion 1 has an output shaft 2 that is provided so as to be movable in the axial direction and whose upper portion protrudes outward. A moving portion 3 is provided in the cylinder portion 1 so as to move the output shaft 2 in the axial direction. A restraint portion 4 for restraining the relative rotation between the moving portion 3 and the cylinder portion 1 is provided.

The restraint portion 4 is provided outside the cylinder portion 1. The restraining portion 4 includes a regulating member 5 fixed to the lower portion of the cylinder portion 1, a protruding member 6 provided at the axial center portion of the moving portion 3 and projecting to the regulating member 5, the protruding member 6 and the above. It has an engaging portion 7 with which the regulating member 5 engages and restrains the rotation of the protruding member 6.

The output shaft 2, the moving portion 3, and the projecting member 6 are said to be relatively non-rotatable. As a result, the output shaft 2 is made non-rotatable relative to the cylinder portion 1.

The regulating member 5 is provided with a detection device 8 for detecting the moving position of the protruding member 6.
Specifically, the output shaft 2 is a piston rod, and the moving portion 3 is a piston.
The projecting member 6 is composed of a member that penetrates the lower end wall of the cylinder portion 1 from the axial center portion of the piston and projects outward from the cylinder portion 1. The protruding member 6 is made of a large-diameter columnar body.
The regulating member 5 is provided with a hole in the center thereof into which the protruding member 6 is inserted.

The engaging portion 7 has an engaging recess 7a provided along the axial direction in either the regulating member 5 or the protruding member 6, and an engaging convex portion provided in the other and engaging with the engaging recess 7a. It is provided with a portion 7b.

In this embodiment, the engaging recess 7a is composed of a pair of left and right guide grooves provided on the side wall of the regulating member 5 along the axial direction. The engaging convex portion 7b is composed of a guide pin provided at the lower end of the projecting member 6. The guide pins projecting from the left and right side surfaces of the projecting member 6 are slidably engaged with the guide groove, and the rotation of the projecting member 6 is restrained.
The engaging concave portion 7a and the engaging convex portion 7b are not limited to a pair on the left and right, and may be on only one side.
With such a configuration, the rigidity of the restraint portion 4 is ensured and the structure is simplified.

The detection device 8 has a protrusion position detection switch 8a and a retracted position detection switch 8b that detect the protruding position and the retracted position of the output shaft 2 by detecting the moving position of the engaging convex portion 7b (guide pin) of the protruding member 6. Have. The position detection switches 8a and 8b are proximity switches, limit switches and the like.

What is shown in FIG. 2 is another embodiment of the present invention.
In the above embodiment, the output shaft 2 and the moving portion 3 are relatively non-rotatable, but in this embodiment, the output shaft 2 and the moving portion 3 are coupled via the rotating portion 9. The point is different.

The rotating unit 9 rotates the output shaft 2 by relative movement of the output shaft 2 and the moving unit 3 in the axial direction. In order to rotate the output shaft 2, it is necessary to restrain the rotation of the moving portion 3.

The output shaft 2 is a clamp rod. The clamp rod 2 is provided on the cylinder portion 1 so as to be movable in the axial direction and rotatably around the axial center, and the upper portion protrudes outward to clamp the object. At the upper end of the clamp rod 2, a convex portion 2a projecting laterally for clamping is formed. In the cylinder portion 1, an imparting portion 10 for applying a clamping force to the clamp rod 2 is provided.

Since the restraint portion 4 and the detection device 8 are the same as those of the embodiment shown in FIG. 1, the description thereof will be omitted.

3 and 4 show a specific configuration of the cylinder device shown in FIG. 2. The restraint portion 4 and the detection device 8 are covered with a cover member 11 to prevent dust.

The cylinder portion 1 has an upper first cylinder 12 and a lower second cylinder 13. The first cylinder 12 is provided with the imparting portion 10. The moving portion 3 is provided on the second cylinder 13.

The giving portion 10 has a first piston 14 provided in the first cylinder 12. A clamp rod 2 is slidably inserted into the center of the first piston 14. The clamp rod 2 is provided with an accompanying portion 15 that engages with the first piston 14 and accompanies in the clamping direction. The granting portion 10 is composed of the first piston 14 and the accompanying portion 15 (see FIG. 8).

The accompanying portion 15 is composed of a ring body screwed to the lower side of the clamp rod 2. The accompanying portion 15 is not limited to the ring body, and may be any as long as it protrudes from the clamp rod 2 and engages with the first piston 14.

The applying portion 10 lowers the first piston 14 and engages with the accompanying portion 15 to lower the clamp rod 2 to apply a clamping force to the clamp rod 2 (see FIG. 9).

A bearing 16 is provided on the ring body of the accompanying portion 15. A stopper portion 17 that engages with the bearing 16 is provided at the lower portion of the first cylinder 12. The upper limit of the clamp rod 2 is restricted by the contact of the outer ring of the bearing 16 with the stopper portion 17 (see FIG. 7).

The first cylinder 12 is a hydraulic cylinder, and an oil chamber for applying a clamping force is provided on the upper surface side of the first piston 14. A clamp hydraulic port 18 for supplying hydraulic oil to the oil chamber is provided on the side wall portion of the first cylinder 12.

The moving portion 3 has a second piston 19 provided in the second cylinder 13.
The second cylinder 13 is an air cylinder, and an ascending airport 20 for ascending and turning the clamp rod 2 by applying air pressure to the lower surface of the second piston 19 is provided on the lower side wall of the cylinder portion 1. A descending airport 21 for turning and lowering the clamp rod 2 by applying air pressure to the upper surface of the second piston 19 is provided on the upper side wall of the cylinder portion 1.

The rotating portion 9 that rotates the clamp rod 2 by relative movement in the axial direction between the moving portion 3 and the clamp rod 2 has a camshaft 22 that projects upward from the center of the second piston 19. The camshaft 22 and the lower end of the clamp rod 2 are fitted so as to be relatively movable in the axial direction. The camshaft 22 is inserted into the hole 2b opened at the center of the lower end of the clamp rod 2 so as to be movable in the axial direction.

This fitting portion constitutes the rotating portion 9 provided over the clamp rod 2 and the moving portion 3. The rotating portion 9 may be configured such that the clamp rod 2 is inserted into a hole provided on the moving portion 3 side.

The rotating portion 9 has an acting portion 23 that causes the clamp rod 2 and the moving portion 3 to move relative to each other, and a cam mechanism portion 24 that rotates the clamp rod 2.

The acting portion 23 has an elastic member 25 provided between the clamp rod 2 and the moving portion 3. The elastic member 25 is composed of a compression coil spring. The upper end of the coil spring is in contact with the lower surface of the ring body of the accompanying portion 15 provided on the clamp rod 2, and the lower end thereof is in contact with the upper surface of the second piston 19.

The cam mechanism portion 24 has a cam groove 26 provided on the cam shaft 22 and a cam pin 27 provided on the clamp rod 2 so as to engage with the cam groove 26. The clamp rod 2 is configured to rotate 90 degrees by moving the cam pin 27 through the cam groove 26. In order to rotate the clamp rod 2, it is necessary to restrain the rotation of the camshaft 22 which is the moving portion 3, and the rotation of the moving portion 3 is restrained by the restraining portion 4.

The clamp rod 2 and the moving portion 3 are urged in the direction of separation by the working portion 23, but the cam pin 27 is engaged with the cam groove 26 to prevent the clamp rod 2 and the moving portion 3 from being separated from each other.

The cam mechanism portion 24 may have a cam groove provided in either one of the moving portion 3 and the clamp rod 2 and a cam pin provided in the other and engaged with the cam groove. Further, in this embodiment, the camshaft 22 and the second piston 19 are composed of separate members, but they may be integrally configured.

5 and 6 are detailed views of the restraint portion 4.
The restraint portion 4 has a regulating member 5 fixed to the lower portion of the cylinder portion 1. The restraint portion 4 has a projecting member 6 provided in the moving portion 3 and projecting to the regulating member 5. The restraining portion 4 has an engaging portion 7 in which the protruding member 6 and the restricting member 5 engage with each other to restrain the rotation of the protruding member 6.

The projecting member 6 is composed of a member that penetrates the lower end wall of the cylinder portion 1 from the cam shaft 22 and projects outward from the cylinder portion 1. The protruding member 6 is made of a large-diameter columnar body.

In this embodiment, the projecting member 6 is configured as a separate member from the second piston 19, but may be integrally configured.

The regulating member 5 is a quadrangular prism, and a hole into which the protruding member 6 is inserted is provided in the center thereof. A pair of left and right guide grooves, which are engaging recesses 7a along the axial direction, are provided on the side wall of the regulating member 5. A guide pin, which is an engaging convex portion 7b whose both ends engage with the guide groove 7a, is provided at the lower end portion of the projecting member 6. The engaging portion 7 is configured by the guide groove 7a and the guide pin 7b.
With such a configuration, the rigidity of the restraint portion 4 is ensured and the structure is simplified.

The engaging portion 7 engages with an engaging recess 7a provided in either one of the regulating member 5 or the protruding member 6 along the axial direction and the engaging recess 7a provided in the other. It suffices to have a go-convex portion 7b, and is not limited to the guide groove and the guide pin.

The regulating member 5 is provided with a detection device 8 for detecting the position of the clamp rod 2. The detection device 8 has a clamp position detection switch 8a for detecting the clamp position of the clamp rod 2 and a retracted position detecting switch 8b for detecting the retracted position.

One end of the guide pin 7b projecting from the projecting member 6 projects outward from the guide groove 7a. The clamp position detection switch 8a and the retracted position detection switch 8b are attached to the outer surface of the regulating member 5 so as to detect the protruding portion of the guide pin 7b.

The clamp position detection switch 8a and the retracted position detection switch 8b may be a proximity switch, a limit switch, or the like.

The regulation member 5 including the detection device 8 is covered with a cover member 11 to prevent dust. The cover member 11 is provided with a connector for electrical wiring of the detection device 8 and has a watertight structure.
The detection device 8 is sealed with a cover member 11 to prevent adhesion of a lubricant or metal powder.

7 to 9 are operation explanatory views of the cylinder device.
The operation from the unclamped state (retracted state) shown in FIG. 4 to the clamped state of FIGS. 7 to 9 will be described.

First, in FIG. 4, pressurized air is supplied from the descending airport 21, the second piston 19 which is the moving portion 3 descends, and the clamp rod 2 descends along with the second piston 19. The retracted position detection switch 8b detects the position of the guide pin 7a (see FIGS. 5 and 6). The clamp rod 2 and the moving portion 3 are urged in the direction of separation by the elastic member 25 of the acting portion 23 of the rotating portion 9, and the cam pin 27 is engaged with the upper end of the cam groove 26 in the cam mechanism portion 24 of the rotating portion 9. The position of the convex portion 2a at the upper end of the clamp rod 2 is the position shown in FIG.

In FIG. 7, pressurized air is supplied to the ascending airport 20 and air is discharged from the descending airport 21, so that the second piston 19 which is the moving portion 3 rises, and the clamp rod 2 also rises along with this. do. The bearing 16 provided in the accompanying portion 15 of the clamp rod 2 comes into contact with the stopper portion 17, and the ascending of the clamp rod 2 is stopped.

As shown in FIG. 8, by further supplying pressurized air to the rising airport 20, the second piston 19 which is the moving portion 3 resists the urging force of the elastic member 25 of the acting portion 23 of the rotating portion 9. And rise. In the cam mechanism portion 24 of the rotating portion 9, relative movement between the cam pin 27 and the cam groove 26 occurs, the clamp rod 2 rotates 90 degrees, and the direction of the convex portion 2a at the upper end of the clamp rod 2 is the position shown in FIG. Will be.

When the cam pin 27 and the cam groove 26 move relative to each other, the rotation of the moving portion 3 is restricted by the restraining portion 4, so that the clamp rod 2 side rotates 90 degrees.

As shown in FIG. 9, pressure oil is supplied from the clamp hydraulic port 18, the first piston 14 which is the applying portion 10 descends, the first piston 14 comes into contact with the ring body of the accompanying portion 15, and the clamp rod 2 To clamp the object.
The clamp position detection switch 8a of the detection device 8 is configured to detect the position of the clamp rod 2.

Since the pressurized air is supplied to the rising airport 20 in this state, the rotating portion 9 maintains the same state as in FIG. 8, and the clamp rod 2 does not rotate.

Since the restraint portion 4 is provided outside the cylinder portion 1, the sealing structure of the cylinder chamber becomes simpler than that provided inside the cylinder portion 1.

10 and 11 are other embodiments of the present invention.
The detection device 8 is different from the embodiment, and other configurations are the same as those of the embodiment.

A dog 28 is provided at the lower end of the projecting member 6. The dog 28 is configured to be detected by the position detection switches 8a and 8b.

The embodiments disclosed this time are exemplary in all respects and are not restrictive.
The scope of the present invention is shown by the scope of claims, not the above description, and includes all modifications within the meaning and scope equivalent to the scope of claims.

1 Cylinder 2 Output shaft (clamp rod)
3 Moving part 4 Restraining part 5 Restricting member 6 Protruding member 7 Engaging part 8 Detection device 9 Rotating part 10 Applying part 11 Cover member 12 1st cylinder 13 2nd cylinder 14 1st piston 15 Accompanying part 16 Bearing 17 Stopper part 18 Clamp hydraulic port 19 2nd piston 20 rising airport 21 falling airport 22 camshaft 23 working part 24 cam mechanism part 25 elastic member 26 cam groove 27 campin 28 dog

Claims (4)

A cylinder portion, an output shaft provided in the cylinder portion so as to be movable in the axial direction and having an upper portion protruding outward, and a moving portion provided in the cylinder portion so as to move the output shaft in the axial direction. A restraining portion for restraining the relative rotation between the moving portion and the cylinder portion is provided.
The restraining portion is engaged with a regulating member fixed to the outside of the lower portion of the cylinder portion, a protruding member provided at the axial center portion of the moving portion and projecting to the regulating member, and the protruding member and the regulating member. In addition, it has an engaging portion that restrains the rotation of the protruding member, and has an engaging portion.
The cylinder portion has a rotating portion that rotates the output shaft by relative movement in the axial direction between the moving portion and the output shaft.
The output shaft is a clamp rod that clamps an object, and has an imparting portion provided in the cylinder portion to apply a clamping force to the clamp rod.
The regulating member is provided with a detection device that detects the moving position of the protruding member.
The regulatory member including the detection device is sealed by a cover member.
An anti-rotation cylinder device that prevents relative rotation between the moving portion and the cylinder portion . The engaging portion includes an engaging concave portion provided along the axial direction on either one of the restricting member or the protruding member, and an engaging convex portion provided on the other and engaging with the engaging concave portion. The anti-rotation cylinder device according to claim 1. The rotation prevention according to claim 2, wherein the engaging concave portion is a guide groove provided in the restricting member, and the engaging convex portion is a guide pin provided in the protruding member and engaged with the guide groove. Cylinder device. The rotation prevention cylinder device according to claim 3 , wherein the detection device is a position detection switch that detects the engaging protrusion .

Images