JPH0732243U - Cylinder device - Google Patents

Abstract

(57) [Abstract] [Purpose] Firstly, regardless of the pressing force or the pulling force, the same uniform and uniform spring force and elastic force can be obtained, and the rod can be reliably placed in the neutral position after the fact. Secondly, we propose a cylinder device that is compact and saves space and space while returning to its original condition. [Structure] Normally, a spring 18 which is externally mounted on the rod 6 in the case 1 is mounted on the rod 6 via a first receiving seat 16.
The first stopper 8 and the case inner flange portion 3 as well as the rod head 7 and the second stopper 10 of the case 1 through the second receiving seat 17. And
When pressing force in the direction of the base end 4 is applied to the rod 6,
When the spring 18 is compressed by the first receiving seat 16 and the tensile force in the direction of the tip 5 is applied to the rod 6, the spring 18 is compressed by the second receiving seat 17 and the original state is restored after the fact. The elastic force for is to come.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cylinder device. That is, the present invention relates to a cylinder device that surely returns to the original state regardless of the tensile force or the pressing force.

[0002]

[Prior art]

 FIG. 3 is a front explanatory view of this type of conventional example. As shown in the figure, for example, the lever B, which is swingably held by the pin A, is pressed against the pulling force or pulling force regardless of the pulling force or pulling force which is an external force to the pushing side. Except for the above, after the fact, as a structure to return to the original neutral position, the structure with two springs C has been adopted conventionally. That is, for example, with respect to the base end of the upright lever B, the springs C are stretched in opposite directions along the swinging direction, and the other ends of the springs C are fixed to the immovable portions.

[0003]

[Problems to be solved by the device]

 By the way, in such a conventional example, the following problems have been pointed out. First of all, both springs C used in such a structure are always set to the same and common spring force, that is, tensile force, compression force, and elastic force, and in order to maintain this, strict force is applied even after the fact. There was a problem that adjustment such as tension was required. It has been pointed out that if the spring forces of both springs C are slightly varied, the lever B may not return to the original neutral position accurately and may be displaced, making it difficult to restore the original state. Second, since two springs C were stretched in the opposite direction between the immovable part and the fixed part, there was a problem in terms of space and space.

In view of the above situation, the present invention has been made to solve the problems of the above-mentioned conventional example, and the spring mounted on the rod inside the case always receives the first receiving member. The rod is in contact with the first stopper of the rod and the inner flange of the case, and the second receiving seat is in contact with the rod head and the second stopper of the case. Since the spring is compressed by the first receiving seat and the second receiving seat to generate an elastic force for returning to the original state after the fact, firstly, regardless of the pressing force or the pulling force, it is easy. The second purpose of the present invention is to propose a cylinder device that can easily obtain the same spring force and elastic force, reliably return to the original state, and secondly can be made compact without taking up space.

[0005]

[Means for Solving the Problems]

 The technical means of the present invention for achieving this object are as follows. That is, this cylinder device has a cylindrical case, a case inner flange portion fixed to the front end side of the case, a base end side coaxially arranged in the case, and a front end side outside the case. Fixed to the base end side inner surface of the case, a linear rod protruding inward, a large-diameter rod head fixed to the base end of the rod, a first stopper fixed to the center of the rod. A second stopper, the rod is loosely inserted, and the first stopper seat of the rod and the case inner flange portion are abutted from the inside, and the base end of the rod is loosely inserted. It has a second stopper of the case and a second receiving seat that comes into contact with the rod head from the inside, and a spring that is mounted on the rod and is interposed between the first receiving seat and the second receiving seat. It becomes. Then, when a pressing force is applied to the rod in the proximal direction, the spring is compressed by the first receiving seat to generate an elastic force for returning to the original state after the fact. When a tensile force is applied to the tip of the spring, the spring is compressed by the second receiving seat, and an elastic force for returning to the original state after the fact is generated.

[0006]

[Action]

 Since the cylinder device of the present invention comprises such means, it operates as follows. Normally, the spring mounted on the rod inside the case contacts the first stopper of the rod and the flange portion inside the case via the first receiving seat, and the second receiving seat through the first head of the rod and the first head of the case. 2 It is in contact with the stopper. In this way, the spring is set to a predetermined initial value of spring force and elastic force, and the rod is in a predetermined neutral position.

Next, when an external force is applied to the rod, the rod moves in the proximal direction from the neutral position, and the spring causes the first stopper, the first receiving seat, and the second receiving seat of the rod to move. ， It is compressed between the case and the second stopper, and elastic force is generated to restore the original condition after the fact. Also, when an external tensile force is applied to the rod, the rod moves from the neutral position to the tip direction, and the spring causes the rod head, the second receiving seat, the first receiving seat, and the inner flange of the case to move. It is compressed between the two and elastic force is generated to restore the original condition after the fact. After that, when the external pressing force or tensile force is removed, the elastic force of this spring causes each component to return to its normal state, and the rod also returns to its original neutral position.

Therefore, firstly, since the rod is returned to the original state by one spring in this way, the same and uniform spring force can be easily and easily applied regardless of the pressing force and the pulling force which are external forces. Resilient force is obtained and the rod is reliably returned to its neutral position. Secondly, one spring is compressed in the case, and the elastic force for restoring the original state is obtained, so it does not take up space or space.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings. 1 is a vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view for explaining the operation of the same embodiment, and FIG. 2 (1) shows the case where a pressing force is applied. (2) The figure shows the case where tensile force is applied.

This cylinder device will be described with reference to FIG. 1 first. In this cylinder device, first, a case 1 having a cylindrical shape, a case inner flange portion 3 fixed to a tip 2 side of the case 1, and a base end 4 side are a case. 1, a linear rod 6 that is coaxially arranged inside and has a tip 5 side protruding outside the case 1, a large-diameter rod head 7 fixed to the base end 4 of the rod 6, and the inside of the rod 6. It has a first stopper 8 fixed to the central part and a second stopper 10 fixed to the inner surface of the case 1 on the base end 9 side.

To describe these in detail, the case 1 has a cylindrical shape in which the tip 2 and the base end 9 are open, and is fixed to the immovable portion 11. However, an appropriate slit (shown in the figure) is provided between the tip 2 and the base end 9. Often) is formed. The case inner flange portion 3 is projectingly fixed to the inner surface of the tip 2 of the case 1 in an inner flange shape and fixed to the case 1 by welding or the like in the illustrated example. It may be integrally formed, or may be screwed to the case 1 and locked with a rotation stop bolt. The second stopper 10 is projectingly fixed to the inner surface of the case 1 on the base end 9 side, and in the illustrated example, is screwed to a screw portion 12 formed on the inner surface of the case 1 on the base end 9 side and fixed to the rotation stop bolt 13. Although a stopper nut that is locked by the like is used, an inner flange-like member that is fixed to the case 1 by welding or the like may be used instead of the illustrated example, and is integrally molded with the case 1. You may do it. In any case, inside the second stopper 10, there is a hollow portion H having a diameter larger than that of the rod head 7 described later and smaller than those of the first receiving seat 16 and the second receiving seat 17. Has been formed.

Next, in the illustrated example, the rod 6 is in the form of a straight line in which each of the portions having a slightly larger diameter on the proximal end 4 side and a slightly smaller diameter on the distal end 5 side is integrally connected into one piece, and has a large diameter. The end 4 side is coaxially arranged in the case 1, and the tip 5 side having a small diameter projects outside the case 1 and is screwed and connected to another member (not shown) by the formed screw portion 14. ing. The rod head 7 fixed to the base end 4 of the rod 6 has a diameter larger than that of the base end 4 of the rod 6, and is fixed to the base end 4 of the rod 6 by welding, screwing, integral molding or the like. . The first stopper 8 fixed to the central portion of the rod 6 is set to have a diameter as large as that of the rod head 7, and in the illustrated example, a nut screwed to the screw portion 15 formed in the central portion of the rod 6 However, the rod 6 may be fixed to the central portion of the rod 6 by welding, integral molding, or the like, instead of the illustrated example.

Further, in this cylinder device, the rod 6 is loosely inserted and the first receiving seat 16 abutted against the first stopper 8 of the rod 6 and the case inner flange portion 3 from the inside, and the base end of the rod 6. 4 is loosely inserted, and the second receiving seat 17 is in contact with the second stopper 10 of the case 1 and the rod head 7 from inside, and the first receiving seat 16 and the second receiving seat 17 are externally mounted on the rod 6. And a spring 18 interposed therebetween.

To explain these in detail, the first receiving seat 16 of the spring 18 has a thick disk shape that is slidably guided by the inner surface of the case 1, and has a hole 19 on the center side. Is formed, and the central portion and the like of the rod 6 is loosely inserted in the hole 19. The first receiving seat 16 is in contact with the first stopper 8 fixed to the rod 6 from the inner side on the outer periphery of the hole 19, and the in-case flange fixed to the case 1 on the outer peripheral side. The portion 3 is abutted from the inside. Next, like the first receiving seat 16, the second receiving seat 17 of the spring 18 has a thick circular plate shape that is slidably guided by the inner surface of the case 1, and is formed on the center side. A hole 20 is formed, and the base end 4 of the rod 6 is loosely inserted in the hole 20. The second receiving seat 17 abuts the rod head 7 of the rod 6 from the inside on the outer periphery of the hole 20, and the second stopper 10 fixed to the case 1 on the outer periphery from the inside. Abutted. The spring 18 is composed of a compression spring which is mounted on the rod 6 and is interposed between the first receiving seat 16 and the second receiving seat 17.

The respective constituent members of this cylinder device are always in such a state. On the other hand, when a pressing force is applied to the rod 6 in the direction of the base end 4, the spring 18 is compressed by the first receiving seat 16 to generate an elastic force for returning to the original state after the fact. Further, when a tensile force is applied to the rod 6 in the direction of the tip 5, the spring 18 is compressed by the second receiving seat 17 to generate an elastic force for returning to the original state after the fact. .

In the cylinder device of the illustrated example, the first stopper 8 is a nut screwed to the screw portion 15 of the rod 6, and the second stopper 10 is also a screw of the case 1. A stopper nut is used which is screwed into the portion 12 and locked by the detent bolt 13. When assembling as a device, first, the second receiving seat 17, the spring 18, the first receiving seat 16 and the like are externally attached to the rod 6 in this order from the side of the rod head 7, and then the first stopper 8 serving as a nut. Is screwed onto the screw portion 15, and the initial values of the spring force and the elastic force of the spring 18 are set by adjusting the screwing degree and the tightening degree (of course, the initial values are the spring force and the elastic force). Force 0 is also included). Next, in the illustrated example, after the initial value is set for the spring 18 thus exteriorized, the rod 6 is inserted and incorporated into the case 1, and the second stopper 10, which is a stopper nut, is inserted into the case 1. The threaded portion 12 is tightened and screwed until it comes into contact with the second receiving seat 17. After the screwing degree and tightening degree of the second stopper 10 are adjusted in this way, the second stopper 10 is locked and fixed to the case 1 by the rotation stop bolt 13.

In the cylinder device of the illustrated example, as described above, the initial values of the spring force and the elastic force of the spring 18 can be appropriately set when the device is assembled. However, the cylinder device of the present invention is not limited to such an illustrated example, and it is of course possible to fix the spring force and elastic force of the spring 18 to a constant value from the beginning. That is, as described above, a cylinder device in which the first stopper 8 is fixed to the rod 6 by welding, integral molding or the like, and the second stopper 10 is also fixed to the case 1 by welding, integral molding or the like is also conceivable. .

The cylinder device according to the present invention is configured as described above. Then it becomes as follows. First, the following is a description of the conditions in which the rod 6 is not subject to any external pressing force or tensile force. That is, in this case, as shown in FIG. 1, the spring 18 which is externally mounted on the rod 6 in the case 1 has the first stopper seat 16 of the rod 6 via the first receiving seat 16 on the tip 5 side of the central portion. 8 and the inner flange portion 3 of the case, and also contacts the rod head 7 and the second stopper 10 of the case 1 via the second receiving seat 17 on the base end 4 side. In this cylinder device, the spring 18 is thus set to a predetermined initial value of spring force and elastic force, and the rod 6 is at a predetermined neutral position.

Next, when a pressing force or a tensile force, which is an external force, is applied to the rod 6, it is as follows. First, as shown in FIG. 2 (1), when the pressing force in the direction of the base end 4 is applied to the rod 6, the rod 6 moves from the neutral position to the direction of the base end 4, and The first receiving seat 16 is separated from the inner flange portion 3 of the case, and the spring 18 is provided between the first stopper 8 of the rod 6, the first receiving seat 16 and the second receiving seat 17, and the second stopper 10 of the case 1. , Is pressed and compressed. As a result, the spring 18 has an elastic force for returning to the original state after the fact. Further, as shown in FIG. 2 (2), when a tensile force is applied to the rod 6 in the direction of the tip 5, the rod 6 moves from the neutral position to the direction of the tip 5 and the second receiving member is moved. The seat 17 separates from the second stopper 10 of the case 1, and the spring 18 applies a tensile force between the rod head 7, the second receiving seat 17 and the first receiving seat 16, and the in-case flange portion 3. Received and compressed. As a result, the spring 18 has an elastic force for returning to the original state after the fact.

Therefore, in this cylinder device, in these cases, when the external pressing force or tensile force is removed, the elastic force for restoring the original state generated in the spring 18 causes the respective component members to The original state is restored to the normal state of FIG. 1 described above, and the rod 6 is also reliably returned to the original state in the original neutral position. That is, due to the elastic force of the spring 18, the spring 18 abuts the first stopper 8 of the rod 6 and the case inner flange portion 3 via the first receiving seat 16 on the tip 5 side of the central portion. At the same time, it contacts the rod head 7 and the second stopper 10 of the case 1 via the second receiving seat 17 on the base end 4 side. As a result, the spring 18 returns to a predetermined initial value of the spring force and elastic force, and the rod 6 also returns to its original state at a predetermined neutral position. Now then, with this cylinder device, the following first and second steps are taken.

First, the one spring 18 thus acts in the opposite direction, so that the rod 6 is returned to its original position. Therefore, regardless of the external pressing force or pulling force, the same spring force and resilience can always be obtained easily and easily. Therefore, according to this cylinder device, the rod 6 surely returns to its original state in the original neutral position.

Secondly, one spring 18 is mounted on the rod 6 in the case 1 and is compressed to obtain an elastic force, so that the rod 6 returns to its original neutral position. ing. Therefore, this cylinder device is relatively space-saving and compact.

[0023]

[Effect of device]

 As described above, in the cylinder device according to the present invention, the spring externally mounted on the rod in the case normally contacts the first stopper of the rod and the flange portion in the case via the first receiving seat. At the same time, it is in contact with the rod head and the second stopper of the case through the second receiving seat, and when a pressing force or a tensile force is applied to the rod, the spring is generated at the first receiving seat and the second receiving seat. The following effects are exhibited by being compressed and generating an elastic force for returning to the original state after the fact.

First, the same spring force and elastic force can be easily and easily obtained regardless of the pressing force and the pulling force, and the original state can be reliably restored. That is, since one spring is used in this cylinder device, like the above-mentioned conventional example using two springs, the same and common spring force, setting to elastic force, strict maintenance, With no need for adjustment, there is no fear of variations in spring force and elastic force, and the rod will surely return to its original neutral position after the fact.

Secondly, it can be made compact without taking up space. That is, in this cylinder device, unlike the above-described conventional example of this type, it is not necessary to extend two springs in opposite directions, and the space is saved accordingly, and the cylinder device is made compact. Thus, the effects of the present invention are remarkable and great, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a cylinder device according to the present invention.

FIG. 2 is a vertical sectional view for explaining the operation of the embodiment,
The figure (1) shows the case where a pressing force is applied, and the figure (2) shows the case where a tensile force is applied.

FIG. 3 is a front explanatory view of a conventional example of this kind.

[Explanation of symbols]

 1 Case 2 Tip 3 Case Inner Flange 4 Base End 5 Tip 6 Rod 7 Rod Head 8 First Stopper 9 Base End 10 Second Stopper 11 Immovable Part 12 Screw Part 13 Non-rotating Bolt 14 Screw Part 15 Screw Part 16 1st Receiving seat 17 Second receiving seat 18 Spring (this invention) 19 hole 20 hole A pin B lever C spring (conventional example) H Hollow part

Claims (1)

[Scope of utility model registration request] 1. A cylindrical case, a case inner flange portion fixed to the front end side of the case, and a linear shape in which the base end side is coaxially arranged inside the case and the front end side projects out of the case. Rod, a large-diameter rod head fixed to the base end of the rod, a first stopper fixed to the central portion of the rod, and a second stopper fixed to the inner surface of the case on the base end side. A first stopper seat on which the rod is loosely inserted and which abuts against a first stopper of the rod and an inner flange portion of the case from inside, and a proximal end of the rod is loosely inserted and a second stopper of the case; A second receiving seat abutting against the rod head from the inside, and a spring that is externally mounted on the rod and interposed between the first receiving seat and the second receiving seat. If a pressing force is applied in the proximal direction, the first support When the spring is compressed at the seat to generate an elastic force for returning to the original state after the fact, and when a tensile force is applied to the rod in the tip direction, the spring at the second receiving seat. The cylinder device is characterized in that when it is compressed, elastic force is generated to restore the original state after the fact.