TW201402975A - Cylinder apparatus - Google Patents

Abstract

A cylinder device is provided to improve operability of a lock releasing operation by reducing rotary torque required for the lock releasing operation. A cylinder device comprises a protrusion (81), a maximum length contact unit (115), lock units (95,100,105) and leading units (96,101,106,107,111,112). The protrusion is installed on a peripheral surface of a cylinder side member (79) and is extended in a diametric direction. The maximum length contact unit is installed on the peripheral surface of a rod (12) and is extended to the direction of the periphery which the protrusion touches when the rod is in a maximum protruding state. The lock unit is partially installed in the peripheral direction in order to face the maximum length contact unit in an axial direction. The lock unit touches the protrusion when the length of the lock unit is shortened and limits the rod not to move in a reduction direction. The leading unit is separated from the maximum length contact unit in the axial direction so that the protrusion is led to a position facing the lock unit among the peripheral directions of the maximum length contact unit when the rod is in a maximum protruding state.

Description

Pressure cylinder device

The present invention relates to a pressure cylinder device.

In the cylinder device, there is a device that automatically locks the movement of the rod in the insertion direction of the cylinder when the rod is protruded from the cylinder to the maximum limit (for example, refer to Patent Document 1).

(Patent Document 1) Japanese Patent Laid-Open No. 50-54775

In the above-described pressure cylinder device, as the lock releasing operation, it is necessary to resist the elastic pressure to press the rod, and there is a problem that the operability is poor.

Accordingly, an object of the present invention is to provide a cylinder device which can improve the operability of a lock release operation.

In order to achieve the above object, the structure of the cylinder device of the present invention has a projection which is provided on one of the circumferential surface of the cylinder side member or the circumferential surface of the rod side member and extends in the radial direction; a length staking portion provided on the other side of the circumferential surface of the cylinder-side member facing the circumferential surface on which the protrusion is provided or the circumferential surface of the rod-side member, and is oriented toward the maximum protrusion of the rod a state in which the protrusion abuts in a circumferential direction; and a locking portion partially disposed in a circumferential direction opposite to the axial length of the maximum length abutting portion, and the protrusion abuts when the length is reduced, and the restriction The rod is further moved toward the contraction direction; and the inducing portion is configured to guide the protrusion to a position opposing the lock portion in a circumferential direction of the maximum length abutting portion when the rod is in a maximum protruding state. The method is disposed in the axial direction separately from the aforementioned maximum length abutting portion.

According to the present invention, the operability of the lock release operation can be improved.

11‧‧‧pressure cylinder

12‧‧‧ rod (rod side member)

13‧‧‧Piston

14, 15‧‧‧ chamber

20‧‧‧body

21‧‧‧ bottom

22‧‧‧pressure cylinder body

23‧‧‧ openings

25‧‧‧ Main body

26‧‧‧Annual section

27, 28‧‧‧ inside protrusion

29‧‧‧Clock convex

31‧‧‧ screw components

32, 73‧‧‧ mounting bracket

33, 74‧‧‧ mounting holes

34, 75‧‧‧Installation board

35, 76‧‧‧ Keep the board

36, 50, 55, 60, 77‧‧‧ inserted through holes

38, 39‧ ‧ bearings

40‧‧‧ Nuts

45‧‧‧ rod guide

46‧‧‧Seal ring

47‧‧‧ retaining ring

51‧‧‧The Great Trails Department

52‧‧‧Intermediate diameter

53‧‧‧Little Trails Department

56‧‧‧Rigid components

57‧‧‧Flexible components

58‧‧‧ Groove

62, 82‧‧‧ fitting holes

63‧‧‧Configure recess

64‧‧‧Flow hole

68‧‧‧Spindle Department

69‧‧‧Fitting shaft

70‧‧‧Riveting

79‧‧‧Cylinder side members

80‧‧‧Card recess

81‧‧‧ Protrusion

82‧‧‧ inner week components

83‧‧ ‧ sales

85 to 89‧‧‧Extension

91‧‧‧flat

91a‧‧‧flat surface

92‧‧‧Release the recess (recess)

92a‧‧‧Remove the concave position

93‧‧‧Lock position recess

93a‧‧‧Locked position concave

95, 100, 105‧‧‧ Locking Department

95a, 100a, 105a‧‧‧ concave

96, 101, 106, 107, 111, 112‧‧

Inclined faces 96a, 101a, 106a, 107a, 111a, 135a, 136a‧‧

97a, 102a, 112a, 113a‧‧‧ surface of the overhanging portion 86

115‧‧‧Maximum length abutment

120‧‧‧Cam mechanism

121‧‧‧Location Confirmation Department

122, 123‧‧‧ mark

130, 131, 140‧‧‧ protruding parts

135, 136‧‧ ‧ inclined section

140a, 140b‧‧‧ Surface of the protrusion 140

240‧‧‧Dust cover

241‧‧‧Cylinder

242‧‧‧ Cover

243‧‧‧Dust cover body

244‧‧‧ Main body

245, 246‧‧‧ inside protrusion

247‧‧‧Snap convex

Fig. 1 is a front elevational view showing a part of a cylinder device according to a first embodiment of the present invention.

Fig. 2 is a partially enlarged front cross-sectional view showing the cylinder device according to the first embodiment of the present invention.

Fig. 3 is a development view showing an example of a locus of an overhanging portion and a projection of the cylinder device according to the first embodiment of the present invention.

Fig. 4 is a development view showing an example of a locus of an overhanging portion and a projection of the cylinder device according to the second embodiment of the present invention.

Fig. 5 is a development view showing an example of a locus of an overhanging portion and a projection of the cylinder device according to the third embodiment of the present invention.

Fig. 6 is a development view showing an example of a locus of an overhanging portion and a projection of the cylinder device according to the fourth embodiment of the present invention.

Fig. 7 is a partially enlarged front cross-sectional view showing the cylinder device according to the fifth embodiment of the present invention.

"First embodiment"

A first embodiment of the present invention will be described based on Figs. 1 to 3 .

Fig. 1 shows a cylinder device according to a first embodiment. The cylinder device is a damper, specifically, a gas stay (gas spring) in which a gas is used as a working fluid. The cylinder device has a cylindrical pressure cylinder 11 in which a gas (air or nitrogen) and a small amount of oil for lubrication are sealed; and a rod 12 whose one end is inserted into one end of the pressure cylinder 11; and a rod fixed to the rod 12 A piston 13 disposed at one end of the pressure cylinder 11 is provided. The piston 13 is slidably fitted in the pressure cylinder 11, and the piston 13 can be divided into the chamber 14 on the side of the rod 12 and opposite to the rod 12 in the cylinder 11. The two chambers of the chamber 15 on the bottom side.

The cylinder 11 has a cylinder body 22 having a substantially bottomed cylindrical shape, and the cylinder body 22 has a substantially cylindrical trunk portion 20 and is fixed to the trunk portion by closing one end (bottom side) thereof. The bottom 21 of 20. The cylinder body 22 is formed at a position opposite to the opening portion 23 of the bottom portion 21 of the trunk portion 20, and is formed by coaxially forming a coaxial ring having a smaller diameter than the body portion 25 of the other fixed diameter. The annular step portion 26 of the shape. Further, the cylinder main body 22 is formed on the side of the bottom portion 21 closer to the annular step portion 26, and the inner protruding portion of the annular portion having the coaxial main body portion 25 and the small diameter is formed by plastic working. 27, 28. Further, in the cylinder main body 22, a plurality of locking projections 29 projecting inward in the radial direction are formed at positions between the inner protruding portions 27 and 28 of the two portions. Further, each of the inner protruding portions 27 and 28 may be a projection of a plurality of portions in the circumferential direction, similarly to the locking convex portion 29.

The cylinder 11 has a screw member 31 that is fixed to the bottom portion 21 of the cylinder body 22 so as to protrude outward in the axial direction. The screw member 31 is rotatably attached to the mounting bracket 32. The mounting bracket 32 has a mounting plate portion 34 in which the mounting hole 33 is formed, and a holding plate portion 35 that rises perpendicularly from one end portion of the mounting plate portion 34, and the screw member 31 is formed in the holding plate portion 35. The insertion hole 36 is inserted. The bearing 38, the holding plate portion 35 of the mounting bracket 32, and the bearing 39 are sequentially disposed from the bottom portion 21 side of the cylinder main body 22 so that the screw member 31 is inserted, and the member is held by the bottom portion 21 The intervening manner causes the nut 40 to be screwed to the screw member 31. Mounting bracket 32, will be installed The plate mounting portion 34 is attached to the cylinder 11 while being disposed on the opposite side of the bottom portion 21 of the holding plate portion 35. Further, although the bearings 38 and 39 are illustrated as ball bearings, the mounting bracket 32 may be a sliding bearing such as a resin as long as the cylinder 32 can be rotated.

The cylinder 11 has a rod guide 45 disposed inside the opening portion 23 side of the cylinder main body 22, a seal ring 46, and a retaining ring 47, and the rod 12 is inserted into the cylinder 11 by this. Inside.

As shown in Fig. 2, the rod guide 45 is formed such that the insertion hole 50 along the axial direction is formed in an annular shape at the center. The insertion hole 50 is a sliding bearing. The outer diameter side of the rod guide 45 is formed into a cylindrical shape having a step in which a large diameter portion 51 having a largest diameter is formed at one end of the axial direction, and a smaller diameter is formed in the middle of the axial direction than the large diameter portion 51. The intermediate diameter portion 52 has a small diameter portion 53 that is smaller than the intermediate diameter portion 52 at the other end in the axial direction.

The seal ring 46 is configured such that the insertion hole 55 along the axial direction is formed in an annular shape at the center. The seal ring 46 is composed of a substantially cylindrical rigid member 56 and an elastic member 57 made of rubber which is formed in an annular shape so as to cover the rigid member 56. The elastic member 57 is formed in a radial cross-sectional C-shape in which an annular groove portion 58 is formed on one end side in the axial direction. A rigid member 56 is embedded in the outer diameter side of the groove portion 58 of the elastic member 57.

The retaining ring 47 is configured such that the insertion hole 60 in the axial direction is formed in an annular shape at the center. The retaining ring 47 is disposed at a pressure so as to abut against the inner protruding portion 27 on the side of the opening portion 23 from the side of the opening portion 23 In the main body portion 25 of the cylinder main body 22, a seal ring 46 is disposed on the opening portion 23 side of the retaining ring 47 so that the groove portion 58 faces the retaining ring 47 side. Then, a rod guide 45 is disposed on the side of the opening portion 23 of the seal ring 46 with the large diameter portion 51 as the seal ring 46 side. The large diameter portion 51 of the rod guide 45 is locked to the annular step portion 26 of the cylinder body 22 from the opposite side of the axial seal ring 46, whereby the rod guide 45, the seal ring 46 and the retaining ring 47 are The inner protruding portion 27 and the annular step portion 26 can be sandwiched and attached to the cylinder body 22. Further, in the case where the seal ring 46 can be held on the protruding end side of the rod by the internal pressure, the retaining ring 47 is not required.

The piston 13 is formed such that the fitting hole 62 along the axial direction is formed in an annular shape at the center, and on one end side in the axial direction, a fitting recess recessed in the axial direction is formed so as to surround the fitting hole 62. 63. Further, a plurality of flow path holes 64 that are parallel to the fitting holes 62 are formed at the bottom surface of the recessed portion 63.

The rod 12 has a fixed diameter main shaft portion 68 and a fitting shaft portion 69 which is disposed on one end side of the main shaft portion 68 and has a smaller diameter than the main shaft portion 68; and the rivet portion 70 The fitting shaft portion 69 is plastically deformed on the side opposite to the main shaft portion 68 of the fitting shaft portion 69 to have a large diameter. The rod 12 is such that the fitting shaft portion 69 is fitted to the fitting hole 62 of the piston 13 from the side opposite to the arrangement recess 63, and the portion protruding from the piston 13 of the fitting shaft portion 69 in this state is accommodated in The manner in which the recess 63 is disposed is riveted and the rivet 70 is formed. The piston 13 is held by the swaging portion 70 and the main shaft portion 68. Thus, the piston 13 can be attached to one end of the rod 12.

Here, the rod 12 is inserted into the spindle portion 68, inserted into the rod guide 45 of the pressure cylinder 11, the seal ring 46 and the retaining ring 47, and the seal ring 46 is the main shaft portion 68 of the seal rod 12 and the cylinder body 22 The gap between the body portions 25. The piston 13 is fitted to the main body portion 25 on the inner deep side so as to be further rotatable relative to the inner protruding portion 28 on the deep side of the cylinder main body 22, whereby the rod 12 can be pressed against the pressure. The cylinder 11 is relatively rotated and axially moved. Further, it is preferable that the outer peripheral surface of the piston 13 is subjected to resin processing, and further, a seal may be provided. Since the rod 12 protrudes from the cylinder 11 and the pressure receiving area in the cylinder 12 and the cylinder 11 of the piston 13 is different, the piston 13 and the rod 12 can be biased toward the protruding direction by the gas reaction force.

As shown in Fig. 1, a mounting bracket 73 is fixed to the other end portion of the main shaft portion 68 of the rod 12 that protrudes from the cylinder 11. The mounting bracket 73 has a mounting plate portion 75 in which the mounting hole 74 is formed, and a holding plate portion 76 that rises perpendicularly from one end portion of the mounting plate portion 75. The holding plate portion 76 is formed with the rod 12 The insertion hole 77 through which the spindle portion 68 is inserted. The mounting bracket 73 is fixed to the rod 12 by welding while the mounting plate portion 75 is disposed on the opposite side of the rod 12 of the holding plate portion 76.

As shown in Fig. 2, in the first embodiment, a substantially cylindrical metal cylinder side member 79 is fitted and fixed to the cylinder main body 22. The cylinder side member 79 is fitted to the main body portion 25 of the cylinder body 22 in a state of being sandwiched by the inner protruding portions 27 and 28 on both sides of the cylinder main body 22, whereby it is possible to restrict the non-alignment thereof. The cylinder body 22 is a movement of the cylinder 11 in the axial direction. Also, in the side of the pressure cylinder The member 79 is formed with a plurality of locking recesses 80 that are recessed in the center in the axial direction of the outer peripheral surface at intervals in the circumferential direction, and the locking projections 29 of the cylinder body 22 respectively enter the same. The rotation of the cylinder body 22 can be restricted by the locking recess 80.

The inner circumferential surface of the cylinder side member 79 which is one of the circumferential surface of the cylinder side member 79 and the circumferential surface of the rod 12 is such that the axial direction from the inner circumferential surface is toward the radial direction of the cylinder 11 The extended projections 81 are provided at positions which are 180 degrees apart from each other in a plurality of specific portions and circumferential directions of the inner peripheral surface. The protrusion 81 described above is formed in a cylindrical shape in the radial direction of the cylinder body 22, and is disposed between the piston 13 and the retaining ring 47. These projections 81 are coaxial fitting holes 82 formed in the radial direction by the cylinder side member 79 in the radial direction, and the cylindrical piston 83 is partially protruded from the cylinder side member 79 toward the inside. The fitting hole 82 is inserted into this, whereby it can be formed by the protruding portion of the pin 83. This cylinder member 79 constitutes a cylinder side member of the present invention. Further, the pin 83 is rotatably fitted to the fitting hole 82.

The outer peripheral surface of the rod 12 as the other of the circumferential surface of the cylinder side member 79 and the circumferential surface of the rod 12 opposed to the circumferential surface on which the projection 81 is provided protrudes in the radial direction of the rod 12. Specifically, as shown in Fig. 3, the five types of overhanging portions 85, 86, 87, 88, and 89 are formed so as to have a phase difference of 180 degrees, and the two groups are formed in the same manner in the circumferential direction of the rod (Fig. 3). Left and right direction). These two sets of outward extensions 85 to 89 are abutted against the outer peripheral surface of the projection 81 and guided by the two. These two groups The overhanging portions 85 to 89 are formed, for example, by cutting out the cutting process of the rod 12, and are integrated with the rod 12. In the present embodiment, the rod 12 itself constitutes the rod side member of the present invention. The rod 12 is rotatable relative to the cylinder side member 79 fixed to the cylinder 11, so that the cylinder 11 can be relatively rotated.

One of the overhanging portions 85 to 89 will be described. In addition, hereinafter, the same group is displayed unless otherwise specified. As shown in Fig. 2, the overhanging portion 85 is disposed between the overhanging portions 85 to 89, and is disposed on the side of the rod 12 that is the most inserted side of the cylinder 11, that is, the contraction side of the rod axial direction. In other words, the overhanging portion 85 is disposed closer to the bottom side than the opening portion 23 of the cylinder 11 .

As shown in Fig. 3, the overhanging portion 85 has a flat surface 91a extending in the circumferential direction of the rod (the horizontal direction in Fig. 3) and orthogonal to the axial direction of the rod (the upper and lower directions in Fig. 3) (in other words, it is disposed at a fixed position in the axial direction of the rod); and the release position concave surface 92a is recessed from the one end position in the rod circumferential direction of the flat surface 91a toward the contraction side of the rod axial direction (the lower side of FIG. 3) And a locking position concave surface 93a which is formed by a curved surface which is recessed toward the contraction side of the rod axial direction at a position intermediate to the flat surface 91a and which is shallower than the relief position concave surface 92a. The opposite side of the release position concave surface 92a from the flat surface 91a is coupled to the flat surface 91a of the other group, and the opposite side of the flat surface 91a from the release position concave surface 92a is also connected to the other group of the release position concave surface 92a. Here, the release position concave surface 92a and the lock position concave surface 93a are formed in an arc shape larger than the diameter of the projection 81, and are arranged in the rod circumferential direction. A phase difference of 90 degrees.

As shown in Fig. 2, the overhanging portions 86, 87 are disposed closer to the protruding side of the rod 12 from the projecting side of the cylinder 12 than the overhanging portion 85, that is, the rod axial direction. In other words, the overhanging portions 86 and 87 are disposed closer to the opening portion 23 side of the cylinder 11 than the overhanging portion 85. As shown in Fig. 3, the overhanging portions 86, 87 form a symmetrical shape around the lock position concave surface 93a in the circumferential direction of the rod.

The overhanging portion 86 is formed in a substantially triangular shape, and the contracting side (the lower side in FIG. 3) of the rod axial direction is a concave surface 95a which is formed by a curved surface which is recessed toward the extending side of the rod axial direction. Further, the side in which the rod axial direction of the overhanging portion 86 extends is "the side closer to the contracting position concave side 93a of the rod circumferential direction, and the more inclined the side in the axial direction of the rod (the side of the overhanging portion 85)" Inclined surface 96a. The surface 97a that connects the concave surface 95a and the inclined surface 96a to the opposite side of the locking position concave surface 93a in the rod circumferential direction is disposed along the rod axial direction, and the releasing position concave surface 92a is disposed in the extending direction of the surface 97a. The flat surface 91a side. In the circumferential direction of the rod, the surface 97a of the overhanging portion 86 is disposed on the inner side of the release position concave surface 92a, and the end portion on the opposite side of the surface 97a of the overhang portion 86 is disposed outside the lock position concave surface 93a. The concave surface 95a has a larger diameter than the diameter of the projection 81, and the width of the concave surface 95a in the circumferential direction of the rod is wider than the diameter of the projection 81.

The overhanging portion 87 is formed in a substantially triangular shape, and the contracting side (the lower side in FIG. 3) of the rod axial direction is a concave surface 100a which is formed by "a curved surface which is recessed toward the extending side of the rod axial direction". Again, the extension 87 The side in which the rod is extended in the axial direction is the inclined surface 101a which is inclined so as to be inclined toward the contraction side (the overhanging portion 85 side) of the rod axial direction toward the lock position concave surface 93a side in the rod circumferential direction. The surface 102a that connects the concave surface 100a and the inclined surface 101a to the opposite side of the lock position concave surface 93a in the rod circumferential direction is disposed along the rod axial direction, and the flat surface 91a is disposed in the extending direction of the surface 102a. The opposite end side of the position concave surface 92a (i.e., the end side of the other group of the relief position concave surface 92a opposite to the flat surface 91a of the group). In the circumferential direction of the rod, the surface 102a of the overhanging portion 87 is disposed on the inner side of the release position concave surface 92a of the other group, and the end portion on the opposite side of the surface 102a of the overhang portion 87 is disposed outside the lock position concave surface 93a. The concave surface 100a has a larger diameter than the diameter of the projection 81, and the width of the concave surface 100a in the circumferential direction of the rod is wider than the diameter of the projection 81.

The overhanging portion 88 is disposed closer to the extending side of the rod axial direction (the opposite side of the overhanging portion 85) than the overhanging portions 86, 87, and is aligned with the locking position concave surface 93a in the rod circumferential direction. The overhanging portion 88 is formed in a substantially equilateral triangle shape, and the contracted side in the axial direction of the rod is a concave surface 105a which is formed by a curved surface that is recessed toward the axial extension side of the rod. Further, the side in which the rod axial direction of the overhanging portion 88 extends is a pair of inclined surfaces 106a and 107a which are inclined so as to be located on the inner side in the axial direction of the rod. The inclined faces 106a and 107a are such that the angles in the axial direction of the rod are equal, and the height in the axial direction of the rod is also equal. Therefore, the inclined faces 106a, 107a are formed in a line symmetrical shape along a line passing through the axial direction of the corner portion between the corners. The corner is positioned in the circumferential direction of the rod It coincides with the center of the concave position 93a of the locking position of the overhanging portion 85.

In the circumferential direction of the rod, the end portion on the side of the overhanging portion 86 of the overhanging portion 88 is disposed on the side of the overhanging portion 87 on the inner side of the overhanging portion 86, and the end portion on the side of the overhanging portion 87 of the overhanging portion 88, It is disposed on the side of the overhang portion 86 of the inner side of the overhanging portion 87. The overhanging portion 88 is such that the center of the rod circumferential direction coincides with the center of the locking position concave surface 93a and overlaps the entire range of the rod circumferential direction of the locking position concave surface 93a. The concave surface 105a has a larger diameter than the diameter of the projection 81, and the width of the concave surface 105a in the circumferential direction of the rod is wider than the diameter of the projection 81. Further, the length of the concave surface 105a in the circumferential direction of the rod is longer than the length in the circumferential direction of the rod of the lock position concave surface 93a, and the position in the circumferential direction of the rod coincides with the projection 81 fitted to the concave surface 93a of the lock position and toward the shaft to.

The overhanging portion 89 is disposed slightly offset from the overhanging portion 88 on the extending side of the rod axial direction (the opposite side of the overhanging portion 85), and is aligned with the releasing position concave surface 92a in the rod circumferential direction. The overhanging portion 89 is formed in a substantially parallelogram shape, and the contraction side of the rod axial direction is "inclined so as to be closer to the extending side of the rod in the axial direction of the rod." The inclined surface 110a. Further, the side in which the rod axial direction of the overhanging portion 89 extends is "the inclined surface 111a which is inclined so as to be located on the side of the extending portion 86 in the circumferential direction of the rod." The surface 112a that connects the inclined surface 110a and the inclined surface of the inclined surface 111a in the rod circumferential direction outwardly extending portion 86 is along the axial direction of the rod, and the surface 97a of the overhanging portion 86 is disposed in the extending direction of the surface 112a. And the position concave portion 92a is released from the outward extension portion 86 side. Inclined surface 110a and inclined surface A surface 113a of the end portion of the 111a opposite to the outer circumferential direction of the rod extending portion 86 is connected along the axial direction of the rod, and an overhanging portion 87 with the other group is disposed in the extending direction of the surface 113a. The outward surface portion of the surface 102a and the relief position concave surface 92a are opposite end sides. The overhanging portion 89 is such that the center of the rod circumferential direction coincides with the center of the releasing position concave surface 92a, and the center of the outwardly extending portion 88 is out of phase by 90 degrees in the circumferential direction of the rod.

The piston 13 and the rod 12 shown in Fig. 2 are applied with a gas reaction force, and by the gas reaction force, the piston 13 moves while expanding the chamber 15 while reducing the chamber 14. Thus, the rod 12 is moved to the extended side protruding from the pressure cylinder 11. At the time of this movement, when the rod 12 approaches the maximum protruding state which is most protruded from the pressure cylinder 11, as shown in Fig. 3, the rod 12 is located among the overhanging portions 85 to 89 to be located on the extended side (Fig. 3) The inclined surface 106a of the overhanging portion 88 of the upper side, the inclined surface 111a of the inclined surface 107a or the overhanging portion 89, or the inclined surface 96a of the overhanging portion 86 directly on the contracting side (the lower side of Fig. 3) The inclined surface 101a of the overhanging portion 87 abuts against the projection 81 fixed to the cylinder side member 79 of the cylinder 11.

In the case where the inclined surface 106a of the overhanging portion 88, the inclined surface 107a, or the inclined surface 111a of the overhanging portion 89 abuts against the projection 81, the one of the above-described inclinations causes the projection 81, that is, the cylinder 11, to relatively rotate. Then, when the protrusion 81 is in contact with the inclined surface 106a of the overhanging portion 88, the inclined surface 96a of the outer protruding portion 86 abuts, and the inclined surface 107a of the overhanging portion 88 abuts. The inclined surface 101a of the outer protruding portion 87 abuts, and the inclined surface 111a of the overhanging portion 89 comes. The abutment will be abutted next time by the inclined surface 101a of the overhanging portion 87 of the other group.

Then, when the pair of projections 81, the inclined surface 96a of the overhanging portion 86 or the inclined surface 101a of the overhanging portion 87 abut, the outer portion 85 is extended after the cylinder 11 is relatively rotated by one of the above-described inclinations. The locking position concave surface 93a is abutted. Thereby, the rod 12 becomes the most protruded state which protrudes most from the cylinder 11. For example, as shown in Fig. 3, the rod 12 is abutted against the projection 81 relatively close to the position indicated by A1 at the inclined surface 106a of the overhanging portion 88 as indicated by A2, and the projection 81 is made with the inclination After the cylinder 11 is relatively rotated, the inclined surface 96a of the overhanging portion 86 is abutted as shown by A3, and after the projection 81, that is, the cylinder 11 is relatively rotated by the inclination, the locking position of the overhanging portion 85 is indicated by A4. The concave surface 93a comes into contact. Here, since the projections 81 are configured such that the pin 83 is rotatably fitted to the fitting hole 82 as shown in Fig. 2, even the inclined faces 96a and 101a shown in Fig. 3 are placed. When one of 106a, 107a, and 111a moves relative to each other, the frictional resistance can be reduced by the rotation.

In the above-described maximum protruding state, the overhanging portion 85 can be pressed against the projection 81 by the gas reaction force applied to the rod 12 through the piston 13 shown in Fig. 2, and the concave position 93a of the lock position shown in Fig. 3 can be maintained. It abuts against the state of the protrusion 81. In the above, at least the inclined surface 96a of the overhanging portion 86 or the inclined surface 101a of the overhanging portion 87 is located in the locking position concave surface 93a in which the projection 81 is aligned with the position of the overhanging portion 88 in the circumferential direction of the rod and located on the back side thereof. Guided by the way, and at this time the pressure cylinder is tilted with its own inclination 11 pairs of rods 12 are relatively rotated.

When the projection 81 abuts against the bottom of the lock position concave surface 93a, the cylinder 11 is positioned at the predetermined first relative rotational position with respect to the rod 12. In other words, at least the inclined surface 96a of the overhanging portion 86 or the inclined surface 101a of the overhanging portion 87 is provided on the outer peripheral surface of the rod 12, and when the rod 12 becomes the maximum protruding state, it abuts against the protrusion 81 to make The cylinder 11 relatively rotates the rod 12 and is guided to a predetermined first relative rotational position.

The state in which the first relative rotational position is located is a locked state, and when the rod 12 is to be moved to the contraction side (the lower side of FIG. 3) from this state and inserted into the cylinder 11, the overhanging portion 85 is opposed to After the projection 81 located in the concave portion 93a of the lock position is axially separated from the rod, the concave surface 105a of the overhanging portion 88 opposite to the axial direction of the rod abuts on the retaining position concave surface 93a and is retained, and the restricting rod 12 is further advanced. Movement of the contraction direction of the pressure cylinder 11. Further, at this time, even if the pressure cylinder 11 relatively rotates the rod 12, the concave surface 95a of the overhanging portion 86 shown in Fig. 3 or the concave surface 100a of the overhanging portion 87 may abut against the projection 81 and restrict the rod. 12 moves further toward the contraction direction.

As a result, when the cylinder 12 is in the maximum protruding state in which the rod 12 is most protruded from the cylinder 11 shown in Fig. 2 in accordance with the extending stroke, the cylinder is automatically locked in a locked state. In other words, the overhanging portions 86, 87, 88 shown in Fig. 3 provided on the outer peripheral surface of the rod 12 are when the rod 12 is in the maximum protruding state and the cylinder 11 and the rod 12 become the first relative rotational position described above. At this time, it abuts against the protrusion 81 when the rod 12 is moved to the insertion direction by being opposed to the protrusion 81 in the axial direction. And the locked state of the protrusion 81 is maintained. Here, the concave surfaces 95a, 100a, 105a of the overhanging portions 86, 87, 88 are such that if the center of the protrusion 81 is within the respective range of the circumferential direction of the rod, the restricting rod 12 is contracted over this, and the protrusion is then raised. 81 is guided to the center position of the rod circumferential direction as the deepest position of each.

When the cylinder 11 is relatively rotated from the locked state in the first relative rotational position and becomes the predetermined second relative rotational position different from the first relative rotational position, the protrusion 81 is also integrated with the cylinder 11 The ground is relatively rotated (revolved) to the rod 12. The rod 12 is moved by the rotation of the projection 81, and is moved to the contraction side of the rod axial direction at the initial resistance against the gas reaction force, and the projection 81 is seated on the flat surface 91a from the lock position concave surface 93a, and on the flat surface 91a. After the projection 81 is moved upward, it is moved to the extended side of the rod axial direction by the gas reaction force at the position of the release position concave surface 92a at the final stage, and the projection 81 enters the release position concave surface 92a. In this state, the relief position concave surface 92a abuts against the projection 81 in accordance with the gas reaction force, and the movement in the circumferential direction of the rod is restricted. In other words, the release position concave surface 92a is provided on the outer circumferential surface of the rod 12, and is opposed to the protrusion 81 in the rod axis direction when the cylinder 11 is positioned at the predetermined second relative rotation position with respect to the rod 12. On the other hand, the gas reaction force abuts against the projection 81, and the relative rotation of the cylinder 11 in the rotational direction of the rod 12 is restricted. For example, as shown in Fig. 3, with respect to the projection 81 positioned at the position indicated by A4, the rod 12 is seated on the flat surface 91a from the locking position concave surface 93a as indicated by A5, and is flat. After the protrusion 81 is moved on the surface 91a, the protrusion is made as shown by A6. 81 enters the release position concave surface 92a. At this time, the protrusion 81 also reduces the frictional resistance when moving relative to each other along the lock position concave surface 93a, the flat surface 91a, and the release position concave surface 92a by the rotation.

The state in which the second relative rotational position is the above is the unlocked state, and when the rod 12 is to be moved to the contraction side (the lower side of FIG. 3) from this state and inserted into the cylinder 11, the rod 12 is tied. After the protrusion 81 is passed between the overhanging portion 86 and the surfaces 97a and 102a of the overhanging portion 87 of the other group, the inclined surface 110a of the overhanging portion 89 of the cylinder 11 is abutted against the protrusion 81 and When the projection 81 is approached to the overhanging portion 88, the projection 81 is allowed to move in a further contraction direction. For example, as shown in Fig. 3, with respect to the projection 81 located at the position indicated by A6, the rod 12, as indicated by A7, is between the projection 81 and the overhanging portion 87 of the other group. Thereafter, the inclined surface 110a of the overhanging portion 89 abuts against the projection 81, and as shown by A8, is rotated relative to the cylinder 11, so that the projection 81 approaches the overhanging portion 88 with the inclination, as shown by A9, A state in which further movement of the contraction direction is allowed. When the inclined surface 110a is relatively moved, the protrusion 81 can also reduce the frictional resistance by self-rotation.

As described above, the end edge portion including the flat surface 91a, the release position concave surface 92a, and the extended portion 85 of the lock position concave surface 93a is formed so that the rod 12 becomes the most protruding state that protrudes most from the cylinder 11, The maximum length abutment portion 115 is connected to the protrusion 81. In other words, the maximum length abutting portion 115 includes: a flat portion 91 having a flat surface 91a along the direction orthogonal to the rod axis; and having a relief from the flat surface 91a A release position recess (recess) 92 of the position concave surface 92a; and a lock position concave portion 93 having a lock position concave surface 93a recessed from the flat surface 91a.

Further, the end edge portion including the concave surface 105a of the overhanging portion 88 constitutes a locking portion 105 which is partially disposed in the circumferential direction and axially opposed to the maximum length abutting portion 115, and is reduced in the cylinder device. When the length is such that the projection 81 abuts, the restriction lever 12 is further moved to the contraction direction, and the end edge portion including the concave surface 95a of the overhanging portion 86 also constitutes the same locking portion 95, and the end edge portion of the concave surface 100a including the overhanging portion 87 is formed. The same locking portion 100 is also formed. The lock portions 95, 100, and 105 are formed with surfaces 95a, 100a, and 105a that face the maximum length abutment portion 115 on the concave surface. The width of the locking portions 95, 100, and 105 is wider in the circumferential direction of the rod than the diameter of the projection 81.

The maximum length abutting portion 115 is such that the position of the flat surface 91a and the lock position concave surface 93a in the circumferential direction facing the lock portions 95, 100, and 105 are such that the rod 81 is not in the range when the projection 81 is in the range. Moving to the lockable position in the contraction direction, and making the position of the release position concave surface 92a which is the range of the circumferential direction which does not face the lock portions 95, 100, 105, the rod 12 can be moved to the position where the protrusion 81 is in the range The lock release position in the contraction direction. Therefore, the lockable position of the maximum length abutment portion 115 is constituted by the flat portion 91 having the flat surface 91a in the direction orthogonal to the rod axis and the lock position concave portion 93 having the lock position concave surface 93a, and is at the maximum length The unlocking position of the joint portion 115 is provided with a release position concave portion 92 having a release position concave surface 92a to which the projection 81 is fitted.

Further, the end edge portion including the inclined surface 106a of the overhanging portion 88 constitutes an inducing portion 106 which is disposed away from the maximum length abutting portion 115 in the axial direction, and when the rod 12 is in the maximum protruding state The projection 81 is guided to a position facing the concave surface 105a of the locking portion 105 of the overhanging portion 88 in the circumferential direction of the maximum length abutting portion 115, and the end portion including the inclined surface 107a of the overhanging portion 88 also constitutes the same The inducing portion 107 includes the same inducing portion 111 including the edge portion of the inclined surface 111a of the overhang portion 89, and the end portion of the inclined surface 112a including the overhanging portion 89 also constitutes the same inducing portion 112, including the overhang. The edge portion of the inclined surface 96a of the portion 86 also constitutes the same induction portion 96, and the edge portion including the inclined surface 101a of the overhang portion 87 also constitutes the same induction portion 101. When the rod 12 is extended to the maximum length, the inducing portions 96, 101, 106, 107, 111 automatically rotate the relative rotational positions of the cylinder 11 and the rod 12 to the locked position.

The locking portion 95 and the inducing portion 96 are respectively formed on one side and the other side of the overhanging portion 86 that is disposed away from the maximum length abutting portion 115 in the axial direction, and the locking portion 100 and the inducing portion 101 are formed in the same manner. One side and the other side of the overhanging portion 87, the locking portion 105 and the inducing portions 106, 107 are formed on one side and the other side of the same overhang portion 88, respectively.

The protrusion 81 and the overhanging portions 85 to 89 constitute a manner in which the length can be reduced when the rod 12 is locked to the maximum length of the cylinder 11 and the length cannot be automatically reduced and the cylinder 11 is manually rotated relative to the rod 12 The unlocked cam mechanism 120 is disposed between the cylinder 11 and the rod 12 in the cylinder 11.

As shown in Fig. 1, in the trunk portion 20 of the pressure cylinder 11 The bottom portion 21 side and the mounting plate portion 34 of the mounting bracket 32 are provided with the position confirming portion 121 as described above, and the position confirming portion 121 is configured to confirm that the projection 81 is aligned at the locking position concave portion 93 of the overhanging portion 85. The position of the rod in the circumferential direction, in other words, the rod 12 and the cylinder 11 are located at a predetermined first relative rotational position, in other words, the relative rotational position of the rod 12 and the cylinder 11 is in the locked position. The position confirmation unit 121 is formed of a triangular shape mark 122 formed on the trunk portion 20 of the cylinder 11 along the axial direction of the cylinder, and is formed at the trunk portion 20 along the axial direction of the rod. The triangular shape mark 123 of the mounting plate portion 34 of the bracket 32 is formed.

Then, when the marks 122 and 123 are aligned with the circumferential direction of the cylinder and are in a state of being opposed to the axial direction of the cylinder, the projection 81 is locked in the circumferential direction of the rod. The state of the position concave portion 93, that is, the state in which the rod 12 and the cylinder 11 are located at the predetermined first relative rotational position, in other words, the relative rotational position of the rod 12 and the cylinder 11 is in the locked position. On the other hand, when the positions of the marks 122 and 123 in the circumferential direction of the rod are shifted by a predetermined 90 degrees, the projection 81 is positioned in the circumferential direction of the rod to be aligned with the relief position recess 92 of the overhanging portion 85, in other words, formed. The lever 12 and the cylinder 11 are in a state of a predetermined second relative rotational position, that is, a state in which the relative rotational position of the rod 12 and the cylinder 11 is at the unlocked position. In the mark 122 formed in the cylinder 11, a character "LOCK" indicating that the relative rotational position of the cylinder 11 and the rod 12 is at the lock position is formed.

Further, when mounting the mounting object, the operator attaches the mounting bracket 73 to one of the mounting objects, and releases the nut 40, and the bracket 32 is mounted so that the angle thereof is aligned with the other side of the mounting object. And adjust to install on the other side of the installation object. Therefore, the angle of rotation of the mounting bracket 32 with respect to the cylinder 11 is determined at this point in time. Therefore, the mark 123 of the mounting bracket 32 in a state where the alignment lever 12 is set to the maximum protruding state in a state where the mounting bracket 73 and the mounting bracket 32 are attached to the mounting object and the nut 40 is released, Then, the mark 122 of the pressure cylinder 11 is added. Thus, the mark 122 of the pressure cylinder 11 is set to a seal label that can be attached later. In contrast, the mark 123 of the mounting bracket 32 is formed by marking. In addition, although the example of the character of "LOCK" is shown in the first figure, the character "UNLOCK" which shows the position of the protrusion 81 in the unlocking position of the unlocking position may be described, and both of them may be described.

Next, the operation of the first embodiment described above will be described.

The pressure cylinder device is such that the mounting plate portion 34 of the mounting bracket 32 attached to the pressure cylinder 11 and the mounting plate portion 75 of the mounting bracket 73 attached to the rod 12 are respectively inserted into the mounting hole 33, The lock coupling member of 74 is attached to, for example, a base member (not shown) and an opening/closing member (not shown) that swings the base member. The direction of attachment is such that the opening and closing member is always closed, and it is more desirable to mount the opening and closing member so that the protruding side (upper side in the figure) of the rod 12 of the cylinder device comes to the lower side. This is because the oil in the pressure cylinder will be connected to the seal ring 46 as much as possible. It can ensure sealing and slidability.

The rod 12 is most inserted into the cylinder 11 when the opening and closing member is in the closed state close to the base member, and the rod 12 is most protruded from the cylinder 11 when the opening and closing member is in the open state in which the base member is most separated. Here, since the high pressure gas is filled in the chambers 14, 15, a gas reaction force acting as an elastic pressure in the direction in which the rod 12 protrudes from the cylinder 11 by the pressure difference is generated in the piston 13. . Therefore, the opening and closing member can be maintained in a closed state in a closed state with a higher weight than the gas reaction force, or the base member can be maintained in a closed state by a lock mechanism (not shown).

Then, when the opening and closing member swings, the piston 13 moves into the cylinder axial direction in the cylinder 11 and changes the volume of the chambers 14, 15, at which time the flow path holes 64 of the pistons 13 of the chambers 14, 15 are connected. The flow of oil is controlled and a damping force is generated to suppress the swing speed of the opening and closing member. Oil and gas are sealed in the pressure cylinder 11, and the amount of oil is sealed by the amount of oil flowing from the position where the rod 12 approaches the maximum protruding state to the flow hole 64.

Here, the operator moves the lever 12 to the side protruding from the cylinder 11 by the gas reaction force when the opening and closing member is swung toward the opening direction. Thus, the projections 81 are relatively moved to the side of the rod axially extending portions 85 to 89. At this time, the projections 81 are in the relative positions in the circumferential direction of the rod, and when both the outwardly extending portion 88 and the overhanging portion 89 are offset, they directly abut against one of the inducing portions 96, 101 of the overhanging portions 86, 87. And guided by the guide rod while rotating the rod 12 relative to the cylinder 11, while moving relative to the rod axially extending portion 85 side and reacting with the gas It is forced to abut against the bottom of the locking position recess 93 to stop. In this state, the rod 12 is in the most protruding state that protrudes most from the cylinder 11, and the rod 12 and the cylinder 11 are positioned at the first relative rotational position.

On the other hand, in the case where the position of the protrusion 81 in the circumferential direction of the rod is aligned with the overhanging portion 88, the protrusion 81 abuts against one of the inducing portions 106, 107, and guides the rod 12 with the pressure while guiding it. The cylinder 11 is relatively rotated, relatively moved to the side of the rod axially extending portions 86, 87, and is separated from the overhanging portion 88 toward the circumferential direction of the rod, and further moved relative to the rod axially extending portion 86 or overhanging On the side of the portion 87, one of the inducing portions 96 and 101 of the overhanging portions 86 and 87 is abutted, and then, similarly to the above, the rod 12 and the cylinder 11 are relatively rotated while being guided, and further relative to each other. It moves to the side of the rod axially extending portion 85 and abuts against the bottom of the locking position recess 93 to stop.

Further, when the position of the projection 81 in the circumferential direction of the rod is aligned with the overhanging portion 89, the projection 81 abuts against one of the inducing portions 111, 112, and guides the rod 12 and the cylinder 11 with the guide side thereof. Relatively rotating, relatively moved to the rod axially extending portion 86 or other group of outwardly extending portions 87 side and separated from the overhanging portion 89 toward the rod circumferential direction, and then relatively moved to the rod axially outwardly extending portion 86 or other group outside the extension portion 87 to abut one of the inducing portions 96, 101 of the overhanging portions 86, 87, and then, in the same manner as described above, the rod 12 is guided by The cylinder 11 is relatively rotated, and is further moved to the rod axially outwardly extending portion 85 side and abuts against the locking position recess 93 or the other group of the locking position recesses 93 to stop.

In other words, in either case, the projections 81 are the locking position recesses 93 which are positioned in the circumferential direction of the rod and are recessed toward the axial side of the rod. As described above, when the projection 81 is located in the lock position concave portion 93, as described above, the rod 12 is in the maximum protruding state, and the rod 12 and the cylinder 11 are positioned at the first relative rotational position, and the marks 122 and 123 of the position confirming portion 121 are provided. Make the position of the rod in the circumferential direction consistent.

Next, when the operator rotates the cylinder 11 in one of the 90 degrees from the state in which the projection 81 is in the locking position concave portion 93, the projection 81 is guided by the locking position concave portion 93 to resist the gas reaction force several times. Relatively moving to the opposite side of the outwardly extending portion 85 in the circumferential direction of the rod, thereafter, moving to the circumferential direction of the rod along the flat portion 91, and at the position of the releasing position concave portion 92, entering the releasing position concave portion 92 by the gas reaction force And stop at the bottom of it. Thereby, the rod 12 and the cylinder 11 are positioned at the second relative rotational position in the unlocked state.

At this time, the protrusion 81 is moving in the flat portion 91, and although the gas reaction force generates a rotational impedance in the pressure cylinder 11, at the position where the position concave portion 92 is released, the protrusion 81 naturally enters the release position concave portion by the gas reaction force. Within 92 and abuts at the bottom thereof, the rotation resistance is lowered. Then, when it is desired to further leave the release position recess 92, the rotational impedance caused by the gas reaction force will be generated again. As a result, when the projection 81 is positioned in the release position concave portion 92, a stress of "making the rotational operation force of the pressure cylinder 11 lighter than before" occurs, and a so-called click feeling is generated. .

The operator, with this sense of scorpion, judges that the lock has become The unlocked state is released, and the opening and closing member is swung toward the closing direction against the gas reaction force. Thus, the rod 12 is moved to the rod insertion side, and the protrusion 81 is relatively moved to the opposite side of the rod axially extending portion 85. At this time, since the position of the projection 81 in the circumferential direction of the rod is aligned with the inclined surface 110a of the overhanging portion 89, the projection 81 abuts against the inclined surface 110a, and the rod 12 and the cylinder 11 are relatively rotated with the guide side thereof. While moving relatively to the side of the rod circumferential direction outward extension portion 88 and away from the inclined surface 110a, the projection 81 is directly moved relative to the opposite side of the rod axial outward extension portion 85 in the original state. Thereby, the rod 12 is moved to the rod insertion side so that the opening and closing member is in a closed state, and thereafter, the opening and closing member is locked by the lock mechanism as needed.

Further, when the protrusion 81 is in the state of being positioned in the recessed portion 93 of the lock position, the operator does not rotate the pressure cylinder 11, but causes the opening and closing member to swing against the gas reaction force and toward the closing direction, although the rod 12 moves to the rod insertion side, And the protrusion 81 relatively moves to the opposite side of the rod axially extending portion 85, but the protrusion 81 is aligned with the position of the rod in the circumferential direction of the rod, so that it abuts against the concave surface 105a of the locking portion 105 and The stop at the bottom is stopped, and the relative movement of the opposite side of the overhang 85 toward the axial direction of the rod can be restricted. In other words, it becomes a locked state.

Further, in a state in which the projection 81 is positioned in the lock position concave portion 93, the cylinder 11 is rotated in the range in which the projection 81 is not positioned in the release position concave portion 92, and the opening and closing member is made to be closed against the gas reaction force. When the direction is swung, although the rod 12 will move to the rod insertion The side, and the protrusion 81 relatively moves to the opposite side of the rod axially extending portion 85, but the protrusion 81 is such that one of the locking portions 95, 100 is aligned with the position of the rod circumferential direction and abuts against the locking portion One of the concave faces 95a, 100a of 95, 100 is stopped at its bottom position, and the relative movement of the opposite side of the overhanging portion 85 further toward the axial direction of the rod can be restricted. In other words, it becomes a locked state.

Then, for example, when the operator places the load above the opening and closing member to increase the mass of the opening and closing member, or the gas pressure is lowered due to a decrease in the gas pressure in the pressure cylinder 11, the pressure reaction device is lowered. In the case where the rod 12 cannot be maintained in the maximum protruding state, in other words, in the case where the opening and closing member cannot be maintained in the fully open state, the opening and closing member is swung toward the closing direction against the gas reaction force, and the protrusion 81 is in the locking position. In a state in the recessed portion 93, in other words, in a state where the cylinder 11 and the rod 12 are held at the first relative rotational position, the rod 12 is moved to the rod insertion side, and the projection 81 is relatively moved to the rod-axis direction outward portion 85. Opposite side. In this case, since the projection 81 also aligns the position of the locking portion 105 with the circumferential direction of the rod, it abuts against the concave surface 105a of the locking portion 105 and stops at the bottom position thereof, thereby restricting the rod from further axially. The relative movement of the opposite side of the overhanging portion 85. Therefore, it is possible to restrict the locking state toward the movement of the rod insertion side of the rod 12, and to maintain the opening and closing member in the open state.

In the case where the opening and closing member is closed in this state, the operator presses the opening and closing member, the cylinder 11 is rotated, and the projection 81 is moved from the concave surface 105a of the locking portion 105 to the rod circle. When the outer side in the circumferential direction is in a state where there is no locking portion 105 that restricts the movement of the protrusion 81 toward the opposite side of the rod axially extending portion 85, the protrusion 81 is relatively moved to the axial direction of the rod thereafter. On the opposite side of the overhanging portion 85, the rod 12 is moved to the insertion side so that the opening and closing member is in a closed state, and thereafter, the opening and closing member is locked by the locking mechanism as needed.

In the cylinder device described in the above-mentioned Patent Document 1, when the rod is protruded from the cylinder to the maximum limit, the lock state is automatically restricted to the movement of the rod in the insertion direction of the cylinder, but in the cylinder device As the lock release operation, it is necessary to resist the relatively high gas reaction force and press the lever relatively large, and there is a problem that the operability of the lock release is poor.

On the other hand, according to the first embodiment described above, when the rod 12 is in the maximum protruding state, the inducing portions 96, 101, 106, 107, and 111 which are provided to be separated from the maximum length abutting portion 115 in the axial direction will be The projection 81 is guided to a lock position concave portion 93 which is opposed to the lock portion 105 in the circumferential direction of the maximum length abutment portion 115, whereby the lock portion 105 can restrict the rod 12 from moving in the contraction direction. Since the projections 81 are guided to the circumferential direction of the maximum length abutment portion 115 by the inducing portions 96, 101, 106, 107, 111 which are separated from the maximum length abutting portion 115 in the axial direction, the projection 81 is guided into the circumferential direction of the maximum length abutment portion 115 and locked. Since the portion 105 is opposed to the lock position concave portion 93, it is not necessary to resist the gas reaction force when the lock is released, and the rod 12 and the pressure cylinder 11 are relatively relatively moved. In other words, when it is a configuration in which the protrusion 81 is guided to the lock position concave portion 93 by the gas reaction force and the shape of the maximum length abutment portion 115, it is necessary to release the lock. The protrusion 81 is relatively relatively moved against the gas reaction force, and there is no such necessity. Thus, the rotational torque required for the lock release operation can be alleviated, and the operability of the lock release operation can be improved. In particular, in the case of being disposed in a space that is narrow and difficult to perform a manual operation, it is possible to improve the effect of reducing the rotational torque. In other words, for example, in a case where the fist cannot be placed and only the space of the finger can be placed, the cylinder 11 and the rod 12 can be relatively rotated by the force of the finger, and the lock can be released.

Further, since the operation of the operator who needs to rotate the cylinder 11 and the rod 12 is required, it is possible to prevent the lock from being accidentally released. Further, since the cylinder 11 and the rod 12 are relatively rotated by hand, the lock release is also easy. Therefore, the usability can be improved. Further, since the lock release operation is an operation for relatively rotating the cylinder 11 and the rod 12, it is not necessary to consider the swing of the release member or the like, and it is not easily restricted by the installation space.

More specifically, the inducing portions 96, 101, 106, 107, 111, when the rod 12 is extended to the maximum length, automatically rotate the relative rotational position of the cylinder 11 and the rod 12 to limit the rod 12 from The locked position of the contraction near the maximum length. Thus, it becomes a locked state in which the rod 12 is automatically contracted from the vicinity of the maximum length as long as the rod 12 is extended to the maximum length. Further, when the relative rotational position of the cylinder 11 and the rod 12 is set to a lock release position that allows manual contraction from the vicinity of the maximum length, the rod 12 can be contracted from the vicinity of the maximum length. Therefore, since it is necessary to set the relative rotational position of the cylinder 11 and the rod 12 to the lock release position Do, so you can prevent the lock from being accidentally lifted. Moreover, since the relative rotational position of the cylinder 11 and the rod 12 is set as the unlocking position, it is easy to release the lock. Therefore, the usability can be improved. Further, since the lock release operation is an operation for setting the relative rotational position of the cylinder 11 and the rod 12 to the lock release position, it is not necessary to consider the swing of the release member or the like, and it is less likely to be restricted by the installation space.

Further, the range of the flat portion 91 and the lock position concave portion 93 in the circumferential direction facing the lock portion 95 among the maximum length abutting portions 115 extending in the circumferential direction is such that when the protrusion 81 is in the range, the rod is not made The lockable position moved to the contraction direction, and the range of the release position recess 92 in the circumferential direction that is not opposed to the lock portion 95 is a lock release position in which the lever 12 can be moved to the contraction direction when the projection 81 is in the range Therefore, the protrusion 81 is moved from the lockable position to the lock release along the maximum length abutment portion 115 that extends toward the circumferential direction by the projection 81 that abuts against the maximum length abutment portion 115 with the gas reaction force when the lock is released. Location is fine. Therefore, the rotational torque required for the lock release operation can be alleviated, and the operability of the lock release operation can be further improved.

Further, since the lockable position of the maximum length abutting portion 115 has the flat portion 91, when the lock is released, the protrusion 81 that abuts against the maximum length abutting portion 115 by the gas reaction force can be locked from the flat portion 91. Move the position to the unlocked position. Therefore, the rotational torque required for the lock release operation can be alleviated, and the operability of the lock release operation can be further improved.

Further, the projection 81 positioned at the unlocking position of the maximum length abutting portion 115 is fitted to the releasing position concave portion 92 by the gas reaction force, whereby the operating force can be stressed, and the operator can be recognized as having been locked. position. In other words, when the cylinder 11 and the rod 12 are in the predetermined second relative rotational position in the unlocked state, which is different from the predetermined first relative rotational position, the lever 12 is defined in the release position concave portion 92 of the lock release position. When moving to the protruding direction, the protrusion 81 is abutted against the protrusion 81 and the movement in the direction of rotation is restricted. Therefore, the cylinder 11 and the rod 12 can be changed to the predetermined second relative rotational position that has become the unlocked state. Pass to the operator. Therefore, the usability can be further improved.

Further, since the lock portion 95 and the induction portion 96 are respectively formed on one side and the other side of the overhang portion 86 which is provided to be separated from the maximum length contact portion 115 in the axial direction, the lock portion 100 and the induction portion 101 are respectively formed in One side and the other side of the same overhanging portion 87, the locking portion 105 and the inducing portions 106, 107 are respectively formed on one side and the other side of the same overhanging portion 88, so that the number of the overhanging portions can be reduced, and the lightening portion can be made light Quantitative and cost-effective.

Further, since the widths of the lock portions 95, 100, and 105 are respectively wider than the diameter of the projections 81, the rod 12 can be excellently restricted from moving to the contraction direction.

Further, since the surfaces facing the maximum length abutting portions 115 of the lock portions 95, 100, and 105 are the concave surfaces 95a, 100a, and 105a, the rod 12 can be excellently restricted from moving to the contraction direction.

Further, by observing the position confirming portion 121 at the outer position of the cylinder 11, it is possible to confirm that the projection 81 is at the lock position facing the lock portion 95 in the axial direction of the rod, so that the operator can easily and surely recognize the projection 81. It is in a locked position opposite to the locking portion 95 in the axial direction of the rod. Therefore, the usability and safety can be further improved.

Moreover, since the cam mechanism 120 can be incorporated in the pressure cylinder 11, it has the same outer shape as the gas spring of the prior art, and can be reduced in size as a whole.

Further, since the projection 81 is configured such that the pin 83 is rotatably fitted to the fitting hole 82, when the projection 81 abuts against the maximum length abutting portion 115, the projection 81 can be rotated (rotation) ) to reduce the frictional impedance. Therefore, the rotational moment required for the lock release operation can be further reduced, and the operability of the lock release operation can be further improved.

"Second embodiment"

Next, a second embodiment of the present invention will be described mainly on the basis of Fig. 4 and a difference from the first embodiment. In addition, the parts common to the first embodiment are denoted by the same reference numerals and the same symbols.

In the second embodiment, the protruding portions 130 and 131 which are more protruded than the flat portion 91 are formed between the flat portion 91 as the lockable position and the rod circumferential direction of the release position concave portion 92 as the unlocked position. . The protrusions 130 and 131 are semicircular in cross section, and the protrusions 81 are in the circle along the maximum length abutment 115. The circumferential direction can be crossed when moving from the flat portion 91 to the release position concave portion 92.

In the second embodiment, when the rod 12 is moved to the extension side (the upper side in Fig. 4) and protrudes from the cylinder 11, the rod 12 is guided by the induction portions 96, 101, 106, as in the first embodiment. The guiding of one of 107, 111 causes the protrusion 81, that is, the cylinder 11, to rotate relative to each other, and finally becomes the locking position of the overhanging portion 85. The concave surface 93a abuts against the projection 81 and is positioned at the first relative rotational position with respect to the cylinder 11. Lock status (for example, refer to A1 to A4).

Then, when the cylinder 12 is in the predetermined second relative rotational position in which the rod 12 is relatively rotated and is in the unlocked state, the projection 81 that rotates integrally with the cylinder 11 is struck after traveling on the flat surface 91a. The gas reaction force passes over one of the projections 130, 131 and enters the relief position concave surface 92a. For example, as shown in FIG. 4A5, the protrusion 81 passes over the protruding portion 131 against the gas reaction force as shown by B5 after traveling on the flat surface 91a, and enters the release position concave surface 92a as indicated by A6.

When the lever 12 is to be inserted into the cylinder 11 from the unlocked state to the contracted side, the rod 12 is passed through the overhanging portion 86 and the overhanging portion 87 of the other group as in the first embodiment. After the surfaces 97a and 102a are in contact with each other, the inclined surface 110a of the overhanging portion 89 abuts against the projection 81 and the cylinder 81 is relatively rotated so that the projection 81 approaches the overhanging portion 88. The state of the movement in the contraction direction (for example, refer to A6 to A9).

According to the second embodiment above, since it is lockable The protruding portion 130 and 131 protruding more than the flat portion 91 are formed between the flat portion 91 at the fixed position and the circumferential direction of the rod at the releasing position concave portion 92 as the unlocking position, so the protruding portions 130 and 131 and the releasing position concave portion are formed. 92, the movement of the rod in the circumferential direction of the projection 81 is restricted, that is, the relative rotation of the cylinder 11 to the rod 12. Therefore, the pressure cylinder 11 can be excellently transmitted to the operator by the change in the operational feeling by the predetermined second relative rotational position in which the rod 12 has become the unlocked state. Therefore, the usability can be further improved.

"Third embodiment"

Next, a third embodiment of the present invention will be described mainly on the basis of Fig. 5 and focusing on the difference from the first embodiment. In addition, the parts common to the first embodiment are denoted by the same reference numerals and the same symbols.

In the third embodiment, the shape of the maximum length abutting portion 115 of the overhanging portion 85 is different from that of the first embodiment. The maximum length abutting portion 115 of the third embodiment is configured such that the opening side of the lock position concave surface 93a similar to the first embodiment is connected to the bottom side of the release position concave surface 92a and the other group release position concave surface 92a. Instead of the flat surface 91a of the first embodiment, inclined surfaces 135a and 136a are formed. The inclined surface 135a connects the lock position concave surface 93a and the release position concave surface 92a, and the inclined surface 136a connects the lock position concave surface 93a with the other set of release position concave surfaces 92a, regardless of which is the lock position concave surface 93a. It is inclined in such a manner that the axial direction of the rod extends (the upper side of Fig. 5). Therefore, the maximum length abutting portion 115 of the third embodiment is composed of: The release position concave portion 92 including the release position concave surface 92a; the lock position concave portion 93 including the lock position concave surface 93a; and the inclined portion 135 including the inclined surface 135a; and the inclined portion 136 including the inclined surface 136a.

In the maximum length abutting portion 115 of the third embodiment, the positions of the inclined surfaces 135a and 136a and the locking position concave surface 93a which are the circumferential direction of the locking portions 95, 100, and 105 are the protrusions. When the 81 position is in this range, the lever 12 becomes a lockable position that cannot be moved to the contraction direction (the downward direction in Fig. 5), and is a concave position of the release position which is a range of the circumferential direction that does not face the lock portions 95, 100, 105. The position of the inclined faces 135a and 136a in the vicinity of 92a and the vicinity thereof is such that the lever 12 is in the lock releasing position which is movable to the contraction direction when the projection 81 is in the range.

In the third embodiment, when the rod 12 is moved to the extension side (the upper side in Fig. 5) and protrudes from the cylinder 11, the rod 12 is guided by the induction portions 96, 101, 106, 107 as in the first embodiment. Guided by one of the 111s, the protrusion 81 and the cylinder 11 are relatively rotated, and finally the locking position concave surface 93a of the overhanging portion 85 abuts against the protrusion 81 and is positioned at the first relative rotational position with respect to the cylinder 11 Locked state (for example, refer to A1 to A4).

When the cylinder 11 rotates relative to the rod 12 and becomes the predetermined second relative rotational position from the locked state of the first relative rotational position, the protrusion 81 that rotates integrally with the cylinder 11 is initially resistant to gas reaction. Move a few times and multiply from the locked position concave surface 93a Sitting on one of the inclined faces 135a, 136a and walking on one of the inclined faces 135a, 136a. Here, when the projection 81 is moved by the inclination of the inclined faces 135a, 136a, the projection 81 moves toward the axial direction of the rod while moving toward the circumferential direction of the rod, since the axial direction of the rod is the rod 12 to which the gas reaction force is applied. The direction of extension, so it can further reduce the operating force required for relative rotation.

Then, when the cylinder 11 is at the predetermined second relative rotational position with respect to the rod 12, the projection 81 comes into a locked release state in which the projection 81 comes into contact with the release position concave surface 92a by the gas reaction force. In this manner, the displacement of the position concave surface 92a and the inclined surfaces 135a and 136a on both sides of the lift target 81 in the circumferential direction of the projection 81 are restricted by the gas reaction force. For example, as shown in Fig. 5, the projection 81 is seated on the inclined surface 135a from the lock position concave surface 93a as indicated by A4, and is formed on the inclined surface 135a, and enters as shown by A6. The position concave surface 92a is released.

When the lever 12 is to be moved to the contraction side (the lower side in FIG. 5) from the unlocked state and inserted into the cylinder 11, the rod 12 is passed through the overhanging portion 86 as in the first embodiment. After being between the surfaces 97a and 102a of the overhanging portion 87 of the other group, the inclined surface 110a of the overhanging portion 89 abuts against the projection 81 and the cylinder 81 is relatively rotated in such a manner that the projection 81 approaches the overhanging portion 88. Thereafter, it is in a state in which the movement in the contraction direction is more allowed (for example, refer to A6 to A9).

According to the third embodiment, the lockable position of the maximum length abutting portion 115 is guided by the inclined portions 135 and 136 which are displaced in the direction in which the gas reaction force is advanced toward the unlocked position side. Since 81, the operability of the lock release operation can be further improved.

"Fourth embodiment"

Next, a fourth embodiment of the present invention will be described mainly on the basis of Fig. 6 and a difference from the first embodiment. In addition, the parts common to the first embodiment are denoted by the same reference numerals and the same symbols.

In the fourth embodiment, the overhanging portion 89 is longer in the circumferential direction of the rod than in the first embodiment, and as a result, the distance between the overhanging portion 86 and the overhanging portion 87 of the other group is wide. Further, in the fourth embodiment, the shape of the maximum length abutting portion 115 of the overhanging portion 85 is different from that of the first embodiment.

In other words, the outwardly extending portion 85 of the fourth embodiment does not have the lock position concave surface 93a and the release position concave surface 92a of the first embodiment, but is the same as the center position of the overhang portion 89 in the rod circumferential direction. At a position, a protruding portion 140 that protrudes from the flat surface 91a of the flat portion 91 to form a thin head shape is formed. The surfaces 140a and 140b on both sides in the circumferential direction of the rod of the protruding portion 140 are formed into a curved concave shape which is the same as the diameter of the projection 81.

Here, when the protrusion 81 has simultaneously abutted against the flat surface 91a and one of the surfaces 140a and 140b of the protruding portion 140, it is present in the protruding portion 140 in the circumferential direction of the rod with the projection 81. An outwardly extending portion 86 is formed at a position where the opposite end position is further away from the projection 140. The maximum length abutting portion 115 is composed of the flat portion 91 and the protruding portion 140, and is in the flat surface 91a and the locking portions 95, 100, 105 The range of the circumferential direction of the opposing direction is a lockable position in which the rod 12 is not movable to the contraction direction when the projection 81 is in the range, and is not in the flat surface 91a opposite to the lock portions 95, 100, 105. The vicinity of the protruding portion 140 is a lock releasing position in which the rod 12 can be moved to the contracting direction (the lower direction in Fig. 6) when the projection 81 is in the range.

In the fourth embodiment, when the rod 12 is moved to the extension side (the upper side in Fig. 6) and protrudes from the cylinder 11, the rod 12 is guided by the induction portions 96, 101, 106 as in the first embodiment. Guided by one of 107, 111, the protrusion 81 and the cylinder 11 are relatively rotated, and finally the flat surface 91a of the overhanging portion 85 abuts against the protrusion 81 and is positioned at the first relative rotational position with respect to the cylinder 11 Lock status (for example, refer to A1 to A3, D4). In this locked state, the relative rotation of the rod 12 and the cylinder 11 can be restricted by the frictional force caused by the gas reaction force occurring between the projection 81 and the flat portion 91. In this case, even if the cylinder 11 is relatively rotated relative to the rod 12, the concave surface 95a of the overhanging portion 86 or the concave surface 100a of the overhanging portion 87 may abut against the projection 81, and the restricting rod 12 may be further oriented toward the contraction. The direction of movement.

When the lock state from the first relative rotational position is the predetermined second relative rotational position in which the cylinder 11 relatively rotates the lever 12 and is different from the first relative rotational position, the projection 81 is in the relative rotation. The range travels on the flat surface 91a. Therefore, it is not necessary to move the protrusion 81 against the gas reaction force in the entire range of the relative rotation, and the operation force required for the relative rotation can be reduced. Then, when the predetermined second relative rotational position is reached, the protrusion 81 abuts against the protrusion of the protruding portion 140. The release state is fixed. At this time, the relative rotation of the cylinder 11 to the rod 12 can also be restricted by the frictional force caused by the gas reaction force occurring between the projection 81 and the flat portion 91. For example, as shown in Fig. 6, the projection 81 positioned at the position indicated by D4 travels on the flat surface 91a of the rod 12 as indicated by D5, and abuts against the surface 140b of the projection 140 as indicated by D6. .

When the rod 12 is to be inserted into the cylinder 11 from the lock release state to the contraction side (bottom of Fig. 6), the rod 12 passes the projection 81 through the overhang portion 86 and other groups as indicated by D7. After the surfaces 97a, 102a of the overhanging portion 87 are in contact with each other, and the inclined surface 110a of the overhanging portion 89 abuts against the projection 81 and the projection 81 is relatively rotated in such a manner that the projection 81 approaches the overhanging portion 88, the cylinder 11 is relatively rotated. As shown by D8 and D9, it is a state in which the movement in the contraction direction can be more allowed.

According to the fourth embodiment as described above, since the cylinder 11 can be relatively rotated with respect to the entire range from the locked state to the unlocked state with a constant operating force, the operability of the lock releasing operation can be further improved.

In the first to fourth embodiments, the protrusions 81 are provided in the cylinder side member 79 which is separately provided in the cylinder 11, and on the other hand, the overhanging portions 85 to 89 are directly provided on the rod 12 and are provided as The case of the function of the rod side member is described as an example, but another rod side member having the overhanging portions 85 to 89 may be provided on the rod 12, and the protrusion 81 may be directly provided in the pressure cylinder 11 and provided as a pressure cylinder. The function of the side members. Further, contrary to the above, the protrusion 81 may be provided on the rod side member including the rod 12, and the pressure cylinder side member including the pressure cylinder 11 may be disposed outside. Stretches 85 to 89.

"Fifth Embodiment"

Next, a fifth embodiment of the present invention will be described mainly on the basis of the differences between the first embodiment and the third embodiment. In addition, the parts common to the first embodiment are denoted by the same reference numerals and the same symbols.

In the fifth embodiment, a dust cover 240 that covers a portion of the rod 12 that protrudes from the cylinder 11 is provided. The dust cover 240 has a dust cover main body 243 having a substantially cylindrical shape, and the dust cover main body 243 has a tubular portion 241 and a lid portion 242 that closes one end of the cylindrical portion 241, and is in the lid portion 242. The center is supported by the rod 12 in a rotatable manner. The dust cover 240 is provided to be capable of relatively rotating the rod 12 and the pressure cylinder 11 in a state in which the rod 12 is restricted from moving in the axial direction.

In the dust cap main body 243, an annular shape having a smaller diameter than the main body portion 244 of the other fixed diameter is formed by plastic processing on the side opposite to the lid portion 242 of the tubular portion 241 by plastic working. The inner protruding portions 245, 246 of the two portions. Further, in the dust cap main body 243, a plurality of locking projections 247 projecting inward in the radial direction are formed at positions between the inner protruding portions 245 and 246 of the two portions.

In the fifth embodiment, the inner protruding portion 27 in the vicinity of the inner protruding portion 27 of the trunk portion 20 of the cylinder 11 is closer to the outer peripheral surface of the opposite side of the opening portion 23, and is formed with a facing pressure cylinder. A plurality of protrusions 81 extending in the same manner as in the first embodiment are radially extended. In this embodiment, the cylinder system constitutes the cylinder side member of the present invention.

Further, inside the tubular portion 241 of the dust cap main body 243, two phases are formed in the same manner as in the first embodiment in the circumferential direction of the rod (the horizontal direction in Fig. 3) by 180 degrees. Outward extensions 85, 86, 87, 88, 89. The inner peripheral member 82 is sandwiched by the inner protruding portions 245 and 246 on both sides of the dust cap main body 243, and the locking convex portion 247 enters the locking concave portion 83 of the outer peripheral surface. Thereby, the inner peripheral member 82 can restrict the movement of the dust cap main body 243 in the cylinder axial direction and the cylinder circumferential direction. The inner peripheral member 82 constitutes a dust removing cover 240 together with the dust removing cover body 243.

Therefore, the protrusion 81 and the overhanging portions 85, 86, 87, 88, and 89 are provided between the cylinder 11 and the dust cover 240. Thereby, no mechanism is provided between the cylinder 11 and the rod 12 in the pressure cylinder 11.

Further, the pressure cylinder 11 and the dust cover 240 are provided with position confirmation portions similar to those of the first embodiment in which the projections 81 are positioned at the lock position by the appearance. The position confirmation unit is formed by a triangular shape mark 122 formed on the trunk portion 20 of the cylinder 11 along the axial direction of the cylinder, and is formed in the dust cylinder 11 in the axial direction of the cylinder. The triangular shape mark 123 of the cylindrical portion 241 of the cover 240 is formed. In other words, the position confirmation unit can confirm the position of the projection 81 in the locking position facing the axial direction of the cylinder by the appearance of the dust cover 140.

Depending on the role of the above composition, it is the same as the above implementation The same form. Further, in the fifth embodiment, the protrusion 81 is directly provided in the cylinder 11, and the overhanging portions 85, 86, 87, 88, and 89 are provided on the inner circumference of the dust cover 240. The projections 81 are provided on the dust cover 240, and the overhanging portions 85, 86, 87, 88, 89 are provided in the cylinder 11. Further, similarly to the second to fourth embodiments, the shapes of the overhanging portions 85, 86, 87, 88, 89 and the maximum length abutting portion 115 can be appropriately changed.

The first to fifth embodiments described above are a cylinder device having a cylindrical pressure cylinder and a rod cylinder device, the rod system having one end inserted at one end of the pressure cylinder and being biased toward the protruding direction and The cylinder can be relatively rotated, and is characterized in that the cylinder side member and the rod side member are provided to be relatively rotatable, and the cylinder side member is coupled to the pressure cylinder and at least restricts axial movement of the cylinder. The rod side member is disposed on the rod and at least restricts axial movement of the rod, and the cylinder device has a protrusion provided on a circumferential surface of the cylinder side member or a circumferential surface of the rod side member. And one of the circumferential surfaces of the cylinder-side member facing the circumferential surface of the protrusion or the circumferential surface of the rod-side member; One side, and extending toward a circumferential direction in which the protrusion abuts when the rod is in a maximum protruding state; and a locking portion that is axially opposed to the maximum length abutting portion Provided in the circumferential direction, the protrusion abuts when the length is reduced, and restricts the rod from moving further toward the contraction direction; and an inducing portion that guides the protrusion to the aforementioned maximum length when the rod becomes the maximum protruding state The circumference of the abutment The first maximum length abutting portion is provided to be separated from the axial direction so as to be in a position facing the lock portion. Thereby, when the rod is in the maximum protruding state, the inducing portion provided to be separated from the maximum length abutting portion in the axial direction guides the projection to a position in the circumferential direction of the maximum length abutting portion opposite to the locking portion. Thereby, the locking portion restricts the lever from moving to the contracting direction. The projection is guided to the position opposite to the locking portion in the circumferential direction of the maximum length abutting portion by the inducing portion provided to be axially separated from the maximum length abutting portion, whereby the locking portion is restricted Since the rod does not move to the contraction direction, it is not necessary to resist the gas reaction force when the lock is released to largely move the rod and the pressure cylinder relatively. Thus, the operability of the lock release operation can be improved.

Further, in the first to fifth embodiments, the range in the circumferential direction in which the maximum length abutting portion faces the lock portion is such that the rod is not movable in the contraction direction when the protrusion is in the range. The lock position is a range in which the circumferential direction in which the maximum length abutting portion and the lock portion are not opposed is a lock release position in which the rod is movable in the contraction direction when the protrusion is in the range. In this manner, the range of the circumferential direction opposite to the locking portion among the maximum length abutting portions extending in the circumferential direction is a lockable position in which the rod is not movable in the contraction direction when the protrusion is in the range, and the locking portion The range of the circumferential direction that is not opposed to each other is a lock release position that allows the rod to move in the contraction direction when the protrusion is in the range, so that the protrusion is made to follow the maximum length abutment portion extending in the circumferential direction when the lock is released. The lockable position can be moved to the unlocked position. Therefore, you can mention High lock release operation operability.

Further, in the fourth embodiment, the lockable position of the maximum length abutting portion is flat. Thereby, it is only necessary to move the projection from the flat lockable position to the lock release position when the lock is released. Therefore, the operability of the lock release operation can be further improved.

Further, in the first to fifth embodiments, the recessed portion to which the projection is fitted is provided at the unlocking position of the maximum length abutting portion. Thereby, since the projection located at the unlocking position of the maximum length abutting portion is fitted into the concave portion, the operating force can be stressed, and the operator can be recognized that the position is at the unlocking position.

Further, in the second embodiment, between the lockable position and the circumferential direction of the lock release position, a protrusion that can be crossed when the protrusion moves in the circumferential direction along the maximum length contact portion is provided. unit. Thereby, since the protrusion passes over the protruding portion when the projection is moved from the lockable position to the unlocked position, the operating force can be further stressed, and the operator can be recognized that the position has been in the unlocked position.

Further, in the first to fifth embodiments, the lock portion and the inducing portion are respectively formed on one side and the other side of the overhang portion provided to be separated from the maximum length abutting portion in the axial direction. In this manner, since the locking portion and the inducing portion are respectively formed on one side and the other side of the overhang portion provided to be separated from the maximum length abutting portion in the axial direction, the number of the overhanging portions can be reduced, and weight reduction can be achieved. Cost reduction.

Further, the first to fifth embodiments are characterized in that the lock is The fixed portion is wider than the diameter of the aforementioned protrusion. Thus, since the locking portion is wider than the diameter of the projection, the rod can be excellently restricted from moving to the contraction direction.

Further, in the first to fifth embodiments, the surface of the lock portion facing the maximum length abutting portion is formed as a concave surface. In this manner, since the surface of the locking portion opposed to the maximum length abutting portion is formed into a concave surface, the rod can be excellently restricted from moving to the contraction direction.

Further, in the first to fifth embodiments described above, the case where the rod 12 is biased in the protruding direction by the pressure of the gas in the cylinder has been described, but the spring pressure or the pressure of the spring and the spring may be used. The spring pressure exerts the lever 12 in the protruding direction.

Further, in the first to fifth embodiments described above, the opening and closing member is opened by the gas reaction force, but the opening and closing member is moved by the weight of the opening and closing member, the gas reaction force, and the pressure cylinder. The mounting method of the device moves only by the gas reaction force of the cylinder device, and the case where the weight of the opening and closing member is assisted by the gas reaction force of the cylinder device and is moved by the force of the operator, and this embodiment The pressure cylinder device can be applied to both cases.

Further, in the first to fifth embodiments described above, it has been shown that a gas and a small amount of oil are mixed in the cylinder, but the invention is not limited thereto, and the chamber on the bottom side of the cylinder may be freely installed. The piston is sealed with gas on the bottom side, and the oil is sealed on the rod side. According to this configuration, it is possible to provide an arrangement in which the rod protruding side is always kept vertically upward.

Furthermore, in the first to fifth embodiments described above, However, it has been shown that the flow path hole 64 is always open, but is not limited thereto, and may be provided on the second drawing of the piston 13 in the form of a ring-shaped flexible annular metal disk valve; And a fixed orifice with a small flow path area that is always connected. Thereby, it is possible to perform a small force operation when the rod 12 is contracted, and the elongation speed can be adjusted by the area of the fixed orifice at the time of elongation.

Further, in the first to fifth embodiments described above, the rod 12 is fixed and the cylinder 11 side is rotatable. However, the present invention is not limited thereto, and the rod 12 side is opposed to the cylinder 11 Rotation may be performed, and the rod 12 may be provided to be rotatable with respect to the mounting bracket 73, and the mounting bracket 32 may be fixed to the pressure cylinder 11. In other words, as long as the cylinder side member (which is also rotatable relative to the cylinder) that is fixed to the axial direction with the pressure cylinder, and the rod side member (which can also rotate relative to the rod) that is fixed to the axial direction of the rod, The configuration of relative rotation is sufficient.

11‧‧‧pressure cylinder

12‧‧‧ rod (rod side member)

79‧‧‧Cylinder side members

81‧‧‧ Protrusion

85 to 89‧‧‧Extension

91‧‧‧flat

91a‧‧‧flat surface

92‧‧‧Release the recess (recess)

92a‧‧‧Remove the concave position

93‧‧‧Lock position recess

93a‧‧‧Locked position concave

95, 100, 105‧‧‧ Locking Department

95a, 100a, 105a‧‧‧ concave

96, 101, 106, 107, 111, 112‧‧

Inclined faces 96a, 101a, 106a, 107a, 110a, 111a‧‧

97a, 102a, 112a, 113a‧‧‧ surface of the overhanging portion 86

115‧‧‧Maximum length abutment

120‧‧‧Cam mechanism

Claims (9)

A pressure cylinder device is a cylinder device having a cylindrical pressure cylinder and a rod, the rod system having one end inserted into one end of the pressure cylinder and being biased toward the protruding direction and capable of relatively rotating the aforementioned pressure cylinder, characterized in that: The cylinder side member and the rod side member are disposed in a relatively rotating manner, and the cylinder side member is coupled to the pressure cylinder and at least restricts axial movement of the cylinder, the rod side member is attached to the rod and at least limits the rod In the axial movement, the pressure cylinder device has a protrusion that is provided on one of the circumferential surface of the cylinder side member or the circumferential surface of the rod side member and extends in the radial direction; and the maximum length abutment portion Is provided on the other side of the circumferential surface of the cylinder-side member facing the circumferential surface on which the protrusion is provided or the circumferential surface of the rod-side member, and is oriented toward when the rod becomes the maximum protruding state. Abutting in a circumferential direction; and a locking portion partially disposed in a circumferential direction opposite to the axial length of the maximum length abutting portion, when the length is reduced The protrusion abuts and restricts the rod from moving further toward the contraction direction; and an inducing portion that guides the protrusion to the circumferential direction of the maximum length abutting portion when the rod becomes the maximum protruding state and the aforementioned The manner in which the locking portion is opposed to each other is provided so as to be separated from the maximum length abutting portion in the axial direction. The cylinder device according to claim 1, wherein the maximum length abutting portion and the locking portion face each other in a circumferential direction a locking position in which the rod is not movable in a contraction direction when the protrusion is in the range, and a range in which the maximum length abutting portion does not face the circumferential direction of the locking portion is when the protrusion is located in the range The lock release position that allows the aforementioned lever to move in the contraction direction. The cylinder device according to claim 2, wherein the lockable position of the maximum length abutting portion is flat. The cylinder device according to claim 2, wherein the lock release position of the maximum length abutting portion is provided with a recess for fitting the projection. The cylinder device according to claim 3, wherein the lock release position of the maximum length abutting portion is provided with a recess for fitting the projection. The cylinder device according to claim 2, wherein between the lockable position and the circumferential direction of the lock release position, the protrusion is provided along the maximum length abutting portion toward the circumferential direction A protrusion that can be crossed while moving. The cylinder device according to claim 1, wherein the lock portion and the inducer are formed on one side and the other side of the overhang portion that is axially separated from the maximum length abutment portion. The cylinder device according to claim 1, wherein the locking portion is wider than a diameter of the protrusion. The cylinder device according to claim 1, wherein the surface of the lock portion facing the maximum length abutting portion is formed as a concave surface.