JPH10147495A - Column apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate sandwiching work to between objects, and automatically lock it in a necessary length after being sandwiched by constituting a movable ring of ball bodies to be engaged with a release ring by being interposed in a communicating part when hole parts of the movable ring are adjusted to a recessed part of the release ring. SOLUTION: A movable ring 11 is movably installed in the axial direction on a piston rod 2. A flange part 12 is protrusively arranged on the inside end of the movable ring 11 so as to be opposed to the inside end of a cylinder tube 1. In a compression coil spring 13, the movable ring 11 is interposed in the inside end direction of the cylinder tube 1. A release ring 21 is movably installed in the axial direction on the movable ring 11, and a stopper part 22 is protrusively arranged on an outer periphery of the release ring 21. In the compression coil spring 23, the release ring 21 is interposed in the elongating direction of the piston rod. In the release ring 21, an operating tube 24 is extendedly arranged, and a recessed part 25 is bored on an inner peripheral surface so as to be adjusted to hole parts 14. Ball bodies 26 are loosely fitted to the respective hole parts 14 of the movable ring 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a construction in which a building which may be collapsed is supported on a floor or other fixed objects in order to safely secure a rescue team's approach during an earthquake or the like. In order to prevent the collapse of the structure or to secure the cutting width of the road by inserting a sheet pile etc. between the road excavation surfaces in the burial work such as fume pipe etc. The present invention relates to a column device used for holding.

[0002]

2. Description of the Related Art The above-mentioned support device is naturally stretchable so that its length can be adjusted during the work of sandwiching between objects, and a load in a contraction direction is placed between the objects after the work is sandwiched. It is necessary to have a structure such that a pair of rods are screwed in series with a screw mechanism so as to be adjustable in length and a pin is inserted. Conventionally, a lock that locks to a required length is often used.

[0003] However, the above-mentioned conventional support devices include:
It takes a considerable amount of time to extend to the required length and pinch it between objects by a manual twisting operation, and after pinching it requires manual pin insertion for locking. And so on.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the disadvantages of the prior art by making it easier to insert work between objects and automatically locking it to a required length after insertion. It is an object of the present invention to provide an improved support device.

[0005]

According to a first aspect of the present invention, there is provided a supporting device which is inserted into a cylinder tube so as to be capable of extending and contracting in the axial direction so as to be movable in the axial direction, and has a recess formed in the outer peripheral surface at a predetermined pitch along the axial direction. A piston rod, which is mounted on the piston rod so as to be movable in the axial direction while being urged against the cylinder tube in the piston rod contraction direction, and is opposed to the cylinder tube in the piston rod contraction direction; A movable ring having a hole formed so as to be aligned with the concave portion of the piston rod,
The movable ring is axially movably mounted on the movable ring while being urged in the piston rod extension direction, and is opposed to the cylinder tube and the movable ring in the piston rod extension direction and the contraction direction, respectively. A release ring having a recess formed in the surface thereof so as to be aligned with the hole of the movable ring, and a release ring which is loosely fitted in the hole of the movable ring, and the hole of the movable ring is aligned with the recess of the piston rod. A ball that engages the movable ring with the piston rod through the communicating portion and engages the movable ring with the release ring through the communicating portion when the hole of the movable ring is aligned with the concave portion of the release ring. It consists of a body.

In the above-mentioned support device, when the hole of the movable ring is aligned with the concave portion of the piston rod and the movable ring and the piston rod are engaged via the ball, the piston rod is moved through the movable ring. Movement of the cylinder tube in the contraction direction is prohibited, and the cylinder tube is locked.

Further, the piston rod is driven in the extending direction by fluid pressure, electric power or manual means, or the release ring is urged in the contracting direction of the piston rod by manual or other means to be displaced in the same direction. When the piston rod is driven in the contracting direction and the hole of the movable ring is aligned with the concave portion of the release ring and the movable ring is engaged with the release ring via the ball, the piston rod is moved into the cylinder. The tube is movable in the extension direction or the contraction direction with respect to the tube, and is in an unlocked state.

Further, when the piston rod is in the unlocked state, the driving of the piston rod in the extending direction is stopped, or when the biasing of the release ring in the piston rod contracting direction is released, the movable ring is released. The hole is aligned with the recess of the piston rod, the movable ring and the piston rod are engaged via the ball, and the piston rod automatically returns to the locked state.

In the above configuration, the cylinder tube may include an axially displaceable adjusting ring at an inner end thereof. In this case, in the locked state of the piston rod, the fixed position of the piston rod with respect to the cylinder tube is fixed. If there is a gap in the axial direction between the movable ring and the cylinder tube due to the relationship, etc., adjust the adjustment ring as necessary to bring the inner end of the cylinder tube into contact with the movable ring to change the locked state of the piston rod. Can be stabilized.

[0010] In the above-mentioned structure, it is possible to suitably adopt a configuration in which the concave portion of the piston rod is formed of an annular groove formed at a predetermined pitch along the axial direction. The piston rod annular groove,
Preferably, two or more annular grooves adjacent to each other can be arranged in a plurality around the periphery so as to be aligned with each other, thereby stabilizing the locked state of the piston rod and each of the piston rods between the locked state and the unlocked state. Operation can be facilitated. In connection with these, the concave portion of the release ring can also preferably adopt an annular groove that can be aligned with the hole of the movable ring.

For the same reason, it is also possible to adopt a structure in which the recess of the piston rod is formed of a helical groove formed at a predetermined pitch along the axial direction. The hole is a spiral groove on the piston rod,
Preferably, a plurality of spiral grooves can be arranged around the periphery so as to be aligned with two or more spiral grooves adjacent to each other, and the concave portion of the release ring is formed of a spiral groove which can be aligned with the hole of the movable ring. May be.

[0012]

FIG. 1 is a half sectional plan view of a support device according to an embodiment of the present invention when a piston rod is in a locked state, and FIG. 2 is a diagram illustrating a support device shown in FIG. Half cross-sectional plan view when
FIG. 3 is a half sectional plan view when the piston rod in the column device shown in FIG. 1 is contracting under unlocking.

In FIGS. 1 to 3, a piston rod 2 is inserted into a cylinder tube 1 so as to be capable of extending and contracting in the axial direction, and the piston rod 2 extends in an extending direction by supplying air pressure to an air pressure supply port 3 at an outer end of the cylinder tube 1. Can be driven. An adjusting ring 5 is axially movably screwed to the inner end of the cylinder tube 1 via a rod cover 4, and an auxiliary tube 6 extends in the inner end of the adjusting ring 5 in the piston rod extension direction. A stopper portion 7 is provided on the inner wall of the distal end so as to protrude radially inward. Further, the piston rod 2 is provided with a concave portion 8 formed of a continuous annular groove on the outer peripheral surface at a predetermined pitch along the axial direction.

A movable ring 11 is mounted on the piston rod 2 so as to be movable in the axial direction.
A flange 12 projects from the inner end of the auxiliary tube 6 so as to face the inner end of the cylinder tube 1. A compression coil spring 13 is provided between the flange 12 and the stopper 7 of the auxiliary tube 6. Is urged toward the inner end of the cylinder tube 1. Also,
The movable ring 11 has a substantially uniform planetary arrangement with respect to the axis so that a hole 14 in the peripheral wall can be aligned with each of the recesses 8 formed of two adjacent annular grooves among the recesses 8 of the piston rod 2. In each case, a plurality is provided.

A release ring 21 is provided on the movable ring 11.
Are mounted on the outer circumference of the release ring 21 and face the stopper portion 7 of the auxiliary tube 6 and the flange portion 12 of the movable ring 11 in the extension direction and the contraction direction of the piston rod inside the auxiliary tube 6, respectively. The stopper portion 22 is protruded from the release ring 2 as shown in FIG.
1 stopper portion 22 and flange portion 12 of movable ring 11
The compression coil spring 23 is interposed between the movable ring 11 and the movable ring 11 so as to urge the release ring 21 in the piston rod extension direction. An operation tube 24 extends from the outer end of the release ring 21 so as to be movably mounted on the auxiliary tube 6, and a concave portion 25 formed of two annular grooves is formed on the inner peripheral surface. It is drilled so as to be aligned with the hole 14 of the movable ring 11.

A ball 26 is loosely fitted in each hole 14 of the movable ring 11 and each ball 26 is inserted into the hole 14 of the movable ring 11 when the hole 14 is aligned with the recess 8 of the piston rod 2. When the hole 14 of the movable ring 11 is aligned with the recess 25 of the release ring 21, it can be interposed in the communicating portions.

In the above configuration, as shown in FIG. 1, when the piston rod 2 is locked with respect to the cylinder tube 1 in the contraction direction, the hole 1 of the movable ring 11
4 and the recess 8 at any position in the axial direction of the piston rod 2 are aligned, and a ball 26 is interposed in a communicating portion between the two, whereby the movable ring 11 and the piston rod 2 are engaged. I have. In this state, when a load is applied to the piston rod 2 in the contraction direction, the movable ring 1 engaged with the piston rod 2
1 is also urged in the same direction, but there is no room for the ball body 26 to be detached from the communicating portion between the hole portion 14 of the movable ring 11 and the concave portion 8 of the piston rod 2, and the movable ring 11 has its flange portion 12. In the above, the piston rod 2 is opposed to the inner end of the adjusting ring 5 in the contracting direction and the movement in the same direction is restricted, so that the piston rod 2 is prohibited from moving in the contracting direction with respect to the cylinder tube 1 via the movable ring 11. Will be forced to do so. In this state, the flange portion 12 of the movable ring 11 and the adjustment ring 5
When a gap is formed between the inner ring and the inner end, the gap can be eliminated by moving the adjustment ring 5 in the axial direction as necessary.

According to the above operation, even if the support device according to the present invention is sandwiched between the objects and a load in the contraction direction is applied,
The strut device can maintain the locked state and maintain the distance between them.

Next, when the piston rod 2 is extended with respect to the cylinder tube 1 as shown in FIG. 2, when the piston rod 2 in the locked state is driven by air pressure in the extending direction, the ball 26 The movable ring 11 engaged with the piston rod 2 is interlocked with the piston rod 2 in the extension direction of the piston rod against the urging force of the compression coil springs 13 and 23. When the recess 25 is aligned, the ball body 26 is moved to the communicating portion between the two, whereby the movable ring 11 and the release ring 21 are engaged, and the engagement between the movable ring 11 and the piston rod 2 is released. Thus, the extension of the piston rod 2 is permitted. When the driving of the piston rod 2 in the extension direction is stopped during the extension of the piston rod 2, the movable ring 11 is biased by the compression coil spring 13 together with the release ring 21 engaged therewith via the ball body 26. The release ring 21 is displaced in the piston rod contraction direction, and the release ring 21 is urged in the piston rod extension direction by the urging force of the compression coil spring 23 against the movable ring 11, and the hole 14 of the movable ring 11 and the concave portion 8 of the piston rod 2 Is aligned, the ball 26 is moved to the communicating portion between the two, whereby the movable ring 11 and the piston rod 2 are engaged, and the movable ring 11 and the release ring 21 are disengaged. The rod 2 will automatically return to the locked state.

According to the above-described operation, the support device according to the present invention can be easily inserted between the objects, and can be automatically locked after the insertion.

When the piston rod 2 in the locked state is contracted with respect to the cylinder tube 1 as described above, the release ring 21 is moved by the operation tube 24 to the compression coil spring 23 as shown in FIG. When the piston rod 2 is manually displaced in the contracting direction in the contracting direction while the piston rod 2 is displaced in the contracting direction in this state, the hole 14 of the movable ring 11 and the concave portion 25 of the release ring 21 When aligned, the ball 26 is moved to the communicating portion between the two, whereby the movable ring 11 and the release ring 21 are engaged, and the engagement between the movable ring 11 and the piston rod 2 is released.
The contraction of the piston rod 2 is allowed. When the drive of the release ring 21 in the contraction direction is stopped during the contraction of the piston rod 2, the release ring 21 is movable while being urged in the piston rod extension direction by the urging force of the compression coil spring 23 against the movable ring 11. When the hole 14 of the ring 11 and the concave portion 8 of the contracting piston rod 2 are aligned, the ball 26 is moved to the communicating portion between the two, whereby the movable ring 1 is moved.
1 and the piston rod 2 are engaged, the engagement between the movable ring 11 and the release ring 21 is released, the release ring 21 is displaced to the original position by the urging force, and the piston rod 2 is automatically locked. It will return to the state.

According to the above-described operation, the support device according to the present invention sandwiched between the objects can be easily removed from between the objects and released even if a load in the contraction direction is suddenly applied between the objects during the removal. The lock state can be automatically set only by releasing the urging of the ring 21 in the piston rod contraction direction.

[0023]

As described above, the support device according to the present invention is configured as described above, so that the work for inserting the object between the objects is easy, and after the object is inserted, the support device is automatically locked to a required length. Thus, the disadvantages of the prior art can be solved.

[Brief description of the drawings]

FIG. 1 is a half sectional plan view of a support device according to an embodiment of the present invention when a piston rod is in a locked state.

FIG. 2 is a half sectional plan view of the strut device shown in FIG. 1 when a piston rod is extending under unlocking.

FIG. 3 is a half sectional plan view of the strut device shown in FIG. 1 when a piston rod is contracting under unlocking.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder tube 2 Piston rod 8 Recess (piston rod) 11 Movable ring 14 Hole (movable ring) 21 Release ring 25 Recess (release ring) 26 Ball body

Continuation of the front page (72) Inventor Seiji Uchiyama 1-29-29 Komagawa, Higashi-Sumiyoshi-ku, Osaka-shi, Osaka Inside the Osaka Jack Mfg. Co., Ltd. (72) Inventor Tosuji Imaya 1-29-29 Komakawa, Higashi-Sumiyoshi-ku, Osaka No. Osaka Jack Manufacturing Co., Ltd.

Claims (4)

[Claims] 1. A cylinder tube, a piston rod which is inserted through the cylinder tube so as to be able to expand and contract in the axial direction and has a recess formed in the outer peripheral surface thereof at a predetermined pitch along the axial direction. While being urged in the piston rod contraction direction while being movably mounted in the axial direction on the piston rod and facing the cylinder tube in the piston rod contraction direction, the hole in the peripheral wall can be aligned with the recess of the piston rod. A movable ring formed through the cylinder, a cylinder tube and a cylinder tube which are movably mounted in the axial direction on the movable ring while being urged in the piston rod extension direction with respect to the movable ring, and which are respectively movable in the piston rod extension and contraction directions. It is opposed to the movable ring,
A release ring in which a concave portion is bored in the inner peripheral surface so as to be aligned with the hole portion of the movable ring, and a loose fit into the hole portion of the movable ring, and when the hole portion of the movable ring is aligned with the concave portion of the piston rod. The movable ring is engaged with the piston rod through the communicating portion, and when the hole of the movable ring is aligned with the concave portion of the release ring, the movable ring is engaged with the release ring through the communicating portion. A prop device consisting of a ball to be made. 2. The strut device of claim 1, wherein the cylinder tube includes an axially displaceable adjustment ring at an inner end thereof. 3. The strut device according to claim 1, wherein the concave portion of the piston rod comprises an annular groove formed at a predetermined pitch along the axial direction. 4. The support device according to claim 1, wherein the recess of the release ring comprises an annular groove.