JP5205060B2 - Telescopic device - Google Patents

Description

  The present invention relates to a telescopic device for hanging or placing an article such as clothing by using a tension force between a pair of left and right or a pair of upper and lower wall surfaces facing each other in the left-right direction or the up-down direction. is there.

  Generally, in order to hang clothes or the like, a telescopic pole is known in which two pipes are connected so as to be stretchable and spanned between a pair of opposing wall surfaces (see, for example, Patent Document 1).

The telescopic pole includes an outer cylinder and an inner cylinder that are detachably inserted, a fixing screw that fixes the outer cylinder and the inner cylinder at an arbitrary position, and an outer end that is separated from the axial center of the outer cylinder and the inner cylinder. First and second abutting bodies arranged at the portion (wall side end), and an operating body is disposed between the first abutting body and the outer end (wall side end) of the inner cylinder. A screw mechanism capable of adjusting the axial distance between the first contact body and the outer end portion (wall surface side end portion) of the inner cylinder by rotating is provided, and the outer end portion (wall surface side end portion) of the outer cylinder; A spring mechanism having a compression spring is provided between the second contact body and the second contact body. As a result, after roughly adjusting the length of the telescopic pole to the interval between the wall surfaces, the compression spring of the spring mechanism is compressed by receiving the reaction force from the wall surface by adjusting the axial distance in the direction of increasing the axial distance by the screw mechanism. The elastic pole is firmly attached between the wall surfaces by the repulsive force from the compression spring, so that the telescopic pole does not easily fall even when clothes are hung.
Japanese registered utility model No. 3028704

  However, the telescopic pole has the following problems. In other words, the procedure for attaching the telescopic pole between the wall surfaces is as follows: First, loosen the fixing screw, expand and contract the telescopic pole to make a rough adjustment to match the space between the wall surfaces, and then loosen the outer cylinder and the inner cylinder. It is fixed with a screw, and finally, a repulsive force necessary for the compression spring of the spring mechanism is generated while adjusting the screw mechanism. When carrying out these installations alone, first extend and retract the telescopic pole to roughly adjust the length of the pole, then support both the outer and inner cylinders with your hands, and then fix them with fixing screws. It was necessary to carry out work that was not necessary, and it was difficult to do alone. Also, at this stage, the telescopic pole is not fixed between the wall surfaces, so the mounting position on the wall surface deviates from the desired mounting position during the fixing work with the fixing screw while supporting the telescopic pole. It sometimes happened. In addition, since the screw mechanism must be adjusted with the other hand while supporting the telescopic pole with one hand after the fixing work with the fixing screw, not only the repulsive force due to the compression spring may be insufficient, When the telescopic pole is further lengthened, there is a problem that the mounting operation becomes more difficult.

  The present invention provides a telescopic device that eliminates the above-described problems and facilitates the mounting operation when mounting between wall surfaces.

In order to solve the above-described problem, the expansion device of the present invention is an expansion device interposed between a pair of left and right walls or a pair of upper and lower walls facing each other in the left-right direction or the up-down direction. An outer pipe to be abutted, an inner pipe having one end side inserted into the other end side of the outer pipe so as to be movable in the longitudinal direction, and the other end side being smaller in diameter than the outer pipe abutting against the other wall surface; Corresponding to be provided at the wall surface side end of at least one of the two pipes and to contact and abut against the wall surface, and to move and urge the contact member in a direction protruding toward the wall surface side with respect to the pipe An elastic body provided between the contact member and the pipe, and provided between the inner pipe and the outer pipe, and in the longitudinal direction of both pipes by a radial pressing force generated between the two pipes due to relative rotation of both pipes . first fixing means for preventing movement A second fixing means having a fixing screw for fixing the inner pipe and the outer pipe by screwing, and a wall-side end of one of the two pipes is movably inserted, A cylindrical body that can be rotated with respect to the one pipe, and the cylindrical body that can move the one pipe in the axial direction by the rotating operation .
Stretching the inner and outer pipes and pressing the contact member against the wall surface causes the elastic body to be compressed by the reaction force received from the wall surface, so that the expansion device is stretched between the wall surfaces. Can do. And in this state, by fixing by the 1st fixing means, the expansion-contraction apparatus can be fixed between wall surfaces in the said stretched state by preventing the movement of the longitudinal direction of both pipes.

The first fixing means includes a groove that gradually becomes deeper along the circumferential direction of the inner pipe at the insertion side end thereof, a ring-shaped body that enters the groove and is partially opened in the circumferential direction, Provided at one end on the open side of the ring-shaped body, and comprises a projecting portion that projects from the groove portion side in order to move from the state located on the deepest groove portion side to the shallow groove portion side and receive a pressing force from the groove portion May be.

Previous SL second fastening means, a tubular joint having an extended portion extending upwardly of the pipe while being outside fitted to one end of the outer pipe was allowed with the extending portion of the joint You may comprise from the fixing screw which fixes both pipes by screwing into a screw part and then pressing or screwing into the outer surface of the inner pipe.

The abutting member is externally fitted to one end of a cylindrical receiving portion having a partition portion at the intermediate portion, and the pipe corresponding to the abutting member is movably supported on the other end of the receiving portion. A support part, and a pressing part for pressing the partition part at the receiving part side end of the pipe, the pressing part contacting the receiving part through a through hole formed in the partition part at the center part thereof A shaft portion movable in a space formed on the member side is provided in a state of protruding toward the contact member side, and a coil spring constituting the elastic body is compressed between the partition portion and the pressing portion on the shaft portion. It may be exteriorized.

  The pressing portion may be provided with an annular recess into which a part of the coil spring enters.

  The support portion may be provided in a state of projecting inward at the pipe insertion end of the receiving portion, and may be configured from a flange portion that contacts the outer surface of the pipe.

  The pipes are provided with the abutting member and the elastic body at the wall surface side ends of the pipes, and connect the one abutting member and the end of one pipe corresponding to the one abutting position. A screw mechanism that can be adjusted in the axial direction may be provided.

Said tubular body has one end fixed to the contact member of the one, the one pipe is configured provided with a space that is inserted movably in the other end, the screw mechanism, before Symbol tube-shaped body And a cylindrical portion that is provided so as to be integrally rotatable within the cylindrical body, and that is threadably engageable with a shaft portion extending from the contact member side toward the pipe side and a screw member provided at the pipe side end of the shaft portion. It may be constituted by a screwing member fixed to the end of the pipe and movable in the axial direction along with the rotation of the shaft.
Further, the interposing method between the pair of left and right walls or the pair of upper and lower walls facing each other in the left and right direction or the up and down direction by the expansion and contraction device is such that both pipes are extended between the pair of wall surfaces, and one end side of the outer pipe The other end of the inner pipe against the other wall surface, and the other pipe is further extended with respect to one pipe to correspond to the abutting member and the corresponding contacting member. By contracting the elastic body interposed between the pipe and the pipe, the biasing force of the elastic body accompanying the contraction biases the abutting member in the direction of protruding toward the wall surface with respect to the pipe corresponding to the corresponding contacting member. Then, in a state where both pipes are stretched between a pair of wall surfaces, and in a state where both pipes are stretched between a pair of wall surfaces, both pipes are relatively rotated, and a radial pressing force generated between both pipes is used. Work to prevent the movement of both pipes in the longitudinal direction And fixing both pipes with a fixing screw, and rotating the cylindrical body to move the pipe with the wall-side end inserted into the cylindrical body in the axial direction. And a step of adjusting so as to increase the pressing force applied between the wall surfaces.

  When installing the telescopic device between the wall surfaces, the operator adjusts the length of the telescopic device between the wall surfaces by extending the outer pipe and the inner pipe, abuts between the wall surfaces, and further expands the elasticity. A pressing force is generated in the wall surface direction by the pressing member provided with the body, and both pipes can be fixed by the fixing means in this state. After this, even if the operator releases the hand, the telescopic device is attached between the wall surfaces, so that the positional displacement of the telescopic device is unlikely to occur and the pipe is extended and the screw mechanism at the end of the pipe is rotated. Compared to the configuration in which these two operations are performed, the mounting operation is also facilitated. In particular, when the telescopic device is relatively long, the mounting operation is further facilitated as compared with the conventional case.

  The fixing means is a means for preventing the movement of both pipes in the longitudinal direction due to relative rotation of the two pipes, and a groove part gradually deepening along the circumferential direction of the inner pipe at the insertion side end part, and the groove part A ring-shaped body that is intruded and partly open in the circumferential direction, and is provided at one end of the ring-shaped body on the open side, and moves from the position located on the deepest groove side to the shallow groove side to form a groove In order to receive a pressing force from the groove portion, the protrusion portion protruding toward the groove portion side is rotated to rotate the at least one pipe so that the protrusion portion of the ring-shaped body is moved from the deepest portion of the groove portion to the shallowest portion. When the ring-shaped body is bitten between the outer pipe and the inner pipe and at least one of the pipes is further rotated, the biting force increases and both pipes are fixed. In this way, with the inner and outer pipes held in the extended state, that is, without changing the hand, just rotating at least one of the inner pipe and the outer pipe (does not exceed one rotation). ) Since both pipes can be fixed, the fixing work of both pipes is further facilitated.

  A second fixing means different from the fixing means is provided, and the second fixing means has a cylindrical shape provided with an extending portion that is externally fitted to one end of the outer pipe and extends upward from the inner pipe. When it is composed of a joint and a fixing screw that fixes both pipes by screwing into the outer surface of the inner pipe or screwing into the inner pipe after screwing into the threaded portion provided in the extension part of the joint Even when the fixing by the fixing means is released, the second fixing means can securely fix the expansion device in a state of being stretched between the wall surfaces, and a highly reliable expansion device can be obtained. .

  The contact member is externally fitted to one end of a cylindrical receiving portion having a partition portion at an intermediate portion, and a support portion for movably supporting the one pipe is provided at the other end of the receiving portion, A pressing portion for pressing the partition portion is provided at the receiving portion side end of the pipe, and the pressing portion is formed on the contact member side of the receiving portion through a through hole formed in the partition portion at the center thereof. A shaft portion movable in the space is provided in a state of projecting to the contact member side, and a coil spring constituting the elastic body is provided on the shaft portion in a compressed state between the partition portion and the pressing portion. If there is, the pipe that moves in the axial direction can be stably supported at two locations of the support portion at the other end of the receiving portion and the through hole of the partition portion at the intermediate portion of the receiving portion, and the expansion and contraction with high commercial value is possible. A device can be obtained.

  In the case where an annular concave portion into which a part of the coil spring enters in the direction from the pressing surface of the pressing portion toward the non-pressing side, a part of the outer peripheral portion of the coil spring can be supported by the concave portion. Therefore, the coil spring is not greatly displaced, and there is no need to provide a special support structure for the coil spring, and the coil spring can be easily and quickly attached.

When the support portion is provided in a state of projecting inwardly at the pipe insertion end of the receiving portion and is constituted by a flange portion that comes into contact with the outer surface of the pipe, it is possible to reduce the contact resistance accompanying the movement of the pipe while keeping the flange small. It is possible to support the pipe moving at the section.

An opening formed in the outer pipe, and a lever portion attached to the opening edge in a state where the base end portion is swingable around a rotation axis that is parallel to the longitudinal direction of the pipe; When the lever portion is provided with a pressing portion provided in the lever portion for entering the inside of the outer pipe through the opening by pressing the lever portion and pressing the inner pipe against the outer pipe, By swinging the part, the pressing part of the lever part enters the inside of the outer pipe through the opening, and at the same time, the outer surface of the inner pipe is pressed to fix both pipes. In this way, while holding the outer pipe near the lever with one hand and supporting the other inner pipe with the other hand, extend both pipes and adjust the telescopic device to the length between the wall surfaces. Next, a pressing force is generated in the wall surface direction by the pressing member, and by further operating the lever portion, the pressing portion of the lever portion presses the outer surface of the inner pipe, so that both pipes can be placed at arbitrary positions. After that, even if the operator removes his / her hand, the expansion / contraction device is attached between the wall surfaces, the displacement of the expansion / contraction device hardly occurs, and the installation work is easy.

Wedge for the fixing means to enter the gap formed between the inner surface of the outer pipe and the outer surface of the inner pipe from the axial direction at the center side end spaced from the wall surface side of the outer pipe to fix both. And a support member fixed to the outer pipe in order to support the wedge member so as to be movable in the axial direction, the wedge member is formed between the outer surface of the inner pipe and the inner surface of the outer pipe. Both pipes can be fixed simply by inserting them into the gap formed between them. In this way, holding the one pipe near the wedge member with one hand and supporting the other pipe with the other hand, the pipe is extended to adjust the telescopic device to the length between the wall surfaces. The pipes can be fixed at arbitrary positions by causing them to contact each other and subsequently generating a pressing force in the direction of the wall surface by the pressing member and further inserting the wedge member. Even if the hands are released, the telescopic device is attached between the wall surfaces, so that the positional displacement of the telescopic device hardly occurs and the mounting work is easy.

  The pipes are provided with the abutting member and the elastic body at the wall surface side ends of the pipes, and connect the one abutting member and the end of one pipe corresponding to the one abutting position. If the screw mechanism is adjustable in the axial direction, the position of one abutting member and the corresponding end of one pipe is changed by the screw mechanism even after the telescopic device is fixed. Accordingly, it is possible to provide a high-value-added expansion / contraction device capable of adjusting the pressing force in the wall surface direction by the pressing member.

  The screw mechanism includes a cylindrical body having a space where one end is fixed to the contact member and one pipe is movably inserted at the other end, and the cylindrical body is integrally rotated inside the cylindrical body. A shaft portion that is freely provided and that can be screwed into a shaft portion that extends from the contact member side toward the pipe side and a screw member that is provided at the pipe side end of the shaft portion, and is fixed to the end portion of the one pipe. With the screw member that is movable in the axial direction along with the rotation of the portion, the pressing force in the wall surface direction can be adjusted by the pressing member only by rotating the cylindrical body. Is advantageous.

It is a front view which shows the 1st expansion-contraction apparatus which concerns on this invention, and shows the state spanned between wall surfaces. FIG. 2 is an enlarged longitudinal sectional view showing a configuration of a fixing unit shown in FIG. 1. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, (a) showing a state immediately before rotating the outer pipe, and (b) showing a state after rotating the outer pipe by a predetermined angle. FIG. 4 is an enlarged longitudinal sectional view showing a configuration of second fixing means in FIG. 1. FIG. 2 is an enlarged longitudinal sectional view showing a configuration of a first receiving part in FIG. 1. FIG. 4 is an enlarged longitudinal sectional view showing a configuration of a second receiving part in FIG. 1. (A) is an enlarged vertical sectional view showing a state in which the contact member is pressed against the wall surface at the second receiving portion, and (b) shows a state in which the second receiving portion is rotated from the state (a). It is an enlarged vertical sectional view. It is an expanded longitudinal cross-sectional view which shows the structure of a 2nd fixing means. It is an expansion longitudinal cross-sectional view which shows the structure of a 3rd fixing means, (a) shows the state before fixing, (b) has shown the state after fixing. It is an expanded vertical sectional view which shows the structure of a 4th fixing means. It is a disassembled perspective view which shows the structure of the 2nd receiving part of another structure. It is a perspective view which shows a 2nd expansion-contraction apparatus. It is the front view which attached two 1st expansion-contraction apparatuses between the wall surfaces of an up-down direction. FIG. 14 is a side view of FIG. 13. (A) is the BB sectional drawing of FIG. 13, (b) is CC sectional view taken on the line of FIG.

Explanation of symbols

1 outer pipe, 1K opening, 2 inner pipe, 2A base, 3 fixing means, 4 first receiving part, 5 second receiving part (cylindrical member), 5A protrusion, 5B wall surface side part (connecting part), 6 Contact member, 6A circumferential groove, 7, 8 connecting member, 7A, 8A cylindrical part, 7B bottomed cylindrical part, 10 stopper member, 11 body part, 12 groove part, 12A step part, 13 insertion part, 14 ring shape Body, 15 projecting portion, 15A open side end surface, 16 second fixing means, 16A extending portion, 16B joint, 17 screw portion, 18 fixing screw, 19 shelf, 19A support member, 19B pipe material, 19a, 19b pipe, 20 Operation handle, 21 pressing portion, 23 shaft portion, 23A screw portion, 24 main body portion, 24A concave portion, 25 coil spring, 31 pressing portion, 32 annular projection, 33 female screw portion, 41 cylindrical portion (supporting portion), 41 Flange part, 42 internal space, 43 partition part, 44 through hole, 45 washer, 46 screw, 47 cylindrical part, 46T, 48 engaging protrusion, 51 washer, 52 space, 53 step part, 54 shaft part, 54A screw hole , 55 bottom plate part, 56 coil spring, 57 through-hole, 58 male screw material, 59 screw member, 61 elastic member, 61A engaging protrusion, 62 bottom surface, 63 circumferential groove, 72 cylindrical body, 72A female screw hole, 73 break, 78 Lever part, 79 pressing part, 80 gap, 81 wedge member, 81A operation part, 82 support member, 83 opening, A shelf board, B shelf board, N screw mechanism, P pin, P1, P2 telescopic device, S space, W Wall surface, W1 floor surface (ceiling surface),

Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
FIG. 1 shows a state in which the telescopic device P1 is stretched between a pair of left and right wall surfaces W facing each other in the left-right direction.
In FIG. 1, 1 is a cylindrical outer pipe, 2 is a cylindrical inner pipe having an inner diameter smaller than that of the outer pipe 1 inserted into the outer pipe 1, and 3 fixes the inner pipe 2 to the outer pipe 1. Fixing means 4 is a first receiving part provided at the end of the inner pipe 2 on the wall W side, 5 is a second receiving part provided at an end of the outer pipe 1 on the wall W side, and 6 is a receiving part. The expansion members P1 according to the present embodiment and the expansion device P2 shown in FIG. 11 are attached to the portions 4 and 5 and the wall surfaces W and W, respectively, and include the outer pipe 1, the inner pipe 2, and the fixing means. 3, the receiving portions 4 and 5 and the contact members 6 and 6 are main constituent members, but the receiving portions 4 and 5 and the contact members 6 and 6 may be integrated.

  First, the telescopic device P1 attached between the wall surfaces W shown in FIG. 1 has an outer pipe 1 and an inner pipe 2 in which the inner pipe 2 is movably inserted into the outer pipe 1 and connected. In addition, fixing means 3 for fixing the inner pipe to the outer pipe 1 is provided at the insertion end portion of the inner pipe 2 and the connection side end portion of the outer pipe 1.

  The opposing wall surfaces W generally do not indicate only a pair of vertical wall surfaces that are erected from the floor surface, but column surfaces and wall surfaces that are erected from the floor surface, or column surfaces and column surfaces, Includes the relationship between the floor surface W1 and the ceiling surface W1, as shown in FIG.

  The outer pipe 1 and the inner pipe 2 are generally formed of a metal such as iron, steel, stainless steel, and aluminum into a pipe shape. A combination of these metals or the surface of the pipe is synthesized. What was coat | covered with resin etc., and a hard synthetic resin etc. depending on the case may be sufficient, and can be used suitably according to required length and intensity | strength. Further, the outer pipe 1 and the inner pipe 2 are preferably cylindrical, but may be oval or rectangular.

  As shown in FIGS. 2 and 3 (a), (b), the fixing means 3 is means for preventing the movement of the pipes 1, 2 in the longitudinal direction by relative rotation of the pipes 1, 2. A stopper member 10 made of rubber or synthetic resin having a main body portion 11 inserted into the insertion side end portion of the inner pipe 2 and partially protruding outward in the axial direction, and a shaft of the main body portion 11 of the stopper member 10 A ring-shaped body made of rubber, synthetic resin, or the like that enters the groove portion 12 that gradually becomes deeper in the circumferential direction at a substantially central portion in the direction and that is partially opened in the circumferential direction and is fixed to the inner circumferential surface of the outer pipe 1 14 and one end on the open side of the ring-shaped body 14, projecting toward the groove part in order to move from the state positioned on the deepest groove part side to the shallow groove part side and receive the pressing force from the groove part 12 It is comprised from the protrusion part 15 which does. The stopper member 10 has a columnar insertion portion 13 to be inserted into the insertion side end portion of the inner pipe 2, a diameter slightly larger than the outer diameter of the insertion portion 13, and the inner diameter of the outer pipe 1. The main body portion 11 is configured to have a smaller diameter, and the groove portion 12 is formed at a substantially central portion in the axial direction of the main body portion 11. Therefore, for example, by rotating the outer pipe 1 (the inner pipe 2 or the inner and outer pipes 1 and 2 may be rotated relative to each other), the projecting portion of the ring-shaped body 14 positioned at the deepest portion of the groove portion 12. 3 moves from the deepest part toward the shallowest part, the ring-shaped body 14 is in a state of being bitten between the outer pipe and the stopper member 10, and when the outer pipe 1 is further rotated, FIG. As shown in b), the biting force increases and both pipes 1 and 2 can be fixed. In this way, with the inner and outer pipes held in the extended state, that is, without changing the hand, just rotating at least one of the inner pipe and the outer pipe (does not exceed one rotation). ) Since both pipes can be fixed, the fixing work of both pipes is further facilitated. By constructing the stopper member 10 from an internal hollow cylindrical body, the stopper member 10 can be easily deformed, so that the ring-shaped body 14 can easily bite between the outer pipe and the stopper member 10. May be reliably fixed with a small operating force.

  By forming the groove portion 12 so as to gradually become deeper in the circumferential direction, as shown in FIGS. 3A and 3B, a step portion 12A is formed at the boundary portion between the deepest portion and the shallowest portion of the groove portion 12. The stepped portion 12A and the open end surface 15A of the projecting portion 15 are in contact with each other, and the pipes 1 and 2 are rotated only in directions away from the state shown in FIG. In this case, the rotation direction to be fixed is immediately known. Further, the protruding portion 15 may be configured to bite into the groove portion 12, or the protruding portion 15 may be omitted and the groove portion 12 may be bitten into the ring-shaped body 14.

  It can also be implemented with a second fixing means 16 different from the fixing means 3. That is, as shown in FIG. 4, the second fixing means 16 is fitted to one end of the outer pipe 1 and at the same time is fixed by an adhesive or welding, and extends to the upper side of the inner pipe 2. And a cylindrical joint 16B provided with a screw part 17 formed in a direction perpendicular to the axial direction provided in the extending part 16A of the joint 16B and then pressed against the outer surface of the inner pipe 2 or The pipes 1 and 2 are fixed to each other by being screwed into the inner pipe 2 so that the pipes 1 and 2 can be securely fixed. The joint 16B includes a fixed portion having an inner diameter dimension that can be fitted onto the outer pipe 1, and an extending portion 16A extending from the fixed portion to the upper side of the inner pipe 2. The inner diameter dimension of the extending portion 16A is set to the outer pipe. The diameter is smaller than the inner diameter of 1.

  As shown in FIG. 5, the first receiving portion 4 is formed of a cylindrical member having a partition portion 43 in the middle portion in the longitudinal direction (the center portion in the figure), and the wall surface W side with the partition portion 43 interposed therebetween. The abutting member 6 is inserted into a small-diameter cylindrical portion 47 located at a position, and one end of the inner pipe 2 is inserted into the internal space 42 of the large-diameter cylindrical portion 41 that is spaced from the wall surface W with the partition portion 43 interposed therebetween. Between the inserted inner pipe 2 and the partition portion 43, a coil spring 25 is provided as an elastic body for moving and biasing the abutting member 6 in a direction protruding toward the wall surface W with respect to the inner pipe 2. ing. The cylindrical part 41 constitutes a support part that movably supports the inner pipe 2, and the support part 41 is provided in a state of projecting inwardly at the pipe insertion end of the first receiving part 4. It is comprised from the flange part 41F which contacts an outer surface.

Further, a pressing portion 21 for pressing the partition portion 43 is provided at the receiving portion side end of the inner pipe 2, and the pressing portion 21 passes through a through hole 44 formed at the center of the partition portion 43 at the center thereof. A shaft portion 23 movable in a space S formed on the contact member 6 side of the first receiving portion 4 is provided in a state of projecting to the contact member 6 side, and the coil spring 25 is connected to the partition portion on the shaft portion 23. 43 and the pressing part 21 are packaged in a compressed state. The pressing portion 21 includes a main body portion 24 that is inserted into the receiving portion side end of the inner pipe 2, and the shaft portion 23 that protrudes integrally from the central portion of the main body portion 24.

  By providing the pressing portion 21 with an annular recess 24A into which a part of the coil spring enters, not only can the coil spring 25 be positioned, but also the dimension of the first receiving portion 4 in the axial direction can be shortened. However, the recess 24A may be omitted.

  A washer 45 having a larger outer diameter than the through hole 44 is applied to the tip of the shaft portion 23 from the side surface of the abutting member 6 of the partition portion 43, and the tip of the screw 46 passed through the washer 45 is a shaft. The shaft portion 23 is prevented from being removed from the through hole 44 by being screwed into and fixed to the screw portion 23 </ b> A formed in the portion 23. Accordingly, the restoring force of the coil spring 25 allows the abutting member 6 to be projected and biased to a predetermined position with respect to the inner pipe 2 as shown in FIG. Then, by moving the inner pipe 2 to the wall surface W side, the coil spring 25 contracts, and by applying a restoring force by the coil spring 25 to the contact member 6, the pressing force by the contact member 6 is applied to the wall surface W side. Will occur.

  An engaging ridge 48 is formed on the outer surface of the cylindrical portion 47 to engage with a circumferential groove 63 formed on the inner surface of the abutting member 6 when the abutting member 6 is fitted on the cylindrical portion 47. Yes. When the cylindrical portion 47 is inserted into the concave portion of the contact member 6 and the tip of the cylindrical portion 47 comes into contact with the bottom surface 62 of the concave portion, the circumferential groove 63 and the engaging protrusion 48 are engaged. Yes. Thereby, the 1st receiving part 4 does not remove | deviate from the contact member 6 carelessly.

  A sheet-like elastic member 61 is provided on the wall surface side of the contact member 6, and is in contact with the wall surface W via the elastic member 61. The elastic member 61 is provided with a large number of engaging projections 61A that engage with the main body of the contact member 6, so that the elastic member 61 is not inadvertently displaced with respect to the main body.

There is provided a screw mechanism N that connects the one abutting member 6 and an end portion of one pipe (outer pipe 1) corresponding to the one abutting member 6 and can adjust the position of both in the axial direction. Will be described with reference to FIG.
In other words, the screw mechanism N has the one end fixed to the abutting member 6 and the second receiving portion as a rotatable and rotatable cylindrical body having a space in which the outer pipe 1 is movably inserted at the other end. 5 and a shaft part 54 that is provided in the second receiving part 5 so as to be integrally rotatable, and that is provided on the pipe 1 side end of the shaft part 54 from the contact member 6 side to the pipe 1 side. And a pressing portion 31 as a screwing member that can be screwed to the male screw material 58 and is fixed to the end portion of the outer pipe 1 and movable in the axial direction as the shaft portion 54 rotates. Yes. The second receiving part 5 has a structure similar to that of the first receiving part 4. That is, the second receiving portion 5 is composed of a rotatable cylindrical member (cylindrical body) having a space in which the outer pipe 1 is movably inserted, and at the end of the cylindrical member 5, The pressing portion 31 is inserted. An abutting member 6 is fitted and attached to the end of the second receiving portion 5 on the wall surface side. A sheet-like elastic member 61 is attached to the wall surface side of the contact member 6 and is in contact with the wall surface W via the elastic member 61.

  The pressing portion 31 is made of a cylindrical member, and has an inner fitting portion fitted into the outer pipe 1 on the wall surface W side thereof, and an outer diameter size of the outer pipe 1 larger than the inner fitting portion. And an annular protrusion 32 that protrudes outward in the axial direction and has the same outer diameter. The step portion formed at the boundary between the annular protrusion 32 and the inner fitting portion prevents the pressing portion 31 from entering the outer pipe 1 more than necessary. Further, on the inner surface on the wall surface side of the pressing portion 31, there is formed a female screw portion 33 into which a male screw material 58 having a screw portion formed on the outer surface can be screwed.

  The receiving portion 5 is formed in a bottomed cylindrical shape having a step portion 53 at a longitudinal intermediate portion where the outer pipe 1 insertion end is opened, and the outer pipe 1 slides from the step portion 53 to the outer pipe 1 insertion end. It is formed in a space 52 for freely fitting, and an opening is formed smaller on the wall surface side than the stepped portion 53. As a result, the pressing portion 31 is prevented from entering deeper than the step portion 53. Further, a shaft portion 54 extending on the shaft at the center in the radial direction is provided on the bottom plate portion 55 of the receiving portion 5 so as to protrude toward the outer pipe 1 side. The shaft portion 54 is covered with a coil spring 56. Further, the free end portion side (the side end separated from the wall surface) of the shaft portion 54 is inserted into a through hole 57 formed at the center of the male screw material 58, As described above, the tip of the screw member 59 is screwed into the screw hole 54A of the shaft portion 54 through the washer 51 to prevent the outer pipe 1 and the shaft portion 54 from coming off. In the present embodiment, the shaft portion 54 and the through hole 57 are formed in a shape having a square cross section, so that the shaft portion 54 does not rotate around the axial direction with respect to the through hole 57. The shapes of the shaft portion 54 and the through hole 57 are not limited to a square shape, and the through hole 57 may be a polygonal shape such as a triangle or a pentagon, or an elliptical shape as long as it does not rotate in the axial direction.

  When the pressing portion 31 configured as described above is made to approach toward the wall surface side of the space 52 of the second receiving portion 5 in a state where the abutting member 6 is in contact with the wall surface W, the coil spring 56 contracts and this contraction occurs. Accordingly, a pressing force is generated on the wall surface W side (see FIG. 7A).

  As described above, since the male screw member 58 of the second receiving portion 5 is screwed with the female screw portion 33 of the pressing portion 31, when the second receiving portion 5 is rotated in the axial direction, the shaft portion 54 is moved. Accordingly, the male screw material 58 is similarly rotated, so that the male screw material 58 can advance and retreat in the length direction with respect to the pressing portion 31. Further, by rotating the second receiving portion 5 from the pressed state of FIG. 7A, the pressing portion 31 moves to the side where the second receiving portion 5 is inserted into the space 52 away from the wall surface. As a result, the pressing force toward the other wall surface W increases, and the reaction force is transmitted to the outer pipe 1 via the inner pipe 2, and the pressing portion together with the outer pipe 1 toward the wall surface W indicated by the arrow in FIG. 31 and the male screw material 58 move, the coil spring 56 further contracts, and the pressing force increases toward the wall surface W in accordance with the contraction. Note that a large number of protrusions 5A along the length direction are formed on the outer surface of the second receiving portion 5 at predetermined intervals in the circumferential direction. Thus, the operator can put his finger between the protrusions 5A when rotating the second receiving portion 5, and can reliably rotate the second receiving portion 5 without sliding.

  Further, the wall surface side portion 5B from the step portion 53 of the second receiving portion 5 is configured as a connecting portion that can be fitted externally through the concave portion of the contact member 6 in the same manner as the first receiving portion 4. . Further, on the outer surface of the connecting portion 5B of the second receiving portion 5, an engaging protrusion 46T is formed along the circumferential direction to engage with the circumferential groove 6A formed in the contact member 6, and the first receiving portion 4 and Similarly, the second receiving portion 5 is also prevented from being inadvertently detached from the contact member 6. A sheet-like elastic member 61 is attached to the wall surface side of the contact member 6 so as to be in contact with the wall surface W via the elastic member 61.

  The fixing means 3 is not limited to the configuration shown in FIG. 2 and FIGS. 3 (a) and 3 (b). For example, the fixing means 3 shown in FIG. 8 is fixed to the inner end of the outer pipe 1 and the conical base portion 2A protruding so as to taper toward the end of the inner pipe 2 on the insertion side of the outer pipe 1. The inner pipe 2 and the cylindrical body 72 having substantially the same diameter. On the surface of the base portion 2A, a male screw that is screwed into a female screw hole 72A formed in the length direction of the cylindrical body 72 is formed, and a screwing start end is provided at one circumferential position (or a plurality of positions) of the cylindrical body 72. A cut 73 along the length direction is formed in a range from the portion to the front of the screwing end. As a result, when the inner pipe 2 is rotated in the direction in which the base portion 2A enters the cylindrical body 72, the cylindrical body 72 is pushed and spread from the screwing start end side thereof, thereby contacting the inner surface of the outer pipe 1. When further rotated, the cylindrical body 72 is brought into pressure contact with the outer pipe 1 via the base 2A, and the outer pipe 1 and the inner pipe 2 are fixed.

  9 (a) and 9 (b), the fixing means 3 has an opening 1K formed in the outer pipe 1 and a pin P whose base end is parallel to the longitudinal direction of the pipe at the opening edge. The lever portion 78 attached in a swingable manner around the rotating shaft core and the outer pipe 1 through the opening 1K by swinging the lever portion 78 from the state shown in FIG. 9A. And an arcuate pressing portion 79 provided in the lever portion 78 to press the inner pipe 2 against the outer pipe 1 (see FIG. 9B).

  Further, as shown in FIG. 10, the fixing means 3 includes an inner surface of the outer pipe 1 and an outer surface of the inner pipe 2 inserted into the outer pipe 1 at a central end spaced from the wall surface side of the outer pipe 1. A wedge member 81 for entering and fixing the gap 80 formed between them in the axial direction, and a support fixed to the outer pipe 1 for supporting the wedge member 81 movably in the axial direction. The member 82 is comprised. The support member 82 is configured in a box shape, and a wedge member 81 is accommodated therein, and an operation portion 81A of the wedge member 81 is projected to the outside of the support member 82 through an opening 83 formed in the support member 82. By moving the operation portion 81A in the length direction of the pipe, it is possible to switch between a fixed position where the pipes 1 and 2 are fixed by entering the gap 80 and a non-fixed position released from the gap 80. It has become. Note that 1T shown in FIG. 9 is a protrusion provided along the circumferential direction provided on the inner surface of the outer pipe 1 in order to maintain the gap 80 between the outer pipe 1 and the inner pipe 2. A plurality may be provided in a continuous state in the direction or at a predetermined interval.

  In the present embodiment, the second receiving portion 5 is attached to the outer pipe 1 side, and the first receiving portion 4 having a different configuration is attached to the inner pipe 2 side. The configuration may be such that the attachment relationship with one pipe is reversed, or the first receiving portion 4 or the second receiving portion 5 is attached to only one pipe.

  Next, the attachment method of the expansion-contraction apparatus P1 shown in FIGS. 1-7 is demonstrated. First, the outer pipe 1 and the inner pipe 2 are each held with one hand and extended in a state of being located between the wall surfaces that are the mounting positions, whereby the contact members 6 and 6 at the left and right ends of the expansion / contraction device P1 are respectively connected to the wall surface W. , W. At this stage, the outer pipe 1 and the inner pipe 2 are not fixed. Subsequently, when the inner pipe 2 is further extended with respect to the outer pipe 1, in the first receiving portion 4, the pressing portion 21 together with the inner pipe 2 moves toward the contact member 6 side of the internal space 42 of the receiving portion 4. Therefore, the coil spring 25 contracts and a pressing force is generated in the direction of the wall surface W by the contraction of the coil spring 25, so that the reaction force is transmitted to the other coil spring 56. Are also distributed in the direction of the wall surface W, and a pressing force is generated. At this time, when the tip of the pressing portion 21 is moved until it abuts against the partition portion 43 of the first receiving portion 4, a pressing force is generated so that the expansion device P1 can be attached between the wall surfaces W without support. If so, the operator can easily recognize and can generate the same pressing force regardless of the operator. Further, a mark or the like may be applied to the inner pipe 2 so that a necessary movement amount can be recognized by appearance.

  When the pressing force is generated in the direction of the wall surface W as described above, by maintaining the state using the fixing means 3, the expansion device P1 can be maintained in a state of being stretched between the wall surfaces W and W. It is like that. That is, by rotating the outer pipe 1 with respect to the inner pipe 2, the protruding portion 15 of the ring-shaped body 14 moves from the deepest portion of the groove portion 12 of the main body portion 11 toward the shallowest portion. At this time, the projecting portion 15 of the ring-shaped body 14 bites into the groove portion 12, so that the ring-shaped body 14 is pressed against the inner wall surface of the outer pipe 1, and when the outer pipe 1 is further rotated, the degree of biting increases. As a result, the outer pipe 1 and the inner pipe 2 can be fixed. That is, if the outer pipe 1 is rotated with respect to the inner pipe 2 while the outer pipe 1 and the inner pipe 2 are gripped with one hand, they are fixed. The telescopic device P1 fixed in the stretched state is not easily dropped. After being fixed once, the fixing means 3 is then released by, for example, fixing the outer pipe 1 and the inner pipe 2 firmly by screwing the fixing screw 18 as the second fixing means. Even if there exists, there exists an advantage which can maintain the state which the expansion-contraction apparatus P1 does not fall.

  In order to attach the expansion / contraction device P1 fixed between the wall surfaces W and W more firmly between the wall surfaces W and W as described above, the pressing portion 31 is rotated by rotating the second receiving portion 5. The male screw member 58 is rotated together. The rotational force is converted into a moving force that moves the pressing portion 31 in a non-rotatable state in the axial direction, and the pressing portion 31 moves in a direction opposite to the wall surface W side (a direction away from the wall surface W) (see FIG. 7B). . Along with this, the outer pipe 1 moves toward the other wall surface W by the reaction force received from the other wall surface W, so that the outer pipe 1 moves again toward the one wall surface W (arrow shown in FIG. 7B). The coil spring 56 contracts. Due to the contraction of the coil spring 56, an increased pressing force is generated on both wall surfaces W, W. At this time, since the telescopic device P1 is in a state after being attached between the wall surfaces W, W, the operator can rotate the second receiving portion 5 with both hands as necessary, so that it is conventional. Compared with the case of working with one hand, not only the work is facilitated, but also a larger increased pressing force can be generated on both wall surfaces W, W, so that the expansion device P1 is attached more firmly and stably. There is an advantage that can be. The final pressing force applied by the outer pipe 1 is the maximum pressing force that the expansion / contraction device P1 finally applies between the wall surfaces W and W (the expansion / contraction device P1 causes mechanical damage or the wall surface is broken). In order to avoid exceeding the limit pressing force (so that the pressing force is appropriate), a position where an appropriate pressing force is generated on the outer surface of the outer pipe 1 and a range where a dangerous maximum pressing force is generated. It may be carried out with a scale or mark that can be grasped.

  The first receiving part 4 is not limited to this embodiment. For example, the shaft portion 23 of the pressing portion 21 may be removed, and the coil spring 25 may be interposed between the pressing portion 21 and the partition portion 43, or the partition portion 43 of the first receiving portion 4 may be removed, A coil spring 25 may be attached between the pressing portion 21 and the bottom surface 62 of the contact member 6. In short, when the inner pipe 2 is moved to the contact member 6 side, a pressing force is generated in the wall surface W direction. Any configuration may be used. In addition, it may replace with the coil spring 25, a leaf | plate spring may be sufficient, and elastic bodies, such as rubber | gum other than a V-shaped spring, may be sufficient.

  Further, the second receiving portion 5 is not limited to this embodiment. For example, in the second receiving portion 5, without using the coil spring 56, as shown in FIG. 11, a screw portion is formed on the outer surface of the shaft portion 54, and the screw portion 56 (not shown) of the pressing portion 31 is directly screwed. It may be combined.

  The expansion / contraction device P1 according to the present invention may be used as a second expansion / contraction device P2 configured as a shelf as shown in FIG. This is a combination of a plurality of the telescopic devices P1. Specifically, the second expansion device P2 includes another expansion device P11 in which the receiving portions 4 and 5 and the contact members 6 and 6 provided at both ends are omitted between the two expansion devices P1 and P1. These three expansion devices P1, P11, P1 are connected by two kinds of connecting members 7, 8 at a predetermined interval. Of the connecting members 7 and 8, the connecting members 7 and 7 positioned at both ends include cylindrical portions 7A and 7A penetrating the pipes 1 and 2 on the lower surfaces of both ends in the longitudinal direction of the flat plate portion. The bottomed cylindrical part 7B provided with the recessed part which inserts and fixes both ends of the expansion-contraction apparatus P11 located in the center in the part lower surface is provided. Each of the connecting members 8 located in the intermediate portion includes three cylindrical portions 8A, 8A, 8A that penetrate and support the three expansion devices P1, P11, P1 at a predetermined interval on the lower surface of the flat plate portion. Yes. 12 shown in FIG. 12 is the fixing means provided in the expansion / contraction device P11 located at the center. Reference numeral 16 denotes a second fixing means, in which screw holes (not shown) are formed in the cylindrical portions 8A and 8A located on both sides fixed to the outer pipe 1, and fixing screws 18 are formed in these screw holes. Can be fixed by screwing each of them into contact with or penetrating the inner pipe 2.

  What is necessary is just to implement in the same procedure as the time of attaching the expansion-contraction apparatus P1, when attaching the expansion-contraction apparatus P2 comprised as mentioned above between the wall surfaces W and W. FIG. That is, first, in the state located between the wall surfaces W and W as the mounting position, for example, the outer pipe 1 and the inner pipe 2 of the expansion / contraction apparatus 11 located in the center are each held and extended by one hand, thereby extending / contracting apparatus P1. The abutting members 6 and 6 at both left and right ends of the abutting surfaces are brought into contact with the wall surfaces W and W, respectively. At this stage, the outer pipe 1 and the inner pipe 2 are not fixed. Subsequently, when the inner pipe 2 is further extended with respect to the outer pipe 1, the pressing portion 21 is first moved together with the inner pipe 2 in the first receiving portions 4 of the telescopic devices P <b> 1 and P <b> 1 located on both sides. Since the coil spring 25 contracts because the inner space 42 of the receiving portion 4 moves toward the contact member 6, a pressing force is generated in the wall surface W direction due to the contraction of the coil spring 25, and the other coil spring receives the reaction force. 56 also contracts to generate a pressing force distributed on both wall surfaces W and W. In this state, by rotating the outer pipe 1 with respect to the inner pipe 2, both the pipes 1 and 2 can be fixed and the telescopic device P2 can be supported while being stretched between the wall surfaces W and W. ing. Since the subsequent attachment method is the same as that of the expansion / contraction apparatus P1, description is abbreviate | omitted.

  In the telescopic device P2 according to the present embodiment, the three telescopic devices P1, P11, and P1 are used. However, the number of the telescopic devices P1 may be two or four or more, and a plurality is used as necessary. be able to. Further, the fixing means 3, the first receiving portion 4, the second receiving portion 5, the contact members 6, 6 and the like may be provided in all of the three expansion devices P1, P11, P1, or the expansion and contraction. When attaching the device P2 between the wall surfaces W, a telescopic device P1 in which one or a plurality of the members are omitted may be used in combination as long as no trouble occurs. Furthermore, you may mount two types of shelf boards A and B on the expansion-contraction apparatus P1, P11, P1. In the present embodiment, four square shelf boards A made of a number of wires are placed on the upper surface side of the outer pipe 1, and a rectangle made of a number of wires on the upper surface side of the inner pipe 2. It is also possible to carry out by placing one of the shelf boards B in a shape.

  In FIGS. 1-12, although the case where the expansion / contraction apparatus was attached between a pair of left and right wall surfaces W, W was shown, as shown in FIG. 13 as well as the horizontal direction between the wall surfaces facing each other in the horizontal direction, It is also used as a column attached between the floor surface W1 and the ceiling surface W1, and a shelf 19 or a panel is attached between the columns, so that it can be suitably used for storage shelves or partitions. May be.

  12 to 15 (a) and 15 (b), a shelf for storage is spanned between two expansion devices P1 and P1 that are erected on the left and right sides, and these expansion devices P1 and P1 that are erected. The two shelves 19 and 19 are configured. Each of the shelves 19 is a rotary type that is movably fitted on the outer pipe 1 positioned below each of the expansion devices P1 and P1 installed on the left and right sides and can be fixed to the outer pipe 1 at an arbitrary position. A support member 19A having an operation handle 20 and a large number (six in the figure) inserted into recesses as circular holding portions provided at predetermined intervals in the longitudinal direction of the support members 19A and 19A (see FIG. In this case, the pipe material 19B is composed of six pipes, but other configurations may be used. Each pipe member 19B is formed by connecting two pipes 19a and 19b having different diameters so as to be extendable in the longitudinal direction, and expanding and contracting in accordance with the distance between the two expansion devices P1 and P1. The support members 19A and 19A can be inserted.

  In order to configure the shelf for the storage, first, the respective expansion and contraction devices P1 provided with the supporting members 19A and 19A in advance in two places, upper and lower, are fixed between the floor surface W1 and the ceiling surface W1. That is, with the contact member 6 of the outer pipe 1 placed on the floor surface W1, the contact member 6 positioned at the upper end by lifting the inner pipe 2 upward is interposed via the first receiving portion 4 as described above. When the coil spring 25 is pressed against the ceiling surface W1, the coil spring 25 contracts to generate a pressing force in the direction of the wall surface W. The contraction of the coil spring 25 generates a pressing force in the direction of the ceiling surface W1 and receives the reaction force. The other coil spring 56 also contracts to generate a pressing force distributed on both wall surfaces W1, W1. In this state, by rotating the outer pipe 1 with respect to the inner pipe 2, both the pipes 1 and 2 can be fixed, and the telescopic device P1 can be supported while being stretched between the upper and lower wall surfaces W1 and W1. It has become. Since the subsequent attachment method is the same as that of the telescopic device P1 attached to the left and right wall surfaces W, description thereof is omitted. Reference numeral 16 shown in the figure is a second fixing means, and both the pipes 1 and 2 can be firmly fixed by screwing a fixing screw 18 into the joint 16B. In the case where the expansion / contraction device P1 is supported in a state of being stretched between the upper and lower wall surfaces W1, W1, the coil spring 56 provided on the lower side may be omitted and the lower end may not be expanded / contracted.

  When the two telescopic devices P1 and P1 are erected up and down, the height of the left and right support members 19A and 19A is adjusted by rotating the operation handle 20, and then the holding portion of one support member 19A Next, after inserting one end of the pipe material 19B slightly shorter than the distance between the expansion devices P1 and P1, the other end is extended and inserted into the holding portion of the other support member 19A. When the insertion work is completed, the installation work is completed.

Claims (9)

A telescopic device interposed between a pair of left and right walls or a pair of upper and lower walls facing each other in the left-right direction or the up-down direction, an outer pipe whose one end is in contact with the one wall surface, and the other end side of the outer pipe One end side is inserted so as to be movable in the longitudinal direction, and the other end side is provided with an inner pipe having a smaller diameter than the outer pipe abutting against the other wall surface, and a wall surface side end of at least one of these two pipes. And an abutting member that abuts against the wall surface, and an elastic body provided between the corresponding abutting member and the pipe in order to move and urge the abutting member toward the wall surface side with respect to the pipe, A first fixing means provided between the inner pipe and the outer pipe, the first fixing means for preventing the longitudinal movement of both pipes by a radial pressing force generated between the two pipes due to the relative rotation of both pipes ;
A second fixing means having a fixing screw for fixing the inner pipe and the outer pipe by screwing;
An end of one of the two pipes on the wall surface side is movably inserted, and is a cylindrical body that is rotatable with respect to the one pipe. A telescopic device comprising a cylindrical body that is movable in a direction . The first fixing means includes a groove that gradually becomes deeper along the circumferential direction of the inner pipe at the insertion side end thereof, a ring-shaped body that enters the groove and is partially opened in the circumferential direction, It is provided at one end on the open side of the ring-shaped body, and includes a protruding portion that protrudes toward the groove portion in order to move from the state positioned on the deepest groove portion side to the shallow groove portion side and receive a pressing force from the groove portion. The expansion / contraction apparatus according to claim 1. Before Stories second fastening means includes a cylindrical joint having an extended portion extending above the pipe while being outside fitted to one end of the outer pipe was allowed with the extending portion of the joint elastic means of the screw portion comprising a fixing screw for fixing the two pipes by screwing the pressure or inner pipe from screwed to the outer surface of the inner pipe according to claim 1 or 2, wherein. The abutting member is externally fitted to one end of a cylindrical receiving portion having a partition portion at the intermediate portion, and the pipe corresponding to the abutting member is movably supported on the other end of the receiving portion. A support part, and a pressing part for pressing the partition part at the receiving part side end of the pipe, the pressing part contacting the receiving part through a through hole formed in the partition part at the center part thereof A shaft portion movable in a space formed on the member side is provided in a state of protruding toward the contact member side, and a coil spring constituting the elastic body is compressed between the partition portion and the pressing portion on the shaft portion. The expansion and contraction device according to claim 1, wherein the expansion and contraction device is packaged in a closed state.   The expansion / contraction device according to claim 4, wherein the pressing portion includes an annular recess into which a part of the coil spring enters.   The expansion / contraction apparatus according to claim 4, wherein the support portion includes a flange portion that is provided in a state of projecting inwardly at a pipe insertion end of the receiving portion and contacts an outer surface of the pipe. The pipes are provided with the abutting member and the elastic body at the wall surface side ends of the pipes, and connect the one abutting member and the end of one pipe corresponding to the one abutting position. The telescopic device according to claim 1, further comprising a screw mechanism that is adjustable in an axial direction. The cylindrical body is configured to include a space in which one end is fixed to the one abutting member and one pipe is movably inserted in the other end, and the screw mechanism includes the cylindrical body and The cylindrical body is provided so as to be integrally rotatable, and can be screwed into a shaft portion from the contact member side toward the pipe side and a screw member provided at the pipe side end of the shaft portion, and the one The expansion and contraction device according to claim 7, comprising a screwing member fixed to an end of the pipe and movable in the axial direction as the shaft rotates. A method of interposing between a pair of left and right walls or a pair of upper and lower walls facing each other in the left-right direction or the up-down direction by the expansion and contraction device according to any one of claims 1 to 8,
Stretching both pipes between a pair of wall surfaces, bringing one end side of the outer pipe into contact with one wall surface, and bringing the other end side of the inner pipe into contact with the other wall surface;
By further extending the other pipe with respect to one pipe and contracting the elastic body interposed between the abutting member and the pipe corresponding to the corresponding contacting member, by the biasing force of the elastic body accompanying the contraction, Urging the contact member in a direction protruding toward the wall surface with respect to the pipe corresponding to the contact member, and stretching both pipes between the pair of wall surfaces;
In a state where both pipes are stretched between a pair of wall surfaces, the pipes are relatively rotated, and the radial pressing force generated between the pipes prevents the longitudinal movement of both pipes;
Fixing both pipes by screwing with fixing screws;
A step of rotating the cylindrical body to adjust the pressing force applied between the pair of wall surfaces by moving the pipe having the wall-side end inserted into the cylindrical body in the axial direction; An intervention method.

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