WO2021224983A1

WO2021224983A1 - Strut structure

Info

Publication number: WO2021224983A1
Application number: PCT/JP2020/018644
Authority: WO
Inventors: 一紘竹内; 理保子石橋; 隆久上田
Original assignee: 平安伸銅工業株式会社
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-11-11
Also published as: JPWO2021224983A1; JP6957073B1

Abstract

A strut structure provided with: a first tubular section that has a first end and a second end; a second tubular section that has a third end and a fourth end and of which at least a portion including the third end can be accommodated inside the first tubular section; and a joint section that restricts the movement of the second tubular section with respect to the first tubular section in a first direction. The joint section comprises: a sleeve part, which has a threaded hole in which a threaded groove is formed and that passes therethrough in a second direction perpendicular to the first direction and which is installed on the outer circumferential surface of the first tubular section; and a screw installed in the sleeve part. The screw comprises a shaft and a head. The shaft comprises: a first region, which comprises the inward tip of the shaft and the cross-sectional area of a cross-section perpendicular to the second direction decreases towards the tip; a second region, which is disposed adjacent to the first region and has an outer circumferential surface that runs along the second direction; and a third region, which is disposed adjacent to the second region between the second region and the head and on the outer circumferential surface of which thread ridges for engaging with the threaded groove are formed.

Description

Strut structure

This disclosure relates to a strut structure.

A tension rod attached between two opposing wall surfaces is disclosed (see, for example, Patent Document 1).

Jitsuzensho 61-166208

The tension rod includes a first cylindrical portion and a second tubular portion in which a part thereof is housed on the inner peripheral side of the first tubular portion. After adjusting the length of the second tubular portion pulled out from the inner peripheral side of the first tubular portion and determining the length in the overall longitudinal direction, the second tubular portion with respect to the first tubular portion. Regulate the movement of the tubular part in the longitudinal direction. According to Patent Document 1, the screw is rotated and pushed in the direction from the outer peripheral side to the inner peripheral side, and the shaft portion of the screw is passed through the second cylindrical portion. In this way, the second tubular portion is fixed to the first tubular portion. Easy adjustment of the length of the tension rod in the longitudinal direction is required.

Therefore, one of the purposes is to provide a strut structure capable of easily adjusting the length in the longitudinal direction.

The tension structure according to the present disclosure is attached while maintaining tension between two opposing surfaces. The strut structure is tubular with a first tubular portion having a first end and a second end located opposite the first end in the longitudinal direction with respect to the first end. , Cylindrical, having a fourth end located on the opposite side of the first direction with respect to the third end and the third end, and a region including at least the third end is the first cylinder. A second tubular portion that can be accommodated on the inner peripheral side of the shaped portion and a second tubular portion that is attached to the first tubular portion and restricts the movement of the second tubular portion with respect to the first tubular portion in the first direction. It is provided with a joint portion to be used. The joint portion has a threaded groove formed therein, has a screw hole penetrating in a second direction perpendicular to the first direction, and has a sleeve portion attached to the outer peripheral surface of the first cylindrical portion and a sleeve portion in the first direction. Includes a screw, which is movable in a second direction perpendicular to the sleeve and is attached to the sleeve. The screw includes a shaft portion extending along a second direction and a head portion attached to an outer peripheral end portion of the shaft portion. The shaft portion includes the tip portion on the inner peripheral side of the shaft portion, and is arranged in succession with the first region and the first region in which the cross-sectional area of the cross section perpendicular to the second direction becomes smaller toward the tip portion. A second region having an outer peripheral surface along the second direction, a second region connected to the second region and arranged between the second region and the head, and a thread formed on the outer peripheral surface to engage with a thread groove. Includes 3 regions.

According to the above-mentioned tension structure, the length in the longitudinal direction can be easily adjusted.

FIG. 1 is an external view showing the configuration of the tension rod according to the first embodiment. FIG. 2 is a cross-sectional view of the tension rod shown in FIG. FIG. 3 is an exploded cross-sectional view of the tension rod shown in FIG. FIG. 4 is a perspective view of the appearance of the tension rod shown in FIG. FIG. 5 is a perspective view of the appearance of the tension rod shown in FIG. FIG. 6 is a schematic perspective view of the sleeve portion. FIG. 7 is an external view of the sleeve portion shown in FIG. 6 as viewed in the first direction. FIG. 8 is a schematic cross-sectional view of the sleeve portion when cut by the line segment VIII-VIII in FIG. 7. It is a schematic perspective view of a screw and a rod-shaped part included in a joint part. FIG. 10 is an external view of the screw and rod-shaped portion shown in FIG. 9 as viewed in the second direction. FIG. 11 is a schematic cross-sectional view of a screw and a rod-shaped portion when cut by the line segment XI-XI in FIG. FIG. 12 is an enlarged schematic cross-sectional view showing a part of the tension rod in the state before pushing the screw. FIG. 13 is a schematic cross-sectional view showing an enlarged part of a tension rod in a state after the screw is pushed forward. FIG. 14 is a front view showing a tension rod as a tension structure according to the second embodiment. FIG. 15 is a perspective view of the appearance of the tension rod shown in FIG. FIG. 16 is a perspective view of the appearance of the tension rod shown in FIG. FIG. 17 is a schematic perspective view showing a tension shelf as a tension structure according to the third embodiment.

[Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described. The tension structure according to the present disclosure is attached while maintaining tension between two opposing surfaces. The strut structure is tubular with a first tubular portion having a first end and a second end located opposite the first end in the longitudinal direction with respect to the first end. , Cylindrical, having a fourth end located on the opposite side of the first direction with respect to the third end and the third end, and a region including at least the third end is the first cylinder. A second tubular portion that can be accommodated on the inner peripheral side of the shaped portion and a second tubular portion that is attached to the first tubular portion and restricts the movement of the second tubular portion with respect to the first tubular portion in the first direction. It is provided with a joint portion to be used. The joint portion has a threaded groove formed therein, has a screw hole penetrating in a second direction perpendicular to the first direction, and has a sleeve portion attached to the outer peripheral surface of the first cylindrical portion and a sleeve portion in the first direction. Includes a screw, which is movable in a second direction perpendicular to the sleeve and is attached to the sleeve. The screw includes a shaft portion extending along a second direction and a head portion attached to an outer peripheral end portion of the shaft portion. The shaft portion includes the tip portion on the inner peripheral side of the shaft portion, and is arranged in succession with the first region and the first region in which the cross-sectional area of the cross section perpendicular to the second direction becomes smaller toward the tip portion. A second region having an outer peripheral surface along the second direction, a second region connected to the second region and arranged between the second region and the head, and a thread formed on the outer peripheral surface to engage with a thread groove. Includes 3 regions.

In the tension structure, the second tubular portion is pulled out by a predetermined length from the inner peripheral side of the first tubular portion, and the desired length is set according to the distance between the two opposing surfaces. Then, the screw included in the joint portion is rotated to push the shaft portion in the second direction perpendicular to the first direction, and the shaft portion of the screw is passed through the second cylindrical portion, whereby the first cylinder is formed. The second tubular portion is fixed to the shaped portion. In this way, the movement of the second tubular portion with respect to the first tubular portion in the first direction is restricted. The tension structure having a fixed length in the first direction is attached while maintaining tension between two opposing surfaces.

According to the tension structure of the present disclosure, the shaft portion has a first region including the tip portion on the inner peripheral side of the shaft portion, a second region arranged in series with the first region, and a second region in continuous with the second region. Includes a third region located between the two regions and the head. In the first region, the cross-sectional area of the cross section perpendicular to the second direction becomes smaller toward the tip portion. Therefore, when the screw is rotated to push the shaft portion toward the inner peripheral side and the first region is pierced into the second tubular portion, the tip portion can be easily pierced into the outer peripheral surface of the second tubular portion. .. The second region has an outer peripheral surface along the second direction. Therefore, when a hole is made in the outer peripheral surface of the second cylindrical portion by the tip portion of the shaft portion and the shaft portion is pushed toward the inner peripheral side, the resistance at the position where the second region is arranged can be reduced. can. Therefore, the force for pushing the shaft portion toward the inner peripheral side can be reduced. The third region has a thread on the outer peripheral surface that engages the thread groove. Therefore, when the screw is rotating, the thread in the third region and the thread groove of the screw hole included in the sleeve portion can be engaged with each other to smoothly advance and retract the shaft portion in the second direction. Further, the engagement between the screw thread and the thread groove can prevent the screw from falling off from the sleeve portion. Therefore, the length of such a tension structure can be easily adjusted in the longitudinal direction.

In the above-mentioned tension structure, the joint portion may further include a rod-shaped portion. One end of the rod-shaped portion may be fixed to the head. By doing so, the screw can be rotated by holding the other end of the rod-shaped portion that is in a free state. Therefore, the screw can be easily rotated, and the screw can be pushed forward or regressed more easily when adjusting the length.

In the above-mentioned tension structure, the rod-shaped portion may be arranged along the first direction in a state where the movement of the second tubular portion with respect to the first tubular portion is restricted. By doing so, the rod-shaped portion can be brought along the outer peripheral surface of the first tubular portion in a state where the movement of the second tubular portion is restricted. Therefore, it is possible to prevent the other end of the rod-shaped portion from intersecting in the first direction and protruding from the outer peripheral surface of the first tubular portion. In addition, it can be easily and visually recognized that the movement of the second tubular portion with respect to the first tubular portion is restricted.

The tension structure may further include an elastic member arranged so as to make the pressure of the tension structure variable in the first direction. By doing so, it becomes easy to attach the tension structure between two facing surfaces while maintaining the tension in the first direction by utilizing the elastic deformation by the elastic member. Therefore, the strut structure can be more easily attached between the two surfaces.

In the above-mentioned tension structure, the length of the second region in the second direction may be larger than the wall thickness of the first tubular portion. By doing so, the screw can be pushed smoothly in the second region where the screw thread is not provided more reliably. Therefore, the length in the longitudinal direction can be easily adjusted more reliably.

In the above-mentioned tension structure, the length of the second region in the second direction may be 2.0 mm or more and 8.0 mm or less. Such a tension structure can more reliably push the screw smoothly. The length in the longitudinal direction can be easily adjusted more reliably.

In the above-mentioned tension structure, the sleeve portion may be cylindrical. By doing so, it is possible to reduce the possibility that the sleeve portion will fall off from the first cylindrical portion. Therefore, the length in the longitudinal direction can be easily adjusted more reliably.

In the above-mentioned tension structure, the material of the second cylindrical portion may be iron. By doing so, it is possible to easily adjust the length in the longitudinal direction in the tension structure having high rigidity.

[Details of Embodiments of the present invention]
Next, an embodiment of the tension structure of the present disclosure will be described with reference to the drawings. In the following drawings, the same or corresponding parts are designated by the same reference numerals, and the description thereof will not be repeated.

(Embodiment 1)
The configuration of the tension rod which is a kind of the tension structure in the first embodiment of the present disclosure will be described. FIG. 1 is an external view showing the configuration of the tension rod according to the first embodiment. FIG. 1 is a side view of the appearance of the tension rod according to the first embodiment. FIG. 2 is a cross-sectional view of the tension rod shown in FIG. In FIG. 2, two opposing wall surfaces to which the tension rods are attached are also shown. FIG. 2 is a cross-sectional view when the first cylindrical portion 14a, which will be described later, passes through the central axis of the first cylindrical portion 14a and is cut along a plane along the longitudinal direction of the first cylindrical portion 14a. FIG. 3 is an exploded cross-sectional view of the tension rod shown in FIG. 4 and 5 are perspective views of the appearance of the tension rod shown in FIG. 1, respectively. 4 and 5 are views viewed from different angles.

With reference to FIGS. 1 to 5, the first direction is the longitudinal direction of the spur 11a in the first embodiment are indicated by the orientation or reverse orientation that indicated by the arrow D _1. The tension rod 11a is attached to the two opposing surfaces, specifically, the first wall surface 12 and the second wall surface 13 facing the first wall surface 12 while maintaining tension (see particularly FIG. 2). ). In this case, the two walls 12 and 13 is opposed to the direction indicated by the arrow _{D 1.} In FIG. 2, a direction perpendicular to the first direction, indicated by the orientation or reverse orientation that indicated by the arrow D _2. In FIG. 2, the _{direction indicated by the arrow D 2} indicates the direction from heaven to earth. For example, a hanger or a hook is hooked by using the tension rod 11a attached between the wall surfaces 12 and 13. Further, a curtain rail can be attached to the tension rod 11a and used for opening and closing the curtain. In addition, it is installed in a state where tension is maintained between the top wall of the ceiling and the surface of the furniture such as a chest of drawers located on the ceiling side with the longitudinal direction as the vertical direction in the first direction, to prevent the furniture from tipping over. It can also be used as a tool. In addition, it can be attached between the ceiling wall surface and the floor surface while maintaining tension, and can be used as a support.

The tension rod 11a includes a first cylindrical portion 14a having a cylindrical shape, a first contact portion 15a that comes into contact with the first wall surface 12 at the time of attachment, and a second tubular portion 16a having a cylindrical shape. A second contact portion 17a and a joint portion 18a that come into contact with the second wall surface 13 at the time of mounting are provided.

The first tubular portion 14a has a cylindrical shape. As the length in the first direction, which is the longitudinal direction of the first tubular portion 14a, for example, one having a length of 300 mm or more and 1600 mm or less is used. Specifically, those having a thickness of 390 mm or more and 1540 mm or less are used. As the inner diameter of the first cylindrical portion 14a, for example, one having a diameter of 20.0 mm or more and 32.0 mm or less is used. Specifically, those having a diameter of 21.0 mm or more and 31.8 mm or less are used. As the outer diameter of the first cylindrical portion 14a, for example, one having a diameter of 22.0 mm or more and 35.0 mm or less is used. Specifically, those having a diameter of 22.2 mm or more and 33.5 mm or less are used. The wall thickness of the first tubular portion 14a, that is, the radial length from the outer peripheral surface 21a to the inner peripheral surface 22a of the first tubular portion 14a is, for example, 0.3 mm or more and 2.0 mm or less. Used. Specifically, those having a diameter of 0.4 mm or more and 1.0 mm or less are used. The first cylindrical portion 14a is located on one side in the first direction, and includes a first end portion 23a including an opening on one side of the first tubular portion 14a, a first end portion 23a, and a first. It is located on the opposite side of the direction and has a second end portion 24a including an opening on the other side of the first cylindrical portion 14a. As the material of the first cylindrical portion 14a, for example, iron is used.

The first contact portion 15a includes a case portion 31a, a spring 32a as an elastic member arranged so as to make the pressure in the first direction variable, a first cap 33a, and a first pad 34a. .. The case portion 31a has a cylindrical shape, one end of which is closed, and the other end of which is open. The case portion 31a is formed with a mounting portion 36a formed at a radial interval from the outer peripheral surface 35a at one end. One end of the case portion 31a is inserted from the first end portion 23a side of the first cylindrical portion 14a. At this time, the first end portion 23a is fitted into the radial gap between the mounting portion 36a and the outer peripheral surface 35a. In this way, the case portion 31a is attached to the first cylindrical portion 14a.

The spring 32a has a so-called coil shape and can be compressed in the longitudinal direction. When the force when the spring 32a is compressed in the longitudinal direction is released, the spring 32a returns to its original length due to the restoring force. That is, when the spring 32a is compressed in the longitudinal direction, the restoring force of the spring 32a exerts an urging force to return to the original length.

The first cap 33a has a cylindrical portion in which one end is open and the other end is closed. The other end of the case portion 31a is fitted into the inner peripheral side of the opened one end. In this way, the first cap 33a is attached to the case portion 31a. The spring 32a described above is arranged in the space 37a surrounded by the inner peripheral surface of the case portion 31a. In this case, the spring 32a is arranged so that the longitudinal direction is along the first direction. The spring 32a is arranged in the space 37a in a state of natural length in the longitudinal direction, that is, in a state of not being compressed in the longitudinal direction. That is, the spring 32a is arranged so as to make the pressure of the tension rod 11a variable in the first direction by elastic deformation.

The first pad 34a is attached to the first cap 33a on the side opposite to the side in which the case portion 31a is fitted in the longitudinal direction. In the present embodiment, the first pad 34a has a plate shape, and the outer shape when viewed in the thickness direction, that is, the first direction is square. In the present embodiment, when viewed in the first direction, the corners of the four corners of the first pad 34a are chamfered and rounded. The first pad 34a has a surface 38a on one side in the thickness direction facing the first wall surface 12 at the time of attachment. That is, when the tension rod 11a is used, the first wall surface 12 and the surface 38a come into contact with each other.

The second tubular portion 16a has a cylindrical shape. As the length in the first direction, which is the longitudinal direction of the second tubular portion 16a, for example, one having a length of 400 mm or more and 1700 mm or less is used. Specifically, those having a diameter of 440 mm or more and 1600 mm or less are used. As the inner diameter of the second tubular portion 16a, for example, one having a diameter of 15.0 mm or more and 30.0 mm or less is used. Specifically, one having a thickness of 17.8 mm or more and 27.8 mm or less is used. As the outer diameter of the second cylindrical portion 16a, for example, one having a diameter of 15.0 mm or more and 32.0 mm or less is used. Specifically, one having a thickness of 19.0 mm or more and 29.5 mm or less is used. The thickness of the second tubular portion 16a, that is, the radial length from the outer peripheral surface 26a to the inner peripheral surface 27a of the second tubular portion 16a, is, for example, 0.3 mm or more and 2.0 mm or less. Used. Specifically, those having a diameter of 0.4 mm or more and 1.0 mm or less are used. The thickness of the second cylindrical portion 16a is represented by a length L ₃ in FIG. The second cylindrical portion 16a is located on one side in the first direction, and has a third end portion 28a including an opening on one side of the second tubular portion 16a and a third end portion 28a with respect to the third end portion 28a. It is located on the opposite side of the direction 1 and has a fourth end 29a, including an opening on the other side of the second cylindrical portion 16a. The second cylindrical portion 16a can accommodate a region including the third end portion 28a on the inner peripheral side of the first tubular portion 14a. In the present embodiment, the tension rod 11a pulls out the second tubular portion 16a from the inner peripheral side of the first tubular portion 14a by a predetermined length, and makes the distance between the two opposing wall surfaces 12 and 13. Used as the desired length depending. As the material of the second tubular portion 16a, for example, iron is used as in the case of the first tubular portion 14a.

The second contact portion 17a includes a first jack portion 41a, a second jack portion 42a, a second cap 43a, and a second pad 44a. The first jack portion 41a has a cylindrical shape, includes an opening on the other side, does not have a screw formed on the outer peripheral surface, and has a smooth cylindrical surface, and an opening on one side. The second fitting portion 46a, which has a thread (male thread) formed on the outer peripheral surface thereof, is included. The first jack portion 41a is formed by inserting the first fitting portion 45a into the second tubular portion 16a from the fourth end portion 29a side of the second tubular portion 16a and crimping the fourth end portion 29a. , Attached to the second tubular portion 16a.

The second jack portion 42a has a cylindrical shape. In the region near one end of the second jack portion 42a, a plurality of ribs 49a extending in a rod shape so as to connect the inner peripheral surfaces are provided. In the present embodiment, three ribs 49a are provided and are formed radially at intervals of 60 degrees in the circumferential direction. Note that FIG. 3 is a cross section when cut with a cross section including the rib 49a. A third fitting portion 47a provided with a thread groove (female screw) is formed on the inner peripheral surface extending from the position where the rib 49a is provided to the central region in the longitudinal direction of the second jack portion 42a. The second jack portion 42a is the first by engaging the screw of the second fitting portion 46a with the female screw of the third fitting portion 47a of the second jack portion 42a while rotating the second jack portion 42a. It is attached to the jack portion 41a.

The second cap 43a has a cylindrical portion in which one end is closed and the other end is open. The second jack portion 42a is fitted to the other end of the opening. Specifically, the outer peripheral surface of one end of the second jack portion 42a is fitted into the inner peripheral surface of the second cap 43a. The first cap 33a and the second cap 43a may use members having the same shape.

The second pad 44a is attached to the second cap 43a on the side opposite to the side in which the second jack portion 42a is fitted in the longitudinal direction. In the present embodiment, the second pad 44a has a plate shape, and the outer shape when viewed in the thickness direction, that is, the first direction is square. In the present embodiment, when viewed in the first direction, the corners of the four corners of the second pad 44a are chamfered and rounded. The second pad 44a has a surface 48a on one side in the thickness direction facing the second wall surface 13 at the time of attachment. That is, when the tension rod 11a is used, the second wall surface 13 and the surface 48a come into contact with each other. The first pad 34a and the second pad 44a may use members having the same shape.

The joint portion 18a includes a sleeve portion 51a and a screw 52a. In the present embodiment, the joint portion 18a includes a rod-shaped portion 67a. Next, the configuration of the sleeve portion 51a will be described. FIG. 6 is a schematic perspective view of the sleeve portion 51a. FIG. 7 is an external view of the sleeve portion 51a shown in FIG. 6 as viewed in the first direction. 7, the sleeve portion 51a, a view from a direction indicated by an arrow D _1. FIG. 8 is a schematic cross-sectional view of the sleeve portion 51a when cut along the line segment VIII-VIII in FIG. 7. 6 to 8 are views in a state where the screw 52a included in the joint portion 18a is not shown. In FIG. 6, the nut portion 62a, which will be described later, is not shown.

With reference to FIGS. 6 to 9, the sleeve portion 51a has a cylindrical shape. Specifically, the sleeve portion 51a has a cylindrical shape. The sleeve portion 51a includes an end portion 53a on one side, and is arranged adjacent to a first portion 54a having a large radial thickness and a first portion 54a in the first direction, and has an end portion 55a on the other side. Includes a second portion 56a, which is smaller in radial thickness than the first portion 54a. Further, the sleeve portion 51a includes a protruding portion 58a formed on the outer peripheral surface 57a in the region where the first portion 54a is arranged and projecting to the outer peripheral side. The sleeve portion 51a is such that the outer peripheral surface 21a of the first tubular portion 14a and the inner peripheral surface 60a of the second portion 56a come into contact with each other in the region where the second end portion 24a of the first tubular portion 14a is located. It is fitted and attached. The sleeve portion 51a is attached to the first cylindrical portion 14a so that the second end portion 24a abuts on the step 50a between the inner peripheral surface 59a of the first portion 54a and the inner peripheral surface 60a of the second portion 56a. .. The inner peripheral surface 59a of the first portion 54a is arranged so as to face the outer peripheral surface 26a of the second cylindrical portion 16a. Length in the first direction of the sleeve portion 51a is indicated by the length _{L 1} from the end portion 53a to the end 55a.

The protruding portion 58a has a shape extending in a second direction perpendicular to the first direction. The protruding portion 58a is columnar. The protruding portion 58a is formed with a through hole 61a penetrating in the radial direction of the second tubular portion 16a, that is, in the second direction. The sleeve portion 51a includes a nut portion 62a. The nut portion 62a has a screw groove (female screw) 63a formed therein and has a screw hole 64a penetrating in the second direction. The sleeve portion 51a excluding the nut portion 62a is made of resin. The nut portion 62a is made of metal. Specifically, the nut portion 62a is made of brass. The nut portion 62a is arranged in the through hole 61a. The screw hole 64a of the nut portion 62a fitted in the through hole 61a is arranged so as to penetrate in the second direction which is the radial direction of the second tubular portion 16a. The sleeve portion 51a has a screw groove 63a formed therein and has a screw hole 64a penetrating in the second direction. The screw hole 64a has an opening on the inner peripheral surface 59a.

Next, the configuration of the screw 52a will be described. FIG. 9 is a schematic perspective view of the screw 52a and the rod-shaped portion 67a included in the joint portion 18a. FIG. 10 is an external view of the screw 52a and the rod-shaped portion 67a shown in FIG. 9 as viewed in the second direction. Figure 10 is a view seen from the direction opposite to the direction indicated screws 52a and the rod portion 67a in the arrow D _2. FIG. 11 is a schematic cross-sectional view of the screw 52a and the rod-shaped portion 67a when cut by the line segment XI-XI in FIG.

With reference to FIGS. 9 to 11, the screw 52a includes a shaft portion 65a and a head portion 66a. The shaft portion 65a extends along the second direction. That is, the screw 52a is attached to the sleeve portion 51a so that the shaft portion 65a extends along the second direction. The rotating shaft 70a of the screw 52a shown by the alternate long and short dash line in FIG. 11 passes through the central axis of the shaft portion 65a. The head portion 66a is attached to an end portion on the outer peripheral side, which is an end portion on one side of the shaft portion 65a. The screw 52a is made of metal.

The rod-shaped portion 67a is made of resin. One end 68a of the rod-shaped portion 67a is attached to the head 66a of the screw 52a. Specifically, the head 66a of the screw 52a is fixed so as to be embedded in one end 68a of the resin rod-shaped portion 67a. The other end portion 69a of the rod-shaped portion 67a is in a free state, that is, a state in which the rod-shaped portion 67a is not attached to a member constituting the tension rod 11a. A user who uses the tension rod 11a can rotate the screw 52a by grasping the other end portion 69a of the rod-shaped portion 67a and rotating the rod-shaped portion 67a with the one end portion 68a side as a fulcrum. In the present embodiment, when the longitudinal length of the rod portion 67a and the length L _2, the length L ₁ in the first direction of the sleeve portion 51a is greater than the length L _2. By doing so, the shape of the rod-shaped portion 67a can be made more compact. On the other hand, by making the length L ₂ larger than the length L ₁ , it becomes easy to reduce the force when rotating the screw 52a. The rod-shaped portion 67a is arranged along the first direction in a state where the movement of the second tubular portion 16a with respect to the first tubular portion 14a is restricted.

Here, the shaft portion 65a includes a first region 71a, a second region 72a, and a third region 73a. The first region 71a includes a tip portion 74a on the inner peripheral side of the shaft portion 65a. The second region 72a is arranged so as to be connected to the first region 71a. The second region 72a is arranged between the first region 71a and the third region 73a in the second direction. The third region 73a is arranged so as to be connected to the second region 72a. The third region 73a is arranged between the second region 72a and the head 66a in the second direction. The second region 72a and the third region 73a are arranged between the first region 71a and the head 66a in the second direction. The length of the first region 71a, the length of the second region 72a, and the length of the third region 73a in the second direction are indicated by _{lengths L 4} , L ₅ , and L _{6, respectively.}

In the first region 71a, the cross-sectional area of the cross section perpendicular to the second direction becomes smaller toward the tip portion 74a. The first region 71a has an acute-angled and pointed tip portion 74a. The angle formed by the line 76a and the line 77a forming the outer peripheral surface 75a appearing in the cross section shown in FIG. 11 is an acute angle. The outer peripheral surface 75a of the first region 71a is composed of a conical surface. No threads or grooves are formed on the outer peripheral surface 75a.

The second region 72a has an outer peripheral surface 78a along the second direction. The outer peripheral surface 78a of the second region 72a is composed of a cylindrical surface. No threads or grooves are formed on the outer peripheral surface 78a. In the cross section shown in FIG. 11, the line 79a and the line 81a forming the outer peripheral surface 78a are parallel to each other. It should be noted that the term "parallel" as used herein means not only when the two lines are geometrically strictly parallel to each other, but also, for example, in the second direction, the distance between the two lines is slightly increased toward the first region 71a. Including the case where it is narrowed. _{The length L 5} of the second region 72a in the second direction is larger than the wall thickness of the second tubular portion 16a. Specifically, the length L ₅ is 2.0 mm or more and 8.0 mm or less.

A thread (male thread) 83a that engages with the thread groove 63a is formed on the outer peripheral surface 82a of the third region 73a. The thread 83a is formed over the entire longitudinal direction of the third region 73a. The boundary between the second region 72a and the third region 73a in the second direction is determined by the presence or absence of a thread.

Here, an example of how to attach the tension rod 11a will be briefly described. First, the tension rod 11a shown in FIG. 1 and the like with the screw 52a loosened is prepared. With the screw 52a loosened, the second cylindrical portion 16a on the inner peripheral side of the first tubular portion 14a can be taken in and out. The length of the tension rod 11a in the longitudinal direction can be changed by pulling out the second tubular portion 16a from the inner peripheral side of the first tubular portion 14a in the first direction.

The second tubular portion 16a is pulled out by a predetermined length from the inner peripheral side of the first tubular portion 14a, and has a desired length according to the distance between the two opposing wall surfaces 12, 13. In the present embodiment, the length is the same as between the two wall surfaces 12 and 13, or slightly shorter than the length between the two wall surfaces 12 and 13. Then, the screw 52a included in the joint portion 18a is rotated to push the shaft portion 65a in the second direction perpendicular to the first direction. When rotating the screw 52a, a force is applied by holding the other end portion 69a of the rod-shaped portion 67a to rotate the rotation shaft 70a as the central axis of rotation. Here, the third region 73a of the screw 52a has a thread 83a that engages with the thread groove 63a on the outer peripheral surface 82a. Therefore, the thread 83a of the third region 73a and the thread groove 63a of the screw hole 64a included in the sleeve portion 51a can be engaged with each other to smoothly advance and retract the shaft portion 65a in the second direction. .. By engaging the screw thread 83a with the thread groove 63a, it is possible to prevent the screw 52a from falling off from the sleeve portion 51a.

A screw thread 83a provided on the outer peripheral surface 82a of the third region 73a, and engaged with the screw groove 63a of the screw hole 64a, the rotation of the screw 52a, the shaft portion 65a is an arrow _{D 2} opposite directions It will proceed. FIG. 12 is a schematic cross-sectional view showing a part of the tension rod 11a in a state before pushing the screw 52a in an enlarged manner. Referring to FIG. 12, by rotating the screw 52a, the shaft portion 65a of the screw 52a second direction, specifically, pushes in the direction opposite to the direction shown arrow D _2. Then, the tip portion 74a included in the first region 71a of the shaft portion 65a comes into contact with the outer peripheral surface 26a of the second tubular portion 16a. After that, the tip portion 74a bites into the second tubular portion 16a due to the rotation of the screw 52a.

Here, according to the tension rod 11a, the cross-sectional area of the first region 71a is smaller in the cross section perpendicular to the second direction toward the tip portion 74a. Therefore, when the screw 52a is rotated to push the shaft portion 65a toward the inner peripheral side and the first region 71a is pierced into the second tubular portion 16a, the tip portion 74a is formed on the outer peripheral surface 26a of the second tubular portion 16a. Can be easily pierced. In the present embodiment, the outer peripheral surface 75a of the first region 71a is composed of a conical surface, and the outer peripheral surface 75a is not formed with a thread or a thread groove. Therefore, it is easier to pierce the tip portion 74a. Further, the second region 72a has an outer peripheral surface 78a along the second direction. Therefore, at the position where the second region 72a is arranged when the tip portion 74a of the shaft portion 65a makes a hole in the outer peripheral surface 26a of the second tubular portion 16a and pushes the shaft portion 65a toward the inner circumference side. The resistance can be reduced. Therefore, the force when pushing the shaft portion 65a toward the inner peripheral side can be reduced.

FIG. 13 is a schematic cross-sectional view showing a part of the tension rod 11a in a state after pushing the screw 52a in an enlarged manner. FIG. 13 corresponds to an enlarged view of the portion shown by XIII in FIG. With reference to FIG. 13, by passing the shaft portion 65a of the screw 52a through the second cylindrical portion 16a in this way, the second tubular portion 16a is made with respect to the first cylindrical portion 14a. Fix it. In this way, the movement of the second tubular portion 16a with respect to the first tubular portion 14a in the first direction is restricted. In this case, the movement of the second tubular portion 16a in the circumferential direction with respect to the first tubular portion 14a is also restricted. After that, the tension rod 11a having a determined length in the first direction is attached between the two facing wall surfaces 12 and 13 as shown in FIG.

Here, when the tension rod 11a is attached between the wall surfaces 12 and 13, the tension rod 11a whose length is adjusted in the longitudinal direction according to the length between the two wall surfaces 12 and 13 is the two wall surfaces 12 and 13. Placed in between. After arranging the tension rod 11a between the wall surfaces 12 and 13, the second jack portion 42a is rotated. In this case, the second jack portion 42a is rotated in the direction in which the tension rod 11a becomes longer in the longitudinal direction. Then, the tension rod 11a tries to be elongated in the longitudinal direction, but since it is arranged between the wall surfaces 12 and 13, the spring 32a arranged in the space 37a is compressed in the longitudinal direction. As a result, the tension rod 11a is attached between the wall surfaces 12 and 13 in a state where the tension is maintained by the urging force that the spring 32a tries to return to the natural length. In this way, the tension rod 11a is attached between the two opposing wall surfaces 12, 13.

From the above, the length of such a tension rod 11a can be easily adjusted in the longitudinal direction.

In the present embodiment, the joint portion 18a includes a rod-shaped portion 67a. One end 68a of the rod-shaped portion 67a is fixed to the head 66a. Therefore, the screw 52a can be rotated by holding the other end portion 69a of the rod-shaped portion 67a in the free state. Therefore, the tension rod 11a is a tension rod that can easily rotate the screw 52a and can more easily push forward the screw 52a and regress the screw 52a when adjusting the length.

In the present embodiment, the rod-shaped portion 67a is arranged along the first direction in a state where the movement of the second tubular portion 16a with respect to the first cylindrical portion 14a is restricted. Therefore, in a state where the movement of the second tubular portion 16a is restricted, the rod-shaped portion 67a can be set along the outer peripheral surface 21a of the first tubular portion 14a. Therefore, it is possible to prevent the tension rod 11a from having the other end portion 69a of the rod-shaped portion 67a intersecting in the first direction and protruding from the outer peripheral surface 21a of the first cylindrical portion 14a. It is a tension rod. Further, the tension rod 11a serves as a tension rod that can be easily visually recognized that the movement of the second tubular portion 16a with respect to the first tubular portion 14a is restricted. There is.

In the present embodiment, the length L ₅ of the second region 72a in the second direction is greater than the thickness of the first cylindrical portion 14a. Therefore, the screw 52a can be smoothly pushed forward in the second region 72a where the screw thread 83a is not provided more reliably. Therefore, the tension rod 11a is a tension rod that can more reliably and easily adjust the length in the longitudinal direction.

_{In the present embodiment, the length L 5} of the second region 72a in the second direction is 2.0 mm or more and 8.0 mm or less. Therefore, the screw 52a can be pushed forward more reliably. Therefore, the tension rod 11a is a tension rod that can more reliably and easily adjust the length in the longitudinal direction.

In the present embodiment, the sleeve portion 51a has a cylindrical shape. Therefore, it is possible to reduce the possibility that the sleeve portion 51a will fall off from the first cylindrical portion 14a. Therefore, the tension rod 11a is a tension rod that can more reliably and easily adjust the length in the longitudinal direction.

In the present embodiment, the material of the second cylindrical portion 16a is iron. Therefore, the tension rod 11a is a tension rod having high rigidity, and the length in the longitudinal direction can be easily adjusted.

In the present embodiment, the tension rod 11a includes a spring 32a as an elastic member arranged so as to make the pressure in the first direction variable. Therefore, by utilizing the elastic deformation by the spring 32a, the tension rod 11a can be attached between the two facing wall surfaces 12 and 13 while maintaining the tension in the first direction. Therefore, such a tension rod 11a is a tension rod that can be more reliably attached between the two wall surfaces 12 and 13.

(Embodiment 2)
Next, the second embodiment, which is another embodiment, will be described. FIG. 14 is a front view showing a tension rod as a tension structure according to the second embodiment. 15 and 16 are perspective views of the appearance of the tension rod shown in FIG. 14, respectively. 15 and 16 are views viewed from different angles. The tension rod of the second embodiment is different from the case of the first embodiment in that the shapes of the first contact portion and the second contact portion included in the tension rod of the first embodiment are different.

With reference to FIGS. 14 to 16, the tension rod 11b according to the second embodiment has a first cylindrical portion 14b, a first contact portion 15b, a second tubular portion 16b, and a second tubular portion. The contact portion 17b and the joint portion 18b are included. The configuration of the first cylindrical portion 14b, the second tubular portion 16b, and the joint portion 18b is the same as the configuration of the first tubular portion 14a, the second tubular portion 16a, and the joint portion 18a in the first embodiment. The same is true for each. Therefore, these explanations will be omitted.

In the first contact portion 15b, the first pad 34b has a plate shape, and the outer shape when viewed in the thickness direction is rectangular. In the present embodiment, when viewed in the first direction, the corners of the four corners of the first pad 34b are chamfered and rounded. Further, in the second contact portion 17b, the second pad 44b has a plate shape, and the outer shape when viewed in the thickness direction is rectangular. In the present embodiment, when viewed in the first direction, the corners of the four corners of the second pad 44b are chamfered and rounded.

Such a tension rod 11b is effectively used as a furniture fall prevention tool for preventing furniture from falling, for example. Specifically, the tension rod 11b is attached so that the top-bottom direction is the longitudinal direction. For example, the tension rod 11b is attached so that the surface 38b of the first pad 34b abuts on the top wall surface constituting the ceiling and the surface 48b of the second pad 44b abuts on the surface facing the top wall surface of furniture such as a chest of drawers. .. More specifically, it is installed so that the longitudinal direction of the rectangle is the same as the direction in which the drawer of the chest is pulled out. By attaching in this way, it is possible to prevent the furniture from tipping over in the event of an earthquake or the like.

(Embodiment 3)
Next, the third embodiment, which is still another embodiment, will be described. FIG. 17 is a schematic perspective view showing a tension shelf as a tension structure according to the third embodiment. The tension shelf of the third embodiment is different from the case of the first embodiment in that it includes two parts having the same configuration as the tension rod of the first embodiment and is used as a shelf.

With reference to FIG. 17, the tension shelf 86 in the third embodiment includes two

tension rods

11c and 11d and a net unit 87 arranged between the

tension rods

11a and 11c. The tension rod 11c includes a first cylindrical portion 14c, a first contact portion 15c, a second tubular portion 16c, a second contact portion 17c, and a joint portion 18c. The tension rod 11d includes a first cylindrical portion 14d, a first contact portion 15d, a second tubular portion 16d, a second contact portion 17d, and a joint portion 18d. The configurations of the

tension rods

11c and 11d are basically the same as the configurations of the tension rods 11a in the first embodiment, respectively. Therefore, these explanations will be omitted.

The net unit 87 included in the tension shelf 86 is formed by combining a plurality of rod-shaped members in a grid pattern. In the present embodiment, the net unit 87 is formed by arranging and combining a plurality of rod-shaped members in a first direction and in a direction orthogonal to the first direction. The

tension rods

11c and 11d are arranged so as to be parallel to each other. A net unit 87 is arranged between the

tension rods

11c and 11d. Specifically, the net unit 87 is connected to each of the outer peripheral surface 21c of the first cylindrical portion 14c included in the tension rod 11c and the outer peripheral surface 21d of the first tubular portion 14d included in the tension rod 11d. ing.

In such a tension shelf 86, when two

tension rods

11c and 11d are attached between facing wall surfaces while maintaining tension, an object can be placed on the net unit 87. Further, a hanger or the like can be hooked on the net unit 87 for use.

The length of such a tension shelf 86 can be easily adjusted in the longitudinal direction.

(Other embodiments)
In the above embodiment, the tip of the screw included in the first region is sharp, but the present invention is not limited to this, and the tip of the screw does not have to be sharp, for example, the tip. May be formed by a rounded arcuate surface, or may be cut by a surface perpendicular to the second direction.

Further, in the above embodiment, the joint portion includes the metal nut portion in which the thread groove is formed, but the present invention is not limited to this, and the joint portion is directly screwed to the first portion of the wall thickness. A grooved screw hole may be provided.

In the above embodiment, the joint portion includes the rod-shaped portion, but the present invention is not limited to this, and the joint portion may not include the rod-shaped portion. Further, the joint portion does not have to be cylindrical, and may be attached to the central side in the longitudinal direction from the end portion of the first tubular portion. Further, the joint portion may have a structure that is detachable from the first cylindrical portion.

Further, in the above-described embodiment, the configuration is further provided with an elastic member, but the present invention is not limited to this, and a configuration without an elastic member may be used. Further, regarding the arrangement of the elastic members, for example, they may be arranged on the inner peripheral side of the second tubular portion. Further, the elastic member is not limited to the spring, and may be a rubber-like member.

Further, in the above embodiment, the first tubular portion and the second tubular portion are cylindrical, but the present invention is not limited to this, and other shapes, for example, the outer shape of the cross section is elliptical. It may be a square cylinder or a square cylinder.

It should be understood that the embodiments disclosed this time are examples in all respects and are not restrictive in any respect. The scope of the present invention is not defined as described above, but is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The tension structure of the present disclosure is particularly advantageously applied when easy adjustment of the length in the longitudinal direction is required.

11a, 11b, 11c, 11d Tension rod, 12, 13 wall surface, 14a, 14b, 14c, 14d 1st tubular part, 15a, 15b, 15c, 15d 1st contact part, 16a, 16b, 16c, 16d 2nd tubular part, 17a, 17b, 17c, 17d 2nd contact part, 18a, 18b, 18c, 18d joint part, 21a, 21c, 21d, 26a, 35a, 57a, 75a, 78a, 82a outer peripheral surface , 22a, 27a, 59a, 60a inner peripheral surface, 23a first end, 24a second end, 28a third end, 29a fourth end, 31a case, 32a spring, 33a first cap, 34a, 34b 1st pad, 36a mounting part, 37a space, 38a, 38b, 48a, 48b surface, 41a 1st jack part, 42a 2nd jack part, 43a 2nd cap, 44a, 44b 2nd pad, 45a 1st fitting Part, 46a second fitting part, 47a third fitting part, 49a rib, 50a step, 51a sleeve part, 52a screw, 53a, 55a, 68a, 69a end part, 54a first part, 56a second part, 58a Protruding part, 61a through hole, 62a nut part, 63a thread groove, 64a screw hole, 65a shaft part, 66a head, 67a rod-shaped part, 70a rotating shaft, 71a first area, 72a second area, 73a third area, 74a tip, 76a, 77a, 79a, 81a wire, 83a screw thread, 86 tension shelf, 87 net part.

Claims

It is a tension structure that can be attached while maintaining tension between two opposing surfaces.
A first cylindrical portion having a tubular shape and a second end portion located on the opposite side of the first end portion and the first direction which is the longitudinal direction with respect to the first end portion.
A region that is tubular and has a third end and a fourth end located on the opposite side of the first direction with respect to the third end and includes at least the third end. A second tubular portion that can be accommodated on the inner peripheral side of the tubular portion 1 and
A joint portion attached to the first cylindrical portion and restricting the movement of the second tubular portion with respect to the first tubular portion in the first direction is provided.
The joint portion is
A sleeve portion having a thread groove formed therein, having a screw hole penetrating in a second direction perpendicular to the first direction, and being attached to the outer peripheral surface of the first tubular portion,
Includes a screw that is movable in the second direction and is attached to the sleeve portion.
The screw
A shaft portion extending along the second direction and
Includes a head attached to the outer peripheral end of the shaft.
The shaft portion
A first region including the tip on the inner peripheral side of the shaft, and the cross-sectional area of the cross section perpendicular to the second direction becomes smaller toward the tip.
A second region arranged in series with the first region and having an outer peripheral surface along the second direction,
A strut structure including a third region which is arranged between the second region and the head so as to be connected to the second region and has a thread formed on an outer peripheral surface which engages with the screw groove.
The joint portion further includes a rod-shaped portion and includes a rod-shaped portion.
The tension structure according to claim 1, wherein one end of the rod-shaped portion is fixed to the head.
The strut structure according to claim 2, wherein the rod-shaped portion is arranged along the first direction in a state where the movement of the second tubular portion with respect to the first tubular portion is restricted. ..
The tension structure according to any one of claims 1 to 3, further comprising an elastic member arranged so as to make the pressure of the tension structure variable in the first direction.
The tension structure according to any one of claims 1 to 4, wherein the length of the second region in the second direction is larger than the wall thickness of the first tubular portion.
The tension structure according to any one of claims 1 to 5, wherein the length of the second region in the second direction is 2.0 mm or more and 8.0 mm or less.
The tension structure according to any one of claims 1 to 6, wherein the sleeve portion has a cylindrical shape.
The tension structure according to any one of claims 1 to 7, wherein the material of the second tubular portion is iron.