JP6165310B1 - Telescopic tension rod - Google Patents

Abstract

An object of the present invention is to provide a telescopic tension rod that is more convenient. A locking mechanism is provided that can determine the overall length of a tension bar by positioning a small-diameter pipe having a second contact tool relative to a large-diameter pipe having a first contact tool. The locking mechanism includes at least a guide portion provided so as to project outward at one end of the large-diameter pipe, and a holding portion that is attached to the guide portion so as to be movable within a predetermined range in the longitudinal direction of the projecting rod. . By rotating the handle provided in the holding part, the small-diameter pipe is sandwiched and fixed by the holding part, and the roller in the handle rotates in the inclined groove provided in the guide part to hold the small-diameter pipe. By moving the part to the second contact tool side, a tension bar is stretched between the mounting surfaces. [Selection] Figure 2

Description

  The present invention relates to a telescopic tension rod that functions as a column or a horizontal member by being disposed so as to be stretched between opposing mounting surfaces such as between a ceiling and a floor or between side walls, both indoors and outdoors.

  Telescopic stretch rods are roughly classified into two types: a type that is arranged between the side walls in a substantially horizontal direction and a type that is arranged between the ceiling and the floor in a substantially vertical direction.

For example, there is an invention described in Patent Document 1 below as a strut-type support column standing between a ceiling and a floor.
This strut is locked between the large diameter pipe [1] and the small diameter pipe [2] so that the small diameter pipe [2] is pulled out above the large diameter pipe [1] and cannot move up and down. Locking tool [4] is provided.
The locking device [4] includes a fixing ring [42] provided on the large-diameter pipe [1], a fastening ring [43] that sandwiches the small-diameter pipe [2] by the operation of the handle [44], and the handle [44]. The link [45] which moves the movable shaft [57] downward by the operation and pushes up the fastening ring [43] after the movable shaft [57] comes into contact with the lower portion of the guide groove [59] provided in the fixed ring [42]. ] Is provided.
The operation of the handle [44] of the lock [4] enables the small diameter pipe [2] to be held and pushed up.

Japanese Patent No. 3952370

However, the above-described strut-type support described in Patent Document 1 has at least one of the following problems and improvements.
(1) I want to perform the column locking operation more smoothly.
When the fastening ring [43] sandwiching the small-diameter pipe [2] is pushed upward, the contact point between the lower portion of the guide groove [59] and the movable shaft [57] serves as a stationary fulcrum that receives the reaction force. There is a limit to the labor saving of the column lock work.
(2) High strength is required for the movable shaft.
As described in (1) above, since the movable shaft [57] serves as a stationary fulcrum, it is necessary to give the movable shaft [57] high strength.
(3) The fixing work of the handle itself becomes complicated.
After locking with the locking tool [4], the handle [44] and the link [45] are fastened using a stopper [73] consisting of a screw shaft so that the handle [44] does not move unintentionally and the locking mechanism does not come off. And fixed.
Therefore, the stopper [73] must be prepared separately, and the work tends to be complicated.
(4) I want to increase safety.
Since a support post is added to a place that did not originally exist in the space to be installed, there is a concern of causing a collision with a person or an object in an environment with poor visibility such as at night.

  As described above, at least one of the objects of the present invention is to provide a telescopic tension rod that is more convenient.

The first invention of the present application, which has been made to solve the above-mentioned problems, is an extendable tension rod arranged so as to stretch between opposing mounting surfaces, and a first contact tool that contacts one mounting surface at one end. A small-diameter pipe that is attached to a large-diameter pipe, a second contact tool that contacts the other attachment surface is attached to one end, and the other end can be accommodated in the large-diameter pipe, and a small-diameter relative to the large-diameter pipe by positioning the pipes, the total length of the spur of the determinable, comprising at least a locking mechanism, wherein the locking mechanism, on the other end of the large diameter pipe, provided so as to protrude outward, and the guide portion, the guide A holding portion that is movably attached within a predetermined range in the longitudinal direction of the tension rod to the portion, and the guide portion is provided on the second contact tool side from the outer edge of the guide portion toward the inside. Including a sloping groove The narrowing portion has at least an expansion / contraction ring capable of accommodating a small-diameter pipe, and a handle provided with a rotation shaft on the expansion / contraction ring, and the expansion / contraction ring includes the small-diameter pipe. A cylindrical portion to be accommodated, and a flange portion projecting laterally from both ends of the side wall of the tubular portion, each having a gap provided between the flange portions, wherein the handle includes the handle At least a roller having a rotation axis orthogonal to the longitudinal direction of the handle and the longitudinal direction of the large-diameter pipe, and when using a tension rod, the rotation of the handle narrows the gap between the flanges by the rotation of the handle. By reducing the inner diameter, the narrow portion is sandwiched and fixed by the sandwiching portion, and the roller rotates in the inclined groove so that the sandwiching portion sandwiching the small diameter pipe is moved from the guide portion. 2 connections Is characterized in that the moving to the tool side.
Further, the second invention of the present application is the roller according to the first invention, wherein the guide portion has a preliminary groove extending further to the second contact tool side from the back of the inclined groove and travels to the back of the inclined groove. And adjusting means for moving the sandwiching portion sandwiching the small-diameter pipe in a direction further separating from the guide portion by pushing the member into the preliminary groove.
Further, the third invention of the present application is characterized in that, in the second invention, there is further provided a regulating means that protrudes into the inclined groove and can prevent the roller from being detached from the guide portion. It is.
According to a fourth aspect of the present invention, in the third aspect of the present invention, the screw includes a bolt capable of projecting a tip from the bottom lower surface of the inclined groove by screwing from the lower portion of the guide portion. Further, the control means is also used.
According to a fifth invention of the present application, in at least any one of the first to fourth inventions, at least one of a large diameter pipe, a small diameter pipe, a lock mechanism, a first contact tool, and a second contact tool. One of the features is that a phosphorescent unit is provided.

According to the present invention, at least one of the effects described below is achieved.
(1) The stretching operation of the tension rod is smooth.
As the roller provided on the handle rotates in the inclined groove, the nipping portion sandwiching the small-diameter pipe can be smoothly moved in a direction away from the guide portion.
(2) There is no place where the load is heavy.
Since the fulcrum receiving reaction force, which is the contact position between the roller and the inclined groove, always moves, no great force is applied to the roller.
(3) The work of fixing the handle itself is not complicated.
By accommodating the roller in the deep part of the inclined groove and then projecting the restricting means into the inclined groove, the movement path of the roller can be blocked and the roller can be easily prevented from detaching from the guide part.
Further, when a bolt is used as the restricting means, a bolt is attached in advance to the lower portion of the guide portion, and the bolt tip can be exposed in the inclined groove by advancing the screwing of the bolt. At this time, if a part of the bolt is always screwed into the guide portion, the operator can easily fix the handle itself without the trouble of searching for a member.
(4) Visibility is improved.
Visibility at night is improved by providing the phosphorescent portion in at least one of the large diameter pipe, the small diameter pipe, the lock mechanism, the first contact tool, and the second contact tool.
Therefore, it is suitable for use in a hospital ward or a living room such as a nursing facility.

The schematic front view which shows the whole structure of the expansion-contraction type tension rod which concerns on this invention. The schematic perspective view which shows the structure of a locking mechanism. The schematic perspective view and schematic plan view of a guide part. The schematic perspective view and schematic plan view of a holding | grip part. The schematic perspective view of a handle and a roller. The schematic front view which shows the usage image of a locking mechanism.

  Embodiments of the present invention will be described below with reference to the drawings.

<1> Overall configuration (Fig. 1)
The telescopic tension rod according to the present invention is a member disposed so as to stretch between opposing mounting surfaces.
As shown in FIG. 1, the telescopic tension rod according to the present embodiment (hereinafter also simply referred to as “stretch rod”) has a large-diameter pipe A whose one end is in contact with one mounting surface X and one end which is the other. A small-diameter pipe B that contacts the mounting surface Y and can be accommodated on the other end of the large-diameter pipe A, and a lock mechanism C that positions the large-diameter pipe A and the small-diameter pipe B are provided. .
Furthermore, the locking mechanism C is provided on the other end of the large diameter pipe A, a guide portion C1, be in the upper portion of the guide portion C1, a small diameter pipe B sandwiching, strut in cooperation with the guide portion C1 It includes at least a holding portion C2 that is movable by a predetermined distance in the longitudinal direction of the rod.
Details of each component will be described below.

<2> Large diameter pipe (Fig. 1)
The large-diameter pipe A is a member for enabling the full length of the tension rod to be expanded and contracted by accommodating the small-diameter pipe B therein so that it can be pulled out.
The large diameter pipe A is a cylindrical long material having an inner diameter larger than the outer diameter of the small diameter pipe B.
One end of the large-diameter pipe A is provided with a first contact tool A1 that comes into contact with one mounting surface X. In this embodiment, one mounting surface X is a floor surface.
On the other hand, the other end of the large-diameter pipe A is provided with an opening for accommodating a small-diameter pipe B, which will be described later, and the lock mechanism C is disposed near the outer periphery of the opening.

<2.1> First Contact Tool The first contact tool A1 is a member that comes into contact with one mounting surface X and stably supports the telescopic tension rod together with the second contact tool B1 described later. .
In this embodiment, the first contact tool A1 is provided with at least a plastic base A11 provided with a cylindrical insertion portion in the center, and one end of a large-diameter pipe A inserted into the insertion portion and bolted thereto. Is configured.

  In addition, although the 1st contact tool A1 can employ | adopt a preferable mechanism from the edge part mechanisms employ | adopted in the well-known expansion-contraction type tension rod, detailed description is abbreviate | omitted.

<3> Small diameter pipe (Fig. 1)
The small-diameter pipe B is a member for making the full length of the strut rod extendable by being pulled out from the state accommodated in the large-diameter pipe A.
On one end side of the small-diameter pipe B, a second contact tool B1 that comes into contact with the other mounting surface Y is provided. In the present embodiment, the other mounting surface Y is a ceiling surface.
The other end of the small-diameter pipe B is in a state of being inserted into the large-diameter pipe A and housed therein.

<3.1> Second Contact Tool The second contact tool B1 is a member that comes into contact with the other mounting surface Y and stably indicates the telescopic tension rod together with the first contact tool A1.
In the present embodiment, the second contact tool B1 is provided with a cylindrical insertion portion at the center, and one end of the small-diameter pipe B is inserted into the insertion portion, and a plastic receiving portion B11 having a substantially T-shape in front view. And a support plate B12 that is wider than the base.

The receiving portion B11 and the small diameter pipe B are preferably connected via an elastic member such as a coil spring.
By the interposition of this elastic member, it is possible to control the tension force with the other mounting surface Y within an appropriate range when the telescopic tension rod is used.
Further, when a mark is provided around the end of the small-diameter pipe B and this mark portion is exposed from the receiving portion B11, it indicates that the control of the tension force by the elastic member is insufficient. You may comprise.

  In addition, although the 2nd contact tool B1 can employ | adopt a preferable mechanism from the edge part mechanisms employ | adopted in the well-known expansion-contraction tension rod, detailed description is abbreviate | omitted.

<3.2> Other mechanisms In addition, the small-diameter pipe B includes a retaining mechanism for preventing the small-diameter pipe B from completely coming out of the large-diameter pipe A, and a small-diameter pipe B when the small-diameter pipe B is accommodated in the large-diameter pipe A. A movement restraining mechanism or the like for preventing the pipe B from moving vigorously can be provided. As these mechanisms, known mechanisms can be used, and are not shown in this embodiment.

<4> Guide section (Fig. 3)
The guide portion C1 is a member that is provided on the other end side of the large-diameter pipe A and moves the holding portion C2 sandwiching the small-diameter pipe B by a predetermined distance in the longitudinal direction of the tension rod.
The guide portion C1 has at least a base portion 10 that fixes one end to the other end side of the large-diameter pipe A and an overhang portion 20 that protrudes from a part of the side surface of the base portion 10.
Details of each part will be described below.

<4.1> Base The base 10 is an element for restricting the movement of the holding portion C2 described later within a predetermined range.

<4.1.1> Insertion Hole One mounting surface side (first contact tool B1 side) of the base 10 has an insertion hole 11 that exhibits an inner diameter corresponding to the outer diameter of the large-diameter pipe A.

<4.1.2> Storage Space The other mounting surface side (second contact tool B1 side) of the base 10 has a storage space 12 that exhibits an inner diameter that can accommodate the expansion / contraction ring 60 of the clamping unit C2 described later.
A notch portion 121 is provided in a part of the peripheral wall constituting the housing space, and a claw portion 612 in the expansion / contraction ring 60 described later interferes so that the expansion / contraction ring 60 does not come out to the other mounting surface X2 side. It is composed.

<4.1.3> Cap A stepped portion 13 generated by an inner diameter difference between the accommodation space 12 and the insertion hole 11 is fitted into the stepped portion 13 and dropped out to one mounting surface side of an expansion / contraction ring 60 described later. A cap or the like may be provided (not shown) for more reliably preventing the above.

<4.2> Overhanging portion The overhanging portion 20 is a member for receiving the roller 80 provided in the handle 70 in accordance with the rotation operation of the handle 70 provided in the holding portion C2 described later.
The overhanging portion 20 is provided so as to overhang from the peripheral wall on the one attachment surface X side (first contact tool B1 side) of the base portion 10.

<4.2.1> Inclined groove The overhanging portion 20 is provided with an inclined groove 30 having a width that can accommodate the roller 80 provided in the holding portion C2 in a manner of penetrating from the front side to the back side. ing.
The inclined groove 30 moves from one attachment surface X side (first contact tool A1 side) to the other attachment surface Y side as it advances from the entrance of the roller 80 at the outer edge of the overhanging portion 20 to the inner back portion. An inclination angle is provided so as to head toward the second contact tool B1 side.

<4.2.2> Preliminary Groove Further, a pregroove 40 is formed in the deep part of the inclined groove 30 and proceeds from the deep part to the other mounting surface Y side (second contact tool B1 side).
The preliminary groove 40 also has a width that can accommodate the roller 80.

<4.2.3> Difference in the thickness of the overhanging portion As shown in FIG. 3B, the overhanging portion 20 joins the portions where both ends of the plate constituting the base portion 10 protrude outward. Configured. The thickness (t ₁ ) of _one projecting portion 20a of the projecting portion is larger than the thickness (t ₂ ) of the other projecting portion 20b. This is because the adjustment means D and the regulation means E, which will be described later, are provided on one overhanging portion 20.

<4.3> Adjustment means (FIG. 2)
The adjusting means D pushes the roller 80 slid to the back of the inclined groove 30 into the preliminary groove 40, thereby further separating the holding portion C2 sandwiching the small-diameter pipe B from the guide portion C1. It is a member for moving in the direction to make.
In the present embodiment, a screw hole 51 that penetrates the end surface of the guide portion C1 on the one attachment surface X side (first contact tool A1 side) so as to communicate with the inclined groove 30 is screwed into the screw hole. The bolt 52 and the adjusting means D are configured.
The exit of the screw hole is the bottom surface of the deep part of the inclined groove 30.
By inserting the bolt 52 into the screw hole, exposing the tip of the bolt 52 into the inclined groove 30, and pushing the roller 80 with the tip, the total length of the tension rod can be finely adjusted.

<4.4> Regulatory means (Fig. 2)
The restricting means E is a means for preventing the roller 80 from detaching from the guide portion C <b> 1 by being provided so as to block the inside of the inclined groove 30.
The restricting means E can be a bolt 52 that can be exposed in the inclined groove 30 or a pin that is inserted into the inclined groove 30.
In this embodiment, the screw hole 51 and the bolt 52 as the adjusting means D in <4.3> also serve as the regulating means E.
This is because when pushing the roller 80 with the tip of the bolt 52 with the exposed position inner portion lower surface of the inclined grooves 30 in the spare grooves 40 side, resulting in the bolt 52 and thus block the inclined groove 30.

<5> Nipping part (Fig. 4)
The sandwiching portion C2 is a member for fixing the small-diameter pipe B between them and working with the guide portion C1 to move the small-diameter pipe B by a predetermined distance in the longitudinal direction of the tension rod.
The holding portion C2 includes at least an expansion / contraction ring 60 that can accommodate the small-diameter pipe B, and a handle 70 provided with a rotation shaft on the expansion / contraction ring 60.
Details of each component will be described below.

<5.1> Expansion / contraction ring The expansion / contraction ring 60 is a member for gripping the small-diameter pipe B accommodated inside the ring.
The expansion / contraction ring 60 includes a cylindrical portion 61 provided with a gap 611 in a part of the side wall of the cylindrical body, and a flange portion 62 provided so as to project laterally from both ends of the side wall of the cylindrical portion 61 provided with the gap 611. At least.

<5.1.1> Tube Part The tube part 61 is a member for accommodating the small-diameter pipe B so as to be gripped or slidable.
The cylinder part 61 is configured such that a gap 611 is provided in a part of the side wall, and the gap 611 is expanded / reduced so that the inner diameter of the cylinder part 61 can be expanded / reduced.
Therefore, the small diameter pipe B can be gripped by reducing the inner diameter of the cylindrical portion 61 to a diameter smaller than the outer diameter of the small diameter pipe B.

<5.1.1.1> Claw part At the lower end of the cylinder part 61, a claw part 612 protruding outward from the side wall is provided.
By positioning the claw portion 612 in the notch portion 121 provided in the base portion 10 of the guide portion C1, the expansion / contraction ring 60 is prevented from coming off from the base portion 10.

<5.1.2> Gutter part The gutter part 62 is an element for rotatably attaching a handle 70 described later within a predetermined range, and for reducing the diameter of the expansion / contraction ring 60 when a certain rotation angle is reached. is there.
The flange portion 62 projects laterally from both ends of the side wall of the cylindrical portion 61 provided with the gap 611, and the gap 611 is configured to be expanded and contracted by the rotation operation of the handle 70.
And the collar part 62 is attaching the end of the handle 70 with the rotating shaft 612 provided so that it might cross between the collar parts 62, and the longitudinal direction of the handle 70 is orthogonal to the longitudinal direction of a telescopic tension rod In the process of rotating the handle 70 to one attachment surface side (first contact tool A1 side), the gap 611 is reduced and the small diameter pipe B is gripped.
The clearance 611 can be reduced by adjusting the degree of interference between the handle 70 and the flange 62.
In the present embodiment, a pair of arms is attached so as to sandwich the front and rear surfaces of the flange 62, and the handle 70 is configured. The distance between the inner walls of the arms is configured to maintain a constant length.
Then, if a thickened portion is formed in which the thickness between the front and rear surfaces of the flange portion 62 including the intermediate gap 611 is gradually increased in accordance with the rotation locus of the handle 70, the rotation operation of the handle 70 is performed. As a result, the collar 62 is pushed by the arm of the handle 70 and acts to narrow the gap 611.

<5.2> Handle (Fig. 5)
The handle 70 is a member for realizing a function of holding the small-diameter pipe B by the rotation operation and a function of moving the sandwiched small-diameter pipe B to the other mounting surface side (second contact tool B1 side). is there.
The handle 70 includes an arm 71 that is attached so as to sandwich the front and rear surfaces of the flange portion 62, and one end of the arm 71 is rotatably attached to the flange portion 62 with a cover 72 interposed.

<5.2.1> Roller The roller 80 is a member for traveling in the inclined groove 30 of the guide portion C1.
The roller 80 is provided so as to cross between the arms 71 at a position separated by a predetermined length from the attachment position between the pair of arms 71 and the flange portion 62.
The rotation axis direction of the roller 80 is a direction orthogonal to the longitudinal direction of the handle 70 and the longitudinal direction of the large-diameter pipe A, that is, corresponds to the transverse direction between the arms 71.

<6> Other processing treatments The telescopic pull rod according to the present invention may be subjected to the following processing treatments.

<6.1> Phosphorescent treatment At least one of the members (large diameter pipe A, small diameter pipe B, lock mechanism, first contact tool A1 and second contact tool B1) constituting the telescopic pull rod A phosphorescent unit can be provided.
The phosphorescent part can use methods such as a method of forming each member with a phosphorescent material, a method of separately applying a known phosphorescent paint to each member, and a method of attaching a phosphorescent sheet to each member. By providing the phosphorescent portion, visibility at night is improved, so it is suitable for use in a room space such as an inpatient ward or a nursing facility.

<7> Usage example (Fig. 6)
The use image of the expansion-contraction type tension by the above-mentioned guide part C1 and the holding part C2 is demonstrated.

<7.1> Pulling out the small-diameter pipe When the handle 70 is orthogonal to the longitudinal direction of the tension rod, the expansion / contraction ring 60 does not grip the small-diameter pipe B. The sliding is possible.
In this state, the first contact tool A1 on the large-diameter pipe A side is brought into contact with one mounting surface X, the small-diameter pipe B is pulled out, and is the same length as the distance to the other mounting surface Y or slightly shorter than that. Stretch the tension bar to length.

<7.2> Start of handle rotation to grip of small-diameter pipe After the small-diameter pipe B is extended to an appropriate length, the rotation operation of the handle 70 is started.
As the handle 70 is rotated downward (counterclockwise in FIG. 6A), the collar portion 62 is pushed inward by both arms 71, and the small diameter pipe is narrowed by the cylindrical portion 61 having a reduced diameter by narrowing the gap 611. Insert B.
In this state, only the relative position between the small-diameter pipe B and the holding portion C2 is determined, and the small-diameter pipe B and the large-diameter pipe A are not fixed.

<7.3> Introduction of Roller into Inclined Groove-Travel of Inclined Groove As the handle 70 rotates, the roller 80 provided on the handle 70 eventually enters the inclined groove 30 of the guide portion C1. Go.
As described above, since the inclined groove 30 is provided with an inclination angle toward the other mounting surface (the second contact tool B1 side), the small-diameter pipe B is sandwiched as the roller 80 advances deeper into the inclined groove 30. The holding portion C2 (expansion / contraction ring 60) moves to the other mounting surface (the second contact tool B1 side) using the contact point between the inclined groove 30 and the roller 80 as a fulcrum that receives the reaction force.
This moving length corresponds to the separation distance of the longitudinal component of the strut rod from the bottom of the inlet of the inclined groove 30 to the bottom of the deep part of the inclined groove 30.

<7.4> Reaching the deep part of the inclined groove When the roller 80 reaches the deep part of the inclined groove 30, the tension rod is extended by a predetermined length (elongation amount h), and between the mounting surfaces. It is set in a state where it is fixed to some extent or sufficiently (FIG. 6B).
That is, the second contact tool B1 is sufficiently pressed and brought into contact with the other attachment surface so that the attachment surfaces are sufficiently stretched.

<7.5> Fine adjustment of the overall length When the pull-out amount of the small-diameter pipe B in <7.1> and the elongation amount h after <7.3> are insufficient, the roller 80 reaches the back. In some cases, the tension rod does not sufficiently stretch.
As this determination method, a mark for confirming whether or not the elastic member provided in the second contact tool B1 is sufficiently pushed by receiving a reaction force from the other mounting surface Y is used as the second contact tool B1. It is possible to use a method that is provided in the system.
If it is determined by the method or the like that the amount of tension of the tension rod is insufficient, the bolt 52 is screwed into the threaded hole 51 penetrating so as to communicate with the bottom of the back portion, and the tip of the bolt 52 Thus, the roller 80 can be pushed into the preliminary groove 40 and finely adjusted in the direction of extending the length of the tension bar.

<7.6> Locking the handle After the tension bar is sufficiently fixed between the mounting surfaces, the locking operation is performed so that the handle 70 at the fixed position does not return to the initial position.
In the present embodiment, when the roller 80 is pushed out to the preliminary groove 40 side in the fine adjustment operation of <7.5>, the exposed bolt 52 is in a state of closing the inside of the inclined groove 30. Since the roller 80 does not slip out into the inclined groove 30, the handle 70 is substantially locked.

A Large-diameter pipe A1 First contact tool B Small-diameter pipe B1 Second contact tool C Lock mechanism C1 Guide part C2 Nipping part 10 Base part 11 Insertion hole 12 Storage space 121 Notch part 13 Step part 20 Overhang part 30 Inclined groove 40 Preliminary groove 51 Screw hole 52 Bolt 60 Expansion / contraction ring 61 Tube portion 611 Clearance 612 Claw portion 62 Gutter portion 621 Rotating shaft 622 Thickening portion 70 Handle 80 Roller D Adjustment means E Restriction means X One attachment surface Y The other attachment surface

Claims (5)

An extendable tension rod that is arranged to stretch between opposing mounting surfaces,
A large-diameter pipe having a first contact tool that is in contact with one mounting surface at one end;
A small diameter pipe that has a second contact tool that contacts the other mounting surface attached to one end and can accommodate the other end in a large diameter pipe;
A locking mechanism that can determine the overall length of the tension bar by positioning the small-diameter pipe relative to the large-diameter pipe;
The locking mechanism is
In another end of the large diameter pipe, provided so as to protrude outwardly, the guide section,
A holding part, which is attached to the guide part so as to be movable within a predetermined range in the longitudinal direction of the strut rod,
The guide portion is
An inclined groove including at least a groove inclined toward the second contact tool from the outer edge of the guide portion toward the inside;
The holding portion is
An expansion / contraction ring that can accommodate small diameter pipes,
And at least a handle provided with a rotation shaft on the expansion / contraction ring,
The expansion / contraction ring is
A cylindrical portion for accommodating a small-diameter pipe;
A flange that protrudes laterally from both ends of the side wall of the cylindrical portion, and has at least a flange that is provided with a gap between the flanges,
The handle has at least a roller having a rotation axis perpendicular to the longitudinal direction of the handle and the longitudinal direction of the large-diameter pipe;
When using a tension rod,
By rotating the handle, by narrowing the gap between the flanges and reducing the inner diameter of the expansion / contraction ring, the small diameter pipe is sandwiched and fixed by the holding part,
The roller moves in the inclined groove to move the holding portion sandwiching the small-diameter pipe from the guide portion to the second contact tool side,
Telescopic tension rod. The guide portion has a preliminary groove extending further from the back of the inclined groove toward the second contact tool,
Adjusting means for moving the nipping part sandwiching the small-diameter pipe in a direction further separating from the guide part by pushing the roller that has traveled to the inner part of the inclined groove into the preliminary groove; Characterized by having,
The telescopic tension rod according to claim 1. And a restricting means that protrudes into the inclined groove and can prevent the roller from being detached from the guide portion.
The telescopic tension rod according to claim 2. By screwing from the lower part of the guide part, it has a bolt capable of projecting the tip from the lower surface of the deep part of the inclined groove,
The bolt is used both as an adjusting means and a regulating means,
The telescopic tension rod according to claim 3. At least one of the large diameter pipe, the small diameter pipe, the lock mechanism, the first contact tool and the second contact tool is provided with a phosphorescent part,
The telescopic tension rod according to any one of claims 1 to 4.

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