JP2001279922A - Tubing clamping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce working cost, to clamp both a circular tube and a square tube, to shorten the screwing distance of a clamping nut and to improve workability regarding a tubing clamping device for a scaffold or the like for construction. SOLUTION: A fixing arm member 11 and a movable arm member 21 for the tubing clamping device 10 are made of extruded profiles, and the first hinge composing section 14 is installed at one end section of the fixing arm member 11 and the second hinge composing section 24 with an opening section 25 in width narrower than the outside diameter of the first hinge composing section 11 to the base section of the movable arm member 21. Recessed strip sections 18, 28, into which the corner section of the square tube is fitted, are formed to the tubing pinching surfaces 13, 23 of the fixing arm member 11 and the movable arm member 21. A notch 27 is formed at the free end section of the movable arm member 21 and a slot 17 opposed to the notch 27 at the same side end section of the fixing arm member 11, the base section of a clamping bolt 31 is inserted into the slot 17, and a slipping-off preventive member 33 is secured at the base end section of the clamping bolt 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube material binding device capable of connecting a frame material used for a building scaffold or the like in a tightened state.

[0002]

2. Description of the Related Art Conventionally, as a tube material binding device capable of tightly connecting a frame material used for a building scaffold or the like, a tube material connecting portion attached to a distal end portion of a first frame material is known. And a fixed arm member forming an arc-shaped tube material holding surface as viewed from a plane along a part of the outer peripheral surface of the second framing tube material formed of a circular tube inside, and a base portion swingable on one end of the fixed arm member. A movable arm member pivotally attached to the inside and forming an arcuate tube material holding surface inside when viewed from a plane along another part of the outer peripheral surface of the second framing tube material, and swinging at the other end of the fixed arm member. It is known to include a tightening bolt which is freely mounted and has a tightening nut which is engaged with the free end of the movable arm member.

[0003]

However, in the conventional tube binding device, the processing of the pivotal joint between the fixed arm member and the movable arm member is troublesome, labor-intensive, and costly. Only circular pipes can be tightened as tubing materials.
The square tube cannot be tightened, and the free end of the movable arm member is further tightened with the tightening nut of the tightening bolt to join the tube in a tightened state, or conversely, loosen the tightening nut to tighten the tightening bolt. When removing and opening the movable arm member, the screwing distance of the tightening nut is long, so that there is a problem that it takes much time and the operability is very poor.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to make it possible to fit the pivoting portion of the fixed arm member and the movable arm member without any processing, which is very simple and troublesome. Therefore, it is very convenient because both the circular tube and the square tube can be tightened as the second framing tube, and the free end of the movable arm member is tightened. When connecting the tube in a tightened state by tightening with the bolt tightening nut, or when loosening the tightening nut to remove the tightening bolt and open the movable arm member, the screwing distance of the tightening nut is extremely short. Therefore, an object of the present invention is to provide a tube binding device used for a scaffold for construction and the like, which requires less labor and is excellent in operability.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a tubing binding device according to the present invention has a tubing connection portion attached to a distal end of a first framing tubing and has a second tubing connection portion therein. A fixed arm member made of an extruded section forming an arc-shaped tube material holding surface as viewed from a plane along a part of an outer peripheral surface of the frame member, a base portion pivotally pivotally attached to one end of the fixed arm member, and A movable arm member made of an extruded profile member forming an arc-shaped tube material holding surface as viewed from a plane along another part of the outer peripheral surface of the second framework tube material inside, and swinging at the other end of the fixed arm member. A tightening bolt having a tightening nut which is freely attached and is engaged with the free end of the movable arm member. Is provided over the entire width of the fixed arm member, and a first portion is provided at the base of the movable arm member. A second hinge component having a substantially C-shaped cross section and having an opening having a width smaller than the outer diameter of the first hinge component is provided over the entire width of the movable arm member. The second hinge component of the movable arm member is fitted to the first hinge component,
A retaining member having a second hinge component retaining portion at both ends is inserted into a hollow portion of the first hinge component.

In an architectural scaffold, the pillars and arms constitute the first frame for the frame, and the columns which are tightly connected to these via the tube binding device of the present invention are the second frame. The support pipe is formed of a circular pipe or a ribbed pipe having a cross-sectional shape close to the circular pipe.

In the above tube material binding device, two corner portions of a second frame pipe made of a rectangular tube having a rectangular cross section are provided at the center in the longitudinal direction of the tube holding surface of the fixed arm member. A U-shaped concave portion shallower than the plane into which one side of the movable arm member is fitted is provided in the width direction of the fixed arm member, and a second frame pipe member is provided at a position corresponding to the arc-shaped tube material holding surface as viewed from the plane of the movable arm member. Are provided in the width direction of the movable arm member, into which the remaining two corners are fitted, and a square tube can be used as a column constituting the second tubing tube.

In the tube binding device, a notch long in the longitudinal direction of the movable arm member is provided at the free end of the movable arm member, and the notch of the movable arm member is provided at the same side end of the fixed arm member. And a long hole is provided in the longitudinal direction of the fixed arm member,
The base of the tightening bolt is inserted into the long hole, and a retaining member is attached to the base end of the tightening bolt protruding from the long hole in a direction crossing the tightening bolt. When the member is disengaged from the free end, the tightening bolt is inclined in an outwardly inclined shape along the elongated hole. In addition, it is preferable to use a split pin as the retaining member.

[0009]

Next, an embodiment of the present invention will be described.
This will be described with reference to the drawings.

In this specification, the front, rear, left and right are based on FIG. 2, the front is the right side of FIG. 2, the rear is the same left side, the left is the lower side of the figure, and the right is the upper side. Shall be referred to.

Referring first to FIG. 1, a scaffold for construction (1)
Is a plurality of columns (2) arranged in pairs, and a pair of inclined pillars (3) (3) that support the columns (2) and (2) from outside.
And a number of steps (4) passed between the front and rear struts (2) and (2)
And a two-stage scaffold plate (40) arranged horizontally at the required height of the scaffold (1),
(4) (4) Many braces (41) to connect each other, and struts (2) (2)
By the arm (5) (5) passed between the pedestal (3) (3) and
It is mainly composed.

The upper and lower end portions (3a) and (3a) of the inclined pillars (3) and (3) for supporting the front and rear struts (2) and (2) from the outside, respectively, are connected to the pipe material binding devices (10) and (10) of the present invention. ), And the tube binding device (10) of the present invention is attached to the end (5a) of each arm (5) on the support (2) side.

Referring to FIG. 2, the strut (2) in this embodiment is constituted by a ribbed tube having a cross section close to a circular tube, and the pillar (3) and the arm (5) are each formed by a square tube. The step (4) is constituted by a circular pipe. All of these scaffolding components are made of extruded aluminum (including aluminum alloy).

The strut (2) has a flat wall portion (6) extending in the longitudinal direction and a curved wall portion (7) connected to both side edges and having an arc shape larger than a semicircle in cross section. , Flat wall
And (6) a rib (8) provided at the center of the width so as to protrude outward and extend in the longitudinal direction, and has a cross-sectional shape close to a circular pipe. The same column as the tip of the rib (8) of the column (2)
The distance from the center of the curved wall (7) in (2) is
(7) is equal to the radius of the arc-shaped cross section.

The support (2) may be formed by a normal circular tube, or may be formed by a square tube described later.

Next, a tube material binding device (10) according to the present invention.
Will be described with reference to FIGS. 2, 4, and 5. FIG. The pipe binding device (10) is located at the upper end of the pillar (first frame pipe) (3).
(3a) attached to a column (second tubing tube) (2)
To be tightly coupled.

The tube binding device (10) includes a fixed arm member (11) made of extruded aluminum and a left end (11) of the fixed arm member (11).
a) a movable arm member (21) made of an extruded aluminum member pivotally attached to the movable arm member (21); and a movable arm member (21) attached to the right end (11b) of the fixed arm member (11) so as to be swingable. ) And a tightening bolt (31) provided with a tightening nut (32) formed of a wing nut and hooked on the free end (right end) (21b) of the boss.

A pair of left and right tube material connecting portions (1) of the fixed arm member (11)
2) The upper end (3a) of the pillar (3) consisting of a square tube between the (12)
The left and right pipe joints (12) and (12) and the upper end of the pillar (3a) are made of stainless steel bolts (38) and nuts (3).
9) is connected through.

The fixed arm member (11) is provided on both left and right sides of the inside thereof with a tube material holding surface (13) (13) having an arc shape as viewed from a plane along a part of the outer peripheral surface of the column (2). . Fixed arm member (1
1) In the center of the inside, a U-shaped concave part (1
8) is provided in the width direction of the fixed arm member (11). This is because when the column (second tubing tube) (2) is made of a rectangular tube having a rectangular cross section, It is for fitting two corners and one side between them.

At the left end (11a) of the fixed arm member (11), a first hinge component (14) having a circular cross section is provided over the entire width of the fixed arm member (11). The first hinge component (14) may have a circular cross section.

On the other hand, the movable arm member (21) has a base pivotally attached to one end of the fixed arm member (11) so as to be able to swing freely, and has a second tubular member for frame, ie, an outer peripheral surface of the column (2). It has an arcuate tube holding surface (23) as viewed from a plane along another part.

The first portion (21a) of the movable arm member (21) is
A second hinge component (24) having a substantially C-shaped cross section and having an opening (25) having a width smaller than the outer diameter of the hinge component (14) is a movable arm member.
It is provided over the entire width of (21).

When viewed from the plane of the movable arm member (21), two concave ridges (28) and (28) are formed on the arc-shaped tube material holding surface (23) at a predetermined interval from each other. This is provided in the width direction of the column (21), but when the column (second tubing tube) (2) is made of a rectangular tube with a rectangular cross section, the remaining two columns of the column (2) It is for fitting a corner.

The second hinge member (24) of the movable arm member (21) is fitted to the first hinge member (14) of the fixed arm member (11). The inner surface (26) of the second hinge component (24) has a first hinge component (1
4) Guide surface.

Inside the left end portion (11a) of the fixed arm member (11), when the movable arm member (21) is closed (see the solid line portion in FIG. 2), a second hinge structure having a substantially C-shaped cross section is provided. A concave portion (15) into which the front end portion (24a) of the portion (24) fits is provided, and the movable arm member (21) is open outside the left end portion (11a) of the fixed arm member (11). (See the two-dot chain line in FIG. 2)
A step (16) is provided as a stopper against which the rear end (24b) of the hinge component (24) is brought into contact.

The free end (right end) of the movable arm member (21) (21b)
Has a notch (27) long in the longitudinal direction of the movable arm member (21), and the fixed arm member is opposed to the notch (27).
At the right end (11b) on the same side of (11), a long hole (17) long in the longitudinal direction of the fixed arm member (11) is provided.

A base portion (31a) of a tightening bolt (31) having a tightening nut (32) is inserted into the long hole (17) of the fixed arm member (11), and projects forward from the long hole (17). Tightened bolt base (31a)
A retaining split pin (retaining member) (33) is attached in a direction crossing the same. The upper part of the tightening bolt (31) protruding above the long hole (17) is fitted into a notch (27) of a free end (right end) (21b) of the movable arm member (21). At the portion near the inner end of the long hole (17) on the front surface of the right end (11b) of the fixed arm member (11), a concave strip (33) into which the retaining pin (33) of the tightening bolt base (31a) is fitted. 19) are provided in the width direction of the fixed arm member (11).

Then, the second hinge member (21) of the movable arm member (21) is attached to the first hinge component (14) of the fixed arm member (11) of the tube material binding device (10).
The movable arm member (21) is pivotally attached to the left end (11a) of the fixed arm member (11) by being fitted with the hinge component (24). A bolt (retaining member) (34) is inserted through the hollow portion of the first hinge component (14).
The bolt head (35) and the nut (36) of (34) function as a retaining portion of the second hinge component (24). In addition, this retaining member may be other rivets, for example, when using a rivet, the rivet head acts as one retaining portion, and the other end of the rivet shaft portion is crimped and crushed. A large-diameter convex portion is formed, and this large-diameter convex portion acts as the other retaining portion.

In the above, the support (2) of the building scaffold (1)
In order to connect the upper end portion (3a) of the inclined pillar (3) to the tube material binding device (10) of the present invention, first, as shown by a two-dot chain line portion in FIG. In a state where the movable arm member (21) is opened with respect to the fixed arm member (11) of (10), a predetermined intermediate portion of the height of the column (2) is fitted. At this time, the screwing of the tightening nut (32) provided on the tightening bolt (31) is loosened, and the tightening bolt (31) is fixed to the right end (11) of the fixed arm member (11).
b) It has fallen outwardly along the long hole (17).

Next, as shown by the solid line portion in FIG. 2, the movable arm member (2) is moved with respect to the fixed arm member (11) of the tube material binding device (10).
When (1) is closed, a predetermined intermediate portion of the height of the column (2) is sandwiched between the fixed arm member (11) and the movable arm member (21), and the right end (11b) of the fixed arm member (11). Notch (27) at free end (right end) (21b) of movable arm member (21) with respect to slot (17)
Oppose each other.

In this state, the tightening bolt (31) is further raised to fit into the notch (27) of the movable arm member (21) and the retaining cotter pin (31) of the tightening bolt base (31a) is removed. 33),
Recess (19) near the inner end of the long hole (17) of the fixed arm member (11)
To fit.

Next, a tightening nut (32) composed of a wing nut provided on the tightening bolt (31) is tightened, and the tightening nut is tightened.
By engaging (32) with the free end (right end) (21b) of the movable arm member (21), the fixed arm member (1
The movable arm member (21) and the movable arm member (21) are firmly connected with the support (2) sandwiched between them, and the upper end (3) of the inclined pillar (3) is attached to the support (2).
a) can be connected via a tube material binding device (10).

In addition, the tightening bolt (31) which is inclined outwardly is raised, fitted into the notch (27) of the movable arm member (21), and the tightening nut (32) is tightened. Tightening nut (3
The screwdriver distance in 2) can be very short.

Inside the fixed arm member (11) and the movable arm member (21) of the tube material binding device (10), the curved wall of the column (2) is formed.
(7) is an arc-shaped tube holding surface (13) (13) as viewed from the plane of the fixed arm member (11) and an arc-shaped tube holding surface (23) as viewed from the plane of the movable arm (21); Further, the tip of the rib (8) of the column (2) is formed along the center of the tube holding surface (23) of the movable arm member (21).

Further, the fixed arm member (11) of the tube material binding device (10)
In order to release the connection between the arm and the movable arm member (21) and remove the inclined pedestal (3) from the support (2), the tightening nut (32) is attached to the tightening bolt (31) in the opposite way to the above. ) And tighten the tightening bolts (3
1) is tilted outwardly in a slant along the long hole (17) at the right end (11b) of the fixed arm member (11). Thereafter, the movable arm member (21) can be easily removed by swinging and opening.

At this time, the tightening nut (32) can be loosened so that the tightening bolt (31) can be tilted outwardly and the tightening bolt (31) can be moved to the right end of the fixed arm member (11). (11
b) can be moved outward along the long hole (17), so that the tightening bolt (31) is notched (27) in the movable arm member (21).
It is possible to escape relatively quickly, loosen the tightening nut (32) and remove the tightening nut (3) when removing the tightening bolt (31).
The screwing distance of 2) is also very short.

Thus, according to the present invention, a scaffold for building
When the upper end (3a) of the inclined pillar (3) is connected to the support (2) of (1) via the tube tying device (10) of the present invention, or the fixing arm of the tube tying device (10) Member (11) and movable arm member (21)
When removing the inclined pedestal column (3) from the support column (2) by uncoupling with the column, the screwing distance of the tightening nut (32) can be very short, so there is no need for labor. Excellent operability.

In the above embodiment, the scaffold for construction (1)
The tube material binding device (10) of the present invention is also attached to the end (5a) of the arm (5) on the support (2) side of the arm member (5).
When the end (5a) of the arm (5) is connected to the strut (2) via the arm, or conversely, when the arm (5) is detached from the strut (2), the leg to the strut (2) is used. The operation may be performed in the same procedure as in the case of mounting and removing the column (3).

FIG. 3 shows the pipe binding device (10) of the present invention even when the column (second frame pipe) (22) of the architectural scaffold (1) is made of a square tube having a rectangular cross section. ) Can also be used. That is, when a column (22) made of a square tube is sandwiched between the fixed arm member (11) and the movable arm member (21) of the tube material binding device (10) of the present invention, the tube material of the fixed arm member (11) is obtained. Holding surface (13)
U-shaped concave part (1) shallower than the plane of the central part in the longitudinal direction of
8), the two corners (22a) and (22a) of the column (22) formed of a square tube and one side between them are fitted into the movable arm member (21).
The remaining two corners (22a) and (22a) of the column (22) made of a square tube are fitted into the two concave strips (28) and (28) of the tube material holding surface (23).

As described above, according to the tube material tying device (10), both the circular tube and the square tube can be tightened as the column (the second framing tube) of the building scaffold (1). Very convenient.

The fixed arm member (11) and the movable arm member (21) of the tube material binding device (10) are both made of an extruded aluminum member, and the extruded members having the above-mentioned cross-sectional shape are required. After cutting to length, the free end (2
1b), insert the notch (27) in the right end (1
1b) is very easily manufactured by forming a slot (17) facing the notch (27), respectively, and furthermore, the fixed arm member (11) and the movable arm member (21) At the pivot,
The movable arm member (2) is attached to the first hinge component (14) of the fixed arm member (11).
The second hinge component (24) of (1) can be fitted without any processing, which is very simple, hassle-free, and therefore the processing cost is low, and thus the pipe binding device (10)
The manufacturing cost is low.

As shown in FIGS. 1, 6 and 8, in this embodiment, a pillar (3) with a crosspiece (5) is used, and the upper end (3a) of the pillar (3) is used. ), A pipe tying device (10) of the present invention is attached, and an L-shaped portion (43) of a fixing bracket (42) is attached to a lower portion of the pedestal (3) by welding. Fork (44) (44)
One end (5b) of a brace (5) is fitted between them, and is swingably attached via a bolt (38) and a nut (39). Further, the tube material binding device (10) of the present invention is swingably attached to the other end (5a) of the arm member (5) via a bolt (38) and a nut (39).

In the assembled state of the architectural scaffold (1),
As described above, the upper end (3a) of the pillar (3) is connected to the column (2) of the building scaffold (1) via the pipe tying device (10) of the present invention, and Although the end (5a) is connected to the column (2) through the tube material binding device (10) of the present invention, when the scaffold (1) is disassembled, as shown in FIG. ) From arm
(5) After removing the two pipe tying devices (10) and (10) of the pedestal (3), the arm (5) is arranged parallel to the pedestal (3), and the arm (5) At the side end (5a), connect the tubing tie (10)
By connecting to the middle part of (3), there is an advantage that the pillar (3) with the arm (5) can be put together in a very compact storage state.

[0044]

According to the pipe tying device used for a scaffold for construction and the like according to the present invention, a first hinge component having a circular cross section or a circular cross section is provided at one end of the fixed arm member. The first arm member is provided over the entire width and is fitted to the base of the movable arm member with the first hinge component and
A second hinge component having a substantially C-shaped cross section having an opening having a width smaller than the outer diameter of the hinge component is provided over the entire width of the movable arm member, and the first hinge component of the fixed arm member is provided with a movable arm member. The second hinge component is fitted into the hollow portion of the first hinge component, and the retaining member having the second hinge component retaining portion at both ends is inserted into the hollow portion of the first hinge component. The pivoting part can be fitted without any processing, which is very simple, hassle-free, and therefore the processing cost is low, and the fixed arm member and the movable arm member are, for example, extruded aluminum members. It can be manufactured very easily simply by cutting the material into a required length, and the production cost of the tube tying device can be reduced.

Further, in the above tube material binding device, two corner portions of a second frame pipe made of a square tube having a rectangular cross section are provided at the center in the longitudinal direction of the tube material holding surface of the fixed arm member, and between the two corner portions. A U-shaped concave portion shallower than the plane into which one side is fitted is provided in the width direction of the fixed arm member, and the arc-shaped tube material holding surface corresponds to the arc-shaped tube material holding surface as viewed from the plane of the movable arm member. The provision of the concave ridge into which the remaining two corners are fitted in the width direction of the movable arm member allows both the circular tube and the square tube to be tightened as the second framing tube, which is very convenient. It works.

Furthermore, in the above tube material binding device, a notch long in the longitudinal direction of the movable arm member is provided at the free end of the movable arm member, and the notch of the movable arm member is provided at the same side end of the fixed arm member. A long hole is provided in the longitudinal direction of the fixed arm member, and the base of the tightening bolt is inserted into the long hole, and the base end of the tightening bolt protruding from the long hole is stopped in a direction crossing the same. When the member is attached and the tightening nut is loosened by loosening the screw of the tightening nut and the free end of the movable arm member is disengaged, the tightening bolt falls down along the long hole in an outwardly inclined shape. Therefore, tighten the free end of the movable arm member with the tightening nut of the tightening bolt, or conversely, loosen the tightening nut and remove the tightening bolt. The screwing distance can be very short, so During Do ゝ Razz has excellent tube Tightened device operability, an effect that.

[Brief description of the drawings]

FIG. 1 is a side view of an architectural scaffold in which struts and pedestals are connected by a product of the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA of FIG. 1, in which a column-constituting tube is joined in a tightened state by the product of the present invention.

FIG. 3 is an enlarged sectional view of the same, in which a column-constituting tube made of a square tube is joined in a tightened state by the product of the present invention.

FIG. 4 is an enlarged perspective view of the product of the present invention.

FIG. 5 is an enlarged exploded perspective view of the same.

FIG. 6 is an enlarged side view of a pedestal with a brace provided with the product of the present invention, showing a state in which a brace is opened with respect to the pedestal.

FIG. 7 is an enlarged side view of the pedestal, showing a state where arms are compactly combined with the pedestal.

FIG. 8 is an enlarged sectional view taken along the line BB of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scaffold 2 Prop (2nd tubing tube) 3 Pillar (1st tubing tube) 3a Upper end 5 5 Pillar (1st tubing tube) 5a End 10 Pipe tying device 11 Fixed arm member 11a Left end Part (one end) 11b Right end (other end) 12 Pipe connection part 13 Arc-shaped pipe holding surface 14 First hinge component 17 Long hole 18 Shallow U-shaped concave part 21 Movable arm member 21a Base 21b Free end 22 Post made of a square tube (second tubing tube material) 24 Second hinge component 25 Opening 27 Notch 28 Concave streak 31 Tightening bolt 32 Tightening nut 33 Retainer split pin (retaining member) 34 Removal Locking bolt (retaining member) 35 Bolt head (second hinge component retaining portion) 36 Retaining nut (second hinge component retaining portion)

Claims (3)

[Claims] 1. A tube connecting portion attached to a front end portion of a first framing tube, and an inner tube holding surface having an arc shape as viewed from a plane along a part of an outer peripheral surface of a second framing tube therein. A fixed arm member made of an extruded profile to be formed, and a base portion pivotally attached to one end of the fixed arm member so as to be swingable, and the inside thereof is viewed from a plane along another part of the outer peripheral surface of the second tubing tube. It has a movable arm member made of an extruded member that forms an arc-shaped tube material holding surface, and a tightening nut that is swingably attached to the other end of the fixed arm member and engages with the free end of the movable arm member. A fixed hinge member, and a first hinge component having a circular cross section or a circle is provided at one end of the fixed arm member over the entire width of the fixed arm member, and a first hinge component is provided at the base of the movable arm member. Width smaller than the outer diameter of the first hinge component and fitted into the first hinge component A second hinge component having a substantially C-shaped cross section is provided over the entire width of the movable arm member, and the second hinge component of the movable arm member is attached to the first hinge component of the fixed arm member.
A tubing binding device, wherein a hinge component is fitted, and a retaining member having a second hinge component retaining portion at both ends is inserted into a hollow portion of the first hinge component. 2. The two corners of a second tubing tube made of a square tube having a rectangular cross section and one side between them are fitted in the longitudinal center of the tube holding surface of the fixed arm member. A U-shaped concave portion shallower than the plane to be inserted is provided in the width direction of the fixed arm member, and the other two corners of the second tubing tube material are provided at positions corresponding to the arc-shaped tube material holding surface as viewed from the plane of the movable arm member. The tube material binding device according to claim 1, wherein a concave ridge portion for fitting the portion is provided in a width direction of the movable arm member. 3. A free end of the movable arm member is provided with a notch that is long in the longitudinal direction of the movable arm member, and the same end of the fixed arm member is opposed to the notch of the movable arm member and has a fixed arm. A long hole is provided in the longitudinal direction of the member, a base of the tightening bolt is inserted into the long hole, and a retaining member is attached to a base end of the tightening bolt protruding from the long hole in a direction crossing the same, and tightening is performed. When the loosening of the nut is loosened and the engagement between the tightening nut and the free end of the movable arm member is released, the tightening bolt is tilted outwardly along the elongated hole. The tube material binding device according to claim 1.