JPH084949A - Clamp for conduit tube - Google Patents

Abstract

PURPOSE:To provide a clamp to fix a conduit tube to a C-shaped steel member. CONSTITUTION:A clamp is formed of a plate having the spring characteristic, upper ends of a pair of rear leg parts 5a, 5b are integratedly connected to form the section of inverse U-shape, fore leg parts of the section of inverse J-shape are formed forward of the upper ends, a pair of hooking claws are formed on each side of the tip of the fore leg parts, hooking claws 6a, 6b are formed on the respective tips of a pair of rear leg parts 5a, 5b, and a holding part 2 of a conduit tube is formed on the upper inner surface of the fore leg parts. The conduit tube 10 can be fixed to a C-shaped steel member 11 by hooking the respective hooking claws 6a, 6b to a pair of inner flange parts 1 2a, 12b opposite to the C-shaped steel member 11. Thus, the conduit tube can be fixed to the C-shaped steel member in one operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit tube clamp used for fixing and laying conduit tubes on C-shaped steel materials arranged in parallel at predetermined intervals.

[0002]

2. Description of the Related Art Conventionally, in order to lay a conduit in a building or a plant, as shown in FIG. 15, a pair of fastening plates 14 and 14 having an inverted J-shaped cross section and bolts 15 each having a bolt hole at the upper end. Using a saddle type conduit clamp consisting of
A method of fixing the conduit 10 to a mounting member such as a C-shaped steel material 11 is adopted. In this method, the conduit 1 is placed on a C-shaped steel material 11 arranged in parallel at a predetermined interval at right angles to the laying direction.
0 is arranged, and the electric wire clamp is fixed with bolts 15 at those steel material portions.

[0003]

However, when such a conventional conduit clamp is used, there is a problem that it takes a lot of time and labor to fix a large number of conduit clamps with bolts. There is also a problem that the clamp is deformed if it is excessively tightened when the conduit is pressed by the conduit clamp to tighten the bolt, and therefore the tightening torque needs to be managed. Moreover, the conventional conduit clamp does not have sufficient strength at the bolt fastening part,
When a strong force is applied to the conduit, there is a risk that the conduit will separate from the mounting portion. Then, this invention makes it a subject to provide the novel clamp which solves the problem in such a conventional conduit clamp.

[0004]

That is, the conduit clamp of the present invention is used for fixing a conduit to a C-shaped steel material. The clamp is formed in a plate shape having a spring property, and has a pair of rear legs 5a and 5b integrally connected between the upper ends so as to have an inverted U-shaped cross section, and the inverted U-shaped upper end thereof. A front leg portion 3 having an inverted J-shaped cross section that integrally extends from the center to the front, a holding portion 2 for a conduit formed on the inner surface of the upper end portion of the front leg portion 3, and both front end sides of the front leg portion 3 The pair of engaging claws 4a, 4b and the engaging claws 6a, 6b formed in a hook shape on the outside of the tips of the pair of rear leg portions 5a, 5b are provided. And the engaging claws 4a and 4b and the engaging claw 6
By engaging a and 6b with a pair of inner flanges 12a and 12b facing each other in the opening of the C-shaped steel material 11, the conduit tube 10 is C
It is characterized by being fixed to the mold steel material 11.

[0005]

According to the electric wire clamp of the present invention, first, the pair of engaging claws of the front leg portion are engaged with the pair of inner flange portions of the C-shaped steel material facing each other, and then the respective engaging claws of the pair of rear leg portions are C. The conduit tube can be fixed to the C-shaped steel material by simply engaging the pair of inner flange portions of the shaped steel material facing each other in the same manner. Therefore, the conduit can be fixed quickly with one touch. Moreover, unlike the prior art, torque management for fixing the conduit is not required. Further, the fixing strength of the conduit can be made sufficiently high.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a conduit tube clamp of the present invention as seen from above, and FIG. 2 is a perspective view as seen from below. The clamp 1 is configured by bending a plate material having a T-shape and having a spring property into an arc shape. That is, the central portion of the plate material is used as the pressing portion 2 of the conduit, the central portion is bent into an arc shape, and a pair of engaging claws 4a and 4b are formed on both sides of the tip to form the front leg portion 3, and the legs on both sides face each other. In this way, the pair of rear legs 5a and 5b are formed by bending them in an arc shape and forming hooking claws 6a and 6b at their tips.

The front end of the front leg portion 3 is bent by a bending portion 16 in the shape of a cross section before and after the bending portion 16. The pair of engaging claws 4a and 4b are projected laterally in a trapezoidal shape, and their oblique sides are aligned with the inclined surfaces of the inner flange portions 12a and 12b of the C-shaped steel material 11 (FIG. 3). Similarly, the inclined surfaces of the engaging claws 6a, 6b of the rear leg portions 5a, 5b also have inner flange portions 12a, 1 of the C-shaped steel material 11.
It matches the inclined surface of 2b. Further, the widths of the rear leg portions 5a and 5b are gradually narrowed toward the tip end side thereof. As the plate material having a spring property, a relatively thin stainless plate or spring steel plate having a predetermined rigidity and elasticity, for example, a thickness of about 1.0 mm to 1.5 mm can be used. Further, a plastic plate material reinforced with glass fiber or carbon fiber having similar characteristics may be used. However, it is preferable to use a stainless plate from the viewpoints of reliability and durability. To make the clamp of the present invention from these plate materials, for example, it may be cut into a T shape by a press or the like and bent into a predetermined shape.

It is preferable that both edges of the central portion of the plate material to be the pressing portion 2 are formed in an arc shape that fits the outer shape of the conduit. The engaging claws 4a and 4b are formed by extending both side portions of the bent piece 4 which is obliquely bent outward from the tip of the front leg portion 3. And these engaging claws 4a, 4
The interval of b is made larger than the opening width of a pair of opposing inner flanges of the C-shaped steel material described later. Also, the hook 6
Each of a and 6b is formed by a bent piece in the shape of a return piece that is bent outward from the tip of each of the rear legs 5a and 5b at an acute angle. The distance between the engaging claws 6a and 6b is also larger than the opening width of a pair of facing inner flanges of a C-shaped steel material, which will be described later, like the engaging claws 4a and 4b.

FIG. 3 is a perspective view showing a state in which an electric conduit is fixed to a C-shaped steel material by using the clamp shown in FIG. 1 (FIG. 2), FIG. 4 is a left side view thereof, and FIG. 5 is a right side view thereof. FIG. 6 is a front view seen from the axial rear side of the conduit tube, and FIG. 7 is a bottom view. In these drawings, the C-shaped steel material 11 arranged orthogonally to the laying direction of the conduit 10 has a pair of inner flange-shaped inner flange portions 12a and 12b facing each other at its opening. The inner collar portions 12a and 12b are inclined downward.
Then, the conduit 10 is pressed by the pressing portion 2 of the clamp 1, and the engaging claws 4a and 4b of the front leg portion 3 of the clamp 1 and the engaging claws 6a and 6b of the rear leg portions 5a and 5b of the clamp 1 have inner flange portions 12a and 12b.
It is fixed to the C-shaped steel material by being hooked on the back side of the.

Next, the procedure for fixing the conduit 10 to the C-shaped steel material 11 using the clamp 1 will be described with reference to FIGS. First, as shown in FIG. 8, the clamp 1 is brought close to the electric wire tube 10 arranged orthogonally to the C-shaped steel material 11, the front leg portion 3 thereof is inserted into the C-shaped steel material 11, and the engaging claws 4a and 4b are inserted inside. The collar portions 12a and 12b are engaged with each other. In addition, the engaging claws 4a and 4b protruding from both sides of the front leg portion 3 are formed on the inner flange portion 12.
Insert the front leg 3 into the C-shaped steel material 11 with the front leg 3 slightly inclined so as not to be caught by a and 12b.

Next, as shown in FIG. 9, the bottoms of the engaging claws 6a and 6b formed at the tips of the rear legs 5a and 5b are C-shaped steel material 11 while the pressing portion 2 of the clamp 1 is in contact with the electric wire tube 10.
After the clamp 1 is rotated until it comes into contact with the inner flanges 12a, 12b of the upper part of the rear leg parts 5a, 5b, as shown in FIG.
The inner flanges 12a, 12b of a and 6b are utilized by utilizing their springiness.
It is inserted into the inside of the C-shaped steel material 11 from between and the inner collar portion 12
By engaging with the back side of a and 12b, the conduit tube 10
Is fixed to the C-shaped steel material 11 as shown in FIG. (Note that FIGS. 8 to 10 show the state in which FIG. 3 is viewed from the opposite direction for the sake of explanation.)

FIG. 11 is a perspective view of a second embodiment of the present invention. The difference of this embodiment from the previous embodiment is that the bent portion 16 provided on the front leg portion 3 is located above the engaging claws 4a and 4b. It is located at. By doing so, it can be easily attached to the conduit. FIG. 12A and FIG.
2 (b) and FIG. 13 (a) (b) showing their sides.
As is clear from a comparison with the above, when the main clamp is attached, the engaging claws 4a of the front leg part 3 are not
The height of the front edge 17 of the rear leg increases when the rear leg 5a is positioned above the lower leg 2a. This is because the position of the bent portion 16 is higher than the top surface of the tip of the inner flange portion 12a. If this bent portion 16 is not provided, FIG.
As shown in FIG. 2 (b), the position of the front edge 17 of the rear leg portion 5a is lowered, and when the clamp is fitted on the electric wire tube 10, it is necessary to deform the front leg portion 3 more greatly. Will be difficult. In addition, in FIG. 12A, the front edge 17 of the rear leg portion is formed so as to widen toward the front end in the state shown in the drawing. This is for facilitating the attachment of the clamp by preventing the front edge 17 of the clamp from interfering with the electric wire tube 10 when the clamp is rotated about the point B of the hook 4a.

Next, FIG. 14 shows a third embodiment of the present invention.
The difference of this embodiment from the first embodiment is that a curved portion 19 is provided near the tip of the front leg portion 3. The curved portion 19 absorbs the tolerance of the conduit and the C-shaped steel material and absorbs the mounting error of the clamp. That is, the mounting height of the C-shaped steel material 11 on which the conduit is placed varies depending on the unevenness of the mounting surface. Then, the lower surface of the conduit tube cross-linked to the plurality of C-shaped steel tubes and the upper surface of the C-shaped steel material do not always come into contact with each other, and a gap may be opened between them. In such a case, by deforming the curved portion 19 and extending the front leg portion 3, it is possible to absorb the mounting error of the C-shaped steel material. In addition, the diameters of the C-shaped steel material itself and the electric conduit also vary to some extent. Even if these variations exist, they can be absorbed by the presence of the curved portion 19.

For reference, from a stainless steel plate having a thickness of 1.3 mm, the front leg 3 has a width of 22 mm, the engaging claws 4a and 4b have projecting lengths and widths of 6 mm and 6 mm, respectively, and the rear legs 5a and 5b have an intermediate height. A width of 14 mm, a diameter of 28 mm in which the protrusion length and width of the engaging claws 6a and 6b are 3 mm and 12 mm, respectively
1. A clamp for use in the electric wire tube of FIG. 1 was prepared, and one portion of the electric wire tube was fixed on a C type steel material arranged horizontally as shown in FIG. 3 to test its attachment strength. As a result, the tensile strengths of the conduit in the axial direction, and in the horizontal and vertical directions perpendicular thereto are 6 times, 2 times, and 2 times, respectively, as compared with the clamp by the conventional bolt fastening method shown in FIG. Showed the value.

[0015]

As described above, the electric wire tube clamp of the present invention is composed of a plate-shaped integral bending member, and has an extremely simple structure and a small number of parts. Then, the conduit is pressed by the pressing portion, and the pair of engaging claws of the front leg are engaged with the pair of inner flanges of the C-shaped steel material facing each other, and then the respective engaging claws of the pair of rear leg portions are opposed to the C-type steel material. It can be fixed to the C-shaped steel material simply by engaging the pair of inner flange portions in the same manner. Therefore, the conduit tube can be fixed quickly and easily with one touch. Moreover, unlike the prior art, torque management for fixing the conduit is not required. Further, the fixing strength of the conduit tube can be made higher than before.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a conduit tube clamp of the present invention seen from above.

FIG. 2 is a perspective view of the conduit clamp of FIG. 1 viewed from below.

FIG. 3 is a perspective view showing a state in which a conduit is fixed to a C-shaped steel material using the clamp shown in FIG. 1 (FIG. 2).

FIG. 4 is a left side view of FIG.

5 is a right side view of FIG.

6 is a front view of the conduit in FIG. 3 as viewed from the rear side in the axial direction.

FIG. 7 is a bottom view of FIG.

FIG. 8 is a perspective view illustrating a procedure of fixing the electric wire tube 10 to the C-shaped steel material 11 by using the clamp 1 in the state as shown in FIG.

9 is a perspective view illustrating a procedure of fixing the electric wire tube 10 to the C-shaped steel material 11 by using the clamp 1 in the state as shown in FIG.

10 is a perspective view illustrating a procedure of fixing the electric wire tube 10 to the C-shaped steel material 11 by using the clamp 1 in the state as shown in FIG.

FIG. 11 is a perspective view showing a second embodiment of the clamp of the present invention.

FIG. 12 is an explanatory diagram showing a mounted state of the clamp.

13 is a right side view of FIG.

FIG. 14 is a perspective view showing a third embodiment of the clamp of the present invention.

FIG. 15 is a perspective view of a conventional clamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp 2 Holding part 3 Front leg 4 Bending piece 4a Engagement claw 4b Engagement claw 5a Rear leg 5b Rear leg 6a Engagement claw 6b Engagement claw 10 Conduit 11 C-type steel 12a Inner flange 12b Inner flange 13 Drive Tool 14 Fastening plate 15 Bolt 16 Bent section 17 Front edge 18 Anti-slip 19 Curved section

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenichi Nakayama 1-26-5 Kichijojihonmachi, Musashino City, Tokyo Lead Engineering Co., Ltd. (72) Tokuaki Nakamura 1-26-5 Kichijojihonmachi, Musashino City, Tokyo Lead Engineering Co., Ltd.

Claims (2)

[Claims] 1. A clamp 1 for fixing an electric conduit 10 to a C-shaped steel material 11, which is formed into a plate shape having a spring property, and whose upper ends are integrally connected so as to have an inverted U-shaped cross section. Pair of rear legs 5a, 5
b, a front leg portion 3 having a reverse J-shaped cross section, which integrally extends forward from the center of the upper end of the inverted U shape thereof, and a holding portion 2 of the conduit formed on the inner surface of the upper end portion of the front leg portion 3. And a pair of engaging claws 4 formed on both sides of the front end of the front leg portion 3.
a and 4b, and hooking claws 6a and 6b formed in a hook shape on the outer sides of the tips of the pair of rear leg portions 5a and 5b. The holding part 2 holds the electric wire tube 10 and the hooking claw 4a. 4b and the engaging claws 6a, 6b are engaged with the pair of inner flanges 12a, 12b facing each other of the opening of the C-shaped steel material 11 to fix the electric conduit 10 to the C-shaped steel material 11. . 2. The conduit clamp according to claim 1, wherein the material having spring properties is a stainless steel plate.