JP2021134843A - Pipe clamp - Google Patents

Abstract

To provide a pipe clamp capable of being fixed with substantially even holding force in a pipe outer peripheral direction, reducing a manufacturing cost, and easily managing a product.SOLUTION: A pipe clamp 1 is configured such that a pair of clamp pieces 2, 2 formed in a substantially semicircular shape according to the outer peripheral surface of a pipe is pivotally supported at one end part, and the other end part can be opened and closed. The pair of clamp pieces 2 and 2 is formed in the same shape, and has a semicircular arcuate surface rib 4 formed so that the pipe can be held by a substantially semicircular arcuate surface 41 by reducing the diameter of both side edge parts 31 having a semicircular arc shape and bending the pipe outward.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pipe clamp that holds and fixes a pipe used for a temporary scaffold or the like.

In construction work and painting work, temporary scaffolding that is assembled by connecting single pipes is used for aerial work. At this time, various clamps are used to connect the pipes. For example, an orthogonal clamp that fixes the pipes in an orthogonal state, a universal clamp that can freely change the angle between the pipes, and three clamps. A triple clamp capable of connecting pipes, an H steel clamp capable of connecting a pipe and H steel, and the like are used.

The pipe clamp is a metal fitting for fixing a pipe in such various clamps, and has a structure in which a plurality of arc-shaped clamp pieces are rotatably supported and one end side can be opened and closed. Then, the pipe is sandwiched between each clamp piece, and the open end is fastened with a fastening material to fix the pipe to other pipes or various fastening materials such as steel materials.

Various configurations have been proposed for such pipe clamps. For example, in Japanese Patent Application Laid-Open No. 3-78841, an arc-shaped edge that engages with the other half of the outer circumference of the pipe is provided at one end of an L-shaped holding base having an arc-shaped edge that engages with approximately half of the outer circumference of the pipe. The base end of the hugging opening / closing body is pivotally attached so that it can be opened and closed, and a fastening bolt with a head is screwed into the opening / closing cylinder having a female screw on the inner peripheral surface. A temporary clamp has been proposed, characterized in that a fitting groove for fitting the tip of a tightening bolt is formed (Patent Document 1).

Jikkenhei 3-78841

However, since the shape of each clamp piece is different in the conventional pipe clamps such as the invention described in Patent Document 1, there is a problem that the holding force cannot be evenly applied in the outer peripheral direction of the pipe. In addition, there is a drawback that the area for holding the pipe is small and the holding force is not sufficient. For this reason, there is a risk that the pipe will spin idle due to insufficient pinching force or imbalance in pinching force, and there is a risk of scaffolding collapsing in temporary scaffolding used for aerial work, which is extremely dangerous.

Further, the clamp piece may be deformed or damaged by tightening the open end portion too strongly. Therefore, after use, the presence or absence of damage is checked in preparation for the next use, but the frequency of maintenance increases and the burden of maintenance is heavy.

Further, since the pair of conventional clamp pieces have different shapes, there is room for improvement in terms of manufacturing cost and product management.

The present invention has been made to solve the above problems, and can be fixed with a substantially uniform holding force in the outer peripheral direction of the pipe, the manufacturing cost is reduced, and product management is easy. It is intended to provide a pipe clamp that can be made.

The pipe clamp according to the present invention solves the problems of increasing toughness and strongly tightening a pipe, preventing slipping with the pipe, reducing manufacturing costs, and facilitating maintenance. In addition, it is a pipe clamp in which a pair of clamp pieces formed in a substantially semicircular shape according to the outer peripheral surface of the pipe are rotatably supported at one end and the other end can be opened and closed. The pair of clamp pieces are formed to have the same shape, and the pipes are formed so as to be able to be sandwiched by a substantially semicircular arc surface by reducing the diameters of both side edges of the semicircular arc shape and bending them outward. It has a semi-circular arc surface rib.

Further, as one aspect of the present invention, in order to solve the problem of increasing versatility, the pair of clamp pieces are connected to other fixing brackets at the center position of the top of the substantially semicircular arc surface in the main body portion. A connecting hole into which the connecting member can be fitted may be formed.

Further, as one aspect of the present invention, in order to solve the problem of increasing the toughness at the portion where the pipe is fastened, the other end of the pair of clamp pieces that can be opened and closed is extended outward. A bent fastening portion may be formed, and a fastening hole through which the fastening member can be inserted may be formed at a substantially central position of the fastening portion.

According to the present invention, the pipe can be fixed with a substantially uniform holding force in the outer peripheral direction of the pipe, the manufacturing cost can be reduced, and the product can be easily managed.

It is a perspective view which shows one Embodiment of the pipe clamp which concerns on this invention. It is (a) left side view and (b) front view which show the pipe clamp of this embodiment. (A) A perspective view, (b) a cross-sectional view, and (c) a side view and a cross section of the connecting member showing a metal fitting in which the pipe clamp of the present embodiment and another pipe clamp are connected by a connecting member having a polygonal cross section. It is a figure. It is (a) cross-sectional view and (b) side view and cross-sectional view of (a) connecting member which connected the pipe clamp of this embodiment and another pipe clamp by the connecting member having a circular cross section. It is a perspective view which shows the state which configured the pipe clamp of this embodiment as a triple clamp. It is a perspective view which shows the state which one of the pipe clamps of this embodiment is configured as (a) H steel clamp, and (b) is the perspective view which shows the state which this H steel clamp is connected to H steel. It is a perspective view which shows the state which fixed the pipe-shaped wall connecting material to the orthogonal clamp using the pipe clamp of this embodiment.

Hereinafter, an embodiment of the pipe clamp according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the pipe clamp 1 of the present embodiment is mainly composed of a pair of clamp pieces 2 and 2. The pair of clamp pieces 2 and 2 are configured such that one end thereof is rotatably supported and the other end thereof can be opened and closed. Further, in the pair of clamp pieces 2 and 2, each clamp piece 2 is formed in the same shape.

Each clamp piece 2 has a main body portion 3 formed in a substantially semicircular shape along with the outer peripheral surface of the pipe, a semicircular arcuate surface rib 4 formed on both side edge portions 31, and one end portion rotatably supported by a shaft. It has a shaft support portion 5 to be formed, and a fastening portion 6 formed on the end side that can be opened and closed.

The main body 3 is a portion serving as a main body of a pair of clamp pieces 2 and 2 capable of sandwiching and fixing a pipe-shaped member such as a temporary scaffolding pipe or a pipe-shaped wall connecting material, and has a predetermined width. It is formed in a semicircular shape. As shown in FIG. 1, a connecting hole 32 is formed at the center position of the top of the substantially semicircular arc surface of the main body portion 3 so as to be connectable with another fixing bracket 7.

The connecting hole 32 is a hole having a size capable of fitting a connecting member 8 used for connecting to another fixing metal fitting 7, and in the present embodiment, as shown in FIGS. 1 to 4, the main body 3 is abbreviated. The central position of the top of the semicircular arc surface is bulged outward, and the outer surface thereof is formed flat, and is opened at a substantially central position of the flat surface 33. As a result, as shown in FIGS. 3 and 4, the other fixing metal fittings 7 to be connected can be connected to each other on flat surfaces. The other fixing bracket 7 in the present embodiment is a bracket that can be configured as various clamps by being connected to the pipe clamp 1 of the present embodiment, and is, for example, a pipe clamp 1 having the same shape as that of the present embodiment, H steel, or the like. Examples include clamps that can be tightened to, and L-shaped metal fittings that can be fixed to rafters.

The inner peripheral shape of the connecting hole 32 is not particularly limited, but as shown in FIG. 1, it is formed into a polygonal shape in the present embodiment. Further, as will be described later, by appropriately selecting the connecting member 8 to be fitted into the connecting hole 32 from a polygonal shape and a circular shape in the cross section, the connecting member 8 can be fixedly connected to the other fixing metal fittings 7 in an orthogonal state. It can be rotatably connected.

The semicircular arcuate surface rib 4 is a portion formed so as to improve the toughness of the clamp piece 2 itself and to make it evenly contact with the sandwiching pipe on a wide surface, as shown in FIGS. 1 and 2. , It is formed on both side edge portions 31 having a semicircular shape in the main body portion 3. In the present embodiment, both side edge portions 31 of the main body portion 3 are reduced in diameter according to the outer peripheral diameter of the pipe to be fastened, and the tip portion thereof is bent outward so as to be parallel to the outer peripheral surface of the pipe to be sandwiched. It has a substantially semi-arc surface 41. As shown in FIGS. 3 and 4, the width of the substantially semicircular arc surface 41 is formed to be wider than the thickness of the main body portion 3, and is equivalent to the thickness of the main body portion 3 with respect to the outer peripheral surface of the pipe when sandwiched. It is configured so that it can be contacted in a wider area than it is contacted by the edge portion having a width. Further, the semi-circular surface rib 4 has a length substantially equal to the length of the arc portion of the clamp piece 2, and the pair of clamp pieces 2 and 2 are configured to have the same length at four locations. , The pipe is designed to be clamped with an even gripping force.

The shaft support portion 5 is a portion that rotatably supports the pair of clamp pieces 2 and 2 with each other, and is formed by extending one end of the main body portion 3 outward. As shown in FIG. 2A, the shaft support portion 5 in the present embodiment includes a shaft support portion main body 51 formed in a substantially U shape in a side view and a shaft member that penetrates the shaft support portions 5 of each clamp piece 2. It is composed of 52. As shown in FIGS. 2 (b) and 3 (b), the shaft support main body 51 in the present embodiment is configured so that the other end side can be opened and closed, so that the main body 3 of the other clamp piece 2 connected to the shaft support main body 51 can be opened and closed. The edge portion is formed in an arc shape so as not to be caught on the outer peripheral surface or the inner peripheral surface of the shaft support main body 51. As described above, the pair of clamp pieces 2 and 2 are formed in the same shape in the shaft support portion 5. Further, the shaft member 52 is not particularly limited, but is composed of rivets in the present embodiment.

The fastening portion 6 is a portion for fastening the other end of the pair of clamp pieces 2 and 2 that can be opened and closed, and is bent so as to extend the main body portion 3 outward. A fastening hole 61 through which the fastening member 9 can be inserted is formed at a substantially central position of the connecting portion 6. The fastening hole 61 in the present embodiment is formed in an annular shape without an opening in the circumferential direction in order to enhance toughness. The fastening member 9 is not particularly limited, but in the present embodiment, a welding nut 91 welded and fixed to the outside of the fastening portion 6 of one clamp piece 2 and a hexagon bolt 92 that can be fastened to the welding nut 91. It consists of.

Next, the operation of each configuration in the pipe clamp 1 of the present embodiment will be described.

In the pipe clamp 1 of the present embodiment, the fastening member 9 of the fastening portion 6 is removed, and the other end side of the pair of clamp pieces 2 and 2 is opened. Then, a pipe is arranged between the clamp pieces 2 to close the other end side.

Next, the fastening member 9 is inserted into the fastening hole 61 to fasten the other end side of each clamp piece 2. Since the fastening hole 61 in the present embodiment is formed in an annular shape without an opening in the circumferential direction, it has high toughness and can be fastened with a strong fastening force without being deformed or broken.

Further, since the pair of clamp pieces 2 and 2 are formed in the same shape, the semicircular arc surface rib 4 clamps the pair of clamp pieces 2 and 2 with equal force with respect to the pipe. At this time, since the substantially semi-circular arc surface 41 of the semi-arc surface rib 4 is in contact with the pipe in an evenly wide area, a strong frictional force is exhibited. Therefore, slipping on the pipe can be effectively prevented. Further, due to the rib structure, the main body 3 itself of the clamp piece 2 also has toughness, and is a structure that is not easily damaged.

Further, the pipe clamp 1 of the present embodiment is connected to another fixing bracket 7 by using a connecting member 8, and various types such as an orthogonal clamp, a universal clamp, a triple clamp and an H steel clamp are used depending on the application. Can be configured as a clamp.

For example, as shown in FIG. 3, when the other pipe clamp 1 is connected to the other pipe clamp 1 by the connecting member 8 whose cross section is formed in a polygonal shape according to the inner peripheral shape of the connecting hole 32, the relative of each pipe clamp 1 is formed. It can be connected with the angle fixed. Therefore, if the pipes are connected in a state of being rotated by 90 degrees, the pipes can be configured as an orthogonal clamp that can be connected in a state of being orthogonal to each other.

Further, as shown in FIG. 4, when a rotatable cross section is formed in a circular shape with another pipe clamp 1 and connected by a connecting member 8, each pipe clamp 1 can rotate relatively freely. .. Therefore, the pipes can be configured as a universal clamp that can be connected to each other at an arbitrary angle.

Further, since the pair of clamp pieces 2 and 2 are formed in the same shape and the connecting holes 32 are formed in both clamp pieces 2 and 2, a plurality of pipe clamps 1 can be connected in succession. For example, as shown in FIG. 5, three pipe clamps 1 can be connected to each other by a connecting member 8 to form a triple clamp.

Further, a member other than the pipe clamp 1 can be connected to the pipe clamp 1 of the present embodiment. For example, as shown in FIG. 6A, it can be configured as an H-steel clamp by connecting a clamp that can be connected to the H-steel as another fixing bracket 7. At this time, by forming the connecting member 8 in a circular shape and using rivets, the pipe can be freely rotated with respect to the connected H-steel as shown in FIG. 6 (b).

Further, the pipe is not limited to the pipe for temporary scaffolding, and can be fixed to a pipe-shaped member or the like. For example, as shown in FIG. 7, the pipe-shaped wall connecting member 10 can be fixed to one of the pipe clamps 1 of the orthogonal clamp using the pipe clamp 1 of the present embodiment.

According to the pipe clamp 1 of the present embodiment as described above, the following effects can be obtained.
1. 1. Since the pair of clamp pieces 2 and 2 are formed in the same shape, the pipe can be fixed with an even holding force with respect to the outer circumference of the pipe.
2. By having the semicircular arc surface rib 4, the toughness of the main body portion 3 can be enhanced.
3. 3. The substantially semi-circular arc surface 41 of the semi-arc surface rib 4 widens the contact area with the pipe and exerts a strong frictional force, so that idling with the pipe can be prevented.
4. By forming the connecting hole 32 at the center position of the top of the substantially semicircular arc surface in the main body 3, it can be applied to various clamps and has high versatility.
5. Since the fastening hole 61 is formed in an annular shape without an opening portion, the toughness of the fastening portion 6 can be enhanced.
6. By forming the pair of clamp pieces 2 and 2 into the same shape, parts processing and assembly can be facilitated, manufacturing costs can be reduced, and product management can be facilitated.
7. Since the fastening member 9 for fastening the fastening portion 6 is a separate body, the fastening member 9 does not protrude when the other end portion is opened.

The pipe clamp according to the present invention is not limited to the above-described embodiment, and can be changed as appropriate.

1 Pipe clamp 2 Clamp piece 3 Main body 4 Semi-arc surface rib 5 Shaft support 6 Fastening part 7 Other fixing bracket 8 Connecting member 9 Fastening member 10 Wall connecting material 31 Both side edges 32 Connecting hole 33 Flat surface 41 Approximately semi-arc surface 51 Shaft branch body 52 Shaft member 61 Fastening hole 91 Welding nut 92 Hexagon bolt

Claims (3)

A pipe clamp in which a pair of clamp pieces formed in a substantially semicircular shape according to the outer peripheral surface of a pipe are pivotally supported at one end and the other end can be opened and closed.
The pair of clamp pieces are formed in the same shape, and the semicircular arc-shaped side edges are reduced in diameter and bent outward so that the pipe can be sandwiched by a substantially semicircular surface. The pipe clamp having an arcuate surface rib. The pipe according to claim 1, wherein a connecting hole into which a connecting member for connecting with another fixing bracket can be fitted is formed at a position at the center of the top of a substantially semicircular arc surface in the main body of the pair of clamp pieces. Clamp. At the other end of the pair of clamp pieces that can be opened and closed, a fastening portion that is bent so as to extend outward is formed, and a fastening member can be inserted at a substantially central position of the fastening portion. The pipe clamp according to claim 1 or 2, wherein a fastening hole is formed.

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