JP2000008604A - Clamp and clamp device for pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp in which the external peripheral face of a pipe is caught by the tops of projections to join to them with a large bonding pressure and prevent the pipe from shifting by forming a number of projections at the pipe receive face of a support body and a cover constituting the clamp. SOLUTION: This clamp constituted of a support body 1 formed of a L-shaped base end 11 and a rib 12, a cover 2 with a rib 22, and a fastening metal fitting 3 is made of a metallic material chiefly made of iron. A number of projections 4 are formed at pipe receive faces of the arcuate ribs 12, 22 corresponding to the profile of a pipe. One end 201 of the cover 2 is rotatably fixed to one end 101 of the support body 1 through a shaft body 61 and one end of the fastening metal fitting 3 is rotatably fixed to the other end of the support body through a shaft body 62 respectively. The support body 1 is urged toward the arrow mark c3 by a second spring 52 and the fastening metal fitting 3 is urged toward the arrow mark c4. A pipe is put between the support body 1 and the cover 2 through the opening thereof and fastened by a bolt 31 and a nut 32 of the fastening metal fitting 3. In this way, the external peripheral face of the pipe is caught by the tops of the projections 4 and joined to the projections with a large bonding pressure and hence, the pipe is prevented from shifting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pipe clamp and a clamp device.

[0002]

2. Description of the Related Art This type of clamp and clamping device are:
It is used when connecting pipes or when connecting other members other than pipes to pipes. Specifically, at a construction site such as a building construction work, a temporary construction work, a civil engineering work, a sewerage work or a river work, it is used for connecting pipes when assembling various pipe structures. More specific examples of use include a transport frame used to construct a scaffolding device for building construction, a building material spacing adjusting member, or other scaffolding members, and these members are used as scaffolding pipes. Can be mentioned.

Generally, a clamp includes a support, a lid,
A fastener is provided, the pipe is sandwiched between the support and the lid, and the support and the lid are fastened by the fastener to be connected to the pipe.

[0004] The receiving surface of the support and the lid that comes into contact with the pipe is a surface corresponding to the outer shape of the pipe. This receiving surface is pressed against the outer peripheral surface of the pipe by a tightening force of a fastener, and the clamp is pressed against the pipe by a frictional force at that time.

The problem of the conventional clamp described above is that the clamp receiving surface is brought into surface contact with the outer peripheral surface of a pipe having a circular outer peripheral surface, and the clamp is pressed against the pipe by frictional force generated at that time. In addition, the crimping force of the clamp on the pipe is weak, and the clamp slides on the pipe, causing a displacement of the clamp.

[0006] The clamp and the clamp device are used for connecting a pipe to a pipe or other members other than the pipe to the pipe. The relationship between the pipes connected together or the relationship between the pipe and other members is broken.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a clamp and a clamp device which can be connected to a pipe with an extremely large crimping force.

[0008] Another object of the present invention is to provide a clamp device that can prevent a displacement between a pipe and a member attached to the pipe.

[0009]

In order to solve the above-mentioned problems, a clamp according to the present invention includes a support, a lid, and a fastener. One end of the lid is axially fixed to one end of the support so that the lid can rotate. At least one of the support and the lid has a large number of projections, and the tops of the projections constitute a pipe receiving portion. The fastener connects the other end of the support and the other end of the lid.

The clamp according to the present invention constitutes a clamp device together with a member combined with the clamp. The clamp device is used when connecting pipes to each other, or when connecting members other than pipes to the pipe. The members associated with the pipe include one or more clamps or other members different from the clamps.

Here, as described above, the clamp according to the present invention includes the support, the lid, and the fastener. The lid is axially fixed to one end of the support so that the lid can be axially rotated. According to this structure, the lid is rotated relative to the support with one end of the lid and the support of the one end of the support as a fulcrum, and the opening between the lid and the support is opened,
Can be left open. Therefore, the pipe can be arranged on the pipe receiving surface of the support through the opening between the lid and the support. Further, by rotating the lid in a direction to close the lid between the support and the support, the pipe can be sandwiched between the support and the lid.

The fastener connects the other end of the support and the other end of the lid. According to this structure, after the pipe is sandwiched between the support and the lid, the support and the lid can be tightened with the fastener.

Further, at least one of the support and the lid has a large number of projections, and the tops of the projections constitute a pipe receiving portion. According to this structure, the top of the projection bites into the outer peripheral surface of the pipe when the support and the lid are fastened by the fastener. Therefore, the clamp according to the present invention
It can be connected to the pipe with an extremely large crimping force. For this reason, an extremely large frictional force is generated between the pipe receiving portion of the clamp and the outer peripheral surface of the pipe, and the displacement of the clamp is prevented.

The clamp and the clamp device according to the present invention are mainly used for a round pipe. However, it can also be used for square pipes. When used for a square pipe, axial displacement can be prevented.

Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings which are embodiments.

[0016]

FIG. 1 is a front view of a clamp according to the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is a sectional view taken along line 3-3 in FIG. The clamp according to the present invention includes a support 1, a lid 2, and a fastener 3. The support 1 is fixed to one end 201 of the lid 2 so that one end 101 can rotate around the axis. Each of the support 1 and the lid 2 has a number of projections 4, and the tops of the projections 4 constitute a pipe receiving portion. The fastener 3 includes the other end 102 of the support 1,
The other end 202 of the lid 2 is connected. The support 1, the lid 2, the fastener 3, and the like constituting the clamp are made of a metal material containing iron as a main component in consideration of required mechanical strength. Usually, an appropriate plating film is formed on the surface.

As shown in FIGS. 1 to 3, the support 1 has a base 11 and ribs 12 and 13. The base 11 is
It is L-shaped as a whole, and is bent so that both ends are located in two directions that are substantially perpendicular to each other. The ribs 12 and 13 are provided at intervals on the base portion 11, and the receiving surface that contacts the pipe is a curved surface corresponding to the outer shape of a pipe (round pipe) having a circular outer peripheral surface. The ribs 12 and 13 are formed by bending opposite sides of the base 11.

The surface of the cover 2 facing the support 1 is substantially arc-shaped. In the embodiment shown in FIGS.
Has ribs 22 and 23 similarly to the support 1. Rib 2
Numerals 2 and 23 are provided at an interval on the lid 2, and a receiving surface that comes into contact with the pipe has a curved surface corresponding to the outer shape of the pipe.

A shaft 61 is fixed to one end 101 of the support 1. The lid part 2 is attached such that one end 201 can rotate with respect to the shaft body 62 in the direction of arrow c1 or arrow c2.

The fastener 3 includes a bolt 31 and a nut 32. A shaft body 62 is fixed to the other end 102 of the support 1, and one end 31 of the bolt 31
Numeral 0 is attached to the shaft 62 so that the shaft can rotate in the direction of arrow c3 or arrow c4. In the embodiment, the fastener 3 is configured by the bolt 31 and the nut 32, but may be configured by other members.

Further, as shown in FIG. 3, the present embodiment includes a first spring 51 and a second spring 52. The first spring 51 is provided on the shaft body 61, applies a spring pressure P11 in the direction of arrow c2 to one end 101 of the support 1, and applies one end 2 of the lid 2.
01 is applied with a spring pressure P12 in the direction of arrow c1. The second spring mechanism 52 is provided on the shaft body 62, applies a spring pressure P21 in the direction of arrow c3 to the other end 102 of the support 1, and applies a spring pressure P22 in the direction of arrow c4 to one end 310 of the bolt 31. Add. However, at least the second spring 52 of the first spring 51 or the second spring 52 may be provided, and the first spring 51 may be omitted. Regarding the operation of the first spring 51 and the second spring 52,
I will explain later.

The projections 4 are provided on the end faces of the ribs 12 and 13 of the support 1 and on the end faces of the ribs 22 and 23 of the lid 2. In the embodiment, the protrusions 4 are provided on the support 1 and the cover 2, but may be provided on at least one of the support 1 and the cover 2.

Next, the specific pattern of the projection 4 and
The cross-sectional shape will be described focusing on the end face 40 of the rib 13. FIG. 4 is a partially enlarged plan view showing a pattern of protrusions, and FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. Rib 1
The description of the protrusions 4 provided on the end surfaces of 2, 22, and 23 will be omitted.

As shown in FIG. 4, the projection 4 is constituted by linear projections 41 and 42 having different inclinations, and the linear projections 41 and 42 intersect the end face 40 of the rib 13 so as to intersect each other. Are located. As shown in FIG. 5, the tops 411 to 414 of the protrusion 41 and the top 42 of the protrusion 42
Reference numerals 1 and 422 denote a pointed end and an end face 4 of the rib 13.
Raised from zero. Such projections 41 and 42 can be easily formed by pressing the end face 40 of the rib 13.

FIG. 6 is a front view for explaining the use state of the clamp according to the present invention, and FIG. 7 is a left side view of FIG. The clamp 71 according to the present invention constitutes the clamp device 9 together with the member 72 combined with the clamp 71. The clamp device 9 has a role of coupling other members other than the pipe to the pipe 8 and a role of connecting the pipe 8 to another pipe. For example, when a member other than the pipe is connected to the pipe 8 in the scaffolding device for building construction work, the main trunk provided in the carrying frame, the building material interval adjusting member, or the like corresponds to the member 72. When connecting the pipe 8 to another pipe, one or a plurality of clamps are connected to the member 7.
Equivalent to 2.

Here, as described above, the lid portion 2 is secured to the one end 101 of the support 1 so that the one end 201 can rotate in the direction of arrow c1 or arrow c2.
According to this structure, the lid 2 is supported on the support 1 by using an axis between the one end 201 of the lid 2 and the one end 101 of the support 1 as a fulcrum.
, The cover 2 can be opened in the open state by rotating the cover 2 in the direction of the arrow c1 to open the space between the cover 2 and the support 1. For this reason, the pipe 8 can be disposed on the pipe receiving surface of the support 1 through the opening between the lid 2 and the support 1. The pipe 8 can be sandwiched between the support 1 and the lid 2 by rotating the lid 2 between the support 1 and the support 1 in the direction of the arrow c2.

The clamp 3 includes the other end 102 of the support 1 and
The other end 202 of the lid 2 is connected. According to this structure,
After the pipe 8 is sandwiched between the support 1 and the lid 2, the support 1 and the lid 2 can be tightened by the fastener 3. 6 and 7 show the state at this time.

Further, each of the support 1 and the lid 2 has a large number of projections 4, and the tops of the projections 4 constitute a pipe receiving portion. According to this structure, the top of the projection 4 bites into the outer peripheral surface of the pipe 8 when the support 1 and the lid 2 are fastened by the fastener 3.

FIG. 8 is an enlarged sectional view of a portion P1 in FIG. Generally, a plating film 802 is attached to an outer peripheral surface 801 of the pipe 8. The plating film 802 can be constituted by a galvanized film formed by an electroless plating method or another plated film formed by electroplating. The plating film 802 is softer than iron or the like forming the clamp. Therefore, as shown in FIG.
And the tops 421 and 422 of the projections 42 bite into the plating film 802 of the pipe 8. Therefore, the clamp 71
It can be connected to the pipe 8 with an extremely large pressing force.
For this reason, when an external force acting to move the clamp 71 acts on the clamp 71 on the pipe 8, the clamp 7
1 pipe receiving portions 411 to 414, 421 and 422
, A very large frictional force is generated between the clamp 71 and the pipe 8, and the displacement of the clamp 71 is prevented.

FIG. 9 is a diagram for explaining the function of the projection. For example, as shown in FIG. 9, even when a large impact F1 is applied from the axial direction of the pipe 8, the mounting position of the clamp 71 is not easily shifted in the axial direction, and large forces F2 and F3 are applied from the circumferential direction of the pipe 8. Even if it is added, its mounting position is unlikely to shift in the circumferential direction. Thus, the clamp 7
1 is hard to be displaced in the axial direction and in the circumferential direction with respect to the attached pipe 8, so that the positional displacement between the pipe 8 and another member (not shown) attached to the pipe 8 can be reduced. Can be prevented.

Next, the operation and effect of the above-described clamp 71 will be described in more detail with reference to an example of an orthogonal clamp which is a typical clamp device 9. FIG. 10 is a diagram showing a clamp device using the clamp according to the present invention. In the figure, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals. In the embodiment shown in FIG.
Is a clamp. The clamp 71 and the clamp of the member 72 are arranged so as to be orthogonal to each other, and are connected by mechanical connection means such as welding or screwing.

FIG. 11 is a view for explaining the use state of the clamp device shown in FIG. In the figure, the same components as those shown in FIGS. 6, 7 and 9 are denoted by the same reference numerals. The orthogonal clamp which is the clamp device 9 is used to connect the pipe 81 and the pipe 82 which are orthogonal to each other. As shown in FIG. 11, the clamp 71 is connected to the pipe 81, and the clamp of the member 72 is connected to the pipe 82.

As described with reference to FIG.
Is that, when a large impact F1 is applied from the axial direction of the pipe 81, its mounting position is not easily shifted in the axial direction. Even when large forces F2 and F3 are applied from the circumferential direction of the pipe 81, its mounting position is Hard to slip. As described above, since the clamp 71 is hardly displaced in the axial direction and is hardly displaced in the circumferential direction with respect to the attached pipe 81, it is possible to prevent the displacement between the pipe 81 and the pipe 82.

Next, returning to FIG. 3 again, the first spring 5
The operation of the first and second springs 52 will be described. In the clamp 71 according to the present invention, the first spring 51 is provided on the shaft body 61, applies a spring pressure P11 in the direction of arrow c2 to one end 101 of the support 1, and applies the spring pressure P11 to one end 201 of the lid 2. Direction spring pressure P12 is applied. According to this structure, the lid 2
As long as no external force in the direction of arrow c2 is applied to the lid 2, the lid 2 is maintained in an open state with respect to the support 1.

The second spring 52 is provided on the shaft 62, applies a spring pressure P21 in the direction of arrow c3 to the other end 102 of the support 1, and applies one end 310 of the bolt 31 in the direction of arrow c4 in the direction of arrow c4. A spring pressure P22 is applied. According to this structure, unless an external force in the direction of arrow c3 is applied to the bolt 31, the bolt 31 is kept open with respect to the support 1.

As described above, by the first spring 51,
The lid 2 is kept open with respect to the support 1, and the second
The bolt 31 is kept open with respect to the support 1 by the action of the spring 52, so that the pipe can be securely placed in the pipe receiving portion of the support 1 when connecting the clamp and the pipe. Can be. Therefore, it is possible to avoid the trouble that has occurred when the conventional clamp is used, and to significantly reduce the labor of the operator.

Next, the clamp 71 according to the present invention will be described with reference to FIG.
The case where the pattern has a pattern different from the pattern of the projections shown in FIG. 5 will be described.

FIG. 12 is a partially enlarged plan view showing a projection pattern different from that shown in FIG. 4, and FIG. 13 is an enlarged sectional view taken along line 13-13 of FIG. In the figure, the same components as those shown in FIGS. 4 and 5 are denoted by the same reference numerals. A feature of the embodiment shown in FIGS. 12 and 13 is that the linear projections 41 and 42 have a saw-tooth pattern. Also in this embodiment, the case where the clamp according to the present invention has the protrusions shown in FIGS.
It has the same effect.

FIG. 14 is a partially enlarged plan view showing a projection pattern different from that of FIG. 4, and FIG. 15 is an enlarged sectional view taken along line 15-15 of FIG. In the figure, the same components as those shown in FIGS. 4 and 5 are denoted by the same reference numerals. A feature of the embodiment shown in FIGS. 14 and 15 is that the point-like projections 43 are arranged on the end face 40 of the rib 13 at a distance from each other. As shown in FIG. 15, the tops 431 to 433 of the protrusion 43 are pointed and protrude from the end surface 40 of the rib 13. Also in the case of this embodiment, the same operation and effect as those in the case where the clamp according to the present invention has the protrusions shown in FIGS.

The projections 4 are shown in FIGS.
-Shapes and patterns other than those shown in FIG. For example, FIG. 16 shows an example in which the projections 4 are configured by a combination of linear projections 42, 43, and 44 having different inclinations, and FIG. 17 shows that the projections 4 have a saw-tooth pattern. Protrusions 41 and 42 and dot-like protrusions 4
3 shows an example constituted by a combination with the third embodiment.

FIG. 18 is a front view showing another embodiment of the clamp according to the present invention. In the figure, the same components as those shown in FIG. 1 are denoted by the same reference numerals. The feature of the embodiment shown in FIG. 18 is that the projections 4 are provided only on the end faces of the ribs 12 and 13 of the support 1. This embodiment also has substantially the same effects as the embodiment shown in FIG. Although not shown, the projections 4 may be provided only on the end faces of the ribs 22 and 23 of the lid 2 in some cases. In this case, the same effects as those of the embodiment shown in FIG. 1 are obtained.

[0042]

As described above, according to the present invention,
The following effects can be obtained. (A) It is possible to provide a clamp and a clamp device that can be coupled to a pipe with an extremely large crimping force. (B) It is possible to provide a clamp device capable of preventing a displacement between a pipe and a member attached to the pipe.

[Brief description of the drawings]

FIG. 1 is a front view of a clamp according to the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a partially enlarged plan view showing a pattern of protrusions.

FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a front view illustrating a use state of the clamp according to the present invention.

FIG. 7 is a left side view of FIG.

FIG. 8 is an enlarged cross-sectional view of a portion P1 in FIG.

FIG. 9 is a diagram illustrating the function of a projection.

FIG. 10 is a diagram showing a clamp device using the clamp according to the present invention.

FIG. 11 is a diagram showing a use state of the clamp device shown in FIG. 10;

FIG. 12 is a partially enlarged plan view showing a projection pattern different from that of FIG. 4;

FIG. 13 is an enlarged sectional view taken along line 13-13 of FIG.

FIG. 14 is a partially enlarged plan view showing a projection pattern different from that of FIG. 4;

FIG. 15 is an enlarged sectional view taken along line 15-15 of FIG. 14;

FIG. 16 is a partially enlarged plan view showing a projection pattern different from that of FIG. 4;

FIG. 17 is a partially enlarged plan view showing a projection pattern different from that of FIG. 4;

FIG. 18 is a front view showing another embodiment of the clamp according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support body 2 Lid part 3 Fastener 4 Protrusion 51 1st spring 52 2nd spring 61,62 Shaft 71 Clamp 72 Member 8 Pipe 9 Clamp device

Claims (12)

[Claims] 1. A clamp including a support, a lid, and a fastener, wherein the lid is axially fixed at one end to one end of the support so as to be rotatable. At least one of the body and the lid has a number of projections, and the top of the projections constitutes a pipe receiving portion. The fastener is the other end of the support and the other end of the lid. And a clamp to combine. 2. The clamp according to claim 1, wherein the protrusion is provided on the support. 3. The clamp according to claim 1, wherein the projection is provided on the lid. 4. The clamp according to claim 1, wherein at least one of the support and the lid is:
A clamp having a rib, wherein the protrusion is provided on an end surface of the rib. 5. The clamp according to claim 1, wherein the top of the projection has a pointed shape. 6. The clamp according to claim 1, wherein the protrusion is linearly arranged. 7. The clamp according to claim 6, wherein the linear projections are at least two types, each having a different inclination. 8. The clamp according to claim 1, wherein the protrusion includes a point-like protrusion. 9. A clamp device comprising at least one clamp and a member combined with the clamp, wherein the clamp is any one of claims 1 to 8. 10. The clamp device according to claim 9, wherein the member is a clamp. 11. The clamp device according to claim 10, wherein the member is the clamp according to any one of claims 1 to 8. 12. The clamp device according to claim 10, wherein the plurality of members are provided.