Clamp, saddle joint and saddle clamp set

Abstract

To provide a clamp capable of preventing a saddle joint from shifting laterally relative to an axial direction of a main pipe, a saddle joint, and a saddle clamp set.SOLUTION: A clamp 20 comprises a band 23, a first clamp piece 21 fixed to a first end part 23a of the band 23, and a second clamp piece 22 fixed to a second end part 23b of the band 23. The first clamp piece 21 extends in a first direction L1 intersecting the band 23, and protrudes from the first end part 23a toward both sides in the first direction L1. The second clamp piece 22 extends in the first direction L1, and protrudes from the second end part 23b toward both sides in the first direction L1.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a clamp, a saddle joint, and a saddle clamp set. [Background technology]

[0002] Conventionally, a clamp including a main body member and a rotating member is known (see, for example, Patent Document 1). The main body member has two band parts arranged with a gap between them, and a first clamp piece (clamp piece) connecting first ends of the two band parts to each other. The rotating member has a shaft part that is arranged in holes formed in the first ends of each of the two band parts. At least one of the two holes has a notch formed therein.

[0003] The clamp is disposed to sandwich the main pipe together with the saddle joint and is attached to the saddle joint. The shaft portion of the rotating member is disposed in the hole through the notch. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2022-015232 Summary of the Invention [Problem to be solved by the invention]

[0005] However, for example, when a saddle joint is installed using the clamp described in Patent Document 1, there is a risk that the saddle joint may shift laterally relative to the axial direction of the main pipe.

[0006] The present invention has been made in consideration of such problems, and has an object to provide a clamp that can prevent a saddle joint from shifting laterally in the axial direction of a main pipe. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following means. (1) A first aspect of the present invention is a clamp comprising a band, a first clamp piece fixed to a first end of the band, and a second clamp piece fixed to a second end of the band, wherein the first clamp piece extends in a first direction intersecting the band and protrudes from the first end on both sides in the first direction, and the second clamp piece extends in the first direction and protrudes from the second end on both sides in the first direction.

[0008] In this invention, the band is connected to the center of the first clamp piece and the second clamp piece in the first direction. Therefore, when the saddle joint is fixed to the main pipe, the saddle body is located on the main pipe, the first clamp piece is located on the first flange, and the second clamp piece is located on the second flange. At this time, with the band located on the opposite side of the saddle body with the pipe in between, the first end of the band is located in a first notch provided in the center of the first flange in the axial direction (first direction), and the second end is located in a second notch provided in the center of the second flange in the axial direction (first direction). As a result, even if the saddle joint tries to shift laterally in the axial direction (first direction) relative to the pipe, the first end is caught in the first notch, and the second end is caught in the second notch. Therefore, it is possible to prevent the saddle joint from shifting laterally relative to the axial direction of the main pipe.

[0009] (2) A second aspect of the present invention may be the clamp according to (1), in which at least one of the first clamp piece and the second clamp piece is provided with a protrusion. When the first clamp piece has a first protrusion, for example, the first protrusion of the first clamp piece fits into a recess provided in the first flange of the saddle joint. This makes it easy to lock the first clamp piece onto the first flange, and the saddle joint can be easily fixed to the main pipe by the clamp. When the second clamp piece has a second convex portion, for example, by appropriately manipulating the second convex portion of the second clamp piece, the first and second flanges of the saddle joint can be positioned between the bands, and the second convex portion can be tilted toward the main pipe to fix the saddle joint to the main pipe. Therefore, the saddle joint can be easily fixed to the main pipe by the clamp.

[0010] (3) A third aspect of the present invention is a saddle joint comprising a saddle body having an arc shape when viewed from a first direction, and a first flange and a second flange protruding from both circumferential ends of the saddle body, wherein a first notch is provided in the center of the first flange in the first direction, and a second notch is provided in the center of the second flange in the first direction. At this time, a notch is provided in the center of the axial direction (first direction) of the first flange and the second flange. Therefore, when the saddle joint is fixed to the main pipe, the saddle body is located on the main pipe, the first clamp piece is located on the first flange, the second clamp piece is located on the second flange, and the band is located on the opposite side of the saddle body with the pipe in between, and the first end of the band is located in the first notch and the second end is located in the second notch. As a result, even if the saddle tries to shift laterally in the axial O1 direction (first direction) relative to the pipe, the first end is caught in the first notch and the second end is caught in the second notch. Therefore, it is possible to prevent the saddle joint from shifting laterally relative to the axial direction of the main pipe.

[0011] (4) A fourth aspect of the present invention may be the saddle joint according to (3), in which at least one of the first flange and the second flange is provided with a recess. At this time, for example, the first convex portion of the first clamp piece fits into the concave portion of the first flange, making it easy to lock the first clamp piece onto the first flange and to easily fix the saddle joint to the main pipe by the clamp.

[0012] (5) A fifth aspect of the present invention is a saddle clamp set comprising a saddle joint to be placed on a pipe and a clamp for fixing the saddle joint to the pipe, the clamp comprising a band, a first clamp piece fixed to a first end of the band, and a second clamp piece fixed to a second end of the band, the first clamp piece extending in a first direction intersecting the band and protruding from the first end on both sides in the first direction, the second clamp piece extending in the first direction and protruding from the second end on both sides in the first direction, the saddle joint comprising a saddle body having an arc shape when viewed from the first direction, and a first flange and a second flange protruding from both ends in the circumferential direction of the saddle body, the first flange having a first notch at the center in the first direction, and the second flange having a second notch at the center in the first direction, a saddle clamp set, wherein when the saddle fitting is secured to the tube, the saddle body is positioned on the tube, the first clamp piece is positioned on the first flange, the second clamp piece is positioned on the second flange, and the band is positioned on the opposite side of the saddle body with the tube in between, with the first end positioned in the first notch and the second end positioned in the second notch. In this invention, the saddle joint can be prevented from shifting laterally relative to the axial direction of the main pipe.

[0013] (6) A sixth aspect of the present invention is a saddle clamp set as described in (5), wherein at least one of the first clamp piece and the second clamp piece is provided with a convex portion, and at least one of the first flange and the second flange is provided with a concave portion, and when the saddle fitting is fixed to the pipe, the convex portion is positioned in the concave portion. In this invention, the saddle joint can be easily fixed to the main pipe by a clamp. Effect of the Invention

[0014] The clamp, saddle joint, and saddle clamp set of the present invention can prevent the saddle joint from shifting laterally relative to the axial direction of the main pipe. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a plan view of a saddle clamp set according to one embodiment of the present invention attached to a main pipe. [Diagram 2] 2 is a view taken in the direction of the arrow A in FIG. 1. [Diagram 3] 2 is a view taken in the direction of the arrow B in FIG. 1. [Figure 4] FIG. 2 is a plan view of a saddle joint according to an embodiment of the present invention placed on a main pipe. [Diagram 5] FIG. 2 illustrates a clamp according to an embodiment of the present invention. [Figure 6] 1 is a first schematic diagram illustrating an example of a structure of a connection portion between a clamp piece and a band. FIG. [Figure 7] 13 is a second schematic diagram illustrating an example of the structure of the connection portion between the clamp piece and the band. FIG. [Figure 8] FIG. 2 is a front view of a saddle clamp set attached to a main pipe in one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of a clamp 20, a saddle joint 10, and a saddle clamp set 1 according to the present invention will be described with reference to FIGS. 1 to 3 and 8, the saddle clamp set 1 of this embodiment is used to connect a branch pipe 102 to a main pipe (piping) 100 through which tap water, gas, etc. flow. The saddle clamp set 1 of this embodiment includes a saddle joint 10 and a clamp 20 of this embodiment. In this embodiment, the saddle joint 10 is an EF joint (electrofusion joint, electric fusion joint). Note that the saddle joint 10 does not have to be an EF joint. The main pipe 100 and the branch pipe 102 are made of a polyolefin resin (for example, a polyethylene resin). The main pipe 100 has a through hole 100a formed in its side surface.

[0017] The saddle joint 10 includes a saddle body 11, a first flange 12, a second flange 13, a branch pipe portion 14, a heating wire (not shown), and two terminals 15. Here, the saddle body 11 is formed in a semi-cylindrical shape, and the main pipe 100 is formed in a tubular shape. The central axes of the saddle body 11 and the main pipe 100 are arranged coaxially with a common axis.

[0018] Hereinafter, the common axis is referred to as the axis O1, and the direction along the axis O1 is referred to as the axis O1 direction (first direction L1). When the saddle clamp set 1 is viewed from the axis O1 direction, the direction perpendicular to the axis O1 is referred to as the radial direction, and the direction going around the axis O1 is referred to as the circumferential direction. The term "semi-cylindrical" used here means the shape of one side of a cylinder divided by a plane including the axis of the cylinder. The side of the through hole 100a with respect to the axis O1 is referred to as a first side D1, and the side opposite to the first side D1 is referred to as a second side D2.

[0019] A through hole 11a is formed in the center of the saddle body 11 in the direction of the axis O1. The saddle body 11 is fused to the outer circumferential surface of the first side D1 of the main pipe 100. The through hole 11a communicates with the through hole 100a of the main pipe 100. The first flange 12 protrudes radially outward from a first circumferential end of the saddle body 11. As shown in Fig. 2, in this example, the length of the first flange 12 in the axis O1 direction and the length of the saddle body 11 in the axis O1 direction are equal to each other. In other words, the saddle body 11 does not protrude beyond the first flange 12 on either side in the axis O1 direction. As shown in Fig. 1, the second flange 13 protrudes radially outward from an end portion of the saddle body 11 on a second side opposite to the first side in the circumferential direction. As shown in Fig. 3, in this example, the length of the second flange 13 in the axis O1 direction and the length of the saddle body 11 in the axis O1 direction are equal to each other. In other words, the saddle body 11 does not protrude beyond the second flange 13 on either side in the axis O1 direction.

[0020] 1 to 3, the branch pipe section 14 extends radially outward from the periphery of the opening of the through hole 11a of the saddle body 11. The branch pipe section 14 has a connection section 14a which is a socket. An end of a branch pipe 102 is connected to the connection section 14a. The saddle body 11, the first flange 12, the second flange 13, and the branch pipe portion 14 are formed from the same resin as the main pipe 100. The heating wire is embedded in the saddle body 11. The two terminals 15 are disposed on the outer circumferential surface of the saddle body 11 so as to sandwich the branch pipe portion 14 in the direction of the axis O1. The two terminals 15 are respectively connected to ends of the heating wire.

[0021] In this embodiment, a first notch 16 is provided in the center of the first flange 12 in the axis O1 direction, and a second notch 17 is provided in the center of the second flange 13 in the axis O1 direction. The first notch 16 penetrates the first flange 12 in the up-down direction. The first notch 16 opens toward the outside in the radial direction. The second notch 17 penetrates the second flange 13 in the up-down direction. The second notch 17 opens toward the outside in the radial direction. In addition, two recesses 18 are provided in the first flange 12 symmetrically with respect to the first notch 16. The two recesses 18 are provided so as to be able to fit into two first protrusions 21a of a first clamp piece 21 described later. The two recesses 18 open toward the upper side. The recesses 18 of the first flange 12 may not be provided. For example, the number of recesses 18 in the first flange 12 may be one, or a plurality of recesses 18 may be provided. The arrangement of the recesses 18 in the first flange 12 is not particularly limited, and they do not have to be symmetrical.

[0022] The clamp 20 in this embodiment is shown in FIG. The clamp 20 includes a band 23 and two clamp pieces 21, 22. The two clamp pieces 21, 22 include a first clamp piece 21 fixed to a first end portion 23a of the band 23, and a second clamp piece 22 fixed to a second end portion 23b of the band 23. The clamp pieces 21, 22 are formed in a rectangular parallelepiped shape from, for example, resin.

[0023] 5 is referred to as a first direction L1. When the saddle clamp set 1 is installed on the main pipe 100, the first direction L1 is the same as the direction of the axis O1.

[0024] The first clamp piece 21 extends in a first direction L1 intersecting the band 23 and protrudes from a first end 23a on both sides in the first direction L1, while the second clamp piece 22 extends in the first direction L1 and protrudes from a second end 23b on both sides in the first direction L1. In other words, both ends of the band 23 are provided in the center of the clamp pieces 21, 22.

[0025] In this embodiment, the band 23 is a wire rope (JIS G 3525:2013). If the band 23 is a wire rope, the band 23 portion can be folded, and the clamp 20 can be made compact, for example, when transporting, which is preferable. The wire rope may be, for example, a steel wire constituting a strand, a bare wire that is not plated, or a zinc-plated wire. However, the band 23 is not limited to a wire rope.

[0026] 6 and 7 show an example of the structure of the connection between the band 23 and the clamp pieces 21 and 22. As shown in FIG. 6, for example, a hole may be provided in the center of the clamp pieces 21 and 22 in the first direction L1, and the band 23 having both ends formed into rings may be connected to the clamp pieces 21 and 22. In this case, it is preferable that the ring parts at both ends of the band 23 are attachable to and detachable from the hole. Alternatively, as shown in FIG. 7, a hole penetrating the clamp pieces 21 and 22 in the first direction L1, a rod inserted into the hole, and a notch in the center of the clamp pieces 21 and 22 in the first direction L1 may be provided, and the band 23 having both ends formed into rings may be passed through the rod to connect to the clamp pieces 21 and 22. In this case, for example, the rod may be integrally formed with the clamp pieces 21 and 22, and the ring parts at both ends of the band 23 may be attachable to and detachable from the rod. For example, the rod may be detachable from the clamp pieces 21 and 22. If the rod is removable from the clamp pieces 21, 22, the band 23 can be attached to the clamp pieces 21, 22 by passing the rod through the annular portion at the end of the band 23 and attaching the rod to the clamp pieces 21, 22.

[0027] The first clamp piece 21 is provided with two first protrusions 21a that can be fitted into the two recesses of the first flange 12 described above. In this embodiment, the two first protrusions 21a are provided symmetrically with respect to the first end 23a of the band 23. The arrangement and number of the first protrusions 21a are not limited, but it is preferable that the same number of first protrusions 21a are provided at positions corresponding to the recesses of the first flange 12. For example, the number of first protrusions 21a may be one, or multiple first protrusions 21a may be provided. The first protrusions 21a do not have to be provided symmetrically.

[0028] A second protrusion 22a is provided at the center in the first direction L1 of the second clamp piece 22. The second protrusion 22a functions as a lever, as will be described later.

[0029] In this embodiment, the first protrusion 21a and the second protrusion 22a do not necessarily have to be provided.

[0030] Next, the saddle clamp set 1 when the clamp 20 is installed on the saddle joint 10 will be described. 2 and 3, the first clamp piece 21 and the second clamp piece 22 extend in the direction of the axis O1. When viewed in the direction of the axis O1, the first clamp piece 21 and the second clamp piece 22 have a rectangular shape. The first clamp piece 21 is engaged with the first side D1 of the first flange 12. At this time, the first convex portion 21a of the first clamp piece 21 fits into the first concave portion of the first flange 12. The second clamp piece 22 is engaged with the first side D1 of the second flange 13. As shown in Figs. 2 and 3, the band 23 passes through the first notch 16 and the second notch 17 to connect the first clamp piece 21 and the second clamp piece 22. As shown in Fig. 8, the band 23 is arranged to cover the outer circumferential surface of the second side D2 of the main pipe 100.

[0031] The second protrusion 22a of the second clamp piece 22 is formed in a flat plate shape. As shown in Fig. 5, the second protrusion 22a extends in a direction perpendicular to the second clamp piece 22 from a middle part of the second clamp piece 22 in the direction of the axis O1. 8, the second protrusion 22a of the second clamp piece 22 is formed to lean toward the saddle body 11 when viewed from the axis O1 direction. Therefore, when the second clamp piece 22 provided with the second protrusion 22a is viewed from the axis O1 direction, the connection portion between the second protrusion 22a and the second clamp piece 22 has an L-shaped bent shape.

[0032] As described above, the clamp 20 is attached to the saddle joint 10 with the main pipe 100 sandwiched between the clamp 20 and the saddle joint 10 by the band 23, the first clamp piece 21, and the second clamp piece 22.

[0033] Next, a description will be given of a procedure for attaching the saddle clamp set 1 configured as above to the main pipe 100. Note that, at the beginning of the procedure below, the through hole 100a is not formed in the main pipe 100.

[0034] As shown in FIG. 8, the saddle body 11 of the saddle joint 10 is placed on the outer circumferential surface of the first side D1 of the main pipe 100. The first clamp piece is engaged with the first flange 12 of the saddle joint 10 from the first side D1 of the first flange 12. The band 23 is passed through the first notch 16 of the first flange 12, and the band 23 is wrapped around the outer circumferential surface of the second side D2 of the main pipe 100. The band 23 is passed through the second notch 17, and the second clamp piece 22 connected to the second end 23b of the band 23 is placed on the second flange 13. In this state, the band 23 is loose, and the second convex portion 22a of the second clamp piece 22 is in a lying position toward the second flange 13 side. By appropriately operating the second convex portion 22a (lever) of the second clamp piece 22 to tilt (raise) it toward the main pipe 100, tension is applied to the band 23 and the first flange 12 and second flange 13 of the saddle joint 10 are positioned between the band 23.

[0035] An electric fusion device (not shown) is connected to the two terminals 15 of the saddle joint 10, and a predetermined amount of power is applied between the two terminals 15. The saddle body 11 of the saddle joint 10 is fused to the main pipe 100. A through hole 100a is formed in the main pipe 100 by using a known tool (not shown) through the inside of the branch pipe portion 14. A branch pipe 102 is connected to the connection portion 14a of the saddle joint 10. Through the above steps, the saddle clamp set 1 is attached to the main pipe 100.

[0036] As described above, the clamp 20 of this embodiment comprises a band 23, a first clamp piece 21 fixed to a first end 23a of the band 23, and a second clamp piece 22 fixed to a second end 23b of the band 23, with the first clamp piece 21 extending in a first direction L1 intersecting the band 23 and protruding from the first end 23a on both sides in the first direction L1, and the second clamp piece 22 extending in the first direction L1 and protruding from the second end 23b on both sides in the first direction L1. At this time, the clamp 20 may have a structure in which the band 23 is connected to the center of the first clamp piece 21 and the second clamp piece 22 in the first direction L1.

[0037] The saddle joint 10 of this embodiment comprises a saddle body 11 having an arc shape when viewed from a first direction L1, and two flanges, a first flange 12 and a second flange 13, protruding from both circumferential ends of the saddle body 11, with a first notch 16 provided in the center of the first direction L1 of the first flange 12, and a second notch 17 provided in the center of the first direction L1 of the second flange 13. In this case, the saddle joint 10 may have a structure in which a notch is provided in the center of the first flange 12 and the second flange 13 in the direction of the axis O1 (first direction L1).

[0038] Therefore, when the saddle joint 10 is fixed to the main pipe 100, the saddle body 11 is located on the main pipe 100, the first clamp piece 21 is located on the first flange 12, the second clamp piece 22 is located on the second flange 13, and the band 23 is located on the opposite side of the saddle body 11 with the pipe in between, the first end 23a of the band 23 is located in the first notch 16, and the second end 23b is located in the second notch 17. As a result, even if the saddle joint tries to shift laterally in the axis O1 direction (first direction L1) relative to the pipe, the first end 23a is caught in the first notch 16, and the second end 23b is caught in the second notch 17. Therefore, it is possible to prevent the saddle joint from shifting laterally with respect to the axis O1 direction of the main pipe 100.

[0039] In the clamp 20 of this embodiment, the first clamp piece 21 and the second clamp piece 22 are provided with protrusions. The first clamp piece 21 has a first protrusion 21a. At this time, the first protrusion 21a of the first clamp piece 21 fits into a recess provided in the first flange 12 of the saddle joint 10. This makes it easy to lock the first clamp piece 21 onto the first flange 12, and the saddle joint 10 can be easily fixed to the main pipe 100 by the clamp 20. The second clamp piece 22 has a second convex portion 22a. At this time, by appropriately manipulating the second convex portion 22a of the second clamp piece 22, the first flange 12 and the second flange 13 of the saddle fitting 10 can be disposed between the bands 23, and the second convex portion 22a can be tilted toward the main pipe 100 to fix the saddle fitting 10 to the main pipe 100. Therefore, the saddle fitting 10 can be easily fixed to the main pipe 100 by the clamp 20.

[0040] In this embodiment, a recess is provided in the first flange 12 of the saddle fitting 10. At this time, the first protrusion 21a of the first clamp piece 21 fits into the recess of the first flange 12. This makes it easy to lock the first clamp piece 21 onto the first flange 12, and the saddle fitting 10 can be easily fixed to the main pipe 100 by the clamp 20.

[0041] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and changes, combinations, deletions, etc. of the configuration are also included within the scope that does not deviate from the gist of the present invention.

[0042] For example, the band 23 may be flat. Here, flat means that the relationship between the thickness and width of the band 23 in a cross-sectional view is thickness<width. In this way, if the band 23 is flat, the band 23 is less likely to twist even if a force in the direction of the axis O1 acts on the saddle joint 10 after it is fixed to the main pipe 100, and the saddle joint 10 can be prevented from shifting laterally relative to the direction of the axis O1 of the main pipe 100.

[0043] For example, the second flange 13 may be provided with a recess, and the second clamp piece 22 may be provided with a third protrusion that can be engaged with the recess of the second flange 13 . [Explanation of symbols]

[0044] 1 Saddle Clamp Set 10 Saddle joint 11 Saddle body 12 First Guard 13 Second Guard 16 First notch 17 Second notch 20 Clamp 21 First clamp piece 21a First protrusion 22 Second clamp piece 22a Second protrusion 23 Bands 23a First end 23b Second end 100 pipes

Claims

1. With the band, a first clamp piece secured to a first end of the band; a second clamp piece secured to a second end of the band; The first clamp piece extends in a first direction intersecting the band and protrudes from the first end on both sides in the first direction, The second clamp piece extends in the first direction and protrudes from the second end on both sides in the first direction.

2. The clamp according to claim 1 , wherein at least one of the first clamp piece and the second clamp piece is provided with a protrusion.

3. A saddle body having an arc shape when viewed from a first direction; a first flange and a second flange protruding from both circumferential ends of the saddle body; A first notch is provided at a center of the first flange in the first direction, A saddle joint, wherein a second notch is provided at the center of the second flange in the first direction.

4. The saddle joint according to claim 3 , wherein at least one of the first flange and the second flange is provided with a recess.

5. a saddle fitting disposed on the pipe; a clamp for securing the saddle fitting to the pipe, The clamp is With the band, a first clamp piece secured to a first end of the band; a second clamp piece secured to a second end of the band; The first clamp piece extends in a first direction intersecting the band and protrudes from the first end on both sides in the first direction, The second clamp piece extends in the first direction and protrudes from the second end on both sides in the first direction. The saddle joint comprises: A saddle body having an arc shape when viewed from the first direction; a first flange and a second flange protruding from both circumferential ends of the saddle body; A first notch is provided at a center of the first flange in the first direction, A second notch is provided at a center of the second flange in the first direction, a saddle clamp set, wherein when the saddle fitting is secured to the tube, the saddle body is positioned on the tube, the first clamp piece is positioned on the first flange, the second clamp piece is positioned on the second flange, and the band is positioned on the opposite side of the saddle body with the tube in between, with the first end positioned in the first notch and the second end positioned in the second notch.

6. At least one of the first clamp piece and the second clamp piece is provided with a protrusion, At least one of the first flange and the second flange is provided with a recess, The saddle clamp set according to claim 5 , wherein the protrusion is disposed in the recess when the saddle fitting is secured to the pipe.

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