JP2014040898A - Fixation method of saddle shape joint - Google Patents

Abstract

An object of the present invention is to make it easy to carry to a construction site by suppressing the weight and bulk of a fixing jig itself, and to hold a saddle part uniformly and stably on an outer peripheral surface of a tubular body.
A saddle type joint B having a saddle portion B1 fused to an outer peripheral surface of a tube body C and a branch portion B2 formed integrally with the saddle portion B1 is fixed to the outer peripheral surface of the tube body C. Then, using the flexible linear member 1 wound in the circumferential direction of the tubular body C, the flexible linear member 1 is piped over the saddle part B1 or the branch part B2. The saddle portion B1 is fixed to the outer peripheral surface of the tubular body C by winding in the circumferential direction of the body C and tightening the wound flexible linear member 1.
[Selection] Figure 3

Description

  The present invention relates to a fixing method for fixing a saddle type joint to a pipe body when the saddle type joint is fused to the outer peripheral surface of the pipe body.

  For example, when a saddle-type joint is fused to the outer peripheral surface of a tubular body (such as a gas conduit or a water pipe) made of a thermoplastic resin material such as polyethylene, the saddle portion of the joint is used until the fusion is completed and cooling is completed. Needs to be fixed in close contact with the outer peripheral surface of the tubular body. Conventionally, various special jigs are used for this fixing. Moreover, the fixing jig as described in the following patent documents 1-3 is proposed for this fixation.

  The saddle clamp described in Patent Document 1 includes an engagement piece that engages with one side of a saddle portion of a saddle-type joint, a chain that has one end connected to the engagement piece, and the other end of the chain. And a pressing mechanism that presses the pressing piece against the side wall of the saddle portion and generates tension in the chain.

  In the fixing jig described in Patent Document 2, two pressing bodies that press both sides of the saddle portion in the tube axis direction are connected by two chains wound around the saddle portion and the circumferential direction of the tube body. Thus, a square saddle pressing tool is configured, and a clamping tool (fastening tool) for attaching the saddle pressing tool to the tube is attached between the pressing bodies.

  The mounting jig described in Patent Document 3 includes a fixing member that is fixed to a saddle portion or a branch portion, and a pair (two) that are wound around the outer peripheral surface of a tubular body with both ends supported by the fixing member. And a tightening means for tightening the pair of chains to apply a pressing force from the fixing member to the saddle joint.

JP 2000-334845 A JP 2004-197775 A JP 2007-298146 A

  The prior art described in Patent Document 1 is a dedicated fixing jig for a saddle-type joint having flanges on both sides of the saddle portion, and an engagement piece provided at one end of the chain and a press provided at the other end of the chain There is a problem that it cannot be applied to a saddle-type joint that does not have a flange for engaging the pieces.

  In both of the prior arts described in Patent Documents 2 and 3, the saddle joint can be fixed to the outer peripheral surface of the tubular body even if there are no flanges on both sides of the saddle portion in the tube axis direction. However, the conventional technique described in Patent Document 2 needs to include a saddle pressing tool, and the conventional technique described in Patent Document 3 needs to include a fixing member having a cap portion and an overhang portion. The number of components is large, resulting in a problem that the structure is complicated and expensive. In addition, the saddle pressing tool and the fixing member increase the weight and bulk of the fixing jig itself. There is a problem that can not be carried easily.

  An object of the present invention is to solve such problems. In other words, the saddle type joint fixing method can be applied to saddle type joints having no flanges on both sides of the saddle part, the structure is simple and can be used at a relatively low cost, It is an object of the present invention to reduce the weight and bulk width of the jig itself to make it easy to carry it to the construction site, and to press and fix the saddle portion uniformly and stably to the outer peripheral surface of the tubular body.

In order to achieve such an object, the saddle joint fixing method according to the present invention includes at least the following configuration.
A saddle type joint having a saddle portion fused to an outer peripheral surface of a tubular body and a branch portion integrally formed with the saddle portion is fixed to the outer peripheral surface, and is wound in the circumferential direction of the tubular body. Using the flexible linear member to be rotated, the flexible linear member was wound in the circumferential direction of the tubular body so as to be stretched over the saddle portion or the branch portion. The saddle-shaped joint fixing method, wherein the saddle portion is fixed to the outer peripheral surface of the tubular body by tightening the flexible linear member.

According to the fixing method of the saddle joint according to the present invention having such characteristics, the following operational effects can be obtained.
The saddle type joint fixing method can also be applied to a saddle type joint having no saddle parts on both sides of the saddle part. It has a simple structure and can be used at a relatively low cost. Carrying to the construction site becomes easier by reducing the weight and bulk of the fixture itself. The saddle portion can be pressed and fixed uniformly and stably on the outer peripheral surface of the tubular body.

It is explanatory drawing which shows an example of the fixing device applied to the fixing method of the saddle type joint which concerns on embodiment of this invention. It is explanatory drawing (perspective view) which showed the example of the form of the saddle type coupling of fixation object. It is sectional explanatory drawing of the state which fixed the saddle type joint to the outer peripheral surface of a pipe body. It is a plane explanatory view of the fixed state. It is a perspective view which shows the saddle type coupling provided with the locking groove in the saddle part. It is a perspective view which shows the saddle type coupling provided with the latching protrusion in the saddle part. It is a plane explanatory view showing the state where the saddle type joint is fixed to the outer peripheral surface of the tubular body.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is an explanatory view showing an example of a fixing device applied to a method for fixing a saddle joint according to an embodiment of the present invention. The fixing method of the saddle type joint according to the embodiment of the present invention uses the flexible linear member 1 wound in the circumferential direction of the tubular body, and is stretched over the saddle part or the branch part. The flexible linear member 1 is wound in the circumferential direction of the tubular body, and the wound flexible linear member 1 is tightened to fix the saddle portion to the outer peripheral surface of the tubular body. A fixing device A for performing this fixing method includes a saddle portion of a saddle-shaped joint and a flexible linear member 1 wound in the circumferential direction of the tubular body, and the wound flexible linear member 1. And a tightening tool 2 for tightening.

  In the illustrated example, the flexible linear member 1 is a chain, and includes a connecting ring 3 at one end thereof. The connection ring 3 is for connecting to a hook portion 4 described later on the fastening tool 2 side. The flexible linear member 1 is wound around the tubular body so that the saddle-shaped joint is placed on the fused portion of the tubular body so as to be stretched over the saddle portion or the branching portion. Is connected to the hook portion 4. Note that the number of connecting rings 3 is not limited to one, and a plurality of connecting rings 3 may be provided. The flexible linear member 1 is not limited to a chain, and may be a string-like member. In addition to the chain, a chain, a wire rope, an annealed iron wire, a band iron band, a rassin belt, a high-tensile resin wire, or the like can be used.

  Although the illustration of a specific internal structure (retraction mechanism of the flexible linear member 1) is omitted, the tightening tool 2 is not provided with the flexible linear member on the main body portion 6 including the hook portion 4 and the handle 5. By inserting 1 in a penetrating manner, the feeding length L from the main body portion 6 of the flexible linear member 1 provided with the connecting ring 3 is drawn and shortened by operating the handle 5. That is, in the tightening tool 2, one end side of the flexible linear member 1 having the connection ring 3 shown in FIG. 1 is drawn into the main body 6 by the operation of the handle 5, and accordingly penetrates the main body 6. The length of the other end side of the flexible linear member 1 is extended.

  FIG. 2 is an explanatory view (perspective view) showing a configuration example of a saddle-type joint to be fixed. The saddle-shaped joint B includes an arc plate-shaped saddle portion B1 and a branch portion B2 formed integrally with the saddle portion B1. Although not shown in the figure, a heating element such as a resistance wire is embedded in the joint surface of the saddle part B1 with the tube, and an electrode terminal for energizing the heating element is provided in the saddle part B1. Has been deployed. In the example shown in the figure, locking recesses 7 that are locking portions for holding the flexible linear member 1 are provided on both sides of the saddle portion B1. In the following description, an example including a locking portion will be described. However, the method for fixing a saddle-shaped joint according to an embodiment of the present invention is not applicable only to a saddle-shaped joint including a locking portion. Applicable to saddle type joints. The locking portion here can be applied by cutting the saddle portion B1 or the branching portion B2 at the time of construction, but can also be fixed without providing such a locking portion.

  The locking recess 7 is flexible as a winding position positioning (marker) when the flexible linear member 1 is stretched in parallel on the front and rear sides in the tube axis direction of the saddle portion B1 sandwiching the branching portion B2. It is a dent for locking the linear member 1 along. The engaging recess 7 is formed at a position where the entire joining surface of the saddle portion B1 can be pressed and fixed uniformly and stably in an intimate contact with the outer peripheral surface of the tubular body. Thereby, it becomes possible to perform uniform and stable fixing regardless of individual differences among workers who perform the work.

  FIG. 3 is a cross-sectional explanatory view showing a state in which the saddle-type joint is fixed to the pipe body, and FIG. 4 is a plan explanatory view thereof. Based on FIG.3 and FIG.4, the method to fix the saddle type joint B to the pipe body C using the fixing device A mentioned above is demonstrated.

  The saddle joint B is placed on the outer peripheral surface of the tube C, and the flexible linear member 1 is hung in parallel at two locations of the saddle portion B1 sandwiching the branch portion B2 using two sets of fixing devices A. (See Fig. 4). At this time, when the locking recess 7 is provided in the saddle portion B1, the flexible linear member 1 is stretched over the locking recess 7 so as to be locked. Then, the flexible linear member 1 is tightened in the circumferential direction by the tightening tool 2 in a state in which the flexible linear member 1 is wound in the circumferential direction of the saddle portion B1 and the tubular body C (see FIG. 3). ).

  According to this, the saddle portion B1 is pressed onto the outer peripheral surface of the tubular body C by the flexible linear member 1 spanned in parallel at two places before and after the branching portion B2, and the entire joining surface of the saddle portion B1 is pressed. The saddle joint B can be fixed to the pipe C in a state where the pipe is uniformly and stably adhered to the outer peripheral surface of the pipe C. In particular, when the locking recess 7 is provided, the winding position of the saddle portion B1 and the tubular body C in the circumferential direction is positioned by the locking recess 7, so that individual differences among workers who perform the work, etc. Regardless of whether or not, uniform and stable fixation becomes possible.

  FIG. 5 is a perspective view showing a saddle-shaped joint provided with a locking groove in the saddle portion. Instead of the locking recess 7 described above, a locking groove 8 provided on the outer surface of the saddle portion B1 can be provided as shown in FIG. The locking groove 8 is formed so that the flexible linear member 1 of the fixing device A spanned in the circumferential direction of the outer surface of the arc of the saddle portion B1 is locked. Thus, when the flexible linear member 1 is wound in the circumferential direction of the saddle portion B1 and the tubular body C, the entire joining surface of the saddle portion B1 is uniformly and stably adhered to the outer circumferential surface of the tubular body C. Therefore, the flexible linear member 1 can be more accurately routed at the set winding position on the saddle portion B1.

  FIG. 6 is a perspective view showing a saddle-type joint provided with a locking projection on the saddle part, and FIG. 7 is an explanatory plan view showing a state in which the saddle-type joint is fixed to the outer peripheral surface of the tubular body. As shown in FIG. 6, the latching convex part 9 which is a latching part can be provided in the both sides of saddle part B1. As shown in FIG. 7, the locking protrusion 9 intersects the circumference of the branch portion B <b> 2 of the saddle-shaped joint B to cross the flexible linear member 1, so that the two sets of the fixing device A are used. This is effective for locking the flexible linear members 1 respectively.

  The fixing method shown in FIG. 7 uses two sets of fixing devices A, crosses the flexible linear member 1 along the periphery of the branch portion B2, and spans the saddle portion B1 and the circumferential direction of the tubular body C. The flexible linear member 1 is wound around and the saddle portion B1 is pressed and fixed to the outer peripheral surface of the tubular body C. By adopting such a fixing method, the adhesion of the entire joining surface of the saddle portion B1 to the outer peripheral surface of the tube C, as well as the adhesion to the outer peripheral surface of the tube C around the branch portion B2, can be further stabilized. . That is, the periphery of the branch portion B1 can be firmly and more stably fused to the outer peripheral surface of the tubular body C.

  The protruding shape of the locking projection 9 is not particularly limited to the illustrated example, and is arbitrary, for example, circular (columnar) or trapezoidal. Also, the two locking projections 9 formed on one side of the saddle portion B1 shown in FIG. 6 can be made into one locking projection having a predetermined width along the tube axis direction.

  In the above description, the example in which the flexible linear member 1 is wound around the saddle portion B1 and wound around the tubular body C has been described. However, the present invention is not limited thereto, and the flexible linear member 1 is connected to the branch portion B2. The saddle-shaped joint B can be fixed to the tubular body C by being wound around and wound around the tubular body C and tightening the flexible linear member 1. In this case, since the opening end of the branch part B2 is easily deformed, in order to protect the opening end, it is preferable to cover the opening end with a cushioning material and to hang the flexible linear member 1 thereon. In a so-called bypass saddle or the like, a cap is attached to the opening end of the branch portion B2, so that the flexible linear member 1 can be passed over the cap with the cap as a cushioning material.

  As described above, according to the method for fixing the saddle-shaped joint B to the pipe body C according to the present embodiment, the flexible linear member 1 is placed over the saddle part B1 or the branch part B2. Since the saddle portion B1 is fixed to the outer peripheral surface of the tubular body C by winding the tubular linear body C in the circumferential direction and tightening the wound flexible linear member 1, the flexible linear member is basically provided. The fixing operation can be completed by a simple operation of winding 1 and tightening. Such a method for fixing the saddle type joint is also applicable to a saddle type joint in which there are no flanges on both sides of the saddle part. Since the fixing jig to be used only needs to have the flexible linear member 1 with the fastening tool 2, the structure of the fixing jig is simple and can be used at a relatively low cost. Further, the weight and bulk of the fixing jig itself can be suppressed, and it can be easily carried to the construction site. Further, since the saddle joint B can be pressed directly onto the tube body C from above the saddle portion B1 and the branch portion B2, the saddle portion B1 can be pressed and fixed uniformly and stably on the outer peripheral surface of the tube body C. .

  In addition, by providing the saddle portion B1 with a locking portion such as the locking recess 7, the locking groove 8, or the locking projection 9, a uniform and stable state can be obtained regardless of individual differences among workers performing the work. The saddle type joint B can be fixed to the outer peripheral surface of the tube C.

  Moreover, by using the flexible linear member 1, the length when winding in the circumferential direction of the tubular body C can be set steplessly. That is, regardless of the outer diameter of the tubular body C and the thickness of the saddle portion B1, the outer diameter is different for one set of fixing devices A (one flexible linear member 1 and one tightening tool 2). The saddle type joint B can be fixed to any tube C.

  The embodiments of the present invention have been described in detail above, but the specific configuration is not limited to these embodiments, and design changes and the like within a scope not departing from the gist of the present invention described in the claims can be made. Even if it exists, it is included in this invention. In addition, the embodiments shown in each drawing can be combined with each other unless there is a particular contradiction or problem in the purpose and configuration. Moreover, the description content of each figure can become independent embodiment, respectively, and embodiment of this invention is not limited to one embodiment which combined each figure.

A: Fixing device 1: Flexible linear member 2: Fastening tool 7: Locking recess (locking portion)
8: Locking groove (locking part) 9: Locking convex part (locking part) B: Saddle type joint B1: Saddle part B2: Branch part C: Tube

Claims (7)

A fixing method for fixing a saddle joint having a saddle portion fused to an outer peripheral surface of a tubular body and a branch portion formed integrally with the saddle portion to the outer peripheral surface,
A flexible linear member wound in the circumferential direction of the tubular body is used, and the flexible linear member is wound around the saddle portion or the branch portion so as to be wound around the tubular body. A saddle-type joint fixing method, wherein the saddle portion is fixed to an outer peripheral surface of the tubular body by winding in a direction and fastening the wound flexible linear member.   The saddle-type joint fixing method according to claim 1, wherein the saddle portion or the branching portion has a locking portion that holds the flexible linear member. The flexible linear member is stretched over at least the saddle portion;
The saddle-type joint fixing method according to claim 2, wherein the locking portion is a locking convex portion or a locking concave portion provided on a side portion of the saddle portion. The flexible linear member is stretched over at least the saddle portion;
The saddle-type joint fixing method according to claim 2, wherein the locking portion is a locking groove provided on an outer surface of the saddle portion. The flexible linear member is stretched over at least the saddle portion;
The saddle-type joint fixing method according to any one of claims 1 to 4, wherein the flexible linear member is stretched in parallel on both sides of the branch portion. The flexible linear member is stretched over at least the saddle portion;
The saddle-type joint fixing method according to any one of claims 1 to 4, wherein the flexible linear member is stretched across the periphery of the branch portion.   The saddle according to any one of claims 1 to 6, wherein the flexible linear member includes any one of a chain, a chain, a wire rope, an annealed iron wire, a belt-like band, and a high-tensile resin wire. How to fix the shape joint.

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