JPH071588Y2 - Pipe branch joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pipe branch joint for providing a new pipe line in the other direction from the midway position of the pipe line, and more specifically to the disposition of an existing pipe line. The present invention relates to a conduit branch joint that can easily change the direction or add a branch conduit.

[Prior Art] When burying a communication cable or a power line in the ground, a synthetic resin pipe for cable protection is generally used. 7th
Figure is a plan view showing a conduit using a plurality of pipe 1 piece receiving piece insertion type, pipe 1 group shown by a solid line shows a main pipe M _L of existing. And for example, when constructing a new building N ₁ indicated by a dotted line in a position away from such main pipe M _L is, it is necessary to newly laying branch line S _L indicated by a dashed line. Or, the terminal side M _L0 of the main line M _L is closed at an arbitrary position and the branch line S
Even when changing completely transferred to the _L side, necessary to connect the same branch pipe S _L while leaving the pipe root side M _L1 in the pipe based side M _L1 occurs.

In providing the branch line S _L , one pipe body 1 at an appropriate position in the main line M _L is cut off between C and C, and the Y-shaped pipe branch joint 2 is connected to this C line. The method of replenishing between -C is adopted.

As the pipe branching joint 2, the one shown in JP-A-63-43514 is used, and FIG. 8 is an explanatory view showing an example of the pipe branching joint 2. That is, the pipe branch joint 2 is formed by integrally forming the main pipe portion 10 and the branch pipe portion 20, and the main pipe portion 10 is divided into two at a cutting line K along the longitudinal direction of the pipe axis. Side gutter type piece 10A and branch side gutter type piece 10B
It is divided into Both ends of the main pipe portion 10 are respectively joined to the remaining pipe bodies 1 and 1 via joints 4 and 4. The joint 4 has a collar joint structure in which a gutter-shaped member divided vertically into two is faced and joined.

[Problems to be solved by the invention] Therefore, when joining the gutter-shaped pieces 10A and 10B to a pipe, an adhesive is applied to the joint end surfaces (cutting line K) of both to form the pipe branch joint 2. Further, a means for joining the pipes 1, 1 while making both ends of the joints 4, 4 from the outside by tightening the joints 4, 4 is adopted. However, since the gutter-shaped pieces 10A and 10B are formed to be relatively long in the tube axis direction, they may be slightly deformed due to thermal strain or stress strain during storage, so that the joining end faces can be accurately joined at the cutting line K. It is difficult to bring them into close contact with each other, and the bonding with the adhesive is incomplete, and an unbonded opening gap is generated in the bonding part, or the bonding part peels off during embedding due to insufficient adhesion. There was a risk of causing inconvenience.

In order to reinforce the connection by the adhesive, a means for winding a binding band (shown by a chain line B in FIG. 8) such as a steel wire or a stainless steel belt around the outer circumference of the gutter-shaped pieces 10A, 10B is also used. Sometimes. However, the crossing angle between the main pipe part 10 and the branch pipe part 20 is generally set to about 10 degrees in consideration of the insertability of a cable or the like to be inserted inside, and the binding band is attached to the inclined part of the branch pipe part 20. Therefore, there is a problem that the binding band slips and moves on the inclined portion and loses the winding force.

Therefore, the inventors of the present invention have developed a conduit branch joint 2 that can firmly bond the joint end surfaces of the gutter-shaped piece to each other and can keep the binding band at an appropriate position to maintain a sufficient tightening effect. The invention was completed after repeated efforts for the purpose of providing it.

[Means for Solving the Problems] In the present invention which has achieved the above object, one of the two trough-shaped pieces obtained by dividing the tubular body in the axial direction of the tubular body has a groove bottom portion. The branch pipe part is integrally joined in a Y shape, and one of the gutter-shaped pieces is provided with guide pieces attached to the outer sides of both walls so as to project from the gutter open surface, and further on the outer peripheral surface of the branch pipe line. The gist of the present invention is that a fixing piece for preventing the binding of the binding band is provided.

[Operation and Embodiment] FIG. 1 is a perspective explanatory view showing a typical embodiment of the present invention. The pipe branch joint 2 is composed of a main pipe part 10 and a branch pipe line 20, and the main pipe part 10 is divided into two in the pipe axial direction similarly to the conventional example shown in FIG. Divided into 10B. A notch Wd ₂ as shown in FIG. ₂ is formed at the bottom of the groove of the trough-shaped piece 10B on the side of the branch pipe, and one end of the branch pipe 20 matches the notch Wd ₂ . Cutting part Wd ₁
The cutout portion Wd ₂ and the cut portion Wd ₁ are closely contacted and welded to each other along the welding line Wd (see FIG. 1) from the inside of the pipe to form the gutter-shaped piece 10A and the branch pipe portion 20. Be integrated. The cutout portion Wd ₂ and the cutout portion Wd ₁ may be formed in other shapes as long as they are in close contact with each other. Further, the above welding is not limited to that performed from the inside of the pipe, but welding is performed from the outside of the pipe, or welding is performed from the inside of the pipe and the outside is shown in FIG. 3 (plan view). As shown in the present invention, the FRP is attached by the hand layup method to form the reinforcing scale F.

The first feature of the present invention is that a guide piece 11 is first attached to the outer peripheral wall of either one of the gutter-shaped pieces 10A and 10B.
For example, as shown in FIGS. 1, 3, and 4, a gutter-shaped guide piece 11 having an inner diameter equal to the outer diameter of the trough-shaped piece 10B is provided at a substantially central portion in the longitudinal direction of the outer-circumferential wall of the trough-shaped piece 10B. Adhesively fix. As shown in FIG. 1, the guide piece 11 preferably has a unitary shape integrated in the circumferential direction and the axial length direction. However, as shown in FIG. 2, the guide piece 11 is divided in the axial length direction, or Alternatively, it may be divided in the circumferential direction, the point is that it is formed so as to project from the gutter opening surface of the gutter-shaped pieces 10A and 10B, and guides the outer peripheral surface of the other gutter-shaped piece on the joint end surface side, Any shape may be used as long as the joint end surfaces of the shaped pieces 10A and 10B are accurately brought into close contact with each other and the trough shaped pieces 10A and 10B are locked so as not to shift in the direction intersecting the pipe axis. Further, the guide pieces 11 may be attached to the outer peripheral surface of either of the gutter-shaped pieces 10A and 10B, and are provided alternately so as not to overlap both of the gutter-shaped pieces 10A and 10B. Is also good. Therefore, the joining action becomes reliable, and the reliable joining can be performed when the adhesive is applied.

Next, the second feature of the present invention is that the fixing piece is attached to the outer peripheral surface of the branch pipe portion 20.
There is 21. The fixing piece 21 is, for example, joined and fixed to the outer peripheral side inclined portion of the branch pipe portion 20 as shown in FIG. 3 and to the outer peripheral portion farthest from the main pipe portion 10, and as shown in FIG. A binding band 31 is arranged on the enlarged side portions of 21. The binding band 31 is not limited to a turnbuckle structure in which bolts 34 are interposed to tighten the tightening ends 32, 33 of the band 31 in the direction of approaching each other as shown in the illustrated example, but a steel wire, a wire rope, or a synthetic wire is used. A resin belt or the like that is fastened to be fastened, or a structure that is fastened by using a metal fitting or the like may be used. By providing such a fixing piece 21, the binding band 31 does not move by sliding on the inclined portion of the branch pipe portion 20, and the gutter-shaped pieces 10A and 10B can be securely tightened and fixed. .

On the other hand, both ends 12, 12 of the main pipe portion 10 must be connected to the existing pipe body 1. However, in the present invention, the joint structure in this portion is not limited, and as shown in FIG. A split collar joint 4 may be used, or fitting type collar joints 13 and 14 as shown in FIG. 5 may be used. That is, FIG. 5 is an explanatory view showing an example of a collar joint, which has an inner diameter substantially the same as the outer diameter of the tube body 1 and which has one notch 13A along the tube axis direction. 1
3 is preliminarily fitted and inserted into the outside of the pipe body 1, and the end portion 1 of the main pipe portion 10 is
2 and the tube end faces of the tube body 1 are butted against each other, an adhesive is applied to the outer circumference of the butted part, and the color tube 13
Is slid in the direction of arrow X (according to a so-called exchange method), and the color tube 13 is covered and adhered on the butted portion. Further, a C-shaped reinforcing color tube 14 having an adhesive applied to the inner surface 14a is covered from the outside so as to cover the notch 13A of the color tube 13 and is adhered to form a triple structure as shown in FIG. 6 (cross-sectional view). To form a joint.

In the illustrated example of the pipe branch joint 2, the branch pipe portion 20 and the main pipe portion are shown.
Although an example is shown in which 10 are arranged side by side in the horizontal direction, the branch pipe section 20 and the main pipe section 10 may be arranged in the vertical direction. Further, the example in which the enlarged diameter receiving portion 2A is formed at the tip of the branch conduit 20 is shown, but an opening portion may be formed. Further, when completely transferring the existing pipe line to the side of the branch pipe portion 20, the end portion 12 of the main pipe portion 10 is closed by using a pipe end closing joint.

[Effects of the Invention] Since the present invention is configured as described above, the gutter-shaped pieces divided into two parts can be accurately and closely joined to each other at their joint end faces, and further, both gutter-shaped pieces can be connected to the pipe shaft. It is also possible to prevent them from being displaced from each other in the cross direction.

Further, since the fixing piece is provided, the binding band does not lose the tightening support force by slipping, and the gutter-shaped piece can be securely tightened and held from the outside.

[Brief description of drawings]

1 is a perspective explanatory view showing a typical embodiment of the present invention, FIG. 2 is a perspective explanatory view showing another embodiment of the present invention, and FIG. 3 is a pipe branch joint shown in FIG. FIG. 4 is a plan view, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a perspective explanatory view showing a structural example of an end portion of a pipe branch joint, and FIG. 6 is shown in FIG. FIG. 7 is a cross-sectional explanatory view of a joint structure example, FIG. 7 is a plan explanatory view showing an example of a cable conduit, and FIG. 8 is an explanatory view showing a conventional conduit branch joint. DESCRIPTION OF SYMBOLS 1 ... Pipe, 2 ... Pipe branch joint 4 ... Joint, 10 ... Main pipe 11 ... Guide piece, 12 ... End 20 ... Branch pipe, 21 ... Fixing piece 31 ... Binding band, 34 ... Bolt

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tsuneo Denawa 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Mitsuru Takahashi 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corp. (72) Inventor Kei Sakuma 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp.

Claims (1)

[Scope of utility model registration request] 1. A branch pipe part is integrally joined in a Y-shape to the groove bottom of one of the gutter-shaped pieces obtained by dividing the pipe body along the pipe axis direction. One of the gutter-shaped pieces is provided with guide pieces attached to the outer sides of both walls so as to project from the gutter opening surface, and further, a fixing piece for preventing the binding band from being rubbed is provided on the outer peripheral surface of the branch pipe portion. A pipe branch joint characterized by the above.