JP4646790B2 - Connection branch - Google Patents

Description

   The present invention relates to a connecting branch pipe for connecting a branch pipe line such as a mounting pipe to a main pipe line such as a sewage main pipe.

In general, when connecting the installation pipe connected to the public sewage of each household to the sewage main pipe, when piping from the sewage main pipe to the upstream side, a saddle-type branch pipe is placed at a predetermined position of the sewage main pipe. Is installed to branch the sewage main pipe and connect the pipe to the branch pipe.
When attaching a branch pipe to the sewage main pipe, an opening is provided at a predetermined position of the sewage main pipe using a horuseau or the like, a saddle-type branch pipe is attached to the opening, and an adhesive or putty-like bonding agent is provided. Was used to fix the branch pipe to the sewage main pipe.
However, when an adhesive or putty-like bonding agent is used, it has been difficult to save labor in piping work and to ensure construction reliability.

Therefore, conventionally, a branch pipe that can mechanically fix the branch pipe to the sewage main pipe without using an adhesive or a putty-like bonding agent in order to save labor in piping work and ensure the reliability of the construction. Joints and branch connection pipe joints have been proposed (see Patent Document 1 and Patent Document 2).
In a conventional branch pipe joint, a plurality of first short pipes and second short pipes are connected via rubber rings and locked to the inner surface of the peripheral edge of the original pipe at the tip of the first short pipe. A saddle that is in contact with the outer surface of the peripheral edge of the attachment opening of the original pipe is attached to the outer peripheral part of the first short pipe, and the engagement part of the first short pipe and the mounting part of the saddle Attach a rubber ring between them, pull up the locking part with respect to the original pipe and saddle by rotating the second short pipe, and compress the rubber ring to the outer surface of the inner diameter part or the peripheral part of the attachment port Crimp.
Further, in the conventional branch connection pipe joint, the inner pipe attached to the branch hole of the pipe body is formed with a locking projection for preventing the drop into the branch hole, and larger than the diameter of the branch hole. While providing a close contact part with an elastic ring, a branch part that contacts the side edge of the insertion part is formed on the branch pipe connection pipe, and the close contact part is deformed to insert the inner pipe into the branch hole from the insertion part. After that, the threaded portion of the branch pipe connecting tube and the threaded portion of the inner tube are screwed together, the inner tube is pulled up, and the close contact portion of the inner tube is brought into close contact with the inner peripheral edge portion of the branch hole.

JP-A-4-194488 (page 2-4, FIG. 1) Japanese Utility Model Publication No. 7-55435 (page 2-3, FIG. 1)

However, in the above-described conventional configuration, when the second short tube is rotated, the locking portion is pulled up and the rubber ring is compressed and deformed to be crimped to the outer surface of the inner diameter portion or the peripheral portion of the attachment port. When an excessive rotational force or a screwing force is applied when the screw part and the screw part of the inner pipe are screwed together to pull up the inner pipe, and the close contact part of the inner pipe is brought into close contact with the inner peripheral edge part of the branch hole, There has been a problem that deformation of the locking portion or the close contact portion may occur, which may cause water leakage or improper fixing.
In the above conventional configuration, when the locking portion of the first short pipe or the flange portion of the branch pipe connecting pipe is forgotten to be locked, or when the locking portion or the locking portion of the hook portion is defectively locked. There was also a problem that water leakage might occur.
Furthermore, when the locking portion is pulled up by a rotation operation, a force is applied in the circumferential direction of the main pipeline, causing a deformation that flattenes in the circumferential direction of the main pipeline, and there is a problem that a smooth rotation operation is hindered. It was.

As a means for solving the above-described conventional problems, the present invention is a connection branch pipe 1 for connecting a branch pipe line to the main pipe line 2, and is a plurality of latches that are locked to the periphery of the opening 3 of the main pipe line 2. The locking member 6 provided with the locking claws 4 and 5, the saddle member 7 fitted on the locking member 6 and mounted on the main pipeline 2, and the saddle member 7 is inserted. And a connection member 9 provided with a connection port 8 to which a branch pipe is connected. One or both of the locking claws 4 and 5 are connected to the locking member 6 via a pivot pin 11. The locking claw 4 is pivotally attached to the pivot claw 4 so that the claw 4 can pass through the opening 3 of the main pipeline 2 by rotating the pivoted locking claw 4. By screwing the member 9 to the locking member 6, the locking claw 4 is prevented from rotating, so that the locking claw 4 cannot pass through the opening 3 of the main pipeline 2. There is provided a connecting branch pipes 1 that is ability, the diameter of the inner circumferential surface of the upper end of the opening of the saddle member 7, the opening of the saddle member 7 at a position corresponding to the circumferential direction of the main line A connecting member retaining latch 17 is formed along the circumferential direction of the upper end of the opening of the saddle member 7 at opposite positions in the direction, and the connecting member retaining latch 17 and the connecting member 9 are formed. The saddle member 7 when the connecting member 9 and the saddle member 7 are screwed together is brought into contact with the contact portion 30 formed at a position opposite to each other in the radial direction of the connecting member 9 on the outer peripheral surface of the saddle member 7. The connection branch pipe 1 that prevents the deformation of the perfect circle of the opening is provided.
When the connecting member 9 is screwed to the locking member 6, the upper portion of the pivoted locking claw 4 is sandwiched between the saddle member 7 and the connecting member 9, so that the locking claw It is desirable that the rotation of 4 is prevented.
In this case, a contact surface 25 is formed on the inner surface of the upper portion of the locking claw 4 that is pivotally attached, and a contact surface 26 is formed on the outer surface of the upper portion of the locking member 6 to which the locking claw 4 is attached. When the connecting member 9 is screwed to the locking member 6, the contact surface 25 of the locking claw 4 and the contact surface 26 of the locking member 6 are in contact with each other. It is desirable that the inward rotation of the upper portion of the locking claw 4 is prevented.
Further, it is desirable that the plurality of locking claws 4, 5 are provided along the axial direction of the main pipeline 2.
Furthermore, it is desirable that two of the locking claws 4 and 5 are provided as fixed claws formed integrally with the locking member 6 and the other as rotating claws rotated by a pivot pin. .

In the connection branch pipe 1 of the present invention, the locking claw 4 pivotally attached to the locking member 6 is rotated so that the locking claw 4 passes through the opening 3 of the main pipeline 2, and the opening of the main pipeline 2 is opened. After the locking claws 4 and 5 are locked to the periphery of the portion 3, the connecting member 9 is screwed to the locking member 6 to prevent the locking claws 4 from rotating. The claw 4 is prevented from passing through the opening 3 of the main pipeline 2.
Therefore, when the connection member 9 is screwed to the locking member 6, the locking claws 4 and 5 are securely locked to the peripheral edge of the opening 3. It is possible to prevent the occurrence and improve the certainty of the construction, and the connecting member retaining stopper 17 and the connecting member 9 on the outer peripheral surface of the connecting member 9 are opposed to each other in the radial direction. Since the formed contact portion 30 is brought into contact with the connecting member 9 and the saddle member 7, the opening of the saddle member 7 is prevented from being deformed in a perfect circle. In addition, since the construction work is simple and easy, it is possible to save labor in the piping work.

    Hereinafter, the present invention will be described in detail with reference to examples.

The present invention will be described with reference to an embodiment shown in FIGS.
In this embodiment, in the case of a connecting branch 1 for connecting a mounting pipe (not shown), which is a branch pipe connected to a public pipe (not shown) of each household, to a sewage main pipe 2, which is a main pipe. Is illustrated.

    The connecting branch pipe 1 includes a locking member 6 provided with two locking claws 4 and 5 that are locked to the periphery of the opening 3 of the sewage main pipe 2, and an outer fitting on the upper portion of the locking member 6. And a saddle member 7 mounted on the upper surface of the sewage main pipe 2, and a rubber ring receiving port 8 which is inserted into the saddle member 7 and connected to the attachment pipe is provided at the upper part. Member 9.

As shown in FIGS. 1 and 2, the two locking claws 4, 5 of the locking member 6 have a substantially L-shaped cross section, and the shape of the locking plate 10 that is extended substantially horizontally is sewage An arch shape is formed along the shape of the inner peripheral surface of the periphery of the opening 3 of the main pipe 2.
A pair of pivot pins 11 project from the upper side surface of one latch claw 4, and the one latch claw 4 can turn to the latch member 6 via the pivot pin 11. It is pivotally attached. On the other hand, the other locking claw 5 of the locking member 6 is provided integrally with the locking member 6. In this embodiment, the two locking claws 4 and 5 are provided along the axial direction of the sewage main pipe 2.
Further, a thread groove 12 is provided on the upper inner peripheral surface of the locking member 6 and the locking claws 4 and 5. Further, a locking step 13 is provided on the upper outer peripheral surface of the locking member 6 and the locking claws 4, 5, and the locking step 13 is locked to the periphery of the opening 3 of the sewage main pipe 2. Thus, the locking member 6 is prevented from falling into the sewage main pipe 2.

As shown in FIGS. 2, 3, and 4, a saddle plate 14 that is extended substantially horizontally is provided at the lower portion of the saddle member 7, and the shape of the saddle plate 14 is that of the sewage main pipe 2. It is an arch shape along the shape of the upper surface. A first packing 15 is fitted to the inner periphery of the lower portion of the saddle member 7.
Further, a contact step portion 16 is provided on the upper inner peripheral surface of the saddle member 7, and a retaining stopper for preventing the connection member 9 from coming off on the inner peripheral surface at the upper end of the saddle member 7. 17 (protruding claws 17a, 17b, 17c, 17d) project, and the projecting claws 17a and 17c provided in the circumferential direction of the main pipe line abut against a contact portion 30 provided in the connecting member 9 described later. Suppresses the compressive deformation (the force that tries to flatten) that occurs in the circumferential direction of the road.

As shown in FIG. 2, an insertion portion 18 is provided at the lower portion of the connection member 9, and a screw portion 19 is provided on the outer peripheral surface of the insertion portion 18. A contact portion 20 is provided above the insertion portion 18.
Further, an engagement protrusion 21 is provided on the outer periphery of the central portion of the connection member 9, and a second packing 22 is fitted to a portion below the engagement protrusion 21.
Further, a contact portion 30 that comes into contact with the retaining locking portion 17 (protruding claws 17a, 17c) is provided in the circumferential direction of the main pipe line at a portion above the engaging protrusion 21. The contact portion 30 may be annular in the circumferential direction, but is preferably raised protrusions 30a and 30c formed by bulging in the radial direction formed at positions facing each other with a gap therebetween.
An annular groove is formed in the saddle member at a position corresponding to the engagement protrusion 21, and the engagement protrusion 21 is fitted into the annular groove so as to be slidable.
Further, a rubber ring receiving port 8 is provided on the upper portion of the connecting member 9, and a rubber ring 23 is fitted on the inner peripheral surface of the rubber ring receiving port 8.

When piping from the sewage main pipe 2 to the upstream side is performed using the connection branch pipe 1, the connection branch pipe 1 assembled in advance at a manufacturing factory or the like is used as shown in FIG.
An opening 3 is provided at a predetermined position of the sewage main pipe 2 using a tool (not shown) such as a horusoe.
Then, the other locking claw 5 of the locking member 6 (a fixed claw formed integrally with the locking member 6) is locked to the inner peripheral surface of the periphery of the opening 3 of the sewage main pipe 2, and FIG. As shown by the arrows in FIG. 1, one of the locking claws 4 is rotated inward about the pivot pin 11 so that the one locking claw 4 can pass through the opening 3.

Next, as shown in FIG. 5, after passing one locking claw 4 through the opening 3 of the sewage main pipe 2, the one locking claw 4 is rotated outward about the pivot pin 11. Thus, the one locking claw 4 is locked to the inner peripheral surface of the peripheral edge of the opening 3.
Thereafter, as shown by an arrow in FIG. 5, the connecting member 9 is rotated to screw the screw portion 19 of the insertion portion 18 of the connecting member 9 into the screw groove 12 of the locking claws 4 and 5 (see FIG. 6). ). Then, since the upper part of one latching claw 4 is also pinched | interposed by the outer peripheral surface of the insertion part 18 of the connection member 9, and the inner peripheral surface of the saddle member 7, rotation of this one latching claw 4 is blocked | prevented. The one locking claw 4 cannot pass through the opening 3 of the sewage main pipe 2.

At this time, when the screw portion 19 of the insertion portion 18 of the connection member 9 is screwed into the screw groove 12 of the locking member 6 and the locking claws 4, 5, the locking claws 4, 5 of the locking member 6 are obtained. Is raised relative to the connection member 9 and the saddle member 7, and the opening 3 of the sewage main pipe 2 is formed by the upper surface of the locking plate 10 of the locking claws 4 and 5 and the lower surface of the saddle plate 14 of the saddle member 7. The connecting branch pipe 1 is securely fixed to the sewage main pipe 2.
In this case, since the first packing 15 is interposed between the inner peripheral lower surface of the saddle member 7 and the upper surface of the sewage main pipe 2, the saddle member 7 and the sewage main pipe 2 are The space between them is watertight. Further, since the second packing 22 is interposed between the inner peripheral surface of the saddle member 7 and the outer peripheral surface of the connecting member 9, the second packing 22 causes the saddle member 7 to be connected between the connecting member 9. Is in a watertight state (see FIGS. 6 and 7).

    After attaching the connection branch 1 to the predetermined position of the sewage main pipe 2 and branching the sewage main pipe 2 in this way, the connection pipe is inserted into the rubber ring receiving port 8 of the connection member 9 of the connection branch 1 and connected. Piping work is completed.

    In the above connecting branch 1, the two locking claws 4, 5 are securely locked to the periphery of the opening 3 of the sewage main pipe 2 by screwing the connecting member 9 to the locking member 6. It is possible to prevent the occurrence of poor locking and water leakage. Further, in the connection branch pipe 1, since the connection member 9 cannot be screwed to the locking member 6 unless one locking claw 4 is locked, the locking claws 4, 5 are locked. Forgetting can be prevented with certainty, and therefore the reliability of construction can be improved. In addition, since the construction work is simple and easy in the connection branch pipe 1 described above, it is possible to save labor in the piping work.

Further, when the locking member 6, the connecting member 9, and the saddle member 7 are assembled and rotated, the retaining locking portion 17 (protruding claws 17a, 17c) of the saddle member 7 and the connecting member are connected. 9 contact portions 30 (protruding protrusions 30a and 30c formed by bulging in the radial direction formed at positions facing each other at intervals in the circumferential direction) are brought into contact with each other in the circumferential direction of the main pipeline. Even if compressive deformation occurs due to the applied force, the circular (perfect circle) is maintained and the rotation operation is performed smoothly.
Since the retaining locking portions 17 (protruding claws 17a, 17b, 17c, 17d) of the saddle member 7 are engaged with and held by the engaging protrusions 21 of the connecting member 9, the connecting member in the assembled state. 9 and the saddle member 7 are not separated. Further, when the connecting member 9 and the locking member 6 are assembled, the screw portion 19 of the insertion portion 18 of the connecting member 9 is screwed and fixed to the screw groove 12 of the locking member 6. The connecting member 9 and the locking member 6 are not separated in the attached state.

    Further, since the one locking claw 4 is pivotally and integrally pivotally attached to the locking member 6 via the pivot pin 11, the one locking claw 4 can be smoothly rotated. Since one of the locking claws 4 does not fall during the work, the construction work can be performed smoothly and the workability of the construction is improved.

Still further, when the screw portion 19 of the insertion portion 18 of the connection member 9 is screwed into the screw groove 12 of the locking member 6, the upper portion of one locking claw 4 is connected to the outer peripheral surface of the insertion portion 18 of the connection member 9. By clamping with the inner peripheral surface of the saddle member 7, the rotation of the one locking claw 4 can be prevented and the deformation can be reduced, so the load applied to the pivot pin 11 can be reduced. There is almost no possibility that the pivot pin 11 will break.
In addition, even when the pivot pin 11 is broken, the connecting member 9 is screwed and fixed to the locking member 6, and one locking claw 4 is connected to the outer periphery of the saddle member 7. Since it is clamped by the surface and the inner peripheral surface of the connecting member 9, the engagement of the one locking claw 4 is not released, and the one locking claw 4 does not fall inward.

In addition, since the two locking claws 4 and 5 are provided along the axial direction of the sewage main pipe 2, the locking claws 4 and 5 are placed at the highest position on the periphery of the opening 3 of the sewage main pipe 2. It can be locked.
Further, since the two locking claws 4 and 5 are provided along the axial direction of the sewage main pipe 2, the connecting branch pipe 1 is mounted with being inclined with respect to the axis of the sewage main pipe 2. Even if it exists, the latching claws 4 and 5 are not located below the tube bottom of the attachment tube.

    The embodiments of the present invention have been described above by way of examples. However, the scope of the present invention is not limited to these embodiments, and can be changed or modified in accordance with the purpose within the scope of the claims. It is.

    For example, in the embodiment shown in FIGS. 1 to 7, the rubber ring receiving port 8 is described as being provided on the upper portion of the connecting member 9 as a connecting port to which the attachment pipe is connected. As shown in FIGS. 8 and 9, a swingable rubber ring receiving port 8 may be provided in the upper part of the connecting member 9 as a connecting port to which the attachment pipe is connected.

    Further, the rubber ring receiving port 8 has been described as being provided on the upper portion of the connecting member 9 as a connection port to which the mounting tube is connected, but the mounting tube is connected as shown in FIG. As a connecting port, a rubber flexible receiving port 8 may be provided on the upper part of the connecting member 9.

    Furthermore, an adhesive receiving port (not shown) may be provided in the upper part of the connecting member 9 as a connecting port to which the attachment pipe is connected, other than the above-described embodiment.

    Furthermore, as shown in FIG. 10, a handle 24 that serves as a clue when rotating the connection member 9 may be provided on the outer peripheral surface of the connection member 9. Further, instead of providing the handle 24, a protrusion (not shown) or a hole (not shown) that serves as a clue when the connecting member 9 is rotated may be provided.

    Moreover, in the said Example, although one latching claw 4 demonstrated as what was pivotally attached to the latching member 6 via the pivoting pin 11, both latches other than the said Example were demonstrated. The claws 4 and 5 may be pivotally attached to the locking member 6 via the pivot pin 11.

    Furthermore, in the above embodiment, it has been described that the connecting branch pipe 1 is used when connecting the attachment pipe, which is a branch pipe line, to the sewage main pipe 2, which is the main pipe line. The connecting branch pipe 1 may be used when connecting another branch pipe (not shown), which is a branch pipe, to the vertical pipe (not shown).

    INDUSTRIAL APPLICABILITY The present invention can be used industrially as a connection branch pipe that can improve the certainty of construction and can save labor in piping work.

It is a perspective view of the locking member of an Example. It is a decomposition | disassembly side sectional view of the connection branch pipe of an Example. It is a top view of the saddle member of an Example. It is explanatory side sectional drawing of the connection branch pipe (state which rotated the latching claw) of the Example. It is explanatory side sectional drawing of the connection branch pipe (state which latched the nail | claw) of the Example. It is a description sectional side view of the connection branch pipe of an Example. It is explanatory front sectional drawing of the connection branch pipe of an Example. It is explanatory side sectional drawing of the connection branch pipe of the modification of an Example. It is explanatory front sectional drawing of the connection branch pipe of the modification of an Example. It is explanatory side sectional drawing of the connection branch pipe of the modification of an Example.

1 Connecting branch 2 Main pipeline (sewage main)
DESCRIPTION OF SYMBOLS 3 Opening part 4 One latching claw 5 The other latching claw 6 Locking member 7 Saddle member 8 Connection port (rubber ring receiving port)
9 Connecting member 11 Pivoting pin

Claims (1)

A connecting branch for connecting a branch pipe to the main pipe,
A locking member provided with a plurality of locking claws locked to the periphery of the opening of the main pipeline; a saddle member fitted on the locking member and mounted on the main pipeline; and the saddle And a connection member provided with a connection port to which the branch pipe is connected while being inserted into the member,
One or both of the locking claws are pivotally attached to the locking member via a pivot pin, and the locking claws are pivoted by rotating the pivoted locking claws. Through the opening of the road,
On the inner peripheral surface of the upper end of the opening portion of the saddle member, the upper end of the opening portion of the saddle member is located at a position corresponding to the circumferential direction of the main pipeline and opposed to each other in the radial direction of the opening portion of the saddle member. Forming a connecting member retaining stopper along the circumferential direction of
And said connecting member retaining engagement portion, by causing contact and a contact portion formed at a position opposed in the radial direction of Oite the connecting member to the outer peripheral surface of the connecting member, the connecting member and the saddle member A connecting branch pipe that prevents a perfect circle from deforming the opening of the saddle member when screwing together .

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