JPS6044550B2 - Bifurcation saddle band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a branch pipe connection when branching water from a main water pipe or a water distribution pipe, etc., in which the main pipe is attached to a flexible pipe made of resin such as a polyethylene pipe. It concerns the saddle band.

Normally, when dividing flow from a main pipe, etc., a saddle band is used to connect the branch pipe to the main pipe side, but if the main pipe is a strong pipe that does not easily deform, such as cast iron, as in the past, a saddle band that is simply split in two is used. It is easy to connect a branch pipe by tightening it to the circumferential surface of the pipe, but if the main pipe is flexible such as a polyethylene pipe, it may be crushed from above and below when a conventional saddle band is tightened. It deformed and began to protrude into the gap between both saddle bands, and the protruding portion cracked and leaked water, resulting in the drawback that the waterproof function of the branching portion could not be maintained sufficiently.

The present invention aims to eliminate the drawbacks of the above-mentioned conventional examples and to provide a new saddle band that is easy to handle and operate.

Next, the present invention will be described with reference to an illustrated embodiment.

1 and 2 are an upper saddle and a lower saddle, respectively, and a screw hole 3 is provided at the upper center of the upper saddle 1 to which a branch valve (not shown) can be attached. A sealing material 4 is installed between the screw hole 3 and the screw hole 3 so as to keep the area around the lower part of the screw hole 3 watertight.

On the other hand, on the inner surface of the lower saddle 2, arc-shaped auxiliary yokes 5 and 6 made of plate materials are arranged on the left and right sides, and as shown in FIGS. It is installed so that it can be opened and closed.

In other words, the auxiliary yokes 5 and 6 each use the rivet 7 as a fulcrum, and as shown by the imaginary lines in FIG. The images are enlarged into virtual images 5a, 6a). At this time, the upper edges 5' and 6' of the yoke are expanded beyond the inner diameter of the saddle to allow the fitting of a main pipe, which will be described later. Note that reference numeral 8 indicates an insertion hole for a tightening bolt 9. Reference numerals 5'' and 6'' designate fulcrum pivot brackets that project from the front and rear edges of the auxiliary yokes 5 and 6 and are bent outward. The branching saddle band of the present invention has the above-described configuration, and when used, as shown in FIG. The upper edges 5', 6' of the auxiliary yokes 5, 6 are pushed outward by the outer peripheral surface of the main pipe 10, and open outward about the fulcrum of the rivet 7, so that the main pipe 10 fits into the lower saddle 2. Moreover, since the auxiliary yokes 5 and 6 can be opened and closed around the fulcrum,
There is no deformation of the arc surface of the auxiliary yokes 5, 6 in the above work either. In addition, since the auxiliary yokes 5 and 6 are integrally connected to the saddle side by the rivet 7 that forms a fulcrum, there is no possibility that the auxiliary yokes 5 and 6 will move or fall during the installation work to the main pipe 10. . When the lower saddle 2 is fitted into the main pipe 10 in this way and then the upper saddle 1 is fitted into the main pipe 10 facing each other, the upper edges 5'' and 6'' of the yokes 5 and 6 come into contact with the inside of the upper saddle 1, and this In this state, as shown in FIG. 4, by tightening the upper saddle 1 and lower saddle 2 with bolts 9, both saddles 1 and 2 are attached so as to sandwich the main pipe 10.

Even if these two saddles are firmly tightened to stabilize the installation state, the main pipe 10 will not be crushed and deformed, or will not protrude into the flange gap between the two saddles, and will maintain its substantially circular state. . Therefore, both upper and lower saddles 1
, 2, when tightening, a gap remains between the flanges into which the bolts 9 are inserted, but the auxiliary yoke 5,
6 closes the gap and protects the flexible main pipe 10 from deforming or protruding.

As explained above, in the branching saddle band according to the present invention, the auxiliary yokes are attached to the inside of the lower saddle so as to be openable and closable, and the upper edge of each auxiliary yoke extends to a position where it abuts the inside of the upper saddle. Since it is formed by
The gap between the two saddles will be closed by the auxiliary yoke, and even if the main pipe held between the upper and lower saddles is a flexible tube made of resin, it will be deformed due to tightening and the gap between the two saddles will be closed. It does not protrude and crack, and has the excellent effect of preventing water leakage accidents from branching parts.
Furthermore, since it does not deform when tightened, it has the excellent effect of increasing the tightening pressure and stabilizing the attached state. Furthermore, since the auxiliary yoke can be opened and closed with respect to the lower saddle, when installing the lower saddle, it can be easily fitted by simply pressing the upper edge of the auxiliary yoke against the outer peripheral surface of the main pipe. It also has the excellent effect of being extremely easy to clean.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a front view of a branching saddle band partially shown in cross section, Fig. 2 is a plan view of the lower saddle, and Fig. 3 is a diagram showing the lower saddle relative to the main pipe. FIG. 4 is a schematic diagram for explaining the installation situation. FIG. 4 is a front view showing a completed installation state of both the upper and lower saddles to the main pipe. 1... Upper saddle, 2... Lower saddle, 3... Screw hole, 4... Seal material, 5,
6... Auxiliary yoke, 5'', 6Z... Upper edge of yoke, 5'', 6''... Bracket, 7...
Rivet (fulcrum), 8...Insertion hole, 9...
...Bolt, 10...Main.

Claims (1)

[Claims] 1. In a branching saddle band that is attached to a main pipe by tightening bolts between an upper saddle provided with a mounting screw for a branch valve and a lower saddle, a pair of auxiliary yokes are disposed facing each other inside the lower saddle. The branching saddle band is characterized in that each of the auxiliary yokes is attached so as to be openable and closable using the mounting position as a fulcrum, and the upper end edge of each auxiliary yoke is extended to a position where it abuts the inside of the upper saddle.