JPH054637Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention mainly relates to a vent pipe branch joint for a two-layer pipe for connecting a vent branch pipe to a ventilation route in a drainage standpipe system of a high-rise building or the like.

[Conventional technology]

In the conventional two-pipe drainage standpipe system, a ventilation branch pipe is connected to the ventilation standpipe with a joint, and the ventilation standpipe is connected to the top of the drainage standpipe, and the top vent pipe is connected to the atmosphere. Although it is open, this ventilation standpipe is connected to the important points of the drainage standpipe with a joint ventilation pipe, and the loop ventilation pipes etc. from each of the above drainage side branch pipes are connected to the ventilation standpipe. are doing.

[Problem that the invention attempts to solve]

In such a conventional drainage standpipe system, a ventilation standpipe must be provided separately from the drainage standpipe, and key points of the drainage standpipe are connected to this ventilation standpipe with a connecting ventilation pipe. Furthermore, the drainage horizontal branch pipe must be connected to the ventilation standpipe by a loop ventilation pipe, and the connection structure thereof is extremely complicated. Therefore, the piping construction work has become extremely complicated, requiring a considerable amount of time and effort, and is not only costly, but also requires a large piping space, making it difficult to construct and install it in a narrow space. It was difficult. In addition, the piping construction work described above requires the preparation of pipe materials, fittings, machine tools, tools, etc. according to the drainage load, etc., and a large space for preparation. (workplace, movement of workspace depending on building progress, etc.)
was necessary. Furthermore, when making changes after piping work is completed or renewing existing piping, it is necessary to change the size of the piping, switch and adjust the piping direction and connection height, etc., as well as adjust the work schedule and arrange for workers. There was a problem in that they had to be replaced, resulting in wasted time and money. In addition, although there are various types of conventional drainage special piping joints available, most of them are integrated into the pipe material and connected to the pipe, and one joint is not suitable for pipes with different diameters. It is not possible to connect the piping, or to adjust the piping direction and position, and for this reason, its use is limited to hotels and apartment complexes, and in order to deal with piping changes, it is necessary to The problem was that it required unnecessary time and money. There is also a pipe joint described in Utility Model Publication No. 59-4226, in which at least one end of the joint body made of elastic rubber is closed with an end wall, and concentric grooves are carved on the outer surface of the end wall, and Although this pipe joint has a structure in which a tapered tongue protrudes diagonally toward the axis on the inner peripheral surface of the main body, in the case of this pipe joint, it fits into a branch pipe that is integrated with the drainage pipe of different diameters. Since the joint body is attached by tight band tightening, the joint body may sag due to the weight of the horizontal pipe connected to the branch pipe by the pipe joint, and there is a risk that the sealing performance of the pipe connection may be impaired. Therefore, a ring dedicated to preventing the joint body from falling is required. Furthermore, the above-mentioned pipe joint can only be applied to a horizontal pipe connection of a drainage pipe with different diameters integrally having branch pipes, and cannot be applied to a straight pipe section. In addition, if the pipe diameters of the branch pipe and the horizontal pipe connected to it via the pipe joint are significantly different,
A large gap is formed between them, and there is a risk that solid matter in the drainage may adhere and accumulate in this gap, causing pipe clogging. Furthermore, the pipe joint cannot be used if the inner diameter of the opening on the branch pipe connection side of the joint body and the outer diameter of the branch pipe are significantly different. This idea was made to solve the above problems, and allows various ventilation branch pipes with different pipe diameters to be connected easily and efficiently using a single joint.
Moreover, the piping direction and position can be arbitrarily set or adjusted, providing versatility, saving materials and time, and reducing costs. It is an object of the present invention to provide a vent pipe branch joint for a double-layer pipe with a simple structure, which can increase the strength of the connection part and provide reliable airtightness.

[Means to solve the problem]

The ventilation pipe branch joint for double-layer pipes of this invention has a plurality of pipes corresponding to the pipe diameters of the various ventilation branch pipes of different diameters on the end closing wall of the inner hole of the joint to be fitted into the branch pipe for connecting the branch pipes. A joint body with circular grooves according to diameter,
It has a split claw that can be inserted from the outside into the ventilation branch port of the ventilation pipe to which the ventilation branch pipe is connected, and that can be locked to the inner edge of the ventilation branch port, and the split claw side has a diameter that gradually becomes smaller. It is equipped with a joint sleeve formed in a split taper shape.

[Effect]

In the vent pipe branch joint for double-layer pipes of this invention, a circular cut groove with a diameter corresponding to the pipe diameter of the vent branch pipe to be connected to the vent branch port is selected among the circular cut grooves for each pipe diameter of the joint body. Insert the branch pipe into the opening, fit and engage the joint sleeve into the joint body, and insert the split claw side of the joint sleeve into the ventilation branch port on the outside. By inserting the branch pipe into the joint sleeve, the split taper part of the joint sleeve expands outward in the radial direction, and the split claws are inserted into the inner end periphery of the ventilation branch port. It is locked in the section.

【Example】

Hereinafter, embodiments of this invention will be described based on the drawings. Figure 1 shows a drainage standpipe system with a two-layer pipe structure in this embodiment, where 1 is an inner pipe that forms a drainage route, and 2 is an outer pipe (ventilation pipe) that forms a ventilation route between the inner pipe 1 and the inner pipe 1. ), and a ventilation branch pipe 3 is connected to an arbitrarily selected position of this outer pipe 2 via a branch pipe 4 with a ventilation pipe branch joint 5 for double-layer pipe. As shown in FIGS. 2 to 4, the vent pipe branch joint 5 for double-layer pipes is composed of a joint body 6, a joint sleeve 7, and a skirt 8. The joint body 6 is integrally formed in the shape of a cap nut, and includes an internal threaded portion 9a carved on the inner circumferential surface of the joint inner hole 9, and a distal end closing wall that closes the distal opening of the joint inner hole 9. 10, the distal end closing wall 10
A plurality of circular grooves 11 to 13 according to pipe diameter are provided on the outer end surface of the pipe. These pipe diameter-specific circular kerf grooves 11 to 13 are formed to have diameters corresponding to the pipe diameters of various ventilating branch pipes 3 of different diameters to be connected to the outer pipe 2 via the branch pipe 4. . In this embodiment, the circular kerf grooves 11 to 13 according to pipe diameter are formed concentrically. The joint sleeve 7 is screwed into the joint inner hole 9 and the outer peripheral surface of the branch pipe 4, and is inserted into the outer pipe 2.
A split claw 14 that is inserted into and connected to a ventilating branch port 2a drilled in the ventilating branch port 2a, can be inserted into the ventilating branch port 2a from the outside, and can be locked to the inner edge of the ventilating branch port 2a. have. The split claw 1 is attached to the joint sleeve 7.
A split taper portion 15 whose diameter gradually becomes smaller on the 4th side is integrally formed. Here, the split claw 14 and the split taper portion 15
is formed by a split groove 7a cut into one end side of the joint sleeve 7, thereby making the joint sleeve 7 expandable and deformable radially outward. In such a joint sleeve 7, the split taper portion 1
An outer flange 16 is integrally formed on the outer circumferential surface of the large-diameter side base of 5, and an outer threaded portion 16a for screwing into the inner threaded portion 9a of the joint body 6 is provided on the outer circumferential surface of this outer flange 16.
is engraved. Further, the inner circumferential surface of the joint sleeve 7 is provided with an inner threaded portion 7b for screwing into the outer threaded portion 4a of the branch pipe 4. For example, as shown in FIGS. 6A to 6C, such a joint sleeve 7 is provided in a plurality of sizes, each having an outer diameter of the cylindrical portion corresponding to each pipe diameter of the ventilation branch pipes 3 having various different diameters. A variety of items are available. On the other hand, the skirt 8 includes an annular portion 8a formed to have approximately the same diameter as the joint body 6 and fitted into the split taper portion 15 of the joint sleeve 7, and an annular portion 8a that is fitted into the split taper portion 15 of the joint sleeve 7
It consists of a curved saddle portion 8b that is integrally formed at one end of the outer tube a, projects radially outward, and is brought into close contact with the outer circumferential surface of the outer tube 2. Next, the outer pipe 2 is connected to the vent pipe branch joint 5 for double-layer pipes.
A case where the ventilation branch pipe 3 is connected to an arbitrary location will be explained. First, the ventilation branch pipe 3 to be connected to the outer pipe 2
A ventilating branch port 2a having a diameter corresponding to the pipe diameter is opened using an electric drill or the like, and a branch pipe 4 having a pipe diameter corresponding to the opening diameter of the ventilating branch port 2a is selected. Further, from among the joint sleeves 7 classified by size shown in FIGS. 6A to 6C, the joint sleeve 7 shown in FIG. 6A, for example, having a diameter corresponding to the pipe diameter of the ventilation branch pipe 3 is selected. Along with the selection, a circular kerf 11 with a diameter corresponding to the pipe diameter of the joint sleeve 7 shown in FIG.
Select and drill a hole in advance. Then, the external threaded portion 16a of the outer flange 16 of the joint sleeve 7 is screwed into the internal threaded portion 7b of the joint body 6, and the split taper portion 1 of the joint sleeve 7 is screwed into the internal threaded portion 7b of the joint body 6.
5. Loosely fit the skirt 8 into the hole. Next, the split tapered portion 15 of the joint sleeve 7
is inserted into the ventilation branch port 2a of the outer tube 2 from the outside. After the insertion, when the externally threaded portion 4a of the branch pipe 4 is screwed into the internally threaded portion 7b of the joint sleeve 7, the split taper portion 15 of the joint sleeve 7 expands outward in the radial direction. As a result, the split claws 14 of the joint sleeve 7 are locked to the inner peripheral edge of the ventilation branch port 2a, and the joint main body 6, joint sleeve 7, and skirt 8 are attached to the outer tube 2 in an airtight state. Fixed. In this state, the ventilation branch pipe 3 is connected to the branch pipe 4 via an NC joint. In addition, when the joint sleeve 7 shown in FIG. 6B is selected according to the pipe diameter of the ventilation branch pipe 3, the joint body 6
A circular kerf 12 with a diameter corresponding to the pipe diameter of the coupling sleeve 7 is selected and drilled from among the circular kerfs 11 to 13 according to the pipe diameter of FIG.
If this is selected, the circular cut groove 13 is selected and drilled, and the venting branch joint 5 is installed and set using the opening as shown in FIGS. 3 and 4 in the above manner. Then, the ventilation branch pipe 3 is connected and piped. Other embodiments are shown in FIGS. 8 and 9. In this embodiment, the skirt 8 is in the form of an annular bolt and has an outer flange 8b that abuts the surface of the outer tube. It has a structure in which the threaded part is screwed. In addition, in the joint sleeve 7 of this embodiment, the outer flange 16 is omitted, and the outer circumferential surface of the split taper portion 15 of the joint sleeve 7 is pressed against the inner circumferential surface of the skirt 8, so that the joint sleeve 7 is moved by frictional force. It is configured to be locked to the skirt 8 and the joint body 6. In this case as well, the branch pipe 4 is attached to the outer pipe in the same manner as in the previous embodiment. It goes without saying that the vent pipe branching joint 5 for two-layer pipes can also be applied to conventional two-pipe drainage systems.

[Effect of the idea]

As described above, according to this invention, various ventilation branch pipes with different pipe diameters can be connected easily and efficiently using one joint, and the piping direction and position can be set or adjusted as desired. This type of ventilation branch joint provides versatility, saves materials and time, reduces costs, greatly reduces piping work, and can adequately handle piping changes. Moreover, in particular, the ventilation branch pipe does not fall down due to its own weight, and the strength of the connection portion of the ventilation branch pipe can be increased, and reliable airtightness can be obtained. Therefore, there is almost no wasted work or incidental work, and workability is improved, work efficiency is good, and it is economical.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a drainage standpipe system according to an embodiment of this invention, Figs.
The figure is a perspective view of the joint body, Figures 6A to C are perspective views showing different sizes of joint sleeves, Figure 7 is a perspective view of the skirt, and Figure 8 is a perspective view of the joint sleeve according to another embodiment. FIG. 9 is a cross-sectional view showing a state in which the ventilating branch pipe is connected, and FIG. 9 is a perspective view of the joint sleeve of FIG. 8. In the figure, 2 is a ventilation pipe, 2a is a branch port for ventilation, 3 is a branch pipe for ventilation, 4 is a branch pipe, 5 is a branch joint for ventilation, 6 is a joint body, 7 is a joint sleeve, 9 is a joint inner hole, 10 is a tip closing wall, 11 to 13 are circular cut grooves according to tube diameter, 14 is a split claw, and 15 is a split taper portion.

Claims (1)

[Claims for Utility Model Registration] (1) In a two-layer pipe having a ventilation pipe 2 on the outside of the inner pipe 1, a branch pipe 4 for connecting a branch pipe is connected to the ventilation branch port 2a of the ventilation pipe 2. In the vent pipe branch joint for a double-layer pipe that connects vent pipes 3 of various diameters, a split claw 14 that can be inserted into the vent branch port 2a from the outside and can be locked to the vent branch port 2a is provided. The joint sleeve 7 is formed in a split tapered shape with a diameter gradually decreasing on the split claw 14 side, and the joint sleeve 7 and the ventilation branch port 2a attached to the ventilation branch port 2a are covered from the outside. It has a closing wall 10 that abuts the ventilation pipe 2 directly or via a skirt 8 and faces the end of the joint sleeve 7 that is far from the ventilation branch port 2a. , a joint inner hole 19 having a diameter corresponding to the required diameter of the branch pipe 4 can be bored in the closing wall 10 when the branch pipe 4 is installed into the joint sleeve 7. The joint sleeve 7 is inserted through the joint body 6 and the joint inner hole 19 of the joint body 6.
The branch pipe 4 is inserted into the joint sleeve 7, and the outer surface of the joint sleeve 7 is engaged with the inner surface of the joint body 6 directly or through the skirt 8. A locking means is provided for locking the branch pipe 4 to the ventilation pipe 2, and when the branch pipe 4 is attached to the ventilation pipe 2, the split claw 14 is inserted into the joint sleeve 7 of the desired inner diameter covered with the joint main body 6 in advance. This is inserted into the ventilation pipe 2 through the ventilation branch port 2a, and then a joint inner hole 9 corresponding to the required outer diameter of the branch pipe 4 is bored in the closing wall 10 of the joint main body 6. Then, by screwing the branch pipe 4 through the joint inner hole 9 to a predetermined position inside the joint sleeve 7 and locking it therein, the split claw 14 is expanded and deformed and is locked in the ventilation branch port 2a. The split claw 14
and the joint body 6 cooperate with each other to sandwich the ventilation pipe 2, so that the ventilation branch pipe 3 is connected to the branch pipe 4 which is fixed at a predetermined position with respect to the ventilation pipe 2. A ventilation pipe branch joint for double-layer pipes featuring: (2) The inner peripheral surface of the joint sleeve 7 and the branch pipe 4
The vent pipe branch joint for a two-layer pipe according to claim 1, wherein corresponding threaded portions 7b and 4b are formed on the outer circumferential surface of the vent pipe branch joint for a double-layer pipe as claimed in claim 1. (3) An outer flange 16 is integrally formed on the outer circumferential surface of the large-diameter proximal end of the split taper portion of the joint sleeve 7, and an outer threaded portion 16a carved on the outer circumferential surface of the outer flange 16 Inner threaded part 9 of joint body 6
The vent pipe branch joint for a two-layer pipe according to claim 1 or 2 of the utility model registration claim, characterized in that it is screwed into a. (4) Any one of claims 1 to 3 of the claims registered as a utility model, characterized in that the joint main body 6 has an airtight connection structure in which the joint body 6 is tightly attached to the outer circumferential surface of the ventilation pipe 2 via a skirt 8. 2. The vent pipe branch joint for double-layered pipes according to item 1. (5) The above-mentioned joint sleeve 7 can be replaced depending on the pipe diameter and material of the ventilation pipe 2, and the ventilation branch pipe 3 can be branched using the same pipe material. The vent pipe branch joint for a double-layer pipe according to any one of Items 1 to 4. (6) On the surface of the closing wall 10 of the joint body 6, a plurality of circular cut grooves 11 to 13 corresponding to different pipe diameters corresponding to the pipe diameters of the branch pipes 4 of various diameters are formed concentrically. A vent pipe branch joint for a double-layer pipe according to any one of claims 1 to 5 of the utility model registration claim, characterized in that: (7) The ventilation pipe 2 consists of an outer pipe that forms a ventilation route with an inner pipe 1 that forms a drainage route for a drainage standpipe system using two-layer pipes, and is provided with holes in arbitrarily selected locations on the outer pipe. 2. The vent pipe branch joint for a double-layer pipe according to claim 1, wherein a vent branch pipe 3 is connected to the vent path through a vent branch port 2a.