JPH07127383A - Hume pipe joint collar - Google Patents

Abstract

PURPOSE:To provide a simple-designed joint collar capable of preventing an offset between a collar and a form, and preventing grout leakage of a concrete material and reducing man-hours by forming a ring-shaped expansion unit at an outer end between a ring-shaped projected strip and a fixture unit and a socket unit and eliminate the need for anchor reinforcements and welding work required to fix the anchor reinforcements. CONSTITUTION:A base end of a collar 2 is used as a fixture unit 3 while the tip of the collar is used as a socket unit 5. A ring-shaped projected strip 6, which projects towards the center of the collar 2 in the shape of an arc and which is designed not to pull out, is formed on the fixture unit 3 of the collar 2. Ring-shaped expansion units D2 and D3, which are expanded into a larger-size than the outside diameter D1 of the collar 5 and comes into contact with an inner side unit of the socket unit 5 of a form 12 which mounts the collar 2, are formed respectively on the fixture unit 3 of the collar 2 and the outer end of the socket 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint collar for a fume pipe, and when molding a fume pipe by centrifugal force, an integral joint collar for connecting another formed fume pipe to this molded fume pipe is integrated. Regarding what to mold.

[0002]

2. Description of the Related Art Conventionally, as a joint collar for a fume pipe of this kind, for example, a hollow cylindrical collar body having an outer diameter of a straight shape having the same diameter is provided. Is a fixed portion integrally formed with the outer peripheral portion of the pipe end portion in a fitted state at the time of molding one pipe end portion, and the other pipe end portion connected to the one pipe end portion at the tip end portion of the collar body. A socket part that fits into the spigot part formed on the outer surface of the socket part, and a chamfered part that expands outward is formed on the outer end part of the socket part. A structure is adopted in which the anchor bars are fixed by welding and the waterproof material for embedding is manually attached.

[0003]

In the above structure, since the outer diameter of the collar body is formed straight over the entire length, when the collar body is mounted on the mold, the outer diameter of the collar body is increased. Difference between the inner diameter of the mold and the inner diameter of the mold may cause a step between the collar body and the mold, which may cause leakage of concrete material from the step, and the outer end of the socket part. There is a problem that the groove processing for forming the chamfered portion, the plurality of anchor bars and the welding work for fixing the plurality of anchor bars are required, and the number of steps for attaching the water blocking material for embedding is required.

The present invention has been made in view of the above points, and when the collar body is mounted on the mold, the expanded diameter portion formed by expanding the fixing portion of the collar body is provided on the inner side of the mold. It firmly adheres, there is no step between the collar body and the mold, and it is possible to reliably prevent the leakage of concrete material. The annular projection and the collar body are fixed to the fixing portion of the collar body. It is possible to reduce the man-hours by simultaneously processing and molding the annular expanded portion with respect to the outer end portion of the portion and the socket portion, without the need for welding work for fixing the plurality of anchor bars and the plurality of anchor bars, It is an object of the present invention to provide a joint collar for a Hume pipe which has a simple structure and is highly economical.

[0005]

The joint collar for a Hume pipe of the present invention is a joint collar for connecting mutually opposing pipe ends, and is a hollow tubular collar body mounted on the inner side of a mold. And a base end portion of the collar body is a fixed portion integrally formed with the outer peripheral portion of the pipe end portion in a fitted state at the time of molding the one pipe end portion, and the tip end portion of the collar body is formed as described above. A socket portion that is fitted to a spigot portion formed on the other pipe end portion that is connected to one pipe end portion, and has a concave arc-shaped projection at the fixing portion of the collar body toward the center of the collar body. An annular protrusion for preventing slipping out is formed, and an annular expanded portion that comes into contact with the inner portion of the mold is formed at the outer end portions of the fixing portion and the socket portion.

[0006]

In the fume pipe joint collar of the present invention, when the collar body is mounted in one end of the form and the form is tightened during the production of the fume pipe, the expansion formed on the outer end of the fixing part of the form is performed. The outer diameter portion of the diameter portion is brought into pressure contact with and closely adhered to the inner surface of the mold. Then, in this state, when the concrete material was poured into the mold and centrifugally molded, the fixing portion of the collar body was fitted to the pipe end, and the annular projection formed in this fixing portion was embedded. The fume tube is manufactured in this state, and the socket portion of the collar body is projected to the outside of the tube end portion of the fume tube.

At this time, since the outer diameter portion of the expanded diameter portion of the fixing portion is pressed against and closely adhered to the inner surface of the mold, the collar body is integrated without forming a step between the collar body and the mold. Of the concrete material is prevented from occurring in the outer peripheral portion of the collar body. In addition, since the annular ridge of the fixing part of the collar body is embedded and fixed in the tube end of the fume tube, the collar body is prevented from coming out of the tube end without using a plurality of anchor streaks in this annular groove. To be done.

Therefore, a fume tube in which the fixing portion of the joint collar is securely fixed to the pipe end is manufactured.

When the other fume pipe is connected to the fume pipe having the joint collar at the pipe end, the pipe of the other fume pipe is inserted into the socket portion of the joint collar fixed to the pipe end of the one fume pipe. By fitting the spigot part molded at the end and sealing the spigot part and the socket part of the joint collar, the pipe end of one of the fume pipes is connected to the other fume pipe through the joint collar. The pipe ends are easily watertightly fitted and connected.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a joint collar, which is formed by a hollow cylindrical collar body 2 to be mounted on the inner surface of a mold which will be described later, and the base end portion of this collar body 2 is formed into a fume tube. At the same time, the fixing portion 3 is integrally formed in the outer peripheral portion of the pipe end portion in a fitted state, and the tip end portion of the collar body 2 is connected to the pipe end portion of the other fume pipe. Socket part 5 that fits into the molded spigot part
Is formed as.

Thus, the collar body 2 is formed by winding a flat plate mainly made of a stainless steel material in a pipe shape to form a hollow cylindrical shape, and both end edges of the winding end are face-to-face welded. Are integrally formed. In this case, the circularity and rigidity of the collar body 2 can be sufficiently ensured even if a material having a thickness of 1.5 mm is used. Further, since the collar body 2 is made of stainless steel, it can be neatly finished without the need for painting, and the painting process can be omitted.

Next, the fixing portion 3 of the collar body 2 is integrally formed with a retaining ring-shaped protrusion 6 projecting in a concave arc shape toward the center of the collar body 2, and this annular protrusion is formed. An annular groove 7 having a concave arc shape is formed on the outer side of 6.
Further, the outer end portions of the fixing portion 3 of the collar body 2 and the socket portion 5 have an outer diameter D of the inner end portions of the fixing portion 3 and the socket portion 5.
The ring-shaped expanded portions 8 and 9 having outer diameters D2 and D3, which gradually expand outward from 1 to a larger diameter and contact the inner portion of the mold described later, are formed.

The outer diameter D3 of the annular expanded portion 9 formed in the fixed portion 3 is larger than the inner diameter of the mold which will be described later. The openings at both ends of the collar body 2 are formed so as to be expanded from the inner diameter D4 of the inner ends of the fixing portion 3 and the socket portion 5 by the annular diameter expansion portions 8 and 9 at both ends. .

Therefore, the annular protrusion 6 having the annular groove 7 of the fixing portion 3 and the enlarged diameter portions 8 and 9 of the outer ends of the fixing portion 3 and the socket portion 5 are used to mount the collar body 2 on a groove processing machine. Simultaneously process and form with a groove processing machine. Further, the annular enlarged diameter portion 8 at the outer end portion of the socket portion 5 is expanded and formed to have a large diameter, so that it does not corrode unlike a chamfered one.

A water-expandable rubber ring is provided in an arc-shaped recess 10 formed on the inner peripheral portion of the annular projection 6 formed on the fixing portion 3 of the collar body 2 and on the side opposite to the socket portion 5 side. 11 is integrally fixed by means such as coating or pasting.

Next, 12 is a mold, which has an inner diameter 13 into which the collar body 2 is inserted and is formed in a substantially hollow cylindrical shape. At one end of the mold 12, a fume tube is formed. One of the tube ends 15 of 14 and one of the rotating castings 17 for forming a reduced diameter spigot portion 16 are mounted on the tube end 15. Also, the other rotating casting for molding the other tube end portion 18 of the fume tube 14 at the other end portion of the mold 12
19 is mounted, and the joint collar 1 is held by the other rotary casting 19.

The inner diameter 13 of the mold 12 is formed to have a diameter substantially equal to or slightly smaller than the outer diameter D3 of the expanded diameter portion 9 formed in the fixing portion 3 of the collar body 2, that is, the mold 12 Inner diameter 13
On the other hand, the outer diameter D3 of the enlarged diameter portion 9 is formed to be substantially equal or slightly larger. The mold 12 may be a split mold formed by splitting the mold in two, and may be a seamless mold.

The rotary castings 17 and 19 mounted on both ends of the mold 12 are rotated by drive rollers 20 which are simultaneously driven to rotate at the same speed.

Next, the operation of the above embodiment will be described.

When manufacturing the fume tube 14, a holding portion for the other rotating casting 19 mounted on the other end of the form 12
The socket portion 5 of the collar body 2 arranged inside the mold 12 is deeply inserted into the groove 21, and the outer end of the expanded diameter portion 8 of the socket 5 is aligned with the outer end of the mold 12. . Then, when the formwork 12 is tightened by the rotating castings 17 and 19 at both ends, the outer diameter D1 of the collar body 2 formed at the outer end portion of the fixing portion 3 and the outer end portion of the socket portion 5 of the collar body 2. The outer diameter portions D2 and D3 of the diameter-enlarged portions 8 and 9 which are expanded to a larger diameter are pressed against and brought into close contact with the inner surface of the mold 12.

Next, in the above state, the driving rollers 20 rotationally drive the rotating castings 17 and 19 at both ends of the mold 12 at the same speed to move the mold 12 in the circumferential direction at a predetermined rotation speed. While rotating, the concrete material is poured into the mold 12 and centrifugally molded, and the concrete material is compacted in the centrifugal direction so that the concrete material has a predetermined hardness, and thus the mold has a predetermined hardness.
Stop rotation of 12.

At this time, the outer diameter portion D3 of the expanded diameter portion 9 formed at the outer end portion of the fixing portion 3 of the collar body 2 is pressed against and brought into close contact with the inner surface of the inner portion of the mold body 12 inside the formwork 12. The concrete material is poured into and centrifugally molded. At this time, the fixed portion 3 of the collar body 2 and the outer diameter portion D3 of the expanded diameter portion 9 of the fixed portion 3 are strongly pressed against the inner surface of the mold 12 by the concrete material. As a result, the fixing portion 3 of the collar body 2 is integrally fixed without forming a step between the outer diameter portion D3 of the expanded diameter portion 9 of the fixing portion 3 and the form 12. Thus, it is possible to prevent the concrete material from leaking to the outer peripheral portion of the collar body 2 between the outer diameter portion D3 of the enlarged diameter portion 9 and the mold 12.

Further, the annular projection 6 formed integrally with the fixing portion 3 of the collar body 2 and the arcuate recess 10 of the annular projection 6 are formed.
The water-expandable rubber ring 11 fixedly attached to is fixedly embedded in a concrete material having a predetermined hardness so as not to come out in the axial direction.

Next, after the rotation of the mold 12 is stopped, the concrete material molded into the shape of the fume tube 14 is aged for a predetermined time, and when the fume tube 14 is hardened, the both ends of the mold 12 are cured. By removing the castings for rotation 17 and 19 from the mold 12 and removing the mold 12 from the fume pipe 14, the spigot part having a reduced diameter at one pipe end 15 is formed.
16 is molded, and the collar body 2 is attached to the other pipe end portion 18.
The fume tube 14 in which the fixing portions 3 of FIG. 1 are integrally fixed is manufactured, and the socket portion 5 of the collar body 2 is projected to the outside of the other tube end portion 18 of the fume tube 14.

Therefore, the fume tube 14 in which the joint collar 1 is securely molded and fixed to the other tube end portion 18 is obtained.

The joint collar 1 molded and fixed to the fume pipe 14 has a plurality of anchor streaks formed by an annular ridge 6 integrally formed with the fixing portion 3 and embedded and fixed in the other pipe end 18. It is reliably prevented from coming out from the other tube end portion 18 without using it.

The fixing portion 3 of the collar body 2 is a fume tube.
Since it is integrally fixed to the other pipe end portion 18 of 14 in the fitted state, the outer diameter portion D3 of the expanded diameter portion 9 of this fixed portion 3 and the pipe end portion 18
Although the connecting portion with and is connected in a watertight manner, if water leakage may occur from the connecting portion toward the annular protrusion 6 to the inner side of the fixing portion 3, the annular protrusion 6 The water-expandable rubber ring 11 fixed to the front arcuate recess 10 reliably prevents water leakage toward the outer end of the other pipe end 18.

Since the joint collar 1 is formed of a flat plate mainly made of a stainless steel material into a pipe shape, it is usually unnecessary to apply a coating treatment.

Next, when the other fume tube 14 formed separately from the one fume tube 14 having the joint collar 1 is connected, the other one of the fume tubes 14 is connected. One of the tube ends 15 of the other fume tube 14 is inserted into the socket 5 of the collar body 2 fixed to the tube end 18 of the other.
The spigot portion 16 formed in the above is fitted, and the cushion material 22 is interposed between the other tube end portion 18 of the one fume tube 14 and the one tube end portion 15 of the other fume tube 14, By interposing the seal member 23 between the outer peripheral portion of the spigot portion 16 and the inner peripheral portion of the socket portion 5 of the collar body 2, the other pipe end portion of the one fume pipe 14 is interposed via the collar body 2. One tube end portion 15 of the other fume tube 14 is simply and watertightly fitted and connected to the tube 18.

In this case, at the outer end of the socket portion 5 of the collar body 2, there is formed an annular expanded portion 8 having an outer diameter D2 that gradually expands outward from the outer diameter D1. Therefore, the spigot portion formed on one pipe end portion 15 of the other fume pipe 14 by the guide action of the annular expanded portion 8
16 is easily fitted. A joint groove is formed in a joint groove 24 formed in an inner portion between the other pipe end portion 18 of the one Hume pipe 14 and the one pipe end portion 15 of the other Hume pipe 14. ing.

[0032]

According to the present invention, a retaining ring-shaped ridge protruding in a concave arc shape toward the center of the collar body is formed in the securing portion of the collar body, and the securing portion and the collar body are secured. The collar body is formed on the outer end of the socket part by forming a fixed part and an annular expanded part that expands to a diameter larger than the outer diameter of the socket part and abuts the inner part of the form frame for mounting the collar body. When mounted on the frame, the enlarged diameter portion expanded and formed on the fixing portion of the collar body surely adheres to the inner side of the mold, and there is no step between the collar body and the mold, It is possible to reliably prevent the leakage of concrete material,
The man-hours can be reduced by simultaneously processing and molding the annular protrusion on the fixing portion of the collar body and the annular expanded portion on the outer end portion of the fixing portion of the collar body and the socket, and the outer end portion of the socket portion can be reduced. There is no need to mechanically cut or chamfer pressure, and it does not require welding work to fix a plurality of anchor bars and a plurality of anchor bars. Therefore, the spigot portion can be easily fitted and connected, and the joint collar for the Hume pipe having a simple structure and a high economy can be provided.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a part of a joint collar for a fume pipe showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state of manufacturing a fume tube using the same joint collar.

FIG. 3 is an enlarged cross-sectional view of the joint collar embedded portion of the above.

FIG. 4 is a cross-sectional view showing a connection state between the fume tubes formed by the same method.

[Explanation of symbols]

 1 Joint color 2 Color body 3 Fixed part 5 Socket part 6 Annular ridge 8, 9 Expanding part 12 Form frame 15, 18 Pipe end part 16 Spigot part

Claims (1)

[Claims] 1. A joint collar for connecting mutually opposing pipe ends, which is formed of a hollow cylindrical collar body to be mounted on the inner side of a form, the base end portion of which is defined as The one pipe end is formed as a fixed portion integrally formed with the outer peripheral portion of the pipe end in a fitted state, and the other pipe end that connects the front end of the collar body to the one pipe end is formed. A socket portion that fits into a spigot portion formed in the above-mentioned portion, and the retaining portion of the collar body is formed with a retaining ring-shaped protrusion that protrudes in a concave arc shape toward the center direction of the collar body, and A joint collar for a fume pipe, characterized in that an annular enlarged diameter portion that abuts an inner portion of the form is formed at the outer end portions of the fixing portion and the socket portion, respectively.