JPH09324883A - Pipe connecting packing, its mounting method and mounting jig used for its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the displacement of a packing, by arranging around the end side of the packing after mounting, a flange which is extended on a peripheral side and brought into contact with the end surface of the receiving opening of the other pipe, and arranging to the flange, a reinforcing member by which the flange is prevented from being deformed. SOLUTION: A packing 1 employs rubber as a raw material and is formed into a cylindrical shape whose diameter of its mounting end side is gradually contracted, and two annular tongue pieces 1a are projected along the whole circumference of the inner surface of the packing 1. After mounting, a flange 2a is formed around the whole circumference of the end side, and a bent over part 2b is formed to the whole circumference from the periphery of the flange 2a. The packing 1 is mounted in the inner surface of a receiving opening 11a by a forceps like jig. Hereby, the packing 1 is mounted under a condition that the receiving opening 11a of a pipe 11 is elastically sandwiched, may not be pushed to the inner end part by the inserting movement of a pipe 12 when the pipe 12 is inserted in an inner circumferential side after mounting and connected to the pipe 11, and is retained certainly in the original mounting position. If a reinforcing member is attached along the flange 2a and the outer surface of the bent over part 2b, the receiving opening 11a can be strongly sandwiched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting packing used for connecting a lateral branch pipe to, for example, a drainage pipe joint, and a method for mounting the packing on a receptacle of the drainage pipe joint. , A mounting jig used in this mounting method.

[0002]

2. Description of the Related Art Heretofore, as this type of packing, a one-touch type packing has been known as disclosed in, for example, Japanese Utility Model Publication No. 55-5833. This one-touch packing has a substantially cylindrical shape, and is used in a connection mode in which one pipe is inserted into the inner peripheral side of the other pipe and connected. That is, for example, when the drainage vertical pipe 21 is inserted and connected to the connection port 22 of the drainage vertical pipe joint as shown in FIG. 11, the drainage vertical pipe 21 is inserted between the inner peripheral side and the outer peripheral side of the drainage vertical pipe 21. With this one-touch packing 20 interposed, both
The one-touch packing 20 allows the pipe to be connected to a reliable water-tight state by the one-touch packing 20, so that the pipe connection workability is better than that of the conventional mechanical joint. Could be greatly improved.

[0003]

However, the conventional one-touch packing 20 has the following problems. That is, in the conventional positioning of the one-touch packing 20, only the flange portion 20a integrally formed on the rear end side of the mounting is brought into contact with the receiving end surface of the connection port 22, and the flange portion 20a is similar to the packing body. Since it was made of relatively soft rubber, the packing 20 was previously attached to the inner peripheral surface of the connection port 22, and then the packing 20
At the stage of inserting the pipe 21 on the inner peripheral side, the flange portion 20a is deformed as the pipe 21 is inserted. For this reason, the worker must insert the tube 21 while preventing the packing 20 from being displaced (pushed in), which makes connecting the tube 21 very troublesome.

In particular, when the pipe connecting direction is horizontal, for example, when connecting a horizontal branch pipe to a vertical pipe joint, one pipe (the horizontal branch pipe) is usually initially inclined and the other pipe is connected to the vertical pipe joint. The pipe is connected to the pipe (connection port of the pipe joint), and then gradually returned to the horizontal position and inserted into the other pipe. In this case, the weight of one pipe acts on the other pipe in advance. The position of the packing attached to the inner surface of the is especially large.

On the contrary, when the pipe 21 is once connected and then the pipe 21 is to be pulled out from the connection port 22 for maintenance or the like, the packing 20 is also removed from the connection port 22 together. There was a problem that it took time to reconnect.

The present invention has been made in view of the above conventional problems, and a pipe connecting packing that can be firmly mounted so as not to be displaced from a predetermined position, a mounting jig for mounting the packing, and the mounting. It is an object of the present invention to provide a method for mounting a packing for pipe connection using a jig.

[0007]

Therefore, according to the first aspect of the present invention, the packing for connecting pipes is interposed between the two pipes when inserting and connecting one pipe to the inner peripheral side of the other pipe. A packing having a substantially cylindrical shape, which has a flange portion that extends to the outer peripheral side and abuts against the receiving end surface of the other pipe around the mounting rear end side, and the flange portion has the flange portion. Is provided with a reinforcing member for preventing deformation.

According to this packing, by the reinforcing member,
Since the deformation of the conventionally provided flange portion is suppressed, the position shift of the packing due to the inserting operation of one of the pipes is prevented, and therefore the pipe connecting work is simplified.

Further, since the displacement of the packing in which the deformation of the flange portion is suppressed is prevented, it is possible to obtain higher water tightness than the conventional one.

According to a second aspect of the present invention, a packing for connecting pipes is a packing having a substantially cylindrical shape, which is interposed between two pipes when one pipe is inserted into the inner peripheral side of the other pipe for connection. Around the rear end side of the mounting, there is a flange portion that projects to the outer peripheral side and abuts the receiving end surface of the other pipe, and the other pipe protruding to the mounting front end side on the outer periphery of the flange portion. It is characterized in that a folded-back portion capable of sandwiching the receiving end portion of is provided.

According to this packing, the other end is attached to the inner peripheral side of the pipe with the folded end sandwiching the receiving end of the other pipe. For this reason, at the stage of inserting one of the pipes into the inner peripheral side after mounting, the packing has the folded-back portion sandwiching the receiving end portion of the other pipe, so that the packing is stronger than the other pipe than the conventional one. Since the position is maintained, there is no displacement due to the inserting operation of one of the pipes, and therefore the connecting work of the pipes is simplified. Also, by preventing the packing from being displaced during pipe connection,
Similar to the above, it is possible to obtain higher water tightness than in the past.

A packing according to a third aspect is the packing according to the second aspect, which is the packing according to the second aspect, wherein the folded-back portion has a concave-convex member in a pulling-out direction with respect to an outer peripheral surface of the receiving opening of the other pipe. It is characterized in that a mating engaging portion is provided.

According to this packing, when one of the tubes is inserted, the positional deviation of the packing is prevented by the folded portion sandwiching the receiving end of the other tube as described above, and At the time of withdrawal, the engaging portion engages with the outer peripheral surface of the other tube in a concave-convex manner in the removal direction, thereby preventing the packing from being displaced relative to the other tube. In this way, the position shift of the packing is prevented both at the time of inserting the tube and at the time of withdrawing the tube, so that not only the tube connecting operation but also the tube extracting operation at the time of maintenance can be easily performed.

According to a fourth aspect of the present invention, there is provided a packing according to the second aspect, wherein the flange portion or the folded portion or both of them is a reinforcing member for preventing the flange portion or the folded portion or both of them from being deformed. It is characterized by installing.

According to this packing, deformation of the folded portion is prevented by the reinforcing member, so that the other tube of the folded portion is more firmly pinched between the receiving end portion of the pipe,
As a result, displacement of the packing with respect to the other tube can be prevented more reliably.

The packing according to claim 5 is the packing according to claim 1 or 4, wherein the reinforcing member is made of a non-combustible material and has an annular shape capable of covering the outer surfaces of the flange portion and the folded portion. It is characterized by having done.

According to this packing, the reinforcing member also functions as an incombustible annular cover, so that the positional deviation of the packing can be more reliably prevented as described above, and the deterioration of the packing over time can be suppressed. (Improvement of durability), and burning of the packing at the time of fire or the like can be prevented to prevent generation of harmful gas (improvement of incombustibility).

The packing according to claim 6 is the packing according to claim 1 or 4, characterized in that the reinforcing member can be retrofitted to the packing attached to the other pipe. .

According to this packing, the reinforcing member can be attached according to the actual installation condition at the construction site, so that the reinforcing function of the reinforcing member can be exhibited more reliably. As the means for retrofitting, in addition to the structure of simply fitting and fixing, it is possible to fix by means of adhesion, caulking, curling or the like, or an engaging portion described later.

The packing according to claim 7 is the packing according to claim 1 or 4, wherein the reinforcing member is preliminarily attached by insert molding.

According to this packing, since it is not necessary to perform the work of attaching the reinforcing member (for example, curling bending work) at the construction site, the product value of the packing and thus the pipe having the packing is increased and the pipe connecting work is simplified. Moreover, there is no need to worry about losing the reinforcing member, which facilitates component management.

The packing according to claim 8 is the packing according to claim 6 or 7, wherein the reinforcing member is provided with an engaging portion for preventing the packing from coming off.

According to this packing, the reinforcing member is more firmly attached to the packing. It is conceivable to provide a small-diameter engagement hole, an engagement recess, an engagement claw, or the like as the engagement portion. For example, in the case of the tip-on type according to claim 7, the molding material (rubber) of the packing is insert-molded with respect to these engaging portions, so that they are caught in the detaching direction with respect to the packing. Is firmly fixed so that it will not come off the packing. Even in the case of the retrofit type according to claim 6, the reinforcing member can be firmly attached by providing an engaging portion such as an engaging claw.

The packing according to claim 9 is the packing according to claim 1 or 2, characterized in that the flange portion is screwed to the receiving end surface of the other pipe.

According to this packing, it is possible to more reliably prevent the displacement of the packing when the pipe is connected and the falling of the packing when the pipe is removed.

A mounting jig according to a tenth aspect is a jig for mounting the packing according to the first or second aspect on the other pipe, and a shaft portion having the same outer diameter as one pipe, It is characterized in that it is provided with a collar portion protruding from the shaft portion.

According to this mounting jig, the shaft portion is inserted into the inner peripheral side of the packing, and the flange portion of the packing is brought into contact with the flange portion to set the packing to the mounting jig.
After setting in this way, the shaft portion of this mounting jig is inserted into the receiving opening of the other tube while the packing is set, and thereby the packing is pushed into the receiving opening of the other tube.

After the mounting jig is inserted until the flange portion of the packing comes into contact with the end face of the receiving opening, the mounting jig is pulled out while preventing the packing from coming off, and the mounting of the packing is completed. Since the shaft portion of the mounting jig has the same outer diameter as that of the one tube, the packing is properly mounted in the receiving port of the other tube without being deformed.

As described above, by using the mounting jig according to the tenth aspect, the cylindrical packing can be mounted quickly and properly along the inner peripheral surface of the receiving opening of the other tube. When the packing is not only the flange portion but also the folded portion (the packing according to claim 2), when the flange portion is brought into contact with the receiving end face, the folded portion is positioned on the outer peripheral side of the receiving opening. , Just push in the same way as above.

Further, since the shaft portion of the mounting jig has the same outer diameter as that of one of the pipes, by measuring the insertion resistance or the withdrawal resistance of the jig, a packing of this kind for one pipe and the other pipe ( It is possible to objectively inspect and manage the mounting force (sealing force) of the slip-on packing.

A mounting jig according to an eleventh aspect is a jig for mounting the packing according to the ninth aspect on the other pipe, and includes a shaft portion having the same outer diameter as that of the one pipe, and the shaft portion. It is characterized in that it is provided with a flange portion projecting from the guide portion, and the flange portion is provided with a guide pin corresponding to the hole for screwing the flange portion and the hole for screwing the reinforcing member.

This mounting jig is suitable for packing of the type in which the flange portion or the flange portion and the reinforcing member are screwed to the receiving port of the other pipe. The mounting procedure is performed by first inserting the shaft portion of the mounting jig into the inner peripheral side of the packing, and inserting the guide pin into the flange portion of this packing or the screwing hole provided in the flange portion and the reinforcing member. The flange is brought into contact with the flange, and the packing is set on the mounting jig. After setting in this way, in the receiving end of the other tube,
With the packing set, insert the shaft of this mounting jig, and push the packing into the receiving port of the other tube.

In the step of pushing in, the position of the mounting jig in the axial direction is adjusted so that the guide pin is inserted into the screw hole for screwing provided in the receiving end face of the other tube. At the final stage of pushing, insert the guide pin into the screw hole and bring the flange part of the packing into contact with the receiving end face, and then remove the mounting jig while preventing the packing from coming out Is completed.

As described above, according to the mounting jig of the eleventh aspect, the packing can be quickly and neatly mounted as in the mounting jig of the tenth aspect, and the screwing hole on the flange side and the receiving side Since the screw holes are mounted in alignment with the screw holes, the screwing work can be performed quickly.

The mounting jig according to claim 12 is the same as that according to claim 10.
Alternatively, the mounting jig according to the eleventh aspect is characterized in that the shaft portion is provided with a concave portion for allowing the retaining projection provided on the packing to escape inward in the radial direction.

According to this mounting jig, when the outer peripheral surface of the packing main body is provided with a retaining protrusion for the receiving port, the retaining protrusion reaches the retaining recess provided on the inner peripheral surface of the receiving port during the pushing step. Until then, the retaining protrusion can be released radially inward, so that the mounting jig and the packing can be pushed into the receiving opening with a light pushing force without receiving a large resistance.

A mounting method according to a thirteenth aspect is the tenth aspect.
Or a method of mounting the packing on the other tube by using the mounting jig according to 12, wherein a flange portion is brought into contact with a flange portion of the mounting jig to set the packing around the shaft portion, The shaft portion is inserted into the other pipe in the set state, the flange portion is brought into contact with the receiving end surface of the other pipe by the collar portion, and then the mounting jig is pulled out from the packing to seal the packing. Is attached to the other tube.

According to this mounting method, the method according to claim 1 or 2
It is possible to quickly and neatly mount the packing described or the packing provided with the retaining projection on the outer peripheral surface of the main body.

According to a fourteenth aspect of the present invention, the mounting method is the eleventh aspect.
Or a method of mounting the packing on the other tube by using the mounting jig according to 12, wherein a guide pin of the mounting jig is inserted into a hole for screwing a flange portion of the packing,
The flange is brought into contact with the flange, the packing is set around the shaft, the shaft is inserted into the other pipe in the set state, and the guide pin is inserted into the receiving end face of the other pipe. After the flange portion is brought into contact with the receiving end surface of the other pipe by the collar portion while being inserted into the screw hole for screwing the flange portion provided in the above, the mounting jig is pulled out from the packing to remove the packing. It is characterized in that it is attached to the other tube.

According to this mounting method, it is possible to quickly and cleanly mount the packing according to the ninth aspect or the packing having the retaining projection on the outer peripheral surface of the main body.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG. In FIG. 1, a packing 1 of the most basic first embodiment, a pipe 11 on which the packing 1 is mounted on an inner surface, and a pipe 12 inserted on an inner peripheral side of the packing 1 are respectively before mounting and before insertion. It is shown in the state of. The pipes 11 and 12 will not be described in detail because they do not need to be changed, but the pipe 11 is a lateral branch pipe connection port of the drainage vertical pipe joint 10 as shown in FIG. 3, and is connected to the other pipe on the connection receiving side. Applicable Similarly, as shown in FIG. 3, the pipe 12 is a horizontal branch pipe connected to the horizontal branch pipe connection port 11 of the drainage vertical pipe joint 10, and corresponds to one pipe on the connected side.
Needless to say, the tube 11 has a larger diameter than the tube 12. In FIG. 3, 15 is a toilet bowl, 16 is a wall surface, 17 is a concrete slab that divides the upper floor and the lower floor, and 18 is a drainage pipe on the downstream side.

As shown in FIG. 1, the packing 1 is made of rubber having appropriate elasticity and is integrally molded into a substantially cylindrical shape whose mounting tip side (the left end side in the drawing) is gradually reduced in diameter. Two annular tongue-shaped pieces 1a, 1a are formed over the entire circumference of the inner peripheral surface.

On the rear end side (the right end portion in the figure) of the packing 1 that is mounted, a flange portion 2a that projects to the outer peripheral side is formed over the entire circumference, and a folded-back portion 2b is mounted over the entire circumference from the outer circumference of the flange portion 2a. It is formed to project toward the tip side. The packing 1 thus formed is attached along the inner surface of the receiving port 11a by using, for example, a forceps-shaped jig. In the mounted state of the packing 1, the flange portion 2a is brought into contact with the end surface of the receiving port 11a. Also,
The folded-back portion 2b has a width slightly smaller than the wall thickness of the pipe 11 in consideration of the elasticity so that the elasticity of the folded-back portion 2b presses the outer peripheral surface of the receiving port 11a. It is set.

Therefore, when the pipe 11 is attached,
The flange portion 2a is brought into contact with the receiving end surface, and the folded portion 2b is elastically pressed against the outer peripheral surface of the receiving opening 11a over the entire circumference thereof, whereby the packing 1 receives the receiving opening 11 of the pipe 11.
It is mounted in a state where a is elastically sandwiched. From this, when the pipe 12 is inserted into the inner peripheral side of the packing 1 and connected to the pipe 11 after the packing 1 is mounted, the packing 1 is moved further toward the inner part (left side in the drawing) as the pipe 12 is inserted. The packing 1 is securely held in the initial mounting position without being pushed in, and as a result, the operator can insert the pipe 12 without worrying about the positional deviation of the packing 1, so that the piping work can be performed easily. Will be able to.

Further, since the packing 1 is held at a predetermined mounting position without being displaced by the elastic pinching action of the folded portion 2b, for example, for maintenance, the pipe 12
Even when the pipe 1 is pulled out from the pipe 11, the packing 1 does not come off from the pipe 11 when the pipe 12 is pulled out. For this reason, it is possible to save the labor of installing the packing when the pipe 12 is connected again, and as a result, the maintainability is improved.

Next, FIG. 2 shows an example in which the folded-back portion 2b is provided with engaging portions 2c-2e for the outer peripheral surface of the pipe 11. In the following description, the same reference numerals are used for points that do not need to be changed, and the description thereof will be omitted.
The engaging portion 2c shown in FIG. 2 (A) is formed by forming a ridge having a square cross section over the entire inner surface of the folded portion 2b. The outer peripheral surface of the receiving port 11a corresponds to the engaging portion 2c. An engaging groove 11b having a rectangular cross section is formed over the entire circumference.

By mounting the engaging portion 2c fitted in the engaging groove 11b, the packing 1 is displaced in the pushing direction (mounting direction) and the disengaging direction in combination with the elastic pinching action of the folding back portion 2b. Is more strongly prevented. When the outer peripheral surface of the pipe 11 is subjected to a surface treatment such as painting, it is desirable to perform a treatment such as masking so that the engagement groove 11b is not covered with the paint.

FIG. 2B shows another example of the engaging portion 2d. The engagement portion 2d is formed in a saw blade shape that is inclined in the detaching direction of the packing 1 (rightward in the drawing).
According to the engaging portions 2d to 2d, the positional deviation in the disengagement direction due to an increase in the catching resistance between the outer peripheral surface of the pipe 11 and the elastic pressing action of the folded portion 2b is more reliably prevented, and thus Positional displacement of the packing 1 in the pushing direction and the removing direction is prevented. In this case, tube 1
Although the engaging means corresponding to the engaging groove 11b is not particularly provided on the first side, a plurality of rows of linear engaging grooves are formed in the circumferential direction so that the engaging portions 2d to 2d are not caught. May be further increased.

FIG. 2C illustrates the case where the engaging portions 2e to 2e having a semicircular cross section are formed in place of the engaging portions 2d to 2d. With these engaging portions 2e to 2e, the function of holding the position of the packing 1 by the folded-back portion 2b is further ensured. It should be noted that each of the engaging portions 2 shown in FIGS.
In addition to c, 2d, and 2e, engaging recesses 11e are formed on the inner surface of the receiving port 11a of the pipe 11, respectively, and the packing 1 is elastically fitted into the engaging recesses 11e. The position shift of the packing 1 in the removal direction is prevented.

Next, in FIG. 4, the second reinforcing member 3 is attached along the outer surfaces of the flange portion 4a and the folded portion 4b.
The packing 5 of the embodiment is shown. This packing 5
Has a substantially cylindrical shape like the packing 1 of the first embodiment, and has two annular tongue pieces 5a, 5a on its inner peripheral surface. The flange portion 4a of the packing 5 abuts on the end face of the receiving port 11a, and the folded-back portion 4b is elastically pressed by the outer peripheral surface of the receiving port 11a to elastically sandwich the receiving port 11a.

Incidentally, FIG. 4 is similar to the piping example shown in FIG.
The case where the horizontal branch pipe 12 is connected to the connection port 11 of the drainage vertical pipe joint is illustrated, and 11c in the figure is a stopper formed to overhang at the back of the receiving port 11a in order to regulate the insertion amount of the horizontal branch pipe 12. Showing the edges. A cushioning sheet 11d made of rubber is attached to the side surface of the stopper edge 11c on the side of the receiving port 11a, which allows some extension of the lateral branch pipe 12 due to thermal expansion or the like, and directly contacts the stopper edge 11c. Abutment sound (impact sound) due to vibration etc. generated when contacting
Is prevented from occurring.

In the case of the second embodiment, the reinforcing member 3 is made of metal and is formed in an annular shape having a substantially L-shaped cross section.
It is attached so as to straddle both outer surfaces of the flange portion 4a and the folded portion 4b and cover the entire circumference. The packing 5 is attached to the inner surface side of the receiving port 11a, and after the receiving port 11a is sandwiched by the folded portions 4b, the packing 5 is attached later, and the outer peripheral side end 3a and the inner peripheral side end 3b are attached.
Are fixed by curling them all around.

According to the reinforcing member 3 thus attached, the flange portion 4a and the folded-back portion 4b are prevented from being deformed, so that the elastically sandwiched state of the receiving port 11a by the folded-back portion 4b is more firmly held, and by extension, It is possible to prevent the packing 5 from being pushed in due to the insertion operation of the pipe 12, and to more surely prevent the packing 5 from coming off when the pipe 12 is pulled out.

The reinforcing member 3 is made of metal and is attached in such a manner that it covers the outer surfaces of the flange portion 4a and the folded portion 4b over the entire circumference, and when the pipe 12 is connected, the visible portion of the packing body is not visible. Since it is eliminated, the packing 5 can be prevented from deterioration over time, and the packing 5 can be prevented from being burnt out in the event of a fire to prevent generation of harmful gas.

The reinforcing member 3 is not made of metal, but may be made of other noncombustible material, for example, ceramics. If it is not necessary to consider the burning of the packing 5, the reinforcing member 3 may be made of, for example, a synthetic resin instead of a non-combustible material. In short, if it is formed of a material having a certain rigidity. It is possible to provide a reinforcing function of preventing the deformation of the flange portion 4a and the folded portion 4b. Therefore, the reinforcing member 3 may be fitted in a plurality of places at appropriate intervals in the circumferential direction, instead of the configuration in which the reinforcing member 3 is formed in an annular shape and attached over the entire circumference of the flange portion 4a and the folded portion 4b as described above. Of course, even in this case, almost the same reinforcement can be performed.

Further, in the above-described embodiment, the reinforcing member 3 has been illustrated as a procedure of mounting the packing 5 on the inner peripheral surface of the pipe 11 and then retrofitting the outer surface of the flange portion 4a and the folded portion 4b. The reinforcing member 3 may be preliminarily attached by curling bending before mounting the packing 5 on the pipe 11.

Further, the reinforcing member 3 is not limited to the structure in which the entire circumference is curled and fixed as illustrated, and for example, as shown in FIG.
6a may be provided, and the reinforcing member 6 may be retrofitted or pre-mounted by bending the bent portion and sandwiching the end of the folded-back portion 4b. Further, the reinforcing member may be attached to the folded-back portion by using other means such as caulking, welding, adhesion, and concave-convex fitting.

Further, the reinforcing member may be attached by insert molding at the stage of manufacturing the packing 5. In this case, the reinforcing member is not limited to being attached to the outer surface of the flange portion or the folded portion, but is enclosed inside thereof. It may be configured to be attached in a closed state.

When the reinforcing member is attached by insert molding, for example, as shown in FIG.
Inner and outer edges 30a, 3 of the reinforcing member 30 having a V-shaped annular shape
0a with very small diameter (about 1.5 mm) engaging holes 30b-3
By providing 0b, the molding material (rubber) enters into the engagement holes 30b to 30b by insert molding (see FIG. 6B), and the inserted portion is engaged with the engagement hole 3b.
The reinforcing member 30 is more firmly attached to the packing main body 32 by being caught on 0b to 30b. The engagement holes 30b to 30b correspond to the engagement portion described in claim 8.

This engagement portion may have another form. For example,
As shown in FIG. 6C, the engaging claws 31b are formed on the inner and outer edges 31a and 31 of the reinforcing member 31 which is also annular and has a U-shaped cross section.
You may form up to 31b in the shape of cut and raised. The engaging claws 31b to 31b are embedded in the packing main body 32 side by insert molding so that the engaging claws 31b to 31b have a catching function (see FIG. 6D), whereby the reinforcing member 31 is firmly attached.

In addition, as the engaging portion described in claim 8, a plurality of ridges protruding toward the inner peripheral side or groove portions dented toward the outer peripheral side are provided at the inner and outer edges along the entire circumference or at appropriate intervals in the circumferential direction. The reinforcing member may be provided at a position, or may be embossed (roughening) on the peripheral surfaces of the inner and outer edges as an engaging portion to prevent the reinforcing member from coming off the packing body.

Next, FIG. 7 shows a state in which the upstream side drainage vertical pipe 14 is inserted and connected to the vertical pipe connection port 13 of the drainage vertical pipe joint 10 (see FIG. 3). In this case, the vertical pipe connection port 13 corresponds to the other pipe on the connection receiving side, and the drainage vertical pipe 14 corresponds to one pipe to be inserted and connected. In this case as well, a substantially cylindrical packing 7 is interposed between the vertical pipe connection port 13 and the drain vertical pipe 14.

Unlike the packings 1 and 5, the packing 7 has annular tongues 7b and 7 on the inner peripheral surface of the cylindrical body 7a.
It has a form having b. However, the flange portion 7c projecting to the outer peripheral side is provided on the entire periphery of the mounting rear end side (upper end in the drawing).
A fold-back portion 7e is formed so as to project from the outer circumference of the flange portion 7c toward the mounting tip side, and an annular reinforcing member 8 is curled and attached to the entire outer circumference of the flange portion 7c and the fold-back portion 7e. Is the same.

Tip of the cylinder body 7a on the mounting side (bottom end in the figure)
A buffer portion 7d having a substantially U-shaped cross section is integrally formed over the entire circumference. On the other hand, a stopper edge 13a is formed so as to project in the inner portion of the standpipe connection port 13, and a drainage standpipe 14 is abutted against the stopper edge 13a with the buffer portion 7d interposed therebetween. By connecting the drainage standpipe 14 to the standup connection port 13 of the drainage standup pipe joint 10 using the packing 7 having such a cushioning portion 7d, the standup pipe 14 does not directly contact the stopper edge 13a, so that Extension of the tube 14 due to thermal expansion is allowed,
Further, it is possible to prevent generation of abnormal noise (impact noise) generated by direct contact.

Next, an embodiment of the invention described in claim 1 will be described. This embodiment is different from the above-described various forms in that it is not provided with the folded portions 2b and 4b for sandwiching the receiving port 11a of the other tube. That is, as shown in FIG. 8, only the flange portions 19a and 19b are formed so as to extend over the entire circumference of the packing bodies 19e and 19f on the mounting rear end side, and the reinforcing members 19c and 19d are attached to the outer surfaces of the flange portions 19a and 19b. With this configuration, the deformation of the flange portions 19a and 19b that are in contact with the end surface of the receiving port 11a of the other pipe 11 is suppressed by the reinforcing members 19c and 19d, and thus the same effect as the above is obtained. be able to.

FIG. 8A shows a packing 19A having a flange portion 19a having an arcuate outer surface, and FIG. 8B shows a packing 19B having a flange portion 19b having an outer surface which is a flat surface. Flange portions 19a, 19
Reinforcing members 19c and 19d are formed according to the outer surface shape of b. The reinforcing members 19c and 19d can be mounted by curling bending as before, or can be mounted later, or may be integrally manufactured by insert molding at the packing manufacturing stage. Further, as shown in FIG. 8B, locking claws 19g to 19g are provided at a plurality of positions on the inner peripheral side of the reinforcing member 19d, and the locking claws 19g to 19g are provided on the flange portion 19a.
The reinforcing member 19d may be attached by being inserted into the slit 19h formed on the outer surface of b.

In the embodiment described above, the flange portion 4
a, 7c, 19a, 19b, reinforcing members 3, 8, 19c,
19d is attached to prevent the deformation, or the flanges 2a, 4a, 7c are provided with folded-back portions 2b, 4b, 7e, and the elastic sandwiching action of the packings 1, 5, 5
Although the configuration in which 7, 19A and 19B are attached to the receiving port 11a of the other pipe 11 has been illustrated, the configuration may be such that the packing 40 is screwed as shown in FIG. 9, for example.

The packing 40 of the third embodiment also has a flange portion 41 which is formed so as to project at the rear end of its mounting, and holes 42 to 42 for screwing are located in this flange portion 41 in three circumferential positions. Is formed in. A metal reinforcing member 43 is attached to the entire outer surface of the flange portion 41 so as to cover it. As shown in FIG. 9B as a single body, the reinforcing member 43 also has holes 4 in the flange portion 41.
Corresponding to Nos. 2 to 42, holes 43a to 43a are formed at circumferentially equally divided positions. On the other hand, the receiving port 11 of the other pipe 11
On the end face of a, screw holes 44 to 44 are formed at positions equally divided into three in the circumferential direction, corresponding to the holes 42 to 42 and 43a to 43a.

According to this structure, the holes 42 to 42 and the holes 43a are formed in the screw holes 44 to 44 on the end surface of the receiving port 11a.
To 43a are aligned, the flange portion 41 is brought into contact with the end surface of the receiving port 11a, and the reinforcing member 43 is covered on the flange portion 41.
When the packing 40 is inserted into the screw hole 44 and tightened into the screw hole 44, the packing 40 is attached such that the flange portion 41 is brought into contact with the end surface of the receiving port 11a and the outer surface of the flange portion 41 is covered with the reinforcing member 43. In addition, this packing 40
The mounting operation can be performed using a mounting jig described later.

In this way, the packing 40 has screws 45 to 4
5, the displacement of the one pipe 12 is reliably prevented when the one pipe 12 is inserted or removed, so that the packing 40 can be replaced quickly and easily, for example, when the pipe is renewed. The packing 40 is prevented from coming off due to an earthquake or the like. Further, also in the third embodiment, since the metallic reinforcing member 43 is attached, deterioration of the packing 40 can be reduced, and generation of harmful gas at the time of fire can be prevented in advance.

Next, a mounting method for mounting the various types of packing described above in the receiving port 11a of the other tube 11 and a mounting jig used in the method will be described. Two types of mounting jigs are illustrated. One is a packing that is not screwed (for example, the illustrated packings 1, 5, 7, 1
9A, 19B), and the other is used for mounting a screw type packing 40.

First, FIG. 10 shows a procedure for mounting the packing 51 of the type that is not screwed to the receiving port 11a of the other tube 11 by using the mounting jig 50. The mounting jig 50 includes a shaft portion 50a having an outer diameter substantially the same as that of one pipe (not shown, a pipe connected to the other pipe 11), and a flange portion formed to project laterally from the shaft portion 50a. It has 50b and a gripping portion 50d that further extends upward from the flange 50b in the figure. With the shaft portion 50a inserted in the inner peripheral side of the packing 51 and the flange portion 51a and the reinforcing member 51b abutted on the flange portion 50b, the packing 51 is moved to the jig 5
Set to 0.

After setting the packing 51 in this way,
The grip portion 50d is gripped, and as shown in FIG. 10 (A), the shaft portion 50a is inserted into the receiving opening 11a of the other pipe 11 with the packing 51 still set, whereby the packing 51 is received in the receiving opening of the other pipe 11. Push it into 11a. FIG.
As shown in (B), after the mounting jig 50 and then the packing 51 are pushed in until the flange portion 51a of the packing 51 contacts the end surface of the receiving port 11a, the packing 51 is held, for example, by hand to prevent the packing 51 from coming out. Figure 10
When the mounting jig 50 is pulled out as shown in (C), the mounting of the packing 51 is completed.

As described above, by mounting using the mounting jig 50 in the above-described procedure, the cylindrical packing 51 can be mounted in the receiving port 11a of the other pipe 11 quickly and reliably. In addition, the shaft portion 50a of the mounting jig 50
Has the same outer diameter as one of the tubes, the packing 51 can be mounted neatly along the inner surface of the receiving port 11a without wrinkling.

The packing 51 has a flange portion 51a.
Not only that, since the folded-back portion 51c is provided, the folded-back portion 51c may be positioned on the outer peripheral side of the receiving opening 11a and continuously pushed in while the flange portion 51a is brought into contact with the end surface of the receiving opening 11a. .

Here, as shown in the figure, the packing 51 is fitted in a retaining recess 52 formed on the inner surface of the receiving port 11a on the side of the main body to prevent the packing 51 from being detached after mounting. Retaining protrusion 51
d is formed. Therefore, at the stage of pushing in the receiving port 11a, the retaining protrusion 51d is inserted into the receiving port 11a.
When the packing main body portion is approached, the packing main body portion is pushed toward the inner diameter side, and when this is blocked by the shaft portion 50a, a large pushing resistance is generated and smooth mounting cannot be performed. In this respect, the shaft portion 50a of the mounting jig 50 is formed with a concave portion 50c having an arcuate cross section over the entire circumference thereof, and the concave portion 50c allows a partial deformation of the packing main body to the inner diameter side. Since it is, packing 5
1 can be installed smoothly with a light pushing force.

Moreover, when pulling out the mounting jig 50,
As shown in FIG. 10 (C), since the recess 50c is disengaged from the retaining projection 51d, the retaining projection 51d is pushed by the shaft portion 50a and fits into the retaining recess 52 of the receiving port 11a. The packing 50 is securely prevented from coming off.

The reinforcing member 51b has engagement holes 51e to 51e for retaining the same as the reinforcing member 30 illustrated above.
Are formed. Therefore, the reinforcing member 51b is
When the insert molding is performed, the molding material (a part of the packing main body) flowing into the engaging holes 51e to 51e is firmly attached so as to be caught by the packing main body.

Next, although not shown, the procedure for mounting the screw-fastening type packing 40 in the receiving port 11a and the mounting jig will be described. In this case, the flange portion 41 is provided on the flange portion of the mounting jig. Guide pins are provided corresponding to the holes 42 to 42 and the holes 43 a to 43 a of the reinforcing member 43. The length of the guide pin is set to a length that allows the guide pin to be inserted and protruded further. Others are the same as those of the jig 50.

The packing 40 is set on the mounting jig thus configured. In this case, the guide pins are inserted into the holes 43a to 43a of the reinforcing member 43 and the holes 42 to 42 of the flange portion 41 in advance. Others are the packing 51
Is the same as After setting in this manner, the packing 40 and the jig portion of the mounting jig are pushed into the receiving opening 11a in the same manner as described above. In this pushing step, the guide pins are aligned with the screw holes 44 to 44 arranged on the end face of the receiving port 11a, and if they are inserted as they are, the holes 4 of the reinforcing member 43 will be removed.
3a to 43a and the holes 42 to 42 of the flange portion 41 are aligned with the screw holes 44 to 44, respectively.
1 can be brought into contact with the end surface of the receiving port 11a.

After the pressing is completed, the mounting jig is taken out, and then the screws 45 to 45 are inserted into the holes 43a and 42 and tightened in the screw holes 44.
1 is attached to the end surface of the receiving port 11a, and the outer surface of the flange portion 41 is covered with the reinforcing member 43.

In the illustrated procedure, the reinforcing member 43 was attached at the same time as the packing. However, first, only the packing is attached to the receiving port 11a using a jig, and then the reinforcing member is set on the flange portion 41 and the screw 45 is attached. A procedure of tightening up to 45 may be performed.

The two types of mounting jigs exemplified above are
The same can be applied to packings (packings 19A and 19B) that do not have folded portions and are not screwed, or packings that do not have a reinforcing member (packing 1), and there is no retaining projection 51d. Even a packing or a packing having a reinforcing member without the engagement hole 51e (engagement portion) can be used for the mounting work.

[Brief description of drawings]

FIG. 1 illustrates an embodiment of the present invention, with the packing shown in longitudinal section, one tube shown in side view, and the other tube shown in longitudinal section.

FIG. 2 is a partial vertical cross-sectional view of a packing in a mounted state, showing various forms of engaging portions provided on an outer peripheral portion of a folded portion. (A) shows an engaging part having a square cross section, (B) shows an engaging part having a saw blade shape, and (C) shows an engaging part having a semicircular cross section.

FIG. 3 is a side view showing an example of piping in which a toilet bowl is connected to a drainage stack joint via a lateral branch pipe.

FIG. 4 is a diagram showing a packing mounting state in a state in which a lateral branch pipe is connected to a connection port of a drainage vertical pipe joint, (A)
Is a partial cross-sectional side view, and (B) is an enlarged view of part A of (A).

FIG. 5 is a perspective view showing an aspect of a reinforcing member.

6A and 6B are views showing a reinforcing member having various types of engaging portions with respect to the packing body, FIG. 6A is a view showing the reinforcing member alone with an engaging hole, and FIG. 6C is a partial vertical cross-sectional view of the packing, FIG. 6C is a view showing a reinforcing member provided with an engaging claw by itself, and FIG. 6D is a partial vertical cross-sectional view of the packing to which the reinforcing member is attached.

FIG. 7 is a partial cross-sectional side view showing a state in which the drainage stack is connected to the connection port of the drainage stack fitting using the packing of another aspect.

FIG. 8 is a view showing an embodiment according to claim 1, and is a longitudinal sectional view of an essential part showing a contact state of the flange portion with the other pipe, FIG. Shows a state where a reinforcing member with an arc cross section is attached,
(B) shows a state in which a reinforcing member having an L-shaped section is attached to a flange section having a rectangular section.

9A is a vertical cross-sectional view showing a mounted state of a screw-fastening type packing, and FIG. 9B is a plan view showing a single screw-fastening type reinforcing member.

FIG. 10 is a vertical cross-sectional view showing a procedure for mounting the packing in the receiving opening by using the mounting jig, where (A) shows the beginning of the jig pressing, (B) shows the completion of pressing, and (C). [Fig. 6] is a diagram showing a jig extracting stage.

FIG. 11 is a partial cross-sectional side view showing a state in which a vertical pipe is connected to a connection port by using a conventional packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Packing of 1st Embodiment 2a ... Flange part, 2b ... Folding part 3 ... Reinforcing member 5 ... Packing of 2nd Embodiment 11 ... Other pipe 11a ... Receiving port 12 ... One pipe 20 ... Conventional packing 30,31 ... Reinforcement member of another form 40 ... Screw-fastening type packing (3rd Embodiment) 43 ... Screw-fastening type reinforcement member 50 ... Mounting jig, 50a ... Shaft part, 50b ... Collar part

Claims (14)

[Claims] 1. A packing having a substantially cylindrical shape interposed between two pipes when inserting and connecting one pipe to the inner peripheral side of the other pipe. A pipe characterized by having a flange portion that projects to the outer peripheral side and abuts against the receiving end surface of the other pipe, and the flange portion is provided with a reinforcing member for preventing deformation of the flange portion. Packing for connection. 2. A packing having a substantially cylindrical shape which is interposed between two pipes when the pipes are inserted into and connected to the inner peripheral side of the other pipe, the packing being provided around the rear end side of the attachment. A fold-back that has a flange portion that projects to the outer peripheral side and abuts against the receiving end surface of the other tube, and that can project the mounting end side of the other tube and sandwich the receiving end portion of the other tube on the outer periphery of the flange Packing for pipe connection, characterized by having a section. 3. The packing according to claim 2, wherein the folded-back portion is provided with an engaging portion that engages with the outer peripheral surface of the receiving opening of the other pipe in a concave-convex direction. Packing. 4. The packing according to claim 2, wherein a reinforcing member for preventing deformation of the flange portion, the folded portion, or both is attached to the flange portion, the folded portion, or both. Packing for pipe connection. 5. The packing according to claim 1 or 4, wherein the reinforcing member is made of an incombustible material and has an annular shape capable of covering the outer surfaces of the flange portion and the folded portion. Packing for pipe connection. 6. The packing according to claim 1 or 4, wherein the reinforcing member is configured to be retrofittable to the packing mounted on the other tube. 7. The packing according to claim 1 or 4, wherein the reinforcing member is attached in advance by insert molding. 8. The packing according to claim 6 or 7, wherein the reinforcing member is provided with an engaging portion for preventing the packing from coming off. 9. The packing according to claim 1 or 2, wherein the flange portion is screwed to the receiving end surface of the other pipe. 10. A jig for mounting the packing according to claim 1 or 2 on the other pipe, comprising a shaft portion having the same outer diameter as that of the one pipe, and a flange portion protruding from the shaft portion. A fitting for a packing for pipe connection, which is characterized by being equipped. 11. A jig for mounting the packing according to claim 9 on the other pipe, comprising a shaft portion having the same outer diameter as that of the one pipe, and a flange portion protruding from the shaft portion. A fitting jig for a packing for pipe connection, characterized in that a guide pin is provided in the collar portion so as to correspond to a hole for screwing a flange portion. 12. The mounting jig according to claim 10 or 11, wherein the shaft portion is provided with a recess for allowing the retaining protrusion provided on the packing to escape inward in the radial direction. Packing attachment jig. 13. A method of mounting a packing on the other tube by using the mounting jig according to claim 10 or 12.
The flange is brought into contact with the flange of the mounting jig to set the packing around the shaft, and the shaft is inserted into the other pipe in the set state, and the flange is used by the flange. Is brought into contact with the receiving end surface of the other pipe, and then the mounting jig is pulled out from the packing to mount the packing on the other pipe. 14. A method for mounting a packing on the other pipe by using the mounting jig according to claim 11 or 12,
Insert the guide pin of the mounting jig into the hole for screwing the flange part of the packing, and bring the flange part into contact with the flange part to set the packing around the shaft part. The flange portion is inserted into the other pipe by inserting the shaft portion into the other pipe, and the guide pin is inserted into a screw hole for screwing a flange portion provided on the receiving end face of the other pipe. After contacting the end face of the
A method for mounting a packing for connecting pipes, wherein the mounting jig is pulled out from the packing and the packing is mounted on the other tube.