JP2006307479A - Packing for drain pipe and drain pipe connection method using the packing for drain pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing for a drain pipe and a drain pipe connection method using the packing for drain pipe enabling the very easy attachment and detachment of the packing and the close-fitting of a drain pipe to an outer peripheral part and capable of securely preventing the packing from coming out of the drain pipe and odor from leaking out of the drain pipe. <P>SOLUTION: The body of the packing 20 for the drain pipe is formed of an elastic material such as a rubber and a soft synthetic resin in a roughly Japanese drum shape, and vertically divided into two parts to form right and left side packing bodies 20R and 20L. The joining parts 20R1, 20R1 and 20L1, 20L1 of these right and left side packing bodies 20R and 20L are so formed that, when serrated recesses and projections are vertically continuously formed on the joining parts and the right and left side packing bodies 20R, 20L are assembled, the recessed and projected joining parts 20R1, 20R1 and 20L1, 20L1 can be engaged with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a packing for connecting a sewer pipe and a drain pipe, and a drain pipe connecting method using the drain pipe packing.

In order to prevent the drainage from leaking from the connecting part between the drain and the drain pipe when the drainage flows backward, an adapter that connects the drain and the drain pipe is attached. For example, those shown in Patent Document 1 are known.

JP 2002-235350 A

  As shown in FIG. 9, the packing D shown in Patent Document 1 is configured such that the convex strip 5 a of the drain pipe 5 is fitted into the concave portion 6. That is, the packing D is provided with a spiral recess 6a or 6b, and by rotating the packing D to the drain pipe 5, the packing D is inserted into the recess 6a or 6b so that the ridge 5a is fitted therein. Insert it. The flange 4 of the cap nut B is supported by the sewer pipe 18, the lower end surface of the packing D is water-tightly crimped to the flange 3 of the cap nut B, and the packing D and the drain pipe 5 are supported. ing.

From this state, when the screw groove 2 provided on the upper outer peripheral surface of the cap nut B is engaged with the screw groove 1 provided on the inner peripheral surface of the cap nut A and the cap nut A is rotated, the cap nut A is lowered and the ring C Press down. And since the taper surface of the downward expansion shape of the ring C press-contacts with the taper surface of the outer peripheral surface of the packing D, the packing D is comprised so that it may be gradually pressed on the drain pipe 5 side as the ring C descends. As a result, the ridges 5a of the drain pipe 5 are firmly fitted into the recesses 6a or 6b of the packing D, and at the same time, the inner peripheral surface of the packing D is firmly fitted into the outer peripheral face 5b of the drain pipe 5. The gap between the packing D and the drain pipe 5 is closed as much as possible, and the drainage can be effectively prevented from flowing back through the bellows outer periphery of the drain pipe 5. Has been.

However, since the conventional packing D is integrally formed in a cylindrical shape, when it is inserted into the drain pipe 5, it must be inserted while rotating from the lower end of the drain pipe 5. Moreover, it must be inserted while engaging the convex shape 5a on the outer peripheral portion of the bellows and the concave portions 6a and 6b of the packing D, and this work is very complicated and the workability is poor. Had.

The present invention was devised in view of the present situation, and the object of the present invention is to very easily attach and detach the packing, and to close the engagement with the bellows outer peripheral portion of the drain pipe. The present invention is intended to provide a drainage pipe packing that can reliably prevent the drainage and odor leakage from the sewer pipe, and a drainage pipe connection method using the drainage pipe packing.

  In order to achieve the above object, the invention according to claim 1 is characterized in that the packing for drainage pipes is formed by dividing the packing for connecting the sewage pipes and drainage pipes into a plurality of parts vertically.

Further, the invention according to claim 2 is based on the technical premise of the drain pipe packing according to claim 1, and the joint portions of the divided packings are formed in a concavo-convex shape. It is characterized by being formed so that the uneven | corrugated | grooved part may be meshed | engaged.

Next, the invention described in claim 3 is characterized in that the drain pipe packing is formed so as to be able to expand and contract by vertically cutting a part of the packing connecting the sewer pipe and the drain pipe.

Further, the invention described in claim 4 is based on the technical premise of the drain pipe packing according to claim 3, and forms the cut-out joint portion in a concavo-convex shape, and when assembled, the concavo-convex portion between each other. Are formed so as to be engaged with each other.

Furthermore, the invention according to claim 5 is based on the technical premise of the drain pipe packing according to claim 2 or claim 4, and the concave and convex portions are formed in a saw blade shape. To do.

Next, the invention according to claim 6 is based on the technical premise of the drain pipe packing according to claim 2 or claim 4, and the uneven portion is formed in a substantially S shape. Features.

The invention described in claim 7 is based on the technical premise of the drain pipe packing according to any one of claims 2 to 6, and a plurality of the concave and convex portions are formed continuously in the vertical direction. It is characterized by.

Further, the invention according to claim 8 is based on the technical premise of the drain pipe packing according to any one of claims 1 to 7, and the inner peripheral surface of the packing is integrally assembled from a divided state. When the cut portion or the cut portion is joined, a spiral convex portion that contacts the outer peripheral portion of the drain pipe is formed.

Furthermore, the invention described in claim 9 is characterized in that the drain pipe and the sewage pipe are joined using the drain pipe packing according to any one of claims 1 to 8.

  As described above, in the invention according to claim 1, since the packing for drainage pipes is formed by dividing the packing for connecting the sewer pipe and the drainage pipe into a plurality of lengths, the packing is used as the drainage pipe. At the time of attachment, the packing can be easily attached to the drain pipe by bringing each divided packing into contact with the outer peripheral surface of the drain pipe. Of course, when removing, since the packing is divided | segmented, it can remove easily.

In the invention according to claim 2, since the joint portion of each of the divided packings is formed in a concavo-convex shape and formed so that the concavo-convex portions are engaged with each other when assembled. Is not released in the vertical direction, so that a strong engagement state can be maintained.

In the invention according to claim 3, since the drain pipe packing is formed so as to be expandable / contractible by vertically cutting a part of the packing connecting the sewer pipe and the drain pipe, when the packing is attached to the drain pipe, The packing portion can be easily attached to the drainage pipe by opening the cut portion to the left and right and fitting the drainage tube, and then closing and joining the cut portion. Of course, also when removing, it can remove simply by expanding from the notch part of packing to right and left.

Further, the invention according to any one of claims 4 to 7 is characterized in that the cut joint portion is formed in a concave / convex shape such as a saw blade shape or a substantially S-shape, and when assembled, Since the portions are formed so as to be engaged with each other, the packing does not come off in the vertical direction, so that a strong engagement state can be maintained.

Furthermore, the invention described in claim 8 is a spiral shape that comes into contact with the outer peripheral portion of the drain pipe when the inner peripheral surface of the packing is integrally assembled from the divided state or the cut portion is joined. Since the convex part is formed, the contact with the outer peripheral part of the drainage pipe can be made dense, and the removal from the sewer pipe and the odor leakage can be surely prevented.

Furthermore, since the invention according to claim 9 is configured to join the drain pipe and the drain pipe using the drain pipe packing according to any one of claims 1 to 8, Omission and odor leakage can be reliably prevented.

  Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the accompanying drawings.

  FIG. 1 is an explanatory view showing an attached state of a drain pipe packing according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a state where the drain pipe packing is divided, and FIG. 3 is a division of the drain pipe packing. FIG. 4 is a cross-sectional view showing a state in which the drain pipe and the drain pipe are joined using the drain pipe packing. In the first embodiment, the same components as those described in the conventional example are denoted by the same reference numerals as those in the conventional example, and detailed description thereof is omitted here.

  That is, the drain pipe packing 20 according to the first embodiment has a main body formed in an approximately Japanese drum shape made of an elastic material such as rubber or soft synthetic resin divided into two vertically and is divided into left and right packing bodies 20R and 20L. As shown in FIG. 2, the joints 20R1, 20R1 and 20L1, 20L1 of the left and right packing bodies 20R, 20L are continuously formed with sawtooth-shaped irregularities, as shown in FIG. When the main bodies 20R and 20L are combined, the concave and convex joint portions 20R1, 20R1 and 20L1, 20L1 are formed to be engaged with each other. By comprising in this way, since this packing 20 does not slip | deviate to an up-down direction, a strong engagement state can be hold | maintained. In addition, the code | symbol G in a figure shows a cylindrical member.

  Further, on the inner peripheral surface of the packing 20, as shown in FIG. 3, when the left and right packing bodies 20 </ b> R and 20 </ b> L are combined, a spiral convex portion 21 that comes into contact with the bellows outer peripheral portion 5 a of the drain pipe 5. Is protruding.

  In the first embodiment, the joint portions 20R1, 20R1 and 20L1, 20L1 of the left and right packing bodies 20R, 20L are formed by sawtooth-shaped uneven portions that are continuous in the vertical direction. For example, as shown in FIG. 5, it is formed in the form of a continuous pulse wave as shown in FIG. 5, or it is formed in a substantially S shape as shown in FIG. As shown, it can also be formed in a generally square shape. In short, as long as the left and right packing bodies 20R and 20L are shaped so as not to be displaced in the vertical direction, the joints 20R1 and 20R1 and the concave and convex portions of the left and right packing bodies 20R and 20L may be formed in any way. Absent.

  Next, a procedure for connecting the sewer pipe 18 and the drain pipe 5 with the packing 20 configured as described above will be described. First, as shown in FIG. 1, the cylindrical member G and the sewer pipe 18 are bonded together. Then, it is inserted into the drainage pipe 5 and the cylindrical member G. Next, at a position corresponding to the upper end portion of the cylindrical member G, the drainage pipe 5 is sandwiched between the left and right packing bodies 20R and 20L, and a saw blade shape that is continuous in the vertical direction. The concave and convex joint portions 20R1, 20R1 and 20L1, 20L1 are meshed with each other.

Next, when the cap nut B is rotated and lowered along the drain pipe 5, the ring C is also lowered synchronously, and as shown in FIG. 4, the downwardly expanding tapered surfaces Ca and Ca of the ring C are formed. Since the ring 20 is pressed against the tapered surface 22 (22R, 22L) on the outer peripheral surface of the packing 20, the packing 20 is gradually tightened to the drain pipe 5 side as the ring C is lowered. At this time, since the concavo-convex joints 20R1, 20R1 and 20L1, 20L1 are engaged with each other, the packing 20 is not displaced in the vertical direction.

By tightening the packing 20 in this manner, the engagement with the bellows outer peripheral portion 5a of the drain pipe 5 can be made dense, and the removal from the sewer pipe 18 and the odor leakage can be reliably prevented. Further, at this time, the lower end portion of the packing 20 is tightly pressure-bonded with the inner flange portion of the cylindrical member G, so that it is also possible to reliably prevent the sewage pipe 18 from coming off and odor leakage. .

FIG. 8 shows a drainage pipe packing 30 according to a second embodiment of the present invention, and the packing 30 according to the second embodiment has a longitudinal cut in a part of a main body connecting the sewer pipe and the drainage pipe. The cut joint portion 31 is formed so as to be expandable and contractable, and the cut joint portion 31 is formed in a concavo-convex shape so that the concavo-convex portions are engaged with each other when assembled. As the shape of the concavo-convex portion, the shape of Example 1 or FIGS. 5 to 7 can be adopted. Of course, a convex portion 32 similar to that of the first embodiment is formed on the inner peripheral surface of the packing 30, and a tapered surface 33 is formed on the outer peripheral surface as in the first embodiment.

Since the packing 30 according to the second embodiment is configured as described above, when the packing 30 is attached to the drainage pipe, a finger is placed on the joint portion 31 to expand it to the left and right to form a drainage pipe. After the attachment, this is closed and the joints 31 are butted together. Thereafter, as in the first embodiment, the packing 30 can be easily attached to the drain pipe by rotating the cap nut and lowering the ring. . Of course, when removing, it can remove easily by performing the procedure reverse to the above procedure.

In the first embodiment, the case where the packing is divided into two parts has been described as an example. However, the present invention is not limited to this and may be divided into two or more parts. In the above embodiment, the case where the present invention is applied to a bellows-shaped sewage pipe has been described as an example. However, the present invention is not limited to this, and a vinyl chloride pipe having a smooth outer peripheral surface is used. Can also be applied.

It is explanatory drawing which shows the attachment state of the packing for drain pipes which concerns on Example 1 of this invention. It is a perspective view which shows the state which divided | segmented the packing for the said drain pipes. It is sectional drawing in the state which the packing for the said drain pipes divided | segmented. It is sectional drawing which shows the state which joined the sewer pipe and the drain pipe using the packing for drain pipes. It is a perspective view which shows the other example 1 of the junction part of the same drain pipe packing. It is a perspective view which shows the other example 2 of the junction part of the same drain pipe packing. It is a perspective view which shows the other examples 3 of the junction part of the same drain pipe packing. It is explanatory drawing which shows the attachment state of the packing for drain pipes concerning Example 2 of this invention. It is sectional drawing which shows the example of attachment of the conventional packing for drain pipes.

Explanation of symbols

B Cap nut C Ring G Cylindrical member 5 Drain pipe 5a Bellows outer peripheral part of drain pipe 18 Sewage pipe 20, 30 Packing 20R, 20L Packing body 20R1, 20L1, 31 Joint part 21, 32 Convex part 22, 33 Tapered surface

Claims (9)

  A packing for drainage pipes, characterized in that a packing for connecting a sewer pipe and a drainage pipe is vertically divided into a plurality of parts. 2. The drain pipe according to claim 1, wherein the joint portion of each of the divided packings is formed in a concavo-convex shape and is formed so that the concavo-convex portions are engaged with each other when assembled. Packing.   A packing for drainage pipes characterized in that a part of the packing connecting the sewer pipe and the drainage pipe is vertically cut to allow for expansion and contraction.   The packing for drainage pipes according to claim 3, wherein the cut-out joint portion is formed in a concavo-convex shape, and is formed so that the concavo-convex portions are engaged with each other when assembled.   The drainage packing according to any one of claims 2 and 4, wherein the uneven portion is formed in a saw blade shape.   The drainage pipe packing according to any one of claims 2 and 4, wherein the uneven portion is formed in a substantially S shape. The drainage packing according to any one of claims 2 to 6, wherein a plurality of the uneven portions are formed continuously in the vertical direction.   The inner peripheral surface of the packing is formed with a spiral convex portion that comes into contact with the outer peripheral portion of the drain pipe when assembled from the divided state or when the cut portion is joined. The packing for drain pipes in any one of Claims 1 thru | or 7 characterized by these.   A drainage pipe connecting method, wherein the drainage pipe packing according to any one of claims 1 to 8 is brought into contact with an outer peripheral surface of the drainage pipe.

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