JP2007170567A - Rubber ring attached to joint of case body and joint structure of case body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber ring capable of obtaining stable sealing property even when a case body quakes due to earthquake and preventing its breakage caused by mutual interference of joints and to provide a joint structure of the case body. <P>SOLUTION: In this rubber ring and the joint structure of the case body, this rubber ring is provided with a sealing part attachable to opposing faces of the joint on one side among the male type joint and the female type joint of the case body constituted to enable faucet fitting and a tongue piece part formed integrally with the sealing part and being attachable to a tip face of the joint on one side, the sealing part has a basic part attached to the joint on one side and a lip part formed so as to come into pressure-contact with opposing faces of the joint on the other side, and the tongue piece part is formed to exist between the tip face of the joint on one side and a stepped face of the joint on the other side when the case body is fitted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a box body such as a box culvert (including a tube body such as a circular tube or a square tube, a box body, a cylinder body, etc.) The present invention relates to a rubber ring interposed therebetween and a joint structure of a box using the rubber ring.

A seal member used for a box that can be fitted with a conventional spigot fitting is mounted by rotating an elastic body such as a rubber ring around the male (or female) facing surface, and press-fitting the male and female joints. The water-tightness is ensured by the rubber ring fitted and pressed.
JP 2005-054883 A

As the conventional rubber ring is provided closer to the tip of the opposing surface of the joint, the longer the rubber ring can be moved in and out, the longer the coupling between the box joints due to earthquakes and other vibrations. Even when the movement is large, the sealing performance can be ensured.
However, since the amount of movement of the rubber ring is large, the rubber ring tends to bend or break due to the pressing force and tensile force applied to the rubber ring, and in addition, the concrete around the base of the rubber ring is subject to the pressing force and tensile force that the rubber ring receives. Since the reaction force against the force is insufficient, the external force cannot be resisted, and there is a problem that the concrete is chipped or the rubber ring is detached.

  In addition, the gap between the opposing surfaces of the male joint and female joint is less likely to be damaged due to the interference of rubber rings, but the tip surface of one joint and the stepped surface of the other joint are subject to earthquakes, etc. The vibrations of each other interfere with each other, causing joint damage.

  Therefore, the present invention can obtain a stable sealing performance even when a box culvert or the like is vibrated due to an earthquake or the like, and prevents damage due to interference between the joints. An object of the present invention is to provide a rubber ring and a joint structure of the box with little accompanying damage.

Accordingly, a first invention of the present application made to achieve the above object is a rubber ring attached to one of a male joint and a female joint of a box which is configured to be able to fit in the slot, and the rubber The ring includes a seal portion that can be attached to an opposing surface of the one joint, and a tongue piece portion that is formed integrally with the seal portion and can be attached to a distal end surface of the one joint. A base portion attached to the one joint, and a lip portion formed so as to be press-contactable with an opposing surface of the other joint, and the tongue piece portion includes a tip surface of the one joint and the other side when the box is fitted. A rubber ring is provided which is formed so as to be interposed between a stepped surface of a joint.
Moreover, 2nd invention of this application provides the rubber ring as described in 1st invention of this application characterized by the said tongue piece part having formed intermittently or continuously with respect to the said seal part. It is.
Further, a third invention of the present application is a box joint structure configured to be able to fit in, and the rubber ring according to either the first invention or the second invention of the present application is connected to the male joint of the box. Are attached to one of the female joints, and the seal portion of the rubber ring is arranged so as to be press-fitted between the opposing surfaces of the one joint joint and the other joint, The present invention provides a box joint structure, wherein the tongue piece is disposed so as to be interposed between the front end surface of the one joint and the step surface of the other joint.
The fourth invention of the present application is the third invention of the present application, wherein at least one of the seal part and the tongue piece part of the rubber ring is attached to one joint by an adhesive. The box joint structure described is provided.
The fifth invention of the present application is characterized in that at least one of the seal part and the tongue piece part of the rubber ring is attached by integrally molding with one joint, 4 A box joint structure according to the invention is provided.
The sixth invention of the present application is characterized in that at least one of the opposing surfaces of the male joint and the female joint is formed in parallel with the axial direction of the box. The box joint structure according to any one of the fifth to fifth aspects of the invention is provided.

  The present invention can simultaneously obtain the following effects by means for solving the above-described problems.

(1) Improving cushioning properties The cushion ring material is provided with the tongue piece of the rubber ring according to the present invention between the tip surface of one joint of the male joint and the female joint and the stepped surface of the other joint. Therefore, damage due to interference between the joints can be prevented.

(2) Improvement of sealing performance Even when the rubber ring seal portion according to the invention is subjected to a pressing force and a tensile force due to a vibration such as an earthquake or an earthquake, the rubber ring tongue portion resists the external force. Can be prevented from being twisted, twisted, and accompanying damage, and the sealing performance is improved.

  In particular, by arranging the seal portion in the vicinity of the front end surface of the joint, it is possible to ensure a long entrance / exit length of the seal portion, and it is possible to maintain the sealing performance even for large-scale vibrations.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Overall Configuration FIG. 1 is a cross-sectional view when the rubber ring 1 according to the present invention is attached to the male joint 4, and FIG. 2 is an enlarged view of the periphery of the rubber ring 1 attached in FIG. is there.
First, the male joint 4 and the female joint 5 of the box will be described. In this embodiment, the joint provided with a convex portion on the inner side of the box is defined as a male joint 4, and the joint provided with a convex portion on the outer side of the box is defined as a female joint 5. It can be attached to both the male joint 4 and the female joint 5, and is not limited to this embodiment.
Further, as shown in FIG. 1, the male joint 4 and the female joint 5 are configured by facing surfaces 41 and 51, tip surfaces 42 and 52, and step surfaces 43 and 53 for enabling fitting with a spigot. .

Note that at least one or both of the facing surfaces 41 and 51 can be formed in parallel to the axial direction of the box.
<2> Rubber wheel 1

A rubber ring 1 according to the present embodiment is attached to a male joint 4 among a male joint 4 and a female joint 5 of a box that are configured to be fitted with an inlay, and the male joint 4 and the female joint 5 It is a member interposed between the two.
The rubber ring 1 is formed integrally with the seal portion 2 that can be attached to the opposing surface 41 of the male joint 4, and can be attached to the front end surface 42 of the male joint 4. At least the tongue piece 3 is provided.
Below, each member is demonstrated.

<3> Seal part 2
The seal portion 2 includes a base portion 21 that is attached to the facing surface 41 of the male joint 4 and a lip portion 22 that is provided above the base portion 21 so as to be pressed against the facing surface 51 of the female joint 5. .
The lower portion of the base portion 21 can be attached by a known joining method such as an adhesive after the male joint 4 is molded, and the lip portion 22 is configured to be capable of being pressed against the facing surface 51 of the female joint 5 when fitted. . Specifically, a conventionally known form in which a groove is provided on a surface in contact with the facing surface 51 is used.

<4> Tongue piece 3
The tongue piece portion 3 is formed so as to hang downward from one side of the base portion 21 of the seal portion 2, and a known joining method such as an adhesive is attached to the distal end surface 42 of the male joint 4 when the rubber ring 1 is attached. It is configured to be attachable by.

Although the length H ₁ of the tongue piece 3 is not particularly limited, it is generally smaller than the length H ₀ of the tip surface 42 so as not to protrude from the tip surface 42 into the box. is there.

Further, the thickness T ₁ of the tongue piece 3 is approximately equal to the width of the gap provided in advance between the front end surface 42 and the stepped surface 53 when the box is fitted with the male and female.

[Action when fittings are fitted]
Next, the operation of the rubber ring 1 when the male joint 4 to which the rubber ring 1 according to this embodiment is attached is press-fitted into the female joint 5 will be described.
FIG. 3 is a sectional view in the middle of fitting between the male joint 4 and the female joint 5 to which the rubber ring 1 according to this embodiment is attached.
Referring to FIG. 3, the seal portion 2 is attached to the male joint 4 by fitting the lip portion 22 of the rubber ring 1 attached to the male joint 4 to the opposing surface 51 of the female joint 5 while being pressed. It is pulled in the direction of the step surface 43. At this time, the tongue piece 3 attached to the distal end surface 42 resists the tensile force received by the seal portion 2, thereby restraining the seal portion 2 from twisting or twisting. Accordingly, the gap between the opposing surfaces 41 and 51 can be reliably sealed with water without causing damage due to twisting or twisting of the seal portion 2.

[Fitting structure]
Next, the structure after press fitting the male joint 4 to which the rubber ring 1 is attached to the female joint 5 will be described.
FIG. 4 is a cross-sectional view showing the joint structure when the male joint 4 and the female joint 5 to which the rubber ring 1 according to this embodiment is attached are press-fitted.
Referring to FIG. 4, since the tongue piece 3 of the rubber ring 1 is interposed between the front end surface 42 of the male joint 4 and the step surface 53 of the female joint 5, it functions as a cushion material.
Therefore, damage to the joint end due to interference between the male joint 4 and the female joint 5 can be prevented.

  Further, since the seal portion 2 attached to the facing surface 41 is moved forward to the vicinity of the front end surface 42, the horizontal movement between the male joint 4 and the female joint 5 is prevented. In addition, it is possible to secure a longer entry / exit length L that allows the seal portion 2 to be sealed with water, and since the seal portion 2 is reinforced by the tongue piece portion 3 described above, the rubber ring 1 can be used even during press fitting. Will not drown or twist.

FIG. 5 is a cross-sectional view showing the state of the joint structure when a deviation occurs between the male joint 4 and the female joint 5.
Even when the box vibrates due to an earthquake or the like, since the gap between the joints can be allowed by the length L that can be sealed by the seal portion 2, A higher sealing property can be obtained.

  By using the rubber ring 1 according to this embodiment, the length of the seal portion 2 can be secured, and the two problems of reinforcing the seal portion 2 at the time of press-fitting can be solved simultaneously to improve the sealing performance. It is possible to prevent damage to the joint end due to interference between the joints.

FIG. 6 shows a perspective view of the second embodiment of the present invention.
The tongue piece 3 on the rubber ring 1 does not have to be provided all around the male joint 4 of the box, and may be provided partially or intermittently in the circumferential direction as shown in FIG. .
As for the arrangement of the tongue piece portion 3, it is desirable from the manufacturing surface and construction surface of the rubber wheel 1 to be provided at the location of the straight line portion of the circular locus of the male joint 4.

FIG. 7 shows a cross-sectional view of a third embodiment of the present invention.
The male joint 4 shown in FIG. 7 is configured by newly providing a groove 44 at the intersection of the facing surface 41 and the tip surface 42 and attaching the base 21 of the rubber ring 1 to the groove 44.
At this time, the tongue portion 3 and the side surface 441 of the groove portion 44 are resisted by the adhesive force against the external force that the seal portion 2 of the male joint 4 receives, and the external force received when the male joint 4 is pulled out. On the other hand, since the side surface 441 of the groove portion 44 resists, the seal portion 2 can be reinforced more strongly and the sealing performance can be enhanced.
When the groove 44 of the male joint 4 is partially provided in the circumferential direction of the male joint 4, the thickness of the base 21 of the rubber ring 1 is adjusted so as to match the arrangement shape of the groove 44. You may comprise so that it may each change.

FIG. 8 shows a cross-sectional view of a fourth embodiment of the present invention.
As shown in FIG. 8, the rubber wheel 1 may be provided with an anchor portion 211 below the base portion 21 of the rubber wheel 1. By embedding and integrating the anchor portion 211 when the male joint 4 is molded, the rubber ring 1 can be fixed more firmly, and the sealing performance can be improved. Further, the anchor portion 211 may be provided partially or intermittently with respect to the rotating direction of the male joint 4.

Sectional drawing of the male coupling 4 in Example 1 of this invention. FIG. 3 is an enlarged view of the periphery of the rubber wheel 1 attached in FIG. Sectional drawing in the middle of fitting of the joint structure in Example 1 of this invention. Sectional drawing after fitting of the joint structure in Example 1 of this invention. Sectional drawing which shows the state at the time of the vibration generation | occurrence | production of the joint structure in Example 1 of this invention. The fragmentary perspective view of the male coupling 4 in 2nd Example of this invention. Sectional drawing of the male coupling 4 in 3rd Example of this invention. Sectional drawing of the male coupling 4 in 4th Example of this invention.

Explanation of symbols

1: Rubber ring 2: Seal part 21: Base part 211: Anchor part 22: Lip part 3: Tongue piece part 4: Male joint 5: Female joint 41, 51: Opposing surface 42, 52: Tip surface 43, 53: Step surface 44: groove portion 441: side surface

Claims (6)

A rubber ring that is attached to one of the male joint and female joint of the box that is configured to allow inlay fitting,
The rubber ring has a seal portion that can be attached to the opposing surface of the one joint;
A tongue piece portion formed integrally with the seal portion and attachable to a tip surface of the one joint;
The seal portion has a base portion attached to the one joint, and a lip portion formed so as to be capable of being pressed against an opposing surface of the other joint,
The tongue piece is formed so as to be interposed between the tip end surface of one joint and the step surface of the other joint when the box is fitted.
Rubber ring. The rubber ring according to claim 1, wherein the tongue piece portion is formed intermittently or continuously with respect to the seal portion. A box joint structure configured to be able to fit in-lay,
The rubber ring according to claim 1 or 2 is attached to one of the male joint and female joint of the box,
The rubber ring seal portion is disposed so as to be press-fitted between opposing surfaces of the one joint and the other joint,
The tongue portion of the rubber ring is disposed so as to be interposed between the tip surface of the one joint and the step surface of the other joint,
Box joint structure. The box joint structure according to claim 3, wherein at least one of the seal part and the tongue piece part of the rubber ring is attached to one joint by an adhesive. 5. The box joint structure according to claim 3, wherein at least one of the seal part and the tongue piece part of the rubber ring is attached by being integrally formed with one joint. The box according to any one of claims 3 to 5, wherein at least one of the opposing faces of the male joint and the female joint is formed in parallel with the axial direction of the box. Joint structure.

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