JPH0714719Y2 - Rib pipe connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rib pipe connection structure in which the mounting structure of a natural or resin rubber ring for sealing at a joint portion of a rib pipe is improved.

[Conventional technology]

As this type of rib pipe connection structure, a structure as shown in FIGS. 5 and 6 is conventionally known. Here, in the joint portion of the rib pipes 101, 101 ′, when the insertion opening 101a of one rib pipe 101 is inserted into the receiving opening 101b of the other rib pipe 101 ′, the rubber ring 103 for sealing at the fitting portions of both, The space between the ribs 102, 102 is fitted between the ribs 102, 102 formed on the outer periphery of the rib pipe 101, and the outer peripheral surface of the rib pipe 101, 101 'is elastically contacted with the inner peripheral surface of the receiving port 101b by the compressive force when the rib pipes 101, 101' are fitted together. The structure is filled with.

[Problems to be solved by the device]

However, as the diameter of the rib pipe increases, the rib pitch generally increases and the rib height also increases, so that the gap between the ribs 102, 102 increases. For this reason, the amount of the material used for the rubber ring 103 filled here is extremely large as compared with the intended sealing effect, which is uneconomical. Further, the increase in the cross-sectional area of the rubber ring 103 is disadvantageous in terms of the diameter expansion work of the rubber ring when fitting the rubber ring to the rib pipe and the fitting work in the diameter expansion state.

[Purpose of device]

The present invention has been made based on the above-mentioned circumstances, and saves the material of the rubber ring and facilitates the mounting work without increasing the cross-sectional area of the rubber ring and expecting the required sealing effect. It is intended to provide a rib pipe connection structure devised so that the above can be performed.

[Means for Solving the Problems]

Therefore, in the present invention, at the joint portion of the rib pipe, when the insertion opening of one rib pipe is inserted into the receiving opening of the other rib pipe, in the connection structure of the rib pipes which seals through the rubber ring, A rubber ring having the groove is formed on the outer periphery in a state where the groove is fitted to the rib of the rib pipe, and the outer peripheral surface is elastically contacted with the inner wall of the receiving port of the other rib pipe. I am configuring.

[Action]

Therefore, even if the diameter of the rib pipe increases, the rib pitch increases, or the height of the rib increases,
It is sufficient for the rubber ring used for sealing to have a size that fits into the ribs, and it is possible to give an elastic contact force for a required sealing effect to the inner wall of the corresponding receiving port of the rib pipe. Therefore, the cross-sectional area of the rubber ring can be reduced to the necessary minimum, the material cost can be reduced, and the diameter expansion and installation work of the rubber ring can be realized with relatively small force, which is advantageous in terms of workability. Become.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In the embodiment shown in FIGS. 1 and 2, a rib pipe is used.
Since 11, 11 ′ are fitted to each other at their joints, the insertion opening 11 a at the end of one pipe 11 is connected to the other pipe 1.
When the rubber ring 13 is inserted into the receiving port 11b at the expanded end of 1 ', the rubber ring 13 is fitted to the rib 12 of the pipe 11. For this reason,
The rubber ring 13 is provided on its inner peripheral side with a groove 14 having a sectional shape which fits into the rib 12. Further, the rubber ring 13 is
A plurality of grooves 15 are provided on the outer peripheral surface for elastically contacting the inner wall of the receiving port 11b to ensure the contact state of the elastic contact surfaces between the grooves 15 when elastically deformed. Therefore, a sufficient sealing effect can be expected.

In the rib pipe connection structure having such a configuration, the ribs 12, 1
Even if the pitch interval of 2 is large or the rib height is high, the cross-sectional area of the rubber ring 13 at the joint portion between the rib pipes 11 and 11 'fits the rib 12 and the inner wall of the receiving port 11b. The material cost of the rubber ring 13 can be reduced as compared with the structure of the conventional example, as long as it can be elastically contacted with and exert the necessary sealing effect. Further, the fact that the cross-sectional area of the rubber ring 13 can be made as small as possible means that the force required for the diameter expansion work when fitting the rubber ring 13 to the rib pipe 11 is small, and the rib 12 in that state is small. It is possible to obtain a practical effect that the work of attaching to is also easy.

In another embodiment of the present invention shown in FIG. 3, the rubber ring 13 is used.
Has a fin portion 16 formed on one side thereof, and in the embodiment of FIG. 4, the rubber ring 13 has fin portions 16, 17 on both sides thereof.
Is formed. As described above, with the finned structure, the sealing effect of the rubber ring 13 can be greatly increased in a situation where the cross-sectional area is not increased so much.

[Effect of device]

The present invention has been described in detail above. The rubber ring is fitted to the rib of the rib pipe, and the rubber ring is elastically contacted with the inner wall of the corresponding rib pipe receptacle on the rib. The cross-sectional area can be made as small as possible, the required sealing effect can be exerted, and the material can be saved.
The practical effect that the workability in attaching the rubber ring to the rib pipe can be improved can be obtained.

[Brief description of drawings]

FIG. 1 is a partially broken perspective view showing an embodiment of the present invention,
FIG. 2 is an enlarged vertical cross-sectional view of the same main part, FIGS. 3 and 4 are enlarged vertical cross-sectional views of the main part showing another embodiment, and FIG. 5 is a partially broken perspective view showing a conventional example. FIG. 6 is an enlarged vertical sectional view of the main part. 11, 11 '... rib pipe, 11a ... inlet, 11b ... reception, 12 ... rib, 13 ... rubber ring, 14 ... recessed groove, 15 ... groove, 16,17 ... fin.

Claims (1)

[Scope of utility model registration request] 1. In a joint portion of a rib pipe in which ribs are projected on the outer periphery at predetermined intervals in an annular shape, a rubber ring is used to insert an end portion of one rib pipe into a receiving portion of the other rib pipe. In the sealing rib pipe connection structure, a rubber ring having the groove is formed on the outer periphery of the insertion opening of one rib pipe to be inserted, with the groove being fitted to the rib of the rib pipe. A rib pipe connection structure characterized in that the outer peripheral surface is elastically contacted with the inner wall of the receiving port of the other rib pipe.