JP3746821B2 - Elastic pipe joint mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stretchable pipe joint mechanism, which effectively prevents the slideable pipes from coming out as described above with respect to a mechanism in which both pipes to be connected are slidably connected. It is an object of the present invention to provide a mechanism that effectively prevents soil and sand from entering and damaging the sliding surface of the joint seal material in a road.
[0002]
[Prior art]
Making the pipes connected at the pipe joints connecting the pipe parts stretchable makes it possible to expand and contract due to temperature changes when the connected pipe is a long member as it is, and also the ground fluctuation Thus, it is indispensable to quickly respond to the above, and by enabling expansion and contraction in this way, damage in both the pipe section body and the joint mechanism can be avoided and an appropriate connection state can be formed and maintained.
[0003]
However, a typical example of the conventional method that enables expansion and contraction of such a connecting pipe body is as shown in FIG. 11, and lugs 32 are provided on both pipe bodies 30 and 30 connected by the joint part 31, respectively. The lugs 32 and 32 are connected by tie bolts 33, and both the pipe bodies 30 and 30 connected through the packing 34 provided in the joint portion 31 are slidable, so that the expansion and contraction due to the temperature change in the four seasons is appropriate. Therefore, damage to the pipe body 30 and the joint part 31 can be appropriately avoided.
[0004]
[Problems to be solved by the invention]
The tube connecting device as shown in FIG. 11 described above is capable of expanding and contracting both connected tube bodies 30 and 30 and does not damage each tube body 30 and joint portion 31 by such expansion and contraction. One of the tubular bodies 30 and 30 may be pulled out from the joint portion 31 due to the expansion and contraction of the bodies 30 and 30. That is, even if it is not pulled out by one expansion and contraction, the expansion and contraction is repeated due to aging, etc., so that it moves in either direction through the tie bolt 33 and one of the tubular bodies 30 and 30 is extracted from the joint portion 31. It becomes. For example, when the left tube 30 is in a fixed state, the right tube 30 is pulled to reach the pull-out limit, and when pulled further thereafter, the right tube 30 is pulled out.
[0005]
Moreover, in the case of underground piping, the surrounding earth and sand of the pipe body 30 is embedded in the peripheral side of the joint part 31, and the pipe bodies 30 and 30 expand and contract in such a state, so that the circumference of the pipe body 30 is increased. The side earth and sand enters the joint portion 31 and the intruded earth and sand impedes the action of packing in the joint portion 31 and further damages the seal member, so that an effective sealing relationship cannot be ensured in any case.
[0006]
Further, in the conventional system shown in FIG. 11 as described above, the joint mechanism is large, and the tie bolt 33 limits the twist angle between the two tubular bodies 30, 30. There are disadvantages such as the fact that the torsional displacement angle between 30 is often limited to cause mechanical problems.
[0007]
[Means for Solving the Problems]
The present invention has repeatedly studied to eliminate the disadvantages of the conventional ones as described above, adopting a split type cover, and constructing a locking relationship between the split type cover and the tubular body. The following is a successful solution to this problem.
[0008]
(1) The pipe end parts to be connected are connected to each other in a slidable manner through a packing housed in the joint member, and held between the two ring-shaped plate members outside the joint member mounting portion at the pipe end part. A split-type cover member is provided for attaching a ring-shaped engaging member provided with a piece and accommodating the entire engaging member, and the inner diameter of the end of the cover member is reduced to reduce the engaging member. An elastic pipe coupling mechanism characterized in that a retaining part for locking is formed.
[0009]
(2) The stretchability according to (1) above, wherein the locking portion is provided with a trapezoidal holding piece on the ring-shaped plate material, and the outer end portion of the ring-shaped plate material is used as a locking portion for the retaining portion. Pipe fitting mechanism.
[0010]
(3) The stretchable pipe joint mechanism according to (1) above, wherein the engaging part is disposed and fixed with a rectangular holding piece between a plurality of ring-shaped plate members.
[0011]
(4) A box-shaped locking member is attached to the outer surface of one tube end and the other tube intermediate portion, and the packing material provided on the inner surface of the one tube end is in the one tube end. The stretchable pipe joint mechanism according to the item (1), characterized in that it is bonded and sealed to the outer surface of the other inserted pipe body.
[0012]
(5) The pipe end parts to be connected are connected to each other in a slidable manner through a packing housed in the joint member, and the engaging parts are respectively attached to the outer side of the joint member mounting portion at the pipe end part. Cover portions for receiving and locking the locking portions provided at both ends of the stopper member and the joint member are separately disposed, and the locking portions and the locking portions are provided at the ends of the cover body. The stretchable pipe joint mechanism according to item (1), wherein a retaining portion that is locked to the body is formed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A specific embodiment of the present invention as described above will be described with reference to the accompanying drawings. One constitutional relationship according to the present invention is as shown in FIGS. 10 is connected in a slidable manner through a packing 2 built in the joint member 1 as in the prior art, but the attachment of the joint member 1 at each of the pipe end portions 10 and 10 is as described above. Each of the locking members 3 is fixed to the outside of each of the parts, and a split type cover part 4 for accommodating the locking part 3 is provided, and the locking member 3 is engaged with both ends of the split type cover part 4. A retaining portion 5 to be stopped is formed. As shown in FIG. 1, the split type cover parts 4, 4 are connected by a connector 8.
[0014]
However, in the structure shown in FIGS. 1 to 3, a plurality of trapezoidal holding pieces 14 are arranged in the radial direction on the ring-shaped plate member 13 in which the locking member 3 is formed in an annular shape, and thus held. The ring-shaped plate member 13 on which the piece 14 is disposed is used as a locking portion for the retaining portion 5 as described above, and the retaining portion 5 is a member separate from the ring-shaped plate member 13. Although what was attached is shown, the thing which bent the edge part of the ring-shaped board | plate material 13 depending on the case may be sufficient. The retaining portion 5 as described above reduces the inner diameter of the end portion of the cover portion 4 to prevent entry of earth and sand, and reinforces the edge portion of the cover portion 4 to withstand earth pressure.
[0015]
FIGS. 4 to 6 show another structural relationship according to the present invention, and the connection seal relationship using the pipe ends 10 and 10 and the packing 2 by the joint member 1 is the same as that of FIGS. The same applies to the cover part 4 having the retaining part 5, but as the locking part 3, as shown in FIG. 5, a rectangular holding piece 15 is provided between the two ring-shaped plate members 13, 13. The joint member 1 in FIGS. 1 to 3 is divided into two parts, whereas the one in FIGS. 4 to 6 is divided into four parts. All of these are connected by the connecting means 6, but the ones shown in FIGS. 4 to 6 generally have a configuration suitable for connecting a large-sized tube than those shown in FIGS.
[0016]
7 to 9 show still another structural relationship according to the present invention. That is, the packing 2 is interposed between the pipe end portions 20 and 20a, the packing 2 is attached to one large-diameter pipe body 20 by the attachment member 6, and the outer surface of the other small-diameter pipe body 20a is joined and sealed. A small locking member 7 is attached to the outer surface of the end portion of the diameter tube end portion 20, and the other small diameter tube end portion 20a is held by the ring-shaped plate member 13 similar to that shown in FIGS. A large-sized locking part 3 having a configuration composed of a piece 15 is attached, and the split-type cover part 4 that engages with the locking parts 7 and 3 is provided with a retaining part 5 at both ends thereof. It is the same as that of FIGS. 1-3 and FIGS. 4-6 as mentioned above.
[0017]
Furthermore, the stretchable pipe joint mechanism using the split type cover member 5 and the locking member 3 or 7 according to the present invention can be implemented as a structure as shown in FIG. That is, unlike the structure of FIGS. 1 to 9 described above as the tube end portion to be connected, in the case of the tube end portions 12 and 12 having the same diameter, the joint member 11 is provided between the tube end portions 12 and 12. The packings 2 and 2 housed in the joint member 11 are held in place by the locking portions 16 and the inner engagement portions 17 at the ends of the joint member 11. An auxiliary locking portion 18 is appropriately attached to the stop portion 16, and the above-described locking portion bodies 3 are respectively attached to the pipe end portions 12, 12, and the retaining portions 5, 5 are opposed to each other. The above-described split type cover members 4 are arranged separately.
[0018]
As described above, according to the present invention, the pipe end portions to be connected are connected to each other in a slidable manner through a packing built in the joint member, and are respectively locked outside the joint member mounting portion at the pipe end portion. A pipe connected by attaching a part and providing a split-type cover part that accommodates the engaging part, and forming a retaining part that engages the engaging part at the end of the cover part It is possible to expand and contract appropriately between the ends, and if the amount of sliding out (sliding amount) of one of the ends becomes large and slides beyond the pulling out limit, the other tube body via the split type cover unit The other tubular body is pulled in the direction of one tubular body, so that the tubular body is prevented from coming off at both tubular body connecting portions.
[0019]
The retaining portion is provided with a retaining piece on the ring-shaped plate member, and the outer end portion of the ring-shaped plate member serves as a retaining portion for the retaining portion. The locking and the accompanying pulling action as described above can be realized accurately.
[0020]
The locking part is formed by fixing and holding the holding pieces between the plurality of ring-shaped plate members, thereby forming a stable locking part and smoothly performing the pulling action by the split type cover part as described above. It is possible to prevent slipping out.
[0021]
The other tube in which the locking member is attached to the outer surface of one tube end and the other tube intermediate portion, and the packing material provided on the inner surface of the one tube end is inserted into the one tube end. By connecting and sealing to the outer surface of the body, a telescopic connection between the pipe bodies having different diameters is achieved, and a joint that prevents the pipe body from coming out is formed.
[0022]
The pipe ends to be connected are connected to each other in a slidable manner through a packing built in the joint member. A cover part for receiving and locking the locking part provided at both ends of the body and the joint member is provided separately, and the locking part and the locking part body are arranged at the ends of the cover part. By forming the retaining portions to be locked, it is possible to extend and contract between the two pipe bodies having the same diameter, and to effectively achieve the above-described prevention of the pipe body withdrawal.
[0023]
【The invention's effect】
According to the present invention as described above, the pipes to be connected are connected to each other in a stretchable manner, effectively preventing the slipping out of the pipes, and further improving the elongation performance and completely twisting between the pipes. In addition, it is allowed over 360 ° range, and in addition, in the case of underground buried pipes, it is possible to prevent soil and sand from entering the vicinity of the important packing part or sliding surface of the joint part and inhibiting its function. This is an invention that is industrially highly effective.
[Brief description of the drawings]
FIG. 1 is a side view showing one configuration of a stretchable pipe joint mechanism according to the present invention.
FIG. 2 is a cross-sectional view of what is shown in FIG.
3 is an end view of what is shown in FIGS. 1 and 2. FIG.
FIG. 4 is a side view showing another configuration according to the present invention.
FIG. 5 is a cross-sectional view of what is shown in FIG.
6 is an end view of what is shown in FIGS. 4 and 5. FIG.
FIG. 7 is a side view showing still another configuration according to the present invention.
8 is a cross-sectional view of what is shown in FIG.
9 is an end view of what is shown in FIGS. 7 and 8. FIG.
FIG. 10 is a partial cross-sectional view showing a main part of another configuration according to the present invention.
FIG. 11 is a partial cross-sectional view showing a typical example of a conventional stretchable pipe joint mechanism.
[Explanation of symbols]
1 Joint member 2 Packing 3 Locking body (large)
4 Split type cover member 5 Retaining part 6 Mounting member 7 Small locking member 8 Connector 10 Pipe end part 11 Joint member 12 End part 13 of the same diameter Ring-shaped plate material 14 Trapezoidal holding piece 15 Square holding piece 16 Locking Part 17 Inner engagement part 18 Auxiliary locking part 20 Large diameter tubular body 20a Small diameter tubular body 30 Conventional tubular body 31 Joint portion 32 Lug 33 Tie bolt

Claims (5)

In the case where pipe ends to be connected are connected to each other in a slidable manner through a packing built in the joint member , holding pieces are arranged between the two ring-shaped plate members on the outer side of the joint member mounting portion at the pipe end. A split-type cover part is provided for attaching the annular ring-shaped engaging part and accommodating the whole engaging part, and the end inner hole diameter of the cover part is reduced to engage with the engaging part. An elastic pipe joint mechanism characterized by forming a retaining part. 2. The stretchable pipe joint according to claim 1, wherein the locking member is provided with a trapezoidal holding piece on the ring-shaped plate member, and the outer end portion of the ring-shaped plate member is used as a locking portion for the retaining portion. mechanism. 2. The elastic pipe joint mechanism according to claim 1, wherein the engaging member is provided with a rectangular holding piece disposed and fixed between the plurality of ring-shaped plate members.   The other tube in which the locking member is attached to the outer surface of one tube end and the other tube intermediate portion, and the packing material provided on the inner surface of the one tube end is inserted into the one tube end. The stretchable pipe joint mechanism according to claim 1, wherein the seal is bonded and sealed to the outer surface of the body.   The pipe end parts to be connected are connected to each other in a slidable manner through a packing built in the joint member, and the latching part bodies are attached to the pipe end parts outside the joint member mounting portions, respectively. Cover parts for receiving and locking the locking parts provided at both ends of the joint member are disposed separately, and the locking parts and the locking parts are engaged with the ends of the cover parts. The stretchable pipe joint mechanism according to claim 1, wherein a retaining portion for stopping is formed.

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