JP2001050447A - Detachable pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detachable pipe that is free from joint separation posed by vibration and the like. SOLUTION: A first joint end 11 of a first pipe 10 has slits 12 that extend parallel to the axis until opening at the tip. A clamp 13 clamping the periphery of the first joint end 11 closes the slits 12 to diametrally constrict the first joint end 11, which is firmly pressed against a second joint end 21 of a second pipe 20. The clamp 13 fixed to the periphery of the first joint end 11 is protected against moving axially to render the first joint end 11 unconstricted. The clamp 13 is connectable to a stop 22. The connection of the clamp 13 fixed to the first pipe 10 to the stop 22 fixed to the second pipe 20 prevents these first and second pipes 10 and 20 from inching away.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a detachable pipe.

[0002]

2. Description of the Related Art In some cases, two pipes are detachably connected as seen in a connection between an exhaust muffler of a forklift and a tail pipe. When the two pipes are to be detachably joined as described above, the following method exists. That is, the radius of the inner circumference of the first pipe and the radius of the outer circumference of the second pipe are adjusted so that the outer circumference of the other pipe (the second pipe) is inscribed in the inner circumference of the first pipe. A slit is provided in the end on the joining side (first joining end), and the end of the second pipe (second joining end) is provided on the inner peripheral side of the first joining end of the first pipe. Part) and insert it,
This is a method of clamping with a clamp from above the outer peripheral surface of the first joint end of the first pipe. By clamping the outer peripheral surface of the first joint end of the first pipe with a clamp, the gap of the slit at the first joint end is closed, the diameter of the first joint end is reduced, and the first pipe The outer peripheral surface of the second joint end of the second pipe is crimped on the inner peripheral surface of the first joint end to join the first pipe and the second pipe.

[0003]

However, when the tailpipe is connected to the exhaust muffler by adopting this technique, the tailpipe may fall off due to vibration during running of the forklift.

[0004] That is, the second joint end of the second pipe is inserted and mounted on the inner peripheral side of the first joint end of the first pipe, and is mounted on the outer peripheral surface of the first joint end of the first pipe. The method of clamping with a clamp has a problem that the first pipe and the second pipe are disconnected due to vibration or the like. In particular, when the first pipe and the second pipe are installed in the vertical direction, there has been a problem that the lower pipe falls or the upper pipe slips downward.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a detachable pipe which does not lose its joint due to vibration or the like.

[0006]

SUMMARY OF THE INVENTION The inventor of the present invention has proposed an inner peripheral surface of a first joint end of a first pipe and an outer peripheral surface of a second joint end of a second pipe due to vibrations or the like only by tightening with a clamp. And came to slide, and recognized that the first pipe and the second pipe moved little by little, and the joint was disengaged.
Also, it was recognized that the clamp tightening the first joint end of the first pipe gradually moved due to vibration or the like, and the clamp was displaced from the first joint end. Therefore, as a result of repeated studies, the present inventor has found that a first pipe having a first joint end having at least one slit having an open end and extending parallel to the axial direction, and a first joint of the first pipe A second pipe having a second joint end detachably attached to an inner peripheral side of the joint end; and a second pipe fixed to an outer peripheral surface of the first joint end and the second joint end attached to the first joint end. A clamp for tightening the first joint end to reduce the diameter of the pipe while the second joint end of the pipe is mounted, thereby fixing the first joint end and the second joint end; And a stopper having one end fixed to the second pipe and the other end detachably connected to the clamp.

That is, the end of the first pipe joined to the second pipe, that is, the first joined end has at least one slit which is open at the tip and extends parallel to the axial direction. In a state where the end of the second pipe to be spliced with the first pipe, that is, the second spliced end is mounted on the inner peripheral side of the first spliced end, the clamp is connected to the first spliced end of the first pipe. If the outer peripheral surface of the is tightened, the gap of the slit is closed, the diameter of the first joint end is reduced, and the first joint end of the first pipe and the second joint end of the second pipe are crimped. And can be fixed. The clamp is connected to a stopper having one end fixed to the second joint end of the second pipe. Since the clamp fixed to the first joint end of the first pipe is connected to the stopper fixed to the second joint end of the second pipe, the second joint end mounted by vibration or the like A situation in which the outer peripheral surface of the portion and the inner peripheral surface of the first joint end slide and the first pipe and the second pipe move little by little can be prevented. Further, since the clamp is fixed to the outer peripheral surface of the first joint end of the first pipe, it is possible to prevent the clamp from moving in the axial direction due to vibration or the like and preventing the first joint from being reduced in diameter. be able to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a detachable pipe according to the present invention will be described with reference to an embodiment shown in the drawings. FIG. 1 shows a first embodiment. In the present embodiment, a first joint end 11 which is an end to which the first pipe 10 is joined has two slits 12 each having an open end and extending parallel to the axial direction.
The number of slits 12 need not be two as in the present embodiment. The first joint end 11 may be reduced in diameter so that the second joint end 21 mounted on the inner peripheral surface of the first joint end 11 can be crimped and fixed. Therefore, the first joint end 11
If it is determined appropriately according to the radius or the like, one, two, or more may be used. Also, the width and length of the slit 12 may be appropriately determined according to the radius of the first joint end 11 and the like. The thickness of the first pipe 10 may be appropriately determined in consideration of a radius, strength, and the like. The material of the first pipe 10 may be any suitable material that can be provided with the slit 12 and can be reduced in diameter and that can be elastically deformed.

A clamp 13 is circumferentially attached to the outer peripheral surface of the first joint end 11 of the first pipe 10. This clamp 13
Is a direction in which a part is fixed to the first joint end 11 of the first pipe 10, and the band-like portion 13 a extending along the outer peripheral surface of the first joint end 11 and both ends of the band-like portion 13 a approach each other. And an operation unit 13b that is driven in The band portion 13a may be set to a length such that the first joint end portion 11 is properly tightened. In this embodiment, the operation unit 13
b has a joint hole 13c for connecting to the stopper 22, a bolt 14a, and a nut 14b. Clamp 13
May be fixed to the first joint end 11 by an appropriate method such as an adhesive or welding. The material of the clamp 13 is the first joint end 11
What can fasten the outer peripheral surface of can be used. What is necessary is just to set the width | variety of the belt-shaped part 13 to the width which is easy to handle.

The second pipe 20 has a stopper 22 to which one end is fixed, and this stopper 22 has a joint hole 23 at the other end. Since the second joint end 21 of the second pipe 20 is mounted on the inner peripheral side of the first joint end 11, the outer radius of the second joint end 21 is equal to the outer radius of the first joint end 11. It suffices if it is slightly smaller than the radius. It is sufficient that the first joint end 11 is compressed when the diameter thereof is reduced. The thickness of the second pipe 20 may be appropriately determined in consideration of a radius, strength, and the like. The material of the second pipe 20 can be the same as the material of the first pipe 10, but is not limited thereto. What has appropriate intensity should just be used.

In this embodiment, the stopper 22 is plate-shaped, and is located between the outer end surface of the second pipe 20 in the opposite direction from the front end facing the first pipe 10 as shown in FIG. It has a gap. Without this gap, the stopper 22 hinders the second joint end 21 of the second pipe 20 from being mounted on the inner peripheral side of the first joint end 11 of the first pipe 10. is there. In this embodiment, the stopper 22 has a rectangular shape lacking a gap between the stopper 22 and the second pipe 20 when viewed from the side, but is not particularly limited to this shape and can be appropriately determined. The thickness may be appropriately determined. The stopper 22 may be fixed to the second pipe 20 by appropriate means such as welding.
The material of the stopper 22 is not particularly limited, but an appropriate material may be selected in consideration of strength, a fixing method, and the like. A metal, for example, SPHC is preferable in terms of strength and the like.

The second joint end 21 of the second pipe 20 is inserted into the inner peripheral side of the first joint end 11 of the first pipe 10,
Will be installed. Second pipe 2 to first pipe 10
When 0 is mounted, the stopper 22 is sandwiched from both sides by the operation portion 13b of the clamp 13, and the bolt 30a is inserted into the joint hole 13c and the joint hole 23 of the operation portion 13b, and the bolt 30a is The clamp 13 and the stopper 22 are connected and fixed by the nut 30b. Since the joint hole 13c of the operation portion 13b and the joint hole 23 of the stopper 22 are inserted with one bolt, the fixing is strong.

Since the clamp 13 and the stopper 22 are fixed to the first pipe 10 and the second pipe, respectively, the clamp 13 and the stopper 22 are connected and fixed to move the first pipe and the second pipe. The situation can be prevented. The clamp 13 and the stopper 22
Is connected, the operating portion 13b of the clamp 13 pulls both ends of the band portion 13a and attempts to approach each other. As a result, the belt-like portion 13a tightens the first joint end 11, and as a result, the slit of the first joint end 11 is closed correspondingly, the diameter of the first joint end 11 is reduced, and the second joint end 11 is reduced in diameter. Joint end 21
Is crimped and fixed. Since the first joint end 11 presses the second joint end 21, the first joint end 11 and the second joint end 21 are prevented from sliding.

Another embodiment will be described below.

FIG. 3 shows a second embodiment. In this embodiment, unlike the stopper of the first embodiment, there is no gap between the stopper 22 and the outer peripheral surface of the second pipe 20, and the stopper 22 is inserted into the slit 12 of the first joint end 11. . When viewed from the side, the stopper 22 has a half shape of the ellipse cut along the major axis of the ellipse, but is not particularly limited to this shape. Square, rectangular or other shapes that can be inserted into the slit 12 and can be connected to the clamp 13,
Any size is acceptable. The stopper 22 has a joint hole 23 as in the first embodiment.

As shown in FIG. 3, the clamp 13 is connected to the first joint end 1 so that the two operating portions 13b of the clamp 13 are located on both sides of the slit 12 into which the stopper 22 is inserted.
Must be fixed to 1. The rest is basically the same as in the first embodiment.

By inserting the stopper 22 into the slit 12 in this manner, the sliding of the first joint end 11 and the second joint end 21 in the circumferential direction can be surely prevented. Further, since the stopper 22 does not enter the axial direction of the first joint end portion 11 longer than the length of the slit 12, the axial movement can be prevented.

FIG. 4 shows a third embodiment. In this embodiment, the stopper 22 is inserted into the slit 12 as in the second embodiment. Therefore, in consideration of the first joint end 11 of the first pipe 10, no gap is provided between the distal end direction toward the first pipe 10 and the outer peripheral surface of the first pipe 10 in the axial direction. However, in this embodiment, one end of the stopper 22 fixed to the outer peripheral surface of the first pipe 10 has a concave shape. Therefore, the stopper 22 and the first pipe 10 constitute a joint hole 23 for joining the clamp 13 and the stopper 22. When the stopper 22 is inserted into the slit 12, the concave shape of the stopper 13 needs to be adjusted so that the joint hole 23 appears above the outer peripheral surface of the first joint end 11. The clamp 13 is a wire, and a part of the wire is fixed to the first joint portion 11 by an adhesive, welding, or the like. The rest is basically the same as in the second embodiment.

A clamp 13 made of a wire is provided around the outer periphery of the first joint end 11, and one end of the clamp 13 is inserted into a joint hole 23 formed by the stopper 22 and the first joint end 11. Into the first joint end 11 and clamp 1
3, the both ends of the clamp 3 are crossed to form a ring, the formed ring is reduced in diameter, and the first joint end 11 is tightened. 13 may be connected.

In a fourth embodiment shown in FIG. 5, a clamp 13 made of a wire is wound around the first joint end 11 as in the third embodiment, and both ends of the clamp 13 are crossed to form a ring. It is also possible to reduce the diameter of the ring so that the joint end 11 is tightened, and to connect both ends of the clamp 13 that does not form the ring to the stopper 13. In this case, in this case, the stopper 13 is inserted into the slit 12 in this embodiment, but may not be inserted into the slit 12 as in the first embodiment. The shape of the stopper 13 may be any shape as long as the clamp 13 made of a wire can be easily wound. However, clamp 13 made of wire and stopper 1
It is necessary to adjust the position of No. 2 so that the clamp 13 is wound around the first joint end portion 11 so that the diameter can be reduced. The rest is basically the same as the third embodiment.

The detachable pipe of the present invention is not limited to the above embodiment.

The detachable pipe of the present invention can be used for an exhaust muffler and a tail pipe of an industrial vehicle such as a forklift. In the case of a detachable pipe, the tail pipe can be replaced without removing the counterweight or the like. It can also be used for drainage pipes, downspouts, etc. that allow rainwater from buildings to flow down from above.

[0023]

The first joint end 11 of the first pipe 10 is
Since the distal end has at least one slit 12 which is open and extends in parallel to the axial direction, the clamp 13 tightens the outer peripheral surface of the first joint end 11 to reduce the diameter of the first joint end 11. The first joint end 11 and the second joint end 21 can be pressed and fixed.

Further, since the clamp 13 fixed to the first joint end 11 of the first pipe 10 is connected to the stopper 22 fixed to the second joint end 21 of the second pipe 20, vibration or the like is caused. The outer peripheral surface of the second joint end 21 and the inner peripheral surface of the first joint end 11 that are mounted slide, so that the first pipe 10 and the second pipe 20 move little by little, It is possible to prevent a situation in which joining is disconnected.

A clamp 13 is partially fixed to the first joint end 11 of the first pipe 10 and extends along the outer peripheral surface of the first joint end 11. In the case of the operation part 13b which is driven in the approaching direction, the fastening is ensured by the provision of the band part 13a, and the connection of the clamp 13 and the stopper 22 is ensured by the provision of the operation part 13b. Also, handling becomes easy.

Since the clamp 13 is fixed to the outer peripheral surface of the first joint end 11 of the first pipe 10, the clamp 13
Can be prevented from moving in the axial direction due to vibration or the like, and the diameter of the first joint end portion 11 cannot be reduced.

When the stopper 22 has a joint hole 23 at the other end and the clamp 13 is inserted and connected to the joint hole 23, the clamp 13 is inserted into the stopper 22. Thus, the connection between the first pipe 10 and the second pipe 20 can be strengthened.

When the stopper 22 is inserted into the slit 12 of the first joint end 11, it is possible to further prevent the first pipe 10 and the second pipe 20 from moving circumferentially and axially. it can.

[Brief description of the drawings]

FIG. 1 is a view schematically showing a first embodiment.

FIG. 2 is a side view of a stopper fixed to a second pipe according to the first embodiment.

FIG. 3 is a diagram schematically showing a second embodiment.

FIG. 4 is a view schematically showing a third embodiment.

FIG. 5 is a diagram schematically showing a fourth embodiment.

[Explanation of symbols]

 10: First pipe 11: First joint end 12: Slit 13: Clamp 13a: Strip 13b: Operation part 13c: Joint hole 14a: Bolt 14b: Nut 20: Second pipe 21: Second joint end Part 22: Stopper 23: Joint hole

Claims (4)

[Claims] 1. A first pipe having a first joint end having at least one slit having an open end and extending parallel to an axial direction, and an inner periphery of the first joint end of the first pipe. A second pipe having a second joint end detachably attached to the side, and a second joint of the second pipe fixed to the outer peripheral surface of the first joint end and attached to the first joint end. A clamp for tightening the first joint end and reducing the diameter thereof to fix the first joint end and the second joint end in a state where the joint end is mounted; And a stopper whose other end is detachably connected to the clamp. 2. A band which is partially fixed to the first joint end of the first pipe and extends along the outer peripheral surface of the first joint end, and both ends of the band. 2. The detachable pipe according to claim 1, further comprising an operation unit for driving the pipe in a direction approaching the pipe. 3. The stopper has a joint hole at the other end,
The said clamp is penetrated and connected to this joint hole.
The detachable pipe according to the description. 4. The detachable pipe according to claim 1, wherein said stopper is inserted into one of said slits.