JP2002363918A - Drain piping device of bridge beam floor slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the thicknesses of floor slabs to vary from design to design to cope with several constant lengths in a pipe for draining through the floor slab and pavement part of a bridge beam. SOLUTION: This piping device is formed in a double pipe structure formed of an external fixed pipe 1 fitted to a floor slab portion and a movable pipe 2 inserted into the pipe 1. When the movable pipe 2 comprising several constant lengths is inserted into the fixed pipe 1, the length thereof is set and fixed so that the overall through-length of the pipe can be set arbitrarily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a drainage piping system for a bridge slab.

[0002]

2. Description of the Related Art Drainage pipes for bridge slabs have been manufactured or constructed in various pipe lengths according to the thickness of the slab, and a great deal of labor is required for the fabrication and construction. . In some cases, the pipe length is different from the thickness of the floor slab, which increases the number of parts and labor.

[0003]

The problem to be solved by the present invention is to make it possible to cope with the thickness of each slab, which varies depending on the bridge design, by using several types of drainage pipes having a fixed pipe length.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a fixed pipe and a movable pipe are provided so that the penetration length of a drainage pipe can be arbitrarily set in accordance with the floor slab thickness which varies with each bridge. With a double structure. That is, the length of the movable pipe inserted into the fixed pipe is adjusted and fixed according to the floor slab penetration length. This eliminates the need to manufacture drainage pipe lengths to specific lengths in advance according to the thickness of each bridge slab, making it possible to handle all types of slabs with several types of pipes. .

According to the present invention, the fixed pipe and the movable pipe in the double pipe structure are fixed to each other by attaching a ring made of an elastic material such as rubber to the outer peripheral side of the movable pipe and connecting the ring to the movable pipe. The ring is deformed so as to extend in the pipe diameter direction by a fixed joint part, and the fixed pipe and the movable pipe are fixed by utilizing the frictional force. Conversely, if the extension of the link is returned to its original state, a gap is created between the ring and the fixed pipe and the fixed joint connected to it, and the movable pipe can be moved, and the length of the entire drainage pipe can be set again. Become.

The above-mentioned ring fixes both fixed and movable pipes when extended by a fixed joint, but at the same time fills the gap between the movable pipe inside and the fixed pipe outside by the frictional force. It has a sealing function against leakage of drainage.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a specific embodiment of the present invention will be described below. The piping device shown in FIG.
It is used for floor slab penetration lengths up to 20 mm. In this case, a fixed joint 3 for fixing the movable pipe 2 to the fixed pipe 1 is used. A male screw is cut on the outer periphery of the fixed pipe, and a female screw is cut on the inner periphery of the fixed joint.
A rubber ring 4 having a circular cross section is mounted in the gap in the knurl. An adjustment scale is provided on the outer periphery of the movable pipe to check the insertion length.

FIG. 2 shows a state in which the movable pipe 2 is moved in the axial direction and positioned at a previously designed length. In this state, since the fixed joint 1 is not tightened, there is a gap between the ring 4 and the movable pipe 2, and the movable pipe can be moved without difficulty.

FIG. 3 shows a state where the fixed pipe 1 and the movable pipe 2 are fixed. When the fixed joint 3 is rotated and tightened, the ring 4 is finally pushed and deformed, and the movable pipe and the fixed joint are restrained by frictional force, so that the overall dimensions are fixed. In this state, the drainage passing through the movable pipe is sealed by the constrained ring and does not leak outside.

[0010]

The drainage pipes for bridge floor slabs heretofore have been manufactured with various pipe lengths, the lengths of which are adjusted according to the thickness of the floor slab, and a great deal of labor is required for the production and construction.
In some cases, the pipe length is different from the thickness of the floor slab, which increases the number of parts and labor. The present invention makes it possible to cope with various slab thicknesses that vary depending on the bridge design by using several types of pipes having a constant pipe length.

[Brief description of the drawings]

FIG. 1 is a diagram of a drainage piping device for a floor slab according to the present invention.

FIG. 2 is an explanatory view of a piping device in a movable state of the present invention.

FIG. 3 is an explanatory view of a fixed piping device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 fixed pipe 2 movable pipe 3 fixed joint 4 ring 5 flexible joint 6 screw

Claims (2)

[Claims] 1. A pipe for draining through a floor slab and a pavement portion of a bridge, wherein an outer fixed pipe (hereinafter referred to as a fixed pipe) attached to the slab and a movable pipe (hereinafter referred to as a movable pipe) inserted therein. When inserting several types of movable pipes into a fixed pipe, the insertion length can be set and fixed, so that the entire penetration length can be arbitrarily set and fixed. Drainage piping system for bridge decks with heavy pipe structure. 2. A fixed ring and a movable pipe are provided with a ring made of an elastic material at a fitting portion thereof, and the two pipes can be fixed and movable arbitrarily by utilizing a frictional force due to deformation thereof.
2. A seal function in addition to the above.
A drainage pipe device according to item 1.