JPH0518490A - Rubber cylinder fixing ring for connection of manhole branch pipe - Google Patents

Abstract

PURPOSE:To fix a rubber cylinder for connection of manhole branch pipe to a window provided in the wall of manhole easily and certainly using a simple tool. CONSTITUTION:An operational member 2 is arranged between a plurality of arc-shaped body pieces 1, 1 having a grooved section, and a bolt rod 11 installed projectively at the central member 7 of the operational member 2 is installed between the ends 11a, 11a of the body pieces 1, 1, and a nut 13 is fitted on the tip 11a of this bolt rod 11 with a resilient pressure piece 12 interposed. A foremost piece 16 fixed to the tip of an inclining member 15 of this pressure piece 12 is detained with a pressure receiving piece 6 provided on each body piece 1. When the nut 3 is driven fast, the pressure piece 12 is pressed, and as a result, the body pieces 1, 1 are opened separate from each other through the inclining member 15. Thereby a rubber cylinder for connection of a branch pipe situated around the body pieces 1 and operational member 2 is put in pressure contact with the inner edge of a window provided in the wall of a manhole, and thus the rubber cylinder secured to the window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION Conventionally, in order to connect a branch pipe to a manhole, a window is provided on the wall of the manhole, one end of a concrete branch pipe is opposed to the window, and the peripheral surface of the facing portion is cemented. Although it was hardened and connected and fixed, according to this method, the connection part may be cracked due to the pressure of the ground subsidence and water leakage may occur, leading to a road collapse accident. As a method that can cope with misalignment between the manhole and the branch pipe due to subsidence and various branch angles, a rubber tube is interposed between the manhole and the branch tube, and the base of the rubber tube is fixed to the window, and the window (wall surface)
A flexible connection method is used in which a branch pipe is connected to the tip of a more protruding rubber cylinder.

The present invention relates to a fixing ring of a rubber tube for connecting a branch pipe of a manhole, which is used to press and fix the base of the rubber tube against an edge of a window for hermetically fixing.

[0003]

2. Description of the Related Art Between the ends of a plurality of arc-shaped main body pieces, operating members formed by connecting leading end pieces to the ends of both inclined members of a pressing piece formed in a mountain shape are respectively interposed. A fixing ring is formed by fixing the tip end pieces to the tabs of the main body piece respectively, and when the rubber cylinder is press-contacted and fixed to the window edge of the manhole, the pressing piece that is in a standing state with respect to the main body piece is There is a structure in which the rubber cylinder is pressed against the edge of the window of the manhole on the outer peripheral surface of the fixing ring by expanding the outer diameter of the fixing ring configured as described above by flattening it with a mechanical force such as hydraulic pressure. ..

[0004]

In the above-mentioned conventional example, a step is formed between the outer peripheral surface of the main body piece pressing the rubber tube and the outer peripheral surface of the operating member (the outer peripheral surface of the operating material portion is retracted from the outer peripheral surface of the main portion piece. Therefore, between the ends of the main body part (operating material part), the rubber cylinder is not pressed sufficiently against the edge of the manhole window, causing water leakage and eventually causing ground subsidence. Was there.

The present invention has been devised for the purpose of providing a fixing ring which eliminates the drawbacks of the prior art.

[0006]

Means for Solving the Problems A bolt protruding from an operation board is interposed between respective ends of a plurality of arcuate main pieces, and the elastic pressing piece is attached to the bolt by penetrating the bolt. , A tightening nut is screwed onto the tip of the bolt from this pressing piece, and a pressure receiving piece is provided at the end of the main piece slidably superposed on the operation board. The tip pieces provided at both ends are locked.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of a rubber tube fixing ring for connecting a branch pipe of a manhole according to the present invention. The fixing ring A of the embodiment is composed of three main pieces 1, 1, 1 and the main piece. 1,
It is configured by assembling three operation members 2, 2 interposed between the end portions 1a, 1a of 1, 1.

The main piece 1 has an arc-shaped cross-section groove composed of a central piece 3 along the longitudinal direction and side pieces 4 and 4 formed by bending both sides of the central piece 3 along the longitudinal direction. Consists of a shape,
In the central piece 3, the end portions 1a, 1a of the main body piece 1 are left, and a groove 5 is formed by projecting outward from the end portion 1a by the plate thickness of the central piece 3 to form the end portions 1a, 1a. 1a is formed by projecting pressure receiving pieces 6 and 6 so as to cut and raise a part of the central piece 3.

The operating member 2 is composed of a central piece 7 and side pieces 8, 8 having an inner width capable of engaging the main piece 1 by bending both sides of the central piece 7 in the longitudinal direction. The central part piece step part 3 located at the end of the concave part 5 of the main body part piece 3 by cutting out the front end and the rear end of the central part piece 7 of the slightly arcuate operation board 9 in a U shape.
The engaging notch 10a is provided, and a bolt rod 11 is provided at the center of the central piece 7 so that the bolt rod 11 can be attached to the bolt rod 11.
1, an elastic pressing piece 12 is assembled, and a tightening nut 13 is screwed to the tip 11a of the bolt rod 11 projecting from the pressing piece 12.

Further, the pressing piece 12 is such that the inclined piece pieces 15, 15 are continuously provided on both sides of the central piece 14 through which the bolt rod 11 penetrates, and the tip end piece 1 is attached to the tip of the inclined piece pieces 15, 15.
6, 16 are connected in series.

Therefore, the end portions 1a, 1a of the main body pieces 1, 1 are
With the operating member 2 interposed therebetween, the bolt rod 11 projecting from the operating substrate 9 of the operating member 2 is located between the end portions 1a, 1a of the main pieces 1, 1 superposed on the operating substrate 9, The tip piece 16 of the pressing piece 12 assembled to the bolt rod 11 is engaged with the through hole 6a formed in the pressure receiving piece 6, and the main body piece 1 and the operating member 2 are assembled together to fix the embodiment. This constitutes the ring A.

In FIG. 4, reference numeral 80 designates a manhole,
81 is a window 81 provided on the wall surface 80a of the manhole 80
Then, when the base Ba of the rubber cylinder B is engaged with the window 81, the fixing ring A is engaged with the engagement groove 18 recessed in the inner surface of the base Ba, and the tightening nut 13 is operated, the pressing piece 12 is pressed. Is pressed by the central piece 14, the inclined piece 15 of the pressing piece 12 presses the pressure receiving piece 6, and as a result, the space between the ends 1a, 1a of the main piece 1 expands and the outside of the fixing ring A The diameter is expanded, and the base Ba of the rubber cylinder B is opened by the window 8 by this expansion.
The rubber cylinder B is fixed to the manhole 80 by being pressed by the inner edge of 1. At this time, the central piece 7 of the operation board 9
If the cutting depth of the engaging notch 10 provided in the main body 1 is set to be equal to or more than the moving amount of the main body 1 moving on the operation board 9 by operating the tightening nut 13, the operation with the outer peripheral surface of the main body is performed. There is no difference in level with the outer peripheral surface of the material, and the embodiment is equal to or more than the same.

Reference numeral 18 shows a branch pipe, which is a branch pipe C.
Are engaged with and connected to the tip Bb of the rubber tube B.

[0014]

Since the present invention has the above-mentioned structure, the rubber cylinder is closely attached over the entire circumference of the fixed ring portion, and therefore there is no risk of water leakage. In addition, when installing it, the tightening work can be done with only one wrench, so no special tools such as a hydraulic device are required, and in terms of transportation, the fixing ring can be easily disassembled so that the packing form is compact and practical. There is a great thing.

[Brief description of drawings]

FIG. 1 is a plan view of a main part.

FIG. 2 is a sectional view taken along line 1a-a of FIG.

FIG. 3 is a sectional view taken along line 2b-b of FIG.

FIG. 4 is a cross-sectional view showing a usage state.

FIG. 5 is a plan view.

[Explanation of symbols]

 1 Main piece 6 Pressure receiving piece 9 Operation board 11 Bolt rod 12 Pressing piece 16 Tip piece

Claims (1)

Claim: What is claimed is: 1. A bolt projecting from the operation board is interposed between the respective ends of a plurality of arc-shaped main pieces, and the elastic pressing piece is attached to the bolt by penetrating the bolt. Assembling, screwing a tightening nut to the tip of the bolt from this pressing piece, and providing a pressure receiving piece at the end of the main piece slidably superposed on the operation board, and pressing the pressure receiving piece to the pressure receiving piece. A fixing ring for a rubber tube for connecting a branch pipe of a manhole, in which the tip pieces provided at both ends of the piece are locked.