JPH0735888U - Pipe disconnection prevention fitting - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to prevent twisting of multiple metal fittings when installing on a pipe joint, and to easily set an annular shape at the desired position to improve workability. (EN) Provided is a pipe detachment prevention metal fitting that is free from the risk of the plurality of metal fitting bodies being detached during transportation or construction on a joint. [Structure] A flange 2 is provided at a split end of a pipe fitting metal fitting body 1 divided into a plurality of pieces in the axial direction, and the flanges 2 of the flanges 2 facing each other for inserting a fastener are left to face each other. The connecting rod 7 is inserted through the flange 2, the flanges 2 are engaged with the T-shaped heads 9 at both ends of the connecting rod 7, respectively, and the rubber holding body 12 for holding the distance between the flanges 2 is attached to the rod portion 8 of the connecting rod 7.
Is fitted in the central constricted portion 10 and interposed between the flanges 2, and a notch 4 provided along the connecting rod 7 on the outside of the flange 2 is protruded from the rod portion 8 of the connecting rod 7. A pipe detachment preventing metal fitting, characterized in that a rotation preventing projection (11) is fitted and a constricted portion (10) of a rod portion (8) of the connecting rod (7) can be inserted into a cutout portion (4) of the flange (2).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a split type pipe separation preventing metal fitting for a joint portion of a ductile cast iron pipe or the like forming a water channel or the like.

[0002]

[Prior art]

 Conventionally, for example, Japanese Utility Model Publication No. 4-7431 exists as a split type pipe detachment prevention fitting for a joint portion of a pipe. However, since the above-mentioned pipe disengagement prevention fitting is an engagement method that engages the female locking portion at one end of one half-shaped member and the male locking portion of the other half-shaped member, it is not possible to use the pipe at the construction site. When fitted in the joint part, both half-divided members were liable to be twisted, which made it difficult to set an annular shape at the intended position, and there was a problem in workability.

[0003]

[Problems to be solved by the device]

 In view of this, the present invention prevents twisting of a plurality of metal fitting bodies during construction of a joint part of a pipe, and can easily set an annular shape at a desired position to improve workability. The purpose of the present invention is to provide a pipe detachment prevention metal fitting that does not have the risk of detachment of a plurality of metal fitting bodies during construction of a pipe part.

[0004]

[Means for Solving the Problems]

 That is, according to the present invention, a flange is provided at a split end of a pipe fitting metal body that is divided into a plurality of pieces in the axial direction, and one of these flanges is opposed to the other, leaving an opposed flange for inserting a fastener. Insert the connecting rod into the flange, engage the above-mentioned flanges with the T-shaped heads at both ends of the connecting rod, and attach the rubber holders for maintaining the flange spacing to the constricted part at the center of the connecting rod. It fits and intervenes between the flanges, and the detents protruding from the rod portion of the connecting rod are fitted to the notches provided along the connecting rod on the outside of the flange to fit the connecting rod. A gist of a pipe detachment preventing metal fitting is characterized in that a constricted portion of a rod portion can be inserted into a cutout portion of the flange.

[0005]

[Action]

 In such a pipe disengagement prevention metal fitting, when it is installed on the joint part of the pipe, it is necessary to prevent the elastic force of the holding body of the connecting rod between the other flanges between the opposing fastener insertion flanges of the metal fitting body. The pipe joints of the pipes, and then the fasteners are fastened between the flanges for inserting the fasteners of the metal fitting body. Set the desired position of the department. In addition, even if multiple metal fittings are likely to be twisted during expansion between the flanges of the metal fittings during the above-mentioned construction or during transportation, they may be inserted through the detents of the connecting rod that fit into the notches of the metal fittings. The twisting of the metal fittings adjacent to each other is prevented.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1-1 is a fitting body for fitting a pipe, which is sized to fit a joint portion of a pipe, and is divided into a plurality (three in the figure) in a substantially equal direction in the axial direction. Each of the divided ends of 1 is provided with flanges 2 to 2 protruding outward, and each of the flanges 2 to 2 is provided with an insertion hole 3 to 3 directed in the opposite direction, and at the outer end of each of the flanges 2 to 2. Are provided with narrow notches 4 to 4 communicating with the insertion hole 3 along the insertion hole 3, and piece accommodating portions 5 to 5 are formed on the inner surfaces of the central portions of the metal fitting bodies 1 to 1, respectively. The fitting parts 6 to 6 project from the fitting main bodies 1 to 1 behind the fitting parts 5 to 5.

Reference numerals 7 and 7 denote connecting rods that are inserted through the through holes 3 and 3 of the two opposing flanges 2 and 2 of the metal fitting bodies 1 to 1, respectively. Shaped heads 9 and 9 are formed, and a narrow constricted portion 10 is provided in the center of the rod portion 8 along the T-shaped head portion 9. The rod portion 8 is formed with anti-rotation projections 11 and 11, and the projections 11 and 11 of the connecting rod are respectively fitted into the notches 4 and 4 of the flange so that the constricted portion 10 is oriented in the front-rear direction. , The T-shaped heads 9, 9 of the connecting rods are engaged with the flanges 2, 2. Reference numerals 12 and 12 denote annular rubber holders inserted into the constricted portions 10 and 10 of the connecting rods, respectively, and cut surfaces 13 are formed in the axial direction of the holder 10, and both ends of the holder 12 are It is in contact with the facing surfaces of the flanges 2, 2.

Reference numeral 14 denotes a T-head bolt inserted through the insertion holes 3 and 3 of the remaining flanges 2 and 2 of the remaining metal fitting body 1 and 1, and the nut 15 is screwed to connect the flanges 2 and 2. is doing. Numerals 16 to 16 are pipe withdrawal preventing pieces housed in the piece accommodating portions 5 to 5 of each metal fitting body. The piece 16 is prevented from coming off by coming into contact with the rear wall of the piece storage portion 5.

In such a pipe disengagement prevention metal fitting, the bolts 14 and nuts 15 are stacked in the annular state mounted as described above and are used for transportation and storage, and are attached to the T-shaped joint portion of the pipe. At the time of working, the bolt 14 and the nut 15 are once removed, and the flanges 2 and 2 thus removed are expanded against the elasticity of the holding bodies 12 and 12, and the insertion opening 21 of the T-shaped joint of the pipe is inserted. While fitting the metal fitting bodies 1 to 1, the engaging portions 6 to 6 of the metal fitting body are engaged with the collar portion 23 of the receiving port 22 of the T-shaped joint portion, and the bolts 14 and nuts 15 are tightened in the above-described state. The pieces 16 to 16 supported by the metal fitting bodies 1 to 1 are fastened to the insertion opening 21. When the flanges 2 and 2 are expanded and attached to the T-shaped joint portion during this construction, the protrusions 7 to 7 of the connecting rod are fitted into the notches 4 to 4 of the metal fitting body, so that each metal fitting body 1 It is possible to prevent twisting between the first and second parts, so that the desired annular state is maintained in the installed state, and the engagement of the locking parts 6 to 6 with the collar part 23 is maintained. Further, in this construction state, the constricted portion 10 of the connecting rod, which is relatively thin, is protected by the holding body 12.

Next, when the metal fitting bodies 1 to 1 are connected by the connecting rods 7 and 7 as described above, the metal fitting body 1 is rotated 90 degrees after the cutout portion 4 of the metal fitting body is passed through the constricted portion 10 of the connecting rod. After that, the metal fitting body 1 is displaced to the T-shaped head 9 of the connecting rod, and the notch 4 of the metal fitting body is fitted into the projection 11 of the connecting rod. After that, the other metal fitting bodies 1 are similarly fitted into the connecting rods 7. Then, the cut surface 13 of the holding body 12 is pushed open against the elasticity of the holding body 12 and the constricted portion 10 of the connecting rod is passed through, the holding body 12 is fitted into the constricted portion 10, and the above-mentioned assembled state is obtained.

In addition to the above example, in order to prevent the tube from coming off, the piece 16 may be pressed by a holding bolt screwed into the metal fitting body, or the piece 16 may be omitted to insert the holding bolt into the insertion port 21. There is no problem with various publicly known means for directly pressing the fitting body 1 or directly fastening the metal fitting body 1 to the insertion opening 21.

[0012]

[Effect of device]

 As described above, in the pipe detachment prevention metal fitting of the present invention, it is possible to prevent the plurality of metal fitting main bodies from twisting due to the anti-rotation effect of the projection of the connecting rod when the pipe fitting is installed. The position can be easily set to an annular shape, and the multiple metal fitting bodies can be prevented from coming off by the connecting rod and the holding body during transportation or during processing on the joint, and the holding body can be used to compare the connecting rods. It can contribute to the corrosion prevention of the thin constriction, and by connecting the remaining flanges of the metal fittings body with the tightening tool of the bolts and nuts, the multiple metal fittings body can maintain the annular shape and stacking during transportation It will be easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is an enlarged view of arrow P in FIG.

FIG. 3 is a partial side view of the above example.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is an enlarged front view of the connecting rod of the above example.

FIG. 6 is an enlarged plan view of the same connecting rod.

7 is a cross-sectional view taken along the line BB of FIG.

FIG. 8 is an enlarged front view of the holding body of the above example.

FIG. 9 is an enlarged side view of the same holding body.

FIG. 10 is an enlarged bottom view of the same holding body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal fitting body 2 Flange 4 Notch portion 7 Connecting rod 8 Rod portion 9 T-shaped head portion 10 Constriction portion 11 Protrusion 12 Holding body

Claims (1)

[Scope of utility model registration request] 1. A flange is provided on a split end of a pipe fitting metal body which is divided into a plurality of pieces in the axial direction, and among the flanges, the opposing flanges for inserting fasteners are left and the other opposing flanges are provided. The connecting rod is inserted, the above-mentioned flanges are engaged with the T-shaped heads at both ends of the connecting rod, and the flange-holding rubber holding body is fitted on the central constricted portion of the rod portion of the connecting rod, and the flange is formed. An interlocking protrusion protruding from the rod portion of the connecting rod is fitted into a notch portion provided along the connecting rod on the outside of the flange, and the constricted portion of the rod portion of the connecting rod is formed. A pipe disengagement prevention fitting, which can be inserted into the cutout portion of the flange.