JP3536132B2 - Protection tube for corrugated pipe for electric wire insertion - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection tube used for protecting a ground portion of a corrugated tube. More specifically, the present invention relates to a protection tube through which a wire or the like is inserted. The present invention relates to a protection cylinder for protecting a rising portion between an underground portion of a wire insertion corrugated tube and a wiring box on the ground for protecting the ground portion. 2. Description of the Related Art Conventionally, a rising above ground portion of an electric wire insertion corrugated pipe of this type, that is, a rising above ground portion between an underground buried portion and a wiring box on the ground, is particularly protected by the corrugated pipe as it is. Was not provided. [0003] Therefore, the rising ground portion is directly damaged by external impact, or is exposed to direct sunlight, wind and rain, and is more likely to be damaged or deteriorated than the underground buried portion. There was a problem that. [0004] On the other hand, in this type of electric wire insertion corrugated pipe, if the rising ground portion between the buried portion in the ground and the wiring box on the ground at the time of laying is short, the piping becomes difficult or impossible. Due to dimensional problems, there is a problem that the pipe is not necessarily set up vertically and may be bent, and because it is a corrugated pipe, dust easily accumulates and it is difficult to keep the appearance beautiful. Was also possessed. Accordingly, an object of the present invention is to solve these problems of the conventional electric wire insertion corrugated tube and to determine whether the corrugated tube is a newly laid corrugated tube or an existing corrugated tube. Regardless of the protection tube, a rising portion of the corrugated tube can be protected from the outside to prevent breakage and deterioration, to withstand long-term use, and at the same time not to impair the aesthetic appearance. It is what we are going to offer. [0006] The configuration of the present invention for achieving the object, according to an aspect of, referring to the sign of the diagram corresponding to the embodiment, the wire insertion corrugated tube for protecting cylinder according to the present invention ,
It comprises a straight tubular body 11 cut along the axial direction, and male and female connectors 2 and 3 fixed along the cut surface, and the structure of the female connector 2 is changed to the male connector 3 side. And a wedge engaging projection 23 formed in an opening 24 of the male connector 3 so that the structure of the male connector 3 projects toward the female connector 2. Portion 31 and a wedge body 33 formed at the tip thereof.
Is formed to be larger than the thickness of the protruding portion 31 and larger than the width of the opening 24 in the thickness direction , and one end is fixed to the wiring box, and the other end is grounded.
This is a structure embedded in the. The wedge body 33 may have an arrow shape or an arc shape, and may have various other shapes. In other words, the wedge body 33 has a thick portion that engages with the wedge engaging projection 23 to perform a retaining function. What is necessary is just to be formed in the shape which has. Further, the wedge housing 21 may be of a size that can accommodate the wedge 33, and the wedge 3
3 may have an allowance for sliding a predetermined length. Further, the cylinder body 11 and the male and female connector 2,
The connection with the connecting member 3 may be a contacting structure other than the sandwiching and sandwiching structure, as long as it is securely fixed to each other by an adhesive, a caulking tack, welding or any other general connecting means. Not specified. The protective tube 1 of the present invention has the above-described structure, so that the lower end 1a of the protective tube 1 is put into the ground during use, and the wire insertion corrugated tube H is Wrap around the outer periphery of the rising ground part Ha,
The wedge 33 may be inserted and fitted into the wedge accommodating portion 21 by abutting the opening 24 in 3 and the wedge 33 and pressing the cylinder body 11 from the circumferential direction. In this way, the lower end 1a is buried in the ground to stabilize, thereby surrounding and protecting the rising ground portion Ha of the corrugated tube H. Therefore, the protective tube 1 of the present invention can withstand the prolonged use without damaging the rising ground portion Ha of the corrugated tube H, which is severely affected by external impacts and has a beautiful appearance. be able to. Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are views showing a first embodiment of the present invention. FIG. 1 shows a partially used state of use, and FIGS. 2 and 3 are enlarged views showing a structure of a main part. FIG. 4 is a view showing the entire shape in a short state. The corrugated tube protection cylinder 1 shown in this embodiment is composed of a cylinder main body 11 and male and female coupling bodies 2 and 3, and the cylinder main body 11 has a wall thickness of about 2 to 3 mm. It is a cylindrical body having a cut opening formed by cutting a part of a straight pipe of a predetermined length formed of a semi-rigid synthetic resin material linearly along the axial direction. As shown in FIG. 2, the female connector 2 has two side walls 26, 26 having two parallel side walls 26 on one end side (left side in the figure) and a U-shape opening on the outside. , 26 are formed into a U-shape having two parallel side walls 25, 25 at the other end (right side in the figure) and open outward. The opening 24 has wedge engaging projections 23, 23 projecting toward the center line, and a space serving as the wedge accommodating portion 21 is provided between the engaging projections 23, 23 and both side walls 25, 25. Is a semi-rigid synthetic resin strip having a structure having: The male connector 3 is also a semi-rigid synthetic resin band like the female connector 2, and has a cross-sectional shape of
One end (the left side in the figure) has a single flat protruding portion 31 protruding outward, and has a triangular wedge body 33 with its apex facing outward at the tip thereof. Has two side walls 34, 34 parallel to one end side (left side) of the female connector 2 in the same manner as above, and has a U-shape opening on the outside and has a cylindrical main body connection space between the side walls 34, 34. 32.
The thickness of the bottom portion of the triangle in the thickness direction (vertical direction in the figure) of the wedge body 33 is made larger than the thickness of the projection 31 and the thickness direction of the opening 24 in the female connector 2 ( This is a structure formed to be larger than the width in the vertical direction. The cylindrical main body connecting spaces 22 and 32 of the male and female connecting bodies 2 and 3 respectively have cylindrical main bodies 11 and 12.
Cut ends 12 and 13 are respectively inserted and bonded and fixed using adhesives 4 and 4 to form an integrated structure. As described in the above-mentioned section of the operation, and as shown in FIG. 2, when the above-mentioned structure is used, the wire insertion corrugated tube H is bent from the underground buried portion Hb to the bent portion. After wrapping around the outer periphery of the ground portion Ha rising from the ground GL to the ground via Hc, the opening 24 in the male and female coupling bodies 2 and 3 and the wedge body 33 abut each other, and the cylinder body 11
Is pressed from the circumferential direction to move the wedge body 33 in the direction of arrow A in the same figure, and further pressed, the wedge body 33 is inserted and fitted into the wedge accommodating portion 21 as shown in FIG. It is a body. At this time, as shown in FIG. 1, a terminal cap CA is placed on the upper end 1b and the lower end of the wiring box BX is brought into contact with the lower surface of the wiring box BX. And secured by a connector C fixed to the wiring box BX with a locking nut N and secured by embedding the lower end 1a in the ground, so as to surround and protect the rising ground portion Ha of the corrugated tube H. To B in the drawing is a bushing fitted to the upper end of the connector C inside the wiring box BX. If the both side walls 25, 25 constituting the wedge accommodating portion 21 in the female connector 2 shown in the above embodiment are formed long as shown in the figure, the opening 24 can be easily pushed open and the wedge can be opened. There is an advantage that the body 33 can be easily inserted. Further, if the protruding portion 31 of the male connector 3 is formed to be longer as shown in the figure, the fitting with the terminal cap CA shown in FIG. There is an advantage that is easy. The embodiment shown in FIG. 5 and FIG.
The protrusion 31 of the male connector 3 shown in the embodiment is formed with a plurality of protrusions 35 different from the wedge body 33 at the tip. Any one of them can be selected to be engaged with the wedge engaging projection 23. The embodiment shown in FIGS. 7 and 8 shows the projection 31 in the male connector 3.
Is short enough to be engaged with the wedge engaging projection 23, so that the relative movement amount of the male and female connecting members 2, 3 can be reduced. The cylinder body 11 and the connecting members 2 and 3 according to the present invention.
As a material for the material, a material excellent in impact resistance and weather resistance such as polyvinyl chloride (PVC) and polyethylene (PE) is suitable, but is not particularly limited. Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, and has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object of the present invention and can be appropriately modified and implemented within a range having the following effects. As is clear from the above description, the protection tube according to the present invention is fixed to a straight tube body cut along the axial direction and along the cut surface. A male connector having a wedge receiving portion for opening the structure of the female connector toward the male connector and a wedge engaging projection formed at the opening thereof. Having a projection projecting toward the female connector side and a wedge formed at the tip thereof, wherein the thickness of the wedge in the thickness direction is larger than the thickness of the projection, The opening is formed to be larger than the width in the thickness direction of the opening, and in use, a part of the lower end is put into the ground, and the electric wire insertion corrugated tube is wound around the outer periphery of the rising portion of the ground. , The abutment of the opening of the male and female connector and the wedge Since the wedge body is inserted and fitted into the wedge housing by pressing it from the circumferential direction, the upper end is stabilized using the wiring box on the ground, and the lower end is embedded in the ground to stabilize. As a result, it is possible to expect a remarkable effect that the rising portion of the corrugated tube is surrounded and protected from external impact and early aging, and can be used for many months. Further, since the protective cylinder of the present invention is formed such that the cylinder main body and the male and female connecting members are formed as separate bodies and connected and fixedly integrated, the connecting between the cylindrical main body and the male and female members is performed. The body and the body can be manufactured with the optimum hardness respectively.For example, the cylinder body is made to be somewhat flexible, and the connection body is made to have a higher hardness than the connection body, so that the connection bodies are surely fitted to each other. In addition, it is possible to manufacture a protection tube having a large diameter and a small diameter by changing the cutting width of the longitudinally cut portion by making the material tube for forming the tube main body to have a constant diameter. Has a significant manufacturing advantage. Furthermore, the protective tube of the present invention conceals an ugly bent posture of the electric wire insertion corrugated tube and an ugly state in which dust is accumulated due to the corrugated tube having an uneven shape, and maintains a beautiful appearance. It also has the effect of being able to do so.

[Brief description of the drawings] FIG. 1 is a front view showing a use state in which a part is broken. FIG. 2 is a plan view showing a separated state of a main part. FIG. 3 is a plan view showing a connection state of main parts. FIG. 4 is a perspective view showing the overall shape. FIG. 5 is a plan view showing a separated state of a main part of another embodiment. FIG. 6 is an exemplary plan view showing a connection state of main parts of the embodiment. FIG. 7 is a plan view showing a separated state of a main part of still another embodiment. FIG. 8 is a plan view showing a connection state of main parts of the embodiment. [Explanation of symbols] (1) Protection tube (2) Female connector (3) Male connector (11) Tube body (21) Wedge storage (23) Wedge engaging part (24) Opening (31) Projection (33) Wedge

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Toshio Ishiyama               3-3 Ishimochi-cho, Sagae City, Yamagata Prefecture Co., Ltd.               Yurtec Sagae Office                (56) References Japanese Utility Model Showa 49-72999 (JP, U)                 Shokai Sho 57-146720 (JP, U)                 Shokai Sho 57-1828131 (JP, U)                 Actual opening 1988-194524 (JP, U)                 Jitsuhei 5-1937 (JP, Y2)

Claims (1)

(57) [Claims 1] A straight tubular body (11) cut along the axial direction, and male and female connecting bodies (2), (7) fixed along the cut surface. 3), and the female connector (2) is a male connector (3)
It has a wedge receiving portion (21) that opens toward the side and a wedge engaging projection (23) formed in the opening (24), and the male connector (3) is a female connector (2). A projection (31) protruding toward the side and a wedge (33) formed at the tip thereof, and the thickness of the wedge (33) in the thickness direction is reduced by the thickness of the projection (31). It is formed larger than the thickness, and larger than the width in the thickness direction of the opening (24) ,
And fix one end to the wiring box and fill the other end to the ground
The protection tube for the corrugated pipe through which the wire is inserted .