JPH10252027A - Terminal cap attaching structure of pipe covered with synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal cap attaching structure which does not protrude from a synthetic-resin-covered pipe and can be added at a construction site, for use with the supports of a fence, etc. SOLUTION: A connector 2 comprises a cylindrical part 21, having an outside diameter almost equal to the bore of a pipe 1 and having an engaging part 23 formed on its interior wall, and a flange 22 formed at one end of the cylindrical part 21, with the outside diameter of the flange 22 almost equal to that of the pipe, and a terminal cap 3 comprises a lid 32 almost equal in outside diameter to the pipe 1 and a locking part 31 formed on the back of the lid 32 in such a way as to be locked with the engaging part of the connector 2. The cylindrical part 21 of the connector 2 is inserted into the end of the pipe 1, the flange 22 is made to abut to and attached to the end face of the pipe 1, a synthetic resin layer covering the pipe 1 is projected from the connector 2 at the end of the pipe 1, and the locking part 31 of the terminal cap 3 is inserted into the connector 2 and locked to the engaging part 23. Therefore, the lid 32 has a smaller diameter than the synthetic resin-covered pipe and so does not protrude.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a terminal cap of a synthetic resin coating tube used for a pillar of a fence or the like.

[0002]

2. Description of the Related Art Conventionally, an end cap mounting structure of a synthetic resin cladding tube is an overcap type cap or tube body in which an end portion of the synthetic resin cladding tube is covered with a cap having a diameter larger than the outer diameter of the synthetic resin cladding tube. An inner fitting cap is inserted into an end portion of a synthetic resin coated tube coated with a synthetic resin, and the inner fitting cap is welded to a synthetic resin layer coated on the tube body.

[0003]

However, in the above-mentioned cap mounting structure of the overcap type, since a cap larger than the outer diameter of the synthetic resin coating tube is mounted, the terminal portion protrudes, and depending on the place where it is used. Had a problem of getting caught in the human body and clothes, and was not preferable in terms of scenery. Also, in the case where the inner fitting cap is welded to the synthetic resin layer coated on the pipe, the cap is attached to the end of the synthetic resin coated pipe at the time of construction, so from the opening end of the synthetic resin coated pipe Construction was not possible.

Accordingly, the present inventor has conducted intensive studies in view of the drawbacks of the prior art, and as a result, has provided an end cap attaching structure for a synthetic resin cladding tube which can be retrofitted at a construction site without protruding from the synthetic resin cladding tube.

[0005]

According to the first aspect of the present invention, there is provided a synthetic resin-coated tube having a terminal cap attached thereto, wherein the outer wall of the tube is coated with a synthetic resin and an end of the synthetic resin-coated tube. In a terminal cap attachment structure of a synthetic resin cladding tube comprising a connecting member attached to the portion and a terminal cap fitted and attached to the connecting member, the outer diameter of the connecting member is substantially the same as the inner diameter of the tube. A cylindrical portion having an engagement portion formed on the inner wall thereof, and an outer diameter formed at one end of the cylindrical portion is formed of a flange-like body having substantially the same size as the outer diameter of the tubular body. A lid having substantially the same diameter as the outer diameter of the tubular body, and a locking portion formed on the back surface of the lid so as to be locked to the engaging portion of the connecting material, and the connecting material is provided at the end of the tubular body. The cylindrical portion is inserted and the flange is abutted and attached to the end surface of the tube, and the synthetic resin layer covering the tube protrudes from the connecting material at the end of the tube. The locking portion of the terminal cap is inserted into this connecting member and is locked and attached to the engaging portion, so that the lid does not protrude with a diameter smaller than the outer diameter of the synthetic resin coating tube, and the lid is coated with the synthetic resin. It can be easily attached simply by pushing it into the end of the body.

According to a second aspect of the present invention, there is provided a structure for attaching a terminal cap to a synthetic resin cladding tube, wherein the surface of the terminal cap is flush with the end surface of the synthetic resin layer, and the end portion of the synthetic resin cladding tube is provided. There is no protrusion.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an end portion of a synthetic resin cladding tube showing an example of an embodiment of a terminal cap attaching structure of the synthetic resin cladding tube of the present invention.

[0008] The tube 1 has a cylindrical shape, and a connecting member 2 is inserted into an end thereof, and is covered with a synthetic resin together with the tube 1. The connecting member 2 is inserted into the end of the tube 1 and is covered with a synthetic resin together with the tube 1, and the flange 22 of the connecting member 2 is welded to the synthetic resin. Engaging part 23 formed on the inner wall of cylindrical part 21
Locking portion 3 formed on the back surface of lid 32 of terminal cap 3
1 is locked, and the terminal cap 3 is attached to the end of the synthetic resin coating tube. Although the tubular body 1 has been described as having a cylindrical shape, it may have an appropriate cross-sectional shape such as a square shape, and is generally made of a metal pipe such as a steel pipe, but may be made of a synthetic resin pipe or the like.

The connecting member 2 comprises a tubular portion 21 and a flange 22 provided at an end of the tubular portion 21. The tubular portion 21 has an outer diameter substantially equal to the inner diameter of the tube 1. The outer diameter of the flange 22 is substantially the same as the outer diameter of the tube 1. Tubular part 21
An engaging portion 23 having a sawtooth cross section is formed on the inner wall over the entire circumference. The connecting member 2 may be made by casting a metal, or may be made by molding a synthetic resin, provided that the connecting member 2 is made of a synthetic resin compatible with the synthetic resin to be coated on the tube 1. This is preferable because it is easily welded to the synthetic resin layer 4.

A synthetic resin layer 4 formed by coating the outer wall of the tube 1 with a synthetic resin projects from the flange 22 of the connecting member 2 attached to the end of the tube 1 by the thickness of the lid 32. When the terminal cap 3 is formed and attached to the end of the synthetic resin coating tube, there is no step between the surface of the terminal cap 3 and the end of the synthetic resin layer 4 so that there is no problem that the end is caught on the human body or clothes. . The edge of the synthetic resin layer 4 is formed in a curved surface so that no corners remain. The synthetic resin layer 4 is generally made of a suitable synthetic resin such as polyethylene or polypropylene polyvinyl chloride, but may be formed of a synthetic resin foam.

The terminal cap 3 has a cylindrical locking portion 31 formed on its outer wall with a sawtooth cross section, and a lid 32 provided at one end of the locking portion 31. 2 has a shape and size suitable for the engaging portion 23 provided on the inner wall. The lid 32 is a plate-like body having substantially the same diameter as the inner diameter of the synthetic resin layer 4 and is provided at one end of the locking portion 31. When the terminal cap 3 is attached to the end of the tube 1, the synthetic resin coating tube is formed. It is made to hide the inside of the. The terminal cap may be manufactured by bending a metal plate such as a steel plate or by casting a metal, but is generally manufactured by molding a synthetic resin.

Next, a method for constructing a protective fence by the structure for attaching a terminal cap of the synthetic resin-coated tube of the present invention will be described. A beam mounting hole is provided on the side wall of the synthetic resin coating tube of the present invention, and is used as a column A. Terminal cap 3 at the upper end of column A
Is not attached before the construction, a make-up 6 is inserted into the beam mounting hole, a beam pipe B is inserted into the make-up 6, and a beam pipe B is provided so as to penetrate the tip of the beam pipe B. Attachment pins 5 are inserted into the through holes from the opening ends of the upper portions of the columns to prevent the beam pipe B from coming off. After the insertion of the mounting pin 5, the terminal cap 3 is inserted into the upper end of the support, and the construction is completed.

[0013]

As described above, according to the first aspect of the present invention, the terminal cap mounting structure of the synthetic resin-coated tube is a synthetic resin-coated tube in which the outer wall of the tube is coated with a synthetic resin, and the end of the synthetic resin-coated tube. In a terminal cap attachment structure of a synthetic resin cladding tube comprising a connecting member attached to the portion and a terminal cap fitted and attached to the connecting member, the outer diameter of the connecting member is substantially the same as the inner diameter of the tube. A cylindrical portion having an engagement portion formed on the inner wall thereof, and an outer diameter formed at one end of the cylindrical portion is formed of a flange-like body having substantially the same size as the outer diameter of the tubular body. A lid having substantially the same diameter as the outer diameter of the tubular body, and a locking portion formed on the back surface of the lid so as to be locked to the engaging portion of the connecting material, and the connecting material is provided at the end of the tubular body. The tubular portion is inserted and the flange is abutted and attached to the end face of the tubular body, and the synthetic resin layer covering the tubular body is projected from the connecting material at the end of the tubular body. The locking portion of the terminal cap is inserted into this connecting material and is locked and attached to the engaging portion, so that the lid does not protrude with a diameter smaller than the outer diameter of the synthetic resin coating tube, and the lid is formed of a synthetic resin coating. It can be easily attached simply by pushing it into the end of the cable. For this reason, if the synthetic resin cladding tube having the terminal cap attaching structure of the synthetic resin cladding tube is used as a pillar of a protective fence, the pedestrian and the clothes of the pedestrian will not be caught and will be a safe pillar. . Further, since the cap is easily attached after the construction, the work can be easily performed from the opening at the upper end of the column as described above, and the construction can be easily performed regardless of the type of the protective fence. Also, since the connecting material is attached along the inner wall of the tube, the same connecting material can be used even if the outer diameter of the synthetic resin cladding tube is different if the inner diameter of the tube is the same,
As shown in FIG. 1 and FIG. 4, even if the thickness of the synthetic resin layer is different, a common connecting member and a terminal cap can be used, and the components are made common and a suitable terminal cap mounting structure is obtained.

According to a second aspect of the present invention, there is provided a structure for attaching a terminal cap to a synthetic resin cladding tube, wherein the surface of the terminal cap is flush with the end surface of the synthetic resin layer. There is no protrusion. There are no corners at the end of the synthetic resin cladding tube, and there is no injury even if human hands touch it.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a terminal of a synthetic resin-coated tube showing an example of an embodiment of a terminal cap attachment structure of the synthetic resin-coated tube of the present invention.

FIG. 2 is a front view showing an example of an embodiment of a protective fence using a terminal cap attachment structure of the synthetic resin-coated tube of the present invention.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is a partially cutaway detailed view of a terminal of a synthetic resin cladding tube showing another example of the embodiment of the terminal cap attaching structure of the synthetic resin cladding tube of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube 2 Connecting material 21 Cylindrical part 22 Flange-like body 23 Engaging part 3 Terminal cap 31 Locking part 32 Lid 4 Synthetic resin layer 5 Mounting pin 6 Makeup A Prop B Beam pipe

Claims (2)

[Claims] 1. A synthetic resin coated tube in which an outer wall of a tube is coated with a synthetic resin, a connecting member attached to an end of the synthetic resin coated tube, and a terminal cap fitted and attached to the connecting member. In the end cap attaching structure of the synthetic resin-coated tube, the outer diameter of the connecting member is substantially the same as the inner diameter of the tube, and the cylindrical portion having the engaging portion formed on the inner wall and the cylindrical portion An outer diameter formed at one end is formed of a flange-like body having substantially the same size as the outer diameter of the tube,
The terminal cap includes a lid having substantially the same diameter as the outer diameter of the tubular body, and a locking portion formed on the back surface of the lid so as to be locked by the engaging portion of the connecting member. The tubular portion of the connecting member is inserted into the tube, the flange is abutted and attached to the end surface of the tube, and the synthetic resin layer covering the tube is projected from the connecting member at the end of the tube. A terminal cap mounting structure for a synthetic resin cladding tube, wherein a locking portion of the cap is inserted and locked to the engaging portion. 2. The terminal cap mounting structure according to claim 1, wherein a surface of the terminal cap is flush with an end surface of the synthetic resin layer.