JPH074217Y2 - Pair of pipe caps - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a pipe material cap that is attached to both open ends of a pipe material to protect the pipe end portion and to prevent foreign matter from entering the inside. It is about pairs.

(Prior Art) In a conventional pipe material cap pair mounted on both open ends of a pipe material, both caps have the same shape.

(Problems to be Solved by the Invention) The present inventor has developed a pipe material in which both end portions are protected by a pipe material cap and the entire side surface including the cap is resin-coated. Then, as a method for efficiently manufacturing such a pipe material, a plurality of pipe materials having pipe material caps attached to both opening ends are arranged so as to be connected in a straight line on a work line, and the pipe material group is We have developed a method in which the entire side surface is coated with an automatic coating device while moving in the direction, and then cut into individual pipes (pipes with caps) at the connection points.

However, when the conventional pipe material cap pair is used, the axial centers of the respective pipe materials become uneven, and it becomes difficult to connect the pipe materials accurately in a straight line, so that the coating shape of the resin coating becomes uneven, There were problems such as impairing aesthetics and not being able to smoothly perform resin coating work.

(Means for Solving the Problem) In order to solve the above-mentioned problems, the present invention provides a pair of caps for a pipe material mounted on both open ends of the pipe material, and a resin is provided on the entire side surface of the pipe material and the cap pair for the pipe material. In a pipe material cap pair used for a material to be coated, it is composed of a male cap and a female cap, and the male cap is attached to one open end of the pipe material, and the side peripheral shape of the head exposed from the pipe end. Is the same as the side circumferential shape of the pipe material, and an engaging convex part that protrudes in the pipe longitudinal direction is formed on the head, and the female cap is attached to the other open end of the pipe material and exposed from the pipe end. The side circumference shape of the head part matches the side circumference shape of the pipe material,
In addition, an engaging concave portion is formed on the head so that the engaging convex portion has the same axial center as that of the engaging convex portion and can be engaged therewith.

(Operation) According to the pipe material cap pair configured as described above, in connecting a plurality of pipe materials in a straight line in the resin coating operation, the male caps provided at the adjacent open end portions of these pipe materials are connected. By engaging the engaging convex portion and the engaging concave portion of the female cap, the axial centers of the respective pipe materials can be accurately matched, and the side peripheral shapes of the head portions of both caps are the same as the side peripheral shape of the pipe material. Therefore, the entire side circumference shape in which a plurality of pipe materials are connected in a straight line is the same over the entire longitudinal direction, and it is possible to easily and accurately apply the resin coating with a uniform thickness to the side peripheral surfaces of the pipe material and the cap. You can

The male and female caps can also perform the original function of protecting both open ends of the pipe material and preventing foreign matter from entering the inside.

(Embodiment) FIGS. 1 and 2 show a first embodiment of the present invention.
Reference numerals 2 and 1 respectively denote front and rear rigid pipe members, and these pipe members 1 and 2 are hollow pipes having a rectangular cross section, which are made of metal (aluminum, iron, etc.) or hard synthetic resin. There is. A male cap 3 and a female cap 4 are tightly fitted to the front open end and the rear open end of the pipes 1 and 2, respectively. Male cap 3 and female cap 4
Is made of synthetic resin or aluminum. Both caps 3 and 4 are formed so that they can be inserted into the heads 5 and 6 having the same outer peripheral shape as the pipe materials 1 and 2 and the open end portions 1a and 1b of the pipe materials 1 and 2 in a close contact state. In common with the insertion parts 7 and 8, the male cap 3 has a head part 5.
The difference is that the female projection 4 has an engaging concave portion 10 at the center line position of the head portion 6, whereas the female convex portion 4 has an engaging convex portion 9 at the center line position. More specifically, as shown in FIG. 2, the engaging projection 9 of the male cap 3 projects forward with a taper having a rectangular cross section and an appropriate length and inclination angle at the center of the front surface of the head 5. It is set up. On the other hand, the engaging concave portion 10 of the female cap 4 is provided at the central portion of the front surface of the head 6 so that it can be closely engaged with the engaging convex portion 9 as shown in FIG.

Then, during the resin coating operation, as shown in FIG. 1, a plurality of pipe members 1 and 2 are arranged on the work line so as to be connected in a straight line. At this time, due to the engagement of the engaging convex portion 9 and the engaging concave portion 10, the pipe member 1,
The axes of the two axes coincide with each other, and the position can be aligned. Further, in this case, since the cross sections of the engaging concave-convex portions 10 and 9 are rectangular, not only the axial alignment of the pipe members 1 and 2 but also the pipe members 1 and 2 are performed.
It is also possible to regulate the rotation of the central axis of the.

In this manner, the plurality of pipe members 1, 2 are connected in a straight line.
By moving on the work line, the entire side peripheral surfaces of the pipe materials 1 and 2 and the caps 3 and 4 are coated with the synthetic resin outer skin 11 having a uniform film thickness.

Next, a second embodiment of the present invention shown in FIG. 3 is that an insertion portion 12 which can be closely fitted to an open end of a tubular material 15 made of a hollow tube having a circular cross section, and an outer peripheral shape of the tubular material 15 are provided. A male cap (14) having the same outer peripheral shape and a head (13) having an engaging projection (16) is provided.

The engaging projection 16 is formed to have a circular cross section. Although illustration of the female cap is omitted, it is needless to say that the female cap has an engaging concave portion having a circular cross section capable of engaging with the engaging convex portion 16 at its head.

Further, the third embodiment shown in FIG. 4 is provided with a male cap 17 used for a pipe material having a rectangular cross section. This male cap 17 has four engaging projections 19 on its head. The corresponding female cap (not shown) has four engaging recesses that engage with these engaging protrusions 19.

The present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the gist of the invention. For example, the number and shape of the engaging projections and the engaging recesses may be arbitrarily changed, or the engaging projections and the engaging recesses that are engageable with each other may be mixed in both adjacent pipe material caps. It is also possible to use.

(Effects of the Invention) Since the present invention has the above-described structure and operation, it can protect the open end of the pipe material, prevent foreign matter from entering through the open end, and connect a plurality of pipe materials in a straight line. It is possible to provide a cap for a pipe material which can be easily coated with a resin having a uniform thickness when the side peripheral surface is coated with the resin and which can improve the appearance.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention.
FIG. 1 is a vertical cross-sectional side view of a pipe cap pair of the present invention used for aligning pipe members, FIG. 2 is a perspective view of a male cap, and FIGS. 3 and 4 are the second embodiment and the second embodiment, respectively. It is a perspective view corresponding to FIG. 2 in the third embodiment. 1, 2, 15 ...... Tube material 3, 14, 7 ...... Male cap 4 ...... Female cap 5, 6, 13 ...... Head part 9, 16, 19 ...... Engagement convex part 10 ...... Engagement concave part

Claims (1)

[Scope of utility model registration request] 1. A pipe material cap pair to be mounted on both open ends of a pipe material, wherein the pipe material and the pipe material cap pair have a resin coating on the entire side surface thereof. It is composed of a male cap and a female cap.The male cap is attached to one open end of the pipe material, the side circumference shape of the head exposed from the pipe end matches the side circumference shape of the pipe material, and The female projection is formed with an engaging projection protruding in the hand direction, and the female cap is attached to the other open end of the pipe material, and the side peripheral shape of the head exposed from the pipe end is the same as the side peripheral shape of the pipe material. In addition, the cap cap for pipe material is characterized in that an engaging recess is formed in the head so that the shaft center coincides with the engaging protrusion and the engaging recess can be engaged with the engaging protrusion.