JPH026761Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to agricultural and horticultural supports with excellent watertightness.

(Prior art) Conventional agricultural and horticultural supports, as shown in Figure 5,
A coating 101 of synthetic resin, plating, etc. is formed on the outer surface of the metal tube 100 to perform rust prevention treatment.
In order to prevent water from entering inside the metal tube 100, caps 103 are fitted to both ends of the metal tube 100 (however, only one end is shown in the figure) via an adhesive 102.

(Problems to be Solved by the Invention) However, in such conventional supports, it is difficult to uniformly interpose the adhesive 102 between the coating 101 of the metal tube and the cap 103, and some gaps inevitably occur. When the metal pipe 100 is stuck in the ground and used, water enters the pipe through the gap and accumulates, causing rust on the inner surface of the metal pipe 100.

(Means for Solving the Problem) In order to solve this problem, the present invention provides a support column in which caps are fitted to both ends of a metal tube whose outer surface has been subjected to anti-rust treatment. An annular groove is formed, and the end of the metal tube is fitted into the annular groove via an unvulcanized rubber sealing material.

(Function) With this configuration, even if water intrudes between the outer surface of the metal tube and the cap, it will be prevented by the sealing material interposed between the annular groove inside the cap and the end of the metal tube. Since water is prevented from entering the metal tube, rust does not occur on the inner surface of the metal tube. In particular, since the sealing material is made of unvulcanized rubber with poor elasticity and has adhesive properties, and is in close contact with the end surface and inner surface of the metal tube, the water sealing effect is extremely good.

Hereinafter, the present invention will be described in detail with reference to Examples.

(Example) The plantation support shown in FIG. 1 has a coating 2 made of synthetic resin such as polyvinyl chloride or polyethylene on the outer surface of a metal pipe 1 such as a steel pipe to prevent rust on the outer surface of the metal pipe. A large number of protrusions 3 are formed on this coating 2 at appropriate intervals. This protrusion 3 prevents the string or wire from moving up and down when the stems of cultivated plants are tied to this support with string or wire, and also gives the impression of a bamboo shoot, which increases the commercial value. It was created to improve the performance of the user, and can be omitted if it is unnecessary.

Two types of caps 4 and 5 made of synthetic resin such as polyvinyl chloride and polyethylene are fitted onto both ends of the metal tube 1 via an adhesive 6, respectively. One cap 4 has an inverted U-shaped cross section, while the other cap 5 has a pointed shape so that it can be easily inserted into the soil. is provided. This annular groove 7 is provided by forming an annular holder 8 concentrically inside the cap 5, and the inner side wall surface 9 of the groove 7 (the outer side wall surface of the annular holder 8) has the following features:
It has an upwardly tapering shape.

The end of the metal tube 1 is fitted into the annular groove 7 with a sealing material 10 interposed therebetween. This sealing material 10
As shown in FIG. 2, the cap 5 is a disc-shaped member having a diameter approximately equal to the inner diameter of the cap 5, and is made of unvulcanized rubber mixed with carbon. Therefore, this sealing material 10 has almost no elasticity and has adhesive properties. When the end of the metal tube 1 is inserted into the annular groove 7 through such a sealing material 10,
Since the sealing material 10 does not rebound due to elastic force, the outer peripheral edge of the sealing material 10 is reliably interposed between the metal tube 1 and the annular groove 7, as shown in FIGS. 1 and 3. Moreover, the sealing material 1
Due to the zero tackiness, it can be brought into close contact with the end surface and inner surface of the metal tube 1. In that case, the sealing material 10 is pressed in the direction of the arrow in FIG.
It adheres strongly and exhibits an excellent water-sealing effect. Therefore, even if water infiltrates between the outer surface of the metal tube 1 and the cap 5, it will not enter into the tube, and rust will not form on the inner surface of the metal tube 1.

In this embodiment, only one cap 5 (the one inserted into the soil) has a water-seal structure as described above, but the other cap 4 may also have a similar water-seal structure if necessary. Needless to say. Furthermore, as an unvulcanized rubber sealing material,
A donut plate-shaped sealing material 10a as shown in the embodiment of FIG. 4 may be used, and a cap 5a as shown in the embodiment of FIG. A cap 5a provided with an annular groove 7a by forming an annular groove 7a may also be used.

(Effects) As can be understood from the above explanation, the present invention has the following effects:
In a strut that has caps fitted to both ends of a metal tube whose outer surface has been treated with anti-corrosion treatment, an annular groove is formed inside at least one of the caps, and an unvulcanized rubber seal is inserted into the end of the metal tube. Since the structure is such that the cap is inserted into the annular groove, even if water enters between the outer surface of the metal tube and the cap, the sealing material interposed between the annular groove inside the cap and the end of the metal tube will prevent water from entering between the outer surface of the metal tube and the cap. This can prevent water from flowing into the metal pipe.
In particular, the sealing material is made of unvulcanized rubber with poor elasticity, has adhesive properties, and is in close contact with the end surface and inner surface of the metal tube, so that the water sealing effect is extremely good.
Therefore, it is possible to satisfactorily prevent rust from forming on the inner surface of the metal tube, and this is a highly useful device.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of one embodiment of the present invention, Fig. 2 is a partially exploded enlarged sectional view of the same embodiment, Fig. 3 is a partially enlarged sectional view of the same embodiment, and Fig. 4 is a cross-sectional view of an embodiment of the present invention. FIG. 5 is a partially exploded sectional view of the embodiment of FIG. 5, and FIG. 5 is a partially exploded sectional view of the conventional example. 1...Metal tube, 2...Coating, 4, 5, 5a...
Cap, 7, 7a... Annular groove, 10, 10a...
...Unvulcanized rubber sealing material.

Claims (1)

[Scope of utility model registration request] In a strut that has caps fitted to both ends of a metal tube whose outer surface has been treated with anti-corrosion treatment, an annular groove is formed inside at least one of the caps, and an unvulcanized rubber seal is inserted into the end of the metal tube. An agricultural and horticultural support that is fitted into an annular groove.