JPH0649169Y2 - Agricultural horticultural support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an agricultural and horticultural support for supporting stems and branches of plants.

[Prior Art] Conventionally, it is well known that the outer periphery of a metal tube is coated with a synthetic resin, and both ends thereof are provided with a synthetic resin cap. Kosho 62
It is already well known as described in publications such as −33190.

[Problems to be Solved by the Invention] When fitting a synthetic resin cap to a pipe having a synthetic resin coating on the outer circumference of a metal pipe, if the clearance between the inner diameter of the cap and the outer diameter of the coating pipe is large, There is a problem that the cap is easily removed, and conversely, if the cap is too small, the cap cannot be fitted.

Further, in order to solve the above-mentioned problem due to the size of the clearance, there is a means of providing a small convex rib on the inner wall surface of the cap as seen in Japanese Utility Model Publication 62-33190. However, this has a problem that when the cap and the pipe are fitted together, the convex rib abuts on the synthetic resin coating surface of the pipe, causing the coating surface to be peeled off or damaged. Further, in the case of the convex rib, since the contact portion between the cap and the pipe is a line contact, the effect of bonding with an adhesive is weak,
There is a problem that the cap is easily removed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an agricultural and horticultural support pillar in which the cap is not easily removed in the support pillar in which the cap is closely fitted to the synthetic resin coating pipe. Is.

[Means for Solving Problems] In the agricultural and horticultural support of the present invention, a metal tube is provided with a synthetic resin coating on its outer periphery, and a synthetic resin cap is externally fitted to both ends of the support. A plurality of convex ribs are provided in the direction, and the width of the convex rib gradually increases from the inlet portion of the cap toward the inner portion, and the synthetic resin coating surface and the convex rib form an adhesive. It is the one that is bonded through.

[Operation] In the present invention, since convex ribs are provided on the inner wall surface of the cap that is externally fitted to both ends of the strut, the inner diameter of the synthetic resin-coated pipe varies due to variations in the outer diameter and shrinkage after molding of the cap. The variation can be eliminated, and the width of the convex rib is gradually widened from the inlet to the inner portion of the inner wall surface of the cap, so that the cap and the synthetic resin coating pipe can be easily fitted to each other and the convex rib can be easily fitted. Do not flip over or damage the ends of the coating. And since the convex ribs are wide in the inner part of the cap, the contact area with the outer circumference of the cladding tube increases and the contact pressure also increases, the adhesive strength of the adhesive becomes extremely strong, and the cap comes off from the tube. It gets harder.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a cap 1 fitted to both ends of an agricultural and horticultural support of the present invention, and FIG. 2 is an enlarged cross-sectional view of the cap 1 cut longitudinally along a center line. Is.

Reference numeral 1 is a cap, 2 is an inner wall surface of the cap 1, 3 is an inlet portion of the cap 1, 4 is a convex rib provided at a plurality of positions on the inner wall surface 2 at equal intervals, and the width of the convex rib 4 is The width gradually increases from the entrance of the cap 1 toward the back 6. The cap 1 is made so that its inner diameter is the same as or substantially the same as the outer diameter of the synthetic resin-coated metal pipe 5, and such a cap 1 is fitted over both ends of the pipe 5 and the cap 1 Inner wall surface (including both the inner surface of the convex rib 4 and the inner surface between the convex ribs 4) 2 is adhered via an adhesive. The adhesive is the cap and tube 5.
It is desirable to completely fill the gap between and.

According to the cap 1, the area occupied by the inner surface of the convex rib 4 is smaller than the total area of the inner wall surface 2 of the inlet portion 3, and the inner wall surface 2 of the inner portion 6 is smaller than the total area. The area occupied by the inner surface of the convex rib 4 increases. Therefore, when the cap 1 and the pipe 5 are fitted to each other, the convex rib 4 only hits a very small portion of the covering of the pipe 5 in the initial stage of the fitting, so that the two can be fitted easily. ,
After the pipe 5 is fitted into the inlet part 3, as the pipe 5 is pushed toward the inner part 6 of the cap 1, the contact area between the coating and the convex rib 4 is gradually increased and is pushed completely. Since the contact area is maximized, the convex ribs 4 strongly tighten the tube 5. Therefore, although the pipe 5 and the cap 1 can be easily fitted to each other and the end portion of the coating is not flipped up or damaged by the convex rib 4 at the time of fitting, the pipe in the bonded state after fitting can be prevented. Since 5 and the convex rib 4 are strongly pressure-bonded via the adhesive, the adhesive strength of the adhesive becomes extremely strong, which makes it difficult to come off. The adhesive is applied to the inner wall surface 2 of the convex rib 4 or the pipe 5 before fitting.

By the way, the cap 1 is often injection-molded, and in that case, the inner wall surface 2 of the cap 1 (including both the inner surface of the convex rib 4 and the inner surface located between the convex ribs 4) is included. Often the same angle of draft is applied. Although this die cutting gradient is extremely small, the inner diameter of the inlet portion 3 of the cap 1 is different from that of the inner portion 6 due to the die cutting gradient. Specifically, the inner diameter is about 20 mm
In the cap 1 of the above, the inlet portion 3 is about
It becomes about 0.2 mm larger. Therefore, when the cap 1 is injection-molded, the convex ribs 4 are formed on a very small portion of the coating of the pipe 5 at the initial stage of fitting the cap 1 and the pipe 5.
The fact that the inner diameter of the inlet portion 3 is about 0.2 mm larger than the inner portion of the inlet portion 3 facilitates easy fitting, which results in a molding error of the cap 1. It is also useful to prevent the ease of fitting from being impaired even if there is variation in the outer shape of the pipe 5 or the like. Further, when the pipe 5 is pushed all the way into the inner part 6 of the cap 1, the contact area between the convex rib 4 and the pipe 5 is maximized, and the inner diameter of the cap 1 is about 0.2 mm larger than that of the inlet part 3. Combined with the small size, there is an advantage that the tightening action by the convex rib 4 is promoted.

In the cap 1 having an inner diameter of about 20 mm, the width of the convex rib 4 at the inlet portion 3 is preferably 0.5 to 1.0 mm, and the width near the inner portion 6 is preferably about 3 to 8 mm. The above numerical values are applied when the covering material of the synthetic resin covered pipe is soft polyvinyl chloride, polyethylene or the like, and it is necessary to change if the kind or hardness of the resin changes.

Further, although it is desired that the number of the convex ribs 4 is three or more, if the number is too large, the dimensional difference in the width between the inlet portion 3 and the inner portion 6 becomes too small, and the above-described fitting is facilitated. There is a possibility that the effect of the height and the tightening effect after fitting may not be remarkably exerted. 4 if the inner diameter of the cap is small,
Even if it is large, it is desirable to use up to 10.

[Effects of the Invention] As is apparent from the above description, in the present invention, the convex rib has a special shape, so that there are dimensional errors due to molding of the cap and variations in the outer dimensions of the synthetic resin-coated metal tube. However, there is an effect that the end portion of the pipe is easily fitted to the cap, and the coating of the pipe is hardly peeled off at the time of fitting. Further, since the cap and the synthetic resin coating surface of the pipe are firmly adhered, there is an effect that the cap is hard to come off. In other words, in the present invention, the cap has a special effect that it is easy to fit on the pipe end and is hard to come off once fitted and bonded.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the cap of the present invention, and FIG. 2 is an enlarged cross-sectional view of the cap of FIG. 1 cut axially along the center. 1 ... Cap, 2 ... Inner wall, 3 ... Entrance part, 4 ... Convex rib,
6 ... back.

Claims (1)

[Scope of utility model registration request] 1. A column having synthetic resin coating on the outer periphery of a metal tube and externally fitted synthetic resin caps on both ends of the metal tube, wherein convex ribs are provided at a plurality of circumferential positions on the inner wall surface of the cap. The width of the rib is gradually widened from the inlet portion of the cap toward the inner portion, and the synthetic resin coating surface and the convex rib are adhered via an adhesive agent for agricultural and horticultural use. Prop.