JP5270195B2 - Plastic pipe for greenhouse - Google Patents

Description

  The present invention relates to a pipe for a vinyl house that forms a skeleton of the vinyl house.

  In general, as shown in FIG. 1, a vinyl house is bent so that the lower part is perpendicular to the ground and the upper part (roof part) is round, and a plurality of support pipes are fixed to the ground at regular intervals. The skeleton is formed by installing horizontal pipes connecting the support pipes in the horizontal direction. Then, if a vinyl sheet is bonded to the outside of the skeleton, the vinyl house is completed.

  However, such a vinyl house can be damaged if a strong wind blows or heavy snow in winter occurs. To the roof of the vinyl house, especially if heavy snow in winter occurs. As a result, the pillar pipe could not withstand the weight of the snow piled up in the vinyl house, causing damage to collapse. Therefore, in order to prevent such damage, a thick support pipe must be used. However, since the thick support pipe is expensive, there is a problem that it is not easy to install in a poor rural area, for example.

  Therefore, in order to solve the problems as described above, the support pipe shown in Patent Document 1 is used. This is because when the pipe is installed horizontally as shown in the pipe cross section of FIG. 2 (A), the pipe used in the vertical direction with respect to the ground is used. By forming a pipe with a groove formed on the lower surface in the inner direction of the pipe, it is possible to withstand the weight of snow accumulated in the vinyl house during heavy snow.

  Further, as another method, a support pipe shown in Patent Document 2 was also used. As shown in the cross section of the pipe shown in FIG. 2 (B), this is a structure in which protrusions protruding in the horizontal and vertical directions of the pipe are formed, and piled up in the vinyl house during heavy snow. It is designed to withstand the weight of snow.

Korean Patent No. 318813 Korean Utility Model No. 249943 Specification

  However, the pipes shown in Patent Documents 1 and 2 are stronger in the ability to withstand the load of snow than the pipe having a circular cross section shown in FIG. 1, but in the case of the pipe of Patent Document 1, the pipe shown in FIG. ) When the accumulated snow load acts in the A direction, the pressure of the internal air of the pipe acts in the B direction, and the force that spreads the side surface of the pipe in the lateral direction (B direction) In the case of excessive snow accumulation, there is a problem that the snow load cannot be overcome. In the case of the pipe of Patent Document 2, as shown in FIG. 2 (B), when a snow load acts in the A direction, a concentrated load C is applied to the connecting parts of the protrusions protruding in the horizontal direction of the pipe. Therefore, there was still a problem that it could not sufficiently withstand the load of snow.

  Therefore, the present invention has been made in view of such a problem, and the object of the present invention is to withstand the load of snow sufficiently even when a load of snow is applied from the upper part of the vinyl house. An object of the present invention is to provide a pipe for a vinyl house that can prevent the collapse of the glass.

  In order to solve the above-mentioned problems, according to one aspect of the present invention, in a plastic pipe for a vinyl house, which is a column constituting the skeleton of the vinyl house, a square pipe having a corner portion formed by a curved surface, the four side surfaces are formed. In the center of each of the two side surfaces up and down when installed horizontally on the ground, a groove formed in a curved surface in the inner direction, and each of the two side surfaces on the left and right when installed horizontally on the ground, There is provided a pipe for a vinyl house, comprising an inclined surface formed so that a center is curved in an inward direction. Here, the square pipe in which the corners of the present invention are formed with curved surfaces is, for example, a pipe having a shape close to a square obtained by crimping a pipe having a circular cross-sectional shape.

  In this way, when the plastic pipe is used so that the side surface on which the groove is formed is on the upper side (roof side), when a snow load from the upper part is applied, the groove formed by the curved surfaces on the upper and lower sides is formed. In addition to generating a repulsive force against the snow load, and a force that pushes outward in the horizontal direction due to the load from the top, the force that tends to incline further inside the inclined surface of the lateral surface Since it acts so as to cancel the pushing force, the pipe can be prevented from being squeezed and broken.

  Here, the inclination angle θ of the inclined surface may be 2 ° to 5 ° with respect to a direction perpendicular to the side surface on which the groove is formed. By setting the inclined surface to such an inclination angle θ, it is possible to effectively generate a force that acts to cancel out the force pushing outward in the horizontal direction generated inside the pipe due to the load from above. .

Central and both sides of the vertex of the inclined surface may be present on a curved surface. By location the presence of vertex is curved, force opposing the load smoothly be acting, also when the load is removed, may have the effect of increasing the resilience of the pipe vinyl house.

  As described above in detail, according to the present invention, when excessive snow is piled up on the roof of the vinyl house due to heavy snow, the curved grooves formed on the upper and lower side surfaces of the vinyl house pipe repel the force due to the load, The slanted surface formed on the left and right side surfaces inclines to counteract the internal repulsive force, preventing the pipe from being squeezed and increasing the strength of the pipe. It can withstand and prevent the collapse of the vinyl house.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  FIG. 3 is a perspective view showing a pipe for a vinyl house according to the present embodiment. FIG. 4 shows a section of the pipe for a vinyl house according to the present embodiment, and is an explanatory view showing an action state with respect to a load from the upper part in FIG. Further, FIG. 5 shows an enlarged view of a portion D in FIG.

  When a load is applied to the vinyl house due to heavy snow falling on the upper part of the vinyl house, the pillar pipe 1 that forms the skeleton of the vinyl house and supports the vinyl house is sufficient for the snow load. Must be able to withstand Therefore, as shown in FIG. 3 and FIG. 4, the support pipe 1 according to the present embodiment is a square pipe with a corner portion formed by a curved surface, and has four side surfaces and four side surfaces. When installed horizontally on the ground, a groove (curved groove 2) formed with a curved surface in the inner direction at each of the centers of the two upper and lower side surfaces and two side surfaces on the left and right when installed horizontally on the ground Are provided with an inclined surface 3 formed so that the center is recessed inward.

At this time, the inclination angle of the inclined surface 3 formed on the side surface can have an angle θ with respect to the direction perpendicular to the side surface on which the curved groove 2 is formed, as shown in FIG. And it is preferable that the angle of (theta) which forms the inclined surface 3 is 2 degrees-5 degrees. Further, the center of the top points a and both sides of the vertex b of the inclined surface 3 is preferably present on a curved surface. The operation of this embodiment will be described as follows.

  When a large amount of snow is accumulated on the upper part of the vinyl house due to heavy snow, the accumulated snow load acts in the A direction from the upper part of the support pipe 1 as shown in FIG. At this time, in the support pipe 1, first, the curved groove 2 formed in the upper portion generates a repulsive force against the snow load. Next, when a load higher than the repulsive force of the curved groove 2 formed in the upper part is applied to the support pipe 1, a repulsive force acts in the B direction inside the support pipe 1. Such a repulsive force acts as a force pushing outward in the lateral direction (horizontal direction) with respect to the left and right side surfaces of the support pipe 1. Therefore, the force in the B direction generated from the inside of the support pipe 1 acts on the side surface inclined at an angle of θ inward, and acts as a repulsive force that prevents the support pipe 1 from being squeezed.

  More specifically, when a load is applied to the support pipe 1 in the A direction, a force for maintaining the internal space inside the support pipe 1 acts in the B direction. Such a force in the B direction acts as a force for pushing the inclined surface 3 on the side surface of the support pipe 1 outward. Therefore, the center of the inclined surface 3 on the side surface of the support pipe 1 has an inclination of an angle of θ on the inside, thereby causing a phenomenon that the inclined surface 3 tends to become flat, and this phenomenon is a load applied from above. It acts as a force that counteracts the above and prevents breakage of the support pipe 1.

In this case, each vertex of the inclined surface 3 a, present location of b is preferably has a curved shape. This is to increase the restoring force of the support pipe 1 when the load is removed so that the force against the load acts smoothly.

  Thus, according to the vinyl house pipe of the present embodiment, when a load is applied to the upper part, the curved groove 2 formed in the upper part is repelled by this load, and secondarily, In other words, when a higher load is applied, the internally generated repulsive force acts on the inclined surface 3, thereby increasing the force with which the vinyl house pipe can withstand the load and preventing the vinyl house from being damaged. Is.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention can be applied to a pipe for a vinyl house that forms a skeleton of the vinyl house.

It is a perspective view which shows the structure of a general vinyl house. It is explanatory drawing which shows the cross section of the conventional pipe for vinyl houses, and shows the action state with respect to the load from an upper part, (A) is a pipe of the structure where the groove | channel was formed in the inner direction of a pipe, (B) is four directions This is a pipe having a structure in which a protruding protrusion is formed. It is a perspective view which shows the pipe for vinyl houses by this Embodiment. It is explanatory drawing which shows the cross section of the pipe for vinyl houses by this Embodiment, and shows the action state with respect to the load from the upper part in FIG. It is an enlarged view of the D section of FIG.

Explanation of symbols

1 strut pipe second curved groove 3 inclined surface a vertex <br/> b vertex

Claims (3)

In the pipe for the vinyl house, which is the column that forms the skeleton of the vinyl house;
A square pipe with a corner formed by a curved surface, having four side surfaces,
A curved groove formed in a curved surface in the inner direction at the center of each of the two upper and lower side surfaces when installed horizontally on the ground;
When installed horizontally on the ground, on each of the two left and right side surfaces, an inclined surface composed of a flat surface formed such that the center is recessed inward,
Equipped with a,
A pipe for a vinyl house, wherein the inclined surface is flat between vertices.   The vinyl house pipe according to claim 1, wherein an inclination angle θ of the inclined surface is 2 ° to 5 ° with respect to a direction perpendicular to the side surface on which the groove is formed. The central and both sides of the vertex of the inclined surface, characterized in that present on a curved surface, a vinyl house pipe according to claim 1 or 2.

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