Roof structure for greenhouses

Abstract

A roof structure for greenhouses, which, through having a simple arrangement for improving lighting, is capable of retaining the same strength as in the conventional roof structure for greenhouses. A plurality of rafter members in the form of metal pipes of circular cross section formed in arch shape with a pipe diameter of about 30 mm to about 50 mm, are arranged in the direction of the roof ridge at intervals (P) of about 0.5m to about 1.5m. This makes it possible to simplify the construction of the aggregate constituting the roof while retaining a predetermined strength. That is, simply joining the rafter members by ridge pieces provides a sufficient strength to withstand vertical and horizontal loads applied to the roof; therefore, purlin members can be dispensed with. Further, since the construction of the housing can have a window to allow visual inspection of the internal component of the housing and to determine visually whether a filter element is installed therein.

Description

technical field [0001] The present invention relates to the roof structure of a greenhouse, and more specifically, to the structure of aggregates constituting the roof of a greenhouse, and a technique for laying a covering material suitable for the structure of the aggregates. technical background [0002] In the past, as the roof structure of a greenhouse, as shown in FIG. 4, the following structure has been known, that is, a gassho material 100 with a roof forming a gable (gassing palm shape); a ridge arranged along a girder at the top of the roof The wood 110; the purlin material 120 fixed on the gassho material 100 parallel to the ridge 110; the skylight 130 that opens and closes with the ridge 110 as the center of rotation. In addition, a structure in which a rafter material is further provided on the purlin material 120 is also known. [0003] In addition, JP-A-2002-291348 discloses a simple aggregate structure capable of maintaining the structural strength of a green...

AI Technical Summary

Problems solved by technology

[0005] However, in the related roof structure, although the strength is satisfied, the roof is formed by combining the gassho material 100, the ridge wood 110, and the purlin material 120 with the skylight support frame 140 that further supports the skylight 130. The type and quantity of aggregates increase at the same time, and its structure is complex

Therefore, there is a disadvantage that many man-hours and labor are required for assembly work at the installation site, and there is also a problem that construction costs including material costs increase due to such a situation.

In addition, these aggregates that make up the roof also have the disadvantage of blocking sunlight, causing many shadows in the greenhouse, and deteriorating the lighting performance.

[0006] On the other hand, in the aforementioned Japanese Unexamined Patent Publication No. 2002-291348, although it is described as a roof structure for a greenhouse, aggregates constituting the roof are composed of ridge wood and rafter materials, and are arranged at intervals smaller than the intervals between columns. A plurality of such rafter materials, but there is no specific description about the diameter of the rafter materials or the interval between the rafter materials, etc.

That is, in the case of simply making the space between the rafter materials smaller than the space between the columns, the space between the rafter materials is too small, which will lead to the result of deteriorating the lighting performance.

In addition, when the strength of the rafter material itself is weak, for example, even if the rafter material is made of a resin pipe or a metal pipe, but the diameter of the rafter material is small, the horizontal load in the direction of the girder, etc. can't get enough strength

In addition, in the case of using a material with a large diameter as the rafter material, the light-gathering performance is also poor due to the reduction of the space between the rafter materials.

Images