JPS588155A - Victoria lawn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cheesecloth placed above a plant growing field such as a tea plantation, a cedar nursery, a tank field, or a field in a greenhouse.

- The object is to provide a heavy cheesecloth whose light-shielding rate changes depending on the direction of sunlight, similar to the case where conventional cheesecloth is double-layered.

With conventional cheesecloth, the shading rate is determined by the thickness of the weft threads, so in order to increase the shading rate during the daytime when the amount of solar radiation is high and to lower the shading rate in the morning and evening when the amount of solar radiation is low, the cheesecloth is double-strung. The method used is to arrange the wefts of both cheesecloth alternately in plan view, and the tensioning structure is complicated, and the tensioning work requires a lot of effort and cost. The problem is that it is extremely difficult to accurately position the cheesecloth so that the weft threads are arranged alternately in plan view.

However, since a large number of pieces of cheesecloth are to be strung up, it is necessary to use thick and strong pillars and struts, and the problem is that the struts and struts are heavy and difficult to handle, and the material costs are high.

The present invention has been made in view of the above-mentioned circumstances, and in order to provide a system that can ideally change the shading rate depending on the solar radiation direction with heavy tensioning, and that can solve the above-mentioned problems. A plurality of warp pairs are arranged at appropriate intervals in the weft direction, and each warp pair includes a weft group and an upper thread and a lower thread woven in a double-twisted weave. The main feature is that the adjacent weft yarns are alternately twisted in opposite directions by tension to make them stick out in the front and back directions, and a variable light-shielding area is formed between each pair of warp yarns, where each weft yarn is arranged in a staggered pattern. be.

An embodiment of the present invention will be described below based on the drawings.

The cheesecloth shown in Figures 1 to 3 consists of one group of weft yarns made of synthetic resin flat yarns colored in a color chosen by one crop, such as black or orange, and arranged at appropriate intervals in the weft direction. Each warp pair 2 consists of an upper thread 6 and a lower thread 4 made of flat yarn of the same color as the weft thread 1, and the upper thread 3 and the lower thread 4 are twisted together with the first group of weft threads. Weave in a tangled weave. In this case, the twisting directions of adjacent warp pairs 2 are alternately twisted in opposite directions.

After weaving the cheesecloth 1 For example, when stretching the cheesecloth,
When warp pair 2 is tensioned, each weft thread 1.

Adjacent weft yarns 1 are alternately twisted in opposite directions to extend out in two layers, front and back, and a light-shielding rate variable portion 5 in which weft yarns 1 are arranged in a staggered manner is formed between each pair of warp yarns 2.

If tension is applied to the weft threads, it will become ti(, become).

Furthermore, the higher the stiffness of the weft, the greater the amount of overhang of the weft, and the thicker the upper thread or lower thread, the greater the amount of overhang of the weft. When the cross section of the upper thread or lower thread is made flat, seven times more overhang can be obtained despite having a small cross-sectional area and being lightweight.

In this example, the distance between each warp pair 2 in the weft direction is 2 to 10
Good results were obtained when using cIn.

If this interval is too small, the amount of overhang of the weft threads will be reduced, and if it is too large, the weft threads will be pushed to one side in the middle part of the light-shielding rate variable part due to the weight of the fields and rainwater, which will defeat the purpose of the present invention. become unable to reach. It is thought that this range naturally varies depending on the materials of the weft and warp pairs.

4 and 5 show another embodiment of the present invention.

This means that each warp pair 2 is twisted in the same direction, and the warp pair 2 is twisted in the same direction.
With the tension of
Two light shielding rate variable parts 5 are formed between them. The other configurations are the same as in the previous example.

In each of the above-mentioned embodiments, it is optional to weave pairs of narrow warp yarns close together in the areas near the edges on both sides of the cheesecloth to more reliably prevent the weft yarns from falling off or shifting in the warp direction.

Further, the upper thread and the lower thread are not limited to flat yarns, but may be of filament thread, twine, resin wire, etc., as long as they are small in elongation and have a sufficient thickness and shape to make the weft threads protrude from the front and back sides.

As mentioned above, the present invention uses tension between the warp pairs.

Adjacent weft yarns are alternately twisted in opposite directions to make them stick out in the front and back directions, forming a variable shading rate section in which the weft yarns are arranged in a staggered pattern, so the degree to which the shadows of the weft threads in the variable shading rate section overlap changes depending on the direction of sunlight. The shading rate changes accordingly. Moreover, this change in shading rate is ideal: during the daytime when the amount of daily solar radiation is high, the shadows of the weft threads overlap with each other, resulting in a high shading rate, and in the morning and evening, when the daily amount of solar radiation is low, the shadows of the weft threads overlap with each other, resulting in a low shading rate. This will be a major change.

In addition, it is possible to obtain an ideal change in shading rate with heavy tension installation.
Compared to conventional products that require double tensioning, the tensioning structure is simpler and requires less effort for tensioning.

The cost is low, and since the weft threads are precisely arranged in a staggered manner, ideal changes in the light shielding rate can be achieved without much effort. In addition, the amount of cheesecloth needed is half that of double-strung construction, making the struts and struts thinner and lighter in weight, making them easier to handle, and the cost of materials can be extremely low.

Furthermore, since the weft threads are arranged in a staggered manner in the variable shading rate section,
Since the gap between the weft yarns is larger than that in plan view, 1. ventilation and rain permeability are improved, wind pressure and rainwater load are reduced, and the struts and struts can be made thinner and lighter, making them easier to handle. It can be done cheaply.

In addition, the rate of change in the shading rate can be adjusted by adjusting the tension of the weft and warp, for example, during tensioning, which does not require any special effort.
There is also the advantage that production costs such as quality of workmanship are almost the same as conventional products.

[Brief explanation of drawings]

1 to 3 show one embodiment of the present invention. FIG. 1 is a plan view of the cheesecloth in the warp relaxed state. Figure 2 is a longitudinal cross-sectional view of cheesecloth in warp tension contraction. FIG. 3 is a sectional view taken along the line A--A in FIG. 2. FIGS. 4 and 5 show another embodiment of the present invention, in which FIG. 4 is a plan view of the cheesecloth in a progressively relaxed state, and FIG. 5 is a longitudinal sectional view of the cheesecloth in a warp tensioned state. 1. Weft, 2. Warp pair, 5. Upper thread, 4.
Lower thread, 5... Light-shielding rate variable part. Patent applicant Sueda Shoji Co., Ltd.

Claims (1)

[Claims] 1. It comprises a group of weft yarns and a plurality of pairs of warp yarns 2 arranged at appropriate intervals in the weft direction, each pair of warp yarns 2 having a group of weft yarns, an upper yarn 3 and a lower yarn woven in a twisted weave with two twisted yarns. A light-shielding method in which the tension of each warp pair 2 alternately twists the adjacent weft yarns 1 in opposite directions and overhangs them in the front and back directions, and the weft yarns 1 are arranged in a staggered manner between each warp pair 2. Cheesecloth characterized by forming a rate variable part 5