JP3339847B2 - Windproof net support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for supporting a windbreak net in a windbreak net device for protecting, for example, agricultural products from strong winds.

[0002]

2. Description of the Related Art Windbreak nets are provided around crops and on the windward side to reduce wind power and protect crops from strong winds. In addition, windbreak nets are stretched around the greenhouse to prevent the greenhouse from being damaged by strong winds.

[0003]

However, before protecting crops and greenhouses from strong winds, the windbreak net is torn or collapsed, and as a result, the intended purpose of protecting crops and greenhouses cannot be achieved. That was often.

[0004] The reason why the windbreak net is broken by the strong wind is that there is no means for effectively releasing and weakening the wind force and preventing the windbreak net from being damaged.

[0005] The technical problem of the present invention is to focus on such a problem and to realize a structure capable of firmly supporting a windbreak net for protecting agricultural products and the like from strong winds so as not to collapse due to strong winds.

[0006]

The technical problem of the present invention is solved by the following means. Claim 1 is a structure that supports a windproof net that protects an object to be protected from a strong wind with a support, wherein a relatively high support and a low support are erected at a horizontal interval, and the low support is provided. The upper end of the column is connected to the above-mentioned high column by a horizontal beam,
The upper end of the lower support and the upper end of the higher support are connected by an oblique support.

As described above, the relatively high support and the low support are erected at a horizontal interval, and the upper end of the low support is connected to the high support by a horizontal beam. And, since the upper end of the lower strut and the upper end of the higher strut are connected by diagonal struts, when supporting the windproof net using these struts, via horizontal beams, The middle part of the high column is supported at the top of the low column.
Is lifting, the upper end of the higher strut through a diagonal strut,
Supported at the upper end of the lower column.

[0008] As a result, low columns that stand up at intervals
It can be used to support the top and middle of a tall post.

According to a second aspect of the present invention, there is provided a support structure for a windproof net, wherein the low support according to the first aspect is erected so as to be located on the side of the object to be protected. As described above, since the lower support is located on the side of the object to be protected and the higher support is located on the opposite side to the object to be protected ,
The wind bounced off the lower side of the
And is bounced over the object to be protected.
Also, the wind passing through the outer upper net is
Pushed upwards by the bounced wind on the lower side net
And is deflected above the object to be protected.
It can be prevented from reaching the object.

According to a third aspect of the present invention, the height of the high support according to the first or second aspect is about 3 m, and the height of the low support is low.
2. The height of the slab is about 1.5 m.
Or it is the support structure of the windproof net of Claim 2.
Thus, the height of the high support is about 3 m,
By the height of the lower strut is about 1.5 m, illustrated
As shown in the figure above,
Can be supported by the top of the column.

According to a fourth aspect of the present invention, the support structure of the windproof net is characterized in that the bases of the high support and the low support according to the first, second or third aspect are fixed to a concrete foundation. It is. In this way, since the bases of the high and low columns are fixed to the concrete foundation, the roots of the high and low columns are securely and firmly fixed to the concrete foundation. Collapse can be suppressed more effectively.

According to a fifth aspect of the present invention, there is provided a support structure for a windproof net, characterized in that the bases of the high support and the low support according to any one of the first to sixth aspects are driven into a field or the like.

As described above, since the bases of the high support and the low support are driven into the field, etc., the high support and the low support are used.
Can be fixed by driving it into the field, etc.
You.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment will be described as to how the support structure of the windproof net in the windproof net device according to the present invention is actually embodied. FIG. 1 is a cross-sectional view showing a use state of a windproof net device according to the present invention. Reference numeral 3 denotes an object to be protected, such as an agricultural product or a greenhouse. 1 is an upper net and 2 is a lower net.

The upper net 1 is stretched only on the upper side, not on the lower side, and the lower net 2 is stretched only on the lower side. In this manner, the upper net 1 is shifted upward with respect to the lower net 2. The upper net and the lower net are provided with a horizontal interval D therebetween.

In the illustrated example, windproof net devices L and R composed of an upper net 1 and a lower net 2 are provided so as to sandwich the object 3 to be protected from the left and right. That is, the lower net 2 is installed on the protection target side (inside), and the upper net 1 is installed on the outside.

FIG. 2 is an enlarged sectional view of the windproof net device L on the left side, and FIG. 3 is an enlarged sectional view of the windproof net device R on the right side.

1 and 2, it is assumed that a strong wind is blowing from the left side of the drawing.
By receiving or repelling the resistance by the upper and lower nets 1 and 2, the force of the wind reaching the protection target 3 is reduced, and the protection target 3 is protected from the strong wind.

The wind a bounced back on the inner lower net 2
Hits the inner surface of the outer upper net 1 and is rebounded to the upper side of the protection target 3 as shown by b. in this way,
A part of the wind blown from the outside of the wind protection net device L is repelled and deflected between the inside and outside wind protection nets 1 and 2, so that the wind force received by the wind protection net is reduced.

The wind c passing through the outer upper net 1
Is pushed upward by the above-mentioned winds a and b, and is deflected upward from the protection target object 3, so that it can be prevented from reaching the protection target object 3 beforehand.

Further, turbulence is caused by the winds a and b repelled by the lower net 2 and the wind c passing through the upper net 1, and the wind a is blown against the upper net 1 from inside. The wind which hits from the outside with respect to the upper net 1 is opposite to the wind and is offset by each other, so that the pillars of the upper net 1 can be effectively prevented from collapse.

The lower net 2 does not generate wind acting in the opposite direction as described above. However, since the lower net 2 is installed at a low position, its supporting columns are short, the wind is less likely to receive wind, and the resistance is reduced. It is hard to collapse because of its great power.

Since the windproof net is divided into upper and lower parts like the upper net 1 and the lower net 2, the force acting on the struts of each net is also divided into two, and it is possible to reduce the force by half. It can contribute to prevention of collapse.

As shown in FIGS. 1 and 3, the right windshield net device R installed at a position facing the left windshield net device L mainly includes the outer upper net 1 on the left side (to be protected). ) Blows the wind d. A part of the wind d passes through the net 1 and goes out as shown by e, while the remaining part is repelled as f and hits the outer surface of the inner lower net 2 to form g. And flows out through the upper net 1 to the outside.

As described above, the wind f blown from the object 3 to be protected and repelled to the upper net 1 is directly repelled to the object 3 to be protected in the case of a conventional windbreak net. Although the target object was damaged, in the case of the present invention, it is bounced again by the lower net 2 and escapes outward as indicated by g, so that the wind force hitting the protection target object can be significantly reduced.

4 to 6 are diagrams specifically illustrating a support structure of the windproof net devices L and R. FIG. 4 is a longitudinal sectional view, FIG. 5 is a diagram viewed from the outside, and FIG. FIG.

Since the inner lower net 2 is installed at a low position, its support 4 is also low, for example, about 1.5 m is suitable. On the other hand, since the outer upper net 1 is installed at a high position, its support 5 is also higher than the support 4, for example, about 3 m is suitable. The columns 4 and 5 may be fixed by driving into a field or the like, or a foundation may be constructed with concrete or the like, and the lower ends of the columns 4 and 5 may be embedded and fixed in the foundation.

The upper end of the support 4 of the lower net 2 is connected to the support 5 of the upper net 1 by a beam member 6. The lower end of the support 4 is connected to the support 5 of the upper net 1 by a beam member 7. The upper and lower beam members 6 and 7 are minimum necessary, and a beam member may be further added in the middle and connected. Note that the horizontal distance D between the inner and outer nets 1 and 2 is freely set depending on the length of these beam members, and for example, about 1 m is suitable.

The upper end of the support 5 of the upper net 1 and the upper end of the support 4 of the lower net 2 are connected by an oblique support 8. The inner and outer struts 2 and 5, the beam members 6, 7 and the oblique struts 8 are installed at a predetermined interval, for example, at an interval of about 3 m, as shown in FIGS.

As shown in FIG. 5, the support 5 of the upper net 1
A girder member 9 that supports the upper edge of the upper net 1, a girder member 10 that supports the lower edge, and a girder member 11 that supports the middle of the upper net 1 are horizontally passed between the five members, and are connected by bolts and nuts. ing. The girder member 12 is also provided and connected between the lower ends of the columns 5 as necessary.

Then, as shown in FIG. 4, in a greenhouse or the like, the upper net 1 is attached to each of the girder members 9, 10 and 11 by a known fixing means 16 used for fixing a net or a vinyl sheet. By being supported, it is stretched in the longitudinal direction of the girder member.

As shown in FIG. 6, the support 4 of the lower net 2
A girder member 1 supporting the upper edge of the lower net 2 between the four
3. A girder member 14 for supporting the lower edge and a girder member 15 for supporting the middle are horizontally passed and connected with bolts and nuts. Then, the lower net 2 is attached to and supported by each of the girder members 13, 14, and 15 by the known stopper means 16 of FIG. 4, so that the lower girder members are stretched in the longitudinal direction of the girder members.

The columns 4, 5 and the beam members 6, 7, the diagonal columns 8,
For the girder members 9 to 15, a metal round pipe, square pipe, angle material, or the like is suitable. The connecting means between them may be bolts and nuts, but a connecting tool dedicated to pipes or the like may be used.

FIG. 7 is a plan view illustrating various installation positions of the windproof net device. In (1), the upper net 1 and the lower net 2 are stretched so as to surround the entire outer periphery of the protection target 3. In (2), the upper net 1 and the lower net 2 are stretched only on both sides of the object 3 to be protected.

When the wind direction of the strong wind is constant, for example, in a mountain area, the upper net 1 and the lower net 2 can be stretched only on the windward side of the object 3 to be protected. is there. Further, it can be installed in an L shape or a U shape.

(3) is the same as that of (2),
The windproof net device consisting of the upper net 1 and the lower net 2 is stretched so as to sandwich the windshield, and a single row of the windproof net device consisting of the upper net 1 and the lower net 2 is installed between the two windproof net devices. It is. When the protection target 3 is spread over a wide area, it is more effective to install the windproof net device in the area of the protection target 3 as described above.
In addition, it is also possible to install two or more rows of windproof net devices in the area of the object to be protected.

In (4), a windproof net device including an upper net 1 and a lower net 2 is installed so as to surround the outer circumference of the protection target 3 as in (1). It is installed in a cross shape. Thus, the upper net 1
The installation position of the windproof net device consisting of
It can be set arbitrarily according to the terrain and wind direction.

When installed in the object 3 to be protected, the upper net 1 and the lower net 2
However, a structure in which the lower nets 2 are disposed on both sides of the upper net 1 at a distance D from the upper net 1 as shown in FIG. 1C is suitable.

FIG. 8 is a cross-sectional view for explaining the operation of reducing the wind force in the embodiment in which the lower net 2 is installed on both sides as described above. Now, assuming that a strong wind h is blowing from the left side of the figure, first, it hits the upper net 1 and rebounds like i, then rebounds to the lower net 2 on the left side like j, and further on the ground like k. It bounces off and goes up. In addition, the wind is decreasing during the rebound.

The wind m blown from the upper net 1 is diverted upward by the upward wind k. Therefore, the wind n passing through the lower net 2 on the left side and the wind o passing through the lower net 2 on the right side are significantly reduced in wind power, and can effectively protect the protection target. 1 and the left and right lower nets 2, 2 can be prevented from being damaged.

The material of the windproof nets 1 and 2 in the present invention is not particularly limited, but a net made of a commercially available synthetic resin is suitable. In addition, when the windproof net device of the present invention is installed around a greenhouse growing crops, it is possible to prevent the greenhouse from being damaged by strong winds. Can also be protected from In addition, it can be applied to all items that need to be protected from strong winds, such as barns and temporary sheds.

[0042]

According to the first aspect, the relatively high columns and the low columns are erected at horizontal intervals,
Since the upper end of the lower support is connected to the higher support by a horizontal beam, and the upper end of the lower support and the upper end of the higher support are connected by an oblique support, these when supporting the windbreak nets using a strut, via a horizontal direction of the beam, the middle portion of the high post lower supporting
It is supported at the upper end of the column, and the upper end of the higher column is supported at the upper end of the lower column via an oblique column .

As a result, the low columns that are
It can be used to support the top and middle of a tall post.

According to the second aspect of the present invention, since the low support is located on the side of the object to be protected and the high support is positioned on the opposite side to the object to be protected, the inner lower net is
The bounced wind hits the inner surface of the outer upper net,
It is bounced over the object to be protected. Also, the outer upper thread
The wind passing through the nets bounces off the inner lower net.
Is pushed up by the wind
To the protected object.
Can be prevented.

According to a third aspect of the present invention, the height of the high support is 3 m.
And the height of the low support is about 1.5 m , as shown in FIG.
And the upper end can be supported by the upper end of the lower column.

According to a fourth aspect of the present invention, the bases of the high support and the low support are fixed to the concrete base, so that the bases of the high support and the low support are securely and firmly fixed to the concrete base. Therefore, the collapse of the windproof net can be suppressed more effectively.

According to the fifth aspect, since the bases of the high support and the low support are driven into the field, the high support and the low support are used.
The base of the pillar can be fixed by driving it into the field
it can.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a use state of a windproof net device according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the windproof net device on the left side.

FIG. 3 is an enlarged cross-sectional view of the right windproof net device.

FIGS. 4 to 6 are diagrams illustrating a specific support structure of the windproof net device, and FIG. 4 is a longitudinal sectional view.

FIG. 5 is a diagram of the upper net side of the windproof net device as viewed from the outside.

FIG. 6 is a diagram of the lower net side of the windproof net device as viewed from the inside (the protection target side).

FIG. 7 is a plan view illustrating various installation positions of the windproof net device.

FIG. 8 is a schematic cross-sectional view illustrating a wind power reducing operation in an embodiment in which a lower net is installed on both sides of an upper net.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper net (outer net) 2 Lower net (inner net) 3 Protected object L Left windproof net device R Right windproof net device C Windproof net device in a protected object 4 Prop supporting lower net 5 Upper Posts that support the net 6, 7 Beam members 8 Diagonal posts 9-14 Girder members

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01G 13/00

Claims (5)

(57) [Claims] 1. A structure for supporting a windproof net that protects an object to be protected from a strong wind with a support, wherein a relatively high support and a low support are erected at a horizontal interval. The upper end of the support is connected to the higher support by a horizontal beam, and the upper end of the lower support and the upper end of the higher support are connected by an oblique support. Windproof net support structure. 2. The support structure for a windproof net according to claim 1, wherein the low support is erected so as to be located on the side of the object to be protected. 3. The height of the high support is about 3 m.
The support structure for a windproof net according to claim 1 or 2 , wherein the height of the low support is about 1.5 m . 4. The support structure for a windproof net according to claim 1, wherein the roots of the high support and the low support are fixed to a concrete foundation. 5. The support structure for a windproof net according to claim 1, wherein the roots of the high support and the low support are driven into a field or the like.