JPH022214Y2 - - Google Patents

Description

[Detailed explanation of the idea] 《Industrial application field》 This invention relates to a support device for a windbreak net.

[Conventional technology and problems] Windbreak nets installed around orchards in relatively windy regions and rice fields in regions affected by cool winds such as easterly winds promote crop growth and increase yields. It plays an important role in making this happen.

By the way, as a support device for a windbreak net, a device as shown in FIG. 5 has conventionally been used.

The support device shown in the figure consists of central pillars 1 erected at predetermined intervals, such as steel pipes or fiber reinforced synthetic resin (FRP) pipes, and corner pillars 2 erected at both ends at an angle. , a plurality of wires 3, 3 which are anchored to the middle pillar 1 and stretched horizontally with both ends fixed to the corner pillars 2, an anchor material 4 outside the corner pillar 2, and a turnbuckle for adjusting the length. It is generally composed of a support wire 6 stretched through a support wire 5.

A flat pedestal 7 is fixed to the lower end of the corner post 2 and buried in the ground, and the windbreak net 8 is locked to the wire 3.

However, such conventional support devices have the following problems.

That is, the windbreak net 8 is supported by the middle pillars 1, which have approximately 1/4 of their total length buried in the soil, the corner pillars 2 to which the pedestals 7 are fixed, and the support wires 6 to which the anchor materials 4 are buried. However, if strong winds blow against the windbreak net 8, there is a risk that the pillars may bend or undergo plastic deformation such as bending, making it impossible to repair, collapsing, or floating if the structure is made of only rigid central pillars such as steel pipes. Ta.

On the other hand, the middle column has flexibility and elastic recovery.
When using only FRP pipes, the middle pillars will flex and deform considerably depending on the wind acting on the windbreak net.
As a result, the wind escapes upward, and the ground is resistant to wind, but due to repeated bending and deformation of the ground in which the middle pillars are buried, the gap between them and the middle pillars expands, creating large holes. The installation force against the center pillars decreases, causing the entire windbreak net to tilt, and each center pillar becomes randomly installed with respect to its direction, resulting in complex problems associated with these deformations. There are problems such as floating due to force acting on the corner pillars, and although it does not lead to situations such as breakage of the center pillar and making it impossible to repair after the fact, in order to prevent this floating, it is necessary to It was necessary to take measures such as hardening the foundations of the pillars with concrete to strengthen them, which increased construction costs and made it difficult to dismantle and remove the pillars when they were not needed.

It is also possible to strengthen the supporting force by stretching the support wires 6 on both sides perpendicular to the windbreak net 8, but with this method, the support wires 6 may protrude outside the site and become a hindrance to traffic and work. , which will affect crop planting.

《Purpose of the invention》 This invention was made in view of the conventional problems mentioned above, and its purpose is to:
To provide a windbreak net support device with extremely low risk of collapse or floating even under strong winds.

[Structure of the device] In order to achieve the above object, this device has a rigid center column that is erected at a predetermined interval so as to sandwich a flexible center column, and a pair of rigid corner columns that are erected at both ends. , it is characterized by comprising a plurality of stays fixed to the corner post, and a plurality of wires hooked to the center post, both ends of which are fixed to the corner post, and stretched in the horizontal direction.

<<Embodiments>> Hereinafter, preferred embodiments of this invention will be described in detail with reference to the accompanying drawings.

1 to 4 show an embodiment of the windbreak net support device according to this invention.

Figure 1 shows the overall structure of the windbreak net support device.
0, a pair of rigidity units erected at both ends of the middle pillar 10,
For example, a corner post 11 made of a steel pipe, a plurality of stays 12 fixed to the corner post 11, and a plurality of stays 12 fixed to the center post 10 via a hook bolt 13, with both ends connected to the corner post 11 via a turnbuckle 14 and a hook bolt 13.
1 and a plurality of wires 15 stretched in the horizontal direction, and the windbreak net is secured to these wires 15.

The middle pillar 10 is made of, for example, a flexible middle pillar 10a made of FRP and a rigid middle pillar 10b made of a steel pipe,
The rigid middle pillars 10b are arranged to sandwich the plurality of flexible middle pillars 10a, and the plurality of flexible middle pillars 10a at the ends are sandwiched between the corner pillars 11 and the middle pillars 10b.

The stay 12 includes a first stay 12a provided via a pedestal 16 between the corner post 1 and a flexible middle post 10a at the end, and a second stay 12a provided outwardly and perpendicular to the corner post 11. It consists of a stay 12b and a stay 12b.
Reinforcing material 1 is installed between a, 12b and corner post 11, respectively.
7 and 17 are provided, and the corner post 11 and the second
The lower ends of the stays 12b are each fitted with a pedestal 16 and buried in the soil.

In addition, at the upper end of each pillar 10, 11, there is a cap 1.
8 is fitted, and at least the rigid pillars (corner pillars 11 and rigid middle pillars 10b) of the uppermost wire 15
A spring material 19 is appropriately interposed in a portion where the flexible middle pillar 10a and the flexible middle pillar 10a are adjacent to each other.

Furthermore, a feather-shaped root shank 20 is fitted and buried in the lower end of the rigid middle pillar 10b.

Details of the feather-shaped root skein 20 are shown in FIGS. 2 to 4.

The base plate 20 shown in the figure is the curved plate 2 shown in the second figure.
0a, three anti-tilting plates 20b, and two anti-sinking plates 20c, and each member is made of a metal material such as a steel plate.

One curved plate 20a has a circumferential surface of the middle pillar 10b.
It includes a curved portion 20d that covers only 120 degrees, and a small mounting plate 20e continuous to both sides of the curved portion 20d. The mounting plate 20e is formed in a radial direction with a distance of 120° from the center of the arc of the curved portion 20d. There are two bolt holes 20f on the mounting plate 20e.
2 is formed at the base of the tilt prevention plate 20b.
20 g of bolt holes are formed. The height of the tilt prevention plate 20b is larger than that of the mounting plate 20e, and a slit 20h is formed horizontally from the end at the center portion dividing the height into two.

The anti-sinking plate 20c is a substantially semicircular donut plate, and a coupling margin is provided at both ends thereof, and a bolt hole 20i is formed in the coupling margin.
The inner and outer diameters of the subsidence prevention plate 20c are approximately equal to the distance from the arc center of the curved portion 20d to the inner end of the slit 20h and the distance to the outer edge of the tilt prevention plate 20b. Further, the thickness of the subsidence prevention plate 20c is slightly smaller than that of the slit 20h.

To assemble the base 20, as shown in FIG. 3, combine the three curved plates 20a, and
Let d form one cylinder. At this time, the tilt prevention plate 20b is sandwiched between the mounting plates 20e of the three curved plates 20a, and the bolt holes 20
f, 20g, and this matched bolt hole 2
Attach the bolt/nut 20j to 0f and fix them together. As a result, the three curved plates 20a and the tilt prevention plate 20b are integrally assembled.

Next, in the assembly of the curved plate 20a and the tilting prevention plate 20b, insert the two sinking prevention plates 20c into the slits 20g of the tilting prevention plate 20b, and connect the two ends of the two sinking prevention plates 20c with the joining allowance. They are stacked one on top of the other, the bolt holes 20i are aligned with each other, and bolts and nuts 20j are attached thereto to integrally connect the two. At this time, the sinking prevention plate 20c is the tilting prevention plate 2.
Orthogonal to 0b.

As shown in FIG. 4, the curved portion 20d,
A rigid central column 10b is provided in the cylindrical portion consisting of 20d and 20d.
By inserting the lower end portion of the inner column 10b and fixing it by tightening the tightening margin or interposing an elastic sheet, for example, the inner column 10b is fixed.
Three anti-tilting plates 20b are arranged vertically in the radial direction of the plate, and the anti-sinking plates 20c are arranged horizontally so as to span between the anti-tilting plates 20b. By burying this root cage 20 in the soil, the middle pillar 10b becomes self-supporting, and the sinking prevention plate 20c effectively prevents the middle pillar 10b from sinking, and the tilting prevention plate 20b and the sinking prevention plate 20c Thus, tilting of the center pillar 10b is effectively prevented.

Furthermore, the root shackles 20 can be disassembled, stored, and transported when not in use. A large number of curved plates 20a and subsidence prevention plates 20c can be stacked and stored in a very high density, thereby reducing transportation costs and storage costs.

Note that the mounting plate 20e of the curved plate 20a of the root shank 20 and the tilt prevention plate 20b may be integrally formed, and the root shank 20 may be constructed from two parts. They may be connected as one body, and this portion may be a cylindrical portion into which the middle pillar 10b is inserted. Further, the number of component parts of the base and the number of holes in their connecting parts are not limited to the above-mentioned numbers, but may be determined by taking into consideration the effect of erecting and the number of man-hours during assembly.

Now, in the case of the windbreak net support device having the above configuration, when the windbreak net is hit by a strong wind, the part of the windbreak net stretched over the middle pillar 10a made of flexible FRP pipe will Since the middle pillar 10a is flexible, it tilts and displaces according to the wind, making it easier for the wind to escape upwards, and in combination with the elastic recovery of the middle pillar 10a, the horizontally stretched wire 15 The middle pillars 10b are observed to move in the lengthwise direction of the tensioning as if they were undulating, and the middle pillars 10b are disposed as appropriate so that they are resistant to strong winds and are more rigid. By doing so, overload on the corner pillars 11 can be reduced and holes in the ground caused by excessive bending and deformation of the FRP middle pillars 10a can be prevented.

The wind resistance due to the structure of the middle pillar 10a having flexibility and elastic recovery can be explained by the following example.

That is, the rigid corner pillar 11 and the FRP middle pillar 10a
In a windbreak net facility constructed by
As a result of being in a state where there is no deflection displacement, these middle columns and reinforcing bars will come out of the ground under strong winds.
This resulted in damage to the windbreak netting equipment.

This is thought to be because the wind escaping directly upward along the windbreak mesh surface perpendicular to the main direction of the wind creates a depressurized state and exerts a force in the direction of pulling out the center column, causing the center column to become rigid. When composed of pillars, the phenomenon of lodging against the direction of the wind is also observed.

In addition, in the windbreak net support device according to the present invention, the rigid middle pillar 10b made of steel pipe or the like is arranged in the middle.
It is buried in a free-standing manner by means of a fletching-shaped root shank fitted to its lower end, and the force exerted by the wind is dispersed by the FRP middle pillar 10b located in the middle, resulting in bending, collapse, etc. is prevented.

In addition, the wire stretched horizontally should be placed at the corner post 1.
Since it is sufficient to use a diameter suitable for the tension taking into account the distance between 1 and the rigid middle pillar 10b, the diameter can be thinner than when the rigid middle pillar 10b is not used as in the past, and the material cost can be reduced. .

In addition, the corner posts 11 are supported by a plurality of stays 12, and the rigid middle posts 10b are prevented from collapsing or floating up by the feather-shaped root vases 20, so that the windbreak net can be supported even more firmly.

Furthermore, at least the topmost wire 15,
Since the spring material 19 is appropriately interposed, the wind blows on the windbreak net, and the upper end portion of the flexible middle pillar 10a curves, allowing the wind to pass upward, and then returns to its original state due to its elastic force. In this case, the spring material 19 acts to prevent extreme curvature of the flexible middle column 10a and promote upward passage of wind and recovery.

Furthermore, of the stays 12a and 12b, only the second stay 12a is located outside the site,
There is almost no problem with traffic.

The number of rigid columns, that is, the rigid corner columns 11 and the rigid middle columns 10b, or the number of flexible middle columns 10a arranged between the rigid middle columns 10b, is determined based on the physical properties of each column, wind resistance against expected wind speed, etc. Approximately 14 pieces are appropriate, but the number is not limited to this.

<<Effects of the invention>> As explained above in detail in the examples, the windbreak net support device according to this invention prevents the windbreak net from collapsing or floating up without using permanent support such as a concrete foundation. Moreover, the site can be used effectively and other excellent effects can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an overall view showing one embodiment of this invention, Fig. 2 is a perspective view of the components of the nekase, Fig. 3 is a top view showing the assembled state of the nekase, and Fig. 4 is a middle view of the nekase. It is a perspective view attached to a pillar. FIG. 5 is an explanatory diagram of a conventional windbreak net support device. 10... Middle pillar, 11... Corner pillar, 12... Stay, 13... Hook bolt, 14... Turnbuckle, 15... Wire, 16... Pedestal, 17...
...Reinforcement material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Rigid middle pillars erected at predetermined intervals so as to sandwich the flexible middle pillars, rigid corner pillars erected at both ends, and fixed to the corner pillars. A windbreak net support comprising: a plurality of stays, and a plurality of wires, which are anchored to the flexible and rigid center pillars, fixed at both ends to the corner pillars, and stretched horizontally. Device. (2) The rigid center column includes a cylindrical portion that partially surrounds the lower end of the center column, a plurality of tilt prevention plates that protrude radially from the cylindrical portion, and a plurality of anti-tilt plates that extend around the cylindrical portion. The windbreak net support device according to claim 1, which is a utility model, and is characterized in that the windbreak net supporting device is embedded by fitting a root cage having a subsidence prevention plate attached perpendicularly to the tilting prevention plate. (3) The windbreak net supporting device according to claim 1 or 2, wherein the wire has a spring material interposed at least in its uppermost portion.