JP2001234541A - Spacers for slope protective net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide spacers for a slope protective net, which can easily check and confirm the height and the number, etc., of used spacers after spraying concrete or the like to a slope surface. SOLUTION: The spacers are for use with the slope protective net, which are placed on the slope surface to hold the protective net in a manner being spaced a predetermined interval from the slope surface. Engaging grooves 6 for engaging with part of the protective net are formed at least at two portions on the periphery of a spacer main body 1, and a spotting engaging portion 9 is formed at an upper end of the spacer main body 1. A spotting piece 10 is detachably fitted onto the spotting engaging portion 9 so as to upward protrude therefrom. The spotting piece 10 is colored, patterned, and formed depending on the height of the spacer main body 1. Then, the spacer main body 1 is inserted into a loop of the protective net, and rotated through 45 degrees about a shaft perpendicular to a plane of the protective net, whereby the engaging groove is engaged with the protective net.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope protection in which a protective net such as a wire net is floated at a predetermined height interval from a slope when spraying concrete, mortar or thick soil. More particularly, the present invention relates to a spacer for a slope protection net capable of easily inspecting and confirming a sprayed thickness of concrete or the like after construction.

[0002]

2. Description of the Related Art As a spacer for this kind of slope protection net,
Conventionally, there has been a spacer in which a metal T-shaped pin is inserted into a joint of a steel wire braided with a wire mesh, or a structure in which a bent and twisted steel wire is bitten into the joint of the steel wire. However, all of these spacers have problems such as poor workability, time-consuming mounting work, and easy falling.

Further, a V-shaped plate-shaped spacer provided with cut grooves extending from the open side to the closed side at both ends of the V-shaped open side of the plate-shaped body bent and formed into a substantially V-shaped cross section is realized. This spacer has been proposed in, for example, JP-A-3-33787, but this spacer has a problem that the engagement between the notch groove and the mesh is weak, and the spacer is easily removed from the mesh.

[0004]

In view of the above, a spacer having a structure in which a downward cut groove is formed at the center of the outer edge of the four plate pieces formed in a plate-like body having a flat cross shape, and the structure of the flat plate is formed as shown in FIG.
83045 and the like. This spacer is rotated by about 45 ° with the flat cross-shaped plate-like body placed in the mesh of the wire mesh with the piece facing the joint of the wire mesh, so that the opposite steel wire is fitted into the downward cut groove. Therefore, the spacer can be securely assembled in the mesh with a simple operation.

[0005] In this type of slope spraying method, the used protection nets and spacers are buried in the sprayed concrete or mortar. There is a problem that it is difficult to inspect and confirm the arrangement position of the (spacer height), and even after construction, the number of used spacers and the thickness of the sprayed concrete and mortar can be easily confirmed. Spacers were desired.

[0006] The present invention has been made in view of the above points, and it is possible to easily inspect and confirm the height, number, and the like of used spacers after spraying concrete or mortar on a slope. It is an object of the present invention to provide a slope protection net spacer.

[0007]

SUMMARY OF THE INVENTION A spacer for a slope protection net according to the present invention is a spacer for a slope protection net which holds a protection net on a slope at a predetermined height interval. At the lower portion, a leg portion that contacts the slope is provided, and a locking groove that engages with a part of the protection net is provided at at least two places on the outer peripheral portion of the spacer body. A mark piece is detachably fitted to the mark fitting part by protruding upward and the mark piece is given a color, pattern or shape according to the height of the spacer body. By inserting the spacer body into the eye of the protective net and rotating the spacer body about 45 degrees about an axis perpendicular to the plane of the protective net, the locking groove is locked to the protective net, and concrete, mortar, or thick soil Is sprayed on the slope, the spacer body is buried and only the Configured to output.

Here, the spacer for the slope protection net is formed by forming the spacer body by arranging four plate pieces in a cross shape, and forming a locking groove at an intermediate position between the outer edges of the plate pieces. The upper ends of the plate pieces may be formed to have a pointed cross section. Further, the mark fitting portion and the mark piece are formed to have different cross-sectional shapes from those of the spacer body having different heights, and the mark piece is fitted only to the mark fitting portion of the predetermined spacer body. It is good to be formed so that wearing is possible.

[0009]

When the height and the number of used spacer bodies are inspected and confirmed after spraying concrete, mortar, or soil, the spacers for slope protection nets having the above-mentioned structure are used in advance. A predetermined mark piece is fitted to the mark fitting portion. When spraying concrete, mortar, or the like on the slope, a protective net such as a wire net is placed on the slope, and a spacer is attached to an appropriate location to lift the protective net from the slope by a predetermined height. The spacer is inserted into the eye at an appropriate position on the protective net, turned about 45 ° about an axis perpendicular to the plane of the net, and the net wire is fitted into the locking groove and assembled. The legs of the spacer abut on the slope,
By attaching a plurality of spacers to various parts of the protection net, the protection net is held at a predetermined height interval on the slope, and in that state, concrete or the like is placed on the slope, and the protection net is filled with the protection net. Spray until it is thick enough to get only the top mark.

[0010] In the protective net, when the concrete or the like is sprayed, the spacer is securely locked in the mesh of the net.
The worker moves on the net with the spacer attached, or
Even if the net to which the spacer is attached is pulled, the attached spacer does not come off or fall off. Each spacer holds its protective net on the slope by bringing its legs into contact with the slope.

At the stage when the concrete spraying is completed,
Inspection after construction is performed, but on the sprayed surface, the mark pieces of the spacer are exposed and appear, and the color, pattern or shape according to the height of the spacer body is attached to those mark pieces The number and position of the spacers can be confirmed from the sprayed surface of concrete or the like, and the height of the used spacer body can be confirmed. The sprayed thickness of the concrete or the like can be confirmed from the height. be able to.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a slope protection net spacer, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. The spacer main body 1 is integrally formed of plastic into a shape in which two plate pieces 2 and 3 intersect at the center in a plane cross shape.

The plate 2 is slightly narrower than the plate 3, and the plate 3 is provided with a hollow 3a. On the surface of the plates 2, 3, reinforcing ribs 2a and 3b are provided. It is formed vertically and horizontally.
Further, the lower part of each of the plate pieces 2 and 3 is provided with a leg 5
Is formed. In addition, the locking grooves 6, 6 that engage with a protection net such as a wire net are formed as downward grooves at the outer peripheral portion of the plate piece 3, that is, at two places on both sides.

The locking grooves 6, 6 are formed at a position approximately half the height of the spacer body 1, and connect the protective net to the locking grooves 6, 6.
Is formed so that the height of the protection net on the slope is half of that of the spacer body 1. Further, the interval between the groove bottoms of the left and right locking groove portions 6, 6 is formed substantially the same as the interval between the meshes, and a thick portion is formed around the groove bottom for reinforcement. A retaining-preventing piece 8 for preventing the protective net from being pulled out is formed in the locking grooves 6,6.

As shown in FIG. 2, a concave portion 2 for locking the net is provided on the outer peripheral portion of the plate piece 2 where the locking grooves 6, 6 are not provided.
b is formed. Also, the upper ends 2c of the four plate pieces 2, 3
3c is formed in a pointed cross section. In this way, by forming the upper ends 2c, 3c of the plate pieces 2, 3 to have a pointed cross section, when concrete or the like is sprayed from above during construction, concrete or the like does not pile on the plate pieces 2, 3. Then, it flows down in the vicinity of the spacer, and concrete and the like can be satisfactorily poured.

Further, at the upper end of the spacer body 1, a mark fitting portion 9 is formed so as to protrude. This mark fitting portion 9
Is formed in the shape of a prism having a rectangular cross section. As shown in FIGS. 4 and 5, a fitting hole 10a having a rectangular cross section is formed at a lower portion of the mark piece 10, and the mark piece 10 is used for the mark. It can be fitted on the fitting portion 9.

A plurality of types of such slope protection net spacers are manufactured with a height of 30 mm, 50 mm, 80 mm, etc. according to the thickness of concrete, mortar, etc. sprayed on the slope. In accordance with the height of the spacer body 1, a color, a pattern or a shape is given. For example, a yellow mark piece 10 is fitted to a spacer having a height of 30 mm,
A red mark piece 10 is fitted to a spacer having a height of 50 mm, and a blue mark piece 10 is fitted to a spacer having a height of 80 mm.

An erroneous mark piece 10 may be expected to be fitted to the mark fitting portion 9 of the spacer body 1 having a different height, but in order to prevent such a problem, the mark fitting portion 9 is required. It is effective to make the cross-sectional shapes of the mark 9 and the mark piece 10 different according to the height of the spacer body 1, that is, the color and pattern of the mark piece 10.

That is, the mark fitting portion 9 of the spacer body 1 having a height of 30 mm has a square cross section, and the fitting hole 10a of the yellow mark piece 10 has a square cross section. As shown in FIG. 7, the mark fitting portion 19 of the spacer body 1 having a height of 50 mm has a hexagonal cross section, and the fitting hole 20a of the red mark piece 20 has a hexagonal cross section. , Height 8
The mark fitting portion 29 of the 0 mm spacer body 1 may have a pentagonal cross section, and the fitting hole 30a of the blue mark piece 30 may have a pentagonal cross section.

Since the mark pieces 10 are detachably fitted, there is no need to fit them when inspection / confirmation after construction is unnecessary. Can be prevented from protruding.

[0021] The slope protection net spacer configured as described above, when spraying concrete, mortar, or thick soil on the slope, applies a protection net (for example, a wire net) to be placed on the slope on the slope. On the other hand, in order to arrange them at a fixed height interval, they are used by being attached to various parts of the protection net. After spraying, inspect the height and number of used spacer bodies 1
When confirming, a predetermined mark piece 10 is fitted to the mark fitting portion 9 at the upper end of the spacer body 1 in advance.

When attaching the spacer to the protective net, first,
The spacer body 1 is put in the mesh of the net, the spacer main body is rotated about 45 degrees, and the net is pushed down. As a result, as shown in FIG. 6, a part of the protection net N enters and engages with the locking grooves 6, 6, the net is completely locked by the retaining piece 8 in the groove, and the spacer is securely inserted. It is attached to a predetermined position in the eyes of the protection net N.

Since the spacer stands on the slope by the legs 5, the protection net N is well held at a predetermined height interval on the slope. In this state, concrete, mortar, or thick layer of soil is sprayed on the slope, and concrete or the like is sprayed to a position below the mark pieces 10 to form a sprayed layer of concrete or the like to a predetermined thickness. Then, the protection net N is embedded together with the spacer at an intermediate position of the thickness of concrete or the like.

When the concrete spraying is completed,
Inspection after construction is carried out, but on the sprayed surface, the marker pieces 10 of the spacers are exposed and appear, and a color corresponding to the height of the spacer body 1 is applied to the mark pieces 10. The mark piece 1
By looking at 0, the number and position of the spacers can be confirmed.
Further, since the height of the used spacer body 1 can be confirmed, the sprayed thickness of concrete or the like can be confirmed from the height. By the way, since the marking piece 10 is merely fitted into the fitting portion 9, the marking piece 10 can be easily removed after the construction of concrete or the like.

The spacer body may be of various shapes other than the above-mentioned cross-plane shape.
For example, a locking groove may be provided on both upper sides as a cylindrical shape, or a structure in which an upper ring and a lower ring are connected by a vertical frame and locking grooves are provided on both sides of the upper ring. it can. In addition to the color, different patterns and shapes can be added to the mark pieces according to the height of the spacer body. Further, in the above embodiment, the mark fitting portion 9 of the spacer body is formed in a male shape, and the mark piece 10 has a fitting hole 10a that can be fitted thereto.
However, conversely, the mark fitting portion may be a hole and the mark piece may be a male type.

[0026]

As described above, according to the spacer for the slope protection net of the present invention, the mark pieces of the spacer are exposed on the sprayed surface when the concrete spraying on the slope is completed. The number and position of the used spacers can be confirmed from the mark pieces. In addition, since the type of the used spacer main body, that is, its height can be confirmed from the color, pattern or shape of the mark piece, the sprayed thickness of concrete or the like can be confirmed from the height.

[Brief description of the drawings]

FIG. 1 is a perspective view of a slope protection net spacer according to an embodiment of the present invention.

FIG. 2 is a front view of a slope protection net spacer.

FIG. 3 is a side view of a slope protection net spacer.

FIG. 4 is a perspective view of a mark piece.

FIG. 5 is a perspective view of a slope protection net spacer with a mark piece fitted thereto.

FIG. 6 is a perspective view of a slope protection net spacer showing a use state.

FIGS. 7A and 7B are cross-sectional views of a mark piece according to another embodiment.

[Explanation of symbols]

 1-Spacer body 2, 3-Plate piece 5-Leg part 6 Locking groove part 9-Fit part for mark 10-Mark piece

Claims (3)

[Claims] 1. A slope protection net spacer for holding a protection net at a predetermined height interval on a slope, wherein a leg portion abutting on the slope is provided at a lower portion of the spacer body to protect the protection net. Locking grooves for engaging a part of the net are provided at at least two places on the outer peripheral portion of the spacer body, and a mark fitting portion is provided at an upper end of the spacer body. A mark piece protrudes upward and is detachably fitted to the mark piece, a color, a pattern or a shape corresponding to the height of the spacer body is attached to the mark piece, and the spacer body is inserted into a protective net, By rotating the spacer body about 45 degrees about an axis perpendicular to the plane of the protection net, the locking groove is locked to the protection net,
A slope protection net spacer, wherein the spacer body is buried and only the mark pieces protrude when concrete, mortar, or thick soil is sprayed on the slope. 2. The spacer body is formed by arranging four plate pieces in a cross shape, and a locking groove is formed downward at an intermediate position between outer edges of the plate pieces. The slope protection net spacer according to claim 1, wherein an upper end of the spacer has a pointed cross section. 3. The mark fitting portion and the mark piece are formed so as to have different cross-sectional shapes from those of the spacer body having different heights, and the mark piece is fitted with a predetermined spacer body. The spacer for a slope protection net according to claim 1, wherein the spacer is formed so as to be fitted only to the joint portion.