JP2003336263A - Covering block unit of construction face - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a covering block unit having a number of blocks connected to a net, in which environmental pollution due to rust is prevented by imparting corrosion resistance to a net, a retaining member for connecting the covering block to the net, and a connecting means. <P>SOLUTION: A synthetic resin cylindrical anchor 7 is internally provided in a preliminary hole 11 with the bottom formed in the covering block 3. Meanwhile, the net 2 is made of a synthetic resin, the retaining member 6 insertedly hooked in the longitudinal wire materials 4 and the breadthwise wire materials 5 is made of a synthetic resin, further, the member 6 is fastened to the block 3 by screwing the cylindrical anchor 7, and the retaining member 6 is joined with the covering block 3. A headed bolt 9 for connecting the block 3 to the net 2 with the member 6 is made of a synthetic resin. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction block lining block unit in which a large number of lining blocks are arranged on the upper surface of a net and each lining block is connected to the net through an anchor. To the connection structure of each lining block to.

[0002]

2. Description of the Related Art JP-A-11-158839 and JP-A-20
No. 00-192467 discloses a construction surface lining block unit in which a large number of lining blocks are arranged on the upper surface of the net and connected to the net. In this prior example, headless bolts are previously attached to the lining block. The erection block is erected upright, and a nut is screwed into this to fasten a towing tool that hangs around a meridian wire or a weft wire material of the net, and the lining block is connected to the net through the towing tool.

More specifically, in this prior art example, the headless bolt is inserted into the tubular anchor in advance so that the enlarged diameter portion of the tip end thereof projects from one end of the tubular anchor and the male screw portion at the other end. Is placed so as to project from the other end of the tubular anchor, and the tubular anchor with the headless bolt inserted therein is inserted into the bottomed pilot hole provided in the lining block, and then the tubular anchor is attached to the bottom of the bottomed pilot hole. The expanded diameter portion is press-fitted into the tubular anchor to forcefully open the split claw piece of the tubular anchor, and the tubular anchor is engaged and coupled to the inner wall of the bottomed prepared hole.

As a result, in the headless bolt, the expanded portion at one end is press-fitted into the tubular anchor, and the male screw portion at the other end is preliminarily formed so as to project from the opening of the bottomed pilot hole, that is, the surface of the lining block. To be done.

On the other hand, the pulling tool is passed through the weft wire or the meridian wire of the net, and the male screw portion is inserted into the bolt through hole provided in the central portion of the pulling tool, and the nut is inserted into the male screw portion from the lower surface side of the net. And the seating surface of the nut is brought into contact with the lower surface of the retainer by the screwing, and the retainer is tightened between the nut seat surface and the lower surface of the lining block to connect the lining block to the net. I am trying.

[0006]

However, in the above-mentioned prior art example, since the headless bolt is formed so as to project from the lower surface of the lining block in advance, damage or inclination of the bolt thread due to external impact occurs. In addition, since the cylindrical anchor is driven into the inner bottom of the prepared hole limited by the headed bolt and press-fitted to the outer peripheral surface of the expanded portion of the headless bolt,
There is a problem that the connecting claw of the split claw piece of the tubular anchor is deformed by the inner wall of the prepared hole at the time of this driving, and the biting force against the inner wall is reduced.

The lining block is extremely heavy,
Since a lining block unit that can carry a large number of lining blocks is hung by a crane and laid on the construction surface, a strong and highly reliable connection between each lining block and the net is required. The above-mentioned prior art has a problem that the above-mentioned binding force is lowered and is harmful to safety.

[0008] In addition, these lining block units are often laid on the construction surface near the coast, harbor, and estuary,
Not only the net, but also the tubular anchor, the retainer, the headless bolt, and the nut are rusted due to aged deterioration, and the rust flows out to the surroundings to pollute the environment.

In all of the above-mentioned prior art examples, since the net, the tubular anchor, the retainer, the headless bolt and the nut are all made of metal, the problem of environmental pollution is inherent.

Further, the progress of rust due to the aged deterioration causes a loss of the binding force of the block to the net, and there is a possibility that the lining block may slip off the construction surface (slope).

[0011]

SUMMARY OF THE INVENTION The present invention provides a lining block unit for a construction surface that appropriately solves the above problems.

In the lining block unit according to the present invention, a cylindrical anchor made of synthetic resin is internally provided in the prepared bottomed hole provided in the lining block, and the net is made of synthetic resin.
Synthetic resin is used as a retractor to be threaded through the meridian or weft wire of the net, and is further screwed to the tubular anchor to connect the retainer to a lining block and at the same time to perform lining through the retainer. The headed bolt that connects the block to the net is made of synthetic resin.

The tubular anchor has a split claw piece on the inner end side that is expanded by press-fitting the anchor pin to the inner end side of the anchor pin so as to connect with the inner wall of the bottomed pilot hole, and has a female screw tubular portion on the outer end side. It has a structure in which

On the other hand, an anchorage having an upper hanging plate hanging on the upper surface of the net and a lower hanging plate hanging on the lower surface of the net, and having a bolt through hole penetrating the upper hanging plate and the lower hanging plate. A tool, a headed bolt in which a male screw shaft portion and a bolt head are integrally formed are prepared.

While inserting the male screw shaft portion of the headed bolt from the lower surface side of the net into the bolt through hole of the retainer, the male screw shaft portion is screwed into the female screw cylinder portion of the tubular anchor to engage the inner end surface of the male screw shaft portion and the anchor. A structure in which the outer end faces of the pins are opposed to each other, and the upper hanging plate and the lower hanging plate are tightened between the seat surface of the bolt head and the lower surface of the lining block by the screwing to connect the lining block to the net. It was done.

The net is made of synthetic resin, for example, a synthetic resin single wire (monofilament) or a synthetic resin fiber (multifilament) focusing wire is used as a warp wire and a weft wire. Alternatively, a glass fiber-converged wire or a carbon fiber-converged wire is used as a meridional wire and a weft wire, and these are latticed to form a net.

The synthetic resin single wire or synthetic resin fiber is preferably a polyester single wire or polyester fiber.

Further, the retractor, the tubular anchor as the connecting means and the headed bolt are all made of synthetic resin. If a washer is used on the head bearing surface of a headed bolt, this too shall be made of synthetic resin. The anchor pin that is press-fitted into the tubular anchor is also made of synthetic resin.

The anchor pin that can be press-fitted into the tubular anchor has a true cylindrical shape and has a tapered portion at the inner end. Before the screwing of the headed bolt, the anchor pin is driven to the inner depth of the bottomed pilot hole (the inner end side of the bottomed pilot hole), that is, the inner depth of the tubular anchor, or of the tubular anchor. Temporarily press-fit and place halfway, and by screwing a headed bolt into the female threaded cylindrical part, the male screw shaft part presses the anchor pin and presses it into the inner part of the cylindrical anchor, and the split claw of the cylindrical anchor Holds the connection to the inner wall of the bottomed pilot hole by the forced expansion of the piece.

The inner end surface of the male screw shaft portion of the headed bolt and the outer end surface of the anchor pin face each other in a close state to regulate the anchor pin. Or, the inner end surface of the male screw shaft portion of the headed bolt and the outer end surface of the anchor pin are brought into contact with each other,
Restrict anchor pins.

The retractor has a pair of upper hanging plates which are bent in a relative direction from the left end and the right end of the lower hanging plate so as to be parallel to the lower hanging plate and which are hung on the upper surface of the net. The pair of upper hanging plates are superposed on each other on the upper surface of the net, and the bolt through holes are provided in the overlapping portions of the upper hanging plates and the lower hanging plate.

Alternatively, the retractor has a pair of lower hanging plates bent in a relative direction from the left end and the right end of the upper hanging plate so as to be parallel to the upper hanging plate and hanging on the lower surface of the net. The pair of lower hanging plates are overlapped with each other on the lower surface of the net, and the bolt through holes are provided in the overlapping portions of the lower hanging plates and the upper hanging plate.

A headed bolt is inserted into the bolt through holes of the pair of upper hanging plates or lower hanging plates, and the male screw shaft portion of the headed bolt is screwed into the female threaded cylindrical portion of the tubular anchor, so that the upper hanging plate is formed. And a lower hanging plate are fastened to each other, and a plurality of meridional wires or weft wires of the net are held between the upper hanging plate and the lower hanging plate, and the lining block is connected to the net via the pulling tool.

The pulling device has a thin hinge plate portion at each connecting portion of the upper hanging plate and each lower hanging plate, and the upper hanging plate, each lower hanging plate, and each thin hinge plate part are made of synthetic resin. Mold integrally.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

This lining block unit 1 is shown in FIGS.
Etc., a large number of lining blocks 3 are arranged on the upper surface of the net 2, and each lining block 3 is stretched over a plurality of the meridional wire 4 or the weft wire 5 of the net 2, and a pulling tool 6 is provided. Via a connecting means for connecting the retractor 6 to the lining block 3,
It has a structure in which each lining block 3 is connected to the net 2.

The lining block 3 is a natural stone block existing in nature or a concrete block.

The net 2 has a meridian wire 4 and a weft wire 5, and the meridian wire 4 and the weft wire 5 are made of synthetic resin wire, for example, synthetic resin single wire (monofilament) or synthetic resin fiber (multifilament). Focused wire is used. Alternatively, the wire 2 is formed by using a glass fiber-concentrated wire material or a carbon fiber-concentrated wire material, which are lattice-assembled.

As shown in FIG. 1, the connecting means for connecting the retractor 6 to the net 2 comprises a cylindrical anchor 7, an anchor pin 8, a headed bolt 9 and a washer 10. This washer 10 can be saved. Further, as will be described later, the headed bolt 9 can also be used as an anchor pin without using the anchor pin 8.

As shown in FIG. 3, each lining block 3 is provided with a bottomed prepared hole 11 by a drill or the like, and as shown in FIG. 4, a cylindrical tubular anchor 7 is inserted in the bottomed prepared hole. Set up.

The cylindrical anchor 7 has a female threaded cylindrical portion 12 having a female thread formed on the inner peripheral surface on the outer end side, and a split groove 13 on the inner end side.
It is provided with a plurality of split claw pieces 14 cut by. A coupling claw 15 is provided on the outer peripheral surface of the split claw piece 14. Further, a flange 25 that is seated on the opening surface of the bottomed prepared hole 11 is provided at the entrance of the female screw cylindrical portion 12.

The tubular anchor 7 having the female screw tubular portion 12, the split claw piece 14 and the flange 25 is integrally molded of synthetic resin. This synthetic resin is preferably nylon, for example nylon 6. In this tubular anchor 7, the female screw tubular portion 12 is tubular, and the split claw piece 14 does not need to be tubular.

Next, as shown in FIG. 5A, the tubular anchor 7
It has a cylindrical anchor pin 8 that is press-fitted inside. The anchor pin 8 has a true cylindrical shape and has a tapered portion at its inner end. This anchor pin 8 is provided with a bottomed prepared hole 11 using a tool.
Of the tubular anchor 7 is forcibly opened by inserting the press-fitting into the inner part of the cylindrical anchor 7, that is, the inner part of the tubular anchor 7, and the connecting claw 15 of the claw 14 is inserted into the bottomed prepared hole 11. The tubular anchor 7 is coupled to the bottomed prepared hole 11 by biting into the inner wall.

The anchor pin 8 is the tubular anchor 7.
Has a length extending beyond the female screw cylinder portion 12. Therefore, the anchor pin 8 is completely embedded on the inner end side of the tubular anchor 7.

The anchor pin 8 is made of synthetic resin. Nylon is suitable for this synthetic resin.

Next, as shown in FIG. 6, the upper hanging plate 17 forming the retractor 6 is hooked on the upper surface of the net 2 (the block side upper surface), and the lower hanging plate 16 is hooked on the lower surface of the net 2. ,
Between the upper hanging plate 17 and the lower hanging plate 16, a plurality of lines of the meridional wire 4 or the weft wire 5 that form the net 2 are threaded.

The pulling tool 6 includes an upper hanging plate 17 and a lower hanging plate 1.
6 and 6 are formed as separate parts, and the bolt through hole 1 is
9 is concentrically opened. Alternatively, as shown in FIG. 1 and FIG. 2, an upper hanging plate 1 to be hung on the upper surface of the net 2.
7 and a lower hanging plate 16 which is hung on the lower surface of the net 2 are integrally formed by one strip plate, and a bolt through hole 19 is concentrically formed in the central portion of the upper hanging plate 17 and the lower hanging plate 16. It has the configuration opened in.

The retractor 6 having the upper hanging plate 17 and the lower hanging plate 16 is integrally molded of synthetic resin. Polypropylene is suitable as the synthetic resin.

Next, a headed bolt 9 in which a male screw shaft portion 20 and a bolt head 21 are integrally formed is prepared, and the male screw shaft portion 20 of the headed bolt 9 is pulled from the lower surface side of the net 2 to the detention tool 6 described above. The tubular anchor 7 while being inserted into the bolt through hole 19 of
Of the female threaded cylindrical portion 12 of the bolt head 21 and the lower surface of the lining block 3 between the seat surface of the bolt head 21 and the lower surface of the lining block 3 by the screwing. Combine 3

The inner end surface of the male screw shaft portion 20 of the headed bolt 9 and the outer end surface of the anchor pin 8 oppose each other in a close state to regulate the anchor pin 8. Or headed bolt 9
The inner end surface of the male screw shaft portion 20 and the outer end surface of the anchor pin 8 are brought into contact with each other to regulate the anchor pin 8.

Instead of using the anchor pin 8, an anchor shaft portion forming an anchor pin is connected to the male screw shaft portion 20 of the headed bolt 9, and the male screw shaft portion 20 of the headed bolt 9 is connected to the tubular anchor 7. By screwing into the female threaded cylinder part 12 of
The anchor shaft portion may be press-fitted into the inner rear portion of the tubular anchor 7 to expand the split claw piece 14.

In the headed bolt 9, the male screw shaft portion 20 and the bolt head portion 21 are integrally formed of synthetic resin. The synthetic resin is suitably a Duracon resin, particularly a polyacetal resin, and preferably a resin in which reinforcing fibers such as glass fibers are mixed is used.

As described above, the net 2 is made of a wire made of synthetic resin other than metal or tensile strength fiber such as glass fiber. In addition, the retractor 6 and the tubular anchor 7 serving as a block connecting means.
The anchor pin 8 and the headed bolt 9 are all made of synthetic resin. When the washer 10 is used on the head bearing surface of the headed bolt 9, it is also made of synthetic resin.

As shown in FIG. 5A, the tubular anchor 7 described above.
The anchor pin 8 that can be press-fitted into the inner portion of the bottomed prepared hole 11 (inner end side inside), that is, the inner inner portion (inner end of the tubular anchor 7) before screwing the headed bolt 9 is used. Inner side) or, as shown in FIG. 5B, tubular anchor 7
Is temporarily press-fitted in the middle, and the outer end surface of the anchor pin 8 is pressed by the inner end surface of the male screw shaft portion 20 by screwing the headed bolt 9 into the female screw cylinder portion 12 to form the tubular anchor 7.
The press-fitting into the inner part of the tube is advanced, so that the tubular anchor 7
The connection with the inner wall of the bottomed pilot hole by the forced expansion of the split claw piece 14 is maintained.

As shown in FIG. 2, the retractor 6 is bent in the relative direction from the left end and the right end of the lower hanging plate 16 so as to be parallel to the lower hanging plate 16 and is hung on the upper surface of the net 2. A pair of upper hanging plates 17 which are overlapped with each other on the upper surface of the net 2, and the bolt passing holes 19 are formed in the overlapping portions of the upper hanging plates 17 and the lower hanging plate 16. Are set concentrically.

Although not shown, the retractor 6 can be used by reversing it. In this case, the upper hanging plate 17 has a single structure and is bent in the relative direction from the left end and the right end of the upper hanging plate 17 so as to be parallel to the upper hanging plate 17 so that the upper hanging plate 17 is placed on the lower surface of the net 2. A pair of hanging plates 1
6, the pair of lower hanging plates 16 are overlapped with each other on the lower surface of the net 2, and the bolt through holes 19 are concentrically provided in the overlapping portions of both the lower hanging plates 16 and the upper hanging plate 17.

The above-mentioned pair of upper hanging plates 17 or lower hanging plate 1
Reference numeral 6 has elasticity and is biased in the standing direction by the elasticity. By screwing the headed bolt 9 into the female screw cylinder portion 12 and fastening the same, two upper hanging plates 17 or lower hanging plates 16 are provided.
Is polymerized by folding it against elasticity.

Therefore, the upper hanging plate 17 and the lower hanging plate 16 are fastened together by screwing the headed bolts 9, that is, they are fastened against each other to resist the elasticity, so that the upper hanging plate 17 and the lower hanging plate 16 are tightened. The plurality of lines of the meridional wire 4 or the latitude wire 5 of the net 2 are sandwiched between.

As shown in FIG. 2, the pulling tool 6 has a thin hinge plate portion 18 at each connecting portion of the upper hanging plate 17 and the lower hanging plate 16.
And the upper hanging plate 17, the lower hanging plates 16, and the thin hinge plates 18 are integrally molded with a synthetic resin, and the thin hinge plates 18 are bent while resisting elasticity. The hanging plate 17 or the lower hanging plate 16 is bent in the relative direction to form the retractor 6.

Next, a specific structure example of the net 2 will be described with reference to FIGS.

As shown in FIG. 11, the wire 2 and the weft wire 5 of the net 2 are synthetic resin fibers 22 or wire rods 23 in which glass fibers or carbon fibers are bundled, and a plurality of these wire rods 23 are used. 4 and latitudinal material 5 are formed.

That is, one of the warp wire 4 and the latitude wire 5 has a structure in which the wire 23 is parallel to the same plane and is covered with a synthetic resin layer 24 as shown in FIGS. 12A and 12B.

The other of the warp wire 4 and the latitude wire 5 has a structure in which the plurality of wires 23 are twisted together and covered with a synthetic resin layer 24 as shown in FIGS. 13A and 13B.

The above-mentioned net 2 is formed by assembling the above-mentioned meridional wire 4 and the latitude wire 5 into a regular lattice group or an oblique lattice group. For example, as shown in FIG. 10 and FIG. 13C, the other wire rod 23 is inserted between the one twisted wire rod 23 having the twisted structure to form the net 2
Braid.

The net 2 is formed by forming wire rods 23 in parallel or twisted together to cover the synthetic resin layer 24 to form the covered meridional wire rods 4 and the equilateral wire rods 5, and then forming a lattice on the nets. Alternatively, after a net consisting of the meridional wire 4 and the weft wire 5 in which the wires 23 are arranged in parallel or twisted is formed into a lattice, the whole is covered with the synthetic resin layer 24 by being immersed in a synthetic resin liquid.

[0056]

According to the present invention, when the tubular anchor is internally installed in the bottomed prepared hole of the lining block and coupled, the bolt does not project from the lower surface of the lining block. By simply screwing the headed bolt afterwards to the female threaded tubular portion of the tubular anchor, the work of connecting the retractor to the lining block and connecting the lining block to the net via the retainer can be easily performed. it can. In addition, the anchor pin and the headed bolt cooperate to secure the joint strength with the inner wall of the bottomed pilot hole by the cylindrical anchor, and the screw structure of the male screw shaft of the headed bolt and the female screw cylinder of the tubular anchor. Secure the bond strength of both,
Overall, a heavy lining block can be firmly connected to the net.

Further, when the net is made of synthetic resin fiber or other tensile strength fiber, heat resistance and tensile strength for supporting a heavy weight lining block can be secured.

In addition to forming the net with the above material,
Cylindrical anchors, anchors, headed bolts, etc. are made of synthetic resin to effectively prevent rust due to aging deterioration, and appropriately solve the problem of rust flowing out and impeding the environment, and in acidic or alkaline environments. It also exhibits chemical resistance and prevents acid and alkaline deterioration. Therefore, the bonding strength of the lining block can be maintained for many years.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a retractor and each element that forms a coupling means.

2A is a development view of the retractor, B is the same sectional view, and C is a sectional view showing the bent state.

FIG. 3 is a cross-sectional view showing a state where a bottomed prepared hole is provided in a lining block.

FIG. 4 is a cross-sectional view showing a state in which a tubular anchor is internally provided in the bottomed pilot hole.

5A and 5B are cross-sectional views showing a first example and a second example in which an anchor pin is press-fitted into the tubular anchor.

FIG. 6 is a cross-sectional view showing a state in which a retractor is put around a net.

FIG. 7 is a cross-sectional view showing a state in which a headed bolt is screwed into a tubular anchor, and a retainer and a lining block are connected to a net.

FIG. 8 is a plan view of a lining block unit showing a state in which a large number of lining blocks are connected to a net.

FIG. 9 is a partial bottom view of the lining block unit showing a state in which a large number of lining blocks are connected to the net.

FIG. 10 is an enlarged plan view showing a lattice structure of the above-mentioned meridian wire and weft wire material.

FIG. 11 is an enlarged cross-sectional view of a wire used for the warp wire and the latitude wire.

FIG. 12A is a lateral cross-sectional view of one of a warp wire and a weft wire using the above wire, and B is a vertical cross-sectional view thereof.

13A is a transverse cross-sectional view of the other of the weft wire or the warp wire using the above wire, B is a vertical cross-sectional view, and C is an enlarged cross-sectional view showing a braided state of the above-mentioned wire and the weft wire.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lining block unit, 2 ... Net, 3 ... Lining block, 4 ... Meridional wire, 5 ... Weft wire, 6 ... Retaining tool, 7 ... Cylindrical anchor, 8 ... Anchor pin, 9 ... Headed bolt, 10 …
Washer, 11 ... Bottom hole with bottom, 12 ... Female threaded cylinder, 13
... split groove, 14 ... split claw piece, 15 ... connecting claw, 16 ... lower hanging plate, 17 ... upper hanging plate, 18 ... thin hinge plate part, 19 ... bolt through hole, 20 ... male screw shaft part, 21 ... bolt head Part, 2
2 ... Synthetic resin fiber, 23 ... Wire rod, 24 ... Synthetic resin layer, 2
5 ... Flange

Claims (8)

[Claims] 1. A cylindrical anchor made of synthetic resin is internally provided in a bottomed prepared hole provided in a lining block, the other net is made of synthetic resin, and the net is hooked on a meridian wire or a weft wire material of the net. The retractor is made of synthetic resin, and further, the headed bolts that are screwed to the tubular anchor to connect the retainer to the lining block and at the same time connect the lining block to the net through the retainer are made of synthetic resin. The lining block unit for the construction surface. 2. A lining block unit having a construction surface in which a large number of lining blocks are arranged on the upper surface of the net, and each lining block is connected to the net via a pulling tool. A tubular anchor internally provided in the hole is provided, and the tubular anchor has an inner end side with a split claw piece which is expanded by press-fitting the inner end side of the anchor pin to be joined to the inner wall of the bottomed pilot hole. And an internal threaded cylinder portion on the outer end side, and an upper hanging plate hanging on the upper surface of the net and a lower hanging plate hanging on the lower surface of the net, and the upper hanging plate and the lower hanging plate. A headed bolt having a male screw shaft portion and a bolt head integrally formed, and the male screw shaft portion of the headed bolt is retained from the lower surface side of the net. While inserting it through the bolt through hole of the tool, And the inner end surface of the male screw shaft portion and the outer end surface of the anchor pin are opposed to each other by being screwed into the female screw cylinder portion of the bolt, and by the screwing, the upper hook is provided between the seat surface of the bolt head and the lower surface of the lining block. A lining block unit for a construction surface, characterized in that a lining block is connected to a net by tightening a plate and a hanging plate. 3. The lining block unit for a construction surface according to claim 2, wherein the net is made of synthetic resin. 4. The lining block unit for a construction surface according to claim 2, wherein the tubular anchor, the anchor pin, the retainer and the headed bolt are made of synthetic resin. 5. An anchor pin that can be press-fitted into the tubular anchor is provided, and an inner end surface of the male screw shaft portion abuts an outer end surface of the anchor pin by screwing a headed bolt into the female screw tubular portion, and a tubular shape is provided. The lining block unit for a construction surface according to claim 1 or 2, wherein the anchor is configured to hold the connection to the inner wall of the bottomed prepared hole by forcibly expanding the split claw piece. 6. A pair of upper hanging plates which are bent in a relative direction from the left end and the right end of the lower hanging plate in parallel with the lower hanging plate and which are hung on the upper surface of the net. 3. The lining block for a construction surface according to claim 2, wherein the upper hanging plates are overlapped with each other on the upper surface of the net, and the bolt through holes are provided in the overlapping portions of the upper hanging plates and the lower hanging plate. unit. 7. A pair of lower hanging plates bent in a relative direction from the left end and the right end of the upper hanging plate so as to be parallel to the upper hanging plate and hanging on the lower surface of the net. 3. The lining block for a construction surface according to claim 2, wherein the lower hanging plates are overlapped with each other on the lower surface of the net, and the bolt through holes are provided in the overlapping portions of the both lower hanging plates and the upper hanging plate. unit. 8. The pulling device has thin hinge plates at each connecting portion of the upper hanging plate and the lower hanging plate, and the upper hanging plate, the lower hanging plate and the thin hinge plates are made of synthetic resin. The lining block unit for a construction surface according to claim 6 or 7, which is integrally molded.