JP3184898U - Anti-sand dust device for underground pipe connection work - Google Patents

Abstract

[PROBLEMS] When underground piping work such as gas pipes and water pipes is carried out in a low excavation groove, the gravel or dust that is blown by strong winds is mixed with the connecting part of the pipe in contact with the wall surface of the excavation groove Provided are a dustproof device and a support bar for underground pipe connection work that can prevent adhesion.
[MEANS FOR SOLVING PROBLEMS] A length adjustable shaft rod having a fixing block 5 with a fixing hole opened at the shaft tip is attached to the upper end of a sheet excellent in heat resistance, flame retardancy, durability, antistatic effect, etc. Anti-sand dust devices A and A ′, which are connected to a shaft rod made of a shape memory material at the lower end and are provided with fixing portions that can be fixed with pegs 12 or the like on both sides of the lower end of the sheet, are arranged on both sides of the excavation groove B. At this time, the fixing blocks facing each other with the support bars C and C ′ are connected to each other and can be fixed with a support bar having a clamping piece for clamping the shaft rod in the vicinity of the bent portion.
[Selection] Figure 5

Description

  In the present invention, in pipe connection work in a low excavation groove where water and gas pipes are laid, the wall of the excavation groove and small gravel or dust on the ground surface are mixed and adhered to the connection part of the pipe due to wind or contact with workers. More particularly, the present invention relates to a sandproof and dustproof device for underground pipe joining work that can effectively exert its effect in pipe connection work in a bent excavation groove.

  The present invention is a low excavation groove with a depth of 1.5 m or less that does not require earth retaining or the like, and is a drip prevention that hangs on the ground surface and wall surface corresponding to an excavation groove bent at an arbitrary angle from linear to 90 degrees. The dust sheet has an excellent feature that dust and small gravel can be prevented from being scattered by contact with the wind or the body and adhering to a connection part during piping work or mixing into the pipe.

  Even if it is a small excavation groove when water and sewerage or gas pipe laying work is done, if the depth of the groove exceeds 1.5 m, the sheet pile excavation is the principle, and even if it is less than 1.5 m, the soil quality It is stipulated that the same measures should be taken when there is a risk of collapse due to such factors.

  If the excavation groove is covered with sheet piles, etc., there is a relatively low risk that the earth and sand will collapse and adhere to the connection part of the pipe even when the body touches the wall surface during piping work. In the excavation groove, earth retaining work such as sheet piles is omitted, and when the excavation width is narrow, dust or small gravel scattered due to the contact between the wall surface and the worker or the movement of wind or passersby etc. There are many cases where trouble occurs due to adhesion to the connecting portion, and countermeasures are urgently required particularly in piping work on narrow roads in urban areas.

  The conventional earth retaining technology mainly focuses on excavation grooves of 1.5 m or more. For example, in Japanese Patent Laid-Open No. 7-207664, construction is easy and quick excavation and earth retaining work can be performed. An auxiliary plate is placed on the inner surface of the upper part of the excavation groove to hold the upper part of the excavation groove, and the auxiliary plate is designed to hold the sheet pile up and down and not tiltable. And the earth retaining method are disclosed.

  Japanese Patent Laid-Open No. 10-182081 covers both wall surfaces of the excavation groove with sheet piles, and a plurality of hydraulic jacks are arranged on both sheet piles. Water is fed into the hydraulic jacks to push out the piston and stretch between the sheet piles for excavation. A technique for earthing both walls of a groove is described.

  Both of the above two patent documents are intended for excavation grooves with a depth of 1.5 m or more due to their structure. As in the present invention, piping in low excavation grooves for water and gas pipes. During piping construction, especially in narrow urban roads and urban areas with many bent roads, dust blown by the wind and small gravel peeled off due to contact between the excavation wall and the body of the worker enter the joints. No prior art has been found that aims to prevent adhesion.

  JP-A-7-207664   JP 10-182081 A

  As described above, when connecting underground pipes such as water pipes and gas pipes in the low excavation groove, the present invention is connected to the pipe connection part where the wall of the excavation groove and small gravel or dust on the ground surface are connected to the pipe joint. In addition to being able to handle straight excavation grooves as well as 90-degree bent excavation grooves, the structure is extremely simple, lightweight, easy to move, install and operate An object of the present invention is to provide a simple dustproof device.

  In order to achieve the above-mentioned object, the present invention has flexibility at the upper end of the sandproof dust sheet made of a material excellent in weather resistance, heat resistance, fire resistance and antistatic effect, etc. And, the shaft rod with elastic structure is attached with the left and right shaft tip parts made into a double structure, the main body part with the fixed block with the fixed hole opened at the edge of the shaft rod, and the both sides of the excavation groove It consists of a support bar that fixes the arranged dustproof devices.

The shaft rod of the dustproof device does not require flexibility when used in a straight excavation groove, but it can be placed on the entire shaft bar or in the middle to accommodate the bent excavation groove. It is necessary to bend according to the angle of the excavation groove using a flexible portion.
As a flexible material, it is convenient to use a corrugated tube, but any material such as a plastic material can be used as long as it is a shape memory material that can be processed into a rod shape.
It is convenient to give flexibility to the entire shaft rod because any portion can be bent, but it is possible to achieve the purpose sufficiently by arranging it only in the middle portion.

An outline of an excavation groove bent about 45 degrees as an example of the installation method of the sand prevention dust apparatus will be described. After temporarily arranging a sand prevention dust apparatus with a central part bent at 45 degrees on both sides of the excavation groove, After fixing to the bottom of the excavation groove with a pile or nail (hereinafter referred to as peg) to the ring-shaped fixed part attached to the lower end of the anti-dust sheet, pull up the anti-dust sand sheet and extend the anti-dust sheet in advance. Insert the fixing holes at the bottom of the fixing block attached to both ends of the shaft bar to the protrusion of the support bar that has been passed and fix it with the thumbscrew, or fix the sandproof dust sheet on the bottom after fixing it to the support bar first This is a method of fixing and then fixing the vicinity of the bent portions of the both dustproof devices with a support bar for the bent portions.
In addition to this fixing method, using the fixing holes of the opposing fixing blocks of the sand protection device placed on both sides of the excavation groove, the support bar legs bent at both ends are inserted from above and then fixed with thumb screws, or There is a method of driving a peg into the fixing hole of the fixing block and fixing it directly to the ground, etc., which can be appropriately selected according to the situation of the construction site.

  The sandproof dust device supports not only straight excavation grooves, but also excavation grooves of any angle, such as 45 degrees, 90 degrees, etc., and small gravel on the surface or dust scattering or the walls of the excavation grooves and the worker's body. It consists of several parts that can easily prevent dirt and small gravel from falling on the surface from adhering to the pipe connection under construction or entering the pipe. Therefore, it can be provided at a very low price, and is extremely light and easy to carry in and out. The installation work can be easily performed by a single worker, and the effect is extremely great.

  Hereinafter, embodiments of the invention will be described in detail with reference to FIGS.

  FIG. 1 shows the basic structure of the dustproof device (A). The surface of a sheet excellent in heat resistance, water resistance, weather resistance, antistatic effect, etc., for example, a polyester fiber fabric is coated with vinyl chloride, A sand-proof dust sheet (1) that has been processed with a resin such as fluorine or acrylic, or made by adjusting carbon fiber or special metal that has an electric discharge effect, is cut into 1800mm vertical and horizontal positions, and so-called hanging shafts are formed on the upper and lower ends. A sleeve (2) (2 ') through which a rod-like object corresponding to a rod can be inserted is provided.

The upper sleeve (2) has a flexible part (3) having a flexibility such as a corrugated tube in the center, and a fixing block (5) in which fixing holes (4) are appropriately opened at both ends. A rod-shaped shape memory shaft rod (b) that also serves as a weight is inserted into the lower sleeve (2 ′).
If a sleeve (2 ″) is provided in the lower part from the center of the dust-proof dust sheet (1) and the shape memory shaft rods (b ′) and (b ″) are inserted, strong winds etc. It is possible to prevent the sheet from shaking.
As a structure of the shaft rod (a), not only the central portion but also the entire shaft rod and other suitable locations can be made flexible.

FIG. 2 (a) shows a state in which the sandproof dust device (A) is wound up, and (b) is a sandproof dust device (A) (A) (A) (A) that is passed over the excavation groove (B) and arranged on both sides of the groove. ') Support bars (C) and (C') that are adjustable in length when used at the same time, and these support bars (C) and (C ') are shown in FIG. A movable part (d ′) shown in the movable parts (d) and (b) is attached in a slidable state.
The movable part (d) includes an L-shaped piece (6) that contacts the upper end of the excavation groove (B), a protrusion (7) that passes through the fixing hole (4) of the fixing block (5), and a fixing thumbscrew ( 8), and the movable part (d ′) includes a clamping piece (9) for clamping the shaft rod (a) at the lower part and a fixing thumbscrew (8) at the upper part.

Next, a method of installing the sandproof device (A) in the excavation groove (B) bent at about 45 degrees using the support bars (C) and (C ′) will be specifically described with reference to FIG.
First, the flexible portions (3) near the center of the sandproof dust device (A) (A ') are bent at about 45 degrees and temporarily placed on both sides of the excavation groove (B), respectively, and the sandproof dust sheet (1) The pegs (12) are driven into ring-shaped fixing parts (11) provided near both ends of the lower part of the base plate and firmly fixed to the bottom. After inserting into the upper protrusion (7) of the support bar (C) previously passed above the excavation groove (B) into the lower fixing hole (4) of the fixing block (5), the lower L-shaped piece (6 ) Are brought into contact with the upper end of the excavation groove (B) to determine the position, and the thumbscrew (8) is tightened to be firmly fixed.
Needless to say, there is no problem with the fixing order even after the sandproof dust sheet (1) is fixed to the bottom surface.
Further, in the middle part of the both dustproof devices (A) and (A ′), the clamping rod (9) of the movable part (d ′) without projections arranged on both sides of the support bar (C ′) ), And secure with the thumbscrew (8).

  As another utilization method, when the sheet pile (13) driven into the excavation groove (B) is contaminated with mud or the like, the sheet pile hanger (13) having the protrusion (7) shown in FIG. An anti-sand dust device (A) can be installed to prevent adhesion of sludge and the like.

Plan view of the dustproof device (A) body Perspective view of the entire component Perspective view of movable part attached to tip of support bar A perspective view and a side view of a hanger for locking the dustproof device main body to the sheet pile Perspective view showing a state where it is installed in the excavation groove The perspective view which shows the state which attached the dustproof device to the sheet pile

A, A 'Sand proof dust device B Excavation groove C, C' Support bar a Shaft bar b, b ', b "Shape memory shaft bar d, d' Movable part 1 Sand proof sheet 2, 2 ', 2" Sleeve 3 Possible Flexible part 4 Fixing hole 5 Fixing block 6 L-shaped piece 7 Projection 8 Thumb screw 9 Holding piece 10 Locking part 11 Fixing part 12 Peg 13 Sheet pile

Claims (6)

  A length-adjustable shaft rod with a fixed block with a fixed hole at the shaft tip is attached to the upper end of the sheet with excellent heat resistance, flame retardancy, durability, antistatic effect, etc., and shape memory material is attached to the lower end In addition to connecting the shaft rods formed in the above, and providing fixing portions for fixing to the bottom with pegs or the like on both sides of the lower end of the seat, connecting the fixed blocks facing each other with a support bar, and connecting the shaft near the bent portion An anti-sand dust device for underground pipe connection work, characterized in that it can be fixed by a support bar having a holding piece at the lower part for holding a stick.   The sandproof dust device for underground pipe connection work according to claim 1, wherein the entire shaft rod is configured to be flexible.   The sandproof dust device for underground pipe connection work according to claim 1, wherein the entire shaft rod is made of a flexible plastic material or the like.   The sandproof dust device for underground pipe connection work according to claim 1, wherein an intermediate portion of the shaft rod is constituted by a corrugated tube or a flexible plastic rod.   An L-shaped piece that abuts the upper end of the excavation groove is provided at the lower part, and a protrusion that passes through the fixing hole of the fixed block is provided at the upper part. A movable part that can be fixed with a thumbscrew is slidable near both ends of the bar. The support bar according to claim 1, wherein the support bar is attached to the support bar.   2. The support bar according to claim 1, wherein a holding part for holding the shaft bar is provided at a lower part, and two movable parts which can be fixed with a thumbscrew are slidably attached in the vicinity of both ends of the bar. .

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