JPH10325170A - Grating and laying method of grating at groove body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laying method of a grating at a groove body in which a series of work processes from the concrete molding of the groove body to laying of the grating are simplified and improved in efficiency so as to shorten the construction period and reduce the work cost, when the lattice-like grating is laid and mounted on the upper opening part of the groove body. SOLUTION: The upper and lower faces and the right and left side plates 4 of a grating 1 are wound with a resin film 5, and it is worked into a grating with membrane 1A having a membrane 6. In the jobfield where a groove body 10 is constructed, the inside molds 12 of a concrete formwork 14 are set lower than the outside molds 13 making pairs with them by the height of the grating 1, the grating with membrane 1A is laid on the inside molds 12, it is provided with projecting parts 7 a little projecting the right and left end parts toward the outside molds 13, and after such setting, ready-mixed concrete 23 is placed in the concrete formwork 14 to mold the groove body 10, and after solidification of the concrete, the membrane 6 is peelingly removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of laying a grating, which is fitted on the upper end of a U-shaped groove body and laid in an upper opening of the groove body, in the groove body, and a grating.

[0002]

2. Description of the Related Art Grating is placed inside a rectangular frame.
It has a basic shape in which bearing materials such as the bearing bar 2 and the connecting bar 3 are arranged in a lattice shape, and is fitted and mounted on the upper end of a concrete U-shaped cross-section groove body having groove side walls opposed to each other, and It is used so that vehicles and pedestrians can pass on the upper surface. The grating is laid so that it can be removed from the groove so that cleaning, maintenance, inspection and replacement of the groove can be performed freely.

The above-mentioned method of laying the grating in the groove is performed by the following procedure and method. That is, referring to FIG. 4, first, when forming the groove body 10 on which the grating 1 is laid, the concrete formwork 14 of the left and right groove side walls 11A and 11B of the groove body 10 is It is installed upright. The concrete form 14 has an inner form plate 12 and an outer form plate 13 surrounding the both sides of the groove side walls 11A and 11B. A square member 20 extending in the direction is nailed and driven, and an angle member 2 with an anchor bolt 22 is provided on the outer periphery of the square member 20.
1 is fitted to the outer lower corner, nailed and attached, and a concrete formwork 14 for driving the groove side walls 11A and 11B.
Is formed.

[0004] Subsequently, fresh concrete 23 is poured from the upper opening of the concrete form 14, and after solidification of the concrete, the concrete form 14 including the square member 20 is removed while leaving the angle member 21, and the concrete form 14 is placed inside the upper end. A pair of groove side walls 11A and 11B having grating mounting grooves 24 are formed. Then, the grating 1 is removably fitted into the grating mounting groove 24 so as to be fitted and mounted.

[0005]

The above-mentioned conventional groove body 10
In the method of forming and the method of laying the grating, since the grating 1 is retrofitted to the groove 10 formed in advance into concrete in a predetermined shape, it becomes a two-step method, and the work process becomes complicated and troublesome. And the groove side wall 11A
In order to provide a grating mounting groove 24 in 11B,
Since it is necessary to attach and fix the square members 20 and the angle members 21 to the concrete formwork 14, the structure of the concrete formwork 14 is complicated, and it takes time and effort to set up the formwork before placing concrete, and the cost is high. become.

Further, in the conventional method of laying the grating in the groove, the grating which is standardized and mass-produced in the factory is mounted in the groove which is uniformly formed to the standard size. The rattling between the grating and the groove having the “variation” and “dimension variation” occurs, and there is a quality defect in which some rattles when passing through a vehicle body or the like.

The present invention provides a method of laying a grating in a groove and a grating, which solves the above-mentioned disadvantages of the prior art.

[0008]

The present invention for solving the above-mentioned technical problem is that concrete left and right side walls of a groove body are concretely cast into a concrete form having an inner mold plate and an outer mold plate opposed to each other. When forming and laying a grating in the upper opening of the groove detachably, the inner template of the concrete form is set lower than the pair of outer templates by the height of the grating. A coating non-adhesive film or paper wrapped around the grating is mounted on the upper end of the inner mold plate, and the outer mold is formed by pairing a part of the left and right end portions of the coated grating. At the same time as projecting in the direction of the plate and setting it, casting concrete in the formwork, removing the film after solidification of the concrete, and forming the groove And laying methods "to the grooves of the grating, characterized in that laying mounting the grating into the groove body,

[0009] A grating body having left and right side plates at both end portions of bearing bars arranged in parallel at required intervals with the band width direction of the metal band material being vertical is formed as a grating body, and the grating body is formed on the outer surface of the left and right side plates of the grating body. A structure in which a grating width adjusting plate for absorbing a variation in the molding dimension of the lattice body is continuously and integrally attached in the longitudinal direction of the side plate, and a grating width between the outer sides of the grating width adjusting plate is regulated and shaped uniformly. Grating ".

That is, the method of laying grating of the present invention utilizes a grating having a non-concrete resin film or paper coating as a part of a concrete formwork to avoid direct joining of concrete and grating. Simultaneously, "concrete casting of the groove body" and "laying of the grating to be detachably attached to the groove body". Then, the grating of the present invention absorbs the "inevitable dimensional variation in processing" generated in the grating body of the grating body obtained by welding the metal plate material by the width adjusting plate, and the precise width size of "there is no dimensional variation". It features a grating-shaped structure.

The film made of film or paper in the above-described method for laying the grating does not need to be provided on the entire outer periphery of the grating. ”And“ the upper surface that is liable to cause concrete adhesion and soiling due to footing during concrete placing work ”. The width adjusting plate of the grating according to the present invention is formed by, for example, inserting and setting an industrially mass-produced lattice in a resin injection mold, and adopting a method of post-attaching the lattice to the insert set.

[0012]

According to the method of laying the grating in the groove according to the present invention, the non-concrete coating is interposed at the joint between the cast concrete and the grating. The casting and the laying of the grating for laying and detachably attaching to the groove body can be simultaneously performed, and the structure and setting operation of the concrete formwork 14 are simplified by eliminating the use of the conventional square members 20 and angle members 21. A series of construction processes from frame setting to grating laying is simplified and streamlined.

[0013] The surface of the concrete and the side edges are protected by the coating, so that there is no danger of concrete adhering or soiling caused by soil foot during the casting operation, and a beautiful appearance is maintained. Since the groove body molding is a "construction method in which the side ends of the pre-set grating are part of the concrete formwork", mutual connection between the molded groove body and individual gratings is possible. The shape of the portion fits "right", and there is no rattling between the two.

Further, since the grating of the present invention having the above-described structure has a structure in which the width adjusting plate is attached to a metal grid body industrially produced by welding or the like, the grating width has a high value of "no dimensional variation". Quality grating is achieved.Therefore, even if the grating is post-fitted into the concrete-cast groove that matches the grating width, the fit between the groove and the groove is good, preventing "chatter" between the two. it can. Then, when used in the above-described laying method of the present invention, the shape and size of the groove formed by forming the grating as a part of the concrete template are uniform, so that the compatibility of the grating with the groove is improved, and both of them are improved. The fit is more stable.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of a method for laying grating in a groove according to the present invention will be described with reference to FIG. That is, a bearing bar 2 which is arranged side by side at a required interval with the strip direction of the metal strip being vertical, and a connecting bar 3 which is bitten into the middle upper end of the bearing bar 2 and is welded and arranged orthogonally.
(The connecting bar 3 shown is a twisted bar having a square bar twisted), and a rectangular single side plate 4 is provided at both ends of the bearing bar 2.
The grating 1 of the rectangular lattice body welded with
First, grating 1
Is a method in which a resin film 5 is wound around the entire surface of the grating 1 in the transverse direction except for the front and rear end surfaces, and a film 6 made of the resin film 5 is provided on both upper and lower surfaces and side plates 4 on the left and right ends. It is processed into a grating 1A with a film that wraps the grating 1 tightly so as not to form.

At the site where the groove body 10 is provided, a concrete formwork 14 composed of an inner mold plate 12 and an outer mold plate 13 forming left and right groove side walls 11A and 11B of the groove body 10 is placed on a concrete base plate 15. And set
The inner template 12 is set lower than the outer template 13 by an amount corresponding to the height H of the grating 1. And
The grating 1A with a film is placed on a pair of inner mold plates 12 facing each other by the setting, and a set of protrusions 7 for projecting a part of the left and right end portions in the direction of the pair of outer mold plates 13 is provided.

Thereafter, ready-mixed concrete 23 is poured from the upper openings of the pair of left and right concrete forms 14 to be solidified. After the solidification, the concrete mold 14 is removed and the coating 6 of the grating 1 is peeled off. Groove body 10
At the same time as the concrete molding, the grating 1 is detachably mounted on the upper opening of the groove body 10. In addition,
The peeling of the coating 6 is performed only when the grating 1 is laid in the groove body 10 and only the exposed part is peeled off, or when the groove body 10 is small and the worker cannot enter the groove body 10. The grating 1 is once removed from the groove body 10 and peeled off simultaneously with the removal of the inner mold plate 12.

Next, an embodiment of the grating according to the present invention will be described with reference to FIG. That is, the grating 1 is a grating main body 9 of a metal square lattice which is mass-produced in a factory.
And a grating width adjusting plate 8 (hereinafter simply referred to as a width adjusting plate 8) integrally attached to the entire outer surface of the left and right side plates 4 of the grating body 9, and the width adjusting plate 8 is provided outside the left and right side plates 4 of the grating body 9. It has a shape shaped to a uniform and uniform grating width B1 by absorbing the individual dimensional variations of the grid body width B2 of the inter-dimensions.

More specifically, the grating body 9 of this embodiment has a pitch L with the width direction of the I-shaped cross section being vertical.
Bearing bar 2 and the bearing bar 2
Is a metal rectangular lattice provided with several connecting bars 3 which are bitten and welded to the upper end of the bearing bar 2 and disposed and fixed orthogonally to the bearing bar 2, and both end portions of the bearing bar 2 are adjacent to each other. The bent piece 16 is bent in the direction of the bearing bar 2 to form a bent piece 16 that closes the gap adjacent to the bearing bar 2, and the bent piece 16 constitutes the left and right side plates 4 continuously forming two opposing sides of the lattice body. .

The width adjusting plate 8 is formed in a resin strip shape and is continuously attached to the entire surface of the left and right side plates 4 in the longitudinal direction, and the dimensional variation of the main body width B2 of the grating main body 9 naturally caused by industrial mass production. The width between the outer sides of the pair of width adjusting plates 8 attached to the left and right side plates 4 of the grating main body 9 is unified to a uniform and regulated grating width B1, and the conventional grating width inevitable by industrial mass production. Dimensional variations are not present, and are uniformly shaped to a high-accuracy standard size for each type and number of gratings 1.

The grating with the width adjusting plate 8 is formed by the following method. That is, with reference to FIG. 3 showing one embodiment of the method, first, the forming dies 17 are formed on the left and right side plates 4 of the grating main body 9 standardized and mass-produced.
Are set close to each other and the mold 17 is set.
A slit-shaped molding cavity 18 is set between the mold surface and the left and right side plates 4, and a grating width B1 formed by a pair of width adjusting plates 8 in which the mold surface spans S of a pair of molding dies 17 are attached to the grating body 9. The left and right side plates 4 are preliminarily applied with a required adhesive to prepare for molding. Thereafter, a resin solution such as a two-pack type urethane solution mixed with a curing agent is poured into the molding cavity 18, solidified, and removed from the molding die 17 to form the grating 1 shown in FIG.

According to the molding method of the embodiment shown in FIG. 3, the inevitable width variation of the grating body 9 due to industrial mass production is caused by the cavity width C of the molding cavity 18.
(Ie, the thickness of the width adjustment plate 8), the grating width B1 of the dimension between the outer sides of the pair of width adjustment plates 8 is:
High quality grating of "no variation" is regulated and shaped in conformity with the cavity span S.

The grating 1 and the groove 10 of the present invention
The method of laying the grating on the upper surface is not limited to the above-described embodiment, and the grating 1 in which the width adjusting plate 8 is attached to the outer surface of the left and right side plates 4 of the single rectangular plate illustrated in FIG. 1 or the width adjusting plate 8 is provided. A grating 1A with a film in which the film 6 is provided on the grating 1, or a film 6 is formed with non-adhesive concrete paper,
The width adjusting plate 8 may have a tapered shape that becomes thinner in the lower direction of the grating height of the grating 1 to make it easier to disengage the groove 10 from the groove 10.

[0024]

As described above, since the grating of the present invention is regulated and shaped so that the grating width does not have a dimensional variation, the fitting property of the grating to a groove formed into concrete with a certain reference shape is improved. In addition, there is an effect of preventing "rattle" between the grating and the groove body, preventing "rattle" noise of the grating during passage of a vehicle, etc., and improving the laying quality of the grating in the groove body.

According to the method of laying a grating in a groove body of the present invention, molding of a concrete groove body and laying and setting of a grating in the groove body can be simultaneously performed, and a series of construction processes can be simplified and made efficient. Shortening and reduction of construction costs are promoted. And since a part of the grating preset on the construction formwork is used as a concrete formwork, the fit between the groove and the grating is extremely good,
The same "rattle" noise as in the above-described grating effect is prevented to improve the quality of the grating laid in the groove. There are the above effects.

[Brief description of the drawings]

1A and 1B show a method of laying a grating in a groove body according to an embodiment of the present invention, wherein FIG. 1A is a perspective view showing a processing method of providing a film on the grating, and FIG. 1B shows a procedure and a construction method of the laying method. Front view

FIG. 2 is a perspective view of a grating according to an embodiment of the present invention.

FIG. 3 is a plan view showing a method of forming the grating shown in FIG. 2;

FIG. 4 is an explanatory view of a conventional method of laying grating in a groove body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grating 2 Bearing bar 3 Connection bar 4 Left-right board 5 Film 6 Coating 7 Projection 8 Grating width adjustment board 9 Grating body 10 Groove body 11A / 11B Groove side wall 12 Inner mold board 13 Outer mold board 14 Concrete formwork 16 Curved piece 17 Molding die 18 Molding cavity 20 Square material 21 Angle material 23 Ready-mixed concrete B1 Grating width B2 Grating body width C Cavity width S Cavity span

Claims (3)

[Claims] 1. A left and right groove side wall of a groove body is formed by concrete casting into a concrete form having an inner mold plate and an outer mold plate opposed to each other, and a grating is detachably attached to an upper opening of the groove body. When laying, the inner template of the concrete formwork is set lower than the pair of outer templates by the height of the grating, and a non-concrete adhesive film or paper is wound around the grating. The grating with the coating is placed on the upper end of the inner mold plate, and the left and right end portions of the grating with the film are set so as to protrude slightly in the direction of the pair of outer mold plates. Concrete is poured into the concrete, and after the concrete is solidified, the film is removed, and the groove is formed and, at the same time, the grating is laid and mounted on the groove. To lay the grating on the groove. 2. A grating body having left and right side plates at both end portions of bearing bars which are arranged side by side at a required interval with the band width direction of a metal strip being vertical, and the outer surfaces of the left and right side plates of the grating body. In addition, a grating width adjusting plate that absorbs the variation in the forming dimensions of the lattice body is continuously and integrally attached in the longitudinal direction of the side plate, and the grating width between the outsides of the grating width adjusting plate is regulated and uniformly regulated. Grating characterized by structure. 3. The grating according to claim 2, wherein the grating width adjusting plate has a tapered shape that becomes thinner in a downward direction of the grating height.