JP2726981B2 - Leveling plate for concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a level adjusting plate for a concrete product, which is fixed to an installation surface of the concrete product when the concrete product is laid on site.

[0002]

2. Description of the Related Art Conventionally, when laying concrete products such as gutters and box culverts on site, concrete is driven into the installation surface, and concrete products are laid on the installation surface. It is necessary to adjust the level of the concrete product, and therefore, the level is adjusted by appropriately stacking one or more rectangular plates having a predetermined thickness under the concrete product.

At the time of level adjustment, while the concrete product on the installation surface is lifted up by a crane or the like, the plate materials are stacked one by one, and the concrete product is placed on this to adjust the level. However, such a plate material is difficult to insert because it is easy to catch on the lower part of the concrete product because the insertion side is angular, and if the stack does not overlap exactly on the lower plate material, it will be stacked before installing the concrete product. Since the concrete product collapsed and was hung gradually while swaying, the lower part of the concrete product rubbed the plate material to break the stack, and as a result, the level could not be adjusted, and the same operation had to be repeated.

In addition, when the level adjustment is completed and the plate is fixed to the installation surface, the installation location of the concrete product is moved and the work must be performed. Even if a concrete product is installed after fixing, it is displaced from the lower part of the plate material, and it is necessary to adjust the fixing position again and fix it.

In some cases, a protruding bar such as a reinforcing bar protrudes from a place where a concrete product or the like is laid. In this case, the protruding bar is cut. However, it is not always possible to completely cut the protruding bar from its root. Since the roots protrude, they hindered the plate material from being fixed at that location.

[0006]

DISCLOSURE OF THE INVENTION The present invention is easy to insert into the lower part of a concrete product, facilitates positioning during stacking and position adjustment during nailing, and can fix even if there is a bar-shaped obstacle such as a reinforcing bar. It is an object of the present invention to provide a concrete product level adjusting plate for improving the efficiency of product laying work.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the problem of delay in construction due to the inconvenience of adjusting the level of a concrete product based on the above-mentioned prior art. By inserting long nail holes in the vertical and horizontal directions symmetrically in the flat part of the flat plate, respectively, it is easy to insert them into the lower part of the concrete product. The nail is temporarily fixed with a nail, and the plate is shifted in one direction to adjust the position. Another pair of nail holes are nailed to facilitate positioning and fixing, and a pair of positioning protrusions are provided on the surface of the plate. In addition, a fitting groove is formed on the outer periphery of the positioning protrusion, a fitting hole is provided on the back surface of the flat plate corresponding to the positioning protrusion, and a fitting corresponding to the fitting groove is formed on the inner periphery of the fitting hole. Positioning when stacking flat plates by forming ridges The projection is fitted into the fitting hole to facilitate positioning of the upper flat plate, and the positioning groove and the fitting ridge provided in the positioning projection and the fitting groove are fitted to each other, so that the protrusion from the fitting hole is formed. The positioning projections are prevented from falling out so that the stacked state does not easily collapse.

Further, a reinforcing bar insertion passage is cut from the edge of the flat plate, and the reinforcing bar holding portion having a width substantially equal to that of a reinforcing bar having an appropriate diameter is gradually reduced in the depth direction of the reinforcing bar insertion passage. A pair of left and right elastic protruding pieces are obliquely provided on the wall of the rebar insertion passage so as to face the insertion hole formed narrower in front of each rebar holding part. The piece is made to be elastically pushed open by the insertion of the reinforcing bar, and a cut root of a reinforcing bar or the like having the same diameter as any one of the reinforcing bar holding portions is fitted and held in the reinforcing bar holding portion. In addition to being able to be fixed, the elastic protruding piece is elastically deformed at the time of fitting of the cut root to the reinforcing bar holding part, thereby facilitating insertion. The above drawbacks have been solved by trying to keep the root from coming off A.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a main body of a level adjusting plate according to the present invention, wherein a flat plate 2 made of synthetic resin is formed in a substantially rectangular shape. On the surface of the flat plate, slant portions 3, 3a descending outwardly are formed at the long and short edges, and the flat portion 4 of the flat plate 2 has nail holes 5, 5a, which are long in the vertical and horizontal directions with respect to the flat plate 2. 6, 6a penetrate symmetrically with respect to the center axis L of the long side of the flat portion 4.

A pair of positioning projections 7 and 7a are provided on the surface of the plate 2 symmetrically with respect to the center axis L,
Fitting holes 8 corresponding to the positioning projections 7 and 7a on the back surface of the flat plate;
8a, the fitting holes 8, 8a are formed so as to reach the back side of the positioning protrusions 7, 7a, and when a pressing force is applied to the positioning protrusions 7, 7a from above, the material is elastically bent due to the material characteristics thereof. The holes 8 and 8a are recessed.

The positioning projections 7 and 7a are formed in a substantially columnar shape with a reduced cross-sectional thickness, and fitting grooves 9 and 9a having a circular cross section are provided on the outer periphery thereof. Are formed with fitting ridges 10, 10a corresponding to the positions of the fitting grooves 9, 9a, and when a plurality of main bodies 1 are stacked and joined,
The positioning protrusions 7, 7a of the other main body 1 are fitted into the fitting holes 8, 8a of the other.
Are fitted to the fitting grooves 9, 9a, the fitting ridges 10, 10a are fitted so that the main bodies 1 are perfectly joined.

Since the positioning projections 7, 7a are formed to have a small cross-sectional thickness as shown in FIG. 7, the positioning projections 7, 7a
The rim of the base is formed continuously with the flat portion 4 at the ultra-thin portions 11 and 11a, and is reinforced by providing bulging portions 12 and 12a on a part of the back side of the ultra-thin portions 11 and 11a as shown in FIGS. doing.

Although the inclined portions 3 and 3a are formed by continuously forming the long side and the short side of the flat plate 2 into an L-shape, the present invention is not limited to such a method. And may be formed on at least one side.

Reference numeral 13 denotes a rebar insertion passage formed on the center axis L of the flat plate 2 so as to extend from the longitudinal end edge where the inclined portion 3 of the flat plate 2 is provided to substantially the center, and the rebar insertion passage 13 has an appropriate diameter. Steps of the reinforcing bar holding portions 14, 14a... Having substantially the same width as the reinforcing bar are gradually reduced toward the depth direction of the reinforcing bar insertion passage 13.
A large number are continuously formed via 15, 15a.

.. Are a pair of left and right elastic protrusions projecting obliquely toward the front of the reinforcing bar holding portions 14, 14 a on the wall surface of the reinforcing bar insertion passage 13, and of the elastic protrusions 16, 16 a. There is no gap between the tips with the insertion holes 17, 17a ... of the rebar holding parts 14, 14a ...
The interval is formed to be smaller than each rebar holding part 14, 14a ...
The distal ends of the elastic protruding pieces 16, 16a are set so as to be in contact with the side surfaces of the reinforcing bars held by the reinforcing bar holding portions 14, 14a, so that the side surfaces of the reinforcing bar insertion holes 17, 17a ... can be pressed. The elastic protruding pieces 16, 16a are resiliently pushed open by insertion of a reinforcing bar, so that the insertion ports 17, 17a are resiliently expandable.

The formation of the elastic projections 16, 16a...
As shown by dashed lines in FIG. 1, the reinforcing bar holding portions 14, 14a... Extend in the depth direction of the reinforcing bar insertion passage 13 so as to become a part of the arc of the reinforcing bar diameter held by the reinforcing bar holding portions 14, 14a. It has a connecting circular shape whose diameter is gradually reduced.

In this embodiment, the elastic projections 16, 16a
The height of... Is about one-third of the thickness of the main body 1 from the bottom of the main body 1 as shown in FIG. This is because it is assumed that the elastic protruding pieces 16, 16a... Do not elastically deform when the rebar is fitted to 14, 14a.
If the elastic protrusions 16, 16a... Can be elastically deformed depending on the type of the synthetic resin, as shown in FIG.
16a are provided at the same height as the thickness of the main body 1.

Are rectangular holes which penetrate a large number at appropriate places over the flat portion 4. The rectangular holes 18, 18a... Are formed in this embodiment but need not be provided.

The main body 1 has several thicknesses, and the main body 1 having the appropriate thickness is selected, and a suitable number of the main bodies 1 are stacked to form a desired height.

Next, the operation of the concrete product level adjusting plate according to the present invention will be described. When a concrete product W such as a gutter or a box culvert is laid on site, first, a concrete product W suspended from a crane is used. In order to obtain a desired height on the installation surface corresponding to a key point, one thick main body 1 is appropriately placed or a predetermined number of the main bodies 1 are stacked.

In the stacking of the main bodies 1, when the positioning projections 7 and 7 a of the lower main body 1 are fitted into the upper fitting holes 8 and 8 a, the fitting grooves 9 provided in the positioning projections 7 and 7 a are provided. , 9a are fitted with fitting ridges 10, 10a provided in the fitting holes, and the main body 1 is in a firmly joined state.

After the level adjustment is completed, 1
When fixing the main body 1 joined to one or more sheets, first, as shown in FIG.
A nail is driven into one of the two sets a, 6, and 6a and temporarily fixed, and the flat plate 2 is shifted in the longitudinal direction of the nail holes 5, 5a or the nail holes 6, 6a, that is, vertically or horizontally. Then, the position is adjusted so as to correspond to the lower part of the concrete product W, and after setting is completed, a nail is driven into one of the set of nail holes 5, 5a, 6, 6a which are not nailed, and fixed.

When the concrete product W is installed after the flat plate 2 is fixed, the positioning protrusions 7 and 7a on the flat portion 4 if the main body 1 is one, or the several main bodies 1 are stacked,
The positioning projections 7 and 7a on the flat portion 4 of the main body 1 disposed at the top thereof are fitted into the fitting holes 8 and 8a by the load of the concrete product W.
Depress to the side.

When a cutting root of a rod body such as a reinforcing bar protrudes from the installation surface, the protruding bar S is passed through the rebar insertion passage 13, and the reinforcing bar holding portions 14, 14a corresponding to the diameter of the protruding bar S are provided. ... is fitted and held.

Rebar holding portions 14, 14a corresponding to the diameter of the protruding rod S
… Insertion holes 17, 14a of the rebar holding parts 14, 14a
The elastic protruding pieces 16 and 16a are provided by the protruding rods S so that they can be inserted into the reinforcing bars.
When the protruding rod S is elastically deformed by being pressed against the wall surface side of the rebar 13, the resilient protruding pieces 16, 16 a.
Resiliently returns, presses the side surface of the protruding rod S on the side of the insertion port 17, 17a...

[0026]

In summary, according to the present invention, since the slopes 3 and 3a are provided at the edges of the flat plate 2 so as to be outwardly descending, the insertion side is not angular as in the prior art, so that it does not catch on the lower part of the concrete product. Insertion into the lower part can be done smoothly.

In the flat plate 2, nail holes 5, which are long in the vertical and horizontal directions,
Since 5a, 6 and 6a are symmetrically inserted through the left and right, respectively, when fixing to the installation surface, first find the place where the fixing is made, and one of the two sets of nail holes 5, 5a, 6, and 6a The nails are temporarily nailed, and the flat plate 2 is shifted vertically or horizontally, and the position is adjusted so as to correspond to the lower part of the concrete product W. Then, any one of the nail holes 5, 5a, 6, 6a not nailed is formed. Of 1
Since the nail can be driven into the set and fixed, it can be easily fixed at a desired position without being shifted from the lower part of the concrete product as in the related art.

Further, a pair of positioning projections 7 and 7a are provided on the surface of the flat plate 2, and fitting grooves 9 and 9a are formed on the outer periphery of the positioning projections 7 and 7a. 2, the fitting holes 8, 8a are provided on the back surface, and fitting ridges 10, 10a corresponding to the fitting grooves 9, 9a are formed on the inner periphery of the fitting holes 8, 8a. At this time, when the appropriate number of the main bodies 1 having an appropriate thickness are stacked, the positioning projections 7 and 7a of the lower main body 1 are connected to the upper fitting holes 8 and 8a.
, The fitting grooves 9, 9a of the positioning protrusions 7, 7a are fitted with the fitting ridges 10, 10a of the fitting holes 8, 8a, and the upper body 1 is easily positioned and joined to the lower side. The positioning protrusions 7, 7a are fitted into the fitting grooves 9, 9a with the fitting holes 8, 8a.
By the fitting of 10 and 10a, the piled state is that the upper level adjustment plate 1 is not always displaced from the lower side, and the main bodies 1 can be firmly joined together. The stacking does not collapse easily, the level adjustment work can be easily performed, and whether or not the main body 1 is perfectly joined is determined by the fitting ridges 10, 10a to the fitting grooves 9, 9a. It can also be confirmed by the sound generated when fitting.

Further, a reinforcing bar insertion passage 13 is formed by cutting from the edge of the flat plate 2, and the reinforcing bar holding portions 14, 14 a... In the depth direction, a large number of them are successively formed so as to be sequentially smaller in width, and a pair of left and right sides are respectively formed in front of the rebar holding portions 14, 14a... Toward the insertion openings 17, 17a. The elastic protruding pieces 16, 16a are obliquely provided on the wall surface of the reinforcing bar insertion passage 13, and the elastic protruding pieces 16, 16a are elastically pushed open by the insertion of the reinforcing bar. When the cutting root of the bar is protruding, the bar S can be passed through the reinforcing bar insertion passage 13 and fitted and held in one of the reinforcing bar holding portions 14, 14a corresponding to the diameter of the bar S. When the protruding bar S is fitted, the protruding bar S
Are elastically deformed so that the elastic protruding pieces 16, 16a are elastically pushed open.
a Reinforcement holding parts 14,
14a can be fitted into and inserted and held in this manner, the elastic protruding pieces 16, 16a.
a. Since the side surface of the side is pressed, it is possible to prevent the protruding bar S from coming off, so that the bar-shaped obstacle such as a reinforcing bar is not obstructed.
The level adjusting plate 1 can be easily fixed to a desired installation location in such a manner that the protruding rod S is easily fitted and hardly pulled out.

Therefore, according to the present invention, when adjusting the level of a concrete product, it is easy to insert it into the lower portion of the concrete product, to facilitate positioning during stacking and position adjustment during nailing, and there is a bar-shaped obstacle such as a reinforcing bar. In addition, it can be easily and firmly fixed, the work can be simplified, and the efficiency of concrete product laying work can be increased.

[Brief description of the drawings]

FIG. 1 is a plan view of a level adjusting plate of a concrete product according to the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a rear view of FIG. 1;

FIG. 5 is a right side view of FIG. 1;

FIG. 6 is a left side view of FIG. 1;

FIG. 7 is a sectional view taken along the line AA of FIG. 1;

FIG. 8 is a sectional view taken along the line BB of FIG. 1;

FIG. 9 is a sectional view taken along the line CC in FIG. 1;

FIG. 10 is a sectional view taken along line DD of FIG. 1;

FIG. 11 is a perspective view showing an elastic projection on one side.

FIG. 12 is a perspective view showing a modification of FIG.

FIG. 13 is a diagram illustrating a method of fixing a level adjustment plate.

FIG. 14 is a cross-sectional view showing a stacked state of level adjustment plates.

FIG. 15 is a view showing a state in which a level adjustment plate is installed below a concrete product.

[Explanation of symbols]

 2 flat plate 3, 3a inclined portion 5, 5a nail hole 6, 6a nail hole 7, 7a positioning protrusion 8, 8a fitting hole 9, 9a fitting groove 10, 10a fitting ridge 13 rebar insertion passage 14, 14a ... rebar Retaining parts 16, 16a ... Elastic protruding pieces 17, 17a ... Insertion port

Claims (2)

(57) [Claims] 1. A flat plate is provided with an inclined portion having an outward descending shape at an edge thereof, a long nail hole is vertically and horizontally pierced through the flat plate, and a pair of positioning projections are provided on a surface of the flat plate. Forming a fitting groove on the outer periphery of the positioning protrusion, and providing a fitting hole on the back surface of the flat plate corresponding to the positioning protrusion,
A level adjusting plate for a concrete product, wherein a fitting ridge corresponding to the position of the fitting groove is formed on an inner periphery of the fitting hole. 2. A reinforcing bar insertion passage is cut out from an edge of the flat plate, and a reinforcing bar holding portion having substantially the same width as a reinforcing bar having an appropriate diameter is formed in the reinforcing bar insertion passage in the depth direction of the reinforcing bar insertion passage so as to gradually decrease in width. A pair of left and right elastic protruding pieces are slopingly provided on the wall of the rebar insertion passage so as to face the insertion hole formed narrower than this in front of each rebar holding part. 2. The level adjusting plate for a concrete product according to claim 1, wherein the protruding piece is elastically pushed open by inserting a reinforcing bar.