JP3701729B2 - Level adjustment jig for concrete products and concrete products - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a level adjusting jig for a concrete product that is mounted on the lower surface of a concrete product and performs a level adjusting function when the concrete product is installed.
[0002]
[Prior art]
Conventionally, methods for level adjustment when installing concrete products are disclosed in, for example, Japanese Patent Publication No. 62-48018 and Japanese Patent Laid-Open No. 4-34143. In the former case, a nut-like insert having an internal thread is embedded in the bottom surface of a concrete product, and when installing, a bolt-like leg is screwed to this insert, and the leg is rotated to rotate the leg. This adjusts the protruding length of the concrete and adjusts the level of the concrete product. What is shown in the latter is a level adjustment spacer that is used to adjust the level by laying an appropriate number of thin spacers under the concrete product.
[0003]
[Problems to be solved by the invention]
The level adjustment method using the nut-shaped insert and the bolt-shaped leg is as follows. (1) The cost of the insert and the leg is high. (2) Since the insert embedded in the concrete product has a female screw inside, There is a problem that it is necessary to manage so that concrete scraps and the like do not adhere to the screw, and (3) the level adjustment is performed by rotating the leg, so that the work is complicated. On the other hand, when the latter spacer is used, the concrete product is lifted many times and replaced until the appropriate number of spacers is reached. (1) The adjustment work is complicated, especially in the case of large concrete products, (2) There is a problem that it is very dangerous because the spacer is adjusted by raising and lowering the concrete product several times with a crane.
[0004]
The level adjustment jig of the present invention solves such problems, and by using this, it is easy to mount and maintain on a concrete product, and to perform level adjustment work efficiently and safely. Can do.
[0005]
[Means for Solving the Problems]
The invention of claim 1 of the present application comprises an embedded portion embedded in concrete and an adjusting portion exposed from the concrete, and the adjusting portion has an opening for inserting a wedge, and both side portions thereof are about the degree of wedge insertion. It is a level adjustment jig for a concrete product characterized in that it is an expansion / contraction part that expands and contracts to change the height of the adjustment part. The invention of claim 2 of the present application is a concrete product characterized in that the level adjuster according to claim 1 is embedded on the bottom surface so that the embedded portion is embedded and the adjusting portion is exposed. .
[0006]
The material of the level adjusting jig of the present invention may be a commonly used material such as plastic or metal. However, when an elastic material such as plastic is used, it is not only inexpensive but also stacked when transporting or stocking concrete products. If there is no risk of damaging the concrete product.
[0007]
Embodiment
Hereinafter, the present invention will be described in detail with reference to the drawings of the embodiments. 1 is a cross-sectional explanatory view of the level adjustment jig 1 according to the embodiment in use, FIG. 2 is also an explanatory view of the use state, FIG. 3 is an illustration of mounting the level adjustment jig 1, and FIG. FIG. 5 to FIG. 7 are perspective views of other embodiments of the installed concrete product in a stock state.
[0008]
In FIG. 1, the upper stage shows a state before the wedge is driven, the lower stage shows the state where the wedge is driven and the level adjustment is completed, and the left and right sides show cross sections having different directions. A level adjusting jig 1 shown in FIG. 1 is made of plastic and includes an embedded portion 2 and an adjusting portion 3. The embedded portion 2 is formed with a triangular protrusion 2a, which is a resistance against pulling. The adjustment part 3 is substantially a square tube, and has an opening 5 for inserting a wedge, and both sides of the adjustment part 3 form a stretchable part 4 detoured in a semicircular arc shape.
[0009]
The level adjusting jig 1 is attached to the lower surface of the concrete product C as shown in FIG. The left side of FIG. 3 is a U-shaped side groove block, and the right side is a variable gradient side groove block, both of which are manufactured by pouring concrete into a formwork K in an upside down state. After pouring the concrete into the formwork K and leveling the upper surface (corresponding to the bottom surface of the product), the embedded portion 2 of the level adjusting jig 1 is mounted there with the embedded adjusting portion 3 exposed in the concrete. . If the concrete hardens as it is, installation is completed.
[0010]
The concrete product C equipped with the level adjusting jig 1 is stacked and stocked as shown in FIG. 4, but the precious level adjusting jig 1 prevents the concrete surfaces from contacting and discoloring, Moreover, since it acts also as a buffer material, the rootstock conventionally inserted between products for these purposes becomes unnecessary.
[0011]
The concrete product C equipped with the level adjusting jig 1 transported to the site is inserted with the end of the wedge 6 into the opening 5 of the jig 1 and lowered to the installation place by a crane or the like. This state is shown in the upper part of FIG. After that, adjust the level while hitting the wedge with a hammer. When the wedge is struck and enters the opening 5 deeply, the expansion / contraction part 4 extends, the height of the adjustment part 3 increases, and the concrete product rises. If the level of the concrete product rises and the level is maintained appropriately, the level adjustment work is finished. Thereafter, mortar or the like is filled between the bottom surface of the concrete product and the discarded concrete 7 as necessary and fixed.
[0012]
The wedge 6 is inserted in the opening of the level adjusting jig 1 from the outside of the concrete product C as a rule as in the U-shaped side groove block shown on the left side of FIG. 2, but like the variable gradient side groove block shown on the right side of the figure. In addition, in the case of a large concrete product having a large space inside, it can be inserted from the inside.
[0013]
The shape of the buried portion of the level adjusting jig of the present invention is not limited by the shape of the embodiment as long as it is easy to bury in the concrete and has sufficient strength against pulling out and breaking. In addition, the overall shape of the adjustment portion, the shape of the opening and the expansion / contraction portion are not restricted by the above embodiment, and in short, when the wedge is made to enter the opening deeply, it acts to increase the height of the adjustment portion. It's all right.
[0014]
5 to 7 show other embodiments having different adjustment units. In each of these embodiments, the shape of the embedded portion is the same as that of the above embodiment (not shown), and only the shape of the adjusting portion is different. The level adjustment jig 10 in FIG. 5 includes an embedded portion 11 and an adjustment portion 12. The adjustment unit 12 has an opening 14 and an expansion / contraction part 13. The expansion / contraction part 13 is formed thinner than the other parts. When the wedge enters the opening part 14 deeply, the expansion / contraction part 13 is elongated due to the elasticity of the material (plastic). As a result, the height of the adjustment part 12 is increased. Increase. The level adjustment jig 20 in FIG. 6 includes an embedded portion 21 and an adjustment portion 22. The adjustment unit 22 has an opening 24 and an expansion / contraction part 23. The stretchable portion 23 has a shape that is bent into a square shape, and when the wedge is made to enter deeply from the opening 24, the square shape of the stretchable portion 13 is deformed to be long in the vertical direction due to elasticity, and as a result, the height of the adjustment portion 12 is increased. Increase. Since the bottom surface of the adjusting portion 22 is formed in a rib shape, friction is increased when the concrete products equipped with the jig are stacked, and slipping can be prevented. The level adjustment jig 30 in FIG. 7 includes an embedded portion 31 and an adjustment portion 32. The adjustment part 32 has an opening 34 and an expansion / contraction part 33. When the wedge is made to enter deeply from the opening 34, the semicircular member on the side of the opening 34 is elastically deformed up and down to increase the height of the adjusting portion. The width of 35 expands, and the member at the bottom of the opening 34 gradually moves to the side due to elasticity, and the height of the adjusting portion further increases. Therefore, it can be said that the expansion / contraction part 33 in the present embodiment is the entire member on the side and bottom of the opening.
[0015]
The present invention is not limited to the side groove blocks described in the embodiments, but can be applied to various concrete products such as box culverts, manhole blocks, waterway blocks, retaining wall blocks, and the like.
[0016]
【The invention's effect】
The level adjusting jig of the present invention is easy to attach to a concrete product and does not have a screw portion, so that it is easy to maintain and cost. The level adjustment work strikes the wedge, so it is efficient and safe without the need to rotate the legs or lift the concrete product frequently. Furthermore, when transporting or stocking concrete products equipped with this, the level adjustment jig can perform the function of the rootstock, eliminating the need for the rootstock that was required in the past, further improving work efficiency and reducing costs. realizable.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view of a level adjustment jig 1 in use.
FIG. 2 is an explanatory diagram of a usage state of the level adjustment jig 1;
FIG. 3 is an explanatory diagram of mounting of the level adjustment jig 1;
FIG. 4 is an explanatory diagram of a stock state of a concrete product C on which the level adjusting jig 1 is mounted.
5 is a perspective view of the level adjusting jig 10. FIG.
6 is a perspective view of the level adjustment jig 20. FIG.
7 is a perspective view of the level adjustment jig 30. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Level adjustment jig 2 Embedment part 3 Adjustment part 4 Expansion / contraction part 5 Opening part 6 Wedge 7 Waste concrete 10 Level adjustment jig 11 Embedment part 12 Adjustment part 13 Expansion / contraction part 14 Opening part 20 Level adjustment jig 21 Embedment part 22 adjustment part 23 expansion and contraction part 24 opening part 25 bottom face 30 level adjustment jig 31 embedding part 32 adjustment part 33 expansion and contraction part 34 opening part 35 slit C concrete product K formwork

Claims (2)

And the buried portion embedded in the concrete, consists of a adjustment portion exposed from the concrete, the adjusting unit has an opening for inserting the wedge, the height of the side portions is stretchable in about insertion of the wedge adjuster Concrete product level adjustment jig, characterized by a variable expansion and contraction part   A concrete product, wherein the level adjuster according to claim 1 is mounted on the bottom surface by embedding the embedding portion and exposing the adjustment portion.

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