Top surface level setting jig

Abstract

To provide a jig for setting the top surface level of a concrete foundation during foundation concrete pouring work that is easy to use, efficient, and reusable, without requiring special technical skills. [Solution] A jig 1 for setting the top surface level of a concrete foundation used during foundation concrete pouring work, the jig 1 consists of a long horizontal member 2 used by being horizontally mounted on opposing upper end surfaces of a formwork, and a top surface setting shaft member 3 attached to the approximate center of the horizontal member 2 so as to be vertically movable up and down, a magnet 2a is provided near at least one end of the horizontal member 2 in the longitudinal direction L as a means of fixing to the formwork, and a top surface level receiving member 3a that allows the top surface setting shaft member 3 to move up and down is provided at the upper end of the top surface setting shaft member 3, and an indicator member 3b that serves as an indicator of the top surface level when pouring foundation concrete is provided at the lower end of the top surface setting shaft member 3.

Description

Technical Field

[0001] The present invention relates to a top level setting jig used for setting the top level, which is the upper end of a concrete foundation, when placing the foundation concrete of a building.

Background Art

[0002] Conventionally, in forming a concrete foundation for housing or the like, concrete having poor normal fluidity is placed up to a predetermined height, and then a leveling agent having a high cement ratio and high fluidity is poured up to the top level, so that the unevenness on the concrete surface is corrected to form a flat surface. In this working process, for setting and measuring the top level, which is the upper end of the concrete foundation, a screw, a nail, a magnet, or the like attached to a formwork may be used, or a leveling tool attached to a reinforcing bar or a leveling tool attached to the end of a formwork may also be used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] As described above, the setting of the top level of the concrete foundation used when placing the concrete foundation is performed by a screw, a nail, a magnet, or the like attached to a formwork. However, when using a screw or a nail, adjustment cannot be made unless the concrete has hardened to a certain extent, and when using a magnet, there are problems such as difficulty in accurately setting the height. Also, when using a leveling tool attached to a reinforcing bar or a leveling tool attached to the end of a formwork, it takes time and cost to attach them. For this reason, although jigs for leveling the top surface, such as those shown in Patent Documents 1 and 2, are available, their installation requires a certain level of technical skill and time, and furthermore, they are consumables that are embedded one by one in the concrete. To solve the above problems, this invention aims to provide a top surface level setting jig that allows for easy, efficient, and repeated setting of the top surface level of a concrete foundation without requiring special technical skills. [Means for solving the problem]

[0005] The top surface level setting jig of the present invention is a top surface level setting jig for concrete foundations used when pouring foundation concrete, and is characterized in that it comprises a long horizontal member used by being horizontally placed on opposing upper end surfaces of formwork, and a top surface setting shaft member attached to the approximately central part of the horizontal member so as to be vertically movable up and down, and that at least one of the ends of the horizontal member in the longitudinal direction is provided with a means for fixing to formwork, and the upper end of the top surface setting shaft member is provided with a top surface level receiving member that allows the top surface setting shaft member to move up and down, and the lower end of the top surface setting shaft member is provided with an indicator member that serves as an indicator of the top surface level when pouring foundation concrete. [Effects of the Invention]

[0006] The top surface level setting jig of this invention has a simple structure that does not require special technical skills, making it easy to use and allowing for accurate setting of the top surface level. Furthermore, since the top surface level setting jig of this invention is not a consumable item, it has the advantage of being able to be used repeatedly at other sites, thus significantly reducing costs. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view of the top surface level setting jig according to the present invention. [Figure 2] This is a plan view of the top surface level setting jig according to the present invention. [Figure 3]This is a right side view of the top surface level setting jig according to the present invention. [Figure 4] This is a perspective view of the top surface level setting jig according to the present invention. [Modes for carrying out the invention]

[0008] The embodiments for implementing the top surface level setting jig according to the present invention will be described below with reference to Figures 1 to 4. 1 is a top surface level setting jig, consisting of a long horizontal member 2 used by being horizontally mounted on the opposing upper end surfaces of the formwork, and a top surface setting shaft member 3 that is attached to the approximate center of the horizontal member 2 so as to be vertically movable up and down. Magnets 2a are provided near both ends of the horizontal member 2 as means of fixing to the formwork, and a top surface level receiving member 3a is provided at the upper end of the top surface setting shaft member 3 to allow the top surface setting shaft member 3 to move up and down, and an indicator member 3b is provided at the lower end of the top surface setting shaft member 3 to serve as an indicator of the top surface level when pouring the concrete foundation. In this embodiment, as a means of fixing to the formwork, a magnet 2a is used as described in claim 6, which allows for easy one-touch fine adjustment and offers good workability. However, other fixing devices, such as mechanical clamps, may also be used. Furthermore, although this fixing means is provided near both ends in this embodiment, it may be provided only near one end.

[0009] In this embodiment, the cross-sectional shape of the horizontal member 2 in the width direction W is U-shaped, but as described in claim 2, it may be rectangular, L-shaped, or H-shaped. The material is not particularly limited, although steel, stainless steel, aluminum, etc., are suitable. Furthermore, in this embodiment, the top surface setting shaft member 3 uses a fully threaded shaft member as described in claim 3. Using this fully threaded shaft member makes it easier to attach the top surface level receiving member 3a and the support member 3b, which are provided at the upper and lower ends, respectively. As described in claim 4, if a cap nut or UFO nut is used for the top level receiving member 3a, concrete debris will be less likely to accumulate. Also, as described in claim 5, a countersunk screw is used for the indicator member 3b, and it is screwed into the lower end of the top level setting shaft member 3 to serve as an indicator mark for the top level.

[0010] Next, the method of using the top surface level setting jig 1 according to the present invention will be explained. First, the horizontal member 2 of the top surface level setting jig 1 is placed on the upper surface of the formwork of the foundation concrete at approximately a right angle to the formwork. The horizontal member 2 is fixed to the formwork with a single touch by magnets 2a provided near its longitudinal end, simply by being placed on the formwork. Next, in this state, the level of the indicator member 3b, which is attached to the lower end of the top surface setting shaft member 3, is measured using a laser level or the like, and the top surface level receiving member 3a is rotated to adjust the indicator member 3b so that it is at the predetermined top surface level. This top surface level setting adjustment work is performed at predetermined intervals of the formwork using multiple top surface level setting jigs 1. After the above-mentioned adjustment work to set the top level, a foundation concrete with slightly low fluidity is poured into the formwork up to the vicinity of the support member 3b, and then a leveler with a high cement ratio and high fluidity is poured up to the top level, i.e., the support member 3b. After the foundation concrete has been poured, the top level setting jig 1 is removed from the formwork. Thus, the top surface level setting jig 1 of this invention has the advantage of being reusable at other sites, etc., rather than being a consumable item like conventional top surface leveling tools, thus significantly reducing costs. [Explanation of symbols]

[0011] 1. Top surface level setting jig 2 Horizontal members 2a Magnet (means for fixing to the formwork) 3. Top surface setting shaft member 3a Top surface level support member 3b Indicator member L Longitudinal direction W (width direction)

Claims

1. A jig for setting the top surface level of a concrete foundation used during foundation concrete pouring work, the jig comprising a long horizontal member used by being horizontally mounted on opposing upper end faces of a formwork, and a top surface setting shaft member attached to the approximately central portion of the horizontal member so as to be vertically movable up and down, wherein at least one end near the longitudinal end of the horizontal member is provided with a means for fixing to the formwork, and the upper end of the top surface setting shaft member is provided with a top surface level receiving member that allows the top surface setting shaft member to move up and down, and the lower end of the top surface setting shaft member is provided with an indicator member that serves as an indicator of the top surface level when pouring foundation concrete.

2. The top surface level setting jig according to claim 1, characterized in that the cross-sectional shape in the width direction of the horizontal member is one of a rectangle, a U-shape, an L-shape, or an H-shape.

3. The top surface level setting jig according to claim 1, characterized in that the top surface setting shaft member is a fully threaded shaft member.

4. The top surface level setting jig according to claim 1, characterized in that the top surface level receiving member is either a cap nut or a UFO nut.

5. The top surface level setting jig according to claim 1, characterized in that the indicator member uses a countersunk screw.

6. The top surface level setting jig according to claim 1, characterized in that the fixing means uses a magnet.

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