JP4197391B2 - How to use concrete top edge spacer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete top spacer that is directly attached to a reinforcing bar without penetrating the floor and maintains the floor thickness and the level of the floor surface when constructing a concrete floor.
[0002]
[Prior art]
In conventional construction spacers of this type, as a marker for maintaining the floor thickness and the level of the floor when placing concrete, the reinforcing bars are welded vertically to the vertical bars or horizontal bars, or the reinforcing bars or bars are bound with binding wires. Is fixed vertically. However, causing a decrease in strength of the structure when welding the reinforcing bar. It is unstable when a reinforcing bar or bar is fixed with a binding wire . In addition, such as hoses and electrical cords of pouring work at vibrator of raw concrete fault Mutame to the rebar, the work is difficult. Moreover, it takes a lot of labor for the work to attach the steel bar cut to the length of the floor thickness by welding it vertically to the vertical and horizontal bars.
[0003]
[Problem to be Solved by the Invention]
The present invention has been made in view of the above problems, and its purpose is to be easily attached to a floor reinforcement assembled in a floor formwork, and to minimize structural defects in a concrete section as much as possible. The present invention provides a construction spacer that can reliably maintain the level of the surface. Further, in the conventional construction for the spacer of this type for reinforcing bars are projected vertically at a fired設作industry raw concrete, hoses and electrical cords vibrator to the rebar work entanglement resolve the difficult for, the work is to provide a construction for a spacer which can fall freely self-supporting.
[0004]
[Means for Solving the Problems]
In order to solve the above problems , a concrete top end spacer of the present invention includes a fixture formed of a U-shaped screw rod, a wing nut, and a washer for mounting on a reinforcing bar, and the U-shaped screw rod includes a spring or a soft material. It is characterized in that a round bar or screw rod for securely maintaining the floor thickness and the level of the floor surface is connected via the member, and that this round bar or screw rod can be pulled out from the spring or the soft member. To do. That is, in place of the fixture formed by threaded rod and wing nuts and washers of the U-shaped so as to attached to the reinforcing bars, Ru der which the floor thickness similar to or slightly longer surveying rod provided integrally.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. In FIG. 1, 1 is a construction spacer. In this construction spacer, first, a fixture 2 assembled with a U-shaped screw rod 3e , a wing nut 2a, and a washer 2b is attached to a floor bar (vertical bar A in the figure) , and is fastened and fixed. In this state, the surveying bar 3 has already protruded in the vertical direction, and the height is adjusted by moving the surveying bar member 3b up and down, and it is possible to accurately fix it with the nuts 3g above and below the member 3b. The surveying rod 3 is a surveying rod provided with a spring 3c that can freely fall and stand up, and the spring 3c is covered with a rubber-based tube 3f so that sand does not get entangled.
[0006]
The fixing tool 2 is formed by assembling a U-shaped screw rod 3e and a wing nut 2a and a washer 2b so as to be fixed to a reinforcing bar. The surveying bar 3 extends in the vertical direction from the reinforcing bar fixing part and is the same as or slightly longer than the floor thickness, and has a protective member 3a for preventing danger at the tip. The height can be adjusted by adjusting the member 3b up and down to set the surveying position. After setting, it can be fixed accurately by tightening with the nuts 3g above and below. The connection between the round bar or screw rod 3d and the U-shaped screw rod 3e is made by a spring 3c or a soft member and is fixed so that the surveying rod 3 can freely fall and stand independently. Member 3c is that not cover the member 3 c in the cylinder 3f of rubber so as not tangled sand in the case of the spring.
[0007]
As an example of use of this embodiment, as shown in FIG. 2, a U-shaped integrally formed fixing portion 2 is appropriately attached to a longitudinal bar A or a horizontal bar B previously arranged, and a reinforcing bar A or B is attached. Fasten with 2a. In this state, the floor thickness and the height of the floor surface can be accurately ensured by adjusting the height of the surveying bar 3 protruding in the vertical direction with the member 3b.
[0008]
The length of the round bar or the threaded rod 3d in the above survey rod is to change the bed thickness. Moreover, the said fixing tool 2 is a shape which can be used for both not only the outer diameter size of a vertical line and a horizontal line.
[0009]
【The invention's effect】
The present invention can be easily attached to the floor reinforcement assembled on the floor formwork with the above-described configuration, and the height of the concrete can be accurately ensured by adjusting the floor thickness and level or height. . The vertically protruding rebar in constructing a spacer for this type of conventional, although vibrator hoses and electrical cords in striking設作industry raw concrete Tsukutame work entanglement is difficult to, this problem, It can be solved by using a round bar or screw bar that can be freely tumbled and self-supported during work , and after the concrete is placed, the round bar or screw bar can be easily pulled out, so the top of the spacer can be removed from the top of the concrete. Will not be exposed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a construction spacer showing one embodiment of the present invention.
FIG. 2 is a partial cross-sectional view showing a usage state of a construction spacer according to one embodiment of the present invention.
FIG. 3 is a plan view, a front view, and a side view of a construction spacer according to the present invention .
FIG. 4 is an explanatory view showing a procedure for attaching the construction spacer according to the present invention .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Construction spacer 2 Fixing tool 3 Surveying rod A Longitudinal muscle B Lateral muscle C Floor muscle D Floor formwork

Claims (1)

In order to attach to a reinforcing bar, it is equipped with a U-shaped threaded rod, a wing nut and a washer and a fixing tool. The U-shaped threaded rod is securely held in place by a spring or a soft member. A method of using a concrete top end spacer to which a round bar or a screw bar is connected , wherein the round bar or the screw bar is pulled out from the spring or the soft member after placing the concrete. How to use spacers.

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