JP2008280840A - Concrete top end spacer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer for construction to be easily installed on a floor reinforcement and a beam reinforcement assembled on a floor formwork and capable of certainly holding floor thickness and a horizon of a floor surface. <P>SOLUTION: It is constituted to integrally provide a standard bar to certainly hold the floor thickness and the horizon on a proper point of a fixture formed of a U shaped screw rod 3e, a butterfly nut 2a and a washer 2b to install on the steel reinforcements A, B. The bar is structured to freely fall and to support itself by connecting its upper and lower parts by a spring or a soft member in consideration of its safety. Additionally a rubber cylinder to prevent entanglement of sand on the spring at the time of depositing concrete is installed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a construction 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 floor mainly of a concrete structure.

  In a conventional construction spacer of this type, a reinforcing bar or a bar is welded perpendicularly to a vertical bar and a horizontal bar, or a reinforcing bar or a bar is fixed with a binding wire. When welded to a reinforcing bar, the strength of the structure is lowered, and when the reinforcing bar or bar is fixed with a binding wire, it is unstable, and the work of placing the ready-mixed concrete becomes difficult because the hose and electric cord of the vibrator are entangled. In addition, a steel bar cut to the length of the floor is attached by welding vertically to the vertical and horizontal bars, but this requires a lot of work.

  The present invention has been made in view of the above problems, and its purpose is to be easily attached to the floor reinforcement assembled in the floor formwork, and to minimize structural defects in the concrete section as much as possible. It is intended to provide a construction spacer capable of reliably maintaining the level of the surface. In addition, in this type of conventional construction spacers, reinforcing bars are discharged, and the concrete hose and electric cord are entangled in the placement of ready-mixed concrete, making it difficult to work. It is intended to provide a construction spacer that can fall over and stand on its own.

  In order to solve the above object, in the present invention, a surveying bar which is the same as or slightly longer than the floor thickness is integrally provided at an appropriate position of a fixture formed of a U-shaped threaded rod, a wing nut and a washer to be attached to a reinforcing bar.

  The present invention can be easily attached to the floor reinforcement assembled on the floor formwork with the above-described configuration, and can accurately secure the height of the concrete by marking the floor thickness and level or height. . In addition, in this type of conventional construction spacers, reinforcing bars are discharged, and the concrete hose and electric cord are entangled in the placement of ready-mixed concrete, making it difficult to work. It is intended to provide a construction spacer that can fall and stand on its own.

  In the construction spacer according to the present invention, first, a fixing tool assembled with a U-shaped screw rod, a wing nut and a washer is attached to the floor bar, and is fastened and fixed. In this state, the surveying rod has already protruded in the vertical direction, and the height was measured by moving the surveying rod member 3b up and down, and it was possible to accurately fix it with the nuts above and below the member 3b. The surveying rod 3d is a surveying rod provided with a spring 3c that can freely fall over and stand on its own, and is fitted with a member 3f with a rubber tube so that sand does not get entangled.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. Reference numeral 1 denotes a construction spacer. Reference numeral 2 denotes a fixture, which 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. 3 has a bar that is the same as or slightly longer than the floor thickness in the vertical direction to the reinforcing bar fixing part, and is provided with a protective member 3a for preventing danger at the tip. The height can be adjusted up and down 3b to set the surveying position, After setting, it can be fixed accurately by tightening with 3g above and below. The connection between 3d and 3e is fixed by a spring or a soft member, so that it can freely fall and stand on its own. When the member 3c is a spring, it is a surveying rod with a member 3f attached with a rubber tube so that sand is not entangled.

  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 reinforcing bar A or B that has been previously arranged, and 2a is attached to the reinforcing bar A or B. Tighten with to fix. In this state, the floor thickness and the height of the floor surface can be accurately ensured by marking the height 3b on the surveying rod 3 protruding vertically.

In addition, the above surveying rod is a round bar or screw rod, and the length is changed according to the floor thickness. In addition, the vertical muscle fixing portion and the horizontal muscle fixing portion are not limited to the outer diameter size of the vertical and horizontal muscles, and can be used in combination.

The perspective view of the spacer for a construction which shows one Example of this invention. 1 is a partial cross-sectional view showing one embodiment of the present invention. Plan view, front view, side view of construction spacer of this invention Installation procedure of construction spacer of this 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 the rebar, a standard round bar or screw rod that holds the floor thickness and the level of the floor securely is integrated in the right place of the fixture formed by U-shaped screw rod, wing nut and washer. In consideration of safety work, the rod or screw rod is fixed to the middle of the rod with a spring or a soft member, and the reference rod freely falls and becomes self-supporting. In the case of, a construction spacer characterized by wearing a rubber-based cylinder that prevents sand from getting entangled.

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