JP2507457B2 - Reinforcing bar holder for concrete products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a holder for supporting a reinforcing member made of a reinforcing steel, which is embedded in a concrete product and reinforces the concrete product, away from a concrete product manufacturing formwork. It is a thing.

(Prior Art) Generally, a reinforcing member embedded in a concrete product such as a U-shaped groove is formed in a mesh shape by connecting a plurality of reinforcing bars vertically and horizontally, and the mesh-like reinforcing member is a mold for manufacturing a concrete product. The reinforcing bar holder for supporting the frame apart from the frame engages with the vertical and horizontal reinforcing bars at the intersection of the vertical and horizontal reinforcing bars. The reinforcing bars in one row are fitted on the reinforcing bars from the lower side, and the reinforcing bars in the other row are pressed from the upper side. As a result, the reinforcing bar holder can be relatively firmly attached to the vertical and horizontal reinforcing bar rows, and the mesh reinforcing member can be supported separately from the form frame.

(Problems to be Solved by the Invention) However, when the direction of the rebar row externally fitted by the rebar holder from the lower side and the flow direction of the cement flowed in are substantially perpendicular to each other, There is a problem that the reinforcing member may not be supported at its original position when such rotation occurs.

Configuration of the Invention (Means for Solving the Problems) Therefore, in the present invention, a net-like reinforcing member formed by vertically and horizontally connecting a plurality of upper reinforcing bars and a lower reinforcing bar at the time of manufacturing a concrete product is held. And, a hook-like position regulation is provided with a retaining recess formed on the upper part of the supporting leg to form a support recess for externally fitting and supporting the lower reinforcing bar from below and pressing the upper reinforcing bar intersecting the lower reinforcing bar from above. In the process of forming the pieces on both sides of the support recess at a position above the support recess, and rotating the support leg with the hook-shaped position regulating pieces engaged with the upper rebar, the support recess is moved to the lower rebar. It was forced to fit into.

(Effect) That is, when the reinforcing bar row fitted in the supporting recess is substantially coincident with the flow direction of the poured cement, the rotation center axis of the reinforcing bar holder and the cement flow direction do not intersect at right angles, and the flow of the poured cement flows. The reinforcing bar holder will not rotate due to the force. Therefore, the reinforcing member is supported by the reinforcing bar holder so as to be separated from the mold at a regular position, and the reinforcing member at the time of cement hardening is embedded at the original position separated from the mold.

Particularly, in this invention, since the hook-shaped position restricting piece is hooked so as to press down the upper reinforcing bar from the upper side, the hook-shaped position restricting piece exerts an engaging force on the upper reinforcing bar when the support leg is rotated. Since it is pressed in the increasing direction, the turning operation is surely performed. Further, since the rotation of the supporting portion can be performed with a large external force, when the supporting concave portion is made of an elastic material, the elastic force of the supporting concave portion is increased so as to increase the fitting strength of the supporting concave portion to the upper reinforcing bar. Can be improved.

(Example) Hereinafter, one example which materialized the present invention is described based on a drawing.

The reinforcing bar holder of this embodiment is integrally formed of synthetic resin, and the pair of left and right support legs 1 and 2 are connected in an open state by a pair of upper and lower connecting bars 3 and 4 having different lengths. , Reinforcing ridges 1a and 2a are provided on the opposing surfaces of both supporting legs 1 and 2.
Are formed in the longitudinal direction of the support legs 1 and 2. A front semicircular support recess 5 is provided between the upper ends of both support legs 1 and 2, and an intermediate stand portion is provided on both left and right ends of the support recess 5.
6,7 are erected. Pressing pieces 8 and 9 are connected to the inner side surfaces of the upper ends of both the intermediate stand portions 6 and 7 so as to extend downwardly above the supporting recess 5, and the tips of the pressing pieces 8 and 9 are supported separately from each other. It is set so as to be located within the arc radius region of the recess 5. Introducing notches 8a, 9a are formed in the front and rear one side areas on the opposing surfaces of both pressing pieces 8, 9, and the interval between both notch portions 8a, 9a is slightly larger than the remaining opposing surface areas. There is. Position control pieces 10, 11 are formed on the outer surfaces of the upper end portions of both the intermediate stand portions 6, 7 so as to project forward from the introduction notch portions 8a, 9a side. Shift stopper pieces 10a, 11a are formed on the tip end portion, and reinforcing projections 10b, 11b are formed on the upper surfaces of the position restricting pieces 10, 11 in the longitudinal direction of the position restricting pieces 10, 11.

FIG. 2 shows a state in which the reinforcing bar holder of this embodiment is attached to the reinforcing member 12 for the U-shaped groove. The reinforcing member 12 is configured by welding a plurality of linear rebars 13 arranged in parallel in the front-rear direction and a plurality of bent rebars 14 arranged in the horizontal row in the vertical direction. , When manufacturing U-shaped groove, bent bar 14
Is on the upper side, and the linear reinforcing bar 13 is on the lower side. Reinforcement members 12
In order to attach the reinforcing bar holder of this embodiment to, the reinforcing bar holder is held obliquely so that the position control pieces 10 and 11 face upward as shown by the solid line in FIG. The notches 8a and 9a of the pressing pieces 8 and 9 are pressed against the lower surface side of the lower reinforcing bar 14 in the vicinity of the intersection with 14. When the entire reinforcing bar holder is pushed up in this state, both pressing pieces 8 and 9 are expanded against their elasticity, and the lower reinforcing bar 14 is inserted into the supporting recess 5. Next, when the reinforcing bar holder is rotated in the clockwise direction while the lower reinforcing bar 14 is pressed against the inner bottom surface of the supporting recess 5, the lower surfaces of both pressing pieces 8 and 9 of the upper reinforcing bar 13 bordering on the intersection. While being pressed against the left and right upper surfaces, the lower rebar 14 is completely fitted into the support recess 5, and the tips of the pressing pieces 8 and 9 are press-bonded to the upper surface of the lower rebar 14. As a result, the lower reinforcing bar 14 is externally fitted and supported from the lower side by the cooperation of the supporting recess 5 and the two pressing pieces 8 and 9, and the position regulating pieces 10 and 11 press the upper reinforcing bar 13 from the upper side. In this pressed state, the upper rebar
13 is positioned between the intermediate stand portions 6 and 7 and the shift preventing pieces 10a and 11a, and the shift of the reinforcing bar holder is prevented.

The reinforcing member 12 to which the reinforcing bar holder is attached is placed on the U-groove structure mold 15 through the reinforcing bar holder as in the conventional product, and the cement is poured between the molds 15 and 16. Be done.
The cement poured between the molds 15 and 16 is the upper rebar 13
Flows in the column direction, and this flow force acts on the reinforcing bar holder attached to the intersection of the upper reinforcing bar 13 and the lower reinforcing bar. However, since both position restriction pieces 10 and 11 press the left and right upper surfaces of the upper reinforcing bar 13 with the intersection as a boundary, the reinforcing bar retainer is centered on the lower reinforcing bar 14 regardless of the flow direction of the poured cement. Reinforcing member that does not rotate as
12 is separated from the mold 15 at a regular position and stably held.

Effects of the Invention As described in detail above, the present invention is intended for a reinforcing bar holder used when the poured cement flows exclusively in the column direction of the reinforcing bar to be the upper side during the production of concrete products, and the lower side reinforcing bar from the lower side. Support recesses formed on the upper portions of the support legs for external fitting support, and support recesses formed on both sides of the support recesses above the support recesses so as to press down the upper rebars intersecting the lower rebars from above. A hook-shaped position restricting piece having a disengagement prevention piece, and the support recess is forced to the lower reinforcing bar in the step of rotating the support leg with the hook-shaped position restricting piece engaged with the upper reinforcing bar. Since they are fitted together, the rotation of the reinforcing bar holder due to the flow force of the pouring cement flowing in the row direction of the upper reinforcing bar is avoided, and it is possible to stably hold the reinforcing member composed of the upper and lower reinforcing bar rows. Play.

In particular, in this invention, since the hook-shaped position regulating piece is hooked on the upper side of the upper reinforcing bar when the supporting leg is rotated, the position regulating piece presses in the direction of increasing the engaging force to the upper reinforcing bar. Therefore, the turning operation can be performed reliably and smoothly. Further, since the rotation of the support leg can be performed with a large external force, when the support recess is formed of an elastic material, the elasticity of the support recess itself is increased so as to enhance the fitting strength of the support recess to the upper reinforcing bar. You can improve your strength.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment embodying the present invention, FIG. 2 is a front sectional view showing a state in which a reinforcing bar holder is attached to a reinforcing member composed of upper and lower reinforcing bar rows, and FIG. 3 shows an attaching method. It is a side view shown. Support legs 1 and 2, support recess 5, pressing pieces 8 and 9, position regulating pieces 10 and 11, shift preventing pieces 10a and 11a, reinforcing member 12, upper reinforcing bar 1
3, lower rebar 14.

Claims (1)

(57) [Claims] 1. A reinforcing bar holder for supporting a net-like reinforcing member (12) formed by vertically and laterally connecting a plurality of reinforcing bars (13) on the upper side and reinforcing bars (14) on the lower side during the production of concrete products. A supporting leg portion (1, 2), a supporting recess (5) formed in an upper portion of the supporting leg portion (1, 2) so as to externally support the lower rebar (14) from below, Detachment prevention pieces (10a, 11a) formed on both sides of the support recess (5) at a position above the support recess (5) so as to press the upper rebar (13) intersecting with the side rebar (14) from above. And a hook-shaped position restricting piece (10, 11) provided with the support recess (5), the hook-shaped position restricting piece (10, 11) is connected to the upper rebar (1).
Reinforcing bar retainer for concrete products, characterized in that it is forcibly fitted to the lower reinforcing bar (14) in the step of rotating the supporting leg parts (1, 2) while engaging with 3). .