JP2002213049A - Reinforcing bar holder for intra-form reinforcing bar support and intra-form reinforcing bar support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intra-form reinforcing bar support and a reinforcing bar holder for the intra-form reinforcing bar support preventing a reinforcing bar holding section and the reinforcing bar support from being rotated against a reinforcing bar, with the reinforcing bar holding section of the intra-form reinforcing bar support kept holding the reinforcing bar, and preventing the reinforcing bar support from being largely inclined or overturned against a form or being moved in parallel with the reinforcing bar. SOLUTION: A plurality of lugs locked on the through rib of the held reinforcing bar to block the rotation of the intra-form reinforcing bar support against the reinforcing bar are provided on the inside face of the reinforcing bar holding section. At least one of the lugs is located near the left side of the through rib of the reinforcing bar, and at least another one is located near the right side of the through rib of the reinforcing bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing-bar holder and a reinforcing-bar-reinforcing device used for a reinforcing-bar-reinforcing device for supporting a reinforcing bar on a formwork when arranging reinforcing bars prior to concrete casting.

[0002]

2. Description of the Related Art This type of reinforcing bar support comprises an upper reinforcing member holding portion and a lower leg portion for stably maintaining the reinforcing member holding portion at a predetermined distance (height) from a mold. . The reinforcing bar holding portion elastically holds the reinforcing bar by sandwiching the reinforcing bar from both sides. In order to hold the rebar to the rebar holding section, the holding section is expanded by inserting the rebar using the slide guide or the like at the upper end of the rebar holding section to oppose the elasticity. It is limited to a size within which work can be performed. On the other hand, after the reinforcement and concrete filling are performed in the formwork, forced vibration is applied to the formwork, so the reinforcing bar supports are placed vertically, horizontally,
Or the force of the direction which combined them acts.

[0003] Therefore, a conventional reinforcing bar support in a formwork in which no special means is provided for the reinforcing bar holding portion is liable to rotate around the reinforcing bar and to move in parallel in the longitudinal direction of the reinforcing bar. When the reinforcing bar support rotates, it will incline or fall over the formwork
The cover of the concrete thickness is not guaranteed, and the parallel movement is remarkable especially when the reinforcing bars are arranged in the vertical direction, so that the specified spacing between the reinforcing bar supports in the form cannot be guaranteed.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to prevent a rebar holding portion of a rebar support member in a form from rotating with respect to a rebar while the rebar holding portion holds the rebar. Therefore, the reinforcing bar support does not largely tilt or fall over the formwork, and further, does not move parallel to the reinforcing bar. The purpose of the present invention is to provide a reinforcing bar holding device.

[0005]

[Means for Solving the Problems] On the inner surface of the rebar holding portion,
A plurality of projections are provided to stop the rotation of the reinforcing bar support in the formwork with respect to the reinforcing bar by engaging with the through ribs of the reinforcing bar to be held. At least one of the protrusions is located near the left side of the through-rib of the reinforcing bar. And at least one other is located near the right side of the through rib of the reinforcing bar. Further, the reinforcing bar holding device of the present invention has the same reinforcing bar holding portion as the reinforcing bar holding portion of the above-described reinforcing bar support.

[0006]

When the reinforcing bar is held by the reinforcing bar holding portion of the reinforcing bar support in the form constructed as described above, even if the reinforcing bar support in the form receives the turning power due to the vibration of the form, the reinforcing bar support is provided. A protrusion provided on the inner surface side of the holding portion is engaged with a through rib of the reinforcing bar (a protruding shape formed in both sides of the reinforcing bar in a longitudinal direction) to prevent rotation in either direction. Further, a leg for maintaining the reinforcing member holding portion at a predetermined distance (height) from the mold is attached below the reinforcing member holding device configured as described above, and the reinforcing member supporting member in the form is attached. If it is manufactured, it can be used in the same manner as the above-described reinforcing bar support in the formwork and exert a similar effect.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows a rebar holding device 3 of the present invention as a whole, having a rebar holding portion 2 at an upper portion and a mounting piece 6 at a lower portion. As shown in FIG. 2, the mounting piece 6 is attached to the leg 7, and is manufactured as a reinforcing bar support in a form including the reinforcing bar holder 3 and the leg 7. The attachment piece 6 is attached to the leg 7 by being embedded or inserted. 2 and 3 both show the reinforcing bar support in the formwork of the present invention. The upper part of the reinforcing bar support in the form in FIG. 2 is also the reinforcing bar holder 3 of the present invention, but is shown in FIG. The reinforcing-bar support in the form shown in FIG. 3 has the reinforcing-bar holding portion 2 and the leg 7 integrally formed, and does not have a reinforcing-bar holding device as an intermediate product as shown in FIG. Both the rebar holding device (FIG. 1) and the rebar support device in the formwork (FIGS. 2 and 3) have the rebar holding portion 2 for holding the rebar elastically from both sides and elastically holding the rebar. Is
The point is that special means is provided in the reinforcing bar holding portion.

FIGS. 4 to 9 are sectional views showing the reinforcing bar holding portion 3 of the present invention, the reinforcing bar holding portion 2 of the reinforcing bar support in the form of the present invention, and the reinforcing bar 1 held by the same. . FIG. 4-
In FIG. 9, the illustration of the mounting piece 6 and the leg 7 is omitted. When the reinforcing bar 1 is provided, the through ribs 4 (projections formed in both sides of the reinforcing bar in the longitudinal direction) are positioned at the height of the center axis of the reinforcing bar as shown in FIGS. (Hereinafter referred to as “rib surface”) formed by two through ribs located symmetrically with respect to
That. ) Is horizontal. However, when arranging the reinforcing bar while applying a bending force, the rib surface is often inclined. The inclination may reach up to about 45 °. 7 to 9 show a reinforcing bar whose rib surface is inclined by about 40 °.

On the inner side surface of the reinforcing bar holder 3 of the present invention and the reinforcing bar holding portion 2 of the reinforcing bar support in the form, near the left side of the through rib 4 of the reinforcing bar when holding the reinforcing bar 1 (this specification). In this example, the projection 5 is provided in the vicinity of “the vicinity in the left rotation direction side of the through rib”, and the projection 5 is provided in the vicinity of the right side (similarly, the vicinity in the right rotation direction side). They may be near two through ribs 4 at symmetrical positions (FIGS. 4, 5, 7, 8) or near one of the through ribs 4 (FIGS. 6, 9). . The term "near the through rib" means the position where the protrusion is locked to the side of the through rib, and the position where the protrusion is not locked but the protrusion is rotated by a small angle of the reinforcing bar holding portion. This includes a position slightly away from the through rib, which will be locked to the through hole. The rib surface after arrangement is often horizontal, but often inclined as described above. As shown in FIGS. 7 to 9, one of the through ribs 4 of the reinforcing bar in this state has moved upward and the other has moved downward. Therefore, as can be understood by comparing FIGS. 4 and 7, the position of the through rib where the rib surface is horizontal and the position of the through rib where the rib surface is inclined are different from each other with respect to the rebar holding portion 2. Becomes Therefore, in addition to the two protrusions near the left and right sides of the reinforcing ribs on the horizontal rib surface, two reinforcing bars are provided near the left and right sides of the reinforcing ribs on the inclined rib surface. The holding portion has a function of preventing the rotation of the rebar in the two positions. The position of the through rib of the reinforcing bar having the rib surface inclined in the middle between FIG. 4 and FIG. 7 is halfway between the above two positions, and a corresponding projection may be prepared. It is also possible to use a reinforcing-bar holding portion for the reinforcing bar on the horizontal rib surface provided at the “position slightly away from the through rib” or the reinforcing bar on the inclined rib surface in FIG. Therefore, the rib surface of the reinforcing bar arranged can have various inclinations from horizontal to about 45 °, but the arrangement of the projections of the reinforcing bar holding portion is inclined by about 40 ° to 45 ° with respect to the reinforcing bar on the horizontal rib surface. 3 sets (6 types)
) Can cover most. 4 to 9 for the reinforcing bar on the rib surface having a specific inclination (including horizontal).
As shown in FIG. 4 and 7 are located above the through rib 4 in the symmetrical position, FIGS. 5 and 8 are located below the through rib 4 in the symmetrical position, and FIGS. Here is an example.

A protrusion 5 shown in FIG. 1 (a portion showing only the outer surface of the holding portion in the drawing has a mark indicating the position of the protrusion on the inner surface is shown on the outer surface) is the reverse of FIGS. Total of inclination 6
The example provided in the position is shown. As shown in FIG. 1, in the case of the reinforcing bar holding portion 2 divided into two in the longitudinal direction of the reinforcing bar, two protrusions for through ribs on the horizontal rib surface among the protrusions 5 at the six positions (see FIG. 4). The two projections (FIG. 7) for the through ribs on the inclined rib surface (rotating from horizontal to right)
On the upper side of the holding portion 2 on the left side of the drawing and the lower side of the holding portion 2 on the right side of the drawing, two protrusions for through ribs on the inclined rib surface (from horizontal to left rotation) (reverse inclination in FIG. 7). Is provided on the upper side of the holding section 2 on the right side of the drawing and below the holding section 2 on the left side of the drawing, the projections can be provided in the divided holding section 2 without approaching each other, and the holding sections facing each other are provided. One pair and the other opposing holding part 1
There are no more than three pairs of projections, so that the effects of providing the projections on the strength and the like are not concentrated.

[0011]

According to the present invention having the above-described structure, even if the reinforcing bar support in the form receives vibration from the form, it is prevented from rotating with respect to the reinforcing bar so that the reinforcing member in the form can be larger than the form. Without tilting or overturning, the cover of the specified thickness of concrete is guaranteed, and the projection of the reinforcing bar holding portion of the present invention,
It also locks to the transverse ribs provided in a bamboo section on the peripheral surface of the reinforcing bar, preventing the reinforcing bar support in the form from moving in parallel to the reinforcing bar and the specified spacing between the reinforcing bars in the form. Guarantee.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rebar holding device of the present invention.

FIG. 2 is a perspective view of a reinforcing bar support in a mold according to the present invention.

FIG. 3 is a perspective view of another example of a reinforcing bar support in a mold according to the present invention.

FIG. 4 is a cross-sectional view in which a reinforcing bar is held by a reinforcing-bar holding portion of the present invention.

FIG. 5 is a cross-sectional view in which a reinforcing bar is held by the reinforcing-bar holding portion of the present invention.

FIG. 6 is a cross-sectional view in which a reinforcing bar is held by the reinforcing-bar holding portion of the present invention.

FIG. 7 is a cross-sectional view in which a reinforcing bar is held by the reinforcing-bar holding portion of the present invention.

FIG. 8 is a cross-sectional view in which a reinforcing bar is held by the reinforcing-bar holding portion of the present invention.

FIG. 9 is a cross-sectional view of a reinforcing-bar holding portion of the present invention holding a reinforcing bar.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcing bar 2 Reinforcing bar holding part 3 Reinforcing bar holding tool 4 Through rib 5 Projection 6 Mounting piece 7 Leg

Claims (2)

[Claims] A rebar holding device (3) having a rebar holding portion (2) for holding and resiliently holding a rebar (1) from both sides, wherein the rebar holding portion (2) is provided. On the inner surface, a projection (3) which is engaged with the through rib (4) of the reinforcing bar (1) to be held to prevent rotation of the reinforcing bar holding device (3) with respect to the reinforcing bar (1) and thus the reinforcing bar support in the formwork. 5) At least one of the projections is located near the left side of the through rib (4) of the reinforcing bar (1), and at least one of the protrusions is at least one of the through ribs (4) of the reinforcing bar (1). Rebar holder for a reinforcing bar support in a formwork, which is provided so as to be located near the right side of the 2. A reinforcing bar support in a form having a reinforcing bar holding portion (2) for holding and resiliently holding a reinforcing bar (1) from both sides, wherein the reinforcing bar holding portion (2) is provided. On the side surface, there are provided a plurality of projections (5) which are locked to the through ribs (4) of the reinforcing bar (1) to be held and prevent the rotation of the reinforcing bar support in the formwork with respect to the reinforcing bar (1). At least one of the projections is located near the left side of the through rib (4) of the reinforcing bar (1), and at least one of the projections is located near the right side of the through rib (4) of the reinforcing bar (1). Reinforcement support in formwork characterized by being