JPH0613291Y2 - Spacer retainer for rebar - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is a rebar used for maintaining an appropriate distance between a heat insulating material or a formwork and a reinforcing bar in a construction of a heat insulating material or a concrete driving work. The present invention relates to a space holder.

(Prior Art) Conventionally, for example, when a heat insulating material is applied to a wall or the like, in order to maintain an appropriate distance between the heat insulating material and the reinforcing bar provided in the formwork,
A wheel-shaped spacing holder is used, and a cylindrical inner ring portion formed at the center of the holder is fitted to a reinforcing bar to attach the holder at a predetermined position of the reinforcing bar.

(Problems to be solved by the invention) However, the reinforcing bar used for construction has an error in processing accuracy, and the size of its diameter varies widely. Therefore, if the outer diameter of the reinforcing bar is larger than the inner diameter of the inner ring portion due to the error, the holder cannot be attached to the reinforcing bar, and if the outer diameter of the reinforcing bar is smaller than the inner diameter of the inner ring portion,
Even if the holder falls down from the attached reinforcing bar and the reinforcing bar has a small diameter and it is temporarily attached to the reinforcing bar, it will easily fall off due to vibration during construction, etc. There was a problem that it was useless.

The present invention was devised in view of these points,
It is an object of the present invention to provide a rebar spacing holder that can be reliably attached even to rebars having large and small variations in diameter due to processing accuracy errors.

(Means for Solving Problems) The present invention has the following configuration in order to effectively achieve the above object. That is, a tubular inner ring portion that is partially opened,
An outer ring part supported via ribs extending radially from the inner ring part, and a part of the outer ring part is notched, and both ends of the notch extend toward the vicinity of the opening of the inner ring part and the distance between the facing surfaces is the inner ring. In the rebar spacing retainer consisting of an arm portion gradually narrowed toward the portion and a reinforcing bar pressing piece formed at the tip of the arm, the reinforcing bar pressing piece (9) (9) A flexible fin piece having a suitable height is integrally formed on the inner peripheral surface of the inner ring portion (4) facing each other.

(Operation) The holder is fitted from the side of the reinforcing bar provided at an appropriate interval from the formwork. That is, the holder is moved from the cutout portion of the outer ring portion to the reinforcing bar side along both arm portions, and in front of the opening of the inner ring portion, the ends of the narrowed arm portions are expanded by contacting with the reinforcing bars, The holder is fitted to the reinforcing bar through the opening of the inner ring portion. At this time, the fin pieces formed on the inner ring part by the reinforcing bars fitted in the inner ring part are bent, and the enlarged arms are returned to their original state when the reinforcing bars are fitted in the inner ring part. Of the pressing piece formed on the tip of
The holder is fitted and held on the reinforcing bar by the wall thickness of the bent fin and the elastic force.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, (1) is a rebar spacing retainer according to an embodiment of the present invention, wherein the retainer (1) is a partially cut-out wheel-shaped synthetic resin. Is formed by. Further, a fin piece (2) is formed at the center of the holder (1) so as to bend the holder (1) so that it can be securely attached to the reinforcing bar (A).

Therefore, more specifically explaining the holder (1), in the central portion of the holder (1), the wall (3) is opened along the center line (Y) at a position ⅓ of the circumference. The formed cylindrical inner ring portion (4) is formed. The inner diameter of the inner ring portion (4) is formed to be slightly larger than the maximum diameter due to a processing accuracy error of the reinforcing bar (A). Further, the inner peripheral wall at the center in the longitudinal direction of the inner ring portion (4) is at a right angle to the center line (Y), and along the inner peripheral wall, half the radius of the inner ring portion (4) toward the center line (Y) side. A thin and flexible fin piece (2) is formed protruding. When the reinforcing bar (A) is fitted into the central through hole (11) formed by the inner ring part (4) and a pressing piece part (9) described later, the fin piece (2) is bent by the fin bar (A). The piece (2) is bent, and the retainer (1) is firmly fitted to the reinforcing bar (A) by the wall thickness of the fin piece (2) and the elastic bias due to the bending.

Then, the tubular inner ring portion (4) has ribs (5) extending radially from the outer peripheral wall of the tubular inner ring portion (4), and outer ends (6 ) Is formed. Further, the outer ring portion (6) is formed so as to cut out an arc portion located in a fan-shaped portion enlarged from the opening portion of the inner ring portion (4). The arm portion (8) extends from the notched end portions (7) (7) of the outer ring portion (6) to the vicinity of the opening portion of the inner ring portion (4), and the arm portion (8)
A pressing piece (9) is formed at the tip of (8) parallel to the center line (Y) so as to cover the open part of the inner ring part (4). The inner surface of the pressing piece portion (9) is curved so as to follow the inner circumference of the inner ring portion (4). Further, the arm portion (8) forming the pressing piece portion (9) is supported in the central portion by auxiliary ribs (10) and (10) extending from both ends of the inner ring portion (4) which are notched, and the pressing piece portion (8) is formed. The tip forming (9) is a free end.

In such a rebar spacing retainer (1), for example, in the case of applying a heat insulating material to a wall, the heat insulating material provided inside the formwork and the rebar vertically installed at a predetermined interval (A ), The holder (1) is attached from the lateral direction, that is, the holder (1) is held from the cutout portion of the outer ring portion (6) to the reinforcing bar (A), and the holder (1) is attached. Move horizontally to the rebar (A) side. As a result, the tips of both arm portions (8) in contact with the reinforcing bar (A) expand and expand, and by further moving the holder (1), the reinforcing bar (A) is opened in the inner ring part (4). Part to the inner ring
Insert into (4). Upon fitting, the enlarged arms (8) return to the original state and the pressing pieces (9) cover the opening.
When this holder (1) is fitted with the reinforcing bar (A), the inner ring
The fin piece (2) formed in (4) is bent along the longitudinal direction of the reinforcing bar (A), and the thickness and elastic force of the bent fin piece (2),
Also, the holder (1) is strongly fitted to the reinforcing bar (A) by the pressing of the pressing piece (9). Since the holder (1) is designed to be strongly fitted to the reinforcing bar (A) by the bent fin piece (2), even if it is attached to the horizontal reinforcing bar (A), It will not fall off due to such reasons.

Further, the fin piece (2) may be formed at a portion other than the central portion of the cylindrical inner ring portion (4) or may be formed at two or more places. Further, the projecting length of the fin piece (2) toward the center line (Y) side may be freely changed in design.

(Effects of the Invention) As described above, according to the spacing member of the present invention, a cylindrical inner ring portion having an opening, an outer ring portion supported by ribs extending radially from the inner ring portion, and the outer ring. Cut out a part of the part,
A pair of arms extending from the both ends of the notch toward the vicinity of the opening of the inner ring portion, and the interval between the facing surfaces is gradually narrowed toward the inner ring portion, and a reinforcing bar pressing piece formed at the tip of the arm portion. In the space retainer for the reinforcing bars consisting of the parts, since a thin flexible fin piece having an appropriate height is integrally formed on the inner peripheral surface of the inner ring part facing the reinforcing bar pressing piece part, When the rebar is inserted into the inner ring portion through the through, the flexible fin piece provided on the inner peripheral surface of the inner ring portion is pressed by the outer peripheral surface of the reinforcing bar to bend, and the bending of the fin piece due to the bending By urging, the reinforcing bar can be pressed against the pressing piece at the tip of the arm,
The fins and the pressing pieces can reliably hold the reinforcing bar without causing rattling. Therefore, even if the reinforcing bar has a slight variation in the diameter due to an error in the processing accuracy, the spacing holder of the present invention can surely fit the reinforcing bar regardless of the diameter. Therefore, the space between the heat insulating material or the form and the reinforcing bar can be reliably maintained.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment according to the present invention, and FIG.
FIG. 3 is a cross-sectional view of the main part, and FIG. (1) …… Holder, (2) …… Fin strip, (4) …… Cylinder inner ring,
(5) …… rib, (6) …… outer ring part, (9) …… pressing part.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical inner ring portion (4) having a partly opened portion, an outer ring portion (6) supported through ribs (5) extending radially from the inner ring portion (4), and the outer ring portion (6). A part of 6) is cut out and extends from both ends of the cutout toward the vicinity of the opening of the inner ring part (4), and the interval between the facing surfaces is gradually narrowed toward the inner ring part (4). A reinforcing bar spacing holder comprising an arm (8) (8) and a reinforcing bar pressing piece (9) (9) formed at the tip of the arm (8) (8). (9) The inner ring part facing (9)
A space retainer for reinforcing bars, characterized in that a flexible fin piece (2) having a suitable height is integrally formed on the inner peripheral surface of (4).