JP2008156915A - Void retaining spacer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a void retaining spacer which can easily set a void over a reinforcement at a predetermined location, and exerts both functions of a void retainer and a spacer. <P>SOLUTION: The void retaining spacer 11 is for use in forming a void slab, and mounted on an intersecting location between an upper reinforcement 26 and a lower reinforcement 25 intersecting in a slab form, to retain an interval between the reinforcements and the slab form to a constant value, and to pierce the void to retain the same. The void retaining spacer 11 is formed of a circular base 12, a projection 13 erecting from the center of the base 12 by a predetermined length and having a tapered point 18, a pair of lower reinforcement engaging portions 14, 14 arranged on a lower side of the base 12, for engaging with the lower reinforcement 25, and a pair of leg portions 15, 15 arranged under the lower reinforcement engaging portions 14, 14, respectively. Further the spacer has an insertion space 27 secured under the base 12, into which the upper reinforcement 26 is inserted. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a void holding spacer, and more specifically, when forming a void slab, it is attached to a crossing position of reinforcing bars arranged vertically and horizontally in a slab mold frame, and the interval between the reinforcing bar and the slab mold frame is determined. The present invention relates to a void holding spacer that functions as a spacer that keeps the surface constant and pierces and holds a void made of polystyrene foam.

  Conventionally, a method of constructing a void slab by installing a plurality of block-shaped voids made of polystyrene foam at a predetermined position on a reinforcing bar arranged in a slab formwork, and placing concrete in the slab formwork. It has been broken.

In this case, a void having the following configuration for holding the void at a predetermined position on the reinforcing bar is known. The void is provided with a plurality of mounting holes penetrating in the vertical direction. Then, after inserting the void mounting hole into the mounting rod provided in advance in the slab formwork, the tightening nut is screwed into the bolt provided at the upper end of the mounting rod, so that the void is reinforced. It fixes to the predetermined position above (refer patent document 1).
JP 2001-3506 A

  In the case of this conventional example, since parts such as a mounting rod and a tightening nut are required, there is a disadvantage that the product cost increases. Moreover, the operation | work of attaching a mounting rod to a slab formwork, or fastening a volt | bolt with a fastening nut is complicated, and also has the problem that workability | operativity is bad.

  Moreover, the position where a void can be installed has the fault that it is limited to the position where the attachment rod is provided.

  Therefore, in the case of the conventional example, it is solved that the increase in product cost is suppressed, the workability when the void is installed on the reinforcing bar, and the freedom of the position where the void can be installed is improved. Has a problem that must be.

  As a specific means for solving the problems of the conventional example, when forming the void slab, the present invention attaches the reinforcing bar to the crossing position of the upper reinforcing bar and the lower reinforcing bar arranged in a crossing manner in the slab formwork. A void retaining spacer that maintains a constant distance from the slab formwork and that pierces and retains a void, the void retaining spacer having a circular base and a required length from the central position of the base. A pair of lower reinforcing bar engaging portions, which are provided at the lower side of the base, and are provided at a lower end of the base, and a pair of lower reinforcing bars engaging with the lower reinforcing bar, and a pair of lower reinforcing bar engaging portions. The void holding spacer is characterized in that it includes a leg portion, and has an insertion space through which the upper rebar is inserted at a lower portion of the base portion.

Having a pair of upper rebar locking portions for locking the upper rebar on both sides of the insertion space;
The pair of lower reinforcing bar locking portions or the pair of upper reinforcing bar locking portions are formed in a C shape and provided with reinforcing bar insertion openings in opposing directions;
The protrusion is formed with a plurality of ridges;
Is included.

When forming a void slab, the void holding spacer according to the present invention is attached to the crossing position of the upper reinforcing bar and the lower reinforcing bar arranged in a crossing manner in the slab mold, and the reinforcing bar and the slab mold are connected to each other. A void holding spacer that maintains a constant spacing and pierces and holds a void. The void holding spacer has a circular base portion and a tip portion that stands up to a required length from the center position of the base portion. A tapered protrusion, a pair of lower rebar locking portions provided on the lower side of the base and locking the lower rebar, and a pair of legs provided at the lower portion of the lower rebar locking portion. The lower portion of the base has an insertion space through which the upper rebar is inserted, so that the lower rebar engaging portion is engaged with the lower rebar and the void holding spacer is set, and then the styrene foam void protrudes. Hit the part By prick, the void can be easily placed at a predetermined position on the reinforcing bar. Therefore, workability is good and the degree of freedom of the position where the void can be installed is high.
In addition, since the void holding spacer functions as both the void holding tool and the spacer, there are various excellent effects that the number of parts used can be reduced and the cost can be reduced.

  Further, by providing a pair of upper reinforcing bar locking portions for locking the upper reinforcing bars on both sides of the insertion space, not only the lower reinforcing bars but also the upper reinforcing bars are locked. That is, since the upper and lower reinforcing bars are locked by the four reinforcing bar locking portions, there is an excellent effect that the reinforcing bars can be securely held without the void holding spacer being rattled.

  The pair of lower reinforcing bar locking portions or the pair of upper reinforcing bar locking portions are formed in a C shape and are provided with reinforcing bar insertion openings in opposite directions, thereby lengthening the reinforcing bars. Since it hold | maintains in the state hold | maintained from both the side parts along a direction, there exists the outstanding effect that a void holding spacer can hold | maintain a reinforcing bar stably, without rattling.

  Furthermore, since the protruding portion is formed with a plurality of ridges, the void pierced into the protruding portion has an excellent effect of being held in a stable state without rotating or rattling.

  Next, embodiments of the present invention will be described with reference to the drawings. First, in FIG. 1 to FIG. 7, reference numeral 11 denotes a void holding spacer. The void holding spacer 11 is integrally formed of a synthetic resin material such as plastic, and has a circular or cylindrical base 12. The projecting portion 13 having a required length erected from the center position of the base portion 12, a pair of lower reinforcing bar locking portions 14, 14 provided on the lower side of the base portion 12, and the lower reinforcing bar locking portions 14, 14 It is comprised from a pair of leg parts 15 and 15 provided in the lower part.

  The base 12 has a required height and is formed in a circular shape or a cylindrical shape. And as shown in FIG. 7, the opening part 16 and the edge part 16a are provided in the lower part, and the inside is formed in the cavity.

  The protruding portion 13 is provided in a state of standing from the center position of the base portion 12. The projecting portion 13 is composed of four ridges 17 and has a cross section formed in a cross shape (see FIG. 4), and is formed with an acute angle and a taper along the tip portion 18. Thus, by having the four ridges 17, the void pierced into the protruding portion 13 is held in a stable state without rotating or rattling.

  A pair of L-shaped connecting pieces 19 are provided at the lower portion of the base portion 12 at opposite positions, and lower reinforcing bar locking portions 14 and 14 are provided at the lower ends of the connecting pieces 19 and 19, respectively.

  The lower reinforcing bar locking portion 14 has an upper end portion 20 and a lower end portion 21, which are integrally formed via a connection wall 22. Further, the connection wall 22 has a step portion 23, and the upper end portion 20 and the lower end portion 21 are provided at a position having a step. The upper end portion 20 has an upper arc-shaped portion 20a, the lower end portion 21 has a lower arc-shaped portion 21a, a rebar insertion port 24 is provided on the side portion, and the lower rebar locking portion 14 is C-shaped. It is formed in a shape.

  As shown in FIG. 1, the pair of lower reinforcing bar locking portions 14, 14 are positioned at a predetermined interval, and a reinforcing bar insertion port 24 is provided in a direction facing each other. Therefore, as shown in FIG. 2, since the lower reinforcing bar 25 is held in a state of being held from both sides along the length direction, the lower reinforcing bar 25 can be stably held without the void holding spacer 11 being rattled. .

  As shown in FIG. 2, an insertion space 27 into which the upper rebar 26 can be inserted is provided at a lower portion of the base portion 12, that is, between both connection pieces 19 and 19.

  The leg portion 15 has a predetermined length and is provided at the lower portion of the lower reinforcing bar locking portion 14. Further, the leg portion 15 is formed with a plurality of groove portions 28 along the length direction.

  Next, FIGS. 9 to 15 show a void holding spacer 29 according to the second embodiment. In the second embodiment, the same parts as those of the void holding spacer 11 of the first embodiment are denoted by the same reference numerals and their details are omitted.

  The void holding spacer 29 is provided with a pair of upper reinforcing bar locking portions 30, 30 on both sides of the insertion space 27. The upper reinforcing bar locking portion 30 is formed in a shape that can lock the upper reinforcing bar 26.

  The upper reinforcing bar locking portion 30 has an upper end portion 31 and a lower end portion 32, which are integrally formed via a connection wall 33. The upper end portions 31 and 31 are respectively provided at opposed positions on the lower portion of the base portion 12. Further, the connection wall 33 has a stepped portion 34, and the upper end portion 31 and the lower end portion 32 are provided at a position having a step. The upper end portion 31 has an upper arc-shaped portion 31a, the lower end portion 32 has a lower arc-shaped portion 32a, a rebar insertion port 35 is provided on a side portion, and the upper rebar locking portion 30 is C-shaped. It is formed in a shape.

  As shown in FIG. 9, the pair of upper reinforcing bar locking portions 30, 30 are positioned at a predetermined interval, and a reinforcing bar insertion port 35 is provided in a direction facing each other. Accordingly, as shown in FIG. 10, since the upper rebar 26 is held in a state of being held from both sides along the length direction, the upper rebar 26 can be stably held without the void holding spacer 29 being rattled. .

  Since the void holding spacer 29 having such a configuration locks the lower reinforcing bar 25 and the upper reinforcing bar 26 with the four reinforcing bar locking portions 14, 14, 30, and 30, the void holding spacer 29 is not loose. In addition, the lower reinforcing bar 25 and the upper reinforcing bar 26 can be securely held.

  Next, a method of using the void holding spacers 11 and 29 having the above configuration will be described. First, as shown in FIG. 8 and FIG. 16, an upper bar 37 and a lower bar 38 are arranged in the slab form 36, and the lower bar 38 has an upper bar 26 and a lower bar 25. Are arranged in a crossing manner.

  When the void holding spacer 11 is used, the reinforcing bar insertion portions 24, 24 of the lower reinforcing bar locking parts 14, 14 are respectively addressed to both sides of the lower reinforcing bar 25, and then both of the lower reinforcing bar locking parts. 14 and 14 are attached together in a state where they are pressed together in the addressing direction and clicked (see FIG. 2).

When the void holding spacer 29 is used, the reinforcing bar insertion portions 24, 24 of the lower reinforcing bar locking portions 14, 14 are directed to both sides of the lower reinforcing bar 25, and at the same time, the upper reinforcing bar locking portion 30, 30 rebar insertion openings 35, 35 are directed to both sides of the lower rebar 26, and then both lower rebar engaging portions 14, 14 and both upper rebar engaging portions 30, 30 are joined together. Then, press it in the direction of attachment and click it in place (see FIG. 10).
In this case, as described above, the upper and lower reinforcing bars 25 and 26 are locked by the four reinforcing bar locking portions 14, 14, 30, and 30. It can be held securely.

  In this way, when the void retaining spacer 11 or 29 is set and then the styrene foam void 39 is pierced into the protruding portion 13, the void 39 can be easily installed at a predetermined position on the reinforcing bar (see FIG. 8 and FIG. 8). (See FIG. 16). Therefore, the workability is extremely good and the degree of freedom of the position where the void can be installed is high. Further, since the void holding spacers 11 and 29 have both functions of the void holder and the spacer, the number of parts to be used can be reduced and the cost can be reduced.

1 is a perspective view of a void holding spacer 11 according to a first embodiment of the present invention. It is a perspective view of the state which attached the spacer 11 for void holding | maintenance which concerns on 1st Example of this invention in the crossing position of a reinforcing bar. It is a front view of the spacer 11 for void holding | maintenance which concerns on 1st Example of this invention. It is a top view of the spacer 11 for void holding | maintenance which concerns on 1st Example of this invention. It is a bottom view of the void holding spacer 11 according to the first embodiment of the present invention. It is a right view of the spacer 11 for void holding | maintenance which concerns on 1st Example of this invention. It is a front view vertical center sectional view of the void holding spacer 11 according to the first embodiment of the present invention. It is a longitudinal cross-sectional view of a slab form in a state where a void 39 is pierced and held in the protruding portion 13 of the void holding spacer 11. It is a perspective view of the void holding spacer 29 according to the second embodiment of the present invention. It is a perspective view of the state which attached the spacer 29 for void holding | maintenance which concerns on 2nd Example of this invention in the crossing position of a reinforcing bar. It is a front view of the void holding spacer 29 according to the second embodiment of the present invention. It is a top view of the spacer 29 for void holding | maintenance which concerns on 2nd Example of this invention. It is a bottom view of the void holding spacer 29 according to the second embodiment of the present invention. It is a right view of the void holding spacer 29 according to the second embodiment of the present invention. It is a front view vertical center sectional view of the void holding spacer 29 according to the second embodiment of the present invention. It is a longitudinal cross-sectional view of a slab form in a state where a void 39 is pierced and held in the protruding portion 13 of the void holding spacer 29.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Void holding spacer 12 Base part 13 Protruding part 14 Lower reinforcing bar latching part 15 Leg part 16 Opening part 16a Edge 17 Projection 18 Tip part 19 Connection piece 20 Upper end part 20a Upper arcuate part 21 Lower end part 21a Lower arcuate part 22 Connection Wall 23 Stepped portion 24 Reinforcing bar insertion port 25 Lower reinforcing bar 26 Upper reinforcing bar 27 Insertion space 28 Groove portion 29 Void holding spacer 30 Upper reinforcing bar locking portion 31 Upper end portion 31a Upper arc portion 32 Lower end portion 32a Lower arc portion 33 Connection wall 34 Step portion 35 Reinforcing bar insertion slot 36 Slab form 37 Upper bar 38 Lower bar 39 Void

Claims (4)

When forming the void slab, it is attached to the crossing position of the upper and lower reinforcing bars arranged in a crossing manner in the slab form, and the gap between the rebar and the slab form is kept constant. A void holding spacer that is pierced and held,
The void holding spacer
A circular base, and
A projecting portion with a tip end tapered from a central position of the base portion with a required length,
A pair of lower reinforcing bar locking portions provided on the lower side of the base and locking the lower reinforcing bars;
A pair of legs provided at the lower part of the lower reinforcing bar locking part,
A void holding spacer, characterized in that a lower portion of the base portion has an insertion space through which the upper rebar is inserted.   2. The void holding spacer according to claim 1, further comprising a pair of upper reinforcing bar locking portions that lock the upper reinforcing bar on both sides of the insertion space.   The pair of lower reinforcing bar engaging portions or the pair of upper reinforcing bar engaging portions are formed in a C shape, and a reinforcing bar insertion opening is provided in each facing direction. 2. A void holding spacer according to 2.   The void holding spacer according to claim 1, wherein the protrusion is formed with a plurality of protrusions.

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