JP4681862B2 - Spacer installation method - Google Patents

Description

The present invention relates to method of installing spacers.

A slab spacer disclosed in Japanese Patent Application Laid-Open No. 2004-124653 has been proposed in order to prevent the lightweight embedding material from being lifted when the concrete is placed in the construction of the hollow slab. This restrains the upper slab of the slab with a slab spacer to prevent the lightweight embedding material from being lifted when the concrete is placed.
JP 2004-124653 A

  However, the slab spacer as described above is installed by the installer of the lightweight embedding material before placing the rebar into the slab formwork of the rebar, so there is a problem that efficient work becomes impossible due to double labor was there.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a spacer that can be installed by a installer of a light-weight embedding material after placement of a reinforcing bar into a slab formwork, and an installation method thereof. That is.

The spacer is installed in such a manner that a support shaft is provided at an eccentric position of the lower-end bar placement portion for mounting the lower-end bar of the slab, and an anchor that is inserted into the insertion hole of the slab mold is attached to the lower side of the support shaft. After forming the spacer with the upper-end bar mounting part attached to the upper side of the support shaft with the support member, after arranging the lower end of the slab in the slab formwork, insert the insertion hole in the bottom plate near the lower end of the slab After opening and fitting the anchor in the lower end muscle placing portion into the insertion hole, the lower end muscle placing portion is rotated around the anchor and inserted below the lower end muscle of the slab.

In addition, the spacer is installed by forming a spacer in which a support shaft is provided at an eccentric position of the lower bar placing portion on which the slab lower bar is placed, and the upper bar placing portion is attached to the upper side of the support shaft by a support member. The lower end of the spacer is placed at the corner of the intersection of the lower slab of the slab arranged in the slab mold , and the gap formed between the bottom plate by lifting the intersection of the lower slab of the slab The lower end muscle placing portion is inserted by rotating around the support shaft of the lower end muscle placing portion, and the weight of the slab lower end muscle placed on the placing piece in the lower end muscle placing portion is It is fixing a lower end stripe mounting part to the slab formwork .
The lower end streak placement portion is formed by providing support legs on a placement piece extending in a plurality of directions from the support shaft, and further, a support member having an opening on the upper surface only on the support shaft of the lower end streak placement portion. This includes that the fixing hole is provided.

  A support shaft is provided at an eccentric position of the lower end muscle placement portion for placing the slab lower end reinforcement, and an anchor fitted into an insertion hole opened in the slab mold is attached to the lower side of the support shaft. Thus, since the lower end bar placement portion can rotate around the anchor, the insertion hole can be opened in the bottom plate of the slab formwork even after the lower end bar of the slab is arranged. Further, after arranging the slab lower end bar in the slab formwork, the insertion hole is opened, and the anchor is inserted into the insertion hole, so that the installer of the lightweight embedding material can install the spacer. Moreover, since the lower end muscle placement portion is fixed by the slab lower end reinforcement, the upper end reinforcement placement portion can be stably installed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a spacer and an installation method thereof according to the present invention will be described with reference to the drawings. First, the spacer will be described, and then this installation method will be described. In each embodiment, the same components are described with the same reference numerals, and only different components are described with different reference numerals.

  FIG. 1 shows a spacer 1 according to the first embodiment, and the spacer 1 is composed of a lower-end streak placing portion 2 and an upper-end streak placing portion 3.

  The lower end streak placing portion 2 is provided with a supporting leg 7 on a placing piece 6 extending in two directions perpendicular to the support shaft 5, and these supporting legs 7 are connected by a curved connecting piece 8 to form a flat fan shape. The support shaft 5 is formed at the center of the fan, that is, at the eccentric position of the lower streak placing portion 2. The support shaft 5 is a cap nut having a female screw portion 9 provided on the inner side thereof. The anchor 4 is attached to the lower side of the support shaft 5, and the upper end muscle placement portion 3 is attached to the upper side of the support shaft 5 with a column member 15.

  The anchor 4 is composed of a connection bolt 10 on the upper surface of the disk 11 and an insertion pin 12 on the lower surface of the disk 11. The insertion pin 12 has two latching pieces 13 opened outward from the lower side to the upper side. It is provided and this latching piece 13 can be closed inside.

  On the other hand, the upper streak placing portion 3 includes a support member 15 screwed into the support shaft 5 by a lower male screw portion 14 and a placement piece 16 provided at the upper end portion of the support member 15. . Therefore, the upper end streak placing portion 3 can be freely detached from the support shaft 5.

  In addition, the lower end streak placing portion 2 can be formed into an isosceles triangle shape (not shown) by connecting two support legs 7 with a linear connecting piece, and a support shaft 5 is provided at a right angle portion of the triangle. Provided.

  FIG. 2 shows the spacer 18 of the second embodiment. This spacer 18 is obtained by removing the anchor 4 from the spacer 1 of the first embodiment, and providing the support shaft 5 of the lower-end streak placing portion 2 with a support member fixing hole 17 opened only on the upper surface. Has the same configuration as the spacer 1 of the first embodiment.

  FIG. 3 shows a spacer 19 according to the third embodiment. This spacer 19 is provided with a support leg 7 (a support leg 7 is not connected by a connecting piece 8) on a mounting piece 6 in which the lower end stripe mounting portion 2 extends from the support shaft 5 in a plurality of directions, for example, four directions. Other than this, the configuration is the same as that of the spacer 18 of the second embodiment.

  Next, the installation method of said spacer is demonstrated. First, a method of installing the spacer 1 according to the first embodiment will be described. This spacer 1 is installed after arranging the slab lower end bar on the bottom plate of the slab form for constructing the hollow slab.

  First, the top streak placing portion 3 is removed from the support shaft 5 of the spacer 1. Next, the slab lower bar 20 comprising the vertical bars 21a and the horizontal bars 21b is arranged in the slab formwork 23. And as shown to (1) of FIG. 4, the insertion hole 25 is opened to the baseplate 24 of the crossing part 22 vicinity of the vertical line 21a and the horizontal line 21b. Next, as shown in (2) of the figure, the anchor 4 is inserted into the insertion hole 25, and the lower end placing portion 2 is installed at the corner portion 26 of the intersecting portion 22.

  As shown in FIG. 5, the installation method is such that when the insertion pin 12 is inserted into the insertion hole 25, the latching piece 13 closes inward, and when the latching piece 13 passes through the insertion hole 25, it returns to its original state. While being brought into contact with the lower surface of the bottom plate 24, the disk 11 is fitted in the insertion hole 25. Since the anchor 4 is fixed to the insertion hole 25 in this way, the upper end muscle placing portion 2 can be rotated around the anchor 4 as an axis.

Next, as shown in FIG. 6 (1), the lower end streak placing portion 2 is rotated and inserted into the gap portion between the bottom plate 24 by slightly lifting the intersecting portion 22, that is, below the intersecting portion 22. Then, as shown in (2) of the figure, the vertical stripes 21a and the horizontal stripes 21b are placed on the placement piece 6. Then, such insertion of the lower end streak placement portion 2 is performed at an appropriate location of the slab mold 23.
The upper streak placing portion 3 is removed from the support shaft 5 of the spacer 1.

  Next, as shown in FIG. 7, the column member 15 is screwed onto the upper side of the support shaft 5 of the lower end muscle placement portion 2 to attach the upper end placement portion 3, and the slab upper end stripe 27 is arranged on the placement piece 16. Straight and bind with binding wire 28. Therefore, the slab upper bar 27 bound to the spacer 1 can prevent the lightweight embedding material (not shown) installed between the slab lower bar 20 and the concrete from being lifted when placing concrete.

  In this embodiment, the upper end muscle placement portion 3 is removed from the support shaft 5 and the anchor 4 is inserted into the insertion hole 25. However, the anchor 4 is attached to the support shaft 5 while the upper end reinforcement placement portion 3 is attached. It can also be inserted into the insertion hole 25.

  Next, a method for installing the spacer 18 according to the second embodiment will be described. This method does not open the insertion hole 25 in the bottom plate 24, but presses the lower end stripe placement portion with the lower end stripe of the slab. It is what you do.

  First, as shown in (1) of FIG. 8, the spacer 18 having the upper end placement portion 3 attached to the support shaft 5 is installed at the corner 26 at the intersection 22 of the slab lower end reinforcement 20.

  Next, when the intersecting portion 22 is lifted up slightly and inserted into the gap between the bottom plate 24, that is, the lower end streak placement portion 2 is rotated about the support shaft 5 and inserted below the intersecting portion 22. As shown in (2) of the figure, the vertical stripes 20 and the horizontal stripes 21 are placed on the placement piece 6, and the lower end stripe placement portion 2 is fixed by this weight. That is, the spacer 18 is fixed by pressing the lower bar placing portion 2 with the lower slab bar 20. Then, such insertion of the lower end streak placement portion 2 is performed at an appropriate location of the slab mold 23.

  Further, as shown in FIG. 9, the slab upper end muscle 27 is arranged on the placement piece 16 of the upper end muscle placement portion 3 and is bound by the binding wire 28. Therefore, the plurality of spare spacers 18 are connected by the slab upper end bars 27 bound to the spacers 18 and can be stabilized as a whole slab.

  In addition, the method of installing the spacer 19 of the third embodiment is also performed by the same method as the method of installing the spacer 18 of the second embodiment.

It is the spacer of 1st Embodiment, (1) is sectional drawing, (2) is AA sectional drawing of (1). It is the spacer of 2nd Embodiment, (1) is sectional drawing, (2) is BB sectional drawing of (1). It is the spacer of 3rd Embodiment, (1) is sectional drawing, (2) is CC sectional drawing of (1). The installation method of the spacer of 1st Embodiment is shown, (1) is the top view which opened the insertion hole in the bottom plate, (2) is the top view which installed the spacer. The anchor is inserted into the insertion hole. (1) is a cross-sectional view in which the anchor is inserted into the insertion hole, (2) is a cross-sectional view in which the lower end streak placement portion is fixed, and (3) is D in (2). FIG. (1) is a plan view in which the bottom bar placement portion is rotated and inserted below the reinforcing bar, and (2) is a cross-sectional view of the same. It is sectional drawing which installed the upper end reinforcement mounting part in the lower end reinforcement mounting part. The installation method of the spacer of 2nd Embodiment is shown, (1) is the top view which installed the lower end reinforcement mounting part, (2) is the plane which rotated the lower end reinforcement mounting part and was inserted below the reinforcing bar FIG. It is sectional drawing inserted in the lower side of a reinforcing bar by rotating a lower end reinforcement mounting part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 18, 19 Spacer 2 Lower-end stripe mounting part 3 Upper-end bar placement part 4 Anchor 5 Support shaft 6, 16 Mounting piece 7 Support leg 8 Connecting piece 9 Female thread part 10 Connection bolt 11 Disc 12 Insertion pin 13 Hanging Stopping piece 14 Male thread 15 Post member
Reference Signs List 17 Fixing hole 20 Slab bottom bar 21a Longitudinal bar 21b Horizontal bar 22 Crossing part 23 Slab formwork 24 Bottom plate 25 Insert hole 26 Corner part 27 Slab top bar 28 Binding line

Claims (4)

A support shaft is provided at an eccentric position of the lower end muscle placement portion for placing the slab lower end reinforcement, and an anchor fitted into the insertion hole of the slab form frame is attached to the lower side of the support shaft, and above the support shaft. After forming the spacer where the upper streak placement part is attached with the strut member,
After placing the slab bottom bar in the slab formwork,
Open an insertion hole in the bottom plate near the bottom slab of the slab,
After inserting the anchor in the lower end muscle placement portion into the insertion hole,
Rotating the lower end muscle placement portion around the anchor and inserting it below the slab lower end muscle,
The installation method of the spacer characterized by this. A support shaft is provided at an eccentric position of the lower end muscle placement portion for placing the slab lower end reinforcement, and a spacer is formed on the upper side of the support shaft with the upper end placement portion attached by a support member.
The lower end streak placement portion of the spacer is installed at the corner of the intersection of the slab lower end reinforcements arranged in the slab formwork,
The lower end muscle placement part is rotated around the support shaft of the lower end muscle placement part and inserted into the gap part between the bottom plate by lifting the intersection of the lower end muscles of the slab,
Fixing the lower end muscle placement portion to the slab formwork by the weight of the slab lower end reinforcement placed on the placement piece in the lower end reinforcement placement portion;
The installation method of the spacer characterized by this. The lower end muscle placement portion is provided with a support leg on a placement piece extending in a plurality of directions from the support shaft,
The spacer installation method according to claim 2. The support shaft of the lower end muscle placement portion was provided with a fixing hole for a column member that opened only on the upper surface,
The spacer installation method according to claim 2 or 3, wherein

Images