JP3913199B2 - Formwork for producing wall spacers for rebar construction, and method for producing wall spacers for rebar construction - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold for producing a wall spacer for reinforcing bar construction, and a method for producing a wall spacer for reinforcing bar construction.
[0002]
[Prior art]
When constructing a reinforced concrete structure, it is necessary to assemble a reinforcing bar at a predetermined location in the mold after installing the mold, or install a mold after assembling a reinforcing bar at a predetermined location. A spacer is used to keep the distance (cover) between the inner surface and the reinforcing bar as designed. The inventor of the present inventor has proposed a new spacer that is used for such a reinforcing bar construction and is easy to attach and difficult to come off (see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Application No. 2003-124634
[Problems to be solved by the invention]
The above-mentioned spacer is greeted with popularity among rebar construction companies. The present invention proposes a mold and a method capable of easily removing a mold when producing the above-mentioned spacer and capable of producing a large amount of spacers at the same time.
[0005]
[Means for Solving the Problems]
A formwork for producing a wall spacer for reinforcing bar construction according to claim 1 of the present application comprises N formwork bodies and (N + 1) formwork side plates (where N ≧ 1), The mold body is shaped to have a semicircular or semi-circular cutout in a substantially upper half of a rectangular plate, and the mold side plate forms a rectangular plate that forms the mold body. Longitudinal fixture for fixing the mold body and the formwork side plates arranged on both sides of the mold body in the longitudinal direction, which are formed into rectangular plates having substantially the same dimensions. And a transverse fixture for fixing the mold body and the mold side plates disposed on both sides of the mold body in the transverse direction, wherein the transverse fixture has a reinforcing bar at a desired location. For positioning, the height of the mold body and It is selected so as to be higher than the vertical dimension of the formwork side plate, and a concave portion for inserting the reinforcing bar is provided on the upper surface thereof so as to temporarily fix the reinforcing bar when the wall spacer is manufactured. To do.
[0006]
A method for producing a wall spacer for reinforcing bar construction according to claim 2 of the present application includes the steps of preparing the formwork body and the formwork side plate according to claim 1, and the both sides of each of the formwork bodies. Placing each of the formwork side plates and fixing in the longitudinal direction using the longitudinal direction fixture according to claim 1 and in the transverse direction using the transverse direction fixture according to claim 1; The mortar or concrete is poured after placing the reinforcing bar in a predetermined part of the concave part of the mold body formed by the notch so as to be placed in the concave part for inserting the reinforcing bar, or by the notch After pouring mortar or concrete into the recess of the mold body to be formed, placing the reinforcing bar so as to be placed in the recess for inserting the reinforcing bar, and the mortar or concrete After bets it has been cured and is characterized in that it comprises a step of releasing the fixing.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, with reference to drawings, the formwork which concerns on preferable embodiment of this invention is demonstrated in detail. FIG. 1 is an exploded perspective view of a mold according to a preferred embodiment of the present invention. The formwork according to a preferred embodiment of the present invention, indicated as a whole by the reference numeral 10 in FIGS. 1 and 2, includes N formwork bodies 12 and (N + 1) formwork side plates 14. (N ≧ 1, FIG. 1 shows the case where N = 1).
[0008]
The formwork body 12 and the formwork side plate 14 may be made of wood or may be made of a synthetic resin material. However, from the viewpoint of effective use of resources and cost reduction, the formwork body 12 and the formwork side plate 14 may be formed using waste materials. preferable.
[0009]
The mold body 12 is shaped so as to have a semicircular notch 12a in a substantially upper half of a rectangular (vertical H × horizontal L) plate having a thickness D. On the other hand, the formwork side plate 14 is formed to be a rectangular plate (vertical H × horizontal L) having substantially the same dimensions as the rectangular plate forming the formwork body 12. The thickness D ₁ of the mold side plate 14 is usually selected to be smaller than the thickness D of the mold body 12.
[0010]
FIG. 2 is a perspective view showing a state in which the formwork side plates 14 are arranged on both sides of the formwork body 12. By arranging the mold body 12 and the mold side plate 14 as shown in FIG. 2, a semicircular disk-shaped recess is formed at the center of the mold 10, and a reinforcing bar is placed in the recess to form a mortar or By pouring the concrete, a semi-disc shaped wall spacer is formed.
[0011]
Next, a method for producing a wall spacer for reinforcing bar construction using the mold 10 configured as described above will be described. First, N mold body 12 and (N + 1) mold side plates 14 are prepared (see FIG. 3A). And the formwork side plate 14 is each arrange | positioned on both sides of each formwork main body 12 (refer FIG.3 (b)), and the formwork 10 is comprised. Next, the mold frame 10 is fixed in the length direction using the length direction fixture 16 for fixing the mold frame 10 in the length direction (X direction), and the mold frame 10 is crossed in the transverse direction (Y direction). The mold 10 is secured in the transverse direction using a transverse fixture 18 for securing in
[0012]
In addition, the length direction fixing tool 16 is brought into contact with the mold side plate located at the end most and pressed toward each other as indicated by an arrow A in FIG. It is comprised so that the formwork side plate 14 may become united. Alternatively, by contacting one of the mold end side plates located at the end in contact with the fixed wall (not shown) and pressing the other end of the end frame located at the end toward the one form plate side plate, The mold body 12 and the mold side plate 14 may be integrated.
[0013]
The height H ₁ of the transverse fixture 18 is selected to be higher than the longitudinal dimension H of the mold body 12 and the mold side plate 14 in order to position the reinforcing bar at a desired location (see FIG. 4). Further, a concave portion 18a for inserting a reinforcing bar is provided on the upper surface of the transverse fixture 18 so as to temporarily fix the reinforcing bar when the wall spacer is manufactured. The transverse fixture 18 thus configured is brought into contact with the mold 10 from the lateral direction and pressed toward each other as shown by an arrow B in FIG. And the formwork side plate 14 are integrated. Alternatively, one side in the horizontal direction of the mold 10 is brought into contact with a fixed wall (not shown), and the other side in the horizontal direction of the mold 10 is pressed against the one side to thereby form the mold body 12 and the mold. You may comprise so that the frame side board 14 may become united.
[0014]
Next, a reinforcing bar is inserted into the recess 18a of the transverse fixture 18 (see FIGS. 3D and 3E). Thereafter, concrete or mortar is poured into the recess 12a of the mold body 12 (FIG. 3 (f)). And after concrete or mortar hardens | cures, a wall spacer will be obtained (FIG.3 (h)) if the length direction fixing tool 16 and the horizontal direction fixing tool 18 are removed (FIG.3 (g)).
[0015]
Alternatively, instead of pouring concrete or mortar into the recess 12a after placing the reinforcing bars as in the embodiment, as shown in FIG. 5, the concrete or mortar is poured into the recess 12a before placing the reinforcing bars (FIG. 5). (Refer to (d)), and then the reinforcing bars may be arranged at predetermined locations (see FIG. 5 (e)).
[0016]
It should be noted that the mold can be easily removed by applying a release agent to the side surface of the mold side plate 14.
[0017]
The present invention is not limited to the embodiments of the invention described above, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.
[0018]
For example, in the mold shown in the above embodiment, a wall spacer having a semi-disc shape is formed. However, as shown in FIG. 6A, the notch 12a of the mold body 12 is formed in a semicircle. A wall spacer having a shape obtained by cutting a part of a semicircular disk is obtained by making a shape obtained by cutting a part of the plate (see FIG. 6B).
[0019]
【The invention's effect】
According to the present invention, since the component parts 12 and 14 of the mold 10 are made separately, the demolding operation is extremely easy, and a large amount of wall spacers can be produced simultaneously.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a mold according to a preferred embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which formwork side plates are arranged on both sides of the formwork body.
FIG. 3 is a series of diagrams showing a method for producing a wall spacer for reinforcing bars.
FIG. 4 is an enlarged perspective view showing a part of a method for producing a wall spacer for reinforcing bar construction.
FIG. 5 is a series of diagrams showing another method for producing a wall spacer for reinforcing bar construction.
6 (a) is an exploded perspective view showing a modified form of the mold, and FIG. 6 (b) is a perspective view of a wall spacer produced using the mold of FIG. 6 (a).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Formwork 12 Formwork body 14 Formwork side plate 16 Length direction fixing tool 18 Cross direction fixing tool

Claims (2)

A formwork for making a wall spacer for rebar construction,
N formwork bodies,
(N + 1) pieces of formwork side plates (where N ≧ 1),
The mold body is shaped to have a semicircular or semi-circular cutout in a substantially upper half of a rectangular plate, and the mold side plate forms a rectangular plate that forms the mold body. It is shaped to be a rectangular plate with almost the same dimensions as
A length direction fixture for fixing the mold body side plates and the mold side plates disposed on both sides of the mold body in the length direction;
A transverse direction fixture for fixing in a transverse direction the mold body and the mold side plates disposed on both sides of the mold body;
The transverse fixture is selected so that its height is higher than the vertical dimensions of the mold body and the mold side plate in order to position the reinforcing bar at a desired location, and the wall spacer is formed on the upper surface thereof. A formwork characterized in that a recess for inserting a reinforcing bar is provided to sometimes temporarily fix the reinforcing bar. A method for producing a wall spacer for rebar construction,
Preparing the formwork body and formwork side plate according to claim 1;
The said formwork side board is each arrange | positioned on each both sides of the said formwork main body, and it uses the said length direction fixing tool of the said length direction, and uses the length direction and the said transverse direction fixing tool of the said Claim 1. Fixing in the transverse direction using
Pour mortar or concrete after placing the rebar in a predetermined position of the recess of the mold body formed by the notch so that it is placed in the recess for inserting the rebar,
Alternatively, after pouring mortar or concrete into the recess of the mold body formed by the notch, placing the reinforcing bar so as to be placed in the recess for inserting the reinforcing bar,
Releasing the fixation after the mortar or concrete is cured;
A method comprising the steps of:

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