JP3232252U - Reinforcing bar spacing holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interval holder for reinforcing bars capable of maintaining a predetermined interval between an inner surface surface of a formwork and a foundation reinforcing bar without affecting the strength of the foundation concrete. SOLUTION: A reinforcing bar spacing holder 1 is used for holding a spacing between an inner surface of a formwork K and a foundation reinforcing bar T when constructing foundation concrete with a formwork K. The formwork engaging portion 10 that can be engaged from above on the formwork K is provided at a predetermined distance W0 in the horizontal direction and at a low position in the vertical direction from the formwork engaging portion 10. The reinforcing bar T includes a horizontal reinforcing bar engaging portion 20 that can be engaged with the uppermost horizontal reinforcing bar TX from above, and a connecting portion 30 that connects the formwork engaging portion 10 and the horizontal reinforcing bar engaging portion 20. [Selection diagram] FIG. 7

Description

The present invention relates to a reinforcing bar spacing holder used for maintaining a spacing between the inner surface of the formwork and the foundation reinforcing bar during the construction of foundation concrete.

Conventionally, when constructing foundation concrete using a formwork, it is resin-molded into a donut shape in order to maintain a predetermined distance (called "cover") between the inner surface of the formwork and the foundation reinforcing bar. An instrument called a reinforcing bar spacer is widely used (see, for example, Patent Document 1 and the like).

The above-mentioned conventional reinforcing bar spacer is attached to a key point of the foundation reinforcing bar, and the outer peripheral frame abuts on the inner surface surface of the formwork to maintain a predetermined distance between the inner surface surface of the formwork and the foundation reinforcing bar. It is something that can be done.

Japanese Unexamined Patent Publication No. 10-238018

However, in the conventional reinforcing bar spacer described above, ready-mixed concrete is cast in a state of being attached to the foundation reinforcing bar and buried as a foreign substance in the foundation concrete as it is. Therefore, there is a problem that the strength of the foundation concrete may be affected when the buried state is not normal, for example, a part of the reinforcing bar spacer protrudes from the foundation concrete.

An object of the present invention is to provide a reinforcing bar spacing holder capable of maintaining a predetermined spacing between an inner surface of a formwork and a foundation reinforcing bar without affecting the strength of the foundation concrete.

(1) The reinforcing bar spacing holder according to the present invention is a reinforcing bar spacing holder used for maintaining a gap between the inner surface of the formwork and the foundation reinforcing bar when constructing foundation concrete with a formwork. A formwork engaging portion that can be engaged with the upper end of the formwork from above, and a formwork engaging portion that is provided at a predetermined distance from the formwork engaging portion and at a lower position in the vertical direction, and is provided at a lower position in the vertical direction. It is provided with a horizontal reinforcing bar engaging portion that can be engaged with the horizontal reinforcing bar from above, and a connecting portion that connects the formwork engaging portion and the horizontal reinforcing bar engaging portion.

According to this configuration, the formwork engaging portion of the reinforcing bar spacing holder is engaged with the upper end of the formwork from above, and the horizontal reinforcing bar engaging portion connected to the formwork engaging portion via the connecting portion is formed. By engaging with the uppermost horizontal reinforcing bar of the foundation reinforcing bar from above at a predetermined distance in the horizontal direction and at a low position in the vertical direction from the formwork engaging portion, a predetermined distance is formed between the inner surface of the formwork and the foundation reinforcing bar. The interval can be maintained. Then, when the base portion of the foundation concrete and the cloth foundation portion are formed by double striking, the base portion is maintained in a state where a predetermined distance is maintained between the inner surface of the outer formwork and the foundation reinforcing bar by the reinforcing bar spacing holder. After placing the ready-mixed concrete for solidification, remove the space holder for the reinforcing bar, install the inner formwork, and cast and solidify the ready-mixed concrete for the cloth foundation to form the foundation reinforcing bar. It is possible to form a foundation concrete with a predetermined interval (cover) between the two. Therefore, it is possible to provide an interval holder for reinforcing bars that can maintain a predetermined interval between the inner surface of the formwork and the foundation reinforcing bar without affecting the strength of the foundation concrete.

(2) The formwork engaging portion is formed in a downward U-shape that opens with a width corresponding to the thickness of the formwork, and the horizontal reinforcing bar engaging portion has a width corresponding to the thickness of the horizontal reinforcing bar. It is formed in a downward U-shape that opens, and the connection portion is formed in an L-shape, and the formwork engaging portion is continuously provided at the end on the L-shaped vertical side side, and the L-shaped horizontal side side. The horizontal reinforcing bar engaging portion is continuously provided at the end portion.

According to this configuration, the formwork engaging portion formed continuously at the end on the L-shaped vertical side side of the connecting portion and formed in a downward U-shape opens with a width corresponding to the thickness of the formwork. Therefore, it can be securely engaged with the upper end of the formwork from above. On the other hand, the horizontal reinforcing bar engaging portion, which is continuously provided at the end on the L-shaped lateral side side of the connecting portion and is formed in a downward U-shape, is lowered by the height of the connecting portion from the formwork engaging portion. Since the opening is wide enough to correspond to the thickness of the horizontal rebar at the vertical position, it is possible to securely engage the uppermost horizontal rebar of the foundation rebar from above at a position separated from the inner surface of the formwork by a predetermined distance. it can. Therefore, a predetermined distance can be reliably maintained between the inner surface of the formwork and the foundation reinforcing bar.

(3) The downward U-shape of the horizontal reinforcing bar engaging portion comprises a first vertical side, a horizontal side, and a second vertical side provided in order from the side far from the connecting portion, and the downward U-shaped portion of the mold engaging portion. The U-shape, the L-shape of the connecting portion, the first vertical side and the horizontal side of the horizontal reinforcing bar engaging portion are integrally formed by bending one rectangular metal plate, and the horizontal reinforcing bar is formed integrally. The second vertical side of the engaging portion is formed by fixing and integrating a metal piece separate from the rectangular metal plate.

According to this configuration, the entire reinforcing bar spacing holder except for the second vertical side of the horizontal reinforcing bar engaging portion is integrally formed by bending one rectangular metal plate, and the second vertical side of the horizontal reinforcing bar engaging portion is formed integrally. Is formed by fixing a separate metal piece and integrating it, so that the structure with a downward U-shape at the formwork engaging part and the horizontal reinforcing bar engaging part can be secured by simple processing. It can be realized.

(4) The second vertical side is arranged in a posture of hanging from the lower surface of the end near the connecting portion of the horizontal side, and a reinforcing piece connecting the side surface of the second vertical side and the lower surface of the L-shaped horizontal side. It is fixed via.

According to this configuration, the side surface of the second vertical side made of a separate metal plate is connected to the lower surface of the L-shaped horizontal side via a reinforcing piece, so that the lower surface of the end portion near the connection portion of the horizontal side is connected. By being firmly fixed in a hanging posture, a downward U-shape of the horizontal reinforcing bar engaging portion is formed.

(5) The reinforcing piece is made of a metal plate having a right-angled triangular shape when viewed from the side, and the hypotenuse is arranged downward, and the horizontal upper side of the two sides sandwiching the right angle is joined to the lower surface of the L-shaped horizontal side and is vertical. Vertical side is joined to the side surface of the second vertical side.

According to this configuration, the second vertical side is formed by joining the horizontal upper side of the reinforcing piece to the lower surface of the L-shaped horizontal side and the vertical vertical side to the side surface of the second vertical side. It is firmly fixed in a posture of hanging from the lower surface of the end near the connection part.

(6) The second vertical side is made of an upside-down L-shaped metal plate, is arranged in a posture of hanging from the lower surface of the end portion near the connection portion of the horizontal side, and is fixed by screwing.

According to this configuration, the second vertical side made of a separate metal plate is firmly fixed by screwing in a posture of hanging from the lower surface of the end near the connection part of the horizontal side, so that the horizontal reinforcing bar engaging portion is formed. A downward U-shape is formed.

(7) The downward U-shape of the formwork engaging portion, the L-shape of the connection portion, and the downward U-shape of the horizontal reinforcing bar engaging portion are integrally formed by bending one rectangular metal plate. Is.

According to this configuration, since the entire reinforcing bar spacing holder is integrally formed by bending one rectangular metal plate, the formwork engaging portion and the horizontal reinforcing bar engaging portion each have a downward U-shape. The structure can be realized with a small number of parts.

It is a perspective view which shows the space holder for a reinforcing bar which concerns on embodiment of this invention. It is a front view which shows the space holder for a reinforcing bar which concerns on embodiment. It is a rear view which shows the space holder for a reinforcing bar which concerns on embodiment. It is a right side view which shows the space holder for a reinforcing bar which concerns on embodiment. It is a top view which shows the space holder for a reinforcing bar which concerns on embodiment. It is a bottom view which shows the space holder for a reinforcing bar which concerns on embodiment. It is a right side view which shows the space holder for a reinforcing bar attached to the upper end of a formwork and a horizontal reinforcing bar. It is explanatory drawing which shows the outer formwork and the foundation reinforcing bar which attached the interval holder for reinforcing bars in a side view. It is explanatory drawing corresponding to FIG. 8 which shows the state which the base part of the foundation concrete was placed. It is explanatory drawing corresponding to FIG. 8 which shows the state of removing the space holder for a reinforcing bar after placing a base part of a foundation concrete. It is explanatory drawing corresponding to FIG. 8 which shows the state which the inner formwork is installed on the base part of the foundation concrete. It is explanatory drawing corresponding to FIG. 8 which shows the state in which the cloth foundation part of the foundation concrete is placed. It is a right side view which shows the space holder for a reinforcing bar which concerns on 1st modification. It is a right side view which shows the space holder for a reinforcing bar which concerns on the 2nd modification.

Hereinafter, an embodiment in which the space holder for reinforcing bars of the present invention is embodied will be described with reference to the drawings.

(1. Overall configuration of spacing holder 1 for reinforcing bars)
First, the overall configuration of the reinforcing bar spacing holder 1 of the present embodiment will be described with reference to FIGS. 1 to 7. 1 is a perspective view showing a reinforcing bar spacing holder 1, FIG. 2 is a front view, FIG. 3 is a rear view, FIG. 4 is a right side view, FIG. 5 is a plan view, and FIG. 6 is a bottom view. Further, FIG. 7 is a right side view showing the upper end of the form K and the reinforcing bar spacing holder 1 attached to the horizontal reinforcing bar TX. The left side view is omitted because it appears symmetrically with the right side view of FIG.

When the foundation concrete is constructed by the formwork K, the reinforcing bar spacing holder 1 includes the inner surface of the formwork K and the foundation reinforcing bar T composed of a plurality of horizontal reinforcing bars TX and vertical reinforcing bars TY connected in a grid pattern. It is a space-holding tool for reinforcing bars used for maintaining the space between spaces.

The rebar spacing holder 1 is made of metal, and is formed by processing a steel plate such as SGCC (hot-dip galvanized cold-rolled steel plate). As shown in FIGS. 1 to 7, the reinforcing bar spacing holder 1 is located between the formwork engaging portion 10, the horizontal reinforcing bar engaging portion 20, and the formwork engaging portion 10 and the horizontal reinforcing bar engaging portion 20. It is configured to include a connecting portion 30 for connecting the above.

The formwork engaging portion 10 is a portion that can be engaged with the upper end of the formwork K from above. The form engaging portion 10 is formed in a downward U-shape that opens with a width W1 corresponding to the thickness Wk of the form K by bending one end of the rectangular metal plate in the longitudinal direction. The downward U-shape of the formwork engaging portion 10 is formed from a first vertical side 11, a horizontal side 12, and a second vertical side 13 which are provided in order from one end side in the longitudinal direction. The width W1 is set to be larger than the thickness Wk of the mold K by a predetermined width (for example, several mm, preferably 1 to 5 mm).

The horizontal reinforcing bar engaging portion 20 is provided at a predetermined distance W0 in the horizontal direction and at a low position in the vertical direction from the formwork engaging portion 10, and can be engaged with the uppermost horizontal reinforcing bar TX of the basic reinforcing bars T from above. It is a part. The horizontal reinforcing bar engaging portion 20 is provided at the other end in the longitudinal direction of the rectangular metal plate on which the formwork engaging portion 10 is formed, and has a downward U-shape that opens with a width W2 corresponding to the thickness D of the horizontal reinforcing bar TX. It is formed. The width W2 is set to be larger than the thickness D of the horizontal reinforcing bar TX by a predetermined width (for example, several mm, preferably 1 to 5 mm).

The downward U-shape of the horizontal reinforcing bar engaging portion 20 includes a first vertical side 21, a horizontal side 22, and a second vertical side 23, which are provided in order from the side far from the connecting portion 30. The first vertical side 21 is formed by bending the other end of the same rectangular metal plate as the mold engaging portion 10 and the connecting portion 30 at a right angle downward, and the horizontal portion adjacent to the first vertical side 21 has a length W3. The horizontal side is 22. On the other hand, the second vertical side 23 is formed of a metal piece separate from the rectangular metal plate, and is connected to one end of the horizontal side 22 opposite to the first vertical side 21. The fixed structure of the second vertical side 23 will be described in detail later.

The connecting portion 30 is formed in an L shape, and the formwork engaging portion 10 is continuously provided at the end of the L-shaped vertical side 31, and the horizontal reinforcing bar is continuously provided at the end of the L-shaped horizontal side 32. By providing the joint portion 20, the horizontal reinforcing bar engaging portion 20 is separated from the formwork engaging portion 10 by a predetermined interval W0 in the horizontal direction and is low in the vertical direction. Connect with the joint 20.

The second vertical side 23 of the horizontal reinforcing bar engaging portion 20 is arranged so as to hang down on the lower surface of one end of the horizontal side 22 opposite to the first vertical side 21, and is L-shaped laterally to the side surface of the second vertical side 23. It is fixed via a reinforcing piece 40 that connects the lower surface of the side 32.

The reinforcing piece 40 is a metal plate having a right-angled triangular shape when viewed from the side. The reinforcing piece 40 has the hypotenuse 41 facing downward so that the horizontal upper side 42 of the two sides sandwiching the right angle is along the lower surface of the L-shaped horizontal side 32 and the vertical vertical side 43 is along the side surface of the second vertical side 23. Is placed in. Then, the upper side 42 of the reinforcing piece 40 is joined to the lower surface of the L-shaped horizontal side 32 by welding, and the vertical side 43 is joined to the side surface of the second vertical side 23 by welding, so that the side surface of the first vertical side 21 and the L-shaped horizontal side are joined. The lower surface of the side 32 is connected.

(2. Construction method of foundation concrete using the interval holder 1 for reinforcing bars)
Next, a method of constructing the foundation concrete using the reinforcing bar spacing holder 1 will be described with reference to FIGS. 8 to 12. FIG. 8 is an explanatory view showing the outer formwork K and the foundation reinforcing bar T to which the interval holder 1 for reinforcing bars is mounted from a side view, FIG. 9 is a state in which the base portion CB of the foundation concrete is placed, and FIG. FIG. 11 shows a state in which the reinforcing bar spacing holder 1 is removed after placing the base portion CB, FIG. 11 shows a state in which the inner formwork K'is installed on the base portion CB, and FIG. 12 shows a state in which the cloth foundation portion NK is placed. , Each of which is an explanatory diagram corresponding to FIG.

First, as shown in FIG. 8, the reinforcing bar spacing holder 1 engages the formwork engaging portion 10 with the upper part of the formwork K from above, and also via the formwork engaging portion 10 and the connecting portion 30. By engaging the horizontal reinforcing bar engaging portion 20 connected in the above with the horizontal reinforcing bar TX at the uppermost stage of the basic reinforcing bar T from above, the formwork K and the horizontal reinforcing bar TX are attached.

Next, as shown in FIG. 9, ready-mixed concrete is placed in the base portion placing space surrounded by the formwork K. At this time, since the formwork engaging portion 10 of the reinforcing bar spacing holder 1 is engaged with the upper end of the formwork K and the horizontal reinforcing bar engaging portion 20 is engaged with the uppermost horizontal reinforcing bar TX, the formwork A predetermined interval W0 is maintained between the inner surface of K and the foundation reinforcing bar T. After placing the ready-mixed concrete to a predetermined height, leave it for a predetermined time to solidify it.

When the ready-mixed concrete is solidified and the base portion CB is completed, as shown in FIG. 10, the reinforcing bar spacing holder 1 is removed from the formwork K and the horizontal reinforcing bar TX.

Subsequently, as shown in FIG. 11, the inner formwork K'is placed opposite to the outer formwork K by the planned width of the cloth base portion NK, and is installed on the base portion CB.

Subsequently, as shown in FIG. 12, ready-mixed concrete is placed to a predetermined height in the cloth foundation casting space formed between the outer formwork K and the inner formwork K', and the ready-mixed concrete is placed for a predetermined time. Leave to solidify. After the ready-mixed concrete is solidified and the cloth foundation NK is completed, the outer formwork K and the inner formwork K'are dismantled to complete the construction of the foundation concrete.

In the foundation concrete construction method according to the present embodiment, after the base portion CB is completed, the reinforcing bar spacing holder 1 is removed and then the cloth foundation portion NK is constructed. Therefore, the reinforcing bar spacing holder 1 is used as a foreign substance in the concrete. It is not buried and does not affect the strength of the foundation concrete.

(3. Summary of Embodiment)
The reinforcing bar spacing holder 1 according to the present embodiment is a reinforcing bar spacing holder used for maintaining the spacing between the formwork K and the foundation reinforcing bar T when constructing the foundation concrete with the formwork K. The formwork engaging portion 10 that can be engaged from above on the formwork K is provided at a predetermined distance W0 in the horizontal direction and at a low position in the vertical direction from the formwork engaging portion 10, and the basic reinforcing bar T is provided. Among them, a horizontal reinforcing bar engaging portion 20 that can be engaged with the uppermost horizontal reinforcing bar TX from above, and a connecting portion 30 that connects between the formwork engaging portion 10 and the horizontal reinforcing bar engaging portion 20 are provided.

According to this configuration, the formwork engaging portion 10 of the reinforcing bar spacing holder 1 is engaged with the upper part of the formwork K from above, and is laterally connected to the formwork engaging portion 10 via the connecting portion 30. By engaging the reinforcing bar engaging portion 20 with the uppermost horizontal reinforcing bar TX in the foundation reinforcing bar T at a predetermined distance W0 in the horizontal direction and at a low position in the vertical direction from above, the formwork K A predetermined distance W0 can be maintained between the side surface of the structure and the foundation reinforcing bar T. Then, when the base portion CB of the foundation concrete and the cloth foundation portion NK are formed by double striking, a predetermined interval W0 is provided between the inner surface of the outer formwork K and the foundation reinforcing bar T by the reinforcing bar spacing holder 1. After placing ready-mixed concrete in the holding state to form the base part CB, remove the rebar spacing holder 1 and install the inner formwork K'and place the ready-mixed concrete to form the cloth foundation part NK. By forming it, a predetermined interval (cover) W0 can be secured between the foundation reinforcing bar T and the outer surface of the foundation concrete. Therefore, there is an effect that it is possible to provide a reinforcing bar spacing holder 1 capable of holding a predetermined spacing W0 between the inner surface of the form K and the foundation reinforcing bar T without affecting the strength of the foundation concrete. Play.

Further, the formwork engaging portion 10 is formed in a downward U-shape that opens with a width corresponding to the thickness of the formwork K, and the horizontal reinforcing bar engaging portion 20 opens with a width corresponding to the thickness of the horizontal reinforcing bar TX. The connecting portion 30 is formed in a downward U-shape, and the connecting portion 30 is formed in an L-shaped cross section, and the formwork engaging portion 10 is continuously provided at the end on the L-shaped vertical side 31 side, and the L-shaped horizontal side 32. A horizontal reinforcing bar engaging portion 20 is continuously provided at the side end portion.

According to this configuration, the formwork engaging portion 10 continuously provided at the end of the connecting portion 30 on the L-shaped vertical side 31 side and formed in a downward U-shape corresponds to the thickness of the formwork K. Since it is opened with a width, it can be securely engaged with the upper end of the form K from above. On the other hand, the horizontal reinforcing bar engaging portion 20 which is continuously provided at the end of the connecting portion 30 on the L-shaped lateral side 32 side and formed in a downward U-shape is a connecting portion 30 rather than the formwork engaging portion 10. Since the opening is widened to correspond to the thickness of the horizontal reinforcing bar TX at a position lowered by the height, the uppermost horizontal reinforcing bar TX of the basic reinforcing bar T is located at a predetermined interval W0 away from the inner side surface of the form K. Can be securely engaged from above. Therefore, a predetermined interval W0 can be reliably held between the inner surface of the form K and the foundation reinforcing bar T.

Further, the downward U-shape of the horizontal reinforcing bar engaging portion 20 is composed of a first vertical side 21, a horizontal side 22, and a second vertical side 23 provided in order from the side far from the connecting portion 30, and the mold engaging portion 10 The downward U-shape, the L-shape of the connecting portion 30, the first vertical side 21 and the horizontal side 22 of the horizontal reinforcing bar engaging portion 20 are formed integrally by bending one rectangular metal plate, and are laterally formed. The second vertical side 23 of the reinforcing bar engaging portion 20 is formed by fixing and integrating a metal piece separate from the rectangular metal plate.

According to this configuration, the entire reinforcing bar spacing holder 1 except for the second vertical side 23 of the horizontal reinforcing bar engaging portion 20 is integrally formed by bending one rectangular metal plate, and the horizontal reinforcing bar engaging portion 20 is formed integrally. Since the second vertical side 23 is formed by fixing and integrally forming a separate metal piece, a structure having a downward U-shape in each of the formwork engaging portion 10 and the horizontal reinforcing bar engaging portion 20 can be simplified. It can be realized while ensuring the strength by processing.

Further, the second vertical side 23 is arranged so as to hang down on the lower surface of the end portion of the horizontal side 22 near the connecting portion, and the reinforcing piece 40 connecting the side surface of the second vertical side 23 and the lower surface of the L-shaped horizontal side 32. It is fixed via.

According to this configuration, the side surface of the second vertical side 23 made of a separate metal plate is connected to the lower surface of the L-shaped horizontal side 32 via the reinforcing piece 40, so that the second vertical side 23 is closer to the connecting portion of the horizontal side 22. It is firmly fixed in a posture of hanging on the lower surface of the end.

Further, the reinforcing piece 40 is made of a metal plate having a right-angled triangular shape when viewed from the side, and the oblique side 41 is arranged downward, and the horizontal upper side 42 of the two sides sandwiching the right angle is joined to the lower surface of the L-shaped horizontal side 32. The vertical vertical side 43 is joined to the side surface of the second vertical side 23.

According to this configuration, in the second vertical side 23, the horizontal upper side 42 of the reinforcing piece 40 is joined to the lower surface of the L-shaped horizontal side 32, and the vertical vertical side 43 is joined to the side surface of the second vertical side 23. As a result, the horizontal side 22 is firmly fixed in a hanging position on the lower surface of the end portion near the connecting portion.

(4. First modification)
Next, a first modification of the present invention will be described with reference to FIG. FIG. 13 is a right side view showing the rebar spacing holder 2 according to the first modification. The same configurations as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In the above embodiment, it is different from the rectangular metal plate provided with the downward U-shape of the formwork engaging portion 10, the L-shape of the connecting portion 30, the first vertical side 21 and the horizontal side 22 of the horizontal reinforcing bar engaging portion 20. The second vertical side 23 of the horizontal reinforcing bar engaging portion 20 was formed by the body, and was integrated by joining. On the other hand, as shown in FIG. 13, the reinforcing bar spacing holder 2 according to the present modification has a downward U-shape of the formwork engaging portion 10, an L-shape of the connecting portion 30, and a horizontal reinforcing bar engaging portion 20. The downward U-shape is formed by bending one rectangular metal plate and integrally forming it.

More specifically, the lower end of the L-shaped vertical side 31 of the connecting portion 30 extends downward to the same height as the lower end of the first vertical side 21 and is bent at a right angle in the horizontal direction to form the L-shaped horizontal side 32. The L-shaped horizontal side 32 extends horizontally by a predetermined interval W0 and is bent upward at a right angle to form the second vertical side 23 of the horizontal reinforcing bar engaging portion 20. The second vertical side 23 extends to the same height as the horizontal side 22 of the above embodiment and is bent at a right angle in the horizontal direction to form the horizontal side 22. Hereinafter, the horizontal side 22 and the first vertical side 21 are the same as those in the above embodiment.

According to this configuration, since the entire reinforcing bar spacing holder 1 is integrally formed by bending one rectangular metal plate, the formwork engaging portion 10 and the horizontal reinforcing bar engaging portion 20 have a downward U-shape, respectively. A structure having a shape can be realized with a small number of parts.

(5. Second modification)
Next, a second modification of the present invention will be described with reference to FIG. FIG. 14 is a right side view showing the reinforcing bar spacing holder 3 according to the second modification. In the above embodiment, the second vertical side 23 is fixed via the reinforcing piece 40, but the reinforcing bar spacing holder 3 according to this modified example has the second vertical side 23 as shown in FIG. Is made of an upside-down L-shaped metal plate, is arranged in a posture of hanging on the lower surface of the end portion near the connection portion of the horizontal side 22, and is fixed by screwing the screw 50.

According to this configuration, the second vertical side 23 made of a separate metal plate is firmly fixed by screwing in a posture of hanging from the lower surface of the end portion near the connection portion of the horizontal side 22, so that the horizontal reinforcing bar is engaged. A downward U-shape of the joint 20 is formed. This modification also has the same effect as that of the above embodiment.

(6. Other modified examples)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, the connecting portion 30 is formed in an L shape so that the horizontal reinforcing bar engaging portion 20 is separated from the formwork engaging portion by a predetermined interval in the horizontal direction and is at a low position in the vertical direction. However, it is not limited to this. For example, the connecting portion 30 may be formed in an inverted L shape, or may be formed in a straight line inclined downward from the formwork engaging portion 10 toward the horizontal reinforcing bar engaging portion 20.

1 Spacing tool for reinforcing bars (embodiment)
2 Reinforcing bar spacing holder (first modification)
3 Reinforcing bar spacing holder (second modification)
10 Form engaging part 20 Horizontal reinforcing bar engaging part 21 1st vertical side 22 Horizontal side 23 2nd vertical side 30 Connection part 31 L-shaped vertical side 32 L-shaped horizontal side 40 Reinforcing piece 41 Hypotenuse 42 Upper side 43 Vertical side T foundation Reinforcing bar TX Horizontal reinforcing bar TY Vertical reinforcing bar

Claims (7)

A reinforcing bar spacing holder used to maintain the spacing between the inner surface of the formwork and the foundation reinforcing bars when constructing foundation concrete using the formwork.
A formwork engaging portion that can be engaged with the upper end of the formwork from above,
A horizontal reinforcing bar engaging portion that is provided at a predetermined distance in the horizontal direction and at a low position in the vertical direction from the formwork engaging portion and is capable of engaging with the uppermost horizontal reinforcing bar in the foundation reinforcing bar from above.
A connecting portion that connects the formwork engaging portion and the horizontal reinforcing bar engaging portion,
Spacing tool for reinforcing bars. The formwork engaging portion is formed in a downward U-shape that opens with a width corresponding to the thickness of the formwork.
The horizontal reinforcing bar engaging portion is formed in a downward U-shape that opens with a width corresponding to the thickness of the horizontal reinforcing bar.
The connecting portion is formed in an L shape, the formwork engaging portion is continuously provided at the end of the L-shaped vertical side, and the horizontal reinforcing bar engaging portion is continuously provided at the end of the L-shaped horizontal side. The space-holding tool for reinforcing bars according to claim 1, wherein is provided. The downward U-shape of the horizontal reinforcing bar engaging portion comprises a first vertical side, a horizontal side, and a second vertical side, which are provided in order from the side far from the connecting portion.
The downward U-shape of the formwork engaging portion, the L-shape of the connecting portion, the first vertical side and the horizontal side of the horizontal reinforcing bar engaging portion are integrally formed by bending one rectangular metal plate. And
The space-holding tool for reinforcing bars according to claim 2, wherein the second vertical side of the horizontal reinforcing bar engaging portion is formed by fixing and integrating a metal piece separate from the rectangular metal plate. The second vertical side is arranged so as to hang down on the lower surface of the end portion closer to the connection portion of the horizontal side, and via a reinforcing piece connecting the side surface of the second vertical side and the lower surface of the L-shaped horizontal side. The spacing holder for reinforcing bars according to claim 3, which is fixed. The reinforcing piece is made of a metal plate having a right-angled triangular shape when viewed from the side, and the hypotenuse is arranged downward, and the horizontal upper side of the two sides sandwiching the right angle is joined to the lower surface of the L-shaped horizontal side and is a vertical vertical side. The spacing holder for reinforcing bars according to claim 4, wherein is joined to the side surface of the second vertical side. The third aspect of claim 3, wherein the second vertical side is made of an upside-down L-shaped metal plate, is arranged in a posture of hanging from the lower surface of the end portion near the connection portion of the horizontal side, and is fixed by screwing. Spacing tool for reinforcing bars. The downward U-shape of the formwork engaging portion, the L-shape of the connection portion, and the downward U-shape of the horizontal reinforcing bar engaging portion are integrally formed by bending one rectangular metal plate. The spacing holder for reinforcing bars according to claim 2.

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