JP7058004B2 - Tie bar holder - Google Patents

Description

The present invention relates to a tie bar holder that holds a tie bar embedded in concrete together with a reinforcing bar for concrete pavement.

Conventionally, when constructing concrete pavement, reinforcing bars are laid inside the concrete to reinforce the concrete slab and prevent cracks and the like. This reinforcing bar is composed of vertical bars and horizontal bars, and is laid flat at a predetermined height inside the paved concrete.

On the other hand, when constructing concrete pavement in a narrow space such as in a tunnel, or when it is not possible to construct the entire width at once, such as when constructing while allowing one-sided traffic, first construct one side and then the other side. I am doing it.

In the case of constructing one side at a time in this way, in order to ensure the continuity between the concrete slab constructed earlier and the concrete slab constructed later, a connecting reinforcing bar called a tie bar is embedded.

In order to bury the tie bar inside the concrete, it is necessary to hold the tie bar in a predetermined position in the state before placing the concrete. Generally, the position of the concrete pavement reinforcing bar is about 2/3 of the height of the pavement, while the position of the tie bar is about 1/2 of the height of the pavement. Therefore, conventionally, a pedestal with a processed reinforcing bar called a chair on which a tie bar is installed has been used, and the tie bar is placed on the chair in the direction orthogonal to the vertical bar (toward the construction part on the opposite side). It was supposed to be held in the position of.

On the other hand, in Patent Document 1 and Patent Document 2, a beam portion spanned between two adjacent vertical bars and a through hole through which tie bars provided at both ends of the beam portion pass are formed. An invention relating to a tie bar holding portion (reinforcing bar holder) having a support portion is described, and a tie bar is suspended from a vertical bar of a concrete pavement reinforcing bar held at a height of about 2/3 of the pavement thickness. Is designed to hold.

Utility Model Registration No. 3140674 Gazette Utility Model Registration No. 3151740 Gazette

However, the conventional holding method using a chair has a problem that the position of the held tie bar shifts due to the pressure of the concrete flow at the time of placing concrete.

Further, in the case of the tie bar holder described in Patent Document 1 and Patent Document 2, since they are suspended from two adjacent vertical bars of concrete pavement reinforcing bars, they are bridged depending on the distance between the two adjacent vertical bars. There was a problem that a gap was created between the beam and the tie bar, and the tie bar was tilted due to the pressure of the concrete flow. In addition, there is a problem that the tie bar holder itself moves on the vertical streaks.

The present invention solves the above-mentioned conventional problems, and provides a tie bar holder for preventing misalignment at the time of placing concrete.

In order to solve the above problems, the tie bar holder of the present invention is composed of a plurality of vertical bars made of deformed reinforcing bars having irregularities on the outer periphery and a plurality of horizontal bars connected to the plurality of vertical bars. A tie bar holder that holds a tie bar embedded in concrete together with a reinforcing bar for concrete pavement, and is fitted into a support portion provided with a through hole through which the tie bar is inserted and a recess formed on the outer periphery of the vertical bar. It is characterized by having a hanging lower portion for suspending the support portion from the vertical bar.

Further, it is preferable that the support portion is composed of two parallel plate-shaped members, and the hanging lower portion is composed of a hook-shaped member provided on the upper portion of each of the two plate-shaped members.

Further, it is preferable that the support portion is composed of two parallel plate-shaped members, and the suspension lower portion is composed of a connecting member connecting the upper portions of the two plate-shaped members.

Further, it is preferable that a protrusion abutting the vertical streak is provided on the upper portion of the plate-shaped member.

The tie bar holder of the present invention is provided in concrete together with a concrete pavement reinforcing bar composed of a plurality of vertical bars composed of irregularly shaped reinforcing bars having irregularities on the outer periphery and a plurality of horizontal bars connected to the plurality of vertical bars. It is a tie bar holder that holds the tie bar to be buried, and has a support portion and a hanging lower portion. The support portion is provided with a through hole through which the tie bar is inserted, and the support portion is suspended from the vertical streak by the hanging lower portion. Therefore, the tie bar is inserted through the through hole and held at a predetermined height. can do. Since the hanging lower portion is fitted into the concave portion formed on the outer circumference of the vertical streak, it is possible to prevent the position shift at the time of placing concrete.

Further, when the support portion is composed of two parallel plate-shaped members and the hanging lower portion is composed of a hook-shaped member provided above each of the two plate-shaped members, the hook-shaped member is attached to the outer periphery of the vertical streak. It can be fitted in the recess formed in the above to prevent misalignment.

Further, when the support portion is composed of two parallel plate-shaped members and the hanging lower portion is composed of a connecting member connecting the upper portions of the two plate-shaped members, the concave portion formed on the outer periphery of the vertical streaks of the connecting member. It can be fitted to and prevented from being displaced.

Further, when a protrusion that abuts on the vertical streaks is provided on the upper portion of the plate-shaped member, it is possible to more effectively prevent misalignment while abuting the vertical streaks on the protrusion.

As described above, according to the present invention, it is possible to provide a tie bar holder that prevents misalignment at the time of placing concrete.

It is a top view which shows the reinforcing bar for concrete pavement which concerns on embodiment of this invention. It is a top view which shows the reinforcing bar for concrete pavement which concerns on embodiment of this invention. It is an enlarged plan view which shows the connecting part of the reinforcing bar for concrete pavement. It is an enlarged sectional view which shows the connecting part of the reinforcing bar for concrete pavement. It is (A) front view and (B) side view which shows the tie bar holder which concerns on Embodiment 1 of this invention. It is a perspective view which shows the use state of the tie bar holder which concerns on Embodiment 1. FIG. It is (A) side view and (B) aa-a cross-sectional view which shows the tie bar holder which concerns on Embodiment 2 of this invention. It is a perspective view which shows the use state of the tie bar holder which concerns on Embodiment 2. FIG. It is a top view which shows the state which the reinforcing bar was laid on the paved surface of a paved road.

Next, the tie bar holder according to the embodiment of the present invention will be described with reference to FIGS. 1 to 9. The tie bar holder according to the present embodiment is made of concrete together with concrete pavement reinforcing bars composed of a plurality of vertical bars composed of irregularly shaped reinforcing bars having irregularities on the outer periphery and a plurality of horizontal bars connected to the plurality of vertical bars. It is a tie bar holder that holds the tie bar buried inside.

FIG. 9 is a plan view showing a state in which a plurality of vertical bars 2 and a plurality of horizontal bars 3 are laid on a paved surface of a paved road composed of an up lane 8 and a down lane 9. In this embodiment, a plurality of vertical bars 2 are arranged parallel to the traveling direction of the road, and a plurality of horizontal bars 3 are arranged diagonally with respect to the traveling direction of the road.

(Reinforcing bar for concrete pavement)
First, a concrete pavement reinforcing bar to be buried together with the tie bar holder according to the present embodiment will be described. In the present embodiment, the mesh 1 (reinforcing bar net) shown in FIGS. 1 and 2 is used when laying the plurality of vertical bars 2 and the plurality of horizontal bars 3. The mesh 1 is composed of a plurality of vertical bars 2 and a plurality of horizontal bars 3 connected to the vertical bars 2 and is formed in a wire mesh shape. The plurality of vertical stripes 2 are arranged in parallel with each other. Similarly, the plurality of horizontal bars 3 are arranged in parallel with each other. And in this embodiment, a plurality of horizontal streaks 3 are diagonally connected to a plurality of vertical streaks 2.

The vertical bar 2 and the horizontal bar 3 can be connected by welding or can be bound by a wire or the like. The mesh 1 is formed into an appropriate size in consideration of installation on a paved surface, transportation, and the like. Then, the continuous reinforced concrete pavement can be constructed by sequentially laying the mesh 1 on the paved surface and placing concrete. The vertical streaks 2 and the horizontal streaks 3 project from the ends of the mesh 1 so as to overlap with the adjacent meshes. Further, the protruding position of the mesh 1 is different between FIGS. 1 and 2 so as to correspond to the place where the mesh 1 is installed.

3 and 4 are an enlarged plan view and an enlarged cross-sectional view showing a connecting portion of the mesh 1, respectively. The horizontal streaks 3 are diagonally connected so as to form an angle θ with respect to the vertical streaks 2. The angle θ can be set as appropriate, but is preferably 60 degrees. Further, the vertical streaks 2 and the horizontal streaks 3 are connected so that the horizontal streaks 3 are on the lower side.

(Embodiment 1)
Next, the tie bar holder 10 according to the first embodiment will be described. FIG. 5 is a front view (A) and a side view (B) showing the tie bar holder 10, and FIG. 6 is a perspective view showing a usage state of the tie bar holder 10.

The tie bar holder 10 is composed of a left side main body portion 11 and a right side main body portion 12. In FIG. 5, the left side main body portion 11 is shown by a solid line, and the right side main body portion 12 is shown by a dotted line. Further, the vertical stripe 2 and the tie bar 4 are indicated by a two-dot chain line.

The left main body portion 11 has a support portion 11a made of a plate-shaped member, suspension portions 11b and 11c made of hook-shaped members provided on the upper portion of the support portion 11a, and a protrusion 11d provided on the upper portion of the support portion 11a. ing. A through hole 5 for inserting the holding tie bar 4 is provided in the center of the support portion 11a. The hanging lower portions 11b and 11c are shaped so as to bend while extending upward and to be caught by the vertical streaks 2. The protrusion 11d is provided between the suspension portions 11b and 11c so as to come into contact with the vertical streaks 2.

Similarly, the right main body portion 12 has a support portion 12a made of a plate-shaped member, suspension portions 12b and 12c made of a hook-shaped member provided on the upper portion of the support portion 12a, and a protrusion portion 12d provided on the upper portion of the support portion 12a. have. A through hole 5 for inserting the holding tie bar 4 is provided in the center of the support portion 12a. The hanging lower portions 12c and 12d are shaped so as to bend while extending upward and to be caught by the vertical streaks 2. The protrusion 12d is provided between the suspension portions 12b and 12c so as to come into contact with the vertical streaks 2.

Further, insertion pieces 11e and 11f extending in the longitudinal direction of the vertical streaks 2 are provided at the tips of the suspension portions 11b and 11c of the left main body portion 11. Similarly, insertion pieces 12e and 12f extending in the longitudinal direction of the vertical streaks 2 are provided at the tips of the suspension portions 12b and 12c of the right side main body portion 12. When the tie bar holder 10 is used, the insertion pieces 11e, 11f, 12e, and 12f are inserted under the hanging lower portions 12c, 12d, 11c, and 11d on the other side, respectively. As a result, the left side main body portion 11 and the right side main body portion 12 are more firmly combined.

As described above, the support portions 11a and 12b of the tie bar holder 10 are composed of two parallel plate-shaped members. Further, the hanging lower portions 11b, 11c, 12b, 12c of the tie bar holder 10 are composed of hook-shaped members provided on the upper portions of the two plate-shaped members.

When using the tie bar holder 10, as shown in FIGS. 5 and 6, first, the left side main body portion 11 and the right side main body portion 12 are suspended from the vertical streaks 2. At this time, the hanging lower portions 11b, 11c, 12b, 12c are fitted into the recesses formed on the outer periphery of the vertical streaks 2. Further, the insertion pieces 11e, 11f, 12e, and 12f are inserted under the hanging lower portions 12c, 12d, 11c, and 11d on the other side, respectively. Further, the protrusions 11d and 12d are brought into contact with the vertical streaks 2.

Then, after suspending the two tie bar holders 10 from the two vertical bars 2, the tie bars 4 are inserted into the through holes 5 and 5 of the support portions 11a and 12a of the two tie bar holders 10 respectively. With the above, the holding of the tie bar 4 is completed. The two vertical bars 2 to which the two tie bar holders 10 are attached may be adjacent to each other, or other vertical bars may be present between them. As described above, since the tie bar holder 10 does not have a beam portion, it is not necessary to consider the pitch between the vertical bars, and even if there is a difference in the pitch between the vertical bars, the tie bar holder 10 can be used without any problem.

(Embodiment 2)
Next, the tie bar holder 20 according to the second embodiment will be described. FIG. 7 is a side view (A) and a cross-sectional view taken along the line (B) aa showing the tie bar holder 20, and FIG. 8 is a perspective view showing a usage state of the tie bar holder 20.

The tie bar holder 20 is composed of a left side main body 21 and a right side main body 22. In FIG. 7, the vertical streaks 2 and the tie bar 4 are shown by a two-dot chain line.

The left main body portion 21 has a support portion 21a made of a plate-shaped member, suspension portions 21b and 21c provided on the upper portion of the support portion 21a, and a protrusion portion 21d provided on the upper portion of the support portion 21a. A through hole 6 for inserting the holding tie bar 4 is provided in the center of the support portion 21a. The hanging lower portions 21b and 21c are shaped so as to bend while extending upward and to be caught by the vertical streaks 2. The protrusion 21d is provided between the suspension portions 21b and 21c so as to come into contact with the vertical streaks 2.

Similarly, the right main body portion 22 has a support portion 22a made of a plate-shaped member, suspension portions 22b and 22c provided on the upper portion of the support portion 22a, and a protrusion portion 22d provided on the upper portion of the support portion 22a. .. A through hole 6 for inserting the holding tie bar 4 is provided in the center of the support portion 22a. The hanging lower portions 22c and 22d are shaped so as to bend while extending upward and to be caught by the vertical streaks 2. The protrusion 22d is provided between the suspension portions 22b and 22c so as to come into contact with the vertical streaks 2.

Further, the hanging lower portion 21b of the left main body portion 21 and the hanging lower portion 22b of the right main body portion 22 are connected at the upper part. Similarly, the hanging lower portion 21c of the left main body portion 21 and the hanging lower portion 22c of the right main body portion 22 are connected at the upper part.

As described above, the support portions 21a and 22b of the tie bar holder 20 are composed of two parallel plate-shaped members. Further, the hanging lower portions 21b, 21c, 22b, 22c of the tie bar holder 20 are composed of a connecting member that connects the upper portions of the two plate-shaped members. That is, the left main body 21 and the right main body 22 are integrated.

When using the tie bar holder 20, as shown in FIGS. 7 and 8, first, the connecting portions of the hanging lower portions 21b, 21c, 22b, 22c are fitted into the vertical bars 2 and suspended. At this time, the connecting portions of the hanging lower portions 21b, 21c, 22b, 22c are fitted into the recesses formed on the outer periphery of the vertical streaks 2. Further, the protrusions 21d and 22d are brought into contact with the vertical streaks 2. It should be noted that the tie bar holder 20 before hanging is left in a state where the lower opening is opened from the state shown in FIGS. 7 and 8, and after hanging, the left main body 21 and the right main body 22 are moved. You can press it from both sides to close it.

Then, after suspending the two tie bar holders 20 from the two vertical bars 2, the tie bars 4 are inserted into the through holes 6 and 6 of the support portions 21a and 22a of the two tie bar holders 20 respectively. With the above, the holding of the tie bar 4 is completed. The two vertical bars 2 to which the two tie bar holders 20 are attached may be adjacent to each other, or other vertical bars may be present between them. As described above, since the tie bar holder 20 does not have a beam portion, it is not necessary to consider the pitch between the vertical bars, and even if there is a difference in the pitch between the vertical bars, the tie bar holder 20 can be used without any problem.

The tie bar holders 10 and 20 according to the present embodiment are composed of a plurality of vertical bars 2 made of deformed reinforcing bars having irregularities on the outer periphery and a plurality of horizontal bars 3 connected to the plurality of vertical bars 2. It is a tie bar holder that holds the tie bar 4 embedded in the concrete together with the concrete pavement reinforcing bar (mesh 1), and is a support portion 11a, 12a, 21a, 22a and a suspension lower portion 11b, 11c, 12b, 12c, 21b, 21c, It has 22b and 22c. The support portions 11a, 12a, 21a, 22a are provided with through holes 5, 6 through which the tie bar 4 is inserted, and the support portions 11a are provided by the suspension portions 11b, 11c, 12b, 12c, 21b, 21c, 22b, 22c. , 12a, 21a, 22a are suspended from the vertical streaks 2, so that the tie bar 4 can be inserted through the through holes 5 and 6 and held at a predetermined height. Since the hanging lower portions 11b, 11c, 12b, 12c, 21b, 21c, 22b, 22c are fitted into the recesses formed on the outer periphery of the vertical bar 2, the position shift during concrete placement is prevented. be able to.

Further, the support portions 11a and 12a of the tie bar holder 10 are composed of two parallel plate-shaped members, and the suspension portions 11b, 11c, 12b and 12c are hook-shaped members provided on the upper portions of the two plate-shaped members. Since it is composed of a member, the hook-shaped member can be fitted into a recess formed on the outer periphery of the vertical bar 2 to prevent misalignment.

Further, since the support portions 21a and 22a of the tie bar holder 10 are composed of two parallel plate-shaped members, and the suspension lower portions 21b, 21c, 22b and 22c are composed of connecting members connecting the upper portions of the two plate-shaped members. , The connecting member can be fitted into a recess formed on the outer periphery of the vertical bar 2 to prevent misalignment.

Further, since the protrusions 11d, 12d, 21d, and 22d that abut on the vertical streaks 2 are provided on the upper portion of the plate-shaped member, the protrusions 11d, 12d, 21d, and 22d abut on the vertical streaks 2 more effectively. It is possible to prevent misalignment.

As described above, according to the tie bar holder according to the present embodiment, it is possible to prevent the position shift at the time of placing concrete.

Although the tie bar holder according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various other modifications can be made. For example, in the present embodiment, the concrete pavement reinforcing bar (mesh 1) is such that the vertical bar and the horizontal bar are diagonally connected, but the vertical bar and the horizontal bar may intersect at a right angle.

Further, the concrete pavement reinforcing bar is not a wire mesh-like reinforcing bar in which vertical bars and horizontal bars are connected in advance as in mesh 1, but vertical bars and horizontal bars are laid and bound at the construction site. May be good.

1 Mesh 2 Vertical bar 3 Horizontal bar 4 Tie bar 5 Through hole 6 Through hole 10 Tie bar holder 11 Left body part 11a Support part 11b Suspension bottom 11c Suspension bottom 11d Protrusion part 11e Insert piece 11f Insert piece 12 Right body part 12a Support part 12b Suspension Lower part 12c Suspended lower part 12d Protruding part 12e Insert piece 12f Inserting piece 20 Tie bar holding part 21 Left main body part 21a Support part 21b Suspended lower part 21c Suspended lower part 21d Protruding part 22 Left main body part 22a Supporting part 22b Suspended lower part 22c Suspended lower part 22d Protruding part

Claims (3)

A tie bar embedded in concrete is held together with a concrete pavement reinforcing bar composed of a plurality of vertical bars composed of irregularly shaped reinforcing bars having irregularities on the outer circumference and a plurality of horizontal bars connected to the plurality of vertical bars. It ’s a tie bar holder,
It has a support portion provided with a through hole through which the tie bar is inserted, and a suspension portion that is fitted into a recess formed on the outer circumference of the vertical bar and suspends the support portion to the vertical bar .
A tie bar holder characterized in that the support portion is composed of two parallel plate-shaped members, and the hanging lower portion is composed of a hook-shaped member provided on the upper portion of each of the two plate-shaped members . A tie bar embedded in concrete is held together with a concrete pavement reinforcing bar composed of a plurality of vertical bars composed of irregularly shaped reinforcing bars having irregularities on the outer circumference and a plurality of horizontal bars connected to the plurality of vertical bars. It ’s a tie bar holder,
It has a support portion provided with a through hole through which the tie bar is inserted, and a suspension portion that is fitted into a recess formed on the outer circumference of the vertical bar and suspends the support portion to the vertical bar .
A tie bar holder characterized in that the support portion is composed of two parallel plate-shaped members, and the suspension lower portion is composed of a connecting member connecting the upper portions of the two plate-shaped members . The tie bar holder according to claim 1 or 2 , wherein a protrusion abutting the vertical streak is provided on the upper portion of the plate-shaped member.

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