JP4233772B2 - Spacing retainer for concrete bar structure reinforcing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spacing holder for a concrete bar-shaped structure reinforcing instrument.
[0002]
[Background]
Conventionally, reinforced concrete structures are often used in the fields of architecture and civil engineering. For example, in buildings such as buildings and structures such as bridges, many rod-shaped columns and beams are formed, and these columns and beams are rod-shaped and therefore receive bending and shearing forces in each direction. In particular, the pillar receives the axial force at the same time.
In such a column or beam, when the axial force becomes excessive due to an earthquake or the like, a part of the column in the axial direction may expand over the entire circumference and be collapsed. Further, if the bending force is excessive, there is a possibility that expansion occurs on the side where compression due to bending occurs, leading to crushing, and tearing due to tension occurs on the opposite side. Furthermore, if the shearing force is excessive, cracks in an oblique direction with respect to the axial direction are generated, which may cause shear fracture.
[0003]
For this reason, there is a concrete rod-like structure reinforcement device proposed by the present applicant as a concrete column and beam reinforcement device (see Japanese Patent Application Laid-Open No. 2000-34842).
According to this proposal, this reinforcing instrument has a plurality of engaging members engaged with the surfaces of columns and beams as concrete rod-like structures, and tightening members that connect the engaging members. By applying a tensile force to the tightening member, the engaging member compresses the structure in the direction crossing the axial direction, and the columns and beams that are the structure can be reliably reinforced. it can.
Further, reinforced concrete columns have a structure in which one-turn hoop bars are arranged at regular intervals around the main bars.
[0004]
[Problems to be solved by the invention]
When installing a reinforcing device for a concrete rod-like structure proposed by the applicant on a pillar, etc., first mark the installation position of the reinforcing tool with chalk or the like so that the pillar is surrounded by a stable place such as a column base. Temporarily assemble a reinforcing device, and lift the temporarily assembled reinforcing device by hand along the pillar and move it to the installation location. After that, another worker introduced a tension force while the worker supported the reinforcement device with his hand.
On the other hand, in the installation of the one-turn hoop muscle, after marking the installation position and winding it around the main muscle at this installation position, the end parts are joined together by welding while being supported by the hand and fixed. It was.
Therefore, it is necessary to mark the installation position when installing these reinforcing instruments, and it takes time for the installation work. In addition, since the worker supports these reinforcing instruments by hand, it is difficult to accurately install the reinforcing instruments at regular intervals.
[0005]
The objective of this invention is providing the space | interval holder which can install the reinforcement tool which reinforces a concrete rod-shaped structure accurately and efficiently by a fixed space | interval.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following configuration.
The invention according to claim 1 is an interval holder for a concrete rod-shaped structure reinforcing instrument for keeping a constant interval between adjacent reinforcing instruments among a plurality of reinforcing instruments arranged in the axial direction of the concrete rod-shaped structure. And a temporary fixing member for temporarily fixing the main body to one of the contacting reinforcing tools, and the temporary fixing member includes a magnet. Features.
[0007]
According to the invention of this configuration, when installing the reinforcing instrument, one edge of the main body is brought into contact with one reinforcing instrument, and the other reinforcing instrument is brought into contact with the other edge of the main body. It is possible to install the reinforcing devices with a certain interval and accuracy.
Furthermore, the ink marking work is not required, and the efficiency of the installation work of the reinforcing tool is improved. Since the temporary fixing member has a magnet, it is easy to remove the interval holder after temporarily fixing the main body and installing the reinforcing device.
In addition, since the main body is temporarily fixed to the reinforcing device by the temporary fixing member, even an operator can perform the installation work of the reinforcing device while maintaining the interval. Furthermore, when the concrete rod-like structure extends substantially in the vertical direction, it is possible to install not only the reinforcing instrument from below the structure but also from above. In addition, the work can be performed efficiently without the possibility of the main body coming off during the installation work of the reinforcing instrument.
[0008]
When installing the reinforcing devices, the temporary fixing member may be removed while the main body is installed between the adjacent reinforcing devices, and the main body may be removed at a time after all the reinforcing devices are installed. The main body may be removed and installed every time one reinforcing device is installed.
[0009]
According to a second aspect of the present invention, in the interval holder of the concrete bar-shaped structure reinforcing instrument according to the first aspect, the dimension along the axial direction of the concrete bar-shaped structure of the main body is a dimension between the adjacent reinforcing instruments. It is equal to.
According to the invention of this configuration, the dimension along the axial direction of the concrete rod-like structure of the main body corresponds to the dimension between the adjacent reinforcing instruments. Reinforcing equipment can be installed while maintaining the interval.
[0010]
According to a third aspect of the present invention, in the interval holder of the concrete bar-shaped structure reinforcing instrument according to the first or second aspect, the main body has a concave portion, and the temporary fixing member has a convex portion that fits into the concave portion. A portion is provided.
[0011]
According to the invention of this configuration, the concave portion is formed in the main body, and the temporary fixing member is provided with the convex portion that fits into the concave portion. The member can be easily attached. Furthermore, in a state where the temporarily fixing member is temporarily fixed, it is difficult to come off from the main body.
[0012]
According to a fourth aspect of the present invention, in the interval holder of the concrete bar-shaped structure reinforcing instrument according to any one of the first to third aspects, the temporary fixing member is provided with a grip portion.
[0013]
According to the invention of this configuration, since the grip portion is provided, the temporary fixing member can be easily attached. Moreover, even if the magnet of the temporary fixing member is strong, the grip portion can be pinched so that the removal is easy.
[0014]
According to a fifth aspect of the present invention, in the interval holder for the concrete bar-shaped structure reinforcing instrument according to any one of the first to fourth aspects, the reinforcing instrument is engaged with a plurality of engaging members engaged with the surface of the concrete bar-shaped structure. And a plurality of fastening members that are arranged along the surface of the structure and connect the engaging members to each other, and the engaging member causes the structure to be pulled by a tensile force applied to these fastening members. It is compressible in a direction orthogonal to the axial direction.
[0015]
According to the invention of this configuration, the main body is brought into contact with the engaging member of one reinforcing device already installed, and the engaging member of the other reinforcing device to be installed is brought into contact with this main body. Reinforcing equipment can be installed accurately at regular intervals.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an overall side view of a column 20 as a concrete rod-like structure to which an embodiment of the present invention is applied. This column 20 is a concrete quadrangular columnar body formed on a part of the reinforced concrete building 10 and formed on the floor 11 to support the floor 12 on the upper floor side. The column 20 has a reinforcing material (not shown), which is connected to the reinforcing material in the upper and lower floor portions 11 and 12 and the reinforcing material in the lower foundation 13 and the upper beam 14. Has been.
In the present embodiment, the pillar 20 is provided on the first floor portion as the foundation 13 is illustrated, but the present invention may be applied to a pillar provided on the second floor or higher or in an underground level.
Reinforcing devices 30 that surround the four circumferences in the axial direction are arranged in the column 20 in a plurality of stages at regular intervals with a vertical spacing. The space | interval between each reinforcement implement 30 is not specifically limited, In the implementation, you may determine suitably.
[0017]
FIG. 2 shows an overall plan view of the reinforcing device 30. The reinforcing device 30 includes four corner pieces 31 that are engaged with the corners 21 of the pillars 20 and four fastening members 32 that are horizontally disposed along the surface 22 of the pillars 20 and connect the corner pieces 31 to each other. And.
[0018]
FIG. 3 shows an enlarged cross-sectional view of the reinforcing device 30.
The corner piece 31 is manufactured as a cast product of a metal material, and includes two pieces 312 having a substantially L-shaped cross section, and each piece 312 is a contact surface applied to the surfaces 22 of the pillar 20 that are orthogonal to each other. 311. The corner piece 31 may be created by an arbitrary processing method such as machining by machining.
One piece 312 of the corner piece 31 is provided with an insertion hole 313 through which the piece 312 is inserted. The insertion hole 313 has a diameter larger than that of the insertion hole 313 at the side end of the other piece 312. For example, it has a pocket part 315 in which a female screw is engraved on the inner surface. On the other piece 312 of the corner piece 31, a female screw 314 is engraved in a direction orthogonal to the insertion hole 313.
[0019]
The tightening member 32 includes a bolt 321 that is inserted into the insertion hole 313 of the corner piece 31 and a nut 322 that is screwed to the base end side of the bolt 321.
The bolt 321 is a PC steel rod, and a male screw 324 that is screwed into the female screw 314 of the corner piece 31 is engraved at the tip, and a male screw 325 is engraved at the base end side.
In addition, a groove 323 is provided on the base end surface of the bolt 321, and a male screw 324 on the distal end side of the bolt 321 is easily screwed onto the female screw 314 of the corner piece 31 by locking a screwdriver or the like in the groove 323 and rotating the groove 323. It is possible to combine.
[0020]
The nut 322 is screwed into the male screw 325 on the base end side of the bolt 321, and engages with the bottom surface of the pocket portion 315 of the corner piece 31.
A bolt lid 316 that conceals the insertion hole 313 is screwed into the pocket portion 315 of the corner piece 31 so that even if the tip of the bolt 321 is detached from the corner piece 31, the bolt 321 does not jump out of the insertion hole 313. It has become.
[0021]
In the reinforcing device 30 as described above, the corner pieces 31 are arranged at the respective corners 21 of the column 20, and the corner pieces 31 are connected by the fastening members 32, and then a tensile force is applied to the bolts 321 of the fastening members 32. As a result, the reaction force is transmitted to the surface 22 via the nut 322 and the contact surface 311 of the corner piece 31, and the column 20 is compressed in a direction (horizontal direction) orthogonal to the axial direction (vertical direction). To do.
[0022]
4 and 5 show a spacing holder according to the present embodiment.
The interval holder 40 is interposed between the corner pieces 31 of the reinforcing instruments 30 adjacent to each other in the vertical direction among the plurality of reinforcing instruments 30, and a main body 41 that abuts against the corner pieces 31, and the main body 41. Is temporarily attached to the lower corner piece 31.
[0023]
The main body 41 is formed by molding a metal in the same L-shaped cross section as the corner piece 31 and abuts the end edges of the upper and lower corner pieces 31 over a predetermined length. The vertical dimension of the main body 41 is equal to the dimension between the corner pieces 31 attached vertically. The main body 41 has a recess 47 formed on the outer surface facing the inner surface applied to the surfaces 22 of the pillar 20 that are orthogonal to each other. The metal on which the main body 41 and the corner piece 31 are formed has a property of being attracted to a magnet such as iron.
[0024]
The temporary fixing member 42 covers a boundary portion between the lower corner piece 31 and the main body 41 installed thereon, and temporarily fixes the main body 41 to the corner piece 31. A temporary fixing member main body 45 having a substantially L-shaped cross section and a cover 46 attached to the temporary fixing member main body 45 with an adhesive or the like.
The temporary fixing member main body 45 is made of a permanent magnet, and is provided with a through hole 48 and a notch 49. The notch 49 has a shape corresponding to the bolt lid 316.
[0025]
The cover 46 is made of a plastic such as FRP, and the convex portion 51 is integrally formed on the affixing surface that is affixed to the temporary fixing member main body 45. The convex portion 51 is fitted into the concave portion 47 when temporarily fixed, and has substantially the same diameter as the concave portion 47. A cutout 53 having the same size and shape is provided at a position corresponding to the cutout 49 provided in the temporary fixing member main body 45.
Furthermore, a grip 52 is formed on the outer surface of the cover 46 facing the application surface.
The temporary fixing member 42 is assembled by passing the convex portion 51 of the cover 46 through a through hole 48 having substantially the same diameter as the convex portion 51 and attaching the cover 46 to the temporary fixing member main body 45.
[0026]
At the time of temporary fixing, the main body 41 is installed on each corner piece 31 of the reinforcing device 30 already installed. The convex portion 51 of the temporary fixing member 42 is fitted into the concave portion 47 of the main body 41, and the main body 41 is temporarily fixed to the corner piece 31 below the temporary fixing member 42. In this state, another corner piece 31 is arranged on each main body 41, bolts 321 are inserted into these corner pieces 31, and nuts 322 are screwed into these bolts 321 to be temporarily fixed. Further, the nut 322 is sufficiently tightened to give a sufficient tensile force between the corner pieces 31.
[0027]
Similarly, the main body 41 is installed on each newly installed corner piece 31. Thereafter, the temporary fixing member 42 is removed from the main body 41 and the corner piece 31, and the main body 41 is temporarily fixed to the newly installed corner piece 31. By repeating the above operations, a plurality of reinforcing instruments 30 can be installed from the lower side of the column 20 to the upper side. The main body 41 may be removed every time the reinforcing device 30 is installed, or may be removed after all the reinforcing devices 30 are installed.
[0028]
Therefore, according to the present embodiment, among the plurality of reinforcing instruments 30, the main body 41 is interposed between the corner pieces 31 of the vertically adjacent reinforcing instruments 30, and the spacing between these reinforcing instruments 30 is kept constant. Therefore, the reinforcing device 30 can be easily and accurately installed at regular intervals. Moreover, since the vertical dimension of the main body 41 is equal to the dimension between the corner pieces 31 that are mounted vertically, the reinforcing device 30 can be easily installed at a predetermined interval if the corner piece 31 is placed in contact with the main body 41. Can be installed. Furthermore, this eliminates the need for marking out and improves the efficiency of installing the reinforcing instrument 30.
In addition, since the main body 41 is placed on the corner piece 31 of the reinforcing device 30 that has already been installed, and the corner piece 31 of the upper reinforcing device 30 is placed thereon, the upper corner piece 31 is placed on the lower side via the main body 41. The corner piece 31 is supported. Since the worker does not need to manually support the reinforcing device 30 temporarily assembled as in the prior art and one worker can apply a tensile force to the tightening member, work efficiency can be improved.
[0029]
Furthermore, since the main body 41 is temporarily fixed to the corner piece 31 by the temporary fixing member 42, there is no possibility that the main body 41 is detached during the installation work of the reinforcing instrument 30, and the installation work can be performed efficiently. Further, since the notch 49 and the notch 53 are provided in the temporary fixing member main body 45 and the cover 46, the bolt lid 316 does not interfere with the temporary fixing, and the main body 41 is temporarily fixed to the corner piece 31 more securely. be able to.
Since the temporary fixing member 42 has the temporary fixing member main body 45 which is a magnet, the temporary fixing and removal of the main body 41 are easy.
A concave portion 47 is formed in the main body 41, and a convex portion 51 fitted to the concave portion 47 is provided in the temporary fixing member main body 45, and the attachment position of the temporary fixing member 42 is determined. The member 42 can be easily attached.
Since the temporary fixing member 42 has the grip portion 52, the temporary fixing member 42 can be easily attached. Even if the magnet of the temporary fixing member 42 is strong, the grip portion 52 can be pinched, so that the removal is easy.
[0030]
It should be noted that the present invention is not limited to the above-described embodiment, but includes modifications and improvements as long as the object of the present invention can be achieved.
For example, although the concave portion 47 is provided in the main body 41 and the convex portion 51 is provided in the temporary fixing member 42, these may not be provided as shown in FIG.
Further, as shown in FIG. 7, the temporary fixing member 42 is formed in an L-shaped section having a substantially right angle and a size that substantially covers the outer surface of the corner piece 31, and grips 52 are provided at both ends of the temporary fixing member. Also good. In this way, when the temporary fixing member 42 is installed, both end portions of the temporary fixing member main body 45 do not come into contact with the outer surface of the piece 312 and the outer surface of the main body 41. Therefore, at the time of removal, the temporary fixing member 42 can be removed simply by inclining the temporary fixing member 42 in the one end direction P where the temporary fixing member 42 is not in contact, and the removal becomes easy.
[0031]
The main body 41 and the corner piece 31 are arbitrary as long as they are magnetic metals or the like. The cover 46 is made of plastic, but may be metal or the like.
In the embodiment described above, the reinforcing device 30 is installed from below the pillar 20, but the reinforcing device 30 may be installed from above the column 20 depending on the situation.
Further, the reinforcing device 30 is not limited to the one in the present embodiment, and may be a one-turn hoop line or the like.
Furthermore, although the temporary fixing member main body 45 is a permanent magnet, an electromagnet may be used. If an electromagnet is used, it can be removed without requiring a large force by simply turning off the power supply when removing the temporary fixing member.
In addition, although the vertical dimension of the main body 41 is equal to the dimension between the corner pieces 31 attached vertically at equal intervals, the interval between the corner pieces 31 may be different. In this case, the vertical dimension of the main body 41 is determined in accordance with the interval between the different corner pieces 31.
[0032]
【The invention's effect】
According to such this invention, there exists an effect that the space | interval holder which can install the reinforcement implement which reinforces a concrete rod-shaped structure accurately and efficiently by a fixed space | interval can be provided.
[Brief description of the drawings]
FIG. 1 is an overall side view showing a concrete rod-like structure according to an embodiment of the present invention.
FIG. 2 is an overall plan view showing a reinforcing instrument according to the embodiment.
FIG. 3 is an enlarged cross-sectional view showing a reinforcing instrument according to the embodiment.
FIG. 4 is a perspective view of an interval holder according to the embodiment.
FIG. 5 is an exploded perspective view of the interval holder according to the embodiment.
FIG. 6 is an exploded perspective view showing a modification of the interval holder according to the embodiment.
FIG. 7 is a plan view showing a modification of the interval holder according to the embodiment.
[Explanation of symbols]
20 Column 22 as concrete rod-like structure Column surface 30 Reinforcing tool 31 Corner piece 32 Tightening member 40 Spacing holder 41 Main body 42 Temporary fixing member 47 Concave portion 51 Convex portion 52 Grasping portion

Claims (5)

An interval holder for a concrete rod-shaped structure reinforcing instrument for maintaining a constant spacing between adjacent reinforcing instruments among a plurality of reinforcing instruments arranged in the axial direction of the concrete rod-shaped structure,
A main body with which both side edge portions are in contact with the adjacent reinforcing device, and a temporary fixing member that temporarily fixes the main body to one reinforcing device to be contacted,
The temporary holding member has a magnet, and is a spacing holder for a concrete bar-like structure reinforcing instrument. In the interval holder of the concrete bar-shaped structure reinforcing instrument according to claim 1,
An interval holder for a concrete bar-shaped structure reinforcing instrument, wherein a dimension of the main body along the axial direction of the concrete bar-shaped structure is equal to a dimension between adjacent reinforcing instruments. In the interval holder of the concrete bar-shaped structure reinforcing instrument according to claim 1 or 2,
A gap retainer for a concrete bar-shaped structure reinforcing instrument, wherein a concave portion is formed in the main body, and a convex portion that is fitted into the concave portion is provided in the temporary fixing member. In the space | interval holder of the concrete rod-shaped structure reinforcement instrument in any one of Claim 1 to 3,
The temporary holding member is provided with a grip portion. The space retainer for a concrete bar-like structure reinforcing instrument. In the space | interval holder of the concrete bar-shaped structure reinforcement instrument in any one of Claim 1 to 4,
The reinforcing device includes a plurality of engaging members engaged with the surface of a concrete bar-like structure, and a plurality of tightening members arranged along the surface of the structure to connect the engaging members. A spacing retainer for a concrete bar-shaped structure reinforcing instrument, wherein the engaging member is capable of compressing the structure in a direction orthogonal to the axial direction by a tensile force applied to these tightening members. .

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