Reinforcing fitting

Abstract

To provide a reinforcing metal fitting capable of preventing the disconnection of an earthquake-resistant slit and a separator even when vibration from a vibrator is applied. [Solution] The reinforcing metal fitting comprises a stopper 2 that engages with an earthquake-resistant slit 30, a clip 3 that engages with a separator 40, and a connecting rod 4 that connects the stopper 2 and the clip 3. The stopper 2 includes peripheral convex portions 6, 7 that engage with a retaining frame 32, and a connection portion 9 to which one end of the connecting rod 4 is connected. The clip 3 includes a threaded hole that is attached to the other end of the connecting rod 4 and a retaining portion that holds the separator 40. The connecting rod 4 has a left-handed male thread engraved at one end and a right-handed male thread engraved at the other end. The connection portion of the stopper 2 has a left-handed female thread engraved to screw into the left-handed male thread at one end of the connecting rod 4, and the threaded hole of the clip 3 has a right-handed female thread engraved to screw into the right-handed male thread at the other end of the connecting rod 4.

Description

Technical Field

[0001] The present invention relates to a reinforcing fitting, and particularly to a reinforcing fitting for a seismic slit embedded in a concrete wall.

Background Art

[0002] A concrete wall of a building is formed, for example, by placing concrete between an outer formwork and an inner formwork (both formworks). In such a wall, in order to obtain a desired thickness, it is necessary to maintain the two formworks at a predetermined interval during placement. Also, in order to obtain seismic strength and the like, considering the arrangement of steel frames (or columns), etc., after dividing the space between the two formworks into a plurality of regions, it is necessary to place concrete for each region. Therefore, a separator is interposed between the two formworks to maintain the interval, and a seismic slit is interposed between the two formworks to partition the wall into a plurality of regions, and then the above-mentioned concrete placement is performed for each region.

[0003] The above-mentioned seismic slit has a partition wall made of rubber, foamed synthetic resin, etc., and a holding frame that holds both side portions of this partition wall. These holding frames hold a joint bar nailed, etc., inside the two formworks. In this way, concrete is placed for each region partitioned by a plurality of seismic slits. After the building is completed, the partition wall of the seismic slit serves as a buffer material between each region, absorbing the distortion and displacement generated in the building or wall due to an earthquake (or the distortion of the building over time), preventing cracks in the wall, etc., and also relaxing the transmission of distortion stress between the wall and the steel frame.

[0004] In this way, a wall formed with a built-in seismic slit, in combination with a steel frame, enhances the seismic strength of the building, etc., and the seismic slit (mainly a partition wall made of rubber, foamed synthetic resin, etc.) interposed at the boundary portion between each region of the wall serves as a buffer material and has a long service life. However, in order to obtain such a service life, the seismic slit must be reinforced so as not to be deformed or destroyed by the pressure of concrete placement during construction.

[0005] Therefore, for example, a seismic slit and a separator interposed between an outer formwork and an inner formwork are connected by a reinforcing metal fitting to reinforce the seismic slit. Here, as the reinforcing metal fitting, for example, the reinforcing metal fitting 25 as disclosed in Patent Document 1 can be mentioned (see FIG. 2 of Patent Document 1). This reinforcing metal fitting 25 includes a pedestal (stopper) 26, a screw rod (connecting rod) 27, and a clip 28. In the reinforcing metal fitting 25, the pedestal 26 is applied to the side surface of the partition wall of the seismic slit and rotated in one direction. After both ends of the pedestal 26 are inserted into the side grooves of the holding frame of the seismic slit, one end of the screw rod 27 is screwed into the central screw hole of the pedestal 26. As a result, the screw rod 27 protrudes laterally from the pedestal 26. Then, a clip 28 is screwed onto the other end of the screw rod 27 protruding laterally from the pedestal 26. Thereafter, a separator is inserted into the clip 28. In this way, the seismic slit and the separator interposed between the outer formwork and the inner formwork are connected by a reinforcing metal fitting.

[0006] When the seismic slit is connected to the separator by the reinforcing metal fitting, even if concrete is placed in the area partitioned by each seismic slit, it is possible to avoid the seismic slit from being deformed or destroyed by the placing pressure of the concrete.

[0007] By the way, if there are air bubbles in the concrete before hardening, voids will remain inside the hardened concrete, resulting in a deterioration in the quality of the concrete wall. To avoid such a quality deterioration, after placing concrete in the area partitioned by each seismic slit, a bubble removal operation is performed to remove the air bubbles inside the concrete before hardening. This bubble removal operation is performed by inserting a vibrator into the concrete before hardening and applying vibration to the concrete before hardening.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0009] In the above-described bubble removal operation, it is necessary to prevent the vibrator from contacting members such as reinforcing metal fittings and separators interposed between the outer formwork and the inner formwork. However, there are cases where the operator accidentally contacts these members with the vibrator. Thus, when the vibrator contacts the above members, the vibration may cause the screw rod 27 to rotate. If the rotation of the screw rod 27 is in the direction of loosening the fastening with the pedestal 26 or the clip 28, the screw rod 27 may come off the pedestal 26 or the clip 28. When the screw rod 27 comes off the pedestal 26 or the clip 28 in this way, the connection between the seismic slit and the separator is released, and the seismic slit is in an unreinforced state, and may be deformed or damaged by directly receiving the pressure of the placed concrete.

[0010] The present invention has been made in view of such circumstances, and an object thereof is to provide a reinforcing metal fitting that can avoid the disconnection of the connection between the seismic slit and the separator even when the vibration of the vibrator is applied.

Means for Solving the Problems

[0011] To achieve the above object, the reinforcing fitting of the present invention is a reinforcing fitting that connects a seismic slit and a separator interposed between an outer formwork and an inner formwork into which concrete is placed to reinforce the seismic slit, and includes a stopper that engages with a holding frame that holds a side portion of a partition wall included in the seismic slit, a clip that engages with the separator, and a connecting rod that connects the stopper and the clip. The stopper includes an engaging portion that engages with the holding frame and a connecting portion to which one end of the connecting rod is connected. The clip includes a mounting portion that is mounted on the other end of the connecting rod so that the mounting position can be adjusted, and a holding portion that holds the separator. The connecting rod includes a first male screw portion provided at the one end and a second male screw portion provided at the other end. A first male screw that is fastened by rotating in a first direction is engraved on the first male screw portion, and a second male screw that is fastened by rotating in a second direction opposite to the first direction is engraved on the second male screw portion. A first female screw that is screwed into the first male screw is engraved on the connecting portion of the stopper, and a second female screw that is screwed into the second male screw is engraved on the mounting portion of the clip. This is the feature.

[0012] According to this aspect, when performing bubble removal work on the placed concrete, if the vibrator accidentally contacts members such as the reinforcing fitting and the separator interposed between the outer formwork and the inner formwork and vibrates these members, for example, even if the connecting rod is rotated in a direction to loosen the second male screw, for the first male screw, it will rotate in the tightening direction, so the first male screw will tighten and the reinforcing fitting will not be disassembled. Therefore, it is possible to avoid the connection between the seismic slit and the separator being released.

Effects of the Invention

[0013] According to the reinforcing fitting of the present invention, it is possible to provide a reinforcing fitting that can avoid the connection between the seismic slit and the separator being released even when the vibration of the vibrator is applied.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

MODE FOR CARRYING OUT THE INVENTION

[0015] Hereinafter, the reinforcement metal fitting 1 which concerns on one Embodiment of this invention is demonstrated based on drawing. FIG. 1 is the perspective view which showed roughly the arrangement | positioning aspect of the reinforcement metal fitting 1 which concerns on this invention which connects the seismic slit 30 and the separator 40 interposed between the outer form 20 and the inner form 21, and reinforce | supplements the seismic slit 30 with respect to the placing pressure of concrete.

[0016] For the construction of a concrete wall, first, the outer form 20 and the inner form 21 are installed in the position which forms a wall. And both formworks (outer form 20 and inner form 21) are pinched | interposed by the joist, a horizontal batten, a vertical batten, etc. which are not shown in figure, and are positioned in a predetermined position. Thereby, the seismic slit 30 and the separator 40 are pinched | interposed between both formworks.

[0017] As shown in FIG. 1, the seismic slit 30 includes a partition wall 31 formed of rubber, foamed synthetic resin, or the like, and two holding frames 32, 32 that respectively hold both side portions of the partition wall 31. Here, in the seismic slit 30, both side portions of the partition wall 31 are respectively held on one side of the holding frames 32, 32, and the other sides of the holding frames 32, 32 hold the joint bars 22, 23 nailed to the inside of both formworks, and are disposed at a predetermined position between the outer formwork 20 and the inner formwork 21. The seismic slits 30 are disposed at a plurality of locations between both formworks and partition the inside of both formworks into a plurality of regions.

[0018] Here, the holding frame 32 will be described in more detail. As shown in FIG. 2, the holding frame 32 includes a partition wall holding groove 33 provided on one side where the partition wall 31 is present, a joint bar holding groove 34 provided on the other side opposite to the side where the partition wall 31 is present, and side grooves 35, 35 provided on both sides of the partition wall holding groove 33 and extending along the longitudinal direction of the holding frame 32.

[0019] The side portion of the partition wall 31 is fitted into the partition wall holding groove 33. Thereby, the partition wall 31 is held by the holding frame 32.

[0020] The joint bar 22 or the joint bar 23 is fitted into the joint bar holding groove 34. Thereby, the joint bars 22, 23 are held. In other words, the holding frames 32, 32 hold the joint bar 22 nailed to the outer formwork 20 and the joint bar 23 nailed to the inner formwork 21, so that the seismic slit 30 is fixed at a predetermined position between the outer formwork 20 and the inner formwork 21 via the joint bars 22, 23.

[0021] As shown in FIG. 2, the separator 40 has a separator main body 41 in the shape of a rod and cones 42, 43 attached to both ends of the separator main body 41 and having a substantially frustoconical shape with the upper part of the cone cut off, and is firmly clamped between the outer formwork 20 and the inner formwork 21. As shown in FIG. 1, a plurality of separators 40 are installed at a predetermined interval between the outer formwork 20 and the inner formwork 21.

[0022] The seismic slit 30 and the separator 40 as described above are connected by the reinforcing fitting 1. As shown in Fig. 3, this reinforcing fitting 1 includes a stopper 2 as a pedestal, a clip 3 that engages with the separator 40, and a connecting rod 4 that connects the stopper 2 and the clip 3.

[0023] As shown in Fig. 4, the stopper 2 is a member formed by processing a thin metal plate and has an overall elongated elliptical shape. The stopper 2 has a flat main body portion 5 at the center. At the peripheries of both ends 5a and 5b in the longitudinal direction of the main body portion 5, the peripheries are bent in the thickness direction, thereby forming peripheral convex portions 6 and 7. These peripheral convex portions 6 and 7 serve as engaging portions that engage with the side grooves 35 of the holding frame 32 of the seismic slit 30. The thickness of the peripheral convex portions 6 and 7 is set to be approximately the same as the groove width of the side grooves 35. Thereby, the peripheral convex portions 6 and 7 can be fitted into the side grooves 35, and the stopper 2 can be fixed at an arbitrary position of the side grooves 35. Further, at the center of the main body portion 5, a connecting portion 9 to which one end portion 8 of the connecting rod 4 is connected is formed. The connecting portion 9 is a boss protruding from the main body portion 5, and an internal female thread (first female thread) 9a is engraved therein.

[0024] As shown in Fig. 4, the clip 3 is a member formed by processing a thin metal plate into a U-shape, and includes a pair of side walls (the first side wall 10 and the second side wall 11) facing each other with a predetermined interval therebetween, and a top wall 12 extending between the first side wall 10 and the second side wall 11. The first side wall 10 is positioned on the side of the stopper 2, and the second side wall 11 is positioned on the side opposite to the stopper 2. A screw hole 13 is provided in the first side wall 10 as a mounting portion for mounting the other end portion 14 of the connecting rod 4. A female screw (second female screw) 13a is engraved on the inner peripheral surface of the screw hole 13. Further, an insertion hole 18 is provided in the second side wall 11 at a position facing the screw hole 13 for inserting the other end portion 14 of the connecting rod 4 with play. Further, a spring-out portion 15 is provided at a predetermined position of the first side wall 10 in the vicinity of the U-shaped opening 3a of the clip 3. This spring-out portion 15 is formed by making a U-shaped cut on the inner surface of the first side wall 10, using the side of the opening 3a of the clip 3 at this cut as a bending portion (fulcrum) 15a, and bending the tip 15b on the side of the top wall 12 at the cut toward the inside of the clip 3 (see Fig. 5).

[0025] As shown in Fig. 4, the connecting rod 4 is a metal round bar, and includes a first male screw portion 16 at one end portion 8 and a second male screw portion 17 at the other end portion 14. A first male screw that is fastened by rotating in the first direction is engraved on the first male screw portion 16. Specifically, a left male screw that is fastened by rotating leftward is engraved on the first male screw portion 16. Further, a second male screw that is fastened by rotating in a second direction opposite to the first direction is engraved on the second male screw portion 17. Specifically, a right male screw that is fastened by rotating rightward is engraved on the second male screw portion 17. Note that a non-screw portion 19 where no screw is engraved is provided between the first male screw portion 16 and the second male screw portion 17.

[0026] In the connecting rod 4, as shown in Fig. 6, let the overall length be L, the diameter be φ, the length of the first male thread portion 16 be α, and the length of the second male thread portion 17 be β. And it is preferable that the length α of the first male thread portion 16 is 7.5% - 10% of the overall length L of the connecting rod 4, and the length β of the second male thread portion 17 is 25% - 27.5% of the overall length L of the connecting rod 4. As one aspect, it is preferable that the overall length L of the connecting rod 4 is 200 mm, the diameter φ is 7.9 mm (0 - 0.3 mm), the length α of the first male thread portion 16 is 15 - 20 mm, and the length β of the second male thread portion 17 is 50 - 55 mm.

[0027] Here, as described above, the stopper 2 is connected to one end portion 8 of the connecting rod 4. Since a left-handed male thread is engraved on the first male thread portion 16 of one end portion 8 of the connecting rod 4, the first female thread 9a of the connecting portion 9 of the stopper 2 is a left-handed female thread to correspond to this. Further, the clip 3 is attached to the other end portion 14 of the connecting rod 4. Since a right-handed male thread is engraved on the second male thread portion 17 of the other end portion 14 of the connecting rod 4, the second female thread 13a of the screw hole 13 of the clip 3 is a right-handed female thread to correspond to this.

[0028] The reinforcing fitting 1 is formed by combining the stopper 2, the clip 3, and the connecting rod 4 as shown in Fig. 4. Specifically, first, the first male thread portion 16 of one end portion 8 of the connecting rod 4 is screwed into the first female thread 9a of the connecting portion 9 of the stopper 2. Since a left-handed male thread is engraved on the first male thread portion 16 and a left-handed female thread is engraved on the connecting portion 9 of the stopper 2, the connecting rod 4 is rotated counterclockwise to fasten the connecting rod 4 to the stopper 2. Next, the second female thread 13a of the screw hole 13 of the clip 3 is screwed into the second male thread portion 17 of the other end portion 14 of the connecting rod 4, and the clip 3 is attached to the other end portion 14 of the connecting rod 4. Since a right-handed male thread is engraved on the second male thread portion 17 of the other end portion 14 of the connecting rod 4 and a right-handed female thread is engraved on the screw hole 13 of the clip 3, the clip 3 is rotated clockwise, adjusted to an appropriate position on the connecting rod 4, and the clip 3 is attached. Thereby, the reinforcing fitting 1 as shown in Fig. 3 is obtained.

[0029] The obtained reinforcing fitting 1 engages with the separator 40. Specifically, as shown in FIG. 5 which is a cross-sectional view taken along the direction of arrow V-V in FIG. 2, when the separator body 41 of the separator 40 is pushed into the opening 3a of the clip 3, the separator body 41 passes through the spring-out portion 15 from the side of its bent portion 15a and is positioned between the connecting rod 4 and the spring-out portion 15, preventing it from coming out of the clip 3. That is, the separator body 41 is clamped by the first side wall 10 and the second side wall 11, and the spring-out portion 15 serves as a stopper for the separator body 41. Thus, the first side wall 10, the second side wall 11, and the spring-out portion 15 cooperate to form a holding portion for holding the separator 40.

[0030] Also, the reinforcing fitting 1 engages with the seismic slit 30. Specifically, as shown in FIG. 2, the stopper 2 is arranged at a predetermined position between the holding frames 32, 32 such that the longitudinal direction of the holding frames 32, 32 of the seismic slit 30 is along the longitudinal direction of the stopper 2. Then, the stopper 2 is rotated in the direction of arrow R. As a result, the peripheral convex portions 6, 7 of the stopper 2 are fitted into the side grooves 35 of the holding frame 32, and the stopper 2 is fixed to the seismic slit 30. In the above manner, the reinforcing fitting 1 connects the seismic slit 30 and the separator 40.

[0031] The reinforcing fitting 1 that connects the seismic slit 30 and the separator 40 is arranged in plurality at a predetermined interval in the vertical direction between the outer formwork 20 and the inner formwork 21 as shown in FIG. 1. In this way, the seismic slit 30 is connected to a plurality of separators 40 by a plurality of reinforcing fittings 1. Thereby, the seismic slit 30 is reinforced against the placing pressure of the concrete.

[0032] Here, after concrete is placed between the outer formwork 20 and the inner formwork 21 with the seismic slit 30 connected to the separator 40 via the reinforcing fitting 1, a vibrator is inserted into the uncured concrete to perform a bubble removal operation for removing bubbles from the interior of the uncured concrete, and an operation of applying vibration is carried out. During this bubble removal operation, there are cases where an operator accidentally contacts the reinforcing fitting 1 or the separator 40 with the vibrator. Then, the connecting rod 4 may rotate due to the vibration of the vibrator. If this rotation is a left rotation in the direction in which a right screw loosens, the screw rod (connecting rod) employed in conventional reinforcing fittings, which has right screws engraved throughout, may come off from the pedestal (stopper). When the screw rod (connecting rod) comes off from the pedestal (stopper), the connection between the seismic slit and the separator is released, and the seismic slit becomes in an unreinforced state, and may be deformed or damaged by directly receiving the pressure of the placed concrete.

[0033] In contrast, for the reinforcing fitting 1 of the present embodiment, a left male screw is engraved on one end portion 8 of the connecting rod 4, and a left female screw is engraved on the connecting portion 9 of the stopper that is screwed with this one end portion 8. Therefore, even if the connecting rod 4 rotates left, which is the direction in which a right screw loosens, due to the vibration of the vibrator, the left male screw tightens, and the connecting rod 4 and the stopper 2 do not separate. For this reason, the connection between the seismic slit 30 and the separator 40 is not released, the seismic slit 30 remains in a reinforced state, and it is prevented from being deformed or damaged by receiving the pressure of the placed concrete.

[0034] Thus, the reinforcing fitting 1 of the present invention is characterized in that the connecting rod 4 included therein has male screws engraved on its one end portion 8 and the other end portion 14 with tightening directions opposite to each other.

[0035] This concludes the description of the embodiments of the present invention. However, the present invention is not limited to these, and various modifications can be made without departing from the spirit of the present invention.

[0036] For example, a left male thread is engraved on one end 8 of the connecting rod 4, a left female thread is engraved on the connecting portion 9 of the stopper 2, a right male thread is engraved on the other end 14 of the connecting rod 4, and a right female thread is engraved on the screw hole 13 of the clip 3. However, the present invention is not limited to this embodiment. It is also possible to engrave a right male thread on one end 8 of the connecting rod 4, a right female thread on the connecting portion 9 of the stopper 2, a left male thread on the other end 14 of the connecting rod 4, and a left female thread on the screw hole 13 of the clip 3.

Explanation of Reference Numerals

[0037] 1 Reinforcing fitting 2 Stopper 3 Clip 4 Connecting rod 8 One end 9 Connecting portion 9a First female thread 13 Screw hole 13a Second female thread 14 Other end 16 First male thread portion 17 Second male thread portion 30 Seismic slit 40 Separator

Claims

1. A reinforcing metal fitting that connects an earthquake-resistant slit and a separator interposed between an outer formwork and an inner formwork into which concrete is poured, and reinforces the earthquake-resistant slit, a stopper that engages with a retaining frame that retains a side portion of the partition wall included in the earthquake-resistant slit, a clip that engages with the separator, and a connecting rod that connects the stopper and the clip, the stopper includes an engagement portion that engages with the holding frame and a connection portion to which one end of the connecting rod is connected, The clip includes an attachment portion that is attached to the other end of the connecting rod in an adjustable manner and a holding portion that holds the separator, The connecting rod includes a first male threaded portion provided at the one end and a second male threaded portion provided at the other end, The first male screw portion is provided with a first male screw that is fastened by rotating in a first direction, The second male screw portion is provided with a second male screw that is fastened by rotating in a second direction opposite to the first direction, A first female thread is formed in the connection portion of the stopper and is adapted to be screwed into the first male thread, The mounting portion of the clip is provided with a second female thread that screws into the second male thread. A reinforcing metal fitting characterized by the above.

2. The first male screw portion is provided with a left-handed male screw that is fastened by rotating in a left direction, The second male screw portion is provided with a right-handed male screw that is fastened by rotating in a right direction, A left-handed female screw is formed in the connection portion of the stopper to screw into the left-handed male screw, The mounting portion of the clip is provided with a right-hand female thread that screws into the right-hand male thread. The reinforcing metal fitting according to claim 1 .

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