Reinforcement holding tool

Abstract

To provide a reinforcement holding tool which can enhance workability of a welding work in crossing reinforcements.SOLUTION: A reinforcement holding part 100 maintains a reinforcement A in a state of being pressed against a reinforcement B downward from above and being intersected with each other. The reinforcement holding part 100 includes: a body part 200 having a connection part 220, a pair of leg parts 230 which extend in a lower direction while securing a space wider than a diameter of the reinforcement A by being divided into two from the connection part 220, and a support part 235 which is provided on the lower ends of each of the leg parts 230 and supports the reinforcement B from below; pressing means 340; and a movable part 330 having a rod part 310 which is installed in the connection part 220 in a state in which pressing force is added to the lower direction by the pressing means 340, and is moved upward by resisting pressing force.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a reinforcing bar retainer, and more particularly, to a reinforcing bar retainer for maintaining the intersecting state of a pair of intersecting reinforcing bars.

Background Art

[0002] Conventionally, a method has been used in which a plurality of reinforcing bars are intersected and welded or the like to improve the strength of the reinforcing bars joined in a lattice shape. When welding the reinforcing bars, it is necessary to bring the intersecting reinforcing bars into close contact (contact). For this reason, the welding operation is performed in a state where the reinforcing bars are manually brought into close contact with each other, or the welding operation is performed in a state where the reinforcing bars are preliminarily tied together using a binding wire.

[0003] Recently, a reinforcing bar retainer for maintaining the close contact state of intersecting reinforcing bars has been proposed (see, for example, Patent Documents 1 and 2). By using such a reinforcing bar retainer, it is possible to maintain the intersecting reinforcing bars in a state of being in close contact with each other.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the reinforcing bar retainers described in Patent Documents 1 and 2 have insufficient holding strength for bringing the reinforcing bars into close contact with each other, and there is a risk that the close contact state may become unstable.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a reinforcing bar retainer capable of reliably maintaining the intersecting state of the reinforcing bars.

Means for Solving the Problem

[0007] The reinforcing bar retainer according to the present invention is a reinforcing bar retainer that maintains a state in which one reinforcing bar is pressed against another reinforcing bar from above and crossed, and includes a connecting portion, and a pair of legs that extend downward while securing a space wider than the diameter of one reinforcing bar by splitting into two branches from the connecting portion, and a support portion provided at the lower end of each leg for supporting the other reinforcing bar from below. The main body portion having the above, a pressing means, and a movable portion having a rod portion that is installed on the connecting portion in a state where a downward pressing force is applied by the pressing means and moves upward by resisting the pressing force. The other reinforcing bars are arranged so as to be laid over each support portion, and in a state where one reinforcing bar is arranged in the space so as to cross the other reinforcing bar, the rod portion presses one reinforcing bar downward by the pressing force of the pressing means, and the one reinforcing bar pushed by the rod portion maintains a state of being pressed against the other reinforcing bar.

Advantages of the Invention

[0008] According to the reinforcing bar retainer of the present invention, the crossed state of the reinforcing bars can be reliably maintained.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0010] Hereinafter, an example of the reinforcing bar retainer according to the present invention will be shown and described in detail with reference to the drawings.

[0011] FIG. 1 is a perspective view showing the reinforcing bar retainer 100, FIG. 2(a) is a front view, and FIG. 2(b) is a side view. In the following description, "upper", "lower", "right", "left", "front", and "rear" follow the definitions in FIG. 1.

[0012] The reinforcing bar retainer 100 is a jig used to maintain (hold) the reinforcing bars in an intersecting state so that the reinforcing bars do not shift when welding two intersecting reinforcing bars or arranging a plurality of reinforcing bars in a lattice pattern. The reinforcing bar retainer 100 is mainly formed by a main body portion 200 and a movable portion 300 that is attached (installed) to the main body portion 200 so as to be vertically movable.

[0013] The main body portion 200 is integrally formed with a plate-shaped portion 210 formed in an inverted U shape in a front view and a ceilinged cylindrical portion 260 having a hollow space inside. The plate-shaped portion 210 has a pair of leg portions 230, 230 and a connecting portion 220 that connects the upper portions of the respective leg portions 230, 230.

[0014] The leg portions 230, 230 extend downward so as to be bifurcated from the connecting portion 220, and a space S1 is secured between the leg portions 230, 230. The width of the space S1 in the left-right direction is defined to be wider than the diameter of the reinforcing bar A (upper reinforcing bar, one reinforcing bar) arranged so as to penetrate the space S1 in the front-rear direction, as shown in FIGS. 1 and 2(a).

[0015] At the lower ends of the respective leg portions 230, 230, lower reinforcing bar holding portions (support portions) 235, 235 for holding (supporting from below) the reinforcing bars B (lower reinforcing bars, other reinforcing bars) arranged in the left - right direction are formed. As shown in Fig. 2(b), the lower reinforcing bar holding portions 235, 235 are formed by bending the tips of the leg portions 230, 230 so as to be V - shaped in a side view. By arranging the reinforcing bar B so as to span the lower reinforcing bar holding portions 235, 235 formed on the respective leg portions 230, 230, the reinforcing bar B can be held horizontally.

[0016] A part of the circumferential surface of the cylindrical portion 260 located at the rear is formed with a flat notch. The cylindrical portion 260 is connected to the plate - like portion 210 in a state where this flat - notched portion (flat portion) is in contact with the flat portion (front side wall) of the connecting portion 220 in the plate - like portion 210. The hollow space of the cylindrical portion 260 has a cylindrical shape and moves the rod portion 310 of the movable portion 300 up and down. As shown in Fig. 2(b), the cylindrical portion 260 has an internal space with an inner diameter capable of receiving the rod portion 310 and the coil spring 340 installed on the rod portion 310. On the other hand, the diameter of the opening 265 formed in the ceiling surface 261 of the cylindrical portion 260 is such that only the rod portion 310 can pass through, and it has a size (inner diameter) that allows the rod portion 310 to rotate about the rod axis. For this reason, the coil spring 340 is arranged on the rod portion 310 with its upper end abutting against the ceiling surface 261 of the cylindrical portion 260.

[0017] The movable portion 300 has a substantially cylindrical rod portion 310 formed with a spring receiving surface 315 at the lower end, a rectangular flat - plate - shaped plate 320 attached to the spring receiving surface 315, and an eye bolt 330 attached to the upper end of the rod portion 310.

[0018] The eyebolt 330 is integrally formed by a gripping portion 332 which is an annular portion, a pedestal portion 334 which is the base of the annular portion, and a threaded portion 336 extending downward from the pedestal portion 334. In the eyebolt 330, the gripping portion 332, the pedestal portion 334, and the threaded portion 336 are vertically arranged so that their central axes are coaxial, and by rotating the gripping portion 332, the threaded portion 336 can be smoothly rotated.

[0019] A threaded hole 317 for attaching the threaded portion 336 of the eyebolt 330 is formed at the upper end portion (upper end face) of the rod portion 310.

[0020] The plate 320 is horizontally attached to the lower surface of the spring receiving surface 315 so that its longitudinal direction is along the front-rear direction of the space S1 (the front-back direction of the plate-like portion 210). The plate 320 has two holes 322, 322 penetrating vertically on its upper surface (see Fig. 3(a)). Bolts 325, 325 are passed through these holes 322, 322, and these bolts 325, 325 detachably attach an upper reinforcing bar holding portion (pressing portion) 350, which will be described later, to the plate 320.

[0021] A coil spring (pressing means) 340 is arranged on the upper surface side of the spring receiving surface 315 of the rod portion 310. The coil spring 340 has a structure in which an upper coil spring 342 and a lower coil spring 344 with different spring constants are connected. In a general coil spring, the wire diameter changes according to the spring constant, and the compression length also changes. In the reinforcing bar holder 100 of the present embodiment, considering the length from the connecting portion 220 to the leg portions 230, 230, the vertical movement distance of the rod portion 31, the wire diameter of the reinforcing bar, etc., by connecting two types of coil springs 340 (the upper coil spring 342 and the lower coil spring 344), the wire diameter and spring constant of the coil spring 340 are adjusted so as to be comprehensively optimized.

[0022] When the movable part 300 is attached to the main body part 200 so as to be vertically movable, a coil spring 340 is arranged with respect to a rod part 310 to which a plate 320 is attached, and the upper end part of the rod part 310 on which the coil spring 340 is arranged is guided upward from below the cylindrical part 260 through an opening 265 formed in the ceiling surface 261 of the cylindrical part 260. Then, by screwing the screw part 336 of the eye bolt 330 into the screw hole (screw hole formed at the upper end part) 317 of the rod part 310 guided above the ceiling surface 261 of the cylindrical part 260, the upper end part of the rod part 310 is connected to the eye bolt 330. The movable part 300 obtains a pressing force by the elastic force of the coil spring 340 installed on the rod part 310, and is maintained in a state of pressing the plate 320 downward with respect to the cylindrical part 260 of the main body part 200. Further, when the rod part 310 is pulled upward so as to resist the pressing force of the coil spring 340, the movable part 300 moves upward.

[0023] As described above, the upper reinforcing bar holding part 350 can be attached to the lower surface of the plate 320. FIG. 3(a) is a schematic view for explaining a state of attaching a steel upper reinforcing bar holding part 351 to the plate 320, and (b) is a perspective view showing a copper upper reinforcing bar holding part 356.

[0024] As shown in FIG. 3(a), the steel upper reinforcing bar holding part 351 has two flat plate parts 352 having substantially the same size as the plate 320, and an inverted V-shaped plate 353. The inverted V-shaped plate 353 is formed by bending in an inverted V shape at the central part in the short side direction, and is connected to the central part of the flat plate part 352 located above it at the upper end part (ridge part). The upper reinforcing bar holding part 351 brings the peripheral surface (upper peripheral surface) of the upper part of the reinforcing bar A located below the upper reinforcing bar holding part 351 into contact (line contact) at two places on the lower surface of the inverted V-shaped plate 353, and guides it into the recess of the inverted V shape, and holds the reinforcing bar A with the upper reinforcing bar holding part 351.

[0025] In the upper reinforcing bar holding part 351 (flat plate part 352 and inverted V-shaped plate 353), screw holes 354, 354 are formed so as to correspond to the positions of the holes 322, 322 of the plate 320. As shown in Fig. 3(a), the upper surface of the flat plate part 352 of the upper reinforcing bar holding part 351 is brought into contact with the lower surface of the plate 320, and bolts 325, 325 are screwed into the screw holes 354, 354 of the upper reinforcing bar holding part 351 through the holes 322, 322 of the plate 320, whereby the upper reinforcing bar holding part 351 can be detachably attached to the plate 320.

[0026] Moreover, the upper reinforcing bar holding part 350 used for the reinforcing bar fixture 100 is not limited to the steel upper reinforcing bar holding part 351 shown in Fig. 3(a), and a copper upper reinforcing bar holding part 356 as shown in Fig. 3(b) can be used.

[0027] The copper upper reinforcing bar holding part 356 has a shape in which a quadrangular prism having substantially the same surface as the lower surface of the plate 320 is laid horizontally, and the lower surface is cut in the front-rear direction so as to have an inverted M-shaped cross section in a front view. For this reason, the lower surface of the upper reinforcing bar holding part 356 is cut in an inverted V shape, and the peripheral surface (upper peripheral surface) of the upper part of the reinforcing bar A is brought into contact (line contact) at two places on the lower surface of the upper reinforcing bar holding part 356 and introduced into the concave part of the inverted V shape, and the reinforcing bar A is held by the upper reinforcing bar holding part 356.

[0028] Also, screw holes 357, 357 are formed in the upper reinforcing bar holding part 356 so as to correspond to the positions of the holes 322, 322 of the plate 320. Similar to the upper reinforcing bar holding part 351, the upper surface of the upper reinforcing bar holding part 356 is brought into contact with the lower surface of the plate 320, and bolts 325, 325 are tightened into the screw holes 357, 357 of the upper reinforcing bar holding part 356 through the holes 322, 322 of the plate 320, whereby the upper reinforcing bar holding part 356 can be detachably attached to the plate 320.

[0029] Next, the operation of the reinforcing bar fixture 100 will be described. As already described, the reinforcing bar retainer 100 is used to maintain the intersecting state of the reinforcing bars so that the reinforcing bars do not shift when welding two intersecting reinforcing bars or the like. Further, the reinforcing bar retainer 100 is used to appropriately maintain the posture when arranging a plurality of reinforcing bars in a lattice shape so as to have a plurality of intersecting portions. The reinforcing bar retainer 100 can be attached to reinforcing bars arranged in various states, such as reinforcing bars arranged on a horizontal plane, reinforcing bars arranged on a vertical plane, or reinforcing bars arranged on other planes.

[0030] When attaching the reinforcing bar retainer 100 to the intersecting reinforcing bars A and B, as shown in FIGS. 4(a) and 4(b), with the operator pulling up the movable part 300 upward with respect to the main body part 200 via the eyebolt 330, the lower reinforcing bar holding parts 235, 235 (hereinafter simply referred to as the lower reinforcing bar holding part 235) are positioned directly below the lower reinforcing bar B, and the upper reinforcing bar holding parts 351, 356 (hereinafter simply referred to as the upper reinforcing bar holding part 350) attached to the plate 320 are positioned directly above the upper reinforcing bar A. Then, the reinforcing bar retainer 100 is arranged with respect to the intersecting reinforcing bars A and B.

[0031] In this state, when the operator gradually lowers the movable part 300, as shown in FIGS. 5(a) and 5(b), the lower surface (the lower surface bent in an inverted V shape) of the upper reinforcing bar holding part 350 is brought into contact with the upper surface of the reinforcing bar A. Also, the upper surface (the upper surface bent in a V shape) of the lower reinforcing bar holding part 235 is brought into contact with the lower surface of the reinforcing bar B. Then, due to the elastic force (pressing force) of the coil spring 340, the upper reinforcing bar holding part 350 presses the reinforcing bar A, and further, the reinforcing bar A presses the reinforcing bar B supported by the lower reinforcing bar holding part 235 from below, so that a closely attached intersecting state is maintained at the intersecting portion of the reinforcing bar A and the reinforcing bar B.

[0032] Also, as another attachment procedure for the reinforcing bar fixture 100, while the operator holds the reinforcing bar fixture 100 with the eye bolt 330, the lower surface of the upper reinforcing bar holding portion 350 is pressed against the reinforcing bar A. At this time, in order to prevent the lower reinforcing bar holding portion 235 from interfering with the reinforcing bar B, the upper reinforcing bar holding portion 350 is pressed while tilting the reinforcing bar fixture 100 so that the rod axis is not orthogonal to the reinforcing bars A and B, or as shown in FIGS. In the position shifted backward of the reinforcing bar B, the upper reinforcing bar holding portion 350 is pressed. Due to the force applied by the operator to press the reinforcing bar A downward through the upper reinforcing bar holding portion 350, the coil spring 340 is compressed, the main body portion 200 moves downward with respect to the movable portion 300, and the lower reinforcing bar holding portion 235 is positioned below the reinforcing bar B. In this state, by tilting or sliding the reinforcing bar fixture 100, the upper surface of the lower reinforcing bar holding portion 235 is moved directly below the reinforcing bar B. When the operator gradually relaxes the force pressing the upper reinforcing bar holding portion 350 against the reinforcing bar A, the elastic force of the coil spring 340 causes the main body portion 200 to move upward with respect to the movable portion 300, and the lower reinforcing bar holding portion 235 comes into contact with the lower surface of the reinforcing bar B. As a result, as shown in FIGS. 5(a) and 5(b), at the intersection of the reinforcing bar A and the reinforcing bar B, the reinforcing bars A and B held in the vertical direction by the upper reinforcing bar holding portion 350 and the lower reinforcing bar holding portion 235 maintain a closely crossed state.

[0033] In this other attachment procedure, compared with the aforementioned method, the operator can pull up the movable portion 300 with respect to the main body portion 200 by the reaction force of the operation of pressing the upper reinforcing bar holding portion 350 against the reinforcing bar A, rather than pulling up the movable portion 300 with respect to the main body portion 200. Therefore, the work of attaching the reinforcing bar fixture 100 can be made easier. Further, since a series of attachment operations can be completed while holding the eye bolt 330 of the reinforcing bar fixture 100 with one hand, it can be said that this is an excellent method also in that the other hand can be used for other operations such as holding one of the reinforcing bars.

[0034] As yet another mounting procedure, while lifting the movable part 300 with respect to the main body part 200 via the eye bolt 330, only one of the lower reinforcing bar holders 235 is hooked onto the reinforcing bar B. In this state, while rotating the reinforcing bar fixture 100 about one of the lower reinforcing bar holders 235 as an axis, the other lower reinforcing bar holder 235 is hooked onto the reinforcing bar B. Thereafter, when the operator releases his or her hand from the eye bolt 330, the reinforcing bars A and B held in the vertical direction by the upper reinforcing bar holder 350 and the lower reinforcing bar holder 235 due to the elastic force of the coil spring 340 maintain a closely contacting crossed state.

[0035] The three mounting procedures described as examples can be appropriately selected according to the interval between the reinforcing bars and the space where the operator can work.

[0036] The reinforcing bars to which the reinforcing bar fixture 100 is attached by such a mounting procedure can surely maintain a closely contacting state at the crossing portion of the reinforcing bars A and B. At this time, a space S1 is provided around the crossing portion, and a sufficient left - right interval (space distance) is ensured. Further, with respect to the vertical dimension of the space S1, a sufficient height dimension (space distance) is ensured in consideration of the vertical movement of the rod part 310. That is, due to the existence of the space S1, a sufficient space is ensured around the crossing portion of the reinforcing bar A and the reinforcing bar B.

[0037] Specifically, a sufficient distance is ensured from the crossing portion of the reinforcing bars A and B to the leg part 230 (lower reinforcing bar holder 235) and the cylindrical part 260. Therefore, when holding the crossing portion of the reinforcing bars A and B with the reinforcing bar fixture 100 and performing welding of the reinforcing bars A and B, it becomes easy to ensure a sufficient space for inserting the welding tool around the welding site, and the working efficiency of the welding operation can be improved. In particular, even when performing the welding operation by a robot or the like, since a sufficient space can be ensured around the welding site, it becomes possible to smoothly perform the welding operation by a robot or the like, and it becomes easy to ensure the rapidity and accuracy in the welding operation.

[0038] Also, when a large number of reinforcing bars are arranged in a lattice pattern or in a three-dimensional (curved) shape, the lattice-shaped reinforcing bars can be maintained in an appropriate posture by holding only the required intersection points with the reinforcing bar holder 100 without fixing all the intersection points with the reinforcing bar holder 100.

[0039] Specifically, when the reinforcing bar holder 100 is attached to the intersection of the reinforcing bar A and the reinforcing bar B and the intersecting state of the reinforcing bar A and the reinforcing bar B is maintained, the postures of the reinforcing bars A and B are also maintained in the length direction. This is because the reinforcing bar holder 100 supports the reinforcing bar B at two locations from below with the lower reinforcing bar holding portion 235 and further supports the reinforcing bar A from above with the upper reinforcing bar holding portion 350. Therefore, the reinforcing bars A and B are stably fixed in an appropriate posture by the support at three locations. For this reason, for example, as shown in FIG. 1, the reinforcing bar C disposed on the reinforcing bar B can also closely adhere to the reinforcing bar B due to its own weight on the stably disposed reinforcing bar B.

[0040] Therefore, by fixing the intersection of the reinforcing bar A and the reinforcing bar B with the reinforcing bar holder 100, a suitable close contact state can also be realized for the intersection of the reinforcing bar B and the reinforcing bar C, and the intersection of the reinforcing bar B and the reinforcing bar C can be welded in this state. That is, the reinforcing bar holder 100 can not only directly realize the close contact state of the intersection to be welded, but also be used for indirect fixing to make the adjacent intersections in close contact.

[0041] For example, at a location having a curved shape where it is difficult to directly attach the reinforcing bar holder 100, by attaching the reinforcing bar holder 100 to an adjacent intersection where it is easy to attach the reinforcing bar holder 100, it can also function as a tool for temporary support in the process of assembling the reinforcing bars.

[0042] In such a reinforcing bar fixture 100 in the present embodiment, with a simple operation, the intersecting state of the reinforcing bars can be surely maintained. That is, the reinforcing bar fixture 100 can bring the intersecting portion of the reinforcing bars A and B into close contact by utilizing the elastic force of the coil spring 340 at three locations on the reinforcing bars only through the operations of pulling up the movable portion 300 against the elastic force of the coil spring 340, arranging (hooking) the pair of lower reinforcing bar holding portions 235 on the reinforcing bar B, and arranging (pressing) the upper reinforcing bar holding portion 350 on the reinforcing bar A.

[0043] Moreover, the reinforcing bar fixture 100 in the present embodiment also has the following advantages.

[0044] Since the upper reinforcing bar holding portion 350 is attached to the plate 320 provided at the lower end of the rod portion 310, even during or after the attachment to the reinforcing bar, by rotating the rod portion 310, the intersection angle of the reinforcing bar A with respect to the reinforcing bar B can be adjusted while maintaining the horizontal state of the plate 320 and the upper reinforcing bar holding portion 350. Conversely, even when the intersection angle of the reinforcing bar A with respect to the reinforcing bar B is not 90 degrees, since the rod portion 310 can be rotated according to the intersection angle, the reinforcing bar A can be surely held by the upper reinforcing bar holding portion 350.

[0045] Furthermore, since the lower surface of the upper reinforcing bar holding portion 350 is inclined so as to have an inverted V-shaped cross section, it can be surely held by line contact at two locations on the upper circumferential surface of the reinforcing bar A in the recess of the lower surface having the inverted V-shaped cross section, and the upper reinforcing bar holding portion 350 is not easily displaced with respect to the reinforcing bar A. Similarly, since the upper surface of the lower reinforcing bar holding portion 235 is bent so as to have a V-shaped cross section, it can be surely held by line contact at two locations on the lower circumferential surface of the reinforcing bar B due to the recess of the upper surface having the V-shaped cross section, and the lower reinforcing bar holding portion 235 is not easily displaced with respect to the reinforcing bar B.

[0046] In addition, since the upper reinforcing bar holding portion 350 has an inverted V-shaped cross-section and the lower reinforcing bar holding portion 235 has a V-shaped cross-section, the reinforcing bar holder 100 can be attached regardless of the size (diameter) of the reinforcing bars held by them as long as the size allows for line contact at two points in these V-shaped portions. Also, regarding the space S1 between the lower reinforcing bar holding portions 235, for example, by arbitrarily setting the spring constant of the coil spring 340, the amount of upward pull of the movable portion 300 with respect to the main body portion 200 can also be arbitrarily set. Therefore, since the reinforcing bar holder 100 can be applied to reinforcing bars having various sizes, it is not necessary to prepare a reinforcing bar holder 100 for each size of the reinforcing bar.

[0047] Also, the elastic force of the coil spring 340 is utilized as a pressing force to maintain the intersecting state of the reinforcing bars A and B. For this reason, it is not necessary to firmly clamp and fix the reinforcing bars A and B with a clamping jig or the like that supports the intersection at two points. Also, compared to the case of clamping and fixing with a clamping jig or the like, simply by pulling up the eye bolt 330, the space (the space between the upper reinforcing bar holding portion 350 and the lower reinforcing bar holding portion 235) for introducing the reinforcing bars A and B can be widened. Also, after introducing the reinforcing bars A and B into this space, by using the elastic force of the coil spring 340 to lower the eye bolt 330 (rod portion 310) downward, the reinforcing bars A and B are held by the upper reinforcing bar holding portion 350 and the lower reinforcing bar holding portion 235, and the state where the reinforcing bar A is pressed against the reinforcing bar B can be maintained by the elastic force of the coil spring 340. Therefore, the attaching and detaching operation of the reinforcing bar holder 100 becomes easier than that of conventional clamping jigs or the like, and the convenience in the attaching and detaching operation of the reinforcing bar holder 100 can be improved.

[0048] Also, when performing the welding operation of reinforcing bars A and B to which the reinforcing bar fixture 100 is attached, metal pieces (spatter scattering) scattered by the welding operation may adhere to the surroundings, and there is a risk that the reinforcing bar A and the upper reinforcing bar holding portion 351 may be welded together. In this case, a copper upper reinforcing bar holding portion 350 like the upper reinforcing bar holding portion 356 is attached to the plate 320 and the welding operation is performed. Since copper is a metal with excellent thermal conductivity, even if the temperature of the reinforcing bars A and B rises, the temperature of the copper upper reinforcing bar holding portion 356 itself is less likely to rise, and it becomes difficult for the upper reinforcing bar holding portion 356 to be welded to the reinforcing bar A. That is, the upper reinforcing bar holding portion 356 is not welded to the reinforcing bar A by the welding operation of the reinforcing bars A and B, and as a result, it is possible to prevent the reinforcing bar fixture 100 from being welded to the reinforcing bar A.

[0049] Furthermore, the upper reinforcing bar holding portion 350 is detachably attached to the plate 320. Therefore, even if the upper reinforcing bar holding portion 351 is welded to the reinforcing bar A when using the steel upper reinforcing bar holding portion 351, the upper reinforcing bar holding portion 351 can be removed from the plate 320. Therefore, it is possible to prevent the reinforcing bar fixture 100 from becoming non-removable from the reinforcing bar A (being fixed to the reinforcing bar A) due to the upper reinforcing bar holding portion 351 being welded to the reinforcing bar A. Furthermore, since the steel upper reinforcing bar holding portion 351 is less expensive than the copper upper reinforcing bar holding portion 356, it is possible to reduce the cost of the upper reinforcing bar holding portion 350.

[0050] Also, as already described, since the rod portion 310 is structured to rotate with respect to the cylindrical portion 260, the angle of the upper reinforcing bar holding portion 350 can be flexibly adjusted according to the arrangement state of the reinforcing bar A. On the other hand, since the longitudinal end portions of the plate 320 and the upper reinforcing bar holding portion 350 are positioned so as to be exposed in front of and behind the main body portion 200, even if the rod portion 310 is rotated, the edges of the plate 320 and the upper reinforcing bar holding portion 350 will hit the inner portions of the legs 230, 230 in the main body portion 200. Therefore, even when the rod portion 310 is rotated, it is possible to suppress the angles of the plate 320 and the upper reinforcing bar holding portion 350 within an appropriate range (a range narrower than 360 degrees).

[0051] As described above, the reinforcing bar retainer according to the present invention has been described in detail with reference to the drawings. However, the reinforcing bar retainer according to the present invention is not limited to that shown in the embodiment. For example, in the reinforcing bar retainer 100 shown in the embodiment, as shown in FIGS. 1, 4 to 6, the case where the reinforcing bars A and B are straight has been described. However, in the reinforcing bar retainer according to the present invention, the reinforcing bars A and B are not necessarily limited to being in a straight state, and even if they are bent, the intersection portion between the reinforcing bar A and the reinforcing bar B can be appropriately held.

[0052] For example, even when the lower reinforcing bar B is bent in a U shape or a V shape when viewed from the front, the bent reinforcing bar B can be bridged over the lower reinforcing bar holding portion 235. When the bridged reinforcing bar intersects the reinforcing bar A at an intermediate position between the two lower reinforcing bar holding portions 235, the rod portion 310 can be lowered to the intersection portion between the reinforcing bar A and the reinforcing bar B. In this case, since the upper reinforcing bar holding portion 350 can push the reinforcing bar A downward and press it against the reinforcing bar B, it is possible to maintain the intersection portion between the reinforcing bar A and the reinforcing bar B.

[0053] In addition, in the reinforcing bar retainer 100 of the present embodiment, the configuration in which the upper reinforcing bar holding portion 350 is detachably attached below the plate 320 and the upper reinforcing bar holding portion 350 pushes the reinforcing bar A downward has been described. However, in the welding operation between the reinforcing bar A and the reinforcing bar B, when the possibility of the reinforcing bar A being welded to the plate 320 is low, the upper reinforcing bar holding portion 350 may not be attached to the plate 320, and the plate 320 may directly push down the reinforcing bar A.

[0054] Also, in the reinforcing bar retainer 100, the structure in which a spring receiving surface 315 is formed at the lower end of the rod portion 310 and a coil spring 340 is installed above this spring receiving surface 315 was described. However, the installation structure of the coil spring 340 is not limited to only being arranged above the spring receiving surface 315. For example, without providing the spring receiving surface 315 on the rod portion 310, a plate 320 may be attached to the lower end of the rod portion 310, and the plate 320 may be used as the spring receiving surface. Also, when the plate 320 is not a flat surface, a washer member or the like as the spring receiving surface may be arranged on the upper surface of the plate 320.

Explanation of Reference Numerals

[0055] 100 … Reinforcing bar retainer 200 … Main body portion 210 … Plate-like portion 220 … Connecting portion 230 … Leg portion 235 … Lower reinforcing bar holding portion (support portion) 260 … Cylindrical portion 261 … Ceiling surface 265 … Opening 300 … Movable portion 310 … Rod portion 315 … Spring receiving surface 317 … Threaded hole 320 … Plate 322 … Hole 325 … Bolt 330 … Eye bolt 332 … Gripping portion 334 … Pedestal portion 336 … Threaded portion 340 … Coil spring (pressing means) 342 … Upper coil spring 344 … Lower coil spring 350, 351, 356 … Upper reinforcing bar holding portion (contact portion) 352 … Flat plate portion 353 … Inverted V-shaped plate 354, 357 … Threaded holes S1 … Space

Claims

1. A reinforcing bar retainer for maintaining a state in which one reinforcing bar is pressed against another reinforcing bar from above and held in a crossed state, a main body portion having a connecting portion, a pair of leg portions extending downward while securing a space wider than the diameter of the one reinforcing bar by splitting into two branches from the connecting portion, and support portions provided at lower end portions of the respective leg portions for supporting the other reinforcing bar from below; a movable portion having pressing means for generating a pressing force, and a rod portion installed at the connecting portion in a state where a downward pressing force is applied by the pressing means and moving upward by resisting the pressing force; comprising: in a state where the other reinforcing bar is arranged to span over the respective support portions and the one reinforcing bar is arranged in the space so as to cross the other reinforcing bar, the rod portion presses the one reinforcing bar downward by the pressing force of the pressing means, and the one reinforcing bar pressed by the rod portion maintains a state of being pressed against the other reinforcing bar. A reinforcing bar retainer.

2. The reinforcing bar retainer according to claim 1, wherein a pressing portion that is pressed against an upper peripheral surface of the one reinforcing bar is detachably provided at a lower end of the rod portion.

3. The reinforcing bar retainer according to claim 2, wherein a recess for guiding the upper peripheral surface of the one reinforcing bar is formed in the pressing portion.

4. The reinforcing bar retainer according to claim 2, wherein the pressing portion is made of copper.

5. The reinforcing bar retainer according to any one of claims 1 to 4, wherein the rod portion is provided at the connecting portion in a rotatable state about a rod axis of the rod portion.

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