JPH0413295Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a new and improved proposal for a planar and mesh-like reinforcing bar unit used as a reinforcing structure in the wall of a building.

As is well known, reinforcing steel structures arranged vertically and horizontally are indispensable for reinforced concrete walls in various buildings, but when constructing walls for large buildings, such as buildings for nuclear power plants, Reinforcement work using large-diameter (D32 to D51) reinforcing bars will be carried out. For reinforcing work using such large-diameter reinforcing bars, it is difficult to secure reinforcing bar workers who are specialized in handling large-diameter reinforcing bars, and the work becomes large-scale, so instead of the traditional reinforcing work at the construction site, Using cranes and other mechanical power, we separately fabricate a reinforcing bar unit in which vertical and horizontal reinforcing bars are arranged as necessary and treated as an integrated structure, and this is transported to the site and erected. In order to promote labor saving and rationalization, the reinforcing bars used for such purposes are those with excellent bonding ability between reinforcing bars, such as threaded reinforcing bars, instead of ordinary round bar reinforcing bars. It is also known to use deformed reinforcing bars.

In the original reinforcing bar unit system, the required number of vertical bars were arranged in parallel at regular intervals on a vertical bar lifting jig that could be handled with a crane, etc., and one end of each vertical bar was placed on the jig side. This is a unit with only vertical reinforcements fixed and held with nuts, etc., and either this vertical reinforcement unit is transported to the site and erected, and the horizontal reinforcements are added later, or a unit with only horizontal reinforcements is manufactured separately, and this horizontal reinforcement unit is attached to the vertical reinforcement unit. In the past, methods such as connecting to a reinforcement unit were used, and it was far from being a complete unit, and a lot of effort and effort was required to connect and integrate the intersections of horizontal and vertical reinforcements. Ru.

Recently, as an alternative unit method, the required horizontal reinforcements are arranged in a lattice shape to the vertical reinforcements arranged and fixed on a vertical reinforcement hanging jig, and the required parts at the intersections are integrated using connecting fittings. As a result, a method has come to be used in which planar and mesh-like reinforcing bar units are pre-assembled in which both vertical and horizontal bars are arranged in a lattice pattern. When connecting and integrating both vertical and horizontal bars in this mesh-shaped reinforcing bar unit, it is necessary to ensure that the shape of the unit is sufficiently maintained during the handling operation and transportation process, and that both the vertical and horizontal bars are firm and do not loosen or come loose. On the other hand, such a unit does not cover the entire wall of the necessary building with a single unit, but uses a large number of units divided according to the shape and size of the wall. It is a common practice to connect groups of units to each other at the construction site, and in order to connect such units, it is necessary to connect the vertical bars and horizontal bars to each other on adjacent surfaces. When using threaded reinforcing bars for both vertical and horizontal reinforcing bars, the reinforcing bars are connected to each other by utilizing the thread shape of the threaded reinforcing bars, as is known.
A joining method using a joint such as a lock nut joint with a lock nut and a coupler is adopted, and when joining this method, movement operations such as axial movement and rotation around the axis of the reinforcing bar are essential. This is especially required for transverse muscles. Therefore, the connecting fitting must ensure such freedom of movement and movement of the reinforcing bars, and it is inappropriate to simply integrate the reinforcing bars at the intersection in a fixed and immovable manner, and a special fitting structure is required. For example, examples of such metal fittings include the reinforcing bar receiving metal fittings disclosed in U.S. Pat. One example of prior art for manufacturing a mesh-like reinforcing bar unit is disclosed in Japanese Patent Application Laid-Open No. 58-20866.

The problem with the prior art related to such mesh-shaped reinforcing bar units is that when such units are installed and connected, the joints of vertical reinforcements to existing reinforcements and the joints of horizontal reinforcements to horizontal reinforcements of adjacent units are At the intersection of the vertical and horizontal muscles, the longitudinal and horizontal muscles interfere with each other, making it extremely difficult to join each other, and special effort and time are required to complete the joining, or it is difficult to achieve complete joining. This significantly hinders complete unitization with the aim of saving labor and increasing efficiency, and it is necessary to develop new countermeasures for this point.

The present invention solves these problems and makes the erection connection extremely easy, by creating a mesh-like reinforcing bar unit with a lattice-like composition of both vertical and horizontal bars using threaded reinforcing bars, with horizontal bars on the vertical bar side. By providing a holding metal that is movable in the axial direction and rotatably held around the axis, it is possible to easily connect the two muscles, facilitate the operation of joining the transverse muscles, and furthermore, it is possible to easily connect the longitudinal muscles that intersect with the joining position of the horizontal muscles. The suspension jig is designed to hold the horizontal reinforcement so that it can move toward and away from the horizontal reinforcement, and its feature is that both the vertical reinforcement and the horizontal reinforcement using threaded reinforcing bars are arranged in a lattice shape. It is a planar and mesh-like reinforcing bar unit in which reinforcement is arranged and the intersections of vertical bars and horizontal bars are connected, and the horizontal bars that intersect with the predetermined longitudinal bars in this unit are movable in the axial direction and can be rotated around the axis. A lifting jig is equipped with a holding hardware that holds the unit movably, one end of each vertical bar is held in a hanging jig, and the hanging jig holds a vertical bar that corresponds to the joining position of each horizontal bar in adjacent units. A long setback hole is provided on the side so that the vertical strip can move toward and away from the horizontal strip in a direction out of the plane of the unit.

The present invention will be described in detail below based on the illustrated embodiment. Figures 1 and 2 show an example of a conventional planar and mesh-like reinforcing bar unit; I will explain briefly.
In the example shown, two mesh-shaped reinforcing bar units C ₁ and C ₂
Each unit is equipped with a lifting jig 1 made of H-beam steel, etc., and the jig 1.
One end is inserted through the insertion holes 1a arranged in a row in, for example, a web etc., and is fixed with a locking nut 4,
It is composed of two groups of vertical bars made of threaded reinforcing bars arranged in parallel at regular intervals, and three groups of horizontal bars made of threaded reinforcing bars arranged in a grid pattern on one side of these vertical bars 2. At this time, the vertical reinforcements 2 and the horizontal reinforcements 3 are connected and integrated at the portions of the two vertical reinforcements 2a, 2a at predetermined positions as shown in the figure.
This is done by connecting and holding each of the transverse strips 3 that intersect with a by a connecting jig 7. Needless to say, these units C are not assembled on site, but are manufactured separately as prefabricated units at a factory, etc., and transported to the construction site, where they are prefabricated at regular intervals as shown in Figure 1. The unit is erected in a suspended manner between the installed pillars 5, 5, and this is carried out by the hanging part 10 attached to the above-mentioned hanging jig 1.
It is constructed using equipment such as cranes. In the erected units C ₁ and C ₂ , each lower end of the vertical reinforcement 2 is connected to a known threaded reinforcing bar, with respect to the connecting embedded reinforcing bar 6 which is arranged in advance in a row between the columns 5 , 5 . The corresponding transverse bars 8, 8 in adjacent units C ₁ and C ₂ are also joined by a joint member 8 such as a threaded coupler joint used for joining.
They are joined by similar joint members 9, and thereby a required wall reinforcement structure can be obtained by connecting and integrating a large number of units C.
In such a conventional unit, as shown by zones A and B in FIG. Since there is no joining part in the horizontal reinforcement 3, there is no risk of mutual interference between the vertical and horizontal reinforcements 2 and 3.However, in the A zone near the frame column 5, the vertical reinforcement 2 and embedded In addition to the joint structure with the reinforcing bars 6, the horizontal bars 8 in adjacent units C ₁ and C ₂ ,
8 mutual bonding structures coexist in an intertwined manner. At this time, the vertical bars 2 and the horizontal bars 3 are in contact with each other in an intersecting manner by means of a connecting fitting 7, and the vertical bars 2 are fixed and suspended by a locking nut 4 inserted through the insertion hole 1a of the hanging jig 1. Because they are held together, there is no room between the two reinforcements 2 and 3, and in the case of a screw coupler joint, for example, the joint members 8 and 9 are connected to a coupler with a thread cut on the inside and located at both ends of the coupler. Like two lock nuts that are fitted to reinforcing bars, members are used that are fitted onto both the vertical and horizontal reinforcements 2 and 3, so the vertical and horizontal reinforcements will interfere with each other at this intersection. The joining operation is extremely difficult, and even if the joining positions are shifted, there is a limit to this, which is a major problem with mesh-shaped reinforcing bars, and when large diameter reinforcing bars are used, this difficulty becomes even more difficult. increase

The present invention proposes a reinforcing bar unit as shown in the embodiments shown in FIGS. In FIGS. 3 to 7, reference numeral 1 denotes a hanging jig according to the present invention, and the jig 1 has a substantially H-shaped cross-sectional shape, and both lengthwise ends are larger than the central portion. These are the wide portions 1', 1'. In other words, as shown in FIG. 3, A where the joints of the horizontal bars 3 and the joints of the vertical bars 2 intersect in the mesh-like unit.
The part corresponding to the zone is the wide part 1', and when fixing one end of the vertical reinforcement 2 using the web of the jig 1, the central part, which is only the joint part of the vertical reinforcement 2, is the wide part 1'. In the part corresponding to zone B in FIG. 3, the insertion holes 1a are arranged in a row as in the conventional case, and one end of the vertical bar 2 is fixed and held by a locking nut 4, whereas the wide parts 1', 1 As shown in Fig. 4, long setback holes 1b, 1b are arranged in a row in the width direction of the wide part 1', and one end of the vertical reinforcement 2 arranged in this part is inserted into the long hole 1b. It is fixed and held by adjusting it to move forward and backward along the elongated hole 1b via a locking nut 4. Therefore, in this wide part 1', the vertical reinforcements 2 are arranged in the width direction of the wide part 1', that is, in the out-of-plane direction of the reinforcing bar unit, as shown in FIG. It can be moved towards and away from the camera. For the lifting jig 1 having the insertion hole 1a and the setback long hole 1b as described above, two groups of vertical bars are fixed and held by respective locking nuts 4, and three groups of horizontal bars are arranged in a grid on the upper surface of these vertical bars 2. In order to connect and integrate the intersection parts of the two reinforcements 2 and 3 by arranging the reinforcements in a shape, in this invention, the transverse reinforcement 3
A holding metal fitting 11 is used which can move freely in the axial direction and hold the metal piece rotatably around its axis.
Examples of this will be described in FIGS. 8 to 13. That is, the holding hardware 11 shown in FIGS. 8, 9, and 10
Forms a generally semi-cylindrical trunk main body 15 that is fitted around at least half of the partial outer circumference of the longitudinal strip 2 at the intersection, and extends from the upper end of the trunk main body 15 at the intersection. A substantially U-shaped locking plate 16 is integrally formed to protrude toward the upper surface of the outer circumference of the transverse reinforcement 3, and a substantially U-shaped support protrudes from the lower end of the trunk main body 15 toward the lower surface of the outer circumference of the transverse reinforcement 3. A plate 17 is also integrally formed in a protruding manner. At this time, the upper locking plate 16 is
The length of the lower support plate 1 is so short that it slightly reaches the upper surface of the outer periphery of the lower support plate 1.
7 supports the lower surface of the outer periphery of the transverse reinforcement 3 and has a length such that it crosses the transverse reinforcement 3 and still projects forward. At each end of the U-shaped leg portion of the locking plate 16, insertion holes 19, 19 are provided, into which one end of a lock bar 18 (described later) is removably inserted. At each end of the U-shaped leg portion of the
8 is rotatably and vertically movably supported. One end of each lock bar 18 is a hook portion 20 that is inserted into the insertion hole 19, and the other end is loosely inserted into an insertion hole 21 provided in the support plate 17 for horizontal rotation and vertical movement. Loose insertion protruding end and plate 1
Since the spring 22 is elastically supported between the two ends, the other end is always biased to be pulled downward. A stopper 26 is formed in a part of the lock bar 18, and the L-shaped bent portion of the lock bar 18 is formed into an arc-shaped bent portion 23 as shown in the figure.

In this embodiment, since the inner surface of the body main body 15 is a smooth surface and circumscribes the outer peripheral surface of the longitudinal strip 2, the ninth,
A hardware locking nut 24 as illustrated in FIG. 10 is used auxiliary. This locking nut 24 is a split nut, and the split pieces are connected to each other by bolts, as is known in the art.
Connection part 2 that can be assembled and disassembled with nuts or screws, etc.
5 and are screwed together using screws formed on the circumferential surface of the vertical reinforcement 2, so that it is located on the lower surface of the lower supporting plate 17 and receives the entire hardware. .

The embodiment shown in FIGS. 11, 12, and 13 is
The hardware fixing nut 24 in the embodiment shown in FIGS. 10 to 10 is not required, and the hardware 11 itself is fixed without falling from the vertical strip 2 side. This purpose can be easily achieved by forming a threaded surface that can be screwed into the thread of the vertical reinforcement 2 on the inner peripheral surface of the semi-cylindrical shape.

According to the above-mentioned holding hardware 11, in the two vertical stripes 2a, 2a belonging to the B zone shown in FIG. 3, the horizontal stripes 3 intersecting these can be joined and integrated in the following manner. That is, as shown by the dotted line in FIG.
Both the locking plate 16 and the support plate 17, which are fitted from the lower side of a and protrude from both ends of the body main body 15, are made to protrude on both sides of the intersection of the upper transverse reinforcements 3, and The lock bars 18, 18, which are in the open position at the tip of the plate 17, are rotated toward the locking plate 16, and at this time, the bar 18 is slightly pulled against the spring 22, and the hook portion 20 at one end is locked. By locking in the insertion hole 19 of the plate 16 in a depressed manner, the intersecting portion of the horizontal strips 3 is locked by the lock bars 18, 18 in a holding manner, and the intersection of the longitudinal and transverse strips 2, 3 is locked. The parts can be joined together in a one-touch manner, and are tightly joined by the tension of the spring 22. After that, in the embodiments shown in FIGS. 8 to 10, on the outside of the support plate 17, a metal fastening nut 24 for fixing is screwed and tightened on the side of the vertical reinforcement 2a using the two halves. By this, the joining operation is completed, and FIGS. 11 to 13
In the illustrated embodiment, the main body 15 is fixed by screwing into the threaded portion of the vertical reinforcement 2a.

In this way, with the lifting jig 1 placed horizontally, the vertical bars 2 are attached and fixed to the jig, and the 3 groups of horizontal bars are arranged in a grid pattern on the fixed 2 groups of vertical bars, and the specified By connecting the horizontal reinforcements 3 on the vertical reinforcements 2a, 2a through the holding metal fittings 11, it is easy to prefabricate the mesh-like reinforcing bar unit C, and in this case, the horizontal reinforcements 3 are connected to the upper surface of the support plate 17. Since it is clamped and fixed to the lock bars 18, 18, together with the elasticity provided by the spring support of the lock bars 18, 18, it is possible to freely move in the axial direction and rotate around the axis. However, the structure of the holding hardware 11 is not limited to that of the embodiment, and any structure that can hold the horizontal reinforcement 3 so as to be movable in the axial direction and rotatable around the axis will have the same effect. The reinforcing bar unit C of the present invention, which was separately manufactured in this way, is
As shown in Fig. 3, units C ₁ and C ₂ will be erected between the pillars 5 and 5 in order, and for the unit C ₁ that was erected first, the B zone will be the first to be erected. The lower end of each longitudinal bar 2 is joined to a connecting embedded reinforcing bar (using threaded reinforcing bar) 6 by a joint member 12, respectively. This joint member 12 can be freely adopted as long as it is a known joint member for connecting threaded reinforcing bars, but for example, it may be a threaded coupler 13 made up of one threaded coupler 13 and two lock nuts 14 as shown in FIG. A coupler fitting can be used. That is, the lock nut 14 and the screw coupler 13 are fitted in advance on the side of the embedded reinforcing bar 6, and the lock nut 14 is fitted on the side of the vertical bar 2, and the locking nut 4 of the vertical bar 2 is loosened. First, rotate or lower the vertical bar 2 to match the screw pitch, then screw the screw coupler 13 onto the lower end of the vertical bar 2 to a predetermined position, and tighten the upper and lower lock nuts 14. Therefore, the joining can be easily performed. Next, all the horizontal reinforcements 3 in unit C ₁ are joined to the horizontal reinforcements 3 in the existing unit C, which has already been erected, in zone A on the left side in FIG.
is retreated along the long hole 1b for setback in the wide portion 1', as shown in FIG. After the vertical stripes 2 in the A zone are separated from the horizontal strips 3 in the same zone in this way, the horizontal strips 3 and 3 are joined in the same manner using a screw coupler 13 and a lock nut 14 as illustrated in FIG. 14. It turns out. In this case, the structure of the hardware 11 allows the horizontal reinforcements 3 to move freely in the axial direction and also to rotate around the axis, so their joining is extremely easy, and together with the retraction of the vertical reinforcements 2, it is smooth. Processed quickly. After the horizontal reinforcements 3, 3 in the A zone have been joined in this manner, the retracted vertical reinforcements 2 in the A zone are moved forward along the setback long holes 1b, and then joined to the embedded reinforcing bars 6. Therefore, the connection between the vertical bars 2 and the reinforcing bars 6 can also be achieved very easily. Below is the new reinforcing bar unit C ₂
is installed between the next frame columns 5 and 5, and the same joining operation is repeated.

According to the mesh-shaped reinforcing bar unit C of the present invention,
Regarding the connection between the units, which was the biggest problem with conventional mesh-shaped reinforcing bar units,
In zone A, where the joints between the longitudinal reinforcements 2 and the embedded reinforcing bars 6 and the joints between the horizontal reinforcements 3 and 3 between adjacent units C and C intersect, each joint is A major advantage arises in that it can easily solve problems that were difficult to solve. That is, when fixing and holding the vertical bars 2 to the lifting jig 1, a wide part 1' is provided in the jig 1, and a long setback length is provided here in the width direction of the wide part 1', that is, in the out-of-plane direction of the reinforcing bar unit. Hole 1
By fixing and holding the vertical strips 2 that form the A zone and belong to the A zone so that they can move forward and backward, a space is created between the A zones where the vertical strips 2 and the horizontal strips 3 do not interfere with each other. can be created, so this A
The joining operations on the 2nd side of the vertical reinforcement and the 3rd side of the horizontal reinforcement in the zone are extremely facilitated, and this allows mesh-like reinforcing bars units composed of a complete grid to be continuously erected and connected. The work of interconnecting them to obtain the desired wall reinforcement structure is extremely efficient, requires no skill, and can be easily performed by any person. For example, for a project that requires a minimum of 10 professional reinforcement workers under conventional construction methods, using the reinforcing bar unit of this invention requires only 2 to 3 reinforcement workers, reducing the number of project team members and reducing labor costs. Costs can be reduced significantly, and work time can be further shortened. In this case, as a connecting and holding hardware at the intersection of the vertical reinforcement 2 and the horizontal reinforcement 3, the holding hardware 1, which is particularly capable of moving the horizontal reinforcement 3 in the axial direction and freely rotating around the axis, as shown in the embodiment, is used.
By using 1, 100% freedom is obtained for the transverse reinforcement 3, which requires a large degree of freedom when joining, and the joining operation is significantly improved, making it easier to improve workability and shorten the construction period. This is possible. With conventional mesh-shaped reinforcing bar units, even if they are completely prefabricated, it is difficult to perform joint operations in the zone where the horizontal reinforcement joints and longitudinal reinforcement joints intersect, and the advantages of unitization cannot be fully demonstrated. According to the unit of the present invention, this problem has been solved, and in particular, the reinforcement work for walls of large buildings using large-diameter reinforcing bars can be significantly streamlined. This is an excellent reinforcing bar unit.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional mesh-shaped reinforcing bar unit in the erected state, Fig. 2 is a plan view of the same lifting jig, Fig. 3 is a front view of the erected state with the reinforcing bar unit of the present invention, and Fig. 4 is a plan view of the same lifting jig, FIG. 5 is a front view of the main parts of the same unit, FIG. 6 is a plan view of the same, FIG. 7 is a side view of the same, and FIGS. 8 to 10.
The figure is a three-sided view of the embodiment of the holding hardware, FIGS. 11 to 13 are three-sided views of a modified embodiment of the holding hardware, and FIG.
The figure is an explanatory diagram of a screw coupler joint. 1...Hoisting jig, 1'...Wide part, 1a...
...Through hole, 1b...Elongated hole for setback, 2...
Vertical reinforcement, 3... Horizontal reinforcement, 4... Locking nut, 5... Framing column for construction, 6... Embedded reinforcing bar for connection, 11...
Holding hardware, 12... Joint member, 13... Screw coupler, 14... Lock nut, 15... Body main body, 16... Locking plate, 17... Supporting plate, 18... Lock bar.

Claims (1)

[Scope of utility model registration request] It is a planar and mesh-like reinforcing bar unit in which both longitudinal and transverse bars using threaded reinforcing bars are arranged in a lattice pattern, and the intersections of the longitudinal bars and transverse bars are connected. is equipped with a holding hardware that holds the intersecting horizontal bars movable in the axial direction and rotatable around the axis, and one end of each vertical bar is held in a hanging jig, and the mutual connection between adjacent units is On the side of the hanging jig that holds the vertical reinforcement corresponding to the joining position of the horizontal reinforcement, there is a long setback hole extending in the same direction so that the vertical reinforcement can be freely moved toward and away from the horizontal reinforcement in the out-of-plane direction of the unit. A reinforcing bar unit for building walls, which is characterized by being provided with.