JP5077855B1 - A method of mounting the cross-joining metal fitting and the cross-joining metal fitting. - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a cross-joint fitting method for attaching a cross-joint bracket for assembling a reinforcing bar without welding.
SOLUTION: An inner fastening cross joint metal body having a latch part, a pair of inner fastening cross support parts, and a pair of tightening screw parts continuously formed, an inner fastening cross joint metal fitting having a mounting washer and a nut. Alternatively, the reinforcing frames are cross-joined to assemble the rebar rods without welding, and the latching part is locked to the upper vertical main bar around the crossing part, and the lower vertical main bar is connected via the fastening screw part and the mounting washer A method of attaching the cross-jointed metal fittings to be screwed, a method of attaching the mounting washer by bending it in the range of about 6 degrees to about 9 degrees to the left and right around the longitudinal main bars, and an external tightening when cross joining A method of attaching the front of the cross support part by deforming from a substantially L shape to a substantially U shape and screwing and fastening, and an outer fastening cross joint metal fitting formed in a substantially L shape corresponding to the width of the longitudinal main bar when cross joining, The inner frame intersects with the width of the reinforcing frame or hoop line. Cross-jointed metal fitting that forms a support.
[Selection] Figure 1

Description

  The present invention relates to a method for attaching a cross-joining metal fitting for cross-joining a main bar of a reinforcing bar to be assembled without welding used in a cast-in-place concrete pile, a hoop bar and a reinforcing frame, and the cross-joining metal fitting.

  Conventionally, assembling of reinforcing bar rods consists of a combination of a plurality of longitudinal main bars arranged in a columnar shape and an annular or rectangular hoop bar in a lattice shape, and a cylindrical or prismatic reinforcing bar rod is formed by cross-connecting metal fittings and binding wires and welding. In general, the assembly is horizontally assembled using an assembly jig or the like near the erection.

  The main bars of rebar rods used for earthquake-resistant foundations are usually horizontally assembled in a columnar or prismatic shape with thick main bars in a horizontally long state, and the assembled rebar rods are lifted by a crane and are vertically upright Suspended and placed in a cast-in-place concrete pile in a vertical state, but when the fishing support is lifted, the high weight of the thick main bar causes deformation of the rebar rod, causing deformation such as torsion. Reinforcing frames are used to prevent digging deformation when installed.

  Also, when assembling the reinforcing bar rods in a columnar shape, combine the main bars inside with the hoop bars in each lattice form on the outside, and reinforce the frame appropriately changing the inside and outside of the main bars, and combine the lattice-like intersections. Bundling and assembling with cross-joint fittings and binding wires such as orthogonal clamps and U-bolts, and the rebar rods are assembled side by side near the ground. Needs to be performed from within the column-shaped reinforcing bar rod, and therefore when using cross-joint fittings, many use cross-joint fittings for inner tightening.

  A commercially available cross-joint fitting such as an orthogonal clamp has a U-bolt shape or a U shape, one end having a substantially U-shaped portion or a U shape, and a tip of the other end having a screw portion. It is formed by bending or bending in an upright manner from both sides to form a substantially U-shaped side surface or a substantially U-shaped side surface, and to cross-join the intersecting portions of the longitudinal main bars and the reinforcing frame or the hoop muscles, The usage is according to each manufacturer's recommended mounting method and usage such as nut tightening force.

  Therefore, the "rebar tying tool" of the patent document disclosed as the prior art, when binding both rebars where the main bar and the hoop bar of the rebar rod cross at right angles to each other, the binding wire and the number wire are not used. The other hoop is crossed perpendicularly to one of the main reinforcing bars of both reinforcing bars, and the two reinforcing bars are locked by the curved portion and the fixing member. There is a “reinforcing bar binding tool” showing an embodiment in which both reinforcing bars that intersect perpendicularly to each other are bound together by a central portion that is in contact. (For example, see Patent Document 1)

  In addition, the “rebar bundling bracket” disclosed in the patent document disclosed as another prior art is a method for firmly and easily bundling a main bar and a hoop and a main bar and a reinforcing steel material by using welding for assembling a reinforcing bar cage. And a main muscle gripping portion 6a formed in a U-shape along the outer periphery of the main muscle 1 and a U-shape along the outer periphery of the reinforcing steel material 3 installed inside the main muscle 1 so as to intersect the main muscle 1 A metal fitting body 6 composed of the formed reinforcing steel material gripping portion 6b, a fastening washer 7 and a fastening nut 8 which are attached to the metal fitting body 6 and sandwich the main bar 1 and the reinforcing steel material 3 by the metal fitting body 6. There is a “rebar binding metal fitting” showing an embodiment configured by a hoop muscle gripping portion 9 that is attached to the fastening washer 7 and grips the hoop muscle 2 that is installed outside the main muscle 1 and intersects with the main muscle 1. . (For example, see Patent Document 2)

JP 2003-184223 A JP 2007-92435 A

  The current rebar rod assembly is done by combining the longitudinal main bars inside with the reinforcing frame and hoop bars in the form of a grid on the outside, and joining the crossing points at the crossing points with crossing clamps such as cross clamps and binding wires. In recent years, however, it has been demanded to assemble without welding using only cross-connecting brackets and binding wires, but reinforcement of the lifting side of the reinforcing bar For cross joints of reinforcing bars, cross welded metal fittings that are not welded are used, but welding is also used for cross joints of reinforcing bars in other locations. Corresponding to each combination using metal fittings and welding, no welding has been achieved.

The necessity of non-welding depends on the welding environment such as humidity and temperature during welding, and the welding quality depends on the proficiency level of the welding technique, and there are many problems such as instability of the welding. Therefore, there is a concern that the welding will be lost and the welding will be dislodged and the reinforcing bar will collapse, and from such a current situation, there has been a demand for an assembly without welding in the field by using a cross-jointed metal fitting.
The on-site complete non-welding is referred to in the industry as welding performed at a construction site where a reinforcing bar is assembled, and excludes welding that forms a hoop bar or the like in a facility managed at a factory or the like.

  However, there is still the need to use this welding together because of the high cost of using cross-jointed metal fittings and the labor and complexity of installation work. Therefore, the present application and the applicant conducted the assembly of the reinforcing bar rod by using the cross-jointed metal fittings without welding in the field, but when lifting the reinforcing rod rod, the bending of the reinforcing rod rod, Due to the deformation caused by twisting, the engaging portions of the cross-joining metal fittings are deformed and returned to their original state due to rubbing, and when excessive rubbing occurs, the tightening screw portions of the cross-joining metal fittings are torn, leading to collapse.

  And the collapse is not known from the fact that it has not been performed without welding conventionally, it is an assembly that uses welding together, and the welding prevents deformation due to bending and twisting of the reinforcing bar rod, Since the deformation is not directly applied, no friction occurs, and therefore, the tightening screw portion does not tear and collapse, and as a result, it was not assembled without welding. It did not lead to collapse when waking up, and it was not known in the welded structure that it collapsed due to deformation when hung up.

  Therefore, the deformation caused by bending and twisting when the reinforcing bar is suspended is lifted by the crane and lifted vertically in the standing state, and particularly when the vertical bar is lifted in the standing state, the weight is greatly increased. When the reinforcing bar is used for seismic foundations, the vertical main bars are thicker and more heavy than usual, and in particular, deformation is caused by large addition, which leads to rubbing of each cross-jointed metal fitting.

  In addition, the rubbing occurs in the cross-joint fitting that cross-joins the upper reinforcing frame or hoop bar that hangs the rebar rod vertically, and depending on the size of the rubbing, the tightening screw portion of the cross-joint fitting It was confirmed that it broke, and the response was clarified as an issue.

  Therefore, as a result of considering the cause and tendency of rubbing due to deformation such as torsion described above, the present applicant has found that the cross-joint mounting state when the vertical main bar and the reinforcing frame or hoop bar are cross-bonded, that is, the vertical main bar and the reinforcement. It has been found that the resistance to rubbing greatly depends on the mounting direction of the frame or hoop bar and the cross-joint fitting, the tightening strength of the tightening screw, the deformation rate of the mounting washer, and the like.

  However, conventional cross-joint fittings are installed in accordance with the recommended mounting method and nut tightening force recommended by each manufacturer, and as a method of attaching the cross-joint fittings to be cross-joined, the screw tightening of the nuts is strengthened. It is recommended that the mounting washer be deformed in a large curve, or on the contrary, a thick plate thickness is proposed and pressed strongly without deformation. As a result of conducting an experiment by welding, it was confirmed that the non-welded structure was a measure that was not suitable for the actual solution of the problem, and the problem was not yet solved.

  In view of the above, the present applicant analyzed the difference in the mounting strength and the degree of deformation of the reinforcing bar rod with respect to the tightening force by the nut and the mounting direction of the cross-joining metal fitting on the fastening screw portion of the cross-joining metal fitting, Even with cross-jointed metal fittings, there are more differences depending on the mounting method, and there are many problems mentioned above, so the cross-joint that attaches the vertical main bar, the reinforcing frame, and the hoop bar at the crossing point We found a solution to the problem by changing the mounting direction of the bracket, the mounting width of the reinforcing frame or hoop bar and the cross-joint bracket to be joined.

  As a result, it was recognized that the conventional cross-joint mounting state was the cause of this, and the cross-connecting bracket was greatly rubbed depending on the mounting state, leading to the rupture of the tightening screw part. The present application and the applicant have newly found out and have solved them by the present invention.

  In addition, the “rebar tying tool” and “rebar tying tool” disclosed in Patent Documents 1 and 2 disclosed as the prior art described above are also used in the above-described conventional prior art. There are almost the same problems as the above, and the problem is that when the rebar rod assembled without welding is hung, the fastening screw part of the cross-joint metal fitting is broken due to deformation such as rubbing, and the current situation does not greatly deform the rebar rod Although it was partly welded structure and assembly was performed with partly welded structure without knowing the collapse due to deformation when hanging, there was a great demand for non-weld as described above.

  In order to facilitate the understanding of the contents described in detail in this application, it is described as follows for the sake of convenience. That is, the above-described longitudinal main bar and the reinforcing frame or the hoop bar are crossed by a cross-joint fitting. With respect to the force applied to the cross-joined metal fitting to be joined, the force applied is the deformation force such as fishing support force and torsion acting when lifting the rebar rod with a crane or the like, and the weight of the rebar rod, and the cross-joint thereof. Specifically, the direction of the force applied to each member is determined by the force acting on the reinforcement frame or hoop muscle when the reinforcement frame or hoop muscle is directly lifted or hung, and the reinforcement frame or hoop of each member. The force directly applied to the muscle is the upward force in the direction of the fishing line that is lifted directly, while the longitudinal main muscle is the downward force due to the weight itself due to the weight of the reaction, which will be described later. Is the force applied to the reinforcing frame or hoop as "upward force", the vertical main reinforcement is "downward force".

  Further, in the description of the direction of the deformation force due to the bending and twisting of the reinforcing bar in relation to the above-mentioned force, in the present application description, for the sake of convenience, the reinforcing frame and the hoop crossing with respect to the “vertical” vertical main reinforcing bar. The line is the “horizontal direction”, and the direction of the force applied to the cross joint fitting is “upward” and “downward” with the reinforcing frame crossing the vertical main bar and the hoop line at the center. Similarly, the mounting position relationship between the U-shaped support portion and the pair of tightening screw portions formed on the joining metal fitting is defined as “upper side” and “lower side” with reference to the intersection.

  Furthermore, with respect to the tightening amount of the pair of tightening screw portions of the cross-joining metal fitting and the deformation amount of the mounting washer due to the tightening, the main bar is pressed and supported by the nut through the mounting washer so as to straddle the main bar, and the mounting is performed by screw tightening. The washer is bent and deformed, the mounting washer is tightened from a flat state of 180 degrees, and the amount of bending deformation is about 6 degrees to the left and right is the “minimum value”, and about 9 degrees to the left and right The curvature value of the main muscle is defined as the “maximum value”, the “minimum value” is the minimum value at which the main muscle can be fastened and fixed, and the “maximum value” is the value at which the main bar press-holding force is maximized. The values of 6 degrees and 9 degrees are the upper and lower values, and there is some variation depending on the surface condition of the main muscle, and the value that is an apparent guideline is deformed so that the tightening screw part opens in a substantially reverse C shape. It is also a value to be It is a numerical measure of the neighborhood that do not Shimese.

  That is, the deformation of the mounting washer in a substantially inverted C shape is the maximum pressing force of the main muscle, and the tightening exceeding the maximum bending angle further increases the substantially inverted C-shaped deformation, The tightening screw part is excessively tightened leading to tearing, and is in a range that can be balanced before reaching the maximum holding force and tearing due to deformation. The value of the angle at which the mounting washer bends and the “substantially reverse C-shaped deformation” is the appropriate tightening force. And

  In addition, in the positional relationship of “inner tightening” and “outer tightening” of the inner fastening cross joint fitting and the outer fastening cross joint fitting described in the present application, the longitudinal main bar and the reinforcing frame or hoop bar are cross joined. When the cross-connecting bracket latching portion and the tightening screw portion are locked and screwed on the reinforcing frame or hoop muscle side, or on the vertical main muscle side is the difference between locking and screwing tightening, In the description of the present application, what is latched and screwed and tightened on the longitudinal main muscle side is referred to as “inner tightening”, and what is hooked and screwed and tightened on the reinforcing frame or hoop muscle side is referred to as “outer tightening”.

In order to achieve the above-mentioned object effectively, the present invention provides as a first solution means a rebar which is assembled without welding by cross-joining the intersecting portion where the longitudinal main bar and the reinforcing frame or the hoop are orthogonal with an inner fastening cross-joint fitting. A method of attaching an inner fastening cross-joint fitting for cross-joining a collar, wherein the inner fastening cross-joint fitting is bent or curved in an upright manner with a latching portion having a substantially U-shaped plane and fastening screw portions at both ends thereof. A pair of inner tightening cross support portions, an inner tightening cross joint metal body in which the latching portion, the pair of inner tightening cross support portions, and a pair of tightening screw portions are formed continuously, a mounting washer, and a nut in constructed, crossed joining reinforcing frame or hoop of a pair of inner clamping cross support section with locking the該掛stop portion on the upper side of the longitudinal main reinforcement around the intersection difference portion, the lower side of the intersection The pair of tightening screw parts are arranged so as to sandwich the vertical main bar The upper side of the crossing portion that crosses joined by screwing fastening by pressing and supporting the nuts said longitudinal main reinforcement through Rutotomoni mounting washer, and the lifting side to cause hanging upright reinforcing bars cage vertically, above the said cross-section the mounting method each disposed a pair of fastening screw portion in the longitudinal main reinforcement of the lower side near together to lock the upper predicate hooking portion on the side near the longitudinal main reinforcement which fishing支力acts to lift it,
The force that supports fishing when the reinforcing bar rod is suspended acts on the latching portion of the inner fastening cross-joint fitting, and does not act directly on the pair of fastening screw portions.

As a second solution, the mounting washer when screwed and tightened to the pair of tightening screw portions with a nut through the mounting washer is about 6 to 9 degrees from side to side about the longitudinal main bar. By the mounting method of screwing and tightening to the extent of bending,
It is supposed that the supporting force for pressing and supporting the reinforcing frame, the hoop muscle, or the longitudinal main bar via the mounting washer is optimally supported by the pair of fastening screw portions of the inner fastening cross-joint fitting.

In addition, as a third solution, an inner fastening cross-joint fitting for cross-joining rebar rods that are assembled without welding by cross-joining the intersecting portion where the longitudinal main bars and the reinforcing frame or the hoop bars are orthogonally joined by the outer fastening cross-joint fitting The outer fastening cross-jointed metal fitting has a side surface formed by bending a hook portion having a substantially U-shaped or substantially U-shaped flat surface and a pair of tightening screw portions on both end sides in an upright manner. An outer fastening cross joint metal body formed in a substantially U shape and deformed into a substantially lateral shape with a slightly opened side surface, and formed as a pair of outer fastening cross support portions, a mounting washer, The nut is configured so that the latching portion is locked to the reinforcing frame or hoop muscle near the left or right side from the center of the intersection, and the vertical main reinforcement is supported by a pair of outer tightening intersection support portions. The reinforcing frame or hoop via a mounting washer on the side Are supported by an externally tightened cross joint fitting body that is cross-joined by pressing support and screw tightening with a nut, and the pair of externally tightened cross support parts are deformed from a pair of tightening screw parts from a substantially rectangular shape to a substantially U-shaped side surface. Then, the reinforcing frame or the hoop muscle is pressed and supported via a mounting washer, and the mounting method is screwed and tightened with a nut.
The force that supports fishing when the reinforcing bar rod is hung up acts on the hooking portion of the outer fastening cross-joint fitting, and does not act directly on the pair of fastening screw portions.

Further, as a fourth solving means, there is an internal fastening cross-joint fitting for cross-joining reinforcing bar rods that are assembled by cross-joining the crossing portions where the vertical main bars and the reinforcing frame or the hoop bars cross each other without welding. The joint fitting is a pair of inner fastening cross-supports whose side faces are substantially U-shaped or substantially U-shaped by bending or bending the latching part having a substantially U-shaped plane and the fastening screw parts at both ends thereof in an upright manner. Forming a hook portion, a pair of inner tightening cross support portions and an inner tightening cross joint metal fitting body formed by connecting a pair of tightening screw portions, a mounting washer, and a nut. And the reinforcing frame or the hoop muscle intersect with each other. Place and install the pair of tightening screw parts so that The longitudinal main bars are cross-joined by press support and screw fastening with nuts through a washer. The inner fastening cross-joint metal body has a substantially U-shaped side width. With the inner fastening cross-joint bracket formed near the same width,
The force that supports fishing when the reinforcing bar rod is suspended acts on the latching portion of the inner fastening cross-joint fitting, and does not act directly on the pair of fastening screw portions.

Further, as a fifth solving means, there is provided an outer fastening cross joint metal fitting for cross joining of reinforcing bar rods which is constructed by cross joining the vertical main bars and the reinforcing frame or the hoop bars at a crossing position without welding. The joining bracket has a substantially U-shaped or U-shaped hooking portion and a pair of tightening screw portions on both end sides curved in an upright manner to form a side surface in a substantially U shape. A substantially U-shaped side surface that is slightly opened to be deformed into a substantially rectangular shape and formed as a pair of externally tightened cross joint support bodies formed continuously as a pair of externally tightened cross support portions, a mounting washer, and a nut. The retaining frame is locked to a reinforcing frame or hoop bar near the left or right side of the center of the frame, and the vertical main bar is supported by a pair of outer fastening cross support parts, and the reinforcement is provided via a mounting washer on the other side. Frame or hoop muscles are pressed and tightened with nuts The pair of externally tightened cross support portions that are mounted so that each of the latching portion and the pair of tightening screw portions stand up and sandwich on both sides of the longitudinal main bar when the joints are joined with each other. When the shape is deformed from a substantially rectangular shape to a substantially U-shape, the outer cross is formed in advance so that the side surface corresponding to the width of the longitudinal main bar is substantially the same shape as the width of the longitudinal main bar. By joining metal fittings,
The force that supports fishing when the reinforcing bar rod is hung up acts on the hooking portion of the outer fastening cross-joint fitting, and does not act directly on the pair of fastening screw portions.

According to the present invention, an effective effect can be obtained by each of the above-described means. In particular, an annular hoop muscle is arranged at a predetermined interval on the outside of the plurality of longitudinal main bars arranged in a cylindrical shape of the first solution means. in reinforcing frame a long plate formed in an annular shape with arranged in a grid also a predetermined number in a predetermined position, and each disposed substantially Similarly, no welding respective intersections least reinforcing frame perpendicular to each longitudinal main reinforcement The inner fastening cross-joint fitting for cross-joining the reinforcing bar rods to be assembled in the inner fastening cross-joint fitting is a commercially available U-bolt shape with a substantially U-shaped hooking portion and the both ends. Each of the pair of tightening screw portions is bent or curved in an upright manner so as to correspond to the plate width or diameter width of the reinforcing frame or hoop muscle, and a pair of inner tightenings whose side faces are substantially U-shaped or substantially U-shaped. Formed as a cross-supporting portion, the latching portion and a pair of The fastening cross support portion, the inner fastening cross joint metal fitting body in which a pair of tightening screw portions are continuously formed, a mounting washer having an insertion hole through which the pair of tightening screw portions are inserted, and a nut, above the longitudinal main reinforcement that said longitudinal main reinforcement and the reinforcement frame or hoop is centered on the crossing portion crossing, supporting a reinforcing frame or hoop of a pair of inner clamping cross support part with engaging the該掛locking portion are allowed, then the said longitudinal main reinforcement of the lower side of the intersection, and pressing and supporting the said longitudinal main reinforcement through the mounting washer to the pair of fastening screw part as well as arranged so as to sandwich at the pair of fastening screws portion erecting let intersect joined by screwing fastening by the nut, the engaging portion above the clamping cross-connecting bracket main body, in the mounting position relationship in the upper and lower pair of clamping screw portion,
The the lifting side to cause hanging upright reinforcing bars cage vertically, with the upper side of the intersection, the longitudinal main reinforcement of the side near to a upper side lifting fishing支力acts to lock the該掛stop portion Due to the mounting method of the inner fastening cross joint brackets in which a pair of tightening screw parts are arranged on the vertical main bars in the vicinity of the lower side, due to the fishing support force when lifting the assembled rebar rod with a crane and lifting it vertically upright, The bending and torsional force of the reinforcing bar is generated, and the force acts on each inner fastening cross-joint fitting to cause rubbing on each inner fastening cross-joining fitting to be cross-joined. The U-shaped latching portion having a strong locking force is locked to the vertical main bar in the vicinity of the upper side from the center where the vertical main bar and the reinforcing frame or the hoop bar cross-join. Is directly on the substantially U-shaped hook. The substantially U-shaped part of the latching part is supported by being locked to the vertical main bar, and is supported by a pair of tightening screw parts that are screwed and supported by the vertical main bar near the lower side. Since the upward force is not directly applied, the tightening screw part is not torn, and therefore it does not lead to the collapse of the reinforcing bar rod, so that it was possible to obtain a mounting method that can assemble the reinforcing rod rod without welding. .

  That is, the pair of tightening screw portions easily breaks due to stress concentration in the screw portion. Therefore, the pair of tightening screw portions has a relatively breaking force compared to the substantially U-shaped hooking portion. The tightening screw is placed at a position that is weak and does not directly apply the fishing support force. Even if bending of the rebar rod or twisting force occurs, the inner tightening crossing is applied so that the U-shaped hook is applied at the center. By disposing the joining metal fitting, it does not lead to the collapse of the reinforcing bar rod, and therefore the reinforcing rod rod can be assembled without welding by the mounting method.

  In addition, since it has not been done without welding in the past, it is not known that it will collapse in the past, and as a result, it collapses when the rebar rod is hung up in the conventional assembly without welding. Therefore, according to the present invention, according to the present invention, we confirmed the possibility of collapsing without welding and the completion of the solution.

Accordingly, when the second solution is screwed and tightened with a nut through a mounting washer to a pair of tightening screw portions of the inner fastening cross joint metal fitting, each of the mounting washers has about 6 each on the left and right sides of the vertical main bars. By the mounting method of screwing and tightening to the extent that it is curved in the range of about 9 degrees to about 9 degrees,
By tightening the screw, the mounting washer is curved and comes into contact with the outer periphery of the longitudinal main bar in an arc shape, and the “minimum value” of the curved deformation is about 6 degrees which is the minimum value for fastening and fixing the longitudinal main bar. In addition, the “maximum value” of the bending deformation is also a value that deforms so that the tightening screw portion opens in a substantially reverse C shape at about 9 degrees at which the pressing force of the longitudinal main muscle is maximized, If this value is less than that, the cross-joint is loosened due to insufficient tightening. With the attachment method that allows the longitudinal main bars and the reinforcing frame or the hoop bars to be cross-joined, it is possible to prevent the vertical main bars from falling off even without welding.

Thus, the reinforcing frame in which the annular hoop bars are arranged in a grid pattern at predetermined intervals on the outside of the plurality of longitudinal main bars arranged in a cylinder and the long plate is formed in an annular shape is also in a predetermined position. A predetermined number, each of which is arranged in substantially the same manner, and at least the reinforcing frame is attached to each crossing portion orthogonal to each longitudinal main bar. The outer fastening cross-joint fitting has a substantially U-shaped or substantially U-shaped plane, has a pair of tightening screw portions at both ends, and the plane hooks the U-shaped or substantially U-shaped portion. Each of the hook portion and the pair of tightening screw portions are bent upright, and the side surface corresponding to the diameter width of the longitudinal main bar is substantially U-shaped, and the substantially U-shape is slightly A substantially rectangular shape formed by opening is formed as a pair of outer fastening cross support portions, and the latching portion and a pair of outer fastenings An outer fastening cross-joint metal body formed by connecting a cross support portion and a pair of tightening screw portions; a mounting washer having an insertion hole through which the pair of tightening screw portions are inserted; and a nut, the longitudinal main bar and a reinforcing frame or hoop of left or right one side near the reinforcing frame or hoop is centered on the crossing portion crossing, a pair of outer clamping the said longitudinal main reinforcement intersecting with engaging the該掛locking portion The pair of fastening screw parts standing up are arranged so as to be supported by the cross support part and sandwich the reinforcing frame or hoop bar in the vicinity of the other side, and the reinforcing frame or hoop bar is pressed and supported by a nut through a mounting washer. In the cross-joining of the screw tightening, the side surfaces of the pair of outer tightening cross-supporting portions are mounted in the substantially rectangular shape,
After the latching portion is locked to the longitudinal main bars of the intersecting portion and supported by the pair of outer tightening cross support portions, the side surfaces of the pair of outer tightening cross support portions are substantially U-shaped. By attaching to cross-join by deforming into a letter shape,
When the assembled rebar rod is lifted by a crane and lifted vertically in a standing state, the reed rod rod is bent and twisted, and the force acts on each outer fastening cross joint fitting. When subjected to the action, each outer fastening cross-joint fitting to be cross-joined is rubbed and thereby loosened. By deforming from the tightening screw portion so as to have a width substantially the same as the diameter width of the longitudinal main bars, the loosening can be prevented and falling off of the intersecting vertical main bars can be prevented.

  When it is cross-joined, first, for example, the latching portion is locked to the left reinforcing frame or hoop muscle, and it is attached beyond the longitudinal main reinforcement at the center intersecting from the tip of the pair of tightening screw portions. When the mounted state is screwed and tightened through the mounting washer while the substantially cruciform shape is maintained, the opening width of the substantially cruciform shape is screwed to the latching portion and the pair of tightening screw portions. And the width of the deformable region, that is, the width derived from the substantially U shape, respectively, The difference from the width derived from the re-shape is formed as the distance that the mounting washer can move. Therefore, by deforming the deformable region of the approximate re-shape into a substantially U-shape, the same as the longitudinal main reinforcement. Eliminating the deformable area of the width, and from this, the above U shape By form by screwing a pair of outer clamping cross support section, it does not cause loosening from the deformable region.

  In other words, when the deformable region is bent and the twisting force is applied to the reinforcing bar rod, the pair of tightening screw portions are deformed by the amount of the deformable region and the mounting washer is loosened and moved. The pressing support force of the outer fastening cross joint metal fitting is loosened, but the side surfaces of the pair of outer fastening cross support portions are deformed from the substantially rectangular shape to a substantially U shape, By making the width between the pair of tightening screw parts the same as the width of the longitudinal main bar, the deformable region is eliminated, and even if the reinforcing bar is bent or twisted, the pair of tightening screw parts are not deformed, Therefore, loosening does not occur in the externally tightened cross joint fitting, and it is possible to prevent the longitudinal main bars from falling off even without welding.

  This is because the above-mentioned “upward force” acts on the latching part or the bent part of the pair of cross support parts when the reinforcement frame or the hoop muscle is affected by the deformation. If there is a deformable area in the bent part of the part, it will be deformed by that amount, and conversely if there is no deformable area, it will be directly added to the longitudinal main muscle and its latching part and deformed into the bent part The outer fastening cross-jointed metal fittings that are to be cross-joined are supported without rubbing, so that the reinforcing rods are collapsed by the attachment method in which they are deformed from their substantially rectangular shape to a substantially U-shape and cross-joined. It was possible to assemble without welding.

  In addition, about the necessity for the side surface of a pair of external fastening cross support part to be the said substantially rectangular shape, first, the plane is substantially U-shaped or substantially U-shaped on one side of the reinforcing frame or hoop muscle that intersects with the longitudinal main reinforcement. After the latching portions are locked, the vertical main bars are supported by a pair of external tightening cross support portions beyond the vertical main bars intersecting from the ends of the pair of tightening screw portions, and the latches locked at that time And the pair of tightening screw portions at a distance that exceeds the longitudinal main bar, the distance in a state of being slightly opened in the substantially rectangular shape is large, so that it can be supported beyond the vertical main bar. If the side surface is substantially U-shaped, there is not enough distance to exceed the longitudinal main bars, and the outer-tightened cross-jointed metal fitting body with the side surface being substantially U-shaped cannot be supported in a cross shape. It is necessary when installing the outer joint A shape.

Therefore, the reinforcing frame in which the annular hoop bars are arranged in a lattice pattern at predetermined intervals on the outside of the plurality of longitudinal main bars arranged in a cylinder and the long plate is formed in an annular shape is also in a predetermined position. A predetermined number, each of which is arranged in substantially the same manner, and at least the reinforcing frame is an internal fastening cross joint metal fitting for cross joining of reinforcing bar rods which is assembled without welding at the respective intersecting portions orthogonal to the longitudinal main reinforcing bars. The joint metal fitting is a commercially available U-bolt shape, and a flat U-shaped latching portion and fastening screw portions at both ends thereof are bent or curved in an upright manner to form a reinforcing frame or a hoop bar width or The side corresponding to the width of the diameter is formed in a substantially U-shape or a substantially U-shape as a pair of inner fastening cross support portions, and the latching portion, the pair of inner fastening cross support portions, and a pair of tightening screw portions are arranged in series. The formed inner tightening cross-joint metal body and the pair of tightening screw portions A mounting washer has opened an insertion hole to be threaded, a nut, engaging the該掛retaining portion on the upper side of the longitudinal main reinforcement around the the crossing portion said longitudinal main reinforcement and the reinforcement frame or hoop intersect In addition, a reinforcing frame or a hoop is supported by a pair of inner fastening cross support portions, and the longitudinal main bars below the center are disposed so as to be sandwiched between the standing fastening screw portions and the pair of fastening screw portions. The longitudinal main bars are cross-joined by pressing and supporting the longitudinal main bars through a mounting washer and screwed and tightened with nuts, and the side surfaces of the pair of inner fastening cross-supporting parts that support the reinforcing frame or hoop bars are substantially U-shaped. In the formation width of
Reinforcement that cross-supports the pair of inner-tightening cross support portions so that the pair of inner-tightening cross-support portions does not deform when the lifting fishing support force that hangs the rebar rod vertically upright acts on the pair of inner-tightening cross support portions. By means of an inner fastening cross joint metal fitting formed by a plate width or a diameter width of a frame or a hoop line and the side face of the pair of inner fastening cross support portions formed with substantially the same width as the formation width of the substantially U shape,
When the assembled rebar rod is lifted by a crane and is lifted vertically in a standing state, the rebar rod is bent and twisted, and the force acts on each inner fastening cross joint fitting. When the width of the substantially U-shaped or substantially U-shaped formation of the pair of cross support portions is wider than the plate width or diameter width of the reinforcing frame or hoop muscle, the wide portion becomes a deformable region. When the deformable region is deformed, the inner fastening cross joint metal fitting is loosened, so that the locking force is weakened and the longitudinal main bars are pulled out, but the cross support portion is substantially the same as the plate width or diameter width. By forming it with a width, the deformable region is eliminated, so that no deformation occurs in the formation width of the pair of cross support portions, so that the reinforcing frame or the hoop is Cross join longitudinal main bars Never lifting force is weakened.

  This is because the above-mentioned “upward force” acts on the latching part or the bent part of the pair of cross support parts when the reinforcement frame or the hoop muscle is affected by the deformation. If there is a deformable area in the bent part of the part, it will be deformed by that amount, and conversely if there is no deformable area, it will be directly added to the longitudinal main muscle and its latching part and deformed into the bent part Therefore, the internal fastening cross-joint fittings that are cross-joined are supported without rubbing, so that the internal fastening cross-joint fittings that do not collapse the rebar can be obtained even when assembled without welding. It was.

Therefore, the reinforcing frame in which the annular hoop bars are arranged in a grid pattern at predetermined intervals on the outside of the plurality of longitudinal main bars arranged in a cylinder and the long plate is formed in an annular shape is also in a predetermined position. A predetermined number, each of which is arranged in substantially the same manner, and at least the reinforcing frame is an outer cross-connecting bracket for cross-joining rebar rods that are assembled without welding at the respective crossing portions orthogonal to the longitudinal main bars , The joining bracket has a substantially U-shaped or substantially U-shaped flat surface, and has a pair of fastening screw portions at both ends, and the flat surface has the U-shaped or substantially U-shaped portion as a hooking portion. Each of the latching portion and the pair of tightening screw portions are curved upright, and the side surface corresponding to the diameter width of the longitudinal main bar is substantially U-shaped, and the substantially U-shape is slightly opened. The substantially rectangular shape is used as a pair of outer fastening cross support portions, and the hooking portion, the pair of outer fastening cross support portions, and a pair of An externally tightened cross-jointed metal fitting body in which a fixing screw portion is continuously formed; a mounting washer having an insertion hole through which the pair of tightening screw portions are inserted; and a nut; the vertical main bar and the reinforcing frame or hoop The retaining frame is locked to a reinforcing frame or hoop muscle near the left or right side centered on the intersection where the muscles intersect, and the intersecting vertical main muscle is supported by a pair of external fastening intersection support portions. In addition, the pair of fastening screw parts standing up are arranged so as to sandwich the reinforcing frame or hoop bar in the vicinity of the other side, and the reinforcing frame or hoop bar is pressed through the mounting washer and cross-joined by screwing and tightening with a nut. And the side surfaces of the pair of external fastening cross support portions are in the formation width of the substantially rectangular shape,
Corresponding to the diameter width of the longitudinal main bars in advance so that when the side surfaces of the pair of outer fastening cross support portions are deformed from a substantially rectangular shape to a substantially U shape, the width of the longitudinal main bars is substantially the same. By forming the side surfaces as the pair of external fastening cross-supporting portions having a substantially rectangular shape,
Due to the fishing support force when the rebar rod is lifted upright, a twisting force is generated on the rebar rod and the force acts on each outer fastening cross-joint fitting to cause loosening. By deforming the pair of externally tightened cross support portions of the joint metal fitting from the substantially rectangular shape to a substantially U-shape so as to have the same width as the diameter of the longitudinal main bar, the loose joint is prevented as described above, and the cross joint is performed. It is possible to prevent the vertical main muscle from falling off.

  When it is cross-joined, first, for example, the latching portion is locked to the left reinforcing frame or hoop muscle, and it is attached beyond the longitudinal main reinforcement at the center intersecting from the tip of the pair of tightening screw portions. When the mounted state is screwed and tightened through the mounting washer while the side surface is in the substantially round shape, the formation width of the pair of cross support portions sandwiching the longitudinal main bar is screwed to the latching portion and the pair of tightening screw portions. It is screwed in a wide state between the attached mounting washer, that is, it is screwed in a state where the difference in opening size between the substantially U-shaped and the substantially rectangular shape is wide. The difference is that the difference between the width derived from the substantially U-shape and the width derived from the substantially rectangular shape is formed as the width of the deformable region, and as described above, the substantially rectangular shape can be deformed. There is a region, and by transforming it into a substantially U shape, There is no deformable zone of the width, it does not cause loosening by screwing a pair of outer clamping intersecting support portion is deformed into a substantially U-shape from this.

  In other words, when the deformable region is bent and the twisting force is applied to the reinforcing bar rod, the pair of tightening screw portions are deformed by the amount of the deformable region and the mounting washer is loosened and moved. The pressing support force of the outer fastening cross joint metal fitting is loosened, but the side surfaces of the pair of outer fastening cross support portions are deformed from the substantially rectangular shape to a substantially U shape, By making the width between the pair of tightening screw portions the same as the width of the longitudinal main bar, the deformable region is eliminated, and the pair of tightening screw portions will not be deformed even if the bending or twisting force of the reinforcing bar is applied. Therefore, the outer fastening cross-joint fitting does not loosen, and it is possible to prevent the longitudinal main bars from falling off even without welding.

This is because the above-mentioned “upward force” acts on the latching part or the bent part of the pair of cross support parts when the reinforcement frame or the hoop muscle is affected by the deformation. If there is a deformable area in the bent part of the part, it will be deformed by that amount, and conversely if there is no deformable area, it will be directly added to the longitudinal main muscle and its latching part and deformed into the bent part Therefore, the outer fastening cross-joining metal fittings that are cross-joined are supported without rubbing. As a result of obtaining an externally tightened cross joint fitting that does not cause the steel bar to collapse, it can be assembled without welding.
Therefore, the present invention has a practically significant effect.

  It is a top view of the reinforcing bar rod 1 of the present invention.   It is a perspective view of the principal part which shows the cross-joining state of the longitudinal main reinforcement 2, the reinforcement frame 4, and the hoop reinforcement 3 of this invention.   It is a perspective view of the inner fastening cross joint metal fitting 5a of this invention.   It is a perspective view of the principal part which shows the cross-joining state of the longitudinal main reinforcement 2, the reinforcement frame 4, and the hoop reinforcement 3 of this invention.   It is a perspective view of the outer fastening cross-joint fitting 5b of the present invention.   It is a side view of the external fastening cross-joint metal body 10b of the present invention.   It is a side view of the principal part which shows the attachment state of the external fastening cross-joint metal fitting body 10b of this invention.   It is a side view of the principal part which shows the state which deform | transformed and attached the external fastening cross-joining metal fitting 5b of this invention.   It is a top view of the principal part which shows the state which deform | transformed and attached the outer fastening cross-joint metal fitting 5b of this invention.   It is a front view of the principal part which shows the state which screwed the inner fastening cross-joining metal fitting 5a of this invention.   It is a side view of the principal part which shows the curved state of the mounting washer 11 of this invention.   It is a side view of the principal part which shows the state which screwed the inner fastening cross-joining metal fitting 5a to the reinforcement frame 4 of this invention.   It is a top view of the principal part which shows the state which screwed the inner fastening cross-joining metal fitting 5a to the reinforcement frame 4 of this invention.   It is a side view of the principal part which shows the state where the fishing support force was added to the inner fastening cross-joining metal fitting 5a of the reinforcement frame 4 use of this invention.   It is a side view of the principal part which shows the state where the fishing support force was added to the inner fastening cross-joining metal fitting 5a of the reinforcement frame 4 use of this invention.   It is a side view of the principal part which shows the state which screwed the inner fastening cross-joining metal fitting 5aa to the hoop muscle 3 of this invention.   It is a top view of the principal part which shows the state which screwed the inner fastening cross-joining metal fitting 5aa to the hoop muscle 3 of this invention.   It is a side view of the principal part which shows the state where the fishing support force was added to the inner fastening cross-joining metal fitting 5aa of the hoop muscle 3 use of this invention.   It is a side view of the principal part which shows the state where the fishing support force was added to the inner fastening cross-joining metal fitting 5aa of the hoop muscle 3 use of this invention.

In the first embodiment, the inner fastening cross-joint fitting that cross-joins the longitudinal main bar of the reinforcing bar and the reinforcing frame or the hoop bar is provided with a hook portion having a substantially U-shaped plane and a pair of tightening screw portions rising from both ends. Forming a pair of inner fastening cross support portions by bending or bending into a shape, and an inner fastening cross joint metal fitting body in which the latching portion, a pair of inner fastening cross support portions, and a pair of tightening screw portions are formed continuously, a mounting washer, constructed in the nut, said longitudinal main reinforcement and the reinforcing frame or reinforcement frame or the pair hoop with hoop is engaging the該掛retaining portion on the upper side of the longitudinal main reinforcement from the center of the cross section intersecting in is supported by the clamping cross support section, clamping screwing by pressing and supporting the nuts said longitudinal main reinforcement through the attachment washer with placing the pair of clamping screw portion so as to sandwich the lower of the vertical main bars from the intersection in mounting method for cross joining up of the intersection The causes hanging upright reinforcing bars cage vertically to its lifting side, near the lower side with fishing支力lifting is above the said cross section is engaged with the engaging portion on the side near the longitudinal main reinforcement acting By using the inner fastening cross-joint mounting method in which a pair of tightening screw portions are arranged on each longitudinal main bar, it is possible to provide a reinforcing bar that does not cause collapse even if assembled without welding.

  In the second embodiment, when the mounting washer is screwed and tightened to the pair of tightening screw portions with a nut through the mounting washer, the mounting washer is curved in the range of 6 to 9 degrees to the left and right with the longitudinal main bar as the center. By using the method of attaching the inner fastening cross-joint fittings that are screwed and tightened, it has been possible to provide a reinforcing bar that does not cause collapse even if it is assembled without welding.

In the third embodiment, the outer fastening cross-joint fitting for cross-joining the hoop and reinforcing frame of the reinforcing bar and the longitudinal main reinforcing bar has a substantially U-shaped or U-shaped hooking portion, and both end portions thereof. A pair of tightening screw portions on the side are bent upright to form a substantially U-shaped side surface, and are formed as a pair of externally tightened cross-supporting portions that are substantially U-shaped and slightly open. A reinforcing frame or hoop bar in the vicinity of either the left or right side centered on the intersection where the vertical main bar and the reinforcing frame or hoop line intersect each other. The vertical main bar is supported by a pair of external fastening cross support parts, and the reinforcing frame or hoop is crossed by pressing support and screw tightening with a nut via a mounting washer on the other side. It is supported by the outer fastening cross-joint body to be joined, and the pair After the outer fastening cross support portion is deformed from a substantially rectangular shape to a substantially U shape, the reinforcing frame or the hoop muscle is pressed and supported via a mounting washer and screwed and tightened with a nut. With the mounting method, it was possible to provide rebar rods that would not lead to collapse even if assembled without welding.

The fourth embodiment is an inner fastening cross-joint fitting that cross-joins the reinforcing bar hoop and reinforcing frame with the longitudinal main reinforcing bar. The inner fastening cross-joint fitting includes a hook portion having a substantially U-shaped plane and both ends thereof. The tightening screw portion is bent or curved in an upright manner to form a pair of inner fastening cross support portions whose side faces are substantially U-shaped or substantially U-shaped, and the latching portion and a pair of inner fastening cross support portions And an inner-tightening cross-jointed metal fitting body in which a pair of tightening screw portions are continuously formed, a mounting washer, and a nut, and the vertical main bar and the reinforcing frame or the hoop bar cross above the crossing part. the hook member with engaged crossed joining reinforcing frame or hoop of a pair of inner clamping cross support section, while placing the pair of clamping screw portion so as to sandwich the lower of the vertical main bars of the crossing portion The vertical bar is supported by pressing and tightening with a nut through a mounting washer. The inner clamped cross-jointed metal fittings, which have a substantially U-shaped width on the side surface of the inner-tightened cross-jointed bracket body to be joined, are formed to have the same width as the width of the reinforcing frame or hoop bar. We have realized the provision of rebar rods that have nothing.

In the fifth embodiment, the outer fastening cross-joint fitting for cross-joining the reinforcing bar hoop and reinforcing frame with the longitudinal main reinforcing bar has a substantially U-shaped or substantially U-shaped hooking portion and both end portions. A pair of tightening screw portions on the side are bent upright to form a side surface in a substantially U shape, and the substantially U shape is deformed into a substantially open shape that is slightly opened to be continuously provided as a pair of external fastening cross support portions. an outer clamping cross joint device body formed, a mounting washer, constructed in the nut, reinforcing the left or right one side near the center of the intersection which intersects joining the hoop and the reinforcing frame and the longitudinal main reinforcement of the reinforcing bars cage The frame or hoop bar is engaged with the latching part and the vertical main bar is supported by a pair of outer fastening cross support parts, and the reinforcing frame or hoop bar is pressed on the other side via a mounting washer and screwed with a nut. When cross-joined by tightening, the hooks on both sides of the longitudinal main muscle And the pair of outer tightening cross support portions mounted so that each of the pair of tightening screw portions stands up and sandwiched, when the sandwiching width of the substantially reshape is changed from a substantially reshape to a substantially U shape, Reinforcing bar that does not lead to collapse even if it is assembled without welding by means of an externally fastened cross joint metal fitting formed in advance in a substantially rectangular shape corresponding to the width of the vertical main bars so as to be substantially the same width as the vertical main bars Realized the provision of.

  And the rebar rod assembled without welding of the problem is in proportion to the amount of bending and torsion of the rebar rod when it is hung up, and the amount of rubbing at the latching portion of the main bar that each cross-joining bracket locks The twisting and rubbing occur relative to each other. Therefore, by suppressing the rubbing to a small extent, the twisting is small, and on the contrary, the rubbing is large, and an excessive force is applied to the tightening screw part of the cross-connecting bracket. The rupture of the reinforcing bar was achieved by rupturing, and it was possible to provide a crossed joint that minimizes the friction of the crossed joint and does not greatly deform the reinforcing bar.

  An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a reinforcing bar rod, and the reinforcing rod rod 1 is provided with a longitudinal main reinforcing rod 2 arranged in a column shape and an annular hoop bar 3 and a reinforcement. The frames 4 are externally fitted at predetermined intervals so as to intersect with each other in a lattice shape and are combined in a column shape, and enter the inside of the columnar rebar rod 1 and enter the inner fastening cross joint metal fittings 5a, 5a,. Are assembled by cross-joining from the outside by external fastening cross-joining metal fittings 5b, 5b,.

  Therefore, as for the longitudinal main reinforcing bar 2 used for the reinforcing bar 1, the reinforcing bar diameter of the vertical reinforcing bar 2 is appropriately selected depending on the scale of the pile to be constructed, and a reinforcing bar having a diameter larger than that of the hoop reinforcing bar 3 is usually used. The rebar 3 is formed in an annular shape by welding both ends of the reinforcing bar to be used. The hoop rebar 3 is externally arranged in a lattice pattern at a predetermined interval with respect to the longitudinal main rebar 2, and mainly the binding wire 6. Are held together.

  Then, the hoop muscles 3 and the reinforcing frames 4 respectively arranged on the vertical main bars 2 are cross-joined, and the hoop muscles 3 are connected to the vertical main bars 2 and the hoop muscles by a binding wire 6 as shown in FIG. The reinforcing frame 4 has a flat plate shape as shown in FIG. 2 and is formed in advance by welding its both ends to form an annular shape. The reinforcing frame 4 is arranged in the above-mentioned column shape. It is externally fitted to the longitudinal main bar 2 provided, intersects with the vertical main bar 2 in a grid pattern at predetermined intervals, and is cross-joined with the inner fastening cross-joining metal fittings 5a, 5a,.

  1 is used when the tightening work from the outside of the reinforcing bar 1 is easy, and the longitudinal main bar 2 and the hoop bar 3 of the reinforcing bar 1 are used. The operation of cross-joining the reinforcing frame 4 is appropriately selected for the inner side and the outer side depending on the ease of the working direction, and depending on the work, the inner fastening cross-joining fitting 5a or the outer fastening cross-joining fitting 5b is selected. Is selected.

  Therefore, as shown in FIGS. 2 and 3, the inner fastening cross-joint fitting 5a is in the shape of a commercially available U-bolt, and includes a substantially U-shaped hooking portion 7a and a pair of fastening screw portions 8a and 8a. A pair of cross support portions 9a and 9a whose side surfaces are bent in an upright shape to form a substantially U shape, and a cross joint metal fitting body 10a is formed by the latching portion 7a and the pair of tightening screw portions 8a and 8a. Then, the pair of tightening screw portions 8 a and 8 a are inserted into the insertion holes 12 and 12 provided in the flat mounting washer 11 and screwed and tightened with the nuts 13 and 13.

  The width of the substantially U-shape of the pair of cross-supporting portions 9a, 9a of the cross-joint metal body 10a is formed to be substantially the same as the plate width of the reinforcing frame 4 to be supported. If the width is larger than the plate width, the wide portion is formed as a deformable region, which is later deformed, and the cross-joined inner fastening cross-joining metal fitting 5a may be loosened. Is substantially the same as the width of the reinforcing frame 4 to be supported, and when supporting the hoop muscle 3 of another embodiment, it is formed corresponding to the width of the hoop muscle 3.

  Further, as shown in FIGS. 4 and 5, the outer fastening cross-joining metal fitting 5b has a substantially U-shaped flat surface, and has a U-shaped hooking portion 7b and a pair of tightening screw portions 8b, 8b. The side surfaces along the outer diameter of the longitudinal main bars 2 are curved in an upright shape to form a pair of cross support portions 9b, 9b having a substantially U shape, and the latching portion 7b and a pair of tightening screw portions 8b, 8b. Are formed, and the pair of tightening screw portions 8b and 8b are inserted into the insertion holes 12 and 12 formed in the flat mounting washer 11 and screwed and tightened with the nuts 13 and 13, respectively.

  The side surfaces of the pair of cross support portions 9b, 9b of the cross joint metal fitting 10b are substantially U-shaped, as described above, with the diameter width of the longitudinal main bars 2 supported by the pair of cross support portions 9b, 9 being as described above. Correspondingly, the pair of cross support portions 9b, 9b is formed as a width where a deformable region is not formed.

  Thus, in the formation of the outer fastening cross-joining metal fitting 5b when the longitudinal main bars 2, 2,... And the reinforcing frame 4 are crossed and cross-joined to each other by the outer fastening cross-joining metal fitting 5b, As shown in FIGS. 6 and 7, a pair of cross support portions 9b, 9b formed by curving side surfaces in a substantially U shape so as to correspond to the diameter width of the longitudinal main bars 2 are formed in a substantially open shape. As shown in FIG. 7, the substantially U-shaped hooking portion 7b is locked to the reinforcing frame 4, and the reinforcing frame 4 extends from the tip of the pair of tightening screw portions 8b, 8b beyond the longitudinal main bar 2. The crossed vertical main bars 2 are supported by a pair of cross support portions 9b and 9b, and in this state, the pipe handle 14 shown in FIG. As shown in FIG. 8, the pair of cross support portions 9b, 9 are bent in the direction. The mounting is deformed into a substantially U-shape from the symbolic les shape.

  Then, when the attached vertical main bar 2 and the reinforcing frame 4 are cross-joined and screwed together, as shown in FIGS. 8 and 9, the vertical main bar 2 that crosses the reinforcing frame 4 is a pair of substantially U-shaped. The reinforcing frame 4 is pressed and held by the mounting washer 11, and the pair of tightening screw portions 8b and 8b are inserted into the holes 12 and 12 through the mounting washer 11. The vertical main bars 2 and the reinforcing frame 4 are cross-joined with a width that does not form a deformable region in a substantially U shape by screwing and tightening with the nuts 13 and 13.

  With respect to the screw tightening, in the inner tightening cross-joining metal fitting 5a, as shown in FIGS.

  In the curved screw tightening, as shown in FIG. 10, the tightening value screwed and tightened with nuts 13 and 13 via the mounting washer 11 is the same as that when the nuts 13 and 13 are screwed and tightened. A pair of tightening screw portions 8a and 8a are deformed so as to open outward in a substantially inverted C shape with the vertical main bar 2 as the center, and a mounting washer 11 is shown in FIG. As shown in the drawing, each α is bent to the left and right by an angle of α, and the left and right α at that time are screwed and tightened within a range of bending of about 6 to 9 degrees.

  In other words, the bending range of 6 degrees to 9 degrees minimizes the amount of bending of about 6 degrees to the left and right, and the minimum value is the minimum value capable of tightening and supporting the longitudinal main muscle 2, and 9 degrees to the left and right. The degree of bending is set to a maximum value, and the maximum value is a value at which the pressing support force of the longitudinal main muscle 2 is maximized, and the pair of tightening screw portions 8a and 8a are deformed so as to open in a substantially reverse C shape. If the pressing support force of the longitudinal main muscle 2 exceeds the maximum value, the risk of the tightening screw portions 8a, 8a breaking is increased.

  Therefore, when the value of the angle at which the mounting washer 11 bends due to the screwing is about 6 degrees or less, the cross support is loosened due to insufficient tightening, and when it is 9 degrees or more, the reinforcing bar 1 is hung up and twisted, and the influence of the bending is exerted. Since the risk of tearing of the tightening screw portions 8a and 8a is increased, the longitudinal support bar 2 and the reinforcing frame 4 are cross-joined with an optimum supporting force, and the range of the curvature of 6 to 9 degrees is Depending on the plate thickness of the mounting washer 11, the longitudinal main bars 2 to be screwed, the reinforcing frame 4, and the size and shape of the hoop bars 3, there are some fluctuation widths, as shown in FIG. This is because there is nothing to support the mounting washer 11 on the back side of the mounting washer 11 to be screwed and tightened, that is, directly below the screwing and tightening, so that an error occurs in the curved swing width.

  Then, about the influence of the fishing support force when the horizontally assembled rebar 1 is lifted by a crane and lifted vertically in a standing state, when the longitudinal main bar 2 and the reinforcing frame 4 are cross-joined by the cross-joint fitting 5 As shown in FIGS. 12 and 13, the fishing support force exerted on each part of the fishing line includes an “upward force” A of the fishing support force applied to the reinforcing frame 4 and a “downward force of the weight of the vertical main muscle 2 that opposes it. "B" and when the reinforcing bar 1 is hung upright, "upward force" A is applied to the hooking portion 7a of the inner fastening cross-joint fitting 5a via the reinforcing frame 4, and the longitudinal main bar is opposed. 2 has its own weight “downward force” B. At that time, the latching portion (a) of the latching portion 7a to the bent portion 15a, the latching portion (b) of the latching portion 7a and the longitudinal main muscle 2, and a pair The tightening screw portions 8a and 8a and the fixing washers 11 and the locking portions (c) of the longitudinal main bars 2 are respectively provided. Joined by 支力, the fishing 支力 is (a), (b), affects the engaging portion (c).

  That is, as shown in FIG. 14, the deformation due to the fishing support force of the inner fastening cross joint fitting 5a in which the latching portion 7a is disposed on the “upper side” and the pair of tightening screw portions 8a and 8a is disposed on the “lower side” When the force "A" is applied, first, the bent portion 15a of the locking portion (A) is pulled up and deformed, and at the same time, the latching portion 7a of the locking portion (B) is locked to the longitudinal main muscle 2. In this state, the locking portion (a) and the locking portion (b) are balanced and support most of the fishing support force there, while a pair of the locking portions (c) is attached via the mounting washer 11. Since the fishing support force is not directly applied to the tightening screw portions 8a and 8a, the pair of tightening screw portions 8a and 8a does not break.

  On the other hand, as shown in FIG. 15, the deformation due to the fishing support force of the inner fastening cross-joint fitting 5a in which the latching portion 7a is disposed on the “lower side” and the fastening screw portions 8a and 8a are disposed on the “upper side” is described above. On the contrary, in a state where the mounting washer 11 of the pair of tightening screw portions 8a, 8a is locked to the longitudinal main bar 2, the "upward force" A is directly applied to the pair of tightening screws via the mounting washer 11. The pair of tightening screw portions 8a and 8a are supported by the pair of fastening screws 8a and 8a through the mounting washer 11 in addition to the portions 8a and 8a, and there is a possibility that the tightening screw portions 8a and 8a will break. growing.

  At the Tokyo Metropolitan Industrial Technology Research Center, which is a publicly-owned local administrative agency, the above-described pair of tightening screw portions 8a and 8a shown in FIG. 14 are mounted on the “lower side”, and the “upper side” in FIG. Table 1 and Table 2 show the results obtained by carrying out a test to apply a force in the direction A shown in each figure in each state attached to each, and carrying out a strength test leading to tearing by the tension. It is for showing.

  That is, from Table 1 and Table 2, the tightening position of the pair of tightening screw portions 8a, 8a indicates a difference in breaking strength value between “upper” and “lower”, and “upper” is a representative example. The maximum value of -1 gives a value of 55.4688 / tf, and the maximum value of C-1 with "lower side" as a representative example shows a value of 66.6094 / tf, which is the tightening value It is a value that leads to tearing of the screw portion 8a, and when a fishing support force is applied when lifting the fishing support from the difference, depending on whether the tightening position of the tightening screw portions 8a, 8a is "upper" or "lower" It shows that the result of greatly different breaking strengths of the tightening screws 8a and 8a was obtained.

  Accordingly, in another embodiment in which the longitudinal main bars 2 and the hoop bars 3 shown in FIGS. 16 and 17 are cross-joined by the inner fastening cross-joining metal fittings 5aa, the inner fastening substantially the same as the embodiment of FIGS. 12 and 13 described above. In the embodiment of the cross metal fitting, it is used for cross joining of the longitudinal main bar 2 and the hoop bar 3 at different points, and crosses at a position where the vertical main bar 2 and the hoop bar 3 intersect with the inner fastening cross joint metal 5aa. Similarly, the influence of the fishing support force when suspending vertically in an upright state is such that "upward force" A is applied to the hooking portion 7aa of the inner fastening cross-joining metal fitting 5aa via the hoop muscle 3, In contrast, the vertical main bar 2 has its own weight of “downward force” B. At that time, the latching part 7aa or the locking part (a) of the pair of cross support parts 9aa, 9aa, the latching part 7aa and the vertical main bar 2 Locking part (b), tightening screw part 8aa, 8aa and mounting Each joined by fishing 支力 the respective positions of the engaging portion of the washer 11 and the longitudinal main reinforcement 2 (c), by its fishing 支力 (a), (b), affects the engaging portion (c).

  That is, the deformation due to the fishing support force of the inner fastening cross joint fitting 5aa in which the latching portion 7aa shown in FIG. 18 is arranged on the “upper side” and the fastening screw portions 8aa, 8aa on the “lower side” is “upward force”. When A is added, first, the pair of cross support portions 9aa, 9aa of the locking portion (A) is deformed upward, and at the same time, the latching portion 7aa of the locking portion (B) is locked to the longitudinal main muscle 2. In this state, the locking portion (A) and the locking portion (B) are balanced and support most of the fishing support force there, while the fastening screw (c) is tightened via the mounting washer 11. Since the fishing support force is not directly applied to the portions 8aa and 8aa, the tightening screw portions 8aa and 8aa do not break.

  On the other hand, as shown in FIG. 19, the deformation due to the fishing support force of the inner fastening cross-joint fitting 5aa in which the latching portion 7aa is arranged on the “lower side” and the fastening screw portions 8aa and 8aa are arranged on the “upper side” is described above. On the contrary, in a state where the mounting washer 11 of the pair of tightening screw portions 8aa and 8aa is locked to the longitudinal main bar 2, the "upward force" A is directly applied to the pair of tightening screws via the mounting washer 11. In addition to the portions 8aa and 8aa, a pair of tightening screw portions 8aa and 8aa will support most of the fishing support force via the mounting washer 11, and there is a possibility that the tightening screw portions 8aa and 8aa will break. growing.

  From the above, the influence of the fishing support force when the reinforcing bar 1 is lifted by a crane and is lifted vertically is determined by whether the hooks 7a and 7aa are on the direction side of "upward force" A. Depending on whether the pair of reverse tightening screw portions 8a and 8aa is used, the tearing of the tightening screw portions 8a and 8aa is greatly affected, and the breaking strength of the latching portions 7a and 7aa and the pair of tightening screw portions 8a and 8aa is increased. In comparison, the strength of the threaded portion is weak, and the threaded portion is cut and thinned, and stress concentration easily occurs, so that it is easy to tear. 7a, 7aa is found to support.

  In each of the above-described embodiments, the longitudinal main bars 2 are on the inner side, the reinforcing frame 4 and the hoop bars 3 are on the outer side, and in each cross joint portion, depending on the work positions on the inner side and the outer side of the reinforcing bar 1, In the case of the embodiment in which the reinforcing frame 4 is assembled with the dedicated metal fitting of the joint metal fitting 5a or the outer fastening cross joint metal fitting 5b and the reinforcing frame 4 is opposite to the outer main embodiment with respect to the longitudinal main reinforcing bars 2, respectively The mounting state of the cross-joining metal fittings and the external cross-joining metal fittings is also opposite to the above, but the illustration is omitted.

  Further, although the reinforcing bar 1 is cylindrical, the mounting state of the internal cross joint fitting and the external cross joint fitting is assembled with the same configuration even though it is formed in a flat wall shape, but the illustration is omitted.

  Further, a locking nut is used as the nut 13, which is twisted, bent, and curved by the influence of the fishing support force when the reinforcing bar 1 is lifted by a crane and suspended vertically. Such deformations occur, and the loosening of the screw tightening of the nuts of the cross-joining metal fittings due to the deformation is prevented and further deformation and collapse of the reinforcing bar 1 are prevented by the loosening, but the illustration is omitted in particular.

  The method of attaching the cross-joint bracket of the reinforcing bar rod of the present invention and the cross-joint bracket are assembled by assembling the reinforcing bar rod used for the seismic foundation, and cross-joining the longitudinal main bar, the reinforcing frame and the hoop bar of the reinforcing rod rod. Can be used as a cross-joint fitting.

DESCRIPTION OF SYMBOLS 1 Reinforcement rod 2 Longitudinal reinforcement 3 Hoop reinforcement 4 Reinforcement frame 5a, 5aa Inner fastening cross joint fitting 5b Outer fastening cross joint fitting 7a, 7aa Hanging part 7b Hanging part 8a, 8aa Tightening screw part 8b Tightening screw part 9a, 9aa Supporting part 9b Crossing support part 10a, 10aa Cross joining metal fitting body 10b Cross joining metal fitting body 11 Mounting washer 12 Insertion hole 13 Nut.

Claims (5)

Annular hoop bars are arranged outside the plurality of longitudinal main bars arranged in a cylindrical pattern at predetermined intervals, and reinforcing frames each having a long plate formed in an annular shape are arranged at predetermined positions in substantially the same manner. , At least the reinforcing frame is a method for attaching an inner fastening cross-joint fitting for cross-joining rebar rods to be assembled without welding each crossing portion orthogonal to each longitudinal main bar,
The inner fastening cross-jointed metal fitting is a commercially available U-bolt-shaped hook part having a substantially U-shaped plane and a pair of fastening screw parts at both ends of the plate or diameter width of a reinforcing frame or hoop. The side portions are bent or curved in an upright manner so that the side faces are substantially U-shaped or substantially U-shaped, and are formed as a pair of inner fastening cross support portions. An inner fastening cross-jointed metal fitting body in which a pair of tightening screw portions are continuously formed, a mounting washer having an insertion hole through which the pair of tightening screw portions are inserted, and a nut,
Above the longitudinal main reinforcement around the the crossing portion in which the said longitudinal main reinforcement and the reinforcement frame or hoop intersect the reinforcing frame or hoop of a pair of inner clamping cross support part with engaging the該掛locking portion was supported, then the lower side of the vertical main bars from the intersection, pressing and supporting the said longitudinal main reinforcement through the mounting washer to the pair of fastening screw part as well as arranged so as to sandwich at the pair of fastening screws portion erecting and make cross-bonding by screwing fastening by the nut, the engaging portion above the clamping cross-connecting bracket main body, in the mounting position relationship in the upper and lower pair of clamping screw portion,
The the lifting side to cause hanging upright reinforcing bars cage vertically, with the upper side of the intersection, the longitudinal main reinforcement of the side near to a upper side lifting fishing支力acts to lock the該掛stop portion A method of attaching an inner fastening cross-joint fitting, characterized in that a pair of fastening screw portions are arranged on the longitudinal main bars in the vicinity of the lower side. The mounting washer when tightened with a nut through a mounting washer to a pair of tightening screw parts of the inner tightening cross-joint fitting is curved in a range of about 6 degrees to about 9 degrees to the left and right about the longitudinal main bar. The method of attaching a cross-joint fitting according to claim 1, wherein the screws are tightened to the extent that they are tightened. Annular hoop bars are arranged outside the plurality of longitudinal main bars arranged in a cylindrical pattern at predetermined intervals, and reinforcing frames each having a long plate formed in an annular shape are arranged at predetermined positions in substantially the same manner. , At least the reinforcing frame is a method of attaching the outer fastening cross-joint fitting for cross-joining the reinforcing bar rods to assemble the respective crossing portions orthogonal to the longitudinal main bars without welding ,
The outer fastening cross-joint fitting has a substantially U-shaped or substantially U-shaped plane, has a pair of tightening screw portions at both ends, and the plane hangs the U-shaped or substantially U-shaped portion. The retaining portion and each of the pair of tightening screw portions are bent upright, and the side surface corresponding to the diameter width of the longitudinal main bar is substantially U-shaped, and the substantially U-shaped An outer fastening cross-joint metal body formed with a substantially open shape formed as a pair of outer fastening cross-supporting portions, the hooking portion, a pair of outer fastening cross-supporting portions, and a pair of tightening screw portions formed continuously. A mounting washer having an insertion hole through which the pair of tightening screw portions are inserted, and a nut,
The vertical main bars intersecting the vertical main bars and the reinforcing frames or hoop bars in the vicinity of either the left or right side centering on the crossing section where the vertical main bars and the reinforcing frame or hoop bars cross each other. A pair of tightening screw portions that are supported by a pair of external tightening crossing support portions and sandwiching the reinforcement frame or hoop muscle in the vicinity of the other side are arranged, and the reinforcement frame or hoop muscle is pressed through a mounting washer In the cross-joining of the support and the screw tightening with the nut, the side surfaces of the pair of external tightening cross-supporting portions are mounted in the substantially rectangular shape,
After the latching portion is locked to the longitudinal main bars of the intersecting portion and supported by the pair of outer tightening cross support portions, the side surfaces of the pair of outer tightening cross support portions are substantially U-shaped. A method of attaching an outer fastening cross-joint fitting characterized by deforming into a letter shape and cross-joining. Annular hoop bars are arranged outside the plurality of longitudinal main bars arranged in a cylindrical pattern at predetermined intervals, and reinforcing frames each having a long plate formed in an annular shape are arranged at predetermined positions in substantially the same manner. , At least the reinforcing frame is an internal fastening cross-joint fitting that cross-joins the reinforcing bar rods to assemble the crossing portions orthogonal to the longitudinal main bars without welding ,
The inner fastening cross-jointed metal fitting is a commercially available U-bolt shape, and a reinforcing frame or a hoop bar is formed by bending or bending each of a latching portion having a substantially U-shaped flat surface and a fastening screw portion at both ends. The side surface corresponding to the plate width or the diameter width is formed in a substantially U-shape or a substantially U-shape as a pair of inner fastening cross support portions, the latching portion, a pair of inner fastening cross support portions, and a pair of tightening screws. An inner fastening cross-jointed metal fitting body in which the part is continuously formed, a mounting washer having an insertion hole through which the pair of fastening screw parts are inserted, and a nut,
The vertical main muscle, which intersects the vertical main muscle and the reinforcing frame or the hoop muscle, is engaged with the upper vertical main muscle centering on the crossing and the reinforcing frame or the hoop muscle is supported by a pair of inner fastening cross support portions. The vertical main bars below the center are arranged so as to be sandwiched by the pair of standing tightening screw portions, and the vertical main bars are pressed to the pair of tightening screw portions via a mounting washer and screwed with a nut. In the cross-joining of tightening, the side surfaces of the pair of inner fastening cross-support portions that support the reinforcing frame or hoop are formed in a substantially U-shaped formation width.
Reinforcement that cross-supports the pair of inner-tightening cross support portions so that the pair of inner-tightening cross-support portions does not deform when the lifting fishing support force that hangs the rebar rod vertically upright acts on the pair of inner-tightening cross support portions. An inner fastening cross-joint fitting characterized in that a plate or diameter width of a frame or a hoop is formed, and the side surfaces of the pair of inner fastening cross-supporting portions are formed with substantially the same width as the formation width of a substantially U-shape. . Annular hoop bars are arranged outside the plurality of longitudinal main bars arranged in a cylindrical pattern at predetermined intervals, and reinforcing frames each having a long plate formed in an annular shape are arranged at predetermined positions in substantially the same manner. , At least the reinforcing frame is an outer fastening cross-joint fitting that cross-joins the reinforcing bar rods to assemble each crossing portion orthogonal to each longitudinal main bar without welding ,
The outer fastening cross-joint fitting has a substantially U-shaped or substantially U-shaped plane, has a pair of tightening screw portions at both ends, and the plane hangs the U-shaped or substantially U-shaped portion. The retaining portion and each of the pair of tightening screw portions are bent upright, and the side surface corresponding to the diameter width of the longitudinal main bar is substantially U-shaped, and the substantially U-shaped An approximately cross-shaped portion formed by slightly opening is used as a pair of external fastening cross support portions, and an external fastening cross joint metal fitting body in which the latching portion, a pair of external fastening cross support portions, and a pair of tightening screw portions are formed continuously, A mounting washer that has an insertion hole through which a pair of tightening screw parts are inserted, and a nut;
The vertical main bars intersecting the vertical main bars and the reinforcing frames or hoop bars in the vicinity of either the left or right side centering on the crossing section where the vertical main bars and the reinforcing frame or hoop bars cross each other. A pair of tightening screw portions that are supported by a pair of external tightening crossing support portions and sandwiching the reinforcement frame or hoop muscle in the vicinity of the other side are arranged, and the reinforcement frame or hoop muscle is pressed through a mounting washer It is a cross joint of screw tightening with a support and a nut, and the side surfaces of the pair of external tightening cross support portions are in the formation width of the substantially rectangular shape,
Corresponding to the diameter width of the longitudinal main bars in advance so that when the side surfaces of the pair of outer fastening cross support portions are deformed from a substantially rectangular shape to a substantially U shape, the width of the longitudinal main bars is substantially the same. An outer fastening cross-joint fitting, wherein the side faces are formed as the pair of outer fastening cross-supporting portions having a substantially rectangular shape.

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