JP3042301U - Reinforcing bar holder for pressure welding work - Google Patents

Abstract

(57) [Abstract] [Problem] In the conventional reinforcing bar suspension method for gas pressure welding work of reinforcing bars, wires and the like are simply wound directly around the reinforcing bars, so that there is a risk of falling and the work is troublesome. SOLUTION: Two upper and lower holding members 19 and 21 are provided, the upper holding member 19 has a cylindrical reinforcing bar insertion portion 23 and three sets of rope attachment portions 25, and the lower holding member 21 is a tightening bolt 41. It has a reinforcing bar fixing part 39 and a hook 43.
When using it, attach the rope attachment part 25 to the hanging rope 67.
One end 27 of the reinforcing bar 27 for fixing the hook 43 and the hook 43
The vicinity of a is passed through the rebar insertion portion 23, and the other end 27 of the rebar 27
The portion near b is fixed to the reinforcing bar fixing portion 39. Therefore, when the suspension rope 67 is pulled up, the reinforcing bar 27 is fixed to the one end portion 27a.
The work of holding the reinforcing bars 27 can be quickly completed by being stably hung in a vertical posture with the above.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a rebar retainer for press-fitting rebars, and in particular, in a press-fitting work of rebars in which two rebars in a longitudinal position are axially butted against each other and the abutting ends of the two rebars are press-welded to each other. The present invention relates to a reinforcing bar holder for suspending an upper reinforcing bar.

[0002]

[Prior art]

 For example, in the construction of reinforced concrete high-rise building in the construction of buildings and piers, as the construction extends upward, reinforcing bars are connected in the axial direction. In this case, there are various methods such as gas pressure welding method, arc pressure welding method, color pressure welding method, resin pressure welding method, screw coupler method, thermite pressure welding method, etc. Mostly used.

FIG. 6 shows an example of a conventional rebar pressure welding work for connecting rebars by a gas pressure welding method. In the figure, 1 indicates a lower rebar, and 3 indicates an upper rebar, that is, a rebar added to the lower rebar 1. Reference numeral 5 denotes a spring-driven pressure welding machine. A fixed side clamp 7 of the pressure welding machine 5 is fixed near the upper end of the lower reinforcing bar 1. Reference numeral 9 denotes a suspension hook fixed to the tip of a hoisting wire of a crane truck or the like. One end of an appropriate suspension rope 11 is fixed to the suspension hook 9, and the other end of this suspension rope 11 is on the upper side. It is wound around the upper end of the reinforcing bar 3 and the upper reinforcing bar 3 is suspended thereby.

Then, the upper reinforcing bar 3 is carried by the operation of the crane vehicle and is positioned so that it is directly above the lower reinforcing bar 1, while its lower end is indicated by a solid line in FIG. It is abutted against the upper end of the lower reinforcing bar 1, and here, the movable side clamp 13 of the pressure welding machine 5 is fixed near the lower end of the upper reinforcing bar 3. Next, the pressure welding machine 5 is driven to relatively press the upper and lower rebars 1 and 3 to each other, and in this state, the butt ends 15 of the rebars 1 and 3 are heated and joined by a gas burner.

[0005]

[Problems to be solved by the device]

 Since such pressure welding work between the reinforcing bars is inevitably performed at a high place, it is a dangerous task by itself, and holding the upper reinforcing bar 3 and fixing it to the pressure welding machine 5 are stable. It is necessary to be carried out in advance, and it is required that the work is easy.

However, in the above-mentioned conventional work of this type, there is a problem that the upper rebar 3 is held in an unstable manner, and this holding and fixing to the pressure welding machine 5 takes time. That is, since the upper reinforcing bar 3 is held by winding the suspending rope 11 directly around the reinforcing bar 3, there is a great risk that the holding state is unstable and there is a risk of falling. It was Moreover, since the suspension rope 11 must be wound and unwound for each rebar, this work takes time, resulting in inefficiency. In addition, winding and unwinding are repeated many times. In addition, there was a problem that the hanging rope 11 was attached to the winding rope and it became more difficult to work.

Since the upper reinforcing bar 3 is suspended by the hanging rope 11, the posture of the reinforcing bar 3 inevitably inclines as shown by the solid line in FIG. When the posture of the upper reinforcing bar 3 is inclined, not only is it difficult to fix the pressure welding machine 5 to the movable side clamp 13, but also the opening dimension required for the pressure welding surface of the reinforcing bar is changed, and the pressure welding strength is increased. It is also a cause of the decline.

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to suspend a reinforcing bar in an extremely stable and substantially vertical posture, and further, to hold and release the reinforcing bar. It is an object of the present invention to provide a reinforcing bar holder for pressure welding work of a reinforcing bar that can be completed quickly.

[0009]

Means for Solving the Problems To achieve this object, a reinforcing bar holder for press-fitting a reinforcing bar of the present invention is for holding a reinforcing bar in a vertical position, and has a cylindrical shape. And an upper holding member having rope attaching means attached to the suspension rope, and a lower holding member having a reinforcing rod fixing portion detachably fixed to the reinforcing bar and a rope attaching means attached to the hanging rope. By virtue of this, it is possible to suspend the rebar extremely stably and in a substantially vertical posture, and moreover, it is possible to quickly hold and release the rebar.

According to a second aspect of the present invention, in the reinforcing bar holder for pressure welding work according to the first aspect, the rope attaching means of the upper holding member is positionally adjustable with respect to the hanging rope. This makes it possible to quickly adapt to reinforcing bars of various lengths without having to remove the upper holding member from the suspension rope.

According to a third aspect of the present invention, there is provided a reinforcing bar holder for pressure welding of a reinforcing bar according to claim 1 or 2, wherein the reinforcing bar fixing portion of the lower holding member is a side on which the reinforcing bar can be detached from the side. A side opening is provided to make it easier to hold the reinforcing bar.

[0012]

[Embodiment of the invention]

 The reinforcing bar holder 17 according to the embodiment of the present invention will be described below with reference to FIGS. 1 to 5. The reinforcing bar holder 17 is composed of an upper holding member 19 and a lower holding member 21. The upper holding member 19 is composed of a reinforcing bar insertion portion 23 and three rope attachment portions 25. The reinforcing bar insertion portion 23 has a cylindrical shape, the inner diameter of which is slightly larger than the thickness of the reinforcing bar 27, and the length thereof is about 6 times the outer diameter. The three sets of rope attachment parts 25 are provided at the middle part and both ends of the outer peripheral surface of the reinforcing bar insertion part 23, and each of them is a U-bolt 29 and a crimper 31 slidably supported by the U-bolt 29. And two nuts 33. The U-bolt 29 is oriented so as to project from the outer peripheral surface of the reinforcing bar insertion portion 23 in a direction orthogonal to the axial direction thereof, and the U-shaped bent portion is pressed against the reinforcing bar insertion portion 23 by 35, and these three U bolts 29 are reinforced. It is arranged along the axial direction of the insertion portion 23.

The crimping member 31 is formed by integrally forming a substantially oval plate-shaped base 31a and upper and lower crimping portions 31b protruding from one side surface in the thickness direction of the base 31a. One insertion hole 31c is formed, and a substantially U-shaped notch 31d opened toward the side opposite to the base 31a is formed in the crimp portion 31b. Then, the two bolt portions 29a of the U bolt 29 are individually inserted into the two insertion holes 31c of the crimping member 31, and the nuts 33 are screwed into the bolt portions 29a. Therefore, a substantially circular rope through hole 37 (see FIG. 4) is formed by the root-side end of the U bolt 29 and the notch 31d of the crimp portion 31b.

The lower holding member 21 includes a reinforcing bar fixing portion 39, a tightening bolt 41, and a hook 43. The reinforcing bar fixing portion 39 has a substantially U-shape when viewed from above and below, and therefore, the reinforcing bar fixing portion 39 has a side opening 39a that is open to the side. The hook mounting wall 45 projects from a position near one end of the intermediate wall of the reinforcing bar fixing portion 39. Further, a relatively large-diameter screw hole 47a is formed in one of the two side walls 47, 49 of the reinforcing bar fixing portion 39 facing each other, and the other side wall 49 is formed into a substantially square shape toward the one side wall 47. Bent to open in shape.

The tightening bolt 41 is formed by integrally forming a screw shaft portion 41a and a hexagonal prism-shaped tool engaging portion 41b protruding from the other end of the screw shaft portion 41a. The sphere 41c is provided in a storage shape. The screw shaft 41 a of the tightening bolt 41 is screwed into the screw hole 47 a of the reinforcing bar fixing portion 39. Reference numeral 51 denotes a hole formed in the hook mounting wall 45, and the shaft 53 is passed through the hole 51 with a margin. The hook 43 is substantially U-shaped, and both ends thereof are coupled to both ends of the shaft 53, whereby the hook 43 is supported rotatably around the shaft 53. The reinforcing bar holder 17 is configured as described above.

Reference numeral 57 denotes a pressure welding machine for gas pressure welding work (see FIGS. 2 and 3). The pressure welding machine 57 includes an outer cylinder 59, a fixed clamp 61 fixed to the lower end of the outer peripheral surface of the outer cylinder 59, and a movable clamp 63 slidably supported by the outer cylinder 59. It is composed of a high-pressure rubber hose 65 extending from the upper end of the outer cylinder 59, and a pump or the like (not shown) to which the tip of the high-pressure rubber hose 65 is connected. It is pressed toward 61.

Next, an example of a method of using the reinforcing bar holder 17 will be described (see FIGS. 2 and 3). First, the upper and lower holding members 19 and 21 are attached to the hanging rope 67. The attachment of the lower holding member 21 to the suspension rope 67 is performed by tying the tip portion 67a of the suspension rope 67 to the hook 43. The upper holding member 19 may be attached to the hanging rope 67 as follows. That is, with the nut 33 and the crimping member 31 removed from the U bolt 29, the suspension rope 67 is passed inside the three U bolts 29, and then each bolt portion of the U bolt 29 is inserted into the insertion hole 31c of the crimping member 31. 29a, and the nut 33 is screwed into the bolt portion 29a. As a result, the hanging rope 67 is continuously passed through the three rope attachment portions 25. When the nut 33 is tightened in this state, the holding member 19 is fixed to the hanging rope 67.

Before tightening the nut 33, the length from the portion of the suspension rope 67 through which the upper holding member 19 is passed to the tip portion 67a is somewhat shorter than the length of the reinforcing bar 27 to be suspended. It is good to adjust so that However, this adjustment can be done at any time after tightening the nut 33 and by loosening the nut 33. Further, the hanging rope 67 to be used may be the hoisting wire itself of a crane vehicle or another hanging rope that can be connected to the hoisting wire hanging hook.

While performing such an attachment work, the fixed-side clamp 61 of the pressure welding machine 57 is attached to the upper end of the intended lower rebar 1.

After attaching the upper and lower holding members 19 and 21 to the suspending rope 67 as described above, the portion near the one end portion 27a of the reinforcing bar 27 to be suspended is inserted into the reinforcing bar insertion portion of the upper holding member 19. The reinforcing bar fixing portion 39 of the lower holding member 21 is fixed to a part of the reinforcing bar 27 near the other end 27b. This fixing is performed by inserting a part near the other end 27b of the reinforcing bar 27 into the reinforcing bar fixing part 39 through the side opening 39a and then tightening the tightening bolt 41 (see FIG. 5). This portion is pressure-bonded and fixed by the side wall 49 and the sphere 41c.

When the hoisting wire of the crane vehicle is hoisted from this state, the reinforcing bar 27 is hoisted in a substantially vertical posture with one end 27a facing upward. That is, the center of gravity of the reinforcing bar 27 is supported only by the holding member 21 on the lower side, but the holding members 19 and 21 separately hold two positions, one near the upper end and the other near the lower end. This is because the vertical posture is parallel to the hanging rope 67. Since the position near the lower end is firmly fixed to the hanging rope 67 via the holding member 21 on the lower side, there is no fear of falling by any chance. Since the upper end of the reinforcing bar 27 is inserted into the reinforcing bar insertion portion 23 with a slight margin, it may swing to the side to some extent, but this margin is slightly smaller than the length of the reinforcing bar 27. Since it is a small amount, it is not such that the vertical posture collapses.

Then, by operating the boom or arm of the crane vehicle, the reinforcing bar 27 is carried right above the target lower reinforcing bar 1 and is lowered while being aligned with the reinforcing bar 1 so that the reinforcing bar 27 The lower end is abutted against the upper end of the lower reinforcing bar 1, and the movable clamp 63 of the press machine 57 is fixed to the portion near the other end 27b. At this time, since the reinforcing bar 27 is held in a vertical posture, the butting with the lower reinforcing bar 1 can be performed accurately without tilting, and since the posture is not tilting, the operating clamp 63 is attached. Can be performed stably. After the material (reinforcing bar 27) is set in this way, the tightening of the tightening bolts 41 is loosened to release the crimping of the lower holding member 21 to the reinforcing bar 27, and the lower holding member 21 is moved from the reinforcing bar 27 to the side. Remove towards. When the winding wire is wound up from this state, the upper holding member 19 comes out of the reinforcing bar 27. After this, the reinforcing bar holder 17 is lowered to the ground and attached to the next reinforcing bar.

Then, while driving the pressure welding machine 57, the ring-shaped crater 69a of the blow pipe 69 (see FIG. 3) is made to face the butt ends of the reinforcing bars 1 and 27 so as to surround them, and the butt ends are heated. The parts are heat bonded.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and there may be changes in design within the scope not departing from the gist of the present invention. Also included in the present invention. For example, in the embodiment, the reinforcing bar insertion portion of the upper holding member has a cylindrical shape, but this reinforcing bar insertion portion has a function of being able to maintain the posture by inserting a rectangular tube shape, a ring shape or other reinforcing bars. Any shape may be used as long as it has a shape. Further, it goes without saying that the concrete structure of the rope attaching means in the present invention is not limited to the one shown in the embodiment. The present invention is not limited to the gas pressure welding method, and can be widely applied as a reinforcing bar holder for a reinforcing bar joint work by various construction methods.

[0025]

[Effect of the invention]

 As described above, according to the reinforcing bar holder for crimping work of the reinforcing bar according to the present invention, the reinforcing bar intended to be added to the lower reinforcing bar has upper and lower end portions each having two upper and lower holding members. By holding each separately, the posture is made vertical, and the lower end is firmly fixed to the hanging rope 67 via the lower holding member 21. Therefore, since the reinforcing bar can be suspended very stably in a substantially vertical posture, there is no risk of a fall accident, and alignment with the lower reinforcing bar and pressure welding work can be performed easily and highly accurately. . Moreover, since the upper end of the reinforcing bar is held only through the reinforcing bar insertion part, the reinforcing bar can be held and released quickly.

According to the second aspect of the invention, since the rope attaching means of the upper holding member is positionally adjustable with respect to the hanging rope, it is possible to suspend the rope between the upper holding member and the lower holding member. The length of the rope can be adjusted at any time. Therefore, if the length of the reinforcing bar to be suspended changes, the mounting position of the upper holding member with respect to the suspension rope must be changed without removing the upper retaining member from the suspension rope. You can quickly change to the most suitable position according to the length of.

According to the invention of claim 3, since the reinforcing bar fixing portion of the lower holding member allows the reinforcing bar to be attached and detached from the side, it is possible to more easily hold the reinforcing bar by the lower holding member.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of a reinforcing bar holder according to an embodiment of the present invention.

FIG. 2 is a front view showing a state in which reinforcing bars are suspended by using the reinforcing bar holder shown in FIG.

FIG. 3 is an enlarged vertical sectional view of a main part of FIG.

4 is an enlarged cross-sectional view taken along the line AA of FIG.

5 is an enlarged cross-sectional view taken along the line BB of FIG.

FIG. 6 is a diagram showing an example of a work of gas-welding a reinforcing bar.

[Explanation of symbols]

 1 Lower Reinforcing Bar 17 Reinforcing Bar Holder 19 Upper Retaining Member 21 Lower Retaining Member 23 Reinforcing Bar Insertion Section 25 (Rope Retaining Means for Upper Retaining Member) 27 Lower Reinforcing Bar 39, 41 Reinforcing Bar Fixing Section 39a Side Opening Part 43 (of the lower holding member) Rope mounting means 67 Hanging rope

Claims (3)

[Utility model registration claims] 1. A rebar retainer for suspending an upper rebar in a rebar pressure welding operation, in which two butt bars in a vertical posture are axially butted against each other and the butt ends of these two rebars are pressed together. There is a tubular reinforcing bar insertion part and an upper holding member having a rope mounting means attached to the hanging rope, a reinforcing bar fixing part detachably fixed to the reinforcing bar and a rope mounting means attached to the hanging rope. And a lower holding member having the reinforcing member. 2. The reinforcing bar holder for crimping work of a reinforcing bar according to claim 1, wherein the rope attaching means of the upper holding member is positionally adjustable with respect to the hanging rope. Rebar retainer. 3. The reinforcing bar holder for pressure-bonding work of a reinforcing bar according to claim 1, wherein the reinforcing bar fixing portion of the lower holding member has a side opening through which the reinforcing bar can be detached from the side. Characteristic Reinforcing bar holder for pressure welding work.