JPH084171Y2 - Rebar bending tool - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention can easily and easily form a reinforcing bar used in the construction of a reinforced concrete building or a structure or a reinforcing bar exposed from concrete during the construction of a structure into a desired shape on the spot. The invention relates to a portable reinforcing bar bending tool for bending.

[0002]

2. Description of the Related Art Conventionally, as a tool for bending a reinforcing bar used in a reinforced concrete building or a structure into a desired shape, a bending machine which is installed in a predetermined workshop and bends the reinforcing bar by power or manpower is often used. In addition, there is a hand-held tool as shown in Fig. 9 that is carried on the construction site and bends the reinforcing bar exposed from the concrete.

[0003]

The rebar bending tools that have been conventionally used are full-scale large-scale machines powered by the electric motors or hydraulic motors described above, or powered by human power. Even if it is a machine, it is a machine similar to a rebar bending machine that has a widening device that is installed on the base etc. and increases human power by being installed on the base, etc., and these all move when installed on the base It is difficult to bend the reinforcing bars exposed from the construction at the work site on the spot.

By the way, there is quite a lot of work for bending the reinforcing bar exposed from concrete at the work site. For example, the reinforcing bar is bent by the large rebar bending machine as described above, and finishing is performed at the assembly site. As shown in FIG. 2, two manual tools having downwardly extending reinforcing bar engaging grooves 10 on the base 9 and long handles 11 provided on the side wall of the base 9 in a direction intersecting with the reinforcing bar engaging grooves 10 are used. Although it is finished according to the drawing as shown in Fig. 11, it seems that these works are easy, but this work is quite troublesome and requires skill and bending of the reinforcing bars. It is a very fatigued one because it consumes a lot of labor.

The present invention solves the above-mentioned problems and provides a reinforcing bar bending tool capable of bending the reinforcing bar A at the work site with high accuracy and easily and easily with a small amount of labor. It is an intended device.

[0006]

In order to achieve the above object, the present invention has a left support member 2a and a right support member 2a having a space L at which the reinforcing bar A can be supported on the left side and the right side of the tip of the rod-shaped base 1. The reinforcing bar supporting portion 2 is provided by projecting the supporting body 2b, and the distal end portion of the rod-shaped handle 3 is attached to the bar-shaped base body 1 on the gripping portion 1a side next to the reinforcing bar supporting portion 2 by the rod-shaped handle 3 The rod-shaped base 1 is pivotally fixed by a shaft 4 so as to be rotatable, and a reinforcing bar pressing body 5 is provided near the shaft 4 on the rod-shaped handle 3.

The reinforcing bar pressing body 5 may be fixed to the rod-shaped handle 3 or may be detachably installed.

The reinforcing bar pressing body 5 may be a rotating roller 5a which is rotatably attached to the rod-shaped handle 3 by a shaft 4 and is fixed to the shaft.

The reinforcing bar pressing body 5 is in contact with the reinforcing bar A and has a contact surface 5a.
Is a projecting arcuate surface, and the projecting arcuate contact surface 5a is preferably provided with flanges 5c on its left and right sides.

In the reinforcing bar pressing body 5 of the bar-shaped handle 3, when the reinforcing bar A is bent, the contact surface 5b with the reinforcing bar A has a size corresponding to the thickness of the reinforcing bar A and the size of the radius of the bent part of the reinforcing bar A. It is good that it can be exchanged for one.

The rebar supporting portion 2 has a space L corresponding to the thickness of the rebar A to be supported between the left supporting body 2a and the right supporting body 2b and can be replaced with the bar-shaped base 1. Or the left feed screw of the left support part 7a and the right support part 7b provided on the left side and the right part of the pedestal 7 while supporting the left pedestal 2a and the right pedestal 2b on the pedestal 7. 8a and the right feed screw 8b are engaged with the left support body 2a and the right support body 2b, respectively, and the left support body 2a and the right support body are driven by the rotation of the left feed screw 8a and the right feed screw 8b. body
2b continuously widens the gap L or makes a narrow gap or the like, and thereby the thickness of the rebar that holds the gap L between the left support member 2a and the right support member 2b in the rebar support unit 2 is increased. It is possible to set the width to suit the size.

[0012]

When the reinforcing bar A exposed from the concrete is bent in a reinforced concrete structure under construction, the reinforcing bar bending tool of the present invention is used in the state shown in FIG.
The operator holds the gripping portion 1a of the rod-shaped base 1 and the gripping portion 3a of the rod-shaped handle 3 so that the bar is facing downward, and the rebar A between the left support body 2a and the right support body 2b of the rebar support portion 2 Holding the bent portion slightly below and contacting the bent portion with the side of the reinforcing bar pressing body 5 of the rod-shaped handle 3, the rod-shaped handle 3 is moved toward the concrete B side around the shaft 4 as shown in FIG. When the rebar A is tilted while being rotated, the rebar A is held by the rebar support portion 2 and a large bending force is applied to the contact portion with the rebar pressing body 5 so that the rebar A can be bent even with a considerably thick rebar A. Since this bending limits the reinforcing bar to 90 degrees in both the left and right directions, when bending it further, remove the reinforcing bar A from the reinforcing bar supporting portion 2 and return the bar-shaped handle 3 to the initial position to re-install the reinforcing bar A again. It is preferable that the upper portion of the bent portion C is engaged with the reinforcing bar supporting portion 2 and adjusted so that the reinforcing bar pressing body 5 abuts at a desired position, and then the rod-shaped handle 3 is rotated to bend the bar-shaped handle 3 into a desired shape.

The bending direction of the reinforcing bar A is determined by the contact position between the reinforcing bar A and the reinforcing bar pressing body 5. That is, when the reinforcing bar A is bent to the left, it is preferable that the reinforcing bar A is brought into contact with the left side of the reinforcing bar pressing body 5 of the bar-shaped handle 3 and the bar-shaped handle 3 is tilted leftward.
Further, when it is desired to bend the reinforcing bar A to the right, the reinforcing bar A is brought into contact with the side of the reinforcing bar pressing body 5 of the bar-shaped handle 3 and the bar-shaped handle 3 is pressed.
Reinforcing bar A can be bent to the right by tilting to the right.

The reinforcing bar pressing body 5 that abuts against the reinforcing bar A and presses the reinforcing bar A, even if the bar-shaped handle 3 is provided with a protrusion,
However, in this method, when the reinforcing bar pressing body 5 comes into contact with the reinforcing bar A and begins to bend it, the bending part C of the reinforcing bar A moves while rubbing the reinforcing bar contact surface of the reinforcing bar pressing body 5. Therefore, the frictional resistance is large and the rotation of the rod-shaped handle 3 is heavy, and the reinforcing bar pressing body 5 is worn out too much. However, if the space between the reinforcing bar A and the reinforcing bar pressing body 5 is lubricated during the bending operation, a slight slip occurs. To improve

When the contact surface 5b of the reinforcing bar pressing body 5 with the reinforcing bar A is formed in a projecting arc shape, the contact area with the reinforcing bar A is reduced, friction resistance is reduced, the rotation of the rod-shaped handle 3 is lightened, and the reinforcing bar pressing body 5 is rotated. The pressing force concentrates on the reinforcing bar A and makes it easier to bend.
Also in this case, lubrication will increase the lightness.

However, in the above-mentioned reinforcing bar pressing body 5, the wear is large at all, and even if lubrication is carried out, it is not a sufficient measure, and if this can be detachably attached to the rod-shaped handle 3 and replaced, the parts due to the wear In addition to the replacement, the contact surface 5b can be replaced with one having a different shape or size, and the mounting position of the reinforcing bar pressing body 5 to the rod-shaped handle 3 can be changed in the longitudinal direction of the rod-shaped handle 3. The radius of the bent portion C of the reinforcing bar A can be changed by changing the attachment position of the reinforcing bar pressing body 5 positioned on the rod-shaped handle 3 and changing the contact position of the bent portion C of the reinforcing bar A. .

When the reinforcing bar pressing body 5 is the roller 5a, when the reinforcing bar A is bent, the roller 5a abuts on the reinforcing bar A, and when this is bent, the roller 5a moves on the reinforcing bar while rotating. Since A is bent, the roller 5a will rotate more smoothly if it is lightly rotated with a small frictional resistance and lubricated.
The life can be extended.

The reinforcing bar pressing body 5 including the roller 5a is provided with the flanges 5c on the left side and the right side of the contact surface 5b with the reinforcing bar A, so that when the reinforcing bar A is bent, the reinforcing bar A has a flange 5c. It can be bent so as not to come off the roller 5a.

The reinforcing bar pressing body 5 includes the reinforcing bar A including the roller 5a.
Flange 5c provided on both left and right sides of the contact surface 5b with
By making it possible to replace with the ones having different intervals so that the intervals correspond to the thickness of the reinforcing bar A, the roller 5a and the reinforcing bar A are engaged under the best condition so that the reinforcing bar A does not come off from the roller 5a. To

In the bending of the reinforcing bar A, when the curved portion C is bent to have a different radius, the gap between the reinforcing bar supporting portion 2 and the contact surface 5b of the roller 5a which is the reinforcing bar pressing body 5 with the reinforcing bar. Among the rollers 5a having different diameters, those corresponding to the above-mentioned desired intervals are set by setting them on the bar-shaped handle 3, and bending of the reinforcing bar having a desired radius is performed.

In the reinforcing bar support portion 2 which holds the reinforcing bar A, if the interval L between the left supporting part 2a and the right supporting part 2b constituting the reinforcing bar A is fixed at a fixed interval, the reinforcing bar A supported by this is fixed. If the thickness of the rebar changes significantly, it will be difficult to hold it, so it can only be used for those that do not change the thickness of the bending rebar A, but this adjusts the distance L between the left support part 2a and the right support part 2b. Even if the thickness of the reinforcing bar A changes as a result of being able to do so, the interval L is correspondingly changed and adjusted, so that the reinforcing bar A is always supported accurately.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the reinforcing bar bending tool of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a rod-shaped base body made of a steel plate having a width of 4 cm, a thickness of 0.5 cm and a length of 70 cm, and 2 denotes a reinforcing bar support portion for supporting a reinforcing bar provided at a tip portion of the bar-shaped base body 1.

The reinforcing bar support portion 2 is on the tip portion of the rod-shaped base 1 and has a width of 1.2 cm, a height of 2.5 cm, and a length of 5.5 on the left and right sides in the longitudinal direction of the rod-shaped base 1. Since the left support body 2a and the right support body 2b made of steel material of cm are made to face each other with the reinforcing bar engaging groove 10 of the interval of 1.5 cm therebetween to have a U-shaped cross section, the reinforcing bar supporting part 2 is Reinforcing bars up to 1.5 cm thick can be received in the reinforcing bar engaging groove 10. In the embodiment, the reinforcing bar supporting portion 2 has a fixed distance L, so that it is possible to support a thinner reinforcing bar than 1.5 cm, but a thicker reinforcing bar cannot be supported. Therefore, the left supporting body 2a If the distance between the right support member 2b and the right support member 2b can be changed, it is possible to freely support from a thick to a thin one, and this interval adjustment may be changed stepwise. Alternatively, the interval may be changed continuously without any step such as a vise, and the point is not limited to the embodiment as long as the reinforcing bars of various thicknesses can be accurately and surely supported.

Reference numeral 3 denotes a bar-shaped handle made of a steel plate having a width of 4 cm, a thickness of 0.5 cm and a length of 62 cm. The bar-shaped handle 3 is overlapped on the bar-shaped base 1 and its tip portion is near the reinforcing bar supporting portion 2 of the bar-shaped base 1. The rod-shaped handle 3 is rotatably and axially fixed to the rod-shaped base 1 by the shaft 4.

The rod-shaped base body 1 and the rod-shaped handle 3 described above.
Each of the base portions is a gripping portion 1a and a gripping portion 3a, which are bent in a stepwise manner in opposite directions.

The rod-shaped base 1 and the rod-shaped handle 3 have lengths of 70 cm and 62 cm, but the lengths are not limited to the examples, and may be longer or shorter. The point is that the length of the reinforcing bar can be easily bent.

Reference numeral 5 denotes a reinforcing bar pressing member for contacting and bending the reinforcing bar. In the embodiment, a roller-like roller 5a having a flange 5c on each of the left side and the right side of the contact surface 5b with the reinforcing bar is a rod-shaped handle. Reinforcing bar support portion 2 of rod-shaped base 1 at the tip end portion on 3
It is rotatably locked to the bar-shaped handle with a screw-shaped stop shaft 6 at a position about 5 cm from the end of the.

Since the roller 5a is detachably locked to the rod-shaped handle 3 by a screw-shaped stop shaft 6, when the reinforcing bars having different radiuses at the bent portion are bent, they are different from each other in diameter. Just replace it. That is, the roller 5c of the embodiment has a diameter of 4 cm, but in order to bend the reinforcing bar with a small radius, it is sufficient to replace it with a roller having a larger diameter, for example, a roller with a diameter of 6 cm, and conversely to bend the reinforcing bar with a large radius. At this time, for example, a roller having a diameter of 3 cm may be exchanged.

The reinforcing bar bending tool of the present invention, as described above,
It is used when bending the reinforcing bars implanted in the building at the work site as needed. In addition, at the processing site of the reinforcing bars, the rod-shaped base body 1 is laid horizontally on the work table and fixed with pegs or the like. It can also be used.

Reference numeral 12 is a nail hole formed in the body of the rod-shaped base 1.

[0032]

According to the reinforcing bar bending tool of the present invention as set forth in claim 1, when a reinforcing bar embedded in concrete is bent at a work site of a building or a structure constructed by reinforced concrete, the bending of the reinforcing bar is performed. Can be bent easily by a simple operation and does not need to be done by a skilled craftsman as in the past. Moreover, this bending work can be done independently by one worker, and the bending work of the reinforcing bar is more efficient than the conventional work that was said to have a low work efficiency. Is something that can be done.

According to the second aspect of the invention, the reinforcing bar pressing body 5 can be repaired when it is worn or damaged during bending of the reinforcing bar, replacement with a new one, and parts inspection.

According to the third aspect of the present invention, when the contact surface 5b of the reinforcing bar pressing body 5 for contacting the reinforcing bar is formed in a projected arc shape, the contact area between the reinforcing bar and the contact surface 5b is reduced and the frictional resistance is reduced. It is possible to reduce the number of rod-shaped handles 3 and rotate them easily.

According to the invention as set forth in claim 4, since the reinforcing bar pressing body 5 is composed of the rotatable roller 5a, the roller 5a moves on the reinforcing bar while rotating in contact with the reinforcing bar, so that the friction resistance is further reduced. The rod-shaped handle 3 can be rotated more easily.

According to the invention as defined in claim 5, the reinforcing bar pressing body 5 including the roller 5a is provided with the flanges 5c on the left part and the right part of the contact surface 5b for contacting the reinforcing bar. It fits well in the body 5, and it becomes difficult for the reinforcing bar to come off the reinforcing bar pressing body 5 during bending of the reinforcing bar, so that stable supporting of the reinforcing bar can be carried out.

According to the invention as defined in claim 6, since the rebars having different thicknesses are used depending on the place of use and the degree of bending is not constant, a desired bending can be made corresponding to these rebars. As shown in the figure, those that can change the distance between the contact surface and the reinforcing bar support, for example, those with different diameters of the roller 5a are selected, and the one most suitable for bending the reinforcing bar is selected and installed on the bar handle. can do.

According to the invention as defined in claim 7, the left support member 2a and the right support member 2b are provided with an interval suitable for the thickness of the reinforcing bar which bends the reinforcing bar supporting part 2 which holds the reinforcing bar when the reinforcing bar is bent. If it can be exchanged with one having, the rebar can be accurately and surely supported and can be bent with high accuracy.

According to the invention as set forth in claim 8, in the reinforcing bar supporting portion 2 for holding the reinforcing bar, the left supporting body 2a and the right supporting body 2b sandwiching the reinforcing bar work like a vise on the receiving table 7. If the distance between the two can be adjusted steplessly with a feed screw, the holding interval of the reinforcing bar can be easily adjusted with high accuracy, and the reinforcing bar supporting portion 2 can be configured in accordance with the thickness of the reinforcing bar.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a reinforcing bar bending tool according to the present invention,

FIG. 2 is a view showing an embodiment of a reinforcing bar bending tool according to the present invention,

FIG. 3 is an enlarged sectional view taken along line II-II of FIG.

4 is an enlarged sectional view taken along line III-III of FIG.

FIG. 5 is an enlarged cross-sectional view showing a second embodiment of the reinforcing bar support portion,

FIG. 6 is a front view of only a reinforcing bar supporting portion showing a third embodiment of the reinforcing bar supporting portion;

7 is a sectional view taken along line VV of FIG.

FIG. 8 is a diagram showing an example of how to use the reinforcing bar bending tool of the present invention;

FIG. 9 is a perspective view of a conventional reinforcing bar curved bar,

FIG. 10 is a diagram showing a bending example of a reinforcing bar implanted in a building,

FIG. 11 is a diagram showing an example of a method for bending a reinforcing bar using a conventional reinforcing bar curved bar.

[Explanation of symbols]

 1 bar base 2 rebar support 2a left support 2b right support 3 bar handle 4 shaft 5 rebar pressing 5a rotating roller 5b contact surface 5c flange 6 stop shaft 7 cradle 7a left support 7b right support 8a Left feed screw 8b Right feed screw 9 Base 10 Reinforcing bar engaging groove 12 Nail hole A Reinforcing bar B Concrete C Bending part L Interval

Claims (8)

[Scope of utility model registration request] 1. A left support member 2a and a right support member 2b are provided on the left and right sides of the tip of the rod-shaped base 1, and a reinforcing bar A is provided between the left support member 2a and the right support member 2b. Reinforcing bar support portions 2 are provided so as to project at an interval L that can be supported, and the tip end portion of the rod-shaped handle 3 is rod-shaped with the shaft 4 on the rod-shaped base body 1 on the side of the gripping portion 1a following the reinforcing bar support portion 2. The handle 3 is rotatable about the rod-shaped base 1 and is axially fixed to the rod-shaped base 1. Further, a reinforcing bar pressing body 5 is provided at a tip end portion of the rod-shaped handle 3 near the grip 4a near the shaft 4. Bending tool. 2. The reinforcing bar bending tool according to claim 1, wherein the reinforcing bar pressing body 5 is detachably attached to the bar-shaped handle 3. 3. The reinforcing bar pressing body 5 is a contact surface 5b for contacting the reinforcing bar A.
Is a projected arcuate surface, The reinforcing bar bending tool according to claim 1 or 2, characterized in that. 4. The reinforcing bar pressing body 5 comprises a rotating roller 5a, and the rotating roller 5a is detachably engaged with the rod-shaped handle 3 by a stop shaft 6,
The reinforcing bar bending tool according to 2 or 3. 5. The pressing body 5 is provided with a flange 5c on each of a left side portion and a right side portion of an abutting surface 5b that abuts on the reinforcing bar A, respectively. Rebar bending tool. 6. The reinforcing bar pressing body 5 is of such a size that the projecting arcuate contact surface 5b has a size corresponding to the thickness of the reinforcing bar which is in contact with the protruding surface 5b and the radius of the bent portion of the reinforcing bar. The reinforcing bar bending tool according to claim 1, wherein the reinforcing bar bending tool is replaceable and installed. 7. The reinforcing bar supporting portion 2 has an interval L corresponding to the thickness of the reinforcing bar A to be supported between the left supporting body 2a and the right supporting body 2b, and moreover with respect to the rod-shaped base body 1. The reinforcing bar bending tool according to claim 1, wherein the reinforcing bar bending tool is replaceable and installed. 8. The reinforcing bar supporting portion 2 is supported on the receiving base 7 while the left supporting body 2a is engaged with the left feed screw 8a provided on the left supporting portion 7a of the receiving base 7 and the right supporting body 2a. The body 2b is configured to be supported on the pedestal 7 by engaging with the right feed screw 8b provided on the right support body 2b of the pedestal 7, and by the rotation of the left feed screw 8a and the right feed screw 8b. 2. The reinforcing bar bending tool according to claim 1, wherein the distance L between the left supporting member 2a and the right supporting member 2b can be freely adjusted according to the thickness of the reinforcing bar.