JPH04113112U - Rebar bending tool - Google Patents

Abstract

(57) [Summary] [Purpose] When bending reinforcing bars that protrude from the concrete during construction work of reinforced concrete buildings, etc., the bending tool is a lever type with a jig, so that the bending of the reinforcing bars is accurate. It can be done easily. [Structure] The rod-shaped handle 3 is attached to the rod-shaped base 1 at the tip of the rod-shaped base 1, which has a reinforcing bar support 2 that clamps the reinforcing bars at its tip, and continues to the reinforcing bar support 2. On the other hand, it is locked by a shaft 6 so that it can rotate freely, and a door wheel-shaped rotating roller 5a is supported by a stop shaft 6 at the tip of the rod-like handle 3 at a position facing the reinforcing bar support part 2.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on the reinforcing bars used when constructing reinforced concrete buildings and structures. , during the construction of a structure, the reinforcing bars exposed from the concrete can be shaped into the desired shape on the spot. This invention relates to a portable reinforcing bar bending tool that is simple and easy to bend.

0002

[Conventional technology]

Traditionally, reinforcing bars used in reinforced concrete buildings and structures are bent into desired shapes. Bending by power or human power to bend reinforcing bars installed in a designated workshop Many machines are used, and in addition, they are carried to construction sites and exposed from concrete. There is a hand-held tool shown in Fig. 9 that can be used to bend reinforcing bars.

0003

[Problem that the idea aims to solve]

Traditionally used reinforcing bar bending tools are powered by electric motors and oil as mentioned above. It may be a full-fledged large machine powered by a pressure motor, or it may be powered by human power. Even if the base is equipped with an amplifying device that is installed on a base or the like to increase manpower. These machines are similar to reinforcing bar bending machines, and they can be moved once they are installed on a base. Reinforcement bars that are difficult to move and exposed from structures on the work site can be bent on the spot. I can't really do that.

0004 By the way, at a work site, the reinforcing bars exposed from the concrete are bent. There are quite a lot of jobs involved, such as bending reinforcing bars using a large rebar bending machine like the one mentioned above. The finishing process is done by cutting downward reinforcing bar engagement grooves 10 into the base 9 as shown in Figure 9 at the assembly site. At the same time, a long handle 11 is provided on the side wall of the base 9 in a direction intersecting with the reinforcing bar engagement groove 10. The work is completed according to the drawing using two hand-operated tools as shown in Figure 11. Although these tasks may seem easy, they are quite tedious. The work requires skill and fatigue, which requires a lot of effort to bend the reinforcing bars. It is intense.

[0005] This invention solves the above-mentioned problems and allows for accurate bending of reinforcing bar A at the work site. To provide a reinforcing bar bending tool that can be easily and easily bent with little effort. This is a device that aims to.

[0006]

[Means to solve the problem]

In order to achieve the above-mentioned purpose, this invention aims to By protruding a left support 2a and a right support 2b with an interval L that can support the reinforcing bar A, A reinforcing bar support part 2 is provided, and following the reinforcing bar bearing part 2, a bar-shaped base 1 on the gripping part 1a side is provided. The tip of the rod-shaped handle 3 can be rotated with respect to the rod-shaped base 1. The shaft is fixed with the shaft 4 as shown in FIG. 5.

[0007] Even if the reinforcing bar pressing body 5 is fixed to the rod-shaped handle 3, it can be attached and detached freely. It may be installed with

[0008] The reinforcing bar pressing body 5 is a rotary shaft that is freely rotatable with respect to the rod-shaped handle 3 by a shaft 4. It may be a rolling roller 5a.

[0009] The reinforcing bar pressing body 5 has a contact surface 5a that comes into contact with the reinforcing bar A, and has a projecting arc shape. The contact surface 5a is preferably provided with flanges 5c on its left and right sides.

0010 The reinforcing bar pressing body 5 of the rod-shaped handle 3 has a contact surface 5b with the reinforcing bar A when bending the reinforcing bar A. The size corresponds to the thickness of reinforcing bar A and the radius of the bent part of reinforcing bar A. It would be good if it could be exchanged with

[0011] The reinforcing bar support part 2 has a spacing L corresponding to the thickness of the reinforcing bar A to be supported between the left support body 2a and the right support body. The one that has between the body 2b can be exchanged with the rod-shaped base 1, and the left The support body 2a and the right support body 2b are supported by the pedestal 7, and the support body 2a and the right support body 2b are supported on the left side and right side of the pedestal 7. Connect the left feed screw 8a and right feed screw 8b of the left support part 7a and right support part 7b to the left support body 2a and the right They are engaged with the support bodies 2b, respectively, and are driven by the rotation of the left feed screw 8a and right feed screw 8b. The moved left support body 2a and right support body 2b continuously widen or narrow the distance L between them. By performing operations such as It is possible to set the width to suit the thickness of the reinforcing bars to be clamped.

0012

[Effect]

In reinforced concrete structures that are under construction, etc., expose them from the concrete. When bending the reinforcing bar A, the reinforcing bar bending tool of the present invention is used in the state shown in Fig. The operator holds the grip part 1a of the rod-shaped base 1 and the grip part 3a of the rod-shaped handle 3 so that they are facing downward. is held, and the bending part of the reinforcing bar A is held between the left support 2a and the right support 2b of the reinforcing bar support part 2. While holding the lower part, the bent part is brought into contact with the side of the reinforcing bar pressing body 5 of the rod-shaped handle 3. Then, as shown in Fig. 8, move the rod-shaped handle 3 around the shaft 4 toward the concrete B side. When the reinforcing bar A is pushed down while being rotated, it is held between the reinforcing bar support part 2 and the reinforcing bar pressing body 5. Even fairly thick reinforcing bars A can be bent using a lever-based bending operation that applies a large bending force to the abutting part. can be given. And this bending is limited to 90 degrees in both left and right directions of the reinforcing bar. When bending more than that, remove the reinforcing bar A from the reinforcing bar support part 2 and Return the dollar 3 to the initial position and once again support the reinforcing bar above the bent part C of the reinforcing bar A. The rod-shaped bar is engaged with the receiving part 2 and adjusted so that the reinforcing bar pressing body 5 comes into contact with the desired position. It is preferable to rotate the handle 3 and bend it into a desired shape.

[0013] 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, reinforcing bar A When bending to the left, place the reinforcing bar A in contact with the left side of the reinforcing bar pressing body 5 of the rod-shaped handle 3. It is preferable to tilt the rod-shaped handle 3 toward the left. I also want to bend reinforcing bar A to the right. When the reinforcing bar A is brought into contact with the reinforcing bar pressing body 5 side of the bar-shaped handle 3, the bar-shaped handle is By tilting 3 toward the right side, reinforcing bar A can be bent to the right.

[0014] The reinforcing bar pressing body 5 that comes into contact with the reinforcing bar A and presses the reinforcing bar A is provided with a protrusion on the bar-shaped handle 3. Although it is possible to bend the reinforcing bar A even if the reinforcing bar is When it comes into contact with the reinforcing bar A and begins to bend it, the bent part C of the reinforcing bar A is brought into contact with the reinforcing bar of the reinforcing bar presser 5. Since the contact surface moves while rubbing, the frictional resistance is large and the rotation of the rod-shaped handle 3 is However, during the bending operation, the Applying oil between the reinforcing bar A and the reinforcing bar pressing body 5 will improve the slippage a little. Ru.

[0015] If the contact surface 5b of the reinforcing bar pressing body 5 with the reinforcing bar A is made into a projecting arc shape, the contact area with the reinforcing bar A is reduced. This reduces frictional resistance and makes the rotation of the rod-shaped handle 3 easier, as well as the reinforcing bar pressing body 5. The pressing force is concentrated on reinforcing bar A, making it easier to bend reinforcing bar A. In this case as well, lubricating the It increases lightness.

[0016] However, the reinforcing bar pressing body 5 as described above suffers from a large amount of wear, and it is difficult to lubricate it. However, this is not a sufficient countermeasure, and it can be replaced by attaching and detaching it freely to the rod-shaped handle 3. In addition to replacing parts due to wear and tear, if the contact surface 5b has a different shape or size, Furthermore, the reinforcing bar pressing body 5 can be replaced with the rod-shaped handle 3. The installation position can be changed in the longitudinal direction of the rod-shaped handle 3. By changing the mounting position of the reinforcing bar pressing body 5 located on the shaped handle 3, the bent part of the reinforcing bar is By changing the contact position of C, the radius of the bent portion C of the reinforcing bar A can be changed.

[0017] If the reinforcing bar pressing body 5 is a roller 5a, when bending the reinforcing bar A, the roller 5a will When contacting the reinforcement A and bending it, the roller 5a moves over the reinforcement while rotating and bends the reinforcement. Since it bends the muscle A, it rotates easily with little frictional resistance, and when lubricated, the roller 5a rotation can increase the smoothness and extend the service life.

[0018] The reinforcing bar pressing body 5 including the roller 5a has flanges on the left and right sides of the contact surface 5b with the reinforcing bar A. By providing each flange 5c, when bending the reinforcing bar A, the reinforcing bar A bends to the flange 5c during bending. It can be bent so as not to come off the roller 5a.

[0019] The reinforcing bar pressing body 5, including the roller 5a, is located at both left and right sides of the contact surface 5b with the reinforcing bar A. The spacing between the flanges 5c provided on By making it possible to exchange rollers 5a and reinforcing bar A, roller 5a and reinforcing bar A are engaged under the best conditions, and reinforcing bar A is locked. 5a.

[0020] When bending reinforcing bar A, when bending part C has a different radius, The distance between the contact surface 5b of the roller 5a, which is the reinforcing bar pressing body 5, with the reinforcing bar and the reinforcing bar support part 2 is defined as the diameter. Among the rollers 5a with different distances, those corresponding to the above desired spacing are installed on the rod-shaped handle 3. By doing this, the reinforcing bar with the desired radius is bent.

[0021] The reinforcing bar support part 2 that holds the reinforcing bar A is composed of a left support part 2a and a right support part 2b. If the spacing L is fixed at a constant interval, the thickness of the supporting reinforcing bars A will change greatly. This makes it difficult to clamp the reinforcing bar A, so it is only used when the thickness of the reinforcing bar A does not change much. Although it is not possible, here we have made it possible to adjust the distance L between the left support part 2a and the right support part 2b. Even if the thickness of reinforcing bar A changes with Accurately support reinforcing bar A.

[0022]

【Example】

An embodiment of the reinforcing bar bending tool of the present invention will be described based on the attached drawings.

[0023] 1 is a rod-shaped base made of a steel plate with a width of 4 cm, a thickness of 0.5 cm, and a length of 70 cm; 2 is a rod-shaped base This is a reinforcing bar support part for supporting the reinforcing bars provided at the tip of the steel bar 1.

[0024] This reinforcing bar support portion 2 is located on the tip end portion of the rod-shaped base 1 and extends over the length of the rod-shaped base 1. The left and right sides are made of steel with a width of 1.2 cm, a height of 2.5 cm, and a length of 5.5 cm. The left support body 2a and the right support body 2b are placed facing each other with a reinforcing bar engagement groove 10 having a spacing of 1.5 cm. Since the cross section is U-shaped, this reinforcing bar support part 2 is made up of reinforcing bars with a maximum thickness of 1.5 cm. It can be supported by the muscle engagement groove 10. This reinforcing bar support part 2 is thinner than the 1.5 cm reinforcing bar because the spacing L is fixed in the example. Although it can support heavy objects, it cannot support thicker rebar. If the distance between the left support member 2a and the right support member 2b can be changed, it is thick. It can be used to support anything from small to thin objects, and the spacing can be adjusted in stages. It may be a device that changes the interval steplessly and continuously, such as a vise. In short, it can be carried out as long as it can accurately and reliably support reinforcing bars of various thicknesses. This is not limited to examples.

[0025] 3 is a rod-shaped handle made of a steel plate with a width of 4 cm, a thickness of 0.5 cm, and a length of 62 cm. The handle 3 overlaps the rod-shaped base 1 and its tip portion is attached to the reinforcing bar support portion 2 of the rod-shaped base 1. Nearby, a rod-shaped handle 3 is rotatably fixed to the rod-shaped base 1 by a shaft 4. It is.

[0026] The base portions of the rod-shaped base 1 and the rod-shaped handle 3 are arranged in opposite directions. It is bent stepwise to form a gripping portion 1a and a gripping portion 3a.

[0027] The rod-shaped base 1 and the rod-shaped handle 3 have lengths of 70 cm and 62 cm. is not limited to the examples, and may be longer or shorter than this. The length may be sufficient as long as the reinforcing bar can be easily bent.

[0028] 5 is a reinforcing bar pressing body that comes into contact with the reinforcing bars to bend the reinforcing bars; A door wheel-shaped roller 5a having flanges 5c on the left and right sides of the contact surface 5b is mounted on a bar-shaped roller 5a. Insert a screw at the tip of the handle 3 at a position approximately 5 cm from the end of the reinforcing bar support part 2 of the rod-shaped base 1. It is rotatably locked to a rod-shaped handle using a locking shaft 6.

[0029] The above-mentioned roller 5a is detachably locked to the rod-shaped handle 3 by a screw-shaped stop shaft 6. Therefore, when bending reinforcing bars with different radii at the bending part, rods with different diameters are used. You can replace it with a . In other words, the roller 5c in the example has a diameter of 4 cm, but the reinforcing bar is small. A roller with a diameter larger than this, for example a roller with a diameter of 6 cm, is bent with a small radius. On the other hand, if you want to bend the reinforcing bar with a large radius, for example, use a diameter of 3. Just replace it with a cm roller.

[0030] As mentioned above, the reinforcing bar bending tool of this invention can be used to It is used to bend the reinforcing bars as necessary, but it is also used at reinforcing bar processing sites. It is also possible to use the bar-shaped base 1 by placing it horizontally on a workbench and fixing it with a peg or the like. Ru.

[0031] 12 is a nail hole provided in the body of the rod-shaped base 1.

[0032]

[Effect of the idea]

According to the reinforcing bar bending tool of the present invention as set forth in claim 1, At work sites for buildings and structures where When bending, this reinforcing bar can be easily bent with simple operations. Therefore, it does not have to be done by skilled craftsmen as in the past. Moreover, this bending process Bending of reinforcing bars is something that can be processed independently by one worker. The bending process is more efficient than the conventional method mentioned above, which was considered to have low work efficiency. It is possible.

[0033] According to the invention described in claim 2, the reinforcing bar pressing body 5 prevents wear and tear during bending of reinforcing bars. If the product is damaged, we can repair it, replace it with a new one, or inspect the parts.

[0034] According to the invention described in claim 3, the contact surface 5b of the reinforcing bar pressing body 5 that comes into contact with the reinforcing bar is formed into a projecting arc. If the reinforcing bars are kept in the shape of The shaped handle 3 can be easily rotated.

[0035] According to the invention described in claim 4, the reinforcing bar pressing body 5 is composed of a rotatable roller 5a. Since the roller 5a is in contact with the reinforcing bars and moves over the reinforcing bars while rotating, friction occurs. The resistance is further reduced and the rod-shaped handle 3 can be rotated more easily.

[0036] According to the invention described in claim 5, the reinforcing bar pressing body 5 including the roller 5a comes into contact with the reinforcing bar. By providing flanges 5c on the left and right parts of the contact surface 5b, the reinforcing bars can be pressed easily. The reinforcing bars fit well into the reinforcing bar body 5 and are difficult to come off from the reinforcing bar pressing body 5 during bending of the reinforcing bars. This allows for stable support of reinforcing bars.

[0037] According to the invention recited in claim 6, reinforcing bars with different thicknesses can be used depending on the location where they are used. Furthermore, since the degree of bending is not constant, it is necessary to Items that allow you to change the distance between the contact surface and the reinforcing bar support so that the desired bending can be achieved, such as rods. Prepare rollers 5a with different diameters and choose the one most suitable for bending reinforcing bars. You can select and install it on a rod-shaped handle.

[0038] According to the invention described in claim 7, the reinforcing bar support part that holds the reinforcing bars when bending the reinforcing bars. The left support body 2a and the right support body 2b have a spacing suitable for the thickness of the reinforcing bars that bend 2. By making it possible to replace the reinforcing bar with the steel bar, the reinforcing bar can be supported accurately and reliably, allowing for precise bending. It is something.

[0039] According to the invention described in claim 8, the reinforcing bars are held in the reinforcing bar support part 2 that clamps the reinforcing bars. The left supporting body 2a and the right supporting body 2b are placed between them on the pedestal 7, and the gap between them is adjusted like a vise by a feed screw. By allowing stepless adjustment, you can accurately adjust the spacing between reinforcing bars. The reinforcing bar support part 2 can be easily constructed and adapted to the thickness of the reinforcing bar.

[Brief explanation of drawings]

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

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

[Fig. 3] An enlarged cross-sectional view taken along the line II-II in Fig. 1;

[Fig. 4] Enlarged cross-sectional view taken along line III-III in Fig. 1;

FIG. 5 is an enlarged sectional view showing a second embodiment of the reinforcing bar support part;

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

[Fig. 7] Cross-sectional view taken along line V-V in Fig. 6;

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

[Fig. 9] A perspective view of a conventionally used reinforcing bar curved rod,

[Figure 10] Diagram showing an example of bending reinforcing bars embedded in a building,

FIG. 11 is a diagram illustrating an example of a method for bending reinforcing bars using a conventional reinforcing bar bending rod.

[Explanation of symbols]

1 Rod-shaped substrate 2 Reinforcement support part 2a Left support 2b Right support 3 Rod-shaped handle 4 axes 5 Rebar pressing body 5a rotating roller 5b Contact surface 5c flange 6 Stop shaft 7 cradle 7a Left support part 7b Right support part 8a Left feed screw 8b Right feed screw 9 Base 10 Rebar engagement groove 12 Nail hole A reinforcing bar B Concrete C Bend part L interval

Claims (8)

[Scope of utility model registration request] Claim 1: A left support member 2a and a right support member 2b are provided on the left and right sides of the tip portion 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. A reinforcing bar support part 2 is provided so as to protrude at a spacing L that can be supported, and the tip of a bar handle 3 is attached to the bar-shaped base 1 on the side of the gripping part 1a following the reinforcing bar bearing part 2 with a shaft 4. A reinforcing bar characterized in that a handle 3 is pivotably fixed to a rod-shaped base 1 so as to be rotatable, and a reinforcing bar pressing body 5 is provided at the tip of the rod-shaped handle 3 near a gripping part 3a near a 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 rod-shaped handle 3. Claim 3: The reinforcing bar pressing body 5 has a contact surface 5b that comes into contact with the reinforcing bar A.
The reinforcing bar bending device according to claim 1 or 2, wherein is a projecting arc-shaped surface. 4. The reinforcing bar pressing body 5 comprises a rotating roller 5a, and the rotating roller 5a is removably locked to the rod-like handle 3 by a stop shaft 6.
The reinforcing bar bending tool according to 2 or 3. 5. According to claim 1, 2, 3 or 4, the pressing body 5 is provided with flanges 5c on the left and right sides of the contact surface 5b which contacts the reinforcing bar A, respectively. Rebar bending device. 6. The reinforcing bar pressing body 5 has a projecting arc-shaped contact surface 5b of a size corresponding to the thickness of the reinforcing bar that comes into contact with it and the radius of the bent portion of the reinforcing bar, and is 6. The reinforcing bar bending tool according to claim 1, wherein the reinforcing bar bending tool is installed so as to be replaceable. 7. The reinforcing bar support part 2 has a spacing L between the left support body 2a and the right support body 2b corresponding to the thickness of the reinforcing bar A to be supported, and is The reinforcing bar bending device according to claim 1, characterized in that the reinforcing bar bending device is installed in a replaceable manner. 8. The reinforcing bar support part 2 is supported on the pedestal 7 by the left support body 2a engaging with the left feed screw 8a provided on the left support part 7a of the pedestal 7, and the right support part 2a is supported on the pedestal 7. The body 2b is 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 is rotated by the rotation of the left feed screw 8a and the right feed screw 8b. 2. The rebar bending tool according to claim 1, wherein the distance L between the left support member 2a and the right support member 2b can be freely adjusted according to the thickness of the rebar.