JP2003053428A - Tool for straightening bend of bar-shaped member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and efficiently straighten a bent bar-shaped member so that its axial center takes a smooth linear shape. SOLUTION: This tool straightens a bar-shaped member A so that its axial center Y becomes linear. Two reaction force receiving members 1 which support both end sides of the bar-shaped member simply and a pressing member 2 which presses the bar-shaped member simply supported by these reaction force receiving members in the middle position between the reaction force receiving members so that the reaction forces act on the reaction force receiving members are provided on a freely transportable base material. A groove 32 to which the bar-shaped member simply supported with the reaction force receiving member enters from the radial direction is linearly formed and provided on the pressing surface 31 of the pressing member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening tool for a rod-shaped member, which straightens the rod-shaped member so that its axis is straight.

[0002]

2. Description of the Related Art For example, in order to bury a pipe such as a gas conduit in the ground without cutting, a propelling rod (an example of a rod-shaped member) having a substantially circular cross section is propelled while rotating in the ground. A construction method in which the entire length of the embedding area is inserted into the ground, a pipe is connected to one end of the propulsion rod, and the propulsion rod is pulled out from the ground while pulling the pipe into the extraction mark and buried in the ground. It has been known.

In such a construction method, if the propelling rod bends while hitting a hard rock or the like while being propelled and moved in the ground, the propelling movement becomes impossible, and the bent propelling rod is grounded. It is necessary to pull it out from the inside and straighten it so that its axis is straight.

In such a case, conventionally, the bent propulsion rod is carried to a facility such as a factory where a bending machine for pressing and bending a rod-shaped member such as a reinforcing bar with a bending pressing member is installed. The bending machine is diverted to a straightening tool, and the propelling rod is straightened so that its axial center becomes linear.

In the bending machine, a rod-shaped member having a straight axis is machined into a predetermined curved shape, and the pressing surface of the bending-use pressing member is an arc curved outward along the longitudinal direction of the bar-shaped member. It is formed in a planar shape, and one of the pressing surfaces is pressed against the outer peripheral surface of the rod-shaped member supported by the reaction force receiving member so that it can be processed into a predetermined curved shape.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since it is carried to a facility where a bending machine is installed and straightened, there is a drawback that it cannot be straightened quickly.

Further, since the bending machine is diverted and straightened, the curved rod-shaped member is supported by the reaction force receiving member, and one portion of the arc-shaped pressing surface is provided on the outer peripheral side of the bent portion. Since it is pressed and straightened so that the shaft center becomes linear, until the shaft center of the rod-shaped member returns to a straight line, the pressing surface comes in contact with the curved point, and the pressing force is at one point of the curved point. There is a drawback that it is difficult to correct the curved rod-shaped member so that the axis of the curved rod-shaped member becomes a smooth straight line.

In order to solve this drawback, it is conceivable that the pressing position of the pressing surface with respect to the bent portion is gradually changed to correct the rod-shaped member so that its axial center becomes a smooth straight line. In this case, there is a drawback that the rod-shaped member cannot be corrected efficiently.

The present invention has been made in view of the above circumstances, and an object of the present invention is to enable a bent rod-shaped member to be quickly and efficiently corrected so that its axis becomes a smooth straight line. And

[0010]

According to a first aspect of the present invention, there is provided a bending correction tool for a rod-shaped member, which straightens the rod-shaped member so that its axial center becomes linear, and both ends of the rod-shaped member are corrected. The two reaction force receiving members capable of simply supporting the member and the rod-shaped member simply supported by the reaction force receiving members are provided between the reaction force receiving members so that the pressing reaction force acts on the reaction force receiving members. A pressing member that can be pressed at an intermediate position is provided on a transportable base material, and the pressing surface of the pressing member is linearly formed with a groove into which a rod member simply supported by the reaction force receiving member enters from the radial direction. It is formed and provided.

[Operation] At both ends of the bent rod-shaped member, the bent portion is located at an intermediate position between the reaction force receiving members,
While simply supporting the reaction force receiving members with the two reaction force receiving members, the pressure member presses the outer peripheral side of the bent portion so that the reaction force receiving force acts on the reaction force receiving members, and the rod-shaped member has a straight axis. Although it can be corrected so that it becomes like a shape, since the bending correction tool is configured by providing the two reaction force receiving members and the pressing member on the transportable base material, the bending when the rod-shaped member bends It is possible to easily carry the bending correction tool into the field of use of the rod-shaped member so that the bending correction can be performed quickly.

Further, since the pressing surface of the pressing member is formed by forming a linear groove into which the rod-shaped member simply supported by the reaction force receiving member enters from the radial direction, the bent portion of the rod-shaped member and the pressing surface are provided. The contact length of the rod-shaped member along the longitudinal direction of the rod-shaped member increases as the axis of the rod-shaped member returns to the linear shape, and the pressing force of the pressing member can be dispersed and acted on the rod-shaped member.

[Effect] Since the bending correction tool can be carried in to the site where the rod-shaped member is used, when the rod-shaped member is bent, it can be quickly corrected at the site where the rod-shaped member is used. Further, since the pressing force can be applied to the rod-shaped member in a dispersed manner, the rod-shaped member can be efficiently corrected so that the axis of the rod-shaped member becomes a smooth straight line.

According to a second aspect of the present invention, each of the reaction force receiving members is formed of an idle roller, and the rod-shaped member is simply supported by the peripheral surface of the idle roller. In point.

[Operation] The rod-shaped member simply supported by the reaction force receiving member moves in the longitudinal direction of the rod-shaped member with respect to the reaction force receiving member as the axis of the bent portion returns to the linear shape. However, since each of the reaction force receiving members is constituted by an idler roller and the rod-shaped member is simply supported by the peripheral surface of the idler roller, the rod-shaped member is supported by the reaction force receiving member. It can be moved smoothly.

[Effect] The pressing force of the pressing member can be efficiently applied to the rod-shaped member as a correction pressing force.

According to a third aspect of the present invention, the pressing member is an operating member that presses the pressing member.
The rod-shaped member simply supported by the reaction force receiving member is swingably supported along the longitudinal direction.

[Operation] While pressing the rod-shaped member simply supported by the reaction force receiving member with the pressing member, the pressing member is extended in the longitudinal direction of the rod-shaped member so that the pressing surface is along the outer peripheral side of the bent portion of the rod-shaped member. It can be swung along the direction.

[Effect] According to the bent shape of the bent portion of the rod-shaped member, the pressing force can be effectively applied to the bent portion.

According to a fourth aspect of the present invention, each of the reaction force receiving members is formed in a cylindrical shape having a substantially constant radius, and the reaction force receiving members are provided on the base material so that their axes are substantially vertical. It is configured to simply support the rod-shaped member on its peripheral surface,
An adjusting tool for adjusting the supporting height of the rod-shaped member by the reaction force receiving member is provided corresponding to each reaction force receiving member.

[Operation] Since the bent rod-shaped member is corrected while being sandwiched between the pressing surface of the pressing member and the two reaction force receiving members, the contact positions of these three positions with respect to the rod-shaped member are specified in advance. And the two-dimensionally bent rod-shaped member along the plane including the specific contact positions at those three positions, while maintaining the corrective posture in which the outer peripheral side of the bent part faces the pressing direction upper side. Although it can be easily sandwiched, the three-dimensionally bent rod-shaped member has a problem that it is difficult to be sandwiched at these three positions while maintaining a corrective posture.

Therefore, each of the reaction force receiving members is formed in a cylindrical shape having a substantially constant radius, and is configured to simply support the rod-shaped member at any position in the width direction of its peripheral surface. The reaction force receiving member is provided with a degree of freedom in its contact position, and the cylindrical reaction force receiving member is provided on the base material so that the axis of the reaction force receiving member is substantially vertical to support the rod-shaped member from the horizontal direction. Since an adjusting tool for adjusting the support height of the rod-shaped member by the reaction force receiving member is provided corresponding to each reaction force receiving member, even a rod-shaped member bent in three dimensions,
It is possible to easily sandwich the bent portion at the three positions of the pressing surface of the pressing member and the two reaction force receiving members while maintaining the corrective posture in which the outer peripheral side faces the upper side in the pressing direction.

[Effect] Even a three-dimensionally bent rod-shaped member can be easily corrected so that its axial center becomes linear.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a straightening tool for a rod-shaped member that straightens a propulsion rod (an example of a rod-shaped member) A having a substantially circular transverse cross-section so that its axis Y becomes linear.

As described above, the propulsion rod A is connected to a plurality of rods according to the length of the embedding area in order to bury a pipe such as a gas conduit in the ground without digging. While propelling and moving it, it is inserted into the ground over the entire length of the buried area. The axis Y can be straightened so as to be straight.

The bending correction tool presses two reaction force receiving members 1 capable of simply supporting both ends of the bending propulsion rod A and the bending propulsion rod A simply supported by the reaction force receiving members 1. A pressing member 2 capable of pressing at an intermediate position between the reaction force receiving members 1 so that the reaction force acts on the reaction force receiving member 1,
The actuating device 3 for actuating the pressing member 2 is provided on the base material 4 which is laterally long and frame-shaped and can be carried in a side view, so that it can be easily carried into the site where the propulsion rod is used.

The base member 4 has a plate-shaped lower guide frame 6 fixed to the front and rear pedestals 5, spacers 7a and 7b fixed to both ends of the lower guide frame 6, and one of the spacers 7a. The upper guide frame 8 is supported so as to be vertically swingable, and a fixing member 9 for pressing and fixing the upper guide frame 8 to the spacer 7b side is rotatably provided on the other spacer 7b to form a horizontally long frame shape. By bending the upper guide frame 8 upward, the bending propelling rod A can be set.

Each of the reaction force receiving members 1 is mounted on a roller support case 10 which is detachably attached to the lower guide frame 6, and a cylindrical idler roller 11 having a substantially constant radius.
The bending propelling rod A is simply supported by the peripheral surface of the idler roller 11, and as the axis Y of the bending propelling rod A returns to a straight line, the bending propelling rod A is bent. Is designed to move smoothly with respect to the idler roller 11.

As shown in FIG. 3, the roller support case 10 is provided with four through holes 12 for attaching idle rollers at symmetrical positions, and two roller support brackets 13 each having a substantially triangular shape in plan view. Are fixed to each other with a spacer 14 sandwiched therebetween, and two through holes 12 having a bilaterally symmetrical positional relationship are selected in accordance with the bending condition and length of the bending propulsion rod A, and Idling roller 11 in through hole 12
Is rotatably supported.

Then, the two shaft members 16 erected on the lower guide frame 6 are removably fitted into the two fixing through holes 15 formed over the respective roller supporting brackets 13, and the respective roller supporting members are supported. The lower guide frame 6 and the upper guide frame 8 are fitted between a pair of guide plates 17 fixed to the bracket 13 so that the rotation axis of each idler roller 11 is substantially vertical. , And is detachably attached to the base material 4.

Of the two roller supporting brackets 13, the lower roller supporting bracket 13a positioned on the lower guide frame 6 side and assembled to the lower roller supporting bracket 13 is adjustable to adjust the supporting height of the bending propulsion rod A by the idle roller 11. Ingredient 1
8 is provided corresponding to each idler roller 11, and even in the case of the bending propulsion rod A which is bent three-dimensionally, the bending point is pressed by the pressing member 2 so that the axis Y becomes linear. It can be easily corrected.

In the adjusting tool 18, a bolt 20 is fixed to a mounting plate 19 on which the bending propulsion rod A is mounted, and the bolt 2
0 is screwed into the female screw portion 21 fixed to the lower roller support bracket 13a so that the supporting height of the bending propulsion rod A placed on the mounting plate 19 can be adjusted by rotating the mounting plate 19. is there.

In the actuating device 3, the actuating member 22 for actuating the pressing member 2 is connected to the piston rod 24 of the hydraulic cylinder 23, and when the hydraulic cylinder 23 expands and contracts, the upper guide frame 8 and the lower guide frame 6 are connected. Is provided so as to be slidable in the longitudinal direction of the guide frame along with, and the pressing member 2 supported by the operating member 22 is pressed by the expansion operation of the hydraulic cylinder 23. A unit 25 and a remote control type operation tool 26 for operating the hydraulic pump unit 25 are provided.

The operating member 22 is, as shown in FIG.
Upper guide 2 that fits on the lower surface side of the upper guide frame 8
7 and a lower guide 28 that fits on the upper surface side of the lower guide frame 6, and the pressing member 2 is supported between the upper guide 27 and the lower guide 28 so as to be horizontally swingable around the vertical axis X. The pressing member 2 is simply supported by the idler roller 11 so that a pressing force can be effectively applied to the bent portion of the bending propulsion rod A according to the bent shape of the bent portion. The propelling rod A is swingably supported along the longitudinal direction, and the convex portions 29 provided on the upper guide 27 and the lower guide 28 are caused to enter the concave portions 30 formed on the pressing member 2 to swing the pressing member 2. The range can be regulated.

The pressing surface 31 of the pressing member 2 has an arc-shaped groove 32 whose cross section is curved and has a diameter larger than that of the propelling rod A, and is linearly formed. The rod A is provided so as to enter from the radial direction,
As shown in FIG. 5, the support height of the bending propulsion rod A is adjusted by the left and right adjusters 18 so that the bending portion of the bending propulsion rod A enters the groove 32 of the pressing surface 31 and is pressed. The guide frame 8 is lifted, and the bending propulsion rod A is placed on the mounting plate 19 so that the outer peripheral side of the bending portion is located in the intermediate position between the idler rollers 11 in a posture in which the outer peripheral side of the bending portion is directed to the upper side in the pressing direction. A is set on the bending straightening tool, and both ends of the bending propelling rod A are simply supported by the two idle rollers 11, while the outer peripheral side of the bending portion is pressed by the pressing member 2 to move the bending propelling rod A The axis Y can be straightened so as to be straight.

Then, as shown in FIG. 6, the contact length along the rod longitudinal direction between the bent portion of the bending propulsion rod A and the pressing surface 31 is the same as the axis Y of the bending propulsion rod A returns to a straight line shape. The pressing force of the pressing member 2 can be dispersed and acted on the bending propelling rod A.

[Other Embodiments] 1. The bending correction tool for a rod-shaped member according to the present invention may be configured to press the rod-shaped member from above and below to correct it. 2. The bending correction tool for a rod-shaped member according to the present invention may be provided with a fixed reaction force receiving member that does not rotate. 3. The bending correction tool for a rod-shaped member according to the present invention may be a device for correcting a rod-shaped member having a polygonal column shape. 4. The straightening tool for a rod-shaped member according to the present invention forms a straight groove on the pressing surface of the pressing member, the rod-shaped member simply supported by the reaction force receiving member entering from the radial direction and having a U-shaped cross section. May be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a bending correction tool.

FIG. 2 is an exploded perspective view of the bending correction tool.

FIG. 3 is a perspective view of a main part.

FIG. 4 is a perspective view of a main part.

FIG. 5 is an explanatory diagram of how to use

FIG. 6 is an explanatory diagram of the operation

[Explanation of symbols]

1 Reaction force receiving member 2 Pressing member 4 base materials 11 Idler roller 18 Adjusters 22 Actuating member 31 Pressing surface 32 grooves A rod-shaped member X axis core Y axis core

Claims (4)

[Claims] 1. A bending correction tool for a rod-shaped member, which straightens the rod-shaped member so that its axis is linear, and two reaction force receiving members capable of simply supporting both end sides of the rod-shaped member, and two reaction force receiving members. The rod-shaped member simply supported by the reaction force receiving member, so that the pressing reaction force acts on the reaction force receiving member,
A pressing member that can be pressed at an intermediate position between the reaction force receiving members,
Straightening of the rod-shaped member, which is provided on a transportable base material, and in which the pressing surface of the pressing member is formed by linearly forming a groove into which the rod-shaped member simply supported by the reaction force receiving member enters from the radial direction Ingredient 2. The bending of the rod-shaped member according to claim 1, wherein each of the reaction force receiving members is constituted by an idler roller, and the rod-shaped member is simply supported by the peripheral surface of the idler roller. Corrector. 3. The pressing member is supported by an operating member for pressing the pressing member so as to be swingable along the longitudinal direction of a rod-shaped member simply supported by the reaction force receiving member. 1. A bending correction tool for a rod-shaped member according to 1 or 2. 4. The reaction force receiving member is formed in a cylindrical shape having a substantially constant radius, and is provided on the base material so that its axis is substantially vertical, and the rod-shaped member is simply supported by its peripheral surface. 4. The adjusting tool configured to adjust the supporting height of the rod-shaped member by the reaction force receiving member is provided corresponding to each reaction force receiving member. Straightening tool for rod-shaped members.