JP2002205117A - Corrector of channel width of steel member with channel-like section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrector of the channel width capable of efficiently correcting the deformation of the channel width with high accuracy which is caused when a steel member of channel section such as a longitudinal rib provided for reinforcement on a lower side of a steel slab of a bridge is subjected to the heating and bending operation. SOLUTION: A channel width expansion-corrector 7 is provided with an abutting member 21 which slides in the channel width direction and is abutted on the steel member 1 from the inside of the channel by a hydraulic cylinder 23 with respect to a body traveling inside the upwardly directed steel member 1 with the channel-like section in the longitudinal direction by a roller 8. A channel width reduction-corrector 31 is provided with an abutting member which slides in the channel width direction and is abutted on the steel member from the outside of the channel by a hydraulic cylinder 45 with respect to a body traveling on the channel edge in the longitudinal direction of the steel member 1 by a roller 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for correcting a groove width of a groove-shaped steel material represented by a U-shaped rib (U-shaped trough) used for a vertical rib for a steel deck of a bridge.

[0002]

2. Description of the Related Art For example, longitudinal ribs are provided on the lower surface of a steel floor plate of a bridge for reinforcement. In recent years, this vertical rib
A U-shaped rib (U-shaped trough) having a U-shaped cross section is used for weight reduction. Then, the U-rib is subjected to a bending process according to the shape of the bridge and the like. The bending process is mainly performed by a baking thermal processing method, and in this process, deformation other than the intended processing may be accompanied. Conventionally, the deformation in which the width of the U-shaped groove is expanded or contracted is corrected by hitting with a hammer from the outside or the inside of the groove.

[0003]

However, the conventional correction method, which hits with a hammer by human power, is inefficient and inaccurate. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an efficient and accurate groove width correcting apparatus for a steel material having a grooved cross section.

[0004]

In order to solve the above problems, a first invention is to extend the inside of an upwardly-facing groove into the longitudinal direction of a steel material in order to expand and correct the groove width of a steel material having a groove-shaped cross section. A main body that travels with rollers in the direction, a contact member that slides in the groove width direction with respect to the main body and abuts on the steel material from inside the groove, and a hydraulic cylinder that slides the contact member. It is a groove width straightening device for a groove-shaped cross-section steel material.

[0005] A second aspect of the present invention is to provide a main body which travels by rollers in the longitudinal direction of the steel material with an upwardly facing groove-shaped edge in order to reduce and correct the groove width of the steel material having a groove-shaped cross section; A groove width correcting apparatus for a steel material having a groove-shaped cross section, comprising: a contact member that slides in a width direction to contact the steel material from outside the groove; and a hydraulic cylinder that slides the contact member.

A third aspect of the present invention is further characterized in that there are two abutting members in the groove width direction, one of which is fixed to the main body and the other is slid, wherein the groove member is slid. Device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. The groove-shaped cross-section steel material to be corrected in this embodiment is a U-shaped trough-shaped rib having flanges 5 rising on both sides of a web 3 which is a groove-shaped bottom portion, that is, a U-rib 1 used for a vertical rib for a steel slab of a bridge. It is. This U
The ribs 1 may be subjected to a bending process according to a shape of a bridge or the like by a baking thermal processing method. This bending includes bending in the plane including the web 3 of the U-rib 1 or bending with a camber that makes the surface itself including the web 3 a curved surface. In these bending processes, a deformation may occur in which the width of the U-shaped groove is increased or reduced.

(Structure of Groove Width Expansion Correction Apparatus) FIGS. 1 and 2
Is a device for expanding and reducing the reduced groove width. A roller 8 that can travel inside the upward U-rib 1 while contacting the web 3 is provided on a main body 9. Two pairs of rollers 8 are provided before and after the main body 9, and are manually run by an operator.

A guide plate 13 is horizontally supported by the main body 9 via a support portion 11, and a rail plate 15 is fixed to a center of the guide plate 13. With the left and right ends (the groove width direction of the U-rib 1) of the rail plate 15 sandwiched therebetween, slide plates 17 and 19 having a U-shaped planar shape are slidably fitted with thick portions. And placed. The contact members 21 are provided on the slide plates 17 and 19. These abutting members 21 have a wedge shape having an inclination along an inner slope of the flange 5 of the U-rib 1 abutted.

A piston (not shown) extending in the groove width direction from both ends of a hydraulic cylinder 23 provided at the center of the main body 9 is connected to the inner center of the left and right contact members 21.
It slides and contacts the flange 5 from inside. The hydraulic cylinder 23 is fixed to the main body by a bolt nut 27 via a steel belt 25. Hydraulic cylinder 2
The hydraulic pressure to 3 is supplied by a hydraulic hose 29.

(Operation) While manually moving the device 7 inside the U-rib 1 in the longitudinal direction, the operator stops the device where the groove width is visually considered to be reduced, and stops the edge of the flange 5. After a gauge (not shown) is applied to the portion and the degree of reduction is confirmed by the gauge, the hydraulic cylinder 23 is actuated, and the contact member 21 is slid and brought into contact with the inside of the flange 5. After confirming with a gauge (not shown) that the groove width gradually expands sufficiently by this contact, the hydraulic cylinder 23 is stopped and slid back to the original state. The size of the expansion is determined to be large in consideration of the fact that the groove width returns due to the elasticity of the flange 5. Again, the device 7 is run in the longitudinal direction and moved to the next reduced portion.

(Structure of Groove Width Reduction Correction Apparatus) FIGS. 1 and 3
Is a straightening device for reducing and correcting the groove width. The body 35 is provided with two rollers 33 for traveling in the longitudinal direction of the U-rib 1 along the groove-shaped edge of the U-rib 1 facing upward, that is, the edge of the flange 5. In the main body 35, a pair of vertical members 37 supporting both ends of the two rollers 33 are arranged in the longitudinal direction of the U-rib 1. And a pair of horizontal members 39 arranged at the same position. This horizontal member 39
Are fixed at a fixed distance from each other by bolts 41.

A spacer 43 is sandwiched between the horizontal members 39, and a hydraulic cylinder 45 is provided outside the spacer 43.
Is provided. A contact member 47 is provided at the tip of a piston (not shown) extending from the hydraulic cylinder 45, and a flange 5 is provided.
Are arranged so as to be able to abut from the outside. Hydraulic oil is supplied to the hydraulic cylinder 45 from a hydraulic hose 47. The lateral member 39 has a downwardly shallow U-shape to lock the groove-shaped edge of the U-rib 1 from the outside in the width direction. One inner corner 49 of the U-shape is the other contact member.

(Operation) The worker puts the device 31 in the U-rib 1
While running manually on the flange 5 in the longitudinal direction,
The device is stopped where the groove width seems to be reduced by visual inspection, and a gauge (not shown) is applied to the edge of the flange 5,
After confirming the degree of enlargement by this gauge, the hydraulic cylinder 45 is actuated to bring the contact member 47 into contact from outside the flange 5. After confirming with a gauge not shown that the groove width is gradually and sufficiently reduced by this contact,
The hydraulic cylinder 45 is stopped, and the contact member 47 is returned to the original state. The size to be reduced is determined to be large in consideration of the fact that the groove width returns due to the elasticity of the flange 5. again,
The device 31 is moved in the longitudinal direction and moved to the next enlarged portion.

(Other Embodiments) In the above embodiment, the hydraulic cylinder 45 is provided on only one contact member 47. However, in another embodiment, such a hydraulic cylinder 45 is provided. It is possible to provide a pair or a plurality of pairs of the contact member 47 and the contact member 47 so that the contact can be performed from outside the flange 5.

In the above embodiment, the device for expanding and correcting the groove width and the device for correcting the groove width are provided separately, but in other embodiments, they are combined. It is also possible to configure as an integral object.
In the above embodiment, the rollers 8 and 33 are for manually driving the devices 7 and 31.
In another embodiment, it is also possible to provide a running motor and run the vehicle electrically. Hydraulic cylinder 4
5 may be a hydraulic cylinder or the like.

[0017]

As described above, according to the first, second or third aspect of the present invention, since the correction can be performed while the apparatus is running with the rollers, the work can be performed efficiently.
In addition, since the contact member is slid by the hydraulic cylinder to make contact with the steel material to perform the correction, the correction work can be performed with high accuracy. Further, according to the third aspect, one of the contact members is fixed to the main body, and the other is slid, so that the number of hydraulic cylinders can be reduced, and the cost of the device can be reduced. Becomes possible.

[Brief description of the drawings]

FIG. 1 shows two devices according to an embodiment of the present invention.
It is a perspective view which shows the state which is performing the straightening operation of the rib.

2 (A) is a front view showing a straightening device for expanding and correcting a groove width in FIG. 1; (B) is a plan view of (A); and (C) is a side view of (A).

3A is a front view showing a straightening device for reducing and correcting the groove width in FIG. 1; FIG. 3B is a plan view of FIG. 1A; and FIG. 3C is a side view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 U-rib 3 Web 5 Flange 7 Expansion straightening device 8 Roller 9 Main body 11 Support part 13 Guide plate 15 Rail plate 17, 19 Slide plate 21 Contact member 23 Hydraulic cylinder 25 Steel belt 27 Bolt nut 29 Hydraulic hose 31 Reduction straightening device 33 Roller 35 Body 37 Vertical member 39 Horizontal member 41 Bolt 43 Spacer 45 Hydraulic cylinder 47 Hydraulic hose 49 Inner corner

Claims (3)

[Claims] In order to expand and correct the groove width of a steel material having a groove-shaped cross section, a main body which runs in a longitudinal direction of the steel material with a roller in an upwardly-facing groove shape, and slides in the groove width direction with respect to the main body. A groove width correcting device for a steel material having a groove-shaped cross section, comprising: a contact member that comes into contact with a steel material from inside a groove; and a hydraulic cylinder that slides the contact member. 2. A main body which runs on an edge of an upwardly-grooved groove by a roller in a longitudinal direction of the steel material in order to reduce and correct a groove width of the steel material having a groove-shaped cross section, and slides in a groove width direction with respect to the main body. A groove width correcting device for a steel material having a groove-shaped cross section, comprising: a contact member that comes into contact with a steel material from outside a groove; and a hydraulic cylinder that slides the contact member. 3. The groove-shaped steel member according to claim 1, wherein two contact members are present in the groove width direction, one of which is fixed to the main body and the other is slid. Groove width correction device.