JPH0225534Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a strain straightening device for an H-shaped steel that continuously corrects the strain generated in the flange portion of the H-shaped steel while the steel is lying horizontally.

[Conventional technology]

An H-shaped steel or an I-shaped steel that has a strain on its flange is placed horizontally and fixed on a support, and a strain straightening machine is mounted on a trolley that runs on a track laid along the support. A strain correcting device is already known in which the strain is corrected by moving the straightening device along the flange portion (Japanese Utility Model Publication No. 57-200316).

[Problem that the invention attempts to solve]

However, since the conventional strain correction device runs on a track, it cannot run freely on the floor surface. Therefore, there is a disadvantage that the work area is limited, and if the positional relationship between the strain straightening machine and the flange part is not accurate, it is difficult to insert and engage the flange part into the strain straightening machine. Alternatively, the support stand must have a structure whose position can be adjusted, which has the disadvantage of complicating the structure and increasing costs.

In addition, the strain straightening machine is supported so as to be able to move up and down through cushion rubber, coil springs, etc., but the cushion rubber has poor ability to follow the deformation of the flange, making it difficult to move the strain straightening machine smoothly along the flange. I couldn't move it.

[Purpose of invention]

The present invention was made to solve the above-mentioned problems of the conventional technology, and its purpose is to be able to move freely on the floor, work at any location, and to be able to insert and engage the flange part. It is an object of the present invention to provide a strain straightening device for an H-beam steel, which is easy to move and can move a strain straightening device smoothly along a flange portion with good followability.

[Summary of the idea]

In order to achieve the above object, the present invention is equipped with a running trolley that runs straight on the floor along the longitudinal direction of the H-shaped steel, which is supported horizontally with its flange section vertical. An elevating frame is supported via an air spring so that it can be raised and lowered. This lifting frame is equipped with a strain straightening machine that is movably engaged with the flange of the H-shaped steel along its longitudinal direction and that presses the flange from the inner and outer surfaces to correct the distortion. It is supported so that it can move freely in the direction perpendicular to the . Further, the above-mentioned traveling carriage is provided with a steering wheel that can freely protrude and retract from the lower surface of the traveling carriage with respect to the floor surface.

〔Example〕

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in Fig. 2, the H-beam 1 to be strained is
The web 1b is supported and fixed on the support base 2 so that the flange portion 1a is vertical. This support stand 2 is arranged on the floor surface 3 along the H-section steel 1 continuously or intermittently. Support stand 2 on floor 3
It may also be removably installed on the top.

As shown in FIGS. 1 and 2, the strain correction device according to the present invention includes a traveling carriage 4 that runs straight on a floor surface 3 along the longitudinal direction of the H-beam 1. This traveling bogie 4 is equipped with four urethane wheels 5 set for straight travel, and the rear wheels are each driven by a motor 6.

Further, a set of steering wheels 7 are connected to the running bogie 4 near the front wheels of the bogie 4 via cylinders 8, respectively.
It is provided so that it can freely appear and retract from the bottom surface of the floor surface 3. That is, by lowering the steering wheel 7 onto the floor surface 3 and supporting the front side of the traveling truck 4 with the steering wheel 7, steering can be performed.
As shown in FIG. 3, the steering wheel 7 consists of a caster, and both ends of the axle 9 are connected to both ends of a steering chain 11 wound around a sprocket 10, respectively. The sprockets 10 are connected to driven sprockets 12 supported on both sides in the vehicle width direction of the traveling bogie 4 so as to rotate integrally with each other, and these driven sprockets 12 are connected to a handle 13.
The drive sprocket 14 is connected via a chain 15 to a drive sprocket 14 attached to a shaft 13a. Therefore, the steering wheel 7 can be steered by operating the handle 13. The cylinder 8 is attached to the traveling carriage 4 with the piston rod 8a facing downward, and a support frame 17 of the steering wheel 7 is rotatably supported on a base plate 16 fixed to the tip of the piston rod 8a. In FIG. 7, reference numeral 18 indicates an operating lever of a hydraulic unit for operating the cylinder 8.

An elevating frame 19 is provided on the traveling carriage 4 via an air spring 20 so as to be movable up and down. In order to vertically raise and lower the elevating frame 19, vertical shaft holes 21 are formed at the four corners of the elevating frame 19, and guide rods 22 provided upright on the traveling carriage 4 slide into these shaft holes 21. It is inserted so that it can move freely.

A strain corrector 23 is provided on the lifting frame 19 so as to be able to move freely in a direction (vehicle width direction) perpendicular to the traveling direction of the traveling trolley 4. In order to support the strain straightening machine 23 so that it can move freely, groove-shaped rails 24 facing each other are provided at the front and rear of the elevating frame 19 along the vehicle width direction.
Wheels 25 attached to the bottom of 3 are supported.

The lifting frame 19 has both sides of the distortion straightening machine 23,
A frame 16 that covers the upper and back parts (opposite side of the H-shaped steel 1) is provided, and the distortion straightening machine 23 is connected to the H-shaped steel between the frame 26 that covers the back part and the back part of the strain straightening machine 23. Biasing spring 2 for biasing toward the 1st side
7 is interposed. In Fig. 1, 30 is a cable drum, and in Fig. 2, 31 is a grooved rail 2.
This is a stopper pin attached to 4, and restricts the movement of the strain straightener 23 toward the H-beam 1 side.

On the other hand, the strain corrector 23 is formed with a C-shaped side surface,
The flange portion 1 of the H-shaped steel 1 is inserted into the T-shaped groove portion 32.
A can be inserted through it. Further, a pressing cylinder 34 with a pressing head 33 attached to the tip of a piston rod is provided at the base of the strain straightening machine 23, and between the pressing head 33 and upper and lower arms 35, the flange portion 1a of the H-section steel 1 is moved back and forth. It is designed to correct the distortion by applying pressure from the top.

Next, we will discuss the effect.

When the strain straightening machine 23 is to be engaged with one flange portion 1a of the H-shaped steel 1 installed on the support base 2, the steering wheel 7 is made to protrude and the steering wheel 7 and the driving rear wheel 5 are used to move the traveling bogie. 2 is run, the height of the strain straightening machine 23 is adjusted by the air spring 20, and the flange portion 1a of the H-shaped steel 1 is inserted into the groove portion 32 of the strain straightening machine 23 while steering the traveling trolley 4.
Insert. In this case, since the traveling carriage 4 can be steered, it is easy to insert and engage the flange portion 1a.

After the flange portion 1a is inserted into the groove portion 32 of the distortion straightening machine 23, the steering wheel 7 is raised and stored.
The traveling trolley 4 is made to run straight parallel to the H-section steel 1 using wheels 5, and the strain straightening machine 23 is moved along the flange portion 1a. Deformation of the flange portion 1a and support base 2
Horizontal displacement of the strain straightening machine 23 due to poor installation (misalignment, inclination, etc.) on the grooved rail 24
and the wheels 25, and the vertical displacement is allowed by the elastic deformation of the air spring 20, so
The strain straightener 23 smoothly follows and moves along the flange portion 1a. In particular, the floor surface 3 is
It is possible to absorb the vertical movement of the strain straightening machine 23 due to the unevenness of the flange portion 1a of the H-shaped steel 1.
The height of the strain corrector 23 relative to the support base 2 can be easily adjusted without adjusting the height of the support base 2.

When the strain straightening machine 23 comes to the strained part of the flange portion 1a, the traveling carriage 4 is stopped, and the cylinder 34 of the strain straightening machine 23 is extended, so that the H-shaped steel is pressed between the pressing head 33 and the arm 35. The flange portion 1a of No. 1 is pressed to correct the distortion.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

(1) Since steering wheels are installed on the traveling trolley that is equipped with a strain straightening machine and travels straight, it can run freely on the floor, allowing work to be carried out at any location, and the flange part can be inserted and engaged easily. It's easy.

(2) In addition, since the strain straightening machine is mounted on the traveling trolley so that it can be raised and lowered via an air spring, it is easy to adjust the height, and the elastic deformation of the air spring allows the strain straightening machine to follow along the flange. It can be moved smoothly.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the strain straightening device for H-section steel according to the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line A-A in Fig.
The figure is a perspective view showing the steering wheel operating mechanism. In the figure, 1a is a flange part of H-beam steel, 4 is a traveling truck, 7 is a steering wheel, 19 is a lifting frame, 2
0 is an air spring, and 23 is a distortion corrector.

Claims (1)

[Scope of utility model registration request] H supported horizontally with the flange section vertical
In a device for correcting distortion in the flange part of a section steel,
A traveling truck that travels straight on the floor along the longitudinal direction of the H-shaped steel, an elevating frame that is supported on the traveling truck via an air spring so as to be able to rise and fall, and an elevating frame that is perpendicular to the traveling direction. a strain straightening machine that is supported so as to be freely transverse in the direction, is engaged with the flange portion of the H-shaped steel so as to be movable along its longitudinal direction, and presses the flange portion from the inner and outer surfaces to correct the distortion; A strain straightening device for H-beam steel, characterized in that it is provided with a steering wheel provided so as to be freely protrusive and retractable from the lower surface of the traveling truck to the floor surface.