JPH039849Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields This invention relates to a strain straightening machine for steel plates.

(b) Conventional technology In the past, when roads were excavated and construction work was carried out to bury gas, water pipes, electric wires, or subway construction, etc., the excavated areas were covered with steel plates to prevent danger or allow vehicles to pass through. is being carried out.

(c) Problems that the invention attempts to solve However, once the steel plate is used for the cover,
Distortion occurs due to the weight of passing vehicles, etc., and this distortion makes it difficult to work when used again, and the covered steel plate is unstable.

(d) Means for solving the problem In this invention, the internal space of an upright movable frame is formed by forming a horizontally arranged approximately rectangular bed into an approximately □-shape with left and right supports and upper and lower beams. The frame is inserted through the lower part to support the frame so that it can move back and forth parallel to the left and right edges of the bed, and a hydraulic jack that operates downward can be moved left and right to the upper beam of the frame parallel to the inner edge of the beam. Moreover, due to the reaction force when the downward operating hydraulic jack is activated, the movable frame moves upward to absorb the reaction force through the contact between the inner edge of the lower beam and the lower surface of the bed. It is an object of the present invention to provide a steel plate strain straightening machine in which a constant gap is formed between the edge and the lower surface of the bed.

(E) Functions and Effects In this invention, a strained steel plate is placed on the top surface of the bed of the strain straightening machine configured as described above, and the movable frame is moved back and forth and the hydraulic jack is moved left and right to identify the location where the strain occurs on the steel plate. Accordingly, the above-mentioned distortion can be corrected by operating the same jack and pressing the steel plate from above toward the top surface of the bed.Since the same jack can be moved forward, backward, left, and right, it is possible to correct the above-mentioned distortion in each part of the above-mentioned steel plate. Even if distortion occurs, the distortion on the entire surface of the steel plate can be corrected by sequentially correcting the distorted parts, making it possible to use the same steel plate repeatedly.

(F) Embodiment The embodiment of this invention will be explained in detail based on the drawings. A shows a steel plate strain straightening machine, a bed 2 on which a strained steel plate 1 is placed, and a bed 2 supported by the bed 2. It is comprised of a moving frame 3 that is movable back and forth, and a hydraulic jack 4 that is supported by the frame 3 and is movable left and right.

The bed 2 is constructed by arranging four H-shaped steel members 5 horizontally in parallel to form a horizontal plane on the upper surface of the steel members 5, and by stretching a thick steel plate 6 on the upper surface to straighten the distortion of the steel plate 1. It serves as a support surface for work. Note that the front and rear ends of the H-shaped steel members 5 are connected by connecting members 7 to form a rectangular frame-shaped bed 2, and legs 8 are provided at the four corners of the bed 2 to form the bed. 2 is maintained at a predetermined height from the ground.

The movable frame 3 has front and rear frames 9, 10, which have substantially the same shape, and are arranged side by side with a predetermined distance between them. The upper and lower ends of the left and right pillars 11 and 12 with approximately H-shaped cross sections, which are installed on the left and right sides of 2, are connected by upper and lower beams 13 and 14 with approximately box-shaped cross sections, respectively, so that the inside of the approximately □-shaped moving frame 3 is bedded. 2 is inserted, and the movable roller 16 is pivotally supported via a movable roller base 15 provided in the lower part of the inner side of the left and right columns 11, 12 in a manner that overhangs in the front and rear direction. The movable frame 3 is made freely movable back and forth in parallel with the left and right edges 18 of the bed 2 by rolling on rails 17 formed on the lower inner surfaces of the left and right H-beams.

Reference numeral 17' indicates a cover for the moving roller 16, and a predetermined gap S-1 is set between the cover 17' and the upper surface of the moving roller.

The inner edge 9 of the upper beam and the inner edge 20 of the lower beam 14 of the moving frame 3 and the lower beam 14 are each formed on a horizontal straight line, and the upper and lower beams 13, 1
The outer edges of 4 are each formed in a substantially mountain shape with the thickness increasing from the left and right ends toward the center.

In particular, a predetermined gap S-3 is set between the inner edge 20 of the lower beam 14 and the lower surface 2' of the bed 2.

The front and rear frames 9 and 10 are arranged in parallel in the front and rear with a predetermined gap maintained, and are connected via upper and lower edge members 21 and 22 that are connected to the upper and lower edges of the upper and lower beams 13 and 14, respectively. A hydraulic jack 4 is disposed between 9 and 10, and rollers 24 are pivotally supported at each of the four corners on the inner edge 19 of the upper beam 13, and a trolley 23 that is movable from side to side is used as a jack support in the shape of a substantially rectangular parallelepiped. 25, the same support 25
A predetermined gap S-2 is maintained between the upper surface and the inner edge 19 of the upper beam, and the hydraulic jack 4 is vertically mounted at the center of the support 25 with the ram 26 facing downward. I support it. In addition, each gap S-
Between the dimensions of 1, S-2, and S-3, S-2<S
There is a relationship: -1>S-3.

As mentioned above, the movable frame 3 is movable back and forth, and the hydraulic jack 4 supported by the frame 3 is movable left and right, so the ram 26 of the jack 4 can move to all positions on the top surface of the bed 2. It is possible.

A bracket 27 is connected to the outer surface of the left column 12 of the moving frame 3, and a hydraulic pump unit 28 is connected to the bracket 27.
The unit 28 is an integral structure of a hydraulic pump and an oil tank, and uses hydraulic pressure from the unit to operate the ram 26 of the hydraulic jack 4 downward. An attachment 29 corresponding to the distorted shape of the steel plate 1 is attached to the lower end of the steel plate 1, and the steel plate 1 is pressed through the attachment 29 to correct the distortion.

Note that 29' indicates a turnbuckle for attaching the attachment 29.

During this straightening work, when the hydraulic jack 4 is operated, a compressive force acts between the upper surface of the bed 2 and the same jack 4 via the moving frame 3, and this force causes the upper surface of the jack support 25 to move upward. The moving frame 3 moves upward and comes into contact with the inner edge 19 of the upper beam 13, and then the moving frame 3 moves upward and contacts the inner edge 19 of the upper beam 13.
The inner edge 20 of the bed 2 comes into contact with the lower surface of the bed 2 to absorb the compressive force, and due to the contact at these two places, the movable frame 3 and the hydraulic jack 4 position are fixed, allowing stable straightening work to be performed. The reaction force of the actuation of the jack 4 is absorbed by the movable frame 3 through the abutment.

In addition, FIG. 3 shows the hydraulic jack 4, and a plunger 4 is installed inside the cylinder 4-1 of the same jack 4.
-2 is inserted, and the ram 26 is operated downward by the oil pressure from the oil supply hole 4-3 and upward by the oil pressure from the return oil hole 4-4. In addition, depending on the state of distortion of the steel plate 1, a plate-shaped piece is inserted between the lower surface of the steel plate 1 around the pressing position of the attachment 29 and the upper surface of the thick steel plate 6 of the bed 2 to correct the spring back of the steel plate 1. You can also do some work.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the steel plate straightening machine according to the proposed structure. Fig. 2 is a front view (sectional view of Fig. 1). Fig. 3 is a longitudinal sectional view of the hydraulic jack. Figure - Sectional view. 2: Bed, 3: Moving frame, 4: Hydraulic jack, 18: Left and right side edges, 19: Upper beam inner edge.

Claims (1)

[Scope of utility model registration request] A horizontally arranged approximately rectangular bed 2 is inserted into the lower part of the internal space of an upright movable frame 3 formed into an approximately □ shape by left and right columns 11, 12 and upper and lower beams 13, 14, and moved. The frame 3 is supported so as to be movable back and forth in parallel with the left and right edges 18 of the bed 2, and a downward-actuating hydraulic jack 4 is moved left and right on the upper beam 13 of the frame 3 in parallel with the inner edge 19 of the beam. Furthermore, the movable frame 3 moves upward due to the reaction force when the hydraulic jack 4 operates downward, and the lower beam inner edge 20 and the lower surface 2' of the bed 2 come into contact with each other. Lower beam inner edge and bed 2 to absorb force
A steel plate strain straightening machine configured with a constant gap S-3 between the lower surface and the lower surface.