JPH0641325B2 - Method and device for reversing T-shaped steel - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and an apparatus for inverting a T-shaped steel formed in the process of manufacturing a H-shaped steel by welding steel plates and the like.

<Prior art> H is a typical H-shaped steel manufactured by welding.
Shaped steel sheet pile is known. Since the H-shaped steel sheet pile has a compact cross-section and has a high rigidity and a self-supporting structure, it has recently been used as a wall body for river revetments, harbor quays, road retaining walls, and the like.

As shown in FIG. 6, the H-shaped steel sheet pile 10 is formed by welding straight type steel sheet pile 20 having joint claws 18 on both sides using both flanges and a thick plate 22 as a web. By changing the, it is possible to freely change the size of the web, which was not possible with conventional products by the rolling method. In addition, since the flange width is wide, the weight per unit is small, and the wall can be quickly constructed. FIG. 7 shows a situation in which an H-type steel sheet pile wall is built using the H-type steel sheet pile 10. The H-type steel sheet pile 10 which is driven into the ground adjacently is shown.
The claws 18 provided on both ends of the flange are fitted together.

By the way, in order to manufacture an H-shaped steel sheet pile with a predetermined size, for example, two linear steel sheet piles having a width of 527 mm and one thick sheet having a width of 419 mm, as shown in (1) of FIG. If the linear steel sheet pile 20a is conveyed by the
As shown in (2) of the figure, the thick plate 22 is vertically applied from above the center of the linear steel sheet pile 20a, and the corner portion is fillet welded by a welding device (not shown). Next, straight steel sheet pile 20a and thick plate 2
It is formed by welding with 2 and has a reverse T on the roller conveyor A.
Invert the T-shaped steel 30 placed in a letter-like posture to
Another straight type steel sheet pile that has been conveyed on the roller conveyor A as shown in (3) of FIG.
The thick plate 22 in the T-shaped steel 30 from above the center of 20b
The H-shaped steel sheet pile 10 is manufactured by vertically filling the lower end portion of the above with fillet welding.

By the way, conventionally, as shown in FIG. 8 (2), the T-shaped steel 30 obtained by welding the linear steel sheet pile 20a and the thick plate 22 on the roller conveyor A is changed from the inverted T-shaped posture to the T-shaped posture. The following procedure was used to invert.

First, the T-shaped steel 30 placed on the roller conveyor A
As shown in (1) of FIG. 9, the upper end of the thick plate 22 in FIG. 9 is grasped and lifted by the clamp E hung from the crane through the wire G, and then transported to the reversal place and conveyed.
As shown in (2), it is hung on the reversing work floor F in the inverted T-shape. Next, hook claws H are hooked at two positions in the longitudinal direction on one of the claws 18 of the T-shaped steel 30, and are pulled diagonally upward by a crane via a wire G to incline as shown in FIG. 9 (3). Then, pull it down as shown in (4) of FIG. After the hooks H on both sides of the T-shaped steel 30 are hooked on the hooks H at two locations in the longitudinal direction, respectively.
As shown in (5), lift the T-shaped steel 18 with a crane
The T-shaped steel 30 was inverted from the inverted T-shaped posture to the T-shaped posture by the procedure of taking the character-shaped posture.

<Problems to be Solved by the Invention> As described above, the reversing work of the T-shaped steel is performed by the clamp work of the T-shaped steel, the T work by hanging on one side using the nail hacker.
The work of pulling down the V-shaped steel and the lifting work by hanging on both sides using a nail hacker were necessary, and the work was extremely complicated. As described above, since the reversing operation of the T-shaped steel was inefficient, it was the actual situation that the manufacturing efficiency of the H-shaped steel sheet pile was reduced.

The present invention has been made in consideration of the above-mentioned conventional state of the art, and it is possible to efficiently invert a T-shaped steel from an inverted T-shaped posture to a T-shaped posture without requiring large-scale equipment. It is an object of the present invention to provide a T-shaped steel reversing method and device capable of performing the above.

<Means for Solving the Problems> A method of the present invention for achieving the above-mentioned object is to provide a pair of bearing pedestals, which are installed at predetermined intervals at the reversal positions of the T-shaped steel, with a reversing beam of each through a shaft. The center part is tiltably supported, a reversing support arm is provided at the front end of the reversing beam at an upward right angle and a counterweight is provided at the rear end, and the rear part of the reversing beam is beamed by gravity of the counterweight. The inversion beam is placed on a support stand to be held in a horizontal state, while the T-shaped steel is hung from above the inversion beam in a coiled manner via a hanging chain hooked on a crane hook in an inverted T-shape. By gradually lowering it and placing it on the front half of the reversing beam to tilt the reversing beam against the counterweight, and supporting the T-shaped steel by a hanging chain. Meanwhile, after reversing from the inverted T-shaped posture to the T-shaped posture via the reversing support arm at the front end of the reversing beam, the reversing support arm,
The T-shaped steel inverted to the T-shaped posture is supported by the inversion support table installed in front of the support arm, and then the T-shaped steel in the T-shaped posture is lifted through the hanging chain to perform the next step. The T-shaped steel reversing method is characterized in that the reversing beam is returned to the horizontal state by the gravity of the counterweight at the same time as it is conveyed to.

Further, the device of the present invention comprises a pair of bearing bases installed at predetermined positions at the inverted position of the T-shaped steel, and a reversing beam having a central portion tiltably supported via the shafts of the respective bearing bases. ,
A reversing support arm provided at the front end of the reversing beam at a right angle upward, a locking protrusion provided inside the vertical surface of the reversing support arm, and a counterweight provided at the rear end of the reversing beam. And a beam support base on which the rear portion of the reversing beam is placed and supported, and a reversing support base installed in front of the reversing support arm provided at the front end portion of the reversing beam. It is a reversing device for letter steel.

In the apparatus of the present invention, a stopper for locking the lower surface of the front end portion of the reversing beam by tilting can be provided on the lower front surface of the bearing base, if necessary.

<Operation> As described above, according to the present invention, the operation of placing the T-shaped steel in the inverted T-shape, which is suspended in the form of a body coil, on the front half of the reversing beam while gradually suspending it through the suspension chain. Only by itself, it is possible to reverse the T-shaped posture with simple equipment without requiring a special power source for the apparatus itself, and the work efficiency is improved.

<Examples> Hereinafter, the T-shaped steel assembled in the process of manufacturing an H-shaped steel sheet pile by welding using two linear steel sheet piles and one thick plate in the embodiment of the present invention has an inverted T-shaped posture. The case of reversing from to T-shaped posture will be described in detail with reference to the drawings.

1 to 3 show the structure of a T-shaped steel reversing device according to the present invention. In the reversing device 1 of the present invention, the center portion of the reversing beam 16 is tiltably supported by the upper end of the bearing base 12 via the shaft 14, and the front end portion of the reversing beam 16 is reversed upward at a right angle. A support arm 11 and a counterweight 15 are provided at the rear end. Reference numeral 13 denotes a locking protrusion provided on the inside of the vertical surface of the reversing support arm 11.

Further, a beam support stand 17 is installed behind the bearing stand 12, and a part of the counterweight 15 provided at the rear end portion of the reversing beam 16 is placed on the beam support stand 17 to mount the reversing beam 16. Holds horizontal.

On the other hand, a reversing support base 19 is installed in front of the reversing support arm 11 provided at the tip of the reversing beam 16. In addition,
Reference numeral 21 denotes a stopper that locks the lower surface of the front end of the reversing beam 16 by tilting on the lower front surface of the bearing base 12. This stopper 21
Is required when the bearing base 12 has a structure in which two plates are spaced apart as shown in the drawing, but when the bearing base of the stopper 21 has a single solid structure. It may not be necessary for.

FIG. 4 shows a perspective view in which the reversing device 1 having the above-described structure is installed. As shown in FIG. 4, in the T-shaped steel reversing device,
A pair of bearing bases 12 are installed at a predetermined interval,
A reversing beam 16 is tiltably supported on each bearing stand 12, and the rear part of the reversing beam 16 is placed on a beam support stand 17 by gravity of the counterweight 15 to maintain a horizontal state.

On the other hand, a straight steel sheet pile 20 and a thick plate 22 are assembled by welding.
The letter-shaped steel 30 is supported by a two-point suspension in a body-winding manner through a hanging chain 24 hooked on a crane hook 23 in an inverted T-shape and conveyed to a position above the reversing device 1.

Next, the operation of the present invention will be described with reference to FIG. First, as shown in FIG. 5 (1), the T-shaped steel 30 suspended in the form of a body through the suspension chain 24 is lowered from above the reversing device 1 to approach the reversing beam 16, and As shown in FIG. 5 (2), when the T-shaped steel 30 is placed in the inverted T-shaped posture on the semi-front portion of the reversing beam 16, the reversing beam 16 is moved by the gravity of the T-shaped steel 30 to the counterweight 15. As shown in (3) of FIG. 5 against the gravitational force, one claw 18 of the T-shaped steel 30 is positioned below the locking projection 13 and is stabilized on the lower front surface of the reversing arm 11. Be locked.

At this time, since the supporting force of the T-shaped steel 30 by the hanging chain 24 decreases, the hanging chain 24 wound around the body follows the tilting of the reversing beam 16, so that the T-shaped steel 30 also tilts at the same time. Will be done. When the T-shaped steel 30 is continuously lowered, the tilting of the reversing beam 16 and the T-shaped steel 30 further progresses, and (4) in FIG.
The lower surface of the front end portion of the reversing beam 16 is locked by a stopper 21 provided on the lower front surface of the pedestal 12 as shown in FIG.
Tilting stops.

If the supporting force of the hanging chain 24 is loosened in this state,
Since the center of gravity of the T-shaped steel 30 is on the front side, the T-shaped steel 30 is inverted while falling forward through the reversing arm 11 as shown in FIG. 5 (5). As shown in FIG. 5 (6), the T-shaped steel 30 thus reversed is supported by the reversing arm 11 and the reversing supporting base 19 in the vicinity of the claws 18 on both sides to secure the T-shaped posture. . Suspended chain hooked on the crane hook 23.
When 24 is raised, as shown in Fig. 5 (7), T-shaped steel 30
As the reversing beam 16 tilts in the opposite direction due to the gravity of the counterweight 15, the reversing beam 16 returns to a horizontal state as shown in FIG. Supported by.

Thus, if the T-shaped steel 30 in the T-shaped posture that has been lifted by the hanging chain 24 is conveyed to the welding assembly device so as to form an H-shaped steel plate, a series of T-shaped steels can be turned from the T-shaped posture to the T-shaped posture. The work of reversing to the normal posture is completed.

In the above-mentioned embodiment, the T-shaped steel formed in the process of manufacturing the H-shaped steel sheet pile by welding is inverted. However, the present invention is not limited to this, and the T-shaped steel is generally inverted T-shaped. Of course, it can be widely applied to reverse the posture from the T-shaped posture. In this case, it is particularly suitable for reversing the T-shaped steel in which the flange size and the web size of the T-shaped steel are similar.

Further, in the above-described embodiment, the device for reversing the T-shaped steel formed in the process of welding and assembling the H-shaped steel sheet pile of a certain size has been described. The mounting position of the reversing support arm provided at the front end of the is variable, and the weight of the counterweight can be adjusted, and the height and installation position of the bearing stand, beam support stand and reversing support stand can be changed if necessary. It is also possible to deal with this.

<Advantages of the Invention> As described above, according to the present invention, the T-shaped steel in the inverted T-shape that is suspended in a body-wrapping shape is gradually suspended through the suspension chain, and the reversing beam of the reversing device is provided. With the simple operation of placing it on the first half, the T-shaped steel can be transferred to T with simple equipment without requiring a special power source for the reversing device itself.
It is possible to reverse the character-like posture, and the efficiency of the reversing work is improved.

[Brief description of drawings]

FIG. 1 is a side view showing a T-shaped steel reversing device according to the present invention,
2 is a front view showing an AA arrow in FIG. 1, FIG. 3 is a rear view showing an BB arrow in FIG. 1, and FIG. 4 is a T-shaped steel reversing device of the present invention. 5 is a perspective view showing an operating procedure of the present invention, FIG. 6 is a perspective view showing a general H-type steel sheet pile, and FIG. 7 is an H-type steel sheet pile built using the general H-type steel sheet pile. FIG. 8 is a partial perspective view showing the wall-making body, FIG. 8 is an explanatory view showing a welding and assembling state of a general H-shaped steel sheet pile, and FIG. 9 is an explanatory view showing a reversing procedure of a conventional T-shaped steel. 1 ... Reversing device, 10 ... H type sheet pile, 11 ... Reversing support arm, 12 ... Bearing stand, 13 ... Locking protrusion, 14 ... Shaft, 15 ... Counterweight, 16 ... Reversing Beam, 17 ... Beam support, 18 ... Pawl, 19 ... Inverted support, 20 ... Linear steel sheet pile, 21 ... Stopper, 22 ... Thick plate, 23 ... Crane hook, 24 ... Suspension chain .

Claims (3)

[Claims] 1. A front end portion of the reversing beam, wherein a center portion of the reversing beam is tiltably supported by a pair of bearing bases installed at predetermined positions at a reversing position of the T-shaped steel through shafts. While providing a reversing support arm at a right angle to the upside and providing a counterweight at the rear end, while the gravity of the counterweight causes the rear part of the reversing beam to be placed on a beam support to hold the reversing beam in a horizontal state, By suspending the T-shaped steel from above the reversing beam in a body-like shape through a hanging chain hooked on a crane hook in a reverse T-shape and gradually lowering it, and by mounting it on the front half of the reversing beam. The reversing beam is tilted against the counterweight, and the T-shaped steel is supported by a hanging chain, and an inverted T-shape is formed through a reversing support arm at the front end of the reversing beam. After the inverted T-shaped posture from energized,
The inversion support arm and an inversion support stand installed in front of the support arm support the T-shaped steel inverted in the T-shape, and subsequently the T-shape in the T-shape through the suspension chain. A method of reversing a T-shaped steel, characterized in that the reversing beam is returned to a horizontal state by gravity of a counterweight at the same time when the steel section is lifted and conveyed to the next step. 2. A pair of bearing pedestals installed at a predetermined interval at the reversal position of the T-shaped steel, a reversing beam rotatably supported in the center through the shaft of each of the bearing pedestals, A reversing support arm provided at the front end of the reversing beam at a right angle upward, a locking projection provided on the inside of the vertical surface of the reversing support arm, and a counterweight provided at the rear end of the reversing beam. , A T-shaped support comprising a beam support table on which a rear portion of the reversing beam is placed and supported, and a reversing support table installed in front of a reversing support arm provided at a front end portion of the reversing beam. Reversing device for shaped steel. 3. The apparatus according to claim 2, wherein a stopper for locking the lower surface of the front end of the reversing beam by tilting is provided on the lower front surface of the bearing base.