JP3007249B2 - Stacking device for U-shaped steel sheet pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a U-shaped steel sheet pile, packing in the outlet side of the production line, for the heavy I equipment loading of U-shaped steel sheet pile stacked one by several for shipping.

[0002]

2. Description of the Related Art A U-shaped steel sheet pile is of a known shape having a U-shaped cross section. Therefore, when stacking and packing for storage and transportation, the orientation is considered differently from round steel and steel pipes. In addition, unlike the angle irons and channel steels, it is not possible to stack them together compactly because they have joints in the longitudinal direction at both edges, unlike the angle irons and channel steels. It is normal to simply stack them.

[0003] Such a stacking operation is mainly performed in a delivery yard of a rolling mill that manufactures U-shaped sheet piles.
Specifically, it is usual that the U-shaped sheet piles sent on the transfer table arranged at the final end of the rolling line are stacked one by one on the preceding material, and are transferred in the longitudinal direction. There are two types of stacking: one is stacking in the state of being transported, and the other is stacking in the state of being transported in the width direction. Is generally adopted. In this specification, a table for feeding a material in the longitudinal direction is referred to as a transport table, and a table for sending a material in the width direction is referred to as a transfer table.

FIG. 9 shows an example of a very ordinary stacking method described as a conventional example in Japanese Utility Model Publication No. 55-109622, in which a steel sheet pile 2 conveyed in the width direction is attracted to a lifting magnet 110. It is transported to the mounting table 111 and this is repeated.However, there are problems such as the need to use an overhead crane, the time required for positioning when attracting to the lifting magnet 110, and the generation of sound when dropping. There is.

FIG. 10 shows an embodiment of the invention disclosed in Japanese Utility Model Laid-Open Publication No. 55-109622, in which the arriving material pushed from the right to the left by the transfer head 120 synchronized with the transfer table 1 is shown. 2b is pushed upward by the inclined guide 121 as it is pushed, and is dropped and stacked on the preceding material 2a. According to this invention, since the stacking work can be performed together with the conveyance, the efficiency is lower than that of the lifting magnet method, but the problem of the dropping sound has not been solved.

FIG. 11 shows a method of stacking long materials disclosed in Japanese Patent Application Laid-Open No. 55-115528. As shown in FIG. 11A, the transfer table 1 is moved in the width direction from the right hand of the drawing as indicated by an arrow. Arrives on the roller-type transfer table 12 in a direction perpendicular to the transfer table 1 and is positioned by the stopper 11. The lifting device 130 waiting upward is configured by suspending two claw members 132 from the horizontal beam member 131 downward with pins.
The leading material 2a of the steel sheet pile is already held inside the claw. When the lifting device 130 is lowered, the claw member 132 is expanded at the flange portion of the steel sheet pile 2b which is opened in an eight-shape, and the leading material 2a is expanded.
Falls onto the succeeding steel sheet pile 2b.

When the lifting device 130 is further lowered, the tip of the claw engages with the lower surface of the steel sheet pile 2b.
If 0 is raised, a new steel sheet pile 2b can be lifted over the preceding material 2a. In this way, the steel sheet piles that have arrived one after another are stacked one on another. When unloading stacked products,
When the lifting device 130 is further lowered as shown in (b), the claw portion 132 is expanded by the guide member 133 installed below the roller table 12, and when the roller table 12 is driven in this state, the stacked state is obtained. The steel sheet pile is carried out as it is.

[0008]

According to the above-mentioned conventional system, when stacking work is performed on a table roller, the work efficiency is low in a system in which stacking is not possible during conveyance, and skew or meandering occurs during table conveyance. If there is, there is a problem that it takes more time to stack. Further, in the method of stacking by dropping, there are problems such as generation of noise and flaws due to dropping, and uneven stacking height. In the method using the lifting magnet, the time loss for suction and release is large, and it takes a long time to perform positioning, which is not efficient.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a method and an apparatus for stacking steel sheet piles that can efficiently perform stacking operations and generate no noise.

[0010]

[Means for Solving the Problems]

According to the present invention, there is provided a stopper for freely stopping a U-shaped sheet pile at a predetermined position on a transfer table,
Above the transfer table, a girder installed in the longitudinal direction of the U-shaped steel sheet pile, and an elevating frame suspended from a plurality of pairs of openable and closable arms which are attached to the girder so as to be able to move up and down and have a claw at a tip portion When the attached to the girder, the elevating mechanism for raising and lowering while keeping the horizontal the lifting frame, e Bei a forced opening mechanism for opening the opening and closing arm forcibly lifting frame and lifting mechanism is divided into a plurality groups, In addition, the lifting mechanism of each group connects a plurality of lifting rods in the same group to a common connecting rod individually via one lever and another lever, and the connecting rod is driven by a lifting cylinder. is configured to news between adjacent groups is a stacking device U-shaped steel sheet pile connecting rod is coupled with the clutch.

[0012]

According to the present invention, the conveyed U-shaped steel sheet pile is temporarily lifted upward, the one that has been lifted upward is dropped on the next arrived one, and the stacked U-shaped steel sheet pile is re-stacked. By lifting and repeating this operation, a predetermined number of U-shaped steel sheet piles can be stacked.

Further, since the falling distance is minimized by devising the shape of the opening / closing arm for lifting the U-shaped steel sheet pile, there is no generation of noise and flaws, the stacking height is constant, and there is no trouble in the subsequent handling. A stack without any material is realized.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a stacking device for U-shaped steel sheet piles of the present invention. A transfer table 1 to which a U-shaped steel sheet pile is conveyed in a width direction is provided with a stopper 2 for stopping a material at a predetermined position. A girder G is provided above the transfer table in the longitudinal direction of the U-shaped sheet pile,
From the girder G, an elevating frame 7 in which a plurality of pairs of openable and closable arms 3 each having a claw at a tip end are suspended via an elevating mechanism 8.

The U-shaped sheet pile P is a transfer table 1
It is conveyed from the left side in the width direction and stopped at a predetermined position by the stopper 2. 21 is a lifting cylinder of the stopper 2,
Reference numeral 22 denotes a lifting lever of the stopper 2. Since the stop position of the U-shaped sheet pile P needs to coincide with the center of the upper opening / closing arm 3, if the material to be handled has various dimensions, the structure of the stopper 2 may be adjustable. desirable.

FIG. 2 is a partial sectional view showing the operation of the lifting frame 7 and the opening / closing arm 3. As shown in FIG.
The opening and closing arm 3 can be freely rotated around the axis 4 to open and close.
In a no-load state, it hangs almost vertically by its own weight as shown by a solid line. When the steel sheet pile arrives and the elevating frame 7 is lowered by the elevating mechanism described in detail later, the opening / closing arm 3 is gradually opened along the outer surface of the steel sheet pile P, and the claw at the tip end is opened.
When the portion 3a sinks below the surface of the transfer table 1, the opening / closing arm 3 closes by its own weight until it sandwiches the steel sheet pile P as indicated by a chain line. Therefore, when the lifting frame 7 is raised, the U-shaped steel sheet pile P is lifted. Can be lifted.

Next, when a new U-shaped sheet pile P 'is conveyed on the transfer table and stopped at a predetermined position by the stopper 2, the first U-shaped sheet pile P being lifted is lifted.
And drop it on a new U-shaped steel sheet pile P ′ to stack it. It is needless to say that the free fall distance is desirably short from the viewpoints of noise prevention and surface flaws, etc., but by devising the shapes of the open / close arm 3 and the claw 3a at the tip, the fall distance can be extremely small. can do.

FIG. 3 is a partial sectional view showing the operation of the lifting frame 7 and the opening / closing arm 3 in a state where the steel sheet pile P is already held at the opening / closing arm 3, and the next steel sheet pile P 'arrives and stops. When the lifting frame 7 is lowered again after stopping at a predetermined position, that is, at the center position of the opening / closing arm 3, the tip claw 3a of the opening / closing arm 3 becomes a new steel sheet pile P at the moment shown in FIG. '
The opening / closing arm 3 starts to be opened by this new steel sheet pile P ′, and the state shown in FIG. At this time, the upper steel sheet pile P is barely supported by the tip claw 3a of the opening / closing arm 3, but it is in a limit state that even if the opening / closing arm 3 is slightly opened, it falls. On the other hand, at this time, since the lower inclined surface of the tip claw 3a is in contact with the lower steel sheet pile P ', if the opening / closing arm 3 is slightly lowered, the opening / closing arm 3 is further opened. ) Indicates a falling start state. As described above, at the opening d of the opening / closing arm 3 at the limit where the steel sheet pile P does not fall, how to approach the lower steel sheet pile P ′ is a point for reducing the falling distance. As a result of repeating the experiment on the claw shape, the one shown in Fig. 4 showed the best results. The free fall distance of the U-shaped sheet pile P was only 2.3mm, there was almost no impact or noise, and the stack height was always high. It was constant. If the stacking condition is stable and the height is constant,
This is convenient because the cargo does not collapse when a plurality of lots are stacked in the subsequent handling.

When a plurality of U-shaped steel sheet piles to be handled are used in a plurality of sizes and the claw shape is to be changed, the tip of the opening / closing arm may be made detachable and replaced according to the material. By the way, within the above description range, the opening and closing arm 3
It is sufficient that the steel sheet pile is freely opened and closed along its own weight or the steel sheet pile. However, when a predetermined number of steel sheet piles are stacked, it is necessary to carry them out. For this purpose, a forced opening cylinder 6 and a forced opening lever 5 for forcibly pushing and opening the opening / closing arm 3 from the inside are provided. As shown in FIG. 5, assuming that the take-out arm is taken out to the right in the figure as indicated by an arrow, the piled steel sheet piles can be moved by opening the open / close arm 3 on the take-out side by about 75 degrees to the position of the solid line.

Alternatively, instead of opening the opening / closing arm 3 widely, as shown by the opening / closing arm 3 'on the left side of FIG. The tip of the nail 3a, 3a '
May be opened to a position where it comes off the steel sheet pile P, and the lifting frame 7 may be raised to release the opening / closing arm upward.

The stopper 2 is lowered, the transfer table 1 is operated, and the stacked steel sheet piles are carried out in the width direction. 6 is a front view showing an elevating mechanism of the elevating frame 7, FIG. 7 is a partially detailed view of FIG. 6, and FIG. 8 is a plan view. In this embodiment, assuming the length of the steel sheet pile up to 30 m, ten open / close arms are installed at 3 m intervals in the longitudinal direction.
m may be handled. In the case of a short object less than 15m, it is energy loss to raise and lower the entire lifting frame for 30m, so the lifting frame and lifting mechanism are divided into two groups in the longitudinal direction, and only one group on one side can be raised and lowered. is there. For this reason, the lifting mechanism is also divided into two groups, and a clutch 86 is provided at an intermediate portion.

The elevating mechanism connects the suspension rods 83, 83 ', the levers 82, 82', and the levers 81, 81 ', which are provided for each opening / closing arm, and the distal end of each lever 81, 81'. Rods 84, 84 ', lifting cylinders 85, 85' provided for each system, and clutch 86 provided between the systems
It consists of. Since the lifting rods 83, 83 'lifting the lifting frames 7, 7' are connected by connecting rods 84, 84 'via levers 82, 82', 81, 81 ',
The operations in the groups are perfectly synchronized, so that when the clutch 86 is disengaged, only one group on one side moves up and down individually, and when the clutch 86 is connected, the whole group moves up and down.

The elevating mechanism is not limited to this example, and the cylinder may be installed vertically to directly suspend the elevating frame, or an electric mechanism may be used. It is sufficient that the lifting frame can be raised and lowered quickly while maintaining the level. Further, depending on the specifications of the product, the lifting frame and the lifting mechanism may be divided into more than two parts.

[0024]

According to the present invention, efficient and stable stacking work can be performed without generating noise or flaws. In the conventional method, regardless of long or short material, 1
It took about 30 seconds to stack the sheets, but according to the present invention, it takes about 15 seconds for a long material and about 15 seconds for a short material.
Can be processed.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged view showing a part of FIG. 1;

FIG. 3 is an enlarged view showing a part of FIG. 1;

FIG. 4 is a detailed view showing a part of FIG. 1;

FIG. 5 is an enlarged view showing a part of FIG. 1;

FIG. 6 is a front view showing the embodiment of the present invention.

FIG. 7 is an enlarged view showing a part of FIG. 6;

FIG. 8 is a plan view showing an embodiment of the present invention.

FIG. 9 is a side view showing a conventional technique.

FIG. 10 is a side view showing another conventional technique.

FIG. 11 is a side view showing still another conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Transfer table 2 Stopper 21 Stopper raising / lowering cylinder 22 Stopper raising / lowering lever 3 Opening / closing arm 3a Claw 4 Shaft 5 Forced release lever 6 Forced release cylinder 7 Lifting frame 8 Lifting mechanism 81, 82 Lever 83 Suspension rod 84 Connecting rod 85 Lifting cylinder 86 Clutch

Continuation of the front page (56) References JP-A-5-8859 (JP, A) JP-A-61-94992 (JP, A) JP-A 1-147380 (JP, U) JP-A 2-34584 (JP , U) Jikken 48-41428 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 57/18 B65G 57/00

Claims (1)

(57) [Claims] 1. A removable stopper (2) for stopping a U-shaped sheet pile at a predetermined position on a transfer table (1).
And a girder (G) installed in the longitudinal direction of the U-shaped steel sheet pile above the transfer table, and a plurality of pairs which are attached to the girder so as to be able to move up and down and have pawls (3a) at the tips and can be opened and closed. An elevating frame (7) in which an opening / closing arm (3) is hung, an elevating mechanism (8) attached to the girder, and elevating the elevating frame while keeping the level,
Force opening mechanism for forcibly opening the open / close arm (5, 6)
And a lifting frame (7) and a lifting mechanism (8)
Is divided into a plurality of groups, and the lifting mechanism of each group
Hanging rods (83) for hanging multiple descending frames
Common via lever (82) and other levers (81) sequentially
Connected to the connecting rod (84)
(85), and between adjacent groups
Is a U-shaped sheet pile stacking device in which connecting rods are connected by a clutch (86) .