JPH11278666A - Steel sheet pile stacking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stack three steel sheet piles in approximately flat shape efficiently into the specified packing style. SOLUTION: This device is to stack three steel sheet piles 2b, 2f, 2m in flat shape transported by a chain conveyor 1, wherein a swing are 3 rotating from ahead about the transporting direction to inside the transport path and a reversing pawl 4 rotating oppositely thereto are installed under the chain conveyor 1. The arrangement further includes a stopper which protrudes into the transport path and stops the stacked steel sheet piles and a pusher 6 which pushes the third steel sheet pile in the transporting direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-piece steel sheet pile having a substantially flat plate shape as a whole and having engaging portions on both sides.
The present invention relates to a stacking device for steel sheet piles, in which units are stacked and used as a package at the time of shipment.

[0002]

2. Description of the Related Art Generally, when stacking three kinds of steel sheet piles of this kind, a method of reversing a middle sheet pile is usually used. Most were done with cranes fitted with magnet hangers.

[0003]

However, in such a prior art, first, a reversing operation of a second steel sheet pile,
It takes about 20 seconds to stack the inverted second sheet pile on the first sheet pile and to stack the third sheet pile on the second sheet pile. There was a problem of inefficiency. SUMMARY OF THE INVENTION An object of the present invention is to provide a steel sheet pile stacking apparatus capable of stacking three steel sheet piles each having a substantially flat shape in a required form in about half or less the time required in the related art.

[0004]

SUMMARY OF THE INVENTION A stacking apparatus for steel sheet piles according to the present invention is of a type in which three substantially sheet-like steel sheet piles conveyed in the width direction by a conveying means, for example, a chain conveyor, are stacked as one unit. It is. In particular, a swing arm that is arranged below the transfer means and rotates from the front side in the transfer direction into the transfer path, and is located adjacent to the transfer arm rear side of the swing arm in the transfer direction, and is located from the rear side in the transfer direction. A reversing claw that rotates into the transport path, a stopper that projects into the transport path forward from the swing arm in the transport direction, and temporarily stops the stacked steel sheet piles, and presses the third steel sheet pile in the transport direction. More preferably, a hooking step for lifting the steel sheet pile to a required height is provided on the steel sheet pile contact surface of the reversing claw.

Another device of the present invention is a swing arm having the same structure as described above, and is located adjacent to a rear side of the swing arm in the transport direction, and is rotated from the rear side in the transport direction into the transport path. A lifter that moves, a reversing arm that is pivotally supported by a portion near the fulcrum of the lifter and rotates forward in the transport direction, and a slipper that is pivotally supported at a position separated from the fulcrum and pivots rearward in the transport direction. A restraining arm is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical embodiment of the apparatus according to the present invention will be described below. FIG. 1 is a schematic perspective view of the apparatus of the present invention showing the embodiment. In the figure, reference numeral 1 denotes a chain conveyor as a conveying means, and here, an example is shown in which three rows are arranged in parallel and operate synchronously with each other. The chain conveyor 1 conveys a substantially sheet-like steel sheet pile 2 as a whole in the width direction thereof.

[0007] Between the chain conveyors adjacent to each other, a swing arm 3 and a reversing claw 4 are respectively arranged below the chain conveyors in order from the front side in the transport direction. The swing arm 3 is rotatable around a pivot 3a from the front side in the transport direction A into the transport path, as shown in FIG. Around the pivot 4a located close to 3a, it is possible to rotate from the rear side in the transport direction A into the transport path, opposite to the swing arm 3. Here, preferably, a hooking step 4b for lifting the steel sheet pile 2 to a required height is provided on the steel sheet pile contact surface of the reversing claw 4 near the pivot 4a. Although not shown, a motor, a cylinder, or the like can be used as a driving unit of the arm 3 and the claw 4.

In this case, in the conveying direction forward from the position where the swing arm 3 is provided, for example, forward by a distance corresponding to the width of the steel sheet pile 2, as shown in FIG. A stopper 5 is provided that protrudes from the front side into the transport path and temporarily stops the transport movement of the stacked steel sheet piles 2. Such rotation of the stopper 5 can also be performed by driving means such as a motor and a cylinder (not shown).

Incidentally, the stopper 5 may have a structure in which the stopper 5 projects from the lower side or the upper side of the chain conveyor 1 into the transport path by a translational movement instead of the one that performs the rotating movement. Furthermore, with this device,
A pusher 6 is provided to protrude into the transport path and press the third steel sheet pile 2 in the transport direction (FIG. 6). This pusher 6
Can be constituted by dogs attached to a chain driven at the same speed as the chain conveyor 1 and appearing in the transport path for every three steel sheet piles. In addition, it may be configured to be attached to a cylinder or the like and always protrude into the transport path under the bias of a spring, a weight, or the like, or may be configured by a lever that allows the steel sheet pile 2 to pass through. Especially in the latter case, the third steel sheet pile 2
After passing through the pusher 6, the steel sheet pile 2 is transported over a predetermined distance by operating the cylinder or the like at a required speed, for example, at a speed equal to or higher than the traveling speed of the chain conveyor 1. Direction.

Hereinafter, a method of stacking three steel sheet piles in a packing form at the time of shipment by the apparatus configured as described above will be described. First, each sheet pile 2f, 2m, 2b
Is reached by the chain conveyor 1 as shown in FIGS. 1 and 2, most of the first steel sheet pile 2f is on the swing arm 3, and most of the second steel sheet pile 2m is When each of the swing arms 3 and the reversing claws 4 is simultaneously rotated, preferably while the chain conveyor 1 is stopped (or under continuous running), when the revolving claws 4 are positioned on the reversing claws 4, respectively, Then, while lifting the front side of the first steel sheet pile 2f, the rear side of the second steel sheet pile 2m is raised.

The rear end of the steel sheet pile 2 is lifted when the rear edge of the first sheet pile 2f is in contact with the chain conveyor 1, and the second sheet pile 2m is preferably at the front end. This is carried out in a state of being slightly lifted up from the chain conveyor 1 by being hooked on the hooking step 4b of the reversing claw 4, and furthermore,
The turning angle of the swing arm 3 is an angle that does not reach 90 ° as shown in FIG. 4, while the reversing claw 4 is at an angle of 90 ° or more. The second steel sheet pile 2m is attached to the hooks 2a on both sides.
Are stacked on the first steel sheet pile 2f while being slightly offset in the width direction with respect to the engaging portion 2a of the first steel sheet pile 2f. As a result, the second steel sheet pile 2m
With the front surface facing the first sheet pile 2f and the back surface facing obliquely upward, the first sheet pile 2f, and thus,
It will be supported by the swing arm 3.

Next, as shown in FIG. 5, the swing arm 3 is returned to its inverted position, so that the first steel sheet pile 2f and the second steel sheet pile with the front and back surfaces inverted are obtained. 2m are placed on the chain conveyor 1 in a mutually overlapping posture.

Thereafter, based on the re-operation of the chain conveyor 1, the respective steel sheet piles 2 are conveyed (or under continuous operation), and the first and second steel sheet piles 2 overlapping each other are conveyed.
As shown in FIG. 3, when completely passing through the swing arm 3, the stopper 5 is protruded into the transport path as shown in FIG.
Restrains progress. Here, the chain conveyor 1 can be stopped at the same timing as the operation of the stopper 5 and can continue its traveling. In the latter case, the chain conveyor 1 The friction between the first sheet pile 2f and the second sheet pile 2f is inevitable.

By the way, at the time of operation of the stopper 5, for example, the pusher 6 composed of a dog has reached the rear end of the third steel sheet pile 2b, or the pusher 6 composed of a lever has Is allowed to pass through the third steel sheet pile 2b, and is itself in a state of protruding into the transport path.

Therefore, when the chain conveyor 1 is in the continuous running state, the pusher 6 is moved at a speed equal to that of the chain conveyor 1 and at a required speed when the chain conveyor 1 is stopped, for example. In the transport direction, the swing arm 3 is also slightly protruded into the transport path as shown in FIG. 6, whereby the stopper of the third steel sheet pile 2 b pressed by the pusher 6 is moved. Two steel sheet piles 2m suspended by 5
Guide the ride up. FIG. 7 is a diagram showing a required stacking state of the third steel sheet pile 2b performed as described above. In this case, the stopper 5 is provided with the second steel sheet pile 2b.
It has a recess 5a which receives the required offset in the width direction with respect to the other two sheet piles 2 of 2 m.

After that, if the pusher 6 is made of the above-mentioned dog, the pusher 6 moves together with the chain conveyor 1 based on the fall of the stopper 5 to the original position and pushes the three steel sheet piles 2 stacked. Hand them over to the next result step, etc., without disturbing their posture. In addition, the pusher 6
When the pusher 6 is made up of a lever, the pusher 6 is returned to the original position on the rear side in the transport direction by a cylinder or the like, while the stopper 5 is brought down in the same manner, and the three sheet piles 2 in the stacked posture are chained. It is conveyed to the next process only by the conveyor 1. Thus, according to this device, the three piles 2 are automatically transported in a short time and automatically, without the necessity of operation of a crane or the like, while the three piles are being transported. For example, the working time can be reduced to about half that of the prior art.

FIG. 8 is a view showing another embodiment of the apparatus. In the figure, reference numeral 1 denotes the same chain conveyor as described above. Here, between adjacent chain conveyors,
Below these, the swing arm 3 and the reversing claw 4
The swing arm 21 and the lifter 22 are arranged in substantially the same manner as described above, and the lifter 22 having a dimension longer than the reversing claw 4 in the transport direction is provided near the fulcrum 22a of the lifter itself. A reversing arm 23 pivotally supported and pivoted upward in the transport direction and a slide-down restraint arm 24 pivotally supported at a position away from the fulcrum 22a of the lifter 22 and pivoted upward in the transport direction are provided. Set up. Here, each of the reversing arm 23 and the sliding restraint arm 24 is, for example, a cylinder 23 having one end connected to the lifter 22.
By means of a and 24a, it is possible to make a uniform displacement over the intended angle range.

As shown in the plan view of FIG. 8B, both arms 23 and 24 are used to connect the free end of the reversing arm 23 to the sliding restraint arm 24 having a substantially U-shaped plane. By locating between the free ends, the arms 23 and 24 can be brought close to each other as required, and mutual interference can be sufficiently prevented. When three steel sheet piles 2 are stacked as required by such a device, each of the three steel sheet piles 2 conveyed by the chain conveyor 1 has a swing arm, as shown in FIG. When the chain conveyor 1 stops traveling when it reaches one of the upper positions of the lifter 21 and the lifter 22, the swing arm 21 and the lifter 22 are simultaneously rotated, and both of them are moved, as shown in FIG. And a substantially U-shaped relative posture as shown in FIG.

As a result, the first steel sheet pile 2f is moved by the swing arm 21 at the front end in the conveying direction, and the second steel sheet pile 2m is moved by the lifter 22 at the rear end in the conveying direction. Both are greatly lifted, and the third steel sheet pile 2b
The lifter 22 is lifted as a whole by the lifter 22 and is prevented from slipping off from the lifter 22 at the front end, in other words, at the lower end, in contact with the rear end of the second steel sheet pile 2m, that is, the upper end.

Thereafter, each of the reversing arm 23 and the slide-down restraining arm 24 is rotated in opposite directions to each other as shown in FIG. 10 so that the rear end side of the second steel sheet pile 2m and the third sheet pile 2m are rotated. Lifting each of the tip sides of the steel sheet pile 2b, and finally raising the second steel sheet pile 2m, as shown in FIG. 11, based on the further pivoting movement of the reversing arm 23, with its surface side downward,
Then, it is placed on the first steel sheet pile 2f with the back side facing upward.

By the way, at the time of such a leaning displacement of the second steel sheet pile 2m, the third steel sheet pile 2b for supporting the lower end thereof is displaced by being dragged by the second steel sheet pile 2m, Although it will slightly slide down to the swing arm 21 side with respect to the slide-down restraining arm 24, here, the front end of the third steel sheet pile 2b is the second steel sheet pile 2m, and the rear end is Since the third steel sheet pile 2b is still reliably supported by the slide-down restraining arm 24, the possibility of unexpected sliding, falling, etc. of the third steel sheet pile 2b is sufficiently eliminated.

Further, each of the reversing arm 23 and the slide-down restraining arm 24 is sequentially returned to the original position. With the return of the slide-down restraint arm 24, as shown in FIG. , With its back side facing down, rest on the second sheet pile 2m. After a while
Each of the swing arm 21 and the lifter 22 is returned to the original position as shown in FIG. 13, whereby the three steel sheet piles 2 stacked as expected are transferred to the chain conveyor 1.
It is placed on the stack without disturbing the stacking posture, and is conveyed to the next work process by the subsequent reactivation of the chain conveyor 1. As described above, when three steel sheet piles 2 are stacked, the operation time can be reduced to about 1/3 of the conventional technique.

[0023]

As is apparent from the above description, according to the present invention, the automatic inversion and stacking of the steel sheet piles can be performed without the necessity of using a crane or the like to which the magnet suspension is attached. Moreover, work efficiency can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of an apparatus according to the present invention.

FIG. 2 is a schematic side view of a main part of FIG.

FIG. 3 is a side view showing an arrangement mode of a stopper.

FIG. 4 is a side view showing an operating state of a swing arm and a reversing claw.

FIG. 5 is a side view showing an inverted stacking state of a second steel sheet pile.

FIG. 6 is a side view showing an operation state of the pusher.

FIG. 7 is a side view showing a stacked state of three steel sheet piles.

FIG. 8 is a diagram showing an embodiment of another device of the present invention.

FIG. 9 is a side view showing an operating state of the swing arm and the lifter.

FIG. 10 is a side view showing an operation state of a reversing arm and a sliding restraint arm.

FIG. 11 is a side view showing an operation state of a reversing arm and a sliding restraint arm.

FIG. 12 is a side view showing a state in which three steel sheet piles are leaned on a swing arm.

FIG. 13 is a side view showing an inverted stack of three steel sheet piles.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chain conveyor 2 Steel sheet pile 2f, 2m, 2b Steel sheet pile 3,21 Swing arm 3a, 4a Axis 4 Inversion claw 4b Engagement step 5 Stopper 6 Pusher 22 Lifter 22a Support point 23 Inversion arm 23a, 24a Cylinder 24 Sliding restraint arm

Claims (3)

[Claims] 1. An apparatus for stacking three substantially flat steel sheet piles conveyed in a width direction by a conveying means, wherein the steel sheet piles are arranged below the conveying means, and are inserted into a conveying path from a front side in a conveying direction. A pivoting arm that rotates, a reversing claw that is positioned adjacent to the rear side in the transport direction of the pivot arm and that pivots from the rear side in the transport direction into the transport path, and a forward side in the transport direction from the pivot arm. An apparatus for stacking steel sheet piles, comprising: a stopper that protrudes into a conveyance path and temporarily stops the stacked steel sheet piles; and a pusher that presses a third steel sheet pile in the conveyance direction. 2. The steel sheet pile stacking device according to claim 1, wherein a hooking step for lifting the steel sheet pile to a required height is provided on the steel sheet pile contact surface of the reversing claw. 3. An apparatus for stacking three substantially flat steel sheet piles conveyed in a width direction by a conveying means, which is disposed below the conveying means, and is inserted into the conveying path from the front side in the conveying direction. A swinging arm that rotates, a lifter that is positioned adjacent to the rear side in the transport direction of the swinging arm, and that rotates from the rear side in the transport direction into the transport path, and a transporter that is pivotally supported near a fulcrum of the lifter. A stacking device for steel sheet piles, comprising: a reversing arm that pivots forward in the direction of movement; and a slide-down restraint arm that pivotally supports a lifter and is pivoted rearward in the transport direction at a position separated from the fulcrum.