JPH07419Y2 - Article alignment device when unloading a crane - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an article alignment device for properly aligning and placing a suspended load of a crane on a predetermined position on a transfer device.

[Conventional technology]

In steel product manufacturing plants, articles such as steel strip coils are placed on a conveyor such as chain conveyors, roller conveyors, walking beam conveyors, etc., and transferred to the next process in order to carry out the operation safely and smoothly. It is needless to say that it should be properly aligned (centered) and placed on the above predetermined position, and in particular, when it is supplied to the automated processing device, in order to smoothly perform the operation of the automated processing device, It is necessary to transport it while it is properly placed on the.

The unloading work of placing an article at a predetermined position of the carrier using a crane is performed by the driver while visually judging the positional relationship between the carrier on the ground and the suspended load suspended in the space.
It is a conventional general work form to unload according to a signal from a slinging worker on the ground, but the working efficiency is low, and there is a considerable risk to the slinging worker who handles a heavy load.

Recently, as a device to eliminate the sling worker's attendance and carry out the unloading work only by the crane operation of the crane driver,
A mark indicating the center of the saddle of a conveyor, such as a chain conveyor, is displayed on the floor, a center marker is attached to the crane, and the crane is operated so that the projected image of the center marker matches the mark on the floor. The method of unloading is done.

[Problems to be solved by the device]

Compared to the conventional method of collaborating with slingers and crane drivers, the unloading work using the above center marker indicates whether or not the suspended load is displaced and the size of the unloading position. Although the crane driver can visually recognize the crane marker directly from the projected image of the center marker, the troublesome operation of the crane operation is alleviated, but it is not easy to efficiently and accurately repeat the unloading work. For example, the floor surface onto which the projected image of the center marker is projected is not always flat, and the crane driver can accurately view the projected image of the center marker from a distance due to the effects of lighting in the building and other light sources. In many cases, it is difficult to make a decision.

Further, as a crane operation for matching the projected image with the mark on the floor surface, rocking (pendulum motion) of the suspended load occurs each time the suspended load is horizontally shifted in the front-rear direction or the like. The rocking cycle of heavy objects such as steel strip coils lowered to the vicinity of the ground transportation device is long, and the time elapsed until the rocking stops is long, so it takes a long time to unload one article. It costs. Without waiting for the swing to stop, allow the swinging suspended load to be unloaded onto the transport device in anticipation of the swing direction and the amount of swing from immediately above the transport device until it is seated in its predetermined position. It is dangerous to do so, and unlike the prior expectation, the seating position of the suspended load often shifts or shifts.In that case,
The article must be lifted again and the troublesome positioning operation must be repeated, which makes the unloading work even more inefficient.

As a countermeasure, for example, a pusher device may be installed adjacent to the transport device, and an article placed on the transport device with a bias may be pushed out to a normal position by a busher to correct the deviation. A pusher device that can push out heavy objects such as coils against the weight and friction of the contact surface with the transfer device becomes extremely large, and the deviation of the article when unloading is either left or right. Since it is uncertain whether or not it occurs in the direction of, the pusher devices must be symmetrically arranged on the left and right sides of the transport device, and it is not easy in layout to secure such an installation space.

Moreover, if an attempt is made to move the unloaded article against the friction of the contact surface with the carrier, an unreasonable force acts on the carrier, and the heavier the load, the greater the effect. It has a great adverse effect on maintenance. Also, while pushing the article to the normal position, pinch the article from both left and right sides with pushers to prevent the article from falling,
A control mechanism for synchronously interlocking the left and right pushers is also required, and the device configuration becomes complicated.

The present invention provides an alignment device for solving the above-mentioned problems relating to unloading of a crane.

[Means for Solving the Problems]

The device for aligning articles when unloading a crane according to the present invention has a height position facing the suspended load in the descending process from the height position directly above the transport device to sitting at a predetermined position of the transport device. The pad plate member that is placed on one side of the plate and that uses the plate surface as the contact surface for the suspended load to lower the suspended load along the plate surface, and the separation distance of the pad plate member with respect to the predetermined position on the transport device are suspended in advance. It is characterized by having an advancing / retreating drive device connected to a backing plate member for setting according to the width dimension of the load.

[Action]

The backing plate member in the article aligning device of the present invention is a guide member for the suspended load during the descending process from the height position of the crane that has descended to just above the transport device to its seated position on the transport device. Function as. That is, the side surface of the suspended load contacts the plate surface of the contact plate member, and slides down on the plate surface to sit down on the transport device.

The backing plate member, by the advancing and retracting drive device connected to this,
It is possible to adjust the remote distance forward and backward with respect to a predetermined position on the carrier device on which the suspended load is to be seated, and the distance from the predetermined position is adjusted and set in advance according to the width dimension of the suspended load of the crane. The suspended load, which comes into contact with the plate surface of the backing plate member and descends while sliding on the plate surface, is seated in a predetermined position on the transporting device without being displaced or displaced.

The crane driver who performs the unloading work should place the suspended load just above the transport device (at the contact plate member) at a position slightly forward of the plate surface of the contact plate member so that the suspended load does not collide with the contact plate member of the alignment device. (The height position facing the plate surface), the suspended load is horizontally moved toward the contact plate member and brought into contact with the plate surface, and then lowered / sit down on the transport device as it is.
The crane operation is much simpler, simpler, and more complicated than the complicated and cumbersome crane operation such as when performing the alignment while visually observing the projected image of the center marker and the signal of the slinging operator. Accurate unloading work can be carried out efficiently without time loss due to repetition of crane operation and accompanying suspension of swinging of suspended load.

〔Example〕

FIG. 1 shows an embodiment of the alignment device of the present invention.
This will be described with reference to FIG.

(20) is a backing plate member, and (30) is an advancing / retreating drive device for the backing plate member (20) (the figure shows an example of a cylinder). The backing plate member (20) is connected to the cylinder (33) via a slide shaft (32) slidably supported by the holder (31).

(40) is a chain conveyor, chain conveyor (40)
A saddle (41) on which an object to be conveyed (an example of a steel strip coil is shown) is placed is attached at a constant pitch.

The left end (A) of the conveyor is an unloading section for placing the suspended load (steel strip coil) of a crane on an empty saddle (41) waiting at that position, and the conveyor (40) is the conveyor. Every time a suspended load is placed on the saddle (41), it is moved to the right by one pitch by the conveyor drive device (42).

The alignment device (10) is located on the side of the unloading section (A) of the conveyor, and the backing plate member (20) thereof is directly above the conveyor saddle (41) of the unloading section (for example, 10 to 20 cm). ) Is installed at a height position facing the side of the suspended load of the crane that has descended to.

The abutting member (20) is approximately equal to 1/2 of the width dimension (W) of the steel strip coil (C) by the forward / backward drive of the cylinder (33) at the start of the unloading work of the steel strip coil (C). The distance is set to a position away from the conveyor center (Lc).

After setting the position of the backing plate member (20) as described above, unload the steel strip coil (C) with the lifting tool (51) hung on the crane hook (50) as shown in FIG. The steel strip coil (C) is conveyed above the conveyor saddle (41) waiting in the section (A), and the steel strip coil (C) is immediately above the conveyor saddle (41) (a height position facing the plate surface of the padding member (20)). Down to. In order to avoid the risk of the steel strip coil (C) colliding with the backing plate member (C) during the descending process, the steel strip coil (C) is slightly forward from the plate surface of the backing plate member (20) (for example, It is recommended to lower it at a position 10 to 30 cm away.

After lowering the steel strip coil (C) to just above the conveyor saddle (41), at the height position of the steel strip coil (C)
Is horizontally moved at a slow speed toward the contact plate member (20) and brought into contact with the plate surface. Since the steel strip coil (C) does not swing due to the horizontal movement of the crane, and the steel strip coil (C) comes into contact with the plate surface of the pad plate member (20) and stands still at that position, the conveyor saddle ( 41). The steel strip coil (C) descends along the plate surface with the plate surface of the contact plate member (20) as a guide surface, so that the conveyor saddle (with its center in the width direction aligned with the conveyor center (Lc)). 41).

In this way, when the steel strip coil (C) is placed on the conveyor saddle (41) of the unloading section (A) and the suspending tool (51) is detached from the steel strip coil (C), the conveyor (40) moves to the conveyor saddle ( The steel strip coil is moved to the right by 1 pitch of 41), the next conveyor saddle (41) arrives at the unloading section (A), and is newly carried by a crane to the conveyor saddle (41). Are aligned and placed in the same manner as above.

When the steel strip coil (C) is placed on the conveyor saddle (41) of the unloading section (A) and travels rightward by one pitch, one end surface of the steel strip coil (C) is May contact the plate surface of the backing plate member (20) and accelerate the abrasion of the backing plate member (20). If you want to avoid the sliding contact, unload the conveyor saddle (41). Every time I finish
The backing plate member (20) is retracted, and the next new conveyor saddle (41) arrives at the unloading section (A) according to the cycle.
It is preferable that the cylinder (33) repeats the forward / backward movement of moving the backing plate member (20) forward and setting it at a predetermined position.

The back-and-forth driving of the backing plate member (20) may be performed electrically instead of the cylinder. Further, in the above example, the steel strip coil has been described, but it goes without saying that it is not limited to this.

[Effect of device]

According to the present invention, a crane load can be efficiently aligned and accurately placed at a predetermined position of a transport device such as a conveyor without a sled person's intervention and only by the crane operator's operation of the crane. Can be placed. When it is transported to the automated processing equipment of the next process, the alignment accuracy required for the next process can be sufficiently satisfied, thus ensuring the smooth operation of the next process and promoting the automation. Is also effective.

Further, since the aligning device of the present invention is configured such that the backing plate member is used as a guide surface for the suspended load to lower the suspended load, the load acting on this is small, and therefore, the article after being unloaded is On the other hand, it is not necessary to use a large-scale and rigid device such as a device that corrects the positional deviation with a pusher, and it is not necessary to dispose the transport device facing each other on both the left and right sides. Since the control mechanism is also simple, the equipment cost is low, the introduction into the existing layout is easy, and no complicated maintenance is required, which is excellent in practicality.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the alignment apparatus of the present invention and its alignment state, FIG. 2 is a sectional view taken along the line I--I of FIG. 1, and FIG. 3 is a side view of FIG. 10: Positioning device, 20: Pad plate member, 30: Forward / backward drive device, 4
0: conveyor, 41: conveyor saddle, 50: crane hook,
51: Hanging equipment, C: Steel coil.

Claims (1)

[Scope of utility model registration request] 1. A plate surface disposed on one side of the transport device having a height position facing a suspended load in a descending process from sitting at a position directly above the transport device to sitting at a predetermined position on the transport device. To set the distance between the contact plate member, which is the contact surface of the suspended load and which lowers the suspended load along the plate surface, and the spacing plate member with respect to a predetermined position on the transport device in advance according to the width dimension of the suspended load. And an advancing / retreating drive device connected to the backing plate member of the article.