JP4071591B2 - Load transfer device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load transfer device for transferring a load on a transfer conveyor to a shelf or another conveyor in a plane, and more specifically, to transfer a load that is unevenly grounded and unbalanced in weight while maintaining a balance. It is related to the technology.
[0002]
[Prior art]
Conventionally, when a load transfer device using a conveyor transfers a load to a shelf or another conveyor, the load acting on the mounting surface is not necessarily uniform even when the bottom surface of the cardboard load is slightly deformed. Therefore, depending on the frictional force difference due to the uneven grounding and the unbalanced weight, the transfer direction bends, and depending on the contents of the load, it may be difficult to transfer straight.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these conventional problems, and to transfer a load using a conveyor capable of moving straightly in and out of a load with uneven grounding and unbalanced weight while maintaining balance. Is to provide.
[0004]
[Means for Solving the Problems]
The configuration of the present invention that solves this problem is as follows.
1) in the transfer direction of the load on the freely movable base retractable provided conveyor, a transfer device of the luggage which an auxiliary conveyor for assisting transfer of the load to the right and left front end portion of the conveyor, the Auxiliary conveyor is provided with a drive shaft in the width direction of the transport conveyor that rotates by obtaining the transport force of the transport conveyor at the tip of the transport conveyor, and the holding arm is placed on the shelf side from the transport conveyor frame at the intermediate position of the drive shaft Projecting horizontally to the support arm and pivoting on the holding arm so that the middle of the rotary shaft parallel to the drive shaft can be tilted. Belt pulleys are attached to both ends of the drive shaft and the rotary shaft. A small belt conveyor is constructed by stretching a plurality of thin belts between each belt pulley and each belt pulley of the rotating shaft, and the belt pulley on the rotating shaft side of the small belt conveyor moves up and down around the holding arm for conveyance The surface of the conveyor The auxiliary conveyor can be tilted in the width direction, and the tip of the auxiliary conveyor can be tilted back and forth around the width center of the conveyor so that the load is evenly applied to the transport surface even when the load on the transport surface is uneven. And a load transfer device characterized in that the load transfer device can prevent bending in the conveyance direction of the load. 2) The load transfer device described in 1) above is placed on a lifting rack of a stacker crane that runs on a predetermined track. Attached stacker crane 3) Vertical conveyor with the load transfer device described in 1) above mounted on a load receiving stand of a vertical conveyor that moves up and down in the vertical direction to load and unload a multistage shelf 4) A predetermined floor surface A traveling carriage in which a load receiving platform having an elevating mechanism is provided on a traveling carriage that is self-propelled and the load transfer device described in 1) above is mounted on the load receiving platform .
[0005]
[Action]
According to the present invention, when a load is transferred to a shelf or another conveyor, the conveying surface is tilted so that the side with a large load on the auxiliary conveyor sinks and the side with a small load floats due to uneven grounding and weight of the load. By doing so, the balance of the frictional force is maintained while correcting the load difference, so that the load transfer direction is transferred straight without significant bending.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The small belt conveyor constituting the auxiliary conveyor of the present invention is preferable because a structure in which a plurality of narrow belts are stretched between belt pulleys can suppress twisting of the belt due to tilting and prevent dropping from the belt pulley.
When the transfer device is installed on the lifting platform of the stacker crane, the load can be transferred to the left and right shelves arranged on both sides of the stacker crane by providing an auxiliary conveyor at each end of the transfer conveyor. .
The load transfer device of the present invention can be applied to loads such as containers, pallets, buckets, etc., but is particularly suitable for corrugated cardboard loads and is a mechanism useful for mounting on a lifting rack of a stacker crane. It can also be applied to traveling carts.
Embodiments of the present invention will be specifically described below with reference to the drawings.
[0007]
【Example】
Example 1 (see FIGS. 1 to 9)
A first embodiment shown in FIGS. 1 to 9 is an example in which the present invention is installed on a lifting rack of a stacker crane so that a load can be transferred to a shelf.
FIG. 1 is an explanatory diagram of an auxiliary conveyor according to the first embodiment.
FIG. 2 is a perspective view of the stacker crane according to the first embodiment.
FIG. 3 is a side view of the lifting platform according to the first embodiment.
FIG. 4 is a plan view of the lifting platform of the first embodiment.
FIG. 5 is a plan view of the transport conveyor and the auxiliary conveyor according to the first embodiment.
FIG. 6 is a plan view of the stacker crane and the shelf board according to the first embodiment.
FIG. 7 is an explanatory diagram illustrating a load storing process on the shelf board according to the first embodiment.
FIG. 8 is an explanatory diagram illustrating a load taking-in process from the shelf board according to the first embodiment.
FIG. 9 is an explanatory diagram illustrating the operation of the auxiliary conveyor according to the first embodiment.
[0008]
In the figure, 1 is a lifting frame, 1a is a frame constituting the lifting frame, 1b is a rail, 1c is a motor that drives the conveyor in the sliding direction, 1d is a gear that meshes with a shelf plate of the conveyor, 2 is a conveyor 2a is a movable base that slides on the rail, 2b is a rack that meshes with the gear of the motor and transmits driving force, 2c is a motor that drives the conveyor, 2d is a roller, 2e is a conveyor belt, 2f is a chain, 3 is an auxiliary conveyor, 3a is a drive belt pulley, 3b is a belt pulley, 3c is a conveyor belt composed of a plurality of thin belts, 3d is a drive shaft that links the drive belt pulleys and interlocks with the drive of the conveyor, 3f is Rotating shaft for connecting and linking each belt pulley, 3g is a holding shaft that pivots around the center of the rotating shaft so that each belt pulley can move up and down in the opposite direction. Beam, 4 is the mast, the trajectory of the stacker crane 5, 6 shelves, C is the stacker crane, n represents load, W is heavy.
[0009]
As shown in FIGS. 1 to 6, a movable base 2 a that can be moved forward and backward in the load transfer direction is provided on the lifting platform 1 of the stacker crane C, and a plurality of rollers 2 d arranged in parallel on the movable base 2 a are transported to a belt. 2e and a conveyor 2 configured by stretching a chain 2f around the shaft end are provided, and auxiliary conveyors 3 are respectively attached to the left and right ends of the conveyor 2.
The auxiliary conveyor 3 is provided with a driving shaft 3d that rotates by obtaining the driving force of the conveying conveyor 2 in the width direction of the conveying conveyor 2, and a frame holding arm 3g that constitutes the conveying conveyor 2 at an intermediate position of the driving shaft 3d is a shelf. It protrudes horizontally on the plate side, supports the middle of the rotary shaft 3f so that it can tilt on the holding arm 3g, and belt pulleys 3a and 3b are attached to both ends of the drive shaft 3d and the rotary shaft 3f. A plurality of conveyor belts 3c are stretched between the drive belt pulley 3a and the belt pulley 3b.
[0010]
In the first embodiment, when loading, the load n carried into the three-dimensional warehouse is placed on the transport conveyor 2 of the stacker crane C, and the load n is determined by operating the stacker crane C with a management computer (not shown). It is transported to the position of the shelf board 6.
Next, as shown in FIG. 7A, the transport conveyor 2 and the auxiliary conveyor 3 are raised to a position H higher than the shelf plate 6, and the transport conveyor 2 and the auxiliary conveyor 3 are slid to the closest position to the shelf plate 6.
Next, as shown in FIG. 7B, the conveyor 2 and the auxiliary conveyor 3 are respectively driven to transfer the load n to the shelf 6 and the front of the load n is landed on the shelf 6 and enters in an inclined state. To do.
At this time, as shown in FIG. 9, when the heavy object W is disposed in the load n so as to be offset, conventionally, the load acts locally and the bending is caused in the transfer direction due to the frictional force difference. However, there is a problem that it cannot be smoothly transferred due to being caught by the constituent members of the conveyor. However, in this embodiment, the bottom surface of the load n pushes down the belt pulley 3b on the large load side and the other belt pulley 3b on the small load side relatively pushes up the bottom surface of the load n. On the other hand, the frictional force on the small load side increases while the load acts evenly, the balance is maintained at a certain inclination angle, and the load n is transferred almost linearly.
Next, as shown in FIG. 7C, when a part of the bottom surface on the front end side of the shelf board 6 of the load n arrives at a position ΔL protruding from the shelf board 6, the driving of the transport conveyor 2 and the auxiliary conveyor 3 is stopped. Lower.
Then, as shown in FIG. 7 (d), the conveying conveyor 2 and the auxiliary conveyor 3 are slid to their original positions so that a part of the bottom surface of the load n is placed in a state protruding from the front end of the shelf board 6. Storage is complete.
[0011]
At the time of taking-in, as shown in FIG. 8A, the conveyor 2 and the auxiliary conveyor 3 are slid to the lower side of the protruding bottom surface of the load n stored at a position lower than the shelf plate 6.
Next, as shown in FIG. 8 (b), the conveying conveyor 2 and the auxiliary conveyor 3 are raised to lift the protruding bottom surface of the load n, and are separated from the shelf plate 6 surface except for a part of the bottom surface of the load n. To stop the climb.
Next, as shown in FIG. 8C, the conveyor 2 and the auxiliary conveyor 3 are driven to transfer the load n to the stacker crane C side, and the load n is inclined by the frictional force between the load n and the auxiliary conveyor 3. Advance to the outside of the shelf 6 in the state. At this time, when the heavy load W is arranged in the load n in a state where it is offset, the auxiliary conveyor 3 shows the same operation as when stored and the load n is transferred almost linearly.
Then, as shown in FIG. 8 (d), the load n is completely separated from the shelf 6 and taken in by being transferred onto the transport conveyor 2 and the auxiliary conveyor 3, and the stacker crane C is operated by a management computer (not shown). It is transported to the loading / unloading position and discharged from the three-dimensional warehouse.
[0012]
In the first embodiment, the belt pulley of the small belt conveyor maintains the balance while correcting by moving the load difference of the load of uneven grounding and unbalanced weight up and down in the opposite direction. The loading direction could be smoothly taken in and out without bending.
[0013]
Example 2 (see FIGS. 10 and 11)
The second embodiment shown in FIGS. 10 and 11 is provided with a notch portion at the front end of the load storage position of the shelf board in the first embodiment so that a part except the corner portion of the bottom surface of the load is exposed in the notch portion. It is an example of the stored form.
FIG. 10 is a plan view of a stacker crane and a shelf board according to the second embodiment.
FIG. 11 is a partially enlarged plan view of the stacker crane and the shelf board according to the second embodiment.
In the figure, reference numeral 6a denotes a notch formed with a width X larger than the width Y of the auxiliary conveyor.
[0014]
In the second embodiment, the conveyor 2 and the auxiliary conveyor 3 are raised to a position higher than the shelf 6 and are slid so as to insert the auxiliary conveyor 3 into the notch 6a of the shelf 6 as shown in FIG. n is taken in and out, and the load n can be easily taken in and out by the auxiliary conveyor 3 without protruding from the front end of the shelf 6. The other specific loading / unloading steps and the effects of the auxiliary conveyor 3 are the same as those in the first embodiment.
[0015]
【The invention's effect】
As described above, according to the present invention, when transferring a load to a shelf or another conveyor, the belt pulleys on the pivoting side of the small belt conveyor are moved in the opposite direction due to uneven contact of the load and load imbalance. By moving up and down, it is possible to provide a load transfer device that can maintain a balance while correcting the load difference and can move straightly without bending the transfer direction of the load.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an auxiliary conveyor according to a first embodiment.
FIG. 2 is a perspective view of the stacker crane according to the first embodiment.
FIG. 3 is a side view of the lifting platform according to the first embodiment.
FIG. 4 is a plan view of the lifting platform according to the first embodiment.
5 is a plan view of a transport conveyor and an auxiliary conveyor according to Embodiment 1. FIG.
FIG. 6 is a plan view of a stacker crane and a shelf board according to the first embodiment.
FIG. 7 is an explanatory diagram illustrating a load storing process on a shelf board according to the first embodiment.
FIG. 8 is an explanatory diagram showing a load taking-in process from a shelf board in Example 1.
FIG. 9 is an explanatory diagram showing the operation of the auxiliary conveyor according to the first embodiment.
FIG. 10 is a plan view of a stacker crane and a shelf board according to the second embodiment.
11 is a partially enlarged plan view of a stacker crane and a shelf board according to Embodiment 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lift stand 1a Frame 1b Rail 1c Motor 1d Gear 2 Conveyor 2a Movable base 2b Rack 2c Motor 3 Auxiliary conveyor 3a Drive belt pulley 3b Belt pulley 3c Conveyor belt 3d Drive shaft 3f Rotating shaft 3g Holding arm 4 Mast 5 Track 6 Shelf plate 6a Notch C Stacker crane n Load W Heavy object

Claims (4)

The conveyor provided on retractably movable platform in the transfer direction of the load, a transfer device of the luggage which an auxiliary conveyor for assisting transfer of the load to the right and left front end portion of the conveyor, the auxiliary conveyor However, a drive shaft that rotates by obtaining the driving force of the transfer conveyor is provided at the front end of the transfer conveyor in the width direction of the transfer conveyor, and the holding arm is horizontally placed on the shelf side from the transfer conveyor frame at an intermediate position of the drive shaft. The belt is supported by the holding arm so that the middle of the rotary shaft parallel to the drive shaft can be tilted, and belt pulleys are attached to both ends of the drive shaft and the rotary shaft. A small belt conveyor is constructed by stretching a plurality of thin belts between the pulley and each belt pulley of the rotating shaft, and the belt pulley on the rotating shaft side of the small belt conveyor moves up and down around the holding arm to move the conveying surface Conveyor width To allow tilting, the load the auxiliary conveyor so as to uniformly load the conveying surface, even if the front and rear uneven load of the load to the conveying surface can tilt back and forth in the width center around its tip conveyor A load transfer device characterized by having a structure capable of preventing bending in the conveying direction. A stacker crane, wherein the load transfer device according to claim 1 is mounted on a lifting rack of a stacker crane that travels on a predetermined track. A vertical transfer machine in which the load transfer device according to claim 1 is mounted on a load receiving stand of a vertical transfer machine that moves up and down in a vertical direction and loads a product into and out of a multistage shelf. A traveling cart provided with a load receiving platform having an elevating mechanism on a traveling cart that self-propels on a predetermined floor surface, and the load transfer device according to claim 1 is mounted on the load receiving platform.

Images