JP2869884B2 - Lifting device in the pallet transfer device for loading and unloading cargo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting and lowering device for a loading / unloading pallet transfer device for loading and unloading empty pallets on which loads are not loaded and pallets mounted with loads on each floor.

[0002]

2. Description of the Related Art Conventionally, conveyors on which pallets for carrying cargo are placed are arranged in upper and lower tiers, and there are elevators for raising and lowering the conveyor between an upper floor and a lower floor. On the floor surface, similarly to the above, a fixed support provided with conveyors on which pallets are placed in upper and lower stages, and an elevating table composed of a pantograph mechanism having a conveyor on the upper surface are provided, and the elevator is stopped in a stopped state. A configuration in which each conveyor is driven individually to transfer a mounted pallet loaded with luggage and an empty pallet not loaded with luggage horizontally to transfer empty pallets and carry in / out luggage between conveyors at the same time. Japanese Patent Application Laid-Open No. 63-1
This is known in Japanese Patent Application Laid-Open No. 60920 and JP-A-64-48717.

[0003]

According to the above-mentioned conventional construction, for example, in the case of transporting goods by using a truck, the truck is operated on a floor surface and mounted on an empty pallet on a lift table or lifted. In order to transfer the trolley from the pallet mounted on the pedestal to the floor, the trolley mounting surface on the elevating platform must be flush with the floor. At the lowest position of the lifting platform, it was necessary to provide a dug-down portion so that its mounting surface was equal to the floor surface. For this reason, the provision of the dug-down portion on the floor surface, particularly on the upper floor, may not only cause the floor panel to be weakened, but also make it difficult to install the apparatus itself.

[0004]

Therefore, in the present application, the position of the pallet when loading and unloading cargo to and from the floor can be made as close to the floor as possible, instead of the conventional elevator. The present invention provides a simple elevating device and omits the configuration of a dug-down section that is conventionally required. That is, a pair of front and rear apparatus main bodies having an elevating mechanism which is erected on the floor surface in a direction orthogonal to the transfer direction and reciprocates in the height direction, and along the front surface of the apparatus main body by the elevating mechanism. A mounting member that moves up and down, and a transfer device that is mounted on the mounting member and that supports a pallet for loading and unloading and transfers the pallet in the width direction of the apparatus main body. A support member attached to the member and extending horizontally in the transfer direction, and spaced along the longitudinal direction of the support member, and
The lower end is composed of a plurality of transfer members rotatably fixing a disk supporting the pallet, and a drive mechanism for simultaneously rotating the disks of the transfer member in the same direction by motor driving, the disk having an umbrella-like upper surface. The load carrying pallet has an inclined surface, and the lower surface of the pallet for loading and unloading is parallel to the inclined surface of the upper surface of the disk of the transfer member. In this case, a contact member inclined upward and outward is attached.

[0005] In the above, the reciprocating range of the lifting mechanism is at least the lowest position where the disk of the transfer member is closest to the floor, and the position where the support level of the disk matches the support surface of the upper conveyor of the transfer device. Range.

Specifically, the main body of the apparatus has a frame standing on the floor, and an elevating mechanism is disposed at an intermediate position in the width direction of the frame, and is elevated by a reversible drive motor. And a pair of left and right guide rails arranged in parallel at the left and right positions in the width direction of the frame with the chain belt mechanism in the middle of the chain belt mechanism. The mounting member is connected via a connecting member, and the right and left rear surfaces of the mounting member are slidably engaged with the pair of left and right guide rails via an engaging member. The drive mechanism includes a chain wheel provided coaxially with the disk of the transfer member, a driven chain wheel rotated by a motor, and a chain belt continuously meshing with each of the chain wheels.

[0007]

The lifting device according to the present invention is placed on the floor so as to be close to the fixed support in the transporting device for the pallet for loading and unloading cargo, and to face each other in a direction perpendicular to the transport direction. In addition, the transfer mechanism supports an empty pallet in advance, and in a standby state for receiving the carriage, the disk is placed at the lowest position closest to the floor by the lifting mechanism. Then, when transferring the trolley on which the load is placed from this standby state to the upper conveyor of the fixed support using an empty pallet, first use the slope table on the empty pallet supported by the transfer mechanism. The truck is mounted. In this case, since the pallet support level is at the lowest position closest to the floor surface, and the height of the disk can be lower than that of other transfer means such as rollers and trochanters, the slope table should have a very gentle inclination angle. It is.

Next, from this state, the transfer mechanism is raised by the elevating mechanism to a position facing the upper conveyor of the fixed support, and then the disk is rotated by the drive mechanism to transfer the mounted pallet from the transfer mechanism to the upper conveyor of the fixed support. Forward.

When transferring an empty pallet from the lower conveyor of the fixed support to the transfer device, the transfer mechanism is lowered to a low position facing the lower conveyor by an elevating mechanism, and in this state, the lower conveyor of the fixed support is transferred. And the disk is rotated by the drive mechanism. The empty pallet is then transferred from the lower conveyor of the fixed support to a lower transfer mechanism. Next, from this state, the transport mechanism is lowered by the lifting mechanism to the lowest position where the disk is closest to the floor surface, thereby returning to the standby state for receiving the cart on the empty pallet.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a general view of a transport device for a pallet for loading / unloading pallets. A tower 1 vertically extending from a lower floor F1 to an upper floor F2 has a table or a housing which moves up and down via a chain 2 therein. A carrier 3 is suspended from the tower 1 by a chain 2 driven by a drive unit 4. A pair of conveyors 5 for horizontally moving the load carrying-in / out pallet 20 facing each other in a front-rear direction (a direction perpendicular to the paper surface) are provided in the carrier 3.
a, 5b and 6a, 6b extend horizontally in the left-right direction and are arranged in two upper and lower stages.

On the upper and lower floors F1 and F2, the upper conveyors 5a and 5b and the lower conveyors 6a and 6b are located at positions close to the tower 1 when the carrier 3 stops.
And a fixed support 9 in which a pair of front and rear conveyors 7a, 7b and 8a, 8b capable of transporting the pallet 20 in the left-right direction are fixedly arranged in two upper and lower stages.

Further, a transfer mechanism 10 is provided which is capable of transferring the pallet 20 in the left-right direction while being opposed to the front and rear of a position close to the fixed support 9 and having the same transfer level as the lower conveyors 8a and 8b. Lifting mechanism for raising and lowering the transfer mechanism 10 between a low position, a high position having the same transfer level as the upper conveyors 7a and 7b, and a lowest position closest to the floor and lower than the low position. 12
Is installed on the floor.

As shown in FIGS. 2 and 3, a pallet 20 on which a load or a trolley 15 on which the load is mounted is loaded and unloaded is provided. The sleeves 23 are attached to the front and rear surfaces of the board-like body 21 respectively, and the vertical pieces are attached to the lower surfaces of the horizontal pieces 23a of the sleeve members 23 by bolts and nuts 24. An abutting member 25 outwardly inclined forward at an angle of about 8 degrees, and
1 and a mounting plate 26 which is attached to the front and rear positions of the lower surface and supported by the upper surface of each conveyor.

An apparatus main body 13 constituting the apparatus of the present invention is shown in FIG.
As shown by 5 and 6, an elevating mechanism 12 for elevating and lowering the transfer mechanism 10 is provided in a vertically rectangular and thin hollow frame 30. The frame 30 has a bottom portion and a floor portion. L so that the installation member 31 for standing on the surface projects rearward.
The frame wheel 30 is vertically arranged at the center position in the width direction inside the frame body 30 configured as described above.
And a chain belt mechanism 37 in which a chain belt 35 reciprocatingly driven by a reversible drive motor 34 installed on the upper surface of the mounting member 31 is stretched via a guide chain wheel 36 therebetween. A pair of guide rails 3 are arranged in parallel with each other at the left and right positions in the width direction of the front surface of the frame body 30 with the chain belt mechanism 37 in the middle.
The lifting mechanism 12 is constituted by the chain belt mechanism 37 and a pair of left and right guide rails 38.

A mounting member 39 for raising and lowering the front surface of the elevating mechanism 30 by the chain belt mechanism 37 is formed of a plate member longer than the interval between the guide rails 38. The chain belt 35 is connected to the chain belt 35 via a connecting member 41 penetrating a vertically extending slit 40 provided at a position facing the front chain belt 35, and the pair of guide rails 38 is provided at the left and right positions thereof. An engagement member 42 that slidably engages is attached.

A transfer mechanism 10 which supports the load carrying-in / out pallet 20 so as to be transferable is fixed to a fixing member 43 protruding from a right and left position in the width direction of the front surface of the mounting member 39 and extends horizontally in the left-right direction. A U-shaped support member 44, a plurality of transfer members 45 spaced along the longitudinal direction of the support member 44 and supporting the pallet 20 and transferring the pallet 20; And a driving mechanism 50 for driving the motor.

As shown in FIGS. 6 and 7, the transfer member 45 has a disk 51 having an umbrella shape inclined at an angle of, for example, about 8 degrees at its lower end so that its upper surface coincides with the inclination of the lower surface of the contact member 25. The rotating shaft 52 provided is rotatably supported by a thrust bearing 54 and a radial bearing 55 with respect to a bearing member 53, and the transfer member 4 thus configured.
5 is fixed to the inner surface of the support member 44 at regular intervals by bolts and nuts 56, and the drive mechanism 50 for driving the transfer member 45 is, as shown in FIG. A chain wheel 57 having a small diameter and a tensioning chain wheel 59 facing each other at right and left positions of a guide chain wheel 58 and a drive chain wheel 61 which will be described later. A chain belt 62 running by a drive chain wheel 81 driven by a drive motor 60 installed at the center of the front surface of the support member 44
And the disk 56 is simultaneously rotated in the same direction by the driving of the drive motor 60. In the drawing, reference numeral 70 denotes a cover which is attached to the support member 44 and can be covered from the front surface to the position where the chain wheels 57 are arranged.

In this embodiment, the contact member 25 is attached to the lower surface of the sleeve member 23 with the bolts and nuts 24 on the pallet 20.
As a method of attaching to the lower surface of the horizontal piece 23a, it may be fixed by an adhesive or by welding, and a contact member is preferably a synthetic resin or a metal having a large friction coefficient, or a surface treatment so as to increase the friction coefficient. Needless to say, it may be made of a material subjected to the above.

Next, the apparatus of the present invention is used, that is, the apparatus main body 13 is opposed to the pallet 20 in a direction perpendicular to the transfer direction, and
FIGS. 9A to 9E show a transfer process of the pallet 20 in the transfer device for the pallet 20 for loading and unloading the cargo, which is configured so that the front and rear contact members 25 are erected on the floor with an interval suitable for being placed on the upper surface of the disk 56. It will be described in detail based on. FIG. 9A shows a standby state in which the disk 51 of the transfer mechanism 10 is at the lowest position closest to the floor surface and the contact member 25 of the empty pallet 20 is supported on the upper surface of the disk 51 (state shown in FIG. 9E). , A carriage 15 on which luggage is placed using a slope table 11 is mounted on a pallet 20, and the conveyor 6 at the lower stage of the carrier 3
2 shows a state in which empty pallets 20 are placed on the conveyors 8a and 8b at the lower stage of the fixed support 9, respectively.

In this state, the drive motor 34 of the elevating mechanism 12 is driven to move the transfer mechanism 10 up and down from the lowest position to a high position at the same support level as the upper conveyors 7a and 7b of the fixed support 9 (FIG. 9B). ). In this state, when the drive motor 60 of the transfer mechanism 10 and each of the upper conveyors 5a, 5b and 7a, 7b of the carrier 3 and the fixed support 9 are driven in the forward direction, the chain belt 62 runs and the respective disks 51 are the same. 9C, so that the pallet 20 of the mounting is moved from the transport mechanism 10 to the upper conveyor 7 of the fixed support 9 at the same height position as shown in FIG. 9C.
a, 7b, and in this state the drive motor 3
4 by driving the lifting mechanism 12 in the opposite direction to the above, so that the transfer mechanism 10 is moved to the lower conveyor 8.
It descends to the low position of the same height as a and 8b.

On the other hand, each of the upper conveyors 5a, 5b and 7a,
9D, the mounted pallet 20 is transferred from the upper conveyor of the fixed support 9 supporting it to the upper conveyors 5a and 5b of the carrier 3 as shown in FIG. 9D. When the transfer mechanism 10 reaches the low position, the drive motor 60 and the lower conveyors 6a and 6b of the transport body 3 and the lower conveyors 8a and 8b of the fixed support 9 are driven in opposite directions. Then, the empty pallet 20 is moved from the lower conveyors 6a and 6b of the carrier 3 to the lower conveyor 8 of the fixed support 9.
a, 8b, and the lower conveyors 8a, 8
b to the transfer mechanism 10 respectively. In the above, the transport body 3 on which the mounting pallet 20 is mounted rises from the lower floor F1 to the upper floor F2 by driving of the driving unit 4,
On the upper floor F2, the upper and lower conveyors 5 of the carrier 3
a, 5b, 6a, 6b, the upper and lower conveyors 7a, 7b, 8a, 8b of the fixed support 9 and the transfer mechanism 10 transfer the mounted pallet and the empty pallet 20, respectively, and With the transfer mechanism 10 of the apparatus main body 13 lowered to the lowest position, the carriage 15 placed on the pallet 20 moves the slope base 11 on the floor of the upper floor F2.
Conveyed through.

At the position of the upper floor F2, the carrier 3 located at the upper floor F2 after the delivery of the mounting pallets and the empty pallets 20 is transferred to the lower conveyor 6
a, the driving unit 4 with the empty pallet 20 placed on the
To the lower floor F1, and as shown in FIG. 9E, the transport body 3 is moved to the upper and lower conveyors 5a, 5b, 6a, 6b.
Height positions of the fixed support 9 and the lower conveyor 7a,
The transfer mechanism 10 that stops when the height position of the pallets 7b, 8a, and 8b coincides with each other and that receives the empty pallet 20 from the lower conveyors 8a and 8b of the fixed support 9 is moved up and down by the lifting mechanism 1
By 2, the disk 51 descends to the lowest position closest to the floor and returns to the standby state.

That is, in the present application, when transferring the mounted pallet 20 to and from the floor, the transfer mechanism 10 places the disk 51 at the lowest position closest to the floor,
When the mounted pallets 20 are transferred to and from the upper conveyors 7a and 7b of the fixed support 9, they are opposed to the positions of the upper conveyors 7a and 7b, and are transferred to the lower conveyors 8a and 8b of the fixed support 9. When the empty pallet 20 is to be delivered between the two, the lifting mechanism 12 is driven and controlled so as to face the lower conveyors 8a and 8b.

Further, in the present application, the upper surface of the disk 51 is inclined in an umbrella shape, and the lower surface of the contact member 25 that comes into contact with the upper surface is inclined outward and upward so as to match the inclined surface of the upper surface of the disk 51. Therefore, as shown in FIG. 10, the contact portion P between the disk 51 and the contact member 25 is always on the radius line of the disk 51 perpendicular to the longitudinal direction of the contact member 25 regardless of the rotation of the disk 51. Therefore, the rotation of the disk 51 always acts on the contact member 25 in the longitudinal direction thereof, so that the pallet 20 is efficiently transferred in one direction by the drive of the transfer mechanism 10.

[0025]

As described above in detail, according to the lifting device of the present invention, the disk can be brought as close as possible to the floor surface and the pallet supporting level can be minimized. It is not necessary to provide a digging part on the surface, so there is no danger that the floor will be weakened, and the slope of the slope base used when transferring the bogie between the floor and the transfer mechanism will be extremely gentle. In particular, according to the configuration of the third aspect, the moving mechanism can be moved up and down very smoothly, and according to the configuration of the fourth aspect, the rotational drive of the disk can be performed. It has advantages such as smoothness.

[Brief description of the drawings]

FIG. 1 is a partially omitted plan view of a transport device for a pallet for carrying out a load;

FIG. 2 is a plan view of a pallet with a part omitted.

FIG. 3 is a side view of a pallet partially omitted.

FIG. 4 is a front view of the apparatus of the present invention with a part omitted.

FIG. 5 is a side view of the apparatus of the present invention with a part omitted.

FIG. 6 is a partially enlarged side view of the device of the present invention.

FIG. 7 is an enlarged sectional view of a transfer mechanism.

FIG. 8 is a plan view of a partial cross section of the transfer mechanism.

FIG. 9A is a diagram showing a transport process.

FIG. 9B is a diagram showing another conveyance process.

FIG. 9C is a diagram showing still another conveyance process.

FIG. 9D is a view showing still another conveyance process.

FIG. 9E is a view showing still another conveyance process.

FIG. 10 is a partial plan view showing the relationship between a disk and a pallet.

[Explanation of symbols]

 3 Conveyor 5a, 5b, 7a, 7b Upper Conveyor 6a, 6b, 8a, 8b Lower Conveyor 9 Fixed Support 10 Transferring Mechanism 12 Lifting Mechanism 13 Device Main Body 20 Pallet 23 Sleeve Member 25 Contact Member 30 Frame 37 Chain Belt Mechanism 38 guide rail 39 mounting member 41 connecting member 42 engaging member 43 fixing member 44 supporting member 45 transfer member 50 drive mechanism 51 disk 53 bearing member 60 drive motor 82 chain belt 70 cover

Claims (4)

(57) [Claims] 1. A pair of front and rear apparatus main bodies having an elevating mechanism which is erected on a floor surface in a direction orthogonal to a transfer direction and reciprocates in a height direction, and the apparatus main body is provided by the elevating mechanism. A mounting member that moves up and down along the front surface of the device, and a transfer mechanism that is mounted on the mounting member and that supports a pallet for loading and unloading and transfers the pallet in the width direction of the apparatus main body. A support member attached to the attachment member and extending horizontally in the transfer direction, and a plurality of disks, which are spaced apart along the longitudinal direction of the support member and which rotatably fix a disk supporting the pallet at the lower end. Transfer member, and a drive mechanism that simultaneously rotates the disk of the transfer member in the same direction by driving a motor, the disk is formed by inclining the upper surface in an umbrella shape, and the pallet for loading and unloading the baggage, Luggage placement An abutting member that is inclined outward and upward so that the lower surface matches the inclined surface of the upper surface of the disk of the transfer member is attached to the lower surface of a horizontal piece that projects horizontally outward along the front and rear edges of the plate. A lifting / lowering device in a pallet transport device for loading / unloading cargo. 2. The reciprocating range of the lifting mechanism is at least the lowest position where the disk of the transfer member is closest to the floor surface.
2. The lifting device for a transport device for a pallet for loading and unloading pallets according to claim 1, wherein the support level of the disk is within a range corresponding to a position matching the support surface of the upper conveyor of the transport device. 3. The apparatus body has a frame standing on the floor, and an elevating mechanism is disposed at an intermediate position in the width direction of the frame, and is vertically moved by a reversible drive motor. A chain belt mechanism that reciprocates and a pair of left and right guide rails arranged in parallel at the left and right positions in the width direction of the frame with the chain belt mechanism in the middle. The luggage unloading device according to claim 1 or 2, wherein the back surface is connected via a connecting member, and the left and right positions of the mounting member are slidably engaged with the pair of left and right guide rails via an engaging member. Elevating device in the transfer device for input pallets. 4. A drive mechanism comprising a chain wheel provided coaxially with a disk of a transfer member, a driven chain wheel rotated by a motor, and a chain belt continuously meshing with each of said chain wheels. 4. The lifting device in the transport device for a pallet for loading and unloading cargo according to 2 or 3.