JP3582827B2 - Pallet-based load carrier - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load transport device for loading and transporting a load on a pallet, and more particularly to a load transport device using a pallet for transporting a load to a target floor using a lifting / lowering transport mechanism.
[0002]
[Prior art]
The applicant of the present invention has previously proposed a pallet-based load transfer device having a configuration shown in FIGS. 15 and 16. The load transport device shown in the figure includes a lift transport mechanism 101 for vertically moving a lift table 100 between a plurality of floors F1 to F3 to transport a load, and an entrance of each floor F1 to F3 of the lift transport mechanism 101. And a loading / unloading mechanism 102 to be installed. A first transport conveyor 103 for transporting a loaded pallet (hereinafter referred to as a “loading pallet”) to and from a loading / unloading mechanism 102 and a load are loaded on the lifting table 100. A second transport conveyor 104 for transporting empty pallets (hereinafter, referred to as “empty pallets”) to and from the loading / unloading mechanism 102 is provided in two upper and lower stages.
[0003]
The loading / unloading mechanism 102 includes a delivery mechanism 105 and an unloading mechanism 106. The delivery mechanism 105 has a loading pallet and a loading pallet between the first and second transport conveyors 103 and 104 of the lifting table 100. First and second transport conveyors 107 and 108 for transporting an empty pallet are provided in two upper and lower stages.
The unloading mechanism 106 includes an elevating mechanism 109 that moves the transport conveyor 110 up and down between the first transport conveyor 107 and the second transport conveyor 108 of the delivery mechanism 105. By driving in the reverse direction, the loaded pallet or the empty pallet is transported between the first and second transport conveyors 107 and 108 of the transfer mechanism 105.
[0004]
In the load transport device having the above-described configuration, the first and second transport conveyors 103 and 104 of the lifting table 100 are driven in opposite directions to each other, and the first transport conveyor 107 of the transfer mechanism 105 is moved to the first position of the lifting table 100. The conveyor 103 of the transfer mechanism 105 and the second conveyor 108 of the transfer mechanism 105 are driven in the same direction as the second conveyor 104 of the elevating table 100, respectively. Out, or carrying out of the loading pallet to the elevating table 100 and carrying in of the empty pallet can be performed at the same time. At the time of carrying the load, the loading / unloading mechanism 106 performs loading / unloading of a loading pallet or an empty pallet to the first and second transport conveyors 107 and 108 of the delivery mechanism 105.
[0005]
[Problems to be solved by the invention]
However, in the above-described pallet-based load transport device, when the load carrying-in / out mechanism 102 is installed on each floor F1 to F3 of the elevating / lowering transport mechanism 101, a space for both the transfer mechanism 105 and the unloading mechanism 106 is required. Therefore, it is necessary to secure a large space for installing the loading / unloading mechanism 102 on each floor, and there is a problem that a work space on each floor is narrowed in a factory or a warehouse.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a pallet-based load transfer device that does not require a large space as in the related art for installing a load transfer mechanism.
[0007]
[Means for Solving the Problems]
A load transport device using a pallet according to the present invention includes a lift transport mechanism for raising and lowering a lift table between a plurality of floors, and a load transport mechanism installed at an entrance of a predetermined floor of the lift transport mechanism. The elevating table has a load support surface provided with a first transport conveyor for transporting a loading pallet loaded on the pallet between the loading / unloading mechanism and a load on the pallet. An empty pallet support surface provided with a second transport conveyor for transporting an unoccupied empty pallet is provided vertically .
The pallet has left and right side walls at both ends of a horizontal loading surface, and a flange is formed outwardly at the upper end of each side wall . The load carrying-in / out mechanism is provided for loading / unloading the loading pallet to / from the load supporting surface of the elevating table, and a left / right chain conveyor for carrying the load, and for carrying out / out the empty pallet to the empty pallet supporting surface of the lifting table. The left and right chain conveyors for empty pallet transfer, and the left and right chain conveyors for load transfer at the height corresponding to the load support surface of the lifting table and facing the front of the lifting table from both sides. A first conveyor moving mechanism for moving forward and backward, and a left and right chain conveyor for transferring empty pallets from both sides to a position corresponding to an empty pallet support surface of the elevating table and facing the front of the elevating table; A second conveyor moving mechanism for moving forward and backward, and a pair of left and right support claws for engaging and disengaging right and left flanges of the pallet at front and rear positions; The front and rear of the loading pallet or the right and left flanges of empty pallets at positions on both sides of the front of a position opposed to a height lifting table corresponding to the load support surface and empty pallets supporting surface of the lifting table by pawls respectively support A pallet unloading mechanism for unloading and loading unloading pallets to the left and right chain conveyors for transporting loads and loading and unloading empty pallets to the left and right chain conveyors for transporting empty pallets by moving up and down along the lifting guide. It is provided.
[0011]
In the load transport device according to the above aspect, when loading pallets are loaded into the lifting table of the lifting transport mechanism by the loading / unloading mechanism, first, the loading pallets on the floor surface are paired with a pair of support claws on the left and right sides of the pallet loading mechanism. lifted to a position above than the chain conveyor for supporting and load carrying the front and rear position by. Next, the first and second conveyor moving mechanisms are driven to move the left and right chain conveyors for transporting the load and the left and right chain conveyors for transporting the empty pallet from both sides. After moving to the opposite position in front of the elevating table at a height corresponding to the height and positioning, the supporting pawls are slightly lowered to lower the loading pallet onto the left and right chain conveyors for transporting the load. .
[0012]
Next, the left and right chain conveyors for load transport and the first transport conveyor of the elevating table are driven in the same direction (loading direction), and the left and right chain conveyors for empty pallet transport and the second of the elevating table are driven. The transport conveyor is driven in the same direction (load unloading direction), and the loading pallets on the left and right chain conveyors for transporting the load are loaded onto the load supporting surface of the lifting table, and at the same time, empty on the empty pallet supporting surface of the lifting table. The pallets are carried out onto the left and right chain conveyors for transporting empty pallets.
[0013]
Next, the pair of left and right support claws of the pallet unloading mechanism support and lift the front and rear positions of the empty pallets on the left and right chain conveyors for empty pallet transport, and drive the second conveyor moving mechanism to drive the empty pallet transport. If the left and right chain conveyors are moved to the both sides from the position facing the front of the elevating table and retracted, each supporting claw can be lowered and the empty pallet can be lowered onto the floor.
[0014]
When unloading a loading pallet from the lifting table of the lifting / lowering transport mechanism, first, a pair of left and right support claws of the pallet unloading mechanism support the front and rear positions of the empty pallet, and the upper positions of the left and right chain conveyors for transporting the empty pallet. Lift up. Next, the first and second conveyor moving mechanisms are driven to move the left and right chain conveyors for transporting the load from both sides at a height corresponding to the load supporting surface of the lifting table and opposed to the front of the lifting table. And the left and right chain conveyors for transporting empty pallets from both sides to a position corresponding to the empty pallet support surface of the elevating table and to the opposite position in front of the elevating table. After that, the supporting pawls are slightly lowered, and the empty pallets are lowered onto the left and right chain conveyors for transporting the empty pallets.
[0015]
Next, the first transport conveyor of the lifting table and the left and right chain conveyors for transporting the load are driven in the same direction (loading direction), and the left and right chain conveyors for transporting empty pallets and the second chain conveyor of the lifting table. The transport pallet is driven in the same direction (load loading direction) with the transport conveyor, and the loading pallets on the load support surface of the lifting table are unloaded onto the left and right chain conveyors for transporting loads, and at the same time, the left and right chains for empty pallet transport. Empty pallets on the conveyor are carried onto the empty pallet support surface of the lifting table.
[0016]
Next, the pair of right and left support claws of the pallet unloading mechanism support and lift the front and rear positions of the loading pallet on the left and right chain conveyors for transporting the load, and drive the first and second conveyor moving mechanisms. Then, move the left and right chain conveyors for transporting the load and the left and right chain conveyors for transporting the empty pallet from the opposite position in front of the elevating table to both sides and retreat, lowering each support claw and loading The pallet can be lowered on the floor.
[0017]
Although various forms are conceivable for the pallet used in the load transport device according to the present invention, it is preferable to provide side walls at both ends of the horizontal loading surface, and to support the upper end of each side wall by the left and right pallet support mechanisms. A pallet having a flange formed outward is used.
[0019]
【Example】
FIG. 1 and FIG. 2 show the configuration of a pallet-based load transport device according to an embodiment of the present invention.
The illustrated load transport device includes a lift transport mechanism 1 for vertically moving a lift table 10 between a ground floor and a second floor along a tower body 9 to transport loads, and a floor surface of each floor. And a loading / unloading mechanism 2 installed above the entrance / exit G1 and G2 of the lifting / lowering transport mechanism 1.
[0020]
The elevating table 10 is moved up and down by a driving device (not shown), and is controlled to stop at the entrances G1 and G2 of each floor. The lifting table 10 is provided with a load support surface 13 and an empty pallet support surface 14 in two upper and lower stages. The first roller conveyor 11 for transporting the loading pallet P1 to and from the load carrying-in / out mechanism 2 is provided on the load supporting surface 13 and the load carrying-in / out mechanism 2 is provided to the empty pallet supporting surface 14. Second roller conveyors 12 for transporting the empty pallets P2 are provided respectively. The first and second roller conveyors 11 and 12 are independently driven by a driving device (not shown), and can rotate in both forward and reverse directions.
[0021]
The pallet is formed by bending side walls 16, 16 on both sides of a horizontal loading surface 15, and has an outward flange 17 at the upper end of each side wall 16. The left and right flanges 17 are supported by left and right pallet support mechanisms 70R and 70L (details will be described later) in the loading / unloading mechanism 2.
[0022]
The loading / unloading mechanism 2 includes left and right chain conveyors 3, 3 for transporting the loading pallets P1 to and from the load supporting surface 13 of the lifting table 10, and an empty pallet supporting surface of the lifting table 10. 14, the left and right chain conveyors 4 and 4 for transporting empty pallets P2 for transporting empty pallets P2 and the left and right chain conveyors 3 and 3 for transporting loads are respectively advanced and retracted inward from both sides. A first conveyor moving mechanism 5 and a second conveyor moving mechanism 6 for moving the left and right chain conveyors 4 and 4 for transporting empty pallets forward and backward from both sides, respectively, are provided.
[0023]
The left and right chain conveyors 3, 3 for transporting the load are positioned at a height corresponding to the load supporting surface 13 of the stopped lifting table 10, and are provided on the left and right moving frames 50R, 50L of the first conveyor moving mechanism 5. Each is provided. Sprocket wheels 31, 32 are attached to the inside of each of the moving frames 50R, 50L at the front and rear portions, respectively, and an endless chain 33 is stretched between the sprocket wheels 31, 32 to connect the left and right chain conveyors 3 together. Each is composed. The one sprocket wheel 31 is driven by the motor 34 in either the forward or reverse direction, whereby the left and right chain conveyors 3 are driven with respect to the lifting table 10 in both the loading direction and the loading direction.
[0024]
The left and right chain conveyors 4 and 4 for transporting empty pallets are positioned at a height corresponding to the empty pallet support surface 14 of the stopped lifting table 10, and the left and right moving frames 60 R and 60 R of the second conveyor moving mechanism 6. 60L are provided respectively. Sprocket wheels 41 and 42 are attached to the inside of each of the moving frames 60R and 60L at the front and rear portions, respectively, and an endless chain 43 is stretched between the sprocket wheels 41 and 42 to connect the left and right chain conveyors 4. Each is composed. One sprocket wheel 41 is driven in both forward and reverse directions by a motor 44, whereby the left and right chain conveyors 4 are driven with respect to the lifting table 10 in both the loading direction and the loading direction.
[0025]
The first conveyor moving mechanism 5 includes left and right moving frames 50R and 50L provided with left and right chain conveyors 3 and 3 for transporting loads, a rack 51 provided on each moving frame 50R and 50L, and a left and right fixed. It includes a pinion 52 that meshes with the rack 51 provided on the frames 20R and 20L, and a motor 53 that drives each of the pinions 52. By driving each of the motors 53 in either forward or reverse direction, The left and right chain conveyors 3 and 3 for loading and unloading move from both sides with respect to both sides of the front facing position of the lifting table 10 at a height corresponding to the load supporting surface 13 of the lifting table 10. Let it.
[0026]
The second conveyor moving mechanism 6 includes left and right moving frames 60R and 60L provided with left and right chain conveyors 4 and 4 for transporting empty pallets, a rack 61 provided on each moving frame 60R and 60L, and a left and right moving frame 60R and 60L. It includes a pinion 62 that meshes with the rack 61 provided on the fixed frames 20R and 20L, and a motor 63 that drives each of the pinions 62. The motors 63 are driven in synchronization in either the forward or reverse direction. As a result, the left and right chain conveyors 4 and 4 for transporting empty pallets from both sides are positioned at both heights corresponding to the empty pallet support surface 14 of the lifting table 10 and opposite positions in front of the lifting table 10. Each is moved forward and backward.
[0027]
The loading / unloading mechanism 2 performs loading / unloading of the loading pallets P1 with respect to the left and right chain conveyors 3 and 3 for transporting loads and loading / unloading of the empty pallets P2 with respect to the left and right chain conveyors 4 and 4 for transporting empty pallets. A pallet unloading mechanism 7 is provided. The pallet unloading mechanism 7 includes left and right pallet support mechanisms 70R and 70L capable of respectively supporting the left and right flanges 17 of the loading pallet P1 and the empty pallet P2. The lifting operation is performed at both sides of the front facing position of the lifting table at a height corresponding to the load supporting surface 13 and the empty pallet supporting surface 14 of the lifting table 10.
[0028]
Each pallet support mechanism 70R, 70L in this embodiment includes a pair of support claws 71, 72 which are disengaged from the left and right flanges 17 of the loading pallet P1 and the empty pallet P2 at front and rear positions, and left and right fixed frames 20R, 20L. The lifting guides 73, 74 for the supporting claws 71, 72 provided on the front side, and chains 75, 76 for moving the supporting claws 71, 72 up and down along the lifting guides 73, 74, respectively.
[0029]
The upper ends of the four chains 75, 76 are engaged with two sprocket wheels 77, 78 provided at the upper ends of the left and right fixed frames 20R, 20L, respectively. By driving in synchronization in either of the opposite directions, the support claws 71, 72 simultaneously move up and down along the elevating guides 73, 74, and the right and left of the loading pallet P1 and the empty pallet P2 during the elevating. It is disengaged from the flange 17.
[0030]
Next, the operation of the load transport device having the above configuration will be described.
When loading the loading pallet P1 into the lifting table 10 of the lifting transport mechanism 1 by any one of the floors by the loading / unloading mechanism 2, first, the left and right pallet support mechanisms 70R and 70L in the pallet unloading mechanism 7 are driven. As shown in FIGS. 3 and 7, the loading pallet P1 on the floor is supported by the support claws 71 and 72 and lifted to a position above the load conveyors 3 and 3.
[0031]
Next, as shown in FIGS. 4 and 8, the first and second conveyor moving mechanisms 5 and 6 are respectively driven to move the left and right chain conveyors 3 and 3 for transporting the load from both sides of the lifting table 10. It is moved to both sides of the front facing position of the elevating table 10 at a height corresponding to the load supporting surface 13 to be positioned and the left and right chain conveyors 4 and 4 for empty pallet transport are moved from both sides to the elevating table. After moving to a position corresponding to the empty pallet support surface 14 of the ten pallets and on both sides of a position facing the front of the elevating table 10 and positioning the same, the support claws 71, 72 of the left and right pallet support mechanisms 70R, 70L. To lower the loading pallet P1 onto the left and right chain conveyors 3 and 3 for transporting the load, and disengage the support claws 71 and 72 from the loading pallet P1.
[0032]
Next, as shown in FIGS. 9 (1) and 9 (2), the left and right chain conveyors 3 and 3 for transporting the load and the first roller conveyor 11 of the lifting table 10 are driven in the same direction (load carrying direction). Then, the left and right chain conveyors 4 and 4 for transporting empty pallets and the second roller conveyor 12 of the elevating table 10 are driven in the same direction (unloading direction). As a result, the loading pallets P1 supported on the left and right chain conveyors 3 and 3 for transporting the load are carried onto the load supporting surface 13 of the lifting table 10, and at the same time, the empty pallets on the empty pallet supporting surface 14 of the lifting table 10. As shown in FIG. 5, P2 is carried out onto the left and right chain conveyors 4 and 4 for transporting empty pallets and is supported horizontally.
[0033]
Next, as shown in FIGS. 6 and 10, the supporting pawls 71, 72 of the left and right pallet supporting mechanisms 70R, 70L support and lift the empty pallet P2 supported on the chain conveyors 4, 4. Then, the left and right chain conveyors 4 and 4 are moved from both sides of the facing position in front of the elevating table 10 to the both sides to retract, and then the pallet support mechanisms 70R and 70L are lowered. Operate to lower the empty pallet P2 on the floor.
[0034]
Next, when unloading the loading pallet P1 from the elevating table 10 of the elevating / lowering transport mechanism 1 on any of the floors, first, the left and right pallet supporting mechanisms 70R, 70L of the pallet unloading mechanism 7 as shown in FIG. To support the empty pallet P2 by engaging the support claws 71, 72 with the flange 17 of the empty pallet P2 on the floor surface, and lift the empty pallet P2 to a position above the left and right chain conveyors 4, 4 for transporting the empty pallet. .
[0035]
Next, as shown in FIG. 12, the first and second conveyor moving mechanisms 5 and 6 are driven, and the left and right chain conveyors 3 and 3 for transporting the load from both sides are moved to the load support surface 13 of the lifting table 10. Is moved to both sides of the front facing position of the elevating table 10 so as to be positioned, and the left and right chain conveyors 4 and 4 for transporting empty pallets from both sides are moved to the empty pallet of the elevating table 10. After being moved to a position corresponding to the support surface 14 and located on both sides of a position facing the front of the elevating table 10 for localization, the support claws 71 and 72 of each of the pallet support mechanisms 70R and 70L are lowered to be empty. The pallet P2 is lowered and supported on the left and right chain conveyors 4 and 4 for transporting empty pallets.
[0036]
Next, as shown in FIG. 13, the first roller conveyor 11 of the elevating table 10 and the left and right chain conveyors 3 and 3 for transporting the load are driven in the same direction (loading direction), and the empty pallet transport is performed. The left and right chain conveyors 4 and 4 and the second roller conveyor 12 of the elevating table 10 are driven in the same direction (load carrying direction). As a result, the loading pallets P1 on the load supporting surface 13 of the lifting table 10 are carried out and supported on the left and right chain conveyors 3 and 3 for transporting loads, and at the same time, the left and right chain conveyors 4 and 4 for transporting empty pallets. The empty pallet P2 supported on the pallet 4 is carried onto the empty pallet support surface 14 of the lifting table 10.
[0037]
Next, as shown in FIG. 14, the left and right pallet support mechanisms 70R and 70L are driven to support the loading pallets P1 supported on the left and right chain conveyors 3 and 3 for transporting the loads by the support claws 71 and 72. Then, the first and second conveyor moving mechanisms 5 and 6 are driven to move up and down the left and right chain conveyors 3 and 3 for transporting loads and the left and right chain conveyors 4 and 4 for transporting empty pallets. The table 10 is moved to both sides from the front facing position and retracted. Thereafter, the support claws 71, 72 of each of the pallet support mechanisms 70R, 70L are lowered, and the loading pallet P1 is lowered on the floor.
[0038]
【The invention's effect】
According to the present invention, unlike the conventional loading / unloading mechanism, it is not necessary to provide a delivery mechanism and a loading / unloading mechanism side by side, so that a large space as in the related art is required for installing the loading / unloading mechanism. Therefore, there is no possibility that the working space on each floor is narrowed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall configuration of a load transport device according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a first floor portion of the load transport device of FIG. 1;
FIG. 3 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 4 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 5 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 6 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 7 is a plan view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 8 is a plan view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 9 is a plan view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 10 is a plan view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 11 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 12 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 13 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 14 is a front view showing a configuration of a loading / unloading mechanism and a loading / unloading operation.
FIG. 15 is a front view showing the entire configuration of a conventional load transport device.
FIG. 16 is a cross-sectional view illustrating a configuration of a conventional load transport device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Elevating conveyance mechanism 10 Elevating tables 11 and 12 Roller conveyor 13 Load support surface 14 Empty pallet support surface 2 Load carrying in / out mechanism 3 Chain conveyor for load conveyance 4 Chain conveyors 5 and 6 for empty pallet conveyance Conveyor movement mechanism 7 Pallet stack Wholesale mechanism 70R, 70L Pallet support mechanism P1 Loading pallet P2 Empty pallet

Claims (1)

A lifting / lowering transport mechanism for raising / lowering the lifting / lowering table between a plurality of floors, and a loading / unloading mechanism installed at an entrance of a predetermined floor of the lifting / lowering transport mechanism, wherein the lifting / lowering table includes a loading / unloading mechanism. A load support surface with a first transport conveyor for transporting a loaded pallet loaded on the pallet between the second pallet and a second transport pallet for transporting an empty pallet not loaded on the pallet; An empty pallet support surface with a conveyor of
The pallet has left and right side walls at both ends of a horizontal loading surface, and a flange is formed to be bent outward at an upper end of each side wall,
The load loading and unloading mechanism for performing the left and right chain conveyor for unloading conveyor for performing loading and unloading of the loading pallet for load support surface of the lifting table, the loading and unloading of the empty pallet for empty pallets supporting surface of the lifting table The left and right chain conveyors for empty pallet transfer, and the left and right chain conveyors for load transfer at the height corresponding to the load support surface of the lifting table and facing the front of the lifting table from both sides. A first conveyor moving mechanism for moving forward and backward, and a left and right chain conveyor for transferring empty pallets from both sides to a position corresponding to an empty pallet support surface of the elevating table and facing the front of the elevating table; A second conveyor moving mechanism for moving forward and backward, and a pair of left and right support claws engaged with left and right flanges of the pallet at front and rear positions; The front and rear of the loading pallet or the right and left flanges of empty pallets at positions on both sides of the front of a position opposed to a height lifting table corresponding to the load support surface and empty pallets supporting surface of the lifting table by pawls respectively support A pallet unloading mechanism for unloading and loading unloading pallets to the left and right chain conveyors for transporting loads and loading and unloading empty pallets to the left and right chain conveyors for transporting empty pallets by moving up and down along the lifting guide. A pallet-based load transport device.

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