JPH07121767B2 - Batch transfer device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a batch transfer device capable of collectively transferring a large number of loaded pallets.

(Problems to be Solved by the Invention) As a conventional apparatus of this type, there is a transfer apparatus as described in JP-A-60-153337.

This conventional transfer device, as shown in FIGS. 18 and 19,
Conveyor 2 extending in the front-rear direction of horizontally mounted truck 1
And a front lift 3 and a rear lift 4 which are installed at a position facing the track 1 with the conveyor 2 sandwiched between them at the horizontal position of the track.

The rear 4 lift is a pair of telescopic columns 4a that travel on rails 5 laid perpendicular to the conveyor 2,
It is composed of a rear lift bar 4b installed between the columns 4a, and a plurality of parallel forks 4c extending horizontally so as to be orthogonal to the conveyor 2 whose rear end is supported by the lift bar 4b. 3 is composed of a pair of telescopic columns 3a running on rails 6 laid in parallel to the rails 5 of the rear lift 4 and a front lift bar 3b installed between the columns 3a. It was

The procedure for loading with this transfer device is as follows.
First, with the front lift 3 and the rear lift 4 standing by at the retracted positions of the rails 5 and 6, the pallets 7 loaded by the conveyor 2 are sequentially transferred between the horizontally mounted truck 1 and the rear lift bar 4b. , Position along the bed of truck 1.

Then, the rear lift 4 is advanced along the rails 5 to move the forks 4c into the pallets 7, and then the front lift 3 is moved.
Of the column 3a is extended to bring the front lift bar 3b into contact with the lower part of the tip of the fork 4c, and the pallet 7 is lifted to a predetermined height while the both ends of the fork 4c are supported by the front lift bar 3b and the rear lift bar 4b. . In this state, the front lift 3 and the rear lift 4 are moved forward, the guide rollers 4d attached to the tip of the fork 4c are placed on the bed of the truck 1, and then the front lift bar 3b is lowered to move the rear lift 4
Is further advanced to push the pallet 7 into the loading platform. Then, the guide roller 4d is housed in the fork 4c, the rear lift bar 4b is lowered, the pallet 7 is mounted on the loading platform, and then the rear lift 4 is retracted to move the fork 4c to the pallet 7c.
Complete the work by pulling out from.

(Problems to be Solved by the Invention) In the conventional transfer device as described above, when the pallets 7 are sequentially transported to the side of the truck bed by the conveyor 2, the first-arrival pallets are transported to the latter pallets by stoppers or the like. There is a problem that the pallet 7 and the driving roller of the conveyor 2 rub against each other on the conveyor 2 until they arrive, and the pallet 7 and the driving roller are worn out significantly.

Further, in this conventional transfer device, when the pallet 7 is set in a predetermined transfer load form in accordance with the loading platform of the truck 1, the pallets 7 are sequentially transported and aligned on the conveyor 2,
It was difficult to change the transfer package, for example, by vacating the transfer package by setting empty seats.

Furthermore, since this conventional transfer apparatus sets the transfer load form on the conveyor 2, for example, when trying to transfer one truck at a time, the conveyor 2 needs to have a width at least larger than the width of the truck bed. Therefore, the width of the transfer device, including the total length of the fork 4c, should be at least 2 of the truck bed.
Since it has a width more than double, the installation area becomes very large, and it takes a long time to transfer each row in order to reduce the installation area. Was there.

The present invention has been tried in order to solve the above-mentioned drawbacks of the conventional transfer device, the damage of the pallet and the conveyor is small, and it is easy to set a desired transfer load form. Moreover, it is an object to provide a batch transfer device having a small installation area.

(Means for Solving Problems) In order to achieve the above-mentioned object, the present invention provides a rear lift that can move forward and backward in a direction perpendicular to a transfer target position, and a front lift that can move forward and backward in the same direction as the rear lift. The rear lift comprises a front lift and a traverser that travels in a direction perpendicular to the moving direction of the rear lift and the front lift and is movable from the side to the rear lift and the front position of the front lift. A rear lift bar erected in a direction orthogonal to the traveling direction, an elevating member that elevates and lowers the lift bar, and a plurality of horizontally arranged side-by-side in the forward direction of the rear lift with its rear end supported by the rear lift bar. A front lift bar having a fork and a drive member for moving the rear lift forward and backward, the front lift bar being installed in a direction orthogonal to the traveling direction of the front lift bar, and the rear lift bar being moved up and down. A conveyor having an elevating member that moves toward and away from the lower end of the fork of the lift and a drive member that moves the front lift forward and backward, the traverser is arranged in the same direction as the fork of the rear lift, and the pallet is mounted, And a drive member for moving the traverser, and a transfer member for moving the pallet mounted on the conveyor to the rear lift side from the traverser at the front position of the rear lift and the front lift to move the fork of the rear lift into the pallet. It is characterized by having.

As an embodiment of the present invention, firstly, a batch transfer device is arranged in the same direction as a conveyor of a traverser, and a pallet is mounted on the conveyor, and the pallet mounted on the conveyor is pushed out to be mounted on the conveyor of the traverser. It is characterized in that it comprises a pallet stock having a pusher to be loaded in the second, and secondly, a batch transfer device has an underjack which is buried in the front position of the rear lift and the front lift, The underjack is characterized by having a vehicle underbody that supports the chassis of the truck from below. Thirdly, the lifting member of each of the rear lift and the front lift is a screw jack. There is something.

(Operation) In the batch transfer device according to the present invention, an arbitrary number of pallets are arranged and mounted on the conveyor of the traverser, and the traverser is driven by the driving member to move the pallets to the front of the rear lift and the front lift. Transport to. Then, the transfer member transfers the pallet to the rear lift side, the fork enters into the pallet, and the pallet is transferred from the traverser to the rear lift.

After transferring the pallets to the rear lift in this way, and repeating the transport of the pallets by the traverser several times as necessary to arrange the pallets along the fork to form an arbitrary packing pattern, and then lifting the front lift. The front lift bar is lifted by the operation of the members to abut against the tip of the fork, and the fork is held by the front lift bar and the rear lift bar in a double-supported state. Furthermore, the lifting members lift the rear lift bar and the front lift bar, respectively. Lift up.

In this state, the rear lift and the front lift are moved forward by the respective drive members, and the pallet is transferred to the front of the transfer target position by the fork. Next, after lowering the front lift bar, the rear lift is further advanced to position the pallet above the transfer target position. Then, the rear lift bar and fork are lowered to mount the pallet at the transfer target position, and then the rear lift is retracted to pull out the fork from the pallet to complete the transfer work.

Further, in the embodiment including the pallet stock of the present invention, the pallets are arranged and stocked in advance on the pallet stock in an arbitrary packing form, and the pallets are automatically transferred from the front row to the conveyor of the traverser by the pusher. Instead, it is transferred to the rear lift in sequence,
This improves work efficiency.

Further, in the embodiment including the vehicle under, when the pallets are collectively transferred to the truck bed, the undercarriage supports the truck chassis from below to support the truck bed, and the pallet is mounted on the truck bed. The loading platform is prevented from inclining when being carried out.

Further, in the embodiment in which the lifting members for the rear lift and the front lift are screw jacks, it is possible to arbitrarily control the fine adjustment lifting of each lift bar as compared with the case of using the hydraulic cylinder system.

(Embodiment) The present invention will be described in more detail based on an embodiment shown in the drawings.

This batch transfer device has a front lift A and a rear lift B.
, A traverser C, a pallet stock D, and a vehicle under E.

The front lift A and the rear lift B are arranged on the side of the truck 1 that is laterally attached to the cargo loading platform facing the bed, and the rear lift B is laid so as to extend in a direction perpendicular to the front-rear direction of the truck 1. Guide rail for rear lift 10
The front lift A is free to travel on the upper lift guide rail 11 extending parallel to the rear lift guide rail 10 at a position lower than the rear lift guide rail 10 as shown in FIG. It is free to run.

The pallet stock D is arranged at a position lateral to the standby position (FIG. 1) of the front lift A and the rear lift B,
The traverser C stands by in front of the pallet stock D.

The traverser C is a traverser guide rail 12 extending in a direction perpendicular to the guide rails 10 and 11 from the front position of the pallet stock D between the front lift A and the rear lift B in the standby position and the laterally mounted truck 1. It is free to drive on.

Further, the vehicle under E is buried in the floor at the front position of the freight loading platform, and is arranged so as to be located directly below the loading platform of the truck 1 when the truck 1 is laterally attached to the platform.

In the rear lift B, a retractable strut 21 is erected on a carriage 20 having traveling wheels, and a plunger 21a of a strut of each carriage (in this embodiment, three carriages are arranged in parallel) is installed upright.
A rear lift bar 22 is erected between the upper ends of the above through a beam. And at the bottom of this rear lift bar 22,
The screwer 23a of the screw jack 23a installed upright on the 20 is connected, and the propeller 21 expands and contracts via the counter shaft by driving the screw jack 23a of the motor 26 so that the rear lift bar 22 moves up and down. .

A large number of forks 24 are fixed to the rear lift bar 22 so that their rear ends are parallel to and horizontal to the guide rails 10, and the rear ends B of the forks 24 are retracted on the guide rails 10. When in the standby position, the traverser C traveling on the guide rail 12 is close to the side portion.

At the tip of each fork 24, a guide roller 25 is attached to the lower part of the fork 24 by a swingable arm 25a as shown in FIG. 3 so that the guide roller 25 can project the arm 25a. Is pulled up by a spring 25b biasing in the direction of arrow X, the rod 25c inserted into the fork 24 is slid in the tip direction by a drive device (not shown), and the wedge portion of the rod tip is armed.
By biasing 25a in the direction opposite to the arrow X direction, the guide roller 25 is projected below the fork 24.

Each carriage 20 has a deceleration motor M1 so that it can travel on the guide rail 10 by itself.

In the front lift A, an extendable and retractable support column 31 is erected on a trolley 30 having traveling wheels, and a plunger 31a of a support column of each trolley in parallel (in this embodiment, three trolleys are aligned in parallel).
A front lift bar 32 is erected between the upper ends of the above through a beam. At the bottom of the front lift bar 32,
A plunger 33 of a screw jack 33a which is erected on 30 is connected to the motor jack 34a.
Is driven, the support column 31 expands and contracts via the counter shaft, and the front lift bar 32 moves up and down.

Each carriage 30 has a deceleration motor M2 so that it can travel on the guide rail 11 by itself.

Between the fork 24 of the rear lift B and the front lift A,
As shown in Figure 4, a frame fixed to the floor of the platform
40 and roller conveyor in the same direction as the fork 24 longitudinal direction
41 rows are arranged in multiple rows and further this roller conveyor
A retraction device 42 is arranged between 41. This retractor
As shown in FIGS. 5 and 6, the frame 42 has a pair of racks 43 attached to the frame 40 so as to be movable in the horizontal direction. An arm 45 having is attached swingably. A rod 46 having a wedge-shaped tip is attached between the pair of racks 43 so as to be able to advance and retreat in the axial direction. When the rod rolls on the upper surface of the rod and is lifted, the hook portion 45a projects upward from the roller conveyor 41.

In the traverser C, a plurality of roller conveyors 51 are arranged on the upper surface of a carriage 50 traveling on the guide rails 12 by traveling wheels in a direction perpendicular to the guide rails 12, and a plurality of traverser pushers 52 are inserted between the roller conveyors 51. It is arranged.

As shown in FIGS. 7 and 8, the traverser pusher 52 has a rack 53 attached horizontally to the frame of the carriage 50 and in a direction perpendicular to the guide rails 12, and the rack 53 is longitudinally moved by rollers 54 attached to the frame. You can freely move back and forth. Pallet stock D for this rack 53
A stopper 55 is provided upright at the end opposite to the roller conveyor 51, and the tip of the stopper 55 is projected above the roller conveyor 51. At the end of the rack 53 opposite to the stopper 55, hook it at the tip.
An arm 56 having 56a is swingably attached, and a roller 56 attached to the arm 56 by a wedge-shaped rod 58 attached to a plunger of a cylinder 57.
When b is lifted, the hook portion 56a is projected above the roller conveyor 51. The rack 53 is moved forward and backward in the horizontal longitudinal direction by a motor 59 mounted on the carriage 50.

The traverser C is designed to be self-propelled on the guide rail 12 by a motor 60 mounted on the carriage 50.

In the pallet stock D, roller conveyors 62 are arranged in a plurality of rows at right angles to the guide rails 12 on the upper surface of a base frame 61 fixed on the floor of the cargo loading platform, and storage is provided between the roller conveyors 62. A plurality of pushers 63 are arranged. As shown in FIG. 9, this storage pusher 63 has a plurality of hooks 65 arranged on a rack 64 mounted on a base frame horizontally and at right angles to the guide rails 12 so as to be movable back and forth. The rack 64 is adapted to be moved forward and backward in the longitudinal direction by a drive device (not shown). The hook portion 65 moves the pallet forward on the roller conveyor 62 in the direction of the traverser C, and when retracted, the hook portion 65 tilts forward so that the pallet does not run backward when placed in the retracted position. There is.

The vehicle under E consists of a pair of hydraulically driven chassis underjacks 70, a screw jack 71 for moving the underjacks 70 in the front-rear direction of the truck 1, and a sub-underjack 72 for heavy loads. Has been done.

Next, the procedure of the batch transfer operation of the pallets to the truck by the batch transfer device will be described with reference to FIGS. 10 to 17.

Before the transfer work is started, a predetermined number of pallets loaded on the pallet stock D are arbitrarily arranged and stocked.

The pallets thus stocked are pushed by the hook portions 65 of the storage pusher 63 to be conveyed on the roller conveyor 62, and are moved one by one from the front row onto the roller conveyor 51 of the traverser C waiting in front of the pallet stock D. Each pallet mounted on the traverser C is positioned by being locked by the stopper 55 of the traverser pusher 52.

Next, the traverser C on which the pallet is mounted is self-propelled on the guide rail 12 by the motor 60 and moved to the front of the front lift A and the rear lift B (FIG. 10). Then, after stopping the traverser C at a predetermined position, the rack 53 of the traverser pusher 52 is moved forward by the motor 59 as shown by the alternate long and short dash line in FIG. 7, and the pallet 7 is pushed by the stopper 55 and moved onto the roller conveyor 41. At this time, it is possible to completely transfer the pallet 7 onto the roller conveyor 41 by one reciprocating movement of the rack 53, but in that case, the reciprocating stroke of the rack 53 becomes long, so that the first reciprocating movement of the rack 53 is performed. Due to the movement, approximately half of the pallet 7 is roller conveyor 41.
It is designed to move up.

During this first reciprocating movement, the rod 58 is retracted and the arm
The hook portion 56a of 56 is located below the roller conveyor 51. And after the first reciprocating motion is completed, the cylinder
The rod 58 is moved forward by 57, the guide roller 56b is lifted, the arm 56 is raised, and the hook portion 56a is projected upward from the roller conveyor 51. Then, the rack 53 is advanced again, and the rear end of the pallet 7 is pushed by the hook portion 56a to be completely moved onto the roller conveyor 41. At this time, the fork 24 of the rear lift B has entered the pallet 7.

Next, the rod 46 of the retracting device 42 is moved forward to raise the arm 45 to project the hook 45a onto the roller conveyor 41 as shown in FIG. 5, and then the rack 43 is retracted with respect to the frame 40. , The pallet 7 is searched by the hook portion 45a, and the pallet 7 is pulled further into the roller conveyor 41.
The retracting device 42 positions the pallet 7 at an arbitrary position of the fork 24 to form an arbitrary packing shape, and adjusts the position so that the special portion thereof enters the pallet 7 when the front lift bar 32 is lifted. When the batch transfer device is used as an unloading device, this retractor functions as a pusher for transferring the pallet from the fork 24 to the traverser C.

Here, in this embodiment, as can be seen from the space distribution in FIG. 1, the pallets 7 for one time of the traverser C are arranged in two rows in the axial direction and the front-back direction so that the pallet for one truck is set. Since the pallet 7 is transferred by the traverser C a total of four times as described above, the pallet 7 for one truck is set on the roller conveyor 41 as shown in FIG. You can

At this time, vacant seats are previously provided on the pallet stock D at arbitrary positions, the transfer position from the traverser C to the roller conveyor 41 is arbitrarily set, and the retraction device is also used.
By setting the retract position by 52,
It is possible to freely set the desired packaging.

When the preparations for loading into the truck are completed as described above, the truck 1 is horizontally mounted on the cargo loading platform as shown in FIG.
The under jack 70 of the vehicle under E is extended and brought into contact with the lower portion of the chassis of the truck 1 to stabilize the truck 1. At this time, the underjack 70 can be moved in the front-rear direction by the screw jack 71 to be positioned according to the chassis of the truck 1. The underjack 70
Is designed to automatically stop in the set state when the limit switch built into the tip hits the truck chassis. Further, when the truck 1 is large, for example, 8 tons or more, the sub under jack 72 is further used to stabilize the truck 1.

When the truck 1 is stabilized by the vehicle under E, the front lift bar 32 of the front lift A is then attached to the screw jack 33.
It is lifted by a and brought into contact with the lower end of the tip of the fork 24. And then the screw jack 33a of the front lift A
Then, the screw jacks 23a of the rear lift B are simultaneously operated to raise the fork 24 while maintaining the horizontal state with both ends supported, and the pallet 7 is raised to a predetermined height (Fig. 12).

Then, as shown in FIG. 3, the rod 25c is moved forward by a driving device (not shown) to move the guide roller 25 into the fork 24.
After the pallet 7 is lifted, the front lift A and the rear lift B are moved forward on the guide rails 10 and 11 while maintaining constant intervals at a constant speed. This simultaneous running method is carried out by equipping the front lift A and the rear lift B with inverters and adjusting their frequencies to the same value. And front lift A
Reaches the front end of the guide rail 11 and the front end of the fork 24 falls on the loading platform of the truck 1, the front lift A and the rear lift B are stopped. (Fig. 13).

After that, the screw jacks 23a and 33a are simultaneously operated in the opposite direction to the above, and the fork 24 is operated until the three-lens photoelectric sensor 80 attached to the tip of the fork detects the truck bed.
After detecting the truck bed, the screw jack 23 of the rear lift B is stopped and the screw jack 33 of the front lift A is lowered and separated from the fork 24. Then, the fork 24 slightly inclines toward the truck side, the guide roller 25 reaches the truck carrier, and the fork 24 is held by the rear lift bar 22 and the truck carrier (Fig. 14).

Next, the rear lift B is advanced to the forward end of the guide rail 10, and the pallet 7 is pushed onto the truck bed. When the pallet 7 reaches the center distribution position of the truck 1, the rear lift B is stopped, the screw jack 23 is operated, the three-lens photoelectric sensor 90 at the base of the fork detects the truck carrier, and the fork 24 becomes horizontal. Down (Fig. 15).

Then, the rod 25c is retracted, the guide roller 25 is pulled up, the fork 24 is cantilevered, and then the screw jack is used.
Operate 23 and slightly lower pallet 7 until it reaches the bed (Fig. 16). After the pallet 7 is completely loaded on the loading platform,
The rear lift B is retracted, the forks 24 are pulled out from the pallet 7, and the transfer operation is completed.

Then, by lowering the underjack 70 of the vehicle under E and removing it from the truck chassis, the truck 1 can be started.

It is also possible to unload the cargo from the truck by performing the reverse operation procedure.

Further, in the above embodiment, only the transfer operation to the truck bed has been described, but the batch transfer apparatus according to the present invention is not limited to the transfer to the truck, and for example, the transfer from the first floor to the second floor of the building. It can be widely used for mounting work and transferring work to product shelves.

In the above embodiment, the case where the fork 24 is supported by both the front lift A and the rear lift B to carry out the transfer work is explained. However, when the transfer load is light, the rear lift is carried out. It is also possible to carry out the transfer work by cantilever supporting the fork 24 only by B.

(Effects of the Invention) As described above, according to the present invention, the pallet is conveyed by the traverser in arbitrary numbers before the rear lift, the pallets are transferred from the traverser to the rear lift, and the pallet is once placed on the fork of the rear lift. Since the pallet is set and then transferred to the transfer target position all at once by lifting the pallet with a fork, when setting the pallet in a predetermined packing form as in the conventional case, the conventional transfer device is used. The problem that the first-arrival pallet and the driving roller of the conveyor rub against each other until the latter pallet is set and the pallet and the driving roller are consumed is solved.

In addition, since the pallet is once moved from the traverser to the rear lift to form the load form on the fork, it is easy to change the load load form by providing empty seats at any location.

Even when transferring multiple rows of pallets all at once, the traverser can transport them one by one and form multiple rows of packages on the fork, so it can be installed compared to conventional transfer equipment. The area is small, and it is possible to transfer all packages at once.

[Brief description of drawings]

1 is a plan view showing an embodiment of the present invention, FIG. 2 is a side view of the same embodiment, FIG. 3 is a sectional view showing the structure of the fork tip in the same embodiment, and FIG. 4 is the same embodiment. FIG. 5 is a side view showing the arrangement of the fork and the retractor, FIG. 5 is a side view showing the structure of the retractor, FIG. 6 is a front view of the retractor, and FIG. 7 is the structure of the traverser in the embodiment. FIG. 8 is a side view showing the pusher of the traverser, FIG. 8 is a front view showing the pusher of the pallet stock in the same embodiment, and FIGS. 10 to 17 show a transfer work procedure in the same embodiment. FIGS. 18 and 19 are explanatory views showing a conventional transfer device. A: Front lift B: Rear lift C: Traverser D: Pallet stock E: Vehicle under 10,11,12 ... Guide rail 21 ... Strut 22 ... Rear lift bar 23a ... Screw jack 24 ... … Fork 25 …… Guide roller 26 …… Motor 31 …… Post 32 …… Front lift bar 33a …… Screw jack 41 …… Roller conveyor 42 …… Retractor 51 …… Roller conveyor 52 …… Travers pusher 62 …… Roller Conveyor 63 …… Storage pusher 70 …… Under jack 71 …… Screw jack 72 …… Sub under jack

Claims (4)

[Claims] 1. A rear lift that can move forward and backward in a direction perpendicular to a transfer target position, a front lift that can move forward and backward in the same direction as the rear lift, and a moving direction of the rear lift and the front lift. A traverser that travels at a right angle to the rear lift and is movable from the side to the front position of the front lift, the rear lift being installed in a direction orthogonal to the running direction; And a lift member for moving the lift bar up and down, a plurality of forks horizontally supported in parallel with the rear end of the rear lift bar in the forward direction of the rear lift, and a drive member for moving the rear lift forward and backward. A front lift bar provided in a direction orthogonal to the traveling direction of the front lift, and an elevating member for moving the front lift bar up and down to contact and separate from a lower end of a fork of the rear lift, And a drive member for moving the partial lift forward and backward, the traverser having a conveyor in which the pallet is mounted and arranged in the same direction as the forks of the rear lift, and a drive member for moving the traverser. A batch transfer device comprising a transfer member for moving a pallet mounted on a conveyor from a traverser to a rear lift side at a front position of a front lift and forking a fork of the rear lift into the pallet. 2. A pallet stock having a conveyor arranged in the same direction as the traverser conveyor and having pallets mounted thereon, and a pusher for pushing out the pallets mounted on the conveyor and loading the pallets onto the traverser conveyor. The batch transfer device according to claim (1). 3. The invention according to claim 1, further comprising an underjack embedded at a front position of the rear lift and the front lift, the underjack including a vehicle under supporting the chassis of the truck from below. ) Sectional transfer device. 4. A lift jack of each of the rear lift and the front lift is a screw jack.
The batch transfer device described in the item.