JPH032485Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fall prevention device that prevents a transport vehicle from falling from a lifting device.

[Prior art] Warehousing equipment such as the stacker crane system or the multi-carousel system has traditionally been used to handle small rectangular parallelepiped-shaped items such as plastic buckets and carton cases, but in the case of the former, the storage capacity is usually about 50 kg or less. A crane with a dead weight of several tons is required to handle the load, the drive device becomes larger and the power consumption increases, the building must be strengthened to accommodate the heavy crane, and the processing capacity increases. There are problems such as there is a limit to the reduction in the cycle time of loading and unloading, and in the case of the latter, it is necessary to use multiple levels of rotating shelves to load and unload the desired cargo. There were problems such as the need to rotate one stage in its entirety toward the transfer device, which required a large amount of power, and the need for a drive device and a control device for each stage.

Therefore, in order to solve the above-mentioned problems of conventional warehouse equipment, a transport vehicle that can carry loads and travel is raised and lowered by a lifting device placed at one end of the aisle between shelves, and the upper and lower shelves are raised and lowered. Warehouse facilities are being considered in which warehouses can be transferred to and from the warehouse for loading and unloading.

[Problems to be solved by the invention] However, in the case of warehouse equipment in which the transport vehicle is transferred to the upper or lower tier using an elevating device, what happens when the transport vehicle is mounted on the elevating device and goes up and down? This is dangerous as there is a risk of the machine running out of control and falling from the lifting device.

The present invention has been developed in view of the above-mentioned circumstances with the aim of preventing the transport vehicle from falling while the transport vehicle is being raised and lowered by the lifting device.

[Means for Solving the Problems] The present invention attaches a track body that can reciprocate in a direction parallel to the traveling direction of the transport vehicle and that can be connected to and detached from a fixed track body to a lifting platform that can be raised and lowered. At the same time, a yoke whose tip extends toward the fixed track body and a lever whose tip extends upward are attached to the track body on the same axis and can integrally rotate in the reciprocating direction of the track body; The tip of the yoke is connected to a stopper that is movable up and down on the track body, and the tip of a lever that is pivotally attached to the lifting platform and extends toward the fixed track body is connected to the lever.

[Function] Therefore, in the present invention, when the track body moves toward the fixed track body, the lever attached to the yoke is pulled by the lever connected to the elevator platform, and the lever attached on the same axis as the yoke rotates downward, causing the yoke to move. Since it rotates upward, the stopper rises and is released, allowing the carriage to travel.

Also, when the track body moves away from the fixed track body, it is pushed by the lever connected to the lifting platform, and the lever attached on the same axis as the yoke rotates upward, causing the yoke to rotate downward. , the stopper descends and engages with the track body, becoming in a state where it is possible to prevent runaway of the transport vehicle.

[Example] Hereinafter, an example of the present invention will be described based on the accompanying drawings.

First, the outline of the warehouse equipment will be explained with reference to FIGS. 7 to 9. On both sides of a passageway 1, shelves 4 equipped with shelf boards 3 for loading small rectangular parallelepiped loads 2 are arranged. A plurality of shelf boards 3 are arranged in the longitudinal direction of the shelf 4, and are also arranged in a plurality of stages in the vertical direction at approximately equal pitches.

There is a transport cart 5 on the side of the left and right shelves 4 facing the aisle 1.
A rail 6 on which the train runs is fixed to each stage. The transport vehicle 5 includes a drive wheel 8 that can be rotated via a drive shaft 7 by a drive device (not shown), and a driven wheel 9 that is not driven.
A driven wheel 9 is rotatably fitted to the rail 6. In addition, the conveyance truck 5 is, for example, manufactured by Utility Model No. 56-107706.
It is equipped with a transfer device 10 consisting of a traverse section and a conveyor section as shown in the above publication, and a belt conveyor 11 of the transfer device 10 is configured to be able to traverse toward the shelf 4 side and to rotate the conveyor belt. By doing so, the belt conveyor 11 allows the goods 2 to be loaded and unloaded.

A lifting device 12 is provided at one end of the shelf 4 that is connected to the passage 1.
A mast 13 is erected and fixed on the floor, and a chain 15 is drivably spanned over a sprocket fixed to the output shaft of a drive device 14 disposed on the side of the mast 13. Must have 1
A lifting platform 16 that can be moved up and down along 3 is suspended, and by driving a chain 15 by a drive device 14, the lifting platform 16 can be moved up and down.

The lifting platform 16 suspended from the chain 15 is the second
As shown in the figure, the front face is shaped like a letter, and square shafts 17 are fixed to the upper ends of both sides of the platform 16 and project horizontally toward the center of the platform 16. As shown in FIG. 1, a lever 19 is attached via an elastic material 18 such as rubber, and the lifting platform 1
Guide wheels 20 and 21 are attached to 6 so as to be able to roll along the mast 13.

The lever 19 extends in the traveling direction of the transport vehicle 5, and links 24 and 25 extending downward are pivotally connected to the front and rear ends of the lever 19 via pins 22 and 23.
A frame 28 is pivotally connected to the lower end of 25 via pins 26 and 27, and a lever 19 and links 24 and 2
5. The frame 28 forms a parallelogram link, and the frame 28 is integrally provided with a rail 29 that can be connected to the rail 6.
A striker 31 that operates a fall prevention device 47 that prevents the rail positioning member 30 and the transport vehicle 5 from falling from the rail 6 is fixed to the tip side of the slider 31, and a striker 31 that activates a fall prevention device 47 that prevents the rail positioning member 30 and the transport vehicle 5 from falling from the rail 6 is fixed. The tip of the rod is connected to the lower surface of the frame 28 via a bracket 32, and a fall prevention device 33 is provided on the upper surface of the frame 28 to prevent the transport vehicle 5 from falling when transferred to the rail 29'.

Details of the fall prevention device 33 are shown in FIGS. 3 and 4, and a rod-shaped stopper 34 that can be raised and lowered is fitted into a cylindrical body 37 attached to a predetermined position on the upper surface of the frame 28. The rail 29 is inserted through the hole provided on the top surface of the frame 28.
It is designed so that it can be lowered to the side, and the stopper 3
A pin 35 provided on the side of the cylindrical body 37 projects to the outside through a long hole 36 provided on the side of the cylindrical body 37.

A bracket 38 is fixed to the upper surface of the frame 28 in close proximity to the cylindrical body 37.
A yoke 40 is fixed to one end of the shaft 39 which is rotatably supported by the shaft 39, and a pin 35 protruding from the stopper 34 is fitted into a long hole 41 provided at the tip of the yoke 40. A lever 42 is fixed to the lever 42 , and a lever 44 is pivotally attached to a pin 43 fixed to a predetermined position on the side of the lifting platform 16 .
is connected to.

Details of the fall prevention device 47 are shown in FIGS. 5 and 6, and a cylindrical body 48 attached to a predetermined position on the upper surface of the rail 6 has a rod-shaped stopper 4 that can be raised and lowered.
9 are fitted, and the stopper 49 can pass through a hole provided on the upper surface of the rail 6 and descend into the rail 6. A pin 50 provided on the side of the stopper 49 is inserted into the cylindrical body 48. It protrudes to the outside through a long hole 51 provided on the side.

A bracket 52 is fixed to the upper surface of the rail 6 in close proximity to the cylindrical body 48, and a yoke 5 is attached to one end of a shaft 53 rotatably supported by the bracket 52.
4 is fixed, and a long hole 5 provided at the tip of the yoke 54
5 has a pin 50 protruding from the stopper 49.
is inserted into the shaft 53, and the striker 3 is inserted into the other end of the shaft 53.
A lever 56, which is pushed by the lever 1 and rotates the shaft 53, is fixed.

In addition, in FIG. 8, 57 is a warehousing device, and 58 is a warehousing device.

Next, the operation of the present invention will be explained.

The fall prevention device 47 on the rail 6 side is the lifting device 12
If the rail 29 of the shelf 4 and the rail 6 of the shelf 4 are not in a connected state, the stopper 49 will close to the cylindrical body 48 due to its own weight.
The lower end is inserted into the rail 6. Therefore, even if the transport vehicle 5 runs out of control for some reason, either the driving wheel 8 or the driven wheel 9 (the driving wheel in the case of FIG. 8) hits the stopper 49 and is stopped. Therefore, the transport vehicle 5
will not come off the rail 6 and fall.

For example, when the carrier 5 transfers from the rail 6 of the shelf 4 to the rail 29 of the lifting platform 16, the carrier 5 waits at the home position (HP) at the end of the rail 6 on the lifting device 12 side and is prevented from falling. Device 4
The stopper 49 of No. 7 is lowered as described above to prevent the transport vehicle 5 from running out of control.

When the drive device 14 is started, the chain 15 is driven, and the lifting platform 16 is raised and lowered integrally with the frame 28, rails 29, etc., and the rails 29 are set at a predetermined level where the transport cart 5 to be transferred is waiting. It is stopped at the rail 6 part.

When the rail 29 of the lifting platform 16 is at approximately the same level as the predetermined rail 6, the hydraulic cylinder 46 is actuated by a predetermined stroke in the direction in which the rod is contracted.
Then, since the frame 28 is pivotally supported by the lever 19 via the links 24 and 25, it moves integrally with the rail 29 toward the rail 6 by parallelogram motion. However, the lever 4 of the fall prevention device 33
4 is pivotally supported on the lifting platform 16 via a pin 43 and cannot be moved to the rail 6 side, but the bracket 3
8 is fixed to the frame 28, so that it can be moved integrally with the frame 28 and rail 29 toward the rail 6 side. Therefore, by moving the bracket 28 toward the rail 6, the lever 42, shaft 39, and yoke 40 are rotated clockwise in FIGS.
It rises while being guided by the frame 28, and comes off the frame 28 to be in the released state.

On the other hand, when the frame 28 is moved integrally with the rail 29 toward the rail 6 by the fluid pressure cylinder 46 as described above, the rail positioning member 30 is fitted to the rail 6, and the rails 6 and 29 are positioned and connected. In addition, since the striker 31 pushes the lever 56 of the fall prevention device 47 clockwise in FIGS. 1 and 5, the yoke 54 is pushed through the shaft 53.
similarly rotates clockwise, and therefore the stopper 4
9 is guided by the cylindrical body 48, rises, comes off the rail 6, and enters the released state.

As described above, the stoppers 34 and 49 of the fall prevention devices 33 and 47 are raised, and the drive device of the released transport vehicle 5 rotates the drive wheel 8, causing the transport vehicle 5 to travel and move toward the rail 6 on the shelf 4 side. from there to a predetermined position on the rail 29 on the lifting platform 16 side of the lifting device 12.

After confirming that the carriage 5 has moved to a predetermined position on the rail 29 of the lifting platform 16, the hydraulic cylinder 4
6 in the direction in which the rod extends. Therefore, the traveling direction 28 moves toward the side opposite to the rail 6, and the bracket 38 of the fall prevention device 33 also moves toward the side opposite to the rail 6 together with the frame 28. However, lever 4
4 is pivotally supported by the lifting platform 16 via a pin 43 and cannot be moved to the side opposite to the rail 6. Therefore, the rail 42, shaft 39, and yoke 40 are moved to the side opposite to the rail 6 by moving the frame 28 and bracket 38 1 and 3, and the stopper 34 is guided by the cylindrical body 37 and lowered.
It passes through a hole in the upper surface of the rail 28 and is located at a predetermined position above the rail 29 so as to prevent the transport vehicle 5 on the rail 29 of the lifting platform 16 from running out of control. Also frame 28
As a result of the movement in the counterclockwise direction, the rail positioning member 30 comes off from the rail 6, and the striker 31 also leaves the lever 56 of the fall prevention device 47. Therefore, the stopper 49 is inserted into the rail 6 so as to be lowered by its own weight and prevent the transport vehicle 5 on the rail 6 side from running out of control.

As described above, when the transport vehicle 5 transfers onto the rail 29 of the lifting platform 16 and the fall prevention device 33 reaches a state where the transport vehicle 5 on the rail 29 can be prevented from running out of control, the drive device 14 of the elevator device 12 is driven. Then, the lifting platform 6 is raised to an appropriate level on the shelf 4, and the rail 29 of the lifting platform 6 is brought to approximately match the level of a predetermined rail 6 from which the transport vehicle 5 is to be taken out, and then stopped. When the rail 29 stops in front of the predetermined rail 6, the fluid pressure cylinder 4 is moved in the same manner as described above.
6 connects the frame 28 and rail 29 to the rail 6
The rail 29 is fitted and connected to the rail 6 by moving it to the side. As a result, the stoppers 34 and 49 of the fall prevention devices 33 and 37 are lifted and released as described above, so that the carrier 5 can transfer from the rail 29 of the lifting platform 16 to the rail 6 of the shelf 4. . Therefore, the transport vehicle 5 is driven by a drive device, travels on the rails 29, and transfers to the rails 6. Thereafter, the frame 28,
If you return the rail 29 to its original position on the side opposite to the rail 6,
The rail 29 comes off the rail 6 and the fall prevention device 3
The stoppers 34 and 49 at 3 and 47 are lowered.

As mentioned above, when the stoppers 34 and 49 of the fall prevention devices 33 and 47 are lowered, the transport vehicle 5
When the stoppers 34 and 49 are raised, the carriage 5 can be moved from the rail 6 of the shelf 4 to the rail 29 of the lifting platform 16, and from the rail 29 of the lifting platform 16 to the rail 6 of the shelf 4, respectively. It becomes possible to transfer. In other words, when the lifting platform 16 reaches the destination stage, the lifting platform 16 is moved by the fluid pressure cylinder 46.
Unless the frame 28 and rail 29 are moved toward the rail 6 side, the carriage 5 cannot transfer between the rails 6 and 29.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention.

[Effects of the invention] According to the fall prevention device of the present invention, it is possible to prevent the transport vehicle from running out of control while the transport vehicle is mounted on the lifting platform and being raised and lowered, and therefore the transport vehicle can be prevented from falling from the elevator platform. Since there is no need to worry about this, it is possible to achieve an excellent effect of high safety.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an embodiment of the fall prevention device of the present invention, Fig. 2 is a view taken in the - direction arrow of Fig. 1, and Fig.
The figure is an explanatory diagram of the fall prevention device on the lifting device side, FIG. 4 is a plan view of FIG. 3, FIG. 5 is an explanatory diagram of the fall prevention device on the shelf side, and FIG. 6 is a plan view of FIG. 5. FIG. 7 is an explanatory diagram of an example of warehouse equipment to which the fall prevention device of the present invention is applied, FIG. 8 is a plan view of FIG. 7, and FIG. 9 is a side view of FIG. 7. In the figure, 5 is a transport vehicle, 6 is a rail, 12 is a lifting device, 16 is a lifting platform, 24 and 25 are links, and 28
29 is a frame, 29 is a rail, 33 is a fall prevention device, 34 is a stopper, 37 is a cylindrical body, 40 is a yoke, 42 and 44 are levers, and 46 is a fluid pressure cylinder.

Claims (1)

[Scope of utility model registration request] A track body capable of reciprocating in a direction parallel to the traveling direction of the transport vehicle and capable of being connected to and detached from a fixed track body is attached to a lifting platform that can be raised and lowered, and is attached to the track body on the same axis. A yoke whose distal end extends toward the fixed orbital body and a lever whose distal end extends upward are attached so as to be able to integrally rotate in the reciprocating direction of the orbital body, and the stopper is arranged to be movable up and down on the orbital body. A fall prevention device characterized in that a tip of a yoke is connected to the tip of the lever, and a tip of a lever that is pivotally connected to the lifting platform and extends toward the fixed track body is connected to the lever.