JPS643763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluidized shelf system capable of transporting articles by intermittently supplying compressed air,
In particular, it relates to improvements in the control device.

As is well known, for example, in a pallet truck system in which goods (cargoes) loaded on pallets are stored in pallet units and then taken out again, the goods (cargos) that have been stored are moved by gravity to the exit. A so-called fluidized shelf system has come into use. As shown in Fig. 1, this fluidized shelf system consists of rails 1 that are generally stacked in multiple stages (5 stages in the case shown) with an inclination.
1, and when cargoes 13 are received in pallets 14 from the storage entrance 12 side of this rail 11, the cargoes 13 are automatically conveyed along the slope of the rail 11 to the storage exit side so that they can be taken out. This has various advantages, such as being able to utilize space effectively and effectively implementing a first-in, first-out system. In addition, warehousing work is generally performed in pallets, but warehousing work can be performed in pallet units, or by manual picking, in which a worker manually unloads the desired number of goods loaded on a pallet. There are cases where it is done.

When moving the load 13 along the rail 11, in a system that uses compressed air to prevent the load 13 from accelerating too much, it is generally necessary to transfer the load 13 intermittently while applying braking. Therefore, conveyance means as shown in FIGS. 2 and 3 have been considered. First, the one shown in FIG. 2 has a plurality of rollers 1 in a groove 16 formed in a rail 11.
A roller unit 19 which is rotatably supported by a substantially U-shaped support 18 and an air hose 20 are installed, and when compressed air is fed into the air hose 20, the air hose 20 expands and the roller unit 1
9 is pushed up, the rollers 17 come into contact with the pallet 14, and the pallet 14 is separated from the upper surface of the rail 11 and transported by gravity along the slope of the rail 11. On the other hand, when the supply of compressed air into the air hose 20 is stopped and the compressed air is discharged, the roller unit 19 is lowered into the groove 16 and the pallet 14 is
is placed on the rail 11 and braking is applied.

Further, in the case shown in FIGS. 3a and 3b, as shown in FIG. 3a, a leg portion 21 is formed on the pallet 14, and this leg portion 21 is placed on the rail 11. The rail 11 is hollow as shown in FIG. 3b, and through holes 22 and 23 are formed in the upper center of the rail 11, respectively. When compressed air is sent into the center, it is blown out from the through holes 22 and 23,
A thin film of air forms between the legs 21 and the rail 11 to reduce friction and allow the pallet 14 to be transported by gravity along the slope of the rail 11. On the other hand, when discharging or feeding the compressed air is stopped, the legs 21 are placed closely on the rails 11 and braking is applied.

Therefore, if the conveying means shown in FIG. 2 and FIG. This is advantageous in terms of structure and efficiency, and when compressed air is discharged or the supply is stopped, the pallet 1
4 is placed on the rail 11 and is in a stopped state, which is also good in terms of safety.

However, the fluidized shelf system using the conventional conveying means as described above is still in the development stage, and although it has various advantages as mentioned above, it is difficult to fully utilize its advantages. However, there is a strong desire to develop a control means for fluidized shelf systems that can fully meet the needs of users not only in terms of functionality but also in particular safety. Picking in the unloading operation is several times more frequent than unloading pallets or empty pallets, and there is no need to perform unnecessary pulsing during the picking operation, so compressed air for pulsing is supplied. There's no need to. Therefore, it is desirable to stop the transport operation for unloading during the picking operation, and to start the transport operation externally from the exit side after the work is completed, thereby making it economically superior. .

This invention was made in consideration of the above-mentioned circumstances, and it is possible to stop the transport operation during unloading work,
It is an object of the present invention to provide a control device for a fluidized shelf system that can start a conveyance operation from the delivery side by an external operation and is thus economically superior.

That is, the control device for the fluidized shelf system according to the present invention includes a container capable of loading a plurality of articles, a rail on which the container is placed and is installed at an angle, and a control device for controlling the flow shelf system in a state in which compressed air is supplied to the rail. The container is moved intermittently by alternately repeating a first state in which the container is transported by gravity along the rail and a second state in which the transport of the container is stopped with compressed air being discharged or not being supplied from the rail. The present invention is characterized in that it includes a conveying operation control means for starting the operation of the conveying means by an external operation from the exit side.

Hereinafter, before describing embodiments of the present invention, a fluidized shelf system to which the present invention is applied will be described with reference to FIGS. 4 to 7.

Figure 4 is an external view of the above-mentioned liquid shelf system.
In Fig. 4, one vertical block bay (having four levels) is called a bay, and each level of each bay (in other words, the transport direction of the load 13) is called a lane.The system shown in the figure has eight bays. 24a to 24h
and each bay 24a to 24h has 4 bays.
The total number of lanes 25a to 24d is 32 lanes.
Then, for each of these bays 24a to 24h, pallet 1 is removed from one end of the lanes 25a to 25d.
The cargo 13 loaded on lanes 25a to 25d is loaded into the warehouse, and the cargo 13 is taken out from the other end of the lanes 25a to 25d. Also,
The transport operation of the load 13 can be controlled independently for each bay 24a to 24h.

Here, as shown in FIG. 5, one bay 24a is taken out from among the bays 24a to 24h, and its transport operation will be explained. In addition, the conveyance operation of the other bays 24b to 24h is carried out by the above-mentioned bay 24a.
Since it is the same as that, its explanation will be omitted.

That is, each lane 25a to 25d of this bay 24a is provided with a rail 11 with an inclination as described above.
1 is supported by a plurality of columns 26. This rail 11 is equipped with a roller unit 19 and an air hose 20 as shown in FIG. It is designed so that it can be transported intermittently. In this case, an air pipe (not shown) for sending compressed air to the air hose 20
The air hose 20 is also piped along the pillar 26, and the air hose 20 is opened and closed by controlling a solenoid valve (not shown) provided at the base of the air pipe.
The compressed air is supplied and stopped.

Each pillar 26 adjacent to the front of the bay 24a on the storage entrance 12 side and the storage exit 15 side, respectively.
Optical sensors 27 and 28 are installed on unillustrated crosspieces installed in the bay direction (the back side of the drawing is not shown). These sensors 27 and 28 normally output L (low) level signals, and for example, when a forklift approaches, they output an H (high) level signal. It is used to determine whether The output signals of the sensors 27 and 28 are respectively supplied to both input ends of an OR circuit 29, as shown in FIG. The output terminal of this OR circuit 29 is connected to the timer circuit 3.
0, a set-reset type flip-flop circuit (hereinafter referred to as S-RFF circuit) 3
1, and is also connected to one input terminal of an AND circuit 33 via a NOT circuit 32. Also, this S-RFF circuit 3
The output terminal Q of 1 is connected to the other input terminal of the AND circuit 33. The output terminal of the AND circuit 33 is connected to a terminal 35 to which an H level signal is applied via a switch 34, and
S--
It is connected to the reset input terminal R of the RFF circuit 31.

Here, the output terminal of the AND circuit 36 is connected to a first input terminal of an AND circuit 40 and one input terminal of an AND circuit 41 after passing through a timer circuit 39 . Further, the output terminal of the AND circuit 37 is connected to the second input terminal of the AND circuit 40 via the timer circuit 42 and the other input terminal of the AND circuit 41 via the NOT circuit 43. It is connected to the.

The output terminal of the AND circuit 40 is first connected to a relay circuit 45 via an amplifier circuit 44. This relay circuit 45 turns on a switch 46 when an H level amplified signal is supplied, and applies the output voltage of the AC power supply 74 to the electromagnetic coil 48 of the electromagnetic valve. Then,
The electromagnetic coil 48 operates to open the electromagnetic valve, and compressed air is sent into the air hose 20 via the air pipe, so that the load 13 is conveyed. In addition, the AND circuit 4
The output terminal of 0 is connected to the timer circuit 49 and the note circuit 5.
0 to the other input terminal of the AND circuits 36 and 37, and is connected to the output terminal of the AND circuit 41 via the timer circuit 51. The connection point between the output terminal of the timer circuit 51 and the output terminal of the AND circuit 41 is S-
It is connected to the set input terminal S of the RFF circuit 52. The output terminal Q of this S-RFF circuit 52 is connected to the third input terminal of the AND circuit 40 via a knot circuit 53 and also to a display section 55 via an amplifier circuit 54. In addition, the above S-
The reset input terminal R of the RFF circuit 52 is connected to the terminal 5 to which an H level signal is applied via the switch 56.
7 is connected.

Here, each of the above timer circuits 30, 38, 39,
42, 49, and 51 are input signals from L level to H level.
The timer operation starts when the level rises, and after the predetermined time determined for each timer has passed, the
It operates to generate a high level output signal, and if the input signal goes to L level before the above predetermined time has elapsed, it is reset at that point, and when the input signal rises to H level again, it will start again. The timer operation is started from this point. In other words, each timer circuit 30, 38, 3
9, 42, 49, and 51 can be said to detect that the H level state continues for a predetermined time after the input signal rises from the L level to the H level, and output an H level signal. Further, the timer circuits 30, 38, 39, 42, 49, 51 are as follows:
When the input signal is inverted to L level while outputting an H level signal, the output is immediately set to L level in real time without performing a timer operation.

In this case, the timer circuits 30, 3
The predetermined times of 8, 39, 42, 49, and 51 are 4 seconds for timer circuit 30, 30 seconds for timer circuit 38, 4 seconds for timer circuit 39, and 3.9 seconds for timer circuit 42.
The timer circuit 49 is set to 0.7 seconds and the timer circuit 51 is set to 0.8 seconds, and as will be explained below, these times are adjustable.

The operation of the above configuration will be described below with reference to the time chart shown in FIG.
In this case, a to n in FIG. 7 are different from a to n in FIG.
Each point represents a signal.

First, if a forklift approaches the exit 15 at an arbitrary time T1 and performs the exit operation, the output of the sensor 28 becomes H level, and the output of the OR circuit 29 also goes to H level as shown in FIG. 7a. becomes. If the unloading operation continues for 4 seconds or more, at time T2, 4 seconds after time T1,
As shown in FIG. 7b, the output of the timer circuit 30 becomes H level, the S-RFF circuit 31 is set, and its output becomes H level as shown in FIG. 7c. At this time, since an L level signal obtained by inverting the H level output of the timer circuit 30 by the NOT circuit 32 is supplied to the AND circuit 33, the output of the AND circuit 33 becomes an L level as shown in FIG. 7d. ing.

In this state, if the unloading operation ends at time T3 and the forklift moves away from the unloading port 15, the output of the sensor 28 becomes L level, and the output of the OR circuit 29 is also shown in FIG. 7a. It becomes L level. Then, the output of the timer circuit 30 becomes L level in real time as shown in FIG. 7b, but the output of the S-RFF circuit 31 becomes the L level as shown in FIG. 7c.
It is held at H level as shown in FIG. Since the H level signal obtained by inverting the L level output of the timer circuit 30 by the NOT circuit 32 is input to the AND circuit 33, the output of the AND circuit 33 becomes H level as shown in FIG. 7d. At this time, the timer circuit 38 starts its timer operation, and its output is kept at the L level as shown in FIG. 7e.

Then, at time T3 when the output of the AND circuit 33 becomes H level, the output of the NOT circuit 50 is at the H level, as will be clear from the explanation given later, so the outputs of the AND circuits 36 and 37 are at the H level. As shown in FIG. 7 f and j, both become H level. Then, at time T4, which is 3.9 seconds after time T3, the timer circuit 4 is activated as shown in FIG.
The output of timer circuit 2 becomes H level, and then at time T5, 4 seconds after time T3, the output of timer circuit 39 becomes H level as shown in FIG. 7g. here,
Considering the case where the S-RFF circuit 52 is not set, its output terminal Q is at the L level as shown in FIG.
The H level signal inverted at is supplied to the third input terminal of the AND circuit 40.

Therefore, in synchronization with the output of the timer circuit 39 going high, the output of the AND circuit 40 goes high as shown in FIG. 7h. Then,
This H level output signal is amplified by the amplifier circuit 44 and then supplied to the relay circuit 45, and as described above, the electromagnetic coil 48 is energized, the electromagnetic valve is opened, and compressed air is sent to the air hose 20. The load 13 is then transported.

Here, if the period during which compressed air is supplied to the air hose 20 and the load 13 is being transported is referred to as on-time, this on-time is defined by the timer circuit 49. That is, the timer circuit 49 starts its timer operation at time T5 when the output of the AND circuit 40 becomes H level, and at time T6 after 0.7 seconds, its output becomes H level as shown in FIG. 7i. Then, the output of the NOT circuit 50 goes to the L level, and the outputs of the AND circuits 36 and 37 go to the L level as shown in FIG. 7f and j.
The outputs of the timer circuits 39 and 42 also go to L level in real time as shown in FIG. 7g and k. Therefore, the output of the AND circuit 40 becomes L level as shown in FIG. 7h, the supply of compressed air to the air hose 19 is stopped, and the conveyance of the load 13 is stopped. In other words, the on-time is designed to continue for 0.7 seconds as defined by the timer circuit 49.

Furthermore, when the output of the AND circuit 40 becomes L level, the output of the timer circuit 49 becomes L level in real time, and this L level is inverted to H level by the NOT circuit 50, so that the AND circuits 36, 37 is set to H level again as shown in FIG. 7f and j. Here, at time T6, the output of the timer circuit 49 becomes H level, and the AND circuit 36,
The operation in which the output of 37 once goes to L level and then goes back to H level is performed in real time of the circuit element in an extremely short time, and in FIG. 7, it is shown to be performed approximately at time T6. .

Then, the outputs of the AND circuits 36 and 37 go high again.
In the state where the level has been reached, there is no correction, and the state is the same as that shown at time T3. Therefore, at time T7, 4 seconds after time T6, the output of the AND circuit 40 becomes H level (on time), and at time T8, 0.7 seconds after time T7, the output of the AND circuit 40 becomes L level. is repeated. That is, if the period during which the transport of the load 13 is stopped with respect to the above-mentioned on-time is called off-time, then the off-time of 4 seconds specified by the timer circuit 39 and the 0.7 seconds specified by the timer circuit 49 are defined as off-time. The load 13 is transported by alternately repeating the on-time and the on-time of the load 13.

Here, when the off-time and on-time are stably repeated as described above, as is clear from FIG. 7, the output of the timer circuit 39 is at the H level and the output of the timer circuit 42 is at the L level. Since there is no such period, the output of the AND circuit 41 is at the L level as shown in FIG. 7l. Further, for example, at time T5, the output of the AND circuit 40 is H.
When the level is reached, the timer circuit 51 as well as the timer circuit 49 starts timer operation, but the timer time (0.8 seconds) of this timer circuit 51 is 0.7 seconds.
At time T6 when seconds have elapsed, the output of the AND circuit 40 is inverted to the L level due to the action of the timer circuit 49, so the output of the timer circuit 51 is also maintained at the L level as shown in FIG. 7n. For this reason,
In a state where off-time and on-time are stably repeated, the S-RFF circuit 52 is not set, and its output becomes L as shown in FIG. 7m.
It is maintained at a level.

Then, at time T9, 30 seconds have passed since the output of the AND circuit 33 became H level at time T3.
Then, the output of the timer circuit 38 becomes H level as shown in FIG. 7e. Then, the S-RFF circuit 31
is reset, its output terminal Q goes to the L level as shown in FIG. 7c, and the output of the AND circuit 33 also goes to the L level as shown in FIG. 7d. The pulsing operation, that is, the conveyance operation corresponding to the work is completed.

During the series of conveyance operations from time T3 to time T9, the output of the AND circuit 40 becomes H level (that is, on time) at time Tn in FIG.
Assume that the on-time continues for 0.7 seconds or more. Then, at time Tn+1, 0.8 seconds have passed since time Tn,
The output of the timer circuit 51 becomes H as shown in FIG.
level, the S-RFF circuit 52 is set,
The output becomes H level as shown in FIG. 7m. When this happens, the output of the NOT circuit 53 is inverted to L level, and the output of the AND circuit 40 becomes L level as shown in FIG. 52
The H level output of is sent to the display unit 5 via the amplifier circuit 54.
5 and indicates that an abnormality has occurred.

On the other hand, during the series of conveyance operations from time T3 to T9, at time Tm in FIG.
6 becomes H level as shown in FIG.
At time Tm+1, when 3.9 seconds have not elapsed, timer circuit 39
Suppose that the output of the signal becomes H level as shown in FIG. 7g. In other words, assume that the off time was less than 3.9 seconds. Then, at this time, the timer circuit 42
Since the output of the AND circuit 40 remains at the L level as shown in FIG. 7k, the output of the AND circuit 40 is suppressed to the L level as shown in FIG. goes high as shown in FIG. 7l, so the S-RFF circuit 52 is set and its output goes high as shown in FIG. 7m. Therefore, as described above, the output of the NOT circuit 53 is inverted to the L level, the output of the AND circuit 40 is thereafter held at the L level, and the display unit 55 displays that an abnormality has occurred. It is something.

For example, when the switch 56 is turned on after the repair of the abnormal part is completed, the S-RFF circuit 5
2 is reset, the output of the NOT circuit 53 becomes H level, and the display section 55 stops displaying, returning the state to a state in which transport operation is possible.

Here, in the above explanation, when a forklift or the like approaches the exit 15 and the exit operation is completed and the forklift moves away from the exit 15, that is, when the output of the sensor 28 is reversed from H level to L level, As mentioned above, the conveyance operation is automatically performed, but this occurs in the case of warehousing work, that is, when the forklift approaches the warehousing port 12 and the warehousing operation is completed, the forklift moves to the warehousing port 12.
It can be easily seen from the above description that the conveyance operation is similarly automatically started when the sensor 27 moves away from the object (when the output of the sensor 27 is reversed from the H level to the L level).

Furthermore, if the forklift approaches the entrance 12 or exit 15 during the above-mentioned conveyance operation, that is, during pulsing of compressed air, the sensor 2
When the output of the timer circuit 7 or 28 is inverted from the L level to the H level and this state continues for 4 seconds or more, the output of the timer circuit 30 becomes the H level, and the not circuit 3
The output of 2 becomes L level. Therefore, the output of the AND circuit 33 becomes L level, and the above-mentioned transport operation is automatically stopped.

Here, the timer circuit 30 determines whether, for example, a forklift or the like has simply passed near the entrance 12 or the exit 15, or whether a warehousing or unloading operation has been performed on the entrance 12 or the exit 15. It performs the function of determining whether or not it is happening based on time. That is,
If the forklift remains at the storage entrance 12 or the storage exit 15 for 4 seconds or more, it is assumed that the work is in progress, and the S-RFF circuit 31 is set to a set state so that the transport operation is performed after the work is completed. If the time is full at the end of the second, the S-RFF circuit 31 is not set because it is assumed that the signal has simply passed through.

Further, when the user turns on the switch 34, the output of the AND circuit 33 becomes high.
It is possible to achieve the same state as when the level is reached, and also to manually start the conveyance operation, that is, pulsing. in this case,
The start of pulsing can be manually set using the switch 34, but the on-time is automatically set using each timer circuit 39,49.

Here, as described above, each timer circuit 30,
38, 39, 42, 49, and 51 have adjustable setting times. Therefore, the on-time and off-time can be adjusted as appropriate depending on the weight, amount, etc. of the load 13.

The control device for the fluidized shelf system shown in FIG. 6 is installed in each of the bays 24a to 24h, and can perform pulsing control independently for each bay 24a to 24h. Further, depending on the scale of the bays 24a to 24h, for example, about two bays may be controlled in pulsing by the same control device.

In other words, in the control device for the fluid shelf system as described above, during the warehousing or warehousing operation, the sensor 2
Since the pulsing is stopped when the outputs of 7 and 28 are at the H level, there is no line pusher caused by pushing the following load 13 to the load 13 to be discharged, especially at the exit 15 side, and the load 13 and pallet 14 are This can prevent damage and improve the safety of loading and unloading operations.

Hereinafter, an embodiment in which the present invention is applied to a control device for the fluidized shelf system will be described with reference to FIGS. 8 to 10. However, in FIGS. 8 to 10, the same parts as in FIG. 6 and mutually the same parts are denoted by the same reference numerals, and only the different parts will be described here.

Here, the warehousing work is generally performed in units of 14 pallets, but the unloading work is performed in units of 14 pallets as described above, and in other cases, a worker manually handles a desired number of multiple loads 13 loaded on the pallets 14. In some cases, the work is carried out in so-called bitking, where the work is taken out of the warehouse. When the unloading operation is performed in units of 14 pallets, pulsing may be automatically performed after the unloading operation is completed as described above to transport the subsequent pallets 14 to the unloading port 15. In such a case, there is no need to perform pulsing even if the unloading operation of the cargo 13 is completed as long as the cargo 13 remains on the pallet 14, and if all the cargo 13 is taken out from the pallet 14 and the pallet 14 is removed. It is only necessary to carry out pulsing only when the pallet is in a state where the pallet 14 is in a state where the following pallet 14 is conveyed to the outlet 15.

FIGS. 8 to 10 show control devices in which both the case where the unloading work is performed in units of 14 pallets and the case where the unloading work is performed by picking are taken into consideration.

First, FIG. 8 will be explained. That is, the sensor 28 and the AND circuit 29 are removed from FIG. 6, the output of the sensor 27 on the storage entrance 12 side is directly supplied to the timer circuit 30, and a pulsing switch 59 is provided on the storage exit 15 side. This pulsing switch 59 is connected between a terminal 62 to which an H level signal is applied and a set input terminal S of the S-RFF circuit 31. The pulsing switch 59 is not locked in the operating position.
This is a so-called non-lock type.

According to such a configuration, first, the warehousing operation (in units of pallets) can be explained in the same manner as in FIG. 6. Next, when the unloading operation is performed by picking, if there is an input operation during the unloading operation, the conveyance operation is automatically performed, but the pallet 14 being picked is placed at the unillustrated tray installed at the unloading port 15. It is held by a stopper and picking work is performed.

When unloading work is carried out in units of 14 pallets, the worker operates the pulsing switch 59 and immediately releases it after the work is completed and transport operation is possible. The RFF circuit 31 is set, and the output of the NOT circuit 32 goes high.
Therefore, the output of the AND circuit 33 becomes H level, and the transport operation is started.

Next, FIG. 9 will be explained. That is, this control device is the control device shown in FIG.
By abolishing the sensor 28 installed at the storage entrance 1
A sensor 27 is provided only on the second side, and the output of this sensor 27 is directly supplied to the timer circuit 30. Further, the AND circuit 33 has three inputs, and the output terminal Q of the S-RFF circuit 31 and the output terminal of the NOT circuit 32 are connected to the first and second input terminals, respectively.

Here, the picking switch 5 is placed on the exit exit 15 side.
8 and a pulsing switch 59 shown in FIG. This picking switch 58 is of a so-called push-pull type, which is locked in the operating position once operated, and returns to the non-operated position when operated again.One end of the picking switch 58 is connected to a terminal 60 to which an H level signal is applied. The other end is connected to the third input end of the AND circuit 33 via a knot circuit 61.

Lamps 63 and 64 are provided at the entrance 12 and exit 15, respectively. Of these, the lamp 64 on the exit 15 side is built into the picking switch 58. These lamps 63 and 64 are operated by a picking switch 58.
When the switch 65 interlocked with the switch 65 is turned on, the voltage supplied to the power terminals 66 and 67 is applied to turn on the lamp.

In the above configuration, first, the warehousing work (in pallet units) is carried out using sensor 2 as described above.
7 remains at H level for more than 4 seconds and then goes to L level, that is, when the forklift moves away after the warehousing operation is completed, the output of AND circuit 33 becomes H level.
level, and the conveyance operation is automatically performed. Next, when carrying out the unloading operation by picking, the unloading worker first operates the picking switch 58 to lock it. Then, the lamps 63 and 64 light up, allowing the worker on the warehousing side to recognize that picking work is in progress, and the output of the NOT circuit 61 is inverted to the L level, so the output of the AND circuit 33 is also maintained at the L level. be done. Therefore, even if the warehousing operation is performed, no conveyance operation is performed, and safe picking operation can be performed. After the picking operation is completed, the worker operates the picking switch 58 again to release the locked state, so that the lamps 63 and 64 are turned off, and the output of the knot circuit 61 becomes H level, causing the transport operation to begin. is possible. In this case, if the stocking operation is performed while the picking switch 58 is being operated, the picking switch 58
After the lock of 8 is released, the conveyance operation will be performed automatically.

In addition, when unloading work is performed in units of 14 pallets, the unloading worker first turns the picking switch 5.
8 to prevent the conveyance operation from being performed even if the unloading operation is performed. Then, after the unloading work is completed, the worker operates the picking switch 58 to release the locked state and make the transport operation possible, and then operates the picking switch 59 to immediately start the work. Let go. Then, S-
After the RFF circuit 31 is set, the knot circuit 3
Since the output of 2 becomes H level, AND circuit 33
The output becomes H level, and the conveyance operation is performed.

Furthermore, FIG. 10 will be explained. That is, in place of the picking switch 58 shown in FIG.
A lamp 70 is supplied to the knot circuit 61 and is provided at the storage entrance 12 via an amplifier circuit 69.
It was designed to be supplied to Here, the timer circuit 68, like the timer circuit 30, generates an output at the H level when the output of the sensor 28 rises to the H level and this state continues for 4 seconds or more. This functions to determine whether work is in progress.

In such a configuration, first, regarding the warehousing operation (per pallet), as explained in FIG. It will be done. Next, when workers, forklifts, etc. approach the exit 15 to carry out picking or unloading work in units of pallets, the output of the sensor 28 becomes H level, and if this state continues for 4 seconds or more, Since the output of the knot circuit 61 is inverted to the L level, no conveyance operation is performed even if the warehousing operation is performed, and safe warehousing operation can be performed. Further, at this time, the lamp 70 is lit by the H level output from the timer circuit 68, allowing the worker on the warehousing side to recognize that the work on the warehousing side is in progress. When the unloading work is picking, the worker moves away from the unloading port 15 after finishing the work, the lamp 70 goes out, and the output of the knot circuit 61 becomes H level, and the transport operation is stopped. This is a possible state. In this case, if warehousing work is performed during unloading work, when the worker leaves the unloading port 15 after completing the unloading work, the conveyance operation is automatically started.

Further, when the unloading work is performed in units of 14 pallets, the worker operates the pulsing switch 59 and immediately releases the hand after completing the work and leaves the unloading port 15. Then, after the S-RFF circuit 31 is set, the output of the NOT circuit 32 becomes H level, and then the output of the NOT circuit 61 becomes H level, so the output of the AND circuit 33 becomes H level, and the conveyance operation is performed. It is something that can be done.

Therefore, by configuring the control device of the fluid shelf system as in the above embodiment, it is possible to carry out picking and unloading operations.
It goes without saying that the present invention is not limited to the above-mentioned embodiments, and can be carried out in the same manner, for example, by using not only pallets but also any container capable of loading pickable articles.

As detailed above, according to the present invention, there is no need to perform unnecessary pulsing during the picking operation, which is carried out several times more often than empty pallets or on a pallet basis. Since there is no need to supply compressed air and the conveyance operation for unloading is stopped during the picking operation, it is possible to provide an economically superior control device for a fluidized shelf system.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the fluidized shelf system, FIGS. 2 and 3 are block diagrams showing the conveying means used in the fluidized shelf system, and FIG. 4 is an external view of the fluidized shelf system to which the present invention is applied. Figure 5 is a side view showing one bay taken out from the fluidized shelf system, Figure 6 is a block circuit diagram showing the control device used in the fluidized shelf system, and Figure 7 is the control device. FIG. 8 is a block circuit configuration diagram showing an embodiment of the control device for the fluidized shelf system according to the present invention.
FIGS. 9 and 10 are block circuit configuration diagrams showing other embodiments of the present invention, respectively. 11...Rail, 12...Warehouse entrance, 13...Cargo, 14
...Pallet, 15...Exit, 24a-24h...Bay, 25a-25d...Lane, 26...Column, 27,
28...Sensor, 29...OR circuit, 30, 38, 3
9, 42, 49, 51... timer circuit, 31, 52
...S-RFF circuit, 32, 43, 50, 53, 6
1...Knot circuit, 33, 36, 37, 40, 41
...AND circuit, 34,58,59,65...switch, 35,57,60,62,66,67...terminal, 44,54,69...amplifier circuit, 45...relay circuit, 46...switch, 47...AC power supply ,48...
Electromagnetic coil, 55...Display section, 63, 64, 70...
lamp.

Claims (1)

[Claims] 1 A container capable of loading a plurality of articles, a rail on which the container is placed and installed at an angle, and a first container for transporting the container by gravity along the rail while compressed air is supplied to the rail. and a conveyance means for intermittently conveying the containers by alternately repeating the above state and a second state in which the conveyance of the containers is stopped when compressed air is discharged from the rail or is not supplied. , transport operation control means 31, 32, 33, 3 for starting the operation of the transport means by external operation from the delivery side;
6, 39, 40, 49, 50, 59. A control device for a fluidized shelf system.