JPS643762B2 - - 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. Generally, one block in the vertical direction is called a bay, and each stage of each bay (that is, the transport direction of the load 13) is called a lane.

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. In other words, when compressed air is sent into the central part, it is blown out from the through holes 22 and 23, and a thin film of air is formed between the leg part 21 and the rail 11, reducing friction, and the pallet 14
is transported along the slope of the rail 11 by gravity. 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.

Here, the compressed air supply route will be briefly explained using FIG. 4.

Figure 4 is an external view of the compressed air supply route when looking at the fluidized shelf system from above, and the bottom side of the figure is the storage entrance 12.
It's on the side. In other words, in this fluid shelf system,
Compressor A is installed on the floor on the right side (or left side) on the storage entrance 12 side (because the lowest rail position is higher than the floor surface from the storage exit side), and the air compressed by compressor A is installed on the floor. It is stored in air tank B. The piping from this air tank B goes from the top of the tank B toward the storage entrance 12 side, passes through the air filter C, drain separator D, and pressure reducing valve E, goes down to near the floor, and then runs under the lowest rail 11 toward the bay. Manager F proceeds. This main pipe F is provided with a drain valve (not shown) near the bay at the left end of the storage entrance 12. The main pipe F separates into branch pipes (air pipes to be described later) H at the right end (left end is also acceptable) of each bay, and each branch pipe H passes through a gate valve I and a solenoid valve J, and is connected to the rack pillar 26. Go up along it. Furthermore, it advances to the center of the lane at the lower position of the rail 11 of each lane, and there it branches to the left and right,
It is designed to be connected to an air hose 20 in the rail 11.

In this way, the compressed air supplied from the air tank B is branched from the main pipe F, and is supplied to and discharged from each bay to the lanes of each stage by the action of the solenoid valve J provided for each bay. There is.

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 conventional conveying means as described above is still in the development stage, and although it has various advantages as mentioned above, it has not yet been fully realized. Especially when moving multiple blocks at the same time, compressed air must be sent to each block, so the main compressed air pipe before branching to each block is A large amount of compressed air flows through the main pipe, and the pressure loss due to the resistance of the main pipe and the equipment installed in the main pipe is large.

This invention was made in consideration of the above-mentioned circumstances, and is capable of simultaneously transporting multiple blocks of cargo using an economically sized main pipe and equipment in the main pipe, and is also functionally efficient. It is an object of the present invention to provide a control device for a fluidized shelf system that is extremely economical.

That is, the control device for a fluidized shelf system according to the present invention includes a rail on which articles are placed and is installed at an inclination, and the pallet is transferred by gravity along the rail while compressed air is supplied to the rail. A block comprising a conveying means for intermittently conveying the article by alternately repeating a first state and a second state in which the conveyance of the article is stopped with compressed air being discharged from the rail or not being supplied. a detection means for detecting a block that is ready for transport among the plurality of blocks; a priority storage means for setting and storing the priority order of the blocks in the order detected by the means; and a conveyance operation control means for simultaneously executing the conveyance means of each block by controlling the compressed air supply and the compressed air discharge or non-supply state time in a prioritized order. It is.

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. 5 to 8.

FIG. 5 is an external view of the above fluidized shelf system. The system shown in the figure is composed of eight bays 24a to 24h, and each bay 24a to 24h has four lanes 25a to 24d, that is, the entire system has 32
It is made up of lanes. and,
For each of these bays 24a to 24h, the cargo 13 loaded on the pallet 14 is received from one end of the lanes 25a to 25d, and the cargo 13 is unloaded from the other end of the lane 25a to 25d. is being done. Moreover, the conveyance operation of the load 13 can be controlled independently for each bay 24a to 24h.

Here, as shown in FIG. 6, 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, as described above, the air pipe H for feeding compressed air into the air hose 20 is also arranged along the pillar 26, and the solenoid valve J provided at the base of the air pipe H is controlled to open and close freely. By doing this, compressed air is supplied and stopped to the air hose 20.

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 47 to the electromagnetic coil 48 of the electromagnetic valve J. Then, the electromagnetic coil 48 operates to open the electromagnetic valve J, and compressed air is sent into the air hose 20 via the air pipe H, so that the load 13 is conveyed. Further, the output terminal of the AND circuit 40 is connected to the AND circuits 36 and 37 via a timer circuit 49 and a NOT circuit 50.
are respectively connected to the other input terminals of the
It is connected to the output terminal of the AND circuit 41 via a timer circuit 51. And the timer circuit 51
The connection point between the output terminal of the AND circuit 41 and the output terminal of the AND circuit 41 is connected to the set input terminal S of the S-RFF circuit 52. The output Q of this S-RFF circuit 52 is
It is connected to the third input terminal of the AND circuit 40 via a note circuit 53 and to a display section 55 via an amplifier circuit 54. Further, the reset input terminal R of the S-RFF circuit 52 is connected via a switch 56 to a terminal 57 to which an H level signal is applied.

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, 39, 4
2, 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. Furthermore, when the input signal inverts to L level while outputting an H level signal, the timer circuits 30, 38, 39, 42, 49, and 51 immediately change the output to L level in real time without performing a timer operation. It is set at the level.

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. 8 are replaced by a to n in FIG.
Each point represents a signal.

First, for example, 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. 8a. becomes. If the unloading operation continues for 4 seconds or more, at time T2, 4 seconds after time T1,
As shown in FIG. 8b, 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. 8c. 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. 8d. ing.

In this state, if the unloading operation is now completed 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. 8a. It becomes L level. Then, the output of the timer circuit 30 becomes L level in real time as shown in FIG. 8b, but the output of the S-RFF circuit 31 is held at H level as shown in FIG. 8c. 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. 8d. At this time, the timer circuit 38 starts timer operation, and its output is shown in FIG.
It is maintained at L level as shown in .

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. 8 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. 8g. 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. 8h. 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 J is opened, and compressed air is supplied to the air hose 20. The load 13 is fed into the container and 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. 8i. Then, the output of the NOT circuit 50 goes to L level, and the outputs of AND circuits 36 and 37 go to L level as shown in FIG. 8 f and j.
The outputs of the timer circuits 39 and 42 also go to L level in real time as shown in FIG. 8g and k. Therefore, the output of the AND circuit 40 becomes L level as shown in FIG. 8h, the supply of compressed air to the air hose 20 is stopped, and the conveyance of the load 13 is stopped. In other words, the on-time is set 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. 8 f, 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. 8, 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 conveyed by repeating alternating on-time and on-time.

Here, when the off-time and on-time are stably repeated as described above, as is clear from FIG. 8, 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. 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. 8n. 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. 8m.
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. 8e. Then, the S-RFF circuit 31
is reset, its output terminal Q goes to the L level as shown in FIG. 8c, and the output of the AND circuit 33 also goes to the L level as shown in FIG. 8d. The pulsing operation, that is, the conveyance operation corresponding to the work is completed.

During the series of conveyance operations from time T3 to 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. 8m. When this happens, the output of the knot circuit 53 is inverted to the L level, and the output of the AND circuit 40 becomes the 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 circuit becomes H level as shown in FIG. 8g. 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. 8k, the output of the AND circuit 40 is suppressed to the L level as shown in FIG. goes high as shown in FIG. 8l, so the S-RFF circuit 52 is set and its output goes high as shown in FIG. 8m. 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.

Furthermore, 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. 7 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 by pulsing using 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 H level, there is no line pressure in which the following load 13 is pushed by the load 13 that is about 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 the above fluidized shelf system will be described with reference to FIGS. 9 to 11.

FIG. 9 shows its configuration. Here, sensors 27a to 27h are provided on the entrance 12 side of the bays 24a to 24h, and sensors 28 to 28h are provided on the exit 15 side of the bays 24a to 24h, respectively. Further, pulsing solenoid valves provided in each bay 24h are designated as 66a to 66h.

That is, the outputs of the sensors 27a to 27h, 28a to 28h on the entrance 12 side and the exit 15 side are supplied to the input circuit 62 via the input terminals 61a to 61p of the priority control device 60, respectively. ing. This input circuit section 62 sends on/off information of each sensor 27a to 27h, 28a to 28h to a pulsing order setting circuit section 63.
It is intended to be transmitted to This pulsing order setting circuit section 63 is composed of, for example, a microcomputer, etc., and includes a main control section 631, a timer time setting section 632 having a plurality of timer time setting switches, a control program storage section 633, and a pulsing order storage section. section 634 and timer time storage section 63
It consists of 5.

In other words, this pulsing order setting circuit section 63
The main control unit 631 determines which bay 24a is selected based on the on/off information of each sensor 27a to 27h and 28a to 28h transmitted from the input circuit 62.
27h to 27h are ready for pulsing operation and sequentially stores them in the pulsing order storage unit 634 to set the priority order.
By sequentially storing the timer time set by the timer time setting unit 64 in the timer time storage unit 67 by external operation, the sensors 27a to 27h, 28
The on-delay time from a to 28h, the on-time and off-time of pulsing, and the cycle time (from the start of pulsing to the stop of pulsing) can be set. Then, from the main control unit 631 to the timer time storage unit 635
A pulsing operation start command for each bay 24a to 24h is transmitted to the output circuit section 64 in accordance with each set time stored in the pulsing order storage section 634 in priority order stored in the pulsing order storage section 634.

This output circuit unit 64 supplies a pulsing drive signal to the solenoid valves 66a to 66h of the bays 24a to 24h corresponding to the above-mentioned pulsing operation start command via output terminals 65a to 65h, and sets them in a state in which pulsing operation is possible. be.

The following operation will be explained in the above configuration.

First, each sensor 2 installed at the entrance 12 or 15
The outputs of 7a to 27h and 28a to 28h remain on (H level) for a certain period of time (on-day delay time) when warehousing or unloading work is performed, and turn off (L level) when the work is completed. )become. In other words, by detecting this operation, the priority control device 60 confirms that the bay where the work was performed is now ready for pulsing operation, and the number of the confirmed bay can be pulsed. The pulsing order is sequentially registered in the pulsing order storage unit 634 within the range in which the work is performed, and a pulsing operation start command is given to the solenoid valve of the bay where the work was performed in the registered order, and the pulsing drive signal is started. This start refers to the point in time when it is registered in the pulsing order storage section 634. Then, so that the on-times of the respective pulsing drive signals do not overlap with each other, the next pulsing drive signal is set to be on-time at the same time as the on-time of the previous pulsing drive signal ends. At this time,
When there is a bay that is ready for pulsing operation beyond the pulsing execution range, the number of this bay is registered as a temporary pulsing operation wait state. Then, when the pulsing of the bay with a higher rank is completed, the registered number of each bay is sequentially shifted to a higher rank, and the pulsing drive signal of the bay with the pulsing operation is started.

For example, the bays 24a to 24h are numbered 1st to 8th, and the pulsing drive signals for the electromagnetic valves 66a to 66h of each bay 24a to 24h are numbered 1st to 8th. The pulsing execution range of the control device is 5 bays,
Assume that each of the first to eighth bays 24a to 24h has an on time of 1 second, an off time of 4 seconds, and a cycle time of 60 seconds. Here, 2 seconds after the fourth bay 24d becomes ready for pulsing operation, the eighth bay 24h is activated, 7 seconds later the third bay 24c is activated, and 10 seconds later, the fifth bay 24e is activated.
If the first bay 24a becomes ready for pulsing operation after seconds, the fourth, eighth, third, fifth,
First bay 24d, 24h, 24c, 24e, 2
4a solenoid valves 66d, 66h, 66c, 66e,
66a are provided with fourth, eighth, third, fifth, and first pulsing drive signals as shown in FIGS. 10a to 10e, respectively. In the figure, T1 indicates on time and T2 indicates off time.

That is, in this priority order control device 60, the pulsing order setting circuit section 63 sets the number of the fourth bay 24d that first became capable of pulsing operation as the number 1, and sets the number in the pulsing order storage circuit 6.
At the same time, the output of the fourth pulsing drive signal is started, and the output of the fourth pulsing drive signal is started.
When h becomes ready for pulsing operation, its number is registered as second place and at the same time the pulsing drive signal is started. At this time, the eighth pulsing drive signal starts 2 seconds after the fourth pulsing drive signal, but the specified off time T
Even if the fourth pulsing drive signal ends, the on-time T1 is not set, but the on-time T1 is set at the end of the fourth pulsing drive signal. Thereafter, similarly, the third, fifth, and first bays 24c, 24e, and 24a are placed in 3rd place,
Register as 4th and 5th place, and the corresponding 3rd, 5th,
Start the first pulsing drive signal. At this time, the on-time T1 is set for each pulsing drive signal from the 1st to the 5th position, and then returns to the 1st position and is set sequentially, and when the cycle time of 60 seconds has elapsed, the output is set. It's like a stop.

Further, the on-times of the fourth, eighth, third, fifth, and first pulsing drive signals are each 1 second,
If the time is different from 1.5 seconds, 0.5 seconds, 1.5 seconds, 1.5 seconds,
The output timing of each pulsing drive signal is as shown in 11a to 11e, respectively. In other words, in this case as well, as in the case shown in FIG.
The off-time T2 is delayed by a predetermined time or more so that the on-time T1 is reached at the end of the off-time, so that the on-time is set cyclically and pulsing is not performed at the same time.

Although not shown in the figure, when the off-time T2 is 4 seconds, the on-time T1 is sequentially delayed even if the pulsing operation execution range is set to 5 or more. Bay pulsing can be done simultaneously. In the above embodiment, each bay is a unit of one block, but if the bay is divided into several blocks or adjacent lanes are grouped together into one block, and each block is provided with the above-mentioned conveying means, the bay can be divided into one block. However, it is possible to simultaneously perform pulsing of a plurality of blocks in arbitrary block units.

Therefore, the control device of the fluidized shelf system configured as described above detects the block that is ready for pulsing operation, sets the pulsing priority order, and returns the block to the state that allows pulsing operation so that the off time does not overlap. Since the blocks are sequentially pulsed, it is possible to transfer the loads of multiple blocks at the same time using an economically sized main pipe and the equipment in the main pipe, which is extremely efficient from both a functional and economic point of view. It will be good.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the fluidized shelf system, Figures 2 and 3 are block diagrams showing the conveying means used in the fluidized shelf system, and Figure 4 shows the compressed air supply route used in the conveying means. 5 is an external view showing a fluidized shelf system to which the present invention is applied, FIG. 6 is a side view showing one bay taken out from the fluidized shelf system, and FIG. 7 is a conveyance control of the bay. FIG. 8 is a time chart for explaining the operation of the control device; FIG. 9 is a block circuit diagram showing an embodiment of the control device for a fluidized shelf system according to the present invention; 10 and 11 are time charts for explaining the operation of this embodiment. 11...Rail, 12...Warehouse entrance, 13...Cargo, 14
...Pallet, 15...Outlet, 16...Groove, 17...Roller, 18...Support, 19...Roller unit, 2
0...Air hose, 21...Legs, 22, 23...Through holes, 24a-24h...Bay, 27, 27a-27
h, 28, 28a to 28h...sensor, 29...OR circuit, 30, 38, 39, 42, 49...timer circuit, 31, 52...S-RFF circuit, 32, 43,
50, 53...Knot circuit, 33, 36, 37, 4
0, 41...AND circuit, 34, 56...Switch,
35, 57... terminal, 44, 54... amplifier circuit, 45
... Relay circuit, 47 ... AC power supply, 48 ... Electromagnetic coil, 55 ... Display section, 60 ... Priority control device, 6
1a to 61p...input terminal, 62...input circuit section, 6
3... Pulsing order setting circuit section, 631... Main control section, 632... Timer time setting section, 633... Control program storage section, 634... Pulsing order storage section, 635... Timer time storage section, 64... Output circuit section, 65a~ 65h...output terminal, 66a to 66h
…solenoid valve.

Claims (1)

[Claims] 1 A rail on which an article is placed and installed with an inclination, and a first rail for transporting the article by gravity along the rail while compressed air is supplied to the rail.
and a second state in which transportation of the article is stopped in a state where compressed air is discharged from the rail or is not supplied. Detection means 27a to 27h, 28a to 28a for detecting a block in which an article loading/unloading machine is present within a predetermined range of an article entrance or an exit for a predetermined period of time or more among the plurality of blocks in the individual fluid shelf system.
28h, and this means 27a-27h, 28a-2
Priority storage means 62, 631, 6 for setting and storing the priority of blocks in the order detected by 8h.
33,634 and this means 62,631,63
Conveying operation control means 631, 632, 63 for controlling the compressed air supply and the compressed air discharge or non-supply state time in the order prioritized by No. 3, 634 to simultaneously execute the conveying means of each block.
3,635,64. A control device for a fluidized shelf system.