JP2006143476A - Take-in/take-out device of shelf facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a take-in/take-out device of a shelf facility for acquiring reliability of a user by monitoring a change itself of an actual part, so that a cargo can be always normally delivered. <P>SOLUTION: This take-in/take-out device has a brake device of a wheel of a traveling car body, a traveling electric motor for driving the wheel, a car body side rotary encoder 21 for detecting a moving distance of the traveling car body, a travel control part 31 for moving the traveling car body to a designated travel position by driving the traveling electric motor and the brake device, and a brake effectiveness monitoring part 35 for outputting a maintenance command, when this detected moving distance of the traveling car body exceeds an allowable value or a specific value, by detecting the moving distance of the traveling car body after braking the wheel by the brake device by counting a pulse of the car body side rotary encoder 21 with a brake signal outputted to the brake device from the travel control part 31 as a reset and execution signal. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a loading / unloading apparatus used in a shelf facility such as an automatic warehouse.

  Conventionally, the above-described shelf equipment includes a storage shelf in which a plurality of compartment storage spaces (load storage portions) for storing loads are arranged vertically and horizontally, a traveling vehicle body that travels along the storage shelf, and the traveling vehicle body. A lifting platform (elevating body) that is moved up and down along the suspended mast, and a fork that is provided on the lifting platform and delivers the load by moving the forks in and out of the compartment storage space and the loading / unloading port of the storage shelf. It comprises a loading / unloading device (stacker crane; load transporting means) having a device (delivery means), etc., and the operation of this stacker crane causes the loading / unloading of cargo and the storage shelf A load is transferred between one compartment storage space and the other compartment storage space.

  In addition, due to secular changes, the travel position of the traveling vehicle body, the lifting position of the lifting platform, and the position of the fork device to move out of the fork device will cause a problem that it becomes impossible to deliver normal loads. , For each component constituting the fork device, the basic data consisting of any one or a combination of the lifetime, maintenance time, lifetime operation count, maintenance operation count, and the operation time and / or operation count for each component The replacement / inspection time for each part is predicted based on the operation status data included, and the replacement / inspection of the part is performed based on this prediction, so that normal delivery of goods can always be performed.

  However, when replacement / inspection is performed based on the prediction of the operation time and the number of operations for each part, there are many situations in which it is not actually necessary to perform replacement or inspection yet. This is thought to be due to variations in the actual load applied to each part.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a shelf equipment loading / unloading device that can acquire the trust of the user by monitoring the actual change of the parts itself so that the delivery of goods can be normally performed normally. .

  In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is characterized in that a shelf facility for loading and unloading the load between a plurality of load storage units for storing the load and a loading / unloading port is provided. A traveling vehicle that is supported by a plurality of wheels and that travels along a load storage portion by driving the wheels, and a lifting rope that extends along a column that is suspended on the traveling vehicle. A lifting body that is suspended and supported by the body and is vertically moved, and a delivery device that is provided on the lifting body and delivers the load to the load storage unit or the loading / unloading port by moving a loading / unloading tool. The wheel body braking means, a traveling electric motor for driving the wheel body, a movement detecting means for detecting the amount of movement of the traveling vehicle body, and driving the traveling electric motor and the braking means. To move the vehicle body to the specified travel position. A travel control unit, and a braking signal output from the travel control unit to the braking means is used as a reset and execution signal, so that the travel amount of the traveling vehicle body after the wheel is braked by the braking means is moved. When the detected movement amount of the traveling vehicle body exceeds an allowable value or a certain value, a maintenance command is output.

  According to the above configuration, when a braking signal is output from the travel control unit to the braking unit, the amount of movement of the traveling vehicle body after the braking unit is braked by the braking unit is detected, and the amount of movement is set to an allowable value or When it exceeds a certain value, a maintenance command is output. When the operator performs maintenance / adjustment of the braking means in accordance with the maintenance command, the traveling vehicle body can always stop at the same position after braking, and normal load transfer can be performed.

  The invention according to claim 2 is the invention according to claim 1, wherein the detected movement amount of the traveling vehicle body is stored, an average value of the movement amount of the past traveling vehicle body is obtained, and the obtained average value is obtained. When the value exceeds an allowable value or a certain value, a maintenance command is output.

  According to the above configuration, the average value of the travel amount of the traveling vehicle body in the past is obtained, and when the obtained average value exceeds the allowable value or a constant value, a maintenance command is output. Therefore, the influence of variation in the travel amount of the traveling vehicle body after braking is eliminated, and maintenance and adjustment of the braking means can be performed at an appropriate time.

  The rack equipment take-in / out apparatus of the present invention detects the amount of movement of the traveling vehicle body after the brake is braked by the braking means when the brake is braked by the braking means, and this movement amount is an allowable value. Alternatively, when a certain value is exceeded, a maintenance command is output, so that the operator can perform maintenance / adjustment of the braking means in response to the maintenance command, so that the traveling vehicle body always stops at the same position after braking. It has the effect that it can always transfer a normal load.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a shelf facility according to an embodiment of the present invention.
As shown in FIG. 1, the shelf facility FS includes two storage shelves A that are installed at an interval so that the article loading and unloading directions face each other, and a work path B that is formed between the storage shelves A. A stacker crane (an example of a loading / unloading device) C that automatically travels the vehicle is provided, and each storage shelf A is provided with a large number of article storage units (load storage units) D arranged vertically and horizontally in parallel.

  In the work path B, a traveling rail 1 is installed along the longitudinal direction of the storage shelf A, and a controller for inputting a loading / unloading command to the stacker crane C in the article loading / unloading section E installed on one end side of the work path B. E1 and a pair of loading platforms (an example of a loading / unloading port) E2 are provided across the traveling rail 1, and the stacker crane C travels along the traveling rail 1 based on the loading / unloading command, It is configured as a loading and unloading transport vehicle that loads and unloads articles (loads) F placed on a pallet P between E2 and the article storage unit D.

  As shown in FIG. 2, the stacker crane C is provided on a traveling vehicle body 2 that travels along the traveling rail 1 and before and after the elevator 3 (an example of an elevator) 3 and the elevator 3 that guides and supports the elevator 3 so as to be movable up and down. A pair of elevating masts (an example of a column body suspended from the traveling vehicle body) 4 is provided, and the elevating table 3 is provided with a fork device (an example of delivery means) 5 for transferring articles.

  The lifting platform 3 is suspended and supported by a lifting chain (an example of a lifting rope) 8 connected to both the left and right sides. The lifting chain 8 includes a guide sprocket 9 provided on the upper frame 7 and one side. Is wound around a guide sprocket 10 provided on the lifting mast 4 and connected to a winding drum (an example of winding means) 11 provided at one end of the traveling vehicle body 2.

  Then, the take-up drum 11 is driven and rotated in the forward and reverse directions by an elevating electric motor M1, which is a so-called inverter type motor, so that the elevating platform 3 is driven up and down by unwinding and winding operation of the elevating chain 8. It is configured.

  The lifting position of the lifting platform 3 is not shown in FIG. 2 or the like, but is connected to the rotating shaft of the winding drum 11 and is an example of a drive-side rotary encoder (an example of winding detection means) for detecting the amount of rotation of the shaft. ) 18 (FIG. 7) and the lift table side rotary encoder (an example of the lift detection means) 19 attached to the lift 3 is managed based on detection information. As shown in FIG. 3, the elevator base-side rotary encoder 19 has a sprocket 19 a attached to a rotating shaft thereof meshed with a chain 20 laid vertically on one side of the elevator mast 4. As the elevating and lowering of the sprocket 19a, the up and down movement of the elevating platform 3 is detected. One of the lifting masts 4 is provided with a lower limit detection limit switch 25 for detecting that the lifting platform 3 is lowered to the lower limit position.

  As shown in FIG. 7, the detection information on the lifting platform-side rotary encoder 19 and the lower limit detection limit switch 25 is input to the lifting control unit 30 of the crane controller CC, and the drive-side rotary encoder 18, the lifting platform-side rotary encoder 19, The detection information of the lower limit detection limit switch 25 is input to the lifting / lowering chain elongation monitoring unit 33 of the crane control device CC.

  As shown in FIG. 3, the traveling vehicle body 2 restricts the position of the front and rear wheels (an example of a wheel body) 12 that can travel on the traveling rail 1 and the lateral direction of the traveling rail 1 in the lateral direction of the vehicle body. A lower position restricting rotor 13 provided in a pair of left and right and two places before and after engaging with the traveling rail 1 and a traveling drive device 14 having a traveling electric motor M2 which is a so-called inverter type motor are provided. Yes.

  Further, as shown in FIG. 2, the upper frame 7 has a pair of left and right upper positions that sandwich the guide rail 6 from the left and right and roll about the vertical axis along the side surface as the stacker crane C travels. The regulating roller 17 is provided at the front and rear end portions in the traveling direction.

  One of the two wheels 12 in the longitudinal direction of the vehicle body is configured as a driving wheel 12a for propulsion driven by the electric motor M2, and the other wheel in the longitudinal direction of the vehicle body is freely rotatable. The stacker crane C is configured to be driven by the electric motor M2 for traveling and is capable of traveling along the traveling rail 1 while being prevented from falling by the upper position regulating roller 17 provided on the upper frame 7. It is configured. Further, the propulsion drive wheel 12a is provided with a brake device (an example of a braking means for a wheel body) 26 (FIG. 7) that stops the rotation of the drive wheel 12a by sandwiching the drive wheel 12a with a pad.

  The traveling position of the traveling vehicle body 2 is not shown in FIG. 2 and the like, but is connected to the rotating shaft of the traveling electric motor M2, and a drive-side rotary encoder 15 (FIG. 7) for detecting the rotation amount thereof. As shown in FIG. 3, management is performed based on detection information of a vehicle body side rotary encoder (an example of a movement detection means) 21 attached to the traveling vehicle body 2. The vehicle-body-side rotary encoder 21 has a sprocket 21 a attached to its rotating shaft meshing with a chain 22 laid along the traveling rail 1, and the sprocket 21 a rotates as the traveling vehicle body 2 travels. The traveling movement of the traveling vehicle body 2 is detected. Further, on the ground side, a photo-interrupter type HP detection sensor 24 for detecting the detection plate 23 installed at a home position (HP) where the article F placed on the pallet P with the loading table E2 is taken in and out. Is provided.

  As shown in FIG. 7, detection information of the vehicle body side rotary encoder 21 and the HP detection sensor 24 is input to the traveling control unit 31 of the crane control device CC, and the drive side rotary encoder 15, the vehicle body side rotary encoder 21, and the HP. The detection information of the detection sensor 24 is input to the brake effectiveness monitoring unit 35 of the crane control device CC.

  4 to 6, the fork device 5 includes a pair of front and rear fixed forks 41 provided on the lifting platform 3, and supports and guides these fixed forks 41 through a guide structure (not shown). Secondary forks 42 that are relatively movable in the left and right direction (length direction), and supported and guided by each secondary fork 42 via a guide structure (not shown) and relatively moved in the left and right direction (length direction). The primary fork 43 is composed of a primary fork 43, an exit / retreat drive device 44 for the secondary fork 42, an exit / retreat interlocking means 45 for the primary fork 43, and the like. The primary fork 43 and the secondary fork 42 constitute a loading / unloading tool.

  A rack gear 46 is formed on the bottom surface of each secondary fork 42 so as to be parallel to the retracting movement direction. An idle gear 48 and a transfer electric motor M3 provided so that the drive gear 49 meshes with one idle gear 48 are constituted. The front and rear pinion gears 47 are connected by a connecting rod 50, and the driving force of the transfer electric motor M3 is transmitted to the other pinion gear 47 through the connecting rod 50.

  Further, the exit / retreat interlocking means 45 includes a pair of chains (fork exit / exit chain; an example of an exit / exit rope) 51 and 52 that are distributed and locked to both ends of the fixed fork 41, and these chains 51, 52. And the other end of the chains 51 and 52 are distributed to both ends of the primary fork 43 and are engaged with each other. It has been stopped.

  With the above-described configuration, the fork device 5 transfers the article F placed on the pallet P to the article storage section D of the storage shelf A or the loading table E2 of the article loading / unloading section E by moving the loading / unloading tool. That is, by rotating the drive gear 49 by the transfer electric motor M3, one pinion gear 47 is rotated through one idle gear 48, and the other pinion gear 47 is rotated through the connecting rod 50 by the rotation of the one pinion gear 47. The pinion gears 47 are simultaneously rotated, and the rotation of the pinion gears 47 causes the secondary forks 42 to move in the left-right direction with respect to the fixed forks 41 via the rack gears 46. The primary fork 43 is pulled in the moving direction of the secondary fork 42 through the ring bodies 53 and 54, respectively, and both the primary forks 43 are moved in the same direction. By the movement of the primary fork 43, the article F placed on the pallet P is delivered.

  The retracted / retracted position of the primary fork 43 of the fork device 5 is managed based on detection information of a transfer rotary encoder (an example of movement amount detection means) 56 connected to the rotation shaft of the transfer motor M3. Further, in order to detect that the primary fork 43 has returned to the central position of the lifting platform 3, a detection object 57 made of a reflector is provided at the center position of the primary fork 43, and this detection target is provided at the center of the fixed fork 41. A central position detection sensor (an example of a central position detection means) 58 including a photoelectric switch for detecting the body 57 is attached.

  The detection information of the transfer rotary encoder 56 and the center position detection sensor 58 is input to the transfer control unit 31 and the fork chain extension monitoring unit 34 of the crane control device CC as shown in FIG.

  As shown in FIG. 7, the crane control device CC receives a conveyance command from the controller E <b> 1, drives the lifting electric motor M <b> 1, and lifts the lifting platform 3 to a specified lifting position. A traveling control unit 31 that drives the traveling electric motor M2 and the brake device 26 to move the traveling vehicle body 2 to a designated traveling position; and a primary fork 43 of the fork device 5 that drives the transfer electric motor M3. The transfer control unit 32 for transferring the article F by moving the article F back and forth is provided, and controlled by the control units 30, 31, and 32, the article F is transported and the articles are stored between the article storage units D and the like. F is transferred.

In addition, as shown in FIG. 7, the crane control device CC is provided with an elevating chain elongation monitoring unit 33, a fork chain elongation monitoring unit 34, and a brake effectiveness monitoring unit 35, in order to normally deliver the article F. Further, the extension of the lifting chain 8, the extension of the fork chains 51 and 52, the effectiveness of the brake device 26, and the like are monitored. Hereinafter, the monitoring units 33, 34, and 35 will be described in detail.
“Elevation Chain Elongation Monitor 33”
Detection information of the drive-side rotary encoder 18, the lifting platform-side rotary encoder 19, and the lower limit detection limit switch 25 is input to the monitoring unit 33. As shown in FIG. The driving distance detector 61 that counts the pulse signal input from the driving rotary encoder 18 and measures the winding amount (driving distance) of the elevating chain 8 and the detection information of the lower limit detection limit switch 25 The movement distance detection unit 62 that counts the pulse signal input from the lift table side rotary encoder 19 and measures the actual lift distance (movement distance) of the lift table 3, and is output by the lift control unit 30. The drive of the raising / lowering chain 8 measured by the driving distance detector 61 using the raising / lowering end signal as an execution signal. The difference between the distance and the actual moving distance of the lifting platform 3 measured by the moving distance detector 62, that is, the subtractor 63 that calculates the extension amount of the lifting chain 8 and the lifting end signal output by the lifting controller 30 are executed. As a signal, a storage unit 64 that stores the amount of elongation of the lifting chain 8 obtained by the subtracting unit 63 and a lift end signal output by the lift control unit 30 are stored in the storage unit 64 as an execution signal. The determination unit 65 is configured to determine the maintenance time of the lifting chain 8 based on the data of the extension amount of the lifting chain 8.

  The determination unit 65 outputs a maintenance request (maintenance command) to the controller E1 when the latest data out of the extension amount data of the lifting chain 8 stored in the storage unit 64 exceeds an allowable value (or a constant value). In addition, the tendency is detected from the data of the amount of elongation of the lifting chain several times in the past, and the predicted value after the lifting control is executed a plurality of times (for example, 10 times) is obtained, and this predicted value can exceed the allowable value. If it is determined, a maintenance prevention request (maintenance prevention command) is output to the controller E1. When the controller E1 inputs the maintenance request or the prevention request, the controller E1 displays it on the screen.

In this way, when the amount of elongation of the lifting chain 8 exceeds the allowable value, a maintenance request is displayed on the control E1, so that the operator can recognize the necessity of maintenance and adjust the lifting chain 8. Further, a predicted value of the amount of elongation of the lifting chain 8 is obtained, and when it is determined that the predicted value exceeds the allowable value, a maintenance prevention request is displayed, so that maintenance / adjustment of the lifting chain 8 is performed in advance. Preparation can be performed, and maintenance and adjustment can be executed in a planned manner. As described above, the amount of elongation of the lifting / lowering chain 8 is always maintained and adjusted within an allowable value (or within a certain value), so that the lifting platform 3 can always be stopped at a normal lifting position and normal load transfer can be performed. Can be performed.
"Fork chain growth monitoring unit 34"
Detection information of the transfer rotary encoder 56 and the center position sensor 58 is input to the monitoring unit 34, and the monitoring unit 34 is input from the transfer rotary encoder 56 as shown in FIG. When the primary fork 43 is withdrawn and withdrawn from the primary fork 43, the movement distance of the fork retracting chains 51 and 52 (the amount of movement; corresponding to the amount of extension of the fork retracting chains 51 and 52) is measured. The movement distances of the fork retracting chains 51 and 52 obtained by the movement distance detection unit 71 using the detection information of the distance detection unit 71 and the central position sensor 58 that operates when the primary fork 43 returns to the center as an execution signal. And a fork exit / retreat channel stored in the storage unit 72 using the detection information of the central position sensor 58 as an execution signal. Based on the data of the moving distance of over emissions 51 and a determination unit 73 a maintenance timing of the retraction chains 51, 52 out forks.

  The determination unit 73 issues a maintenance request (maintenance command) when the latest data out of the movement distance data of the fork egress / retreat chains 51 and 52 stored in the storage unit 72 exceeds an allowable value (or a constant value). Output to the controller E1, and detect the tendency from the movement distance data of the fork exit / retreat chains 51 and 52 in the past several times, and obtain the predicted value after executing the transfer control a plurality of times (for example, 10 times). Then, it is determined whether there is a possibility that the predicted value exceeds an allowable value (or a constant value), and if it is determined, a maintenance prevention request (maintenance prevention command) is output to the controller E1. When the controller E1 inputs the maintenance request or the prevention request, the controller E1 displays it on the screen.

As described above, when the moving distance (elongation amount) of the fork retracting chains 51 and 52 exceeds the allowable value (or a constant value), a maintenance request is output and displayed to the control E1, so that the worker needs maintenance. And fork exit / retreat chains 51 and 52 are maintained and adjusted. Further, a predicted value of the moving distance (elongation amount) of the fork exit / retreat chains 51 and 52 is obtained, and if it is determined that the obtained predicted value exceeds an allowable value (or a constant value), a maintenance prevention request is displayed. Thus, it is possible to prepare in advance for maintenance / adjustment of the fork exit / retreat chains 51, 52, and to perform maintenance / adjustment systematically. As described above, the primary fork 43 can always be stopped at the normal exit / retreat position by maintaining / adjusting the extension amount of the fork exit / retreat chains 51, 52 within the allowable value (or within a certain value). A normal load can be transferred.
"Brake effectiveness monitoring unit 35"
Detection information of the drive-side rotary encoder 15, detection information of the vehicle-body-side rotary encoder 21, and detection information of the HP detection sensor 24 are input to the monitoring unit 35. As shown in FIG. The driving distance detection unit 81 that counts the pulse signal that is reset by the detection information of the HP detection sensor 24 and that is input from the driving rotary encoder 15 to measure the driving distance of the traveling vehicle body 2, and the detection of the HP detection sensor 24. The travel distance detection unit 82 that measures the actual travel distance of the traveling vehicle body 2 by counting the pulse signal input from the vehicle body side rotary encoder 21 after being reset by the information, and the travel end signal output by the travel control unit 31 As an execution signal, the driving distance of the traveling vehicle body 2 measured by the driving distance detector 81 and the moving distance detector 82 are used for measurement. The subtraction unit 83 that calculates the difference in the actual travel distance of the traveling vehicle body 2, that is, the degree of wear of the wheels 12, and the travel end signal output from the travel control unit 31 are used as execution signals to be obtained by the subtraction unit 83. The first storage unit 84 that stores the degree of wear of the wheels 12 and the travel end signal output by the travel control unit 31 are used as execution signals to determine the degree of wear of the wheels 12 stored in the first storage unit 84. Based on the first determination unit 85 that determines the maintenance time of the wheel 12 based on the brake signal output from the traveling control unit 31 and the execution signal, the pulse signal input from the vehicle body side rotary encoder 21 is counted and traveled. The braking distance detection unit 86 that measures the braking distance of the vehicle body 2 and the travel end signal output by the travel control unit 31 are used as execution signals. Based on the braking distance stored in the second storage unit 87 using the second storage unit 87 for storing the braking distance obtained by the distance detection unit 86 and the travel end signal output from the traveling control unit 31 as an execution signal. And a second determination unit 88 that determines the maintenance time of the brake device 26.

  When the latest data out of the wear degree data of the wheels 12 stored in the first storage unit 84 exceeds the allowable value (or a constant value), the first determination unit 85 requests maintenance of the wheels 12 (maintenance). Command) is output to the controller E1, and the tendency is detected from the data of the degree of wear of the wheel 12 several times in the past, and a predicted value is obtained after running control is performed a plurality of times (for example, 10 times). It is determined whether there is a possibility that the value exceeds an allowable value (or a constant value), and if it is determined, a maintenance prevention request (maintenance prevention command) for the wheel 12 is output to the controller E1. When the controller E1 inputs a maintenance request or a prevention request for these wheels 12, the controller E1 displays the request on the screen.

  As described above, when the degree of wear of the wheel 12 exceeds an allowable value (or a constant value), a maintenance request is output and displayed to the control E1, so that the worker can recognize the necessity of maintenance and replace the wheel 12. . Further, a predicted value of the degree of wear of the wheel 12 is obtained, and when it is determined that the predicted value exceeds the allowable value (or a constant value), a maintenance prevention request is displayed, so that the maintenance value of the wheel 12 is preliminarily displayed. Setup can be performed, and maintenance can be executed systematically. As described above, maintenance is performed so that the degree of wear of the wheels 12 is always within the allowable value, so that the traveling vehicle body 2 can always be stopped at a normal traveling position, and a normal load can be transferred. .

  Further, the second determination unit 88 obtains an average value of the past multiple braking distances (for example, 10 times) stored in the second storage unit 87, and the average value exceeds an allowable value (or a constant value). If it is detected, a maintenance request (maintenance command) for the brake device 26 is output to the controller E1. When the controller E1 inputs a maintenance request for the brake device 26, the controller E1 displays it on the screen.

  In this way, when the average value of the braking distance of the brake exceeds the allowable value (or a constant value), a maintenance request is output and displayed to the control E1, so that the operator can recognize the necessity of maintenance, and the brake device 26 can be adjust. As a result, the effectiveness of the brake device 26 becomes constant, the vehicle can always be stopped at a normal travel position, and a normal load can be transferred. Further, by determining the average value of the braking distance of the brake, the influence due to the variation of the braking distance (the travel amount of the traveling vehicle body after braking) due to the weight of the article F on the lifting platform 3 is eliminated, Maintenance and adjustment of the brake device 26 can be performed at an appropriate time.

  In the present embodiment, the stacker crane C is used as a shelf equipment loading / unloading device. However, it is also possible to use a shelf equipment loading / unloading device that does not have a configuration corresponding to the traveling vehicle body 2 of the stacker crane C. It is. FIG. 11 shows an example of a shelf equipment loading / unloading device that does not include the traveling vehicle body 2. In FIG. 11, components having the same functions as those in the above embodiment are given the same reference numerals.

  The shelf facility shown in FIG. 11 stores, for example, an article F made of a container in one of the article storage sections D of the article storage sections D of the two storage shelves A installed at a predetermined interval in the front and rear direction. The article F stored in the predetermined storage shelf A can be taken out.

  A plurality of article storage portions D are provided in each of the pair of storage shelves A in a state of being parallel in the vertical direction and the horizontal direction. A loading / unloading section (loading / unloading port) E for upper and lower two-stage articles F is provided by using an article storage section D on the lower side of one storage shelf A located on the front side. The carry-in / out section E is provided with a roller conveyor RC for carrying the articles F into and out of the storage shelf A.

Further, at the front and rear intermediate portions of the pair of storage shelves A, there is a transfer device (an example of a loading / unloading device) C ′ that transfers the articles F between the respective article storage portions D and the carry-in / out portions E, and performs loading / unloading. Is provided.
The conveying device C ′ is suspended and supported by a chain (an example of a lifting rope) 8 and lifted and lowered vertically (an example of a lifting body) 3 over almost the entire vertical height of the storage shelf A. In addition, the loading / unloading tool (secondary fork and primary fork 43) is withdrawn / retracted by driving a fork egress / retreat chain (an example of an egress / retreat cable-like body). It comprises a fork device (an example of delivery means) 5 that delivers the article F to the part D or the carry-in / out part E. As described above, the transport apparatus C ′ does not have a configuration corresponding to the traveling vehicle body 2 of the embodiment. Note that the fork device 5 is movable on the lifting platform 3 (details will be described later).

  Also in the transport apparatus C ′ having such a configuration, the extension amount of the lifting / lowering chain 8 and the extension amount of the fork exit / retreat chain are calculated as in the above embodiment, and the calculated extension amount is an allowable value (or a constant value). A maintenance request is output when the value exceeds the value), a predicted value is obtained from the tendency of the amount of elongation, and a maintenance prevention request is output when the obtained predicted value exceeds the allowable value (or a constant value). Can do. Therefore, by maintaining and adjusting the extension amount of the lifting chain 8 within the allowable value (or within a certain value), the lifting platform 3 can always be stopped at the normal lifting position, and the normal load is transferred. In addition, the primary fork 43 can always be stopped at a normal exit / retreat position by maintaining and adjusting the extension amount of the fork exit / retreat chain within an allowable value (or within a certain value). Can be transferred.

  As shown in FIG. 12, the mechanism for allowing the fork device 5 to move laterally on the lifting platform 3 supports the fork device 5 and is configured to move laterally by four wheels 91, and the lifting platform. 3 are wound around pulleys 93A and 93B rotatably supported around the front and rear axis cores, and both ends are suspended from the box 92 along the side surface of the lifting platform 3. The drive belt 95 connected to the plate 94 and a transverse electric motor M4 that rotationally drives one pulley 93A. The drive belt 95 is moved in the longitudinal direction by the transverse electric motor M4, and the plate 94 The box body 92, that is, the fork device 5 is configured to be moved laterally on the lifting platform 3. Further, an optical distance measuring device is provided as a lateral movement detecting means for specifying the lateral movement position of the fork device 5 on the lifting platform 3. That is, the reflector 96 is installed at a right angle to the lateral movement origin position (HP position) of the fork device 5 in the lift 3, and the light beam is projected horizontally onto the plate 94 so as to face the reflector 96. A laser range finder 97 is provided. In addition, a rotary encoder 98 is provided in a state of being interlocked and connected to the rotation shaft of the electric motor M4 that moves the drive belt 95, and is made of a reflector plate that is provided at a lateral movement origin position (HP position) of the lifting platform 3. An HP sensor 100 including a photoelectric switch for detecting the detection body 99 is provided in the box 92.

  The extension amount of the drive belt 95 can also be monitored in the same manner as the lifting chain 8. That is, the actual moving distance of the fork device 5 measured by the laser range finder 97 and the drive amount detected by counting the pulses output from the rotary encoder 98 by the counter reset by the operation of the HP sensor 100 ( The driving amount of the driving belt 95 driven by the electric motor M4 for lateral movement) is compared, the elongation amount of the driving belt 95 is calculated, and a maintenance request is output when the calculated elongation amount exceeds an allowable value (or a constant value). In addition, a predicted value can be obtained from the tendency of the amount of elongation, and a maintenance prevention request can be output when the obtained predicted value exceeds an allowable value (or a constant value). Therefore, the fork device 5 can always be stopped at the normal lateral movement position and the load can be transferred normally by maintaining and adjusting the extension amount of the drive belt 95 within the allowable value (or within a certain value). be able to.

  In the present embodiment, the rotary encoders 19 and 21 are used as the movement detection means for detecting the movement distance (movement amount) of the traveling vehicle body 2 and the lift detection means for detecting the movement distance (lift amount) of the lifting platform 3. Although being used, an optical distance measuring device may be used instead of the rotary encoders 19 and 21. The distance measuring device includes a target reflector, and a laser rangefinder that projects a distance measuring beam onto the reflector and measures the distance using the reflected light. The travel distance of the traveling vehicle body 2 is measured by installing a reflector on one end of the work path B, and providing a laser range finder on the traveling vehicle body 2 that projects the beam light horizontally on the reflector opposite the reflector. The moving distance of the lifting / lowering table 3 is a laser measurement in which a reflecting plate is installed on the bottom surface of the lifting / lowering table 3 and the beam light is projected on the traveling vehicle body 2 vertically and horizontally toward the reflecting plate on the bottom surface of the lifting / lowering table 3. Measure by installing a rangefinder.

  In the present embodiment, in the fork device 5 which is a delivery means, the secondary fork 42 and the primary fork 43 are driven using the fork retracting chains 51 and 52, but other driving means such as a linear motor are used. It is also possible to drive using. Further, instead of the chains 51 and 52, other cords such as wires can be used. Furthermore, although the fork device 5 is constituted by a pair of front and rear forks (fixed fork 41, secondary fork 42, primary fork 43), it may be constituted by a single plate-like fork.

  In the present embodiment, the storage shelves A arranged side by side in the left-right direction are each configured to have a load storage portion D in the front-rear direction. However, each storage shelf A is not only in the front-rear direction but also in the left-right direction (depth direction). ), The load storage portion D may be arranged. At this time, the fork device 5 has a configuration (double deep type) in which the fork (in / out tool) can be positioned and retracted with respect to each load storage portion D in the left-right direction of each storage shelf A. Thus, the fork device 5 can be a double deep type.

  In the present embodiment, the pair of loading platforms E2 of the loading / unloading section E are used as loading / unloading ports for loading and unloading the articles F. However, these loading platforms E2 are dedicated to loading and unloading of the articles F. It can also be used as

  In this embodiment, so-called inverter type motors M1 and M2 are used as driving means for the traveling vehicle body 2 and the lifting platform 3. However, the moving speeds of the traveling vehicle body 2 and the lifting platform 3 are included in the motors M1 and M2 themselves. And a driving means for driving the vehicle body 2 and the lifting platform 3 such as a circuit for performing feedback control so that the speed commanded from the crane control device CC and the detected moving speed coincide with each other. The specific configuration of can be variously changed.

It is a principal part perspective view of the shelf installation in embodiment of this invention. It is a schematic block diagram of the stacker crane of the same shelf installation. It is a principal part enlarged view of the stacker crane of the same shelf installation. It is a schematic plan view of the fork device of the shelf equipment. It is a schematic side view of the fork device of the shelf equipment. It is operation | movement explanatory drawing by the chain for exit / exit of the fork apparatus of the same shelf installation. It is a control block diagram of the same shelf installation. It is a block diagram of the chain elongation monitoring part for raising / lowering of the crane control apparatus of the same shelf installation. It is a block diagram of the chain elongation monitoring part for forks of the crane control apparatus of the same shelf installation. It is a block diagram of the brake effect part of the crane control apparatus of the same shelf installation. It is a principal part perspective view of the shelf installation in other embodiment of this invention. It is a schematic side view of the lifting platform of the same shelf equipment.

Explanation of symbols

FS Shelf equipment A Storage shelf B Work path C Stacker crane C 'Conveying device CC Crane control device D Load storage unit E Article loading / unloading unit E1 Controller M1 Lifting electric motor M2 Traveling electric motor M3 Transfer electric motor M4 For lateral movement Electric motor 1 Traveling rail 2 Traveling vehicle body 3 Lifting platform 4 Lifting mast 5 Fork device 8 Lifting chain 11 Winding drum 12 Wheels 15, 18, 19, 21, 56, 98 Rotary encoder 24, 100 HP detection sensor 25 Lower limit detection limit Switch 26 Brake device 43 Primary fork 51, 52 Fork extension / retraction chain 58 Center position detection sensor 95 Drive belt 96 Detected object 97 Laser rangefinder

Claims (2)

A loading / unloading device for a shelf facility for loading and unloading the load between a plurality of load storage units for storing the load and a loading / unloading exit,
A traveling vehicle body supported by a plurality of wheel bodies and traveling along a load storage portion by driving the wheel bodies;
A lifting body that is suspended and supported by an elevating cable-like body along a pillar suspended from the traveling vehicle body, and that is lifted vertically.
It is provided on this elevating body, and is composed of delivery means for delivering the load to the load storage unit or the loading / unloading port by moving a loading / unloading tool out and out,
Braking means for the ring,
An electric motor for traveling that drives the ring body;
Movement detection means for detecting the amount of movement of the traveling vehicle body;
A travel control unit for driving the travel electric motor and the braking means to move the travel vehicle body to a specified travel position;
Using the braking signal output from the traveling control unit to the braking means as a reset and execution signal, the movement detecting means detects the amount of movement of the traveling vehicle body after the wheel is braked by the braking means. A shelf installation / removal device that outputs a maintenance command when a detected movement amount of a traveling vehicle body exceeds an allowable value or a certain value. The detected travel amount of the travel vehicle body is stored, an average value of the travel amount of the travel vehicle body in the past is obtained, and a maintenance command is output when the obtained average value exceeds an allowable value or a constant value. Item 2. The equipment for taking in and out the shelf equipment according to Item 1.

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