JP2004277026A - Safety device for article storage facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent drop of an elevating body not caused by rupture and loosening of a rope body. <P>SOLUTION: This safety device for article storage facility is constituted in such a way that the article storage facility is provided with an elevating driving means having a lifting belt 28A, a lifting wire 28B, and a pulling-down wire 32 connected with the elevating body 21 having a transfer device, a drive wheel body 30 around which the lifting wire and the pulling-down wire are wound in the directions different from each other, and an elevating driving device 31 rotating and driving the drive wheel body 30 forward and reversely. It is provided with an elevating body position detector 122 detecting travel of the elevating body 21, a rotation drive detector 123 detecting amount of rotation of the elevating driving device 31, and a drive wheel body fixing device 124 fixing the drive wheel body. It is further provided with a drop prevention control part 125 which determines deviation of a position of the elevating body 21 by the elevating body position detector 122 and a position of the elevating body 21 by the rotation drive detector 123 to operate the drive wheel body fixing device 124 and stop drop of the elevating body 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for preventing an elevating body from dropping in an article storage facility in which articles are taken in and out of a storage space of a shelf by an elevating body having a transfer device.
[0002]
[Prior art]
For example, in a three-dimensional automatic warehouse or the like, an elevating body equipped with a transfer device for taking articles in and out of a shelf is generally hung by a rope such as a chain or a wire rope, and winds up or pushes the rope. Thus, the lifting body is configured to be driven up and down.
[0003]
In the above structure of the lifting mechanism, if the rope body is cut during the loading / unloading operation of the article, the lifting body may fall and cause a serious accident. And Patent Literature 2 in which a lifting and lowering body is fixed by sandwiching a wire rope suspended vertically along a column.
[0004]
[Patent Document 1]
JP-A-6-27722 (FIG. 2)
[0005]
[Patent Document 2]
Japanese Patent No. 3163429 (FIG. 2)
[0006]
[Problems to be solved by the invention]
However, for example, in the case of an elevating mechanism that raises and lowers the elevating body by winding a lifting rope and a pulling down rope connected to the elevating body in different directions from each other around the driving drum, a brake of the elevating motor that rotates the driving drum is used. Articles that are added to the elevating body due to failure, breakage or loosening of the bolts of the shaft coupling between the motor for raising and lowering and the drive drum, slippage of the mechanical lock mechanism between the shaft coupling and the shaft, and breakage or loosening of the joint bolts of the driving drum. There is a possibility that the driving drum idles due to the load of the above, and the elevating body descends and falls. In this case, since the lifting cord and the pulling cord are not loosened, the conventional safety device does not work.
[0007]
An object of the present invention is to solve the above-mentioned problems and to provide a safety device for an article storage facility capable of preventing a falling of an elevating body due to breakage or loosening of a cable body.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is provided between a traveling body movable along an insertion / removal surface of an article storage section of a shelf and an article storage section provided on the traveling body so as to be movable up and down. In an article storage facility including a lifting body having a transfer device capable of taking articles in and out, a lifting rope and a pulling rope connected to the lifting body, and a lifting rope and a pulling down Lifting and lowering drive means having a lifting and lowering driving wheel body wound with ropes in different directions, and a lifting and lowering driving device for driving the lifting and lowering driving wheel forward and reverse rotation, the lifting and lowering body, the lifting rope, Elevating / circulating mechanism detecting means for detecting the movement or rotation of the elevating / circulating mechanism including the lower rope and the elevating / driving wheel body; rotating drive detecting means for detecting the amount of rotation of the elevating / driving device; The lifting rope or the pulling rope Elevating / circulating mechanism fixing means capable of fixing the position of the elevating body based on the detection value of the elevating / circulating mechanism detecting means, the position of the elevating body based on the detection value of the elevating / circulating mechanism detecting means, and the detection value of the rotation drive detecting means And a fall prevention means for stopping the elevating body by operating the elevating / circulating mechanism fixing means by judging a positional deviation from the position of the elevating body due to the above.
[0009]
According to the above configuration, the fall prevention unit compares the position detection value of the component of the lifting / lowering circulating mechanism obtained by the lifting / lowering circulating mechanism detection unit with the rotation amount of the lifting / lowering driving device by the rotation driving detection unit. It is possible to detect the descent of the lifting / lowering body in a state where the components of the circulation mechanism are not loosened or broken, whereby the lifting / lowering circulation mechanism can be fixed by the lifting / lowering circulation mechanism fixing means. Therefore, it is possible to reliably prevent the falling of the lifting body, which could not be prevented by the conventional fall prevention device for preventing the falling of the lifting body caused by the loosening or breakage of the constituent members of the lifting / lowering circulation mechanism. Safety can be improved.
[0010]
The invention according to claim 2 is provided with a warning means activated by the fall prevention means.
According to the above configuration, the operator is notified of the failure by the warning means, and prompt measures can be taken.
[0011]
According to a third aspect of the present invention, the lifting and lowering mechanism fixing means includes a locking member capable of being engaged between the driving wheel body and a fixing member disposed adjacent to the driving wheel body, and a locking member capable of engaging the locking member. And a fixed operating portion for moving the movable member in the direction.
[0012]
According to the above configuration, with a simple configuration in which the locking member is engaged between the driving wheel body and the fixed member, the driving wheel body can be securely locked, and the lifting / lowering circulating mechanism can be reliably stopped. it can.
[0013]
In the invention according to claim 4, a weight for balance is interposed in the lifting rope, and the lifting body and the weight are lifted and lowered by the lifting body and the weight when the tension of the lifting rope is reduced. A lifting lock means for fixing is provided.
[0014]
According to the above configuration, the power of the lifting drive device can be significantly reduced by the balance weight, so that the manufacturing cost and the operation cost can be reduced. In addition, the lifting lock means can prevent a falling accident of the lifting body and the balance weight due to the cutting of the lifting rope body from occurring.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Here, an embodiment of an article storage facility according to the present invention will be described with reference to the drawings.
As shown in FIG. 2, a shelf 10 in which a plurality of article storage sections 12 are formed in a vertical direction and a horizontal direction is installed in a frame main body 11 composed of columns and the like, as shown in FIG. Each of the article storage units 12 provided at predetermined intervals in the vertical and horizontal directions is provided with a plurality of shelves 13 in the horizontal direction, and each shelf 13 is open to the front side and the vertical direction. A notch 14 is formed.
[0016]
The article 1 that can be stored in the article storage unit 12 via the shelf plate 13 is, for example, a container (Front Opening Unified Pot: a front opening integrated pod) 2 containing a semiconductor (wafer), and the container 2 is positioned. It is composed of an L-shaped pallet body 3 and the like which can be supported in a side view.
[0017]
A pair of the shelves 10 are arranged side by side with a passage 9 therebetween. Some of the article storage sections 12 in any of the shelves 10 are configured as a handling section 16 for loading and unloading the articles 1. A pair of left and right support members 17 are erected on the cargo handling portion 16 to form an operation space 18 that is open upward and forward and backward. The operating space 18 and the notch 14 are used so that a later-described insertion / removal tool moves in and out.
[0018]
The shelf 10 is provided with a loading / unloading unit 20 for putting the article 1 in and out of the article storage unit 12. The loading / unloading means 20 includes an elevating body 21 disposed in the passage 9 over substantially the entire length of the passage, and is supported and guided by the elevating body 21 so as to be reciprocally movable in the length direction of the passage (lateral direction). A horizontal body 40 and a transfer device 60 provided on the horizontal body 40 are provided.
[0019]
As shown in FIGS. 7 to 9, the elevating body 21 has a rectangular tubular frame shape, and a box-shaped frame body 22 is provided at a central portion in the longitudinal direction and on the front side. The lifting body 21 is guided to the shelf 10 side so as to be able to move up and down by an LM guide 23 interposed between the front side of the shelf 10 and the member on the shelf 10 side.
[0020]
As shown in FIG. 6, a pair of front and rear guide wheels 26, 26 provided in the upper part of the shelf 10 in the passage width direction and a front guide wheel provided in the floor side in the passage width direction. Body 34 and a drive wheel (elevating drive wheel) 30, and a lifting belt (lift cable) 28 </ b> A and an auxiliary wire 29 wrapped around the guide wheels 26, 26 from above. One end is connected to the box-shaped frame 22, and the other end is connected to a balance weight (weight) 27. Further, one end is connected to the box-shaped frame 22 from below, and the other end is wound down on the drive wheel 30 via the guide wheel 34, and a pull-down wire (pull-down rope) 32, and one end is a balance weight A lifting wire (lifting rope) 28B wound on the drive wheel 30 in the opposite direction to the pulling wire 32 via the guide sheave 33 and connected to the guide sheave 33 is provided. Is formed. The elevating drive means 25 for driving the elevating body 21 up and down is composed of the elevating and lowering circulation mechanism, and an elevating and lowering drive device (electric motor) 31 for driving the drive wheel 30 to rotate forward and reverse through a connecting shaft and a coupling. ing.
[0021]
In addition, the balance weight 27 is guided to the shelf 10 side via a guide roller (not shown) so as to be able to move up and down. A plurality of guide rollers 35 are provided above and below the box-shaped frame 22, respectively. A guide wire 33 is wound around the guide rollers 35 to guide the ascending and descending. Is fixed to the side.
[0022]
Therefore, by driving the drive wheel body 30 to rotate in the forward and reverse directions by the lifting drive device 31, the lifting body 21 can be driven up and down via each member of the lifting and lowering circulation mechanism. At that time, the elevating body 21 is guided by the LM guide 23 and the guide wire 33 so as to be able to move up and down. At this time, the lifting / lowering operation of the lifting / lowering body 21 is performed lightly while maintaining the balance by the balance weight 27. Therefore, the lifting / lowering drive device 31 may be of a small power.
[0023]
As shown in FIG. 7, the traversing body 40 is formed on an outer movable part 41 provided at a rear part of the elevating body 21, an inner movable part 42 arranged inside the elevating body 21, and the elevating body 21. The outer movable portion 41 and the inner movable portion 42 are integrated with each other via the slit portion 24. The traversing body 40 is supported on the lifting body 21 side by the LM guide 44 provided between the lifting body 21 side and the inner movable part 42 so as to be reciprocally movable in the direction of the passage length (left-right direction).
[0024]
As shown in FIGS. 6 and 7, the traversing drive device 45 for reciprocating the traversing body 40 includes a guide pulley 46 provided in the elevating body 21 and at both ends in the longitudinal direction, and the box-shaped frame body. A drive pulley 47 provided in the box 22, a traversing drive (electric motor) 48 provided in the box-shaped frame 22 for driving the drive pulley 47 to rotate forward and backward, a pair of guide pulleys 46 and a drive pulley The timing belt 49 includes a timing belt 49 wound around the belt 47 and a tension pulley 50. One portion of the timing belt 49 is connected to a connection portion 42 a of the inner movable portion 42.
[0025]
Therefore, the traversing body 40 can be reciprocated via the LM guide 44 by rotating and driving the drive pulley 47 by the traversing drive device 48 to push and pull the timing belt 49. A cable bear 51 is provided between the elevating body 21 and the inner movable part 42.
[0026]
In the transfer device 60, a rotary table 63 is provided on the outer movable portion 41 via a bearing 61 so as to be rotatable around a vertical axis 62. The rotary table 63 is connected to the rotary table 63 via a timing belt 64 or the like. A table rotating device 65 that is interlocked with the table is provided in the outer movable portion 41. An access mechanism 66 is provided on the turntable 63 so that the article 1 can be taken in and out of the article storage unit 12.
[0027]
The loading / unloading mechanism 66 is arranged on the rotary table 63 side, and is configured in the form of a middle bent arm that rotates a base end around the longitudinal axis 62. An arm whose base end is fixed to the rotary table 63 is provided. A body 67 and a plate-like loading / unloading device (load receiving member) 70 whose base end is connected to the free end of the arm 67 via an operating shaft 68 and a bearing 69 so as to be relatively rotatable. . The loading / unloading device 70 is configured to support the article 1 from below at its free end, and further provided with a positioning pin 71 that is engageable with the lower surface of the pallet body 3 at the free end.
[0028]
An arm driving device (such as a servomotor) 72 is disposed in the outer movable portion 41 in order to cause the insertion / removal mechanism 66 to bend inside, and an output shaft 73 of the arm driving device 72 is connected to the vertical axis. It is disposed so as to pass through a bearing 61 on a core 62 and a rotary table 63. The arm body 67 is formed in a case shape, and a transmission mechanism 74 is interposed therein. The transmission mechanism 74 includes a first wheel 75 fixed to the output shaft 73, a second wheel 76 fixed to a lower portion of the operating shaft 68 integrated with the insertion / removal device 70, and a first wheel 75. And a timing belt 77 that links the second wheel 76 with the second belt 76.
[0029]
Accordingly, the arm body 67 is rotated together with the rotary table 63 by the arm driving device 72, and the insertion / removal tool 70 to which the arm body 67 is connected is rotated by the transmission mechanism 74 to control the posture. The article 1 can be delivered / removed to / from the 21 and the cargo handling section 16 and moved up and down, for example, by 21 up and down operations.
[0030]
A case-like pedestal 80 is provided on the loading / unloading tool 70 from the support part of the article 1 to the front side, and the pedestal 80 controls the article 1 placed on the loading / unloading tool 70 from both left and right sides. A swing regulating member 81, a vertically movable swing regulating member 83 that regulates the upper side of the article 1, and a regulating member retracting drive unit 84 that rotates the vertical swing regulated member 83 are provided.
[0031]
Further, as shown in FIGS. 1 to 5, the article storage facility includes first safety devices (lifting lock means) 101A and 101B according to the present invention, and the present invention, in order to prevent the lifting body 21 from falling. And a second safety device 121 according to the first embodiment.
[0032]
The first safety devices 101A and 101B prevent the lifting body 21 and the balance weight 27 from dropping when the lifting belt 28A and the auxiliary wire 29 are cut off by some accident, and are provided on the lifting body 21. Since the first safety device 101A and the first safety device 101B provided on the balance weight 27 have the same configuration, only the lifting / lowering body 21 side will be described, and description on the balance weight 27 side will be omitted.
[0033]
That is, as shown in FIG. 4, the first safety device 101 </ b> A is provided between the lifting guide walls 102 which are arranged at regular intervals on the front surface of the box-shaped body 22 (the back surface on the balance weight 27 side). The lifting case 28 is connected to the lifting case 28, the lifting belt 28A and the auxiliary wire 29 are connected to the lifting case 36 via the hanging member 103, and the pulling wire 32 is directly connected to the lifting case 36 via the connecting member. Are linked. The hanging member 103 includes a mounting member 104 to which the lifting belt 28A and the auxiliary wire 29 are connected via a connecting member, and a plurality of hanging bolts 105 suspended from the mounting member 104. It is slidably penetrated through a connection hole 36 a on the upper surface of the suspension case 36, and is prevented from coming off at a predetermined position via a bush by a lower nut 105 a mounted below the suspension bolt 105. Reference numeral 105b denotes an intermediate nut which is attached to an intermediate portion of the suspension bolt 105 and regulates the lowering.
[0034]
A support plate 106 is fixed upright on the upper surface of the suspension case 36 in the width direction, and a clamp roll 108 is rotatably supported at the upper end corners of the support plate 106 via support pins 107 in the front-rear direction. . Each of the clamp rolls 108 is provided with a pressing member 108a projecting from an outer peripheral portion thereof, which is engaged between the clamp roll 108 and the elevating guide wall 102 by rotation, and an operating pin 108b is provided on the outer peripheral side of the front surface with the pressing member 108a. At a predetermined angle (about 135 degrees in the figure). An operating rod 111 is slidably mounted in a through hole 36b formed in the center of the upper surface of the hanging case 36, and an operating plate 112 attached to the upper end of the operating rod 111 and extending in the width direction is mounted. I have. The operation plate 112 is configured such that the intermediate nut 105b of the suspension bolt 105 is contacted from below to restrict the lowering. Further, at both ends of the operation plate 112, there are formed elongated holes 112a into which the operation pins 108b are fitted. Each is formed. A coil spring 113 for urging the operating rod 111 downward via a nut member 111a is provided below the operating rod 111 extending into the suspension case 36.
[0035]
Therefore, during normal operation, as shown in FIG. 4, the operating plate 112 is attached upward against the coil spring 113 by the intermediate nut 105 b of the suspension bolt 105 due to the tension of the suspension belt 28 A and the auxiliary wire 29. The clamp roll 108, which is urged and the operation pin 108b is fitted into the elongated hole 112a of the operation plate 112, has the pressing member 108b located at the lower part and is separated from the elevating guide wall 102.
[0036]
When an abnormality occurs in the lifting belt 28A and the auxiliary wire 29 and the tension is reduced and the elevating body 21 starts to fall, as shown in FIG. The operating plate 112 is pulled down, the clamp roll 108 is rotated in the direction of the arrow via the operating pin 108a by the elongated hole 112a, and the clamping member 108a is protruded toward the elevating guide wall 102 side and is interposed between the elevating guide wall 102. It is sandwiched. Thereby, the lowering of the elevating body 21 is stopped.
[0037]
The second safety device 121 is, apart from the first safety device 101, loosened or broken by the lifting belt 28A, the lifting wire 28B, the pulling wire 32, and the auxiliary wire 29 which are members of the circulation drive mechanism. This prevents the lifting body 21 and the balance weight 27 from falling in a state where the tension does not decrease due to the above.
[0038]
As shown in FIG. 1 to FIG. 3, an elevating body position detector (elevating / circulating mechanism detecting means) 122 for detecting the position of the elevating body 21, and a rotational drive detector such as a rotary encoder provided in the elevating drive device 31 ( Rotation drive detecting means) 123, a drive wheel body fixing device (lifting / circulating mechanism fixing means) 124 capable of fixing the drive wheel body 30, the lifting / lowering body 21 based on the detection values of the lifting / lowering body position detector 122 and the rotation drive detector 123. And a fall prevention control unit (fall prevention control means) 125 for operating the drive wheel fixing device 124 to stop the elevating body 21 and the balance weight 27, and an alarm activated by the fall prevention control unit 125. Device (warning means) 126.
[0039]
The elevating body position detector 122 detects the position of the elevating body 21 by counting the magnetic poles of a magnetic scale 122a provided in the elevating range of the elevating body 21 with a magnetic sensor 122b, for example. The position of the lifting body can be detected without being affected by the extension of the lifting wire 28. As the lifting / lowering circulating mechanism detecting means, for example, any known position detector configuration such as a distance sensor that measures the distance between the lifting / lowering body 21 and a reference position by projecting and receiving pulsed light on a reflector is used. Can be adopted. In addition, the position of the elevating body 21 is detected, but the position of the lifting belt 28A, the lifting wires 28B and 32, and the auxiliary wires 29 of the circulation driving mechanism, the balance weight, and the rotation position of the drive wheel 30 are detected. It may be a device.
[0040]
As shown in FIGS. 2 and 3, the drive wheel body fixing device 124 is disposed adjacent to and above the drive wheel body 30 and has a fixed guide pulley (fixing member) 131 for guiding the lifting wire 28B and a drive. The drive wheel 30 is fixed by engaging a soft locking block (locking member) 132 made of, for example, urethane rubber between the wheel 30 and the support shaft 131 a of the guide pulley 131. A swinging arm 133 movably supported is provided on the side that is upstream in the rotation direction when the lifting / lowering body 32 descends above the drive wheel 30, and a locking block 132 is attached to the free end of the swinging arm 133. And a locking plate 134 provided at a position above the locking block 132 so that the stopper pin 135 can be fitted into and removed from the hole 134a of the locking plate 134. DOO is provided with a (fixed operating portion) 136. 137 is a spring for returning the stopper pin 135.
[0041]
Therefore, the connection shaft and the coupling between the drive wheel body 30 and the output shaft of the elevation drive device (electric motor) 31 are loosened, and the connection portion of the drive wheel body 30 is loosened, or the motor brake built in the elevation drive device 31 is loosened. For example, the position of the lifting body 21 obtained from the detection signal of the lifting body position detector 122 and the position of the lifting body 21 obtained from the detection value of the rotation When it is determined that there is a positional deviation from the position, an operation signal is output to the drive wheel fixing device 124 to operate the solenoid unit 136, and the stopper pin 135 is disengaged from the hole of the latch plate 134. As a result, the swing arm 133 is swung downward by its own weight, the locking block 132 is engaged between the guide pulley 131 and the drive wheel body 30, the drive wheel body 30 is locked, and the components of the elevating and lowering circulation mechanism are formed. The lifting body 21 and the balance weight 27 can be stopped. In this state, since the weight of the elevating body 21 is set to be larger than the balance weight, the elevating body 21 falls. For this reason, the swing arm 133 and the locking block are configured so that the locking block 132 rocks in a direction in which the hanging wire 28B is fed out and the pull-down wire 32 is wound up with respect to the rotation of the drive wheel body 30 on which the pulling wire 32 is wound. 132 are arranged.
[0042]
The operation of the article storage facility will be described.
On the shelf 1, the article 1 is stored in an article storage section 12, and the article 1 is supported on a shelf 13 via a pallet 3. In carrying out the unloading operation, in the transfer device 60, the arm 67 is integrated with the rotary table 63 via the timing belt 64 or the like by the operation of the table driving device 65, as shown by solid lines in FIGS. The arm 67 is rotated around the center 62 so that the free end of the arm body 67 is positioned above the elevating body 21, and the arm driving device 72 operates to integrate the insertion / removal tool 70 with the operating shaft 68 via a transmission mechanism 74 or the like. Is turned to the middle folded state, so that the insertion / removal tool 70 is located on the arm body 67 at a position where it is overlapped.
[0043]
In this state, as shown in FIG. 6, the free end of the insertion / removal tool 70 faces the article storage unit 12 intended by the combined operation of the elevating movement of the elevating body 21 and the lateral movement of the transfer device 60 as described above. Let it. At that time, if necessary, the rotary table 63 is rotated 180 degrees around the longitudinal axis 62 by the operation of the table driving device 65 or the like, and the free end of the insertion / removal tool 70 is moved to the storage portion 12 of any of the shelves 1. To face.
[0044]
Then, first, the arm body 67 is rotated around the longitudinal axis 62 integrally with the rotary table 63 by the table driving device 65, and the free end of the arm body 67 is moved to the target storage section 12 side, The arm driving device 72 rotates the insertion / removal tool 70 integrally with the operating shaft 68, and moves the free end of the insertion / removal tool 70 to the target storage unit 12 side. As a result, the insertion / removal tool 70 is positioned below the shelf 13 supporting the article 1 and directly below the lacking portion 14, as indicated by the imaginary line in FIG.
[0045]
From this state, the elevating body 21 is slightly raised to raise the insertion / removal tool 70 in the lacking portion 14, and is brought into contact with the bottom surface of the pallet body 3 of the article 1 from below to engage the positioning pin 71 on the lower surface side of the pallet body 3. Then, the article 1 is lifted by the loading / unloading tool 70.
[0046]
At this time, the vertical sway regulating member 83 provided on the gantry 80 is rotated and retracted by the regulating member retracting / driving means 84, and when the article 1 is supported on the loading / unloading tool 70, the vertical sway regulating member 83 is controlled. The member 83 is turned substantially upward and projected. The vertical sway regulating member 83 together with the lateral sway regulating member 81 prevents the article 1 from dropping from the loading / unloading tool 70.
[0047]
Thereafter, the arm 67 is rotated by the operation of the table driving device 65, and the insertion / removal tool 70 is rotated by the operation of the arm driving device 72 to be in a folded state, and the insertion / removal tool 70 is returned onto the arm 67.
[0048]
After that, by performing a combination operation of the above-described elevating movement of the elevating body 21 and the lateral movement of the transfer device 60, the free end of the loading / unloading tool 70 is opposed to the cargo handling section 16, and the transfer device 60 is operated as described above. As a result, the article 1 is transferred onto the support member 17 of the handling section 16 and a series of unloading operations is completed.
[0049]
By the way, if an abnormality such as breakage of the lifting belt 28A and the auxiliary wire 29 occurs during the operation or stop, the tension of the lifting belt 28A and the auxiliary wire 29 causes the first safety device 101A, By 101B, the clamping member 108b of the clamp roll 108 is sandwiched between the lifting guide wall 102 and the lifting of the lifting body 21 and the balance weight 27 is stopped in an emergency.
[0050]
Although there is no problem with the tension of the circulating elevating mechanism, the connecting shaft, the coupling, and the connecting portion of the drive wheel 30 may be loosened between the drive wheel 30 and the output shaft of the lift drive device (electric motor) 31. In some cases, the drive wheel 30 becomes free and the elevating body 21 starts to descend due to a failure such as the motor brake built in the elevating drive device 31 not operating. In such a case, the fall prevention control unit 125 detects the position of the lifting / lowering body 21 from the detection signal of the position detector 122 and calculates the position of the lifting / lowering body 21 from the rotation amount of the rotation drive detector 123. And the detection values of the two detectors 122 and 123 are compared. When the detected values deviate from each other, an emergency stop signal is output, the solenoid unit 136 of the drive wheel fixing device 124 is operated, the swing arm 133 is released, and the locking block 132 is moved to the guide pulley 131 and the drive wheel. 30 and bite. As a result, the drive wheel 30 is locked, and the elevating body 21 and the balance weight 27 are stopped.
[0051]
According to the above embodiment, in the second safety device 121, the position of the lifting / lowering body 21 obtained by the lifting / lowering body position detector 122 by the fall prevention control unit 125 and the lifting / lowering drive device 31 by the rotation drive detector 123 are used. By comparing the position of the elevating body 21 based on the amount of rotation, if the two detected values deviate, it is determined that the components of the elevating / circulating mechanism have become loose or broken, and the drive wheel body fixing device is determined. By actuating the lifting and lowering body 21 via the lifting and lowering circulation mechanism, the falling can be prevented. Therefore, although there is no problem with the tension of the lifting / lowering circulation mechanism, etc., the connection shaft between the drive wheel 30 and the output shaft of the lifting / lowering drive device 31, the coupling and the connection portion of the drive wheel 30 are loosened, and the lift / lower drive device 31 is loosened. When the elevating body 21 starts to fall due to a failure such as a failure of the motor brake, the second safety device 121 can securely fix the elevating body 21 and the balance weight 27 via the elevating and circulating mechanism. Can improve the safety of the equipment.
[0052]
In the drive wheel fixing device 124, the locked swing arm 133 is released by the solenoid unit 136, the swing arm 133 is rocked by its own weight, and the locking block 132 is moved to the guide pulley 131 and the drive wheel 30. The drive wheel 30 can be reliably locked with a simple configuration that can be engaged between the lifting device 21 and the lifting / lowering circulating mechanism, and the falling of the lifting / lowering body 21 and the balance weight 27 can be reliably stopped.
[0053]
Further, since the balance weight 27 is interposed between the lifting belt 28A and the lifting wire 28B, the power of the lifting drive device 31 can be greatly reduced, and the manufacturing cost and the operating cost can be reduced. Can be.
[0054]
When the tension of the lifting belt 28A and the lifting wire 28B is reduced, the second safety means 101A and 101B for fixing the lifting of the lifting body 21 and the balance weight 27 are attached to the lifting body 21 and the balance weight 27. And the balance weight 27 are provided, respectively, so that it is possible to prevent a falling accident of the elevating body 21 and the balance weight 27 due to the cutting of the lifting belt 28A, the auxiliary wire 29 and the lifting wire 28B.
[0055]
Note that, in the above-described embodiment, the configuration in which the article 1 includes the container 2 and the pallet body 3 is shown, but the article 1 may be in a form in which the container itself is handled as a load.
[0056]
Further, in the above-described embodiment, the transfer device 60 is of the form with a middle bent arm. However, the transfer apparatus 60 may be of a type in which a fork member moves in and out like a large stacker crane.
[0057]
Further, in the above-described embodiment, the transfer device 60 is provided on the turntable 63, and the transfer device 60 is configured to act on the shelves 10 on both sides. It is also possible to adopt a configuration in which only one of the shelves 10 is actuated, for example.
[0058]
【The invention's effect】
As described above, according to the first aspect of the present invention, the position detection value of the component of the lifting / lowering circulating mechanism obtained by the lifting / lowering circulating mechanism detecting means by the fall prevention means, and the rotation of the lifting / lowering driving device by the rotation driving detecting means. By comparing the amount with the lifting / lowering mechanism, it is possible to detect the descent of the lifting / lowering body in a state where there is no looseness or breakage in the components of the lifting / lowering circulating mechanism, whereby the lifting / lowering circulating mechanism can be fixed by the lifting / lowering circulating mechanism fixing means. . Therefore, it is possible to reliably prevent the falling of the lifting body, which could not be prevented by the conventional fall prevention device for preventing the falling of the lifting body caused by the loosening or breakage of the constituent members of the lifting / lowering circulation mechanism. Safety can be improved.
[0059]
According to the second aspect of the present invention, the failure is notified to the worker by the warning means, and an immediate measure can be taken.
According to the third aspect of the present invention, the driving wheel body can be securely locked with a simple configuration in which the locking member is engaged between the driving wheel body and the fixing member, and the lifting / lowering circulating mechanism can be reliably mounted. Can be stopped.
[0060]
According to the fourth aspect of the present invention, the power of the lifting drive device can be greatly reduced by the balance weight, and the manufacturing cost and the operation cost can be reduced. In addition, the lifting lock means can prevent a falling accident of the lifting body and the balance weight due to the cutting of the lifting rope body from occurring.
[Brief description of the drawings]
FIG. 1 shows an embodiment of an article storage device according to the present invention, and is a configuration diagram of a second safety device.
FIG. 2 is a side view showing a drive wheel body fixing device of the second safety device.
FIGS. 3A and 3B are sectional views of FIG. 2, wherein FIG. 3A is an operation state diagram of the solenoid unit, and FIG. 3B is a release state diagram of the solenoid unit.
FIG. 4 is a front view of the first safety device in a non-operating state.
FIG. 5 is a front view of the first safety device in an operating state showing the same;
FIG. 6 is a partially cutaway perspective view of the article storage device.
FIG. 7 is a side sectional view showing an elevating body of the article storage device.
FIG. 8 is a partial plan view showing an elevating body of the article storage device.
FIG. 9 is a front partial cross-sectional view showing an elevating body of the article storage device.
[Explanation of symbols]
1 articles
10 shelves
12 goods storage
20 Getting in and out means
21 lifting body
25 lifting drive means
27 Balance weight
28A Lifting belt
28B Lifting wire
29 Auxiliary wire
30 Drive wheel
31 lifting drive
32 Pull-down wire
33 Guidewire
34 Guide Wheel
35 Guide roller
36 Hanging case
40 horizontal body
60 Transfer equipment
66 Access mechanism
81 Roll Control
101A, 101B First safety device
121 Second safety device
122 Elevator Position Detector
123 Rotation drive detector
124 Drive wheel fixing device
125 Fall prevention control unit
126 alarm device
131 Guide pulley
132 Hanging block
133 swing arm
134 Hook plate
135 Stopper pin
136 Solenoid unit

Claims (4)

A traveling body movable along the loading / unloading surface of the article storage section of the shelf; In the goods storage facility that was
A lifting rope and a pulling rope connected to the lifting / lowering body, a lifting / lowering driving body around which the lifting rope and the pulling down rope are wound in different directions, and the lifting / lowering driving wheel Lifting drive means having a lifting drive device for driving the body forward and reverse,
The elevating body, a lifting rope, a lifting rope, and an elevating / circulating mechanism detecting unit that detects the movement or rotation of the elevating / circulating mechanism including the elevating drive wheel,
Rotation drive detection means for detecting the amount of rotation of the lifting drive device,
An elevating / circulating mechanism fixing means capable of fixing the elevating drive wheel or the hoisting rope or the pulling rope,
The position of the elevating body based on the detection value of the elevating / circulating mechanism detecting means and the position of the elevating body based on the detection value of the rotation drive detecting means are determined and the elevating / circulating mechanism fixing means is operated to stop the elevating body. A safety device for an article storage facility, comprising a fall prevention means. A safety device for an article storage facility, comprising a warning means activated by a fall prevention means. The circulation mechanism fixing means includes: a locking member that can bite between the driving wheel body and a fixing member disposed adjacent to the driving wheel body; and a fixing operation unit that moves the locking member in the biting direction. The safety device for an article storage facility according to claim 1, wherein the safety device is provided. A weight for balance is interposed in the rope for lifting,
3. The article storage according to claim 1, wherein the lifting body and the weight are provided with lifting lock means for fixing the lifting of the lifting body and the weight when the tension of the lifting rope is reduced. Equipment safety equipment.

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