JPH0741107A - Entry and delivery system with maintenance up/down mover body - Google Patents

Abstract

PURPOSE:To facilitate the fixation of a guide rail means to a support column and enhance the safety level, by disposing a maintenance rise/fall, body guide rail means having a recessed portion along the support column and utilizing this guide rail means both as a rise/fall guiding means and as a maintenance rise/fall body. CONSTITUTION:A guide rail means 60 for guiding a maintenance up/down mover 40 is disposed along a support column 12. A recessed portion 68 open to the other side of the means 60 is formed in this means 60 between a pair of right/left maintenance up/down mover guiding portion 61. Within the recessed portion 68, a clamped portion 64 on which a fall-off prevention means 10 can freely act that is provided with respect to the maintenance up/down mover 40 is formed projecting from the other surface side of the guide rail means 60. Rope-member guiding portions 65 are formed on both sides of the clamped portion 64, and rope members 80 capable of free abutment thereagainst from the other surface side are disposed extending between a lower frame side and an upper support-column end. A maintenance up/down mover raising/lowering means 85 engaging and acting on the rope members 80 is provided on the mover-40 side. Thus, the rope members 80 can be disposed being not exposed, thereby the safety is enhanced, thereby the total length is shortened, and thereby the shock occurring when the system is started and stopped can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading and unloading device for loading and unloading used in, for example, an automated warehouse, and includes a lifting and lowering unit for maintenance including a loading and unloading carriage and a maintenance lifting unit used for maintenance and inspection work. The present invention relates to a body withdrawal device.

[0002]

2. Description of the Related Art Conventionally, as this type, there has been provided a traveling crane with a lifting cab as disclosed in Japanese Patent Laid-Open No. 1-312202. In this conventional configuration, the traveling main body of the traveling crane is configured by a lower frame guided by the lower guide rails, an upper frame guided by the upper guide rails, and a pair of front and rear columns that connect and integrate both frames. In addition, load transfer means is provided on the carriage that moves up and down between both columns.

Then, a pair of left and right guide rails are attached to the outside of the traveling direction on the other column through a bracket,
Elevating cabs that are held on these guide rails so as to be able to move up and down are provided with braking means that can act on both guide rails. To elevate and lower the elevating cab, a motor or speed reducer is provided below the column in the lower frame, and the elevating and lowering is performed over the drive toothed wheel attached to the output shaft and the driven toothed wheel provided on the upper frame. The drive chain is hooked and the lifting drive chain is connected to the lifting cab.

In this conventional structure, the traveling crane is configured to move the traveling main body, to move the carriage up and down, by manually operating the cab on the carriage side or by remote control from the ground side. By a combined operation of moving the transfer means with a fork, loading and unloading of a load can be performed at a desired location on the shelf. The elevating cab is used during an operation, for example, when carrying out an emergency repair work such as a failure of a carriage or a load collapse, or a periodic maintenance work.

That is, after the operator gets on the lifting cab, the motor is operated by the operation through the operation panel provided in the lifting cab, and the lifting drive chain is rotated in the forward and reverse directions. It can be moved up and down along the guide rail. As a result, an operator moves from the lifting cab side to the carriage side while the lifting cab is stopped at a position facing the carriage, thereby performing desired repair work and maintenance inspection work. Further, when the lifting drive chain is broken, the braking means respectively arranged opposite to the guide rails act as a brake to prevent the lifting cab from falling.

[0006]

According to the above-mentioned conventional structure, the lifting drive chain is looped between the motor in the lower frame and the driven toothed wheel of the upper frame, and is attached to the lifting cab. Since the chain part on the connection side of is exposed, another worker on the ground may come into contact with the cab during the inspection operation by raising and lowering the cab, which may cause a dangerous situation.

Further, the total length of the lifting drive chain hanging in a loop is almost twice the length of the support column, so that shocks at the time of starting and stopping the lifting cab are large, and the load (in this case, the operator's weight) is increased. The weight of the lifting cab (including the weight of the lifting cab) greatly extends the chain, and as a result, the lifting cab greatly bounces (uncomfortable shaking in the vertical direction) at the time of starting and stopping the lifting. Further, the lifting drive chain is long, which is disadvantageous in terms of cost. Moreover, since the motor and speed reducer are installed inside the lower frame, maintenance and inspection of these motor and speed reducer cannot be performed easily.

In order to dispose the guide rails on which the braking means acts, it is necessary to fix a plurality of brackets to the support and a work to fix a pair of left and right guide rails between the upper and lower brackets. Due to the large number of fixing points, the work becomes troublesome and the cost becomes high. Moreover, since two braking means are required, the structure becomes complicated.

The object of the present invention is to arrange the lifting ropes so as not to be exposed, and to reduce the shock at the time of starting and stopping, and to raise and lower the lifting device for maintenance lifting bodies. It is an object of the present invention to provide a loading / unloading device with a lifting / lowering body for maintenance, in which the guide rail can be suitably arranged, and the guide rail can be used both for guiding the lifting / lowering of the lifting / lowering body for maintenance and for preventing fall.

[0010]

In order to achieve the above object, the loading / unloading device with a lifting body for maintenance according to the first aspect of the present invention comprises a traveling main body composed of a lower frame and a column standing upright from the lower frame. A carriage that can be raised and lowered is provided on one side of the pillar in the traveling direction of the traveling main body, and a maintenance lifting body that can be raised and lowered is provided on the other side of the pillar to guide the maintenance lifting body along the other side of the pillar. A guide rail is provided, and the guide rail has a pair of left and right maintenance lifting body guide portions formed with a concave groove portion that opens on the other surface side. A clamped portion to which the prevention device can act is formed so as to project to the other surface side, and a rope body guide portion is formed on the side portion of this clamped portion, and the rope body guide portion can be abutted from the other surface side. The rope is on the lower frame side and the upper end of the column Distribution and setting, is provided to the maintenance elevator side the maintenance lifting body lifting movement device which engages acting on the cable body I.

In the loading / unloading device with a lifting body for maintenance according to the second aspect of the present invention, a chain having both ends fixed to the lower frame side and the upper end side of the column is arranged along the other surface side of the column,
The lifting / lowering device for maintenance that engages with the chain is provided with a rotary drive with a brake provided on the side of the vertical lift for maintenance, and a drive tooth wheel linked to the rotary drive with the brake, approaching each other within a set range. A pair of upper and lower idler teeth that can be separated from each other, an elastic biasing member that biases both idler teeth toward each other, and an operation when both idler teeth approach each other by the biasing force of the elastic biaser. And a pair of upper and lower detection devices for winding the chain on the upper idler wheel from one surface side to be engaged, and then to the drive tooth wheel from the other surface side to engage, and then to the lower order. It is wound around and engaged with the idler tooth wheel from one side.

Further, the loading / unloading device with the lifting / lowering body for maintenance according to the third aspect of the present invention is configured so that the fall prevention device provided on the lifting / lowering body for maintenance is operated by the operation of the upper detection device. In addition, the maintenance lifting / lowering device of the fourth aspect of the present invention is configured so that the rotation detection unit with the brake acts as a brake by the operation of the lower detection device.

[0013]

According to the structure of the first aspect of the present invention described above, the loading / unloading device with the lifting / lowering body for maintenance uses a combination of moving the traveling main body by remote control and raising / lowering the carriage to move the shelves. Loads can be loaded and unloaded from the intended storage unit. Then, for example, the maintenance elevator is used when performing an emergency repair work such as a failure on the carriage side or a load collapse, or a periodic maintenance work.

That is, an operator can board the maintenance lift while the maintenance lift is stopped at the lower limit. Then, when the maintenance lifting / lowering device is operated based on the operation in the maintenance lifting / lowering body, the maintenance lifting / lowering body is moved with respect to the ropes linearly arranged along the support pillar in the groove of the guide rail. Since the lifting device engages, the maintenance lifting body can be lifted along the support column and stopped at an arbitrary position such as a position facing the carriage side.

By carrying out transfer of the worker between the maintenance lift and the carriage, desired repair work and maintenance inspection work can be performed. The maintenance elevating body is lowered to the lower limit in the state where the work such as the repair is completed, and the worker finishes a series of work by getting down to the ground.

At this time, the guide rail, including the pair of maintenance elevating / lowering body guide portions and the sandwiched portion, can be easily manufactured from aluminum or the like, and since there is only one sandwiched portion, the fall prevention device is provided. Need only be provided as a set. Further, the maintenance lifting body can be smoothly moved up and down without being shaken by being guided by the pair of maintenance lifting body guide portions. When the rope is broken when the maintenance lift is lifted, the fall prevention device may act on the clamped portion to prevent the maintenance lift from falling.

According to the structure of the second aspect of the invention described above, the chain having the upper end fixed to the upper end side of the support column is wound around and engaged with the drive toothed wheel, so that the portion above the idler toothed wheel at the upper portion is engaged. Suspension tension can be applied to. Then, the suspension tension may cause the upper idler ring to rise against the upper elastic biasing device, and this rise causes the upper detector to detect (or not detect), and in the same way, lower idler to rotate. The lower detection device is also detecting (or not detecting) as the tooth wheel descends. In this way, both detection devices detect (or do not detect)
It is not an emergency while the maintenance elevator is moving normally, and the fall prevention device is not activated.

When the chain is broken, the fall prevention device automatically acts to prevent the maintenance lifting body from falling, and at the same time, the rotation drive section of the maintenance lifting body lifting device acts as a brake. That is, when the chain is broken, the suspension tension is released, and the elastic wheel of the elastic biasing member causes the idler wheel to move closer, causing the detection device to detect (or not detect) operate. . Then, by this operation, the fall prevention device automatically acts to prevent the maintenance lifting body from falling, and at the same time, the maintenance lifting body lifting / lowering device automatically brakes to stop the lifting operation thereafter.

Further, according to the third aspect of the present invention described above, when the chain breaks above the drive toothed wheel, the elastic force of the elastic biasing member causes the upper idle wheel to move downward to detect the upper portion. The device may be operated in a non-sensing motion (or sensing motion), which may actuate the fall arrest device to prevent the maintenance lift from falling.

According to the configuration of the fourth invention described above,
When the chain breaks below the drive tooth ring,
The lower idle wheel moves upward due to the elastic force of the elastic urging device, and the lower detection device operates in a non-detecting (or detecting) motion. After the operation, the lifting operation is stopped and the fall prevention device does not work at this time.

[0021]

An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 5 and 6, the frame-shaped shelf 1 has a plurality of storage portions 2 formed in the vertical direction and the horizontal direction,
Each compartment 2 is configured to support a load 3 (directly or via a pallet) via a brace. A pair of the shelves 1 are arranged side by side with a passage, and in the passage, a loading / unloading device 10 with a lifting body for maintenance which is capable of traveling on a fixed path 4 in front of the shelf 1 is arranged.

The loading / unloading device 10 with the lifting body for maintenance is
A support consisting of a lower frame 11 and a pair of front and rear square pipes (or round pipes) standing upright from the lower frame 11 side.
12 and the upper frame 13 that connects the upper ends of these columns 12
The traveling main body 14 is constituted by and. Then, on the inner surface sides (one surface side in the traveling direction) of the columns 12 facing each other, a carriage 16 is arranged which is guided up and down via guide rollers 15 whose outer surfaces on both sides of the columns 12 are guide surfaces. Further, on the carriage 16, an access device (fork body) 17 that can freely move in and out of the storage part 2 and the like is arranged. The upper frame 13 has a guide device guided by the ceiling rail 5.

A drive wheel 20 which is rollable on the floor-side rail 6 is attached to one end of the lower frame 11, and driven wheels 21 are attached to the other end. Further, a pair of left and right guide wheels 22 guided by the side surfaces of the floor side rail 6 are provided at both ends in a freely rotatable manner. The lower frame 11
The traveling drive unit 25 attached to one end is composed of a speed reducer 26 that interlocks with the drive wheels 20, a traveling drive device (a flanged brake motor, etc.) 27 that interlocks with the speed reducer 26, and the like.

Further, at one end of the lower frame 11, a lifting drive unit 30 interlocking with the carriage 16 is attached. The lifting drive unit 30 is composed of a lifting drive device (motor etc.) 31 and a speed reducer 32.
The drive wheels 33 are interlocked with the output shaft from the speed reducer 32. Two end ropes (ropes, chains, etc.) 34 are hung on this drive wheel 33, and one end side of these ropes 34 is connected to the other through a first guide wheel 35 arranged on the upper frame 13. Into the stanchion 12, and the counterweight in the stanchion 12
It is connected to 36. The other end of the cord 34 is connected to the upper portion of the carriage 16 via a second guide wheel 37 arranged on the upper frame 13.

A power unit 38 for controlling the drive unit 25 for traveling and the drive unit 30 for raising and lowering is provided at one end of the lower frame 11, and the loading and unloading device 10 with a lifting body for maintenance is provided at the other end. A control unit 39 is provided for controlling each operating part of the. Control unit here
39 has its operating surface facing sideways.

5 to 8, a maintenance elevating body 40, which is used at the time of maintenance and inspection or at the time of emergency, is provided on the outer side (the other side surface) of the other column 12 in the traveling direction so as to be vertically movable. That is, the maintenance lifting / lowering body 40 includes a bottom plate 41, a bracket 42 for vertically guided guides standing upright from the front side of the bottom plate 41, a front plate 43 continuously provided above the bracket 42, and a right side of the bottom plate 41. Is installed upright from the surface side and the side edge is the bracket 42 or the front plate.
A side plate 44 integrated with 43, a rear plate 45 which is erected from the rear surface side of the bottom plate 41 and whose side edges are integrated with the side plate 44,
Ceiling board integrated between the upper edges of front plate 43, side plate 44 and rear plate 45
46 and the like form a long box-shaped main body 47 that is long in the vertical direction.

A bayonet portion 50 is formed on one side of the maintenance lifting body 40 in the width direction 14A of the traveling body 14 and in the upper half portion. That is, the maintenance lift 40 has a length in the width direction.
40A is made equal to or slightly longer than the width direction length 12A of the column 12, and the bay window portion 50 is outward in the width direction 14A of the traveling body 14 with respect to the column direction width 12A. It is formed so as to protrude.

Here, the bay window portion 50 has a frame body 51 integral with the side plate 44 of the main body 47, and has an upper inclined support plate 52 toward the outer side of the frame body 51. Frame 51
It is formed by the transparent plate 53 attached to the. Then, in the maintenance lift 40, the operation panel is provided on the inclined support plate 52.
55 is provided, and a grip portion 56 is provided on the bracket 42.

The traveling body width direction 14 of the maintenance lifting body 40
A foldable door body 48 is provided on the other side of A so as to be openable and closable. A maintenance lifting / lowering body side wrap 57 located forward from the other side of the closed door body 48 is continuously provided integrally with the bottom plate 41, and a safety fence is provided on the other side edge of the maintenance lifting / lowering body side wrap 57. 58 are erected. A carriage side trap 18 is continuously provided from the other side of the carriage 16, and a safety fence 19 is provided at the other side edge of the carriage side trap 18 so that the maintenance lifting / lowering body side traps 57 can be opposed to each other at intervals. It is erected. A ladder 29 is provided below the support column 12 between the two traps 18 and 57.

The maintenance lifting body 40 includes the bracket 42.
Via a guide rail 60 attached to the outside of the support column 12 so as to be lifted and lowered. That is, as shown in FIGS. 1 to 5, the guide rail 60 is manufactured in the shape of a mold rail by extrusion molding of aluminum. And a connecting dovetail groove portion 62 that is formed in a shape, and is lined up inside the maintenance elevating / lowering body guide portion 61 and opened to the left and right outward,
A circular arc-shaped cover plate portion 63 is formed on the outside of the maintenance lifting / lowering body guide portion 61 so as to project outward, so that a concave groove portion 68 that opens on the other surface side is formed between both cover plate portions 63. ing.

Further, a rectangular pipe-shaped clamped portion 64 is formed in the concave groove portion 68 and integrally protrudes to the other surface side. Here, the sandwiched portion 64 has a flat sandwiched surface 64a formed on both left and right sides. Also, on both sides of the clamped part 64,
Chain guide part (line guide part) 65 protruding to the other side
Are integrally formed.

The guide rails 60 are fixed between the connecting members 28 attached at a plurality of upper and lower positions on the outer side of the column 12. That is, the connecting member 28 has a gate shape in a plan view, the free ends of both legs thereof are brought into contact with the connecting dovetail groove portions 62 from the outside, and the free ends of the two legs are passed through from the outside.
A nut body 67 in which 66 is positioned in the dovetail groove portion 62 for connection
It is fixed by screwing on.

The maintenance lifting body 40 is attached to the guide rail 60,
It is held so as to be able to move up and down via front-rear regulation rollers 75, left-right regulation rollers 76, etc. arranged on the bracket 42. That is, the bracket 42 has a cross-section gate shape in which the side of the support column 12 is open, and the restriction rollers 75 and 76, which are supported and guided by being fitted and supported by the maintenance elevating / lowering body guide portion 61, are idled at the free ends of both legs thereof. It is attached freely.

A lifting body for maintenance along the guide rail 60
In order to move the 40 up and down, a pair of left and right chains (an example of a rope) 80 is arranged between the lower frame 11 and the upper frame 13, and both ends of the chains 80 are connected to each other by a connecting tool.
The lower frame 11 side and the upper frame 13 side are connected via 81. At this time, the chain 80 can come into contact with the chain guide portion 65 from the other surface side. A maintenance lifting / lowering device 85 for engaging with the chain 80 is provided on the cab 40 side.

That is, a bracket 86 is provided on the lower surface side of the front end of the bottom plate 41 of the main body 47, and the lifting / lowering body lifting / lowering device 85 for maintenance is provided on the bracket 86. This lifting and lowering device 85 for maintenance uses a motor 87 and this motor.
The speed reducer 88 and the brake device 89 which are distributed to the front and rear and are interlocked with the 87, a pair of left and right drive teeth 91 attached to the output shaft 90 of the speed reducer 88, and a pair of left and right wheels in front of these drive teeth 91. It is composed of a pair of upper and lower idler teeth 92, 93 which are provided and can be moved toward and away from each other within a set range. Here, the motor 87 and the brake device 89 are examples of a rotation drive unit with a brake.

The bracket 86 includes a pair of left and right rods.
94 are arranged so as to be able to move up and down via a guide member 95, and the upper ends of both rods 94 are integrated by a bridge plate 96. The upper shaft body 97 is fixed to the upper portions of both rods 94 via pins or the like, and the upper idler gears 92 are attached to these upper shaft bodies 97. An upper compression coil spring (elastic urging tool) 98 that pushes down and urges both rods 94 is provided above the upper shaft body 97, and the upper shaft body 97 that rises against the upper compression coil spring 98 is provided. An upper detection device (limit switch) 99 for detecting is provided.

Further, lower shafts 100 are fitted on the lower parts of both rods 94 so that they can be moved up and down relatively, and lower idler gears 93 are attached to these lower shafts 100. And below the lower shaft body 100,
Compression coil spring that pushes up and urges (elastic urging tool)
101 is provided and this lower compression coil spring 10
A lower detection device (limit switch) 102 for detecting the lower shaft body 100 that has descended against 1 is provided.

The chain 80 is connected to the upper idler wheel.
After being wound and engaged with 92 from one surface side, it is wound with and engaged with the drive toothed wheel 91 from the other surface side, and then with lower idler tooth wheel 93 wound and engaged from one surface side.

On the bracket 42 side of the maintenance lift 40, there is provided a fall prevention device 110 capable of acting on the clamped portion 64. That is, the fall prevention device 110 has two idler teeth 92,
It is provided above 93 and has a box-frame-shaped main body 111 integrated with the bracket 42. A vertical through hole 112 is formed in the main body 111, and the shaft 11 in a state of being erected in connection with the bridge plate 96 is erected in the through hole 112.
3 is inserted from below.

A block 114 is externally fitted and fixed to an intermediate portion of the shaft 113, and a compression coil spring 115 is provided above the block 114 to urge the shaft 113 through the block 114 to urge the shaft 113. . The block 114 has horizontal pins 116 in the left-right direction.

A case body 117 is provided on the main body 111, and the case body 117 is a vertically-oriented rectangular plate-like base portion 11.
8, a pair of left and right arm body portions 119 continuously provided from the base portion 118 to the sandwiched portion 64 side, and a pad receiving portion 120 fixed to the free ends of these arm body portions 119. These pad receiving parts
120 has a step portion 121 that is open to the opposite side and the outside,
The surfaces of the two step portions 121 facing each other are formed as inclined guide surfaces 121a that are closer to each other toward the upper side.

A lid 122 for closing the outer opening of the step 121 is provided, and the lid 122 is fixed to the pad receiving portion 120 via a bolt 123. The pad 124 disposed in the step portion 121 has a wedge shape, and its inclined surface portion is used as the inclined guide surface 124a, and the inclined guide surface 121a of the step portion 121.
And the surfaces that face each other in parallel are formed as flat holding surfaces 124b.

A pair of left and right links 126 is vertically swingably mounted between the arm body portions 119 of the case body 117 via a horizontal support shaft 125. The center of each of these links 126 is attached to the support shaft 125, and the inner end thereof is connected to the horizontal pin 116 of the block 114 so as to be relatively swingable. The outer ends of both links 126 are connected to the lower portion of the pad 124 via left and right pins 127 so as to be relatively swingable.

Then, as described above, by winding the chain 80 around the upper rotating toothed wheel 92, the rod 94 rises up against the upper compression coil spring 98, which causes the passing plate 96 to move.
The shaft 113 is urged upward against the compression coil spring 115. Further, as the shaft 113 rises, the pad 124 is moved downward via the link 126, etc., and thus 94 to 98, 100, 101, 113 to 116, 125 to
By means of 127 or the like, an interlocking means for moving both pads 124 away from each other against the elastic biasing force while the chain 80 is being subjected to suspension tension is constituted.

In the above-mentioned embodiment, the loading / unloading device 10 with the lifting / lowering body for maintenance uses the driving unit 25 for driving to move the traveling main body 14 in accordance with an operation command via the control unit 39, and The drive unit 30 is operated to move the carriage 16 up and down, and the loading / unloading tool 17 is forked to perform a combined operation, thereby loading / unloading the load 3 into / from the intended storage section 2 of the shelf 1. You can do it.

During such an intended operation, the maintenance lifting / lowering body 40 is stopped at the lower limit of its proximity to the lower frame 11. Therefore, when the worker needs to walk in the fixed path 4 when the operation is stopped, on one side of the loading / unloading device 10 with the lifting / lowering body for maintenance 10, the maintenance lifting / lowering body 40 may be disturbed by passing under the bay window 50. On the other side of the loading / unloading device with maintenance lifting / lowering body 10, walking on the maintenance lifting / lowering side ramp 57 allows the maintenance lifting / lowering body 40 to pass without being disturbed.

The maintenance lift 40 is used when carrying out an emergency repair work such as a failure on the side of the carriage 16 or a load collapse, or a periodic maintenance work. That is, with respect to the maintenance lift 40 that is stopped at the descending limit close to the lower frame 11, the worker on the ground side uses the ladder 29 to move up to the maintenance lift tarp 57, and the maintenance lift trap The door 48 is opened from 57 to board, and the boarded operator operates the operation panel 55.

At this time, the operator in the lifting / lowering body 40 for maintenance positions the upper half of the body in the bay window portion 50, so that the operator can move forward and backward without being disturbed by the columns 12 through the transparent plate 53. While looking at the side, the operation panel 55 provided in the lower part of the bay window 50 is used. When the worker has an unstable posture, for example, the operator can operate the operation panel 55 with the right hand while holding the grip portion 56 with the left hand.

In this way, the operator operates the operation panel 55, and in response to an operation command via the control unit 39,
The motor 87 of the maintenance lifting and lowering device 85 can be rotated in the forward and reverse directions, and the drive toothed wheel 91 can be rotated in the forward and reverse directions via the reduction gear 88 and the output shaft 90. Therefore, the drive toothed wheel 91, which is constantly meshed with the chain 80 linearly (rack-shaped) arranged between the upper and lower frames 13 and 11, is forced to rotate, thereby guiding the maintenance lift 40. It can be raised along rail 60. Then, for example, when carrying out repair work for a load collapse, the maintenance lift 40 can be stopped facing the carriage 16. At this time, the maintenance lifting / lowering body side wraps 57 face the carriage side wraps 18 at the same level.

The lifting tension acts on the chain 80 when the maintenance lift 40 is raised and lowered. That is, the chain 80 whose upper end is fixed to the upper frame 13 by the connecting tool 81.
By being wound around and engaged with the drive toothed wheel 91, the suspension tension acts on the portion above the upper idler toothed wheel 92. Then, due to the suspension tension, the rod 94 is lifted up against the upper compression coil spring 98 via the upper idler ring 92 and the upper shaft body 97.

As a result, the shaft 113 is raised against the compression coil spring 115 via the bridge plate 96. Further, the block 114 integral with the shaft 113 is raised against the compression coil spring 115, whereby the link 126 swings around the support shaft 125 to lower the pad 124. As the pad 124 descends, the wedge is pulled out, so that the sandwiching surface 124b becomes the sandwiched surface 64a.
As a result, the fall prevention device 110 becomes inoperative. In addition, both the regulation rollers 75,
The guidance of 76 prevents the shake. As a result, the lifting / lowering body 40 for maintenance can be smoothly lifted / lowered without any trouble.

Both upper detection devices 99 are activated (turned on) by the ascent of the upper shaft body 97, and the lower shaft body 100 is similarly moved.
Both lower detectors 102 are also activated when the
is doing. In this way, it is not an emergency when the detection devices 99 and 102 are detecting and moving, and thus the maintenance lifting / lowering device lifting / lowering device 85 operates normally and the fall prevention device 110 does not operate.

After the lifting of the maintenance lift 40 is stopped and the brake device 89 is actuated as described above, the operator first opens the door body 48 and then the maintenance lift ramp 57.
Go up. Then, the worker can move from the maintenance lifting / lowering side ramp 57 to the carriage side ramp 18 by being protected by the safety fences 19/58 and gripping the safety fences 19/58, thereby performing the desired repair work and maintenance. Can perform inspection work. After performing the desired work in this way, the worker
57 can be used to return from the carriage 16 to the maintenance lift 40. Then, the maintenance lift 40 is lowered to the lower limit, and the worker uses the ladder 29 to descend to the ground side, thereby completing a series of work using the maintenance lift 40.

When one of the two chains 80 is broken or stretched when the maintenance lift 40 is raised or lowered, the brake device 89 of the maintenance lift elevator 85 operates. That is, the suspension tension acting on the idler teeth 92, 93 wound around the corresponding chain 80 is released, and the elastic forces of the compression coil springs 98, 101 cause the shafts 97, 100 to move. After moving, one of the detection devices 99 and 102 becomes non-detection (off). As a result, the brake device 89 of the maintenance lifting / lowering device 85 automatically operates to stop the subsequent lifting / lowering operation and inform the operator of this emergency.

Further, when the maintenance lifting / lowering body 40 is lifted / lowered, the driving tooth wheel is
When both chains 80 are broken above 91,
At the same time as the above-described braking action, the fall prevention device 110 automatically acts, thereby preventing the maintenance lift 40 from falling. That is, when the chain 80 is broken, the suspension tension acting on the upper free wheel 92 is released, so that the elastic force of both the compression coil springs 98 and 115 causes the rod 94 and the bridge plate 96. , Shaft 113, block 11
4 and the like will descend relative to the main body 111. As a result, the link 126 swings around the support shaft 125 (arrow A in FIG. 7) to raise the pad 124 (arrow B in FIG. 6).

Then, as the pad 124 rises, the inclined guide surface 121a is guided by the inclined guide surface 121a to drive the wedge, and therefore the holding surface 124b approaches the held portion 64 and the flat surfaces are pressed against each other. Become a fall prevention device
110 works. This prevents the maintenance lift 40 from falling due to the breakage of the chain 80 described above.

When both chains 80 are broken below the drive toothed wheel 91, only the both lower detection devices 102 become non-detected, and as described above, only the brake device 89 automatically operates. The lifting and lowering action of the device is stopped, the operator is informed of this emergency, and the fall prevention device 110 does not work.

In the above embodiment, the chain 80 is shown as an example of the rope, but in the first invention, it may be a wire or the like. As shown in the above embodiment, by disposing the maintenance lifting / lowering device lifting / lowering device 85 so as to project from the lower surface of the maintenance lifting / lowering member 40 to the outside (downward), maintenance and inspection of the maintenance lifting / lowering device lifting / lowering device 85 can be performed. The maintenance lifting body 40 can be stopped by stopping the maintenance lifting body lifting / lowering device 85 at the lower limit where the maintenance lifting / lowering device 85 is brought close to the upper surface of the lower frame 11. It should be noted that the lifting device 85 arranged in a protruding manner to the outside may be provided with an openable / closable or removable cover as necessary.

In the fall prevention device 100 of the above-described embodiment, the flat holding surface 66a is brought into contact with the flat holding surface 122b of the pad 122 to prevent the fall. In addition, it may be a fall prevention device that applies a cam-like braking body.

In the above embodiment, the lifting body 40 for maintenance and the support
Although the fall prevention device 100 is provided between the support 12 and the fall prevention device 12, the fall prevention device 100 may be provided between the support 12 and the carriage 16.

[0061]

According to the first aspect of the present invention having the above-described structure, the one guide rail can form the elevating and lowering guide portion of the maintenance elevating body and the acting portion of the fall prevention device, and the arrangement (fixing) to the column side. Can be done easily and easily,
The guide rail can be easily made of aluminum,
The whole can be provided at low cost. Since it is sufficient to provide one set of the fall prevention device so as to face one sandwiched portion, the structure can be simplified.

Further, the rope can be arranged without being exposed in the concave groove portion of the guide rail, and the safety can be improved. And the total length of the rope (chain etc.) can be made as short as the length of the column, and shock when starting and stopping the lifting body for maintenance and the amount of extension due to load can be reduced, and when starting and stopping the lifting In this case, it is possible to reduce the bouncing of the maintenance lifting body, and the length of the rope is short, which is advantageous in terms of cost.

Further, according to the second aspect of the present invention having the above-mentioned structure, when the chain is broken when the maintenance lifting body is moved up and down, the detection device operates in a detection motion (or non-detection motion), whereby the fall prevention device is automatically operated. It is possible to prevent the maintenance lifting body from falling, and at the same time, the rotation driving unit of the maintenance lifting body moving device is automatically braked to stop the subsequent lifting operation.

Further, according to the third aspect of the present invention having the above-mentioned structure, when the chain breaks above the drive tooth ring, the fall prevention device is automatically actuated to prevent the maintenance lifting body from falling, and the drive tooth ring is It is possible to prevent malfunction of the fall prevention device due to elongation of the chain in the lower part.

Further, according to the fourth aspect of the present invention having the above-mentioned structure, when the chain is broken below the drive tooth ring, the maintenance lifting / lowering device lifting / lowering device can automatically brake to stop the lifting / lowering operation thereafter. At this time, since the fall prevention device does not operate, repair and restart can be performed quickly.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a lift guide according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the lifting guide.

FIG. 3 is a partially cutaway front view of a lifting guide of the loading / unloading device with a lifting body for maintenance.

FIG. 4 is a perspective view of a guide rail for the maintenance elevator.

FIG. 5 is a partially cutaway side view of an automated warehouse using the same loading / unloading device with a lifting body for maintenance.

FIG. 6 is a partially cutaway front view of an automatic warehouse using the same loading / unloading device with a lifting body for maintenance.

FIG. 7 is a horizontal cross-sectional plan view of a maintenance lifting / lowering body portion of the same loading / unloading device with maintenance lifting / lowering body.

FIG. 8 is a front view of a maintenance lifting / lowering body portion of the same loading / unloading device with maintenance lifting / lowering body.

[Explanation of symbols]

 1 shelf 4 fixed path 10 loading / unloading device with lifting body for maintenance 11 lower frame 12 column 13 upper frame 14 traveling body 16 carriage 17 loading / unloading device 25 driving unit for traveling 30 driving unit for lifting 38 power unit 39 control unit 40 lifting unit for maintenance 60 Guide rail 61 Elevating body guide for maintenance 63 Cover plate 64 Clamping part 64a Clamping surface 65 Chain guide part (rope guide part) 68 Recessed groove part 80 Chain (rope body) 85 Lifting device for maintenance 87 Motor (rotary drive part) 89 Brake device (rotary drive part) 91 Drive tooth ring 92 Idling tooth ring 93 Idling tooth ring 94 Rod 95 Guide member 97 Upper shaft body 98 Upper compression coil spring (elastic biasing device) 99 Upper part Detection device 100 Lower shaft 101 Lower compression coil spring (elastic biasing device) 102 Lower detection device 110 Fall prevention device 124 Pad 124b Holding surface

Claims (4)

[Claims] 1. A traveling main body is composed of a lower frame and a support erected from the lower frame, and a carriage that can be raised and lowered is provided on one side of the support in the traveling direction of the traveling main body, and on the other side. An elevating and lowering body for maintenance is provided, and a guide rail for guiding the elevating and lowering body for maintenance is arranged along the other surface side of the pillar. This guide rail is provided between a pair of left and right maintenance elevating body guide portions. A concave groove portion that opens on the surface side is formed, and a clamped portion to which the fall prevention device provided on the maintenance lifting body is operable is formed to project to the other surface side in the concave groove portion. A cord guide portion is formed on the side of the cord, and a cord body that can freely come into contact with the cord guide portion from the other surface side is arranged between the lower frame side and the upper end side of the column, and the cord body is engaged with the cord body. A lifting device for maintenance is used on the side of the lifting device for maintenance. A loading and unloading device with a lifting body for maintenance. 2. A traveling main body is constituted by a lower frame and a pillar standing upright from the lower frame, and a carriage that can be raised and lowered is provided on one surface side of the pillar in the traveling direction of the traveling main body, and on the other surface side. A maintenance elevating body that can be raised and lowered is provided, and a chain whose both ends are fixed to the lower frame side and the upper end side of the strut is arranged along the other surface side of the strut, and the maintenance elevating and lowering unit that engages with this chain The body lifting device includes a rotary drive unit with a brake provided on the side of the maintenance lift unit, a drive toothed wheel that is linked to the rotary drive unit with the brake, and a pair of upper and lower idlers that are provided so that they can move toward and away from each other within a set range. The toothed wheel, an elastic biasing member that biases both idler tooth wheels toward each other, and a pair of upper and lower detection devices that operate when both idler tooth wheels move toward each other by the biasing force of the elastically biasing members. , The chain is idle It is characterized in that it is wound on the toothed wheel from one side to be engaged, then wound on the drive toothed wheel from the other side to be engaged, and then wound on the lower idler toothed wheel from one side to be engaged. A loading / unloading device with a lifting body for maintenance. 3. The loading / unloading device with a lifting / lowering body for maintenance according to claim 2, wherein a drop prevention device provided on the lifting / lowering body for maintenance is operated by the operation of the upper detection device. 4. The loading / unloading device with a lifting / lowering body for maintenance according to claim 2, wherein the rotation drive unit with a brake is configured to act as a brake by the operation of the lower detection device.