JPH07285614A - Taking in and out device with falling preventing device - Google Patents

Abstract

PURPOSE:To provide a taking in and out device with falling preventing device in which a receiving rail for working a falling preventing device onto a strut is dispensed with, and the nipping work from lateral sides can be independently performed. CONSTITUTION:The raising and lowering movement of a carriage 16 can be performed without laterally shaking by winding or delivering a rope 32 by a lifting driving device, thereby guiding a guide roll 23 by the guide surface 14a of a strut 14. A falling preventing device 40 is situated in non-working position, and the carriage 16 can be lifted without hindrance. When the rope 32 is cut during suspending work, and the suspending force is released, the falling preventing device 40 acts on both the guide surfaces 14a of the strut 14 from both sides, and the carriage 16 is integrated to the strut 14 side to prevent the falling.

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 used when, for example, an automated warehouse transfers a load between a shelf and a loading / unloading area.

[0002]

2. Description of the Related Art Conventionally, as this type of loading / unloading device,
For example, a loading / unloading device with a fall prevention device as disclosed in Japanese Patent Laid-Open No. 4-217600 is provided. This conventional configuration is a traveling machine body in which a pair of front and rear columns are erected, a lift table guided by both columns, a loading / unloading tool provided on the lift table, and an elevator drive device using a chain linked to the elevator table. And both columns are formed from a square pipe body. A receiving rail is provided along the entire length of the support column in the height direction so that the fall prevention device provided on the lift table can be operated. This receiving rail is fixed to the support side by externally fitting bolt holes formed at a plurality of upper and lower portions of the receiving rail to a bolt protruding from the support by welding and then screwing a nut into the bolt. .

The fall prevention device has a pair of left and right rotating shafts in the front-rear direction, and a holding piece that is movable on the receiving rail by left and right swing and an intermediate portion of the operating link at the outer ends of these rotating shafts. Are fixed, and the inner ends of these operating links are connected by a center link. A compression spring for urging the holding piece in the holding direction is interposed between the push rod connected to the center bending pin of the center bending link and the lifting table side. A flange is connected to the lower end of the lifting rod that can be raised and lowered within a certain range, and the upper end of this flange and the outer ends of both operating links are connected via links, respectively, and the free end of the chain is attached to the upper end of the lifting rod. It is connected.

According to this conventional structure, the hanging force of the chain is exerted on the lifting table side by the flange attached to the lower end of the lifting rod contacting the lifting table side. At this time, both links are pulled up, the rotary shaft is rotated against the compression spring so that the outer end of the operating link rises, and the clamping pieces are separated from the rails, so that the lifting platform can be raised and lowered without any trouble. It

When the chain is cut during the suspending operation and the suspending force is released, the repulsive force of the compression spring pulls up the inner end of the working link via the center-folding link and the self-weight lowering of the lifting rod and the link. The force that pushes down the outer end of the actuating link acts on the rotating shaft. As a result, the sandwiching piece is forcibly rotated via the rotating shaft, and the cam surface of the sandwiching piece is wedged into the rail. So the lift is
Since the receiving rail is strongly sandwiched by the pair of sandwiching pieces, it is integrated with the supporting column side and is prevented from falling.

[0006]

According to the above-mentioned conventional type, the weight of the traveling machine body is increased because the receiving rails to which the fall prevention device can freely operate are arranged along the entire length of the support column in the height direction. However, the material cost and the fixed work cost increase the cost. Further, both the sandwiching pieces are rotated by the same amount at the same time by a set of a link mechanism composed of a center-folded link and a link, and therefore, centering work is required to apply the same amount in synchronization, As a result, the assembly efficiency is reduced.

An object of the present invention is to provide a drop-prevention device withdrawal device that does not require a receiving rail for actuating a fall prevention device on a column and can perform a sandwiching action from the left and right separately. is there.

[0008]

In order to achieve the above object, a loading / unloading device with a fall prevention device according to the first aspect of the present invention is provided with a traveling machine body having a pair of front and rear columns, and is vertically movable between the columns. A carriage, a loading / unloading tool provided on the carriage, and a lifting / lowering drive device using a rope body provided on the traveling body side in association with the carriage are provided, and the strut is formed to have a rectangular cross section. The left and right side surfaces are formed on guide surfaces which guide rollers of the carriage can freely oppose to each other, and a fall prevention device which acts on both guide surfaces when the lifting force of the rope is released is provided between the rope and the carriage. It is provided in.

A second aspect of the present invention is the above-described loading / unloading device with a fall prevention device according to the first aspect of the invention, wherein the fall prevention device has a pair of right and left sandwiching members that can act independently on both guide surfaces. .

The third aspect of the present invention is the loading / unloading device with the fall prevention device according to the second aspect of the present invention, wherein the fall prevention device has an elevating rod that is lowered by an elastic biasing force when the suspension force of the rope is released. However, a pair of left and right transmission mechanisms are provided for individually transmitting the lowering of the lifting rod to the holding member.

[0011]

According to the structure of the first aspect of the present invention described above, the loading / unloading device includes the traveling motion of the traveling machine body, the raising and lowering motion of the carriage,
By the combined operation with the operation of the loading / unloading tool, the load can be delivered via the loading / unloading tool. At that time, the raising and lowering of the carriage is performed by winding up or unwinding the rope by the raising and lowering device so that the guide roller is guided by the guide surface of the column and does not swing to the left or right. The fall arrest device is then in its inactive position, so that the carriage can be raised and lowered without any hindrance. When the rope is cut during the suspending action and the suspending force by this rope is released, the fall prevention device acts on both guide surfaces of the column from both sides, thus integrating the carriage with the column side. To prevent the fall.

Further, according to the structure of the second aspect of the present invention, when the lifting force is released by cutting the rope, the two clamping members are caused to act on both guide surfaces of the column separately to integrate the carriage on the column side. obtain.

According to the structure of the third aspect of the present invention, the lifting force can be applied to the lower surface side of the carriage through the lifting rod.
Further, both clamping members are in the non-acting position via the respective transmission mechanisms, and therefore the carriage can be raised and lowered without any trouble. When the hanging force is released by cutting the rope, the lifting rod is lowered by the elastic biasing force to move the two holding members separately to the operating position through the respective transmission mechanisms. Since the guide surfaces are separately clamped, the carriage can be integrated with the support side.

[0014]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 6 and FIG. 7, 1 is a shelf that is arranged in parallel with a passage 2 provided therein, and a plurality of storage spaces 3 are formed in the vertical and horizontal directions. Reference numeral 10 is a loading / unloading device disposed in the passage 2, and its traveling body 11 is a lower frame 13 supported and guided by the floor-side rail 5 via wheels 12.
And a pair of front and rear columns upright from this lower frame 13
14 and an upper frame 15 that connects the upper ends of these columns 14 and is guided to the ceiling side rail 6 via rollers or the like.

On the carriage 16 which is arranged between the columns 14 so as to be able to move up and down, a loading / unloading tool (fork) 17 which is capable of moving in and out in the lateral direction is provided, and the lower frame 13 is interlocked with the carriage 16. Elevating and lowering drive device 18 using the rope and wheels 6
And a traveling drive device 19 interlocked with. 20 indicates a control panel.

1 to 5, each of the columns 14 has a rectangular shape (rectangular tubular shape), both left and right side surfaces thereof are formed as side guide surfaces 14a, and the opposing surfaces of both columns 14 are front and rear. It is formed on the part guide surface 14b.

The carriage 16 is composed of a base frame 21 on which the loading / unloading tool 17 is arranged, and side frames 22 erected from the front and rear ends of the base frame 21. On the guide surface 14a, a guide roller 23, which can freely oppose, is attached so as to be free from rolling. Where each side frame 22
In the guide roller 23, two pairs of upper and lower are arranged, with one pair of left and right as one set. Further, a pair of upper and lower guide rollers 24 provided on the side frame 22 for preventing forward and backward swinging are configured to act on the front and rear guide surfaces 14b.

The elevating / lowering drive device 18 has a drum 31 which is interlocked with a motor 30, and two first chains (an example of a rope) 32 wound around the drum 31 are lower chains. It is passed through one of the columns 14 through a ring 33, and is distributed to the front and back by an upper chain ring 34, and then interlocked with a fall prevention device 40 provided on both side frames 22. Further, the second chain 35, which is a set of two wound around the drum 31 in the opposite direction, is distributed to the front and rear by the lower guide chain wheel 36 and then interlocked with the base frame 21.

The fall prevention device 40 has an elevating rod 42 which is penetrated by a horizontal member 41 which is integral with the side frame 22, and an inverted triangular bracket on the upper part of the elevating rod 42 with a longitudinal pin 43. 44 is swingably connected to the left and right. A pair of free ends of the first chain 32 are connected to the upper corners of the bracket 44 by connecting pins 45, etc., which are distributed to the left and right.

A cylindrical body 46 which can freely come into contact with the lower surface of the horizontal member 41.
Is provided, the receiving plate 47 integrated with the lower edge of the tubular body 46 is externally fitted to the lower portion of the lifting rod 42 that is inserted into the tubular body 46, and is formed at the lower end of the elevator rod 42. A nut body 49 is screwed into the screw portion 42a. A compression spring 50 that is fitted inside the tubular body 46 and fitted outside the lifting rod 42 is disposed between the lower surface of the horizontal member 41 and the upper surface of the receiving plate 47. As a result, when the suspending force acts on the first chain 32, the compression spring 50 is compressed to bring the cylindrical body 46 into contact with the lower surface of the horizontal member 41, and the suspending force of the first chain 32 is released. When
The elastic force of the compression spring 50 separates the tubular body 46 from the lower surface of the horizontal member 41.

From the cylindrical body 46, a connecting pin 48 in the front-rear direction is provided.
Holding brackets 51 are continuously provided on both left and right sides via a shaft, and a shaft 52 is vertically provided from free ends of the holding brackets 51. These shafts 52 are vertically guided by a pair of upper and lower guide plates 53 provided on the side frame 22, and are lowered by a compression spring 55 provided between a washer 54 attached to the lower end and a lower guide plate 53. It is energized. A connection block 56 is attached to the middle portion of the shaft 52 so that the attachment position is adjustable.

Left and right direction pins 58 are arranged on holding frame bodies 57 attached to both sides of the side frame 22.
The base end of the swing link 59, whose middle part is pivotally supported by 58, is
It is connected to the connecting block 56 through the long hole 61. A fixed block 62 is attached to the holding frame 57, and a fixed cam surface 63 facing the side guide surface 14a of the column 14 at a distance is inclined to the fixed block 62 so that the lower side is separated from the fixed cam surface 63. Is formed.

A movable block 64 is disposed between the fixed block 62 and the column 14, and the movable block 64 has a movable cam surface 65 slidably contactable with the fixed cam surface 63 and a pin. It is connected to the free end of the swing link 59 via 66 and a long hole 67. The surface on the opposite side of the movable block 64 is a pressing surface that can come into surface contact with the side guide surface 14a.
Formed in 68.

Here, the movable blocks 64 serve as an example of a pair of left and right sandwiching members that can act on the guide surfaces 14a on both sides independently of each other, and further, the cylinder 46, the holding bracket 51, and the shaft.
52, connecting block 56, swing link 59, etc.
A pair of left and right transmission mechanisms for individually transmitting the downward movement of 42 to both movable blocks 64 is configured.

An operating portion 69 is integrally provided on one side of the bracket 44. The operating portion 69 is a limit switch (detector) provided on the lifting rod 42 side when both first chains 32 are normal. Detected by touching 70, and also the first chain
When one of the 32 is extended, the bracket 44 swings around the pin 43 in the front-rear direction, so that the limit switch 70
Is separated from and is not detected.

Next, the operation of the above embodiment will be described. The loading / unloading device 10 includes a carriage 16 and a carriage 16 in the passage 2.
The load 75 is delivered to and from the intended storage space 3 via the loading / unloading tool 17 by a combined operation of the up / down movement and the lateral movement of the loading / unloading tool 17.

The carriage 16 can be moved up and down by rotating the drum 31 in the forward and reverse directions by the motor 30 and winding or unwinding the first chain 32. At that time, since the guide roller 23 is guided by the side guide surface 14a, there is no left-right sway in the ascending / descending operation.
It will be held in a state where there is no swaying back and forth.

The suspension force is applied to the side of the carriage 16 by the cylinder 46 attached to the lower end of the lifting rod 42 contacting the lower surface of the horizontal member 41. At this time, since the tubular body 46 is in the upper limit, the connecting block 56 is pulled up via the holding bracket 51 and the shaft 52, and the swinging link 59 resists the compression spring 55 so that the free end of the swinging link 59 descends. It is swung around the horizontal pin 58. As a result, the movable block 64 is lowered and the pressing surface 68 is separated from the side guide surface 14a, so that the carriage 16 can be raised and lowered without any trouble.

During normal lifting and lowering, since both first chains 32 are normal (equal tension) as shown in FIG. 1, the bracket 44 has both connecting pins 45 positioned at the same level. It is in a broken state. Thus the bracket 44
The operation unit 69 integrated with the unit is detected by contacting the limit switch 70, and can be confirmed by a control panel (not shown) on the ground side.

When one of the first chains 32 is stretched or cut due to the progress of use, the bracket 44 is moved forward and backward as shown by the solid line and phantom line in FIG.
The operating portion 69 is oscillated around 43 and is separated from the limit switch 70 and is not detected. This state is alarmed (sound, lighting, etc.) by the control panel on the ground side, and after confirmation, tension adjustment and repair are performed. Also, the operation unit 69 is a mitt switch.
The action detected or not detected by 70 is also used for tension adjustment of both first chains 32 at the time of assembly work.

When both the first chains 32 are cut during the hanging operation, the hanging force by the first chains 32 is released. Then, the elevating rod 42 is lowered by the elastic force of the compression spring 50, and the tubular body 46 is lowered, so that the connecting block 56 is lowered via the holding bracket 51 and the shaft 52. At that time, the elastic force of the compression spring 55 promotes the lowering of the shaft 52.

By lowering the connecting block 56 as described above,
The swing link 59 is swung around the horizontal pin 58 so that the free end of the swing link 59 is raised, whereby the movable block 64 is raised. Then, the movable cam surface 65 is
Are slidably contacted with each other and are pressed against the side guide surface 14a.
Are approached and abutted, so that the movable block 64 is wedged between the fixed block 62 and the column 14. Therefore, the carriage 16 is integrated with the support column 8 side and is prevented from falling.

In the above embodiment, the wedge type movable block 64 is shown as the holding member, but it may be a rotary type holding piece. Further, the transmission mechanism may employ various types other than the types shown in the above-mentioned embodiments.

[0034]

According to the first aspect of the present invention having the above-described structure, by directly acting the fall prevention device on the guide surface of the support column, the support column does not need a receiving rail for operating the fall prevention device. Therefore, the weight of the traveling machine body and the cost can be reduced.

Further, according to the second aspect of the present invention having the above-mentioned structure, the pair of holding members in the drop prevention device can act on the guide surfaces separately, so that, for example, the centering work for applying the same amount in synchronization is performed. Can be eliminated, and the assembly efficiency can be improved.

Further, according to the third aspect of the present invention having the above-described structure, when the lifting force of the rope is released, different actions can be quickly and reliably performed on both guide surfaces of the pair of holding members.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a portion of a fall prevention device in a dropout device with a fall prevention device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of a portion of the fall prevention device in the loading / unloading device with the fall prevention device.

FIG. 3 is a plan view of a portion of the fall prevention device in the same device with the fall prevention device.

FIG. 4 is a cross-sectional plan view of a portion of the fall prevention device in the loading / unloading device with the fall prevention device.

FIG. 5 is a front view of a main part of a fall prevention device portion of the same loading / unloading device with a fall prevention device.

FIG. 6 is a side view of a loading / unloading device portion in the loading / unloading device with the fall prevention device.

FIG. 7 is a front view of an automated warehouse that employs the drop-in / out device with the fall prevention device.

[Explanation of symbols]

 1 shelf 3 storage space 10 loading / unloading device 11 traveling machine body 14 post 14a side guide surface 16 carriage 17 loading / unloading device 18 lifting drive device 19 running drive device 23 guide roller 32 first chain (rope) 40 fall prevention device 42 lifting rod 44 Bracket 46 Cylindrical body 47 Receiving plate 50 Compression spring 51 Holding bracket 52 Shaft 55 Compression spring 56 Connecting block 59 Swing link 62 Fixed block 63 Fixed cam surface 64 Movable block (clamping member) 65 Movable cam surface 68 Pressing surface

Claims (3)

[Claims] 1. A traveling machine body having a pair of front and rear columns, a carriage that is vertically movable between the columns, a loading / unloading tool provided on the carriage, and a carriage body side provided in association with the carriage. And a lifting drive device using a rope, the columns are formed to have a rectangular cross-section, and the left and right side surfaces of the columns are formed as guide surfaces which guide rollers of the carriage can face each other to suspend the rope. A fall prevention device with a fall prevention device, characterized in that a fall prevention device that can act on both guide surfaces when the force is released is provided between the rope and the carriage. 2. The drop-in / out device with the fall-prevention device according to claim 1, wherein the fall-prevention device has a pair of right and left holding members that can act independently on both guide surfaces. 3. The fall prevention device has an elevating rod that is lowered by an elastic biasing force when the lifting force of the rope is released, and a pair of left and right transmission mechanisms that individually convey the lowering of the elevating rod to the holding member. The loading / unloading device with a fall prevention device according to claim 2, wherein: