JPH04217600A - Delivery system with falling preventer - Google Patents

Abstract

PURPOSE:To prevent any deformation from occurring by installing a bolt projectingly from an outer surface of a support consisting of a rectangular pipe body by means of welding, and locking a receiving rail on which a falling preventer at the side of a ramp will act, in an automatic warehousing delivery system. CONSTITUTION:A support 8 erected from a traveling machine body, consisting in a rectangular pipe body, sets the opposed inner surface down to a rail fixed surface 8a, while using symmetrical sides for guide surfaces 8b. A receiving rail 17, where a falling preventer 40 installed in a ramp is free of scting on, its attached onto the rail fixed surface 8a extending over the full length of height. This receiving rail 17 is made up into an L-shaped form with a fixed part 17A and a receiving part 17B, while plural bolt holes 18 are made on this fixed part 17A, inserting each in a bolt 20 welded to the rail fixed surface 8a, and clamped by a nut 21. Thus, the promotion of lightweightiness of the support and prevention of the occurrence of any deformation are all well achievable.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading/unloading device equipped with a fall prevention device, which is used, for example, in an automated warehouse when transferring loads between a shelf and a handling area.

0002

2. Description of the Related Art Conventionally, this type of apparatus has been provided, for example, in the configuration disclosed in Japanese Patent Application Laid-open No. 160911/1983. This conventional example has a traveling body with a pair of front and rear columns erected, an elevator platform guided by both columns, and a loading/unloading tool provided on the platform so as to be able to move in and out in the lateral direction. It is formed from a square pipe body.

[0003] On the left and right sides of the pillar of the square pipe body,
The guide rollers of the elevating table form a guide surface that can be opposed to each other, and a receiving rail is provided on the inner surface of the support column on which a fall prevention device provided on the elevating table can act.

At this time, the receiving rail is fixed by forming a female threaded hole at a predetermined location on the support, and also forming a bolt hole on the receiving rail side, and then inserting a bolt passed through the bolt hole from the outside into the female threaded hole. By screwing it together, it was attached to the specified location on the support.

[0005]

[Problems to be Solved by the Invention] According to the above-mentioned conventional type, forming a large number of female screw holes in the support reduces the strength of the support itself. A thick plate must be used. Furthermore, the plate thickness of the support column must be determined in accordance with the diameter (size) of the bolt in order to obtain sufficient strength. As a result, the support column becomes thicker and heavier, which increases the weight of the entire loading/unloading device.

[0006]Furthermore, since the female screw hole is formed by tapping after forming the pilot hole, a large amount of working time is required for machining. Furthermore, large distortions occur in the processed portion, requiring work to remove the distortions, and the distortion treatment marks become unsightly.

[0007] The object of the present invention is to ensure sufficient strength while reducing the plate thickness of the support, and furthermore, the machining work of the part for fixing the receiving rail can be performed without distortion and in a short time. The object of the present invention is to provide a loading/unloading device with a fall prevention device.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the loading and unloading device with a fall prevention device of the present invention includes a traveling machine body having a pair of front and rear columns erected, a lifting platform guided by these columns, and a lifting platform that is guided by the columns. a loading/unloading tool provided on the lifting platform so as to be able to move in and out in the lateral direction, the support being formed from a rectangular pipe body;
A guide surface is formed on the left and right side surfaces of this support column, and a guide roller of the lifting platform can freely face the guide surface, and a bolt is provided protruding from the inner surface of the support column, and a fall prevention device provided on the lifting platform is provided through the bolt. fixes the freely operable receiving rail.

[0009]

[Operation] According to the structure of the present invention, a bolt is provided protrudingly by welding on the inner surface of the support, and the receiving rail is fixed via this bolt, so that no female screw hole is formed in the support. Although the support column has a thin plate thickness, sufficient strength can be ensured, and this strength can be made regardless of the diameter of the bolt.

Furthermore, compared to the method of forming a female threaded hole, the method of protruding the bolt by welding allows the machining work to be carried out in a shorter time and generates almost no distortion. In this way, the fall prevention device can safely act on the receiving rail that is firmly fixed via the bolts.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 5 and 6, numeral 1 denotes shelves arranged in parallel with passages 2 therebetween, and has a plurality of divided storage spaces 3 in the vertical and horizontal directions. Reference numeral 4 denotes a loading/unloading device disposed in the passageway 2, which includes a traveling body 7 supported and guided by a floor rail 5 via wheels 6, a pair of front and rear columns 8 erected from this traveling body 7, and these columns 8. Connecting the upper ends of the ceiling rail 9
The main body is constituted by an upper frame 10 that is guided through rollers or the like.

The lifting platform 11 disposed between the pillars 8 has a fork 12 that can move in and out in the horizontal direction.
In addition, a lifting drive device 13 linked to the lifting platform 11 and wheels 6 are provided.
A traveling drive device 14 interlocked with is provided on the traveling body 7. 15 indicates a control panel.

In FIGS. 1 to 6, the support column 8 is a rectangular pipe body (quadrangular tube shape), and its opposing inner surfaces serve as rail fixing surfaces 8a, and its left and right sides serve as guide surfaces 8b. On the rail fixing surface 8a, a receiving rail 17 on which a drop prevention device 40 provided on the lifting platform 11 can freely operate is provided along the entire length in the height direction at a position closer to one side. That is, the receiving rail 17 has a fixed portion 17A.
and the receiving part 17B which is perpendicular to this, L
The fixing portion 17A has bolt holes 18 formed in a plurality of upper and lower locations in the thickness direction.

A bolt (stud bolt) 20 is welded to protrude from the rail fixing surface 8a of the support column 8, and the receiving rail 17 is fixed via this bolt 20. That is, each bolt hole 18 is fitted into the bolt 20 protruding inward from a predetermined position of the support column 8, and the bolt 20 is inserted into the bolt hole 18.
The receiving rail 17 can be fixed on the rail fixing surface 8a of the support column 8 by screwing the nut 21 into the column 0 and tightening the nut 21.

The lifting platform 11 is composed of a base frame 25 on which the loading/unloading tool 12 is arranged, and side frames 26 erected from the front and rear ends of the base frame 25. Guide rollers 27 for preventing rolling, which can freely face the surface 8b, are freely rotatably attached via support shafts 28, respectively. In each side frame 26, two sets of guide rollers 27 are disposed, one on the left and one on the left. Then, the side frame 26
A pair of upper and lower rollers 29 are provided to prevent back and forth shaking.

The elevating drive device 13 has a drum 31 that is interlocked with a motor 30, and after passing a first chain 32 wound around the drum 31 into one of the pillars 8 via a lower chain ring 33, , is interlocked with the fall prevention device 40 provided on both side frames 26 via the upper chain ring 34. Also drum 3
The second chain 35 wound in the opposite direction to the guide chain ring 34
After passing through, it is linked to the base frame 25.

The fall prevention device 40 has a pair of left and right rotating shafts 42 in the front and back direction attached to the side frame 26 via bearings 41, and a pair of left and right rotating shafts 42 are attached to the outer ends of these rotating shafts 42 and can freely act on the receiving rail 17. A clamping piece 43 is attached. These clamping pieces 43 have a cam plate shape, and the outer periphery thereof is formed into a continuous claw-shaped cam surface 44, so that the clamping pieces 43 can swing left and right around the axis of rotation.

An operating link 45 is provided at the outer end of the rotating shaft 42.
The middle part of is fixed. The inner ends of these operating links 45 are connected by a bent link 46, and between a push rod 48 connected to a bent pin 47 of this bent link 46 and a flange 49 provided at the lower part of the side frame 26, A compression spring 50 is interposed to bias the clamping piece 43 in the clamping direction.

A vertical guide member 51 is provided at the upper part of the side frame 26, and an elevating rod 52 inserted through the guide member 51 can be moved up and down within a certain range. This lifting rod 5
A flange 53 is connected to the lower end of 2, and the flange 53
The upper end and the outer ends of both operating links 45 are connected by a link 54, and the free end of the first chain 32 and the upper end of the lifting rod 52 are connected by a pin 55.

Next, the operation of the above embodiment will be explained. The loading/unloading device 4 moves through the loading/unloading tool 12 into the target compartment storage space by a combination of the running action in the passage 2, the vertical movement of the lifting platform 11, and the lateral movement of the loading/unloading tool 12. The cargo 38 is delivered to and from the terminal 3.

The lifting platform 11 can be moved up and down by rotating the drum 31 in forward and reverse directions using the motor 30, and by winding up or letting out the first chain 32. At that time, the guide surface 8b
Since the guide roller 27 is guided by the guide roller 27, there is no left-right shaking, and since the roller 29 is guided by the rail fixing surface 8a, there is no back-and-forth shaking.

The suspension force acts on the lifting table 11 side because the flange 53 attached to the lower end of the lifting rod 52 comes into contact with the lower surface of the top plate of the side frame 26. At this time, the flange 53
is at its rising limit, both links 54 are pulled up,
The rotating shaft 42 rotates against the compression spring 50 so that the outer end of the operating link 45 rises, and the cam surface 44 of the clamping piece 43
The receiving rail 17 is spaced apart from the receiving rail 17. Therefore, the lifting platform 11 can be moved up and down without any problem.

[0023] When the first chain 32 is cut during the suspension action, the suspension force by the first chain 32 is released. Then, the repulsive force of the compression spring 50 generates a force that pulls up the inner end of the operating link 45 via the bent link 46, and the lifting rod 52
A force that pushes down the outer end of the operating link 45 due to the weight of the link 54 and the like acts on the rotating shaft 42 . As a result, the clamping piece 43 is forcibly swung around the axis via the rotating shaft 42, and the receiving portion 17 of the rail 17 receives the cam surface 44.
It will wedge into B. Therefore, since the lifting platform 11 strongly clamps the receiving portion 17B with the pair of clamping pieces 43, it becomes integrated with the support column 8 side and is prevented from falling.

[0024]

[Effects of the Invention] According to the present invention having the above structure, the bolts are welded to protrude from the outer surface of the support, and no female screw holes are formed in the support, so the support has sufficient strength even though the plate thickness is reduced. This strength can be maintained regardless of the bolt diameter. Therefore, the weight of the support column, that is, the weight of the entire loading/unloading device can be reduced.

[0025] Furthermore, compared to the method of forming a female threaded hole, the method of protruding the bolt by welding allows processing work to be carried out in a shorter time and improves efficiency.Furthermore, since almost no distortion occurs, It is possible to eliminate the need for distortion removal work and improve the aesthetic appearance.

[0026] In this way, the fall prevention device can be safely operated on the receiving rail that is firmly fixed via the bolt.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a receiving rail fixing portion showing an embodiment of the present invention.

FIG. 2 is an enlarged view of main parts in FIG. 1;

FIG. 3 is a partially cutaway side view of the same.

FIG. 4 is a partially cutaway front view of the same.

FIG. 5 is a side view of the loading/unloading device section.

FIG. 6 is a front view of the same.

[Explanation of symbols]

1 Shelf 2 Passage 4. Loading and unloading device 7. Traveling aircraft 8 Pillar 8a Rail fixing surface (inner surface) 8b Guide surface 11 Lifting platform 12　　　　　Insertion and withdrawal tool 17 Receiving rail 17A Fixed part 17B Receiving part 18 Bolt hole 20 bolts 21 Natsuto 27 Guide roller 40 Fall prevention device 43 Clamping piece 50 Compression spring

Claims (1)

[Claims] Claim 1: A traveling aircraft having a pair of front and rear columns erected thereon, a lifting platform guided by these columns, and a loading/unloading tool provided on the platform so as to be able to move in and out in the lateral direction, It is formed from a rectangular pipe body, and a guide surface is formed on the left and right side surfaces of the support column so that the guide rollers of the lifting platform can freely face each other,
A loading/unloading device with a fall prevention device, characterized in that a bolt is provided protruding from an inner surface of the support, and a receiving rail on which a fall prevention device provided on the lifting platform can freely operate is fixed via the bolt.