JPH01203198A - Expansion type platform of order picker vehicle etc. - Google Patents

Abstract

PURPOSE:To safely perform picking work on account of no clearance between a rack and a platform, by forming the platform by combination of a fixed floor fixed to a lift bracket and moving floors horizontally movable in the widthwise direction against the fixed floor. CONSTITUTION:A fixed floor 4 is fixed to a lift bracket 2. In front of and behind the back of the fixed floor 4, rail guides are provided, and on the right and left side of the fixed floor, movable floors 5L, 5R which are movable in the direction of wheel width along the rail guides are provided. The movable floors 5L, 5R are expanded or contracted in the direction of wheel width due to rotation of screw shafts 21L, 21R driven by a driving motor. When a platform stops at a prescribed position, a driving device 6 is driven, and the movable floors 5L, 5R expand in the widthwise direction and stop by bumping and touching of limit switches LS1, 2 to a rack 28. Consequently the clearance between the rack 28 and the platform disappears and the picking work can be safely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is applied to a cargo handling vehicle such as an order picker or a rack truck in which an operator ascends and descends with an R unloading device (hereinafter referred to as an order picker). (referred to as cars, etc.), and specifically relates to planes 1 to 4 in which an operator is on board.

(Prior art) As shown in Fig. 5, a general auto-pioneer car is equipped with a fork q and a brat A-no\3 on a lift bracket 1 that goes down to the square 1 and moves R.
On the plano 1 to frame A-3, the operator not only performs traveling operations between racks and 7-1 guard operations, but also performs operations to take cargo into and out of rack shelves (hereinafter referred to as picking operations). It has become.

(Problem to be Solved by the Invention) By the way, since order picker vehicles and the like perform cargo handling work in passages created between racks, both left and right ends of the blanks 1 to 3, which are formed to have approximately the same width as the vehicle body width, Naturally, there is a certain gap between the parts and the rack, and the existence of this gap becomes an obstacle for the operator to perform picking operations safely. Moreover, the rack spacing, that is, the width of the aisle created between racks, is not necessarily constant and can be much larger than the vehicle width, so in case (a), it is difficult to ensure safe work. Trouble 1 yells. In such a case, it is possible to deal with this by providing an order picker vehicle whose plano-form width is set wider than the vehicle body width. It is necessary to prepare two dedicated cars (1M, or plan 1 to form 1 and 2 cars of different widths by changing the form), which is a very wasteful countermeasure. be.

Therefore, in view of the above problems, the present invention has developed a plan 1 to form of an order picker vehicle, etc., which is capable of performing pinking work of 1 q without a gap between the rack and the shelf, regardless of the width of the aisle. Its purpose is to provide.

<Means for Solving the Problems> In order to solve the above problems, the present invention provides plans 1 to 71 which are installed in the order picker vehicle or the like to move up and down along the square 1. The form is composed of a fixed floor fixed to the lift bracket side, and a movable floor attached to the fixed floor so as to be horizontally movable in the width direction, and this movable floor is extended and contracted by a drive device. The main point is that it is structured as follows.

(Function) The movable floor is moved by the drive device to prevent it from expanding and contracting]
By enlarging or reducing the width of the form, it is possible to accommodate picking operations on rack shelves and traveling between racks.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In the order picker vehicle shown in FIG. 5, a swing 1 and a frame 3 for operating an operator are attached to a bracket 1 to 2 to a rift 1 that is lowered along a mast 1. As shown in Figs. 1 and 2, the plano 1 to frame A-3 are basically fixed floors 4 fixed to the rift 1 and the brackets 1 to 2, respectively on the left and right sides of the fixed floor 4. Left and right movable floors 51-. 5R, and a drive device 6 for causing the left and right movable floors 5L and 5R to extend and contract. .

A fixed floor 4 is formed in a rectangular shape with a left and right width approximately equal to the width of the vehicle body, and is provided with a fork 7 at the front end.In addition, pillars 8 are erected at at least four corners of the fixed floor 4. A handrail 9 is horizontally suspended from the front pillar 8 of these pillars 8, and a play 1-10 for mounting operating means for running, raising and lowering, etc. is fixed to the rear pillar 8.

Note that the rear column 8 is roughly extended upward and also serves as a column for the head guard 11. In addition, rail kites 12 are installed at the front and rear ends of the lower surfaces of the left and right fixed floors 5 m and 5 R, and extend parallel to the vehicle width direction. As shown in FIG. 4, the cross section is formed into an almost inverted 1-shape, and its lower end portion is connected to the fixed floor 4 by a back plate 13 of approximately the same size as d3, thus forming the back of the fixed floor 4. A space S is formed between the plate 13 and the plate 13.

On the other hand, the left and right movable floors 5m and 5R are installed so as to be able to move in and out of the space S in the lateral direction.

Both movable floors 51 and 5R are formed into a substantially rectangular flat plate shape with downward flange portions 5a at both the inner and outer ends, and at both the front and rear ends thereof, as shown in FIGS. 3 and 4. It is equipped with a rail 14 whose cross section is almost an inverted 1-shape,
These rails 1/I are the guide rails 12 of the fixed floor 4.
It can be extended and retracted via inner and outer guide rollers 15, 16. However, the inner guide roller 1
5 is attached to the rail 14 and rolls on the inner surface of the flange of the rail guide 12, and the outer guide roller 16 is attached to the rail guide 12 (pulled so that it rolls on the inner surface of the 7 flange of the rail 14). .Also, movable floor 5L,
At the two outer corners of 5R, columns 18 connected by handrails 17 are erected, and these columns 18 and the columns 8 of the fixed floor 4 are connected by removable connectors 19. connected. Note that this chain 19 may be replaced with a telescoping handrail.

Next, the drive device 6 arranged in the space S for extending and contracting the movable floors 5m and 5R is shown in FIGS. 1 and 2.
Explanation based on diagrams. This drive device 6 has left and right screens rotated using a reversible geared motor 20 as a drive source.

21R, and screw shirts 1 to 21L, and oaks h22L and 22R screwed to 21R. Specifically, a guard motor 20 is fixed on the back plate 13, and the gear motor 20 is connected to the intermediate Q1+2 via two pinion gears 23°24.
5, and then attach the conibar 4 to the intermediate shaft 25.
Noorjiyoin 1-26L.

Connected via 26R, screwshas 71 on the left and right side of the IC
It is designed to rotate 21L and 21R.

Note that the intermediate shaft 25 is supported on the back plate 13 via a bearing 27.

Therefore, one of the screw shirts 1 to 21L has a right-hand thread, and the other screw shirt 1 to 21R has a left-hand thread, and the left and right sleeves 1) and 21R have a left-hand thread.
11, 21R is the intermediate 'fil 25 in the vehicle width direction.
They are illuminated horizontally with the outer ends being free ends. And screwy 1771
The nuts 1 to 22L and 22R that are screwed into the movable floors 5L and 21R are fixed to the inner flange portions 5a of the movable floors 5L and 5R. Therefore, when the guard motor 20 rotates forward or backward, the left and right movable floors 5L and 5R extend and contract in opposite directions and at the same time to expand or contract the widths of the swings 1 to 3.

Next, the control circuit for the geared motor 20 will be explained based on FIG. 6. The rotational direction of the geared V-domain motor 20 is controlled by changing the direction of energization to the field coil. MRIE3 normally open contacts MRE2a, MRF3
When a is turned on, it rotates normally and the electromagnetic contactor M for reduction
RE1. Normally open contact of MRF4 MRE1 a, MRF4a
When it turns on, the situation is reversed.

Electromagnetic contactor MRIE2 for extension. MRF3 has two normally closed limit switches LS1. for limiting extension operation. l
s2 and a normally closed limit switch for limiting maximum extension1.
．． S3 and automatic return type push button switch SW1 for extension operation
are connected in parallel to a circuit in which MRE1. MR[E/I is connected in parallel to a circuit in which a normally closed limit switch L S /I for minimum reduction restriction and an automatic reset push button switch SW2 for reduction operation are inserted in series. Push button switch SW1 for this expansion operation and reduction operation. Both SWs 2 are of the two-contact type, constitute an interlock circuit for simultaneous operation, and are attached to the plate 10 of the fixed floor 4 so as to be operable on the plans 1 to 3. In addition, this double push button type switch SWI.

SW2 may be changed to one rotary switch with three positions on the right, including the middle tL position, the extension actuation system position, and the reduction actuation system position.

In addition, two limit switches L for limiting the extension operation are provided.
S1, 132 is attached to the outer flange portion 5a of the left and right movable floor 51.5R, and turns OFF when it comes into contact with the rack 28, and Glue 1 to Switzerland LS3 for limiting maximum extension are attached to the back plate 13. (=J) is turned off when it comes into contact with the inner flange 5a of the right movable floor 5R.

Furthermore, the limit switch L S4 for limiting the minimum reduction is mounted on the back plate 13 ('Jt), and the left movable floor 5L
When it comes into contact with the inner flange 5a, it is turned off.

This embodiment is constructed as described above, and its operation will be explained below.

When the extension push button switch SW1 is operated to the extension side when the platform A-3 is in the contracted state, the b contact turns OFF.
, the a contact turns ON, the b contact of this push button switch SW2 for reduction is in the ON state, the a contact is in the OFF state, and the J
: Each limit switch + 81. LS2. Since LS3 is in the ON state, the electromagnetic contactor M for extension
RF2. MRF3 is excited and its contacts MRF2a, M
RE3a is turned ON, and -920 is driven in the normal rotation direction. Therefore, the left and right screw shafts 21+, 21 are connected via the pinion gears A723, 24 and the intermediate shaft 25.
When R rotates, both the left and right nuts 1 to 22L and 22R, which are screwed into the right-hand and left-hand threads, move outward.

However, the left and right movable floors 5L and 5R are connected to the rail guide 12 of the fixed floor 4 (this is the guide roller 15,
16, and the widths of bluffs 1 to 3 are expanded as shown by phantom lines in FIGS. 1 and 2. Then, the left and right movable floors 5L-, 5R approach the rack 28, and the limit switch LS1 for limiting the left and right extension operation.
, LS2 comes into contact with the rack 28 and turns off, the power to the geared V-drive motor 20 is cut off and the motor 20 stops. If the distance between the left and right movable floor 51.5R and rack 28 is
~If going over the rotor, move the movable floor 5 on the right side.
Since the R 7 lunge 5a comes into contact with the limit switch L S 3 for limiting the maximum extension and turns it off, the geared motor 20 is stopped. Therefore, the operator bluffs 1
- Picking work can be performed with the frame A-3 in contact with or close to the rack shelf.

In addition, when the push button switch SW2 for reduction is operated at 85 after the picking operation, its b contact turns OFF and its a contact turns ON, and at this time, the b
Since the contact is ON, the a contact is OFF, and the limit switch L S 4 is ON, the reduction electromagnetic contactors MRF1 and MRF/l are excited, and their contact MRE1a.

MRE/Ia is turned on, and the gear 17-drive motor 20 is reversed. Therefore, at this time (31, due to the reversal of the left and right screw shafts 21+ and 21R, the left and right movable floors 51
, 5R moves inward, and the left and right movable floors 51,
When 5R returns to its original position, the flange portion 5a of the left movable floor 5L contacts the limit switch KAWA-84 for minimum reduction limit and turns it off.
- The motor 20 stops. 1, that is, bluff 1-) A-m 3
Since the vehicle is reduced to the width of the vehicle body, it is possible to travel along the passage between the racks in this state.

Note that the present invention is not limited to the embodiments described above, but can be modified as necessary. In other words, a hydraulic cylinder or a power cylinder can be used as the drive device 6 for the movable floors 51, 5R. In that case, it is possible to use two hydraulic cylinders and power cylinders on the left and right sides, so that the left and right movable floors 51, 5R can be directly moved. It is also possible to use a transmission mechanism consisting of one or a combination of a rack and a pinion for movement. Further, when the geared motor 20 is used as the drive source of the drive device 6, the illustrated screw feed method shown in C- can be changed to a feed method using a chain, wire, or the like. Furthermore, the left and right movable floors 51.5R do not necessarily have to be of a type in which the left and right sides move at the same time, and it is also possible to allow the left and right sides to extend and contract independently. Id roller 15°16
There is no problem in changing the rolling type to a sliding type.

(Effects of the Invention) As described in detail above, according to the present invention, by making the bluff 1 to the frame A telescopic, the gap between the bluff 1 and the frame A is extended or close to the rack. Since the picking operation can be carried out, the safety of the picking operation is greatly increased, and even if the aisle widths between the racks are different, it is possible to carry out multiple dedicated vehicles or bluffs. It becomes possible to respond with one order picker vehicle or the like without preparing a heform.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG.
- Figure 2 is a partially cutaway view of ff1-IT in Figure 1.
3 is a sectional view taken along the line ■-■ in FIG. 2, FIG. 4 is a sectional view taken along the IV-IV line in FIG. 2, FIG. 5 is a schematic perspective view of the order picker vehicle, and FIG. 6 is a movable FIG. 3 is a control circuit diagram of a geared motor for driving floor expansion and contraction. 3...Platform 4...Fixed floor 5...
- Movable floor 6... Drive device 12... Rail guide 14... Rail 20... Guard motor 21L, 21R... Screw shaft 22L, 22R
...Natsuto

Claims (1)

[Claims] A platform attached to a lift bracket that moves up and down along the mast, including a fixed floor fixed to the lift bracket side, a movable floor attached to the fixed floor so as to be horizontally movable in the width direction, and this movable floor. A telescoping platform for an order picker vehicle, etc., which is equipped with a drive device that telescopically moves an order picker.