JPS6251600A - Cargo gear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cargo handling device in which a fork pawl is movable up and down along a mast.

Conventional technology The fork claws are movable up and down along the mast. When loading cargo onto a rack, the operator visually positions the fork claws so that they do not interfere with the left and right rack supports. It is normal to do so.

Problems to be Solved by the Invention Since the positioning is done visually by the operator, the positioning work is troublesome, and if the width of the cargo is larger than the distance between the left and right rack supports, that is, the width of the rack opening, the problem described above may occur. It is necessary to perform positioning with good accuracy, and the positioning work is repeated many times, which makes the positioning work very troublesome.

A companion means to solve the problem is to have a fork claw on the elevating body that moves up and down along the working mast, and a fork claw mounting body that can be moved left and right by a shift mechanism. A controller is provided that operates the shift mechanism based on a detection signal from a rank post detector to align the center of the fork pawl with the center of the rack opening, so that a gap can be automatically maintained between the load and the rack post. This is the next thing.

A cargo handling device 2 is provided at the front of the vehicle body 1 according to the embodiment, and the cargo handling device 2
The fork claw 5 is attached to the elevating body 4 that moves up and down along the mast 3.
The shift machine #f6 is provided with a bracket 9 of a fork pawl mounting body 8 on a guide rod 7 provided on the elevating body 4 so as to be slidable left and right. A cylinder 10 is pivotally connected to an elevating body 4 and a seven-point claw mounting body 8.

The rack 11 is constructed by installing a horizontal plate 13 between the left and right rack columns 12, and a rack column detector 14 for detecting the rack column 12 is provided protruding from the side of the seven-piece claw mounting body 60. This rack post detector 14 is attached to the main body 15! I
, i2, and the third sensor +6.17.18 are set up as follows, and each sensor serves as a floodlight that emits light toward the rack support 12 and a light receiver that receives reflected light from the rack support 12. When the light receiver detects light, it outputs a detection signal from the rank support, and when the 11m3 optical sensor +6, +8 outputs a detection signal, it outputs a detection signal from the center of the fork claw 5 and the left and right rack support 12. .12
If the centers between them, that is, the centers of the rack openings do not match, and the second optical sensor 17 outputs a detection signal fc, they match.

Figure A2 is a hydraulic circuit diagram of the cylinder, and the pressure oil discharged from the pump 20 is controlled by the switching valve 21 to extend the cylinder 10, to the contraction chamber 10α,
10b, and the switching valve 21 is always held at the neutral position N, and when the first solenoid 21α is energized, it is switched to the extended position ■, and when the second solenoid 21b is energized, it is switched to the retracted position H. It is a three-position switching valve, and the first and second solenoids 21α and 21b are energized and demagnetized by the controller 22.

When the detection signal is input from the tMI optical sensor 16, the controller 22 excites the first solenoid 21cL, and
When a detection signal is input from the sensor 18, the m2 solenoid 21b is energized.

Because of this, when the vehicle body 1 is stopped in front of the rack 11 and the cargo A is placed in the rack 11, the ml
, the cylinder 1o is extended and contracted by the second and third main sensors 16° and 17.17, and the 7-inch pawl mounting body ε slides from side to side with respect to the elevating body 4, so that the fork pawl mounting body 8 can be automatically positioned at a position where only the m2 optical sensor 17 detects the rack support 12, and a position where the center of the fork pawl 5 and the center of the rack opening match, and the luggage l and the rack support 12 are The baggage A can be placed on the rack 11 by ensuring a gap S between them.

Note that three or more original sensors may be provided, only one optical sensor may be provided, and an ultrasonic sensor may be provided in place of the optical sensor.

Alternatively, a feeder rod and a nut member rotated by a motor are provided in place of the cylinder 1o, and a forward/reverse signal is sent to this motor from the controller 22 to move the fork pawl mounting body g left and right. Good, the motor 30 as shown in Figure 3
The protruding side of is connected to the screw shaft 32 via the gear 31, and the screw shaft 32 is fitted with the nut member 34K1 of the piston rod 33, and by rotating the screw shaft 32, the piston rod 33 is moved relative to the cylinder body 35. Install a telescoping electric cylinder and connect the controller to this motor 3o:
)22, a forward/reverse rotation signal may be output.

Effects of the Invention Since the center of the rack opening and the center of the fork pawl can be automatically positioned, the task of placing the cargo on the fork pawl onto the rack becomes easy.

In particular, when installing a rack, there may be variations in the tilt.
Furthermore, even if there are variations in the inclination of each tier of a high-sliding height (3-tier, 4-tier) rack, a gap can be secured between the rack support and the cargo, making loading work easier.

17'j, the gap between the rack support and the baggage can be made smaller compared to the case of visual positioning, and the width of the baggage that can be accommodated in a rank with the same opening size can be increased.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall plan view, FIG. 2 is a hydraulic circuit diagram, and FIG. 3 is a sectional view of an embodiment using an electric cylinder. 3 is a mast, 4 is an elevating body, 5 is a fork pawl, 6 is a shift mechanism, 8 is a fork pawl mounting body, 14 is a rack support detector, and 22 is a controller.

Claims (1)

[Claims] An elevating body 4 is provided along the mast 3 so as to be movable up and down, and a fork pawl mounting body 8 having a fork pawl 5 is attached to the elevating body 4 so as to be movable left and right by a shift mechanism 6. The system includes a rack post detector 14 for detecting rack posts, and a controller 22 that operates the shift mechanism 6 so that the center of the rack opening and the center of the fork pawl 5 coincide with the center of the rack opening based on the detection signal of the rack post detector 14. A cargo handling device characterized by: