JPH1035351A - Lifter switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily elevate a lifter floor face, when a rear wall part of a loading box of a car is used as the lifter floor face. SOLUTION: A lifter floor face 22 is formed by elevating a rear wall part 13 of a loading box 2 along the guide rails 1 formed on the left and right rear parts of the loading box for a car, and a foot lifting switch 23 and a foot lowering switch 24 are separately installed on the lifter floor face 22. The elevation of the lifter floor face 22 is controlled by independently operating the switches 23, 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifter switch of a lifter provided on a packing box of a vehicle for loading and unloading a load on the packing box.

[0002]

2. Description of the Related Art When a rear wall of a packing box in a vehicle is used as a floor surface of a lifter, an up / down switch for raising and lowering the rear wall is conventionally provided on a side wall of the packing box. When a worker places a load on the lifter floor formed by the rearward rotation of the wall and raises and lowers the lifter floor, the load is unstable and difficult to settle like a roll-shaped article, and is always fixed. If the operator has to support the load with both hands, the operation of the up / down switch becomes very difficult, and there is a major drawback in that it is inconvenient to load and unload the load.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a case where a lifter provided on a carton is used even when a worker's hand on the lifter floor is blocked by a load or the like. Another object of the present invention is to provide a lifter switch capable of easily operating the lifter floor.

[0004]

In order to achieve this object, a lifter switch according to the present invention is provided on a floor surface of a load / unload lifter mounted on a vehicle packing box. The lifter has a tread protruding upward from the lifter floor, and is operated by depressing the tread to operate the lifter floor.

That is, since the lifter switch is provided on the lifter floor and the operation tread protrudes upward from the lifter floor, the operator on the lifter floor depresses the operation tread of the lifter switch with his / her foot. Since the lifter switch can be easily operated to raise and / or lower the lifter floor, the operator does not need to use his / her hand to operate the lifter switch.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention shown in the drawings will be described below. 1 to 5, guide rails 1 having a rectangular cross section are arranged along the rear ends of the left and right side walls 3 of the carton 2, respectively, and are respectively suspended from the rear ends of the side walls 3. Upper and lower pulleys 6 are disposed between the front wall 4 and the intermediate wall 5 of the rail 1, and grooves 8 extending vertically are formed in the intermediate wall 5 and the rear wall 7 of each guide rail 1. .

On the other hand, a vertically long plate 10 is inserted between the intermediate wall 5 and the rear wall 7 of each guide rail 1, and ribs 11, 12 extending vertically are formed on the front and rear surfaces of the plate 10, respectively. The front rib 11 fits into the groove 8 of the guide rail intermediate wall 5 and is guided vertically by the groove 8, and the rear rib 12 fits into the groove 9 of the guide rail rear wall 7. Are guided up and down by the grooves 9.

The right and left lower ends of the rear wall 13 of the packing box 2 are pivotally connected to the lower ends of the rear ribs 12 by pins 14, respectively. Further, wires 15 are connected to the upper ends of the front ribs 11, respectively. Are respectively hung on the upper and lower pulleys 6, and then connected to a hydraulic cylinder 16, and the hydraulic cylinder 16 is operated by a hydraulic motor 17 as described later.

A code reel 18 is fixed to the outer surface of the guide rail 1, and as the rear wall 13 moves up and down along the guide rail 1, the code 19 is moved to the code reel 1.
8, the vehicle body side to which the guide rail 1 is attached and the rear wall portion 13 are always connected.

As shown in FIGS. 1 and 6, a switch board 35 provided with an up / down switch 20 and a foot main switch 21 of the rear wall 13 is provided on the rear side surface of the packing box side wall 3. Are arranged, and the rear wall 13 is
When the lifter floor 22 is rotated horizontally about the lifter 4 to form the lifter floor 22 as shown in FIG. 1, the lift switch 23 and the down switch 24 having the same structure are provided on the left and right sides of the lifter floor 22, respectively. ing.

As shown in FIG. 7, when the operating rod 25 is urged upward by a spring 26 and positioned by a stopper 27, the lift switch 23
8 protrudes upward from the upper surface of the lifter floor surface 22,
When the tread surface 28 is pushed down to the lower intermediate position against the urging force of the spring 26 and the operating rod 25 is positioned by a knock pin or a knock ball (not shown), the contact 29 on the outer peripheral surface of the operating rod 25 and the other contact 30 Is connected to
The ascending switch 23 which was off until then is turned on,
Further, when the tread surface 28 is strongly pressed down, the contact 29 and the contact 30 are separated from each other, the up switch 23 is turned off, and the lowermost position of the operating rod 25 is regulated by the stopper 31.

FIG. 8 shows the switches 20, 21, 23,
1 shows an electric circuit such as a hydraulic motor 24 and a hydraulic motor 17. The up / down switch 20 has an up contact 32 and a down contact 33, and operates as described later.

The operation of the above device will be described. The up / down switch 20 of the switch board 35 is at the center stop position when the lifter is not used, and when the up / down switch 20 is manually turned on to the ascending side, the ascending contact 32 is connected. The hydraulic motor 17 operates in the direction in which the hydraulic cylinder 16 contracts,
When the hydraulic cylinder 16 contracts, the wires 15 on both sides of the vehicle are pulled in at the same time. Therefore, the left and right plates 10 are respectively guided by the guide rails 1 and pulled up by the wires 15 hung on the upper and lower pulleys 6. The cargo box rear wall portion 13 pivotally attached to the rear rib 12 is also pulled up together with both plates 10.

If the up / down switch 20 is manually turned on to the descending side, the descending contact 33 is connected and the hydraulic motor 17 operates in the direction in which the hydraulic cylinder 16 extends. Since the wires 15 are pulled out at the same time, the left and right plates 10 are respectively guided by the guide rails 1 and pulled down by the wires 15 hung on the upper and lower pulleys 6, and therefore,
The packing box rear wall 13 is also pulled down together with the two plates 10.

On the other hand, when the rear wall portion 13 of the packing box is rotated rearward about the pin 14 and becomes horizontal as shown in FIG.
When the foot main switch 21 is turned on with the switch in the stop position, the worker on the lifter floor 22
When the lifting switch 23 is turned on, the hydraulic motor 17 operates in a direction in which the hydraulic cylinder 16 contracts. , The up / down switch 20
Rear wall 1 in the same manner as when the
3 is raised as appropriate.

Further, when the worker operates the tread surface 2 of the lift switch 23,
If the connection of the contacts 29 and 30 is released by stepping on the foot 8 more strongly or by removing the foot from the tread surface 28, the lift switch 23 is turned off and the operation of the hydraulic cylinder 16 is stopped. It can be held at the height when it is.

Further, when the operator steps on the tread surface 28 of the lowering switch 24 with an appropriate strength, depresses the operating rod 25 to connect the contact 29 to the other contact 30 and turns on the lowering switch 24, the hydraulic pressure The motor 17 is the hydraulic cylinder 1
6 operates in the contracting direction, the back wall 13 of the packing box is appropriately pulled down in the same manner as when the up / down switch 20 is turned on to the down side, and the operator steps on the tread surface 28 of the down switch 24 more strongly. Alternatively, when the contacts 29 and 30 are disconnected by releasing the foot from the tread surface 28, the lowering switch 24 is turned off and the operation of the hydraulic cylinder 16 is stopped, so that the lifter floor surface 22 is set to the height at that time. Can be held.

Therefore, the worker on the lifter floor 22 needs
Up switch 23 or down switch 2 by own foot
Since the lifter floor 22 can be raised and lowered arbitrarily and easily or maintained at an appropriate height by appropriately operating 4, the worker cannot release his / her luggage on the lifter floor 22. Even in such a case, the lifter floor surface 22 can be raised and lowered appropriately relatively easily,
The work of loading and unloading the luggage in the packing box 2 can be performed easily.

Also, since the up switch 23 and the down switch 24 are provided individually, each switch 23, 2
The operation of Step 4 is simplified, malfunctions are less likely to occur when the lifter floor 22 is raised or lowered, and the safety of the unloading operation can be improved.

Further, the up switch 23 and the down switch 24 are respectively turned on at an intermediate position of the operating rod 25, and are turned off when the operating rod 25 is strongly pushed down, so that a two-stage operating structure is provided. For example, even if a load is loaded on the tread surface 28 of one of the up switch 23 and the down switch 24 and the operating rod 25 is strongly pushed down, the switch is kept off, Lifter floor 22 from this side
Has the advantage of preventing malfunction of

In the above embodiment, the rear wall of the packing box in the vehicle is used as the floor of the lifter.
Even in the case where the side wall of the packing box in the vehicle is used as the floor of the lifter, the same operation and effect as in the above embodiment can be obtained by appropriately applying the same device as that in the above embodiment to the packing box side wall. Needless to say, it is also possible to provide a plurality of lift switches and / or down switches in each of the above embodiments at appropriate places on the floor of the lifter so that they are connected in parallel to the hydraulic motors. With this configuration, the lifting and lowering control of the lifter floor surface can be performed more easily by operating these switches.

[0022]

According to the lifter switch of the present invention, the lifter switch is provided on the lifter floor,
Since the operation tread protrudes upward from the lifter floor, the worker on the lifter floor can easily operate the lifter switch by pushing down the operation tread of the lifter switch with his / her foot to operate the lifter floor. Since the operator can operate the lifter switch, the operator does not always need to use his / her own hand, and can easily carry out the loading / unloading of the load.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an embodiment of the present invention.

FIG. 2 is an exploded layout view of a main part in the embodiment.

FIG. 3 is an exploded perspective view of a main part in the embodiment.

FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV in FIG. 1;

FIG. 5 is an enlarged side view of a main part in the embodiment.

FIG. 6 is an enlarged view of a portion VI in FIG. 1;

FIG. 7 is an enlarged longitudinal sectional view of a main part of the embodiment.

FIG. 8 is an electric circuit diagram of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide rail 2 Packing box 3 Side wall part 6 Pulley 10 Plate 13 Rear wall part 15 Wire 16 Hydraulic cylinder 17 Hydraulic motor 19 Code 20 Up / down switch 21 Foot main switch 22 Lifter floor surface 23 Up switch 24 Down switch 25 Operating rod 28 Tread surface 29 , 30 contacts

Claims (3)

[Claims] 1. A vehicular packing box having a tread surface provided on a floor surface of a luggage unloading lifter mounted on the same packing box, protruding upward from the lifter floor surface, and depressing the tread surface. A lifter switch configured to be operated to operate the lifter floor. 2. The lifter switch according to claim 1, wherein said lifter switch for lifting the lifter floor and said lifter switch for lowering said lifter floor are separately provided on said lifter floor. 3. The vehicle according to claim 1, wherein the tread is turned on by pushing down the tread to an intermediate position.
Lifter switch that turns off when pressed down further.