JP3365191B2 - Valve operating lever device for cargo handling vehicle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating lever device for operating a control valve for controlling the operation of hydraulic equipment such as a hydraulic cylinder in a cargo-handling vehicle such as a forklift truck, and more particularly to supporting the operating lever. A valve capable of improving the safety by restricting the rotation of the operating lever when the rotating bracket is rotated from a substantially horizontal state to a substantially vertical state due to the need for inspection and maintenance. Control lever device

[0002]

2. Description of the Related Art In a cargo-handling vehicle such as a battery forklift, for example, as shown schematically in FIG. A control valve mounting member 5 having a plurality of control valves 3 for controlling the operation of (not shown) is mounted, and a pair of left and right support brackets 7 provided on the upper part of the control valve mounting member 5 are provided with pins (not shown).
The rotary bracket 9 is provided so as to be rotatable from a normal substantially horizontal state to a substantially vertical state via the.

An operating lever 13 is rotatably supported on the rotary bracket 9 via a support shaft 11. The operation lever 13 has a structure in which a collar 15 fitted and supported by the support shaft 11, a lever rod 17 bent in an L shape, and a link 19 are integrally provided.
The tip of the link 19 is located above the control valve 3.

An upper end of an intermediate link 23 is pivotally connected to a tip end of the link 19 via a pin 21, and a lower end of the intermediate link 23 is provided on the control valve 3 so as to be vertically movable. It is pivotally connected to the upper end of the spool 3S via a pin 25. Further, the control valve 3 is provided with a limit switch 27 for detecting the vertical movement of the spool 3S and operating the hydraulic pump.

The axis of the pin 21 connecting the link 19 and the intermediate link 23 is almost the same as the axis of the mounting shaft of the rotary bracket 9 with respect to the support bracket 7 when the operating lever 13 is in the neutral position. It is configured to match.

[0006]

In the above configuration, when the top panel of the battery box 1 is opened due to the need for battery replacement or maintenance, the rotary bracket 9 is centered on the mounting position with the support bracket 7. The spool 3S of the control valve 3, the intermediate link 23, and the link 19 are rotated substantially vertically from the horizontal state to the substantially vertical state.

As described above, when the rotary bracket 9 is rotated from the substantially horizontal state to the substantially vertical state, the rotation center of the rotation bracket 9 and the axial center of the pin 21 connecting the link 19 and the intermediate link 23 to each other. Is substantially the same, the spool 3S of the control valve 3 is not operated up and down.

However, when the rotating bracket 9 is held in a substantially vertical state, the lever rod 17 has an arrow A.
When an external force in the direction acts, the link 19 is rotated around the support shaft 11, the spool 3S of the control valve 3 is pulled up, the limit switch 27 is operated, and the hydraulic device may be operated.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems as described above. The invention according to claim 1 is directed to an upper side of a control valve for controlling the operation of hydraulic equipment in a cargo handling vehicle. At the position, a rotary bracket that rotatably supports an operation lever for operating the control valve is provided so as to be rotatable from a substantially horizontal state to a substantially vertical state, and the link provided on the operation lever and the control valve are vertically moved. A valve operating lever device in a cargo handling vehicle, which is connected to a movable spool in a linked manner, is provided with a stopper that restricts the rotation of the operating lever when the rotating bracket is rotated in a substantially vertical state. It is a thing.

According to a second aspect of the present invention, a rotary bracket rotatably supporting an operation lever for operating the control valve is provided above the control valve for controlling the operation of the hydraulic equipment in the cargo handling vehicle, and the rotary bracket is substantially horizontal. Valve in a cargo handling vehicle in which a link provided to the operation lever and a spool provided to the control valve so as to be movable up and down are connected so as to interlock through an intermediate link. In the operation lever device, a stopper that restricts rotation of the rotation bracket in one direction when the rotation bracket is vertically rotated is provided at a pivotal connection portion between the link and the intermediate link, the link or the intermediate link. It is provided on the link.

According to a third aspect of the present invention, in the second aspect of the invention, a stopper is provided on the intermediate link above the position of the pivot pin connecting the link and the intermediate link, and the rotary bracket is provided in a vertical shape. The link comes into contact with the stopper when the link is rotated.

The invention according to claim 4 is the invention according to claim 2 or 3.
In the invention described in (3), a connecting bracket having a U-shaped cross section is provided at an upper end portion of the intermediate link connecting the link and the intermediate link.
The bottom of the character-shaped portion serves as a stopper.

[0013]

According to the first aspect of the present invention, there is provided a rotary bracket which rotatably supports an operation lever for operating the control valve above the control valve for controlling the operation of hydraulic equipment in a cargo handling vehicle. In a valve operating lever device for a cargo handling vehicle, which is rotatably provided from a substantially horizontal state to a substantially vertical state, and in which a link provided to the operation lever and a spool provided to the control valve so as to be movable up and down are interlocked with each other. Since the stopper for restricting the rotation of the operating lever when the rotating bracket is rotated in a substantially vertical state is provided, when the rotating bracket is rotated in a substantially vertical state, the stopper causes the operation lever to move. Since the rotation is restricted, the control lever is not rotated when an external force is applied, and the spool of the control valve is pulled up. Bet is that there is no. Therefore, it is possible to improve the safety when the rotating bracket is rotated and held vertically.

According to a second aspect of the present invention, a rotary bracket, which rotatably supports an operation lever for operating the control valve, is provided substantially above a control valve for controlling the operation of hydraulic equipment in a cargo handling vehicle. Valve in a cargo handling vehicle in which a link provided to the operation lever and a spool provided to the control valve so as to be movable up and down are connected so as to interlock through an intermediate link. In the operation lever device, a stopper that restricts rotation of the rotation bracket in one direction when the rotation bracket is vertically rotated is provided at a pivotal connection portion between the link and the intermediate link, the link or the intermediate link. Since it is provided on the link, when the rotating bracket is rotated vertically, the rotation of the link is restricted by the stopper. Tsu in which preparative can be improved safety when pivoted to a vertical shape.

According to a third aspect of the present invention, in the second aspect of the invention, a stopper is provided in the intermediate link above the position of the pivot pin connecting the link and the intermediate link, and the rotary bracket is provided in a vertical shape. Since the link comes into contact with the stopper when the rotary bracket is rotated to the right, it is possible to improve the safety when the rotary bracket is vertically rotated, as in the invention according to claim 2. Is something that can be done.

The invention according to claim 4 is the invention according to claim 2 or 3.
In the invention described in (3), a connecting bracket having a U-shaped cross section is provided at an upper end portion of the intermediate link connecting the link and the intermediate link.
Since the bottom of the letter-shaped part serves as a stopper,
The connecting bracket is easy to manufacture.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION To explain an embodiment of the present invention with reference to FIG. 1, the same reference numerals are given to the components having the same functions as those described above, and the duplicate description will be omitted. . Note that FIG. 1 schematically shows only a main part for easy understanding.

In FIG. 1, the difference from the above-mentioned structure is that the connecting bracket 2 provided at the upper end of the intermediate link 23 is provided.
9 is provided with a stopper 31 and the tip of the link 19 is formed in an arc shape centering on the pin 21 and in contact with the stopper 31, and the other configurations are the same as those described above.

The stopper 31 is the rotary bracket 9
It is provided at a position where the link 19 abuts when (not shown in FIG. 1) is rotated from the horizontal state to the vertical state.

Therefore, when the rotating bracket 9 is moved from the horizontal state to the vertical state, the lever rod 1
When an external force in the direction of the arrow A acts on 7 to rotate the link 19 and the like in the counterclockwise direction in FIG.
Since the rotation of the link 19 and the like in the counterclockwise direction is restricted, the safety is improved.

The structure of the connecting bracket 29 is as follows.
As shown in FIG. 2, the stopper 31 is welded so as to connect the rising portions of the connecting bracket 29A that is bent in a U shape and the bottom portion B is arranged on the lower side. Alternatively, as shown as the connecting bracket 29B, the bottom portion B bent in a U shape is arranged so as to be located laterally, and the bottom portion B functions as the stopper 31. Is also possible.

As described above, when the connecting bracket 29 is bent into a U-shape, it can be easily manufactured by press working.

Further, as shown in FIG. 3 (A), the link 1
It is also possible to reverse the configurations of 9 and the connecting bracket 29, that is, to form the link 19 side in a bifurcated shape and place the connecting bracket 29 between the bifurcated links 19. .

Further, the stopper 31 may be provided on the link 19 side, as shown in FIG. 3 (B).

By the way, in the above description, after the rotary bracket 9 is rotated from the horizontal state to the vertical state,
In the above, the case where an external force in the direction of arrow A is applied has been described, but in the case of the direction opposite to arrow A, a stopper 33 capable of contacting the spool 3S can be provided below the intermediate link 23. .

That is, when the rotary bracket 9 is in the horizontal state and the link 19 of the operating lever 13 is in the horizontal state, the tip portion of the link 19 due to the operation of the lever rod 17 is largely displaced in the vertical direction in FIG. However, the displacement in the left-right direction is small, and the swing range (tilt angle) in the left-right direction of the upper end portion of the intermediate link 23 is small. Due to the link mechanism, the upper portion of the intermediate link 23 in FIG. 1 is inclined rightward from the vertical state.

Therefore, in this case, the stopper 33 is not pressed by the spool 3S and the rightward swing of the intermediate link 23 is allowed.

When the rotary bracket 9 is rotated in the vertical state and the link 19 of the operating lever 13 is brought into the vertical state, an external force in the direction opposite to the arrow A acts on the lever rod 17, and in FIG. When the link 19 located in the state tends to be rotated clockwise, the intermediate link 23
Tends to be rotated counterclockwise around the pin 25.

At this time, since the vertical displacement of the tip portion (lower end portion) of the link 19 is small and the horizontal displacement tends to be large, the intermediate link 23 tends to largely incline in the horizontal direction. . When the inclination angle of the intermediate link 23 in the left-right direction increases, the stopper 33 moves the spool 3S.
And the inclination of the intermediate link 23 to the left is regulated. That is, in FIG. 1, the lever rod 1
The rotation of 7 in the direction opposite to the arrow A is restricted.

As can be understood from the above description,
According to this example, when the rotary bracket 9 is rotated from the horizontal state to the vertical state, the links 19 of the operation lever 13 are simultaneously brought into the vertical state, and the stopper 31 moves the link 19 and the intermediate link 23 in one direction. Since the rotation is restricted, it is possible to prevent the operation lever 13 from being carelessly rotated in one direction when, for example, replacing the battery or performing maintenance / inspection, thereby improving safety. is there.

[Brief description of drawings]

FIG. 1 is an operation explanatory view schematically showing a main part of a valve operating lever device according to an embodiment of the present invention.

FIG. 2 is a perspective explanatory view showing a form of a connecting bracket.

FIG. 3 is an explanatory diagram showing a mounting example of a stopper.

FIG. 4 is an explanatory diagram schematically showing a main part of a conventional configuration.

[Explanation of symbols]

3 control valve 3S spool 7 Support bracket 9 rotation bracket 11 Support shaft 13 Operation lever 17 Lever rod 19 links 21 pin 23 Intermediate link 29 Connection bracket 31 Stopper

Claims (4)

(57) [Claims] 1. A rotary bracket rotatably supporting an operation lever for operating the control valve above a control valve for controlling the operation of a hydraulic device in a cargo handling vehicle is rotated from a substantially horizontal state to a substantially vertical state. In a valve operating lever device in a cargo handling vehicle, which is movably provided, and a link provided in the operating lever and a spool provided in the control valve so as to be movable up and down are linked so as to interlock, the rotary bracket is set to a substantially vertical state A valve operating lever device in a cargo handling vehicle, comprising a stopper for restricting the rotation of the operating lever when the valve is operated. 2. A rotating bracket, which rotatably supports an operation lever for operating the control valve, is provided above the control valve for controlling the operation of hydraulic equipment in a cargo handling vehicle and is rotated from a substantially horizontal state to a substantially vertical state. A valve operating lever device in a cargo handling vehicle, wherein a link provided movably and provided on the operation lever and a spool provided on the control valve so as to move up and down are connected so as to interlock with each other through an intermediate link. And a stopper that restricts the rotation of the rotation bracket in one direction when the rotation bracket is vertically rotated is provided at the pivotal connection portion between the link and the intermediate link. A valve operating lever device for a characteristic cargo handling vehicle. 3. The invention according to claim 2, wherein a stopper is provided on the intermediate link above the position of the pivot pin connecting the link and the intermediate link, and when the rotary bracket is vertically rotated, the stopper is provided. A valve operating lever device in a cargo handling vehicle, wherein a link is configured to contact the stopper. 4. The invention according to claim 2 or 3,
A coupling bracket having a U-shaped cross section is provided at an upper end portion of the intermediate link for coupling the link and the intermediate link, and a bottom portion of the U-shaped portion of the coupling bracket serves as a stopper. A valve operating lever device in a vehicle.