JP3491426B2 - 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 a valve operating lever device for operating a control valve for controlling a hydraulic device such as a hydraulic cylinder in a cargo-handling vehicle such as a forklift truck, and its operating lever. The present invention relates to a valve operating lever device capable of easily achieving simplification and size reduction, and an operating lever having a simple structure and easy to manufacture.

[0002]

2. Description of the Related Art As a prior art example relating to the present invention, there is, for example, JP-A-7-10494. The configuration of the preceding example is as shown in FIG.

That is, a front wall 101 of a battery box (not shown) in a cargo handling vehicle such as a forklift.
In addition, a plurality of control valves 103 for controlling hydraulic equipment such as a hydraulic cylinder are installed in parallel, and each control valve 1
A cap-shaped holding body 107 is attached by bolts 109 to the upper end of each spool 105 in 03.

Then, when the cover for covering the upper part of the battery box is opened, the plate 111 which can be retracted upwards.
An intermediate portion of each tilting lever 115 for operating each control valve 103 is supported by a bracket 113 provided on the upper surface of the plate 111 so as to be vertically swingable via a pivot 117.

One end portion of each tilting lever 115 is connected to each holding body 107 via a ball joint 119, and the other end portions are respectively ball joints 121.
Via a connecting member 125 having a control lever 123. The connecting member 125 is swingably supported by the plate 111 via a plurality of ball joints 127 so as to swing in the left-right direction and the direction perpendicular to the paper surface in FIG.

[0006]

As is apparent from the above structure, in the structure of the prior art, the control lever 123 is swingably supported via the plurality of ball joints 127, and the tilting levers 115 and 115 are provided. Control lever 123
Are connected via a ball joint 121. Further, since each tilting lever 115 and each spool 105 of each control valve 103 are connected via a ball joint 119, the control lever 103 is operated from the control lever 123. The system configuration is extremely complicated.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems as described above, and the invention according to claim 1 is a plurality of control valves for controlling hydraulic equipment in a cargo handling vehicle. A rotary bracket that rotatably supports a plurality of operating levers for operating the control valve on a control valve mounting member having a shaft mounted on the upper end of the spool of each control valve, and the shaft is aligned with the axis of the pivot shaft. In the configuration in which it is mounted so that it can be rotated up and down about the center , each spool of each control valve is
A link for operating up and down is installed on each operation lever.
That is, the rotation center of the rotation bracket and the rotation center of each of the operation levers are brought close to each other at a distance substantially equal to the length of the link .

According to a second aspect of the present invention, a bracket is provided on an upper portion of a control valve mounting member having a plurality of control valves for controlling hydraulic equipment in a cargo handling vehicle, and the bracket is rotatably supported by the bracket. A plurality of operation levers for operating the control valves are mounted on the rotating bracket so as to be vertically rotatable, and links provided integrally with the operation levers and intermediate links connected to spools of the control valves are provided. Are pivotally connected to each other, and when the rotating bracket is rotated in the vertical direction, the center of rotation of the rotating bracket and the center of the connecting portion of each link and each intermediate link are aligned.

According to a third aspect of the present invention, in the first or second aspect of the invention, the operating lever is fitted and supported on a support shaft, a link integrally provided on the collar, and the link. The lever rod is integrally provided on the opposite side of the collar, and the lever rod is provided with a bent portion at one position between the base end portion and the tip end portion fixed to the collar. is there.

According to a fourth aspect of the present invention, in the invention according to the third aspect, the portion from the base end portion of the lever rod to the bent portion is inclined with respect to a straight line orthogonal to the axis of the collar,
The configuration from the bent portion to the tip portion is substantially parallel to a straight line orthogonal to the axis of the collar.

[0011]

[0012]

According to the first aspect of the present invention, a control valve mounting member having a plurality of control valves for controlling hydraulic equipment in a cargo handling vehicle is provided with a plurality of operating levers for operating the control valves. In a configuration in which a rotatable bracket rotatably supported is mounted rotatably up and down about an axis that coincides with the axis of a pivot provided at the upper end of the spool of each control valve, each spool of each control valve is For operating up and down
A link, the provided the operating levers, the Li and the center of rotation of the rotational center and the respective operating lever of the rotary bracket
It is possible to omit the intermediate link that connects the operating lever and the spool because it is close to the distance that is almost equal to the link length , and it is possible to directly operate the spool with the operating lever. As a result, the structure is simplified and the rotary bracket itself can be made compact, and the overall structure can be made compact.

According to a second aspect of the present invention, a bracket is provided on an upper portion of a control valve mounting member having a plurality of control valves for controlling hydraulic equipment in a cargo handling vehicle, and the bracket is rotatably supported up and down. A plurality of operating levers for operating the control valve are provided on the rotary bracket so as to be rotatable up and down, and links provided integrally with the operating levers and intermediates connected to the spools of the control valves are provided. The link is provided so as to be pivotally connected, and when the rotary bracket is rotated in the vertical direction, the center of rotation of the rotary bracket and the center of the connecting portion of the links and the intermediate links coincide with each other. The vertical movement of the operating lever can be directly transmitted to the spool of the control valve, which improves operability and shortens the link length, which simplifies the overall configuration and improves the compactness. Those capable of achieving reduction.

According to a third aspect of the present invention, in the first or second aspect of the invention, the operating lever is a collar fitted and supported by a support shaft, a link integrally provided in the collar, and the link. The lever rod is integrally provided on the opposite side of the collar, and the lever rod is provided with a bent portion at one position between the base end portion and the tip end portion fixed to the collar. Therefore, the structure of the lever rod is simple and the manufacturing thereof is easy.

According to a fourth aspect of the present invention, in the invention according to the third aspect, the portion from the base end portion of the lever rod to the bent portion is inclined with respect to a straight line orthogonal to the axial center of the collar,
Since the bent portion to the tip portion is substantially parallel to the straight line orthogonal to the axis of the collar, the distance between the tip portions of the lever rods is substantially equal when the dimension is larger than the length dimension of the collar. To arrange them at intervals, the inclination angle on the base end side can be adjusted, and the lever rod can be easily welded to the collar.

[0016]

[0017]

[0018]

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a valve operating lever device 1 according to the present embodiment is a battery box 3 for storing a battery in a cargo handling vehicle (not shown) such as a battery forklift truck (details are omitted). Yes and attached to close to the not illustrated) or battery box 3 position, for example when opening the top cover (upper panel synonymous) in the battery box 3, such as to perform replacement of the battery, the upper of the way direction It is configured to be rotatable to.

More specifically, a control valve mounting member 5 is arranged on the front side of the battery box 3 at a side position of a seat (not shown) on which an operator of a cargo handling vehicle is seated,
On the front surface of the control valve mounting member 5, a plurality of control valves 7A, 7B, 7C, 7D for controlling hydraulic equipment such as an appropriate hydraulic cylinder in a cargo handling vehicle are mounted in parallel in the left-right direction.

A pair of brackets 9 are integrally mounted on the upper front surface of the control valve mounting member 5, and a rotary bracket 13 is supported on the bracket 9 via a pair of pivot shafts 11 so as to be vertically rotatable. There is. This rotating bracket 1
3, a plurality of operation levers 17A, 17B, 17C, 17D are provided via a support shaft 15 provided close to the pivot shaft 11.
Are swingably supported in the vertical direction.

Each of the operating levers 17A, 17B, 17
C and 17D are configured as shown in FIG. That is, the operating lever 17 (the reference numerals A to D are omitted) has a collar 19 fitted and supported by the support shaft 15, and a short link 21 integrally fixed to the collar 19 by welding.
The collar 1 is located on the opposite side of the link 21.
9 and the lever rod 23 attached to 9.

The lever rod 23 has the collar 1
Bend portion 23C at an appropriate position between base end portion 23A fixed to 9 and tip end portion 23B to which knob 25 (see FIG. 1) is attached.
It has a substantially L-shape. Then, the base end side extending portion 2 between the base end portion 23A and the bent portion 23C.
3D has a configuration that is appropriately inclined with respect to a straight line in a direction orthogonal to the axis of the collar 19, and a distal end side extending portion 23E between the bent portion 23C and the distal end portion 23B.
Are provided substantially parallel to a predetermined straight line orthogonal to the axis of the collar 19.

According to the above configuration, since the lever rod 23 is simply bent into an L shape, the configuration of the lever rod 23 is simple, and when viewed in plan,
A base end side extending portion 23 with respect to a straight line L passing through the center of the collar 19 in the longitudinal direction and orthogonal to the axis of the collar 19.
By setting the inclination angle θ of D to a desired angle, the straight line L
It is possible to set the interval W from to the tip portion 23B to a desired dimension.

Therefore, even when the distance between the distal end portions 23B of the plurality of lever rods 23 is large as compared with the length dimension of the collar 19, the inclination angle of the proximal end side extending portion 23D of each lever rod 23. By properly setting and fixing θ, it is easy to provide the tips 23B at substantially equal intervals.

[0026] In the normal state, which is supported on the support shaft 15, wherein at the distal end side extending portion 23E in a state inclined so as to direct the rear direction, the directivity direction of the distal end portion side extending portion 23E Can be set in a desired direction by appropriately setting the bending angle of the bent portion 23C.

A base plate 27 enlarged rearward is integrally attached to a lower portion of the rotary bracket 13, and a lever cover 29 is detachably attached to the base plate 27 via bolts or the like. The lever cover 29 is provided with an elongated hole 31 through which the operation levers 17A to 17D can be inserted, and a bellows 33 is attached to a portion of each elongated hole 31. Then, the knob 25 in the distal end portion of the operating levers 17A~17D that issued bellows 33 or et collision <br/> is attached.

The tip ends of the links 21 of the operation levers 17A to 17D are located above the spools 7S that are vertically movable in the control valves 7A to 7D, and the tip ends of the links 21. The upper ends of the intermediate links 37 are pivotally connected to each other via pins 35. Further, the lower end of each intermediate link 37 is pivotally connected via a pin 39 to the upper end of each spool 7S provided on the control valves 7A to 7D so as to be vertically movable. Therefore, the support shaft 15 and the front
The pin 35 has a distance substantially equal to the length of the link 21.
Close to.

When the rotary bracket 13 is rotated up and down with the pivot 11 as a fulcrum, the spools 7S of the control valves 7A to 7D are not vertically moved so that the operation levers 17A to 17A. Each link of 17D 2
It is configured such that the axis of each pin 35 connecting 1 and each intermediate link 37 and the axis of the pivot 11 are substantially coincident with each other.

In other words, each operation lever 17A to 17A
When D is in the neutral position, the axis of the respective pin 35 to the axis of the pivot 11 is to be located so as to coincide substantially.

In the above construction, when the knobs 25 are gripped and the operation levers 17A to 17D are rotated around the support shaft 15, the operation levers 17A to 17D are moved.
The spools 7S of the control valves 7A to 7D are operated up and down via the links 21 and the intermediate link 37 provided for the control valves 7A to 7D to operate appropriate hydraulic equipment such as hydraulic cylinders corresponding to the control valves 7A to 7D. It is controlled.

[0032] When rotating the rotary bracket 13 in the vertical direction by supporting the operating lever 1. 7A to 1 7D includes a rotational center of the rotary bracket 13, the operating levers 1. 7A to
Since the shaft center of the pin 35 connecting the 17D link 21 and the intermediate link 37 coincides with each other, when the rotary bracket 13 is rotated up and down, each spool 7S in each control valve 7A to 7D is operated. There is no such thing.

In the above description, each link 21 of each operation lever 17A to 17D and each control valve 7A to 7D.
Although the configuration in which the intermediate link 37 is interposed between each spool 7S of D is described, the upper end of each spool 7S and each link 21 are configured by the configuration in which each spool 7S largely protrudes upward. It is also possible to connect via the pin 35. In this case, each spool 7
It is desirable to provide a long hole in the engaging portion of the link 21 and the pin 35, for example, so that the vertical movement of S and the rotation of each link 21 can be performed without problems.

According to the above construction, the intermediate link 37 is omitted, and the control levers 17A to 17D are used to control the control valves 7A to 7D.
Each spool 7S of 7D can be directly operated, the structure can be simplified, and the link 21 is short, so that the rotary bracket 13 can be easily made compact, and the overall structure can be made compact. It can be realized.

Further, according to the structure of this embodiment as described above, the lever rod of the operating lever can be bent at one place, and the structure of the lever rod is simple and its manufacture is easy. Is.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a valve operating lever device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation lever.

FIG. 3 is an explanatory diagram showing a conventional configuration.

[Explanation of symbols]

1 Valve operating lever device 5 Control valve mounting member 7A-7D control valve 7S spool 9 bracket 11 Axis 13 rotation bracket 15 Support shaft 17 Operation lever 19 colors 21 links 23 Lever rod 23A base end 23B tip 23C bent part 23D Base end side extension part 23E Extension part on the tip side 35 pin 37 Intermediate link

Claims (4)

(57) [Claims] 1. A control valve mounting member, to which a plurality of control valves for controlling hydraulic equipment in a cargo handling vehicle are mounted, comprising a rotary bracket rotatably supporting a plurality of operation levers for operating the control valve. In a configuration in which the control valve is mounted rotatably up and down about an axis that coincides with the axis of a pivot provided at the upper end of the spool of each control valve,
The links for operating the
The center of rotation of the rotating bracket and the center of rotation of each of the operating levers are provided at a distance approximately equal to the length of the link.
A valve operating lever device in a cargo handling vehicle, which is close to a separation . 2. A bracket is provided on an upper portion of a control valve mounting member for mounting a plurality of control valves for controlling hydraulic equipment in a cargo handling vehicle, and the control is provided on a rotary bracket rotatably supported by the bracket. A plurality of operating levers for operating the valves are provided so as to be vertically rotatable, and links provided integrally with the operating levers and intermediate links connected to spools of the control valves are pivotally connected. A valve in a cargo handling vehicle, wherein a center of rotation of the rotary bracket and a center of a connecting portion of each link and each intermediate link are aligned with each other when the rotary bracket is vertically rotated. Operation lever device. 3. The invention according to claim 1 or 2,
The operating lever has a collar that is fitted and supported by a support shaft, a link integrally provided on the collar, and a lever rod integrally provided on the collar on the opposite side of the link. A valve operating lever device in a cargo handling vehicle, comprising a bent portion at one location between a base end portion and a tip end portion fixed to the collar. 4. The invention according to claim 3, wherein a portion from the base end portion of the lever rod to the bent portion is inclined with respect to a straight line orthogonal to an axis of the collar, and a portion from the bent portion to the tip end portion is inclined. A valve operating lever device in a cargo handling vehicle, which is substantially parallel to a straight line orthogonal to the axis of the collar.