JPH0646952Y2 - Remote control device for battery forklift - Google Patents

Description

TECHNICAL FIELD The present invention relates to a remote control device for a battery forklift, and more particularly to an improvement of a remote lift control device operated on a workbench that moves up and down along a mast. .

[Prior Art] Generally, in a battery forklift, as shown in FIG. 5, a flat pallet-like workbench b is fixed to a pair of left and right forks a by a locking tool c, and an operator who rides on this workbench b. Is an operating lever e arranged at the center of the backrest d
The control mechanism f for performing the remote lift operation can be operated via the. The control mechanism f is composed of a control valve for supplying / discharging hydraulic oil to / from the lift cylinder in conjunction with the operating lever e, a limit switch for operating a hydraulic pump and a motor, and connecting pipes, wirings and cover parts for these. In order to utilize the extra air space existing between the left and right masts, the backrest d is arranged so as to extend rearward at the center thereof.

[Problems to be Solved by the Invention] In the conventional remote control device as described above, due to the size and shape of the cargo to be handled, sometimes the load is concealed in front of the operation lever located in the central portion, and This makes it difficult or impossible to operate the lever. Of course, in preparation for such a situation from the beginning, it is possible to shift the remote operation device including the operation lever from the central portion of the backrest to reduce the influence of the cargo. However, since the total volume occupied by the control mechanism is inevitably determined from the respective volumes of the above-mentioned components, the depth of the control mechanism inevitably causes the backrest to overhang considerably from the back surface, and the backrest is positioned close to the rear. The left and right pairs of inner and outer masts are erected, and mutual interference between these members effectively prevents the remote control device from being relocated. Needless to say again, if the backrest is moved forward by that amount while avoiding such interference, the lost load naturally changes, and the load allowable load, which is an essential function of the lift, decreases. .

The present invention has a technical problem to be solved in that the control mechanism is arranged in the central portion of the backrest and the operation positions are substantially unevenly distributed or plural.

[Means for Solving the Problems] In order to solve the above problems, the present invention arranges a control mechanism for performing remote operation on a workbench that moves up and down along a mast at the center of a backrest, and controls the control mechanism. A configuration is adopted in which the pivot is extended in the lateral direction and the operation lever is arranged at the extension end.

As an embodiment of the present invention, the pivot can extend from the control mechanism in either the left or right direction, or both,
Therefore, the operating lever may be only one provided at one of the extending ends, or may be two or three including the conventional operating lever located at the central portion.

As a more preferred embodiment of the present invention, two or three operation levers are configured to be detachable and replaceable with each other, and the multi-position operation of the control mechanism can be performed only by changing one operation lever. It can also be possible.

[Operation] Therefore, according to the device of the present invention, even if the operation lever at a specific position becomes inoperable due to the obstruction of the load, or the loading position is unevenly distributed due to the load, the worker does not By selecting the operation lever or the operation position at any time, the control mechanism can always be operated without trouble.

In particular, in the case where the multiple operating levers are configured to be removable and replaceable with each other, the single operating lever can be operated freely regardless of the change in the operating position, so that an unused operating lever that merely idles can be used. It is also released from the fear of malfunctions that do not remain on the pivot and are easily caused by these floating operation levers interfering with the load.

[Embodiment] A first embodiment of the present invention will be described below with reference to the drawings.

1 to 3, 10 is a pair of outer masts, 12 is a pair of inner masts, and 14 is a lift bracket that moves up and down along the inner mast 12, and a finger bar 16 connected to the front surface of the lift bracket 14 is shown. A pair of forks 18 and a backrest 20 are attached to the fork, and a flat work table S is attached to the forks 18.

It should be noted that the respective rollers that mediate the vertical movement of the inner mast 12 and the lift bracket 14 are not shown.

As is apparent from FIG. 5, the backrest 20 is reinforced by a plurality of crosspiece members arranged vertically and horizontally, and a central portion of the backrest 20 is controlled by a base plate 22 and a cover plate 24 shown in FIG. A control room 26 is formed to house the mechanism.
A pivot 30 is rotatably supported by a double-walled first bracket 28 that is fixed to and protrudes from the inner wall of the base plate 22, and the pivot 30 is further extended in the lateral direction, and the extension end thereof is a back end. Rest
The second single-wall type that is similarly fixed and protrudes near the left end of 20
It is supported by a bracket 32 (Fig. 3). A first lever boss 34 fastened to a pivot 30 is interposed between the multiple walls of the first bracket 28, and a cam surface formed on the first lever boss 34 contacts an operating terminal 36a of a limit switch 36, On the other hand, the protruding portion extending in the forward direction is articulated via a link 38 with a spool 42 incorporated in the control valve 40. A first operating lever 46a and a second operating lever 46b are connected to the first lever boss 34 and the simple second lever boss 44 fastened to the extending end of the pivot 30, respectively. Numerals 48 and 50 are protective covers for both operation levers 46a and 46b, particularly the second operation lever including the protective cover 50.
Since 46b is not directly attached to hydraulic equipment, it occupies a small volume and can be arranged without interfering with the hose guide 52 protruding from the outer wall of the outer mast 10.

Since this embodiment is configured as described above, the workbench S
When the operator boarding the vehicle operates any of the first and second operation levers 46a and 46b arranged at the central portion or the left end of the backrest 20, the pivot shaft 30 and the first lever boss 34 rotate equally. Therefore, for example, when the operator pulls the second operation lever 46b in the P direction from the N position when the operator is obstructed by the load loaded on the central portion of the workbench S, the interlocking pivot 30, the first lever boss 3
4. The spool 42 is pushed downward via the link 38, and the hydraulic circuit in the control valve 40 is switched to the upward direction.
On the other hand, the rotation of the first lever boss 34 turns on the limit switch 36 via the cam surface to simultaneously start the hydraulic pump and the motor (not shown), so that the hydraulic oil also passes through the control valve 40 from the hydraulic hose (not shown). Then, it is supplied to the lift cylinder, and the work platform S rises together with the platform element. It should be noted that the second operation lever 46b is moved to the N position at the predetermined lifting position.
After returning to the position, the hydraulic pump and the motor are stopped by the OFF operation of the limit switch 36, and the hydraulic circuit is blocked. When the second operation lever 46b is pushed in the opposite direction from the N position to the O direction, the spool 42 is pulled upward via the above-mentioned interlocking system and the hydraulic circuit of the control valve 40 is switched to the downward direction, so that the hydraulic oil is It flows back from the lift cylinder to the oil tank through the control valve 40, and the work platform S descends together with the load platform element.

In this embodiment, the pivot 30 extends in the left direction (right direction in the drawing), and the operation lever is the second operation lever 46a located at the center and the second operation lever 46b located at the left extended end. However, it is also possible to symmetrically extend the pivot shaft 30 in the right direction and attach a third operation lever of the same shape to the extending end. Further, in consideration of operability, these operation levers may be designed such that the handle portion thereof protrudes from the front surface of the backrest 20 especially when the operation lever is operated freely. Therefore, since the floating lever, which is often neglected without being actually operated, tends to cause a malfunction due to interference with the load, the central operation lever, which has the highest frequency of interference with the load, should be omitted from the beginning. It can also be configured.

Next, a second embodiment of the present invention will be described. In this embodiment, as shown in FIG. 4, the uniformized operation lever 46 can be freely attached / detached to / from each lever boss 34, 44. That is, a hole 54 is formed in the upper portion of each lever boss 34, 44 to allow the operation lever 46 to be fitted therein, and a U-shaped positioning groove 56 is formed in the upper end surface in the radial direction. Reference numeral 58 is a parallel pin that is press-fitted into a required position below the operating lever 46, and is used for the positioning groove 56.
By matching with, the relative phase of the operating lever 46 with respect to the lever bosses 34, 44 is secured. 60 is the control lever
The outer peripheral surface is knurled with a bottomed cylindrical cap loosely fitted in 46, and the cap 60 is attached to the lever boss 34,
The operation lever 46 is fixed to the lever bosses 34, 44 via the parallel pin 58 by screwing into the 44.

In the present embodiment, as described above, the operation lever 46 can be attached / detached to / from the respective lever bosses 34 and 44 very easily, so that the multi-position operation of the control mechanism can be performed by a single operation 46. It is possible to skillfully eliminate the above-mentioned idle lever which is only idle.

[Advantages of the Invention] As described above in detail, the present invention arranges the control mechanism for remote operation in the center of the backrest with a space in the mounting space, and extends only the pivot of the control mechanism in the lateral direction. Since the operation lever is installed at the extension end of the operation lever, the operation lever can be unevenly distributed or duplicated without changing the lost load, and the operation lever can be optionally selected according to the machine. Can be used.

In particular, in the case where the operation levers that are double mounted are configured to be removable and replaceable, there is no malfunction due to interference with the load due to the elimination of the floating operation lever, and efficient multi-positioning using only one operation lever The operation can be performed.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
Fig. 2 is a sectional side view taken along the line II-II, Fig. 3 is a sectional side view taken along the line III-III in Fig. 1, Fig. 4 is a longitudinal sectional view showing the attachment / detachment structure of the operating lever, and Fig. 5 shows a conventional carrier section. It is a perspective view shown. 10 …… Outer mast, 12 …… Inner mast 18 …… Forks, 20 …… Backrest 30 …… Axis, 46 …… Operating lever 46a …… First operating lever 46b …… Second operating lever

Claims (1)

[Scope of utility model registration request] 1. A control mechanism for performing remote control on a workbench that moves up and down along a mast is arranged in a central portion of a backrest, and a pivot axis of the control mechanism is laterally extended to extend the control mechanism. A remote control device for a battery forklift, characterized in that an operation lever is arranged at the end.