JPH08128075A - Operating device of construction machinery - Google Patents

Abstract

PURPOSE: To dispense with any gas cylinder as well as to aim at the promotion of low cost by installing a torsion coil spring in the peripheral part of a horizontal axis in a control box, and engaging both ends of this spring with a frame and this control box respectively. CONSTITUTION: When a torsion coil spring 17 is installed in a control box 6, first of all, this spring 17 is put in the box 6, and then a bore hole of the spring 17 and an axial hole of a horizontal axis 9 of the box 6 are concentrically set up there. Next, this horizontal axis 9 is inserted so as to pierce through both these holes, and one end of the spring 17 and the other end are hitched each on both hitching holes 18 and 19 and inserted thereinto. In the case where the box 6 is situated in a working time engaged position, the spring 17 comes to a state of being twistingly bent against the energizing force. In addition, when the box 6 is jumped up and put in the rear position in time of alighting, the spring 17 performs its torsional opening motion due to the energizing force, so that a front part of the box 6 is rotated upward. With this constitution, an operating device is compactified, through which a reduction in manufacturing cost and maintainability are well improvable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for work, which is installed near a driver's seat of a construction machine such as a hydraulic excavator.

[0002]

2. Description of the Related Art FIG. 8 is a side view of a working machine control device described in Japanese Utility Model Laid-Open No. 3-502225. In the prior art control device shown in FIG. 8, when the lever stand rotation restricting means 2 of the lever stand 1 with the control lever is released, the gas cylinder 3 extends and the lever stand 1 with the control lever is supported. It can be rotated about the shaft 4 to the rearward flip-up position.

[0003]

As shown in FIG. 8, in the conventional steering apparatus, a gas cylinder is provided inside a lever stand with a steering lever. Since the gas cylinder is a precision instrument, its manufacturing cost is high, and when the ambient temperature is high, the service life problem arises. Moreover, when mounting the gas cylinder, the base end and the rod end of the gas cylinder must be pivotally supported by pins, which makes the mounting structure complicated and expensive, and makes the lever stand more compact. I couldn't. An object of the present invention is to provide a control device that can solve the above problems.

[0004]

In a first embodiment of the present invention, a control box having a working operation lever is arranged on the side of a driver's seat, and left and right of an underframe of the driver's seat. In a control device for a construction machine that has a horizontal horizontal axis and is rotatable around the horizontal axis to the locking position during work and the rearward position when getting off the vehicle, on the outer periphery of the horizontal axis in the control box of the horizontal axis. Then, the torsion coil spring is wound, one end of the torsion coil spring is locked to the underframe and the other end is locked to the control box, and the front part of the control box is urged upward with respect to the underframe. As configured. Further, in the control device of the second embodiment of the present invention, the spiral spring spring is wound around the outer periphery of the horizontal shaft in the control box of the horizontal shaft fixed to the underframe, and one end of the spiral spring is attached to the horizontal shaft. One part of the control box and the other end are locked to the control box, and the front part of the control box is biased upward with respect to the underframe. Further, in the third embodiment of the control device of the present invention, a compression coil spring is provided below the bottom surface of the control box at the position on the front side of the horizontal axis in plan view, and the lower end of the compression coil spring is located at the underframe portion. And the front portion of the control box is biased upward by the spring force of the compression coil spring.

[0005]

According to the first embodiment of the present invention, when the torsion coil spring is mounted inside the control box, the torsion coil spring is put inside the control box, and the inner diameter hole of the torsion coil spring and the horizontal position of the control box. The shaft is positioned concentrically with the shaft hole, and the horizontal shaft is inserted so as to pass through both the holes. Then, one end and the other end of the torsion coil spring may be hooked and inserted into hooking holes formed in corresponding portions of the underframe and the control box, respectively. Then, when the control box is in the locking position during work, the torsion coil spring is in a torsion bending state against the urging force thereof, and when the control box is in the rearward position where the control box is flipped up when the vehicle is alighted, the torsion coil spring is in that position. Since it is twisted open by the biasing force, the front part of the control box can be rotated upward.

In the control device of the second embodiment of the present invention, a spiral spring spring is wound around the outer periphery of the horizontal shaft in the control box of the horizontal shaft fixed to the underframe.
One end of the mainspring is brought into contact with and locked to a hooking hole formed in the outer periphery of the horizontal shaft, and the other end is brought into contact with a plate fixed to the control box. Therefore, when the control box is in the locked position during work,
The mainspring spring is rolled up against its urging force, and when the control box is lifted up to the rear position when getting off the vehicle, the mainspring spring rewinds by the urging force, so the front part of the control box moves upward. It can be rotated.

In the control device of the third embodiment of the present invention, the compression coil spring is arranged between the bottom surface of the control box and the underframe at the position on the front side of the horizontal axis in plan view. As a result, when the control box is in the locked position during work, the compression coil spring is in a contracted state against the urging force thereof, and when the control box is in the lifted rear position when getting off the vehicle, the compression coil spring is Since the extension operation is performed by the urging force, the front portion of the control box can be rotated upward.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway side view showing a control device according to a first embodiment of the present invention. In the figure, 5 (indicated by phantom lines) is a driver's seat, 6 is a control box having a work control lever 7, 8 is a lower frame of the driver's seat 5, and 9
Is a horizontal axis in the left-right direction that penetrates the underframe 8 and the control box 6, 10 is a control box rotation restricting means, 11 is a lock / release lever of the control box rotation restricting means 10, 12 is a rod, 13 Is a hook, 14
Is a hook engaging pin fixed to the underframe 8 side, 15 is a bracket fixed to the side of the underframe 8, 16 is a plate standing on the bracket 15, and 17 is a torsion coil spring. When the locking / releasing lever 11 is operated to the a position,
As shown in FIG. 1, the hook 13 engages with the hook engaging pin 14, and the control box 6 is fixed in the locked position during work. FIG. 2 is a cross-sectional view of a main part taken along line AA of FIG. FIG. 3 is a partially cutaway side view showing a state in which the control box 6 in FIG. As shown in FIG. 3, when the locking / releasing lever 11 is operated to the low position, the engagement of the hook 13 with the hook engaging pin 14 is released.

Next, the structure of the first embodiment of the control device of the present invention will be described with reference to FIGS. In the present invention, the torsion coil spring 17 is wound along the outer periphery of the horizontal shaft 9 in the control box 6 of the horizontal shaft 9, and one end of the torsion coil spring 17 is provided with a hooking hole of the plate 16 on the underframe 8 side. 18 (shown in FIGS. 1 to 3) and the other end is locked in the hooking hole 19 of the control box 6 to urge the front portion of the control box 6 upward with respect to the underframe 8. As configured.

Next, the operation of the first embodiment of the steering apparatus of the present invention will be described. In the present invention, when the torsion coil spring 17 is mounted inside the control box 6, the torsion coil spring 17 is put inside the control box 6, and the inner diameter hole of the torsion coil spring 17 and the horizontal shaft 9 of the control box 6 are used. Concentric with the shaft hole,
The horizontal shaft 9 is inserted so as to penetrate the both holes. Then, one end and the other end of the torsion coil spring 17 may be hooked and inserted into the hooking holes 18 on the underframe 8 side and the hooking holes 19 on the control box 6 side, respectively. When the control box 6 is in the working locking position (position a in FIG. 1), the torsion coil spring 17 is used.
Is in a twisted and bent state against its urging force, and when the control box 6 is lifted up to the rearward position (the position of symbol b in FIG. 3), the torsion coil spring 17 is twisted and opened by the urging force. Therefore, the front portion of the control box 6 can be rotated upward.

Next, FIG. 4 is a cross-sectional view of the essential parts of the second embodiment of the control device of the present invention. In the figure, 6a is a control box, 8a is a lower frame of a driver's seat (not shown), 20 is a bearing mounted on the frame 8a and fixedly supporting a horizontal shaft 9a, and 21 is a round wire. A spiral spring, a square wire, or a strip spring, 22 is a plate fixed to the inside of the control box 6a. FIG. 5 shows B- of FIG.
It is a figure which shows the mainspring spring 21 seen from B. Next, the configuration and operation of the second embodiment control device of the present invention will be described with reference to FIGS. According to the present invention, the spiral spring 21 is attached to the outer periphery of the horizontal shaft 9a in the control box 6a of the horizontal shaft 9a fixed to the bearing 20 of the underframe 8a.
The main shaft spring 21 and the horizontal shaft 9
A hooking hole 23 (shown in FIG. 5) formed in the outer peripheral portion of a.
In addition, the other end is brought into contact with and locked to the plate 22 fixed in the control box 6a. Therefore, when the control box 6a is in the working locking position (not shown, the working locking position similar to that of the first embodiment), the mainspring 21 is wound up against its urging force. And the control box 6a
Is set to the rearward flip-up position when getting off (not shown, but the rearward flip-up position similar to that in the first embodiment),
Since the mainspring 21 is rewound by its urging force, the front portion of the control box 6a can be rotated upward.

Next, FIG. 6 is a partially cutaway side view showing a control device according to a third embodiment of the present invention. In the figure, the same components as those of the control device of the first embodiment are designated by the same reference numerals. 6b is a control box, 24 is a bracket fitting fixed to the side of the underframe 8b, 25 is a compression coil spring, 26 is an abutment boss fitted on the upper end of the compression coil spring 25, and 27 is a control box 6b. A metal fitting fixed to the bottom portion, and 9b is a horizontal axis. Figure 7
FIG. 7 is a cross-sectional view of the main part seen from CC of FIG. 6, but the control box 6b is in the locking position during work. Next, FIG. 6 shows the configuration and operation of the third embodiment of the control device of the present invention.
7 and FIG. In the present invention, the horizontal axis 9
A compression coil spring 25 is arranged at a position on the front side of b between the contact metal fitting 27 on the bottom surface of the control box 6b and the bracket metal fitting 24 fixed to the side of the underframe 8b. As a result, when the control box 6b is in the locking position during work, the compression coil spring 25 is in a contracted state against the urging force thereof, and when the control box 6b is in the rearward position where the control box 6b is lifted up, the compression coil spring 25 is pressed. Since the spring 25 is extended by the biasing force, the front portion of the control box 6b can be rotated upward. In this embodiment, the conical compression coil spring 25 is used, but it is also possible to use an unillustrated bamboo spring or the like.

[0013]

In the first embodiment of the control apparatus of the present invention, the torsion coil spring is wound along the outer periphery of the horizontal axis in the control box of the horizontal axis, and one end of the torsion coil spring is used as the underframe. And the other end was locked in the control box. Further, in the second embodiment, a spiral spring spring is wound around the outer periphery of the horizontal shaft in the control box of the horizontal shaft fixed to the underframe, and one end of the spiral spring is attached to one part of the horizontal shaft. And the other end was locked in the control box. Further, in the third embodiment, a compression coil spring is arranged between the bottom surface of the control box and the underframe at a position on the front side of the horizontal axis in plan view. As a result, when the control box is lifted up to the rear position when getting off the vehicle, the front portion of the control box can be rotated upward by the biasing force of the torsion coil spring, the mainspring spring, the compression coil spring and the like. The spring is temperature resistant, has a semi-permanent service life, and is very inexpensive. In the present invention, since the gas cylinder used in the prior art is not necessary, the structure is simple and the control device can be made compact. Therefore, according to the present invention, the manufacturing cost of the control device can be reduced and the maintainability can be improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a control device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part viewed from AA in FIG.

FIG. 3 is a partially cutaway side view showing an embodiment of a control box in FIG.

FIG. 4 is a cross-sectional view of a main part of a control device for a second embodiment of the present invention.

5 is a diagram showing the mainspring as seen from BB in FIG. 4. FIG.

FIG. 6 is a partially cutaway side view showing a control device according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part viewed from CC of FIG.

FIG. 8 is a side view of a control device according to an embodiment of the prior art.

[Explanation of symbols]

 5 Driver's seat 6, 6a, 6b Control box 7 Operating lever 8, 8a, 8b Underframe 9, 9a, 9b Horizontal shaft 10 Control box rotation restricting means 11 Locking / releasing lever 15 Bracket 17 Torsion coil spring 18 , 19, 23 Hooking hole 21 Mainspring 25 Compression coil spring

Claims (3)

[Claims] 1. A control box equipped with a work operation lever is arranged laterally of a driver's seat, and a horizontal frame in the left-right direction is provided in an underframe of the driver's seat, and the horizontal axis is used as a center during work. In a control device for a construction machine, which is rotatable to the locking position and the rearward position that can be lifted up when getting off the vehicle, a torsion coil spring is wound along the outer periphery of the horizontal shaft in the control box of the horizontal shaft, and the torsion coil spring A control device for a construction machine, characterized in that one end is locked to the underframe and the other end is locked to the control box, and the front part of the control box is biased upward with respect to the underframe. 2. A control box provided with a work operation lever is arranged laterally of a driver's seat, and a horizontal frame in the left-right direction is provided in an underframe of the driver's seat. In a control device for a construction machine that is rotatable to the locking position and the rearward position that can be lifted up when getting off the vehicle, a spiral spring spring is wound around the outer periphery of the horizontal shaft in the control box of the horizontal shaft that is fixed to the underframe. It is characterized in that one end of the mainspring is locked to one part of the horizontal axis and the other end is locked to the control box, and the front part of the control box is biased upward with respect to the underframe. Control equipment for construction machinery. 3. A control box equipped with a work operation lever is arranged laterally of the driver's seat, and a horizontal frame in the left-right direction is provided on the underframe of the driver's seat at the time of working around the horizontal shaft. In a control device for a construction machine that is rotatable to the locking position and the rearward position that can be lifted up when getting off the vehicle, a compression coil spring is provided below the bottom surface of the control box at the front side of the horizontal axis in plan view A control device for a construction machine, characterized in that a lower end portion of a coil spring is locked to a portion of the underframe, and a front portion of a control box is biased upward by a spring force of the compression coil spring.