JP2001329572A - Gate lock lever jumping-up mechanism for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation lever jumping-up mechanism capable of securing the alighting/boarding passage of an operator by using a simple and inexpensive mechanism. SOLUTION: The operation lever of a work machine is provided rotatably in the longitudinal direction. A coupling member coupled with the operation lever is provided on a gate lock lever so that the work machine is locked and the operation lever is tilted backward to expand the alighting/boarding passage when the gate lock lever is jumped up. The coupling member is coupled with the operation lever to tilt the operation lever backward during the jumping-up of the gate lock lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a gate lock lever which locks a working machine when a construction machine is disembarked to ensure safety and secures a boarding passage for facilitating getting on and off.

[0002]

2. Description of the Related Art Conventionally, a console box (also referred to as a control box) provided with an operating device including an operating lever of a construction machine is arranged near a cockpit, for example, on both sides of the cockpit. Therefore, when the operator gets on and off the cockpit, the console box (particularly, the position of the operation lever) hinders getting on and off. Therefore, a system in which an operator jumps up and tilts the console box when getting on the vehicle and returns the console box to the original position after riding the vehicle so as to be able to steer has been adopted. In addition, a device that locks the working machine so that the working machine does not suddenly start to move even if the operator accidentally touches the operating lever or the like when getting on or off the board is employed in the system.

[0003] Further, even when the operator gets off the vehicle, it is dangerous if someone touches the operation lever or the like and the work machine starts moving. Therefore, it is necessary to lock the work machine even when the operator is absent. However, even if the locking device is provided to prevent danger, if the operator forgets to lock and gets off the vehicle, danger cannot be prevented. Therefore, a get-off shut-off lever (hereinafter referred to as "gate lock lever") is provided on the side of the console box. Alternatively, a device is provided in which a limit switch or the like is provided on the gate lock lever, and when the gate lock lever is flipped up, the control system of the work machine is turned off by an operation of the limit switch to lock the work machine in an inoperable state.

FIG. 5 is a publication of Japanese Patent Application Laid-Open No. Hei 8-199627.
1 shows an example of a conventional device using a gate lock lever disclosed in Japanese Patent Application Laid-Open No. H11-157, (1995). 7 and 8 (A) and 8 (B) show examples of a conventional apparatus. Hereinafter, this conventional apparatus will be briefly described. In the figure, the console box 52 forms a trapezoidal four-node link between a link 53 and a link 54 having different lengths between the console box 52 and a slide base 51 provided on a chassis. Further, as a means for driving the inequality four-node link, a plate 55 having a guide groove on the slide base 51 side is used.
Is established. A roller 56 that slides along the guide groove is provided on the gate lock lever 57. Further, one end of the gate lock lever 57 is rotatably fixed to the console box 52 by pin connection. A protruding piece is provided at this one end, and a tension spring 58 is provided between the protruding piece and the console box 52 to urge the gate lock lever 57 downward.

The middle portion of the link 54 and the console box 52 are connected by a compression spring 59 to urge the console box 52 upward, and furthermore, loosen the vicinity of the base end of the gate lock lever 57 and the center of the link 53. They are connected by a spring 60. With the above configuration, when the operator pulls up the gate lock lever 57 when getting off the construction machine, the roller 56 is disengaged from the lower lock portion 55a as shown in FIG.
Further, when the gate lock lever 57 is flipped up, a lock device (not shown) is operated, and the operation of the work machine is locked. Further, when the gate lock lever 57 is flipped up,
As shown in FIG. 8B, the console box 52 moves backward while tilting. Finally, the roller 56 is engaged with the upper lock portion 55b, and the console box 52 is locked in this state. When the gate lock lever 57 is pushed down, the operation is performed in the reverse order.

[0006]

As described above, as described above,
In the conventional apparatus, the console box is tilted rearward or moved rearward to secure a space for an operator's getting on / off passage. However, a complex and robust mechanism was required to tilt the entire console box. There is a problem that the mechanism is complicated, the mechanism is liable to break down, and it is necessary to manufacture it ruggedly.

The present invention has been made under the above-mentioned background, and the console box and the operation lever are formed in an appropriate shape, and only the operation lever is tilted backward to secure a passage for the operator to get on and off. An object of the present invention is to provide an operation lever flip-up mechanism that can be used.

[0008]

The present invention employs the following means to solve the above-mentioned problems. That is, claim 1
According to the invention described above, the operating lever of the working machine is provided so as to be rotatable in the front-rear direction, and when the gate lock lever is flipped up, the working machine is locked and the operating lever is tilted rearward so as to enlarge the entrance passage. It is characterized in that means are provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the tilting means is provided with an engaging member for engaging the operation lever on the gate lock lever, and the gate lock lever is flipped up. The method is characterized in that the engaging member engages with the operating lever on the way to tilt the operating lever backward.

According to a third aspect of the present invention, in the first aspect of the present invention, the tilting means suspends a wire between the operation lever and the gate lock lever and jumps up the gate lock lever. The operation lever is tilted by pulling the wire.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the tilt locking means is provided so that the operating lever does not tilt when the gate lock lever is not flipped up. It is characterized by having been provided.

[0012]

FIG. 1 shows a principle diagram of an embodiment of the present invention. 2 to 5 show partial explanatory views of the embodiment. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, an operating device for a working machine including a remote control valve and the like shown in FIG. 3 is provided in a console box 11, and an operating lever 12 is connected to this operating device. The operation lever 12 is provided with a base end (or in the middle of the operation lever 12) rotatably, and the tip of the grip portion 12a of the operation lever 12 rotates from the position B1 to the position B2. The gate lock lever 13 is rotatably provided on the outer wall of the console box 11.

When the gate lock lever 13 is lowered (in the position indicated by the dashed line in FIG. 1), the position A of the obstacle (for example, the traveling lever) in front of the gate lock lever 13 and the operation lever 12 are adjusted.
S1 between the tip position B1 of the grip portion 12a
Is small and the operator cannot pass through the space S1. When the gate lock lever 13 is flipped up (in the case of the solid line in the figure), the operation lever 12 is also flipped up at the same time, the space S1 is extended to the space S2, and the operator passes the space S2 and can get on and off the console box 11 so as to be able to get on and off. The operation lever 12 is arranged and configured. In addition,
The base end of the gate lock lever 13 may be rotatably provided on a bracket (not shown) fixed to the floor.

FIG. 2 is a diagram showing an example of the structure of the lock means for locking the working machine in the present embodiment. In FIG. 2, a horizontal shaft 13a is provided at the base end of the gate lock lever 13.
The horizontal shaft 13a is rotatably fixed by bosses 15a and 15b provided on the console box 11. A projecting piece 16 is fixed to the horizontal shaft 13a. The projecting piece 16 can be engaged with the limit switch 17. When the gate lock lever 13 is lowered, the limit switch 17 is turned on (or off). , Wiring 18
The work machine (not shown) enters an operable state in response to the ON signal. Conversely, when the gate lock lever 13 is raised, the limit switch 17 is turned off (or on) and the wiring 18
, The work machine (not shown) becomes inoperable.

An engagement member 19 is fixedly provided in the middle of the gate lock lever 13, and
Is raised, the engaging member 19 comes into contact with the lock button 20, and when the gate lock lever 13 is further raised, the operation lever 12 is tilted rearward to secure the getting on / off space S2. 3 to 5 show an embodiment of the tilting means and the tilt locking means. As shown in FIG. 3, the operation lever 12 is
1, it is rotatably connected to the operation end 23 of the remote control valve 22. The operation signal is output to a pilot port of a direction switching control valve (not shown) via a pilot oil passage 24. FIG. 4 shows an embodiment of the tilt locking means.

Referring to FIG. 4, a ring 25 is fitted to the rotating portion of the operation lever 12 so as to be slidable in the axial direction. A groove 2 for generating a sliding force in the axial direction is formed in the ring 25.
6 are provided diagonally. The groove 26 and the pin 27 provided on the lock button 20 are engaged, and when the lock button 20 is pushed rightward, the pin 27 also moves rightward,
The ring 25 is lifted upward to release the locked state between the ring 25 and the operation end portion 23, and the operation lever 12 is turned clockwise. The lock button 2
It is configured to return to the original position by the spring 28 at 0. When the lock button 20 is further pressed rightward, the operation lever 12 is tilted to the state shown by the solid line in FIG.

In the above embodiment, when the gate lock lever 13 is flipped clockwise (upward), the engaging member 19 provided on the gate lock lever 13 collides with the lock button 20. When the ring 25 is lifted to enable the operation lever 12 to be tilted, and when the gate lock lever 13 is further flipped up, the operation lever 12 is also tilted, so that the operator's getting on and off space S2 can be secured.
When the gate lock lever 13 is returned to the original position, the gate lock lever 13 is restored to the initial state in the reverse order, and the operation of the work implement by the operation lever 12 becomes possible.

FIG. 5 shows another embodiment of the tilt locking means. Note that the same components as those in the above-described embodiment (FIG. 4) are assigned the same reference numerals and description thereof will be omitted. In FIG. 5, a U-shaped lock piece 29 is provided at the rear end of the lock button 20, and protrusions at both ends of the lock piece 29 are provided so as to be able to engage with the lock holes 30. In the state shown by the solid line in the drawing, the lock state is established, and when the lock button 20 is pushed rightward and becomes the state shown by the dotted line, the state is unlocked and the operation lever 12 is tilted clockwise.

FIG. 6 shows another embodiment of the tilting means and the tilt locking means. These means are housed in a console box 11 to improve the appearance. 6, the same components as those in the above-described embodiment (FIGS. 2 to 5) are denoted by the same reference numerals, and description thereof will be omitted. Gate lock lever 1
Bar-shaped projections 30, 31, and 32 are provided on the third horizontal shaft 13a. In addition, these protruding pieces 30 to 31 are fixed so that the mounting angle can be adjusted. A wire 33 is connected to the tip of the projecting piece 30, and the other end of the wire 33 is connected to the operating lever 1.
2 is connected to a substantially central portion. The operation lever 12 is rotatably connected to an operation end 23 by a pin 21 and is urged in a counterclockwise direction by a spring (not shown).

A wire 34 is connected to the tip of the projection 32, and the other end of the wire 34 is connected to a lock pin 35. The lock pin 35 is urged upward by a spring (not shown), and locks the tilt of the operation lever 12 in this state. When the wire 34 is pulled, the lock is released, and the wire 34 can be tilted. Further, the protruding piece 31 is in pressure contact with the operating portion of the limit switch 17, whereby the limit switch 17 is in the ON state, and the working machine can be operated.

In the above embodiment, when the gate lock lever 13 is flipped clockwise, the limit switch 17 is turned off and the lock pin 35 is unlocked. When the user continues to jump up, the operation lever 12 is tilted clockwise. As a result, as shown in FIG. 1, the getting-in / out space S2 can be secured and the getting-in / out can be performed. Conversely, when the gate lock lever 13 is turned counterclockwise, the gate lock lever 13 returns to the original state in the reverse order to enable the operation of the work implement.

As described in the above embodiment, only the operation lever, not the entire console box, is tilted, so that the operation force of the gate lock lever is small.
In addition, since the mechanism is simple and the strength does not need to be increased, there is obtained an advantage that the manufacturing cost is low and the number of failures is small.

The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the examples, and changes in design and the like may be made without departing from the gist of the present invention. Even if there is, it is included in the present invention. For example, the tilting means and the tilt locking means are not limited to those described above.

[0024]

As described above, according to the structure of the present invention, only the operation lever is tilted, so that the operation force of the gate lock lever is small, the mechanism is simple, and the strength must be increased. Therefore, the production cost can be reduced and the effect that the number of failures is small can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration example of a lock unit that locks a working machine according to the present embodiment.

FIG. 3 shows an embodiment of a tilting means and a tilt locking means.

FIG. 4 shows details of a tilting means and a tilt locking means.

FIG. 5 shows details of another tilting means and tilt locking means.

FIG. 6 shows an embodiment of another tilting means and tilt locking means.

FIG. 7 shows a conventional locking device.

FIG. 8 is an explanatory diagram of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Console box 12 Operation lever 13 Gate lock lever 17 Limit switch 19 Engagement member 20 Lock button 22 Remote control valve 25 Ring (tilt lock means) 29 Lock piece (tilt lock means) 35 Lock pin (tilt lock means) S1 Space (during driving) S2 Space for boarding / alighting passage (when getting on / off)

Claims (4)

[Claims] 1. A tilting mechanism for providing a control lever of a work machine so as to be rotatable in a front-rear direction, locking the work machine when a gate lock lever is flipped up, and tilting the control lever backward so as to enlarge a boarding passage. A gate lock lever flip-up mechanism for a construction machine, characterized by comprising means. 2. The tilting means according to claim 1, wherein the gate lock lever includes an engagement member that engages with the operation lever, and the engagement member engages with the operation lever while the gate lock lever is being flipped up. The gate lock lever flip-up mechanism for a construction machine according to claim 1, wherein the operation lever is tilted backward. 3. The tilting means connects a wire between the operating lever and the gate lock lever, pulls the wire when the gate lock lever is flipped up, and tilts the operating lever. 3. The gate lock lever flip-up mechanism for a construction machine according to claim 1, wherein the gate lock lever is lifted up. 4. The gate lock lever pop-up mechanism for a construction machine according to claim 1, wherein a tilt lock means is provided so that the operation lever does not tilt when the gate lock lever is not flipped up.