JP2000282730A - Slide door lock device of construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide door lock device of construction machinery capable of reducing and economizing a space. SOLUTION: A slide door lock device 6 of the construction machinery is equipped with an outer handle 7 provided to the outside of a slide door 1, an inner handle 8 provided to the inside thereof and a lock mechanism 9 operated by the handles 7 and 8. It is also equipped with an input rod 11 connected to the outer handle 7 side, an output rod 12 connected to the lock mechanism side 9, a middle plate connecting the input rod 11 and the output rod 12 and the inner handle 8 rotating the middle plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide door lock device for a construction machine, which is mounted on a slide door for getting on and off of a cab of a construction machine such as a hydraulic shovel and locks and unlocks the door.

[0002]

2. Description of the Related Art A sliding door for getting on and off a driver's cab of a construction machine such as a hydraulic excavator switches an operating force of an outer handle or an inner handle between a state where it is transmitted to a lock mechanism and a state where it is not transmitted. Is provided with a sliding door lock device for locking and unlocking the door.

[0003] As this kind of slide door lock device,
The one shown in FIG. 2 is known. As shown in the figure, a slide door a for getting on and off the operator's cab of the construction machine includes a frame part b, a window part c, and a beam part d, and is slid in the direction of arrow g by operating the outer handle e or the inner handle f. Is what is done. The slide door lock device h is accommodated in the crosspiece d of the slide door a. The sliding door lock device h includes an outer handle e provided outside the sliding door a and an inner handle f provided inside.
And a lock mechanism i operated by each handle e, f
And

More specifically, the slide door lock device h is
An intermediate portion including a first input rod j connected to the outer handle e, a second input rod k connected to the inner handle f, and a link plate connected to the first and second input rods j and k. A mechanism l, an output rod m connecting the intermediate mechanism l and the lock mechanism i, and transmitting the operation of the outer handle e to the lock mechanism i via the first input rod j, and the operation of the inner handle f 2 input rod k
The lock mechanism i is switched between a locked state and an unlocked state by transmitting the information to the lock mechanism i via the.

[0005]

However, in the sliding door lock device h, a route (first input rod j) for transmitting the operation of the outer handle e to the intermediate mechanism l,
Since the route (the second input rod k) for transmitting the operation of the inner handle f to the intermediate mechanism l is arranged side by side, the accommodation space for them must be increased in the juxtaposition direction.
Therefore, there is a problem that the cross section d for accommodating them becomes thick and the field of view from the cab becomes narrow. Further, it was practically impossible to abolish the crosspiece d and accommodate the sliding door lock device h in the frame b.

SUMMARY OF THE INVENTION An object of the present invention, which has been made in view of the above circumstances, is to reduce the operating force of an outer handle and an inner handle and to improve the visibility by reducing the size and space of the apparatus. A locking device is provided.

[0007]

To achieve the above object, the present invention provides an outer handle provided outside a sliding door, an inner handle provided inside, and a lock mechanism operated by each handle. A sliding door lock device for a construction machine, comprising: an input rod connected to the outer handle, an output rod connected to the lock mechanism, and an intermediate plate connecting the input rod and the output rod. And an inner handle for rotating the intermediate plate.

According to the present invention, since the inner handle is disposed in the middle of the force transmission path from the outer handle to the lock mechanism, a route for the outer handle and a route for the inner handle are separately provided. Compared to the conventional type, the route is unified, so that the device can be reduced in size and space.

Further, the intermediate plate and the inner handle are rotatably pivotally supported by a common pin having the same rotation center, and the inner handle is engaged with the inner handle only to rotate the intermediate plate only in the unlock direction. A part may be provided.

In this case, since the intermediate plate and the inner handle are overlapped with each other, the compactness can be promoted. Also,
Since the intermediate plate and the inner handle are pivotally supported at the same rotation center with the common pin, their operating resistance is only the frictional resistance between the common pin and the insertion hole of the intermediate plate and the inner handle, and their operation vectors are shared. They coincide in the direction of rotation of the pin. Therefore, the operating resistance of each component is reduced, and the operating force of the outer handle and the inner handle is reduced.

Further, the input rod, the output rod, and the intermediate plate may be housed in a door frame. In this way, the door section can be eliminated and the view from the driver's cab can be expanded.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic view of a door provided with a slide door lock device of a construction machine according to this embodiment, FIG. 3 is an exploded view of the slide door lock device, and FIG. 4 is a side view of the slide door lock device. 5 is a sectional view taken along line VV in FIG. 4, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

As shown in FIG. 1, a slide door 1 for getting on and off a driver's cab of a construction machine such as a hydraulic shovel comprises a frame portion 2 and a window portion 3, and a bar 4 is omitted. The frame portion 2 has a rear end portion 5 formed in a step shape (Z shape) in a vertical direction. The rear end portion 5 houses a slide door lock device 6.

The slide door lock device 6 has an outer handle 7 provided outside the slide door 1, an inner handle 8 provided inside, and a lock mechanism 9 operated by the handles 7, 8. The sliding door lock device 6 switches the lock mechanism 9 between a locked state and an unlocked state by operating the handles 7 and 8. The slide door 1 is opened by sliding in the arrow direction 10 in the unlocked state, and does not slide in the locked state and does not open.

As shown in FIGS. 3 to 5, the slide door lock device 6 includes an input rod 11 connected to the outer handle 7 side, an output rod 12 connected to the lock mechanism 9 side, and the input rod 11 And an inner handle 8 for rotating the intermediate plate 13. Specifically, as shown in FIG. 5, a support bracket 15 is attached via a support member 14 in the rear end portion 5 of the frame 2 of the door 1. The support member 14 forms an inner panel of the frame 2 of the slide door 1.

FIGS. 3 and 4 show the supporting bracket 15.
The mounting plate 18 is mounted by bolts 16 and nuts 17 as shown in FIG. The mounting plate 18 has a first claw 21 with which an end 20 of a return spring 19 to be described later is engaged, and a hole 23 through which the common pin 22 is inserted.

As shown in FIG. 3, the mounting plate 18 is provided with a bush 24 for reducing sliding resistance.
The inner handle 8 is overlaid. The inner handle 8
As shown in FIG. 6, it is formed in a stepped cross section, a grip 25 is attached to an upper end thereof, a hole 26 through which the common pin 22 is inserted is formed in a lower portion, and the first claw is formed in a lower end. A second claw portion 27 is formed to abut the portion 21, and the engaging portion 2 abuts on the upper edge portion 28 of the intermediate plate 13 at the center portion.
9 are formed.

The end portion 30 of the return spring 19 inserted through the common pin 22 is engaged with the engaging portion 29. The return spring 19 urges the inner handle 8 in the direction of arrow A in FIGS. At this time, the inner handle 8 has its second claw 27 abutting on the first claw 21 of the mounting plate 18, whereby the basic position is established and the flutter is pressed down.

As shown in FIG. 3, the inner handle 8 is provided with a bush 31 for reducing sliding resistance.
The intermediate plate 13 is overlaid. The intermediate plate 13
A hole 33 for attaching the output rod 12 is formed at one end through an adjustment clip 32 for finely adjusting the length, and the input rod 11 is similarly formed at the other end via an adjustment clip 34.
A hole 35 for attaching the common pin 2 is formed in the center.
A hole 36 through which the second member 2 is inserted is formed.

The common pin 22 has a large diameter portion 37 and a small diameter portion 38 as shown in FIG. 3, and the return spring 19 is inserted through the large diameter portion 37 and the small diameter portion 38 as shown in FIG. The holes 21, 27, 36 and the bushes 24, 31 of the intermediate plate 13, the inner handle 8, and the mounting plate 18 are inserted. Thereby, the intermediate plate 13 is moved to the large diameter portion 37.
And the small-diameter portion 38, so that the intermediate plate 13 and the inner handle 8 are prevented from laterally shifting.

The input rod 11 is connected to the outer handle 7 as shown in FIG. On the other hand, the output rod 12
As shown in FIGS. 3 to 5, a hole 41 provided at one end of the L-shaped plate 40 via an adjustment clip 39 is provided.
It is connected to the.

The L-shaped plate 40 is rotatably mounted on a support bracket 42 mounted on the support member 14 via bolts 43. That is, a hole 44 through which the bolt 43 is inserted is formed in the center of the L-shaped plate 40. The other end of the L-shaped plate 40 has a hole 47 to which the final rod 46 is connected via an adjustment clip 45.

An adjusting clip 48 is attached to the final rod 46.
The operating lever 49 of the lock mechanism 9 is connected via the. As shown in FIG. 5, the lock mechanism 9 is attached to a support member 14 (inner panel) at the rear end portion 5 of the frame 2 of the door 1. The operating lever 49 is shown in FIG.
Usually, it is rotated upward by the reset spring 50, and in this state, it is in the locked state (the state in which the door 1 is not opened) (the state of FIG. 4), but downward by the final rod 46 against the reset spring 50. When rotated, it is in an unlocked state (a state in which the door 1 is opened) (a state in FIG. 8).

In place of the reset spring 50, as shown in FIG.
The reset spring 51 is inserted through the
One end of the rod is brought into contact with a flange 52 provided on the rods 12 and 46, and the other end is brought into contact with a stopper 53 attached to the support member 14, and the final rod 46 or the output rod 12 is operated by the reset spring 51. 49
May be urged to rotate upward (locked state).

The operation of this embodiment having the above configuration will be described.

The slide door lock device 6 is shown in FIG.
Alternatively, the operating lever 49 of the lock mechanism 9 is normally rotated upward by the reset springs 50 and 51 shown in FIG. In this locked state, the input rod 11, the output rod 12, the intermediate plate 13, the L-shaped plate 40, the final rod 46, and the operating lever 49 are pressed by the spring force of the reset springs 50 and 51, and fluttering is prevented. .

Here, when the locked state is released by the inner handle 8, the inner handle 8 is rotated in the direction of arrow B in FIG. Then, the engaging portion 29 of the inner handle 8 presses the upper end portion 28 of the intermediate plate 13,
As shown in FIG. 8, the intermediate plate 13 rotates counterclockwise, the output rod 12 is pulled to the left, and the L-shaped plate 40
Is rotated clockwise, and the operating lever 49 is rotated downward via the final rod 46. Thereby, the lock mechanism 9
Is unlocked.

When the inner handle 8 is released after the lock is released, the inner handle 8 is rotated by the return spring 19 and returned to the original position.
The plates 2 and 46 and the plates 13 and 40 are also returned to their original positions by the reset springs 50 and 51, and return to the state shown in FIG.

On the other hand, from the state shown in FIG.
When the locked state is released, the outer handle 7 shown in FIG. 1 is operated. Then, the input rod 11 is pulled downward as shown in FIG.
Is rotated counterclockwise, the output rod 12 is pulled to the left, the L-shaped plate 40 is rotated clockwise, and the final rod 4
The operating lever 49 is pivoted downward through the lever 6. As a result, the lock mechanism 9 is unlocked.

At this time, since the intermediate plate 13 rotates in a direction away from the engaging portion 29 of the inner handle 8,
The inner handle 8 does not move. Therefore, the force for moving the inner handle 8 is unnecessary, and the operating force for the outer handle 7 is correspondingly reduced. After the lock is released, each rod 11, 1 when the hand is released from the outer handle 7 is released.
The operations of 2, 46 and each of the plates 13, 40 are the same as those of the inner handle 8 described above.

According to the slide door lock device 6 according to the present embodiment, as shown in FIG. 1, the inner handle 8 is disposed in the middle of the force transmission path from the outer handle 7 to the lock mechanism 9. As shown in FIG. 2, as compared with the conventional type in which the route for the outer handle e and the route for the inner handle f are separately provided, since the route is unified, the size and space of the device are reduced. Can be promoted. Also, the intermediate plate 13 and the inner handle 8
Can be promoted to be more compact. Therefore, the sliding door lock device 6 is connected to the frame 2 of the door 1.
The bar 4 can be abolished by being housed in the rear end portion 5, and the field of view from the driver's cab is widened.

Since the intermediate plate 13 and the inner handle 8 are rotatably supported by the common pin 22 having the same center of rotation, their operating resistance is reduced by the common pin 22, the intermediate plate 13 and the inner plate. Only the frictional resistance of the handle 8 with the insertion holes 26 and 36 coincides with each other in that their operation vectors are in the rotation direction of the common pin 22.
Therefore, the operating resistance of each component is reduced, and the operating force of the inner handle 8 as well as the outer handle 7 is reduced.

[0034]

As described above, according to the slide door lock device for a construction machine according to the present invention, the following excellent effects can be exhibited.

(1) According to the first aspect of the invention, downsizing and space saving of the apparatus can be promoted.

(2) According to the second aspect of the invention, the operating force of the outer handle and the inner handle can be reduced.

(3) According to the third aspect of the invention, the field of view from the cab is widened.

[Brief description of the drawings]

FIG. 1 is a schematic view of a slide door provided with a slide door lock device of a construction machine according to an embodiment of the present invention.

FIG. 2 is a schematic view of a slide door provided with a slide door lock device of a construction machine showing a conventional example.

FIG. 3 is an exploded view of a slide door lock device of a construction machine showing one embodiment of the present invention.

FIG. 4 is a side view of the slide door lock device.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is an explanatory view showing a modified example of the reset spring.

FIG. 8 is a side view of the slide door lock device when the inner handle is operated.

FIG. 9 is a side view of the slide door lock device when an outer handle is operated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slide door 2 Frame part 6 Slide door lock device 7 Outer handle 8 Inner handle 9 Lock mechanism 11 Input rod 12 Output rod 13 Intermediate plate 22 Shared pin 29 Engagement part

Claims (3)

[Claims] 1. A slide door lock device for construction machinery, comprising: an outer handle provided outside a slide door, an inner handle provided inside, and a lock mechanism operated by each handle. An input rod connected to the outer handle side, an output rod connected to the lock mechanism side, an intermediate plate connecting the input rod and the output rod, and an inner handle for rotating the intermediate plate are provided. A slide door lock device for a construction machine, comprising: 2. The inner handle and the intermediate plate are rotatably pivotally supported by a common pin having the same rotation center, and the inner handle is engaged with the inner handle only to rotate the intermediate plate only in the unlock direction. The slide door lock device for a construction machine according to claim 1, further comprising a portion. 3. The slide door lock device for a construction machine according to claim 1, wherein the input rod, the output rod, and the intermediate plate are accommodated in a frame portion of the slide door.