JP3537868B2 - Cabin door auxiliary handle device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door mounted on a cabin of a construction machine, and more particularly to an auxiliary handle device for closing a door.

[0002]

2. Description of the Related Art FIG. 10 shows a cabin 1 of a conventional construction machine. A cabin 1 is provided with a lift 2 at a side portion thereof, and a door 4 is hinged with hinges 3 and 3. When the door 4 is opened from the inside of the cabin 1, the lock is released by operating a door handle 5 provided on the inner surface of the door 4.

A stay 6 is provided at the center of the inner surface of the door 4.
When the door 4 is closed, the stay 6 is gripped and the door 4 is pulled.

[0004]

The conventional cabin 1 is
When the door 4 is closed, the stay 6 is gripped.
Is fully opened, the operator has to lean out of the elevating opening 2 and the closing operation is troublesome and there is a risk of falling. It is conceivable to extend the length of the stay 6 in order to facilitate the grip of the operator. However, since the stay 6 protrudes from the inner surface of the door 4, the stay 6 is provided to the operator when the door 4 is closed. There is a possibility that a finger or the like may be damaged by contact.

[0005] Therefore, technical problems to be solved arise in order to facilitate the operation of closing the door of the cabin and to improve the safety of the operator, and the present invention aims to solve this problem. I do.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and relates to a construction machine in which a door is hinged to a side portion of a cabin by a hinge. A rail is provided near the rotation axis of the door substantially parallel to the opening and closing direction of the door, a bracket is slidably fitted to the rail, and one end of a door auxiliary handle is attached to the bracket, A door auxiliary handle of a cabin in which the other end of the door auxiliary handle is protruded toward the rotation axis of the door along the inner surface of the door, and the bracket is urged by a spring in a direction opposite to the rotation axis of the door. An apparatus is provided.

[0007]

When closing the fully opened door, first grasp the other end of the door auxiliary handle protruding toward the axis of rotation of the door and pull it, the bracket attached to one end of the door auxiliary handle will be closed. By sliding the rail, the door assist handle is pulled out of the door. Then, when the pulled-out door assist handle is pressed into the inside of the cabin, a turning force is applied to the door via the bracket, and the door is closed with the hinge as the rotation axis of the door.

After the door is closed, when the other end of the door auxiliary handle is released from gripping, the bracket is slid along the rail in the direction opposite to the axis of rotation of the door by the bias of the spring. An auxiliary handle is retracted along the inside of the door.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows a hydraulic shovel 11 in which a lower race 12 such as a crawler has a ball race 13.
The upper revolving superstructure 14 is mounted via the. Upper revolving superstructure 1
A cabin 15 is provided at a front portion of the cabin 4, and a door 18 is hinged to hinges 17 at an elevating opening 16 provided at a side portion of the cabin 15.

The door 18 has hinges 17,17.
Is formed to be freely openable and closable as the rotation axis A of the door, and the lock is released by the operation of the door handle 19, and as shown, the door 18 is opened to the fully open position. Here, a door auxiliary handle device 20 is provided on the inner side surface of the door 18 near the rotation axis A of the door.
2 and 3 show a main part of the door auxiliary handle device 20. A rail 21 is provided in a direction orthogonal to the rotation axis A of the door, that is, substantially parallel to the opening and closing direction of the door 18, and a bracket is attached to the rail 21. 22 is slidably fitted.

Plates 22a and 22b are provided at upper and lower positions of the bracket 22, respectively.
a and the pin 23 is inserted through 22b. One end 24a of a door auxiliary handle 24 is attached to the upper and lower ends of the pin 23, and a torsion coil spring 25 is interposed in the middle of the pin 23. The door auxiliary handle 24 is formed in a U-shape in a vertical sectional view, is attached along the rail 21 in parallel with the rail 21, and the other end 24b protrudes toward the rotation axis A of the door. A pin 26 is erected on the inner side of the door auxiliary handle 24 to lock one end 25a of the torsion coil spring 25 to the pin 26 and to connect the other end 25b of the torsion coil spring 25 to the plate 22a. Stop.

By interposing the torsion coil spring 25, the door assist handle 24 is urged to rotate clockwise about the pin 23 in FIG.
The back surface of the door auxiliary handle 24 contacts the surface of the rail 21. On the other hand, a locking piece 22c is projected from the bracket 22, and a spring 27 is interposed between the locking piece 21a provided at the end of the rail 21 and the locking piece 22c of the bracket. The bracket 22 is moved by the spring 27 in the direction opposite to the rotation axis A of the door (in the direction of arrow B).
Energize to. Therefore, the door auxiliary handle 24 is also pulled in the same direction, and comes into close contact with the rail 21 with the other end 24b protruding.

Next, the operation procedure of the door assist handle device 20 will be described with reference to FIGS. When closing the fully opened door 18, the other end 24b of the door auxiliary handle 24 projecting toward the rotation axis A of the door is gripped,
As shown in FIG. 4, it is pulled in the direction of arrow C. As shown in FIG. 1, the other end 24 b of the door assist handle 24 protrudes to the elevator 16 of the cabin 15, so that the operator holds the door assist handle 24 while sitting in the driver's seat. Can be easily gripped.

The door assist handle 24 is moved to the direction indicated by arrow C.
When pulled in the direction, the bracket 22 slides on the rail 21 against the spring 27, and the door auxiliary handle 24 is pulled out of the door 18 as shown in FIG. When the door assist handle 24 is pressed inward (in the direction of arrow D) of the cabin 15, a turning force is applied to the door 18 via the bracket 22, and as shown in FIG. Rotate in the closing direction around.

Further, as shown in FIG. 7, if the grip of the door assist handle 24 is released after the door 18 is closed, the door assist handle 2 is biased by the spring 27.
4 is pulled toward the rail (in the direction of arrow E). Accordingly, the bracket 22 slides along the rail 21 and the door assist handle 24 is retracted along the inner surface of the door 18 as shown in FIG.

When foreign matter 28 is caught in the door assist handle 24 when the door 18 is closed, the door assist handle 24 rotates about the pin 23 and the other end 24.
b rises to prevent the door assist handle device 20 from being damaged, and there is no risk of damaging the finger even when the operator pinches the finger. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0017]

According to the present invention, as described in detail in the above-described embodiment, the door auxiliary handle device is provided in the vicinity of the rotation axis of the door. The door auxiliary handle can be easily gripped. Therefore, the danger of leaning out of the elevator can be eliminated.

Further, the door auxiliary handle is freely retractable along the inner side surface of the door, and is retracted by the bias of the spring when not in use, so that it does not hinder the operator. As described above, the present invention provides various effects such as improved safety at the time of cabin door closing operation and improved operability.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic excavator according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the door auxiliary handle device.

FIG. 3 is a cross-sectional view of the door assist handle device.

FIG. 4 is an explanatory diagram showing an operation procedure of the door auxiliary handle device.

FIG. 5 is an explanatory view showing an operation procedure of the door auxiliary handle device.

FIG. 6 is an explanatory view showing an operation procedure of the door auxiliary handle device.

FIG. 7 is an explanatory view showing an operation procedure of the door auxiliary handle device.

FIG. 8 is an explanatory view showing an operation procedure of the door auxiliary handle device.

FIG. 9 is an explanatory view showing an operation procedure of the door auxiliary handle device.

FIG. 10 is a side view of a main part showing a conventional cabin door.

[Explanation of symbols]

11 Hydraulic excavator 15 cabins 17 Hinge 18 door 20 Door auxiliary handle device 21 rails 22 Bracket 24 Door auxiliary handle 24a One end 24b other end 27 Spring

Claims (1)

(57) [Claims] In a construction machine in which a door is hinged to a side portion of a cabin with a hinge, an inner surface of the door is located near an axis of rotation of the door and substantially parallel to the opening and closing direction of the door. A rail is provided, a bracket is slidably fitted to the rail, and one end of a door auxiliary handle is attached to the bracket, and the other end of the door auxiliary handle is connected to the door rotation axis side along the inner side surface of the door. A door auxiliary handle device for a cabin, wherein the bracket is urged in a direction opposite to a rotation axis of the door by a spring.