JPH0667737U - Inner handle of cab door of construction machine - Google Patents

Abstract

(57) [Summary] [Purpose] Since the inner handle of the prior art is fixedly attached to the inner surface of the cab door, when the driver sitting in the driver's seat wants to close the door, it is opened in a 180 ° inverted state. Rotate the door toward the outside front. However, when the door is rotated about 70 ° from the open position, a considerable force is required toward the outside, which makes it difficult to close the cab door. This problem is solved. [Structure] In the inner handle of the present invention, a bracket is erected on the inner surface of the cab door, and the lever handle is pivotally supported by a vertical pin on the bracket so that the lever handle can be rotated in the left and right horizontal directions. The length from the vertical pin to the tip on the side farther from the hinge is set to be considerably longer than that on the side closer to the hinge, and the portion of the tip end of the lever handle on the side closer to the hinge that faces the inner surface of the door. Is formed in the stopper portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of an inner handle mounted on the inner surface side of a cab door of construction machines such as hydraulic excavators and work vehicles.

[0002]

[Prior art]

 FIG. 3 is a side view of essential parts showing a state in which a cab door 2 (hereinafter, referred to as a door 2) of a hydraulic excavator equipped with a conventional inner handle 1 is opened. In the figure, 3 is a revolving superstructure of a hydraulic excavator, 4 is a cab for a driver's cab, 5 is an entrance / exit of the cab 4, 6 is a hinge screwing a door 2 to the cab 4, 7 is a driver, 8 is a It is the undercarriage of a hydraulic excavator. FIG. 4 is a plan view of an essential part viewed from AA of FIG. In the figure, 9 is a bolt for fixing the inner handle 1 to the inner surface of the door 2, and 10 is a stopper for opening the door (2). As shown in FIG. 3 and FIG. 4, the door 2 is screwed into the entrance / exit 5 on the side surface of the cab (4) by a hinge 6 so as to be openable / closable in the left-right front-rear direction, and is attached to the inner surface of the door 2. The inner handle 1 is fixedly provided by tightening bolts (9).

[0003]

[Problems to be solved by the device]

 In a hydraulic excavator, a driver may sit in a driver's seat and perform a driving operation with the cab door opened (a state in which the cab door is rotated 180 ° from the position of the entrance / exit to open the cab door). Since the inner handle of the prior art is fixed to the inner surface of the cab door by bolts, when the seated driver wants to close the door, his / her hand should be extended outward and the inner handle should be held near the hinge. Grab Then, by grasping the above position, the cab door is turned toward the front side in the outer direction. In this case, when the cab door opened in the 180 ° inverted state is rotated by about 70 ° from that position, a considerable force is required toward the outside, which makes it difficult and difficult to close the cab door. An object of the present invention is to provide a structure of an inner handle that can solve the above problems.

[0004]

[Means for Solving the Problems]

 The inner handle of the present invention is an inner handle that is attached to the inner surface of the door by screwing the door to the entrance and exit of the side of the cab by a hinge so that the door can be opened and closed in the left and right directions. A bracket is erected on the bracket, and the lever handle is pivotally supported on the bracket by a vertical pin that can be rotated in the left and right horizontal directions.The length of the lever handle is defined as the length of the lever handle. Up to a length closer to the hinge, and a portion of the tip of the lever handle near the hinge that faces the inner surface of the door is formed as a stopper so that when closing the door, The gripping position of the lever handle is set on the side far from the hinge. In addition, the lever handle part far from the hinge is configured to be biased toward the inner surface of the door by a spring member.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of essential parts showing a state in which a cab door 2 '(hereinafter referred to as a door 2') of a driver's cab of a hydraulic excavator equipped with an inner handle 11 of the present invention is opened. In the figure, the same reference numerals are given to those using the same constituent elements as those in the prior art. 4'is a cab. FIG. 2 is a plan view of an essential part seen from BB of FIG. In the figure, 12 is a bracket which is fixedly installed upright on the inner surface of the door 2 ', 13 is a vertical pin, 14 is a lever handle of the inner handle 11, 15 is a bent tip portion of the lever handle 14, and 16 is a stock handle. The pad portion 17 is a spring member having a relatively weak biasing force.

Next, the structure of the inner handle 11 of the present invention will be described with reference to FIGS. 1 and 2. In the present invention, a bracket 12 is erected on the inner surface of the door 2 ′, and a lever handle 14 is pivotally supported on the bracket 12 by a vertical pin 13 so that the lever handle 14 can be horizontally rotated. As the length, the dimension 1 from the vertical pin 13 to the bent tip portion 15 on the side far from the hinge 6 is set to be considerably longer than the dimension S on the side close to the hinge 6, and the lever on the side close to the hinge 6 is set. A portion of the tip end of the handle 14 facing the inner surface of the door (2 ′) is formed in the stopper portion 16, and the gripping position of the lever handle 14 during the closing operation of the door 2 ′ is a portion farther from the hinge 6 (see FIG. 2). It is set to the part (a) indicated by the sign. Further, the lever handle 14 portion (a) on the side far from the hinge 6 is configured to be biased toward the inner surface portion of the door 2 ′ by the spring member 17.

Next, the operation of the structure of the inner handle 11 of the present invention will be described. In the inner handle 11 of the present invention, the portion (a) of the lever handle 14 far from the hinge 6 is urged toward the inner surface of the door 2 ′ by the spring member 17, so that the lever handle is always provided. One end (one end of the reference numeral B shown in FIG. 2) of the bent tip portion 15 of 14 is in contact with the inner surface portion of the door 2 ′. Therefore, the lever handle 14 does not rattle when the inner handle 11 is not gripped and operated. Next, when the driver 7 who is seated wants to close the open door 2 ', his or her hand is extended outward and the lever handle 14 is grabbed by the reference sign a, and the lever handle 14 is directed toward the front side in the outward direction, that is, the arrow mark. Rotate in the direction of. In this case, the door 2'does not move, but the lever handle 14 can be rotated by an angle a (angle a is about 70 °) with a light force against the weak biasing force of the spring member 17. it can. When the lever handle 14 is rotated by the angle a, the stopper portion 16 of the lever handle 14 near the hinge 6 comes into contact with the inner surface portion of the door 2 '. After that, the lever handle 14 is rotated in the direction of arrow D so as to pull the lever handle 14 to the front side. The direction of the arrow D, that is, the operation of pulling to the front side by the driver does not require much labor because it can be easily pulled in the sitting posture. Therefore, the door 2'can be easily closed by pulling in the direction of arrow d.

[0008]

[Effect of device]

 Since the inner handle of the prior art is fixed to the inner surface of the cab door by bolts, the driver seated in the driver's seat wants to close the door. Rotate toward the front. However, when the door is rotated about 70 ° from the open position, a considerable force is required toward the outside, which makes it difficult to close the cab door. However, in the present invention, when the driver seated in the driver's seat wants to close the open door, the lever handle is rotated about 70 ° toward the front side in the outward direction. In this case, the door does not move, but the lever handle can be rotated by about 70 ° with a light force against the weak biasing force of the spring member. When the lever handle is turned about 70 °, the stopper handle stopper comes into contact with the inner surface of the door. After that, the door can be closed by pulling the lever handle forward toward you. That is, since the driver can easily pull in the sitting posture, the pulling operation to the front side does not require much labor. Therefore, in the hydraulic excavator equipped with the inner handle of the present invention, labor can be saved when the opening operation of the opened cab door is performed, and operability at the time of the closing operation can be improved.

[Brief description of drawings]

FIG. 1 is a side view of essential parts showing a state in which an inner handle of the present invention is equipped and a cab door of a driver's cab is opened.

FIG. 2 is a plan view of an essential part seen from BB in FIG.

FIG. 3 is a side view of essential parts showing a state in which a cab door of a hydraulic excavator equipped with an inner handle of the related art is opened.

FIG. 4 is a plan view of an essential part seen from AA in FIG.

[Explanation of symbols]

 1,11 Inner handle 2,2 'Door (cab door) 4,4' Cab 6 Hinge 12 Bracket 13 Vertical pin 14 Lever handle 15 Bending tip 16 Stopper 17 Spring member

Claims (2)

[Scope of utility model registration request] 1. An inner handle which is attached to an inner surface of a door by screwing a door to a doorway of a side surface of a cab by a hinge so as to be opened and closed in the left-right direction and is attached to the inner surface of the door. Stand upright, and the lever handle is pivotally supported on the bracket by a vertical pin so that the lever handle can rotate horizontally.
As the length of the lever handle, the dimension from the vertical pin to the tip on the side far from the hinge is set to be considerably longer than that on the side closer to the hinge, and the inside of the door at the tip of the lever handle on the side closer to the hinge is set. An inner handle for a cab door of a construction machine, characterized in that a portion opposed to the portion is formed as a stopper portion, and a gripping position of the lever handle at the time of closing operation of the door is set to a portion far from the hinge. 2. The inner handle of the cab door of the construction machine according to claim 1, wherein the lever handle portion far from the hinge is biased toward the inner surface of the door by a spring member. The inner handle of the cab door of construction machinery, which is characterized by being configured as follows.