JPH0781423A - Slide type opening/closing door for working vehicle - Google Patents

Abstract

PURPOSE:To restrain rattling of a door by providing a recessed part in which a guide roller can be embraced from right and left directions on the terminal end part of a guide rail. CONSTITUTION:For restraining rattling of an opened door 6, an elastic stopper 14 made of rubber is provided on the terminal end part of a guide rail 8c' against guide rollers 8c rotationally movable around vertical axis of the middle part in the vertical direction. In elastic stopper 14 is provided with a recessed part 14a embracing the guide roller 7c on the rear end side of a pair of guide rollers 7c, 7c from the rear so as to restrain play right and left. The door 6 is pushed back frontward by resiliency of rubber so as to strongly press a metal fitting 13 on the door 6 side against a lock metal fitting 12 and restrain rattling in the front and rear directions, and it is fitted to the guide rail 8c' through screws 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle such as a backhoe, and more particularly to a sliding type opening / closing door of a driving cabin.

[0002]

2. Description of the Related Art A conventional structure of a sliding type door of a driving cabin in a backhoe will be described with reference to FIG. 5, FIG. 3 and FIG. As shown, the side wall 5a of the operating cabin 5 is formed in an arc shape along the swivel base 2, and the door 6 is flush with the side wall 5a when closed and when opened. So that it is located outside 5a,
It projects outward and is opened / closed along the arcuate side wall 5a.

In order to open and close the door smoothly, as shown in FIGS. 2 and 3, the upper and lower portions of the front end of the door 6 and the vertical middle portion of the rear end of the door 6 are surrounded by a vertical axis. The guide rollers 7a, 7b, 7c that rotate with the door 6 and the door 6
Guide rollers 7b ', 7c' which rotate around a horizontal axis for load support at a lower portion on the front end side and an intermediate portion in the vertical direction on the rear end side.
On the other hand, guide rails 8a for the guide rollers 7a, 7b, 7c, 7b ', 7c' are provided at the upper and lower edges of the entrance / exit 5b, and in the vertical middle part of the side wall behind the entrance / exit 5b. , 8b, 8c, 8b ', 8c' are provided.

Then, the opened door 6 passes through the lock fitting 12 which can freely move in and out of the side wall 5a, and then the door 6 is opened.
The metal fitting 13 on the side is brought into contact with the lock metal fitting 12 to regulate the return.

[0005]

When excavation work is performed with the door fully opened and traveling on a highly uneven road surface, due to the fitting tolerance between the guide rail and the guide roller, the door is rattled, noise is generated, and the guide rail is damaged. There was an inconvenience that it was easily deformed and damaged.

Therefore, as means for solving the above-mentioned drawbacks,
It is possible to reduce the fitting tolerance between the guide rail and the guide roller to suppress backlash. However, in such a case, there is a disadvantage that precision is required for manufacturing and assembling.

It is an object of the present invention to suppress rattling of a door by a simple structural improvement without requiring precision in manufacturing or assembling a guide rail or the like.

[0008]

In order to achieve the above object, the present invention is characterized in that an elastic stopper having a recessed portion capable of holding the guide roller in the left and right direction is provided at the terminal end portion of the guide rail. In point.

[0009]

As shown in FIG. 1B, the door 6 in the fully opened state is restrained from back-and-forth play by pushing the metal fitting 13 on the door 6 side against the lock metal 12 by the repulsive force of the elastic stopper 14. At the same time, the guide roller 8c is held in the left-right direction by the elastic stopper 14, so that play in the left-right direction is suppressed.

[0010]

As a result of the above construction, with a simple structure in which the elastic stopper is attached to the terminal end portion of the guide rail, it is possible to suppress rattling when the door is fully opened, and the fitting tolerance between the guide rail and the guide roller is reduced. Precision is not required for manufacturing or assembling the guide rails, guide rollers, etc., as compared with the case where the size is reduced to prevent rattling.

[0011]

EXAMPLES Examples of the present invention will be described below with reference to a mini backhoe.

FIG. 5 shows the entire mini backhoe. This backhoe is provided with a swivel base 2 on the upper part of the crawler traveling device 1 so as to be rotatable around the longitudinal axis, and on the upper part of the swivel base 2, a driving force is provided. The section 3, the excavation device 4, and the operating cabin 5 are provided.

The operation cabin 5 is provided on the lateral side of the excavator 4, and the lateral outer wall 5a of the fuselage is located on the swivel base 2.
Is formed in an arc shape along the outer peripheral edge of, and the door 6 is provided so as to be slidable and openable along the arc-shaped side wall 5a.

Next, the structure of the slide type opening / closing door 6 will be described. When the door 6 is closed, it is flush with the side wall 5a, and when opened, it is located outside the side wall 5a. As shown in FIGS. 2 and 3, since it projects outwardly and is opened and closed along the arcuate side wall 5a.
As shown in, the upper and lower parts of the front end side of the door 6, and
Guide rollers 7a, 7b, 7c that rotate around a vertical axis in the vertical middle portion on the rear end side, and a horizontal shaft for supporting loads at the lower portion on the front end side of the door 6 and the vertical intermediate portion on the rear end side. Guide rollers 7b ', 7c' that rotate around the core are provided, while the guide rollers 7a, 7c 'are provided at the upper and lower edges of the entrance / exit 5b and in the vertical middle part of the side wall behind the entrance / exit 5b, respectively.
Guide rail 8 for 7b, 7c, 7b ', 7c'
a, 8b, 8c, 8b ', 8c' are provided.

The guide rail 8c at the intermediate portion in the vertical direction,
8c 'has a start end that is largely bent toward the inside of the body so that the door 6 can be closed flush with the side wall 5a.

The upper and lower guide rollers 7a, 7
b and 7b 'are support stays 9 fixed to the door 6, respectively.
It is rotatably attached to a and 9b.

The guide roller 7c at the intermediate portion in the vertical direction,
7c 'is rotatably mounted on a support stay 9c mounted on the door 6 so as to be swingable around the longitudinal axis so that the guide rails 8c, 8c' can be smoothly guided along the starting ends thereof. Has been done.

On the upper surface of the lower guide rail 8b ',
A resin sheet 10 is attached in order to suppress vibration and noise when the roller rolls, and the front and rear portions of the guide roller 7b ′ rolling on the upper surface of the resin sheet 10 are shown in FIG. As shown, a part of the support stay 9b that supports the guide roller 7b 'is bent toward the inside of the machine to form the resin sheet 1.
Scrapers 11 and 11 for discharging the mud that has fallen to the upper surface of 0 to the outside are provided.

As shown in FIG. 1, the opened door 6 is movable in and out of the side wall 5a, and after the lock metal fitting 12 which can be unlocked from the inside of the operation cabin 5 is passed over, the inner surface of the door 6 is opened. The metal fitting 13 attached to the above is in contact with the rear end of the lock metal fitting 12 so that the forward return is restricted.

Then, in order to prevent the open door 6 from rattling, a guide rail 8c 'for a guide roller 8c rotatable about a vertical axis of the vertical middle portion.
An elastic stopper 14 made of rubber is provided at the terminal end of the.

The elastic stopper 14 is a guide roller 7c on the rear end side of the pair of front and rear guide rollers 7c, 7c.
Is provided with a recessed portion 14a for hugging from the rear part and suppressing rattling on the left and right, and the door 6 is pushed back by the repulsive force of the rubber and the metal fitting 13 on the door 6 side is strongly pressed against the lock metal fitting 12. It also prevents rattling in the front-rear direction and is attached to the guide rail 8c via a screw 15.

[Other Embodiments] The work vehicle may be a dozer work vehicle, a crane vehicle, or the like, in addition to the mini backhoe, as long as it is a work vehicle having a slide type opening / closing door.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view showing an opened / closed state of a door.

[Fig. 2] Side view of a driving cabin

FIG. 3 is a vertical cross-sectional rear view showing a door support structure.

FIG. 4 is a cross-sectional plan view of a lower guide roller.

[Fig. 5] Overall plan view

[Explanation of symbols]

 5 Operation Cabin 5a Side Wall 6 Door 7c Guide Roller 8c Guide Rail 14 Elastic Stopper 14c Recessed Portion

Claims (1)

[Claims] 1. A door (6) provided on a side wall (5a) of a driving cabin (5), a guide roller (7c) and a side wall (5a) which are rotatable around a vertical axis mounted on the door (6). ) Is configured to be openable and closable along the side wall (5a) via a guide rail (8c) attached to the lock rail (1) and the return of the opened door (6) can be retracted from the side wall (5a).
2) A slide-type opening / closing door of a work vehicle which is regulated via 2), wherein a recessed portion (14a) capable of holding the guide roller (7c) in the left-right direction is provided at a terminal end portion of the guide rail (8c). Sliding door of a work vehicle provided with an elastic stopper (14).