JP2722055B2 - Cab of construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab (operator's cab) of a construction machine such as an excavator and a crane truck.

[0002]

2. Description of the Related Art In general, as shown in FIG. 9, the construction machine is provided with a swivel base R on a moving device M having a caterpillar and the like, and on the swivel base R, a shovel device S, a crane device and the like and power thereof. The device P and a cab 1 for controlling the devices P are mounted. In recent years, in order to improve the livability while keeping the cab 1 as small as possible, the cab 1 is provided with a sliding door 2 and the side portion 3 including the door 2 is mounted on the swivel base R.
An increase in the cab inner volume as an arc having a radius close to the maximum rotation radius of the cab is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-353129, and is also produced as an actual vehicle.

[0003]

In the cab 1 of this type, the upper end 4a of the front portion 4 having a window is often inclined rearward in order to secure a front upper view. In the case where the cab side portion 3 including the cab is a circular arc, the conventional arc has a center of rotation of the swivel table as a rotation axis from the upper and lower ends to the upper end of the cab. Therefore, as shown in FIG. Is the upper end 4 inclined backward
Unless the horizontal outer end 4b side in FIG. 3A is opened outward, the cab 1 does not join with the upper end of the arcuate cab side surface portion 3, so that there is a problem that the cab 1 looks very poor when viewed from the front. . In addition, the stopper of the conventional slide door 2 protrudes outward from the side surface of the cab, and may be caught on an obstacle when working at the limit. The present invention solves the above-mentioned problems in the cab of a construction machine having a curved cab side surface including a door, and particularly has a good appearance when viewed from the front of the cab, does not have a protrusion of a stopper, and is manufactured. An object of the present invention is to provide an easy-to-use construction machine cab.

[0004]

In order to achieve the above object, according to the present invention, in a cab of a construction machine mounted on a swivel base, (1) a front portion has the same width vertically and an upper portion thereof is rearward. At the same time, the side surfaces connected to each other through a post surface having a width parallel to the outer end of the front portion formed substantially at right angles to the front portion at the horizontal outer end of the front portion are curved surfaces including the door. In configuring, (2) the lower end of the cab has a lower arc having a radius smaller than the maximum turning radius of the swivel, and (3) at the lower end of the opening of the door, the lower end from the rear end of the post surface. The arc contacts the arc at the point where the cab width is maximized, and has a basic arc extending to the rear end point of the cab provided inside the intersection of the outer end of the rear surface and the lower arc, and (4) exceeding the lower end of the door opening. Up to the upper end of the opening, The front end starts at the rear end of the post surface and ends with the rear end of the door opening, and is constituted by a pseudo-cylindrical surface. (5) Between the rear end of the door opening and the rear end point of the cab, It is formed by a semi-basic cylindrical surface formed by a rear arc that forms a portion between the rear end of the door opening and the rear end point of the cab in the basic arc.

[0005]

According to the cab of the construction machine of the present invention having the above-described structure, when the side portion is formed to have a curved surface including the door, the front portion of the cab has the same width vertically and the upper portion thereof is inclined backward. By using the pseudo-cylindrical surface between the rear end of the post surface and the rear end of the door opening to improve the appearance as viewed from the front of the cab while maximizing the cab width, and to facilitate manufacture. The semi-basic cylinder between the rear end of the door opening and the rear end point of the cab eliminates the protrusion of the stopper and facilitates the manufacture.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to FIGS. 1 to 6. Reference numeral 10 denotes a cab of the present invention, which is formed in a box shape as in the prior art, and is mounted on a swivel base R having an arc portion Ra. ing. The front portion 11 of the cab 10 has the same width in the vertical direction, and its upper end 11a is inclined rearward. The horizontal (left-right) end of the front part 11 is
At the outer end side (door side), it is connected to a side surface portion 14 including a door 13 via a post surface 12 formed at right angles to the front surface portion 11,
Also, the inner end side (the side opposite to the door) of the end portion is an inner side surface portion 15.
Is connected to 16, 17, and 18 are doors 1
3 is a slide rail, and 19 is a stopper of the door 13.

As shown in FIG. 3, the side surface portion 14 projects outwardly in an arc shape when viewed in plan. The structure is as follows. That is, (a) the lower end of the cab 10 has a lower circular arc 22 starting from a symbol a having a radius 21 smaller than the maximum turning radius 20 of the swivel table R, and (b) the door 13
At the lower end of the opening, the lower end of the post surface 12 comes into contact with the lower arc 22 at a point where the cab width is maximized, and the intersection between the outer end of the rear surface 26 and the lower arc 22. 27, a basic arc 24 extending to the rear end point 30 of the cab provided on the inner side of (27).
4, 24 ', the front end of the pseudo-cylindrical surface 32 starts at the rear end of the post surface and ends at the rear end of the door opening, and (d) the rear end of the door opening. A semi-basic cylindrical surface 33 formed by a rear arc 31 between the hoe and the cab rear end point 30 and between the rear end hoe of the door opening and the cab rear end point 30 in the basic arc 24 is formed. 4 and 5 are examples in which a handrail 25 is provided on the post surface 12 to ensure safety when getting on and off the vehicle.

The shape of the side portion 14 includes the above (b)
"The cab rear end point 30 is provided inside the intersection 27 between the outer end of the rear surface portion 26 and the lower arc 22" and "the semi-basic between the door opening rear end hoe and the cab rear end point 30". As shown in FIG. 8, the cab 10 side portion 14 of the stopper 19
There are also inventions that minimize the amount of protrusion from the surface. That is, the stopper 19 is fixed to the vicinity of the joint portion 27 of the side surface portion 14 with the rear surface portion 26 of the cab 10 by the bracket 19a.
4 is formed of a uniform arc having a large radius, so that the amount of protrusion (28) of the stopper 19 outwardly is large, so that the stopper 19 also protrudes from the side surface portion 14 as shown in FIG.
When turning in a narrow place where the service limit is full, there was a risk of getting caught in surrounding obstacles. Therefore, in the present invention, the connecting point 27 of the side surface portion 14 with the rear surface portion 26 is defined as FIG.
As shown in FIG. 3, the protrusion 30 is drawn inward, and the protrusion from the side surface portion 14 is set as an amount necessary for stopping the door 13 so as to eliminate the influence on the surroundings.

[0009]

A cab of a construction machine according to the present invention is a cab of a construction machine mounted on a swivel, wherein the front portion has the same width vertically and the upper portion is inclined rearward, and the front portion is horizontal. When the side surface portion connected via a post surface having a width parallel to the outer end of the front portion formed substantially at a right angle to the front portion at the outer end in the direction, and having a curved surface including a door, the lower end of the cab is A lower arc having a radius smaller than the maximum rotation radius of the swivel table, and at the lower end of the opening of the door, the lower arc contacts the lower arc at the point where the cab width is maximized from the rear end of the post surface, and the rear surface portion The bottom end of the door has a basic arc extending to the rear end point of the cab provided inside the intersection of the lower arc and the lower end of the opening. At the rear end A quasi-cylindrical surface that begins and ends at the rear end of the door opening, and between the rear end of the door opening and the rear end of the cab, the rear end of the door opening and the rear end of the cab in the basic arc. The cab is formed of a semi-basic cylindrical surface with a rear circular arc, so that the front portion of the cab has the same width over the top and bottom, and even if the upper portion is inclined rearward, the rear end of the post surface and the rear of the door opening portion By making the pseudo-cylindrical surface up to the end, it is possible to improve the appearance as viewed from the front of the cab while maximizing the cab width, and to facilitate manufacture, and to make the rear end of the door opening and the By forming the semi-basic cylinder between the rear end points of the cab, there is an effect that the protrusion of the stopper can be eliminated and the production can be facilitated.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an embodiment of a cab of a construction machine according to the present invention.

FIG. 2 is a schematic side view of one embodiment of a cab of the construction machine according to the present invention.

FIG. 3 is a schematic plan view of an embodiment of the cab of the construction machine according to the present invention.

FIG. 4 is a schematic front view of another embodiment of the cab of the construction machine according to the present invention.

FIG. 5 is a schematic side view of another embodiment of the cab of the construction machine according to the present invention.

FIG. 6 is a perspective view of a cab of the construction machine according to the present invention.

FIG. 7 is a schematic front view of an embodiment of a cab of a conventional construction machine.

FIG. 8 is an enlarged plan view of the vicinity of a door stopper.

FIG. 9 is a side view showing an example of a construction machine to which the present invention is applied. 1, 10; Cab 2, 13; Door (slide door) 3, 14; Side surface 4, 11, Front surface 12, Post surface 15; Inner surface 16, 17, 18; Slide rail 19; Stopper 20; Maximum turning radius 21, 23; Radius 22; Lower arc 24, 24 '; Basic arc 25; Handrail 26; Rear surface 27; Intersection 30; Cab rear end point 28, 29; Stopper protrusion 31; Rear arc 32; Cylindrical surface 33; semi-basic cylindrical surface M; moving device R; swivel base S; shovel device P;

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-180183 (JP, A) JP-A-7-9847 (JP, A) JP-A-4-134567 (JP, U)

Claims (1)

(57) [Claims] 1. A cab of a construction machine mounted on a swivel base, wherein a front portion has the same width vertically and an upper portion thereof is inclined rearward, and a horizontal outer end of the front portion is substantially equal to the front portion. When forming the side surface portion connected via a post surface having a width parallel to the outer end of the front portion formed at a right angle with a curved surface including a door, the lower end of the cab has a maximum turning radius of the swivel. It has a lower arc of smaller radius, and at the lower end of the opening of the door, it contacts the lower arc and the cab width from the rear end of the post surface at a point that maximizes the cab width, and contacts the outer end of the rear surface and the lower arc. Has a basic arc reaching the rear end point of the cab provided inside from the intersection of the above, beyond the lower end of the door opening, up to the upper end of the opening, the front end sequentially starts with the basic arc at the rear end of the post surface,
Consisting of a pseudo-cylindrical surface ending at the rear end of the door opening,
In addition, a portion between the rear end of the door opening and the rear end point of the cab is formed as a semi-basic cylindrical surface formed by a rear arc forming a portion between the rear end of the door opening portion and the rear end point of the cab in the basic arc. And cab of construction machinery.