JP7151577B2 - Construction machine cab - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cab of a construction machine equipped with a retractable sunshade.

2. Description of the Related Art Conventionally, construction machines such as hydraulic excavators are known to have a cab (operator's cab) provided with a sunshade (see, for example, Patent Document 1).

JP 2014-190086 A

By the way, when trying to install a sunshade on the rear glass of a cab, for example, it is assumed that the sunshade main body (winding part) is arranged above the rear glass (ceiling side) and the sunshade surface is drawn downward.

However, when the sunshade main body (winding portion) is arranged above the rear glass, the sunshade main body blocks the view of the upper part of the rear glass, resulting in a problem that the rear view from the driver's seat is deteriorated.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a technique capable of ensuring a good rear view from the driver's seat when a roll-up sunshade for shielding the rear glass is installed in the cab of a construction machine.

In order to achieve the above object, the present invention provides a cab for a construction machine equipped with a retractable sunshade, comprising left and right rear pillars extending vertically on both left and right sides of the rear part of the cab, and a rear glass provided between the left and right rear pillars. and a hollow cross member disposed between the left and right rear pillars above the cab ceiling interior and having an opening on the lower side, wherein the internal space of the cross member includes the roll-up sunshade. is disposed, and the sunshade surface of the retractable sunshade is configured to be able to be pulled out through the opening of the cross member.

Here, the roll-up sunshade is configured such that the sunshade surface pulled out from the roll-up portion is arranged closer to the rear glass than the rotation shaft of the roll-up sunshade in the longitudinal direction of the machine. is preferred.

In addition, the cross member has a mounting portion for mounting the cab ceiling interior, and the cab ceiling interior is attached to the cross through the mounting portion at a position that does not interfere with the pull-out operation of the windable sunshade. It is preferably attached to the member.

Further, the roll-up sunshade is provided with a handle for taking in and out the sunshade surface, and at least part of the handle is arranged below the lower end of the cross member and the cab ceiling interior. preferably.

According to the present invention, the cross member is disposed above the cab ceiling interior between the left and right rear pillars, and the wind-up portion of the wind-up sunshade is disposed in the internal space of the cross member. That is, the wind-up portion of the wind-up sunshade is installed above the cab ceiling interior. Therefore, the wind-up portion of the wind-up type sunshade does not obstruct the view above the rear glass, and a good rearward view from the driver's seat can be ensured.

The perspective view which shows the cab of the construction machine which concerns on embodiment of this invention. The perspective view which shows a part of cab rear frame. FIG. 2 is a cross-sectional view taken along line III-III in FIG. 1; Sectional drawing which shows a cross member. The perspective view which shows a part of roll-up type sunshade. The figure which shows the winding-type sunshade in the state wound up by the winding part. The figure which shows the cross member which concerns on a modification.

<1. embodiment>
A construction machine cab according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. A cab 1 of a hydraulic excavator shown in FIG. 1 will be exemplified below as an example of a cab of a construction machine according to the present invention.

As shown in FIG. 1, a rear glass 3 is provided on the rear surface of the cab 1 in order to ensure a rear view from the driver's seat.

As shown in FIG. 2, the cab 1 has a skeleton made of steel pipes or the like to ensure the strength against overturning. Specifically, the rear portion of the cab 1 includes left and right rear pillars 2L and 2R (see FIG. 2) and a cross member 4 disposed between the left and right rear pillars 2L and 2R so as to connect the left and right rear pillars 2L and 2R. and Note that the rear glass 3 shown in FIG. 1 is provided between the left and right rear pillars 2L and 2R.

As shown in FIG. 2, the left and right rear pillars 2L, 2R are a pair of left and right C-pillars extending vertically on both left and right sides of the cab rear portion.

As shown in FIG. 3, the cross member 4 is a hollow member that is arranged above the cab ceiling interior 5 and between the left and right rear pillars 2L and 2R.

Specifically, as shown in FIG. 4, the cross member 4 is a member having a U-shaped cross section, which is composed of four surfaces 41, 42, 43, and 44 and has an opening 4H on the lower side.

The surface 41 is a surface close to the rear glass 3 . The surface 42 is a surface that bends and extends forward from the upper end of the surface 41 . The surface 43 is a surface that bends and extends downward from the front end of the surface 42 and faces the surface 41 . The surface 44 is a surface that bends and extends rearward from the lower end of the surface 43 . In addition, the surface 44 is configured to be short so as to secure the opening 4H.

As shown in FIG. 3, the cab ceiling interior 5 is attached to the surface 44 of the cross member 4 (an example of the attached portion according to the present invention) with bolts. The rear end of the cab ceiling interior 5 is positioned so as not to block the opening 4H of the cross member 4 . Therefore, the cab ceiling interior 5 does not hinder the pull-out operation of the roll-up sunshade 6 (described later). That is, the cab ceiling interior 5 is attached to the cross member 4 via the surface 44 at a position that does not interfere with the operation of pulling out the retractable sunshade 6 (described later).

In the internal space of the cross member 4, a winding portion 60 (also referred to as a sunshade main body) of a winding type sunshade 6 that shields sunlight from the rear glass 3 is installed.

As shown in FIG. 5, the roll-up type sunshade 6 includes a sunshade surface 61 drawn out from a roll-up portion 60, held portions 65 provided at both left and right ends of the lower end 6B, and a handle positioned substantially at the center of the lower end 6B. and a portion 63 .

The sunshade surface 61 is a surface that blocks sunlight entering the cab 1 through the rear glass 3 . The sunshade surface 61 is configured to be able to be pulled out through the opening 4H (see FIG. 4) of the cross member 4. As shown in FIG. The sunshade surface 61 pulled out from the winding portion 60 is arranged on the rear glass 3 side (rearward) of the rotation axis AX of the winding type sunshade 6 in the machine front-rear direction.

The held portion 65 is configured as a cylindrical member, and is configured to be able to fit into the U-shaped holding portion 21 provided inside the cab side wall (not shown). When the held portion 65 is fitted to the holding portion 21 , the sunshade surface 61 pulled out from the winding portion 60 is maintained in a state of covering the rear glass 3 .

The handle portion 63 is a portion that is gripped by an operator when the sunshade surface 61 is put in and taken out. As shown in FIG. 6 , a portion of the handle portion 63 is arranged below the lower end portion of the cross member 4 and the cab ceiling interior 5 in a state where the sunshade surface 61 is wound on the winding portion 60 . there is

According to the above-described embodiment, the cross member 4 is arranged above the cab ceiling interior 5 between the left and right rear pillars 2L and 2R, and the winding portion 60 of the windable sunshade 6 is provided in the internal space of the cross member 4. (sunshade main body) is placed. That is, the wind-up portion 60 of the wind-up sunshade 6 is installed above the cab ceiling interior 5 . Therefore, the wind-up portion 60 of the wind-up sunshade 6 does not block the view of the upper portion of the rear glass 3, and a good rearward view from the driver's seat can be ensured. In addition, when escaping from the rear glass 3 side in an emergency, it is possible to ensure a wide frontage for escaping.

Further, according to the above-described embodiment, the sunshade surface 61 pulled out from the winding portion 60 is arranged on the rear glass 3 side (rearward) of the rotation axis AX of the winding type sunshade 6 in the longitudinal direction of the machine. Therefore, it is possible to secure a large indoor space when the roll-up sunshade 6 is used. In addition, the ease of assembly of the roll-up sunshade 6 to the cross member 4 is improved.

Further, according to the above-described embodiment, since the cab ceiling interior 5 is attached via the surface 44 of the cross member 4, it is possible to minimize the number of additional parts, and the range covered by the cab ceiling interior 5 can be reduced. It is possible to secure a wide range. Further, the strength of the cross member 4 itself is improved due to the existence of the surface 44 bent backward from the lower end of the surface 43 .

Further, according to the above-described embodiment, the handle portion 63 is arranged below the lower end portion of the cross member 4 and the cab ceiling interior 5 in a state in which the sunshade surface 61 is wound on the winding portion 60 . . Therefore, accessibility to the handle portion 63 is high.

<2. Variation>
The construction machine cab according to the present invention is not limited to the above-described embodiment, and various modifications and improvements are possible within the scope of the claims.

For example, in the above embodiment, the case where the cross member 4 is composed of four surfaces 41, 42, 43, 44 (see FIG. 4) was exemplified. The cross member 4 may also consist of three faces 41, 42, 43. FIG. In this case, the cab ceiling interior 5 may be attached to the surface 43 .

Further, in the above-described embodiment, the case where a part of the handle portion 63 is arranged below the lower end portion of the cross member 4 and the cab ceiling interior 5 was exemplified. may be arranged below the lower end of the cross member 4 and the cab ceiling interior 5 .

As described above, the cab of the construction machine according to the present invention is suitable for shielding the rear glass of a hydraulic excavator or the like.

1 cab, 2L, 2R rear pillar, 3 rear glass, 4 cross member,
4H opening, 5 cab ceiling interior, 6 roll-up sunshade, 6B lower end,
21 holding portion, 41, 42, 43, 44 surfaces, 60 winding portion, 61 sunshade surface,
63 handle portion, 65 held portion, AX rotating shaft

Claims (4)

A construction machine cab comprising a retractable sunshade,
Left and right rear pillars extending vertically on both left and right sides of the cab,
a rear glass provided between the left and right rear pillars;
a hollow cross member disposed between the left and right rear pillars above the cab ceiling interior and having an opening on the lower side;
with
A winding portion of the winding sunshade is disposed in the internal space of the cross member,
A cab for a construction machine, wherein a sunshade surface of the retractable sunshade is configured to be able to be pulled out through the opening of the cross member. The roll-up type sunshade is configured such that the sunshade surface pulled out from the roll-up portion is arranged closer to the rear glass than the rotation shaft of the roll-up type sunshade in the machine front-rear direction. The cab of the construction machine according to claim 1. The cross member has a mounting portion for mounting the cab ceiling interior,
3. The construction machine according to claim 1, wherein the cab ceiling interior is attached to the cross member via the attached portion at a position that does not interfere with the pull-out operation of the retractable sunshade. cab. The roll-up sunshade is provided with a handle for taking in and out the sunshade surface,
4. The cab of the construction machine according to claim 3, wherein at least part of said handle portion is arranged below the lower end portion of said cross member and said cab ceiling interior.

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