JP7180441B2 - Construction machine cab - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement in waterproofness and dustproofness in cabs of construction machinery.

2. Description of the Related Art Conventionally, some cabs of construction machinery have a front window that is divided into an upper window and a lower window, the lower window is detachably attached, and the upper window is slidably openable and closable. In order to prevent water and dust from entering such a cab, vertical side seal members extending vertically are provided between the left and right ends of the front window and the window frame. is provided with a lateral intermediate seal member extending in the left-right direction.

However, since part of the vertical side seal member overlaps part of the horizontal intermediate seal member at both left and right ends of the front window, the vertical side seal slightly floats due to the thickness of the horizontal intermediate seal member, creating a gap. There is a problem that water and dust enter through the gap.

On the other hand, in Patent Document 1, the gap (G) formed between the intermediate seal member (54) and the elastic frame (43) when the front window (48) is arranged in the closed window position is closed. Closing members (60, 60) are provided to prevent rainwater and the like from entering.

JP-A-2002-88815

According to Patent Document 1, although the upper gap formed between the upper end of the horizontal intermediate seal member and the vertical side seal member can be expected to be waterproof and dustproof, the lower end and the vertical side of the horizontal intermediate seal member can be expected to be waterproof and dustproof. Waterproofness and dustproofness cannot be expected for the lower gap formed between the sealing member.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cab for a construction machine having higher waterproof and dustproof properties.

In order to achieve the above object, the present invention provides a cab for construction machinery, comprising a window frame provided on the front surface of the cab, an upper window provided above the window frame, and an upper window provided below the upper window. an elastic lateral intermediate sealing member extending in the left-right direction so as to seal between the lower end of the upper window and the upper end of the lower window; and the surface of the front window. and an elastic vertical side seal member extending vertically between the left and right ends constituting the window frame and a portion facing the surface of the front window for sealing, the vertical side seal In the overlapping region where a part of the member overlaps a part of the lateral intermediate seal member, the lower end of the upper window, the upper end of the lower window and the lateral intermediate seal member are inclined upward toward the side of the cab. To provide a construction machine cab characterized by:

Here, at least two contact lines extending in the vertical direction are formed in the vertical side seal member so as to be in pressure contact with the surface of the front window and the horizontal intermediate seal member. It is preferable that the contact lines are formed more in the predetermined area including the area than in the area other than the predetermined area.

Moreover, it is preferable that the predetermined area is wider than the area other than the predetermined area.

According to the present invention, the lower end of the upper window, the upper end of the lower window, and the transverse intermediate seal member rise toward the side of the cab in the overlap region where a portion of the vertical side seal member overlaps a portion of the transverse intermediate seal member. configured to incline. Therefore, compared to when the lower end of the upper window, the upper end of the lower window, and both ends of the horizontal intermediate seal member are horizontal, the intrusion of water and dust due to the horizontal railing is prevented, and as a result, high waterproof and dustproof properties are achieved. It is possible to obtain

1 is a schematic side view showing a hydraulic excavator according to an embodiment of the present invention; FIG. The perspective view which shows the cab of a hydraulic excavator. The front view which shows the cab of a hydraulic excavator. FIG. 4 is an enlarged view of the dashed line area of FIG. 3 with the window frame removed; FIG. 4 is an enlarged cross-sectional view taken along the line VV of FIG. 3; FIG. 6 is an enlarged cross-sectional view taken along the line VI-VI of FIG. 5; The figure which looked at FIG. 4 from the indoor side. The VI-VI line cross-sectional enlarged view concerning a modification. The figure for demonstrating the contact line of the vertical side-seal 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 7. FIG. Hereinafter, the hydraulic excavator 10 shown in FIG. 1 is illustrated as an example of the construction machine according to the present invention, and the cab 14 shown in FIG. 2 is illustrated as an example of the cab. In each drawing, the longitudinal direction and lateral direction of the machine (cab) are appropriately defined.

A hydraulic excavator 10 includes a lower running body 11 and an upper revolving body 12 mounted on the lower running body 11 so as to be able to turn. The upper revolving body 12 is provided with an upper frame 18 , and the cab 14 is installed on the upper frame 18 .

As shown in FIG. 2, the cab 14 is a rectangular box-shaped driver's cab and includes a main body 14a. A substantially rectangular window frame 20 that holds a front window 40 is provided on the front surface of the main body 14a.

As shown in FIG. 3 , the front window 40 includes an upper window 41 arranged above the window frame 20 and a lower window 45 arranged below the upper window 41 . In the following description, in the upper window 41 and the lower window 45, the surface on the outside (front side) of the cab will be referred to as the front surface, and the inside (rear side) of the cab will be described as the back surface.

The upper window 41 is configured to be slidable between a closed position that closes the opening in the window frame 20 together with the lower window 45 and an open position that retreats toward the ceiling of the main body 14a. On the other hand, the lower window 45 is detachably attached to the window frame 20, and unlike the above-described upper window 41, it does not slide open and close.

As shown in FIG. 4 , the left end portion of the lower end 41L of the upper window 41 is inclined upward toward the left end side of the cab 14 . Similarly, the left end portion of the upper end 45U of the lower window 45 is also inclined upward toward the left end side of the cab 14 . Although not shown, the upper window 41 and the lower window 45 are bilaterally symmetrical. It slopes upwards.

Please refer to FIG. 3 again. The window frame 20 includes vertical side frame members 21 (21L, 21R) extending in the vertical direction on both left and right sides, an under frame member 23 connecting the lower ends of the vertical side frame members 21L, 21R and extending in the horizontal direction, and vertical sides. An upper frame member 24 connecting the upper ends of the frame members 21 and extending in the left-right direction is provided.

As shown in FIG. 3, an elastic sealing member 30 is provided in the gap between the window frame 20 and the front window 40 for the purpose of preventing water and dust from entering. The seal member 30 includes vertical side seal members 31 (31L, 31R), a horizontal intermediate seal member 34, and an under seal member (not shown).

The horizontal intermediate sealing member 34 is an elastic sealing member extending in the left-right direction so as to seal the gap between the lower end 41L (FIG. 4) of the upper window 41 and the upper end 45U (FIG. 4) of the lower window 45. be.

The lateral intermediate seal member 34 is provided along the lower end 41L of the upper window 41, and as shown in FIG. ing.

When the upper window 41 moves from the open position to the closed position (positions shown in FIGS. 3 and 5), the lateral intermediate sealing member 34 presses against the upper end 45U of the lower window 45, and as shown in FIG. is elastically deformed so as to sandwich the upper end 45U side of the . As a result, the gap between the lower end 41L of the upper window 41 and the upper end 45U of the lower window 45 is sealed by the horizontal intermediate sealing member 34 .

Note that when the upper window 41 moves from the closed position (the position shown in FIGS. 3 and 5) to the open position (on the ceiling side of the cab 14), the horizontal intermediate seal member 34 fixed to the lower end 41L of the upper window 41 is moved from the upper window. Following the sliding movement of 41, the upper window 41 moves to the ceiling side.

As shown in FIG. 4, the left end portion of the horizontal intermediate seal member 34 is inclined upward toward the left end side of the cab 14 along the shape of the lower end 41L of the upper window 41 and the upper end 45U of the lower window 45. there is Although not shown, the right end portion of the horizontal intermediate seal member 34 is also inclined upward toward the right end side of the cab 14 . In this manner, both ends of the lateral intermediate seal member 34 are inclined upward toward the sides of the cab 14 along the shapes of the lower end 41L of the upper window 41 and the upper end 45U of the lower window 45. there is

Further, in the present embodiment, portions of the vertical side seal members 31 (31L, 31R) overlap portions of the horizontal intermediate seal members 34 at both left and right end portions of the front window 40 . In FIG. 4 , the overlap region LP where the vertical side seal member 31 overlaps the horizontal intermediate seal member 34 at the left end of the front window 40 is indicated by diagonal hatching. Also, in the vicinity of the overlapping region LP, the upper gap S1 formed on the upper end 34U side of the horizontal intermediate seal member 34 and the lower gap S2 formed on the lower end 34L side are indicated by hatching of a lattice.

Next, the vertical side seal members 31 (31L, 31R) will be described in detail. The vertical side seal members 31 (31L, 31R) are elastic seal members provided on the vertical side frame members 21 (21L, 21R) described above and pressed against the surfaces of the left and right sides of the front window 40. As shown in FIG.

The vertical side seal member 31 extends vertically between the bracket 21a (the portion facing the surface of the front window 40) (see FIG. 6) forming part of the vertical side frame member 21 and the surface of the front window 40. exist and close.

As shown in FIG. 6, the vertical side seal member 31 is integrally formed with a mounting base portion 31b and a hollow seal portion 31c.

The mounting base portion 31b has a substantially U-shaped cross section. The end of the bracket 21a of the vertical side frame member 21 is inserted into the opening side of the mounting base 31b.

The hollow seal portion 31c has a hollow, substantially annular shape and is formed continuously with the mounting base portion 31b. The hollow seal portion 31c is elastically deformed when pressed by the upper window 41, the lower window 45, and the lateral intermediate seal member 34, and is configured to enhance the close contact with each.

FIG. 7 is a schematic view of the upper window 41, the lower window 45, the horizontal intermediate seal member 34, and the vertical side seal member 31 as viewed from the interior side of the cab 14. As shown in FIG.

In FIG. 7, for convenience of explanation, the upper window 41 and the lower window 45 are indicated by a thick solid line, the horizontal intermediate seal member 34 is indicated by a dotted line, and the vertical side seal member 31 (hollow seal portion 31c) is indicated by a dashed line. there is Also, the overlap region LP where the vertical side seal member 31 overlaps the horizontal intermediate seal member 34 is indicated by diagonal hatching. Further, in the vicinity of the overlapping region LP, the upper gap S1 formed on the upper end 34U side of the horizontal intermediate seal member 34 and the lower gap S2 formed on the lower end 34L side are indicated by hatching of a lattice.

As shown in FIG. 7, when the hollow seal portion 31c is pressed against the upper window 41, the lower window 45 and the lateral intermediate seal member 34, the hollow seal portion 31c has the upper window 41, the lower window 45 and the lateral seals. Two contact lines (also called lip lines) LN1 and LN2 are formed which are pressed against the intermediate seal member 34 and extend in the vertical direction. The hollow seal portion 31c contacts the upper window 41, the lower window 45 and the lateral middle seal member 34 via two contact lines.

In addition, in the overlapping region LP, the left end portion of the lower end 41L of the upper window 41 and the left end portion of the upper end 45U of the lower window 45 are inclined upward toward the side of the cab 14 .

More specifically, the lower end 41L of the upper window 41 and the upper end 45U of the lower window 45 are inclined upward from a position PS closer to the center line of the cab 14 than the overlapping area LP toward the side (left end) of the cab 14. there is Along with this, the left end portion of the horizontal intermediate seal member 34 interposed between the lower end 41L of the upper window 41 and the upper end 45U of the lower window 45 also rises from the above-described position PS toward the side (left end) of the cab 14. Inclined. Further, since the left end portion of the lateral intermediate seal member 34 is inclined upward, the upper gap S1 and the lower gap S2 are also inclined upward. Although not shown, the same applies to the right end of the cab 14 as well. Portions of the lateral intermediate seal member 34 other than both ends extend horizontally along the shapes of the lower end 41L of the upper window 41 and the upper end 45U of the lower window 45 .

According to the above-described embodiment, in the overlap region LP where a portion of the vertical side seal member 31 overlaps a portion of the horizontal intermediate seal member 34, the lower end 41L of the upper window 41, the upper end 45U of the lower window 45, and the horizontal intermediate seal are formed. The member 34 is configured to be inclined upward toward the sides of the cab 14 (left end and right end). As a result, the upper gap S1 and the lower gap S2 are also inclined upward, and the lower end 41L of the upper window 41, the upper end 45U of the lower window 45, and both ends of the horizontal intermediate sealing member 34 are more horizontal than those of horizontal ones. It is difficult for the accompanying water and dust to enter, and as a result, it is possible to prevent dripping into the room and to obtain high waterproof and dustproof properties.

<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, as shown in FIGS. 6 and 7, two contact lines LN1 and LN2 are formed in the vertical side seal member 31 (hollow seal portion 31c). not.

As shown in FIGS. 8 and 9, in the vertical side seal member 31, a predetermined region including the overlapping region LP (for example, the overlapping region LP and its upper and lower parts) is configured to be wider than other regions. , two contact lines LN3 and LN4 may be formed between the contact lines LN1 and LN2.

According to the modified example described above, the number of passages of water and dust through the gaps S1 and S2 increases from two to four as the number of contact lines increases. Water and dust are gradually reduced each time they pass through gaps S1 and S2 (pressurized water is gradually decompressed during heavy rain or car washing), so the more times they pass, the more water and dust enter. As a result, it is possible to obtain high waterproof and dustproof properties.

Further, according to the modified example described above, since the predetermined region of the vertical side seal member 31 including the overlapping region LP is wider than the region other than the predetermined region, the intervals between the contact lines LN1 to LN4 are reduced. It is possible to make it wider. If the intervals between the contact lines LN1 to LN4 are wide, it becomes difficult for water and dust to reach them, and as a result, high waterproofness and dustproofness can be obtained.

Note that the number of contact lines in the modified example described above is merely an example, and is not limited to the number described above. Two or more contact lines (for example, three lines) may be formed in a region other than the predetermined region including the overlapping region LP in the vertical side seal member 31. In that case, more contact lines may be formed in the predetermined region. Lines (for example, 5 lines) may be formed.

In the above embodiment, as shown in FIGS. 4 and 7, the lower end 41L of the upper window 41, the upper end 45U of the lower window 45, and both ends of the lateral intermediate seal member 34 are linearly inclined upward. was exemplified, but is not limited to this. For example, the lower end 41L of the upper window 41, the upper end 45U of the lower window 45, and both ends of the horizontal intermediate seal member 34 may be configured to curve upward while forming an R shape. Even in that case, the same effect as the above embodiment can be obtained.

As described above, the cab of the construction machine according to the present invention is suitable for a cab or the like in which the front window is divided into an upper window and a lower window.

10 Hydraulic Excavator 11 Lower Running Body 12 Upper Revolving Body 14 Cab 14a Main Body 18 Upper Frame 20 Window Frame 21 Vertical Side Frame Material
21L, 21R vertical side frame material, 21a bracket, 23 under frame material,
24 upper frame member, 30 seal member, 31 vertical side seal member,
31b mounting base, 31c empty seal portion, 34 lateral intermediate seal member, 40 front window,
41 upper window, 45 lower window, LN1-LN4 contact line, LP overlap region, PS position, S1 upper gap, S2 lower gap

Claims (3)

A cab for a construction machine,
The window frame provided on the front of the cab,
a front window having an upper window arranged above the window frame and a lower window arranged below the upper window;
an elastic lateral intermediate sealing member extending in the left-right direction so as to seal between the lower end of the upper window and the upper end of the lower window;
An elastic left vertical side seal member and a right vertical side seal member extending vertically between the surface of the front window and portions of the left and right ends of the window frame that face the surface of the front window for sealing. a side seal member ;
with
In a left overlap region where a portion of the left vertical side seal member overlaps a left portion of the horizontal intermediate seal member in the left-right direction, the lower end of the upper window, the upper end of the lower window, and the horizontal intermediate seal member configured to slope upwards towards the left end of the
In a right overlap region where a portion of the right vertical side seal member overlaps a portion of the lateral middle seal member on the right in the left-right direction, the lower end of the upper window, the upper end of the lower window, and the lateral intermediate seal member A cab for a construction machine, characterized in that it is configured to slope upward toward the right end of the cab . At least two contact lines extending in the vertical direction are formed on the vertical side seal member and pressed against the surface of the front window and the horizontal intermediate seal member,
2. The vertical side seal member according to claim 1, wherein a predetermined region including the overlapping region of the vertical side seal member is configured such that more contact lines are formed than regions other than the predetermined region. Cabs for construction machinery. 3. The cab of the construction machine according to claim 2, wherein said predetermined area is wider than areas other than said predetermined area.

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