JP3177108B2 - Cabin opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabin opening / closing device mounted on an agricultural vehicle or the like.

[0002]

2. Description of the Related Art For example, in a tractor for agricultural work, a cabin in which a driver's seat, a steering wheel, and the like are incorporated is mounted in a rear upper part of a traveling vehicle body directly connected to an engine, a clutch housing and a transmission case. The cabin is usually formed with opening frames on both left and right sides and a rear side thereof, and among these, left and right opening frames for the operator getting on and off are provided with door panels that can be opened and closed. Further, a rear window is pivotally supported on the rear opening frame so as to be able to swing up and down. The door panel and the rear window are provided with locking means for holding these at the closed position of the opening frame so as to be freely engaged and disengaged. .

In recent years, almost all surfaces of the door panel and the rear window have been made of glass panels in order to improve the livability by expanding the field of view of the operator in the cabin as much as possible. There is a tendency to adopt a frameless panel having no rigid frame such as a steel frame.

[0004]

When a frameless panel is employed as a door panel or a rear window as described above, conventionally, a weatherstrip provided on an outer peripheral edge when the door is closed is uniformly formed on an opening frame over the entire peripheral area. The frameless panel is formed as close as possible to the shape of the opening frame so as to be in close contact. For example, a simple flat glass panel is used in the rear window.

However, since the frameless panel is closed by pressing its outer peripheral edge against the opening frame by the locking means, the frameless panel is simply formed along the opening frame as described above. In this case, the panel may be elastically deformed and warped to the inside of the cabin. Therefore, the weather strip provided on the outer peripheral edge of the panel may not properly adhere to the opening frame, and the sealing property may be impaired. is there.

The present invention has been made in view of the above circumstances, and provides a cabin opening / closing device capable of improving the sealing property between the frameless panel and the opening frame by utilizing the elastic deformation of the frameless panel when closed. Aim.

[0007]

In order to achieve the above object,
The present invention has taken the following technical measures. That is, the present invention is the opening frame formed in the cabin, the door panel made of frameless panels having no rigid frame to the outer peripheral edge portion is provided so that it can open and close the opening frame from the cabin outside of the door panel In a cabin opening / closing device provided with a locking means for holding the panel at a closed position by pressing the outer peripheral edge against the opening frame, an outer peripheral edge of a door panel made of the frameless panel is opened from the outside of the cabin. At the time of contact with the frame, the door panel is formed in a curved shape such that the center portion thereof is displaced outward of the cabin from its outer peripheral edge so that the panel does not yet reach the locking position of the locking means. You
You.

Further , the present invention provides a method for controlling
At the upper edge contacts the opening frame before the lower edge
So that the door panel is pivotally attached to the
And features.

[0009]

According to the present invention, a door comprising a frameless panel is provided.
The panel 17 is formed in a curved shape in which the central portion is displaced outward of the cabin 6 from the outer peripheral edge, and when the outer peripheral edge contacts the opening frame 16 from the outside of the cabin 6, the panel 17 is still in the locked position. , The panel 17 cannot be locked unless the panel 17 is elastically deformed.

Therefore, the door panel thus formed
If 17 forcibly so as to lock in the locking means 2 1, an outer peripheral edge portion is forcibly pressed against the opening frame 1 6 by the internal stress caused by the elastic deformation. In the present invention,
When the upper panel 17 is closed, its upper edge is ahead of the lower edge.
The door panel 17 is brought into contact with the opening frame 16 at the opening frame.
Since the door panel 17 is pivotally mounted on the support column 12 of the
The upper edge is pressed against the opening frame 16 more strongly than the lower edge.
You.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A shows the rear half of the agricultural tractor 1 in which the switchgear of the present invention is employed.
Has a traveling body 5 directly connected to the engine 2 and a transmission case 4 having a power transmission mechanism for transmitting the power of the engine 2 to the rear wheels 3. A cabin 6 is mounted on a rear upper portion of the traveling vehicle body 5, and a front upper portion of the traveling vehicle body 5 is covered with a bonnet 7.

The cabin 6 is removably mounted via a cushion on a support bracket (not shown) protruding left and right from the front of the transmission case 4 and a mounting table mounted on the rear axle case. In this cabin 6,
The cockpit, steering wheel 8 pedals, and operating devices are incorporated. The cabin 6 is framed by a cabin frame 9 in which a rectangular pipe material having a hollow cross section is framed into a substantially rectangular parallelepiped.

The cabin frame 9 includes a pair of left and right front supports 1.
0 and rear struts 11 and a pair of left and right intermediate struts 12 located between them, and these struts 10, 11, 1
The two upper ends are connected to each other by a rectangular upper frame 13 and the lower ends are connected to each other by a lower frame bent along a fender 14.
A roof 15 is provided on the upper frame 13. Of the left and right side surfaces of the cabin 6, the front support 10 and the intermediate support 12
Between the front side opening frame 16 as a pilot entrance
A door panel 17 for covering the opening frame 16 so as to be openable and closable is pivotally supported on the intermediate support 12 via a hinge 18. On the other hand, a side rear opening frame 19 is formed between the intermediate support 12 and the rear support 11, and the opening frame 19 is closed by a rear side panel 20.

A front glass (not shown) is fitted in a front frame defined by the left and right front columns 10 and upper and lower frames. A door lock (locking means) 21 for locking the panel 17 to the front side opening frame 16 in a detachable manner is provided substantially at the center of the front part of the door panel 17 in the vertical direction. When the panel 17 is locked, a later-described weather strip 28 provided on the outer peripheral edge of the panel 17 is pressed against the front side opening frame 16, thereby sealing between the panel 17 and the side front opening frame 16. It has become.

As shown in FIG. 2, the front column 10 is bent in an outwardly protruding letter shape when viewed from the front (left side in FIG. 1A). 1
7 is also bent so that its upper and lower center portions protrude outward. On the other hand, on the rear surface of the cabin 6, a rear opening frame 22 having a rectangular shape as viewed from the rear is defined by a pair of left and right rear columns 11 and upper and lower frames. A rear window 23 is pivotally attached to the upper chord material of the opening frame 22 so as to be vertically swingable. A damper 24 for absorbing a shock to the rear opening frame 22 is connected to a middle portion of the rear window 23 in the vertical direction. I have.

At the center in the width direction of the lower portion of the rear window 23, there is provided a window lock (lock means) 25 for removably locking the window 23 to the rear opening frame 22. As shown in FIG. 1B, the bracket 26 includes a U-shaped bracket 26 fixed to the inner surface of the rear window 23 and an operation handle 27 rotatably provided on the bracket 26.

The operating handle 27 is rotated to lock a locking piece formed at the shaft end of the operating handle 27 on the rear opening frame 22 side.
2 can be locked. At this time,
A later-described weather strip 28 provided on the outer peripheral edge of the rear window 23 is pressed against the rear opening frame 22, thereby sealing between the rear window 23 and the rear opening frame 22.

The door panel 17 and the rear side panel 2
The rear window 23 and the rear window 23 are formed of a transparent glass frame that does not have a rigid metal frame as in the case of the outer peripheral edge so that the field of view of the operator in the cabin 6 can be expanded as much as possible. Only the rubber weatherstrip 28 fixed around the entire outer periphery is provided on the outer peripheral edge.

The rear window 23 is shown in FIG.
As shown in (b), the center portion is formed in a curved shape so as to be displaced slightly outward of the cabin 6 from the outer peripheral edge in the width direction. When the rear window 23 comes into contact with the rear opening frame 22 from outside, the rear window 23 is set so as not to reach the lock position of the window lock 25 yet.

The curvature of the glass material can be imparted by, for example, biasing the air pressure for cooling at the time of manufacturing the glass to one side. As described above, the rear window 23 of the present embodiment has the cabin 6 at the center in the width direction.
Since the rear window 23 is curved in advance so as to expand outward, the rear window 23 is not locked unless the rear window 23 elastically deforms and returns to a substantially flat surface.

For this reason, if the rear window 23 is forcibly locked, the internal stress generated at the time of its elastic deformation causes the weather strip 28 to be forcibly pressed particularly to the right and left sides of the rear opening frame 22, and Wind 23
And the rear opening frame 22 will have improved sealing performance. On the other hand, as shown in FIG.
By bending the upper and lower central bent portions 29 slightly more than the corresponding bent portion 30 of the front support column 10, the central portion in the vertical direction is curved so as to be displaced slightly outward of the cabin 6 from the outer peripheral edge. I have.

That is, in the case of the door panel 17, the hinge 18 and the door lock 21 are provided, in particular, FIG.
Are strongly pressed against the front side opening frame 16 at three points A, B, and C shown in FIG.
It tends to warp sideways. Therefore, in the present embodiment, as described above, the door panel 17 is curved in advance so that the center in the vertical direction expands outward of the cabin 6, and when the panel 17 is forcibly locked, the upper and lower portions of the panel 17 are particularly forcibly locked. It is designed to be in pressure contact with the side front opening frame 16.

In this embodiment, as shown with time in FIG. 2, the point D of the door panel 17 is first set to the side front opening frame 1.
6 (FIG. 2 (a)), then point E contacts the same opening frame 16 (FIG. 2 (b)).
The door panel 17 is pivotally attached to the intermediate support 12 so that the point contacts the opening frame 16 (FIG. 2C). This is because the door lock 17 is provided below the vertical center, and the distance between the CDs is longer than the distance between the CEs. Further, since the upper part of the door panel 17 is more likely to be exposed to rainwater, it is strongly desired that point D be more waterproof than point E.

The present invention is not limited to the above embodiment, and the rear window 23 may be curved in the vertical direction. The point is that the bending direction of the panel may be set in consideration of the position where the locking means 21 and 25 are provided and which part of the outer peripheral edge of the panel is most effectively pressed against the panel. It may be formed in a spherical shape curved in the direction.

Further, the weather strip 28 is connected to the opening frame 1.
6 and 22 side, door panel 17 and rear window 2
3 may be composed of only a glass material. If the sunlight from behind the cabin 6 is strong, the driver's own image may appear on the windshield, making it difficult to drive.
In order to prevent such a phenomenon, the rear window 23 may be made of dark colored glass.

[0026]

As described above, according to the present invention,
Simply by forcibly locking the door panel 17 made of a frameless panel with the locking means 21 , the outer peripheral edge is forcibly pressed against the opening frame 16 by the internal stress caused by its elastic deformation, and the panel 17 and the opening are opened. The sealing performance with the frame 16 can be improved. Further, according to the present invention, the door pad
The upper edge of the flannel 17 is pressed against the opening frame 16 more strongly than the lower edge.
Door panels 17 that are easily exposed to rainwater.
The waterproof property of the upper side can be effectively secured.

[Brief description of the drawings]

FIG. 1A is a side view showing a rear part of a tractor,
(B) is a sectional view taken along line XX of (a).

FIG. 2 is a front sectional view showing an order of contact of a door panel with an opening frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 6 Cabin 16 Side front open frame 17 Door panel 21 Door lock (lock means) 22 Rear open frame 23 Rear window 25 Wind lock (Lock means) 28 Weather strip

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60J 1/00 B60J 1/18 E06B 7/23

Claims (1)

(57) [Claims] An opening frame (1) formed in a cabin (6).
6 ) The door panel (17) made of a frameless panel having no rigid frame on the outer peripheral edge is provided with the opening frame (16 ).
Is provided so that it can be opened and closed from the outside of the cabin (6),
The outer peripheral edge of the door panel (17) is connected to the opening frame (1).
6 ) In a cabin opening / closing device provided with a lock means (21 ) for holding the panel (17) in a closed position by pressing the same against the cabin (17) , the outer peripheral edge of the door panel (17) composed of the frameless panel is provided. 6) Opening frame (16 ) from outside
So as not to reach the locked position of the panel (17) is still the locking means (21) at the time of contact with, the Doapa
Panel (17), the center portion is formed in a curved shape which is displaced to the cabin (6) outward than the outer peripheral edge, an upper edge and the lower at the time of closing of the door panel (17)
So that it comes into contact with the opening frame (16) before the edge.
The door panel (17) is supported by the support (12) of the opening frame (16).
A cabin opening / closing device, which is pivotally mounted on the cabin.