JP2009202852A - Door opening/closing device of vehicular cabin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the opening / closing operation by performing a light opening / closing operation of a cabin door, eliminating the occurrence of door glare at the time of opening.
An open / close door 15 is provided on a lateral side portion of a cabin 7 so as to be openable and closable. The open / close door 15 is attached to a cabin side frame 14 and 10 by two upper and lower hinges 18 and 19 provided at predetermined intervals in the vertical direction. Attach and provide support plates 20 and 20 at or near these upper and lower hinges 18 and 19, and between the support plate and the cabin side frame, expandable and contractible gas dampers 21 and 22 are pivotally supported. To be provided.
[Selection] Figure 3

Description

  The present invention relates to a cabin door opening and closing device in a work vehicle such as a tractor.

Conventionally, for example, in Patent Document 1, a door that is openable and closable in a cabin is attached to a cabin side frame by a plurality of upper and lower hinges, and a bracket is provided on a lower hinge. There is disclosed a door opening and closing device having a configuration in which a gas damper is pivotally supported between the gas dampers.
JP 2006-169794 A

  The conventional door opening / closing device has a problem that the door is opened / closed by a single gas damper, so that the door opening / closing operation is heavy, and the opening / closing operation is unstable, resulting in unstable opening / closing operation. An object of the present invention is to perform a door opening / closing operation lightly, eliminate the occurrence of door glare when opened, and stabilize the opening / closing operation.

In order to solve the above problems, the present invention has taken the following technical means.
That is, according to the first aspect of the present invention, the open / close door (15) is provided on the lateral side of the cabin (7) so as to be openable and closable. Two hinges (18) and (19) are attached to the cabin (7) side, and support plates (20a) and (20b) are provided in the vicinity of the upper and lower hinges (18) and (19), respectively. The lower frame (8), the fender frame (10) of the left and right fenders (9) covering the rear wheel (4), and the vertical frames (11), (12) erected from the lower frame 8 and the fender frame (10) And a roof frame (14) for connecting the upper ends of the vertical frames (11), (12), and an upper gas damper capable of extending and contracting the upper support plate (20a) and the roof frame (14). (22), the lower support plate (20a) and the fender frame (10) are connected by a lower gas damper (21).

  When the open / close door is opened, it is opened by the extension operation of the upper and lower gas dampers (22) and (21), and when it is closed, it is closed by the reduction operation. Since the open / close door (15) is opened and closed by the expansion and contraction operation of the upper and lower gas dampers, it can be opened and closed with a light operating force, and the door side mounting portion of the upper and lower dampers is set at or near the hinge, There is no grazing on the door when opened, and the opening and closing operation is smooth and a stable opening degree is maintained.

According to a second aspect of the present invention, in the first aspect, the cabin side mounting portion of the lower gas damper (21) is set in the interior cover (25) of the cabin chamber.
When the open / close door (15) is opened, the lower damper (21) is partially exposed to the outside, but when the open / close door is closed, substantially the entire lower gas damper is accommodated in the interior cover (25). It will be.

  Therefore, it is not deformed by holding the damper during driving or getting on and off, and the appearance is improved.

  In short, according to the first aspect of the present invention, since the open / close door is opened and closed by the expansion and contraction operation of the upper and lower gas dampers, it can be opened and closed with a light operating force, and the door side mounting portion of the upper and lower dampers is a hinge. Since the doors are set close to each other, there is no glare on the door when opened, and the opening / closing operation can be performed smoothly and a stable opening degree can be maintained.

  According to the present invention of claim 2, while exhibiting the effects of the invention of claim 1, it is possible to prevent the damper from being deformed without holding the damper during operation and being used as an armrest or as a support when getting on and off. be able to. When the open / close door is closed, the damper is hidden in the interior cover, so that the appearance is improved.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a tractor. An engine is mounted inside a bonnet 2 at the front of the traveling vehicle body 1, and the rotational power of the engine is transmitted to a transmission in a transmission case. The power is transmitted to the front wheel 3 and the rear wheel 4. A steering handle 5 for steering the front wheels 3 and 3 is provided behind the bonnet 2, and a driver's seat 6 is installed behind the steering handle 5.

  The cabin 7 that covers the steering wheel 5 and the upper part of the driver's seat 6 includes a lower frame 8 that is supported along the vehicle body 1, a fender frame 10 of the left and right fenders 9 that cover the rear wheels, and the lower frame 8 and the fender frame 10. Before, middle and rear vertical frames 11, 12, 13 and a roof frame 14 connected between the upper ends of the vertical frames 11, 12, 13 and so on. It has a structured structure. Reference numeral 15 denotes an open / close door 16 provided on the left and right sides of the cabin so as to be freely opened and closed, and 17 denotes a rear glass.

  The open / close door 15 is composed of a door glass 15a and a surrounding door frame 15b, and is provided with an upper hinge 18 and a lower side pivotable about a vertical axis P in the vertical direction provided at a predetermined interval in the vertical direction. It is attached to the vertical frame 12 by a hinge 19. An upper support plate 20 a and a lower support plate 20 b are provided near the upper hinge 18 and the lower hinge 19 of the opening / closing door 15, and the upper and lower support plates 20 a and the roof frame 14 can be expanded and contracted. A gas damper 22 is pivotally supported via mounting pin shafts 23a and 24a so as to be rotatable.

Further, an expandable and contractible upper gas damper 21 is pivotally supported between the lower support plate 20b and the fender frame 10 via mounting pin shafts 23b and 24b.
The upper gas damper 21 is positioned higher than the upper hinge 18, and the lower gas damper 22 is positioned lower than the lower hinge 19, so as not to prevent the driver from getting on and off. Yes.

  The gas damper 21 on the lower side is set so that the cabin side mounting portion (mounting pin shaft 24b) of the damper is positioned inside the interior cover 25 of the cabin chamber at the inner position of the fender 9, and the open / close door 15 is closed. Sometimes, almost the entire area of the gas damper 21 is stored under the interior cover 25.

  The door-side support plate 20 to which the lower gas damper 21 is attached is integrally formed with the lower hinge bracket 19 in the embodiment, and the support plate 20 has, as shown in FIG. By providing a plurality of damper mounting holes 26a and 26b, the mounting fulcrum of the damper with respect to the mounting pin shaft 23 can be arbitrarily changed, and the opening degree of the open / close door can be adjusted. Also, on the cabin frame side, the opening degree of the open / close door can be easily adjusted by configuring the mounting stay 27 of the damper mounting pin shaft 24 so as to be freely changeable and fixed.

  In the embodiment shown in FIG. 7, before the extension stroke of the gas damper 21 when the door is opened, the stopper 28 of the hinge bracket 19 is provided so as to be in contact with the cabin side frame first. It is configured to reduce shaking. If this stopper is made of an elastic material, backlash and vibration of the hinge portion can be absorbed.

  Inside the opening / closing door 15, a door opening / closing frame 30 is provided along the lateral direction at an intermediate portion in the vertical direction of the door, and via a fixing tool 29 of the hinge bracket 19 and a fixing tool 31 on the door open end side. It is firmly supported. Further, as shown in FIG. 8, a door frame 33 is provided outside the open / close door 15 so as to straddle the upper and lower portions of the intermediate bent portion 15 </ b> R that is convex toward the outside of the door glass on the door lock handle 32 side. Yes. The door frame 33 is attached to the door glass along the vertical direction, but the upper end side can share the attachment portion by using the fixture 31 on the door opening / closing frame 30 side, and can be retrofitted. . Moreover, since it mounts over the bending part of a door glass, the deflection | deviation to the outer side of glass can be suppressed.

  Further, as shown in FIG. 9, the inner door frame 34 is attached inside the open / close door so as to straddle the upper and lower portions of the intermediate bent portion of the door glass at a position corresponding to the outer door frame 33. Even in such a configuration, the attachment portion of the door frame can be shared, and the deflection to the inside of the door glass can be suppressed.

  In the embodiment shown in FIG. 10, the outer door frame 33 and the inner door frame 34 are clamped and fixed by sandwiching the door glass 15a from inside and outside by a cushioned bolt 36 provided with cushioning materials 35, 35 such as rubber. . According to this, the fastening fixed state of the inner and outer door frames can be adjusted according to the shape of the glass. In the embodiment shown in FIG. 11, the inner door frame 34 is shaped to be inside the door lock cover 38 of the door lock mechanism 37 so as not to prevent the operator from getting on and off.

  12 and 13, the front frame 11 of the cabin and the lower portion of the floor step 40 (the upper end portion of the sub-step member 41) are connected and connected by a reinforcing pipe 42. The reinforcing pipe 42 has a lower end side in front. Along the outer surface of the frame 11, the upper end side is extended outward from the middle to provide a gripping function. As a result, the strength of the cabin frame can be increased, and it is possible to get on and off with the gripping portion 42a of the reinforcing pipe, so that the boarding / exiting property is improved.

  14 and 15 show a working vehicle equipped with a crawler type traveling device 43 in place of the rear wheel below the rear wheel fender 9, and behind the sub-step member 41 and the front end of the crawler 43. By providing an auxiliary fender 44 connected to the front end of the rear wheel fender 9 between the upper side and the upper side, the scattered mud from the crawler is prevented from accumulating on the sub-step when scraping.

  FIG. 16A shows a conventional fender frame structure, and FIG. 16B shows the fender frame structure of this example. The fender frame 10 of this example is a trim in which the upper wall 10a of the square pipe is bent downward to form a deformed frame. 46 is covered. According to this, the trim is not exposed to the upper side as in the prior art, the aesthetics are good, and the fender frame itself is also rigidly held with increased rigidity.

  As shown in FIGS. 17 to 19, a cabin hanging hook 48 is installed on the lateral outer side of the rear portion of the cabin, and is integrally fixed and supported on the upper end of the middle frame 12 to which the open / close door 15 is attached. In this embodiment, the rear combination lamp 49 is installed in the existing hanging hook 48 to protect the outside of the lamp and prevent damage or the like.

  As another embodiment, as shown in FIGS. 20 to 22, the periphery of the rear combination lamp 49 is covered with a guard 51 attached to a support bracket 50 protruding from the cabin side frame 12. A cabin suspension hook 48 may be installed on the upper part of the engine 51.

Tractor side view Cabin side view A perspective view when the cabin door is open A perspective view of the main part of the cabin A perspective view of the main part of the cabin when the door is opened A perspective view of the main part of the cabin Plan view of the main part of the cabin when the door is opened Perspective view seen from outside of open / close door Perspective view seen from the inside of the open / close door Front view showing the door frame mounting state of the open / close door Front view of main part of open / close door A perspective view of the main part of the cabin Same as above Perspective view of main part of tractor with crawler type traveling device Top view of the main part (A) Cross-sectional view of a conventional fender frame, (b) Cross-sectional view of the fender frame of this example Front perspective view of the main part of the cabin Rear side perspective view of the main part of the cabin Side view of the main part of the cabin Front view of cabin Side perspective view of the main part of the cabin Rear side perspective view of the main part of the cabin

Explanation of symbols

4 Rear wheel 7 Cabin 9 Fender 10 Cabin side frame (fender frame)
14 Cabin side frame (roof frame)
15 Open / close door 18 Hinge (upper)
19 Hinge (bottom)
20 Support plate 21 Gas damper (bottom)
22 Gas damper (top)
25 Interior cover

Claims (2)

An openable / closable door (15) is provided on the lateral side of the cabin (7) so that the openable / closable door can be opened and closed. (7) It attaches to the side and provides support plates (20a) and (20b) in the vicinity of these upper and lower hinges (18) and (19), respectively.
The cabin (7) includes a lower frame (8), a fender frame (10) of left and right fenders (9) covering the rear wheel (4), and a vertical frame (11) standing from the lower frame 8 and the fender frame (10). ), (12) and a roof frame (14) for connecting the upper ends of the vertical frames (11), (12),
The upper support plate (20a) and the roof frame (14) are connected by an extendable upper gas damper (22), and the lower support plate (20a) and the fender frame (10) are connected by the lower gas damper (21). A vehicle cabin characterized by being connected.   The cabin for a vehicle according to claim 1, wherein the cabin side mounting portion of the lower gas damper (21) is set in the interior cover (25) of the cabin (7) chamber.

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