JP3204874B2 - Cabin door equipment - 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 door device mainly used for a tractor.

[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 formed with opening frames on both left and right sides that constitute a doorway, and a door panel is attached to the opening frame via a hinge so that the doorway can be opened and closed from outside the cabin. A door lock is provided at the outer end of the swing of the door panel, and the door panel is pressed against the opening frame by the door lock to close the opening frame.

In recent years, in order to improve the operability and livability by expanding the field of view of the pilot in the cabin as much as possible, a glass panel is used as a door panel, and a steel panel is formed on the outer peripheral edge thereof. There is a tendency to adopt a frameless panel having no rigid frame such as a frame. In such a door panel, a sealing material made of a weather strip is provided over the entire outer peripheral edge.

[0004]

When a frameless panel is employed as the door panel, the weather strip of the door panel is properly adhered to the opening frame in the vicinity of the hinge and the door lock. Since the rigidity is smaller than the above, the weather strip on the upper end side or the lower end side of the door panel may not properly adhere to the opening frame due to the warpage of the door panel, and the sealing property may be impaired. In the case of a door panel having a steel frame on the outer peripheral edge, a stopper for regulating the opening amount of the door panel by abutting against the steel frame could be provided, but a similar stopper was adopted for a frameless panel. Then, there is a high possibility that a concentrated load acts on the abutting portion of the panel with the stopper to cause breakage.

Therefore, the present invention can improve the sealing performance between the door panel and the opening frame by utilizing the elastic deformation of the door panel when closed, and prevent the panel from being damaged due to the concentrated load acting on the frameless panel. It is an object of the present invention to provide a cabin door device that can be used.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention has taken the following technical means. That is,
The cabin door device of the present invention has an opening frame that forms a doorway in the cabin, and a door panel having no rigid frame on the outer peripheral edge of the door frame can open and close the doorway from the outside of the cabin. A door lock which is attached to the door frame by a hinge, and which holds the door panel in a state where the outer peripheral edge of the door panel is pressed against the opening frame over the entire periphery. The door lock is provided on a free end side of the door panel. A mating member, and an engaged member provided on the opening frame so that the engaging member can be disengageably engaged, wherein the door panel is curved toward the opening frame as the door panel is separated from the hinge and the engaging member. Then, the door panel is pressed against the opening frame side and elastically deformed from a state where a part of the outer peripheral portion of the door panel comes into contact with the opening frame and the engaging member and the engaged member do not reach the engagement position. The mating member and the engaged member are engaged Together they are made with the ability Doapane
When closing the door panel, the upper edge of the door panel is
Is configured to abut against the opening frame earlier than, the hinge is characterized in that a stopper portion for regulating the amount of opening of the door panel is provided.

Further, in the cabin door device of the present invention, an opening frame forming an entrance is formed on the left and right sides of the cabin.
A door panel having no rigid frame at the outer peripheral edge is attached to the opening frame via a hinge so that the doorway can be opened and closed from outside the cabin, and the outer peripheral edge of the door panel extends over the entire circumference of the opening frame. A door lock for holding the door panel in a pressed state. The door lock is configured to engage with an engaging member provided in a vertical middle portion on the free end side of the door panel and to engage with the engaging member in a detachable manner. An engaging member provided on the opening frame, wherein the upper side of the door panel is curved toward the opening frame as the distance from the hinge and the engaging member increases, and the upper end on the free end side of the door panel contacts the opening frame. The engaging member and the engaged member can be engaged by pressing the door panel toward the opening frame side and elastically deforming the door panel from a state where the engaging member and the engaged member have not reached the engaging position . With the door panel
When closing, the upper edge of the door panel is lower than the lower edge
The door panel is also configured to contact the opening frame first, and a handrail connected to the vicinity of the hinge and the free end side is provided at a lower portion on the inner surface side of the door panel.

[0008]

According to the present invention, the door panel is pressed against the opening frame from the state where a part of the outer peripheral edge of the door panel contacts the opening frame and the engaging member and the engaged member do not reach the engaging position. When the engaging member and the engaged member are engaged by being deformed, the outer peripheral edge of the door panel is opened even in a low rigidity portion away from the hinge and the door lock due to the elastic pressure (internal stress) of the door panel itself. The frame is pressed against the frame with an appropriate pressing force, and the sealing property between the door panel and the opening frame is secured while employing a frameless door panel.

Further, by restricting the opening amount of the door panel by the stopper portion, it is possible to prevent the hinge from hitting a side panel or the like provided on the side of the door panel, thereby preventing damage to the side panel or the like. Since the stopper portion is provided on the hinge, a concentrated load does not act on the door panel itself when opening is restricted, and damage to the frameless door panel is prevented. In addition, if a handrail is provided at the lower part of the door panel, it is possible to easily open and close the door panel by operating the handrail, and furthermore, the handrail improves the rigidity of the lower part of the door panel and improves the sealability at the lower part of the door panel. Is done.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows an agricultural tractor 1 equipped with a door device according to an embodiment of the present invention. The tractor 1 includes an engine 2 and a power transmission mechanism for transmitting the power of the engine 2 to the rear wheels 3. The vehicle has a traveling vehicle body 5 directly connected to a transmission case 4 and the like, and a cabin 6 is mounted on a rear upper portion of the traveling vehicle body 5. The engine 2 is covered with a hood 7. Inside the cabin 6, there is a driver's seat 9,
Operation devices including a handle 10 and the like are incorporated.

The cabin 6 is framed by a cabin frame 8 which is formed of a square pipe material having a hollow cross section. The cabin frame 8 includes a front support 11 and a rear support 1.
2 and an intermediate support 13 (center pillar) between them on the left and right sides, between the upper ends of the left and right front supports 11 and the left and right rear supports 1
An upper frame 14 is provided to connect between the two upper ends and between the upper ends of the front and rear struts 11, 12 respectively. A roof 15 is provided on the upper frame 14. In addition, each support 11, 12, 13
Are connected to each other by a lower frame 16. In addition,
A windshield is fitted into a front frame defined by left and right front supports 11 and upper and lower frames 14 and 16, and a rear frame defined by left and right rear supports 12 and upper and lower frames 14 and 16. Has an openable / closable rear window (not shown). On each of the left and right side surfaces of the cabin 6, an opening frame 17 that forms a doorway is formed by the front support 11, the intermediate support 13, the upper frame 14, and the lower frame 16. That is, the space between the left and right front supports 11 and the left and right intermediate supports 13 is an entrance. As shown in FIG. 1, a door panel 18 made of transparent tempered glass is attached to the opening frame 17 so that the entrance can be opened and closed from the outside of the cabin. The door panel 18 is a frameless panel that does not have a rigid frame at the outer peripheral edge, and secures a view from inside the cabin and improves the appearance. The door panel 18 is hinged to the intermediate support 13 at two locations, upper and lower.
They are openably and closably connected by 1 and 22. On the inner surface of the door panel 18, a handrail 60 is provided for an operator to open and close the door panel 18.

An opening frame 1 is provided on the outer peripheral edge of the door panel 18.
A seal member 23 in contact with the outer surface of 7 is provided over the entire circumference. The sealing material 23 is formed of relatively soft rubber to ensure watertightness, and for example, a weather strip can be employed. Further, the door device of the present embodiment includes a door lock 24 that holds the door panel 18 in an unlockable manner with the sealing material 23 on the outer peripheral edge of the door panel 18 pressed against the outer surface of the opening frame 17 over the entire circumference. Have. The door lock 24 is engaged with an engaging member 25 formed of a locking device which is attached and fixed to a lower portion near the vertical center of the free end side (front end) of the door panel 18 in the vertical direction, and the engaging member 25 is removably engaged. Front support 1 of the opening frame 17
1 and a ring-shaped engaged member 26 attached and fixed to the first member 1. Note that a locking device may be attached to the opening frame 17 side, and a ring-shaped member to which the locking device is detachably engaged may be attached to the door panel 18 side. When the door panel 18 is locked by the door lock 24, the seal member 23 provided on the outer peripheral edge of the panel 18 is pressed against the front side opening frame 17, whereby the space between the panel 18 and the side front opening frame 17 is formed. It is designed to be sealed.

In the cabin 6 of this embodiment, as shown in FIG. 2, the opening frame 17 (the front support 11 and the intermediate support 12) is
When viewed from the front front, the upper and lower central portions 17a are bent into a rectangular shape projecting outward in the left-right direction (hereinafter referred to as "opening frame reference shape").
The upper and lower central portions 18a are bent so as to protrude outward. The door panel 18 is connected to the hinges 21 and
2 and the distance from the engaging member 25, the opening frame 18 is curved more toward the opening frame 18 than the opening frame reference shape (indicated by a dashed line in FIGS. 1 and 2). That is, in this embodiment,
The upper and lower center portions 18a of the door panel 18 have a large bending ratio so that the upper and lower ends of the door panel 18 contact the opening frame 17 before the portion 18a contacts the upper and lower center portions 17a of the opening frame 17. Has become.

When the door panel 18 is closed by the hinges 21 and 22 and the door lock 24, the hinge 2
FIG. 3, in which the door locks 24, 24 are provided.
Are strongly pressed against the opening frame 17 at the three points A, B, and C shown in FIG. 7, and the points D and E at the top and bottom of the front portion tend to warp outward from the cabin 6 due to the reaction force of the sealing material 23. Therefore, in the present embodiment, as described above, the door panel 18 is curved in advance toward the opening frame 17 as the distance from the hinges 21 and 22 and the engaging member 25 increases, and the upper and lower end portions of the sealing material 23 on the outer peripheral edge of the door panel 18 are formed. (part)
Abuts on the opening frame 17, and the engaging member 25 and the engaged member 2
When the door panel 18 does not reach the engagement position (see FIG. 2), the door panel 18 is pressed against the opening frame 17 to be elastically deformed, thereby engaging the engagement member 25 with the engaged member 26. When the door panel 18 is forcibly locked, the upper and lower portions of the panel 18 are particularly forcibly brought into pressure contact with the opening frame 17.

Further, in this embodiment, the vicinity of the point D (the vicinity of the upper end on the free end side) shown in FIG. 3 is farthest from the hinges 21 and 22 and the door lock 24 and has a particularly low rigidity. Are particularly greatly curved toward the opening frame 17 side. Therefore, as shown in FIG.
The point D of 8 first comes into contact with the opening frame 17 (FIG. 4A),
Next, the point E contacts the opening frame 17 (FIG. 4B), and finally, the point C of the engaging member 25 of the door lock 24 contacts the opening frame 17 (FIG. 4C). 18. With this configuration, it is possible to improve the visibility by adopting the frameless low-rigidity door panel 18 while improving the waterproofness on the upper side of the door panel 18 where it is strongly desired to secure the waterproofness.

A rear window is provided between the left and right intermediate columns 13 and the left and right rear columns 12, and the left and right rear windows are closed by side panels 30 made of transparent glass. A sealing material 31 is fitted and fixed to the outer peripheral edge of the side panel 30 over the entire periphery. The sealing member 31 is formed of a relatively soft rubber, and for example, a weather strip can be employed. The rear end of the side panel 30 is attached to the upper frame 14 and the lower frame 16 by attaching members 32 such as bolts at upper and lower portions, respectively, and the front end of the side panel 30 is attached to the door panel 18 as described later. The upper and lower hinges 21 and 22 are attached to the intermediate support 13.

Next, a hinge structure for attaching the door panel 18 to the opening frame 17 will be described. As shown in FIGS. 5 and 6, the outer surface of the intermediate support 13 in the left-right direction is formed as a flat surface. In addition, the rear edge of the door panel 18 and the front edge of the side panel 30 are in contact with each other via sealing members 23 and 31 at a narrow interval. The upper hinge 21 includes a steel support portion 33 and the support portion 33.
And a turning arm 34 made of an aluminum alloy, the base 34a of which is rotatably supported via a vertical pivot 35. At the upper and lower ends of the support portion 33, stopper portions 36 are provided to project against the arm 34 so as to regulate the opening amount of the rotating arm 34. The amount of opening of the door panel 18 attached to the rotating arm 34 is regulated by the stopper portion 36. In such regulation, the amount of opening of the rotating arm 34 is regulated without directly applying a concentrated load to the door panel 18. The door panel 18
Can be prevented from being damaged. Further, it is possible to prevent the rotation arm 34 from hitting the side panel 30 and prevent the side panel 30 from being damaged. This is an extremely useful effect when the hinges 21 and 22 are used as attachment members for the side panel 30 as in this embodiment.

The support portion 33 is provided integrally with a cylindrical portion 33a having a substantially mountain-shaped cross section through which a pivot 35 passes. The base portion 34a of the rotating arm 34 is formed in a bifurcated shape.
Are connected by a pivot 35 so as to sandwich the cylindrical portion 33a from above and below. The forked base 34a
A concealing portion 34b that covers the cylindrical portion 33a from the outside is provided between them. When the rotating arm 34 is opened, the concealing portion 34b abuts against the side surface of the cylindrical portion 33a, and regulates the opening amount of the rotating arm 34 together with the stopper portion 36. The chamfering of the upper and lower ends of the cylindrical portion 33a prevents the cylindrical portion 33a from abutting against the upper and lower ends of the concealing portion 34b. Preferably, occurrence is prevented.

A pair of upper and lower boss portions 38 are provided on the support portion 33.
The boss 38 protrudes toward the middle support 13 inside the cabin, and the distal end surface of the boss 38 contacts the outer surface of the middle support 13. The intermediate support 13 is provided with a bolt hole 39 penetrating from the indoor side outward in the left-right direction.
9, a bolt 40 is inserted from the indoor side, and this bolt 40
Is screwed and fastened to the boss portion 38, whereby the hinge 21 is attached and fixed to the outer surface of the intermediate support 13. Further, the boss portion 38 is inserted from the outside of the cabin into a through hole 41 provided on the front edge side of the side panel 30,
The boss portion 38 is fitted with a seal member 42 that is in contact with the peripheral edge of the through hole 41 of the side panel 30.
A cylindrical collar 43 that holds the side panel 30 at a predetermined interval from the intermediate support 13 is fitted outside. In this embodiment, the seal member 42 and the collar 43 are integrally formed of an elastic material such as rubber or synthetic resin to form a bush 44. The elastic material of the bush 44 is harder than the rubber of the seal members 23 and 31 of the door panel 18 and the side panel 30.

The seal member 42 includes an outer flange portion 45 that contacts the outer peripheral portion of the peripheral portion of the through hole 41 of the side panel 30;
An inner flange portion 46 abutting on an inner surface of a peripheral portion of the through hole 41 of the side panel 30;
The side panel 30 is sandwiched by the fifth and the fourth panels 46. Before attaching the support portion 33 to the intermediate support 13, the front end surface of the collar 43 is slightly protruded from the front end surface of the boss portion 38 by a certain dimension. Is interposed between the seal member 42 and the intermediate support 13 in a state of being elastically deformed toward the axial compression side.

Therefore, the front end surface of the collar 43 (the bush 4
4 and the outer side surface of the intermediate column 13 are improved, and water can be effectively prevented from entering the intermediate column 13 from the bolt holes 39. Also, the elastic energy of the collar 43 causes the inner flange portion 46
Is pressed against the inner surface of the side panel 30, and the sealing performance at such a location can be improved with a simple structure. Further, the side panel 30 is constantly urged outward by the collar 43 to the left and right, so that the vibration of the side panel 30 can be elastically prevented.

A boss 50 is projected from the inner surface of the turning tip of the turning arm 34. The boss 50 is inserted into an insertion hole 51 provided on the rear edge of the door panel 18 on the outer surface of the panel 18. Through a ring-shaped rubber bush 52. The tip surface of the boss 50 is the door panel 1.
8 is brought into contact with a flat washer 53 arranged on the inner side of
In the screw hole 0, a screw 5 that penetrates the flat washer 53 from the indoor side
4 is screwed together, whereby the door panel 18 is attached rotatably around the pivot 35 of the hinge 21.

The rubber bush 52 serves as a seal member for preventing water from entering through the insertion hole 51, and also functions as a vibration insulator for the door panel 18. In the lower hinge 22, as shown in FIG. 7, a pair of left and right bosses 38 of the rotating arm 34 is provided, and a flat washer 53 is attached across the pair of bosses 38. The other configuration is the same as that of the upper hinge 21, so that the same reference numerals are given and the detailed description is omitted. According to the hinge device described above, the left and right outer surfaces of the intermediate support 13 are formed as flat surfaces, and the hinges 21 and 22 are attached to the intermediate support 13 so as to overlap the outer surface of the side panel 30. By narrowing the space between the edge and the front edge of the side panel 30, the side surface of the cabin 6 can be designed to have a sense of unity. In addition, the collar 4 externally fitted to the boss portion 38
3, the side panel 30 is held at a predetermined distance from the intermediate support 13 so that the side panel 30 is
The first and second support portions 33 can be attached to the intermediate column 13, so that the number of parts and the cost can be reduced. Further, since the collar 43 is interposed between the seal member 42 and the intermediate support 13 in a state of being elastically deformed toward the axial compression side, the end face of the collar 43 is attached to the outer surface of the intermediate support 13 over the entire circumference of the collar 43. The pressure contact can be made, and the sealing performance of the bolt hole 39 provided in the intermediate support 13 can be ensured, and the sealing performance of the through hole 41 of the side panel 30 can be improved. Furthermore, this color 4
3, the side panel 30 can always be pressed in the direction away from the intermediate support 13, so that the left and right vibrations of the side panel 30 can be prevented. Can be further axially compressed to reduce the impact.

Next, the handrail 60 of the door panel 18 will be described. The handrail 60 has a rod-like shape made of an iron pipe or the like, and its upper end is fixed to the inner surface of the flat washer 53 of the lower hinge 22 by welding. Railing 6
A lower end portion of the door panel 18 is connected to a front end of a lower end portion, which is a free end side of the door panel 18. That is, as shown in FIG. 10, a mounting hole 62 is provided at a front end of a lower end portion of the door panel 18, a mounting plate 63 having a screw hole is fixed to a lower end of the handrail 60 by welding, and a bolt 64 is inserted into the mounting hole 62 from outside. Then, the lower end of the handrail 60 is fastened and fixed to the door panel 18 by the bolt 65 via the washer 65 and the pair of vibration isolating rubbers 66 and 67 by screwing into the screw hole of the mounting plate 63.

The handrail 60 allows the door panel 18
The rigidity on the lower side of the is improved to some extent. Therefore, the lower side of the door panel 18 (near the point E in FIG. 3) does not have to be greatly curved toward the opening frame 17 as the upper side (near the point D in FIG. 3), and the sealing between the door panel 18 and the opening frame 17 is not required. Nature is secured. In the present invention, the handrail 60 may not be provided. In that case, it is preferable that the lower side of the door panel 18 be slightly curved toward the opening frame 17. A rear wheel fender 70 is provided at the rear lower part on both left and right sides of the cabin 6, and a floor sheet 71 made of a steel plate is stretched at the bottom of the cabin 6 in the front-rear direction to form a floor. I have. The rear part of the floor seat 71 is formed one step higher than the front part, and the driver's seat 9 is provided on the rear part of the floor seat 71. The front portion of the floor sheet 71 is a portion on which the operator's feet are placed, and the front left and right sides of the portion are used as entrances and exits, and the lower frame 16 below the entrance is a step.

The center of the front part of the floor sheet 71 is shown in FIG.
As shown in FIG. 5, the projections 71a are projected upward in order to avoid interference with the transmission case 4 and the like. First sound absorbing material 72 made of foam
Are polymerized and adhered. In addition, in order to suppress transmission of vibration from the vehicle body 5, a vibration damping material made of a material such as asphalt may be provided between the floor sheet 71 and the first sound absorbing material 72. In addition, the protrusion 71 of the floor sheet 71
a, the second sound absorbing material 7 made of polyurethane foam is wrapped on the left and right inner sides of the left and right first sound absorbing materials 72.
3 is laid, the sound from the car body 5 side is cut off,
A rubber floor mat 74 shown in FIG. 11 and formed in a shape corresponding to the front portion of the floor sheet 71 is laid on the second sound absorbing material 73 and the first sound absorbing material 72.

Between the projecting portion 71a of the floor sheet 71 and the first left and right sound absorbing members 72, there is provided a space 7 for passing a wiring 75 such as a wire harness for supplying and controlling various devices.
6 are provided for effective use of space and simplification of the wiring structure. The present invention is not limited to the above embodiments, and can be appropriately designed and changed. For example,
In the above-described embodiment, the stopper portion 36 protrudes from the support portion 33 of the hinges 21 and 22. However, the stopper abuts on the rotation arm 34 of the hinges 21 and 22 to contact the support portion 33 in order to regulate the opening amount of the arm 34. A part 36 can also be provided.

The bending direction and the amount of bending of the door panel 18 are not limited to those in the above-described embodiment, but include the overall shape of the door panel 18 and the positions where the hinges 21 and 22 are provided.
The design can be changed as appropriate in accordance with the position where the door lock 24 is provided. As long as this is the case, it is possible to bend not only in the vertical direction but also in the width direction. Further, a sealing material for sealing between the door panel 18 and the opening frame 17 can be provided on the opening frame 17 side.

[0029]

As described above, in the cabin door device according to the present invention, the cabin is formed with the opening frame constituting the entrance and exit, and the opening frame does not have a rigid frame at the outer peripheral edge. A door lock attached to the door panel via a hinge so that the door can be opened and closed from the outside of the cabin; and a door lock for holding the door panel in a state where an outer peripheral edge of the door panel is pressed all the way to the opening frame. The lock has an engaging member provided on the free end side of the door panel, and an engaged member provided on the opening frame such that the engaging member is releasably engaged with the door panel. The door panel is bent toward the opening frame side as it separates from the engaging member, and the door panel is moved from a state where a part of the outer peripheral edge of the door panel contacts the opening frame and the engaging member and the engaged member do not reach the engaging position. Elastic deformation when pressed against open frame The engagement member and the engaged member can be engaged with each other, and the hinge is provided with a stopper that regulates the opening amount of the door panel. Due to the resilient pressure of the door panel itself, the outer peripheral edge of the door panel can be pressed against the opening frame with an appropriate pressing force even at a low rigidity portion away from the hinge and the door lock, and the entire outer peripheral edge of the door panel can be pressed. It can be brought into close contact with the opening frame with a uniform pressing force, and a frameless door panel can be used to improve the visibility while ensuring the sealing performance between the door panel and the opening frame. The stopper provided on the hinge can prevent the side panel from being damaged while preventing the door panel from being damaged. Further, the cabin door device of the present invention is characterized in that an opening frame forming a doorway is formed on the left and right sides of the cabin, and a door panel having no rigid frame body on the outer peripheral edge is formed in the opening frame. A door lock that is attached via a hinge so that it can be opened and closed from the outside and that holds the door panel in a state in which the outer peripheral edge of the door panel is pressed against the opening frame over the entire circumference is provided. An engaging member provided at an upper and lower halfway portion on an end side, and an engaged member provided on an opening frame so that the engaging member is removably engaged, an upper side of the door panel has a hinge. The door panel is bent toward the opening frame side as it moves away from the engaging member, and the upper end of the free end of the door panel comes into contact with the opening frame and the engaging member and the engaged member do not reach the engaging position. Press against the open frame side to elastically deform The engagement member and the engaged member can be engaged with each other, and a handrail connected to the vicinity of the hinge and the free end is provided at the lower portion on the inner surface side of the door panel. In the case, the sealing property against the opening frame can be secured mainly by the elastic pressure of the door panel itself, while on the lower side of the door panel, the rigidity of the door panel itself is improved by the handrail provided on the inner surface of the door panel, The improvement of the rigidity can ensure the sealing property with respect to the opening frame at the lower part of the door panel, and in combination with the curved shape of the door panel, the door panel is brought into close contact with the opening frame over the entire outer periphery of the door panel with a uniform pressing force. be able to.

[Brief description of the drawings]

1 is an enlarged cross-sectional view showing a cabin door device according to an embodiment of the present invention, corresponding to a cross section taken along line XX of FIG. 3;

FIG. 2 is a simplified front sectional view of the door device.

FIG. 3 is an overall side view showing the cabin.

FIG. 4 is a simplified front sectional view showing the order of contact of the door panel with the opening frame over time.

FIG. 5 is a plan sectional view showing an upper hinge.

FIG. 6 is a sectional view taken along line YY of FIG. 5;

FIG. 7 is a plan sectional view showing a lower hinge.

FIG. 8 is an overall perspective view showing the lower hinge in an exploded manner.

FIG. 9 is a plan view showing a state when a lower hinge is opened.

FIG. 10 is a cross-sectional view showing a connection structure between a lower end portion of a handrail and a door panel.

FIG. 11 is a plan view of a floor cover.

FIG. 12 is a cross-sectional view showing a structure of a front portion of a floor sheet inside a cabin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 6 Cabin 17 Opening frame 18 Door panel 21 Upper hinge 22 Lower hinge 24 Door lock 25 Engaging member 26 Engaged member 36 Stopper part 60 Handrail

Continuation of the front page (56) References JP-A-5-77643 (JP, A) JP-A 63-17 (JP, U) JP-A 5-72532 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B60J 5/00 B60J 5/04

Claims (2)

(57) [Claims] 1. An opening frame (17) forming an entrance and exit is formed in a cabin (6), and a door panel (18) having no rigid frame at an outer peripheral edge is formed on the opening frame (17). The hinges (21, 21) can be opened and closed from the outside of the cabin (6).
A door lock (24) attached to the door panel (18) via an outer peripheral edge thereof, the door lock (24) being held in a state where the outer peripheral edge of the door panel (18) is pressed against the opening frame (17) over the entire circumference; The lock (24) includes an engaging member (25) provided on the free end side of the door panel (18) and the engaging member (2).
5) has an engaged member (26) provided on the opening frame (17) so as to be removably engaged with the door panel (1).
8) is curved toward the opening frame (17) as the distance from the hinges (21, 22) and the engaging member (25) increases, and a part of the outer peripheral edge of the door panel (18) contacts the opening frame (17). The door panel (18) is pressed against the opening frame (17) side and elastically deformed from the state where the engaging member (25) and the engaged member (26) do not reach the engaging position, thereby causing the engaging member ( 25) and the engaged member (26) can be engaged with each other.
And when closing the door panel (18)
The upper edge of the door panel (18) is opened before the lower edge.
A cabin configured to abut a frame (17), wherein the hinges (21, 22) are provided with a stopper (36) for restricting an opening amount of the door panel (18). Door equipment. 2. An opening frame (17) forming an entrance and exit is formed on the left and right sides of the cabin (6).
A door panel (18) having no rigid frame on the outer peripheral edge is attached via hinges (21, 22) so that the doorway can be opened and closed from the outside of the cabin (6).
8) a door lock (24) for holding the door panel (18) in a state where the outer peripheral edge of the door panel (18) is pressed against the opening frame (17) over the entire circumference, and the door lock (24) is provided with the door panel (18). An engaging member (2
5) and an engaged member (26) provided on the opening frame (17) so that the engaging member (25) can be engaged and disengaged. The upper side of the door panel (18) is , Hinge (2
1 and 22) and the engaging member (25), the door panel (18) is curved toward the opening frame (17) side, and the upper end on the free end side of the door panel (18) contacts the opening frame (17) and the engaging member ( 2
The door panel (18) is pressed against the opening frame (17) to elastically deform the state where the engagement member (26) does not reach the engagement position with the engagement member (25), so that the engagement member (25) and the engagement member (26) can be engaged with the door panel.
When closing the door panel (18),
The upper edge of the abuts against the opening frame (17) before the lower edge
A cabin door device characterized in that a handrail (60) connected to the vicinity of the hinge (22) and the free end side is provided at the lower portion on the inner surface side of the door panel (18). .