JP4700589B2 - Cabin door equipment - Google Patents

Description

  The present invention relates to a cabin door device mounted on a vehicle such as a work vehicle.

  As a conventional technique, for example, as disclosed in Patent Document 1 and Patent Document 2, the auxiliary striker (2 in FIG. 3 in Patent Document 1 and 26 in FIG. 1 in Patent Document 2) is set to a horizontal holding posture. By changing the posture and connecting the lock device (FIG. 3 of Patent Document 1 and 10 of Patent Document 2 of FIG. 1), the door is opened a little, and the air in the cabin is exhausted, or There is known a cabin door device configured to be able to take outside air into the cabin.

Japanese Patent No. 3108182 (refer to FIG. 3, FIG. 4 and paragraph number “0010”) Japanese Patent No. 3177081 (see FIG. 1)

  In the conventional cabin door device disclosed in Patent Document 1, the auxiliary striker (2 in FIG. 3 of Patent Document 1) can be switched between a holding posture and a housing posture by rotating the auxiliary striker (2 in FIG. 3) by about 270 degrees. In the conventional cabin door device disclosed in Patent Document 2, the auxiliary striker (10 in FIG. 1 of Patent Document 2) is rotated by about 180 degrees to hold the auxiliary striker. It can be switched between a posture and a storage posture.

As described above, when the auxiliary striker is switched between the holding posture and the storage posture, if the auxiliary striker is rotated or swung in a wide angle range, it is necessary to secure a wide space for rotating or swinging the auxiliary striker. . Therefore, for example, there is a problem that the arrangement of the devices in the cabin is restricted, and when the load is placed at a position where the auxiliary striker rotates or swings, the posture of the auxiliary striker cannot be changed and operability is improved. There was a problem of being bad.
An object of the present invention is to realize a cabin door device that can be switched between a holding posture and a housing posture in a compact manner and has good operability.

[I]
(Constitution)
Lock the first feature of the present invention, the sides of the cabin frame, provided with front or rear of the vertical axis swinging openable door around set only, the striker provided on the cabin frame side door The cabin door device configured to connect the devices and hold the door in a closed state is to be configured as follows.
An auxiliary striker is provided on the side of the cabin frame at a position facing the end of the door that is opened and closed on the side opposite to the side on which the vertical axis exists, and the auxiliary striker is installed on the side of the cabin frame. An arm part supported by the part so as to be swingable around an axial center in the front-rear direction, and a lock pin provided at a tip part of the arm part,
The auxiliary striker has a sideways holding posture in which the arm portion is turned sideways with the door slightly opened and the lock pin at the tip is coupled to the lock device and held in a coupled state, and the lock pin is placed in the cabin. It is configured such that the posture can be freely changed to a housing posture in which the arm portion is stood up so as to be housed and positioned above the longitudinal axis .
The arm portion of the auxiliary striker is positioned in a cabin frame so that the position of the axial center in the front-rear direction is higher than the position of the lock pin of the auxiliary striker coupled to the lock device on the door side in the holding posture. It is supported on the side of the swayable swing.

(Function)
According to the first feature of the present invention, the auxiliary striker that can change its posture between the horizontal holding posture and the stowed storage posture is provided, and the auxiliary striker is configured to be swingable around the axial center in the front-rear direction. The posture can be changed to the horizontal holding posture by swinging the auxiliary striker downward from the accommodated posture, and the posture can be changed to the standing posture by swinging the auxiliary striker upward from the horizontal holding posture. be able to. That is, the posture can be changed between the holding posture and the housing posture by swinging the auxiliary striker up and down within a relatively narrow angle range.

  More specifically, for example, as shown in FIG. 6, the angle at which the auxiliary striker (45 in FIG. 6) is swung between the holding posture and the housing posture is the angle of Patent Document 1 or Patent Document 2 (about 270 degrees). (Or about 90 degrees in the example of FIG. 6). Therefore, the posture can be changed between the holding posture and the housing posture by swinging the auxiliary striker up and down within a relatively narrow angle range.

(The invention's effect)
According to the first feature of the present invention, the auxiliary striker can be changed between the holding posture and the standing posture by swinging up and down within a relatively narrow angle range, so that a wide space for swinging the auxiliary striker is secured. There is no need to do it. For this reason, for example, the arrangement of devices in the cabin is less restricted, and the degree of freedom in design can be improved. Further, for example, even if a luggage or the like is placed in front of the auxiliary striker, the auxiliary striker can be changed in posture, so that the operability of the auxiliary striker can be improved.

[I I]

(Function)
For example, in the conventional cabin door device disclosed in Patent Document 1, in the holding posture, the tip of the auxiliary striker (the portion indicated by the arrow in FIG. 3 of Patent Document 1) is the auxiliary striker (FIG. 3 of Patent Document 1). 2 ′) is positioned so as to be slightly above the axial center in the front-rear direction. Therefore, for example, in a state where the auxiliary striker is rotated 270 degrees from the suspended state and the posture is changed to the holding posture, the door (3 in FIG. 3 of Patent Document 1) is closed and the locking device (FIG. 3 of Patent Document 1) is closed. 5) to be engaged with the auxiliary striker, there is a problem that the auxiliary striker is flipped upward and the locking device cannot be reliably engaged with the auxiliary striker, and the operability of the auxiliary striker is poor. It was.

According to the first feature of the present invention, the arm of the auxiliary striker is positioned so that the position of the axial center in the front-rear direction is higher than the position of the lock pin of the auxiliary striker coupled to the locking device on the door side in the holding posture. Since the door is swingably supported on the side of the cabin frame , for example, when the door is forced to close and the lock device is engaged with the auxiliary striker, the auxiliary striker is swung downward. As a result, the auxiliary striker is less likely to be lifted upward, and the locking device can be more reliably engaged with the auxiliary striker.

(The invention's effect)
According to the first feature of the present invention, since the locking device can be more reliably engaged with the auxiliary striker, the operability of the auxiliary striker can be improved.

[III]
(Constitution)
The second feature of the present invention is that a lock device provided on the door side of a striker provided on the cabin frame side is provided with a door that can swing open and close around the front or rear vertical axis at the side of the cabin frame. In the cabin door device configured to hold the door in a closed state by connecting the doors, the following configuration is provided.
An auxiliary striker is provided on the side of the cabin frame at a position facing the end of the door that is opened and closed on the side opposite to the side on which the vertical axis exists, and the auxiliary striker is installed on the side of the cabin frame. An arm part supported by the part so as to be swingable around an axial center in the front-rear direction, and a lock pin provided at a tip part of the arm part,
The auxiliary striker has a sideways holding posture in which the arm portion is turned sideways with the door slightly opened and the lock pin at the tip is coupled to the lock device and held in a coupled state, and the lock pin is placed in the cabin. It is configured such that the posture can be freely changed to a housing posture in which the arm portion is stood up so as to be housed and positioned above the longitudinal axis.
Wherein the contact portion is provided on the arm portion of the auxiliary striker, the said contact portion to the lock pin of the striker deployed under side of the arm portion of the auxiliary striker be to abutment, said at the holding position The auxiliary striker is configured to be restricted from swinging downward .

(Function)
According to a second feature of the present invention, and a has a "working", "working" as follows in addition to according to the first feature as well as previous section [I] of the present invention.
According to the second feature of the present invention , a holding portion is provided on the arm portion of the auxiliary striker, and the holding portion is held in contact with the lock pin of the striker disposed below the arm portion of the auxiliary striker. By being configured to restrict the downward swing of the auxiliary striker in the posture, the lock pin of the striker can also be used as a member for restricting the downward swing of the auxiliary striker. Therefore, for example, the structure for regulating the downward swing of the auxiliary striker can be simplified as compared with the case where a member for regulating the downward swing of the auxiliary striker is provided separately.

(The invention's effect)
According to a second feature of the present invention comprises a "effect of invention" according to the same manner as the first feature of the present invention set forth in the preceding paragraph [I], the "effect of the invention" described below in addition to I have.
According to the 2nd characteristic of this invention, since the structure which controls the rocking | fluctuation to the downward direction of an auxiliary striker can be simplified, a number of parts can be reduced and manufacturing cost can be reduced.

[Overall configuration of multi-purpose work vehicle]
FIG. 1 is an overall side view of a multipurpose work vehicle, which is an example of a work vehicle, and FIG. 2 is an overall plan view of the multipurpose work vehicle. The multi-purpose work vehicle transmits power from the engine 2 supported by vibration isolation to the body frame 1 to the pair of left and right front wheels 5 and rear wheels 6 via the gear transmission 4 and the hydrostatic continuously variable transmission 3. It is configured to drive four wheels by transmitting. FIG. 3 is a plan view of the multipurpose work vehicle with the door 33 slightly opened, and FIG. 4 is a left side view with the windshield 26 and the rear glass 27 slightly opened.

  As shown in FIGS. 1 and 2, the front part of the multi-purpose work vehicle includes a lower cover 7 also serving as a front wheel fender, an upper cover 8 having an upper left and right center opening, and a swinging open / close type that covers the opening so as to be opened and closed. Bonnet 9 etc. are deployed.

  A multi-purpose work vehicle includes a cabin 14 provided with a steering wheel 11 for steering a front wheel, a driver's seat 12 and the like at a front and rear center portion, and a cabin space is formed by the cabin 14.

  A hydraulic dump cylinder 15 is provided above the gear transmission 4 at the rear of the multipurpose work vehicle. By extending and contracting the dump cylinder 15, a left and right support shaft 16 provided at the rear end of the vehicle body frame 1 is provided. The loading platform 17 is configured to dump up and down with the fulcrum as a fulcrum.

  The vehicle body frame 1 includes a cabin frame 20 that forms a boarding space, and a front frame 18 and a rear frame 19 that extend forward and backward from the cabin frame 20. The frames (18, 19, 20, etc.) are firmly connected by welding.

  The cabin frame 20 includes a pair of left and right door frames 21 that form an entrance / exit, a plurality of cross members 22 provided across the left and right door frames 21, a floor panel 23 that forms a floor of a boarding space, and a driver's seat 12. The cabin frame 20 includes a support frame 24, a roof panel (not shown) that is located on the ceiling portion of the boarding space and is provided across the left and right door frames 21, and the front side and the rear side of the cabin frame 20. The sides are covered with an openable / closable front glass 26 and an openable / closable rear glass 27, and the roof panel is covered with a resin outer roof 25.

  As shown in FIGS. 3 and 4, the windshield 26 is swingably supported by hinges 28 positioned on the left and right of the upper end portion so that the lower side of the windshield 26 is opened outside the vehicle. Gas dampers 29 are attached to the left and right ends of the lower portion of the windshield 26 across the windshield 26 and the door frame 21. When the lock handles 30 provided on the left and right sides of the lower portion of the windshield 26 are released, The windshield 26 swings back and forth around the axis of the hinge 28 due to the reaction force of the damper 29 so that the lower side of the windshield 26 is opened outside the vehicle so that outside air from the front can be taken into the driver seat 12. It is configured.

  The rear glass 27 is swingably supported by hinges 31 positioned on the left and right of the upper end portion so that the lower side of the rear glass 27 is opened to the outside of the vehicle. Folding stays 32 are attached to the left and right sides of the lower portion of the rear glass 27 so as to extend between the rear glass 27 and the cross member 22, and a locking device (not shown) provided on the stay 32 is released, and the rear glass is released. When the lower side of 27 is pushed rearward from the inside, the rear glass 27 swings back and forth around the axis of the hinge 31 so that the lower side of the rear glass 27 is opened outside the vehicle. When the lower portion of the rear glass 27 is opened while the lower portion of the front glass 26 is opened, the outside air taken into the driver's seat 12 from the front passes through the driver seat 12 and is exhausted from the lower portion of the rear glass 27.

  Doors 33 are provided on both sides of the cabin frame 20, and when the opening / closing handle 34 is operated from the inside or outside of the driver's seat 12, a pair of left and right doors 33 that are opened outwardly are hinges positioned above and below the front part of the door 33. It is configured to open and close in a single-opening manner around 35 axis centers.

  The door 33 includes a door main body 33a configured by press-molding an ABS resin plate and coating the surface with an acrylic sheet, a reinforcing frame 33b obtained by bending a square pipe-shaped steel pipe into a loop shape, and the door main body 33. And a side glass 33c attached to the door 33. A state in which the seal member 36 is fitted and attached to the outer periphery of the door main body 33a constituting the door 33, and the door 33 is closed to the door receiving portion 21a of the door frame 21. It is comprised so that the sealing performance of the door 33 can be ensured by making it closely_contact | adhere.

  An insertable / retractable hinge 35 is fixed to the door body 33a constituting the door 33 from the outside, and a boss portion 35a fixed to the door frame 21 from above in a state where the insertable / removable hinge 35 is fixed to the door body 33a. The door 30 is attached to the door frame 21 so as to be able to swing open and close.

  As shown in FIGS. 4 and 7, an opening / closing handle 34 having a lock release button 34a is fixed to the outer surface side of the door 33, and the lock release button 34a is grasped by grasping the opening / closing handle 34 from the outside of the multipurpose work vehicle. When is pressed, the lock claw 37a constituting the lock device 37 is disengaged from the lock pin 42 and the door 33 can be opened.

  A bracket 38 which is bent and formed on the inner side of the vehicle body is fixed to the reinforcing frame 33b (see FIG. 5). A lock device 37 which can be locked is fixed to the bracket 38, the door 33 is closed and the door is closed. By engaging the lock device 37 with the lock pin 42 or the lock pin 47 fixed on the frame 21 side, the door 33 can be held in a closed state or a slightly opened state. .

  The lock device 37 includes a pair of upper and lower lock claws 37a, a case 37b, a lock release tool 37c, and the like. The pair of upper and lower lock claws 37a are spring-biased by a torsion spring (not shown) built in the case 37b in an unlocked state where the lock claws 37a are opened up and down, and the door 33 is closed to lock the lock device 37. Is engaged with the lock pin 42 or the lock pin 47, and when the pushing force of the lock pin 42 or the lock pin 47 acts on the lock claw 37a, the lock claw 37a is closed against the biasing force of the torsion spring, and this lock claw The lock pin 42 or the lock pin 47 can be held with the 37a closed. The lock device 37 is covered with a resin protective cover 37d so that the inside of the lock device 37 is not exposed and erroneous operation can be prevented and the appearance is improved.

  When the unlocking tool 37c attached to the locking device 37 is operated from the inside or when the unlocking button 34a of the opening / closing handle 34 is operated from the outside, the holding of the locking claw 37a is released and the locking claw 37a is biased by the torsion spring. And the engagement of the lock pin 42 or the lock pin 47 with the lock device 37 is released, and the door 33 can be opened and closed.

[Auxiliary striker structure]
5 to 8, the detailed structure of the auxiliary striker 45 according to the present invention will be described. FIG. 5 shows a cross-sectional plan view of the vicinity of the auxiliary striker 45 in the holding posture (FIG. 5 (a)) and the storage posture (FIG. 5 (b)) . However, FIG. 5 (b) is a plan view showing a state in which the mounting portion 41 of the striker 40 is cut at an intermediate position in the vertical direction between the position of the lock pin 42 of the striker 40 and the mounting pin 48 of the auxiliary striker 45. Therefore, although the auxiliary striker 45 does not appear on the drawing, for convenience, only the position of the axial center P1 in the front-rear direction is shown in plan view.
FIG. 6 shows a front view of the vicinity of the auxiliary striker 45 in the holding posture (FIG. 6 (A)) and the storage posture (FIG. 6 (B)). Moreover, FIG. 7 shows the side view which looked at the auxiliary striker 45 from the inside, and FIG. 8 shows the vertical side view of the auxiliary striker 45 attachment part. 5 to 8, the cabin door device of the left door 33 of the multi-purpose work vehicle will be described. However, the cabin door device of the right door 33 is different in that the left and right symmetry is different. The configuration is the same as that of the cabin door device of the left door 33.

  As shown in FIGS. 5 to 8, a bracket 39 bent in a U-shape is fixed to a cross member 22 provided across the left and right door frames 21, and two strikers 40 are attached to the bracket 39. It is fixed with a book connecting bolt 44.

  The striker 40 is configured by a plate-like attachment portion 41 and a lock pin 42 fixed to the attachment portion 41. The attachment portion 41 has an attachment hole for fixing to the bracket 39 and an auxiliary striker 45 described later. The screw part 41b for attaching the is formed. A stopper 41c that restricts the inward swing range of the auxiliary striker 45 is fixed to the outer side of the upper mounting hole.

  The lock pin 42 is formed of a cylindrical bar that is long in the front-rear direction, and a hexagonal retaining portion 42 a is formed at the tip of the lock pin 42 so that the engagement with the lock device 37 is difficult to disengage. ing.

  The mounting hole provided in the mounting portion 41 of the striker 40 is processed to be larger than the outer shape of the connecting bolt 44, and is configured so that the position and mounting angle of the striker 40 in the vertical and horizontal directions can be adjusted. Thus, by machining the mounting hole provided in the mounting portion 41 of the striker 40, the position and mounting angle of the striker 40 and the auxiliary striker 45 can be finely adjusted according to the position of the locking device 37, and the door The position of the auxiliary striker 45 can be adjusted in a holding posture in which the door 33 is slightly opened while securing the sealing performance in the closed state.

  The auxiliary striker 45 includes a flat arm portion 46 and a lock pin 47 fixed to the arm portion 46. The arm portion 46 and the lock pin 47 securely hold the door 33 in a holding posture. The plate thickness of the arm 46 and the outer diameter of the lock pin 47 are set to be large so that the auxiliary striker 45 will not be deformed or damaged even if a large external force is applied to the auxiliary striker 45 due to traveling of a multi-purpose work vehicle. Has been.

  The arm portion 46 of the auxiliary striker 45 is a contact formed in a concave shape in accordance with the shape of the lock pin 47 of the striker 40 and the boss portion 46a for rotatably attaching the auxiliary striker 45 to the striker 40. A contact portion 46b is formed. The contact portion 46b is provided to restrict the lower limit position of the swing range by bringing the auxiliary striker 45 into contact with the lock pin 47 of the striker 40 in a holding posture in which the door 33 is slightly opened.

  The lock pin 47 at the tip of the auxiliary striker 45 is formed of a cylindrical bar that is long in the front-rear direction and has the same shape as the lock pin 42 of the striker 40. A hexagonal retaining portion 47a is formed so that it is difficult to disengage.

  The auxiliary striker 45 is mounted so as to be swingable up and down around the axis of the mounting pin 48 via a disc spring 49 and a collar 50 in a state where the auxiliary striker 45 is externally fitted to a mounting pin 48 whose tip is threaded. When the auxiliary striker 45 is tilted downward against the reaction force of the disc spring 49, the contact portion 46b of the arm portion 46 contacts the lock pin 42 of the striker 40, and the locking device When the auxiliary striker 45 is positioned in the holding posture to engage the plate 37 and lifted upward against the reaction force of the disc spring 49, the disc striker 49 is counteracted at the position where the auxiliary striker 45 is lifted upward. The auxiliary striker 45 is configured to be held by the force and held in the accommodated posture accommodated in the cabin 14 chamber. In this multi-purpose work vehicle, a mechanism that frictionally holds the auxiliary striker 45 and the mounting portion 41 of the striker 40 by the disc spring 49 is adopted. Not only the spring 49 but also a different configuration may be used.

  In the state in which the auxiliary striker 45 is swung upwards, the swing range of the auxiliary striker 45 inward is restricted by the stopper 41c, and the auxiliary striker 45 is mistakenly swung too much, and the decorative cover 52 and the like. It is configured not to break.

  As shown in FIG. 6A, in the holding posture in which the auxiliary striker 45 is tilted downward, the position of the axial center of the lock pin 47 engaged with the locking device 37 is more than the axial center P1 of the auxiliary striker 45 in the front-rear direction. The shape or the like of the auxiliary striker 45 is set so as to be positioned on the lower side (H in FIG. 6A). Therefore, even when the auxiliary striker 45 is tilted to the holding posture and the door 33 provided with the locking device 37 is closed from the outside and a large force is applied to the lock pin 47 in the left-right direction, the auxiliary striker 45 Therefore, the auxiliary striker 45 and the lock device 37 are engaged with each other reliably and easily, and a holding state in which the door 33 is slightly opened can be revealed.

As shown in FIG. 6 (b), in the stowed position in a state where the auxiliary striker 45 is swung upwards and brought into contact with the stopper 41 c, the gravity center position P <b> 2 of the auxiliary striker 45 is The shape or the like of the auxiliary striker 45 is configured so as to be located on the inner side of the vehicle body from the axis P1 (W in FIG. 6B). For this reason, even if a centrifugal force in the left-right direction of the vehicle body acts due to the traveling of the multipurpose work vehicle, the auxiliary striker 45 is unlikely to fall outward against the spring reaction force of the disc spring 49. Therefore, for example, compared with a case where a holding tool (not shown) for holding the auxiliary striker 45 in an upright state is separately provided, the number of parts can be reduced and the manufacturing cost can be reduced. In addition, when changing the posture of the auxiliary striker 45, it is possible to improve the operability of the auxiliary striker 45 because the labor of releasing the holder can be saved.

  In this way, by holding the auxiliary striker 45 in the accommodation posture by the reaction force of the disc spring 49 and the center of gravity position of the auxiliary striker 45, for example, a lock tool (not shown) or the like is separately provided and the auxiliary striker 45 is accommodated. Compared to the case of holding in the posture, the number of parts can be reduced, and the manufacturing cost can be reduced. In addition, when changing the posture of the auxiliary striker 45, it is possible to save the trouble of releasing the locking tool and the like, so that the operability of the auxiliary striker 45 can be improved.

  As shown in FIG. 3, the lower portions of the windshield 26 and the rear glass 27 are opened, the auxiliary striker 45 is changed to a horizontal holding posture and coupled with the lock device 37, and the door 33 is opened a little for multipurpose. When the work vehicle is driven, outside air can be taken into the driver's seat 12 from the front, and the outside air taken into the driver's seat 12 can be exhausted rearward from the gap between the door 33 and the lower gap of the rear glass. it can. Therefore, a wind flow is generated in the driver's seat 12, and a comfortable boarding space can be formed.

[First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], the door 33 is configured to open and close around the front axis of the door 33, and the lock device 37, the striker 40, the auxiliary striker 45, etc. are connected to the door. 33, the door 33 is configured to open and close around the center axis of the rear portion of the door 33, and the lock device 37, the striker 40, the auxiliary striker 45, and the like are provided at the front portion of the door 33. The same applies to the case where it is provided.

[Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] and [First Different Embodiment of the Invention], an example is shown in which the auxiliary striker 45 is held in the holding posture and the holding posture by the reaction force of the disc spring 49. However, in the holding posture, the posture is held by the weight of the auxiliary striker 45, and in the holding posture, a holding tool (not shown) is separately provided to change the posture of the auxiliary striker 45 between the holding posture and the holding posture. You may comprise. Specifically, for example, a lock pin (not shown) or a lock fitting (not shown) is provided across the auxiliary striker 45 and the mounting portion 41 of the striker 40 so that the auxiliary striker 45 can be held in the accommodated posture. It may be configured. Moreover, you may employ | adopt the structure which provides separately the holder (not shown) which hold | maintains the attitude | position of the auxiliary striker 45 in a holding | maintenance attitude | position.

[Third Another Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], [Second Alternative Embodiment of the Invention] and [Third Alternative Embodiment of the Invention], the cabin 14 of the multi-purpose work vehicle is taken as an example of the work vehicle. Although the door device has been described, the present invention can be similarly applied to a door device of the cabin 14 such as a work vehicle provided with a door 33 in the cabin, for example, an agricultural work vehicle such as a tractor or a combiner, a construction work vehicle such as a backhoe or a wheel loader.

Multipurpose work vehicle overall left side view Overall plan view of multipurpose work vehicle Top view of a multi-purpose work vehicle with the door slightly opened Left side view with the windshield and rear glass slightly opened Cross-sectional plan view showing the structure of the auxiliary striker Front view showing the structure of the auxiliary striker Side view of the auxiliary striker viewed from the inside Longitudinal side view of auxiliary striker attachment

14 cabin 21 cabin frame 33 door 37 locking device 40 striker 42 lock pin (striker)
45 Auxiliary striker
46 Arm
46b Contact part 47 Lock pin (auxiliary striker)
P1 axis

Claims (2)

The sides of the cabin frame, only set the front or rear of the vertical axis swinging openable door around, by coupling a locking device provided on the door side the striker provided on the cabin frame side, the door A cabin door device configured to be held closed,
An auxiliary striker is provided on the side of the cabin frame at a position facing the end of the door that is opened and closed on the side opposite to the side on which the vertical axis exists, and the auxiliary striker is installed on the side of the cabin frame. An arm part supported by the part so as to be swingable around an axial center in the front-rear direction, and a lock pin provided at a tip part of the arm part,
The auxiliary striker has a sideways holding posture in which the arm portion is turned sideways with the door slightly opened and the lock pin at the tip is coupled to the lock device and held in a coupled state, and the lock pin is placed in the cabin. It is configured such that the posture can be freely changed to a housing posture in which the arm portion is stood up so as to be housed and positioned above the longitudinal axis .
The arm portion of the auxiliary striker is positioned in a cabin frame so that the position of the axial center in the front-rear direction is higher than the position of the lock pin of the auxiliary striker coupled to the lock device on the door side in the holding posture. A cabin door device swingably supported on the side of the cabin. A door that can swing open and close around the vertical axis at the front or rear is provided on the side of the cabin frame, and the door is closed by connecting a striker provided on the cabin frame to a lock device provided on the door side. A cabin door device configured to be held in a state,
An auxiliary striker is provided on the side of the cabin frame at a position facing the end of the door that is opened and closed on the side opposite to the side on which the vertical axis exists, and the auxiliary striker is installed on the side of the cabin frame. An arm part supported by the part so as to be swingable around an axial center in the front-rear direction, and a lock pin provided at a tip part of the arm part,
The auxiliary striker has a sideways holding posture in which the arm portion is turned sideways with the door slightly opened and the lock pin at the tip is coupled to the lock device and held in a coupled state, and the lock pin is placed in the cabin. It is configured such that the posture can be freely changed to a housing posture in which the arm portion is stood up so as to be housed and positioned above the longitudinal axis.
Wherein the contact portion is provided on the arm portion of the auxiliary striker, the said contact portion to the lock pin of the striker deployed under side of the arm portion of the auxiliary striker be to abutment, said at the holding position door system configuration tare Ruki Yabin to restrict the swinging of the lower auxiliary striker.

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