JP6008607B2 - cabin - Google Patents

Description

  The present invention relates to a cabin provided in a tractor or a combine.

  Some tractors and combines have cabins. This type of cabin is provided with a vent in order to relieve the atmospheric pressure change in the cabin accompanying the opening and closing of the door, and prevents the door opening and closing operability from being deteriorated by a sudden change in atmospheric pressure. For example, the work vehicle of Patent Document 1 includes an air valve (air vent valve) on the floor surface below the cockpit as a vent for allowing air in the cabin to escape when the door is closed.

JP 2002-321654 A

  By the way, in the cabin of a tractor or a combine, in order to prevent dust from entering from the outside, it is required to improve the hermeticity of the cabin or to pressurize the cabin, but in a cabin with a large vent, There is a problem that it is difficult to ensure necessary sealing properties and pressurization. In addition, when the opening area of a vent hole is made small, sufficient air venting action cannot be obtained, and the opening / closing performance of the door is lowered.

The present invention has been created in order to solve these problems in view of the above-described circumstances. The invention of claim 1 includes a door that opens and closes a passenger door, and a cabin interior that opens and closes the door. a cabin comprising a vent to relieve the pressure change, and the door, door lock which can be a door unlocked state to allow the opening and closing of the door, door lock state and the switching operation for regulating the opening and closing of the door An operating tool is provided , and the door lock operating tool is integrally provided with a vent closing portion for allowing the vent to be opened when the door is unlocked and closing the vent when the door is locked. a cabin, characterized in that provided on.
The invention according to claim 2 is that the door lock operating tool is rotatably supported with respect to the door via the support shaft, so that the vent closing portion allows the vent to be opened. 2. The cabin according to claim 1, wherein the cabin is configured to be pivoted to a door lock state in which the vent hole is closed so as not to be opened .

According to the first aspect of the present invention, when the door is unlocked, the opening of the vent is allowed. Therefore, when opening and closing the door, the pressure change in the cabin is sufficiently mitigated, and the door is opened and closed easily. Can be secured. Further, when the door is locked, the vent hole is closed so as not to be opened, so that necessary sealing and pressurization can be secured in the cabin, and dust can be prevented from entering from the outside.
Further, according to the invention of claim 2, the door lock device has a rotating structure, and the structure can be simplified.

It is a perspective view of a cabin. It is a perspective view which shows the door lock cancellation | release state of a subdoor lock apparatus. It is a perspective view which shows the door lock state of a subdoor lock apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a cabin provided on a tractor. The cabin 1 includes a column 2 standing at a corner of the cabin 1, a wall panel 3 forming a wall portion of the cabin 1, and a roof of the cabin 1. A roof 4 that forms a part, a windshield 5 that closes the front opening of the cabin 1, a side glass 6 that closes the side opening of the cabin 1, an entrance 7 for an operator to get on and off, and a door 8 that opens and closes the entrance 7. ing.

  As shown in FIGS. 1 to 3, the door 8 has a door lock release state that allows the door 8 to be opened and closed and a door lock state that restricts the door 8 from being opened and closed according to the operation of the door lock operation tool. A switchable door lock device is provided. In the present embodiment, as such a door lock device, a main door lock device 9 provided in the vicinity of the middle portion in the vertical direction of the door 8 and a sub door lock device 10 provided in the vicinity of the upper end portion of the door 8 are provided. As described above, when the sub door lock device 10 is provided in the vicinity of the upper end portion of the door 8 as well as the main door lock device 9, the airtightness in the cabin 1 can be improved without increasing the rigidity of the door 8 body. it can. The sub door lock device 10 may be provided near the lower end portion of the door 8, or may be provided near the upper end portion and the lower end portion of the door 8.

  The main door lock device 9 of the present embodiment has door lock operation tools 11 on the outdoor side and the indoor side of the door 8, and the door lock release operation from the outdoor side and the door lock operation from the indoor side when riding. In addition, it is possible to perform a door lock release operation from the indoor side and a door lock operation from the outdoor side when getting off the vehicle.

  On the other hand, the sub door lock device 10 of the present embodiment has a door lock operation tool 12 only on the indoor side of the door 8, and the door lock operation from the indoor side when getting on and the indoor side when getting off the vehicle. Door unlocking operation is possible. More specifically, the door lock operation tool 12 of the sub door lock device 10 includes a support shaft portion 12a that is rotatably supported with respect to the door 8, a handle portion 12b that is gripped, and a door frame side. The latch portion 12c is engaged with and disengaged from the latch receiver 13. When the handle portion 12b is grasped and turned 90 ° counterclockwise in the unlocked state shown in FIG. 2, the latch portion 12c is operated. Is engaged with the latch receiver 13 and the opening and closing of the door 8 is restricted. On the other hand, when the handle portion 12b is grasped and rotated 90 ° in the clockwise direction in the door lock state shown in FIG. The door 8 is allowed to open and close.

  In the vicinity of the upper end portion of the door 8, a vent hole 14 is provided for reducing a change in atmospheric pressure in the cabin 1 due to opening and closing of the door 8. Thereby, it is prevented that the opening / closing operability of the door 8 is deteriorated due to a sudden change in atmospheric pressure. As shown in FIG. 1, a vent cover 15 that functions as a filter, an air valve, or the like can be provided on the outdoor side of the vent 14, but the presence or absence of the vent cover 15 is optional.

  By the way, in the cabin of a tractor, in order to prevent the intrusion of dust from the outside, it is required to enhance the hermeticity in the cabin 1 or to pressurize the cabin 1, but in the cabin 1 having a large vent hole It is difficult to ensure the necessary sealing and pressurization. Further, when the opening area of the vent hole is reduced, there is a problem that a sufficient air bleeding function cannot be obtained and the opening / closing performance of the door 8 is deteriorated.

  Therefore, in the cabin 1 according to the embodiment of the present invention, the door lock operating tool 12 of the sub door lock device 10 is allowed to open the vent 14 when the door is unlocked, and is ventilated when the door is locked. There is provided a vent closing portion 12d for closing the mouth 14 so as not to be opened. In this way, opening of the vent hole 14 is allowed when the door is unlocked. Therefore, when the door 8 is opened and closed, the change in atmospheric pressure in the cabin 1 is sufficiently mitigated, and the door 8 can be opened and closed easily. In addition, when the door is locked, the air vent 14 is closed so that it cannot be opened, so that the necessary airtightness and pressurization are secured in the cabin 1 to prevent dust from entering from the outside. Can do.

  Note that the vent hole closing portion 12d of the present embodiment includes an arm portion 12e extending from the support shaft portion 12a and a lid portion 12f provided at the distal end portion of the arm portion 12e, and the lid portion 12f is ventilated. The vent hole 14 is configured to be airtightly closed by overlapping the opening on the indoor side of the mouth 14 in a sliding manner. The form of the vent hole closing part 12d depends on the operation method and shape of the door lock device. It can be changed as appropriate.

  According to the present embodiment configured as described above, the cabin 1 includes the door 8 that opens and closes the entrance 7 and the vent 14 that reduces the change in atmospheric pressure in the cabin 1 when the door 8 is opened and closed. And a sub-door lock device 10 that can be switched between a door-lock release state that allows the door 8 to be opened and closed and a door-lock state that restricts the door 8 from being opened and closed according to the operation of the door-lock operating tool 12. The locking device 10 is provided with a vent closing portion 12d that allows the vent 14 to be opened when the door is unlocked and that cannot be opened when the door is locked. At this time, it is possible to sufficiently relieve the atmospheric pressure change in the cabin 1 and to ensure good opening / closing operability of the door 8. Further, when the door is locked, the vent hole 14 is blocked so as not to be opened, so that necessary airtightness and pressurization can be ensured in the cabin 1 and dust can be prevented from entering from the outside.

  Moreover, since the main door lock device 9 provided in the vicinity of the middle part in the vertical direction of the door 8 and the sub door lock device 10 provided in the vicinity of the upper end portion and the lower end portion of the door 8 are provided, the rigidity of the door 8 main body is increased. The airtightness in the cabin 1 can be improved without increasing it. In addition, since the vent closing portion 12d is provided in the sub door lock device 10 that can simplify the structure as compared with the main door lock device 9, it is possible to implement the present invention while avoiding the complexity of the structure. Become.

DESCRIPTION OF SYMBOLS 1 Cabin 7 Entrance / exit 8 Door 9 Main door lock apparatus 10 Sub door lock apparatus 12 Door lock operation tool 12b Handle part 12c Latch part 12d Vent closing part 14 Vent

Claims (2)

A door that opens and closes the entrance,
A cabin comprising a vent for relaxing pressure change in the cabin accompanying opening and closing of the door,
The door is provided with a door lock operation tool that can be switched between a door lock release state that allows opening and closing of the door and a door lock state that restricts opening and closing of the door,
The door lock operation tool is integrally provided with a vent closing portion for allowing the vent to be opened when the door is unlocked and closing the vent so as not to be open when the door is locked. And cabin. The door lock operating tool is rotatably supported with respect to the door via a support shaft, so that the vent closing portion allows the vent to be opened, and the vent cannot be opened. The cabin according to claim 1, wherein the cabin is configured to be rotated to a door lock state in which the door is closed.

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