JP4284231B2 - Work vehicle cabin - Google Patents

Description

  The present invention relates to a cabin structure of a work vehicle. More specifically, the present invention relates to a technique for reducing unpleasant sound generated in the cabin and improving the comfortability in the cabin.

Conventionally, a tractor in which a periphery of a seat on which an operator is seated is covered with a cabin is known. A cabin of a work vehicle is usually formed with a skeleton by a frame including a front pillar, a rear pillar, and the like, and a roof is provided on the upper surface. In addition, transparent windshields (front glass, rear glass, etc.) or doors made of glass or resin are provided at the front and rear and left and right side openings of the cabin to block noise and outside air from entering the cabin from the hood. .
For example, as described in Patent Document 1.

JP 2003-175860 A

  "Opening and closing members" such as left and right doors and rear glass provided in the opening of the cabin of a conventional work vehicle, or a ventilation hatch provided on the roof are attached to the frame by a hinge and the other end side Is provided with a locking member (for example, a door knob), and can be locked to the frame or the like with the opening and closing member closed. However, the opening / closing member having such a configuration may generate a “boom sound” in the cabin. The booming noise is caused by vibration generated when the work vehicle travels on a rough road, or vibration generated by the engine or work implement propagates to the opening / closing member through the cabin frame, and the opening / closing member vibrates to When the volume changes, the air pressure in the cabin changes, and the change in the air pressure is detected as sound pressure by the operator's ear. Such a booming sound is uncomfortable for the operator in the cabin and is cited as one of the causes of worker fatigue. In view of the above situation, the present invention provides a cabin of a work vehicle in which a booming noise is reduced to improve worker comfort and comfort.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

In Claim 1, a cabin (12) is comprised by the door (50) provided in the opening part provided in the opening part provided in the side frame unit (20) and a part of this side frame unit (20). One end of the door (50) is attached to the side frame unit (20) by hinges (62, 62), and the other end of the door (50) is attached to the side frame unit (20) by a locking member (63). The door (50) is provided with a restrained member (65a ...) made of one or a plurality of magnetic bodies at the peripheral edge of the door (50). 50), a restraining actuator constituted by an electromagnet (175a...) Is attached to a position facing the restrained member (65a...) When the electromagnet (17a. a) is supplied by a generator (67) interlocked with a drive source of the work vehicle, and the locking member (63) locks the door (50) to the side frame unit (20). The switch mechanism (69) which detects this is provided, and this switch mechanism (69) and the electromagnet (175a ...) are interlocked .

According to Claim 2, in the cabin of the work vehicle according to Claim 1, when the shape of the door (50) is substantially polygonal, the restrained member (65a ...) is connected to a corner of the door (50). It is provided in the part .

According to Claim 3, in the cabin of the work vehicle according to Claim 1, when the shape of the door (50) is substantially polygonal, the restrained member (65a ...) is connected to the side of the door (50). Is provided at the approximate center .

According to a fourth aspect of the present invention, in the cabin of the work vehicle according to the first aspect, an elastic member (66) is interposed between the restrained member (65a ...) and the door (50) .

  As effects of the present invention, the following effects can be obtained.

In Claim 1, a cabin (12) is comprised by the door (50) provided in the opening part provided in the opening part provided in the side frame unit (20) and a part of this side frame unit (20). One end of the door (50) is attached to the side frame unit (20) by hinges (62, 62), and the other end of the door (50) is attached to the side frame unit (20) by a locking member (63). The door (50) is provided with a restrained member (65a ...) made of one or a plurality of magnetic bodies at the peripheral edge of the door (50). 50), a restraining actuator constituted by an electromagnet (175a...) Is attached to a position facing the restrained member (65a...) When the electromagnet (17a. a) is supplied by a generator (67) interlocked with a drive source of the work vehicle, and the locking member (63) locks the door (50) to the side frame unit (20). Since the switch mechanism (69) for detecting this is provided and the switch mechanism (69) and the electromagnet (175a...) Are interlocked with each other, it is possible to reduce the generation of a booming noise in the cabin and It is possible to improve the comfort and comfort.

  In addition, the operator can open and close the opening / closing member with a small force.

  Further, even if the operator does not perform any special operation, if the opening and closing member is closed while the engine is operating, the electromagnet restrains the restrained member, so that the workability is excellent.

According to Claim 2, in the cabin of the work vehicle according to Claim 1, when the shape of the door (50) is substantially polygonal, the restrained member (65a ...) is connected to a corner of the door (50). since there is provided the parts, it can be constraining actuator to reduce the occurrence of a minimum number of positions to be fixed to the cover member of the cabin closing member by constraining the restrained member, effectively muffled sound is there.

According to Claim 3, in the cabin of the work vehicle according to Claim 1, when the shape of the door (50) is substantially polygonal, the restrained member (65a ...) is connected to the side of the door (50). since substantially provided at the center portion of it restraining actuator to reduce the occurrence of a minimum number of positions to be fixed to the cover member of the cabin closing member by constraining the restrained member, effectively muffled sound Is possible.

According to a fourth aspect of the present invention, in the cabin of the work vehicle according to the first aspect , the vibration of the opening / closing member having an elastic member (66) interposed between the restrained member (65a ...) and the door (50). It is possible to reduce and prevent the generation of a booming noise.

  Below, the whole structure of the tractor 201 which is one Embodiment of the working vehicle which concerns on this invention is demonstrated using FIG.

  The work vehicle according to the present invention is not limited to the tractor 201 of the present embodiment, but is a work vehicle on which an operator rides and operates such as an agricultural vehicle such as a combine or a transport vehicle, or a construction machine such as a backhoe or a loader. Widely applicable to.

  In the following description, the direction of arrow A in FIG. 1 is the front side of the tractor 201, and the front side of the paper in FIG. 1 is the left side surface of the tractor 201.

  Front wheels 1 and 1 and rear wheels 2 and 2 are supported before and after the tractor 201, and an engine 5 is disposed inside the hood 6 at the front. A cabin 12 is provided behind the bonnet 6. A steering handle 10 is disposed inside the cabin 12, and a seat 11 is disposed behind the steering handle 10. Further, a group of operation levers such as a main transmission lever, a sub transmission lever, and a PTO operation lever are disposed on the side portion of the seat 11. Here, what the operator operates to steer the work vehicle (the tractor 201 in this embodiment) (in this embodiment, the steering handle 10, the operating lever group, etc.) is collectively referred to as a “steering portion”. . A clutch housing 7 is disposed at the rear of the engine 5, and a transmission case 9 is disposed at the rear of the clutch housing 7. The driving force from the engine 5 is transmitted to the front wheels 1 and 1 and the rear wheels 2 and 2 for driving. .

Below, the detailed structure of the cabin 12 which is one form of the structure of the cabin of the work vehicle which concerns on this invention using FIG. 1 and FIG. 2 is demonstrated. As shown in FIGS. 1 and 2, the cabin 12 covers the periphery of the seat 11 of the tractor 201 (more precisely, the control section of the work vehicle) and protects the worker from wind and rain, direct sunlight, etc. A pair of left and right side frame units 20 and 20, a lower frame unit 21, a front upper frame 23, a rear upper frame 24, a front center frame 81 and the like, a front windshield 13, and a pair of left and right doors 50 and 50, The rear windshield 51 and the roof 41 provided on the upper surface of the cabin 12 are configured.

  As shown in FIG. 2, the pair of left and right side frame units 20, 20 is a structure that forms the side surface of the cabin 12. In addition, since the side frame units 20 and 20 of this structural example are comprised substantially symmetrically, only the side frame unit 20 of the left side surface side of the cabin 12 is demonstrated in the following description. The side frame unit 20 mainly includes a front pillar 40, a rear pillar 14, a side upper frame 44, a side step frame 42, a fender 33, and the like.

  The front pillar 40 is a member that forms the front portion of the side frame unit 20 and supports the right front end or the left front end of the roof 41 of the cabin 12. The front pillar 40 is a pipe-like member, and is bent in a substantially “<” shape in the middle part in a side view.

  The rear pillar 14 is a member constituting the rear part of the side frame unit 20 and supports the right rear end or the left rear end of the roof 41 of the cabin 12.

  The side upper frame 44 is a member that forms an upper portion of the side frame unit 20, and a front end thereof is fixed to an upper end portion of the front pillar 40, and a rear end thereof is fixed to an upper end portion of the rear pillar 14.

  The side step frame 42 is a member forming the lower front half of the side frame unit 20, and the front end thereof is fixed to the lower end portion of the front pillar 40, and the rear end thereof is fixed to the front end portion of the fender 33. The side step frame 42 also functions as a step for an operator to take a foot when getting on and off.

  The fender 33 is a member constituting the lower second half of the side frame unit 20, and one end thereof is fixed to the rear end portion of the side step frame 42, and the rear end thereof is fixed to the lower end portion of the rear pillar 14. The fender 33 is opposed to the rear wheels 2 and 2 and prevents dirt, mud, and the like splashed by the rear wheels 2 and 2 from entering the cabin 12.

  The lower frame unit 21 is a structure constituting the lower surface of the cabin 12. The lower frame unit 21 mainly includes a pair of left and right down frames 26 and 26, a rear center frame 30, a dust cover 29, a seat fixing member 38, an air cut plate 39, a front mount stay 27, a rear mount stay 28, and the like.

  The down frames 26 and 26 are members that are bent into a substantially “<” shape when viewed from the side, and form a portion from the lower part to the rear part of the lower frame unit 21. The front end portions of the down frames 26 and 26 are respectively fixed to the left and right lower end portions of the air cut plate 39, and the rear end portions are respectively fixed to the left and right end portions of the rear center frame 30.

  The rear center frame 30 is a member that forms the rear portion of the lower frame unit 21, and is fixed to the rear end portions of the down frames 26 and 26.

  The dust cover 29 is a member that forms the rear surface of the lower frame unit 21. The dust cover 29 is fixed to the rear portions of the down frames 26 and 26 and the rear center frame 30 to improve the rigidity of the lower frame unit 21. The soil is blocked and dirt or mud is prevented from entering the cabin 12.

  The seat fixing member 38 is a member disposed above the down frames 26 and 26 and in front of the rear center frame 30, and the seat 11 and the operation lever group are disposed on the upper surface thereof.

  The air cut plate 39 is a member that forms the front surface of the lower frame unit 21, and the lower end portion thereof is fixed to the front end portions of the down frames 26 and 26. The air cut plate 39 has a function of preventing noise and outside air from entering the cabin 12 from the bonnet 6 and a function of a mounting member provided with the steering handle 10, other instruments, an operation pedal, and the like.

  The front mount stays 27 and 27 are members fixed to the front end portions of the down frames 26 and 26, respectively, and the front portion of the lower frame unit 21 and the front portion of the side frame unit 20 (side step frames 42 and 42). And the function of fixing the cabin 12 to the main body of the tractor 201 via the vibration isolating member.

  The rear mount stays 28 and 28 are members fixed to the bent portions of the down frames 26 and 26, respectively, and fix the rear portion of the lower frame unit 21 and the rear portions of the side frame units 20 and 20 (fenders 33 and 33). And the function of fixing the cabin 12 to the tractor 201 body via the vibration isolating member.

  As shown in FIG. 1, the front windshield 13 is formed in the opening on the front surface of the cabin 12 surrounded by the front upper frame 23, the front pillars 40 and 40, and the front center frame 80 among the members constituting the frame of the cabin 12. Fixed. The front windshield 13 is made of a transparent material such as glass or resin.

  The rear windshield 51 is fixed to an opening on the rear surface of the cabin 12 surrounded by the rear upper frame 24, the rear pillars 14 and 14, and the rear center frame 30 among members constituting the frame of the cabin 12. The rear windshield 51 is made of a transparent material such as glass or resin.

In the following description, among the members constituting the cabin, a member that covers the control unit is referred to as a “cover member”, and a member that can be opened and closed in an opening provided in a part of the cover member is referred to as an “open / close member”. And In the case of this configuration example, the members constituting the structure of the cabin 12 such as the frame group and the roof 41 or members fixed thereto correspond to the covering members, and the doors 50 and 50 correspond to the opening / closing members. Further, the front windshield 13 and the rear windshield 51 correspond to an opening / closing member when configured to be opened and closed, and correspond to a covering member when configured to be fixed to the frame.

Hereinafter, the detailed configuration of the pair of left and right doors 50 and 50, which is a first configuration example of the opening and closing member according to the present invention, will be described with reference to FIGS. The doors 50 and 50 are formed in the left and right side openings of the cabin 12 surrounded by the front pillar 40, the rear pillar 14, the side upper frame 44, the side step frame 42, and the fender 33 among members constituting the frame of the cabin 12. Each is provided. In addition, since the doors 50 and 50 of the present embodiment are configured substantially symmetrically, only the door 50 provided on the left side surface of the cabin 12 will be described in the following description.

  The door 50 mainly includes a body portion 61, hinges 62 and 62, a locking member 63, a weather strip 64, and the like.

  The body 61 is made of a material such as transparent glass or resin so that an operator in the cabin 12 can secure a side view.

The hinges 62 and 62 are attached to the frame of the cabin 12 (in this configuration example, the rear pillar 14) so that the rear end of the door 50 is rotatable. In this configuration example, the rear end of the door 50 is attached to the frame of the cabin 12 by the hinges 62 and 62, but the front end of the door may be attached by the hinge or the upper end of the door may be attached.

The locking member 63 is provided at the front end of the door 50, that is, at the end opposite to the end (rear end) of the door 50 where the hinges 62 and 62 are attached. The front end of the door 50 can be locked to the frame of the cabin 12 (in the case of this configuration example, the front pillar 40). The locking member 63 includes a door knob 63a, a locking claw receiving portion 63b, a locking claw 63c, a button 63d, and the like.

  The door knob 63a is a handle for an operator to hold and open the door 50, and is provided on the outer surface of the door 50 (the surface facing the outside of the cabin 12).

  The locking claw accommodating portion 63b is provided on the inner surface of the door 50 (the surface facing the inner space of the cabin 12). The locking claw accommodating portion 63b is configured to be able to accommodate the locking claw 63c. The locking claw 63c protrudes from the locking claw accommodating portion 63b and is a mechanism (not shown) for accommodating the locking claw accommodating portion 63b. Is provided.

The locking claw 63c is configured to be able to protrude from the locking claw accommodating portion 63b. When the door 50 is closed, the engagement claw 63c is provided on the side of the cabin 12 (in the case of this configuration , the front pillar 40). It is a member for engaging the front end of the door 50 with the frame of the cabin 12 (in the case of this configuration example , the front pillar 40).

The button 63d accommodates (withdraws) the latching claw 63c in the latching claw accommodating portion 63b, that is, when the door 50 is opened, the frame of the latching claw 63c and the cabin 12 (in the case of this configuration , the front pillar 40). It is a button for releasing engagement with an engagement member (not shown) provided on the side. The button 63d is provided at a position where the operator can operate with the hand holding the door knob 63a, and is provided inside and outside the door 50.

  The weather strip 64 is made of an elastic material such as rubber or resin, and covers the peripheral edge of the door 50. The weather strip 64 abuts against the peripheral edge of the opening of the cabin 12 when the door 50 is closed to prevent intrusion of wind and rain, and the door 50 collides with the frame in small increments due to vibrations propagated to the cabin 12, which is uncomfortable. This reduces the generation of vibration noise.

A total of six restrained members 65a, 65b, 65c, 65d, 65e, and 65f are provided on the inner surface of the door 50 of this configuration example. The restrained members 65 a, 65 b, 65 c, 65 d, 65 e, and 65 f are made of a material that can be adsorbed by a magnet and a magnetic force (for example, a magnetic body made of a metal piece such as iron or a permanent magnet). Provided in the section.

On the other hand, in the frame of the cabin 12, permanent magnets 75 a, 75 b, 75 c, and 75 d are provided as restraining actuators at positions facing the restrained members 65 a, 65 b, 65 c, 65 d, 65 e, and 65 f with the door 50 closed. -75e and 75f are provided. The permanent magnets 75a, 75b, 75c, 75d, 75e, and 75f are one form of the configuration of the magnet, and are composed of permanent magnets such as ferrite magnets. The permanent magnets 75a, 75b, 75c, 75d, 75e, and 75f are attracted to the restrained members 65a, 65b, 65c, 65d, 65e, and 65f when the door 50 is closed (that is, the restrained members 65a, 65b, 65c, and 65f). 65d, 65e, and 65f are restrained by permanent magnets 75a, 75b, 75c, 75d, 75e, and 75f).

  The opening / closing member is not limited to the doors 50 and 50 as in this embodiment, and is provided at the opening of the frame so as to be openable / closable. A windshield (rear glass) 51 or a ventilation hatch (not shown) provided on the roof 41 is also included in the opening / closing member.

  As described above, the cabin 12 which is an embodiment of the cabin of the work vehicle according to the present invention has one end (rear end) of the door 50/50 attached to the rear pillar 14 by the hinges 62/62, and the other doors 50/50. The end (front end) can be locked to the front pillar 40 by the locking members 63 and 63, and one or a plurality of (six in the case of the present embodiment) restrained members 65a, 65b, 65c, 65d, 65e, and 65f are provided, and permanent magnets 75a, 75b, and 75c are provided at positions facing the restrained members 65a, 65b, 65c, 65d, 65e, and 65f when the doors 50 are closed in the frame. · 75d · 75e · 75f is provided, and when each door 50 is closed, the restrained members 65a · 65b · 65c · 65d · 65e · 65f are replaced with permanent magnets 75a · 75b · Is intended to be bound by 5c · 75d · 75e · 75f.

  Such a configuration has the following advantages. That is, in the conventional cabin, when the door is closed, only the portion where the hinge is attached and the portion where the locking member is locked are fixed to the covering member. Therefore, when the vibration generated by the work vehicle traveling on a rough road or the vibration generated by the engine or work equipment propagates through the cabin frame to the door, the portion of the door not fixed to the covering member vibrates. The volume in the cabin changes. Then, a portion of the door that is not fixed to the covering member vibrates, whereby the air pressure in the cabin changes and a “booming noise” is generated.

On the other hand, the cabin 12 according to the present invention has a permanent magnet in addition to a portion where the hinges 62 and 62 are attached and a portion where the locking member 63 is locked when the door 50 is closed. The portions where 75a, 75b, 75c, 75d, 75e, and 75f restrain the restrained members 65a, 65b, 65c, 65d, 65e, and 65f are also fixed to the covering member of the cabin 12.
Therefore, even if the vibration generated by the work vehicle traveling on a rough road or the vibration generated by the engine or the work machine propagates to the door through the cover member of the cabin, the portion that is not fixed to the cover member in the door 50 (Ie, the length sandwiched between the portions fixed to the covering member at the peripheral portion of the door 50) is short, and the change in the volume in the cabin 12 due to the vibration of the door 50 is small (in other words, vibrations). The amplitude of the opening / closing member is small). Accordingly, it is possible to reduce the occurrence of “buzzing noise” and improve the comfort and comfort of the operator in the cabin 12.

  Further, since the number of places where the door 50 is fixed to the covering member of the cabin 12 is increased, the adhesion between the door 50 and the frame of the cabin 12 is increased as compared with the conventional case, and external noise is prevented from entering the cabin 12. Is possible.

Note that the number of restrained members provided on the opening / closing member is not limited to six as in the present configuration example, and is desirably selected as appropriate according to the shape, material, thickness, and the like of the opening / closing member.

Further, as shown in this configuration example, when the shape of the door 50 is substantially polygonal, the restrained member is a corner portion of the door 50 (corresponding to the restrained members 65a, 65b, 65c, 65d), or It is preferable to provide at the substantially center part (equivalent to the restrained members 65e and 65f) of the side of the door 50. With this configuration, the number of positions where the opening / closing member is fixed to the cabin covering member is minimized, and the amount of change in the volume in the cabin 12 is effectively reduced (in other words, the opening / closing member during vibration). It is possible to reduce the generation of a booming noise by reducing the amplitude of the noise.

The peripheral portion of the opening / closing member provided with the restrained member is not limited to “the inner surface side of the opening / closing member and in the vicinity of the end surface of the opening / closing member” as in this configuration example, but the “end surface of the opening / closing member (upper end surface, side end surface, Lower end surface, etc.) "and" the outer surface side of the opening / closing member and the vicinity of the end surface of the opening / closing member ".

Below, the detailed structure of the door 150 which is a structural example of the opening-and-closing member which concerns on this invention is demonstrated using FIG. Of the members constituting the door 150, members having substantially the same configuration as the door 50 are denoted by the same member numbers, and the description thereof will be omitted. Only differences from the door 50 will be described.

  The door 150 is different from the door 50 in that rubber or resin is interposed between the restrained members 65a, 65b, 65c, 65d, 65e, and 65f (only the restrained members 65a and 65b are shown in FIG. 5) and the body portion 61. The elastic members 66, 66... Made of an elastic material such as are interposed. By configuring in this way, it is possible to further reduce the vibration of the door 150 and prevent the generation of a booming noise.

Below, the detailed structure of the door 250 which is the Example of the opening-and-closing member based on this invention is demonstrated using FIG. Note that among members constituting the door 250, members having substantially the same configuration as the door 50 are denoted by the same member numbers and description thereof is omitted, and only differences from the door 50 will be described.

  The door 250 is different from the door 50 in that a restraining actuator that restrains the restrained members 65a, 65b, 65c, 65d, 65e, and 65f (only the restrained members 65a and 65b are shown in FIG. 6) is replaced with an electromagnet 175a. 175b, 175c, 175d, 175e, and 175f (only the electromagnets 175a and 175b are shown in FIG. 6). The electromagnets 175a, 175b, 175c, 175d, 175e, and 175f are connected to the wiring 68, the switch mechanism 69, and the wiring from the generator 67. In this configuration, power is supplied through 70a, 70b, 70c, 70d, 70e, and 70f (only wirings 70a and 70b are shown in FIG. 6). Here, the generator 67 generates electric power in conjunction with the engine 5 of the tractor 201 (generates electric power only when the engine 5 is driven to rotate). As a power supply source for the electromagnet, a storage battery (battery) provided in the tractor 201 can be used instead of the generator 67.

  This configuration has the following advantages. That is, when the restraining actuator that restrains the restrained members 65a, 65b, 65c, 65d, 65e, and 65f is a permanent magnet, the restrained members 65a, 65b, 65c, 65d, 65e, and 65f and the permanent magnets When the distance is close (that is, the door is closed), a magnetic force always acts between the two. Therefore, there is a problem that the opening and closing of the door is somewhat heavy (the force required for the operator to open and close the door increases). On the other hand, when the restraining actuator for restraining the restrained members 65a, 65b, 65c, 65d, 65e, and 65f as the door 250 is the electromagnets 175a, 175b, 175c, 175d, 175e, and 175f, the door When opening and closing 250, the energization is stopped and the restraint is released without applying a magnetic force between the electromagnets 175a, 175b, 175c, 175d, 175e, and 175f and the restrained members 65a, 65b, 65c, 65d, 65e, and 65f. When the door 250 is fixed to the frame of the cabin 12, power is supplied between the electromagnets 175a, 175b, 175c, 175d, 175e, and 175f and the restrained members 65a, 65b, 65c, 65d, 65e, and 65f. It is possible to restrain by applying a magnetic force. Therefore, the door 250 can be easily opened and closed (in other words, the operator can open and close the door 250 with a small force).

  Further, when the restraining actuator is a permanent magnet, the magnitude of the magnetic force that can be applied between the permanent magnet and the restrained member is restricted to a range in which the operator can open and close the door. On the other hand, when the restraining actuator for restraining the restrained members 65a, 65b, 65c, 65d, 65e, and 65f as the door 250 is the electromagnets 175a, 175b, 175c, 175d, 175e, and 175f, There is no particular problem even if the magnitude of the magnetic force that can be applied between the restraining actuator and the restrained member is within a range where the operator cannot open and close the door (that is, restraining with a strong force). Therefore, it is possible to further strengthen the adsorption force due to the magnetic force between the magnet and the restrained member and suppress the vibration of the door.

  Further, the switch mechanism 69 in the present embodiment is provided at a portion where the locking claw 63c of the locking member 63 is engaged with the frame (front pillar 40). In the switch mechanism 69, the power supplied to the switch mechanism 69 from the generator 67 via the wiring 68 is engaged with the covering claw 63c (the locking member 63 locks the door 250 on the frame side). ) Is only supplied to the electromagnets 175a, 175b, 175c, 175d, 175e, and 175f via the wirings 70a, 70b, 70c, 70d, 70e, and 70f (only the wirings 70a and 70b are shown in FIG. 6). It is said. That is, when the button 63d is pressed, the switch (detection means) is turned off, and the electromagnets 175a, 175b, 175c, 175d, 175e, and 175f are stopped in conjunction with the switch, and the electromagnets 175a, 175b, 175c, and 175d are stopped.・ The 175e and 175f are not operated. With this configuration, the electromagnets 175a, 175b, 175c, 175d, 175e, and 175f are restrained members 65a, 65b, 65c, 65d, 65e, and 65f if the operator closes the door 250 without performing any special operation. Since it is restrained, workability is excellent.

  As for the configuration of the switch mechanism 69, when it is detected that the opening / closing member is locked to the covering member by the locking member or the opening / closing member is in a state of closing the opening of the frame, Other configurations may be used as long as the configuration is energized. Further, as detection means for detecting that the opening / closing member is locked to the covering member by the locking member, or that the opening / closing member is in a state of closing the opening of the covering member, sensors such as an optical sensor, Or a touch switch etc. are mentioned.

  In the case of the present embodiment, since the power supply source to the electromagnet is a generator linked to the engine 5, the electromagnet is not energized when the engine 5 is not operating, but the vibration propagates to the cabin 12. Sometimes there is no problem because the engine is usually operating.

  In this embodiment, as a means for fixing the opening / closing member to the cabin frame in addition to the hinge and the locking member, a permanent magnet or electromagnet is provided as a restraining actuator on the cabin frame side, and the permanent magnet is provided on the opening / closing member side. Alternatively, the electromagnet is provided with a restrained member made of a magnetic material that is restrained by a magnetic force. (1) A smooth surface on which a suction cup capable of sucking air is provided on the cabin frame side and the suction cup can be adsorbed on the opening and closing member side. Or (2) an actuator comprising a solenoid (having a sliding pin) or an air cylinder, a hydraulic cylinder or an electric cylinder is provided on the frame side of the cabin, and the periphery of the opening / closing member is pressed against the frame side (Or attract), or press outward, or hold the peripheral edge of the opening / closing member Or (3) a hollow tube is affixed to the outer periphery of the door (for example, using a tube instead of the weather strip 64), and the hollow portion of the tube The same effect can be achieved as a configuration for sending air to the.

The left view of the tractor which is one form of the structure of the working vehicle which concerns on this invention. The disassembled perspective view which shows the flame | frame of the cabin which concerns on this invention. The side view which shows the 1st structural example of the door of the cabin which concerns on this invention. The front schematic diagram which shows the 1st structural example of the door of the cabin which concerns on this invention. The front schematic diagram which shows the 2nd structural example of the door of the cabin which concerns on this invention. The front schematic diagram which shows the Example of the door of the cabin which concerns on this invention.

12 cabin 50 door (opening and closing member)
62 Hinge 63 Locking member 65a / 65b / 65c / 65d / 65e / 65f Restrained member 75a / 75b / 75c / 75d / 75e / 75f Permanent magnet (restraining actuator)
201 Tractor (work vehicle)

Claims (4)

The cabin (12) is constituted by a side frame unit (20) and a door (50) provided in an opening provided in a part of the side frame unit (20) so as to be openable and closable. ) Is attached to the side frame unit (20) by hinges (62, 62), and the other end of the door (50) can be locked to the side frame unit (20) by a locking member (63). When a constrained member (65a...) Composed of one or more magnetic bodies is provided on the peripheral edge of the door (50), and the door (50) is closed in the side frame unit (20). Is provided with a restraining actuator composed of an electromagnet (175a...) At a position facing the restrained member (65a...), And power to the electromagnet (175a. Supply is performed by a generator (67) interlocked with the drive source of the work vehicle, and a switch mechanism (69) for detecting that the locking member (63) has locked the door (50) to the side frame unit (20). , And the switch mechanism (69) and the electromagnet (175a ...) are interlocked . The cabin of a work vehicle according to claim 1, wherein when the shape of the door (50) is substantially polygonal, the restrained member (65a ...) is provided at a corner of the door (50). Features a cabin of a working vehicle. The cabin of a work vehicle according to claim 1, wherein when the shape of the door (50) is substantially polygonal, the restrained member (65a ...) is provided at a substantially central portion of the side of the door (50). A working vehicle cabin characterized by that. The work vehicle cabin according to claim 1, wherein an elastic member (66) is interposed between the restrained member (65a ...) and the door (50) .

Images