JP4898480B2 - Opening and closing hinges - Google Patents

Description

  The present invention relates to hinges such as doors and opening / closing windows, and in particular, in a cabin such as a tractor or a combiner, the doors and windows can be opened / closed around a vertical rotation axis and held during opening / closing (turning). The present invention relates to a technology including a mechanism.

Conventionally, in a working vehicle such as a tractor or a combiner, a driving part is covered with a cabin so that the user can work comfortably. And the window provided in the cabin that can be opened and closed can be held in the middle position between the fully open position and the fully closed position so that the outside air can be easily taken in by traveling with the window opened halfway. This technique is known (see, for example, Patent Document 1).
JP 2005-97852 A

  A conventional rear side glass opening / closing mechanism requires a fulcrum shaft, a bracket, a gas spring, and an opening / closing restricting tool, and the opening / closing restricting tool has two link arms and a pin for connecting both of them. Needs to open a long hole. As described above, the conventional structure has a complicated structure with a large number of parts, which increases the number of assembly steps and increases the cost. Therefore, the present invention is intended to provide a structure in which the opening / closing window can be easily held in the middle of full opening and full closing with a simple configuration.

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
In claim 1, the cabin (9) includes a front frame (20, 20) erected on the front left and right, a rear frame (21, 21) erected on the rear left and right, and the front frame (20 ) And a side frame (22) erected between the rear frame (21), and a door (24) is disposed between the front frame (20) and the side frame (22). A side glass (25) serving as an opening / closing window is disposed between (21) and the side frame (22), a locking device (31) is provided on one side of the side glass (25) serving as the opening / closing window, and a hinge is provided on the other side. (30) is provided so that the hinge (30) can be opened and closed by rotating in the left-right direction. The hinge (30) is fixed to the main body side, and the movable part (35) is fixed to the side glass (25) side. And projecting downward from the end of the movable part (35) Constituted by a pivot shaft that the fixed part (36) is inserted rotatably (37), fixed to protrude through the regulating pin (38) in the middle portion in the axial perpendicular direction該枢shaft (37) In addition, a plurality of V-shaped locking recesses (36c, 36d, and 36e) in which the restriction pins are fitted to the upper surface of the boss portion of the fixed portion (36) that pivotally supports the pivot shaft (37). ) To form a holding mechanism and urge the pivot shaft (37) downward between the pivot shaft (37) and the boss portion (36a) of the fixing portion (36). An elastic member (41) is provided, and the restriction pin (38) when the side glass (25) is in the fully closed position is positioned on the closed side slope of the locking recess (36c) configured in a V shape when viewed from the side. It is composed .
According to a second aspect of the present invention, in the hinge of the opening / closing window according to the first aspect, the locking device (31) and the holding mechanism are provided at substantially the same height .

As effects of the present invention, the following effects can be obtained.
According to the first aspect of the present invention, when the window is rotated and opened in the opening direction, the restricting pins are fitted into the locking recesses at a plurality of positions and can be held at a plurality of positions, and held in a slightly opened state. Can be ventilated or can be heard from outside by rotating to the fully open position, and can be turned in the closing or opening direction by vibration or inertial force during driving. Can be prevented.
Also , by urging the pivot shaft downward, the fitting force between the locking recess and the regulating pin can be increased, the window can be maintained with an appropriate force, or even to another holding position. The opening / closing position of the window can be easily changed by rotating.
When the window is rotated to the closed position, the restriction pin is fitted and held in the locking recess, and the window rotates in the closing direction as the restriction pin tries to slide down the slope of the locking recess. If you forget, you won't open the window unexpectedly, and you can easily lock it.

Since it is configured as in claim 2, the height of the locking device and the hinge are different, there was a take twisting excessive force the hinge when closed and locked the window, that substantially the same height, unreasonable Force is not applied, operability is improved, and the burden on the hinge is reduced.

  Next, embodiments of the invention will be described. 1 is an overall side view of a work vehicle having a hinge of an opening / closing window of the present invention, FIG. 2 is a perspective view of a side glass, FIG. 3 is a perspective view of an upper hinge, FIG. 4 is a plan view of the upper hinge, and FIG. FIG. 6 is a view showing the engagement groove in the closed position, FIG. 7 is a plan view showing another embodiment of the hinge, FIG. 8 is a side view, FIG. 9 is a plan view in the vicinity of the seat, and FIG. It is a perspective view of a panel.

  First, a schematic configuration of a crawler tractor with a cabin including a hinge of an opening / closing window according to the present invention will be described with reference to FIG. In addition, the arrow A direction in FIG. 1 is demonstrated as the front. Further, the hinge of the opening / closing window of the present invention is not limited to the cabin of a tractor, but can be applied to windows and doors of cabins of agricultural work vehicles, construction vehicles, and other traveling vehicles. As shown in FIG. 1, the crawler tractor includes a pair of left and right crawler type traveling devices 1. An engine 3 is disposed above the front portion of the crawler type traveling device 1. A mission case 2 is arranged above the rear part. The engine 3 is fixed between the engine frames 6 and 6 arranged on the front left and right lower sides of the crawler tractor and is covered with a bonnet 4. A dashboard is provided behind the bonnet 4, and a steering handle 7 that performs a steering operation of the aircraft is projected from the dashboard. In addition, a seat 8 is provided behind the steering handle 7, and a driving unit is configured by the steering handle 7, the seat 8, a step, and the like, and the driving unit is covered with a cabin 9. At the rear part of the mission case 2, a work implement mounting device including a lower link 17 and a top link for mounting the work implement is mounted.

  The crawler type traveling device 1 is supported by a track frame 15, and idlers (driven sprockets) 12 and 12 are rotatably supported at the front end portion and the rear end portion of the track frame 15. .. Are rotatably supported between the front and rear idlers 12 and 12. A drive sprocket 11 supported by an axle 16 projecting left and right from the transmission case 2 is disposed obliquely above and forward of the rear idler 12. A crawler belt 14 is wound around the drive sprocket 11, the idlers 12 and 12, and the rollers 13 and 13 to constitute a pair of left and right crawler type traveling devices 1.

  The cabin 9 has front frames 20 and 20 erected on the left and right of the front part, rear frames 21 and 21 erected on the left and right of the rear part, and left and right parts erected between the front frame 20 and the rear frame 21. Side frames 22 and 22, front frames 20 and 20, rear frames 21 and 21, a roof frame fixed on top of side frames 22 and 22, a roof 23 covering the roof frame, and left and right front frames 20 A windshield disposed between the rear frames 21 and 21, a door 24 disposed between the front frame 20 and the side frame 22, and the rear frame 21 and the side frame 22. The side glass 25 etc. used as the opening / closing window arrange | positioned between are provided. The rear glass is configured to be openable and closable by rotating upward and rearward and the door 24 and the side glass 25 rotating outward.

  As shown in FIGS. 2 and 3, one side of the side glass 25 is supported by a hinge so as to be pivotable by a hinge (the rear side in this embodiment, and the left and right sides when arranged in the left-right direction). The side can be locked by a lock device 31. The lock device 31 is attached to the front inner side of the side glass 25 and includes a lock lever, a handle, a knob, or the like, and is locked to a lock engaging portion provided on the inner side of the side frame 22. The rear hinge includes an upper hinge 30U having the holding mechanism of the present invention and a lower hinge 30D having no holding mechanism. The lower hinge 30D has a plate-like movable portion 32 attached to the rear lower portion of the side glass 25, and a rear frame. A boss-like fixed portion 33 attached to the lower portion of the lower portion 21 and a pivot shaft 34 constituted by a pin or the like for connecting the movable portion 32 and the fixed portion 33 to each other. And is supported rotatably.

  As shown in FIGS. 1 and 2, the upper hinge 30 </ b> U is disposed behind the lock device 31 and has substantially the same height. In the present embodiment, the locking device 31 is disposed at a position slightly lower than the upper hinge 30U, and the locking device 31 has a substantially shoulder height when the operator is seated on the seat 8. With this configuration, the operator can easily perform the locking operation, and the upper hinge 30U has a reduced torsional load, improving operability. However, in this embodiment, a holding mechanism is provided on the upper hinge, but a holding mechanism can also be provided on the lower hinge. In this case, the locking device is disposed in front of the upper hinge and the lower hinge.

  As shown in FIGS. 3 to 5, the upper hinge 30U includes a plate-like movable part 35 attached to the rear upper part of the side glass 25 (window side) and a boss attached to the upper part of the rear frame 21 on the main body side. And a pivot shaft 37 that pivotally connects the movable portion 35 and the fixed portion 36. The upper portion of the side glass 25 is rotatably supported with respect to the rear frame 21.

  The upper portion of the pivot shaft 37 is integrally fixed to the rear end portion of the movable portion 37 by welding or the like, and the shaft portion protrudes downward so that it can be inserted into the fixed portion 36. A regulating pin 38 is fixed to the middle of the upper and lower portions of the pivot shaft 37 with both ends projecting in a direction perpendicular to the shaft center (diameter direction). However, the structure which protrudes to one side may be sufficient. An elastic body that biases the pivot shaft 37 downward is disposed between the pivot shaft 37 and the fixed portion 36. That is, a washer 40 is fixed to the lower end of the pivot shaft 37 by a nut 39, and a coil spring 41 is externally fitted to the pivot shaft 37 as an elastic body between the washer 40 and the fixing portion 36. Thus, the pivot shaft 37 is urged downward by the coil spring 41.

  The fixing portion 36 includes a boss portion 36a and an attachment portion 36b. The boss portion 36a is formed in a pipe shape so that the pivot shaft 37 is rotatably inserted. The attachment portion 36b is fixed to the rear frame 21 on the main body side. ing. A plurality of locking recesses (locking grooves) 36c, 36d, and 36e that are substantially V-shaped when viewed from the side are provided on the upper surface of the boss portion 36a so as to be engageable with the restriction pin 38, thereby constituting a holding mechanism. ing. The locking recess is substantially V-shaped, and the inclination angle and size thereof are the opening / closing operation force (weight) and holding force of the side glass 25, the spring force of the coil spring 41, and a regulation pin 38 described later. It is formed in a suitable shape according to the diameter and the like.

  That is, the locking recesses 36c, 36d, and 36e can hold the side glass 25 by engaging with the regulation pin 38 at a predetermined rotational position. It slips out of the locking recess, rides on the upper surface of the boss 36a, slides and rotates, and enters the next locking recess. In this embodiment, the locking recess 36c engages with the restriction pin 38 in a position where the side glass 25 is closed, and the locking recess 36d engages and holds the restriction pin 38 in a half open position. The recess 36e is configured to be able to be held by being engaged with the regulation pin 38 in the fully opened position. In this embodiment, the fully open position is a position where the side glass 25 is opened approximately 90 degrees, and the half open position is a position opened approximately 45 degrees. However, the holding position, the number of holding positions, and the fully opened angle are limited. is not.

  In the state where the side glass 25 is closed, as shown in FIG. 6, the positional relationship between the locking recess 36c and the restriction pin 38 is such that the restriction pin 38 is located in the middle of the inclined surface in the closing direction of the locking recess 36c. It is configured as follows. In other words, the restriction pin 38 is configured to be located between the start end 36f of the locking recess 36c and the valley. That is, the side glass 25 is rotated in the closing direction, the restriction pin 38 enters the locking recess 36c before the closing position, and the restriction pin 38 is located on the slope before reaching the valley of the locking recess 36c in the position where the side glass 25 is closed. To position. With this configuration, when the side glass 25 is closed, the regulation pin 38 tries to slide downward (valley side) along the slope of the locking recess 36c due to the weight of the side glass 25 and the biasing force of the coil spring 41. The side glass 25 is always urged in the closing direction at the closed position, and the side glass 25 is not easily opened even if the lock is forgotten. Further, when the lock device 31 is operated, it is not necessary to operate a lever or the like while closing the side glass 25, and the operation is simplified. Note that, in the half-open position and the fully-open position, the regulation pin 38 is located in the valley portion of the locking recess.

  Further, the start end (boundary portion between the upper surface of the boss portion 36a and the slope of the locking recess 36c on the closing side) 36f of the locking recess 36c is a weather strip (made of rubber or the like provided around the side glass 25 when closed). The inner surface of the rear side of the sealing material 42 is made to coincide with the position where it contacts the outer surface of the rear frame 21. With this configuration, the weather strip 42 and the rear frame 21 abut when the side glass 25 is closed. At this time, even if the side glass 25 is urged in the opening direction by the elasticity of the weather strip 42, The side glass 25 is not opened by the urging force in the closing direction along the inclined surface to the stopper recess 36c, and it is possible to prevent intrusion of rainwater or the like without sealing and locking.

  When the side glass 25 is opened halfway (half-opened state), the regulation pin 38 engages with the locking recess 36d, and the side glass 25 is not greatly opened, but the wind can be guided into the cabin and ventilated. , Conversations, etc. can be performed easily. Further, when a large-diameter wheel or the like is attached to the outside of the rear wheel, the operation can be performed with the side glass 25 half open without being damaged. Furthermore, since it can hold | maintain even in the fully open state, the side glass 25 does not rock | fluctuate at the time of driving | running | working etc., and it can also prevent that it breaks vigorously and is damaged.

  Next, another embodiment of the holding mechanism will be described. In this embodiment, a detent mechanism is used as the holding mechanism. That is, as shown in FIGS. 7 and 8, the movable portion 45 is fixed to the rear portion of the side glass 25 in the same manner as described above, and the pivot shaft 47 is fixed to the rear portion of the movable portion 45 in the vertical direction. Then, the fixing portion 46 is fixed to the rear frame 21, and the pivot shaft 47 is inserted into the boss portion 46 a of the fixing portion 46. A pin 48 is inserted into and fixed to the upper portion of the boss portion 46a of the pivot shaft 47 in a direction perpendicular to the shaft center, and a washer 50 is fitted and locked to the pivot shaft 47 below the boss portion 46. The boss 46 is positioned between the pin 48 and the pin 48 to prevent it from coming off. Locking recesses (or locking grooves) 47c, 47d, and 47e are provided at predetermined intervals on the outer periphery of the pivot shaft 47 in the boss portion 46a. On the other hand, an insertion hole 46c is formed in a radial direction at the same height as the locking recesses 47c, 47d, and 47e in the boss portion 46a. A ball 51 and a spring 52 are inserted into the insertion hole 46c, and a bolt 53 is inserted. The insertion hole 46c is screwed and covered.

  When the side glass 25 is in the closed position, the ball 51 is fitted into the locking recess 47c, when the side glass 25 is half-opened, the ball 51 is fitted into the locking recess 47d, and when the side glass 25 is fully opened, The ball 51 is configured to fit into the recess 47e. Further, the locking recess 47c is formed in a semicircular shape in a plan sectional view, and the locking recesses 47d and 47e are formed in a V shape. Similarly to the above, the position where the starting end of the locking recess 47c abuts on the ball 51 coincides with the position where the rear inner surface of the weather strip 42 contacts the outer surface of the rear frame 21 when closed. When the side glass 25 is closed, the ball 51 abuts on the start end side with respect to the center of the locking recess 47c, and the side glass 25 is urged in the closing direction by the ball 51 as described above.

  With this configuration, as described above, when the side glass 25 is closed, the ball 51 is urged so as to be fitted into the locking recess 47c, and the position is maintained. Similarly, when the side glass 25 is half-opened, the ball 51 is biased so as to be fitted into the locking recess 47d, and when the side glass 25 is fully opened, the ball 51 is fitted into the locking recess 47e. Will be held at each position. Since this detent mechanism is disposed in the boss portion, it is not exposed, so that it is not clogged with dust and can be operated stably.

  In the cabin 9, as shown in FIG. 9, a main transmission lever 60, a position lever 61, an operation box 62, and the like are disposed on the side panel 67 on the right side in the traveling direction of the seat 8, and the left side panel 68 is A transmission lever 63, a PTO transmission lever 64, an accessory socket 65, a cup holder 66, and the like are arranged.

  As shown in FIGS. 9 and 10, the accessory socket 65 and the cup holder 66 are disposed close to each other at the rear portion of the side panel 68, and are disposed on the side of the backrest portion of the seat seat 8, It is located at a position that does not interfere with driving operations. The accessory socket 65 is configured as a cigarette lighter socket, and can be used as a power source for audio equipment and other accessories by connecting to a battery and inserting a power plug instead of the cigarette lighter. However, a switch, a lamp, or the like can be arranged instead of the accessory socket 65.

  The cup holder 66 has a substantially square shape in plan view, and a front recess 66a that can be accommodated by inserting a cigarette, a portable radio, a portable player, a mobile phone, etc. A rear recess 66b is provided, and the partition disposed at the boundary between the front recess 66a and the rear recess 66b is partially cut out at the center so that both recesses communicate with each other. With this configuration, when a PET bottle having a rectangular shape in plan view is inserted into the rear recess 66b, one corner can protrude from the front recess 66a and can be easily inserted.

  As described above, in the opening / closing window that is provided with the locking device on one side of the window in the front and back and the hinge on the other side and can be opened and closed by rotating in the left-right direction, the fixing portion that fixes the hinge 30 to the main body side. 36, a movable portion 35 fixed to the window side, and a pivot shaft 37 that protrudes downward from the end of the movable portion 35 and is rotatably inserted into the fixed portion 36. A restriction pin 38 is protruded and fixed in a direction perpendicular to the center, and a plurality of locking recesses for fitting the restriction pin 38 are provided on the upper surface of the boss portion 36a of the fixing portion 36 that pivotally supports the pivot shaft 37. Since the holding mechanism is formed, when the window is rotated and opened in the opening direction, the regulation pin 38 is fitted into the locking recesses at a plurality of positions, and can be held at a plurality of positions, and held in a slightly opened state. Or rotated to the fully open position and ventilated, Can as sound parts can hear, can be prevented from unnecessarily rotating in the closing direction or the opening direction by the inertial force during vibration or running.

  Further, since the coil spring 41 serving as an elastic member for biasing the pivot shaft 37 downward is provided between the pivot shaft 37 and the boss portion 36a, the pivot shaft 37 is biased downward. , The fitting force between the locking recess and the regulating pin 38 can be increased, and the window can be maintained with an appropriate force, or the opening / closing position of the window can be easily changed by rotating to another holding position. it can.

  Further, since the locking device 31 and the holding mechanism are provided at substantially the same height, if the locking device 31 and the hinge 30U are different in height, the hinge is twisted and an unreasonable force is applied when the window is closed and locked. However, by setting the heights to approximately the same level, excessive force is not applied, operability is improved, and the burden on the hinge is reduced.

  In addition, the restriction pin 38 when the window is in the fully closed position is configured to be positioned on the closed side slope of the locking recess 36c configured in a V shape when viewed from the side. The restriction pin is fitted and held in the stop recess, and the window rotates in the closing direction as the restriction pin tries to slide down the slope of the stop recess, so that even if you forget to lock, the window will open unexpectedly In addition, the lock operation can be easily performed.

The whole side view of a work vehicle provided with the hinge of the opening-and-closing window of the present invention. The perspective view of a side glass. The perspective view of an upper hinge. The top view of an upper hinge. Similarly side view. The figure which shows the engaging groove of a closed position. The top view which shows the other structural example of a hinge. Similarly side view. The top view of the seat seat vicinity. The perspective view of a side panel.

30 Hinge 31 Locking Device 35 Movable Part 36 Fixed Part 36a Boss Part 36c / 36d / 36e Locking Concave 37 Pivot Shaft 38 Regulating Pin 41 Elastic Member

Claims (2)

The cabin (9) includes a front frame (20, 20) erected on the front left and right, a rear frame (21, 21) erected on the rear left and right, and the front frame (20) and the rear frame (21 ) Between the front frame (20) and the side frame (22), and the rear frame (21) and the side frame. A side glass (25) serving as an opening / closing window is disposed between (22), a locking device (31) is provided on one side of the side glass (25) serving as the opening / closing window, and a hinge (30) is provided on the other side. The hinge (30) can be opened and closed by rotating in the left-right direction, a fixed part (36) for fixing the hinge (30) to the main body side, a movable part (35) for fixing to the side glass (25) side, and the movable part ( 35) Projecting downward from the end and turning to the fixing part (36) Capable constituted by a pivot shaft (37) to be inserted, it is fixed to protrude through the regulating pin (38) in the axial direction perpendicular to the middle portion of the該枢shaft (37), the pivot shaft ( 37) provided on the upper surface of the boss portion of the fixing portion (36) pivotally supporting the plurality of V-shaped locking recesses (36c, 36d, 36e) into which the restriction pins are fitted, Forming an elastic member (41) for biasing the pivot shaft (37) downward between the pivot shaft (37) and the boss portion (36a) of the fixed portion (36); The regulation pin (38) when the side glass (25) is in the fully closed position is configured to be positioned on the closed slope of the locking recess (36c) configured in a V shape when viewed from the side. Window hinges. The hinge of an opening / closing window according to claim 1, wherein the locking device (31) and the holding mechanism are provided at substantially the same height .

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