JP4376024B2 - Opening and closing mechanism of rear side panel in work vehicle - Google Patents

Description

  The present invention relates to an opening / closing mechanism for a rear side panel in a work vehicle such as a tractor.

Conventional tractor cabins have a rear side panel that can be opened and closed in a front open state on the left and right sides of the seat (see, for example, Patent Document 1).
Japanese Patent No. 3333088

  However, the rear side panel is set to have a small opening when fully opened.For example, the rear side panel is sufficient for taking in outside air into the cabin, but it cannot be opened sufficiently when looking out of the cabin. There was a fault that it was bad.

The open / close mechanism for the rear side panel in the work vehicle according to the present invention for solving the above-described problems is provided so that the rear side panel 11 positioned on the left and right sides of the seat 8 in the cabin 4 can be opened and closed so as to be in the open state of the front opening. In a work vehicle in which the rear side panel 11 is fully opened at a predetermined opening, an opening / closing restricting tool 23 is provided between the cabin 4 and the rear side panel 11, and the opening / closing restricting tool 23 is placed in a fully opened state of the rear side panel 11. The rear side panel 11 can be positioned at an opening degree that is allowed to be fully opened, and the open / close restricting tool 23 is positioned by the open / close restricting tool 23 at an open position at least where the rear side panel 11 is not fully opened. In this state, the front end of the rear side panel 11 projects outward from the outer end of the flange 14 of the roof 13 of the cabin 4. Strangely configured, also, the rear side panel 11 biases the closing direction in the rear side panels 11 are fully closed state, the urging and beyond the fulcrum to open a predetermined angle rear side panels 11 against the biasing force in the opening direction The first feature is that the gas spring 22 is provided between the cabin 4 and the rear side panel 11 so as to be biased .

Second, the opening / closing restricting tool 23 includes a link arm 23A having one end pivotally supported on the cabin 4 side, and a link arm 23B having one end pivotally supported on the rear side panel 11 side. And a pin 26 protruding from the link arm 23A is inserted into a slide hole 24 formed in the link arm 23B, and the pin is moved when the rear side panel 11 is biased from the closed state to the opening direction. 26 is engaged with the locking hole 24b of the slide hole 24, so that the rear side panel 11 is automatically positioned at an intermediate opening degree until it is fully opened.

Thirdly , the open / close restrictor 23 is provided so as to be swingable, and the positioning at the midway position of the rear side panel 11 is released by the swinging operation of the open / close restrictor 23.

Fourth, the open / close restrictor 23 is provided above the rear side panel 11.

  According to the structure of the present invention configured as described above, since the rear side panel can be positioned at a predetermined opening from the closed state to the fully opened position, for example, outside air intake into the cabin, The panel can be easily switched between the fully opened state, and the workability is improved. At this time, by urging the rear side panel and attaching it, the operator in the driver's seat can easily switch to each open position by releasing the closed state of the rear side panel.

  In particular, the open / close restrictor is configured to automatically position the rear side panel at an intermediate position until the rear side panel is fully opened when the rear side panel is moved from the closed state to the open direction. When the door is opened from the rear side, it is always stopped once in the small opening state (fixed position where the opening angle is smaller), so that the rear side panel can be prevented from being largely opened unexpectedly by the operator.

  Further, the opening / closing regulator is provided so as to be swingable, and the rear side cover can be moved by swinging the opening / closing regulator by adopting a configuration in which the positioning of the rear side panel is canceled by the swinging operation of the opening / closing regulator. There is also an advantage that it can be easily positioned in the open state at the next largest opening, and the switching operation is further facilitated.

  In addition, by providing the opening / closing restriction tool above the rear side panel, not only can the opening / closing restriction tool be easily arranged, but also the contact between the opening / closing restriction tool and the operator in the driver's seat is prevented, which hinders the opening / closing operation. In addition to this, there is an effect that an erroneous operation can be prevented.

  The opening / closing restrictor is configured such that the front end of the rear side panel does not protrude outward from the outer end of the vehicle body with the rear side panel positioned at an open position excluding the fully opened position by the opening / closing restricting tool. Since the rear side panel does not protrude outward from both side edges of the fuselage, there is an advantage that the rear side panel can be easily handled.

  1 to 3 are a side view, a plan view, and a rear view of a tractor that is a work vehicle provided with a rear side panel opening / closing mechanism according to the present invention, and a cabin on the rear side of an airframe 3 having front and rear wheels 1 and 2. 4 is provided. A driver seat 6 is provided in the cabin 4, and a seat 8 is provided in the driver seat 6, that is, in the cabin 4 so as to be positioned above the engine 7.

  The cabin 4 is provided with a door 9 that opens to the left on the left side. The operator (operator) opens the door 9 and gets into the cabin 4, enters the driver's seat 6, and enters the seat 8. Sit down and drive the tractor.

  The left and right sides of the seat 8 in the cabin 4 are rear side panels. In the case of the cabin 4 of the present embodiment, the rear side panel is a rear side glass 11 made of glass. At this time, the rear side glass 11 is attached to the rear vertical column 12 of the cabin 4 via a hinge 15 so that the rear side glass 11 is fully opened at a predetermined opening (approximately 90 degrees from the fully closed state). It is supported to open and close freely.

  A lock handle 16 is provided inside the cabin in front of the rear side glass 11, and the rear side glass 11 can be locked in the fully closed state by the lock handle 16. By releasing this lock, the rear side glass 11 is locked. The glass 11 can be opened.

  As shown in FIG. 4, an opening / closing mechanism 18 of the rear side panel 11 is interposed between the rear side glass 11 and the frame 17 of the cabin 4, and the rear side glass 11 is entirely moved by the opening / closing mechanism 18. An open state is maintained at a predetermined opening degree at an intermediate position between the closing and full opening, that is, opening and closing stepwise from full closing to full opening.

  In the present embodiment, the rear side glass 11 is positioned at a predetermined opening degree (less than 90 degrees) on the way to full opening by the opening / closing mechanism 18, that is, the rear side glass 11 is opened and closed in two stages, and is fully closed and fully opened. With one intermediate open position.

  On the other hand, a roof 13 is provided above the cabin 4, and the upper side of the driver's seat 6 is covered by the roof 13. At this time, the left and right rear portions of the roof 13 protrude outward at the position above the left and right rear side glasses 11 to constitute a flange 14 above the rear side glass 11.

  The intermediate side open position of the rear side glass 11 is set such that the outer end (front end) of the rear side glass 11 does not protrude outward from the outer end (outer end of the fuselage 3) of the collar part 14, and the rear side glass 11 When 11 is opened at the intermediate open position, the rear side glass 11 does not protrude outside the flange 14 (airframe 3).

  As a result, the opening of the rear side glass 11 is always located below the flange 14 when the rear side glass 11 is in the intermediate open position, preventing rain and the like from entering the cabin 4 from the opening of the rear side glass 11. Even in the case of rain or the like, the rear side glass 11 can be opened and fresh air can be taken into the cabin 4.

  Further, at the intermediate open position of the rear side glass 11, the outermost end of the flange portion 14 is always located outside the rear side glass 11. Therefore, the obstacle 14 located around the tractor is opened by the flange portion 14 in the rear side glass. The contact with the side 11 is prevented, and the rear side glass 11 can be easily handled.

  In addition, by making the rear side glass 11 into a fully opened state, it is possible to take out a face and a hand from the opening portion of the rear side glass 11 and complete the work without opening the door. For example, it is possible to easily check visually when working or driving in a narrow place such as near the shore or to easily communicate with people outside the tractor.

  Next, the aforementioned opening / closing mechanism 18 will be described. As shown in FIGS. 5A and 5B, the opening / closing mechanism 18 includes a fulcrum shaft 19 protruding from the frame 17 on the roof 13 side of the cabin 4 and a bracket 21 fixed to the upper portion of the rear side glass 11. It is comprised by the gas spring 22 and the opening / closing control tool 23 which are provided between.

  The gas spring 22 is pivotally supported by the end of the case 22a on the fulcrum shaft and the end of the slide rod 22b on the bracket 21 so as to urge the rear side glass 11 in the closing direction in the fully closed state. When the rear side glass 11 is opened at a predetermined angle against the urging force of the gas spring 22, the end of the slide rod 22 b exceeds the fulcrum and is attached so as to urge the rear side glass 11 in the opening direction. The lock handle 16 locks the rear side glass 11 in the fully closed state by locking the cabin 4 to the stopper plate 25 on the frame side, and the front side of the rear side glass 11 is pressed against the weather strip 20 in the fully closed state. .

  The opening / closing restricting tool 23 includes a link arm 23A having one end pivotally supported on the fulcrum shaft 19 and a link arm 23B having one end pivotally supported on the bracket 21. The pin 26 protruding from the link arm 23 </ b> A is inserted into the slide hole 24 formed in the link arm 23 </ b> B and is prevented from being removed by the washer 27.

  In the slide hole 24, a locking hole 24b that is offset with respect to the long hole 24a is continuously formed at the end of the linear long hole 24a on the bracket 21 side, and the entire rear side glass 11 shown in FIG. The pin 26 is located at the end of the long hole 24a on the bracket side in the closed state, and the pin 26 is located at the end of the long hole 24a on the fulcrum shaft 19 side in the fully opened state shown in FIG. 6 (a). It is arranged in.

  Thus, when the lock of the closed state by the lock handle 16 is released and the rear side glass 11 is gradually opened, it is necessary to manually open until the end of the slide rod 22b of the gas spring 22 exceeds the fulcrum, but the slide rod 22b. After the end of the fulcrum exceeds the fulcrum, the gas spring 22 urges the rear side glass 11 in the opening direction, and the rear side glass 11 automatically opens.

  However, as the rear side glass 11 is turned to the open side, the link arm 23B swings about the fulcrum on the bracket 21 side, and the pin 26 engages with the locking hole 24b as shown in FIG. 6B. To do. The engagement between the pin 26 and the locking hole 24b restricts the swinging of the rear side glass 11 in the opening direction. That is, the pin 26 and the locking hole 24b are engaged while the rear side glass 11 is fully opened. The rear side glass 11 is maintained at the intermediate open position.

  At this time, the rear side glass 11 is positioned from the fully closed state to the intermediate open position only by manually opening the rear side glass 11 until the end of the slide rod 22b exceeds the fulcrum, and the end of the slide rod 22b exceeds the fulcrum. After that, it is automatically performed by the urging force of the gas spring 22.

  In the state where the rear side glass 11 is located at the intermediate open position, the gas spring 22 urges the rear side glass 11 in the opening direction, so that the link arm 23B moves in the same direction as the opening direction of the rear side glass 11 (Y direction). ) To move the pin 26 into the long hole 24a, the pin 26 slides in the long hole 24a, and the rear side glass 11 automatically moves to the fully open state, as shown in FIG. 6 (a). It is kept fully open.

  As described above, switching from the fully closed state of the rear side glass 11 to the intermediate open position and switching of the open position can be easily performed. In particular, the rear side glass 11 is moved from the intermediate open position only by swinging the link arm 23B. Then, it can be positioned in the open state at the next largest opening (full open in the case of this embodiment), and the switching operation of the open position of the rear side glass 11 can be easily performed with one touch.

  Further, switching from the closed state to the intermediate open position can be easily performed only by releasing the lock by the lock handle 16 and manually opening the rear side glass 11 until the end of the slide rod 22b exceeds the fulcrum. At this time, simply releasing the lock by the lock handle 16 causes the gas spring 22 to urge the rear side glass 11 to the closed side, and there is no inconvenience that the rear side glass 11 suddenly opens as the lock is released.

  When the rear side glass 11 is closed, the operator can easily perform the operation by holding the lock handle 16 from the cabin 4 and pulling it toward the front side (cabin side). Since it opens 90 degrees laterally, the operator can easily hold the lock handle 16 even when the rear side glass 11 is fully opened, and can be easily closed.

  Since the weight of the rear side glass 11 is received by the hinge 15, the gas spring 22 only needs to urge the rear side glass 11 to prevent vibration of the rear side glass 11 when the rear side glass 11 is fully opened. Since the urging force of the gas spring 22 can be reduced, a large operating force is not necessary.

  The opening / closing mechanism 18 is configured as described above, and when the rear side glass 11 is opened from the fully closed state, the rear side glass 11 is always stopped once in the small open state (intermediate open position), and the rear side glass 11 unexpected by the operator is not expected. Large opening (full opening) is prevented, and the workability of the opening operation of the rear side glass 11 is improved. In addition, since the opening / closing restriction 23 is provided above the rear side glass 11 together with the gas spring 22, the opening / closing mechanism 18 including the opening / closing restriction 23 is easily disposed in a space-saving manner, and the opening / closing mechanism 18 side, particularly the opening / closing restriction, is provided. Contact between the tool 23 and the operator in the driver's seat 6 is prevented, and not only does not disturb the opening / closing operation, but also erroneous operation is prevented. As described above, the open / close restrictor 23 including the two link arms 23A and 23B and the gas spring 22 are simply configured with a small number of parts.

  In addition, by providing a plurality of stages of the locking holes 24b toward the end of the long hole 24a on the fulcrum shaft 19 side, the rear side glass 11 can be positioned and maintained in a plurality of stages before being fully opened, and the opening degree is small. From the one to the larger one, the switching can be performed easily and automatically only by swinging the link arm 23B, and an opening / closing mechanism with high operability can be obtained with a simple mechanism.

It is a side view of a tractor. It is a top view of a tractor. It is a rear view of a tractor. It is a perspective view of the cabin which shows an opening-and-closing mechanism part. (A) is a top view of an opening-and-closing mechanism part, (b) is AA sectional drawing of (a). (A) is a principal part top view which shows the fully open state of a rear side glass, (b) is a principal part top view which shows the state of the intermediate open position of a rear side glass.

4 cabin 8 seat 11 rear side glass (rear side panel)
23 Opening / closing regulator

Claims (4)

A rear side panel (11) positioned on the left and right sides of the seat (8) in the cabin (4) is provided to be openable and closable so as to be in a front open state, and the rear side panel (11) is fully opened at a predetermined opening. In this work vehicle, an open / close restricting tool (23) is provided between the cabin (4) and the rear side panel (11), and the open / close restricting tool (23) is allowed to be fully opened in the rear side panel (11). In addition, the rear side panel (11) can be positioned with an opening degree in the middle of full opening, and the open / close restricting tool (23) is at least fully opened by the open / close restricting tool (23). So that the front end of the rear side panel (11) does not protrude outward from the outer end of the flange (14) of the roof (13) of the cabin (4). Form, also the rear side panel (11) in the rear side panel (11) is fully closed biased in the closing direction, opening the predetermined angle rear side panel (11) against the biasing force when the opening and beyond the fulcrum A mechanism for opening and closing a rear side panel in a work vehicle, in which a gas spring (22) is provided between the cabin (4) and the rear side panel (11) so as to be biased in the direction . The opening / closing regulator (23) has a link arm (23A) having one end pivotally supported on the cabin (4) side and one end pivotally supported on the rear side panel (11) side. A link arm (23B), and a pin (26) protruding from the link arm (23A) is inserted into a slide hole (24) formed in the link arm (23B). ) In the urging movement from the closed state to the opening direction, the pin (26) engages with the locking hole (24b) of the slide hole (24) to automatically open the rear side panel (11). The opening / closing mechanism for the rear side panel in the work vehicle according to claim 1 , wherein the opening / closing mechanism is positioned at an intermediate opening. The work vehicle according to claim 1 or 2 , wherein the open / close restricting tool (23) is provided so as to be swingable, and the positioning at the midway position of the rear side panel (11) is released by a swinging operation of the open / close restricting tool (23). Opening and closing mechanism of the rear side panel. The opening / closing mechanism of the rear side panel in the work vehicle according to claim 1, 2 or 3 , wherein the opening / closing restricting tool (23) is provided above the rear side panel (11).

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