JPH09240402A - Tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cover a frame support with a simple structure of cover while facilitating the converting operation of a locking unit to fix a reversal protective frame in the erecting posture, in a tractor in which the reversal protective frame can be reversal-operated to the rear side of a machine body. SOLUTION: To a frame support 10 to support a reversal protective frame 5 allowable to undulate and fluctuate, a frame cover 20 to cover the frame support 10 is provided. This frame cover 20 furnishes an upward opening C1 to insert the reversal protective frame 5 in its erecting posture, and a rearward opening C2 to insert the reversal protective frame 5 in the falling posture. An operation lever 15 to conversion-operate a locking unit 13 to fix the reversal protective frame 5 at the erecting posture, to the operating position and the releasing position, is projected from the frame cover 20 to the rear side through the rearward opening C2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a fall protection frame to be swingably supported by a frame support portion on the machine body in an upright posture and a fall posture to the rear side of the machine body, and the fall protection frame is set up in the upright posture. The present invention relates to a tractor provided on the frame support portion so that a lock tool for fixing the posture can be switched between an operating position and a releasing position.

[0002]

2. Description of the Related Art The above-mentioned tractor uses the fall protection frame in a lying posture so that the protection frame does not hit shelves or trees in the orchard while working, or because of the protection frame, the height and the center of gravity of the entire machine are used. It is designed so that it can be stably stored or installed indoors or in a narrow space of a carrier bed, while preventing its height from increasing.

[0003]

In the above tractor, when the cover for covering the periphery of the frame support portion is provided, if the operating tool for the lock tool penetrates through the cover and projects laterally, the cover becomes complicated. Or the cover becomes difficult to assemble. Further, if the operation tool is also positioned inside the cover and covered with the frame support portion, it is necessary to remove the cover so that the operation tool can be operated when changing the posture of the fall protection frame, which is troublesome. Inconvenience occurs.
An object of the present invention is to allow a frame support portion to be covered with a cover having a relatively simple structure while allowing an operating tool for a locking tool to be easily operated.

[0004]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] The fall protection frame has a standing posture,
While supporting the frame support portion on the machine side so as to be swingable in the lying posture to the rear side of the machine body, the lock tool for fixing the fall protection frame in the standing posture is switchably operated and released. In a tractor provided in a frame support part, a frame cover having an upward opening and a rearward opening through which the fall protection frame is inserted and covering the frame support part is provided, and an operation tool for switching the locking tool is operated through the rearward opening. The frame cover is projected to the rear side of the machine body.

[Operation] While the operation tool for the lock tool is projected to the outside of the frame cover so that the operation can be performed without removing the frame cover, and the fall protection frame is designed to project in the fall position. The frame support is covered with the frame cover in a state where the rearward opening is used for projecting the operation tool.

[Effect] Even when the frame support portion has a complicated shape for supporting the overturn protection frame and the lock, it is possible to cover the periphery with a frame cover to improve the appearance. On the other hand, when changing the posture of the fall protection frame, it is now possible to change the posture easily and efficiently by switching the lock without operating the frame cover. Moreover, since the rearward opening is used for projecting the operation tool, the frame cover is formed to have no special opening for projecting the operation tool, so that the frame cover can be advantageously obtained in terms of economy and strength. became.

The structure, operation and effect of the invention according to claim 2 are as follows. [Configuration] In the configuration of the invention according to claim 1, a rear cover that covers the rear of the driver's seat is formed as a separate component from the frame cover, and the lateral end of the frame cover and the lateral end of the rear cover are provided. It is connected to the department.

[Operation] The frame cover and the rear cover are connected to each other to provide a good-looking state and an excellent strength.

[Effect] The frame cover can be made strong so that it can be supported by the rear cover, or the frame support can be covered in a good-looking state with high commercial value.

The structure, operation, and effect of the invention according to claim 3 are as follows. [Structure] In the structure of the invention according to claim 1 or 2,
A fender cover for covering the upper part of the top of the rear wheel fender is formed as a separate component from the frame cover, and the rear edge of the fender cover and the front edge of the front cover portion of the frame cover are provided. And are lined up in the front-back direction.

[Operation] The front end edge of the frame cover and the rear end edge of the fender cover are arranged front and back above the top plate portion of the rear wheel fender so that they are vertically overlapped with each other so that there is no gap between them. Even if you don't have them, you can place them in a good-looking state, such as when they are close and there are few gaps.

[Effect] The frame support portion and the rear wheel fender can be covered in a good-looking state to have high commercial value.

The structure, action, and effect of the invention according to claim 4 are as follows. [Structure] In the structure of the invention according to claim 1, 2 or 3, a reflector is attached to the rearward facing surface portion of the frame cover.

[Operation] A reflector can be equipped by using the frame cover as a mounting member.

[Effect] Compared to the case where a special bracket for mounting the reflector is provided, the reflector can be mounted in a simple and good-looking state at a low cost.

The structure, operation, and effect of the invention according to claim 5 are as follows. [Structure] In the structure of the invention according to claim 1, 2, 3 or 4, a turn indicator is attached to the frame cover.

[Operation] A direction indicator can be equipped by using the frame cover as a mounting member.

[Effect] Compared to the case where a special bracket for mounting the turn signal is provided, the turn signal can be provided in a simple and good-looking state at a low cost.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a driving section having a front wheel 1 and a rear wheel 2 so as to be drivable and having a steering wheel 3 for steering and manipulating the front wheel 1, a driving seat 4, and a driving seat. 4 to the rear part of the tractor provided with the overturn protection frame 5 and a rotary tiller so as to be lifted and lowered via a link mechanism 6 configured to swing up and down by a lift cylinder (not shown). Device 7
Is connected and the power is transmitted from the tractor to the rotary cultivator 7 by the rotary shaft 8 to form a riding-type cultivator.

As shown in FIG. 2, the fall protection frame 5 includes a pair of left and right main frame portions 5a, 5a and a horizontal frame portion 5b connecting the front end sides of both main frame portions 5a, 5a. It is made of a square pipe material bent into a gate shape so as to be provided, and as shown in FIGS. 4 and 6, a weight-reducing recess A is provided on the base end side of each of the left and right main frame portions 5a, 5a. The cast members are connected to form a connecting portion 5c. 2, 4 and 5
As shown in FIG. 1, a pair of left and right sheet metal frames 11 a, 11 a having the frame support portion 10, both sheet metal frames 11
By connecting the tipping protection frame support having the connection frame 11b connecting the a and 11a to the mission case 9 forming the rear part of the body of the tractor,
A frame support portion 10 having a U-shape in a plan view and opening rearward of the fuselage above the rear wheel fenders 30 on both sides of the rear of the fuselage.
Is formed. Left and right pair of frame support parts 10, 10
Inside one of the two, the pair of main boom parts 5a, 5
One connecting portion 5c of a is pivotally attached by a connecting shaft 12 in the lateral direction of the machine body, and the connecting portion 5c of the other main frame portion 5a is concentric with the connecting shaft 12 inside the other frame supporting portion 10. The tipping protection frame 5 is connected to the pair of frame support portions 10 by pivoting by the connecting shaft 12 in the lateral direction of the machine body so as to swing around the axial center of the connecting shaft 12 in the lateral direction of the machine body. is there. As a result, the fall protection frame 5 is swung about the axis of the connecting shaft 12 so that the fall protection frame 5 extends upward from the frame support portion 10 as shown by a solid line in FIG. 5a is switched between a standing position in which the driver's seat 4 is located above the driver's seat 4 and a lying position in which the horizontal frame portion 5a extends rearward from the frame support portion 10 and is located above the tilling device 7.

A lock 13 and a stopper 14 as shown in FIG. 6 for the fall protection frame 5, and these locks 13
Operating lever 1 for operating the stopper 14
5 and the like, and the fall protection frame 5 is
A device for fixing the step to the lying posture is provided in each of the pair of left and right foom support portions 10. The left and right tipping protection frame fixing devices are configured as shown in FIGS.

The lock 13 and the stopper 14 are fixedly supported by a support member 16 formed of a single round bar in the longitudinal direction of the machine body. The support member 16 is attached to the front plate portion 10a of the frame support portion 10 so as to be rotatable and slidable back and forth, and a lock spring 17 attached to a portion projecting forward from the front plate portion 10a. Sliding bias is applied to the side. The operation lever 15 is formed by one end on the rear side of the fuselage that is bent and formed to be bent about 90 degrees with respect to the portion of the support member 16 that supports the lock 13 and the stopper 14, and is supported by the operation lever 15. By rotating and sliding the member 16, the lock 13 and the stopper 14 are switched between the operation position and the release position.

That is, when the fall protection frame 5 is oscillated to the standing posture shown by the solid line in FIG. 1, the lock 13 is biased to move forward by the lock spring 17 as shown in FIG. 4 and FIG. For supporting the frame 10
A pair of left and right block bodies 1 provided on the opening side inside the
8 and 19, and the lock part abutting part S of the connecting part 5c with respect to the lock member
Enter between 1. Then, the lock member 13 is brought into the operating position to receive and support the fall protection frame 5 so as not to fall down rearward, and the front plate portion 10a of the frame support portion 10 is supported.
Receives and supports the fall protection frame 5 so as not to fall forward. Thereby, the fall protection frame 5 is fixed in the standing posture. At this time, since the lock surface of the lock member 13 that acts on the lock member abutting portion S1 is a wedge surface, the lock member 13 causes the connecting portion 5c to move the front plate portion by the urging force of the lock spring 17. A pressing operation is performed on 10a. As a result, the fall protection frame 5 is firmly fixed without rattling.

As shown in FIGS. 8 and 9, the lock 1
3 is in the operating position, the operating lever 15 is pulled to the rear side of the machine against the lock spring 17 to slide the support member 16, and the stopper 14 causes the block body 1 to move.
When it comes into contact with the stopper portion 19a formed by the inner end surface of 9,
The operation lever 15 is oscillated around the axis of the support member 16 so as to lie about 90 degrees inside the machine body. Then, the lock 13 is provided on the rear side of the frame support portion 10 at the support member 16
The front side surface of the lock 13 is rotated with the block body 18
It is possible to move the protrusion 5e forming the anti-locking member abutting portion S1 of the connecting portion 5a to the inner side of the frame supporting portion 10 at the action releasing position where it abuts on the stopper portion 18a which is the outer end surface of the frame supporting portion 10. To Along with this, stopper 1
4 rotates with the supporting member 16 inside the frame supporting portion 10 to the working position in which the supporting member 4 is lying sideways on the block body 18. Then, the stopper portion 18a comes into contact with the front side surface of the lock tool 13 and acts to receive the lock tool 13.
3 is held in the operation release position and the stopper 14 is held in the operation position against the biasing force of the lock spring 17.
As a result, the fall protection frame 5 can be operated to fall from the standing posture to the rear side of the fuselage. Then, when the stopper contact portion S2 of the connecting portion 5c contacts the stopper 14 as the fall protection frame 5 falls down, the stopper 14 locks the fall protection frame 5 so as not to descend any more. As a result, the fall protection frame 5 is in the upper laid-down posture shown by the dotted line in FIG. That is, when moving or working below obstacles, such as performing work under the shelf in an orchard, the fall protection frame 5 is moved while the tillage device 7 is raised so as not to hit the fall protection frame 5. The posture is to fall down so as not to hit the obstacle such as the shelf. At this time, the stopper 14 comes into contact with the stopper abutment portion S2 in a state where only the falling protection frame 5 is locked, and therefore, as shown in FIG. 10, when a rising operation force acts on the falling protection frame 5. , The stopper abutment portion S2 is lifted from the stopper 14, and the fall protection frame 5 freely rises and swings.

As indicated by the chain double-dashed line in FIG. 11, the operating lever 15 is pulled rearward of the machine body against the lock spring 17 from the state where the stopper 14 is in the operating position to slide the support member 16. . Then, the stopper 14
Is at the action release position away from the stopper contact portion S2 to the rear side, and enables the protrusion 5e to move further to the far side of the frame support portion 10. Thus, by maintaining the pulling operation of the operation lever 15 and holding the stopper 14 at the operation release position, the fall protection frame 5
Can be further lowered from the falling posture on the upper side. Then, as shown in FIG. 11, the fall protection frame 5
The lower part of the connecting portion 5c, the front plate portion abutting portion S3 of the connecting portion 5c.
Abuts against the inner surface side of the front plate portion 10a, the front plate portion 10a locks the fall protection frame 5 so as not to descend further. As a result, the overturning protection frame 5 is in the lower laying posture shown by the chain double-dashed line in FIG. That is, when the machine body is stored or mounted on a carrier, the fall protection frame 5 is mounted in the lowest posture.

After the overturn protection frame 5 is in the lower lying position, the stopper 14 is released even if the pulling operation of the operating lever 15 is released and the operating lever 15 returns to the front side of the machine due to the lock spring 17. It is irrelevant to maintaining the fall protection frame 5 in the lying posture by merely contacting the protrusion 5e of the connecting portion 5c. Then, at this time, when a lifting operation force is applied to the overturn protection frame 5, the overturn protection frame 5 naturally moves up while pushing the stopper 14 rearward on the block body 18 by the protrusion 5e as shown in FIG. Move.

As shown in FIGS. 1 to 3, each of the left and right frame supporting portions 10, 10 is covered with a frame cover 20. Any frame cover 20 for left and right
Is a resin cover, and the left frame cover 20
Are molded as shown in FIG.

The horizontal plate portion 21, the front plate portion 22 which is continuous to the front end side of the horizontal plate portion 21, and the bent plate portion 2 which is continuous to the lower end side of the front plate portion 22 and has a downward U-shape.
3, a top plate portion 24 continuous to the upper end side of the front plate portion 22 and the horizontal plate portion 21, a rear plate portion 25 continuous to the rear end side of the top plate portion 24 and the horizontal plate portion 21
And a first notch C1 at the lateral end side of the top plate portion 24, and a second notch C2 communicating with the first notch C1 at the lateral end side of the rear plate portion 25, and the bent plate portion. 23 is provided with a bulging portion 23a which bulges outward. As shown in FIGS. 2, 3 and 5, the rear cover of the driver's seat 4 is formed between the left and right rear wheel fenders 30, 30 as a separate component from the frame cover 20. The lateral end on the upper end side of the rear cover 40 and the left rear wheel fender 30
It is configured to be mounted over and above.

That is, the frame supporting portion 10 is inserted below the first notch C1, the lateral plate portion 21 is located laterally outward of the frame supporting portion 10, and the curved portion 23 of the front plate portion 22 is located. The lateral end portion 22a located above and the curved portion 23 are located on the front side of the frame support portion 10, the curved portion 23 is located on the top plate portion of the rear wheel fender 30, and the bulging portion 23a. The portion of the support member 16 projecting forward from the frame support portion 10 enters the inside of the
A top plate portion 24a located on the opposite side of the horizontal plate portion 21 with respect to the first cutout C1 of the top plate portion 24, and a horizontal plate for the second cutout C2 of the rear plate portion 25. The rear plate portion 25a located on the side opposite to the portion 21 is the frame support portion 1
The lateral end portion 22c of the front plate portion 22 located on the inner side of 0
The lateral end 24b of the top plate portion 24 and the lateral end portion 25b of the rear plate portion 25 enter the inside of the lateral end portion of the rear cover 40, and the operation lever 15 moves rearward from the second notch C2. The lateral end portions 22c of the front plate portion 22 and the lateral end portions 25b of the rear plate portion 25 are respectively fixed to the rear cover 35 with mounting screws.

That is, the horizontal plate portion 21 is the frame support portion 1.
0 laterally outside, and the front plate portion 22 is the frame support portion 10.
The top plate portion 24a of the top plate portion 24 is formed so as to cover the front side of the frame support portion 10 and the lateral inner side of the frame support portion 10. The first cutout C1 of the top plate portion 24 forms an upward opening C1 for inserting the fall protection frame 5 in the standing posture, and the second cutout C2 of the rear plate portion 25 forms the fall protection frame 5 in the lying posture. A rearward facing opening C2 is formed for inserting the. Edge 2 of front plate portion 22
2c, the end portion 24b of the top plate portion 24, and the end portion 25b of the rear plate portion 25 form a lateral end portion on the inside of the body of the frame cover 20, and the lateral end portion is formed on the lateral end portion of the rear cover 35. And the frame cover 20 and the rear cover 40 are integrated with each other, and the frame cover 20 is connected to the rear cover 4
0 is supported. The rearward opening C2 is also used as an opening for projecting the operation lever 15 from the frame cover 20 to the outside.

On the left lateral side of the driver's seat 4, there are provided a main traveling speed change lever for changing the traveling speed and a sub travel speed changing lever, and a work speed changing lever for changing the driving speed of the tilling device 7. A fender cover 37, which also serves as a lever guide that forms a guide groove for the lever and the work shift lever, is formed as a separate component from the frame cover 20, and is formed on the upper surface side of the top plate portion 31 of the left rear wheel fender 30. It is provided so as to cover the upper part of the portion 31. As shown in FIG. 4, the fender cover 37 and the frame cover 20 are arranged such that the rear end edge 37a of the fender cover 37 and the front end edge 23b formed of the front end edge 23b of the curved portion 23 of the frame cover 20 are aligned in the front-rear direction. And are placed. That is, the rear end of the fender cover 37 and the front end of the frame cover 20 are vertically stacked so that no gap is formed between them. Further, even if the end portions of the fender cover 37 and the frame cover 20 are not overlapped with each other, the rear end edge 37a of the fender cover 37 and the frame cover 20
It is possible to bring the front end edge 23b of the above into close proximity.

As shown in FIGS. 2 and 3, a reflector 38 is attached to a rearward facing surface portion of the rear plate portion 25 of the frame cover 20 to direct the direction to the outer surface side of the lateral plate portion 21 of the frame cover 20. A container 39 is attached. That is, the frame cover 20 is used as a mounting member for the reflector 38 and the direction indicator 39, and the reflector 38 and the direction indicator 39 are used.
Is equipped.

The frame cover 20 for the right side is different from the frame cover 20 for the left side in the left-right direction, and is otherwise formed in the same manner. Right rear wheel fender 30
On the top plate of the above, a fender cover which is also used as a lever guide of an elevating lever for vertically moving the tilling device 7 is provided, and the positional relationship between the fender cover and the frame cover is as follows: the left frame cover 20 and the rear wheel fender 30. It is set in the same manner as the arrangement relationship of.

The rear wheel fender 30 is manufactured by the manufacturing method shown in FIGS. That is, in FIG.
As shown in (a) and (b), by applying a press die to one sheet metal material P in the pressing direction A, the top plate portion 31, the side plate portion 32, and the top plate portion 31 of the rear wheel fender 30. Gear lever recessed portion 31a and side plate portion 3 located on the upper surface side of the
On the inner surface side of 2, the shift lever entry recess 32a and the reinforcing step 32b are press-molded all at once. Next, FIG.
As shown in (a) and (b), the unnecessary material portion Pa remaining around the top plate portion 31 of the sheet metal material P is cut and removed. After that, the side plate portion 32 is perforated, and the unnecessary material portion Pb remaining around the side plate portion 32 is cut to attach the fender 30 to the machine body as shown in FIGS. Bolt hole 32
While forming c, the unnecessary material portion Pb is cut and removed. Next, the top plate portion 31 is bent and punched, and bolt holes 31b for assembling the fender 30 to the machine body and outer edges of the top plate portion 31 are formed as shown in FIGS. 16 (a) and 16 (b). Bent part 31 located at the center in the longitudinal direction of the top plate part of the
Form c. After that, the top plate portion 31 is bent, and as shown in FIGS. 17 (a) and 17 (b), the bent portions 31 located at both ends of the outer edge of the top plate portion 31 in the top plate longitudinal direction.
forming d.

[Another Embodiment] In addition to the structure in which the fall protection frame 5 can be switched to the upper and lower two-stage lying posture, 1
The present invention can also be applied to a case where the switching postures that can be switched are configured to other than two stages, such as a configuration that can be switched only to a laying posture of three stages, or a configuration that can be switched to three folds of upper and lower stages. .

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of drawings]

FIG. 1 is a side view of the entire riding cultivator.

FIG. 2 is a rear view of a portion where the tractor has a fall protection frame.

FIG. 3 is a plan view of a fall protection frame disposing portion of the tractor.

FIG. 4 is a cross-sectional view of a fall protection frame fixing device and a frame cover.

FIG. 5 is a sectional view of a frame cover.

FIG. 6 is a perspective view of the fall protection frame fixing device in an exploded state.

FIG. 7 is a perspective view of the entire frame cover.

FIG. 8 is an explanatory view showing a fixed state of the fall protection frame in a standing posture.

FIG. 9 is an explanatory view showing a supporting state in the upper-side lying posture of the fall protection frame.

FIG. 10 is an explanatory diagram of upward swinging from the upper-side lying posture of the fall protection frame.

FIG. 11 is an explanatory view showing a supporting state in a lower-side lying posture of the fall protection frame.

FIG. 12 is an explanatory diagram of upward swinging from the lower-side lying posture of the fall protection frame.

FIG. 13 (a) is a perspective view of how to make a rear wheel fender, and 13 (b) is a cross-sectional view of the loro section of 13 (a).

FIG. 14 (a) is a perspective view of a procedure for making a rear wheel fender, and 14 (b) is a cross-sectional view of the loro section of 14 (a).

FIG. 15 (a) is a perspective view of how to make a rear wheel fender, and 15 (b) is a cross-sectional view of the loro section of 15 (a).

FIG. 16 (a) is a perspective view of a procedure for making a rear wheel fender, and 16 (b) is a cross-sectional view of the loro section of 16 (a).

FIG. 17 (a) is a perspective view of how to make a rear wheel fender, and 17 (b) is a cross-sectional view of the loro section of 17 (a).

[Explanation of symbols]

 4 Driver's seat 5 Fall protection frame 10 Frame support section 13 Locking tool 15 Control lever 20 Frame cover 30 Rear wheel fender 31 Top plate section 35 Rear cover 37 Fender cover 23b Front edge 37a Rear edge 38 Reflector 39 Direction indicator C1 upward Opening C2 Rearward opening

Claims (5)

[Claims] 1. A fall protection frame (5) is provided in a standing posture,
A lock tool (1) that allows the frame support portion (10) on the machine body side to swing freely in a lying posture to the rear side of the machine body and fixes the fall protection frame (5) in the standing posture.
A tractor provided on the frame support portion (10) so as to be operable to switch 3) between an operating position and a releasing position, the upward opening (C) into which the fall protection frame (5) is inserted.
1) and a frame cover (20) that has a rearward opening (C2) and covers the frame support portion (10), and an operating tool (1) for switching the locking tool (13).
The tractor 5) is made to project to the rear side of the body of the frame cover (20) through the rearward opening (C2). 2. A rear cover (35) for covering the rear of the driver's seat (4) is formed separately from the frame cover (20) and provided, and a lateral end portion of the frame cover (20) is provided. The tractor according to claim 1, wherein the rear cover (35) is connected to a lateral end portion of the rear cover (35). 3. A top plate portion (3) of a rear wheel fender (30).
1) A fender cover (37) that covers the upper side of the fender cover (37) is formed as a separate component from the frame cover (20), and the rear edge (37) of the fender cover (37) is provided.
a) and the front edge (23) of the frame cover (20).
The tractor according to claim 1 or 2, wherein (b) and (b) are arranged side by side in the front-rear direction. 4. The tractor according to claim 1, 2 or 3, wherein a reflector (38) is attached to a rearward facing surface portion of the frame cover (20). 5. The tractor according to claim 1, 2, 3 or 4, wherein a turn indicator (39) is attached to the frame cover (20).