JPH098A - Field working machine - Google Patents

Abstract

PURPOSE: To provide a field working machine equipped with a mechanism capable of reducing the load when releasing a holding mechanism, simplified in structure, improved in operability and workability, useful for e.g. carrying works. CONSTITUTION: A mounting frame 3 is linked to a tractor 1 and mounted with a carrying platform 13 in a backwardly tiltable way, a releasable holding mechanism 21 is equipped in between the mounting frame 3 and the carrying platform 13, and also a mechanism 22 capable of reducing the load when releasing the holding mechanism 21 is provided. It is preferable that the frame 3 be mounted with a plow 9 so as to be pullable and also holdable in a forwardly lowering fashion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field work machine used for transportation work, leveling work in a field scene, and the like.

[0002]

2. Description of the Related Art As a conventional field working machine of this type, Japanese Patent Publication No.
No. 9-3607, Japanese Utility Model Publication No. 61-45245,
JP-B-56-55327, JP-B-63-2096
Documents such as Japanese Patent No. 9 are known.

In this conventional structure, a mounting frame is connected to the tractor, a carrier is provided on the mounting frame so as to be tiltable rearward, and a releasable locking mechanism is provided between the mounting frame and the carrier. ,
The plow body is attached to the mounting frame in a front-down manner.

Therefore, for example, a harvesting machine or an agricultural work machine is mounted on a carrier for carrying work, or the plow body is held in a forward-downward direction to move the tractor forward, so that the soil in a high place in a field scene can be traveled. The tractor is scraped off, and the scraped soil is guided by the plowed body into the transport base, the tractor is moved to a low place in the field, and the worker artificially releases the locking mechanism at that position, The soil is tilted rearward by its own weight, and the soil in the carrier is discharged to a low place in the field so that the land can be grounded.

[0005]

However, in the case of the above-described conventional structure, when the carrier is tilted, a large release load is required when releasing the locking mechanism, so that an excessive force is applied to the manual operation. It may be difficult to operate, and if an automatic release structure is used, an actuator that generates a large force or torque must be used, which increases the size of the locking mechanism and increases the cost. It has the inconvenience that

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate these disadvantages. The gist of the present invention is to connect a mounting frame to a tractor and to mount a carrier on the mounting frame so as to be tiltable rearward. And a release mechanism provided between the mounting frame and the carrier, wherein a load reduction mechanism capable of reducing a load when the release mechanism is released is provided. It is in a field work machine.

At this time, a plow body can be held in the mounting frame in a front-down manner and can be lifted up.

[0008]

When the carrier is tilted, the load reducing mechanism reduces the load when the locking mechanism is released.

Further, the plow body is provided on the mounting frame so that it can be held in a front-down shape and can be pulled up.

[0010]

1 to 7 show an embodiment of the present invention.
5 to FIG. 5 show the first embodiment, FIG. 6 shows the second embodiment, and FIG. 3 shows the third embodiment.

In the first embodiment shown in FIGS. 1 to 5, 1 is a tractor, and a mounting frame 3 is connected to a rear portion of the tractor 1 by a connecting mechanism 2.

The connecting mechanism 2 includes a lower link 4 projecting from lower left and right side portions of the tractor, a swing arm 5 projecting from upper left and right side portions of the tractor, a swing arm 5 and a middle portion of the lower link 4. It is composed of a lifting link 6 for connecting the parts and an upper link 7 protruding from the upper part of the tractor. The tip of the lower link 4 and the tip of the upper link 7 are attached to the mounting frame 3 by a connecting pin 8. It is configured so that it can be moved up and down by a swing arm 5 that is connected and swings the mounting frame 3 by hydraulic pressure.

Reference numeral 9 is a plow body, and the mounting frame 3 is seen from a side view L.
Formed into a square frame shape in a rear view, the plow body 9 is attached between the left and right vertical rods 3a of the mounting frame 3 by the support shaft 10 in a front-down manner, and the stopper portion 11 is formed on the back surface of the plow body 9. The stopper body 12 is provided on the lower surface of the horizontal rod 3b of the mounting frame 3,
While holding the plow body 9 in the front lowering state, the plow body 9 is centered on the support shaft 10 by a pulling and retracting mechanism (not shown).
Is configured so that it can be pulled up and rotated.

Reference numeral 13 denotes a carrier. The carrier 13 is formed by vertically arranging left and right side plates 15, a front plate 16, and a rear plate 17 on four sides of a rectangular bottom plate 14, and the front plate 16 has a plowed body 9. The soil inlet portion 18 is formed at a position facing the.

Further, a reinforcing rod 19 is attached to the bottom plate 14 of the carrier 13, the rear portion of the horizontal rod 3b is pivotally attached to the reinforcing rod 19 by a fulcrum shaft 20, and the carrier 13 is attached so as to be tiltable rearward about the fulcrum shaft 20. ing.

Reference numeral 21 is a locking mechanism, and 22 is a load reducing mechanism. In this case, a horizontal rod 13b is attached between the upper portions of the vertical rods 13a of the carrier 13 and the support piece 2 is provided at the center of the horizontal rod 13b.
Two pieces 3 are attached in parallel, and the support pin 2 is provided between the support pieces 23.
4, the base end of the hooking bar 25 is pivotally attached to the support pin 24, and the stopper pin 26 capable of contacting the middle part of the hooking bar 25 is attached to the horizontal bar 3c installed between the vertical bars 3b. A hooking spring 27 formed of a torsion spring capable of being elastically biased in the direction of abutting the hooking bar 25 with the stopper pin 26 is hooked between the hooking bar 24 and the support piece 23, and one mounting frame is formed. Yoko rod 3 of 3
An actuator 28 composed of an electromagnetic solenoid on the side surface of c
And two supporting plates 29 are arranged side by side on the horizontal rod 3c, a rotating shaft 31 is rotatably mounted on the supporting plate 29 by a bearing portion 30, and the rotating shaft 31 has a plurality of claws 32a. Large diameter ratchet 32
And a step wheel 34 integrally formed with a small diameter locking wheel 33 having a plurality of locking projections 33a.
Is formed with an engaging recess 25a capable of engaging with the engaging projection 33a of the small diameter engaging wheel 33, the bracket 35 is attached to the upper surface of the horizontal rod 3c, and the claw arm 36 is pivotally attached to the bracket 35 by a pin 37. , The large diameter ratchet 32 on the claw arm 36.
Of the actuator 28 is formed on the claw arm 36 by forming a locking step 36a capable of locking the claw 32a.
3, a spring member (not shown) in which a plunger 28a of the actuator 28 is built-in is constantly biased in the protruding direction as shown in FIG. 3 and the plunger 28a is retracted and retracted as shown in FIG. 5 when excited.

However, when the actuator 28 is not excited, as shown in FIG. 3, the plunger 28a is forcibly projected by a spring member (not shown) so that the locking step 36a of the claw arm 36 is claw 32a of the large-diameter claw wheel 32. The rotation of the step wheel 34 is prevented by this, and therefore the small diameter locking wheel 3
The locking projection 32a of 2 and the occlusal recessed portion 25a of the hooking bar 25 maintain the occlusal state to prevent the hooking bar 25 from being pulled out and tilting backward of the carriage 13 about its fulcrum shaft 20. When the actuator 28 is excited when the locking mechanism 21 is released, as shown in FIG. 5, the claw arm 36 swings downward around the pin 37, and the locking step portion 36a of the claw arm 36 has a large diameter claw. It is disengaged from the claw 32a of the wheel 32, whereby the rotation of the step wheel 34 is allowed, so that the locking projection 32a of the small diameter locking wheel 32 and the engagement recess 25a of the hooking bar 25 are formed.
The engagement with the hook is released, and the hook 25 can be pulled out. As a result, the carriage 13 tilts backward by its own weight around the fulcrum shaft 20, and the actuator 28 is deenergized in the tilted state. Plunger 28a
Is forcibly protruded by a spring member (not shown) so that the pawl arm 36
The claw 32a of the large-diameter ratchet wheel 32 is locked and placed on the locking step portion 36a, and when the carriage 13 is erected from the tilted state, the hook bar 25 has a smaller diameter than the step wheel 34. Locking wheel 32
Of the small diameter locking wheel 32 and the engaging recess 2 of the hooking bar 25 by slidingly contacting the locking projection 32a of
5a is brought into an occlusal state, whereby the hooking bar 25 is prevented from being pulled out, and backward tilting of the carriage 13 around its fulcrum shaft 20 is prevented.

Since the first embodiment is constructed as described above, the harvest 13 and the agricultural working machine are mounted on the carrier 13, and the locking mechanism 21 is released to tilt the carrier 13 backward when necessary. Various transport and discharge work can be performed, and the plow body 9
When the tractor 1 travels forward while holding the sloping ground forward, the soil at a high place in the field is scraped off by the plow body 9, and the scraped soil is introduced and guided by the plow body 9 into the carriage 13. 1 is moved to a low place in the field, the locking mechanism 21 is released, the carrier 13 is tilted rearward by its own weight, and the soil in the carrier 13 is discharged to a low place in the field, thereby leveling the field. Will do the work.

When the locking mechanism 21 is released, the load reducing mechanism 22 including the step wheel 34, the hook 25, and the claw arm 36 causes the engagement radius of the large diameter claw wheel 32 and the small diameter locking wheel 33 in this case. Due to the presence of the difference, the load on the actuator 28 due to the disengagement of the locking step portion 36 of the claw arm 36 and the locking projection 32a of the large-diameter claw wheel 32 is reduced, and the release load is reduced correspondingly to enable a smooth release operation. In addition, the actuator 28 having a small retracting ability of the plunger 28a can be used, and the manufacturing cost and the size can be reduced accordingly.

The second embodiment of FIG. 6 shows another structure of the locking mechanism 21, in which the bracket 3 is attached to the side surface of the horizontal rod 3c.
8, the pawl plunger 40 is slidably mounted on the bracket 38, and the upper end of the pawl plunger 40 is formed on the pawl 32a of the large-diameter pawl wheel 32 of the step wheel 34 so as to be able to be pulled out and locked. The spring 40 for use is interposed between the bracket 38 and the claw plunger 40, the pulling wire 41 is connected to the claw plunger 40, and the pipe body 42 covering the pulling wire 41 is attached to the bracket 38, and the proximal end portion of the pulling wire 41 is attached. Is installed around the driver's seat.

Also in the second embodiment, the same action and effect as those of the first embodiment can be obtained, and the release attractive force of the pulling wire 41, that is, the release load can be reduced, and the release operation can be smoothly performed. .

The third embodiment of FIG. 7 also shows another structure of the locking mechanism 21. In this case, an actuator 28 composed of an electromagnetic solenoid is attached to the side surface of the horizontal rod 3c, and the plunger 2 is attached.
A pawl rod 43 is attached to 8a, and an upper end portion of the pawl rod 43 is formed so as to be able to be engaged and disengaged with the pawl 32a of the large diameter pawl wheel 32 of the step wheel 34.

Also in this third embodiment, it is possible to obtain the same effect as that of the first embodiment.

The present invention is not limited to the above-described embodiment, but the structures of the locking mechanism 21 and the load reducing mechanism 22 are appropriately modified and designed. Instead of the step wheel 34, it is also possible to adopt a link structure and a structure using a cam mechanism and a gear mechanism.

[0025]

As described above, according to the present invention, when the locking mechanism is released, the release load can be reduced by the load reducing mechanism, and in the case of artificial release, the release force can be reduced and the operability is improved. In addition, an actuator that generates a small force or torque can be used for the automatic release, and thus the overall size of the locking mechanism and the cost can be reduced.

Further, by providing the plow body on the attachment frame so that it can be held in the front-down shape and can be pulled up freely, it is possible to perform the land leveling work in the field in addition to the carrying work by the carrier.
At this time, the tilting operation of the carrier can be smoothly performed by the load reducing mechanism, and the work efficiency can be improved accordingly.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is an overall side view of a first embodiment of the present invention.

FIG. 2 is a partially enlarged side view of the first embodiment of the present invention.

FIG. 3 is a partial side sectional view of the first embodiment of the present invention.

FIG. 4 is a partial plan view of the first embodiment of the present invention.

FIG. 5 is a partial side sectional view of the first embodiment of the present invention.

FIG. 6 is a partial side sectional view of a second embodiment of the present invention.

FIG. 7 is a partial side sectional view of a third embodiment of the present invention.

[Explanation of symbols]

 1 tractor 3 mounting frame 13 carrier 21 locking mechanism 22 load reduction mechanism

Claims (2)

[Claims] 1. A mounting frame connected to a tractor, a mounting table provided on the mounting frame so as to be tiltable rearward, and a releasable locking mechanism provided between the mounting frame and the mounting table. A field work machine comprising a load reducing mechanism capable of reducing a load when releasing the locking mechanism. 2. A field working machine in which a plow body can be held in the mounting frame in a front-down shape and can be lifted up.