JPH0637606Y2 - Scraping leveling device - Google Patents

Description

[Detailed description of the device]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a rotary type scraping leveling device, and more particularly to improvement of a rake provided at a rear end portion of a leveling plate.

[Prior art]

A flattening plate mounted on the rear part of the tractor via a three-point link hitch mechanism so that it can be moved up and down, and a flat plate rotatably installed at the rear end part of the apron, with a rake provided at the rear end part so that it can rotate. A device has been proposed by the applicant. Therefore, the rake is always urged downward with respect to the flat plate.

[Problems to be solved by the device]

By the way, since the rake is biased downward, if the three-point link hitch mechanism is used to lift the substitute leveling device, the rake will be rotated at an angle larger than the vertical downward direction, and the substitute leveling operation will be performed. If you drive the tractor while descending to the field while you are doing it, the rake will rotate backwards so that it will not be damaged because the field is soft, but you will not be able to descend the rake as it is on solid ground or storage. If you do, the rake may be pressed and damaged. Also, since the rake is biased to rotate independently of the flat plate, if the biasing spring is too strong, the field surface will be pushed unnecessarily and the field surface will not be even, Furthermore, there were problems such as an increase in traction horsepower. The present invention has been made to solve the above problems.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is mounted on a rear portion of a tractor so as to be vertically movable through a three-point link hitch mechanism.
A flat plate 16 is provided at the rear end of the apron 12 so as to be vertically rotatable,
A rake 17 is provided at the rear end of the flat plate 16 so as to be vertically rotatable.
In the surrogate leveling apparatus 1 provided with the above, the upper surface side of the flat plate 16 is supported by the lower end portion of the operating rod 19 operated by the operating handle 20, and the rake 17 is provided above the rear end portion of the flat plate 16. Is pivotally supported so as to be vertically rotatable and always urged downward by a spring 23, and a downward pivot range is restricted by a stopper portion 16b provided at a rear portion of the flat plate 16. And

[Action]

With the above structure, the scraping leveling device of the present invention, when the scraping leveling device 1 is lifted by the three-point link hitch mechanism,
The downward rotation range of the rake 17 is restricted by the stopper portion 16b so that the rake 17 is not pressed against the scraping leveling device 1, and the working state of the flat plate 16 and the rake 17 is maintained. It is selected by the operation handle 20 and the operation rod 19.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the rotary allowance leveling device indicated by reference numeral 1 has a top link connecting portion 2 and a lower link connecting portion 3 at the front.
Is provided, and the connecting portions 2 and 3 are connected to the hook portion 4a of the automatic hitch hanger 4 and the joint portion, which are connected to a three-point link hitch mechanism provided at the rear portion of the tractor (not shown).
It is designed to be connected to 4b. A transmission case 5 is provided in the center of the rotary allowance leveling device 1, and an input shaft 6 projects forward from the transmission case 5. The input shaft 6 is connected to the universal joint from the PTO shaft of the tractor, Power transmission is performed via a power transmission mechanism including a transmission shaft and the like. The input shaft 6 is provided with a safety cover 7 that can be opened and closed. The power changed in the mission case 5 is transmitted to an upper part of a chain case 8 provided at an outer end of a transmission frame provided on one of the left and right sides thereof, and is provided at a lower part of the chain case 8 and the other side of the mission case 5. The rotary shaft mounted between the lower parts of the support frame is driven to rotate. A large number of scraping claws 9 are attached to the rotary shaft to form a scraping rotor, and the scraping work is performed by rotating the scraping rotor in the downcut direction. The shield rotor 10 is covered with a shield cover 10 from above, and side covers 11 are provided on both left and right sides of the shield cover 10. At the center of the rear end of the shield cover 10 in the left-right direction, the upper end of the apron 12 is rotatably supported in the vertical and horizontal directions.
Sliding rods 13 are projected laterally from both left and right ends of the upper end of 12, and both sliding rods 13 are inserted into vertical sliding holes 14 provided in the side cover 11, so that the apron 12 slides. It can be moved left and right within the range of 14. Side cover on the side of sliding hole 14
A lock plate 15 that restricts the sliding of the sliding rod 13 is provided on the shaft 11. A front end of a flat plate 16 is pivotally supported on the lower end of the apron 12 so as to be vertically rotatable, and a comb rake 17 is pivotally mounted on a rear part of the flat plate 16 so as to be vertically rotatable. There is. The apron 12 is provided with a compression rod 18,
The lower ends of the operation rods 19, 19 extending in two steps are pivotally supported on the upper surface of the flat plate 16, and the upper end of the flat rod 16 is bent in the middle to reach the front of the machine body.
The rake 16 and the comb-shaped rake 17 can be controlled between the scraping state and the soil-pulling state. An extended flat plate is rotatably provided at both left and right ends of the flat plate 16 between a use position and a non-use position, and this turning operation is performed by an operation wire provided near the operation handle 20. Is done. In addition, the side cover 11 is provided with a stand 21 that is capable of stably supporting the rotary allowance leveling device when it is placed on the ground and is rotatable between a use position and a storage position. As shown in FIG. 2 and FIG. 3, the flat plate 16 has a tip end of a support plate 22 fixed to both end portions (one not shown) pivotally supported on the rear end portion of the apron 12. The front end of the comb-shaped rake 17 is pivotally supported on the rear end of the support plate 22. The side surface of the flat plate 16 has a sand pulling step 16a in the middle and a stopper 16b at the rear end. The stopper portion 16b serves to regulate the downward rotation range of the rake 17. As shown in FIGS. 3 to 5, the comb tooth-shaped rake 17 has a pivotal support portion 17a at the front end thereof, a side surface having a V-shape, and a comb tooth portion 17b having ribs 17c. Also, rake 17
Is a flat plate 16 by means of the spring 23 shown in FIG. 6 and FIG.
It is elastically supported so as to be urged downward, and its downward rotation range is restricted by the stopper portion 16b as described above. In the rotary scraping device 1 having such a structure, the hook portion 4a of the automatic hitch hanger 4 attached to the three-point link hitch mechanism of the tractor is connected to the top link connecting portion 2 by operating the three-point link hitch mechanism. The joint portion 4b is connected to the lower link connecting portion 3 by engaging and raising the scraping leveling device 1. When the connection is complete, put the stand 21 in the stowed state and
The O-axis and the input shaft 6 are connected via a power transmission mechanism. At the time of this connection work, the safety cover 7 is lifted and fixed, and after the connection is completed, the cover is rotated by rotating horizontally. . Then, the rotary allowance leveling device 1 is lifted by the three-point link hitch mechanism, the tractor is driven and introduced into the field,
The surplus scraping leveling device 1 is lowered onto the rice field, the surrogate scraping rotor is rotationally driven to drive the tractor, and the surplus scraping leveling device 1 is towed to perform the scraping work. When performing scraping work, the operating rods 19 and 19 are in a state of freely moving in the front-rear direction, and the apron 12, the flat plate 16, and the rake 17 freely move up and down, and also move left and right. The field surface scraped by the scraping rotor is leveled. When soil scraping is occurring in the field due to scratching work, it is necessary to move the soil and level it. At this time, the operation handle 20 is operated from the tractor side to operate the operation rod 1.
Move 9,19 downward, apron 12, flat plate 16, rake
Fix 17 while pushing it down. Further, the sliding rod 13 is fixed by the lock plate 15 and the apron 12 (flat plate 1
6. Prevent the rake 17) from turning left and right. By working in this state, the soil in the high part can be moved to the low part to make the entire field almost even. Note that the apron 12 has the sliding rod 13 unlocked by the lock plate 15 when performing the scraping work, and the working device main body does not work even when the scraping leveling device 1 main body tilts to the left or right together with the tractor. An apron regardless of the slope of 1
12, leveling plate 16 and rake 17 are in horizontal contact with the field to perform leveling work. When the rotary allowance leveling device 1 is lifted by the three-point link hitch mechanism, the comb tooth rake 17 is biased downward by the spring 23, but the rotation range thereof is restricted by the stopper portion 16b. Therefore, the rake 17 is not rotated to the vertically downward position. Therefore, when the rotary scraping leveling device 1 is lowered to the field scene during the scraping work, the rake 17 moves with the forward movement of the tractor. The rake 17 will not be damaged even if it is placed in a leveling posture and the skimming leveling device 1 is dropped onto a road or a place where the surface of the storage is hard.

[Effect of device]

As described above, according to the surrogate leveling device of the present invention, the flat plate 16 is operated by the operation handle 20.
The upper surface side is supported by the lower end portion of 19, and the rake 17 is pivotally supported above the rear end portion of the flat plate 16 such that the rake 17 can be rotated up and down and is constantly urged downward by a spring 23.
Since the downward rotation range is restricted by the stopper portion 16b provided at the rear portion of the flat plate 16, the rake 17 is moved vertically by the action of the spring 23 along the field scene to perform the flattening work, and the three-point link hitch. When you lift the scraping leveling device 1 through the mechanism,
Since the rake 17 rotates downward only within the range regulated by the stopper portion 16b, the rake 17 will not be damaged even if the surrogate leveling device 1 is dropped to a place where the surface is hard. Further, the flat plate 16 and the rake 17 can be operated by the operation handle 20 and the operation rod 19 and can be selected between a flat state and a soiled state.

[Brief description of drawings]

FIG. 1 is a side view of an entire rotary allowance leveling device showing an embodiment of the present invention, FIG. 2 is a plan view of a flat plate, FIG. 3 is its side view, and FIG. 4 is a plan view of a rake. FIG. 5 is a side view of the same,
FIG. 6 is a plan view of a spring used for a rake, and FIG. 7 is a side view of the same. 1 ... Rotary allowance leveling device, 2 ... Top link connecting shaft, 3 ... Lower link connecting shaft, 4 ... Auto hitch hanger, 4a ... Hook part, 4b ... Joint part, 5 ... Mission case , 6 ... Input shaft, 7 ... Safety cover, 8
...... Chain case, 9 …… Scratch claw, 10 …… Shield cover, 11 …… Side cover, 12 …… Apron, 13 …… Sliding rod, 14 …… Sliding hole, 15 …… Lock plate, 16 …… Solid flat plate, 16a …… Grounding part, 16b …… Stopper part, 17 …… Comb tooth rake, 17a …… Pivot part, 17b …… Comb tooth part, 17c …… Rib, 18 …… Compression rod, 19 ...... Operation rod, 20 ...... Operation handle, 21 ...... Stand, 22 ...... Support plate, 23 ...... Spring.

Claims (1)

[Scope of utility model registration request] 1. A rear part of a tractor is mounted so as to be able to move up and down via a three-point link hitch mechanism, and a flat plate (16) is provided at a rear end part of an apron (12) so as to be vertically rotatable. ) Further includes a rake (17) provided at the rear end of the rake (17) so that the rake (17) can be turned up and down, the flattening plate (16) is operated by an operation handle (20). The upper surface side is supported by the lower end portion of 19), and the rake (17) is vertically rotatable above the rear end portion of the flat plate (16) and is constantly urged downward by a spring (23). In addition to the above-mentioned pivotal support, the downward scraping leveling device is restricted by a stopper part (16b) provided at the rear part of the flat plate (16).