JP4677635B2 - Grooving device - Google Patents

Description

  The present invention relates to a groove cutting device for forming a draining groove for paddy fields, a fertilizing groove, a sowing groove and the like.

  Conventionally, to form grooves for draining paddy fields, etc., a single-row self-propelled hand-operated type, or a double-row type grooving machine that is attached to the rear part of a riding management machine, rice planting machine, etc. and forms grooves after the left and right rear wheels Is used.

  The conventional two-row grooving machine is of a flip-up type in which the left and right groovers are integrally connected and move up and down simultaneously by a single lifting link, and the shape and hardness of the running ground The adaptability to changes in the amount of subsidence of the left and right wheels due to the above situation is poor, and the problem that the groove shape collapses remains.

Therefore, in order to allow grooving at a certain depth even under conditions where the amount of subsidence of the wheels changes within the same field, the vertical movement of the two groovers and the approach angle to the ground are set. Therefore, it is necessary to automatically adjust the vehicle during traveling, and various adjustment devices for the adjustment are required. These were the same in the seeding device.
Japanese Examined Patent Publication No. 4-52089

In view of the above circumstances, the present invention is based on the above-mentioned circumstances, and a pair of two groove generators move up and down independently following each other without interfering with each other while traveling. It is an object of the present invention to provide a grooving device having a simplified structure without the influence of the depth of the groove by one grooving device on the depth of the groove by the other grooving device. It is another object of the present invention to provide a grooving device that can easily and freely adjust the pressing force of the grooving device against the ground and that can be automatically maintained constant even if the situation changes during traveling.

  To achieve the above object, a pair of left and right upper parallel links each having one end pivotally supported by the traveling machine body and the other end thereof being vertically movable at the rear part of the left and right rear wheel positions of the traveling machine body, and the upper parallel link An elevating link pivotally supported between the other end portions, a pantograph link that is pivotally connected to the lower portion of the elevating link and expands and contracts in the vertical direction, and a groove generator supported by the lower portion of the pantograph link. (Claim 1).

  According to the configuration, unlike the conventional flip-up method, the pantograph link moves the left and right groove generators up and down independently of each other with respect to the ground during traveling. The approach angle is always constant, and further moves vertically up and down following the ground conditions, and automatic adjustment of the pressing force applied to the grooving device (the urging force to push into the soil) is performed. The automatic adjustment is effective even when the vehicle is tilted due to a difference in the amount of settlement of the left and right wheels of the traveling machine.

  One embodiment of the present invention is characterized in that a spring capable of adjusting a tensile force is provided between an upper end extension portion of an inner parallel link forming the pantograph link and the elevating link. (Claim 2).

  According to the embodiment, it is possible to easily and freely adjust the pressing force of the groove generator with respect to the ground. That is, if the tension of the spring is increased, the lower end of the lower parallel link forming the pantograph link is rotated toward the rear wheel, and the operation supported by the lower part of the pantograph link is performed. The pressing force of the groove is increased. Therefore, a groove having a desired depth can be formed.

  One embodiment of the present invention is characterized in that the groover is supported at the lower part of the pantograph link so as to be swingable in the left-right direction of the traveling machine body (Claim 3).

According to the above-described embodiment, the groover can easily follow the left and right rear wheels of the traveling machine body, and the grooves can be formed by erasing the marks of the left and right rear wheels.

One embodiment of the present invention is characterized in that a pair of left and right upper parallel links respectively located at the left and right rear wheel positions are attached to a single frame.

 According to one embodiment of the present invention, it is not necessary to provide an actuator for each of the grooving devices provided at the rear portions of the left and right rear wheel positions of the traveling machine body. That is, at the end of the grooving operation, at the time of movement, and at the start of the operation, both the left and right grooving devices can be lifted and lowered simultaneously by a single actuator, and the configuration can be simplified.

  According to the present invention, the pair of right and left groove forming devices move freely up and down following the change in the condition of the running ground without interfering with each other, and the approach angle of the groove forming device is always kept constant. The groove is automatically adjusted. Furthermore, it is easy and free to adjust the pressing force and the approach angle of the grooving device with respect to the ground, and therefore it is easy to adjust the depth of the groove to be formed. Further, the traces of the left and right rear wheels can be erased to form a groove, and in addition, the apparatus can be simplified.

  Hereinafter, an embodiment for carrying out the present invention will be described with reference to the accompanying drawings. 1 is a left side view of a traveling machine equipped with a grooving device according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a grooving device according to an embodiment of the present invention. FIG. 4 is an enlarged perspective view of a spring and a groove forming portion that can adjust the tensile force.

In the figure, reference numeral 1 denotes a riding four-wheeled traveling machine body equipped with a steering device 30 such as a steering handle, and the grooving device 40 of the present invention includes the rear left and right wheels 2 of the traveling machine body 2 at the rear of the position. It is mounted on a single frame 23 that is detachable from the traveling machine body 1. In the embodiment shown in the drawing, the pillars 3 and 3 are erected and fixed at the positions of the left and right rear wheels 2 and 2 of the single frame 23, respectively. A pair is supported. In addition, since the structure attached to both said support | pillars 3 and 3 is respectively the same, the structure of one is demonstrated below.

  One end portions 4a and 4a of the upper parallel links 4 and 4 are pivotally supported on the column 3, and the other end portions 4b and 4b are configured to be movable up and down. An elevating link 5 extending in the vertical direction is pivotally connected between the other end portions 4b and 4b, and an actuator 6 such as a hydraulic or electric cylinder provided between the traveling machine body 1 and one of the parallel links 4 and 4. As a result, the elevating link 5 is moved up and down.

  Next, a pantograph link 7 extending and contracting in the vertical direction is pivotally connected to the lower portion of the elevating link 5. In the embodiment of the drawings, the lower part of the elevating link 5 is formed on the inner side, that is, the outer parallel link 7a constituting the pantograph link 7 and the inner side of the bent piece part 5a bent at a predetermined angle in the direction of the left and right rear wheels 2. The upper ends 8, 8 of the parallel link 7b are pivotally supported.

  Furthermore, the upper end portion 8c of the inner parallel link 7b constituting the pantograph link 7 extends upward beyond the pivot point 8a, the upper end 7d of the extension portion 7c, and the intermediate point 5a of the lift link 5; In between, a spring 9 capable of adjusting the pulling force is provided.

  For example, as shown in FIG. 4, the tension of the spring 9 is adjusted by connecting a screw rod 10 to one end 9a of the spring 9, and providing a through hole 11 in the upper end 7d of the inner parallel link 7b. The screw rod 10 can be inserted into the through hole 11, the adjustment nut 12 can be screwed into the screw rod 10 protruding from the through hole 11, and the adjustment nut 12 can be turned and tightened.

  Next, a groover 13 is supported at the lower part of the pantograph link 7. The grooving device 13 is configured in a substantially ship shape, and in the embodiment, is supported at the lower part of the pantograph link 7 so as to swing freely in the left-right direction of the traveling machine body 1.

That is, the vertically moving link 15 is pivoted between the outer parallel link 7a constituting the pantograph link 7 and the lower end portions 14, 14 of the inner parallel link 7b so as to be parallel to the bent portion 5a of the vertical lift link 5. The vertical shaft 16 is connected downward to the downward extension 15a of the vertically moving link 15 and is fitted into the bearing portion 17 provided on the groove forming device 13 side, so that the vertical shaft 16 can fall off. There is no swing, and the head can be swung freely within a predetermined angle range in the left-right direction (for example, about 35 ° to the left and right respectively), and is detachably attached.

Furthermore, in the embodiment, the groove producing device 13 is configured such that the approach angle with respect to the ground G is adjustable. That is, as shown in FIG. 4, the bracket 19 provided on the main body side of the groover 13 is superposed on the bracket 18 fixed to the bearing portion 17 so that the brackets 18 and 19 are supported at appropriate positions in front. A shaft 20 is penetrated and held, and a plurality of adjustment holes 21 are formed in an arc shape centering on the support shaft 20 on the rear side of the main body side bracket 19. Further, although not shown, the bearing-side bracket 18 to which the plurality of adjustment holes 21 correspond is provided with one through hole. In the figure, 22 is an adjustment pin.

  In the above configuration, when the adjustment pin 22 is extracted, the main body of the groover 13 moves up and down around the support shaft 20. Thereafter, one of the plurality of adjustment holes 21 is selected, and the adjustment pin 22 is inserted into the through-hole of the bearing-side bracket 18 and fixed. The entrance angle of the groover 13 with respect to the ground G can be adjusted. Reference numeral 24 denotes a swinging fixing pin for fixing the groover 13 at a central position.

  In the above configuration, at the time of storing or moving, as shown in FIG. 3, the actuator 6 is extended, and as a result, the other end portions 4b and 4b of the upper parallel links 4 and 4 are raised, and the other end As the parts 4b and 4b rise, the pantograph link 7 is pulled up to raise the groover 13 to a position sufficiently away from the ground G in a state (horizontal state) while maintaining the working form. It has been.

  Next, at the start of groove formation, as shown in FIG. 1, the actuator 6 is contracted and the groove generator 13 is grounded. Further, the pulling force of the spring 9 is adjusted in accordance with the shape, hardness, etc. of the ground G to be grooved, and the approach angle of the groove generator 13 to the ground G is adjusted as necessary. Then, the traveling machine body 1 is caused to travel, and the groove D having a desired shape is cut.

  In the grooving operation, in the present invention, the pair of left and right groove forming devices 13 and 13 are individually operated, so that they do not interfere with each other. That is, each groover 13 moves vertically up and down following the condition of the ground G by the action of the pantograph 7. Therefore, when the situation of the ground G is different, the depth of the groove D by one groove producing device 13 does not affect the depth of the groove D by the other groove producing device 13 and the like. Grooves of uniform depth are performed under automatic adjustment while keeping the approach angle to the constant. Grooves can be made only on either the left or right side.

  For example, if the right and left elevating links 5 and 5 are connected by an appropriate means, the left and right groove forming devices 13 and 13 can be simultaneously moved up and down by a single actuator 6.

It is a left view of the traveling body which mounts the grooving device concerning one embodiment of the present invention. It is a top view of the traveling body which mounts the grooving device concerning one embodiment of the present invention. It is a left side fragmentary view which shows the accommodation state of the grooving apparatus which concerns on one embodiment of this invention. FIG. 5 is an enlarged perspective view of a spring and a groove forming unit that can adjust a pulling force.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2, 2 Left and right rear wheels 4, 4 Upper parallel link 4a, 4a (Upper parallel link) One end 4b, 4b (Upper parallel link) Other end 5 Lifting link 5a (Up / down link) Lower part 7 Pantograph Link 7b Inner parallel link (of pantograph link) 7c Upper end extension (of inner parallel link) 9 Spring 13 Groover 23 Single frame G Ground

Claims (4)

One end (4a, 4a) is pivotally supported by the traveling machine body (1) at the rear of the left and right rear wheels (2, 2) of the traveling machine body (1), and the other end part (4b, 4b) is vertically movable. A pair of left and right upper parallel links (4, 4), a lift link (5) pivotally connected between the other end portions (4b, 4b) of the upper parallel link (4, 4), and the lift It consists of a pantograph link (7) that is pivotally connected to the lower part (5a) of the link (5) and expands and contracts in the vertical direction, and a groover (13) supported by the lower part of the pantograph link (7). A grooving device. A spring (9) capable of adjusting a tensile force is provided between an upper end extension (7c) of an inner parallel link (7b) forming the pantograph link (7) and the elevating link (5). The grooving device according to claim 1. The said groove producing device (13) is supported by the lower part of the said pantograph link (7) so that a swing is possible in the left-right direction of the said traveling body (1), The Claim 1 or 2 characterized by the above-mentioned. Grooving device. The pair of left and right upper parallel links (4, 4) respectively located at the positions of the left and right rear wheels (2, 2) are attached to a single frame 23. Grooving device.

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