JP5022263B2 - Weed loss reduction device in tedder - Google Patents

Description

  The present invention relates to a trajectory of a tine attached to a rotor that is supported so as to be swiveled on a frame with a vertical axis of rotation when performing a grass collecting operation with a gyro-type tedder, and a front of a grass collecting frame to be supported on the frame. The present invention relates to a grass loss reduction device in a tedder for reducing a space loss formed between an edge and a grass loss that comes out of a space formed between a bottom surface of a grass collection frame and the ground. .

  More specifically, the gyro-type tedder is a towed and biaxial gyro-type tedder, as shown in the plan view of FIG. 1 and the side view of FIG. The rear end side of the beam 11 extending forward is connected to the main body portion 10 formed in the above-described structure, and a mount 12 is provided on the front end side of the beam 11, and the mount 12 is connected to the tractor T via the three-point link hitch h. By connecting to the coupler provided on the rear side of the vehicle body, the main body 10 is connected to the tractor T, and the main body 10 is provided with hollow frames 13 and 13 projecting left and right. A plurality of tine support arms projecting in the radial direction are attached to the periphery of the rotor a on the lower surface side of each free end of the projecting frames 13 and 13, respectively, by rotating the rotor a rotated by the longitudinal rotating shaft 14. 15, the tines b are respectively attached to the projecting end portions of the tine support arms 15, and the rotating shaft 14 of the rotor a is conductively stored in the main body portion 10 through the conductive shafts stored in the left and right extending frames 13. The input shaft 16 conducted to the mechanism and supported by the main body 10 is conducted to the PTO shaft of the tractor T through the universal joint shaft 17, and the rotational power is input from the PTO shaft. Thus, the rotor a is rotated so that the tine b attached to the tip of the support arm 15 provided at the periphery rotates with a rotation locus w indicated by a chain line in FIG.

  And, on the lower surface side of each rotor a, a wheel 18 configured as a free wheel is respectively supported, and in a portion close to the projecting end side of the frames 13 and 13 projecting from the main body 10 to the left and right, it is directed rearward. The projecting end portions of the connecting rods 21 are provided on the projecting end portions of the mounting arm 19 so as to project forward from the upper end side of the frame column 20 of the grass collecting frame c. The tedder 1 is configured by connecting the grass collecting frame c to the frames 13 and 13 so as to be pivotable up and down via the connecting shaft P, thereby driving the rotor a and turning the tine b. The grass that has been mowed and dried by tractor T while being swung is scraped into the space between the pair of opposing grass collecting frames c by a tine b provided on the rotating rotor a. , That So that gradually formed in the window row (Atsumarikusaretsu) having a width which is restricted by the pair of current grass frame c.

  This gyro-type tedder 1 is connected to a mounting arm 19 projecting rearward from the frame 13 with a connecting rod 21 provided on the frame pillar 20 of the grass collection frame c, so that the grass collection frame c is attached to the frame 13. At the time of attachment, the connecting rod 21 is provided in a state of being fixed to the frame column 20 of the grass collecting frame c, and the connecting rod 21 is freely rotated up and down around the connecting axis P with respect to the mounting arm 19. As shown in FIG. 3, the frame 13 of the tedder 1 is moved up and down by the raising and lowering movement of the grass collecting frame c that is connected to the connection shaft P of the connection rod 21. With reference to a state position where the bottom surface of the wheel 18 provided on the lower surface of the wheel and the bottom surface of the grass collecting frame c occupy the same height position, the connecting rod 21 is prevented from turning downward from the state position. The movement is restricted, and in this state , Between the front side and the tine b trailing edge side of the turning locus w of the frame pillars 20 of Atsumarikusawaku c, so that the interval distance D of about 5 to 10 millimeters is formed.

  In this gyro-type tedder, if the field where the grass is cut down is flat with no unevenness, it can be done with almost no loss in collecting grass on the windrow, but the In some cases, there is a problem that a lot of grass loss occurs.

  As shown in FIG. 4, when the height of the raised convex ground is about 100 mm above the ground surface GL as shown in FIG. 4, the wheels 18 of the tedder 1 are placed on the ground surface GL. When the grass collecting frame c is located at a convex position at the level position, the grass collecting frame c is pushed up about 100 mm, which is the height of the raised portion of the ground, and obliquely rearward and upward with respect to the frame 13 of the tedder The interval formed between the front surface of the grass collection frame c and the turning locus w of the tine b pivoted and supported by the frame 13 approximately corresponds to the height of the ground uplift. The grass that spreads to about 80 mm and is scraped backward by the turning tine b jumps out from this interval, and is released to the side of the grass collection row to be formed, resulting in grass collection loss.

  Further, as shown in FIG. 5, when the wheel 18 of the tedder 1 rides on the raised convex ground and the grass collecting frame c occupies the position of the flat ground surface GL, the lowering operation is performed. The grass collecting frame c, which is regulated so that the bottom surface is aligned with the height position of the bottom surface of the wheel 18 of the tedder 1, is approximately 100 mm above the height of the raised ground on which the wheel 18 rides. By floating from the surface GL, an interval of about 100 mm is formed between the bottom surface of the grass collecting frame c and the ground, and the grass scraped backward by the turning tine b jumps out from the interval to the side. It becomes grass loss.

  The problem to be solved in the present invention is to run a gyro-type tedder and collect grass that has been cut down and dried by the field in a field with unevenness in the field scene. When the work is performed, the distance between the trailing edge portion of the tine's rotation trajectory and the front edge portion of the grass collection frame is obtained by the grass collection frame climbing on the raised portion of the ground and rotating upward with respect to the frame. Is expanded, and the grass jumps out from this expanded interval, and the grass collecting frame is located in the concave portion of the ground and floats up from the ground. The grass jumps out from the coming interval, which makes the grass collection work inefficient. When the grass collection frame moves up and down with respect to the frame due to unevenness in the field scene, The distance between them is kept constant, and the distance between the grass frame and the ground surface Occurs not way, good grass collection work efficiency is to provide a method to ensure that takes place.

In the present invention, as a means for solving the above-mentioned problems, the front end side of the connecting rod 21 whose longitudinal direction is the front-rear direction is attached to the attachment arm 19 provided to protrude rearward from the frame 13 of the tedder 1. ), And the end of the connecting rod 21 that rotates up and down about the connecting shaft P is rotated up and down via the connecting shaft S1 to the upper end of the frame column 20 of the grass collecting frame c. The control link 3 that is movably connected and is formed above the connecting rod 21 so as to be shorter than the connecting rod 21 is arranged so as to be substantially parallel to the connecting rod 21, and the rear end side of the control link 3 is arranged on the rear side. , via a connecting shaft S3 provided at the upper end of the frame pillars 20 coordinated above the connecting shaft S1 for connecting the connecting rod 21 to the frame pillars 20, against the frame pillars 20, the upper and lower rotatably coupled and, setting the front end of the control link 3, the mounting arm 19 to rotatably supporting the connecting rod 21 Coupling shaft being displaced rearward than P connected to the connecting shaft S2 provided in the mounting arm 19 that, in the mounting arm 19, state position where the connecting rod 21 is substantially in the horizontal or posture slightly downwardly inclined The present invention proposes a grassing loss reducing device in a tedder, which is provided with a restricting member K1 for preventing a downward rotation around the connecting shaft P.
At the same time, in the grass loss reduction device in the above-mentioned tedder, the connecting shaft P that pivotally supports the connecting rod 21 up and down on the mounting arm 19 is connected to the left and right side walls of the mounting arm 19. A connecting shaft S2 that is disposed on the outer surface side and pivotally supports the control link 3 so as to be pivotable up and down is disposed on the outer surface side of the left and right side walls of the mounting arm 19, so that the connecting rod 21 and the control link 3 are disposed. Proposes a grass loss reduction device in a tedder characterized by rotating in separate spaces in plan view.

  The means of the present invention is formed between the grass collecting frame and the turning trajectory of the tine supported on the frame of the tedder when the grass collecting frame moves up and down with respect to the frame of the tedder due to unevenness of the field scene in the grass collecting work by the tedder. The distance between the bottom of the grass collection frame and the field scene is lowered until the bottom of the grass collection frame comes into contact with the field scene. Since no gap is formed between them, the grass collection work can be performed with high accuracy without any loss of grass collection.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  6 and 7 are a side view and a plan view of a single state of grass removal work removed from a tractor of a tedder embodying the present invention, and FIG. 8 is a side view of a state in which the grass collection frame of the tedder is stored. 9, FIG. 10 and FIG. 11 are an enlarged side view, plan view and rear view of the main part of the tedder. In these drawings, 1 is a tedder, and a is a left and right projecting from the main part 10 of the tedder 1 to the left and right. A rotor provided on the lower surface side of the frame 13, b represents a tine provided on the rotor a, and c represents a grass collection frame attached to the attachment arm 19 of the grass collection frame provided on the rear surface side of the frame 13 of the tedder 1.

  In this example, the tedder 1 is connected to a towing vehicle such as a tractor T (see FIGS. 1 and 2) and travels by being towed, and two tines b turning by a rotor a are connected in series. It is made on a two-axis gyro-type tedder to be equipped with.

  The tedder 1 has a main body portion 10 of the fuselage formed in the shape of a machine housing for storing the transmission mechanism, and a base end portion of a beam 11 extending forward is integrally connected to the front side thereof. 11 is provided with a mount 12 for connecting to a coupler provided on the rear side of the vehicle body of a tractor (not shown) via a three-point link hitch.

  Hollow frames 13 projecting in the left-right direction are connected to the left and right side surfaces of the main body portion 10 formed in the machine casing, and the lower surface side of each projecting end portion of the left and right frames 13 is arranged in the vertical direction. The rotors a rotated by the rotary shaft 14 are respectively supported, and a plurality of tine support arms 15 projecting in the radial direction are provided on the circumferential surfaces of the rotors a at equal positions in the circumferential direction. The tine b is attached to the projecting end of the arm 15, respectively.

  The rotor a conducts with a conduction mechanism stored in the main body 10 of the machine casing through a conduction shaft whose rotation shaft 14 is stored in the hollow left and right extending frames 13. The input shaft 16 provided so as to project forward from the main body portion 10 is conducted, and the input shaft 16 is conducted to the PTO shaft of the tractor via the universal joint shaft 17 to transmit the rotational power from the tractor side. As a result, it turns around the rotation axis 14.

  A bracket 180 is provided on each lower surface side of the rotor a so as to freely pivot about the axis of the rotary shaft 14, and a wheel 18 configured as a free wheel is supported on the bracket 180.

  In addition, mounting arms 19 projecting toward the rear of the rotor a are provided at portions of the left and right frames 13 and 13 projecting from the main body 10 to the left and right, respectively, and projecting toward the rear of the rotor a. Each c is attached.

  The grass collecting frame c is attached to the mounting arm 19 provided on the frame 13 of the tedder 1 so as to protrude forward from the upper end portion of the frame column 20 of the grass collecting frame c as shown in FIGS. The connecting rod 21 provided on the connecting rod 21 is connected to the mounting arm 19 fixedly supported on the frame 13 of the tedder 1 by the connecting shaft P so as to freely rotate up and down. The grass collecting frame c is moved up and down with respect to the frame 13 of the tedder 1 by turning up and down around the center, and the connecting rod 21 is substantially horizontal in the turning range around the connecting shaft P of the connecting rod 21. So as to prevent the downward rotation after reaching the correct posture, and the restricting member K1 provided on the mounting arm 19 and the rearward rotation beyond the connecting shaft P when rotated upward. A regulating member provided on the mounting arm 19 As shown in FIG. 8, the grass collecting frame c attached and supported by the connecting rod 21 by the rotation of the connecting rod 21 around the connecting shaft P is stored on the upper surface side of the frame 13 of the tedder 1. As shown in FIG. 1 and FIG. 2, it is possible to switch between the state of being suspended and the state of being suspended from the mounting arm 19 provided on the frame 13 at a predetermined height as shown in FIG. It is the same as the attachment means of the conventional tedder collecting frame shown.

  However, in the means of the present invention, the end of the connecting rod 21 that is connected to the frame column 20 of the grass collecting frame c is also a rotatable connection by the connecting shaft S1, so that the connecting rod 21 can be connected. In each of the state of the state in which the frame is pivoted upward about the connection axis P and the state in which it is pivoted downward, the grass collection frame c is freely pivoted about the connection axis S1 with respect to the coupling rod 21 to connect the grass collection frame c. The posture with respect to the heel 21 is changed.

  Then, between the upper end of the frame column 20 of the grass collecting frame c and the mounting arm 19, the control link 3 disposed above the connecting rod 21 so as to be substantially parallel to the connecting rod 21 is connected over the bridge. Thus, the posture of the grass collecting frame c connected to the connecting rod 21 with respect to the connecting rod 21 is controlled by the control link 3.

  As shown in FIG. 9, the control link 3 provided in parallel with the connecting rod 21 extends the mounting arm 19 upward on the upper surface side of the protruding end side of the mounting arm 19 fixedly attached to the frame 13. A mounting bracket 19a is installed and fixed integrally. The front end of the control link 3 is pivotally connected to the mounting bracket 19a so as to freely rotate up and down by a connecting shaft S2. By connecting the rear end side of the control link 3 to the part of the grass collecting frame c that is close to the upper end of the frame column 20 via the connecting shaft S3 so as to be pivotable up and down, the above-mentioned in the side view is described above. It is installed between the mounting arm 19 and the frame column 20 of the grass collection frame c so as to be positioned above the connecting rod 21 and in parallel with the connecting rod 21 in the vertical direction.

  The length of the control link 3 is set to be shorter than the length of the connecting rod 21, and the support position of the connecting shaft S2 for connecting the control link 3 to the mounting arm 19 is as follows. In addition, it is set at a position closer to the protruding end side of the mounting arm 19 than the support position of the connecting shaft P provided on the mounting arm 19 so as to support the connecting rod 21.

  In this example, the length of the control link 3 from the center of the connecting shaft S2 connected to the mounting arm 19 to the center of the connecting shaft S3 connected to the frame column 20 of the grass collecting frame c is the length of the connecting rod 21. The length from the center of the connecting shaft P to the connecting shaft S1 is set to be slightly less than 20%, and in order to connect the control link 3 to the mounting arm 19, the mounting arm 19 is extended. The connecting shaft S <b> 2 provided at the protruding end of the provided mounting bracket 19 a is protruded from the support position of the connecting shaft P that connects the connecting rod 21 to the mounting arm 19 by a dimension shorter than the connecting rod 21. The position is set to the direction.

  In addition, when the control link 3 is pivotally supported by the mounting arm 19 so as to be vertically movable up and down via the connecting shaft S2, as shown in FIGS. 9, 10, and 11, the upper surface of the mounting arm 19 is provided. The connecting shaft S2 is disposed at a position protruding from the outer surface of one of the left and right side walls of the mounting bracket 19a on the tip side of the mounting bracket 19a provided so as to protrude in a square shape toward the rear upper side. The control link 3 is rotated around the connecting shaft S2 at a position outside the left and right side walls of the mounting bracket 19a. As shown in FIG. 10, the connecting shaft P for connecting the connecting rod 21 to the mounting arm 19 is an attachment of the mounting arm 19 where the connecting rod 21 provided on the mounting bracket 19a is located in plan view. As shown in FIG. 11, the connecting rod 21 and the control link 3 are disposed on the outer surface side of the other side wall of the mounting bracket 19a located on the opposite side to the outer surface of the side wall of the bracket 19a. In view, they are located apart from each other on the left and right, and rotate in different space zones without interfering with each other.

  In this embodiment, the control link 3 provided as described above is centered on the connecting shaft S3 provided on the upper end side of the frame column 20 of the collecting frame c and the rotation about the connecting shaft S2 provided on the mounting bracket 19a. There is no restriction on any rotation, and any rotation can be performed freely. However, the rotation range of the control link 3 and the connecting rod 21 constitute a link mechanism. Restricted to the range of rotation.

  As shown in FIG. 12, the downward rotation of the control link 3 around the connecting shaft S2 is prevented by the connecting rod 21 being brought into contact with the restricting member K1, and the link mechanism is fixed. In that state position, it is blocked.

  As shown in FIG. 6, the upward rotation of the grass collecting frame c supported by the link mechanism is rotated together with the connecting rod 21 from the state position described above, and the grass collecting frame c is further raised. As a result, the connecting rod 21 rotates rearward across the connecting shaft P as shown in FIG. 8 and abuts against the restricting member K2 to prevent the rearward rotation and to fix the link mechanism. Stopped by stopping. As a result, the connecting rod 21 is rotated between the state position where the connecting rod 21 is restricted by the restricting member K1 and the state position where the connecting rod 21 is restricted by the restricting member K2.

  The grass collecting frame c includes a connecting link composed of the connecting rod 21, the control link 3, a connecting shaft P provided on the mounting arm 19 so as to pivotally support the front end sides of these two links, and a mounting bracket. The connecting shaft S2 provided on 19a, a sheathed cylindrical mounting cylinder 200 fitted to the upper end of the frame column 20 of the grass collecting frame c, and the rear end sides of the two front links are attached to the mounting cylinder 200. It is supported via a link mechanism L composed of a connecting shaft S1 and a connecting shaft S3 provided to support the shaft.

  The frame column 20 of the grass collecting frame c is inserted into the mounting cylinder 200 constituting the link mechanism L described above, and the upper end thereof is connected by fastening with the screw 201. The connection is connected to the mounting cylinder 200. On the other hand, in a state in which the frame column 20 freely rotates around the axis line, a locking plate 202 is provided in a shelf shape at a portion close to the lower end side of the mounting tube 200, and the mounting tube is placed on the locking plate 202. A mounting cylinder 200 is provided by a locking mechanism M including a sliding plate 203 that is rotatably mounted at the center 200 and a locking pin 204 that is removably inserted into the sliding plate 203 and the locking plate 202. When the sliding plate 203 that is engaged with the peripheral surface of the frame column 20 fitted therein is rotated to a desired rotational angle position, the locking pin 204 is moved to the sliding plate 203 and the locking plate 202. The rotation is locked by inserting it into the engagement hole Connecting the upper end portions of the frame posts 20 for mounting cylinder 200 is so as to complete by the.

  As described above, the grass collecting frame c that is supported by fitting the upper end portion of the frame column 20 to the mounting cylinder 200 constituting the member of the link mechanism L is the lower limit of the downward rotation of the link mechanism L. Is in the most lowered state with respect to the frame 13 at the position where it contacts the restricting member K1.

  At this time, the upper and lower height positions are set so that the sled-like portion 20a at the lower end of the frame column 20 occupies a position lower than the bottom surface of the wheel 18 pivotally supported on the frame 13, as shown in FIG. is there. In the state shown in FIG. 12, the wheel 18 is located in the flat area of the farm field, the grass collecting frame c is located in the low area of the farm scene and falls there, and the sled 20a is located at the bottom of the low area. It is in a grounded state.

  The unevenness generated in the field scene is the lowest in a normal field, and is a subsidence depth that is about 10 cm below the ground surface GL. The limit of the lowering operation of c is set at a position lowering about 10 cm from the bottom surface of the wheel 18. That is, as shown in FIG. 12 described above, when the connecting rod 21 comes into contact with the restricting member K1 and the downward rotation is prevented, the sled-like portion 20a at the lower end of the frame column 20 of the grass collecting frame c. Is lowered to a position about 10 cm lower than the bottom surface of the wheel 18.

  FIG. 6 shows a state in which the wheel 18 of the tedder 1 and the sled-like portion 20a at the lower end of the frame column 20 of the grass collection frame c are both located on a flat ground portion of the farm scene, and in this case, contact with the ground surface GL. When the grass collecting frame c is pushed up by the sled-like portion 20a, the link mechanism L is rotated upward, the connecting rod 21 is lifted and rotated away from the regulating member K1, and is freely rotated up and down. The grass collecting frame c that can be supported by the link mechanism L is in a state of being supported on the ground surface GL by a sled-like portion 20a whose weight is grounded.

  FIG. 13 shows a state in which the wheels 18 of the tedder 1 are located on a flat part of the farm scene, and the grass collecting frame c is located on a raised part of the farm scene. The height of the raised portion is about 10 centimeters from the ground surface GL in the normal field, and the height of the raised portion is about 10 centimeters. The sled-like portion 20a of the frame column 20 of the grass collection frame c is at a position elevated about 10 cm from the bottom surface of the wheel 18. And the connection rod 21 exists in the position which left | separated further from the control member K2, and the downward rotation is free.

  From this, the grass collection frame c is raised by 10 centimeters from the position where the wheel 18 and the grass collection frame c shown in FIG. Ascend and descend between the positions while being grounded.

  Therefore, the grass collection frame c is held in a state where the bottom surface is in contact with the ground surface even in the case of irregularities in the field in a normal tedder operation in a normal field, and between the bottom surface of the grass collection frame c and the ground surface. From the interval formed, the grass scraped by the tine b jumps out, and the grass collection loss due to the release from the grass collection line is suppressed.

  Regarding the example shown in the figure, as shown in FIG. 14A, the link mechanism L is prevented from being lowered by the abutment between the connecting rod 21 and the restricting member K1, and is in a fixed state. When the supported grass collection frame c is positioned at the lower limit of the lowering operation and is fixed at that position, the front edge of the tine b at the front edge of the frame column 20 of the grass collection frame c The connecting rod of the link mechanism L so that an interval D of about 5 to 10 mm is formed between the part A facing the rear edge of the turning locus w and the turning locus w of the tip of the tine b. 21. Set the length of the control link 3 and the position of the connecting shaft.

  The grass collecting frame c supported through the link mechanism L is as shown in FIGS. 14 (a), (b), (c), (d), (e) and the explanatory view of the operation of FIG. Operate.

  As shown in FIG. 14A, when the grass collecting frame c at the lower limit of the lowering operation rises, the rear end of the connecting rod 21 is caused by the upward rotation of the connecting rod 21 about the connecting shaft P. The frame column 20 of the grass collection frame c connected to the side via the connection shaft S1 moves away from the turning trajectory w of the tine b. At this time, the control link 3 connects the frame column 20 to each other. In FIG. 14, the attachment angle of the frame column 20 to the connection rod 21 is changed to an acute angle so that the attachment angle of the tine b of the frame column 20 is changed. By bringing the part A facing the turning locus w closer to the turning locus w of the tine b, the grass collection frame c is in the operation locus drawn in the explanatory diagram of the operation of FIG. The distance D formed between the turning locus w of the tip of the tine b and the front surface of the frame column 20 So maintained within a range of 10 millimeters.

  As a result, the grass collection frame c is positioned at the lowland part of the field scene as shown in (a), (b), (c), (d), and (e) in FIG. Rotation trajectory w of the tine b and the frame column 20 from a lowered position to a state where it is located on a flat ground and raised to a standard height position, and a state where it climbs on a raised area and further rises. The set interval D is held between the leading edge of the first and second and the grass collection loss due to the expansion of the interval is suppressed.

  Further, the link mechanism L not only gives the grass collecting frame c an operation for preventing the grass collecting loss during the grass collecting operation, but also stores the grass collecting frame c on the upper surface of the frame 13 of the tedder 1. At this time, the upper control link 3 passes over the connecting shaft S2 that is the fulcrum shaft and rotates to the position where it intersects with the connecting rod 21 in a side view, so that the grass collection is in an inverted posture. The frame c acts so as to be pulled backward, so that the grass collection frame c can be stored on the upper surface of the frame 13.

  17 to 20 show another embodiment. In this example, when the regulating member K1 is provided so as to regulate the downward rotation of the connecting rod 21 pivotally supported by the mounting arm 19 about the connecting shaft P after reaching a predetermined posture. In the above-described embodiment, the connecting rod 21 is in contact with the regulating member K1 provided on the mounting arm 19 in a state where the connecting rod 21 is in a substantially horizontal posture. The mounting position of the regulating member K1 provided on the mounting arm 19 is slightly lowered so that the lowering rotation is regulated by abutting against the regulating member K1 in a state where the position is inclined slightly downward toward the rear and lower. Only the point is different from that of the above-described embodiment, and the other points are the same as those of the above-described embodiment, and the same configuration members are used. The same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  In this example, when the grass collecting frame c is attached to the mounting arm 19 via the link mechanism L including the connecting rod 21 and the control link 3, both the wheel 18 of the tedder 1 and the grass collecting frame c are placed on the flat ground portion. When the position is in the position and orientation, the distance between the front edge of the frame column 20 of the grass collection frame c and the rear edge of the turning locus w of the tip of the tine b is about 5 to 10 mm. The assembly is supported so that a predetermined distance D is formed. Thus, when the grass collecting frame c is in the most lowered state, the bottom surface on the rear end side is lifted as shown in FIG.

  In the above-described embodiment, the attachment rod 21 is attached and supported with the bottom surface of the grass collecting frame c in a posture in which the bottom surface thereof is substantially horizontal with reference to the state position where the connecting rod 21 is lowered to the lower limit of the downward rotation. For this reason, the bottom surface of the grass collecting frame c is slightly floating at the rear end side in the flat area.

  In this embodiment, the grass collecting frame c moves up and down as shown in FIGS. 19A, 19B and 19C during grass collection work. At this time, the distance D formed between the front edge of the frame column 20 of the grass collection frame c and the rear edge of the turning locus w of the tip of the tine b is substantially constant as shown in FIG. Is maintained at the interval D.

It is a top view of the state connected with the tractor of the conventional towed type and biaxial gyro-type tedder. It is a side view of a state same as the above. It is explanatory drawing showing the fluctuation state of the support position with respect to the frame of a grass collection frame at the time of the grass collection work of a tedder same as the above, and explanation of a side view in a state where both the wheel of the tedder and the grass collection frame are located on a flat ground portion of the field FIG. During the above-mentioned work of the tedder, the tedder wheel is located on the flat ground, the grass collection frame is located on the raised part, and a wide gap that generates grass collection loss between the grass collection frame and the tine rotation trajectory It is explanatory drawing which shows the state which occurred. It is explanatory drawing of the state which formed the space | interval which produces | generates a grass-collecting loss between the bottom face of a grass-collecting frame, and a field scene, when the wheel of a tedder is located in a protruding part at the time of a work of a tedder same as the above. It is a side view at the time of the grass collection work which abbreviate | omits and shows the tractor which carries out pulling connection of the tedder which implements this invention. It is a top view at the time of work same as the above-mentioned tedder. It is a side view at the time of the state which folded the folding frame of the tedder same as the above to the upper surface side of the flame | frame, and was stored. It is the expanded side view of the principal part of a tedder same as the above. It is the top view to which the principal part same as the above was expanded. It is the rear elevation which expanded the principal part same as the above. It is explanatory drawing of the state which the grass collection frame fell to the minimum of the descent | fall operation | movement at the time of grass collection work of the tedder same as the above. It is explanatory drawing of the state by which the grass collection frame was pushed up to the highest position assumed at the time of the grass collection work of the tedder same as the above. It is explanatory drawing of the raising / lowering operation | movement with respect to the frame of a grass collection frame at the time of the grass collection work of a tedder same as the above. (B) is a state where the grass collecting frame is located in a shallow lowland area and is slightly lowered, (c) is a state where the grass collecting frame is located in a flat area, and (d) is a grass collecting frame. A state where the grass is located in a slightly raised area, and (e) represents a state where the grass collecting frame is located in the most uplifted area. It is explanatory drawing which drew the operation | movement locus | trajectory of the raising / lowering operation | movement at the time of the grass collection work of the grass collection frame of a tedder same as the above. It is explanatory drawing which shows that the space | interval formed between the front-end | tip part of the tine which is rotating in the raising / lowering operation | movement of a grass collection frame same as the above and the grass collection frame does not change. It is a side view of another Example. It is a top view same as the above. It is explanatory drawing of the raising and lowering operation during the grass collection work of the above-mentioned grass collection frame. (A) is the state where the grass collection frame is located at the most elevated uplifted area, (b) is the grass collection frame. The state located in the flat ground part (c) shows the state located in the most submerged lowland part where the grass collecting frame is assumed. It is explanatory drawing which drew the operation locus | trajectory when the grass collection frame of an Example same as the above raises / lowers.

Explanation of symbols

A A portion facing the trailing edge of the turning trajectory D Interval distance GL Ground surface K1 K2 Restricting member L Link mechanism M Locking mechanism P Connecting shaft T Tractor S1 S2 S3 Connecting shaft a Rotor b Tyne c Grass collecting frame w Turning track 1 Tedder 10 Main part 11 Beam 12 Mount 13/13 Frame 14 Rotating shaft 15 Support arm 16 Input shaft 17 Universal joint shaft 18 Wheel 180 Bracket 19/19 Mounting arm 19a Mounting bracket 20 Frame column 20a Sled-shaped portion 200 Mounting cylinder 201 Screw 202 Locking plate 203 Sliding plate 204 Locking pin 21 Connecting rod 3 Control link

Claims (2)

The front end side of the connecting rod (21) whose longitudinal direction is the front-rear direction is connected to the mounting arm (19) provided to protrude rearward from the frame (13) of the tedder (1) by the connecting shaft (P), The end of the connecting rod (21) on the rear end side that pivots up and down about the connecting shaft (P) is the upper end of the frame column (20) of the grass collecting frame (c), and the connecting shaft (S1). The control link (3) formed shorter than the connection rod (21) is arranged in a posture substantially parallel to the connection rod (21) above the connection rod (21). And the rear end side of the control link (3) is arranged above the connecting shaft (S1) that connects the connecting rod (21) to the frame column (20) and is positioned at the upper end of the frame column (20). through provided a connecting shaft (S3), against the frame column (20), and rotatably connected to upper and lower pivot, the front end of the control link (3), coupling Coupled to provide a mounting arm (19) to pivotally (21) connecting shaft connecting shaft provided being displaced rearwardly to a mounting arm (19) than the (P) (S2), said mounting arm (19 ) Is provided with a restricting member (K1) that prevents the connecting rod (21) from rotating downward about the connecting shaft (P) from the position where the connecting rod (21) is substantially horizontal or slightly inclined downward. A grass-loss reduction device for tedders.   A connecting shaft (P) for pivotally supporting the connecting rod (21) up and down on the mounting arm (19) is disposed on the outer surface side of one of the left and right side walls of the mounting arm (19). 3) A connecting shaft (S2) for pivotally supporting the mounting arm (19) is disposed on the outer surface side of the left and right side walls of the mounting arm (19), so that the connecting rod (21) and the control link (3) The apparatus for reducing grass loss in a tedder according to claim 1, wherein each of them is configured to rotate in a separate space in a plan view.

Images