Disc harrow type tilling machine

Abstract

To improve the transportability of disc harrow-type tilling machines using forklifts. [Solution] In a front or rear view, the space S2 enclosed by the upper end of the soil-crushing disc 16, the lower surface of the main frame 4a, and the side of the disc arm 19 is configured to allow the forks F of a forklift to be inserted from behind, so that the disc harrow type tilling machine 3 can be transported by a forklift without using a pallet.

Description

Technical Field

[0001] The present invention relates to a disk harrow type tillage working machine that is connected to the rear part of a traveling body and used.

Background Art

[0002] There is known a disk harrow type tillage working machine that is connected to the rear part of a traveling body via a lifting link mechanism and tills the soil according to the traveling of the traveling body (see, for example, Patent Document 1). This type of disk harrow type tillage working machine has the advantage that, since the disk penetrates the soil while rotating itself and crushes the soil according to the traveling of the traveling body, not only can the fuel consumption of the traveling body be reduced, but the work can also be speeded up compared to a rotary type tillage working machine that rotates tillage claws with the PTO power of the traveling body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when a disk harrow type tillage working machine is transported alone using a forklift, it needs to be placed on a pallet, and there is room for improvement in terms of transportability.

Means for Solving the Problems

[0005] The present invention was created in view of the above circumstances and with the aim of solving these problems, and the invention of claim 1 is a disc harrow type tilling work machine connected to the rear of a traveling machine via a lifting link mechanism and tilling the soil in accordance with the movement of the traveling machine, comprising: a work machine frame connected to the rear of the traveling machine via the lifting link mechanism; a row of front discs arranged at predetermined intervals in the left-right direction below the front side of the work machine frame and crushing soil in accordance with the movement of the traveling machine; and rear discs arranged at predetermined intervals in the left-right direction below the rear side of the work machine frame and crushing soil in accordance with the movement of the traveling machine. The work machine frame comprises a row of discs and a roller positioned behind the rear disc row so as to be vertically adjustable, and is constructed by connecting a plurality of vertical frames along the front-rear direction and a plurality of horizontal frames along the left-right direction, and the plurality of discs constituting the front disc row and the rear disc row are each rotatably supported at the tip of a disc arm extending downward from the work machine frame, and is configured such that, in a front view or rear view, the forks of a forklift can be inserted from the front or rear into the space enclosed by the upper end of the disc, the lower surface of the vertical frame and the side surface of the disc arm. Furthermore, the invention of claim 2 is a disc harrow type tilling machine as described in claim 1, further comprising a roller support mechanism that raises and lowers the roller in accordance with the operation of an actuator, wherein when the roller is at its upper limit position, the center of gravity of the disc harrow type tilling machine is located behind the front-to-rear center, and the roller and the roller support mechanism do not protrude behind the rear end of the work machine frame, but are retracted above the rear of the work machine frame. Furthermore, the invention of claim 3 is a disc harrow type tilling machine as described in claim 1, further comprising a guide member that restricts the relative left-right movement between the fork and the vertical frame to prevent the vertical frame from coming off the fork. Furthermore, the invention of claim 4 is a disc harrow type tilling machine as described in claim 1, further comprising a weight mounting section arranged on the machine frame and on which a weight can be attached and detached. Furthermore, the invention of claim 5 is a disc harrow type tilling machine as described in claim 4, wherein the machine frame is constructed by connecting a pair of left and right main frames that function as the vertical frames, a front disc support frame, a front reinforcing lateral frame, a rear disc support frame, a rear reinforcing lateral frame, and a pair of left and right reinforcing vertical frames, the pair of left and right main frames are arranged along the front-rear direction and connected to the rear of the traveling machine via the lifting link mechanism, the front disc support frame is arranged along the left-right direction and supports the front disc row, and the front reinforcing The reinforcing lateral frame is positioned along the left-right direction behind the front disc support frame, the rear disc support frame is positioned along the left-right direction behind the front reinforcing lateral frame and supports the rear disc row, the rear reinforcing lateral frame is positioned along the left-right direction behind the rear disc support frame, the pair of left and right reinforcing vertical frames are positioned facing the front-rear direction outside the main frame and each supports the weight mounting portion, and the front reinforcing lateral frame and the rear reinforcing lateral frame each support the guide member. [Effects of the Invention]

[0006] According to the invention of claim 1, it is possible to transport a disc harrow type tilling machine with a forklift without using a pallet. Furthermore, according to the invention of claim 2, when transporting a disc harrow type tilling machine with a forklift, it is possible to prevent the rollers and roller support mechanism from getting in the way, and the disc harrow type tilling machine will have its center of gravity towards the rear, making it easier to transport with a forklift. Furthermore, according to the invention of claim 3, not only is it easier to transport the disc harrow type tilling machine by forklift, but it is also possible to prevent the disc harrow type tilling machine from falling during transport. Furthermore, according to the invention of claim 4, since it is equipped with a weight attachment part to which a weight can be attached and detached, in hard fields the penetrating of the disc can be promoted by increasing the weight, while in soft fields the sinking of the disc can be suppressed by decreasing the weight, and as a result it is possible to improve adaptability to the field. Furthermore, according to the invention of claim 5, since weight mounting parts can be placed on the left and right outer sides of the work machine frame while reinforcing the work machine frame, it becomes possible to apply the weight load in a well-balanced manner. In addition, by reinforcing the work machine frame, it is possible to prevent deformation of the work machine frame when transported by a forklift, and guide members can be attached using the front reinforcing lateral frame and the rear reinforcing lateral frame. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view of a disc harrow-type tilling machine attached to a tractor. [Figure 2] This is a side view of a disc harrow-type tilling machine attached to a tractor. [Figure 3] This is a plan view of a disc harrow-type tilling machine attached to a tractor. [Figure 4] This is a perspective view of a disc harrow type tilling machine. [Figure 5] This is a side view of a disc harrow type tilling machine. [Figure 6] This is a plan view of a disc harrow type tilling machine. [Figure 7] This is a front view of a disc harrow type tilling machine. [Figure 8] This is a rear view of a disc harrow type tilling machine. [Figure 9] This is a side view of a disc harrow type tilling machine with the rollers raised. [Figure 10] This is a rear view of a disc harrow type tilling machine with the rollers raised. [Figure 11] This is a side view of a disc harrow-type tilling machine with the chisel stored away. [Figure 12] It is a side view of a disk harrow type tillage machine showing the transportation state by a forklift. [Figure 13] It is a plan view of a disk harrow type tillage machine showing the transportation state by a forklift.

Embodiments for Carrying out the Invention

[0008] [Disk Harrow Type Tillage Machine] Embodiments of the present invention will be described based on the drawings. In FIGS. 1 to 3, reference numeral 1 denotes a small or medium-sized tractor (traveling body) having a relatively small output horsepower of an engine. A disk harrow type tillage machine 3 (hereinafter sometimes referred to as the tillage machine 3) is connected to the rear portion of the tractor 1 via a lift link mechanism 2 (top link 2a and left and right lower links 2b, 2b). The tillage machine 3 does not require the PTO power of the tractor 1 and tills the soil in accordance with the forward travel of the tractor 1.

[0009] Hereinafter, the tillage machine 3 will be described with reference to FIGS. 1 to 11.

[0010] The tillage machine 3 includes a work machine frame 4 connected to the rear portion of the tractor 1 via a lift link mechanism 2, a front disk row 5 arranged at a predetermined interval in the left-right direction below the front side of the work machine frame 4 and crushing soil in accordance with the travel of the tractor 1, a rear disk row 6 arranged at a predetermined interval in the left-right direction below the rear side of the work machine frame 4 and crushing soil in accordance with the travel of the tractor 1, a roller 7 arranged behind the rear disk row 6 and vertically position-adjustable, a chisel 8 arranged in front of the front disk row 5, and a weight attachment portion 10 to which a weight 9 can be detachably attached.

[0011] [Work Machine Frame] The tillage working machine 3 includes a working machine frame 4 that is lightened using lightweight square steel pipes (square pipes). Specifically described, the working machine frame 4 is configured by connecting a pair of left and right main frames 4a, a front disk support frame 4b, a front reinforcing cross frame 4c, a rear disk support frame 4d, a rear reinforcing cross frame 4e, and a pair of left and right reinforcing vertical frames 4f.

[0012] The pair of left and right main frames 4a are arranged along the front - rear direction and are connected to the rear part of the tractor 1 via a lift link mechanism 2. The front disk support frame 4b is arranged along the left - right direction and supports the front disk row 5. The front reinforcing cross frame 4c is arranged along the left - right direction behind the front disk support frame 4b. The rear disk support frame 4d is arranged along the left - right direction behind the front reinforcing cross frame 4c and supports the rear disk row 6. The rear reinforcing cross frame 4e is arranged along the left - right direction behind the rear disk support frame 4d and supports the roller 7. The pair of left and right reinforcing vertical frames 4f are arranged facing the front - rear direction outside the main frame 4a.

[0013] Also, the front disk support frame 4b, the front reinforcing cross frame 4c, the rear disk support frame 4d, and the rear reinforcing cross frame 4e are connected to the upper surface side of the pair of left and right main frames 4a, and the pair of left and right reinforcing vertical frames 4f are connected to the upper surface side of the front disk support frame 4b, the front reinforcing cross frame 4c, the rear disk support frame 4d, and the rear reinforcing cross frame 4e.

[0014] On the front side of the pair of left and right main frames 4a, a top link mast 11 and a support plate 12 formed by bending a steel plate are fixed. On the upper part of the top link mast 11, a top link pin 13 for connecting to the top link 2a is provided. Also, on the front end parts of the pair of left and right main frames 4a, U - shaped link brackets 14 are respectively fixed, and each link bracket 14 is provided with a lower link pin 15 for connecting to the left and right lower links 2b.

[0015] [disk] Both the front disc row 5 and the rear disc row 6 have multiple soil-crushing discs 16, which are arranged at predetermined intervals in the left-right direction. The soil-crushing discs 16 are dish-shaped discs with a concave curved surface, and have sharp cutting blades formed on their outer edges, which cut crop residue and other materials. The outer edges of the soil-crushing discs 16 also have numerous arc-shaped notches and are sometimes called flower-shaped discs. Due to their flower-shaped disc shape, the soil-crushing discs 16 rotate on their own while penetrating the soil, thereby crushing the soil.

[0016] When tilling the soil with such a flower-shaped soil-crushing disc 16, the soil clumps scraped off by the soil-crushing disc 16 accumulate in the concave, curved surface near the bottom of the disc 16. These accumulated soil clumps are then lifted upward as the soil-crushing disc 16 rotates, and then thrown out to the side from the open side of the curved surface.

[0017] Therefore, when arranging a large number of soil-crushing discs 16 at predetermined intervals in the left-right direction, if their concave curved surfaces are oriented in the same direction, the soil clumps tilled by the numerous soil-crushing discs 16 will be thrown and moved to one side in the left-right direction perpendicular to the forward travel direction of the tractor 1. To address this, the number of soil-crushing discs 16 constituting the front disc row 5 and the rear disc row 6 are made the same, and the orientation of the curved surfaces of the soil-crushing discs 16 constituting each row is made different from each other, for example, the front row facing left and the rear row facing right.

[0018] With this type of disc arrangement, the rear disc row 6 can return soil clumps moved to one side by the front disc row 5 to the other side, thereby leveling the tilled surface in the left-right direction. Furthermore, if the front disc row 5 and the rear disc row 6 are offset by a predetermined distance in the left-right direction, the rear disc row 6 can till any uncultivated land that the front disc row 5 could not till, thereby reducing the unevenness of the tilled surface.

[0019] The individual soil-crushing disc 16 is attached to the front disc support frame 4b and the rear disc support frame 4d via a disc support mechanism 17. The disc support mechanism 17 includes a disc bracket 18, a disc arm 19, and a spring 20.

[0020] The disc bracket 18 is attached to the front disc support frame 4b and the rear disc support frame 4d at predetermined intervals in the left-right direction. The disc arm 19 extends downward and rearward from the disc bracket 18, and its tip rotatably supports the soil-crushing disc 16 via the disc support shaft 21.

[0021] The disc bracket 18 supports the base end of the disc arm 19 via the disc arm support shaft 22 so that it can rotate up and down. The disc bracket 18 also includes a rotation restricting bolt 23 that is parallel to the rear of the disc arm support shaft 22. The rotation restricting bolt 23 passes through an arc-shaped (arc shape centered on the disc arm support shaft 22) elongated hole (not shown) formed in the disc arm 19, allowing the disc arm 19 to rotate up and down within the range of the elongated hole.

[0022] The spring 20 is interposed between the spring receiving portion 18a of the disc bracket 18 and the spring receiving portion 19a of the disc arm 19, biasing the disc arm 19 downward. The spring 20 is, for example, a compression coil spring with adjustable biasing force, and the biasing force is adjusted so that under normal tilling conditions the disc arm 19 is positioned at the lower limit of its swing range, and if the soil-crushing disc 16 comes into contact with an obstacle, the disc arm 19 is allowed to rotate upward to avoid it. This prevents the soil-crushing disc 16 from being damaged by contact with an obstacle.

[0023] [Laura] Roller 7 is located behind the rear disc row 6 and has a first function of finely crushing and cutting soil, soil clumps, or crop residues tilled by the front disc row 5 and rear disc row 6, and a second function of adjusting the tilling depth of the front disc row 5 and rear disc row 6. The first function is achieved by making roller 7 a cage-type roller.

[0024] The second function is achieved by supporting the roller 7 so that its vertical position can be adjusted via a roller support mechanism 24. The roller support mechanism 24 comprises a plurality of roller brackets 25, a roller arm support shaft 26, a pair of left and right roller arms 27, a cylinder connecting arm 28, a cylinder bracket 29, a first link 30, a second link 31, a hydraulic cylinder 32, and a vertical position adjustment handle 33.

[0025] Multiple roller brackets 25 are attached to the rear ends of the rear reinforcing transverse frame 4e or the left and right reinforcing longitudinal frames 4f. The roller arm support shaft 26 is arranged in parallel above the rear reinforcing transverse frame 4e and is rotatably supported by the multiple roller brackets 25. A pair of left and right roller arms 27 are integrally rotatably connected to both ends of the roller arm support shaft 26, and their ends rotatably support the rollers 7 via the roller support shaft 34.

[0026] The cylinder connecting arm 28 is integrally and rotatably connected to the center of the roller arm support shaft 26. The cylinder bracket 29 is fixed in a bridge-like manner along the front-rear direction between the center of the front reinforcing transverse frame 4c and the center of the rear disc support frame 4d. The first link 30 and the second link 31 are rotatably connected to each other at one end via a connecting shaft 35. The other end of the first link 30 is rotatably connected to the tip of the cylinder connecting arm 28, and the other end of the second link 31 is rotatably connected to the rear end of the cylinder bracket 29.

[0027] One end of the hydraulic cylinder 32 is rotatably connected to the front end of the cylinder bracket 29, and the other end is rotatably connected to the connecting shaft 35. When the hydraulic cylinder 32 is extended or retracted, the roller arm support shaft 26 rotates via the first link 30 and the cylinder connecting arm 28, and as a result the pair of left and right roller arms 27 rotate up and down, causing the roller 7 to be raised and lowered. Figures 1 to 8 show the working state with the hydraulic cylinder 32 extended and the roller 7 lowered, while Figures 9 and 10 show the non-working state (storage state) with the hydraulic cylinder 32 retracted and the roller 7 raised.

[0028] The vertical position adjustment handle 33 adjusts the vertical position of the roller 7 when the roller 7 is in the lowered working position. For example, in this embodiment, the vertical position adjustment handle 33 adjusts the vertical position of the roller 7 by changing the relative angle between the first link 30 and the cylinder connecting arm 28 when the hydraulic cylinder 32 is fully extended, but a detailed explanation is omitted.

[0029] [Chisel] The chisel 8 penetrates the soil in front of the front disc row 5, thereby breaking up the soil and assisting in the penetration of the front disc row 5 and the rear disc row 6. The chisel 8 may be a pair, left and right, as in this embodiment, but there may be one or two or more.

[0030] The chisel 8 comprises a chisel bracket 36, a first chisel arm 37, a second chisel arm 38, a soil-crushing blade 39, and a resistance plate 40.

[0031] The chisel bracket 36 is attached to the front disc support frame 4b at a predetermined distance in the left-right direction. The first chisel arm 37 is supported by the chisel bracket 36 so as to be vertically slidable and is fixed to the chisel bracket 36 via bolts B1. In addition, a second chisel arm 38 is detachably fixed to the tip of the first chisel arm 37 via a plurality of bolts B2. Since the second chisel arm 38 is pre-integrated with the soil-crushing blade 39 and resistance plate 40, if the soil-crushing blade 39 and resistance plate 40 wear out or are damaged, the soil-crushing blade 39 and resistance plate 40 can be replaced by attaching and detaching the second chisel arm 38 to the first chisel arm 37.

[0032] Furthermore, the first chisel arm 37 is provided with a plurality of fixing holes 37a arranged in the longitudinal direction. When the first chisel arm 37 is fixed to the chisel bracket 36 so that the bolt B1 passes through the fixing hole 37a on the base end, the soil-crushing blade 39 is in an operational state where it is positioned at the same depth as the front disc row 5, as shown in Figure 5. When the first chisel arm 37 is fixed to the chisel bracket 36 so that the bolt B1 passes through the fixing hole 37a on the tip end, the soil-crushing blade 39 is in a retracted state where it is moved upward, as shown in Figure 11. The chisel 8 of this embodiment can be switched between an operational state where it is driven into the field and a retracted state where it is moved upward and does not act on the soil.

[0033] The soil-crushing blade 39 and the resistance plate 40 are integrally fixed to the second chisel arm 38 by welding or the like. The soil-crushing blade 39 has a sharp, sled-like shape at its front end and penetrates the soil as the machine moves. In addition, the soil-crushing blade 39 is inclined so that it is lower towards the front. This allows the soil-crushing blade 39 to exert a downward vector on the chisel 8 as it moves through the soil, promoting penetration of the front disc row 5 and the rear disc row 6.

[0034] [Weight mounting section] The weight mounting section 10 is configured to allow the weight 9 to be attached and detached. For example, the weight mounting section 10 in this embodiment is integrally configured to include a frame fixing section 10a fixed to the upper surface of the work machine frame 4, a pair of legs 10b rising from both ends of the frame fixing section 10a, and a hanger section 10c connecting the upper ends of the pair of legs 10b, and multiple (for example, three) weights 9 can be attached and detached from the hanger section 10c by hooking them.

[0035] Specifically, the weight 9 has a hook portion 9a, and is attached to the weight mounting portion 10 by hooking this hook portion 9a onto the hanger portion 10c. A fixing bolt B3 is screwed into the hook portion 9a of the weight 9, and by tightening this fixing bolt B3, the hook portion 9a of the weight 9 is tightly pressed against the hanger portion 10c, preventing the weight 9 from falling off. In this embodiment, the weight 9 is a repurposed front weight attached to the front end of the tractor 1, but the weight and shape of the weight 9 can be changed as desired.

[0036] Multiple weight mounting sections 10 are provided, distributed to the front and rear and left and right sides of the implement frame 4. Specifically, the weight mounting section 10 includes a left front weight mounting section 10FL located on the left front of the implement frame 4, a right front weight mounting section 10FR located on the right front of the implement frame 4, a left rear weight mounting section 10RL located on the left rear of the implement frame 4, and a right rear weight mounting section 10RR located on the right rear of the implement frame 4. In this way, the weights 9 can be distributed to the left and right and front and rear of the implement frame 4, thereby reducing the behavior of the tilling implement 3 when subjected to external forces from the field surface and lifting due to bending of the implement frame 4, and stabilizing the penetration of the front disc row 5 and rear disc row 6 into the soil. On the other hand, if the weight 9 is concentrated in the center of the tilling implement 3, and the tilling implement 3 receives an external force biased to one corner due to unevenness in the field, the weight 9 cannot receive the external force. This can cause the tilling implement 3 to shake or wobble, or the implement frame 4 to bend due to the external force, potentially preventing proper tilling. However, the tilling implement 3 of this embodiment can resolve these problems.

[0037] The left front weight mounting section 10FL is provided on the upper surface of the front end of the left reinforcing vertical frame 4f, and the left rear weight mounting section 10RL is provided on the upper surface of the rear end of the left reinforcing vertical frame 4f. The right front weight mounting section 10FR is provided on the upper surface of the front end of the right reinforcing vertical frame 4f, and the right rear weight mounting section 10RR is provided on the upper surface of the rear end of the right reinforcing vertical frame 4f. In this way, the weight mounting sections 10 can be positioned near the four corners of the work machine frame 4, allowing the weight load to be applied in a well-balanced manner. In addition, since the weight mounting sections 10 are positioned as high as possible on the work machine frame 4 (on the upper surface of the reinforcing vertical frame 4f), the possibility of grass and mud accumulating on the weights 9 attached to the weight mounting sections 10 can be reduced.

[0038] Furthermore, as shown in Figure 5, the weight mounting portion 10 (weight 9) is positioned above the disc support shaft 21 in a side view. In this configuration, the weight 9 absorbs the upward load received by the front disc row 5 and the rear disc row 6 from the soil, thereby promoting penetration of the front disc row 5 and the rear disc row 6 into the soil.

[0039] Furthermore, as shown in Figure 5, the weight mounting portion 10 (weight 9) is positioned on a virtual line L passing through the disc support shaft 21 and the spring 20 in a side view. In this configuration, when the spring 20 contracts due to the upward load received by the front disc row 5 and the rear disc row 6 from the soil, the weight 9 supports the spring 20, thereby promoting the penetration of the front disc row 5 and the rear disc row 6 into the soil.

[0040] Furthermore, since the weight attachment portion 10 (weight 9) is positioned near the chisel 8 in a plan view, the load of the weight 9 attached to the weight attachment portion 10 can promote the penetration of the chisel 8.

[0041] Furthermore, the weight mounting section 10 allows for the selection of the number of weights 9 to be attached, and the chisel 8 can be selectively switched between an active state and a retracted state. Based on the selection of these two states, the adaptability to the field can be further improved.

[0042] Furthermore, as shown in Figures 3 and 6, a space S is formed on both the left and right sides of the tilling implement 3, allowing a person to enter. This space S is located between the front disc row 5 and the rear disc row 6, and is situated outside the reinforcing vertical frame 4f. With such a space S, the person can get close to the weight mounting section 10 when attaching or detaching the weight 9, making the attachment and detachment of the weight 9 easier.

[0043] [Space and guide member for inserting forks] Next, the space S2 for inserting the forks and the guide member 51 provided in the tilling implement 3 will be described with reference to Figures 7, 8, 10, 12, and 13.

[0044] As shown in Figures 7, 8, and 10, the tilling implement 3 has a space S2 enclosed by the upper end of the soil-crushing disc 16, the lower surface of the main frame 4a, and the side of the disc arm 19 when viewed from the front or rear. As shown in Figures 12 and 13, this space S2 is configured so that the forks F of a forklift (not shown) can be inserted from behind. Furthermore, the space S2 is formed below each of the left and right main frames 4a, and by inserting the left and right forks F of a forklift into the left and right spaces S2 from behind, the tilling implement 3 can be transported by a forklift without using a pallet.

[0045] Furthermore, in the tilling implement 3 of this embodiment, when the roller 7 is raised to its upper limit position (upper limit position due to mechanical stopper or control restriction) by the operation of the hydraulic cylinder 32, the center of gravity of the tilling implement 3 becomes rearward of the front-to-rear center, and the roller 7 and roller support mechanism 24 do not protrude rearward from the rear end of the implement frame 4, but are retracted to the upper rear of the implement frame 4. In this way, as shown in Figures 12 and 13, it is possible to prevent the roller 7 and roller support mechanism 24 from getting in the way when transporting the tilling implement 3 with a forklift, and the tilling implement 3 has a rearward center of gravity, making it easier to transport with a forklift.

[0046] Furthermore, the tilling implement 3 is equipped with guide members 51 that restrict the relative lateral movement between the forks F and the main frame 4a, thereby preventing the main frame 4a from detaching from the forks F. As shown in Figure 10 and other figures, the guide members 51 have a frame shape (either a V-shape or a U-shape) into which the forks F can be inserted from the rear, and multiple guide members 51 are provided at predetermined intervals in the front-rear direction within the left and right spaces S2. For example, in this embodiment, as shown in Figure 12 and other figures, a pair of front and rear guide members 51 are provided in each of the left and right spaces S2. Such guide members 51 not only facilitate the transport of the tilling implement 3 by forklift, but also prevent the tilling implement 3 from falling during transport.

[0047] Furthermore, the guide member 51 is attached using the front and rear reinforcing lateral frames 4c and 4e. In this way, the reinforcement of the work machine frame 4 by the reinforcing lateral frames 4c and 4e not only prevents deformation of the work machine frame 4 when transported by a forklift, but the front and rear reinforcing lateral frames 4c and 4e can also be used as mounting members for the guide member 51.

[0048] [Effects of the Embodiment] According to this embodiment configured as described, a disc harrow type tilling implement 3 is connected to the rear of a tractor 1 via a lifting link mechanism 2 and tills the soil in accordance with the movement of the tractor 1, comprising: an implement frame 4 connected to the rear of the tractor 1 via a lifting link mechanism 2; a front row of discs 5 arranged at predetermined intervals in the left-right direction below the front of the implement frame 4 and crushing soil in accordance with the movement of the tractor 1; a rear row of discs 6 arranged at predetermined intervals in the left-right direction below the rear of the implement frame 4 and crushing soil in accordance with the movement of the tractor 1; and rollers 7 arranged behind the rear row of discs 6 so as to be vertically adjustable, wherein the implement frame 4 is arranged horizontally along the front-rear direction. The system is constructed by connecting a pair of vertical frames (4a, 4f), such as a main frame 4a, and a plurality of horizontal frames (4b to 4e) that run along the left-right direction. The plurality of soil-crushing discs 16 that make up the front disc row 5 and the rear disc row 6 are each rotatably supported at the tip of a disc arm 19 that extends downward from the work machine frame 4. In a front or rear view, the space S2 enclosed by the upper end of the soil-crushing disc 16, the lower surface of the main frame 4a, and the side of the disc arm 19 allows the forks F of a forklift to be inserted from behind. This makes it possible to transport the disc harrow type tilling work machine 3 with a forklift without using a pallet (not shown).

[0049] Furthermore, the disc harrow type tilling implement 3 is equipped with a roller support mechanism 24 that raises and lowers the roller 7 in accordance with the operation of the hydraulic cylinder 32. When the roller 7 is at its upper limit position, the center of gravity of the disc harrow type tilling implement 3 is located behind the front-to-rear center, and the roller 7 and roller support mechanism 24 do not protrude behind the rear end of the implement frame 4, but are retracted to the upper rear of the implement frame 4. This prevents the roller 7 and roller support mechanism 24 from getting in the way when transporting the disc harrow type tilling implement 3 with a forklift, and also makes it easier to transport the disc harrow type tilling implement 3 with a forklift because its center of gravity is located towards the rear.

[0050] Furthermore, the disc harrow type tilling implement 3 is equipped with a guide member 51 that restricts the relative lateral movement between the fork F and the main frame 4a, thereby preventing the main frame 4a from detaching from the fork F. This not only facilitates the transport of the disc harrow type tilling implement 3 by forklift, but also prevents the disc harrow type tilling implement 3 from falling during transport.

[0051] Furthermore, the disc harrow-type tilling implement 3 is equipped with a weight attachment section 10 on the implement frame 4, to which a weight 9 can be attached and detached. In hard fields, increasing the weight 9 promotes penetration of the soil-crushing disc 16, while in soft fields, decreasing the weight 9 suppresses the sinking of the soil-crushing disc 16. As a result, it is possible to improve adaptability to different field conditions.

[0052] Furthermore, the implement frame 4 is constructed by connecting a pair of left and right main frames 4a, a front disc support frame 4b, a front reinforcing lateral frame 4c, a rear disc support frame 4d, a rear reinforcing lateral frame 4e, and a pair of left and right reinforcing vertical frames 4f. The pair of left and right main frames 4a are arranged along the front-rear direction and connected to the rear of the tractor 1 via a lifting link mechanism 2. The front disc support frame 4b is arranged along the left-right direction and supports the front disc row 5. The front reinforcing lateral frame 4c is arranged behind the front disc support frame 4b along the left-right direction, and the rear disc support frame 4d is The front reinforcing lateral frame 4c is positioned behind the rear of the rear disc support frame 4d, along the left-right direction, and supports the rear disc row 6. The rear reinforcing lateral frame 4e is positioned behind the rear disc support frame 4d, along the left-right direction, and the pair of left and right reinforcing vertical frames 4f are positioned outside the main frame 4a, facing the front-rear direction, and each supports the weight mounting section 10. The front reinforcing lateral frame 4c and the rear reinforcing lateral frame 4e each support the guide member 51. Thus, the weight mounting section 10 can be positioned on the left and right outer sides of the work machine frame 4 while reinforcing the work machine frame 4, and as a result, the weight load can be applied in a well-balanced manner. Furthermore, the reinforcement of the work machine frame 4 not only prevents deformation of the work machine frame 4 during transportation by forklift, but also allows the guide member 51 to be attached using the front reinforcing lateral frame 4c and the rear reinforcing lateral frame 4e.

[0053] It should be noted that the present invention is not limited to the embodiments described above, and various modifications and changes are possible within the scope of the claims. For example, in the embodiments described above, the forks F of the forklift can be inserted into the space S2 from the rear, but the forks F may be inserted into the space S2 from the front.

[0054] Furthermore, the guide member 51 may be fixedly attached to the work machine frame 4, but it may also be movable between a working state in which the fork F can be inserted from the rear and a retracted state in which it is moved upward from the working state. In this way, the guide member 51 can be moved upward when not in use, thereby reducing the possibility of grass and mud accumulating on the guide member 51 during tilling work.

[0055] Furthermore, a mechanism may be provided that automatically moves the guide member 51 from the retracted state to the operational state in conjunction with the retracted and raised movement of the roller 7, and automatically moves the guide member 51 from the operational state to the retracted state in conjunction with the lowering movement of the roller 7. In this way, manual movement of the guide member 51 becomes unnecessary. [Explanation of Symbols]

[0056] 1 tractor 2. Lifting link mechanism 2a Top Link 2b Lower Link 3. Disc harrow type tilling machine 4. Work machine frame 4a Mainframe (Vertical Frame) 4b Front disk support frame (horizontal frame) 4c Front reinforcement side frame (side frame) 4D Rear disc support frame (horizontal frame) 4e Rear reinforcement lateral frame (lateral frame) 4F Reinforcement vertical frame (vertical frame) 5 Front disk row 6. Rear disk row 7 Laura 8 Chisels 9 weights 9a Hook part 10 Weight mounting section 10FL Left front weight mounting area 10FR Right front weight mounting area 10RL Left rear weight mounting area 10RR Right rear weight mounting area 10a Frame fixing part 10b Legs 10c Hanger section 11. Top link mast 12 support plates 13 Top Link Pins 14 Link Bracket 15 Lower Link Pins 16. Soil-crushing disc (disc) 17. Disk support mechanism 18 Disc Bracket 18a Spring support 19 Disc Arm 19a Spring support 20 springs 21 Disk support axis 22 Disc arm support shaft 23 Rotation regulating bolts 24 Roller support mechanism 25 Roller Bracket 26 Roller arm support shaft 27 Roller Arm 28 Cylinder connecting arm 29 Cylinder bracket 30. Link 1 31. Second Link 32 Hydraulic Cylinders 33. Adjustable handle for vertical positioning 34 Roller support shaft 35 Connecting shaft 36 Chisel Bracket 37. First Chisel Arm 37a Fixing hole 38. Second Chisel Arm 39 Soil-crushing blade 40 Resistance plate 51 Guide member S2 space F Fork

Claims

1. A disc harrow type tilling implement is connected to the rear of a traveling machine via a lifting link mechanism and tills the soil in accordance with the movement of the traveling machine, A work machine frame connected to the rear of the aforementioned traveling machine body via the aforementioned lifting link mechanism, The front row of discs is arranged at predetermined intervals in the left-right direction on the lower front side of the work machine frame, and crushes soil in accordance with the movement of the traveling machine, The rear disc row is arranged at predetermined intervals in the left-right direction below the rear side of the work machine frame, and crushes soil in accordance with the movement of the traveling machine, The rearmost disc row is provided with rollers that are vertically adjustable, The aforementioned work machine frame is constructed by connecting a plurality of vertical frames along the front-to-back direction and a plurality of horizontal frames along the left-to-right direction. The multiple disks constituting the front disk row and the rear disk row are each rotatably supported at the tip of a disk arm extending downward from the work machine frame. A disc harrow type tilling machine characterized in that, when viewed from the front or rear, the space enclosed by the upper end of the disc, the lower surface of the vertical frame, and the side surface of the disc arm is configured to allow the forks of a forklift to be inserted from the front or rear.

2. The system further includes a roller support mechanism that raises and lowers the roller in accordance with the operation of the actuator. The disc harrow type tilling machine according to claim 1, characterized in that when the roller is at its upper limit position, the center of gravity of the disc harrow type tilling machine is located behind the front-to-rear center, and the roller and the roller support mechanism do not protrude behind the rear end of the work machine frame, but are retracted above the rear of the work machine frame.

3. The disc harrow type cultivator according to claim 1, further comprising a guide member that restricts the relative lateral movement between the fork and the vertical frame to prevent the vertical frame from coming off the fork.

4. The disc harrow type tilling machine according to claim 1, further comprising a weight mounting section arranged on the work machine frame and on which a weight can be attached and detached.

5. The aforementioned work machine frame is constructed by connecting a pair of left and right main frames that function as the vertical frames, a front disc support frame, a front reinforcing horizontal frame, a rear disc support frame, a rear reinforcing horizontal frame, and a pair of left and right reinforcing vertical frames. The left and right main frames are arranged along the front-rear direction and are connected to the rear of the mobile body via the lifting link mechanism. The front disk support frame is arranged to align with the left-right direction and supports the front disk row. The aforementioned front reinforcing lateral frame is positioned behind the front disc support frame so as to be aligned in the left-right direction. The rear disk support frame is positioned behind the front reinforcing transverse frame and along the left-right direction, and supports the rear disk row. The aforementioned rear reinforcing lateral frame is positioned behind the rear disc support frame so as to be aligned in the left-right direction. The left and right pairs of reinforcing vertical frames are arranged to face in the front-to-back direction on the outside of the main frame, and each supports the weight mounting portion. The disc harrow type tilling machine according to claim 4, characterized in that the front reinforcing lateral frame and the rear reinforcing lateral frame each support the guide member.

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