Work vehicle

Abstract

To provide an agricultural material supply device which is used for a work vehicle equipped with an agricultural material supply unit that has a delivery part that delivers an agricultural material from a tank and supplies the delivered agricultural material to a farm field, and which can easily supply the agricultural material to the tank.SOLUTION: An agricultural material supply device includes a conveyance device 40 which conveys a supply member 30 that is loaded with an agricultural material between a loading position N and a material input position S for inputting the agricultural material to a tank 21. The agricultural material supply device includes an attitude adjustment mechanism 60 which adjusts the attitude of the supply member 30 to the holding attitude of holding the agricultural material when the supply member 30 is located at the loading position N and the supply member 30 is conveyed from the loading position N to the material input position S, and adjusts the attitude of the supply member 30 to the material input attitude of inputting the agricultural material to the tank 21 when the supply member 30 is located at the material input position S.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a work vehicle equipped with an agricultural material supply unit that delivers agricultural materials from a tank and supplies them to a field. Regarding do. [Background technology]

[0002] A riding rice transplanter, for example, as shown in Patent Document 1, is a conventional work vehicle equipped with an agricultural material supply unit that unloads agricultural materials from a tank and supplies them to a field. The riding rice transplanter is equipped with a fertilizer applicator (corresponding to the agricultural material supply unit) at the rear of the vehicle body. The fertilizer applicator is equipped with a hopper (corresponding to the tank) that stores fertilizer as the agricultural material, and a supply unit (corresponding to the delivery unit) connected to the bottom of the hopper. The supply unit supplies the fertilizer to the field by unloading it from the hopper and supplying it to a furrow former via a hose. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-112877 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of work vehicle, agricultural materials must be loaded from containers such as bags into the tank by manual work on a step attached to the vehicle body, which requires a great deal of effort. In particular, when loading materials from bags, the heavy bags must be carried.

[0005] This invention allows for easy supply of agricultural materials to the tank. Work vehicle to provide. [Means for solving the problem]

[0006] The present invention provides The agricultural material supply unit has a tank for storing agricultural materials and a delivery unit for delivering the agricultural materials from the tank and delivering the delivered agricultural materials to a field. Re, before Agricultural material supply device used to supply agricultural materials to the tank A work vehicle equipped with The agricultural material supply device is provided in front of the tank, and the agricultural material supply device is A supply member for loading agricultural materials, and a loading position for loading the agricultural materials onto the supply member. and the supply member is conveyed from the loading position toward the tank, a conveying device that conveys the supplying member between the tank and a material input position where agricultural materials are input into the tank, and an attitude adjustment mechanism that adjusts the attitude of the supplying member, wherein the attitude adjustment mechanism adjusts the attitude of the supplying member when the supplying member is located at the loading position and when the supplying member is conveyed from the loading position to the material input position, The agricultural materials loaded onto the supply member are held by the supply member. The supply member is configured to be adjusted to a holding position, and when the supply member is located at the material input position, the supply member is adjusted to a material input position in which agricultural materials are input into the tank. In the present invention, The attitude adjustment mechanism is preferably configured to adjust the attitude of the supply member to the holding attitude when the supply member is transported from the material input position to the loading position. In the present invention, The supply member is preferably configured to load agricultural materials in material bags. be. The present invention provides An agricultural material supply device for a work vehicle equipped with an agricultural material supply unit having a tank for storing agricultural materials and a delivery unit for delivering agricultural materials from the tank and delivering the delivered agricultural materials to a field, the agricultural material supply device being used to deliver agricultural materials to the tank, The tank is equipped with a supply member for loading agricultural materials, a lifting device for raising and lowering the supply member between a loading position where the agricultural materials are loaded onto the supply member and a material loading position where the agricultural materials are loaded into the tank, and an attitude adjustment mechanism for adjusting the attitude of the supply member, wherein the attitude adjustment mechanism is configured to adjust the attitude of the supply member to an upward holding attitude so as to hold the agricultural materials when the supply member is located at the loading position and when the supply member rises between the loading position and the material loading position, and to adjust the attitude of the supply member to a tilted material loading attitude so as to load the agricultural materials into the tank when the supply member is located at the material loading position.

[0007] According to this configuration, the supply member loaded with agricultural materials is adjusted to a holding position by the attitude adjustment mechanism while being raised to the material input position by the lifting device, and the agricultural materials are transported upward to the material input position, and the attitude of the supply member positioned at the material input position is adjusted to the material input position by the attitude adjustment mechanism, and the agricultural materials are input from the supply member into the tank, so that agricultural materials can be easily supplied to the tank by simply loading the agricultural materials onto the supply member positioned at the loading position.

[0008] In the present invention, The supply member is configured to load agricultural materials in material bags, and the lifting device is configured to raise the supply member between the loading position and the material input position and to lower the supply member between the material input position and a bag unloading position where the material bags are unloaded from the supply member, and is preferably configured such that when the supply member is located at the loading position, when the supply member rises between the loading position and the material input position, when the supply member descends between the material input position and the bag unloading position, and when the supply member is located at the bag unloading position, the supply member supports the material bags in an upward position, and when the supply member is located at the material input position, the supply member supports the material bags in a reclined position to load agricultural materials into the tank.

[0009] According to this configuration, the supply member loaded with material bags containing agricultural materials is adjusted in position by the position adjustment mechanism and raised by the lifting device to the material input position, so that the material bags are supported in an upward position and transported upward to the material input position, and the position of the supply member positioned at the material input position is adjusted to the material input position by the position adjustment mechanism, so that the material bags are tilted and the agricultural materials are loaded from the material bags into the tank, so that the agricultural materials can be loaded onto the supply member while still in the material bags, and the agricultural materials can be easily supplied to the tank without the trouble of removing them from the material bags. After the agricultural materials have been supplied to the tank, the supply member holding the material bags is adjusted in position by the position adjustment mechanism and lowered by the lifting device to the bag removal position, so that the material bags are supported in an upward position and transported downward to the bag removal position, making it easy to collect the material bags after the agricultural materials have been supplied to the tank. To easily collect agricultural materials without spilling them from a material bag, even if the agricultural materials contained in the material bag cannot be supplied to a tank and remain in the material bag.

[0010] In the present invention, It is preferable that a clamping mechanism is provided which can be switched between a clamping state in which the material bag is clamped and fixed to the supply member, and a clamping release state in which the clamping of the material bag is released and the fixation of the material bag to the supply member is released, and that the clamping mechanism is configured to be switched to the clamping release state when the supply member is located at the loading position and the bag unloading position, and to be switched to the clamping state when the supply member rises between the loading position and the material input position, when the supply member is located at the material input position, and when the supply member descends between the material input position and the bag unloading position.

[0011] With this configuration, when the material bag is conveyed upward from the loading position to the material input position, it is clamped by the clamping mechanism and firmly fixed in an upward position to the supply member. Also, when the material bag falls over at the material input position to supply agricultural materials to the tank, the material bag is clamped by the clamping mechanism and firmly fixed in a fallen position to the supply member, so it is possible to reliably prevent the agricultural materials from spilling out of the material bag and being wasted.

[0012] When the material bag after supplying agricultural materials to the tank is conveyed downward from the material input position to the bag unloading position, the material bag is firmly fixed to the supply member by being clamped by the clamping mechanism, so that the material bag does not fall off the supply member and is easy to collect. Also, even if agricultural materials remain in the material bag, they do not spill and are easy to collect.

[0013] In the present invention, It is preferable that the clamping mechanism is configured so that the clamping force that clamps the material bag when the supply member rises to the material loading position beyond the intermediate raised position between the loading position and the material loading position, and when the supply member is located at the material loading position, is stronger than the clamping force that clamps the material bag when the supply member rises from the loading position to the intermediate raised position.

[0014] According to this configuration, if the material bag loaded on the supply member at the loading position is in an unstable loading position, when the supply member begins to rise from the loading position, the material bag will move due to static inertia against the clamping force of the clamping mechanism until the supply member is raised to the intermediate raised position, making it possible to stabilize the loading position of the material bag.However, when the material bag passes the intermediate raised position and is transported upward to the material input position, and when the material bag is positioned at the material input position, the material bag will be firmly fixed to the supply member by a strong clamping force.Therefore, even if the material bag is loaded on the supply member in an unstable loading position, the material bag will naturally assume a stable loading position and will be transported upward to the material input position while firmly fixed to the supply member in a stable loading position, preventing agricultural materials from spilling out of the material bag and being wasted.

[0015] In the present invention, Preferably, the clamping mechanism comprises a clamping arm that is swingably supported on the supply member and whose position changes by swinging between a clamping position in which the material bag is clamped and a clamping release position in which the clamping of the material bag is released, a spring that urges the clamping arm to swing into the clamping position, an operating arm that is swingably supported on the supply member in a state in which it can swing integrally with the clamping arm and operates to swing the clamping arm, and a clamping switching unit that is provided on a fixed part and pushes the operating arm to switch the clamping arm to the clamping release position against the spring, and releases the push on the operating arm to switch the clamping arm to the clamping position by the spring.

[0016] With this configuration, in order to obtain an operating structure for switching the position of the clamping arm, a simple structure can be achieved that only requires a spring, an operating arm, and a clamping switching unit, while allowing the clamping arm to swing, compared to a configuration in which the clamping arm is operated by an actuator such as a cylinder.

[0017] In the present invention, It is preferable that a discharge mechanism be provided for discharging the material bags from the supply member when the supply member is lowered to the bag lowering position.

[0018] According to this configuration, the material bag that has been lowered and conveyed to the bag unloading position is discharged from the supply member by the discharge mechanism, which eliminates the need to remove the material bag from the supply member.

[0019] In the present invention, Preferably, the discharge mechanism comprises a discharge arm that is swingably supported on the supply member and whose position changes by swinging between an active position that pushes the material bag out of the supply member and an active release position that allows the material bag to be loaded onto the supply member; an operating arm that is swingably supported on the supply member in a state that allows it to swing integrally with the discharge arm and operates to swing the discharge arm; and a discharge switching unit that is provided on a fixed part and presses the operating arm to swing the discharge arm to the active position and releases the pressing operation on the operating arm to allow the discharge arm to switch to the active release position.

[0020] With this configuration, compared to a configuration in which the discharge arm is operated by an actuator such as a cylinder, a simple structure can be achieved by providing only a spring, an operating arm, and a discharge switching unit, while allowing the discharge arm to swing.

[0021] In the present invention, It is preferable that the lifting device comprises a lifting guide rail, a lift member supported on the lifting guide rail so that the supply member can be raised and lowered while swingably supporting the supply member between the holding position and the material input position, and a drive mechanism for raising and lowering the lift member.

[0022] According to this configuration, the position of the supply member can be adjusted between the holding position and the material charging position by adjusting the swing of the supply member relative to the lift member, so that the position of the supply member can be easily adjusted.

[0023] In the present invention, It is preferable that the posture adjustment mechanism is provided in a state in which the supply member is supported so as to be able to slide, and is equipped with a posture adjustment guide that adjusts the posture of the supply member to the holding posture and the material input posture by swinging and adjusting the supply member relative to the lift member.

[0024] According to this configuration, a posture adjustment mechanism can be obtained with a simple structure that merely includes a posture adjustment guide, compared to a configuration in which the supply member is adjusted to swing by an actuator such as a cylinder.

[0025] In the present invention, The supply member, the lifting device, and the attitude adjustment mechanism are preferably provided on the work vehicle.

[0026] According to this configuration, agricultural materials can be easily supplied to the tank without the trouble of bringing the supply member, lifting device, and attitude adjustment mechanism to the work machine. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a left side view showing the entire riding rice transplanter. [Figure 2] FIG. 1 is a plan view showing the entire riding rice transplanter. [Figure 3] FIG. 2 is a front view showing the agricultural material supplying device. [Figure 4] FIG. 2 is a left side view showing the agricultural material supplying device. [Figure 5] FIG. 2 is a perspective view of the agricultural material supply device in an exploded state. [Figure 6] 1 is a left side view showing the agricultural material supply device with the supply member located at the loading position. FIG. [Figure 7] 1 is a left side view showing the agricultural material supply device with the supply member in an intermediate raised position. FIG. [Figure 8] 1 is a left side view showing the agricultural material supply device with the supply member positioned between an intermediate raised position and a material input position. FIG. [Figure 9] 1 is a left side view showing the agricultural material supply device with the supply member positioned between an intermediate raised position and a material input position. FIG. [Figure 10] 1 is a left side view showing the agricultural material supply device with the supply member positioned between an intermediate raised position and a material input position. FIG. [Figure 11] 1 is a left side view showing the agricultural material supply device with the supply member located at the material input position. FIG. [Figure 12] 1 is a left side view showing the agricultural material supply device with the supply member located in the bag unloading position. FIG. [Figure 13] FIG. 2 is a block diagram showing a control device. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The agricultural material supply device A is used to supply fertilizer (an example of an "agricultural material") to a tank 21 provided in an agricultural material supply unit 20 of a riding rice transplanter (an example of a "work vehicle") equipped with the agricultural material supply unit 20.

[0029] In the following explanation, with regard to the running body of the riding rice transplanter, the direction of arrow F shown in Figures 1 and 2 is referred to as the "forward body," the direction of arrow B is referred to as the "rearward body," the direction of arrow U shown in Figure 1 is referred to as the "upward body," the direction of arrow D is referred to as the "downward body," the direction of arrow L shown in Figure 2 is referred to as the "leftward body," and the direction of arrow R is referred to as the "rightward body."

[0030] [Configuration of riding rice transplanters] As shown in Figures 1 and 2, the riding rice transplanter has a traveling body 3 supported by a pair of left and right front wheels 1 that can be driven and steered, and a pair of left and right rear wheels 2 that can also be driven. A motor unit 5 equipped with an engine 4 is formed at the front of the traveling body 3. A driver's seat 6 and a driver's unit 8 equipped with a steering wheel 7 for steering the front wheels 1 are formed at the rear of the traveling body 3. A seedling planting device 9 is connected to the rear of the traveling body 3. The seedling planting device 9 is equipped with a chemical spraying device 10 that sprays chemicals on the field after the seedlings have been planted by the seedling planting device 9. Two agricultural material supply units 20 are provided on the traveling body 3 behind the driver's seat 6, lined up on the left and right of the machine.

[0031] [Configuration of seedling planting device] As shown in Figure 1, the seedling planting device 9 is connected to the traveling body 3 by supporting the seedling planting device 9 at the rear of a link mechanism 11 that extends rearward from the body frame 3a of the traveling body 3 so that it can swing up and down. The link mechanism 11 is swung relative to the body frame 3a by the extension and contraction of the lifting cylinder 12, and the seedling planting device 9 is raised and lowered between a lowered working state in which the ground float 13 touches the field surface, and an raised non-working state in which the ground float 13 is separated above the field surface.

[0032] As shown in Figures 1 and 2, the seedling planting device 9 is equipped with eight seedling planting mechanisms 14 arranged at intervals in the left-right direction of the traveling body 3 at the rear of the seedling planting device 9, and a seedling carrier 15 arranged in front of the eight seedling planting mechanisms 14. The seedling carrier 15 is configured to carry mat-shaped seedlings arranged in the left-right direction to be supplied to the eight seedling planting mechanisms 14, and is transported back and forth left and right in conjunction with the seedling planting movement of the seedling planting mechanisms 14 to supply the mat-shaped seedlings placed thereon to the eight seedling planting mechanisms 14. The seedling planting device 9 is configured to be able to plant seedlings in eight planting rows.

[0033] [Composition of the Agricultural Materials Supply Department] Of the two agricultural material supply units 20, the left agricultural material supply unit 20 performs fertilization work of supplying fertilizer to seedlings planted by the four seedling planting mechanisms 14 from the left end to the fourth out of the eight seedling planting mechanisms 14. Of the two agricultural material supply units 20, the right agricultural material supply unit 20 performs fertilization work of supplying fertilizer to seedlings planted by the four seedling planting mechanisms 14 from the right end to the fourth out of the eight seedling planting mechanisms 14.

[0034] Specifically, the left and right agricultural material supply units 20 are equipped with a tank 21 for storing fertilizer, and a delivery unit 22 connected to the bottom of the tank 21, which delivers fertilizer from the tank 21 and supplies the delivered fertilizer to the field to the side of the seedlings planted by the seedling planting mechanism 14.

[0035] More specifically, blowers 23 are connected to the delivery sections 22 of the left and right agricultural material supply sections 20. The blowers 23 have intake ducts 24 extending toward the motor section 5, and draw in air whose temperature has risen due to heat dissipation from the engine 4 in the motor section 5 to generate conveying air, which is then supplied to the left and right delivery sections 22. Four fertilizer application hoses 25 extend from the left and right delivery sections 22 toward the seedling planting device 9. The four fertilizer application hoses 25 extending from the left delivery section 22 are distributed and connected to four furrow fertilizer applicators 26 provided separately on the sides of the four left seedling planting mechanisms 14, and the four fertilizer application hoses 25 extending from the right delivery section 22 are distributed and connected to four furrow fertilizer applicators 26 provided separately on the sides of the four right seedling planting mechanisms 14.

[0036] The delivery unit 22 delivers fertilizer from the tank 21 to the fertilizer application hose 25 using the air carried by the blower 23. The furrowing fertilizer applicator 26 forms furrows in the field to the sides of the planted seedlings and supplies fertilizer from the fertilizer application hose 25 to the furrows.

[0037] [Configuration of agricultural material supply equipment] 1 and 2, agricultural material supply devices A are provided at the left and right rear portions of the traveling body 3. The left agricultural material supply device A is used when supplying fertilizer to the tank 21 in the left agricultural material supply section 20, and the right agricultural material supply device A is used when supplying fertilizer to the tank 21 in the right agricultural material supply section 20.

[0038] As shown in Figures 3 and 4, the left and right agricultural material supply devices A are equipped with a supply member 30 that loads fertilizer by placing a fertilizer bag H containing fertilizer on it, a lifting device 40 that raises and lowers the supply member 30, a posture adjustment mechanism 60 that adjusts the posture of the supply member 30, a clamping mechanism 70 that fixes the fertilizer bag H to the supply member 30, and a discharge mechanism 80 that discharges the fertilizer bag H from the supply member 30.

[0039] [Configuration of supplying member] 3, 4, and 5, the supply member 30 includes a bottom mounting portion 31 on which the bottom of the fertilizer bag H is placed, and an upper mounting portion 32 that extends upward from the bottom mounting portion 31 and on which the portion of the fertilizer bag H above the bottom is placed. The upper mounting portion 32 includes vertical support rods 33 that extend upward from both lateral sides of the bottom mounting portion 31, and a horizontal support rod 34 that connects the middle portions of the left and right vertical support rods 33.

[0040] [Configuration of the lifting device] 6, 11, and 12, a loading position N where fertilizer is loaded by placing the fertilizer bag H on the supply member 30 is set in a front lower portion of the tank 21, a material loading position S where fertilizer is loaded from the fertilizer bag H into the tank 21 is set in a front upper portion of the tank 21, and a bag unloading position O where the fertilizer bag H is unloaded from the supply member 30 is set in a position lower than the loading position N. The loading position N is set in a position close to the work step 3b of the traveling body 3.

[0041] The lifting device 40 is configured to raise the supply member 30 from the loading position N to the material input position S, to lower the supply member 30 from the material input position S to the bag unloading position O, and to raise the supply member 30 from the bag unloading position O to the loading position N. The lifting device 40 lowers the supply member 30 from the material input position S to the bag unloading position O and raises it from the bag unloading position O to the loading position N, thereby lowering the supply member 30 from the material input position S to the bag unloading position O.

[0042] Specifically, as shown in Figures 3 and 4, the lifting device 40 includes a pair of left and right lifting guide rails 41 aligned in the width direction of the running body 3, a lift member 42 that supports the supply member 30 in a state where it can be raised and lowered on the left and right lifting guide rails 41, and an electric motor 43 that is supported by the lift member 42 and serves as a drive mechanism for raising and lowering the lift member 42 along the left and right lifting guide rails 41.

[0043] As shown in FIGS. 3, 4, and 5, the left and right lift guide rails 41 are supported by a first support frame 44 that supports the lower ends of the lift guide rails 41 and a second support frame 45 that supports the middle portions of the lift guide rails 41. The first support frame 44 is fixed to the work step 3b in a state where it connects the lower portions of the left and right lift guide rails 41. As shown in FIG. 1, the second support frame 45 is erected upward from the machine frame 3a. The lift guide rails 41 are supported on the second support frame 45 by connecting a connecting arm 46 extending rearward from the lift guide rails 41 with a support arm 47 extending forward from the second support frame 45, as shown in FIG.

[0044] As shown in Figures 3 and 5, the lift member 42 has left and right engagement portions 48 and a connecting member 49 connecting the left and right engagement portions 48. The left engagement portion 48 is engaged with the left lift guide rail 41 so that the lift member 42 can be raised and lowered, and the right engagement portion 48 is engaged with the right lift guide rail 41 so that the lift member 42 can be raised and lowered on the left and right lift guide rails 41. The left and right engagement portions 48 are engaged with the lift guide rails 41 so that the lift member 42 can be raised and lowered, as shown in Figures 3, 4, and 5, by rotatably providing left and right guide rollers 48a that sandwich the lift guide rail 41 from the left and right, and front and rear guide rollers 48b that sandwich the lift guide rail 41 from the front and rear, on the engagement portion 48. The guide rollers 48a are provided at two locations, above and below the engagement portion 48.

[0045] As shown in Figures 3, 4, and 5, the supply member 30 is supported by the lift member 42 by connecting the left connecting portion 35 of the connecting portions 35 provided on both lateral sides of the supply member 30 to the support portion 48c provided on the left engaging portion 48 of the lift member 42 with a connecting pin 50, and by connecting the right connecting portion 35 of the supply member 30 to the support portion 48c provided on the right engaging portion 48 of the lift member 42 with a connecting pin 50.

[0046] 3, 4, and 5, the left and right lift guide rails 41 are provided with rack gear portions 41a extending along the lift guide rails 41. A left pinion gear 51 engaging with the rack gear portion 41a of the left lift guide rail 41 and a right pinion gear 51 engaging with the rack gear portion 41a of the right lift guide rail 41 are rotatably supported by the lift member 42. The left and right pinion gears 51 are supported on the lift member 42 by rotatably supporting rotation support shafts 52 supporting the left and right pinion gears 51 on arm portions 48d extending from the left engagement portion 48 and arm portions 48d extending from the right engagement portion 48. A driven gear (not shown) provided on the rotation support shaft 52 meshes with an output gear (not shown) provided on the output portion 43a of the electric motor 43, thereby interlocking the electric motor 43 and the rotation support shaft 52.

[0047] In the lifting device 40, the supply member 30 is raised and lowered by the driving force of the electric motor 43. That is, when the electric motor 43 is driven, the rotary support shaft 52 is driven by the electric motor 43, and the left and right pinion gears 51 are driven by the rotary support shaft 52, and the lift member 42 is raised and lowered along the rack gear portion 41a by the driving force of the pinion gear 51, and the supply member 30 is raised and lowered by the lift member 42 along the lifting guide rail 41.

[0048] [Configuration of the attitude adjustment mechanism] The posture adjustment mechanism 60 is configured to adjust the posture of the supplying member 30 to an upward-facing holding posture so that the fertilizer bag H faces upward and holds the fertilizer when the supplying member 30 is located at the loading position N and ascends between the loading position N and the material charging position S, as shown in FIGS. 6 to 10. The posture adjustment mechanism 60 is configured to adjust the posture of the supplying member 30 to an upward-facing posture so that the fertilizer bag H, which is empty or still has fertilizer, faces upward when the supplying member 30 descends between the material charging position S and the bag unloading position O and when the supplying member 30 is located at the bag unloading position O, as shown in FIGS. 6 to 10 and 12. The posture adjustment mechanism 60 is configured to adjust the posture of the supplying member 30 to a tilted material charging posture so that the fertilizer bag H faces downward toward the tank 21 and charges the fertilizer into the tank 21, as shown in FIG. 11, when the supplying member 30 is located at the material charging position S.

[0049] Specifically, the axis P of the left and right connecting pins 50 is located on the same axis, and the supply member 30 is supported by the lift member 42 in a state in which it can swing between an upward position (holding position) and a material feeding position, with the axis P of the connecting pins 50 as the swing fulcrum.

[0050] As shown in FIGS. 3 and 5 , the attitude adjustment mechanism 60 includes left and right attitude adjustment guides 61 aligned in the width direction of the machine body, and a first attitude setting portion 62 and a second attitude setting portion 63 formed on left and right side portions of the supply member 30 corresponding to the left and right attitude adjustment guides 61, respectively. The upper ends of the left and right attitude adjustment guides 61 are connected by a connecting rod 64. The left and right attitude adjustment guides 61 are supported by the first support frame 44 and the lift guide rails 41 between the left and right lift guide rails 41. That is, as shown in FIG. 5 , the lower ends of the attitude adjustment guides 61 are connected to the first support frame 44, and the middle portions of the attitude adjustment guides 61 are connected to the lift guide rails 41 via connecting members 65. The first attitude setting portion 62 of the supply member 30 is formed on the vertical support rod 33. As shown in FIGS. 5 and 11, the second attitude setting portion 63 of the supply member 30 is formed on an arm portion 66 extending from the vertical support rod 33.

[0051] As shown in Figures 5 and 6, the left and right posture adjustment guides 61 have a transport guide portion 61a provided at the bottom of the posture adjustment guide 61 and an insertion guide portion 61b provided above the transport guide portion 61a.

[0052] 6 to 9, the transport guide portion 61a extends vertically along the lifting guide rail 41 in a side view. When the supply member 30 is located at the loading position N, and when the supply member 30 rises between the loading position N and the material input position S, the first attitude setting portion 62 and the second attitude setting portion 63 of the supply member 30 slidably abut against the transport guide portion 61a, and the transport guide portion 61a supports the first attitude setting portion 62 and the second attitude setting portion 63 to adjust the attitude of the supply member 30 to the holding attitude. As shown in FIGS. 5, 6, 7, etc., the transport guide portion 61a is configured so that an upper portion 61au of the transport guide portion 61a is biased rearward relative to a lower portion 61ad of the transport guide portion 61a. 9, while the supply member 30 is rising from the loading position N toward the material input position S, the first attitude setting part 62 changes from a state in which it slidably abuts the lower part 61ad to a state in which it slidably abuts the upper part 61au, and the supply member 30 swings about the axis P as a swing fulcrum, and the upper part 61au supports the first attitude setting part 62 to adjust the attitude of the supply member 30 to the second holding attitude. The second holding attitude of the supply member 30 is an inclined attitude in which the upper end side of the supply member 30 is lowered rearward relative to the first holding attitude of the supply member 30 when the lower part 61ad is adjusting its attitude.

[0053] 5 and 11, the input guide portion 61b extends rearward from the transfer guide portion 61a. As shown in Figures 10 and 11, as the supply member 30 rises from just before the material input position S to the material input position S, the second attitude setting portion 63 of the supply member 30 slidably abuts against the input guide portion 61b, causing the supply member 30 to swing around the axis P as a swing fulcrum, and when the supply member 30 is positioned at the material input position S, the input guide portion 61b supports the first attitude setting portion 62 and the second attitude setting portion 63 to adjust the attitude of the supply member 30 to the material input attitude.

[0054] When the supply member 30 descends between the material input position S and the bag unloading position O, the transfer guide portion 61a of the position adjustment guide 61 adjusts the position of the supply member 30 to an upward position, just as when the supply member 30 ascends between the loading position N and the material input position S. When the supply member 30 is located at the bag unloading position O, the transfer guide portion 61a of the position adjustment guide 61 adjusts the position of the supply member 30 to an upward position, just as when the supply member 30 is located at the loading position N.

[0055] [Configuration of clamping mechanism] The clamping mechanism 70 is configured to clamp the fertilizer bag H and fix it to the supply member 30 when the supply member 30 rises between the loading position N and the material input position S, when the supply member 30 is located at the material input position S, and when the supply member 30 descends between the material input position S and the bag unloading position O, and to release the clamping of the fertilizer bag H and release the fixation of the fertilizer bag H to the supply member 30 when the supply member 30 is located at the loading position N and the bag unloading position O.

[0056] The clamping mechanism 70 is configured so that the clamping force with which the fertilizer bag H is clamped when the supply member 30 rises to the material input position S beyond the intermediate raised position Z between the loading position N and the material input position S, and when the supply member 30 is located at the material input position S, is stronger than the clamping force with which the fertilizer bag H is clamped when the supply member 30 rises from the loading position N to the intermediate raised position Z.

[0057] Specifically, as shown in Figures 3 and 5, the clamping mechanism 70 includes a front clamping arm 71 and a rear clamping arm 72 supported by the supply member 30, and a clamping switching unit 73 provided on the first support frame 44, which is a fixed unit.

[0058] As shown in FIGS. 5 and 6 , the rear clamping arm 72 extends upward from the first support rod 74 and is fixedly supported by the first support rod 74. A bag holder 72a that clamps the fertilizer bag H placed on the supply member 30 is provided at the extended end of the rear clamping arm 72 and is positioned higher than the bottom mounting portion 31. The rear clamping arm 72 is supported by the first support rod 74 by connecting the support portion 74a provided on the first support rod 74 to the rear clamping arm 72 by welding. As shown in FIGS. 3 and 5 , the first support rod 74 is fixedly supported by the left and right connecting portions 35 of the supply member 30. The rear clamping arm 72 is fixedly supported by the supply member 30.

[0059] As shown in Figures 3, 5, and 6, the front clamping arm 71 is swingably supported on the second support rod 75 while extending upward from the second support rod 75. A bag holder 71a that clamps the fertilizer bag H placed on the supply member 30 is provided at the extended end of the front clamping arm 71 and is positioned higher than the bottom mounting part 31. The front clamping arm 71 is supported on the second support rod 75 by welding the front clamping arm 71 to a support member 76 that is swingably supported on the second support rod 75. The second support rod 75 is supported by arm portions 35a provided on the left and right connecting portions 35 of the supply member 30. The front clamping arm 71 is supported by the supply member 30 in a state in which it can swing between a clamping position (see FIGS. 7 and 8) in which the bag pressing portion 71a presses against the fertilizer bag H, with the axis X of the second support rod 75 as a swing fulcrum, and a clamp-release position (see FIGS. 6 and 12) in which the bag pressing portion 71a moves forward away from the fertilizer bag H. The front clamping arm 71 is biased to swing into the clamping position by a spring 77 connected to the front clamping arm 71 and the rear clamping arm 72.

[0060] 5 and 6, an operating arm 78 that swings the front clamping arm 71 is swingably supported by the supply member 30. The operating arm 78 is connected to the front clamping arm 71 so that it can swing integrally with the front clamping arm 71. Specifically, the operating arm 78 is formed integrally with the support member 76. The operating arm 78 is supported by the supply member 30 in a swingable state with the axis X of the second support rod 75 as the swing fulcrum.

[0061] In the clamping mechanism 70, as shown in FIG. 6, when the supply member 30 is located at the loading position N, the operating arm 78 comes into contact with the clamping switching unit 73 and is pushed by the clamping switching unit 73, and the front clamping arm 71 is swung against the spring 77 to a clamping release position by the operation of the operating arm 78 by the clamping switching unit 73, thereby entering a clamping release state in which the clamping of the fertilizer bag H between the front clamping arm 71 and the rear clamping arm 72 is released.

[0062] In the clamping mechanism 70, as shown in FIG. 7 , when the supply member 30 is located at an intermediate raised position Z between the loading position N and the material input position S, even if the operating arm 78 abuts against the clamping switchover part 73, the axis X, which is the swing fulcrum of the operating arm 78, is raised relative to the clamping switchover part 73 compared to when the supply member 30 is located at the loading position N, and the front clamping arm 71 is operated by the spring 77 to a clamping position and pressed against the fertilizer bag H, resulting in a clamping state in which the fertilizer bag H is clamped between the front clamping arm 71 and the rear clamping arm 72.

[0063] In the clamping mechanism 70, as shown in FIGS. 8 to 11, when the supply member 30 passes the intermediate raised position Z and rises to the material charging position S, and when the supply member 30 is located at the material charging position S, the operating arm 78 moves away from the clamping switching unit 73, and the front clamping arm 71 is swung by the spring 77 to the clamping position and pressed against the fertilizer bag H, thereby entering a clamping state in which the fertilizer bag H is clamped between the front clamping arm 71 and the rear clamping arm 72.

[0064] As shown in FIG. 7 , when the supplying member 30 is located at the intermediate raised position Z, the operating arm 78 abuts against the clamping switchover portion 73, and the swinging bias of the spring 77 on the front clamping arm 71 is restricted by the clamping switchover portion 73. On the other hand, as shown in FIG. 8 and other figures, when the supplying member 30 rises beyond the intermediate raised position Z, the operating arm 78 disengages from the clamping switchover portion 73, and the swinging bias of the spring 77 on the front clamping arm 71 is not restricted. In the clamping mechanism 70, the clamping force on the fertilizer bag H when the supplying member 30 rises beyond the intermediate raised position Z to the material charging position S and the clamping force on the fertilizer bag H when the supplying member 30 is located at the material charging position S are made stronger than the clamping force on the fertilizer bag H when the supplying member 30 rises from the loading position N to the intermediate raised position Z.

[0065] In the clamping mechanism 70, as shown in FIG. 6, when the supply member 30 is located at the loading position N, the clamping switch 73 is operated to a released state to allow the fertilizer bag H to be loaded onto the supply member 30. As shown in FIGS. 7 to 11, when the supply member 30 is raised from the loading position N to the material charging position S and when the supply member 30 is located at the material charging position S, the clamping switch 73 and the spring 77 are operated to a clamping state to fix the fertilizer bag H to the supply member 30.

[0066] In the clamping mechanism 70, when the supply member 30 is raised to the material input position S beyond the intermediate raised position Z, and when the supply member 30 is located at the material input position S, the fertilizer bag H is firmly fixed to the supply member 30 by a clamping force stronger than the clamping force when the supply member 30 is raised from the loading position N to the intermediate raised position Z.

[0067] In the clamping mechanism 70, when the supply member 30 is lowered between the material input position S and the bag unloading position O, the front clamping arm 71 is operated by the spring 77 to the clamping position, and the fertilizer bag H is clamped between the front clamping arm 71 and the rear clamping arm 72, similar to when the supply member 30 is raised between the loading position N and the material input position S, and the fertilizer bag H is in a clamped state so as to fix the fertilizer bag H to the supply member 30. When the supply member 30 is located at the bag unloading position O, the front clamping arm 71 is operated by the clamping switch unit 73 to the clamping release state, and the clamping of the fertilizer bag H between the front clamping arm 71 and the rear clamping arm 72 is released, similar to when the supply member 30 is located at the loading position N, and the clamping release state is established so that the fertilizer bag H can be discharged from the supply member 30.

[0068] [Configuration of the discharge mechanism] The discharge mechanism 80 is configured to discharge the fertilizer bag H from the supply member 30 when the supply member 30 is lowered to the bag-lowering position O.

[0069] Specifically, as shown in FIGS. 3 and 5, the discharge mechanism 80 includes a discharge arm 81 supported by the supply member 30, and a discharge switching unit 82 provided on the first support frame 44, which is a fixed unit.

[0070] 5 and 12, the discharge arm 81 is swingably supported by the second support rod 75 while extending upward from the second support rod 75. The discharge arm 81 is supported by the second support rod 75 by welding the discharge arm 81 to a support member 83 swingably supported by the second support rod 75.

[0071] 5 and 12, an operating arm 84 that swings the discharge arm 81 is swingably supported by the supply member 30. The operating arm 84 is connected to the discharge arm 81 so that it can swing integrally with the discharge arm 81. Specifically, the operating arm 84 is formed integrally with the support member 83. The operating arm 84 is supported by the supply member 30 in a swingable state with the axis X of the second support rod 75 as the swing fulcrum.

[0072] As shown in FIG. 12, in the discharge mechanism 80, when the supply member 30 is located at the bag-lowering position O, the operating arm 84 comes into contact with the discharge switching unit 82, and the discharge switching unit 82 pushes the operating arm 84, causing the discharge arm 81 to swing to the discharge position, thereby putting the discharge mechanism 80 into an operating state in which the fertilizer bag H placed on the supply member 30 is pushed out of the supply member 30 by the discharge arm 81 and discharged.

[0073] As shown in FIGS. 6 to 11 , when the supply member 30 is located at the loading position N, when the supply member 30 is raised from the loading position N to the material input position S, and when the supply member 30 is located at the material input position S, the discharge mechanism 80 allows the operating arm 84 to disengage from the discharge switching unit 82 and the discharge arm 81 to be retracted behind the supply member 30 by the weight of the fertilizer bag H and to be operated to an action-released position supported by the stopper 85.

[0074] As shown in Fig. 13, a control device 90 that controls the agricultural material supply device A is connected to the electric motor 43. As shown in Fig. 13, the control device 90 includes a control unit 92 that is connected to a drive unit 91 of the electric motor 43. An up switch 93, a down switch 94, an up detection mechanism 95, and a down detection mechanism 96 are connected to the control unit 92.

[0075] When the rise switch 93 is turned on, the control unit 92 operates the drive unit 91 based on information from the rise switch 93 to drive the electric motor 43 in the upward direction, thereby raising the supply member 30.After this, when the rise detection mechanism 95 detects that the supply member 30 has reached the material input position S, the control unit 92 operates the drive unit 91 based on the detection information from the rise detection mechanism 95 to stop the electric motor 43, thereby stopping the rise of the supply member 30.

[0076] When the lowering switch 94 is turned on, the control unit 92 operates the drive unit 91 based on information from the lowering switch 94 to drive the electric motor 43 downward, thereby lowering the supply member 30, and thereafter, when the lowering detection mechanism 96 detects that the supply member 30 has reached the bag unloading position O, the control unit 92 operates the drive unit 91 based on the detection information from the lowering detection mechanism 96 to stop the electric motor 43, thereby stopping the descent of the supply member 30. The detection by the lifting detection mechanism 95 that the supply member 30 has reached the material input position S, and the detection by the lowering detection mechanism 96 that the supply member 30 has reached the bag unloading position O, are performed by detecting the position of the lift member 42 on the lifting guide rail 41.

[0077] To supply fertilizer using the agricultural material supply device A, the lid 21a of the tank 21 is opened as shown in Fig. 11. As shown in Fig. 6, the supply member 30 is positioned at the loading position N. Then, the clamping switcher 73 operates the operating arm 78 to move the front clamping arm 71 to the clamp release position, placing the clamping mechanism 70 in the clamp release state. The fertilizer bag H with the discharge port 29 opened is placed on the supply member 30, and the fertilizer is loaded into the supply member 30. Even though the discharge arm 81 is in the operating position, the operating arm 84 is spaced apart from the discharge switcher 82, and the weight of the fertilizer bag H causes the discharge arm 81 to move to the operating release position. When the lift switch 93 is turned on, the control unit 92 operates based on information from the lift switch 93, and the electric motor 43 is driven to move upward. As shown in FIGS. 7 to 11, the lift member 42 is raised by the power of the electric motor 43, and the supply member 30 is raised. The supply member 30 is raised while its position is adjusted to the holding position by the position adjustment mechanism 60, and the fertilizer bag H is lifted and conveyed. As shown in Fig. 7, until the supplying member 30 is raised to the intermediate raised position Z, the operating arm 78 abuts against the clamping switchover unit 73, and the front clamping arm 71 is operated by the spring 77 to the clamping position, so that the clamping mechanism 70 is in the clamping state. After the supplying member 30 passes the intermediate raised position Z, as shown in Figs. 8 to 11, the operating arm 78 moves away from the clamping switchover unit 73, and the front clamping arm 71 is operated by the spring 77 to the clamping position, so that the clamping mechanism 70 is in the clamping state. The fertilizer bag H is clamped by the clamping mechanism 70 and fixed to the supplying member 30, and is then lifted and conveyed. When the supplying member 30 is raised after passing the intermediate raised position Z, the fertilizer bag H is lifted and conveyed while being firmly fixed to the supplying member 30 by the clamping force of the clamping mechanism 70, which is stronger than when the supplying member 30 is raised to the intermediate raised position Z. When the supply member 30 is positioned at the material input position S, the control unit 92, which operates based on detection information from the ascent detection mechanism 95, stops the electric motor 43, stopping the ascent of the supply member 30. The attitude of the supply member 30 is then adjusted to the material input attitude by the attitude adjustment mechanism 60, the fertilizer bag H is tilted toward the tank 21, the fertilizer contained in the fertilizer bag H is discharged, and the fertilizer is input from the supply member 30 to the tank 21.At this time, the front clamping arm 71 is operated to a clamping position by the spring 77, the clamping mechanism 70 is in a clamping state, and the fertilizer bag H is fixed to the supply member 30 by the clamping mechanism 70 even if it falls toward the tank 21.

[0078] When the supply of fertilizer to the tank 21 is completed, the lowering switch 94 is turned on. Then, based on information from the lowering switch 94, the control unit 92 operates to drive the electric motor 43 downward, and the lift member 42 is lowered by the power of the electric motor 43. The position of the supply member 30 is adjusted from the material-feeding position to the holding position by the position adjustment mechanism 60, and is then lowered while being adjusted to the holding position by the position adjustment mechanism 60, so that the fertilizer bag H is lowered and conveyed in an upward position. Similar to when the fertilizer bag H is conveyed upward, the front clamping arm 71 is operated by the spring 77 to the clamping position, so that the clamping mechanism 70 is in a clamping state, and the fertilizer bag H is conveyed downward while being fixed to the supply member 30 by the clamping mechanism 70. When the supply member 30 is located at the bag-unloading position O, the control unit 92, which operates based on information detected by the descent detection mechanism 96, stops the electric motor 43, stopping the lowering operation of the supply member 30 and stopping the downward conveyance of the fertilizer bag H. As shown in FIG. 12, when the supply member 30 is located at the bag-lowering position O, the operating arm 78 of the front clamping arm 71 comes into contact with the clamping switching unit 73, and the clamping switching unit 73 pushes the operating arm 78, thereby operating the front clamping arm 71 to the clamp-release position, and the clamping mechanism 70 enters the clamp-release state.Then, the operating arm 84 of the discharge arm 81 comes into contact with the discharge switching unit 82, and the discharge switching unit 82 pushes the operating arm 84, thereby operating the discharge arm 81 to the working position, and the fertilizer bag H is pushed out of the supply member 30 by the discharge arm 81 and discharged.

[0079] [Another embodiment] (1) In the above embodiment, the fertilizer is loaded into the supplying member 30 while still in the fertilizer bag H, and then the fertilizer is discharged from the fertilizer bag H into the tank 21 at the material charging position S. However, the present invention is not limited to this. The supplying member 30 may be configured as a container capable of containing fertilizer, and the fertilizer may be removed from the fertilizer bag H and loaded into the supplying member 30, and then discharged from the supplying member 30 into the tank 21 at the material charging position S. In this case, unlike in the case where the fertilizer bag H is mounted on the supplying member 30, there is no need to recover the fertilizer bag H, and there is no need to provide the discharge mechanism 80. Therefore, the lifting device 40 may simply lift the supplying member 30 between the loading position N and the material charging position S.

[0080] (2) In the above embodiment, the agricultural material supply device A is configured for use with a rice transplanter, but this is not limiting and the agricultural material supply device A may be configured for use with various types of work vehicles, such as direct seeding machines and dedicated fertilizer applicators. Furthermore, the agricultural material supply device A may not be provided on a work vehicle, but may be configured separately from the work vehicle.

[0081] (3) In the above embodiment, an example was shown in which the clamping mechanism 70 was provided, but this is not limited to this. Instead of the clamping mechanism 70, a band or the like for fixing the material bag to the supply member 30 may be provided.

[0082] (4) In the above embodiment, an example was shown in which a clamping mechanism 70 was used in which the clamping force after passing the intermediate raised position Z becomes stronger than before passing the intermediate raised position Z, but a clamping mechanism in which the clamping force does not change may also be used.

[0083] (5) In the above-described embodiment, an example in which the discharge mechanism 80 is provided is shown, but the discharge mechanism 80 may not be provided. In the case in which the discharge mechanism 80 is not provided, the loading position and the bag unloading position of the supply member 30 may be set to the same position.

[0084] (6) In the above embodiment, an example was shown in which an agricultural material supply unit 20 that supplies fertilizer was adopted, but this is not limited to this. For example, an agricultural material supply unit that supplies various agricultural materials other than fertilizer, such as chemicals, may also be adopted. [Industrial Applicability]

[0085] The present invention relates to a work vehicle equipped with an agricultural material supply unit having a tank for storing agricultural materials and a delivery unit for delivering the agricultural materials from the tank and delivering the delivered agricultural materials to a field. Suitable for Can be used. [Explanation of symbols]

[0086] 20. Agricultural Materials Supply Department 21 Tank 22 Feeding section 30 Supply material 40 Lifting device (transport device) 41 Lifting guide rail 42 Lifting member 43 Drive mechanism (electric motor) 44 Fixed part (first support frame) 60 Posture adjustment mechanism 61 Posture Adjustment Guide 70 Clamping mechanism 71 Clamping arm (front clamping arm) 73 Clamping switch section 77 Spring 78 Operating Arm 80 Ejection mechanism 81 Ejection arm 82 Discharge switching unit 84 Operating arm Agricultural material supply device H Material bag (fertilizer bag) N Loading position O Bag unloading position S Material input position Z intermediate rising position

Claims

1. A work vehicle equipped with an agricultural material supply unit having a tank for storing agricultural materials and a delivery unit for delivering the agricultural materials from the tank and delivering the delivered agricultural materials to a field, and equipped with an agricultural material delivery device used when delivering the agricultural materials to the tank, The agricultural material supply device is provided forward of the tank, The agricultural material supply device is A supply member for loading agricultural materials; a conveying device that conveys the supplying member between a loading position where agricultural materials are loaded onto the supplying member and a material input position where the supplying member is conveyed from the loading position toward the tank and the agricultural materials are input into the tank; an attitude adjustment mechanism that adjusts the attitude of the supply member, The attitude adjustment mechanism adjusts the attitude of the supply member to a holding attitude in which the agricultural materials loaded on the supply member are held by the supply member when the supply member is located at the loading position and when the supply member is transported from the loading position to the material input position, and is configured to adjust the attitude of the supply member to a material input attitude in which the agricultural materials are input into the tank when the supply member is located at the material input position.

2. 2. The work vehicle according to claim 1, wherein the attitude adjustment mechanism is configured to adjust the attitude of the supply member to the holding attitude when the supply member is transported from the material input position to the loading position.

3. 3. The work vehicle according to claim 1, wherein the supply member is configured to load agricultural materials in a material bag.

Images