JP7392783B2 - work vehicle - Google Patents

Description

The present invention relates to a work vehicle such as a seedling transplanter that has a planting device connected to the rear of the vehicle body for planting seedlings in a field, and belongs to the technical field of agricultural machinery.

Among the seedling transplanting machines equipped with a seedling planting device at the rear of the machine body, there is known a seedling transplanting machine that is equipped with a spare seedling mounting part consisting of a plurality of spare seedling mounting stands on the side of the machine body.

Patent Document 1 below discloses a stacked state in which a plurality of preliminary seedling mounting stands are stacked vertically and overlapped in plan view, and a deployed state in which the plurality of preliminary seedling mounting stands are expanded in a substantially straight line in the front and back direction. discloses a seedling transplanter in which the plurality of preliminary seedling mounting stands are configured to be switchable. This switching mechanism attaches a plurality of spare seedling stands to a parallel link mechanism consisting of one long movable link member and two short movable link members. The configuration is such that the state of the preliminary seedling stand can be switched between a stacked state in which the seedlings are stacked on top of each other and a state in which they are lined up substantially in a straight line in the front-back direction (a deployed state in which they are lined up in the horizontal direction).

Then, when any one of the movable spare seedling stands is changed from the stacked state to the unfolded position with respect to the fixed spare seedling stand, the plurality of spare seedling stands are in the unfolded state. Conversely, if any one of the movable spare seedling stands is changed from the expanded state to the stacked position relative to the fixed spare seedling stand, the multiple spare seedlings are The configuration is such that the platforms can be switched to an overlapping state.

Therefore, the configuration described in Patent Document 1 can easily and quickly switch the states of the plurality of spare seedling stands, and can improve the workability of switching the states of the plurality of spare seedling stands compared to the prior art.

Further, a case is provided in which the seedling box described in Patent Document 2 can be temporarily placed.

Japanese Patent Application Publication No. 2012-205504 Japanese Patent Application Publication No. 2014-87276

A case is provided to hold seedling boxes, and the structure is designed to prevent them from falling from the aircraft due to vibrations or wind.

However, no consideration is given to frequently taking seedling boxes in and out of the case.

In addition, an auxiliary worker performs replenishment work from the ridge, but there is a problem in that it is difficult to collect the seedling boxes placed in the case from the ridge.

In view of the above-mentioned problems of the conventional work vehicle, the present invention aims to provide a seedling transplanter that is provided with a case that is easy to take in and take out, and that can retrieve seedling boxes placed in the case even from the edge of a ridge.

In order to solve the above problem, the invention of claim 1 includes a seedling box (68) or a plurality of spare seedling frames (38) for placing seedlings on a support frame (49) provided on the traveling vehicle body (2). The seedling transplanter is provided with a seedling box mounting member (101) for placing the seedling boxes (68) on the plurality of spare seedling frames (38), and the seedling box mounting member (101) is mounted on the plurality of spare seedling frames (38). The seedling box (68) provided on the outside or inside of the body of 38) and placed on the seedling box mounting member (101) is supported in an oblique attitude toward the outside of the machine, and the seedling box (68) is mounted on the seedling box mounting member (101). Among the structural members, the front and rear sides of the bottom part supporting the seedling box (68) are bent upward, and the seedling box mounting member (101) is provided in each of the plurality of spare seedling frames (38). The seedling box mounting members (101) are arranged in a take-out state (101b) in the longitudinal direction of the machine body, or the plurality of seedling box mounting members (101) are arranged in the vertical direction of the machine body in an overall moving state (101a). It was used as a seedling transplanter.

The invention of claim 2 provides a seedling box mounting member (101) located above the machine body when the plurality of seedling box mounting members (101) are in the overall moving state (101a) is a lower seedling box mounting member (101). The seedling transplanter according to claim 1, wherein the seedling transplanter plays a role of preventing the seedling box (68) placed on the seedling box from falling.

In the invention according to claim 3, when the plurality of seedling box mounting members (101) are in the unloading state (101b), the seedling box mounting member (101) located at the rear of the machine body is a seedling box mounting member located at the front of the machine body. The seedling transplanter according to claim 1 or 2, wherein the seedling transplanter is located above (101).

According to the invention described in claim 1, by providing the seedling box mounting member (101) on which the seedling box (68) is placed on the side of the preliminary seedling frame (38), the seedling box (68) can be taken in and out from the outside of the machine. Because it is easy to remove, field workers working near the ridge can collect the seedling boxes.

In addition, since the seedling box (68) is supported in an oblique position toward the outside of the aircraft, it can be prevented from coming into contact with the seedling box mounting member (101), so damage to the seedling box (68) can be prevented. can.

In addition, by bending the front and rear sides of the bottom of the machine that supports the seedling box (68) upward, the seedling box (68) can fall from the seedling box mounting member (101) due to vibrations of the machine or while driving on a slope. can be prevented from happening.

In addition, by configuring the take-out state (101b) in which a plurality of seedling box mounting members (101) are lined up in the longitudinal direction of the machine, the seedling box (68) can be slid in the longitudinal direction of the machine. But the seedling box (68) is easy to collect.

According to the present invention as set forth in claim 2, in addition to the effects of the invention as set forth in claim 1, the seedling box (68) may fall from the seedling box mounting member (101) due to vibration of the aircraft body or while traveling on a slope. This can be prevented.

According to the present invention as set forth in claim 3, in addition to the effects of the invention as set forth in claim 1 or 2, the seedling box (68) is guided toward the front side of the machine by the positional relationship of the plurality of seedling box mounting members (101). Since the seedling box (68) is easily collected from the ridge, it is easy to collect the seedling box (68).

1 is a side view of a riding-type rice transplanter according to an embodiment of the present invention. FIG. 2 is a plan view of the riding rice transplanter shown in FIG. 1. FIG. FIG. 2 is a side view of the riding-type rice transplanter shown in FIG. 1 in which the spare seedling mounting stands are arranged in three tiers (in a stacked state); FIG. 2 is a simplified side view of the riding-type rice transplanter shown in FIG. 1 in which the preliminary seedling mounting stands are arranged in three tiers (in a stacked state); FIG. 2 is a side view of the riding-type rice transplanter shown in FIG. 1 when the spare seedling mounting bases are arranged on the same plane (in an unfolded state). FIG. 2 is a simplified side view of the riding-type rice transplanter shown in FIG. 1 when the spare seedling mounting bases are arranged on the same plane (in an unfolded state). FIG. 2 is a plan view of the riding-type rice transplanter shown in FIG. 1 when the spare seedling mounting bases are arranged on the same plane (in an unfolded state). FIG. 2 is an operation control block diagram of a spare seedling platform of the riding rice transplanter of FIG. 1. FIG. FIG. 9 is a simplified side view showing a stacked state (FIG. 9(a)) and an expanded state (FIG. 9(b)) of a spare seedling mounting stand of the riding-type rice transplanter of FIG. 1. FIG. They are a plan view (FIG. 10(a)) of a switching drive device of a spare seedling mounting stand of the riding-type rice transplanter of FIG. 1 and an internal structure diagram (FIG. 10(b)) of the switching drive device. FIG. 2 is a plan view of a switching drive device for a spare seedling platform of the riding-type rice transplanter shown in FIG. 1; A side view (FIG. 12(a), FIG. 12(b)) and a plan view (FIG. 12(c)) of the spare seedling platform of the riding-type rice transplanter shown in FIG. 1, and an enlarged view of the front protrusion of the preliminary seedling platform. (FIG. 12(d)). A side view (FIG. 13(a)) showing the state of overall movement of the seedling box mounting member and a side view (FIG. 13(b)) showing the state of individual movement of the seedling box mounting member. Front view showing the state of individual movement of seedling box mounting members

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIGS. 1 and 2 are a side view and a plan view of a riding-type rice transplanter equipped with a fertilization device as a granular material delivery device, which is a typical example of the seedling transplanter of the present invention. This riding-type rice transplanter 1 with a fertilization device has a seedling planting section 4 mounted on the rear side of a traveling vehicle body 2 via an elevating link device 3 so as to be able to be raised and lowered, and a main body portion of a fertilization device 5 on the rear upper side of the traveling vehicle body 2. is provided. When the onboard operator faces the forward direction of the riding rice transplanter, the left and right directions are called left and right, respectively, and the forward and backward directions are called forward and rear, respectively.

The traveling vehicle body 2 is a four-wheel drive vehicle equipped with a pair of left and right front wheels 10, 10 as drive wheels and a pair of left and right rear wheels 11, 11 (traveling device), and a transmission case 12 is disposed at the front of the vehicle body. front wheel final cases 13, 13 are provided on the left and right sides of the transmission case 12, and left and right front wheels protrude outward from respective front wheel support parts that can change the steering direction of the left and right front wheel final cases 13, 13. Left and right front wheels 10, 10 are respectively attached to the axle. The front end of the main frame 15 is fixed to the back of the transmission case 12, and the rear gear case 18, 18 is supported so as to be freely rolling, and rear wheels 11, 11 are attached to rear wheel axles that protrude outward from rear wheel gear cases 18, 18.

The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the mission case 12 via a belt transmission 21 and a hydraulic continuously variable transmission (HST) 23. The rotational power transmitted to the transmission case 12 is shifted by a transmission within the case 12, and then separated into traveling power and externally extracted power. A portion of the running power is transmitted to the front wheel final cases 13, 13 to drive the front wheels 10, 10, and the rest is transmitted to the rear wheel gear cases 18, 18 to drive the rear wheels 11, 11. In addition, the external power is transmitted to a planting clutch case 25 provided at the rear of the traveling vehicle body 2, and then transmitted to the seedling planting section 4 by a planting transmission shaft 26, and is also transmitted to the fertilization device 5 by a fertilization transmission mechanism 28. transmitted to.

The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed on top of the engine cover 30. In front of the seat 31 is a front cover 32 that houses various operating mechanisms, and above it is provided a handle 34 for steering the front wheels 10, 10, and this area is referred to as a steering section 33. Horizontal floor steps 35 are formed on both left and right sides of the lower ends of the engine cover 30 and the front cover 32. Part of the floor step 35 is shaped like a grid (see FIG. 2), so that mud stuck to the shoes of workers walking on the step 35 falls onto the field. The rear part above the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

The elevating link device 3 is a parallel link mechanism, and includes one upper link 40 and a pair of left and right lower links 41, 41. The base sides of these links 40, 41, 41 are rotatably attached to a link base frame 42 in the form of a portal from the back, which stands upright at the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. A connecting shaft 44 rotatably supported by the seedling planting section 4 is inserted and connected to the lower end of the vertical link 43, and the seedling planting section 4 is connected to the connecting shaft 44 so as to be able to roll freely.

An elevating hydraulic cylinder 46 is provided between a support member (not shown) fixed to the main frame 15 and the tip of a swing arm (not shown) integrally formed with the upper link 40. By expanding and contracting with hydraulic pressure, the upper link 40 rotates up and down, and the seedling planting section 4 moves up and down while maintaining a substantially constant posture.

The seedling planting section 4 has a six-row planting configuration, with a transmission case 50 that also serves as a frame, a mat on which the seedlings are placed and reciprocated from side to side to supply the seedlings one by one to the seedling outlet 51a of each row and in a row horizontally. When all of the seedlings are supplied to the seedling outlet 51a,..., the seedling table 51 transports the seedlings downward by the seedling conveying belt 51b,..., and the seedlings are planted in the field with the seedlings supplied to the seedling outlet 51a,... The attachment device 52, . . . is equipped with a pair of left and right line drawing markers 75 (FIG. 1) for drawing a line on the topsoil surface to indicate the aircraft course for the next stroke.

At the lower part of the seedling planting section 4, a center float 55 is provided at the center, and side floats 56, 56 are provided on both sides of the center float 55, respectively. When the aircraft moves forward with these floats 55, 56, 56 in contact with the muddy surface of the field, the floats 55, 56, 56 slide while leveling the muddy surface, and the seedling planting device 52, Seedlings are planted by... Each of the floats 55, 56, and 56 is rotatably attached so that the front end side moves up and down according to the unevenness of the topsoil surface of the field, and during planting work, the up and down movement of the front part of the center float 55 is detected by the angle of attack control sensor. (not shown), and depending on the detection result, a hydraulic valve (not shown) that controls the lifting hydraulic cylinder 46 is switched to raise and lower the seedling planting section 4, thereby increasing the planting depth of the seedlings. is always kept constant.

The fertilization device 5 dispenses a fixed amount of granular fertilizer stored in a fertilizer hopper 60 by a dispensing unit 61,..., and transfers the fertilizer to a fertilizer attached to both left and right sides of floats 55, 56, 56 with fertilization hoses 62,... The fertilizer is guided to a guide (not shown), and is dropped into a fertilization area formed near the side of the seedling planting row by a groove forming member 76 (Fig. 1), provided in front of the fertilizer guide,... ing. Air generated by a blower 58 driven by a blower electric motor 53 is blown into the fertilizing hoses 62,... through a horizontally long air chamber 59, and the fertilizer in the fertilizing hoses 62,... is forced by wind pressure. It is designed to be transported to

A rotor 27 (the combination of the first rotor 27a and the second rotor 27b is sometimes simply referred to as the rotor 27), which is an example of a soil leveling device, is attached to the seedling planting section 4. Further, the seedling platform 51 is configured to slide in the left-right direction using support rollers 65a of a rectangular support frame 65 that supports the entire seedling planting section 4 and has a full width in the left-right and up-down directions as rails.

In addition, on both left and right sides of the front part of the traveling vehicle body 2, a pair of spare seedling platforms 38, 38 on which seedlings for supply are placed can be rotated between a position protruding from the front and rear of the vehicle body and a position in which they are lined up vertically. It is provided.

FIG. 3 shows a side view when the first preliminary seedling mounting table 38a, the second preliminary seedling loading table 38b, and the third preliminary seedling loading table 38c on one side of the machine are arranged in three upper and lower stages, and a simplified side view is shown in FIG. Shown in Figure 4. Further, FIG. 5 shows a side view when the first preliminary seedling table 38a, second preliminary seedling table 38b, and third preliminary seedling table 38c are arranged on the same plane, and FIG. 6 shows a simplified side view.

The spare seedling platform 38 is supported by a support frame 49 whose base side is disposed below the floor step 35 of the traveling vehicle body 2, and is configured into three upper and lower stages via movable link members 39a, 39b, and 39c. It consists of a preliminary seedling mounting table 38a, a second preliminary seedling mounting table 38b, and a third preliminary seedling mounting table 38c.

A first support frame 37a, a second support frame 37b, and a third support frame are integrally formed on the bottom surfaces of the first preliminary seedling platform 38a, the second preliminary seedling platform 38b, and the third preliminary seedling platform 38c, respectively. A body 37c is attached, and rotating shafts 39a1 and 39a2 at both ends of the first moving link member 39a are rotatably attached to the center part of the first support frame 37a and the front end of the second support frame 37b, respectively. Rotating shafts 39b1 and 39b2 at both ends of the second moving link member 39b are rotatably connected to the rear end of the first support frame 37a and the front end of the third support frame 37c, respectively. Rotation shafts 39c1 and 39c2 at both ends of the third movable link member 39c are rotatably connected to the rear end of the second support frame 37b and the center of the third support frame 37c.

The outer peripheral portions of the rotation shafts 39a2, 39b1, 39b2, and 39c1 are attached to the support frames 37a, 37b, and 37c by welding. Support pieces (not shown) of the movable link members 39a, 39b, 39c are attached to insertion portions (not shown) of the rotation shafts 39a2, 39b1, 39b2, 39c1 welded to the support frames 37a, 37b, 37c. Insert and attach.

Moreover, a rotation fulcrum 37b1 is provided at approximately the center of the second movable link member 39b and approximately at the center of the second support frame 37b, so that they are rotatable relative to each other.

Further, the support frame 49 is provided with two front and rear branch struts 49a, 49b, and the tops of the branch struts 49a, 49b reach close to the bottom surface of the second support frame 37b. A rotation shaft 39b3 provided near the center of the second movable link member 39b is provided near the top of the front branch column 49a, and the second movable link member 39b rotates around the rotation shaft 39b3. It is rotatable around 49a. The rotation shaft 39b3 is provided on the second movable link member 39b below the rotation fulcrum 37b1. Further, a rotation shaft 39c3 provided near the rear end of the third movable link member 39c is provided near the top of the rear branch column 49b, and the third movable link member 39b is rotated rearward about the rotation shaft 39c3. It is rotatable around the side branch column 49b. The rotation shaft 39c3 is provided on the third moving link member 39c below the rotation shaft 39c1.

The second preliminary seedling platform 38b is not fixed to the front branch support frame 49a and the rear support frame 49b, which are body members, and the second movable link member 39b moves the rotation fulcrum 39b3 from the state shown in FIG. When it rotates around the center and reaches the state shown in FIG. 5, the rotation fulcrum 39b3 is located below the rotation axis 37b1 on the side surface of the central part of the second preliminary seedling mounting stand 38b, so it is placed before the position shown in FIG. A second preliminary seedling mounting table 38b is arranged nearby. At this time, when the third movable link member 39c also rotates from the state shown in FIG. 3 to the state shown in FIG. It is placed closer to the front than the position shown.

Therefore, as shown in the plan view of FIG. 7, if the first preliminary seedling platform 38a, the second preliminary seedling platform 38b, and the third preliminary seedling platform 38c are expanded on almost the same plane, a wide seedling box 68, etc. When trying to obtain a mounting plane of 1, these three preliminary seedling mounting stands 38a, 38b, and 38c can be moved closer to the front than before, and the front end of the machine body can be made to protrude outside the field. For example, it becomes easier to load seedlings from a truck or the like onto the preliminary seedling platforms 38a, 38b, and 38c at the edge of a ridge.

In addition, as shown in the plan view of FIG. 7, a pair of front protrusions 38a1, 38b1, 38c1 protrude forward at both front ends of the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c. Rear protrusions 38a2, 38b2, and 38c2 are respectively formed at the center of the rear end and protrude rearward. Therefore, when the first, second, and third spare seedling stands 38a, 38b, and 38c are in the unfolded configuration, the rear protrusions 38a2, 38b2 of the spare seedling stands 38a, 38b located on the front side of the machine are located on the rear side of the machine. It will be arranged at a position that overlaps the front side protrusions 38b1, 38c1 of the preliminary seedling mounting tables 38b, 38c located therein in a side view. Therefore, when the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are in the deployed configuration in which they are lined up in the front-back direction, the first, second, and third preliminary seedling loading tables 38a, 38b, and 38c are Since the seedling boxes 68 can be arranged in a partially fitted state, the seedling boxes 68 to be loaded on the preliminary seedling mounting tables 38a, 38b, and 38c can be smoothly moved to the rear side, and work efficiency is improved compared to the conventional method.

In addition, as shown in the side views of FIGS. 3 and 5, the front protrusions 38a1, 38b1, 38c1 of the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are shaped like rear upward slopes (rear upward slopes). ), and the upper surface of the sloping shape is made higher than the seedling mounting surfaces of each of the preliminary seedling mounting tables 38a, 38b, and 38c. In addition, the rear protrusions 38a2, 38b2, 38c2 of the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are made higher than the seedling mounting surface of each of the preliminary seedling loading tables 38a, 38b, and 38c, and the front side It is set to be the same as or lower than the upper surface of the protrusions 38a1, 38b1, and 38c1.

Since the front protrusions 38a1, 38b1, and 38c1 are formed as rear upward slope parts, when the first, second, and third preliminary seedling stands 38a, 38b, and 38c are in the unfolded state, the front side preliminary seedling stands When moving the seedling box 68 (see FIG. 12) from the back side spare seedling mounting stands 38b, 38c, etc., the seedling box 68 can be moved backward by being placed on the rear upward slope. etc., and work efficiency is improved compared to before. In addition, by making the upper surfaces of the front protrusions 38a1, 38b1, 38c1 and the rear protrusions 38a2, 38b2, 38c2 higher than the seedling mounting surfaces of each of the preliminary seedling mounting stands 38a, 38b, 38c, the first to third preliminary When the seedling stands 38a, 38b, 38c are in the storage mode, the seedlings placed on the respective preliminary seedling stands 38a, 38b, 38c using the front protrusions 38a1, 38b1, 38c1 and the rear protrusions 38a2, 38b2, 38c2. Since it is possible to prevent the boxes 68 and the like from moving back and forth, it is possible to prevent the seedling boxes 68 and the like from falling downward from each of the preliminary seedling platforms 38a, 38b, and 38c, and there is no need to pick up the fallen seedling boxes 68 and the like. , work efficiency is improved compared to before.

Between the right and left of the pair of front side protrusions 38a1, 38b1, 38c1 of each preliminary seedling table 38a, 38b, 38c, and at the bottom of the preliminary seedling table 38a, 38b, 38c, the front side of the preliminary seedling table 38a, 38b. Receiving members 38a3, 38b3, 38c3 for receiving the rear protrusions 38a2, 38b2, etc. are provided, respectively, and the receiving members 38a3, 38b3, 38c3 protrude into the space between the pair of front protrusions 38a1, 38b1, 38c1. It is formed by

In this way, the rear protrusions 38a2, 38b2 of the front preliminary seedling platforms 38a, 38b are received by the receiving members 38b3, 38c3 between the left and right front protrusions 38b1, 38c1 of the respective preliminary seedling platforms 38b, 38c. This prevents each of the preliminary seedling platforms 38a, 38b, and 38c from lowering too much, and ensures that the expanded preliminary seedling platforms 38a, 38b, and 38c are lined up almost on the same plane. Loading work such as 68 becomes easier, and work efficiency is improved compared to before.

Furthermore, by providing the receiving members 38a3, 38b3, 38c3 at the bottoms of the preliminary seedling stands 38a, 38b, 38c, the upper ends of the rear protrusions 38a2, 38b2, 38c2 are the upper ends of the front protrusions 38a1, 38b1, 38c1. Since the seedling boxes 68 and the like are placed on the front protrusions 38a1, 38b1, and 38c1 having rear upward slopes, the movement of the seedling boxes 68 and the like can be carried out smoothly, making work efficiency higher than before. improves.

In addition, first, second, and third partition walls 38a4, 38b4 are provided at four locations in total on the front and back of the left and right sides of the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c to prevent the seedling box 68 from falling. , 38c4 are arranged respectively.

Further, the rotation fulcrum 39b3 of the second movable link member 39b may be provided coaxially with the rotation axis 37b1 of the second preliminary seedling mounting stand 38b. In this case, the second preliminary seedling mounting stand 38b at the center does not move back and forth.

As described above, the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are moved in the front-back direction by the operation (rotation) of the first, second, and third movable link members 39a, 39b, and 39c. The state can be switched between the unfolded state and the stacked state in which the preliminary seedling platforms 38a, 38b, and 38c are arranged vertically, and this switching can be performed by a switching drive device 70 driven by an electric motor 71. The switching drive device 70 includes a drive gear 71a attached to a rotating shaft (not shown) of the electric motor 71, and a disc-shaped, semi-circular, or A half-moon-shaped switching gear 70a is provided.

The switching gear 70a is provided concentrically with the rotation shaft 39b3 of the movable link member 39b provided on the front branch column 49a, and rotates integrally with the rotation shaft 39b3, so that the rotation shaft 39b3 is driven by the electric motor 71. rotates, and at the same time, the second movable link member 39b, which is integral with the rotation shaft 39b3, rotates, so that the first, second, and third movable link members 39a, 39b, and 39c are placed in a stacked state and an expanded state. Can be switched.

FIG. 8 shows an operation control block diagram of the preliminary seedling mounting tables 38a, 38b, and 38c.

A changeover switch 73 (a button or a lever may be used) (FIGS. 1 and 2) is operated near the seat 31 as a changeover operation means for switching the preliminary seedling mounting tables 38a, 38b, and 38c between the unfolded state and the stacked state using the changeover drive device 70. Further, as shown in the simplified diagrams of FIGS. 4 and 6, when the preliminary seedling mounting tables 38a, 38b, and 38c are rotated to the expanded state or stacked state by operating the changeover switch 73, these preliminary seedlings are Stop plates 73a1, 73a2 for stopping the platforms 38a, 38b, 38c were provided on the sides of the third preliminary seedling platform 38b and the second preliminary seedling platform 38c, respectively. When the preliminary seedling platforms 38a, 38b, and 38c are stacked, the second moving link member 39b hits the stop plate 73a1, overloading the electric motor 71 and causing excessive voltage or overheating. When the preliminary seedling platforms 38a, 38b, and 38c are in the unfolded state, the stop plate 73a2 hits the second moving link member 39b, overloading the electric motor 71 and generating an excessive voltage. This is a component that causes the device to overheat or stop operating due to overheating.

Furthermore, if the stop plates 73a1 and 73a2 continue to contact the second movable link member 39b, the load (the second movable link member 39b contacts the stop plate 73a1 or 73a2 and drives the stop plate 73a1 or 73a2 even though it cannot rotate any more). This refers to the load on the electric motor 71 that continues. Inside the electric motor 71, a current-carrying path using a bimetal 85 is arranged. When the load heats up the bimetal 85 or excessive voltage is applied, the bimetal 85 bends (retracts). ), the electricity is turned off and the electric motor 71 stops rotating.In the case of a voltage type, it can be operated again immediately after stopping.In addition, in the case of a heating type, the heat of the bimetal 85 decreases and the rotation of the electric motor 71 is stopped. The electric motor 71 is configured to stop at the point where the electric motor 71 does not operate until the operator returns to the original position.The operator does not have to perform an operation to stop the electric motor 71, so the operator can concentrate on other operations, and the work efficiency is higher than before. improve.

Furthermore, when the preliminary seedling mounting tables 38a, 38b, and 38c are in the unfolded or loaded state, the second movable link member 39b comes into contact with the stop plate 73a1 or 73a2, so the vibration of the machine body causes the second movable link member 39b to This prevents the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c from shaking back and forth due to the movement of the seedlings, thereby preventing the seedlings from falling, and preventing the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c from shaking. Wear of the mounting tables 38a, 38b, 38c and other components for placing preliminary seedlings is reduced.

Furthermore, since it is possible to omit components and circuits such as a switch for stopping the electric motor 71 when the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are in the unfolded or loaded state, The number of parts is significantly reduced and the configuration is simplified.

When a conventional limit switch is used, a cable and a circuit are required to send a stop signal at the same time as the movable link members 39b and 39c come into contact with the switch, resulting in a large number of parts and a complicated structure. In addition, a limit switch that stops the device in the expanded state and a limit switch that stops the device in the loaded state are required, which further increases the number of parts and complicates the structure.

In contrast, in the present invention, the electric motor 71 automatically stops when the bimetal 85 inside the electric motor 71 retreats (bends) due to overvoltage or overheating, so a path for transmitting a stop signal is not required. It is sufficient to provide a switch for operating the electric motor to the unfolded state and the loaded state, and simply connect the switch and the electric motor with a cable, thereby reducing the number of parts and simplifying the structure.

Further, as shown in FIG. 5, when the first, second, and third preliminary seedling mounting stands 38a, 38b, and 38c are in the unfolded state, the first, second, and third movable link members 39a, 39b, and 39c A stop plate 73a1 for stopping the movement of the seedlings is disposed on the second preliminary seedling mounting table 38b in the center stage, and as shown in FIG. By arranging the stop plate 73a2 that stops the first, second, and third movable link members 39a, 39b, and 39c in the lower third preliminary seedling mounting stand 38c in the expanded state or loaded state, Since the first, second, and third movable link members 39a, 39b, and 39c are in contact with each other, a simple configuration can be achieved.

Since the first, second, and third movable link members 39a, 39b, and 39c are configured to come into contact with the stop plates 73a1 and 73a2 and stop, vibrations of the aircraft body cause the first, second, and third movable link members 39a to stop. , 39b, 39c are moved and the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are prevented from swinging back and forth, and the falling of the seedlings is prevented, and the first, second, and third seedling stands are prevented from falling due to shaking. Wear of the third preliminary seedling mounting tables 38a, 38b, 38c and the surrounding members is reduced.

Furthermore, the contact between the first, second, and third movable link members 39a, 39b, and 39c and the stop plates 73a1 and 73a2 makes it easier to apply a load to the electric motor 71, so that the electric motor 71 stops faster and consumes less power. quantity is reduced.

Further, FIGS. 9(a) and 9(b) show simplified diagrams of the loading and unfolded states of the first, second, and third preliminary seedling loading tables 38a, 38b, and 38c, which are other embodiments of the present invention. show. In this case, the stop plates 73a1 and 73a2 are provided on the front and rear sides of the second preliminary seedling mounting stand 38b, respectively.

In this case, when the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are placed in a loaded state, the upper and lower ends of the second movable link member 39b abut against the stop plates 73a1 and 73a2, respectively. Since the first, second, and third movable link members 39a, 39b, and 39c are in a stopped state, the first, second, and third movable link members 39a, 39b, and 39c move due to the vibration of the aircraft, and the first, second, and third movable link members 39a, 39b, and 39c move. The second and third preliminary seedling platforms 38a, 38b, and 38c are prevented from swinging back and forth, and the seedlings are prevented from falling, and the first, second, and third preliminary seedling platforms 38a, 38b, and Wear of components including 38c is reduced.

Further, when the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c switch from the loaded state to the unfolded state, the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are placed in the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c, as shown in partially enlarged views in the round frames A and B of FIG. 9(b). Since the second moving link member 39b and the first and third moving link members 39a and 39c sandwich the stop plates 73a1 and 73a2, respectively, the first, second and third moving link members 39a, 39b and 39c are locked. This prevents the first, second, and third movable link members 39a, 39b, and 39c from moving and shaking back and forth due to the vibration of the machine, preventing the seedlings from falling, and preventing the seedlings from falling, as well as preventing the seedlings from falling. Wear of the components is reduced.

As shown in the plan view of the switching drive device 70 in FIG. 10(a) and the internal structural diagram of the switching drive device 70 in FIG. , an auxiliary plate 79 is provided with a rotation shaft 71a1 of the drive gear 71a of the electric motor 71 out of phase with the rotation shaft 81 of the switching gear 70a that moves the second and third moving link members 39a, 39b, and 39c. do. A motor mounting plate (holding plate) 80 is mounted across the cover plate 78 and the auxiliary plate 79, and an electric motor 71 for rotating the rotating gear 70a is mounted on the holding plate 80. .

In the switching drive device 70 having the above configuration, a holding plate 80 is provided across the cover plate 78 and the auxiliary plate 79, and the electric motor 71 is mounted on the holding plate 80, so that the first, second, and third movements When the link members 39a, 39b, 39c contact the stop plates 73a1, 73a2 and a load is applied, the force that the electric motor 71 escapes is applied to the holding plate 80, and the cover plate 78 receives this force, so that the holding plate 80 It becomes difficult to bend.

Further, since no force is applied to the electric motor 71 due to the load, the electric motor 71 is prevented from escaping, and the distance between the electric motor 71 and the switching gear 70a is prevented from increasing, so that the adjustment of the switching drive device 70 is performed. is omitted, reducing the labor of the operator.

As shown in FIG. 11, which is a plan view of the switching drive device for the first, second, and third auxiliary seedling platforms 38a, 38b, and 38c, the switching drive device 70 is operated around the side surface of the second auxiliary seedling platform 38b. A guide cover 88 is provided to cover the drive gear 71a of the electric motor 71, and the guide cover 88 is divided into a main cover 83 that covers the drive gear 71a of the electric motor 71 and an auxiliary cover 82 that covers the electric motor 71.The main cover 83 is connected to the cover plate 78, and the auxiliary cover 82 is connected to the main cover 83 and the cover plate 78.

With the configuration shown in FIG. 11, when the auxiliary cover 82 is removed, the electric motor 71 and the holding plate 80 are exposed, so the guide cover 88 can be adjusted and cleaned without having to remove the entire guide cover 88 every time maintenance is performed, making maintenance easier than ever. improves.

The electric motor 71 may include a bimetal 85 (shown only in FIG. 8) that deforms and stops energizing when a load is applied and heat above a predetermined temperature is generated. In this way, if the electric motor 71 is overloaded and an overvoltage is generated, or if the temperature exceeds a predetermined temperature due to overheating, the bimetal 85 is deformed and the electricity supply is stopped. When the platforms 38a, 38b, and 38c are in the unfolded or loaded state, the electric motor 71 will stop if an overvoltage is applied to it or if it becomes overheated, so there is no need to perform an operation to stop the electric motor 71.

In addition, the side views of the preliminary seedling platform shown in FIGS. 12(a) and 12(b), the plan view of FIG. 12(c), and the enlarged view of the front protrusion of the preliminary seedling platform shown in FIG. 12(d) Front protrusions 38b1 and 38c1, which protrude forward, are formed at the front ends of the first, second, and third preliminary seedling stands 38a, 38b, and 38c, respectively. 38b1, 38c1 are formed with rear upward slopes, and conveyance assisting rollers 47b, 47c are disposed, respectively, on the front protrusions 38b1, 38c1 to freely rotate and assist in conveying the seedlings. Further, the upper surfaces of the conveyance auxiliary rollers 47b, 47c are configured to protrude higher than the upper portions of the rear upward slopes of the front protrusions 38b1, 38c1.

Further, the seedling box mounting member 101 shown in FIGS. 13 and 14 will be explained.

A seedling box mounting member 101 on which a seedling box 68 is placed is provided on the outside of each of the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c. Since this seedling box mounting member 101 is fixed to the spare seedling mounting table, it is configured to move together with the preliminary seedling mounting table.

Further, it is made of a wire rod and is open in the front and rear directions and the upper part of the body, and the front and rear ends of the seedling box mounting member 101 are sloped. Therefore, the seedling box 68 can be taken in and out from the front and rear directions and from above the machine body, and the slope prevents the seedling box 68 from falling due to the vibration of the machine body when placed on the seedling box mounting member 101.

Furthermore, when the first, second, and third preliminary seedling mounting tables 38a, 38b, and 38c are switched from the loading state to the unfolded state, the seedling box mounting members 101 are similarly arranged in the vertical direction of the machine body. The moving state 101a is switched to the take-out state 101b where the objects are lined up in the longitudinal direction of the machine.

In the unloading state 101b, the seedling box mounting members 101 are lined up in the longitudinal direction of the machine body, so that the seedling box mounting members 101 form adjacent rails, making it easy to load and unload the seedling boxes 68 from the machine body to the field.

Further, since the seedling box 68 placed on the seedling box mounting member 101 can be easily taken out from the field side, work efficiency is improved.

In addition, in the take-out state 101b, the seedling box mounting member 101 located at the rear of the machine is located higher than the seedling box mounting member 101 located at the front of the machine, so that the seedling box 68 can be moved smoothly to the front of the machine. Can be sent.

Further, the seedling box mounting member 101 is configured to place the seedling box 68 in an oblique position facing the outside of the body. By doing so, when the first, second, and third preliminary seedling platforms 38a, 38b, and 38c are in the loaded state (whole movement state 101a), the seedling box 68 tilts toward the inside of the machine body and comes into contact with the preliminary seedling platforms. This can be prevented.

Further, with the seedling box 68 placed on the seedling box mounting member 101, it is possible to switch between the entire moving state 101a and the taking out state 101b. In the overall movement state 101a, the seedling box mounting members 101 are spaced apart from each other and lined up in the vertical direction of the machine body, so that the seedling box mounting members 101 positioned above play the role of fixing the seedling box 68 located below. Note that the seedling box 68 placed on the top can be prevented from falling from the body by a separate fixing member (not shown).

Further, the front end and the rear end of the seedling box mounting member 101 are bent toward the upper side of the body. This prevents the seedling box 68 from sliding due to vibrations of the aircraft body or while traveling on a slope.

The seedling transplanter according to the present invention can be used not only as a rice transplanter but also as a seedling transplanter for planting other seedlings such as vegetable seedlings.

2 Traveling vehicle body 49 Support machine frame 68 Seedling box 101 Seedling box mounting member 101a Overall movement state 101b Individual movement state

Claims (3)

In a seedling transplanter equipped with a seedling box (68) or a plurality of spare seedling frames (38) for placing seedlings on a support frame (49) provided on a traveling vehicle body (2),
A seedling box mounting member (101) for placing seedling boxes (68) on the plurality of spare seedling frames (38) is provided, and the seedling box mounting member (101) is mounted on the outside of the machine body of the preliminary seedling frame (38) or The seedling box (68) provided inside the machine body and placed on the seedling box mounting member (101) is supported in an oblique attitude toward the outside of the machine body, and among the constituent members of the seedling box mounting member (101), the seedling box (68) is The front and rear sides of the bottom of the machine that support the box (68) are bent upward,
The seedling box mounting member (101) is provided in each of a plurality of preliminary seedling frames (38),
The plurality of seedling box mounting members (101) are in a take-out state (101b) arranged in the longitudinal direction of the machine body, or the plurality of seedling box mounting members (101) are in a whole movement state (101a) arranged in the vertical direction of the machine body. Characteristic seedling transplanter. When the plurality of seedling box mounting members (101) are in the entire movement state (101a), the seedling box mounting member (101) located above the machine body is placed on the lower seedling box mounting member (101). The seedling transplanter according to claim 1, characterized in that it plays a role of preventing the box (68) from falling. When the plurality of seedling box mounting members (101) are in the unloading state (101b), the seedling box mounting member (101) located at the rear of the machine is located above the seedling box mounting member (101) located at the front of the machine. The seedling transplanter according to claim 1 or 2, characterized in that: