JP2015156847A - seedling transplanting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanting machine in which the deformation of a seedling platform is inhibited, and thereby the decrease of seedling planting accuracy can be inhibited.SOLUTION: A seedling transplanting machine 1 includes a seedling loading member 60 with a seedling platform 61 provided in a reciprocating manner at the rear of a traveling vehicle body and a planting mechanism 36. The seedling loading member 60 includes: a slide member 62 provided extending in the lateral direction at the lower part of the seedling platform 61; a first supporting member 63 provided extending in the lateral direction in the central part of the vertical direction of the seedling platform 61; a balance spring 65 mounted to the first supporting member 63 and regulating the left-and-right-hand turning of the seedling platform 61; and a first reinforcing member 80 for connecting the slide member 62 with the first supporting member 63.

Description

  The present invention relates to a seedling transplanter that performs operations such as planting seedlings in a field.

  The seedling transplanter has a traveling vehicle body that travels in a field, a seedling transplanting device that is attached to the rear portion of the traveling vehicle body, and the like. This type of seedling transplanter is disclosed, for example, in Patent Document 1 below.

JP 2009-142296 A

  By the way, the seedling planting device of the seedling transplanting machine shown in Patent Document 1 and the like is provided with a seedling mounting table on which a seedling is loaded so as to be reciprocally movable in the left-right direction with respect to the support frame provided at the rear of the machine body. The support frame and the seedling stage are connected by left and right balance springs to adjust the change in the position of the center of gravity when the seedling stage reciprocates in the left-right direction. However, the balance spring always urges the seedling stage, and the urging force becomes maximum when the seedling stage is moved to the left and right ends. For this reason, if the seedling platform is positioned at the left and right ends during transportation or non-working, the urging force of the balance spring acts continuously on the seedling platform, and the seedling platform cannot withstand the load and deforms. Problems arise.

  If the seedling platform is deformed, the urging force of the balance spring will be different on the left and right, and the seedling planting depth will be different on the left and right of the aircraft, or in the worst case, seedlings cannot be planted There arises a problem that the planting accuracy of the seedlings is lowered, such as generation of a stripe.

  Therefore, an object of the present invention is to provide a seedling transplanting machine that can improve the disadvantages of the conventional example, suppress the deformation of the seedling stage, and suppress a decrease in seedling planting accuracy.

  In order to achieve the above object, the invention according to claim 1 is a seedling mounting member having a seedling mounting base (61) on the rear part of the traveling vehicle body (2), which is provided so as to be reciprocally movable in the left-right direction and for loading seedlings. (60) and a planting mechanism (36) for taking seedlings from the seedling placing stand (61) and planting them in a field, the seedling placing member (60) includes the seedling placing member (60), A sliding member (62) provided extending in the left-right direction at the lower portion of the seedling table (61), and extending in the left-right direction at the vertical center of the seedling table (61). A first support member (63), a posture holding member (65) attached to the first support member (63) and restricting the horizontal rotation of the seedling platform (61), and the sliding A first reinforcing member (80) connecting the member (62) and the first support member (63). A seedling transplanting machine according to symptoms.

  In the invention according to claim 2, the seedling placing member (60) is rotatably mounted with an extended seedling placing stand (70) on at least one of left and right end portions of the seedling placing stand (61). The seedling transplanter according to claim 1, wherein

  Further, in the invention described in claim 3, the seedling placing stand (61) includes a plurality of one-row seedling placing stands (68) for loading one row of seedlings, and each one-row seedling placing stand (68). ) Disposes the conveying belt (73) of the seedling conveying device (71) that moves the loaded seedlings downward at intervals in the left-right direction, and at least one of the plurality of one-row seedling placing stands (68). The seedling transplanter according to claim 1 or 2, wherein the first reinforcing member (80) is attached between the conveyor belts (73).

  According to a fourth aspect of the present invention, the first reinforcing member (80) is provided on the one-row seedling placing stand (68), and a seedling amount detecting member for detecting that the number of loaded seedlings has decreased. (74) is exposed through the opening (82), and both ends in the left-right direction are arranged in the wide part (81) disposed inside the conveying belt (73) of the seedling conveying device (71). The seedling transplanter according to claim 3, wherein the seedling transplanter is provided.

  In the invention according to claim 5, the seedling placing member (60) is a receiving member (66) that supports the sliding member (62) of the seedling placing base (61) so as to be capable of reciprocating in the left-right direction. ) And a regulating member (67) that is attached to the receiving member (66) and regulates the lifting of the sliding member (62), and the regulating member (67) reciprocates in the left-right direction. The seedling transplanter according to any one of claims 1 to 4, wherein the seedling transplanter is arranged at a position spaced from the first reinforcing member (80) attached to the seedling mount (61). .

  Moreover, invention of Claim 6 has arrange | positioned the said 1st reinforcement member (80) in the center of the left-right direction of the said seedling stand (61), Claim 1, Claim 3, characterized by the above-mentioned. It is a seedling transplanter as described in any one of Claim 4 and Claim 5.

  In the invention according to claim 7, the first reinforcing member (80) is provided between one end portion in the left-right direction of the seedling support (61), and the other end portion and the center in the left-right direction. The seedling transplanting machine according to any one of claims 1, 3, 4, and 5, wherein the seedling transplanting machine is arranged in the above.

  The invention according to claim 8 is characterized in that the first reinforcing member (80) is disposed at both right and left ends of the seedling support (61). It is a seedling transplanter as described in any one of claim | item 4 and claim | item 5.

  The invention according to claim 9 is characterized in that the seedling placing member (60) is provided on the upper portion of the seedling placing stand (61) so as to extend in the left-right direction, The second reinforcing member (78) connecting the first supporting member (63) and the second supporting member (64) is provided, according to any one of claims 1 to 8. This is a seedling transplanter.

  According to the first aspect of the present invention, since the first reinforcing member (80) in which the sliding member (62) of the seedling mount (61) and the first supporting member (63) are connected is provided, the seedling is provided. The rigidity of the platform (61) can be improved. For this reason, it can suppress that a seedling stand (61) deform | transforms and is distorted by the urging | biasing force from an attitude | position holding member (65), and can improve seedling planting accuracy.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the extended seedling support (70) can be rotated at least one of the left and right ends of the seedling support (61). Wearing. For this reason, even if the seedling support (61) is moved to one side in the left-right direction and the extended seedling support (70) is folded over a long period of time, the first reinforcing member (80) can be used as the seedling support (61). Therefore, the seedling stage (61) can be prevented from being deformed and distorted by the urging force from the posture holding member (65), and the seedling planting accuracy can be improved.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or claim 2, between the conveying belts 73 of the seedling conveying device (71) of the single seedling placing stand (68). Since the 1st reinforcement member (80) is provided, it can suppress that the dimension of the front-back direction of the traveling vehicle body (2) of the seedling mounting member (60) becomes large.

  According to invention of Claim 4, in addition to the effect of invention of Claim 3, the opening part (82) which exposes the seedling quantity detection member (74) is made into the wide part of the 1st reinforcement member (80). Therefore, the lowering of the rigidity of the first reinforcing member (80) due to the provision of the opening (82) can be suppressed. For this reason, it can suppress that a seedling stand (61) deform | transforms and is distorted by the urging | biasing force from a attitude | position holding member (65).

  Moreover, since the wide part (81) of the 1st reinforcement member (80) was arrange | positioned inside the conveyance belt (73) of a seedling conveyance apparatus (71), a wide part (81) interferes with a conveyance belt (73). Can be suppressed.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the regulating member that suppresses the floating of the sliding member (62) on the receiving member (66). Since (67) is provided, it is possible to suppress the seedling stage (61) from being lifted by the vibration of the traveling vehicle body (2), and to prevent the planting mechanism (36) from failing to plant the seedling.

  Moreover, since the restricting member (67) is disposed at a position spaced from the first reinforcing member (80), it is possible to suppress the range of reciprocating movement of the seedling placing table (61) from being narrowed, and the planting mechanism (36). However, the timing at which the seedling is taken from the seedling placing stand (61) is maintained, and a decrease in seedling planting accuracy can be suppressed.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1, 3, 4, and 5, the first reinforcing member (80) is formed as a seedling. Since it has arrange | positioned in the center of a mounting base (61), the rigidity of a seedling mounting base (61) can be improved with a simple structure.

  According to the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1, 3, 4, and 5, the first reinforcing member (80) is formed as a seedling. Since it arrange | positioned between one edge part of a mounting base (61), and the other edge part and the center, the rigidity of a seedling mounting base (61) can be improved.

  According to the invention described in claim 8, in addition to the effect of the invention described in any one of claims 1, 3, 4, and 5, the first reinforcing member (80) is formed as a seedling. Since it has arrange | positioned at the both ends of a mounting base (61), the rigidity of a seedling mounting base (61) can be improved.

  According to the ninth aspect of the present invention, in addition to the effect of the first aspect of the present invention, the first support member (63) and the second support member (64) Since it connected with the reinforcement member (78), the rigidity of a seedling stand (61) can be improved further. For this reason, it can suppress that a seedling stand (61) deform | transforms and is distorted by the urging | biasing force from an attitude | position holding member (65), and can improve seedling planting accuracy.

It is a side view showing the seedling transplanting machine concerning an embodiment. It is a top view showing the seedling transplanting machine concerning an embodiment. It is the front view which looked at the seedling placement member of the seedling transplanter concerning an embodiment from the front side. (A) is the front view which looked at the principal part of the seedling placement member of the seedling transplanter concerning an embodiment from the front side, and (b) of the principal part of the seedling placement member of a seedling transplanter concerning an embodiment It is a sectional side view. It is sectional drawing which expands and shows the V section of FIG.4 (b). It is sectional drawing seen from the upper direction of the conduction case of the seedling planting part of the seedling transplanting machine which concerns on embodiment. It is sectional drawing seen from the side of the conduction case of the seedling planting part of the seedling transplanting machine which concerns on embodiment. It is the front view which looked at the seedling mounting member of the seedling transplanter concerning the modification 1 of an embodiment from the front side. It is the front view which looked at the seedling mounting member of the seedling transplanter concerning the modification 2 of an embodiment from the front side. (A) is the front view which looked at the principal part of the seedling mounting member of the seedling transplanter concerning the modification 3 of an embodiment from the front side, and (b) of the seedling transplanter concerning the modification 3 of an embodiment It is a sectional side view of the principal part of a seedling mounting member. It is sectional drawing seen from the side of the conduction case of the seedling planting part of the seedling transplanting machine which concerns on the modification 4 of embodiment. It is sectional drawing seen from the side of the conduction case of the seedling planting part of the seedling transplanting machine which concerns on the modification 5 of embodiment.

  Below, the seedling transplanter concerning the embodiment of the present invention is explained in detail based on a drawing. Note that the present invention is not limited to these embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

[Embodiment]
A seedling transplanter 1 according to an embodiment of the present invention will be described with reference to FIGS. Drawing 1 is a side view showing the seedling transplanter concerning an embodiment. FIG. 2 is a top view illustrating the seedling transplanter according to the embodiment. FIG. 3 is a front view of the seedling placement member of the seedling transplanter according to the embodiment as seen from the front side. Fig.4 (a) is the front view which looked at the principal part of the seedling mounting member of the seedling transplanting machine which concerns on embodiment from the front side, FIG.4 (b) is the seedling mounting member of the seedling transplanting machine which concerns on embodiment. It is a sectional side view of the principal part. FIG. 5 is an enlarged cross-sectional view of a V portion in FIG. FIG. 6 is a cross-sectional view of the seedling transplanting unit of the seedling transplanter according to the embodiment as viewed from above the conduction case. Drawing 7 is a sectional view seen from the side of the conduction case of the seedling planting part of the seedling transplanter concerning an embodiment.

  The seedling transplanter 1 according to the embodiment is for planting seedlings in a farm field while traveling. In the following, the forward direction of the seedling transplanter 1 is the front side (left side in FIGS. 1 and 2), the backward direction of the seedling transplanter 1 is the rear side (right side in FIGS. 1 and 2), and the seedling transplanter An orthogonal direction orthogonal to the front-rear direction of 1 is the left-right direction, the right side of the forward direction is the right side (upper side of FIG. 2), the left side of the forward direction is the left side (lower side of FIG. 2), The vertical direction perpendicular to the vertical direction is the vertical direction.

  As shown in FIGS. 1 and 2, the seedling transplanter 1 includes a traveling vehicle body 2 that travels in a field, a seedling planting device 3 that is attached to the rear (rear side) of the traveling vehicle body 2, a power transmission mechanism 4, The leveling device 5 and a control device (not shown) are provided.

  The traveling vehicle body 2 has four wheels 12 including a pair of left and right front wheels 12a and 12a for traveling and a pair of left and right rear wheels (traveling wheels) 12b and 12b. The four wheels 12 serve as driving wheels. It is a wheel drive vehicle. The traveling vehicle body 2 includes a main frame 10 and an engine 11 mounted on the main frame 10. In the seedling transplanting machine 1, the driving force of the engine 11 is used not only for moving the traveling vehicle body 2 forward or backward, but also for driving the seedling transplanting device 3.

  The engine 11 is a heat engine such as a diesel engine or a gasoline engine, and outputs driving force from an output shaft. The output shaft protrudes from the left side of the traveling vehicle body 2. The engine 11 is disposed at a substantially center in the left-right direction of the traveling vehicle body 2 and in a state of protruding upward from the floor step 20 on which an operator places his / her foot when getting on. At this time, the output shaft of the engine 11 is located below the floor surface of the floor step 20.

  Here, the floor step 20 is provided between the front part (front side) of the traveling vehicle body 2 and the rear part (rear side) of the engine 11, and is mounted on the main frame 10. Part of the floor step 20 has a lattice shape so that mud attached to the shoes can be dropped onto the field. A rear step 21 that also serves as a fender for the rear wheels 12b and 12b is provided behind the floor step 20. The rear step 21 has an inclined surface that is inclined upward as it goes rearward, and is disposed on each of the left and right sides of the engine 11.

  The engine 11 protrudes upward from the floor step 20 and the rear step 21, and an engine cover 14 that covers the engine 11 is disposed in a portion protruding from these steps. That is, the engine cover 14 covers the engine 11 while projecting upward from the floor step 20 and the rear step 21.

  The traveling vehicle body 2 is provided with a cockpit 22 above the engine cover 14, and a front cover 23 is disposed in front of the pilot seat 22 and in front of the traveling vehicle body 2. . The front cover 23 is disposed in a state of protruding upward from the floor surface of the floor step 20, and divides the front side of the floor step 20 left and right.

  Inside the front cover 23 are arranged a control device (not shown), an operation device such as an operation panel, a steering mechanism, a fuel tank for engine fuel, and the like. Further, on the upper portion of the front cover 23, various operation levers, instruments, and a handle 24 are disposed. The handle 24 is provided as a steering member for steering and steering the front wheels 12a and 12a when an operator rotates the steering wheel 24, and the front wheels 12a and 12a are steered (rotated) via a steering mechanism or the like in the front cover 23. Rudder).

  Further, as various operation levers provided on the upper portion of the front cover 23, a travel operation lever (not shown) for switching the traveling vehicle body 2 forward / backward, stop and moving speed is provided. In addition, as various operation levers provided on the upper portion of the front cover 23, a “road traveling mode” in which the traveling vehicle body 2 travels on the road, a “work traveling mode” in which seedlings are planted in the field while the traveling vehicle body 2 travels, and the like. An auxiliary speed change lever (not shown) for switching between the two is provided. In addition, as various operation levers provided on the upper portion of the front cover 23, a stock change dial (a seedling planting interval in the traveling direction of the traveling vehicle body 2) that changes the seedling interval (seed planting interval in the traveling direction of the traveling vehicle body 2) planted by the seedling planting device 3 in the field. (Not shown) is provided. In the embodiment, the inter- stock change dial is a state in which the number of stocks per seedling (planting interval) is 37 stocks, a state of 42 stocks, a state of 47 stocks, and a state of 50 stocks. , 60 stocks, 70 stocks, 80 stocks, and 90 stocks.

  Furthermore, a leveling height adjustment lever (not shown) for adjusting the height of the leveling device 5 is disposed as various operation levers provided on the upper portion of the front cover 23. In the front cover 23, a detection sensor (not shown) for detecting the operation position of the leveling height adjusting lever is disposed. Further, a partial changeover switch for turning on / off the operation of some planting mechanisms 36 of the seedling planting device 3 is provided at an upper portion of the front cover 23 or the like. The partial changeover switch has a one-to-one correspondence with the planting mechanism 36. The partial changeover switch changes the on / off state of the planting partial clutch of the planting mechanism 36 corresponding to the control device. Furthermore, a seedling removal amount change switch for changing the seedling removal amount of the planting basket 36c of the seedling planting device 3 is provided on the upper portion of the front cover 23 or the like. The seedling removal amount change switch causes the control device to change the seedling removal amount of the planting basket 36c of the seedling planting device 3.

  In addition, a spare seedling stage 25 on which replenishment seedlings are placed is arranged on the left and right sides of the front cover 23 in the floor step 20. The preliminary seedling mounting table 25 is rotatably supported by a support shaft (vertical shaft) protruding from the floor surface of the floor step 20 and can be rotated by an operator's hand.

  Further, a fertilizer application device 26 (shown in FIG. 1) is provided behind the cockpit 22 of the traveling vehicle body 2. The fertilizer application device 26 releases the granular fertilizer stored in the fertilizer hopper 27 to the field by a certain amount during planting work.

  The seedling planting device 3 is attached to the rear part of the traveling vehicle body 2, and a seedling planting unit 30 for planting seedlings in the field, and a seedling planting unit lifting mechanism 31 for raising and lowering the seedling planting unit 30 relative to the traveling vehicle body 2. And. The seedling planting part elevating mechanism 31 has an elevating link mechanism 32, and the seedling planting part 30 is attached to the traveling vehicle body 2 via the elevating link mechanism 32. The elevating link mechanism 32 has an upper link and a lower link that connect the rear portion of the traveling vehicle body 2 and the seedling planting portion 30, and these links are erected on the rear end of the main frame 10. It is connected to the portal link base frame 33 so as to be rotatable, and the other end of each link is rotatably connected to the seedling planting part 30 so that the seedling planting part 30 can be moved up and down to the traveling vehicle body 2. doing.

  The seedling planting part lifting mechanism 31 has a hydraulic lifting cylinder 34 that expands and contracts by the hydraulic pressure generated by the driving force of the engine 11, and the lifting link mechanism 32 is planted by the expansion and contraction operation of the hydraulic lifting cylinder 34. The part 30 can be moved up and down. The raising / lowering mechanism 31 of the seedling planting part can raise the seedling planting part 30 to a non-working position or lower it to a ground work position (seedling planting position) by its lifting / lowering operation. .

  The seedling planting unit 30 can plant seedlings in a field with a plurality of sections or a plurality of rows in a seedling planting range. The seedling transplanter 1 according to the embodiment is a so-called eight-row planting plant in which seedlings are planted in eight sections. The seedling planting unit 30 includes a planting frame 35 provided so as to be movable up and down by the lifting link mechanism 32, a planting mechanism 36, a seedling placement member 60 provided at the rear part of the traveling vehicle body 2, and a float 38. I have.

  The planting frame 35 is attached to the upper link of the elevating link mechanism 32 and the rear end of the lower link. As shown in FIGS. 3 and 4, the seedling placement member 60 includes a seedling stage 61, a sliding member 62, and a first support member 63 that are provided at the rear portion of the traveling vehicle body 2 so as to be reciprocally movable in the left-right direction. A balance spring 65 (shown in FIG. 4), a receiving member 66 (shown in FIG. 5), and a regulating member 67.

  The seedling support 61 reciprocates in the left-right direction by the driving force from the engine 11. The seedling placing table 61 includes a plurality of one-row seedling placing stands 68 for loading one row of seedlings. In the present embodiment, the seedling placing stand 61 includes seven single seedling placing stands 68 and these are arranged in the left-right direction. In addition, the seedling mounting member 60 is rotatably mounted on the left end portion of the seedling mounting table 61 via a hinge mechanism 69 (shown in FIG. 1), and an extended seedling mounting table 70 on which one row of seedlings is loaded. ing. The extension seedling stage 70 is rotatable around an axis (not shown) that is parallel to the front-rear direction and is parallel to the upper surface of the single seedling stage 68 by a hinge mechanism 69 (shown in FIG. 1). Is provided. The extended seedling stage 70 has a state in which the upper surface thereof is positioned on the same plane as the upper surface of the single seedling stage 68 of the seedling stage 61 and the upper surface of the single seedling stage 68 of the seedling stage 61. It is rotated around the axis by the hinge mechanism 69 over a state of being opposed to each other.

  In the present embodiment, the seedling transplanting machine 1 loads seven seedlings in total by providing seven one-row seedling placing stands 68 and only one extended seedling placing stand 70. In the present embodiment, the extended seedling table 70 is rotatably attached to the left end portion of the seedling table 61. However, in the present invention, the extended seedling table 70 is rotatable to the right end portion of the seedling table 61. You may attach to. In short, in the present invention, one or more extended seedling platforms 70 may be provided, and the extended seedling platforms 70 may be rotatably attached to at least one of the left and right ends of the seedling platform 61.

  The one-row seedling placing stand 68 and the extended seedling placing stand 70 are partitioned in the left-right direction of the traveling vehicle body 2, and a mat-like seedling with soil can be loaded on each upper surface. Thereby, it is not necessary to return the seedling prepared outside the field every time the seedling loaded on the seedling mount 61 is planted, and continuous work can be performed, so that the work efficiency is improved.

  The single-row seedling placing stand 68 and the extended seedling placing stand 70 include a seedling conveying device 71 that moves the loaded seedlings downward and moves the seedlings to a seedling opening provided at the lower end. The seedling conveying device 71 is attached to the front side of the seedling placing table 61. The seedling transporting device 71 is arranged on the seedling placing table 61 at intervals in the vertical direction, and one of the rotating bodies 72 is rotated by the driving force of the engine 11 and the outside of the pair of rotating bodies 72. And an endless conveying belt 73 that has been passed. The conveyor belt 73 is exposed to the seedling side loaded on the seedling placing stands 68 and 70 through openings provided in the seedling placing stands 68 and 70. A pair of transport belts 73 is provided in the single seedling transport apparatus 71 with an interval in the left-right direction. In this way, each one-row seedling placing stand 68 has a pair of conveying belts 73 of the seedling conveying device 71 that moves the loaded seedlings downward with a gap in the left-right direction. The seedling conveying device 71 supplies mat-like seedlings to the seedling outlet for one stock at the left and right moving ends of the seedling placing table 61.

  Further, the single seedling placing stand 68 and the extended seedling placing stand 70 are provided with a seedling amount detection member 74 (shown in FIG. 4) for detecting that the number of loaded seedlings has decreased. The seedling amount detection member 74 detects whether or not the seedlings loaded have decreased by detecting whether or not the seedlings are in contact, and outputs the detection result to the control device.

  As shown in FIG. 3, the sliding member 62 extends in the left-right direction below the seedling support 61. The sliding member 62 is provided over the entire length in the left-right direction below the seedling table 61. The sliding member 62 is fixed to the front side of the seedling table 61. Furthermore, when the upper surface of the extended seedling platform 70 is located on the same plane as the upper surface of the single seedling platform 68 of the seedling platform 61, the extended seedling platform 70 is linearly extended with the sliding member 62. A sliding member 62a is attached.

  The first support member 63 is provided extending in the left-right direction at the center of the seedling support 61 in the vertical direction. The first support member 63 is provided over the entire length in the left-right direction of the central portion of the seedling support 61. The first support member 63 is fixed to the front side of the seedling support 61. Furthermore, when the upper surface of the extended seedling table 70 is located on the same plane as the upper surface of the single seedling table 68 of the seedling table 61, the extended seedling table 70 is also linear with the first support member 63. An extended first support member 63a is attached.

  The second support member 64 is provided to extend in the left-right direction at an upper part in the vertical direction of the seedling support 61. The second support member 64 is provided over the entire length in the left-right direction of the upper portion of the seedling table 61. The second support member 64 is fixed to the front side of the seedling support 61. Furthermore, when the upper surface of the extended seedling platform 70 is located on the same plane as the upper surface of the one-row seedling platform 68 of the seedling platform 61, the extended seedling platform 70 is also linear with the second support member 64. An extended second support member 64 is attached.

  The sliding member 62, the first support member 63, and the second support member 64 are supported by the planting frame 35 and the like so as to be reciprocally movable in the left-right direction. The first support member 63 and the second support member 64 are supported by a roller (not shown) provided on the planting frame 35 so as to be reciprocally movable in the left-right direction.

  The balance spring 65 is attached to the first support member 63, the planting frame 35, and the like, and rotates in the left-right direction of the seedling table 61 that reciprocates in the left-right direction (the seed-loading table protruding outward in the left-right direction) The rotation of the end portion downward). In other words, the balance spring 65 adjusts the position of the center of gravity of the seedling table 61 when the seedling table 61 reciprocates in the left-right direction.

  The receiving member 66 supports the sliding member 62 of the seedling table 61 so as to be reciprocally movable in the left-right direction. The receiving member 66 is fixed to the planting frame 35 and the like, and is arranged to extend linearly in the left-right direction at the rear and lower part of the traveling vehicle body 2. As shown in FIG. 5, the receiving member 66 is attached to the sliding member 62, and a sliding member 75 formed in a U-shaped cross section is slidably engaged on the upper side, so that the sliding member 62 is engaged. That is, the drop off of the seedling table 61 from the receiving member 66 is restricted.

  As shown in FIG. 5, the regulating member 67 is attached to the receiving member 66 and regulates the floating of the sliding member 62. A plurality of restricting members 67 are provided at intervals in the left-right direction. In the present embodiment, two restricting members 67 are provided at intervals in the left-right direction. As shown in FIG. 5, the restricting member 67 is mounted on the front side of the receiving member 66 with bolts or the like, and is bent rearward from the upper end of the mounting portion 76 and positioned above the sliding member 62. A floating prevention portion 77 is provided integrally. The lifting prevention portion 77 is arranged at a distance from the sliding member 62 and interferes with the sliding member 62, thereby restricting the lifting of the sliding member 62 from the receiving member 66.

  In addition, the seedling support 61 includes at least one first reinforcing member 80 as shown in FIGS. 3 and 4. In the present embodiment, the seedling stage 61 includes two first reinforcing members 80. In the present embodiment, the first reinforcing member 80 is attached to the single-row seedling placing stand 68 located at both left and right ends of the plurality of single-row seedling placing stands 68 constituting the seedling placing stand 61. In this way, the first reinforcing member 80 is disposed at the left and right ends of the seedling support 61.

  The first reinforcing member 80 is formed in a band plate shape, and one end is attached to the front side of the sliding member 62 with a plurality of bolts and the other end is attached to the front side of the first support member 63 with a plurality of bolts and the like. Thus, the sliding member 62 and the first support member 63 are connected. Further, as shown in FIG. 4A, the first reinforcing member 80 is disposed between the conveying belts 73 of the seedling conveying device 71 whose longitudinal direction is arranged parallel to the vertical direction and attached to the single seedling placing stand 68. And is arranged at the center in the left-right direction of the single-row seedling placing stand 68. That is, the first reinforcing member 80 is attached between the conveying belts 73 in at least one of the plurality of single-row seedling placing stands 68.

  The first reinforcing member 80 is provided with a wide portion 81 that is wider in the left-right direction than both ends at the center portion in the longitudinal direction, and the seedling amount detection member 74 is placed on the center of the wide portion 81 in the left-right direction. An opening 82 is provided to be exposed on the upper surface side of the stand 68, that is, on the seedling side loaded on the single seedling placing stand 68. Furthermore, the left and right ends of the wide portion 81 are disposed inside the transport belt 73 of the seedling transport device 71. In this way, the first reinforcing member 80 exposes the seedling amount detection member 74 to the seedling side through the opening 82, and the opening 82 is provided in the wide portion 81 where both ends in the left-right direction are disposed inside the conveyor belt 73. Yes.

  Further, the first reinforcing member 80 is disposed at a position spaced from a regulating member 67 (shown by a dotted line in FIG. 3) when the seedling support 61 is located at the left and right moving end, and interferes with the regulating member 67. There is nothing. That is, the regulating member 67 is disposed at a position spaced from the first reinforcing member 80 attached to the seedling placing table 61 that reciprocates in the left-right direction.

  The seedling placing member 60 described above allows the seedling placing table 61 to be reciprocated in the left-right direction by the driving force from the engine 11, so that the seedlings loaded on the single seedling placing stand 68 and the extended seedling placing stand 70 are loaded. The planting mechanism 36 is supplied. The seedling placement member 60 is disposed at the rear part of the traveling vehicle body 2 via the planting frame 35 and the like so as to be raised and lowered by the seedling planting part lifting mechanism 31.

  The planting mechanism 36 is arranged below the seedling placing member 60 and takes seedlings from the seedling placing stand 61 and the extended seedling placing stand 70 and places them in the field. The planting mechanism 36 is provided for every two strips, and includes a plurality of planting rods 36c for two strips. In the present embodiment, a total of four planting mechanisms 36 are provided, and each planting mechanism 36 includes two planting ridges 36c per line. The planting mechanism 36 is attached to the lower end portion of the planting frame 35 and has a transmission case 36a extending rearward from a lower frame 39 (shown in FIG. 7) extending linearly in the left-right direction, and a central portion. A rotation support portion 36b that is rotatably provided on the transmission case 36a is provided at the center.

  As shown in FIGS. 6 and 7, a driving sprocket 90 (shown in FIG. 7) that is rotated by the driving force of the engine 11 is provided at the front end of the conduction case 36a, and at the rear end of the conduction case 36a. A driven sprocket 91 (shown in FIG. 7) that can rotate in conjunction with the rotation support portion 36b is provided. The conduction case 36 a accommodates an endless chain 92 that spans between the drive sprocket 90 and the driven sprocket 91.

  Further, a planting partial clutch is attached to the drive sprocket 90. When the planting partial clutch is connected (turned on), the drive sprocket 90 is rotated by the driving force of the engine 11, and when the planting partial clutch is disconnected (disconnected), the drive sprocket 90 stops. The drive sprocket 90 moves in the left-right direction when the planting partial clutch is engaged.

  The rotation support portion 36b rotatably supports two implantation rods 36c corresponding to the respective strips at both ends. The rotation support portion 36 b is rotated around the central portion by the driving force from the engine 11 and rotates the two implantation rods 36 c by the driving force from the engine 11.

  The planting mechanism 36 is configured such that the planting rod 36c is loaded on the seedling table 61 by rotating the planting basket 36c at both ends of the rotation support portion 36b while the rotation support portion 36b is rotated around the center portion. Plant the seedlings in the field.

  The planting mechanism 36 includes a tension applying mechanism 93 that applies tension to the chain 92. As shown in FIGS. 6 and 7, the tension applying mechanism 93 is attached to the outer surface of the conduction case 36 a so as to be freely rotatable by a drive source such as a motor (not shown), and to the upper end of the support arm 94. An adjuster rod 95 that is extendable in the front-rear direction, a coil spring 96 attached to the rear end of the adjuster rod 95, and an applying member 97 attached to the rear end of the coil spring 96 are provided.

  The imparting member 97 is provided behind the support arm 94 and is rotatably provided on the outer surface of the conduction case 36a. The imparting member 97 includes a spring mounting piece 97b provided with a spring mounting hole 97a on which the rear end of the coil spring 96 is hooked and rotatably supported at an end portion of the outer surface of the conduction case 36a near the driven sprocket 91, and a spring. A tension applying piece 97c which is connected to the attachment piece 97b and disposed in the conductive case 36a. The tension applying piece 97c is disposed below the chain 92, and can come into contact with the chain 92 when the spring mounting piece 97b rotates with respect to the conductive case 36a.

  The tension applying mechanism 93 pulls the spring mounting piece 97b of the applying member 97 to the front side by the urging force of the coil spring 96, thereby pressing the tension applying piece 97c against the chain 92 from below to the chain 92. Apply tension. With such a configuration, the tension applying mechanism 93 can be easily assembled to the conductive case 36a and can save space. Further, the tension applying mechanism 93 can be made compact by providing the tension applying piece 97 c below the chain 92. Further, the tension applying mechanism 93 is provided with the tension applying piece 97c closer to the driven sprocket 91 than the drive sprocket 90, so that the tension applying piece 97c moves in the left-right direction when the planting partial clutch is turned on and off. Can be prevented. In addition, the tension applying mechanism 93 can change the strength of the tension applied to the chain 92 by expanding and contracting the adjuster rod 95 or rotating the support arm 94, so that an appropriate tension is applied to the chain at an appropriate timing. 92. Further, since the adjuster rod 95 is provided on the outer surface of the conductive case 36a, the tension applied to the chain 92 from the outside can be easily changed.

  The float 38 slides on the field with the movement of the traveling vehicle body 2 to level the ground. Three floats 38, one center float 38a provided at the center of the seedling planting portion 30 in the left-right direction of the traveling vehicle body 2, and side floats 38b, 38b provided on the left and right sides of the center float 38a, respectively. It consists of

  Moreover, each float 38a, 38b is rotatably attached so that a front end side may move up and down according to the unevenness | corrugation of the field topsoil surface. The seedling planting device 3 is provided with an angle-of-attack control sensor (not shown) that detects the vertical movement of the center float 38a. In the seedling planting device 3, the vertical movement of the front portion of the center float 38a is detected by the angle-of-attack control sensor at the time of planting work, and the hydraulic valve that controls the hydraulic lifting cylinder 34 is switched by the control device according to the detection result. By raising and lowering the seedling planting part 30, the seedling planting depth is always maintained constant. Moreover, the side float 38b can change the force which presses a front-end part to a farm field by drive sources, such as a motor which is not shown in figure. Further, a water depth sensor (not shown) capable of detecting the water depth of the farm field, a hardness sensor (not shown) capable of detecting the hardness of the farm field, and the like are attached to the side float 38b.

  The power transmission mechanism 4 includes a hydraulic continuously variable transmission 15 as a main transmission, a belt-type power transmission mechanism 16 that transmits driving force from the engine 11 to the hydraulic continuously variable transmission 15, a planting transmission mechanism, and the like. have. First, the hydraulic continuously variable transmission 15 will be described.

  The hydraulic continuously variable transmission 15 is configured as a hydrostatic continuously variable transmission called HST (Hydro Static Transmission). The hydraulic continuously variable transmission 15 includes a hydraulic pump that is driven by a driving force from the engine 11 and a hydraulic motor that outputs a mechanical force (rotational force) by the hydraulic pressure generated by the hydraulic pump. The hydraulic pressure generated by the hydraulic pump is used not only to operate the hydraulic motor but also to operate the hydraulic lifting cylinder 34 of the seedling raising / lowering mechanism 31 described later. The hydraulic continuously variable transmission 15 includes a swash plate (not shown) that can be tilted with respect to an input shaft of a hydraulic pump to which the driving force of the engine 11 is input, and a slant according to a target traveling speed of the traveling vehicle body 2. And a servo motor for changing the inclination angle of the plate. The swash plate is inclined with respect to the input shaft of the hydraulic pump to vary the flow rate of the hydraulic oil supplied from the hydraulic pump toward the hydraulic motor.

  The servo motor that changes the inclination angle of the swash plate is connected to the control device, and the control device changes the inclination angle of the swash plate by the servo motor in accordance with the target traveling speed of the traveling vehicle body 2. . Specifically, in the case of the stop position where the traveling vehicle body 2 is stopped, the control device causes the swash plate to be in a neutral state by the servo motor. Here, the neutral state of the swash plate is a state in which the angle formed between the swash plate and the input shaft is 90 °. When the control device sets the swash plate to the neutral state by the servo motor, the hydraulic pump sets the flow rate of the hydraulic oil supplied toward the hydraulic motor to zero.

  On the other hand, in the case of the forward position for moving the traveling vehicle body 2 forward, the control device changes the inclination angle of the swash plate to the positive side by the servo motor. Then, the hydraulic pump increases the flow rate of the hydraulic oil supplied toward the hydraulic motor so that the output shaft of the hydraulic motor rotates forward. On the other hand, in the case of the retracted position where the traveling vehicle body 2 is retracted, the control device causes the servo motor to change the inclination angle of the swash plate to the negative side. Then, the hydraulic pump increases the flow rate of the hydraulic oil supplied toward the hydraulic motor so that the output shaft of the hydraulic motor rotates in the reverse direction. In the hydraulic motor, the higher the flow rate of the hydraulic oil supplied, the higher the rotation speed of the output shaft.

  For this reason, the hydraulic continuously variable transmission 15 outputs the driving force of the engine 11 as a driving force that drives the traveling vehicle body 2 in the forward direction, outputs it as a braking force that stops the traveling vehicle body 2, 2 can be output as a driving force for driving in the backward direction.

  Again referring to FIG. 1, the hydraulic continuously variable transmission 15 is disposed in front of the engine 11 and below the floor surface of the floor step 20. In the embodiment, the hydraulic continuously variable transmission 15 is disposed in front of the engine 11 when viewed from the upper surface of the traveling vehicle body 2. Further, since the output shaft of the engine 11 protrudes from the left side of the traveling vehicle body 2, the hydraulic continuously variable transmission 15 is arranged close to the left side of the traveling vehicle body 2, and the input shaft 15 a is arranged on the left side of the traveling vehicle body 2. It protrudes from the direction.

  The belt-type power transmission mechanism 16 includes a pulley 41 attached to the output shaft of the engine 11, a pulley 42 attached to the input shaft 15 a of the hydraulic continuously variable transmission 15, and a belt 43 wound around both pulleys 41, 42. And. As a result, the belt-type power transmission mechanism 16 transmits the driving force generated by the engine 11 to the hydraulic continuously variable transmission 15 via the belt 43.

  Further, the power transmission mechanism 4 includes a transmission case (not shown) in which the driving force from the engine 11 is transmitted via the belt-type power transmission mechanism 16 and the hydraulic continuously variable transmission 15. The mission case is attached to the front portion of the main frame 10. In the transmission case, the driving force from the engine 11 transmitted through the belt-type power transmission mechanism 16 and the hydraulic continuously variable transmission 15 is shifted by the auxiliary transmission in the transmission case, and the front wheels 12a and 12a are shifted. The power for traveling to the rear wheels 12b, 12b and the power for planting to the seedling planting device 3 are output separately.

  Of these, the driving power is transmitted to the rear wheel 12b via a drive shaft (not shown) for supplying driving force to the rear wheel 12b provided on the traveling vehicle body 2 and left and right rear wheel gear cases 29. The driving power is transmitted to a front wheel differential device (not shown) and then transmitted to the front wheels 12a via the left and right front wheel final cases 28.

  The left and right front wheel final cases 28 are disposed on the left and right sides of the transmission case, respectively, and the pair of left and right front wheels 12a are connected to the left and right front wheel final cases 28 via front wheel side axles. Further, the front wheel final case 28 is driven in accordance with the steering operation of the handle 24 so that the front wheel 12a can be steered. Similarly, the rear wheel 12b is connected to the left and right rear wheel gear cases 29 via a rear wheel side axle.

  The planting power is transmitted to a planting clutch (not shown) of a planting transmission (not shown) provided at the rear portion of the traveling vehicle body 2, and the seedling planting device is engaged when the planting clutch is engaged. 3 is transmitted. The planting transmission mechanism transmits the driving force from the engine 11 to the seedling planting device 3 as planting power.

  The leveling device 5 is provided below the seedling planting unit 30 of the seedling planting device 3 and leveles the field. The leveling device 5 is provided in front of the lower frame 39 of the seedling planting unit 30 and supported by the lower frame 39.

  As with the floats 38a and 38b, the leveling device 5 is provided between the pair of side rotors 51 provided at the left and right ends of the traveling vehicle body 2 and the pair of side rotors 51 as shown in FIG. A center rotor 50 disposed in front of 51, and a pair of connecting transmission mechanisms 52 (corresponding to connecting members) that connect the left and right ends of the center rotor 50 and the pair of side rotors 51.

  The longitudinal direction of the center rotor 50 and the pair of side rotors 51 is arranged in parallel with the left-right direction, and is supported by the connecting transmission mechanism 52 so as to be rotatable about the axis. The pair of connection transmission mechanisms 52 rotate the center rotor 50 and the pair of side rotors 51 in conjunction with each other around the axis. The pair of coupling transmission mechanisms 52 are provided with a drive input shaft (not shown) to which the driving force from the engine 11 is transmitted. Thereby, both the center rotor 50 and the side rotor 51 can be rotated by the output from the engine 11.

  The leveling device 5 is provided so as to be movable up and down by a motor or a hanging frame attached to the planting frame 35 or the like.

  The control device controls the above-described components constituting the seedling transplanter 1. The control device includes, for example, shift control for controlling the hydraulic continuously variable transmission 15, lifting control for the seedling planting unit 30 by the seedling planting unit lifting mechanism 31, engine control for controlling the engine 11, and lifting control for the leveling device 5. Etc. are running.

  The control device raises the seedling planting unit 30 to the non-working position by the hydraulic lifting cylinder 34 during turning during planting work on the field based on the detection result from the detection sensor that detects the steering angle of the handle 24. The seedling planting unit 30 is lowered to the ground work position during the straight running during the planting work on the farm field.

  Further, the control device applies a tension that the applying member 97 applies to the chain 92 the support arm 94 of the tension applying mechanism 93 attached to the conduction case 36a of the planting mechanism 36 in which the planting partial clutch is disengaged by the partial changeover switch. Rotating in the weakening direction does not weaken the tension applied to the chain 92 by the applying member 97, or does not apply the tension to the chain 92 by separating the applying member 97 from the chain 92. For this reason, it is possible to prevent the driven sprocket 91 and the like from being burned by the idle rotation. Further, the control device is attached to the conduction case 36a of the planting mechanism 36 in which the planting partial clutch is engaged by the partial changeover switch as the seedling harvesting amount set by the seedling harvesting amount change switch increases. It is desirable to increase the tension that the applying member 97 applies to the chain 92 by rotating the support arm 94 of the tension applying mechanism 93 in a direction that increases the tension that the applying member 97 applies to the chain 92.

  Further, the control device weakens the force for pressing the front end portion of the side float 38b against the field as the traveling speed of the traveling vehicle body increases. For this reason, pushing the muddy water in the field can be reduced. Further, the control device may weaken the force of pressing the front end portion of the side float 38b against the field as the water depth increases based on the detection result of the water depth sensor. As the field becomes softer, the force for pressing the front end of the side float 38b against the field may be weakened.

  In the seedling transplanting machine 1 described above, when seedlings are planted in the field, the seedling planting device 3 is lowered to the ground work position (seedling planting position) by the operation of various operation levers by the operator. Then, the seedling transplanter 1 leveles the surface of the field by rotating the rotors 50 and 51 of the leveling device 5 while traveling in the field. The seedling transplanter 1 then rotates the rotation support portion 36b while rotating the rotation support portion 36b about the center while reciprocating the seedling placement table 61 of the seedling placement member 60 of the seedling planting portion 30 in the left-right direction. At both ends, the planting basket 36c rotates to plant seedlings in the field.

  In addition, when the seedling transplanter 1 finishes planting seedlings in the field, the seedling planting device 3 is raised to the non-working position by the seedling planting unit lifting mechanism 31 by the operation of various operation levers by the operator. And the seedling transplanter 1 moves between farm fields or moves outside the farm fields.

  As described above, according to the configuration of the seedling transplanter 1 of the present embodiment, since the first reinforcing member 80 that connects the sliding member 62 and the first support member 63 of the seedling placing table 61 is provided, the seedling is provided. The rigidity of the mounting table 61 can be improved. For this reason, it can suppress that the seedling mounting stand 61 is deformed and distorted by the urging force from the balance spring 65. Therefore, it is possible to prevent the urging force of the balance spring 65 from being different on the left and right, the planting depth of the seedlings to be different on the left and right of the traveling vehicle body 2, and the occurrence of the streak where seedlings cannot be planted. The attaching accuracy can be improved.

  In addition, the seedling transplanting machine 1 has the extended seedling mounting table 70 rotatably mounted on at least one of the left and right ends of the seedling mounting table 61. For this reason, the first reinforcing member 80 improves the rigidity of the seedling stage 61 even if the seedling stage 61 is moved to one side in the left-right direction and the extended seedling stage 70 is folded over a long period of time. It can suppress that the mounting base 61 deform | transforms with the urging | biasing force from the balance spring 65, and is distorted, and can improve the planting precision of a seedling.

  The seedling transplanter 1 is provided with the first reinforcing member 80 between the conveying belts 73 of the seedling conveying device 71 of the one-row seedling placing stand 68, so that the size of the seedling placing member 60 in the front-rear direction of the traveling vehicle body 2 is determined. It can suppress becoming large. Therefore, the enlargement of the seedling transplanter 1 itself can be suppressed.

  The seedling transplanter 1 forms the opening 82 that exposes the seedling amount detection member 74 in the wide portion 81 of the first reinforcing member 80, and thus suppresses a decrease in rigidity of the first reinforcing member 80 due to the provision of the opening 82. The seedling amount detection member 74 can be provided without doing so. For this reason, it can suppress that the seedling mounting stand 61 is deformed and distorted by the urging force from the balance spring 65. In addition, since the wide portion 81 of the first reinforcing member 80 is disposed inside the transport belt 73 of the seedling transport device 71, the wide portion 81 can be prevented from interfering with the transport belt 73, and the seedling stage 61 can be enlarged. Can be suppressed.

  In the seedling transplanting machine 1, since the regulating member 67 that suppresses the floating of the sliding member 62 is attached to the receiving member 66, the seedling placing table 61 can be prevented from floating due to the vibration of the traveling vehicle body 2. It is possible to suppress the loss of seedling planting.

  Further, since the regulating member 67 is arranged at a position spaced from the first reinforcing member 80, it is possible to suppress the range in which the seedling placing table 61 reciprocates, and the planting mechanism 36 removes seedlings from the seedling placing table 61. The timing to take can be maintained, and the decline in seedling planting accuracy can be suppressed. Moreover, since the seedling transplanter 1 has arranged the first reinforcing member 80 on the one-row seedling placing stand 68 at both ends of the seedling placing stand, the rigidity of the seedling placing stand 61 can be improved.

[Modification 1]
A seedling transplanter 1 according to Modification 1 of the embodiment of the present invention will be described with reference to FIG. FIG. 8: is the front view which looked at the seedling mounting member of the seedling transplanter which concerns on the modification 1 of embodiment from the front side. In FIG. 8, the same parts as those of the embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the seedling transplanting machine 1 according to the first modification of the embodiment, the seedling placing table 61 of the seedling placing member 60 includes five seedling placing stands 68 for one line, and does not include the extended seedling placing stand 70, so-called 5 It is of a striped plant. In the first modification of the embodiment, the first reinforcing member 80 is attached to the one-row seedling placing stand 68 in the center in the left-right direction, and the first reinforcing member 80 is disposed at the center in the left-right direction of the seedling placing stand 61. Yes. Since the seedling transplanting machine 1 according to the modification 1 of the embodiment can improve the seedling planting accuracy and arrange the first reinforcing member 80 at the center of the seedling placing table 61 as in the embodiment, The rigidity of the seedling support 61 can be improved with a simple configuration.

[Modification 2]
A seedling transplanter 1 according to Modification 2 of the embodiment of the present invention will be described with reference to FIG. FIG. 9: is the front view which looked at the seedling mounting member of the seedling transplanter which concerns on the modification 2 of embodiment from the front side. In FIG. 9, the same parts as those in the embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the seedling transplanting machine 1 according to the second modification of the embodiment, the seedling placing table 61 of the seedling placing member 60 includes six seedling placing stands 68 for one line, and does not include the extended seedling placing stand 70, so-called 6. It is of a striped plant. In the second modification of the embodiment, the first reinforcing member 80 is attached to the one-row seedling placing stand 68 at the right end, which is one end portion in the left-right direction of the seedling placing stand 61, and the left end as the other end portion and the left-right direction. A first reinforcing member 80 is attached to a single-row seedling placing stand 68 disposed between the center of the first seedling seedling. Thus, in the seedling transplanter 1 according to the second modification of the embodiment, the first reinforcing member 80 is disposed between one end portion in the left-right direction of the seedling mount 61 and the other end portion and the center. Has been. The seedling transplanter 1 according to the modified example 2 of the embodiment can improve the planting accuracy of the seedling as in the embodiment, and the first reinforcing member 80 is connected to one end portion of the seedling stage 61, Since it arrange | positioned between the other edge part and the center, the rigidity of the seedling mounting stand 61 can be improved with a simple structure.

[Modification 3]
A seedling transplanter 1 according to Modification 3 of the embodiment of the present invention will be described with reference to FIG. Fig.10 (a) is the front view which looked at the principal part of the seedling mounting member of the seedling transplanter which concerns on the modification 3 of embodiment from the front side, FIG.10 (b) concerns on the modification 3 of embodiment. It is side sectional drawing of the principal part of the seedling mounting member of a seedling transplanter. In FIG. 10, the same parts as those of the embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the seedling transplanter 1 according to the third modification of the embodiment, the seedling placement member 60 includes a first support member in addition to the first reinforcing member 80 as shown in FIGS. 10 (a) and 10 (b). 63 and a second support member 78 that connect the second support member 64 to each other. Since the seedling transplanter 1 according to the third modification of the embodiment connects the first support member 63 and the second support member 64 with the second reinforcing member 78, the rigidity of the seedling support 61 can be further improved. it can. For this reason, it can suppress that the seedling mounting base 61 is deform | transformed and distorted by the urging | biasing force from the balance spring 65, and can improve the seedling planting precision.

[Modification 4]
A seedling transplanter 1 according to Modification 4 of the embodiment of the present invention will be described with reference to FIG. FIG. 11: is sectional drawing seen from the side of the conduction case of the seedling planting part of the seedling transplanter which concerns on the modification 4 of embodiment. In FIG. 11, the same parts as those of the embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the seedling transplanter 1 according to Modification 4 of the embodiment, a plurality of spring mounting holes 97a (three in FIG. 10) are provided in the spring mounting piece 97b of the applying member 97 of the tension applying mechanism 93, and any one of them is provided. By attaching a coil spring 96 to the spring mounting hole 97a, the tension applied to the chain 92 can be adjusted. According to the seedling transplanter 1 according to the fourth modification of the embodiment, the tension applied to the chain 92 can be easily changed.

[Modification 5]
A seedling transplanter 1 according to Modification 5 of the embodiment of the present invention will be described with reference to FIG. FIG. 12: is sectional drawing seen from the side of the conduction case of the seedling planting part of the seedling transplanter which concerns on the modification 5 of embodiment. In FIG. 12, the same parts as those of the embodiment are denoted by the same reference numerals and the description thereof is omitted.

  In the seedling transplanter 1 according to the fifth modification of the embodiment, the tension applying mechanism 93 includes an applying spring 98 and a spring moving bolt 99. The applying spring 98 is attached to the bottom surface of the conductive case 36 a and is disposed below the chain 92. The giving spring 98 has one end attached to the rear end of the conduction case 36a and the other end slidably provided on the bottom surface of the conduction case 36a. The application spring 98 is provided with two curved portions 98a that protrude upward and push the chain 92 upward from below. The bending spring 98 applies tension to the chain 92 in the applying spring 98.

  The spring moving bolt 99 is attached to the bottom surface of the conduction case 36a in a state where the screw portion 99a abuts against the applying spring 98, and the spring moving bolt 99 is changed in the amount of screwing so that the screw portion 99a conducts. The amount of penetration into the case 36a is changed, and the applying spring 98 is moved in the vertical direction between a position indicated by a solid line and a position indicated by a two-dot chain line in FIG. The spring moving bolt 99 changes the tension applied to the chain 92 by the curved portion 98a of the applying spring 98 by changing the screwing amount. According to the seedling transplanter 1 according to the fifth modification of the embodiment, the tension applied to the chain 92 can be easily changed.

  In addition, this invention is not limited to the said embodiment and modification. That is, combinations can be changed or various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 2 Traveling vehicle body 36 Planting mechanism 60 Seedling placement member 61 Seedling stand 62 Sliding member 63 First support member 64 Second support member 65 Balance spring (posture holding member)
66 receiving member 67 regulating member 68 single seedling placing table 70 extended seedling placing table 71 seedling conveying device 73 conveying belt 74 seedling amount detecting member 78 second reinforcing member 80 first reinforcing member 81 wide portion 82 opening

Claims (9)

A seedling mounting member provided at the rear part of the traveling vehicle body so as to be reciprocally movable in the left-right direction and having a seedling mounting base for loading seedlings;
In a seedling transplanter equipped with a planting mechanism for taking seedlings from the seedling stage and planting them in a field,
The seedling placement member is
A sliding member provided extending in the left-right direction at the bottom of the seedling platform;
A first support member provided extending in the left-right direction at the vertical center of the seedling platform;
A posture holding member attached to the first support member and restricting the rotation of the seedling platform in the left-right direction;
A first reinforcing member that connects the sliding member and the first support member;
A seedling transplanter characterized by comprising: The seedling transplanting machine according to claim 1, wherein the seedling mounting member rotatably mounts an extended seedling mounting table on at least one of left and right end portions of the seedling mounting table. The seedling platform is
It is equipped with multiple 1-row seedling platforms for loading 1-row seedlings,
Each one-row seedling placing stand arranges the conveying belt of the seedling conveying device that moves the loaded seedlings downward at an interval in the left-right direction,
The seedling transplanter according to claim 1 or 2, wherein at least one of the plurality of single-row seedling platforms is provided with the first reinforcing member between the conveyor belts. The first reinforcing member is provided on the one-row seedling stage, exposes a seedling amount detection member for detecting that the number of loaded seedlings has decreased, and both ends in the left-right direction are the seedling conveying device. The seedling transplanter according to claim 3, wherein the opening is provided in a wide portion disposed inside the conveyor belt. The seedling placement member is
A receiving member that supports the sliding member of the seedling stand so as to be capable of reciprocating in the left-right direction;
A regulating member attached to the receiving member and regulating the lifting of the sliding member,
The said control member is arrange | positioned in the position spaced apart from the said 1st reinforcement member attached to the seedling mounting stand which reciprocates to the left-right direction. Any one of Claims 1-4 characterized by the above-mentioned. The seedling transplanter described in 1. The said 1st reinforcement member is arrange | positioned in the center of the left-right direction of the said seedling mounting stand. The seedling as described in any one of Claim 1, Claim 3, Claim 4, Claim 5 characterized by the above-mentioned. Transplanter. The said 1st reinforcement member is arrange | positioned between the one edge part of the left-right direction of the said seedling stand, and the other edge part and the center of the left-right direction. The seedling transplanter according to any one of claims 4 and 5. The said 1st reinforcement member is arrange | positioned at the right-and-left both ends of the said seedling stand, The seedling transplant as described in any one of Claim 1, Claim 3, Claim 4, Claim 5 characterized by the above-mentioned. Machine. The seedling placement member is
A second support member provided extending in the left-right direction above the seedling table;
The seedling transplanter according to any one of claims 1 to 8, further comprising a second reinforcing member that connects the first support member and the second support member.

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