JP6079970B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter such as a rice transplanter for transplanting rice seedlings or the like in a field.

  The seedling transplanter described in Patent Document 1 (paragraphs 0021 to 0024, FIG. 9) includes a planting main transmission shaft, a sub-transmission switching mechanism, and a brake mechanism in a transmission case. The transmission is switched.

Japanese Patent Laid-Open No. 2004-210061

  However, in the case of a seedling transplanter, a planting main transmission shaft for transmission to the seedling planting part is required in addition to the traveling sub-transmission switching mechanism and the differential device. In addition, extra transmission members such as gears are required, which increases the number of parts.

  In addition, the conventional auxiliary transmission switching mechanism is configured to perform switching by moving the shifter and engaging the driving gear at the planting speed and the driving gear on the roadside. It is necessary to chamfer the drive gear on the side and the drive gear on the roadside. As a result, when a high load is applied, the gear is disengaged, and there is a problem that the traveling transmission stops and cannot move.

  Therefore, it is a problem to be solved by the present invention to provide a seedling transplanter that solves the above problems.

The present invention has taken the following technical means to solve the above problems.
That is, the first aspect of the present invention, seedling planting unit (4) provided on the run line vehicle body (2), said vehicle body (2) and NaeUe mounting portion (4) the transmission case to transfer motion (12) the provided, said transmission case (12) before SL vehicle body (2) subtransmission switching mechanism for switching the traveling speed "road speed" corresponding to the planting work "planting speed", or corresponding to the road of the ( 71) provided with a, in front KinaeUe attaching portions (seedling transplanter provided with that planted to transfer kinetic main transmission shaft (82) to 4),
A sub-transmission switching shaft (72) that is transmitted at the rotational speed after the shift of the sub-transmission switching mechanism (71),
Planting main transmission shaft (82) one 且coaxially with said plant main transmission shaft (82) to relatively rotatably disposed, further,
The auxiliary transmission switching mechanism (71) is provided with a relay shaft (76) that transmits the driving force input to the transmission case (12), and is movable in the axial direction along the auxiliary transmission switching shaft (72). A switching member (73) is provided;
A transmission gear is provided on one side of the switching member (73), a first pawl clutch is provided on the other side,
A road speed transmission gear (75) that rotates integrally with the relay shaft (76) is provided, and the switching member (73) is moved so that the transmission gear and the road speed transmission gear (75) are engaged with each other to set the traveling speed to " When switching to `` speed '', the switching member (73) rotates and is transmitted to the auxiliary transmission switching shaft (72).
A planting speed transmission gear (74) that is coaxially rotatable on the planting main transmission shaft (82) is provided, and a second pawl clutch is provided on the planting speed transmission gear (74),
When the switching member (73) is moved to engage the first pawl clutch of the switching member (73) and the second pawl clutch of the planting speed transmission gear (74) to switch the traveling speed to the “planting speed”. The seedling transplanter is transmitted to the auxiliary transmission switching shaft (72) and the planting main transmission shaft (82) by rotating the switching member (73) .

Further, the invention according to claim 2 is provided with an inter-strain transmission mechanism (91) for changing a seedling planting interval of the seedling planting part (4) in the mission case (12), and the inter-strain transmission mechanism (91 ) And a transmission cover (92) covering the transmission case (12) is detachably provided, and when the transmission cover (92) is removed, the transmission mechanism (91) protrudes from the transmission case (12). The seedling transplanter according to claim 1, wherein:

According to a third aspect of the present invention, the traveling vehicle body (2) is provided with a hydraulic lifting cylinder (46) for lifting and lowering the seedling planting part (4), and on the left and right sides of the transmission case (12), The seedling transplanter according to claim 1 or 2, wherein a hydraulic oil tank (93) for storing hydraulic oil of the hydraulic lifting cylinder (46) is mounted.

Moreover, invention of Claim 4 provides the center float (55) and the side float (56, 56) which touch the field scene and equalize in the lower part of the said seedling planting part (4),
Front and rear central water flow grooves (57) are formed at the bottom of the center float (55), a deep groove part (57a) from the front end of the center float (55), and a shallow groove part provided behind the deep groove part (57a). (57c) and an inclined portion (57b) connecting the deep groove portion (57a) and the shallow groove portion (57c), and left and right soil covering members (94, 94) at the front and rear centers of the center float (55). And arranging the front and rear positions of the rear end portions of the left and right soil covering members (94, 94) so as to be the same as the rear end portion of the inclined portion (57b),
Front and rear water flow grooves (56a) are formed at the bottom of the side float (56), and the inner bottom surface (56b) on the inner side of the fuselage among the left and right bottom surfaces (56b, 56c) sandwiching the water flow groove (56a). The seedling transplanting machine according to any one of claims 1 to 3, wherein the seedling transplanting machine is formed above an outer bottom surface (56c) outside the machine body.

(Delete)

According to the first aspect of the invention, auxiliary transmission switching shaft for transmission at a rotation speed after speed change (72), 且 one main transmission shaft (82) in relatively rotatable coaxially on a main transmission shaft (82) by providing a main transmission shaft (82) there is no need to separately provide a space for arranging the miniaturization of the transmission case (12) is achieved.

In addition, the transmission gear provided on the switching member (73) and the road speed transmission gear (75) are meshed to switch the traveling speed to “road speed”, and the first clutch pawl and planting speed provided on the switching member (73). by switching the second traveling speed to engage the clutch pawls provided in the transmission gear (74) to the "planting speed", it may be Hodokose chamfering only the tooth merging intends transmission gear meshing with road speed transmission gear 75, the high load is prevented from being missing gear upon Tsu written, the running conditions have stabilized.

According to the second aspect of the invention, in addition to the effect of the invention according to claim 1, by removing the strain between the transmission cover (92), the strains transmission mechanism (91) protrudes from the transmission case (12) Accordingly, Runode can maintenance procedures other takes the member outer score and Do rather strain between transmission mechanism (91), thus improving maintainability.

According to the third aspect of the invention, in addition to the effect of the invention according to claim 1 or 2, by mounting the work dynamic oil tank (93) to one lateral side of the transmission case (12), work since the dynamic oil tank (93) can be mounted on the body upper side, ground clearance is high in the vehicle body (2), members to come in contact with the ground or water surface Ru is prevented from being damaged.

According to the invention of claim 4 , in addition to the effects of the invention of any one of claims 1 to 3 , the front and rear water flow grooves (56a) are formed at the bottom of the side float (56). By forming the inner bottom surface (56b) on the inner side of the fuselage out of the left and right bottom surfaces (56b, 56c) sandwiching the water flow groove (56a) above the outer bottom surface (56c) on the outer side of the fuselage The water that has entered the water flow groove (56a) can easily move toward the inside of the aircraft. This prevents the seedlings planted in the position adjacent to the work strip from being washed away by the water flow from the side float (56), eliminating the need for the operator to manually replant the seedlings, and the labor of the operator Is reduced.

Further, a rear end portion of the deep groove portion in the center through the water groove (57) of the center float (55) (57a) and shallow groove (57c) and the inclined portion connecting the (57 b), the rear end portion of the soil cover member (94) By arrange | positioning so that the front-back position may become the same, the momentum of the muddy water flow which comes out from a central water flow groove (57) can be suppressed, and it can prevent that the planted seedling is pushed away by a muddy water flow.

It is a side view of the seedling transplanter concerning a first embodiment of the present invention. It is a top view of the seedling transplanting machine of FIG. It is a top view showing the transmission mechanism to the drive wheel in the mission case of the seedling transplanter of FIG. It is operation | movement explanatory drawing of the subtransmission mechanism in the mission case of FIG. It is a top view showing the transmission mechanism to the planting transmission shaft in the mission case of FIG. FIG. 4 is a side view of the mission case of FIG. 3. It is the top view and rear view of the side float of the seedling transplanter of FIG. It is the top view and side view of the center float of the seedling transplanter of FIG. It is a rear view of the seedling planting part of the seedling transplanter according to the second embodiment. It is a side view of the seedling planting part of FIG. It is the side surface partial enlarged view of the seedling planting part of FIG. It is a side view of the fertilization hose of the seedling transplanter concerning a third embodiment. It is a side surface partial enlarged view of the seedling planting part of the seedling transplanting machine concerning 4th embodiment.

  Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings. The forward and backward directions and the left and right directions are based on the forward direction of the seedling transplanter.

  FIG. 1 is a side view of a six-row seedling transplanter according to the first embodiment of the present invention, and FIG. 2 is a plan view. In the seedling transplanting machine according to the first embodiment of the present invention, a seedling planting unit 4 is mounted on the rear side of the traveling vehicle body 2 so as to be movable up and down via the lifting link mechanism 3, and the fertilizer device 5 is disposed on the rear upper side of the traveling vehicle body 2. Main body portion is provided.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed in the front part of the fuselage. A front wheel final case 13 is provided on the left and right sides of the left and right front wheels 10, and the left and right front wheels 10 are respectively attached to left and right front wheel axles that project outward from respective front wheel support portions that can change the steering direction of the left and right front wheel final case 13. ing.

  The front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and the rear wheel gear case 18 is freely rotatable with a rear wheel rolling shaft provided horizontally in the front and rear sides at the center of the rear end of the main frame 15 as a fulcrum. The rear wheel 11 is attached to a rear wheel axle that is supported by the rear wheel and protrudes outward from the rear wheel gear case 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via the belt transmission device 21 and the HST 23.

  The rotational power transmitted to the mission case 12 is shifted by the transmission in the mission case 12, and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final case 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear case 18 to drive the rear wheels 11 and 11.

  Further, the external take-out power is transmitted to the seedling planting part 4 by the planting transmission shaft 26 and is also transmitted to the fertilizer application device 5 by the fertilization transmission mechanism. The configuration inside the mission case 12 will be described later.

  The upper part of the engine 20 is covered with an engine cover 30, and a driver's seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the driver seat 31, and a steering handle 34 for steering the front wheels 10 is provided above the front cover 32.

  The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking on the floor step 35 falls into the field.

  The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. The upper link 40 and the lower link 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected at the rear end of the main frame 15, and the vertical link 43 is connected to the front end side thereof. Has been. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44.

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

  The seedling planting section 4 has a six-row planting structure, a planting transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings one by one to the seedling outlet 51a of each row. When all the seedlings for one row are supplied to the seedling outlet 51a, the seedling placement unit 51 that transports the seedlings downward by the seedling feeding belt 51b, and the seedling supplied to the seedling outlet 51a is planted in the field by the seedling planting tool 54. A seedling planting device 52 and a pair of left and right line drawing markers 19 for drawing the aircraft path in the next process to the topsoil surface are provided.

  The rear portion of the planting transmission case 50 is branched into three, and a planting drive shaft is rotatably supported at each branched rear end portion, and a rotary case is mounted on the left and right projecting portions of the planting drive shaft. The center part of 16 is fixedly attached by the structure which rotates integrally. Further, a planting rotation shaft is rotatably supported at both ends of the rotary case 16, and a seedling planting tool 54 is attached to each of these two planting rotation shafts.

  In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 56, 56 in contact with the mud surface of the farm field, the floats 55, 56, 56 slide while leveling the mud surface, and the seedling planting device 52 uses the seedling planting device 52 on the ground level. Seedlings are planted.

  Each of the floats 55 and 56 is rotatably attached so that the front end side thereof moves up and down corresponding to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor ( The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 in accordance with the detection result to raise and lower the seedling planting unit 4. .

  The fertilizer application device 5 feeds the granular fertilizer stored in the fertilizer tank 60 by a certain amount by the feeding unit 61, and applies the fertilizer to the left and right sides of the center float 55 and the side floats 56, 56 with the fertilizer hose 62. It guides to (not shown), and it is the structure dropped into the fertilization structure formed in the side part vicinity of a seedling planting row | line | column by the groove body (not shown) provided in the front side of the fertilization guide. A configuration in which the air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 via the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forcibly conveyed by wind pressure. It has become.

  A leveling rotor 27 (a combination of the first leveling rotor 27a and the second leveling rotor 27b is simply referred to as leveling rotor 27) is attached to the seedling planting portion 4. The seedling placement unit 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the up-down direction that supports the entire seedling planting unit 4 as a rail.

  On the left and right sides of the front part of the traveling vehicle body 2, a pair of spare seedling frames 38 on which supplementary seedlings are placed are provided.

  FIG. 3 is a plan view showing the transmission mechanism to the drive wheels in the mission case 12 of the seedling transplanter according to the first embodiment of the present invention. Although the actual transmission shafts are not arranged on the same plane, they are displayed as arranged on the same plane for the purpose of explaining the transmission mechanism. In FIG. 3, the upward direction in the drawing is the right side of the vehicle body, and the downward direction is the left side of the vehicle body.

  The mission case 12 receives the rotational power from the HST 23 by the mission input shaft 83 and drives the front wheels 10 and 10 and the rear wheels 11 and 11 as driving wheels via the auxiliary transmission switching mechanism 71, the differential device 85 and the like.

  The sub-transmission switching mechanism 71 switches the traveling state of the traveling vehicle body 2 to “planting speed”, “road speed”, and “traveling neutral”. In this embodiment, the sub-transmission switching mechanism rotates at the rotational speed after the shift. The shaft 72, a switching member 73 fitted to the auxiliary transmission switching shaft 72, a planting speed transmission member 74, a road speed transmission member 75, and a relay shaft 76 are configured. The traveling state is changed by changing the ratio of the rotational speeds of the relay shaft 76 and the auxiliary transmission switching shaft 72. The sub-transmission switching shaft 72 and the switching member 73 can be operated in the axial direction of the sub-transmission switching shaft 72 by a spline, and the operator operates the sub-transmission lever (not shown) to operate the switching member 73. 2 is switched.

  The relay shaft 76 has two gears with different diameters, one of which receives the rotational power from the mission input shaft 83. Of the two gears, the one with the larger diameter is a road speed transmission member 75, which meshes with the gear of the switching member 73 when the traveling transmission state is “road speed”. A thing with a small diameter always meshes with the planting speed transmission member 74. By this meshing, the relay shaft 76 transmits power to the planting speed transmission member 74 and the road speed transmission member 75.

  The planting speed transmission member 74 meshes with a gear having a small diameter of the relay shaft 76 and is provided on the right side coaxial with the auxiliary transmission switching shaft 72. The planting speed transmission member 74 and the auxiliary transmission switching member 72 are configured to be relatively rotatable with each other by a metal bearing. In addition, a planting main transmission shaft 82 that transmits a driving force to the seedling planting unit 4 is coupled to the planting speed transmission member 74 so as to rotate coaxially. By doing so, the planting main transmission shaft 82 can be rotated relative to each other on the same axis as the auxiliary transmission switching shaft 72.

  On the right side surface of the switching member 73, a meshing portion of a claw clutch for coupling with the planting speed transmission member 74 is provided, and teeth that mesh with the road speed transmission member 75 are formed on the outer periphery.

  A part of the rotational power from the auxiliary transmission switching shaft 72 is distributed and transmitted to the left and right front wheel axles 84, 84 by the differential device 85, and further transmitted to the front wheel final cases 13, 13 by the front wheel axles 84, 84. 10 and 10 are driven. Rear-wheel driving power taken out from the rear surface of the transmission case 12 through the left and right front wheel axles 84 and 84 is transmitted to the rear wheel gear cases 18 and 18 through the rear wheel transmission shafts 86 and 86, and the rear wheel 11. , 11 are driven. The transmission case 12 is provided with a brake device 81 that restricts the rotation of the front wheels 10 and 10 and the rear wheels 11 and 11 on the left side of the auxiliary transmission switching shaft 72.

  FIG. 4 shows an operation explanatory diagram of the auxiliary transmission mechanism in the mission case 12 of FIG. 4A is an engagement diagram when the traveling state of the traveling vehicle body 2 is “road speed”, FIG. 4B is an engagement diagram when “traveling neutral” is illustrated, and FIG. It is a meshing figure in case (c) is "planting speed". In FIG. 4, the upper direction of the drawing is the right side of the vehicle body, and the lower direction is the left side of the vehicle body.

  In the case of “road speed”, the teeth on the outer periphery of the switching member 73 mesh with the teeth of the road speed transmission member 75 of the relay shaft 76. With this configuration, rotational power is transmitted to the switching member 73, and the auxiliary transmission switching shaft 72 meshed with the switching member 73 by the spline rotates together with the switching member 73, and the differential device is driven by the gear located on the left side of the switching member 73. Rotational power is transmitted to 85. At this time, the planting speed transmission member 74 is rotated by the relay shaft 76, but rotates at a different rotational speed from the auxiliary transmission switching shaft 72 that is relatively rotatable.

  In the case of “traveling neutral”, the switching member 73 does not mesh with either the planting speed transmission member 74 or the road speed transmission member 75. Although the planting speed transmission member 74 is rotated by the relay shaft 76, the auxiliary transmission switching shaft 72 to which the rotational power is not transmitted remains stopped. At this time, since the planting speed transmission member 74 and the planting main transmission shaft 82 are coupled so as to rotate coaxially, only the seedling planting portion 4 can be operated.

  In the case of “planting speed”, the right side of the switching member 73 meshes with the left side of the planting speed transmission member 74 by a claw clutch and is connected to each other. The planting speed transmission member 74 is rotated by the relay shaft 76, the switching member 73 connected by the claw clutch is rotated, and the auxiliary transmission switching shaft 72 that is meshed with the switching member 73 by the spline is further rotated. Is transmitted from the relay shaft 76 to the auxiliary transmission switching shaft 72, and the rotational power is transmitted to the differential device 85 by the gear located on the left side of the switching member 73.

  By arranging the planting main transmission shaft 82 on the same axis of the auxiliary transmission switching shaft 72 and so as to be rotatable relative to each other, it is not necessary to provide a space for arranging the transmission shaft, and the transmission case 12 can be downsized. Can do. Moreover, it is not necessary to provide a transmission member, and the number of parts can be reduced.

  By connecting the switching member 73 and the planting speed transmission member 74 with a claw clutch, the chamfering applied to the meshing gear is only required on one side, and there is no gear loss when a high load is applied. The running state is stable.

  FIG. 5 is a plan view showing a transmission mechanism to the planting transmission shaft in the mission case 12 of FIG. As in FIG. 3, the actual transmission shafts are not arranged on the same plane, but are illustrated as arranged on the same plane for the description of the transmission mechanism, and the upper direction of the drawing is the traveling vehicle body 2. The right and down direction are the left side of the car body.

  The mission case 12 includes a planting transmission shaft 26 that transmits a driving force to the seedling planting unit 4, and a planting main transmission shaft 82 coupled to the planting transmission shaft 26 and a planting speed transmission member 74. In between, the strain transmission mechanism 91 which changes the planting space | interval of the seedling of the seedling planting part 4 is provided. The inter-strain transmission mechanism 91 changes the meshing of the plurality of gears to change the rotational speed ratio between the planting main transmission shaft 82 and the planting transmission shaft 26. And the inter-strain transmission cover 92 is detachably provided so as to cover the inter-strain transmission mechanism 91.

  Since the inter-strain transmission cover 92 that covers the inter-strain transmission mechanism 91 provided in the mission case 12 is detachably provided, the inter-strain transmission mechanism 91 is exposed when the inter-strain transmission cover 92 is removed. Therefore, maintenance work of the inter-train transmission mechanism 91 can be performed without removing extra members, and the maintainability is improved.

  FIG. 6 shows a side view of the mission case 12 of FIG. 3 viewed from the left side of the fuselage. Conventionally, the hydraulic oil tank 93 that has been provided at the front of the mission case 12 so as to project downward from the mission case 12 is not projected from the lower surface of the mission case 12 to the left side of the mission case 12. Provide. This hydraulic oil tank 93 is for storing hydraulic oil such as a seedling planting part.

  By connecting a hydraulic oil tank 93 for storing hydraulic oil, such as the seedling planting part 4, to the left and right sides of the mission case 12, the mounting position of the hydraulic oil tank 93 that has conventionally been arranged below the mission case 12 is raised. Can do. Thereby, the minimum ground clearance of the traveling vehicle body 2 can be raised, and damage to the member due to contact with the ground or the water surface can be prevented.

  7A shows a plan view of the side float 56 of the seedling transplanter of FIG. 1, and FIG. 7B shows a rear view. In FIG. 7A, the upper side is the front side of the traveling vehicle body 2, and when the traveling vehicle body 2 moves forward, the water flow indicated by the arrows in the drawing is generated in the side float 56. At the bottom of the side float 56, a water flow groove 56a is formed along the front and rear sides of the side float 56. Further, of the left and right bottom surfaces 56b and 56c sandwiching the water flow groove 56a, an inner bottom surface 56b inside the body is formed. It is formed so as to be above the outer bottom surface 56c outside the machine body.

  Front and rear water flow grooves 56a are formed at the bottom of the side float 56, and among the left and right bottom surfaces 56b and 56c sandwiching the water flow groove 56a, the inner bottom surface 56b on the inner side of the body is more than the outer bottom surface 56c on the outer side of the body. By forming upward, the water that has entered the water flow channel 56a can easily move toward the inside of the machine body. This prevents seedlings planted at positions adjacent to the work strips from being washed away by the water flow from the side float 56, eliminating the need for the operator to manually replant the seedlings and reducing the labor of the workers. Is done.

  FIG. 8A shows a plan view of the center float 55 of the seedling transplanter in FIG. 1, and FIG. 8B shows a right side view. In FIG. 8A, the left side is the front side of the traveling vehicle body 2, and when the traveling vehicle body 2 moves forward, a water flow indicated by an arrow in the figure is generated in the center float 55. The center float 55 has a left and right width behind the float rotation fulcrum, that is, behind the center center of the center float 55 in order to prevent interference with the seedling planting device 52 of the seedling planting unit 4 and fertilizer. Left and right widths of the soil covering members 94, 94 for embedding in the field. At the bottom of the center float 55, a central water passage 57 before and after the muddy water passes is formed. The central water passage 57 smoothly connects the deep groove portion 57a from the front end of the center float 55 to the vicinity of the front and rear center of the center float 55, the shallow groove portion 57c provided behind the deep groove portion 57a, and the deep groove portion 57a and the shallow groove portion 57c. It is comprised by the inclination part 57b for connecting. Further, left and right soil covering members 94, 94 are arranged at the front and rear centers of the center float 55, and the front and rear positions of the rear end portions of the left and right soil covering members 94, 94 are the same as the rear end portions of the inclined portion 57b. To do.

  By arranging the rear end portion of the inclined portion 57b connecting the deep groove portion 57a and the shallow groove portion 57c in the central water flow groove 57 of the center float 55 and the rear end portion of the covering soil member 94 so as to be the same, The momentum of the muddy water flow coming out of the water groove 57 can be suppressed, and the planted seedling can be prevented from being washed away by the muddy water flow.

  9 is a rear view of the seedling planting unit 4 of the seedling transplanter according to the second embodiment, FIG. 10 is a side view of the seedling planting unit 4, and FIG. Show. The seedling planting unit 4 according to the present embodiment is provided with a plurality of seedling tank inner covers 104,... On a single horizontal frame 101 made of aluminum, in front of and below the seedling placement unit 51. One of the seedling tank inner covers 104 prevents droplet mud from adhering to the seedling feeding cam 102 that drives the seedling feeding belt 51 b of the seedling placement unit 51. Further, another seedling tank inner cover 104 prevents droplet mud from adhering to the lead cam 103 for operating the seedling placement portion 51 to the left and right.

  In FIG. 12, the side view of the fertilization hose 62 of the seedling transplanter concerning 3rd embodiment is shown. The fertilization relief hose 105 of the relief part of the fertilization hose 62 concerning this embodiment is comprised with rubber | gum. This prevents water from entering the fertilizer hose 62 from the relief portion during cleaning with high-pressure water. Moreover, the direction can be easily changed, and even when fertilizer is ejected, the fertilizer can be sprayed on the field. It is also possible to reduce the opening diameter of the fertilization relief hose 105 on the release side. This prevents water from entering.

  In FIG. 13, the side surface partial enlarged view of the seedling planting part 4 of the seedling transplanter concerning 4th embodiment is shown. In the present embodiment, the fertilization hose 62 passes between the horizontal frame 101 constituting the seedling planting unit 4 and the seedling feeding cam shaft 106. With this configuration, it is possible to prevent the fertilization hose 62 and the seedling feeding arm 107 from interfering with each other regardless of the position of the seedling feeding arm 107.

1 Seedling transplanter 2 Traveling vehicle body 4 Seedling planting part 10 Front wheel 11 Rear wheel 12 Mission case
46 Lifting hydraulic cylinder 55 Center float 56 Side float 56a Water flow groove 56b Inner bottom surface 56c Outer bottom surface 57 Central water flow groove 57a Deep groove portion 57b Inclined portion 57c Shallow groove portion 71 Sub transmission switching mechanism 72 Sub transmission switching shaft 73 Switching member 74 Planting speed Transmission member 75 Road speed transmission member 76 Relay shaft 81 Brake device 82 Planting main transmission shaft 91 Stock transmission mechanism 92 Stock transmission cover 93 Hydraulic oil tank 94 Covering member

Claims (4)

To run the line body (2) provided seedling planting unit (4), said vehicle body (2) and NaeUe with unit transmission case (12) to transfer motion to (4) is provided, on the transmission case (12) with pre SL running speed of the vehicle body (2) corresponds to the planting work "planting speed", or corresponding to the road switch to "road speed" provided subtransmission switching mechanism (71), before KinaeUe in seedling transplanter provided with that planted to transfer kinetic main transmission shaft (82) to the attachment portions (4),
A sub-transmission switching shaft (72) that is transmitted at the rotational speed after the shift of the sub-transmission switching mechanism (71),
Planting main transmission shaft (82) one 且coaxially with said plant main transmission shaft (82) to relatively rotatably disposed, further,
The auxiliary transmission switching mechanism (71) is provided with a relay shaft (76) that transmits the driving force input to the transmission case (12), and is movable in the axial direction along the auxiliary transmission switching shaft (72). A switching member (73) is provided;
A transmission gear is provided on one side of the switching member (73), a first pawl clutch is provided on the other side,
A road speed transmission gear (75) that rotates integrally with the relay shaft (76) is provided, and the switching member (73) is moved so that the transmission gear and the road speed transmission gear (75) are engaged with each other to set the traveling speed to " When switching to `` speed '', the switching member (73) rotates and is transmitted to the auxiliary transmission switching shaft (72).
A planting speed transmission gear (74) that is coaxially rotatable on the planting main transmission shaft (82) is provided, and a second pawl clutch is provided on the planting speed transmission gear (74),
When the switching member (73) is moved to engage the first pawl clutch of the switching member (73) and the second pawl clutch of the planting speed transmission gear (74) to switch the traveling speed to the “planting speed”. The seedling transplanter is transmitted to the auxiliary transmission switching shaft (72) and the planting main transmission shaft (82) by rotating the switching member (73) . The transmission case (12) before KinaeUe toothed portion between strains transmission mechanism for changing the planting spacing of seedlings (4) (91) provided within, strains transmission cover (92 covering the strains transmission mechanism (91) ) is provided detachably on the transmission case (12), according to claim 1 removing the strain between the transmission cover (92) strains transmission mechanism (91) is characterized in that projecting from the transmission case (12) Seedling transplanter. A hydraulic elevating cylinder (46) for elevating the seedling planting part (4) is provided on the traveling vehicle body (2),
Right and left one side of the transmission case (12), seedlings transplanted according to claim 1 or 2, characterized in that wearing the hydraulic oil tank (93) for storing the hydraulic oil of the hydraulic lifting cylinder (46) Machine. A center float (55) and a side float (56, 56) are provided at the lower part of the seedling planting part (4) for grounding and leveling the field scene,
Front and rear central water flow grooves (57) are formed at the bottom of the center float (55), a deep groove part (57a) from the front end of the center float (55), and a shallow groove part provided behind the deep groove part (57a). (57c) and an inclined portion (57b) connecting the deep groove portion (57a) and the shallow groove portion (57c), and left and right soil covering members (94, 94) at the front and rear centers of the center float (55). And arranging the front and rear positions of the rear end portions of the left and right soil covering members (94, 94) so as to be the same as the rear end portion of the inclined portion (57b),
Forming a longitudinal water passage grooves (56a) in the bottom of the side floats (56), a bottom (56b, 56c) of the left and right sandwiching the vent water groove (56a) of the body inside the inner bottom surface (56b) The seedling transplanting machine according to any one of claims 1 to 3 , wherein the seedling transplanting machine is formed above an outer bottom surface (56c) outside the machine body.