KR101326714B1 - Walking type rice planting machine - Google Patents

Abstract

The transmission mechanism 7 changes the speed ratio of the power transmitted to the left wheel 4L and the right wheel 4R by sliding in the axial direction, and rotates around the axis to rotate the rotation mechanism around the planting device ( 5) a shift shifting shaft 411 for shifting the shift ratio of the power transmitted to 5) and a traveling shift lever 437 disposed at a position where the operator touches the plant during the planting operation and sliding the shift shifting shaft 411 in the axial direction; And a weekly shift lever 435 which is disposed at a position out of reach of an operator in planting work and which rotates the shift operation shaft 411 around the axis.

Description

Walking type rice transplanter {WALKING TYPE RICE PLANTING MACHINE}

The present invention relates to a technique of a walking type rice transplanter. More specifically, the present invention relates to a technique for changing the change in the traveling speed and the change in the daytime of the walking type rice transplanter into separate operating tools.

Conventionally, a transmission mechanism for shifting the driving force of the engine and transmitting it to the wheels, that is, changing the traveling speed, and shifting the driving force of the engine to the planting device, that is, changing the daytime, is provided. A walking rice transplanter is known.

One example of such a walking type rice transplanter includes a transmission mechanism accommodated mainly in a mission case and two transmission shafts protruding from the mission case. It is possible to change the traveling speed by operating one of the two transmission shafts, and it is possible to change the daytime by operating the other transmission shaft.

Such walking type rice transplanters need to prevent the occurrence of oil leakage due to the ingress of mud or dust into the sliding portion of the shift shaft and the mission case, and the intrusion of mud or dust from the sliding portion into the mission case. There was.

As another example of the walking type rice transplanter, the technique of patent document 1 is known.

The walking type rice transplanter described in patent document 1 protrudes from a mission case, changes the running speed when it slides in the axial direction, and the shift shaft which changes a day when it rotates around an axis, and is working It is provided with the traveling operation tool which is arrange | positioned in a position which can be operated from an operator, and slides a transmission shaft in an axial direction, and the weekly operation tool which is arrange | positioned in the position which can be operated by an operator in operation, and rotates a transmission shaft around an axis.

In this way, by using one shifting shaft that protrudes from the mission case, the possibility of mud and dust getting into the shifting shaft and the sliding part of the mission case is reduced, so that an oil leak occurs, mud, dust, etc. into the inside of the mission case. Intrusion suppression can be aimed at.

However, in the case of the walking type rice transplanter described in Patent Literature 1, since two operation tools for driving the shifting shaft and a weekly operation tool are arranged around the operator, the mother planting work is in full swing. The operator may decide which of the two operating tools should be operated according to the purpose, and the operator needs to hold the selected operating tool and operate it, or the operation tool may be misoperated. It was disadvantageous in that it was troublesome and worsened workability.

Moreover, as another example of the walking type rice transplanter which solves the subject which the walking type rice transplanter of patent document 1 has, the technique of patent document 2 is known.

The walking type rice transplanter of patent document 2 is equipped with one shift operation tool which changes a daytime by operating in a left-right direction while changing a running speed by operating in an up-down direction.

As described above, since the traveling speed can be changed and the weekly can be changed by operating one shift operation tool, the number of operation tools arranged around the operator can be reduced, and the operability can be improved.

However, in the case of the walking type rice transplanter described in patent document 2, since the change of a traveling speed and the change of a day are performed with one shift control tool, the operation method of a shift control tool becomes complicated and workability deteriorates. In particular, in the simulated planting work in a pavement, although the driving speed is often changed in the middle of the work, the weekly change is rarely performed in the middle of the work. That is, even though the weekly change is not made during the work, the weekly change is possible around the worker, and thus there is a problem that the operation method of the shift operation tool is more complicated than necessary. In addition, when the traveling speed is changed during the planting work or the mother's food is supplied, the operator may forget the week before the change, and the day may be changed during the work on the same pavement. There was also concern.

Patent Document 1: Japanese Utility Model Publication No. 59-81310 Patent Document 2: Japanese Patent Application Laid-Open No. 8-214649

An object of the present invention is to provide a walking type rice transplanter capable of easily and accurately changing the running speed and changing the daytime, thereby improving workability.

The problem to be solved by the present invention is as described above, and means for solving the problem will be described.

That is, in this invention, it is a walking type rice transplanter provided with the planting apparatus which transplants a grain in a pavement, and the transmission mechanism which transmits the power transmitted from an engine, and transmits to a wheel and a planting apparatus, and is an axial direction. The shift operation shaft which changes the transmission ratio of the power transmitted by the power mechanism to the wheel by sliding operation, and the transmission operation shaft which changes the transmission ratio of the power transmitted by the electric mechanism to the planting device by rotating around the axis, and hands from the worker in planting operation And a first operating tool for sliding the shifting operation shaft in the axial direction, and a second operating tool for rotating the shifting operation shaft around the axis, the first operating tool being disposed at the touching position and being out of reach of the worker in planting operation. It is.

In the present invention, the speed change ratio of the power transmitted by the power mechanism to the wheel based on the position of the instruction member moving in the axial direction of the shift operation shaft or rotating around the axis, in conjunction with the shift operation shaft, and the transmission It is provided with the display member which displays the gear ratio of the power which a mechanism transmits to a planting apparatus.

According to the present invention, it is possible to easily and accurately change the running speed and the change of the day, and thus the workability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a left front perspective view which shows one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a right rear perspective view which shows one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a left side view which shows one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a top view which shows one Embodiment of the walking type rice transplanter which concerns on this invention.
5 is an exploded perspective view showing a body of one embodiment of a walking type rice transplanter according to the present invention.
It is a skeleton diagram which shows the transmission mechanism of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is an expanded sectional view which shows the mission case of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the center float of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the left side float and the right side float of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a schematic diagram which shows the pitching control mechanism of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the pump unit of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the pitching sensor of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the pitching cylinder of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the swing device of one embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the stand of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a perspective view which shows the main clutch of one embodiment of the walking type rice transplanter which concerns on this invention.
(A) is a left side view which shows the main clutch of one embodiment of the walking type rice transplanter which concerns on this invention, (b) is a front view which shows the main clutch of one embodiment of the walking type rice transplanter which concerns on this invention. to be.
It is a perspective view which shows the operation mechanism of one Embodiment of the walking type rice transplanter which concerns on this invention.
(A) is exploded perspective view which shows the engaging member of one Embodiment of the walking type rice transplanter which concerns on this invention, (b) is sectional drawing which shows the engaging member of one Embodiment of the walking type rice transplanter which concerns on this invention. to be.
It is a left side view which shows the wire member of one Embodiment of the walking type rice transplanter which concerns on this invention, when the main clutch is set to "ON".
It is a left side view which shows the wire member of one Embodiment of the walking type rice transplanter which concerns on this invention, when the main clutch is set to "OFF."
It is a left side view which shows other embodiment of the operation mechanism of the walking type rice transplanter which concerns on this invention.
It is an exploded perspective view which shows the transmission mechanism of one Embodiment of the walking type rice transplanter which concerns on this invention.
24 is a left side cross-sectional view illustrating a transmission mechanism of one embodiment of the walking type rice transplanter according to the present invention.
25 is a plan sectional view illustrating a transmission mechanism of one embodiment of the walking type rice transplanter according to the present invention.
It is an exploded perspective view which shows the shift operation mechanism of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a top view which shows the speed change control mechanism of one Embodiment of the walking type rice transplanter which concerns on this invention.
It is a left side view which shows the transmission operation mechanism of one Embodiment of the walk type rice transplanter which concerns on this invention.

Hereinafter, the whole structure of the walking type rice transplanter 1 which is one Embodiment of the walking type rice transplanter which concerns on this invention is demonstrated.

The walking type rice transplanter 1 of this embodiment shown in FIG. 1 is a walking type rice transplanter of what is called 4 sets planting. As shown in FIGS. 1-7, 10, 15, 16, 23, and 26, the walking type rice transplanter 1 mainly comprises the body 2 (refer FIG. 5), the engine 3, the left wheel. 4L, right wheel 4R, planting device 5 (see FIGS. 6 and 7), mother feeder 6, power mechanism 7 (see FIGS. 6 and 7), center float 10C , Left side float 10L, right side float 10R, pitching control mechanism 11 (see FIG. 10), stand 15 (see FIG. 15), main clutch 16 (see FIG. 16), control panel ( 17), the transmission mechanism 12 (see FIG. 23) and the shift operation mechanism 13 (see FIG. 26).

The base 2 is one embodiment of the base according to the present invention, and is a member group forming the main structure of the walking type rice transplanter 1. As shown in FIG. 5, the base 2 includes an engine stage 21, a bumper 22, a mission case 23, a center frame 24, a left axle case 25L, a right axle case 25R, and a left side. Room frame 26L, right side frame 26R, center planting case 27C, left planting case 27L, right planting case 27R, left rear frame 28L, right rear frame 28R are provided. . In addition, the base | substrate which concerns on this invention is not limited to the same structure as the base | substrate 2 of this embodiment.

The engine stand 21 is a member that forms the front part of the base 2. The engine stand 21 of this embodiment is manufactured by bending a metal plate suitably.

The bumper 22 is a member for protecting the front part of the base 2. The bumper 22 is fixed to the front end of the engine stand 21.

The mission case 23 is a member for accommodating a part of the member group constituting the transmission mechanism 7 described later. The mission case 23 of this embodiment is provided with the left member 23L and right member 23R which are casting goods, and the bolt which fixes these. The front end of the mission case 23 is fixed to the rear end of the engine stand 21 by bolts.

The center frame 24 is a member that forms the center of the base 2. The center frame 24 of this embodiment is a metal prism-shaped member extended in the front-back direction. The front end of the center frame 24 is fixed to the rear end of the mission case 23 by bolts.

The left axle case 25L is a member that supports the left wheel 4L so as to be able to swing in the up and down direction with respect to the base 2, and further supports the left wheel 4L. One end (front end) of the left axle case 25L is rotatably supported by the left side (left member 23L) of the mission case 23, and the other end of the left axle case 25L is generally left axle case It is arrange | positioned behind the one end of 25L. On the other end (rear end) of the left axle case 25L, the left wheel 4L is held.

The right axle case 25R is a member that supports the right wheel 4R so as to be able to swing in the up and down direction with respect to the base 2, and also holds the right wheel 4R. One end (front end) of the right axle case 25R is rotatably supported by the right side (right member 23R) of the mission case 23, and the other end of the right axle case 25R is generally the right axle case ( It is arranged at the rear of one end of 25R). The right wheel 4R is held by the other end (rear end) of the right axle case 25R.

The left axle case 25L and the right axle case 25R of the present embodiment are members formed into a long and thin case shape (a shape having a space formed therein) by pressing a metal plate.

The left frame 26L is a member that forms the left side of the base 2, and the right frame 26R is a member that forms the right side of the base 2. The left side frame 26L and the right side frame 26R of this embodiment connect the edge part of two metal cylinders with the joint member whose external shape is substantially "L" shape. One end of the left frame 26L (the end of the two cylinders connected by the joint member, which is not fixed to the joint member in one cylinder) is the left side of the mission case 23 (the left member 23L). ), And the other end of the left frame 26L (the end of the two cylinders connected by the joint member, the end of which is not fixed to the joint member in the other cylinder) is one end of the left frame 26L. It is located at a position slightly behind the left side of the part. Similarly, one end of the right side frame 26R is fixed to the right side (right member 23R) of the mission case 23, and the other end of the right side frame 26R is rear right of one end of the right side frame 26R. It is located in a slightly downward position while being a room.

The center planting case 27C holds the center left planting arm portion 51L and the center right planting arm portion 51R rotatably in the planting apparatus 5 described later, and transmits a driving force to them. The central planting case 27C of the present embodiment is a cast product, and the front end of the central planting case 27C is fixed to the rear end of the center frame 24.

27 L of left planting cases hold | maintain rotatably the left planting arm part 52L among the planting apparatus 5 mentioned later, and transmit a driving force to this. The left planting case 27L of the present embodiment is a cast product, and the front end of the left planting case 27L is fixed to the other end (rear end) of the left frame 26L.

27 R of right planting cases hold | maintains the right planting arm part 52R rotatably among the planting apparatuses 5 mentioned later, and transmits a driving force to this. The right planting case 27R of this embodiment is a cast product, and the front end part of the right planting case 27R is fixed to the other end (rear end part) of the right side frame 26R.

The left rear frame 28L is a member forming the left rear portion of the base 2. The left rear frame 28L of this embodiment is a metal prismatic member extending in the front-rear direction, and the front end of the left rear frame 28L is fixed to the rear end of the left planting case 27L.

The right rear frame 28R is a member that forms the right rear side of the base 2. The right rear frame 28R of this embodiment is a metal prismatic member extending in the front-back direction, and the front end of the right rear frame 28R is fixed to the rear end of the right planting case 27R.

The engine 3 shown in FIG. 6 is one Embodiment of the engine which concerns on this invention, and is a drive source of the walking type rice transplanter 1. The engine 3 of this embodiment is a gasoline engine, and is fixed to the rear part of the upper surface of the engine stand 21.

The left wheel 4L and the right wheel 4R shown in FIGS. 1 to 4 are driving wheels of the walking type rice transplanter 1. The left wheel 4L is hung on the other end (rear end) of the left axle case 25L. The right wheel 4R is held by the other end (rear end) of the right axle case 25R.

The planting apparatus 5 shown in FIG. 6 is a device which simulates planting. The planting apparatus 5 of this embodiment is a crank planting apparatus, The center left planting arm part 51L, the center right planting arm part 51R, the left planting arm part 52L, and the right planting arm part 52R And a driving arm, an interlocking arm, and the like, not shown. The left planting arm part 52L, the center left planting arm part 51L, the center right planting arm part 51R, and the right planting arm part 52R are arranged at intervals in order from the left, and are walk-type rice transplanters ( It is arranged in the lower back of the body 2 of 1). The center left planting arm part 51L, the center right planting arm part 51R, the left planting arm part 52L, and the right planting arm part 52R are described in the mother supply apparatus 6 (the parent mounting table 61). The seedlings are planted in the rice paddy by carrying out a series of operations in which a predetermined amount of seedlings are removed from the mother mat mounted on the front end) and the seeded seedlings are transplanted into the rice paddies.

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As shown in FIG. 6 and FIG. 7, the main shaft 73 is a rotating shaft for inputting the driving force generated in the engine 3 to the mission case 23. The main shaft 73 is rotatably supported by the mission case 23. One end part (left end part) of the main shaft 73 protrudes to the left side of the mission case 23, and the other part is accommodated in the mission case 23. As shown in FIG.

All of the gears 73a, 73b, 73c, 73d, 73e, 73f are incapable of rotation relative to the main shaft 73 and are immovably fixed in the axial direction (length direction) of the main shaft 73 and accommodated in the mission case 23. do. The gears 73a and 73b are spur gears related to the change of the traveling speed of the walking type rice transplanter 1, and in this embodiment, the dimension of the gear 73a is the gear 73b. More than the dimensions of). The gears 73c, 73d, 73e, 73f are cogwheels related to the change of the interval (weekly) in the simulation traveling direction implanted by the walking type rice transplanter 1, and the size of the gear 73c < The relationship between the size of the gear 73d < the size of the gear 73e < the size of the gear 73f &quot;

The shift shaft 74 is a rotation shaft related to the change of the traveling speed of the walking type rice transplanter 1. The shift shaft 74 is rotatably supported by the mission case 23 and is accommodated in the mission case 23.

The gear 74a is a spur wheel fixed to the shift shaft 74 while being unable to rotate in the axial direction of the shift shaft 74. In this embodiment, the gear 74a is integrally formed in the right half part of the transmission shaft 74, and the spline groove is formed in the left half part of the transmission shaft 74. As shown in FIG.

The transmission gear 75 is a gearwheel related to the change of the traveling speed of the walking type rice transplanter 1. The transmission gear 75 has a shape in which two cog wheels having different dimensions are stacked coaxially. The part which comprises the flat gear of the smaller dimension among the transmission gears 75 is the small gear part 75a, and the part which comprises the flat gear of the larger dimension is the standby gear part 75b. A through hole is formed in the transmission gear 75, and a spline groove is formed in the through hole. The shift gear 75 penetrates to the left half of the shift shaft 74. As the spline groove formed in the through hole of the shift gear 75 meshes with the spline groove formed in the left half of the shift shaft 74, the shift gear 75 is incapable of relative rotation with respect to the shift shaft 74 and the shift shaft 74. ) Can be moved in the axial direction (length direction).

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Hereinafter, the center float 10C, the left side float 10L, and the right side float 10R will be described with reference to FIGS. 1 to 4, 8, and 9.

The center float 10C, the left side float 10L, and the right side float 10R give buoyancy to the walkthrough rice transplanter 1 (preferably, preventing the walked rice transplanter 1 from being buried in the paddy field). will be. Center float 10C, left side float 10L, and right side float 10R are generally plate-like members extending in the front-rear direction. Spaces are formed inside the center float 10C, the left side float 10L, and the right side float 10R, respectively, and air is enclosed in these spaces.

As shown in FIGS. 1-3, center float 10C is arrange | positioned in the position which becomes a downward while being the left-right center of the base | substrate 2. As shown to FIG.

As shown in FIG. 1, FIG. 3, and FIG. 8, the rear end part of the center float 10C is rotatably connected by the bracket 101C and the pin 102C to the position which becomes the left and right center part of the base | substrate 2, and becomes the lower back part. do. More specifically, the bracket 101C is fixed to the upper surface of the rear end of the center float 10C. The pin 102C is the left and right centers of the base 2 and the bottom rear portion (strictly, the center portion of the lower frame 171a of the handle frame 171 fixed to the base 2 (see Fig. 18)) and It penetrates through bracket 101C.

The front end portion of the center float 10C is movable up and down in a position that is the left and right center portions of the base 2 and becomes the front lower portion by the bracket 103C, the float arm 104C, the pin 107C, and the pin 108C. (Swivelable) is connected. More specifically, the bracket 103C is fixed to the upper surface of the front end of the center float 10C. A through hole 105C is formed in one end (lower end) of the float arm 104C, and a through hole 106C is formed in a portion from the other end (upper end) to the middle of the float arm 104C. As the pin 107C penetrates the through hole formed in the through hole 105C and the bracket 103C, the front end of the center float 10C and the one end (lower end) of the float arm 104C are rotatably connected. As the pin 108C penetrates the through hole 106C and the through hole formed under the bumper 22, the float arm 104C is slidable (movable in the longitudinal direction of the float arm 104C) while the bumper 22 Is connected rotatably.

Thus, the center float 10C can be rotated centering on the fin 102C with respect to the base 2 of the walking type rice transplanter 1. Therefore, the front end of the center float 10C is movable (swingable) with respect to the base 2 of the walking type rice transplanter 1 in the up-down direction.

As shown to FIG. 1 thru | or 4, the left side float 10L is arrange | positioned below the base | substrate 2, and becomes a position back to the left.

As shown in FIG. 1, FIG. 3, and FIG. 9, the rear end of the left side float 10L is rotatably connected by the bracket 101L and the pin 102L to the position which becomes lower left rear part of the base | substrate 2 . More specifically, the bracket 101L is fixed to the upper surface of the rear end of the left side float 10L. The pin 102L is a portion that becomes the lower left rear portion of the base 2 (strictly, the left end of the lower frame 171a of the handle frame 171 fixed to the base 2 (see Fig. 18)) and the bracket It penetrates 101L.

The front end of the left side float 10L is vertically positioned at the front and rear centers of the base 2 while being lower left by the bracket 103L, the float arm 104L, the pin 107L and the left side float arm 108L. Is connected movably (stable). More specifically, the bracket 103L is fixed to the upper surface of the front end of the left side float 10L. One end of the left side float arm 108L is fixed to the bent portion of the left frame 26L. A through hole 105L is formed in one end (lower end) of the float arm 104L, and a through hole 106L is formed in a portion from the other end (upper end) to the middle of the float arm 104L. As the pin 107L penetrates the through hole formed in the through hole 105L and the bracket 103L, the front end of the left side float 10L and one end (lower end) of the float arm 104L are rotatably connected. . The other end of the left side float arm 108L penetrates through the through-hole 106C, whereby the float arm 104L is slidable (movable in the longitudinal direction of the float arm 104L) and with respect to the left frame 26L. It is connected rotatably.

In this way, the left side float 10L is rotatable around the pin 102L with respect to the base 2 of the walking type rice transplanter 1. Therefore, the front end of the left side float 10L is movable (oscillating) up and down with respect to the base 2 of the walking type rice transplanter 1.

As shown to FIG. 1 thru | or 4, the right side float 10R is arrange | positioned below the base | substrate 2 and becomes a right back side.

As shown in FIG. 1, FIG. 3, and FIG. 9, the rear end of the right side float 10R is rotatably connected by the bracket 101R and the pin 102R to the position which becomes the lower right back side of the base | substrate 2 .

The front end of the right side float 10R is vertically positioned at the front and rear center portions of the base body 2 by the bracket 103R, the float arm 104R, the pin 107R, and the right side float arm 108R, and the lower right portion thereof. Is connected movably (stable). A through hole 105R is formed in one end (lower end) of the float arm 104R, and a through hole 106R is formed in a portion from the other end (upper end) to the middle of the float arm 104R.

In this way, the right side float 10R is rotatable around the fin 102R with respect to the base 2 of the walking type rice transplanter 1. Therefore, the front end of the right side float 10R is movable (oscillating) up and down with respect to the base 2 of the walking type rice transplanter 1.

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Hereinafter, the structure of the stand 15 is demonstrated, referring FIG. 15, FIG. 20, and FIG. The stand 15 includes a stand bar 151, an operation arm unit 152, and a stand spring 153. The stand bar 151 is shape | molded in the crank shape by bending the metal round rod suitably. The stand bar 151 has a stand shaft portion 151a, a connecting portion 151b, a contact portion 151c, a connecting portion 151d and a stand shaft portion 151e.

The stand shaft part 151a * 151e is one Embodiment of the stand shaft part which concerns on this invention, and is a part which comprises the left end part and the right end part of the stand bar 151, respectively. Since the axis line of the stand shaft part 151a of this embodiment, and the axis line of the stand shaft part 151e are mutually linear, what made the stand shaft part 151a and the stand shaft part 151e coincide substantially one rotation shaft.

The connection part 151b is a part which connects the right end part of the stand shaft part 151a and the left end part of the contact part 151c. The connection part 151d is a part which connects the left end part of the stand shaft part 151e and the right end part of the contact part 151c. The axial direction (length direction) of the connection part 151b is perpendicular to the axial direction (length direction) of the stand shaft part 151a. The axis line direction (length direction) of the connection part 151d is perpendicular to the axis line direction (length direction) of the stand shaft part 151e. The axial direction (length direction) of the connection part 151b is parallel with respect to the axial direction (length direction) of the connection part 151d.

The contact part 151c is one Embodiment of the contact part which concerns on this invention. The contact part 151c of this embodiment is connected to the stand shaft part 151a * 151e via the connection part 151b and the connection part 151d (actually, the contact part 151c is the connection part 151b and the connection part 151d). Fixed to the stand shaft portions 151a and 151e). The axial direction (length direction) of the contact part 151c is parallel with respect to the axial direction (length direction) of the stand shaft part 151a * 151e.

As shown in FIG. 15, the stand bar 151 is rotatably supported by the base 2. More specifically, the stand shaft portion 151a is rotatably penetrated through the bearing hole 21c formed at a position which is the front and rear center portions of the plate forming the left side of the engine stand 21 and becomes a lower portion, and the stand shaft portion 151e is rotatable. By penetrating rotatably through the bearing hole 21d formed at the position which becomes the front and rear center part of the board | plate material which forms the right side of the engine stand 21, and becomes a lower part, the stand bar 151 (proceedingly, the stand shaft part 151a and the stand shaft part ( 151e) is pivotally rotatable in the position which becomes the lower part while being the front-back center part of the engine stand 21, and is rotated.

In the present invention, since the stand shaft portion and the contact portion need to be rotated integrally when an external force (moment) is applied to the stand shaft portion, the stand shaft portions 151a and 151e and the contact portion 151c are integrally formed as in the present embodiment. Also included in the configuration is that the contact portion is fixed to the stand shaft portion.

The operation arm unit 152 has a cylinder part 152a, the rotation angle control part 152b, and the operation arm part 152c. The cylinder part 152a is a substantially cylindrical member made of metal. The rotation angle control part 152b is a metal long thin plate-shaped member, and the intermediate part of the rotation angle control part 152b is fixed by welding to the one end (right end part) of the cylinder part 152a. The longitudinal direction of the rotation angle control part 152b fixed to the cylinder part 152a is perpendicular to the axial direction of the cylinder part 152a. The operation arm part 152c is one Embodiment of the operation arm part which concerns on this invention. The operation arm part 152c of this embodiment is a long, thin plate-shaped member made of metal, and one end of the operation arm part 152c is fixed by welding to the other end (left end part) of the cylinder part 152a. The through hole 152d is formed in the other end of the operation arm part 152c.

The operation arm unit 152 is fixed to the left end of the stand bar 151 so that relative rotation is impossible. More specifically, the operation arm is a part of the stand shaft portion 151a of the stand bar 151 which is pivotally rotatable on the engine stand 21, which protrudes to the left side of the plate forming the left surface of the engine stand 21. The tubular portion 152a of the unit 152 penetrates through, and the tubular portion 152a is fixed to the stand bar 151 in a relative impossible rotation by a split pin or the like. As a result, the operation arm portion 152c is fixed to the stand shaft portions 151a and 151e in a relative non-rotational manner.

The stand spring 153 is a member which biases in the direction which rotates counterclockwise when the stand bar 151 is viewed from the left side centering on the stand shaft part 151a * 151e. The stand spring 153 of this embodiment is a metal coil spring, and penetrates through the stand shaft part 151e of the stand bar 151. As shown in FIG. One end of the stand spring 153 is caught by the connecting portion 151d of the stand bar 151, and the other end of the stand spring 153 is caught by the engine stand 21.

When no external force other than the biasing force of the stand spring 153 is applied to the stand bar 151, the stand bar 151 is centered on the stand shaft portions 151a and 151e by the biasing force of the stand spring 153. Rotate counterclockwise from the left side. Operation arm unit 152 when the stand bar 151 is rotated counterclockwise as seen from the left side to the position where the contact part 151c of the stand bar 151 is arrange | positioned behind the stand shaft parts 151a and 151e. When one end of the rotation angle regulating portion 152b of the contact with the upper surface of the blade portion 21e formed in the lower end of the plate forming the left surface of the engine stand 21, the counterclockwise when viewed from the left side of the stand bar 151 Rotation of direction is regulated.

The posture of the stand 15 when the stand bar 151 is disposed at a position where the contact portion 151c of the stand bar 151 is disposed behind the stand shaft portions 151a and 151e is defined as a retraction ( I) It corresponds to one form of implementation of a posture.

When the posture of the stand 15 is maintained in the 'retraction posture', the contact portion 151c of the stand bar 151 does not protrude downward from the lower end of the engine stand 21 (the lower end of the engine stand 21). Since the contact portion 151c does not come into contact with the front end portion of the center float 10C (because it is disposed at a higher position), the contact portion 151c does not interfere. Therefore, the stand 15 at the time of being kept in the "retraction posture" does not restrict (permit) that the front end of the center float 10C moves upwards.

When external force is applied to the stand bar 151, the stand bar 151 is resisted to the biasing force of the stand spring 153, and the stand bar 151 is viewed from the left side with respect to the stand shaft portions 151a and 151e. It is possible to rotate clockwise. When the stand bar 151 is rotated clockwise when viewed from the left side, the stand portion 151c of the stand bar 151 is disposed below the stand shaft portions 151a and 151e. When the other end of the rotation angle regulating portion 152b comes in contact with the upper surface of the blade portion 21e, the rotation in the clockwise direction is restricted when viewed from the left side of the stand bar 151. The attitude | position of the stand 15 when the stand bar 151 is arrange | positioned in the position where the contact part 151c of the stand bar 151 is arrange | positioned under the stand shaft parts 151a and 151e is the regulation posture which concerns on this invention. Corresponds to one embodiment of implementation.

When the posture of the stand 15 is maintained in the 'regulated posture', the contact portion 151c of the stand bar 151 projects downward from the lower end of the engine stand 21 (than the lower end of the engine stand 21). Since the contact portion 151c contacts (interferes with) the upper surface of the front end portion of the center float 10C, since it is disposed at a downward position. Therefore, the stand 15 at the time of being maintained in a "regulation posture" restricts the front end of the center float 10C from moving upward. On the other hand, when the front end portion of the center float 10C is in contact with the contact portion 151c of the stand 15 when being held in the 'regulated posture', the rotation angle of the pitching sensor 120 of the pitching control mechanism 11 The relative positional relationship of each member is adjusted so that is within a predetermined predetermined range (so that the up-down positions of the left wheel 4L and the right wheel 4R with respect to the base 2 are kept constant).

In this way, the stand 15 can be rotated around the stand shaft portions 151a and 151e, thereby changing the posture between the "regulated posture" and the "retreat posture."

Hereinafter, the structure of the main clutch 16 will be described with reference to FIGS. 6, 16, and 17.

The main clutch 16 transmits the driving force from the engine 3 to the "transmission of the walking type rice transplanter 1" and stops it. The main clutch 16 shown in FIG. 16 and FIG. 17 is what is called a belt tension type | mold clutch, and is provided with the main clutch arm 161, the main clutch roller 162, the engagement arm 163, and the main clutch spring 164. FIG. .

The main clutch arm 161 is provided with the arm member 161a, the support shaft member 161b, and the cylinder member 161c. The arm member 161a is a long, thin plate-shaped member made of metal. A through hole 161d is formed in the middle portion of the arm member 161a. The support shaft member 161b is a metal substantially cylindrical member. The support shaft member 161b is fixed to one end of the arm member 161a by welding. The cylinder member 161c is a substantially cylindrical member made of metal. The cylinder member 161c is fixed to the other end of the arm member 161a by welding. The cylinder member 161c penetrates through the rotational shaft 21b fixed to the board | plate material which forms the left surface of the engine stand 21 so that rotation is possible. As the cylinder member 161c penetrates to the rotation shaft 21b so that rotation is possible, the main clutch arm 161 is supported by the base 2 so that rotation is possible.

The main clutch roller 162 is a substantially cylindrical member, and a ring-shaped groove extending in the circumferential direction is formed on the outer circumferential surface of the main clutch roller 162. The main clutch roller 162 penetrates through the support shaft member 161b of the main clutch arm 161 so as to be relatively rotatable. The main clutch roller 162 is rotatably supported by the support shaft member 161b so that the main clutch roller 162 is rotatably supported at one end of the main clutch arm 161.

The engagement arm 163 is generally a prismatic member, and one end of the engagement arm 163 is fixed to the cylinder member 161c by welding and provided to the main clutch 16. The engagement arm 163 is formed with a through groove 163a and an engagement groove 163b. The through groove 163a is a groove which penetrates from the front surface to the rear surface of the engagement arm 163 and is open to the lower surface of the engagement arm 163, and more specifically, the inner wire 181b (more specifically, the inner wire 181b). )) Penetrates the through grooves 163a. The engagement groove 163b is a groove which penetrates from the left side of the engagement arm 163 to the right side of the engagement arm 163 via the through groove 163a and is open to the front surface of the engagement arm 163. The rear end of the engaging groove 163b is shaped like a bag, and is larger in the up-down direction than the front end of the engaging groove 163b (the part opened in the front surface of the engaging arm 163). The engagement arm 163 is engaged with the engagement member 182 described later by receiving the engagement member 182 described later in the engagement groove 163b (see FIGS. 19, 20, and 21).

The main clutch spring 164 is a metal coil spring. One end of the main clutch spring 164 is caught by a through hole 161d formed in the arm member 161a of the main clutch arm 161. The other end of the main clutch spring 164 is caught by a locking bar 29a extending from the pulley cover 29 fixed to the left side of the mission case 23 to protect the pulley 72b. The main clutch spring 164 biases the main clutch arm 161 to rotate clockwise when viewed from the left side about the rotation shaft 21b by the elastic force (bias force) to be retracted. As a result, the main clutch roller 162 supported at one end of the main clutch arm 161 is in contact with the outer circumferential surface of the belt 72c. When the main clutch roller 162 contacts the outer circumferential surface of the belt 72c, the tension of the belt 72c is increased, and the driving force can be transmitted from the pulley 72a to the pulley 72a via the belt 72c. .

The main clutch arm 161 and the engaging arm 163 are separate members, both of which are fixed by welding, but are not limited thereto, and the main arm portion and the engaging portion are integrally formed when an external force (moment) is applied to the engaging portion. You just need to have a rotating structure. In other words, the 'engaging portion is fixed to the main arm portion' includes 'the main arm portion and the engaging portion is molded integrally'.

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Hereinafter, the detail of the main clutch stand operating mechanism 180 is demonstrated, referring FIG. 2, FIG. 18, FIG. 19, FIG. 20, and FIG.

BACKGROUND ART Conventionally, a walking type rice transplanter having a main clutch for switching whether to transmit the driving force of an engine to a mission case is known. As an example of such a main clutch, a belt tension type clutch is known. For example, it is as described in Unexamined-Japanese-Patent No. 1-90315 and Unexamined-Japanese-Patent No. 64-9513.

An example of a general belt tension type clutch is an arm supported rotatably on a body of a walking type rice transplanter, a roller supported rotatably on one end of the arm, and one end fixed to the arm, and the other end walking on a walking type rice transplanter. A spring fixed to the body of the engine and biased in a direction in which the roller is pressed against the belt for transmitting the driving force of the engine to the mission case, and a wire having one end connected to the middle of the arm or the other end of the arm (manipulating the main clutch) And a main clutch lever (a lever for operating the main clutch) provided at the handle of the rear side of the walking type rice transplanter while the other end of the wire is connected. In the case of the belt tension type clutch, when the operator is not in contact with the main clutch lever, the roller is pressed against the belt by the biasing force of the spring, and the tension of the belt is increased so that the main clutch is 'ON' (the driving force of the engine Is delivered to the case). In addition, when the operator grasps the main clutch lever, the roller is spaced apart from the belt in response to the biasing force of the spring, and the tension of the belt is reduced so that the main clutch is 'OFF' (a state in which the driving force of the engine is not transmitted to the mission case). Becomes

Moreover, the pitching control mechanism which is a mechanism which stabilizes the simulated planting depth by a walking type rice transplanter is also known conventionally by controlling the inclination of the body of a walking type rice transplanter, and also the height of the gas with respect to a rice field. For example, Japanese Utility Model Publication No. Hei 1-90315, Japanese Utility Model Publication No. 64-9513, Japanese Utility Model Publication No. 64-24908, Japanese Patent Publication No. 59-88016, and Japanese Patent Publication It is as having description of Unexamined-Japanese-Patent No. 63-141510 and Unexamined-Japanese-Patent No. 6-78611.

As an example of a general pitching control mechanism, a single-acting hydraulic cylinder (pitching cylinder) for rotating an arm whose one end is rotatably supported by the body while the other end is rotatably supported by a traveling wheel, While extending the hydraulic cylinder by supplying the hydraulic oil to the hydraulic cylinder, while maintaining the overall length of the hydraulic cylinder by filling the hydraulic oil into the hydraulic cylinder, and contracting the hydraulic cylinder by recovering the hydraulic oil from the hydraulic cylinder. A hydraulic pump that can be switched to any one, a float rotatably supported on the lower part of the body of the walking type rice transplanter, a float sensor detecting the rotation angle of the float with respect to the gas of the walking type rice transplanter, and a float detected by the float sensor. Establish a linkage mechanism to link the rotation angle to the state of the hydraulic pump To compare.

When the pre-loading work is carried out on the walking type rice transplanter, the weight of the walking type rice transplanter is greatly increased, so the posture of the walking type rice transplanter may change. Therefore, the posture of a walking type rice transplanter may become unstable (when a walking type rice transplanter shows unexpected behavior to an operator) when the work | work is put on a walking type rice transplanter with the pitching control mechanism operating. As a solution to such a problem, a walking type rice transplanter is also known that includes a 'mechanism for manually switching the state in which the pitching control mechanism operates and the state in which the pitching control mechanism does not operate'. For example, Japanese Utility Model Publication No. Hei 1-90315, Japanese Utility Model Publication No. 64-9513, Japanese Utility Model Publication No. 64-24908, Japanese Patent Publication No. 59-88016, and Japanese Patent Publication It is as having description of Unexamined-Japanese-Patent No. 63-141510 and Unexamined-Japanese-Patent No. 6-78611. As a specific example of the "mechanism for manually switching the state in which the pitching control mechanism operates and the state in which the pitching control mechanism does not operate", a linkage mechanism for linking the rotation angle of the float detected by the float sensor with the state of the hydraulic pump is provided. Switching the state where the float sensor can be rotated and the state that cannot be rotated by operating a member that detachably engages the arm to be formed (see Japanese Utility Model Laid-Open No. 64-9513), in the middle of the rotating shaft of the float sensor It is known to provide a clutch to switch the clutch on and off (see Japanese Patent Laid-Open No. 63-141510), to change the posture of a stand which regulates the movement (rotation) of the float by contacting the float, and the like. .

In the case of the walking type rice transplanter described in Japanese Utility Model Laid-Open No. 64-9513, Japanese Utility Model Laid-Open No. 64-24908 and Japanese Patent Laid-Open No. 63-141510, the control system of the main clutch (wire and clutch lever And the mechanism for manually switching the state in which the pitching control mechanism is in operation and the state in which the pitching control mechanism is not in operation, so to achieve these operating systems, at least two wires and two clutch levers are used. It costs.

When the pitching control mechanism is kept inoperable and the spare brim is loaded on the walking type rice transplanter, since the walking type rice transplanter does not travel and does not work the seedlings, the operation system of the main clutch and the 'pitching control mechanism' are operated. And a walking type rice transplanter that maintains the pitching control mechanism in a non-operating state when the main clutch is kept in an 'OFF' state by linking the control system of the 'mechanism for manually switching the non-operating state of the pitching control mechanism'. . For example, it is as described in Unexamined-Japanese-Patent No. 1-90315, Unexamined-Japanese-Patent No. 59-88016, and Unexamined-Japanese-Patent No. 6-78611.

However, in the case of the walking type rice transplanter described in Japanese Utility Model Laid-Open Publication No. Hei 1-90315, Japanese Patent Laid-Open Publication No. 59-88016 and Japanese Patent Laid-Open Publication No. Hei 6-78611, the wire forming the operation system of the main clutch and It requires two wires of wires that constitute the operating system of 'the mechanism for manually switching the state in which the pitching control mechanism operates and the state in which the pitching control mechanism does not operate'. In the case of the walking type rice transplanter of patent document 1, the specific structure of "the mechanism which switches a state in which a pitching control mechanism works and a state in which a pitching control mechanism does not operate" is not disclosed. In addition, the walk type rice transplanter described in Japanese Patent Laid-Open No. 59-88016 and Japanese Patent Laid-Open No. Hei 6-78611 requires a complicated linking mechanism for linking two operating systems. In this way, when the operation system of the main clutch and the operation system of 'the mechanism for manually switching the state in which the pitching control mechanism operates and the state in which the pitching control mechanism does not operate' are linked, these operating systems become complicated and the number of parts increases. .

In view of the above problems, there is provided a walking type rice transplanter which can be operated in conjunction with a main clutch and a stand for regulating the movement of the float in a simple structure having a smaller number of parts than in the related art.

That is, the stand which can change a posture between the regulation posture which regulates the movement of the front end of a float upward, and the retraction posture which does not regulate, and the main clutch which transmits the driving force from an engine to a transmission, and stops are provided. A walking type rice transplanter having an operating mechanism for operating an on-off member, wherein the operating mechanism is a wire member having one end fixed to a stand, and an engagement member fixed to an intermediate portion of the wire member and engaged with the on-off member of the main clutch. And a spring member provided at a position that is at the one end side of the wire member rather than the engagement member while being an intermediate portion of the wire member, and an operation member connected to the other end of the wire member, and the other end of the wire member by operating the operation member. When the end is pulled, the stand rotates from the retracted position by rotating the stand. A first position with the changes, the on-off member matmulrimyeonseo main clutch is rotated with the engaging member thereby will be the transmission of the driving force to the transmission stops.

In addition, the stand is fixed to the stand shaft portion rotatably supported by the body, the contact portion fixed to the stand shaft portion, the contact portion in contact with the upper surface of the float when in a regulated position, one end is fixed to the stand shaft portion, one end portion of the wire member to the other end A main arm portion having a fixed operation arm portion, the main clutch portion rotatably supported by the body, a roller portion rotatably supported at one end of the main arm portion, and an engaging portion fixed to the main arm portion and engaged with the engagement member. And a bias portion for biasing the main arm portion so that the roller portion rotates in a direction in contact with the belt that transmits the driving force from the engine to the transmission, and the engaging portion of the main clutch corresponds to the on-off member.

Further, by forming the middle portion of the steel wire in a spiral shape, a portion formed in a spiral shape among the steel wires is used as a spring member, and a part not formed in a spiral shape in the steel wire is a wire member.

As a result, the main clutch and the stand regulating the movement of the float can be operated in a simple structure having a smaller number of parts than in the related art.

That is, the main clutch stand operating mechanism 180 is used to operate the stand 15 and the main clutch 16, and more precisely, for the operator to operate the stand 15 and the main clutch 16. As shown in FIG. 18, the main clutch stand operating mechanism 180 includes a wire member 181, an engagement member 182, a spring member 187, and an operation member 190.

The wire member 181 includes an outer wire 181a and an inner wire 181b.

The outer wire 181a is a tubular member having flexibility (elastic deformation). One end (front end) of the outer wire 181a is fixed to the base 2 and more specifically to a bracket 24a (see FIG. 5) provided on the left side of the center frame 24. The other end (rear end) of the outer wire 181a is fixed to the lever support member 171f provided at the handle frame 171, more specifically, at the position which is the middle end of the upper frame 171c and becomes the left end side.

The inner wire 181b is a string-shaped member having flexibility (which can be elastically deformed). The inner wire 181b of this embodiment is braided with several thin steel wires, and penetrates through the outer wire 181a. The inner wire 181b penetrated through the outer wire 181a is slidable with respect to the outer wire 181a (movable in the longitudinal direction of the outer wire 181a). The total length of the inner wire 181b is larger than the total length of the outer wire 181a. One end (front end) of the inner wire 181b is fixed to one end (rear end) of the coil spring part 187a of the spring member 187 described later. The other end (rear end) of the inner wire 181b is fixed to the lever arm 193 described later.

The engagement member 182 is one Embodiment of the engagement member which concerns on this invention. As shown in FIG. 19, the engagement member 182 of this embodiment is equipped with the bolt 183 and the nut 186. As shown in FIG.

The bolt 183 has a head 184 and a body 185. Head 184 is a hexagonal columnar portion with a pair of cross sections and six sides. The body portion 185 is a cylindrical portion protruding from one end surface of the head 184. Male threads are formed on the outer circumferential surface of the body portion 185. At the proximal end of the fuselage 185 (the end connected to the head 184), a through hole 185a penetrating the outer circumferential surface of the fuselage 185 in a direction perpendicular to the axial direction of the fuselage 185 is provided. Is formed.

The nut 186 is a hexagonal columnar member having a pair of cross sections and six sides. The nut 186 is formed with a through hole 186a passing through a pair of cross sections. A female screw is formed on the inner circumferential surface of the through hole 186a.

The engagement member 182 is fixed to the middle portion of the wire member 181. More specifically, as shown in FIG. 18 and FIG. 19B, the inner wire 181b of the wire member 181 passes through the through hole 185a formed in the body portion 185 of the bolt 183. By screwing the nut 186 to the bolt 183, the engagement member 182 is fixed at a position which is the middle of the inner wire 181b and becomes the front end.

The engagement member 182 meshes with the engagement arm 163 of the main clutch 16. More specifically, as shown in FIG. 20 and FIG. 21, the engagement member 182 fixed at a position which is the middle portion of the inner wire 181b and the front end side thereof is an engagement groove 163b formed in the engagement arm 163. Is accommodated). When the engagement member 182 is accommodated in the engagement groove 163b, the inner wire 181b penetrates the through groove 163a formed in the engagement arm 163 in the front-rear direction.

Although the engagement member 182 of this embodiment is equipped with the bolt 183 and the nut 186, the engagement member which concerns on this invention is not limited to this. That is, the engagement member which concerns on this invention may have another shape as long as it can engage the intermediate part of a wire member with the engagement part of a main clutch.

As shown in FIG. 18, the spring member 187 is a metal coil spring which has the coil spring part 187a and the hook part 187b. The coil spring portion 187a is a portion formed in a spiral wound shape of the spring member 187. One end (rear end) of the coil spring portion 187a is fixed to one end (front end) of the inner wire 181b. The hook portion 187b is a portion connected to the other end of the coil spring portion 187a. One end (rear end) of the hook part 187b is connected to one end of the coil spring part 187a, and the other end (front end) of the hook part 187b is bent in a hook shape. As shown in FIG. 15, FIG. 20, and FIG. 21, the other end part of the hook part 187b is fixed to the through-hole 152d formed in the operation arm part 152c of the operation arm unit 152 of the stand 15. As shown to FIG. (It takes).

In this embodiment, what combined the outer wire 181a of the wire member 181, the inner wire 181b, and the hook part 187b of the spring member 187 to one Embodiment of the wire member which concerns on this invention. The coil spring portion 187a of the spring member 187 corresponds to one embodiment of the spring member according to the present invention. That is, as shown in FIGS. 20 and 21, the hook portion 187b of the spring member 187 is fixed to the stand 15. Moreover, the coil spring part 187a of the spring member 187 is the wire member (outer wire 181a and inner wire 181b of the wire member 181, and the hook part of the spring member 187 of this embodiment). (187b) is added, and is provided at a position where the one end (front end) side of the wire member of the present embodiment is closer than the engagement member 182.

In addition, in this embodiment, although the hook part 187b of the spring member 187 performed the function as a part of one Embodiment of the wire member which concerns on this invention, this invention is not limited to this. For example, by forming the hook portion 187b in a short shape in the front-rear direction, the front end portion of the coil spring portion 187a is substantially fixed to the stand 15, and the inner wire (at the rear end portion of the coil spring portion 187a) is formed. One end of the 181b may be fixed, and the engaging member 182 may be fixed to the middle portion of the inner wire 181b. In other words, 'one end of the wire member is fixed to the stand, and the spring member is provided at a position where the spring member is at the end of the wire member rather than the engagement member while being a middle part of the wire member'. And one end of the wire member is fixed to the other end of the spring member, and the engagement member is fixed to the middle part of the wire member or one end of the wire member.

The operation member 190 is one embodiment of the operation member according to the present invention, and is a portion that an operator makes contact with by hand when operating the stand 15 and the main clutch 16. As shown in FIG. 18, the operation member 190 of this embodiment uses the main clutch lever 191, the main clutch pin 192, the lever arm 193, the spacer 194a, 194b, and the arm pin 195. Equipped.

The main clutch lever 191 is a part of the main structure of the operation member 190. The main clutch lever 191 is equipped with the rotating cylinder 191a, the lever main body 191b, the grip 191c, the bracket 191d, and the roller 191e.

The rotating cylinder 191a is a metallic cylindrical member. The through hole 191a is formed with a through hole penetrating a pair of cross sections.

The lever body 191b is a metal rod-shaped member. One end (base end) of the lever main body 191b is fixed to one end (left end) of the outer circumferential surface of the rotation cylinder 191a by welding.

The grip 191c is a member constituting a part held by a worker when operating the stand 15 and the main clutch 16. The grip 191c of this embodiment is a cylindrical member in which one end of the resin material was closed. The other end (tip) of the lever body 191b is inserted into the opening of the grip 191c, so that the grip 191c is fixed to the lever body 191b.

The bracket 191d is a member that is bent at right angles at the boundary between one end and the middle of the long and thin metal plate and the boundary line between the middle and the other end of the metal plate. One end and the other end of the metal plate constituting the bracket 191d are connected by an intermediate portion of the metal plate, and the plate surface of the one end and the other end of the metal plate constituting the bracket 191d face in parallel. As the intermediate part of the bracket 191d is fixed by welding to the other end (right end) of the outer circumferential surface of the rotating cylinder 191a, the bracket 191d is' one end and the other end of the bracket 191d are pivoting tube 191a. So as to protrude in a direction perpendicular to the axial direction of the rotating cylinder (191a).

The roller 191e is a metal cylindrical member. The roller 191e is rotatably supported by the bracket 191d.

The main clutch pin 192 is a member for supporting the main clutch lever 191 rotatably to the handle frame 171. The main clutch pin 192 of this embodiment is a substantially cylindrical member, and rotatably penetrates the rotation cylinder 191a of the main clutch lever 191. The left and right ends of the main clutch pin 192 protrude from a pair of end faces of the rotating cylinder 191a, and are fixed to a position which is left in the middle of the upper frame 171c of the handle frame 171 and on the left side thereof. 171f). The main clutch lever 191 supported by the lever supporting member 171f by the main clutch pin 192 is in the front-rear direction (a direction in which the grip 191c of the main clutch lever 191 is longitudinally and backwardly moved). It is possible to rotate.

The lever arm 193 is a metal rod-shaped member. The lever arm 193 has a curved shape so that the middle portion protrudes upward (protrudes upward) from both ends thereof (front end and rear end). The other end (rear end) of the inner wire 181b of the wire member 181 is fixed (connected) to one end (front end) of the lever arm 193.

The spacers 194a and 194b are cylindrical members. The spacers 194a and 194b are formed with through holes penetrating through a pair of end faces.

The arm pin 195 is a member which supports the lever arm 193 to the handle frame 171 so that rotation is possible. The arm pin 195 of this embodiment is a cylindrical member generally, and rotatably penetrates the through-hole formed in the other end (rear end) of the lever arm 193, and the through-hole formed in the spacer 194a, 194b. . The left and right ends of the arm pin 195 protrude from the left end of the spacer 194a and the right end of the spacer 194b, respectively, and are rearward from the position where the main clutch pin 192 is axially held in the lever support member 171f. It is moistened in the position to become. The lever arm 193 supported by the lever support member 171f by the arm pin 195 can rotate in the vertical direction (in the direction in which the front end of the lever arm 193 moves upward and downward).

When the main clutch lever 191 and the lever arm 193 are rotatably supported by the handle frame 171, the lower surface of the lever arm 193 contacts the outer peripheral surface of the roller 191e.

The operation of the stand 15 and the main clutch 16 by the main clutch stand operating mechanism 180 will be described below with reference to FIGS. 18 to 21.

In this embodiment, since the stand bar 151 is biased in the direction which rotates counterclockwise as seen from the left side by the stand spring 153, the spring member 187, the inner wire 181b, and the engagement member The sum of 182 is moved forward by the biasing force of the stand spring 153.

When the main clutch lever 191 is held in a forwardly tilted position, the lever arm 193 is in contact with the outer circumferential surface of the roller 191e while the front end of the lever arm 193 is rotated downward (from the left side) In order to maintain the state rotated counterclockwise as viewed, the sum of the spring member 187, the inner wire 181b and the engagement member 182 is pulled forward by the biasing force of the stand spring 153, It is kept moving forward. As a result, as shown in FIG. 20, the stand bar 151 rotates counterclockwise when viewed from the left side by the biasing force of the stand spring 153, and the posture of the stand 15 is set to the "retraction posture". maintain. In addition, as the engaging member 182 moves forward, the engaging arm 163 which engages with the engaging member 182, and further, the main clutch arm 161, the main clutch roller 162, and the engaging arm 163 are the main parts. It rotates clockwise when seen from the left side by the biasing force of the clutch spring 164. As a result, the main clutch roller 162 contacts (depresses) the outer circumferential surface of the belt 72c, and the tension of the belt 72c is increased, so that the main clutch 16 is 'ON'. That is, the driving force can be transmitted from the pulley 72a to the pulley 72a via the belt 72c.

When the main clutch lever 191 rotates in a direction that is inclined backward from the forwardly inclined posture, the front end of the lever arm 193 is pushed upward by the roller 191e, and the lever arm 193 is upward. Rotate to (rotate clockwise when seen from left side). As the lever arm 193 rotates upward, the other end (rear end) of the inner wire 181b is pulled upward than the case where the main clutch lever 191 is kept in a forwardly inclined position, and thus the spring member ( 187, the inner wire 181b and the engagement member 182 combined are pulled backwards (moving backwards) against the biasing force of the stand spring 153.

As a result, as shown in FIG. 21, the stand bar 151 rotates clockwise when viewed from the left side in response to the biasing force of the stand spring 153, and the posture of the stand 15 is from the "retraction posture". It changes to 'regulated posture'. In addition, as the engagement member 182 moves backward, the combination of the engagement arm 163, and thus the main clutch arm 161, the main clutch roller 162, and the engagement arm 163 is engaged with the engagement member 182. In response to the bias force of the main clutch spring 164, it rotates counterclockwise as seen from the left side. As a result, the main clutch roller 162 is spaced apart from the outer circumferential surface of the belt 72c, the tension of the belt 72c is reduced, and the main clutch 16 is 'OFF'. That is, the driving force cannot be transmitted from the pulley 72a to the pulley 72a via the belt 72c, and further, the transmission of the driving force from the engine 3 to the transmission of the walking type rice transplanter 1 is stopped.

As described above, the walking type rice transplanter 1 is provided between a restraint posture that regulates the front end of the center float 10C to move upward and a retreat posture that does not restrict the front end of the center float 10C to move upward. On-off member (engagement arm 163 in this embodiment) provided in the stand 15 which can change a posture, and the main clutch 16 which transmits the driving force from the engine 3 to a transmission, and stops it. A walking type rice transplanter having a main clutch stand operating mechanism 180 for operating the main clutch stand operation mechanism, wherein the main clutch stand operating mechanism 180 has a wire member having one end (front end) fixed to the stand 15 (this embodiment). In the form, the outer wire 181a and the inner wire 181b of the wire member 181, and the hook portion 187b of the spring member 187) are fixed to the intermediate portion of the wire member, and the main clutch 16 on and off The spring member (in this embodiment, the spring member (182) which is provided in the engagement member 182 which meshes with a member, and the intermediate | middle part of a wire member, and is provided in the position which becomes one end (front end) side of a wire member rather than the engagement member 182. A coil spring portion 187a of 187 and an operation member 190 connected to the other end (rear end) of the wire member, and operating the operation member 190 (in this embodiment, the main clutch lever). When the other end (rear end) of the wire member is pulled out by rotating the 191 in the backward longitudinal direction, the stand 15 is rotated so that the posture of the stand 15 is changed from the "retreat posture" to the "regulated posture". And the on-off member of the main clutch 16 is engaged with the engagement member 182 while the main clutch 16 is rotated (counterclockwise when viewed from the left side) so that the transmission of the walking type rice transplanter 1 The transmission of the driving force It is not. This configuration has the following advantages. That is, the main clutch 16 and the stand 15 can be operated in linkage with a simple structure (substantially one wire member) with fewer parts compared with the prior art. In addition, the structure of operating the main clutch 16 and the stand 15 in conjunction with each other can be arranged in a smaller space by using a simpler structure (substantially one wire member) with fewer parts than before. This increases the degree of freedom in designing the walking type rice transplanter 1.

When the front end of the center float 10C operates the operation member 190 in a state in which the front end portion of the center float 10C is already moved upward by receiving an external force such as buoyancy from the paddy field (in this embodiment, the main clutch lever 191 is stiffened backwards). Rotation of the stand 15, the stand 15 changes the posture of the stand 15 from the "retreat posture" to the "regulated posture" while pushing the front end of the center float 10C downward. The body 2 of the walking type rice transplanter 1 is lifted by the force which manipulates the operation member 190. FIG. In this case, great force is required when operating the operation member 190.

However, in this embodiment, since the coil spring part 187a of the spring member 187 is provided in the position which is an intermediate part of a wire member, and becomes one end (front end) side of a wire member rather than the engagement member 182, operation When the member 190 is operated (in this embodiment, when the main clutch lever 191 is rotated in the direction inclined backward), the coil spring portion 187a of the spring member 187 is elastically deformed and stretched. The posture of the stand 15 is kept in the 'retraction posture', and the main clutch 16 is immediately (surely) turned 'OFF'. As described above, the walking type rice transplanter 1 changes the posture of the stand 15 from the "retreat posture" to the "regulated posture" due to the fact that the front end of the center float 10C is already moved upward by the external force. In the case where a large force is required, it is possible to reliably switch the main clutch 16 from 'ON' to 'OFF' while maintaining the posture of the stand 15 in the 'retraction posture'.

Moreover, the stand 15 of the walking type rice transplanter 1 is connected to the stand shaft part 151a * 151e and the stand shaft part 151a * 151e rotatably supported by the base | substrate 2 (through the connection part 151b * 151d). The contact portion 151c contacting the upper surface of the center float 10C and the one end portion is fixed to the stand shaft portion 151a (via the cylinder portion 152a) when the control position is fixed. The operation arm part 152c to which the one end part of the wire member (hook part 187b of the spring member 187) is fixed is provided, and the main clutch 16 of the walking type rice transplanter 1 rotates to the base | substrate 2 The main clutch arm 161 supported by the main clutch, the main clutch roller 162 rotatably supported at one end of the main clutch arm 161, and the main clutch arm 161 are fixed to each other, and the engagement member 182 is fixed. The engagement arm 163 engaged with the main arm and the main clutch roller 162 transmit the driving force from the engine 3 to the transmission of the walking type rice transplanter 1. The main clutch spring 164 biases the main clutch arm 161 so as to rotate in the direction of contact with the belt 72c, and the engaging arm 163 of the main clutch 16 is turned on of the walking type rice transplanter 1. It corresponds to an off member.

Hereinafter, the main clutch stand operation mechanism 380 which is another embodiment of the operation mechanism of a walking type rice transplanter is demonstrated, referring FIG. In addition, below, description is abbreviate | omitted by attaching | subjecting the same member number with respect to the member same as the walking type rice transplanter 1 demonstrated with reference to FIGS.

As shown in FIG. 22, the main clutch stand operating mechanism 380 includes a first steel wire 381, an engagement member 182, a rotation bracket 383, a second steel wire 384, and an operation member 190. do.

The first steel wire 381 is one embodiment of steel wire, and is formed by linearly forming a steel material by drawing.

One end (front end) of the first steel wire 381 is hooked to form a hook portion 381a. The hook portion 381a is fixed (hung) to the through hole 152d formed in the operation arm portion 152c of the operation arm unit 152 of the stand 15 (see Fig. 17).

The intermediate portion of the first steel wire 381 forms a spiral to form a spring portion 381b. The spring portion 381b is one embodiment of the spring member and can be elastically deformed.

A portion except for the hook portion 381a and the spring portion 381b from the first steel wire 381 (more specifically, the portion caught between the hook portion 381a and the spring portion 381b of the first steel wire 381 and The sum of the parts from the rear end of the spring portion 381b to the rear end of the first steel wire 381) is one embodiment of the wire member.

An engagement member 182 is fixed to a portion of the first steel wire 381 that is the rear end of the first steel wire 381 as a middle portion of the first steel wire 381b.

The rotation bracket 383 is provided with the cylindrical part 383a, the 1st arm part 383b, and the 2nd arm part 383c.

The cylindrical portion 383a is a metallic cylindrical member. The cylindrical portion 383a is rotatably penetrated through the lower frame 171a (see FIG. 18) of the handle frame 171.

The first arm portion 383b and the second arm portion 383c are long, thin plate-shaped members made of metal. One end of the first arm portion 383b and the second arm portion 383c is fixed to the outer circumferential surface of the cylindrical portion 383a by welding. The longitudinal direction of the 1st arm part 383b and the 2nd arm part 383c fixed to the outer peripheral surface of the cylindrical part 383a is perpendicular to the axial direction of the cylindrical part 383a. Through-holes are formed in the other ends of the first arm portion 383b and the second arm portion 383c, respectively. The rear end of the first steel wire 381 is fixed to the other end of the first arm portion 383b (the rear end of the first steel wire 381 is caught by a through hole formed at the other end of the first arm portion 383b).

The second steel wire 384 is formed by linearly forming the steel material by drawing. One end of the second steel wire 384 is fixed to the other end of the second arm portion 383c (one end of the second steel wire 384 is caught by a through hole formed at the other end of the second arm portion 383c).

As described above, the main clutch stand operating mechanism 380 forms the middle portion of the first steel wire 381 in a spiral shape, thereby forming the spring portion 381b, which is a portion formed in the spiral shape among the first steel wires 381. According to one embodiment of the spring member according to the present invention, a portion of the first steel wire 381 that is not formed in a spiral shape is one embodiment of the wire member according to the present invention. This configuration has the following advantages. That is, the wire member 181 of the walking type rice transplanter 1 shown to FIGS. 1-21 is equipped with the outer wire 181a and the inner wire 181b, The walking type rice transplanter 1 is a yellow sand, for example. When used in an area with a small amount of dust, such as, the dust attached to the outer circumferential surface of the inner wire 181b in the process of using the main clutch stand operating mechanism 180 is formed inside the outer wire 181a (outer wire ( The inner circumferential surface of the 181a and the gap between the outer circumferential surface of the inner wire 181b may come in to inhibit movement (sliding) of the inner wire 181b relative to the outer wire 181a. In order to avoid such a problem, it is necessary to frequently remove the dust adhering to the surface of the inner wire 181b, resulting in complicated maintenance and repair. However, in the case of the main clutch stand operating mechanism 380, since the structure does not include the outer wire, the movement of the first steel wire 381 is inhibited by the dust attached to the outer circumferential surface of the first steel wire 381. Not easy to maintain and repair. In addition, by using a steel wire as a wire member, forming the middle portion of the steel wire in a spiral shape, and using a spiral molded portion as a spring member, the number of parts is reduced compared to the case where the wire member and the spring member are separated. It is possible to cut.

Hereinafter, the transmission mechanism 12 will be described with reference to FIGS. 23 to 25. The shift mechanism 12 is a mechanism for changing the positions of the shift gear 75 and the main shift gear 88 in the transmission mechanism 7. The shift mechanism 12 includes a shift operation shaft 411, an engagement member 412, a first travel shift arm 413, a second travel shift arm 414, a travel shift fork shaft 415, and a travel shift fork 416. ), A ball 417, a spring 418, a weekly shifting arm 419, a weekly shifting fork shaft 420, a weekly shifting fork 421, a ball 422, and a spring 423.

The shift operation shaft 411 transmits the operation force by the operator. The shift operation shaft 411 is inserted inward from the insertion hole formed in the rear surface of the mission case 23 (right member 23R) via the oil seal 23a. The rear end of the shift operation shaft 411 protrudes from the mission case 23. The shift operation shaft 411 is supported by the mission case 23 so as to be rotatable about an axis and slidably in the axial direction. At the rear end of the shift operation shaft 411, a plate-shaped portion 411a having a pair of left and right sides is formed.

The engagement member 412 is a generally cylindrical member with through holes formed in the front-rear direction. A pair of flange portions whose outer diameter is larger than the front and rear center portions are formed at both front and rear ends of the engagement member 412, and an engagement groove 412a is formed between the front and rear pair of flange portions of the engagement member 412. The shift operation shaft 411 is inserted through the through hole of the engagement member 412. The engagement member 412 is supported by the shift operation shaft 411 while being unable to rotate relative to the sliding operation shaft 411.

The first travel shift arm 413 is rotated by the engagement member 412. The first traveling shift arm 413 includes an elliptical main plate 413a, a cylindrical portion 413b, and a cylindrical engaging portion 413c. The main plate 413a is disposed with the plate surface facing up and down. At one end of the main plate 413a, the cylindrical portion 413b is fixed to penetrate the main plate 413a in the vertical direction. An engaging portion 413c is provided on the other end side of the upper surface of the main plate 413a. The engagement portion 413c is engaged with the engagement groove 412a of the engagement member 412.

The second travel shift arm 414 rotates together with the first travel shift arm 413. The second traveling shift arm 414 includes an engagement plate 414b having a cylindrical portion 414a and a generally tapered end. The cylinder part 414a is arrange | positioned making the axial direction the up-down direction. The other end of the engaging plate 414b is fixed to the lower end of the cylindrical portion 414a. The intermediate part of the cylinder part 414a is rotatably supported by the mission case 23, and the upper end part (part above upper part supported by the mission case 23) is the cylindrical part of the 1st traveling shift arm 413 ( 413b). The cylinder portion 414a is fixed to the first travel shift arm 413 while being incapable of relative rotation and incapable of sliding.

The traveling shift fork shaft 415 supports the traveling shift fork 416. The traveling transmission fork shaft 415 is disposed with its axis direction in the left and right direction, and is supported by the mission case 23 in a non-rotable manner. On the outer circumferential surface of the traveling transmission fork shaft 415, a groove portion 415a formed by arranging a plurality of grooves at predetermined intervals in the axial direction is formed.

The traveling transmission fork 416 meshes with the transmission gear 75. The traveling shift fork 416 has a through hole 416a formed in the left and right directions, an engaging portion 416b having a semicircular recess formed at an end thereof, and an engaging groove 416c having a concave shape when viewed from the front opening upward. Equipped. The travel shift fork shaft 415 is inserted through the through hole 416a, and the travel shift fork 416 is supported by the travel shift fork shaft 415 so as to be slidable in the left and right directions. The engagement portion 416b is engaged with the transmission gear 75. The engaging plate 414b of the second travel shift arm 414 is engaged with the engaging groove 416c.

The ball 417 and the spring 418 are accommodated in a hole (not shown) formed in the traveling shift fork 416 so as to be orthogonal to the through hole 416a. The spring 418 biases the ball 417 toward the traveling shift fork shaft 415 inserted into the through hole 416a. When a part of the ball 417 protrudes from the hole of the traveling shift fork 416 and is engaged with any groove of the groove 415a, the relative position of the traveling shift fork 416 with respect to the traveling shift fork shaft 415 is It becomes easy to hold | maintain in the said position.

The weekly shifting arm 419 is rotated by the shift operation shaft 411 and moved in the front-rear direction. The weekly shifting arm 419 has an engaging plate 419b having a cylindrical portion 419a and a generally tapered end. The cylindrical portion 419a is disposed with its opening facing the front-back direction. The other end of the engaging plate 419b is fixed below the front end of the cylindrical portion 419a. The shift operation shaft 411 is inserted through the cylindrical portion 419a. The cylindrical portion 419a is fixed to the shift operation shaft 411 while being unable to rotate relative to the cylinder 411a. Engagement plate 419b is disposed with one end generally downward.

The weekly shifting fork shaft 420 supports the weekly shifting fork 421. The weekly shifting fork shaft 420 is supported by the mission case 23 in a non-rotatable manner so that its axial direction is directed to the left and right directions. The outer circumferential surface of the weekly shifting fork shaft 420 is formed with a groove portion 420a formed by arranging a plurality of grooves at predetermined intervals in the axial direction.

The weekly shifting fork 421 is in engagement with the weekly shifting gear 88. The weekly shifting fork 421 has a through hole 421a formed in the left and right directions, an engaging portion 421b having a semicircular recess formed at an end thereof, and an engaging groove 421c having a concave shape when viewed from the front opening upward. Equipped. The weekly shifting fork shaft 420 is inserted through the through hole 421a, and the weekly shifting fork 421 is supported by the weekly shifting fork shaft 420 so as to be slidable in the left and right directions. The engagement portion 421b is engaged with the weekly shift gear 88. The engaging plate 419b of the weekly shifting arm 419 is engaged with the engaging groove 421c.

The ball 422 and the spring 423 are accommodated in a hole (not shown) formed in the weekly shifting fork 421 so as to be orthogonal to the through hole 421a. The spring 423 biases the ball 422 toward the weekly shifting fork shaft 420 inserted into the through hole 421a. When a part of the ball 422 protrudes from the hole of the weekly shifting fork 421 and is engaged with any groove of the groove portion 420a, the relative position of the weekly shifting fork 421 with respect to the weekly shifting fork shaft 420 is It becomes easy to hold | maintain in the said position.

Hereinafter, the operation aspect of the transmission mechanism 12 is demonstrated, referring FIG. 24 and FIG. First, the case where the position of the transmission gear 75 is changed is demonstrated.

When the shift operation shaft 411 is slid in the axial direction (front and rear direction), the engagement member 412 also moves in the front-rear direction together with the shift operation shaft 411. When the engagement member 412 moves in the front-rear direction, the engagement portion 413c generally moves in the front-rear direction together with the engagement member 412, and the first travel shift arm 413 is centered on the cylindrical portion 413b. Rotate. When the first travel shift arm 413 rotates, the second travel shift arm 414 also rotates together with the first travel shift arm 413. When the second travel shift arm 414 is rotated, the travel shift fork 416 is driven by the engagement plate 414b engaged with the engagement groove 416c of the travel shift fork 416. Sliding in the direction (left and right directions). When the travel shift fork 416 slides in the left and right directions, the shift gear 75 moves along the shift shaft 74 together with the travel shift fork 416.

Thus, by changing the position of the transmission gear 75 with respect to the transmission shaft 74, the traveling and stopping of the walking type rice transplanter 1, the driving direction (forward and backward), and the traveling speed (forward forward 1 speed) And 2 forward speeds (that is, changing the traveling speed) can be made.

On the other hand, each groove of the groove portion 415a of the traveling transmission fork shaft 415 is the position of the transmission gear 75 with respect to the transmission shaft 74 (from the first position from the left to the fourth position from the left). It is formed at the position corresponding to. Thereby, the traveling transmission fork 416 can be maintained in each position.

Next, the case where the position of the weekly speed change gear 88 is changed is demonstrated.

When the shift operation shaft 411 is rotated around the axis, the weekly shift arm 419 also rotates around the cylindrical portion 419a together with the shift operation shaft 411. When the weekly shifting arm 419 rotates, the interlocking plate 419b engaged with the engaging groove 421c of the weekly shifting fork 421 causes the weekly shifting fork 421 to move in the axial direction of the weekly shifting fork shaft 420. Sliding side to side). When the weekly shifting fork 421 slides in the left and right directions, the weekly shifting gear 88 moves along the weekly shifting shaft 85 together with the weekly shifting fork 421.

In this way, it is possible to switch (change) the daytime of the walking type rice transplanter 1 by changing the position of the weekly speed change gear 88 with respect to the weekly speed change shaft 85.

On the other hand, each groove of the groove portion 420a of the weekly shifting fork shaft 420 is the position of the weekly shifting gear 88 with respect to the weekly shifting shaft 85 (from the first position from the left to the fifth position from the left). Is formed at a position corresponding to Thereby, the weekly speed change fork 421 can be maintained at each position.

In addition, when the shift operation shaft 411 is slid in the axial direction, the engaging plate 419b of the weekly shifting arm 419 moves within the front and rear width of the engaging groove 421c of the weekly shifting fork 421. As a result, the engagement plate 419b and the engagement groove 421c are engaged with each other regardless of the axial position of the shift operation shaft 411, and when the shift operation shaft 411 is rotated, the weekly shift fork 421 is moved in the horizontal direction. Can be slid.

As described above, by operating the shift operation shaft 411, it is possible to change the traveling speed and change the daytime. Thereby, despite the two shifts of changing the traveling speed and changing the daytime, only one shifting operation shaft 411 is sufficient for the operation shaft projecting from the inside of the mission case 23 to the outside. 23, the insertion hole formed on the rear surface of the rear case reduces the possibility of mud or dust getting into the sliding portions of the mission case 23 and the shift operation shaft 411, so that oil leakage or Intrusion of mud and dust can be suppressed.

Hereinafter, the shift operation mechanism 13 will be described with reference to FIGS. 26 to 28. The shift operation mechanism 13 is a mechanism for sliding the shift operation shaft 411 in the shift mechanism 12 in the axial direction and rotating around the axis. The shift operation mechanism 13 includes a travel shift lever guide 431, a shift rod 432, a bolt 433, a nut 434, a weekly shift lever 435 as a second operation tool, and a travel shift lever lever member 436. ), A traveling shift lever 437 as a first operating tool, a washer 438, a spring 439, a lever guide sheet 440, an instruction pin 441 as an instruction member, and a display member 442 as a display member. do.

As shown in FIG. 26, the traveling shift lever guide 431 shows the operation direction of the traveling shift lever 437 to an operator, and guides the traveling shift lever 437. As shown in FIG. The traveling shift lever guide 431 is formed of a metal plate, a resin plate, or the like, and is disposed with the rear plate face facing upward. A guide hole 431a is formed in the traveling shift lever guide 431 in the left and right directions. The traveling shift lever guide 431 is fixed to the upper part of the center planting case 27C via the vertical conveyance case 65. The vertical conveyance case 65 is a member which accommodates the vertical conveyance apparatus 62 of the mother supply apparatus 6.

As shown to FIG. 26 to FIG. 28, the shift rod 432 transmits the operation force by an operator to the shift operation shaft 411. As shown to FIG. The speed change rod 432 includes a main plate 432a, a connecting plate 432b and 432c, a cylinder portion 432d, a flange portion 432e and 432f, and an engagement groove 432g. The main plate 432a is a plate formed in an generally oval shape. The main plate 432a is disposed so that the plate surface faces forward and backward, and the longitudinal direction generally faces the left and right directions. The connecting plates 432b and 432c are a pair of left and right plate members protruding forward from the front surface of the main plate 432a. One connecting plate 432b is disposed on the left side of the left and right centers of the main plate 432a, and the other connecting plate 432c is disposed on the right side of the left and right centers of the main plate 432a. These left and right connecting plates 432b and 432c are provided to face each other at a predetermined interval. The cylinder portion 432d is a generally cylindrical member that projects from the rear surface of the main plate 432a toward the rear side. The cylinder portion 432d is disposed at the left and right centers of the main plate 432a. The flange portions 432e and 432f are formed at the rear end and the front and rear middle portions of the cylinder portion 432d and are a pair of front and rear circular plate-shaped portions having a diameter larger than the diameter of the cylinder portion 432d. A gap of a predetermined interval is provided between the flange portions 432e and 432f. The engagement groove 432g is a groove formed between the flange portions 432e and 432f.

The plate-shaped part 411a of the shift operation shaft 411 which is outside the mission case 23 is inserted between the left and right connecting plates 432b and 432c. The bolt 433 is inserted through the connecting plate 432c on the right side, the plate portion 411a, and the connecting plate 432b on the left side, and is fastened by the nut 434 on the left side of the connecting plate 432b. The shift operation shaft 411 and the shift rod 432 are connected. At this time, the shift operation shaft 411 and the cylindrical portion 432d of the shift rod 432 are disposed on the same axis.

The weekly shift lever 435 rotates the shift rod 432 around the axis. The weekly shift lever 435 is formed by bending a cylindrical member, and is disposed with its axial direction substantially in the vertical direction. The lower end of the weekly shift lever 435 is fixed above the outer circumferential surface of the cylinder portion 432d of the shift rod 432. By bending the middle portion in the longitudinal direction of the weekly shift lever 435, the upper portion of the weekly shift lever 435 is inclined leftward with respect to the lower portion. The upper end of the weekly shift lever 435 is equipped with a grip for the operator. The weekly shift lever 435 is operated by the operator from the shift rod 432 by the walking type rice transplanter 1 using the operation unit 17 so as not to reach the operator located behind the base 2 during the simulated planting operation. Although it is impossible, it extends to the position which can be operated from the operator who stopped this operation | movement and moved to the side of the base | substrate 2 (in this embodiment, the advancing direction left). The operator can operate the weekly shift lever 435 in the left side of the walking type rice transplanter 1 (more specifically, in front of the left side frame 26L while being the left side of the engine stage 21).

In this embodiment, the upper part of the weekly shift lever 435 is inclined leftward so that the weekly shift lever 435 may not protrude largely to the right from the center frame 24 when viewed in plan. This prevents the right axle case 25R from interfering with the weekly shift lever 435 when the right axle case 25R rotates up and down. In addition, the shape and arrangement | positioning of the weekly shift lever 435 are not limited to the thing of this embodiment, The shape and arrangement | positioning which an operator can stand and operate in the right side of the walking type rice transplanter 1 may be sufficient.

The traveling shift lever lever member 436 transmits the operation force by the operator to the shift rod 432. The traveling shift lever lever member 436 includes a cylindrical portion 436a and engagement plates 436b and 436c. The cylindrical portion 436a is inserted through the cylindrical pivoting lever member 24c provided on the upper surface of the center frame 24. The rotating lever member 24c is disposed on the left side while being the front and rear middle portions of the center frame 24. The engaging plates 436b and 436c are a pair of upper and lower plates which protrude toward the right side from the cylindrical portion 436a. The upper engaging plate 436b faces the upper end of the cylindrical portion 436a, and the lower engaging plate 436c faces the engaging plate 436b at a lower distance from the lower side of the upper engaging plate 436b, respectively. Is placed. The right end side of the engaging plate 436b * 436c is formed in taper shape, and the right end is formed in substantially circular shape. The right end of the engaging plate 436b and 436c is engaged with the engaging groove 432g with the cylindrical portion 432d interposed from above and below.

The travel shift lever 437 operates the shift rod 432 in the axial direction. The traveling shift lever 437 is formed by bending a cylindrical member. One end (lower end) of the travel shift lever 437 is fixed to the rear side of the outer circumferential surface of the cylindrical portion 436a of the travel shift lever lever member 436. The other end (upper end) side of the traveling shift lever 437 is inserted through the guide hole 431a of the traveling shift lever guide 431. From the traveling shift lever 437 and the traveling shift lever lever member 436, a hand is reached by an operator located behind the base 2 during the simulation planting operation by the walking type rice transplanter 1 using the operation unit 17. It extends to an operable position (in front of the mother mounting base 61 in this embodiment). The upper end of the traveling shift lever 437 is equipped with a grip for the operator. In the middle part of the longitudinal direction of the traveling shift lever 437 (before the part inserted into the guide hole 431a of the traveling shift lever guide 431), the engaging portion (protrudes so as to partially protrude from the outer circumferential surface of the traveling shift lever 437) 437a) is formed. In addition, the shape and arrangement | positioning of the traveling shift lever 437 are not limited to the thing of this embodiment, What is necessary is just a shape and arrangement which an operator in operation can operate.

As shown in FIG. 26, the washer 438 is inserted through the traveling shift lever 437, and hangs from the rear (upper side) by the locking part 437a of the traveling shift lever 437. As shown in FIG. The spring 439 is a compression spring inserted into the travel shift lever 437. The spring 439 is disposed above the washer 438 in the travel shift lever 437. The lever guide sheet 440 is inserted through the traveling shift lever 437. The lever guide sheet 440 is disposed above the spring 439 in the traveling shift lever 437 and below the traveling shift lever guide 431.

The travel shift lever guide 431 is in contact with the travel shift lever guide 431 and the lever guide seat 440 and the spring 439 is shortened by a predetermined length between the washer 438 and the lever guide seat 440. It is fixed. Thereby, the lever guide sheet 440 is pressed against the traveling shift lever guide 431 by a predetermined force by the biasing force of the spring 439. The lever guide sheet 440 is fitted into a guide groove (not shown) formed along the guide hole 431a of the travel shift lever guide 431. As a result, the traveling shift lever 437 is guided to move along the guide hole 431a of the traveling shift lever guide 431.

As shown to FIGS. 26-28, the instruction | indication pin 441 indicates the forward-backward position of the transmission rod 432, and the rotation position around an axis line (axis line of cylinder part 432d). One end (right end) of the instruction pin 441 is fastened to the bolt 433 from the left side of the nut 434. The other end (left end) of the instruction pin 441 protrudes to the left from the bolt 433. The left end of the indicating pin 441 is thinner than the right end.

The display member 442 restricts the operation range of the instruction pin 441 and indicates the position of the instruction pin 441. The display member 442 has a fixed portion and a guide portion, and is formed by bending the plate-shaped member into a 'L' shape when viewed in plan view. The fixing portion extends in the left and right direction and is fixed by a suitable method to the center frame at its front surface (a surface generally perpendicular to the axial direction of the shift operation shaft 411). The guide portion extends rearward from the right end of the fixing portion so that the right side surface (surface substantially parallel to the axial direction of the shift operation shaft 411) faces the shift rod 432. The guide portion is formed such that the guide hole 442a penetrates in the left and right directions. The left end of the instruction pin 441 is inserted through the guide hole 442a. The guide hole 442a is formed in a substantially rectangular shape when viewed from the side, and a plurality of recesses are formed at predetermined intervals in the circumferential direction around the guide hole 442a of the guide part.

Hereinafter, the operation mode of the shift operation mechanism 13 will be described with reference to FIGS. 27 and 28. First, the case where the traveling shift lever 437 is operated will be described.

When the operator operates the travel shift lever 437 in the left and right direction, the travel shift lever lever member 436 fixed to the lower end of the travel shift lever 437 also rotates around the pivot lever 24c. When the traveling shift lever lever member 436 rotates, the right end of the engaging plate 436b and 436c generally moves in the front and rear directions, and the shifting rod 432 that engages with the engaging plate 436b and 436c also moves in the front and rear directions. . When the shifting rod 432 moves in the front-back direction, the shifting operation shaft 411 connected to the shifting rod 432 slides in the axial direction (front-rear direction).

In this way, by operating the travel shift lever 437 in the left and right direction, the shift operation shaft 411 can be slid in the front-rear direction, and further, the travel and stop of the walking type rice transplanter 1, the travel direction (forward and Reversing), and it is possible to switch the traveling speed (forward 1 speed and forward 2 speed) at the time of forward movement.

Next, the case where the weekly shift lever 435 is operated will be described.

When operating the weekly shift lever 435, first, an operator moves to the position (left side of the walking type rice transplanter 1 in this embodiment) which can operate the weekly shift lever 435. As shown in FIG. When the operator grasps the upper portion of the weekly shift lever 435 and rotates around the axis of the shift rod 432, the shift rod 432 fixed to the lower end of the shift lever 435 also has an axis (column portion 432d). Axis of rotation). When the shift rod 432 rotates around the axis, the shift operation shaft 411 connected to the shift rod 432 rotates around the axis.

In this way, by operating the weekly shift lever 435 in the up and down direction, it is possible to rotate the shift operation shaft 411 around the axis line, and furthermore, the simulation interval (weekly) planted by the walking type rice transplanter 1. It is possible to switch.

Further, the recessed portion of the guide hole 442a of the display member 442 is formed at a position where the operator can recognize the position of the instruction pin 441. That is, as shown in FIG. 28, four recessed parts are formed in the upper part and the lower part of the guide hole 442a, respectively at predetermined intervals in the front-back direction. The four recesses are formed so as to correspond to the forward and backward positions of the instruction pin 441 when shifting to the second forward speed, the first forward speed, the neutral, and the reverse direction. In addition, five recesses are formed in the front and rear portions of the guide hole 442a at predetermined intervals in the vertical direction. Five recesses are formed so as to correspond to the up-down position of the instruction pin 441 when shifting to the first, second, neutral, three, and four weekly speeds. As a result, the operator can visually observe whether the instruction pin 441 is inserted through the position corresponding to which recess of the guide hole 442a, and the present walking type rice transplanter 1 can be observed from the visual result. You can recognize the gearshift stage. In addition, in this embodiment, the recessed part formed in the position corresponding to neutral is formed large compared with the other recessed part. As a result, the operator can easily recognize the neutral position.

In addition, the structure of the shift operation mechanism 13 is not limited to the thing of this embodiment, The structure which can rotate around the axis while sliding the shift operation shaft 411 to an axial direction by independent operation tools, respectively, In addition, the operation tool for changing the driving speed is placed in an operable position where the worker can be touched by the mock planting worker, and the operation tool for changing the daytime is inoperable because the operator does not touch the worker during the mock planting work. What is necessary is just a structure arrange | positioned at. In addition, the shape and arrangement | positioning of the instruction | indication pin 441 and the display member 442 are not limited to the thing of this embodiment. That is, the instruction pin 441 may be configured to move in conjunction with the shift operation shaft 411, and the display member 442 may be a shape and an arrangement in which an operator can recognize the position of the instruction pin 441.

As described above, the walking type rice transplanter 1 according to the present embodiment shifts the power transmitted from the engine 3 and the planting apparatus 5 for planting seedlings on the pavement, and the left wheel 4L and the right side. A walking type rice transplanter (1) having a wheel (4R) and a power transmission mechanism (7) to be transmitted to the planting device (5), wherein the transmission mechanism (7) is operated by sliding in the axial direction so that the left wheel (4L) and the right wheel ( The shift operation shaft 411 which changes the transmission ratio of the power transmitted to 4R) and rotates around an axis, and changes the transmission ratio of the power transmitted to the planting apparatus 5 by the transmission mechanism 7, It is arrange | positioned in the position which can be operated from an operator, and it is arrange | positioned in the position which is inoperable from a worker in operation, and the traveling shift lever (1st operation tool) 437 which slides the shift operation shaft 411 to an axial direction, Rotate 411 around the axis Weekly shift lever which is smaller (the second manipulation member) is provided with a 435. By such a configuration, it is possible to easily and accurately change the traveling speed and the change of the daytime, thereby improving workability. That is, the operator can change the traveling speed only by operating the traveling shift lever 437 in the left and right directions. In addition, an operator can move to the left side of the walking type rice transplanter 1, and can change a daytime only by operating the weekly shift lever 435 to an up-down direction. In this way, the weekly shift lever 435, which is frequently used for work in one pavement, is placed in an inoperable position out of reach of the worker in operation, and the traveling shift lever 437 where the frequency of use is high. By arranging the) in an operable position where the worker can reach it, the operator can operate the traveling shift lever 437 without being confused when changing the traveling speed during the work, thereby preventing misoperation. It becomes possible to improve workability. In addition, by changing the traveling speed and changing the daytime by separate operation tools (the driving shift lever 437 and the weekly shift lever 435), the operation method of each operating tool can be simplified, thereby improving workability. It becomes possible. In addition, since the operation of each operating tool is independent, there is no need to change the daytime when changing the traveling speed, and there is no need to change the running speed when changing the daytime, thus eliminating unnecessary shifting operations. It becomes possible to suppress abrasion and deterioration of the transmission gear 75, the weekly transmission gear 88, and the like. In addition, by arranging the weekly shift lever 435 having a low operation frequency at an inoperable position from the working worker, it is possible to save space around the worker (the range that can be operated by the working worker). In addition, despite the change of the traveling speed and the daytime by the two operation tools (the traveling shift lever 437 and the weekly shift lever 435), the operation shaft projecting from the mission case 23 is the shift operation shaft 411. Since only one is enough, the possibility of mud or dust getting into the sliding portions of the shift operation shaft 411 and the mission case 23 is reduced, and the occurrence of oil leakage or the mud or dust inside the mission case is reduced. Intrusion suppression, etc. can be aimed at.

In addition, the walking type rice transplanter 1 interlocks with the shift operation shaft 411, and moves to the axial direction of the shift operation shaft 411, or the instruction pin 441 (instruction member) which rotates around an axial line, and an instruction pin. Transmission ratio of power transmitted by the transmission mechanism 7 to the left wheel 4L and right wheel 4R based on the position of 441 and transmission ratio of power transmitted by the transmission mechanism 7 to the planting device 5. It is provided with the display member 442 which displays. By such a configuration, the position of the instruction pin 441 is confirmed by the display member 442, and the transmission ratio of the power transmitted to the left wheel 4L and the right wheel 4R and the planting device 5 can be easily confirmed. It is possible to, and further improve workability.

The present invention can be applied to a walking type rice transplanter.

One… Walking type rice transplanter 2. gas
3 ... Engine 4L… Left wheel (wheel)
4R... Right wheel 5. Planting device
6 ... Module feeder 7... An electric appliance
11 ... Transmission mechanism 13.. Shifting mechanism
111... Shift control shaft 135... Weekly shift lever (second operation tool)
137 ... Travel shift lever (first operation tool) 141... Instruction pin (instruction member)
142 ... Display member

Claims (2)

A walking type rice transplanter comprising a planting device for planting a pavement, a power transmission from an engine, and a wheel and a power transmission device for transmitting the planting device to the planting device. A shift operation shaft for changing the speed ratio of the power transmitted to the plant and the rotation ratio around the axis to change the speed ratio of the power transmitted to the planting device, and a position within reach of the worker during planting work. And a first operation tool for sliding the shift operation shaft in the axial direction, and a second operation tool for displacing the shift operation shaft around the axis and arranged at a position not reachable by an operator in planting operation. Yianggi. The method of claim 1,
An instruction member that moves in the axial direction of the transmission operation shaft or rotates about an axis in association with the shift operation shaft, and a transmission ratio of power transmitted by the transmission mechanism to the wheel based on the position of the instruction member; The walking type rice transplanter provided with the display member which displays the gear ratio of the power which a transmission mechanism transmits to the said planting apparatus.

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