JP2007289026A - Self-propelled working truck for seedling planting use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-propelled working truck for seedling planting use, ensuring a relevant operator to make a work in either posture with his back forward or rearward depending on his liking or forte. <P>SOLUTION: The self-propelled working truck for seedling planting use has the following construction and mechanism. Both of parallel left and right side frames (8) of a vehicle body (F) extending longitudinally at a given spacing nearly corresponding to a ridge width (w) are formed in an invertedly V-shaped way so as to be divergent upward with the steerable wheel (1) and the driving wheel (2) sinking lower than a ridge height (h) in a longitudinally mutual manner when viewed sideways. The forwardly rising inclination side of the frames (8) is served as a front side seat receiving seat (9f), while the rearwardly rising inclination side facing on the forwardly rising inclination side as a rear side seat-receiving seat (9r), The angles of inclination (α) of both the seats (9f) and (9r) are correspondingly formed so as to be nearly equal to each other, and a seat (S) for a single operator use prepared beforehand is designed to be detachably usable through interchanging rearwardly for the seat (9f) and forwardly for the seat (9r). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a self-propelled working cart for planting vegetable seedlings such as sweet potatoes, potatoes, and taros on a field basket.

  As a self-propelled working cart used by a worker sitting on the car body to plant vegetable seedlings such as sweet potatoes, potatoes, and taros on a multi-film covered cocoon, Various inventions found in patent documents have been proposed.

Among them, Japanese Patent Laid-Open No. 2003-38008 defines a work space portion (9) that communicates with the upper surface of the bag (G) at the middle portion of the body frame (12) (12). 12b) is bent, and a pair of left and right steps (10) and (10) are provided on the lower side thereof. It is considered that each of them is a known technique that is most similar to the present invention in that it includes a pair of scissors guide rollers (9) that abut and roll on both the left and right side surfaces of U).
JP-A-6-343304 JP 2002-360034 A JP 2003-38008 A JP 2004-267069 A JP-A-2005-46129 JP 2005-65616 A JP 2005-110610 A JP 2005-210999 A

  However, in the above-mentioned two known inventions, a forward-facing seat is installed at the rear of the aircraft because of the positional relationship with the aircraft that is determined to travel forward with the rear wheel as the drive wheel. As a worker who sits down, he will be forced to plant in a forward-facing posture, and he can not meet the demands of workers who like and get good work in a reverse-facing posture, It is still inconvenient in use.

  In this regard, if the seat is left in the forward installation state and the aircraft is driven backward, the worker can perform planting work in a backward posture, but as a result, the driving wheel forms the front wheel, The aircraft cannot be steered correctly and smoothly along the heel. It can be said that the scissors guide roller described in Japanese Patent Application Laid-Open No. 2005-46129 can exhibit leading steering performance for the first time because it is in the front position in the traveling direction of the machine body.

  Even if the heel guide roller contacts and rolls on the left and right side surfaces of the heel, not only the rear wheel that is driven to rotate, but also the front wheels do not swing around the vertical axis, so the heel is bent. If this is the case, the aircraft will not be able to travel correctly and smoothly along the kite, leading to a collapse of the kite and damage to the multi-film.

  On the other hand, in the case of an airframe (body frame) having a V-shaped space portion as disclosed in Japanese Patent Application Laid-Open No. 2003-38008, it is conceivable to install a seat at the front side position of the space portion. If installed, the manufacturing cost will be higher and the weight will be increased.

  SUMMARY OF THE INVENTION The present invention aims to improve such a problem, and in order to achieve the object, in claim 1, a rigid vehicle body in a fixed frame state maintaining a constant interval substantially corresponding to the ridge width of the field, and its front part A pair of left and right steerable wheels that support the vehicle, a pair of left and right drive wheels that also support the rear part of the vehicle body, a DC motor and a battery that rotationally drive the drive wheels, and a position ahead of the steerable wheels of the vehicle body And a pair of left and right leading rolling rollers that are in contact with the both side surfaces of the heel, and a pair of seedling storage trays that are attached to the front and rear parts of the vehicle body and used in one direction. A self-propelled work cart for planting seedlings that travels forward,

  The pair of left and right parallel side frames extending along the front-rear direction of the vehicle body is a floor in which the front and rear sides of the steerable wheels and the drive wheels are substantially horizontal, and the side view is depressed below the heel height. While shaping it into a nearly U shape,

  The front side of both side frames raised from the floor is the front seat receiving seat, the rear side of both side frames facing this is the rear seat receiving seat, and both seat receiving seats are substantially equal to the above floor. Keep a constant crossover angle,

  A single-seat seat can be used interchangeably with the rear seat to the front seat seat and the front seat to the rear seat seat, and can be detachably attached to each seat seat. However, it is characterized in that the relationship is set so that the worker sitting on the seat is in a posture state straddling the heel.

  Further, in the configuration of claim 2, the both side frames of the vehicle body are shaped into an approximately inverted H-shape that expands upward in a side view in which the floor is the bottom part,

  While maintaining the front seat seat on the front side in both side frames and the rear seat seat on the rear side facing this at a constant inclination angle substantially equal to each other crossing the floor,

  The seat is mounted so as to be adjustable in the vertical direction and the front-rear direction along each seat receiving seat having a certain inclination angle.

  In the configuration of claim 3, each of the footrest plates in which a large number of mud dropping holes are distributed is welded to the floors of both side frames,

  A foot accelerator pedal is attached to either the left or right of the footrest plate so as to be freely changeable to the other.

  In the configuration of claim 4, the seat is formed as a chair formed of a substantially horizontal seat surface and a backrest surface, and a gate-shaped leg frame in front view corresponding to a predetermined interval of the vehicle body is fixed and horizontally mounted on the lower surface thereof,

  The fixed angle at which the left and right side mounting pieces on the left and right sides of the leg frame cross each other and the seat surface is almost equal to the fixed angle at which the front seat seats and rear seat seats of both side frames cross the floor. It was made to be characterized.

  In the configuration of claim 5, two front connection beams parallel to the front portions of both side frames are horizontally fixed and horizontally mounted, and the seedling storage tray is detachably attached to both front connection beams from above,

  Both front and rear beams are pivotally attached to the left and right ends of the side frames that extend laterally from both side frames via swivel shafts so that the steerable wheels can swing and swing within a certain angular range. It is characterized by.

  In the structure of Claim 6, the front part of both side frames is used as a front nose that continuously rises from the floor, and a pair of left and right leading idler roller suspension hangers are suspended integrally from the vicinity of the front end parts of both front noses. As well as

  A pair of left and right leading rolling rollers are supported on both suspension hangers in a tilted posture state facing a substantially C shape in a front view, and are respectively pivotally supported so as to be adjustable in the vertical and horizontal directions.

  In the configuration of claim 7, the rear parts of the side frames are rear masts that continuously stand from the floor, and a pair of right and left seedling storage trays are provided from a horizontal rear reinforcing bar that is fixedly mounted horizontally at the middle height position of both rear masts. As the side support plate is vertically suspended,

  The seedling storage tray is pivotally attached to both side support plates so as to freely adjust the undulating rotation angle.

In the configuration of claim 8, a pair of left and right battery receiving frame bases are provided on two rear connecting beams that are fixed horizontally across the upper ends of rear masts that are continuously suspended from the floor at the rear of both side frames. Equipped with

  The first transmission sprocket and a pair of left and right second transmission sprockets are fitted and integrated in parallel on a horizontal transmission shaft that is horizontally placed between the left and right sides of both battery receiving frame bases,

  While connecting the first transmission sprocket and the output sprocket of the DC motor by the first transmission chain,

  A pair of left and right third transmission sprockets pivotally supported so as to be able to rotate integrally with a drive wheel at the lower end of the rear mast and the second transmission sprockets are connected by a second transmission chain, respectively.

  Further, according to the ninth aspect of the present invention, a pair of side-pull clutches that act independently on the left and right sides are attached to both ends of the transmission shaft, and the left and right sides of the drive wheels are in a free state by pulling the clutches laterally outward. It is characterized in that it is determined so that only the remaining other can be rotationally driven.

  According to the above configuration of claim 1, to the front seat seats of the left and right side frames forming the vehicle body in relation to the self-propelled work carriage that travels forward in one direction on the seat for one worker. It can be used interchangeably as rearward and also forward-facing to the rear seat seats of both side frames, providing convenience and versatility that can accommodate the preferences and abilities of the operator.

  In any of these usage conditions, the front and rear wheels of the steerable wheel and drive wheel are used as a substantially horizontal floor, and both feet are placed on the floors of both side frames and seated on the seat. Since the person inevitably becomes the posture state straddling the cocoon and approaches the upper surface of the cocoon, the planting operation of the vegetable seedling can be performed with light labor without being forced to bend the work posture.

  In that case, since a pair of seedling storage trays are attached and used on the front and rear of the vehicle body, an operator who sits on the seat regardless of whether the seat is attached forward or backward. Can quickly and easily grab vegetable seedlings from the seedling storage tray that faces the position in front of the eyes, helping to improve work efficiency.

  Furthermore, the front wheel that supports the front part of the vehicle body is a steerable wheel (caster), and a pair of left and right leading idler rollers that contact and roll across the side surfaces of the heel are pivotally supported at the front position thereof. Therefore, even when the kite is bent, the steerable wheel that swings and swivels by itself following the leading idler roller has the effect of allowing the vehicle body to travel correctly and smoothly along the kite. .

  In particular, if the structure of claim 2 is adopted, a vegetable seedling planting space can be secured as wide as possible, and getting on and off the seat is facilitated, so it is more beneficial for workers with large bodies. It becomes.

  If the structure of Claim 3 is employ | adopted, even if it is a boots which an operator wears, this can be stably supported by a footrest board, and the operation | work is carried out by the foot accelerator pedal changed according to the change of direction in the said seat. There is also an effect that the user can conveniently adjust the running speed of the vehicle body and stop using one leg of the advantage.

  If the structure of Claim 4 is employ | adopted, the seat of the chair form also provided with the backrest surface can seat a worker who works for a long time comfortably, and the left and right side attachment pieces of the leg frame The angle at which the vehicle and the horizontal seat surface intersect with each other is substantially equal to the angle at which the front seat receiving seat and the rear seat receiving seat intersect with the horizontal floor on both side frames of the vehicle body. The seats can be mounted and used on the front seat seat and the rear seat seat at almost the same mounting angle (posture) at all times, and in this sense, the interchangeability is excellent.

  Further, if the configuration of claim 5 is adopted, the front seedling storage tray and the steerable wheels (casters) are also used by combining two horizontal front connection beams fixedly mounted horizontally on the front portions of both side frames. ), And the steerable wheels are restricted to swivel only within a certain angular range around the swivel axis's vertical axis. There is also an effect that the vehicle body can be surely steered along the heel.

  If the structure of Claim 6 is employ | adopted, it will be on the both sides | surfaces of a cage | basket as the inclination attitude | position state which a pair of left and right leading idler roller in the front position of the said steerable wheel faces substantially C shape of a front view. It has the effect of being able to respond to changes in the height and width of the heel, making contact well and being adjustable in the vertical and horizontal directions.

  Furthermore, if the structure of Claim 7 is employ | adopted, the horizontal rear reinforcement cover which reinforces the mid-height position of the rear mast in both side frames, and a pair of left and right side support plates which will stand vertically from now on are utilized. The rear seedling storage tray can be reasonably attached, and the seedling storage tray can be adjusted with an up-and-down rotation angle. The vegetable seedlings can be easily picked up from the seedling storage tray.

  If the structure of Claim 8 is employ | adopted, since the rotational drive mechanism of the drive wheel provided with the structure is concentrated and installed in the rear part of a vehicle body, a gravity center can be biased in the rear part, and a vegetable seedling When changing the row of ridges for planting, there is an effect that the lifting and turning operation of the front portion of the vehicle body can be easily performed.

  In that case, if the configuration of claim 9 is adopted, either the left or right side pull clutch is pulled to cut off the rotational driving force for one of the driving wheels, and only the remaining other driving wheel is rotationally driven. This makes it possible to turn the vehicle body around this point as a fulcrum, so that the elderly can be quickly and easily operated by the elderly and women.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The self-propelled work carriage is a frame fixed state that maintains a constant interval substantially corresponding to the width (w) of the field, as is apparent from FIGS. A rigid vehicle body (F), a pair of left and right steerable wheels (front wheels) (1) that support the front portion thereof, and a pair of left and right drive wheels (rear wheels) that also support the rear portion of the vehicle body (F) ( 2) and a seat that is attached to the vehicle body (F) so that it can be attached to the vehicle body (F) in a detachable and convertible manner as a positional relationship interposed between the front and rear of the steerable wheel (1) and the drive wheel (2). (S) and a pair of left and right leading idler rollers (3) pivotally supported so as to come into contact with both side surfaces of the heel (G) to the front position of the steerable wheel (1) in the vehicle body (F). ), A DC motor (4) for rotating the drive wheel (2), and a battery (5) And a pair of seedling storage trays (6) and (7) that are detachably attached to the front and rear parts of the vehicle body (F), and are forward-facing according to preference and gain to the seat (S). Alternatively, one worker (M) sitting on the back picks up the vegetable seedlings (V) such as sweet potatoes, potatoes, and taros from the seedling storage tray (6) (7), and plantes them in the basket (G). It is supposed to work. An arrow sign (A) indicates a predetermined traveling (forward) direction of the work carriage.

  First, regarding the specific configuration of the vehicle body (F), as shown in FIGS. 7 to 9, this includes a pair of left and right parallel side frames (8) extending along the front-rear direction. The both side frames (8) are made of metal square pipe material, the middle part is a substantially horizontal floor (8a) sinking lower than the heel height (h), and the front part is more than the heel height (h). The rear nose has a high front nose (8b) and a rear mast (8c) that stands up taller than the front nose (8b).

  In that case, the front side portion protruding from the boundary between the floor (8a) and the front nose (8b) at the bottom of the side frames (8) serves as the front seat seat (9f), and the floor (8a) and the rear mast ( 8c) are rear side seats (9r) that are raised at the boundary with the rear seat receiving seats (9r) at their substantially equal constant inclination angles (α) (for example, about 65 degrees) of the inverted H-shape that expands upward from each other. The front seat seat (9f) and the rear seat seat (9r) are each formed with a plurality of the same bolt receiving holes (10).

  In other words, the single-seat seat (S) is interchangeable backward to the front seat seat (9f) and forward to the rear seat seat (9r) according to the preference and strength of the worker (M). In any of these cases, the seat seats (9f) and (9r) have a fixed inclination angle (α) intersecting with the floor (8a). Therefore, the mounting position of the seat (S) can be adjusted in the vertical direction and the front-rear direction along this.

  In this respect, in the illustrated embodiment, a seat support of a separate metal square pipe material that also serves as a reinforcement for the boundary portion where the floor (8a) and the rear mast (8c) of both side frames (8) bend at a substantially right angle. The elbow (8d) is welded, and the attached support elbow (8d) is used as the rear side portion to form a rear seat seat (9r) with a constant inclination angle (α). The front seat seat (9f) on the side and the rear seat seat (9r) on the rear side are set to a constant crossing angle (α) of about 90 degrees from the floor (8a) on the substantially horizontal bottom. The front seat seat (9f) and the rear seat seat (9r) may be suspended in parallel to the both side frames (8) of the vehicle body (F). And the bottom that will be interposed between the front and rear of the drive wheel (2) It is sufficient if it is shaped as a pair of facing each other across the floor (8a).

  And since the floor (8a) of both side frames (8) is welded to the left and right pairs of footrest plates (punching metal) (12) having a number of mud dropping holes (11), the seat Regardless of whether (S) is mounted forward or backward, the footrest plate (12) can also be used, and an operator who sits on the seat (S) with both feet on it ( M) is in a posture state straddling itself and G (G).

  Similarly, in the horizontal middle part of the front nose (8b) in both side frames (8), two parallel connecting beams (13) made of a metal square pipe material are fixed horizontally from above by welding. It is horizontally mounted, and both left and right ends of both front connection beams (13) are in a state of projecting laterally from both side frames (8) by a certain length. (14) is a pair of left and right leading idler hanger suspension hangers integrally hanging from the vicinity of the front end of the front nose (8b), which is also made of a metal square pipe material. Similarly, reference numeral (15) denotes a hand switch mounting seat that projects integrally inward from the vicinity of the front end of either the left or right (preferably the right) of the front nose (8b).

  On the other hand, on the upper ends of the rear masts of the rear mast (8c) in both side frames (8), two parallel connecting beams of the rear connection beam (16) made of a metal square pipe material are horizontally inserted by welding. A pair of left and right battery receiving frame bases (17) that form a gate shape in a side view are provided at the intersections of the rear mast (8c) and the rear connecting beam (16) that are horizontally mounted. It welds in the crowned state which covers a connection beam (16) from upper direction.

  Further, similarly, at the midway height position of the rear mast (8c), one of the rear reinforcing bars (18) made of metal square pipe material is horizontally inserted and welded horizontally, and in the vicinity of both left and right end portions thereof. From the side, a pair of side support plates (19) for the rear seedling storage tray in parallel are vertically suspended integrally. (20) is a pair of left and right transmission case mounting base plates welded from the side to the rear mast (8c), and (21) is also integrally projected outward from the vicinity of the lower end of the rear mast (8c). It is a pair of left and right horizontal drive wheel support shafts.

  Next, the seat (S) is in the form of a chair provided with not only the substantially horizontal seat surface (22) of the cushion material but also the backrest surface (23). On the lower surface of the main body frame (24) bent from the material, a leg frame (26) having a size corresponding to a certain interval of the vehicle body (F) is provided via a pair of left and right receiving pillows (25) as shown in FIG. ) Is pre-fixed horizontally by welding.

  In addition, the leg frame (26) attached to the seat (S) is a gate character in front view with the seat (S) at the center from the same metal square pipe material as the side frames (8) of the vehicle body (F). A fixed angle (β) between the pair of left and right parallel side mounting pieces (26y) that are bent into a mold and obliquely downward at both ends of the cut and the seat surface (22) is defined by both side frames (8 ) And the inclination angle (α) of the front seat seat (9f) and the rear seat seat (9r) (about 65 degrees as exemplified above).

  In addition, the both side mounting pieces (26y) of the leg frame (26) have bolt receiving holes (10f) that selectively communicate with the bolt receiving holes (10) of the seat receiving seats (9f) (9r). 27) are distributed as one set of at least two of them, and a set bolt (28) inserted and removably inserted therethrough and a fixing nut (29) thereof, the leg frame of the seat (S) ( 26) is fastened and integrated to both side frames (8) of the vehicle body (F) so as to straddle the heel (G).

  Therefore, the seat (S) can be attached to the front seat receiving seat (9f) of both side frames (8) forming the vehicle body (F) as shown in FIGS. It can also be removed and attached to the rear seat seats (9r) of both side frames (8) in the reverse direction as shown in FIGS. 5 and 6, and the seats (S) can be used interchangeably.

  In any of the mounting and use states, the posture (mounting angle) of the seat (S) is ensured to be the same, and there is no possibility that the worker (M) will feel uncomfortable. In this case, as described above, the footrest plate (12) can also be used, and the mounting position of the seat (S) can be adjusted in the vertical direction and the front-rear direction by replacing the set bolt (28). is there.

  The seat (S) corresponds to the front seat receiving seat (9f) and the rear seat receiving seat (9r) that are suspended in parallel at about 90 degrees from the floor (8a) of the both side frames (8). Both side mounting pieces (26y) of the leg frame (26) attached to the body are suspended, and the same set bolt (28) is replaced with the pair of left and right front seat seats (9f) and rear seat seat seats (9r). Thus, the seat (S) may be attached so that only the vertical adjustment can be performed.

  The prior steerable wheels (casters) (1) will be described in detail. The pair of left and right wheels are respectively connected to both ends of a horizontal front connection beam (13) that frame the vehicle body (F). (30) is pivotally pivoted freely through it, and therefore adapts itself to the bending ridge (G) and rolls smoothly on both side grooves of the ridge (G); Become.

  That is, as is apparent from FIGS. 11 and 12 extracted and shown, two parallel connecting front beams (13) are stretched by a certain length from both side frames (8) of the vehicle body (F). A pair of circular bases (31) are fastened and integrated by a plurality of bolts (32) and fixing nuts (33) from the lower side at both left and right ends, and the center of the base (31). The swivel shaft (30) hangs down integrally from the portion.

  (34) is a cylindrical bearing case surrounding the swivel shaft (30), which is welded to the center of the upper end of the bifurcated fork (35) that pivotally supports the steerable wheel (1). The ball swivels around the vertical axis of the swivel shaft (30) via a ball bearing (36) in the bearing case (34). (37) is a cover plate of the bearing case (34), and (38) is a retaining nut for fixing it, and is fastened and integrated with a lower end screw shaft portion of the swivel shaft (30).

  Furthermore, the swivel shaft (30) of the steerable wheel (1) and the seat (S) used for attachment to the front seat receiving seat (9f) of the both side frames (8) are a fixed distance (L). Therefore, the weight of the operator (M) who sits backward on the seat (S) does not act as a load on the steerable wheel (1), and the steerable wheel (1 ) There is no risk of resistance to smooth steering.

  However, a separate steering angle restricting plate (39) straddling and engaging the bifurcated fork (35) of the steerable wheel (1) is fixed to the lower surface of the base plate (31) with its bolt (32). The nut (33) is also attached and integrated so that the steerable wheel (1) does not swing freely as much as 360 degrees and is limited to a certain angular range (γ) (for example, about 30 degrees). It is regulated so that it can swing. Therefore, there is no risk of turning in an illegal lateral direction. (40) shows a mud drop scraper that is inserted and fixed at the mid-height position of the bifurcated fork (35).

  As for the leading idler roller (3), each of them is a hard synthetic resin core cylinder (42) that idles around the inclined spindle (41), and is integrally attached to the body surface. Is formed into an overall cylinder type, preferably a spindle type that is easy to be in close contact with the ridge (G), and the coating (43) covers the ridge (G). The multi-film (transparent vinyl sheet) (44) is in elastic contact with both side surfaces so as not to damage the film (44).

  The suspension hanger (14) suspended from the front nose (8b) of both side frames (8) forming the vehicle body (F) has a pair of left and right leading idler roller mounting brackets ( 45) are inserted and fitted so as to freely move up and down, and their mounting height can be adjusted and fixed by a set bolt (press bolt) (46).

  (47) is a pair of left and right support bars for the guide idler roller horizontally mounted, and is made of a channel groove type steel material of a certain length, and at one end portion on the inside thereof, the guide idler roller (3) The projecting upper end portion of the inclined support shaft (41) is welded. At that time, as is apparent from FIG. 1, the pair of left and right leading rolling rollers (3) are in an inclined posture state facing each other as a C-shape in front view across the ridge (G).

  In addition, a large number of bolt receiving holes (48) are distributed in the horizontal support bar (47) that extends for a certain length, and two set bolts that are inserted and penetrated removably here. The support bar (47) is fastened and integrated to the mounting bracket (45) via (49) and a fixing nut (50).

  That is, the support bar (47) of the leading idle roller (3) is adjusted in the horizontal direction by replacing the set bolt (49). Therefore, the leading idle roller (3 ) And the left and right pair form a C-shape in front view, and can cope with wide and narrow changes in the width (w), and both leading idler rollers (3) are connected to both sides of the multi-film (44). It can be rolled stably and smoothly along the surface at all times.

  Furthermore, the front wheel facing the position immediately after the leading idler roller (3) can swing as a steerable wheel (caster) (1) around its swivel shaft (30). Therefore, even if the heel (G) is bent, the steerable wheel (1) will follow the guiding idler roller (3) that is in contact with the heel (G). It is possible to always move forward smoothly and smoothly along the bending ridge (G).

  Next, the rotational drive mechanism of the drive wheel (2) will be described in detail. A pair of left and right battery receiving frame bases (17) are installed on the rear mast (8c) of both side frames (8) in the vehicle body (F). As described above, the horizontal transmission shaft (51) is horizontally mounted in a rotatable bearing state between the left and right sides of both battery receiving frame bases (17).

  Moreover, a first transmission sprocket (52) having a relatively large diameter is provided in the middle of the transmission shaft (51), and a pair of left and right small diameters is provided near both ends of the transmission shaft (51). The second transmission sprockets (53) are respectively fitted and integrated.

  The DC motor (24V) (4) of the drive source mentioned above is provided with a speed reducer (not shown) and is located at a rear position substantially corresponding to the first transmission sprocket (52) on the transmission shaft (51). The first transmission chain (55) is wound between the front and rear of the output sprocket (54) of the motor (4) and the first transmission sprocket (52) facing each other.

  (56) is a cover plate having a cross-sectional gate shape that safely covers the transmission shaft (51), the DC motor (4), and the first transmission chain (55), and the right and left sides of the battery receiving frame base (17). It is fixed horizontally between each other. (57) is a battery storage box mounted and fixed on both the battery receiving frame bases (17), in which the batteries (12V × 2) (5) are stored. This can be charged using a general household power supply (100V).

  On the other hand, a relatively small third transmission sprocket (58) corresponding to the second transmission sprocket (53) on the transmission shaft (51) is connected to the drive wheel (2) via a common boss (59). The bosses (59) are respectively secured to the horizontal drive wheel support shaft (21) projecting from the rear mast (8c) of the both side frames (8). It is inserted and fitted.

  (60) is a pair of left and right second transmission chains wound between the upper and lower surfaces of the second and third transmission sprockets (53) and (58), both of which are attached to the rear mast (8c) for the transmission case. It is kept in a safe covering state by a transmission case (61) that is integrally attached to the base plate (20).

  In this case, as is apparent from the side sectional view of FIG. 4, an imaginary line (Z−) that linearly connects the support shaft (21) forming the rotational axis of the drive wheel (2) and the transmission shaft (51). Z) is an inclined line that intersects with the rear mast (8c) where the both side frames (8) are suspended by a certain angle (θ) (for example, about 5 degrees), and the left and right pair of the battery storage box (57) is rearward. It is arranged in the retracted state.

  Therefore, the weight of the battery (5) does not act as a load concentrated from directly above the drive wheel (2) and does not give resistance to its rotational drive, It can be done extremely lightly by the center of gravity of the rear part.

  Furthermore, a pair of left and right side pull clutches (62) are also attached to both ends of the transmission shaft (51), and a detailed mechanism in which the left and right side pulls act independently is not shown, but the knob (63) Is pulled from the lateral outer side of the battery receiving frame base (17) to cut off the transmission between the left or right side of the second transmission sprocket (53) and the transmission shaft (51), and the remaining drive By turning only the wheel (2) and turning the vehicle body (F) in the desired direction, the planting work (G) can be changed quickly and lightly on the headland. ing. Reference numeral (64) denotes a handle grip for lifting the front portion of the vehicle body (F) when turning, and is integrally attached to the front end portions of the front noses (8b) of the both side frames (8).

  Reference numeral (65) is a control box which is attached and fixed to the left or right front surface of the battery receiving frame base (17) so that it can be easily operated from above the seat (S). 66), a traveling speed adjustment dial (67) and a display lamp (68) are arranged in parallel. (69) is a foot accelerator pedal that is detachably attached to either the left or right (preferably the right) of the footrest plate (12). This is when the orientation of the seat (S) is changed and used. The other footrest plate (12) is replaced.

  In addition, a separate hand switch (70) for turning on / off the power is installed on the hand switch mounting seat (15) attached to the front nose (8b) of the side frame (8). When M) lifts the front of the vehicle body (F) and turns, it can be conveniently operated from the hand. The overall electrical wiring from the battery (5) is not shown.

  Further, the front seedling storage tray (6) is made of synthetic resin netting, and is mounted on the two horizontal front connecting beams (13) that frame the vehicle body (F). A plurality of bolts (71) are attached and fixed stably from above. Therefore, the worker (M) who sits on the seat (S) attached and used forward can quickly and easily grasp the vegetable seedling (V) from the front seedling storage tray (6).

  In the case where a commercially available small net cage is used as the front seedling containing tray (6), as suggested in the plan view of FIG. It is desirable to determine so as to accommodate a large amount of vegetable seedling (V) that is not deficient during work.

  On the other hand, as for the rear seedling containing tray (7), it is composed of a pair of front and rear synthetic resin nets (7f) (7r) as shown in FIG. The left and right side surfaces of (7r) are respectively horizontal to the pair of left and right rear seedling storage tray side support plates (19) that are suspended from the rear reinforcing bars (18) of the side frames (8). It is pivotally mounted in an undulating manner via a fulcrum pin (72). (73) is a pair of left and right set bolts for adjusting the forward downward inclination angle of the rear mesh rod (7r), but nuts for tightening and fixing the bolts are not shown.

  Then, the small front mesh bar (7f) at the front end of the rear mesh bar (7r) has its own undulating rotation (refraction) by a pair of horizontal left and right assembly bolts (74). It is pivotally connected freely. The nut that adjusts and fixes the front lower inclination angle of the front mesh rod (7f) by tightening the assembly bolt (74) is not shown.

  For this reason, the worker (M) who sits on the seat (S) that is attached to be used in the rearward direction can quickly and easily relieve the vegetable seedling (V) from the rear seedling storage tray (7) that faces the position in front of the eyes. You can grab it. Also, the seat support elbows of the side frames (8) forming the vehicle body (F) by refracting the front mesh basket (7f) of the rear seedling containing tray (7) with respect to the rear mesh basket (7r). (8d), leaving the seat (S) forward to the rear seat receiving seat (9r) of the seat support elbow (8d) without any trouble It can also be attached to a stable cage.

  (75) is a seedling box which is fixedly mounted horizontally between the left and right sides of both battery storage boxes (57) at a position directly above the cover plate (56) covering the transmission shaft (51) and the DC motor (4). It is a cradle, and a separate seedling box (76) containing a spare vegetable seedling (V) is mounted and used from above.

  Therefore, by transferring the spare vegetable seedling (V) from the seedling box (76) to the front seedling storage tray (6) and the rear seedling storage tray (7) as appropriate, the straw (G) in a vast field In addition, the planting operation can be performed efficiently without the shortage of the vegetable seedling (V). (77) shows a mounting bolt of the seedling box cradle (75) with respect to the battery storage box (57).

  When the self-propelled work carriage of the present invention configured as described above is carried into the field and planted with vegetable seedlings (V) such as sweet potatoes, potatoes, taros, etc. If (M) is related to the predetermined advance (advance) direction (A) in the work cart, and if the user prefers or is good at working in a backward posture, the above-described process is performed as shown in FIGS. A rear seedling storage tray (facing to the front of the eye) with the seat (S) attached to the front seat seat (9f) of both side frames (8) forming the vehicle body (F) facing backward. 7) The vegetable seedling (V) is stored in the front seedling storage tray (6) which is also located behind the seedling box (76) and the worker (M). Keep it.

  The left and right pairs of the leading idler roller (3), the steerable wheel (caster) (1), and the drive wheel (2) of the vehicle body (F) are arranged in a state of straddling the heel (G). In addition, one worker (M) sits backward on the seat (S) and advances (moves forward) the work cart in one direction indicated by an arrow (A) in FIG.

  In addition, it is preferable to adjust the speed to about 300 to 400 m / h in view of the time and effort required to separate the vegetable seedlings (V) that are uneven in terms of travel speed, and within that limit the foot accelerator pedal (69) While stepping on with one foot, the vegetable seedling (V) picked up from the rear seedling storage tray (7) in front of the eye is planted on the heel (G).

  Then, the worker (M) who puts both feet on the footrest plates (12) of both side frames (8) is placed on the upper surface of the heel (G) in a posture state where the heel (G) is straddled. Because it approaches, it can be planted in order with little effort without being bent over forcibly, and the rotational drive source of the drive wheel (2) is a DC motor (4), so it differs from the engine. The work can be performed silently without any noise remaining in the ear of the worker (M).

  Moreover, the weight of the operator (M) sitting on the seat (S) does not act as a load on the steerable wheel (1), and the steerable performance of the universal wheel (1) In the forward position, the work carriage moves forward correctly by the leading action of the leading idler roller (3) that touches and rolls on the left and right side surfaces of the multi-film (44) with the heel (G) sandwiched between them. Therefore, the operator (M) can concentrate on the planting work with peace of mind, and if he / she wants to stop in the middle of the work, it is only necessary to release the stepping operation of the foot accelerator pedal (69) each time. .

  Eventually, when the planting work for the row of ridges (G) is completed and the headland arrives, the worker (M) who gets off the seat (S) moves the hand switch (70) and the side pull clutch (62). In addition to the operation, the front part of the vehicle body (F) is higher than the heel height (h) and is lifted as shown in FIG. 14 to keep one of the left and right drive wheels (2) in a free state. Then, the row of the rods (G) to be planted continuously may be changed by turning the vehicle body (F) slightly while turning the remaining driving wheel (2) to be driven to rotate as a fulcrum.

  The front part of the vehicle body (F) is significantly lighter than the rear part of the seat (S) on which the pair of left and right batteries (5), the DC motor (4), the spare seedling box (76), etc. are mounted. Therefore, the above-described lifting and turning operation of the front part can be performed quickly and easily even by one of the elderly and women.

  When sitting on the seat (S) as shown in FIG. 13 in a backward posture, it can be said that there is an advantage that the operator (M) can visually check the planting state of the vegetable seedling (V). On the other hand, if M) prefers to work in a forward-facing position, he / she detaches the seat (S) from the front seat seats (9f) of both side frames (8), and removes the same on both sides. It is attached to the rear seat receiving seat (9r) of the frame (8) so as to face forward as shown in FIGS.

  Then, as is apparent from FIGS. 15 and 16, the front seedling storage tray (6) faces the position in front of the operator (M), so that the vegetable seedling (V) can be easily grasped from now on. Even in that case, the footrest plate (12) of both side frames (8) is also used as a dual purpose, and the worker (M) who puts both feet on this side is also in a posture state straddling himself / herself (G). In order to approach the upper surface of the ridge (G), the planting operation can be carried out easily and lightly as in FIG.

  In addition, it cannot be overemphasized that it can convert into the backward installation use state like FIGS. 1-4 and FIG. 13 conversely from the front installation use state of a seat (S) like FIG.5, 6, FIG.15,16. Other operations and effects are also the same as those described with reference to FIGS. For example, accessories such as an awning or a rain shield may be attached to the vehicle body (F).

It is a front view of the self-propelled work cart according to the present invention. It is a side view of FIG. FIG. 3 is a plan view of FIG. 2. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a top view of the use condition which attached the seat to the back seat seat of the vehicle body forward. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a front view which extracts and shows a vehicle body. FIG. 8 is a side view of FIG. 7. It is a top view of FIG. It is a slope view which extracts and shows a seat. It is an expanded sectional view which follows the 11-11 line of FIG. 12 is a sectional view taken along line 12-12 of FIG. It is a sectional side view which shows the seedling planting operation in the use condition which attached the seat to the front seat seat of the vehicle body in the rearward direction. It is a side view which shows the front part lifting operation of a work trolley. It is a front view which shows the seedling planting operation | work in the use condition which attached the seat to the back seat seat of the vehicle body forward. FIG. 16 is a side sectional view of FIG. 15.

Explanation of symbols

(1) · Steerable wheel (2) · Drive wheel (3) · Leading idler roller (4) · DC motor (5) · Battery (6) (7) · Seedling storage tray (7f) · Front net (7r) ・ Rear net (8) ・ Side frame (8a) ・ Floor (8b) ・ Front nose (8c) ・ Rear mast (8d) ・ Seat support elbow (9f) ・ Front seat seat (9r) ・ Rear Side seat support (11), mud drop hole (12), footrest plate (13), front connection beam (16), rear connection beam (17), battery support frame (18), rear reinforcement bar (19)・ Side support plate for rear seedling storage tray (21) ・ Support shaft for driving wheel (22) ・ Seat surface (23) ・ Backrest surface (24) ・ Seat body frame (26) ・ Leg frame (26y) ・ Side Mounting piece (30), swivel shaft (31), Panel (34), Bearing case (39), Steering angle regulating plate (40), Inclined spindle (32), Core cylinder (43), Elastic coating (44), Multi film (51), Transmission shaft (52 ) ・ 1st transmission sprocket (53) ・ 2nd transmission sprocket (54) ・ Output sprocket (55) ・ 1st transmission chain (57) ・ Battery storage box (58) ・ 3rd transmission sprocket (60) ・ 2nd transmission Chain (61), Transmission case (62), Side pull clutch (64), Handle grip (65), Control box (69), Foot accelerator pedal (70), Hand switch (72), Support pin (73), Set bolt (74) · Assembly bolt (75) · Seed box cradle (76) · Seed box (A) · Forward travel direction (F) · Body (G) · 畝 (L) · Constant distance (S) · Seat (α) · Constant crossover (tilt) angle (β) · Constant crossover angle (γ) · Steering angle range

Claims (9)

A rigid vehicle body (F) in a frame-fixed state that maintains a constant interval substantially corresponding to the ridge width (w) of the field, a pair of left and right steerable wheels (1) that support the front, and the vehicle body (F) A pair of left and right drive wheels (2) that support the rear portion, a DC motor (4) and a battery (5) that rotationally drive the drive wheels (2), and a steerable wheel (1) of the vehicle body (F) A pair of left and right leading idler rollers (3) that are pivotally supported in front of and in contact with both sides of the heel (G), and are attached to the front and rear of the vehicle body (F). A self-propelled working cart for planting seedlings that travels forward in one direction (A), comprising a pair of seedling storage trays (6) and (7),
A pair of left and right parallel side frames (8) extending along the front-rear direction of the vehicle body (F) has a substantially horizontal floor between the front and rear wheels (1) and the drive wheels (2). As (8a), while shaping into a substantially U-shaped side view that sinks lower than the heel height (h),
The front side of both side frames (8) protruding from the floor (8a) is the front seat receiving seat (9f), and the rear side of both side frames (8) facing this is the rear seat receiving seat (9r). The two seats (9f) and (9r) are kept at a constant crossing angle (α) substantially equal to the floor (8a),
A seat for one person (S) is used interchangeably between the rear facing to the front seat receiving seat (9f) and the front facing to the rear seat receiving seat (9r), and each seat receiving seat (9f) (9r) is detachably attached and fixed, so that the worker (M) who sits on the seat (S) is set to be in a posture state straddling the heel (G) in any case. A self-propelled work cart for planting seedlings. The both side frames (8) of the vehicle body (F) are shaped into a substantially inverted H-shape that expands upward in a side view when the floor (8a) is the bottom side,
The front seat seats (9f) on the front sides of the side frames (8) and the rear seat seats (9r) on the rear sides facing the front frames are almost equal to each other crossing the floor (8a). While maintaining a constant inclination angle (α),
2. The seat (S) according to claim 1, wherein the seat (S) is mounted so as to be adjustable in the vertical direction and the front-rear direction along each seat receiving seat (9f) (9r) of the constant inclination angle (α). A self-propelled working cart for planting seedlings. While welding the footrest plate (12) in which a large number of mud dropping holes (11) are distributed to the floor (8a) of both side frames (8),
3. A self-propelled work for planting seedlings according to claim 1 or 2, wherein a foot accelerator pedal (69) is attached to either one of the left and right sides of the footrest plate (12) so as to be freely changeable to the other one. Trolley. The seat (S) is in the form of a chair composed of a substantially horizontal seat surface (22) and a backrest surface (23). )
A fixed angle (β) at which the left and right side mounting pieces (26y) parallel to the leg frame (26) and the seat surface (22) cross each other is received at the front seat of the side frames (8) in the vehicle body (F). 3. The self-propelled planting for planting seedlings according to claim 1 or 2, characterized in that the seat (9f) and the rear seat receiving seat (9r) correspond substantially equally to a certain angle (α) intersecting the floor (8a). Work cart. Two front connection beams (13) parallel to the front part of both side frames (8) are fixed horizontally and fixed horizontally, and the seedling storage tray (6) is detachably attached to both front connection beams (13) from above. And attached to
The steerable wheels (1) are moved through a swivel shaft (30) at both left and right ends where both front connecting beams (13) project laterally from both side frames (8) by a certain length. 2. The self-propelled working cart for planting seedlings according to claim 1, wherein each is pivotally mounted so as to be able to swivel only by [gamma]). A front nose (8b) that continuously protrudes from the floor (8a) at the front portions of both side frames (8), and a pair of left and right leading idler roller suspension hangers from the front end portions of both front noses (8b) (14) is integrally suspended and
A pair of left and right leading idler rollers (3) are pivotally supported on both suspension hangers (14) so as to be inclined to face a substantially C shape when viewed from the front, and are adjustable in the vertical and horizontal directions. The self-propelled work cart for planting seedlings according to claim 1. Horizontal rear reinforcement bars (18) fixed to the middle height position of both rear masts (8c) as rear masts (8c) continuously standing from the floor (8a) at the rear of both side frames (8) From the left and right pair of seedling storage tray side support plate (19) is integrally suspended,
2. A self-propelled working cart for planting seedlings according to claim 1, wherein the seedling storage trays (7) are pivotally attached to both side support plates (19) so as to freely adjust the undulating rotation angle. The rear parts of both side frames (8) are rear masts (8c) that continuously stand up from the floor (8a), and the upper ends of the side frames (8) are horizontally paired onto two rear connecting beams (16) that are fixed and horizontally mounted. With a battery stand (17)
A first transmission sprocket (52) and a pair of left and right second transmission sprockets (53) are placed on a horizontal transmission shaft (51) that lies horizontally between the left and right sides of both battery receiving frames (17). Fit in parallel and integrate,
While connecting the first transmission sprocket (52) and the output sprocket (54) of the DC motor (4) by the first transmission chain (55),
A pair of left and right third transmission sprockets (58) pivotally supported at the lower end of the rear mast (8c) so as to rotate integrally with the drive wheel (2) and the second transmission sprocket (53) are respectively connected to the second mast sprocket (53). The self-propelled work cart for planting seedlings according to claim 1, wherein the carts are connected by a transmission chain (60).   A pair of side-pull clutches (62) acting independently on the left and right sides are attached to both ends of the transmission shaft (51), and the clutch (62) is pulled from the laterally outer side, so that either the left or right side of the drive wheel (2) 9. The self-propelled working cart for planting seedlings according to claim 8, wherein one is kept free and only the other is rotationally driven.

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