JP2006217853A - Traveling-type power spreader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traveling-type power spreader traveling in a field without damaging paddy rice, capable of carrying out spreading operation of a granular or liquid material to be spread such as agrochemical and fertilizer while traveling on levees or ridges, and capable of entering a neighboring field by climbing over the levee or the ridge. <P>SOLUTION: The traveling-type power spreader is constituted as follows. A body frame 12 supported by a right and left pair of crawler traveling devices 11L and 11R is formed into a portal shape to enable the traveling while spanning the paddy rice P, and the traveling while grounding both crawler traveling devices 11L and 11R on the top surfaces of the levees and the ridges G1. The crawler traveling devices 11L and 11R are constituted so as to be vertically turnable by centering driving sprockets 15 of both the crawler traveling devices 11L and 11R as turning centers to facilitate the climbing over operation of the levee and ridge G1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a traveling power spreader that performs a dusting or liquid spraying operation of agricultural chemicals, fertilizers, seeds and the like while traveling in a farm or on a shore.

  As power spreaders used for paddy field control, fertilization, etc., a backpack type is generally used. However, this shoulder-type power spreader is considerably heavy only in the body parts such as a storage tank, a blower, and a prime mover, and in addition, the weight of sprayed materials such as agricultural chemicals, fertilizers, and seeds stored in the storage tank. Therefore, it was extremely hard work to carry out the spraying work while walking on the shore of bad anchorage and the field with the power spreader on the back.

  Therefore, on the airframe (base) frame having a swinging support shaft extending in the front-rear direction, the front free wheel and the driving rear wheel, which are main wheels, are arranged in a straight line in the front-rear direction, and a pair of left and right maneuvers at the rear of the airframe frame A handle is provided, and a swing frame is supported on the swing support shaft so as to be swingable up and down. A storage tank in which scattered matter is stored in the swing frame, and a power sprayer that sprays the scattered matter in the storage tank. By mounting a motor and a prime mover that also serves as a driving source and a power source for a traveling system, and by arranging a side wheel on one side (one side) on the left and right sides (one side) of the swinging frame, Even when traveling on rough terrain, etc., the swinging of the steering handle in the left-right direction is suppressed as much as possible to improve posture stability and traveling stability, and the dispersion of scattered matter by the power spreader is reduced. By wheel traveling device configured as shown Traveling power spreader is known (for example, see Patent Document 1.).

A first hopper that supports a machine frame on the crawler traveling device, and temporarily stores field material formed by mixing chemical fertilizer, agricultural chemicals, seeds, and the like with compost in the machine frame, and the inside of the first hopper Second hopper to which a fixed amount of field material is supplied via a bucket conveyor, a molding device and a guide rod for forming the fixed amount of supplied field material to a certain length, and a field material molded to a certain length There is known a traveling power spreader equipped with an air conveying device that sucks and discharges the air from a spray tube, and a prime mover that also serves as a drive source of these devices and a power source of a traveling system (for example, see Patent Document 2). .)
Japanese Patent Laid-Open No. 10-244188 (page 2-3, FIGS. 1 to 3) Japanese Patent Laid-Open No. 10-4720 (page 3-4, FIG. 3)

  In the traveling power spreader provided with the wheel traveling device of Patent Document 1 described above, when traveling on a shore that is usually formed in a width of 40 cm, a storage tank for storing scattered matter mounted on a swing frame, , Using the weight of a power spreader that spreads this spatter, and trying to stabilize the posture while pressing the side car against the upper side of the shore, It has been difficult to travel in a stable body posture on a shore that is soft and uneven in width, while suppressing swaying in the direction. Furthermore, it was extremely difficult to get over the shore of the ridge of about 40 cm with this traveling power spreader and enter the adjacent farm field because the body frame rides on the shore. In addition, when the traveling power spreader is run in the field, and the control work of paddy rice grown at a height of 60 to 70 cm is performed, a curved pipe or the like constituting the base end of the storage tank or the tubular spreader, etc. Had a problem that the rice was in contact with the rice and damaged.

  On the other hand, the traveling power spreader provided with the crawler traveling device of Patent Document 2 can travel in a stable posture in the field, but this traveling power spreader gets over the ridge of about 40 cm in height. When trying to enter the adjacent farm field, it was difficult for the front side (idler side) of the crawler traveling device to enter the shore and get over the shore. Similarly to the traveling power spreader equipped with the wheel traveling device of Patent Document 1, when attempting to control paddy rice grown at a height of 60 to 70 cm while traveling in the field, the body frame and the body frame However, it was not sufficient because the components of the power spreader mounted on the paddy rice were in contact with the paddy rice and the paddy rice was damaged.

  The present invention aims to solve the above-mentioned problems, and includes a pair of left and right crawler traveling devices in which a crawler is wound around an idler and a drive sprocket, and a body frame that supports both crawler traveling devices, In the traveling power spreader having a power spreader and a traveling prime mover mounted on the body frame and provided with a steering handle, the crawler traveling device is supported on the body frame so as to be swingable up and down. It is said.

  A second feature is that the crawler travel device is provided with switching operation means capable of switching between a vertically swingable state and a fixed posture state.

  In addition, the apparatus includes a pair of left and right crawler traveling devices in which a crawler is wound around an idler and a drive sprocket, and a body frame that supports both crawler traveling devices, and a power spreader and a driving prime mover are mounted on the body frame. In a traveling power spreader equipped with a steering handle, the body frame is formed in a gate shape so that it can travel across rice in the field, and both crawler traveling devices are grounded on the upper surface of the shore. The third feature is that the vehicle can be driven on the shore in the above state.

  According to the first aspect of the present invention, the pair of left and right crawler traveling devices formed by winding the crawler around the idler and the drive sprocket are supported on the body frame, and the power spreader and the traveling prime mover are mounted on the body frame. In the traveling power spreader having a steering handle, the crawler traveling device is supported by the body frame so as to be able to swing up and down, so that the crawler traveling device moves over the shore and enters the adjacent field. Since it swings upward along the inclined surface of the ridge, climbing up to this inclined surface starts smoothly. Furthermore, the steering handle can be gripped without a large movement of the center of gravity of the aircraft, and the work of getting over the shore in a stable aircraft posture can be performed.

  According to the second aspect of the present invention, since the crawler traveling device is provided with switching operation means capable of switching between the vertically swingable state and the fixed posture state, the crawler traveling device is provided for the above-mentioned work on the shore. When carrying out the spraying operation of powdery or liquid sprayed materials such as agricultural chemicals, fertilizers, seeds, etc. while traveling in the field, the crawler traveling device is set to the attitude of the crawler traveling device with respect to the body frame by the switching operation means. Therefore, it is possible to easily switch to and maintain a fixed posture state, and it is possible to perform stable spraying work and improve workability.

  According to a third aspect of the present invention, a pair of left and right crawler traveling devices, in which a crawler is wound around an idler and a drive sprocket, are supported on a body frame, and a power spreader and a prime mover for traveling are mounted on the body frame. In addition, in the traveling power spreader equipped with a steering handle, the body frame is formed in a gate shape so that traveling across the rice is possible in the field, and both crawler traveling devices are provided on the upper surface of the shoreline. By making it possible to run on the shore in a grounded state, it is possible to perform control work by the traveling power spreader across the land without damaging paddy rice grown to a height of 60 to 70 cm, and While traveling with a pair of left and right crawler traveling devices on the shore top surface, it is possible to perform spraying work in a stable aircraft posture, reducing scattering unevenness and improving spraying performance That.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a traveling power spreader, and FIG. 2 is a plan view. The traveling power spreader 10 includes a pair of left and right crawler traveling devices 11L and 11R arranged along a traveling direction. In addition, a machine body frame 12 that supports the crawler traveling devices 11L and 11R is provided.

  A pair of left and right chain cases 13L and 13R that constitute the column portion of the machine body frame 12 is provided, and a drive sprocket 15 for driving the crawler travel devices 11L and 11R is fixed to the output shaft 14 below the chain cases 13L and 13R. The traveling frame 16 constituting the crawler traveling devices 11L and 11R is rotatably supported on the output shaft 14, and the traveling frame 16 includes a roller 17 and an idler 19 for adjusting the tension of the traveling crawler 18. The crawler guide 21 for preventing the traveling crawler 18 from coming off is provided, and the traveling crawler 18 is wound around the idler 19, the roller 17, and the drive sprocket 15.

  With the above-described configuration, the pair of left and right crawler travel devices 11L and 11R are supported so as to be able to swing up and down as indicated by an arrow B in the figure with the output shaft 14 below the chain cases 13L and 13R, that is, the drive sprocket 15, as the rotation center. By moving the crawler travel devices 11L and 11R up and down, as will be described in detail later, it is possible to easily carry out a moving operation for getting over the shore and entering the traveling power spreader 10 into the adjacent farm field. Yes.

  The left and right steering handles 22L and 22R are integrally fixed to the upper frame 23, and a pair of left and right chain cases 13L and 13R are attached to the upper frame 23 in the vicinity of the base ends of the steering handles 22L and 22R. The inner support arms 24L and 24R that support the other end of the output shaft 14 below the chain cases 13L and 13R are attached to the upper frame 23 so as to face the chain cases 13L and 13R. Screwed. That is, the upper frame 23, the pair of left and right chain cases 13L and 13R, and the inner support arms 24L and 24R constitute a strong portal-shaped body frame 12 as shown in FIG.

  In more detail, by making the body frame 12 formed in a gate shape as described above to a height that can travel across a row of paddy rice P grown at a height of 60 to 70 cm, the traveling power spreader 10 can be performed without damaging the paddy rice P during the spraying operation in the field. An appropriate pair of left and right guide bodies for smoothly guiding the leaves of the paddy rice P may be provided inside the machine body frame 12 formed in a gate shape.

  A front frame 26 that moves up and down via a pair of left and right parallel link mechanisms 25 is provided on the front side of the upper frame 23. The front frame 26 is a commercially available product that has been conventionally used for paddy field control, fertilization, and the like. A backpack-type power spreader 31 is configured to be mountable via unillustrated screwing means and fastening means, and a pair of left and right gas springs 32, 32 are interposed between the lower end of the front frame 26 and the upper frame 23. As a result, as shown in FIG. 4, the height adjustment (H1 and H2) of the upper and lower stages of the power spreader 31 with respect to the grounding portion G of the crawler traveling devices 11L and 11R can be easily performed by the vertical adjustment lever 33. I have to.

  That is, the height adjusting means Q of the power spreader 31 is configured by using the parallel link mechanism 25, the gas springs 32, 32, and the vertical adjustment lever 33, and the traveling power spreader 10 travels in the field. When the spraying operation is performed, the base end 33a of the vertical adjustment lever 33 is locked to the position (see FIG. 7) of the hook 23a provided on the upper frame 23 so that the power spreader 31 is moved to the upper position (H1). It is possible to adjust the height, and thus it is possible to travel across the paddy rice P grown at a height of 60 to 70 cm. On the other hand, as shown in FIG. 5, when performing the spraying operation while traveling with the crawler traveling devices 11L and 11R grounded on the upper surface of the shore, the base end portion 33a of the vertical adjustment lever 33 is moved to the position of the hook 23a. When locked to (see FIG. 7), the power spreader 31 can be adjusted in height to the lower position (H2), thereby enabling stable spraying work in a low center of gravity posture.

  In addition, an engine 36 having a centrifugal clutch, which is a prime mover connected to a speed reducer 35 via a bracket 34, is mounted on the rear side of the upper frame 23 and in a substantially middle portion between the left and right steering handles 22L and 22R. (Screwed).

  More specifically, the power of the engine 36 is transmitted to an intermediate transmission shaft 38 supported on the upper frame 23 via a speed reducer 35 and a chain transmission mechanism 37, and then couplings 41 provided at both shaft ends of the intermediate transmission shaft 38. , 41 are transmitted to the input shafts 42L, 42R of the pair of left and right chain cases 13L, 13R. The output shaft 14 is rotationally driven through a chain 43 in both the chain cases 13L and 13R, and the traveling crawler 18 is driven by a drive sprocket 15 fixed to the output shaft 14.

  Further, the input shaft 42R of the right chain case 13R protrudes to the outside of the chain case 13R, and an input pulley 45 is fixed to the shaft end of the input shaft 42R so that the belt transmission mechanism 53, which will be described later, is a simple and inexpensive input side. This constitutes the transmission mechanism. Then, just below the intermediate transmission shaft 38 (couplings 41, 41), the base ends (lateral pipes) 46a, 46a of the substantially U-shaped lower arm 46 in plan view constituting the parallel link mechanism 25 are connected to the upper frame 23. A pin 48 is provided at the fulcrum c (see FIG. 7) so that it can swing up and down, and protrudes through a support member 47 fixed to the right side of the base end of the front frame 26. By rotatably supporting the counter pulley 49, a belt transmission mechanism 53 including a V belt 51 wound around both pulleys 45 and 49, a tension clutch 52, and the like is configured. A plate 46b and a plate 46b are fixed to the left and right lower portions of the distal end portion of the lower arm 46, and a support member 47 that fixes both plates 46b and 46b to the right side of the base end of the front frame 26; A support member 54 fixed on the left side of the base end of the front frame 26 is connected via connection pins 55 and 55.

  On the other hand, the base ends of the left and right upper arms (plates) 56L, 56R constituting the parallel link mechanism 25 are supported by the bosses BL, BR supporting the input shafts 42L, 42R of the chain cases 13L, 13R, and the right side. The distal end portion of the upper arm 56R is inserted and supported by the pin 48 described above, while the distal end portion of the left upper arm 56L is connected to a support member 54 fixedly provided on the left side of the proximal end portion of the front frame 26 via a connecting pin 59. It is connected. That is, the parallel link mechanism 25 is formed by the left and right upper arms 56L and 56R, the lower arm 46, and the front frame 26 described above.

  As shown in FIG. 6, the right upper arm 56R rotatably supports the clutch arm 52a constituting the tension clutch 52, and screws a cover C1 that encloses the belt transmission mechanism 53 from the outside. Mounting seats a, b, and c. The belt transmission mechanism 53 is integrally provided on the right upper arm 56R constituting the parallel link mechanism 25, so that the belt transmission can be transmitted even if the shoulder-type power spreader 31 mounted on the front frame 26 is moved up and down. The power transmission of the mechanism 53 is made without any inconvenience.

  Further, a support arm (pipe) 26a extending forward is provided on the right side of the front frame 26, and an L-shaped swing link 58 in plan view that can swing in the horizontal direction at the tip of the support arm 26a. Support. A crank mechanism that swings in the front-rear direction via the swing link 58 and the rod 57 connected to the vicinity of the outer periphery of the counter pulley 49 is configured, and the spray pipe 61 of the power spreader 31 is held by the swing link 58. The swing arm 62 is connected.

  More specifically, the tension clutch 52 that connects and disconnects the belt transmission mechanism 53 described above is operated via the wire 63 on the right end side of the reinforcing pipe 22M that is provided in the vicinity of the grip portions of the left and right steering handles 22L and 22R. A tension clutch operating lever 64 is provided. Then, when the tension clutch 52 is engaged and operated via the tension clutch operating lever 64, the spray pipe 61 is connected to the spreading pipe 61 via the swing link 58, that is, the swing arm 62 constituting the crank mechanism linked to the belt transmission mechanism 53 as shown in FIG. Can be swung at a predetermined angle θ (110 °) in the horizontal direction shown in FIG.

  That is, the above-described belt transmission mechanism 53, rod 57, swing link 58, swing arm 62, and the like constitute the forced swing means S that swings the spray pipe 61 of the power spreader 31 at a predetermined angle θ in the horizontal direction. In addition, while the forcible swinging means S automatically swings the spray pipe 61, the powdered or liquid sprayed material such as agricultural chemicals, fertilizers and seeds can be efficiently spread over a wide area from the tip of the spray pipe 61. Can be sprayed. It should be noted that clamps 62a and 62a for holding the straight tube portion 61b of the spray tube 61 are provided on the distal end side of the swing arm 62 so that the bendable rubber bellows portion 61a of the spray tube 61 can be deformed without difficulty. I have.

  Further, in the case where the spraying operation is performed while the traveling power spreader 10 is traveling with the crawler traveling devices 11L and 11R being grounded on the upper surface of the shore G1, the spraying pipe 61 is not swung in one direction. The work can be performed in a fixed state. That is, in a state where the tension clutch lever 64 is turned off, the pin hole is set so that the spray pipe 61, that is, the swing arm 62 can be pin-fixed by selecting one of the predetermined positions D or E shown in FIG. A bifurcated plate 65 having 65d and 65e is provided at the tip of the support arm 26a.

  Further, when performing the spraying work around the shore G1, the spraying range adjusting means F is provided which can adjust the spraying range by adjusting the vertical height of the spraying pipe 61 so as to avoid unnecessary overlapping spraying. That is, the swing arm 62 is connected to the swing link 58 so as to be rotatable up and down, and the swing arm is adjusted up and down provided on the inner side of the compression spring 66 and the tension clutch operating lever 64 that urges the spray pipe 61 in the upward direction. The lever 67, the multistage notched lever guide 68, the linkage wire 69, and the like constitute the spraying range adjusting means F. The vertical height can be adjusted. It should be noted that a simple height adjusting means for the swing arm 62 may be configured by a vertical hole 58a (see FIG. 6) at a portion where the swing arm 62 is connected to the swing link 58 so as to be swingable up and down.

  Further, the traveling power spreader 10 supports the crawler traveling devices 11L and 11R so that the crawler traveling devices 11L and 11R can swing up and down around the drive sprocket 15 that drives the crawler traveling devices 11L and 11R. 11R is provided with switching operation means K capable of switching between a vertically swingable state and a fixed posture state, and the configuration of the switching operation means K will be described below.

  As shown in FIGS. 3, 5, and 7, a pin 71 projects from the inside of the traveling frame 16 corresponding to a substantially intermediate portion between the drive sprocket 15 and the idler 19. A pair of left and right rods 72, 72 having a boss 72 a to be attached are attached facing upward, and a vertical pipe 73 a constituting a T-shaped pipe body 73 is inserted into the upper part of both rods 72, 72 in a side view. The boss 73b fixed in the horizontal direction of the vertical pipe 73a is attached to the upper frame 23 constituting the body frame 12 via a pin 74.

  Further, a lock pin 75 that is constantly urged in the axial direction of the rod 72 by a compression spring 74 is inserted into a horizontal pipe 73 c that is orthogonal to the vertical pipe 73 a that constitutes the T-shaped pipe body 73. Then, one end (measure end fitting) of the left and right wires 76L and 76R is connected to a portion where the lock pin 75 protrudes from the horizontal pipe 73c, and the other end (measure end fitting) of both the wires 76L and 76R is connected to the left steering handle. 22 is integrally connected to a lock release lever 77 provided on the gripping portion of 22, and is fitted to the lock release lever 77, both wires 76 L and 76 R, a T-shaped pipe body 73, and the T-shaped pipe body 73. The switching operation means K described above is constituted by the pin 74 to be inserted, the pair of left and right rods 72, 72, and the like.

  More specifically, the rod 72 is provided with two upper and lower notches 72b and 72c that are locked by the lock pin 75, and a stopper member 78 that regulates the upward swing of the crawler traveling devices 11L and 11R. When the power spreader 10 travels on the road or while traveling in the field, the crawler is moved by locking the lock pin 75 to the upper notch 72b of the rod 72 as shown by the solid line in FIG. Normal traveling in a stable fixed posture in which the grounding portion G of the traveling crawler 18 wound around the traveling devices 11L and 11R, that is, the driving sprocket 15 and the idler 19, is substantially parallel to the left and right steering handles 22L and 22R. Is possible.

  On the other hand, when going over the ridge G1 having a height of about 40 cm and entering the adjacent farm field, the right and left rods 72, 72 are connected via the left and right wires 76L, 76R by grasping the lock release lever 77. The lock pin 75 locked to the upper notch 72b is released. As a result, the crawler travel devices 11L and 11R can swing up and down as shown by the arrow B in the drawing with the drive sprocket 15 as the center of rotation. The state of the crawler travel devices 11L and 11R indicated by the two-dot chain line is the upper limit swing state in which the stopper member 78 provided on the rod 72 is in contact with the lower end of the vertical pipe 73a constituting the T-shaped pipe body 73. Is shown.

  Then, with the lock release lever 77 held as described above and the crawler travel devices 11L and 11R being able to swing up and down, the operator M holds the left and right steering handles 22L and 22R as shown in FIG. However, when the traveling power spreader 10 is caused to travel so as to be substantially orthogonal to the shore G1, the crawler traveling devices 11L and 11R swing upward along the inclined surface of the shore G1, and travel accordingly. Since the ground contact portion G of the crawler 18 contacts the inclined surface, smooth climbing is started. At this time, since the crawler traveling devices 11L and 11R swing up and down independently from each other, smooth climbing is possible even if there are some irregularities on the inclined surface of the shore G1.

  Next, as shown in FIG. 9, when the traveling power spreader 10 has fully climbed to the upper surface (upper part) of the shore G1, the operator M releases his / her hand from the lock release lever 77, and again the left and right rods 72, 72 are moved. The lock pin 75 is engaged with the upper cutout 72b, so that the ground contact portion G of the traveling crawler 18 is in a stable fixed posture state in which it is substantially parallel to the left and right steering handles 22L, 22R.

  After that, as shown in FIG. 10, the operator M holds the left and right steering handles 22L, 22R while maintaining the front-rear balance of the traveling power spreader 10, and in this state, the traveling crawler 18 is wound around the drive sprocket 15. The traveling power spreader 10 enters the adjacent farm by descending the traveling power spreader 10 along the inclined surface of the shore G1 while the hanging portion 18a is grounded to the inclined surface of the shore G1. Can be made.

  That is, when the traveling power spreader 10 is about to enter the adjacent farm field over the shore G1, the crawler traveling devices 11L and 11R swing upward along the inclined surface of the shore G1. Climbing to the slope starts smoothly. Further, the left and right steering handles 22L and 22R can be gripped without causing a large shift of the center of gravity of the aircraft, and the work of getting over the shore G1 in a stable aircraft posture can be performed.

  Since the crawler traveling devices 11L and 11R are provided with switching operation means K that can switch between a vertically swingable state and a fixed posture state, the crawler traveling devices 11L, 11R, 11R is made to be able to swing up and down, and then the crawler travel to the body frame 12 by the switching operation means K when performing spraying work of powdery or liquid sprayed materials such as agricultural chemicals, fertilizers and seeds while traveling in the field. The postures of the devices 11L and 11R can be easily switched and held in a fixed fixed posture state, so that stable spraying work can be performed and workability is improved.

  The power spreader 31 mounted on the traveling power spreader 10 includes a storage tank 81 for storing powdery or liquid sprays such as agricultural chemicals, fertilizers, and seeds. Since the height is at a high position in terms of the device configuration, the storage tank 81 can be substantially raised by changing the attitude of the machine body so that the sprinkling (replenishment) operation of the sprinkling material into the storage tank 81 can be easily performed. The procedure will be described below.

  First, as illustrated in FIG. 4, the vertical adjustment lever 33 that performs two-stage height adjustment (H1 and H2) of the power spreader 31 is operated, and the base end portion 33a of the vertical adjustment lever 33 is hooked to the hook 23a. The height of the power spreader 31 is adjusted to the lower position (H2) via the parallel link mechanism 25 by being locked at the position (see FIG. 7). Then, by holding the lock release lever 77 provided at the holding portion of the left steering handle 22, the lock pin 75 is engaged with the upper notches 72b of the left and right rods 72, 72 via the left and right wires 76L, 76R. Is released.

  Next, as shown in FIG. 11, while lifting the left and right steering handles 22L, 22R, by releasing the lock release lever 77, the lock pins 75 are engaged with the lower notches 72c of the left and right rods 72, 72. In addition, since the height of the storage tank 81 can be lowered to the height of the waist of the operator M, it is possible to easily perform the operation of charging (supplementing) the sprinkled material into the storage tank 81.

  Also, the crawler traveling devices 11L and 11R collide with the rocking between the driving sprocket 15 and the traveling crawler 18 constituting the crawler traveling devices 11L and 11R, the disengagement of the traveling crawler 18, or the concrete shore. May cause a sudden locking phenomenon of the crawler travel devices 11L and 11R. In this case, a downward rotational force about the drive sprocket 15 as a center of rotation is generated as indicated by an arrow R in FIG. There is a concern that the frame 12 and the traveling transmission system may be damaged.

  Therefore, the traveling power spreader 10 is provided with emergency traveling stopping means S that instantaneously returns the rotational speed of the engine 36 equipped with the centrifugal clutch from the high rotation range to the low rotation range when the above-described locking phenomenon occurs. Hereinafter, the configuration of the emergency travel stop means S will be described.

  As shown in FIGS. 7, 12, and 13, the pair of left and right rods 72, 72 described above are attached to the inner side of the traveling frame 16, which is a substantially intermediate portion between the drive sprocket 15 and the idler 19. However, a compression spring 85 is interposed above the vertical pipe 73a constituting the T-shaped pipe body 73 inserted into the upper portions of the rods 72, 72, and a stopper is provided above the compression spring 85. Plates 86 and 86 are respectively screwed.

  Further, below the stopper plates 86, 86, a swing arm 87 supported so as to be swingable up and down on the upper frame 23 constituting the machine body frame 12 is provided, and the stopper plates 86, 86 are mounted on the swing arm 87. And a pin 87a whose tip is overlapped. Further, the swing arm 87 is connected to a return arm 91 integrated with a throttle lever 89 provided at a grip portion of the right steering handle 22R via a wire 88. The return arm 91, the wire 88, and the pin The emergency running stop means S is constituted by the swing arm 87 provided with 87a, both stopper plates 86, 86 and the like.

  In other words, a sudden locking phenomenon occurs in at least one of the left and right crawler travel devices 11L and 11R, and a rotational force (high torque) in the downward R direction with the drive sprocket 15 as the rotation center. ) Occurs, the rod 72 descends in the direction of the arrow T against the compression spring 85. At this time, the stopper plate 86 that descends integrally with the rod 72 is hit by the pin 87a horizontally provided on the swing arm 87, and the swing arm 87 rotates downward. The return arm 91 integrated with the throttle lever 89 is pulled back to the low speed side via the wire 88 linked to the swing arm 87, thereby instantaneously increasing the rotational speed of the engine 36 equipped with the centrifugal clutch. Thus, even if a sudden lock phenomenon occurs in the crawler traveling devices 11L and 11R as described above, it is possible to avoid damage to the body frame 12 and the traveling transmission system.

  As described above, when a sudden locking phenomenon occurs in the crawler travel devices 11L and 11R as described above, and the rod 72 descends in the direction of the arrow T against the compression spring 85, the upper notch provided on the rod 72 is provided. An appropriate gap is provided in the upper notch 72b so that the 72b and the lock pin 75 engaged with the upper notch 72b collide with each other and the 72b and 75 are not damaged.

  More specifically, as in the mode of operation of the return arm 91 shown in FIGS. 14A to 14C, the base of the throttle lever 89 has a projection 89 a to which the bent piece 91 a of the plate-like return arm 91 is locked. When the return arm 91 is pulled back in the direction of the arrow U through the wire 88, the bent piece 91a of the return arm 91 base is locked to the protrusion 89a of the throttle lever 89 base, and the engine 36 is rotated at a high speed. The throttle lever 89 that is operated to the region side can be automatically returned to the low rotation region operation position.

  In addition, on the lower left side of the shoulder-type power spreader 31 mounted on the traveling power spreader 10, powdery or liquid sprayed materials such as agricultural chemicals, fertilizers, seeds, etc. stored in the storage tank 81 are spread from the spray pipe 61. A metering lever 95 that adjusts the amount of spraying stepwise when discharging is provided. The amount of spraying adjustment by the metering lever 95 can be adjusted from the steering handles 22L and 22R of the traveling power spreader 10. It is configured.

  That is, as shown in FIG. 1 and FIG. 2, a connecting rod 96 linked to a metering mechanism (not shown) is provided substantially horizontally at the base end of the metering lever 95 of the existing power spreader 31. Further, a linkage arm 97 that can be rocked by engaging with the terminal end of the linkage rod 96 is newly provided, and a rod-like push / pull lever 98 connected to the linkage arm 97 is directed toward the rear steering handles 22L and 22R. Further, by fixing a guide member 99 for guiding the push / pull lever 98 to the front frame 26, the amount of spraying from the steering handles 22L and 22R can be adjusted by pushing and pulling the push / pull lever 98. Is possible.

  Although not shown in the plan views and the like shown in FIGS. 2 and 13, the cover C2 enclosing the speed reducer 35, the chain transmission mechanism 37, the intermediate transmission shaft 38, etc. is attached to the body frame 12. The upper frame 23 is configured to be screwed.

  By the way, the traveling power spreader 10 described above is configured so as to be able to travel across a row of paddy rice P grown at a height of 60 to 70 cm in the field, but further stabilizes the left and right balance of the machine body. For example, as shown in FIG. 15 and FIG. 16, a vehicle body frame 112 that can travel across two rows of paddy rice P grown at a height of 60 to 70 cm is provided. The traveling power spreader 110 may be configured.

  That is, the row-and-strand-type travel power spreader 110 has a pair of left and right chain cases 113L on the upper frame 123 that constitutes the body frame 112, like the row-and-strand-type travel power spreader 10. , 113R are screwed in a suspended state. A travel frame 116 is supported on the output shaft 14 below the chain cases 113L and 113R, and a drive sprocket 15 for driving the crawler travel devices 111L and 111R is fixed to the outside of the chain frame 113L and the other end of the output shaft 14. The outer support arms 124L and 124R that support the arm are fixedly opposed to the chain cases 113L and 113R. That is, the upper frame 123, the pair of left and right chain cases 113L and 113R, and the outer support arms 124L and 124R constitute a strong portal-shaped body frame 112.

  In addition, by arranging the chain cases 113L and 113R constituting the portal-shaped body frame 112 inside the crawler traveling devices 111L and 111R, the input shaft 42R of the chain case 113R protruding outside the right chain case 113R is arranged. A belt transmission mechanism 53 having an input pulley 45 fixed to the shaft end of the input shaft 42R, and the belt transmission mechanism can be made to have the same projection amount as that of the traveling power spreader 10 of the single-strand-strand type. The forced swinging means S that swings the spray pipe 61 of the power spreader 31 including the horizontal swing 53 in the horizontal direction can be configured compactly without projecting to the outside of the machine body. The chain cases 113L and 113R themselves have a smooth outer shape, so that a guide action for smoothly guiding the leaves of the paddy rice P can be expected.

  Further, the above-described two-strand-type traveling power spreader 110 is inferior in turning performance in the field compared to the single-strand-strand-type traveling power spreader 10. The turning performance may be improved by providing a side clutch mechanism on the couplings 141 and 141 that transmit power from the shaft end to the input shafts 42L and 42R of the pair of left and right chain cases 113L and 113R.

The side view of a traveling type power spreader (one line over one line type). The top view of a traveling type power spreader (one row and one straddle type). The A arrow directional view in FIG. The side view which shows the height adjustment method of a power spreader. The partially abbreviated rear view showing a state of traveling on the shore upper surface with a traveling power spreader. C arrow line view in FIG. The side view which shows the structure of a switching operation means. The side view which shows the uphill state of the shore by a traveling type power spreader. The side view which shows the state which the traveling type power spreader has climbed to the upper part of the shore. The side view which shows the downhill state of the shore by a traveling type power spreader. The side view which shows the height adjustment method of a storage tank. The side view which shows the structure of an emergency travel stop means. The top view which shows the structure of an emergency travel stop means. The plane which shows the action form of a return arm. The side view of a traveling type power spreader (two rows straddle type). A arrow line view in FIG.

Explanation of symbols

11L crawler travel device (left)
11R crawler travel device (right)
12 Airframe 15 Drive sprocket 18 Crawler 19 Idler 22L Steering handle (left)
22R Steering handle (right)
31 power spreader 36 prime mover G1 shore K switching operation means

Claims (3)

  A pair of left and right crawler travel devices (11L, 11R) in which a crawler (18) is wound around an idler (19) and a drive sprocket (15), and a body frame (12) that supports both crawler travel devices (11L, 11R) The crawler traveling device includes a power spreader (31) and a driving prime mover (36) mounted on the body frame (12) and a steering handle (22L, 22R). A traveling power spreader characterized in that (11L, 11R) is supported on the body frame (12) so as to be swingable up and down.   The traveling power spreader according to claim 1, further comprising switching operation means (K) capable of switching the crawler traveling device (11L, 11R) between a vertically swingable state and a fixed posture state.   A pair of left and right crawler travel devices (11L, 11R) in which a crawler (18) is wound around an idler (19) and a drive sprocket (15), and a body frame (12) that supports both crawler travel devices (11L, 11R) A traveling power spreader equipped with a power spreader (31) and a traveling prime mover (36) on the fuselage frame (12) and a steering handle (22L, 22R). 12) is formed in a gate shape so that it can travel across rice in the field, and the crawler traveling device (11L, 11R) is grounded on the upper surface of the shore (G1). A traveling power spreader characterized in that it can travel.

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