JP4404739B2 - Work machine powder supply structure - Google Patents

Description

  The present invention relates to the ground corresponding to each of the feeding mechanisms, with the carrier air distributed and supplied from the blower to each of the feeding mechanisms by the operation of a plurality of feeding mechanisms arranged in parallel in the left-right direction. It is related with the granular material supply structure of the working machine equipped with the granular material supply apparatus comprised so that it might convey to a discharge | emission part and supply to a farm from those said ground discharge | emission parts.

As a powder body supply structure for a working machine as described above, a plurality of feeding mechanisms arranged in parallel in the left-right direction are divided into a fixed part fixed to the machine body and a detachable part detachable from the fixed part. Some of these feeding mechanisms are configured to be separable, and the fertilizer tank connected to the upper part of the feeding mechanism is configured to be movable to a maintenance position that allows detachment of the detachment portion (see, for example, Patent Document 1). .
JP 2003-164207 A (paragraph numbers 0037 to 0038, FIGS. 5 to 7)

  According to the above configuration, when performing maintenance work such as removing particulate matter such as granular fertilizer adhering to the casing or feeding roll of each feeding mechanism, or replacing the feeding roll, the upper part of each feeding mechanism After moving the fertilizer tank located in the maintenance position, it is necessary to remove the detachment part of each feeding mechanism from the fixed part, and after the maintenance, after assembling the detaching part to the fixed part of each feeding mechanism It is necessary to return the fertilizer tank from the maintenance position to the upper part of each feeding mechanism.

  Moreover, since it is difficult to secure a place for temporarily placing the separation part on the work machine, it is necessary to transport the separation part between the place where the work machine is provided and the temporary placement position outside the machine. become.

  That is, considerable work is required for preparation work for performing maintenance on the inside of the feeding mechanism and assembly work after the maintenance.

  An object of the present invention is to facilitate maintenance of the inside of the feeding mechanism.

As means for solving the above-mentioned problems, in the first invention, a blower in which powder particles fed by the operation of a plurality of feeding mechanisms arranged in parallel in the left-right direction are arranged below the front of the plurality of feeding mechanisms. The supply of powder and granule that is configured to be conveyed to the ground discharge unit corresponding to each of the feeding mechanisms and supplied from the ground discharge unit to the field with the conveying air distributed and supplied to each of the feeding mechanisms from In the powder supply structure of a work machine equipped with a device ,
The casing of each of the feeding mechanisms is configured in a two-part structure that can be divided into an upper case part and a lower case part, and the interior of the casing is made with the rear part of the upper case part and the lower case part as a fulcrum. Each of the feeding mechanisms is configured to be openable, and the inside of the casing is opened by tilting rearward around the left and right axial centers of the rear part of the feeding mechanism and the working posture capable of feeding out the granular material. to the maintenance attitude the attitude switchably configured, the blower tube to form the air flow path over the lower case portion of each of the feeding mechanism from the blower, distribute the carrier air from the blower to the left and right branch And an interchangeable portion that allows switching of the posture of the feeding mechanism is provided in a blowing path from the blower to the branching portion in the blower pipe .
As means for solving the above-mentioned problem, in the second invention, a blower in which powder particles fed by the operation of a plurality of feeding mechanisms arranged in parallel in the left-right direction are disposed below and forward of the plurality of feeding mechanisms. The supply of powder and granule that is configured to be conveyed to the ground discharge unit corresponding to each of the feeding mechanisms and supplied from the ground discharge unit to the field with the conveying air distributed and supplied to each of the feeding mechanisms from In the powder supply structure of a work machine equipped with a device,
The casing of each of the feeding mechanisms is configured in a two-part structure that can be divided into an upper case part and a lower case part, and the interior of the casing is made with the rear part of the upper case part and the lower case part as a fulcrum. Each of the feeding mechanisms is configured to be openable, and the inside of the casing is opened by tilting rearward around the left and right axial centers of the rear part of the feeding mechanism and the working posture capable of feeding out the granular material. A branching unit configured to distribute the conveyance air from the blower to the left and right to a blower pipe that forms a blower path extending from the blower to the lower case part of each of the feeding mechanisms. And an interchangeable portion that allows switching of the posture of the feeding mechanism is provided on the left and right air passages extending from the branch portion to the lower case portion of the air duct.
As means for solving the above-mentioned problem, in the third invention, a blower in which powder particles fed by the operation of a plurality of feeding mechanisms arranged in parallel in the left-right direction are disposed below and forward of the plurality of feeding mechanisms. The supply of powder and granule that is configured to be conveyed to the ground discharge unit corresponding to each of the feeding mechanisms and supplied from the ground discharge unit to the field with the conveying air distributed and supplied to each of the feeding mechanisms from In the powder supply structure of a work machine equipped with a device,
The casing of each of the feeding mechanisms is configured in a two-part structure that can be divided into an upper case part and a lower case part, and the interior of the casing is made with the rear part of the upper case part and the lower case part as a fulcrum. Each of the feeding mechanisms is configured to be openable, and the inside of the casing is opened by tilting rearward around the left and right axial centers of the rear part of the feeding mechanism and the working posture capable of feeding out the granular material. A branching unit configured to distribute the conveyance air from the blower to the left and right to a blower pipe that forms a blower path extending from the blower to the lower case part of each of the feeding mechanisms. A ventilation path extending from the blower to the branch part in the blower pipe, and a left and right ventilation path extending from the branch part to the lower case part in the blower pipe. It is provided with a flexible portion that allows the position switching of the feeding mechanism.

According to the first to third inventions, by simply switching each of the feeding mechanisms from the working posture to the maintenance posture, the inside of the feeding mechanism can be opened without the need for removing the whole or a part thereof, For example, maintenance such as a cleaning operation for removing powder particles adhered to the inside of each casing or the feeding roll, and replacement of the feeding roll can be performed. In addition, after the maintenance, the powder body can be fed out by simply switching each feeding mechanism from the maintenance posture to the working posture.

  In addition, since it is not necessary to remove each feeding mechanism, it is not necessary to secure a place for temporarily placing them and to carry them.

  By the way, in what conveys the granular material fed out from the feeding mechanism with the conveying wind from the blower, the blower is fixedly supported by the traveling machine body, and the blower pipe extending from the blower to each feeding mechanism is made of a hard resin. Since the thing is adopted, unless the connection between the blower by the blower pipe and each feeding mechanism is released, the posture switching of each feeding mechanism is prevented by the blower pipe.

  In other words, in the case of transporting the powder particles fed from the feeding mechanism with the conveying air from the blower, when the feeding mechanism is switched from the working posture to the maintenance posture, the blower is connected to the feeding mechanism by the blower tube in advance. In addition, after switching from the maintenance posture to the working posture of each feeding mechanism, it takes time to connect the blower and each feeding mechanism with the blower pipe.

Therefore, in the first to third inventions , the air blowing pipe is provided with an interchangeable portion that allows the posture switching of each feeding mechanism, so that the posture switching of each feeding mechanism can be performed without the need for attaching and detaching the air blowing pipe. In addition to being able to do so, it is possible to avoid supply failure of the granular material due to forgetting to attach the blower tube.

  Therefore, it is a complicated structure that transports the granular material fed from the feeding mechanism with the conveying air from the blower, but the cleaning operation to remove the granular material adhering to the inside of each casing or the feeding roll and replacement of the feeding roll In addition to being able to effectively reduce the labor and labor required for the maintenance of the inside of the feeding mechanism, etc., it is possible to make it excellent in maintainability, and in addition, poor supply of powder due to forgetting to attach the air duct after that maintenance Can be made excellent in supply workability.

According to the first and third aspects of the invention, the twisting or twisting in the blower pipe caused by the posture switching of each feeding mechanism is absorbed by the interchanged part provided in the blower path extending from the blower to the branching part.

  Therefore, it is possible to obtain a blower pipe that is important for improving the maintenance and supply workability for the inside of the feeding mechanism with a simple and inexpensive configuration in which a flexible portion is provided in the blower path from the blower to the branching portion. Therefore, it is possible to improve the maintenance and supply workability of the inside of the feeding mechanism while simplifying the configuration and reducing the cost.

According to the second and third inventions, the twisting and twisting in the blower pipe caused by the posture switching of each feeding mechanism is caused by the interchanged part provided in the left and right ventilation paths extending from the branch part to the lower case part of the feeding mechanism. Will be absorbed.

  Therefore, it is relatively simple and inexpensive to provide an air blowing pipe which is important for improving the maintainability and supply workability of the inside of the feeding mechanism, and to provide a flexible portion in the left and right air blowing paths extending from the branching portion to the feeding mechanism. The structure can be obtained, and therefore, the maintenance and supply workability for the inside of the feeding mechanism can be improved while simplifying the structure and reducing the cost.

As one of means for making the present invention more suitable , in the fourth aspect of the invention, the interchangeable portion is made of an elastic body that can be elastically deformed.

  According to this configuration, the material characteristics of the elastic body absorb the twisting and twisting in the blower pipe that occurs when the posture of the feeding mechanism is switched, and the posture switching of the feeding mechanism is allowed. The shape can be simplified compared to the case where it is performed. In addition, if a shape characteristic is added, it is possible to better absorb the twisting and twisting of the blower pipe that occurs when the posture of the feeding mechanism is switched, and to allow the posture switching of the feeding mechanism to be more suitably permitted.

  Therefore, the structure can be simplified and the cost can be reduced, and the operability when switching the posture of the feeding mechanism can be improved.

As one of means for making the present invention more suitable , in the fifth aspect of the present invention, the interchangeable portion includes a first interchangeable portion that allows twisting in the blower pipe, and a second that allows a change in tube length. And a flexible portion.

  According to this configuration, the twist in the blower pipe that occurs when the posture of the feeding mechanism is switched is absorbed by the first interchangeable portion, and the change in the tube length at the first interchangeable portion due to the absorption is absorbed by the second interchangeable portion. It will be.

  That is, it is possible to avoid breakage of the flexible portion due to the complex stress that is easily caused when the flexible portion that absorbs the twist in the blower pipe is also configured to absorb the change in the tube length accompanying the absorption.

  Therefore, it is possible to improve the durability at the interchangeable portion of the blower pipe, which is important for making the posture of the feeding mechanism switchable.

As one of means for making the present invention more suitable , in the sixth invention, the interchangeable portion is configured to be detachable.

  According to this configuration, when washing the fertilizer tank, each feeding mechanism, etc., if the ventilation path is cut off at the accommodation section, the water containing the granular material is prevented from flowing into the blower through the blower pipe. it can.

  Accordingly, it is possible to prevent the blower from being rusted due to the flow of cleaning water containing powders such as fertilizer and chemicals into the blower through the blower pipe.

As one of the means for making the present invention more suitable , in the seventh invention, a transport pipe for guiding the granular material from the corresponding feeding mechanism to the ground discharge section is attached to and detached from the feeding mechanism. It is configured to be possible.

  According to this configuration, it is possible to easily remove the transfer pipe that may interfere with the posture switching of the feeding mechanism when switching the posture, and to smoothly switch the posture of the feeding mechanism and attach the transport pipe. It is possible to avoid breakage of the transport pipe caused by forcibly switching the posture of the feeding mechanism in the state where it is in a state.

  Accordingly, it is possible to improve the operability when switching the posture of the feeding mechanism and to use the transport pipe for a long time.

  FIG. 1 shows an overall side view of a riding type rice transplanter, which is an example of a working machine. This rice transplanter is connected to a rear portion of a traveling machine body 1 via a link mechanism 3 that moves up and down by the operation of a hydraulic cylinder 2. The seedling planting device 4 is connected so as to be capable of being driven up and down, and is equipped with a fertilizer application device 5 which is an example of the powder and granular material supply device 5.

  The traveling machine body 1 transmits the power from the engine 6 mounted on the front thereof to the left and right front wheels 9 and the rear wheels 10 via the hydrostatic continuously variable transmission 7 and the gear transmission 8. The driving type is configured to be a riding type in which a boarding operation unit 13 including a steering wheel 11 and a driving seat 12 that steer the left and right front wheels 9 is formed at the front and rear centers thereof.

  The seedling planting device 4 is a working power transmitted from the gear-type transmission 8 transmitted to the power distribution mechanism 14, and a seedling mounting table 15 on which eight mat matted seedlings are placed is reciprocated with a constant stroke in the left-right direction. The rotary-type planting mechanism 16 that is driven and arranged side by side in the left-right direction cuts out a predetermined amount of seedlings from the lower end of the seedling mount 15 and plantes them on the mud that has been leveled by a plurality of leveling floats 17. Each mat-like seedling is vertically driven toward the lower end of the seedling mounting base 15 every time the seedling mounting base 15 reaches the left and right stroke ends, so that up to eight seedlings can be planted. It is configured for 8-row planting.

  As shown in FIGS. 1 to 7, the fertilizer 5 is a rear-wheel drive power output from the gear-type transmission 8, and the feeding mechanism 18 arranged in the left-right direction is stored in the fertilizer tank 19. The granular fertilizer that is driven by a predetermined amount of granular fertilizer, which is an example of a granular material, is transported by the electric blower 20, and the granular fertilizer fed by each feeding mechanism 18 is used as a corresponding ground discharge unit 21. It is comprised for 8-row fertilization which can perform fertilization of a maximum of 8 strips by conveying to each of the grooving devices 21 and supplying them from the respective grooving devices 21 into the field mud.

  The fertilizer tank 19 includes four hoppers 22 that store two pieces of granular fertilizer in the left-right direction, and includes a single lid 23 that opens and closes a fertilizer supply port formed at each upper end thereof. ing. At the lower end of each hopper 22, a fertilizer outlet is formed and a corresponding one of the four feeding mechanisms 18 is connected.

  Each feeding mechanism 18 includes a total of four feeding rolls 25 in a set of two in which a plurality of fertilizer feeding recesses 25a are aligned and formed in the casing 24 connected to the lower end of each hopper 22. Fertilizer feed amount by changing the open area of each feed roll 25 with respect to the fertilizer outlet of the fertilizer tank 19 in parallel with the drive shaft 26 supported by the casing 24 in the left-right orientation and rotating together. And a left-hand feeding roll 25 is driven to rotate by transmitting a rear-wheel drive power to the drive shaft 26 via a fertilizer transmission mechanism 28. By being done, it is comprised so that a maximum of 2 pieces of granular fertilizer can be paid out.

  The fertilizer transmission mechanism 28 is a power take-out portion 31 provided on a transmission shaft 30 that is transmitted from the gear type transmission 8 to the rear axle case 29, and after taking out a part of the power for driving the rear wheels for fertilization, the rod 32 And the left end portion of the drive shaft 26 protruding from the casing 24 of each feeding mechanism 18 from the transmission shaft 34 via the corresponding auxiliary clutch 35. Is transmitted to a drive gear 37 that meshes with a driven gear 36 that is integrally formed therewith. Between the rod 32 and the swing arm 33, a fertilizer application amount adjustment unit 38 that enables adjustment of the fertilizer feed amount by adjusting the swing angle of the swing arm 33 by changing the connecting position of the rod 32 and the swing arm 33. In addition, a power conversion unit 39 for converting the swinging motion of the swinging arm 33 into a rotational motion is provided between the swinging arm 33 and the transmission shaft 34.

  The casing 24 is configured in a two-part structure that can be divided into an upper case portion 24A and a lower case portion 24B, and the upper case portion 24A and the lower case portion 24B are located behind the drive shaft 26 and the transmission shaft. 34 is connected by a connecting shaft 24C arranged and positioned so as to be positioned below 34 so that an opening / closing swinging operation using the connecting shaft 24C as a fulcrum is possible, and a hook-like fixing provided in the lower case portion 24B. The tool 24D can be fixedly held in the closed state.

  The support position of the drive shaft 26 with respect to the casing 24 is set so that the dividing line dividing the upper case portion 24A and the lower case portion 24B passes through the axial center position of the drive shaft 26, and the upper case portion 24A. In association with the opening operation between the lower case portion 24B and the lower case portion 24B, the drive gear 37 externally fitted to the transmission shaft 34 supported by the upper case portion 24A is integrated with the drive shaft 26 received and supported by the lower case portion 24B. The meshing with the driven gear 36 is released away from the formed driven gear 36, so that when the casing 24 is opened, the feeding roll 25 is easily removed from the casing 24 together with the drive shaft 26 and the like. Can do.

  The lower case portion 24B is formed in a bifurcated shape that guides the respective granular fertilizers fed out by the left and right feeding rolls 25 to the left and right, and cylindrical conveying portions 24E set in the front-rear direction at the left and right lower ends. Are integrally formed.

  The transport unit 24E has a front end connected to the blower 20 via the blower tube 40, and a rear end connected to the corresponding groove forming device 21 via a transport tube 41 made of a resin-made flexible tube or the like. . The blower 20 is disposed below the driver seat 12 so as to be positioned at the center of the left and right sides of the traveling machine body 1, and an intake pipe 42 that extends air heated by the engine 6 and the like from the intake port toward the engine 1. Is used for conveying wind, and the adhesion of granular fertilizer to the conveying tube 41 and the groove producing device 21 due to moisture or the like is suppressed. Each grooving device 21 is supported by the corresponding leveling float 17 adjacent to the corresponding planting mechanism 16 so as to supply the granular fertilizer to a portion near the lateral side of the seedling planted by the planting mechanism 16. Equipped.

  Each feeding mechanism 18 is supported together with the fertilizer tank 19 on a support frame 43 provided at the rear end of the traveling machine body 1. The support frame 43 has a movable frame portion 43B, to which each feeding mechanism 18 and the fertilizer tank 19 are connected, to a fixed frame portion 43A erected at the rear end portion of the traveling machine body 1, rather than the connecting shaft 24C for opening and closing the casing. It is configured so as to be able to swing up and down around its axis X1 via a left and right support shaft 43C arranged and set above the rear, and the free end of the movable frame portion 43B is driven A pair of left and right receiving members 44 erected at a predetermined distance from the fixed frame portion 43A in the airframe 1 are received and supported via an elastic body 45, and each of the left and right receiving members 44 and the movable frame portion 43B are supported. The buckle-type fixtures 46 provided over the free ends of the two can be fixed and held in a state of being received and supported by the left and right receiving members 44.

  The left receiving member 44 has a receiving posture in which the movable frame portion 43B is received and held at a predetermined position swung upward from a receiving position by the receiving member 44, and a retracted posture in which the holding is released and retracted. A hook-shaped holding member 47 capable of swinging operation and a resin holder 48 for holding the holding member 47 in the retracted position by elastic engagement of the holding member 47 swinged in the retracted position are provided. It has been.

  From the above configuration, the fixing and holding of the upper case portion 24A and the lower case portion 24B by the fixture 24D provided in the casing 24 of each feeding mechanism 18 is released, and the transport pipe 41 is transferred from the casing 24 of each feeding mechanism 18. In a state in which the movable frame portion 43B is fixedly held at the receiving position by the fixing tool 46, the movable frame portion 43B is moved upward from the receiving position by the receiving member 44 around the left and right axis X1. When it is swung toward each other, each feeding mechanism 18 tilts together with the fertilization tank 19 toward the rear around the left and right axis X1, and with the tilt, the lower end portion is connected to the blower pipe 40. As the connecting shaft 24C of the casing 24 in which the movement of the casing 24 is restricted rises around the axis X1 in the left-right direction, the upper case portion 24A and the lower case portion 24B are connected to each other. 24C in the fulcrum, in a state that relative swinging away from each other, comprising the interior so as to increase the opening on the body front side. And in this open state, if the holding member 47 is switched to the receiving posture to receive and hold the movable frame portion 43B, the cleaning operation or the feeding roll for removing the granular fertilizer adhering to the inside of the casing 24 or the feeding roll 25. Maintenance such as replacement of 25 can be easily performed from the traveling machine body side where the seedling planting device 4 does not get in the way.

Further, after the maintenance, when the holding holding of the movable frame portion 43B by the holding member 47 is released, the movable frame portion 43B is lowered and swung to the receiving position by the receiving member 44 around the left and right axis X1. Each feeding mechanism 18 rises forward together with the fertilization tank 19 around its left-right axis X1 and, along with the standing, movement of the lower end is restricted by connection with the blower pipe 40. When the connecting shaft 24C of the casing 24 is lowered about the left and right axis X1, the upper case portion 24A and the lower case portion 24B are relatively swung in the direction approaching each other with the connecting shaft 24C as a fulcrum. As a result, the large open space is closed on the front side of the aircraft. Then, in this closed state, the upper case portion 24A and the lower case portion 24B of each feeding mechanism 18 are fixed by a fixture 24D, and the transfer pipe 41 is connected to each transfer portion 24E of the lower case portion 24B. if in the fixture 46 fixed accept stop position by receiving member 44 and the movable frame portion 43B, it is possible to feed by each feeding mechanism 18 of the granular fertilizer stored in the hopper 22 of the fertilizer tank 19.

  In other words, by operating the movable frame portion 43B around the left and right axis X1, each feeding mechanism 18 is erected together with the fertilizer tank 19 so that the powder particles stored in the fertilizer tank 19 can be fed. Each feeding mechanism 18 is provided with a fertilizing tank so that maintenance work such as a working posture in which each casing 24 is closed, cleaning work for removing granular fertilizer attached to the inside of the casing 24 and the feeding roll 25, and replacement of the feeding roll 25 is possible. 19 and the maintenance posture in which each casing 24 is opened by being tilted rearward, and the holding member 47 is provided only on the left receiving member 44, so that the operator can move the movable frame portion 43B left and right with the left hand. The holding member 47 can be swung with the right hand while operating around the direction of the center axis X1, and each feeding mechanism 18 can be maintained. Easy maintenance by one person without the need for an auxiliary worker to maintain the posture in the maintenance posture while switching to the posture and switch the posture to the working posture while releasing the posture holding in the maintenance posture of each feeding mechanism 18. Yes.

  Note that a gripping portion 43a is formed at the center of the left and right of the movable frame portion 43B so as to facilitate the posture switching operation.

  As shown in FIG. 5, the connecting portion between the fixed frame portion 43A and the movable frame portion 43B has a first contact portion 49a provided in the fixed frame portion 43A and a first contact portion provided in the movable frame portion 43B. 49b, the first restricting member 49 configured to restrict the upward swing around the axis X1 of the movable frame portion 43B and the second contact with the fixed frame portion 43A. A second restriction configured to restrict the downward swing around the axis X1 of the movable frame portion 43B from the contact portion 50a and the second contact portion 50b provided in the movable frame portion 43B. The member 50 is provided, and these regulating members 49, 50 cause the feeding mechanisms 18 to tilt further backward beyond the maintenance posture, or when the left and right receiving members 44 are not attached to the fuselage. At the time of maintenance with the left and right receiving members 44 removed from the machine body, the fertilizer tank 19, the feeding mechanism 18, etc. are attached to the driver's seat 12 and the seedling stage 15 due to the tilting of the feeding mechanism 18 beyond the working posture. The fertilizer can be used in a state in which the left and right receiving members 44 are not attached to the machine body, and the possibility of interference with surrounding parts such as, the possibility of damage due to excessive load applied to the transport unit 24E and the air duct 40, etc. 5 can be improved.

  As shown in FIGS. 1 to 4, 6, 8, and 9, the blower pipe 40 is made of resin, the first blower pipe 40 </ b> A connected to the blower 20, and the conveying wind guided by the first blower pipe 40 </ b> A. The second blower pipe 40B provided with a branching section 40a that distributes the left and right, and the left and right third blower pipes 40C that guide the conveying air distributed to the left and right by the second blower pipe 40B. To a blower path extending from the conveying section 24E of each feeding mechanism 18 to each other.

  40 A of 1st ventilation pipes are made of hard resin which curves toward the 2nd ventilation pipe 40B from the air blower 20, and the opening of the lower end is connected to the exhaust port of the air blower 20 so that attachment or detachment is possible via the rubber boot 40D. And the opening of the upper end is connected to the opening of the lower end in the 2nd ventilation pipe 40B so that attachment or detachment is possible via the 1st connection pipe 40E.

  The second blower pipe 40B is made of a hard resin formed in a substantially Y shape that facilitates and smoothly distributes the conveying air in the left-right direction, and each opening at the left and right ends corresponds to the corresponding third blower pipe 40C. Is detachably connected to the opening formed at one end via the second connecting pipe 40F.

  Each of the left and right third blower tubes 40C is made of a hard resin in which a small-diameter connection portion 40b to which the corresponding conveyance portion 24E is connected, and the corresponding conveyance portion 24E is made of rubber. It is inserted and connected through the bush 40G.

  The first connecting pipe 40E is composed of a rubber elastic body formed in an accordion shape, and is formed between the first blower pipe 40A and the second blower pipe 40B that are generated when the posture of each feeding mechanism 18 is switched. Absorbs changes in drooping and tube length with its elastic deformation.

  The second connecting pipe 40F is elastically deformed including a first interchangeable portion 40c that is bent and formed with a plurality of protrusions a spaced apart in the circumferential direction, and a second interchangeable portion 40d that is formed in a bellows shape. It is composed of a rubber elastic body capable of twisting between the second blower pipe 40B and the third blower pipe 40C that occurs when the posture of each feeding mechanism 18 is switched by elastic deformation of the first interchangeable portion 40c. Absorbs and absorbs the change in the tube length due to the torsional deformation of the first interchangeable portion 40c by the elastic deformation of the second interchangeable portion 40d, resulting in the torsion occurring between the second blower tube 40B and the third blower tube 40C. The resulting collapse of the first interchangeable portion 40c is prevented by a plurality of protrusions a.

  In other words, each of the first connecting pipe 40E and the left and right second connecting pipes 40F is configured to function as an interchangeable portion A that allows the posture switching of each feeding mechanism 18 to be performed. The posture switching operation can be easily performed without requiring the trouble of releasing the connection between each feeding mechanism 18 and the blower pipe 40. Moreover, when washing the fertilizer tank 19 and each feeding mechanism 18 etc. with water, for example, the water containing the fertilizer is removed by releasing the connection between the left and right third blower pipes 40C and the second connection pipes 40F. Rust of the blower 20 due to flowing into the blower 20 through the blower pipe 40 can be prevented.

  A resin fixing band or the like is employed at each connection location of the blower tube 40 for connection retention.

  As shown in FIGS. 1 to 4, 6, and 10, the upper case portion 24 </ b> A of each casing 24 has a discharge port 24 a that enables discharge of the granular fertilizer remaining in each hopper 22, and the discharge port 24 a A swinging valve body 24b that enables manual opening and closing operation is provided, and a discharge pipe 51 made of a resin-made flexible pipe or the like is connected to the discharge port 24a via a connector 52 provided at one end thereof. Are detachably connected.

  Each connector 52 has a joint portion 52A fitted and joined to the discharge port 24a, and a pair of locking members 52B equipped to be swingable back and forth about a substantially vertical axis X2 on the left and right sides of the connector 52A. By locking to the flange 24c formed in the periphery, it is possible to easily press-fit to the discharge port 24a of each casing 24, and by releasing the locking by the locking tool 52B, the discharge of each casing 24 can be performed. It can be easily removed from the outlet 24a.

  That is, when each feeding mechanism 18 is switched to the maintenance posture, the discharge pipes 51 need to be removed in advance, and each discharging port 24a that needs to be performed after each feeding mechanism 18 is switched to the working posture. The discharge pipe 51 can be easily attached to the head.

  As shown in FIGS. 3, 11, and 12, the left and right transport parts 24 </ b> E of each feeding mechanism 18 can be attached and detached via a single connector 53 provided at one end of a corresponding pair of transport pipes 41. It is connected.

  Each connector 53 is a pair of left and right connecting portions 53A that are externally fitted and joined to the left and right transport portions 24E, and a planar view gate supported by these connecting portions 53A so as to be able to swing back and forth around a first axial center X3 facing left and right. Shaped operation arm 53B and a locking arm 53C in a plan view that is supported by the operation arm 53B so as to be able to swing relative to the second axial center X4 facing left and right. A pair of left and right locking recesses 53a that can be locked to locking protrusions 24e that protrude from the flanges 24d of the left and right transport portions 24E are formed at the ends, and the connection portions 53A are connected to the corresponding transport pipes 41A. And the locking arm 53C is swung around the second axial center X4 facing left and right so that the left and right locking recesses 53a are positioned in front of the corresponding locking protrusions 24e. The operation arm 53B is By swinging backward about the one axis X3 and locking the left and right locking recesses 53a to the corresponding locking protrusions 24e, the left and right transport parts 24E can be easily crimped. In addition, it is possible to hold the crimp by exceeding the dead point of the second axis X4. Further, in this state, the operation arm 53B is swung forward around the first axial center X3 facing left and right to release the locking between the left and right locking recesses 53a and the locking protrusions 24e. The left and right transport sections 24E can be easily removed.

  In other words, the conveyance pipes 41 need to be removed from the respective conveyance units 24E that need to be performed in advance when the respective feeding mechanisms 18 are switched to the maintenance posture, and the respective conveyance units 24E that need to be performed after the respective feeding mechanisms 18 are switched to the working posture. It is possible to easily attach the transfer pipe 41 to the pipe.

  In addition, since the operation arm 53B swings back and forth around the first axial center X3 facing left and right, the connection state and the connection release state of the connector 53 can be switched, so that the switching operation can be performed. Further, it is possible to avoid a decrease in operability due to the hindrance of the transfer pipe 41 and the like arranged side by side.

[Another embodiment]
Other embodiments of the present invention will be listed below.

[1] The working machine may be a direct seeding machine, an agricultural tractor, or an intermediate management machine configured to supply only powder particles .

  In the above intermediate management machine, if the posture in which the feeding mechanism 18 is tilted forward is set as the maintenance posture, the inside of the feeding mechanism 18 is largely opened to the rear side of the machine body in the maintenance posture. Maintenance such as cleaning work for removing the granular fertilizer adhering to the inside of the casing 24 and the feeding roll 25 and replacement of the feeding roll 25 can be easily performed from the rear side of the machine body.

[2] The granular material supply device 5 may be configured so as to deliver powdered fertilizer or powdered medicine by the operation of the feeding mechanism 18.

[3] As the granular material supply device 5, for supply of four strips capable of supplying a maximum of four granular materials, for supply of five strips capable of supplying a maximum of five granular materials, maximum of six granular particles For example, it may be configured to supply 6 strips that can supply the body, or to supply 10 strips that can supply a maximum of 10 powder particles.

[4] As the granular material supply device 5, the blower 20 is arranged on one side of the left and right sides of the traveling machine body 1, and the distribution air supply from the blower 20 to each feeding mechanism 18 is supplied to the left and right blower pipes 40. It may be configured so as to be performed.

  In this configuration, the twisting of the blower pipe 40 and the change in the pipe length that occur when the posture of each feed mechanism 18 is switched are absorbed on the connection end side of the blower pipe 40 with the blower 20. An interchangeable portion A that allows posture switching may be provided.

[5] The ground discharge unit 21 may be configured to spray the powder particles fed by the feeding mechanism 18 from positions away from the ground.

[6] The first blower pipe 40A is a rubber elastic body that absorbs the twist between the blower 20 and the second blower pipe 40B generated by the switching of the posture of each feeding mechanism 18 by its elastic deformation. It may be configured to function as a flexible portion A that allows the posture switching of each feeding mechanism 18 to be switched.

  In this configuration, if the first blower pipe 40A is formed so that its lower end opening is directly connected to the exhaust outlet of the blower 20, and its upper end opening is directly connected to the lower end opening of the second blower pipe 40B, The boot 40D, the first connection pipe 40E, and the like can be omitted, and the number of parts can be reduced and the assembly can be facilitated.

[7] The first blower pipe 40A and the second blower pipe 40B are twisted or twisted between the blower 20 and the right and left third blower pipes 40C generated by switching the posture of each feeding mechanism 18. A rubber elastic body that absorbs the elastic deformation may be integrally formed so as to function as a flexible portion A that allows the posture switching of each feeding mechanism 18.

  In this configuration, the rubber blower pipe in which the first blower pipe 40A and the second blower pipe 40B are integrated, the lower end opening corresponds to the exhaust port of the blower 20, and the left and right openings correspond to the third opening. If it is formed so as to be directly connected to the opening of the blower tube 40C, the boot 40D, the first connection tube 40E, the left and right second connection tubes 40F, etc. can be eliminated, and the number of parts can be reduced and the assembly can be facilitated.

  Further, in this configuration, a plurality of protrusions a are formed on the left and right pipe portions connected to the left and right third blower pipes 40C in the rubber blower pipes at a predetermined interval in the circumferential direction thereof. Further, in these pipe portions, it is possible to prevent crushing due to twisting deformation of the third blower pipe 40 </ b> C that is generated when the posture of each feeding mechanism 18 is switched.

[8] The first connecting pipe 40E and the left and right second connecting pipes 40F are formed integrally with the second blower pipe 40B, and the whole functions as a flexible portion A that allows the posture switching of each feeding mechanism 18 to be switched. It may be configured.

[9] A plurality of protrusions a are formed in the first connecting pipe 40E functioning as the interchangeable portion A at a predetermined interval in the circumferential direction thereof, and the first air blow is performed in accordance with the posture switching of each feeding mechanism 18. You may make it prevent the collapse of the 1st connection pipe 40E resulting from the twist which generate | occur | produces between the pipe | tube 40A and 2nd ventilation pipe 40BC.

[10] You may make it each flexible part A comprise a flexible resin.

[11] As shown in FIG. 13, the left and right second connection pipes 40F functioning as the accommodation section A are rotated relative to the second blower pipes 40B, and are generated as the posture of each feeding mechanism 18 is switched. You may comprise so that the twist between the 2 ventilation pipes 40B and the 3rd ventilation pipe 40C may be absorbed.

  If the structure is explained in full detail, the cyclic | annular latching groove | channel 40e along those outer periphery is formed in each edge part of the right and left in the 2nd ventilation pipe 40B. Each of the left and right second connection pipes 40F is a hard resin that is fitted into the first blower pipe 40B and the first pipe body 40f made of a hard resin that extends between the second blower pipe 40B and the third blower pipe 40C. A resin-made second tubular body 40g and a hard resin-made third tubular body 40h that is externally fitted to the first tubular body 40f so as to be slidable relative to each other are configured. Four locking pieces b that can be elastically deformed in the direction and an annular receiving portion c for the third blower tube 40C are integrally formed, and each locking piece b has a locking groove 40e of the second blower tube 40B. A protrusion b1 that can be engaged with the first tubular body, a cam surface b2 that engages the protrusion b1 with the engagement groove 40e by sliding contact with the third tubular body 40h, and an engagement recess b3 with respect to the third tubular body 40h. The third tubular body 40h is formed with an annular projection d that can be locked in the locking recess b3.

  Then, after fitting the second tubular body 40g into the second blower pipe 40B, the first tubular body 40f is engaged with the projection b1 of each locking piece b and the locking groove 40e of the second blower pipe 40B. It passes over to the 2nd ventilation pipe 40B and the 3rd ventilation pipe 40C so that it can stop, and in this state, the annular projection d is the latching recessed part b3 of each latching piece b. When sliding to the position where it is locked, the projection b1 is engaged with the locking groove 40e in a state in which the cam surface b2 can be slid relative to the circumferential direction. The third tubular body 40h is fixed by the locking of the protrusion d and the locking recess b3, so that the second blower pipe 40B and the third blower pipe 40C are connected to the second blower pipe 40B with respect to the second blower pipe 40B. The three air blow pipes 40C can be connected in a state allowing relative rotation.

  Further, in this connected state, the engagement between the annular protrusion d of the third tube body 40h and the engagement recess b3 of each engagement piece b is released, and the third tube body 40h is connected to each of the first tube bodies 40f. When sliding in the direction away from the locking piece b, the protrusion b1 of each locking piece b releases the engagement of the second blower pipe 40B into the locking groove 40e, and the second blower pipe 40B is engaged with the second blower pipe 40B. The first pipe body 40f can be relatively slid, and the entire second connection pipe 40F can be separated from the corresponding third blower pipe 40C. The communication between the second blower pipe 40B and the third blower pipe 40C can be achieved. Can be disconnected.

  In addition, the code | symbol 40i shown in FIG. 13 is a sealing member interposed between the 3rd ventilation pipe 40C and the 1st pipe 40f. In addition, for fixing the connection between the third blower pipe 40C and the second connection pipe 40F, it may be possible to employ a resin fixing band or the like.

[12] As the connector 53 that removably connects the transport pipe 41 to the feeding mechanism 18, a connector having the same fixing structure as the connector 52 that removably connects the discharge pipe 51 to the feeding mechanism 18 may be adopted.

Overall side view of the riding type rice transplanter Longitudinal front view of the main part showing the configuration of the fertilizer application equipment Side view of essential parts showing the state where the feeding mechanism is switched to the working posture Side view of the main part showing the state where the feeding mechanism is switched to the maintenance posture Longitudinal side view of main part and vertical front view of main part showing support structure of feeding mechanism Longitudinal side view of the main part showing the configuration of the feeding mechanism Longitudinal front view of the main part showing the configuration of the feeding mechanism Longitudinal front view showing the configuration of the main part of the air duct Longitudinal side view of second connecting pipe as an example of interchangeable part Cross-sectional plan view of the main part showing the configuration of the connector for the discharge pipe Side view of the main part showing the configuration of the connector for the transport pipe Longitudinal front view of the main part showing the configuration of the connector for the transport pipe Longitudinal front view of essential parts showing the configuration of the accommodation part in another embodiment

5 Powder and Particle Supply Device 18 Feeding Mechanism 20 Blower 21 Ground Discharge Unit
24 casing
24A Upper case part
24B Lower case part 40 Blower pipe 40a Branching part 40c 1st interchangeable part 40d 2nd interchangeable part 41 Conveyance pipe A Interchangeable part X1 Axis center

Claims (7)

The granular material fed by the operation of a plurality of feeding mechanisms arranged side by side in the left-right direction, respectively, with a conveying wind distributed and supplied to each of the feeding mechanisms from a blower arranged at the front lower side of the plurality of feeding mechanisms , respectively It is a granular material supply structure of a work machine equipped with a granular material supply device configured to be transported to a ground discharge unit corresponding to the feeding mechanism of the above and supplied to the field from the ground discharge unit. And
The casing of each of the feeding mechanisms is configured in a two-part structure that can be divided into an upper case part and a lower case part, and the interior of the casing is made with the rear part of the upper case part and the lower case part as a fulcrum. Configured to be openable,
Each of the feeding mechanisms has a working posture capable of feeding the powder and a maintenance posture in which the inside of the casing is opened by being tilted rearward around a left and right axial center of the rear portion of the feeding mechanism . Configured to switch posture,
The blower tube to form the air flow path over the lower case portion of each of the feeding mechanism from the blower, comprising a branch unit for distributing the carrier air from the blower to the right and left, the branch from the air blower in the blower pipe The powder body supply structure of a working machine in which a flexible portion that allows posture switching of the feeding mechanism is provided in the air blowing path extending over the portion . The granular material fed by the operation of a plurality of feeding mechanisms arranged side by side in the left-right direction, respectively, with a conveying wind distributed and supplied to each of the feeding mechanisms from a blower arranged at the front lower side of the plurality of feeding mechanisms, respectively It is a granular material supply structure of a work machine equipped with a granular material supply device configured to be transported to a ground discharge unit corresponding to the feeding mechanism of the above and supplied to the field from the ground discharge unit. And
The casing of each of the feeding mechanisms is configured in a two-part structure that can be divided into an upper case part and a lower case part, and the interior of the casing is made with the rear part of the upper case part and the lower case part as a fulcrum. Configured to be openable,
Each of the feeding mechanisms is in a working posture capable of feeding out the granular material, and a maintenance posture in which the inside of the casing is opened by being tilted rearward around the left and right axial centers of the rear portion of the feeding mechanism. Configured to switch posture,
A blower pipe that forms a blower path extending from the blower to the lower case part of each of the feeding mechanisms includes a branch part that distributes the conveying air from the blower to the left and right, and the lower part from the branch part in the blower pipe A granular material supply structure for a working machine in which left and right ventilation paths over a side case portion are provided with an accommodation portion that allows posture switching of the feeding mechanism . The granular material fed by the operation of a plurality of feeding mechanisms arranged side by side in the left-right direction, respectively, with a conveying wind distributed and supplied to each of the feeding mechanisms from a blower arranged at the front lower side of the plurality of feeding mechanisms, respectively It is a granular material supply structure of a work machine equipped with a granular material supply device configured to be transported to a ground discharge unit corresponding to the feeding mechanism of the above and supplied to the field from the ground discharge unit. And
The casing of each of the feeding mechanisms is configured in a two-part structure that can be divided into an upper case part and a lower case part, and the interior of the casing is made with the rear part of the upper case part and the lower case part as a fulcrum. Configured to be openable,
Each of the feeding mechanisms has a working posture capable of feeding the powder and a maintenance posture in which the inside of the casing is opened by being tilted rearward around a left and right axial center of the rear portion of the feeding mechanism. It can be configured to switch posture,
The air supply pipe that forms the air supply path extending from the blower to the lower case part of each of the feeding mechanisms includes a branch part that distributes the conveying air from the air blower to the left and right, and the branch part from the fan in the air supply pipe. The supply structure for a granular material of a working machine in which a flexible portion that allows posture switching of the feeding mechanism is provided on a left and right ventilation path extending from the branching portion to the lower case portion in the blowing pipe .   The granular material supply structure for a working machine according to any one of claims 1 to 3, wherein the interchangeable portion is formed of an elastic body that can be elastically deformed.   The working machine according to any one of claims 1 to 4, wherein the interchangeable portion includes a first interchangeable portion that allows torsion in the blower pipe and a second interchangeable portion that allows a change in tube length. Granular material supply structure.   The granular material supply structure for a working machine according to any one of claims 1 to 5, wherein the interchangeable portion is configured to be detachable.   The work machine according to any one of claims 1 to 6, wherein a conveying pipe that guides the granular material from the corresponding feeding mechanism to the ground discharge unit is detachable from the feeding mechanism. Powder body supply structure.

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