JP7209285B2 - Agricultural material supply device - Google Patents

Description

The present invention comprises a material tank in which agricultural materials to be supplied to a field are stored, and a retrieval and supply unit connected to the material tank to retrieve the agricultural material from the material tank and to supply the retrieved agricultural material to the field. The material tank is provided with a tank body, and a lid supported by the tank body so as to be swingable about an opening/closing axis and opening and closing a material input port of the tank body. .

Examples of the above-described agricultural material supply apparatus include a direct seeding apparatus for sowing seed rice as an agricultural material in a field, a chemical applicator for supplying a chemical as an agricultural material to a field, and a fertilizer as an agricultural material, as shown in Patent Document 1. There is a fertilizing device that supplies the field. The direct seeding device includes a seed storage unit as a seed tank, and a seed delivery unit for delivering seeds from the seed storage unit and sowing the delivered seeds in a field. The seed storage unit includes a seed hopper as a tank body. and a lid that is swingably supported by the seed hopper and opens and closes a seed replenishment port as a seed input port of the seed hopper. The drug applicator includes a drug storage portion as a drug tank, and a drug delivery portion for feeding the drug from the drug storage portion and supplying the delivered drug to a field. The drug storage portion includes a drug hopper as a tank main body. and a lid that is swingably supported by the medicine hopper and opens and closes a medicine replenishing port as a medicine inlet of the medicine hopper. The fertilizing device includes a fertilizer storage unit as a fertilizer tank, and a fertilizer delivery unit that delivers fertilizer from the fertilizer storage unit and supplies the delivered fertilizer to a field. The fertilizer storage unit includes a fertilizer hopper as a tank body. and a lid that is swingably supported by the fertilizer hopper and opens and closes a fertilizer supply port as a fertilizer input port of the fertilizer hopper.

The material tank includes a tank body and a lid supported by the tank body so as to be swingable about an opening/closing axis and opening and closing a material inlet of the tank body. and a hinge mechanism that swingably supports the lid on the tank body. The hinge mechanism includes a support portion provided on the tank body, a connecting portion provided on the lid, and a hinge pin that swingably connects the connecting portion to the support portion and has an opening/closing axis. . Conventionally, as such a hinge mechanism, one of the connecting portion and the support portion is configured to grip the hinge pin, thereby preventing the hinge pin from coming off.

JP 2015-97502 A

Conventionally, in order to attach the cover to the tank body, the hinge pin must be fitted into the connecting portion and the supporting portion against the strong mounting reaction force of one of the connecting portion and the supporting portion, requiring a tool. In addition, since a strong fitting force is required, it takes time and effort.

SUMMARY OF THE INVENTION The present invention provides an agricultural material supply device that allows easy and quick attachment of a lid to a tank body.

The agricultural material supply device according to the present invention is
a material tank in which agricultural materials to be supplied to fields are stored;
a retrieval and supply unit connected to the material tank to retrieve agricultural materials from the material tank and to supply the retrieved agricultural materials to a farm field;
The material tank includes a tank main body, a cover supported by the tank main body so as to be swingable about an opening/closing axis and opening and closing a material input port of the tank main body, and the tank main body and the cover being provided. and a hinge mechanism for swingably supporting the lid on the tank body,
The hinge mechanism includes a support portion provided in the tank body and formed with a first pin hole, a connecting portion provided in the lid body and formed with a second pin hole, the first pin hole and the a hinge pin that is inserted into the second pin hole and has the opening/closing axis, and that connects the connecting portion to the supporting portion in a swingable manner;
a connecting pin portion formed in an intermediate portion of the hinge pin and inserted into the first pin hole and the second pin hole to connect the connecting portion to the support portion so as to swing; The hinge pin is formed at portions on both end sides of the connecting pin portion of the hinge pin and has an outer diameter larger than the outer diameter of the connecting pin portion, and extends from the first pin hole and the second pin hole. and a retaining collar that prevents the slip-out of the
When passing through the first pin hole and the second pin hole, the retaining flange has an outer diameter larger than the hole diameter of the first pin hole and the hole diameter of the second pin hole. configured to be elastically deformable so as to become smaller ,
The retainer collar has a guide portion in an inclined posture with a smaller diameter toward the end of the hinge pin, and penetrates the hinge pin in a diametrical direction in a region extending from a position overlapping the guide portion to the connecting pin portion. A through hole is formed to

According to this configuration, when the hinge pin is inserted into the first pin hole of the support portion and the second pin hole of the connecting portion, the retainer collar portion is pulled out when passing through the first pin hole and the second pin hole. The retainer collar is elastically deformed toward the diameter reduction side by the pressing action of the support part and the connecting part against the retainer collar, and the outer diameter of the retainer collar becomes smaller than the hole diameters of the first pin hole and the second pin hole. , the retainer flange passes through the first pin hole and the second pin hole. When the retainer collar passes through the first pin hole and the second pin hole and is positioned on the lower side in the insertion direction with respect to the support section and the connection section, the support section and the connection section are no longer pressed against the retainer collar, and the retainer is retained. The collar part is elastically restored, the outer diameter of the retainer collar part becomes the original size larger than the outer diameter of the first pin hole and the second pin hole, and the hinge pin first opens the first pin hole and the second pin hole. It is prevented by the retainer flange elastically restored to the original outer diameter from coming out of the first pin hole and the second pin hole in the direction opposite to the direction in which it was inserted.
According to this configuration, the retainer flange can be elastically deformed with a simple structure having only the through hole, so that the lid can be attached to the tank body easily and quickly. Further, according to this configuration, the retaining flange can be easily inserted into the first pin hole and the second pin hole by being guided by the guide portion, and the hinge pin portion which is elastically deformed due to the diameter reduction of the retaining flange can be prevented. Since the range is widened and the retainer flange is easily elastically deformed, the hinge pin can be easily and smoothly inserted into the first pin hole and the second pin hole.

Therefore, simply by pushing the hinge pin toward the first pin hole and the second pin hole, the hinge pin can be easily and smoothly mounted across the connecting portion and the supporting portion, and the hinge pin can be removed from the connecting portion and the supporting portion. are blocked by the retainer flanges on both end sides, and the lid can be attached to the tank body easily and quickly.

In the present invention, only one of the retaining flanges on both ends is elastically deformable, and the other one of the retaining flanges on both ends is configured to be elastically deformable. It is preferable that the end of the hinge pin on the side where the flange is located is formed into a flat surface.

According to this configuration, by pushing the end of the flat surface, it is easy to apply an operating force to the hinge pin for inserting the hinge pin into the first pin hole and the second pin hole. The second pin hole allows easy and smooth insertion.

In the present invention, a pair of the support portions are provided, and a pair of the connection portions are provided, and one support portion of the pair of support portions and the one support portion of the pair of connection portions are connected to each other. a first connecting part having a corresponding one connecting part, the other supporting part of the pair of supporting parts, and the other connecting part corresponding to the other supporting part of the pair of connecting parts and a second connection target part having a first connection that is divided into the first connection target part and the second connection target part and attached to the first connection target part and the second connection target part A pin portion and a second connecting pin portion are distributed to one end side portion and the other end side portion of the connecting pin portion, and the through hole is provided in the first connecting pin portion and the second connecting pin portion. is preferably provided corresponding to only the first connecting pin portion of the.

According to this configuration, the support portion and the connecting portion in one of the first connecting portion and the second connecting portion are the first connecting pin portion whose connecting strength is lower than that of the second connecting pin portion due to the through hole. However, the support portion and the connecting portion in the other of the first connecting portion and the second connecting portion are firmly connected by the second connecting pin portion having a higher connecting strength than the first connecting pin portion. Therefore, the hinge pin can be easily mounted by the action of the through hole, and the lid can be firmly supported by the tank body.

In the present invention, the hinge pin is preferably made of resin.

According to this configuration, the hinge pin can be manufactured from a resin material, so that the hinge pin can be obtained at a low cost.

In the present invention, the tank main body has a storage part in which agricultural materials are stored, and a tubular part extending downward from a lower part of the storage part and connected to the extraction supply part, and The take-out/supply unit has a take-out/supply case for taking in the agricultural material from the material tank, and an annular connection part formed in the upper part of the take-out/supply case and fitted inside the tubular part. It is preferable that a portion is integrally formed with the storage portion.

According to this configuration, the cylindrical portion can be formed integrally with the tank body, so that the tank body having the cylindrical portion can be manufactured easily and inexpensively.

In the present invention, it is preferable that a reinforcing rib is formed on the inner surface side of the cylindrical portion, and a contact portion that contacts the connecting portion from above is formed below the reinforcing rib.

According to this configuration, the load of the material tank can be taken out and firmly supported by the supply case by means of a simple support structure utilizing reinforcing ribs in the connection member that receives and supports the material tank in the supply case.

It is a left view which shows the whole ride-on type rice transplanter. It is a top view which shows the whole riding-type rice transplanter. It is a front view which shows an agricultural material supply apparatus. FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 3; 4 is a cross-sectional view taken along line VV of FIG. 3; FIG. FIG. 5 is a cross-sectional view taken along line VI-VI in FIG. 4; FIG. 4 is a cross-sectional view taken along line VII-VII of FIG. 3; It is a sectional view showing a hinge mechanism. It is a perspective view which shows a hinge mechanism. It is a perspective view which shows a hinge pin.

An embodiment, which is an example of the present invention, will be described below with reference to the drawings.
1 and 2, the direction of arrow B is the "back of the body", and the direction of arrow B is the "rear of the body". , the direction of arrow D is defined as ``downward,'' the direction of arrow L shown in FIG. 2 is defined as ``left,'' and the direction of arrow R is defined as ``right.

As shown in FIGS. 1 and 2, the riding-type rice transplanter has a traveling body equipped with a pair of left and right front wheels 1 steerable and drivable and a pair of left and right rear wheels 2 drivable. ing. A driving unit 4 having an engine 3 is formed in the front part of the traveling body. At the rear of the traveling machine body, a riding type driving section 7 having a driver's seat 5 and a steering wheel 6 for steering the front wheels 1 is formed. A seedling planting device 10 is connected via a link mechanism 9 to the rear part of the body frame 8 of the running body. The seedling planting apparatus 10 has a descending working state in which the ground float 11 touches the field due to the vertical swing motion of the link mechanism 9 with respect to the body frame 8, and an ascending non-working state in which the grounding float 11 leaves the field upward. It is operated up and down through the state. A fertilizing device 20 for supplying powdery fertilizer to seedlings planted by the seedling planting device 10 is provided at the rear portion of the traveling machine body. At the rear of the seedling planting device 10, there is provided an agricultural material supply device 30 for spraying a powdery chemical for weeding behind the seedling planting device 10 in the width direction of the traveling machine body.

[Regarding the configuration of the seedling planting device]
The seedling planting apparatus 10, as shown in FIGS. 1 and 2, has a planting body 13 composed of four planting transmission cases 12 arranged at intervals in the width direction of the traveling body. A seedling planting mechanism 14 is drivably supported on both lateral sides of the rear portion of each of the four planting transmission cases 12 . Above the planting machine body 13, one seedling mounting table 15 having eight seedling mounting parts arranged in the width direction of the traveling machine body is provided. The seedling mounting table 15 is horizontally reciprocated in a state interlocked with the seedling planting movement of the seedling planting mechanism 14, and the mat-like seedlings mounted on each seedling mounting portion are transferred to the seedling corresponding to the seedling mounting portion. It reciprocates in the left-right direction with respect to the attachment mechanism 14 . As a result, the pair of planting arms 14a of each seedling planting mechanism 14 alternately picks up seedlings for planting from the mat-like seedlings placed on the seedling placement section, holds the picked seedlings for planting, and places them in the field. Descend and plant in the field. At the bottom of the planting machine 13, the seedling planting machine 10 is arranged in the width direction of the traveling machine, supports the seedling planting device 10 in the lowered operation state, and defines a seedling planting position by the seedling planting mechanism 14 in the field. Five ground floats 11 are supported which level the ground prior to planting 14 seedlings. The seedling planting device 10 is capable of planting seedlings by eight seedling planting mechanisms 14 arranged in the width direction of the traveling body, that is, seedling planting in eight rows.

[Regarding the configuration of the fertilizing device]
As shown in FIGS. 1 and 2, the fertilizer applicator 20 includes two fertilizer tanks 21 arranged in the width direction of the traveling machine body, a fertilizer feeding unit 22 connected to the lower part of each fertilizer tank 21, and a fertilizer feeding unit 22 connected to the lower part of each fertilizer tank 21. and a blower 23 connected to the supply unit 22 . Four fertilizing hoses 24 are extended toward the seedling planting device 10 from a fertilizer delivery supply unit 22 connected to one fertilizer tank 21 of the two fertilizer tanks 21, and the other fertilizer tank of the two fertilizer tanks 21. Four fertilizing hoses 24 are extended toward the seedling planting device 10 from a fertilizer feed-out supply section 22 connected to 21 . The eight fertilizing hoses 24 are individually connected to a total of eight fertilizer applicators 25 provided one by one on the lateral side of each of the eight seedling planting mechanisms 14 .

In the fertilizing device 20, a fertilizer delivery supply unit 22 connected to each of two fertilizer tanks 21 delivers powdery fertilizer from the fertilizer tank 21, and blows the delivered fertilizer to four fertilizing hoses by air from a blower 23. 24. Each fertilizing device 25 forms a groove in the field on the lateral side of the seedling location by the seedling planting mechanism 14, and supplies the fertilizer supplied by the fertilizing hose 24 to the formed groove.

[Regarding the configuration of the agricultural material supply device]
As shown in FIGS. 1 and 2, the agricultural material supply device 30 is supported by the support frame 16 while being arranged in the center of the seedling planting device 10 in the horizontal direction in plan view. The agricultural material supply device 30 is supported by the support frame 16 in a state in which the material tank 30A is in a forward tilted posture in which the upper end side is positioned forward. The support frames 16 extend upward from the planting transmission cases 12 adjacent to each other across the center of the seedling planting device 10 in the left-right direction among the four planting transmission cases 12 .

As shown in FIGS. 1 and 3, the agricultural material supply device 30 includes a material tank 30A in which powdered chemicals are stored, and a take-out supply section 30B connected to the lower part of the material tank 30A. The take-out supply unit 30B takes out the chemical from the material tank 30A, scatters the taken-out chemical in the left-right direction of the running body behind the seedling planting device 10, and spreads the seedling planting device 10 in the lateral direction of the field. The chemical is supplied to the field by spraying it on the part corresponding to the attached range.

As shown in FIGS. 5 and 6, the tank main body 31 of the material tank 30A is provided with a storage portion 31b in which agricultural materials are stored, and a cylindrical portion 32 extending downward from the lower portion of the storage portion 31b. ing. The cylindrical portion 32 is formed integrally with the storage portion 31b when the tank body 31 is formed. The tank main body 31 and the tubular portion 32 are made of resin. As shown in FIG. 6, reinforcing ribs 33 are integrally formed on the inner surface of the tubular portion 32 . The reinforcing ribs 33 are provided at a plurality of positions in the circumferential direction of the cylindrical portion 32 . An annular connecting portion 41 is formed in the upper portion of the take-out supply case 40 in the take-out supply portion 30B. By connecting the cylindrical portion 32 and the connecting portion 41 in a state in which the connecting portion 41 fits inside the cylindrical portion 32, the material tank 30A and the take-out supply portion 30B are connected. The material tank 30A can be removed upward from the take-out supply case 40. As shown in FIG. In a state in which the tubular portion 32 and the connecting portion 41 are connected, the contact portion 33a formed at the lower portion of each reinforcing rib 33 abuts the connecting portion 41 from above. The load of the material tank 30A is received and supported from below by the take-out supply case 40 via the reinforcing ribs 33. As shown in FIG. Snap locks 34 (see FIG. 3) for fixing the material tank 30A to the take-out supply case 40 are provided on both sides of the tubular part 32 across the tubular part 32 and the take-out supply case 40. As shown in FIG.

[Regarding the configuration of the take-out/supply part]
The takeout/supply section 30B includes a takeout/supply case 40, as shown in FIGS. The take-out supply case 40 is supported by the support frame 16 via a connecting member 42 attached to the front portion of the take-out supply case 40, as shown in FIGS.

As shown in FIGS. 3, 4, 5, 6, and 7, the take-out supply case 40 includes a delivery supply case portion 43 having a connection portion 41 and a driving mechanism case portion 44 connected to the lower portion of the delivery supply case portion 43. , a left spreading case portion 46 connected to the left side portion of the driving mechanism case portion 44 , and a right spreading case portion 47 connected to the right side portion of the driving mechanism case portion 44 . Each of the delivery supply case portion 43, the driving mechanism case portion 44, the left spreading case portion 46, and the right spreading case portion 47 is made of resin.

As shown in FIGS. 4, 5 and 6, the delivery supply member 48 is housed in the delivery supply case portion 43 . A vertically oriented rotary support shaft 49 of the feeding member 48 is rotatably supported by the boss portion 43 a of the feeding case portion 43 and the boss portion 50 b of the sheet metal member serving as the metal supporting member 50 . The delivery supply member 48 is supported by the metal support member 50 so as to be able to swing about the rotary support shaft 49 as a swing fulcrum. The metal support member 50 is provided inside the driving mechanism case portion 44 . Downward bending connecting portions 50a are provided on the left and right side portions of the front portion of the metal support member 50 . The left and right bending connecting portions 50a are connected to the left and right lateral wall portions 51d of the driving mechanism case portion 44, and the metal support member 50 is supported by the driving mechanism case portion 44. As shown in FIG. A pair of feed-out supply holes 48a are opened in the free end portion of the feed-out supply member 48. As shown in FIG. The feed-out supply member 48 is driven by a drive gear 52 provided on the rotary support shaft 49 so as to reciprocate in the left-right direction with the rotary support shaft 49 as a swinging fulcrum. The drug is delivered from the funnel portion 31a of the . One delivery supply hole 48 a drops the delivered medicine into the left supply hole 53 communicating with the inside of the left dispersion case part 46 and supplies it to the inside of the left dispersion case part 46 . The other delivery supply hole 48 a drops the delivered medicine into the right supply hole 54 communicating with the inside of the right dispersion case part 47 to supply the medicine to the inside of the right dispersion case part 47 . A shutter 38 shown in FIGS. 5 and 6 opens and closes the drug outlet of the funnel 31a. The shutter 38 is slid and opened/closed by the rocking movement of the operating lever 38a.

As shown in FIG. 6 , a right scattering member 56 is rotatably accommodated in a portion below the right supply hole 54 inside the right scattering case portion 47 . As shown in FIGS. 6 and 7, a right spraying port 47a is opened downward in the lower portion of the right spraying case portion 47. As shown in FIGS. In the right scattering case portion 47 , the medicine supplied to the inside of the right scattering case portion 47 by the delivery supply member 48 is supplied to the right scattering member 56 and is scattered inside the right scattering case portion 47 by the right scattering member 56 . . The scattered chemicals strike the right guide section formed inside the right spray case section 47, are guided by the right guide section, and are guided from the right spray port 47a to the right half of the planting range of the seedling planting device 10 in the field. It is sprayed on the part corresponding to the part.

As shown in FIG. 6 , a left scattering member 55 is rotatably accommodated in a portion below the left supply hole 53 inside the left scattering case portion 46 . As with the right spraying case portion 47, the left spraying case portion 46 has a downwardly opened left spraying port 46a in the lower portion thereof. In the left scattering case portion 46 , the medicine supplied to the inside of the left scattering case portion 46 by the delivery supply member 48 is supplied to the left scattering member 55 and is scattered inside the left scattering case portion 46 by the left scattering member 55 . . The scattered chemicals strike the left guide section formed inside the left spray case section 46 and are guided by the left guide section, and are guided from the left spray port 46a to the left half of the planting range of the seedling planting device 10 in the field. It is sprayed on the part corresponding to the part.

As shown in FIGS. 4, 5 and 6, the driving mechanism case portion 44 includes a bottom wall portion 44a, a left partition wall 51a projecting upward from the left end portion of the rear portion of the bottom wall portion 44a, and a bottom wall portion. A right partition wall 51b protrudes upward from the right end portion of the rear portion of the bottom wall portion 44a, and a portion of the bottom wall portion 44a on the front side of the left partition wall 51a and the right partition wall 51b protrudes upward from the left and right end portions thereof. and a front vertical wall portion 51c projecting upward from the front end portion of the bottom wall portion 44a. In the space S surrounded by the bottom wall portion 44a, the left partition wall 51a, the right partition wall 51b, the lateral wall portion 51d, and the front vertical wall portion 51c, power is directed toward the delivery supply member 48, the left scattering member 55, and the right scattering member 56. An electric driving mechanism 45 for outputting is housed.

The electric drive mechanism 45 is housed in the front portion of the space S and accommodates a feed electric motor 57 that outputs power toward the feed supply member 48, and the rear portion of the space S is housed in the left scattering member 55. and one scattering electric motor 59 that outputs power toward the right scattering member 56 . As shown in FIGS. 4 and 5, the feeding electric motor 57 is supported on the lower surface side of the metal support member 50. As shown in FIGS. A distal end portion of an output shaft 57 a of the feeding electric motor 57 protrudes upward from the metal support member 50 through an opening of the metal support member 50 . An output gear 58 rotatably provided on the distal end portion of the output shaft 57a is meshed with the drive gear 52 . As shown in FIGS. 4, 5 and 6, the scattering electric motor 59 is supported by the left partition wall 51a and the right partition wall 51b. The tip side portion of the left output shaft 59a of the scattering electric motor 59 is inserted into the left scattering case portion 46 through the opening of the left partition wall 51a, and the left scattering member 55 is non-rotatably attached to the tip side portion of the left output shaft 59a. Supported. The distal end portion of the right output shaft 59b of the scattering electric motor 59 is inserted into the right scattering case portion 47 through the opening of the right partition wall 51b, and the right scattering member 56 is non-rotatably attached to the distal end portion of the right output shaft 59b. Supported.

As shown in FIG. 6 , the left partition wall 51 a extends from the bottom wall portion 44 a toward between the motor main body of the scattering electric motor 59 and the left scattering member 55 . The inside of the left dispersion case portion 46 and the inside of the driving mechanism case portion 44 are partitioned by the left partition wall 51a. The right partition wall 51 b extends from the bottom wall portion 44 a toward between the motor body of the scattering electric motor 59 and the right scattering member 56 . The inside of the right dispersion case portion 47 and the inside of the driving mechanism case portion 44 are partitioned by the right partition wall 51b. Even if dust is generated inside the left scattering case portion 46 and the right scattering case portion 47, the dust hits the left partition wall 51a and the right partition wall 51b and is less likely to adhere to the scattering electric motor 59.

[Regarding the composition of the material tank]
As shown in FIGS. 1, 3, and 5, the material tank 30A includes a tank body 31 in which chemicals are stored, and a lid for opening and closing a material inlet 35 provided in the upper part of the tank body 31 so as to open upward. a body 36; As shown in FIGS. 3 and 5, a pair of left and right hinge mechanisms 70 are provided across the lid 36 and the tank body 31 to support the lid 36 on the tank body 31 so as to be swingable around the opening/closing axis P. there is The lid body 36 swings upward with respect to the tank body 31 around the opening/closing axis P along the width direction of the running body to open the material input port 35, and the tank body 31 moves around the opening/closing axis P. It is supported by the tank main body 31 so as to be able to swing up and down from the closed position to close the material inlet 35 by swinging downward against the tank body 31 . In this embodiment, the hinge mechanism 70 is provided across the front portion of the lid 36 and the front portion of the tank body 31, and the lid 36 is a front-opening type that opens toward the front of the tank body 31 with respect to the tank body 31. However, it is not limited to this. The hinge mechanism 70 may be provided over the rear portion of the lid body 36 and the rear portion of the tank body 31 , and the lid body 36 may be configured to open rearwardly of the tank body 31 with respect to the tank body 31 . Further, the hinge mechanism 70 is provided over the lateral side of the lid 36 and the lateral side of the tank body 31, and the lid 36 is configured to open laterally to the tank body 31 with respect to the tank body 31. good too.

[Regarding the configuration of the hinge mechanism]
As shown in FIGS. 8 and 9, the left and right hinge mechanisms 70 are separated from a pair of support portions 71 provided on the tank main body 31 and the lid body 36 in a state of being separated from the pair of support portions 71 on both lateral sides. and a hinge pin 75 inserted across a first pin hole 73 formed in each supporting portion 71 and a second pin hole 74 formed in each connecting portion 72. ing. The hinge pin 75 has an opening/closing axis P and connects the pair of connecting portions 72 to the pair of supporting portions 71 so as to be capable of swinging about the opening/closing axis P. As shown in FIG.

8, 9 and 10, the hinge pin 75 is formed in the intermediate portion of the hinge pin 75 and inserted into the first pin hole 73 and the second pin hole 74 to connect the connecting portion 72 to the support portion 71. It includes a connecting pin portion 76 that is pivotably connected, and retaining collar portions 77 that are formed on both end side portions of the hinge pin 75 relative to the connecting pin portion 76 . The outer diameter D2 of the retaining collar portion 77a on one end side of the retaining collar portions 77 on both end sides is larger than the outer diameter D1 of the connecting pin portion 76, and the first pin hole 73 and the second pin hole 74. is set larger than the hole diameter of The outer diameter D3 of the retaining collar portion 77b on the other end side of the retaining collar portions 77 on both end sides is larger than the outer diameter D1 of the connecting pin portion 76, and the first pin hole 73 and the second pin hole. It is set larger than the hole diameter of 74. In the present embodiment, the outer diameter D3 of the retainer collar portion 77b on the other end side is set larger than the outer diameter D2 of the retainer collar portion 77a on the one end side, but this is not restrictive. The outer diameters of the retainer flanges 77 on both ends may be set to the same size. The hinge pin 75 is prevented from coming out of the first pin hole 73 and the second pin hole 74 by the retainer flanges 77 on both ends. That is, when the hinge pin 75 tries to get out of the connection portion 72 and the support portion 71, the removal prevention flange portion 77 on the lower side in the removal direction of the removal prevention flange portions 77 on both end sides abuts the side surface of the connection portion 72 and the hinge pin is pulled out. Prevent 75 from getting out.

As shown in FIGS. 8, 9, and 10, one end of the hinge pin 75 is provided with a guide portion 80 that guides the retainer collar portion 77a on the one end side so as to enter the first pin hole 73 and the second pin hole 74. It is The guide portion 80 extends from the retainer collar portion 77 a at one end to the end 79 of the hinge pin 75 and has a smaller outer diameter toward the end 79 . A through hole 78 passing through this portion in the diametrical direction of the hinge pin 75 is provided at a portion of the hinge pin 75 corresponding to the retainer collar portion 77a on the one end side.

The connecting pin portion 76 is provided with a first connecting pin portion X and a second connecting pin portion Y which are distributed to one end side portion and the other end side portion of the connecting pin portion 76 . In this embodiment, the first linking pin portion X is provided at the end side portion of the linking pin portion 76 that is adjacent to the retainer collar portion 77a on the one end side and the guide portion 80 . The second linking pin portion Y is provided at the end side portion of the linking pin portion 76 that is adjacent to the retainer collar portion 77a on the other end side. The through hole 78 is provided so as to correspond only to the first linking pin portion X of the first linking pin portion X and the second linking pin portion Y. As shown in FIG. The through hole 78 extends to a portion corresponding to the guide portion 80 .

Of the pair of support portions 71, the outer support portion 71 positioned laterally outside of the material tank 30A, and of the pair of connection portions 72, the connection portion 72 corresponding to the outer support portion 71 are connected. A first connection target portion L1 is provided, and an inner support portion 71 of the pair of support portions 71 located laterally inward of the material tank 30A and a pair of connection portions 72 of the inner support portion A part to be connected having a connecting part 72 corresponding to the part 71 is defined as a second part to be connected L2. The first connection pin portion X and the second connection pin portion Y are divided into the first connection target portion L1 and the second connection target portion L2, and divided into the first connection target portion L1 and the second connection target portion L2. It can replace and mount to the 1st connection object part L1 and the 2nd connection object part L2.

That is, when the hinge pin 75 is attached to the pair of support portions 71 and the pair of connection portions 72 from the lateral outer side of the material tank 30A, the first connection pin portion X is attached to the second connection target portion L2. The second connection pin portion Y is attached to the first connection target portion L1 and connected to the support portion 71 in the first connection target portion L1. 72 are connected. When the hinge pin 75 is attached to the pair of support portions 71 and the pair of connection portions 72 from the laterally inner side of the material tank 30A, the first connection pin portion X is attached to the first connection object portion L1 to form the first connection portion L1. The support portion 71 and the connection portion 72 in the first connection target portion L1 are connected, and the second connection pin portion Y is attached to the second connection target portion L2 to connect the support portion 71 and the connection portion in the second connection target portion L2. 72.

The first connecting pin portion X is provided at one of the two end portions of the connecting pin portion 76 where the retainer collar portion 77a is located and where the guide portion 80 is located. The connecting pin portion Y is provided at one of both end portions of the connecting pin portion 76 where the retainer collar portion 77b on the other end side is located. The through hole 78 is provided so as to correspond only to the first linking pin portion X of the first linking pin portion X and the second linking pin portion Y. As shown in FIG. The through hole 78 is provided so as to extend to a portion corresponding to the guide portion 80 .

When the retainer flange 77a on the one end side passes through the first pin hole 73, the retainer collar 77a is elastically deformed toward the reduced diameter side due to the pressure of the support portion 71 against the retainer collar 77a. The through hole 78 allows the outer diameter to be smaller than the hole diameter of the first pin hole 73 . When the retainer flange 77a on the one end side passes through the second pin hole 74, the retainer collar 77a is elastically deformed to the reduced diameter side due to the pressure of the connection portion 72 against the retainer collar 77a, and the retainer collar 77a is removed. The through hole 78 allows the outer diameter to be smaller than the hole diameter of the second pin hole 74 . That is, when the retainer collar portion 77a on the one end side passes through the first pin hole 73, the support portion 71 presses the retainer collar portion 77a, and the retainer collar portion 77a on the one end side passes through the second pin hole 74. , the connecting portion 72 presses the retainer collar portion 77a. Then, of the portion Z of the hinge pin 75 having the through hole 78, the portion on the side closer to the retainer collar portion 77b on the other end side is used as the portion on the fulcrum side of the diameter reduction deformation, and the portion Z of the portion Z The portion near the end 79 on the side opposite to the retainer collar portion 77b is used as the portion on the fulcrum side of the diameter reduction deformation, the portion Z undergoes diameter reduction deformation (elastic deformation), and the retainer collar portion 77a is reduced in diameter. elastically deforms to the side.

As shown in FIGS. 9 and 10, the end 81 of the hinge pin 75 where the retainer flange 77b is located on the side opposite to the side where the guide portion 80 is located is formed into a flat surface. A portion of the connecting pin portion 76 between the through hole 78 and the retainer collar portion 77b is configured to have a cross-sectional shape. The hinge pin 75 is entirely made of resin.

When attaching the lid body 36 to the tank body 31, the hinge mechanism 70 is assembled according to the following assembly procedure.
In this embodiment, the first linking pin portion X is attached to the second connection target portion L2, and the second linking pin portion Y is attached to the first connection target portion L1. It may be attached to the first connection target portion L1, and the second connection pin portion Y may be attached to the second connection target portion L2.
That is, the pair of support portions 71 are positioned between the pair of connecting portions 72, and the tank body 31 and the lid body 36 are positioned so that the center of the first pin hole 73 and the center of the second pin hole 74 match. Position adjustment of the lid 36 with respect to the tank main body 31 is performed so that it is positioned. When the center of the first pin hole 73 and the center of the second pin hole 74 are aligned, the tip of the guide portion 80 of the hinge pin 75 is inserted into the second pin hole 74 of one of the pair of connecting portions 72 . put in. When the tip of the guide portion 80 enters the second pin hole 74, the end 81 of the flat surface is pushed. Then, the retaining collar portion 77a on the one end side is guided by the guide portion 80 and enters the second pin hole 74, and the outer diameter of the retaining collar portion 77a is reduced by the compression operation of the retaining collar portion 77a by pressing the connecting portion 72. becomes smaller than the hole diameter of the second pin hole 74 , and the retainer flange 77 a passes through the second pin hole 74 . When the retainer flange 77 a passes through the second pin hole 74 , the retainer collar 77 a is guided by the guide portion 80 and enters the first pin hole 73 of one support portion 71 . Then, the outer diameter of the retaining collar portion 77a becomes smaller than the hole diameter of the first pin hole 73 due to the contraction operation of the retaining collar portion 77a by the pressing force of the support portion 71, and the retaining collar portion 77a becomes smaller than the hole diameter of the first pin hole 73. Pass through hole 73 . Further, the end 81 of the flat surface is pushed. Then, the distal end of the guide portion 80 enters the first pin hole 73 of the other support portion 71, the retainer collar portion 77a is guided by the guide portion 80 and enters the first pin hole 73, and the pressure of the support portion 71 The outer diameter of the retaining collar portion 77a becomes smaller than the hole diameter of the first pin hole 73 by the warping operation of the retaining collar portion 77a, and the retaining collar portion 77a passes through the first pin hole 73. After the retainer collar portion 77 a passes through the first pin hole 73 , the retainer collar portion 77 a enters the second pin hole 74 of the other connecting portion 72 . Then, the outer diameter of the retaining collar portion 77a becomes smaller than the hole diameter of the second pin hole 74 due to the contraction operation of the retaining collar portion 77a by pressing the connecting portion 72, and the retaining collar portion 77a becomes smaller than the hole diameter of the second pin hole 74. pass through hole 74; The retainer flange 77 a passes through the second pin hole 74 and protrudes laterally outside of the other connecting portion 72 . When the retainer collar 77a protrudes laterally outside of the other connecting portion 72, the outer diameter of the retainer collar 77a becomes the initial size due to the elastic restoration of the retainer collar 77a. The outer diameter D1 is larger than the hole diameters of the first pin hole 73 and the second pin hole 74, and the stopper flanges 77 located on both lateral sides of the pair of connecting parts 72 provide a stopper function. As a result, the hinge pin 75 does not come off from the pair of support portions 71 and the pair of connecting portions 72 . A connecting pin portion 76 is positioned across the pair of connecting portions 72 and positioned across the pair of support portions 71 , and the pair of connecting portions 72 are pivotably connected to the pair of support portions 71 by hinge pins 75 . Although the strength of the first linking pin portion X to which the through hole 78 corresponds is lower than the strength of the second linking pin portion Y to which the through hole 789 does not correspond, the first linking target portion L1 and the second linking target In the portion L2, the connecting portion 72 and the supporting portion 71 in the first connecting portion L1 or the second connecting portion L2 to which the second connecting pin portion Y is attached are firmly connected by the second connecting pin portion Y, and the lid A body 36 is firmly supported by the tank body 31 . .

In this embodiment, the hinge pin 75 is configured to be weaker than the tank body 31 and the lid body 36 . When an unreasonable external force is applied to the tank body 31 and the lid 36, the hinge pin 65 is damaged, and damage to the tank body 31 and the lid 36 is prevented.
Although the hinge pin 75 of this embodiment is made of resin, it is not limited to this. For example, the portion of the hinge pin that has an elastically deformable retainer flange may be made of a spring plate material. In this embodiment, the hinge pin 75 is arranged such that the portion of the connecting pin portion 76 located between the through hole 78 and the retainer collar portion 77b has a cross-shaped vertical cross section, and the retainer collar portion Although the shape of 77b in the direction along the opening/closing axis P is circular, it is not limited to this. For example, the vertical cross-sectional shape of the connecting pin portion 76 may be circular, or polygonal such as quadrangular or hexagonal. Further, the shape of the retainer collar portion 77b in the direction along the opening/closing axis P may be a cross shape or a polygonal shape such as a square or a hexagon.

[Another embodiment]
(1) In the above-described embodiment, the first connection pin portion X and the second connection pin portion Y are replaced with the first connection target portion L1 and the second connection target portion L2, and the first connection target portion L1 and the second connection target portion L2 Although it is configured to be attachable to the connection target portion L2, it is not limited to this. It may be attached to the 2-connection target portion L2.

(2) In the above-described embodiment, the hinge mechanism 70 includes a pair of connecting portions 72 and a pair of supporting portions 71, and the supporting portion 71 is positioned between the pair of connecting portions 72. Not exclusively. For example, the connecting portion 72 may be between the pair of support portions 71 . Alternatively, a pair of connecting portions 72 and a single supporting portion interposed between the pair of connecting portions 72 may be provided.

(3) In the above-described embodiment, an example was shown in which only one of the retaining flanges 77 on both ends is elastically deformable, but the present invention is not limited to this. Both of the retainer flanges 77 on both ends may be elastically deformable. Guide portions 80 may be provided at both ends of the hinge pin 75 .

(4) In the above-described embodiment, an example was shown in which the agricultural material supply device 30 was equipped with a riding-type rice transplanter capable of planting 8 rows. It may be one that is equipped on an aircraft.

(5) In the above-described embodiment, an example is shown in which the agricultural material supply device 30 is configured to supply chemicals, but this is not the only option. For example, it may supply various agricultural materials such as seeds and fertilizers.

INDUSTRIAL APPLICABILITY The present invention can be applied to an agricultural material supply device that supplies various agricultural materials such as seeds and fertilizers, as well as chemicals.

30A Material tank 30B Extraction supply part 31 Tank main body 31b Storage part 32 Cylindrical part 33 Reinforcement rib 33a Contact part 35 Material input port 36 Lid 40 Extraction supply case 41 Connecting part 70 Hinge mechanism 71 Supporting part 72 Connecting part 73 First pin Hole 74 Second pin hole 75 Hinge pin 76 Connecting pin portion 77 Retaining collar portion 77a Retaining collar portion on one end side 79 End 80 Guide portion 81 End L1 First connection target portion L2 Second connection target portion D1 Outside the connection pin portion Diameter D2 Outer diameter of retainer flange P Open/close shaft center X 1st connecting pin portion Y 2nd connecting pin portion

Claims (6)

a material tank for storing agricultural materials to be supplied to a field; and a retrieval and supply unit connected to the material tank to retrieve the agricultural material from the material tank and supply the retrieved agricultural material to the field,
The material tank includes a tank main body, a cover supported by the tank main body so as to be swingable about an opening/closing axis and opening and closing a material input port of the tank main body, and the tank main body and the cover being provided. and a hinge mechanism for swingably supporting the lid on the tank body,
The hinge mechanism includes a support portion provided in the tank body and formed with a first pin hole, a connecting portion provided in the lid body and formed with a second pin hole, the first pin hole and the a hinge pin that is inserted into the second pin hole and has the opening/closing axis, and that connects the connecting portion to the supporting portion in a swingable manner;
a connecting pin portion formed in an intermediate portion of the hinge pin and inserted into the first pin hole and the second pin hole to connect the connecting portion to the support portion so as to swing; The hinge pin is formed at portions on both end sides of the connecting pin portion of the hinge pin and has an outer diameter larger than the outer diameter of the connecting pin portion, and extends from the first pin hole and the second pin hole. and a retaining collar that prevents the slip-out of the
When passing through the first pin hole and the second pin hole, the retaining flange has an outer diameter larger than the hole diameter of the first pin hole and the hole diameter of the second pin hole. configured to be elastically deformable so as to become smaller ,
The retainer collar has a guide portion in an inclined posture with a smaller diameter toward the end of the hinge pin, and penetrates the hinge pin in a diametrical direction in a region extending from a position overlapping the guide portion to the connecting pin portion. Agricultural material supply device in which a through hole is formed . Only one of the retaining flanges on both ends is configured to be elastically deformable,
2. The agricultural material supply device according to claim 1, wherein the end of the hinge pin on the side where the retaining collar portion on the other end side of the retaining collar portions on the both end sides is located is formed in a flat surface shape. A pair of the support portions are provided, and a pair of the connection portions are provided,
a first connection target portion having one support portion of the pair of support portions and one connection portion corresponding to the one support portion of the pair of connection portions; a second connection target part having the other support part of the pair of connection parts and the other connection part corresponding to the other support part of the pair of connection parts,
A first linking pin portion and a second linking pin portion which are divided into the first linking target portion and the second linking target portion and are mounted on the first linking target portion and the second linking target portion are connected to the linking pin. are divided into one end side part and the other end side part of the part,
2. The agricultural material supply device according to claim 1 , wherein the through hole is provided corresponding only to the first linking pin portion of the first linking pin portion and the second linking pin portion. The agricultural material supply device according to any one of claims 1 to 3 , wherein the hinge pin is made of resin. The tank body has a storage part in which agricultural materials are stored, and a cylindrical part extending downward from a lower part of the storage part and connected to the extraction supply part,
The take-out and supply unit includes a take-out and supply case for taking in agricultural materials from the material tank, and an annular connection part formed in the upper part of the take-out and supply case and fitted inside the cylindrical part,
The agricultural material supply device according to any one of claims 1 to 4 , wherein the cylindrical portion is integrally formed with the storage portion. A reinforcing rib is formed on the inner surface side of the cylindrical portion,
6. The agricultural material supply device according to claim 5 , wherein a contact portion is formed in a lower portion of said reinforcing rib to contact said connection portion from above.

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