JP2010148388A - Belt conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt conveyor not only holding and conveying a material to be conveyed such as crops without crushing the material, but also conveying the material in an attitude-regulated state within a conveying and supporting interval of a conveying path formed by a flat belt part. <P>SOLUTION: The belt conveyor forms the conveying path 40 for holding and conveying the crops by providing belt-shaped conveying belts 10 wound on driving pulleys 45 and driven pulleys 43 in parallel in the right and left direction. The conveying belt 10 is constituted by providing a flat belt part 51 having a length and width for forming the conveying path 40, elastic holding protrusions 52 for elastically holding the holding positions of the crops and formed along the belt direction on the conveying surface side of the flat belt 51, and guide protrusions 31 formed at the back surface side of the flat belt part 51 along the installation positions of the elastic holding protrusions 52, and to be inserted and fitted into the pulley groove 48 in a recessed groove shape formed at the outer periphery of the driving pulley 45. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a belt conveyance device for nipping and conveying an object to be conveyed such as a crop.

2. Description of the Related Art Conventionally, as shown in Patent Document 1, a conveyance unit (clamping conveyance device) that is mounted on a traveling machine body having a traveling device in an inclined posture and clamps and conveys a crop from the lower side to the rear upper side is already known. The transport unit disclosed in Patent Document 1 is configured such that a flat belt-shaped transport belt is wound around a driving pulley and a driven pulley, and the transport belt is paired on the left and right sides and is opposed to each other in a front and rear inclined posture. Thus, a conveyance path for nipping and conveying the crop is formed, and the crop (non-headed leaf vegetable) scraped from the start end is nipped and conveyed, discharged from the terminal end, and stored in the storage bucket.
Japanese Patent No. 2898629

The transport unit of the harvesting machine shown in Patent Document 1 can transport a crop sandwiching portion with a transport belt composed of a pair of flat belts without causing a leakage. However, in the crop, the leaf stem part exposed upward from the pinched part by the narrow flat belt loses its lateral support during the inclined conveyance process and tilts or bends, resulting in damage to the leaf stem part at the conveyance end part. It has the disadvantage that the quality of the crop is easily impaired at the time of harvesting, such as being generated and being stored in a storage bucket with the conveyance posture disturbed, and suppressing the fluctuation of the leaf stem part to prevent deterioration of the quality In addition, there are problems such as small turning of the aircraft and difficulty in speeding up the work.
In addition, in order to prevent the leaf stem from tilting to the side, for example, if it is attempted to provide a strip-shaped guide member along the upper side of each flat belt, in this case, the leaf stem is tilted sideways. However, the leaf stem part is delayed due to resistance such as friction on the leaf surface due to friction and resistance with the guide member, and wet leaves being in close contact with the plate surface. This causes problems such as the crop tilting toward the side and disturbing the transport posture.

  The belt conveying device of the present invention for solving the above-mentioned problems is as follows. First, a belt-like conveying belt 10 wound around a driving pulley 45 and a driven pulley 43 is provided on the left and right sides to clamp and convey the crop. In the belt conveying apparatus for forming the conveying path 40, a flat belt portion 51 having a length and a width for forming the conveying path 40 through the conveying band 10, and a crop along the belt direction on the conveying surface side of the flat belt portion 51. An elastic pinching protrusion 52 is provided for elastically pinching the pinching portion with respect to the belt, and a recess formed on the outer periphery of the drive pulley 45 along the installation portion of the elastic pinching protrusion 52 on the back side of the flat belt portion 51. A feature is that a guide protrusion 31 to be inserted into the groove-like pulley groove 48 is provided.

  Secondly, with respect to the conveyance device unit formed by winding the conveyance band 10 around the drive pulley 45 and the driven pulley 43, the conveyance terminal side of the other conveyance device unit provided opposite to the conveyance device unit is shifted to the downstream side in the conveyance direction. It is characterized by doing.

  Thirdly, an auxiliary conveyance body 37 is provided at the end portion of the conveyance path 40 to receive the end portion of the crop for which nipping conveyance is released and convey the crop to the rear.

  Fourthly, the conveyance path 40 of the conveyance unit 9 for nipping and conveying the crop is arranged on the left and right, and the start end side can be adjusted to be expanded to the left and right with the end side of the left and right conveyance paths 40 supported at a fixed position. It is characterized by supporting.

  The belt conveyance device according to the present invention has the following effects. According to the first aspect of the present invention, the transport band that is formed on the wide flat belt portion and is wound around the driven wheel in a state where the guide protrusion is fitted in the pulley groove of the drive pulley is the opposite of the transport band that is provided oppositely. The conveyance path is formed while preventing the belt from slipping, and the clamping area of the crop is elastically held between the opposing elastic clamping protrusions, so that the crop is softly held without being crushed or damaged. It is possible to carry it reliably. Further, the non-clamping portion of the crop can be transported in an orderly manner in a state in which the posture to the side is regulated within the transport support interval of the transport path formed by the opposed flat belt portions.

  According to the second aspect of the present invention, the transporting device unit in which the transport belt is wound around the drive pulley and the driven pulley is arranged so that the end of one transporting device is on the transporting direction side with respect to the end of the other transporting device. By disposing, the installation position of the drive pulley or the like is shifted at the end of the transport device unit to prevent strong clamping, and thus crop damage can be prevented. Further, the crop can be sent to the next process of the storage unit or the like while regulating the posture in a state where the nipping conveyance by the opposite conveyance band is released and the conveyance support by one conveyance band is continued.

  According to the invention of claim 3, the auxiliary transport body is provided at the end of the crop where the nipping transport is released by providing the auxiliary transport body that receives the end of the crop and auxiliaryly feeds it at the end of the transport path. Can be sent along the auxiliary transport locus, so that the feed posture can be sent while being regulated and guided toward the next process such as the accommodating portion located below.

  According to the fourth aspect of the present invention, the conveyance path arranged on the left and right of the conveyance unit is adjusted so that the start end side is widened to the left and right while the terminal end side is supported at a fixed position, thereby starting the nipping conveyance of the left and right conveyance paths. The width can be adjusted and nipping and conveying can be performed according to the crop conveyance start position, and the crops nipped and conveyed by the left and right conveyance paths can be gathered at the conveyance end position and discharged and conveyed.

An embodiment of the present invention will be described with reference to the drawings. The harvesting machine 1 according to this embodiment is a harvesting machine for soft vegetables that is suitable for harvesting mainly non-headed leafy vegetables such as spinach, komatsuna and small leek (hereinafter simply referred to as crops). 2 is equipped with a harvesting device 3 that scrapes, conveys and collects crops from the field ground.
In this traveling machine body 2, the body frame 4 is configured as a crawler-type traveling device 5 to be described later, and the harvesting device 3 is supported by the body frame 4 in a front, back, and rear high-tilt posture, and is driven on both sides of the traveling device 5. Batteries 7 and 7 having substantially the same weight are installed at the installation position of the wheel 6.

The traveling device 5 has a driving wheel 6 as a large-diameter wheel and is disposed on the rear side so as to be driven by the rotational power of a motor 8 fed from a battery 7. The battery 7 also supplies power to the motor 8a for the harvesting device 3, and drives the transport band 10 and the cutter 11 of the transport unit 9 constituting the harvesting device 3 via a transport transmission mechanism 12 described later.
The body frame 4 is provided with a bifurcated handle 13 at the rear, extends rearward along the lower part of the transport unit 9, and controls the motors 8 and 8a such as forward / reverse rotation and rotational speed of the grip unit. Various operation switches 15, 15 a, 15 c... Are provided via a control box 16.
As a result, the harvesting machine 1 adjusts the motor 8 forward / reversely and rotationally to perform forward / backward movement and traveling speed adjustment operation of the machine body, and rotationally adjusts the motor 8a to perform conveyance speed adjustment operation. The harvesting operation can be performed by selecting an appropriate traveling speed and conveying speed.

  The configuration of each part will be described below. First, the traveling machine body (vehicle body) 2 and the traveling device 5 will be described in detail with reference to FIGS. This traveling machine body 2 pivotally supports a body frame 4 so as to be rotatable about a drive shaft 6a of the drive wheel 6 via a shaft support portion 4a. That is, the machine body frame 4 is attached to the upper part of the drive shaft 6a slightly above the drive shaft 3a by a mounting structure to be described later, and the front side of the device frame 3a via the rotation restriction support mechanism 17 is attached. By supporting on the traveling frame 19 of the traveling device 5, the harvesting device 3 is provided in an inclined posture of front low and high.

  The body frame 4 has the control box 16 and the motor 8 arranged vertically at the rear of the frame supported rearward from the drive shaft 6a, and the drive shaft from the motor shaft 20 via a transmission case 21 having a transmission mechanism. 6a is configured to transmit. And as shown in FIG. 3, the body frame 4 is formed in the right and left straddling the upper part of the traveling apparatus 5 so that the battery mounting base 22 may be brought close to the both side ends of the drive shaft 6a. Thus, the heavy left and right batteries 7 are stably installed at appropriate positions slightly on the front side on both sides of the drive shaft 6a, and are also used as weights for balancing the weight of the harvesting device 3 supported by the machine frame 4. The position of the center of gravity of the harvesting device 3 is determined in the vicinity of the rotation restriction support mechanism 17 and the traveling device 5 is weighted.

The harvesting machine 1 configured with the machine frame 4 as described above drives the vertical rotation of the harvesting device 3 according to the unevenness of the ground when the harvesting device 3 travels while grounding the front end of the harvesting device 3 to the ground. Perform smoothly around the shaft 6a. Similarly, the traveling device 5 also rotates up and down around the drive shaft 6a according to the unevenness of the ground surface, so that the single rotation of the harvesting device 3 and the traveling device 5 can be allowed without interfering with each other. it can. As a result, the harvester 1 can travel with reduced body vibration, and can harvest crops with high performance.
Further, the body frame 4 formed by forming the left and right battery mounting tables 22 in an inverted U shape from above and the travel device 5 by crotch has a feature that the frame rigidity can be increased by a simple bending structure.

As shown in FIGS. 1 and 2, the traveling device 5 has a rubber-made endless belt (crawler) 25 wound around the driving wheel 6 and the driven wheel 23. In this embodiment, the driving wheel 6 has a large diameter. The driven wheel 23 is about half the diameter of the drive wheel 6 and is pivotally supported at the tip of the traveling frame 19 pivotally supported on the drive shaft 6a via the pivotal support 19a. is doing.
Thereby, the traveling device 5 can stretch the crawler 25 in a triangular shape with an acute angle in the side view, the small-diameter driven wheel 23 side at the central portion of the left-right width of the device frame 3a, and the conveyance unit 9 It is possible to approach the lower front as much as possible.

And while increasing the ground contact length of the crawler 25 in the front-rear direction, the overall length of the harvesting machine 1 is suppressed and the machine body is compactly gathered.
In addition, the crawler 25 that enters the lower portion of the apparatus frame 3a while increasing the contact length is not provided with a plurality of traveling devices 5 on the left and right sides of the machine body unlike the conventional one. The central portion can be stably supported by a wide ground surface.
And the right-and-left balance of the airframe is good, and the smooth driving | running | working which suppressed the rocking | fluctuation in the front-back direction is enabled.

In the harvesting machine 1 configured as described above, since the transport unit 9 of the harvesting device 3 can be arranged close to the upper inclined surface of the crawler 25, the transport unit 9 and the traveling machine body 2 can be arranged. The structure is compact and excellent in handleability as close as possible, and the aircraft is stably supported by the single-wheeled traveling device 5 in which one crawler 25 is stretched, so the steering operation structure is omitted. However, it is possible to provide the harvester 1 that can easily perform a small turn at low cost.
Moreover, since the inclination of the conveyance part 9 can be made moderate, it can convey orderly without disturbing the conveyance attitude | position of a crop, can arrange | position the accommodation attitude | position, and can make it easy to perform a harvesting operation. Further, there is a feature that the installation and use of the conveying band 10 that is wide in the vertical direction as described later can be suitably performed while preventing troubles such as belt detachment and large deflection.

As shown in FIGS. 1 to 3, the rotation restricting support mechanism 17 is attached to and supported by the middle of the traveling frame 19 in the horizontal direction, and is slidably fitted to both ends of the support rod 29. And has a connecting rod 31 standing upright. Both the left and right connecting rods 31 are inserted and installed between the support rod 29 and the support portion 30 with spring members 32 made of coil springs, with their tips inserted into the support portions 30 provided on both sides of the harvesting device 3. ing.
As a result, the rotation restriction support mechanism 17 arranged on the left and right can support the left and right sides of the device frame 3 a with the buffer structure via the support portion 30.

The harvesting machine 1 including the rotation restriction support mechanism 17 having the above-described configuration supports the weight of the harvesting device 3 by the traveling device 5 through the drive shaft 6a and the rotation restriction support mechanism 17, and supports the support rod 29 and The shock load applied to the support portion 30 can be buffered and supported by the spring member 32.
Therefore, the vertical rotation of the harvesting device 3 and the traveling device 5 with the drive shaft 6a as a fulcrum can be smoothly performed while suppressing overload of each component member and large vibrations and noises.
Further, the rotation restricting support mechanism 17 in the illustrated example has a plurality of pin holes 33 formed on the upper side of the connecting rod 31, and by inserting the stopper pin 35 into the selected pin hole 33, the support portion 30 and the stopper The pin 35 is brought into contact with the device frame 3a and the traveling device 5 so that a large separation with the drive shaft 6a as a fulcrum is regulated and the regulation amount can be adjusted.

  As described above, the harvesting machine 1 that constitutes the traveling machine body 2 has the traveling device 5 disposed below the width of the harvesting device 3 in a plan view, that is, substantially at the center of the left-right width of the conveyance unit 9 including the left and right conveyance paths 40. The battery 7 is disposed on both sides of the drive wheel 6 so as to be close to the crawler 25 and is not protruded larger than the apparatus width. As a result, the harvesting machine 1 makes the width on the traveling machine body 2 side, that is, the machine body width determined by the left and right batteries 7 smaller than the width of the bifurcated handle 13 disposed rearward and upward. As a result, the harvesting machine 1 has a good balance between left and right and is lightweight while maintaining front and rear running stability. Therefore, the dredging and soft ground can be prevented from sinking, and driving with excellent maneuverability can be easily performed. It can be carried out.

  Next, the harvesting apparatus 3 will be described with reference to FIGS. The harvesting device 3 includes a transport unit 9 that transports crops from the ground side toward the rear, and a storage unit 36 that stores crops at the end of the transport unit 9. The conveyance part 9 of the example of illustration is equipped with the cutter 11 which cuts or digs up the crop currently planted on the field ground as a pre-processing part in the conveyance start end side. In addition, the transport unit 9 is provided with an auxiliary transport body (original transport body) 37 made of a rotating brush body orthogonal to the transport direction as a post-processing section on the transport end side, and a storage section below the auxiliary transport body 37. 36 is provided on the handle 13.

  In the illustrated example of the accommodating portion 36, left and right ends of a receiving member 39 having a net-like or slat-like flexibility are removably attached to left and right accommodating support rods 38 projecting rearward from the handle 13. It has a configuration. As a result, the storage unit 36 can support the receiving member 39 on the storage support rod 38 with a curved surface, and the crops discharged and fed from the transport unit 9 and the auxiliary transport body 37 are collected in a fixed posture. Can be accommodated in a state.

  The transport unit 9 of the harvesting device 3 can have an interval equal to a standard width in which crops for two rows on the left and right sides are planted within the device width, and the crops on the left and right are spread over a predetermined length. A conveyance path 40 for nipping and conveying toward the rear is configured. This conveyance path 40 is formed by disposing the conveyance bands 10 having the cross-sectional structure shown in FIGS. 3 and 10 so as to oppose left and right, and the four conveyance bands 10 forming the left and right conveyance paths 40 are L-shaped in a sectional view. The outer transport frames 41 and 41 and the inner transport frames 42 and 42 having a shape are belted by the same mechanism, so that the outer transport section 9a and the inner transport section 9b of the unit structure are simplified and inexpensive. Yes.

That is, the outer transport unit 9a and the inner transport unit 9b support the driven pulley 43 and the drive pulley 45 with respect to the upper part of the horizontal plate of each transport frame so that the front and rear ends of the transport pulley 43 and the drive pulley 45 can rotate in the vertical axis. A plurality of guide pulleys 46 having a belt support interval are supported so as to be able to rotate in the vertical axis so that the belt is tensioned.
At this time, the guide pulley 46 is erected so as to make rolling contact with the back surface of the transport band 10 on the transport path 40 side, and the guide pulleys 46 provided on the outer transport unit 9a and the inner transport unit 9b may be arranged so as not to face each other. desirable. The driven pulley 43, the drive pulley 45, and the guide pulley 46 are formed with a pulley groove 48 that guides a guide protrusion 47, which will be described later, of the transport band 10 into a predetermined position on the outer periphery thereof.

  The transport belt 10 is a belt body having a vertical standing rigidity (straightness) while having flexibility, and is a length that forms a transport path 40 as shown in FIG. 1, FIG. 3, FIG. The flat belt portion 51 of the embodiment has a width that sandwiches or supports substantially the entire main portion of the leaf from its root side, for example, for suitably transporting small green onions. Yes. The flat belt portion 51 is provided with an elastic pinching protrusion 52 at the lower portion on the surface side thereof so that the root side of the crop (leek) can be properly pinched while preventing slipping and crushing. This elastic clamping protrusion 52 is formed of sponge, cushioning rubber, air tube or the like, and a guide protrusion 47 is provided on the back side of the flat belt portion 51 so as to face the installation position of the elastic clamping protrusion 52. .

As described above, the conveyance belt 10 is provided with the flat belt portion 51 and the elastic pinching protrusions 52 that elastically pinch the clamping portion for the crop along the belt direction on the conveyance surface side of the flat belt portion 51. In addition, a guide protrusion 47 is provided on the back surface side of the flat belt portion 51 so as to be fitted into a concave groove-shaped pulley groove 48 formed on the outer periphery of the drive pulley 45 and the like along the installation portion of the elastic clamping protrusion 52. ing.
Therefore, the conveyance belt 10 in which the guide protrusion 47 is inserted into the pulley groove 48 of the drive pulley 45 is softly held by the elastic holding protrusions 52 without crushing the crop holding portion, so that the conveyance is ensured. It can be carried out. Further, there is a feature that the non-clamping portion of the crop is transported in an orderly manner in a state in which the posture to the side is regulated within the transport support interval of the transport path 40 formed by the flat belt portion 51 facing each other.

  As shown in FIGS. 8 to 10, the outer conveyance frame 41 is formed such that the vertical plate portion is longer in the vertical direction than the vertical plate portion of the inner conveyance frame 42. The outer transport section 9a and the inner transport section 9b that form a pair have a hook-shaped connection frame 53a and a plate-shaped connection frame 53 arranged on the lower side of each of the outer transport frame 41 and the inner transport frame 42. Are connected to form a unitary unit structure, and the left and right transport parts 9c and 9d of the unit structure forming the left and right transport paths 40 are formed to form the device frame 3a of the harvesting device 3 as a whole. ing.

  The left transport unit 9c and the right transport unit 9d are attached and supported so that they can be detachably mounted and slidable in the lateral direction on the front and rear of the upper body frame 4 by means of a horizontal connecting rod 54 by means of a horizontal connecting rod 54. At this time, the inner transport unit 9b is opposed to the rear by displace- ing the installation position from the outer transport unit 9a toward the rear. Thereby, the conveyance path 40 can be formed in a state where the driven pulley 43 and the drive pulley 45 of both are shifted from each other, and strong clamping between the conveyance start end side and the termination end side by the conveyance bands 10 and 10 is prevented. Can be prevented from being damaged.

Further, the end of the inner transport unit 9b located adjacent to the inner sides of the left and right transport paths 40 is positioned on the side of the storage unit 36 behind the end of the outer transport unit 9a, so that the crop is released from the nipping and transporting of both. After that, it is possible to reliably guide the discharge toward the storage unit 36 while restricting the tilting of the crop toward the inside of the machine body while the conveyance support by the conveyance band 10 of the inner conveyance unit 9b is continued.
Accordingly, two points in FIG. 1 are combined with the original feed action of the crop by the auxiliary transport body 37 in a state where the crops are not separated from each other at the end of the left and right transport paths 40 and 40 in an orderly manner. There is a feature that it can be accommodated while being stacked in an orderly manner in the receiving member 39 as in the crop trajectory indicated by the chain line.

  As shown in FIGS. 1, 3, and 10, the left transport unit 9 c and the right unit are configured such that a pair of outer transport unit 9 a and inner transport unit 9 b are connected and unitized to form a transport path 40. The transport unit 9d is configured such that the rear parts of both frames are connected by a rear connection part (movable connection part) 56 having a hinge structure on the vertical axis in a state where the inner transport frames 42 are arranged close to each other on the left and right. An interval adjusting mechanism 57 is provided on the front side of the left conveying portion 9c and the right conveying portion 9d to adjust the distance between the left and right sides. As shown in FIG. 4, the distance adjusting mechanism 57 is slidably fitted to an adjustment support rod 59 provided on the frame of the other right transport unit 9d, for example, on a pipe 58 provided on the frame of one left transport unit 9c. In addition, an adjustment bolt 61 is provided on the pipe 58.

Accordingly, the adjustment bolt 61 of the interval adjusting mechanism 57 is loosened when it is desired to increase the interval between the left and right transport paths 40, 40 from the minimum interval shown in FIG. When the interval fixing is released, the left conveying portion 9c and the right conveying portion 9d can be pivoted outward around the rear connecting portion 56, and the positioning fixing is performed by fixing the adjusting bolt 61 at a predetermined conveying path interval. It can be done easily.
In other words, the transport unit 9 having the left transport unit 9c and the right transport unit 9d having the transport path 40 adjustable to the left and right can be adjusted to expand the front side to the left and right while the rear side is supported at a fixed position. As a result, it is possible to reliably squeeze the crops in the left and right rows with different nipping and transport start positions, and to securely perform the nipping and transporting, and to gather the crops nipped and transported in the left and right transport paths 40 at a fixed position at the transport end. There is an advantage that post-processing work such as housing can be facilitated.

  Next, the transmission structure of the harvesting device 3 that enables the harvesting operation as described above will be described with reference to FIGS. 4 and 6 to 10. The transport transmission mechanism 12 is installed in the lower rear part of the transport unit 9, and the motor 8 is installed downward on a motor base 41 a that projects from the left outer transport frame 41, and is provided on the motor shaft. The drive sprocket 62 is input to the input sprockets 64 provided in the inner and outer transport parts 9b and 9a via the chain 63, and the transport belts 10 are rotated and transmitted.

The input sprocket 64 is provided on the lower side of the input shaft 65 that is pivotally supported by each of the transport frames of the left transport unit 9 c and the right transport unit 9 d and the connection frame 53, and is installed on the connection frame 53. The automatic chain tensioning mechanism 66 is rotated and transmitted by a tension sprocket 66 a of the automatic chain tensioning mechanism 66 and a chain 63 wound around the drive sprocket 62.
As shown in FIG. 9, each input shaft 65 is provided with an intermediate sprocket 67 at the top, and each intermediate sprocket 67 is a pulley sprocket included in each drive pulley 45 that is pivotally supported at the rear of each corresponding transport frame. Each conveyor belt 10 is driven to rotate by wrapping a chain 69 around the chain 68 for transmission. Therefore, even when the conveyance path interval is changed between the left conveyance unit 9c and the right conveyance unit 9d, the conveyance band 10 can be driven without adjusting the chain tension. The belt tension of the transport belt 10 can be easily adjusted by adjusting the driven pulley 43 in advance.

  The automatic chain tensioning mechanism 66 slidably supports a tension sprocket 66a in a long hole 71 formed in the connection frame 53, and is biased in the chain tension direction by tension springs 72 arranged on the left and right. As a result, each drive pulley 45 is rotationally driven via the respective pulley sprocket 68 to turn each transport belt 10 in the transport direction, and when the chain 63 is loosened, the automatic chain tensioning mechanism 66 The tension sprocket 66a automatically performs chain tensioning. Further, the tension sprocket 66a automatically corrects the loose displacement of the chain 63 when the left and right transport belts 10 are expanded through the distance adjusting mechanism 57 with the rear connecting portion 56 as a fulcrum.

Further, the transport transmission mechanism 12 transmits the left and right transport belts 10 by transmitting the left and right auxiliary transport bodies 37 from gears 73 provided below the pulley sprocket 68 of the drive pulley 45 of the left and right outer transport sections 9a. Conveyance adapted to the interval adjustment can be performed.
That is, the auxiliary transport body 37 is rotatably supported via the shaft support portion at the rear of each of the outer transport frame 41 and the inner transport frame 42 of the left transport portion 9c and the right transport portion 9d that make a pair of rotation shafts 74. In addition, a feed member 76 is provided in the middle of the rotation shaft 74 so as to face downward corresponding to the transport path 40, and a gear 77 to be engaged with the gear 73 is provided on the outer side.
With this configuration, the left and right auxiliary transport bodies 37 support the crop root from the end of the transport belt 10 when the rotation shaft 74 rotates through the gear 73 and the gear 77 as the drive pulley 45 rotates. Then, it is possible to take over and convey and guide the accommodation to the accommodation portion 36.

Further, the former feed member 76 in the illustrated example is a circular brush body in which a large number of wire rods are radially planted around the rotation shaft 74. As a result, the tip of the brush wire comes into contact with the lower end of the crop without causing any slip, and is separated from the subsequent crop so as to push up the lower end of the crop at the end of the transport belt 10, while preventing the natural fall, While drawing the arc trajectory, it is possible to feed and guide the storage unit 36 in an orderly and reliable manner. The original feed member 76 is not limited to a brush body, and may be a rotating body in which a sponge member is formed in a columnar shape, for example.
The former-side transport body 37 is preferably provided on the front side (upstream side in the transport direction) with a wiping member 76a that contacts the root side of the crop and tilts the leaf stem side rearward. In this case, the transport path 40 Since the rod-shaped former payment member 76a facing the surface imparts conveyance resistance to the base and tilts in advance, the crop in the accommodation posture can be accumulated in the accommodation portion 36 by the original feeding member 76 in an orderly manner.

Next, the structure of the front part of the harvesting apparatus 3 will be described. The outer transport frame 41 located on the left and right of the harvesting device 3 and the inner transport frame 42 in the center of the device are each provided with a divider 78 for scraping crops (leafy vegetables) at the tip, and the cutter 11 is removed from the ground surface. It is provided so as to be buried in the ground by a predetermined depth (for example, about 10 to 20 mm).
As a result, each divider 78 can guide the crops to the respective transport paths 40 as the aircraft progresses, and when the crops guided by the weeds start nipping and transporting by the transport belts 10 on both sides rotating inward. The cutter 11 cuts the root portion and can be smoothly transported by the transport band 10.

  The cutter 11 according to the embodiment is L-shaped in a front view, and the vertical piece portion is attached to each conveyance frame so that the blade portion can swing back and forth with a mounting shaft 79 as a fulcrum. A drive shaft 81 is connected to a forward / backward swing drive mechanism (not shown) configured on the transport transmission mechanism 12 side. As a result, when the drive rod 81 is moved back and forth by the back and forth swing drive mechanism, the cutter 11 can swing the blade portion back and forth in the ground with the mounting shaft 79 as a fulcrum to reliably cut the root portion or the root of the crop. . The cutter 11 can also be adjusted to adjust the vertical height of the blade portion or to have a fixed operation.

  Next, a working example of harvesting small leek (hereinafter simply referred to as a leek) will be described with respect to the working mode, operation, and the like by the harvesting machine 1 configured as described above. First, the harvesting machine 1 adjusts the interval adjustment mechanism 57 to adjust the width of the leek row in the field to adjust the left conveyance unit 9c and the right conveyance unit 9d to the left and right, and to adjust the width of the leek row in the field to adjust the left and right The starting end portion of the conveyance path 40 is positioned and the work is started. Next, when the motor 8 is driven, the driving wheel 6 rotates in the direction of the arrow, and the vehicle can travel through the crawler 25 that supports the substantially central portion of the harvesting device 3. When the motor 8a is driven, the transport belts 10 installed on both sides of the transport path 40 can be rotated inward with respect to each other through the transport transmission mechanism 12 as described above.

As a result, the harvesting machine 1 travels through the onion cultivation field, cuts the root part of the leek scraped by the divider 78 with the cutter 11, and holds and conveys the cut green onion rearward and upward with the transport belt 10.
The leeks that have been nipped and transported from the end of the transport path 40 are received and transported downward by the auxiliary transport body 37 and sequentially accumulated and stored in the storage unit 36.
After that, the operator removes the receiving member 39 from the left and right receiving and supporting rods 38, puts the receiving member 39 on the ground with both sides piled up so as to wrap the accumulated leek, and receives and supports the new receiving member 39. The harvesting operation can be performed continuously and efficiently by setting it again on the basket 38 and restarting the operation.

The harvesting machine 1 that performs the harvesting operation as described above is in a state in which the traveling device 5 is stretched in a triangular shape with the crawler 25 having an acute angle front and the driven wheel 23 side is brought close to the lower portion of the transport unit 9. Since the transport unit 9 is mounted with a gentle slope along the upper slope of the crawler 25, the transport unit 9 can smoothly perform a small turn while stably supporting the airframe at the center in the width direction. .
Further, the rotation of the transport unit 5 and the travel frame 19 with the drive shaft 6a as a fulcrum is supported by connecting and supporting the travel device 5 and the transport unit 9 with the drive shaft 6a. The front side can be smoothly rotated up and down around the center, and the weight of the transport unit 9 can be hung on the traveling frame 19 via the rotation restricting mechanism 17, and the driving reaction generated when the crawler 25 is rotated in the forward direction. It is possible to effectively cancel the force. Accordingly, stable traveling is performed by the traveling device 5 that restricts the large separation between the transport unit 9 and the traveling device 5.

  That is, when the harvester 1 travels in the concave portion of the ground during the harvesting operation, the front portion of the traveling device 5 rotates downward with the drive shaft 6a as a fulcrum while the front portion of the harvesting device 3 is in contact with the ground. After passing along the concave portion, the rotating device returns to the original posture, and when traveling on the convex portion, the traveling device 5 is within the interchangeable operation range set by the rotational restriction support mechanism 17 with the drive shaft 6a as a fulcrum. Then, after turning upward, it passes through the convex portion and smoothly returns to the original posture. Similarly, when traveling on high ridges such as ridges and ridges, the harvesting device 3 and the traveling device 5 attempt to rotate in directions that are largely separated from each other, but when the rotation exceeds the interchangeable operation area. Since the rotation restriction support mechanism 17 restricts the separation, it is possible to prevent the airframe from becoming unstable and to make the running smooth.

Further, since the harvesting machine 1 is provided with the heavy battery 7 on the left and right sides of the traveling device 5 so as to be close to the ground, the harvesting machine 1 acts to lower the center of gravity of the machine body and improves the left-right balance. The harvesting device 3 can be supported stably by the traveling device 5 of the mold, and the traveling stability can be improved. Further, since the weight of the battery 7 is directly applied to the traveling device 5, it acts in the direction of canceling the driving reaction force generated when the crawler 25 is rotated in the forward direction.
As described above, the harvesting machine 1 including the single type traveling device 5 with improved body balance can simplify the operation and operation structure, and can easily travel even in narrow ridges and ridges while reducing the weight of the body. In addition, it is possible to easily make a small turn of the aircraft on the heel.
Therefore, it is possible to provide the harvesting machine 1 with the traveling device 5 close to the lower part of the transport unit 9 that is compact, well-packed, and easy to handle. This makes it possible to perform harvesting operations efficiently.

  Further, the harvesting machine 1 has a belt conveyance device provided in the conveyance unit 9, and the conveyance band 10 is configured by the flat belt part 51 having the shape described above, the elastic clamping protrusion 52 and the guide protrusion 31, thereby preventing the belt from coming off. However, since the clamping portion of the crop is elastically clamped between the opposing elastic clamping projections 52, the crop is securely held without being crushed or damaged, and the crop is non-clamped. Within the conveyance support interval of the conveyance path 40 formed by the flat belt portion 51 opposed to the sandwiching portion (leaf stem portion), the posture to the side is regulated to prevent falling, etc., and to carry out orderly and facilitate collection. Therefore, it can be stored in order in the storage portion 36 without causing damage to the leaf stem portion, and can be harvested with good quality. In addition, there is a feature that it is possible to perform harvesting work without damaging the quality even when the aircraft is turning small and speeding up the work.

  Further, since the harvesting machine 1 is provided with the auxiliary transport body 37 at the end of the transport path 40, the harvesting machine 1 smoothly carries out the transport of the crop root from the end of the transport belt 10 and supports the crop root so as to smoothly store the crop in the storage unit 36. Can be done. That is, the peripheral surface of the feed member 76 that rotates about the rotation shaft 74 is located at the end of the transport belt 10 for a crop that is released from the end of the transport path 40 and is about to fall naturally in a substantially upright posture. Since it makes rotational contact so as to push up the bottom end of the crop, it can be separated from the following crops, and then draw an arc trajectory with the rotation axis 74 as the center at the back toward the top of the crop while preventing natural fall. However, it is possible to guide the storage unit 36 and accumulate the crops in the storage unit 36 in an orderly manner. Therefore, it is possible to prevent clogging of crops at the end of the transport path 40 and entanglement of crops, and to prevent deterioration in quality at the time of crop collection. It is possible to facilitate the work.

In addition, the conveyance band 10 is not limited to the shape and use form of the illustrated example, and an elastic clamping protrusion 52 is provided so as to guide the leaf stem portion or the root side while holding a position adapted to the type and shape of the crop. You may make it project in the middle position of the flat belt part 51. FIG. Further, an elastic clamping protrusion 52 can be provided on the upper part of the flat belt portion 51. In this case, the upper part of the crop can be clamped. In such a state, it is possible to convey while restricting and supporting the shaking in the left-right direction on the lower side of the flat belt portion 51 of the conveying band 10 that makes a pair of thick root portions.
Further, by stretching the transport belt 10 so as to be able to rotate on the horizontal axis, it is possible to configure a transport path 40 that sandwiches and transports an arbitrary transported object in a lateral orientation, and the application of the belt transport device can be expanded.

It is a whole side view which shows the structure and working state of the soft vegetable harvester to which this invention is applied. It is a top view which fractures | ruptures and shows the structure of the traveling apparatus of FIG. It is the sectional view on the AA line of FIG. It is a top view of FIG. It is a top view which simplifies and shows the state which extended the right-and-left conveyance path of the soft vegetable harvesting machine of FIG. It is a top view which shows the structure of the conveyance transmission mechanism of FIG. It is a top view which shows the effect | action of the conveyance transmission mechanism of FIG. It is a side view which shows the structure of an outer side conveyance part. It is a side view which shows the structure of an inner side conveyance part and a conveyance transmission mechanism. It is the BB sectional view taken on the line of FIG. It is sectional drawing which shows the shape and effect | action of a conveyance belt.

Explanation of symbols

1 Harvester (soft vegetable harvester)
2 traveling machine body 3 harvesting device 5 traveling device 9 transport unit 10 transport band 31 guide projection 37 auxiliary transport body 40 transport path 43 driven pulley 45 drive pulley 48 pulley groove 51 flat belt portion 52 projection for elastic clamping

Claims (4)

  In a belt conveyance device that forms a conveyance path (40) for nipping and conveying a crop by arranging a belt-like conveyance band (10) wound around a drive pulley (45) and a driven pulley (43) on the left and right A flat belt portion (51) having a length and a width for forming a conveyance path (40) in the conveyance belt (10), and a clamping portion for a crop along the belt direction on the conveyance surface side of the flat belt portion (51) Are provided with elastic pinching protrusions (52) that elastically hold the belt, and the driving pulley (45) of the driving belt (45) is provided along the portion where the elastic pinching protrusions (52) are installed on the back side of the flat belt portion (51). A belt conveyance device characterized in that a guide projection (31) is provided to be fitted into a groove-like pulley groove (48) formed on the outer periphery.   With respect to the transport device unit in which the transport belt (10) is wound around the drive pulley (45) and the driven pulley (43), the transport terminal side of the other transport device unit provided is shifted downstream in the transport direction. The belt conveyance device according to claim 1 installed.   The belt conveyance device according to claim 1 or 2, wherein an auxiliary conveyance body (37) is provided at a terminal portion of the conveyance path (40) for receiving an end portion of the crop from which nipping conveyance is released and conveying the crop rearward.   The conveyance path (40) of the conveyance section (9) for nipping and conveying the crop is arranged on the left and right, and the start end side is expanded to the left and right with the end side of the left and right conveyance paths (40) supported at a fixed position. The belt conveyance device according to claim 1, 2 or 3, which is supported in a possible manner.

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