JP2016096749A - Cutting-down machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting-down machine capable of cutting down herbs in a substantially fixed direction.SOLUTION: A cutting-down machine 1 for cutting down herbs G by using a vehicle body 2 capable of traveling in forward and backward directions comprises the vehicle body 2, a cutter 10 overhanging on the side of the vehicle 2, and a push guide 13 that is fixed to the vehicle body 2 and arranged toward a predetermined direction above the cutter 10. The push guide 13 includes a lower guide 11 provided at the same height as the cutter 10 or above the cutter 10 in order to push a lower part of the herbs G, and an upper guide 12 provided above the lower guide 11 in order to push a higher part of the herbs G above the lower part. The lower guide 11 and the upper guide 12 are independent from each other with their angles being adjustable in a horizontal direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a trimming machine that trims herbs using a vehicle body that can travel in the front-rear direction.

  As described in Patent Document 1 below, there is a known mowing machine that harvests long crops using a tractor body (vehicle body) that can move forward and backward. In this mower, a frame is connected to the rear part of the tractor body, and a rotary cutter is provided on the frame. A guide plate that is supported obliquely with respect to the traveling direction of the tractor is provided in the vicinity of the upper surface of the rotary cutter, and a guide rod that biases the crop in the traveling direction is provided above the guide plate.

Japanese Utility Model Publication No. 1-109927

  In the above-described mower, when the rotary cutter advances following the tractor while rotating, the long crop is first biased by the guide rod in a substantially traveling direction and tilted. The crop base is then cut with a cutter. The base of the cut crop is transferred along the guide plate to the side opposite to the traveling direction, and the guide plate prevents the crop from being caught in the center of rotation of the cutter. As a result, the long bamboo crops are accumulated in the state of shogi with the tip portion facing in the traveling direction.

  In recent years, for example, tall herbs (hereinafter referred to as large herbs) have been studied as bioethanol raw materials. When the grown large herbs are cut, the roots are cut with a cutter. If the large herbs fall down in various directions after cutting, for example, there is a possibility that their recovery operation becomes difficult. In the above-described conventional mower, even if the crop can be tilted in the traveling direction, it cannot be adjusted so as to trim the herbaceous plant in any fixed direction. Accordingly, there is a need for a mower that can mow herbs in a desired direction when mowing herbs.

  An object of the present invention is to provide a cutting machine that can cut down herbs in a substantially constant direction and that can improve the alignment accuracy of the cut down herbs.

  The present invention relates to a trimming machine that trims herbaceous plants using a vehicle body that can travel in the front-rear direction, and is fixed to the vehicle body, a cutter projecting to the side of the vehicle body, An extrusion guide installed in a predetermined direction on the upper side, and the extrusion guide is arranged at the same height as the cutter or above the cutter, and a lower guide that pushes out the lower part of the herbaceous plant, and above the lower guide And an upper guide that pushes out a portion higher than the lower part of the herbaceous plant, and the lower guide and the upper guide are each independently adjustable in angle in the horizontal direction.

  According to this mowing machine, the herbs are mowed by the cutter projecting to the side of the vehicle body. At this time, the herbs contact a push guide fixed to the vehicle body and installed above the cutter. Since the extrusion guide moves in the traveling direction as the vehicle body proceeds, the herbs are pushed out by the extrusion guide and then fall down. Since the extrusion guide is installed in a predetermined direction, the direction in which the herbs are pushed out, that is, the direction in which the herb is collapsed, is substantially constant. When herbs fall down in a substantially constant direction, adjacent herbs are prevented from overlapping. Therefore, the drying efficiency in the case of drying herbs in the field is increased. In addition, the harvested herbs can be easily collected. Furthermore, since the angle of the extrusion guide can be adjusted in the horizontal direction, the direction in which the herb falls can be arbitrarily adjusted according to the height of the herb or the planting interval. These effects are particularly prominent when the herb to be cut down is a large herb. The extrusion guide has a lower guide and an upper guide. The lower guide pushes out the lower part of the herb and the upper guide pushes out the part higher than the lower part of the herb. In this way, by extruding herbs at two points having different heights, the direction in which the herbs fall can be controlled more reliably. Further, the angle of the lower guide and the upper guide can be adjusted independently in the horizontal direction, so that the angle at which the lower part of the herb is pushed out and the angle at which the part higher than the lower part is pushed out can be adjusted independently. Can do. Thereby, the alignment accuracy of the cut herbs can be improved. In addition, the alignment precision here means that the fell direction of the cut herbaceous plants is aligned.

  The position of the upper guide may be adjustable in the vertical direction. According to this configuration, even if the nature of the herbs, the type of herbs, or the harvest time of the herbs change, the herb that has been cut down by adjusting the position (height) of the upper guide The alignment accuracy of the sort is improved.

  The upper guide is disposed in front of the lower guide with respect to the traveling direction of the vehicle body. According to this configuration, the upper guide comes into contact with the herbs at an earlier timing than the lower guide. The upper guide that is pushed out more easily affects the direction in which the herbs fall. Therefore, the herb can be oriented in a certain direction in advance by the upper guide.

  The upper guide is disposed in front of the cutter with respect to the traveling direction of the vehicle body. According to this configuration, the upper guide comes into contact with the herb at an earlier timing than the cutter cuts the herb. Therefore, the herb can be oriented in a certain direction by the upper guide before the herb is cut.

  According to the present invention, herbs can be cut down with high accuracy in a substantially constant direction.

1 is a perspective view of a mowing machine according to a first embodiment of the present invention. It is a top view of the mowing machine of FIG. It is a rear view of the mowing machine of FIG. It is a disassembled perspective view which shows a cutter, a lower guide, and an upper guide. It is a top view which expands and shows a cutter, a lower guide, and an upper guide. It is a top view which shows the state in which grasses are cut down by the mowing machine of FIG. It is a rear view of the mowing machine which concerns on the modification of 1st Embodiment. It is a top view which shows the rear part structure of the mowing machine of FIG. It is a perspective view which shows an upper guide. It is a perspective view which shows a lower guide. It is a perspective view of the mowing machine which concerns on 2nd Embodiment of this invention. It is a top view of the mowing machine of FIG. It is a right view of the mowing machine of FIG. It is a top view which expands and shows a cutter, a lower guide, and an upper guide.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted. In the following description, unless otherwise specified, the forward direction of the tractor 2 is assumed to be forward, and front / rear / left / right are determined based on the forward direction.

  As shown in FIGS. 1 to 3, the mowing machine 1 is a vehicle for cutting down grasses G (see FIG. 6), which are large grasses, for example. The mowing machine 1 includes a tractor (vehicle body) 2 that can travel in the front-rear direction, and a mowing unit 20 that protrudes to the rear right side of the tractor 2. The mowing machine 1 cuts and cuts the root of the herb G by rotating the rotary cutter 10 of the mowing unit 20 while traveling.

  Herbaceous G is a plant that contains sugar crops such as sugar cane and oil crops such as rapeseed, and serves as a raw material for biomass energy in land where food production is inappropriate. The herbaceous species G is not particularly limited in type, and examples thereof include plants of a type such as Elianthus or Napiergrass. Such a cellulosic raw material is advantageous in that it does not compete with food compared to corn, rape, and the like. The herbaceous G has a height (height) of, for example, 1 m or more, and may have a height of 3 m or more.

  The mowing machine 1 includes the mowing unit 20 so that the herb G can be trimmed in a substantially constant direction. The trimming unit 20 includes a rotary cutter (cutter) 10 protruding to the side of the tractor 2 and an extrusion guide 13 that is fixed to the tractor 2 and faces diagonally forward to the right.

  An L-shaped support arm 16 is horizontally attached to the rear portion of the tractor 2 using a three-point link. A rotation center shaft 16a having an axis line La (see FIGS. 4 and 5) extending in the vertical direction is provided in the middle portion of the support arm 16 protruding to the rear right side of the tractor 2. The trimming unit 20 having the rotary cutter 10 and the push-out guide 13 is rotatable about the axis La of the rotation center shaft 16a. The trimming unit 20 can be fixed to the support arm 16 by inserting the fixing pin 16 b through the hole of the unit fixing plate 16 c provided integrally with the rotary cutter 10 and the extrusion guide 13. A cylindrical cutter support portion 17 is fixed to the tip of the support arm 16. The cutter support part 17 is installed vertically downward. A rotary cutter 10 having a rotary blade is supported on a rotary plate 17a that is rotatably arranged at the lower end of the cutter support portion 17. The rotary plate 17 a and the rotary cutter 10 are driven to rotate about the axis L <b> 1 of the cutter support portion 17 by a drive source mounted on the tractor 2.

  The rotation center of the rotary cutter 10 is located outward from the right end portion (outer end surface of the rear wheel 2a) of the trimming machine 1 (see FIG. 2). The position of the rotary cutter 10 can be adjusted in the vertical direction using a three-point link. For example, the position of the rotary cutter 10 is adjusted in the vicinity of the lower portion of the rear wheel 2a of the tractor 2 so as to have a height corresponding to the root of the herb G (see FIG. 3).

  The extrusion guide 13 includes a plate-like lower guide 11 disposed in the vicinity of the upper side of the rotary cutter 10 and a bar-shaped upper guide 12 disposed above the rotary cutter 10 and the lower guide 11. The lower guide 11 and the upper guide 12 are respectively installed in a predetermined direction above the rotary cutter 10. The lower guide 11 and the upper guide 12 incline (that is, direct) the herb G to be cut by the rotary cutter 10 as the mowing machine 1 advances.

  As shown in FIG. 4, a rod-shaped guide support portion 18 is fixed to the cutter support portion 17. The guide support portion 18 is provided in parallel with the axis L1 of the cutter support portion 17 along the cutter support portion 17. The lower end of the guide support portion 18 terminates in the vicinity of the rotary cutter 10. The lower guide 11 is fixed to the lower end portion of the guide support portion 18. Further, an upper guide 12 is fixed to an upper end portion of the guide support portion 18 by extending an arm from the guide support portion 18 in the horizontal direction.

  The lower guide 11 has a function of pushing out the lower part (near the stockholder) of the herb G, and can be adjusted in the vertical direction according to the cutting height. The upper guide 12 has a function of pushing out a portion higher than the lower part of the herb G. More specifically, the lower guide 11 pushes the lower part of the herbaceous G (immediately above the stock company) diagonally forward. The upper guide 12 pushes a portion or upper portion between the stock base and the upper portion in the height direction of the herb G to the front side.

  The upper guide 12 has an attachment bar 12a attached to the guide support 18 and a guide bar 12b attached to the front side of the attachment bar 12a. The upper guide 12 has a function of extruding the upper part of the herb G (near the upper part between the plant head and the tip), and can be adjusted in the vertical direction according to the height, that is, the plant height. A cylindrical portion into which the guide support portion 18 is inserted is provided on the proximal end side of the upper guide 12. The cylindrical portion can be slid in the vertical direction along the guide support portion 18 and can be fixed to the guide support portion 18 at an arbitrary height. For example, the position of the upper guide 12 is adjusted to a position corresponding to a portion between the stock base and the upper portion or the upper portion in the height direction of the herb G to be cut down (see FIG. 3). The upper guide 12 is provided within the range of the height of the tractor 2. The upper guide 12 and the lower guide 11 are spaced apart in the vertical direction. In this way, the upper guide 12 and the lower guide 11 are separated from each other, and the herb G can be brought down in a desired direction by pressing the herb G at two points having different height directions.

  The lower guide 11 is rotatable about the axis L1 of the guide support 18. That is, the angle of the lower guide 11 can be adjusted in the horizontal direction. The upper guide 12 is rotatable about an axis L1 and an axis L2 extending in parallel with the guide support 18 and the respective axes, and the angle can be adjusted in the horizontal direction.

  The rotation mechanism of each of the lower guide 11 and the upper guide 12 is not particularly limited. For example, the lower guide 11 and the upper guide 12 have a double cylindrical tube structure extending along the axis L1 or L2, and the other cylinder with respect to one cylindrical tube. A structure in which the tube is rotated and fixed can be adopted. As a fixing method, it may be fixed with screws, bolts, or the like, or may be fixed with a clamp structure.

  The configuration of the lower guide 11 and the upper guide 12 will be described in more detail. As shown in FIG. 5, the upper guide 12 is disposed in front of the lower guide 11 with respect to the traveling direction D of the tractor 2. Yes. Further, the upper guide 12 is disposed on the front side of the rotary cutter 10 with respect to the traveling direction D of the tractor 2.

  A guide surface 11a, which is the front surface of the lower guide 11, is installed obliquely to the right and at an angle α with respect to the traveling direction D. The guide bar 12b of the upper guide 12 is installed obliquely forward to the right at an angle β with respect to the traveling direction D. In plan view, the inclination angle β with respect to the traveling direction D of the upper guide 12 is larger than the inclination angle α with respect to the traveling direction D of the lower guide 11.

  In the trimming machine 1 including the trimming unit 20 described above, the rotary cutter 10 is driven to rotate at the same time as the trimming machine 1 travels in the traveling direction D. As shown in FIG. 6, herbs G are arranged in the X and Y directions in the field. In the X direction, the herbs are planted with a constant interval d (so-called streak). The trimming machine 1 trims the herb G while traveling in the Y direction within the interval d.

  At this time, the upper guide 12 aligns the portion or upper portion between the stock source and the upper portion in a predetermined direction at the same time as pushing down the portion or upper portion between the stock source and the upper portion in the height direction of the herb G. The lower guide 11 pushes the base of the herb G and simultaneously aligns the base in a predetermined direction. Further, the lower guide 11 prevents the herb G from being caught in the drive shaft of the rotary cutter 10. Furthermore, the lower guide 11 also has an effect of preventing the cut material from scattering to the rear of the tractor 2 (the peripheral speed of the rotary cutter 10 is about 15 to 20 m / s) simultaneously with the entrainment of the long crop.

  According to the mowing machine 1, the herb G is cut by the rotary cutter 10 projecting to the side of the tractor 2. At this time, the herb G is in contact with an extrusion guide 13 that is fixed to the tractor 2 and installed above the rotary cutter 10. Since the extrusion guide 13 moves in the traveling direction D as the tractor 2 moves, the herbaceous species G is pushed out by the extrusion guide 13 and falls down. Since the extrusion guide 13 is installed in a predetermined direction, the direction in which the herb G is pushed out, that is, the direction in which the herb G falls down is substantially constant (see FIG. 6). Since the direction in which the herb G falls is substantially constant, the alignment accuracy of the herb G at the time of cutting down is high. By causing the herbaceous species G to fall in a substantially constant direction, the adjacent herbaceous species G are prevented from overlapping each other. Therefore, the drying efficiency at the time of drying the herb G in a field is improved. In addition, the harvested herb G can be easily collected. Furthermore, since the angle of the extrusion guide 13 can be adjusted in the horizontal direction, the direction in which the herb G falls down is arbitrarily adjusted according to the height of the herb G, the planting interval (interval in the X direction or Y direction), and the like. it can. These effects are particularly prominent when the herb G to be cut down is a large herb.

  In addition, as shown in FIG. 6, by appropriately adjusting the angle of the extrusion guide 13, the tip Ga of the fallen herb G does not cover the strain Gb remaining in the adjacent row. Therefore, it is prevented that the germination and growth of the following herb G are prevented. Moreover, since the herbaceous G can be accurately tilted in the desired direction (based on the traveling direction D) by the extrusion guide 13, while planting while maintaining the condition of preventing the herb G from being covered with each other, Herbaceous G can be densely arranged. In other words, the interval d can be reduced. This is advantageous in terms of herbaceous production efficiency.

  The extrusion guide 13 includes a lower guide 11 and an upper guide 12, and the lower end of the herb G is pushed out by the lower guide 11. The part between the stock and the upper part) is pushed out. Thus, by extruding the herb G at two points having different heights, the direction in which the herb G falls can be controlled more reliably.

  Further, since the lower guide 11 and the upper guide 12 can be independently adjusted in the horizontal direction, the angle at which the lower part of the herb G is pushed out and the angle at which the part higher than the lower part is pushed out are adjusted independently. be able to. Thereby, it is possible to freely set the direction in which the herb G that has been cut down is to be aligned.

  The effect of improving the alignment accuracy will be described in more detail. Since each of the lower guide 11 and the upper guide 12 can be rotated independently of the rotary cutter 10, the horizontal angle (push down) of the lower guide 11 and / or the upper guide 12 is maintained while the position of the rotary cutter 10 is fixed. (Direction of action) can be adjusted respectively. The position of the rotary cutter 10 with respect to the herb G is adjusted and fixed, for example, at the first stage of the mowing season (so-called alignment). On the other hand, with the position of the rotary cutter 10 fixed, the properties of the herb G (hardness, density, moisture, etc.), or the height of the extruded part (lower part, part between the stock and upper part, or upper part) ), The angle or orientation of the lower guide 11 and / or the upper guide 12 can be adjusted. In other words, the angle of the lower guide 11 and / or the upper guide 12 can be adjusted without changing the distance between the tractor 2 and the center of the rotary cutter 10. Therefore, it is possible to align the herbaceous species G having various properties substantially in parallel with the direction in which they are desired to be tilted without changing the travel position of the tractor 2 or the cut eye viewpoint (see FIG. 6).

Alignment of herb G with high accuracy according to the type of herb G (height, ie, height, diameter, hardness, density, moisture, etc.) Can be made. For example, as shown in the measured data in Table 1 below, when the cutting angle θ (see FIG. 6) is reduced in the high moisture season (aligned along the streak), the angle of the lower guide 11 Adjust α to be small. In addition, when it is desired to increase the cutting angle θ under the condition that the plant height is relatively low and the moisture content of the crop is high, the angle α of the lower guide 11 may be adjusted to be small. However, these values are only examples and are based on actual measurements in specific fields in Japan, including overseas (year-round cultivation in the tropical region), fields, soil, and crops (variety of resource crop G, etc.) Depending on the conditions, the optimum α and β corresponding to the desired cutting angle θ are different, so it is necessary to perform the adjustment operation in the first work process and find the optimum value.

  The position of the upper guide 12 can be adjusted in the vertical direction, and even when the nature or type of the herb G described above changes, the upper guide 12 is trimmed by adjusting the position (height) of the upper guide 12. The alignment accuracy of herbs is improved. Furthermore, the trimming angle θ can be adjusted by adjusting the angle α of the lower guide 11. Even when the harvesting time of the herb G (so-called green cutting period, withering period, or an intermediate period thereof) changes, the action point of the upper guide 12 on the herb G (the ground) Height) can be adjusted. The height (height) of the herb G that is a resource crop varies greatly depending on the harvesting time, but the upper guide 12 whose position can be adjusted in the vertical direction can cope with any harvesting time. Since the height of the upper guide 12 can be adjusted while the height of the rotary cutter 10 is fixed, it is possible to make an adjustment focusing on the push-down function independently of the cutting function.

  Further, since the upper guide 12 is disposed in front of the lower guide 11 with respect to the traveling direction D of the tractor 2, the upper guide 12 contacts the herb G at an earlier timing than the lower guide 11. The upper guide 12 that is pushed out more easily affects the direction in which the herb G falls. Therefore, the herb G is directed in a certain direction (specifically, diagonally forward right) by the upper guide 12.

  Further, since the upper guide 12 is disposed in front of the rotary cutter 10 with respect to the traveling direction D of the tractor 2, the upper guide 12 is herbaceous at an earlier timing than the rotary cutter 10 cuts the herb G. Abuts on G. Therefore, before the herb G is cut, the upper guide 12 directs the herb G in a certain direction (specifically, diagonally forward right).

  Next, with reference to FIGS. 7 to 10, a trimming unit 20 </ b> B that is a modification of the first embodiment will be described. As shown in FIGS. 7 and 8, an expansion / contraction mechanism 40 that can expand and contract in the left-right direction (X direction in FIG. 6) is provided at the center of the support arm 16 </ b> B that protrudes to the side of the tractor 2. The telescopic mechanism 40 has, for example, a double square steel pipe extending in the horizontal direction. The position of the cutting unit 20B with respect to the tractor 2 can be adjusted by moving and fixing the steel pipe on the distal end side in the left-right direction (X direction in FIG. 6) with respect to the steel pipe on the base side. That is, the position of the rotary cutter 10 relative to the tractor 2 can be adjusted.

  If the extension mechanism 40 is provided, the position of the rotary cutter 10 relative to the traveling position of the tractor 2 can be adjusted. Therefore, even if the distance d (see FIG. 6) changes due to the type of the herb G being different. The rotary cutter 10 can be adjusted to a suitable position in the X direction. The expansion / contraction function by the expansion / contraction mechanism 40 is also effective during so-called alignment. Note that, like the cutting unit 20 of the first embodiment, the cutting unit 20B is rotatable about the axis La. When the fixing pin 16b is inserted into the hole of the unit fixing plate 16c provided integrally with the rotary cutter 10 and the cutter support portion 17 and the like, the trimming unit 20B can be fixed to the support arm 16B. is there. During the work, the trimming unit 20B is fixed at the position shown in FIGS. 7 and 8, and the overhanging state of the trimming unit 20B is maintained. On the other hand, the fixing pin 16b is pulled out, the trimming unit 20B is rotated in the direction opposite to the vehicle body traveling direction, and the hole through which the fixing pin 16b is inserted and the hole 16d of the unit fixing plate 16c are aligned to overlap each other. By inserting the fixing pin 16b into the cutting unit, the trimming unit 20B is fixed in the stored state. This storage mechanism may be applied to the trimming unit 20 of the first embodiment.

  As shown in FIG. 9, the upper guide 12B of the trimming unit 20B has an angle adjusting unit 42 provided around the axis L1. The angle adjustment unit 42 includes a fan-shaped angle adjustment plate 42a fixed to the upper end of the guide support 18 and a locking portion 42b provided integrally with the base of the upper guide 12B. A plurality of positioning holes arranged in an arc shape are formed in the angle adjusting plate 42a. The locking part 42b has a pin protruding downward. The angle of the upper guide 12B can be adjusted by inserting the pin of the locking portion 42b into the positioning hole of the angle adjusting plate 42a.

  Further, the upper guide 12B includes a plurality of coil springs 12c that urge the guide bar 12b in a direction separating the mounting bar 12a. Each coil spring 12c has a predetermined initial set length and is provided between the mounting bar 12a and the guide bar 12b. The coil spring 12c is disposed in a direction perpendicular to the installation direction of the mounting bar 12a and the guide bar 12b, and exerts an urging force on the guide bar 12b in this direction. Each coil spring 12c has an urging force adjusting function for changing the urging force of the guide bar 12b. With this configuration, the urging force can be adjusted according to the reaction force from the herb G. Each coil spring 12c of the embodiment can be set to a free length of 100 mm and a spring constant of 0.45 kg / mm, for example, when napier grass is used as the herb G. In this case, when the initial set length is 95 mm, a good urging force can be obtained. When the herb G is an Elinthus with enlarged growth, it is replaced with a coil spring having a slightly larger spring constant. With the configuration described above, when the guide bar 12b receives a reaction force from the herb G when it abuts on the herb G, the guide bar 12b moves in a direction approaching the mounting bar 12a. At this time, the coil spring 12c is compressed while exerting an urging force in the opposite direction on the guide bar 12b.

  Thus, according to the upper guide 12B having cushioning properties, versatility for different kinds of herbs G is enhanced. That is, in the case of resource crops, the number of stems per strain is extremely large, for example, usually 100 to 200 stems, and about 300 stems at the maximum. Moreover, the diameter of one strain is large, usually 10 to 40 cm, and about 60 cm at the maximum. Further, there may be variations and fluctuations within the crop rows (Y direction in FIG. 6) and between crop rows (X direction in FIG. 6). In such a case, the position of the upper guide 12B (the distance between the rotary cutter 10 and the upper guide 12B) to be set when the rotary cutter 10 starts to cut the stock stock with respect to the traveling direction of the tractor 2 is variable ( It is desirable that it is not constant. According to the above configuration, a constant pushing force can be exerted on the resistance of different crops and different stock diameters by the biasing force and initial set length of the coil spring 12c. When the rotary cutter 10 cuts the herb G while applying a constant pushing force to the herb G, the alignment accuracy of the harvested resource crops is improved. In addition, the above problems are unlikely to occur in plants with a small number of stems or diameter per strain such as corn, sorghum, sugar cane, etc., but when a resource crop that is a large herbaceous G is considered, cushion operation The possible upper guide 12B is particularly effective.

  As shown in FIG. 10, the lower guide 11B of the trimming unit 20B has an angle adjustment unit 41 provided around the axis L1. The angle adjustment unit 41 includes a fan-shaped angle adjustment plate 41a fixed to the lower end of the guide support 18 and a locking part 41b provided integrally with the base of the lower guide 11B. The angle adjusting plate 41a is formed with a plurality of positioning holes arranged in an arc shape. The locking portion 41b has a pin protruding downward. The angle of the lower guide 11B can be adjusted by inserting the pin of the locking portion 41b into the positioning hole of the angle adjusting plate 41a.

  Next, a mowing machine 1A according to the second embodiment will be described with reference to FIGS. The mowing machine 1A has a handle 30 attached to the vehicle body 2A. The mowing machine 1A is a so-called self-propelled walking type mowing machine in which the vehicle body 2A is self-propelled in a state where a walking operator holds the handle 30. The mowing machine 1A is applied to a relatively small herb G.

  The trimming machine 1A includes a vehicle body 2A that can travel in the front-rear direction, and a trimming unit 20A that projects in front of the vehicle body 2A. The trimming unit 20A includes a reciprocating cutter 10A that projects to the side of the vehicle body 2A, and an extrusion guide 13 that is fixed to the vehicle body 2A and faces diagonally right forward. The reciprocating cutter 10A is fixed to the lower end portion of the guide support portion 18A and is installed substantially horizontally. The reciprocating cutter 10A is located outward from the right end of the cutting machine 1A (see FIG. 12). The position of the reciprocating cutter 10A can be adjusted in the vertical direction, and is adjusted in the vicinity of the lower portion of the vehicle body 2A so as to have a height corresponding to the root of the herb G (see FIG. 13).

  The extrusion guide 13 has a plate-like lower guide 11A disposed near the upper part of the reciprocating cutter 10A, and a bar-shaped upper guide 12A disposed above the reciprocating cutter 10A and the lower guide 11A. The lower guide 11A and the upper guide 12A are installed in a predetermined direction above the reciprocating cutter 10A. The lower guide 11A and the upper guide 12A incline (ie, direct) the herb G to be cut by the reciprocating cutter 10A as the mowing machine 1A advances. The main guide bar 31 that is a part of the upper guide 12A that comes into contact with the herb G acts on the main guide bar 31 to push down the herb G in the direction corresponding to the angle β1 as the vehicle body 2A advances. In this state, the reciprocating cutter 10A is in contact with the stems on the outer periphery of the stock in order, so that the herb G is cut relatively easily and the lower part of each stem is cut down according to the adjustment direction of the lower guide 11A whose angle is adjusted. Align almost constant.

  The lower guide 11A and the upper guide 12A have the same functions as the lower guide 11 and the upper guide 12 in the trimming unit 20 of the first embodiment. The lower guide 11A is rotatable about an axis L3 (see FIG. 13) of a guide support portion 18A extending in the vertical direction, and the angle can be adjusted in the horizontal direction.

  The upper guide 12A is rotatably supported by the upper end portion of the guide support portion 18A and is installed substantially horizontally. The upper guide 12 </ b> A includes a main guide bar 31 fixed to the upper end portion of the guide support portion 18 </ b> A via a stay 33, and a sub guide bar 32 connected to the tip of the main guide bar 31. The upper guide 12A can be rotated around an axis L3 and an axis L4 (see FIG. 13) extending in parallel with the guide support 18A, and the angle can be adjusted in the horizontal direction independently of the lower guide 11A. It has become.

  The configuration of the lower guide 11A and the upper guide 12A will be described in more detail. As shown in FIG. 14, the upper guide 12A is disposed forward of the lower guide 11A with respect to the traveling direction D of the vehicle body 2A. . Further, the upper guide 12A is disposed in front of the reciprocating cutter 10A with reference to the traveling direction D of the vehicle body 2A.

  The guide surface 11a, which is the front surface of the lower guide 11A, makes an angle α1 with respect to the traveling direction D, and faces diagonally right forward. The main guide bar 31 of the upper guide 12A forms an angle β1 with respect to the traveling direction D. The sub guide bar 32 of the upper guide 12A forms an angle β2 with respect to the traveling direction D. The angle β2 is larger than the angle β1.

  In the above-described mower 1 </ b> A, the mower 1 </ b> A advances in the traveling direction D, and the reciprocating cutter 10 </ b> A is driven to reciprocate. The herb G cut by the reciprocating cutter 10A is directed by the lower guide 11A and the upper guide 12A and falls down in a substantially constant direction. In the trimming machine 1A, the herb G is pushed forward diagonally to the right by the advance of the vehicle body 2A and the cooperation of the upper guide 12A while being sandwiched between the reciprocating cutter 10A and the upper guide 12A. The sub guide bar 32 of the upper guide 12A is effective for guiding the herb G having a shape spreading toward the upper part to the reciprocating cutter 10A without missing. Even with such a mower 1A, the same operations and effects as the mower 1 of the first embodiment are exhibited.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, the arrangement relationship between the lower guide and the upper guide may be changed as appropriate. The horizontal angle and the vertical position of the lower guide and the upper guide can be adjusted according to the height of the herb G or the cutting direction. The lower guide is not limited to being disposed above the cutter, and may be disposed at the same height as the cutter. Although the case where the rotary cutter 10 or the reciprocating cutter 10A is used as the cutter has been described in the above embodiment, the present invention is not limited to this. For example, a saw chain (chain saw) may be used as the cutter. The magnitude relationship between the angle of the lower guides 11 and 11A with respect to the traveling direction D and the angle of the upper guides 12 and 12A with respect to the traveling direction D is not limited to the above-described mode. Each of these angles can be set as appropriate.

  DESCRIPTION OF SYMBOLS 1,1A ... Mowing machine, 2 ... Tractor (vehicle body), 2A ... Vehicle body, 10 ... Rotating cutter (cutter), 10A ... Reciprocating cutter (cutter), 11, 11A ... Lower guide, 12, 12A ... Upper guide, 13 ... extruding guide, 20, 20A, 20B ... cutting unit, D ... traveling direction, G ... herbaceous.

Claims (3)

A trimming machine that trims herbs using a vehicle body that can travel in the front-rear direction,
The vehicle body;
A cutter protruding to the side of the vehicle body;
An extrusion guide fixed to the vehicle body and installed in a predetermined direction above the cutter; and
The extrusion guide is
A lower guide which is arranged at the same height as the cutter or above the cutter and pushes out the lower part of the herbaceous species;
An upper guide that is arranged above the lower guide and pushes out a portion higher than the lower part of the herbs,
The lower guide and the upper guide are each independently adjustable in angle in the horizontal direction.   The mowing machine according to claim 1, wherein the position of the upper guide is adjustable in the vertical direction.   The mowing machine according to claim 1 or 2, wherein the upper guide is disposed in front of the cutter with respect to a traveling direction of the vehicle body.

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