JP2019030254A - Weed receiving plate and weed cutter - Google Patents

Abstract

To provide a weed receiving plate that prevents stones from scattering and weeds from being entangled to cut weeds around a fence and in a lower gap, and to provide a weed cutter.SOLUTION: A weed receiving plate includes: a first partition part capable of being erected at a cover for covering at least part of one surface of a rotary cutter provided to a weed cutter; and a second partition part movably attached to the first partition part. A height in a prescribed range varies as the second partition part moves.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a grass receiving plate and a mower.

  Conventionally, a mowing machine is known that cuts grass by swinging a rotary blade attached to the tip of a shaft to the left and right. In such a mower, half of the blades in the front in the direction of shaking mows the grass, but the half of the blades on the rear side in the direction of shaking does not contribute to mowing, and the mown grass may get tangled. The rotating blade may stop when the grass gets tangled.

  Further, even if the conventional two-blade mower can cut the root of the grass with a half blade on the front surface in the direction of swinging the rotary blade, the cut grass falls on the rotary blade cover. In many cases, the fallen grass is entangled behind the rotary blade and stops the rotary blade. When grass entangled with the rotary blade, it was necessary to disassemble the mounting portion of the rotary blade, remove the grass, reassemble the mowing after cleaning, and wasteful work occurred.

  Therefore, it is important for the mower to prevent the grass that has been cut when the rotary blade is swung in the mowing direction from going around the rotary blade. In addition, let the direction which shakes the rotary blade attached to the front-end | tip of a shaft toward grass (grass which has not been cut yet) be the mowing direction.

  As a conventional technique, for example, a rotating grass cutting blade is provided at the tip, and a grass cutter that receives the cut grass cut by the grass cutting blade and moves the grass with a swinging mowing operation of the grass cutter is provided above the grass cutting blade. A mowing machine has been proposed in which the main body of the grass cutter is formed of a rod-like body that lies above the mowing blade, and a convex or concave grass hanging portion is formed on the main body of the cutter. (For example, refer to Patent Document 1).

Japanese Patent Application No. 2003-143919

  However, the conventional mower has frequently caused accidents in which stones are scattered when mowing. Even with a two-blade mower that has a certain effect on preventing stones from being scattered, an accident in which the stones are thrown up in the swing direction of the rotary blades and the surrounding glass of the car is broken, or stones hit the workers around Occurred frequently. For this reason, as a preparation for the mowing work, a curing sheet was stretched, or two persons held the curing sheet and mowed while moving to ensure safety. In parks and the like, the use of only a two-blade mower that has a certain effect on prevention of stone scattering is permitted, and the use of other tip saws, nylon, cutters, etc. may be prohibited.

  In addition, when a conventional grass collecting member is provided on the cover of the rotary blade, there is a problem that mowing around a fence surrounding a park or the like cannot be performed. For example, the grass collecting member hits the fence, and the grass around the fence and under the gap could not be cut.

  It is an object of the present invention to provide a grass receiving plate and a mowing machine that prevent stones from being scattered and the grass is caught, and that can also mow the grass around the fence and in the gap below.

  A grass receiving plate according to one aspect of the present invention is movable with respect to a first partition that can be erected on a cover that covers at least a part of one surface of a rotary blade provided in a mower, and the first partition. And a second partition portion attached to the first partition portion, wherein the height of the predetermined range changes when the second partition portion moves.

  In the grass receiving plate according to one aspect of the present invention, the height of the other end side may be lower than a predetermined height when the second partition portion moves to the one end side.

  Further, in the grass receiving plate according to one aspect of the present invention, the second partition portion may rotate at an angle within a predetermined range with respect to the first partition portion.

  In the grass receiving plate according to one embodiment of the present invention, the two end portions may be curved in the same direction.

  In the grass receiving plate according to one aspect of the present invention, the first partition portion may include a guide portion that guides the grass in a direction in which the two end portions are curved.

  Moreover, the mower concerning 1 aspect of this invention may have either the grass receiving plate mentioned above, the said rotary blade, and the said cover.

  In the mower according to one aspect of the present invention, the rotary blade may be a two-blade that is coaxial and rotates in opposite directions.

  Further, the mower according to one aspect of the present invention covers the upper portion of the rotary blade together with the cover while exposing the blade portion of the rotary blade when the rotary blade is rotated in parallel with the ground. Even if it has an upper covering member and a lower covering member that covers the lower portion of the rotary blade while exposing the blade portion of the rotary blade when the rotary blade is rotated in parallel with the ground. Good.

  Further, a mower according to an aspect of the present invention includes a shaft in which a blade main body provided with the rotary blade is fixed to an end, and an operation handle that is provided on the shaft and enables an operation by an operator. The operation handle may be arranged such that two grip portions that the operator holds with the right hand and the left hand are displaced forward and backward in the extending direction of the shaft.

  The present invention can prevent stone scattering and grass entrainment, and can also mow the grass around the fence and under the gap.

It is a figure which shows the structural example of the mower concerning one Embodiment. It is a figure which illustrates the shape of an upper rotary blade and a lower rotary blade. It is a figure which illustrates the cross section of a blade main body. It is a perspective view which illustrates a blade main part and its circumference. (A) is a perspective view which illustrates the shape of the member which comprises the 1st screen part. (B) is a perspective view which illustrates the shape of the 2nd screen part. It is the top view which looked at an example of a blade main part from the upper part. It is a figure which illustrates a mode that an operator cuts grass using the mowing machine concerning one embodiment. It is a perspective view which illustrates the blade main body of the state which rotated the 2nd screen part to the shaft side, and its periphery. It is a perspective view which illustrates the state in which the grass around a fence is cut with the mower in the state where the 2nd screen part was rotated to the shaft side. It is a perspective view which illustrates the blade main body and its periphery in the modification of a mower. (A) is a figure which illustrates the state which looked at the grounding rotation board from the lower part. (B) is sectional drawing which illustrates typically a hole part, a plate member, and a stainless steel sheet. It is a figure which illustrates the method of attaching or detaching an expansion spring ring at the time of replacement | exchange of a lower rotary blade. It is a perspective view which illustrates the shaft in the other modification of a mower, an operation handle, and its periphery. It is a figure which illustrates a mode that an operator cuts grass using the other modification of a mower.

  Hereinafter, an embodiment of a mower will be described with reference to the drawings. FIG. 1 shows a configuration example of a mower 1 according to an embodiment. The mower 1 has a receiving tool 4 on which a hook 3 provided on a hanging strap 2 is locked, and a hollow shaft 6 provided with an operation handle 5. The hanging string 2 is used to support the mower 1 with the worker's body. The hanging strap 2 may be attached to the receiver 4 in advance and integrated with the shaft 6. The operation handle 5 is attached to the shaft 6 by a joint tool 5 ′, and grip portions 5 ″ and 5 ″ are provided at both ends raised in the shape of a deer.

  The drive machine 7 is provided at the proximal end portion of the shaft 6 and drives the blade main body 8 provided at the distal end portion of the shaft 6. The driving machine 7 and the blade main body 8 are connected via a shaft 9 provided inside the shaft 6. The driving machine 7 is configured to obtain a driving force for rotating the shaft 9 by, for example, a small gasoline engine. Further, the driving machine 7 can adjust the rotation speed and horsepower by operating one finger (for example, thumb) of the operator holding the grip portions 5 ", 5". The drive machine 7 may have a configuration including another power source as long as sufficient output can be obtained.

  The blade main body 8 is a two-blade device having an upper rotary blade 10, a lower rotary blade 11, a circular upper cover 12, a gear box 13, a grass receiving plate 14, and a ground rotary plate 15 (described later with reference to FIG. 3). The shaft 6 is detachable. The blade main body 8 may not be limited to one having two blades.

  The upper rotary blade 10 and the lower rotary blade 11 are rotated in different directions by the driving force of the driving machine 7 transmitted through the shaft rod 9 and the gear box 13, and the grass is sandwiched and mowed. FIG. 2 is a diagram illustrating the shapes of the upper rotary blade 10 and the lower rotary blade 11. The upper rotary blade 10 is a rotary blade provided with a plurality of blade portions 16 on the circumference. The upper rotary blade 10 is attached to the second rotary body 29 ′ (FIG. 3) by inserting a pin 31 described later with reference to FIG. 3 into the pin hole 17. The lower rotary blade 11 is a rotary blade in which a plurality of blade portions 18 are provided on the circumference in a direction opposite to the upper rotary blade 10. The lower rotary blade 11 is attached to the first rotary body 29 (FIG. 3) by inserting a pin 30 described later with reference to FIG. 3 into the pin hole 19.

  The circular upper cover 12 (FIG. 1) covers the upper surface of the upper rotary blade 10 with a curved surface so that the blade portion 16 of the upper rotary blade 10 and the blade portion 18 of the lower rotary blade 11 protrude from each other, and the gap is reduced to reduce the grass. It is a cover that prevents entrainment. The grass receiving plate 14 is a partition shape (for example, plate-shaped) that can be erected so as to partition the region on the upper surface side of the circular upper cover 12 into two regions (for example, a region in the mowing direction and a region in the opposite direction). It is a member. A specific example of the grass receiving plate 14 will be described in detail with reference to FIGS.

  The protection plate 37 is a member that is provided on the blade main body 8 side of the shaft 6 and protects the operator from stones scattered by the blade main body 8 when the operator operates the mower 1 to cut grass.

  Next, an example of driving the upper rotary blade 10 and the lower rotary blade 11 will be described. FIG. 3 is a diagram illustrating a cross section of the blade main body 8. In FIG. 3, the blade main body 8 with the grass receiving plate 14 removed is shown. The shaft receiver 20 fixes the end of the inserted shaft 6 (FIG. 1) by fastening with a screw (not shown), and the tip gear 22 fixed to the end of the shaft rod 9 is connected to the relay gear 23 in the gear box 13. Engage.

  The relay gear 23 transmits the driving force transmitted from the tip gear 22 to the bevel gear 24 that rotates coaxially with the relay gear 23. The bevel gear 24 rotates the two driven gears 25 and 25 ′ provided in the gear box 13 in opposite directions. A circular case 26 is screwed to the lower side of the circular upper cover 12.

  In the circular case 26, an upper case gear 27 and a lower case gear 27 'are provided rotatably. The case internal upper gear 27 and the case internal lower gear 27 'are respectively connected to the driven gears 25 and 25' and meshed with the upper drive gear 28 and the lower drive gear 28 'that rotate in the reverse direction substantially horizontally. Accordingly, when the driven gears 25 and 25 'rotate in the opposite directions, the case upper gear 27 and the case lower gear 27' also rotate in the opposite directions.

  A first rotating body 29 is connected to the upper gear 27 in the case. A second rotating body 29 'is connected to the lower gear 27' in the case. Further, the first rotary body 29 is configured such that the lower rotary blade 11 and the ground rotary plate 15 are overlapped and connected by a plurality of pins 30. The second rotary body 29 ′ has the upper rotary blade 10 coupled thereto by a plurality of pins 31.

  Therefore, the upper rotary blade 10 and the lower rotary blade 11 rotate coaxially and reversely to each other as the shaft rod 9 rotates. An expanding spring ring 32 biased in the reduction direction is locked to the heads of the plurality of pins 30 that are connected to the first rotating body 29, the lower rotary blade 11, and the ground rotary plate 15. The ground rotating plate 15 is fixed so as not to come off. Therefore, the operator can perform the mowing work by moving the blade main body 8 while bringing the ground rotating plate 15 into contact with the ground.

  Next, a configuration example of the grass receiving plate 14 will be described with reference to FIGS. FIG. 4 is a perspective view showing the blade main body 8 and its periphery. FIG. 5 is a perspective view showing members constituting the grass receiving plate 14. FIG. 5A is a perspective view showing the shape of members constituting the first partition 40. FIG. 5B is a perspective view showing the shape of the second partition 42. FIG. 6 is a plan view of the blade main body 8 as viewed from above. The grass receiving plate 14 is formed, for example, by cutting, bending, drilling, fastening (crimping), welding, or the like on an aluminum plate having a thickness of 2 mm, but is not limited thereto. Absent.

  The grass receiving plate 14 is provided in a partition shape on the upper surface of the circular upper cover 12, for example, on the extension line of the shaft 6, and receives the grass cut by the blade main body 8. In this case, the grass receiving plate 14 folds the upper surface of the circular upper cover 12 into a half facing the mowing direction A (FIG. 6) and a half facing the reverse direction B. The operator may move the blade main body 8 in the mowing direction A to mow the grass, and mow the remaining grass after moving the blade main body 8 in the reverse direction B.

  The grass receiving plate 14 is, for example, a first partition 40 that is raised in a partition shape with respect to the circular upper cover 12, and a second partition that is attached to the first partition 40 so as to be rotatable at an angle within a predetermined range, for example. Part 42. The first partition 40 includes, for example, a first member 44, a second member 46, and a third member 48.

  The first member 44 is configured by fastening the support member 50, the plate member 51, the adjustment member 52, and the adjustment member 53 with, for example, a crimping member such as a rivet (not shown). For example, the height L1 is set to 120 mm to 150 mm. Yes. The support member 50 is bent at a right angle, for example, and supports the first member 44 so as to stand on the upper surface of the circular upper cover 12.

  The plate member 51 is a member that forms a screen for receiving grass on the upper surface side of the circular upper cover 12 on the shaft 6 side. Further, the plate member 51 has a bent portion 54 that is curved toward the mowing direction A on the shaft 6 side. The bending portion 54 is provided with a guide portion 56 that guides the grass in the mowing direction A side along the circular upper cover 12. The guide portion 56 guides the grass in the direction in which the bending portion 54 is bent, and prevents the grass held by the grass receiving plate 14 from slipping out in the reverse direction B side. Further, a plurality of holes 58 for connecting the first member 44 and the third member 48 are provided below the bent portion 54.

  The adjustment member 52 and the adjustment member 53 are overlapped with the plate member 51, so that the distance between the support member 50 and the second member 46 when the first member 44 and the second member 46 are coupled is set to the second partition portion. It is adjusted to match the thickness of 42. The spacing between the support member 50 and the second member 46 may be further made wider than the thickness of the second partition portion 42 by providing an adjustment member (not shown).

  The first member 44 is provided with a plurality of holes 60 in a portion where the support member 50, the plate member 51, the adjustment member 52, and the adjustment member 53 are overlapped. In addition, the first member 44 is provided with a hole 62 in the upper portion of the plate member 51 for coupling the second partition portion 42.

  The second member 46 is bent at a right angle, for example, and supports the first member 44 so as to stand on the upper surface of the circular upper cover 12. The second member 46 is provided with a plurality of hole portions 64 at positions facing the hole portions 60 of the first member 44. And the 1st member 44 and the 2nd member 46 are couple | bonded by using the fixing member 66 for the hole 60 and the hole 64, respectively. The fixing member 66 is configured by, for example, a hexagon bolt and a nut.

  The third member 48 includes a support portion 68 formed so as to be wound around the shaft receiver 20 from below, and a coupling portion 72 provided with a plurality of holes 70 for coupling to the first member 44. And have. The third member 48 and the first member 44 are coupled by using, for example, a fixing member 73 in the hole 70 and the hole 58. The fixing member 73 is configured by, for example, a plus screw (or bolt) and a nut.

  The first partition 40 is fixed to the upper portion of the circular upper cover 12 by combining the first member 44, the second member 46, and the third member 48. The first partition 40 may be provided with a protrusion on the circular upper cover 12 side so that the protrusion engages with a hole formed on the upper surface of the circular upper cover 12.

  The second partition portion 42 is configured by an intermediate plate member 74 sandwiched between an inner plate member 76 and an outer plate member 78 and fastened by a crimping member such as a rivet (not shown). The middle plate member 74 is a member that forms a screen for receiving grass on the upper surface side of the circular upper cover 12 on the side opposite to the shaft 6. Further, the intermediate plate member 74 has a bent portion 80 whose anti-shaft 6 side is curved toward the mowing direction A. The outer plate member 78 is a member that forms a screen for receiving grass on the upper surface side at the substantially center of the circular upper cover 12.

  The inner plate member 76 is provided with a hole 82 for coupling the second partition 42 to the first member 44. The outer plate member 78 is provided with a hole 83 at a position facing the hole 82. And the 2nd screen part 42 and the 1st member 44 are couple | bonded by using the fixing member 86 for the hole part 82, the hole part 83, and the hole part 62, for example. The fixing member 86 is constituted by, for example, a hexagon bolt and a nut. Note that the second partition portion 42 may not be strongly fixed by the fixing member 86 but may be rotatable at an angle within a predetermined range around the fixing member 86.

  Since the grass receiving plate 14 configured in this way is provided with a bending portion 54 on the shaft 6 side (base end side) and a bending portion 80 on the side opposite to the shaft 6 (tip end side), the blade main body 8 Can be used to hold the mowed grass as if it were a sword. In addition, the bending part 80 is provided so that the outermost end may be inside about 5 mm from the imaginary circle passing through the outer ends of the blade part 16 of the upper rotary blade 10 and the blade part 18 of the lower rotary blade 11. Thereby, the grass receiving plate 14 can reliably hold the grass cut by the blade main body 8.

  Next, preparation for mowing work using the mower 1 and a mowing method will be described (see FIG. 3). First, in order to attach the upper rotary blade 10 and the lower rotary blade 11, the operator turns the blade main body 8 provided at one end of the shaft 6 in the reverse direction (facing up) so that the lower rotary blade 11 side is up, The first rotating body 29 and the second rotating body 29 ′ are exposed. Next, the operator couples the upper rotary blade 10 to the second rotary body 29 ′ using the plurality of pins 31, and uses the plurality of pins 30 to the first rotary body 29 and the lower rotary blade 11 and the ground rotary plate. 15 are overlapped and combined. Thereafter, the operator fixes the lower rotary blade 11, the ground rotary plate 15, and the plurality of pins 30 using the expanding spring ring 32.

  Then, the worker performs mowing work by the following method using the mower 1. FIG. 7 is a diagram illustrating a state in which an operator performs mowing using the mowing machine 1 (mowing condition). First, the driving machine 7 is started (the engine is started), the hanging string 2 is hooked, the hook 3 of the hanging string 2 is locked to the support 4 provided on the shaft 6, and the mowing machine 1 is set aside. Adhere closely. Thereafter, the grip portion 5 ″, 5 ″ of the operation handle 5 is grasped with both hands, and a mowing posture is created for operating (shaking) the blade main body 8 provided at the tip of the shaft 6.

  When starting mowing, the rotational speed of the driving machine 7 is maximized by, for example, an accelerator operation using the operation handle 5, the operator's body (body side) is fixed as an axis, and the shaft 6 is held by the hand holding the operation handle 5. The blade main body 8 at the tip is shaken toward the mowing direction A. By maximizing the rotation speed of the blade main body 8, it is possible to reduce the burden on the blade portion 16 and the blade portion 18 when mowing the grass and to increase the mowing speed.

  The operation of shaking the blade main body 8 can be performed by sliding the ground rotating plate 15 that rotates integrally with the lower rotary blade 11 while being in contact with the ground, and thus is easy and less burdensome. When the upper rotary blade 10 and the lower rotary blade 11 are rotated in parallel to the ground, the circular upper cover 12 covers a part above the upper rotary blade 10. Since the blade main body 8 is a two-blade having an upper rotary blade 10 and a lower rotary blade 11, it can be mowed with two blades so that the hair is cut with a hair clipper.

  Further, since the blade main body 8 is provided with the grass receiving plate 14, the grass cut by the blade main body 8 is held so that the grass receiving plate 14 grips the hook. The grass held on the grass receiving plate 14 is transported to a turn position where the blade main body 8 is turned while preventing scattering of stones and the like, and a grass cage is constructed at the turn position. This grass fence becomes a scattering prevention wall that prevents scattering of stones and the like.

  Conventionally, a mowing sheet in a park or school yard has required a curing sheet to prevent scattering of stones and the like. When mowing using the mowing machine 1 according to the embodiment, in order to serve as a curing sheet to receive the grass held by the grass receiving plate 14 and the stones scattered by the grass fence constructed in the turn position, Even if there are children or adults near the mowing area, mowing can be performed without any problems. In addition, when mowing around the parking lot by using the mower 1 according to the embodiment, it is possible to prevent scattering of stones and flying of dust with grass that has been cut without spreading a curing sheet. Can do.

  As described above, when the height L1 of the grass receiving plate 14 is set to 120 mm to 150 mm, even if the height of the grass is long (for example, 1 m), the grasping portion of the trunk of the grass at the moment of cutting and after cutting is grasped. Can be held up to the turn position. Further, when the height L1 of the grass receiving plate 14 is set to 120 mm to 150 mm, even when the grass is short, the cut grass can be reliably held on the circular upper cover 12 to the turn position. . The grass held by the grass receiving plate 14 encloses stones and the like to prevent scattering.

  When the predetermined twist about the operator's body is finished and the blade main body 8 is turned (returned) in the reverse direction B, the grass held by the grass receiving plate 14 is left in the turn position. That is, the grass cut by swinging the blade main body 8 left and right is collected in a hook shape at the turn position of the blade main body 8, and becomes a scattering prevention wall that prevents scattering of stones and the like.

  Therefore, when mowing is performed using the mower 1, the work of collecting scattered grass with a rake or the like becomes unnecessary. Further, since the cut grass is carried to the turn position, the state after cutting the grass can be checked each time, and when there is an uncut portion, it can be cut when the blade main body 8 is returned. . In addition, when the rotation speed of the blade main body 8 is maximized, when the blade main body 8 is returned to the direction of the reverse direction B, the remaining hair when the grass is cut in the direction of the mowing direction A. Such grass can also be cut and rooted.

  A park or the like may be surrounded by a fence or the like. If the grass receiving plate 14 having a height of, for example, 120 mm to 150 mm is provided on the circular upper cover 12, the grass may not be cut to the fence. The mower 1 can rotate the second partition 42 around a fixed member 86 at an angle within a predetermined range.

  FIG. 8 is a perspective view showing the blade main body 8 and its periphery in a state where the second partition 42 is rotated to the shaft 6 side. As shown in FIG. 8, in the mower 1, when the second partition 42 is rotated to the shaft 6 side, the height L2 of the grass receiving plate 14 on the side opposite to the shaft 6 (tip side) becomes, for example, about 5 cm or less. .

  FIG. 9 is a perspective view showing a state in which the grass around the fence 100 is being mowed by the mower 1 in a state where the second partition 42 is rotated toward the shaft 6 side. As shown in FIG. 9, when the second partition portion 42 is rotated toward the shaft 6 (base end side), the second partition portion 42 is rotated toward the opposite shaft 6 side (tip end side). In addition, since the height of the grass receiving plate 14 is lowered, the blade main body 8 can be put into the gap under the fence 100. Further, when the second partition portion 42 is rotated toward the shaft 6 side, the bent portion 80 (see FIGS. 4 and 6) is also removed from the fence 100 when the height of the gap below the fence 100 is lower than 5 cm. Since it is kept away, the blade 16 and the blade 18 can mow the grass at the fence 100. Therefore, the mower 1 can mow the grass around the fence 100. In addition, the 2nd screen part 42 is not limited to rotating, For example, you may be comprised so that it may open / close with the 1st screen part 40, or may move in a predetermined range.

  Thus, the mower 1 has the grass receiving plate 14 in which the height of the predetermined range can be easily changed by rotating the second partition 42. For this reason, the mowing machine 1 performs the second mowing by preventing the scattering of stones and the entrainment of the grass when the second screen portion 42 of the grass receiving plate 14 is rotated to the side opposite to the shaft 6 (the tip side). When the screen part 42 is rotated to the shaft 6 side (base end side), mowing of the periphery of the fence 100 and the lower gap can be performed efficiently and easily. In a park or the like, for example, it must be confirmed that there is no person within 15 m of the surrounding area for mowing, but the mower 1 can safely perform mowing work if there is no person in the operating range. Further, even when mowing the grass mower 1 in a parking lot or a courtyard of the housing complex, the mower 1 does not generate dust when mowing the grass, and the grass held by the grass receiving plate 14 and the grass receiving plate 14 are in the turn position. Scattering of stones and the like can be prevented by the constructed grass fence.

  A mowing test using the mowing machine 1 was performed. The mowing test was conducted in a city park (Akiruno City Flower Park) with permission from Akiruno City. Usually, a riding or hand-held mower is used in large parks, but in this mowing test, mowing was performed using the mower 1 for 7 days (42 hours). In this mowing test, three upper rotary blades 10 and lower rotary blades 11 are prepared, and the upper rotary blade 10 and the lower rotary blade 11 are replaced every two hours, thereby cutting the blade portion 16 and the blade portion 18. The work efficiency was improved by maintaining the work.

  The grass collected in a basket was packed in a collection bag and carried out. It was not necessary to collect grass with a rake, so we were able to work efficiently just by doing the final cleaning work. In this mowing test, there were many types of grass, such as long grass and soft fallen grass, but the work could be completed without any trouble for 42 hours. It was also possible to mow the grass at the time of parks and installations. As a result of the mowing test, the surface after cutting the grass has no convexity of grass roots that stumbles the foot, and the grass around the fence and under the gap has also been cut, and the impression that it was safe and beautiful There were many voices from local residents who stated.

  Next, a modification (mowing machine 1a) of the mowing machine 1 will be described. FIG. 10 is a perspective view illustrating the blade main body 8a and the periphery thereof in the mower 1a. In addition, in the mower 1a shown in FIG. 10, the same code | symbol is attached | subjected to the part substantially the same as the part which comprises the mower 1 mentioned above.

  The blade main body 8a is provided with a hole penetrating from the upper surface to the lower surface in the central portion in order to prevent grass or the like from being caught in the portions serving as the rotation shafts of the upper rotary blade 10 and the lower rotary blade 11. It has a donut-like configuration without a core. The blade main body 8a is configured to rotate the upper rotary blade 10 and the lower rotary blade 11 in different directions by the driving force transmitted through the gear box 13, and to sandwich and cut the grass.

  The circular upper cover 12a covers a part of the upper side of the upper rotary blade 10 with a curved surface so that the blade portion 16 of the upper rotary blade 10 and the blade portion 18 of the lower rotary blade 11 are exposed, and the gap with respect to the upper rotary blade 10 is reduced. This is a cover that prevents the grass from getting caught. As described above, the blade main body 8a is formed in a donut shape, and the circular upper cover 12a is opened with, for example, a hole 90 provided in the center. As described above, when the central portion of the circular upper cover 12a is opened, the upper covering member 92 that covers the hole 90 from above may be provided.

  The upper covering member 92 is, for example, a stainless steel sheet coated with an adhesive on one side, and covers the hole 90 from above by being attached to the circular upper cover 12a. The upper covering member 92 may be affixed, for example, to a circular rubber plate on the surface on the hole 90 side so as not to expose the surface to which the adhesive is applied. The circular upper cover 12a and the upper covering member 92 prevent foreign matter such as grass powder, soil, or stone from entering the drive system around the upper rotary blade 10 and the lower rotary blade 11 from above. The circular upper cover 12a is not provided with the hole 90 (or the upper covering member 92 is integrated), and the grass powder from above is applied to the drive system around the upper rotary blade 10 and the lower rotary blade 11 or the like. It may be configured to prevent foreign matter such as soil or stone from entering.

  FIG. 11 is a diagram showing the shape of the ground rotating plate 15a of the mower 1a. FIG. 11A is a diagram illustrating a state in which the ground rotating plate 15a is viewed from below. FIG. 11B is a cross-sectional view schematically illustrating the hole 96 and the plate member 97. The ground rotating plate 15a is provided with a plurality of pin holes 94 on the circumference. The ground rotary plate 15a is also coupled to the lower rotary blade 11 by passing a plurality of pins 95 through the pin holes 94, and rotates together with the lower rotary blade 11 in the same manner as the ground rotary plate 15 shown in FIG.

  As described above, the blade main body 8a of the mower 1a is configured in a donut shape, and the ground rotating plate 15a is opened with a hole 96 having a depth L3 of about 5 mm, for example, at the center. The ground rotary plate 15a covers a part of the lower rotary blade 11 on the lower side so that the blade portion 16 of the upper rotary blade 10 (see FIG. 10) and the blade portion 18 of the lower rotary blade 11 are exposed. Reduce the gap between and prevent the entrainment of grass.

  When the center rotating plate 15a is opened in a circular shape, for example, a plate member 97 that closes the hole 96 may be provided. The plate member 97 is, for example, a circular aluminum plate having a diameter slightly smaller than the hole 96 and a thickness of 1 mm. The plate member 97 is fixed by, for example, an adhesive (not shown) from the upper side and the lower side so as to close the hole 96 with respect to the ground rotating plate 15a. For example, the plate member 97 closes the hole 96 while making a recess having a depth L4 of about 2 mm with respect to the hole 96. The ground rotating plate 15a to which the plate member 97 is fixed by an adhesive is mixed with foreign matter such as grass powder, earth or stone from below into the drive system around the upper rotary blade 10 and the lower rotary blade 11. To prevent.

  The ground rotating plate 15a is not provided with the hole 96 (or the plate member 97 is integrated with the ground rotating plate 15a), and is connected to a drive system around the upper rotary blade 10 and the lower rotary blade 11 or the like. You may comprise as a lower coating | coated member which prevents that foreign materials, such as grass powder, soil, or a stone, mix from the downward direction.

  Expanded spring rings 98 biased in the reduction direction are locked to the heads of the plurality of pins 95, and are fixed so that the ground rotating plate 15a does not come off. The expansion spring ring 98 is provided with two holes 99 for enabling attachment and detachment. Since the ground rotating plate 15a is fixed by the spreading spring ring 98, the operator can perform the mowing work by moving the blade main body 8a while the ground rotating plate 15a is in contact with the ground.

  FIG. 12 is a diagram illustrating a method for attaching and detaching the expansion spring ring 98 when the lower rotary blade 11 is replaced. When the operator attaches or detaches the lower rotary blade 11, the operator uses the radio pliers 101 or the like to loosen the urging force of the expansion spring ring 98. For example, the operator inserts the tip of the radio pliers 101 into each of the hole portions 99 of the expansion spring ring 98, causes the tip of the radio pliers 101 that penetrates the hole portion 99 to protrude about 2 mm, and then applies the bias. The expansion spring ring 98 is removed by loosening. As described above, since the plate member 97 forms a recess having a depth L4 of about 2 mm and closes the hole 96 (see FIG. 11B), the tip of the radio pliers 101 is about 2 mm from the hole 99. It can be projected. In the mowing machine 1a, the expansion spring ring 98 and the ground rotating plate 15a can be easily attached and detached, so that the lower rotary blade 11 and the upper rotary blade 10 can be easily replaced.

  Thus, according to the mowing machine 1a demonstrated using FIGS. 10-12, like the mowing machine 1 shown in FIGS. 1-9, the grass which the grass support plate 14 hold | maintains, and the grass support plate 14 put it in a turn position. Scattering of stones and the like can be prevented by the grass fence constructed, and the grass around the fence 100 and in the lower gap can also be mowed. Furthermore, according to the mower 1a, the entrainment of grass is prevented, and foreign matter such as grass powder, soil or stone is mixed into the drive system around the upper rotary blade 10 and the lower rotary blade 11 from above and below. Can be prevented.

  Next, another modified example (mowing machine 1b) of the mower 1 will be described. FIG. 13 is a perspective view illustrating the shaft 6, the operation handle 5b, and the periphery thereof in the mower 1b. In addition, in the mower 1b shown in FIG. 13, the same code | symbol is attached | subjected to the part substantially the same as the part which comprises the mower 1 mentioned above, and detailed description is abbreviate | omitted.

  The mowing machine 1b is provided with an operation handle 5b so that the operator can operate the shaft 6 on which the blade main body 8 (see FIG. 1) is fixed at the end. The operation handle 5b is arranged so that the two grip portions 5b "R, 5b" L that the operator grips with the right hand and the left hand are displaced forward and backward in the direction in which the shaft 6 extends. That is, in the mower 1b, the operation handle 5b is arranged at a different position in a different direction from the operation handle 5 of the mower 1 shown in FIG.

  For example, the grip part 5b ″ R gripped by the operator of the mower 1b with the right hand is provided so as to be closer to the drive unit 7 by about 100 mm than the grip part 5 ″ of the mower 1 shown in FIG. Further, the grip part 5b "L gripped by the operator of the mower 1b with the left hand is closer to the tip side (the blade main body 8 side: see FIG. 1) than the grip part 5" of the mower 1 shown in FIG. Is provided. That is, the deviation widths L5 and L6 shown in FIG. 13 are set to about 100 mm, for example.

  The operation handle 5b has two grip portions 5b "R, 5b" L independent of each other, and is attached to the shaft 6 by a joint tool 5b '. The joint tool 5b 'can fix the grip portions 5b "R, 5b" L in arbitrary directions by, for example, four bolts.

  FIG. 14 is a diagram exemplifying how an operator mows using the mower 1b. First, the operator holds the operation handle 5b of the mowing machine 1b suspended by the hanging strap 2 and keeps the upper rotary blade 10 and the lower rotary blade 11 (FIG. 1) substantially horizontal with respect to the ground while holding the mower 1b in the upper body. Fix in close contact. Then, the operator does not shake the mower 1b by hand, but rotates the upper body fixing the mower 1b to the left and right to move the blade main body 8 to the left and right to mow the grass.

  In this case, since the two grip portions 5b ″ R and 5b ″ L are displaced back and forth in the direction in which the shaft 6 extends, even if the operator rotates the upper body to swing left and right, the balance of the body is not easily lost. That is, it becomes easy to mow the grass while stabilizing the upper rotary blade 10 and the lower rotary blade 11 to be substantially horizontal with respect to the ground. If it becomes easy to stabilize the upper rotary blade 10 and the lower rotary blade 11 with respect to the ground and keep them substantially horizontal, it is easy to mow the grass to a length of about 5 to 10 mm.

  For example, when the grass mower 1b needs to cut grass cleanly by shortening the plant height while preventing the scattering of stones, as in the case of cutting grass in a parking lot, the upper rotary blade 10 and the lower rotary blade It is also easy to cut the grass to a length of about 5 to 10 mm by lowering the rotation number of 11.

  As described above, according to the mowing machine 1b described with reference to FIGS. 13 and 14, the grip portions 5b "R, 5b" L are arranged so as to be displaced forward and backward in the direction in which the shaft 6 extends. Further, the grass can be easily cut while keeping the lower rotary blade 11 substantially horizontal with respect to the ground. Similarly to the mowing machine 1, the mowing machine 1b can prevent scattering of stones and the like by the grass held by the grass receiving plate 14 and the grass fence constructed by the grass receiving plate 14 at the turn position. You can also mow the grass around and below. Furthermore, according to the mower 1b, it becomes easy to keep the upper rotary blade 10 and the lower rotary blade 11 stable and substantially horizontal with respect to the ground, so that it is possible to prevent the soil from flowing out by cutting the grass roots. Can be cut to a length of about 5 to 10 mm to prevent the occurrence of uneven cutting.

DESCRIPTION OF SYMBOLS 1, 1a ... Mowing machine, 2 ... Suspension string, 3 ... Hook, 4 ... Receiving tool, 5 ... Operation handle, 6 ... Shaft, 7 ... Drive machine, 8, 8a ... blade main body, 9 ... shaft rod, 10 ... upper rotary blade, 11 ... lower rotary blade, 12 ... circular upper cover, 13 ... gear box, 14 ... grass Base plate, 15, 15a ... Ground rotating plate, 16 ... Blade, 18 ... Blade, 20 ... Shaft receiver, 40 ... First partition, 42 ... Second partition , 44 ... 1st member, 46 ... 2nd member, 48 ... 3rd member, 50 ... support member, 51 ... plate member, 54 ... bending part, 56 ... Guide part, 62 ... hole, 80 ... bent part, 82 ... hole, 83 ... hole, 90 ... hole, 92 ... upper covering member, 96 ...・ Hole, 97 ・· Plate member, 98 ... expanding spring ring 98, 100 ... fence

A grass receiving plate according to one aspect of the present invention is movable with respect to a first partition that can be erected on a cover that covers at least a part of one surface of a rotary blade provided in a mower, and the first partition. and a second partition portion attached is disposed above the first partition portion so that, when the second partition part is moved to one end side, wherein the height of the other end the It is characterized in that the height of only one partition is lowered .

Claims (9)

A first partition that can be erected on a cover that covers at least a part of one surface of the rotary blade provided in the mower;
A second partition portion movably attached to the first partition portion;
The grass receiving plate, wherein the height of a predetermined range changes when the second screen part moves. The grass receiving plate according to claim 1,
The grass receiving plate according to claim 1, wherein when the second partition portion moves to one end side, the height on the other end side becomes lower than a predetermined height. In the grass receiving plate of Claim 1 or Claim 2,
The second screen part is
A grass receiving plate that rotates at an angle within a predetermined range with respect to the first partition. The grass receiving plate according to any one of claims 1 to 3,
A grass receiving plate characterized in that two ends are curved in the same direction. The grass receiving plate according to claim 4,
The first partition is
A grass receiving plate having a guide portion for guiding grass in a direction in which the two end portions are curved. The grass receiving plate according to any one of claims 1 to 5,
A mowing machine comprising the rotary blade and the cover. The mower according to claim 6,
The rotary blade is
A mowing machine having two blades which are coaxial and rotate in opposite directions. In the mowing machine according to claim 6 or 7,
An upper covering member that covers the upper portion of the rotary blade together with the cover while exposing the blade portion of the rotary blade when the rotary blade is rotated parallel to the ground;
A mowing machine, comprising: a lower covering member that covers a lower portion of the rotary blade while exposing a blade portion of the rotary blade when the rotary blade is rotated in parallel with the ground. The mower according to any one of claims 6 to 8,
A shaft in which a blade main body provided with the rotary blade is fixed to an end;
An operating handle provided on the shaft and enabling operation by an operator;
The operation handle is
A mowing machine characterized in that two grip portions, each of which an operator grips with a right hand and a left hand, are arranged so as to be displaced back and forth in the direction in which the shaft extends.

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