JP2003230305A - Weed puller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weed puller with which weeds growing on the ground are surely eliminated. <P>SOLUTION: A plurality of weed pulling pins 6 are formed in an acute shape toward the tips in which the cross sections of the pins vertical in the length direction are opened in a V shape in the rotation direction of a drum 3. A plurality of the pins 6 are arranged at equal angular intervals in the circumference direction of the drum 3, laid in a line at fixed pitches P1 in the axial direction of the drum 3, and adjoining lines L1 and L2 are shifted by pitches P2 and arranged zigzag. The drum 3 is rotated, the ground surface is deeply dug by the pins 6, weeds are uprooted and the uprooted weeds are caught by the pins 6 and pulled out from the ground surface. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weeding machine for pulling out grass growing on cultivated land or wasteland while traveling,
Especially, it relates to a structure for surely removing grass.

[0002]

2. Description of the Related Art Japanese Patent No. 3195781 discloses a weed extractor capable of efficiently extracting weeds growing on the ground such as a wide arable land or a wasteland. 12
FIG. 3 is a schematic structural diagram showing the weed extractor of the above publication. In FIG. 12, 50 is a weed extractor that travels on the ground GL in the X direction. Reference numeral 51 denotes a weed extractor main body, which includes a drum 53 rotatably supported by a fixed horizontal shaft 52 that does not rotate, and a plurality of pins arranged at equal intervals of 90 ° in the circumferential direction of the drum 53. 54a to 54d
And a plurality of pins 54a to 54d built in the drum 53
And a cam mechanism 55 (shown in FIG. 13) for projecting or retracting the drum from the peripheral surface of the drum 53. The plurality of pins 54a to 54d are circular pins each having a circular cross section perpendicular to the longitudinal direction, and are arranged in a row at a constant pitch in the axial direction of the drum 53. Reference numeral 56 is a power means for moving the weed extractor main body 51 forward in the traveling direction X, and is composed of an engine 57 as a power source and a transmission means 58 for transmitting the drive of the engine 57 to the drum 53. The transmission means 58 includes sprockets 59a to 59d and chains 60a and 60b that transmit the rotation of the sprockets 59a to 59d. 64 is a scraper for collecting the weeds extracted.
When the engine 57 is driven and the weed extractor main body 51 moves forward in the traveling direction X, the sprockets 59a and 59b and the chain 60a rotate in the Y direction in conjunction with each other, and along with this, the sprockets 59c and 59d and the chain 60b interlock. Then, the drum 53 rotates in the Z direction, which is the opposite direction to the Y direction, and the drum 53 also rotates in the Z direction.

FIG. 13 is an internal structural view of the weed extractor main body 51. In FIG. 13, reference numeral 61 denotes a cam fixed to the horizontal shaft 52 inside the drum 53, and a step portion 61a is provided on the upper portion of the cam 61. At the lower end of the step portion 61a, the radius r of the cam 61 is the minimum radius r1, the radius r gradually increases from here in the rotational direction Z of the drum 53, and the maximum radius r2 is at the bottom of the cam 61. . The radius r remains the maximum radius r2 from the lowermost portion to the step portion 61a, and when reaching the step portion 61a, the radius r becomes the minimum radius r1 again. 62a to 62
d is a pin insertion hole provided on the peripheral surface of the drum 53,
Pins 54a to 54d are inserted into and retracted from the inside of the drum 53. The pins 54a to 54d are constantly urged toward the center of the drum 53 by a spring (not shown). 63a to 63d are rollers connected to the rear ends of the pins 54a to 54d and abutting on the circumferential surface of the cam 61.

Next, the operation of each part when the weed extractor 50 having the above-mentioned configuration extracts grass is explained. First, the power means 56 is driven to drive the weed extractor main body 51.
Is moved in the X direction toward the grass on the ground GL, and the drum 53 is rotated in the Z direction by the transmission means 58. As a result, the pins 54a to 54d also rotate in the Z direction together with the drum 53, and the rollers 63a to 63d slide on the circumferential surface of the cam 61, so that the pins 54a to 54d are pin insertion holes 62a depending on the shape of the cam 61. It projects or retracts from ~ 62d. Then, at the lowermost part of the cam 61 where the radius r of the cam 61 is the maximum radius r2, the roller 63c is pushed up to the maximum by the cam 61, the pin 54c projects the maximum length from the pin insertion hole 62c, and the ground GL is dug deeply to grass. And the grass that has been dug up is pulled out from the ground GL while being hooked on the pin 54c. The grass taken out is carried to the upper part of the drum 53 while being hooked by the pin 54c, and the scraper 64
Be recovered to.

[0005]

However, in the conventional weed extractor 50 described above, the pins 54a to 54a are used.
Since d is a round pin shape, the pins 54a to 54d have a weak digging force for digging soil, and grass can be dug relatively easily on soft ground, but grass can be dug deep on hard ground. There is a problem that is difficult. In addition, there is a problem that when the grass is dug up, it is difficult for the grass to be caught by the pins 54a to 54d, and the grass cannot be dug up to be surely pulled out from the ground.

The present invention solves the above problems, and an object of the present invention is to provide a weeding machine capable of reliably removing roots of grass growing on the ground. .

[0007]

A weeding machine according to the present invention is provided with a vehicle body, traveling wheels for traveling the vehicle body, a drum rotatably supported by the vehicle body, and a drum protruding from the peripheral surface of the drum. The plurality of pins for weeding and the drive unit for rotating the drum in the direction opposite to the rotation direction of the traveling wheels are provided, and the plurality of pins are provided with edge portions for hooking the grass.

By doing so, since the soil is excavated by the edge portion of the pin as the drum rotates, the excavation force is increased and grass can be excavated even on hard ground. Moreover, when the grass that has been dug up is removed after the grass has been dug up, the grass is likely to be caught at the edge portion, and the grass can be reliably extracted from the ground.

Further, in the weeding machine according to the present invention, the plurality of pins have a shape in which a cross section perpendicular to the longitudinal direction has a concave portion opened in the rotational direction of the drum, and the grass is provided at the open end of the concave portion. An edge portion for hooking is formed.

By doing so, the pin digs the ground while receiving the soil in the recess and scooping the ground, so that the digging force of the pin for digging the ground is further increased and the grass can be uprooted even on the hard ground. it can.

Further, in the weeding machine according to the present invention, it is preferable that the plurality of pins are formed in a sharp shape toward the tip.

[0012] By doing so, even on a hard ground, the pins are more likely to enter the ground, and the grass can be dug up.

Further, in the weeding machine according to the present invention, it is preferable that the plurality of pins are arranged so as to project in a staggered manner from the peripheral surface of the drum. Here, the zigzag pattern means that a plurality of rows of pins arranged in a row at a constant pitch in the axial direction of the drum are arranged at predetermined intervals in the circumferential direction of the drum, and the pins are arranged in adjacent rows to form the pins of the drum. It means a state where they are displaced from each other in the axial direction.

By doing so, the grass that has not been dug up between the pins in any row is
Since it is dug up by the pins in the adjacent row and caught by the pins, it is possible to eliminate the unextracted grass left between the pins. Also, even if the pitch of the pins in one row is widened to some extent, there is no grass left behind, so the resistance force from the ground applied to the pins when digging up the ground can be dispersed, and the rotation efficiency of the drum can be improved. It is possible to prevent damage to the pins.

Further, in the weeding machine according to the present invention, it is preferable to provide a grass pressing portion for tilting and pressing the grass in the vicinity of the drum and in front of the traveling direction of the vehicle body.

[0016] In the case of long grass or the like, since the stalk of the grass grows straight from the ground, it is difficult for the grass to be caught on the pin. The grasses cross each other and become entangled with each other, the stems of the grasses are easily caught on the pins, and the grasses can be reliably pulled out from the ground.

Further, in the weeding machine according to the present invention, it is preferable that the plurality of pins are fixed to the drum.

By doing so, the pin always projects from the peripheral surface of the drum, and it is not necessary to provide a complicated mechanism such as a conventional cam mechanism inside the drum. Therefore, even if the dirt and sand adhering to the grass roots are hooked on the pin together with the grass that has been taken out and carried over the drum, the dirt and sand do not get inside the drum, making it difficult for the drum to rotate. It is possible to constantly dig deep into the ground and uproot the grass. Further, since the structure of the drum is simple and the weight can be reduced, maintenance of the drum is facilitated and movement of the weeding machine itself is facilitated.

Further, in the weeding machine according to the present invention, as the plurality of pins, pins bent in the rotation direction of the drum can be used.

By using such a bending pin, the grass can be uprooted from below the root, and the excavated grass can be easily hooked on the pin and reliably removed from the ground.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 are views for explaining the structure of a weeding machine according to the present invention, FIG. 1 is a right side view of the weeding machine, and FIG. 2 is a plan view of the weeding machine. 3A is a front view of the pin, and FIG. 3B is a pin A shown in FIG.
FIG. 4 (a) is a side view of the drum,
(B) is a front view of the drum. 5A is a plan view of the grass pressing portion, FIG. 5B is a right side view of the grass pressing portion, and FIG.
Is a view on arrow B in (b). FIG. 6A is a plan view of the grass receiving portion, and FIG. 6B is a right side view of the grass receiving portion.

In FIG. 1, 100 is a weeding machine.
Reference numeral 1 is a vehicle body of the weeding machine 100.
U-shaped grip frame 1a that is held by hand to support 00, support frames 1b and 1c (1c is shown in FIG. 2) that supports grip frame 1a, and grip frame 1a and support frames 1b and 1c with bolts. It is composed of connected body frames 1d and 1e (1e is shown in FIG. 2).

Reference numeral 3 denotes a drum having a hollow inside.
Root cutting blades 4a, 4b connected to close both sides of the
(4b is shown in FIG. 2) Pass the support shaft 2 through the support hole 4c,
By connecting the support shaft 2 to the lower surfaces of the body frames 1d and 1e with bolts, the drum 3 is attached to the body frame 1
It is rotatably supported by d and 1e. Root cutting blade 4a,
The cutting edge of 4b is provided with unevenness, and the cutting edge of this unevenness enters the ground to cut grass roots extending in a wide range in the ground, and the weeding work width is limited to the width of the drum 3 in the axial direction. To make it easier to remove the grass within this width. As shown in FIG. 2, protective rings 5a and 5b are attached to the side surfaces of the root cutting blades 4a and 4b to protect the support portion of the support shaft 2 that supports the drum 3, and to protect the support portion from the grass. Are prevented from getting entangled.

Reference numeral 6 denotes a plurality of pins which are erected on the drum 3 so as to project from the peripheral surface of the drum 3. The plurality of pins 6 rotate together with the drum 3 to dig up the ground and remove grass from the ground. Pin 6 is shown in FIG.
As shown in (a), it projects from the projecting hole 3a provided in the peripheral surface of the drum 3 with a predetermined projecting length S, and the connecting portion 6a at the base.
Is fixed to the inner surface of the drum 3 by spot welding or the like. The protrusion length S is 30 mm to 60 where grass is easily caught.
It is designed to have a length of mm, and about 50 mm is effective, but this may be appropriately designed according to the hardness and the condition of the ground. The width Q of the pin 6 is designed to be 12 mm to 20 mm, preferably about 15 mm, but this may also be appropriately designed according to the hardness and the condition of the ground. The main body portion 6b is shown in FIG.
As shown in (b), a cross section perpendicular to the longitudinal direction of the pin 6 is formed in a V shape and has a concave portion 6k opened in the rotation direction R of the drum 3 and the concave portion 6k.
An edge portion 6z for hooking grass is provided at the open end of k. With such a shape, the ground is dug in the R direction while excavating the grass by receiving the soil in the concave portion 6k, the grass is uprooted, and the dug grass is hooked on the edge portion 6z and extracted from the ground. Since the tip 6c of the pin 6 is formed in a sharp shape, the pin 6 steadily enters the ground and digs deep into the ground even on hard ground. As the material of the pin 6, a metal material such as stainless steel or steel subjected to anticorrosion treatment is used.

As shown in FIG. 4A, the pins 6 are arranged at equal intervals of 45 ° in the circumferential direction of the drum 3. This angular interval may be appropriately set according to the diameter of the drum 3 and the rotation speed. In addition, pin 6
As shown in FIG. 4B, the drums 3 are arranged in a row at a constant pitch P1 in the axial direction, and are arranged in a staggered pattern with a pitch P2 between adjacent rows L1 and L2.
Therefore, the row L1 has six pins 6 arranged in a row at a constant pitch P1, and the row L2 has five pins 6 arranged in a row at a constant pitch P1. Regarding the dimensions of the pitches P1 and P2, the pitch P1 is 40 to 60 mm, the pitch P2 is half of the pitch P1, and 20 to 30 mm is effective, but this dimension is the width of the drum 3 in the axial direction and the grass growing on the ground. It may be appropriately designed according to the density of the. Also, the number of pins to be arranged may be appropriately designed in the same manner. By arranging the plurality of pins 6 in a zigzag manner in this way, it is possible to reliably remove grass without leaving any grass while dispersing resistance from the ground, as will be described later.

Reference numeral 7 denotes a drive unit composed of an engine, a motor, etc., which is fixed to the upper surfaces of the body frames 1d and 1e. Reference numeral 7a is a tank containing fuel for driving the engine of the drive unit 7. The drum 3 is rotated by transmitting the driving force of the driving unit 7 in the following order. First, the driving force of the drive unit 7 is transmitted to the sprocket 8 via the shaft portion 8a, and the sprocket 8 rotates in the V direction. The rotation of the sprocket 8 is transmitted to the sprocket 10 by the drive chain 9, and the sprocket 10 also rotates in the V direction. Next, the rotation of the sprocket 10 in the V direction is transmitted to the inside of the drive converting portion 11 via the shaft portion 10a, and inside the drive converting portion 11, the upper drive shaft 12 arranged perpendicular to the shaft portion 10a. Is converted to rotation in the R direction. When the upper drive shaft 12 rotates in the R direction, the sprocket 13 fixed to the upper drive shaft 12 also rotates in the R direction, and the sprocket 15 rotates in the R direction by the drum chain 14. Since the sprocket 15 is fixed to the root cutting blade 4a connected to the side surface of the drum 3 with the screw 16, the drum 3 rotates in the R direction as the sprocket 15 rotates.

Reference numerals 17a and 17b (17b is shown in FIG. 2) are traveling wheels for traveling the weeding machine 100 and advancing the drum 3 in the F direction of FIG. 1, and are used for weeding work, even on hard ground or soft ground. However, a plurality of blade members 17c that bite into the ground and reliably run the weeding machine 100 are provided on the outer peripheral portion. The traveling wheels 17a and 17b rotate by receiving the driving force of the drive unit 7 as in the drum 3. The order of this transmission is the same as when the drum 3 described above is rotated until the drive force of the drive unit 7 is transmitted and the upper drive shaft 12 rotates in the R direction. Then, as the upper drive shaft 12 rotates in the R direction, the gear 18 fixed to the upper drive shaft 12 also rotates in the R direction, and the gear 19 meshing with the gear 18 rotates in the W direction. Since the gear 19 is fixed to the lower drive shaft 20, the lower drive shaft 20 rotates in the W direction, and the sprocket 2 fixed to the lower drive shaft 20 is rotated.
1 also rotates in the W direction. The rotation of the sprocket 21 is transmitted to the sprocket 23 by the traveling wheel chain 22, the sprocket 23 rotates in the W direction, and the traveling wheel shaft 24 to which the sprocket 23 is fixed also rotates in the W direction. As a result, the traveling wheels 17a and 17b fixed to both ends of the traveling wheel shaft 24 rotate in the W direction, whereby the weeding machine 100 travels in the F direction, and
The drum 3 rotates in the R direction and advances in the F direction. The rotation direction R in which the drum 3 rotates is opposite to the rotation direction W in which the traveling wheels 17a and 17b described above rotate. In this way, by making the rotating direction of the drum 3 reverse to the rotating direction of the traveling wheels 17a, 17b, the pins 6 arranged on the peripheral surface of the drum 3 dig deep into the ground, uproot the grass, and pull it out. go.

Reference numeral 25 is a grass pressing portion provided near the drum 3 and in front of the running direction F of the weeding machine 100. As shown in FIG. The body frames 1d and 1e are connected so as to be close to each other at a distance D1. The grass retainer 25 includes a main body 25a and a plurality of combs 25b welded to the main body 25a,
As shown in FIG. 5A, two comb portions 25b are arranged between the pins 6d and 6e of the row L1, and the pins 6f of the adjacent row L2 pass through between the two comb portions 25b. Ten pieces are arranged at such a pitch P3. This comb part 25
The number of b's may be set according to the number of pins 6. As shown in FIG. 5 (b), the grass pressing portion 25 presses the grass G, which has a long length and the stem grows straight from the ground, in front of the drum 3 to be pressed down, and as shown in FIG. 5 (c). As shown, the grasses G intersect and become entangled. Then, the grass G that intersects and is entangled with each other is separated by a predetermined distance D1.
Then, the pin 6 of the adjacent drum 3 is hooked and pulled out. About 50 mm to 100 mm is effective as the predetermined interval D1, but this value is set based on the type of grass and the protruding length S of the pin 6.

Reference numeral 26 denotes a grass receiving portion which is provided above the drum 3 and in the vicinity of the drum 3, and which includes the supporting frames 1b and 1c.
Are connected to the connecting members 27a and 27b (27b is shown in FIG. 2) welded to each other by bolts. Grass receiving part 2
As shown in FIG. 6A, 6 is composed of a main body portion 26a and a plurality of comb portions 26b welded to the main body portion 26a. The plurality of comb portions 26b are located between the pins 6g and 6h of the row L3. Two lines are arranged, and the adjacent row L is between the two comb parts 26b.
Four pins 6i are arranged at a pitch P4 such that they can pass through, and two pins are arranged between the endmost pins 6j and 6g and the root cutting blades 4a and 4b, so that a total of 12 pins are arranged. The number of combs 26b may be set according to the number of pins 6. The pitch P4 is the pitch P3 of the comb portion 25b of the grass pressing portion 25.
Is the same as As shown in FIG. 6B, the grass G caught by the pin 6 and taken out by the grass receiving portion 26 is scooped up by the comb portion 26b and separated from the pin 6 while brushing off the soil attached to the root. It Further, when a bucket 28 (illustrated by a two-dot chain line in FIG. 1) for collecting the grass G separated from the pin 6 is attached to the rear portion of the grass receiving portion 26, the grass receiving portion 26 is obliquely fixed, The separated grass G can automatically enter into the bucket 28 to facilitate the post-treatment of the grass G.

Reference numeral 29 denotes an auxiliary tire provided at the rear of the weeding machine 100, which has support arms 32a and 32b (32b).
Is rotatably supported via a wheel shaft 33 (shown in FIG. 2). The support arms 32a and 32b are fixed members 30.
a, 30b (30b is shown in FIG. 2), a rotary bolt 31
a and 31b (31b is shown in FIG. 2) are rotatably connected, and the fixing members 30a and 30b are connected to the support frames 1b and 1c by welding. Auxiliary tire 2
The reference numeral 9 denotes the drum 3 when the weeding machine 100 is moved before and after the weeding operation, or when the weeding operation is performed on soft ground.
This is a tire to prevent the car from getting into the ground and being unable to move forward. Further, the support plates 32a, 32b are fixed to the fixing members 30a, 30b between the fixing plates 34a,
34b (34b is shown in FIG. 2) is connected and rotates together with the support arms 32a and 32b. The fixing plate 34a is provided with fixing holes 34c, 34d, 34e, and the lock portion 35a attached to the fixing member 30a.
The lock pin 36a of the above penetrates the fixing member 30a and is inserted into the fixing holes 34c, 34d, and 34e, so that the auxiliary tire 29 is fixed at any position of the solid line position, the chain double-dashed line position, and the broken line position.

That is, the lock pin 36a is fixed to the fixing member 3.
When the auxiliary tire 29 is inserted through the fixing hole 34c through 0a, the auxiliary tire 29 is fixed at the solid line position. When moving the weeding machine 100 before and after the weeding operation, the auxiliary tire 29 is lowered to this position and grounded on the ground. At this time, the pin 6 of the drum 3 is in a state of floating from the ground.
Weeding machine 1 using auxiliary tire 29 without being disturbed by
00 can be moved. Also, the lock pin 36
When a passes through the fixing member 30a and is inserted into the fixing hole 34d, the auxiliary tire 29 is fixed at the position of the chain double-dashed line above the drum 3. Since the auxiliary tire 29 is not necessary when performing a normal weeding operation, the auxiliary tire 29 is flipped up and fixed at this position. When the lock pin 36a penetrates the fixing member 30a and is inserted into the fixing hole 34e, the auxiliary tire 29 is fixed at the position indicated by the broken line. When performing weeding work on soft ground, the auxiliary tire 29 is lowered to this position and grounded on the ground. At this time, the auxiliary tire 29 can prevent the drum 3 from sinking into the soft ground. Similarly, the fixing plate 34b is also provided with a fixing hole, and the lock pin 36b of the lock portion 35b is provided.
Penetrates the fixing member 30b and is inserted into the fixing hole, so that the auxiliary tire 29 is fixed at a predetermined position.

Next, the operation of the weeding machine 100 when weeding will be described. FIG. 7 shows a weeding machine 100 according to the present invention.
It is a figure explaining the weeding operation of. FIG. 7A shows a state in which the drum 3 is moving forward in the F direction toward the grass G.
At this time, the drum 3 rotates in the R direction that is the opposite direction to the rotation direction W (shown in FIG. 1) of the traveling wheels 17a and 17b that advances the drum 3 in the F direction, and the pin 6 at the lowest position of the drum 3 is rotated. Enters the ground GL and digs deep into the ground GL. When the drum 3 advances to the front of the grass G, FIG.
As shown in FIG.
(B)) The ground G near the root of the grass G struck by
Dig L deep into the bottom of the grass G root. Then, when the drum 3 rotates in the R direction while advancing, the pin 6d also rotates in the R direction, and the pin 6d digs up the grass G from the lower part of the root, as shown in FIG. 7C.
Further, when the pin 6d rotates in the R direction together with the drum 3, as shown in FIG. 7D, the pin 6d catches the grass G and completely pulls it out of the ground GL.

In the above operation, even if the ground GL is hard, the tip 6c of the pin 6 has a sharp shape as shown in FIG. 3 (a), so that the pin 6 can easily penetrate deep into the ground. The cross section of the body portion 6b of the pin 6 is shown in FIG.
The concave portion 6k opened in the rotation direction R of the drum 3 as shown in (b)
Since it is formed in a shape having, the ground 6 is digging while receiving the soil in the recess 6k and scooping it, so that the excavation force for digging the ground GL is increased and the grass G can be uprooted. Then, the grass G is placed at the opening end of the recess 6k.
Since the edge portion 6z for hooking the grass is formed, when the grass G dug up is caught by the pin 6 and pulled out, the grass G is easily caught by the edge portion 6z, and the grass G can be reliably pulled out from the ground GL. It will be possible. Further, since the plurality of pins 6 are arranged in a zigzag pattern on the circumferential surface of the drum 3, the grass G that has not been extracted between the pins 6d and 6e in the row L1 in FIG. Since it is pulled out by the pin 6f of the row L2, the grass G
It becomes possible to reliably remove the grass G from the ground GL by eliminating the leftover residue. Further, due to the arrangement of the staggered pins 6, even if the pitch P1 of the pins 6 in one row is widened to some extent, the grass G is not left behind. Therefore, when the ground GL is dug up, the resistance from the ground GL is applied to the pins 6. By distributing the force, the rotation efficiency of the drum 3 can be improved, and the pin 6 can be prevented from being damaged. In addition, since the grass pressing portion 25 is provided close to the drum 3, even if the grass G is long and the stem of the grass G grows straight from the ground, Since the grass G is easily caught on the pin 6 by tilting and holding down the grass G so that the grasses G cross each other and are entangled with each other, the grass G can be reliably removed from the ground. Furthermore, since the pin 6 is fixed to the drum 3, it is not necessary to provide a complicated mechanism such as a cam mechanism shown in FIG. Even if it gets into the inside of the drum, it will not be difficult for the drum 3 and the pin 6 to rotate. Further, since the structure of the drum 3 can be simplified and reduced in weight, maintenance of the drum 3 can be facilitated and the weeding machine 100 can be moved easily.

In the embodiment described above, the drum 3
The pin 6 fixed to the drum 3 is straightly projected from the peripheral surface of the drum 3 as an example, but the present invention is not limited to this. Besides this, as shown in FIG. 8A, it is also possible to use a bent pin 37 in which the pin is bent in the R direction in which the drum 3 rotates. By doing so, as shown in FIG. 8B, when pulling out the grass G, the grass can be dug up from below the root with the bending pin 37, and the dug up grass G can be easily hooked,
It is possible to reliably remove it. In addition, bent pin 3
The cross-sectional shape of FIG. 7 is as shown in FIG.
As in (i), it is preferable that the shape has a concave portion 6k and an edge portion 6z.

Further, in the embodiment of FIG. 3, the cross section perpendicular to the longitudinal direction of the pin 6 has a V shape, but the present invention is not limited to this. Other than this, the cross section of the pin 6 perpendicular to the longitudinal direction can be formed into various shapes as shown in FIGS. (A) is a U-shaped cross section, (b) is a W-shaped cross section, (c) is an M-shaped cross section, and (d) is a crown-shaped cross section. Also, (e)
Is a triangle, (f) is a rhombus, (g) is a square, (h) is an inverted triangle, and (i) is a rectangular cross section. In each figure, 6k is a concave portion opened in the rotation direction R of the drum 3,
Reference numeral 6z is an edge portion for hooking grass formed at the open end of the recess 6k.

Further, in the embodiment of FIG. 3, the tip 6c of the pin 6 has a shape which is sharpened toward one apex as an example of a sharp shape, but the present invention is not limited to this. is not. In addition to this, as shown in FIG. 10 (a), the tip 6c is divided into two, and the pin 6 has a shape that is sharpened toward two vertices, or as shown in FIG. 10 (b). It is also possible to use the pin 6 having the tip portion 6c divided into three and having a shape that is sharpened toward the three vertices. 10, the same parts as those in FIG. 3 are designated by the same reference numerals, and the sectional shape of each pin in FIG. 10 is the same as that in FIG. 3 (b). In this way, the tip 6c of the pin 6 is provided with a plurality of vertices, and the tip 6c is sharpened toward the plurality of vertices so that the grass that has been uprooted can be easily hooked on the tip 6c of the pin 6. It is possible to pull it out from the ground reliably. Further, the shape of such a tip portion 6c is
In addition to the embodiment shown in FIG. 3B, FIG.
It may be applied to the embodiment shown in (i).

Further, in the above embodiment, the grass pressing portion 25
As an example, one having a plurality of comb portions 25a having a comb-shaped tip is given as an example, but the present invention is not limited to this. In addition to this, as shown in FIG. 11A, it is also possible to use a roller-shaped grass pressing portion 40. The grass retainer 40 includes a main body 40a and a roller portion 40b rotatably supported by the main body 40a, and is connected to the body frames 1d and 1e so as to approach the drum 3 at a predetermined distance D2. . By doing so, as shown in FIG. 11B, the roller portion 4
0b to bring down the grass G in front of the drum 3 and press it down,
As shown in FIG. 11C (view from the arrow C in FIG. 11B), the grasses G can be crossed and entangled.
As a result, the grass G can be easily hooked on the pin 6 and can be reliably removed from the ground.

In the above embodiment, the drum 3 is rotatably supported by the support shaft 2 fixed to the body frames 1d and 1e, but the present invention is not limited to this. Alternatively, the drum 3 may be directly fixed to the support shaft 2 and the support shaft 2 itself may be rotated to rotate the drum 3. In this case, the support shaft 2 is connected to the body frames 1d, 1e and the like through members such as bearings, and the sprocket 15 is supported so that the rotation of the sprocket 15 is directly transmitted to the support shaft 2. It is fixed to the shaft 2.

In the above embodiment, the fixed pin 6 fixed to the drum 3 by welding or the like is taken as an example, but the present invention is not limited to this, and the drum 3 is not limited thereto.
It is also possible to use a movable pin in which a pin insertion hole is provided on the peripheral surface of the pin and the pin projects or retracts from the pin insertion hole. In this case, a mechanism for allowing the pin to project or retract from the pin insertion hole is incorporated inside the drum 3.

Further, in the above embodiment, the drive unit 7 is composed of an engine, a motor, etc., and the self-propelled weeding machine 100 in which the drive unit 7 drives the self-propelled weeding machine 100 is taken as an example. The present invention is not limited to this, and can be applied to a hand-operated weeding machine in which an operator holds the grip frame 1a and pushes the weeding machine to travel. In this case, the drum 3 is moved to the traveling wheel 17
As a drive source for rotating in the rotation direction R, which is the opposite direction to the rotation direction W of a and 17b, a drive unit dedicated to the drum 3 including an engine, a motor, etc. may be provided, or a force for pushing the weeding machine by the worker. May be amplified by an amplifying mechanism and transmitted to the drum 3 via a sprocket, a chain or the like.

[0041]

According to the present invention, since the pin is formed with the edge portion, the excavating force of the pin is increased and the grass can be uprooted even on hard ground.
Further, the grass dug up is easily caught on the edge portion, and the grass can be reliably removed from the ground.

[Brief description of drawings]

FIG. 1 is a right side view of a weeding machine according to the present invention.

FIG. 2 is a plan view of a weeding machine according to the present invention.

FIG. 3 is a view showing pins of the weeding machine according to the present invention.

FIG. 4 is a view showing a drum of the weeding machine according to the present invention.

FIG. 5 is a diagram showing a weeding part of the weeding machine according to the present invention.

FIG. 6 is a view showing a grass receiver of the weeding machine according to the present invention.

FIG. 7 is a diagram illustrating a weeding operation of the weeding machine according to the present invention.

FIG. 8 is a view showing another pin of the weeding machine according to the present invention.

FIG. 9 is a view showing another pin of the weeding machine according to the present invention.

FIG. 10 is a view showing another pin of the weeding machine according to the present invention.

FIG. 11 is a view showing another weed retainer of the weeding machine according to the present invention.

FIG. 12 is a schematic structural diagram showing a conventional weed extractor.

FIG. 13 is an internal structural diagram of a conventional weed extractor.

[Explanation of symbols]

1 car body 3 drums 6 pin 6k recess 6z edge part 7 Drive 17a traveling wheel 17b traveling wheel 25 Grass retainer 37 pins 40 Grass retainer 100 weeding machine G grass GL ground

Claims (7)

[Claims] 1. A weeding machine for removing grass grown on the ground while traveling, comprising: a vehicle body, traveling wheels for traveling the vehicle body, a drum rotatably supported by the vehicle body, and a circumference of the drum. A plurality of pins for weeding arranged so as to project from the surface, and a drive unit for rotating the drum in a direction opposite to the rotation direction of the traveling wheels, and for hooking grass on the plurality of pins. A weeding machine having an edge portion formed. 2. The weeding machine according to claim 1, wherein each of the plurality of pins has a shape in which a cross section perpendicular to a longitudinal direction has a recess opened in a rotation direction of the drum, and an opening of the recess. A weeding machine, wherein the edge portion is formed at an end. 3. The weeding machine according to claim 1 or 2, wherein the plurality of pins are formed in a sharp shape toward the tip. 4. The weeding machine according to claim 1, wherein the plurality of pins are arranged so as to project in a staggered manner from the peripheral surface of the drum. A weeding machine. 5. The weeding machine according to any one of claims 1 to 4, wherein the weeding part is provided near the drum and forwardly with respect to the traveling direction of the vehicle body so that the grass is pushed down. Weeding machine characterized by having. 6. The weeding machine according to any one of claims 1 to 5, wherein the plurality of pins are fixed to the drum. 7. A weeding machine for removing grass that has grown on the ground while traveling, comprising: a vehicle body, traveling wheels for traveling the vehicle body, a drum rotatably supported by the vehicle body, and a circumference of the drum. A plurality of pins for weeding that are arranged so as to project from the surface, and a drive unit that rotates the drum in a direction opposite to the rotation direction of the traveling wheels, wherein the plurality of pins are in the rotation direction of the drum. A weeding machine characterized by being bent in the direction of.