JP2011024557A - Bush cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool performing bush cutting work with an appropriate angle depending on various working circumstances and working conditions and reducing fatigue of an operator in a bush cutter. <P>SOLUTION: The bush cutter has an operating rod 4 which is extended toward left and right from a fixture 5, then bent upward to be grip parts by extending by 15° forward from verticality and 30° apart from a frame pipe 3 from verticality, subsequently bent backward to be grip parts by extending 15° downward from almost horizontal level from the frame pipe 3 and apart by 45° from parallel to the frame pipe 3, and finally bent downward to be grip parts by extending 45° backward from the verticality and 15° in the direction of the frame pipe 3 from the verticality to form its shape. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a universal brush cutter such as a shoulder brush cutter or a backpack brush cutter.

In general, a universal brush cutter of the type called a shoulder-type brush cutter that hangs on the shoulder and works, the rotational force of the prime mover is applied to the inside of a bowl-shaped frame pipe that has a prime mover at the front end and a cutting blade device at the rear end. The drive shaft that communicates with the cutting blade device penetrates, and a hanging tool is provided near the center of gravity of the main body of the frame pipe, and a U-shaped handle is provided as a control rod in front of the hanging tool via a fixing tool. The tool is connected, the both ends of the U-shaped handle are held, and the brush cutter is moved by moving the brush cutter to the left and right.

The shoulder-type brush cutter may be provided with a loop handle instead of the U-shaped handle, and has a grip attached to the loop handle and the frame pipe as an operating rod.
In addition, a shoulder-type brush cutter generally referred to as a single rod has a grip attached to two places on the frame pipe and uses the frame pipe as an operating rod.

A universal brush cutter generally referred to as a backpack-type brush cutter has a cutting shaft device at the front end and a flexible shaft included in a flexible tube connected to a prime mover carried on the back of an operator on a frame pipe connected to the flexible tube. It is connected to the included drive shaft and transmits the rotational force of the prime mover to the cutting blade device. In general, a shoulder-type universal brush cutter has a grip attached to a loop handle and a frame pipe, and uses this as an operating rod to move the brush cutter back and forth and to the left and right to perform the brush cutting work.

Conventionally, the above-mentioned universal brush cutter has been widely used in which a metal rotary blade is rotated at a high speed and is applied to grass or the like as an object.
However, because the metal rotary blade rotates at high speed, it may injure the worker and people and living creatures within the working range. When hitting a thick tree or wood product, a phenomenon called kickback may cause the There was a risk of serious injury.

A brush cutter using a metal rotary blade is used when a metal rotary blade hits a hard object such as stone, concrete, metal products, glass, etc. hidden in the grass during work, or near a flower bed, curbstone, guardrail, etc. In the case of work, when the metal rotary blade hits, the blade tip or the cutting blade body may be damaged.
Further, a brush cutter using a metal rotary blade has a cutting blade portion for placing a high-speed rotary body that generates a reaction force and a gyro effect when the metal rotary blade contacts the ground at the tip of the brush cutter. Instability of operation may cause damage such as cutting past plants that should not be damaged by planting flower beds.

  Therefore, recently, as a rotary blade that solves the above-mentioned problems, cutter cords made of various materials such as synthetic resin have been developed, and one or a plurality of cutter cords are attached to a housing rotating body made of metal or plastic. Rotate at high speed to cut grass and other plants.

  In recent years, nylon cord type brush cutters (JP 7-274656 A) and rotary cutters (JP 6-335312 A), which have a function of being automatically pulled out when the above cutter cords are worn and shortened, are introduced and generally spread. is doing.

Japanese Patent No. 3527715 JP 2009-95265 A Japanese Utility Model Publication No. 61-167715 JP-A-9-47128 Japanese Utility Model Publication No. 2-107930 Japanese Patent Laid-Open No. 10-150825 Japanese Utility Model Publication No. 62-107623 Registered Utility Model 3121890 Japanese Utility Model Publication No. 3-92919 JP 2002-78410 A JP 2002-34315 A Japanese Utility Model Publication No. 64-20137 JP-A-9-37

In the brush cutter of Patent Document 1, since the cutting blade portion at the tip located at a position away from the center of gravity of the brush cutter is weighted, it imposes a burden on the operator and affects workability. In addition, offsetting the prime mover and the like to improve workability is introduced in Patent Documents 2 and 3, but offsetting the prime mover and the like may cause a loss in the output of the prime mover and an increase in cost.

  Patent Documents 4 to 6 improve the shape of the operating rod (U-shaped handle) so as to reduce the restriction of the degree of freedom of movement with respect to the movement of the operator in the shoulder-type brush cutter. However, it follows the working method of the conventional shoulder type brush cutter, and it seems that a significant improvement in workability cannot be expected.

  Patent Document 7 introduces an operating instrument to which an arm or an elbow is applied in addition to a grip for gripping a brush cutter. However, since the arm and the elbow are encapsulated, there is a risk of affecting the degree of freedom of work.

  Patent Documents 8 and 9 introduce various shapes of grips of an operating rod of a brush cutter. However, it follows the working method of the conventional shoulder type brush cutter, and it seems that a significant improvement in workability cannot be expected.

  Patent Documents 10 to 13 introduce various shapes of the operation rod. The present invention is unique, not suggested by any shape.

In the conventional universal brush cutter described above, when the cutter cord is used as a cutting blade, there are the following problems.
Because the cutter cord cuts grass to pulverize the grass, etc., when the grass density increases compared to when using a metal rotating blade, it becomes overloaded and the workability is significantly reduced and the operator's fatigue level is increased, and the brush cutter There was also a case where the aircraft such as the clutch was damaged.
In addition, when the rotating body (housing) with the cutter cord attached is operated with a strong inclination with respect to the ground, the wear of the cutter cord proceeds remarkably, and when the side surface of the rotating body (housing) hits the ground, the cutter cord is There was a case where it was cut from the root.

The present invention reduces the operator's fatigue with respect to the amount of work in the universal brush cutter, converts the energy of the motor of the brush cutter into a cutting operation with higher efficiency, and is superior in safety compared to a metal rotary blade. It is an object of the present invention to provide a simple and low-cost instrument that realizes an unnecessary cutting of a cutter cord when using the cutter cord and a mowing operation without significant wear.

In the invention according to claim 1, generally called a shoulder-type brush cutter, a cutting blade device 1 is provided at the front end, and a rotational force of the prime mover 2 is applied to the inside of a frame pipe 3 provided with a prime mover 2 at the rear end. There is an operating shaft 4 that is coupled by the frame pipe 3 and the fixture 5, and a suspension 6 and a shoulder belt 8 that are between the fixture 5 and the prime mover 2 and are attached to the frame pipe 3. And a frame in which a flexible shaft included in a flexible tube connected to a prime mover having a cutting blade device at the front end and connected to a worker is connected to the flexible tube. Connected to a drive shaft contained in a pipe to transmit the rotational force of the prime mover to the cutting blade device, and to a universal brush cutter comprising an operating rod coupled by the frame pipe and a fixture The right and left sides of the operating rod 4 connected to the frame pipe 3 and the fixture 5 in a substantially cross shape as viewed from the prime mover 2 side extend to the left and right, and then bend substantially upward and 15 degrees from the vertical. After extending forward 30 degrees away from the frame pipe 3 in the direction away from the right front grip portion 11R and the left front grip portion 11L, the frame is bent substantially rearward and 15 degrees downward from approximately horizontal to 15 degrees 45 degrees. After extending to the prime mover 2 side in the direction away from the pipe 3, the right horizontal grip portion 12R and the left horizontal grip portion 12L are bent, and then bent downward substantially 15 degrees from the vertical and 45 degrees from the vertical in the direction approaching the pipe frame 3. It has a shape extending to the right rear grip portion 13R and the left rear grip portion 13L.

According to a second aspect of the present invention, in the universal brush cutter according to the first aspect, the right and left sides of the operating rod 14 are joined in a substantially cross shape by the frame pipe 3 and the fixture 5 when viewed from the prime mover 2 side. After extending to the left and right, it bends upward, 15 degrees forward from the vertical, 30 degrees from the vertical, and upwards in the direction away from the frame pipe 3 to form the right front grip part 11R and the left front grip part 11L, and then bend backwards Then, the first horizontal grip portion 12R and the left horizontal grip portion 12L extend downward toward the prime mover 2 in a direction 15 degrees to 45 degrees downward from approximately horizontal and away from the frame pipe 3, and then bent downward. After extending 15 degrees from the vertical in the direction approaching the pipe frame 3 from the vertical to 45 degrees to form the right rear grip part 13R and the left rear grip part 13L, it is bent forward and 15 from the horizontal. And having a shape with the lower right horizontal grips 14R and lower left horizontal grip portion 14L extends forward direction approaching 15 degrees upward direction 45 Do該 frame pipe 3.

In the prior art, when the direction of the rotary body of the cutting blade device 1 is a left rotation when viewed from above, the operator hangs the brush cutter on the right side of the body and performs the work. This is probably because the operator's dominant arm is often the right hand.

However, in claims 1 and 2 of the present invention, it is recommended to work with the frame pipe 3 positioned on the left side of the operator's body.
The reason for this is that a universal brush cutter having a cutting blade device 1 that rotates at a high speed at the tip of a long object has a reaction force (cutting blade device 1) received from an object to be cut by the action of a cutter cord 9 that rotates at high speed. The reaction vector, which is the position and direction of the reaction of the grass and the like against the action of the rotating cutter cord 9, greatly affects the performance of the brush cutter.

In the conventional brush cutter, when the direction of rotation of the cutting blade device 1 is counterclockwise when viewed from above, and the operator hangs the brush cutter on the right side of the body and performs an operation, the operator holds the cutting blade device 1. Swing from right to left, so the position of the rotating cutter cord 9 that strikes the object to be cut is expressed on the dial of the clock and the tip is 12 o'clock, from 9:30 to 11:30 The reaction vector is substantially in the upper right direction from the vicinity of the left end of the cutter cord 9 on which the brush cutter rotates.
However, when the direction of rotation of the cutting blade device 1 is counterclockwise when viewed from above and the operator hangs the brush cutter on the left side of the body as in the present invention, the operator moves the cutting blade device 1 to the right. The position of the high-speed rotating cutter cord 9 that strikes the object to be trimmed is therefore expressed on the dial of the clock and the tip is 12 o'clock, from 7:30 to 9:30 The reaction vector is substantially forward from the substantially lower left position of the cutter cord 9 rotating by the brush cutter.

From the above, when the conventional brush cutter receives a reaction vector that is substantially in the upper right direction from the position near the left tip of the cutter cord 9 that rotates at high speed of the brush cutter, the cutting blade device 1 is at the tip of the long object. Therefore, the frame pipe 3 receives a substantially lateral force from the left to the right at the tip. For this reason, it is difficult for the operator to stably operate the tip, and vibration is generated in the frame pipe 3, which causes energy loss in the output of the prime mover 2, and the output of the prime mover 2 is sufficiently transmitted to the brushing work. Absent.
On the other hand, in the brush cutter of the present invention, the reaction vector is substantially forward from the substantially lower left position of the cutter cord 9 rotating by the brush cutter. The frame pipe 3 can be stably operated, and the vibration of the frame pipe 3 is weak. Therefore, the energy loss of the output of the prime mover 2 is less than that of a conventional brush cutter.

As described above, in the brush cutter of the present invention, the position of the rotating cutter cord 9 that strikes the object to be trimmed is expressed on the dial of the clock. If the tip is 12 o'clock, it is 7:30 to 9:30. If the cutter cord 9 or the housing rotating body 8 that rotates at a high speed is rubbing against the ground or grass at this position and the direction of discharging the cut grass is from 4 o'clock to 6 o'clock, the tip of the brush cutter A driving force is generated from right to left as viewed from the prime mover 2 side. By using this driving force, the operator can reduce the burden of muscular strength for working by swinging the cutting blade device 1 from right to left.
On the other hand, in the prior art brush cutter, the position of the rotating cutter cord 9 that strikes the object to be trimmed is expressed on the dial of the watch. If the tip is 12 o'clock, the position is 9:30 to 11:30 When the cutter cord 9 or the housing rotating body 8 rotating at high speed rubs against the ground or grass at this position, a driving force is generated from the left to the right as viewed from the prime mover 2 at the tip of the brush cutter. The driving force hinders the brushing work in which the operator swings the cutting blade device 1 from right to left.

When the housing rotating body 8 to which the cutter cord 9 is attached is tilted with respect to the ground, the wear for the cutter cord 9 hitting the ground is remarkably advanced, and the side surface of the housing rotating body 8 is a stone on the ground. The cutter cord 9 may be cut from the base when it hits, but by operating the housing rotating body 8 and the cutter cord 9 that rotate at a high speed so as to be maintained at an angle that is always substantially parallel to the ground and slightly inclined. Wear and cutting of the cutter cord 9 can be avoided.

In order to sufficiently exhibit the effects described in [0022], [0023] and [0024], the housing rotating body 8 and the cutter cord 9 that rotate at high speed are always substantially parallel to the ground and slightly inclined at a slightly inclined angle. It is essential to operate the cutting blade device 1 stably so as to keep it overlooked.

However, in the conventional brush cutter, the cutting blade device 1 is rotated counterclockwise when viewed from above, and the operator also hangs the brush cutter on the left side of the body to perform the cutting object. The cutting blade device 1 is stabilized as described above by the reaction force that varies depending on the size and density of the blade, the reaction force that the cutting blade device receives when it strikes the ground, and the gyro effect generated by the cutting blade device that rotates at high speed. Operation was impossible.
In the following, a new function that does not exist in the prior art of the present invention that makes it possible to stably operate the cutting blade device 1 to sufficiently exhibit the above-described effects will be described below.

In the invention according to claim 1, the both sides of the intersection of the operating rod 4 with the frame pipe 3 are bent and extended upward, the right front grip portion 11 </ b> R and the left front grip portion 11 </ b> L, and bend substantially horizontally to the prime mover 2 side. 6 parts of the right horizontal grip part 12R and the left horizontal grip part 12L, then the bent part extending downward, the right rear grip part 13R and the left rear grip part 13L, and their boundary parts. It can be used as a grip position in the operation rod 4.

In the invention according to claim 2, in addition to the six parts of claim 1 described above, a total of eight parts of the lower right horizontal grip part 14R and the lower left horizontal grip part 14L and their boundary parts are It can be used as a grip position.

The operator 21 grasps the right front grip portion 11R and the left front grip portion 11L, and thus can perform an operation similar to a conventional universal brush cutter. The grips of the right rear grip portion 13R and the left rear grip portion 13L can be armed from the outside or the inside. The cutting blade device 1 can be stably operated when the reaction force from the object to be cut away (the reaction of grass or the like against the action of the cutter cord 9 rotating by the cutting blade device 1) is strong.

Since the worker 21 holds the right horizontal portion grip 12R and the left horizontal grip portion 12L, the worker 21 can hold his / her hand or arm from above, so that the weight of the worker 21 can be carried. Therefore, the cutting blade device 1 is also effective when the brush cutter is slashed horizontally on a horizontal ground, and when the density of the object to be mowed is high and the reaction force is strong from the bottom to the top. There is an effect that can be operated stably.

Since the worker 21 grasps the right rear grip portion 13R and the left rear grip portion 13L, the reach of the cutting blade device 1 extends and the brush cutter can be used for a long time, so the foot condition is poor and the scaffolding is limited. This is effective when the brush cutter needs to be used for a long time.

In the mowing work on a slope such as a slope, the worker 21 works against the gravity applied to the valley side, and the state of the foot is unstable. The operator 21 has an upper part of the right front grip part 11R with the right hand and an upper part of the left rear grip part 13L with the left hand, so that the posture is close to the mountain side and a stable operation is possible.
In addition, there is an effect that the operator 21 can operate the cutting blade device 1 more stably by grasping the right front grip portion 21R and applying the arm to the right rear grip portion 23R from the outside or the inside.

In the mowing work on the slope of the foot slope, etc., standing on the bank, the operator 21 holds the right front grip portion 11R with the right hand and the lower left grip portion 14L or the lower left horizontal grip portion 14L with the left hand. Thus, the brush cutter can be set up in a substantially vertical direction, and the effect can be exhibited in the brush cutting work from the feet of the operator 21 to the lower slope.

When the worker 21 grasps the lower right horizontal grip portion 14R and the lower left horizontal grip portion 14L, there is an effect in the mowing work of the ground or the like that is higher than the standing position of the worker 21, and the worker 21 A cutting blade device by gripping the lower right horizontal grip portion 14R and the lower left horizontal grip portion 14L, and applying the arm to the right horizontal grip 12R and the left horizontal grip 12L or the right rear grip portion 13R and the left rear grip portion 13L from the outside or from the inside. One more stable operation can be obtained.

As described above, according to the present invention, there are effective combinations of grips depending on the situation of various mowing work. However, if the worker 21 continues the mowing work with the same gripping method, the same muscles are used. And tension and fatigue in the joints.
Therefore, in the present invention, when an operator feels strain or fatigue of muscles or joints, the grip position is moved from the previous grip position to a suitable grip position in the vicinity for a while, or an optimum grip combination is used. It is possible to change the grip by a combination of the next grip.
As a result, the operator 21 uses different muscle and joint positions, and can rest the previously used muscles during this period, thereby relieving tension and fatigue. Then, when the previous muscle has recovered to some extent, it can be returned to the original grip combination.
By repeating the above, the mowing work can be continued while rotating the gripping position to avoid the accumulation of muscle and joint tension and fatigue of the worker 21 at the same site.

From the above, the present invention realizes the conversion of the energy of the motor of the brush cutter into the cutting operation with higher efficiency, and realizes the cutting operation without unnecessary cutting of the cutter cord and significant wear. The operator can reduce the fatigue of the operator with respect to the amount of work and can improve the work efficiency by about 50 to 150% compared to the conventional universal brush cutter.

The perspective view which shows the 1st Embodiment of this invention The perspective view which shows the 2nd Embodiment of this invention. The top view which shows the 1st Embodiment of this invention The top view which shows the 2nd Embodiment of this invention The side view which shows the 1st Embodiment of this invention Side view showing a second embodiment of the present invention The partial cross section front view which shows the 1st Embodiment of this invention The partial cross section front view which shows the 2nd Embodiment of this invention Work explanatory diagram of usage situation similar to a conventional brush cutter Work explanatory diagram of the usage situation in work on flat ground Work explanatory diagram of the usage situation that can use the brush cutter for a long time Work explanatory diagram of the usage situation in the work on the slope Work explanatory diagram of the usage situation in the work below from the worker's feet

Hereinafter, embodiments of the present invention will be described with reference to FIGS.

As shown in FIG. 1, there is a drive shaft that transmits the rotational force of the prime mover to the cutting blade device 1 inside the frame pipe 3 having the cutting blade device 1 at the front end and the prime mover 2 at the rear end, and is fixed to the frame pipe 3. There is an operating rod 4 connected by a tool 5, which consists of a hanging tool 6 which is between the fixing tool 5 and the prime mover 2 and is attached to the frame pipe 3.

As shown in FIG. 2, the difference between the second embodiment and the first embodiment of the present invention is the shape of the operation rods 4 and 14, and the operation rod 14 of the second embodiment of the present invention is A lower right horizontal grip portion 14R and a lower left horizontal grip portion 14L are added to the operation rod 4 of the first embodiment of the present invention.

As an example, the length of the right horizontal grip 12R and the left horizontal grip 12L shown in FIG. 3 is about 200 to 400 mm, and the length of the right rear grip portion 13R and the left rear grip portion 13L is about 150 to 400 mm or more. Can be mentioned. The d angle is 15 to 45 degrees, and the e angle is 0 to 15 degrees.

4, the length of the right horizontal grip 12R and the left horizontal grip 12L is about 200 to 400 mm, the length of the right rear grip portion 13R and the left rear grip portion 13L is about 150 to 400 mm, the lower right horizontal grip 14R and the lower left portion. As an example, the length of the horizontal grip 14L may be about 200 to 400 mm or more. The d angle is 15 to 45 degrees, the e angle is 0 to 15 degrees, and the g angle is 15 to 45 degrees.

The length of the front right grip portion 11R shown in FIG. 5 is about 100 to 200 mm, the length of the right horizontal grip portion 12R is about 200 to 400 mm, and the length of the right rear grip portion 13R is about 150 to 400 mm or more. As an example. The a angle is 0 to 15 degrees, the c angle is 0 to 15 degrees, and the f angle is 0 to 45 degrees.

The length of the right front grip portion 11R shown in FIG. 6 is about 100 to 200 mm, the length of the right horizontal grip portion 12R is about 200 to 400 mm, the length of the right rear grip portion 13R is about 150 to 400 mm, and the lower right horizontal grip. The length of the portion 14R may be a dimension of about 200 to 400 mm or more as an example. The a angle is 0 to 15 degrees, the c angle is 0 to 15 degrees, the f angle is 0 to 45 degrees, and the h angle is 0 to 15 degrees.

The width L1 of the portion orthogonal to the frame pipe 3 by the fixture 5 of the operation rod 4 shown in FIG. 7 is about 250 to 450 mm, and the length of the right horizontal grip portion 12R and the left horizontal portion grip 12L is about 200 to 200 mm. As an example, the distance L2 between the left and right ends of the operating rod 4 is about 450 to 600 mm. As an example, the length of the right front grip portion 11R and the left front grip portion 11L is about 100 to 200 mm, and the length of the right rear grip portion 13R and the left rear grip portion 13L is about 150 to 400 mm or more. The b angle is 0 to 30 degrees, and the e angle is 0 to 15 degrees.

The width L1 of the portion orthogonal to the frame pipe 3 by the fixing tool 5 of the operating rod 14 shown in FIG. 8 is about 250 to 450 mm, and the length of the right horizontal grip portion 12R and the left horizontal portion grip 12L is about 200 to 200 mm. As an example, the distance L2 between the left and right ends of the operation rod 14 is about 450 to 600 mm. The length of the right front grip portion 11R and the left front grip portion 11L is about 100 to 200 mm, the length of the right rear grip portion 13R and the left rear grip portion 13L is about 150 to 400 mm, and the length of the lower right horizontal grip 14R and the lower left horizontal grip 14L. As an example, a dimension of 200 to 400 mm or more can be cited as an example. The b angle is 0 to 30 degrees, and the e angle is 0 to 15 degrees.

As shown in FIG. 9, the worker 31 grasps the right front grip portion 11R and the left front grip portion 11L, so that an operation similar to a conventional shoulder brush cutter can be performed.

As shown in FIG. 10, the operator 21 is suitable for the mowing work on a flat ground in which the brush cutter is shaken horizontally from side to side by gripping the right horizontal grip portion 12R and the left horizontal grip portion 12L.

As shown in FIG. 11, the operator 21 grips the right rear grip portion 13R and the left rear grip portion 13L, so that the reach of the cutting blade device 1 extends and the brush cutter can be used for a long time. It is suitable for work where the brush cutter needs to be used for as long as possible when the foot condition is poor or there is no more scaffolding.

As shown in FIG. 12, the operator 21 is suitable for work on a slope by having the upper part of the left rear grip part 13L with the right front grip part 11R and the left hand with the right hand. Further, the operator 21 can operate the cutting blade device 1 more stably by applying the arm to the right rear grip portion 13R from the inside or the outside.

As shown in FIG. 13, the operator 21 can hold the brush cutter in a substantially vertical direction by grasping the lower part of the left rear grip portion 13L with the right hand grip portion 11R and the left hand with the right hand. Suitable for mowing on slopes.

The control rods 4 and 14 are made of a light metal such as an aluminum alloy, a titanium alloy, or a magnesium alloy. The front right grip portion 11R, the left front grip portion 11L, the right horizontal grip portion 12R, the left horizontal grip portion 12L, the right rear grip portion 13R, the left The rear grip portion 13L, the lower right horizontal grip portion 14R, the lower left horizontal grip 14L, and the boundary between the grip portions can be covered with an elastic material having anti-slip and vibration absorbing functions.

The operation rod 14 can be joined at the ends of the lower right horizontal grip portion 14R and the lower left horizontal grip portion 14L to the front portions of the operation rod 14 such as the right front grip portion 11R and the left front grip portion 11L by a method such as welding. .

The operating rods 4 and 14 can deviate the right and left positions when they are coupled at the frame pipe 3 and the fixture 5 to the right or left side, and the counterclockwise direction of the rotating body of the cutting blade portion 1 is rotated to the left. In this case, the right side of the operating rod 4 of the portion that is joined in a substantially cross shape by the frame pipe 3 and the fixture 5 as viewed from the motor side extends longer than the left side, and is 30 degrees away from the frame pipe 3 from the vertical. After bending to the right front grip 11R and bending upward and extending 15 degrees downward from approximately horizontal to 15 to 45 degrees away from the frame pipe 3, the right horizontal grip 12R is formed. Is bent at a rear position from a virtual line perpendicular to the center of gravity as viewed from the top, and is oriented 15 degrees from the vertical to the pipe frame 3 and extends downward 45 degrees from the vertical to the right rear grip 13R. A prime mover in the direction of bending away from the frame pipe 3 and extending upward to form the left front grip 11L, and then bent and directed downward by 15 degrees from substantially horizontal to the frame pipe 3 from parallel to the frame pipe 3 The left horizontal grip 12L is extended to the side, bent at a rear position from the imaginary line, oriented 15 degrees from the vertical to the pipe frame 3 and oriented 15 degrees from the vertical to the pipe frame 3 and extended downward 45 degrees from the vertical and rear left. It is also possible to have the shape of the grip 13L.

DESCRIPTION OF SYMBOLS 1 Cutting blade part 2 Motor | power_engine 3 Frame pipe 4, 14 Operation rod 5 Fixing tool 6 Hanging tool 7 Shoulder band 8 Housing rotating body 9 Cutter cord 11R Right front grip part 11L Left front grip part 12R Right horizontal grip part 12L Left horizontal grip part 13R Right Rear grip part 13L Left rear grip part 14R Lower right horizontal grip part 14L Lower left horizontal grip part 21 Workers a to h Bending angle of operation rods 4 and 14

Claims (2)

Generally referred to as a shoulder type brush cutter, the rotational force of the prime mover (2) is applied to the inside of a frame pipe (3) having a cutting blade device (1) at the front end and a prime mover (2) at the rear end. 1) there is a drive shaft for transmission, and an operating rod (4) coupled by the frame pipe (3) and the fixture (5), and between the fixture (5) and the prime mover (2). A universal brush cutter composed of a hanging tool (6) and a shoulder belt (8) attached to the pipe (3), and generally called a backpack type brush cutter, which is connected to a prime mover equipped with a cutting blade device at the front end and carried by an operator. A flexible shaft included in the flexible tube is connected to a drive shaft included in a frame pipe connected to the flexible tube, and the rotational force of the prime mover is transmitted to the cutting blade device. Combined by fixture In the universal brush cutter comprising the operating rod, the right side of the operating rod (4) coupled to the frame pipe (3) and the fixture (5) in a substantially cross shape as viewed from the prime mover side (2) and The left side extends to the left and right, then bends upward, 15 degrees forward from the vertical, 30 degrees from the vertical, and away from the frame pipe to the right front grip part (11R) and the left front grip part (11L), then rearward The right horizontal grip portion (12R) and the left horizontal grip portion (12L) extend toward the prime mover (2) in a direction that is bent 15 degrees downward from approximately horizontal and 15 degrees to 45 degrees away from the frame pipe (3). ) And then bent downward 15 degrees from the vertical and extending backward 45 degrees from the vertical in a direction approaching the pipe frame (3) to form the right rear grip part (13R) and the left rear grip part (13L). form Brush cutter and having a. The right and left sides of the operating rod (14) coupled to the frame pipe (3) and the fixture (5) in a substantially cross shape as viewed from the prime mover (2) side according to the universal brush cutter according to claim 1. After extending to the left and right, it bends upward and extends 15 degrees forward from the vertical and 30 degrees from the vertical, and extends upward in the direction away from the frame pipe (3). The right front grip part (11R) and the left front grip part (11L) After that, the right horizontal grip portion (12R) and the left are extended to the prime mover (2) side in a direction that is bent backward 15 degrees downward from approximately horizontal and 15 degrees to 45 degrees away from the frame pipe (3). After the horizontal grip portion (12L) is formed, the right rear grip portion (13R) and the left rear grip portion are bent downward and extend rearward from the vertical in a direction approaching the pipe frame (3) by 45 degrees to the rear. (13L After that, the lower right horizontal grip portion (14R) and the lower left horizontal grip portion (14L) are bent forward and extend forward in the direction approaching the frame pipe (3) by 15 degrees upward and 15 degrees upward from the horizontal. A brush cutter characterized by having a shape as follows.

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