JPH04124026U - brush cutter - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a brush cutter that can be moved with little force regardless of depressions or obstacles in the ground. [Structure] A pair of rollers 60 and 61 are rotatably provided on both sides of a gear case 12 provided on the bottom side of a main body 10 of a brush cutter. The roll diameter of the rollers 60 and 61 is
The height is set so that the bottom surface of the gear case 12 does not come into contact with the ground when the brush cutter is moved while sliding on the ground.
The rollers 60 and 61 are driven type rollers that roll due to frictional force with the ground when the brush cutter is moved. [Effect] The rollers 60 and 61 make it easier to get over depressions and obstacles in the ground, and the brush cutter can be run at a constant speed. Further, the cutting blade body 20 does not bite into more weeds than the mowing capacity due to a sudden increase in speed, so mowing work can be continued without stopping the prime mover 11 and the like.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a portable brush cutter used for mowing grass, lawn care, etc. Regarding.

0002

[Conventional technology]

As a portable brush cutter used for mowing grass, etc., push the main body of the device placed on the ground. There are two types of equipment that can be moved by pushing or pulling them, and others where the main unit is hung from the shoulder and the main operating rod is attached. There is a type that cuts weeds, etc. with a blade attached to the tip.

0003 A brush cutter that moves while keeping the main body of the device in contact with the ground is shown in Figure 1. A cutting blade body 20 is installed on one side of the lower part of the equipment body 10. A prime mover 11 is mounted on the device body 10, and the power from the prime mover 11 is transmitted through gears. It is transmitted to the cutting blade body 20 via the case 12. The cutting blade bodies 20 move in opposite directions. It is provided with upper and lower cutting blades 21 and 22 so that it can move backward.

0004 The cutting blades 21 and 22 are intermittently provided with long holes, and the gear case 12 has an auxiliary plate. The screw holes are made to correspond to the screw holes drilled in the guide plate 14 fixed together with the guide plate 13. stop Then, insert the screws 23 into these long holes and screw holes and lock them with the nuts 24. This allows the cutting blades 21 and 22 to reciprocate along the guide plate 14.

[0005] A stay 30 is fixed to the auxiliary plate 13. At the top of the stay 30, there is a chrysanthemum seat 3 The lower ends of the main rods 32 are connected via 1. The main rod 32 further passes through the chrysanthemum seat 33. and is connected to the operating rod 34. This allows the main rod 32 to rotate in the a-b direction. Thus, the operating rod 34 can be rotated in the c-d direction. In addition, the number 35 is the main rod 3. 2 shows the accelerator lever of the prime mover 11 attached to 2.

[0006] When performing work such as mowing, the operator should move the cutting blade 20 over the ground where weeds, etc. have grown. The brush cutter is moved while pulling the operating rod 34 so as to slide. At this time, the mowing In order to move the machine smoothly, in Utility Model Application Publication No. 2-78021, the equipment An installation cover 40 is attached to the lower part of the main body 10. As the installation cover 40, In order to provide a sled action that ensures smooth movement of the device body 10, it is smooth and curved. A curved semi-cylindrical shape is used.

[0007]

[Problem that the idea aims to solve]

When the operator walks while pulling the brush cutter, the installation cover 40 is not yet mowed. Slip while setting up with untaken ground. Then, set some undulations on the ground. The cover 40 is climbed over and the brush cutter is moved.

[0008] However, the shape of the ground where mowing is performed is not uniform, and the way weeds grow, etc. etc. are also different. Therefore, the resistance when pulling the brush cutter varies greatly. As a result, the speed at which the device main body 10 is moved fluctuates and exceeds the mowing capacity of the cutting blade body 20. Sometimes there is a load on top. When an excessive load is applied, the cutting blade body 20 The prime mover 11 stops with weeds and the like biting into the area.

[0009] In addition, during normal mowing work, the main body 10 of the device is pulled while tilted to the ground. I feel tense. Therefore, in places where the ground is greatly depressed or where there are large obstacles, etc. In this case, the edge of the installation cover 40 gets caught, and the smooth movement of the brush cutter is actually hindered. In some cases. At this time, while the cutting blade body 20 is reciprocating, It is necessary to climb over the device body 10. Therefore, the operator Extend your arms and hold the device body 1 so that the body 10 and the cutting blade body 20 do not come close to your body. It will lift 0. This lifting action requires a large amount of force; Repeated operations cause fatigue to workers.

0010 This invention was devised to solve this problem, and it By installing a pair of rotatable rollers in the section, you can easily ride over obstacles and depressions. The purpose is to provide a brush cutter that can run at a constant speed. Ru.

[0011]

[Means to solve the problem]

In order to achieve the purpose of the brush cutter of this invention, the bottom of the equipment body equipped with the prime mover A cutting blade having a gear case provided in the center of the surface and a pair of cutting blades extending from the gear case. body, and the bottom of the equipment body parallel to the longitudinal direction of the cutting blade body with the gear case in between. It is equipped with a pair of rollers provided on both sides of the surface, and when the main body of the device is moved, The roller is characterized in that the roller rolls on the ground.

0012

【Example】

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings. In addition, Parts that correspond to those shown in Figure 1 are designated with the same reference numerals, and their descriptions are appropriate. It has been omitted for convenience.

[0013] The brush cutter of this embodiment is shown in FIG. 1 as a whole and in FIG. 2 as its main parts. 0 is equipped with a cutting blade body 20. A prime mover 11 is mounted on the device body 10. Ru. Power from the prime mover 11 is transmitted to the cutting blade body 20 via the gear case 12. The cutting blade body 20 includes a set of two cutting blades 21, 2 that can reciprocate with each other as in the case of FIG. It consists of 2. Either one of these cutting blades 21, 22 is fixed to a guide plate, It is also possible to adopt a method in which only one cutting blade moves back and forth.

[0014] The ends of the cutting blades 21 and 22 on the device main body 10 side are covered with a frame 15. Friends A tubular support 51 of the operating section 50 is attached to the arm 15 so as to be perpendicular to the longitudinal direction thereof. It is being A handle is provided at both ends of the tubular support 51 via boss portions 52a and 53a. Dollar base rods 52, 53 are mounted orthogonally to the tubular support 51. Boss part 5 2a, 53a are provided with split grooves 52b, 53b, and female threaded portions 52c, 5. Bolts 52d and 53d are screwed into 3c. The tightening force of bolts 52d and 53d is By loosening, the handle base rods 52, 53 are rotated about the tubular support 51. Turn around.

[0015] The handle base rods 52 and 53 have grips 54a and 55a formed at their upper ends. Handle rods 54 and 55 are rotatably fitted into each other. Handle rod 54,5 5 and the handle base rods 52, 53 are connected with lock bolts 56, 57. By loosening the handle base bolts 56 and 57, it protrudes from the handle base rods 52 and 53. By changing the length of the handle tubes 54, 55, the grips 54a, 55a are adjusted to match the height of the

[0016] Note that the present invention has an operating section 5 equipped with a pair of handle tubes 54 and 55 shown in FIG. It is not restricted to 0. For example, a handle base erected on the device body 10 It is also possible to provide a loop-shaped handle rod on the top of the handle. Furthermore, a loop-shaped A part of the handle rod is detachable, allowing the handle to be looped or bifurcated depending on the situation. It can also be used as a rod.

[0017] A pair of rollers 60 are provided on the bottom side of the device body 10 so as to sandwich the gear case 12. 61 are provided. These rollers 60, 61 are connected to the main body of the device as shown in FIG. The rotary support tubes 62 and 63 extending bifurcated from the end of 10 are fitted into rotation support tubes 62 and 63, respectively. . As a result, when moving the brush cutter while sliding on the ground, the rollers 60, 61 rolls on the ground. Note that the roll diameters of the rollers 60 and 61 are the same as the gear case 12 and the ground. The value is set so that a slight gap is formed between the surface and the surface.

[0018] The rolling of the rollers 60 and 61 allows the brush cutter to move smoothly. Also, Since rollers 60 and 61 are provided on both sides of the case 12, the direction of movement must be considered. You can move the brush cutter without having to do anything. For example, there are uncut weeds, etc. When the brush cutter is required to be temporarily moved in the opposite direction to the direction of movement of the brush cutter, However, the directionality is canceled by the rollers 60 and 61 on both sides, and movement in the opposite direction is also circular. Becomes smooth. Furthermore, even if there is a slight depression in the ground, the rollers 60, 6 will not get caught. 1 gets over the pothole. Also, if there is an obstacle on the ground, the roller 6 0.61 will overcome it. Therefore, regardless of the unevenness of the ground or obstacles, it can be applied with a constant force. The brush cutter can be moved.

[0019] In other words, the rollers 60 and 61 allow the brush cutter to be moved with a small amount of force. This reduces worker fatigue. Then pull with constant force Therefore, the running speed of the brush cutter becomes stable. especially over potholes and obstacles in the ground. Because there is no high-speed movement immediately after pulling the brush cutter with a large force, the cutting blade body 20 The applied load does not fluctuate significantly beyond the mowing capacity. As a result, the prime mover The mowing work can be continued without stopping the 11.

[0020] Furthermore, since the rollers 60 and 61 are provided on the bottom side of the device main body 10, The gear case 12 can be lifted off the surface, and obstacles on the ground can be removed from the gear case 1. The number of collisions with the vehicle is also reduced, and the drive system is protected. Moreover, the cutting blade body 20 It also becomes easier to replace the gear case 12 and inspect the gear case 12.

[0021]

[Effect of the idea]

As explained above, in this invention, the gear case is placed on the bottom side of the device body. By installing a pair of rollers that are sandwiched between them, the brush cutter can be moved while sliding on the ground. It requires less force when moving. As a result, fatigue caused to workers is reduced. What's more, since the brush cutter moves smoothly, it can exceed its mowing capacity. Sudden high-speed movement that causes weeds to get caught in the cutting blade body is prevented, resulting in a stable Brush cutting work will continue under these conditions. In this way, when using the present invention, the worker Mowing work is performed without causing fatigue.

[Brief explanation of drawings]

FIG. 1 shows an existing brush cutter with an installation cover exhibiting a sled action.

[Fig. 2] Overall perspective view schematically showing a brush cutter according to an embodiment of the present invention

[Figure 3] Partial perspective view showing the main parts of the brush cutter

[Figure 4] View of the same brush cutter from the bottom side

[Explanation of symbols]

10 Equipment body 11 Prime mover 12
Gear case 21, 22 Cutting blade 20 Cutting blade body 60,
61 Roller

Claims (1)

[Scope of utility model registration request] 1. A gear case provided at the center of the bottom of a device body on which a prime mover is mounted, a cutting blade body extending from the gear case and having a pair of cutting blades, and a cutting blade body extending in the longitudinal direction of the cutting blade body with the gear case in between. A brush cutter comprising a pair of rollers provided in parallel on both sides of the bottom surface of the device main body, and the rollers roll on the ground when the device main body is moved.