JPH01300820A - Starter device and battery device in bush clearer - Google Patents

Abstract

PURPOSE:To improve controllability of bush clearer and reduce sense of fatigue, by installing battery device of motor for starting on a point of holding pipe at the side of cutting blade from handle. CONSTITUTION:A battery device 28 of a motor for starting 18 is formed as annular and installed on a point of holding pipe 12 at the side of cutting blade 22 from a handle 24 and the position of the battery device 28 is made to be freely controlled. Rotating moments of power part side and cutting blade side to sustaining part of the holding pipe by band for shoulder-hanging, etc., are balanced by the controlling of position.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a starter device and a battery device for a brush cutter used for mowing grass, etc., and more specifically, to a starter device and a battery device for a brush cutter used for cutting grass. The present invention relates to a starter device and a battery device to which a starter device and a battery device are attached.

[Conventional technology]

In the brush cutter, the power section is attached to the upper end of the support pipe. Starting an engine using a motor is
It is convenient because it can be started easily even by women, elderly people, etc. who are weak. However, when a brush cutter is equipped with a starter device, a battery device is required to supply electric power to the motor.

In conventional brush cutters with a starter device, the battery device is
(a) It can be placed at the bottom of the power unit, (b) it can be attached to a stand to stand the brushcutter up when it is lowered to the ground, or (C) it cannot be attached to the brushcutter itself.
They are often stored or worn on workers' pockets or waistbands.

Generally, a starter device weighs 1 to 1.5 kg, and a brush cutter equipped with a starter device weighs 20% more than a brush cutter not equipped with a starter device. Further, the weight of the battery device alone is generally 0.5 to 0.6 kg.

[Problem that the invention seeks to solve]

In case (a), the center of gravity of the brush cutter is at the rear.

As the fatigue of the operator increases, the load applied to the joint between the support pipe and the power section increases, and it is necessary to increase the strength of the joint. In addition, when the brush cutter is lowered to the ground, the battery unit is likely to get wet or receive a large shock.Furthermore, when fuel is added to the fuel tank of the power unit, spilled fuel may adhere to the battery unit. There is a risk of fire.

In case (b), the center of gravity of the brush cutter moves slightly forward compared to case (a), but the center of gravity is still biased toward the rear.

Further, when the brush cutter is lowered to the ground, a large impact is applied to the battery device as in the case (a).

Furthermore, when the brush cutter is lowered onto soft ground, there is a risk that the stand will sink into the ground and the battery device may get wet.

In the case of (c), it is necessary to connect each battery device to the starting motor at the time of starting, which makes the starting work troublesome.

In addition, in the brush cutter disclosed in Japanese Patent Publication No. 49-13249, the cutting blade is driven not by an engine but by a drive motor, and a battery device as a power source for the drive motor surrounds the outside of the support pipe in an annular manner. It is attached to the support pipe at the end opposite the drive motor. However, when the cutting blade is driven by the engine, it is not specifically shown where the battery device of the engine starter device is placed. Furthermore, the battery device is fixed in position in the longitudinal direction of the support pipe, making it difficult to expand and wind it.

This invention avoids an increase in the weight of the power section, and
It is an object of the present invention to provide a starter device and a battery device for a brush cutter that can eliminate the trouble of connecting a battery device and a starting motor and carrying the battery device.

[Means for solving problems]

The invention will be described using reference numerals in the drawings that correspond to the embodiments.

In claim 1, the brush cutter (10) includes a power section (14).
) is equipped with an engine (16) and a starting motor (18) that forcibly rotates the engine (16) at the time of starting, and is attached to one end of the support pipe (12), and the cutting blade (22) is supported. A handle (24) is attached to the middle part of the support pipe (12). The starter device for such a brush cutter (10) includes a battery device that supplies electric power to the starting motor (18)! (28) is attached to a portion of the support pipe (12) on the side of the cutting blade (22) with respect to the handle (24) so as to annularly surround the outside of the support pipe (12) in the radial direction.

In claim 2, the brush cutter (10) includes a power section (14).
) is equipped with an engine (16) and a starting motor (18) that forcibly rotates the engine (16) at the time of starting, and is attached to one end of the support pipe (12), and the cutting blade (22) is supported. A handle (24) is attached to the middle part of the support pipe (12). In such a starter device for the brush cutter (10), the battery device (28) that supplies power to the starting motor (18) has flexibility so that it can be wound and expanded, and is connected to the support pipe (12). ) is attached to the support pipe (12) on the side of the cutting blade (22) with respect to the handle (24) so as to annularly surround the outside in the radial direction of the handle (24).

In the invention of claim 3, the battery device (28) is further configured to be able to freely adjust the position of the support pipe (12) in the longitudinal direction.

A battery device (28) according to a fourth aspect of the present invention includes a plurality of dry battery-shaped batteries (34) arranged in a row so that their axial directions are parallel to each other, and a plurality of flexible dry battery-shaped batteries. (34), and a connector (38, 40) that connects both ends of the connector (36) in a separable manner.

In claim 5, the coupling body (36) further includes a case body (
60), a storage space (62) formed in the case body (60) and open at one end to store the dry battery type battery (34), and a case body (60) so as to close the opening of the storage space (62). ) can be covered! (64).

According to claim 6, the combination (36) further comprises an injection molded part (76) in which a plurality of dry cell-shaped batteries (34) are embedded.

[Effect]

In the invention of claims 1 and 2, the battery device (28) is placed sufficiently in front of the area where the worker (50) carries the weight of the brush cutter (10) via the shoulder strap (48) or the like. , and the rotational moments on the front and rear sides relative to the carrying part are balanced.

In the invention of claim 2, the battery device (28) is further detachably attached to any position in the longitudinal direction of the support pipe (12) by unfolding and winding.

In the invention of claim 3, the battery device (28) is further attached to the support pipe (12) with its position adjusted in the longitudinal direction of the support pipe (12). As a result, worker 5
The motive power section (1
4) side and the cutting blade (22) side change.

In the battery device (28) of claim 4, the combination body (36)
The battery itself is bendable in a direction perpendicular to the direction in which the combined body (36) extends, and the plurality of dry battery-shaped batteries (34) are also freely displaceable in the direction in which the combined body (36) extends. As a result, a row of dry cell-shaped batteries (34) and a combination (36)
bends according to the maximum force of winding and unfolding of the dry battery-shaped battery (34).

In the battery device (28) of claim 5, the case body (60
By storing the dry cell type battery (34) in the storage space (62) of ), the dry cell type battery (34) is held by the combination body (36).

In the battery device (28) according to claim 6, the dry battery-shaped battery (34) is embedded and injection molded in the injection molded product (76), and the injection molded product (76) is embedded in the dry battery-shaped battery (34).
4) Retain.

〔Example〕

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view of the entire brush cutter 10. As shown in FIG. Brush cutter 10
has a support pipe 12 that extends linearly, and the power section 14 includes an engine 16 and a starting motor 18 that is disposed below the power section 14 and forcibly rotates the engine 16 when starting the engine 16. is connected to one end of the support pipe 12. The gear box 20 is connected to the other end of the support pipe 12, and the cutting blade 22 is disposed below the gear box 20 and connects the power unit 14 to the transmission shaft 46 (FIG. 3) in the support pipe 12 and the gear. The box 20 is rotated by power transmitted through gears (not shown). The handle 24 is fixed to the support pipe 12 such that its longitudinal position can be freely adjusted at a position near the power unit 14 in the longitudinal direction of the support pipe 12, and extends left and right, and grips 25 are attached to both ends.

A throttle lever 26 and a start switch 2 are located on the handle 24 near the right and left grips 25, respectively.
7 is installed, and the throttle lever 26 is connected to the engine 16.
, and the start switch 27 is turned on when starting the engine 16. The battery device 28 is formed in an annular shape and is attached to a portion of the support pipe 12 in a range closer to the cutting blade 22 than the handle 24, and the position of the battery device 28 in the longitudinal direction of the support pipe 12 is adjustable. . The battery device 28 is connected to the starting motor 18 and the starting switch 27 via a cord 30, and when the starting switch 27 is ON, the starting motor 1
8 is supplied with electric power from the battery device 28 and forcibly rotates the engine 16.

FIG. 2 is a perspective view of the battery device 28 when it is unfolded. The dry battery-shaped secondary battery 34 has the same shape as a dry battery, is composed of a secondary battery such as a nickel-cadmium battery, and can be repeatedly charged via a power line. It is also possible to use a non-rechargeable dry cell instead of the dry cell-shaped secondary battery 34. The plurality of dry battery-shaped secondary batteries 34 are arranged so that their axial directions are parallel to each other.
They are arranged in rows and connected to each other so as to have a voltage that can drive the starting motor 18 as a whole. Combined body 36
has a predetermined flexibility in the thickness direction, and connects and holds the plurality of dry battery-shaped secondary batteries 34 so that they do not fall off or separate from each other. The hook-shaped metal fitting 38 and the loop-shaped metal fitting 40 are respectively attached to both ends of the joint body 36 in the extending direction, and the hook-shaped metal fitting 38 is attached to the loop-shaped metal fitting 4.
By being inserted into and removed from the 0, the two are coupled and separated from each other. The cord 30 has connectors 42 and 44 at both ends, respectively, and can be connected to the battery device 28 and the starting motor 18.

FIG. 3 is a detailed perspective view of the support pipe 12 to which the battery device 28 is attached. The transmission shaft 46 extends within the support pipe 12 coaxially with respect to the support pipe 12 and transmits the power of the engine 16 to the gears of the gear box 20 . Since the plurality of dry cell-shaped secondary batteries 34 are arranged with their axial directions aligned parallel to each other, they are aligned with each other in the direction perpendicular to the extending direction of the combined body 36, that is, in the thickness direction of the combined body 36. Relative displacement is possible. Therefore, the battery device 28 can be freely rolled and expanded, and when the battery device 28 is attached to the support pipe 12, the battery device 28 is wound around the outer circumference of the support pipe 12, so that the battery device 28 surrounds the support pipe 12 in an annular shape. After doing so, the hook-shaped metal fitting 38 and the loop-shaped metal fitting 40 are locked, thereby fixing the battery device 28 to the support pipe 12. That is, by locking the hook-shaped fitting 38 and the loop-shaped fitting 40, the annular joint 36 is connected to the support pipe 1.
z is tightened, a predetermined frictional force is generated between the outer periphery of the support pipe 12 and the inner periphery of the coupling body 36, and this frictional force prevents the battery device 28 from moving in the longitudinal direction of the support pipe 12. Support pipe 1 around which battery device 28 is wound
By changing part 2.

The battery device 28 can be attached to any part of the support pipe 12 in the range closer to the cutting blade 22 than the handle 24.

4 and 5 show working conditions in which the brush cutter 10 is used. The shoulder strap 48 is attached to a portion of the support pipe 12 in the range between the power unit 14 and the handle 24.
8 and supports the weight of the brush cutter 10. Brush cutter 1
When mowing the grass 54 on the flat ground 52 with the mower 0 (FIG. 4), the shoulder strap 48 on the support pipe 12 is attached, and the cutting blade 22 is placed at a lower position than the power section 14.
A brush cutter 10 is used. Therefore, the support pipe 12
The position of the battery device 28 is relatively toward the cutting blade 22, and the mounting of the shoulder strap 48 on the support pipe 12 increases the rotational moment on the cutting blade 22 side with respect to the point, and the working sound 50 causes the cutting blade 22 to Make it easy to hold in a low position. In contrast, the grass 5 on the slope 56 is cut by the brush cutter 10.
4 (FIG. 5), the shoulder strap 48 is attached to the support pipe 12, and the brush cutter 10 is used with the cutting blade 22 positioned higher than the power section 14.

Therefore, the battery device 28 in the support pipe 12
The position is relatively toward the handle 24, and the attachment of the shoulder strap 48 on the support pipe 12 reduces the rotational moment on the cutting blade 22 side relative to the point, allowing the operator 50 to hold the cutting blade 22 at a high position. Make it easy.

6 and 7 are a plan view and a perspective view showing in detail the arrangement and connection state of a plurality of dry battery-shaped secondary batteries 34 in the battery device 28. FIG. The plurality of dry battery-shaped secondary batteries 34 are arranged in rows so that their axes are parallel to each other and adjacent ones have their ends facing oppositely to each other, forming a battery row 57. It consists of They are connected in series with each other so that the voltage as a whole reaches a voltage that can drive the starting motor 18. Both end terminals of the battery row 57 are connected to a cord 58, and the cord 58 is connected to the cord 30 (FIG. 2) via the connector 42.

FIGS. 8 and 9 are an exploded view and a completed assembly view of the battery device 28 including the first example of the combination body 36. FIG.

The case body 60 is made of a soft material such as rubber and has flexibility, and the storage space 62 has one end opened at the end surface of the case body 60 so as to receive the battery array 57, and is arranged inside the case body 60. is formed. The lid 64 is made of the same material as the case body 60, and is fitted and attached to the end surface of the case body 60 on the opening side of the storage space 62. Code 58 passes through M64,
Connector 66 is attached to the end of cord 58.

10(a) to C), FIG. 11, and FIG. 12 are manufacturing process diagrams of the battery device 28 equipped with the second example of the combined body 36, and the tightening is a perspective view of the band 78 and the assembly is a completed view. It is. In FIG. 10, an upper mold 68 and a lower mold 70 can be joined to each other from above and below, and the pouring lower 2 is provided on the upper center surface of the upper mold 68. The battery array 57 is housed in a space inside the upper mold 68 and the lower mold 70, and the cord 58 is drawn out of the upper mold 68 and the lower mold 70. The injector 74 injects the molten soft resin into the upper mold 68 and the lower mold 70 via the pouring lower 2 . After the soft resin in the upper mold 68 and the lower mold 70 has solidified, the upper mold 68 and the lower mold 70 are separated and the injection molded product 76 is taken out.

The battery array 57 is embedded in the injection molded product 76, and the cord 58 extends from the injection molded product 76.

In FIG. 11, a tightening band 78 is formed into an annular shape, and a hook-shaped metal fitting 38 and a loop-shaped metal fitting 40 are attached to both ends. In FIG. 12, a tightening band 78 is attached to the periphery of the injection molded product 76.

The injection molded product 76 is tightened to integrally join the injection molded product 76. The injection molded product 76 and the tightening band 78 are
constitutes a combined body 36 and has a certain flexibility, and as a result,
The combined body 36 can be rolled and unfolded.

〔Effect of the invention〕

In the inventions of claims 1 and 2, since the starting motor for starting is attached to the support pipe on the mower blade side from the handle, the shoulder strap is attached to the power part side and the mower blade side with respect to the support pipe supported by the utility band or the like. The rotation moment is balanced, improving the operability of the brush cutter and reducing fatigue. Also, since the battery device does not serve as a grounding part, the battery device may get wet when the brush cutter is lowered to the ground.

Impact can be avoided. moreover.

Since the battery device is attached to the brush cutter, it is possible to eliminate the trouble of connecting the battery device to the starting motor when starting the brush cutter.

In the invention of claim 2, since the battery device has flexibility that allows it to be rolled and unfolded, it can be freely attached to and removed from the support pipe by winding and unfolding the battery device. , which is advantageous when replacing the battery and adjusting the position of the battery device in the longitudinal direction of the support pipe.

In claim 3, the position of the battery device in the longitudinal direction of the support pipe is adjusted. When mowing grass on slopes, etc., the mowing blade side of the brush cutter may be placed higher than the power unit side. In such cases, the battery device should be moved towards the handle and the shoulder strap should be moved. It is possible to reduce the rotational moment of the cutting blade with respect to the part where the support pipe is held by the operator via the utility band, etc., and it becomes easier to lift the cutting blade.

In the invention of claim 4, a plurality of t
ft battery shape type battery is held.

The plurality of dry battery-shaped batteries are arranged in a row such that their axial directions are parallel to each other, and are movable relative to each other in a direction perpendicular to the extending direction of the battery device. Therefore, the battery device including the combination body and a plurality of dry cell-shaped batteries can be freely rolled and expanded.

In the invention of claim 5, by unfolding the joint and removing the lid from the case body, it is possible to easily draw out and load the dry battery type battery from the battery device.

In the invention of claim 6, since the combined body can be manufactured by injection molding, the manufacturing of the combined body is simplified.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and Fig. 1 is a perspective view of the entire brush cutter, Fig. 2 is a perspective view of the battery device when it is unfolded, and Fig. 3 is a portion of the support pipe to which the battery device is attached. 4 and 5 are diagrams showing the working situation using the brush cutter, and Figures 6 and 7 are the arrangement and connection state of a plurality of dry cell type secondary batteries in the battery device. 8 and 9 are exploded views and assembled views of the battery device equipped with the first example of the combined body 36, and FIGS. 10 (a) to C), FIGS. 11 and 12 are manufacturing process diagrams of a battery device including a second example of the combined body, a perspective view of the band for tightening, and a completed view for assembly. 10... Brush cutter, 12... Support pipe, 14...
Power unit, 16...Engine, 18...Starting motor, 22...Mowing blade, 24...Handle, 28...Battery device, 34...Dry cell type secondary battery ('Dry battery) shape type battery), 36.'... Combined body, 38... Hook-shaped metal fitting (connection tool), 4o... Loop-shaped metal fitting (connection tool), 60... Case body, 62... Storage space , 64・
...Lid, 76...Injection molded product. Figure 1 14: Power section 16: Engine 28: Battery device Figure 2 Figure 6 Figure 4 Figure 5 Figure 6 Figure 8 Figure 9 Figure 10 Figure 11 June 23, 1988 Director General of the Japan Patent Office Yoshi 1) Mr. Moon Tsuyoshi■, Indication of the case 1988 Patent Application No. 1271717 2, Title of invention Starter device and battery device for brush cutter 3, Person making amendment case Relationship with Patent applicant Name Maruyama Seisakusho Co., Ltd. 4 Detailed explanation of the invention in the agent's specification 6 Contents of the amendment (as attached) (6, Contents of the amendment) In the specification ■) Page 9 [ 2) On page 17, lines 9 and 10, correct "according to the force" in line 6 as follows, and "by small force". The battery device is

Claims (6)

[Claims] (1) A power unit (14) includes an engine (16) and a starting motor (18) that forcibly rotates the engine (16) at the time of starting, and is attached to one end of the support pipe (12). , the cutting blade (22) is connected to the support pipe (1).
2) The brush cutter (1) is equipped on the other end side and the handle (24) is attached to the middle part of the support pipe (12).
0), a battery device (28) that supplies power to the starting motor (18) is connected to the support pipe (12).
A starter for a brush cutter, characterized in that the starter is attached to the support pipe (12) on the side of the cutting blade (22) with respect to the handle (24) so as to annularly surround the outside in the radial direction of the starter. Device. (2) A power unit (14) includes an engine (16) and a starting motor (18) that forcibly rotates the engine (16) at the time of starting, and is attached to one end of the support pipe (12). , the cutting blade (22) is connected to the support pipe (1).
2) The brush cutter (1) is equipped on the other end side and the handle (24) is attached to the middle part of the support pipe (12).
In 0), a battery device (28) that supplies electric power to the starting motor (18) is flexible enough to be rolled and expanded, and surrounds the support pipe (12) in a radial direction outside in an annular shape. A starter device for a brush cutter, characterized in that the starter device is attached to the support pipe (12) on the side of the cutting blade (22) with respect to the handle (24). (3) The battery device (28) includes the support pipe (
12) The starter device for a brush cutter according to claim 1 or 2, wherein the position in the longitudinal direction is adjustable. (4) Combine and hold a plurality of dry battery-shaped batteries (34) arranged in a row so that their axes are parallel to each other and the plurality of flexible dry battery-shaped batteries (34). A battery device comprising: a connecting body (36) that connects the connecting body (36); and connectors (38, 40) that connect both ends of the connecting body (36) in a separable manner. (5) The combined body (36) includes a case body (60) and a storage space (62) formed in the case body (60), which is open at one end and stores the dry cell-shaped battery (34).
The battery device according to claim 4, further comprising: a lid (64) that is placed over the case body (60) so as to close the opening of the storage space (62). (6) The combined body (36) is an injection molded product (76) in which the plurality of dry battery-shaped batteries (34) are embedded.
5. The battery device according to claim 4, further comprising: