JPH0636688B2 - Starter device and battery device for brush cutter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter device and a battery device for a brush cutter used for mowing and the like, and more specifically to a battery device in consideration of weight balance in the brush cutter. The present invention relates to a starter device and a battery device to which is attached.

[Conventional technology]

In the brush cutter, the power unit is attached to the upper end of the support pipe. Starting an engine using a motor
It is convenient and easy to start even for weak women and old people. However, when the brush cutter is equipped with the starter device, a battery device for supplying electric power to the motor is required.

In a conventional brush cutter with a starter device, the battery device is
(a) Placed under the power unit, (b) Attached to a stand for standing the brush cutter when it is placed on the ground, (c) Not attached to the brush cutter itself, It is stored and worn in your pocket or waist.

Generally, the weight of the starter device is 1 to 1.5 kg, and the weight of the brush cutter equipped with the starter device is increased by 20% as compared with that of the brush cutter without the starter device. The weight of only the battery device is generally 0.5 to 0.6 kg.

[Problems to be solved by the invention]

In the case of (a), the center of gravity of the brush cutter is located rearward, increasing the operator's feeling of fatigue and increasing the load applied to the joint between the support pipe and the power unit, and it is necessary to increase the strength of the joint. is there. In addition, when the brush cutter is placed on the ground, the battery device is likely to get wet or receive a large impact. further,
When fuel is injected into the fuel tank of the power unit, there is a risk of ignition when spilled fuel adheres to the battery device.

In the case of (b), the center of gravity of the brush cutter is slightly moved forward as compared with the case of (a), but the center of gravity is biased rearward. Also,
When the brush cutter is placed on the ground, as in (a),
A large shock is applied to the battery device. further,
When the brush cutter is dropped on a soft ground, the stand may sink into the ground and the battery device may get wet.

In the case of (c), it is necessary to connect the battery devices to the starting motors one by one at the time of starting, which complicates the starting work.

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

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

[Means for solving problems]

The present invention will be described using the reference numerals of the drawings corresponding to the embodiments.

According to claim 1, in the brush cutter (10), the power section (14) includes an engine (16) and a starting motor (18) for forcibly rotating the engine (16) at the time of starting, and a support pipe ( 1
The cutting blade (22) is mounted on the other end of the support pipe (12), and the handle (24) is attached to the middle part of the support pipe (12). And such a brush cutter (10)
In the starter device, the battery device (28) for supplying electric power to the starting motor (18) surrounds the support pipe (12) in the annular direction on the outside in the radial direction. 2
It is attached to the support pipe (12) on the 2) side.

In Claim 2, in the brush cutter (10), the power section (14) includes an engine (16) and a starting motor (18) for forcibly rotating the engine (16) at the time of starting, and a support pipe ( 1
The cutting blade (22) is mounted on the other end of the support pipe (12), and the handle (24) is attached to the middle part of the support pipe (12). And such a brush cutter (10)
In the starter device, the battery device (28) for supplying electric power to the starting motor (18) has flexibility such that it can be wound and deployed, and surrounds the support pipe (12) in the radial outside in a ring shape. The support pipe (1) on the cutting blade (22) side with respect to the handle (24).
It is installed at the location of 2).

In the invention of claim 3, the battery device (28) is further capable of adjusting the position of the support pipe (12) in the longitudinal direction.

The battery device (28) according to claim 4, wherein a plurality of dry battery shaped batteries (34) are arranged in a line so that their axial directions are parallel to each other, and a plurality of flexible and dry battery shaped batteries. (3
It has a combined body (36) for connecting and holding 4) and connecting tools (38, 40) for connecting the both ends of this combined body (36) in a separable manner.

In claim 5, the combination body (36) further comprises a case body (60).
And a storage space (62) formed in the case body (60) and opened at one end to store the dry cell shape type battery (34), and a case body (60) so as to close the opening of the storage space (62). And a lid (64) which can be covered.

In claim 6, the combination (36) further comprises an injection molded article (76) having a plurality of dry cell shaped batteries (34) embedded therein.

[Action]

In the inventions of claims 1 and 2, the battery device (28) is sufficiently forward of the position where the operator (50) carries the weight of the brush cutter (10) through the shoulder strap (48) and the like. The position is reached, and the front and rear rotational moments with respect to the carrying point are balanced.

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

According to the invention of claim 3, the battery device (28) further comprises a support pipe (1) in which the longitudinal position of the support pipe (12) is adjusted.
Mounted on 2). This allows the worker 50 to
The rotational moments of the power section (14) side and the cutting blade (22) side change with respect to the carrying point of (10).

In the battery device (28) according to claim 4, the joint body (36) itself is bendable in a direction perpendicular to the extending direction of the joint body (36),
The plurality of dry cell shaped batteries (34) are also displaceable in the extending direction of the combined body (36). As a result, dry cell shape type battery
The row of (34) and the combined body (36) are bent by the minimum force of winding and unfolding of the dry cell shaped battery (34).

In the battery device (28) according to claim 5, the dry battery shape battery (34) is stored in the storage space (62) of the case body (60), whereby the dry battery shape battery (34) is combined (36). ).

The battery device (28) according to claim 6, wherein the dry battery shaped battery (3
4) is embedded in the injection molded product (76) and injection molded, and the injection molded product (76) holds the dry battery shaped battery (34).

〔Example〕

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

FIG. 1 is a perspective view of the entire brush cutter 10. The brush cutter 10 has a support pipe 12 extending in a straight line, and a power unit 14 is provided for the engine 16 and a lower part of the power unit 14 for forcibly rotating the engine 16 when the engine 16 is started. And a motor 18 and 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 is connected from the power unit 14 to the transmission shaft 46 (FIG. 3) in the support pipe 12 and the gear box.
It is transmitted through a gear (not shown) in 20 and is rotated by power. The handle 24 is a support pipe
With respect to the longitudinal direction of 12, the longitudinal position is adjustable at a position close to the power unit 14 so that the longitudinal direction is adjustable, and the supporting pipe 12 is extended to the left and right, and grips 25 are attached to both ends. The throttle lever 26 and the starting switch are located at the handle 24 near the right and left grips 25, respectively.
27 is attached, the throttle lever 26 operates the throttle opening of the engine 16, and the start switch 27 is turned on when the engine 16 is started. The battery device 28 is formed in an annular shape, and the support pipe 12 in the range closer to the cutting blade 22 than the handle 24 is.
The position of the battery device 28 with respect to the longitudinal direction of the support pipe 12 is adjustable.
The battery device 28 is connected via the cord 30 to the starting motor 18 and the starting switch 27, and when the starting switch 27 is ON, the starting motor 18 is supplied with power from the battery device 28 to force the engine 16 to operate. To rotate.

FIG. 2 is a perspective view when the battery device 28 is expanded.
The dry battery shape type secondary battery 34 has the same shape as the dry battery, is made of a secondary battery such as a nickel-cadmium battery, and can be repeatedly charged through a power line. A non-chargeable dry battery can be used instead of the dry battery shaped secondary battery 34. A plurality of dry cell type rechargeable batteries 34
Are arranged in a line so that their axial directions are parallel to each other, and are connected to each other so as to have a voltage capable of driving the starting motor 18 as a whole. Combined body 36 has a predetermined flexibility in the thickness direction, a plurality of dry cell shape secondary batteries 34, so that they do not fall off and separate from each other,
Combined, hold. Hook-shaped metal fittings 38 and loop-shaped metal fittings
40 are attached to both ends in the extending direction of the coupling body 36, and the hook-shaped metal fitting 38 is inserted into and removed from the loop-shaped metal fitting 40 so that they are coupled and separated from each other. The cord 30 has connectors 42 and 44 at both ends, and can be connected to the battery device 28 and the starting motor 18.

FIG. 3 shows a support pipe to which the battery device 28 is attached.
It is a detailed perspective view of 12 places. The transmission shaft 46 extends into the support pipe 12 coaxially with the support pipe 12,
16 powers are transmitted to the gears of the gearbox 20. Since the plurality of dry-cell-shaped secondary batteries 34 are arranged with their axial directions aligned in parallel with each other, they are 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 wound and deployed freely, and the battery device 28 can be attached to the support pipe 12.
When mounting 28, the battery device 28 is wound around the outer periphery of the support pipe 12, so that the battery device 28 surrounds the support pipe 12 in an annular shape, and then the hook-shaped metal fitting 38 and the loop-shaped metal fitting 40 are locked, As a result, the battery device 28 is fixed to the support pipe 12. That is, the hook-shaped metal fitting 38 and the loop-shaped metal fitting 40 are locked to each other so that the annular coupling body 36 becomes a support pipe.
By tightening 12, a predetermined frictional force is generated between the outer periphery of the support pipe 12 and the inner periphery of the combined body 36, and this frictional force prevents the battery device 28 from moving in the longitudinal direction of the support pipe 12. By changing the position of the support pipe 12 around which the battery device 28 is wound, the battery device 28 can be attached to any part of the support pipe 12 within the range from the handle 24 to the cutting blade 22 side.

FIGS. 4 and 5 show a working situation in which the brush cutter 10 is used. The shoulder strap 48 is attached to the portion of the support pipe 12 in the range between the power unit 14 and the handle 24,
The worker 50 places one shoulder inside the shoulder strap 48,
Holds the weight of the brush cutter 10. Grass on level ground 52 by brush cutter 10
When cutting 54 (FIG. 4), the cutting blade 22 is positioned lower than the power unit 14 with respect to the attachment point of the shoulder strap 48 on the support pipe 12, and the brush cutter 10 is used. Therefore, the position of the battery device 28 in the support pipe 12 is relatively toward the cutting blade 22, and the rotational moment of the cutting blade 22 side with respect to the attachment point of the shoulder strap 48 in the support pipe 12 is increased, so that the worker 50 cuts it. Make it easy to hold the blade 22 in a low position. On the other hand, when cutting the grass 54 on the slope 56 with the brush cutter 10 (FIG. 5), the cutting blade 22 is set higher than the power unit 14 with respect to the attachment point of the shoulder strap 48 on the support pipe 12. , The brush cutter 10 is used. Therefore, the position of the battery device 28 in the support pipe 12 is relatively toward the handle 24, the rotational moment of the cutting blade 22 side with respect to the attachment point of the shoulder strap 48 in the support pipe 12 is reduced, and the worker 50 cuts the cutting blade. Make it easy to hold 22 in a high position.

FIGS. 6 and 7 are a plan view and a perspective view showing in detail the arrangement and connection state of the plurality of dry battery type secondary batteries 34 in the battery device 28. The plurality of dry battery-shaped secondary batteries 34 are arranged in a row so that their axial directions are parallel to each other, and + and-are adjacent to each other in opposite directions to form a battery row 57. is doing. Then, in order to reach a voltage that can drive the starting motor 18 as a whole,
They are connected in series. Both ends of the battery row 57 are connected to the cord 58, which is connected to the cord via the connector 42.
It is connected to 30 (Fig. 2).

FIGS. 8 and 9 are an exploded view and a completed assembly view of the battery device 28 including the coupling body 36 of the first example. The case body 60 is made of a soft material such as rubber and has flexibility, and has a storage space 62.
Is formed in the case body 60 with one end opening to the end surface of the case body 60 so as to receive the battery row 57. Lid 64
Is made of the same material as the case body 60, and is fitted and attached to the end surface portion of the case body 60 on the opening side of the storage space 62. code
58 passes through lid 64 and connector 66 is attached to the end of cord 58.

10 (a) to (c), FIG. 11 and FIG. 12 are a manufacturing process diagram of the battery device 28 including the coupling body 36 of the second example, a perspective view of the fastening band 78, and a completed assembly diagram.
In FIG. 10, the upper mold 68 and the lower mold 70 can be joined to each other from above and below, and the pouring port 72 is provided on the central upper surface of the upper mold 68. The battery row 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 is a pouring port 72 for the molten soft resin.
Through the upper mold 68 and the lower mold 70. After the soft resin in the upper mold 68 and the lower mold 70 is solidified, the upper mold 68 and the lower mold 70 are separated, and the injection molded product 76 is taken out. The battery row 57 is embedded in the injection molded product 76, and the cord 58 extends from the injection molded product 76. In FIG. 11, the tightening band 78 is formed in an annular shape, and the hook-shaped metal fitting 38 and the loop-shaped metal fitting 40 are attached to both ends thereof. In FIG.
The tightening band 78 is attached to the periphery of the injection-molded product 76, tightens the injection-molded product 76, and is integrally connected to the injection-molded product 76. The injection-molded article 76 and the tightening band 78 constitute the joint body 36 and have a certain degree of flexibility so that the joint body 36 can be wound and unfolded.

〔The invention's effect〕

In the inventions of claims 1 and 2, since the battery device of the starting motor is attached to the portion of the support pipe on the cutting blade side of the handle, the power unit side and the cutting blade side of the supporting pipe carrying portion by the shoulder strap or the like are provided. The rotational moment is balanced, the operability of the brush cutter is improved, and the feeling of fatigue can be reduced. Further, since the battery device does not serve as the grounding part, it is possible to avoid the battery device from getting wet or being impacted when the brush cutter is lowered to the ground. Furthermore, since the battery device is attached to the brush cutter,
It is possible to eliminate the inconvenience of connecting each battery device to the starting motor at the time of starting.

According to the invention of claim 2, since the battery device has flexibility such that it can be wound and deployed, it can be easily attached to and detached from the support pipe by winding and deploying the battery device. And the adjustment of the position of the battery device in the longitudinal direction of the support pipe.

According to the third aspect, the position of the battery device in the longitudinal direction of the support pipe is adjusted. When cutting grass on slopes and the like, the cutting blade side of the brush cutter may be set higher than the power section side. In such a case, move the position of the battery device toward the handle and use the shoulder strap etc. The rotation moment of the cutting blade side with respect to the carrying portion of the support pipe by the operator via the can be reduced, and the cutting blade side can be easily lifted.

According to the invention of claim 4, the plurality of dry battery shaped batteries are held by the flexible combination, and the plurality of dry battery shaped batteries are arranged such that their axial directions are parallel to each other.
They are arranged in a line and can be displaced relative to each other in a direction perpendicular to the extending direction of the battery device. Therefore, the battery device including the combined body and the plurality of dry battery shaped batteries can be wound and deployed freely.

According to the fifth aspect of the invention, the combined body can be unfolded, and the lid can be removed from the case body to easily pull out and load the dry cell shaped 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 description of drawings]

The drawings relate to an embodiment of the present invention. 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 a support pipe to which the battery device is attached. FIG. 4 and FIG. 5 are detailed perspective views, FIG. 4 and FIG. 5 are views showing working conditions using a brush cutter, and FIG. 6 and FIG. 7 are arrangements and connection states of a plurality of dry cell type secondary batteries in a battery device. FIG. 8 is a plan view and a perspective view showing in detail, FIG. 8 and FIG. 9 are an exploded view and a completed assembly view of a battery device including the coupling body 36 of the first example, FIG. 10 (a) to (c), and FIG. 11 and 12 are a manufacturing process diagram, a perspective view of a fastening band, and a completed assembly diagram of a battery device including the combined body of the second example. 10 ... Mower, 12 ... Support pipe, 14 ... Power part, 16
... engine, 18 ... starting motor, 22 ... cutting blade, 24 ...
Handle, 28 ... Battery device, 34 ... Dry-cell-shaped secondary battery (dry-cell-shaped battery), 36 ... Combined body, 38 ... Hook-shaped metal fitting (coupling tool), 40 ... Loop-shaped metal fitting (coupling tool), 60 ... Case Body, 62 ... Storage space, 64 ... Lid, 7
6 ... Injection molded product.

Claims (6)

[Claims] 1. A starting motor (18) for which a power unit (14) forcibly rotates the engine (16) at the time of starting.
And a cutting blade (22) is provided at the other end of the support pipe (12), and a handle (24) is provided in the middle of the support pipe (12). In the brush cutter (10) attached to the section, the starting motor (1
A battery device (28) for supplying electric power to 8) supports the cutting blade (22) side with respect to the handle (24) so as to annularly surround the support pipe (12) in the radial direction. Pipe (1
A starter device for a brush cutter, which is installed at the position of 2). 2. A starting motor (18) for which a power section (14) forcibly rotates the engine (16) at the time of starting.
And a cutting blade (22) is provided at the other end of the support pipe (12), and a handle (24) is provided in the middle of the support pipe (12). In the brush cutter (10) attached to the section, the starting motor (1
A battery device (28) for supplying electric power to 8) has flexibility such that it can be wound and deployed, and the handle (24) is arranged so as to surround the support pipe (12) in the radial direction in an annular shape. A starter device for a brush cutter, which is attached to a portion of the support pipe (12) on the cutting blade (22) side. 3. The battery device (28) comprises the support pipe.
The starter device for a brush cutter according to claim 1 or 2, wherein the position of (12) in the longitudinal direction is adjustable. 4. A plurality of dry battery shaped batteries (34), which are arranged in a line so that their axial directions are parallel to each other, and are flexible and combined with each other. A battery device comprising: a holding body (36) for holding and a connecting tool (38, 40) for connecting both ends of the body (36) in a separable manner. 5. The combination body (36) includes a case body (60) and a storage space (62) formed in the case body (60) and opened at one end to store the dry cell shape type battery (34). The battery device according to claim 4, further comprising: a lid (64) that covers the case body (60) so as to close an opening of the storage space (62). 6. The battery device according to claim 4, wherein the combined body (36) includes an injection molded product (76) in which the plurality of dry battery shaped batteries (34) are embedded.