JP7133365B2 - chainsaw - Google Patents

Description

The present invention relates to a chain saw provided with a power cord for supplying power to a drive that rotates the saw chain.

Such a chain saw comprises a casing containing a driving part, a guide bar formed in the front part of the casing, a saw chain circling along the outer periphery of the guide bar, and a handle part formed in the rear part opposite to the front part of the casing. and a power cord for supplying power to the drive unit. The power cord is provided so as to protrude rearward from the rear end of the handle portion.

Japanese Patent No. 5476986

In Patent Literature 1, the power cord protrudes rearward from the rear end of the handle portion, so that the front and rear dimensions of the chain saw become large, and there is an inconvenience that the storage dimension becomes large.

SUMMARY OF THE INVENTION In view of the above situation, the present invention aims to provide a chain saw that can be stored in a small size.

In order to solve the above-described problems, the chain saw of the present invention includes a casing that houses a drive unit, a guide bar that is configured in the front part of the casing, a saw chain that goes around along the outer circumference of the guide bar, and the casing. and a power cord for supplying power to the driving portion, the power cord being further rearward than the rear portion of the casing and the handle characterized by extending from a region further below the bottom of the part.

According to the above configuration, the power cord extends rearward from the rear portion of the casing and from a region further below the bottom portion of the handle portion, whereby the power cord extends rearward from the rear end of the handle portion. The front-to-rear dimension of the chain saw can be kept small compared to .

Moreover, the chain saw of the present invention may include a cord holder that holds the power cord, and the rear end of the cord holder may be positioned forward of the rear end of the handle portion.

According to the above configuration, since the rear end of the cord holder does not protrude rearward from the rear end of the handle portion, the power cord does not interfere with work.

Further, the chain saw of the present invention includes a cord holder that holds the power cord, the cord holder extending rearward from the rear end of the casing and positioned below the bottom of the handle portion, and The rear end of the may be located forward of the rear end of the handle portion.

According to the above configuration, since the cord holder is positioned below the bottom of the handle portion, the handle portion can prevent the cord holder from coming into contact with other objects during the cutting operation. Also, since the rear end of the cord holder does not protrude rearward from the rear end of the handle, the power cord does not interfere with work.

Moreover, the chain saw of the present invention may have a surface for pushing the chain saw forward at the rear end of the handle portion.

According to the above configuration, the chain saw can be pushed forward by manually pushing the surface provided at the rear end of the handle portion, which is advantageous for cutting work that puts a heavy load on the user.

ADVANTAGE OF THE INVENTION According to this invention, the front-back dimension of a chain saw can be suppressed small.

1 is a side view of a chain saw of the present invention; FIG. It is a side view which shows the attachment part of a cord holder. It is a bottom view of the chain saw. It is a rear view of the chain saw. It is a front view of the same chain saw. It is a perspective view of the same chain saw. Fig. 2 is a perspective view of a state in which both hands are attached to the chain saw; FIG. 5 is a side view of the chain saw of another first embodiment; FIG. 11 is a rear view of the chain saw of another first embodiment; FIG. 11 is a side view of a chain saw according to another second embodiment; It is a bottom view of the chain saw of other 2nd Embodiment. FIG. 11 is a rear view of a chain saw according to another second embodiment;

Hereinafter, the chain saw of the present invention will be described with reference to the drawings. In the following description, the front-rear direction and left-right direction of the chain saw 1 are assumed to be the directions shown in FIG.

1 to 7 show a handheld chain saw 1. FIG. This chain saw 1 includes a casing 2 housing an electric motor (not shown) as a driving part, a front handle 3 protruding leftward from the left side of the front side of the casing 2, and A hand guard 4 protruding leftward, a main handle (handle portion) 5 protruding rearward from the rear portion 2C of the casing 2, a guide bar 6 protruding forward from the front side portion of the right side surface of the casing 2, and a guide bar 6. and a power cord 8 for supplying electric power to the electric motor.

The guide bar 6 is made of metal, and the saw chain 7 is in contact with the outer circumference of the guide bar 6 while it goes around. A guide groove (not shown) is formed on the outer circumference of the guide bar 6, and a drive link (not shown) constituting the saw chain 7 is inserted into the guide groove to guide the movement.

A driving sprocket 9 driven by a driving force from a driving motor is provided immediately behind the guide bar 6 in the casing 2, and a saw chain 7 is wound around the driving sprocket 9 (the saw chain 7 is omitted in FIG. 3). ), the saw chain 7 is rotated by driving the drive sprocket 9 . The drive sprocket 9 and the right side of the base end (rear end) of the guide bar 6 are covered with a protective cover 10 .

The casing 2 includes a first casing portion 2A that mainly houses the electric motor, and a second casing portion 2B that mainly houses a power transmission mechanism (not shown) that transmits power from the electric motor to the drive sprocket 9 . The second casing portion 2B is configured to have larger dimensions than the first casing portion 2A. The first casing portion 2A is arranged to protrude leftward from the left side surface on the rear side of the second casing portion 2B.

As shown in FIG. 6, the front handle 3 includes a first handle portion 3A extending leftward from the left side of the front end of the upper end of the second casing portion 2B, and a first handle portion 3A extending downward from the left end of the first handle portion 3A. It also has a second handle portion 3B in a tilted posture positioned rearward toward the lower side. The lower end of the second handle portion 3B is integrated with the upper end portion of the left end portion of the first casing portion 2A.

As shown in FIGS. 5 and 6, the hand guard 4 has a substantially rectangular plate shape and is screwed to the left side surface of the front end of the casing. In the upper half of the hand guard 4, a laterally long first opening 4A is formed. In addition, in the lower half of the hand guard 4, a vertically elongated second opening 4B is formed at the left end, and a horizontally elongated third opening 4C smaller than the second opening 4B is formed at the center of the left and right and at the upper end. A substantially square fourth opening 4D that is smaller than the second opening 4B is formed at the right end and at the lower end, but the number of openings and the position or shape of the openings can be freely changed.

In addition, a holding portion 12 for holding an L-shaped hexagon wrench 11 as an accessory tool is provided on the lower portion of the rear surface of the hand guard 4 . The holding portion 12 has a ring-shaped engaging portion 12A that can be engaged by inserting the short shaft side portion 11A of the L-shaped hexagon wrench 11 from above, and the short shaft side portion 11A is engaged with the engaging portion 12A. A pair of upper and lower engaging pieces 12B, 12B for engaging the long shaft side portion 11B of the L-shaped hexagonal wrench 11 by rotating the L-shaped hexagonal wrench 11 around the axis of the short shaft side portion 11A. and

As described above, by attaching the L-shaped hexagon wrench 11 to the rear surface of the hand guard 4, visibility is good during cutting work with the chain saw 1 or when transporting the chain saw 1, and an accessory tool (here, L-shaped This has the effect of preventing the loss of the hexagon wrench 11, but other tools may also be used. Attached tools provided on the rear surface of the handguard 4 are passed through the openings 4B, 4C, and 4D (three here, but may be one, two, or four or more) of the handguard 4 from the front side of the chain saw 1. can also be visually recognized (see FIG. 5), the effect of preventing the loss of the attached tool is enhanced. Although the attached tool is used for attaching and detaching the protective cover 10 and for adjusting the tension of the saw chain 7, it may be used for other purposes.

The main handle 5 includes a grip portion 5A extending rearward from the rear portion of the upper end portion of the second casing portion 2B, and a support portion 5B for increasing the strength of the grip portion 5A. The support portion 5B is integrated with the first support portion 5b extending downward from the rear end of the grip portion 5A and the lower rear end of the second casing portion 2B extending forward from the lower end of the first support portion 5b. and a second support portion 5c.

The first support portion 5b is configured in an inclined posture that is located forward toward the lower side, and the weight of the main handle 5 can be reduced compared to the case of configuring in a vertical posture. A surface 13 for pushing the chain saw 1 forward is formed at the rear end of the first support portion 5b. By pushing this surface 13 by hand, the chain saw 1 can be pushed forward, which is advantageous for the cutting work that puts a heavy load on the user.

A plate-like finger guard portion 14 that is long in the front-rear direction and protrudes rightward over substantially the entire front-rear direction is integrally formed on the right side surface of the second support portion 5c. A rear end portion of the finger guard portion 14 slightly extends obliquely upward along the first support portion 5b (see FIG. 2).

The upper end of the second casing portion 2B is provided with a first support portion 15 and a second support portion 16 on which the user's fingers can be placed (see FIG. 6). The first support portion 15 is formed at the rear end portion of the upper end of the second casing portion 2B, that is, in front of the main handle 5. As shown in FIG. The first support portion 15 is formed on a rearward-rising sloping surface located upward toward the rear side, on which the thumb of the right hand holding the main handle 5 can be placed (see FIG. 7). The second support portion 16 is formed at the front end portion of the upper end of the first casing portion 2</b>A, that is, at a position on the right side and front side of the front handle 3 . The second support portion 16 is formed on a front-down sloped surface that slopes slightly downward toward the front, so that the thumb of the left hand that grips the front handle 3 can be placed thereon (see FIG. 7). The second support portion 16 is positioned in front of the first support portion 15 . Thus, by placing the thumbs of the hands holding the two handles 3, 5 on the two support portions 15, 16 respectively, the hands holding the two handles 3, 5 can hold the handles stably. Therefore, the cutting work by the chain saw 1 is facilitated. A wall portion 16A that rises upward is formed at the front end of the second support portion 16, and the thumb of the left hand placed on the second support portion 16 can be prevented from moving forward by being caught by the wall portion 16A. .

The power cord 8 extends from a region R (see FIGS. 2 and 3) behind the rear portion 2C of the casing 2 and on the bottom side (lower side) than the bottom portion 5C of the main handle 5. As shown in FIG. Specifically, the power cord 8 is routed inside the device to the rear portion 2C of the casing 2, and protrudes from the region R via a cord holder 17 that holds the power cord 8. As shown in FIG. The cord holder 17 extends rearward from the rear end 2Z of the casing 2 and is positioned closer to the bottom than the bottom portion 5C of the main handle 5, and the rear end 17T of the cord holder 17 is forward of the rear end 5Z of the main handle 5. (see Figure 1). More specifically, the cord holder 17 is positioned directly below the bottom portion 5C of the main handle 5 and substantially in the center of the main handle 5 in the left-right direction, and extends linearly rearward. The cord holder 17 is made of a harder material than the power cord 8, and has a substantially cylindrical shape with an outer diameter that decreases toward the rear end. With this configuration, the power cord 8 is held by the cord holder 17 . Moreover, the front end of the cord holder 17 is provided with a stepped portion 17A (see FIG. 2) having a slightly larger outer diameter. The stepped portion 17A is sandwiched between the half-split projecting portions 18 (see FIGS. 2 and 3) projecting rearward from the rear end 2Z of the casing 2, thereby preventing the cord holder 17 from moving forward and backward. be. That is, the cord holder 17 extends rearward from the projecting portion 18 .

In this way, the power cord 8 extends from the rear side of the rear portion 2C of the casing 2 and from the region R on the bottom side of the bottom portion 5C of the main handle 5, so that the power cord 8 can be Compared to the structure extending rearward from the end 5Z, the front-to-rear dimension of the chain saw 1 can be reduced. Further, since the cord holder 17 is positioned closer to the bottom than the bottom portion 5C of the main handle 5, the main handle 5 can prevent the cord holder 17 from contacting other objects during the cutting operation. Also, since the rear end 17T of the cord holder 17 does not protrude rearward from the rear end 5Z of the main handle 5, the power cord 8 does not become an obstacle.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

In the above-described embodiment, the cord holder 17 is provided so as to extend rearward from the rear end 2Z of the casing 2, but it may be provided so as to extend rearward from the rear portion 2C positioned slightly forward of the rear end 2Z of the casing 2. good. Also, the cord holder 17 may be provided as shown in FIGS. 8 and 9, or may be provided as shown in FIGS. The parts other than the cord holder 17 have the same structure as those shown in FIGS. 1 to 7. FIG. 8 and 9, the cord holder 17 is provided so as to extend straight downward from a half-split projecting portion 19 that is integrally formed on the bottom portion 5C of the main handle 5 so as to project downward. In this case as well, the power cord 8 is configured to extend from a region R behind the rear portion 2C of the casing 2 and on the bottom side of the bottom portion 5C of the main handle 5 . In FIG. 8, the cord holder 17 is provided so as to extend downward from the rear end of the bottom portion 5C of the main handle 5, but it may be provided so as to extend from the front end portion or the longitudinally intermediate portion of the bottom portion 5C of the main handle 5. good. 10 to 12, a cord holder 17 holding a power cord (not shown) routed to below the bottom portion 5C of the main handle 5 is attached to the left side of the projecting portion 20 projecting downward from the bottom portion 5C of the main handle 5. It is provided so as to extend leftward from the . In this case as well, the power cord 8 is configured to extend from a region R behind the rear portion 2C of the casing 2 and on the bottom side of the bottom portion 5C of the main handle 5 . 10 to 12, the cord holder 17 is oriented along the left-right direction, but it may be oriented in a direction intersecting with the left-right direction.

Further, although the front handle 3 and the main handle 5 are provided in the above embodiment, the front handle 3 may be omitted.

DESCRIPTION OF SYMBOLS 1... Chain saw 2... Casing 2A... First casing part 2B... Second casing part 2C... Rear part 2Z... Rear end 3... Front handle 3A... First handle part 3B... Second handle part 4 Hand guard 4A First opening 4B Second opening 4C Third opening 4D Fourth opening 5 Main handle (handle portion) 5A Grip 5B Support 5C Bottom 5b First support 5c Second support 5Z Rear end 6 Guide bar 7 Saw chain 8 Power cord 9 Drive sprocket 10 Protective cover 11 L-shaped hexagon Bar wrench 11A Short shaft side portion 11B Long shaft side portion 12 Holding portion 12A Engaging portion 12B Engaging piece 13 Surface 14 Finger guard portion 15 First support portion , 16... Second support part 16A... Wall part 17... Cord holder 17A... Stepped part 17T... Rear end 18, 19, 20... Protruding part, R... Region

Claims (4)

a casing comprising: a first casing portion that houses an electric motor; and a second casing portion that is larger than the first casing portion and houses a power transmission mechanism that transmits power from the electric motor to a drive sprocket ;
a guide bar configured at the front of the casing;
a saw chain that goes around along the outer periphery of the guide bar;
a handle portion protruding rearward from the rear portion of the upper end portion of the second casing portion;
a power cord that supplies power to the electric motor ;
a cord holder that holds the power cord ,
the power cord extends from a region further rearward than the rear portion of the casing and further below the bottom portion of the handle portion ;
A chain saw , wherein the cord holder is positioned between an upper end portion and a lower end portion of the first casing portion in the vertical direction . 2. The chain saw according to claim 1 , wherein the lower end of the handle portion is positioned between the upper end and the lower end of the first casing portion in the vertical direction . further comprising a front handle positioned in front of the handle portion and extending in the left-right direction;
3. The chain saw according to claim 1 , wherein the cord holder is positioned below the lower end of the front handle in the vertical direction . The chain saw according to any one of claims 1 to 3 , wherein the cord holder slopes upward as it separates from the casing .

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