JPH0248164A - Chain saw - Google Patents

Abstract

PURPOSE:To facilitate the handling of a chain saw within a narrow operation area by providing a adjustment mechanism which is turned to adjust the chain saw for the setting position thereof through the turning axis of a driving wheel, between a chain saw guide member and a main frame. CONSTITUTION:When the driving source of a chain saw 22 is driven, the chain saw 22 engaged with a driving wheel is turned about a guide member 21. An adjustment mechanism A1 is put between the guide member 21 and when a turning frame 16 and a worm 25 is turned using a control button 26, a turning member 19 having a worm wheel part 23 is turned together with the guide member 21 through the axis of a driving wheel so that the chain saw 22 is adjusted for the setting position. Both the main frame 12 of a body frame 11 and a sub frame 13 containing the disk part of a turning frame 16 are joined and tightened with each other by the screw-up of a fixing ring 15 so that the turning frame 16 can be turned with respect to the sub frame 13, that is, the direction of the chain saw 22 can be changed to the horizontal or the vertical direction. Thus the chain saw may be improved for the operability in a narrow area.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention includes an endless saw chain that can revolve around a guide member, and a drive wheel that is rotated by a drive source and meshes with the saw chain. The present invention relates to a chainsaw in which a power transmission mechanism for transmitting rotation of a drive source to a drive wheel is attached to a main body frame, and particularly relates to a portable chainsaw.

[Conventional technology]

Conventionally, in this type of chainsaw, the rotation of a drive source attached to the main body frame 1 shown in FIG. An endless saw chain is configured to move around the guide member.

[Problem to be solved by the invention]

However, in the above-mentioned chainsaw, since there is no mechanism for adjusting the position of the cutting operation section 2 equipped with the saw chain with respect to the main body frame 1, for example, as shown in FIG. An opening W for installing a ventilation fan on the side wall W in a narrow work space S near the ceiling such as a kitchen.
In the case of forming a, the entire working space S is occupied by the chainsaw, which not only makes handling the chainsaw extremely inconvenient, but also forces the operator into an unreasonable posture, which increases fatigue.

Furthermore, if the operator is forced to take an unreasonable posture, an excessive load will be applied especially to the cutting operation section 2, and there is a risk that the chainsaw will be damaged. Furthermore, when using a conventional chainsaw to cut water pipes buried in the ground during gas and water piping work, it is not only necessary to create a working hole that is wider than the entire length of the chainsaw. , it becomes necessary to pay close attention to the gas pipes adjacent to the water pipes, which also increases the burden on the workers.

On the other hand, in order to make it easier to handle the chainsaw in a narrow work space, it is possible to reduce the size of the entire chainsaw, but in that case, the length of the saw chain will decrease, reducing the cutting ability and reducing the overall size of the chainsaw. A new problem arises in that the product life is shortened and, furthermore, the output of the drive source is reduced, leading to a reduction in work efficiency.

This invention was made in order to solve the above-mentioned problems all at once, and its purpose is to enable the chainsaw to be easily handled even in a narrow working space without causing a decrease in the output of the chainsaw. To provide a chainsaw that can reduce the burden on a worker.

[Means to solve the problem]

In order to achieve the above object, in the first chainsaw of the present invention, an adjustment mechanism is provided between the guide member and the main body frame for rotationally adjusting the arrangement position of the saw chain around the rotation axis of the drive wheel. has been established.

It is desirable to provide an actuation mechanism between the adjustment mechanism and the power transmission mechanism, which automatically operates the adjustment mechanism in conjunction with the operation of the power transmission mechanism. Alternatively, an actuation mechanism that automatically operates the adjustment mechanism may be provided between the adjustment mechanism and the output shaft of the drive source. Furthermore, a dedicated adjustment drive source may be connected to the adjustment mechanism.

Further, in the second chainsaw, the main body frame is composed of a main frame that supports the drive source, a subframe that supports the power transmission mechanism and the saw chain,
A subframe is connected to the main frame so that its rotational position can be adjusted around an output shaft of the drive source, and a subframe is connected to the main frame between the output shaft of the drive source and the input shaft of the power transmission mechanism. An interlocking mechanism is provided to ensure power transmission between both wheels regardless of the connection position.

Furthermore, the third chainsaw is provided with a rotating frame that supports the saw chain and the drive wheel, and supports the rotating frame so as to be rotatable around an axis that intersects the rotational axis of the drive wheel. An adjustment mechanism is provided between the frame and the main body frame, and an adjustment mechanism is provided between the drive wheel and the power transmission mechanism to adjust the position of the rotation frame with respect to the main body frame. A linkage mechanism is provided to ensure power transmission between the two regardless of the relationship.

Also, between the adjustment mechanism and the power transmission mechanism in the third chainsaw, an operation mechanism is provided that automatically operates the adjustment mechanism in conjunction with the operation of the power transmission mechanism, or an operation mechanism is provided between the adjustment mechanism and the output shaft of the drive source. It is desirable to provide an actuation mechanism that automatically operates the adjustment mechanism between the two or to connect the adjustment mechanism to a dedicated adjustment drive source.

[Effect]

In each of the chainsaws, when the drive source is rotated,
The rotation is transmitted to a drive wheel by a power transmission mechanism, and a saw chain meshing with the drive wheel is rotated along the guide member. In the first chainsaw, the arrangement position of the saw chain is rotationally adjusted about the rotation axis of the drive wheel by an adjustment mechanism provided between the guide member and the main body frame. Furthermore, if an actuation mechanism is provided between the adjustment mechanism and the power transmission mechanism, the position of the saw chain can be automatically adjusted in accordance with the operation of the power transmission mechanism. Furthermore, if an actuation mechanism is provided between the adjustment mechanism and the output shaft of the drive source, the placement position of the saw chain can be automatically adjusted as the output shaft rotates.

In the second chainsaw, by adjusting the rotational position of the subframe, the placement position of the saw chain with respect to the main frame is adjusted, and power is transmitted to the output shaft of the drive source regardless of the connection position of both frames after adjustment. Power transmission to and from the input shaft of the mechanism is ensured by the interlocking mechanism.

In the third chainsaw, when the arrangement position of the rotation frame is adjusted by the adjustment mechanism between the rotation frame and the main frame, the arrangement position of the saw chain on the rotation frame with respect to the main frame is adjusted. The linkage mechanism ensures power transmission between the drive wheel and the power transmission mechanism, regardless of the placement position of the saw chain.

Furthermore, if an actuation mechanism is provided between the adjustment mechanism and the power transmission mechanism, the position of the saw chain can be automatically adjusted in accordance with the operation of the power transmission mechanism. If an operating mechanism is provided between the output shaft of the drive source and the adjustment mechanism, the placement position of the saw chain will be automatically adjusted as the output shaft rotates, and even if a dedicated adjustment drive source is connected to the adjustment mechanism, The placement position of the saw chain can be automatically adjusted.

〔Example〕

Hereinafter, a first embodiment of a chainsaw embodying the present invention will be described in detail with reference to FIGS. 1 to 9.

As shown in FIG. 1, the main body frame 11 of the chainsaw
is composed of a substantially cylindrical main frame 12 and a frame-shaped sub-frame 13, each of which has an open end at opposite ends, and has a handle 11 on the outer surface of the main frame 12.
A is attached.

A fixing ring 15 rotatably attached to the outer periphery of the sub-frame 13 is screwed into a male threaded portion 14 provided on the outer periphery of the opening of the main frame 12, thereby connecting and fixing both frames 12 and 13. ing.

As shown in FIGS. 7 and 8, a rotating frame 16 having a support plate portion 16a and a disk portion 16b fixed to one side of the support plate portion 16a is disposed within the subframe 13. , the disk portion 16b is rotatably supported by a support shaft 16C extending in a direction perpendicular to the connecting direction of both frames 12.13. A rotation shaft 17 perpendicular to the rotation axis of the disk portion 16b is rotatably inserted through and supported by the support plate portion 16a, and a drive wheel 18 is attached to the outer end of the rotation shaft 17. As this drive wheel 18, a sprocket wheel or a pin wheel equipped with a plurality of pins that can be engaged with and detached from the saw chain 22 can be used.

On the support plate portion 16a, a rotating member 19 that can rotate on the same axis as the rotating shaft 17 has a ring 20 at its base end.
It is maintained by The rotating member 19 has a guide plate 21 provided with a guide groove 21a for lubricating oil on the outer edge.
is fixed at one end of the guide plate 21, and an endless saw chain 22 with a blade on the outside is attached to the outer periphery of the guide plate 21 so as to be movable in a circumferential direction.
2 is engaged with the drive wheel 18. As the drive wheel 18 rotates, the saw chain 22 is rotated along the outer periphery of the guide plate 21.

An adjustment worm wheel portion 23 centered around the rotation shaft 17 is formed on the threshold edge of the rotation member 19, and
A first adjustment shaft 2 is mounted on the support plate portion 16a of the rotation frame 16.
4 is rotatably supported, and a worm 25 that meshes with the worm wheel portion 23 is attached to one end thereof, and an operating knob 26 is attached to the other end. When the adjustment shaft 24 is rotated by the operation knob 26, the rotation member 19. The guide plate 21 and the saw chain 22 are rotated together around the rotation shaft 17, and the position of the saw chain 22 relative to the subframe 13 is adjusted over a predetermined angular range in the X direction shown in FIG. Note that the worm wheel portion 23. -th adjustment shaft 24. The worm 25 and the operating knob 26 constitute a first adjustment mechanism AI.

Further, a cover 27 that covers the fixed end of the guide plate 21 and the drive wheel 18 is fixed on the rotating member 19, and a scale 28 indicating the rotation adjustment angle of the saw chain 22 is provided on the outer surface of the cover 27. In addition, an index 29 indicating a scale 28 is also attached on the subframe 13.

As shown in FIGS. 6 to 8, an adjusting worm wheel portion 31 is formed on the outer periphery of the disc portion 16b of the rotating frame 16, and the sub-frame 13 is provided with the rotating shaft 16b.
A second adjustment shaft 32 extending parallel to the second adjustment shaft 7 is rotatably supported, and a worm 33 that engages with the worm wheel portion 31 is attached to one end of the second adjustment shaft 32 , and a second adjustment shaft 32 that is connected to the outside of the subframe 13 is attached to the other end of the second adjustment shaft 32 . The operating knob 34 located is attached,
When the second adjustment shaft 32 is rotated by the operation knob 34, the worm 33 and the worm wheel portion 31 are rotated.
The rotating frame 16 is rotated around its rotation axis through engagement with the saw chain 2 on the rotating frame 16.
2 is adjusted over a predetermined angular range in the Y direction of FIG.

Further, as shown in FIG. 5, a scale 37 is attached to the outer surface of the sub-frame 13, and an index 3B is attached to the rotating frame 16, so that when the rotating frame 16 rotates,
The rotation adjustment angle is displayed by both 37 and 38. Note that the worm wheel portion 31. Second adjustment shaft 32. The second adjustment mechanism A2 is controlled by the worm 33 and the operation knob 34.
is configured.

On the other hand, the main frame 12 shown in FIG.
A recess 36 corresponding to each protrusion 35 is provided at the inner edge of the opening 13a of No. 3.
is formed, and by selectively fitting each protrusion 35 of the main frame 12 into each recess 36 of the sub-frame 13, the joining position of both frames 12 and 13 is changed, and the saw chain 22 with respect to the main frame 12 is changed. The arrangement position of the main frame 12 is adjusted in the Z direction shown in FIG. 1 about the central axis of the main frame 12.

Next, to explain the mechanism for driving the saw chain 22, the main frame 12 shown in FIGS. 1 and 3(a) has an output shaft 41 located on its central axis as a drive source. Built-in electric motor (as shown)
A drive gear 42 attached to the output shaft 41 projects outward from the opening 12a of the main frame 12. Figure 3(b).

As shown in FIGS. 6 and 7, a transmission shaft 43 is provided in the subframe 13 with a driven gear 43a that meshes with the drive gear 42 at one end and a bevel gear 43b at the other end.
is rotatably supported by a bearing 44. The driving gear 42 and the driven gear 43a constitute an interlocking mechanism C.

Furthermore, within the subframe 13, the rotating frame 1
An intermediate shaft 45 having a large diameter bevel gear 45a and a small diameter bevel gear 45b is rotatably supported by a bearing 46 on the rotation axis of the transmission shaft 43.
b has a large diameter and is engaged with the bell gear 45a. Furthermore, the small diameter bevel gear 45b is attached to the lower end of the rotating shaft 17.
A small diameter bevel gear 47 that meshes with is attached.

When the output shaft 41 is rotated, the rotation is caused by the rotation of the drive gear 42. The signal is transmitted to the drive wheel 18 on the rotating shaft 17 via the driven gear 43a, the bevel gear 43b, the large-diameter bevel gear 45a, the small-diameter bevel gear 45b, and the small-diameter bevel gear 47. Further, when the coupling position of each frame 12.13 is changed, the meshing position of the driven gear 43a with respect to the drive gear 42 is changed, thereby ensuring power transmission between both gears 42.43a. In addition, each gear 4243a,
43b, 45a, 45b, 47, etc. constitute a power transmission mechanism T, and the small diameter bell gears 45b, 47 constitute a linkage mechanism.

Further, as shown in FIGS. 4 and 8, the support plate portion 16
In a, there is an arc-shaped lubricating oil storage groove 4 centered on the rotation axis 17.
8 is formed, and a lubricating oil supply hole 49 communicating with the subframe 13 is formed approximately in the middle of the lubricating oil storage 448, and the lubricating oil in the subframe 13 is supplied to the supply hole 49.
It passes through and is accommodated in the accommodation groove 48. On the other hand, the rotating member 19
A lubricant oil passage groove 50 is formed in the lubricant oil passage groove 50 , and one end of the lubricant oil passage groove 50 is overlapped with the lubricant oil storage groove 48 regardless of the arrangement position of the rotating member 19 .
The lubricating oil inside passes through the lubricating oil passage groove 50 to the saw chain 2.
2.

Now, using the chainsaw configured as described above, for example, as shown in FIGS. As shown in Figure (C), when cutting water pipes M and gas pipes G at a water or gas piping construction site, in order to perform the work smoothly in the work space S, as necessary, The position of the saw chain 22 relative to the main frame 12 can be adjusted.

That is, after loosening the fixing ring 15 shown in FIGS. 1 and 2 and removing the subframe 13 from the main frame 12, each protrusion 35 shown in FIG. After fitting into each recess 36, by tightening the fixing ring 15, the position of the saw chain 22 relative to the main frame 12 can be easily adjusted in the X direction in FIG. At this time, the meshing position between the driven gear 43a and the driving gear 42 in the interlocking mechanism C is changed,
Power transmission between the output shaft 41 and the transmission shaft 43 is ensured.

Also, if the operating knob 34 shown in FIGS. 5 and 6 is rotated using the scale 37 and indicator 38 shown in FIG. 5 as a guide, the worm 33 on the second adjustment shaft 32 and the rotating frame 16 Through engagement with the worm wheel portion 31, the rotating frame 16 can be rotated in the X direction in FIG. 5, and the position of the saw chain 22 relative to the main frame 12 can be easily adjusted in the X direction. be able to. At this time, each Hellgear 45b47 in the linkage mechanism
The meshing position of the two is changed, and power transmission between the power transmission mechanism T and the drive wheel 18 is ensured.

Furthermore, by rotating the operating knob 26 using the scale 28 and index 29 shown in FIG.
Through the engagement between the upper worm 25 and the worm wheel portion 23 of the rotating member 19, the rotating member 19, the guide plates 1 to 21, etc. can be rotated in the X direction in FIG. The arrangement position of the saw chain 22 relative to the saw chain 12 can be easily adjusted in the X direction.

Then, after adjusting the placement position of the saw chain 22 by the above operation, if the output shaft 41 of the drive source is rotated, the rotation will be transmitted to the interlocking mechanism C2, the power transmission mechanism T, and each gear of the interlocking mechanism. is transmitted to the drive boiler 18 through the drive coil 18, thereby reliably driving the saw chain 22 around. Therefore, even in a narrow working space S, the chainsaw can be handled safely and reliably without forcing the worker into an unreasonable working posture, and the required cutting work can therefore be reliably performed. Further, since it is used in a narrow working space S, there is no need to downsize the entire chainsaw, and therefore, a decrease in cutting ability due to downsizing can be prevented.

Next, a second embodiment embodying the present invention will be described with reference to FIGS. 10 and 11, focusing on the differences from the first embodiment. Pivot shaft 1 with drive wheel 18 at one end
A worm 51 is provided at the other end of the worm 7, and an operating shaft 53 having a worm wheel 52 that meshes with the worm 51 is rotatably supported on the subframe 13.

A cover 54 is attached to the subframe 13 so as to surround the outer end of the operating shaft 53. An interlocking shaft 55 orthogonal to the operating shaft 53 is disposed within the cover 54 so as to be able to reciprocate and rotate. A pair of rotation transmitting bodies 56 and 57 that can transmit data to the interlocking shaft 55 are mounted so as to be integrally rotatable. Incidentally, as the rotation transmitting bodies 56 and 57, friction discs such as a cylindrical or one conical shape or various gears can be adopted.

A slide piece 58 that engages with the outer surfaces of both rotation transmitting bodies 56 and 57 is attached to the cover 54 so as to be slidable along the axis of the interlocking shaft 55. As shown in the figure, one switching operation position where one rotation transmission body 57 abuts the interlocking shaft 55, the other switching operation position where the other rotation transmission body 57 abuts the interlocking shaft 55, and both rotation transmission bodies 56 and 57 are switched to a neutral position separated from the interlocking shaft 55, and the slide piece 58 is locked and held at each position by a locking means (not shown). Further, inside the cover 54, a spring 60 having a pair of retaining pieces for biasing both rotation transmitting bodies 56, 57 in a direction to separate them from the interlocking shaft 55 is disposed.

Meanwhile, a worm wheel 61 is attached to one end of the second adjustment shaft 32, and a connecting wire 62 is attached to the outer end of the interlocking shaft 55 at its base end. A worm wheel 61 on the second adjustment shaft 32 is attached to the tip of the connecting wire 62.
A worm 63 that meshes with is attached. The respective members 51 to 53, 55 to 57, and 61 to 63 constitute an operating mechanism B2.

Therefore, in this second embodiment, when the slide piece 58 is placed in one of the switching operating positions, one of the rotation transmitting bodies 56, 57 comes into contact with the interlocking shaft 55.

In this state, when the output shaft 41 is rotated and the rotating shaft 17 is rotated accordingly in the same manner as in the first embodiment, the operating shaft 53 is rotated through the engagement between the worm 51 and the worm wheel 52. The interlocking shaft 55 is rotated in a predetermined direction via one of the rotation transmitting bodies 56 and 57 that is in contact with the operating shaft 53. Thereby, the connecting wire 62. The second adjustment shaft 32 is rotated via the worm 63 and the worm wheel 61.

Therefore, in this second embodiment, the same effect as in the first embodiment is achieved, and by rotating the output shaft 41, the arrangement position of the saw chain 22 is automatically changed in the Y direction together with the rotating frame 16. It also has another effect: it can be done.

Next, a third embodiment embodying the present invention will be described with reference to FIG. This embodiment is different from the second embodiment in that the second embodiment is different from the second embodiment. And each of the members 51 to 5
3.55 to 57.62.63 and 71 constitute the actuation mechanism B1.

Therefore, in this third embodiment, the same effects as in the first embodiment are achieved, and the rotating shaft 1 due to the rotation of the output shaft 41 is
7, the actuating shaft 53. of the actuating mechanism B1. Connecting wire 62. The first adjustment shaft 24 can be rotated via the worm 63 and the worm wheel 71, and the position of the saw chain 22 can be automatically adjusted in the X direction (see FIG. 1).

In the fourth embodiment shown in FIGS. 14 to 16, a cylindrical portion 81 is formed as an extension of the zaf frame 13. As shown in FIGS. Cylindrical part 81
Inside, the output shaft 41 of the electric motor is equipped with a centrifugal clutch mechanism 82 that transmits the rotation of the output shaft 41 to the drive gear 42 during high speed rotation, and cuts off power transmission between both 41 and 42 during low speed rotation. has been done.

A rotary shaft 83 perpendicular to the output shaft 41 is rotatably and movably supported in the axial direction within the cylindrical portion 81, and as the rotary shaft 83 moves in the axial direction, A pair of rotation transmitting bodies 8485 is attached to the worm 41a on the output shaft 41 and is detachable from the worm 41a. As the rotation transmitting bodies 84 and 85, the same ones as the rotation transmitting bodies 56 and 57 can be used. Further, an operating lever 86 is rotatably supported on the cylindrical portion 81 .
By selectively arranging the operating portion 86a protruding from the three switching positions, one rotation transmitting body 84 is connected to the spring 85a.
A position where the other rotation transmitting body 85 meshes with the worm 41a against the biasing force of the spring 84a, a position where the other rotation transmitting body 85 engages with the worm 41a against the biasing force of the spring 84a, and a position where both rotational shaft transmitting bodies 84 and 85 engage the worm 41a against the biasing force of the spring 84a. It can be switched to a neutral position where it does not engage with the

A spline shaft portion 83a is formed on the rotation shaft 83, and an intermediate shaft 87 located on the same axis as the rotation shaft 83.
A spline bearing portion 87a that meshes with the spline shaft portion 83a is formed in the spline bearing portion 87a.

On the other hand, the connecting wire 62 connected to the worm 25 includes a transmission shaft portion 88, and a hel gear 88a provided on the transmission shaft portion 88 is meshed with a hel gear 87b of the intermediate shaft 87.

The rotation shaft 832, rotation transmitting bodies 84, 85, connecting wire 62, worm 25, etc. constitute an operating mechanism B3.

Therefore, in this embodiment, by operating the operating lever 86, either one of the rotation transmitting bodies 84 is connected to the operating mechanism B3.
．． When the output shaft 41 is rotated at low speed with the worm 4.85 meshed with the worm 4.12, the rotation shaft 83. intermediate shaft 87
The worm 25 is rotated via the connecting wire 62. Therefore, the saw chain 22 is automatically moved in the X direction.
Section 8Jf1 can be done. At this time, due to the low speed rotation of the output shaft 41, power transmission between the output shaft 41 and the drive gear 42 is interrupted by the centrifugal clutch mechanism 82.

Therefore, the saw chain 22 is not moved around while changing the placement position of the saw chain 22.

Also, by operating the operating lever 86, both rotational shaft transmission bodies 84.
85 is set apart from the worm 41a, the output shaft 4
1 is rotated at high speed, the rotation of the output shaft 41 is transmitted to the drive gear 42 by the action of the centrifugal clutch mechanism 82.
Therefore, the saw chain 22 is moved around.

As shown in FIG. 17, the chainsaw in the fifth embodiment differs from the fourth embodiment in the following points. That is, the heel gear 91 is attached to the end of the second adjustment shaft 32 in the adjustment mechanism A2, and the heel gear 87 of both shafts 87, 32 is installed between the intermediate shaft 87 and the second adjustment shaft 32.
A transmission shaft 92 is rotatably supported, and includes bevel gears 92a and 92b that mesh with gears b and 91, respectively. The rotation shaft 832 rotation transmission bodies 84, 85 . The actuating mechanism B4 is constituted by the transmission shaft 92 and the like.

Therefore, in this embodiment, similarly to the fourth embodiment, the arrangement positions of the rotation transmitting bodies 84, 85 are changed based on the operation of the operating lever 86, and the rotation of the output shaft 41 is lowered depending on each arrangement position. Alternatively, by switching at high speed, the position of the saw chain 22 can be automatically adjusted in the Y direction, and the saw chain 22 can be reliably driven around.

In the sixth embodiment shown in FIG. 18, a small motor 101 as an adjustment drive source is mounted on the outer surface of the subframe 13,
The hevel gear 102a attached to the output shaft 102 is
Hel gear 10 of the first adjustment shaft 24 in the adjustment mechanism AI
It is interlocked with 3. Further, the main frame 12 is provided with a changeover switch 104 for controlling the on/off and rotational direction of the small morph 101.

Therefore, in this embodiment, when the small morph 101 is rotated by operating the changeover switch 104, the saw chain 2
2 can be automatically adjusted in the X direction.

In the seventh embodiment shown in FIG. 19, a small motor 111 as an adjustment drive source is mounted on the outer surface of the subframe 13,
The output shaft 112 also serves as the second adjustment shaft 32 in the second adjustment mechanism A2. Further, the main frame 12 is provided with a changeover switch 113 for controlling the on/off and rotational direction of the small motor 111.

Therefore, in this embodiment, when the small motor 111 is rotated by operating the changeover switch 113, the rotation frame 16 is rotated, and the position of the saw chain 22 can be automatically adjusted in the X direction.

Note that the present invention is not limited to the above embodiments, and the configuration for adjusting the position of the saw chain 22 in the X direction can be modified as described below. That is, (al) As shown in FIG. 13(a), the rotating member 19
A locking lever 72 is rotatably provided on the support plate portion 16a of the rotating frame 16 on one side of the worm wheel portion 23, and the locking lever 72 is provided with a locking protrusion 73, and a locking protrusion 73 is provided on the locking lever 72. A screw-shaped stopper 74 is provided on the support plate part 16a to prevent rotation of the locking lever 72 when the locking lever 73 is engaged with an arbitrary position of the worm wheel part 23.

In this case, remove the stopper 74 and use the locking lever 7.
2 is separated from the worm wheel part 23, the rotating member 19 is rotated to change the arrangement position of the saw chain 22, and in the changed position, the locking protrusion 73 of the locking lever 72 is moved away from the worm wheel part 23. By engaging the stopper 74 and fixing the stopper 74 to the support plate portion 16a, the saw chain 22 can be held at a predetermined position. Moreover, it is also possible to constitute the stopper with a spring.

(bl As shown in FIG. 13(b), the rotating member 19
A plurality of through holes 75 are formed at predetermined intervals on the circumferential edge of the rotating member 19 in a circular arc centered on the rotating shaft 17.
By the rotation operation of the rotation frame 1, any through hole 75 is
By arranging the saw chain 22 so as to face the female screw hole (not shown) on the rotating frame 16, the position of the saw chain 22 can be changed and adjusted. By doing so, the saw chain 22 together with the rotating member 19 is held in a predetermined position.

(C1 As shown in FIG. 13(C), the drive wheel 18
On the outer periphery of the rotating member 19, a large angular recess 77 is provided in the support plate portion 16a of the rotating frame 16, and female screw holes 78 are provided corresponding to each corner of the recess 77. A protrusion 79 having substantially the same shape as the recess 77 and capable of fitting into the recess 77 is provided, and the protrusion 79 and the recess 77
After appropriately changing the fitting position with the rotating member 19 and changing the arrangement position of the saw chain 22 together with the rotating member 19,
Screw the screw 80 inserted into the female screw hole 78,
The rotating member 19 is configured to be fixed to the rotating frame 16.

+dl The rotating member 19 and the support plate portion 16a of the rotating frame 16 are knurled so that they can engage with each other, and the engagement position of the knurled portions of both is changed, so that the rotating member 19 is relative to the rotating frame 16. to change the placement position.

(e) Both side surfaces of the rotating member 19 are knurled to extend radially, and the rotating frame 16 is provided with a pair of operating shafts each having a rotating body that meshes with the knurled portions. The configuration is such that the arrangement position of the rotating member 19 can be changed through the engagement between the rotary body and the knurling part by the rotating operation.

Further, the connecting wire 62 shown in FIGS. 10 and 12 is configured to be detachable from each worm 63, and can be selectively connected to the worm 63 shown in both figures.
In addition to the electric motor, it is also possible to use a small gasoline engine or the like as the drive source.

〔Effect of the invention〕

As described in detail above, this invention does not reduce the cutting ability of the chainsaw, even in a narrow working space.
It can be easily handled and has the excellent effect of reducing the burden on the operator.

[Brief explanation of the drawing]

1 to 9 show a first embodiment of a chainsaw embodying the present invention, in which FIG. 1 is a plan view, and FIG.
The figure is a plan view showing the disassembled state of the main frame and subframe, Figure 3(a) is a side view of the main frame, Figure 3(b) is a side view of the subframe, and Figure 4 is the subframe with the cover removed. A plan view of the frame, FIG. 5 is a front view of the chainsaw, FIG. 6 is a partially cutaway front view of the chainsaw, FIG. 7 is also a plan view, FIG. 8 is a partially exploded perspective view, and FIG. 9 (a), (b), and (c) are explanatory diagrams showing how the chainsaw is used. 10 and 11 show a chainsaw according to the second embodiment, in which FIG. 10 is a partially cutaway front view, and FIG. 11 is a front view showing the internal mechanism of the subframe. . FIG. 12 is a partially cutaway front view of a chainsaw according to a third embodiment. FIGS. 13(a), 13(b), and 13(C) are partial plan views showing other examples of the adjustment mechanism. 14 to 16 show a chainsaw according to the fourth embodiment, in which FIG. 14 is a partially cutaway front view, FIG. 15 is a partial plan view, and FIG. 16 is a partial sectional view. It is. FIG. 17 is a front view of the chainsaw in the fifth embodiment;
FIG. 18 is a plan view of the chainsaw in the sixth embodiment;
FIG. 19 is a front view of the chainsaw in the seventh embodiment. FIG. 20 is an explanatory diagram showing how a conventional chainsaw is used. 11... Main frame, 12... Main frame,
13... Subframe, 16... Rotating frame, 1
8... Drive wheel, 19... Rotating member, 21...
- Guide plate as a guide member, 41... Output shaft, 42... Drive gear, 43... Transmission shaft as input shaft, 101.111... Small motor as adjustment drive source, T... - Power transmission mechanism, Al, A2...adjustment mechanism, BIB2. B3. B4... Operating mechanism, C... Interlocking mechanism, D... Interlocking mechanism. Patent applicant Sugihara Rinki Co., Ltd. Agent
Patent Attorney On 1) Hironobu (= ``N dāiω ≧

Claims (1)

[Claims] 1. An endless saw chain (22) that can revolve around a guide member (21), and a drive wheel (18) that is rotated by a drive source and meshes with the saw chain (22). ) and a power transmission mechanism (T) that transmits the rotation of the drive source to the drive wheel (18).
In the chainsaw mounted on the chain saw, there is provided between the guide member (21) and the main body frame (11) for rotationally adjusting the arrangement position of the saw chain (22) about the rotation axis of the drive wheel (18). A chainsaw characterized by being provided with an adjustment mechanism (A1). 2 Between the adjustment mechanism (A1) and the power transmission mechanism (T), the adjustment mechanism (A1
2. The chainsaw according to claim 1, further comprising an operating mechanism (B1) for automatically operating the chain saw. 3 Between the adjustment mechanism (A1) and the output shaft (41) of the drive source, the adjustment mechanism (A1) is connected as the output shaft (41) rotates.
2. The chainsaw according to claim 1, further comprising an operating mechanism (B3) for automatically operating the chain saw. 4 The adjustment mechanism (A1) has a dedicated adjustment drive source (10
The chainsaw according to claim 1, characterized in that: 1) are connected to each other. 5. An endless saw chain (22) that can revolve around the guide member (21), a drive wheel (18) that is rotated by a drive source and meshes with the saw chain (22), and A power transmission mechanism (T) that transmits rotation to the drive wheel (18) is connected to the main body frame (11).
In the chainsaw attached to the main frame (11), the main frame (12) supports the drive source, and the subframe (13) supports the power transmission mechanism (T) and saw chain (22).
and a sub-frame (13) is connected to the main frame (12) so as to be rotatably adjustable around the output shaft (41) of the drive source, and and the input shaft (43) of the power transmission mechanism (T)
There are two shafts (41, 43) between the main frame (12) and the subframe (13), regardless of the connection position of the
A chainsaw characterized by being provided with an interlocking mechanism (C) that ensures power transmission between the chainsaw. 6. An endless saw chain (22) that can revolve around the guide member (21), a drive wheel (18) that is rotated by a drive source and meshes with the saw chain (22), and A power transmission mechanism (T) that transmits rotation to the drive wheel (18) is connected to the main body frame (11).
A chainsaw mounted on a chain saw is provided with a rotating frame (16) that supports the saw chain (22) and the drive wheel (18), and the rotating frame (16) is arranged to intersect the rotational axis of the drive wheel (18). An adjustment mechanism (A2) is provided between the rotation frame (16) and the main body frame (11) to allow rotation adjustment of the arrangement position of the rotation frame (16). In addition, a linkage mechanism is provided between the drive wheel (18) and the power transmission mechanism (T) to ensure power transmission between the two regardless of the adjusted position of the rotating frame (16) with respect to the main body frame (11). A chainsaw characterized by having (D). 7 Between the adjustment mechanism (A2) and the power transmission mechanism (T), the adjustment mechanism (A2
7. The chainsaw according to claim 6, further comprising an operating mechanism (B2) for automatically operating the chain saw. 8 An adjustment mechanism (A2) is provided between the adjustment mechanism (A2) and the output shaft (41) of the drive source as the output shaft (41) rotates.
7. The chainsaw according to claim 6, further comprising an operating mechanism (B4) for automatically operating the chain saw. 9 The adjustment mechanism (A2) has a dedicated adjustment drive source (11
7. The chainsaw according to claim 6, characterized in that: 1) are connected to each other.