JP2015126713A - Work tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working tool in which a direction of a blade part of a saw blade can be changed and which is therefore excellent in work efficiency.SOLUTION: The work tool comprises: a driving source; a drive shaft whose one end part is connected to the driving source and which is driven to rotate by the driving force of the driving source; a housing covering the other end part of the drive shaft; a reciprocating motion converting mechanism which is provided inside the housing and converts rotation of the drive shaft into reciprocating motion; an output shaft which is connected to the reciprocating motion converting mechanism and which is driven to make reciprocating motion by the reciprocating motion converting mechanism and can fix a saw blade having a blade part; a base which is provided in a front part of the housing and extends in a direction crossing a direction of the reciprocating motion of the output shaft; a long operation rod which is connected to the driving source on one end side, supports the housing on the other end side, and in which the drive shaft is arranged; and blade direction changing means for changing a facing direction of the blade part.

Description

  The present invention relates to a work tool, and more particularly to a work tool for cutting a branch or the like located at a height of a standing tree.

  2. Description of the Related Art Conventionally, in a work tool for cutting a branch located at a high position of a standing tree such as a garden tree or a roadside tree, for example, as shown in FIGS. 13 and 14, a long operation provided with a grip 501A and a handle 501B. There is known a pole saw 500 mainly including a rod 501, an engine 502 provided on one end side of the operation rod 501, and a gear case 503 provided on the other end side of the operation rod 501 (Patent Document 1). . The pole saw 500 transmits the driving force of the engine 502 to the gears in the gear case 503 through a shaft disposed in the operation rod 501, and the saw chain 504 attached as a tip tool to the gear case 503 is driven in a circular manner so that a high place is obtained. The material to be cut W, such as a branch located at, is cut. Further, the user uses the pole saw 500 by putting the band attached to the pole saw 500 on the shoulder, holding the grip 501A with one hand, and holding the handle 501B with the other hand.

JP-T-2006-523102

  However, in the above-described pole saw 500, the cutting is performed by the circular drive of the saw chain 504. Therefore, in the state where the branch to be cut is cut, the branches other than the cutting target that are located on the opposite side of the cutting target branch with respect to the saw chain 504 Etc. may be cut by mistake, and it is difficult to cut only the branches to be cut at locations where branch trees are dense. For this reason, the user is required to carefully operate the pole saw 500, which is a burden on the work. In addition, depending on the direction in which the branch to be cut extends, the cutting direction may have to be changed. In order to change the cutting direction, the user holds the handle 501B while holding the grip 501A with one hand. The pole saw 500 as a whole is tilted with only one hand to change the direction in which the blade of the saw chain 504 faces. However, in order to tilt the pole saw 500 with only one hand, considerable force is required, so the cutting direction The change was a burden on the user.

  Therefore, an object of the present invention is to provide a work tool that suppresses accidental cutting of branches other than the cutting target and that can change the direction in which the blade portion of the tip tool faces.

  In order to solve the above-described problems, the present invention provides a drive source, a drive shaft having one end connected to the drive source, which is rotationally driven by the drive force of the drive source, and a housing that covers the other end of the drive shaft. A body, a reciprocating motion conversion mechanism for converting the rotation of the drive shaft into a reciprocating motion, connected to the reciprocating motion converting mechanism, and reciprocatingly driven by the reciprocating motion converting mechanism, and having a blade portion. An output shaft capable of fixing a saw blade, a base provided in front of the housing and extending in a direction crossing the reciprocating direction of the output shaft, connected to the drive source on one end side, and the housing on the other end side And a long operating rod in which the drive shaft is disposed, and a blade direction changing means for changing the direction in which the blade faces the work tool. .

  According to such a configuration, since a single-edged saw blade can be attached to the output shaft as a tip tool, it is possible to suppress erroneously cutting branches other than the cutting target. Moreover, since the direction in which the blade portion of the saw blade faces can be changed, the cutting direction can be changed without tilting the entire work tool. For this reason, the burden on the user's work can be reduced, and the work accuracy and work efficiency can be improved.

  In the above configuration, the blade direction changing means is provided so as to connect the casing and the other end side of the operating rod, and changes the angle formed by the axis of the output shaft and the axis of the operating rod. Thus, it is preferable to include angle changing means for changing the direction in which the blade faces.

  According to such a configuration, the angle formed by the shaft center of the output shaft and the shaft center of the operation rod can be changed, so the direction of the saw blade portion fixedly attached to the output shaft and the operation rod It is possible to change the angle formed with the axis of the. For this reason, when the direction of the front side as viewed from the user who is working is changed so that the blade faces, the cutting is performed using the weight of the entire work tool when cutting a branch or the like to be cut from above. It is possible to improve convenience and workability.

  The angle changing means includes a base connected to the other end of the operating rod, an arm connected to the housing and rotatably supported by the base, and the arm connected to the base. It is preferable to have a rotation angle fixing means for fixing the arm portion to the base at a plurality of rotation angle positions rotated relative to the base portion.

  According to such a configuration, since the casing can be rotated with respect to the base, the angle between the axis of the output shaft provided in the casing and the axis of the operating rod can be changed.

  Further, the drive shaft preferably has a portion configured to be able to transmit a rotational force to the reciprocating motion conversion mechanism even when the drive shaft is bent.

  According to such a configuration, when the angle between the shaft center of the output shaft and the shaft center of the operating rod is changed, and the direction in which the blade faces is changed, the rotational force is surely applied to the output shaft even if the drive shaft is bent. Can be communicated to.

  Further, the blade direction changing means is configured such that the blade faces the blade portion by allowing the rod to be fixed to the operation rod at a plurality of rotation angle positions where the rod is rotated around the axis of the operation rod. It is preferable to provide a rotation angle changing means for changing.

  According to such a configuration, the direction in which the blade faces can be changed by rotating the housing around the axis of the operating rod, so the direction in which the blade faces as viewed from the user who is working is directed to the right , Left direction, up direction, etc. For this reason, the branch etc. which are to-be-cut materials which can be cut | disconnected only from a fixed direction can be cut | disconnected, and the convenience and workability | operativity can be improved more.

  The operating rod is formed with a collar-side fixing hole, and the rotation angle changing means is connected to the casing and can be connected to the operating rod and has a cylinder-side fixing hole formed therein. A rotation angle fixing member that fixes the operating rod and the cylinder part to each other by inserting the collar side fixing hole and the cylinder side fixing hole in a state where the collar is connected to the cylinder part. It is preferable that a plurality of either the flange-side fixing hole or the cylinder-side fixing hole is formed side by side in the circumferential direction.

  According to such a configuration, the operating rod and the cylinder portion are relatively rotated around the axis of the operating rod, and the rotation angle fixing member is used at a rotation angle position where the rod-side fixing hole and the cylinder-side fixing hole face each other. The operation rod and the casing can be fixed to each other.

  Further, the operation rod is configured by a first rod disposed on the housing side and a second rod disposed on the drive source side, and the rotation angle changing means includes the first rod and the first rod. A hook connecting tube provided on one of the two hooks, and a rotation angle fixing member for fixing the connection between the hook connecting cylinder and the other of the first hook or the second hook, A cylinder-side fixing hole is formed in the flange connecting cylinder portion, and a flange-side fixing hole is formed in either the first flange or the second flange, and the tube-side fixing hole and the flange-side fixing hole It is preferable that any one of them is formed side by side in the circumferential direction, and the rotation angle fixing member is provided so as to be able to penetrate the cylinder side fixing hole and the flange side fixing hole.

  According to such a configuration, either the first rod or the second rod and the rod connecting tube portion are relatively rotated, and the rotation angle is at the rotation angle position where the tube side fixing hole and the rod side fixing hole face each other. Either the first rod or the second rod and the rod connecting tube portion can be fixed to each other by the fixing member. Further, rotation angle changing means can be provided at an intermediate position of the operation rod. For this reason, the rotation angle changing means for rotating the housing is close to the operation position of the user's work tool, and convenience can be improved. Further, when there is another work tool having the same configuration from the rotation angle changing means to the drive source but having a different configuration from the rotation angle changing means to the housing, the rotation angle change means to the drive source are compatible. Therefore, the manufacturing cost can be reduced.

  Moreover, it is preferable that the grip part for a user to hold | grip is provided in this 1st collar.

  According to such a configuration, when the casing is rotated around the axis of the operation rod in order to change the direction in which the blade faces, the user can easily hold the casing and rotate the casing. The body can be rotated, the burden on the user's work is further reduced, and convenience and workability can be further improved.

  Moreover, it is preferable that the 2nd bar is provided with the holding part for a user to hold.

  According to such a configuration, when the casing is rotated, the grip portion does not rotate together with the casing, so that the direction in which the blade portion faces can be changed while maintaining operability.

  According to the work tool of the present invention, it is possible to provide a work tool that reduces the work burden on the user and improves the work accuracy and work efficiency.

It is a side view which shows the whole external appearance of the working tool by the 1st Embodiment of this invention. It is a partial cross section side view which shows the inside of the gear housing of the working tool by the 1st Embodiment of this invention. It is a side view which shows the external appearance of the gear housing and rotation angle change mechanism of the working tool by the 1st Embodiment of this invention. It is IV-IV sectional drawing which shows the rotation angle change mechanism of the working tool by the 1st Embodiment of this invention. It is a side view which shows the whole external appearance of the working tool by the 2nd Embodiment of this invention. It is VI-VI sectional drawing which shows the rotation angle change mechanism of the working tool by the 2nd Embodiment of this invention. It is a side view which shows the whole external appearance of the state in which the direction which a blade part faces is changed upward by the rotation angle change mechanism of the working tool by the 2nd Embodiment of this invention. It is a side view which shows the whole external appearance of the working tool by the 3rd Embodiment of this invention. It is a side view which shows the whole external appearance of the working tool by the 4th Embodiment of this invention. It is a side view which shows the angle change mechanism of the working tool by the 4th Embodiment of this invention. It is XI-XI sectional drawing which shows the angle change mechanism of the working tool by the 4th Embodiment of this invention. It is a side view which shows the whole external appearance of the state which the angle which the shaft center of a plunger and the shaft center of an operating rod changed by the angle change mechanism of the working tool by the 4th Embodiment of this invention. It is a side view which shows the whole external appearance of the conventional work tool. It is a figure which shows the use condition of the conventional work tool.

  A working tool according to an embodiment of the present invention will be described with reference to FIGS.

  First, a working tool according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, a pole saver saw 1 as a work tool according to the first embodiment of the present invention includes an internal combustion engine 2, an operating rod 3 having a handle 33, a rotation angle changing mechanism 4, and the like. The gear housing 5, the reciprocating motion conversion mechanism 6, the plunger 7, and the blade holder 8 are mainly configured, and the plunger 9 is used with the blade 9 attached thereto via the blade holder 8. In the following description, the direction in which the operating rod 3 extends from the internal combustion engine 2 in FIG. 1 is defined as the front direction, and the reverse direction is defined as the rear direction. The direction in which the handle 33 extends with respect to the operating rod 3 is defined as the upward direction, and the reverse direction is defined as the downward direction. Furthermore, the right when the pole saver saw 1 is viewed from the rear is defined as the right direction, and the reverse direction is defined as the left direction.

  The internal combustion engine 2 mainly includes a crankshaft (not shown), a centrifugal clutch (not shown), a fuel tank 21, and a starter handle 22, and has components necessary for driving the internal combustion engine 2. . The internal combustion engine 2 corresponds to a drive source. A crankshaft (not shown) is crank-driven when the internal combustion engine 2 is driven. A centrifugal clutch (not shown) is connected to a crankshaft (not shown), and when a rotation speed of the crankshaft (not shown) exceeds a predetermined rotation speed, a clutch drum (not shown) and a clutch (not shown) inside the centrifugal clutch. The weight is connected.

  The fuel tank 21 is provided in the lower part of the internal combustion engine 2, and contains fuel for driving the internal combustion engine 2. The starter handle 22 is provided on the left side of the rear end portion of the internal combustion engine 2.

  The operating rod 3 is a long cylindrical member extending in the front-rear direction, and supports the gear housing 5 at the front end portion via the rotation angle changing mechanism 4, and is connected to the front portion of the internal combustion engine 2 at the rear end portion. Connected so that relative rotation is impossible. The operation rod 3 includes a grip 31, a hanger 32, and a handle 33, and has fixed holes 3a, 3b, 3c, and 3d, and a drive shaft 34 shown in FIG. Has been. The length of the operation rod 3 in the front-rear direction is designed to be about 1 to 4 m.

  The grip 31 is a portion that is held by the user, and is provided at the rear portion of the operation rod 3. The grip 31 includes a throttle 31A and a stop switch 31B.

  The throttle 31A is provided on the lower side of the grip 31, and can adjust the fuel injection amount by changing the amount pushed upward. The stop switch 31B is a switch that is connected between, for example, an ignition plug and a power generator and can be switched between an operation position and a stop position. The internal combustion engine is pulled by switching the stop switch 31B to the operation position and pulling the starter handle 22. 2 can be driven. Further, the internal combustion engine 2 can be stopped by switching the stop switch 31B to the stop position while the internal combustion engine 2 is being driven.

  The hanger 32 is a part to which a shoulder band (not shown) is attached, and is provided in front of the grip 31. In a state where the shoulder band is attached to the hanger 32, the user uses the pole saver saw 1 by placing the shoulder band on the shoulder.

  The handle 33 is a so-called loop handle that is provided in front of the hanger 32 and has a ring shape when viewed from the front, and includes a handle portion 33A and a connection portion 33B. The handle portion 33 </ b> A is a portion that is gripped by a hand opposite to the hand that grips the grip 31, has a bar shape extending in the left-right direction, and is positioned above the operation rod 3. The connecting portion 33B connects the left and right end portions of the handle portion 33A and both side surfaces of the operating rod 3 respectively. The user uses the pole saver saw 1 while holding the shoulder band on the shoulder, holding the grip 31 with one hand, and holding the approximate center in the left-right direction of the handle portion 33A with the other hand. Since the approximate center of the handle 33A and the grip 31 held by the user are located on the axis of the operation rod 3 in a top view, stable operability is ensured. The handle 33 corresponds to a grip part.

  As shown in FIG. 2, the drive shaft 34 is a shaft extending from the gear housing 5 to the internal combustion engine 2 through the inside of the operation rod 3 in the front-rear direction, and the rear end portion is connected to a centrifugal clutch in the internal combustion engine 2. The front end portion is connected to the reciprocating motion conversion mechanism 6. The drive shaft 34 is rotatably supported by a ball bearing 5A in the gear housing 5, a ball bearing (not shown) in the operation rod 3, and a ball bearing (not shown) in the internal combustion engine 2. A pinion 34A is provided at the front end.

  As shown in FIGS. 3 and 4, the fixing holes 3 a, 3 b, 3 c, and 3 d are substantially circular holes that penetrate from the outside of the operation rod 3 to the inside at the front end portion of the operation rod 3. Are formed at regular intervals in the circumferential direction. Specifically, the fixing hole 3a penetrates upward from the inside of the operating rod 3, the fixing hole 3b penetrates from the inside of the operating rod 3 to the right, and the fixing hole 3c extends downward from the inside of the operating rod 3. The fixing hole 3d penetrates from the inside of the operation rod 3 to the left. The fixing holes 3a to 3d correspond to the heel side fixing holes.

  The rotation angle changing mechanism 4 includes a connecting cylinder portion 41, a pin support portion 42, a fixing pin 43, a spring 44, and fixing holes 3 a to 3 d of the operating rod 3. 3 is a mechanism for fixing the gear housing 5 to the operating rod 3 at a plurality of rotation angle positions rotated about the axis 3. The rotation angle changing mechanism 4 corresponds to a rotation angle changing unit and a blade direction changing unit.

  The connecting cylinder portion 41 is a cylindrical member extending in the front-rear direction, and is connected to the gear housing 5 so as not to move relative to the gear housing 5 at the front end, and its inner diameter is slightly smaller than the outer diameter of the operation rod 3. The front end portion of the operation rod 3 is inserted into the inside. The connecting tube portion 41 is formed with a first pin insertion hole 41a, a slit (not shown), and a tightening screw hole 41b. The connecting cylinder part 41 corresponds to a cylinder part.

  The first pin insertion hole 41a is a substantially circular hole in a top view penetrating in the vertical direction from the outside to the inside of the connection tube portion 41, and is formed at the upper portion of the connection tube portion 41 at the substantially center in the front-rear direction. The fixing holes 3a to 3d are configured to have substantially the same diameter. The slit (not shown) penetrates from the lower side to the inner side of the connecting cylinder part 41 and is formed in a predetermined length forward from the rear end surface of the connecting cylinder part 41. By forming a slit (not shown), the lower side of the rear portion of the connecting tube portion 41 is divided into left and right. The first pin insertion hole 41a corresponds to a cylinder side fixing hole.

  The tightening screw hole 41b is a hole penetrating the lower side of the rear part of the connecting cylinder part 41 divided in left and right by a slit (not shown) in the left and right direction, and below the rear part of the connecting cylinder part 41 into which the fastening screw 41A is divided. Screwed through the right and left sides of the side. In the state where the operating rod 3 is inserted inside the connection cylinder part 41, the width of the slit (not shown) in the left-right direction is shortened by tightening the fastening screw 41A, and at the same time, the inner diameter of the connection cylinder part 41 is also reduced. 41 is fixed to the operation rod 3.

  The pin support portion 42 includes a contact portion 42A and a support portion 42B. The abutting portion 42 </ b> A is a member extending in the front-rear direction, and a support portion 42 </ b> B extends downward from each of the front end portion and the rear end portion, and is connected to the connection cylinder portion 41. A second pin insertion hole 42a penetrating in the vertical direction is formed substantially at the center in the front-rear direction of the contact portion 42A. The second pin insertion hole 42a and the first pin insertion hole 41a have a substantially coincident positional relationship when viewed from above.

  The fixing pin 43 includes a cylindrical portion 43A, a knob portion 43B, and a retaining ring 43C. The cylindrical portion 43A is a substantially cylindrical member extending in the vertical direction, and is inserted through the second pin insertion hole 42a, the first pin insertion hole 41a, and the fixing hole 3a. Since the cylindrical portion 43A inserted through the second pin insertion hole 42a and the first pin insertion hole 41a is further inserted into the fixing hole 3a, the rotational movement and the front-rear movement of the connecting cylinder portion 41 with respect to the operating rod 3 are restricted. ing. The knob portion 43B is an enlarged diameter portion provided at the upper end portion of the cylindrical portion 43A. The retaining ring 43C is a portion whose diameter is larger than that of the first pin insertion hole 41a, and the cylindrical portion 43A is the second pin insertion hole 42a, the first pin insertion hole 41a, and the fixing hole for the operation rod 3. It is provided at a position where it abuts against the upper surface of the connecting tube portion 41 in a state where it passes through 3a. The fixing pin 43 corresponds to a rotation angle fixing member.

  The spring 44 is an urging member fitted to the cylindrical portion 43A of the fixed pin 43, and has an upper end portion that contacts the lower side of the contact portion 42A of the pin support portion 42 and a lower end portion that contacts the retaining ring 43C. It touches. The spring 44 biases the retaining ring 43C downward to bias the entire fixing pin 43 downward. Thus, since the spring 44 urges the fixing pin 43 downward, the cylindrical portion 43A of the fixing pin 43 is inserted into the second pin insertion hole 42a, the first pin insertion hole 41a, and the fixing hole 3a. Is held.

  A base 5F for attaching and stabilizing the pole saver saw 1 body against the material to be cut at the time of cutting work is attached to the front end side which is in front of the gear housing 5, and the base 5F is attached to the material to be cut at the time of cutting work. The pole saver saw 1 can be stabilized by working while pressing. That is, in the cutting work by the pole saver saw 1, a cutting reaction force is generated in the reciprocating direction of the blade 9. Therefore, by pressing the base 5F extending in a direction substantially perpendicular to the reciprocating direction of the blade 9 against the material to be cut, the positions of the material to be cut and the blade 9 are kept constant, and the reciprocating direction of the blade 9 Workability is improved by receiving the cutting reaction force generated in

  The gear housing 5 is located at the front portion of the operating rod 3 and is supported by the operating rod 3 via a rotation angle changing mechanism 4, and a reciprocating conversion mechanism 6 and a plunger 7 are mainly accommodated therein. . The gear housing 5 corresponds to a housing.

  The reciprocating motion conversion mechanism 6 is disposed in the lower part inside the gear housing 5 and includes a drive transmission shaft 61 and a reciprocating plate 62.

  The drive transmission shaft 61 extends in the front-rear direction substantially parallel to the drive shaft 34, and is positioned in front of and below the drive shaft 34, and is rotatably supported by the ball bearing 5B supported by the gear housing 5 and the ball bearing 5C. Has been. The drive transmission shaft 61 includes a drive transmission gear 61A and an inclined shaft 61B.

  The drive transmission gear 61 </ b> A is coaxially fixed to the rear part of the drive transmission shaft 61 and meshes with the pinion 34 </ b> A of the drive shaft 34. The rotational force of the drive shaft 34 is transmitted to the drive transmission shaft 61 via the pinion 34A and the drive transmission gear 61A.

  The inclined shaft 61B is provided on the drive transmission shaft 61 in a state where the axis of the inclined shaft 61B is inclined with respect to the axis of the drive transmission shaft 61. The inclined shaft 61B is configured to rotate with the drive transmission shaft 61 around the axis of the drive transmission shaft 61.

  The reciprocating plate 62 is rotatably attached to the inclined shaft 61B about the axis of the inclined shaft 61B via two ball bearings 6A that are in contact with the inclined shaft 61B. A swing arm 62A extending in a perpendicular direction is provided. The tip of the swing arm 62A is connected to the plunger 7.

  The plunger 7 has a substantially cylindrical shape extending in the front-rear direction, is located in front of and above the drive shaft 34, and has a substantially parallel positional relationship with the drive shaft 34. The plunger 7 is supported on the gear housing 5 through a metal bearing 5D so as to be reciprocally slidable in the front-rear direction. Further, the plunger 7 is formed with an insertion hole 7 a and a blade attachment portion 71. The plunger 7 corresponds to an output shaft.

  The insertion hole 7 a is formed in a substantially circular shape when viewed from the bottom on the lower rear side of the plunger 7, and a part of the swing arm portion 62 </ b> A of the reciprocating plate 62 is inserted therethrough. In a state where a part of the swing arm part 62A is inserted, the tip end of the swing arm part 52A is rotatably connected to the plunger 7 by a connector pin 7A penetrating the rear part of the plunger 7 left and right.

  The blade attachment portion 71 is formed at the front end portion of the plunger 7, and a slit (not shown) is formed. The slit (not shown) is a hole penetrating in the vertical direction extending rearward from the front end portion of the blade mounting portion 71 and is configured such that the rear portion of the blade 9 can be inserted.

  A blade 9 corresponding to a saw blade attached to the plunger 7 extends in the front-rear direction and includes a blade portion 9A for cutting a material to be cut at a front lower end portion. The blade 9 has a thickness of about 0.9 to 1.6 mm, and a locking hole (not shown) penetrating in the left-right direction is formed in the rear part.

  The blade holder 8 is fixed to the blade attachment portion 71 by a fastening member 8A, and mainly includes a knob 81, a holder case 82, and a locking pin (not shown). The knob 81 is a member for releasing the fixing of the blade 9 with respect to the plunger 7, and by pressing the knob 81 downward, the fixing of the blade 9 fixed to the plunger 7 can be released.

  The holder case 82 is formed so as to cover the entire blade mounting portion 71, and a portion facing a slit (not shown) is opened in the vertical direction. When attaching the blade 9, the rear portion of the blade 9 is inserted into a slit (not shown) of the blade attachment portion 71, and the knob 82 returns to its original state by releasing the hand from the knob 81. Is inserted into a not-shown locking hole of the blade 9, and the blade 9 is fixed to the plunger 7.

  In this way, since the cutting operation can be performed by attaching the single-blade blade 9 having the blade portion formed only at the lower end portion to the plunger 7, it is possible to suppress erroneous cutting of materials other than the material to be cut. .

  Here, a direction in which the blade portion 9A of the blade 9 faces when the gear housing 5 is fixed at a rotation angle position rotated by a predetermined angle about the axis of the operating rod 3 by the rotation angle changing mechanism 4 will be described. The operation direction of the rotation angle changing mechanism 4 will also be described. The arrow A shown in FIGS. 1 to 3 represents the direction in which the blade portion 9A faces, the straight line B represents the axis of the plunger 7, and the straight line C represents the axis of the operating rod 3.

  The direction (arrow A) facing the blade portion 9A of the blade 9 is a direction substantially orthogonal to the axis (straight line B) of the plunger 7 and the axis (straight line C) of the operation rod 3, and cuts the workpiece. In this case, the direction in which the user moves the blade portion 9A is referred to as the cutting direction. 1 to 3, the direction in which the blade portion 9A faces is the downward direction.

  When it is desired to change the direction (arrow A) facing the blade portion 9A of the blade 9, from the state shown in FIGS. 3 and 4, that is, the gear housing 5 and the connecting cylinder portion 41 are fixed to the operating rod 3. By loosening the fastening screw 41A and moving the fixing pin 43 upward against the urging force of the spring 44, the fixing pin 43 comes out of the fixing hole 3a of the operating rod 3, and the gear housing 5 and the connection to the operating rod 3 are connected. The fixing of the cylinder part 41 is released.

  In a state in which the gear housing 5 and the connecting cylinder portion 41 are fixed to the operating rod 3, the gear housing 5 and the connecting cylinder portion 41 are rotated around the axis (straight line C) of the operating rod 3, The hand is released from the fixing pin 43 at a position where any one of the fixing holes 3b to 3d and the first pin insertion hole 41a face each other. By releasing the hand from the fixing pin 43, the fixing pin 43 is inserted into the fixing hole of the operating rod 3 facing the first pin insertion hole 41a by the urging force of the spring 44. Thereafter, the gear housing 5 and the connecting cylinder portion 41 are fixed to the operation rod 3 by tightening the fastening screw 41A.

  Specifically, when the direction in which the blade portion 9A faces is the left direction in FIG. 3, the fixing is released from the state of FIGS. 3 and 4, and the gear housing 5 and the connecting tube portion 41 are rotated 90 ° clockwise. The hand is released from the fixing pin 43 at a rotation angle position where the first pin insertion hole 41a and the fixing hole 3b of the operating rod 3 are opposed to each other, and the fastening screw 41A is tightened to the gear housing 5 and the operating rod 3 The connection cylinder part 41 is fixed. To make the direction in which the blade portion 9A faces the upper direction in FIG. 3, the first pin insertion hole 41a is the rotation angle position where the first pin insertion hole 41a and the fixing hole 3c face each other and to the right direction. And the gear housing 5 and the connecting cylinder part 41 are fixed to the operating rod 3 at the rotation angle position where the fixing hole 3d faces each other.

  Thus, since the gear housing 5 can be fixed to the operation rod 3 at a plurality of rotation angle positions rotated about the axis of the operation rod 3, the entire pole saver saw 1 is tilted or rotated. Therefore, since the direction in which the blade portion 9A faces can be changed, the work burden on the user can be reduced, and the work efficiency can be improved.

  Next, the operation of the pole saver saw 1 will be described.

  When the stop switch 31B described above is switched from the stop position to the operating position and the starter handle is pulled, the internal combustion engine 2 starts to be driven, and a rotation shaft (not shown) provided in the internal combustion engine 2 rotates. Next, when the throttle 31A is pushed upward, the rotational speed of a rotary shaft (not shown) increases, and when the rotational speed exceeds a predetermined rotational speed, rotational force is transmitted to the drive shaft 34 via a centrifugal clutch (not shown). The

  When the drive shaft 34 rotates, the drive transmission shaft 61 is rotationally driven via the pinion 34A and the drive transmission gear 61A, and the inclined shaft 61B rotates around the axis of the drive transmission shaft 61.

  When the inclined shaft 61B rotates about the axis of the drive transmission shaft 61, the reciprocating plate 62 swings back and forth to reciprocate, and the plunger 7 and the plunger 7 connected to the swing arm portion 62A The attached blade 9 is also reciprocated in the front-rear direction. The blade 9 is driven to reciprocate so that the cutting operation can be performed.

  Next, a pole saver saw 200 according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structure same as the pole saver saw 1 by the 1st Embodiment of this invention, description is abbreviate | omitted, and a different structure is demonstrated.

  The pole saver saw 200 includes an operating rod 203 and a rotation angle changing mechanism 204.

  The operating rod 203 includes a first rod 203A and a second rod 203B, and the first rod 203A and the second rod 203B are connected by a rotation angle changing mechanism 204.

  The first rod 203A is a cylindrical member extending in the front-rear direction, and is configured to support the gear housing 5 and be connectable to the rotation angle changing mechanism 204. The front end portion of the first rod 203A is connected to the gear housing 5 so as not to rotate relative to the gear housing 5 and supports the gear housing 5. A rear end portion of the first rod 203A is inserted into the rotation angle changing mechanism 204, and fixed holes 3a to 3d are formed. As shown in FIG. 6, the fixing holes 3 a to 3 d are formed at regular intervals in the circumferential direction at the rear end portion of the first rod 203.

  The second rod 203B is a cylindrical member extending in the front-rear direction, and is provided with a grip 31, a hanger 32, and a handle 33. The front end portion of the second rod 203B is connected to the rotation angle changing mechanism 204 so as not to be relatively rotatable, and the rear end portion of the second rod 203B is connected to the front portion of the internal combustion engine 2 so as not to be relatively rotatable.

  As shown in FIGS. 5 and 6, the rotation angle changing mechanism 204 includes a connecting cylinder portion 241, a pin support portion 42, a fixing pin 43, a spring 44, and fixing holes 3 a to 3 d of the first rod 203 </ b> A. It is configured. The connecting cylinder portion 241 is a cylindrical member extending in the front-rear direction, and the rear end portion thereof is connected to the second flange 203B so as not to be relatively rotatable. The front portion includes a pin support portion 42, a fixing pin 43, and the like. , A spring 44 is provided. The rotation angle changing mechanism 204 corresponds to a rotation angle changing means and a blade direction changing means, and the connecting tube portion 241 corresponds to a saddle connecting tube portion.

  As shown in FIG. 7, when the direction in which the blade portion 9 </ b> A faces is an upward direction, the fixing pin 43 is moved upward from the state of FIGS. 5 and 6 to fix the first rod 203 </ b> A and the connecting cylinder portion 241. The gear housing 5 and the first rod 203A are rotated 180 ° clockwise, and the hand is moved from the fixing pin 43 at a rotation angle position where the first pin insertion hole 41a and the fixing hole 3c of the first rod 203A are opposed to each other. Then, the fastening screw 41A is tightened to fix the gear housing 5 and the first rod 203A to the second rod 203B. In order to make the direction in which the blade portion 9A faces the right direction, the gear housing 5 and the first rod 203A are moved with respect to the second rod 203B at a rotation angle position where the first pin insertion hole 41a and the fixing hole 3d are opposed to each other. Fix it. Further, in order to set the direction in which the blade portion 9A faces to the left, the gear housing 5 and the first rod 203A are moved to the second rod 203B at a rotation angle position where the first pin insertion hole 41a and the fixing hole 3b are opposed to each other. Fix against.

  Thus, since the rotation angle changing mechanism 204 is provided in the operating rod 203, when changing the direction in which the blade portion 9A faces, the user can change the direction in which the blade portion 9A faces without moving to the vicinity of the gear housing 5. Since it can be changed, convenience is improved. Further, by making the rotation angle changing mechanism 204 compatible with the rotation angle changing mechanism of other work tools such as a joint type brush cutter, the drive source side can be made the same configuration as the rotation angle changing mechanism. The manufacturing cost can be reduced.

  Next, a pole saver saw 300 according to a third embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same structure as the pole saver saw 1 by the 1st Embodiment of this invention, or the pole saver saw 200 by the 2nd Embodiment of this invention, description is abbreviate | omitted and it differs. The configuration will be described.

  The pole saver saw 300 includes an operation rod 303. The operation rod 303 includes a first rod 303A and a second rod 303B, and the first rod 303A and the second rod 303B are connected by a rotation angle changing mechanism 204.

  The first rod 303A is a cylindrical member extending in the front-rear direction, is configured to support the gear housing 5 and be connectable to the rotation angle changing mechanism 204, and is provided with a handle 33. The front end portion of the first rod 303A is connected to the gear housing 5 so as not to be rotatable relative to the gear housing 5, and supports the gear housing 5. The rear end portion of the first rod 303A is inserted into the rotation angle changing mechanism 204, and fixed holes 3a to 3d are formed. The fixing holes 3a to 3d are formed at regular intervals in the circumferential direction at the rear end of the first rod 303.

  The second rod 303B is a cylindrical member that extends in the front-rear direction, and is provided with a grip 31 and a hanger 32. The front end portion of the second rod 303 is connected to the rotation angle changing mechanism 204 so as not to be relatively rotatable, and the rear end portion of the second rod 303B is connected to the front portion of the internal combustion engine 2 so as not to be relatively rotatable.

  Thus, when changing the direction in which the blade portion 9A faces, the handle 33 is provided on the first rod 303A that rotates together with the gear housing 5, so that the user grasps the handle 33 and the gear housing 5 and the first棹 303A can be rotated relative to the second ridge 303B. For this reason, compared with the case where the handle 33 is not provided in the first rod 303A, the user can change the direction in which the blade portion 9A faces with less force, thereby reducing the burden on the user during work. Can do.

  Next, a pole saver saw 400 according to a fourth embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same structure as the pole saver saw 1 by the 1st Embodiment of this invention, or the pole saver saw 200 by the 2nd Embodiment of this invention, description is abbreviate | omitted and it differs. The configuration will be described.

  As shown in FIG. 9, the pole saver saw 400 includes an operating rod 403, an angle changing mechanism 10, and a drive shaft 434. The operating rod 403 includes a first rod 403A and a second rod 203B, and the first rod 403A and the second rod 203B are connected by a rotation angle changing mechanism 204.

  The first rod 403 </ b> A is a cylindrical member extending in the front-rear direction, and its front end is connected to the angle changing mechanism 10 so as not to rotate relative to the angle changing mechanism 10, and supports the gear housing 5 via the angle changing mechanism 10. . In addition, fixing holes 3 a to 3 d are formed at the rear end of the first rod 403 </ b> A and inserted into the rotation angle changing mechanism 204. The fixing holes 3a to 3d are formed at regular intervals in the circumferential direction at the rear end of the first rod 403.

  The second rod 203B is a cylindrical member extending in the front-rear direction, and is provided with a grip 31, a hanger 32, and a handle 33. The front end portion of the second rod 203B is connected to the rotation angle changing mechanism 204 so as not to be relatively rotatable, and the rear end portion of the second rod 203B is connected to the front portion of the internal combustion engine 2 so as not to be relatively rotatable.

  As shown in FIGS. 10 and 11, the angle changing mechanism 10 is a mechanism for changing the angle formed between the axis of the plunger 7 and the axis of the operating rod 403, and includes the gear housing 5, the operating rod 403, and the like. And is configured by a base portion 11 and an arm portion 12. The angle changing mechanism 10 corresponds to an angle changing unit and a blade direction changing unit.

  The base portion 11 includes a cylindrical portion 11A and a fan-shaped portion 11B. The cylindrical portion 11 </ b> A is a cylindrical member that is formed at the rear portion of the angle changing mechanism 10 and extends in the front-rear direction, and has an inner diameter that is slightly larger than the outer diameter of the operating rod 403. The base part 11 corresponds to a base part.

  The fan-shaped part 11B is a fan-shaped member formed in the front part of the cylindrical part 11A, is formed integrally with the cylindrical part 11A, and the width in the left-right direction is substantially equal to the outer diameter of the cylindrical part 11A. It is configured. A shaft hole 11a and angle adjustment holes 11b to 11f are formed in the fan-shaped portion 11B. Further, stoppers 11D that protrude in the axial direction of the shaft screw 12C and face the upper surface or the lower surface of the arm portion 12 are formed at both ends of the fan-shaped portion 11B. Furthermore, a hole extending in the front-rear direction that is continuous from the inside of the cylindrical portion 11A is formed inside the fan-shaped portion 11B, and the first flange 403A extends from the inside of the cylindrical portion 11A to the inside of the fan-shaped portion 11B. The front part is inserted. With the front portion of the first rod 403A inserted, the base portion 11 is fixed to the first rod 403A by a set screw 11C from the outside of the cylindrical portion 11A.

  The shaft hole 11a is a screw hole penetrating from the outside to the inside of the fan-shaped part 11B, and is formed at the substantially center in the vertical direction of the fan-shaped part 11B and on the left and right sides of the rear part. The angle adjustment holes 11b to 11f are holes formed at a predetermined depth from the outside of the left side surface of the fan-shaped portion 11B toward the right, and the distances between the angle adjustment holes and the shaft holes 11a are substantially equal. Has been. Further, the angle formed between the straight line connecting each angle adjusting hole and the shaft hole 11 a and the axis of the operating rod 403 is configured to be a predetermined angle based on the axis of the operating rod 403.

  Specifically, an angle formed by a straight line connecting the angle adjusting hole 11b and the shaft hole 11a with the axis of the operating rod 403 as a reference and counterclockwise as positive (hereinafter referred to as an adjusting angle). ) Is −60 °, the adjustment angle of the angle adjustment hole 11c is −30 °, the adjustment angle of the angle adjustment hole 11d is 0 °, the adjustment angle of the angle adjustment hole 11e is 30 °, and the adjustment angle of the angle adjustment hole 11f. Is 60 °.

  The arm portion 12 is a member that connects the base portion 11 and the gear housing 5 and that allows the gear housing 5 to turn around the shaft hole 11a of the base portion 11, and includes a right arm 12A, a left arm 12B, and the like. , And two shaft screws 12C each having a screw portion at the tip. The arm part 12 corresponds to an arm part.

  The right arm 12A is a flat plate-like member extending rearward from the right side of the rear end surface 5E of the gear housing 5, and has an arm shaft hole 12a. The arm shaft hole 12a is a hole formed in the rear part of the right arm 12A and penetrating in the left-right direction. The shaft screw 12C is screwed into the shaft hole 11a in a state where the shaft screw 12C is inserted into the arm shaft hole 12a, and the right arm 12A is rotatable about the shaft screw 12C.

  The left arm 12B is a flat plate member extending rearward from the left side of the rear end surface 5E of the gear housing 5, and is configured to sandwich the base portion 11 from the left and right directions together with the right arm 12A. 12b, a lock hole 12c, and a lock mechanism 13 are formed. The arm shaft hole 12b is a hole formed in the rear portion of the right arm 12A and penetrating in the left-right direction, and has a positional relationship that substantially coincides with the arm shaft hole 12a in a side view. The shaft screw 12C is threaded into the shaft hole 11a while being inserted into the arm shaft hole 12b, and the left arm 12B is rotatable about the shaft screw 12C. Since the right arm 12A and the left arm 12B are rotatable about the corresponding shaft screws 12C, the gear housing 5 connected to the right arm 12A and the left arm 12B is rotatable about the shaft screws 12C. It is. Accordingly, the user can change the axis of the plunger 7 provided in the gear housing 5 by the angle changing mechanism 10 by a predetermined angle with reference to the axis of the operating rod 403.

  The lock hole 12c is a hole penetrating in the left-right direction, and the distance between the lock hole 12c and the arm shaft hole 12b is such that each angle adjustment hole and the shaft hole 11a can be opposed to each angle adjustment hole of the base portion 11. It is formed so as to be substantially equal to the distance.

  As shown in FIG. 11, the lock mechanism 13 is a mechanism for fixing the gear housing 5 and the arm portion 12 to the base portion 11 at a rotation angle position obtained by rotating the gear housing 5 and the arm portion 12 by a predetermined angle around the shaft screw 12C. The support portion 14, the fixing pin 15, and the spring 16 are configured. The lock mechanism 13 corresponds to a rotation angle fixing means.

  The pin support portion 14 includes a contact portion 14A and a support portion 14B. The contact portion 14A is a member extending in the vertical direction, and a support portion 14B extends in the right direction from each of the upper end portion and the lower end portion, and is connected to the left arm 12B. A pin insertion hole 14a penetrating in the left-right direction is formed substantially at the center in the up-down direction of the contact portion 14A. The pin insertion hole 14a and the lock hole 12c have a substantially coincident positional relationship in a side view.

  The fixing pin 15 includes a cylindrical portion 15A, a knob portion 15B, and a retaining ring 15C. The cylindrical portion 15A is a member having a substantially cylindrical shape extending in the left-right direction. The cylindrical portion 15A is inserted through the pin insertion hole 14a, the lock hole 12c, and the angle adjustment hole 11d, and the arm portion 12 and the gear housing 5 with respect to the base portion 11 are inserted. The rotation is restricted. The knob portion 15B is an enlarged diameter portion provided at the left end portion of the cylindrical portion 15A. Further, the retaining ring 15C is a portion having a diameter larger than that of the lock hole 12c, and the cylindrical portion 15A passes through the pin insertion hole 14a, the lock hole 12c, and the angle adjustment hole 11d of the base portion 11 in a state where all of them are passed. , Provided at a position in contact with the left side surface of the left arm 12B.

  The spring 16 is an urging member fitted to the cylindrical portion 15A of the fixing pin 15. The left end portion contacts the right side surface of the contact portion 14A of the pin support portion 14 and the right end portion contacts the retaining ring 15C. It touches. The spring 16 biases the retaining ring 15C in the right direction to bias the entire fixing pin 15 in the right direction. Thus, since the spring 16 biases the fixing pin 15 to the right, the cylindrical portion 15A of the fixing pin 15 is inserted into the pin insertion hole 14a, the lock hole 12c, and the angle adjustment hole 11d of the base portion 11. Is held.

  The drive shaft 434 is disposed in the operation rod 403 and is a member that transmits the rotational force of the internal combustion engine 2 extending from the internal combustion engine 2 to the reciprocation conversion mechanism 6 in the gear housing 5 to the reciprocation conversion mechanism 6. A flexible shaft 434B is provided.

  The flexible shaft 434B is a known member capable of transmitting a rotational force in a bent state, and occupies a portion extending from the inside of the first rod 403A of the operation rod 403 of the drive shaft 434 to the reciprocating motion conversion mechanism 6. When the portion of the drive shaft 434 is configured by the flexible shaft 434B, the angle between the shaft center of the plunger 7 arranged in the gear housing 5 and the shaft center of the operating rod 403 is changed by the angle changing mechanism 10. Even when the drive shaft 434 is bent, the rotational force of the internal combustion engine 2 can be reliably transmitted to the reciprocating motion conversion mechanism 6.

  Here, the angle changing mechanism 10 in the direction in which the blade portion 9A of the blade 9 faces when the angle changing mechanism 10 fixes the axis of the plunger 7 at a rotation angle position that is changed by a predetermined angle with respect to the axis of the operating rod 403. This will be described together with the ten operation methods. 12 represents the direction in which the blade portion 9A faces, the straight line B represents the axis of the plunger 7, and the straight line C represents the axis of the operating rod 403.

  When it is desired to change the direction (arrow A) in which the blade portion 9A of the blade 9 faces, it is fixed from the state shown in FIGS. 10 and 11, that is, the gear housing 5 and the arm portion 12 are fixed to the base portion 11. By moving the pin 15 counterclockwise against the urging force of the spring 16, the fixing pin 15 is removed from the angle adjusting hole 11 d of the base portion 11, and the fixing of the gear housing 5 and the arm portion 12 to the base portion 11 is released. Is done.

  The gear housing 5 and the arm portion 12 are rotated around the shaft screw 12C in a state where the fixing of the gear housing 5 and the arm portion 12 to the base portion 11 is released, and any of the angle adjustment holes 11b to 11f of the base portion 11 is rotated. The hand is released from the fixing pin 15 at the rotation angle position where the hole and the lock hole 12c face each other. By releasing the hand from the fixing pin 15, the fixing pin 15 is inserted into the angle adjustment hole of the base portion 11 facing the lock hole 12 c by the biasing force of the spring 16, and the gear housing 5 and the arm portion 12 are fixed to the base portion 11. Is done.

  Specifically, the counterclockwise direction in the side view is positive with respect to the axis of the operating rod 403 (straight line C), and the angle between the axis of the plunger 7 (straight line B) and the axis of the operating rod 403 (below) 10), the fixing is released from the state shown in FIGS. 10 and 11, and the gear housing 5 and the arm portion 12 are rotated 60 in the clockwise direction around the shaft screw 12C. The gear housing 5 and the arm part 12 are fixed to the base part 11 by rotating and releasing the hand from the fixing pin 15 at the rotation angle position where the lock hole 12c and the angle adjusting hole 11b of the base part 11 are opposed to each other. . In this state, the direction in which the blade portion 9A faces is orthogonal to the plunger 7, and therefore forms an angle of 30 ° with the axis of the operating rod 403 (the state of the broken line in FIG. 12). At the above angle, the upper surface of the arm portion 12 comes into contact with the upper stopper 11D, and further rotation is restricted.

  In order to set the rotation angle to −30 °, the gear housing 5 and the arm portion 12 are fixed to the base portion 11 at a rotation angle position where the lock hole 12c and the angle adjustment hole 11c are opposed to each other. In this state, the direction in which the blade portion 9A faces is at an angle of 60 ° with the axis of the operating rod 403. In order to set the rotation angle to 0 °, the gear housing 5 and the arm portion 12 are fixed to the base portion 11 at a rotation angle position where the lock hole 12c and the angle adjustment hole 11d face each other. In this state, the direction in which the blade portion 9A faces is at an angle of 90 ° with the axis of the operating rod 403 (the state shown in FIGS. 10 and 11).

  In order to set the rotation angle to 30 °, the gear housing 5 and the arm portion 12 are fixed to the base portion 11 at a rotation angle position where the lock hole 12c and the angle adjustment hole 11e face each other. In this state, the direction in which the blade portion 9A faces is at an angle of 120 ° with the axis of the operating rod 403. In order to set the rotation angle to 60 °, the gear housing 5 and the arm portion 12 are fixed to the base portion 11 at a rotation angle position where the lock hole 12c and the angle adjustment hole 11f are opposed to each other. In this case, the direction in which the blade portion 9A faces in this state forms an angle of 150 ° with the axis of the operating rod 403 (solid line state in FIG. 12). At the above angle, the lower surface of the arm portion 12 comes into contact with the lower stopper 11D, and further rotation is restricted.

  In this way, the gear housing 5 can be fixed to the operating rod 403 in a state where the angle formed by the axis of the operating rod 403 and the axis of the plunger 7 is changed, so that the entire pole saver saw 400 can be tilted or rotated. The direction in which the blade portion 9A faces can be changed without making it. For this reason, when the direction in which the blade portion 9A faces is set at an angle of 150 ° with the axis of the operating rod 403, the blade portion 9A is facing forward as viewed from the user, and the branch or the like to be cut is removed. It can cut | disconnect from the top using the weight of the pole saver saw 400, can reduce the burden of the user on an operation | work, and can aim at the improvement of work efficiency. Further, since the pole saver saw 400 also includes the rotation angle changing mechanism 204, the direction in which the blade portion 9A faces is the number of rotation angle positions of the angle change mechanism 10 and the number of rotation angle positions of the rotation angle change mechanism 204. Therefore, it is possible to flexibly correspond to the direction in which the blade portion 9A faces in various work situations, and the convenience and workability can be further improved.

  The work tool according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the invention described in the claims. For example, the operation hole 3 of the pole saver saw 1 is formed with fixing holes 3a to 3d at intervals of 90 ° in the circumferential direction. However, the present invention is not limited to this, and it is fixed as long as the strength of the operation hole 3 allows. The number of holes can be increased.

  Further, in the pole saver saw 1, a plurality of fixing holes are formed in the operation rod 3, and the rotation angle changing mechanism 4 is formed with one first pin insertion hole 41a that can face the fixing hole. However, only one fixing hole may be formed in the operating rod 3, a plurality of first pin insertion holes may be formed in the rotation angle changing mechanism 4, and fixing pins corresponding to the plurality of first pin insertion holes may be provided. .

  Further, in the pole saver saw 200, the front end portion of the second rod 203B is connected to the rotation angle changing mechanism 204 so as not to rotate relative to the rotation angle changing mechanism 204, and the first rod 203A is inserted into the rotation angle changing mechanism 204. However, the rear end of the first rod 203A may be connected to the rotation angle changing mechanism 204 so as not to rotate relative to the rotation angle changing mechanism 204, and the second rod 203B may be inserted into the rotation angle changing mechanism 204.

  Further, in the pole saver saw 400, the base portion 11 of the angle changing mechanism 10 is connected to the operating rod 403, and the arm portion 12 is connected to the gear housing 5, but the base portion 11 is connected to the gear housing 5. The arm unit 12 may be connected to the operation rod 403. Further, in the pole saver saw 400, the flexible shaft 434B is used, but a universal joint may be used.

  In the embodiment of the present invention, the internal combustion engine 2 is used as a drive source, but an electric motor may be used.

1, 200, 300, 400 ·· Pole saver saw 2 · Internal combustion engine 3, 203, 303, 403 · · Operation rod 3a, 3b, 3c, 3d · · Fixed hole 4, 204 · · Rotation angle changing mechanism ·・ Gear housing 5F ・ ・ Base 6 ・ ・ Reciprocating motion conversion mechanism 7 ・ ・ Plunger 8 ・ ・ Blade holder 9 ・ ・ Blade 9A ・ ・ Blade part 10 ・ ・ Angle changing mechanism 11 ・ ・ Base part 12 ・ ・ Arm part 13 ・· Lock mechanism 14a · · Pin insertion hole 33 · · Handle 34, 434 · · Drive shaft 41, 241 · · Connection cylinder portion 41a · · First pin insertion hole 43 · · Fixing pin 203A, 303A, 403A · · · first棹 203B, 303B ・ ・ 2nd 434B ・ ・ Flexible shaft

Claims (9)

A driving source;
A drive shaft having one end connected to the drive source and driven to rotate by the drive force of the drive source;
A housing covering the other end of the drive shaft;
A reciprocating motion conversion mechanism provided in the housing for converting the rotation of the drive shaft into a reciprocating motion;
An output shaft connected to the reciprocating motion conversion mechanism, reciprocatingly driven by the reciprocating motion conversion mechanism, and capable of fixing a saw blade having a blade portion;
A base provided in front of the housing and extending in a direction crossing the reciprocating direction of the output shaft;
A long operation rod connected to the drive source on one end side, supporting the casing on the other end side, and having the drive shaft disposed therein;
A work tool comprising: blade direction changing means for changing a direction in which the blade part faces. The blade direction changing means is provided so as to connect the casing and the other end side of the operating rod,
2. The work tool according to claim 1, further comprising angle changing means for changing a direction in which the blade part faces by changing an angle formed by an axis of the output shaft and an axis of the operating rod. . The angle changing means includes a base connected to the other end of the operating rod,
An arm connected to the housing and rotatably supported by the base;
3. The rotation angle fixing means for fixing the arm portion to the base at a plurality of rotation angle positions where the arm portion is rotated with respect to the base portion. Work tools.   The work tool according to claim 2 or 3, wherein the drive shaft has a portion configured to transmit a rotational force to the reciprocating motion conversion mechanism even when the drive shaft is bent.   The blade direction changing mechanism changes the direction in which the blade faces by allowing the case to be fixed to the operation rod at a plurality of rotation angle positions where the case is rotated about the axis of the operation rod. The work tool according to any one of claims 1 to 4, further comprising a rotation angle changing means for performing the operation. The operation rod is formed with a heel side fixing hole,
The rotation angle changing means is connected to the casing and can be connected to the operation rod, and a cylinder portion having a cylinder side fixing hole formed therein;
In a state where the operating rod is connected to the cylinder portion, a rotation angle fixing member that fixes the operating rod and the cylinder portion to each other by inserting the rod side fixing hole and the cylinder side fixing hole, 6. The work tool according to claim 5, wherein a plurality of either the flange-side fixing hole or the cylinder-side fixing hole is formed side by side in the circumferential direction. The operating rod is composed of a first rod disposed on the housing side and a second rod disposed on the drive source side,
The rotation angle changing means includes: a hook connecting tube provided on one of the first hook and the second hook, the hook connecting cylinder, and either the first hook or the second hook. A rotation angle fixing member for fixing the connection, a cylinder-side fixing hole is formed in the flange connecting cylinder portion, and a flange-side fixing hole is formed in either one of the first flange or the second flange. Any one of the cylinder side fixing hole and the flange side fixing hole is formed in a row in the circumferential direction, and the rotation angle fixing member can penetrate the cylinder side fixing hole and the flange side fixing hole. The work tool according to claim 5, wherein the work tool is provided on the work tool.   The work tool according to claim 7, wherein the first rod is provided with a grip portion for a user to grip.   The work tool according to claim 7, wherein a grip portion for a user to grip is provided on the second rod.

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