JP2011208592A - Work tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work tool which allows a desired finger of a user to perform a trigger operation even though a handle section is shifted from one hand to the other hand.SOLUTION: A housing 10 includes the handle section 10A. The uppermost part of the handle section 10A includes a substantially cylindrical grip section 10B extended in the back-and-forth direction; and a grip section support section 10C supporting the grip section 10B at both ends in the axial direction of the grip section 10B. The grip section support section 10C is formed with flange section storing recessed portions 10a and 10a that are substantially flange-shaped recessed portions. One end and the other end of the grip section 10B include flange sections 10D and 10D, respectively. These flange sections 10D are stored in the flange section storing recessed portion 10a. The grip section 10B includes the trigger 10E. The other end of a wire 31 whose one end is connected to a carburetor of an engine 30 is fixed to part of the trigger 10E.

Description

  The present invention relates to a work tool, and more particularly, to a work tool that is gripped by a user by changing the holding method between when air is blown and when suction is performed.

  2. Description of the Related Art Conventionally, work tools that can perform blowing and suction are known. As shown in FIG. 10, a work tool 1001 includes a housing 1010 having a handle portion 1010A, an engine 1030 supported by the housing 1010, and a fan that is rotatably supported by the housing 1010 and is rotated by a rotational force generated in the engine 1030. 1013.

  The handle portion 1010A is provided with a trigger 1010E, and the engine 1030 can be driven by operating the trigger 1010E. The fan 1013 is a centrifugal fan. A cylindrical air suction cylinder 1090 can be fixed to the housing 1010 in a positional relationship coaxial with the fan 1013. An air compression chamber is defined in the housing 1010 at a position facing the peripheral edge of the fan 1013. The portion of the housing 1010 that defines the air compression chamber is provided with a nozzle connection portion 1010F that extends outward from the housing 1010. The nozzle portion 80 or the dust bag 83 can be connected to the nozzle connecting portion 1010F.

  When the engine 1030 is driven and the fan 1013 rotates, air is sucked into the housing 1010 through the air suction cylinder 1090. Air flows into the air compression chamber through the fan 1013 and is compressed, and is blown out of the nozzle unit 80 from the nozzle unit 80 through the nozzle connection unit 1010F.

  When used as a blower, the user holds the handle portion 1010A and operates the trigger 1010E with a finger to blow air. When used as a suction device, as shown in FIG. 12, the user changes the handle 1010A and operates the trigger 1010E with a finger different from that for the blower to perform suction. Such a work tool is described in, for example, JP 2009-264296 A (Patent Publication 1).

JP 2009-264296 A

  However, in the conventional work tool, as described above, the handle portion is changed between when used as a blower and when used as a suction device, and when used as a suction device, triggers are used with different fingers. Because it was operated, it was not possible to perform a delicate trigger operation, and the operability was poor.

  Accordingly, an object of the present invention is to provide a work tool that can perform a trigger operation with a user's desired finger even if the handle portion is changed.

  In order to achieve the above object, the present invention provides a housing having a handle portion, a power generation source supported by the housing, and rotatably supported by the housing, and rotated by power generated by the power generation source. The handle portion has a rotatable rotating portion, and the rotating portion protrudes in one direction from the rotating portion, and the power generated in the power generation source by adjusting the protruding amount. Is provided, and a working tool that can change the protruding direction of the trigger by rotating the rotating portion is provided.

  Since the rotating part can rotate, even if the rotating part is gripped at various angular positions around the axis of the rotating part, it can be rotated so that the trigger can be held and operated with the user's desired finger. The part can be rotated. For this reason, even if it is a case where it is used as a blower device or a case where it is used as a suction device, a trigger can always be operated with a user's desired finger. And operability can be improved.

  Here, it is preferable to have a restricting means that functions at a predetermined rotational position when the rotating portion is rotated and restricts the rotation of the rotating portion. When the rotating unit is rotated, the rotating unit functions at a predetermined rotation position and has a restricting unit that restricts the rotation of the rotating unit. Therefore, the rotating unit can be prevented from rotating unnecessarily greatly. For this reason, when the trigger and the power generation source are connected by a wire or the like, it is possible to prevent the wire from being extremely twisted.

  The handle portion includes a rotating portion supporting portion that rotatably supports the rotating portion, the rotating portion includes a rotating support portion that is rotatably supported by the rotating portion supporting portion, and the restricting means includes: The rotating support part and the rotating part have protrusions provided in a radial direction with respect to the rotation axis of the rotating part, and the protrusions are in contact with each other when the rotating part is positioned at a predetermined rotation position. It is preferable that the rotation of the rotating portion is regulated by contact.

  The handle portion has a rotating portion supporting portion that rotatably supports the rotating portion, the rotating portion has a rotating support portion that is rotatably supported by the rotating portion supporting portion, and the restricting means is provided on the rotating support portion and the rotating portion. In order to regulate the rotation of the rotating part by having the protruding part provided toward the radial direction with respect to the rotation axis of the rotating part, and the protruding parts abut when the rotating part is located at a predetermined rotational position, The rotation of the rotating unit can be restricted within a predetermined rotation angle range with a relatively simple configuration.

  The handle portion includes a rotating portion supporting portion that rotatably supports the rotating portion, the rotating portion includes a rotating support portion that is rotatably supported by the rotating portion supporting portion, and the restricting means includes: A fitting portion provided in the rotating portion along a circumferential direction of the rotating portion; and a locking member provided in the rotating support portion and engageable with the fitting portion. It is preferable that the rotation of the rotating portion is locked by fitting the fitting portion and the engaging member when the rotation portion is located at the rotation position.

  The handle portion has a rotating portion supporting portion that rotatably supports the rotating portion, the rotating portion has a rotating support portion that is rotatably supported by the rotating portion supporting portion, and the restricting means extends along the circumferential direction of the rotating portion. A fitting portion provided in the rotating portion and a locking member provided in the rotating support portion and engageable with the fitting portion, and when the rotating portion is located at a predetermined rotational position, Since the rotation of the rotating portion is locked by the engagement with the engaging member, the predetermined rotation angle range in which the rotation of the rotating portion is restricted can be flexibly changed.

  Moreover, it is preferable that this fitting part consists of a ratchet tooth. Since the fitting portion is composed of ratchet teeth, the predetermined rotation angle range in which the rotation of the rotating portion is restricted can be finely and flexibly changed.

  In addition, it is preferable to have rotation fixing means for fixing the rotating part to the handle part by an operator's operation after rotating the rotating part with respect to the handle part.

  Since there is a rotation fixing means for fixing the rotating part to the handle part by an operator's operation after rotating the rotating part with respect to the handle part, the rotating part may rotate unexpectedly. Can be prevented.

  Further, the rotation fixing means includes a fixing release position that enables rotation of the rotating portion relative to the rotating portion support portion, and a fixing position that fixes rotation of the rotating portion relative to the rotating portion support portion. It is preferable to include a stopper pin that can be moved to a fixed position and an elastic body that urges the stopper pin to move to a fixed position at all times.

  The rotation fixing means is movable between a fixed release position that enables rotation of the rotating part relative to the rotating part support part and a fixed position that fixes rotation of the rotating part relative to the rotating part support part. A stopper pin and an elastic body that constantly urges the stopper pin to move to a fixed position. Therefore, the stopper pin is automatically engaged with the rotating portion by rotating the rotating portion to a predetermined rotation angle. be able to. For this reason, the rotating part can be easily fixed at a predetermined rotation angle.

  As described above, the present invention can provide a work tool capable of operating a trigger with a user's desired finger even if the handle portion is changed.

The right side fragmentary sectional view which shows a mode when the working tool by embodiment of this invention is used as a blower apparatus. The right side fragmentary sectional view which shows a mode when the working tool by embodiment of this invention is used as a suction device. The partial cross-section rear view which shows a mode when the working tool by embodiment of this invention is used as a suction device. The principal part sectional drawing which shows the holding part of the modification of the working tool by embodiment of this invention. The principal part sectional drawing which shows the holding part of the modification of the working tool by embodiment of this invention. The principal part sectional drawing which shows the holding part of the other modification of the working tool by embodiment of this invention. The principal part sectional drawing which shows the holding part of the other modification of the working tool by embodiment of this invention. The principal part sectional drawing which shows the holding part of the other modification of the working tool by embodiment of this invention. The principal part sectional drawing which shows the holding part of the other modification of the working tool by embodiment of this invention. The right side fragmentary sectional view which shows a mode when the conventional working tool is used as a blower apparatus. The left view which shows the conventional work tool. The partial cross-section rear view which shows a mode when the conventional working tool is used as a suction device. The perspective view which shows a mode when the conventional working tool is used as a blower apparatus. The perspective view which shows a mode when the conventional working tool is used as a suction device.

  An embodiment of a work tool according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the work tool 1 is a device that can blow and suck, and a main housing 11, an engine 30 provided in the main housing 11, and a fan housing that houses a fan (not shown) described later. 12 (FIG. 3), a nozzle portion 80 (FIG. 13), and an air suction cylinder 90. The main housing 11 and the fan housing 12 constitute a housing 10.

  In the following description, the left side in FIG. 1 is defined as the rear end side of the work tool 1, the right side is defined as the front end side of the work tool 1, the upper side in FIG. 1 is the upper side of the work tool 1, and the lower side is the lower side of the work tool 1. 1 is defined as the right direction, and the direction from the front side to the back side of FIG. 1 is defined as the left direction.

  The engine 30 is fixed to the main housing 11 that mainly forms the right side of the housing 10. The engine 30 is a two-cycle engine and corresponds to a power generation source. A fan housing (not shown) is accommodated in a fan housing 12 that mainly constitutes the left side of the housing 10, and the fan (not shown) is fixed to a crankshaft (not shown) of the engine 30 and can rotate integrally with the crankshaft. is there. Therefore, a fan (not shown) is supported on the housing 10 via the engine 30. Further, the inner peripheral surface of the fan housing 12 defines an air compression chamber that guides the flow of air generated by a fan (not shown) in the circumferential direction of the fan (not shown).

  The housing 10 is provided with a nozzle connection portion 10 </ b> F that extends outwardly from the housing 10. The nozzle connecting portion 10F has a substantially cylindrical shape, and can be divided into two parts by a plane including its axis, one of which is integrated with the main housing 11 and the other is integrated with the fan housing 12. . The space inside the nozzle connection portion 10F communicates with the air compression chamber. A tube part 81 or a dust bag 83 of the nozzle part 80 to be described later can be connected to the nozzle connection part 10F.

  The nozzle portion 80 is the same as the nozzle portion 80 mounted on a conventional work tool, and has a tubular tube portion 81 and a nozzle 82 as shown in FIG. One end portion of the tube portion 81 can be connected to the nozzle connecting portion 10 </ b> F, and the nozzle 82 can be connected to the other end portion of the tube portion 81. When the work tool 1 is used as a blower device (blower device), one end portion of the tube portion 81 is connected to the nozzle connection portion 10F, and the nozzle 82 is connected to the other end portion of the tube portion 81. When the work tool 1 is used as a suction device, a dust collection bag 83 (FIG. 14) is connected to the nozzle connection portion 10F instead of the nozzle portion 80.

  A substantially circular opening is formed in the portion of the fan housing 12 that faces the fan (not shown), and the opening extends from the periphery to the left in a positional relationship coaxial with the opening. A cylindrical air suction tube connecting portion is provided. A substantially cylindrical air suction cylinder 90 or a dust cover (not shown) can be attached to the air suction cylinder connection portion (not shown). When using the work tool 1 as a blower device, a dust-proof cover is attached to an air suction tube connecting portion (not shown), and when using the work tool 1 as a suction device, an air suction tube 90 is used instead of the dust-proof cover. Is attached coaxially to an air suction tube connecting portion (not shown).

  The upper part and the lower part of the housing 10 have handle parts 10A and 10M (FIG. 3) for carrying the work tool 1 and holding it during work. The handle portion 10M has a substantially annular shape, and has a positional relationship in which the substantially annular axial direction is directed in the vertical direction.

  The handle portion 10A has a substantially annular shape that protrudes upward. The uppermost portion of the handle portion 10A supports the grip portion 10B that extends in the front-rear direction and the grip portion 10B at both axial ends of the grip portion 10B. It has a gripping part support part 10C. The gripping part 10B corresponds to a rotating part. Further, the gripping part supporting part 10C corresponds to a rotating part supporting part. Flange receiving recesses 10a and 10a, which are substantially flange-shaped recesses, are respectively formed in the gripping part support part 10C facing the one end and the other end in the axial direction of the gripping part 10B.

  The grip portion 10B is a portion that is gripped by a user of the work tool 1 so that the finger is wound, and one end and the other end in the axial direction of the grip portion 10B have flange portions 10D and 10D, respectively. The flange portion 10D is accommodated in the flange portion accommodating recess 10a. With this configuration, the gripping portion 10B is wound around the axis of the gripper support portion 10C and the user's finger is gripped by the gripping portion 10B. And is supported so as to be rotatable in the anti-winding direction.

  A trigger 10E is provided in a portion from the approximate center to the tip of the gripping portion 10B, and the trigger 10E is supported by the gripping portion 10B so as to be rotatable about a rotation shaft 10I. The position where the trigger 10E is provided is a position facing the user's desired finger of the work tool 1, and the trigger 10E can be operated by the user's desired finger. The other end of the wire 31 having one end connected to the carburetor of the engine 30 is fixed to a part of the trigger 10E. The wire 31 can be pulled in the longitudinal direction by the rotation of the trigger 10E. By pulling in this way, the opening / closing degree of a throttle valve (not shown) of a carburetor (not shown) of the engine 30 can be adjusted. It is.

  A portion closer to one end than the other end portion of the wire 31 is covered with a tube 32, and a rib 33 is fixed to an end portion of the tube 32 in the grip portion 10B. The rib 33 is fixed to the inner peripheral surface of the grip portion 10B with a screw or the like (not shown). The position where the rib 33 is fixed is disposed on the axis I of the gripping portion 10B as shown in FIGS. Further, the distance from the rib 33 to the other end of the wire 31 is the same when the gripping portion 10B rotates in the state shown in FIG. 1 and when the gripping portion 10B rotates in the state shown in FIG. . Therefore, the amount that the trigger 10E is pulled when the gripping portion 10B is rotated to the state shown in FIG. 1 is the same as the amount that the trigger 10E is pulled when it is rotated to the state shown in FIG. For example, the throttle valve of a carburetor (not shown) can be configured to have the same opening / closing degree.

  The work tool 1 can be used as a blower device as shown in FIG. 13 by rotating the grip 10B in the state shown in FIG. 1 and gripping the handle 10A with one hand. Further, by rotating the gripping portion 10B to the state shown in FIG. 2, the work tool 1 is tilted sideways and the handle portion 10A is gripped with the right hand and the handle portion 10B is gripped with the left hand as shown in FIG. As shown in FIG. 14, the working tool 1 can be used as a suction device. In either case, the trigger 10E can be operated with a user's desired finger. For this reason, a delicate trigger operation can be performed with a user's desired finger, and operability can be improved.

  The work tool of the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, you may have a control means which controls rotation of the holding part which is a rotation part within a predetermined rotation angle range.

  For example, the rotating part has a rotating support part that is rotatably supported by the rotating part support part, and the restricting means is a protrusion provided on the rotating support part and the rotating part in the radial direction with respect to the rotation axis of the rotating part. The protrusions may come into contact with each other when the rotating part is positioned at a predetermined rotational position, and the rotation of the rotating part may be restricted.

  More specifically, for example, as shown in FIGS. 4 and 5, a groove 110b extending in the rotation direction of the gripping part 110B is formed in the gripping part support part 110C, and the gripping part 110B includes a gripping part support part 110C. The protrusion 110G is always engaged with the groove 110b and movable within the groove 110b. A rib 110H is provided in the groove 110b. The portion of the grip portion 110B where the groove 110b is formed corresponds to the rotation support portion, and the portion where the convex portion 110G is provided corresponds to the rotation portion support portion. The portion of the grip 110B that defines the end of the groove 110b in the rotation direction of the protrusion 110G and the grip 110B corresponds to a protrusion.

  With such a configuration, since the convex portion 110G abuts on the rib 110H, it is possible to prevent the gripping portion 110B from rotating unnecessarily larger than about 360 °. For this reason, it can prevent that the wire 31 (FIG. 1 etc.) twists extremely. Further, the rotation of the grip 110B can be restricted within a predetermined rotation angle range with a relatively simple configuration. In this modification, the number of ribs 110H is one. However, the present invention is not limited to this configuration. For example, two ribs 110H may be provided, and the range of angles that can be rotated may be a range smaller than about 360 °. It is good also as a range smaller than about 360 degrees which can provide a long rib and can rotate.

  Furthermore, the gripping part may be restricted by the restricting means so as to be rotatable in the same rotation angle range in the clockwise direction and the counterclockwise direction around the reference rotation position. Specifically, for example, the range of the rotatable angle of the gripping part 10B is 180 ° between the state shown in FIG. 1 and the state shown in FIG.

  With such a configuration, the rotation position rotated 90 ° from the state shown in FIG. 1 to the state shown in FIG. 2 is used as a reference, and the maximum rotation angle is 90 ° clockwise from the reference rotation position. The twisted state of the wire 31 (FIG. 1 and the like) when rotated is the same as the twisted state of the wire 31 when rotated by 90 ° which is the maximum rotation angle counterclockwise from the reference rotational position. be able to. For this reason, it is possible to reliably prevent a difference in trigger operation due to a difference in twist.

  Further, the regulating means is not limited to the configuration described above. For example, the restricting means includes a fitting portion provided in the rotating portion along the circumferential direction of the rotating portion, and a locking member provided in the rotating support portion and engageable with the fitting portion. It is good also as a structure which latches rotation of a rotation part by engaging a fitting part and an engagement member when it locates in a predetermined | prescribed rotation position. Further, as shown in FIG. 8, the fitting portion may include a ratchet tooth 310H, and the engaging portion may include a tooth 310G that can be engaged with the ratchet 310H. By setting it as such a structure, the predetermined rotation angle range in which rotation of the holding part 310B which is a rotation part is controlled can be changed flexibly and finely.

  As shown in FIG. 9, four concave portions 410b are formed at equal intervals in the circumferential direction of the gripping portion 410B on the peripheral surface of the gripping portion 410B, which is a rotating portion, and a ball 410G that can be engaged with the concave portion 410b is formed by the gripping portion. You may provide in the support part 410B.

  Moreover, it is good also as a structure which has a rotation fixing means which can fix a holding | gripping part to a predetermined rotation angle. Specifically, for example, as shown in FIGS. 6 and 7, a stopper pin 215 is provided on the gripping part supporting part 210 </ b> C. The stopper pin 215 has an axial center direction oriented in the axial direction of the grip portion 210B, and can move in the same direction. The central portion in the axial direction of the stopper pin 215 has a diameter-enlarged portion 215A, and one end of a spring 216 that is an elastic body is in contact with the diameter-enlarged portion 215A. The other end of the spring 216 is in contact with a part of the grip portion support portion 210C, and the stopper pin 215 is biased toward the grip portion 210B by the spring 216.

  A through hole 210c is formed in the end surface of the grip portion 10B in the axial direction. Two through-holes 210c are formed in the diameter position on the end face of the grip portion 210B. The tip of the stopper pin 215 can be inserted into the through hole 210c.

  When the gripping portion 210B rotates to a position where the through hole 210c faces the tip of the stopper pin 215, if no force is applied to the stopper pin 215 from the outside, the biasing force of the spring 216 causes the stopper pin 215 to It is comprised so that a front-end | tip part may be inserted. At this time, the holding part 210B is temporarily fixed in a non-rotatable state. When it is desired to rotate the gripping part 210B, the stopper pin 215 is pulled against the urging force of the spring 216 in the axial direction and away from the gripping part 210B, and the tip of the stopper pin 215 is inserted into the through hole 210c. It is assumed that it has not been done. While maintaining this state, the gripping part 210B is rotated, the stopper pin 215 is opened, and the gripping part 210B is further rotated. When the through hole 210c faces the tip of the stopper pin 215, the tip of the stopper pin 215 is automatically inserted into the through hole 210c by the urging force of the spring 216, and the grip 210B cannot rotate again. It becomes a state. With such a configuration, it is possible to prevent the gripping portion 210B from rotating unexpectedly. The position of the stopper pin 215 when the distal end portion of the stopper pin 215 is inserted into the through hole 210c corresponds to the fixed position, and the position when the distal end portion of the stopper pin 215 is not inserted into the through hole 210c. The position of the stopper pin 215 corresponds to the fixed release position.

  Further, the spring 216 may not be biased. For example, a male screw is provided on the peripheral surface of the stopper pin, and the tip of the screw is inserted into the through hole or is not inserted into the through hole by screwing the screw forward and backward with respect to the holding part support part. .

  The work tool of the present invention is particularly useful in the field of work tools used by changing the handle portion.

DESCRIPTION OF SYMBOLS 1 ... Work tool 30 ... Engine 10 ... Housing 10 10A ... Handle part 10B, 110B, 210B ... Grip part 10C, 110C, 210C ... Gripper support part 10E ... Trigger 110b: groove 110G: convex portion 215: stopper pin 216: spring

Claims (7)

A housing having a handle portion;
A power generation source supported by the housing;
A fan rotatably supported by the housing and rotated by power generated by the power generation source,
The handle portion has a rotatable rotating portion, and the rotating portion protrudes in one direction from the rotating portion, and a trigger capable of adjusting the power generated in the power generation source by adjusting the protruding amount. A work tool provided and capable of changing a protruding direction of the trigger by rotating the rotating portion.   The work tool according to claim 1, further comprising a restricting unit that functions at a predetermined rotation position when the rotating unit is rotated and restricts the rotation of the rotating unit.   The handle portion includes a rotating portion supporting portion that rotatably supports the rotating portion, the rotating portion includes a rotating support portion that is rotatably supported by the rotating portion supporting portion, and the restricting means includes the rotating portion. The support part and the rotating part have protrusions provided in the radial direction with respect to the rotation axis of the rotating part, and the protrusions come into contact with each other when the rotating part is located at a predetermined rotation position. The work tool according to claim 2, wherein the rotation of the rotating portion is restricted.   The handle portion includes a rotating portion supporting portion that rotatably supports the rotating portion, the rotating portion includes a rotating support portion that is rotatably supported by the rotating portion supporting portion, and the restricting means includes the rotating portion. A fitting portion provided in the rotating portion along a circumferential direction of the portion, and a locking member provided in the rotating support portion and engageable with the fitting portion, and the rotating portion has a predetermined rotation The work tool according to claim 2, wherein the rotation of the rotating portion is locked by the fitting portion and the engaging member being fitted when positioned.   The engine tool according to claim 4, wherein the fitting portion includes ratchet teeth.   6. The rotary fixing device according to claim 1, further comprising a rotation fixing unit configured to fix the rotating unit to the handle unit by an operation by an operator after the rotating unit is rotated with respect to the handle unit. The work tool according to any one of the above.   The rotation fixing means moves to a fixed release position that enables rotation of the rotating part relative to the rotating part support part and a fixed position that fixes rotation of the rotating part relative to the rotating part support part. The work tool according to claim 6, further comprising a stopper pin that can be moved and an elastic body that urges the stopper pin to move to a fixed position at all times.

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