JP2010024987A - Portable working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable working machine that can be carried by pulling the portable working machine and by lifting it, maintaining simple and compact structure thereof. <P>SOLUTION: This portable working machine 10 comprises: a handle shaft part 35 rotatably supported by an upper front end part 11d of a frame 11, directing in the cross direction of the frame 11; a handle support part 37 extended from the handle shaft part 35; a handle holding part 41 provided in an upper rear end part 11e of the frame 11 to hold the handle support part 37 in nearly parallel with an upper part 11b of the frame 11; and a switch part 43 for switching conditions between a condition capable of holding the handle support part 37 with the handle holding part 41 and a condition capable of releasing the handle support 37 from the handle holding part 41. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a portable work machine that includes a tow wheel at a lower part of a frame and is towable using the wheel.

Among portable work machines, there is known a machine in which a generator is mounted on a frame and a base end portion of a traction handle portion is rotatably supported via a support shaft at a lower front end of the frame.
In this portable work machine, the traction handle portion can be stored in the frame by swinging the traction handle portion upward about the support shaft, and the traction handle portion can be stored about the support shaft. By swinging in the forward direction, it can be used as a towing handle portion (see, for example, Patent Document 1).
JP-A-11-321658

According to the portable working machine of Patent Document 1, the grip portion is provided at the distal end portion of the traction handle portion. The grip portion is disposed at the traction position by swinging the traction handle portion forward about the support shaft.
It is said that the user can easily carry (move) the portable work machine at a construction site or the like by gripping the grip part and pulling the portable work machine by the towing handle part.

On the other hand, some portable work machines include a lifting grip portion that lifts and carries a portable work machine on an upper part of a frame on which a generator is mounted.
This lifting grip is provided so that the left and right stays are swingable, the left holder is provided at the top of the left stay, the right holder is provided at the top of the right stay, and the left and right holders can be combined together. (For example, refer to Patent Document 1).
JP 2002-290061 A

According to the portable work machine of patent document 2, the lifting grip part which lifts and carries a portable work machine is obtained by combining left and right holders together. The portable work machine can be lifted and carried by holding the lifting grip.
It is considered that the portable work machine can be easily loaded on a truck or the like by lifting and carrying the portable work machine.

Here, transporting (towing) with a tow handle part and moving it at a construction site or the like, and lifting a portable work machine with a lifting grip part and loading it onto a truck or the like are usually performed.
Therefore, in consideration of the usability of the portable work machine, it is preferable that both the portable work machine can be moved by towing and the portable work machine can be lifted and carried.

However, in order to carry out both traction transportation (movement) and lifting transportation of the portable work machine, the portable working machine is individually provided with a traction handle part for lifting transportation and a lifting grip part for lifting transportation. There is a need.
As described above, if the portable working machine is individually provided with the traction handle part and the lifting grip part, the configuration of the portable working machine becomes complicated, and further, the portable working machine is prevented from being made compact.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable work machine that keeps the portable work machine simple and compact, and that can be transported by towing and can be carried (carried) by lifting. And

  According to a first aspect of the present invention, in the portable work machine that includes a towing wheel at a lower portion of the frame and is capable of being towed using the wheel, the upper end portion of the frame is rotatable in the width direction of the frame. A handle shaft portion supported by the handle shaft portion, a handle column portion extending from the handle shaft portion to intersect the handle shaft portion, and the handle column portion to hold the handle column portion substantially parallel to the upper portion of the frame. , A handle holding part provided at the upper other end of the frame, a switching operation for switching the handle holding part to a state in which the handle post part can be held in the handle holding part, and a state in which the handle post part can be released from the handle holding part And can be used as a lifting grip portion for lifting and carrying the frame in a state where the handle post portion is held by the handle holding portion. In a state where the handle post part released from the handle holding portion, characterized by being usable as towing handle for pulling the frame.

  According to a second aspect of the present invention, the switching operation unit includes a hollow portion that is coaxially formed in the handle column, and includes an operation shaft unit that is slidably inserted into the hollow portion from a distal end portion of the handle column. A cylindrical slider that is supported in a state of being coaxially fitted to the operation shaft portion and slidably fitted to the handle column, and the handle holding portion receives the slider. A holding hole for holding, an opening at the upper portion of the holding hole that prevents the slider from being pulled out upward and allows the operating shaft portion to be pulled out upward; The slider is released from the holding hole by being pushed into the handle post portion by a portion, and the operation shaft portion can be extracted from the opening portion. By withdrawing from, characterized by being capable of holding insert the slider on the handle holder.

  According to a third aspect of the present invention, a proximal end portion of the slider is slidably fitted to a distal end portion of the handle post portion, and a stopper projecting portion projecting radially inward is formed at the distal end portion of the slider. An elastic member that urges the cylindrical slider in a direction to be inserted into the handle holding portion is provided between the distal end portion of the portion and the stopper protruding portion.

  According to a fourth aspect of the present invention, the operation shaft portion includes an operation rod that can be slidably inserted into the hollow portion, and a grip portion that extends at a distal end portion of the operation rod in the width direction of the frame. And

  According to the first aspect of the present invention, the frame includes the handle holding portion, and the switching operation portion that switches between the holding state and the release state of the handle column portion. The switching operation unit can be switched between a state in which the handle column can be held by the handle holding unit and a state in which the handle column can be released from the handle holding unit.

And in the state which hold | maintained the handle | pillar support | pillar part with the handle | steering-wheel holding part, it can hold | maintain substantially parallel with respect to the upper part of a flame | frame.
Therefore, in a state where the handle column portion is held by the handle holding portion, it can be used as a lifting grip portion for lifting and transporting the portable work machine.
On the other hand, in a state where the handle column part is released from the handle holding part, it can be used as a towing handle part for towing a portable work machine.

  In this way, the handle column can be used as a lifting grip and a traction handle so that the portable work machine can be transported by towing and the portable work machine can be lifted and carried. Improvements can be made.

Further, since the handle post portion also serves as the lifting grip portion and the traction handle portion, it is not necessary to prepare the lifting grip portion and the traction handle portion individually.
Thereby, simplification and compactification of a portable work machine can be achieved.

In addition, when the handle column portion is held by the handle holding portion, the handle column portion can be held outside the frame by holding the handle column portion substantially parallel to the upper portion of the frame.
Therefore, when the handle column part is held by the handle holding part, it is not necessary to store the handle column part in the frame.
Thereby, since the space which accommodates the handle | steering-wheel support | pillar part from the inside of a flame | frame can be removed, a portable work machine can be simplified further and compactized.

Further, when the handle column part is held by the handle holding part, the handle column part is held at the upper part of the frame, so that the handle column part is arranged at a position where it can be easily gripped by hand.
Thereby, operation which hold | maintains a handle | steering-column support | pillar part in a handle | steering-wheel holding part, and operation which releases | releases from a handle | steering-wheel holding part can be performed easily.

In the invention which concerns on Claim 2, the switching operation part was equipped with the slider which fits to a handle | steering-wheel column | part slidably.
Then, the slider was pushed into the handle column and released from the holding hole, so that the operation shaft portion could be extracted from the opening.
On the other hand, the slider was pulled out from the handle column and inserted into the holding hole so that the slider could be held in the holding hole.

In this way, the slider can be released or held by pushing or pulling the slider.
Thereby, it is possible to easily switch between a state in which the handle column portion is used as the lifting grip portion and a state in which it is used as the towing handle portion, and it is possible to further improve usability.

In the invention according to claim 3, the stopper overhanging portion is formed at the tip of the slider, and the elastic member is provided between the stopper overhanging portion and the tip of the handle column.
Thereby, since the biasing force of the elastic member can be used for the slider pull-out operation, the slider pull-out operation can be more easily performed.

  In addition, the urging force of the elastic member can be used to keep the slider inserted in the holding hole, so that the usability can be further improved.

In the invention which concerns on Claim 4, the grip part extended in the width direction of the flame | frame was provided in the front-end | tip part of the operation rod.
Therefore, when the handle column portion is used as the traction handle portion, the grip portion can be arranged orthogonal to the traction direction.
As a result, it is possible to pull the grip part with a finger and to easily perform the pulling operation.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In order to facilitate understanding of the configuration of the portable work machine, for the sake of convenience, the towing direction is “front”, the front side is Fr, the rear side is Rr, the left side is L, and the right side is R.

FIG. 1 is a perspective view showing a portable working machine according to the present invention.
The portable work machine 10 includes a frame 11 in which an engine / generator unit (not shown) is housed, left and right wheels 13 for traction provided at a lower rear end (lower part) 11a of the frame 11, a frame 11 is an engine-driven generator including a transport structure 15 provided in an upper portion 11b of the motor 11.

The frame 11 is a skeleton member that is formed in a substantially rectangular shape and houses the engine / generator unit inside.
The frame 11 includes, for example, a bottom portion 21 on which an engine / generator unit is placed, front and rear skeleton members 22 and 23 that maintain rigidity of the frame 11, and a cover portion 24 that covers the engine / generator unit. .

The bottom portion 21 is formed in a substantially rectangular shape in plan view, and left and right wheels 13 are rotatably provided on the left and right sides of a rear end portion (lower rear end portion of the frame 11), and a front end portion (lower front end of the frame 11). Part) 11c is provided with left and right leg parts 25 (the left leg part 25 is not shown) on the left and right sides.
As an example, the front skeleton member 22 is a gate-shaped member erected on the left and right sides of the front end portion 21 b of the bottom portion 21.
As an example, the rear skeleton member 23 is a gate-shaped member erected on the left and right sides of the rear end portion 21 a of the bottom portion 21.

  The cover portion 24 includes left and right cover side walls 27 (the left cover side wall 27 is not shown) provided on the front and rear skeleton members 22 and 23, an upper cover portion 28 provided on the front and rear skeleton members 22 and 23, A front cover wall 29 provided on the front skeleton member 22 and a rear cover wall 31 provided on the rear skeleton member 23 are provided.

  The transport structure 15 includes left and right support brackets 33 and 34 provided on the top portion 22 a of the front skeleton member 22, a handle shaft portion 35 rotatably supported by the left and right support brackets 33 and 34, and a handle shaft portion 35. A handle post portion 37 provided in the central portion 35a, a handle holding portion 41 that holds the handle post portion 37, and a switching operation portion 43 that switches the handle post portion 37 to a holdable or releasable state. Yes.

FIG. 2 is an exploded perspective view showing the transport structure of the portable work machine according to the present invention.
The left support bracket 33 is mounted on the left end portion 22b of the top portion 22a of the front skeleton member 22 with bolts 46 and 46 and nuts (not shown) while being placed on the front left end 28a of the upper cover portion 28. .
The left support bracket 33 has a left mounting hole 47 formed in the left vertical portion 33a.

The right support bracket 34 is attached to the right end portion 22c of the top portion 22a of the front skeleton member 22 with bolts 46 and 46 and nuts (not shown) while being placed on the front right end 28b of the upper cover portion 28. .
The right support bracket 34 has a right mounting hole 48 formed in the right vertical portion 34a.

Left and right end portions 35b and 35c of the handle shaft portion 35 are rotatably supported by the left and right mounting holes 47 and 48, respectively.
The handle shaft portion 35 is rotatably supported by the upper front end portion (upper one end portion of the frame) 11d of the frame 11 so as to face the width direction (that is, the left-right direction) of the frame 11.
The handle shaft portion 35 has a left and right end portions 35b and 35c arranged coaxially, and a central portion 35a is bent in a state of being offset (displaced) backward with respect to the left and right end portions 35b and 35c. It is a round rod.

A handle column portion 37 extends from the central portion 35 a of the handle shaft portion 35.
The handle column portion 37 is a cylindrical member that extends rearward so as to intersect the central portion 35a.
The handle column portion 37 is a member that can be held by the handle holding portion 41.

The handle holding part 41 is mounted on the top center part 23a of the rear skeleton member 23 with bolts 51 and 51 and nuts 52 and 52 (see FIG. 6) while being placed on the rear end part 28c of the upper cover part 28. ing.
That is, the handle holding portion 41 is provided at the upper rear end portion (upper other end portion of the frame 11) 11e of the frame 11.

  Specifically, the handle holding portion 41 is raised from the base 53 attached to the top center portion 23 a of the rear skeleton member 23 with bolts 51, 51 and nuts (not shown), and the left and right ends of the base 53. The left and right holding projection pieces 54 and 55 are provided.

In the handle holding portion 41, a holding hole 57 is formed by the base 53 and the left and right holding projection pieces 54, 55, and an opening 58 is formed by the upper portions 54a, 55a of the left and right holding projection pieces 54, 55, respectively. .
The opening 58 is formed in the upper part of the handle holding part 41 (that is, the upper part of the holding hole 57) 41a.
The holding hole 57 is a hole that receives and holds a slider 71 described later.

By receiving and holding the slider 71 in the holding hole 57, the handle column 37 can be held substantially parallel to the upper portion 11 b of the frame 11.
The opening 58 is an opening that prevents the slider 71 from slipping upward and allows an operation shaft 68 described later to slip upward.

A switching operation unit 43 is provided on the handle column 37.
The switching operation unit 43 switches the handle column 37 to a state where the handle column 37 can be held by the handle holding unit 41 and the handle column 37 can be released from the handle holding unit 41.

3 is a cross-sectional view showing the switching operation portion of the transport structure according to the present invention, FIG. 4 is an exploded perspective view showing the switching operation portion of the transport structure according to the present invention, and FIG. 5 is a cross-sectional view taken along line 5-5 in FIG. is there.
The switching operation unit 43 includes a hollow portion 64 formed coaxially in the handle column 37, upper and lower guide holes 65 and 66 formed in the handle column 37, and a tip of the handle column 37 on the hollow portion 64. An operation shaft portion 68 slidably inserted from the portion 37 a, a cylindrical slider 71 fitted to the operation shaft portion 68 and fitted to the handle column portion 37, and a compression spring (elastic member) in the slider 71 72).

  The upper and lower guide holes 65 and 66 are long holes formed in the upper and lower portions of the peripheral wall 37 b of the handle column 37 along the axial direction of the handle column 37.

  The operation shaft portion 68 includes an operation rod 74 having a circular cross-section in which the insertion portion 75 is slidably inserted into the hollow portion 64, and an attachment hole 77 penetrating the insertion portion 75 of the operation rod 74 in the vertical direction. , A flange portion 78 provided substantially at the center of the operation rod 74, and a grip portion 81 having a circular cross section provided at the distal end portion 74 a of the operation rod 74.

In the operation rod 74, the insertion portion 75 between the base end portion 74b and the flange portion 78 is formed in a straight line shape, and the protrusion portion 76 between the flange portion 78 and the distal end portion 74a is formed in a slightly curved shape downward. Has been.
In the operating rod 74, the mounting hole 77 is fitted to the upper and lower guide holes 65 and 66 of the handle column 37 with the insertion portion 75 inserted into the hollow portion 64, and the lock pin 83 is attached to the mounting hole 77. ing.
An upper end portion 83 a of the lock pin 83 is slidably received in the upper guide hole 65, and a lower end portion 83 b of the lock pin 83 is slidably received in the lower guide hole 66.

A grip portion 81 is provided at the distal end portion 74 a of the operation rod 74.
The grip portion 81 is a rod having a circular cross section that extends in the left-right direction (frame width direction) from the distal end portion 74 a of the operation rod 74.
In the operation shaft portion 68, the operation rod 74 and the grip portion 81 are formed in a substantially T shape in plan view.

A cylindrical slider 71 is fitted coaxially to the insertion portion 75 of the operation rod 74.
In the cylindrical slider 71, a base end portion 71a is slidably fitted to a distal end portion 37a of the handle column 37, and a stopper projecting portion 85 projecting radially inward is formed on the distal end portion 71b.
The base end portion 71 a of the slider 71 is slidably fitted to the tip end portion 37 a of the handle column 37, and the stopper overhanging portion 85 is in contact with the flange portion 78.

A compression spring 72 is provided between the leading edge 37 c of the handle column 37 and the stopper overhang 85.
The compression spring 72 is a spring that urges the cylindrical slider 71 in a direction to be inserted into the holding hole 57 of the handle holding portion 41.

The stopper overhanging portion 85 is in contact with the flange portion 78 by the urging force of the compression spring 72.
Further, the upper end portion 83 a of the lock pin 83 is in contact with the rear end portion 66 a of the upper guide hole 65, and the lower end portion 83 b of the lock pin 83 is in contact with the rear end portion 66 a of the lower guide hole 66.
The upper and lower ends 83 a and 83 b of the lock pin 83 abut against the rear ends 66 a and 66 a, respectively, so that the insertion portion 75 of the operation rod 74 can be prevented from coming out of the hollow portion 64 of the handle column 37.

The compression spring 72 is a member that urges the slider 71 in the direction of pulling out from the handle column portion 37 to the pulling position P1 and holds the slider 71 at the pulling position P1.
In a state where the slider 71 is pulled out to the pulling position P1, the slider 71 slightly protrudes rearward from the holding hole 57.

6 is a cross-sectional view taken along line 6-6 of FIG.
The slider 71 and the operating rod 74 are positioned below the opening 58 in the state where the slider 71 is pulled out to the pulling position P1 (that is, the state where the slider 71 is inserted into the holding hole 57).

The outer diameter D1 of the slider 71 is set to be larger than the opening width W of the opening 58.
Therefore, the slider 71 in the holding hole 57 can be prevented from slipping upward from the opening 58 by the protruding portions 54a and 55a of the left and right holding projection pieces 54 and 55.
Thereby, the slider 71 can be held in the holding hole 57.

On the other hand, the outer diameter D <b> 2 of the operation rod 74 is set smaller than the opening width W of the opening 58.
The reason why the outer diameter D2 of the operating rod 74 is set smaller than the opening width W of the opening 58 will be described in detail with reference to FIGS.

7 is a cross-sectional view showing a state in which the slider of the switching operation portion according to the present invention is released from the holding hole, and FIG. 8 is a cross-sectional view taken along line 8-8 in FIG.
When the pressing force acts on the operation shaft portion 68 as shown by the arrow, the operation shaft portion 68 is pushed into the hollow portion 64 of the handle column portion 37 as shown by the arrow against the urging force of the compression spring 72.
Since the flange portion 78 of the operation shaft portion 68 is in contact with the stopper overhanging portion 85 of the slider 71, the slider 71 is pushed to the pushing position P2 while being fitted to the tip end portion 37a of the handle column portion 37.

In this state, the slider 71 is released (disengaged) from the holding hole 57. When the slider 71 is released (disengaged) from the holding hole 57, only the protrusion 76 of the operation rod 74 is accommodated in the holding hole 57.
Here, as described above, the outer diameter D <b> 2 of the operation rod 74 (protrusion 76) is set smaller than the opening width W of the opening 58.
Therefore, the operation rod 74 in the holding hole 57 can be removed upward from the opening 58 as indicated by an arrow.

As described with reference to FIGS. 3 to 8, the switching operation unit 43 includes the slider 71 that is slidably fitted to the handle column 37.
Then, the slider 71 is pushed into the handle column 37 and released (removed) from the holding hole 57 of the handle holding portion 41, and the operation shaft portion 68 (projecting portion 76) can be extracted from the opening 58.
On the other hand, the slider 71 is pulled out from the handle column 37 and inserted into the holding hole 57 of the handle holding part 41 so that the slider 71 can be held in the holding hole 57.

As described above, the release or holding of the slider 71 can be selected by the pushing operation or the drawing operation of the slider 71.
Thereby, it is possible to easily switch between a state in which the handle column portion 37 is used as a lifting grip portion and a state in which it is used as a towing handle portion, and usability can be improved.

Next, an example in which the handle column portion 37 of the transport structure 15 is used as a lifting grip portion will be described with reference to FIGS.
9A and 9B are views for explaining an example in which the slider of the switching operation portion according to the present invention is held in the holding hole, and FIG. 9B is a sectional view taken along the line 9b-9b in FIG.
In (a), pulling the operation shaft portion 68 (specifically, the grip portion 81) of the switching operation portion 43 causes the pull output F2 to act on the operation rod 74 of the operation shaft portion 68 as shown by an arrow.
The insertion part 75 of the operating rod 74 is pulled out from the hollow part 64 of the handle column part 37 as indicated by an arrow A.
The insertion part 75 is pulled out as shown by the arrow A, and the collar part 78 moves in the direction of the arrow A.

Here, a compression spring 72 is provided between the leading edge 37 c of the handle column 37 and the stopper overhanging portion 85.
Therefore, since the urging force of the compression spring 72 acts on the stopper overhanging portion 85 of the slider 71, the slider 71 slides as shown by the arrow A together with the flange portion 78.

As the slider 71 slides as shown by the arrow A, the slider 71 is inserted into the holding hole 57 of the handle holding portion 41 and pulled out to the pulling position P1.
In this manner, by applying the urging force of the compression spring 72 to the slider 71, the urging force of the compression spring 72 can be used for the pulling operation of the slider 71.
Therefore, the drawer operation of the slider 71 can be performed easily.

When the slider 71 is inserted to the drawing position P1, the upper end portion 83a of the lock pin 83 comes into contact with the rear end portion 66a of the upper guide hole 65. At the same time, the lower end 83 b of the lock pin 83 comes into contact with the rear end 66 a of the lower guide hole 66.
Therefore, the slider 71 is held at the extraction position P <b> 1 by the urging force of the compression spring 72.
In this way, the urging force of the compression spring 72 can be used to keep the slider 71 inserted into the holding hole 57, so that the usability can be improved.

In (b), the outer diameter D1 of the slider 71 is set larger than the opening width W of the opening 58.
Therefore, the slider 71 in the holding hole 57 can be prevented from slipping upward from the opening 58 by the protruding portions 54a and 55a of the left and right holding projection pieces 54 and 55.
Thereby, the slider 71 can be held in the holding hole 57.

FIG. 10 is a view for explaining an example in which a portable work machine is lifted and carried by the handle column portion according to the present invention.
By operating the switching operation part 43 and holding the slider 71 in the holding hole 57 of the handle holding part 41, the handle column part 37 can be held on the handle holding part 41 via the switching operation part 43.
On the other hand, left and right end portions 35b, 35c of the handle shaft portion 35 are rotatably supported by the left and right support brackets 33, 34, respectively.
Therefore, the handle column part 37 is disposed substantially parallel to the upper part 11 b at a predetermined interval with respect to the upper part 11 b of the frame 11.

As a result, the portable work implement 10 can be lifted and carried as shown by the arrow B by grasping the handle column 37 with the hand 88.
That is, by holding the handle column 37 in the handle holder 41, it can be used as a lifting grip that lifts and carries the portable work machine 10.

Next, an example in which the handle column portion 37 of the transport structure 15 is used as a traction handle portion will be described with reference to FIGS.
11A and 11B are views for explaining an example in which the slider of the switching operation unit according to the present invention is removed from the holding hole, and FIG. 11B is a sectional view taken along the line 11b-11b in FIG.
In (a), by pressing the operation shaft portion 68 (specifically, the operation rod 74) of the switching operation portion 43, a pressing force F2 acts on the operation rod 74 as shown by an arrow.
When the pressing force F <b> 2 acts on the operation rod 74, the insertion portion 75 of the operation rod 74 is pushed into the hollow portion 64 of the handle column 37 as indicated by an arrow C against the urging force of the compression spring 72.

When the insertion portion 75 is pushed into the hollow portion 64 as indicated by an arrow C, the flange portion 78 presses the stopper overhanging portion 85 of the slider 71 in the direction of the handle column portion 37.
Therefore, the slider 71 is pushed to the pushing position P2 in a state where the slider 71 is fitted to the distal end portion 37a of the handle column 37, and the slider 71 is released (disengaged) from the holding hole 57.

In (b), when the slider 71 (see FIG. 11A) is released (disengaged) from the holding hole 57, only the protrusion 76 of the operating rod 74 is accommodated in the holding hole 57. .
Here, the outer diameter D <b> 2 of the operation rod 74 (protrusion 76) is set smaller than the opening width W of the opening 58.
Therefore, the operation rod 74 (projecting portion 76) in the holding hole 57 can be pulled out from the opening 58 as indicated by the arrow D.

FIG. 12 is a diagram for explaining an example in which a portable work machine is pulled by the handle column according to the present invention.
By pulling out the operating rod 74 (protrusion 76) from the opening 58, the handle column 37 can be swung as shown by the arrow E around the handle shaft 35 and placed at the pulling position P3.

Accordingly, the portable work machine 10 can be pulled forward as indicated by the arrow F by gripping the grip portion 81 of the operation shaft portion 68 with the hand 88.
That is, by arranging the handle column 37 at the towing position P3, it can be used as a towing handle for towing the portable work machine 10.

Here, when the handle column part 37 is used as the traction handle part by providing the grip part 81 extending in the width direction of the frame 11 at the tip part 74a (see also FIG. 4) of the operation rod 74, the grip part 81 can be arranged orthogonal to the pulling direction.
Accordingly, the grip portion 81 can be pulled with the finger 89, and the pulling operation can be easily performed.

  As described with reference to FIGS. 9 to 12, by providing the switching structure 43 in the transport structure 15 of the portable work machine 10, the handle holding part 41 can be held in the handle holding part 41, and the handle holding part 41. The handle post 37 can be switched to a releasable state.

Then, in the state where the handle column 37 is held by the handle holding part 41, the portable work machine 10 can be used as a lifting grip part for lifting and carrying it.
On the other hand, in a state in which the handle column portion 37 is released from the handle holding portion 41, it can be used as a towing handle portion for towing the portable work machine 10.

  As described above, the handle column 37 can also be used as a lifting grip part and a towing handle part, so that the portable work machine 10 can be moved by towing and the portable work machine 10 can be lifted and carried. , The usability can be improved.

Furthermore, since the handle post portion 37 also serves as the lifting grip portion and the traction handle portion, it is not necessary to prepare the lifting grip portion and the traction handle portion individually.
Thereby, simplification and compactification of the portable work machine 10 can be achieved.

In addition, when the handle column part 37 is held by the handle holding part 41, the handle column part 37 is held outside the frame 11 by holding the handle column part 37 substantially parallel to the upper part 11 b of the frame 11. it can.
Therefore, it is not necessary to store the handle column 37 in the frame 11 when the handle column 37 is held by the handle holding unit 41.
Thereby, since the space which accommodates the handle | steering-wheel support | pillar part 37 from the inside of the flame | frame 11 can be removed, the portable work machine 10 can further be simplified and compactized.

Furthermore, when the handle column part 37 is held by the handle holding part 41, the handle column part 37 is held at the upper part 11 b of the frame 11, so that the handle column part 37 is arranged at a position where it can be easily gripped by hand.
Thereby, the operation of holding the handle column part 37 on the handle holding part 41 and the operation of releasing it from the handle holding part 41 can be easily performed.

  In the above-described embodiment, the engine-driven generator is exemplified as the portable work machine 10 to which the present invention is applied. However, the present invention is not limited to this, and can be applied to other portable work machines.

  Moreover, although the said embodiment demonstrated the example which provided the handle shaft part 35 in the upper front end part 11d of the flame | frame 11, and provided the handle holding part 41 in the upper rear end part 11e of the flame | frame 11, it does not restrict to this. The handle holding portion 41 may be provided at the upper front end portion 11d of the frame 11, and the handle shaft portion 35 may be provided at the upper rear end portion 11e of the frame 11.

  Furthermore, although the said embodiment demonstrated the example using the compression spring 72 as an elastic member, it is not restricted to this, It is also possible to use other elastic members, such as a tension spring and a coil spring.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to a portable work machine that includes a towing wheel at the lower part of a frame and can be towed using the wheel.

It is a perspective view which shows the portable work machine which concerns on this invention. It is a disassembled perspective view which shows the conveyance structure of the portable work machine which concerns on this invention. It is sectional drawing which shows the switching operation part of the conveyance structure which concerns on this invention. It is a disassembled perspective view which shows the switching operation part of the conveyance structure which concerns on this invention. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is sectional drawing which shows the state which released the slider of the switching operation part which concerns on this invention from the holding hole. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. It is a figure explaining the example which hold | maintains the slider of the switching operation part which concerns on this invention to a holding hole. It is a figure explaining the example which lifts and carries a portable work machine with the handle | steering-column part which concerns on this invention. It is a figure explaining the example which removes the slider of the switching operation part which concerns on this invention from a holding hole. It is a figure explaining the example which pulls a portable work machine with the handle support | pillar part which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Portable work machine, 11 ... Frame, 11a ... Lower rear end part of frame (lower part of frame), 11b ... Upper part of frame, 11d ... Upper front end part of frame (upper one end part of frame), 11e ... Upper rear end (the other upper end of the frame), 13 ... wheel, 35 ... handle shaft, 37 ... handle post, 37a ... tip of handle post, 41 ... handle holder, 41a ... handle holder Upper part (upper part of holding hole), 43 ... switching operation part, 57 ... holding hole, 58 ... opening part, 64 ... hollow part, 68 ... operation shaft part, 71 ... slider, 71a ... base end part of slider, 71b ... slider 72 ... compression spring (elastic member), 74 ... operating rod, 81 ... grip part, 85 ... stopper overhang part.

Claims (4)

In a portable working machine equipped with a tow wheel at the lower part of the frame and towable using the wheel,
A handle shaft that is rotatably supported at one end of the frame in the width direction of the frame;
A handle column extending from the handle shaft to intersect the handle shaft,
A handle holding portion provided at the other upper end of the frame in order to hold the handle post portion substantially parallel to the upper portion of the frame;
A state in which the handle column can be held in the handle holding unit, a switching operation unit that switches the handle column to a state in which the handle column can be released;
With
In a state where the handle column part is held by the handle holding part, it can be used as a lifting grip part for lifting and carrying the frame.
A portable work machine characterized in that it can be used as a towing handle portion for towing the frame in a state in which the handle column portion is released from the handle holding portion. The switching operation unit
A hollow portion formed coaxially in the handle post portion is provided,
An operating shaft portion that is slidably inserted from the distal end portion of the handle post portion into the hollow portion,
A cylindrical slider is supported in a state of being coaxially fitted to the operation shaft portion, and is slidably fitted to the handle column portion,
The handle holding part is
A holding hole for receiving and holding the slider;
An upper portion of the holding hole is provided with an opening that prevents the slider from being pulled upward and allows the operation shaft portion to be pulled upward.
By pushing the slider into the handle column portion with the operation shaft portion, the slider is released from the holding hole, and the operation shaft portion can be pulled out from the opening,
2. The portable work machine according to claim 1, wherein the slider can be held by being inserted into the handle holding portion by pulling out the slider from the handle column portion by the operation shaft portion. The base end of the slider is slidably fitted to the tip of the handle post,
A stopper projecting portion projecting radially inward is formed at the tip of the slider,
The elastic member which urges | biases in the direction which inserts the said cylindrical slider in the said handle holding part between the front-end | tip part of the said handle | steering-column part and the said stopper extension part is possible. Portable work machine. The operation shaft portion is
The portable working machine according to claim 3, further comprising: an operating rod that can be slidably inserted into the hollow portion; and a grip portion that extends at a distal end portion of the operating rod in the width direction of the frame. .

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