JP5043703B2 - Walking type work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking type working machine enabling a continuous grip operation for a long time by reducing a gripping force of a clutch lever of a handle. <P>SOLUTION: The walking type working machine is equipped with a gripping force reducing body for enabling: a reducing operation for reducing a gripping force of a clutch lever 13 by keeping pressing; and a releasing operation for canceling a reducing operation and a gripping operation of the clutch lever 13 by keeping pressing. The gripping force of the clutch lever necessary for continuing grip operating the clutch lever is reduced while keeping a transmission of a power in a connecting state by reducing operation by pressing a gripping force reducing body, and therefore the physical fatigue of a worker is reduced. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a walking work machine having a clutch lever on a handle.

  Conventionally, as a form of walking-type work machine, an engine is mounted on the fuselage frame, a transmission case extending in the vertical direction is linked to the engine, a handle is attached to the top of the mission case, and power is Some have a clutch lever that connects / disconnects transmission.

The clutch lever pivotally supports the base end of the handle and connects the transmission of power by gripping the tip so as to be close to the handle, while transmitting the power by releasing the gripping operation. Some include a so-called deadman clutch-type clutch lever configured to be disconnected (for example, described in Patent Document 1). This deadman type includes a clutch lever provided above the handle and holding the clutch lever from above, and a clutch lever provided below the handle and holding the clutch lever from below.
JP 2008-11758 A

  However, in the above-described deadman type clutch lever, it is necessary to keep gripping the clutch lever in order to keep the transmission of power in the connected state. Therefore, continuing a tilling operation or the like while holding the clutch lever for a long time has a problem that a physical burden is large. In particular, it becomes difficult for an elderly person or a weak woman or the like to continue working for a long time while holding the clutch lever.

  The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a walking type working machine that can reduce the grip of the clutch lever of the handle and can continue the grip operation for a long time.

According to the first aspect of the present invention, the handle is provided with a clutch lever for connecting / disconnecting transmission of power, and the clutch lever pivotally supports the base end portion of the handle so that the distal end portion is close to the handle side. In a walk-type work machine configured to disconnect power transmission by releasing the gripping operation while reducing the gripping force of the clutch lever by connecting the power transmission by the gripping operation A gripping force reduction body that enables a reduction operation to release and a release operation to release the reduction operation by releasing the pressure, and reduces the holding operation direction of the clutch lever and the holding force of the clutch lever The gripping force reduction body is attached to one end of the lever-shaped reduction body main body that extends in substantially the same direction as the clutch lever. A fulcrum part that becomes a fulcrum that is locked so as to be freely connected and detached is provided, and an action part that is connected to the tip end side of the clutch lever is provided in the middle part of the lightening body main body, The walking-type working machine is characterized in that an operation portion which is disposed on the base end portion side of the clutch lever and serves as a power point is provided at the other end portion .

  (1) In the present invention described in claim 1, since the gripping force of the clutch lever can be reduced by pressing the gripping force reducing body and performing a reduction operation, the operator's physical fatigue can be reduced. it can. In other words, since the physical burden required for gripping the clutch lever (endurance such as gripping force) is reduced, the clutch lever is gripped for a long time even for elderly or weak women. You can work easily. As a result, work efficiency can be improved.

  Also, when an unexpected situation occurs, the clutch lever grip operation is also released by simply releasing the grip force reducing body release operation (for example, releasing your hand from the clutch lever). The transmission of power can be quickly cut off, and the safety can be ensured satisfactorily.

Furthermore , since the clutch lever gripping operation direction and the gripping force reducing body pressing operation direction are substantially the same direction, switching between the two operations can be easily performed by a series of operations. As a result, good operability can be ensured.

In addition, the clutch lever is gripped, the tip of the clutch lever is brought close to the handle, the fulcrum of the gripping force reducing body is locked to the handle, and the operation portion is pressed in the same state. The portion acts on the clutch lever, and the clutch lever can be gripped indirectly and easily by the “lever principle”.

  Further, by releasing the pressing of the operating portion, the fulcrum portion of the gripping force reducing body can be easily detached from the handle, and the indirect gripping operation of the clutch lever can be quickly released.

  Embodiments of the present invention will be described below.

  The walking work machine according to the present invention is provided with a clutch lever for connecting / disconnecting transmission of power to the handle, and the clutch lever pivotally supports the base end portion of the handle, and the distal end portion is close to the handle side. In the walking type work machine configured to disconnect the power transmission by releasing the gripping operation while connecting the power transmission by performing the gripping operation, the clutch lever gripping force can be increased by continuing to press. There is provided a gripping force reduction body that enables a reduction operation to reduce, and a release operation to release a reduction operation and a clutch lever gripping operation by releasing the press.

  The clutch lever gripping operation direction and the pressing operation direction of the gripping force reducing body that reduces the gripping force of the clutch lever are substantially the same direction.

  In addition, the gripping force reducing body is provided with a fulcrum portion that serves as a fulcrum by being engaged with and disengaged from the handle at one side end of a lever-shaped reducing body that extends in substantially the same direction as the clutch lever. In the middle of the body of the lightening body, an action part is provided which is connected to the distal end side of the clutch lever and serves as an action point, and is disposed on the base end side of the clutch lever at the other end of the body of the lightening body. An operation unit is provided as a power point.

  In addition, the gripping force reducing body is provided with a fulcrum portion pivotally supported by the handle at one end of a lever-shaped reducing body extending in substantially the same direction as the clutch lever. In the middle part, there is an action part that is engaged and disengaged on the distal end side of the clutch lever so as to be an action point, and at the other end part of the body of the lightening body, on the proximal end part side of the clutch lever An operation unit that is disposed and serves as a power point is provided.

  Below, the management machine A (walking type work machine) in this embodiment is demonstrated, referring drawings.

  A shown in FIG. 1 and FIG. 2 is a management machine according to the present invention. The management machine A is provided with a prime mover unit 2 on a fuselage frame 1 and is positioned behind the prime mover unit 2 so that the fuselage frame 1 A transmission case 4 extending in the vertical direction is provided at the rear, and a transmission case 3 is interposed between the upper portion of the transmission case 4 and the prime mover unit 2. And while attaching the base end part of the handle | steering-wheel 30 to the upper part of the mission case 4, the tilling part 5 is provided in the lower part of the mission case 4. As shown in FIG. Moreover, the resistance rod 7 and the moving wheels 9 and 9 are attached to the above-described body frame 1 so that the respective use positions can be freely switched. 12 is a rotary cover, 14 is a fuel tank.

  Then, the moving wheels 9 and 9 are attached to the machine body frame 1 via the moving wheel support 11 so as to roll freely, and the earthenware forming body 10 is attached to the moving wheel support 11.

  Below, the structure of each part of the management machine A will be described.

  In the prime mover unit 2, an engine E is mounted on the body frame 1, and a fuel tank 14 is mounted on the engine E. In the figure, 15 is a bumper that also serves as a front weight.

  As shown in FIG. 3, the transmission case 3 includes an output pulley 56 a linked to the drive shaft 45 of the engine E, an input pulley 56 b linked to the input shaft 46 of the mission case 4, and the pulleys 56 a and 56 b. A transmission mechanism 59 comprising a transmission belt 57 wound in a relaxed state and a tension arm 48 acting via a tension roller 47 in the middle of the transmission belt 57 is provided.

  The transmission mechanism 59 includes a tension clutch that connects / disconnects power by tensioning / relaxing the transmission belt 57 with the tension arm 48 to transmit power from the engine E to the transmission case 4. It can also be stopped.

  A clutch lever 13 (described later) is interlocked and connected to the tension arm 48 via a wire 41 so that the tension clutch can be connected and disconnected by operating the clutch lever 13.

  As shown in FIGS. 1 and 2, the mission case 4 is located above the body frame 1 and connected to the transmission case 3 in an interlocking manner, and below the body frame 1, the tiller unit 5. The lower part which forms.

  The cultivating unit 5 is provided with a pipe-shaped cultivating shaft 17 extending in the left-right width direction in a transversely penetrating state at the lower part of the mission case 4, and a plurality of cultivating claws radially attached to the outer peripheral surface of the cultivating shaft 17 The tilling claw is formed of an inner claw 18 and an outer claw 19.

  And the side cover bodies 8 and 8 are detachably attached to the left and right outer ends of the tilling shaft 17, respectively. That is, the side cover bodies 8 and 8 are formed in a disk shape that is slightly curved like a parabona antenna, and a cylindrical mounting portion 36 is projected in a perpendicular state at the center of the convex inner surface. The attachment portion 36 is inserted in the outer end portion of the tilling shaft 17 formed in a pipe shape so as to be freely inserted and removed. Reference numeral 37 denotes a fixing pin that is inserted in a transverse penetrating manner to fix the attachment portion 36 to the tilling shaft 17. In this way, the side cover bodies 8 and 8 prevent the cultivation soil from being scattered outside the left and right outer ends of the cultivation shaft 17.

  The operation unit 6 is provided with an operation unit attachment body 29 extending obliquely rearward at the upper end portion of the mission case 4, and a pair of left and right handles 30 extending outwardly and upwardly via the connecting pin 28 to the operation unit attachment body 29. , 30 are connected to each other, and both the handles 30, 30 are pivoted about the connecting pin 28 so that they can be folded. As shown in FIG. 6, grips 20, 20 are provided at the distal ends of the handles 30, 30, a deadman clutch lever 13 is disposed below the left grip 20, and the grip 20 An engine emergency stop switch 43 is disposed in front of the engine.

  As shown in FIG. 3, the rear part of the machine body frame 1 is provided with transfer means 27 for transferring the resistance rod 7 and the moving wheels 9, 9 to the use position and the non-use position. That is, the transfer means 27 is a pivot pin in which the fixed side portion 50 is fixedly contacted to the rear end portion of the body frame 1 and the upper end portion of the movable side portion 51 is directed to the upper end portion of the fixed side portion 50 with the axis line in the left-right direction. The locking pin 54 provided at the lower end portion of the movable side portion 51 is engaged with the hook portion 53 provided at the lower end portion of the fixed side portion 50 by the transfer lever 34 (shown in FIG. 1). It is made to engage freely. Then, a middle part of the moving wheel support 11 formed in a rear view portal shape is attached to the fixed side part 50 so as to be rotatable around an axis in the left-right direction, while being extended vertically to the movable side part 51 to form a rod. The upper part of the resistance rod 7 formed in the above is attached, and the fixed side part 50 and the middle part of the moving wheel support 11 are interlocked and connected via a transfer link mechanism 55. Here, the moving wheels 9 and 9 are attached to the left and right lower end portions of the moving wheel support 11 via the rolling shafts 26 and 26 having the axis line in the left-right direction so as to freely roll.

  In this way, at the use position where the moving wheels 9 and 9 are grounded and rolled, the resistance rod 7 jumps upward and becomes a non-use position, and the lower end portion of the resistance rod 7 penetrates into the ground. In the use position, the transfer wheels 34 can be appropriately switched by operating the transfer lever 34 so that the movable wheels 9 and 9 are in a non-use position that is flipped upward.

  In the configuration as described above, the gist of the present invention is that the handle 30 is provided with the clutch lever 13 for connecting / disconnecting transmission of power, and the clutch lever 13 is continuously pressed to reduce the gripping force of the clutch lever 13. The gripping force reducing body 60 is provided that enables the reduction operation to be performed and the release operation to release the gripping operation of the clutch lever 13 by releasing the pressing. This will be described below with reference to FIGS.

  As shown in FIG. 4 to FIG. 6, a grip portion 20 that an operator grips is provided at the distal end portion of the handle 30, and a lever mounting body 84 is suspended from a portion of the handle 30 that is positioned immediately before the grip portion 20. The clutch lever 13 is mounted on the lever mounting body 84. 65 is a fastener and 63 is a bolt.

  The clutch lever 13 pivotally supports the base end portion 67 of the lever main body 61 via the connecting pin 66 on the lever mounting body 84 and extends the lever main body 61 rearward so that the lower side of the grip portion 20 Is arranged. A projecting portion 69 projecting downward is provided at the base end portion 67 of the lever main body 61, and the tension arm 48 is linked to the projecting portion 69 via the wire 41. Reference numeral 64 is a wire insertion hole, and 68 is a connecting pin.

  In this way, by continuing to hold the lever body 61, the wire 41 is pulled and the tension arm 48 is continuously pressed against the transmission belt 57, and the transmission belt 57 is held in a tensioned state, that is, in a power connection state, while the lever body. By releasing the grip of 61 (removing the hand), the power is cut off, and the tiller 5 can be stopped. The tension arm 48 is elastically biased by an elastic means such as a tension spring in a direction in which the transmission belt 57 is relaxed. Accordingly, when the gripping operation is released, the clutch lever 13 is restored to the posture before the gripping operation is quickly performed by the elastic means, and the clutch is disengaged.

  The clutch lever 13 is provided with a gripping force reducing body 60 (auxiliary clutch), and the gripping force reducing body 60 is configured to reduce the gripping force of the clutch lever 13 by continuing to press, The release operation enables the reduction operation and the release operation to release the clutch lever 13 gripping operation.

  That is, the gripping force reducing body 60 has a rear portion 71, which is an intermediate portion of the lever-shaped reducing body main body 62 extending in the front-rear direction along the upper surface of the lever main body 61. The front end portion 70 and the rear end portion 74 of the lightening body main body 62 are swingable up and down around the rotation pin 73.

  The front end 70, which is the other end of the lightening body main body 62, is provided with an operation portion 83 that bulges downward, and the operation portion 83 is vertically moved to a position close to the protrusion 69 of the lever main body 61. It protrudes in a vertically movable manner from a projecting hole 77 that is opened by penetrating in the direction.

  Thus, the gripping direction (upward direction) of the gripping portion 78 of the clutch lever 13 and the pressing operation direction (upward direction) of the front end portion 70 of the gripping force reducing body 60 are substantially the same direction. Switching between the two operations is facilitated by a series of actions.

  A rear end portion 74 that is one side end portion of the lightening body main body 62 is formed to protrude rearward and upward from the front end portion 72 of the lever main body 61, and a lever auxiliary member 75 is provided at the rear end portion of the handle 30. The rear end portion 74 is engaged with and disengaged from the engagement receiving piece 76 that is suspended through the engagement receiving piece 76. Here, since the rear end portion 74 does not interfere with the locking receiving piece 76 when the lever body 61 is rotated upward, the rear end portion 74 does not interfere with the operation of the lever body 61, while pressing the operation portion 83. Thus, when the rear end portion 74 is lowered, the engagement receiving piece 76 can be engaged with the rear end portion 74 from above.

  In this way, the rear end portion 74 of the gripping force reducing body 60 is formed as a fulcrum portion 81 serving as a fulcrum for the lever principle, and the rear portion 71 of the reduction body main body 62 connected to the distal end portion 72 of the clutch lever 13 is provided. The action portion 82 serving as the action point of the “lever principle” is provided, and the front end portion 70 of the lightening body main body 62 is provided as the operation part 83 serving as the force point of the “lever principle”.

  Next, a method for pressing and releasing the clutch lever 13 by the gripping force reducing body 60 will be described. First, the operator grips the lever main body 61 of the clutch lever 13 together with the grip portion 20, thereby rotating the lever main body 61 upward (FIG. 4 → FIG. 5).

  At this time, the lever main body 61 is rotated to a position that is substantially horizontal with the grip portion 20, so that the rear end portion 74 of the gripping force reducing body 60 is positioned above the locking receiving piece 76 as shown in FIG. To be located.

  Thereafter, as shown in FIG. 6, by pressing the operation portion 83 of the gripping force reducing body 60 in the B direction, the rear end portion 74 of the gripping force reducing body 60 is moved upward (in the C direction) to the locking receiving piece 76. ) To be engaged.

  At this time, the pressing operation of the operation unit 83 can be performed with two or three fingers (for example, the thumb and index finger or the thumb and index finger and middle finger) of the five fingers holding the lever body 61. The switching from the gripping operation of the clutch lever 13 to the pressing operation of the operation unit 83 can be smoothly performed by a series of operations.

  Then, by continuing to press the operating portion 83 in the same state, the operating portion 82 acts on the clutch lever 13, and the clutch lever 13 is easily gripped and operated by the “lever principle”, that is, the clutch is engaged. Can be held. Therefore, even if the clutch lever 13 is not directly gripped, the lever 83 can be easily gripped simply by pressing the operating portion 83 with two or three fingers and indirectly gripping the clutch lever 13. The operating state can be continued.

  Further, when the pressing operation of the operation portion 83 is released, the rear end portion 74 of the gripping force reducing body 60 that is locked to the locking receiving piece 76 of the handle 30 is easily released upward and released. At the same time, the clutch lever 13 is restored and the clutch is disengaged, and the driving of the tillage unit 5 can be stopped quickly.

  As a modification example of the present embodiment, the gripping force reducing body 60 is provided below the grip portion 20 of the handle 30 together with the clutch lever 13, but can also be provided above the grip portion 20. That is, the clutch lever 13 and the gripping force reducing body 60 shown in FIGS. 4 to 6 can be inverted 180 degrees around the handle 30 and provided above. Further, by providing the gripping force reducing body 60 and the like above the handle 30, the work can be facilitated by pressing the gripping portion of the gripping force reducing body 60 with the thumb.

  As another embodiment, although not shown, the gripping force reducing body 60 is pivotally supported by the handle 30 on a rear end portion 74 of a lever-like reducing body main body 62 extending in substantially the same direction as the clutch lever 13. The fulcrum part 81 is provided as a fulcrum, and the action part 82 is provided on the rear part 71 of the lightening body main body 62 so as to be engaged and disengaged on the distal end part 72 side of the clutch lever 13 to be an action point. An operation portion 83 that is disposed on the base end portion 67 side of the clutch lever 13 and serves as a power point can be provided on the front end portion 70 of the lightening body main body 62.

  That is, the rear end portion 74 of the lightening body main body 62 is pivotally supported on the handle 30 by the rotation pin 73 to provide a fulcrum portion 81 serving as a fulcrum. In addition, an action portion 82 that protrudes downward from the lightening body main body 62 is formed in the middle of the lightening body main body 62. The front end portion 70 of the lightening body main body 62 has the same structure as the operation portion 83 described above.

  In this way, the clutch lever 13 is turned upward, and the front end portion 72 of the clutch lever 13 is brought into contact with and engaged with the action portion 82 provided in the middle portion of the lightening body main body 62. In this state, the operation unit 83 is pressed.

  Then, the action part 82 acts on the front end part 72 of the clutch lever 13, and the clutch lever 13 can be easily gripped by the “lever principle”.

  As a result of the above, the clutch lever 13 is indirectly brought into a gripping operation state by merely pressing the operating portion 83 of the gripping force reducing body 60 with a slight pressing force of two or three fingers, thereby transmitting power. Can be kept connected. Therefore, the worker's physical fatigue can be reduced. In other words, since the physical burden on the operation of the clutch lever 13 is small, even an elderly person or a weak woman or the like can easily perform work even while holding the clutch lever 13 for a long time. As a result, work efficiency can be improved.

  Further, when an unexpected situation occurs, the clutch lever 13 can be quickly restored and the transmission of power can be quickly cut off by simply releasing the pressing operation, thereby ensuring good safety. be able to.

It is a side view which shows the whole structure which attached the earthenware formation body to the moving wheel of the walk type work machine in embodiment of this invention. It is a top view which shows the whole structure which attached the earthenware formation body to the moving wheel of the walk type work machine in embodiment of this invention. It is the side view which expanded a part of the state which attached the ridger formation body to the moving wheel of the walk type work machine in embodiment of this invention. It is a side view which shows the state which grasped the clutch lever of the walk type work machine in embodiment of this invention. It is a side view which shows the state which hold | maintained the clutch lever of the walk type work machine in embodiment of this invention. It is a side view which shows the state which released the grip of the clutch lever of the walk-type working machine in embodiment of this invention.

Explanation of symbols

A management machine (walking type work machine)
13 Clutch lever 30 Handle 60 Gripping force reducing body 62 Reduction body main body 67 Base end portion 81 Support point portion 82 Acting portion 83 Operating portion

Claims (1)

The handle is provided with a clutch lever for connecting / disconnecting transmission of power, and the clutch lever is pivotally supported by the base end portion of the handle, and the grip lever is operated so as to bring the tip end close to the handle side. In the walking type work machine configured to disconnect the transmission of power by releasing the gripping operation while connecting the transmission,
A gripping force reduction body that enables a reduction operation to reduce the gripping force of the clutch lever by continuing to press and a release operation to release the reduction operation by releasing the pressure ,
The clutch lever grip operation direction and the grip force reduction body pressing operation direction for reducing the clutch lever grip force are substantially the same direction,
The gripping force reducing body is provided with a fulcrum portion that serves as a fulcrum by being engaged with and disengaged from the handle at one end of a lever-shaped reducing body that extends in substantially the same direction as the clutch lever. In the middle part of the lightening body, an action part that is connected to the tip of the clutch lever is provided as the action point, and the power point is arranged at the base end part side of the clutch lever at the other end of the lightening body. A walk-type work machine characterized by having an operation section .

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