JP2782321B2 - Backpack type power working machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various backpack type power working machines such as backpack type reapers and backpack pruners.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned backpack type working machine has a configuration in which an engine having a fuel tank is attached to a backpack frame.

As such a backpack type working machine, for example, Japanese Utility Model Laid-Open No. 3-9126 discloses a working machine as shown in FIG.

[0004] That is, an engine mount 7 is mounted on a lower frame 3 a of a backpack base 3 having a cushion member 4 and a backpack band 5 via a vibration isolating mechanism 6. A fastening bolt 8 and a rotation support member 8a
The fuel tank 2 is rotatably mounted via the.
The engine body 1 is mounted on the upper part of the fuel tank 2.

[0005] In the working machine having such a configuration, when a mowing operation or a pruning operation is performed, when the operation rod (not shown) is swung while the backrest base 3 is fixed to the back by the backrest band 5, the engine body is adjusted accordingly. Since the fuel tank 1 and the fuel tank 2 rotate on the engine mount 7, these operations can be performed smoothly.

Further, since the engine body 1 is mounted on the upper part of the engine mount 7 via the vibration isolating mechanism 6, the vibration from the engine body 1 is attenuated by the vibration isolating mechanism 6.

[0007]

However, in the conventional working machine described above, the engine mount 7 is mounted on the lower frame 3a of the backrest mount 3 via the vibration isolating mechanism 6, and the fastening bolt 8 is mounted on the upper portion of the engine mount 7. Since it is necessary to mount the fuel tank 2 and the engine body 1 via the same, there is a problem that the number of parts increases and the number of assembling steps increases.

Further, since the backrest rack 3 and the engine rack 7 are made of metal to increase rigidity, they not only hinder weight reduction but also hinder cost reduction. Has become.

Further, since the engine body 1 is rotatably mounted on the engine mount 7 via the fuel tank 2 via the fuel tank 2, the center of gravity of the working machine is at a high position of the backrest mount 3, and the fastening bolt In the rotation support structure via the rotation support member 8 and the rotation support member 8a, the rotation support of the engine body 1 may not be maintained in a stable state. When shaking, various operations may not be performed smoothly.

The present invention has been made in view of such circumstances, and a backpack type that can reduce the number of parts and the number of assembling steps, reduce weight and cost, and facilitate various operations. It is intended to provide a power working machine .

[0011]

According to a first aspect of the present invention, there is provided a backpack type power working machine comprising a cylindrical body having a vertical axis and having an upper flange and a lower flange. 10 is removably attached to the upper or lower side of the engine body 20 via a vibration isolating member 90, and the trunk 15 including the upper flange 11 and the lower flange 12 of the fuel tank 10 is attached to the frame of the backpack frame 30. 30A
The storage portion 40 having upper and lower locking grooves 41 and 42 provided on the rear side of the housing is rotatably housed around the vertical axis.

In the backpack type power working machine according to the second aspect, the upper flange 11 and the lower flange 1 of the fuel tank 10 are provided.
3 of the backpack frame 30 provided on the back side with a housing portion 40 having upper and lower locking grooves 41, 42 for housing the body portion 15 including the
0A has a protrusion 31 protruding from the front side of the frame body 30A so that through holes 32 to 35 are provided at the four corners thereof, and a backpack band 50 is inserted through these through holes 32 to 35. The backpack band 50 bridged between the upper through-holes 32 and 33 and between the lower through-holes 34 and 35 of the frame 30A is a backrest 51 and a waistrest 52. It is characterized by the following.

[0013]

In the backpack type power working machine of the present invention, the fuel tank 10 having the cylindrical body 15 having the vertical axis and having the upper flange 11 and the lower flange 12 is mounted on the upper side of the engine body 20. Alternatively, the body part 15 including the upper flange 11 and the lower flange 12 of the fuel tank 10 is detachably attached to the lower side via a vibration isolating member 90 and the backpack frame 3
The upper and lower locking grooves 41, 4 provided on the back side of the frame 30A.
The vibration from the engine body 20 is attenuated by the vibration isolating member 90 and the swinging operation of the operating rod during operation is performed. Is caused by the rotation of the fuel tank 10 rotatably housed in the housing portion 40 and the locking grooves 41 and 42.
Unlike the related art, the vibration isolator 6 provided on the lower frame 3a of the backpack rack 3 and the engine mount 7 mounted via the vibration isolator 6 are not required.

Further, in the backpack type power working machine of the present invention, the upper flange 11 and the lower flange 12 of the fuel tank 10 are provided.
30 of a backpack frame 30 provided on the back side with a housing portion 40 having upper and lower locking grooves 41, 42 for housing a body portion 15 including
A has a protrusion 31 protruding from the front side of the frame 30A so that through holes 32 to 35 are provided at four corners thereof, and a backpack band 50 is inserted through these through holes 32 to 35. The backpack band 50 bridged between the upper through-holes 32 and 33 and between the lower through-holes 34 and 35 of the frame 30A is a backrest 51 and a waistrest 52. Therefore, the cushion function can be provided to the backpack band 50, so that the cushion member 4 is not required unlike the related art, and the mounting bracket for mounting the cushion member 4, the mounting bracket for mounting the backpack band 5, and the like. Becomes unnecessary.

[0015] Therefore, the number of components required by the conventionally required various components is greatly reduced, so that the number of parts is reduced. The reduction in the number of components inevitably reduces the number of assembling steps. Engine mount 7
Since this is unnecessary, not only the weight can be reduced in accordance with the reduction in the number of parts, but also the cost can be reduced. Further, since the rotation fulcrum of the engine body 20 is provided by the rotation of the fuel tank 10 rotatably housed in the housing part 40, the engine body 2 is swung by the operation rod during the operation.
Since the rotation of 0 is stable, various operations can be performed smoothly.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 4 show an embodiment of a backpack type engine used in a backpack type power working machine according to the present invention. As shown in these figures, the backpack engine has
A fuel tank 10, an engine body 20, and a backpack frame 30 are provided. The fuel tank 10 and the backpack frame 30 are made of plastic. The engine body 20 is partially made of plastic.

The body 15 of the fuel tank 10 is formed in a cylindrical shape having a vertical axis, and the engine body 20 is rotatable in the horizontal direction about the vertical axis by an engagement mode described later. I have. An upper flange 11 and a lower flange 12 are provided on the upper and lower portions of the body portion 15. Above the upper flange 11, a substantially cubic head 16 is provided. On the opposite side of the head 16, an engagement protrusion 14 is provided to protrude in the horizontal direction.
A rubber anti-vibration member 90 is fitted to each engagement protrusion 14.

The vibration isolating member 90 has a fitting concave portion 91 corresponding to the outer diameter of the engaging protrusion 14, a fitting convex portion 92 forming the fitting concave portion 91, and a flange portion 93 serving as a stopper.
Is provided.

A lubrication port 1 to which a cap 120 is detachably attached is provided on a side portion between the engagement projections 14 of the head portion 16.
3 are provided. At the top of the head 16, a fuel pipe 130 with an oil filter 131 attached to the tip is provided.
And holding member 1 for holding fuel return pipe 140
7 is attached.

The fan casing 25 of the engine body 20
And the casing 27 are fastened to the front crankcase 29a and the rear crankcase 29b via fastening bolts 80, respectively.
Mounted on

A flexible shaft 100 is attached to the fan casing 25 via a power take-out portion 24. At the free end of the flexible shaft 100, an operating rod having a cutting blade, a pruning blade, or the like attached to the tip (not shown) is detachably attached.

Around the fan casing 25, a plug cover 20A, an air cleaner 21, and a muffler 22 are provided. An exhaust port 27A and a recoil starter 23 are provided on the casing 27 side.

The fan casing 25 and the casing 27
At the lower end of are provided fitting holes 26 and 28 into which the fitting protrusions 92 of the vibration isolating member 90 are fitted.
In this example, the case where the fitting ports 26 and 28 are formed at the lower end portions of the fan casing 25 and the casing 27 has been described. However, the present invention is not limited to this example.
The lower ends of the casing 5 and the casing 27 may be formed separately from the fan casing 25 and the casing 27, and these lower ends may be attached to the lower portions of the fan casing 25 and the casing 27 during assembly. Also, only the lower end side of the casing 27 is
And may be attached separately to the lower portion of the casing 27 during assembly.

On the back side of the frame 30A of the backpack frame 30, a fuel tank holding portion 38 is provided. The fuel tank holding section 38 is provided with a tank housing section 40 corresponding to the shape of the fuel tank 10. A locking groove 41 for locking the upper flange 11 of the fuel tank 10 is provided in the tank housing 40.
And a locking groove 42 for locking the lower flange 12.

When the fuel tank 10 is housed in the tank housing 40, the fuel tank 10 is rotatable inside the tank housing 40. After the fuel tank 10 is accommodated in the tank accommodating portion 40, the lid portion 60 having the receiving portion 61 adapted to the shape of the body portion 15 of the fuel tank 10.
Is fixed by the four fixing bolts 70, so that the fuel tank 10 is prevented from being detached from the tank housing 40.

Further, by interposing an elastic member (not shown) between the body portion 15 of the fuel tank 10 and the tank accommodating portion 40, fuel is injected into the fuel tank 10 and the body portion 1 is formed.
Even when 5 is swelled, the swelling is absorbed by the interposed elastic member, so that unnecessary sliding contact between the body 15 and the tank housing 40 is avoided.
Incidentally, the body 15 of the fuel tank 10 and the tank housing 4
By applying grease which is a lubricant to the surface of the elastic member interposed between the fuel tank 10 and the fuel tank 10, the rotation of the fuel tank 10 becomes smoother.

At the four corners of the frame 30A on the front side of the backpack frame 30, projecting portions 31 are provided to project in a direction substantially orthogonal to the frame 30A. Each projecting portion 31 has through holes 32 to 35
Are formed. In addition, in the protruding portion 31, the case where the protruding portion is provided at the four corners of the frame 30A is illustrated. However, the present invention is not limited thereto, and the protruding portions 31, 31 on the right side in FIG. The remaining protruding portions 31 on the left side of FIG. 1 may also protrude integrally.

A backpack band 50 is provided in each of the through holes 32-35.
Is inserted. Buckles 110 are attached to both ends of the backpack band 50. By the buckle 110, the length of the backpack band 50 is adjustable. When the backpack band 50 is inserted through the through holes 32 to 35, the backpack band 50 between the through holes 32 and 33 serves as a backrest 51, and the space between the through holes 34 and 35 serves as a waist support 52. ing.

Therefore, when the backpack frame 30 is carried on the back, gaps formed by the respective projecting portions 31 are formed between the frame 30A of the backpack frame 30 and the back portion 51 and the waist portion 52 of the backpack band 50. As a result, each back portion 51 and waist portion 52 serve as a cushion.

Subsequently, a method of assembling the backpack type engine having such a configuration will be described. First, as shown in FIG.
7, the casing 27 is removed from the rear crankcase 29b side, and the head 1 of the fuel tank 10 is removed.
After the rubber vibration isolating member 90 is fitted to the engaging protrusion 14 of FIG.
5 and fitting holes 26 and 28 formed at the lower end of the casing 27. After that, the fastening bolt 80 of the casing 27 is tightened to bring the assembly state.

As a result, the fuel tank 10 is elastically held on the engine body 20 side via the vibration isolating member 90. After completing the assembly of the fuel tank 10 and the engine body 20,
These fuel tank 10, engine body 20 and backpack frame 3
Assemble with 0. That is, as shown in FIG. 4, the upper flange 11 and the lower flange 12 of the fuel tank 10 are fitted and locked in the locking grooves 41 and 42 of the tank accommodating portion 40 of the fuel tank holding portion 38.

At this time, the fuel tank 1 of the fuel tank 10
In this case, as described above, the fuel is injected into the fuel tank 10 and the body 15 is inflated by interposing an elastic member (not shown) between the body 15 and the tank housing 40. Also, the bulge is absorbed by the interposed elastic member, and unnecessary sliding contact with the tank housing portion 40 is avoided.

After the fuel tank 10 has been fitted into the tank housing 40, the lid 60 is pressed against the side surface of the tank housing 40, and the cover 60 is fixed to the tank housing 40 by four fixing bolts 70. Fix with. Thereby, the detachment of the fuel tank 10 from the tank housing portion 40 is prevented, and the attachment of the fuel tank 10 and the engine body 20 to the backpack frame 30 is completed.

After the attachment of the fuel tank 10 and the engine body 20 to the backpack frame 30 is completed, the through holes 32 to 35 of the respective projecting portions 31 projecting from the four corners of the frame 30A of the backpack frame 30 are provided. On the other hand, the backpack band 50 is inserted. At this time, the back rest part 51 and the waist rest part 52 between the through holes 32 and 33 and between the through holes 34 and 35 are separated from the front part of the frame 30A, and the backpack band 50 is mounted. This allows
As described above, gaps are formed by the respective projecting portions 31 between the frame 30A of the backpack frame 30 and the backrest 51 and the waistback 52 of the backpack band 50. The back portion 51 and the waist portion 52 serve as a cushion.

After the attachment of the backpack band 50 to the backpack frame 30, the flexible shaft 100 attached to the fan casing 25 side of the engine body 20 is
Is connected to an operating rod on which a cutting blade or a pruning blade suitable for the purpose of work is attached.

After the connection of the operating rods is completed, the manual pump (not shown) is pushed in several times to feed the fuel inside the fuel tank 10 to the engine body 20 side, and then the recoil starter 23 is operated to start the backpack type engine. .

After the backpack type engine is started, the backpack frame 3
By carrying 0, and closing the buckle 110, the backpack frame 30 is fixed to the back. At this time, since each of the backrest portion 51 and the waistrest portion 52 serves as a cushion, the transmission of vibration from the engine 20 is reduced as much as possible, and the degree of fatigue for the worker is reduced.

Also, during operation, when the operating rod is operated to swing the cutting blade, the pruning blade, or the like, the engine body 2 is rotatable in the fuel tank 10 which is rotatable in the tank accommodating portion 40.
Since the 0 is connected, the engine body 20 rotates in conjunction with the operation of the operating rod, so that the operation is performed smoothly.

As described above, in the present embodiment, the cylindrical fuel tank 10 is detachably attached to the engine body 20 via the vibration isolating member 90, and the trunk 15 of the fuel tank 10 is attached to the frame of the backpack frame 30. Vibration from the engine body 20 is attenuated by the vibration isolating member 90 and accompanies the swinging movement of the operating rod during the work, since the housing is rotatably housed in the housing portion 40 provided on the back side of the body 30A. Since the rotation of the engine body 20 is effected by the rotation of the fuel tank 10 rotatably housed in the housing section 40, the vibration isolating mechanism provided on the lower frame 3a of the backrest rack 3 as in the related art. 6 and the engine mount 7 attached via the vibration isolating mechanism 6 are not required.

Projections 31 are projected from four corners on the front side of the frame 30A of the backpack frame 30, and the backpack band 50 is inserted into through holes 32 to 35 formed in the protrusions 31 to thereby form the frame 30A. The backpack band 50 bridged between the upper through-holes 32 and 33 and between the lower through-holes 34 and 35 is used as the backrest 51 and the waistback 52.
0 can be provided with a cushioning function, so that not only the cushion material 4 is not required as in the related art, but also a mounting bracket for mounting the cushioning material 4 and a mounting bracket for mounting the backpack band 5 are not required. .

Therefore, the number of components is reduced because the various components required conventionally are greatly reduced, and the number of components is inevitably reduced due to the reduction in the number of components. Engine mount 7
Since this is unnecessary, not only the weight can be reduced in accordance with the reduction in the number of parts, but also the cost can be reduced. Further, since the rotation fulcrum of the engine body 20 is provided by the rotation of the fuel tank 10 rotatably housed in the housing part 40, the engine body 2 is swung by the operation rod during the operation.
Since the rotation of 0 is stable, various operations can be performed smoothly.

In this embodiment, the backpack type engine used in the backpack type power working machine of the present invention is mounted on the fuel tank 10.
A case where the present invention is applied to a type in which the engine body 20 is mounted on the upper part of the fuel tank 10 has been described. However, the present invention is not limited to this example. For example, as shown in FIG. May be applied. In this case, the arrangement position of the fuel tank holding portion 38 is changed, and the arrangement position of the oil supply port 13 of the fuel tank 10 is changed. In addition, the engine body 20 may be a so-called inverted engine whose direction is changed by 180 degrees in FIG.

[0043]

As described above, according to the backpack type power working machine of the present invention, the cylindrical body 15 having the vertical axis and the upper flange 11 and the lower flange 12 is provided.
The fuel tank 10 provided with the fuel tank 10 is detachably attached to the upper side or the lower side of the engine body 20 via a vibration isolating member 90. The housing portion 40 having upper and lower locking grooves 41 and 42 provided on the back side of the frame 30A
The vibration from the engine main body 20 is attenuated by the vibration isolating member 90 and the engine main body 20 accompanying the swinging operation of the operating rod during the operation. Is caused by the rotation of the fuel tank 10 rotatably accommodated in the accommodating portion 40 and the locking grooves 41 and 42, and thus is provided on the lower frame 3 a of the backrest base 3 as in the related art. Anti-vibration mechanism 6
Also, the engine mount 7 attached via the anti-vibration mechanism 6 becomes unnecessary.

In the backpack type power working machine of the present invention, the upper flange 11 and the lower flange 12 of the fuel tank 10 are provided.
30 of a backpack frame 30 provided on the back side with a housing portion 40 having upper and lower locking grooves 41, 42 for housing a body portion 15 including
A has a protrusion 31 protruding from the front side of the frame 30A so that through holes 32 to 35 are provided at four corners thereof, and a backpack band 50 is inserted through these through holes 32 to 35. The backpack band 50 bridged between the upper through-holes 32 and 33 and between the lower through-holes 34 and 35 of the frame 30A is a backrest 51 and a waistrest 52. Therefore, the cushion function can be provided to the backpack band 50, so that the cushion member 4 is not required unlike the related art, and the mounting bracket for mounting the cushion member 4, the mounting bracket for mounting the backpack band 5, and the like. Becomes unnecessary.

Therefore, the various components conventionally required are greatly reduced, so that the number of components is reduced, and the number of components is reduced, which inevitably reduces the number of assembly steps. Since the engine mount 7 and the like are not required, not only the weight can be reduced in addition to the reduction in the number of parts, but also the cost can be reduced. Furthermore,
Since the rotation fulcrum of the engine 20 is provided by the rotation of the fuel tank 10 rotatably housed in the housing portion 40, the rotation of the engine 20 associated with the swinging operation of the operating rod during work is stabilized. Various operations are performed smoothly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a backpack type power working machine equipped with an engine of the present invention.

FIG. 2 is a partially cutaway view showing a locked state between the fuel tank and the engine in FIG. 1;

FIG. 3 is an exploded perspective view showing the fuel tank and the engine of FIG. 1;

FIG. 4 is an exploded perspective view showing the backpack type engine of FIG. 1;

FIG. 5 is an exploded perspective view showing another embodiment in which the configuration of the backpack type engine of FIG. 1 is changed.

FIG. 6 is a view showing a conventional backpack type working machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fuel tank 15 Body 20 Engine main body 25 Fan casing 27 Casing 30 Backpack frame 30A Frame 38 Fuel tank holding section 40 Tank storage section 31 Projection section 32 to 35 Through hole 50 Backpack band 51 Backrest section 52 Hip rest 90 Protection Vibration member 100 Flexible shaft

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI A01M 9/00 A01G 3/03 E

Claims (2)

(57) [Claims] 1. An upper flange 11 having a vertical axis.
And a fuel tank 10 having a cylindrical body 15 provided with a lower flange 12 on the upper side of the engine body 20 or
Is attached detachably via the vibration isolating member 90 on the lower side, the upper flange 11 and a lower furan of the fuel tank 10
The body portion 15 comprising a di-12, housing portion 4 having a locking groove 41 in the vertical provided on the rear side of the frame body 30A of the backpack frame 30
0. A backpack type power working machine characterized by being housed in the housing 0 so as to be rotatable about the vertical axis. 2. An upper flange 11 of the fuel tank 10.
Up and down to accommodate the torso 15 including the lower flange 12
The frame body 30A of the backpack frame 30 provided with the receiving portion 40 having the locking grooves 41 and 42 on the back side has through holes 32 to 3 at four corners thereof.
5 is provided so as to protrude from the front side of the frame 30A, and the through holes 32 to 35 are provided.
The backpack band 50 bridged between the upper through-holes 32 and 33 and between the lower through-holes 34 and 35 of the frame 30A is provided with a backrest band. 2. The backpack type power working machine according to claim 1, wherein the backpack type power working machine includes a waist support portion 51 and a waist pad portion 52.