JPH0224422Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vibration-proof backpack frame structure for a backpack-type power working machine, in which a pair of backpack bands are connected to a backpack frame equipped with a prime mover.

[Conventional technology]

Conventionally, the Jikko Sho 61-
In the No. 28 publication, a spring material made of a coil spring or a torsion coil spring is provided between the upper part of the backpack frame and the upper part of the backpack band, and the lower part of the backpack band is folded back to the attachment part of the lower part of the backpack frame and sewn or sewn. It is a stopper.

[Problem that the invention attempts to solve]

With such a conventional structure, the vibration of the prime mover is transmitted through the lower part of the backpack strap, resulting in insufficient vibration isolation, and the worker's clothing gets caught in the upper spring material, making it difficult to remove the backpack frame. Another problem is that the effective length of the backpack band cannot be adjusted according to the physique of the worker.

The present invention solves such problems, and has excellent vibration-proofing effects, allows for good adjustment of the effective length of the backpack strap, and also makes the backpack strap sturdy, connectable, and easy to remove. The present invention provides a simple structure that can be easily implemented.

[Means for solving problems]

Therefore, in the present invention, locking devices are fixedly installed on both sides of the upper and lower parts of the vertical part of the backpack frame, and a band-shaped vibration isolator is bent and engaged with the upper locking device, and the outer circumference of the vibration isolator is The upper end of the knapsack band is folded larger than that, and each end is attached to the knapsack band, and the lower end of the knapsack band is folded back and hooked to the hook body that can be hooked to and removed from the lower locking device. In addition, a buckle for changing the effective length is interposed in the folded and overlapping portion of the lower end of the shoulder strap.

[Effect]

Therefore, a band-shaped vibration isolator is installed on the upper side of the backpack band, and a cylindrical vibration isolator is installed on the lower side, so that the vibration of the motor is less likely to be transmitted to the backpack band side due to the vibration isolation effect. This means that you can easily carry it on your back, and by removing the lower hook body, you can easily remove the fuselage.

〔Example〕

Next, the embodiment shown in the drawings will be described.

FIG. 1 shows a side view of a backpack-type brush cutter, in which a motor 1 rotatably supported by a support 13 is installed on the horizontal part 11 of a backpack frame 10 whose side surface is approximately L-shaped. There is a backrest 14 on the front of the vertical part 12.
is stretched, and the tip of the flexible transmission pipe 3 extending from the clutch case 2 of the prime mover 1 is connected to the operating rod 5.
The operating rod 5 has grips 6, 6 at its rear end and is transmission connected to the rear end thereof through a joint 4. The tip of the operating rod 5 is transmission connected to a gear case 7 for driving a cutting blade 8, so that the structure is similar to the conventional structure.

At the upper part of the vertical part 12 of the backpack frame 10, there is an extending part 12 which is shaped like a loop and bent upward to the motor 1.
a, and a rod fastener 16 bent from the center and elongated horizontally is fixed above the distal end side of the extending part 12a, and on both sides of the lower part of the vertical part 12 of the backpack frame 10, respectively. Both plate fasteners 2 with horizontal holes
0 and 20 are fixedly installed so as to protrude forward.

There is a shoulder rest 2 in the middle part of both backpack bands 15, 15.
5 are joined together, and the upper ends 15a of both backpack bands 15, 15 are folded back, and the band-shaped vibration isolator 17 is folded back and engaged with the locking tool 16, and the upper end of the backpack bands 15 is folded back. 15a is bent to a larger size and superimposed on the outer circumferential side of the belt-shaped vibration isolator 17, and as shown in FIG.
Washers 18, 18 are joined to the outer surfaces of the tips of the upper end portion 15a and the upper end portion 15a, and bolts and nuts 19 are inserted therein.

Further, a cylindrical vibration isolator 22 is fitted into the horizontal shaft portion 21b of the hook body 21, which has a hook 21a that can be detachably engaged with the horizontal hole of the locking tool 20. The lower end portion 15b of the backpack band 15 is folded back and engaged, a presser ring 23 is fitted to the portion of the band that is folded back and overlapped near the vibration isolator 22, and a presser ring 23 is fitted to the overlapping portion of the band near the presser ring 23. is formed by engaging a buckle 24 for changing the effective length of the band.

Therefore, when carrying out work while wearing the double backpack straps 15, 15, the double backpack straps 15, 1
Vibration isolators 17, 2 are provided between the upper and lower ends of 5 and the backpack frame 10.
2 is interposed, it is difficult for vibrations to be transmitted from the motor 1 side, and the worker can work without feeling uncomfortable. When the hook body 21 is removed from the locking tool 20, the backpack frame 10 can be easily removed from the worker.

Even if the vibration isolator 17 breaks while the person is carrying the person on his or her back, the upper end 15a of the backpack band 15 will engage with the locking tool 16.
Safety can be ensured, and since the effective length of the shoulder strap 15 can be adjusted by operating the buckle 24, it can be matched to the physique of the worker.

[Effect of idea]

In this way, the present invention has two shoulder straps 15, 15.
A belt-shaped vibration isolator 17 is provided between the upper and lower ends of the backpack frame 10 and the backpack frame 10.
Since the cylindrical vibration isolators 22 are interposed in each case, the vibrations of the motor 1 are less likely to be transmitted to the backpack bands 15, 15, and the user can comfortably carry them on their back without feeling uncomfortable. Shaking body 1
Even if the buckle 7 is broken, the upper end 15a of the backpack band 15 can be engaged with the locking tool 16, making it possible to create a secure and robust connection structure. Since the effective length can be adjusted, it can be worn comfortably according to the physique of the worker, and the hook body 21
This means that the backpack band 15 can be easily removed from the worker by removing the shoulder band 15, and has the advantage that it can be implemented suitably with a simple structure.

[Brief explanation of the drawing]

Fig. 1 is a side view of a backpack-type brush cutter that is an embodiment of the present invention, Fig. 2 is a partial plan view thereof, Fig. 3 is a sectional view taken along the line X-X in Fig. 2, and Fig. 4 is A sectional view taken along the Y-Y line in FIG. 2 is shown. DESCRIPTION OF SYMBOLS 1... Prime mover, 10... Back frame, 12... Vertical part, 15... Back strap, 16, 20... Locking tool, 17... Band-shaped vibration isolator, 15a... Upper end part, 2
1... Hook body, 15b... Lower end portion, 22... Cylindrical vibration isolator, 24... Buckle.

Claims (1)

[Scope of utility model registration request] A pair of double backpack bands 1 are provided at the upper and lower portions of the vertical portion 12 on the backpack side of the backpack frame 10 equipped with the prime mover 1.
In the backpack-type power working machine configured by connecting the upper and lower ends of the backpack frames 10 and 15, locking devices 16, 20, and 20 are respectively fixed to the upper and lower sides of the vertical portion 12 of the backpack frame 10, A band-shaped vibration isolator 17 is bent and hooked to the upper locking tool 16, and the upper end 15a of the backpack band 15, which is bent larger than the vibration isolator 17, is overlapped with the upper end 15a of the belt-shaped vibration isolator 17, and each end is attached to the shoulder strap. Attaches to band 15,
A cylindrical vibration isolator 22 that can be hooked by folding back the lower end 15b of the backpack band 15 is attached to the hook body 21 which can be hooked and detached from the lower locking tool 20. This vibration-proof backpack frame structure is characterized in that a buckle 24 for changing the effective length is interposed in the part.