JPS6318456Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a device for attaching a jet pipe to the high-pressure air discharge end of a blower installed in the main body of a backpack-type blower machine, such as a backpack-type power spreader. .

BACKGROUND TECHNOLOGY The jet pipe of the above-mentioned conventional air blowing machine is generally attached to the high-pressure air discharge end of the main body in such a way that it cannot be easily removed, and therefore a relatively large space is required for transporting and storing the machine. In addition, when shipping the machine, a large packing case is required, which increases shipping costs, and the machine also has the drawbacks of being prone to falling over and being damaged. To provide a jet pipe mounting device having a simple and convenient structure, which eliminates the drawbacks of the blower working machine, and allows the machine to be easily handled and operated, and the jet pipe can be easily replaced.

Structure of the invention That is, the structure of the invention consists of a cylindrical member attached to the high-pressure air discharge end of the blower provided in the main body of the blower work machine, and a cylindrical member attached to one end of the jet pipe and fitted into the cylindrical member. a sleeve member formed on the inner circumferential surface of the cylindrical member; and an arcuate groove formed on the outer circumferential surface of the sleeve member that fits into the arcuate groove by rotation of the sleeve member relative to the cylindrical member. It is characterized by having a protrusion that holds the sleeve member immovably in the axial direction relative to the cylindrical member.

Effects of the invention Therefore, according to the structure of the invention, the jet pipe can be removed from and attached to the blower work machine body by rotating the sleeve member, which is convenient because it does not take up much space during transportation and storage. The shipping and packaging of the machine is also smaller and more economical, and it also has great practical effects, such as preventing the machine from falling over, ensuring stable storage, and making the machine less likely to be damaged.

Embodiments Next, the present invention will be explained according to embodiments shown in the drawings.

FIG. 1 is a side view of the main body of a backpack-type blower working machine, and the main body is designated as a whole by reference numeral 1.
Inside the main body 1, there is built-in an internal combustion engine as a power source, and a blower that is operatively connected to and driven by the internal combustion engine to generate pressurized air. The high-pressure air discharge end 2 of the blower opens on the side of the main body 1,
A curved jet pipe 3 is removably attached to the discharge end 2 by means of a jet pipe mounting device according to the present invention, and the jet pipe mounting device is designated by the reference numeral 4 as a whole.

This work machine is used by being carried on the back of the operator by means of a backpack device (a part of which is indicated by reference numeral 5 in FIG. 1). 2) to drive the blower while controlling the operation of the internal combustion engine, and blow out pressurized air from the outlet at the tip of the curved jet pipe 3.

When spraying a chemical, remove the gripping member 7 attached to the top of the main body 1, attach the chemical tank to the top of the main body, bleed some of the pressurized air from the blower and send it into the chemical tank, and then apply the pressure to the chemical tank. Therefore, the drug is force-fed from the drug tank to the tip nozzle of the curved jet tube 3 via the conduit, and the drug is sprayed from the tip nozzle on the air discharged by the pressurized air sent through the curved jet tube 3. It's becoming like that.

The jet pipe attachment device 4 is fixed to a cylindrical member 8 that is fixed to the main body 1 and constitutes the high-pressure air discharge end 2 of the blower, and is fixed to the upstream end of the curved jet pipe 3 and inserted into the cylindrical member 8 over almost its entire width. It has a sleeve member 9 that fits loosely across the sleeve. The cylindrical member 8 communicates within the body 1 with a high-pressure spiral chamber 10 of the blower. Furthermore, the cylindrical member 8 is integrally formed with an annular step 12 protruding radially outward near its outer end 11;
A large diameter annular portion 13 between the step portion 12 and the outer end 11
is formed. The large-diameter annular portion 13 has a flat inner circumferential surface 14 within a center angle range of about 180 degrees on the rear side of the main body 1, but has an arc-shaped engagement with the outer end 11 in the remaining center angle range on the front side of the main body. A stop portion 15 is integrally formed. The locking portion 15 has a U-shaped cross section and includes a portion 16 extending radially inward from the outer end 11 and a portion 17 extending axially from the portion 16 along the inner peripheral surface 14. and part 1
The radius of the inner peripheral surface of the sleeve member 7 is slightly smaller than the radius of the outer peripheral surface of the sleeve member 9.

On the other hand, the sleeve member 9 is integrally formed with an arc-shaped protrusion 18 that protrudes radially outward near the outer end 11 of the cylindrical member 8, and the protrusion 18 extends in the direction in which the curved jet pipe 3 extends. The side has an arc length slightly smaller than the central angle of 180 degrees, and the protrusion 18
The radius of the outer circumference of the cylindrical member 8 is slightly smaller than the radius of the inner peripheral surface 14 of the large-diameter annular portion 13 of the cylindrical member 8.

During use, the sleeve member 9 is placed relative to the cylindrical member 8 in a position where the protrusion 18 does not come into contact with the locking portion 15, and the protrusion 18 touches the stepped portion 12 of the cylindrical member 8.
When the sleeve member 9 is inserted into the cylindrical member 8 together with the curved jet pipe 3 until it comes into contact with the cylindrical member 8, and then the sleeve member 9 is rotated about 180 degrees in the angular direction with respect to the cylindrical member 8, the sleeve member 9 The protruding portion 18 enters and is locked in an arcuate groove defined between the step portion 12 and the portion 17 of the locking portion 15 within the large-diameter annular portion 13 of the cylindrical member 8, and is locked in the curved jet during operation. Within the range of rotation of the tube 3, the sleeve member 9, ie, the curved jet tube 3, is held unreleasably from the cylindrical member 8, ie, the main body 1. When removing the sleeve member 9 from the cylindrical member 8, the sleeve member 9 is rotated in the opposite direction relative to the cylindrical member 8 until the entire protrusion 18 comes out of the circular arc groove, and then the sleeve member 9 is removed from the cylindrical member. Pull it out from the shaped member 8.

In another embodiment of the invention, the surface of the protruding portion 18 facing the portion 17 of the locking portion 15 is formed with an angularly inclined taper, and when the sleeve member 9 is rotated, the portion 17 of the locking portion 15 is tapered. , thereby firmly holding the sleeve member 9 within the cylindrical member 8.

In yet another embodiment of the present invention, a leaf spring is mounted within the locking portion 15 and resiliently engages the projection 18 to provide suitable resistance to rotation of the sleeve member 9 within the cylindrical member 8.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a backpack-type blower work machine equipped with a jet pipe attachment device according to the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1. DESCRIPTION OF SYMBOLS 1... Main body, 2... High pressure air discharge end, 3... Curved jet pipe, 4... Jet pipe attachment device, 8... Cylindrical member,
9... Sleeve member, 12... Annular stepped portion, 13...
...Large diameter annular portion, 15...Locking portion, 18...Protrusion portion.

Claims (1)

[Scope of utility model registration request] A cylindrical member attached to a high-pressure air discharge end of a blower provided in a main body of a blower work machine, a sleeve member attached to one end of a jet pipe and fitted into the cylindrical member, and the cylindrical member. an arcuate groove formed on the inner circumferential surface of the sleeve member; and a circular groove formed on the outer circumferential surface of the sleeve member, which is fitted into the arcuate groove by rotation of the sleeve member relative to the cylindrical member, so that the sleeve member A jet pipe attachment device characterized by having a protrusion that holds the cylindrical member immovably in the axial direction.