JP2003120893A - Protection device for blast pipe in power work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protection device capable of protecting a blast pipe in a power work machine and holding wires arranged along the blast pipe. SOLUTION: This protection device 50 protects the blast pipe 22 in the power work machine 10 and is composed of an annular member 52 fitted in the blast pipe 22 at a desired position of the blast pipe 22, and a recessed part 56 for holding wires 34, 38 is provided in an outer peripheral part of the annular member 52. By attaching this protection device to the desired position of the blast pipe, a peripheral part at the position of the blast pipe is protected from the contact with a ground surface, a wall, a column, etc., by the protection device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power work machine equipped with a blower, for example, a portable power work machine such as a backpack type blower device or a power spreader, and more particularly to a blower pipe connected to the blower. Protective equipment for protection.

[0002]

2. Description of the Related Art A blower device is a portable power working machine which blows air from a blower pipe using a blower and collects dust such as fallen leaves at a desired place by the air jet flow for cleaning.

The blower pipe in such a blower device has conventionally been generally bendable or bendable, which is arranged between the blower pipe and the blower for adjusting the direction of the tip of the blower pipe. And a bellows tube (see FIG. 1). Since the operator holds and operates the jet tube by hand,
It is desirable to be lightweight and, as a result, is usually made of resin material to be thin. The bellows tube is desired to be lightweight as in the case of the injection tube, and is generally made thin from a flexible resin material so that it can be bent or curved easily.

Further, in the case of a blower device of the type in which the blower is driven by an internal combustion engine, at the tip of the blower pipe,
Some include a throttle lever for controlling a throttle valve of an internal combustion engine and a stop button for stopping the drive of the internal combustion engine by cutting off the power supply to the ignition valve. In such a blower device, a throttle wire and a lead wire extending from the throttle lever and the stop button to the internal combustion engine are provided along the blower pipe. Then, the Ω-shaped wire clamp 1 made of a spring steel wire as shown in FIG. 3 is fitted into the bellows tube 2, and the throttle wire 4 is attached to the ring 3 at the end of the wire clamp 1.
The lead wire 5 is held.

[0005]

Since the conventional blower device as described above is of a portable type, the blower pipe often comes into contact with the ground, the wall of the work place, or the like during movement. In such a case, the blower pipe, especially the thin-walled injection pipe or bellows pipe may be worn, and cracks or holes may be damaged. Such damage damages the blower device's original function of blowing air.

Further, in an internal combustion engine driven blower device in which a throttle lever and a stop button are provided at the tip of the blower pipe, a throttle wire 4 and a lead wire 5 extending from the throttle lever and the stop button are attached to a metal wire clamp. However, it is desired to handle wires without using such a wire clamp 1.

Such a problem also exists in other power working machines such as a backpack-type power spreader in which a blower tube causes a medicine or a chemical solution to be accompanied by air and ejects the air.

[0008] Therefore, an object of the present invention is to provide a protector capable of protecting a blower pipe of a power working machine and also capable of holding wires arranged along the blower pipe. .

[0009]

In order to achieve the above object, a protector (50) according to the present invention comprises a power working machine (1).
0) for protecting the blower pipe (22) connected to the air discharge port (20) of the blower (12), the blower pipe (22) at a desired position of the blower pipe (22).
It is characterized in that it comprises an annular member (52) which is fitted on the annular member (52), and a recess (56) for holding the wires (34, 38) is provided on the outer peripheral portion of the annular member (52).

Such a protector (50) is provided with a blower pipe (2
By attaching it to the desired position in 2), the blower pipe (22)
Before the contact object such as the ground, the wall, or the pillar comes into contact with the peripheral portion of the position in question, the contact object first comes into contact with the protector (50). Further, by attaching the protector (50) to at least two places, the outer peripheral portion of the protector (50) comes into contact with the plane (P) such as the ground, and at least the protector (5
The blower pipe (22) between 0) does not come into contact with the ground or the like.

Further, a recess (56) for holding wires such as the throttle wire (34) and the lead wire (38).
Can be appropriately provided on the outer peripheral portion of the annular member (52), so that it is possible to cope with an increase in the number of wires (34, 38). Further, when a plurality of such recesses (56) are provided on the outer peripheral portion of the annular member (52) at predetermined intervals, the holding positions of the wires (34, 38) can be freely selected, so that the wires ( 34, 38) can be easily handled.

The annular member (52) is preferably made of an elastically deformable material. By expanding its inner diameter, it can be easily fitted into the blower pipe (22), and then the inner diameter of the annular member (52) is reduced by the elastic restoring force, so that the inner peripheral portion of the annular member (52) is blown by the blower pipe (22). This is because it adheres to the outer peripheral surface of the. Further, if at least one slit (54) is formed in the inner peripheral portion of the annular member (52), the inner diameter of the annular member (52) can be expanded more easily, which is effective.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a backpack-type blower device to which the protector according to the present invention is applied. Illustrated blower device 1
0 itself has a conventionally known configuration, and the centrifugal blower 12
And an internal combustion engine 14 that drives the centrifugal blower 12, and a fuel tank 16 that stores the fuel of the internal combustion engine 14, and these are installed in a backpack frame 18 that is carried by an operator. A blower pipe 2 is provided at the air outlet 20 of the centrifugal blower 12.
2 are connected.

Although various forms can be considered as the blower pipe 22, in the illustrated embodiment, one end is connected to the air discharge port 20 of the centrifugal blower 12 and the other end of the bendable pipe 24 has one end. The bellows tube 26 is detachably connected, and the injection tube 28 is detachably connected to the other end of the bellows tube 26. This is a configuration considering that the operator adjusts the direction of the tip of the injection pipe 28 with the right hand while carrying the backpack frame 18, and the movement of the bellows pipe 26 causes the injection pipe 28 to pivot. It is possible to do. It is effective that the bellows tube 26 and the injection tube 28 are made thin from a flexible resin material so as to be lightened in order to improve the handleability.

The tip of the jet pipe 28 has a handle 3 for facilitating the operation of the blower pipe 22 by an operator.
0 is attached. A throttle lever 32 for opening and closing a throttle valve (not shown) of the internal combustion engine 14 is attached to the handle 30 for the purpose of improving the operability of the blower device 10.
A throttle wire 34 is connected between the throttle valve and the throttle lever 32. Further, the handle 30 is provided with a stop button 36 for stopping the internal combustion engine 14 by shutting off energization to an ignition valve (not shown) of the internal combustion engine 14. This stop button 36
Leads 38 to the electrical system of the ignition valve in the internal combustion engine 14.

As shown in FIG. 2, the protector 50 according to the present embodiment for protecting the blower pipe 22 of the blower device 10 is composed of a substantially circular annular member 52. This annular member 52 is provided at the desired position for the blower pipe 22.
It is designed to be fitted and attached to. The annular member 52 is made of rubber, elastomer, or the like so that the annular member 52 may be in close contact with the blower pipe 22 with a sufficient tightening force in the attached state.
It is made of a material that is elastically deformable to some extent, such as a soft resin, and has an inner diameter slightly smaller than the outer diameter at the mounting position of the blower pipe 22. In addition, the annular member 5
A plurality of slits 54 that extend outward in the radial direction are formed in the inner peripheral portion of 2 at equal intervals in the circumferential direction.

Since the outer diameter of the blower pipe 22 differs depending on the position, it is preferable to prepare several types of annular members 52 having different inner diameters. In the present embodiment, the annular member 52 is fitted to the valley portion of the bellows pipe 26 and the base end portion (end portion on the centrifugal blower side) of the injection pipe 28, and the inner diameter of the annular member 52 attached to the bellows pipe 26 is It is larger than that attached to the injection pipe 28.

The outer diameter (maximum outer diameter) of the annular member 52 is preferably the same regardless of the size of the inner diameter, and the size thereof is a region where protection is desired (a bellows tube in the illustrated embodiment). It is set to a value larger than the maximum outer diameter of the blower pipe 22 between the base end of 26 and the tip of the injection pipe 28).

Further, a plurality of substantially circular recesses 56 are formed on the outer peripheral portion of the annular member 52 as the protector 50 at equal intervals in the circumferential direction. The recess 56 is provided mainly for the purpose of holding the throttle wire 34,
The inner diameter thereof is the same as or slightly smaller than the outer diameter of the throttle wire 34. Further, the interval S between the portions 58 serving as the entrance of the recess 56 is made sufficiently smaller than the outer diameter of the throttle wire 34 so that the throttle wire 34 can be fitted into the recess 56 from the outside and held as it is.

In order to attach the protector 50 having such a structure to the blower pipe 22 of the blower device 10, first, the blower pipe 22 is disassembled. Then, the annular member 52 corresponding to the protector 50 is attached to the mounting position where the protector 50 is to be mounted, in the illustrated embodiment, at the valleys at both ends of the bellows tube 26 and the base end of the injection pipe 28 from the pipe end side. Fit in.
Although the inner diameter of the annular member 52 is smaller than the outer diameter of the valley portion of the bellows pipe 26 or the outer diameter of the injection pipe 28 in a state where no force is applied,
Since the annular member 52 is made of an elastic material, pulling the annular member 52 outward in the radial direction increases the inner diameter of the annular member 52, so that the pipes 26 and 28 can be fitted to each other. Further, the slit 52 provided on the inner peripheral portion of the annular member 52 makes it easier to increase the inner diameter of the annular member 52 and push it into the tubes 26, 28.

After placing the annular member 52 in place,
When the force applied to the annular member 52 is released, the annular member 5
The elastic restoring force of 2 reduces the inner diameter of the annular member 52.
As a result, the annular member 52 comes into close contact with the outer peripheral surface of the bellows tube 26 or the injection tube 28 and is held at that position.

After assembling the blower pipe 22, the throttle wire 34 extending between the throttle lever 32 and the throttle valve of the internal combustion engine 14 is fitted into the recess 56 of the annular member 52. Since a plurality of recesses 56 are provided, it is possible to select the recess 56 at the most suitable position in consideration of the position where the throttle wire 34 passes, the degree of bending of the bellows tube 26, the direction, and the like. As described above, the gap S between the inlets 58 of the recess 56 is smaller than the outer diameter of the throttle wire 34, but since the annular member 52 is made of an elastic material, the throttle wire 34 can be pushed from the outside.
It can be easily fitted into the concave portion 56, and once fitted, the interval S of the entrance 58 returns to the original size, so that it is prevented from falling off from there.

Further, the lead wire 38 extending from the electric system of the ignition valve to the stop button 36 of the handle 30 is likewise fitted in an appropriate recess 56. Since the outer diameter of the lead wire 38 may be considerably smaller than that of the throttle wire 34, in that case, as shown in FIG.
A tape or adapter tube 40 may be attached to the outer diameter of the throttle wire 34 to make it equal to the outer diameter of the throttle wire 34.

FIG. 1 shows a state in which the protector 50 is attached in this manner. In this state, even if a contact object such as a wall or a column approaches the site of the blower pipe 22 to which the protector 50 is attached, the protector 50 first contacts the contact object,
It is possible to avoid contact with the blower pipe 22.

At this time, since the protector 50 is made of an elastic material, the protector 50 plays a role of mitigating an impact at the time of contact with an object to be contacted. This also reduces the impact on the contact object. Further, in the illustrated embodiment, since the outer peripheral portion of the annular member 52, which is the protector 50, has a shape in which irregularities are continuous in the circumferential direction, the contact target is, so to speak, a point contact. Then, since the adjacent recesses 56 and the portions 60 between the recesses 56 are individually bent, the cushioning effect on both the blower pipe 22 and the contact object is increased.

Further, when the blower device 10 is moved or during the blower work, the blower pipe 22 may come into contact with a flat surface such as the ground or a wall. Even in such a case,
As shown by the chain double-dashed line in FIG. 1, the protector 50 contacts the plane P. Therefore, the contact between the blower pipe 22 and the plane P such as the ground is greatly reduced due to the presence of the protector 50, and the blower pipe 22 is less likely to be impacted or worn at the time of contact.
In particular, in the illustrated embodiment, the bellows pipe 26 and the jet pipe 28 of the blower pipe 22 are floated from the plane P such as the ground by the protector 50, so that the bellows pipe 26 and the jet pipe 28 are made thin and lightweight. However, it is possible to prevent the generation of cracks or holes due to contact with the plane P.

Since the throttle wire 34 and the lead wire 38 are held by the three protectors 50,
It is possible to reliably hold them and prevent the situation where the throttle wire 34 and the like hang down and hinder the work. Moreover, since the throttle wire 34 and the like are held in a form surrounded by the protective material 50 made of an elastic material, the throttle wire 34 and the like are prevented from being worn out as compared with the case where the throttle wire 34 is held by a conventional metal wire clamp. Damage can be significantly reduced.

The preferred embodiments of the present invention have been described above in detail, but it goes without saying that the present invention is not limited to the above embodiments.

For example, in the above embodiment, the wires held by the holding tool 50 are two wires, the throttle wire 34 and the lead wire 38, but they may be one wire or three wires or more. In addition, the recess 5 for attaching wires
Although the inner diameter of 0 is constant, two or more kinds of recesses having different inner diameters may be provided.

Further, the outer shape of the annular member 52 which is the protector 50 does not have to be circular, but may be polygonal such as hexagonal or so-called irregularly shaped such as elliptical.

Further, the annular member 52 may be annular as it is attached to the blower pipe 22, and therefore may be composed of two arcuate members which can be divided.

Furthermore, in the above embodiment, the blower device 10 is used.
Although the protective device of the present invention is attached to the blower pipe 22 of No. 1, even if the protective device is applied to a blower pipe (also referred to as a spray pipe) in another power working machine such as a backpack type power spreader. Good.

[0034]

As described above, according to the protector of the present invention, the blower pipe of the power working machine can be protected from contact with a flat surface such as the ground or a wall, and the blower pipe is rubbed or rubbed. Damage due to impact can be prevented and reduced. Therefore, the blower pipe can be made thin to reduce its weight, and the function and operability of the blower pipe, and thus the power working machine, can be further improved.

Further, since the wires such as the throttle wire arranged along the blower pipe can be held by the protector of the present invention, it is necessary to separately prepare a jig for collecting the wires. Disappear.

[Brief description of drawings]

FIG. 1 is a front view showing a backpack-type blower device to which a protector according to the present invention is applied.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view showing a conventionally used wire clamp.

[Explanation of symbols]

10 ... backpack type blower device (power working machine), 12 ... centrifugal blower, 14 ... internal combustion engine, 18 ... backpack frame, 20 ... air discharge port, 22 ... blower pipe, 26 ... bellows pipe, 28 ... jet pipe,
30 ... Handle, 32 ... Throttle lever, 34 ... Throttle wire (wires), 36 ... Stop button, 3
8 ... Lead wires (wires), 50 ... Protective equipment, 52 ... Annular member, 54 ... Slit, 56 ... Recess, 58 ... Entrance.

Claims (4)

[Claims] 1. A blower (1) in a power working machine (10).
Blower tube (22) connected to the air outlet (20) of 2)
A protector (50) for protecting a blower pipe (22) at a desired position of the blower pipe (22).
And a recess (56) for holding the wires (34, 38) is provided on the outer peripheral portion of the annular member (52). Protective equipment. 2. The recess (56) is provided with the annular member (5).
The protective device according to claim 1, wherein a plurality of protective devices are provided at a predetermined interval on the outer peripheral portion of 2). 3. The annular member (52) is made of an elastically deformable material.
Protective equipment described in. 4. The at least one slit (54) is formed in the inner peripheral portion of the annular member (52).
Protective equipment described in.