JP4237455B2 - Back working machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a backpack type work machine .
[0002]
[Prior art]
For example, the one disclosed in Japanese Patent No. 2709401 as shown in FIG. In FIG. 5, the fuel tank 200 is fixed to the front surface of the vertical portion 110 of the backpack frame 100 formed of a pipe material with a bolt or the like. On the other hand, the engine (not shown) is rotatably supported around the Y axis (vertical axis) by a support member 121 and an upper support member 122 attached to the horizontal portion 120 of the back frame 100. Also, a shoulder pad 210 is attached to the front surface of the fuel tank 200. As a result, the operator puts the shoulder strap 220 on the shoulder, puts the shoulder pad 210 on the back, and carries the shoulder frame 100 on which the relatively heavy engine and the fuel tank 200 are attached, thereby reducing the burden on the hands and arms. Work is possible.
[0003]
[Problems to be solved by the invention]
However, as shown in FIG. 5, since the side surface of the fuel tank 200 is exposed to the outside, the fuel tank 200 is made to hit the fuel tank 200 against an obstacle or the like during the operation. There is a possibility of damage.
[0004]
Further, as shown in FIG. 5, the engine is rotatably supported around the X axis (horizontal axis) by a support member 111 (indicated by a two-dot chain line) attached to the vertical portion 110 of the back frame 100. Causes the following problems. That is, as shown in FIG. 5, since the fuel tank 200 is disposed close to the front side of the vertical portion 110 of the back frame 100, an engine support shaft (not shown) is attached to the engine support member 111. When performing the attaching or detaching work, the working space between the front part of the support member 111 and the rear surface of the fuel tank 200 is small, and the attaching / detaching work of the engine is difficult, so that the assembling property and maintainability are poor. Furthermore, if the engine is disposed at a position spaced rearward from the rear surface of the fuel tank 200 in order to secure the work space, the center of gravity moves rearward, increasing the burden on the operator and simultaneously carrying the back frame 100. The engine cannot be stored in a compact.
[0005]
Further, since the fuel tube 201 (partially omitted) attached to the fuel tank 200 shown in FIG. 5 is exposed to the outside, the fuel tube 201 is caught on an obstacle or the like during the operation. The fuel tube 201 may be damaged.
[0006]
The present invention has been made paying attention to the above-mentioned problems, and can reliably protect the fuel tank and the fuel tube from obstacles, and can be easily attached and detached, and can be easily assembled and maintained. It aims to provide an excellent backpack-type work machine .
[0007]
[Means, actions and effects for solving the problems]
In order to achieve the above object, according to a first aspect of the present invention, there is provided a backpack-type working machine having an engine and a fuel tank attached to a backpack frame, wherein the engine is pivoted by the backpack frame. A support shaft that is supported; and a supply port for fuel supply , wherein the back frame includes a support portion that supports the support shaft of the engine that is penetrated from a rear surface to a front surface of the back frame, and A storage portion for storing the fuel tank on the front surface of the back frame, and the storage portion includes a frame that covers a side surface of the fuel tank, and the fuel tank penetrates from the rear surface to the front surface of the fuel tank. And a fuel outlet disposed in front of the fuel tank, and the fuel outlet is inserted into the through hole and a hollow portion of the engine support shaft to contact the engine supply port. A fuel hose connected to the engine, and the support shaft of the engine is pivotally supported by the support portion of the backpack frame and the fuel tank is stored in the storage portion of the backpack frame. The shaft end of the support portion is exposed to the front side of the fuel tank by positioning the through hole of the fuel tank so as to face the shaft end of the support portion.
[0008]
According to the first aspect of the invention, the fuel tank is housed in the front surface of the back frame, and the housing part has a frame that covers the side surface of the fuel tank. It can protect against obstacles and prevent damage to the fuel tank.
According to the first invention, the fuel tank includes a fuel hose for supplying fuel from the fuel tank to the engine, and the fuel hose is inserted from the fuel tank through the through hole of the fuel tank, Since the fuel hose is connected to the engine, there is no movement of the fuel tube due to the rotation of the engine during operation, and there is no fear that the fuel tube will be caught by an obstacle and damaged.
[0010]
According to the first invention , the fuel tank exposes a shaft end of a support shaft that pivotally supports the engine on the back frame when the fuel tank is stored in the storage portion of the back frame. Since the through hole is provided, the work can be performed through the through hole when the support shaft is attached to or removed from the carrying frame. Accordingly, the engine can be easily attached and detached, and the assemblability and maintainability are improved. Further, according to the structure, the engine can be disposed close to the rear surface of the fuel tank, so that the center of gravity of the engine can be held forward, that is, near the operator's back. As a result, it is possible to reduce the burden of weight on the operator and to fit the engine in a compact frame.
[0011]
In a second aspect based on the first aspect, the carrying frame is provided with a window on the frame portion covering the side surface of the fuel tank so that the amount of fuel in the fuel tank can be visually confirmed from the outside. It is characterized by that.
[0012]
According to the second invention , the carrying frame is provided with a window in the frame portion covering the side surface of the fuel tank so that the amount of fuel in the fuel tank can be visually confirmed from the outside. Even during work, the amount of fuel in the fuel tank can be easily confirmed visually.
[0013]
In a third aspect based on the first aspect, the back frame is formed by integral molding of a resin material.
[0014]
According to the third invention , the back frame is formed by integral molding of a resin material, so that the appearance is smooth and strong against external forces such as impact, and the manufacturing cost is low and suitable for mass production.
[0017]
According to a fourth aspect of the present invention , in any one of the first to third aspects, the backpack includes a backpack that is attached to a front surface of the backpack and covers a fuel tank housing portion of the backpack, the backpack. Is characterized in that a shielding portion for preventing the spraying of fuel is provided.
[0018]
According to a fourth invention , in any one of the first to third inventions, the back frame includes a back pad that is attached to a front surface of the back frame and covers a storage portion of a fuel tank of the back frame, and the back frame. Since the pad is provided with a shielding portion for preventing the fuel from being sprayed, there is an effect of preventing the fuel from adhering to the shoulder pad when the fuel is supplied to the fuel tank.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below with reference to the drawings.
[0020]
An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is an example of a backpack portion of a backpack-type working machine according to the present invention, and FIG. 2 is a side sectional view of the backpack portion of the backpack-type work machine. 1 and 2, reference numeral 1 denotes a backpack frame, and an engine 3 and a fuel tank 2 are attached to the backframe 1.
[0021]
The backpack frame 1 shown in FIG. 2 is manufactured by an integral molding process of a resin material, and a storage portion 13 is formed in the vertical portion 11 of the backpack frame 1. A handle portion 1T is formed on the upper portion of the vertical portion 11 of the carrying frame 1. The fuel tank 2 is stored in the storage portion 13, and the stored fuel tank 2 is fixed to the back frame 1 with a bolt 5 at a flange portion 21 provided around the fuel tank 2. On the other hand, as shown in FIG. 1, the carrying frame 1 forms a frame 14 at the end of the vertical portion 11. As shown in FIG. 3, the frame 14 at the left and right end portions of the carrying frame 1 is formed so as to cover the side surface of the fuel tank 2, and on the other hand, the frame 14 stores the remaining amount of fuel inside the fuel tank. Windows 14a, 14b, and 14c for confirmation are provided. Thereby, the frame 14 can protect the fuel tank 2. Further, the worker can work with peace of mind while checking the remaining amount of fuel in the fuel tank 2 through the windows 14a, 14b, 14c.
[0022]
As shown in FIG. 2, the engine 3 is pivotally supported by the support shaft 31 on the vertical portion 11 of the backpack frame 1 via a bearing 32, a support member 33 and a buffer member 34. On the other hand, the fuel tank 2 includes a through hole 22 at a position where the shaft end 32 of the support shaft 31 is exposed in a state where the fuel tank 2 is stored in the storage portion 13 formed in the vertical portion 11 of the carrying frame 1. Thereby, when performing the operation | work which attaches or removes the engine 3, it can work through the said through-hole 22, Therefore The attachment or detachment operation | work of the engine 3 is easy, and assembly property and maintainability are excellent. Further, according to the above structure, the engine 3 can be disposed close to the rear surface of the fuel tank 2, so that the position of the center of gravity of the engine 3 can be held forward, that is, near the operator's back. As a result, the burden of weight on the operator can be reduced, and the engine 3 can be accommodated in the back frame 1 in a compact manner.
[0023]
Next, as shown in FIG. 2, the fuel hose 4 for supplying fuel from the fuel tank 2 to the engine 3 is connected to the through hole 22 of the fuel tank 2 and the engine from the fuel outlet (not shown) of the fuel tank 3. Is inserted through the hollow portion of the support shaft 31 and connected to a fuel supply port (not shown) of the engine 3. For this reason, even if the engine 3 rotates during work, the fuel tube 4 does not move relative to the engine 3 and does not get damaged by being caught by an obstacle.
[0024]
In FIG. 2, a backpack pad 6 that covers the fuel tank 2 stored in the storage portion 13 of the fuel tank 2 of the backpack frame 1 is attached to the backpack frame 1. As shown in FIG. 4, the backpack 6 is provided with a shield 61 on the backpad 6 at a portion close to the fuel injection port 23. The shielding portion 61 prevents the fuel from adhering to the front surface 6a of the backpack 6 due to fuel spillage when the fuel is supplied to the fuel tank 2 from the fuel inlet 23.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which an engine, a fuel tank, and a back pad are attached to a back frame of a back working machine according to the present invention.
FIG. 2 is a side cross-sectional view showing a state in which an engine, a fuel tank, and a back pad are attached to a back frame of a back working machine according to the present invention.
FIG. 3 is a perspective view showing a state in which a fuel tank is housed in a backpack frame of a backpack-type working machine according to the present invention.
4 is a perspective view showing a state in which a shoulder pad is attached to the state of FIG. 3. FIG.
FIG. 5 is an exploded perspective view of a backpack frame of a conventional backpack-type working machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Backpack frame, 2 ... Fuel tank, 3 ... Engine, 4 ... Fuel hose, 6 ... Backpack, 13 ... Storage part, 14 ... Frame, 14a, 14b, 14c ... Window, 22 ... Through-hole, 23 ... Fuel injection Inlet, 31 ... support shaft, 32 ... shaft end, 61 ... shielding part.

Claims (4)

In a backpack type work machine in which an engine and a fuel tank are attached to a backpack frame,
The engine includes a support shaft that is rotatably supported by the backpack frame, and a fuel supply supply port .
The back frame includes a support portion that supports the support shaft of the engine that is penetrated from the rear surface to the front surface of the back frame, and a storage portion that stores the fuel tank on the front surface of the back frame. The storage portion includes a frame that covers a side surface of the fuel tank,
The fuel tank includes a through hole penetrating from the rear surface to the front surface of the fuel tank, a fuel outlet disposed at the front surface of the fuel tank, a through hole from the fuel outlet and a hollow portion of the support shaft of the engine. A fuel hose inserted into the engine and connected to the supply port of the engine ,
In a state where the support shaft of the engine is pivotally supported by the support portion of the backpack frame and in a state where the fuel tank is stored in the storage portion of the backpack frame, it faces the shaft end of the support portion of the engine. Then, the through hole of the fuel tank is positioned so that the shaft end of the support portion is exposed to the front side of the fuel tank.   2. The backpack type according to claim 1, wherein the backrest frame is provided with a window that allows the amount of fuel in the fuel tank to be visually confirmed from the outside in a frame portion that covers a side surface of the fuel tank. Working machine.   The backpack-type working machine according to claim 1, wherein the backpack frame is formed by integral molding of a resin material. The back frame is attached to a front surface of the back frame, and includes a back pad that covers a storage portion of a fuel tank of the back frame, and the back pad is provided with a shielding portion that prevents fuel from spraying. The backpack type work machine according to any one of claims 1 to 3 .

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