JP2007051606A - Assembling and disassembling structure for fuel tank of engine driven working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attaching and detaching structure for a fuel tank facilitating to detach the fuel tank without deteriorating a compactness of a layout structure of an engine driven working machine whole body. <P>SOLUTION: In the engine driven working machine capable of moving up and down by a crane or a forklift or the like, an opening part S through which the fuel tank T can passes is formed on a bottom plate Ba of a base B in a case, a cover plate A covering the opening part S from a lower side is fixed by an attachable and detachable fixing tool 16, and the fuel tank T is mounted on the cover plate A. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fuel tank attaching / detaching structure for an engine driven working machine that facilitates attaching / detaching work of a fuel tank such as an engine driven compressor, an engine driven generator, or an engine driven welder.

  Conventionally, in an outdoor construction site where there is no power supply facility, a portable type that has excellent mobility such that a drive source for driving a working machine body such as a compressor, a generator or a welding machine is obtained from an internal combustion engine. Engine-driven work machines are used. The engine-driven work machine is transported by being lifted by a crane, towed by a winch, or stacked or unloaded on a transport vehicle by using a forklift.

  The engine-driven work machine includes an engine in a work machine case, a work machine body coupled to an output shaft of the engine, a radiator and fan for cooling an engine connected to the engine, an exhaust muffler, and fuel for the engine. The main parts such as the fuel tank for supplying the engine and the auxiliary machines of the work machine body are compactly arranged and accommodated. When using a crane, the engine-driven work machine is lifted by locking a crane hook, a wire rope, or the like to a suspension locking tool provided on the roof of the case, and when using a forklift The fork is inserted into the lower side of the base of the work machine, or the fork is inserted into a fork insertion hole provided in the base.

  The fuel tank is generally a tank having a rectangular shape, and is disposed at the bottom of the base of the engine-driven work machine so as to be compactly disposed in the engine-driven work machine and to lower the overall center of gravity. There are a lot of arrangement structures. The base of the engine-driven work machine is generally a rectangular hollow base having an open top, and the fuel tank is installed in the base. Fuel supply to the fuel tank is supplied from a fuel supply port arranged inside or outside the engine-driven work machine.

Since the engine-driven work machine is used at an outdoor construction site or the like as described above, there is a problem that dust tends to enter the fuel tank from a fuel filler port when fuel is replenished. Further, when cleaning is performed to remove sludge and the like accumulated in the fuel tank, it is necessary to take the fuel tank out of the engine-driven work machine. However, in the operation of taking out the fuel tank at that time, since the fuel tank is installed in the base of the engine-driven work machine having a compact arrangement structure, the fuel tank is installed in the center of the base. In this case, in order to attach or remove the fuel tank, the panel is removed, and further, the engine, the work machine body, the exhaust muffler, etc. on the fuel tank are removed, and the fixing band and the piping relation of the fuel tank are removed. There was a problem that work had to be done.
Further, even in the case of an engine-driven work machine (for example, see Patent Document 1) installed on the end side, for example, a base on the front frame side, removal of the fuel tank, the fixed band, and the piping related Therefore, it is often necessary to take an unnatural take-off posture such as leaning forward, especially when the fuel tank is large and heavy, or when a large amount of fuel remains in the fuel tank. There was a risk of hurting the person's lower back. In addition, there were cases where it was not possible to work in a narrow place or a lift or the like had to be used.
Japanese Unexamined Patent Publication No. 2002-4857 (paragraphs 0020, 0025, FIGS. 1, 3)

For example, as described in Patent Document 1, in the conventional fuel tank attaching / detaching structure of the engine-driven working machine shown in FIG. 5A, when the fuel tank is taken out, as shown in FIG. The front panel Bn screwed to the front side of the engine-driven work machine on the frame side and the fuel supply bracket 3c ′ are removed and the fuel tank T ′ is fixed. It has a detachable structure, and the fuel tank T ′ can be taken out by pulling out the built-in fuel tank T ′ to the outside.
However, this fuel tank T ′ is actually a rubber between the bottom plate of the base B ′ and the fuel tank T ′ in order to prevent slippage in the portable engine-driven working machine and displacement of the arrangement position. Pads and rubber seats are laid in several places, which becomes the frictional resistance when dragging out the fuel tank T ′, making it difficult to pull out, and the weight of a large tank, etc. It was a heavy burden on the

  The object of the present invention is to solve the conventional problems as described above, eliminate the work of dragging the fuel tank, which is a heavy burden from the engine-driven work machine, and further, the fuel tank has a front part, a central part, a rear part of the base. The fuel tank attachment / detachment structure for an engine-driven work machine can be easily provided without damaging the compact arrangement structure of the entire engine-driven work machine. It is the purpose.

  Means taken in order to solve the above-mentioned problems of the present invention is that, in the invention relating to the fuel tank attaching / detaching structure of the engine-driven working machine according to claim 1, at least the engine and the work driven by the engine in the case In an engine-driven work machine that houses a machine main body and a fuel tank disposed at the bottom of a base in the case, an opening through which the fuel tank can pass is formed in the bottom plate of the base in the case, A cover plate that covers the opening from below is fixed by a detachable fixing tool, and the fuel tank is placed on the cover plate.

With this configuration, since the fuel tank is placed directly on the cover plate, the invention according to claim 1 is configured so that when the fuel tank installed in the case is taken out, Close the fuel hose and drain cock connected to the fuel tank from the side door of the drive work machine, the panel window, etc., and disconnect the drain piping related connections such as the drain hose. Thereafter, the engine-driven work machine is temporarily lifted and held to an appropriate height by a crane, a forklift, or the like, and during that time, the operator's hand is installed on the ground, which is fixed near the center of the base plate of the engine-driven work machine. Remove some fasteners such as bolts where it is difficult to reach. In other words, at the time of this temporary lifting state, the fixing tool on the outer peripheral edge portion of the cover plate is left without being removed so that the cover plate and the fuel tank placed directly thereon are not dropped. . It is also possible to remove the fixing tool at the outer peripheral edge by making the cover plate inwardly bent. Then, lower the engine-driven work machine to the ground and remove all remaining fasteners. After that, when the engine-driven work machine is lifted again, the engine-driven work machine is lifted while passing through the opening and the fuel tank is placed on the cover plate and left behind. Become. Therefore, when the fuel tank is left on the cover plate, the fuel tank can be easily lifted and taken out by hand even if a rubber pad, a rubber sheet or the like for preventing slipping is laid.
Therefore, when taking out the fuel tank, the operator does not hurt his / her waist due to the excessive burden required to drag out the fuel tank as in the conventional case or is forced to take an unnatural posture. The tank can be removed very easily and easily from above the lid plate that has been left behind.
Of course, the above-described fuel hose and drain cock may be closed and the piping related to the drain hose and the like may be disconnected when the engine-driven work machine is temporarily lifted and then lowered. In addition, in the work of attaching and detaching the fuel tank, in the ground installation state, it is convenient to install a sleeper or the like for making a gap between the engine drive working machine and the ground when removing the fixing member of the cover plate. .

  According to a second aspect of the present invention, in the invention related to the fuel tank attaching / detaching structure of the engine-driven work machine according to the first aspect, at least two leg members are provided on the lower side of the base, and one of the leg members is provided. The fuel tank is disposed at a position for supporting the fuel tank below the lid plate.

  With this configuration, the one leg member is disposed on the lower side of the lid plate and provided at a position that supports the fuel tank in a well-balanced manner, so that the lid plate is reinforced and the fuel tank is attached to the lid plate. Even when the weight is full when it is mounted on the top, it can be stably supported. When the lid plate is disposed at the center of the base, if the two leg members are respectively provided at both ends of the engine-driven work machine, the entire engine-driven work machine when lowered to the ground can be stabilized. Can be installed. In addition, the clearance gap formed between the bottom of an engine drive working machine and the ground by arrangement | positioning of the said leg member can be utilized for the clearance gap at the time of removing the fixing tool of the said cover plate.

  According to a third aspect of the present invention, in the invention relating to the fuel tank attaching / detaching structure of the engine-driven work machine according to the first or second aspect, the tank holding of the fuel tank placed on the upper side of the lid plate It is characterized by providing a piece.

  With this configuration, even when the portable engine-driven work machine is moved, the fuel tank is provided at a predetermined position in the engine-driven work machine by providing a tank locking piece for restricting the movement of the fuel tank. The tank can be stably held. The tank locking piece can also function as positioning when the fuel tank is placed on the lid plate.

  According to a fourth aspect of the present invention, in the invention related to the fuel tank attachment / detachment structure for an engine-driven work machine according to any one of the first to third aspects, the bracket member for restricting the movement of the fuel tank is provided in the invention. A holding member is provided along the edge of the opening of the bottom plate of the base, and a holding member for holding the upper surface of the fuel tank between the opposing bracket members.

  With this configuration, by providing the bracket member, the movement of the fuel tank in the front-rear direction is restricted, the edge of the opening of the base is reinforced, and the restraining member is provided between the bracket members. As a result, the upper surface of the fuel tank when the engine-driven work machine moves up and down is suppressed to restrict upward movement, and the fuel tank can be stably held in the engine-driven work machine.

  According to a fifth aspect of the present invention, in the invention according to the fuel tank attachment / detachment structure for an engine-driven work machine according to the fourth aspect, the restraining member is a band member having a fixing bracket at an end thereof. To do.

  With this configuration, the band member can securely hold the fuel tank from the upper surface with a simple configuration in which the fixing member provided at the end of the band member is simply fixed to the bracket with a bolt or the like.

The present invention has the following effects.
1. According to the present invention, it is possible to provide a fuel tank attaching / detaching structure for an engine-driven work machine without impairing a compact arrangement structure of main parts such as an engine and a work machine body housed in a case of the engine-driven work machine. it can. Moreover, since it can be configured with an extremely simple structure with a small number of parts, a low-cost fuel tank attaching / detaching structure can be provided.
2. According to the present invention, the fuel tank can be attached and detached without touching the main parts of the engine, the main body of the work machine, etc. so that the fuel tank can be attached / detached sufficiently by one worker, which requires a lot of manpower. Absent.
3. In the present invention, according to the invention having a configuration in which at least two leg members are disposed on the lower side of the base, the leg member can be locked with a fork of a forklift, and therefore other than a lifting machine such as a crane. The forklift also makes it easy to lift the engine-driven work machine, and when lowered to the ground, a space is formed between the bottom plate and the lid plate so that the fixing tool can be removed. Therefore, the fixing tool can be easily removed.
4). According to the present invention, according to the invention having a configuration in which the bracket member, the restraining member, and the tank locking piece are provided, the fuel tank can be positioned and stably and reliably accommodated and held in the case, and the fuel in the case The tank can be reliably regulated in terms of forward / backward, upward, left / right movement and peristalsis of the tank, preventing the fuel tank and hose from being disconnected from the piping, and preventing fuel leakage from the fuel tank due to hose disconnection. It can be surely prevented.
5. In the present invention, according to the invention having a configuration in which the holding member including the band member is provided, the fuel tank has a simple configuration in which a fixing bracket provided at an end thereof is simply fixed to the bracket with a bolt or the like. Can be reliably held from the upper surface, and when the fuel tank is taken out, it is lifted together with the case and detached from the upper surface of the fuel tank. Such troublesome work can be omitted.
6). According to the present invention, even in the case of a conventional engine-driven work machine that is already in use, the fuel tank attachment / detachment structure of the present invention can be easily taken out without greatly changing the conventional pull-out fuel tank attachment / detachment structure. It is possible and easy to improve.

  An embodiment of an engine-driven work machine according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall structure of the engine-driven working machine of the present embodiment. 2A is a front view of the engine-driven work machine, FIG. 2B is a front view of the engine-driven work machine, and FIG. 2C is a bottom view of the engine-driven work machine. FIG. 3 is an exploded explanatory view of a main part of the fuel tank attaching / detaching structure. FIG. 4 is an explanatory diagram of a fuel tank attaching / detaching operation mode.

(Overall structure)
As shown in FIG. 1, the engine-driven work machine of the present embodiment includes a case K that covers main machines such as an engine and a compressor, and a base B as a base on which these are installed. As shown in FIG. 2A, this engine-driven work machine (hereinafter referred to as a work machine) will be described below using an example in which the work machine is a compressor. In the following description, the front-rear and left-right directions correspond to the directions when the engine is viewed from the compressor of the work machine.

(Worker case structure)
As shown in FIG. 1, a work machine case K includes a front frame 3 and a rear frame 4, a roof panel 1 having a suspension latch L, a left side panel 5, and a right side door 6. Yes. Here, the front frame 3 refers to a frame member (structural member) that forms the front portion of the case K, and the rear frame 4 also refers to a frame member that forms the rear portion of the case K. The right side door 6 includes a front side door 6a and a rear side door 6b. The front side door 6a and the rear side door 6b are installed so as to be able to open with a hinge, and are normally locked by a lock device in the closed state.

The interior of the case K is formed in a structure in which a radiator chamber, a machine chamber such as an engine and a compressor, an exhaust muffler chamber, and the like are appropriately partitioned by a partition or a partition plate (not shown).
As shown in FIG. 1, the front frame 3 includes a front panel P that covers a window 3a (see FIG. 2B) formed in the front frame 3 and is detachably attached with a fastener such as a bolt. Is provided. The front panel P is provided with a locking bar Pa in a horizontal manner, and the rear panel 4 of the rear frame 4 is similarly provided with a locking bar in a horizontal manner. In addition, a fuel supply bracket 3 c is provided on the right side surface 3 b of the front frame 3 so that the fuel supply cap of the fuel tank T is exposed.

As shown in FIG. 1, an exhaust port 7 a having a constant width is formed on the front frame side of the roof panel 1, and a groove 2 is formed at the center of the roof panel 1. In this groove 2, a suspension locking tool L for locking a hook, rope, etc. of a crane is provided. The front side door 6a is formed with an air inlet 7b for the machine room, and the rear side door 6b is formed with an air inlet 7c for the machine room.
The outside air sucked from the air inlet 7b and the air inlet 7c is sucked by the rotation of the engine fan 8 that is directly mounted on the front end of the engine E shown in FIG. 2A and driven, and the rear frame 4 is not shown. Outside air is also sucked from the air inlets formed in the rear panel and the side panel, and flows into the case K. The air that has flowed into the case K passes through the engine and compressor machine chambers, and is discharged from the exhaust port 7a to the outside through an air passage formed in the case K such as the exhaust muffler chamber. . And it is comprised so that various machines and apparatus, such as the engine E inside a case K, and a working machine, may be cooled with the air which flows through this air path. The case K is formed in a structure having no openings other than the above-described intake and exhaust ports. Therefore, the partition structure inside the case K partitioned by the partition wall or the partition plate is a soundproof structure that reduces noise to the outside of the machine.

(Base structure)
As shown in FIG. 2 (a), an engine E is disposed at the center of the case K, and a compressor C connected to the output shaft of the engine E is located behind (on the left side of the figure). They are arranged in series. A radiator R is disposed in front of the engine E (on the right side in the figure), and an exhaust muffler M is disposed between the front radiator R and the front panel P provided on the front frame 3. It is installed. The engine E, the compressor C, and the like are fixed on a base bracket (not shown) provided on the bottom plate Ba at the center and the rear of the base B. A fuel supply pipe 3 of the fuel tank T is inserted through a rubber filler into a fuel supply bracket 3c provided on the front frame 3, and a fuel supply cap Cp is attached to the tip thereof.

The engine E and the exhaust muffler M are connected by an exhaust pipe 9. Further, a fuel tank T is disposed below the radiator R and the exhaust muffler M. The fuel tank T and the engine E are connected to each other by a fuel pipe described later. The fuel tank chamber that accommodates the fuel tank T is partitioned from the radiator chamber and the muffler chamber by a partition or partition plate (not shown).
As shown in FIG. 2B, on the upper surface of the fuel tank T, there are two restraining bands 11 and 11 (see FIG. 3) as restraining members at appropriate intervals in the left and right width directions of the base B. It is provided so that the fuel tank T can be pressed from above by the holding bands 11, 11. The front panel P for internal inspection attached to the window 3a of the front frame 3 can be removed by removing a fixing tool such as a bolt screwed around the periphery of the window 3a.

The structure of the base B on which the fuel tank T is placed will be described. As shown in FIG. 2C, the bottom plate Ba is formed with a substantially rectangular bottom plate opening S. In the present embodiment, the bottom plate opening S is formed on the front side of the front portion of the base B. However, the present invention is not limited to this, and the base plate B is disposed in accordance with the arrangement position of the fuel tank T. It may be formed in the rear part or the central part, and the opening shape may be an appropriate shape. The size of the bottom plate opening S is appropriately sized to allow the fuel tank T to pass therethrough, and the size of the periphery of the bottom plate opening S is at least 5 to 10 mm larger than the planar projection size of the fuel tank T. In the bottom plate opening S, a notch of an appropriate size through which the drain cock portion can pass is formed at the peripheral portion of the opening corresponding to the location where the drain cock of the fuel tank T is disposed.
The bottom plate opening S is covered with a detachable lid plate A formed so as to be applied from the outside of the base B. The lid plate A is formed from the bottom side of the base B with the bottom plate opening S. It is detachably fixed by a plurality of fixing tools such as bolts that are screwed to the periphery.

  In this embodiment, as shown in FIGS. 1 to 2C, leg members F and F are provided on the lid plate A and the bottom plate Ba below the base B so that the engine working machine can be installed in a well-balanced manner. It has. The leg member of the present invention is not limited to this, and at least two leg members F and F can be provided. In this case, at least one leg member F is provided in the lower central portion of the lid plate A. The leg member F is formed in an inverted U-shaped cross section. When both leg portions having an inverted U-shaped cross section are fixed to the cover plate A and the bottom plate Ba by welding or the like, the bottom surface thereof becomes a grounding portion, In addition, since it can be constructed in a box structure, it can be structurally firmly formed. The leg member F disposed on the lower side of the lid plate A also serves as a reinforcement for the lid plate A on which the fuel tank T is placed.

(Fuel tank mounting structure)
An outline of the structure of the attachment enlarged portion of the fuel tank T will be described with reference to an exploded explanatory view shown in FIG. In FIG. 3, the case portion is omitted.
As shown in FIG. 3, the base B includes a base bracket Bb that rises from the periphery of a rectangular bottom plate Ba, and the top of the base bracket Bb is folded back toward the inside of the base B so that the base flange Bf is Is formed. An auxiliary bracket 10 is provided along the opening edge of the bottom plate opening S formed in the bottom plate Ba so as to face the base bracket Bb on the front side. The flange 10a formed at the top of the auxiliary bracket 10 is formed at a height corresponding to the base flange Bf, and is not necessarily flush. The two restraining bands 11, 11 are attached so as to straddle the base flange Bf and the flange 10a. In addition, instead of the two restraining bands 11, 11, a single plate-like restraining member may be attached. Here, the base bracket Bb and the auxiliary bracket 10 correspond to a “bracket member” in the claims. The auxiliary bracket 10 can also serve as a base reinforcement.

The distance between the auxiliary bracket 10 and the base bracket Bb on the front side is set to be larger than the width of the fuel tank T to be accommodated so that the movement of the fuel tank T or the shift movement of the fuel tank T can be limited. desirable. In the present embodiment, since the fuel tank T is interposed between the base bracket Bb and the auxiliary bracket 10, the swinging or shifting movement of the work machine in the front-rear direction is restricted and stably performed. The fuel tank T can be held. Therefore, as another embodiment, in the case of an embodiment in which the fuel tank T is disposed at the center of the base B, the two auxiliary brackets 10 corresponding to the bracket members along the front and rear edges of the bottom plate opening S are provided. Are arranged so as to face each other, and the fuel tank T is provided so as to be sandwiched therebetween. Further, a notch (not shown) is provided at a lower portion of the auxiliary bracket 10 corresponding to a drain cock arrangement portion of the fuel tank T described later so as to avoid interference with the drain cock.
The holding band 11 is pressed from above the fuel tank T in accordance with the shape of the upper surface of the fuel tank T placed on the cover plate A, and can hold the upper or lower movement of the fuel tank T in a restrictable manner. The shape is a curved shape or the like.

(Fuel tank structure)
As shown in FIG. 3, the fuel tank T has a fuel supply pipe Ta erected substantially perpendicularly to the position of the corner portion on the front right side when viewing the base bracket Bb from the auxiliary bracket 10, and the right side of the rear corner portion thereof. The suction pipe 12 and the return pipe 13 are provided at an interval. The oil supply pipe Ta is formed in a length that passes through an opening formed in the oil supply bracket 3c shown in FIGS. 1 and 2, and an oil supply cap Cp is attached to the tip of the oil supply pipe Ta. The fuel supply pipe Ta is set up substantially vertically so that there is no obstacle when the fuel tank T is attached or detached. Therefore, it is not necessary to have a structure in which the fuel supply bracket 3c is removed as in the prior art. . The suction pipe 12 is connected to a fuel hose (not shown) and supplies fuel to a fuel supply portion of the engine E via a fuel pump. The return pipe 13 is also connected to a fuel hose (not shown) and This is for returning the excess fuel supplied to the fuel tank T. A drain cock (not shown) is provided on the bottom side of the fuel tank T below the suction pipe 12.
The oil supply pipe Ta may be formed so as to be inclined. In this case, the opening of the oil supply bracket 3c may be formed in an oval shape, or the oil supply bracket 3c may be detachably attached. As another form different from the illustrated embodiment, for example, in the case where the fuel tank T is disposed at the center of the base B, the fuel supply pipe Ta is disposed in the side door 6 shown in FIG. It is good to do so. When the side pipe 6 is opened and the fuel supply pipe Ta is disposed at a position where fuel is supplied, the fuel supply bracket 3c can be omitted.

(Cover plate structure)
The cover plate A on which the fuel tank T is placed is formed of a rectangular plate member, and mounting holes 15, 15... For fixing tools such as bolts 16 are formed in the periphery. . It should be noted that tank locking pieces 14 and 14 for restricting the displacement of the fuel tank T in the left-right direction or the front-rear direction and the like may be appropriately provided at both left and right ends of the upper surface of the lid plate A as necessary. When the fuel tank T is placed on the lid plate A, a non-slip rubber sheet or a rubber piece may be laid between the lid plate A and the fuel tank T. Moreover, the shape of the cover plate A does not stick to the rectangular shape.

(Explanation of fuel tank attachment / detachment operation)
Next, operations for attaching and detaching the fuel tank T will be described. When removing the fuel tank T mounted in the work machine for cleaning sludge accumulated in the fuel tank T, appearance, etc., first, the front side door 6a shown in FIG. The fuel hose with the engine E connected to the fuel tank T, the wiring such as the fuel gauge, and the drain cock are closed, and all the drain hose and the like are removed and separated from the main body of the fuel tank T. And the oiling cap Cp (refer FIG. 2A) in the oiling bracket 3c is also removed. At this time, it is not necessary to remove the fixtures of the restraining bands 11 and 11 shown in FIG. 3 provided to hold the upper surface of the fuel tank T.

  Next, for example, a crane hook or a wire rope or the like is locked to the suspension locking tool L shown in FIG. 1, and the work implement is lifted to an appropriate height and held in a suspended state. In this state, the fixing tool in the middle of the bottom plate Ba fixing the cover plate A is removed. In this case, the outer peripheral fixing tool that fixes the cover plate A is left without being removed. In this way, the reason is that only the fixing tool in the middle of the bottom plate Ba is removed and the fixing tool around the outside of the cover plate A is left because the operator's hand is difficult to reach deeply when the work machine is installed on the ground. Further, this is to prevent the cover plate A on which the fuel tank T is placed from falling.

  Next, after removing the fixing tool in the middle of the cover plate A, the work machine is lowered to the ground, and all the fixing tools around the outside of the remaining cover plate A are removed. Therefore, as shown in FIG. 3, in a state where all of the fixing tools are removed, the fuel tank T placed on the cover plate A and the case K and base B on the work machine main body side are completely disconnected. ing. For this reason, when the working machine is lifted again, as shown in FIG. 4, the holding bands 11, 11 that suppress the contact with the upper surface of the fuel tank T via the buffer band pads 11 a, 11 a are softened. When the base B is lifted together and detached from the upper surface of the fuel tank T without any trouble, and further, the working machine is lifted, the fuel tank T is placed on the cover plate A together with the leg member F and the bottom plate opening S (FIG. 2). (See (c)) and is taken out in a state of being left behind on the ground. In this way, the fuel tank T can be easily taken out even by one worker.

As described above, the fuel tank T left on the ground can be easily carried to a predetermined place by an operator, and the operator hurts his / her waist when taking it out. It doesn't force you to take a proper posture.
In addition, when mounting | wearing with the fuel tank T, of course, what is necessary is just to perform operation reverse to above-mentioned removal operation.

In addition, raising / lowering such as lifting of the working machine described in the present embodiment can be performed using a forklift or the like in addition to the crane. When using a forklift, separately from the leg member F, it is inserted between the leg members F and F or below the base B outside thereof and moved up or down, or a fork insertion hole or locking provided separately in the base part It is good to raise and lower by engaging with a groove or the like.
Further, in the work machine shown in FIG. 1, the plurality of holes formed below the front frame 3 are drain holes, so that rainwater and the like entering from the exhaust port 7a of the roof panel 1 of the work machine can be discharged. Is formed. This drain hole is formed below the front panel P at a location corresponding to the partition wall bottom of the exhaust muffler chamber (not shown).

It is a perspective view which shows the whole structure of the engine drive working machine of this embodiment. (A) is a front view of an engine drive work machine, (b) is a front view of an engine drive work machine, and (c) is a bottom view of the engine drive work machine. It is an exploded explanatory view of the principal part of a fuel tank attaching / detaching structure. It is explanatory drawing of a fuel tank attachment / detachment operation aspect. It is explanatory drawing of the conventional engine drive working machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roof panel 3 Front frame 4 Rear frame 5 Left side panel 6 Right side door 6a Front side door 6b Rear side door 10 Auxiliary bracket (bracket member)
11 Holding band 14 Tank locking piece A Cover plate B Base Ba Bottom plate Bb Base bracket (bracket member)
Cp Refueling cap F Leg member K Case L Suspension latch S Bottom plate opening T Fuel tank

Claims (5)

In an engine-driven work machine that houses at least an engine, a work machine main body driven by the engine, and a fuel tank arranged at the bottom of the base in the case in the case,
Forming an opening through which the fuel tank can pass in the bottom plate of the base in the case;
A fuel tank attaching / detaching structure for an engine-driven working machine, wherein a cover plate that covers the opening from below is fixed by a detachable fixing tool, and the fuel tank is placed on the cover plate.   The engine according to claim 1, wherein at least two leg members are provided on the lower side of the base, and one of the leg members is disposed at a position for supporting the fuel tank on the lower side of the cover plate. Fuel tank attachment / detachment structure for the drive work machine.   3. The fuel tank attachment / detachment of the engine-driven work machine according to claim 1, further comprising a tank locking piece for restricting movement of the fuel tank placed on the upper side of the lid plate. Construction. A bracket member for restricting the movement of the fuel tank is provided along the edge of the opening of the bottom plate of the base,
The fuel tank attaching / detaching structure for an engine-driven work machine according to any one of claims 1 to 3, wherein a holding member that suppresses an upper surface of the fuel tank is provided between the bracket members facing each other. The fuel tank attachment / detachment structure for an engine-driven work machine according to claim 4, wherein the holding member is a band member having a fixing bracket at an end thereof.

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