JP2014018945A - Portable working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable working machine capable of efficiently performing a cutting work.SOLUTION: A chain saw to be a portable working machine is used to cut a work object by a saw chain provided with a plurality of blade sections. The chain saw includes a working machine body provided with a driving source, and the saw chain driven by the driving source is laid over a guide bar. Chain oil stored in a tank 20 is supplied to the saw chain. The tank 20 includes an oil supply guide cylinder 30 and a partition wall section 33 facing an oil supply port 31 of the oil supply guide cylinder 30. A communication port 34 communicating the oil supply port 31 with a storage chamber 27 is formed by the partition wall section 33.

Description

  The present invention relates to a portable work machine such as a chain saw for cutting a work object such as wood with a saw chain.

  Examples of portable work machines include a chain saw and a trimming machine. The chain saw is used for cutting a work object such as wood, and has a loop-shaped saw chain, that is, a chain saw, provided with a blade portion protruding outward as a work tool. The saw chain is looped over a guide bar attached to a housing as a work machine body so as to be rotatable. The saw chain is driven to rotate by a drive source provided in the housing.

  An engine or an electric motor is used as a drive source for a chain saw or a trimming machine as a portable work machine. An example of a chain saw that uses an electric motor as a drive source is disclosed in Patent Document 1.

JP 2011-136384 A

  The working machine body of the chain saw is provided with a lubricating oil tank for storing lubricating oil supplied to the saw chain, that is, chain oil, when the work object is cut by the chain saw. In addition, a fuel oil tank is provided in the work machine main body in a chain saw using the engine as a drive source in order to accommodate fuel supplied to the engine. In order to prevent the oil supply to the saw chain from being cut off, the remaining amount of chain oil in the tank is checked when the cutting operation is performed. In a chain saw using an engine as a drive source, the remaining amount of fuel in the fuel tank is checked. When the remaining amount of chain oil or fuel oil is small, the respective tank caps are removed from the tank filling ports, and oil is injected into the oil tank and the fuel tank.

  The tank cap of the oil tank and the tank cap of the fuel tank are arranged so as to be exposed on the side surface of the work machine main body, and the chain saw is usually installed in the horizontal direction so that the fuel filler port faces upward when a refueling operation is performed. It is assumed that it has been defeated. When the chain oil is supplied to the oil tank, in the conventional oil tank structure, the chain oil may overflow from the oil tank before the chain oil becomes full. In addition, when the chain saw is returned to the upright state when the oil tank is filled with chain oil, if the tank cap is forgotten to close or the tank cap is loose, the chain oil May leak. If you forget to close the tank cap or if the tank cap is loose, the chain oil will not be lost when the chain saw is tilted sideways to check the remaining amount of chain oil or when the chain saw is tilted. May leak from the tank. Such a problem also applies to a fuel tank that stores fuel oil.

  As described above, when the oil overflows or leaks from the tank in the portable work machine such as a chain saw, the work in the portable work machine cannot be performed efficiently.

  An object of the present invention is to provide a portable work machine that can efficiently perform cutting work and the like.

  The portable work machine according to the present invention has a work machine body provided with a work tool provided with a drive source and driven by the drive source, and a storage chamber for containing oil such as lubricating oil or fuel oil, A tank incorporated in the work implement main body, an oil supply port provided at the outer end and a tank cap is detachably mounted, and a partition wall portion facing the oil supply port is provided in the tank. And a communication port for communicating the oil supply guide tube and the storage chamber is formed by the partition wall.

  The portable work machine according to the present invention is characterized in that a bulging portion that protrudes toward the fuel filler port and communicates with the storage chamber is provided in the tank. The portable work machine according to the present invention is characterized in that the partition wall portion is provided at an inner end of the oil supply guide cylinder, and the communication port is formed between a ceiling wall of the tank and the partition wall portion. . The portable work machine of the present invention is characterized in that the partition wall portion is provided continuously to the top wall portion of the tank, and the communication port is formed by the partition wall portion and the side wall portion of the tank.

  The portable working machine according to the present invention is characterized in that the communication port has a width smaller than an inner diameter of the oil supply guide tube. The portable work machine according to the present invention is characterized in that the refueling port is provided on a side surface of the work machine body in an upright state. The portable work machine according to the present invention is characterized in that the work tool includes a saw chain provided with a plurality of blades driven by the drive source, and the tank stores a chain oil supplied to the saw chain. To do.

  A tank that is incorporated in the work machine body and stores oil such as lubricating oil or fuel oil is provided with a partition wall portion that faces the oil supply port of the oil supply guide cylinder, and communicates the oil supply guide cylinder and the storage chamber. The communication port is formed by the partition wall. As a result, when injecting oil into the tank with the oil supply port facing upward, if the injection operation was performed until the oil level reached the position of the partition wall, the oil was filled in the tank. Therefore, the oil injection operation can be easily performed. Furthermore, after injecting oil, if the work equipment body is in the upright position at the position where the oil filler port is on the side surface of the work equipment body, the partition wall will face in the vertical direction, and the oil in the tank will To prevent leakage. Therefore, even if the tank cap is loose or the tank cap is forgotten to be attached, the chain oil is prevented from leaking to the outside, and the cutting operation can be performed efficiently. Further, even when oil is supplied in a full state in the oil tank, it is possible to prevent oil from leaking from the oil supply guide tube.

It is a front view which shows the chain saw as a portable working machine of one embodiment. It is a right view of FIG. It is sectional drawing which shows the part in which the oil tank in a chain saw is integrated. It is a front view which shows the oil tank shown by FIG. FIG. 5 is a plan view of FIG. 4. FIG. 5 is a right side view of FIG. 4. FIG. 5 is a cross-sectional view of FIG. 4. (A) is sectional drawing which shows the oil tank in the chain saw which became the state which laid down sideways so that a fueling port may face upwards, (B) became an erect state so that a fueling port might face the side It is sectional drawing which shows the oil tank in a chain saw. It is sectional drawing which shows the modification of an oil tank. It is sectional drawing which shows the other modification of an oil tank.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the chain saw 10 has a work machine body 11. The work machine main body 11 is formed by a case assembly including a plurality of case members made of a hard resin material, and an electric motor as a drive source is incorporated in a motor case 11a constituting the case assembly. ing. A guide bar 12 is attached to the front side portion of the work machine body 11, and the guide bar 12 protrudes forward of the work machine body 11. The guide bar 12 has a loop as a work tool as shown in FIG. An endless chain saw, that is, a saw chain 13 is wound around. The saw chain 13 is suspended in mesh with a sprocket (not shown) driven by an electric motor, and the saw chain 13 is rotationally driven by the electric motor. The saw chain 13 is provided with a plurality of blade portions at predetermined intervals, and each blade portion protrudes outward. By rotating the saw chain 13, a work object such as wood can be cut by the saw chain 13.

  As shown in FIG. 1, a rear handle, that is, a main handle 14 is provided at the rear end portion of the work machine body 11 so as to protrude rearward. The upper side of the work machine body 11 extends along the motor case 11 a. An extending front handle or sub handle 15 is provided. The operator holds the main handle 14 with one hand, holds the sub handle 15 with the other hand, and performs the cutting operation of the work object in a state where the chain saw 10 is lifted. As shown in FIG. 1, the main handle 14 is provided with a trigger switch, that is, an activation switch 16 for activating the electric motor. A protective cover 17 is provided at the front end of the work machine body 11.

  As shown in FIG. 3, the work machine body 11 incorporates a lubricating oil tank 20 for storing the chain oil supplied as the lubricating oil to the saw chain 13. The external appearance of the tank 20 is as shown in FIGS. 4 to 6, and the tank 20 is formed of a resin material having transparency. The tank 20 includes a bottom wall portion 21, front and rear end wall portions 22 and 23, left and right side wall portions 24 and 25, and a top wall portion 26, and a storage chamber 27 that stores chain oil therein. Is formed. A portion of the tank 20 that forms the storage chamber 27 is a tank body 28. When the tank 20 is assembled in the work machine main body 11, as shown in FIG. 3, one side wall portion 24 is disposed outside and the other side wall portion 25 is disposed inside.

  An oil supply guide tube 30 is provided on the upper end side of the side wall 24 of the tank 20, and an oil supply port 31 is provided on the outer end of the oil supply guide tube 30. As shown in FIG. 2, a tank cap 32 is detachably attached to the oil supply guide cylinder 30, and the oil supply port 31 of the oil supply guide cylinder 30 is closed by the tank cap 32. A male screw is formed on the outer peripheral surface of the oil supply guide tube 30, and a female screw that is screwed to the oil supply guide tube 30 is formed on the tank cap 32.

  As shown in FIG. 7, a partition wall portion 33 is provided on the side wall portion 24 continuously. The partition wall portion 33 extends toward the top wall portion 26, and the partition wall portion 33 faces the oil supply port 31 of the oil supply guide tube 30. A communication port 34 is formed between the end surface of the partition wall portion 33 and the inner surface of the tank 20 to allow the oil supply port 31 and the storage chamber 27 to communicate with each other. The inner diameter of the communication port 34 is smaller than the inner diameter of the oil supply guide cylinder, and is semicircular as shown in FIG.

  An external exposed portion 35 is provided on the side wall portion 24 of the tank 20. As shown in FIG. 3, the external exposed portion 35 is exposed to the outside by an inspection window 36 provided on the work machine body 11. . The tank 20 is formed of a transparent resin, and the operator can check the remaining amount of chain oil stored in the storage chamber 27 by viewing the externally exposed portion 35. As shown in FIG. 3, an outflow nozzle 37 is provided at the bottom of the tank 20, and the chain oil in the tank 20 flows out of the outflow nozzle 37 and is supplied to the saw chain 13 by a pump (not shown).

  As shown in FIGS. 6 and 7, adjacent to the external exposed portion 35, a bulging portion 41 is provided on the side wall portion 24 of the tank 20 so as to protrude toward the fuel filler port 31. A bulging space 42 is formed inside 41, and the bulging space 42 communicates with the storage chamber 27 at a lower portion of the tank 20.

  When the chain oil is injected into the storage chamber 27 of the tank 20, the chain saw 10 is put to lie so that the oil supply port 31 faces upward. 10 is set in the upright state shown in FIG. 3, and the fuel filler port 31 is directed to the side surface of the work machine body 11 of the chain saw 10.

  FIG. 8 (A) shows the tank 20 in a state where the chain saw 10 is tilted sideways so that the fuel filler port 31 faces upward and laid down. When the chain oil C is supplied into the storage chamber 27 of the tank 20, for example, as shown in FIG. 8A, the chain oil C is supplied from the oil supply guide cylinder 30 with the chain saw 10 and the tank 20 lying down. Refuel. At this time, the chain oil C collides with the partition wall portion 33, is guided there, and is injected from the communication port 34 into the storage chamber 27 in the tank body 28. When the chain oil C is injected to the full tank position of the partition wall 33, the liquid level is visually observed from the outside, so that the operator can easily confirm that the chain oil is full in the tank 20. can do. In this full tank state, the liquid level comes into contact with the side wall 24 of the tank 20 and the bulging portion 41 is closed, so that the air is sealed in the bulging space 42 in the bulging portion 41. Thus, the chain oil C does not enter the bulging space 42.

  FIG. 8B shows the tank 20 in the chain saw 10 that has been brought into an upright state after the chain oil C is supplied into the tank 20. In the state where the tank 20 is laid down sideways as shown in FIG. 8A, even if the level of the chain oil C reaches the position of the partition wall 33, it is shown in FIG. Thus, when the tank 20 is rotated clockwise from the state of FIG. 8A to bring the tank 20 into an upright state, the partition wall portion 33 faces in the vertical direction and the chain oil C enters the bulging space 42. become. Therefore, as shown in FIG. 8B, the liquid level of the chain oil C is below the communication port 34, and the chain oil C is prevented from leaking to the outside. This prevents the chain oil C from leaking to the outside even when the tank cap 32 is loose or when the tank cap 32 is forgotten to be mounted when cutting the wood using the chain saw 10. The cutting work can be performed efficiently.

  9 and 10 are cross-sectional views showing modifications of the tank 20, respectively. In the tank 20 shown in FIG. 9, an inner end 43 of the fuel supply guide cylinder 30 protrudes inward of the tank, and a partition wall portion 33 is provided at the inner end 43. A communication port 34 is formed between the end portion of the partition wall portion 33 and the top wall portion 26 of the tank 20. The bulging portion 41 protrudes toward the fuel filler port 31 in the same manner as the tank described above, and a bulging space 42 is formed inside.

  In the tank 20 shown in FIG. 10, the partition wall 33 is connected to the top wall 26, and the partition wall 33 faces the fuel supply port 31 of the fuel supply guide cylinder 30. A communication port 34 is formed between the partition wall portion 33 and the side wall portion 24. A bulging portion 41 that protrudes toward the fuel filler port 31 is provided on the side wall portion of the tank 20.

  As shown in FIGS. 9 and 10, since the partition wall 33 is formed so as to face the oil supply port 31, when injecting oil into the tank 20 with the oil supply port 31 facing upward, the communication port 34. The operator can easily know that the oil has been injected to the vicinity of, and can easily perform the injection operation. In addition, each tank 20 is provided with a bulging portion 41, and after the oil is poured into the tank 20 in a state where the portable work machine is laid down, the portable work machine is brought into an upright state. Then, since oil enters the bulging space 42, the liquid level is lower than the communication port 34, and oil can be reliably prevented from leaking from the inside of the tank 20.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, although the illustrated portable work machine is the chain saw 10, the present invention can also be applied to portable work machines other than the chain saw such as a trimming machine using a pair of blades as work tools. In addition, although the illustrated chain saw uses an electric motor as a drive source, the present invention can also be applied to a working machine using an engine as a drive source. Furthermore, the tank 20 shown in the figure is a tank for storing chain oil. However, in a portable working machine using an engine as a drive source, the tank of the present invention is also applied as a fuel tank for storing fuel oil. be able to.

DESCRIPTION OF SYMBOLS 10 ... Chain saw, 11 ... Work machine main body, 12 ... Guide bar, 13 ... Saw chain, 14 ... Main handle, 15 ... Sub handle, 16 ... Start switch, 17 ... Protection cover, 20 ... Tank, 21 ... Bottom wall part, 22 , 23 ... End wall portion, 24, 25 ... Side wall portion, 26 ... Top wall portion, 27 ... Storage chamber, 28 ... Tank body, 30 ... Refueling guide tube, 31 ... Refueling port, 32 ... Tank cap, 33 ... Partition wall 34, communicating port, 35 ... externally exposed portion, 36 ... inspection window, 37 ... outflow nozzle, 41 ... bulging portion, 42 ... bulging space, 43 ... inner end.

Claims (7)

A work machine main body provided with a work source provided with a drive source and driven by the drive source;
A storage chamber for storing oil such as lubricating oil or fuel oil, and a tank built into the working machine body;
An oil filler opening provided at the outer end and an oil supply guide tube to which a tank cap is detachably attached;
A portable work machine characterized in that a partition wall portion facing the fuel filler port is provided in the tank, and a communication port for communicating the fuel filler guide tube and the storage chamber is formed by the partition wall portion.   The portable work machine according to claim 1, wherein a bulging portion that protrudes toward the fuel filler port and communicates with the storage chamber is provided in the tank.   The portable type according to claim 1 or 2, wherein the partition wall portion is provided at an inner end of the oil supply guide tube, and the communication port is formed between the ceiling wall of the tank and the partition wall portion. Work machine.   3. The portable work machine according to claim 1, wherein the partition wall portion is provided continuously to the top wall portion of the tank, and the communication port is formed by the partition wall portion and the side wall portion of the tank. .   The portable work machine according to any one of claims 1 to 4, wherein the communication port has a width smaller than an inner diameter of the oil supply guide tube.   The portable work machine, wherein the fuel filler port is provided on a side surface of the work machine body in an upright state.   The said work tool is provided with the saw chain provided with the some blade part driven by the said drive source, The said tank accommodates the chain oil supplied to the said saw chain. The portable work machine according to Item 1.

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