CN113747990A

CN113747990A - Movable working machine

Info

Publication number: CN113747990A
Application number: CN202080031859.2A
Authority: CN
Inventors: 藤森崇太; 横山聪哉; 井户田淳
Original assignee: Nitto Kohki Co Ltd
Current assignee: Nitto Kohki Co Ltd
Priority date: 2019-05-10
Filing date: 2020-03-23
Publication date: 2021-12-03
Also published as: DE112020002313T5; JPWO2020230454A1; WO2020230454A1; AU2020274440B2; AU2020274440A1; JP7213340B2

Abstract

A portable working machine in which a working tool is irradiated from the side and a lighting device is not affected by chips. A portable working machine (1) is provided with an illumination device (46) in a working machine main body (10). The illumination device (46) includes an LED element (52) and a light guide member (54). Light (L) from the illumination device (46) is emitted from a window (64) on the lower surface (10a) of the machine tool body (10). The light (L) is obliquely emitted toward a side surface (reflection surface) (12a) on the front side of the fixing portion (12), and is reflected by the side surface (12a) to irradiate the periphery of the tip end portion (36a) of the center pin (36) of the ring cutter (16).

Description

Movable working machine

Technical Field

The present invention relates to a portable working machine, and more particularly, to a portable working machine including an illumination device that illuminates a distal end portion of a work tool.

Background

The mobile work machine is brought into a work site for use. The portable working machine is used in various environments, and is sometimes used in a dark room or at night in an environment without external lighting. In order to be usable even in such a dark environment, a portable working machine including a lighting device has been developed. For example, patent documents 1 and 2 disclose a portable piercing machine in which a lighting device is provided at a fixing portion having an electromagnet for fixing a portable working machine to a workpiece, and a ring cutter can be irradiated from a side. The annular cutter has an annular blade and a center pin extending along the rotation axis of the blade, and the annular cutter is positioned by bringing the tip of the center pin into contact with the center of the processing site of the workpiece. Therefore, when the work place is dark, the front end portion of the center pin and the periphery thereof need to be illuminated. In the case of irradiating light from above, the tip end portion of the center pin is blocked by the shadow of the blade portion, and it is difficult to irradiate light to the tip end portion of the center pin, but in patent documents 1 and 2, by providing the lighting device to the fixed portion and irradiating light to the center pin from the side direction, the tip end portion of the center pin and its periphery can be illuminated without being obstructed by the blade portion.

Prior art documents

Patent document

Patent document 1: japanese patent No. 4474155

Patent document 2: specification of U.S. Pat. No. 9889508

Disclosure of Invention

Problems to be solved by the invention

When a machining operation is performed by a working tool such as a ring cutter, chips generated by the machining fly sideways from the working tool due to the rotation of the working tool. Further, the elongated chips attached to the work tool may rotate together with the work tool. When the illumination device is provided at the fixing portion at a position lateral to the working tool as described above, the chips may collide with the illumination device. Thus, the light exit surface of the lighting device may be damaged or dirty, and thus sufficient light may not be emitted.

Accordingly, an object of the present invention is to provide a portable working machine that can illuminate a working tool from the side and can protect an illumination device from chips.

Means for solving the problems

That is, the present invention provides a movable type working machine in which,

the movable working machine includes:

a machine tool body having a power unit and a tool mounting unit, the tool mounting unit being rotated by the power unit;

a reflecting surface arranged to face the work tool at a position lateral to the work tool, the work tool being attached to the tool attachment portion and extending to an outside of the work machine main body; and

and an illumination device that is arranged to emit light obliquely with respect to the reflection surface, and that irradiates the tip end portion of the work tool and the periphery of the tip end portion with light that has been reflected by the reflection surface.

In this portable working machine, the light reflected by the reflecting surface located at the side of the working tool irradiates the periphery of the distal end portion of the working tool. That is, since the distal end portion of the work tool is irradiated from the side, the distal end portion is not sufficiently irradiated in the shadow of the other portion of the work tool. Further, since the reflected light is irradiated, it is not necessary to dispose the illumination device at a position lateral to the working tool, and the illumination device can be disposed at a position away from the distal end portion of the working tool and the workpiece and not easily affected by chips, so that it is possible to prevent the illumination device from being damaged or stained by chips generated by the working operation.

Further, it is possible to provide:

the tool mounting portion is capable of moving up and down,

the movable working machine further includes a fixing portion that is located below the working machine main body and fixes the working machine main body to the workpiece. Further, it is possible to provide: the illumination device is disposed in the work machine body, and light of the illumination device is emitted from a lower surface of the work machine body.

In this case, it is possible to provide: the reflecting surface is a part of a side surface of the fixing portion.

With this configuration, it is not necessary to provide a separate member having a reflecting surface, and the structure can be simplified.

Further, it is possible to provide:

the tool mounting part is positioned in front of the fixing part,

the illumination device is disposed at a position shifted to one side in the lateral direction with respect to the work tool attached to the tool attachment portion, and emits light toward the other side in the lateral direction and rearward from the lower side to be irradiated onto the reflection surface.

The following can be set: by providing the tool mounting portion, the front side surface of the fixing portion as the reflecting surface, and the illumination device in such a positional relationship, the periphery of the distal end of the work tool can be appropriately illuminated by the light emitted from the illumination device.

The following can be set: the illumination device diffuses and emits light, and the light reflected by the reflection surface is spread and irradiated to the tip of the work tool and the periphery of the tip. The degree of light diffusion is appropriately designed as necessary.

Further, it is possible to provide: the power tool is an annular cutter having an annular blade and a center pin extending in an up-down direction through a center of the blade, and a tip end portion of the center pin is the tip end portion of the power tool.

Although the center pin extends downward than the annular blade portion to position the annular blade portion with respect to the processing portion of the workpiece, since the tip end portion of the center pin is irradiated with the light emitted from the illumination device by reflecting the light on the reflection surface located at the side position of the work tool, the tip end portion of the center pin is not in the shadow of the blade portion and is sufficiently irradiated with the light.

Further, it is possible to provide: the illumination device includes a light source and a light guide member that directs light emitted from the light source toward the reflection surface.

By using the light guide member, it is easy to design so that light from the light source is directed to the reflection surface in an appropriate state.

Hereinafter, an embodiment of the portable working machine according to the present invention will be described with reference to the drawings.

Drawings

Fig. 1 is a side view of a movable working machine according to an embodiment of the present invention.

Fig. 2 is a plan view of the movable type working machine of fig. 1.

Fig. 3 is a sectional view taken along line III-III of fig. 2.

Fig. 4 is a cross-sectional view taken along line IV-IV of fig. 2.

Fig. 5 is a cross-sectional view taken along line V-V of fig. 2.

Fig. 6 is a perspective view of the illumination device provided in the portable working machine of fig. 1, as viewed obliquely from above.

Fig. 7 is a perspective view of the lighting device of fig. 6 viewed obliquely from below.

Fig. 8 is a front view of the lighting device of fig. 6.

Fig. 9 is a left side view of the lighting device of fig. 6.

Fig. 10 is a perspective view of a front portion of the portable working machine of fig. 1 viewed obliquely from below.

Fig. 11 is a perspective view of a front portion of the portable working machine of fig. 1 viewed from obliquely above.

Detailed Description

As shown in fig. 1 and 2, the portable working machine 1 according to one embodiment of the present invention includes a working machine main body 10, a fixing portion 12 fixed to a lower side of the working machine main body 10, and a battery 14 detachably mounted to a rear side of the working machine main body 10. As shown in fig. 3, the work machine main body 10 includes: a tool mounting portion 18 for detachably mounting the annular cutter 16 (tool) at a position forward of the fixing portion 12; and a power unit 19 for rotationally driving the work tool mounting unit 18. The power unit 19 mainly includes a motor 20 and a gear mechanism 22 composed of a plurality of gears. The work tool mounting portion 18 is configured to be movable up and down by pivotally moving a lever 24 attached to a side surface of the machine tool body 10, thereby moving the ring cutter 16 up and down. The fixing portion 12 includes: a first electromagnet 28 having a first coil 26 in the shape of a ring; and a second electromagnet 32 also having a second coil 30 in the form of a ring. When power is supplied to the first coil 26 and the second coil 30 in a state where the portable working machine 1 is mounted on the magnetic material, the working machine main body 10 is fixed to the magnetic material by the magnetic attraction force generated by the first electromagnet 28 and the second electromagnet 32. The movable type working machine 1 is a punching machine as follows: in a state where the machine tool body 10 is fixed to the workpiece M made of a magnetic material by the first electromagnet 28 and the second electromagnet 32, the annular cutter 16 rotated by the power unit 19 is brought into contact with the workpiece M, thereby piercing the workpiece M. The annular cutter 16 includes an annular blade 34 and a center pin 36 extending in the vertical direction through the center of the blade 34.

As shown in fig. 1, a motor drive switch 38 for starting driving of the motor 20, a motor stop switch 40 for stopping driving of the motor 20, and an electromagnet switch 42 for starting and stopping driving of the first electromagnet 28 and the second electromagnet 32 are disposed on a side surface of the machine main body 10. An illumination switch 44 for turning on and off an illumination device 46 described later is further disposed on the side surface of the work machine main body 10. These

switches

38, 40, 42, and 44 are all momentary switches that are turned on only when pressed, and return to the off state when the hand is removed.

As shown in fig. 3, a first magnetic sensor 48 and a second magnetic sensor 50 are further attached to the fixed unit 12. The first magnetic sensor 48 is disposed above the first electromagnet 28, and measures the magnetic flux density around the first electromagnet 28. The second magnetic sensor 50 is disposed above the second electromagnet 32, and measures the magnetic flux density around the second electromagnet 32. The portable working machine 1 controls the power supplied to the first electromagnet 28 and the second electromagnet 32 or determines whether or not a necessary and sufficient magnetic attraction force is obtained based on the output values of the first magnetic sensor 48 and the second magnetic sensor 50, and displays the result on the LED display unit.

As shown in fig. 4 and 5, the illumination device 46 is disposed in the machine main body 10 at a position offset leftward (leftward as viewed in fig. 5 and 8) with respect to the annular cutter 16 when viewed from the front. The illumination device 46 has an LED element 52 as a light source and a light guide member 54 formed of a transparent resin material. As also shown in fig. 6 to 9, the light guide member 54 has an insertion hole 56 into which the LED element 52 is inserted. The bottom surface of the insertion hole 56 is an inclined incident surface 58, and light emitted from the LED element 52 is mainly incident into the light guide member 54 from the incident surface 58. The incident surface 58 is inclined downward as a whole toward the front (right as viewed in fig. 4 and 9) and the left (left as viewed in fig. 5 and 8) as viewed from the front of the mobile working machine 1. The incident surface 58 has a convex shape slightly protruding upward toward the LED element 52, and can suppress the diffusion of light incident on the light guide member 54 to some extent. The light incident into the light guide member 54 from the incident surface 58 is emitted from the emission surface 60, which is the bottom surface of the light guide member 54. The emission surface 60 is a surface larger than the incidence surface 58 and inclined in the opposite direction to the incidence surface 58. That is, the emission surface 60 is inclined downward toward the rear (leftward as viewed in fig. 4 and 9) and toward the right (rightward as viewed in fig. 5 and 8) as viewed from the front.

As shown in fig. 4, 5, 10, and 11, the light L emitted from the illumination device 46 passes through a transparent cover 62 attached to the machine main body 10, and is emitted from a window 64 on the lower surface 10a of the machine main body 10. As the incident surface 58 and the emission surface 60 are inclined as described above, the light emitted from the LED element 52 is refracted on the incident surface 58 and the emission surface 60. The light L emitted from the emission surface 60 is diffused to some extent and is irradiated toward the right side and the lower side and the rear side to the side surface 12a in front of the fixing portion 12. The side surface 12a faces the ring cutter 16 at a position lateral to the ring cutter 16, the ring cutter 16 extends to the outside of the machine tool body 10, and the light L reflected by the side surface 12a is radiated to the tip end 36a of the center pin 36 of the ring cutter 16 and its periphery. That is, in the portable working machine 1, the light L emitted from the illumination device 46 is irradiated obliquely downward with respect to the side surface 12a of the fixing portion 12 functioning as a reflection surface, and the light L reflected by the side surface 12a is irradiated to the tip end portion 36a of the center pin 36 of the ring cutter 16 and the periphery thereof. In this way, even in a state where the tip end portion 36a of the center pin 36 abuts on the processing portion of the workpiece M, the tip end portion 36a and the periphery thereof are not shielded by the shadow of the ring cutter 16 and illuminated. Further, the illumination device 46 is located above the machining site, and there is no fear that the emission surface 60 and the cover 62 of the light guide member 54 are damaged or soiled by the chips generated during the boring process by the ring cutter 16.

The embodiments of the present invention have been described above, but the present invention is not limited to the embodiments. For example, the work tool may be a working machine using a drill, instead of the annular cutter. Since the tip angle of the drill is usually 120 degrees, particularly when a drill having a large diameter is used, the tip of the drill may not be irradiated by illumination from above. Further, the fixing portion for fixing the tool body may be not a member using an electromagnet, but may be mechanically fixed by a vise or the like, for example, using magnetic attraction by a permanent magnet or vacuum attraction by a vacuum device. Alternatively, a hand-held work machine that does not have a fixed portion and is used by being held by a hand may be used. Further, the reflecting surface does not need to be a side surface of the fixing portion, and for example, a part of the machine tool body may be extended to a position lateral to the work tool to be used as the reflecting surface, or another member having a surface serving as the reflecting surface may be attached to the machine tool body and the fixing portion. The light guide member of the illumination device may not have the above-described shape, and may be configured by combining optical components such as a plurality of lenses, for example, and may be configured by an optical fiber. Alternatively, the illumination device may be configured not to include the light guide member, and may be configured to directly irradiate the light from the light source onto the reflection surface. Further, a plurality of lighting devices may be arranged to illuminate the tip end portion of the work tool from a plurality of directions. In the above embodiment, the battery is used as the power source, but may be connected to an external power source such as an AC power source.

Description of reference numerals:

1 Movable working machine

10 working machine body

10a lower surface

12 fixed part

12a side surface (reflecting surface)

14 cell

16 Ring cutter (working tool)

18 working tool mounting part (tool mounting part)

19 power unit

20 Motor

22 gear mechanism

24 bar

26 first coil

28 first electromagnet

30 second coil

32 second electromagnet

34 blade part

36 center pin

36a front end portion

38 motor drive switch

40 Motor stop switch

42 electromagnet switch

44 light switch

46 illumination device

48 first magnetic sensor

50 second magnetic sensor

52 LED component (light source)

54 light guide member

56 into the hole

58 plane of incidence

60 emitting surface

62 cover

64 window

L light

M is a workpiece.

Claims

1. A movable type working machine, wherein,

the movable working machine includes:

2. The movable type working machine according to claim 1,

the tool mounting portion is capable of moving up and down,

the movable working machine further includes a fixing portion that is located below the working machine main body and fixes the working machine main body to the workpiece.

3. The movable type working machine according to claim 2, wherein,

the illumination device is disposed in the work machine body, and light of the illumination device is emitted from a lower surface of the work machine body.

4. The movable type working machine according to claim 2 or 3,

the reflecting surface is a part of a side surface of the fixing portion.

5. The movable type working machine according to claim 4, wherein,

the tool mounting part is positioned in front of the fixing part,

6. The movable type working machine according to any one of claims 1 to 5,

the illumination device diffuses and emits light, and the light reflected by the reflection surface is spread and irradiated to the tip of the work tool and the periphery of the tip.

7. The movable type working machine according to any one of claims 1 to 6,

the power tool is an annular cutter having an annular blade and a center pin extending in an up-down direction through a center of the blade, and a tip end portion of the center pin is the tip end portion of the power tool.

8. The movable type working machine according to any one of claims 1 to 7,

the illumination device includes a light source and a light guide member that directs light emitted from the light source toward the reflection surface.