JP2018008356A - Power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that there has been provided a charging-type screwing fastener or the like having lighting equipment for brightly lighting a screw fastening region, however, in a conventional T-type handle type screw fastener, a region which is most approximate to the screw fastening region is arranged while protruding to a sideway from a front part of a tool main body part, thus causing the impairment of the visibility of the screw fastening region, and also in an angle-type screw fastener, since the lighting equipment is arranged in a region apart from the screw fastening region, brightness is insufficient, and visibility is imparted, and then, it becomes necessary to avoid that the visibility of the screw fastening region is impaired by the lighting equipment.SOLUTION: Lighting equipment for brightly lighting a screw fastening region is of a type of an attachment-type lighting attachment 40 which is attachable and detachable to/from a tool main body part 10. Brightness is thereby secured by making a light source approximate to the screw fastening region, the lighting attachment 40 can be removed when unnecessary, and the visibility of the screw fastening region can be secured.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power tool such as a screwing machine used for screwing work, for example.

  The following patent document discloses a technique related to a hand-held screw tightener used at a construction site, for example. This type of power tool is an impact-type screw tightening tool that strikes in the screw tightening direction, and includes a tool main body equipped with an electric motor as a drive source, a grip portion gripped by a user, and a tip end portion of the grip portion. Is provided with a power supply unit. In the screw tightening machines disclosed in Patent Literatures 1 and 2, the grip portion is provided in a state of protruding sideways from the side portion of the tool main body portion. In the screw tightening machine disclosed in Patent Document 3, the tool body portion has a function as a grip portion. The power supply unit is a part that supplies power to the tool body. As disclosed in each patent document, when the power supply is a DC power supply, for example, a lithium ion battery with an output voltage of 18 V is attached. The grip portion incorporates a trigger type switch lever that is pulled by the fingertip of the hand held by the user and a switch body that is turned on by pulling the switch lever. When the switch body is turned on by turning on the switch lever, the electric motor is activated and the screw tightening work can be performed.

  As disclosed in Patent Documents 1 and 3, these screw tightening machines are provided with a lighting tool for illuminating the bit tip (screw tightening portion) brightly. The illuminating device is disposed at a portion that is as close as possible to the tip of the bit and is directly irradiated with light, so that the screwing operation in a dark place or the like can be performed efficiently.

Japanese Patent No. 5588801 Japanese Patent No. 5698546 JP 2014-2000884 A

  However, with respect to the conventional power tool, it is necessary to improve the lighting tool in particular in the following points. Conventionally, in order to irradiate light directly from an LED (light emitting diode) as a light source toward a screw tightening site, the lighting fixture has been arranged in a state of projecting sideways. For this reason, there existed a problem in which the visibility of output parts, such as a screwing site | part, was impaired because the lighting fixture was arrange | positioned in the state which obstruct | occluded a user's eyes | sight line. In addition, since the light source is arranged at a site away from the screw tightening site, the brightness of the screw tightening site is insufficient and the visibility needs to be further improved.

  This invention is made | formed in view of the conventional problem which concerns, and it aims at improving the visibility of the output part of the power tool by a lighting fixture.

  Said subject is solved by each following invention. 1st invention is the illumination attachment which has a light source which light-emits, and can be attached or detached to a power tool.

  According to 1st invention, the visibility of the output part of a power tool is ensured by removing an illumination attachment when it is unnecessary.

  A second invention is the illumination attachment according to the first invention, wherein the light source emits light upon receiving electric power from the power tool.

  According to the second invention, it is not necessary to provide a power source on the side of the illumination attachment, and in this respect, the illumination attachment can be made compact. By reducing the size of the illumination attachment, the visibility of the output part of the power tool can be improved even when attached to the power tool.

  3rd invention is the illumination attachment provided with the light source which irradiates light toward the output part of a power tool in 1st or 2nd invention.

  According to the third aspect of the invention, the output unit is brightly illuminated by the light emitted from the light source of the illumination attachment, and the convenience of work is achieved.

  4th invention is the power tool which attached the illumination attachment which concerns on any one of 1st-3rd invention so that attachment or detachment was possible.

  According to 4th invention, even if it is a case where the visibility of an output part is obstructed in the state which attached the illumination attachment, the visibility of an output part can be ensured by removing an illumination attachment.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, there is provided an angle-type power tool in which an axis of a spindle to which a tip cutter as an output portion is attached intersects with an output axis of an electric motor as a drive source.

  According to the fifth invention, for an angle-shaped power tool such as a disc grinder, for example, even if the visibility of the output unit is obstructed by the illumination fixture attachment, the visibility is obtained by removing the illumination fixture attachment. Can be secured.

  6th invention is the rotary impact tool which equipped the impact mechanism which strikes in a screw fastening direction internally. According to a sixth aspect of the present invention, a light source that includes a metal hammer case that houses the impact mechanism and a hammer case cover that covers the outer surface of the hammer case, and emits light toward the output unit by emitting light when energized. It is a rotary impact tool provided with the lighting fixture which has.

  According to the sixth aspect of the invention, for example, an illumination tool including an LED as a light source and a substrate on which the LED is mounted is disposed on the hammer case cover. For this reason, the control board which separated the board | substrate for lighting fixtures is reduced in size, and the freedom degree of the arrangement | positioning can be raised.

  According to a seventh invention, in the sixth invention, a rotary impact tool comprising a bumper for shock absorption between the illuminator and the output part, and the bumper having a light transmitting part that transmits the light of the illuminator. It is.

  According to 7th invention, the light of a lighting fixture is not obstruct | occluded by a bumper, and an output part (screw fastening site | part) can be illuminated sufficiently brightly.

  8th invention is the rotary impact tool which has arrange | positioned the permeation | transmission part on the line | wire which connects the light source and output part of a lighting fixture in 7th invention.

  According to the eighth aspect of the invention, the light emitted from the light source is irradiated to the output portion through the transmissive portion of the bumper, and thereby the screw tightening portion is brightly illuminated to facilitate the work.

  A ninth invention is the rotary impact tool according to any one of the sixth to eighth inventions, wherein the hammer case cover is provided with the illuminating device at an output portion side end portion thereof.

  According to the ninth aspect of the invention, the illuminating device is arranged as close as possible to the output unit. Since light is irradiated from a portion close to the output unit, the screw tightening portion is illuminated more brightly, and the work is facilitated.

  A tenth invention is a power tool including an organic EL as a light source that emits light.

  According to the tenth aspect, the organic EL can function as a lighting tool. The tenth invention can be widely applied to various power tools such as a screw tightening machine, an electric drill for drilling, a grinder, a multi-tool, a hammer drill, a sander, a polisher, a cutting machine, and a driving tool.

  An eleventh invention is the power tool according to the tenth invention, in which the organic EL is directed to the processing site.

  According to the eleventh aspect of the present invention, the processing site can be brightly illuminated by the light emitted from the organic EL, so that the work can be facilitated.

  According to a twelfth invention, in the tenth or eleventh invention, an impact mechanism that strikes in the screw tightening direction, a metal hammer case that houses the impact mechanism, and a resin hammer that covers the outer surface of the hammer case The power tool includes a case cover, an impact absorbing bumper located at the front of the hammer case cover, and a display unit for displaying an operation state of the tool main body. In the eleventh aspect of the invention, the hammer case cover, the bumper, or the display unit has an organic EL.

  According to the twelfth aspect, the hammer case cover, the bumper, or the display unit can be caused to emit light and function as a lighting tool.

  13th invention is a power tool provided with the translucent member which permeate | transmits light. In the tenth aspect of the invention, it is configured to be able to visually recognize a display part such as a logo mark through the translucent member.

  According to the thirteenth invention, it is possible to expand the display part of the character display part such as a logo mark to a part not conventionally used. Thereby, the freedom degree of the display site | part selection of display parts, such as a logo mark, can be raised, and the visibility of a display part, such as a character, can be ensured, aiming at size reduction of a power tool.

  A fourteenth aspect of the invention is a power tool according to the thirteenth aspect of the invention, wherein a character display unit is provided on the inner surface of the translucent member.

  According to the fourteenth aspect, it is possible to visually recognize the character display portion through the translucent member. By displaying the character display portion on the inner surface of the translucent member, the display of the character display portion is completed simultaneously with the assembly of the translucent member. In this respect, the display process of the character display portion is simplified. Can be achieved.

  According to a fifteenth aspect, in the thirteenth or fourteenth aspect, an impact mechanism that strikes in the screw tightening direction, a metal hammer case that houses the impact mechanism, and a resin hammer that covers the outer surface of the hammer case It is a power tool provided with a case cover and a bumper for shock absorption located at the front part of the hammer case cover. In the fifteenth aspect of the invention, the hammer case cover and / or the bumper is a translucent member. In the fifteenth aspect of the invention, the character display unit is visible through the hammer case cover and / or the bumper.

  According to the fifteenth aspect, with respect to the impact screw tightening machine (rotating impact tool) that strikes in the screw tightening direction, the same operational effects as the operational effects according to the thirteenth or fourteenth aspect can be obtained. Since the hammer case cover and / or bumper as the translucent member is located near the screw tightening part, in the screw tightening work performed while visually confirming the screw tightening part, a character or other display unit such as a logo is simultaneously displayed. This makes it easier to see the character, and in this respect, the visibility of the character display portion can be improved.

  A sixteenth aspect of the invention is a power tool according to any one of the thirteenth to fifteenth aspects of the invention, wherein the character display unit includes a reflective material such as metallic paint.

  According to the sixteenth invention, characters or the like on the display unit of characters or the like are written with a reflective material, or the characters or the like are framed with a reflective material, or the characters or the like are written with a reflective material as a background. The visibility of the equal display portion can be further enhanced.

1 is an overall longitudinal sectional view of a power tool according to a first embodiment of the present invention. It is a front perspective view of a power tool concerning a 1st embodiment of the present invention. It is a perspective view of a lighting attachment. This figure has shown the state seen from the left diagonal front. It is a longitudinal cross-sectional view of an illumination attachment. It is a perspective view of the rotary impact tool which concerns on 2nd Embodiment of this invention. It is a front view of the rotary impact tool which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view of the tool main-body part of the rotary impact tool which concerns on 2nd Embodiment. It is a front view of the board | substrate of the lighting fixture which concerns on 2nd Embodiment. It is the (IX) part enlarged view of FIG. 7, Comprising: It is a longitudinal cross-sectional view of the upper periphery of a lighting fixture. It is a cross-sectional perspective view around the wiring connection part of a lighting fixture. It is a front perspective view of the tool main-body part of a rotary impact tool. It is a front perspective view of the tool main-body part of a rotary impact tool. It is a whole perspective view of the rotary impact tool which concerns on 3rd Embodiment. It is a whole side view of the rotary impact tool which concerns on 3rd Embodiment. It is a longitudinal cross-sectional view of a display part. It is a front view of a display part.

  Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, in the first embodiment, an angle type impact screw tightening machine 1 (rotating impact tool) is exemplified as a power tool. The impact screw tightening machine 1 includes a substantially cylindrical tool body 10 that also serves as a grip part gripped by a user, an output unit 20 coupled to the front of the tool body 10, and a rear part of the tool body 10. A combined power supply unit 30 is provided. The user uses the impact screw tightening machine 1 by holding the tool body 10 with, for example, the right hand. As shown in the drawing, in the following description, the front / rear / left / right direction and the up / down direction are used with reference to the user. When viewed from the user, the output unit 20 is the front side, and the power supply unit 30 is the rear side (front side).

  The tool main body 10 has a configuration in which an electric motor 12 as a drive source is housed at substantially the center in the longitudinal direction of a substantially cylindrical main body housing 11. A large switch lever 13 is provided on the lower surface side of the tool body 10. A switch main body 14 is internally provided on the rear side of the main body housing 11. When the user pulls the switch lever 13 upward with the fingertip of the hand holding the tool body 10, the switch body 14 is turned on. When the switch body 14 is turned on, the electric motor 12 is activated. When the pulling operation of the switch lever 13 is released, the switch body 14 is turned off and the electric motor 12 is stopped.

  A set of planetary gear trains 15 and a striking mechanism 16 are incorporated on the front side of the main body housing 11. A drive gear 12 a attached to the output shaft of the electric motor 12 is meshed as a sun gear of the planetary gear train 15. A drive shaft portion 15 a is integrally provided on the carrier of the planetary gear train 15. The drive shaft portion 15 a is coupled to the striking mechanism 16. The striking mechanism 16 has two steel balls 16a interposed between a drive shaft portion 15a and a cylindrical hammer 16c arranged coaxially therearound, and urges the hammer 16c forward via a compression spring 16b. It has a configuration. The hammer 16c is integrally coupled to the anvil 16d disposed coaxially with the drive shaft 15a with respect to rotation by the urging force of the compression spring 16b.

  The two steel balls 16a are fitted in cam grooves provided in the drive shaft portion 15a. The cam groove extends in a direction inclined with respect to the axis of the drive shaft portion 15a. Further, the two steel balls 16a are fitted in restriction grooves provided on the inner peripheral surface side of the hammer 16c. The restriction groove extends along the axis of the hammer 16c. In the initial stage of screw tightening with a small screw tightening resistance, the hammer 16c and the anvil 16d are integrated for rotation, and the rotational power of the drive shaft portion 15a is output to the anvil 16d. When the screw tightening proceeds and a large rotational resistance (screw tightening resistance) is applied to the hammer 16c through the anvil 16d, the hammer 16c rotates relative to the drive shaft portion 15a and resists the compression spring 16b in the axial direction. Retreat to. When the rotational resistance applied to the hammer 16c is reduced away from the anvil 16d, the hammer 16c moves forward by the urging force of the compression spring 16b while rotating in the screw tightening direction. As the hammer 16c moves forward while rotating in the screw tightening direction, the anvil 16d is hit in the screw tightening direction and tightened.

  An output unit 20 is coupled to the front portion of the tool body 10 via the striking mechanism 16. An output portion housing 21 of the output portion 20 is coupled to the front portion of the main body housing 11. The output portion housing 21 is made of cast aluminum, and integrally includes an impact case portion 21a having substantially the same diameter as the main body housing 11, and a gear case portion 21b having a smaller diameter and bent downward in a side view. The planetary gear train 15 and the striking mechanism 16 are housed in the impact case portion 21a, and the gear train is housed in the gear case portion 21b. The anvil 16d of the striking mechanism 16 is rotatably supported on the front portion of the impact case portion 21a via a bearing 16e. The rotation output of the anvil 16d is transmitted to the output shaft 23 via the intermediate shaft 22. A drive-side bevel gear 22 a is provided at the front portion of the intermediate shaft 22.

  The intermediate shaft 22 is rotatably supported with respect to the impact case portion 21a via front and rear bearings 22b. The driving side bevel gear 22a is meshed with the driven side bevel gear 23a. The driven side bevel gear 23 a is coupled to the output shaft 23. Through the meshing of the drive side bevel gear 22a and the driven side bevel gear 23a, the output shaft 23 is supported so as to be rotatable around an axis orthogonal to the intermediate shaft 22 and thus the output shaft of the electric motor 12 (angle type). ). The output shaft 23 is rotatably supported by the front part of the gear case part 21b through the bearings 23b and 23c up and down. The intermediate shaft 22 and the output shaft 23 accommodated in the gear case portion 21b are accommodated in the gear case portion 21b, and these constitute a gear head portion. The front portion of the gear case portion 21b is opened downward. An output shaft 23 protrudes downward from the opening of the output unit housing 21. A bit attaching device 24 for attaching a screw tightening bit 25 as a tip tool is provided at the protruding portion.

  The power supply unit 30 provided at the rear portion of the tool main body 10 has a substantially flat plate shape that protrudes laterally from the main body housing 11. The battery pack 31 as a power source can be attached and removed by sliding up and down along the rear surface of the power source unit 30. FIG. 1 shows a state in which the battery pack 31 is attached to the power supply unit 30. The battery pack 31 can be removed by sliding downward from this attached state. The battery pack 31 is a highly versatile lithium ion battery that can be used for other power tools such as a screwing machine and a cutting tool, and can be repeatedly used by charging with a separately prepared charger. When the battery pack 31 is attached to the power supply unit 30, the battery pack 31 is electrically connected to the power supply circuit and can be supplied with power.

  The illumination attachment 40 can be attached to the impact screw fastening machine 1 of the present embodiment. As shown in FIGS. 1 and 2, the illumination attachment 40 is attached along the lower surface of the output unit 20. 3 and 4 show the illumination attachment 40 in a removed state. The illumination attachment 40 includes a base part 41, an illumination tool 42, and a connection part 44. The base part 41 is made of resin and is provided with a semicircular receiving part 41a and a holder part 41b at the front part thereof. The illumination attachment 40 is attached by sandwiching the rear portion (neck portion) of the gear case portion 21b having a smaller diameter than the impact case portion 21a between the receiving portion 41a and the holder portion 41b. The holder part 41 b is coupled to the receiving part 41 a by two fixing screws 43.

  A lighting fixture 42 is attached to the front portion of the base portion 41. The illuminating device 42 is an LED (light emitting diode) mounted on a substrate, and its irradiation direction is obliquely forward and downward, and is directed to the tip portion (screw tightening portion) of the screw tightening bit 25. The base part 41 extends from the rear part of the gear case part 21b to the vicinity of the rear part of the impact case part 21a. A connecting portion 44 is provided at the rear portion of the base portion 41. Although not shown in the drawing, the luminaire 42 is electrically connected to the connecting portion 44.

  The connection portion 44 is mechanically and electrically connected to a connection receiving portion 45 provided on the lower surface front portion of the tool main body portion 10. The connecting portion 44 is plugged into the connector receiving portion 45 (connector connection). The connection receiving portion 45 is supplied with electric power necessary for lighting the illuminating device 42 via an electric wiring (not shown). A part of the electric power of the battery pack 31 attached to the power supply unit 30 is supplied to the connection receiving unit 45.

  By connecting the connection portion 44 to the connection receiving portion 45 and sandwiching the output portion housing 21 therebetween and fixing the holder portion 41b to the receiving portion 41a with the two fixing screws 43, the illumination attachment 40 is tightened with impact screws. It can be attached to the machine 1. In the attached state, when the electric motor 12 is started by pulling the switch lever 13, the illuminator 42 is turned on at the same time, and the vicinity of the tip of the screw tightening bit 25 is brightly illuminated. The convenience of this is achieved.

  When illumination is unnecessary, the illumination attachment 40 can be removed. The illumination attachment 40 can be detached from the impact screwing machine 1 by removing the two fixing screws 43 to separate the holder portion 41b from the receiving portion 41a and pulling out the connecting portion 44 from the connecting receiving portion 45. In a state in which the illumination attachment 40 is removed, there is no portion that protrudes downward from the output portion housing 21, so that the visibility of the screw tightening bit 25 and the screw tightening portion is enhanced.

  According to the impact screw tightening machine 1 configured as described above, the illumination attachment 40 can be attached in the vicinity of the screw tightening bit 25. The illumination attachment 40 can brightly illuminate the screw tightening site and efficiently perform work in a dark place. The illumination attachment 40 can be easily removed when unnecessary. When the illumination attachment 40 is removed, there is no portion that protrudes from the output unit housing 21 to the periphery, so that the user can easily see the screw tightening bit 25 and the screw tightening portion.

  In the first embodiment described above, the angle type impact screw tightening machine 1 is exemplified as the power tool. However, the detachable illumination attachment 40 is an electric drill, a cutting machine, or other forms of electric tools, a driving tool, or the like. It can be widely applied to power tools such as hydraulic devices such as hydraulic / pneumatic devices and handy cleaners. In the case of an electric power tool, the illumination attachment 40 exemplified for the AC power source power tool powered by a commercial 100V AC power source is applied in addition to the DC power source type powered by the illustrated battery pack 31 or the like. Can do.

  5 to 7 show another form of impact screw tightening machine 50 as a power tool. The impact screwing machine 50 is a pistol type screwing machine in which a grip part 53 extends from a side part of a tool body part 52 having an electric motor 51 as a drive source. A power supply unit 54 is provided at the tip of the grip unit 53. Although not shown in the drawing, a battery pack as a power source is attached to the power source unit 54. A trigger-type switch lever 53 a is provided on the grip 53. A switch body 53b is internally provided behind the switch lever 53a. When the switch lever 53a is pulled by the fingertip of the hand holding the grip 53, the switch body 53b is turned on and the electric motor 51 is activated.

  As shown in FIG. 7, the tool main body 52 has a configuration in which an electric motor 51, a planetary gear train 55, a striking mechanism 56, and an output unit 57 are housed in a main body housing 58 and a hammer case 59 in order from the rear side. The rear body housing 58 is a resin housing, and the rear side thereof is also closed by a resin lid 58a. An electric motor 51 and a planetary gear train 55 are mainly housed inside the main body housing 58. The rotational output of the electric motor 51 is decelerated by the planetary gear train 55 and transmitted to the striking mechanism 56. As the electric motor 51, a DC brushless motor having a compact machine length direction (motor axial direction) is used. By using a DC brushless motor, the impact screw tightening machine 50 is made compact (downsized) and increased in output in the machine direction.

  A metal hammer case 59 is coupled to the front side of the main body housing 58. A striking mechanism 56 is mainly housed inside the hammer case 59. The anvil of the striking mechanism 56 corresponds to the output unit 57. The striking mechanism 56 operates in the same manner as the striking mechanism 16 of the first embodiment, and has a function of striking the output portion 57 in the screw tightening direction when the screw tightening torque is increased. A front portion of the output portion 57 corresponding to the anvil of the striking mechanism 56 protrudes from the hammer case 59. A bit attachment device 61 for attaching the screw tightening bit 60 to the protruding portion is provided.

  The hammer case 59 is coupled to each other with its rear side approaching the front inner peripheral side of the main body housing 58. A hammer case cover 62 is attached to the outer peripheral surface of the hammer case 59 that is one step lower than the thickness of the main body housing 58. The hammer case cover 62 is made of a transparent resin and has a heat insulating function to block the heat generation of the hammer case 59. The front part of the hammer case 59 protrudes from the front part of the hammer case cover 62. As shown in FIG. 11, an elastic resin bumper 63 is attached to the front portion of the hammer case 59 protruding from the front portion of the hammer case cover 62. 5 to 7 show the bumper 63 removed.

  A lighting tool 65 is provided at the front end of the hammer case cover 62. As shown in FIG. 8, the illuminating device 65 of the second embodiment includes an annular substrate 65b on which three light emitting portions 65a are mounted. LEDs (light emitting diodes) are used for the three light emitting portions 65a. The three light emitting portions 65a are arranged at the three-way positions in the circumferential direction of the substrate 65b. A part of the power of the battery pack attached to the power supply unit 54 is supplied to the board 65b as a power supply. The substrate 65b is provided with positive and negative lead wires 66 and 67 for supplying power. Connection pin portions 66 a and 67 a are provided at the tip ends of the two lead wires 66 and 67.

  As shown in FIG. 10, the two lead wires 66 and 67 of the board 65b are connected to the power supply circuit side by inserting the connection pin portions 66a and 67a into the connector portion 68 provided on the front end surface of the main body housing 58, respectively. . The two lead wires 66 and 67 are routed rearward through a slight gap between the hammer case 59 and the hammer case cover 62 and connected to the connector portion 68. The battery pack power is supplied to the board 65b through positive and negative lead wires 66 and 67 connected to the connector portion 68. When the electric motor 51 is started by pulling the switch lever 53a, power is supplied to the substrate 65b through the lead wires 66 and 67, so that the three light emitting portions 65a are turned on. When the pulling operation of the switch lever 53a is released and the electric motor 51 is stopped, the three light emitting portions 65a are turned off. The lead wires 66 and 67 may be embedded in the hammer case cover 62. In this case, the connection pins 66 a and 67 a are protruded from the rear end face of the hammer case cover 62 and the lead wires 66 and 67 are embedded, so that the hammer case cover 62 is assembled to the outer periphery of the hammer case 59. The connection work of the lead wires 66 and 67 can be completed.

  The illuminator 65 is disposed in a state of being sandwiched between the front part of the hammer case cover 62 and the rear part of the bumper 63 with the front part of the hammer case 59 inserted through the inner peripheral side of the substrate 65b. Yes. As shown in FIG. 9, an engagement edge 62 b is provided at the front end of the hammer case cover 62. The engaging edge 62b is provided in a state of projecting toward the inner peripheral side with a slight width. The engaging edge portion 62 b is fitted in an engaging groove portion 59 a provided on the outer peripheral surface of the front portion of the hammer case 59. Thereby, the positional deviation in the motor axial direction is prevented mainly on the front side of the hammer case cover 62 with respect to the hammer case 59. On the rear side of the engaging edge portion 62b, an engaging wall portion 62c is also provided that projects to the inner peripheral side. As shown in the figure, the engaging wall portion 62c is almost superimposed on the front surface of the substrate 65b, and almost the entire surface of the substrate 65b is covered with the hammer case cover 62. However, the three light emitting portions 65a are protruded forward through the insertion holes 62d of the engaging wall portion 62c. As a result, the displacement of the substrate 65b with respect to the hammer case cover 62 mainly in the motor axial direction is prevented, and the substrate 65b is protected from dust. As described above, the engaging wall portion 62c of the hammer case cover 62 also functions as a dust-proof cover for the substrate 65b.

  The bumper 63 has an annular shape, and is attached along the front end surface of the hammer case cover 62 in a state where the front portion of the impact case 59 is inserted through the inner peripheral side thereof. The bumper 63 is attached so as to cover the lighting fixture 65 over the entire circumference. The bumper 63 has a transmission part (transparent part) when the light emitted from the light emitting part 65a is transmitted forward. In the second embodiment, since the bumper 63 is made of a transparent resin, the whole functions as a transmission part. Since the bumper 63 has the transmission part, the light emitted from the three light emitting parts 65a is irradiated forward, whereby the screw tightening bit 60 and its periphery (screw tightening part) are brightly illuminated, and the screw tightening work is facilitated. Figured.

  According to the impact screw tightening machine 50 of the second embodiment configured as described above, the illuminator 65 having the three light emitting portions 65a includes the front portion of the heat-insulating hammer case cover 62 and the shock absorbing bumper. 63 is arranged between the rear part of 63 and the state which does not protrude to the side. For this reason, the visibility of the user with respect to the screw tightening bit 60 and its periphery is not hindered by the lighting tool 65.

  As shown in FIG. 11, a character display portion 62 a is provided on the upper surface of the resin hammer case cover 62. In the character display section 62a, for example, a logo mark, a design, a product name, a model, a usage precaution, and the like can be displayed. A logo mark or the like can be displayed simultaneously by the concave-convex shape when the hammer case cover 62 is molded. In addition, a logo mark or the like may be displayed by two-color molding, printing or pasting, and a metal plate displaying the logo mark or the like may be embedded in the hammer case cover 62 and displayed.

  FIG. 12 shows an impact screw tightening machine 50 in which a character display unit 63a is provided on the bumper 63. In addition to displaying the logo mark, the design, the product name, and the model, various precautions can be displayed on the character display portion 63a of the bumper 63. These are displayed when the bumper 63 is molded, two-color molding, Printing, pasting, and displaying a metal plate can be embedded. Further, the illustrated character etc. display portions 62a and 63a can include a reflective material. For example, by displaying characters or the like on a reflective material such as a metal plate, displaying the characters or the like themselves with a reflective material, and bordering the characters or the like with a reflective material, the visibility of the display portion of the characters or the like can be further enhanced. .

  As described above, by using a DC brushless motor that is compact in the motor axial direction as the electric motor 51, the tool main body 52 can be made compact (downsized) and high in output in the machine length direction. By reducing the size of the tool main body 52, the area of the display portion such as the logo mark on the left and right sides of the tool main body 52 becomes narrower in the machine length direction. If the display area of the logo mark or the like is narrowed, the logo mark must be reduced, and the amount of information to be displayed such as precautions must be reduced. As described above, the logo mark on the left and right sides of the main body housing 58 is set by setting the character mark display portions 62a and 63a for displaying the logo mark, product name, model, various precautions, etc. on the hammer case cover 62 and the bumper 63. It is possible to compensate for the narrowing of the equal display section.

  FIGS. 13 and 14 show an impact screw tightening machine 70 according to the third embodiment. As in the second embodiment, the impact screw tightening machine 70 of the third embodiment includes a tool main body 71 including an electric motor 51, a planetary gear train 55, a striking mechanism 56, and an output unit 57, and a grip part 72 held by a user. And the power supply part 73 for attaching the battery pack 74 as a power supply is provided. 13 and 14 show a state in which the bit attachment device 61 provided in the output portion 57 is protruded from the front portion of the tool main body portion 71. The screw fastening bit 60 is attached to the output portion 57 by the bit attachment device 61.

  A switch lever 72 a for starting the electric motor 51 is provided on the upper front surface of the grip portion 72. A power supply unit 73 is provided below the grip unit 72. The power supply unit 73 has a generally flat plate shape that projects mainly from the lower part of the grip part 72 to both the front and left and right. A battery pack 74 is attached to the lower surface of the power supply unit 73. The battery pack 74 can be removed by sliding to the front side with respect to the power source unit 73 and can be attached by sliding to the rear side.

  A display unit 75 is provided on the upper surface of the power supply unit 73. In the display unit 75, an organic EL (organic electroluminescence, organic light emitting diode) is used as the display display 76. A controller 79 is housed below the display unit 75. The controller 79 is a resin-molded body in which a substrate including a power supply circuit and a motor control circuit is housed in a rectangular bottom shallow case, and is incorporated along the lower surface side of the power supply unit 73. As shown in FIG. 15, power is supplied to the display 76 through two lead wires 77 and 78 extending upward from the power supply circuit of the controller 79. As shown in FIG. 16, the display 76 has a mode switching button 75a for switching the operation mode, a striking force display portion 75b for notifying the striking force, and a remaining capacity display portion 75c for notifying the remaining capacity of the battery pack 74. Is provided.

  The display 76 that is an organic EL has a function as lighting (organic EL lighting). As shown in FIG. 14, the light emitted from the display 76 is directed toward the screw tightening bit 60 positioned obliquely above and the periphery thereof. From this, the display unit 75 in the third embodiment, in addition to various notification functions, illuminates the screw tightening portion brightly like the illumination attachment 40 in the first embodiment and the illumination tool 65 in the second embodiment. As a function.

  According to the third embodiment described above, light is emitted from the display unit 75 provided in the power supply unit 73 to the periphery of the screw tightening bit (periphery of the processing site). For this reason, the screw tightening operation can be efficiently performed in a dark place by illuminating the screw tightening portion brightly without impairing the visibility of the user's screw tightening portion.

  Various modifications can be further added to the embodiments described above. For example, the structure which supplies the electric power of the illumination attachment 40 which concerns on 1st Embodiment, the lighting fixture 65 which concerns on 2nd Embodiment, and the display display 76 which concerns on 3rd Embodiment from the power supply (battery pack) of a power tool was illustrated. However, it is good also as a structure provided with original power supplies, such as a dry cell and a button battery, respectively.

  Moreover, although the impact-type screw fastening machine (rotary impact tool) was illustrated as a power tool, especially the detachable illumination attachment 40 according to the first embodiment and the organic EL according to the third embodiment are functioned as a lighting tool. The invention is widely applied to power tools of other forms such as electric drills for drilling, cutting machines such as reciprocating saws, disc grinders, compressed air driven nailing machines, gardening tools such as lawn mowers and mowers. Furthermore, even if it is other than a power tool, it can be applied to various electric devices such as a blower, a handy cleaner, a fan, a compressor, a lighting device, a coffee maker, and a radio.

  In the second embodiment, the illuminator 65 in which the light emitting unit 65a is mounted on the substrate 65b is illustrated as being sandwiched and held between the impact case cover 59 and the bumper 63. However, the illuminator 65 is a resin for the impact case cover. It is good also as a structure integrated and integrated at the time of shaping | molding.

  It can be set as the impact screwing machine provided with both the lighting fixture 65 of 2nd Embodiment, and the lighting fixture (display display) which concerns on 3rd Embodiment.

  In the first to third embodiments, a rechargeable power tool (impact screw tightening machine) that uses a battery pack as a power source is illustrated. However, a lighting that illustrates a power tool (AC machine) that uses a commercial 100V AC power source as a power source. Tools can be applied.

1 ... Impact screw tightening machine (first embodiment)
DESCRIPTION OF SYMBOLS 10 ... Tool main body part 11 ... Main body housing 12 ... Electric motor, 12a ... Drive gear 13 ... Switch lever 14 ... Switch main body 15 ... Planetary gear train, 15a ... Drive shaft part 16 ... Impact mechanism 16a ... Steel ball, 16b ... Compression spring , 16c ... hammer, 16d ... anvil, 16e ... bearing 20 ... output part 21 ... output part housing 21a ... impact case part, 21b ... gear case part 22 ... intermediate shaft 22a ... drive side bevel gear, 22b ... bearing 23 ... output shaft 23a ... driven side bevel gears, 23b, 23c ... bearing 24 ... bit mounting device 25 ... screw fastening bit 30 ... power supply part 31 ... battery pack 40 ... lighting attachment 41 ... base part, 41a ... receiving part, 41b ... holder part 42 ... Illuminator 43 ... Fixing screw 44 ... Connection part 45 ... Connection receiving part 50 ... Impact screw tightening machine (second embodiment)
DESCRIPTION OF SYMBOLS 51 ... Electric motor 52 ... Tool main-body part 53 ... Grip part, 53a ... Switch lever, 53b ... Switch main body 54 ... Power supply part 55 ... Planetary gear train 56 ... Impact mechanism 57 ... Output part 58 ... Main body housing, 58a ... Lid 59 ... Hammer case, 59a ... engagement groove portion 60 ... screw tightening bit 61 ... bit mounting device 62 ... hammer case cover 62a ... character display portion, 62b ... engagement edge portion, 62c ... engagement wall portion, 62d ... insertion hole 63 ... Bumper, 63a ... Character display unit 65 ... Illuminator, 65a ... Light emitting unit, 65b ... Substrate 66, 67 ... Lead wire, 66a, 67a ... Connection pin part 68 ... Connector part 70 ... Impact screw tightening machine (third embodiment) )
71 ... Tool body 72 ... Grip 73 ... Power supply 74 ... Battery pack 75 ... Display 75a ... Mode switching button 75b ... Strike force display 75c ... Remaining capacity display 76 ... Display (organic EL)
77, 78 ... Lead wire 79 ... Controller

Claims (16)

Lighting attachment that has a light source that emits light and is detachable from the power tool. The illumination attachment according to claim 1, wherein the light source emits light by receiving electric power from the power tool. It is an illumination attachment of Claim 1 or 2, Comprising: The illumination attachment provided with the light source which irradiates light toward the output part of the said power tool. The power tool which attached the illumination attachment described in any one of Claims 1-3 so that attachment or detachment was possible. 5. The power tool according to claim 4, wherein an axis of a spindle, to which a tip cutter as an output unit is attached, intersects with an output axis of an electric motor as a drive source. A rotary impact tool equipped with an impact mechanism that strikes in the screw tightening direction, comprising a metal hammer case that houses the impact mechanism, and a hammer case cover that covers the outer surface of the hammer case, A rotary impact tool including a lighting tool having a light source that emits light when energized and emits light toward an output unit. 7. The rotary impact tool according to claim 6, wherein a bumper for shock absorption is provided between the illuminator and the output unit, and a light transmission part that transmits light of the illuminator is provided in the bumper. Rotating hammer tool. The rotary impact tool according to claim 7, wherein the light transmission part is arranged on a line connecting the light source of the illuminator and the output part. 9. The rotary impact tool according to claim 6, wherein the illumination tool is provided at an output portion side end of the hammer case cover. A power tool equipped with organic EL as a light source that emits light. The power tool according to claim 10, wherein the organic EL is directed to a processing site. The power tool according to claim 10 or 11, wherein an impact mechanism that strikes in a screw tightening direction, a metal hammer case that houses the impact mechanism, and a resin hammer case cover that covers an outer surface of the hammer case And an impact-absorbing bumper located at the front part of the hammer case cover, and a display unit for displaying the operating state of the tool main body, and the organic material in the hammer case cover or the bumper or the display unit. Power tool with EL. A power tool including a translucent member that transmits light, the power tool being able to visually recognize a display portion such as a logo mark through the translucent member. The power tool according to claim 13, wherein the character display unit is provided on an inner surface of the translucent member. 15. The power tool according to claim 13, wherein an impact mechanism that strikes in a screw tightening direction, a metal hammer case that houses the impact mechanism, and a resin hammer case cover that covers an outer surface of the hammer case And an impact-absorbing bumper located at the front portion of the hammer case cover. The hammer case cover and / or the bumper is used as the translucent member, and the hammer case cover and / or the bumper is transmitted. A power tool capable of visually recognizing the character display unit. The power tool according to any one of claims 13 to 15, wherein a reflective material is included in the character display portion.

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