JP2009061738A - Portable cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress an increase in the number of components, and to simplify assembly work in a portable cutting machine provided with a function for removing cut powder from a processing part and a processing part lighting function. <P>SOLUTION: An air path continuing from a fan housing part provided at a housing to the forward of a saw cover body, and an opening 81e opening toward a suggestion section 67 provided at a base are provided at the upper part of a casing 81 provided from the inside of the housing 2 at the cutting direction front side of the saw cover body 41. On the other hand, a light holding part for holding an LED 82, and a connecting channel guiding an electric cable provided outside the air path and connected to a connector are provided at the lower part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable cutting machine, and more particularly, to a portable cutting machine capable of adjusting a cutting depth.

  Conventionally, there is a portable cutting machine in which a cutting machine for cutting and processing a processing member such as wood can be carried. This portable cutting machine has excellent portability and is frequently used not only in factories but also in construction sites.

  When cutting wood with a portable cutting machine, draw a marking line indicating the planned cutting location on the wood and align the suggestion provided in front of the circular saw blade of the portable cutting machine on the marking line. And positioning is performed. At the time of the cutting operation, there is a problem that chips are generated by cutting the wood, and the chips accumulate on the suggestion portion.

  The portable cutting machine described in Patent Document 1 is provided with a blower mechanism that blows wind toward the suggestion section. The blower mechanism is composed of a fan provided in the casing and a guide member provided separately outside the saw cover, and the wind generated by the fan is blown to the suggestion portion via the guide member.

There is also a portable cutting machine in which a light that illuminates the vicinity of a processed member is provided on a saw cover. In such a portable cutting machine, since it is necessary to route the wiring extending from the light to the power supply unit, it is necessary to separately provide a wiring guide member serving as a wiring path.
Japanese Patent No. 3765425

  However, when the blower mechanism and the light are provided, a wind guide member and a wiring guide member are required, which increases the number of parts and the number of work steps for assembling them. Then, an object of this invention is to provide the portable cutting machine which suppressed the increase in the number of parts and simplified the assembly operation.

  In order to achieve the above object, the present invention includes a housing, a motor built in the housing, a cutting blade driven by the motor to cut a workpiece, and an outer periphery of the cutting blade provided in the housing. A saw cover that covers approximately half of the base plate, a base that supports the saw cover and abuts against the processing member, has a suggestion portion at one end, a fan provided in the housing, and a detachable mounting on the saw cover The light emitting unit, and the light emitting unit includes a casing and a light source that is held by the casing and can irradiate the vicinity of the cutting blade. The casing includes an opening and the fan. There is provided a portable cutting machine having an air path for guiding the generated air flow to the opening, and blowing the air flow from the opening to the vicinity of the suggestion.

  The portable cutting machine having the above configuration further includes a power source for supplying power to the light source, the light emitting unit includes a relay unit provided between the light source and the power source, and the relay unit includes: It is preferable to be configured to be connected to the light source and detachable from the power source.

  In addition, it is preferable that the relay unit and the power source are configured to be electrically connectable in a state where the light emitting unit is attached to the saw cover.

  The portable cutting machine further includes a power connector exposed from the housing, and a power line having a portion exposed from the housing and connecting the power source and the power connector, and the relay means includes the casing A connector that is exposed from the power connector and connected to the power connector, and a wire that has a portion that is exposed from the casing and that connects the light source and the connector for connection, and a portion of the wire that is exposed from the casing Is preferably shorter than the portion of the power supply line exposed from the housing.

  Further, it is preferable that a light source holding part for holding the light source and a relay means holding part for holding the relay means are provided inside the casing and outside the air path.

  Moreover, it is preferable that this light emission part has a some light source, and illuminates the cutting blade vicinity from the both sides of this cutting blade.

  According to the portable cutting blade of claim 1, the casing has an opening that opens toward the suggesting portion and an air passage that guides the air flow generated by the fan to the opening. When the wind generated by the air blows out from the opening portion to the suggestion portion through the air passage, chips and the like accumulated in the suggestion portion can be blown off. Furthermore, since the casing also has a function of holding the light source, it is not necessary to provide a separate member for holding the light source, and the number of parts can be reduced.

  According to the portable cutting machine of the second aspect, since the relay unit is connected to the light source and detachable from the power source, the light emitting unit can be attached to and detached from the housing and the saw cover as an independent unit. Composed. Therefore, it is not necessary to connect the light source and the power source in advance before mounting the light emitting unit on the saw cover.After the light emitting unit is assembled as an independent unit, the light emitting unit is mounted on the saw cover and the relay means is used as the power source. It only has to be attached, and the assembly work becomes easy.

  According to the portable cutting machine of claim 3, since the relay means and the power source can be electrically connected in a state where the light emitting unit is mounted on the saw cover, in addition to the mounting process of the light emitting unit, separately The electrical connection process between the relay means and the power source is not required, and the assembly process can be simplified.

  According to the portable cutting machine according to claim 4, the portion exposed from the casing of the electric wire connecting the light source and the connector is more than the portion exposed from the housing of the power wire connecting the power source and the power connector. Since it is short, the connector and the power supply side connector are connected on the light emitting unit side. Therefore, electrical connection after the light emitting unit is mounted on the saw cover is facilitated. Also, when working with the light emitting unit removed from the housing and the saw cover as a light source maintenance work, the portion of the electric wire exposed from the casing is configured to be short, so the electric wire does not interfere with the work. , Work efficiency is improved.

  According to the portable cutting machine of claim 5, since the light source holding part and the relay means holding part are provided outside the air path, the wind from the fan does not contact the light source and the relay means. . Therefore, dust in the outside air does not adhere to the light source and the relay means. Further, the light source and the relay means do not become air path resistance.

  According to the portable cutting machine of the sixth aspect, since the vicinity of the cutting blade is illuminated from both sides of the cutting blade by the plurality of light sources, it is possible to suppress the occurrence of the shadow of the cutting blade.

  A portable cutting machine according to an embodiment of the present invention will be described with reference to FIGS. A circular saw 1 that is a portable cutting machine shown in FIGS. 1 to 3 is mainly composed of a housing 2, a circular saw blade 3, a saw cover 4, a base 6, and a light emitting portion 8. .

  The housing 2 mainly includes a motor housing portion 21 in which the motor 2A is housed, a handle portion 22 integral with the motor housing portion 21, and a fan housing portion 23 in which the fan 2B is housed. In the saw cover 4, a drive system (not shown) driven by the motor 2A is provided, and the circular saw blade 3 can be rotated by this drive system. The fan 2B is provided coaxially with the motor 2A and rotates integrally with the motor 2A. Therefore, when the motor 2A is supplied with power from the power supply unit 22D (FIG. 4) provided outside the housing 2, the fan rotates integrally with the motor 2A, and further, the circular saw is connected via the drive system. The blade 3 rotates.

  As shown in FIG. 3, the handle 22 has a switch 22A for controlling the driving of the motor 2A, a stopper (not shown) for holding the switch in an ON state, and an LED 82 of the light-emitting unit 8 to be turned on / off. A light switch 22B for switching is provided. As shown in FIG. 4, when an operation of pulling the switch 22A is performed, the power supply unit 22D and the motor 2A are connected via the switch 22A, and power is supplied from the power supply unit 22D to the motor 2A. When the light switch 22B is pressed, power is supplied from the power supply unit 22D to the LED 82 of the light emitting unit 8. In addition, a power supply side connector 22F is provided at the tip of two power supply lines 22E extending from the power supply unit 22D and the light switch 22B.

  As shown in FIG. 1, a gear housing 24 that is connected to the saw cover 4 and accommodates the drive system is provided at a position on the side opposite to the motor accommodating portion 21 of the handle portion 22 in the housing 2.

  As shown in FIG. 2, the saw cover 4 includes a saw cover main body 41 connected to the gear housing 24 (FIG. 1) of the housing 2, a safety cover 42 provided on the saw cover main body 41, and a saw cover main body 41. It is mainly comprised from the link cover 43 provided so that attachment or detachment was possible, and the circular saw blade 3 is covered.

  The saw cover main body 41 is made of metal and covers substantially half of the circular saw blade 3 as shown in FIG. On one end side in the circumferential direction of the saw cover main body 41, a connecting portion 41A connected to a rotation support portion 62 described later is defined. In the saw cover main body 41, ribs 41 </ b> B (FIG. 1) are provided at positions that intersect with the same plane as the side surface of the circular saw blade 3. The other end side in the circumferential direction of the saw cover main body 41 has a through hole 41a formed on an extension line of the rib 41B, and a link 65 described later is attached to the through hole 41a portion with respect to the saw cover main body 41. A fastening portion 5 that can be fastened and released is arranged.

  As shown in FIG. 2, the fastening portion 5 mainly includes a bolt 51, a washer 52, a rotation operation portion 53, and a nut 54. The bolt 51 is positioned between the shaft portion 51A, the flange portion 51B provided on the base end side of the shaft portion 51A, and the shaft portion 51A and the flange portion 51B, and the cross section orthogonal to the axial direction of the shaft portion 51A is approximately. A square portion 51C. A through hole is formed at a substantially central position of the washer 52. By attaching the washer 52 to the saw cover main body 41, the washer 52 is held by the saw cover main body 41 so as not to rotate around the axis of the through hole, and the shaft 51A of the bolt 51 is inserted into the through hole. The washer 52 includes a first washer 52A and a second washer 52B. The rotation operation unit 53 is fitted to the first washer 52A and can be rotated integrally. The first washer 52A is a second washer. The shaft 51A of the bolt 51 is inserted into the through hole.

  As shown in FIG. 2, a safety cover 42 covering at least a part of the circular saw blade 3 is provided so as to be rotatable in the circumferential direction along the outer edge of the saw cover main body 41. A spring (not shown) is interposed between the saw cover body 41 and the safety cover 42, and urges the safety cover 42 counterclockwise with respect to the saw cover body 41 in the drawing. Therefore, when the cutting operation is not performed, the safety cover 42 covers a portion of the circular saw blade 3 that cannot be covered by the saw cover main body 41 from the other end side toward the one end side. The circular saw blade 3 is exposed between one end side of the saw cover main body 41 and the safety cover 42, and this exposed portion serves as a portion for cutting the processing member, and the other end of the saw cover main body 41 is exposed. From the side toward the one end, the circular saw 1 advances. Therefore, one end side from the other end side of the saw cover body 41 is defined as the cutting direction, one end side of the saw cover body 41 is defined as the cutting direction front side, and the other end side is defined as the cutting direction rear side. The link cover 43 is detachably provided on the upper surface of the saw cover main body 41 on the rear side in the cutting direction, and covers the link 65.

  As shown in FIGS. 1 and 2, in the base member 61, a rotation support portion 62 and a suggestion portion 67 indicating a cutting position are provided at the front side in the cutting direction of the opening 6 a, and The blade 3 and the saw cover 4 are supported so as to be rotatable and tiltable. The base member 61 is a main component of the base 6 and is made of a metal and is formed of a substantially rectangular plate. The base member 61 is disposed so that the longitudinal direction thereof coincides with the cutting direction, and a long hole-like opening 6a extending in the longitudinal direction is formed on the surface thereof. The base member 61 is configured so that the circular saw blade 3 and the safety cover 42 enter the opening 6a. The rotation support portion 62 includes a pair of arm portions extending rearward in the cutting direction, and the arm portion is provided with a rotation shaft portion 62A whose axial direction is a direction orthogonal to the cutting direction. A connecting portion 41A located on the front side in the cutting direction of the saw cover main body 41 is pivotally supported on the rotating shaft portion 62A. The link 65 is inserted along the inner wall of the saw cover main body 41. The link 65 can rotate the saw cover main body 41 around the rotation shaft portion 62A by guiding the fastening portion 5 to be slidable. The suggesting portion 67 is provided at a position where the plane including the circular saw blade 3 intersects, which is the cutting-edge position in the cutting direction of the base member 61.

  As shown in FIG. 1, the light-emitting portion 8 is provided so as to extend from the inside of the housing 2 to the front side in the cutting direction of the saw cover 4, a casing 81, an LED 82 that illuminates the vicinity of the cut portion of the processed member, and a power supply for the LED 82. 8 is mainly composed of a board 83 (FIG. 8) for controlling the power supply, an electric wire 84 (FIG. 8) extending from the board 83, and a connector 85 (FIG. 8) provided at the tip of the electric wire 84.

  As shown in FIGS. 1 and 2, the casing 81 is provided from the inside of the housing 2 on the front side in the cutting direction of the saw cover main body 41, and is fixed to the both side surfaces of the saw cover main body 41 with screws 90 one by one. . As shown in FIG. 1, the casing 81 includes an air passage 81 a that extends from the fan housing portion 23 provided in the housing 2 to the front of the saw cover main body 41, and a connection passage that is disposed outside and below the air passage 81 a. 81b (FIG. 5). The casing 81 has a straight portion 81A provided so as to extend from the fan accommodating portion 23 along the inner wall of the gear housing 24, and a tip provided so as to cover the portion in front of the cutting direction of the saw cover main body portion 41 in communication with the straight portion 81A. It is mainly composed of the part 81B.

  As shown in FIGS. 6 and 7, the straight portion 81A includes a first air path 81c communicated with the fan 2B, and a first connection path 81d disposed below the first air path 81c. ing. The first connection path 81d guides the electric wire 84 and the connector 85 to the power supply side connector 22F held by the housing 2.

  As shown in FIG. 7A, an upper portion of the tip 81B has an opening 81e that opens toward the suggesting portion 67 (FIG. 2), and the fan accommodating portion 23 via the first air passage 81c. A second air passage 81f to be connected is provided. In the lower part, there is a light holding part 81g for holding the LED 82, a board holding part 81h for holding and holding the board 83, and a second connection path 81i (FIG. 7 (FIG. 7)) that communicates the board holding part 81h and the first connection path 81c. b)).

  As shown in FIG. 6, the LED 82 can illuminate the cut portion from both sides of the circular saw blade 3 by the two first LEDs 82A located on the motor 2A side and the second LED 82B located on the non-motor 2A side. . Therefore, it can suppress that the shadow of the circular saw blade 3 generate | occur | produces. As shown in FIG. 8, the first LED 82A is directly connected to the substrate 83, and the second LED 82B is connected to the substrate 83 via the wiring 82C. The first LED 82A is held in a state in which the tip protrudes to the outside from a through hole 81j formed in the first light holding portion 81g located below the substrate holding portion 81h. The second light holding part 81k is arranged on the side opposite to the first light holding part 81g of the saw cover main body part 4. Similarly to the first LED 82A, the second LED 82B is held in a state in which the tip projects from the through hole 81m provided in the second light holding portion 81k to the outside. Further, as shown in FIG. 2, the second LED 82B is held by the second light holding portion 81k of the casing 81 (see FIG. 9A), and the saw cover main body 41 side is placed on the light cover 86 (FIG. 9). (B)). Further, a portion of the casing 81 on the side of the saw cover main body 41 (the side on which the first air passage 81c and the first light holding portion 81g are provided) is covered by engagement of a cover (not shown). Yes. Specifically, the first LED 82A is held by the first light holding portion 81g, and the substrate 83 is covered by a cover (not shown) while being held in the substrate holding portion 81h.

  With the above configuration, as shown in FIG. 5, the electric wires 84 extending from the board 83 are routed to the first connection path 81d via the second connection path 81i, and as shown in FIG. To the outside of the casing 81.

  On the other hand, as shown in FIG. 4, the power supply side connector 22F is connected to the power supply unit 22D through the light switch 22B in the handle unit 22. At this time, as shown in FIG. 3, the power supply line 22E is routed in front of the fan accommodating portion 23, and the power supply side connector 22F is positioned near the end of the casing 81 and the opening of the connection path 81b. When the connector 85 and the power supply side connector 22F are connected and the light switch 22B is pressed, each LED 82 is connected to the power supply unit 22D (FIG. 4) and lights up.

  According to the above configuration, as shown in FIG. 1, the casing 81 of the light emitting unit 8 includes the opening 81 e (FIG. 2) that opens toward the suggestion 67, the fan 2 </ b> B, and the opening 81 e (FIG. 2). Since the wind generated by the rotation of the fan 2B blows out from the opening 81e (FIG. 2) to the suggestion 67 through the airflow 81a, the air is accumulated in the suggestion 67. The blown chips etc. can be blown away. Furthermore, as shown in FIG. 5, the casing 81 has a function of holding the LED 82, the board 83, the electric wire 84, and the connector 85 (FIG. 6), so there is no need to provide a separate holding member, and the number of parts can be reduced. Can be reduced. Further, as shown in FIG. 3, the connector 85 is connected to the LED 82 via the electric wire 84, and is attachable to and detachable from the power source portion 22D (FIG. 4) via the power source side connector 22F of the handle portion 22. Therefore, when the LED 82 and the power supply unit 22D (FIG. 4) are detached, specifically, when the connector 85 and the power supply side connector 22F are detached, the light emitting unit 8 is a housing as an independent unit. 2 and the saw cover main body 41 are configured to be detachable. Therefore, it is not necessary to connect the connector 85 and the power supply side connector 22F in advance and connect the power supply unit 22D (FIG. 4) and the LED 82 before attaching the light emitting unit 8 to the saw cover main body 41. After assembling 8 as an independent unit, the light emitting part 8 is attached to the saw cover body 41 and the connector 85 is attached to the power supply side connector 22F, and the assembling work is facilitated.

  Moreover, since the electric wire 84 which connects LED82 and the connector 85 is shorter than the power wire 22E which connects the power supply 22D and the power supply side connector 22F, the connector 85 and the power supply side connector 22F are connected by the light emission part 8 side. . Therefore, electrical connection after the light emitting unit 8 is mounted on the saw cover main body 41 is facilitated. Further, when the LED 82 is subjected to maintenance work or the like when the light emitting unit 8 is removed from the housing 2 and the saw cover main body 41 as a unit, the portion of the electric wire 84 exposed from the casing 81 is configured to be short. Work efficiency is improved without interfering with work.

  Further, as shown in FIG. 5, since the light holding portion 81g and the wiring path 81b are provided outside the air path 81a, the wind from the fan 2B contacts the LED 82, the board 83, the electric wire 84, and the connector 85. There is nothing to do. Therefore, dust or the like in the outside air is not attached to the LED 82, the board 83, the electric wire 84, and the connector 85. Moreover, LED82, the board | substrate 83, the electric wire 84, and the connector 85 do not become wind path resistance.

  The portable cutting machine by this invention is not limited to embodiment mentioned above, A various deformation | transformation and improvement are possible within the range of the summary of the invention described in the claim. For example, as shown in FIG. 10, the electric wire 84 and the connector 85 may be fixed in the connection path 81 d and there may be no portion exposed from the casing 81. Similarly, the power supply line 22E and the power supply side connector 22F may be configured such that the power supply line 22E and the connector 22F are fixed in the housing 2, as shown in FIG. According to such a configuration, in a state where the light emitting unit 8 is mounted on the housing 2 and the saw cover main body 41, that is, at the same time as the light emitting unit 8 is mounted on the housing 2 and the saw cover main body 41, the connector 85 and the power source are connected. Since it can be connected to the side connector 22F, a separate electrical connection process between the connector 85 and the power supply side connector 22F is not required in addition to the mounting process of the light emitting unit 8, and the assembly process can be simplified. it can.

  In the embodiment described above, the casing 81 of the light emitting unit 8 is configured to include the first light holding unit 81g and the second light holding unit 81k, but the first light holding unit and the second light holding unit May be members independent of each other.

  In the above-described embodiment, the casing 81 of the light emitting unit 8 is configured such that the second light holding unit 81k is provided with the light cover 86 that covers the side of the saw cover body 41 of the second LED 82B. The main body 41 side may be configured to be covered by the second light holding unit.

  Further, in the above-described embodiment, the rotation operation unit 53 and the first washer 52A are formed as separate members and can be rotated integrally by being fitted to each other. The first washer 52A may be integrally formed.

  The power supply unit may be a rechargeable battery. Further, the power supply unit may indicate a location that can be connected to an AC power supply.

It is a top view which shows the portable cutting machine which concerns on embodiment of this invention. It is a side view by the side of the non-motor which shows the portable cutting machine which concerns on embodiment of this invention. It is sectional drawing of the III-III cross section vicinity in FIG. It is explanatory drawing which shows the electrical connection of the portable cutting machine which concerns on embodiment of this invention. It is a top view which shows a part of light emission part of the portable cutting machine which concerns on embodiment of this invention. It is a front view which shows the light emission part of the portable cutting machine which concerns on embodiment of this invention. It is (a) perspective view and (b) perspective view which show a part of casing of the portable cutting machine which concerns on embodiment of this invention. It is a top view which shows a light source and a relay means among the light emission parts of the portable cutting machine which concerns on embodiment of this invention. (A) The top view which shows a part of light source holding part of the portable cutting machine which concerns on embodiment of this invention, (b) It is a perspective view of the light cover provided in a light source holding part. It is a front view which shows the light emission part of the portable cutting machine which is an example of the modification of this invention. It is a front view which shows the housing and power connector of the portable cutting machine which are an example of the modification of this invention.

Explanation of symbols

1 ・ ・ Circular saw 2 ・ ・ Housing 2A ・ ・ Motor 2B ・ ・ Fan 3 ・ ・ Circular saw blade
4 .... Saw cover 5 .... Fastening part 6 .... Base 6a ... Open part 8 .... Light emitting part
21..Motor housing part 22..Handle part 22A..Switch
22B ... Light switch 22D ... Power supply 22E ... Power line
22F ・ ・ Power supply side connector 23 ・ ・ Fan housing part 24 ・ ・ Connecting part
41..Saw cover body 41A..Connecting part 41a..Through hole 41B..Rib
42 ・ ・ Safety cover 43 ・ ・ Link cover 51 ・ ・ Bolt 51A ・ ・ Shaft
51B ··· Saddle 51C · · Square part 52 · · Washer 53 · · Rotary operation part
54..Nut 61..Base member 62..Rotation support 62A..Rotation shaft
65 ··· Link 67 ··· Suggestion portion 81 · · Casing 81a · · Airway
81A ... Straight line part 81b Connection path 81B Tip part 81c First air path
81d ··· First connection path 81e · · Discharge port 81f · · Second air passage
81g ... 1st light holding part 81h ... Board holding part 81i ... Second connection path
81j ·· Through hole 81k ·· Second light holding part 81m ·· Through hole 82 ·· LED
82C ... Wiring 83 ... Board 84 ... Electric wire 85 ... Connector 86 ... Light cover 90 ... Screw

Claims (6)

A housing;
A motor built in the housing;
A cutting blade that is driven by the motor to cut the workpiece;
A saw cover provided on the housing and covering substantially half of the outer periphery of the cutting blade;
A base that supports the saw cover and abuts against the processing member, and is provided with a suggestion portion at one end;
A fan provided in the housing;
A light emitting portion detachably provided on the saw cover,
The light emitting unit includes a casing and a light source that is held by the casing and can irradiate the vicinity of the cutting blade,
The casing has an opening and an air passage that guides the airflow generated by the fan to the opening, and the airflow is blown out from the opening to the vicinity of the suggestion. Portable cutting machine. And a power supply for supplying power to the light source,
The light emitting unit has relay means provided between the light source and the power source,
The portable cutting machine according to claim 1, wherein the relay means is connected to the light source and is detachable from the power source.   3. The portable cutting machine according to claim 2, wherein the relay means and the power source are electrically connectable in a state where the light emitting unit is mounted on the saw cover. And a power connector exposed from the housing, and a power line having a portion exposed from the housing and connecting the power source and the power connector,
The relay means comprises a connection connector exposed from the casing and connected to the power connector, and a wire having a portion exposed from the casing and connecting the light source and the connection connector.
The portable cutting machine according to claim 2 or 3, wherein a portion of the electric wire exposed from the casing is shorter than a portion of the power line exposed from the housing.   5. A light source holding part for holding the light source and a relay means holding part for holding the relay means are provided inside the casing and outside the air path. The portable cutting machine of any one of these.   6. The portable cutting machine according to claim 1, wherein the light emitting unit has a plurality of light sources and illuminates the vicinity of the cutting blade from both sides of the cutting blade.

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