Circular saw

Abstract

To provide a circular saw allowing a dust collection state in a dust collection box to be easily determined.SOLUTION: A circular saw 1 comprises a dust collection box 11 configured to allow chips produced in a cutting process to be collected. The dust collection box 11 is a resin molded body with light transmissivity. The circular 1 has a lighting member 31 for the dust collection box. The lighting member 31 for the dust collection box radiates light from a left side of the dust collection box 11 toward the dust collection box 11. The lighting member 31 for the dust collection box is located at a position lower than the lower ends of an inflow part 14C and a discharge part 15C of the dust collection box 11. The lighting member 31 for the dust collection box is located within a range where a chip receiving part 16 exists in a front-to-rear direction.SELECTED DRAWING: Figure 8

Description

Technical Field

[0004] ,

[0006] , , A gear case housing the aforementioned transmission mechanism, , , , A transmission mechanism for transmitting the rotational force of the motor to the circular saw blade, , , , ,

[0005] , Rotation around the left-right axis , , Located below the aforementioned motor, , , , , , , , ,

[0001] The present invention relates to a circular saw having a dust collection box.

Background Art

[0002] The following Patent Document 1 discloses a circular saw provided with a dust collection box.

Prior Art Document

Patent Document

[0003] <00000s7>

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a circular saw provided with a dust collection box, for example, in a dark place, it is difficult to know the amount of accumulated dust. Further, when the dust collection box becomes full due to continuous work, there is a possibility that dust will flow back from the inlet portion of the dust collection box.

[0005] An object of the present invention is to provide a circular saw that can easily recognize the dust collection state of the dust collection box.

Means for Solving the Problems

[0006] [[ID=~]]The present invention provides a circular saw, comprising: a motor; a housing for housing the motor; Located below the aforementioned motor, a base connected to the housing; a circular saw blade driven by the motor; Rotation around the left-right axis a saw cover covering at least a part of the circular saw blade; a dust collection box connected to the saw cover and configured to be able to collect chips generated by cutting work; Note: There seems to be a typo in the original text where ` ` and ` ` are misspelled as `<s>0000007< / s>` and `<00000s7>` respectively. I have corrected them in the translation as ` ` and ` ` for the sake of accuracy. Also, the text `

[0006] ` and ` A transmission mechanism for transmitting the rotational force of the motor to the circular saw blade, ` etc. seem to be incomplete or have some issue as they are just tags without much context, but I have translated them as is according to the rules. If there is more context available for these, it might be possible to provide a more meaningful translation.​​​​​ A light-transmitting wall that is part of the dust collection box and allows light to pass from the outside to the inside of the dust collection box, and a lighting member that irradiates light from the outside of the dust collection box toward the light-transmitting wall. death, The dust collection box has an upper part that is located above the gear case and to one side in the left-right direction above the lighting member. The upper part has a left side portion facing to the left and a right side portion facing to the right. The left and right side portions are translucent. The lighting member is capable of illuminating the inside of the dust collection box through the light-transmitting wall by irradiating light toward one side in the left-right direction, and the irradiation range is such that it passes through the inside of the upper part. The worker can see the interior of the upper part from either the left side or the right side. 。

[0007] The present invention may be expressed as "working machine", "power tool", "electrical equipment", etc., and what is expressed in this way is also effective as an aspect of the present invention.

Effects of the Invention

[0008] According to the present invention, it is possible to provide a circular saw that makes it easy to recognize the dust collection state of the dust collection box.

Brief Description of the Drawings

[0009] [Figure 1] Right side view of the circular saw 1 according to an embodiment of the present invention. [Figure 2] Right side view of the circular saw 1 with the dust collection box 11 removed. [Figure 3] Plan view of the circular saw 1. [Figure 4] Front view of the circular saw 1. [Figure 5] Cross-sectional view taken along line A-A of FIG. 3. [Figure 6] Cross-sectional view taken along line B-B of FIG. 1. [Figure 7] (A) is a cross-sectional view taken along line C-C of FIG. 1. (B) is a cross-sectional view taken along line D-D of FIG. 1. [Figure 8] Partial enlarged view of FIG. 7(B), showing the irradiation range of the light emitted by the lighting member 31 for the dust collection box. [Figure 9] Perspective view of the assembled state of the gear case 7, saw cover 8, dust collection box 11, dust cover 17, and holding member 20 of the circular saw 1. [Figure 10]Exploded perspective view of the unit shown in FIG. 9. [Figure 11] Right side view of the circular saw 1A according to another embodiment of the present invention.

Mode for Carrying Out the Invention

[0010] In the following, the same or equivalent components, members, etc. shown in each drawing are denoted by the same reference numerals, and redundant explanations are omitted as appropriate. The embodiments are illustrative and not restrictive of the invention. All features and combinations thereof described in the embodiments are not necessarily essential to the invention.

[0011] [[ID=Y14]] FIGS. 1 to 10 relate to the circular saw 1 according to an embodiment of the present invention. The front-back, up-down, and left-right directions orthogonal to each other in the circular saw 1 are defined by FIGS. 1, 3, and 4. The left-right direction is perpendicular to the side surface of the circular saw blade 10. The front-back direction is parallel to the bottom surface of the base 2 and the side surface of the circular saw blade 10. The left-right direction is defined based on the operator viewing from the front.

[0012] The circular saw 1 has a base 2. The base 2 is a substantially rectangular plate made of metal such as aluminum, for example. The longitudinal direction of the base 2 is parallel to the cutting direction (front-back direction). The bottom surface of the base 2 serves as a sliding surface with the workpiece. The cutting progress direction is forward. That is, the circular saw 1 operates toward the front.

[0013] The circular saw 1 has a motor housing 3. The motor housing 3 is, for example, a resin molded body having a front-back two-part structure fixed and integrated with each other by screwing or the like. The motor housing 3 is connected and fixed to the gear case 7 by screwing or the like and is located to the left of the gear case 7. The motor housing 3 houses the motor 45 and the like as shown in FIG. 5.

[0014] The circular saw 1 has a handle housing 4. The handle housing 4 is made of two resin molded bodies, for example, a left and right split structure, which are fixed together and integrated by screws or the like. The handle housing 4 is connected and fixed to the gear case 7 by screws or the like, and is located to the left of the gear case 7. The grip portion of the handle housing 4 extends in the front-rear direction above the motor housing 3.

[0015] A battery pack 5 is detachably mounted on the lower rear end of the handle housing 4. The circular saw 1 operates on power from the battery pack 5.

[0016] As shown in Figure 2, the circular saw 1 has a trigger switch 6 on the grip portion of the handle housing 4. The trigger switch 6 is a switch that the operator uses to start and stop the motor 45.

[0017] The circular saw 1 has a gear case 7. The gear case 7 is made of metal such as aluminum and houses the transmission mechanism 49 described later. The gear case 7 is integrated with the motor housing 3 and the handle housing 4 and constitutes the main body housing of the circular saw 1.

[0018] The gear case 7 is connected to the base 2 via a pivot support mechanism 41 and a tilt support mechanism 42. The gear case 7 is supported by the pivot support mechanism 41 so as to be able to swing vertically relative to the base 2. The cutting depth can be adjusted by swinging the gear case 7. The gear case 7 is supported by the tilt support mechanism 42 so as to be able to tilt to at least one side in the left-right direction relative to the base 2. Inclined cutting is possible by tilting the gear case 7.

[0019] The gear case 7 has an opening 7a. The opening 7a is a through hole that penetrates the upper wall portion of the gear case 7, which is perpendicular to the left-right direction, in the left-right direction. The opening 7a is located above the portion of the gear case 7 that houses the transmission mechanism 49. As shown in Figure 8, the opening 7a is located above the upper end of the circular saw blade 10. The opening 7a is located below the lower ends of the inlet 14 and outlet 15 of the dust collection box 11, which will be described later.

[0020] The circular saw 1 has a saw cover 8. The saw cover 8 is also called an inner cover. The saw cover 8 is a translucent material, such as a resin molded body. The saw cover 8 is made of, for example, colorless and transparent polycarbonate. The saw cover 8 is connected and fixed to the gear case 7 by screws or the like, and is located to the right of the gear case 7. The saw cover 8 covers at least a part of the circular saw blade 10, for example, the upper half. The saw cover 8 has a discharge section 8A (discharge hole) for discharging chips (processed pieces) generated by processing to the outside of the saw cover 8, and a ventilation section 8B (ventilation hole) for allowing air from the outside to flow into the inside of the saw cover 8. The discharge section 8A is a hole formed through the saw cover 8. The ventilation section 8B is also a hole formed through the saw cover 8.

[0021] The circular saw 1 has a protective cover 9. The protective cover 9 is, for example, a resin molded body. The protective cover 9 is rotatably mounted on the gear case 7 and covers at least a portion of the circular saw blade 10, for example, the lower part, in an openable and closable manner. The protective cover 9 is biased by a biasing means (not shown) in the counterclockwise direction in Figure 1 toward a position that covers the lower part of the circular saw blade 10, as shown in Figure 1.

[0022] The circular saw 1 has a circular saw blade 10. The circular saw blade 10 is driven by a motor 45 via a transmission mechanism 49, as shown in Figure 5. The circular saw blade 10 is configured to rotate about an axis A2 that extends in the left-right direction.

[0023] As shown in Figure 5, the circular saw 1 has a motor 45, a fan 47, and an inverter board 48 inside the motor housing 3. The motor 45 is, in this example, an inner rotor type brushless motor.

[0024] The fan 47 is directly connected to the motor shaft 46 to the right of the motor body 45 (the part of the motor 45 excluding the motor shaft 46) and rotates together with the motor 45. The fan 47 is an axial flow fan that generates airflow to the right. The motor shaft 46 is configured to rotate about an axis A1 that extends in the left-right direction.

[0025] The inverter board 48 is equipped with switching elements for driving the motor 45. The inverter board 48 is held to the left of the motor 45 body in a position perpendicular to the left-right direction.

[0026] The circular saw 1 has a transmission mechanism 49 inside the gear case 7. The transmission mechanism 49 is a reduction mechanism that reduces the rotation of the motor 45 and transmits it to the circular saw blade 10.

[0027] The circular saw 1 has a dust collection box 11. The dust collection box 11 is also called a dust box. The dust collection box 11 has a two-part structure, for example, left and right, and specifically, the left dust collection box 12 and the right dust collection box 13 are fixed to each other and integrated by screws or the like.

[0028] The left dust collection box 12 and the right dust collection box 13 are made of a translucent material, such as a resin molded body, for example, colored transparent polycarbonate. The left dust collection box 12 and the right dust collection box 13 may also be colorless and transparent.

[0029] At least a portion of the dust collection box 11, including the part of its left side facing the opening 7a of the gear case 7 (the part facing the lighting member 31 for the dust collection box through the opening 7a), is a translucent wall that allows light to pass from the outside to the inside. At least a portion of the right side of the dust collection box 11 (the side opposite to where the lighting member 31 for the dust collection box is located) is a visibility wall that allows the inside to be seen from the outside.

[0030] The dust collection box 11 is detachably connected (attached) to the saw cover 8 and is located above the saw cover 8. The dust collection box 11 is secured to the saw cover 8 by a latch 18, as shown in Figure 1. By rotating the latch 18 clockwise in Figure 1, the lock is released and the dust collection box 11 can be removed from the saw cover 8.

[0031] The dust collection box 11 is configured to collect chips (dust) generated by the cutting process. As shown in Figures 6 to 8, the dust collection box 11 has an inlet 14, an outlet 15, and a chip storage section 16.

[0032] The chip storage section 16 is a space (dust collection chamber) for storing collected chips, and is a space that extends in the front-to-back and up-and-down directions (especially in the front-to-back direction). The inlet section 14 has an inlet inlet 14A, an inlet passage 14B, and an inlet outlet 14C. The discharge section 15 has a discharge outlet 15A, a discharge passage 15B, and an inlet inlet 15C. The inlet section 14 and the discharge section 15 are located in the front upper part of the chip storage section 16. The inlet inlet 14A is a portion that opens downwards facing the discharge section 8A. The inlet outlet 14C is a portion that opens rearward facing the chip storage section 16. The inlet passage 14B is a passage (space) that connects the inlet inlet 14A and the inlet outlet 14C. The discharge outlet 15A is a portion that opens downwards facing the ventilation section 8B. The discharge inlet 15C is a portion that opens to the rear, facing the chip storage section 16. The discharge passage 15B is a passage (space) connecting the discharge outlet 15A and the discharge inlet 15C. The chips are configured to move to the chip storage section 16 by passing through the inlet 14A, the inlet passage 14B, and the inlet outlet 14C in that order. The air inside the chip storage section 16 is configured to move to the ventilation section 8B by passing through the discharge inlet 15C, the discharge passage 15B, and the discharge outlet 15A in that order. As described above, the inlet 14 is a portion that serves as a passage for sending chips sent from the discharge section 8A to the chip storage section 16. The discharge 15 is a portion that serves as a passage for sending air inside the chip storage section 16 to the ventilation section 8B. The chip storage section 16 is a portion that extends rearward and downward from the inlet outlet 14C (and discharge inlet 15C). The inlet 14 and outlet 15 are arranged in the left-right direction, with the inlet 14 located to the right of the outlet 15.

[0033] The chips generated by the cutting process using the rotating circular saw blade 10 are blown upward along with the air by the momentum of the rotation of the circular saw blade 10 and collected in the chip collection section 16. Figure 1 shows a simplified diagram of the airflow inside the dust collection box 11 using a dashed line. The chips enter the chip collection section 16 along with the air. The air is exhausted outside the dust collection box 11 by passing through the discharge section 15 and exiting the chip collection section 16, but the chips remain inside the chip collection section 16 because they have a higher specific gravity than air.

[0034] A dust cover 17 is provided at the rear end opening of the dust collection box 11 so as to be openable and closable. The dust cover 17 is locked in the closed position by a hook portion 17a. By pushing up the hook portion 17a, the lock is released, and the dust cover 17 can be rotated upward to open. In this state, metal chips in the metal chip collection section 16 can be discharged from the rear end opening of the dust collection box 11. The rear end of the dust cover 17 is a hose attachment port to which a hose of a dust collector (not shown) can be connected, and is closed so as to be openable and closable by a cap 19 made of rubber or the like.

[0035] As shown in Figures 1, 7(B), 8, and 10, the circular saw 1 has a lighting member 31 for the dust collection box, which serves as a lighting element. The lighting member 31 for the dust collection box is, for example, a chip LED, and it emits light from the left side of the dust collection box 11 toward the lower part (transparent wall) of the left side of the dust collection box 11 (the left side of the chip collection section 16).

[0036] As shown in Figure 8, the lighting member 31 for the dust collection box is held in a position with its light-emitting surface facing diagonally upwards to the right, and faces the opening 7a of the gear case 7 from the left. The lighting member 31 for the dust collection box is located to the left of the saw cover 8. The lighting member 31 for the dust collection box is located below the lower end positions of the inlet 14 and outlet 15 (vertical position shown as H1 in Figure 8). In the front-rear direction, the lighting member 31 for the dust collection box is located within the range of the chip storage section 16, preferably towards the front (near the front end) of the range.

[0037] The light emitted by the lighting component 31 for the dust collection box passes through the opening 7a, the top of the saw cover 8, and the lower part of the left side of the dust collection box 11 (the light-transmitting wall), enters the dust collection box 11 (inside the chip storage section 16), and exits the dust collection box 11 through the right side (the visibility wall). As shown in Figure 8, Lighting component 31 for dust collection box The irradiation range of the light emitted by the device (hereinafter referred to as "irradiation range") is shown in a simplified manner.

[0038] The illumination range is approximately 120 degrees around the optical axis of the dust collection box lighting element 31. However, due to its positional relationship with the opening 7a of the gear case 7, approximately 30 degrees of the illumination range, as seen in the cross-section of Figure 8, is blocked by a part of the gear case 7 (the upper part of the opening 7a). As a result, light coming from a direction close to directly upward (such as the light rays indicated by the dashed arrow in Figure 8) is cut off, preventing the light emitted from the dust collection box lighting element 31 from directly reaching the eyes of an operator looking at the dust collection box 11 from above, thereby reducing glare.

[0039] The irradiation range covers the lower end of the chip collection section 16 when viewed in the cross-section shown in Figure 8. Therefore, it is easy to see the beginning of chip accumulation in the chip collection section 16.

[0040] Since the lighting component 31 for the dust collection box is located below the lower end position (H1 in Figure 8) of the inlet / outlet 14C (and outlet / discharge inlet 15C), when chips accumulate to a height lower than the lower end position, as shown by H2 in Figure 8, the illuminated area is covered by the chips. The worker can recognize that the chips in the chip storage section 16 need to be disposed of because the light emitted from the lighting component 31 for the dust collection box becomes invisible due to the chips in the chip storage section 16.

[0041] The irradiation range includes the vicinity of the inlet outlet 14C (and outlet inlet 15C). Therefore, it is easy to recognize in advance when chips are likely to accumulate near the outlet inlet 15C in the chip collection section 16. When chips accumulate near the outlet inlet 15C, backflow of chips from the outlet section 15 to the dust collection box 11 is likely to occur. However, because it is easy for the operator to recognize when chips are likely to accumulate near the outlet inlet 15C, the operator can discard the chips in the dust collection box 11 in advance, thereby suppressing the occurrence of backflow.

[0042] As shown in Figure 10, the circular saw 1 has a work lighting member 35. The work lighting member 35 is, for example, a chip LED, which illuminates the cutting edge of the circular saw blade 10 and the work area of ​​the workpiece.

[0043] The lighting components 31 for the dust collection box and 35 for work can be switched on and off individually or collectively by operating the switch panel 40 provided on the handle housing 4.

[0044] As shown in Figures 3, 4, 7(B), and 8-10, the circular saw 1 has a holding member 20. The holding member 20 is a member that holds the dust collection box lighting member 31 and the work lighting member 35, as well as the first wiring 32, second wiring 36, and third wiring 38 for supplying power to them. The first wiring 32, second wiring 36, and third wiring 38 connect the dust collection box lighting member 31 and the work lighting member 35 in series with each other between the output terminals of a lighting power supply (not shown) that generates power for driving the lighting using the power of the battery pack 5.

[0045] The first wiring 32 electrically connects the positive (or negative) terminal of the lighting power supply to the dust collection box lighting component 31. The second wiring 36 electrically connects the negative (or positive) terminal of the lighting power supply to the work lighting component 35. The third wiring 38 electrically connects the dust collection box lighting component 31 and the work lighting component 35. Note that the connection configuration of the dust collection box lighting component 31 and the work lighting component 35 may be parallel connection.

[0046] The retaining member 20 is connected and fixed to the gear case 7 by screws or the like, and is located to the left of the gear case 7. Alternatively, the retaining member 20 is sandwiched between the gear case 7 and the handle housing 4 from the left and right directions.

[0047] The retaining member 20 has, for example, a two-part structure, specifically a left retaining member 21 and a right retaining member 22 that are fixed and integrated with each other by screws or the like. The left retaining member 21 and the right retaining member 22 are, for example, resin molded bodies made of polycarbonate.

[0048] The left retaining member 21 has a left base 23, a left first extension 25, and a left second extension 27. The right retaining member 22 has a right base 24, a right first extension 26, and a right second extension 28.

[0049] The left base 23 and the right base 24 are combined to form the base of the retaining member 20 (hereinafter referred to as the "base"). The base is provided with a wiring opening 29 and an exhaust port 30.

[0050] The wiring opening 29 opens to the left and is used to pass the first wiring 32 and the second wiring 36 through the base. In other words, the base accommodates a portion of each of the first wiring 32 and the second wiring 36.

[0051] The exhaust port 30 opens forward and functions as an exhaust port for the airflow generated by the fan 47. That is, the airflow generated by the fan 47 cools the motor 45, enters the base through the wiring opening 29, flows through the base towards the exhaust port 30, and is exhausted to the outside from the exhaust port 30. The exhaust port 30 is also shown in Figure 4. In this way, the holding member 20 also functions as a flow guide that guides the exhaust of the cooling air from the motor 45. This enables exhaust in the appropriate direction.

[0052] The left first extension portion 25 and the right first extension portion 26 are combined to form the first extension portion of the retaining member 20 (hereinafter referred to as the "first extension portion"). The first extension portion extends upward from the base and bends in an L-shape to extend backward. The first extension portion accommodates the other part of the first wiring 32 (the part that extends from the base) and a part of the third wiring 38.

[0053] The right first extension 26 has a dust collection box lighting holder housing 26a at its tip. The dust collection box lighting holder housing 26a opens to the right so as to communicate with the opening 7a of the gear case 7. The right end of the dust collection box lighting holder housing 26a fits into the opening 7a and is positioned relative to the gear case 7. The circular saw 1 has a dust collection box lighting holder 33 as a holder member inside the dust collection box lighting holder housing 26a, facing the opening 7a. The dust collection box lighting holder 33 holds the dust collection box lighting member 31. That is, the dust collection box lighting member 31 is held in the opening 7a.

[0054] The left second extension portion 27 and the right second extension portion 28 are combined to form the second extension portion of the retaining member 20 (hereinafter referred to as the "second extension portion"). The second extension portion extends downward from the base and accommodates the other part of the second wiring 36 (the part extending from the base) and the other part of the third wiring 38 (the part extending from the first extension portion). In other words, the third wiring 38 extends across the first extension portion and the second extension portion.

[0055] The left second extension 27 has a work light holder housing 27a at its tip, which opens to the right. The circular saw 1 has a work light holder 37 inside the work light holder housing 27a. The work light holder 37 holds the work light member 35.

[0056] The retaining member 20 is held in the gear case 7. That is, the lighting member 31 for the dust collection box and the working lighting member 35 are held in the gear case 7.

[0057] According to this embodiment, the following effects can be achieved.

[0058] (1) The circular saw 1 has a lighting member 31 for the dust collection box that shines light toward the translucent wall of the dust collection box 11. As a result, the inside of the dust collection box 11 is easy to see even in the dark, improving work efficiency. Also, because the inside of the dust collection box 11 is easy to see, it is easy to know when it is time to discard the chips inside the dust collection box 11, which prevents excessive accumulation of chips inside the dust collection box 11 and prevents backflow of chips that may occur outside the dust collection box 11 due to excessive accumulation. In particular, the lighting member 31 for the dust collection box 11 (chip storage section 16) extends in the front-to-back direction, and is configured to illuminate from left to right, making the chip storage section 16 easy to see overall. If the chip storage section 16 were to be illuminated from either the front or back direction, it may be difficult to see the whole thing depending on the height of the accumulated chips. For example, if metal chips accumulate concentrated in the rear portion of the chip collection section 16, forming a pile, illuminating the chip collection section 16 from the rear may cause the front portion to be cast a shadow, making it difficult to see. In this respect, this embodiment allows for convenient viewing of the inside of the dust collection box 11.

[0059] (2) When viewed in the direction of the rotation axis (axis A2) of the circular saw blade 10, the lighting member 31 for the dust collection box is positioned to overlap with the chip storage section 16. This prevents direct viewing of the lighting member 31 when viewing the dust collection box 11 from the right side, and allows for optimal illumination of the inside of the chip storage section 16, thereby improving the workability for checking the inside of the dust collection box 11. In terms of preventing direct viewing of the light, the lighting member 31 for the dust collection box could also be positioned to overlap with the inlet 14 (or outlet 15), but for checking the inside of the chip storage section 16, it is better for it to overlap with the chip storage section 16 along axis A2 (left-right direction). Furthermore, the lighting member 31 for the dust collection box is positioned to be located behind the inlet 14 (inlet inlet 14C), which is located in front of the chip storage section 16, or behind the outlet 15 (or outlet inlet 15C). Therefore, it is possible to reduce the amount of light directed to the inlet 14 (or outlet 15), where there is little need to check the inside, while increasing the amount of light directed to the chip storage section 16, thereby improving work efficiency. Furthermore, the lighting member 31 for the dust collection box is configured to illuminate the vicinity of the discharge inlet 15C (or inlet / outlet 14C) of the dust collection box 11. Specifically, the lighting member 31 for the dust collection box is positioned opposite the left side of the front half of the chip storage section 16. Therefore, the worker can recognize in advance that chips are likely to accumulate in the chip storage section 16 up to the vicinity of the discharge section 15 and dispose of the chips in the dust collection box 11, thereby suppressing the occurrence of backflow.

[0060] (3) The lighting member 31 for the dust collection box is positioned below the lower end position (H1 in Figure 8) of the inlet 14 and outlet of the dust collection box 11. Therefore, when chips accumulate to a height shown as H2 in Figure 8, which is lower than the lower end position, the illumination range is covered by the chips. The worker can recognize that the chips in the chip storage section 16 need to be discarded when the light emitted from the lighting member 31 for the dust collection box becomes invisible due to the chips in the chip storage section 16. Due to the structure of the dust collection, chips tend to accumulate from the rear to the front of the chip storage section, but as described above, by positioning the lighting member 31 for the dust collection box opposite the front half of the chip storage section 16, it is possible to suppress the light becoming invisible prematurely. Therefore, it is possible to recognize the need to discard the chips after sufficient dust collection has been made, thereby improving work efficiency.

[0061] (4) The lighting component 31 for the dust collection box is retained in the gear case 7 even when the dust collection box 11 is removed, thus suppressing positional displacement associated with the attachment and detachment of the dust collection box 11. In addition, compared to the case where it is attached to the saw cover 8, the lighting component 31 for the dust collection box is already retained when the saw cover 8 is attached to the gear case 7, making assembly easier.

[0062] (5) Because the retaining member 20 that holds the dust collection box lighting member 31 is held by the gear case 7, assembly is easier compared to a configuration in which the retaining member 20 is sandwiched between a split housing. Also, because the top and bottom of the dust collection box lighting member 31 are covered with metal parts, impacts are less likely to be transmitted to the dust collection box lighting member 31 (the gear case 7 is less likely to deform), and damage or deformation of the dust collection box lighting member 31 can be suppressed.

[0063] (6) At least a portion of the right side of the dust collection box 11 (the side opposite to the side where the lighting component 31 for the dust collection box is located) is a viewing wall that allows the inside to be seen from the outside. Therefore, the worker can also see the inside of the dust collection box 11 from the right. When viewed from the right, the light from the lighting component 31 for the dust collection box is blocked at the height of the metal chips inside the dust collection box 11, making it easy to grasp the height of the metal chips accumulated inside the dust collection box 11. In addition, checking from the right is a check from a direction intersecting the work direction (forward direction), which is easier to check and improves work efficiency compared to checking from the work direction.

[0064] (7) Since the lighting member 31 for the dust collection box and the lighting member 35 for work are held by a single holding member 20, an increase in the number of parts can be suppressed.

[0065] (8) The light emitted by the dust collection box lighting component 31 is directed onto the dust collection box 11 via the saw cover 8 that covers the opening 7a of the gear case 7. Therefore, the dust collection box lighting component 31 is not exposed to the outside, thus preventing damage. In addition, some of the light emitted by the dust collection box lighting component 31 that is directed upward is blocked by the gear case 7. This makes it less likely to be dazzling when viewing the dust collection box 11 from directly above.

[0066] Figure 11 is a right side view of a circular saw 1A according to another embodiment of the present invention. In the circular saw 1A, the dust collection box 11 of the circular saw 1 described above is replaced with a dust collection box 11A. The dust collection box 11A differs from the dust collection box 11 described above in that it has a light-shielding portion 53 on its right side, and is otherwise the same.

[0067] In this example, the light-shielding section 53 is a plurality of vertically elongated rectangles arranged at predetermined intervals in the front-to-back direction. The lighting member 31 for the dust collection box is located within the front-to-back arrangement range of the light-shielding section 53.

[0068] The light-shielding portion 53 may be, for example, a painted portion coated with colored paint, or a light-shielding seal. The right side of the dust collection box 11A may display the manufacturer's or brand's logo and serve as the light-shielding portion 53.

[0069] The light-shielding portion 53 prevents direct viewing of the light source portion of the dust collection box lighting component 31 when viewing the inside of the dust collection box 11A from directly to the side (right), thereby improving work efficiency. This effect is more pronounced when one of the light-shielding portions 53 is positioned at the same location as the dust collection box lighting component 31 in the front-to-back direction. Furthermore, this effect is more pronounced when the range of the light-shielding portion 53 in the vertical direction includes the dust collection box lighting component 31.

[0070] By arranging the light-shielding sections 53 intermittently in the front-to-back direction, the height position of the chips inside the dust collection box 11A can be seen through the gaps between adjacent light-shielding sections 53.

[0071] Since the light-shielding section 53 is located below the upper end position of the front wall of the chip storage section 16 (the lower end position of the inlet / outlet 14C and the outlet / discharge inlet 15C), the upper surface position of the chips is easily visible when the chip storage section is nearly full.

[0072] Since the light-shielding section 53 only requires painting or the like to a part of the dust collection box 11A, which is molded entirely from transparent resin, it is easier to manufacture and more cost-effective compared to a configuration in which a transparent window is formed in a dust collection box that is molded entirely from opaque resin.

[0073] The present invention has been described above using embodiments as examples, but it will be understood by those skilled in the art that various modifications are possible to each component and each processing step of the embodiments within the scope of the claims. Modifications will be discussed below.

[0074] At least one of the lighting component 31 for the dust collection box and the lighting component 35 for work may have its directivity enhanced by a lens or the like. The circular saw of the present invention is not limited to a cordless type that operates on the power of a battery pack, but may also be a corded type that operates on power from an external AC power source. [Explanation of symbols]

[0075] 1...Circular saw, 2...Base, 3...Motor housing, 4...Handle housing, 5...Battery pack, 6...Trigger switch, 7...Gear case, 7a...Opening (through hole), 8...Saw cover (inner cover), 9...Protective cover, 10...Circular saw blade, 11, 11A...Dust collection box (dust box), 12...Left dust collection box, 13...Right dust collection box, 14...Inlet, 14A...Inlet inlet, 14B...Inlet passage, 14C...Inlet outlet, 15...Discharge section, 15A...Discharge outlet, 15B...Discharge passage, 15C...Discharge inlet, 16...Chip storage section (dust collection chamber), 17...Dust cover, 17a...Hook section, 18...Latch, 19...Cap, 20...Retaining member, 21...Left retaining member, 22... Right holding member, 23... left base, 24... right base, 25... left first extension, 26... right first extension, 26a... dust collection box lighting holder housing, 27... left second extension, 27a... work lighting holder housing, 28... right second extension, 29... wiring opening, 30... exhaust port, 31... dust collection box lighting component, 32... first wiring, 33... dust collection box lighting holder, 35... work lighting component, 36... second wiring, 37... work lighting holder, 38... third wiring, 39... connector, 40... switch panel, 41... rotation support mechanism, 42... tilt support mechanism, 45... motor, 46... motor shaft, 47... fan, 48... inverter board, 49... transmission mechanism (reduction mechanism), 53... light shielding part.

Claims

1. Motor and, A housing for the motor, A base located below the motor and connected to the housing, A circular saw blade rotated by the aforementioned motor with the left-right axis, A saw cover that covers at least a portion of the circular saw blade, A transmission mechanism for transmitting the rotational force of the motor to the circular saw blade, A gear case housing the aforementioned transmission mechanism, A dust collection box connected to the saw cover and configured to collect chips generated by the cutting process, A part of the dust collection box, comprising a translucent wall that allows light to pass from the outside to the inside of the dust collection box, The dust collection box includes an illumination member that irradiates light from the outside toward the light-transmitting wall, The dust collection box has an upper part that is located above the gear case and to one side in the left-right direction above the lighting member. The upper part has a left side portion facing to the left and a right side portion facing to the right. The left and right side portions are translucent. The lighting member is capable of illuminating the inside of the dust collection box through the light-transmitting wall by irradiating light toward one side in the left-right direction, and the irradiation range is such that it passes through the inside of the upper part. A circular saw in which the operator can see the interior of the upper part from either the left side or the right side.

2. A circular saw that operates in a forward direction, The dust collection box has an inlet through which the metal chips pass, The circular saw according to claim 1, wherein the lighting member is located behind the inlet.

3. The dust collection box has a chip storage section for storing the chips, The circular saw according to claim 1 or 2, wherein the lighting member is positioned to overlap with the chip collection section when viewed in the direction of the rotation axis of the circular saw blade.

4. The circular saw according to any one of claims 1 to 3, wherein the lighting member is held in the gear case.

5. The dust collection box has an inlet through which the metal chips pass, and an outlet that discharges the air inside the dust collection box to the outside of the dust collection box. The circular saw according to claim 1 or 3, wherein the lighting member is configured to illuminate the vicinity of the discharge section.

6. The circular saw according to claim 5, wherein the lighting member is located below the lower end position of the inlet or the lower end position of the outlet.

7. The circular saw according to claim 4, wherein an opening is formed in the gear case, the lighting member is held by a holder member, and the holder member is held in the opening.

8. The dust collection box is detachably attached to the upper side of the saw cover. The circular saw according to any one of claims 1 to 7, wherein the lighting member is provided on one side of the saw cover in the left-right direction.

9. The circular saw according to any one of claims 1 to 8, wherein the dust collection box is provided with a viewing wall on the side opposite to the side where the lighting member is located, allowing the inside to be seen from the outside.

10. A circular saw according to any one of claims 1 to 9, comprising a work lighting member for illuminating the work area.

11. The aforementioned lighting component and the aforementioned work lighting component are each supplied with power from the power source by first wiring and second wiring, respectively. The circular saw according to claim 10, wherein the first wiring and the second wiring are held by a holding member.

12. The circular saw according to claim 11, wherein the holding member has a base portion that accommodates a portion of the first wiring and a portion of the second wiring, a first extension portion that extends from the base portion and accommodates the other portion of the first wiring, and a second extension portion that extends from the base portion and accommodates the other portion of the second wiring.

13. The circular saw according to claim 4 or 7, wherein the saw cover is attached to the right side of the gear case, and the lighting member irradiates light onto the light-transmitting wall through the saw cover.

14. The circular saw according to any one of claims 1 to 13, wherein the lighting member is located above the upper end position of the circular saw blade.

15. The circular saw according to claim 1, wherein the optical axis of the lighting member is inclined upward with respect to one side in the left-right direction.

16. The circular saw according to claim 1, wherein a portion of the light emitted by the lighting member is blocked by the non-transparent member, thereby reducing the amount of light traveling upward within the upper part.

17. The circular saw according to claim 16, wherein the non-transparent member is part of the gear case.

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