JP4677531B2 - Dust collecting adapter for rotary cutting machine - Google Patents

Description

  The present invention relates to a dust collecting adapter mounted on a rotary cutting machine such as a disk grinder.

  Generally, in order to cut concrete or the like, a work is often performed using a disc grinder equipped with a stone cutter, but the diffusion state of dust generated at the time of cutting is intense. Dust not only harms the health of workers, but can also lead to contamination of the surrounding environment. Therefore, in order to improve the above problem, the present inventor covers a cutter mounted on a disk grinder with a protective cover, installs a discharge duct behind the protective cover, and connects a dust collector to the duct. Is disclosed in Japanese Patent Application No. 2008-12025.

  If cutting operation is performed while using the dust collecting device disclosed in Japanese Patent Application No. 2008-12025, dust collected inside the protective cover can be immediately collected into the dust collector by the suction force of the dust collector. The operator can work comfortably, and the labor of cleaning after the work is greatly reduced.

  However, in actual work sites, there are many places where it is very difficult for an operator to bring a dust collector together with a disk grinder, such as a high place or a closed place. Also, not all workers have dust collectors. Therefore, many workers are now demanding an apparatus that can collect dust generated by a disc grinder without using a dust collector.

  In response to the above request, for example, Patent Document 1 introduces a dust collecting adapter for a disk grinder that does not connect a dust collector and collects dust in a separately provided collecting portion using the inertial force generated by the rotation of the cutter. Yes. However, in actual cutting work, it is unlikely that all of the dust will flow to the dust collection part above the cover only by the inertial force due to the rotation of the cutter, and there is a possibility that part of the dust will accumulate inside the cover. high. The dust that has accumulated can flow back to the blade portion of the rotating cutter, and can cause cutting friction of the cutter, heat generation, and significant deterioration of the cutting ability. Therefore, it seems that the dust collecting adapter of Patent Document 2 still has room for significant improvement.

  On the other hand, Patent Document 2 introduces an electric cutter with a dust collection cover in which a fan is attached to a cutter rotation shaft portion and dust is fed into a dust collection bag using an air flow generated by the rotation. However, according to the inventor's verification, since the airflow generated by the fan diverges in all directions in the device configuration of Patent Document 2, if there is an airflow that sends dust into the dust collection bag, The air current that is discharged to the lower end surface opening portion is also generated at the same time, and it seems that the results described in Patent Document 2 are not actually obtained. In addition, in the apparatus configuration disclosed in Patent Document 2, the dust collection bag is positioned on the workpiece in the cutting progress direction, so that the operator cannot see the marking line drawn on the workpiece and perform an accurate cutting operation. It is extremely difficult to do.

  As described above, there is no dust collecting adapter for a rotary cutting machine that can collect dust without using a dust collector and has sufficient practicality.

JP-A-10-277907 JP 2004-142398 A

  As described above, the dust collector-connected rotary cutters that have been used in the past are inconvenient at work sites where it is difficult to bring in dust collectors such as high places and closed places. Is insufficient in terms of dust collection ability.

  An object of the present invention is to provide a dust collecting adapter for a rotary cutting machine that solves the above-mentioned problems and has excellent dust collecting ability and is easy to use even at work sites such as high places and closed places without being connected to a dust collector. .

The above object is achieved, for example, by a dust collecting adapter (1) for a rotary cutting machine having the following configuration. That is,
A dust collecting adapter (1) for a rotary cutting machine in which a disc-shaped cutter (101) is mounted on a rotary shaft (102),
A first cover part (10) in which an inner wall (15) and a dust discharge duct (11) are formed;
A second cover part (20) in which an inner wall (25) is formed and connected to the first cover part (10) to form a hollow space (50) for accommodating the cutter (101) and a dust passage (51) )When,
With
Projections projecting toward the side surface of the accommodated cutter (101) in the front region in the cutter cutting direction on at least one of the inner walls (15, 25) of the first and second cover parts (10, 20) A sealing member provided with a portion (22) and partitioning the dust passage (51) and the hollow space (50) and filling a gap between the inner wall (15, 25) and the side surface of the cutter (101). It is and,
The sealing member includes the dust on the inner wall (15, 25) of at least one of the first and second cover parts (10, 20) and from the inlet opening (11a) of the duct (11). A belt-like elastic body (53) provided to extend to the central portion of the passage (51) is included, and the belt-like elastic body (53) includes the belt-like elastic body (53) and the inner walls (15, 25). Having a thickness (Tb) that slightly touches the side surface of the cutter (101) when provided on the top,
Guide rails (17, 27) extending along the entire length (Lb) of the belt-like elastic body (53) and having a convex section on the inner walls (15, 25) in the cutting direction of the belt-like elastic body (53). A dust collection adapter (1) characterized in that is provided .

  According to the present invention, if the worker attaches only the dust collecting adapter according to the present invention to the rotary cutting machine, the worker can collect dust at a high dust collection rate and perform the cutting work without connecting the dust collecting machine. it can. That is, the dust passage for carrying the dust has an extremely small cross-sectional area and is provided with a sealing member for preventing the leakage of the dust in each area of the inner walls of the first and second covers. The dust is further accelerated in the dust passage placed under high pressure and discharged into a duct that is the only route.

  In addition, according to the present invention, a dust collecting adapter for a rotary cutting machine that is extremely gentle not only on the surrounding environment but also on the health of the operator is provided. In addition, according to the present invention, it is possible to perform a comfortable work with minimal dust scattering even in a work place in a closed place or a high place where it has been difficult to bring a dust collector.

It is the perspective view which showed the dust collection adapter of this invention from the front direction. It is the disassembled perspective view which showed the dust collection adapter of this invention from the one surface side. It is the disassembled perspective view which showed the dust collection adapter of this invention from the other surface side. It is the perspective view which showed the dust collection adapter of this invention from the bottom face direction. It is the perspective view which showed the dust collection adapter of this invention from the plane direction. It is a fragmentary sectional view of the dust collection adapter of the present invention which shows the flow situation of dust in a dust passage. It is the figure which showed the suitable dimension of the slit provided in the base plate of this invention. It is the figure which showed the detail of the inner wall of the 1st cover of this invention. It is the figure which showed the detail of the inner wall of the 1st cover of this invention. It is the figure which showed the flow guide and strip | belt-shaped elastic body of this invention. It is the figure shown to the dust collection adapter of this invention which replaced with the dust bag and equipped with the hose.

  Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings. In addition, this invention is not limited to these Examples at all. Moreover, the same code | symbol is used for the same or corresponding member in each figure.

  As shown in FIG. 1, the dust collecting adapter 1 of the present invention is attached to a rotary cutting machine (a disk grinder in the illustrated example) 100 to which a disc-like cutter 101 is attached. The dust collecting adapter 1 includes a first cover 10 that is mounted near the disc grinder 100 and a second cover 20 that is mounted away from the disc grinder 100. The first and second covers 10 and 20 are connected by screws 30a, 30b, and 30c, for example, as shown in FIG. 3, and a cutter 101 and each side surface of the cutter 101 are disposed inside the dust collecting adapter 1 as shown in FIG. A hollow space 50 that accommodates the flange 110 attached to is formed. In the front part of the hollow space 50 in the cutting direction (hereinafter, “front direction” means “cutting direction”), the dust extends along the tangential direction of the rotation circle defined when the cutter 101 rotates. A passage 51 is included (see FIG. 6).

  Here, the first and second covers 10 and 20 are preferably molded by performing injection molding on a thermoplastic resin. In addition, in the present specification, the first and second covers 10 and 20 are described as separate single members. However, the first and second covers 10 and 20 are not necessarily limited to this and are integrally molded by injection molding or the like. May be. That is, a cover in which the first cover portion 10 and the second cover portion 20 are integrally molded may be used as a component of the present invention.

  By using the injection molding, the dust collection adapter 1 can be reduced in weight and mass productivity. More preferably, the first and second covers 10 and 20 are made of an uncolored transparent material. As a result, the hollow space 50 and the dust passage 51 formed by connecting the first cover 10 and the second cover 20 are easily visible to the operator from the outside of the dust collecting adapter 1, for example, as shown in FIG. 5. In addition, the operator can visually grasp the cutting position of the material to be cut from any direction of the dust collecting adapter 1 and can confirm the dust collecting state of the dust during the cutting operation. In addition, when the dust collecting adapter 1 is broken or repaired, there is an advantage that it becomes easy to specify the broken or repaired part.

  The first cover 10 further includes a duct 11. As shown in FIG. 6, the inlet 11 a of the duct 11 is connected to the outlet opening 51 b of the dust passage 51, and the dust bag 40 is attached to the outlet 11 b of the duct 11. The duct 11 extends in the tangential direction of the rotation circle of the cutter 101 in the outlet opening 51b of the dust passage 51 (that is, extends obliquely upward opposite to the cutter 101 cutting direction) and away from the disc grinder 100. Inclined.

  Dust generated when the cutter 101 cuts the material to be cut by the dust passage 51 and the duct 11 configured as described above is swung along the outer periphery of the cutter 101 from the dust passage inlet opening 51a. It is smoothly guided to the duct 11 through the outlet opening 51 b and collected in the dust bag 40. The dust bag 40 is provided with a fastener-type opening / closing portion (not shown), and the dust bag 40 is repeatedly used by opening the opening / closing portion and taking out and discarding the dust collected in the dust bag 40. Is possible.

  Further, as shown in FIG. 5, since the duct 11 is inclined in a direction away from the disc grinder 100 (that is, an operator's hand holding the disc grinder 100), the dust bag 40 attached to the duct 11 is There is no obstruction of the operator's field of view in the front of the cutting direction or obstructing the operator to hold the disc grinder 100.

  Moreover, the dust collection adapter 1 of this invention is further provided with the base plate 41, the base 43, and the disk grinder attachment adapter 44, as shown in FIG.2 and FIG.3.

  The base plate 41 is made of a metal plate, and a hole 41a that allows the spindle 102 of the disc grinder 100 to pass therethrough is formed substantially at the center. The base plate 41 is rotatably connected to the first cover 10 by inserting a sleeve 41c fixed to the base plate 41 with a screw 41b through a hole 12 provided at the tip of the first cover 10. The movable range of the base plate 41 is limited by the hook 13 provided on the first cover 10, and when the base plate 41 is locked to the hook 13, the movement of the sleeve 41c in the axial direction is also suppressed. It will be. At this time, the base plate 41 can be fixed to the first cover 10 by fastening a bolt 41 d with a knob to the female screw 14 provided on the first cover 10.

  Further, the sleeve 41 c inserted into the hole 12 at the tip of the first cover 10 is further inserted into the hole 43 a of the base 43. Thereby, the base 43 is connected to the first and second covers 10 and 20 and the base plate 41 in a rotatable state. After the base 43 is connected, a screw 43d is fastened to a female screw (not shown) provided at the end of the sleeve 41c via a washer 43c. Thereby, both the base 43 and the base plate 41 are held without being detached from the first and second covers 10 and 20.

  The base 43 is provided with a long link hole 43b formed in a fan shape around the axis of the sleeve 41c. The second cover 20 is provided with a female screw 21 at one point on the track defined by the long link hole 43b when the base 43 is connected to the second cover 20. The base 43 can be fixed to the second cover 20 by fastening the knob-attached bolt 43f from above the link long hole 43b toward the female screw 21.

  A disc grinder mounting adapter 44 is provided on the side surface of the base plate 41 on the disc grinder 100 side. As shown in FIGS. 2 and 3, for example, the disc grinder mounting adapter 44 may be composed of a pair of semicircular metal bands and a plurality of fasteners for fixing both ends of the metal bands. The adapter 44 defines a space that fits the inner peripheral edge of the hole 41a of the base plate 41 and through which the spindle 102 of the disc grinder 100 can be inserted. Moreover, if a long screw is used in the axial direction for the fastener, the size of the space of the disc grinder mounting adapter 44 can be changed (that is, adapted to the gear case 103 having various shapes). Therefore, the dust collecting adapter 1 of the present invention can be mounted on various types of disc grinders 100.

  As shown in FIGS. 2 to 4, the base plate 41 is integrally formed with a bottom plate 42 provided with a slit 42 a that passes through the cut portion of the cutter 101. It is substantially L-shaped. When the base plate 41 is locked to the hook 13 as described above, the bottom plate 42 is formed on the bottom surface of the hollow space 50 formed by the first and second covers 10 and 20 as shown in FIGS. Is configured to cover almost completely.

Here, as shown in FIG. 4, the slit 42 a on the bottom plate 42 has a minimum dimension that allows the cutter 101 to pass in both the radial direction and the rotational axis direction. Preferably, as shown in FIG. 7, the length L of the slit 42a is larger than the chord D2 of the arc portion of the cutter 101 exposed to the outside of the dust collecting adapter 1 and smaller than the diameter D1 of the cutter 101 (D2 <L <D1). ). Preferably, the width W of the slit 42a is 5 times to 15 times as large as the thickness _{T c} of the cutter _{101 (5T c <W <15T} c).

  The slits 42a defined by the preferable dimensions as described above are generated at the cutting portion of the cutter 101 while allowing the mounting error and the rotation error of the cutter 101 (while avoiding contact with the side surface of the cutter 101). In addition, it is possible to sufficiently take the dust swirling in the cutter rotation direction into the dust passage inlet opening 51a. In addition, as shown in FIGS. 4 and 6, the dust passage inlet opening 51 a is almost sealed by the bottom plate 42 except for the slit 42 a through which the cutter 101 is inserted. According to the inventor's verification, most of the dust cut from the material to be cut does not diffuse so much immediately after cutting, and the blade part is caused by the rotational inertia imparted by the blade part of the cutter that contacts the cutting material. Flows into the slit 42a.

Next, the hollow space 50 and the dust passage 51 formed by connecting the first cover 10 and the second cover 20 will be described in detail. The hollow space 50 has a width W _h that can sufficiently accommodate the cutter 101 and the flanges 110 provided on both side surfaces of the cutter 101, and a length L _h that is sufficiently larger than the diameter D1 of the cutter 101. It is a flat space.

Further, the first cover 10 and / or the second cover 20 is provided with a protrusion 22 (in the illustrated example, the protrusion 22 is provided only on the second cover 20). The protruding portion 22 is disposed in a region on the cutting progress direction side of the cutter 101 rotation axis (more preferably, a region on the cutting progress direction side further than the pair of flanges 110 installation region). The width W _ps of the space (that is, the dust passage 51) defined by the projecting portion 22 having the above-described configuration, the cutter 101 and the inner walls 15 and 25 of the first and second covers 10 and 20 is the width of the hollow space 50. It can be made much smaller than the width W _h (for example, W _ps may be less than half of W _h , W _ps ≦ W _h / 2). That is, it is a major feature (first feature) of the present invention that the cross-sectional area of the dust passage 51 is limited to be as small as possible by installing the protruding portion 22.

  The protrusion 22 may be formed integrally with the first and second covers 10 and 20 when the first and second covers 10 and 20 are injection-molded. You may install in the covers 10 and 20.

  Further, as shown in FIG. 3 or FIG. 10, a flow guide 52 having a substantially rectangular parallelepiped is formed at a position below the duct inlet 11a on the inner walls 15 and 25 of the first cover 10 and / or the second cover 20. Is provided. The flow guide 52 is an elastic body made of rubber or resin. By the flow guide 52 arranged and configured in this way, the outlet opening 51b of the dust passage 51 is strictly partitioned by the hollow space 50, and the dust passage 51 is further restricted. For example, even if a part of the dust does not flow into the duct inlet 11a and tries to flow backward together with the rotating cutter 101, the flow guide 52 sandwiched between the first and second covers 10 and 20 is part of the dust. Dampen. Dust that has lost its destination will be guided to the adjacent duct 11 in a lower pressure state.

  Further, preferably, as shown in FIG. 10, the flow guide 52 has a shape with a step on the surface contacting the inner walls 15 and 25 of the first and second covers 10 and 20, and the flow guide 52 is in contact with the flow guide 52. The inner wall portion is provided with recesses 16 and 26 that are recessed from other inner wall surfaces. Accordingly, the step 52a having a high step of the flow guide 52 is embedded in the recessed portions 16 and 26, and the positioning, installation, and attachment / detachment of the flow guide 52 are facilitated. In addition, if the flow guide 52 is removed from the inner walls 15 and 25, the dimension (diameter) of the cutter 101 which can be used for the dust collecting adapter 1 of the present invention can be increased.

  More preferably, as shown in FIG. 10, the flow guide 52 has a length that extends toward and slightly contacts the edge of the cutter 101 when the flow guide 52 is installed on the inner walls 15 and 25. A tongue portion 52b having a thickness is formed. The tongue 52b is thin, and if the blade of the cutter 101 comes into contact with a part of the tongue 52b, only the contact portion can be easily scraped. The flow guide 52 is more preferably made from a silicone rubber having a hardness of about 50 degrees (JIS Hs50 or ISO Shore A50). With the tongue 52b having such a configuration, the dust passage outlet opening portion 51b is more sealed, and the dust moving through the dust passage 51 is forced into the duct 11 without leaking into the hollow space 50. Will be guided.

More preferably, as shown in FIGS. 8 and 9, on the inner walls 15 and 25 of the first cover 10 and / or the second cover 20, the flow guide installation recesses 16 and 26 are disposed in front (in the cutting direction). A slender belt-like elastic body 53 is provided from the advancing direction) toward the dust passage inlet opening 51a. The belt elastic material 53 preferably has a thickness _{T b} of the extent that slightly contacts the cutter 101 when installed on the inner wall 15, 25 of the first and second cover 10 and 20 (e.g., the total thickness _{T b} of the band-like elastic member 53 provided on the inner wall 15 and 25, may be a value obtained by subtracting the thickness _{T c} of the cutter 101 from the width _{W ps} dust passageway 51. that is, _{T b} = (W _ps -T _c ) / 2). Further, the belt-like elastic body 53 is preferably made of soft rubber, so that even if the blade edge contacts the belt-like elastic body 53 when the cutter rotates, only the contact portion is easily scraped off. Further, the belt-like elastic body 53 is preferably made of a soft rubber having a hardness of about 60 degrees (JIS Hs60 or ISO Shore A60). With the belt-like elastic body 53 having such a configuration, the gap between the first and second covers 10 and 20 and the side surface of the cutter can be further narrowed, and in the region from the center of the dust passage 51 to the outlet opening 51b, The dust passage 51 and the hollow space 50 are more strictly partitioned, and the sealing performance of the dust passage 51 is further improved in this region.

More preferably, on the inner walls 15 and 25 of the first cover 10 and / or the second cover 20, the cross section has a convex portion and has a length substantially equal to the length L _b of the belt-like elastic body 53. Guide rails 17 and 27 are provided in front of the belt-like elastic body installation region. The guide rails 17 and 27 may cause dust energized by the rotational force of the cutter 101 to enter between the belt-like elastic body 53 and the inner walls 15 and 25, so that the belt-like elastic body 53 may be peeled off from the inner walls 15 and 25. Can be eliminated. The rear guide rails 18 and 28 may also be provided behind the belt-like elastic body installation region, which facilitates positioning, installation and fixing of the belt-like elastic body 53. These guide rails 17, 18, 27, 28 may be integrally formed with the first and second covers 10, 20 when the first and second covers 10, 20 are injection molded. You may install in the 1st, 2nd cover 10 and 20 as another component.

  In addition, the edge 15a of the inner wall 15 of the first cover 10 is fitted to the edge 25a of the inner wall 25 of the second cover 20 throughout. Preferably, the cross section of the edge 15a of the inner wall 15 of the first cover 10 forms a concave portion (or convex portion), and the cross section of the edge portion 25a of the inner wall 25 of the second cover 20 forms a convex portion (or concave portion). Configure as follows. As a result, when the first and second covers 10 and 20 are connected and fixed to each other, the entire connection area is sealed without gaps, and dust is prevented from leaking from the dust collecting adapter 1 except for the duct 11. Can do.

  In addition, the first and second covers 10 and 20 may include outer walls 19 and 29 that are spaced apart from the inner walls 15 and 25 in front of the cutting direction and in which the edge portions 19a and 29a are fitted to each other. Moreover, it is preferable that the edge cross sections of the outer walls 19 and 29 also have a concave or convex shape, similarly to the edge cross sections of the inner walls 15 and 25. Thereby, the wall of the dust collecting adapter 1 in the cutting direction forward of the dust passage 51 has a double structure, and a part of the dust has a large rotational inertia force, and the outside of the inner walls 15, 25 from the dust passage 51 under high pressure. In the unlikely event of leakage, there is a space between the inner walls 15 and 25 and the outer walls 19 and 29 separated from the inner walls 15 and 25, so that the leaked dust can be captured. It is possible to eliminate the possibility of dust leakage from the outside of the dust adapter 1.

  As described above, in the preferred embodiment of the present invention, (1) the dust passage inlet opening 51a is provided with the slit 42a having the opening area as small as possible and the bottom plate 42 closing the inlet opening 51a. . In addition, (2) the dust passage outlet opening 51b is provided with a flow guide 52 that prevents dust from leaking into the hollow space 50 and forcibly guides it to the duct inlet 11a. Further, (3) a belt-like elastic body is provided along the edge from the center of the dust passage to the outlet opening. As described above, the main feature (second feature) of the present invention is that the restricting member for ensuring the sealing property of the dust passage is arranged at each location of the edge of the dust passage.

  The guarantee of the sealing property as the second feature, together with the reduction in the cross-sectional area of the flow passage as the first feature, can remarkably increase the air pressure in the dust passage. The speed of the dust energized by the rotational force further increases, and the dust vigorously passes through the duct 11 and is collected by the dust bag 40. Therefore, it is not necessary to use a dust collector that is essential for dust suction in a conventional ordinary dust collecting adapter.

  As described above, when the worker attaches only the dust collecting adapter 1 according to the present invention to the disc grinder 100, the worker collects dust in the dust bag 40 at a high dust collection rate without cutting the dust collector and performs a cutting operation. It can be performed. That is, the dust passage 51 for carrying the dust has a very small cross-sectional area and a sealing member (for example, the bottom plate 42, the flow guide) that prevents the leakage of dust in the inner walls 15 and 25 of the first and second covers 10 and 20. 52, the belt-like sealing member 53, the edges 15a and 25a of the inner walls 15 and 25, and the edges 19a and 29a of the outer walls 19 and 29), the dust imparted with the rotational inertia force of the cutter 101 can Is further accelerated in the dust passage 51 placed in the air and discharged to the duct 11 and the dust back 40 which are the only paths.

  In addition, according to the present invention, a dust collecting adapter for a rotary cutting machine that is extremely gentle not only on the surrounding environment but also on the health of the operator is provided. In addition, according to the present invention, it is possible to perform a comfortable work with minimal dust scattering even in a work place in a closed place or a high place where it has been difficult to bring a dust collector.

  Next, another usage pattern of the dust collecting adapter 1 according to the present invention will be described.

  In place of the dust bag 40 described above, a hose 45 having an attachment part 45a connected to the duct outlet part 11b can be connected to the duct 11 as shown in FIG. When the dust collecting adapter 1 having such a configuration is attached to the disc grinder 100 and cutting is performed, dust generated from the work material and flowing out of the duct 11 is decelerated in the hose 45. Dust is slowly discharged from the outlet. That is, if a dust collection container (not shown) is installed at the hose outlet, dust can be collected in the container.

  Further, similarly to the conventional dust collection adapter, if a dust collector (not shown) is connected to the tip of the hose 45, it is possible to work at a higher dust collection rate.

  Since the dust collecting adapter 1 of the present invention does not use a dust collector that is essential for many conventional dust collecting adapters, the dust collecting adapter 1 can be used at work sites in closed places or high places where it is difficult to bring the dust collector. Moreover, the dust collecting adapter 1 of the present invention is lightweight and has high visibility and workability. In addition, the dust collecting adapter 1 of the present invention can eliminate dust leakage to the outside of the adapter as much as possible, and provides a comfortable working environment. Therefore, the dust collecting adapter of the present invention is a promising technology with very high industrial applicability because of such many advantages.

1 Dust collection adapter 1
10, 20 First / second cover (or first / second cover part)
DESCRIPTION OF SYMBOLS 11 Duct 11a Duct inlet 15,25 Inner wall 15a, 25a of the 1st, 2nd cover Edge 16,26 Inner wall edge of the 1st, 2nd cover 17,27 Guide rail 19,29 of 1st, 2nd cover Outer wall 42 Bottom plate 42a Slit 50 Hollow space 51 Dust passage 51a Dust passage inlet opening 51b Dust passage outlet opening 52 Flow guide 52a Flow guide stepped area 52b Flow guide tongue 53 Band elastic body 100 Rotation cutting Machine (or disc grinder)
101 Cutter 102 Rotating shaft (or spindle)
The length T _b the thickness of the strip elastic member L _b band elastic body

Claims (9)

A dust collecting adapter (1) for a rotary cutting machine in which a disc-shaped cutter (101) is mounted on a rotary shaft (102),
A first cover part (10) in which an inner wall (15) and a dust discharge duct (11) are formed;
A second cover part (20) in which an inner wall (25) is formed and connected to the first cover part (10) to form a hollow space (50) for accommodating the cutter (101) and a dust passage (51) )When,
With
Projections projecting toward the side surface of the accommodated cutter (101) in the front region in the cutter cutting direction on at least one of the inner walls (15, 25) of the first and second cover parts (10, 20) A sealing member provided with a portion (22) and partitioning the dust passage (51) and the hollow space (50) and filling a gap between the inner wall (15, 25) and the side surface of the cutter (101). And
The sealing member includes the dust on the inner wall (15, 25) of at least one of the first and second cover parts (10, 20) and from the inlet opening (11a) of the duct (11). A belt-like elastic body (53) provided to extend to the central portion of the passage (51) is included, and the belt-like elastic body (53) includes the belt-like elastic body (53) and the inner walls (15, 25). Having a thickness (Tb) that slightly touches the side surface of the cutter (101) when provided on the top,
Guide rails (17, 27) extending along the entire length (Lb) of the belt-like elastic body (53) and having a convex section on the inner walls (15, 25) in the cutting direction of the belt-like elastic body (53). A dust collection adapter (1) characterized in that is provided.   The sealing member is provided on at least one of the inner walls (15, 25) of the first and second cover parts (10, 20) and at an outlet opening part (51b) of the dust passage (51). A dust collecting adapter (1) according to claim 1, characterized in that it comprises a substantially rectangular parallelepiped flow guide (52). The side surface of the flow guide (52) is provided with a tongue (52b) that is thinner than the other parts, and the tongue (52b) is provided on the inner walls (15, 25). The dust-collecting adapter (1) according to claim 2 , wherein the dust-collecting adapter (1) has a thickness that slightly contacts with the blade of the cutter (101) when it is pressed. The flow guide (52) has a stepped side surface,
A recessed portion (16, 26) is provided below the inlet (11a) of the duct (11) on at least one of the inner walls (15, 25) of the first and second cover portions (10, 20). ,
4. The dust collecting adapter (1) according to claim 2 , wherein the stepped region (52 a) of the flow guide (52) is fitted into the recess (16, 26).   The edges (15a, 25a) of the inner walls (15, 25) of the first and second cover parts (10, 20) have a concave or convex cross-sectional shape. The dust collecting adapter (1) according to any one of the above.   The first and second cover portions (10, 20) are further formed with outer walls (19, 29) separated from the front side in the cutting direction of the inner walls (15, 25). Item 6. The dust collecting adapter (1) according to any one of Items 1 to 5. The dust collection adapter (1) includes a bottom plate (42) having a slit (42a) through which a part of the cutter (101) is inserted,
The bottom plate (42) includes the first and second cover portions (10, 20) such that a part of the bottom plate (42) closes most of the inlet opening portion (51a) of the dust passage (51). Cover the bottom of
The dust collecting adapter according to any one of claims 1 to 6, wherein dust generated by cutting the cutter (101) is guided to the dust passage (51) through the slit (42a). 1).   The dust discharge duct (11) extends along a substantially tangential direction of the position of the dust passage outlet opening (51b) in the rotation circle determined when the cutter rotates, and is away from the rotary cutter (100). The dust collecting adapter (1) according to any one of claims 1 to 7, wherein the dust collecting adapter (1) is inclined.   The dust collecting adapter (1) according to any one of claims 1 to 8, wherein the first and second cover parts (10, 20) are made of a transparent resin.

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