Dust collection accessory

Abstract

The invention provides a dust collection accessory which can be detached through simple operation and can effectively prevent accidental falling during detachment. The dust collection attachment (1) comprises: a dust suction unit having a suction inlet through which a tip tool can pass; and a main body section (3) having a dust collection passage (16) which communicates with the dust collection section and which can be connected to an external hose. The main body part (3) is provided with a suction space (20) which is communicated with the dust collection passage (16) and is provided with an adsorption port (28) for adsorbing the processed workpiece (W), an exhaust hole (30) for opening the suction space (20) to the outside, and an exhaust handle (13) for closing the exhaust hole (30) in a normal state and opening the exhaust hole (30) due to a preset operation. The exhaust hole (30) is opened by operating the exhaust handle (13) in the direction in which the main body (3) is detached from the workpiece (W).

Description

Technical Field

[0001] The present disclosure relates to a dust collecting attachment, which is used to collect dust generated from a workpiece when an electric tool such as a hammer drill is used for working. Background Art

[0002] When drilling is performed with an end tool such as a hammer drill, a dust collecting attachment is sometimes used to collect dust in a manner that does not cause dust generated from the workpiece at the processing position to fly. Patent document 1 (U.S. Patent Application Publication No. 2011 / 0142561) discloses an example. The dust collecting attachment disclosed in the document has a cylindrical dust suction portion for the end tool to pass through, which is provided on the upper part of a shell that expands to the left and right. On the one hand, a cylindrical handle portion having a dust collection passage connected to the dust suction portion is formed on the outer side of the shell, and on the other hand, a suction space for the suction port to open is formed on the back side of the shell.

[0003] The dust collection attachment is used by connecting an external dust collector via a hose at the handle. If the dust collector is operated and the suction port is in contact with the surface of the workpiece, the handle and the dust suction part connected to the hose become negative pressure, and the suction space connected to the handle also becomes negative pressure. Therefore, the suction port remains fixed to the workpiece while being sucked in. If the end tool of the power tool is inserted into the dust suction part for processing, the generated dust is directly sucked in from the dust suction part and collected in the dust collector via the handle and the hose.

[0004] The left and right sides of the handle are respectively formed with exhaust holes communicated with the suction space. The exhaust holes are respectively provided with buttons for closing the exhaust holes under normal conditions.

[0005] When removing the dust collection attachment from the workpiece in order to change the processing position, the operator presses the left and right buttons with his fingers to open the exhaust hole. In this way, external air flows into the suction space to reduce the adsorption force, so the dust collection attachment can be directly removed from the workpiece.

[0006] Patent Document 1: U.S. Patent Application Publication No. 2011 / 0142561

[0007] When removing the conventional dust collecting attachment, it is necessary to pull the dust collecting attachment toward the front side intersecting the left and right directions while maintaining the operation of pressing the button from the left and right directions. That is, two operations are required, and therefore, the operability is not good.

[0008] Furthermore, since the direction in which the button is pushed down is different from the direction in which the dust collecting attachment is pulled, there is a concern that the dust collecting attachment may accidentally fall when being removed during work performed against a vertical wall or the like. Summary of the invention

[0009] Therefore, an object of the present disclosure is to provide a dust collecting attachment that can be removed by a simple operation and can effectively prevent accidental dropping when removed.

[0010] In order to achieve the above-mentioned purpose, the present invention discloses a dust collecting accessory, comprising: a dust suction part, which has a suction port that can be passed through by an end tool; and a main body, which has a dust collecting passage that is connected to the dust suction part and can be connected to an external hose. In the dust collecting accessory, the main body is provided with a suction space that is connected to the dust collecting passage and has a suction port for adsorbing a workpiece, an exhaust hole that opens the suction space to the outside, and an exhaust operation part that closes the exhaust hole under normal circumstances and opens the exhaust hole due to a predetermined operation.

[0011] Furthermore, the exhaust operation portion is characterized in that the exhaust hole is opened by being operated together with the action of removing the main body portion from the workpiece.

[0012] According to the present disclosure, the exhaustion formed by the exhaust operation part and the removal of the dust collection accessory are not separate independent operations. Therefore, the dust collection accessory can be removed by a simple operation, and can also effectively prevent accidental falling during removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a perspective view of the dust collecting attachment of Example 1 as viewed from the rear.

[0014] Figure 2 This is a perspective view of the dust collecting attachment of Example 1 as viewed from the front.

[0015] Figure 3 It is a rear view of the dust collection attachment of Example 1.

[0016] Figure 4 yes Figure 3 Enlarged cross-sectional view of line AA.

[0017] Figure 5 yes Figure 3 Enlarged cross-sectional view of line BB.

[0018] Figure 6 yes Figure 3 A partial enlarged cross-sectional view of the CC line.

[0019] Figure 7 This is an enlarged sectional view of the exhaust handle along the BB line when it is in operation.

[0020] Figure 8 It is a partial enlarged cross-sectional view of the CC line when the exhaust handle is in operation.

[0021] Fig. 9 This is a perspective view of the dust collecting attachment of Example 2 as viewed from the rear.

[0022] Fig.10 It is a rear view of the dust collection attachment of Example 2.

[0023] Fig.11 yes Fig.10 Enlarged cross-sectional view of line DD.

[0024] Fig.12 This is a perspective view of the dust collecting attachment of Example 3 as viewed from the rear.

[0025] Fig.13 It is a rear view of the dust collection attachment of Example 3.

[0026] Fig.14 yes Fig.13 Enlarged cross-sectional view of line EE.

[0027] Fig.15 This is a perspective view of the dust collecting attachment of Example 4 as viewed from the rear.

[0028] Fig.16 It is a rear view of the dust collection attachment of Example 4.

[0029] Fig.17 This is a front view of the dust collecting attachment of Example 4.

[0030] Fig.18 yes Fig.16 FF line enlarged cross-sectional view.

[0031] Fig.19 yes Fig.16 Enlarged cross-sectional view of line GG.

[0032] Fig. 20 This is a perspective view of the dust collecting attachment of Example 5 as viewed from the rear.

[0033] Fig.21 It is a rear view of the dust collection attachment of Example 5.

[0034] Fig. 22 yes Fig.21 Enlarged cross-sectional view of line HH.

[0035] Fig.23 This is a perspective view of the dust collecting attachment of Example 6 as viewed from the rear.

[0036] Fig.24 This is a perspective view of the dust collecting attachment of Example 6 as viewed from the front.

[0037] Fig.25 It is a rear view of the dust collection attachment of Example 6.

[0038] Fig.26 It is a front view of the dust collecting attachment of Example 6.

[0039] Fig. 27 yes Fig.25 Enlarged cross-sectional view of line II.

[0040] Fig.28 It is a rear view of the dust collection attachment of Example 6 to which a small-diameter ferrule is connected.

[0041] Fig.29 It is a rear view of the dust collecting attachment of Example 6 with a large diameter ferrule connected.

[0042] Fig.30 yes Fig.28 An enlarged cross-sectional view of the JJ line portion.

[0043] Fig.31 yes Fig.29 An enlarged cross-sectional view of the KK line portion.

[0044] Fig.32 In use Fig.29 LL line enlarged cross-sectional view.

[0045] Description of Reference Numerals

[0046] 1. 1A to 1E...dust collection attachment; 2...dust suction part; 3...main body; 5...suction port; 10...main body shell; 11...pad; 12...inner frame; 13. 51...exhaust handle; 16...dust collection passage; 17...handle; 20...suction space; 22...connecting port; 28...adsorption port; 30. 50...exhaust hole; 31...notch; 32...closing part; 33. 45...finger hook hanging piece; 34...guide pin; 35...guide cylinder; 37...coil spring; 41...hose; 46...bridging part; 60...handle; 65...abutment part; 80. 81...hoop; W...workpiece. DETAILED DESCRIPTION

[0047] In one embodiment of the present disclosure, the operating direction of the exhaust operating portion may be the same as the direction in which the main body portion is removed from the workpiece.

[0048] According to this configuration, the exhaust operation by the exhaust operation portion and the removal operation of the dust collecting attachment can be performed continuously and smoothly.

[0049] In one embodiment of the present disclosure, a finger grip portion may be provided on the exhaust operation portion.

[0050] According to this configuration, the exhaust operation by the exhaust operation portion can be easily performed.

[0051] In one embodiment of the present disclosure, a portion of the dust collection passage is formed on a handle portion that bulges out from a surface of the main body and extends linearly in a predetermined direction, and the exhaust operation portion is provided on the handle portion.

[0052] According to this configuration, the exhaust operation by the exhaust operation portion and the removal operation of the dust collecting attachment can be performed continuously by the hand holding the handle portion, without causing the trouble of operating with both hands.

[0053] In one embodiment of the present disclosure, a pair of exhaust operation parts may be provided on both sides of the center line of the handle part.

[0054] According to this configuration, the exhaust operation by the exhaust operation portion and the removal operation of the dust collecting attachment can be performed reliably and in a well-balanced manner.

[0055] In one embodiment of the present disclosure, the pair of exhaust operation parts may be integrally connected.

[0056] According to this structure, the exhaust holes are opened at the same time. Therefore, when the dust collecting attachment is removed, the dust collecting attachment does not rotate or tilt, and the operation can be performed with good balance.

[0057] In one embodiment of the present disclosure, the exhaust operation unit may be located at one location.

[0058] According to this configuration, even if the exhaust operation unit is provided, the number of components can be reduced and the manufacturing cost can be suppressed.

[0059] Alternatively, in one embodiment of the present disclosure, the exhaust operation portion is disposed on either side of the center line of the handle portion, and a finger landing portion is disposed on the handle portion at a side opposite to the exhaust operation portion across the handle portion.

[0060] According to this structure, even if the exhaust operation portion is located at one location, the operability during removal is not impaired by the pair of finger gripping portions.

[0061] In one embodiment of the present disclosure, an external hose may be connectable to the handle portion.

[0062] According to this configuration, even when the hose is connected, the hose can be stably supported by the handle portion, and the hose is less likely to interfere with the work.

[0063] Alternatively, in one embodiment of the present disclosure, when the exhaust hole is in a closed state, the exhaust operation portion, except for the finger landing portion, does not protrude relative to the outer shape of the handle portion.

[0064] According to this configuration, even if the exhaust operation portion is provided, the usability of the handle portion is not impaired, and interference with the electric tool is unlikely to occur.

[0065] In one embodiment of the present disclosure, a handle may be provided on the exhaust operation portion.

[0066] According to this configuration, the exhaust operation by the exhaust operation portion and the removal operation of the dust collecting attachment can be performed more easily using the handle.

[0067] Alternatively, in one embodiment of the present disclosure, the main body has: a main body shell provided with a dust collection passage and a suction space; and a pad portion provided on the main body shell, protruding toward the workpiece side to form a suction port, and made of an elastic material.

[0068] Furthermore, the main body case may be provided with a contact portion that protrudes toward the workpiece and contacts the workpiece when the suction port is in a suction state with the workpiece being suctioned.

[0069] According to this configuration, even if there are irregularities on the surface of the workpiece, the irregularities can be absorbed by the deformation of the pad portion, so that the main body case can be suppressed from floating and a decrease in the adsorption force can be prevented.

[0070] Alternatively, in one embodiment of the present disclosure, when the suction port is not suctioned toward the workpiece, the protruding surface of the abutment portion that protrudes toward the workpiece and the protruding surface of the pad portion that protrudes toward the workpiece are on the same plane, or are located closer to the main shell side than the protruding surface of the pad portion.

[0071] According to this configuration, even if the abutment portion is provided, close contact of the pad portion to the surface of the workpiece is not hindered.

[0072] Example 1

[0073] Hereinafter, embodiments of the present disclosure will be described based on the drawings.

[0074] Figure 1 This is a perspective view showing an example of a dust collection attachment as seen from the rear. Figure 2 This is a stereogram viewed from the front. Figure 3 It is the rear view.

[0075] The dust collecting attachment 1 includes a dust collecting unit 2, a main body 3, and a flexible hose 4. For convenience, the dust collecting unit 2 is described as the upper side, and the dust collecting unit 2 and the main body 3 are described as the front side with a suction port 5 and a suction port 28 described later.

[0076] The dust suction part 2 is cylindrical with its axis extending in the front-to-back direction. The suction port 5 is opened on the front surface of the dust suction part 2. A rubber cap 6 is installed on the rear surface of the dust suction part 2. The rubber cap 6 is formed with a through hole 7 located in the center and a plurality of notches 8, 8, ... extending in radial directions from the through hole 7.

[0077] The main body 3 includes a main body case 10 , a cushion portion 11 , an inner frame 12 , and an exhaust handle 13 .

[0078] When viewed from behind, the main body shell 10 is in a polygonal shape that expands in the left-right direction and is trapezoidal in the upper part and quadrilateral in the lower part. A connecting portion 14 connected to the dust collecting portion 2 is provided in the upper part of the main body shell 10 in the vertical direction. A belt-shaped skirt 15 protruding forward over the entire circumference is formed on the outer periphery of the main body shell 10, and the front is open.

[0079] Also like Figure 4 and Figure 5 As shown in the figure, a cylindrical dust collecting passage 16 is formed in the main body housing 10 along the up-down direction. The dust collecting passage 16 penetrates the connecting portion 14 at the center of the left-right direction of the main body housing 10, so that the upper end is opened at the lower inner surface of the dust collecting portion 2. The lower part of the dust collecting passage 16 is formed into a handle portion 17 that bulges backward from the upper part to the lower part of the main body housing 10 and opens at the lower end at the back of the main body housing 10. A concave portion 18 with a semicircular cross section is formed on the back of the main body housing 10 and extends continuously from the handle portion 17 to the lower side.

[0080] An inner rib 19 of the same shape as the skirt 15 is formed on the front surface of the main body housing 10. A suction space 20 is formed inside the inner rib 19. A plurality of connecting ribs 21, 21, ... protruding radially from the inner rib 19 are provided between the skirt 15 and the inner rib 19. A communication port 22 communicating with the suction space 20 is formed at the front upper end of the handle 17.

[0081] The pad 11 is formed of an elastic material, and its outer shape when viewed from the front is a shape similar to that of the main body shell 10 that is slightly larger. An opening 23 having the same shape as the inner rib 19 is formed in the center of the pad 11. The pad 11 is configured to cover between the skirt 15 and the inner rib 19 at the front surface of the main body shell 10. The pad 11 is formed into a shallow tapered shape with the front surface receding as it moves from the outer periphery toward the opening 23 side. A thin-walled portion 24 that is recessed rearward over the entire circumference is formed at the inner periphery of the opening 23.

[0082] The inner frame 12 is annularly fitted with the thin-walled portion 24 of the cushion portion 11 and surrounds the thin-walled portion 24. A pair of left and right screw fixing portions 25, 25 are formed on the inner circumference of the inner frame 12 and are respectively formed in the upper and lower parts. The screw fixing portions 25, 25 are respectively fixed to the front surface of the main body housing 10 by screws 27, 27, and a pair of left and right screw bosses 26, 26 are respectively erected in the upper and lower parts. The cushion portion 11 is thereby fixed, and a suction port 28 communicating with the central suction space 20 is formed on the front surface of the cushion portion 11 and the inner frame 12.

[0083] The main body housing 10 is provided with an exhaust hole 30 facing the suction space 20. The exhaust hole 30 is a rectangular shape extending in the vertical direction. Figure 5 and Figure 6 As shown, two exhaust holes 30 are arranged vertically between the left and right screw bosses 26 and 26 on the upper side.

[0084] The left and right exhaust holes 30, 30 are located on the left and right sides of the handle portion 17 on the back side. A pair of notch portions 31, 31 are formed on the left and right sides of the handle portion 17, extending from the side to the back side. Each notch portion 31 extends in the up-down direction in a quadrilateral region including the upper and lower exhaust holes 30, 30. The exhaust holes 30, 30 penetrate the main body housing 10 and communicate with the notch portion 31.

[0085] The exhaust handles 13, 13 are in the shape of a quadrilateral block that fits into the notch portions 31, 31 and spans from the side to the back of the handle portion 17. Figure 3 and Figure 5 As shown, the exhaust handles 13, 13 are arranged at left-right symmetrical positions with the center line L of the handle portion 17 as the center, and can move forward and backward in the notch portions 31, 31. Figure 6 As shown, a pair of upper and lower plug parts 32, 32 are protruding from the front surface of each exhaust handle 13. At the forward position abutting against the bottom surface of the notch part 31, the above-mentioned pair of upper and lower plug parts 32, 32 are embedded in the exhaust holes 30, 30 to close the exhaust holes 30, 30.

[0086] Each exhaust handle 13 is fitted with the notch 31 at the forward position and is received in the outer shape of the handle portion 17. Among them, between the side and back of each exhaust handle 13, a finger strap 33 is integrally formed along the up-down direction to protrude outwardly and backward.

[0087] The exhaust handle 13 is an example of an exhaust operation portion of the present disclosure. The finger strap 33 is an example of a finger strap portion of the present disclosure.

[0088] Each exhaust handle 13 is provided with a guide pin 34 protruding forward. For each guide pin 34, the rear portion is fixed to the exhaust handle 13 by insert molding between the plug parts 32, 32. A guide cylinder 35 protruding forward is formed between the upper and lower exhaust holes 30 of the main body housing 10. Each guide pin 34 penetrates the guide cylinder 35 from the rear. A circlip 36 is installed in front of the guide cylinder 35 and at the front end of each guide pin 34.

[0089] A coil spring 37 is externally mounted in front of each guide cylinder 35 and in front of each guide pin 34. The coil spring 37 is sandwiched between the circlip 36 and a receiving recess 38 formed on the inner periphery of the guide cylinder 35. Therefore, since the guide pin 34 is urged forward by the coil spring 37, the plugging parts 32, 32 of each exhaust handle 13 are located at the advanced position for closing the exhaust holes 30, 30 in the normal state.

[0090] The upper end of the flexible hose 4 is connected to the handle portion 17 of the main body case 10. The flexible hose 4 is fitted into the recess 18 of the main body case 10 and extends downward. A cylindrical joint 40 is attached to the lower end of the flexible hose 4.

[0091] When using the dust collecting attachment 1 configured as above, Figure 4 As shown, the operator connects an external hose 41 connected to a dust collector (not shown) to the joint 40 connected to the handle 17 of the flexible hose 4. The operator then holds the handle 17 of the main body 3, matches the dust suction unit 2 to the processing position, positions the main body 3 on the surface of the workpiece W in the vertical direction, and makes the suction port 28 close to the workpiece W. If the dust collector is operated in this state, suction force is generated at the flexible hose 4 and the dust collection passage 16 via the hose 41, and suction force is also generated at the suction port 5 of the dust suction unit 2 connected to the dust collection passage 16.

[0092] The suction space 20 of the main body 3 is connected to the dust collecting passage 16 via the connecting port 22, so that the air in the suction space 20 is sucked into the dust collecting passage 16 via the connecting port 22, thereby making the suction space 20 have a negative pressure. Therefore, the suction port 28 is adsorbed on the surface of the workpiece W, and the dust collecting attachment 1 is fixed to the surface of the workpiece W as it is.

[0093] The operator makes the end tool T of the electric tool (not shown) penetrate from the rear of the dust suction part 2 to perform a drilling operation, etc. In this way, the dust generated from the workpiece W is sucked into the dust suction part 2 from the suction port 5 together with the air, and is collected from the dust collection passage 16 via the flexible hose 4 and the hose 41 to the dust collector.

[0094] Furthermore, when the dust collecting attachment 1 is removed from the workpiece W for the purpose of changing the processing position, the operator places his fingers on the finger-engaging pieces 33, 33 of the left and right exhaust handles 13, 13 of the handle portion 17 from the front side and pulls it directly backward. Figure 7 and Figure 8As shown, the exhaust handles 13, 13 overcome the force of the coil springs 37, 37 and retreat, opening the left and right notches 31, 31 to open the exhaust holes 30, 30 respectively. In this way, the outside air flows into the suction space 20 from each exhaust hole 30 to reduce the adsorption force, so that the dust collection attachment 1 can be removed backward from the workpiece W as it is. This removal operation can be performed continuously with the operation of pulling the exhaust handles 13, 13 backward via the finger straps 33, 33.

[0095] When the dust collecting attachment 1 is removed and the exhaust handles 13 are released from being pulled, the exhaust handles 13 are moved to the advanced position by the biasing force of the coil springs 37. Therefore, the exhaust holes 30 are closed again by the plugs 32.

[0096] The dust collecting attachment 1 of the above-mentioned embodiment 1 comprises: a dust collecting part 2 having a suction port 5 through which the end tool T can pass; and a main body 3 having a dust collecting passage 16 which is connected to the dust collecting part 2 and can be connected to an external hose 41. The main body 3 is provided with a suction space 20 which is connected to the dust collecting passage 16 and has a suction port 28 for adsorbing the workpiece W, an exhaust hole 30 which opens the suction space 20 to the outside, and an exhaust handle 13 which closes the exhaust hole 30 under normal conditions and opens the exhaust hole 30 by a predetermined operation.

[0097] Then, the exhaust handle 13 is operated together with the action of removing the main body 3 from the workpiece W to open the exhaust hole 30 .

[0098] According to this structure, the exhaust by the exhaust handle 13 and the removal of the dust collecting attachment 1 are not separate independent operations. Therefore, the dust collecting attachment 1 can be removed by a simple operation, and it is also possible to effectively prevent accidental drop during removal.

[0099] The operating direction of the exhaust handle 13 is the same as the direction in which the main body 3 is removed from the workpiece W.

[0100] Therefore, the exhaust operation using the exhaust handle 13 and the removal of the dust collecting attachment 1 can be performed continuously and smoothly.

[0101] The exhaust handle 13 is provided with a finger grip 33 .

[0102] Therefore, the exhaust operation based on the exhaust handle 13 can be easily performed.

[0103] A portion of the dust collection passage 16 is formed as a handle portion 17 that bulges out from the surface of the main body 3 and extends linearly in the vertical direction. The exhaust handle 13 is provided on the handle portion 17 .

[0104] Therefore, the exhaust operation by the exhaust handle 13 and the removal operation of the dust collecting attachment 1 can be continuously performed by the hand holding the handle portion 17, without causing the trouble of operating with both hands.

[0105] A pair of exhaust handles 13 , 13 are provided on the left and right sides (here, line-symmetrical positions) of the center line L of the handle portion 17 .

[0106] Therefore, the exhaust operation by the exhaust handle 13 and the removal operation of the dust collecting attachment 1 can be performed reliably with good balance.

[0107] The external hose 41 can be connected to the handle portion 17 via the flexible hose 4 .

[0108] Therefore, even if the hose 41 is connected, it can be stably supported by the handle portion 17, and the hose 41 does not hinder the work.

[0109] When the exhaust hole 30 is closed, the exhaust handle 13 does not protrude from the outer shape of the handle portion 17 except for the finger strap 33 .

[0110] Therefore, even if the exhaust handle 13 is provided, the usability of the handle portion 17 is not impaired, and interference with the electric tool is unlikely to occur.

[0111] In the above-mentioned first embodiment, the following changes can be made.

[0112] The blocking structure of the exhaust hole based on the exhaust handle is not limited to the above example. For example, the guide pins provided on each exhaust handle on the left and right may be two, one above the other, instead of one, and a plug portion may be formed between the guide pins to block one exhaust hole provided on the main body shell. The exhaust handle is not limited to guiding by the guide pin, and a plate-shaped guide portion may be provided on the exhaust handle. The guide portion may also be formed integrally on the exhaust handle.

[0113] The shapes of the vent hole and the plug portion can also be changed appropriately. The vent hole and the plug portion may be square, circular, etc. instead of rectangular.

[0114] The shape of the exhaust operation part is not limited to the quadrilateral block-shaped exhaust handle in the above example. The exhaust operation part may also be in a semicircular block shape or a rod shape.

[0115] The finger landing part may not be formed with the same protrusion amount in the vertical direction as the finger landing piece in the above example. For example, the finger landing part may be formed into a semicircular shape when viewed from behind, and the protrusion amount in the center in the vertical direction may be larger.

[0116] The finger grip portion may not be a structure protruding from the exhaust operation portion like the finger grip piece in the above example. For example, the finger grip portion may be a recessed portion formed in the exhaust operation portion.

[0117] Example 2

[0118] Hereinafter, other embodiments of the present disclosure will be described, wherein the same reference numerals are given to the same components as those of the first embodiment, and repeated descriptions are omitted, and the description will be mainly based on the different components.

[0119] Fig. 9 1 is a perspective view showing an example of the dust collecting attachment 1A of the second embodiment, as viewed from the rear. Fig.10 is the rear view, Fig.11 yes Fig.10 Enlarged cross-sectional view of line DD.

[0120] The dust collecting attachment 1A is different from the first embodiment in that the exhaust hole 30 is not provided as a pair on the left and right but is provided only on the right side. Therefore, in the handle portion 17, the notch portion 31 and the exhaust handle 13 are provided only on the right side. A similar finger strap 45 is formed on the left side of the handle portion 17 at a symmetrical position symmetrical to the finger strap 33 of the exhaust handle 13 on the right side with the plane passing through the center line L in the up-down and front-back directions as the center. The other structures are the same as those of the first embodiment.

[0121] Therefore, when removing the dust collection attachment 1A from the workpiece W for the purpose of changing the processing position, the operator places his fingers on the finger-engaging piece 33 of the exhaust handle 13 on the right side of the handle 17 and the finger-engaging piece 45 of the handle 17 from the front side and pulls it directly backward. Fig.11 As shown by the double-dashed line in the middle, the right exhaust handle 13 overcomes the force of the coil spring 37 and retreats, opening the notch portion 31 on the right side to open the exhaust holes 30, 30 respectively. In this way, the outside air flows into the suction space 20 from each exhaust hole 30 to reduce the adsorption force, so that the dust collection attachment 1A can be removed backward from the workpiece W as it is. This removal can be performed continuously with the operation of pulling the exhaust handle 13 backward via the finger strap 33.

[0122] In the dust collecting attachment 1A of the second embodiment, the exhaust by the exhaust handle 13 and the removal of the dust collecting attachment 1A are not separate operations. Therefore, the dust collecting attachment 1A can be removed by a simple operation, and accidental dropping during removal can also be effectively prevented.

[0123] In particular, since the exhaust handle 13 is provided at one location, the number of parts can be reduced compared to the first embodiment, thereby suppressing the manufacturing cost.

[0124] The exhaust handle 13 is provided on the right side of the center line L of the handle portion 17 , and a finger strap 45 is provided on the handle portion 17 at the opposite side of the exhaust handle 13 across the handle portion 17 .

[0125] Therefore, even if the exhaust handle 13 is at one location, the left and right finger straps 33 and 45 will not impair the operability during removal.

[0126] In the above-mentioned embodiment 2, in addition to being applicable through changes to the above-mentioned embodiment 1, the following changes can also be made.

[0127] Alternatively, the exhaust hole and the exhaust handle may be disposed on the left side instead of the right side of the handle portion.

[0128] The shape of the finger rest portion provided on the handle portion can also be changed appropriately. The finger rest portion may also be a shape different from the finger rest portion of the exhaust handle, for example, it may also be a recessed portion.

[0129] Example 3

[0130] Fig.12 1 is a perspective view showing an example of the dust collecting attachment 1B of the third embodiment, as viewed from the rear. Fig.13 is the rear view, Fig.14 yes Fig.13 Enlarged cross-sectional view of line EE.

[0131] The dust collecting attachment 1B is different from the first embodiment in that the left and right exhaust handles 13, 13 are connected by a bridge portion 46. The bridge portion 46 is formed along the upper surface of the handle portion 17 in an arc shape in a plan view with the same upper and lower width as the exhaust handle 13. The bridge portion 46 is integrally formed with the left and right exhaust handles 13, 13.

[0132] Furthermore, when removing the dust collecting attachment 1B from the workpiece W for the purpose of changing the processing position, the operator places his fingers on the finger-engaging pieces 33, 33 of the left and right exhaust handles 13, 13 of the handle portion 17 from the front side and pulls it directly backward. Fig.14 As shown by the double-dashed lines, the exhaust handles 13, 13 overcome the force of the coil springs 37, 37 and retreat, opening the left and right notches 31, 31 to open the exhaust holes 30, 30 respectively. In this way, the outside air flows into the suction space 20 from each exhaust hole 30 to reduce the adsorption force, so that the dust collection attachment 1B can be removed backward from the workpiece W as it is. This removal can be performed continuously with the operation of pulling the exhaust handles 13, 13 backward via the finger straps 33, 33.

[0133] In the dust collecting attachment 1B of the third embodiment, the exhaust by the exhaust handle 13 and the removal of the dust collecting attachment 1B are not separate operations. Therefore, the dust collecting attachment 1B can be removed by a simple operation, and can also effectively prevent accidental dropping during removal.

[0134] In particular, the exhaust handles 13 and 13 are integrally connected by the bridge portion 46, so that the exhaust holes 30 and 30 are always opened at the same time. Therefore, when the dust collecting attachment 1B is removed, the dust collecting attachment 1B does not rotate or tilt, and can be operated with good balance.

[0135] In the above-mentioned embodiment 3, in addition to being applicable to the changes of the above-mentioned embodiment 1, the following changes can also be made.

[0136] The shape of the bridge portion can be changed appropriately. The vertical width of the bridge portion can be smaller or larger than the exhaust handle, for example.

[0137] The bridge portion may be formed of a member different from the exhaust handle.

[0138] Example 4

[0139] Fig.15 1 is a perspective view showing an example of a dust collecting attachment 1C according to Embodiment 4, as viewed from the rear. Fig.16 is the rear view, Fig.17 is the main view, Fig.18 yes Fig.16 FF line enlarged cross-sectional view.

[0140] In the dust collecting attachment 1C, an exhaust hole 50 having a longitudinally long rectangular shape in the main view is formed not on the left and right sides of the handle portion 17, but on the left side of the handle portion 17. An exhaust handle 51 is provided in front of the exhaust hole 50. The exhaust handle 51 is a plate body having a longitudinally long rectangular shape in the main view that is one circle larger than the exhaust hole 50. On the back side of the exhaust handle 51, a flat plate-shaped handle portion 52 is formed in the up-down direction, penetrating the exhaust hole 50 and protruding rearward.

[0141] Guide ribs 53, 53, ... extending along the outer periphery of the exhaust handle 51 are provided on the front surface of the main body housing 10 and on the upper and lower sides and the left side of the exhaust handle 51. The exhaust handle 51 can be slid to the left ( Fig.18 The position shown by the solid line in the middle) and the right sliding position ( Fig.18 At the left sliding position, the handle 52 abuts against the left end of the exhaust hole 50.

[0142] A leaf spring 54 is provided on the front surface of the main body housing 10 and on the right side of the exhaust handle 51. The leaf spring 54 is supported at upper and lower ends by upper and lower support ribs 55, 55, ... protruding from the front surface of the main body housing 10 and bulges toward the exhaust handle 51. The leaf spring 54 abuts against the exhaust handle 51 and urges the exhaust handle 51 to slide to the left in a normal state.

[0143] Also like Fig.19As shown in the figure, a pressure plate 56 is provided on the front side of the exhaust handle 51 and the leaf spring 54. The pressure plate 56 is in a shape straddling the right side of the exhaust handle 51 and the central part of the leaf spring 54 and abutting against both. A pair of ring parts 57, 57 are integrally formed above and below the pressure plate 56. The ring parts 57, 57 are penetrated by the upper and lower screw bosses 26 of the threaded fixing part 25 used to install the inner frame 12. The screw boss 26 on the lower side is a structure added on the basis of Example 1. If the upper and lower threaded fixing parts 25 are fixed respectively by screws 27, the threaded fixing parts 25 abut against the ring parts 57 from the front respectively, and the movement of the pressure plate 56 to the front is restricted. Therefore, the movement of the exhaust handle 51 and the leaf spring 54 in the front-to-back direction between the main body shell 10 and the pressure plate 56 is restricted.

[0144] When removing the dust collecting attachment 1C adsorbed on the workpiece from the workpiece, the operator holds the handle 17 together with the left handle 52. Fig.18 As shown by the double-dotted line, the exhaust handle 51 and the handle portion 52 overcome the force of the leaf spring 54 and slide to the right sliding position, so that the exhaust hole 50 is opened. In this way, the outside air flows into the suction space 20 from the exhaust hole 50 to reduce the adsorption force, so that the dust collection attachment 1C can be removed backward from the workpiece W as it is. This removal can be performed simultaneously with the operation of holding the handle portion 17 and pulling it backward.

[0145] In the dust collecting attachment 1C of the fourth embodiment, the handle 17 is also held together with the handle 52, and the operation is performed in the direction of removing the main body 3 from the workpiece W. That is, the exhaust by the exhaust handle 51 and the removal of the dust collecting attachment 1C are not separate independent operations. Therefore, the dust collecting attachment 1C can be removed by a simple operation, and it is also possible to effectively prevent accidental dropping during removal.

[0146] The dust collecting attachment 1C of the fourth embodiment described above can be modified as follows.

[0147] Alternatively, the exhaust hole and the exhaust handle may be disposed on the right side instead of the left side of the handle portion.

[0148] The shape of the vent and the vent handle is not limited to a quadrilateral shape, and may be other shapes such as a square. As long as the vent can be blocked, the shape of the vent handle may be different from the vent.

[0149] The shape of the handle of the exhaust handle can also be changed appropriately. The handle may not be flat, but may be curved outward in the left-right direction, for example.

[0150] The elastic member that urges the exhaust handle toward the closed position is not limited to the leaf spring, and other elastic members such as a coil spring may be used.

[0151] The shape and mounting structure of the pressing plate can also be changed as appropriate. The pressing plate can also be screwed directly to the main body housing without using a screw boss.

[0152] Can omit pressing plate. In this case, also can be, make the front end of guide rib, support rib bend in L shape and limit the front-back movement of exhaust operation parts such as exhaust handle.

[0153] Example 5

[0154] Fig. 20 1 is a perspective view showing an example of a dust collecting attachment 1D according to Embodiment 5, as viewed from the rear. Fig.21 is the rear view, Fig. 22 yes Fig.21 Enlarged cross-sectional view of line HH.

[0155] The dust collecting attachment 1D is different from the first embodiment in that a handle 60 is provided at the left and right exhaust handles 13, 13 instead of the finger straps to connect the two. In a plan view, the handle 60 is a quadrilateral shape, and the front ends of the left and right arms 61, 61 are integrally connected to the exhaust handles 13, 13 to form a ring shape. The exhaust handles 13, 13 are connected by a bridge 46.

[0156] In addition, here, the plug-closing portion is not provided on the exhaust handle 13, and a tapered portion 62 whose diameter increases as it moves toward the rear is provided in the middle of the guide pin 34. At the advanced position of the exhaust handles 13, 13, the large diameter portion of the rear end of the tapered portion 62, 62 fits with the circular exhaust holes 30, 30 to close the exhaust holes 30, 30.

[0157] Therefore, when removing the dust collecting attachment 1D from the workpiece for the purpose of changing the processing position, the operator holds the handle 60 and pulls it directly backward. Fig. 22 As shown by the double-dotted lines, the exhaust handles 13, 13 and the tapered portions 62, 62 overcome the urging force of the coil springs 37, 37 and retreat, opening the left and right notch portions 31, 31 to open the exhaust holes 30, 30, respectively. In this way, the outside air flows into the suction space 20 from each exhaust hole 30 to reduce the adsorption force, so that the dust collection attachment 1D can be removed backward from the workpiece W as it is. This removal can be performed continuously with the operation of pulling the handle 60 backward.

[0158] In the dust collecting attachment 1D of the fifth embodiment, the exhaust by the exhaust handle 13 and the removal of the dust collecting attachment 1D are not separate operations. Therefore, the dust collecting attachment 1D can be removed by a simple operation, and accidental dropping during removal can also be effectively prevented.

[0159] In particular, since the exhaust handle 13 is provided with the handle 60 , the exhaust operation using the exhaust handle 13 and the removal operation of the dust collecting attachment 1D can be performed more easily using the handle 60 .

[0160] In the above-mentioned embodiment 5, in addition to being applicable by changing the above-mentioned embodiment 1, the following changes can also be made.

[0161] The shape of the handle is not limited to the above examples. The handle may also be in other shapes such as a semicircle when viewed from above. The handle may also be in an L-shape or an inverted T-shape when viewed from above and connected to the bridge portion. The bridge portion may be omitted if it does not affect the setting of the handle.

[0162] Closing of the exhaust hole is not limited to the tapered portion provided on the guide pin. As in Example 1, a plugging portion may be provided on the exhaust handle. Conversely, in Examples 1 to 3, a tapered portion may be provided on the guide pin instead of the plugging portion of the exhaust handle to close the circular exhaust hole.

[0163] Example 6

[0164] Fig.23 1 is a perspective view showing an example of a dust collecting attachment 1E of Example 6 as viewed from the rear. Fig.24 This is a stereoscopic view viewed from the front. Fig.25 This is the rear view of the dust collection attachment 1E. Fig.26 It is the main view.

[0165] Similar to the second embodiment, in the dust collecting attachment 1E, the upper and lower exhaust holes 30, 30 are not a pair of left and right but are only provided on the right side. When viewed from the rear, the main body shell 10 is circular. Therefore, when viewed from the front, the pad 11 and the inner frame 12 are also circular, but the upper ends of the pad 11 and the inner frame 12 are chamfered to form a straight line in the left-right direction.

[0166] Four abutment portions 65, 65, ... protruding forward (toward the workpiece W side) are formed on the front surface of the inner frame 12 and at the top, bottom, left and right positions. The upper abutment portion 65 extends in the left-right direction in accordance with the shape of the upper end of the inner frame 12. The other three abutment portions 65, 65, ... on the lower side and left and right extend in an arc shape along the circumferential direction of the inner frame 12.

[0167] Each abutting portion 65 is formed before being adsorbed onto the workpiece W. Fig. 27 As shown, the front surface is formed at a protruding height slightly to the rear side than the front end surface of the pad portion 11. In this state, the tapered portion of the pad portion 11 is in a position that does not abut against the skirt portion 15 of the main body housing 10. The front surface of the abutment portion 65 is an example of a protruding surface of the abutment portion of the present disclosure toward the workpiece side. The front end surface of the pad portion 11 is an example of a protruding surface of the pad portion of the present disclosure toward the workpiece side.

[0168] On the other hand, the joint 40 connected to the flexible hose 4 has three diameters: a large diameter portion 66 with the largest diameter at the top, a medium diameter portion 67 in the middle, and a small diameter portion 68 with the smallest diameter at the bottom. Grooves are formed in the circumferential direction on the outer periphery of the medium diameter portion 67 by thinning. A plurality of annular outer ribs 69, 69, ... are formed in the axial direction on the outer periphery of the small diameter portion 68.

[0169] therefore, Fig.28 The small diameter ferrule 80 shown and Fig.29 The large diameter ferrules 81 shown are all capable of being connected to the connector 40 .

[0170] like Fig.30 As shown, the small-diameter ferrule 80 can be connected by attaching the end thereof to the small-diameter portion 68. A plurality of annular inner ribs 82, 82, ... are formed along the axial direction on the inner peripheral surface of the ferrule 80. In the connected state to the small-diameter portion 68, the inner ribs 82 are engaged between the outer ribs 69, 69 to produce a disengagement prevention effect.

[0171] like Fig.31 As shown, the large-diameter ferrule 81 can be connected by having its end externally mounted in front of the large-diameter portion 66 and pressed into the medium-diameter portion 67 .

[0172] Therefore, regardless of whether the end of the external hose 41 is the ferrule 80 or the ferrule 81 , the operator can handle it with one connector 40 , and does not need to use the connector 40 in a differentiated manner to match the ferrules 80 and 81 .

[0173] Furthermore, when the operator performs the operation by adsorbing the main body 3 onto the surface of the workpiece W, Fig.32 As shown, each abutment portion 65 of the inner frame 12 limits further advancement of the main body housing 10 by abutting the front surface against the surface of the workpiece W. Therefore, the pad portion 11 is not crushed between (the surface of the workpiece W) and the skirt portion 15 of the main body housing 10, and the non-contact state between the pad portion 11 and the skirt portion 15 is maintained.

[0174] If the pad 11 is in contact with the skirt 15, if there is a protrusion on the surface of the workpiece W, the skirt 15 may ride on the protrusion together with the pad 11, causing the gap between the pad 11 and the surface of the workpiece W to expand, thereby reducing the adsorption force.

[0175] However, in this example, the front position of the main body housing 10 is limited by the abutment portion 65 to maintain the non-contact state between the pad portion 11 and the skirt portion 15. Therefore, even if there is a convex shape on the surface of the workpiece W, only the pad portion 11 is deformed, preventing the main body housing 10 from floating without reducing the adsorption force.

[0176] On the other hand, when removing the dust collection attachment 1E from the workpiece W for the purpose of changing the processing position, the operator places his fingers on the finger-engaging piece 33 of the exhaust handle 13 on the right side of the handle 17 and the finger-engaging piece 33A on the left side of the handle 17 from the front side and pulls them directly backward. Fig.32 As shown by the double-dashed line in the figure, the right exhaust handle 13 overcomes the force of the coil spring 37 and retreats, opening the notch 31 on the right side so that the exhaust holes 30, 30 are opened respectively. In this way, the outside air flows into the suction space 20 from each exhaust hole 30 to reduce the adsorption force, so that the dust collection attachment 1E can be removed backward from the workpiece W as it is. This removal can be performed continuously with the operation of pulling the exhaust handle 13 backward via the finger strap 33.

[0177] In the dust collecting attachment 1E of the sixth embodiment, the exhaust by the exhaust handle 13 and the removal of the dust collecting attachment 1E are not separate operations. Therefore, the dust collecting attachment 1E can be removed by a simple operation, and accidental dropping during removal can also be effectively prevented.

[0178] In particular, the main body 3 includes: a main body shell 10, which is provided with a dust collection passage 16, a suction space 20, an exhaust hole 30, and an exhaust handle 13; an annular inner frame 12, which is arranged on the front side of the main body shell 10; and a pad 11, which surrounds the outer periphery of the inner frame 12 and protrudes forward to form a suction port 28, and is made of elastic material.

[0179] The inner frame 12 is provided with a contact portion 65 that protrudes forward from the main body case 10 and contacts the workpiece W when the suction port 28 is sucked toward the workpiece W.

[0180] Therefore, even if there are irregularities on the surface of the workpiece W, the cushion portion 11 can be deformed to absorb the irregularities, thereby suppressing the main body housing 10 from floating and preventing a decrease in the adsorption force.

[0181] In a state where the suction port 28 is not suctioned to the workpiece W, the front surface of the contact portion 65 is located closer to the main body housing 10 than the front end surface of the pad portion 11 .

[0182] Therefore, even if the abutment portion 65 is provided, close contact with the surface of the workpiece W by the pad portion 11 is not hindered.

[0183] In the above-mentioned embodiment 6, in addition to being applicable by changing the above-mentioned embodiment 2, the following changes can also be made.

[0184] The number and shape of the contact portions can be changed appropriately. For example, the contact portions may extend longer in the circumferential direction of the inner frame than in the above example, or, conversely, may extend shorter.

[0185] In the above example, the front surface of the abutment portion is located slightly rearward of the front end surface of the pad portion before adsorption, but it may also be that the front surface of the abutment portion is located on the same plane (here a plane defined by the up, down, left, and right directions) as the front end surface of the pad portion before adsorption.

[0186] The contact portion is not limited to application to a dust collecting attachment including an exhaust hole and an exhaust operation portion as in the above-mentioned example.

[0187] That is, the abutment portion becomes an application object as long as it is the following dust collecting accessory, and the above-mentioned dust collecting accessory includes: a dust suction portion, which has a suction port through which the end tool can pass; and a main body portion, which has a dust collecting passage that is connected to the dust suction portion and can be connected to an external hose, and has a suction space that is connected to the dust collecting passage and has a suction port for adsorbing the workpiece, and the main body portion includes: a main body shell, which is provided with a dust collecting passage and a suction space; and a pad portion, which is arranged on the main body shell, protrudes from the workpiece side to form the suction port, and is made of elastic material.

[0188] In this case, the contact portion is not limited to being provided in the inner frame as described above, and may be provided in a main body casing other than the inner frame, as long as it protrudes toward the workpiece and contacts the workpiece when the suction port is sucked toward the workpiece.

[0189] The connector can also be appropriately changed to match the shape of the ferrule of the hose on the dust collector side. For example, the number of stages with different diameters can be increased to be able to connect with more than three types of ferrules. The connection between the connector and the ferrule is not limited to the connection based on the engagement or press-fitting of the ribs. For example, as a connection structure, a screw connection or a bayonet connection can also be adopted.

[0190] The following changes can be made in common with each embodiment.

[0191] The shapes of the dust suction part and the main body can be changed appropriately. For example, when viewed from behind, the main body does not adopt polygonal or circular shapes, but can adopt other shapes such as square, rectangle, triangle, and oval.

[0192] The shape of the suction port can also be changed appropriately.

[0193] The shapes and mounting structures of the cushion portion and the inner frame can also be changed appropriately.

[0194] Flexible hose also can be omitted. In this case, the outside hose is directly connected to the lower end of the handle portion.

[0195] In each embodiment, the dust collecting attachment is used as an example to adsorb the workpiece in the vertical direction, but the dust collecting attachment of the present disclosure can also be used when the workpiece is inclined or in the horizontal direction.

Claims

1. A dust collection accessory, comprising: A dust suction part having a suction port through which a distal tool can pass; and a main body having a dust collection passage communicating with the dust suction part and to which an external hose can be connected, The main body is provided with a suction space connected to the dust collecting passage and having a suction port for sucking the workpiece, an exhaust hole for opening the suction space to the outside, and an exhaust operation part for closing the exhaust hole in normal state and opening the exhaust hole by a predetermined operation. The dust collection attachment is characterized in that The exhaust operation portion is operated to open the exhaust hole together with the operation of removing the main body portion from the workpiece.

2. The dust collection accessory according to claim 1, characterized in that: The operating direction of the exhaust operation portion is the same as the direction in which the main body portion is removed from the workpiece.

3. The dust collection accessory according to claim 1 or 2, characterized in that: The exhaust operation portion is provided with a finger engaging portion.

4. The dust collection accessory according to claim 3, characterized in that: A portion of the dust collection passage is formed in a handle portion that bulges out from the surface of the main body and extends linearly in a predetermined direction, and the exhaust operation portion is provided on the handle portion.

5. The dust collection accessory according to claim 4, characterized in that: A pair of the exhaust operation parts are provided on both sides of the center line of the handle part.

6. The dust collection accessory according to claim 5, characterized in that: The pair of exhaust operation parts are integrally connected.

7. The dust collection accessory according to claim 4, characterized in that: The exhaust operation part is in one location.

8. The dust collection accessory according to claim 7, characterized in that: The exhaust operation part is arranged on either side of the center line of the handle part, and the finger engaging part is arranged on the handle part at a side opposite to the exhaust operation part across the handle part.

9. The dust collecting accessory according to any one of claims 4 to 8, characterized in that: The external hose can be connected to the handle.

10. The dust collecting accessory according to any one of claims 4 to 9, characterized in that: When the exhaust hole is in a closed state, the exhaust operation portion, except for the finger landing portion, does not protrude relative to the outer shape of the handle portion.

11. The dust collection accessory according to claim 1, characterized in that: The exhaust operation portion is provided with a handle.

12. A dust collection accessory, comprising: A dust suction part having a suction port through which the end tool can pass; and a main body having a dust collection passage connected to the dust suction part and to which an external hose can be connected, and a suction space connected to the dust collection passage and having a suction port for adsorbing the workpiece, The main body has: a main body shell, which is provided with the dust collection passage and the suction space; and a pad, which is provided on the main body shell, protrudes toward the workpiece side to form the suction port, and is made of an elastic material. The dust collection attachment is characterized in that The main body housing is provided with a contact portion that protrudes toward the workpiece and contacts the workpiece in a suction state in which the suction port suctions the workpiece.

13. The dust collection accessory according to claim 12, characterized in that: When the suction port is not suctioned toward the workpiece, the protruding surface of the abutment portion protruding toward the workpiece and the protruding surface of the pad portion protruding toward the workpiece are on the same plane, or are located closer to the main shell side than the protruding surface of the pad portion.

14. The dust collection accessory according to claim 1, characterized in that: The main body has: a main body shell, which is provided with the dust collection passage, the suction space, the exhaust hole, and the exhaust operation part; and a pad, which is provided on the main body shell and protrudes toward the workpiece side to form the suction port, and is made of elastic material. The main body housing is provided with a contact portion that protrudes toward the workpiece and contacts the workpiece in a suction state in which the suction port suctions the workpiece.

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