JP6886819B2 - Dust collector for power tools and power tools - Google Patents

Description

The present invention relates to a dust collector for a power tool attached to an electric tool such as an electric drill or a hammer drill, and an electric tool equipped with the dust collector.

Electric tools such as electric drills and hammer drills may be equipped with a dust collector that collects and collects dust generated from a work material during drilling work or the like. As the dust collector for power tools, the one disclosed in Patent Document 1 is known. Here, a ventilation member (slide pipe) that protrudes forward and can slide in the front-rear direction and has a suction port at the front end is provided at the front end of the housing mounted on the housing of the power tool, and the suction port is provided in the housing. The structure is such that the air sucked in from the air passes through the ventilation member to form an air passage leading to the discharge port formed in the housing, and a filter is housed in the air passage to capture the dust in the air with the filter. There is. Further, the ventilation member can be slidable by fitting the guide rail provided on one side surface to the fitting portion provided on the housing and fitting the convex portion provided on the housing to the concave portion provided on the other side surface. By adjusting the position of the adjusting member that engages with the rack on the side surface of the ventilation member, the retracted position of the ventilation member can be changed.

Japanese Patent No. 5707293

In the conventional dust collector for electric tools, since the fitting portion and the convex portion (guide portion), the guide rail and the concave portion (guided portion) are provided on the left and right sides of the ventilation member (slide portion), the left and right directions are provided. The size of the is large, and the operability in a narrow place is deteriorated. Further, when the vehicle is placed horizontally, the adjusting member or the guide rail exposed on the side surface may come into contact with the floor surface or the like and be damaged. Further, since the guide portion and the guided portion are arranged at positions separated from each other on the left and right sides of the slide portion, it is difficult to obtain accuracy in the left-right direction, and the slideability may be deteriorated due to twisting or backlash.

Therefore, an object of the present invention is to provide a dust collector for a power tool and a power tool that can accurately guide the slide portion in a compact structure with less risk of damage.

In order to achieve the above object, the invention according to claim 1 comprises a main body case that can be attached to a power tool, a tubular slide portion that is provided on the main body case and has a nozzle provided with a suction port at the front end. A dust collector for power tools that includes a dust collector that stores dust sucked from a nozzle.
The slide portion is provided with a guided portion that is slidably supported in the front-rear direction by a guide portion provided on the main body case, and the guide portion and the guided portion are on the half side of the cross-sectional line passing through the center of the slide portion. together is disposed only in the region,
The guided portion is a rail-shaped protrusion protruding from the slide portion, and the protrusion is formed with guided surfaces in four directions when viewed in a cross section orthogonal to the slide direction.
The slide part is placed on the main body case so that it is located directly under the tip tool of the power tool with the main body case attached to the power tool, and the protrusion is placed at a position that shifts from directly below the slide part to either the left or right. The guide portion and the protrusion are arranged only in the area on either the left or right side of the center of the slide portion .
The invention according to claim 2 is characterized in that, in the configuration of claim 1, the guide portion is made of metal.
The invention according to claim 3 is characterized in that, in the configuration of claim 1 or 2 , the slide portion has a telescope structure that includes a plurality of cylinders and can be expanded and contracted.
In order to achieve the above object, the invention according to claim 4 comprises a main body case that can be attached to a power tool, a tubular slide portion that is provided on the main body case and has a nozzle provided with a suction port at the front end. A dust collector for power tools that includes a dust collector that stores dust sucked from a nozzle.
The slide portion is provided with a guided portion that is slidably supported in the front-rear direction by a guide portion provided on the main body case, and the guide portion and the guided portion are on the half side of the cross-sectional line passing through the center of the slide portion. As well as being placed only within the area
The guided portion is a rail-shaped protrusion protruding from the slide portion.
The guide part is made of metal
The slide part is placed on the main body case so that it is located directly under the tip tool of the power tool with the main body case attached to the power tool, and the protrusion is placed at a position that shifts from directly below the slide part to either the left or right. The guide portion and the protrusion are arranged only in the area on either the left or right side of the center of the slide portion .
According to the fifth aspect of the present invention, in any of the configurations of the first to fourth aspects, the main body case is provided with a spiral spring for urging the slide portion to protrude forward, and the spiral spring is a guide portion and a guided portion. It is characterized in that it is connected to the slide portion through the portion.
In order to achieve the above object, the invention according to claim 6 is a power tool, wherein the power tool dust collector according to any one of claims 1 to 5 is attached. ..

According to the invention described in claim 1 and 4, 6, it is possible to guide the slide portion only guided portion that is only in the region of half the side of the sliding portion, the operation in a narrow place so guide structure is compact The sex is also good. In addition, since the guided portion is less likely to be exposed, the risk of damage is reduced. Further, since the guided portion is guided in a narrow area, twisting and backlash are less likely to occur, and the sliding portion can be guided accurately while maintaining slidability.
In addition, by arranging the guide portion and the protrusion only in the area on one of the left and right sides of the slide portion, the guide portion and the protrusion are not exposed from the slide portion when viewed from the side, and are particularly less susceptible to damage from the side. Become.
According to the second aspect of the present invention, in addition to the above effects, the strength can be ensured by making the guide portion made of metal.
According to the third aspect of the present invention, in addition to the above effect, the slide portion has a telescope structure, so that the slide portion can be slid back and forth more smoothly.
According to the fifth aspect of the present invention, in addition to the above effect, since the spiral spring is connected to the slide portion through between the guide portion and the guided portion, the spiral spring can be moved to the slide portion in a space-saving manner. Can be connected to.

It is a perspective view from the front of the dust collection system. It is a side view of the dust collection system. It is a top view of the dust collection system. It is a front view of the dust collection system. It is a perspective view of a hammer drill. FIG. 2 is a partial cross-sectional view taken along the line AA of FIG. FIG. 3 is a partial cross-sectional view taken along the line BB of FIG. It is a partial cross-sectional view of the joint part of the dust collector for a power tool. FIG. 8 is a cross-sectional view taken along the line CC of FIG. It is a perspective view from the front of the dust collector for a power tool. It is a perspective view from the rear of the dust collector for a power tool. It is a perspective view from the front of the main body case. It is a perspective view from the rear of the main body case. It is a perspective view of a guide metal fitting. In the explanatory view of the dust box, (A) shows a perspective view from the front, and (B) shows a perspective view from the rear. In the explanatory view of the dust box, (A) shows the back surface, and (B) shows the DD line cross section. It is a central vertical sectional view of a dust box. It is an explanatory view which shows the air flow in a dust box through the box body, (A) shows the perspective from the left front, and (B) shows the perspective from the right front. It is a side view which shows the state which the slide part retracted. It is a side view of the dust collection system which shows the modification example of the slide part. It is a perspective view of the dust collection system which shows the modification example of the slide part. It is a side view of the dust collection system which shows the other modification example of a slide part. It is a front view of the dust collection system which shows the other modification example of a slide part. It is a top view of the dust collection system which shows the other modification example of a slide part. FIG. 22 is a cross-sectional view taken along the line EE of FIG. FIG. 22 is a cross-sectional view taken along the line FF of FIG. It is a perspective view of a guide metal fitting. FIG. 4 is a cross-sectional view taken along the line GG of FIG. 24.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 to 3 show an example of a dust collecting system S in which a dust collecting device for a power tool (hereinafter, simply referred to as a “dust collecting device”) 40 is attached to a hammer drill 1 which is a power tool, and FIG. 1 shows a front view. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a front view.
(Explanation of hammer drill)
As shown in FIGS. 5 and 8, in the hammer drill 1, a motor housing 3 for accommodating the motor 4 with the output shaft 5 facing upward is internally provided in the lower front side of the main body housing 2 in the vertical direction, and above the motor housing 3. A gear housing 6 accommodating a crank mechanism and a rotation mechanism is installed internally, a front housing 7 accommodating a tool holder in a forward direction is assembled in front of the gear housing 6, and a U-shaped side view handle housing is attached to the rear part of the main body housing 2. 8 are connected. A tip tool (in FIGS. 1 to 3 shows a drill bit (hereinafter referred to as "long bit LB") capable of handling a maximum drilling depth of 120 mm or more) can be attached to the tip of the tool holder by the operation sleeve 9. It has become. Reference numeral 10 denotes a switch lever provided in the switch built in the handle housing 8, and reference numeral 11 denotes a power cord.

The tool holder is provided with a striking mechanism including a piston that reciprocates by the connecting rod of the crank mechanism, and the striking mechanism is operated by the change lever 12 provided on the side surface of the main body housing 2 to give a striking effect to the tip tool. You can select the hammer mode to operate, the drill mode to operate the rotating mechanism to rotate the tip tool together with the tool holder, and the hammer drill mode to operate the striking mechanism and the rotating mechanism at the same time to give striking and rotation to the tip tool. ing.

In the motor housing 3, as shown in FIG. 8, the output shaft 5 of the motor 4 penetrates the gear housing 6 and meshes with a gear (not shown) of the crank mechanism, and a fan formed below the gear housing 6 is formed. In the housing chamber 13, an upper fan 14 and a lower fan 15, which are centrifugal fans, are provided above and below the output shaft 5 via a partition plate 16, respectively. An opening 17 communicating with the fan accommodating chamber 13 is formed on the front surface of the main body housing 2, while a lower intake port 18 is formed on the lower back surface of the motor housing 3.

Further, above the upper fan 14, the fan accommodating chamber 13 has a through hole 21 for the output shaft 5 and extends from above the upper fan 14 to the front surface of the main body housing 2, and is left and right and rearward of the fan accommodating chamber 13. A countersunk member 19 is provided which includes a lower plate 20 which is one size smaller and a peripheral plate 22 which is erected along the outer periphery of the lower plate 20 and closes between the gear housing 6. The dish member 19 forms a separation chamber 23 in the fan accommodating chamber 13 that communicates with the upper fan 14 and partitions the inside. The front portion of the lower plate 20 of the dish member 19 becomes a deep bottom portion 24 that drops one step downward inside the front portion of the main body housing 2, and the peripheral plate 22 also extends downward together with the deep bottom portion 24 to the front surface of the main body housing 2. The opening 17 is closed. Three vertically long square-shaped upper intake ports 25, 25, which are one size smaller than the opening 17, are formed side by side in the left-right direction in the closed portion on the front surface. On the right side surface of the main body housing 2, exhaust ports 26 and 26 on the machine side are formed so as to pass between the main body housing 2 and the gear housing 6 and communicate with the fan accommodating chamber 13.

Behind the upper intake port 25, the deep bottom portion 24 accommodates a shutter member 27 whose lower end is rotatably supported by pins 28 in the left-right direction. Under normal conditions, the shutter member 27 is urged to a forward standing position by a torsion spring 29 that is wound around a pin 28 and engages with the deep bottom portion 24 and the shutter member 27. On the front surface of the shutter member 27 in the upright position, three fitting protrusions 30, 30 ... That fit into each upper intake port 25 and close each upper intake port 25 are projected.
Further, on the lower front side of the main body housing 2, a receiving flange 31 projecting along the front peripheral surface of the main body housing 2 and a semicircular shape provided symmetrically to the left and right and open upward and left and right outward. Lower notches 32 and 32 are provided. Further, a claw 33 protruding rearward and downward is formed on the lower surface of the front housing 7, and a side handle 34 can be attached to the front housing 7.

(Explanation of dust collector)
As shown in FIGS. 9 to 11, the dust collector 40 has a main body case 41 attached to the hammer drill 1, a dust box 42 detachably attached to the main body case 41, and a tip connected to the main body case 41. It is composed of a slide portion 43 provided with a nozzle 44.
First, the main body case 41 is a vertically long box-shaped body in which the left and right half cases 41a and 41b are combined, and the front surface is the connecting surface of the dust box 42 and the rear surface is the mounting surface for the hammer drill 1. As shown, a square hole 45 is formed through the hammer drill 1 at a position corresponding to the upper intake port 25. Further, a plurality of contact ribs formed on the rear surface of the main body case 41 below the square hole 45 along the front shape of the motor housing 3 of the hammer drill 1 and in contact with the front surface of the motor housing 3 when mounted on the motor housing 3. 46, 46 ... are arranged.
Further, a guide groove 47 for receiving the claw 33 when mounted on the hammer drill 1 is recessed in the front-rear direction on the upper surface of the main body case 41, and a rocking plate is provided inside the main body case 41 below the guide groove 47. 48 is provided sideways.

As shown in FIG. 8, the swing plate 48 is supported so as to be swingable up and down by a shaft 49 in the left-right direction provided at the front end, and a hook 50 is provided upward at the center in the left-right direction at the rear end. Therefore, it can appear and disappear in the guide groove 47 through the through hole 51 provided in the main body case 41. The rocking plate 48 is urged at an upward position where the hook 50 projects into the guide groove 47 by a torsion spring (not shown) provided on the shaft 49. A button portion 52 is provided on the upper surface of the central portion of the rocking plate 48, and projects to the upper surface of the main body case 41 through the opening 53. Therefore, if the rocking plate 48 is swung downward by the pushing operation of the button portion 52, the hook 50 can be retracted downward from the guide groove 47.

Further, on the left and right sides of the rear surface of the main body case 41, locking plates 54, 54 capable of contacting both front surfaces of the motor housing 3 of the hammer drill 1 are provided in the vertical direction, and the locking plates 54, 54 are provided. Locking shafts 55 and 55 projecting from each other to the opposite sides are projected from the lower portion. The abutting rib 46 is formed between the locking plates 54 and 54, and the locking shafts 55 and 55 receive the abutting rib 46 at the lowest position and are locked to the flange 31. , 32 can be locked.
On the other hand, a locking step portion 56 is formed on the upper inner surface of the front surface of the main body case 41 to elastically lock the attachment / detachment locking claw 129 described later of the dust box 42, and on the lower inner surface of the dust box 42. A shaft portion 57 into which the receiving recess 123 can be fitted is formed in the left-right direction.

An intermediate cylinder 58 is provided on the upper left side of the main body case 41. As shown in FIG. 9, the intermediate cylinder 58 is formed by a half-split case 41a on the left side of the main body case 41 and an outer cover 59 screwed to the half-split case 41a, and opens forward to the left. A guide tube portion 61 that communicates with the receiving tube portion 60 at the upper end and is formed downward along the left side surface of the main body case 41, then bends forward, and the lower end opens forward. And have.
Further, a support arm 62 for supporting the slide portion 43 from below is provided on the upper left side of the main body case 41 in front of the intermediate cylinder 58. The support arm 62 projects diagonally forward from the main body case 41, and on the upper surface, as shown in FIGS. 6 and 12, the upper and lower receiving surfaces 63 near the main body case 41 and the lower receiving surface 64 on the outer side thereof are vertically and vertically projected. It has a two-tiered horizontal receiving surface. The slide portion 43 is slidably held back and forth as described later via a guide metal fitting 65 fixed across the receiving surfaces 63 and 64. Positioning protrusions 66, 66 of the guide metal fittings 65 are projected from the front and rear end edges of the upper receiving surface 63, and an arc-shaped stopper 67 that wraps around to the left outer side of the slide portion 43 is projected from the left side of the support arm 62. ing.

The slide portion 43 is a hollow tubular body made of metal such as aluminum, and elongated holes 70 are formed on the right side surface in the front-rear direction. Two upper and lower rails 71 and 71 are provided in parallel on the left side surface over the entire length, and a front stopper 72 that engages with both rails 71 and 71 from above and below and can slide along the rails 71 and 71. And the rear stopper 73 is provided in the front-rear direction with the stopper 67 of the support arm 62 interposed therebetween. A rack 74 composed of a plurality of teeth is provided between the rails 71 and 71, and each of the front and rear stoppers 72 and 73 is provided with a lock button 75 that is urged upward while meshing with the rack 74. Has been done. Therefore, when the lock button 75 is pushed in to release the engagement with the rack 74, the front and rear stoppers 72 and 73 can slide along the rails 71 and 71, and when the lock button 75 is released from being pushed in, the lock button 75 moves upward. It returns to the protruding position of the above and meshes with the rack 74 to restrict the sliding of the front and rear stoppers 72 and 73.

The nozzle 44 is a tubular body that is connected to the front end of the slide portion 43 and projects diagonally upward to the right from the slide portion 43 at a substantially right angle, and the base end of the nozzle 44 projects inside the slide portion 43. A ring-shaped suction port 76 through which a bit penetrates is formed at the tip of the nozzle 44, and a rubber cap 77 having a plurality of notches radially formed from a central through hole is formed in the opening on the rear side of the suction port 76. A rubber closing ring 78 that is fitted and that closes the opening on the front side with the surface to be machined in contact with the surface to be machined is detachably fitted.
Further, in the slide portion 43, a bellows-shaped flexible hose 79 that is a part of the dust collection path is connected between the receiving cylinder portion 60 of the intermediate cylinder 58 and the base end of the nozzle 44. The rear end of the slide portion 43 here is open, and the rear portion of the flexible hose 79 inside is exposed and connected to the receiving cylinder portion 60.

(Explanation of the guide structure of the slide part)
Next, the guide structure of the slide portion 43 by the guide metal fitting 65 will be described in detail.
First, as shown in FIG. 14, the guide metal fittings 65 include an upper plate 80 screwed to the upper receiving surface 63 of the support arm 62, a lower plate 81 mounted on the lower receiving surface 64, and upper and lower plates. It is composed of a connecting portion 82 that connects 80 and 81 to each other. The upper plate 80 has a rectangular shape whose outer shape extends in the front-rear direction in a plan view, and has a pair of screwing holes 83 and 83 at both front and rear ends and a pair of notches 84 and 84 on the outside thereof. The lower plate 81 also has a rectangular shape whose outer shape in a plan view extends in the front-rear direction, but a relief recess 85 that opens to the outside is formed in the central portion in the longitudinal direction.

Further, the lower plate 81 is formed with a pair of rising portions 86, 86 rising from the left and right longitudinal sides, and a pair of covering portions 87, 87 extending inward from the upper ends of the rising portions 86, 86 so as to face each other. ing. The outer rising portion 86 and the covering portion 87 are separated in the front-rear direction by the relief recess 85.
In the guide metal fitting 65, the upper plate 80 is placed on the upper receiving surface 63 and the lower plate 81 is placed on the lower receiving surface 64, respectively, and the positioning protrusion 66 of the upper receiving surface 63 is placed on the notches 84 and 84 of the upper plate 80. The upper plate 80 is fixed to the support arm 62 by screwing the upper plate 80 to the upper receiving surface 63 with the screws 88 and 88 through the screw fixing holes 83 and 83 in the state where the 66s are fitted and positioned respectively.

On the other hand, a guide rail 90 is integrally provided on the lower surface of the slide portion 43 with the same metal along the longitudinal direction. The guide rail 90 has an inverted T cross section including an upper rail 91 formed downward along the lower edge of the elongated hole 70 and a lower rail 92 orthogonally connected to the lower end of the upper rail 91. It has a character shape, and the lower rail 92 is fitted to the lower plate 81 of the guide metal fitting 65 from the longitudinal direction, and the upper rail 91 is passed between the covering portions 87 and 87, so that the guide metal fitting 65 slides in the front-rear direction. Guided as possible. The lower rail 92 is fitted to the lower plate 81, and is formed on the lower surface 92a that abuts on the bottom surface of the lower plate 81 and the left and right rising portions 86 and 86, except for the concave groove 93 that is recessed in the bottom surface in the longitudinal direction. The left and right side surfaces 92b and 92b that come into contact with each other and the upper surface 92c that comes into contact with the covering portions 87 and 87 are guided by four surfaces.

Further, as shown in FIG. 6, the lower plate 81 and the guide rail 90 are in a region below the horizontal cross-sectional line L passing through the center O of the slide portion 43 and wider than the left-right width H of the slide portion 43. The lower plate 81 and the guide rail 90 are arranged within a small width (in a region where the lower plate 81 and the guide rail 90 do not protrude from the plan view of the slide portion 43).
Therefore, the slide portion 43 is held so as to be movable back and forth on the upper left side of the main body case 41 within the range where the front and rear stoppers 72 and 73 come into contact with the stopper 67 in a state where the rotation is restricted by the guide metal fitting 65. As the slide portion 43 moves back and forth, the flexible hose 79 expands and contracts between the base end of the nozzle 44 and the receiving cylinder portion 60 of the intermediate cylinder 58. The receiving cylinder portion 60 is smaller than the inner diameter of the slide portion 43, and when the slide portion 43 retracts, the receiving cylinder portion 60 relatively enters the slide portion 43 through the elongated hole 70. The retreat of the slide portion 43 is allowed.

On the other hand, in the support arm 62, below the lower plate 81 of the guide metal fitting 65, as shown in FIG. 7, a spiral spring 94 is rotatably supported by a support pin 95 in the left-right direction. The outer peripheral end portion 94a of the spiral spring 94 reaches the upper surface of the lower plate 81 through the through hole 96 provided in the lower receiving surface 64 and the relief recess 85 of the lower plate 81, and the concave groove of the lower rail 92 as it is. It is pulled out to the rear of the guide metal fitting 65 through the inside of 93, is screwed to the rear end of the lower rail 92, and is connected to a stop ring 97 that regulates the retracted position of the rear stopper 73. Therefore, the slide portion 43 in the normal state is urged to the forward position (initial position) where the rear stopper 73 abuts on the stopper 67 by the tensile force of the spiral spring 94.

Next, as shown in FIGS. 15 to 17, the dust box 42 can be rotated by a deep-bottom box-shaped box body 100 and a hinge shaft 102 on the opening 101 side of the box body 100 and on one end side in the longitudinal direction. It comprises a lid 103 to be coupled. The lid 103 is integrally formed with a square tubular filter storage portion 104 that is one size smaller than the box body 100. The filter accommodating portion 104 protrudes into the box body 100 with the opening 101 of the box body 100 closed, and inside, a rectangular frame 106 fitted in the opening on the lid 103 side. , A filter unit 105 to which a paper filter 107 folded in the lateral direction at a crease parallel to the longitudinal direction of the frame body 106 is housed. A cap cover 108 is put on the opening on the lid 103 side, and the filter unit 105 is fixed by the cap cover 108. At the end of the lid 103 opposite to the hinge shaft 102, a loop portion 109 having an L-shaped side view and having a tip extending parallel to the outside of the filter accommodating portion 104 is formed.

Further, on the left edge side of the lid 103, a square cylinder 110 which is connected to the guide cylinder 61 in a state of being connected to the main body case 41 and whose front and rear ends are opened is provided orthogonally to the lid 103 and is provided in the box main body 100. It protrudes inward. On the inner surface of the box body 100, an arc groove-shaped guide path 111 in which the square cylinder 110 is housed is formed so as to project to the outer surface along the circumferential direction. However, the guide path 111 is gradually formed shallower toward the front, and is continuously connected to the box body 100 in front of the filter accommodating portion 104. Further, the inner surface of the box body 100 projects parallel to the filter accommodating portion 104 side at the upper and lower ends of the guide path 111, extends in the circumferential direction from the side surface of the filter accommodating portion 104 on the square cylinder 110 side, and is opposite to the filter accommodating portion 104. A pair of upper and lower ribs 112 and lower ribs 113 that wrap around to the side surface are formed.
The filter accommodating portion 104 also closes the protruding end into the box body 100, and has a horizontally long ventilation hole only in the region on the side opposite to the hinge shaft 102 on the short side (upper short side) near the protruding end. 114 is formed.

A square tubular device-side exhaust port 115 is formed on the upper side of the cap cover 108. The device-side exhaust port 115 is a cylinder that penetrates the square hole 45 of the main body case 41, and a seal member 116 is provided at the front end of the device-side exhaust port 115 over the entire circumference. Inside the dust box 42 in the device-side exhaust port 115, a U-shaped crossover piece 117 that is recessed inward is formed, and a diagonally downward holding boss 118 is formed at the bottom of the crossover piece 117. .. A separate metal contact pin 119 is inserted into the holding boss 118, penetrates the device-side exhaust port 115 and the seal member 116, and projects diagonally downward. The device-side exhaust port 115 communicates with the filter accommodating portion 104 from the outlet 120 formed on the lower side of the crossover piece 117. Reference numeral 121 denotes a locking loop provided forward from the upper surface of the cap cover 108 and locked to the locking projection 122 provided at the upper end of the lid 103 inside the loop portion 109.

On the other hand, in the box body 100, a receiving recess 123 parallel to the hinge shaft 102 is formed on the short side of the end portion on the hinge shaft 102 side. Further, at the opening on the short side of the end opposite to the hinge shaft 102, a lid locking claw 124 is formed in which the loop portion 109 of the cap cover 108 is elastically locked with the lid 103 closed. ing. On the same short surface, a bifurcated base end is held by a pair of holding portions 125, 125 protruding from the left and right of the lid locking claw 124, and the tip is a recess provided on the short surface of the box body 100. An operating member 126 that serves as an L-shaped elastic piece 127 located inside 128 is provided. On the outer surface of the operating member 126 on the base end side, a detachable locking claw 129 having substantially the same shape as the lid locking claw 124 is formed.

Therefore, when the opening 101 of the box body 100 is closed by the lid 103, the square cylinder 110 of the lid 103 is fitted into the guide path 111 of the box body 100, and the upper and lower ribs 112 and 113 are connected to the filter accommodating portion 104 by the upper and lower ribs 112 and 113. The top and bottom of the square cylinder 110 are partitioned. In this way , as shown in FIG. 16, the air sucked from the square cylinder 110 swirls in the dust box 42 between the guide path 111 and the upper and lower ribs 112 and 113 along the inner circumference of the box body 100, and the filter accommodating portion. The semicircular swirling flow path 131 that wraps around the right edge side of the lid 103 on the opposite side of the 104 and the air swirling around the swirling flow path 131 collide with each other through between the box body 100 and the filter housing portion 104. A dust separating portion 130 including an inner surface portion 132 of the lid 103 is formed. Further, a first dust collecting chamber D1 communicating with the square cylinder 110 is formed in the box main body 100, and a second dust collecting chamber D2 partitioned from the first dust collecting chamber D1 is formed in the filter accommodating portion 104. It is formed. Reference numeral 133 denotes a sealing material provided along the outer circumference on the back surface of the lid 103, which surrounds the filter accommodating portion 104 and seals between the filter accommodating portion 104 and the opening 101 of the box body 100.

The dust box 42 is oriented from the front of the main body case 41 with the lid 103 on the rear side and the receiving recess 123 on the lower side, and the receiving recess 123 is first locked to the shaft portion 57, and the shaft portion 57 is used as a fulcrum as it is. Push it into the main body case 41 so as to rotate it backward. Then, the attachment / detachment locking claw 129 is elastically locked to the locking step portion 56 of the main body case 41, and the dust box 42 is coupled to the main body case 41. At this time, the intermediate cylinder 58 of the main body case 41 is connected to and communicates with the front end of the square cylinder 110 of the dust box 42. At the same time, the device-side exhaust port 115 provided in the lid 103 penetrates the square hole 45 of the main body case 41 and projects rearward. In this state, the contact pin 119 also protrudes rearward from the square hole 45.

(Installation of dust collector on hammer drill)
In the dust collecting system S configured as described above, when the dust collecting device 40 equipped with the dust box 42 is mounted on the hammer drill 1, the locking shafts 55 and 55 of the main body case 41 are first provided on the hammer drill 1. The lower notches 32 and 32 are locked, respectively. Next, from the inclined posture, when the upper side of the dust collector 40 is rotated so as to be pushed backward and fitted to the front surface of the hammer drill 1, the hook 50 of the rocking plate 48 hits the claw 33 of the front housing 7. It comes into contact with the guide groove 47 of the main body case 41 and swings the swing plate 48 to the lower position (release position). When the hook 50 gets over the claw 33, as shown in FIG. 8, the rocking plate 48 swings upward (locking position) to project the hook 50 upward and lock it to the claw 33 of the front housing 7. Let me. This completes the installation of the dust collector 40.

With the installation of the dust collector 40, the contact pin 119 protruding from the device-side exhaust port 115 penetrating the square hole 45 of the main body case 41 comes into contact with the shutter member 27 and resists the urging of the torsion spring 29. The shutter member 27 is tilted backward to open the upper intake port 25. At the same time, the seal member 116 of the device-side exhaust port 115 is in close contact with the periphery of the upper intake port 25, and the device-side exhaust port 115 and the upper intake port 25 are communicated with each other in a sealed state. Therefore, from the suction port 76, the device is connected from the nozzle 44, the flexible hose 79 in the slide portion 43, the intermediate cylinder 58, and the square cylinder 110 of the dust box 42 via the dust separation portion 130, the ventilation hole 114, the filter storage portion 104, and the outlet 120. The dust collection path R1 leading to the side exhaust port 115 and the intake path R2 from the upper intake port 25 to the upper fan 14 from the separation chamber 23 passing above the shutter member 27 are connected.

(Punching with a bit)
Then, the initial position of the rear stopper 73 on the rails 71 and 71 of the slide portion 43 is adjusted so that the tip of the bit (long bit or short bit) is positioned at the suction port 76 that is projected and urged together with the slide portion 43. Then, the position of the front stopper 72 is adjusted according to the drilling depth. After that, when the suction port 76 is brought into contact with the surface to be drilled and the switch lever 10 of the hammer drill 1 is pushed in to turn on the switch, the motor 4 is driven and the output shaft 5 is rotated. At this time, if the drill mode or the hammer drill mode is selected by the change lever 12, the bit rotates to enable drilling into the surface to be drilled, and as the drilling progresses, the bit (here, as shown in FIG. 19). The long bit LB) penetrates the suction port 76, and the slide portion 43 retreats relatively from the support arm 62 against the urging of the spiral spring 94. At this time, the receiving cylinder portion 60 relatively advances in the slide portion 43 and contracts the flexible hose 79.

Here, the slide portion 43 slides in a state where the guide rail 90 provided on the lower side is guided by the guide metal fitting 65 on the support arm 62. The guide rail 90 is directly guided, but the guide rail 90 rattles because the lower rail 92 of the guide rail 90 is supported by the lower plate 81 of the guide metal fitting 65 on the four surfaces of the upper, lower, left, and right sides as described above. It can slide smoothly without any need. In particular, since the guide rail 90 and the lower plate 81 are arranged in a narrow area within the left and right width on the lower side of the slide portion 43, the guide rail 90 is less likely to be twisted during the slide, and the slide accuracy is improved. .. In addition, it is less likely to be damaged from the outside.

(Dust collecting action)
On the other hand, when the lower fan 15 is rotated by the rotation of the output shaft 5, outside air is sucked from the lower intake port 18 of the motor housing 3, passes through the motor 4 to be cooled, and then the fan is accommodated from the lower fan 15. It is discharged from the machine-side exhaust port 26 through the chamber 13.
At the same time, the rotation of the upper fan 14 generates a suction force at the suction port 76 of the dust collector 40, and air is sucked from the suction port 76 together with the dust generated at the time of drilling and passes through the flexible hose 79 through the nozzle 44. , The intermediate cylinder 58 enters the square cylinder 110 of the box body 100 of the dust box 42.

Then, as shown by the solid arrow A in FIGS. 16 and 18, the air discharged from the square cylinder 110 is guided by the guide path 111 and the upper and lower ribs 112 and 113 and flows along the swirling flow path 131, and the filter accommodating portion 104 It wraps around to the right side and collides with the inner surface 132 of the lid 103, the inner surface of the box body 100, and the like. Then, as shown by the dotted arrow B, the air turns upward and wraps around from the side surface of the filter accommodating portion 104 to the upper surface side, and enters the filter accommodating portion 104 through the ventilation hole 114. Therefore, the relatively large dust is separated when the air swirls in the swirling flow path 131 or when it collides with the inner surface portion 132 and changes its direction, and falls into the first dust collecting chamber D1 of the box body 100. Since the upper and lower ribs 112 and 113 are interrupted in front of the inner surface portion 132 on the right side of the filter storage portion 104, dust can fall from the space between the lower rib 113 and the inner surface portion 132.

The air that has entered the filter accommodating portion 104 passes through the filter 107, passes through the outlet 120, passes through the device-side exhaust port 115, and is discharged to the outside of the dust box 42. Then, it reaches the separation chamber 23 through the upper intake port 25, passes above the shutter member 27 in the inverted position, passes through the through hole 21 of the dish member 19, passes through the upper fan 14 and the fan accommodating chamber 13, and exhausts to the machine side. It is discharged from the mouth 26.
Therefore, the fine dust is captured by the filter 107 and stays in the filter accommodating portion 104. In this state, the filter accommodating portion 104 is separated from the first dust collecting chamber D1 except for the upper vent hole 114, so that the fine dust in the filter accommodating portion 104 is separated from the large dust in the box body 100. In this state, it is stored in the second dust collection chamber D2.

(Removal of dust collector and discharge of dust)
When removing the dust collector 40 after the work is completed, the button portion 52 is pushed in to swing the rocking plate 48 to the lower release position, the hook 50 is removed from the claw 33, and the dust collector 40 is moved forward as it is. The dust collector 40 can be removed as it is by rotating it so as to tilt it down. At the same time as this removal, the contact pin 119 moves forward to release the push of the shutter member 27, so that the shutter member 27 returns to the upright position and closes the upper intake port 25.
Dust is discharged from the dust box 42 by pushing the elastic piece 127 of the operating member 126 of the box body 100 from the front of the main body case 41 to release the locking claw 129 for attachment / detachment to the locking step 56. The shaft portion 57 can be tilted forward and removed from the main body case 41 as it is. Next, if the loop portion 109 of the lid 103 is removed from the lid locking claw 124 and the lid 103 is opened from the box body 100, large dust stored in the first dust collection chamber D1 can be discharged. it can. At this time, since the second dust collecting chamber D2 of the filter accommodating portion 104 is also opened to the outside through the ventilation hole 114 at the same time, fine dust can be discharged from the ventilation hole 114 by tilting or pointing the dust box 42 downward. It becomes.

(Effect of the invention relating to the guide of the slide portion)
As described above, according to the dust collector 40 of the above-described embodiment, the slide portion 43 is provided with the guide rail 90 slidably supported by the guide metal fitting 65 provided in the main body case 41, and the guide metal fitting 65 and the guide are provided. Since the rail 90 is arranged in the area on the lower half side of the cross-sectional line L passing through the center of the slide portion 43, the slide portion 43 is guided only by the guide rail 90 in the region on the half side of the slide portion 43. Therefore, the guide structure becomes compact and the operability in a narrow place is improved. Further, since the guide rail 90 is less likely to be exposed, the risk of damage is reduced. Further, since the guide rail 90 is guided in a narrow area, twisting and backlash are less likely to occur, and the slide portion 43 can be guided accurately while maintaining slidability.

In particular, here, the guided portion is formed as a rail-shaped protrusion (guide rail 90) protruding from the slide portion 43, and the guided surface (lower rail) is mounted on the guide rail 90 in four directions when viewed in a cross section orthogonal to the slide direction. Since the lower surface 92a, both side surfaces 92b, 92b, and the upper surface 92c) of the 92 are formed, the slide portion 43 can be smoothly guided by the guided surfaces in the four directions without rattling, and the guide accuracy is also good.
Further, since the guide portion is a metal guide metal fitting 65, the strength can be ensured.

Further, the slide portion 43 is arranged in the main body case 41 so as to be displaced from directly below the bit of the hammer drill 1 to the left side in a state where the main body case 41 is attached to the hammer drill 1, and the guide rail 90 is a slide portion. Since the guide metal fitting 65 and the guide rail 90 project downward from the slide portion 43 and are arranged in the area below the center of the slide portion 43, the guide metal fitting 65 and the guide rail 90 are exposed from the slide portion 43 in a plan view. It is less likely to be damaged from the outside (especially from above).
In addition, the main body case 41 is provided with a spiral spring 94 that projects and urges the slide portion 43 forward, and the spiral spring 94 is connected to the slide portion 43 through between the guide metal fitting 65 and the guide rail 90. Therefore, the spiral spring 94 can be connected to the slide portion 43 in a space-saving manner.

In the above embodiment, the slide portion is a single pipe, but as shown in FIGS. 20 and 21, the slide portion is inserted into the receiving cylinder portion 60 from the rear so as to cover the rear portion of the flexible hose 79. The slide portion 43 may have a telescope structure by connecting the pipes 134. In this case, the slide to the front and back of the slide portion 43 is also guided by the pipe 134, and the slidability is further improved. Further, since the flexible hose 79 is not exposed, it is possible to prevent the flexible hose 79 from being displaced or damaged.
Further, in the above embodiment, the slide portion is offset to the left side of the bit, but the present invention is not limited to this, and the support arm may be projected to the right side of the main body case to offset the slide portion to the right side of the bit.

However, in the above embodiment, the axial length of the slide portion 43 is shortened so that the rear end of the slide portion 43 is located on the front side of the receiving cylinder portion 60 to which the rear portion of the flexible hose 79 is connected at the initial position of the slide portion 43. Therefore, even if the slide portion 43 retracts by the maximum stroke, the amount of protrusion of the rear end from the receiving cylinder portion 60 to the rear can be small, and the effect that the slide portion 43 does not get in the way during the work can be obtained. That is, it is a dust collector in which a tube such as a flexible hose forming a dust collection path is inserted into a tubular slide portion provided with a nozzle and the rear end of the tube is connected to the case body. It is possible to understand the invention in which the axial length of the hose is set short at the frontmost position of the slide portion so that the rear end is located in front of the connection position between the rear end of the tube and the case body.

On the other hand, the main body case is not limited to the structure in which the slide portion is offset to the left and right side of the bit as in the above embodiment, and the slide portion 43A is located directly below the bit as in the dust collector 40A shown in FIGS. 22 to 24. It may be supported against 41.
The dust collector 40A has a side view L-shaped main body case 41 that is slidably coupled to the motor housing 3 at the lower front side of the hammer drill 1A from the front and houses the dust collector motor and the suction fan inside, and is a motor housing. Along with the coupling to 3, terminals (not shown) are electrically connected to each other and power is supplied from the hammer drill 1A.

The slide portion 43A has a front cylinder 140 to which the nozzle 44 is connected upward at the front end, a middle cylinder 141 inserted into the front cylinder 140 from the rear, and a rear cylinder 142 inserted into the middle cylinder 141 from the rear. However, it has a telescope structure consisting of three cylinders that increase in diameter toward the front. The intermediate cylinder 58 on the main body case 41 side is provided in the upper center in the left-right direction in the main body case 41, and the receiving cylinder portion 60 projecting to the upper end is connected to the rear end of the rear cylinder 142. As shown in FIG. 25, the flexible hose 79 is connected between the receiving cylinder portion 60 and the base end of the nozzle 44 in the slide portion 43A.
By adopting a telescope structure having a large diameter on the front side in this way, when the nozzle 44 retracts and the slide portion 43A contracts, the middle cylinder 141 and the rear cylinder 142 are sequentially housed in the front cylinder 140 having the maximum diameter, and the main body. Since it is sufficient to hold only the rear cylinder 142 having the smallest diameter on the case 41 side, the main body case 41 becomes compact.

Then, in order to guide the slide of the slide portion 43A, as shown in FIGS. 25 and 26, a slide bar 143 having the front and rear stoppers 72 and 73, the rail 71, and the rack 74 is connected to the left side of the front cylinder 140. It is connected in parallel and integrally with the front cylinder 140 via the plate 144. The guide rail 90A is integrally formed in an inverted T shape on the right side surface side (front cylinder 140 side) of the slide bar 143. Therefore, in this embodiment, 91A of the sideways guide rail 90A is referred to as a left rail, and 92A orthogonal to the left rail 91A is referred to as a right rail.

As shown in FIGS. 27 and 28, the guide metal fitting 65A is provided downward on the left side surface of the mounting plate 145 vertically formed in the support arm 62 between the slide portion 43A and the slide bar 143 at the front-rear position. It is screwed vertically via the mounting pieces 146 and 146. The upper edge of the guide metal fitting 65A and the lower edge excluding the mounting piece 146 are bent to the opposite side from the upper and lower rising portions 86, 86 protruding to the left and the tips of the rising portions 86, 86. Covered portions 87 and 87 are formed, and the right rail 92A of the guide rail 90A is vertically fitted therein, so that the four surfaces (guided surfaces 147a to 147d) of the right rail 92A are the guide metal fittings. It has come to be supported by the 65A. The spiral spring 94 is arranged on the left side of the guide metal fitting 65A, and the end portion 94a is pulled out rearward along the lower surface of the slide bar 143 and screwed to the stopper 148 at the rear end of the slide bar 143. ..

Also in this dust collecting device 40A, the slide portion 43A is provided with a guide rail 90A slidably supported by the guide fitting 65A provided on the main body case 41, and the guide fitting 65A and the guide rail 90A are provided with the slide portion 43A. On the left half side of the vertical cross-sectional line L1 passing through the center of the slide portion 43A, and within the height dimension smaller than the vertical height H1 of the slide portion 43A (the portion including the upper and lower rising portions 86, 86 and the guide rail 90A are It is arranged in a region (in a region that does not protrude from the slide portion 43A) when viewed from the right side of the slide portion 43A.
Therefore, the slide portion 43A can be guided only by the guide rail 90A, and the guide structure becomes compact. Further, since the guide rail 90A located between the slide portion 43A and the slide bar 143 is guided, there is less risk of damage, and the narrow portion is guided so that twisting is less likely to occur, and the slide portion 43A is accurate. Can guide you well.

In particular, here, the slide portion 43A is arranged in the main body case 41 so as to be located directly below the drill bit LB, and the guide rail 90A is arranged at a position shifted from directly below the slide portion 43A to the left side, and the guide metal fitting 65A and Since the guide rail 90A is arranged in the area on the left side of the center of the slide portion 43A, the guide metal fitting 65A and the guide rail 90 are not exposed from the slide portion 43A when viewed from the right side, and the outside (particularly the side). It is less likely to be damaged by the person).

In addition, in common with each form, a spiral spring is used here for the protruding urging of the slide portion, but the urging means is not limited to this, and a hose spring or the like can also be used.
Further, regarding the attachment / detachment of the dust collector, in the above embodiment, the lower side of the main body case is locked to rotate the upper side, but conversely, the upper side of the main body case is locked to lock the lower side. A rotating structure can also be adopted. Further, a lateral rotation type detachable structure in which one of the left and right sides is locked and the other side is rotated can also be adopted. The dust box is not limited to a detachable structure, and dust may be discharged by providing an integrated dust collecting portion in the main body case and opening the lid.

The form of the hammer drill may be a DC machine in which the motor is oriented sideways or a battery pack is used as a power source instead of the AC machine. Of course, the present invention is applicable not only to a hammer drill but also to other electric tools such as an electric drill as long as a dust collector can be attached.

1,1A ... Hammer drill, 2 ... Main body housing, 3 ... Motor housing, 4 ... Motor, 5 ... Output shaft, 6 ... Gear housing, 7 ... Front housing, 13 ... Fan housing, 14 ... upper fan, 15 ... lower fan, 18 ... lower intake port, 19 ... dish member, 23 ... separation chamber, 25 ... upper intake port, 27 ... shutter member, 26 ... book Machine side exhaust port, 40, 40A ... Dust collector for electric tools, 41 ... Main body case, 42 ... Dust box (dust collecting part), 43, 43A ... Slide part, 44 ... Nozzle, 45 ... Square Hole, 48 ... rocking board, 58 ... intermediate cylinder, 60 ... receiving cylinder part, 61 ... guide cylinder part, 62 ... support arm, 63 ... upper receiving surface, 64 ... lower receiving surface, 65, 65A ... Guide metal fittings (guide part), 76 ... Suction port, 80 ... Upper plate, 81 ... Lower plate, 82 ... Connecting part, 83 ... Screw hole, 85 ... Relief recess, 86・ ・ Rise part, 87 ・ ・ Cover part, 90, 90A ・ ・ Guide rail (guided part (projection)), 91 ・ ・ Upper rail, 91A ・ ・ Left rail, 92 ・ ・ Lower rail, 92A ・ ・ Right Rail, 92a ... bottom surface (guided surface), 92b ... side surface (guided surface), 92c ... top surface (guided surface), 93 ... concave groove, 94 ... spiral spring, 100 ... box body, 103 ... lid, 104 ... filter housing, 105 ... filter unit, 107 ... filter, 110 ... square tube, 111 ... guide path, 115 ... device side exhaust port, 116 ... seal member, 119 ... Contact pin, 130 ... Dust separation part, 143 ... Slide bar, 144 ... Connecting plate, 147a to d ... Guided surface, S ... Dust collection system, R1 ... Dust collection path, R2・ ・ Intake path, LB ・ ・ Long bit, D1 ・ ・ 1st dust collection chamber, D2 ・ ・ 2nd dust collection chamber.

Claims (6)

A main body case that can be attached to a power tool, a tubular slide portion that is provided on the main body case and has a nozzle provided with a suction port at the front end, and a dust collecting portion that stores dust sucked from the nozzle. It is a dust collector for power tools that includes
The slide portion is provided with a guided portion that is slidably supported in the front-rear direction by a guide portion provided in the main body case, and the guide portion and the guided portion have a cross section that passes through the center of the slide portion. It is placed only in the area on the half side of the line , and
The guided portion is a rail-shaped protrusion protruding from the slide portion, and the protrusion is formed with guided surfaces in four directions when viewed in a cross section orthogonal to the slide direction.
The slide portion is arranged in the main body case so as to be located directly below the tip tool of the electric tool with the main body case attached to the electric tool, and the protrusions are left and right from directly below the slide portion. A dust collector for a power tool, which is arranged at a position shifted to either side, and the guide portion and the protrusion are arranged only in a region on either the left or right side of the center of the slide portion. The dust collector for a power tool according to claim 1 , wherein the guide portion is made of metal. The dust collector for a power tool according to claim 1 or 2 , wherein the slide portion has a plurality of cylinders and has a telescopic structure that can be expanded and contracted. A main body case that can be attached to a power tool, a tubular slide portion that is provided on the main body case and has a nozzle provided with a suction port at the front end, and a dust collecting portion that stores dust sucked from the nozzle. It is a dust collector for power tools that includes
The slide portion is provided with a guided portion that is slidably supported in the front-rear direction by a guide portion provided in the main body case, and the guide portion and the guided portion have a cross section that passes through the center of the slide portion. It is placed only in the area on the half side of the line, and
The guided portion is a rail-shaped protrusion protruding from the slide portion.
The guide part is made of metal
The slide portion is arranged in the main body case so as to be located directly below the tip tool of the electric tool with the main body case attached to the electric tool, and the protrusions are left and right from directly below the slide portion. A dust collector for a power tool, which is arranged at a position shifted to either side, and the guide portion and the protrusion are arranged only in a region on either the left or right side of the center of the slide portion. The main body case is provided with a spiral spring that projects and urges the slide portion forward, and the spiral spring is connected to the slide portion through between the guide portion and the guided portion. The dust collector for a power tool according to any one of claims 1 to 4. An electric tool equipped with the dust collector for an electric tool according to any one of claims 1 to 5.

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