JP4369897B2 - Rotary cutting device - Google Patents

Description

  The present invention relates to a rotary cutting device used for cutting and removing objects such as pills generated on the surface of a textile product.

  In textile products such as clothes and carpets, there is a problem that the fibers on the surface are compacted by the action of friction applied during use to produce pills, which impairs the appearance of the product. A rotary cutting device for the purpose of cutting and removing balls has been proposed (see, for example, Patent Document 1).

  The rotary cutting device includes a rotary blade that rotates about an axis inside the housing, and a thin plate-like fixed blade that is attached so as to cover an opening provided in the housing along an outer periphery of the rotary blade. ing. A cutting blade extending in the axial length direction is provided on the outer periphery of the rotary blade, and a plurality of through-holes (blade holes) each having a blade portion on each peripheral edge are arranged side by side in the fixed blade. The cutting blade and the blade hole are in sliding contact with each other on the rotation circumference of the blade to perform a cutting action.

  The rotary cutting device configured as described above is used by rotating the rotary blade by applying the outer surface of the fixed blade that covers the opening of the housing to the surface of the fiber product on which the pills are generated. As a result, the fluff is received by a blade hole arranged in parallel with the fixed blade, protrudes inward, and is cut by the action of the cutting blade of the rotary blade that is in sliding contact with the blade hole.

  Furthermore, in the rotary cutting device disclosed in Patent Document 1, the housing is connected to a dust suction hose of a vacuum cleaner so that intake air to the dust suction hose is generated through an opening provided in the housing, and the rotary blade is provided with this rotary blade. It is configured as an impeller that generates a rotational force by the action of intake air.

According to this configuration, a dedicated power source for rotating the rotary blade is not required, and the reception of fuzz balls in each blade hole of the fixed blade is promoted by the action of intake air. Since the cut hair balls are sucked into the dust suction hose and collected together with the intake air, the post-treatment is unnecessary and the usability is improved.
Japanese Patent Laid-Open No. 7-88797

  Now, in the rotary cutting device configured as described above, in order to surely cut the pills received in each blade hole, the cutting blade provided on the peripheral surface of the rotary blade is provided with a blade hole. Further, it is important that the fixed blade is in sliding contact with the inner surface of the fixed blade.

  However, the fixed blade is a thin plate material fixedly supported along the opening of the housing, and the housing is a resin molded product in which high shape accuracy is difficult to obtain. It is difficult to assemble without eliminating the gap between the blade holes.

  A rotary cutting device configured to cut an object between a rotary blade having a cutting edge on the outer periphery and a thin plate-like fixed blade having a blade hole has been put into practical use as an electric shaver. Yes. In this type of shaving machine, the gap between the fixed blade and the cutting blade is eliminated as much as possible by increasing the forming accuracy and processing accuracy of the fixed blade, and a satisfactory sharpness is achieved by reliable cutting.

  However, in the rotary cutting device configured for cutting and removing the pills generated on the surface of the textile product, the rotary blade and the housing are also used to target textile products such as carpets. At the same time, the size of the fixed blade must be increased, and it is difficult to eliminate the gap by improving the molding and processing accuracy of the fixed blade, as in a shaving machine.

  The present invention has been made in view of such circumstances, and the blade hole and the rotary blade provided in the fixed blade are improved by improving the mounting form of the fixed blade that covers the opening of the housing provided along the outer periphery of the rotary blade. An object of the present invention is to provide a rotary cutting device that can slidably contact a cutting blade provided on the blade without gaps to reliably cut a projection from the blade hole.

The rotary cutting device according to the first aspect of the present invention has a cutting blade on the outer periphery, has a rotary blade that rotates around an axis, a housing that houses the rotary blade, and a plurality of blade holes arranged vertically and horizontally, A plate-like fixed blade attached to an opening provided in the housing along the outer periphery of the rotary blade, and an object protruding from each blade hole on the inner surface of the fixed blade is in sliding contact with the inner surface in rotary cutting device for cutting by the action of the cutting edge of the rotary blade, the fixed blade, said one edge of the upstream side in the rotation direction of the rotary blade stop with cantilevered and over the periphery of the opening, one side of its It is attached so that it can move freely in a direction along the direction and a direction perpendicular to the one surface .

In the present invention, the fixed blade is attached so as to be freely displaceable in a direction along one surface of the fixed blade itself and in a direction perpendicular to the one surface by being hooked only on the upstream side in the rotation direction of the rotary blade. The sliding contact between the cutting blade on the circumference of the rotary blade and the fixed blade is caused by the follow-up displacement of the fixed blade according to the change of the sliding contact position, and the cutting made at this sliding contact portion is surely performed. And make it stable.

In the rotary cutting device according to the second aspect of the present invention, the supporting protrusions facing the outer surface of the fixed blade with a gap are positioned on the peripheral edge of the opening on the upstream side and the downstream side in the rotational direction of the rotary blade. And the displacement of the fixed blade to the outside is allowed by tilting or bending with only the contact portion with one or both of the support protrusions as a support.

In the present invention, the fixed blade that is displaced outward by sliding under the cutting edge of the rotary blade, the Kakeji by side and reverse side, were respectively placed in the vicinity of the peripheral edge of the opening Good by supporting one or both of the support protrusions and ensuring that the fixed blade is displaced outwardly by tilting under the action of one support protrusion or bending under the action of both support protrusions. Realizes a sliding state.

Further, in the rotary cutting device according to the third invention of the present invention, the support protrusion extends over the entire width on the upstream side in the rotational direction of the peripheral edge portion of the opening or on the downstream side in the rotational direction of the peripheral edge portion of the opening. It is characterized by that.

  In the present invention, the support protrusion is brought into contact with the entire width of the fixed blade, the posture of the fixed blade in a state supported by the support protrusion is stabilized, and the follow-up displacement of the fixed blade is surely generated.

  Furthermore, in the rotary cutting device according to the fourth aspect of the present invention, the housing has a connecting portion to a dust suction pipe of a vacuum cleaner, and the rotary blade rotates by the action of intake air sucked into the dust suction pipe. It is characterized by being an impeller.

  In the present invention, the rotary blade is an impeller and is rotated by the action of intake air to the dust suction pipe, so that a dedicated drive source is not required.

In the rotary cutting device according to the first aspect of the present invention, the fixed blade attached by the latching support of only the edge on the upstream side in the rotation direction of the rotary blade follows its one surface as the rotary blade rotates.
Since it follows displaced in earthenware pots direction and a direction forming the one surface perpendicular, the cutting of the object by the sliding contact with the cutting blade and the fixed blade of the outer circumference of the rotary blade, it is possible to reliably and stably performed, also For this reason, it is not necessary to excessively increase the processing and assembling accuracy of the fixed blade, and it can be applied to a large apparatus.

  Further, in the rotary cutting device according to the second aspect of the invention, the fixed blade that is displaced outwardly with the rotation of the rotary blade is supported by the support protrusions that come into contact at the two limited positions. It is reliably generated by tilting in a state supported by only one side or by bending in a state supported by both, and a good sliding contact state with the cutting blade on the outer periphery of the rotary blade can be realized.

  In the rotary cutting device according to the third aspect of the present invention, since the support protrusion extends over the entire width of the fixed blade, the posture of the fixed blade in a state supported by the support protrusion is stabilized, and the cutting of the outer periphery of the rotary blade is performed. The sliding contact state with the blade can be maintained well.

  Furthermore, in the rotary cutting device according to the fourth aspect of the present invention, the housing that accommodates the rotary blade can be connected to the dust suction pipe of the vacuum cleaner, and the rotary blade configured as an impeller is used. The present invention has an excellent effect that the rotary blade can be rotated, and a dedicated drive source such as a motor is not required, and the apparatus configuration can be simplified.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a side sectional view of a rotary cutting device according to the present invention. As shown in the figure, the rotary cutting device according to the present invention includes a rotary blade 1, a housing 2 that accommodates the rotary blade 1, and a fixed blade 3 that has a plate shape.

  The rotary blade 1 has a plurality of (five in the figure) blades 12 that are arranged in the circumferential direction and project radially outward from the central boss portion 11 to which the rotary shaft 10 is fitted. , 12... Are formed as an impeller, and one blade 13, 13... Is attached to the tip of each blade 12, 12. .. Are attached between the weight plates 14, 14.

  FIG. 2 is an external perspective view of the rotary blade 1. As shown in this figure, each of the slats 12, 12... Is continuous with the leg portion 12a projecting radially outward from the boss portion 11 and the tip of the leg portion 12a, and on one side in the circumferential direction. And a bent portion 12b that is bent toward the end. The bent portion 12b is provided with a slit 12c having an opening at the tip over the entire width.

  As shown in FIG. 2, a cutting blade 13 attached to such a blade plate 12 includes a base portion 13a having a flat shape substantially the same width as the blade plate 12, and a blade that is continuous with the base portion 13a and bent to one side. 2, and as shown by arrows in FIG. 2, the base portion 13 a is inserted into the slit 12 c at the tip of the blade 12, and the blade portion 13 b is attached so that the direction of the blade portion 13 b is opposite to the bending direction. ing.

  Note that flanges 13c and 13c are projected outward on both sides of the base 13a of the cutting blade 13, and between the blades 12, 12 ... on both sides of the tip of the bent part 12b of the blade 12 The notch grooves 12d and 12d are provided so as to be continuous on the same circumference at, and the cutting blade 13 inserted into the slit 12c of each blade 12 is spanned between all the blades 12 and 12. In this way, the collars 13c, 13c on both sides are restrained by retaining rings (not shown) wound around the notch grooves 12d, 12d, and are restrained so that they cannot be pulled out to the outside.

  FIG. 3 is an external perspective view of the weight plate 14. As shown in the figure, the weight plate 14 includes a main body plate 14a that is curved with an appropriate curvature, and a seat that is connected to a substantially central portion of one edge of the main body plate 14a and extends radially inward of the curved circle. It is a metal board provided with the board 14b. The seat plate 14b is provided with a positioning hole 14c and a fixing hole 14d that penetrate in a thickness direction at positions separated by a predetermined length in the width direction, and a positioning hole 14c is provided at the center in the width direction of the main body plate 14a. A clearance 14e is formed by cutting and raising a portion corresponding to the width of the fixed holes 14d so as to be substantially perpendicular to the seat plate 14b.

  As shown in FIG. 2, on the outer side of the boss portion 11 of the rotary blade 1, fixing for fixing the weight plates 14, 14... Seats 15, 15 ... are provided. The fixed seat 15 has a seat surface that is substantially perpendicular to the radial direction of the boss portion 10, and a positioning projection 15a is provided on one side of the width direction on the seat surface, and a screw hole 15b is provided on the other side. Is formed.

  The spacing between the positioning projections 15a and the screw holes 15b is matched with the spacing between the positioning holes 14c and the fixing holes 14d in the seat plate 14b of the weight plate 14, and the weights to the fixing seat 15 are the same. The weight plate 14 is fixed by inserting the positioning hole 14c of the seat plate 14b into the positioning projection 15a, and tightening the fixing screw 16 (see FIG. 4) into the screw hole 15b aligned with the inside of the fixing hole 14d at this time. 14b is seated on the seating surface of the fixed seat 15.

  FIG. 4 is an external perspective view of the rotary blade 1 to which the weight plate 14 is fixed, and FIG. 5 is a side view of the same. As shown in these drawings and FIG. 1, the weight plate 14 is a curved body plate 14a. The direction is fixed so as to be in the same direction as the bending direction of the bent portion 12b in the blade 12. The escape portion 14e provided on the weight plate 14 allows a linear view of the seat plate 14b between the adjacent blade plates 12 and 12 when the weight plate 14 is fixed as described above. The operation of fitting the positioning projection 15a into the positioning hole 14c and the tightening operation of the fixing screw 16 into the screw hole 15b inside the fixing hole 14d are indicated by arrows in FIG. It is provided so that it can be conducted under the outlook.

  FIG. 6 is a side sectional view of the housing 2 that houses the rotary blade 1. As shown in the figure, the housing 2 is a cylindrical hollow container having an inner diameter capable of receiving the rotary blade 1 including the cutting blades 13, 13 attached to the tips of the blades 12, 12,. On the peripheral wall, an attachment port 20 to which the fixed blade 3 is attached and an intake port 21 for sucking outside air are opened at positions adjacent to each other in the circumferential direction. On the other side of 21, a connecting pipe 22 for connecting to a dust suction pipe of a vacuum cleaner (not shown) is integrally provided.

  FIG. 7 is an enlarged perspective view showing the vicinity of the opening position of the attachment port 20 of the fixed blade 3. As shown in this figure, the housing 2 has a holding rib 23 which is curved along the outer side of the mounting opening 20 formed along the outer periphery, and has an appropriate height from the end wall 24 on the same side. Projected. The presser rib 23 is also provided on the end wall of the housing 2 on the side opposite to that in FIG. 7 and is positioned so as to border both sides of the attachment port 20 in the width direction.

  The fixed blade 3 is attached to the attachment port 20 thus opened via the holder 4. FIG. 8 is an external perspective view of the fixed blade 3. As shown in FIG. 8, the fixed blade 3 has a large number of blade holes 30, 30 arranged in parallel vertically and horizontally on substantially the entire surface of a thin metal plate rich in elasticity. On both sides of the parallel arrangement region of these blade holes 30, 30 ..., large-sized locking holes 31, 31 ... are provided in parallel along the edge of each side.

  FIG. 9 is an external perspective view showing a state in which the fixed blade 3 is held by the holder 4, and FIG. 10 is a side sectional view of the same. As shown in these figures, the holder 4 is. It is a frame formed by providing a rectangular opening 41 at the center of a curved portion 40 that has a curvature corresponding to the outer shape of the housing 2 and is curved in an arc shape, and a flat portion 42 that connects one side of the curved portion 40. Are provided with fixing edges 44 provided with fixing brackets 43, 43 on both sides in the width direction, and a flat portion 45 communicating with the other side of the curved portion has a plurality of latching protrusions 46, 46. It is installed side by side. These latching projections 46, 46... Have a trapezoidal shape that reduces the inner thickness from the base portion toward the tip portion, and each tip portion is bent into an outward saddle shape.

  The number of juxtaposed projections 46, 46... And the spacing between them are corresponding to the number of juxtaposed holes 31, 31... As shown in FIGS. 9 and 10, the locking holes 31, 31... Aligned along the edge on one side are hooked on the latching protrusions 46, 46... And the edge on the same side is placed on the flat portion 45. In addition, the other end edge is held in a state of being placed on the flat portion 42.

  Further, support protrusions 47 and 47 are provided on the inner surface of the curved portion 40 of the holder 4 in the vicinity of both end edges of the opening 41 along the flat portions 42 and 45. These support protrusions 47, 47 are opposed to the lower surface of the fixed blade 3 having a small-diameter semicircular cross section and held as described above as shown in FIG. 10, and as shown in FIG. It extends over.

  As shown in FIG. 1, the holder 4 for holding the fixed blade 3 is inserted into one edge (the flat portion 45 side) at one edge of the mounting opening 20 provided in the housing 2 as shown in FIG. Is turned so that the circular arc portion 40 is in line with the mounting port 20, and the fixing brackets 43 and 43 provided on the other side (the flat portion 42 side) are screwed to the same side of the mounting port 20 and attached. It is done. As a result, the fixed blade 3 is bent along the opening 41 provided in the arc portion 40 of the holder 4 by the action of the holding ribs 23, 23 provided on both sides of the attachment port 20, and the state shown in FIG. At this time, the outer surface of the fixed blade 3 is in a state of being opposed to the support protrusions 47, 47 protruding from the arc portion 40 as described above via an appropriate gap.

Fixed blade 3 attached in this way, in the direction along the one surface of itself at the locking holes 31, 31 and latching projections 46, 46 ... and the hanging within the gap secured in the retaining portion It can be freely displaced. Further, the fixed blade 3 can be freely displaced within a gap secured between the support protrusions 47 and 47 in a direction perpendicular to the surface of the fixed blade 3 and further, Even after contact, it can be freely displaced by tilting with the contact position with one support protrusion 47 as a fulcrum and bending between the contact positions with both support protrusions 47, 47.

  In the rotary cutting device according to the present invention configured as described above, the connecting pipe 22 of the housing 2 is connected to the dust suction pipe of the vacuum cleaner, and as indicated by white arrows in FIG. While the intake pipe 22 is caused to generate intake air, the fixed blade 3 attached to the attachment port 20 as described above is applied to the surface of the object, for example, the surface of a textile product such as a carpet.

  The interior of the housing 2 communicates with the outside through an air inlet 21 provided in the peripheral wall and an opening 41 provided in the holder 4 of the fixed blade 3. As shown by the arrows in FIG. 1, outside air is sucked in through the intake port 21 and the opening 41, and the flow of the intake air thus generated is a rotary blade supported inside the housing 2. The rotary blade 1 is rotated counterclockwise by hitting one vane plate 12, 12.

  Further, due to the intake air generated through the opening 41, a protrusion from the surface of the object to which the fixed blade 3 covering the opening 41 is applied, for example, a pill generated on the surface of the carpet, is sucked, and the fixed blade 3 Projecting from the respective blade holes 30, 30. At this time, in the housing 2, the rotary blade 1 is rotated by the action of the intake air, and the cutting blades 13, 13,... Attached to the outer periphery of the rotary blade 1, that is, the tips of the blade plates 12, 12,. Are sequentially slidably contacted with the inner surface of the fixed blade 3, so that the protruding objects such as the pills are cut by the synergistic action of the blade holes 30, 30. The cut material cut in this way is sucked into the dust suction pipe through the connection pipe 22 together with the intake air, and is collected in the dust collecting part of the vacuum cleaner.

The rotary cutting apparatus according to the present invention, the fixed blade 3, by hooking into the latching projections 46, 46 ... holder 4 has an edge in the rotation direction upstream side of the rotary blade 1 piece supporting one surface of its , And a direction perpendicular to one surface so that the other portions can be freely displaced without any constraint. The fixed blade 3 attached in this manner first comes into contact with the cutting blade 13 provided on the outer periphery of the rotary blade 1 on the holding side, and the cutting blade 13 moves in accordance with the subsequent rotation of the rotary blade 1. The following displacement is caused by the combination of the displacements described above, so that the sliding contact between the blade holes 30, 30... Provided on substantially the entire surface of the fixed blade 3 and the cutting blade 13 of the rotary blade 2 is always good. The above-described cutting at the contact portion can be performed reliably and stably.

  In addition, as described above, the sliding contact state is such that the fixed blade 3 is tilted while being supported by one of the support protrusions 47 and 47, or the fixed blade is supported by both support protrusions 47 and 47. Therefore, it is not necessary to excessively increase the shape accuracy and assembly accuracy of the fixed blade 3. Therefore, as shown in the embodiment, it is possible to perform good and stable cutting even in a large-sized rotary cutting device that is premised on being connected to a dust suction pipe of a vacuum cleaner, and further, a shaving machine or the like When applied to a small rotary cutting apparatus, it is possible to contribute to a reduction in product cost by relaxing processing and assembly accuracy.

Further, since the support protrusions 47, 47 that support the fixed blade 3 during the operation as described above are extended over the entire width of the fixed blade 3, the support protrusions 47, 47 support the fixed blade 3 under the entire width. The posture of the fixed blade 3 is stable, and the support protrusions 47 and 47 are only in line contact with the fixed blade 3 at their respective positions, and may hinder displacement in a direction along one surface of the fixed blade 3. Is small, and the follow-up displacement of the fixed blade 3 according to the rotation of the rotary blade 1 can be surely performed.

  In the above embodiment, the case where the rotary blade 1 is configured as an impeller that generates a rotational force by the action of intake air into the housing 2 has been described. However, by transmission from a rotary drive source such as an electric motor. It goes without saying that the present invention can also be applied to a rotary cutting device including the rotary blade 1 that rotates.

It is side sectional drawing of the rotary cutting device which concerns on this invention. It is an external appearance perspective view of a rotary blade. It is an external appearance perspective view of a weight board. It is an external appearance perspective view of the rotary blade to which the weight board was fixed. It is a side view of the rotary blade to which the weight plate was fixed. It is a sectional side view of the housing which accommodates a rotary blade. It is a perspective view which expands and shows the opening position vicinity of the attachment port of a fixed blade. It is an external appearance perspective view of a fixed blade. It is an external appearance perspective view which shows the state which made the holder hold | maintain a fixed blade. It is a sectional side view which shows the state which made the holder hold | maintain a fixed blade.

Explanation of symbols

1 Rotating blade 2 Housing 3 Fixed blade 4 Holder
12 slats
13 Cutting blade
14 weight
20 Mounting slot
30 blade holes
31 Locking hole
46 Suspension protrusion
47 Supporting protrusion

Claims (4)

A rotary blade having a cutting edge on the outer periphery, rotating about the axis, a housing for housing the rotary blade, and a plurality of blade holes arranged in the vertical and horizontal directions, provided in the housing along the outer periphery of the rotary blade Rotational cutting for cutting an object protruding from each blade hole on the inner surface of the fixed blade by the action of the cutting blade of the rotary blade that is in sliding contact with the inner surface In the device
The fixed blade, said one edge of the upstream side in the rotation direction of the rotary blade hooked to the peripheral edge of the opening cantilevered, and displaced in a direction forming the direction and its one surface perpendicular along one side of its A rotary cutting device characterized by being mounted so as to be freely movable. Support protrusions facing the outer surface of the fixed blade with a gap are provided at the peripheral edge of the opening at the upstream and downstream sides in the rotational direction of the rotary blade, and the displacement to the outside of the fixed blade is The rotary cutting device according to claim 1, wherein the rotary cutting device is allowed to be tilted or bent with only a contact portion with one or both of the support protrusions as a support. The rotary cutting device according to claim 2, wherein the support protrusion extends over the entire width of the peripheral portion of the opening in the rotational direction upstream or the peripheral portion of the opening in the rotational direction downstream .   The said housing has a connection part to the dust suction pipe of a cleaner, and the said rotary blade is an impeller rotated by the effect | action of the air suck | inhaled by the said dust suction pipe. The rotary cutting device described in 1.

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