JP4730286B2 - Foreign matter removing apparatus and foreign matter removing method - Google Patents

Description

  The present invention relates to a foreign matter removing apparatus and a foreign matter removing method for removing foreign matter attached to an annular member by air blowing. More specifically, the present invention relates to a foreign matter removing apparatus and a foreign matter removing method capable of improving the removal performance of foreign matter attached to an annular member.

  Conventionally, cyclone type dust collectors (see Patent Document 1) have been widely used as foreign matter removing devices. However, in such a dust collector, the foreign matter adhering to the inner peripheral portion of an annular member such as a stator, which is a component of the motor, cannot be removed. This is because almost no air is blown to the inner periphery. For this reason, in order to remove the foreign material of the annular member such as the stator, it is necessary to perform air blow on the inner and outer circumferences of the stator.

  Therefore, for example, there is a technique described in Patent Document 2 as a foreign matter removal method by air blow. This document discloses a method for removing foreign matter by blowing air with an air gun to a mask on which a pattern is formed. Further, this document also discloses an apparatus in which foreign matter removal is automated by controlling the position of the mask in the X direction and the air nozzle in the Z direction. Since this technique is a foreign matter removing operation for a flat mask, air in one direction is blown against the mask. However, in the case of an annular member such as a stator, it is very difficult to remove foreign matters on the inner peripheral side. This is because in one direction of air blowing, there are many places where the air does not hit, so that the foreign matter removing effect cannot be sufficiently obtained. For this reason, conventionally, as shown in FIG. 12, the air blow work is manually performed while rotating the workpiece W.

However, in manual air blow work, the dispersion of foreign matter and the scattering of foreign matter to the surroundings become a problem, so the applicant is responsible for removing foreign matter adhering to an annular object such as a stator. Thus, a foreign matter removing device and a foreign matter removing method that prevent variations in foreign matter removal and scattering of foreign matter to the surroundings have been proposed (Patent Document 3).
JP-A-8-299728 Japanese Patent Laid-Open No. 10-20478 JP 2006-224667 A

However, with the technique proposed by the present applicant, it has been found that there is a possibility that foreign matter may reattach to the stator. The reason why the foreign matter reattaches in this way is that a strong swirling flow is formed around the nozzle, so that the foreign matter that has risen above that portion falls by gravity and falls on the stator after the air blow stops. It is.
It has also been found that foreign matter that has not adhered to the stator cannot be completely sucked. The reason for this lack of suction capability is that centrifugal force acts on the foreign matter due to the swirling flow, and the foreign matter collects outside the case, but the suction force is stronger on the inside and effectively sucks the foreign matter. It is because it is not possible.

  Therefore, the present invention has been made to solve the above-described problems, and provides a foreign matter removing apparatus capable of preventing foreign matter removed from an annular object from reattaching to the annular object. Let it be an issue. Moreover, this invention makes it a subject to provide the foreign material removal apparatus which can improve a suction capability, when attracting | sucking the foreign material removed from the cyclic | annular object.

In order to solve the above problems, the foreign matter removing apparatus according to the present invention is a foreign matter removing device that removes foreign matter adhering to an annular object by air blow. An inner nozzle that ejects air in a direction, an outer nozzle that ejects air obliquely inward with respect to the radial direction outside the annular object, an enclosing case that covers the annular object and is retractable, possess an air flow direction changing means for changing the nozzle and the jetted air from outside the nozzle of the air flow formed in the enclosed case orientation downward, and the air flow direction changing means, said enclosed case And at least one flat blade member fixed to the inner wall at a predetermined angle downward with respect to the horizontal direction .

  In this foreign matter removing apparatus, the annular object is air blown by the inner nozzle and the outer nozzle. At this time, since air is ejected outward from the inside of the annular object by the inner nozzle, the foreign matter adhering to the inside of the annular object is blown away. Further, since air is ejected inward from the outside of the annular object by the outer nozzle, the foreign matter adhering to the outside of the annular object is blown away. Furthermore, since the direction of these air is inclined with respect to the radial direction, the foreign matter is blown away in a direction away from the annular object. Therefore, even if the object is an annular object that cannot be blown by air in one direction, foreign matters can be easily removed. Moreover, in this foreign material removal apparatus, since the air blowing operation is automatically performed regardless of the manual operation, it is possible to prevent the variation of the foreign material attached to the annular object.

  In addition, the foreign matter removing apparatus is provided with an enclosing case that covers the annular object and can be retracted. For this reason, the annular object can be taken in and out of the enclosing case, and the foreign matter removing device is operated in the enclosing case, so that the scattering of foreign matters to the work environment can be prevented.

Here, in this foreign matter removing apparatus, an air flow (swirl flow) is formed in the enclosing case by the air jetted from the inner nozzle and the outer nozzle. The direction of the air flow is changed downward by the air flow direction changing means. As a result, a strong swirl flow is formed around the nozzle, and even if there is a foreign matter that has swollen above the swirl flow, the direction of the air flow is downward, so that the foreign matter can be trapped in the upper part of the swirl flow. Drops downward along the inner wall of the enclosure case. Accordingly, it is possible to prevent the foreign matter from falling on the stator after the air blow of the inner nozzle and the outer nozzle is stopped, that is, the reattachment of the foreign matter to the annular object.
The air flow direction changing means is at least one flat blade member fixed to the inner wall of the enclosing case at a predetermined angle downward with respect to the horizontal direction. The flow direction changing means can be configured, and the direction of the air flow formed in the enclosing case by the air injected from the inner nozzle and the outer nozzle can be changed downward. A plurality of blade members are preferably provided. This is because the effect of changing the direction of the air flow formed in the enclosing case by the air jetted from the inner nozzle and the outer nozzle is increased.
The blade member mounting angle (predetermined angle) may be about 10 to 80 degrees, preferably about 15 to 60 degrees, and more preferably about 20 to 40 degrees. This is because the direction of the air flow can be reliably lowered without excessively increasing the resistance of the swirling flow.

  In the foreign matter removing apparatus according to the present invention, a plurality of inner nozzles that are movable in the axial direction of the annular object and a plurality of outer nozzles that are movable in the axial direction of the annular object are radially provided in the enclosed case. It is desirable that

  Thereby, while being able to blow simultaneously over the circumferential direction of a cyclic | annular object, it can blow sequentially over the axial direction of a cyclic | annular object. And the foreign material blown off from the cyclic | annular object can be dropped below so that it may follow the inner wall of an enclosing case reliably. Therefore, after the air blow of the inner nozzle and the outer nozzle is stopped, it is possible to reliably prevent the foreign matter from falling on the stator, that is, the reattachment of the foreign matter to the annular object.

  Moreover, in the foreign material removal apparatus according to the present invention, it is desirable that the plurality of inner nozzles include one that ejects air in a direction inclined in the axial direction of the annular object.

  As a result, foreign matter is not confined inside the annular object, and a spiral air flow (vortex) can be formed in the enclosing case, so that the inner nozzle and the outer nozzle can move in the axial direction. This is because the foreign matter blown off from the annular object can be dropped downward along the inner wall of the enclosure case even if it is not. When the inner nozzle and the outer nozzle are movable in the axial direction, a synergistic effect can be obtained. Therefore, the foreign matter is more reliably dropped downward along the inner wall of the enclosing case. be able to.

Moreover, in the foreign material removal apparatus which concerns on this invention, it is desirable for the said blade member to be provided in multiple steps | paragraphs in different height positions.
In addition, it is preferable that a plurality of blade members are provided at equal intervals on the same stage, and further, the blade members are provided so as to be shifted for each stage (so that the blade members at different stages do not coincide in top view). More preferred.

  Thereby, the direction of the air flow formed in the enclosing case by the air jetted from the inner nozzle and the outer nozzle can be efficiently changed downward. If the number of stages is increased, the effect of changing the air flow downward increases, but the resistance of the swirl flow increases and the cleaning work in the enclosing case takes time. It is good to provide about steps.

  The foreign matter removing apparatus according to the present invention further includes a suction unit that sucks air from the space covered by the enclosing case, and a limiting unit that limits a flow passage cross-sectional area of the suction port of the suction unit. It is desirable.

  By providing the suction means in this way, the foreign matter dropped downward can be removed from the enclosing case. The foreign matter removing apparatus is provided with a restricting means for restricting the cross-sectional area of the suction port of the suction means. For this reason, since the channel cross-sectional area of the suction port is reduced, the suction capability of the suction means can be improved. Thereby, the foreign material dropped downward in the enclosing case can be reliably removed from the enclosing case by being sucked by the suction means.

  And in the foreign material removal apparatus which concerns on this invention, it is desirable that the said limitation means is a cone cone arrange | positioned so that the said suction port may be formed in the outer peripheral part of the said suction means.

  This is because by providing such a conical cone, the foreign matter dropped downward along the inner wall of the enclosing case can be efficiently sucked. As a result, the foreign matter in the enclosure can be removed almost completely.

The foreign matter removal method according to the present invention, which has been made to solve the above problems, is a foreign matter removal method for removing foreign matter attached to an annular object by air blow. Air is ejected from the inner nozzle in the direction, and air is ejected from the outer nozzle obliquely inward with respect to the radial direction outside the annular object. The direction of the air flow formed by the air jetted from the inner nozzle and the outer nozzle is at least one flat plate fixed to the inner wall of the enclosing case at a predetermined angle downward with respect to the horizontal direction. It is characterized by being changed downward by the blade member .

  In this foreign matter removing method, the foreign matter attached to the inside and the outside of the annular object is blown off by the air jetted from the inner nozzle and the outer nozzle. At this time, since the direction of the air is inclined with respect to the radial direction, the foreign matter is blown away in a direction away from the annular object. Thereby, even if it is a cyclic | annular target object which cannot blow with the air of one direction, a foreign material can be removed easily. In addition, since the air blowing operation can be automatically performed regardless of the manual operation, it is possible to prevent variations such as the removal of foreign matters attached to the annular object. Further, in this foreign matter removing method, air blow is performed in the enclosing case, so that the foreign matter can be prevented from scattering into the work environment.

The direction of the air flow (swirl flow) formed in the enclosure case by the air injected from the inner nozzle and the outer nozzle is fixed to the inner wall of the enclosure case at a predetermined angle downward with respect to the horizontal direction. Further, it can be changed downward by at least one flat blade member . For this reason, a strong swirling flow is formed around the nozzle, and even if there is a foreign matter that has risen above the swirling flow, the direction of the air flow is downward, so that the foreign matter may be trapped in the upper part of the swirling flow. Drops downward along the inner wall of the enclosure case. Thereby, after the air blow of the inner nozzle and the outer nozzle is stopped, it is possible to prevent the foreign matter from falling on the stator, that is, the reattachment of the foreign matter to the annular object.

  In the foreign matter removing method according to the present invention, the plurality of inner nozzles arranged radially and the plurality of outer nozzles arranged radially are moved in the axial direction of the annular object, and the plurality of inner nozzles and It is desirable to eject air from the outer nozzle.

  By doing in this way, it is possible to blow simultaneously over the circumferential direction of the annular object, and it is possible to blow sequentially along the axial direction of the annular object, so that the foreign matter blown off from the annular object is surely detected. This is because it can be dropped downward along the inner wall of the enclosure case.

  In the foreign matter removing method according to the present invention, it is desirable that air is ejected from at least one of the plurality of inner nozzles in a direction inclined in the axial direction of the annular object.

  By doing so, foreign matters are not confined inside the annular object, and a spiral air flow (vortex) can be formed in the enclosing case, so that the inner nozzle and the outer nozzle can be moved in the axial direction. This is because the foreign matter blown off from the annular object can be dropped downward along the inner wall of the enclosure case without being moved. In addition, since a synergistic effect is acquired by moving an inner nozzle and an outer nozzle to an axial direction, a foreign material can be dropped down more reliably along the inner wall of an enclosing case.

  Moreover, in the foreign material removal method which concerns on this invention, it is desirable to attract | suck air from the suction opening formed in the bottom part outer periphery of the space covered with the said enclosing case.

  By doing in this way, the foreign material dropped below can be removed from the enclosing case. And in this foreign material removal method, air is attracted | sucked from the suction opening formed in the bottom part outer periphery of the space covered with the enclosing case. Here, by forming the suction port only on the outer periphery of the bottom, the cross-sectional area of the suction port can be reduced, so that the suction capability is improved. As a result, the foreign matter dropped downward along the inner wall of the enclosure case can be sucked efficiently, and the foreign matter in the enclosure can be removed almost completely.

  According to the foreign matter removing apparatus and the foreign matter removing method according to the present invention, as described above, the foreign matter removed from the annular object can be prevented from reattaching to the annular object. Moreover, according to the foreign material removal apparatus and foreign material removal method which concern on this invention, as above-mentioned, when attracting | sucking the foreign material removed from the cyclic | annular object, a suction capability can be improved.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a most preferred embodiment embodying a foreign matter removing apparatus and a foreign matter removing apparatus according to the present invention will be described in detail with reference to the drawings. In the present embodiment, the case where the present invention is applied to the removal of foreign matter from the stator, that is, the finishing process of the stator manufacturing process will be described.

  Therefore, the foreign matter removing apparatus according to the present embodiment will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram showing an outline of the foreign matter removing apparatus according to the present embodiment. FIG. 2 is a schematic configuration diagram showing an outline of the inside of the enclosing case and the suction unit. FIG. 3 is an explanatory view showing the arrangement position of the blades in the enclosure case and the position of the suction port of the suction unit. FIG. 4 is a perspective view showing a central nozzle of the foreign matter removing apparatus. FIG. 5 is a side view showing the central nozzle of the foreign matter removing apparatus. FIG. 6 is a plan view showing the central nozzle of the foreign matter removing apparatus. FIG. 7 is an explanatory view showing the arrangement of the central nozzle and the peripheral nozzle of the foreign matter removing apparatus.

  As shown in FIG. 1, the foreign matter removing apparatus 1 includes a work table 10, an air device 20 at the lower part, and an enclosing case 30 and an air nozzle 40 at the upper part. Further, a transport path 11 for transporting the workpiece W is formed on the upper surface of the work table 10. As a result, the workpiece W placed on a dedicated pallet is conveyed along the conveyance path 11 from the right to the left in the drawing. Here, the workpiece W is an annular stator, and is placed with its axial direction directed in the vertical direction in the figure. The work W on the left side in FIG. 1 is set in the foreign matter removal position. The right workpiece W shows a state of waiting on the conveyance path 11 in order to remove foreign matter next.

  A suction part 12 for sucking foreign matter is formed in the lower part of the work table 10. The air device 20 is configured to blow out air from the air nozzle 40 and suck air from the suction unit 12. Although not shown in FIG. 1, a filter 21 for separating foreign substances is provided in the suction path from the suction unit 12 (see FIG. 9).

  The suction portion 12 has an inverted conical shape, and a conical cone 25 is attached to the upper portion thereof. Thereby, the suction port 26 in the suction part 12 is formed in an annular shape on the outer peripheral part of the suction part 12 (see FIG. 3). Therefore, the area of the suction port 26, that is, the cross-sectional area of the flow path at the suction port 26 is reduced, and the flow velocity of the air passing through the suction port 26 is increased. In the present embodiment, the suction unit 12 and the conical cone 25 are made of metal.

  The enclosing case 30 has four pillars 31 and a transparent partition wall 32 such as an acrylic plate attached between them. The bottom surface of the enclosing case 30 is open and can be moved in the vertical direction by a lifting cylinder or the like. The upper surface of the enclosing case 30 is closed except for a hole for the air nozzle 40. FIG. 1 shows a state where the enclosing case 30 is lowered. In this state, the inside of the enclosing case 30 is blocked from the outside and communicated with the suction unit 12, and a closed space is formed by the enclosing case 30 and the suction unit 12.

  The blades 35 and 36 are attached (fixed) to the inner wall of the enclosing case 30. The blades 35 and 36 are flat plate members having the same shape, and are made of the same material as the enclosing case 30 (such as an acrylic plate). As shown in FIG. 3, each of the blades 35 and 36 is provided in three pieces, and is fixed at a predetermined angle downward with respect to the horizontal direction as shown in FIG. With such blades 35 and 36, the direction of the air flow formed in the enclosing case 30 by the air jetted from the air nozzle 40 described later can be changed downward.

  The mounting angle (predetermined angle) of the blades 35 and 36 may be about 10 to 80 degrees, preferably about 15 to 60 degrees, and more preferably about 20 to 40 degrees. This is because the direction of the air flow can be reliably lowered without excessively increasing the resistance of the swirling flow. In the present embodiment, the attachment angle of the blades 35 and 36 is 30 degrees.

  Here, the blades 35 are provided in the upper stage of the enclosure case 30, and the blades 36 are provided in the lower stage of the enclosure case 30. In each of the upper blade 35 and the lower blade 36, three blades are arranged at the same height at equal intervals. Further, as shown in FIG. 3, the blades 35 and the blades 36 are alternately arranged so as not to coincide with each other when viewed from above. Thereby, the direction of the air flow formed in the enclosure case 30 can be efficiently changed downward by the air jetted from the air nozzle 40 described later, and the workability of the cleaning work in the enclosure case 30 is deteriorated. It is supposed not to let you.

  The air nozzle 40 has a central nozzle 41 and four peripheral nozzles 42 arranged on the four sides thereof. The air nozzle 40 is integrally movable in the vertical direction by a lifting cylinder or the like different from the enclosing case 30. This vertical movement can be performed independently of air injection / stop from the air nozzle 40. When the air nozzle 40 is lowered, the central nozzle 41 is disposed on the inner peripheral side of the work W, and the peripheral nozzle 42 is disposed on the outer peripheral side of the work W.

  As shown in FIGS. 4 to 6, the central nozzle 41 has a total of six nozzles 44 around the nozzle base 43. 5 shows the right half of the cross-sectional view seen from the right front side in FIG. 4, and the left side from the A line in FIG. 5 shows the left half of the cross-sectional view seen from the left front side in FIG. FIG. 6 is a view as seen from the upper side in FIG. That is, two nozzles 44 of the central nozzle 41 are provided on each of the left front side and the right back side in FIG. 4, and one nozzle 44 is provided on each of the right front side and the left back side in FIG.

  Further, among these nozzles 44, the nozzle base 44a of the nozzle 44 on the left front side and the right rear side in FIG. 4 is about 30 ° above or below the horizontal direction as shown on the right side from the line A in FIG. Is directed to. In the lower side of the right rear side in FIG. Further, the nozzle base 44a of the nozzle 44 on the left back side in FIG. 4 is arranged in the horizontal direction as shown on the left side of the line A in FIG. The same applies to the nozzle 44 on the right front side in FIG. As shown in FIG. 6, the nozzle tips 44b of all six nozzles 44 are bent counterclockwise by about 30 ° with respect to the nozzle base portions 44a.

  On the other hand, each of the peripheral nozzles 42 has one outlet on each side of the central nozzle 41. The peripheral nozzle 42 is a straight outlet. As shown in FIG. 7, the air blowing direction of each peripheral nozzle 42 is a direction toward each of the other peripheral nozzles 42 adjacent to each other in the counterclockwise direction. Because of this arrangement, the swirl flow can be generated in the enclosing case 30 by combining with the air from the nozzles 44 of the central nozzle 41.

  The foreign matter removing apparatus 1 configured as described above is configured such that an operator stands on the front side in FIG. Therefore, a foreign matter removing step 60 using the foreign matter removing apparatus 1 will be described with reference to FIGS. FIG. 8 is a process diagram showing a foreign matter removing process. FIG. 9 is an explanatory view showing the operation of the foreign matter removing apparatus when the stator is carried in. FIG. 10 is an explanatory diagram showing an air flow in the foreign matter removing apparatus. FIG. 11 is an explanatory diagram showing the operation of the foreign matter removing apparatus during air blowing. 9 and 11, the blades 35 and 36 are not shown.

  In the foreign matter removing step 60, first, the work W after the trimming step for removing the varnish adhered and hardened on the varnish non-attachable portion (case attaching portion or the like) of the stator is carried to the conveyance path 11 and set at the foreign matter removing position. (Step 61). In this step, as shown in FIG. 9, the enclosing case 30 and the air nozzle 40 are both in a state where they are raised to the upper end. Thereby, the workpiece | work W is conveyed substantially horizontally by the conveyance path 11, and is arrange | positioned in a predetermined position. That is, the workpiece W can be easily set on the foreign matter removing apparatus 1 of the Worth W. In this state, since suction and injection by the air device 20 are stopped, foreign matter does not scatter in the surrounding environment.

  When the workpiece W is set in the foreign matter removing apparatus 1, the enclosing case 30 is lowered (step 62). Thereby, the workpiece | work W will be in the state shielded from the surrounding environment (an operator is included) (state of FIG. 1). Next, the air device 20 is operated, and suction is started from the lower suction unit 12 (step 63). At this stage, the air nozzle 40 is still in the raised position, and no air is being injected. In addition, since the filter 21 for separating the foreign matter is provided in the middle of the suction path, the foreign matter is prevented from biting into the air device 20.

  Next, air injection from the air nozzle 40 is started (step 64). By this injection, a swirl flow of air is generated in the enclosing case 30 as shown in FIG. Then, the air nozzle 40 is gradually lowered while jetting air (step 65). Thereby, it blows in an order from the upper end part of work W to a center part and a lower end part. The work W is blown on the inner peripheral side by the central nozzle 41 and on the outer peripheral side by the peripheral nozzle 42.

  At this time, as shown in FIG. 10, in the enclosure case 30, a layer (shaded portion in FIG. 10) of strong air flow (swirl flow) 60 is located where the central nozzle 41 and the peripheral nozzle 42 are located. Is formed. For this reason, if there is a foreign matter that has risen above the swirl flow layer 80, the solitary foreign matter is confined above the swirl flow layer 80. If it does so, the foreign material confined above the swirl flow bed 80 cannot be sucked by the suction part 12. As a result, when the injection of air from the air nozzle 40 is stopped, the foreign matter confined above the swirling flow layer 80 falls and reattaches to the workpiece W.

  However, in the foreign matter removing apparatus 1, since the blades 35 and 36 are provided in the enclosing case 30, the direction of the air flow formed in the enclosing case 30 is changed downward. For this reason, even if there is a foreign matter that has risen above the swirling flow layer 80, the raised foreign matter can be dropped downward without being confined above the swirling flow layer 80. At this time, since centrifugal force acts on the foreign matter, the foreign matter falls downward along the inner wall of the enclosing case 30. In addition, since the air nozzle 40 is gradually lowered, the foreign matter removed from the workpiece W surely falls down along the inner wall of the enclosing case 30. Therefore, it is possible to reliably prevent foreign matters from reattaching to the workpiece W.

  The foreign matter falling downward is sucked from the suction port 26 formed on the outer peripheral portion of the suction portion 12 by the conical cone 25. Here, since the area of the suction port 26, that is, the cross-sectional area of the flow path at the suction port 26 is reduced, the flow velocity of the air passing through the suction port 26 is increased, and the suction performance in the suction unit 12 is improved. . Further, the foreign matter falls along the inner wall of the enclosing case 30. From these things, the suction part 12 can efficiently suck the foreign matter removed from the workpiece W and falling downward. As a result, the foreign matter in the enclosing case 30 can be sucked and removed almost completely by the suction part 12.

  Thereafter, when the air nozzle 40 is lowered to the position of FIG. 11, the movement is stopped (step 66). Subsequently, the air nozzle 40 is gradually raised (step 67), raised to the original position of FIG. 9 (in the state of FIG. 1) and stopped (step 68). What is necessary is just to adjust the upper end position and lower end position of this air nozzle 40 according to the axial direction size etc. of the workpiece | work W.

  As a result, the entire surface of the workpiece W has been blown, so that the air nozzle 40 stops ejecting air (step 69). Further, the suction from the suction unit 12 is also stopped (step 70). In addition, after stopping the injection of air from the air nozzle 40, the suction in the suction unit 12 may be continued for a while. By doing so, it is possible to suck and remove the foreign matter or the like existing in the swirl flow layer 80 along the air injection stop line from the air nozzle 40 from the enclosed case 30.

  Then, the enclosing case 30 is raised (step 71) and returned to the state of FIG. This completes the foreign matter removing step 60 of the workpiece W, so that the workpiece W is carried out to the transport path 11 (step 72). Then, the foreign material removal of the workpiece | work W can be performed one after another by repeating the above-mentioned process.

  Here, when the foreign substance removal experiment by the foreign substance removal apparatus 1 was performed, the foreign substance removal apparatus proposed by the present applicant (see Patent Document 3) was able to remove the residue amount only to about 5 to 20 mg. On the other hand, according to the foreign substance removing apparatus 1, the result that the amount of residue was almost zero was obtained. For this reason, the foreign matter removed using the foreign matter removing device 1 prevents the foreign matter removed from the workpiece W from reattaching to the workpiece W, and the foreign matter removed from the workpiece W is completely removed by the suction unit 12. You can see that it was aspirated.

  In addition to the foreign matter removing apparatus 1 of the present embodiment, it is better to add the following apparatuses. For example, if a general static elimination device is provided and static elimination is performed on the workpiece W and adhering foreign matter before the start of air blowing, the foreign matter can be more efficiently removed. Some foreign matters are attracted to the workpiece W by electrostatic force. Therefore, such foreign matter can be easily removed by performing static elimination beforehand with the static eliminator. Further, if a rotation mechanism for rotating the central nozzle 41 or rotating the air nozzle 40 as a whole is added and rotated while performing air injection, a swirl flow of air can be formed more reliably. . Further, the workpiece W may be rotated around its axis.

  As described above in detail, according to the foreign matter removing apparatus 1 according to the present embodiment, since the air nozzle 40 includes the central nozzle 41 and the peripheral nozzle 42, the inner peripheral side and the outer peripheral side of the annular workpiece W The side can be blown simultaneously. Further, each nozzle tip 44b of the central nozzle 41 is bent in the counterclockwise direction and the outlet of the peripheral nozzle 42 is directed in the counterclockwise direction, so that a swirl flow in the counterclockwise direction is formed as a whole. The Therefore, the foreign matter can be efficiently removed without particularly increasing the amount of air to be blown.

  And in the foreign material removal apparatus 1, the flat blade | wings 35 and 36 arrange | positioned downward with respect to the horizontal direction are attached to the inner wall of the enclosing case 30. As shown in FIG. For this reason, the direction of the air flow formed in the enclosing case 30 can be changed downward. As a result, even if there is a foreign matter that has risen above the swirling flow layer 80, the raised foreign matter is not confined above the swirling flow layer 80 and falls downward along the inner wall of the enclosing case 30. be able to. Therefore, it is possible to reliably prevent foreign matters from reattaching to the workpiece W.

  Further, in the suction part 12 of the foreign matter removing apparatus 1, a suction port 26 having a reduced channel cross-sectional area is formed in the outer peripheral part of the suction part 12 by the conical cone 25. For this reason, since the flow velocity of the air passing through the suction port 26 is increased, the suction capability in the suction part 12 can be improved. As a result, the suction unit 12 can efficiently suck the foreign matter that is removed from the workpiece W and falls downward, and the foreign matter in the enclosure case 30 can be sucked and removed almost completely.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, two stages of blades are provided on the inner wall of the enclosing case 30, but three or more stages of blades may be provided. This increases the effect of making the air flow downward. However, if the number of blade stages is increased, the workability of the cleaning operation in the enclosing case is deteriorated, and therefore the number of blades is preferably about 2 to 3 stages.

Further, for example, if the number of blowout ports is further increased so that air can be blown simultaneously over the entire vertical range of the workpiece W, a fixed nozzle that does not move up and down can be obtained. In this case, the work W may be inserted from the bottom (or top) of the nozzle into the foreign matter removal position.
Further, for example, the workpiece W from which foreign matter is to be removed is not limited to the stator, and can be used as long as it is an annular member.

It is a schematic block diagram which shows the outline of the foreign material removal apparatus which concerns on embodiment. It is a schematic block diagram which shows the outline inside an enclosing case and a suction part. It is explanatory drawing which shows the arrangement | positioning position of the blade | wing in an enclosing case, and the position of the suction opening of a suction part. It is a perspective view which shows the center nozzle of a foreign material removal apparatus. It is a side view which shows the center nozzle of a foreign material removal apparatus. It is a top view which shows the center nozzle of a foreign material removal apparatus. It is explanatory drawing which shows arrangement | positioning with the center nozzle and peripheral nozzle of a foreign material removal apparatus. It is process drawing which shows a foreign material removal process. It is explanatory drawing which shows operation | movement of the foreign material removal apparatus at the time of carrying in a stator. It is explanatory drawing which shows the air flow in a foreign material removal apparatus. It is explanatory drawing which shows operation | movement of the foreign material removal apparatus in performing air blow. It is explanatory drawing which shows the conventional foreign material removal method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Foreign material removal apparatus 10 Work table 11 Conveyance path 12 Suction part 20 Air equipment 21 Filter 25 Conical cone 26 Suction port 30 Enclosed case 35 Blade | blade (upper stage)
36 feathers (bottom)
40 Air nozzle 41 Center nozzle (inner nozzle)
42 Peripheral nozzle (outer nozzle)
50 Control panel 80 Swirling fluidized bed W Workpiece (stator)

Claims (10)

In the foreign matter removing apparatus that removes the foreign matter attached to the annular object by air blow,
An inner nozzle that ejects air obliquely outward with respect to the radial direction inside the annular object;
An outer nozzle that ejects air obliquely inward with respect to the radial direction outside the annular object;
An enclosing case that covers the annular object and can be retracted;
Have a an air flow direction changing means for changing the downward direction of the air flow formed in the enclosed case by injected air from the nozzle and the outer nozzle,
The foreign matter removing apparatus, wherein the air flow direction changing means is at least one or more flat blade members fixed to the inner wall of the enclosing case at a predetermined angle downward with respect to the horizontal direction . The foreign matter removing apparatus according to claim 1,
A foreign matter removing apparatus comprising a plurality of inner nozzles radially movable in the axial direction of the annular object and a plurality of outer nozzles movable in the axial direction of the annular object in the enclosure case. . The foreign matter removing apparatus according to claim 2,
The foreign matter removing apparatus, wherein the plurality of inner nozzles include one that ejects air in a direction inclined in the axial direction of the annular object. In any one foreign substance removal apparatus described in Claims 1-3 ,
The blade member is provided with a plurality of stages at different height positions. In any one foreign substance removal apparatus as described in Claim 1-4 ,
Suction means for sucking air from the space covered by the enclosing case;
Limiting means for limiting the cross-sectional area of the suction port of the suction means;
A foreign matter removing apparatus characterized by comprising: In the foreign matter removal apparatus according to claim 5 ,
The foreign matter removing apparatus according to claim 1, wherein the restricting means is a conical cone disposed so that the suction port is formed on an outer peripheral portion of the suction means. In the foreign matter removal method of removing foreign matter attached to the annular object by air blow,
In the enclosing case that covers the annular object and can be retracted,
While ejecting air from the inner nozzle obliquely outward with respect to the radial direction inside the annular object,
Air is ejected from an outer nozzle obliquely inward with respect to the radial direction outside the annular object,
The direction of the air flow formed by the air jetted from the inner nozzle and the outer nozzle is at least one flat plate fixed to the inner wall of the enclosing case at a predetermined angle downward with respect to the horizontal direction. A foreign matter removing method characterized by changing downward with a blade member . In the foreign matter removal method according to claim 7 ,
A plurality of inner nozzles arranged radially and a plurality of outer nozzles arranged radially are moved in the axial direction of the annular object, and air is ejected from each of the plurality of inner nozzles and outer nozzles. Foreign matter removal method. In the foreign matter removal method according to claim 8 ,
A foreign matter removing method, wherein air is ejected from at least one of the plurality of inner nozzles in a direction inclined in the axial direction of the annular object. In any one of the foreign matter removing method of according to claims 7 to claim 9,
A foreign matter removing method comprising sucking air from a suction port formed on an outer periphery of a bottom portion of a space covered with the enclosing case.

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