JP2005230742A - Cleaning apparatus and cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning apparatus and a cleaning method easily removing targets to be removed, e.g. foreign matter and dirt, from pits of articles to be cleaned and being capable of contributing to e.g. reduction of the production cost of the articles. <P>SOLUTION: A spraying nozzle 30 sprays, from its tip, a pulsating cleaning flow P generated in a cleaning flow generating section 20 upward to the inside of a pit H under a specified spraying pressure so as to remove dirt D remaining in or adhered to the inside of the pit of a work piece W. The tip of the nozzle 30 dashes into the pit H and has a clearance S between it and the inside surface of the pit H for discharging dirt D. The upward spraying of the cleaning flow P from the nozzle 30 and the clearance S formed between the inside surface of the pit H and the tip of the nozzle 30 facilitate detachment and removal of dirt D. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaning apparatus and a cleaning method, and more particularly, to a cleaning apparatus and a cleaning method suitable for cleaning an inner surface of a bag hole or a bag hole-like space (hereinafter referred to as a bag hole) formed in an object to be cleaned.

  Conventionally, if a processed part that is the object to be cleaned includes a dead end with a hole in the dead end, foreign matter (processing waste such as chips or buffing powder, degreasing washing residue, etc.), dirt (processing) Cutting oil, rust-preventive grease, etc.) are likely to remain and adhere, and are difficult to remove. Therefore, a technique for performing ultrasonic cleaning after removing the air pockets formed in these bag holes (see Patent Document 1) and a nozzle having a tip injection port and an auxiliary cleaning hole on the cylindrical wall are used for the bag holes. A technique for performing jet cleaning of a gas-liquid mixture (see Patent Document 2) has been proposed. According to the techniques disclosed in these, predetermined effects can be obtained.

JP-A-9-141219 JP 2000-70878 A

  However, in the technique of Patent Document 1, it takes time to remove the air pocket, and the cycle time (also referred to as tact time) of the cleaning process becomes long, which may increase the manufacturing cost. Further, in the technique of Patent Document 2, since the continuous cleaning flow is jetted, foreign matter, dirt, etc. that have fallen off may be covered with the subsequent cleaning flow, lose their origin, and remain (reattach) without being removed. There is. Furthermore, disturbance factors are likely to act on the mixing of gas and liquid, and if the injection pressure is increased to compensate for the deterioration of the cleaning performance at that time, the discharge of the removed dirt is further hindered.

  An object of the present invention is to provide a cleaning apparatus and a cleaning method that can easily remove a foreign object, dirt, and other objects to be removed from a bag hole of an object to be cleaned and contribute to a reduction in manufacturing cost of the object to be cleaned.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-described problems, the cleaning device of the present invention includes:
A cleaning device for cleaning an inner surface of a bag hole or a bag hole-like space formed in an object to be cleaned (hereinafter referred to as a bag hole),
A cleaning flow generator for generating a pulsating cleaning flow;
At least in the state immersed in the cleaning solution together with the bag hole, the pulsating cleaning flow generated by the cleaning flow generation unit is jetted upward toward the inner surface of the bag hole that opens downward, and remains in the bag hole.・ A spray nozzle that removes foreign matter such as attached processing waste and removal targets such as dirt,
It is characterized by providing.

In order to solve the above-mentioned problem, the cleaning apparatus of the present invention is
A cleaning device for cleaning an inner surface of a bag hole or a bag hole-like space formed in an object to be cleaned (hereinafter referred to as a bag hole),
A cleaning flow generator for generating a pulsating cleaning flow;
At least in the state immersed in the cleaning solution together with the bag hole, the pulsating cleaning flow generated by the cleaning flow generation unit is jetted upward toward the inner surface of the bag hole that opens downward, and remains in the bag hole.・ A plurality of spray nozzles that remove foreign matter such as attached processing waste, dirt, etc., and
It is characterized by providing.

  According to these cleaning apparatuses, foreign matter, dirt, and the like that have floated from the inner surface of the bag hole due to the pulsating cleaning flow fall off from the inner surface, and are pushed out (removed) from the bag hole and diffused into the cleaning liquid. Moreover, since the opening of the bag hole is arranged downward and the pulsating cleaning flow is jetted upward, once removed foreign matter, dirt, etc., are not easily reattached to the inner surface of the bag hole due to the drop action due to gravity. The occurrence of defects can be suppressed. As described above, foreign matters, dirt, and the like are smoothly removed and water splashes are hardly generated at that time, and an operation for removing the air pocket formed in the bag hole before the cleaning is not required. Therefore, the cycle time of the cleaning process is shortened, and the defective product generation rate is reduced (yield is improved), whereby the manufacturing cost of the object to be cleaned can be reduced. Moreover, since there is little possibility of deteriorating the work environment, it is possible to save the labor and cost of environmental maintenance (environmental conservation, environmental maintenance, etc.), and the manufacturing cost can be suppressed from this point.

  Furthermore, for example, when the diameter of the bag hole is large, the cycle time of the cleaning process can be further shortened by arranging a plurality of injection nozzles that inject the pulsating cleaning flow upward toward the inner surface of the bag hole. It becomes. Note that “downward (downward)” and “upward (upward)” may be an oblique direction other than the vertical vertical direction. Therefore, the case where the axis of the injection nozzle is vertically up and down and the injection port is opened obliquely upward is also included. The inner surface of the bag hole includes a bottom surface and an inner peripheral surface. The “bag hole-shaped space” refers to a space in which one opening of the through hole is closed by a plug or the like.

  In these cleaning apparatuses, the tip portion of the injection nozzle enters the inside of the bag hole and faces the inner surface of the bag hole with a gap for discharging the object to be removed between the inner surface of the bag hole. The pulsating cleaning flow can be jetted. By causing the tip of the spray nozzle to enter the bag hole, the peeling (stripping) force of foreign matter, dirt, etc. from the inner surface of the bag hole becomes even stronger, so that particularly the bottom of the bag hole is better cleaned. In addition, due to the pushing force of the pulsating cleaning flow, the dropped foreign matter, dirt, and the like are easily diffused into the cleaning liquid from the gap between the inner surface of the bag hole and the tip of the spray nozzle. The gap between the inner surface of the bag hole and the tip of the injection nozzle includes the gap between the bottom of the bag hole and the tip of the injection nozzle, and the inner peripheral surface of the bag hole and the outer periphery of the tip of the injection nozzle. The gap between is included. Also, the amount of entry from the opening of the nozzle hole at the tip of the injection nozzle, and the size of the gap between the inner surface of the bag hole and the outer surface of the injection nozzle, the discharge pressure / discharge amount of the pulsating cleaning flow, the size of the bag hole / injection nozzle Etc. can be appropriately determined as parameters.

  Next, the cleaning flow generator is configured with a reciprocating pump that generates a pulsating cleaning flow by alternately repeating a discharge timing portion for discharging the cleaning liquid and a discharge suspension timing portion for stopping the discharge of the cleaning liquid, 1 ≦ Q / V = Q / (Vh−Vn) where V is the actual volume of the bag hole obtained by subtracting the total volume Vn of the injection nozzle from the total volume Vh, and Q is the discharge amount per shot of the injection nozzle. [However, when Vn = 0, it is preferable to set 1 ≦ Q / Vh]. Here, when m injection nozzles are arranged in one bag hole, values for m are used for Vn and Q. As described above, the pulsation number (pulse number) of the pulsating cleaning flow can be increased to, for example, 20 pulses / second (1200 pulses / minute) or more by using a reciprocating pump such as a piston pump, plunger pump, or bucket pump. can do. Therefore, foreign matter, dirt, etc. that floats from the inner surface of the bag hole at the preceding discharge timing portion of the pulsating cleaning flow fall off from the inner surface by the discharge pause timing portion and are pushed out (removed) from the bag hole at the subsequent discharge timing portion. It becomes easy to diffuse into the cleaning liquid. Tap water can be used as is for the cleaning solution, but ionic water is used to improve the cleaning effect, a surfactant is mixed, or an alkaline degreasing cleaning solution is used to perform degreasing and cleaning simultaneously. It may be used.

  Here, by setting Q / V to 1 or more, the discharge amount required for each action of lifting, dropping off, and extruding foreign matter and dirt due to the discharge cleaning liquid is supplied for each shot (discharge timing portion). The cycle time of the cleaning process can be shortened and the occurrence of cleaning defects can be prevented. When Q / V is less than 1, the discharge amount necessary for the above-mentioned three actions by the discharge cleaning liquid, particularly the pushing-out action of foreign matter, dirt, etc., is insufficiently supplied, and foreign matter, dirt, etc. remain in the bag hole for cleaning. There is a risk that defects and the like are likely to occur. Further, in order to prevent the occurrence of poor cleaning and the like, it is more desirable to set 1.5 ≦ Q / V [however, when Vn = 0, 1.5 ≦ Q / Vh].

  By the way, when cleaning the inner surface of the bag hole with the bag hole and the spray nozzle immersed in the cleaning liquid and facing the spray nozzle (pulsating cleaning flow) facing upward with the opening of the bag hole facing downward, Either of these two types may be adopted.

(1) When jetting a pulsating cleaning flow from the spray nozzle (tip) with the spray nozzle and the bag hole (object to be cleaned) fixed to the cleaning tank: for movement during cleaning A mechanism is not required, and a small, compact and simple configuration can be achieved.

(2) When jetting a pulsating cleaning flow from the injection nozzle (tip) while moving at least one of the injection nozzle and the bag hole (object to be cleaned): injection according to the shape of the bag hole Since the nozzle and / or the bag hole is moved, and thereby the inner surface injection position of the bag hole by the injection nozzle is relatively changed, it is possible to cope with a complicated sectional shape of the bag hole. The moving direction includes linear movement in the axial direction or radial direction and rotational movement (movement in the circumferential direction) around the axial line.

  In addition, the following method may be used for cleaning the through hole according to the present invention. That is, one opening of the through hole is closed with a plug (plug) to form a bag-hole-like space, and the plug and the tip of the injection nozzle are moved while maintaining a predetermined interval inside the through hole. By injecting the pulsating cleaning flow from the injection nozzle (the tip thereof), the inner peripheral surface of the through hole can be cleaned under the same conditions as the bag hole. The moving direction at this time is preferably the same direction (for example, the axial direction).

  At the tip portion of the injection nozzle, a jet outlet is formed on each of the tip surface and the peripheral surface, and the former can be used for cleaning the bottom surface of the bag hole and the latter can be used for cleaning the inner peripheral surface of the bag hole. And if a pulsating washing | cleaning flow is selectively injected from these jet nozzles, it can use properly in the state which maintained washing | cleaning performance. In addition, by forming a plurality of outlets on the peripheral surface along the circumferential direction, there may be a case where the same cleaning effect as when the spray nozzle is rotated around the axis may be obtained. Furthermore, you may form a some jet nozzle in the injection nozzle used in the case of said (2). Or the front-end | tip of an injection nozzle can be bent and the internal peripheral surface of a bag hole can also be wash | cleaned at a front-end | tip jet outlet.

(Example 1)
Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. FIG. 1 is a schematic side view showing an example of a cleaning apparatus according to the present invention, and FIG. 2 is a front partial sectional view of a main part thereof. As shown in FIG. 1, the cleaning apparatus 100 mainly includes a cleaning tank 10 that stores a cleaning liquid L, a cleaning flow generation unit 20 that generates a pulsating cleaning flow described later, and a bag hole H of a workpiece W (object to be cleaned). To be removed D from foreign matter (chips such as chips and buff powder, degreased and washed debris), dirt (cutting oil during processing, grease for rust prevention, etc.), etc. (hereinafter simply referred to as dirt; see Fig. 2) And a work moving part 40 that can move in a three-dimensional direction while holding the work W by an air chuck 41 (gripping member). The cleaning liquid L used here is a mixture of ionic water and a surfactant.

  The cleaning tank 10 has a first partition plate 11 (partition wall) in the vertical direction whose lower end is fixed in contact with the bottom wall 101 of the cleaning tank 10 and whose upper end is fixed to be separated from the top wall 102 of the cleaning tank 10, and a lower end A vertical partitioning second partition plate 12 (partitioning wall) that is fixed at a distance from the bottom wall 101 and the top wall 102 is provided upright. The upper end of the second partition plate 12 is set higher than the upper end of the first partition plate 11. The cleaning tank 10 is divided into three tanks 13, 14, and 15 by these partition plates 11 and 12. In the first tank 13 in which the work W is cleaned by the spray nozzle 30, the removed dirt includes dirt D1 that settles on the bottom wall 101 and dirt D2 that floats on the water surface.

  Therefore, the floating dirt D2 in the first tank 13 overflows the first partition plate 11 from the first tank 13, and flows into the second tank 14 (floating matter storage tank) adjacent thereto. In the second tank 14, the floating dirt D <b> 2 is normally blocked by the second partition plate 12 and captured and stored, and does not flow into the third tank 15 (cleaning liquid extraction tank). Even if the floating dirt D <b> 2 flows into the third tank 15 through the gap 103 (bottom opening) between the lower end of the second partition plate 12 and the bottom wall 101, the water intake 16 to the cleaning flow generation unit 20. Since the (cleaning liquid outlet) is provided at a position higher than the drain 104 and the gap 103 of the bottom wall 101, the dirt D2 is less likely to be mixed into the circulating water to the cleaning flow generating unit 20. In addition, 17 is a water supply hose that connects the water intake 16 and the water supply port 24 of the cleaning flow generator 20, and 18 is an injection hose that connects the water outlet 25 of the cleaning flow generator 20 and the injection nozzle 30.

  An uncleaned work table 42 on which an uncleaned (before cleaning) work W is placed is placed so as to be immersed in the stored cleaning liquid L in the first tank 13 together with the work W. The uncleaned work table 42 is provided at the standby position X2 before cleaning, and the cleaning liquid L is heated to a predetermined temperature in order to easily remove the dirt D adhering to the bag hole H of the uncleaned work W ( It is provided in the vicinity of the heater 43 for heating. On the other hand, a cleaned work table 44 on which the cleaned (washed) work W is placed is installed outside the cleaning tank 10 in the storage position Z2 after cleaning. Reference numeral 105 denotes a suction duct for sucking and discharging water vapor (steam) of the cleaning liquid L heated by the heater 43.

  FIG. 3 shows an outline of the cleaning flow generation unit 20. In the cleaning flow generation unit 20, the rotation of the electric motor 21 is converted into the reciprocating linear motion of the piston 23a of the reciprocating pump 23 (piston pump) via the piston crank mechanism 22 (reciprocating slider crank mechanism). Accordingly, the cylinder 23b of the reciprocating pump 23 causes the cleaning liquid L that naturally falls from the water supply port 24 to be discharged from the water outlet 25 at the same pulsation number (pulse number; for example, 1500 pulses / minute) as the rotation speed of the electric motor 21 (for example, 1500 rpm). A pulsating cleaning flow P is discharged. That is, the cleaning flow generation unit 20 (reciprocating pump 23) generates a pulsating cleaning flow P that alternately repeats a discharge timing portion P1 for discharging the cleaning liquid L and a discharge stop timing portion P2 for stopping the discharge of the cleaning liquid L at high speed. Is done. Note that “discharge amount Q per shot of one injection nozzle” to be described later is substantially equal (ignoring a loss in the middle of the path) when there is one injection nozzle 30 connected to the reciprocating pump 23. It is comparable to the volume discharged at the timing portion P1, and can be regarded as the volume of the cylinder 23b.

  As shown in FIG. 2, such a cleaning flow generation unit 20 is connected to the cleaning tank 10 in parallel (for example, triple) in parallel, and spray nozzles 30, 30, 30 are connected to each. In a state where a plurality of (for example, three) bag holes H of the workpiece W and each spray nozzle 30 are both immersed in the cleaning liquid L, the axis O2 of the spray nozzle 30 is aligned with the vertical axis O1 of the bag hole H. (E.g., matching). The workpiece W is held by a gripping member 41 which will be described later so that the bag hole H is opened downward (for example, vertically downward) during cleaning and the whole is immersed in the cleaning liquid L. Further, the injection nozzle 30 is fixed to the cleaning tank 10 with the outlet 31 formed at the tip thereof facing the bag hole H upward (for example, upward in the vertical direction (axis O2 direction)). The tip position of the injection nozzle 30 is set lower than the water surface of the cleaning liquid L by a predetermined distance.

  And the injection nozzle 30 injects the pulsating washing | cleaning flow P produced | generated by the washing | cleaning flow production | generation part 20 upwards with the predetermined | prescribed injection pressure toward the inner surface of the bag hole H from the jet nozzle 31 of a front-end | tip part, and works W The dirt D remaining on and adhered to the inner surface of the bag hole H is removed. Further, the tip of the injection nozzle 30 has a gap S for entering the bag hole H and for discharging the dirt D between the inner surface of the bag hole H. In this way, the pulsation cleaning flow P is jetted upward from the jet nozzle 31 of the jet nozzle 30, and the gap S is formed between the inner surface of the bag hole H and the tip of the jet nozzle 30. Easy to drop off and easy to remove.

  This gap S includes a gap S1 between the tip end portion (upper end surface) of the injection nozzle 30 and the bottom surface of the bag hole H, and a gap S2 between the tip portion (outer peripheral surface) of the injection nozzle 30 and the inner peripheral surface of the bag hole H. Is included. The gap S1 is mainly involved in the action of lifting and dropping (or peeling) dirt D from the inner surface (bottom surface and inner peripheral surface) of the bag hole H, and the gap S2 is mainly used for the inner surface (bottom surface and inner surface) of the bag hole H. It is involved in the action of pushing out the dirt D from the peripheral surface.

  In FIG. 2, when the gap between the tip of the injection nozzle 30 and the bottom surface of the bag hole H is S1, and the inner diameter of the injection nozzle 30 is d1, 0.1 ≦ S1 / d1 ≦ 10 is set. The action of lifting, dropping off, and extruding the dirt D on the inner surface of the bag hole H due to is facilitated. When S1 / d1 is less than 0.1, the distance between the injection nozzle 30 and the bottom surface becomes small and the spread of the shot becomes small. . On the other hand, when S1 / d1 is greater than 10, the distance between the injection nozzle 30 and the bottom surface becomes large, and the cleaning power on the bottom surface is reduced, which may easily cause defective cleaning.

  Further, when the clearance between the outer peripheral surface of the injection nozzle 30 and the inner peripheral surface of the bag hole H is S2, and the outer diameter of the injection nozzle 30 is d2, by setting 0.1 ≦ S2 / d2 ≦ 10, The action of pushing out (flowing out) the dirt D on the inner surface of the bag hole H by the discharge cleaning liquid from the spray nozzle 30 is facilitated. In addition, when S2 / d2 is less than 0.1, the space | interval of the outer peripheral surface of the injection nozzle 30 and the inner peripheral surface of the bag hole H becomes small, and there exists a possibility that the fallen dirt D may adhere again or will be clogged. is there. On the other hand, when S2 / d2 is greater than 10, the distance between the outer peripheral surface of the injection nozzle 30 and the inner peripheral surface of the bag hole H increases, and the amount of cleaning liquid flowing into the bag hole H from the outside pushes out the dirt D. This may cause the extrusion action to be insufficient.

  As shown in FIG. 1, the workpiece moving unit 40 can move in a three-dimensional direction while holding the workpiece W with an air chuck 41. Accordingly, the work W is held by the air chuck 41 (work moving unit 40), and the cleaning position Y2 disposed opposite to the spray nozzle 30 in the stored cleaning liquid L in the cleaning tank 10 and the uncleaned work base 42 (standby position X2). ) And the cleaned work table 44 (storage position Z2).

  The cleaning flow generator 20 is operated in a predetermined range while the workpiece W is replaced, and the pulsating cleaning flow P is sprayed from the spray nozzle 30 into the stored cleaning liquid L in the cleaning tank 10 and removed from the bag hole H. The floating dirt D2 is diffused and moved so as not to reattach to the unwashed workpiece W.

  Specifically, the period during which the cleaning flow generation unit 20 is operated is during the period when the cleaned workpiece W is moved from the cleaning position Y2 to the storage position Z2, and when the uncleaned workpiece W is moved to the standby position X2 (or standby upper position X1). ) To the cleaning position Y2 is a predetermined period (diffusion injection period) of the workpiece replacement period (object replacement period; see S7 to S12 and S1 to S5 in FIG. 7). In FIG. 1, the diffusion injection period is set from the standby upper position X1 (position above the liquid level of the standby position X2) to the cleaning upper position Y1 (position above the liquid level of the cleaning device Y2) (FIG. 1). 7 S1-S4). At this time, the pulsating cleaning flow P jetted upward from the spray nozzle 30 toward the liquid level blows up to a level higher than the liquid level of the stored cleaning liquid L. As described above, the upward spraying of the pulsating cleaning flow P toward the liquid surface causes the floating dirt D2 to diffuse and move, and overflows the first partition plate 11 and easily flows into the second tank 14. Further, since the stored cleaning liquid L in the cleaning tank 10 is agitated by the upward jetting of the pulsating cleaning flow P toward the liquid surface, and the liquid temperature is made uniform, temperature management is also facilitated. Reference numeral 106 denotes an observation window for confirming the situation.

  Here, during the work replacement period, the cleaning flow generating unit is used while the cleaned work W is moved from the cleaning position Y2 to the storage position Z2 and during the air chuck 41 is moved from the storage position Z2 to the standby upper position X1. 20 is stopped (see S7 to S12 in FIG. 7). As a result, a part of the dirt D removed from the bag hole H is precipitated at the bottom of the washing tank 10 as the precipitated dirt D1.

  Further, the cleaning flow generating unit is used when the unwashed workpiece W is moved from the standby position X2 (or the standby upper position X1) to the cleaning position Y2 when the workpiece W is moved from the cleaning upper position Y1 to the cleaning position Y2. 20 is stopped (see S5 in FIG. 7). As a result, when the cleaning upper position Y1 is set to the cleaning position Y2, the pulsation cleaning flow P is not injected from the injection nozzle 30 to the bag hole H, so that the gripping position and the gripping posture of the air chuck 41 are not easily displaced. (See FIG. 2).

Here, the behavior of the cleaning state will be described with reference to FIG.
(1) First, the bag hole H of the workpiece W is set above the injection nozzle 30, and at the initial stage when the pulsating cleaning flow P starts to be injected from the injection port 31 of the injection nozzle 30, the inner space of the bag hole H Mostly filled with air. Owing to the spray pressure (discharge timing portion P1) of the pulsating cleaning flow P, dirt (for example, relatively large dirt) D ′ that is easily lifted and peeled off starts to drop (FIG. 4A).
(2) Due to the continuous injection of the pulsating cleaning flow P, the internal space of the bag hole H is gradually filled with the cleaning liquid L. Further, for example, at the discharge suspension timing portion P2 of the pulsating cleaning flow P, the dirt D ′ drops off from the inner surface of the bag hole H (FIG. 4B).
(3) The dropped dirt D ′ is pushed out from the gap S at a stroke by the discharge timing portion P1 of the subsequent pulsating cleaning flow P. Further, the removal of dirt (for example, relatively small dirt) D ″ that is difficult to lift and peel off begins (FIG. 4C). Also, the internal space of the bag hole H is completely filled with the cleaning liquid L.
(4) Further, for example, due to the discharge timing portion P2 of the pulsating cleaning flow P, the dirt D ″ is dropped from the inner surface of the bag hole H (FIG. 4D).

As shown in FIG. 5, when the actual volume of the bag hole obtained by subtracting the total volume Vn of the injection nozzle 30 from the total volume Vh of the bag hole H is V, and the discharge amount per shot of the injection nozzle 30 is Q When 1 ≦ Q / V = Q / (Vh−Vn), the dirt D floating from the inner surface of the bag hole H in the preceding discharge timing portion P1 of the pulsating cleaning flow P is changed to the inner surface by the discharge suspension timing portion P2. It becomes easy to drop off. Further, the dropped dirt D is pushed out (removed) from the bag hole H at the subsequent discharge timing portion P1 and easily diffuses into the cleaning liquid L, so that the occurrence of poor cleaning is prevented. Note that if the inrush length of the injection nozzle 30 is Ln, Vn = π · d2 ² · Ln / 4. Further, when the injection nozzle 30 is disposed outside the bag hole H, Vn = 0 (V = Vh), and therefore, 1 ≦ Q / Vh is set.

  By disposing the bag hole H and the injection nozzle 30 as shown in FIG. 6, the discharged cleaning liquid smoothly flows out of the bag hole H due to the discharge pressure of the cleaning flow generation unit 20 (reciprocating pump 23). It is possible to avoid placing a burden on the generation unit 20 (reciprocating pump 23).

(1) In the case where the injection nozzle 30 (ejection port 31) is inserted and disposed inside the bag hole H In FIG. 6A, the total cross sectional area An of the injection nozzle 30 is removed from the total cross sectional area Ah of the bag hole H. When the actual cross-sectional area of the bag hole H is A and the cross-sectional area of the jet nozzle 30 (spout port 31) is As, 1 ≦ A / As = (Ah−An) / As can be set. However, A, Ah, An, and As show each cross-sectional area on a cross section (for example, cross section orthogonal to each axis line) mutually parallel. By setting A / As to be 1 or more, the cleaning liquid discharged from the injection nozzle 30 (jet port 31) is discharged from the bag hole H between the inner peripheral surface of the bag hole H and the outer peripheral surface of the injection nozzle 30. For this purpose, a gap K (corresponding to the aforementioned gap S2 described above) can be formed. Moreover, since the gap K (actual cross-sectional area A of the bag hole H) is larger than the cross-sectional area As of the ejection port, the discharge cleaning liquid flows out smoothly from the bag hole H, and an excessive burden is placed on the cleaning flow generation unit 20 ( (Load) is not applied. In particular, when the pulsating cleaning flow P by the reciprocating pump 23 is used, after the flow (outflow) of the discharge cleaning liquid is decelerated (stagnation) at the discharge stop timing portion P2 (see FIG. 3), the inertia of the stationary cleaning liquid in the bag hole H When the cleaning liquid is discharged at the subsequent discharge timing portion P1 (see FIG. 3), the load on the reciprocating pump 23 can be reduced. When A / As is less than 1, such a gap K cannot be formed sufficiently, and the discharge cleaning liquid cannot smoothly flow out from the bag hole H, or the cleaning flow generation unit 20 (reciprocating pump 23) can be prevented. An excessive load may be applied. Further, in order to sufficiently secure the gap K and reduce the burden on the cleaning flow generation unit 20 (reciprocating pump 23), it is more desirable to set 1.5 ≦ A / As.

(2) In the case where the injection nozzle 30 (spout port 31) is disposed outside the bag hole H On the other hand, in the case of FIG. 6B, the tip of the injection nozzle 30 cannot enter the bag hole H. The inner peripheral surface of the injection nozzle 30 is located inside the bag hole H. In FIG. 6B, the discharge cleaning liquid discharge space formed by the opening of the bag hole H (the opening length, that is, the peripheral length is Lh) along the gap K with the tip of the injection nozzle 30 (the jet outlet 31). 1 is set to 1 ≦ Ak / As = Lh · K / As, where Ak is the circumferential area of the nozzle and As is the cross-sectional area of the jet nozzle 30 (spout port 31). However, Lh = πd when the bag hole H has a circular cross section with a diameter d, and Lh = 4 Wh when the bag hole H has a square cross section with a side length Wh. By setting Ak / As to 1 or more, the cleaning liquid discharged from the injection nozzle 30 (spout port 31) is allowed to flow between the opening of the bag hole H and the tip of the spray nozzle 30 (spout port 31). It is possible to form a gap K for discharging from the air. Moreover, since the gap K (circumferential area Ak of the discharge cleaning liquid discharge space) is larger than the jet outlet cross-sectional area As, the discharge cleaning liquid smoothly flows out from the bag hole H, and the cleaning flow generation unit 20 (reciprocating pump 23). Is not overburdened. In particular, when the pulsating cleaning flow P by the reciprocating pump 23 is used, after the flow (outflow) of the discharge cleaning liquid is decelerated (stagnation) at the discharge stop timing portion P2 (see FIG. 3), the inertia of the stationary cleaning liquid in the bag hole H When the cleaning liquid is discharged at the subsequent discharge timing portion P1 (see FIG. 3), the load on the reciprocating pump 23 can be reduced. In addition, when Ak / As is less than 1, such a gap K cannot be formed sufficiently, and the discharge cleaning liquid cannot smoothly flow out from the bag hole H, or the cleaning flow generation unit 20 (reciprocating pump 23) can be prevented. An excessive load may be applied. Further, in order to sufficiently secure the gap K and reduce the burden on the cleaning flow generation unit 20 (reciprocating pump 23), it is more desirable to set 1.5 ≦ Ak / As.

FIG. 7 shows a work process diagram of the cleaning apparatus 100 described above, and a description will be given with reference to FIG.
S1: The air chuck 41 is lowered from the standby upper position X1 (position above the liquid level of the standby position X2) to the standby position X2. At this time, the cleaning flow generation unit 20 is operated, and the pulsating cleaning flow P is sprayed from the injection nozzle 30 into the stored cleaning liquid L in the cleaning tank 10, and the floating dirt D2 removed from the bag hole H is removed from the unwashed work W. It diffuses and moves so that it does not re-adhere to it (diffusion injection period starts).
S2: The air chuck 41 is closed at the standby position X2, and the unwashed workpiece W is gripped.
S3: The air chuck 41 is raised from the standby position X2 to the standby upper position X1.
S4: The air chuck 41 is moved from the standby upper position X1 to the cleaning upper position Y1 (position above the liquid level at the cleaning position Y2). The operation of the cleaning flow generation unit 20 is stopped, and the diffusion injection from the injection nozzle 30 is ended (the diffusion injection period ends).

S5: The air chuck 41 is lowered from the cleaning upper position Y1 to the cleaning position Y2.
S6: The cleaning flow generation unit 20 is operated at the cleaning position Y2, and after the dirt D is removed from the inner surface of the bag hole H by the pulsating cleaning flow P from the injection nozzle 30, the operation of the cleaning flow generation unit 20 is stopped. (Washing process).
S7: The air chuck 41 is raised from the cleaning position Y2 to the cleaning upper position Y1.
S8: The air chuck 41 is moved from the cleaning upper position Y1 to the storage upper position Z1 (position above the storage position Z2).

S9: The air chuck 41 is lowered from the storage upper position Z1 to the storage position Z2.
S10: The air chuck 41 is opened at the storage position Z2, and the cleaned workpiece W is released.
S11: The air chuck 41 is raised from the storage position Z2 to the storage upper position Z1.
S12: The air chuck 41 is moved from the storage upper position Z1 to the standby upper position X1.

  When the cleaning step (S6) is stopped, the cleaning flow generation unit 20 is operated at predetermined intervals, and the pulsating cleaning flow P is injected from the injection nozzle 30 into the stored cleaning liquid L in the cleaning tank 10 for a predetermined time (see FIG. 1). ). Thereafter, the operation of the cleaning flow generator 20 is temporarily stopped. As described above, the upward spraying of the pulsating cleaning flow P toward the liquid surface causes the floating dirt D2 to diffuse and move, and overflows the first partition plate 11 and easily flows into the second tank 14. Further, since the stored cleaning liquid L in the cleaning tank 10 is agitated by the upward jetting of the pulsating cleaning flow P toward the liquid surface, and the liquid temperature is made uniform, temperature management is also facilitated.

(Example 2)
As shown in FIG. 8, a plurality of (for example, two) injection nozzles 30 can be arranged for one bag hole H. In this case, a plurality of injection nozzles 30 may be arranged opposite to each other in a direction intersecting the axis O1 of the bag hole H (for example, an orthogonal direction; a radial direction of the bag hole H). Further, each injection nozzle 30 is moved in a direction intersecting with the axis O1 of the bag hole H (for example, an orthogonal direction; the radial direction of the bag hole H), and the bag hole is formed from the outlet 31 formed at the tip of each injection nozzle 30. The injection position of the pulsating cleaning flow P to H may be changed. Furthermore, a rotational motion around the axis O2 can be added to the injection nozzle 30 to rotate and spray the pulsating cleaning flow P like a sprinkler.

(Example 3)
In the above description, only the bag hole has been described, but there may be a case where the through hole can be implemented in substantially the same manner. A through hole H ′ is formed in the workpiece W shown in FIG. 9, but the other side (for example, downward) is formed by closing the opening on one side (for example, the upper side) of the through hole H ′ with a plug 32 (plug). It is possible to form a bag-hole-like space that opens to the top. Therefore, the tip of the injection nozzle 30 and the plug 32 are moved in the same direction (for example, upward along the common axes O1 and O2) while maintaining a predetermined interval S1 inside the through hole H ′. At this time, the inner peripheral surface of the through hole H ′ can be cleaned by spraying the pulsating cleaning flow P from the tip of the spray nozzle 30.

  The tip of the injection nozzle 30 shown in FIG. 9 has a tip outlet 31 a formed on the tip surface (top surface) of the injection nozzle 30 and a plurality (for example, four) of nozzles 30 formed on the outer peripheral surface of the injection nozzle 30. An outer peripheral outlet 31b is provided. When the through hole H ′ (bag hole-shaped space) is a square hole (for example, a square hole) as shown in FIG. 9B, the outer peripheral ejection ports 31 b are directed to the respective corners. It becomes easy to remove the dirt D adhering to the part.

(Modification)
FIG. 10 shows various modifications of the injection nozzle. When a plurality of (for example, three) bag holes H are provided as shown in FIG. 10A, the pulsating cleaning flow P supplied from a single cleaning flow generation unit 20 is branched to each bag hole H. You may distribute to the injection nozzle 30 (jet outlet 31) arrange | positioned facing. In that case, when there are two bag holes H, the injection nozzle 30 can be formed in a Y shape as shown in FIG.

  When the bag hole H has a space surrounded by a curved surface (for example, a semicircle) dome as shown in FIG. 10 (c), the tip of the injection nozzle 30 is formed into a curved surface (for example, a semicircle), A plurality of (for example, five) different ejection ports 31c can be formed. As a result, the pulsating cleaning flow P can be sprayed from the tip of the spray nozzle 30 along the dome shape of the bag hole H, and the dirt D can be easily removed. If the rotational movement around the axis O2 is further added to the injection nozzle 30 and the pulsating cleaning flow P is rotationally injected like a sprinkler, the removal of the dirt D becomes easier.

  In the second embodiment, the third embodiment, and other modifications, portions having the same functions as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

The side view which shows an example of the washing | cleaning apparatus which concerns on this invention. The front fragmentary sectional view of the principal part of FIG. Explanatory drawing of a washing | cleaning flow production | generation part. Explanatory drawing which shows the behavior of a washing | cleaning state. Explanatory drawing which shows the arrangement | positioning relationship between a bag hole and an injection nozzle. Explanatory drawing which shows the other arrangement | positioning relationship between a bag hole and an injection nozzle. Work process diagram. The front fragmentary sectional view which shows the other example of the washing | cleaning apparatus which concerns on this invention. The front fragmentary sectional view and principal part plane sectional drawing which show the further another example of the washing | cleaning apparatus which concerns on this invention. Explanatory drawing which shows the modification of an injection nozzle.

Explanation of symbols

10 Washing tank 11 First partition plate (partition wall)
12 Second partition (partition wall)
14 Second tank (Float storage tank)
15 3rd tank (cleaning liquid extraction tank)
20 Washing Flow Generation Unit 30 Injection Nozzle 31 Outlet 32 Plug
40 Work moving part 100 Cleaning device D Dirt H Bag hole H 'Through hole (bag hole-shaped space)
L Cleaning liquid P Pulsating cleaning flow P1 Discharge timing part P2 Discharge stop timing part S Clearance W Workpiece (object to be cleaned)

Claims (6)

A cleaning device for cleaning an inner surface of a bag hole or a bag hole-like space formed in an object to be cleaned (hereinafter referred to as a bag hole),
A cleaning flow generator for generating a pulsating cleaning flow;
At least in the state immersed in the cleaning solution together with the bag hole, the pulsating cleaning flow generated by the cleaning flow generation unit is jetted upward toward the inner surface of the bag hole that opens downward, and remains in the bag hole.・ A spray nozzle that removes foreign matter such as attached processing waste and removal targets such as dirt,
A cleaning apparatus comprising: A cleaning device for cleaning an inner surface of a bag hole or a bag hole-like space formed in an object to be cleaned (hereinafter referred to as a bag hole),
A cleaning flow generator for generating a pulsating cleaning flow;
At least in the state immersed in the cleaning solution together with the bag hole, the pulsating cleaning flow generated by the cleaning flow generation unit is jetted upward toward the inner surface of the bag hole that opens downward, and remains in the bag hole.・ A plurality of spray nozzles that remove foreign matter such as attached processing waste, dirt, etc., and
A cleaning apparatus comprising:   The tip portion of the spray nozzle enters the inside of the bag hole and has a gap for discharging the removal object between the inner surface of the bag hole and toward the inner surface of the bag hole. The cleaning device according to claim 1, wherein a pulsating cleaning flow can be injected. The cleaning flow generation unit is composed of a reciprocating pump that generates the pulsating cleaning flow by alternately repeating a discharge timing part for discharging the cleaning liquid and a discharge pause timing part for stopping the discharge of the cleaning liquid,
When the actual volume of the bag hole obtained by subtracting the entire volume Vn of the injection nozzle from the total volume Vh of the bag hole is V, and the discharge amount per shot of the spray nozzle is Q,
1 ≦ Q / V = Q / (Vh−Vn)
[However, when Vn = 0, 1 ≦ Q / Vh]
The cleaning apparatus according to any one of claims 1 to 3, wherein A cleaning method using the cleaning device according to any one of claims 1 to 4,
A cleaning method, wherein at least one of the spray nozzle and the object to be cleaned is moved, and the removal target is removed by changing an inner surface spray position of the bag hole by the spray nozzle. The bag hole is formed in a bag hole-like space in which one opening of the through hole is closed by a stopper,
The inner peripheral surface of the through hole can be cleaned by injecting the pulsating cleaning flow from the injection nozzle while moving the tip of the injection nozzle and the stopper while maintaining a predetermined distance inside the through hole. The cleaning method according to claim 5.