TWI660450B - Cyclone forming body and suction device - Google Patents

Abstract

The swirling flow forming body (3) of the present invention includes a main body (31), a first end surface (33) formed on the main body (31) facing the object to be attracted, and a hole opening in the first end surface (33) (32) a discharge port (35) formed in a peripheral surface (311) of the body (31) facing the hole (32); and a fluid ejected from the discharge port (35) toward the hole (32) to form a swirling flow This generates a fluid passage (37) for attracting the attracted object by the negative pressure, and the inner peripheral surface (311) is formed to guide the fluid ejected from the discharge port (35) toward the direction away from the object to be attracted and to be discharged from the hole (32). .

Description

Cyclone forming body and suction device

[0001] The present invention relates to a swirling flow forming body that generates a vacuum suction member by forming a swirling flow.

[0002] In recent years, an apparatus for transporting a plate-shaped member such as a semiconductor wafer or a glass substrate without contact has been used. For example, Patent Document 1 describes an apparatus for carrying a plate-shaped member in a non-contact manner by using the Bernoulli effect. The device generates a swirling flow in a cylindrical chamber opened below the device and attracts the plate-like member by the negative pressure of the central portion of the swirling flow, and on the other hand, the device and the plate-like member can flow through the fluid flowing from the cylindrical chamber. The non-contact conveyance of the plate member is performed while maintaining a certain distance therebetween. [Prior Art Document] [Patent Document] [0003] [Patent Document 1] JP-A-2005-51260

[Summary of the Invention] [Problems to be Solved by the Invention] [0004] The present invention provides a swirling flow forming body that ejects a fluid from a discharge port toward a hole to form a swirling flow, thereby generating a swirling flow of a vacuum suction attraction. The body is intended to more stably attract the swirling flow forming body of the attracted object when the fluid ejected from the discharge port is guided in the direction of the object to be attracted. [Means for Solving the Problem] In order to solve the above problems, the present invention provides a swirling flow forming body including: a main body; a first end surface formed on the main body and facing the object to be attracted; and the first end surface a hole through which an opening is formed in a peripheral surface of the main body facing the hole; and a first fluid passage through which a fluid is ejected from the discharge port toward the hole to form a swirling flow to generate a negative pressure to attract the object to be attracted The inner peripheral surface is formed to guide the fluid discharged from the discharge port to be discharged from the hole in a direction away from the object to be attracted. In a preferred embodiment, at least a portion of the inner peripheral surface is formed such that a cross-sectional area of the hole expands away from the object to be attracted. [0007] In a preferred embodiment, the hole is a through hole that is opened at the first end surface and that is open at a second end surface opposite to the first end surface, and the inner peripheral surface is formed to be ejected from the discharge port. The fluid is guided toward the opening of the second end surface. In a preferred embodiment, the inner peripheral surface is an opening that extends from the opening of the first end surface across the second end surface, and the cross-sectional area of the hole is gradually increased as it goes away from the object to be attracted. In a more preferred aspect, the edge of the opening of the second end surface is chamfered. [0010] In a further preferred aspect, the plate body further includes: the plate body is disposed to face the second end surface, and a fluid flow from the hole is formed between the second end surface and the plate body A retaining member for the flow path. In a more preferred aspect, the holding member is configured to keep the plate body swingable in a through direction of the through hole. [0012] In another preferred aspect, the present invention further includes: an outflow port formed on the inner peripheral surface at a position farther from the object to be attracted than the discharge port; and a discharge port formed on an outer side surface of the main body; The second fluid passage that discharges the fluid flowing into the outlet from the outlet is configured such that the inner peripheral surface guides the fluid discharged from the discharge port toward the outlet. [0013] In another preferred embodiment, the first fluid passage is formed such that a fluid discharged from the discharge port flows in a direction away from the object to be attracted. Further, the present invention provides a swirling flow forming body comprising: a main body; a first end surface formed on the main body and facing the object to be attracted; a hole opened in the first end surface; and a hole facing the hole a discharge port of the inner peripheral surface of the main body; and a first fluid passage through which a fluid flows from the discharge port toward the hole to form a swirling flow to generate a negative pressure to suck the object to be attracted, and the first fluid passage is formed from the spray The fluid ejected from the outlet flows toward the direction away from the object to be attracted, and is discharged from the hole. Further, the present invention provides a suction device comprising: a base body; and a swirling flow formation body provided in one or more of any one of the above-described base materials. [Effect of the Invention] According to the present invention, it is possible to provide a swirling flow forming body that sprays a fluid from a discharge port toward a hole to form a swirling flow, thereby generating a swirling flow forming body that suctions the attracted object by a vacuum, and a discharge flow from the discharge port. When the ejected fluid is directed toward the direction of the object to be attracted, the swirling flow forming body of the object to be attracted can be more stably attracted.

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1. Embodiment FIG. 1 is a perspective view showing an example of a top surface of a suction device 1 according to an embodiment of the present invention. Fig. 2 is a perspective view showing an example of the lower surface of the suction device 1. Fig. 3 is a cross-sectional view taken along line I-I of Fig. 1. The suction device 1 is suitable for a device that sucks and holds a plate-shaped member such as a food material. The suction device 1 includes a substrate 2 having a disk-shaped base body, six swirling flow forming bodies 3 provided with a swirling flow of a fluid on the substrate 2, and a hose extending from a fluid supply pump (not shown). The plurality of fluid joints 4 of the swirling flow forming body 3 are formed. [0019] In the substrate 2, six through holes having a substantially circular cross section are formed at equal intervals along the periphery, and the swirling flow forming body 3 is fitted into each of the through holes. At this time, the swirling flow forming body 3 is fitted into the through hole so that the main body 31 is exposed on the upper surface side of the substrate 2 and the cover 38 is exposed on the lower surface side of the substrate 2. The swirling flow forming body 3 is disposed in the substrate 2 such that the swirling flow is formed in a clockwise direction and a counterclockwise direction is different from each other. Further, the fluid here is specifically a gas such as compressed air or a liquid such as pure water or carbonated water. 4 is a perspective view showing an example of the lower surface of the swirling flow forming body 3. Fig. 5 is a perspective view showing an example of the upper surface of the swirling flow forming body 3. Fig. 6 is a sectional view taken along line II-II of Fig. 5. The swirling flow forming body 3 is a device that sucks and holds the plate-shaped member by the Bernoulli effect. The swirling flow forming body 3 has a main body 31 of a substantially annular plate body having a through hole 32 having a circular cross section in the center, and a flat surface formed on the lower surface of the main body 31 so as to face the plate-like member to be attracted. 1 end face 33; a flat second end face 34 formed on the upper surface of the main body 31; two discharge ports 35 formed in the inner peripheral surface 311 of the main body 31 facing the through hole 32; and a peripheral surface 312 formed on the main body 31 Two supply ports 36; two linear fluid passages 37 communicating the discharge port 35 and the supply port 36; a substantially disk-shaped cover 38; and the cover 38 being held substantially parallel to the second end face 34 The four spacers 39 of the retaining member. [0021] The periphery of the cross section substantially perpendicular to the central axis of the main body 31 has a shape in which a portion of the opposite outer periphery is cut into a linear shape. The inner peripheral surface 311 of the main body 31 is formed such that the fluid ejected from the discharge port 35 is guided in a direction away from the object to be attracted and discharged from the through hole 32. More specifically, it is formed to be guided toward the opening of the second end surface 34 and discharged from the through hole 32. Specifically, the area of the cross section of the inner peripheral surface 311 which is substantially perpendicular to the central axis of the main body 31 is formed such that the diameter gradually increases as the opening from the first end surface 33 extends across the opening of the second end surface 34. That is, it forms a tapered shape. [0022] The through hole 32 is formed to extend linearly in the direction of the central axis of the main body 31. The through hole 32 is opened at the first end surface 33 and opened at the second end surface 34. [0023] The first end surface 33 and the second end surface 34 are formed substantially perpendicular to the central axis of the main body 31. [0024] The two discharge ports 35 are formed at the center in the central axis direction of the main body 31 on the inner peripheral surface 311. It is formed in a point symmetrical manner with respect to the central axis of the main body 31. The two supply ports 36 are formed at the center of the central axis direction of the main body 31 at the outer peripheral surface 312. It is formed in a point symmetrical manner with respect to the central axis of the main body 31. And connected to each fluid joint 4. [0025] The two fluid passages 37 are formed to extend in a tangential direction with respect to the inner circumference of the main body 31. Also formed to extend substantially parallel to each other. And formed to extend substantially perpendicular to the central axis of the body 31. And formed in the front diameter reduction of each discharge port 35. The two fluid passages 37 discharge the fluid from the discharge port 35 into the through hole 32. The fluid ejected into the through hole 32 flows along the inner peripheral surface of the main body 31 by the Coanda effect, and a swirling flow is formed in the through hole 32. Most of the fluid molecules constituting the swirling flow after the formation flow out from the through hole 32 along the second end face 34 at an angle of about 45 degrees with respect to the direction in which the fluid passage 37 supplying the fluid molecules extends. The swirling flow formed in the through hole 32 generates a negative pressure in the central portion of the through hole 32 by the stationary fluid (entrainment) wound in the central portion of the through hole 32. Thereby, the plate-shaped member which opposes the 1st end surface 33 is attracted by the negative pressure. Further, the angle at which the fluid molecules flow out from the through hole 32 along the second end surface 34 is determined according to the diameter or depth of the through hole 32 and the flow velocity of the fluid, and the above-described angle of about 45 degrees is only an example. The cover 38 has the same shape as the periphery of the cross section substantially perpendicular to the central axis of the main body 31. The cover 38 covers the through hole 32 and restricts the inflow of an external fluid (specifically, a gas or a liquid) toward the through hole 32. [0027] The four spacers 39 each have a cylindrical shape. The four spacers 39 are mounted at equal intervals along the periphery of the second end face 34. At this time, the second end face 34 is attached to the cover 38 so as to extend substantially vertically, and the main body 31 and the cover 38 are coupled. Each spacer 39 is fixed relative to the body 31 and the cover 28, such as by a screw. The four spacers 39 form a flow path for fluid flow from the through hole 32 between the second end face 34 and the cover 38. The fluid passing through this flow path flows out toward the outside of the swirling flow forming body 3. The height of the four spacers 39 (in other words, the slit between the second end face 34 and the cover 38) is set corresponding to the flow rate of the fluid supplied from the fluid supply pump to the swirling flow forming body 3. The four spacers 39 are preferably mounted on the second end face 34 at a position that does not block the flow path of the fluid flowing out from the through hole 32. This is for preventing turbulence caused by the fluid flowing out of the through hole 32 colliding with the spacer 39. The flow path of the fluid flowing out from the through hole 32 is determined according to the diameter or depth of the through hole 32 and the flow velocity of the fluid, but the four spacers 39 are, for example, not mounted at substantially 45 degrees from the direction in which the fluid passage 37 extends. The angle of the line is better. When the fluid is supplied to the swirling flow forming body 3 of the suction device 1 described above through the fluid joint 4, the supplied fluid is ejected from the discharge port 35 toward the through hole 32 through the supply port 36 and the fluid passage 37. The fluid ejected into the through hole 32 is rectified into a swirling flow in the through hole 32. Further, most of the fluid molecules constituting the swirling flow are guided to the inner peripheral surface 311 to flow out from the through hole 32 along the second end surface 34. In this case, when the plate-shaped member is opposed to the first end surface 33, the external fluid (specifically, gas or liquid) is restricted from flowing into the through hole 32, and the swirling flow is caused by the centrifugal force of the swirling flow. The density of fluid molecules per unit volume at the center portion becomes small. That is, a negative pressure is generated at the center of the swirling flow. As a result, the plate-shaped member is pressed by the surrounding fluid and approaches the first end face 33 side. [0029] The swirling flow forming body 3 of the suction device 1 is such that a large portion of the fluid molecules flowing out from the through hole 32 flows out along the second end face 34, so that even if there is a fluid molecule flowing out along the first end face 33 There is only a small amount of existence. Therefore, the phenomenon in which the fluid flowing out along the first end surface 33 collides with the plate-like member to vibrate or rotate the plate-like member is suppressed as compared with the case where the fluid does not flow out from the second end face 34 side. As a result, more stable suction, holding, and transportation of the plate member can be achieved. Further, generation of wrinkles or deformation or defect generation of the plate-shaped member due to vibration (vibration) is suppressed. That is, the suction device 1 can utilize only the attraction force of the swirling flow formed in the swirling flow forming body 3 to be utilized. 2. Modifications The above-described embodiments may be modified as described above. The following modifications can also be combined with each other. 2-1. Modification 1 The shape of the inner peripheral surface 311 of the swirling flow forming body 3 is not limited to the example shown in FIG. Fig. 7 is a vertical cross-sectional view showing an example of the swirling flow forming body 3A in which the edge of the opening of the second end surface 34 is chamfered. In the swirling flow forming body 3A, the edge portion of the opening of the second end surface 34 is chamfered, and the inclined surface 313 is formed at the end portion of the inner peripheral surface 311. The inclined surface 313 guides the fluid ejected from the discharge port 35 in a direction away from the object to be attracted (more specifically, an opening toward the second end surface 34). 8 is a longitudinal cross-sectional view showing an example of the swirling flow forming body 3B after the edge of the opening of the second end surface 34 is rounded. The swirling flow forming body 3B has a rounded surface on the opening edge portion of the second end surface 34 and a curved surface 314 at the end portion of the inner peripheral surface 311. The curved surface 314 guides the fluid ejected from the discharge port 35 toward a direction away from the object to be attracted, more specifically, an opening toward the second end face 34. [ Fig. 9] Fig. 9 is a vertical cross-sectional view showing an example of a swirling flow forming body 3C in which a part of the inner peripheral surface 311 is formed into a non-oblique-conical shape. In the swirling flow forming body 3C, an inner peripheral surface 315 having a non-oblique-conical shape is formed from an opening from the discharge port 35 to the opening of the second end surface 34 to the opening of the second end surface 34. The inner peripheral surface 315 is formed to be substantially parallel to the central axis of the body 31. 10 is a view showing an example of the swirling flow forming body 3D in which the inner peripheral surface 311 of the tapered tapered shape is replaced by the inner peripheral surface 316 having a non-oblique tapered shape, and the edge of the opening of the second end surface 34 is chamfered. Longitudinal section view. The inner peripheral surface 316 of the swirling flow forming body 3D is formed to be substantially parallel to the central axis of the main body 31. The opening edge portion of the second end surface 34 is chamfered and an inclined surface 313 is formed at the end portion of the inner peripheral surface 316. The inclined surface 313 functions as described above. [0035] FIG. 11 is a view showing a swirling flow forming body 3E in which the inner peripheral surface 311 of the tapered tapered shape has an inner peripheral surface 316 having a non-oblique-conical shape, and the edge of the opening of the second end surface 34 is rounded. An example of a longitudinal section. The inner peripheral surface 316 of the swirling flow forming body 3E is formed to be substantially parallel to the central axis of the main body 31. A curved surface is formed on the opening edge portion of the second end surface 34, and a curved surface 314 is formed on the end portion of the inner peripheral surface 316. The surface 314 functions as described above. 2-2. Modification 2 The fluid passage 37 may be formed to be inclined with respect to a direction substantially perpendicular to the central axis of the main body 31. Fig. 12 is a view showing a swirling flow of the fluid passage 37A formed by replacing the inner peripheral surface 311 of the tapered shape to have an inner peripheral surface 316 having a non-oblique tapered shape and having a direction substantially perpendicular to the central axis of the main body 31. A longitudinal sectional view of an example of the formed body 3F. The inner peripheral surface 316 of the swirling flow forming body 3F is formed to be substantially parallel to the central axis of the main body 31. The fluid passage 37A is formed to extend obliquely from the supply port 36 to the discharge port 35 toward the second end face 34 side. As a result, the fluid passage 37A flows the fluid discharged from the discharge port 35 in a direction away from the object to be attracted (more specifically, the opening toward the second end surface 34), and is discharged from the through hole 32. Further, the inner peripheral surface 316 of the swirling flow forming body 3F may be replaced by an inner peripheral surface 311 having a tapered shape. Further, the opening edge portion of the second end surface 34 may be chamfered to form the inclined surface 313, or the opening edge portion of the second end surface 34 may be rounded to form the curved surface 314. 2-3. Modification 3 The spacer 39 may also be omitted instead of forming a groove for discharging a fluid under the cover 38. Fig. 13 is a perspective view showing an example in which the spacer 39 is omitted, and the upper surface of the swirling flow forming body 3G having the cover 38A having the groove 381 formed on the lower surface thereof. Fig. 14 is a sectional view taken along line III-III of Fig. 13. The cover 38A of the swirling flow forming body 3G has a point in which a linear and concave groove 381 is formed at the center of the lower surface, which is different from the above-described cover 38. The groove 381 is formed to extend substantially parallel to the fluid passage 37 when the cover 38A is attached to the main body 31. The cover 38A is fixed to the main body 31 by, for example, a screw lock. When the cover 38A is fixed to the main body 31, the groove 381 is formed between the second end face 34 and the two flow outlets 51 that communicate with the through hole 32, and two discharge ports that are adjacent to the outside of the swirling flow formation body 3G. 52; and two linear fluid passages 53 for discharging the fluid flowing into the outlet port 51 from the discharge port 52. The two outflow ports 51 are formed at positions farther from the object to be attracted than the discharge port 35. The two discharge ports 52 are formed at a position farther from the object to be attracted than the supply port 36. The two fluid passages 53 are formed to extend in the radial direction of the inner circumference of the main body 31. And formed in a straight line. And formed substantially perpendicularly to the central axis of the main body 31. In the swirling flow forming body 3G, the inner peripheral surface 311 of the main body 31 guides the fluid discharged from the discharge port 35 to the outflow port 51. [0038] It is also possible to mount a member for adjusting the amount of the fluid discharged from the discharge port 52 in the swirling flow forming body 3G. Fig. 15 is a perspective view showing an example of the upper surface of the swirling flow forming body 3H on which the discharge flow rate adjusting cover 54 is attached to the discharge port 52. The discharge flow rate adjustment cover 54 is a rectangular plate body, and is attached to the peripheral edge portion of the cover 38A by the switch discharge port 52. The discharge flow rate adjustment cover 54 is slid in the lateral direction, and the discharge flow rate adjustment cover 54 adjusts the area of the discharge discharge port 52 to adjust the amount of fluid discharged from the discharge port 52. [0039] FIG. 16 is a longitudinal cross-sectional view showing an example of the swirling flow forming body 3I in which the discharge flow rate adjusting valve 55 is attached to the fluid passage 53. The discharge flow rate adjustment valve 55 is a rectangular plate body to which the switchable fluid passage 53 is attached. The opening of the discharge flow rate adjusting valve 55 is adjusted to adjust the amount of fluid discharged from the discharge port 52. Further, the shape of the outflow port 51 and the discharge port 52 is not limited to a rectangular shape, and may be circular or elliptical. The number of the outflow port 51 and the discharge port 52 is not limited to two. It can also be one or three or more. The cross-sectional shape of the fluid passage 53 is not limited to a rectangular shape, and may be circular or elliptical. The number of fluid passages 53 is not limited to two. It can also be one or three or more. The fluid passage 53 can also be curved. The fluid passage 53 may be formed to be inclined with respect to a direction substantially perpendicular to the central axis of the main body 31. Specifically, it is formed by obliquely extending from the discharge port 52 to the outflow port 51 toward the second end surface 34 side. Further, in the case where the spacer 39 is omitted as in the present modification, the main body 31 and the cover 38 may be integrally formed. At this time, the two outflow ports 51 are formed on the inner peripheral surface of the main body 31A integrally formed with the lid 38, and the two discharge ports 52 are formed on the outer peripheral surface of the main body 31A. At this time, the outflow port 51 and the discharge port 52 may be formed in the vicinity of the center of the main body 31 in the central axis direction, respectively. One end of the through hole 32 is a recess formed to be closed by the cover 38. Even if it is not integrally formed, the main body 31 and the cover 38 can be combined as one main body. That is, the "body" related to the present invention also includes the combined body 31 and the cover 38. 2-4. Modification 4 The four spacers 39 may also hold the cover 38 unfixedly but are swingably held. Fig. 17 is a perspective view showing an example of the upper surface of the swirling flow forming body 3J having the four guide shafts 9 of the holding member that swingably holds the cover 38. The swirling flow forming body 3J has four guide shafts 9 having a head portion having a larger diameter than the hole formed in the cover 38, and a crotch portion having a diameter smaller than the above-mentioned hole to allow the cover 38 to swing. The four guide shafts 9 are held such that the cover 38 can swing in the through direction of the through hole 32. The lid 38 is swingable to prevent the member sucked into the through hole 32 from being clogged between the lid 38 and the second end surface 34. 2-5. Modification 5 It is also possible to use the two swirling flow forming bodies 3 in combination. FIG. 18 is a longitudinal cross-sectional view showing an example of the swirling flow forming body 3K in which the other swirling flow forming body 3 is formed so that the second end faces 34 of the other swirling flow forming body 3 are superposed on each other on one of the swirling flow forming bodies 3. The cover 38 in this swirling flow forming body 3K is shared by the two swirling flow forming bodies 3. The central axes of the main bodies 31 of the other two swirling flow forming bodies 3 are substantially identical. According to this swirling flow forming body 3K, it is possible to simultaneously attract the two plate-like members. 19 is a perspective view showing an example of a suction device 1A in which a plurality of swirling flow forming bodies 3 are integrally formed. In the suction device 1A, the main body 31 of the five swirling flow forming bodies 3 is integrally formed into a rectangular parallelepiped base body 6, and the lids 38 of the five swirling flow forming bodies 3 are integrally formed into a rectangular plate cover. 7. The through holes 32 in the base 6 are arranged on a straight line and at equal intervals. When the object to be attracted is a rod, each of the through holes 32 is disposed along the longitudinal direction of the object to be attracted. Each of the fluid passages 37 is disposed to extend substantially perpendicularly to the longitudinal direction of the base body 6. According to the suction device 1A, the one bar member can be held by the negative pressure generated in the plurality of through holes 32. For example, it can attract a refill or an injection needle that holds a mechanical pencil. Further, in Fig. 19, the illustration of the spacer 39 connecting the base body 6 and the cover 7 is omitted. The shape of the base body 6 and the cover 7 and the number and arrangement of the through holes 32 are not limited to the examples shown in Fig. 19. 20 is a perspective view showing an example of a suction device 1B in which a plurality of swirling flow forming bodies 3 are integrally formed. Fig. 21 is a plan view showing the suction device 1B. Fig. 22 is a sectional view taken along line IV-IV of Fig. 21. In the suction device 1B, the main body 31 of the three swirling flow forming bodies 3 is integrally formed into a thick and substantially hemispherical shell-shaped base body 6A, and the lids 38 of the three swirling flow forming bodies 3 are integrally formed into a thin body. A substantially hemispherical shell-like cover 7A of the wall. The base body 6A has a substantially hemispherical inner peripheral surface 61 and a peripheral surface 62 and an annular edge end surface 63. The inner peripheral surface 61 is formed along a curved surface of the object to be attracted. Each of the through holes 32 is open to the inner peripheral surface 61 and open to the outer peripheral surface 62. Each of the through holes 32 is disposed at equal intervals along the circumference of the inner peripheral surface 61. Each of the through holes 32 is formed to extend linearly in the radial direction of the base 6A. Each of the supply ports 36 is open at the edge end face 63. The cover 7A is attached to the base 6A so as to cover the peripheral surface 62. Further, in Figs. 20 to 22, the illustration of the spacer 39 connecting the cover 7A and the base 6A is omitted. According to this suction device 1B, the member that holds one sphere can be attracted by the negative pressure generated in the plurality of through holes 32. Further, the shape of the base body 6A and the cover 7A and the number and arrangement of the through holes 32 are not limited to the examples shown in FIGS. 20 to 22. 2-6. Modification 6 A through hole may be formed in the substrate 2 of the suction device 1. Fig. 23 is a perspective view showing an example of the upper surface of the suction device 1C having the substrate 2A in which the plurality of through holes 21 are formed. The substrate 2A of the suction device 1C has six through holes 21 formed at equal intervals on the same circumference as the swirling flow forming body 3. The six through holes 21 are arranged differently from the swirling flow forming body 3 . Further, the substrate 2A has a diameter smaller than the circumference on which the swirling flow forming body 3 is disposed and is formed on the concentric circumference, and six through holes 21 are formed at equal intervals. Further, the shape, number, and arrangement of the through holes 21 are not limited to the examples shown in FIG. [0047] 2-7. Modification 7 The lid 38 of the swirling flow forming body 3 may be integrated with the substrate 2. Fig. 24 is a vertical cross-sectional view showing an example of a suction device 1D for replacing the cover 38 of the swirling flow forming body 3 with the substrate 2. The four spacers 39 of the swirling flow forming body 3 in the suction device 1D extend substantially perpendicularly from the second end surface 34 toward the substrate 2, and connect the main body 31 and the substrate 2. The four spacers 39 are a flow path for flowing a fluid flowing out from the through hole 32 between the second end surface 34 and the substrate 2 . Further, in the substrate 2 of the suction device 1D, a plurality of through holes 21 may be formed in the same manner as the above-described substrate 2A. [0048] 2-8. Modification 8 The first end face 33 and the second end face 34 of the swirling flow forming body 3 may be integrated with the substrate 2, respectively. Fig. 25 is a perspective view showing an example of the upper surface of the suction device 1E in which the first end surface 33 of each of the swirling flow forming bodies 3 is replaced by the substrate 2B and the second end surface 34 is replaced by the substrate 2C. Fig. 26 is a perspective view showing an example of the lower surface of the suction device 1E. The substrates 2B and 2C of the suction device 1E are overlapped so that the central axes thereof substantially coincide with each other. Twenty through holes 32 are formed in the substrate 2B at equal intervals along the periphery thereof. Further, six through holes 32 are formed at equal intervals on a circumference having a diameter smaller than the circumference on which the through holes 32 are formed and concentric. A cover 38 is attached to the substrate 2C through the spacer 39 to cover the respective through holes 32. Further, the peripheral portion of the suction device 1E may be closed. Further, the shapes of the substrates 2B and 2C and the number and arrangement of the through holes 32 are not limited to the examples shown in FIGS. 25 and 26. 2-9. Modification 9 The first end face 33 and the cover 38 of the swirling flow forming body 3 may be integrated with the substrate 2, respectively. Fig. 27 is a perspective view showing an example of a lower surface of the suction device 1F in which the first end surface 33 of each of the swirling flow forming bodies 3 is replaced by the substrate 2B and the lid 38 is replaced by the substrate 2D. An example of the upper surface of the suction device 1F is shown in Fig. 25 as described above. The substrates 2B and 2D of the suction device 1F are overlapped so that the central axes thereof substantially coincide with each other. Twenty through holes 32 are formed in the substrate 2B at equal intervals along the periphery thereof. Further, six through holes 32 are formed at equal intervals on a circumference having a diameter smaller than the circumference on which the through holes 32 are formed and concentric. In order to discharge the fluid to the suction device 1F, the substrate 2D has a circular through hole 22 formed at the center, six circular through holes 23 formed at equal intervals so as to surround the through hole 22, and a surrounding six Four circular through holes 24 are formed at equal intervals in the manner of the through holes 23. Further, the peripheral portion of the suction device 1F may be closed. Further, the shapes of the substrates 2B and 2D and the number and arrangement of the through holes 22 to the through holes 24 are not limited to the examples shown in FIGS. 25 and 27. [0050] FIG. 28 is a perspective view showing an example of the upper surface of the suction device 1G in which the first end surface 33 of each of the swirling flow forming bodies 3 is replaced by the substrate 2E and the lid 38 is replaced by the substrate 2F. Fig. 29 is a perspective view showing an example of the lower surface of the suction device 1G. The substrates 2E and 2F of the suction device 1G are overlapped so that the central axes thereof substantially coincide with each other. The peripheral portion of the suction device 1G is closed. Twenty through holes 32 are formed in the substrate 2E at equal intervals along the periphery thereof. Further, 18 through holes 25 are formed in order to discharge the fluid to the suction device 1G on a circumference having a smaller diameter than the circumference on which the through holes 32 are formed. Further, six through holes 32 are formed at equal intervals on a circumference which is smaller in diameter than the circumference on which the through holes 25 are formed and which are concentric. Further, 18 through holes 25 are formed in order to discharge the fluid to the suction device 1G on a circumference having a smaller diameter than the circumference on which the through holes 32 are formed. A through hole 26 is formed in the center of the substrate 2F for mounting a component for fluid supply (not shown). The through hole 26 is closed when the component is attached to the suction device 1G. After the suction device 1G closes the peripheral portion and closes the through hole 26, the fluid flowing out from the through hole 32 is discharged from the through hole 25 formed in the substrate 2E. Further, the number and arrangement of the through holes 32 are not limited to the examples shown in FIG. Further, the shapes of the substrates 2E and 2F and the shapes, the number, and the arrangement of the through holes 25 and 26 are not limited to the examples shown in Figs. 28 and 29. 2-10. Modification 10 The shape of the substrate 2 is not limited to a circular shape. It may also be an elliptical or rectangular or double-stranded fork shape (refer to Japanese Laid-Open Patent Publication No. 2005-51260). Fig. 30 is a perspective view showing an example of the suction device 1H having the rectangular substrate 2G. The suction device 1H has a rectangular substrate 2G and three swirling flow forming bodies 3 fixed to the upper surface of the substrate 2G. Each of the swirling flow forming bodies 3 has its upper surface of the lid 38 fixed to the upper surface of the substrate 2G by, for example, a screw. Further, each of the swirling flow forming bodies 3 is arranged on the substrate 2G in a straight line and at equal intervals. When the object to be attracted is a rod, each of the swirling flow forming bodies 3 is disposed along the longitudinal direction of the object to be attracted. Each of the fluid passages 37 is disposed to extend substantially perpendicularly with respect to the longitudinal direction of the substrate 2G. According to this suction device 1H, a rod-shaped member can be held by the negative pressure generated in the plurality of through holes 32. For example, a refill or an injection needle that attracts a mechanical pencil. Further, in Fig. 30, the illustration of the spacer 39 that connects the main body 31 of the swirling flow forming body 3 and the cover 38 is omitted. The shape of the substrate 2G and the swirling flow forming body 3 and the arrangement are not limited to the examples shown in FIG. 31 is a perspective view showing an example of a suction device 1I having a truncated hexagonal tapered substrate 2H having a concave portion having a cross-sectional hexagonal shape on the bottom surface. The suction device 1I has a truncated hexagonal tapered substrate 2H having a concave portion having a hexagonal cross section on the bottom surface, and three swirling flow forming bodies 3 fixed to the inner side surface 27 of the substrate 2H. Each of the swirling flow forming bodies 3 has its upper surface of the lid 38 fixed to the inner side surface 27 of the substrate 2H by, for example, a screw. Further, each of the swirling flow forming bodies 3 fixes the opening of the first end surface 33 along the curved surface of the object to be attracted on the inner side surface 27. Further, each of the swirling flow forming bodies 3 is disposed at equal intervals on the inner side surface 27. According to this suction device 1I, the member that holds one sphere can be attracted by the negative pressure generated in the plurality of through holes 32. Further, in Fig. 31, the illustration of the spacer 39 that connects the main body 31 of the swirling flow forming body 3 and the cover 38 is omitted. The shape of the substrate 2H and the swirling flow forming body 3 and the arrangement are not limited to the examples shown in FIG. In the above embodiment, the number of the swirling flow forming bodies 3 provided on the substrate 2 is not limited to six. It can also be less than six or more than seven. The method of arranging the swirling flow forming body 3 of the substrate 2 is not limited to the examples shown in FIGS. 1 to 3 . For example, it is not necessary for each of the swirling flow forming bodies 3 in the substrate 2 to arrange the formed swirling flow so that the clockwise direction and the counterclockwise direction are different from each other. 2-11. Modification 11 The object to be attracted by the suction device 1 is not limited to the foodstuff. The attraction object can also be, for example, a food. Alternatively, it may be a member such as a semiconductor wafer or a glass substrate. The shape of the attraction object is not limited to a plate shape. The shape may be a shape that can maintain the negative pressure generated in the through hole 32, and may be, for example, a spherical shape. Even in the case of a shape other than a plate shape, vibration and rotation of the object to be attracted can be suppressed. The raw material to be attracted may be a permeable raw material as long as the negative pressure generated in the through hole 32 can be maintained. 2-12. Modification 12 The peripheral shape of the main body 31 of the swirling flow forming body 3 is not limited to a circular shape. It can also be oval or rectangular. The tapered cone that is filled into the inner peripheral surface 311 is not limited to the linear cone. It can also be a parabolic cone or an exponential function cone. As another example, the inner peripheral surface 311 may have a stepped shape in which the cross-sectional area thereof increases in diameter as it goes away from the object to be attracted. As another example, a spiral groove that guides the fluid discharged from the discharge port to the opening of the second end surface 34 may be formed in the inner peripheral surface 311. [0056] The cross-sectional shape of the through hole 32 is not limited to a circular shape. It can also be oval or rectangular. [0057] The first end surface 33 and the second end surface 34 may not be flat. It can also be bumps. [0058] The number of the discharge ports 35 is not limited to two. It can also be one or three or more. The position of the inner peripheral surface 311 in the discharge port 35 is not limited to the center of the main body 31 in the central axis direction. It may be a near first end face 33 or a near second end face 34. [0059] The number of fluid passages 37 is not limited to two. It can also be one or three. The fluid passage 37 can also be curved. The fluid passage 37 can also have a constant diameter. [0060] The shape of the cover 38 is not limited to a circular shape. It can also be oval or rectangular. The size of the cover 38 may also be such as to cover the through hole 32. [0061] The shape of the spacer 39 is not limited to a cylinder. It can also be an elliptical or corner column. The number of the spacers 39 is not limited to four. It can also be less than four or more than five. The method of arranging the spacers 39 is not limited to the examples shown in FIGS. 5 and 6. For example, it is also possible to extend from the peripheral surface 312 of the body 31. The spacer 39 may be attached to the second end portion 34 at a position that blocks the flow path of the fluid flowing out from the through hole 32. 2-13. Modification 13 A baffle that blocks entry of the attracting object into the through hole 32 may be attached to the first end surface 33 of the swirling flow forming body 3 (see, for example, Japanese Patent No. 5908136). Fig. 32 is a perspective view showing an example of the swirling flow forming body 3G in which the baffle plate 8 having the slit 81 in the center is attached to the first end surface 33. The shutter 8 has the same shape as the above-described cover 38A. The slit 81 is formed to extend substantially orthogonally to the groove 381 (not shown) formed in the lid 38A. When the length of the slit 81 in the longitudinal direction is a member having a rod shape, the length of the slit 81 is set to be shorter than the length of the object to be attracted in the longitudinal direction. Alternatively, when the width of the slit 81 is a member having a rod shape, the width of the slit 81 is set to be narrower than the width of the object to be attracted. This baffle 8 is attached to the swirling flow forming body 3G, and the member holding the elongated rod shape can be sucked by one by one. For example, it can attract a refill or an injection needle that holds a mechanical pencil. Further, the shape of the slit 81 is not limited to the example shown in Fig. 32, and can be determined in accordance with the shape of the object to be attracted. 2-14. Modification 14 When the baffle plate is attached to the first end surface 33 of the swirling flow forming body 3, it can be attached through a spacer (for example, see Japanese Patent No. 5908136). 2-15. Modification 15 A friction member that is in contact with the object to be attracted and suppresses vibration and rotation of the object to be attracted by frictional force may be attached to the first end surface 33 of the swirling flow forming body 3 (for example, see Japanese Special Opening) Bulletin 2005-142462). 2-16. Modification 16 An electric fan (see, for example, Japanese Laid-Open Patent Publication No. 2011-138948) can be used as the swirling flow forming means instead of the two fluid passages 37 of the swirling flow forming body 3. 2-17. Modification 17 The outflow direction of the fluid flowing out from the through hole 32 along the second end surface 34 is not limited to a direction substantially perpendicular to the central axis of the main body 31. For example, the second end face 34 and the cover 38 may also discharge the fluid flowing out of the through hole 32 in a direction parallel to the central axis of the main body 31 (more specifically, above the main body 31).

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I: suction devices 2, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H: substrates 3, 3A, 3B, 3C, 3D, 3E, 3F, 3G, 3H, 3I, 3J, 3K: swirling flow forming body 4: fluid joint 6, 6A: base body 7, 7A: cover 8: baffle 9: guide shaft 21: through hole 22: Through hole 23: through hole 24: through hole 25: through hole 26: through hole 31: main body 32: through hole 33: first end face 34: second end face 35: discharge port 36: supply port 37, 37A: fluid passage 38 38A: cover 39, 39A: spacer 51: outflow port 52: discharge port 53: fluid passage 54: discharge flow rate adjustment cover 55: discharge flow rate adjustment valve 61: inner peripheral surface 62: peripheral surface 63: edge end surface 81: open Seam 311: inner peripheral surface 312: peripheral surface 313: inclined surface 314: curved surface 315: inner peripheral surface 316: inner peripheral surface 381: groove

[0017] FIG. 1 is a perspective view showing an example of the upper surface of the suction device 1. Fig. 2 is a perspective view showing an example of the lower surface of the suction device 1. Fig. 3 is a cross-sectional view taken along line I-I of Fig. 1. Fig. 4 is a perspective view showing an example of the lower surface of the swirling flow forming body 3. Fig. 5 is a perspective view showing an example of the upper surface of the swirling flow forming body 3. Fig. 6 is a sectional view taken along line II-II of Fig. 5. Fig. 7 is a longitudinal sectional view showing an example of the swirling flow forming body 3A. Fig. 8 is a longitudinal sectional view showing an example of the swirling flow forming body 3B. Fig. 9 is a longitudinal sectional view showing an example of the swirling flow forming body 3C. Fig. 10 is a longitudinal sectional view showing an example of the swirling flow forming body 3D. Fig. 11 is a longitudinal sectional view showing an example of the swirling flow forming body 3E. Fig. 12 is a longitudinal sectional view showing an example of the swirling flow forming body 3F. Fig. 13 is a perspective view showing an example of the upper surface of the swirling flow forming body 3G. Fig. 14 is a sectional view taken along line III-III of Fig. 13. Fig. 15 is a perspective view showing an example of the upper surface of the swirling flow forming body 3H. Fig. 16 is a longitudinal sectional view showing an example of the swirling flow forming body 3I. Fig. 17 is a perspective view showing an example of the upper surface of the swirling flow forming body 3J. Fig. 18 is a longitudinal sectional view showing an example of the swirling flow forming body 3K. Fig. 19 is a perspective view showing an example of the suction device 1A. Fig. 20 is a perspective view showing an example of the suction device 1B. Fig. 21 is a plan view showing an example of the suction device 1B. Fig. 22 is a sectional view taken along line IV-IV of Fig. 21. Fig. 23 is a perspective view showing an example of the upper surface of the suction device 1C. Fig. 24 is a longitudinal sectional view showing an example of the suction device 1D. Fig. 25 is a perspective view showing an example of the upper surface of the suction device 1E. Fig. 26 is a perspective view showing an example of the lower surface of the suction device 1E. Fig. 27 is a perspective view showing an example of the lower surface of the suction device 1F. Fig. 28 is a perspective view showing an example of the upper surface of the suction device 1G. Fig. 29 is a perspective view showing an example of the lower surface of the suction device 1G. Fig. 30 is a perspective view showing an example of the suction device 1H. Fig. 31 is a perspective view showing an example of the suction device 1I. Fig. 32 is a perspective view showing an example of the swirling flow forming body 3G of the mounting baffle 8.

Claims (13)

A swirling flow forming body comprising: a main body; a first end surface formed on the main body and facing the object to be attracted; a hole opening in the first end surface; and a discharge port formed in the surface facing the hole The inner peripheral surface of the main body; and the first fluid passage, the fluid is ejected from the discharge port toward the hole to form a swirling flow, and a negative pressure is generated to attract the sucked object, and the inner peripheral surface forms a fluid discharged from the discharge port toward The direction in which the object to be attracted is directed away is discharged from the hole. The swirling flow forming body according to claim 1, wherein at least a portion of the inner peripheral surface is formed such that a cross-sectional area of the hole expands away from the object to be attracted. The swirling flow forming body according to the first aspect of the invention, wherein the hole is a through hole that is open at the first end surface and that is open at a second end surface opposite to the first end surface, wherein the inner peripheral surface is formed The fluid discharged from the discharge port is guided toward the opening of the second end surface. The swirling flow forming body described in claim 2, wherein The hole is a through hole that is opened at the first end surface and that is open to the second end surface on the opposite side of the first end surface, and the inner peripheral surface is formed to guide the fluid discharged from the discharge port toward the opening of the second end surface . The swirling flow forming body according to the third aspect of the invention, wherein the inner peripheral surface is an opening that extends from the opening of the first end surface across the second end surface, and the cross-sectional area of the hole is formed along with the object to be attracted Stay away and gradually expand. The swirling flow forming body according to the fourth aspect of the invention, wherein the inner peripheral surface is an opening that extends from the opening of the first end surface across the second end surface, and the cross-sectional area of the hole is formed along the object to be attracted Stay away and gradually expand. The swirling flow forming body according to any one of the third to sixth aspect, wherein the edge of the opening of the second end surface is chamfered. The swirling flow forming body according to any one of the third to sixth aspect, further comprising: a plate body; and holding the plate body facing the second end surface, and the second end surface and the second end surface A holding member for forming a flow path for fluid flow from the hole is formed between the plate bodies. The vortex flow forming body according to Item 8 of the patent application, wherein The holding member holds the plate body so as to be swingable in a through direction of the through hole. The swirling flow forming body according to the first or second aspect of the invention, further comprising: an outflow port formed at a position of the inner peripheral surface that is away from the object to be attracted by the discharge port; and a discharge port; The outer surface of the main body is formed; and the second fluid passage discharges the fluid flowing into the outlet from the outlet, and the inner peripheral surface guides the fluid discharged from the discharge port toward the outlet. The swirling flow forming body according to any one of the first to sixth aspect, wherein the first fluid passage is formed such that a fluid discharged from the discharge port flows in a direction away from the object to be attracted. . A swirling flow forming body comprising: a main body; a first end surface formed on the main body and facing the object to be attracted; a hole opening in the first end surface; and a discharge port formed in the surface facing the hole An inner peripheral surface of the main body; and a first fluid passage through which the fluid is sprayed from the discharge port toward the hole The formation of the swirling flow generates a negative pressure to suck the attracted object, and the first fluid passage forms a fluid that is discharged from the discharge port and flows out of the hole in a direction away from the object to be attracted. A suction device comprising: a base body; and one or more swirling flow formation bodies according to any one of the first to twelfth aspects of the invention.