WO2023135909A1 - 電子部品収納容器 - Google Patents
電子部品収納容器 Download PDFInfo
- Publication number
- WO2023135909A1 WO2023135909A1 PCT/JP2022/041338 JP2022041338W WO2023135909A1 WO 2023135909 A1 WO2023135909 A1 WO 2023135909A1 JP 2022041338 W JP2022041338 W JP 2022041338W WO 2023135909 A1 WO2023135909 A1 WO 2023135909A1
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- WIPO (PCT)
- Prior art keywords
- electronic component
- wall portion
- wall
- electronic
- container
- Prior art date
Links
- 230000004308 accommodation Effects 0.000 title abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000003860 storage Methods 0.000 claims description 45
- 230000003746 surface roughness Effects 0.000 abstract description 30
- 235000019592 roughness Nutrition 0.000 description 26
- 210000000078 claw Anatomy 0.000 description 10
- 238000005422 blasting Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/0084—Containers and magazines for components, e.g. tube-like magazines
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/04—Mounting of components, e.g. of leadless components
- H05K13/043—Feeding one by one by other means than belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/38—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for delicate optical, measuring, calculating or control apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/28—Handles
- B65D25/30—Hand holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/38—Devices for discharging contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/38—Devices for discharging contents
- B65D25/52—Devices for discharging successive articles or portions of contents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/02—Feeding of components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/02—Feeding of components
- H05K13/028—Simultaneously loading a plurality of loose objects, e.g. by means of vibrations, pressure differences, magnetic fields
Definitions
- the present invention relates to an electronic component storage container for storing electronic components such as chip components.
- Patent Literature 1 discloses an electronic component storage container in which electronic components in a loose state are collectively stored in the electronic component storage container, and the stored electronic components are dropped from a discharge port at the bottom to a feeder.
- An object of the present invention is to provide an electronic component storage container capable of reducing the amount of electronic components adhering to the inner wall portion by adjusting the surface roughness of the inner wall portion of the electronic component storage container.
- the present invention provides an electronic component storage container comprising a component storage space for storing a plurality of electronic components and an outlet for discharging the electronic components stored in the component storage space to the outside. and wherein the skewness Rsk of the inner wall surrounding the component housing space is -0.8 or more and -0.3 or less.
- the present invention by adjusting the surface roughness of the inner wall portion of the electronic component storage container, it is possible to provide an electronic component storage container capable of reducing the amount of electronic components adhering to the inner wall portion.
- FIG 2 is a front view of the electronic component container 1 viewed from the front; FIG. It is the bottom view which looked at the electronic component container 1 from the downward direction. It is the figure which looked at the inside of the electronic component container 1 from one side.
- 4 is a graph showing the relationship between the skewness Rsk of the electronic component housing container 1 and the number of electronic components M remaining in the component housing space 11 adhering to the inner wall. 4 is a graph showing the relationship between the arithmetic average roughness Ra of the electronic component housing container 1 and the number of electronic components M remaining in the component housing space 11 adhering to the inner wall portion. 4 is a graph showing the relationship between the root-mean-square roughness Rq of the electronic component housing container 1 and the number of electronic components M remaining in the component housing space 11 adhering to the inner wall portion.
- FIG. 1 is a front view of the electronic component container 1 as seen from the front.
- FIG. 2 is a bottom view of the electronic component container 1 as seen from below.
- FIG. 3 is a view of the inside of the electronic component container 1 viewed from one side.
- the electronic component container 1 accommodates therein a plurality of electronic components M as components in a loose state.
- An electronic component container 1 containing a plurality of electronic components M is set in a feeder (not shown), and the electronic components M are ejected from the electronic component container 1 and supplied to a mounting device or the like by vibrating the feeder.
- the electronic component M of the present embodiment is, for example, a minute rectangular parallelepiped electronic component M with a longitudinal length of 1.2 mm or less. Examples of such electronic components M include capacitors, inductors, and the like, but the present embodiment is not limited to these.
- the arrows W, L, and H shown in the reference drawings respectively indicate the left-right direction W, front-back direction L, and up-down direction H of the electronic component container 1 set in the feeder and in use.
- the electronic component container 1 has a first member 2 and a second member 3 that are divided into left and right.
- the first member 2 and the second member 3 are molded bodies made of resin such as ABS resin.
- the first member 2 and the second member 3 are united and joined to form the electronic component container 1 .
- the bonding between the first member 2 and the second member 3 is performed by means such as ultrasonic bonding or bonding with an adhesive, but is not limited to these means.
- FIG. 3 shows the inside of the second member 3 on the right without the first member 2 on the left.
- the electronic component storage container 1 has a flat box shape that is long in the front-rear direction L and thin in the left-right direction W. As shown in FIG. In the following description, unless necessary, the first member 2 and the second member 3 will not be described individually, and the structure in which the first member 2 and the second member 3 are joined together will be described.
- the electronic component container 1 includes a container body 10 for containing a plurality of electronic components M, a discharge port 19 as an opening for containing the electronic components M in the electronic component container 1 and for discharging the electronic components M, A shutter member 30 for opening and closing the outlet 19 and a slide operation member 35 for performing a slide operation of the shutter member 30 are provided.
- the container body 10 includes a top plate portion 12 and a bottom plate portion 13 extending in the front-rear direction L, a front wall portion 14 and a rear wall portion 15 extending in the vertical direction H, a pair of left and right side wall portions 16, and a container body. and an inclined plate portion 17 that vertically partitions the interior of the device 10 .
- the rear wall portion 15 includes an outer rear wall portion 15a forming the outer surface and an inner rear wall portion 15b in front of the outer rear wall portion.
- a component accommodation space 11 is formed to accommodate a plurality of electronic components M in a loose state.
- the discharge port 19 is provided at the lower portion of the front wall portion 14 .
- the discharge port 19 is a rectangular opening. Note that the outlet 19 is not limited to a rectangular shape, and may be circular, elliptical, or the like.
- the outlet 19 is opened and closed by a shutter member 30 .
- the inclined plate portion 17 is a plate member that extends between the left and right side wall portions 16 and extends from the inner rear wall portion 15 b to the lower portion of the discharge port 19 .
- the inclined plate portion 17 is arranged below the center in the vertical direction H inside the container body 10 .
- the upper side of the inclined plate portion 17 is the component housing space 11
- the lower side is the lower space 18 .
- the inclined plate portion 17 is inclined downward toward the discharge port 19 , and its upper surface is an inclined surface 17 i that is inclined downward toward the discharge port 19 .
- the inclination angle ⁇ 1 of the inclined surface 17i is about 5° with respect to the horizontal direction when the electronic component container 1 is set on the feeder.
- the inclination angle ⁇ 1 of the inclined surface 17i is preferably 3° or more and 10° or less.
- the inclination angle ⁇ 1 of the inclined surface 17i is appropriately adjusted according to the vibration conditions of the feeder.
- a hole 16a extending in the front-rear direction is formed in the lower and rear part of the lower space 18, and a strip-shaped RFID tag 27 long in the front-rear direction L is arranged on the upper surface of the hole 16a.
- the RFID tag 27 has a known configuration including a transmitter/receiver, memory, antenna, and the like.
- a reader/writer for reading/writing information from/to the RFID tag 27 is arranged in the feeder in which the electronic component container 1 is set.
- the container body 10 has an upper gripping portion 28A and a rear gripping portion 28B.
- the upper gripping portions 28A are a pair of front and rear depressions provided at both front and rear ends of the upper side of the container body 10 .
- the rear gripping portion 28B is a pair of upper and lower recesses provided at both upper and lower ends of the rear side of the container body 10 .
- Each of the upper gripping portion 28A and the rear gripping portion 28B is gripped by the robot hand, for example, when the electronic component container 1 is transported by the robot hand.
- the container body 10 has a plurality of claws on the bottom surface for detachably setting the container body 10 on the feeder.
- the first claw portion 61, the second claw portion 62, and the third claw portion 63 are provided on the bottom surface at intervals in the front-rear direction L.
- Each of the first claw portion 61 , the second claw portion 62 and the third claw portion 63 is formed integrally with the container body 10 .
- Each of the first claw portion 61 and the second claw portion 62 is configured as a T-shaped slot having an inverted T-shaped cross section in a plane along the vertical and horizontal directions.
- the third claw portion 63 is a plate piece portion that extends rearward and is L-shaped when viewed from the side.
- the shutter member 30 opens and closes the discharge port 19 by sliding.
- the shutter member 30 extends continuously from the bottom plate portion 13 to the front wall portion 14 and is slidable along the extending direction.
- the shutter member 30 is an elongate strip-shaped film member.
- the shutter member 30 is made of a flexible material that has some rigidity and can be bent, such as PET (polyethylene terephthalate).
- PET polyethylene terephthalate
- the thickness of the shutter member 30 made of such a film-like member is not limited, it preferably has a thickness of, for example, 0.1 mm or more and 0.5 mm or less.
- the width of the shutter member 30 is slightly larger than the width of the discharge port 19 and has a width that can cover the discharge port 19 without any gap.
- An opening 31 having substantially the same shape as the outlet 19 is provided at the front end of the shutter member 30 .
- the shutter member 30 is slidable along the lower guide portion 5 and the upper guide portion 4 of the container body 10 .
- the lower guide portion 5 is arranged above the bottom plate portion 13
- the upper guide portion 4 is arranged above the discharge port 19 .
- the rear side of the shutter member 30 slides along the lower guide portion 5 in the generally horizontal front-rear direction L
- the front side of the shutter member 30 slides in the vertical direction H along the upper guide portion 4 .
- Each of the lower guide portion 5 and the upper guide portion 4 forms a passage that holds the shutter member 30 slidably while keeping the plane direction of the shutter member 30 along the horizontal direction W. As shown in FIG.
- the lower guide part 5 includes a first lower guide part 51 arranged below the discharge port 19 and a second lower guide part 52 arranged behind the first lower guide part 51 .
- the second lower guide portion 52 is composed of a gap formed between the bottom plate portion 13 and the convex portion 17 c projecting downward from the front end portion of the inclined plate portion 17 .
- the first lower guide portion 51 is configured by the front end surface 17 b of the inclined plate portion 17 and the front end portion 29 of the bottom plate portion 13 .
- the rear portion of the shutter member 30 passes through the gap between the convex portion 17 c and the bottom plate portion 13 in the second lower guide portion 52 .
- the rear portion of the shutter member 30 slides in the front-rear direction L directly above the bottom plate portion 13 .
- the shutter member 30 slides along the front end portion 29 of the bottom plate portion 13 curved concavely in the front-rear direction L, and further slides along the front end surface 17 b of the inclined plate portion 17 .
- it bends upward at an angle of approximately 90° from the horizontal direction, and changes to a posture that extends in the vertical direction H.
- the upper guide portion 4 includes a guide slit 41 formed in the front wall portion 14 and extending in the vertical direction H.
- the front end portion of the shutter member 30 is inserted into the guide slit 41 from the lower end of the front wall portion 14 and slides along the vertical direction H within the guide slit 41 .
- the slide operation member 35 is a member for opening and closing the discharge port 19 by sliding the shutter member 30 .
- a slide operation member 35 is arranged at the rear end portion of the shutter member 30 .
- the bottom plate portion 13 of the container body 10 has a projecting plate portion 21 on its front side.
- the protruding plate portion 21 protrudes downward and extends in the front-rear direction L.
- a long hole 21 a extending in the front-rear direction L is provided in the projecting plate portion 21 .
- a plate portion 26 is arranged above the projecting plate portion 21 with a predetermined space 22 therebetween.
- the plate portion 26 is substantially parallel to the projecting plate portion 21 and is formed integrally with the bottom plate portion 13 .
- the space 22 is surrounded by the projecting plate portion 21 , the plate portion 26 and the left and right side wall portions 16 .
- the slide operation member 35 is arranged inside the space 22 .
- the front end portion of the plate portion 26 is provided with a front convex portion 26a that protrudes downward.
- the rear end portion of the plate portion 26 is provided with a rear convex portion 26b that protrudes downward.
- the slide operation member 35 is a rectangular plate piece elongated in the front-rear direction L.
- a circular operation hole 36 penetrating in the vertical direction H is formed in the slide operation member 35 .
- the operation hole 36 communicates with the long hole 21a of the container body 10 and is exposed to the outside through the long hole 21a.
- a slit 37 extending along the front-rear direction L and opening forward is formed in the middle of the slide operation member 35 in the vertical direction H.
- the rear end portion of the shutter member 30 is inserted into the slit 37 through the opening on the front side.
- the slit 37 opens on the front side of the slide operation member 35 and does not open on the rear side.
- the slits 37 may open on the left and right sides of the slide operation member 35 .
- a rear end portion of the shutter member 30 is inserted into the slit 37 through a front end opening of the slit 37 .
- the shutter member 30 is fixed to the slide operation member 35 by means of adhesion or the like. Thereby, the shutter member 30 can slide in the space 22 integrally with the slide operation member 35 . It slides in the front-rear direction L by being guided by sliding on the projecting plate portion 21 of the bottom plate portion 13 , the plate portion 26 and the left and right side wall portions 16 .
- a front concave portion 32a is provided at the front end portion, and a rear concave portion 32b is provided at the rear end portion.
- the front convex portion 26a of the plate portion 26 enters and engages with the front concave portion 32a, and further forward sliding is restricted.
- the opening 31 of the shutter member 30 is arranged above the discharge port 19 , and the discharge port 19 is closed by the portion of the shutter member 30 below the opening 31 .
- FIG. 3 shows the inside of the electronic component container 1 at the time of shipment.
- a user who has been supplied with the electronic component container 1 can open the outlet 19, for example, as follows.
- An operation pin (not shown) is inserted into the operation hole 36 of the slide operation member 35, and the operation pin is moved in the opening direction of the shutter member, that is, backward.
- the shutter member 30 is slid rearward in conjunction with the slide operation member 35, and the opening 31 of the shutter member 30 is aligned with the discharge port 19, thereby opening the discharge port 19.
- the mechanism for opening and closing the discharge port 19 by sliding the shutter member 30 is not limited to the configuration in which the slide operation member 35 is provided integrally with the shutter member 30 as described above, and other mechanisms may be employed. .
- the electronic component contact surface which is the surface in contact with the electronic component M in the electronic component container 1, has surface roughness within a predetermined range.
- Surface roughness is represented by skewness Rsk, arithmetic mean roughness Ra or root mean square roughness Rq.
- the electronic component contact surface includes the inner wall portion forming component accommodation space 11 and the inner surface of discharge port 19 , and may also include the outer wall surface of component accommodation space 11 .
- the inner walls are composed of side wall inner wall portions 16i of the pair of left and right side wall portions 16, an inclined surface 17i of the inclined plate portion 17, a rear wall inner wall portion 15i of the inner rear wall portion 15b, and a front wall inner wall portion 14i of the front wall portion 14. and a top plate inner wall portion 12 i of the top plate portion 12 .
- At least a portion of the electronic component contact surface that has surface roughness within a predetermined range includes a portion of the inner wall that has the largest contact area with the electronic component M.
- the inner wall portion having the largest contact area with the electronic component M is the side wall inner wall portion 16i. .
- At least a portion of the inner wall portion having surface roughness within a predetermined range preferably includes an inclined surface 17i in addition to the side wall inner wall portion 16i. More preferably, at least a portion of the inner wall portion having surface roughness within a predetermined range includes the rear inner wall portion 15i and the front inner wall portion 14i in addition to the side wall inner wall portion 16i and the inclined surface 17i. Furthermore, at least a portion of the inner wall portion having surface roughness within a predetermined range includes the top plate inner wall portion 12i in addition to the side wall inner wall portion 16i, the inclined surface 17i, the rear wall inner wall portion 15i and the front wall inner wall portion 14i. is more preferred.
- the portion having the predetermined range of surface roughness is preferably the entire surface of each surface. It preferably has a predetermined surface roughness. However, it is not limited to the entire surface, and may be part of the surface.
- the skewness Rsk which is one of the surface roughnesses in a predetermined range possessed by at least a portion of the inner wall portion forming the component housing space 11, is in the range of ⁇ 0.8 or more and ⁇ 0.3 or less. It is preferably -0.76 or more and -0.38 or less.
- the definition of Rsk is based on the standard described in JIS B 0601.
- Rsk is the height curve Z(x), which is the amplitude centered on the mean line at the reference length, dimensionless by the cube of the root-mean-square roughness Rq (described later) of the contour curve (height curve) represents the mean cube of Rsk indicates the degree of asymmetry for the probability density function of the height curve.
- l (El) in the formula shown in FIG. 4 is the length in the X-axis direction of the height curve used to obtain the characteristics of the height curve.
- Z(x) is the height at an arbitrary position x and is the ordinate value. When Rsk>0, it is biased downward with respect to the average line, and when Rsk ⁇ 0, it is biased upward with respect to the average line.
- the skewness Rsk is a parameter closely related to tribology (friction).
- the arithmetic mean roughness Ra which is one of the surface roughnesses within a predetermined range that at least a portion of the inner wall portion forming the component housing space 11 has, is 1.5 ⁇ m or more and 3.5 ⁇ m or less. is preferably in the range of
- the arithmetic average roughness Ra is the average value of the average height difference from the average plane. Only the reference length is extracted from the height curve in the direction of the average line, the X axis is taken in the direction of the average line of this extracted part, the Z axis is taken in the direction of the vertical magnification, and the height curve is expressed as Z (x) is obtained by the formula shown in FIG.
- the root-mean-square roughness Rq which is one of the surface roughnesses within a predetermined range that at least a portion of the inner wall portion forming the component housing space 11 has, is 1.8 ⁇ m or more and 4.5 ⁇ m or less in the embodiment. is preferably in the range of
- the root-mean-square roughness Rq corresponds to the standard deviation of the height distribution representing the root-mean-square of Z(x), which is the height at an arbitrary position x on the surface, and is obtained by the formula shown in FIG. Stable results can be obtained because it is easy to handle statistically and is less susceptible to disturbances such as dust, scratches, and noise.
- Rq is preferably larger than Ra. In this case, the surface roughness is rougher.
- a plurality of electronic component containers 1 (A, B, C, D, E, F) made of ABS resin and having different surface roughness were prepared.
- the surface roughness is adjusted by blasting the surface of the molding die, and adjusting the particle size and time during blasting.
- blasting is performed twice with different particle sizes to adjust the depth of the valleys.
- the skewness Rsk, the arithmetic mean roughness Ra and the root mean square roughness Rq were measured for each of the electronic component containers 1 (A, B, C, D, E, and F).
- the surface resistance value of the electronic component container 1 (A, B, C, D, E, F) is 10 8 ⁇ /cm 2 or more and 10 10 ⁇ /cm 2 or less, and is relatively difficult to be charged as a resin. .
- the surface roughness is defined by JIS B 0601-2001, which is defined by the Japanese Industrial Standards Committee.
- a shape measuring laser microscope VK-X100 manufactured by KEYENCE
- the observation magnification is 200x (objective 10x, 1350x1012 ⁇ m)
- the resolution is 1.36 ⁇ m/pixel measurement
- the mode is JIS B0601- 2001 (ISO4287:1997).
- the surface roughness of the inner wall portion forming the component housing space 11 was measured at the inner wall portion where the contact area with the electronic component M was the largest.
- the inner wall portion having the largest contact area with the electronic component M is the two side wall inner wall portions 16i, and one of them was used.
- all the inner wall portions forming the component housing space 11 are manufactured in the same manner, all the inner wall portions have substantially the same surface roughness.
- the average value of the surface roughness (skewness Rsk, arithmetic mean roughness Ra and root mean square roughness Rq) measured at arbitrary three points of the side wall inner wall portion 16i was taken as the surface roughness of the surface.
- the arbitrary three locations are not limited to this, in the embodiment, as shown in FIG. 3, three lines L1, L2, and L3 extending in the H direction are drawn at regular intervals on the side wall inner wall portion 16i.
- the distances in the Y direction between the front inner wall portion 14i and L1, between L1 and L2, between L2 and L3, and between L3 and the rear inner wall portion 15i are substantially equal.
- FIG. 4 shows the skewness Rsk of the electronic component container 1 (A, B, C, D, E, F) and the number (PCS) of the electronic components M adhered to the inner wall and remaining in the component container space 11. It is a graph showing the relationship between.
- the horizontal axis represents the skewness Rsk of the inner wall portion of the component storage space 11 of the electronic component storage container 1 (A, B, C, D, E, F), and the vertical axis represents the number of electronic components M remaining in the component storage space 11. is.
- the straight lines shown in the graph are approximate straight lines of the number of remaining electronic component containers 1 (A, B, C, D, E, and F).
- the number of electronic components M remaining in the component housing space 11 is 50 or less, which is the allowable range, when the skewness Rsk is ⁇ 0.5 or less, which is the range of the embodiment. rice field.
- Rsk By setting Rsk to a negative value, the flat surface is more likely to exist on the bottom of the valley, making it more difficult for the electronic component M to adhere to the inner wall of the component container.
- FIG. 5 shows the arithmetic average roughness Ra of the electronic component storage container 1 (A, B, C, D, E, F) and the number of electronic components M remaining in the component storage space 11 attached to the inner wall ( PCS) is a graph showing the relationship.
- the horizontal axis represents the arithmetic average roughness Ra ( ⁇ m) of the inner wall portion of the component storage space 11 of the electronic component storage container 1 (A, B, C, D, E, F), and the vertical axis represents the remaining in the component storage space 11. It is the number of electronic parts M that have been used.
- the arithmetic mean roughness Ra is 2.5 or less, which is the range of the embodiment, the number of electronic components M remaining in the component housing space 11 is 50 or less, which is the allowable range.
- FIG. 6 shows the root-mean-square roughness Rq of the electronic component storage container 1 (A, B, C, D, E, F) and the number of electronic components M remaining in the component storage space 11 attached to the inner wall.
- the horizontal axis represents the root-mean-square roughness Rq ( ⁇ m) of the inner wall portion of the component storage space 11 of the electronic component storage container 1 (A, B, C, D, E, F), and the vertical axis represents the inside of the component storage space 11.
- the root-mean-square roughness Rq is 2.5 or less, which is the range of the embodiment, the number of electronic components M remaining in the component housing space 11 is 50 or less, which is the allowable range. .
- the skewness Rsk in the inner wall portion forming the component housing space 11 is set to the range of ⁇ 0.3 or less of the embodiment, the number of electronic components M remaining in the component housing space 11 is allowed.
- the range can be 70 or less.
- the skewness Rsk is set to ⁇ 0.8 or more of the embodiment, the component housing space 11 can be easily manufactured.
- the arithmetic average roughness Ra of the inner wall portion forming the component housing space 11 is set to 3.5 ⁇ m or less, which is the range of the embodiment, the number of electronic components M remaining in the component housing space 11 is allowed.
- the range can be 70 or less.
- the root-mean-square roughness Rq of the inner wall portion forming the component housing space 11 is set to 4.5 ⁇ m or less, which is the range of the embodiment, the number of electronic components M remaining in the component housing space 11 can be reduced. It can be set to 70 or less, which is the allowable range.
- the root-mean-square roughness Rq is set to 1.8 ⁇ m of the embodiment, the component housing space 11 can be easily manufactured.
- the surface resistance value of the inner wall forming the component housing space 11 is 10 8 ⁇ /cm 2 or more and 10 10 ⁇ /cm 2 or less, the inner wall forming the component housing space 11 is less prone to power outages and static electricity does not occur. It is possible to prevent the electronic component M from adhering to the inner wall.
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Abstract
Description
以下、図面を参照しつつ本発明の実施形態に係る電子部品収容容器1について説明する。図1は、電子部品収容容器1を前方から見た正面図である。図2は、電子部品収容容器1を下方から見た底面図である。図3は、電子部品収容容器1の内部を一側方から見た図である。
容器本体10は、前後方向Lに延在する天板部12及び底板部13と、上下方向Hに延在する前壁部14及び後壁部15と、左右一対の側壁部16と、容器本体10の内部を上下に仕切る傾斜板部17と、を有する。後壁部15は、外面を形成する外側後壁部15aと、外側後壁部の前方の内側後壁部15bと、を含む。容器本体10の内部には、複数の電子部品Mをバラの状態で収容する部品収容空間11が形成されている。
本実施形態において、電子部品収容容器1において電子部品Mと接触する面である電子部品接触面の少なくとも一部は、所定範囲の表面粗さを有している。表面粗さは、スキューネスRsk、算術平均粗さRa又は二乗平均平方根粗さRqで表される。
電子部品接触面は、部品収容空間11を形成する内壁部と、排出口19の内面とを含み、また、部品収容空間11の外壁面を含んでもよい。内壁部は、左右一対の側壁部16の側壁内壁部16iと、傾斜板部17の傾斜面17iと、内側後壁部15bの後壁内壁部15iと、前壁部14の前壁内壁部14iと、天板部12の天板内壁部12iとを含む。
また、所定範囲の表面粗さを有する内壁部の少なくとも一部は、側壁内壁部16i及び傾斜面17iに加えて、後壁内壁部15iと、前壁内壁部14iとを含むことがより好ましい。
さらに、所定範囲の表面粗さを有する内壁部の少なくとも一部は、側壁内壁部16i、傾斜面17i、後壁内壁部15i及び前壁内壁部14iに加えて、天板内壁部12iを含むことがさらに好ましい。
電子部品収容容器1の部品収容空間11は、排出口19を開けると、電子部品Mが傾斜面17iを滑って、外部に流出する。しかし、電子部品収容容器1の内壁部に付着して流出されずに残ってしまう電子部品Mがある。内壁部の表面粗さが大きくなると、この残存個数は増加する傾向があるため、残存個数が、許容値の上限となる値を表面粗さの上限とした。
また、電子部品収容容器1の部品収容空間11の内壁部の表面粗さは、微小になっていくに伴い、製造工程の増加や製造コストが増加していく。このため、製造上許容できる値を下限とした。
部品収容空間11を形成する内壁部の少なくとも一部が有している所定範囲の表面粗さの一つとしてのスキューネスRskは、実施形態において、-0.8以上-0.3以下の範囲であることが好ましく、-0.76以上-0.38以下であることがより好ましい。
スキューネスRskは、平均線を中心としたときの山部と谷部との対称性を表す。Rsk=0のとき、平均線に対して対象で正規分布であり、図4に示す式で求められる。Rskに関する定義は、JIS B 0601に記載された規格に基づいている。Rskは、輪郭曲線(高さ曲線)の二乗平均平方根粗さRq(後述)の三乗によって無次元化した、基準長さにおいて、平均線を中心にした振幅である高さ曲線Z(x)の三乗平均を表している。Rskは、高さ曲線の確率密度関数について、非対称性の度合を示している。図4に示す式のl(エル)は、高さ曲線の特性を求めるために用いる高さ曲線のX軸方向長さである。Z(x)は、任意位置xにおける高さであり、縦座標値である。Rsk>0のとき、平均線に対して下側に偏っており、Rsk<0のとき、平均線に対して上側に偏っている。なお、スキューネスRskは、トライボロジー(摩擦)と関係が深いパラメータである。
また、部品収容空間11を形成する内壁部の少なくとも一部が有している所定範囲の表面粗さの一つとしての算術平均粗さRaは、実施形態において、1.5μm以上3.5μm以下の範囲であることが好ましい。
算術平均粗さRaは、平均面からの平均的な高低差の平均値である。高さ曲線からその平均線の方向に基準長さだけを抜き取り、この抜き取り部分の平均線の方向にX軸を、縦倍率の方向にZ軸を取り、高さ曲線をZ(x)で表したときに、図5に示す式によって求められる。
さらに、部品収容空間11を形成する内壁部の少なくとも一部が有している所定範囲の表面粗さの一つとしての二乗平均平方根粗さRqは、実施形態において1.8μm以上4.5μm以下の範囲であることが好ましい。二乗平均平方根粗さRqは、表面の任意位置xにおける高さであるZ(x)の二乗平均平方根を表した高さ分布の標準偏差に相当するもので、図6に示す式によって求められる。統計的な取り扱いが容易でかつ、ゴミ、キズ、ノイズなどの外乱の影響を受けにくいため、安定した結果を得ることができる。
なお、Rqは、Raより大きいことが好ましく。この場合、表面粗さはより粗になっている。
ABS樹脂で製造された表面粗さの異なる複数の電子部品収容容器1(A,B,C,D,E,F)を用意した。表面粗さは、成型金型の表面へのブラスト処理で調節し、ブラスト時の粒子サイズ、時間で調節する。スキューネスRskは、粒子サイズの異なる2回のブラスト処理を行い、谷部の深さを調節する。
それぞれの電子部品収容容器1(A,B,C,D,E,F)において、スキューネスRsk、算術平均粗さRa及び二乗平均平方根粗さRqを測定した。なお、電子部品収容容器1(A,B,C,D,E,F)の表面抵抗値は108Ω/cm2以上1010Ω/cm2以下であり、樹脂としては比較的帯電しにくい。
部品収容空間11を形成する内壁部における表面粗さの測定箇所は、電子部品Mとの接触面積が最も多い内壁部で行った。実施形態で電子部品Mとの接触面積が最も多い内壁部は2つの側壁内壁部16iであり、そのうちの一方で行った。なお、実施形態においては、部品収容空間11を形成する内壁部は全て同様に製造しているので、全ての内壁部が略等しい表面粗さを有している。
任意の3か所は、これに限定されないが、実施形態では図3に示すように、側壁内壁部16iにおいて等間隔にH方向に延びる3本の線をL1,L2,L3を引く。ここで、前壁内壁部14iとL1との間、L1とL2との間、L2とL3との間、L3と後壁内壁部15iとの間のY方向の距離は略等しい。
3本の線L1,L2,L3における、傾斜面17iから、傾斜面17iと天板内壁部12iとの間の距離の約1/3の位置を中心として、傾斜面17iと平行に延びる長さ4mmの直線m1,m2,m3を引く。この直線m1,m2,m3上の表面粗さをそれぞれ測定し、さらに、その測定された表面粗さを平均した値を電子部品収容容器1(A,B,C,D,E,F)それぞれの表面粗さとした。
グラフに示すように、近似直線上において、スキューネスRskが、実施形態の範囲である-0.5以下において、部品収容空間11内に残存した電子部品Mの個数は許容範囲の50個以下であった。Rskを負の値とすることで、平面は谷底面で存在することが多くなり、より電子部品Mは部品収容容器の内壁部に付着しにくい。
グラフに示すように、算術平均粗さRaが、実施形態の範囲である2.5以下において、部品収容空間11内に残存した電子部品Mの個数は許容範囲の50個以下であった。
グラフに示すように、二乗平均平方根粗さRqが、実施形態の範囲である2.5以下においては、部品収容空間11内に残存した電子部品Mの個数は許容範囲の50個以下であった。
1 電子部品収容容器
10 容器本体
11 部品収容空間
12 天板部
12i 天板内壁部
13 底板部
14 前壁部
14i 前壁内壁部
15 後壁部
15i 後壁内壁部
16 側壁部
16i 側壁内壁部
17 傾斜板部
17i 傾斜面
19 排出口
30 シャッター部材
Claims (7)
- 複数の電子部品を収容する部品収容空間と、
前記部品収容空間に収容されている前記電子部品を外部に排出する排出口と、を備える電子部品収容容器であって、
前記部品収容空間を囲む内壁部のスキューネスRskが、-0.8以上-0.3以下である、
電子部品収容容器。 - 前記部品収容空間を囲む内壁部のスキューネスRskが、-0.76以上-0.38以下である、請求項1に記載の電子部品収容容器。
- 前記内壁部の算術平均粗さRaが、1.5μm以上3.5μm以下である、
請求項1又は請求項2に記載の電子部品収容容器。 - 前記内壁部の二乗平均平方根粗さRqが、1.8μm以上4.5μm以下である、
請求項1から請求項3のいずれか1項に記載の電子部品収容容器。 - 表面抵抗値が108Ω/cm2以上1010Ω/cm2以下である、
請求項1から請求項4のいずれか1項に記載の電子部品収容容器。 - 前記内壁部は、前記部品収容空間を囲む全ての内壁部の少なくとも一部である、
請求項1から請求項5のいずれか1項に記載の電子部品収容容器。 - 前記内壁部は、前記部品収容空間を囲む全ての内壁部うちの、前記電子部品と接する面積の最も大きい内壁部を含む、
請求項1から請求項6のいずれか1項に記載の電子部品収容容器。
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EP1391394A4 (en) * | 2001-05-28 | 2012-10-03 | Denki Kagaku Kogyo Kk | CONTAINER FOR ELECTRONIC COMPONENTS |
DE112018004255T5 (de) * | 2017-09-27 | 2020-05-07 | Murata Manufacturing Co., Ltd. | Lagerbehälter für Elektronikkomponenten und Elektronikkomponentenreihe |
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- 2022-11-07 WO PCT/JP2022/041338 patent/WO2023135909A1/ja active Application Filing
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TWI847359B (zh) | 2024-07-01 |
JPWO2023135909A1 (ja) | 2023-07-20 |
US20240237320A1 (en) | 2024-07-11 |
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