JP5220709B2 - Filter carrier - Google Patents

Description

  The present invention relates to a filter carrier that carries a plurality of ventilation filters on a carrier tape.

  2. Description of the Related Art Conventionally, for example, an automobile electrical component such as an automobile ECU (Electrical Control Unit), a motor, a lamp, and a sensor, a household appliance such as an electric toothbrush, a shaver, and a mobile phone, a solar battery, etc. An opening is provided in the body for the purpose of alleviating pressure fluctuation in the housing or ventilating the inside of the housing, and the opening is closed with a ventilation filter. The ventilation filter prevents intrusion of foreign matter into the casing while ensuring ventilation inside and outside the casing.

  For example, as shown in FIG. 3 of Patent Document 1, such a ventilation filter may be directly attached to the casing, or as shown in FIG. 5 of Patent Document 1, a support body attached to the casing. It may be affixed to.

JP 2008-237949 A

  By the way, in order to mass-produce the case or support body to which the ventilation filter is attached, it is conceivable to configure a system as shown in FIG. That is, a filter carrier 10 in which a ventilation filter 30 is carried on a carrier tape 20 is prepared, and the filter carrier 10 is wound around a core 51 to form a reel. The carrier tape 20 is wound around a winding roll 53 after traveling along a knife-edge-shaped peeling table 52. In addition, an appropriate tension is applied to the carrier tape 20 by the tension roller 54. When the take-up roll 53 is rotated, the filter carrier 10 is pulled out from the reel, and the ventilation filter 30 is peeled off from the carrier tape 20 at the tip of the peeling table 52.

  On the other hand, the opening 7 serving as a housing or a support is placed on the placement table 63. The ventilation filter 30 partially separated from the carrier tape 20 is picked up by the suction nozzle 61 and then conveyed onto the opening 7. Thereafter, the ventilation filter 30 is attached to the opening 7 by, for example, an ultrasonic welder 62.

  However, in the system as shown in FIG. 5, when a low-rigidity ventilation filter 30 is used, the ventilation filter 30 is difficult to peel off from the carrier tape 20, and the possibility of defective pickup increases. Specifically, a phenomenon occurs in which the ventilation filter 30 is folded back following the carrier tape 20 at the tip of the peeling table 52. In order to prevent this, it is conceivable to increase the tension applied to the carrier tape 20, but the system configuration becomes complicated to enable such tension control. Further, if the tension applied to the carrier tape 20 is excessively increased, the ventilation filter 30 carried on the carrier tape 20 may be deformed.

  In view of such circumstances, an object of the present invention is to provide a filter carrier that can satisfactorily peel the ventilation filter from the carrier tape without increasing the tension applied to the carrier tape.

  The inventors of the present invention have made extensive studies to achieve the above object, and as a result, if a through hole is formed in a region of the carrier tape covered with the ventilation filter, the peelability of the ventilation filter from the carrier tape is improved. I found out. That is, in the conventional carrier carrier 10 as shown in FIG. 6, since the ventilation filter 30 overlaps the carrier tape 20 over the entire surface, the carrier tape is perforated and overlapped with the ventilation filter of the carrier tape. I came up with a weakening of the rigidity. The present invention has been made from such a viewpoint.

  That is, the present invention comprises a carrier tape extending in a predetermined direction, and a plurality of ventilation filters carried in a state aligned with the carrier tape in the predetermined direction, and the carrier tape includes a plurality of ventilation filters. Provided is a filter carrier in which a through hole is provided in an area to be covered.

  According to said structure, the rigidity of the part which overlaps with the ventilation filter of a carrier tape is weakened by the through-hole provided in the carrier tape. Therefore, when the carrier tape is caused to travel along the peeling table, the ventilation filter can be favorably peeled from the carrier tape without increasing the tension applied to the carrier tape.

(A) is a top view of the filter carrier which concerns on one Embodiment of this invention, (b) is the IB-IB sectional view taken on the line of (a). It is sectional drawing of the filter carrier with which the ventilation filter was carry | supported by the carrier tape via the double-sided tape. (A) is a top view of the filter carrier of a modification, (b) is the IIIB-IIIB sectional view taken on the line of (a). It is a figure which shows the peeling test method. It is a schematic block diagram of a production system. It is a top view of the conventional filter carrier.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, since the filter carrier of the present invention is suitably used in the production system shown in FIG. 5 described in the “Problems” section, it will be described below with reference to FIG.

  As shown in FIG. 5, the filter carrier 1 according to an embodiment of the present invention includes a carrier tape 2 extending in a predetermined direction and a plurality of ventilation filters 3 carried on the carrier tape 2. Hereinafter, in the present specification, for convenience of explanation, the predetermined direction, that is, the longitudinal direction of the carrier tape 2 is referred to as the X direction, and in particular, one side thereof (the side that is the traveling direction of the carrier tape 2 in FIG. 5). The + X direction is called the opposite direction.

  The filter carrier 1 is preferably a reel as shown in FIG. In order to form such a reel, the end of the carrier tape 2 in the −X direction is fixed to the core body 51, and the filter carrier 1 is wound around the core body 51. That is, the + X direction is also a direction in which the filter carrier 1 is pulled out from the reel.

  The ventilation filter 3 is carried on the carrier tape 2 in a state of being aligned in the X direction. The ventilation filters 3 are preferably arranged in a line on a straight line, but may be arranged in a staggered pattern, for example.

  The carrier tape 2 has a relatively weak adhesive force on the surface on which the ventilation filter 3 is supported, and supports the ventilation filter 3 by the adhesion force.

  As such a carrier tape 2, what apply | coated the adhesive to the base material can be used. Examples of the base material include PET (polyethylene terephthalate) and polyester such as polybutylene terephthalate, polyolefin such as polypropylene, polyethylene, and polymethylpentene, resin films such as polycarbonate, fine paper, coated paper, impregnated paper, and synthetic paper. It can be made of paper or metal foil such as aluminum or stainless steel. As the adhesive, for example, an acrylic adhesive can be used.

  The thickness of the carrier tape 2 is preferably 0.01 to 0.1 mm, and more preferably 0.02 to 0.08 mm.

  As will be described later, when the air-permeable filter 3 is carried on the carrier tape 2 using the double-sided tape 4, the carrier tape 2 can be configured only by a base material to which no adhesive is applied.

  Each ventilation filter 3 is not particularly limited in structure and material as long as it allows permeation of gas. As the ventilation filter 3, a filter including a resin porous membrane can be suitably used. As the resin porous membrane, a fluororesin porous membrane or a polyolefin porous membrane that can be produced by a known stretching method or extraction method can be used. Fluororesin includes PTEF (polytetrafluoroethylene), polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-ethylene copolymer Etc. Examples of the monomer constituting the polyolefin include ethylene, propylene, 4-methylpentene-1,1 butene, and the like, and polyolefins obtained by polymerizing or copolymerizing these monomers alone can be used. Moreover, the nanofiber film porous body using polyacrylonitrile, nylon, polylactic acid, etc. can also be used. Among these, a porous PTFE membrane that has a small area and can ensure air permeability and has a high function of preventing water and dust from entering the housing is preferable. For example, a PTFE porous membrane having a Gurley value of 0.1 to 500 sec / 100 mL, a water pressure resistance of 1.0 kPa or more, and a single thickness of 1 μm to 5 mm can be used.

  The resin porous film may be subjected to a liquid repellent treatment. The liquid repellent treatment can be performed by applying a liquid repellent to the resin porous film, drying and curing. The liquid repellent is only required to form a film having a surface tension lower than that of the resin porous film. For example, a liquid repellent containing a polymer having a perfluoroalkyl group is suitable. The liquid repellent can be applied by dipping or spraying.

  The resin porous membrane may be laminated with a breathable support material on one side or both sides. By providing such a breathable support material, a high-strength breathable filter 3 can be obtained. The breathable support material is preferably a material that is more breathable than the porous resin membrane. Specifically, a woven fabric, a nonwoven fabric, a net, a mesh, or the like can be used as the breathable support material, and examples of the material include polyester, polyethylene, and aramid resin.

  The resin porous membrane and the air-permeable support material are joined by a usual method such as heat welding or adhesion with an adhesive. The resin porous membrane and the breathable support material are partially joined, and the area of the joined portion is preferably 5 to 20% of the total area. This is because if the area of the joint portion is less than 5% of the total area, the resin porous membrane and the air-permeable support material are easily peeled off, and if it exceeds 20%, the water pressure resistance is lowered. Moreover, it is preferable that the junction part is uniformly disperse | distributed with respect to the whole area.

  The thickness of each ventilation filter 3 is preferably 0.02 to 1 mm. When the thickness of the ventilation filter 3 is less than 0.02 mm, there is no stiffness, and workability when handling the ventilation filter 3 is deteriorated. When the thickness exceeds 1 mm, the unevenness of the filter carrier 1 is increased to form a reel shape. Because it becomes difficult. A more preferable thickness of the ventilation filter 3 is 0.05 to 0.3 mm.

  In the present embodiment, each ventilation filter 3 has a circular shape as shown in FIG. However, the shape of the ventilation filter 3 is not particularly limited, and may be a polygonal shape such as a square shape or a hexagonal shape.

  The ventilation filter 3 may be carried directly on the carrier tape 2 as shown in FIG. In this case, as shown in FIG. 5, the ventilation filter 3 is picked up by the suction nozzle 61, transported onto the opening 7, and then attached to the opening 7 by, for example, ultrasonic welding by the ultrasonic welding machine 62. .

  Or the ventilation filter 3 may be carry | supported by the carrier tape 2 via the double-sided tape 4, as shown in FIG. Specifically, an annular double-sided tape 4 is attached to the surface of each ventilation filter 3 on the carrier tape 2 side along the peripheral edge of the surface. In this case, after the ventilation filter 3 is conveyed onto the opening body 7 by the suction nozzle 61, the ventilation filter 3 is attached to the opening body 7 by the double-sided tape 4 by being pressed from above, for example.

  The double-sided tape 4 is not particularly limited as long as the double-sided tape 4 has adhesive force on both sides, and for example, a double-sided tape 4 having an acrylic or silicone adhesive applied to both sides of a support layer such as a PET base or nonwoven fabric can be used. .

  The ventilation filter 3 is not necessarily attached to the opening 7, and may be attached to the opening 7 by being integrally molded with resin after being picked up by the suction nozzle 61, for example.

  Furthermore, in this embodiment, the through hole 2a is provided in the area | region (area) covered with each of the ventilation filter 3 in the carrier tape 2, and the surface at the side of the carrier tape 2 of the ventilation filter 3 is exposed through this through hole 2a. doing. In the present embodiment, the through hole 2a has a circular shape, and the center of the through hole 2a matches the center of the ventilation filter 3.

  The polymerization allowance between the carrier tape 2 and the ventilation filter 3 around the through hole 2a is preferably 0.1 mm or more. This is because if the polymerization allowance is less than 0.1 mm, the ventilation filter 3 may be fitted into the through hole 2a. A more preferable polymerization allowance is 1.0 mm or more.

  As described above, in the filter carrier 1 of this embodiment, the rigidity of the portion of the carrier tape 2 that overlaps with the ventilation filter 3 is weakened by the through hole 2 a provided in the carrier tape 2. Therefore, when the carrier tape 2 is run along the peeling table 52 (see FIG. 5), the ventilation filter 3 can be favorably peeled from the carrier tape 2 without increasing the tension applied to the carrier tape 2. Such a filter carrier 1 is effective particularly when the ventilation filter 3 has a small rigidity (for example, when the ventilation filter is a single-layer PTFE porous membrane).

  In the above embodiment, the through hole 2a has a circular shape, and the center of the through hole 2a and the center of the ventilation filter 3 coincide with each other. However, the shape of the through hole 2a and the through hole 2a and the ventilation filter 3 However, the positional relationship is not limited to this.

  For example, as shown in FIGS. 3A and 3B, the through-hole 2a is located at a position close to the + X direction (that is, the direction in which the filter carrier 1 is pulled out from the reel) when viewed from the center of the ventilation filter 3. There may be. With such a positional relationship, while reducing the polymerization area of the ventilation filter 3 and the carrier tape 2 on the + X direction side of the through hole 2a and improving the peelability of the ventilation filter 3, the −X of the through hole 2a is improved. A large polymerization area between the ventilation filter 3 and the carrier tape 2 can be secured on the direction side, and the ventilation filter 3 can be supported with a strong force.

  3 (a) and 3 (b), the through hole 2a has a substantially semicircular shape with rounded corners of the semicircle, but the positional relationship shown in FIGS. 3 (a) and 3 (b). Even in this case, the through hole 2a may be circular.

  In addition, it is preferable that the through-hole 2a has a shape that forms a circular arc that is convex toward the + X direction so that peeling of the ventilation filter 3 starts smoothly. Specific examples of the shape of the through hole 2a include a circular shape as shown in FIG. 1A and a substantially semicircular shape as shown in FIG.

  Or even if it makes the shape of the through-hole 2a square, for example, the diagonal direction is the X direction, it is needless to say that substantially the same effect as that of the above embodiment can be obtained.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not restrict | limited to these Examples at all.

(Example)
As a film for producing a ventilation filter, a 0.2 mm thick Nitto Denko Temish (a 0.08 mm thick PTFE porous film laminated with a PET non-woven fabric) was prepared and cut into a 10 mm diameter circular shape. Thus, a ventilation filter was produced.

  As a carrier tape, a base material made of PET and coated with an acrylic adhesive on a 0.08 mm thick substrate was used, and circular through-holes with a diameter of 8 mm were formed on the carrier tape. The ventilation filter is supported on the carrier tape so that the center of the through hole and the center of the ventilation filter coincide (that is, the polymerization margin between the carrier tape and the ventilation filter around the through hole is 1 mm). A filter carrier was obtained (Example 1).

  On the carrier tape, a semicircular through hole having a semicircle with a radius of 3 mm and rounded corners is formed so that a straight line portion passing through the center of the arc is perpendicular to the longitudinal direction of the carrier tape. Except that the ventilation filter is supported on the carrier tape so that the center of the arc matches the center of the ventilation filter (that is, the polymerization margin between the carrier tape and the ventilation filter around the through hole is 1 mm or more). A filter carrier was obtained in the same manner as in Example 1 (Example 2).

(Comparative example)
A filter carrier was obtained in the same manner as in Example 1 except that the through hole was not formed in the carrier tape.

(Peel test)
The filter carriers of Examples 1 and 2 and the comparative example were run while being pulled with a constant tension 90 degrees directly below the tip of the peeling table shown in FIG. 4 (the traveling direction is shown in FIGS. + X direction shown in a). The angle of the peeling table was 30 degrees, and the tip was a curved surface with a radius of 0.3 mm. The above running was performed while changing the tension, and the tension at which the ventilation filter was peelable from the carrier tape was measured.

  As a result of this peeling test, in the comparative example, a tension of 1.96 N was required to peel off the ventilation filter. On the other hand, in Examples 1 and 2, the peelable tension was suppressed to 1.47 N or less. In particular, it was confirmed that in Example 2 in which the through hole was close to the traveling direction side of the carrier tape, the ventilation filter was more stably separated than in Example 1.

  The ventilation filter in the filter carrier of the present invention can be used for, for example, outdoor lamps such as outdoor lamps and lamps for trains, in addition to automobile electrical components, home appliances, and solar cells.

DESCRIPTION OF SYMBOLS 1 Filter carrier 2 Carrier tape 2a Through-hole 3 Ventilation filter 4 Double-sided tape

Claims (9)

A carrier tape extending in a predetermined direction;
A plurality of ventilation filters carried by the adhesive force of the adhesive in a state aligned in the predetermined direction on the carrier tape,
A filter carrier, wherein the carrier tape is provided with a through hole in a region covered with each of the ventilation filters.   2. The filter carrier according to claim 1, wherein the through hole is at a position close to one side in the predetermined direction when viewed from the center of the ventilation filter.   The filter carrier according to claim 2, wherein the filter carrier is wound into the reel in the predetermined direction, and one side of the predetermined direction is a direction in which the filter carrier is pulled out from the reel. body.   The filter carrier according to any one of claims 1 to 3, wherein a polymerization margin between the carrier tape and the ventilation filter around the through hole is 0.1 mm or more.   The filter carrier according to any one of claims 1 to 4, wherein the through hole has a shape forming an arc that is convex toward one side in the predetermined direction. The filter carrier according to any one of claims 1 to 4 , wherein the through hole has a circular shape or a substantially semicircular shape.   Each of the said ventilation filter is a filter carrier as described in any one of Claims 1-6 containing a resin porous membrane.   8. The filter carrier according to claim 7, wherein each of the ventilation filters further includes an air-permeable support member laminated on the resin porous membrane.   The filter carrier according to any one of claims 1 to 8, wherein an annular double-sided tape is attached to a surface of each of the ventilation filters on the carrier tape side along a peripheral edge portion of the surface. .

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