JP5372603B2 - Method and apparatus for joining skins of synthetic resin molded products - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for joining a skin of a synthetic resin molding which enable easy ultrasonic fusion of a folded end of a skin with an open periphery of a core material. <P>SOLUTION: The folded part 7A located on the skin 7 of the core material 6 is folded in the outward direction of the diameter of the opening 4A with individual presser pieces 16 by moving two or more movable split pieces 14 in the outward direction of the diameter of the opening 4A of the core material 6 on the other side of the core material 6 set on a jig 11 and pressed by individual presser pieces 16 and the periphery of the opening 4A so as to be drawn and fixed in the folding direction. In this state, the folded end is fused ultrasonically with the other side of the core material 6. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  In the present invention, when forming a synthetic resin molded article having a compatible skin stretched on one side surface of a core material made of a synthetic resin material, the skin is formed on the periphery of the opening provided in the core material. The present invention relates to a skin joining method and a skin joining apparatus for a synthetic resin molded article in which a wire is wound around and folded back to the other side surface of the core material, and the folded end portion is ultrasonically fused to the other side surface of the core material.

  FIG. 6 shows an automobile sun visor (hereinafter simply referred to as a sun visor) as a synthetic resin molded product. The sun visor 1 has a sun visor main body 2 and the sun visor main body 2 mounted on a vehicle interior roof. A sun visor bracket 3 is provided.

  The sun visor bracket 3 includes a base portion 3A fastened and fixed to a roof constituent member (not shown), and a round bar-like support bar 3B having one end rotatably connected to the base portion 3A in a substantially horizontal direction. The sun visor body 2 has an upper end portion connected to the support bar 3B so as to be rotatable about its axis.

  Further, a substantially semicircular cutout 4 is formed at the upper edge of the end of the sun visor body 2 opposite to the base 3A, and the support bar 3B is straddling the upper edge of the cutout 4. A locking bar 5 is provided on the substantial extension of the locking bar 5, and the locking bar 5 is configured to be detachably held by a holder member (not shown) disposed on the roof constituting member.

  As shown in FIG. 7, the sun visor body 2 includes a pair of plate-like core materials 6 and 6 made of a synthetic resin material arranged in line symmetry with a thin hinge portion 8 as a center, and these core materials 6. , 6 and a single skin 7 stretched over the surface.

  The skin 7 is made of a synthetic resin sheet that is compatible with the core material 6, and its peripheral edge is wrapped around the peripheral edge of the core material 6, 6 and folded back to the back surface of the core material 6, 6. The portions are joined to the back surfaces of the core members 6 and 6 by ultrasonic fusion, for example, in a linear form by an ultrasonic vibration generator (not shown).

  A substantially circular opening 4A is formed across the hinge portion 8 in a portion corresponding to the cutout portion 4 of the core materials 6 and 6, and a portion corresponding to the opening 4A in the skin 7 is a folded portion. 7A, a radial cut is made in the substantially central portion and folded back to the back side of the core members 6 and 6, and the folded end portion is wound on the back surface of the core materials 6 and 6 in the state where the periphery of the opening 4A is wound. Similarly, the terminal treatment is performed by ultrasonic welding and joining using an ultrasonic vibration generator.

  The support bar 3B and the locking bar 5 of the sun visor bracket 3 can be engaged with and disengaged from a plurality of bar holders 9 provided on the back surfaces of the core members 6 and 6 in the vicinity of the hinge portion 8, respectively. The support bar is movably engaged and held by folding the core members 6 and 6 in half at the hinge portion 8 and engaging the fastener portions (clip portions) 10 protruding from the back surfaces thereof. A sun visor 1 as shown in FIG. 6 is constructed in which 3B and the locking bar 5 are assembled with the core members 6 and 6 sandwiched therebetween. In FIG. 6, 2A denotes a vanity mirror.

  A similar technique of ultrasonic welding to the core materials 6 and 6 of the skin 7 is disclosed in Patent Document 1, for example.

Japanese Patent Laid-Open No. 2003-3000246

  The folded portion 7A of the skin 7 is folded from the opening 4A of the core material 6 to the back surface side of the core materials 6 and 6, and the folded end portion is placed on the back surface of the core materials 6 and 6 in the state where the periphery of the opening 4A is wound. When ultrasonic welding is performed, the end of the folded portion 7A is formed in the opening 4A so that the skin 7 is not loosened or wrinkled at the periphery of the notch 4 on the surface side of the sun visor body 2. Ultrasonic fusion must be performed manually by pulling the finger outward in the radial direction, and the joining operation becomes very difficult due to the fact that the opening 4A has a relatively small diameter.

  Accordingly, the present invention can easily ultrasonically weld the folded end portion of the skin to the peripheral edge portion of the opening of the core material, greatly improve workability, and automate the fusion work. The present invention provides a skin joining method and a skin joining apparatus for a synthetic resin molded product.

  In the method of joining the skin of the synthetic resin molded article of the present invention, the portion corresponding to the opening of the skin stretched on one side surface of the core material having an opening is used as the turning portion, and the turning portion is the periphery of the opening. Is wound on the other side surface of the core material, and the folded end portion is ultrasonically fused to the other side surface of the core material, and has an annular positioning portion that engages with the opening edge of the core material. Using a jig, with the skin facing the jig side, fitting a hole in the core material to the positioning part and setting the core material on the jig, and a substantially horizontal presser piece at the tip A plurality of movable divided pieces are inserted into the opening portion of the central portion of the positioning portion from the lower side of the jig, and each movable divided piece is operated in the radially outward direction of the opening to fold the skin with each presser piece. Part is folded back in the radially outward direction of the aperture and stretched, and the periphery of the aperture is wound to A step of pressing on the peripheral edge of the opening on the other side of the material, and a step of ultrasonically bonding the folded end to the other side of the core through work holes provided in the pressing pieces of the movable split pieces, respectively. The main feature is to include.

  Further, the synthetic resin molded article skin joining apparatus of the present invention uses the part corresponding to the opening of the skin stretched on one side surface of the core material having an opening as the turning part, and the turning part is the opening. Is a device for ultrasonically welding the folded end portion to the other side surface of the core material, having an opening portion penetrating in the vertical direction. An annular positioning portion that can be fitted and locked to the opening of the core member is projected from the upper surface side periphery of the core member, and the opening is fitted and locked to the positioning portion with the skin of the core member facing down. A jig capable of placing the core material, a plurality of movable divided pieces arranged on the opening portion of the jig so as to be movable in the vertical direction and the radial direction, and the movable divided piece in the vertical direction and the diameter. Drive mechanism that operates in a direction, and ultrasonic vibration that ultrasonically welds the folded end of the skin to the other side of the core. And the movable split piece is formed of a presser piece bent in a substantially horizontal manner at the upper end of the leg portion, and formed through the presser piece in the vertical direction, and the vibration of the ultrasonic vibration generator A contact hole has a work hole through which the contact piece can be inserted, and the presser piece is actuated radially outward of the opening at a position where the presser piece has passed through the opening of the core member. The main feature is that the outer periphery of the opening is stretched and stretched, the periphery of the hole is wound, and the folded end can be pressed and fixed to the other side of the core.

  According to the method and apparatus for joining a skin of a synthetic resin molded product of the present invention, the folded portion set on the skin of the core material has a plurality of movable divided pieces on the other side surface of the core material set on the jig. By moving the opening of the core member in the radially outward direction, the movable split piece is folded back by the presser piece in the radially outward direction of the aperture, and pressed by the presser piece and the peripheral edge of the aperture. The folded end portion can be ultrasonically welded to the other side surface of the core material in the stretched state.

  As a result, the operator does not have the trouble of manually performing ultrasonic fusion while pulling the folded end portion of the skin with a finger, and can easily perform the ultrasonic fusion operation of the folded end portion. The landing work can be automated.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic cross-sectional explanatory drawing which shows one Embodiment of the skin joining apparatus which enforces the method of this invention. The top view which shows the state which set the core material on the jig | tool. The schematic cross-section explanatory drawing which shows the joining aspect of the skin by the apparatus shown in FIG. 1 in order of the process of (A)-(D). The schematic cross-sectional explanatory drawing which shows the action | operation by the drive mechanism of a movable division | segmentation top | corner in order of the process of (A)-(C) according to the joining aspect of a skin. The top view which shows the example from which the holding piece of a movable division | segmentation top differs. The front view of the sun visor shown as an example of a synthetic resin molded product. The top view which shows the structure of the expansion | deployment back surface of the sun visor shown in FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  1 and 2 show an embodiment of a skin joining apparatus used in the skin joining method of the present invention.

  In this embodiment, as an example, the skin 7 of the core material 6 of the sun visor body 2 shown in FIGS. 6 and 7 is folded back to the back surface side of the core material 6 through the opening 4A provided in the core material 6, The case where the folded end portion is joined to the back surface of the core member 6 by ultrasonic fusion will be described.

  1 and 2 includes a jig 11 for placing a synthetic resin core 6 having a skin 7 stretched on one side surface (surface), and a jig 11 described later provided on the jig 11. A plurality of split movable pieces 14 are provided in the fenestration part 12 so as to be movable in the vertical direction and the radial direction.

  The jig 11 has an opening portion 12 penetrating in the vertical direction, and an annular positioning portion 13 that can be fitted and locked to the opening 4A of the core member 6 is provided on the upper surface side periphery of the opening portion 12. The core material 6 can be placed on the jig 11 by being protruded and fitting and locking the opening 4A to the positioning portion 13 with the skin 7 of the core material 6 facing down. ing.

  As shown in FIG. 7, the opening 4 </ b> A of the core member 6 is formed across a pair of core members 6, 6 that are integrally formed in a line symmetrical manner with a thin hinge portion 8 as a boundary. When the sun visor 1 shown in FIG. 6 is configured by folding the core members 6 and 6 in half at the hinge portion 8, the hole edges of the double-folded opening 4A are abutted with each other to form a substantially semicircular shape. The notch 4 is formed in a shape that is flanged up in a trumpet shape toward the back side of the core member 6.

  Therefore, in this embodiment, the positioning part 13 provided on the upper surface side periphery of the window part 12 of the jig 11 has a tapered shape having a curved outer peripheral surface that matches the trumpet shape of the opening 4A of the core member 6. Projected to

  The skin 7 stretched on the surface of the core material 6 is made of a synthetic resin sheet having compatibility with the core material 6, and the peripheral portion of the skin 7 is folded back to the back surface side of the core material 6 as described above. The periphery of the core material 6 is wound around, and the folded end is ultrasonically fused to the back surface of the core material 6 in, for example, a linear shape.

  A portion of the skin 7 corresponding to the opening 4A of the core material 6 is set as a folded portion 7A, and a radial cut is provided in the central portion of the folded portion 7A. It is made to be easy to return to the back side.

  Thereby, when the core material 6 is set (fixed) on the jig 11 by fitting and locking the opening 4A of the core material 6 to the positioning portion 13 with the skin 7 facing the jig 11 side, In the process, the folded portion 7A of the skin 7 is pushed up into the opening 4A along the curved outer peripheral surface by the positioning portion 13, and can be intimately adhered to the trumpet-shaped curved surface around the opening 4A. It becomes.

  On the other hand, the movable split piece 14 includes a leg portion 15 and a presser piece 16 which is bent substantially horizontally at the upper end of the leg portion 15, and the presser piece 16 includes an ultrasonic vibration generator 18 which will be described later. A work hole 17 into which the vibrating contact 18a can be inserted is formed so as to penetrate in the vertical direction.

  In the present embodiment, the presser piece 16 of the movable split piece 14 has a set outer diameter of the core 11 as shown in FIG. A substantially inscribed circular shape having a slightly smaller diameter than the opening 4A of the material 6 is divided into four parts to form four divided frames.

  In addition, the work hole 17 of each presser piece 16 is formed as a long hole bent along the bent corner portion of the outer edge of the presser piece 16, and the folded end portion of the folded portion 7A within the length range of the long hole. Ultrasonic fusion is possible.

  FIG. 4 shows the arrangement of the movable divided pieces 14. Each movable divided piece 14 has a cylinder mechanism 21 for radial operation as a drive mechanism in which a leg portion 15 is arranged on a movable plate 20. The movable split pieces 14 are operated in synchronization with each other by the cylinder mechanisms 21 in the radial direction of the opening 4A.

  The movable plate 20 is coupled to an end of an operating rod 22a of an elevating cylinder mechanism 22 as a driving mechanism arranged on the arrangement table 23 of the jig 11, and the operation of the elevating cylinder mechanism 22 is performed. Thus, the movable divided piece 14 is operated in the vertical direction within the window portion 12 of the jig 11.

  As the ultrasonic vibration generator 18, a known device in which a horn, a booster, and a converter are assembled in this order is used, and a plurality of the vibrating contactors 18 a are projected from the end of the horn. .

  The ultrasonic vibration generator 18 is movably disposed in the vertical direction and the horizontal direction above the jig 11 on the table 23.

  Next, a procedure (method) for folding and joining the folded portion 7A of the skin 7 around the opening 4A of the core member 6 using the skin joining apparatus having the above configuration will be described.

  First, as shown in FIG. 3A, the core material 6 is set on the jig 11 with its skin 7 facing down. At this time, by fitting and locking the opening 4A of the core material 6 to the positioning portion 13 of the jig 11, the folded portion 7A corresponding to the opening 4A of the core material 6 of the skin 7 as described above, The positioning portion 13 is pushed up to the back surface side (upper surface side in FIG. 3) of the core material 6 through the opening 4A.

  Next, the movable split piece 14 is raised by the lifting cylinder mechanism 22 to a position where the presser piece 16 passes through the opening 4A of the core member 6 as shown in FIG. The raised position of the presser piece 16 is a position where the lower surface of the presser piece 16 is slightly above the peripheral edge of the opening 4A, specifically, a height position corresponding to substantially half the thickness of the sheet thickness of the skin 7. Set to

  Subsequently, when the movable split piece 14 is operated in the radially outward direction of the opening 4A by the cylinder mechanism 21 for radial operation, the folded portion 7A of the skin 7 is moved to each presser piece 16 as shown in FIG. In the state of being hooked on the outer edge of the core member 6, it is folded back to the back surface side of the core member 6 starting from the peripheral edge of the opening 4 </ b> A. While being pressed by the end face (peripheral edge) of 4A and the lower surface of the presser piece 16, the end part is stretched in the same direction as the presser piece 16 is moved in the radially outward direction, and is fixed therebetween.

  Then, the ultrasonic vibration generator 18 is moved downward as shown in FIG. 3D with the folded end portion extended, and the vibrating contact 18 a is inserted into the work hole 17 of the presser piece 16. Ultrasonic vibration is generated by bringing the skin 7 into contact with the folded end portion of the skin 7, ultrasonic vibration is applied to the folded end portion, and this is ultrasonically fused to the back surface of the core material 6.

  In this embodiment, since the opening 4A of the core material 6 is formed so as to rise on the back surface side of the core material 6 as described above, the vibration contact is made near the peripheral edge portion of the opening 4A on the back surface of the core material 6. A fusion shelf 4B facing the child 18a is formed, and the folded end portion of the skin 7 is systematically fused to the surface of the fusion shelf 4B.

  Further, the ultrasonic welding by the vibrating contactor 18a is performed in the long hole range of the work hole 17 of the presser piece 16, and therefore the ultrasonic vibration generator 18 is fused by a horizontal rotation. Done.

  4A and 4B corresponds to the skin joining procedure shown in FIGS. 3A and 3B, and the movable divided piece 14 shown in FIG. 4C. The operation mode of corresponds to the skin joining procedure shown in FIGS.

  As described above, according to the skin joining method and the skin joining device of the present embodiment, the folded portion 7A set on the skin 7 of the core material 6 is on the other side surface side of the core material 6 set on the jig 11. By moving the plurality of movable divided pieces 14 in the radially outward direction of the opening 4A of the core member 6, the pressing pieces 16 of the movable divided piece 14 are folded back in the radially outward direction of the opening 4A. It is pressed by the piece 16 and the peripheral edge of the opening 4A and stretched and fixed in the folding direction, and the folded end can be ultrasonically fused to the other side surface of the core member 6 in this stretched state.

  This eliminates the hassle of manually performing ultrasonic welding while pulling the folded end portion of the skin 7 with a finger, making it easier to perform ultrasonic fusion work on the folded end portion, and further improving work efficiency. In addition to the improvement, automation of the ultrasonic fusion work can be realized.

  In the embodiment, as an example of performing the end treatment of the skin 7 in the substantially semicircular cutout portion 4 provided with the locking bar 5 of the sun visor 1, in the opening 4 </ b> A protruding in the trumpet shape on the back surface side of the core material 6. The folded portion 7A of the skin 7 is pushed up by the positioning portion 13 of the jig 11, and the folded portion 7A is folded outwardly of the opening 4A by the movable dividing piece 14, and the end portion thereof is ultrasonically fused to the back surface of the core material 6. Of course, the opening 4A can be used for the skin end treatment around the opening in the synthetic resin molded product formed by punching the flat core material 6.

  In this case, the presser pieces 16 of the plurality of movable division pieces 14 are moved in the radially inward direction to the opening portion 12 of the jig 11 as in the embodiment, and the outer diameter of the set is the core material 6. If the substantially inscribed circular shape having a diameter slightly smaller than the diameter of the opening 4A is divided into a plurality of divided pieces, the movable divided piece 14 is placed at a predetermined height position with the core material 6 set on the jig 11. As a result of the upward movement, the folded portion 7A of the outer skin 7 is pushed up to the back surface side through the opening 4A of the core member 6 at the outer edge of the assembled plurality of presser pieces 16, and the protruding positioning portion 13 in the embodiment is used. Since the required tension can be applied to the folded portion 7A as in the case, it is possible to reliably prevent the skin 7 around the opening 4A from being loosened or wrinkled on the surface side of the core material 6.

  Further, if a sawtooth portion 16a is formed on the outer edge of the presser piece 16 as a pulling means when the skin 7 is stretched as in the modification of the presser piece 16 shown in FIG. The shape portion 16a can bite into the outer skin 7 to effectively perform the pulling action (stretching action) of the folded end.

  As the pulling means, the same effect as described above can be obtained even if the back surface of the presser piece 16 (the surface on which the skin 7 is folded back) is formed as a filed rough surface.

  Note that the present invention is not limited to the embodiment intended for the sun visor, and can be used for the end terminal processing of the skin around the opening in various synthetic resin molded products as described above.

DESCRIPTION OF SYMBOLS 1 ... Sun visor 2 ... Sun visor main body 4 ... Notch part 4A ... Opening corresponding to a notch part 6 ... Core material 7 ... Skin 7A ... Folding part 11 ... Jig 12 ... Opening part 13 ... Positioning part 14 ... Movable division Top 15 ... Leg 16 ... Presser piece 16a ... Sawtooth (slip prevention means)
DESCRIPTION OF SYMBOLS 17 ... Work hole 18 ... Ultrasonic vibration generator 18a ... Vibrating contact 21 ... Radial direction cylinder mechanism (drive mechanism)
22 ... Elevating cylinder mechanism (drive mechanism)

Claims (4)

A portion corresponding to the opening of the skin stretched on one side surface of the core material having an opening is used as a folded portion, and the folded portion is folded around the periphery of the opening and folded to the other side surface of the core material. It is a method of ultrasonically welding the end to the other side of the core material,
Using a jig having an annular positioning portion that engages with an opening edge of the core material, the core material is fitted into the positioning portion with the skin facing toward the jig side, and the core material is fitted. A step of setting the jig on the jig,
A plurality of movable divided pieces having a substantially horizontal holding piece at the tip are inserted from the lower side of the jig into the opening portion of the central portion of the positioning portion, and each movable divided piece is operated in the radially outward direction of the opening. The folding portion of the outer skin is folded and stretched in the radially outward direction of the opening by each pressing piece, and the periphery of the opening is wound and the folded end is pressed against the opening periphery on the other side of the core. When,
And a step of ultrasonically welding the folded end to the other side surface of the core material through a work hole provided in each of the pressing pieces of each of the movable divided pieces. Method. A portion corresponding to the opening of the skin stretched on one side surface of the core material having an opening is used as a folded portion, and the folded portion is folded around the periphery of the opening and folded to the other side surface of the core material. An apparatus for ultrasonically welding the end to the other side of the core material,
An annular positioning portion that has an opening portion penetrating in the vertical direction and that can be fitted and locked in the opening of the core member is provided on the upper surface side periphery of the opening portion, and the skin of the core member is located below A jig that can place the core material by fitting and locking the opening to the positioning portion on the side,
A plurality of movable split pieces arranged to be movable in the vertical direction and the radial direction in the opening portion of the jig;
A drive mechanism for operating the movable split piece in the vertical direction and the radial direction;
An ultrasonic vibration generator that ultrasonically welds the folded end of the skin to the other side of the core, and
The movable split piece is a work piece that is formed in a presser piece that is bent substantially horizontally at the upper end of the leg part, and penetrates the presser piece in the vertical direction, and through which the vibration contact of the ultrasonic vibration generator can be inserted. A hole is provided, and the pressing piece is operated radially outward of the opening at a position where it passes through the opening of the core member, whereby the folded portion of the skin is folded outwardly of the opening. A synthetic resin-molded skin bonding apparatus characterized by being stretched and wound around the periphery of the hole and capable of pressing and fixing the folded end to the other side surface of the core material.   The pressing piece of the movable split piece is formed in such a manner that the outer diameter of the holding piece is slightly smaller than the opening diameter of the core member in the assembled state in which the holding piece is moved in the radially inward direction to the opening portion of the jig. The apparatus for joining skins of a synthetic resin molded product according to claim 2, wherein   The skin joining device for synthetic resin molded products according to claim 2 or 3, wherein a skin pulling means is provided on the pressing piece of the movable split piece.

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