JP2013169748A - Window structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a window structure for a vehicle forming a rubbery section into a complicated shape and stably maintaining airtightness.SOLUTION: A window structure 1 includes a window body 2 having transparency allowing transmission of light, a frame 3 laminated on one surface of the peripheral section of the window body 2 and including a thermoplastic resin, a solid elastic member 4 laminated on the surface opposite to the window body 2 of the frame 3, and a laser welding section 5 where the frame 3 and the solid elastic member 4 are laminated, the frame 3 is molten by a laser, and the frame 3 and the elastic member 4 are adhered to each other.

Description

  The present invention relates to a vehicle window structure attached to a vehicle body such as an automobile.

  The vehicle window structure includes, for example, a sheet-like object (window main body), a frame, and a rubber buffer layer (see Patent Document 1). The sheet-like material is molded from a polycarbonate-based resin and has transparency to transmit light. A frame is laminated | stacked on the single side | surface of the peripheral part of a sheet-like thing, and is shape | molded from resin. The rubber buffer layer is formed of a polyurethane-based adhesive, and is applied directly to the frame or applied via a primer and cured to be bonded to the frame. The rubber-like buffer layer is also adhered to the vehicle body side to make the space between the sheet-like material and the vehicle body airtight. The vehicle body and the sheet-like material have a difference in coefficient of thermal expansion, and a difference in deformation amount may occur due to heat, but at that time, the rubber buffer layer may elastically deform. Therefore, the airtightness between the vehicle body and the sheet-like material can be stably maintained by the rubber buffer layer.

JP 2004-359220 A

  However, there has been a demand for a vehicle window structure that has a rubber-like portion in a complicated shape and that can stably maintain airtightness.

  In order to solve the above-mentioned problems, the present invention is a vehicle window structure having a configuration as described in each claim. According to one feature, the vehicle window structure includes a window main body having transparency for transmitting light, a frame laminated on one side of a peripheral portion of the window main body and including a thermoplastic resin, and an opposite side surface of the frame main body. A solid elastic member to be laminated, and a laser welding portion for laminating the frame and the solid elastic member and melting the frame by a laser to bond the frame and the elastic member.

  Therefore, the frame and the elastic member are bonded by the laser welding portion. Therefore, it is not necessary to bond the frame 3 and the elastic member 4 with an adhesive 10 such as a primer as shown in FIG. The adhesive 10 such as a primer deteriorates with time due to ultraviolet rays, oxidation, hydrolysis, heat, or the like, and causes a decrease in airtightness between the frame 3 and the elastic member 4. However, according to the present invention, the adhesive between the frame and the elastic member can be omitted to avoid a decrease in airtightness caused by the deterioration with time.

  The elastic member can be elastically deformed when, for example, a difference in coefficient of thermal expansion between the vehicle body and the frame occurs. Therefore, the airtightness between the vehicle body and the frame can be stably maintained by the elastic member. Since the elastic member is installed in the frame in a solid state, the elastic member may have a complicated shape as compared with a case where the elastic member is applied to the frame with a sol-like adhesive or the like. Thereby, the airtightness or design property by an elastic member can be improved.

It is sectional drawing of a window structure. It is sectional drawing of the window structure of a comparative example.

  One embodiment of the present invention will be described with reference to FIG. As shown in FIG. 1, the vehicle window structure 1 is mounted on a vehicle body 8 such as an automobile and closes an opening 8 a of the vehicle body 8. The opening 8a is formed in the ceiling, rear, side, etc. of the vehicle body 8, and the window structure 1 forms a ceiling window, a rear window, and a side window. The vehicle body 8 has an annular vehicle body frame member 8b located on the outer periphery of the opening 8a. The vehicle body frame member 8b is made of metal, and has a concave portion 8c that opens outward along the outer surface of the outer periphery of the opening 8a. The vehicle body frame member 8b integrally includes a thin annular inner peripheral portion 8d and a thick annular outer peripheral portion 8e.

  The window structure 1 includes a laminated window main body 2, a frame 3, and an elastic member 4. The window body 2 is plate-shaped and has transparency to transmit light. The window body 2 is made of resin, glass or the like. The window body 2 preferably contains a thermoplastic resin such as polycarbonate, acrylic, or cycloolefin polymer. The window body 2 has a front surface 2a disposed on the outside of the vehicle body 8 and a back surface 2b disposed on the vehicle compartment side. The outer peripheral part 2c of the window body 2 is fitted into the recess 8c of the vehicle body frame member 8b.

  The frame 3 has a plate shape and a ring shape, and faces one side (back surface 2 b) of the outer peripheral portion 2 c of the window body 2. The frame 3 includes a thermoplastic resin such as polycarbonate and PET (polyethylene terephthalate). The frame 3 may include a fiber reinforcing material such as glass fiber in a thermoplastic resin.

  The frame 3 has a color that can block the transmission of ultraviolet rays. The color of the frame 3 is, for example, black, gray, or dark green. The color of the frame 3 may be provided on the entire frame 3, the surface of the frame 3, or a part of the frame 3 to form a pattern or the like. The frame 3 has a surface 3a facing the window body 2 and a back surface 3b opposite to the surface 3a.

  The elastic member (mole) 4 is solid and has elasticity. The elastic member 4 is preferably made of resin, rubber or the like and includes a thermoplastic member. The elastic member 4 is preferably formed from an elastomer having rubber elasticity at normal temperature (0 to 30 ° C.), and more preferably formed from a thermoplastic elastomer. The thermoplastic elastomer may include one or more of styrene, olefin, vinyl chloride, polyurethane, polyamide.

  The elastic member 4 is laminated on the back surface 3b of the frame 3 in a solid state that is not a gel. The elastic member 4 integrally includes an elastic main body 4a located on the back side of the frame 3 and an outer peripheral portion 4b standing on the outer peripheral edge of the elastic main body 4a. The outer peripheral portion 4b covers the outer peripheral surface of the frame 3 and the outer peripheral surface of the window main body 2, and is positioned between the frame 3 and the vehicle body frame member 8b and between the window main body 2 and the vehicle body frame member 8b. The elastic body 4a has a front surface 4c facing the back surface 3b of the frame 3 and a back surface 4d facing the vehicle body frame member 8b. The elastic member 4 is disposed at 80% or more of the outer periphery of the window body 2 and the frame 3 or on the entire periphery.

  A laser welding portion 5 is provided between the frame 3 and the elastic member 4. The laser welding part 5 is formed by laminating the frame 3 and the elastic member 4 and irradiating the laser. The laser is irradiated from the front side of the frame 3, preferably from the front side of the window body 2 to the back side (lower side in FIG. 1), or from the back side of the elastic member 4 to the front side (upper side in FIG. 1).

  The laser welded portion 5 is formed by the thermoplastic resin of the frame 3 being melted (including a softened state) by the laser and cooled and hardened. The laser welded portion 5 is preferably formed by melting the thermoplastic resin of the frame 3 and the thermoplastic member of the elastic member 4 by laser, mixing them with each other, cooling and curing. Thereby, the laser welding part 5 adhere | attaches the back surface 3b of the frame 3, and the surface 4c of the elastic member 4. FIG. The laser welding portion 5 is disposed at 80% or more of the outer periphery of the frame 3, preferably the entire periphery.

  A second laser welding portion 6 is provided between the window body 2 and the frame 3. The second laser welding portion 6 is formed by laminating the window body 2 and the frame 3 and irradiating the laser. The laser is irradiated from the front side of the window body 2 to the back side (lower side in FIG. 1) or from the back side of the frame 3, preferably from the back side of the elastic member 4 to the front side (upper side in FIG. 1). The second laser welded part 6 may be formed by a laser different from the laser used when forming the laser welded part 5, and is preferably formed by the same laser.

  The second laser welded portion 6 is formed by the thermoplastic resin of the frame 3 being melted (including a softened state) by the laser, and cooled and cured. The second laser welded portion 6 is preferably formed by melting the thermoplastic resin of the window body 2 and the thermoplastic resin of the frame 3 with a laser, mixing them with each other, and cooling and hardening them. As a result, the second laser welding portion 6 bonds the back surface 2b of the window body 2 and the front surface 3a of the frame 3 together. The second laser welded portion 6 is formed at 80% or more of the outer periphery of the frame 3, preferably the entire periphery.

  As shown in FIG. 1, the window structure 1 integrally includes a window main body 2, a frame 3, and an elastic member 4, and is attached to the vehicle body 8 with an adhesive 7. The adhesive 7 is applied to the back surface 4d of the elastic member 4 or the surface of the inner peripheral portion 8d of the vehicle body frame member 8b. The window structure 1 is installed on the vehicle body frame member 8b, and the elastic member 4 is bonded to the vehicle body frame member 8b by the adhesive 7.

  The window main body 2 or the frame 3 has a difference in thermal expansion coefficient from the vehicle body frame member 8b. For example, when the window body 2 is made of polycarbonate and the vehicle body frame member 8b is made of metal, the thermal expansion coefficient of the window body 2 is larger than the thermal expansion coefficient of the vehicle body frame member 8b. When a difference in deformation occurs between the frame 3 and the vehicle body frame member 8b due to heat, the elastic member 4 can be elastically deformed. Thereby, the airtightness between the frame 3 and the vehicle body frame member 8 b can be maintained by the elastic member 4.

  As described above, the window structure 1 includes the window body 2 having transparency that transmits light, the frame 3 that is laminated on one side of the peripheral portion of the window body 2 and includes a thermoplastic resin, and the window body 2 of the frame 3. The solid elastic member 4 is laminated on the opposite side, and the frame 3 and the solid elastic member 4 are laminated, and the frame 3 is melted by a laser to bond the frame 3 and the elastic member 4.

  Therefore, the frame 3 and the elastic member 4 are bonded together by the laser welding portion 5. Therefore, it is not necessary to bond the frame 3 and the elastic member 4 with an adhesive 10 such as a primer as shown in FIG. The adhesive 10 such as a primer deteriorates with time due to ultraviolet rays, oxidation, hydrolysis, heat, or the like, and causes a decrease in airtightness between the frame 3 and the elastic member 4. However, in this embodiment, the adhesive between the frame 3 and the elastic member 4 can be omitted to avoid a decrease in airtightness due to the deterioration with time.

  The elastic member 4 can be deformed due to, for example, a difference in thermal expansion coefficient between the vehicle body 8 and the frame 3. Therefore, the airtightness between the vehicle body 8 and the frame 3 can be stably maintained by the elastic member 4. Since the elastic member 4 is installed in the frame 3 in a solid state, the elastic member 4 may have a complicated shape as compared with the case where the elastic member 4 is applied to the frame 3 with a sol-like adhesive or the like. Thereby, the airtightness or design property by the elastic member 4 can be improved.

  The window structure 1 includes a second laser welding portion 6 in which the frame 3 and the window main body 2 are stacked and the frame 3 is melted by the laser to bond the frame 3 and the window main body 2 together. Therefore, the laser weld 5 and the second laser weld 6 can be formed by the same laser.

  The window body 2 preferably contains a thermoplastic resin that is melted by a laser. It is preferable that the 2nd laser welding part 6 contains a part of window main body 2 fuse | melted with the laser. Therefore, the window main body 2 and the frame 3 are melted and mixed by the laser, so that the window main body 2 and the frame 3 can be securely bonded.

  The elastic member 4 preferably includes a thermoplastic elastomer that is melted by a laser. The laser welding part 5 preferably includes a part of the elastic member 4 melted by the laser. Therefore, the elastic member 4 and the frame 3 are melted and mixed by the laser, so that the elastic member 4 and the frame 3 can be securely bonded.

  Although the embodiments of the present invention have been described with reference to the above structure, it will be apparent to those skilled in the art that many alternations, modifications, and changes can be made without departing from the scope of the present invention. Accordingly, aspects of the invention may include all alterations, modifications, and changes that do not depart from the spirit and scope of the appended claims. For example, the form of the present invention is not limited to the special structure, and can be modified as follows.

  The window main body 2 and the frame 3 may be bonded together by the second laser welding portion 6 as shown in FIG. 1, or the window main body 2 and the frame 3 may be integrally formed by two-color molding. Alternatively, either one of the window main body 2 and the frame 3 may be molded first, and the molded one may be inserted into the other molding tool and insert molded. Alternatively, the window body 2 and the frame 3 may be formed separately, and the window body 2 and the frame 3 may be bonded by an adhesive or the like.

DESCRIPTION OF SYMBOLS 1 Window structure 2 Window main body 3 Frame 4 Elastic member 5 Laser welding part 6 Second laser welding part 7 Adhesive 8 Car body 8b Car body frame member 10 Adhesive

Claims (4)

A vehicle window structure,
A window main body having transparency for transmitting light, a frame laminated on one side of a peripheral portion of the window main body and containing a thermoplastic resin, and a solid elastic member laminated on the opposite side of the frame main body to the window main body And a window structure for a vehicle having a laser welded portion in which the frame and the solid elastic member are laminated and the frame is melted by a laser to bond the frame and the elastic member. The vehicle window structure according to claim 1,
A window structure for a vehicle having a second laser welding portion in which the frame and the window main body are stacked and the frame is melted by the laser to bond the frame and the window main body. The vehicle window structure according to claim 2,
The window body includes a thermoplastic resin melted by the laser;
The second laser weld portion is a vehicle window structure including a part of the window main body melted by the laser. The vehicle window structure according to any one of claims 1 to 3,
The elastic member includes a thermoplastic elastomer that is melted by the laser,
The laser welding part is a vehicle window structure including a part of the elastic member melted by the laser.

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