JP2000052999A - Sticking structure and pad cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sticking structure that can firmly stick a stuck member such as an ornamental member to the base material of a pad cover or the like without producing a flaw or the like and a pad cover with the ornamental member firmly stuck thereto. SOLUTION: A plurality of guide grooves 60 are formed at a bottom part 56 of a fit-in part 52 of a pad cover body 42, and both longitudinal ends of these guide grooves 60 are communicated with air holes 58, 62 communicating the bottom part 56 with the back face side of the pad cover body 42. When an ornamental plate 54 is fitted into the fit-in part 52 and pressed to the bottom part 56 side, air between the bottom part 56 and an adhesive part 70 of the ornamental plate 54 moves and reaches the guide grooves 60 so as to pass through to the back face side of the pad cover body 42 through the vents 58, 62. The ornamental plate 54 is therefore stuck positively to the bottom part 56.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sticking structure for attaching a sticking member such as a decorative member to a base material such as a pad cover body provided on a steering wheel of a vehicle with an adhesive, and a method for attaching the same. It relates to the pad cover used.

[0002]

2. Description of the Related Art A vehicle manufacturer or vehicle name is provided on the surface of a pad cover that covers components of an airbag device such as an inflator and a bag, and components of a horn such as a horn switch at a substantially central portion of a steering wheel. Marks of various designs such as are provided. This type of mark is made by applying the above mark or the like to a decorating member formed separately from the pad cover, and forming a synthetic resin on at least one of the bottom of the thin concave portion formed on the pad cover and the back surface of the decorating member. An adhesive formed of a material is applied, a decorative member is fitted into the concave portion, and fixed by the adhesive.

[0003]

The above-described decorative member is securely fixed by being fitted into the concave portion and then pressed toward the bottom of the concave portion. As a pressing method at this time, there is a method of pressing the decorative member along the surface direction of the bottom of the concave portion by a press device or the like. However, in this method, there is a possibility that air remains between the decorating member and the bottom of the concave portion, and when air remains, the decorating member is not adhered at that portion, and as a result, the adhesive force is reduced. descend. On the other hand, there is a method in which a roller is rolled on a decorative member fitted into a concave portion and bonded by a pressing force from the roller. In this method, air between the decorating member and the bottom of the concave portion is extruded by the rolling of the roller, so that no air remains, but by rolling the roller, a scratch root remains on the surface of the decorating member. , The quality deteriorates.

In view of the above facts, the present invention provides a bonding structure and a bonding member for a decorative member which can firmly bond a bonding member such as a decorative member to a base material such as a pad cover without causing any damage. The purpose is to obtain a pad cover that is firmly worn.

[0005]

The sticking structure according to claim 1 is a sticking structure for sticking a sticking member formed separately from a base material to a surface of the base material. A base material side ventilation hole that communicates with a bonding portion of the base material to which the bonding member is bonded via a bonding unit having an adhesive force and a back side of the bonding portion, and the bonding portion. A guide groove that is formed and communicates with the air hole and guides air between the base material and the attaching member to the air hole is formed in the base material.

According to the sticking structure having the above-described structure, an adhesive means such as an adhesive is provided on at least one of the sticking portion of the base material and the sticking surface of the sticking member, and the sticking portion is attached to the sticking portion of the base material. When the attaching member is arranged, and in this state, the attaching member is pressed toward the attaching portion side (that is, the base material side) from the side opposite to the attaching portion via the attaching member, the attaching member and the base material are separated. The air therebetween passes through the base material side ventilation hole to the back side of the base material (that is, the side opposite to the sticking portion). Further, the air located at a position distant from the base material side ventilation hole moves between the base material and the attaching member by a compressive force when the attaching member is pressed, and reaches the guiding groove by reaching the guiding groove. Through the base material side ventilation hole to the back side of the base material. For this reason,
The contact area between the base material and the bonding member via the bonding means increases,
The sticking member can be firmly stuck to the sticking site of the base material. Also,
When the sticking member is pressed by a pressing means such as a punch of a press device, the pressing means is not moved in a direction other than the pressing direction, so that the sticking member is not damaged.

According to a second aspect of the present invention, there is provided the bonding structure according to the first aspect, wherein the bonding member-side ventilation hole for communicating the inside of the bonding member with the base material-side ventilation hole is provided. It is characterized by being formed on a member.

According to the sticking structure having the above structure, the inside and outside of the sticking member are communicated with each other through the sticking member side ventilation hole, and the sticking member is connected to the base material by the sticking member side ventilation hole. In the attached state, it is directly or indirectly communicated with the base material side ventilation hole via a guide groove. For this reason, the internal pressure of the sticking member is always equal to the outside air pressure, and the sticking member does not expand or contract due to fluctuations in the outside air temperature, and the sticking surface on the sticking member side bends. There is no.

According to a third aspect of the present invention, the pad cover is provided radially inward of the steering wheel, and has a plurality of main body side ventilation holes penetrating from the front side to the back side, and the front side has The pad cover body having a sticking portion formed with a guide groove communicating with the main body side ventilation hole, and at least one of the sticking portion of the pad cover and a surface facing the sticking portion. A decorative member attached to the attachment site with an adhesive.

[0010] According to the pad cover having the above structure, an adhesive means such as an adhesive is provided on at least one of the attaching portion of the pad cover main body and the attaching surface of the decorative member, and the pad cover main body is attached to the attaching portion. When the decorating member is arranged, and in this state, the decorating member is pressed toward the sticking portion side (ie, the pad cover body side) from the side opposite to the sticking portion via the decorating member,
Air between the decorating member and the pad cover main body escapes from the pad cover main body side ventilation hole to the back side of the pad cover main body (that is, the side opposite to the sticking portion). Further, the air at a position away from the pad cover body side ventilation hole moves between the pad cover body and the decorating member by a compressive force when the decorating member is pressed, and reaches the guide groove. From the guide groove, it passes through the pad cover body side ventilation hole to the back side of the pad cover body. For this reason, the contact area between the pad cover main body and the decorating member via the bonding means increases, and the decorating member can be firmly adhered to the adhering portion of the pad cover main body. Further, when the decorating member is pressed by the pressing means such as the punch of the press device, the pressing means is not moved in a direction other than the pressing direction, so that the decorating member is not damaged.

[0011]

FIG. 3 is a plan view of a steering wheel 12 to which a pad cover 10 according to a first embodiment of the present invention is applied, and FIG. The figure is shown.

As shown in FIG. 1, the steering wheel 12 has a ring-shaped rim 16. Rim 1
A hub 18 is provided at a position separated from the center of the rim 16 by a predetermined distance toward the occupant side in the axial direction of the rim 16. The hub 18 and the rim 16 are connected and integrated by a plurality of thin plate-shaped spokes 20 extending radially from the outer peripheral surface of the hub 18. The hub 18 is provided with a through hole 22.
Can be attached to a steering shaft (not shown) of a steering device provided in the vehicle via the.

Further, the occupant side of the hub 18 (arrow A in FIG. 4)
(Direction), an airbag device 24 is disposed. The airbag device 24 includes a base plate 26 formed in a substantially box shape from a soft metal such as a steel plate material or a synthetic resin, and is screwed to a core metal 28 provided on a pad cover body 42 described later. Fixed.

A circular hole 34 is formed in the base plate 26, and a column-shaped inflator 36 is fixed to the base plate 26 so as to pass through the circular hole 34. Inside the inflator 36, a starting device, a primer, a detonator,
Each member (all not shown) such as a gas generating material and a filter is housed. When the vehicle suddenly decelerates, the inflator 36 activates a starting device by a signal from an internal acceleration sensor or an acceleration sensor attached to the vehicle body, ignites a detonator, and discharges a gas generating material through a detonating material. Burn to generate large amounts of gas. Further, the gas is cooled by a filter and debris and the like are removed, and a plurality of gas holes 3 formed in the outer peripheral portion of the inflator 36 are formed.
8 to the outside.

On the occupant side of the inflator 36, a bag 40 is provided.
Are arranged so as to cover the inflator 36. The bag body 40 has an opening fixed to the base plate 26 and is normally folded as shown in FIG. 4, but when the gas is released from the gas hole 38 of the inflator 36, the pressure of the gas causes It expands and expands to the occupant side (the direction of arrow A in FIG. 4).

On the occupant side of the bag body 40, a base plate 26 is provided with a resin pad cover body 42 as a base material constituting the pad cover 10. The pad cover main body 42 has a substantially box shape opened toward the occupant side, and the core metal 28 is embedded in the side wall portion 44. The core metal 28 has an end on the side opposite to the occupant protruding from the side wall portion 44 and supports the above-described base plate 26. A flange 48 extends from the periphery of the upper bottom portion 46 of the pad cover main body 42 along the base plate 26, and the distal end thereof is detachably engaged with the base plate 26. As a result, the pad cover 10 and the airbag device 24 are integrally attached to the steering wheel 12. As shown in FIG. 4, a weak portion 50 which is partially thin is formed on the upper bottom portion 46 of the pad cover main body 42. Since the fragile part 50 is thin, the mechanical strength is lower than other parts,
When the airbag device 24 is activated and the bag body 40 is inflated, the bag body 40 is broken by a pressing force from the bag body 40. by this,
The upper bottom part 46 is partially deployed, and the bag body 40 is deployed forward of the occupant.

Also, as shown in FIG.
A concave fitting portion 52 is formed at a substantially central portion of the surface (i.e., the surface on the occupant side) toward the occupant side, and a decorative plate 54 as a sticking member or a decorative member is fitted therein. I have.

FIG. 2 is a partially enlarged perspective view of the vicinity of the fitting portion 52 of the pad cover 12, and FIG. 1 is a sectional view taken along line 1-1 in FIG. The figure is shown.

As shown in FIGS. 1 and 2, a ventilation hole 58 as a base material side ventilation hole or a main body side ventilation hole is formed substantially at the center of the bottom 56 of the fitting portion 52 as an attachment portion. Have been. The ventilation hole 58 penetrates through the back surface side of the upper bottom portion 46 and communicates the fitting portion 52 with the back surface side of the upper bottom portion 46. Further, a plurality of (eight in the present embodiment) guide grooves 60 having a concave shape are formed in the bottom portion 56 toward the occupant. As shown in FIG. 2, these guide grooves 60 are formed radially at a predetermined angle around the vent hole 58, and one end thereof communicates with the vent hole 58.

As shown in FIGS. 1 and 2, a vent hole 62 is formed at the other end of each guide groove 60 as a base material side vent hole or a main body side vent hole. These vents 62 are also similar to the vents 58 described above,
The bottom surface of the upper part 46 communicates with the fitting portion 52.

On the other hand, the decorating plate 54 has a sheet-like base portion 64 formed of a synthetic resin material such as urethane. Above this base portion 64, it is formed of a synthetic resin material such as urethane similarly to the base portion 64, and
A sheet-shaped decorating section 66 having characters and pictures on its surface
Is arranged. The peripheral portion of the decorative portion 66 is fixed to the peripheral portion of the base portion 64 by a fixing means such as an adhesive or thermocompression bonding. A shape holding portion 68 made of a flexible foamed resin material is provided between the decorating portion 66 and the base portion 64. The shape is maintained in a predetermined plate shape.

On the other hand, on the opposite side of the base portion 64 from the decorative portion 66, a sheet-like adhesive portion 70 having an adhesive applied to both surfaces is provided. A plate 54 is attached to the bottom 56 of the fitting portion 52.

Next, the operation and effect of this embodiment will be described.

When attaching the decorating plate 54 to the steering wheel 12, first, the back surface of the covering portion 66 of the decorating plate 54 (ie, the side opposite to the bottom 56 of the fitting portion 52 in the attached state). An adhesive is applied to at least one of the surface) and the bottom portion 56 of the fitting portion 52. In this state,
The decorating plate 54 is fitted into the fitting portion 52, and the decorating plate 54 extends from the surface side of the decorating plate 54 along the surface direction of the bottom portion 56 of the fitting portion 52 (that is, along the arrow B direction in FIG. 1). Press 54. At this time, the air remaining between the back surface of the decorating plate 54 and the bottom 56 of the fitting portion 52 moves as the decorating plate 54 is pressed against the bottom 56. When the air that has moved between the back surface of the decorating plate 54 and the bottom portion 56 reaches any of the plurality of guide grooves 60, the air moves from the ventilation hole 58 or the ventilation hole 62 to the back surface side of the flange portion 48 via the guidance groove 60. Get out. Thereby, the decoration plate 5
The air that has moved between the back surface of the base 4 and the bottom 56 does not remain, and is adhered to a portion of the bottom 56 other than the portion where the ventilation holes 58 and 62 and the guide groove 60 are formed via an adhesive. Is done. In addition, as described above, since a fixed sticking area can be secured, an error in sticking strength can be extremely small and sticking can be performed firmly. In particular, since the steering wheel 12 is equipped with the airbag device 24, when the bag body 40 is inflated, the pad cover body 42 may
Although the pad cover main body 42 is broken at the portion 0 and the pad cover main body 42 is partially deployed to the occupant side, the error in the bonding strength between the decorative plate 54 and the bottom 56 can be reduced and the bonding can be performed firmly as described above. When the pad cover body 42 is unfolded, the fitting portion 52 is
The decorative plate 54 does not come off from the.

Also, when attaching the decorative plate 54, the decorative plate 54 may be pressed from the surface side of the decorative plate 54 along the surface direction of the bottom 56 of the fitting portion 52.
No scratches or the like are formed on the surface.

In this embodiment, the ventilation holes 58 are formed radially. However, it is not always necessary to form them radially. For example, the ventilation holes 58 may be formed in parallel.
It may be formed in a lattice shape. Furthermore, the ventilation holes 5
It is not necessary to form a plurality of holes 8, and only one vent hole 58 may be used.

In this embodiment, both ends of each guide groove 60 communicate with the ventilation holes 58 or 62.
Both ends do not necessarily have to communicate with the back side of the pad cover body 42. That is, for example, the vent hole 62
The guide groove 60 may be communicated with the back side of the pad cover body 42 only by the ventilation hole 58 without forming the ventilation hole 58, or the guide groove may be formed without forming the ventilation hole 62 at the other end of the guidance groove 60. 60
May be formed in the middle part in the longitudinal direction.

Further, from the viewpoint of the present invention described in claim 1, this embodiment applies the invention to the steering wheel 12, but the present invention is applied to the steering wheel 12. However, the present invention is not limited to the application to the steering wheel 12. In other words, when a sticking member such as the decorating plate 54 is stuck to a base material such as the pad cover main body 42 with an adhesive, for example, the decorating member such as the decorating plate 54 is attached to the assistant of the vehicle. The present invention can be widely applied to other parts of a vehicle and articles other than the vehicle, such as a case of sticking to the surface of a glove box in front of a seat.

In this embodiment, a member having a configuration in which an adhesive is applied to both sides of the sheet member is applied to the adhesive portion 70, but the adhesive is directly applied to the back surface of the base portion 64 without using the sheet member. The adhesive layer formed at this time by applying the adhesive may be used as the adhesive portion 70.

Next, a second embodiment of the present invention will be described.

FIG. 5 is a sectional view of a pad cover 90 according to a second embodiment of the present invention. As shown in this figure, the decoration plate 92 of the pad cover 90
The bonding portion 70 is formed with a ventilation hole 94 as a bonding member side ventilation hole or a decoration member side ventilation hole. On the other hand, the base portion 64 is provided with a ventilation hole 96 as a sticking member side ventilation hole or a decoration member side ventilation hole communicating with the ventilation hole 94. In the decorating plate 92, the space between the decorating portion 66 and the base portion 64 in which the shape holding portion 68 is housed communicates with the outside of the decorating plate 92 through the ventilation holes 94 and 96.

The opening position of the ventilation hole 94 on the bottom 56 side is substantially at the center of the decoration plate 92. When the decoration plate 92 is adhered to the bottom 56, the ventilation hole 94 is closed.
And the air hole 58 face each other and communicate directly.

That is, in the present pad cover 90, the inside of the decorative plate 92 and the back side of the pad cover main body 42 are always in communication. Therefore, the air pressure and the temperature inside and outside the decoration plate 92 are always constant, and the clothing section 66 does not expand or contract due to fluctuations in the outside air temperature or the outside air pressure. For this reason, the adhered state between the back surface of the decorating plate 92 and the bottom portion 56 can be kept constant irrespective of changes in the outside air temperature and the outside air pressure.

In this embodiment, the ventilation hole 94 is communicated with the ventilation hole 58 through the ventilation hole 96.
It may be communicated with the ventilation hole 58 or the ventilation hole 62 through 0.

[0035]

As described above, the air between the sticking member of the present invention and the base material is evacuated to increase the bonding area between the sticking member and the base material. Can be firmly attached. Moreover, it is not necessary to move a pressing means such as a punch of a press machine in a direction different from the pressing direction while keeping the pressing member in contact with the sticking member. Improvement can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a pad cover according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the pad cover according to the first embodiment of the present invention.

FIG. 3 is a plan view of a steering wheel to which the pad cover according to the first embodiment of the present invention is applied.

FIG. 4 is a sectional view of a steering wheel to which the pad cover according to the first embodiment of the present invention is applied.

FIG. 5 is a sectional view of a main part of a pad cover according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Pad cover 12 Steering wheel 42 Pad cover main body (base material) 54 Decorative plate (adhering member, decorative member) 56 Bottom part (adhering part) 58 Vent hole (base material side vent hole, main body side vent hole) 60 Guide groove 62 Vent hole (base material side vent hole, main body side vent hole) 90 Pad cover 92 Decorative plate (adhering member, decorative member) 94 Vent hole (adhering member side vent hole, decorative member side vent hole) ) 96 vents (sticking member side vents, decorating member side vents)

Claims (3)

[Claims] 1. A sticking structure for sticking a sticking member formed separately from a base material to a surface of the base material, wherein the sticking member is provided through an adhesive means having an adhesive force. A base material side ventilation hole that communicates the sticking portion of the base material to which the sticking portion is attached and the back surface side of the sticking portion, and is formed in the sticking portion and communicates with the ventilation hole,
And a guide groove for guiding air between the base material and the bonding member to the vent hole. 2. The sticking structure according to claim 1, wherein a sticking member side ventilation hole is formed in the sticking member for communicating the inside of the sticking member with the base material side ventilation hole. 3. A plurality of main body side ventilation holes which are provided radially inside the steering wheel and penetrate from the front side to the back side are formed, and communicate with the main body side ventilation holes on the front side. A pad cover main body having a sticking part in which a guide groove is formed; and the sticking part by an adhesive applied to at least one of a sticking part of the pad cover and a surface facing the sticking part. And a decorative member to be attached to the pad cover.