JP2004276797A - Air back mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily recognize whether deviation amount is a permissible deviation amount that enables an air bag 50 to normally deployed, even if deviation of a joining position is generated when a panel 20 and an air bag mounting tool 30 are joined. <P>SOLUTION: The panel 20 has doors 21a, 21b, rotating shaft portions 27a, 27b of the doors, and an opening/tearing prospective portion 27c tearing at the time of deploying of the doors. The air bag mounting tool 30 has an joining portion (a tip end of a projecting portion 40) joined to the panel 20, and an opening 46. The width L3 of the opening 46 is made to be longer than length for exposing the opening/tearing prospective portion 27c and the door 21 around the opening/tearing prospective portion 27c. Distance L1 is shorter than distance L4 between the rotating shaft portion 27a and the closest joining portion (a tip end of the projecting portion 40a) to the rotating shaft portion 27a. Distance L2 is shorter than distance L5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag mounting device.
[0002]
2. Description of the Related Art An airbag attachment is joined to the back of an instrument panel of a vehicle such as an automobile. An airbag is attached to the airbag attachment. Patent Literature 1 discloses an airbag attachment in which a groove that is torn by the inflation force of an airbag is formed.
[0003]
[Patent Document 1]
JP-A-2002-12116 (see FIG. 1 and [0017] of the publication)
[0004]
In the configuration described in Patent Document 1, when the panel and the airbag attachment are joined, even if a displacement of the joining position occurs, the amount of displacement is determined by the normal deployment of the airbag. It is difficult to easily recognize whether or not the allowable deviation amount is possible.
[0005]
Further, there is a demand that after joining the panel and the airbag attachment, it is desired to recognize whether the joining strength is equal to or larger than a predetermined value. This is because, for example, it is desired to inspect whether or not the bonding strength is such that the bonding is not separated even if a stress is generated in a direction in which the bonding between the two is to be separated when the airbag is deployed. However, conventionally, it has been difficult to easily and accurately recognize whether the bonding strength is such.
[0006]
The present invention provides a technique for easily recognizing whether a displacement amount is an allowable displacement amount at which an airbag can be normally deployed even if a displacement of a joining position occurs when a panel and an airbag attachment are joined. One purpose is to provide
Another object of the present invention is to provide a technique capable of easily and accurately recognizing whether the bonding strength between the panel and the airbag attachment is equal to or larger than a predetermined value.
[0007]
SUMMARY OF THE INVENTION According to one aspect of the present invention, an airbag mounting apparatus includes a panel and an airbag mounting device. The panel has a door, a first linear portion serving as a rotation axis of the door, and a second visible linear portion that is torn when the door is unfolded. The first part and the second part are arranged side by side in the door width direction. The airbag attachment has a joint joined to the panel and an opening exposing the second portion. The opening has a first opening end on the side facing the one direction in the door width direction from the second portion, and a second opening end on the side facing the other direction in the door width direction from the second portion. The distance between the first open end and the second open end is equal to or longer than the length at which the second portion and the surrounding door are exposed from between these ends. The distance between the first opening end and the second portion in the door width direction is shorter than the distance between the first portion and the joint closest to the first portion on the side facing the one direction from the first portion. The distance between the second opening end and the second part in the door width direction is shorter than the distance between the first part and the joint closest to the first part on the side facing the other direction from the first part.
[0008]
If the joining position of the panel and the airbag attachment is shifted and the position of the joint between the first portion of the panel and the airbag attachment overlaps, the possibility that the airbag will not deploy properly increases.
[0009]
In this aspect, the airbag attachment has the opening described above. The distance between the first opening end of the opening and the second part in the door width direction is shorter than the distance between the first part and the joint closest to the first part on the side facing the one direction from the first part. Further, the distance between the second opening end and the second portion in the door width direction is shorter than the distance between the first portion and the joint closest to the first portion on the side facing the other direction from the first portion. As a result, when the visible second portion is exposed from the opening, it can be seen that even if the joining position is shifted, the first portion and the joining portion are not shifted to such an extent that they overlap. In other words, it can be seen that the displacement of the joining position is an allowable displacement that allows the airbag to normally deploy.
Further, the distance between the first open end and the second open end is equal to or longer than the length at which the second portion and the surrounding door are exposed from between these ends. Therefore, it is easy to see whether the second portion is exposed from the opening.
[0010]
If an opening much wider than this mode is formed in the airbag fixture, the second portion is exposed from the opening even if the joining position is shifted so that the first portion and the joining portion overlap. It may be. As a result, it is not known that the position of the first portion and the position of the joining portion do not overlap merely by the fact that the second portion is exposed from the opening. In order to know this, it is necessary to measure the specific position of the second part by some method.
[0011]
On the other hand, in the present aspect, when the second portion is exposed from the opening, it can be clearly understood that the position of the first portion does not overlap with the position of the joint. Therefore, it is not necessary to measure the specific position of the second part in order to know whether or not the position of the first part and the position of the joint part overlap.
[0012]
As described above, according to this aspect, when the panel and the airbag attachment are joined, even if a displacement of the joining position occurs, it is determined whether or not the displacement is an allowable displacement that allows the airbag to normally deploy. Easy to recognize.
[0013]
The distance between the first open end and the second open end is preferably at least twice the width of the second part, more preferably at least five times. Alternatively, the distance between the first opening end and the second portion in the door width direction is preferably at least 1/5, more preferably at least 1/3 of the first shortest distance. Similarly, the distance between the second opening end and the second portion in the door width direction is preferably at least 1/5, more preferably at least 1/3 of the second shortest distance.
According to this aspect, it is easier to visually recognize the second portion. In addition, although the displacement of the joining position occurs, the state where the position of the first portion and the joining portion do not overlap (allowable displacement amount) can be more widely recognized.
[0014]
It is preferable that the airbag attachment has a door, and a region of the door adjacent to the opening is inclined so as to descend toward the opening.
According to this aspect, it is possible to more easily recognize whether the second portion of the panel is exposed from the opening.
[0015]
The present invention is also embodied in an airbag attachment. In this airbag attachment, two sets of a door, a rotating shaft portion serving as a rotating shaft of the door, and at least one joining portion are formed substantially symmetrically with a predetermined axis as a symmetric axis. An opening having a width that is 1/5 or more of the shortest distance between the rotating shaft portion and the joining portion in the door width direction and that is smaller than twice the shortest distance is formed between the two sets of doors. Have been.
[0016]
The width of the opening is preferably at least 1/3 times the shortest distance, and more preferably at least 2/3 times the shortest distance.
[0017]
The present invention is also embodied in a method for inspecting the bonding strength between a panel and an airbag attachment. The method includes a step of pulling the airbag attachment in a direction in which a force for peeling the joint is applied to a joint between the panel and the airbag attachment, and changing a shape of a predetermined portion of the airbag attachment to a predetermined shape.
[0018]
As an aspect of "pulling the airbag attachment", for example, a tool is inserted into an opening formed in the airbag attachment, the tool is engaged with the airbag attachment, and the airbag is pulled by pulling the tool. Is mentioned. The mode of “changing the shape of the predetermined portion of the airbag attachment to the predetermined shape” includes breaking the predetermined portion of the airbag attachment and bending the predetermined portion of the airbag attachment.
[0019]
In this embodiment, the shape of the predetermined portion of the airbag attachment is changed to the predetermined shape by pulling the airbag attachment. If it is recognized in advance that this change in shape is a change obtained by pulling with a predetermined tensile force, it is understood that the user has been pulled with a predetermined tensile force by recognizing this change in shape. Since this change in shape can be visually recognized, it is easy to recognize. There is no need to measure the magnitude of the pulling force using a measuring device.
Further, since the airbag attachment is pulled in a direction in which the joint between the two is to be separated, if this shape change occurs and the joint between the two is not separated, the bonding strength between the two is a predetermined value. Can be estimated with high accuracy.
According to this aspect, it is possible to easily and accurately recognize whether the bonding strength between the panel and the airbag attachment is equal to or greater than a predetermined value.
[0020]
The method further includes the step of joining the panel and the airbag attachment using a joining device. In the step of changing the shape to the predetermined shape, the airbag attachment is pulled using the joining device used in the joining process. Is preferred.
According to this aspect, the joining device can be used not only for joining, but also for inspection of joining strength.
[0021]
It is preferable that the joining device is formed with an engagement portion that can be engaged with the airbag attachment.
[0022]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an instrument panel (hereinafter referred to as "panel") 20 as viewed from the front side. FIG. 2 is a sectional view taken along line II-II in FIG. Reference numeral 22 denotes the surface of the panel 20. Reference numeral 24 denotes the back surface of the panel 20. As shown in FIG. 2, a bracket (an example of an airbag attachment) 30 for attaching an airbag 50 is joined to the back surface 24 of the panel 20. FIG. 3 shows a view of the bracket 30 viewed from the back side. The panel 20 and the bracket 30 are components of the airbag attaching device of the present embodiment.
[0023]
As shown in FIGS. 1 and 2, the panel 20 is integrally formed with panel-side doors (airbag doors) 21a and 21b. The panel-side doors 21a and 21b are surrounded by a linear thin portion (an example of a weak portion) 27. The thin portion 27 is formed by making a cut in the panel 20 and forming a groove 28 (see 28a to 28c in FIG. 2). As described above, the thin portion 27 and the groove 28 partition the panel-side doors 21a and 21b along the same locus. The thin portion 27 or the groove 28 can be said to be a tear line. The thin portion 27 and the groove 28 may be intermittently formed in a dotted line (an example of a line).
[0024]
The thin portion 27 has rotating shaft portions (an example of a first portion) 27a and 27b, a portion to be cleaved (an example of a second portion) 27c, and a portion to be cleaved 27d (see FIG. 1). Corresponding to these portions, the groove portion 28 has portions denoted by reference numerals 28a to 28d. The rotating shaft portions 27a and 27b serve as rotating shafts of the doors 21a and 21b when the panel-side doors 21a and 21b are deployed. The tearable portions 27c and 27d are torn when the panel-side doors 21a and 21b are deployed. The rotating shaft portions 27a and 27b and the to-be-cleaved portion 27c are arranged side by side in the width direction of the panel-side doors 21a and 21b (vertical direction in FIG. 1 and horizontal direction in FIG. 2). In the present embodiment, the rotating shaft portions 27a and 27b and the portion to be cleaved 27c are formed substantially in parallel. As shown in FIG. 1, the panel 20 has an opening 26 for mounting instruments. The thin portion 27 (groove 28) has a shape different from other portions of the panel 20, and thus can be visually recognized. The thin portion 27 may be made weaker, for example, by using a material having a lower strength than other portions of the panel 20 instead of the thin structure.
[0025]
As shown in FIGS. 2 and 3, the bracket 30 has an outer edge portion 36, bracket side doors 38a and 38b, a mounting portion 34 for the airbag 50, and connecting portions 35a and 35b (see FIG. 2). The connecting portions 35a and 35b shown in FIG. 2 connect the bracket side doors 38a and 38b and the mounting portions 34a and 34b, respectively. A group of protrusions (welding ribs) 40 is formed on the surface of the outer edges 36a, 36b and the bracket side doors 38a, 38b facing the panel 20. The tips of the projections 40 are joined to the back surface 24 of the panel 20 by vibration welding. Thus, the tip of the projection 40 is a joint (joining site). Openings 32a, 32b are formed in the mounting portions 34a, 34b. The hooks 52 of the airbag 50 are hooked on the openings 32a and 32b. Thus, the airbag 50 is attached to the bracket 30. Reference numerals 37a and 37b denote rotating shaft portions of the bracket side doors 38a and 38b, respectively.
[0026]
As shown in FIG. 3, an opening 42 is formed near the end of the outer edge 36 of the bracket 30 (the upper right region in FIG. 3). The opening 42 is used when performing a bonding strength inspection method described later, and is an opening for tool engagement.
[0027]
As shown in FIGS. 1 and 2, both the two sets of panel-side doors 21 and the two sets of rotary shafts 28 have one set and the other set with the first axis X1 (see FIG. 1) as the axis of symmetry. It is formed symmetrically. The first axis X1 is located at a position overlapping with the cleavage scheduled portion 27c.
As shown in FIGS. 2 and 3, the bracket 30 is formed symmetrically with respect to the second axis X2 (see FIG. 2). When viewed in a plan view, as shown in FIG. 3, the first axis X1 and the second axis X2 coincide.
[0028]
As shown in FIGS. 2 and 3, an opening 46 for visual recognition of the to-be-cleaved portion 27c is formed between the bracket side doors 38a and 38b. FIG. 4 is an enlarged perspective view of a region A near the opening 46 in FIG. As shown in FIG. 4, the opening 46 exposes the portion to be cleaved 27 c (groove 28 c). As shown in FIGS. 2 and 4, the opening 46 has a first opening end 46a and a second opening end 46b. The first opening end 46a is located on one side (leftward) in the door width direction (the left-right direction in FIGS. 2 and 4) from the scheduled tearing portion 27c. The second opening end 46b is located on the side facing the other direction (rightward) in the door width direction from the cleavage target portion 27c.
[0029]
As shown in FIG. 4, the portion to be cleaved 27c and the panel side doors 21a and 21b around it are exposed from between the first opening end 46a and the second opening end 46b. Therefore, it is easy for the inspector 54 to visually recognize whether the planned cleavage portion 27c is exposed from the opening 46.
In the bracket-side doors 38a and 38b, thin portions 39a and 39b which are thinner than other portions are formed in a region adjacent to the opening 46. The thin portions 39a and 39b are slightly inclined so as to descend toward the opening 46 side. The thin portions 39a and 39b can be said to be chamfered portions chamfered in the thickness direction. Thereby, the visual recognition by the inspector 54 becomes easier.
[0030]
As shown in FIG. 2, the distance L3 between the first opening end 46a and the second opening end 46b (the width of the opening 46) is the sum of the distances L1 and L2. The distance L1 is a distance between the first opening end 46a and the to-be-cleaved portion 27c in the door width direction (the left-right direction in FIG. 2). The distance L2 is a distance between the second opening end 46b and the to-be-cleaved portion 27c in the door width direction. It is preferable that the distance L3 is at least twice the width of the scheduled cleavage part 27c. The distance L1 is shorter than the distance L4. The distance L4 is the distance between the joint (the tip of the protrusion 40a) closest to the rotating shaft 28a on the side facing one direction (leftward in the drawing) from the rotating shaft 28a in the door width direction and the rotating shaft 28a. is there. The distance L2 is shorter than the distance L5. The distance L5 is the distance between the joint (the tip of the protrusion 40b) closest to the rotating shaft 28b on the side facing the other direction (rightward in the drawing) from the rotating shaft 28b in the door width direction and the rotating shaft 28b. is there. Since the present embodiment has a symmetric structure, the distances L1 and L2 are equal, and the distances L4 and L5 are equal.
[0031]
As shown in FIG. 2, the positions of the rotating shaft portions 27a and 27b on the panel 20 side and the rotating shaft portions 37a and 37b on the bracket 30 side are substantially equal in the door width direction (left and right direction in FIG. 2). Therefore, the distance in the door width direction between the rotation shaft 37a on the bracket 30 side and the joint (the end of the protrusion 40a) is substantially equal to the distance L4 described above. The distance in the door width direction between the rotation shaft 37b on the bracket 30 side and the joint (the end of the protrusion 40b) is substantially equal to the above-described distance L5 (= L4). The width L3 is at least １ ／ of the distance L4 (= L5) and smaller than twice the distance L4.
[0032]
In this embodiment, the distances L4 and L5 are 9 mm. The width of the cleaved portion 27c is 1 mm. The distance L3 is 6 mm. The distances L1 and L2 are 3 mm. The distance L3 (6 mm) is six times the width (1 mm) of the cleavage target portion 27c. The distances L1 and L2 (both 3 mm) are ３ times the distances L4 and L5 (both 9 mm).
Further, the distance L3 (6 mm) is 2/3 times the distance L4 or L5 (9 mm).
[0033]
The operation of the airbag attaching device according to the present embodiment will be described. When the airbag 50 shown in FIG. 2 is inflated, the to-be-cleaved portions 27c and 27d (see FIG. 1) are torn, and the panel-side doors 21a and 21b are deployed. The panel-side doors 21a and 21b are deployed around the rotation shaft portions 27a and 27b as indicated by arrows K1 and K2 in FIG. 2, respectively. Therefore, in conjunction with the expansion of the panel-side doors 21a and 21b, the bracket-side doors 38a and 38b joined thereto are also expanded. The bracket-side doors 38a and 38b are deployed around the rotation shaft portions 37a and 37b, respectively.
[0034]
In this embodiment, as shown in FIG. 3, the panel 20 and the bracket 30 are joined so that the axis of symmetry X1 of the panel 20 and the axis of symmetry X2 of the bracket 30 exactly match when viewed from a direction perpendicular to the surface of the panel 20. Have been. However, actually, due to a manufacturing error, the bonding may not be performed so that the symmetry axes X1 and X2 exactly coincide with each other, and the bonding position may be shifted. If the joining position is shifted and the position of the joint (the tip of the projection 40) of the bracket 30 and the rotating shaft 27a or 27b of the panel 20 shown in FIG. 2 overlaps, the airbag 50 may not be deployed normally. Get higher.
[0035]
In this embodiment, the bracket 30 has the opening 46 described above. The distances L1, L2 (both 3 mm) constituting the width L3 of the opening 46 are shorter than the distances L4, L5 (both 9 mm). As a result, in the case where the visible cleavable portion 27c is exposed from the opening 46, the position of the rotating shaft portions 27a, 27b and the joint portion (the tip of the projection 40) even if the joining position is shifted. It can be seen that they did not deviate to the extent that. In other words, it can be seen that the displacement amount of the joining position is an allowable displacement amount that allows the airbag 50 to normally deploy.
The width L3 of the opening 46 is equal to or greater than the length of the opening 46 that exposes the portion 27c to be cleaved and the surrounding panel-side doors 21a and 21b. Therefore, it is easy to visually recognize whether or not the cleavage target portion 27c is exposed from the opening 46.
[0036]
In this embodiment, when the to-be-cleaved portion 27c is exposed from the opening 46, it can be clearly understood that the positions of the rotating shaft portions 27a and 27b and the joining portion do not overlap. Therefore, there is no need to measure the specific position of the scheduled cleavage portion 27c in order to know whether the positions of the rotating shaft portions 27a and 27b and the joining portion overlap.
[0037]
As described above, according to the present embodiment, when the panel 20 and the bracket 30 are joined to each other, even if a displacement of the joining position occurs, whether the displacement is an allowable displacement that allows the airbag 50 to normally deploy. Can be easily recognized.
[0038]
FIG. 5 shows another configuration example of the bracket 30 in the vicinity of the scheduled cleavage portion 27c. In the above-described configuration, as shown in FIGS. 3 and 4, the openings 46 having the width L2 are formed in all regions along the cleavage target portion 27c. On the other hand, as shown in FIG. 5, the opening 47 having the width L2 may be formed only in a part of the region along the cleavage target portion 27c. In the configuration of FIG. 5, the region 56 a of the bracket-side door 38 a adjacent to the opening 47 is inclined so as to descend toward the opening 47. Although not shown, the same applies to the bracket side door 38b. This area 56a can be said to be a chamfer. Thereby, it is easier to visually recognize whether or not the cleavage target portion 27c is exposed from the opening 47.
[0039]
FIG. 6 is a sectional view taken along line VI-VI in FIG. FIG. 7 is a perspective view showing the vicinity of the tool engagement opening 42 shown in FIGS. 3 and 6. As shown in FIGS. 6 and 7, a portion 56 of the outer edge 36 of the bracket 30 outside the opening 42 is thinner than other portions. Thereby, the thin portion 56 is weaker than the other portion (thick portion) of the outer edge portion 36. The thin portion 56 is set to a thickness such that the thin portion 56 is broken when pulled by a tool 58 with a predetermined magnitude of force.
[0040]
The first bonding strength inspection method will be described. First, as shown in FIG. 6, an inspection tool 58 is inserted into the opening 42 of the outer edge 36 of the bracket 30, and the tool 58 is engaged with the outer edge 36 (more specifically, the thin portion 56) of the bracket 30. . Next, with the panel 20 fixed, the tool 58 is pulled upward in the figure until the thin portion 56 of the bracket 30 is broken as shown in FIG. The tool 58 may be pulled by the inspector himself or by using a pulling mechanism (such as an actuator).
[0041]
When the thin portion 56 is broken, it means that the bracket 30 has been pulled by a predetermined amount of pulling force. This is because, as described above, the thin portion 56 is set to have such a thickness as to be broken when pulled by the tool 58 with a predetermined amount of force. It is very easy to see that the thin portion 56 has been broken.
In a state in which the tool 58 is engaged with the outer edge 36 of the bracket 30, while the tool 58 is being pulled upward, the joining portion 41 (the tip of the protruding portion 40) tries to peel the joining. The force to do is added. Therefore, when the joining portion 41 does not peel off despite the thin portion 56 is broken, it can be estimated with high accuracy that the joining strength of the joining portion 41 is equal to or larger than a predetermined value.
Therefore, according to this method, it is possible to easily and accurately recognize whether the bonding strength between the panel 20 and the bracket 30 is equal to or larger than a predetermined value.
[0042]
FIG. 9 shows a cross-sectional view of a configuration for joining panel 20 and bracket 30 by vibration welding. The panel 20 is mounted on the base 70. A suction hole 72 is formed in the base 70. The panel 20 is fixed to the base 70 by sucking the gas in the hole 72. On the panel 20, a bracket 30 is mounted. The panel 20 and the bracket 30 shown in FIG. 9 have a positional relationship obtained by inverting the one shown in FIG. The bracket 30 has a plate portion 66 extending in a direction perpendicular to the outer edge portion 36. FIG. 10 shows an enlarged view of the vicinity of the plate portion 66. As shown in FIG. 10, the plate portion 66 has an opening 64 formed therein. Above the bracket 30, a vibration welding jig 60 is located. A projection 62 is formed on a side surface of the jig 60.
[0043]
The second bonding strength inspection method (including the vibration welding method) will be described. Before the vibration welding of the panel 20 and the bracket 30 is performed, the jig 60 is located above the position shown in FIG. When performing vibration welding, the jig 60 located above is lowered until the tip thereof reaches the bracket 30, as shown in FIG. Next, the bracket 30 is vibrated by the jig 60. For example, the bracket 30 is vibrated in a direction parallel to the surface of the panel 20 (the left-right direction in the drawing and the direction perpendicular to the paper surface). As a result, the tip of the projection 40 of the bracket 30 and the portion of the panel 20 that is in contact with the tip are melted by frictional heat due to vibration. As a result, the tip of the projection 40 of the bracket 30 and the portion of the panel 20 that is in contact with the tip are welded. Thereby, the bracket 30 and the panel 20 are joined.
[0044]
Next, the jig 60 is moved in the horizontal direction so as to approach the plate 66, and the projection 62 of the jig 60 is inserted into the opening 64 of the plate 66 (see FIGS. 9 and 10). . Next, as shown in FIG. 11, the jig 60 is raised. Thereby, the protrusion 22 of the jig 60 is engaged with the bracket 30, and the bracket 30 is pulled by the jig 60. When the jig 60 is further raised, the distal end portion 66a of the plate portion 66 of the bracket 30 is broken. FIG. 12 and FIG. 13 show a state in which the distal end portion 66a of the plate portion 66 is broken and the space 68 is formed. FIG. 13 is a view of the state of FIG. 12 as viewed from the side facing the protrusion 62.
[0045]
The distal end portion 66a of the plate portion 66 of the bracket 30 breaks when a predetermined amount of force is applied by the projection 62 of the jig 60, similarly to the thin portion 56 shown in FIG. Is set to Therefore, similarly to the first bonding strength inspection method, when the bonding portion 41 does not peel off despite the breakage of the distal end portion 66a, the bonding strength of the bonding portion 41 is equal to or larger than a predetermined value. Can be estimated with high accuracy.
Further, according to this method, the vibration welding jig 60 can be used not only for joining by vibration welding but also for inspection of joining strength.
[0046]
FIG. 14 is a diagram illustrating another configuration example of the bracket 30 as viewed from the back side. FIG. 15 is a sectional view taken along line XV-XV in FIG. In this configuration, two openings 74 are formed near the center of the door 38a of the bracket 30. When performing the joint strength inspection, the tool 58 is inserted into the two openings 74 as shown in FIG. 15, and the tool 58 is engaged with the door 38a. Then, similarly to the first bonding strength inspection method, the tool 58 is pulled upward in the drawing to break the portion 76 between the two openings 74.
[0047]
As mentioned above, although the specific example of this invention was demonstrated in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and alterations of the specific examples illustrated above.
(1) In the above-described embodiment, vibration welding is described as an example of the manner of joining the panel 20 and the bracket 30. However, for example, an aspect of joining using an adhesive or an aspect of joining using a fastener such as a screw. It may be.
(2) In the above embodiment, the structure in which the two doors (21a and 21b for the panel side door and 38a and 38b for the bracket side door) are formed symmetrically has been described, but the two doors are asymmetric. May be formed.
(3) In the above-described embodiment, the mode in which two doors are provided and the doors are deployed on both sides has been described. However, both the panel side door and the bracket side are one, and the door is deployed on one side. Is also good.
[0048]
Further, the technical elements described in the present specification or the drawings exert technical utility singly or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technology illustrated in the present specification or the drawings can simultaneously achieve a plurality of objects, and has technical utility by achieving one of the objects.
[Brief description of the drawings]
FIG. 1 is a view of an instrument panel of an airbag attaching apparatus according to an embodiment of the present invention as viewed from the front side.
FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a view of the airbag mounting bracket of the airbag mounting apparatus according to the embodiment of the present invention, as viewed from the back side.
FIG. 4 is an enlarged perspective view of a region near an opening for visual recognition of a portion to be cleaved.
FIG. 5 shows another example of the configuration of the bracket near the portion to be cleaved.
FIG. 6 is a sectional view taken along line VI-VI in FIG. 3;
FIG. 7 shows a perspective view of a region near an opening for tool engagement.
FIG. 8 is a perspective view after a thin portion near an opening for tool engagement has been removed.
FIG. 9 is a sectional view of a structure for joining a panel and a bracket by vibration welding.
FIG. 10 is an explanatory view of a second bonding strength inspection method (1).
FIG. 11 is an explanatory view of a second bonding strength inspection method (2).
FIG. 12 is an explanatory view of a second bonding strength inspection method (3).
FIG. 13 shows a view of the state of FIG. 12 as viewed from the side facing the protrusion.
FIG. 14 is a diagram showing another configuration example of the bracket as viewed from the back side.
15 is a sectional view taken along line XV-XV in FIG.
[Explanation of symbols]
20: Instrument panel (an example of a panel)
30: Bracket for attaching airbag (example of airbag attachment)
50: Airbag

Claims (4)

It has a panel and an airbag attachment,
The panel has a door, a first linear portion serving as a rotation axis of the door, and a second visible linear portion that tears when the door is unfolded, and the first portion and the second portion have a door width. Are arranged side by side in the direction,
The airbag attachment has a joint portion joined to the panel and an opening exposing a second portion, and the opening is a first opening end on a side facing one side in the door width direction from the second portion. And a second opening end on the side facing the other direction in the door width direction from the second portion,
The distance between the first open end and the second open end is equal to or greater than the length at which the second portion and the surrounding door are exposed from between these ends;
The distance between the first opening end and the second part in the door width direction is shorter than the distance between the first part and the joint closest to the first part on the side facing the one direction from the first part,
An airbag mounting device wherein a distance between the second opening end and the second portion in the door width direction is shorter than a distance between the first portion and the joint closest to the first portion on the side facing the other direction from the first portion. A door, a rotating shaft portion serving as a rotating shaft of the door, and at least one joining portion are formed substantially symmetrically with a predetermined axis as a symmetric axis, and two sets are formed.
An opening having a width that is 1/5 or more of the shortest distance between the rotating shaft portion and the joining portion in the door width direction and that is smaller than twice the shortest distance is formed between the two sets of doors. Airbag fittings. A panel and an airbag having a process of pulling an airbag attachment in a direction in which a force for peeling a joint is applied to a joint portion between a panel and an airbag attachment, and changing a shape of a predetermined portion of the airbag attachment into a predetermined shape. Inspection method for joint strength of fixture. Further comprising a step of joining the panel and the airbag fixture using a joining device,
The bonding strength inspection method according to claim 3, wherein in the step of changing the shape to the predetermined shape, the airbag attachment is pulled using a bonding device used in the bonding step.

Images