JP3879081B2 - Edge protector - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an automobile door panel in an automobile production process, particularly when an automobile door panel in a pre-painted state is transported, stored, or mounted, and these are in contact with each other or a rack or a vehicle body. The present invention relates to an edge protector used for preventing the edge of a door panel from being damaged.
[0002]
[Prior art]
Conventionally, the door panel (D) for automobiles in the automobile production process is subjected to press processing, and after finishing the surface preparation, the process proceeds to a painting process or an assembly process. The stamping process, painting process, and assembly process are often performed in different locations. In particular, in recent years, knockdowns in which automobile door panels (D) that have been pressed in Japan have been exported to overseas production bases and assembled and sold locally. Many export methods are adopted. In these cases, transportation and storage of the automotive door panel (D) is performed in alignment with the rack. At that time, the automotive door panel (D) is damaged due to contact with the rack or removed from the rack. To prevent the door panel (D) from being scratched easily, the edge protector (1a) is attached to the edge of the automobile door panel (D) to protect the edge during transportation or storage. The tool (1a) serves as a cushioning material so that the automobile door panel (D) is not damaged.
[0003]
In the painting and assembly processes for automotive door panels (D), the automobile door panel (D) is temporarily fixed to the body, and the body and the automotive door panel (D) are painted simultaneously, but the body and the automotive door panel (D ) Comes into contact and scratches, the coating unevenness occurs at that part and the finished state is deteriorated. Therefore, the edge protector (1a) is attached to the edge of the automobile door panel (D) so that the automobile door panel (D) does not directly contact the body.
[0004]
As shown in FIGS. 8 and 9, the conventional edge protector (1a) is a clip-like object having a L-shaped cross section, and is long in the cross-sectional shape of the edge protector (1a). The outer covering piece (3) and the shortened holding piece (4) are extended from the back plate (2) so as to secure a gap, and hold the edge of the automobile door panel (D). To be installed. In addition, the exterior piece (3) and the back plate (2) form a corner (6a), and the sandwiching piece (4) and the back plate (2) form a corner (6b), thereby increasing the rigidity due to the shape and the exterior. The piece (3) and the holding piece (4) are designed to exert a holding force. The material used for the edge protector (1a) is a synthetic resin material having a hardness that does not damage the mounting portion and other automobile door panels (D). Installation is carried out by an operator, and the edge protector (1a) is pushed into the edge of the automobile door panel (D) by pushing operation so that the edge is held.
[0005]
[Problems to be solved by the invention]
The edge protector (1a) of the automobile door panel (D) is used during the period from the end of the base treatment of the automobile door panel (D) to the painting process. However, the conventional automobile door panel (D) has a sag in the edge protector (1a) even when used for such a short period of time, and the clamping force is reduced, so that the edge of the automobile door panel (D) is reduced. In some cases, the protective effect was not exhibited due to falling off the part.
[0006]
The main cause of the settling is the stress that the original repulsive force is lost after a certain period of time in the edge protector (1a) when it is attached to the door panel (D) for automobiles. This may be due to mitigation. In particular, the inside of the corners (6a) (6b) is a portion where stress concentration occurs, and it is considered that the tensile stress generated by being sandwiched between the door panel (D) for automobiles becomes a locally large value. It is thought that the major cause of settling is the progress of stress relaxation inside 6a) and 6b). Further, in the edge protector (1a) that is not used repeatedly, fatigue may not be considered as a cause of settling.
[0007]
In the conventional edge protector (1a), in order to reduce the stress concentration at the corners (6a) and (6b), the corners (6a) and (6b) are also rounded inside. By taking R, there is an effect that the maximum value of stress is lowered. However, there is an adverse effect that the range in which stress concentration occurs is expanded. Therefore, the range of stress relaxation that causes settling is expanded, and it is not an effective measure to take a round as a means for preventing settling caused by the same deformation state continuing for a certain period. In addition, it has the effect of reducing fatigue by taking a round inside the corners (6a) (6b), but in the edge protection device (1a) that does not assume repeated use as described above, it is a measure to prevent settling. Must not.
[0008]
In addition, it is unavoidable that settling occurs, and it is also possible to prevent falling off of the edge protector (1a) by increasing the initial stage clamping force by making the material harder or thicker. However, when the clamping force is increased, there is a risk that the automobile door panel (D) may be damaged when the edge protector (1a) is clamped, and there is a drawback that the effect of the cushioning material is reduced due to hardening. In addition, since the edge protector (1a) is attached by being manually pushed by the operator, if the material is hardened, a pushing operation force is required, and the work efficiency is lowered. Furthermore, increasing the thickness of the material causes an increase in material cost, and it cannot be said that it is an economical measure for the edge protection device (1a) that is assumed to be discarded after a short period of use.
[0009]
Therefore, the present invention provides an edge protector for an automobile door panel (D), which can maintain the clamping force over the period of use by reducing the decrease in clamping force due to settling without increasing the clamping force in the initial stage, and lightly pushing in. An object of the present invention is to provide an edge protector that can be attached to the edge of an automobile door panel (D) by operating force, has a low material cost, is highly economical, and has a high buffering effect.
[0010]
[Means for Solving the Problems]
The present invention has been made to solve the above problems,
Extending the sandwiching piece (4) and the exterior piece (3) to the back plate (2) to prevent scratches on the edge of the automobile door panel (D) during transportation in the automobile production process, etc. In the edge protector made of thermoplastic synthetic resin used for the automotive door panel (D), which is mounted by sandwiching the edge of D),
The free end of the sandwiching piece (4) has a locking claw (8) that engages with the protrusion of the automotive door panel (D), and a guide part (9) that opens the sandwiching piece (4) by pushing operation,
While having an elastic contact portion (7) in close contact with the outer surface of the door panel for automobile (D) at the free end of the exterior piece (3),
Corner (6a) formed by back plate (2) and exterior piece (3)
And a groove portion (5) having a substantially V-shaped cross-section with a notch or a few degrees in the inside of either or both of the corner portion (6b) formed by the back plate (2) and the sandwiching piece (4). It is based on edge protection equipment characterized by
[0011]
In addition to the above configuration, the thickness of the back plate (2) may be changed so that the cross-sectional shape of the back plate (2) is convex inward.
[0012]
【The invention's effect】
According to the present invention, the corner (6a) formed by the back plate (2) and the exterior piece (3) and the inner side of either or both of the corner (6b) formed by the back plate (2) and the clamping piece (4). By forming a groove portion (5) (hereinafter simply referred to as “groove portion (5)”) having a substantially V-shaped cross section with a notch shape or an included angle of several degrees, the angle of the corner portions (6a) and (6b) can be changed to the groove portion. In (5), it is apparently small, and the degree of stress concentration inside the corners (6a) and (6b) is increased, but conversely, the stress at the part slightly off the corners (6a) and (6b) is reversed. Concentration decreases rapidly. In addition, the stress generated at the corners (6a) and (6b) is dispersed in the surrounding portions where stress concentration is almost eliminated. Therefore, compared with the case where the angles of the corners (6a) and (6b) are right angles, both the stress concentration range and the high stress concentration range are reduced. Therefore, even if a certain deformation occurs in the edge protection device (1) after being mounted on the automobile door panel (D), the range of stress relaxation in which the initial repulsive force is lost over time will be reduced. It is possible to make it difficult for the edge protector (1) to become loose.
[0013]
Further, since the plate thickness is partially reduced by forming the groove portion (5), the clamping force in the initial state is slightly reduced as compared with the conventional edge protector (1a) having no groove portion (5). . However, since stress relaxation at the corners (6a) and (6b) is reduced, a decrease in the clamping force is suppressed more than the conventional edge protector (1a). For this reason, the clamping force is maintained even after a certain period has elapsed, and the clamping force after the certain period has elapsed is higher in the edge protector (1) according to the present invention than in the conventional product, Dropout can be prevented.
[0014]
Furthermore, the decrease in the clamping force in the initial state has the effect of reducing the pushing operation force when mounting on the edge of the automobile door panel (D), so that the edge protector can be applied by the operator with a light pushing operation force. (1) can be mounted on the edge of the automobile door panel (D).
[0015]
When the edge protector (1) is repeatedly used, fatigue due to opening and closing of the exterior piece (3) and the holding piece (4) occurs in the vicinity of the groove (5) where stress concentration occurs, and the holding force is reduced. However, since the edge protector (1) according to the present invention is not premised on repeated use, fatigue due to opening and closing does not occur, and such a decrease in clamping force does not become a problem.
[0016]
Further, when the groove (5) is formed, the rigidity of the corners (6a) and (6b) is reduced and the initial clamping force is reduced, but the back plate (2) is so shaped that the cross-sectional shape of the back plate (2) is inwardly convex. By increasing the plate thickness of (2), the rigidity of the back plate (2) is increased, the clamping force is improved, and the clamping force reduced by the decrease in the rigidity of the corners (6a) (6b) is compensated. be able to. Therefore, the initial clamping force can be further increased.
[0017]
As described above, in the edge protector of the door panel (D) for automobiles, it is possible to maintain the clamping force over the period of use by reducing the decrease in clamping force due to settling without increasing the clamping force in the initial stage, and light pushing operation force Thus, it is possible to provide an edge protector that can be attached to the edge of the door panel (D) for automobiles, has a low material cost, is highly economical, and has a high cushioning effect.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the edge protector (1) according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of the edge protector (1) according to the first embodiment of the present invention, and FIG. FIG. 3 is an explanatory view of the shape of the groove (5) of the edge protector (1) according to the first embodiment, and FIG. 4 is an edge according to the second embodiment. FIG. 5 is a simplified side view of the edge protector (1) according to the third embodiment, and FIG. 6 is a view showing the use state of the edge protector (1) according to the embodiment. 7 is a simplified perspective view, FIG. 7 is an explanatory view of a state in which the edge protector (1) is engaged with the protrusion (Da) of the automobile door panel (D), and FIG. 8 is a simplified perspective view of the conventional edge protector (1a). FIGS. 9 and 9 are simplified side views of a conventional edge protector 1a.
[0019]
Example 1
As shown in FIGS. 1 and 7, the edge protector (1) used for the automobile door panel (D) according to the first embodiment of the present invention is an automobile door panel (D) such as an automobile door panel (D). The outer piece (3) and the sandwiching piece (3) and the sandwiching piece (4) are used by being attached to the edge portion so as to sandwich the edge of the automobile door panel (D). 4) is a clip-like object extending from the back plate (2) so as to be opposed to each other with a gap and having an L-shaped cross section. The length of the exterior piece (3) is 32 mm, the length of the sandwiching piece (4) is 14 mm, the height of the back plate (2) is 8 mm, and the width is 30 mm. Moreover, the plate | board thickness of an exterior piece (3) and a clamping piece (4) is 2 mm, respectively. The angle formed by the back plate (2) and the exterior piece (3) is approximately 80 degrees, and the angle formed by the back plate (2) and the sandwiching piece (4) is approximately 90 degrees.
[0020]
As shown in FIG. 2, the inside of the corner (6a) where the back plate (2) of the edge protector (1) and the exterior piece (3) abut and the back plate (2) and the clamping piece (4) Groove portions (5) along the respective corner portions (6a) and (6b) are formed on both insides of the corner portions (6b) to be abutted. The cross-sectional shape of the groove (5), as long as it looks, is a narrow angle that appears to be in close contact with each other, and is formed by a straight line that narrows from the opening toward the back. It is substantially V-shaped. In addition, when the opening of the groove (5) is in a non-contact state, the innermost part of the groove (5) is not an acute angle, and it may have a rounded shape near the innermost part of the groove (5). This is preferable because stress is not concentrated on the surface (see Fig. 2).
[0021]
In addition, the free end of the sandwiching piece (4) has a ridge (Da) (formed along the edge on the inner side of the vehicle door panel (D) when mounted on the vehicle door panel (D) ( A locking claw (8) is formed to be engaged with (see FIG. 7). The position where the locking claw (8) is formed, that is, the distance from the back plate (2), is changed according to the vehicle type in which the edge protector (1) is used. Further, a guide portion (9) is formed at the free end portion of the clamping piece (4) so that the edge protector (1) can be easily attached to the edge portion of the automobile door panel (D) by hand. The guide portion (9) is formed by rounding the free end portion of the clamping piece (4), and the edge protector (1) is brought into contact with the edge portion of the automobile door panel (D) and is clamped by pushing operation. The piece (4) is opened so that the edge of the automobile door panel (D) can be clamped. The shape of the guide portion (9) is not limited to this, and any shape may be used as long as the holding piece (4) is opened by a pushing operation.
[0022]
Further, an elastic contact portion (7) that is in close contact with the outer surface of the automotive door panel (D) is formed at the free end of the exterior piece (3). The elastic contact portion (7) prevents the automobile door panel (D) from being scratched when the free end portion is made flexible and the edge protector (1) is attached to the automobile door panel (D). The edge protector (1) is formed in contact with the curved surface on the outside of the vehicle door panel (D) so that the edge protector (1) is not easily displaced. The shape of the elastic contact portion (7) is that the free end portion of the exterior piece (3) is formed in a wedge shape to give flexibility, and slightly bent toward the sandwiching piece (4) side, so that the door panel for automobile (D) It forms so that it may adhere to. The shape of the elastic contact portion (7) is not limited to the wedge shape, but may be any shape as long as it has flexibility and conforms to the curved surface on the outside of the vehicle door panel (D).
[0023]
(Example 2)
As shown in FIG. 4, in the edge protector (1) used for the automobile door panel (D) according to the second embodiment of the present invention, the groove portion (5) is constituted by a curved surface portion (5a). That is, the cross-sectional shape of the substantially V-shaped groove portion (5) is a cross-sectional shape configured by a curve from the opening to the back, and the other components are the same as in the first embodiment. Description is omitted. The cross-sectional shape of the groove (5) may not be symmetric with respect to the center line, and may be asymmetric with respect to the center line.
[0024]
The direction of forming the groove portion (5) of the edge protector (1) according to the first embodiment and the second embodiment is such that the direction of the center line in the cross-sectional shape of the groove portion (5) is the corner portion as shown in FIG. (6a) Basically, it should be in the same direction as the bisector of the inner angle of (6b). When the groove (5) is formed in the direction of the bisector of the inner corner of the corner (6a) (6b), the back plate (2), the outer piece (3) or the clamping piece ( This is preferable because the reduction in the plate thickness of 4) can be minimized and the decrease in clamping force can be suppressed.
[0025]
The center line of the cross-sectional shape of the groove (5) and the bisector of the inner angle of the corners (6a) and (6b) do not necessarily coincide with each other, but the center line and the angle of the cross-sectional shape of the groove (5) It is preferable to reduce the angle formed by the bisector of the inner angle of the portions (6a) and (6b). When this angle increases, the plate thickness of the back plate (2), exterior piece (3) or clamping piece (4) at the portion where the groove (5) is formed decreases, and the clamping force decreases. It is for suppressing the fall of the.
[0026]
In the first and second embodiments, the depth of the groove (5) is 0.2 mm and is based on about 10% of the plate thickness, but can be increased or decreased. However, if the groove portion (5) is deepened, the thickness of the portion is reduced accordingly, and the clamping force is reduced. Therefore, the depth of the groove portion (5) that can secure the necessary clamping force is limited.
[0027]
(Example 3)
In the edge protector (1) according to the third embodiment of the present invention, as shown in FIG. 5, in addition to the configuration of the first or second embodiment, the cross-sectional shape of the back plate (2) is convex inward. A convex portion (10) is formed on the surface. As a result, the thickness of the back plate (2) is greater at the inner center than at both ends. For this reason, the rigidity of the back plate (2) is increased, and the bending of the back plate (2) is reduced when the exterior piece (3) and the holding piece (4) are opened, and the holding force can be secured. Further, by increasing the thickness of the back plate (2) uniformly, the rigidity of the back plate (2) may be increased to secure the clamping force.
[0028]
The edge protector (1) according to each embodiment of the present invention described above uses polypropylene as a material, but is not limited to this, and other thermoplastic synthetic resins such as polyacetal may be used. it can. However, a soft synthetic resin material having a hardness that does not damage the mounting portion of the edge protection device (1) and the other automobile door panel (D) is used. Further, the edge protector (1) according to the embodiment of the present invention is a resin molded product having a cross-sectional shape of the edge protector (1) obtained by the extrusion molding means of the plastic resin, for each fixed length. It can be manufactured by cutting into pieces.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of an edge protector (1) according to a first embodiment.
FIG. 2 is a simplified side view of the edge protector (1) according to the first embodiment.
FIG. 3 is an explanatory diagram of the shape of the groove (5) of the edge protector (1) according to the first embodiment.
4 is a schematic side view of an edge protector (1) according to Embodiment 2. FIG.
FIG. 5 is a simplified side view of an edge protector (1) according to a third embodiment.
FIG. 6 is a simplified perspective view showing a use state of the edge protector (1) according to the embodiment.
FIG. 7 is an explanatory view showing a state in which the edge protector (1) is engaged with the protrusion (Da) of the automobile door panel (D).
FIG. 8 is a simplified perspective view of a conventional edge protector (1a).
FIG. 9 is a simplified side view of a conventional edge protector (1a).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Edge protector 2 Back plate 3 Exterior piece 4 Clamping piece 5 Groove part 5a Curved part 6a Corner part 6b Corner part 7 Elastic contact part 8 Guide part 9 Locking claw 10 Convex part D Automotive panel Da Projection

Claims (2)

Extending the sandwiching piece (4) and the exterior piece (3) to the back plate (2) to prevent scratches on the edge of the automobile door panel (D) during transportation in the automobile production process, etc. In the edge protector made of thermoplastic synthetic resin used for the door panel for automobiles (D), which is mounted by sandwiching the edge of D),
The free end of the sandwiching piece (4) has a locking claw (8) that engages with the protrusion of the automotive door panel (D), and a guide part (9) that opens the sandwiching piece (4) by pushing operation,
While having a resilient contact portion (7) in close contact with the outer surface of the door panel for automobile (D) at the free end of the exterior piece (3),
The corner (6a) formed by the back plate (2) and the exterior piece (3) and the corner (6b) formed by the back plate (2) and the holding piece (4) are cut into or inside the corner. An edge protector characterized in that a groove portion (5) having a substantially V-shaped cross section is formed.   The edge protector according to claim 1, wherein the thickness of the back plate (2) is changed so that the cross-sectional shape of the back plate (2) is convex inward.

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