JP2014004894A - Resin lid structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin lid structure for a vehicle capable of securing sufficient strength about a hinge attachment part and a formation part of a striker part.SOLUTION: In a structure of a resin lid for a vehicle formed by performing injection molding of resin, the lid has a lid body, left and right hinge attachment parts formed at both left and right ends of a front end or a rear end of the lid body to have a hinge attached thereto, a striker part formed oppositely in a front and back direction from the hinge attachment parts in the lid body to be engaged with a latch mechanism of a vehicle body side, and a reinforced frame part extending along a direction of respectively connecting the left and right hinge attachment parts and the striker part to connect them, respective formation parts of the left and right hinge attachment parts and the striker part are respectively provided with a resin injection part during injection molding, and the striker part is formed as an integral structure with at least the reinforced frame part with resin during injection molding.

Description

  The present invention relates to a resin lid structure mounted on a vehicle.

  2. Description of the Related Art Conventionally, a lid such as a trunk lid or a bonnet hood mounted on a vehicle is provided with a striker portion for engaging a latch mechanism provided on the vehicle body side in order to fix the lid to the vehicle body. In general, a lid is well known in which a striker portion made of metal as a separate part from the lid body is assembled to a lid body made of a steel plate by screws, adhesion, or the like.

  On the other hand, in recent years, in order to further improve the weight reduction of the vehicle body as well as the improvement of engine combustion in order to improve the fuel efficiency, the weight of the lid constituting the vehicle body has also been reduced. Specifically, a technology that reduces the weight while securing the strength of the lid has been put into practical use by forming a lid with a resin instead of a steel plate, and further using a fiber reinforced resin containing carbon fiber or the like as the resin. Yes.

  For example, Patent Document 1 includes an outer resin layer made of a solid resin and a foam layer having a low resin density, which is integrally formed on the back surface of the outer resin layer and covered with a skin layer made of a solid resin. A technology relating to a resin vehicle exterior resin panel such as a bonnet hood, in which a base resin layer is provided and ribs are provided on the back side of the base resin layer substantially in a net shape.

  Further, Patent Document 2 discloses a carbon fiber reinforced plastic composed of an outer that spreads over the entire surface of the bonnet, and a frame-shaped inner that is joined to only the front edge and both side edges of the outer for reinforcement. The technology regarding the bonnet for vehicles which consists of is described.

JP 2011-195080 A JP 2006-306363 A

  Here, in general, in the case of injection molding in which resin flows in from a plurality of injection parts, the resins that have flowed in from different injection parts meet at a place apart from these injection parts. Further, depending on the shape of the molded product, the resin flowing from one injection part may branch and then meet. In general, there is a possibility that a weld line having a lower strength than other sites may be generated at the meeting position of the resins. Therefore, it is very important when designing the molded product to determine the location of the injection part so that the resins do not meet at a site where strength is required. However, none of the documents describes where the resin enters from the lid, which is a molded product, at the time of injection molding, and the location where the injection part is provided is unknown.

  Further, regarding a striker provided on a lid such as a bonnet hood, Patent Document 1 only describes that a fastening member, in which the striker is fastened with a nut, is fixed to the panel, and the striker is a panel that constitutes the lid. Is clearly a separate part. Patent Document 2 only describes that a striker is attached to or provided in a high-rigidity portion that extends the front edge of the bonnet, and any of the techniques described in any document manufactures the striker separately from the panel. A separate manufacturing process and an assembling process for assembling a separate striker to the panel are required.

  Furthermore, in order to assemble the striker to the panel, for example, when bonded by an adhesive or the like, if the bonding strength at this bonded portion is insufficient, the bonded portion breaks due to repeated opening / closing of the lid, vibration of the vehicle body, etc. There is a fear. In addition, if the striker joining area is increased in order to increase the joining strength at the joined portion, the striker mass increases.

  Furthermore, when the material forming the panel and the striker is different, for example, when the panel is formed of carbon fiber-containing resin and the striker is formed of metal, electricity flows from the panel to the striker. As a result, the striker may rust, so-called galvanic corrosion. To prevent this electrolytic corrosion, the striker is plated for rust prevention, the panel is processed so that the carbon fibers inside do not appear, and the panel and striker are connected via a non-conductive adhesive. Various technical restrictions will occur in the assembly process and processing process.

In order to solve the above-mentioned problem, the invention according to claim 1
In the structure of the resin lid for vehicles formed by injection molding resin,
The lid is
The lid body,
Left and right hinge mounting portions that are formed at the left and right ends of the front end portion or the rear end portion of the lid body, and to which hinges for rotatably connecting to the vehicle body are mounted
A striker portion that is formed on the opposite side of the lid main body in the front-rear direction in the lid body and engages a latch mechanism on the vehicle body side for locking the vehicle body;
A reinforcing frame part extending and connecting along the direction connecting the left and right hinge mounting parts and the striker part,
Each of the left and right hinge mounting portions and the striker portion is provided with a resin injection portion at the time of the injection molding,
The striker portion is formed as an integral structure with at least the reinforcing frame portion by the resin during the injection molding.

The invention according to claim 2
In the invention according to claim 1,
The striker portion is configured in a substantially U shape by two leg portions erected in a vertical direction from a striker portion forming surface portion of the lid main body, and a connecting portion connecting the tip end portions of the leg portions,
The injection part provided in the formation part of the striker part is provided in a part corresponding to a base end part of one of the leg parts in the surface part,
Between the base end portions of the two leg portions in the surface portion, an opening portion for bypassing the resin flowing into the surface portion of the resin injected from the injection portion of the surface portion during the injection molding is provided. It is characterized by being.

The invention according to claim 3
In the invention according to claim 2,
The opening is the other of the resin that flows into the surface portion from the injection portion provided in a portion corresponding to the base end portion of the one leg portion of the striker portion during the injection molding and bypasses the opening portion. The leg has a shape dimension that makes the arrival of the resin flowing through the inside of the striker part slower than the arrival of the other leg part at the base end.

The invention according to claim 4
In the invention which concerns on any one of Claim 2 or 3,
It is provided on the opposite side to the projecting side of the striker part with respect to the surface part, and has a vertical wall part continuously extending in the extending direction of the leg part from the base end part of the other leg part. .

The invention according to claim 5
In the invention according to any one of claims 1 to 4,
The resin is a carbon fiber-containing resin.

  According to the first aspect of the present invention, each of the forming portions of the striker portion and the left and right hinge mounting portions connected to each other by the reinforcing frame portion is provided with an injection portion of the resin at the time of injection molding. In these hinge mounting part and striker part forming part, where force is applied at the time of opening and closing and the vibration of the vehicle body, the resin flowing into the mold from different injection parts does not meet and can suppress the generation of weld lines Since the striker part has an integral structure with the reinforcing frame part, sufficient strength can be secured at the hinge attachment part and the formation part of the striker part.

  In addition, since the striker part is formed by injection molding as an integral structure with the reinforcement frame part, there is no joint part between the striker part and the reinforcement frame part, so it is necessary to worry about the durability of the joint part. In general, the strength of the molded product formed by injection molding is stable under a certain molding condition, so that the reliability of the striker portion can be improved.

  Furthermore, since the striker part and the reinforcing frame part are a single part that has an integrated structure, the number of parts can be reduced by one, thereby reducing manufacturing costs and management costs, as well as a separate striker. Since the assembly process for integrating the part and the reinforcing frame part can be omitted, the assembly cost can be reduced.

  Furthermore, since the lid body and the striker part are formed of the same resin material at the time of injection molding, there is no need to worry about the rust of the striker part due to electrolytic corrosion.

  According to the second aspect of the present invention, since the injection portion is provided in a portion corresponding to the base end portion of one leg portion in the striker portion forming surface portion, the resin incident from the injection portion at the time of injection molding is a lid. It is divided into the thing which flows through the inside of the striker part formation surface part, and the thing which flows through the inside of the striker part. At this time, at the time of injection molding, the resin flowing through the striker portion forming surface portion of the lid and the resin flowing through the striker portion meet in the middle of the striker portion, and the weld line generated at the meeting portion may reduce the strength. However, by providing an opening between the base end portions of the two leg portions on the striker portion forming surface portion and appropriately setting the shape dimension of the opening portion, it is possible to avoid a meeting in the middle of the striker portion. Become.

  According to the invention which concerns on Claim 3, the shape dimension of an opening part is set so that the resin which detours an opening part and flows through the inside of a surface part may arrive later than the resin which flows through the inside of a striker part. Thus, it is possible to reliably avoid the association of these resins in the middle of the striker portion.

  According to the invention which concerns on Claim 4, by providing the vertical wall part continuously extended in the extending | stretching direction of this leg part from the leg part in the striker part formation surface part, resin which detours an opening part and flows in the inside of a surface part, and Even if the resin flowing inside the striker part meets each other at this vertical wall part to form a weld line, the stress applied to this weld line is not a shear stress but a tensile stress. The decrease in strength can be suppressed.

  According to the invention of claim 5, the carbon fiber is contained in the resin, thereby improving the strength and weight of the lid, and the carbon fiber is superior in lubricity compared to other fibers, so that the striker part Wear of the latch mechanism on the vehicle body side that engages with can be prevented.

1 is a rear perspective view of a vehicle equipped with a trunk lid having a lid structure according to an embodiment of the present invention. It is an exploded perspective view and a sectional view of a lid structure concerning an embodiment of the present invention. It is a top view which shows a mode that resin injects with time when the lid structure of FIG. 2 is injection-molded. It is an expansion perspective view which shows the flow of the resin in the striker part periphery of FIG. It is the expanded sectional view and enlarged plan view which show the flow of the resin in the striker part periphery of FIG. It is an expanded sectional view which shows the flow of the resin in the striker part periphery of a comparative example.

  Hereinafter, modes for carrying out the present invention will be described. In the description of each embodiment, in order to facilitate understanding, terms indicating directions (for example, “upward”, “downward”, “right”, “left”, etc.) are used as appropriate. These terms are not intended to limit the invention. In the accompanying drawings, the same components are referred to by the same reference numerals.

  First, an embodiment of a lid structure according to the present invention will be described in detail below with reference to FIGS.

  FIG. 1 is a rear perspective view of a vehicle equipped with a trunk lid having a resin lid structure according to an embodiment of the present invention. In FIG. 1, a two-door type vehicle 1 is shown, and a seat (not shown) made up of a driver seat and a passenger seat is disposed in a passenger compartment 2 of the vehicle 1. A trunk room 3 whose upper portion is covered with a trunk lid 10 is disposed behind the seat.

  FIG. 2 is an exploded perspective view and a cross-sectional view of the internal structure of the trunk lid 10 as viewed obliquely from above and behind the vehicle. In the drawing, an arrow (FR) indicates the front of the vehicle body, an arrow (UP) indicates the upper side of the vehicle body, and an arrow (LH) indicates the left side of the vehicle body.

  As shown in FIG. 2, the trunk lid 10 includes an outer panel 11 outside the vehicle body and an inner panel 12 inside the vehicle body. Here, the inner panel 12 is formed from resin by injection molding, and the outer panel 11 is also formed from resin by injection molding in the same manner as the inner panel 12. However, the outer panel 11 is not necessarily made of the same material as that of the inner panel 12, and may be formed of, for example, a steel plate. The outer panel 11 and the inner panel 12 are joined so as to be integrated with each other.

  The inner panel 12 connects the inner panel main body 23 (lid main body) having a hollow portion at the center extending along the outer edge of the outer panel 11 and the trunk lid 10 so as to be rotatable with respect to the vehicle body (not shown). Hinge attachment portions 22 and 22 for attaching hinges, and a striker portion 21 for engaging a latch mechanism (not shown) on the vehicle body side. Here, the hinge mounting portions 22 and 22 are provided at both ends in the left-right direction (vehicle width direction) of the front end portion of the inner panel main body 23, and the striker portion 21 is a rear end portion of the inner panel main body 23. Is provided at an intermediate point in the left-right direction.

  In addition, when the trunk lid 10 is substantially horizontal and the trunk room 3 is closed as shown in FIG. 1, the trunk lid 10 includes left and right hinge mounting portions 22, 22, a striker portion 21, and a latch mechanism. It is held at three points by the locking device.

  The first injection portion 31 and the second injection for allowing the resin to enter the mold during injection molding are formed on the formation portion of the striker portion 21 and the formation portions of the left and right hinge attachment portions 22 and 22 in the inner panel 12. Portions 32 and 32 are provided, respectively.

  Further, the inner panel 12 has a frame portion that straddles the hollow portion of the inner panel body 23 in order to reinforce the trunk lid 10. As the frame part, left and right reinforcing frame parts 24 and 24 for connecting the left and right hinge attaching parts 22 and 22 and the striker part 21 respectively, and an intermediate point between the left and right hinge attaching parts 22 and 22 and the striker part 21 are provided. And a central reinforcing frame portion 25 to be connected.

  Further, the inner panel 12 includes first branch portions 26 and 26 and second branch portions 27 and 27 that branch from the middle of the left and right reinforcing frame portions 24 and 24 and the central reinforcing frame portion 25, respectively. Here, the first branch portions 26, 26 branch outward from the left and right reinforcing frame portions 24, 24, that is, the meeting position of the resin flowing from both ends of the left and right reinforcing frame portions 24, 24 during injection molding. One end is connected to a portion corresponding to the first injection portion 31 provided in the formation portion of the striker portion 21 in the inner panel body 23 and the second injection portion 32 provided in the formation portion of the hinge mounting portions 22 and 22. , 32 and the other end are connected to the site corresponding to the meeting position of the resin flowing in. The second branch portions 27 and 27 branch from the left and right reinforcing frame portions 24 and 24 toward the center, that is, correspond to the meeting positions of the resin flowing from both ends of the left and right reinforcing frame portions 24 and 24. The site | part and the site | part corresponded to the meeting position of the resin which flows in from the both ends of the center reinforcement flame | frame part 25 are connected.

  Furthermore, the embodiment of the present invention includes a branch portion that branches at an acute angle with respect to the reinforcing frame portions 24, 25, and specifically, with respect to the left and right reinforcing frame portions 24, 24, The first branch portions 26 and 26 form an acute angle, but the second branch portions 27 and 27 extend in a substantially vertical direction. Here, the “acute angle” means that the angle formed between the left and right reinforcing frame portions 24 and the first branch portions 26 and 26 is not perpendicular to the first branch portions 26 and 26. Any of the left and right corners may be acute.

  Next, the shape of the inner panel 12 will be described in more detail with reference to cross-sectional views taken along the lines AA, BB, and CC in FIG.

  As can be seen from the cross-sectional view taken along the line AA, the striker portion 21 includes two leg portions projecting substantially vertically downward from the striker portion forming surface portion 23a of the inner panel body 23, and the tips of the leg portions. It is comprised from the connection part to connect, and is a member which makes a substantially U shape by a side view. The base end of one leg is provided with a first injection part 31 for projecting resin into the mold, which protrudes substantially vertically upward from the striker part forming surface part 23a of the inner panel body 23. ing. The configuration of the striker unit 21 will be described in more detail later.

  And the inner panel main body 23 has the horizontally long opening part 28 between the base end parts of two legs of the striker part 21 in the striker part formation surface part 23a. Moreover, the inner panel main body 23 has a vertical wall portion 29 continuously extending substantially vertically upward from a base end portion of a leg portion constituting the striker portion 21 on which the first injection portion 31 is not provided. . The configuration of the opening 28 and the vertical wall 29 will be described in detail later.

  As can be seen from the cross-sectional views taken along the lines BB and CC, the left and right reinforcing frame portions 24 and 24 and the central reinforcing frame portion 25 both have a substantially U-shaped cross section.

  Here, although the inner panel 12 is a resin molded product by injection molding, the resin used as a raw material at this time is a carbon fiber-containing resin in which strength is improved by adding carbon fibers to a matrix resin.

  The resin that can be used as the matrix resin is not particularly limited as long as it is a resin that is generally used in the field of injection molding. For example, polypropylene (PP), alloy of polycarbonate and polyethylene terephthalate (PC / PET), polycarbonate and poly An alloy of butylene terephthalate (PC / PBT), an alloy of polyamide and polyphenylene ether (PA / PPE), or a resin obtained by blending two or more of these may be used.

  In the embodiment of the present invention, a resin added with carbon fiber having excellent lubricity is used to prevent wear of the latch mechanism on the vehicle body side that engages with the striker portion 21, but the added fiber is limited to this. It is not a thing and can be suitably selected in consideration of characteristics required for the trunk lid 10, and may be, for example, a glass fiber, an aramid fiber, or the like. Moreover, also when using carbon fiber, the characteristic of resin can be changed suitably by adjusting the content, a fiber diameter, an aspect-ratio, etc.

  FIG. 3 is a plan view showing a state in which the resin is incident with time during the injection molding of the inner panel 12 of FIG. In actual injection molding, the resin flows through the mold, but the drawing shows the portion of the inner panel 12 itself that has been molded without drawing the mold and that is filled with the resin during injection molding. By expressing with hatching, the flow of resin in the mold is schematically expressed.

  Further, in the following explanation, the expression “the resin flows through a predetermined part of the molded product during injection molding” is used for the sake of simplification, but actually, the molded product is not yet formed during the injection molding. Therefore, the above expression accurately means that the resin flows through a corresponding portion of the mold that forms the predetermined portion of the molded product at the time of injection molding.

  First, in FIG. 3A, at the time of injection molding, first, resin is incident on the mold from the first injection portion 31 provided in the formation portion of the striker portion 21. The resin incident from the first injection portion 31 flows forward (in the FR direction in the figure) through the inside of the striker portion 21 and branches inside the striker portion forming surface portion 23a to the left and right around the opening portion 28. It flows forward while detouring. The resins flowing from these three sides meet each other at the vertical wall portion 29.

  Next, in FIG. 3B, the second injection portion 32 provided at the ends of the left and right hinge mounting portions 22, 22 after a predetermined time has elapsed since the start of the resin injection from the first injection portion 31. , 32 is incident on the resin. Here, the incident timing from the first emitting portion 31 and the incident timing from the second emitting portions 32 and 32 are shifted. However, the resin is incident at any timing from the first and second emitting portions 31 and 32. Whether to do this is determined as appropriate in consideration of the shape of the mold and the desired meeting position.

  Next, in FIG. 3C, the resin incident from the first and second injection portions 31 and 32 flows around the central hollow portion of the inner panel body 23, and the first and second injection portions 31 and 32. The left and right reinforcing frame portions 24, 24 that connect each other also flow from both ends thereof. Further, the resin incident from the first injection portion 31 also flows from one end to the central reinforcing frame portion 25.

  Next, in FIG. 3D, the resin that has flowed in from both ends of the left and right reinforcing frame portions 24, 24 meets near the center of the left and right reinforcing frame portions 24, 24, and branches at a portion corresponding to this meeting position. Flows into the first branching portions 26 and 26 and the second branching portions 27 and 27. Further, during this time, the resin flowing in from the left and right second injection portions 32, 32 meets at the midpoint between the second injection portions 32, 32 in the inner panel body 23, and is connected to a portion corresponding to this meeting position. The resin flows in from one of the reinforcing frame portions 25, and further meets with the resin flowing in from the other of the central reinforcing frame portions 25, and flows into the second branch portions 27 and 27 branched at the meeting position. Further, during this time, the resin that has entered from the first injection portion 31 and the second injection portions 32 and 32 and flows around the central hollow portion of the inner panel main body 23 meets at the inner panel main body 23, and is associated therewith. Resin flows from the other end into the first branch portions 26 and 26 branched from the position.

  Finally, although not shown, thereafter, the resin that has flowed in from both ends of the first branch portions 26 and 26 and the second branch portions 27 and 27 meets in the middle of each branch portion 26 and 27.

  In FIG. 3, the meeting position ML, which is the position where the resins meet in the mold during injection molding, is indicated by a thin dotted line, and the weld line WL is generated on the surface of the molded product by the resin solidifying at the meeting position ML. The location where the possibility of doing so is relatively high is indicated by a thin solid line.

  As described above, when the resin is incident at the time of injection molding, the injection portions 31 and 32 are provided in the respective formation portions of the left and right hinge attachment portions 22 and 22 and the striker portion 21 connected to each other by the reinforcing frame portion. In these hinge mounting portions 22 and 22 and the striker portion 21 where force is applied when the trunk lid 10 is opened and closed or when the vehicle vibrates, the resins that have flowed into the mold from different injection portions 31 and 32 It is possible to prevent the occurrence of the weld line WL without meeting, and since the striker portion is integrally formed with the reinforcing frame portion, it is possible to ensure sufficient strength at the hinge mounting portions 22, 22 and the formation portion of the striker portion 21. is there.

  From here, the specific structure of the striker part 21 which is the characteristic of this invention and its effect are demonstrated in detail, referring FIG. 4 and FIG.

  4, FIG. 5 (a) and FIG. 5 (b) are respectively an enlarged perspective view, an enlarged sectional view and an enlarged plan view showing the flow of resin around the striker portion 21 of FIG. In any of the drawings, the flow of resin at the time of injection molding around the same striker portion 21 is seen from different angles. In FIG. 4 as well, similarly to FIG. 3, a thin solid line indicates a place where the possibility that the weld line WL is generated on the surface of the molded product is relatively high.

  First, the striker unit 21 and the surrounding structure will be described.

  As shown in FIG. 5 (a), the striker portion 21 includes two leg portions 21a projecting substantially vertically downward from the striker portion forming surface portion 23a, and a connection for connecting the tips of the leg portions 21a to each other. The member 21b is a member having a substantially U shape in a side view.

  Further, a first portion for projecting the resin into the mold is projected from the striker portion forming surface portion 23a substantially vertically upward at a portion corresponding to the base end portion of the one leg portion 21a in the striker portion forming surface portion 23a. An injection unit 31 is provided.

  Then, the striker portion forming surface portion 23a of the inner panel main body 23 is horizontally long (half-moon shape in FIG. 5B) between the base end portions of the two leg portions 21a of the striker portion 21. 28.

  Furthermore, the inner panel main body 23 has a vertical wall portion 29 (a first wall portion 29 that extends continuously vertically upward from the base end portion of the other leg portion 21a where the first injection portion 31 is not provided at the corresponding portion of the base end portion. 5 (b) has a concave shape).

  Next, the flow of the resin at the time of injection molding in the striker part 21 and its periphery will be described.

  As shown by a dotted arrow a in FIG. 5 (a), the resin incident from the first injection portion 31 provided at a location corresponding to the base end portion of one leg portion 21a in the striker portion forming surface portion 23a is a striker portion. It flows forward through the inside of 21 (FR direction in the figure). On the other hand, as shown by dotted arrows b and b in FIG. 5B, the resin incident from the first injection portion 31 flows forward while bypassing the periphery of the opening portion 28 of the inner panel main body 23 left and right.

  As shown by dotted arrows a and b in FIG. 4, the resins flowing from these three directions meet each other at the vertical wall portion 29. Further, the resin incident from the first injection portion 31 further flows to the reinforcing frame portions 24 and 25 at the tip of the vertical wall portion 29 and other portions of the inner panel main body 23.

  Therefore, the striker portion 21 is formed as an integral structure with the reinforcing frame portions 24 and 25 by resin during injection molding. As a result, there is no joint between the striker part 21 and the reinforcing frame parts 24, 25, so there is no need to worry about the durability of the joint, and the strength of a molded product generally formed by injection molding is constant. Since it is stable under the molding conditions, the reliability of the striker portion 21 can be improved. In addition, since the number of parts can be reduced by one, manufacturing costs and management costs can be reduced by this, and an assembling process for integrating separate parts can be omitted, so that assembling costs can also be reduced. .

  Here, as shown by a dotted arrow in FIG. 6 for explaining the comparative example, if the inner panel body 23 is not provided with the opening 28, the inside of the surface portion corresponding to the opening 28 is also resin during injection molding. This resin further flows into the striker portion 21 from the base end portion of the other leg portion 21a, and the resin flowing into the striker portion 21 from the first injection portion 31 and the middle of the striker portion 21. There is a risk of meeting at.

  However, by providing the opening 28 between the base end portions of the two leg portions 21a in the striker portion forming surface portion 23a as in the present invention, the inside of the striker portion forming surface portion 23a from the first injection portion 31 during injection molding. Since the flowing resin flows around the periphery of the opening portion 28, the arrival of the resin at the base end portion of the other leg portion 21a can be delayed by the amount of bypassing. Therefore, it is possible to avoid a meeting in the middle of the striker portion 21 by appropriately setting the shape and size of the opening 28.

  Further, by setting the shape and size of the opening 28 so that the resin flowing in the striker portion forming surface portion 23a bypassing the opening 28 arrives later than the resin flowing in the striker portion 21, the striker portion It is possible to reliably avoid the association of these resins in the middle of 21. Therefore, it is possible to prevent the weld line WL from occurring in the middle of the striker part 21 and to prevent the strength of the striker part 21 from being lowered.

  Further, as shown by thin lines in FIG. 4, when a weld line WL is generated at the meeting position in the vertical wall portion 29, even if a tensile stress is applied to the striker portion 21 when the trunk lid 10 is opened and closed, the tensile stress is Since it is substantially parallel to the direction in which the wall portion 29 extends, tensile stress is applied to the weld line WL.

  Temporarily, when there is no vertical wall portion 29 as in the embodiment of the present invention, that is, the base end portion periphery of the leg portion 21a of the striker portion 21 is configured only from a predetermined surface extending in a direction perpendicular to the leg portion 21a. When the weld line WL is generated by the resin meeting on the predetermined surface extending in the vertical direction, if a tensile stress is applied to the striker portion, a shear stress is applied to the weld line WL.

  Here, since the allowable tensile stress is generally larger than the allowable shear stress in material mechanics, the embodiment of the present invention in which the vertical wall portion 29 is provided is compared with the case in which the vertical wall portion 29 is not provided. Moreover, the strength reduction in the striker part 21 periphery can be suppressed.

  As described above, according to the present invention, the left and right hinge attachment portions 22 and 22 and the striker portion 21 are provided with the injection portions 31 and 32, and the striker portion 21 is integrally molded with the reinforcing frame portion 24 to be hinge-attached. Effects such as ensuring sufficient strength for the portions 22 and 22 and the formation portion of the striker portion 21 and improving the reliability of the striker portion 21 can be obtained.

  In the above-described embodiment, the case of the trunk lid has been described. However, the technology relating to the lid structure of the present invention may be applied to the hood.

  As described above, according to the present invention, with respect to the resin lid structure mounted on a vehicle, the hinge mounting portion and the striker portion are provided with the injection portion, and the striker portion is integrally formed with the frame portion by the injection molding. Sufficient strength can be secured for the attachment portion, the striker portion, and the formation portion thereof, and the reliability of the striker portion can be improved. Therefore, it may be suitably used in the industrial field of manufacturing a resin lid for vehicles such as a trunk lid.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car compartment 3 Trunk room 10 Trunk lid 11 Outer panel 12 Inner panel 21 Striker part 21a Leg part 21b Connection part 22 Hinge attachment part 23 Inner panel main body (lid main body)
23a striker part forming surface part 24 left and right reinforcing frame part 25 central reinforcing frame part 26 first branch part 27 second branch part 28 opening part 29 vertical wall part 31 first injection part 32 second injection part WL weld line ML meeting position

Claims (5)

In the structure of the resin lid for vehicles formed by injection molding resin,
The lid is
The lid body,
Left and right hinge mounting portions that are formed at the left and right ends of the front end portion or the rear end portion of the lid body, and to which hinges for rotatably connecting to the vehicle body are mounted;
A striker portion that is formed on the opposite side of the lid main body in the front-rear direction in the lid body and engages a latch mechanism on the vehicle body side for locking the vehicle body;
A reinforcing frame part extending and connecting along the direction connecting the left and right hinge mounting parts and the striker part,
Have
Each of the left and right hinge mounting portions and the striker portion is provided with a resin injection portion at the time of the injection molding,
The resin-made lid structure for a vehicle, wherein the striker portion is formed integrally with at least the reinforcing frame portion by the resin during the injection molding. In the invention according to claim 1,
The striker portion is configured in a substantially U shape by two leg portions erected in a vertical direction from a striker portion forming surface portion of the lid main body, and a connecting portion connecting the tip end portions of the leg portions,
The injection part provided in the formation part of the striker part is provided in a part corresponding to a base end part of one of the leg parts in the surface part,
Between the base end portions of the two leg portions in the surface portion, an opening portion for bypassing the resin flowing into the surface portion of the resin injected from the injection portion of the surface portion during the injection molding is provided. A resin-made lid structure for a vehicle. In the invention according to claim 2,
The opening is the other of the resin that flows into the surface portion from the injection portion provided in a portion corresponding to the base end portion of the one leg portion of the striker portion during the injection molding and bypasses the opening portion. The vehicle resin is characterized in that the reaching of the base end of the leg portion is slower than the arrival of the resin flowing through the inside of the striker portion to the base end portion of the other leg portion. Made of lid structure. In the invention which concerns on any one of Claim 2 or 3,
It is provided on the opposite side to the projecting side of the striker part with respect to the surface part, and has a vertical wall part continuously extending in the extending direction of the leg part from the base end part of the other leg part. Plastic lid structure for vehicles. In the invention according to any one of claims 1 to 4,
The resin lid structure for a vehicle, wherein the resin is a carbon fiber-containing resin.

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