JP3617132B2

JP3617132B2 - Tonneau cover reinforcement structure

Info

Publication number: JP3617132B2
Application number: JP20622295A
Authority: JP
Inventors: 久晃堤
Original assignee: Toyota Industries Corp
Current assignee: Toyota Industries Corp
Priority date: 1995-08-11
Filing date: 1995-08-11
Publication date: 2005-02-02
Anticipated expiration: 2015-08-11
Also published as: JPH0952557A

Description

【０００１】
【発明の属する技術分野】
本発明は自動車の荷収容室の上部を塞ぐトノカバーに係り、詳しくはトノカバーの引き出しの際に把持される操作部材の補強構造に関する。
【０００２】
【従来の技術】
図６は、トノカバーの不使用状態を示し、図７は、トノカバーの使用状態を示す。トノカバー４０を使用していないとき、図６に示すように、荷収容室４１の上部が開放され、車内から荷収容室４１の荷物等を取り出したり、荷収容室４１に大きな荷物等を収納したりすることができる。また、トノカバー４０の操作部材４２を後方に引き、操作部材４２の両側に設けたフック４３をデッキサイドトリムボードＢに形成した支持部材４４に引っかけることにより、荷収容室４１の上部は、図７に示すように、トノカバー４０によって塞がれる。
【０００３】
図８は操作部材４２の内部構造を説明するための要部斜視図、図９は操作部材４２の側断面図、図１０は操作部材４２の正断面図である。
操作部材４２は、補強部材４５、及び段ボール紙よりなる基材４６がレザー４０ａで被覆されている。補強部材４５は、鋼板を断面コ字状に屈曲して形成され、その補強部材４５に基材４６を差し込み同補強部材４５に対して接着剤にて固着した構造である。操作部材４２の両側部下面にフック４３がリベット４７を介して補強部材４５と連結固定されている。
【０００４】
【発明が解決しようとする課題】
ところで、前記補強部材４５は、断面コ字状の鋼板で形成されているため、剛性がある一方弾性変形量は小さい。従って、トノカバーの使用時に誤って操作部材４２に手をついたりして操作部材４２に対して大きな負荷がかかったとき、弾性変形して負荷を吸収することができず補強部材４５が図１１に示すように塑性変形したり、逆にフック４３や支持部材４４が破損したりすることが多々生じていた。
【０００５】
本発明は上記問題点を解決するためになされたものであって、その目的はトノカバーの使用時に誤って操作部材に手をついたりして操作部材に対して大きな負荷がかかっても、操作部材の塑性変形や、フック及び支持部材の破損を防止することができるトノカバーの補強構造を提供することにある。
【０００６】
【課題を解決するための手段】
上記問題を解決するために、請求項１の発明では、自動車の荷収容室の一端から操作部材にて引き出され荷収容室の他端両側壁に設けた支持部材に対して操作部材の両端部に設けたフックを係止することにより荷収容室の上面開口部を閉塞するトノカバーであって、操作部材はその上方から負荷が加わった場合、その負荷による塑性変形を始める前に、弾性変形により撓み、その撓みによって前記フックが前記支持部材から外れるように補強部材を設け、補強部材は鋼板と鋼線とからなり、鋼板の一側面に鋼線を固着するとともに基材を固着し、鋼板の両端部にフックを取着した。
【０００８】
請求項２の発明では、自動車の荷収容室の一端から操作部材にて引き出され荷収容室の他端両側壁に設けた支持部材に対して操作部材の両端部に設けたフックを係止することにより荷収容室の上面開口部を閉塞するトノカバーであって、操作部材はその上方から負荷が加わった場合、その負荷による塑性変形を始める前に、弾性変形により撓み、その撓みによって前記フックが前記支持部材から外れるように補強部材を設け、前記補強部材は鋼板と鋼管とからなり、鋼板の一側面に鋼管を固着するとともに基材を固着し、鋼板の両端部にフックを取着した。
【０００９】
従って、請求項１，２の発明によれば、トノカバーの操作部材にその上方からの負荷が加わった場合、補強部材は塑性変形を始める前に、弾性変形による撓みによってフックの間隔が支持部材の間隔よりも狭くなり、支持部材からフックが外れるようにされることから、トノカバーの操作部材は上方からの負荷に対して破損しない。
【００１０】
また、請求項１の発明によれば、補強部材は、その基材が鋼線と鋼板とからなる補強部材に対して補強されている。また、その補強部材は鋼線と鋼板とからなる複合体である。従って、補強部材の断面２次モーメントが大きくなり、弾性変形を保持しつつ、一定の剛性を保持することができる構造となる。
【００１１】
また、請求項２の発明によれば、鋼管は穴が貫通しているため操作部材はより軽量化が図れる。
【００１２】
【発明の実施の形態】
本発明を具体化した実施の一形態を図１〜図３に従って説明する。尚、本実施の形態のトノカバーはトノカバーの操作部材の内部構造が前記した従来と相違するのみである。従って、説明の便宜上、操作部材の内部構造についてのみ説明する。
【００１３】
図１はトノカバー操作部材の内部構造を示す斜視図、図２はトノカバー操作部材の側断面図、図３は操作部材の断面図である。
トノカバーの先端部に設けられた操作部材１は、基材２、同基材２を補強する補強部材３及びフック４とから構成されている。そして、基材２と補強部材３は、図示しないスポンジ材とともにトノカバーを形成するレザー５で被覆されている。補強部材３は、操作部材１の長手方向にのびる厚さ約０．１ｃｍの細長い鋼板３ａと、同じく長手方向にのびる約０．６ｃｍの直径を有する断面円形の鋼線３ｂとから構成されている。
【００１４】
鋼線３ｂは鋼板３ａの上面前端部にスポット溶接にて固着されている。鋼板３ａの鋼線３ｂ溶接部を除く上面には基材２が接着剤にて固着されている。
基材２は、厚さ約０．５ｃｍ、幅約１０ｃｍ及び長さが鋼板３ａと同じ長さで形成された段ボール紙よりなり、鋼板３ａより後方に突出している。従って、段ボール紙よりなる基材２は、鋼板３ａと鋼線３ｂとからなる補強部材３にて補強される。操作部材１の両側部下面には、図３に示すように鋼材よりなるフック４がリベット６を介して鋼板３ａと連結固定されている。
【００１５】
次に、操作部材１の両フック４が図７に示すように、デッキサイドトリムボードＢに形成した支持部材４４に引っかけて、荷収容室４１の上部を塞いだ状態において、操作部材１に対して上方から負荷がかかった場合の作用について説明する。図２に示すように、補強部材３は鋼板３ａと鋼線３ｂとから構成される。鋼板３ａと鋼線３ｂはともに断面形状が均一で弾性変形し易く塑性変形し難い。そのため、補強部材３に上方から負荷がかかった場合、補強部材３は塑性変形を始める前に、弾性変形による撓みを持つ。その撓みによって左右のフック４間の間隔が左右にデッキサイドトリムボードＢに形成した左右の支持部材４４間の間隔よりも狭くなり、各支持部材４４からフック４が外れる。その結果、トノカバーの補強部材３、即ち操作部材１は長手方向と垂直の負荷に対して変形又は破損しない。更に、フック４及び支持部材４４の破損は未然に防止される。
【００１６】
尚、補強部材３は鋼板３ａと鋼線３ｂの複合体なので断面２次モーメントが大きいため、一定の剛性を有し負荷のかからないときには撓むこと無く所定の形状を維持することができる。
【００１７】
この実施の形態は以下に述べる特徴を有する。
（１）操作部材１の補強部材３は断面長方形の鋼板３ａと断面円形の鋼線３ｂを溶接したものである。鋼板３ａと鋼線３ｂはともに断面形状が均一なため弾性変形し易く塑性変形し難い。従って、操作部材１に上方から負荷がかかった場合、補強部材３は塑性変形を始める前に、弾性変形による撓みによってフック４間の間隔が支持部材４４間の間隔よりも狭くなり、操作部材１は支持部材４４から容易に外れる。その結果、操作部材１及び支持部材４４は破損しない。
【００１８】
（２）補強部材３は、鋼板３ａと鋼線３ｂとを溶接したものであるため、図心が鋼線３ｂの中心及び鋼板３ａの中心からずれる。
そのため補強部材３の断面２次モーメントが大きくなり、負荷に対して弾性変形がし難く軽量かつコンパクトな構造となる。つまり、弾性変形の同一を前提として鋼板３ａ又は鋼線３ｂの単一部材で補強部材３を形成した場合、単一部材の場合は断面２次モーメントが小さくなり、ある程度の剛性を保持するためにはそれだけ形状を大きくする必要がある。即ち、補強部材３の剛性を一定量保持しようとする場合、鋼線のみ又は鋼板のみで構成された補強部材では、その形状を大きくしなければならないのに比べて、本実施の形態では小さな径の鋼線、薄い板厚の鋼板で剛性を一定量保持することができる。
【００１９】
（３）補強部材３の鋼板３ａの板厚の変更及び外形形状の変更、鋼線３ｂの線径の変更により、
容易に補強部材３の断面２次モーメントを変更することができるので、負荷に対する弾性変形量及び剛性を要求値の通りに設定することが容易になる。
【００２０】
なお、本発明は上記形態に限定されることはなく、本発明の趣旨から逸脱しない範囲で以下のようにしてもよい。
（１）上記形態では、補強部材３は１つの鋼板３ａと１つの鋼線３ｂを溶接したものとしたが、図４に示すように、鋼管３ｂを溶接したものとしてもよい。
【００２１】
この場合、上記作用効果に加えてより操作部材１の軽量化が図れる。
（２）補強部材３は１つの鋼板３ａと１つ鋼線３ｂを溶接したものとしたが、図５に示すように１つの鋼線３ｂを２つの鋼板３ａによって挟み、溶接したものとしてもよい。この場合、より剛性を上げることができる。
【００２２】
（３）前記実施の形態では、鋼板３ａと鋼線３ｂとよりなる補強部材３が撓むことにより、支持部材４４からフック４が外れる構成にしたが、フック４の材質を合成ゴム等の撓むものにして実施してもよい。この場合、補強部材３が撓む必要がなく、フック４が撓むことにより、同フック４が支持部材４４から外れることになる。従って、前記実施の形態と同様に負荷が加わっても操作部材１及び支持部材４４は破損しない。
【００２３】
（４）前記実施の形態では、補強部材３を構成する鋼板３ａに段ボール紙よりなる基材２が固着されているが、基材２の材質をアクリル板等それ自身が撓むものにして実施してもよい。この場合、基材２は適度な剛性も有するため、操作部材１の形状も、長期間にわたって良好に維持される。
【００２４】
上記した実施の形態から見出される請求項以外の技術的思想について以下に記載する。
前記フックは、可撓性材料にて形成された。従って、負荷が加わっても操作部材及び支持部材を破損させることはない。
【００２５】
【発明の効果】
以上詳述したように、請求項１又は２の発明によれば、トノカバーの使用時に誤って操作部材に手をついたりして操作部材に対して大きな負荷がかかっても、操作部材の塑性変形や、フック及び支持部材の破損を防止することができる優れた効果を有する。
【００２６】
また、請求項２の発明によれば、操作部材をより軽量化することができる優れた効果を有する。
【図面の簡単な説明】
【図１】操作部材の内部構造を説明するための斜視図。
【図２】操作部材の側断面図。
【図３】操作部材の正断面図。
【図４】別例の補強部材を示す側面図。
【図５】別例の補強部材を示す側面図。
【図６】トノカバーの不使用状態を示す斜視図。
【図７】トノカバーの使用状態を示す斜視図。
【図８】従来の操作部材の内部構造を説明するための斜視図。
【図９】従来の操作部材の側断面図。
【図１０】従来の操作部材の正断面図。。
【図１１】従来の補強部材の塑性変形後の状態を示す斜視図。
【符号の説明】
１…操作部材、２…基材、３…補強部材、３ａ…鋼板、３ｂ…鋼線、４…フック、５…レザー、４１…荷収容室、４４…支持部材、Ｂ…デッキサイドトリムボード。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tonneau cover that closes an upper portion of a load storage chamber of an automobile, and more particularly to a reinforcing structure of an operation member that is gripped when the tonneau cover is pulled out.
[0002]
[Prior art]
FIG. 6 shows a non-use state of the tonneau cover, and FIG. 7 shows a use state of the tonneau cover. When the tonneau cover 40 is not used, as shown in FIG. 6, the upper portion of the load storage chamber 41 is opened, and the luggage in the load storage chamber 41 is taken out from the inside of the vehicle, or a large load is stored in the load storage chamber 41. Can be. Further, by pulling the operation member 42 of the tonneau cover 40 rearward and hooking the hooks 43 provided on both sides of the operation member 42 to the support member 44 formed on the deck side trim board B, the upper portion of the load storage chamber 41 is shown in FIG. As shown in FIG.
[0003]
FIG. 8 is a perspective view of a main part for explaining the internal structure of the operation member 42, FIG. 9 is a side sectional view of the operation member 42, and FIG. 10 is a front sectional view of the operation member 42.
In the operation member 42, a reinforcing member 45 and a base material 46 made of corrugated paper are covered with leather 40a. The reinforcing member 45 is formed by bending a steel plate into a U-shaped cross section, and has a structure in which a base material 46 is inserted into the reinforcing member 45 and fixed to the reinforcing member 45 with an adhesive. Hooks 43 are connected and fixed to the reinforcing members 45 via rivets 47 on the lower surfaces of both side portions of the operation member 42.
[0004]
[Problems to be solved by the invention]
By the way, since the reinforcing member 45 is formed of a steel plate having a U-shaped cross section, it has rigidity but has a small elastic deformation amount. Accordingly, when a large load is applied to the operation member 42 by mistakenly touching the operation member 42 when the tonneau cover is used, the load cannot be absorbed due to elastic deformation and the reinforcing member 45 is shown in FIG. As shown in the figure, the plastic deformation or the hook 43 and the support member 44 are often damaged.
[0005]
The present invention has been made to solve the above-mentioned problems, and the object thereof is to operate the operation member even if a large load is applied to the operation member by accidentally touching the operation member when using the tonneau cover. It is an object of the present invention to provide a reinforcing structure for a tonneau cover that can prevent plastic deformation and breakage of a hook and a support member.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, in the invention of claim 1, both end portions of the operation member with respect to the support members which are pulled out from one end of the load storage chamber of the automobile by the operation member and are provided on both side walls of the other end of the load storage chamber. A tonneau cover that closes the upper surface opening of the load storage chamber by locking a hook provided on the operation member.When a load is applied from above, the operation member is elastically deformed before starting plastic deformation due to the load. A reinforcing member is provided so that the hook is detached from the support member by the bending, and the reinforcing member includes a steel plate and a steel wire. The steel wire is fixed to one side of the steel plate and the base material is fixed. Hooks were attached to both ends .
[0008]
According to the second aspect of the present invention, hooks provided at both ends of the operation member are locked to support members that are pulled out from one end of the load storage chamber of the automobile by the operation member and provided on both side walls of the other end of the load storage chamber. The tonneau cover closes the upper surface opening of the load storage chamber, and when the operation member is loaded from above, the operation member bends by elastic deformation before starting plastic deformation due to the load, and the hook causes the hook to A reinforcing member was provided so as to be detached from the supporting member, and the reinforcing member was composed of a steel plate and a steel pipe. The steel tube was fixed to one side of the steel plate and the base material was fixed, and hooks were attached to both ends of the steel plate.
[0009]
Therefore, according to the first and second aspects of the present invention, when a load from above is applied to the operating member of the tonneau cover, the reinforcing member is bent by the elastic deformation before the start of plastic deformation so that the distance between the hooks of the supporting member is reduced. Since the distance is smaller than the distance and the hook is detached from the support member, the operation member of the tonneau cover is not damaged by the load from above.
[0010]
Moreover, according to invention of Claim 1 , the reinforcement member is reinforced with respect to the reinforcement member which the base material consists of a steel wire and a steel plate. The reinforcing member is a composite made of a steel wire and a steel plate. Therefore, the cross-sectional second moment of the reinforcing member is increased, and a structure capable of maintaining a certain rigidity while maintaining elastic deformation is obtained.
[0011]
According to the invention of claim 2 , since the hole penetrates the steel pipe, the operation member can be further reduced in weight.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment embodying the present invention will be described with reference to FIGS. The tonneau cover of the present embodiment is only different from the conventional one in the internal structure of the operation member of the tonneau cover. Therefore, only the internal structure of the operation member will be described for convenience of explanation.
[0013]
1 is a perspective view showing the internal structure of the tonneau cover operating member, FIG. 2 is a side sectional view of the tonneau cover operating member, and FIG. 3 is a sectional view of the operating member.
The operation member 1 provided at the tip of the tonneau cover includes a base material 2, a reinforcing member 3 that reinforces the base material 2, and a hook 4. And the base material 2 and the reinforcement member 3 are coat | covered with the leather 5 which forms a tonneau cover with the sponge material which is not shown in figure. The reinforcing member 3 is composed of an elongated steel plate 3a having a thickness of about 0.1 cm extending in the longitudinal direction of the operation member 1 and a steel wire 3b having a circular cross section having a diameter of about 0.6 cm which also extends in the longitudinal direction. .
[0014]
The steel wire 3b is fixed to the front end portion of the upper surface of the steel plate 3a by spot welding. The base material 2 is fixed to the upper surface of the steel plate 3a excluding the weld portion of the steel wire 3b with an adhesive.
The substrate 2 is made of corrugated paper having a thickness of about 0.5 cm, a width of about 10 cm, and a length that is the same as that of the steel plate 3a, and protrudes rearward from the steel plate 3a. Accordingly, the base material 2 made of corrugated paper is reinforced by the reinforcing member 3 made of the steel plate 3a and the steel wire 3b. As shown in FIG. 3, hooks 4 made of a steel material are connected and fixed to a steel plate 3 a via rivets 6 on the lower surfaces of both side portions of the operation member 1.
[0015]
Next, as shown in FIG. 7, the hooks 4 of the operation member 1 are hooked on the support member 44 formed on the deck side trim board B to close the upper portion of the load storage chamber 41. The operation when a load is applied from above will be described. As shown in FIG. 2, the reinforcing member 3 includes a steel plate 3a and a steel wire 3b. Both the steel plate 3a and the steel wire 3b have a uniform cross-sectional shape, are easily elastically deformed, and are not easily plastically deformed. Therefore, when a load is applied to the reinforcing member 3 from above, the reinforcing member 3 is bent by elastic deformation before plastic deformation starts. Due to the bending, the distance between the left and right hooks 4 becomes narrower than the distance between the left and right support members 44 formed on the left and right deck side trim boards B, and the hooks 4 are detached from the respective support members 44. As a result, the reinforcing member 3 of the tonneau cover, that is, the operation member 1 is not deformed or damaged with respect to a load perpendicular to the longitudinal direction. Further, the breakage of the hook 4 and the support member 44 is prevented in advance.
[0016]
In addition, since the reinforcing member 3 is a composite of the steel plate 3a and the steel wire 3b, since the secondary moment is large, it has a certain rigidity and can maintain a predetermined shape without being bent when it is not loaded.
[0017]
This embodiment has the following features.
(1) The reinforcing member 3 of the operation member 1 is obtained by welding a steel plate 3a having a rectangular cross section and a steel wire 3b having a circular cross section. Since both the steel plate 3a and the steel wire 3b have a uniform cross-sectional shape, they are easily elastically deformed and hardly plastically deformed. Therefore, when a load is applied to the operation member 1 from above, the interval between the hooks 4 becomes narrower than the interval between the support members 44 due to the bending of the reinforcing member 3 due to elastic deformation before the plastic member begins to be plastically deformed. Is easily removed from the support member 44. As a result, the operation member 1 and the support member 44 are not damaged.
[0018]
(2) Since the reinforcing member 3 is obtained by welding the steel plate 3a and the steel wire 3b, the centroid is shifted from the center of the steel wire 3b and the center of the steel plate 3a.
As a result, the moment of inertia of the cross section of the reinforcing member 3 is increased, resulting in a lightweight and compact structure that is not easily elastically deformed with respect to the load. That is, when the reinforcing member 3 is formed of a single member of the steel plate 3a or the steel wire 3b on the assumption that the elastic deformation is the same, in the case of the single member, the cross-sectional secondary moment is reduced, and a certain degree of rigidity is maintained. It is necessary to increase the shape accordingly. That is, when a certain amount of rigidity of the reinforcing member 3 is to be maintained, in the present embodiment, the diameter of the reinforcing member made of only a steel wire or only a steel plate has to be smaller than that of the reinforcing member 3 that has a small shape. A certain amount of rigidity can be maintained with the steel wire and the thin steel plate.
[0019]
(3) By changing the thickness of the steel plate 3a of the reinforcing member 3 and changing the outer shape, and changing the diameter of the steel wire 3b,
Since the cross-sectional secondary moment of the reinforcing member 3 can be easily changed, it becomes easy to set the elastic deformation amount and the rigidity with respect to the load as required values.
[0020]
In addition, this invention is not limited to the said form, You may make it as follows in the range which does not deviate from the meaning of this invention.
(1) In the said form, although the reinforcement member 3 shall weld one steel plate 3a and one steel wire 3b, as shown in FIG. 4, it is good also as what welded the steel pipe 3b.
[0021]
In this case, in addition to the above effects, the operation member 1 can be further reduced in weight.
(2) The reinforcing member 3 is obtained by welding one steel plate 3a and one steel wire 3b. However, as shown in FIG. 5, one steel wire 3b may be sandwiched between two steel plates 3a and welded. . In this case, the rigidity can be further increased.
[0022]
(3) In the above embodiment, the hook 4 is detached from the support member 44 when the reinforcing member 3 made of the steel plate 3a and the steel wire 3b is bent. However, the hook 4 is made of a material such as synthetic rubber. You may carry it out. In this case, the reinforcing member 3 does not need to bend, and the hook 4 is detached from the support member 44 when the hook 4 is bent. Therefore, the operation member 1 and the support member 44 are not damaged even when a load is applied as in the above embodiment.
[0023]
(4) In the above embodiment, the base material 2 made of corrugated paper is fixed to the steel plate 3a constituting the reinforcing member 3, but the base material 2 is made of a material such as an acrylic plate that is flexible. May be. In this case, since the base material 2 also has moderate rigidity, the shape of the operation member 1 is also well maintained over a long period of time.
[0024]
Technical ideas other than the claims found from the above-described embodiments will be described below.
Before SL hook, formed of a flexible material. Therefore, the operation member and the support member are not damaged even when a load is applied.
[0025]
【The invention's effect】
As described above in detail, according to the invention of claim 1 or 2, even if the operating member is accidentally touched when the tonneau cover is used and a large load is applied to the operating member, the plastic deformation of the operating member is performed. Moreover, it has the outstanding effect which can prevent a failure | damage of a hook and a supporting member.
[0026]
Further, according to the invention of claim 2, an excellent effect that it is possible to further reduce the weight of the operation member.
[Brief description of the drawings]
FIG. 1 is a perspective view for explaining an internal structure of an operation member.
FIG. 2 is a side sectional view of an operation member.
FIG. 3 is a front sectional view of an operation member.
FIG. 4 is a side view showing another example of a reinforcing member.
FIG. 5 is a side view showing another example of a reinforcing member.
FIG. 6 is a perspective view showing a state in which the tonneau cover is not used.
FIG. 7 is a perspective view showing a usage state of the tonneau cover.
FIG. 8 is a perspective view for explaining an internal structure of a conventional operation member.
FIG. 9 is a side sectional view of a conventional operation member.
FIG. 10 is a front sectional view of a conventional operation member. .
FIG. 11 is a perspective view showing a state after plastic deformation of a conventional reinforcing member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Operation member, 2 ... Base material, 3 ... Reinforcement member, 3a ... Steel plate, 3b ... Steel wire, 4 ... Hook, 5 ... Leather, 41 ... Load storage chamber, 44 ... Support member, B ... Deck side trim board.

Claims

The upper surface of the load storage chamber is secured by hooks provided at both ends of the operation member to the support members that are pulled out from one end of the load storage chamber of the automobile by the operation member and provided on both side walls of the other end of the load storage chamber. A tonneau cover for closing the opening,
When a load is applied from above, the operation member bends by elastic deformation before starting plastic deformation due to the load, and a reinforcing member is provided so that the hook is detached from the support member by the deformation ,
The reinforcing member comprises a steel plate and a steel wire, and a tonneau cover reinforcing structure in which a steel wire is fixed to one side of the steel plate, a base material is fixed, and hooks are attached to both ends of the steel plate .

The upper surface of the load storage chamber is secured by hooks provided at both ends of the operation member to the support members that are pulled out from one end of the load storage chamber of the automobile by the operation member and provided on both side walls of the other end of the load storage chamber. A tonneau cover for closing the opening,
When a load is applied from above, the operation member bends by elastic deformation before starting plastic deformation due to the load, and a reinforcing member is provided so that the hook is detached from the support member by the deformation,
The reinforcing member comprises a steel plate and a steel pipe, a tonneau cover reinforcing structure in which a steel pipe is fixed to one side of the steel plate, a base material is fixed, and hooks are attached to both ends of the steel plate .