JP3741423B2

JP3741423B2 - Detachable bed support leg structure

Info

Publication number: JP3741423B2
Application number: JP2001198031A
Authority: JP
Inventors: 和司小谷
Original assignee: 株式会社パブコ
Priority date: 2001-06-29
Filing date: 2001-06-29
Publication date: 2006-02-01
Anticipated expiration: 2021-06-29
Also published as: JP2003011716A

Description

【０００１】
【発明の属する技術分野】
本発明は，荷台を立起させるための支持脚構造物に関し，特に，車両に着脱可能な荷台を車両から外したときに，支持脚を自立位置に保持し，荷台を車両に取り付けたときに，支持脚を格納位置に保持する支持脚構造物に関する。
【０００２】
【先行技術】
車両の荷台は，車両と一体となるもののほか，車両に着脱自在のものもある。このような着脱式荷台は，荷物を積載して搬送するときは，車両に固定される（図１（A）を参照）。また，種々の目的から荷台を車両から取り外すことができるが，このとき，荷台に取り付けられた複数の支持脚が鉛直に配置される（１図（B））。
【０００３】
そして，図２のように，車両を移動させると，荷台は立起した状態となる。この状態で，荷台の上から荷物を搬出し，またはさらに荷物を積載することができる。
【０００４】
このような着脱式荷台では，荷物を積載するとき，たとえば車両が到着する前に，予め前記のように荷台を立起させ，所定の荷物を積載しておき，車両の到着次第，荷台を車両に固定して搬送することができる。かくして，着脱式荷台は，荷物の積載時間，車両の走行時間の有効利用を図ることができる。
【０００５】
このような着脱式荷台は，車両から外したときは，立起させるために，支持脚を自立位置に支持しなければならず，車両に取り付けたときは，車両の走行に支障がないようにするため，支持脚を格納位置に支持しなければならない。
【０００６】
先行技術では，かかる支持を行うために，支持脚の上端に，垂直に伸びるシャフトか設けられ，そのシャフトは，断面が矩形の第一の矩形部と，それに続く断面が円形の第一の円筒部，さらにそれに続く，第一の矩形部と同じ断面をもつ第二の矩形部，さらにそれに続く，第一の円筒部と同じ断面をもつ第二の円筒部を有する。このシャフトを支持するために，荷台を構成するフレームの下面に二枚の平行なプレートが設けられ，それらプレートには，シャフトの矩形部の断面と同じ断面形状の開口が整合するように設けられている。
【０００７】
シャフトの矩形部と，プレートの開口とが同じ（断面）形状であるため，シャフトの矩形部をその開口に整合させると軸線方向に移動可能である。一方，第一および第二の円筒部が，両プレートにそれぞれ位置すると，シャフトは軸線のまわりで回転可能となる。
【０００８】
こうした先行技術の支持脚構造物において，自立状態の支持脚を格納状態にするためには，シャフトの第一および第二の円筒部が，両プレートにそれぞれ位置するまでシャフトを軸線方向内側に移動させ，そしてシャフトに取り付けられた支持脚が水平となるまで，シャフトを軸線のまわりで回転させて，シャフトの矩形部を，プレートの開口に整合させ，さらにシャフトを軸線方向内側に移動させる。この状態ではシャフトは回転できないため，水平状態，すなわち格納状態に維持される。
【０００９】
格納状態の支持脚を自立させるためには，シャフトの第一および第二の円筒部が，両プレートにそれぞれ位置するまでシャフトを軸線方向外側に移動させ，そして，シャフトに取り付けられた支持脚が鉛直になるまで，シャフトを軸線のまわりに回転させて，シャフトの矩形部をプレートの開口に整合させ，さらに，シャフトを軸線方向外側に移動させる。この状態では，シャフトは回転できないため，鉛直状態，すなわち，自立状態に維持される。
【００１０】
【発明が解決しようとする課題】
支持脚は，通常荷台に四箇所で取り付けられてはいるが，自立位置にあるとき，荷台からの荷重は，プレートを介してシャフトに集中する。そのため，シャフトおよび支持脚との接合部およびプレートとフレームとの接合部は剛直にせざるを得ない。
【００１１】
しかし，荷台を着脱式にするためには，剛直を確保するための構成のための空間を，荷台の下方には確保しがたい。また，このような構成のために必要となる部材は全体の重量およびコストの増加を招く。
【００１２】
本発明は，係る問題を解決するためになされたものであり，荷台からの荷重を分散して支持することができる着脱式荷台の支持脚構造物を提供することを目的とする。
【００１３】
本発明の他の目的は，先行技術の着脱式荷台の構成を実質的に変更することなく，単純な構成をもつ上記着脱式荷台の支持脚構造物を提供することである。
【００１４】
【課題を解決するための手段】
本発明の，着脱式荷台の支持脚構造物は，荷台を構成するフレームと，荷台を立起させるための支持脚と，該支持脚の上端部に垂直に固定されたシャフトと，該シャフトを受け入れて，支持脚を格納位置と自立位置とで支持する，フレームの下面に固定された支持体と，含む。
【００１５】
シャフトは，共軸に，断面が矩形の第一の矩形部，断面が円形の第一の円筒部，第一の矩形部の断面と同じ断面をもつ第二の矩形部，および第一の円筒部と同じ断面をもつ第二の円筒部を順に有する。
【００１６】
第一の矩形部は，支持脚とは反対方向に突き出る突起を有し，円筒部は，矩形部の断面の内接円またはそれより小さい円の断面を有し，支持体は，荷台の下面にそれぞれ固定される平行な外側プレートおよび内側プレートを有する。各プレートは，シャフトの軸線方向の移動を可能にするために，それぞれ整合し，矩形部の断面とほぼ同じ形状の開口を有し，開口はさらに，突起と同形の補助切り欠き部を水平方向に有する。
【００１７】
シャフトの軸線方向の移動により，第一の円筒部が，外側プレートに位置するときに，第二の円筒部は内側プレートに位置して，シャフトは格納位置と自立位置との間で回転可能となる。
【００１８】
荷台の立起のためには，突起と補助切り欠き部を整合させた状態で，シャフトを軸線方向外側に移動させて，各円筒部が各プレートに位置したとき，シャフトを格納位置から自立位置まで回転させて，さらに，シャフトを軸線方向外側に移動させて，第二の矩形部を外側プレートに位置させるとともに，突起をフレームに接合させる。突起はフレームと接合することで，荷台からの荷重を分散させることができる。
【００１９】
ここで，シャフトは，さらに，第二の円筒部の先に，第一の矩形部と同じ断面をもつ第三の矩形部を有してもよい。第一の円筒部の長さと第二の円筒部の長さはほぼ等しくことが望ましく，第二の矩形部が，外側プレートに位置すると，第三の矩形部は内側プレートに位置することが望ましい。
【００２０】
支持構造物は，さらに，支持脚が自立位置にあって，突起がフレームに接合したとき，シャフトを固定するシャフトストッパーを有することが望ましい。また，支持構造物は，支持脚が格納位置にあるとき，支持脚を固定する支持脚ストッパーを有することが望ましい。
【００２１】
【発明の実施の形態】
図１は，本発明の支持脚構造物が組み込まれた荷台が車両に取り付けられるところ，および車両から取り外されるところ示す部分拡大図である。図１（A）に示されているように，荷台が車両に取り付けられているときは，支持脚は走行に支障がないように，格納され，図１（B）に示されているように，荷台が車両に取り外されているときは，支持脚は自立し，荷台を立起させる。
【００２２】
図２は，立起した荷台の平面図（図２（A））および側面図（図２（B））を示す。図示のように，荷台を立起させると，その状態で荷物の積載，荷おろしを，車両とは独立に行うことができる。
【００２３】
図３は，本発明の支持脚構造物1の斜視図を示す。支持脚構造物1は，図２に示されているように，通常は荷台の四箇所に組み付けられるが，荷台の使用目的などによりそれよりも多く，またはそれよりも少なく組み付けられてもよい。
【００２４】
支持構造物1を構成する支持脚2は，自立したときに荷台からの荷重に耐えるもので，また荷台を必要な高さに支持する長さをもつ。通常は，断面が矩形の中空構造となっている。
【００２５】
支持脚2の上端に，垂直に，図４においてよく示されているシャフト3が固定されている。シャフト3は，荷台を構成するフレーム4（図では破線で示す）の下側に取り付けられた支持体4に受け入れられている。以下で説明するように，支持脚2はシャフトを軸にして自立位置と，格納位置との間を回転できる。
【００２６】
図４はシャフト3の斜視図を示し，シャフト3は，支持脚2の先端に固定される円形部分10の先に，断面が矩形の第一の矩形部11を有する。第一の矩形部11上には，支持脚2とは反対方向に伸びる突起12が設けられている。この突起12は，以下で説明するように，支持脚を格納する際に，位置決めの働きをするばかりでなく，荷台からの荷重を支える働きも担う。
【００２７】
シャフト3は，第一の矩形部11に続いて，同軸に，断面が円形の第一の円筒部13，断面が第一の第一の矩形部11を同じ第二の矩形部14，断面が第一の円筒部13と同じ第二の円筒部15，さらに断面が第一の矩形部11と同じ第三の矩形部16を有する。
【００２８】
各円筒部の断面は，各矩形部の断面の内接円またはそれよりも小さい円の形をもつ。矩形部の断面の形状は，図では四角形状であるが，これに限定されず，シャフト3を軸線の回りに90°回転させたとき，回転させる前の形状と重なる形状，たとえば，八角形の形状であってもよい。ただし，より多角形になると，円形に近くなり，支持脚を自立位置，格納位置で確実に支持しにくくなる。
【００２９】
第一の円筒部13と第二の円筒部15とは同じ長さが望ましく，また第二の矩形部14と第三の矩形部16とは同じ長さが望ましい。第二の矩形部14の側面に，支持脚2の方向に対して垂直方向に凹部17が設けられている。この凹所17には，支持脚2が自立位置で固定するときの固定具7の先端が挿入される。
【００３０】
図５は，シャフト3を受け入れ，自立位置と格納位置とで支持する支持体5を示す。支持体5は，フレーム4の下に固定されるベース20を有する。このベース20の両端は上方に曲がり，さらに上面に複数の補助プレート21が固定されている。このように構成することでベース20の強度が増す。
【００３１】
このベース20の下面に一対の平行な外側プレート22および内側プレート23が垂直に固定され，それらの間が筐体24により連結されている（図５（C））。各プレート22，23は，剛性のある一枚のプレートから構成されてもよいが，これらプレートには荷台からの荷重が作用することから，たとえば，それぞれ二枚のプレートとから構成されてもよい。
【００３２】
各プレート22，23には，上記した，シャフトの第一，第二および第三の矩形部の断面と同じ形状の開口25および開口26（図面には示されていない）を有する。したがって，各矩形部が開口に位置すると，シャフトは，軸線のまわりに回転することができない。各開口25，26には，突起12と同じ形状の補助切り欠き部25’，26’（図示せず）が，それぞれ水平方向に形成されている。
【００３３】
支持脚2を鉛直に保持したまま，シャフト3の矩形部をプレート各開口に整合させると，シャフト3の第一の矩形部11上に設けられた突起12がプレート22と接触するまで，シャフト3は軸線方向内側に移動可能となる。ただし，シャフトの矩形部が，いずれかまたは両方のプレートの開口に位置しているときは，シャフトはその軸線のまわりで回転することができない。
【００３４】
前述したように，シャフト3には，断面が円形の第一および第二の円筒部14，16を有する。そしてその断面は，プレートの開口25，26の内接円またはそれよりも小さいものである。したがって，第一の円筒部13および第二の円筒部15が，外側プレート22および内側プレート23にそれぞれ位置できるように，プレートの間隔（または第一および第二の円筒部の長さ，それらの間隔（第二の矩形部の軸線方向の長さ））が決定されると，シャフト3はその軸線のまわりで回転することができる。
【００３５】
かくして，シャフト3を軸線方向内側に移動し，シャフト3の第一の矩形部11上に設けられた突起12がプレート22と接触する前には，第一の円筒部13および第二の円筒部15は，外側プレート22および内側プレート23にそれぞれ位置することができる。そこで，シャフト3をその軸線のまわりで回転させ，突起12を補助きり欠き部25’に整合させると（このとき，シャフト3に固定された支持脚2も回転する），さらにシャフト3を軸線方向に移動することができる。
【００３６】
支持体5の外側プレート22の近傍に固定具7が設けられている。固定具7は，内側に常に引っ張られるように，バイアスがかけられたロッド7aとその外側に設けられたリング7bとからなり，リング7bを引っ張ると，ロッド7aが外側に移動して，支持体5内にシャフト3に移動が可能となる。前述したように，シャフト3の第二の矩形部14には凹所17が設けらており，この凹所17にロッド7aを挿入すると，シャフト3が固定される。
【００３７】
本発明の支持脚構造物は，図２に示されているように着脱自在の荷台の側面に二つずつ対称に設けることが一般的であるが，荷台の用途等，また支持脚の格納位置を考慮して，個数，配置場所が決定されるものである。
【００３８】
操作
図６ないし図８を参照して，本発明の支持脚構造物の操作を説明する。
図６（A）に示されているように，支持脚2は格納位置（図８の破線を参照）に固定されている。このとき，図６（B）に示されているように，シャフト3は最も奥に押し入れられている。この位置では，シャフトの第一の矩形11は，内側プレート23に位置するために，シャフトは回転できない。図８（A）に示されているように，この状態で支持脚を固定するための，固定具7と同じ構造の固定具30が，支持脚の底部に設けられた凹所（図示せず）と整合するようにフレーム4に取り付けられている。この固定具30により，支持脚は，走行に支障がないように，格納位置に支持脚を固定する。シャフト3の円筒部分10に，固定具7のロッド7aが挿入できる凹所を設けることにより，固定具7もまた，支持脚を格納位置に固定できる。
【００３９】
固定具30（固定具7）の固定を解いて，シャフト3を外側に引き出す。第一の矩形部11，第二の矩形部14がプレート22，23の開口に位置するために，軸線のまわりで回転できない。さらに，シャフト3に第一および第二の円筒部13，15がプレート22，23の位置にくるまでシャフト3を引き出す。このとき，突起12は，プレート22より外に出ている（図６（D））。
【００４０】
ここで，シャフト3を，図７（A）に示されているように，鉛直となるまで，すなわち自立位置までシャフト3を回転する。このとき，突起12は水平方向から垂直方向に移動する。
【００４１】
さらに，図７（B）に示されているように，シャフト3を外側に移動させると，第二の矩形部14は，外側プレート22のところに，第三の矩形部16は内側プレート23のところに位置し，シャフト4の突起12は，荷台を構成するフレームに下から当接する。このとき，固定具7のロッド7aをシャフト3の第二の矩形部14の凹所17に挿入する。これにより，シャフト3は固定され，支持脚構造物は，荷台を立起させることができる（図８）。
【００４２】
このとき，荷台からの荷重は，シャフトとプレートとの接合部のみならず，突起とフレームとの接合部に分散される。これは支持脚とシャフトとの連結部の構造を簡素化できる。
【００４３】
上記操作を逆に行うことで，支持脚を格納位置に移動させ格納させることができる。
【００４４】
【効果】
上記説明したように，本発明の支持脚構造部により，荷台からの荷重が，シャフトとプレートとの接合部のみならず，突起とフレームとの接合部に分散され，これにより，支持脚とシャフトとの連結部の構造を簡素化することができる。
【００４５】
さらに，本発明にしたがって，支持体を構成するプレートの補助切り欠き部を設け，シャフトにこの切り欠き部と整合する突起を設けることのみで，先行技術の着脱式荷台の構成を実質的に変更を加えることなく，荷台からの荷重を分散支持することができる。
【図面の簡単な説明】
【図１】図１（A）は，本発明の支持脚構造物が組み込まれた着脱式荷台が車両に取り付けられた状態の部分拡大図であり，図１（B）は本発明の支持脚構造物が組み込まれた着脱式荷台が車両から取り外された状態の部分拡大図である。
【図２】図２（A）は，本発明の支持脚構造物が組み込まれた，立起した着脱式荷台の側面図であり，図２（B）は，本発明の支持脚構造物が組み込まれた，立起した着脱式荷台の平面図である。
【図３】図３は，本発明の支持脚構造物の斜視図である。
【図４】図４は，本発明の支持構造物のシャフトの斜視図である。
【図５】図５（A）は，本発明の支持構造物の支持体の平面図であり，
図５（B）は，本発明の支持構造物の支持体の正面図であり，
図５（C）は，本発明の支持構造物の支持体の側面図である。
【図６】図６（A）は，格納位置にある本発明の支持脚構造物の部分拡大正面図であり，
図６（B）は，格納位置にある本発明の支持脚構造物の部分拡大側面図であり，
図６（C）は，格納位置から，支持脚をシャフトとともに外側に引き出したときの，本発明の支持脚構造物の部分拡大正面図であり，
図６（D）は，格納位置から，支持脚をシャフトとともに外側に引き出したときの，本発明の支持脚構造物の部分拡大側面図である。
【図７】図７（A）は，自立位置まで，支持脚をシャフトとともに回転させたときの，本発明の支持脚構造物の部分拡大正面図であり，
図７（B）は，自立位置まで，支持脚をシャフトとともに回転させたときの，本発明の支持脚構造物の部分拡大側面図であり，
図７（C）は，荷台を立起した，本発明の支持脚構造物の部分拡大正面図であり，
図７（D）は，荷台を立起した，本発明の支持脚構造物の部分拡大側面図である。
【図８】図８（A）は，荷台を立起した，本発明の支持脚構造物の正面図であり，
図８（B）は，荷台を立起した，本発明の支持脚構造物の側面図である。
【符号の説明】
1 本発明の支持脚構造物
2 支持脚
3 シャフト
4 フレーム
5 支持体
7 固定具[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support leg structure for raising a cargo bed, and in particular, when a load bed removable from a vehicle is removed from the vehicle, the support leg is held in a self-supporting position and the cargo bed is attached to the vehicle. The present invention relates to a support leg structure that holds a support leg in a retracted position.
[0002]
[Prior art]
In addition to being integrated with the vehicle, there are also vehicles that are detachable from the vehicle. Such a detachable loading platform is fixed to the vehicle when the package is loaded and transported (see FIG. 1A). Also, the loading platform can be removed from the vehicle for various purposes. At this time, a plurality of support legs attached to the loading platform are arranged vertically (FIG. 1 (B)).
[0003]
As shown in FIG. 2, when the vehicle is moved, the loading platform is raised. In this state, the luggage can be taken out from the loading platform or further loaded.
[0004]
In such a detachable loading platform, when loading a load, for example, before the vehicle arrives, the loading platform is erected in advance as described above, and a predetermined load is loaded. It can be fixed and transported. Thus, the detachable carrier can effectively use the loading time of the luggage and the traveling time of the vehicle.
[0005]
Such a detachable loading platform must support the support legs in a self-supporting position in order to stand up when removed from the vehicle, and when attached to the vehicle, it will not interfere with the running of the vehicle. In order to do this, the support leg must be supported in the retracted position.
[0006]
In the prior art, in order to perform such support, a vertically extending shaft is provided at the upper end of the support leg, and the shaft has a first rectangular portion having a rectangular cross section, followed by a first cylinder having a circular cross section. A second rectangular portion having the same cross section as the first rectangular portion, followed by a second cylindrical portion having the same cross section as the first cylindrical portion. In order to support this shaft, two parallel plates are provided on the lower surface of the frame constituting the loading platform, and these plates are provided so that openings having the same cross-sectional shape as that of the rectangular portion of the shaft are aligned. ing.
[0007]
Since the rectangular portion of the shaft and the opening of the plate have the same shape (cross section), the shaft can be moved in the axial direction when the rectangular portion of the shaft is aligned with the opening. On the other hand, when the first and second cylindrical portions are respectively located on both plates, the shaft can rotate around the axis.
[0008]
In such a prior art support leg structure, in order to place the self-supporting support leg in the retracted state, the shaft is moved inward in the axial direction until the first and second cylindrical portions of the shaft are located on both plates, respectively. Rotate the shaft around the axis until the support legs attached to the shaft are horizontal, align the rectangular portion of the shaft with the plate opening, and move the shaft inward in the axial direction. In this state, since the shaft cannot rotate, it is maintained in a horizontal state, that is, a retracted state.
[0009]
In order for the support legs in the retracted state to be self-supporting, the shaft is moved axially outward until the first and second cylindrical parts of the shaft are respectively located on both plates, and the support legs attached to the shaft are Rotate the shaft around the axis until it is vertical, align the rectangular portion of the shaft with the plate opening, and move the shaft outward in the axial direction. In this state, since the shaft cannot rotate, it is maintained in a vertical state, that is, in a self-supporting state.
[0010]
[Problems to be solved by the invention]
The support legs are usually attached to the loading platform at four locations, but when in the self-supporting position, the load from the loading platform is concentrated on the shaft through the plate. For this reason, the joint between the shaft and the support leg and the joint between the plate and the frame must be rigid.
[0011]
However, in order to make the loading platform detachable, it is difficult to secure a space for the structure to ensure rigidity under the loading platform. Further, the members required for such a configuration increase the overall weight and cost.
[0012]
The present invention has been made to solve such a problem, and an object of the present invention is to provide a support leg structure for a detachable loading platform that can support the load from the loading platform in a distributed manner.
[0013]
Another object of the present invention is to provide a support leg structure for the detachable cargo bed having a simple configuration without substantially changing the configuration of the prior art detachable cargo bed.
[0014]
[Means for Solving the Problems]
A support leg structure for a detachable loading platform according to the present invention includes a frame constituting the loading platform, a support leg for raising the loading platform, a shaft vertically fixed to an upper end portion of the support leg, and the shaft. And a support fixed to the lower surface of the frame for receiving and supporting the support legs in a retracted position and a self-supporting position.
[0015]
The shaft is coaxial with a first rectangular portion having a rectangular cross section, a first cylindrical portion having a circular cross section, a second rectangular portion having the same cross section as the cross section of the first rectangular portion, and a first cylinder. A second cylindrical portion having the same cross section as the first portion.
[0016]
The first rectangular portion has a protrusion protruding in a direction opposite to the support leg, the cylindrical portion has an inscribed circle of a cross section of the rectangular portion or a smaller circular cross section, and the support is a lower surface of the loading platform. Each having a parallel outer plate and an inner plate fixed thereto. Each plate is aligned with each other to allow axial movement of the shaft, and has an opening of approximately the same shape as the cross section of the rectangular portion, and the opening is further provided with an auxiliary notch having the same shape as the protrusion in the horizontal direction. Have.
[0017]
Due to the axial movement of the shaft, when the first cylindrical part is located on the outer plate, the second cylindrical part is located on the inner plate and the shaft can be rotated between the retracted position and the free-standing position. Become.
[0018]
For raising the loading platform, when the shaft is moved outward in the axial direction with the projections and auxiliary notches aligned, and each cylindrical part is positioned on each plate, the shaft is moved from the retracted position to the self-supporting position. The shaft is further moved outward in the axial direction, the second rectangular portion is positioned on the outer plate, and the protrusion is joined to the frame. The protrusions can be joined to the frame to disperse the load from the loading platform.
[0019]
Here, the shaft may further include a third rectangular portion having the same cross section as the first rectangular portion at the tip of the second cylindrical portion. The length of the first cylindrical part and the length of the second cylindrical part are preferably approximately equal, and when the second rectangular part is located on the outer plate, the third rectangular part is preferably located on the inner plate. .
[0020]
The support structure preferably further includes a shaft stopper for fixing the shaft when the support leg is in a self-supporting position and the protrusion is joined to the frame. Further, the support structure preferably has a support leg stopper for fixing the support leg when the support leg is in the retracted position.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a partially enlarged view showing a loading platform incorporating the support leg structure of the present invention attached to a vehicle and removed from the vehicle. As shown in Fig. 1 (A), when the loading platform is attached to the vehicle, the support legs are stored so that there is no hindrance to travel, and as shown in Fig. 1 (B). , When the loading platform is removed from the vehicle, the support legs are self-supporting and raise the loading platform.
[0022]
FIG. 2 shows a plan view (FIG. 2 (A)) and a side view (FIG. 2 (B)) of the raised carrier. As shown in the figure, when the loading platform is raised, the loading and unloading of the luggage can be performed independently of the vehicle.
[0023]
FIG. 3 shows a perspective view of the support leg structure 1 of the present invention. As shown in FIG. 2, the support leg structure 1 is usually assembled at four locations on the loading platform, but may be assembled more or less depending on the purpose of use of the loading platform.
[0024]
The support legs 2 constituting the support structure 1 can withstand the load from the loading platform when it is self-supporting, and have a length that supports the loading platform at a required height. Usually, it has a hollow structure with a rectangular cross section.
[0025]
A shaft 3 that is well shown in FIG. 4 is fixed to the upper end of the support leg 2 vertically. The shaft 3 is received by a support body 4 attached to the lower side of a frame 4 (shown by a broken line in the figure) constituting the loading platform. As will be described below, the support leg 2 can rotate between a self-supporting position and a retracted position about the shaft.
[0026]
FIG. 4 is a perspective view of the shaft 3, and the shaft 3 has a first rectangular portion 11 having a rectangular cross section at the tip of the circular portion 10 fixed to the tip of the support leg 2. On the first rectangular portion 11, a protrusion 12 extending in the direction opposite to the support leg 2 is provided. As will be described below, the protrusion 12 not only functions as positioning when the support leg is retracted, but also functions to support the load from the loading platform.
[0027]
The shaft 3 is coaxially following the first rectangular portion 11, the first cylindrical portion 13 having a circular cross section, the first rectangular portion 11 having the same cross section as the second rectangular portion 14 having the same cross section. The second cylindrical portion 15 is the same as the first cylindrical portion 13, and the third rectangular portion 16 is the same as the first rectangular portion 11 in cross section.
[0028]
The cross section of each cylindrical part has the shape of an inscribed circle of the cross section of each rectangular part or a smaller circle. The cross-sectional shape of the rectangular portion is a quadrangular shape in the figure, but is not limited to this. When the shaft 3 is rotated 90 ° around the axis, the shape overlaps with the shape before the rotation, for example, an octagonal shape. It may be a shape. However, when it becomes more polygonal, it becomes closer to a circle and it is difficult to reliably support the support legs in the self-supporting position and the retracted position.
[0029]
The first cylindrical portion 13 and the second cylindrical portion 15 are desirably the same length, and the second rectangular portion 14 and the third rectangular portion 16 are desirably the same length. A concave portion 17 is provided on the side surface of the second rectangular portion 14 in a direction perpendicular to the direction of the support leg 2. The tip of the fixing tool 7 when the support leg 2 is fixed in the self-supporting position is inserted into the recess 17.
[0030]
FIG. 5 shows a support 5 that receives the shaft 3 and supports it in a self-supporting position and a retracted position. The support 5 has a base 20 fixed under the frame 4. Both ends of the base 20 are bent upward, and a plurality of auxiliary plates 21 are fixed to the upper surface. With this configuration, the strength of the base 20 is increased.
[0031]
A pair of parallel outer plate 22 and inner plate 23 are fixed vertically to the lower surface of the base 20 and connected between them by a casing 24 (FIG. 5C). Each of the plates 22 and 23 may be composed of a single rigid plate, but since these plates are subjected to a load from the loading platform, for example, each plate may be composed of two plates. .
[0032]
Each of the plates 22 and 23 has an opening 25 and an opening 26 (not shown in the drawing) having the same shape as the cross sections of the first, second and third rectangular portions of the shaft described above. Therefore, when each rectangular part is located in the opening, the shaft cannot rotate around the axis. In each of the openings 25 and 26, auxiliary notches 25 ′ and 26 ′ (not shown) having the same shape as the protrusion 12 are formed in the horizontal direction.
[0033]
When the rectangular portion of the shaft 3 is aligned with each plate opening while the support leg 2 is held vertically, the shaft 3 is moved until the protrusion 12 provided on the first rectangular portion 11 of the shaft 3 contacts the plate 22. Can move inward in the axial direction. However, when the rectangular part of the shaft is located at the opening of either or both plates, the shaft cannot rotate about its axis.
[0034]
As described above, the shaft 3 has the first and second cylindrical portions 14 and 16 having a circular cross section. The cross section is the inscribed circle of the openings 25 and 26 of the plate or smaller. Therefore, the spacing between the plates (or the length of the first and second cylinders, their length so that the first cylinder 13 and the second cylinder 15 can be positioned on the outer plate 22 and the inner plate 23, respectively. When the interval (the length of the second rectangular portion in the axial direction) is determined, the shaft 3 can rotate around that axis.
[0035]
Thus, the first cylindrical portion 13 and the second cylindrical portion are moved before the projection 12 provided on the first rectangular portion 11 of the shaft 3 contacts the plate 22 by moving the shaft 3 inward in the axial direction. 15 can be located on the outer plate 22 and the inner plate 23, respectively. Therefore, when the shaft 3 is rotated around its axis and the protrusion 12 is aligned with the auxiliary notch 25 '(at this time, the support leg 2 fixed to the shaft 3 also rotates), the shaft 3 is further rotated in the axial direction. Can be moved to.
[0036]
A fixture 7 is provided in the vicinity of the outer plate 22 of the support 5. The fixing tool 7 is composed of a rod 7a biased so as to be always pulled inward and a ring 7b provided on the outer side thereof. When the ring 7b is pulled, the rod 7a moves outward to support the support 7 It is possible to move the shaft 3 within 5. As described above, the recess 17 is provided in the second rectangular portion 14 of the shaft 3, and when the rod 7a is inserted into the recess 17, the shaft 3 is fixed.
[0037]
As shown in FIG. 2, the support leg structure of the present invention is generally provided symmetrically on the side surface of the detachable loading platform, but the usage of the loading platform, etc. The number and location are determined in consideration of the above.
[0038]
Operation The operation of the support leg structure of the present invention will be described with reference to FIGS.
As shown in FIG. 6A, the support leg 2 is fixed at the retracted position (see the broken line in FIG. 8). At this time, as shown in FIG. 6B, the shaft 3 is pushed in the farthest. In this position, the shaft cannot rotate because the first rectangle 11 of the shaft is located on the inner plate 23. As shown in FIG. 8 (A), a fixture 30 having the same structure as the fixture 7 for fixing the support leg in this state is provided in a recess (not shown) provided at the bottom of the support leg. ) Is attached to the frame 4 to align. With this fixing tool 30, the support leg is fixed to the retracted position so that there is no hindrance to travel. By providing the cylindrical portion 10 of the shaft 3 with a recess into which the rod 7a of the fixture 7 can be inserted, the fixture 7 can also fix the support leg in the retracted position.
[0039]
Unfasten the fixing tool 30 (fixing tool 7) and pull the shaft 3 outward. Since the first rectangular portion 11 and the second rectangular portion 14 are located at the openings of the plates 22 and 23, they cannot rotate around the axis. Further, the shaft 3 is pulled out until the first and second cylindrical portions 13 and 15 reach the positions of the plates 22 and 23 on the shaft 3. At this time, the protrusion 12 protrudes from the plate 22 (FIG. 6D).
[0040]
Here, as shown in FIG. 7A, the shaft 3 is rotated until it becomes vertical, that is, to a self-supporting position. At this time, the protrusion 12 moves from the horizontal direction to the vertical direction.
[0041]
Further, as shown in FIG. 7B, when the shaft 3 is moved to the outside, the second rectangular portion 14 is located at the outer plate 22, and the third rectangular portion 16 is disposed at the inner plate 23. The projection 12 of the shaft 4 is in contact with the frame constituting the loading platform from below. At this time, the rod 7a of the fixture 7 is inserted into the recess 17 of the second rectangular portion 14 of the shaft 3. Thereby, the shaft 3 is fixed, and the support leg structure can raise the loading platform (FIG. 8).
[0042]
At this time, the load from the carrier is distributed not only at the joint between the shaft and the plate but also at the joint between the projection and the frame. This can simplify the structure of the connecting portion between the support leg and the shaft.
[0043]
By performing the above operation in reverse, the support leg can be moved to the storage position and stored.
[0044]
【effect】
As described above, with the support leg structure of the present invention, the load from the loading platform is distributed not only at the joint between the shaft and the plate, but also at the joint between the protrusion and the frame. The structure of the connecting part can be simplified.
[0045]
Furthermore, according to the present invention, the configuration of the prior art detachable loading platform is substantially changed only by providing an auxiliary notch portion of the plate constituting the support and providing the shaft with a protrusion aligned with the notch portion. The load from the loading platform can be dispersedly supported without adding.
[Brief description of the drawings]
FIG. 1 (A) is a partially enlarged view of a state in which a detachable cargo bed incorporating a support leg structure of the present invention is attached to a vehicle, and FIG. 1 (B) is a support leg of the present invention. It is the elements on larger scale of the state where the detachable loading platform in which the structure was built was removed from the vehicle.
FIG. 2 (A) is a side view of an upright detachable loading platform in which the support leg structure of the present invention is incorporated, and FIG. 2 (B) is a view of the support leg structure of the present invention. It is a top view of the detachable loading platform which was built up and stood up.
FIG. 3 is a perspective view of the support leg structure of the present invention.
FIG. 4 is a perspective view of the shaft of the support structure of the present invention.
FIG. 5 (A) is a plan view of a support of the support structure of the present invention,
FIG. 5 (B) is a front view of the support of the support structure of the present invention,
FIG.5 (C) is a side view of the support body of the support structure of this invention.
FIG. 6 (A) is a partially enlarged front view of the support leg structure of the present invention in the retracted position;
FIG. 6B is a partially enlarged side view of the support leg structure of the present invention in the retracted position,
FIG. 6C is a partially enlarged front view of the support leg structure of the present invention when the support leg is pulled out together with the shaft from the retracted position.
FIG. 6D is a partially enlarged side view of the support leg structure of the present invention when the support leg is pulled out together with the shaft from the storage position.
FIG. 7 (A) is a partially enlarged front view of the support leg structure of the present invention when the support leg is rotated together with the shaft to the self-supporting position;
FIG. 7B is a partially enlarged side view of the support leg structure of the present invention when the support leg is rotated together with the shaft to the self-supporting position;
FIG. 7 (C) is a partially enlarged front view of the support leg structure of the present invention with the cargo bed raised.
FIG. 7 (D) is a partially enlarged side view of the support leg structure of the present invention with the cargo bed raised.
FIG. 8 (A) is a front view of the support leg structure of the present invention with the cargo bed raised,
FIG. 8B is a side view of the support leg structure of the present invention in which the cargo bed is raised.
[Explanation of symbols]
1 Supporting leg structure of the present invention
2 Support legs
3 shaft
4 frames
5 Support
7 Fixing tool

Claims

A support leg structure for a detachable loading platform,
A frame that constitutes the loading platform; a support leg for raising the loading platform; a shaft that is vertically fixed to an upper end portion of the supporting leg; And a support fixed to the lower surface of the frame.
The shaft includes a first rectangular portion having a rectangular cross section, a first cylindrical portion having a circular cross section, a second rectangular portion having the same cross section as the cross section of the first rectangular portion, and the first shaft A second cylindrical portion having the same cross section as the first cylindrical portion,
The first rectangular portion has a protrusion protruding in a direction opposite to the support leg;
The cylindrical portion has an inscribed circle of a cross section of the rectangular portion or a cross section of a smaller circle,
The support has a parallel outer plate and an inner plate fixed to the lower surface of the loading platform, respectively.
The plates are aligned in order to allow axial movement of the shaft and have openings of substantially the same shape as the cross section of the rectangular portion;
The opening further has an auxiliary notch having the same shape as the protrusion in the horizontal direction,
When the first cylindrical portion is positioned on the outer plate by the axial movement of the shaft, the second cylindrical portion is positioned on the inner plate, and the shaft is in the retracted position and the self-supporting position. Can rotate between
When the shafts are moved outward in the axial direction with the protrusions and the auxiliary notches aligned with each other for raising the loading platform, the shafts are positioned on the plates. And rotating the shaft from the retracted position to the self-supporting position, further moving the shaft outward in the axial direction to position the second rectangular portion on the outer plate, and joining the protrusion to the frame,
A support leg structure characterized by that.

The support leg structure according to claim 1,
The shaft further includes a third rectangular portion having the same cross section as the first rectangular portion at the tip of the second cylindrical portion,
The length of the first cylindrical portion is substantially equal to the length of the second cylindrical portion,
The support leg structure, wherein when the second rectangular portion is positioned on the outer plate, the third rectangular portion is positioned on the inner plate.

A support leg structure according to claim 1 or 2,
The support leg structure according to claim 1, further comprising a shaft stopper for fixing the shaft when the support leg is in a self-supporting position and the protrusion is joined to the frame.

The support leg structure according to any one of claims 1 to 3, further comprising a support leg stopper for fixing the support leg when the support leg is in a retracted position.