201040057 '六、發明說明： 【發明所屬之技術領域】 本發明係有關一種用於搬運物品的推車，更詳言之， 係有關能以自立狀態收存的推車。 【先前技術】 習知’使用於搬運物品的推車，為了在被收存時或車 輛搬運時盡量少佔空間，並且即使在維持自立狀態時也能 〇折疊而構成，例如本申請人發明之推車（參照專利文獻^。 該推車，為了藉由辅助腳輪以前傾姿勢支承折疊载物 。後而自立的推車’使為了承載貨物而特意製作之作為載 物台的底板可位於折疊後的推車之靠前的位置，使自立的 推車之之重心盡可能位於前方。 ^依此，在折疊推車時，與將作為載物台的底板向推車 後側、亦即向背框構件側折疊成立起狀態之習知多數人所 習慣的折疊方法不同，由於將底板向推車之左右側框構件 的側折疊成立起狀態，因此因此在折疊該推車時，人們 往往非常困惑，導致作業無法順暢進行而進展緩慢。 [專利文獻1]日本專利3927220號公報（第i〜9頁， 圖1〜12 ) 【發明内容】 本發明’提供一種推車，能極力減少以前傾姿勢自立 子的推車在收存時向後侧翻倒的危險性可使該推車之 3 201040057 之作為载物台之 的折疊方向相同的二=疊方向成為與習知推車之之底板 為解決上述問ΓΓ進行折叠。 載物台、配置於推車前後=推車’設置有承栽貨物的 車㈣時用的輔助腳輪，：:二動:：主腳輪、… 疊…側主腳輪可向後 :腳輪方向折 :後側主腳輪方向折疊、前側心=主=物台 動，使輔助腳輪士 A v, 腳輪内後側主腳輪方向移 後側主腳輪方向二貝主腳輪更向前突出；當該載物台向 時，該前側主腳：;至:二::輪向後側主腳輪方向移動 方突出；錢物台折疊而推腳輪比後側主腳輪更向後 方傾斜時，可萨由Η 自立的狀態下’該推車向後 前側主腳輪來保持自立。丨㈣輪更向後方突出的至少-個 件二物台由底板構件、左右側框構件以及背框構 構二:構件能向背框構件内側折叠，又，左右側框 構件亦此分別向背框構件内側折疊。 二前侧主腳輪係與該左右側框構件各自的 同步移動。 '又’當該左右側框構件向背框構件内側折疊時，能折 疊成位於向背框構件内側折疊後之底板構件前方。 又’當將該載物台折疊而自立之推車重疊擺放時，使 比後側主腳輪更向後方突出之前側主腳輪能進入到重疊擺 放之後側推車之折疊後的載物台下方。 根據本發明之推車，該推車係使載物台向後側主腳輪 201040057 方向折疊，且使推車前側所具有的主腳輪移動到後側主脚 輪附近，藉此使前側主腳輪中至少—個主腳輪比後側主聊 輪更向後方突出，且藉由前側主 网粉的移動，輔助腳輪比 該移動後之前側主腳輪更向前方突出。 因此’使作為載物台之庙把μk息丄 口之底板的折疊方向成為能像習妒 人們所習慣之向推車後側折疊的方向，即使在折叠了載物 台的推車自立的狀態下該推車之重心比以前更向後方務 Ο 〇 動，推車向後側翻倒的可能性增大的情況下，如上所述， 在折疊推車而形成自立狀態時，由於前側主腳輪甲至少一 個主腳輪位於比後側主腳輪更向後方突出的位置，因此即 使在自立的推車向後方傾斜的情況下，亦能藉由比後側主 腳輪更向後方突出之前側主腳輪中至少一個主腳輪來保持 自立，可防止向後方傾斜的推車翻倒。 、 又’該輔助腳輪從該推車前方支承因載物台折#而重 心偏向前方自立的推車，因此可藉由該辅助腳輪來防 車向前方翻倒。 又，在具有即使稍稍被碰觸自立穩定狀態易於破壞而 翻倒的可能性之輕量化的推車例如以樹脂材料製成推車之 載物台的情況下，比後側主腳輪更向後方突出之前側主腳 輪中至少一個主腳輪亦能防止推車向後方翻倒又，藉由 該輔助腳輪能防止推車向前方翻倒，因此可使該輕量化的 推車安全地自立。 進而，當重疊擺放多台折疊了載物台而自立的推車 時，比後側主腳輪更向後方突出之前側主腳輪能進入到重 5 201040057 疊擺放後側的推車之折疊的載物台下 無間隙地重疊擺放，並且可筆直地向前 2該推車可 在收存或搬運推車時不會浪費空間。 擺放，因此 【實施方式】 以下根據附圖，對本發明之推車進行說明。 〔實施例1〕 ° 圖1和圖2表示本發明之推車， 诉平並且係表示該推車之 折疊狀態的立體圖。圖1表示從 ^ 衣不從成為推車後側的背框5側 觀察的狀態，而圖2表示從成為推直义 风马推車則側之折疊後的左右 側框（側框3、側框4)側觀察的狀態。 推車1由下述構件構成：底妬 展板2構件、左右側框（側 框3、側框4 )構件、背框5構件 僻ί卞作马移動用車輪的前後 主腳輪（前側主腳輪7、後側φ娜认0、 便側主腳輪8)、用於使折疊後的 推車1安全地自立的輔助腳輪1〇(參照圖2)。 根據圖1及圖2,在抽Φ ,, 在推車1折疊後的狀態下，作為載物 台之底板2位於立起於背框5前側的狀態而折疊的位置， :框4位於向立起於背μ 5前側的狀態下而折疊之底板2 別側折疊的位置’側框3位於向側框4前側折疊的位置。 又’在設置於上述推車1的底板2上方之用於防止貨 物倒塌的各框構件（側框3、側框4、背框5)，在背框5 的兩側藉由連結件6分別可自由弯折地連結側框3和側框 4 ’該連結件6的背框5側係與該背框5固定，而在側框3 # #!框4 #1 ’由於該等側框3和側框4貫通於連結件6内， 201040057 因此側框3和侧框4可自由轉動。 又，作為移動用車輪的前诒± 刃剛後主腳輪分別設置於推車 的前後左右，該主腳輪之前伽士伽认， 询心刖側主腳輪7的一個固定於側框 構件的前端，另一個固定於相，丨括4 心％側框4構件的前端，又，後側 主腳輪8固定於背框5構件的左右兩側。201040057 'VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a cart for carrying articles, and more particularly to a cart that can be stored in a self-standing state. [Prior Art] Conventionally, a cart for carrying articles is configured to be as small as possible when stored or when the vehicle is transported, and can be folded even when the self-supporting state is maintained, for example, the applicant's invention Cart (refer to the patent document ^. The cart, in order to support the folding load by the auxiliary caster in the forward tilting posture. The self-erecting cart" allows the bottom plate which is specially made as a stage for carrying the goods to be located after folding The front position of the cart makes the center of gravity of the self-standing cart as far as possible. ^ Accordingly, when folding the cart, the bottom plate that will serve as the stage is directed to the rear side of the cart, that is, to the back frame. Conventional folding of the member side is common. The folding method that most people are accustomed to is different. Since the bottom plate is folded toward the side of the left and right side frame members of the cart, the folding cart is often confused. [Patent Document 1] Japanese Patent No. 3927220 (pages i to 9, FIG. 1 to 12) [Invention] The present invention provides a cart. The risk that the stroller can be reduced to the rear side during storage can be reduced as much as possible. The bottom plate of the car is folded to solve the above problem. The stage is arranged before and after the cart = the cart is equipped with the auxiliary casters for the vehicle (4) carrying the goods, :: two movements: main casters, ... ...the side main casters can be turned backwards: the casters are folded in direction: the rear side main casters are folded, the front side heart = main = object table movement, the auxiliary casters A v, the rear side main casters in the casters are moved to the rear side main casters direction two shells The caster protrudes further forward; when the stage is facing, the front main foot:; to: 2:: the wheel moves toward the rear main caster; the money platform is folded and the pusher is more rearward than the rear main caster When tilting, Kosa is self-supporting in the self-supporting state. The cart is self-supporting to the rear front main caster. At least one of the two (four) wheels protrudes rearward from the bottom plate member, the left and right side frame members, and the back frame structure. Two: the member can be folded to the inside of the back frame member, and The left and right side frame members are also respectively folded toward the inner side of the back frame member. The two front side main casters and the left and right side frame members are moved in synchronization with each other. 'And' when the left and right side frame members are folded inside the back frame member, they can be folded into The front side of the bottom member is folded to the inside of the back frame member. Further, when the cart is folded and the self-standing carts are placed one on top of the other, the front main casters are protruded further rearward than the rear main casters. The cart is folded under the stage of the rear side cart. According to the cart of the present invention, the cart is folded in the direction of the rear main caster 201040057, and the main caster on the front side of the cart is moved to the rear side. Near the main caster, at least one of the front main casters protrudes rearward from the rear main caster, and the auxiliary caster is more oriented than the front main caster by the movement of the front main mesh Prominent in front. Therefore, the folding direction of the bottom plate of the μk is the direction in which the folding of the bottom of the cart can be folded, even in the state in which the stroller of the stage is folded. The center of gravity of the cart is more backward than before, and the possibility of the cart tilting backwards is increased. As described above, when the cart is folded and formed in a self-standing state, the front main caster is At least one of the main casters is located further rearward than the rear main casters, so that at least one of the front side main casters can be protruded rearward by the rear side main casters even when the self-standing cart is tilted rearward. The main casters are kept self-standing to prevent the cart tilted backwards from tipping over. Further, the auxiliary caster supports the cart that is biased toward the front by the stage folding # from the front of the cart, so that the auxiliary caster can prevent the vehicle from tipping over. Moreover, in the case of a cart having a weight that is likely to fall over even when it is slightly touched by the self-sustaining state, it is more backward than the rear main caster, for example, when the cart is made of a resin material. Protruding at least one of the front side casters also prevents the cart from tipping over, and the auxiliary caster prevents the cart from tipping over, thereby allowing the lightweight cart to be safely self-standing. Further, when a plurality of carts that are folded and folded by the stage are placed in an overlapping manner, the front side main casters protrude more rearward than the rear side main casters, and the front side main casters can enter the folding of the rear side of the cart. The stage is placed without overlap under the gap, and can be straight forward 2 The cart can not waste space when storing or transporting the cart. [Embodiment] Hereinafter, a cart of the present invention will be described with reference to the drawings. [Embodiment 1] Fig. 1 and Fig. 2 show a stroller of the present invention, which is a flat view and shows a folded view of the stroller. Fig. 1 shows a state in which the garment is not viewed from the side of the back frame 5 on the rear side of the cart, and Fig. 2 shows the left and right side frames (side frame 3, side) which are folded from the side of the push-pull horse cart. Box 4) Status observed on the side. The cart 1 is composed of the following members: a bottom stencil 2 member, left and right side frames (side frame 3, side frame 4) members, and a back frame 5 member. The front and rear main casters (front side main casters 7) The rear side is 0, the side main caster 8), and the auxiliary caster 1 for securing the folded cart 1 is self-standing (see Fig. 2). According to FIG. 1 and FIG. 2, in the state where the cockerel 1 is folded, the bottom plate 2 as the stage is folded in a state of standing on the front side of the back frame 5, and the frame 4 is located at the front. The position at which the bottom plate 2 folded in the state of the front side of the back μ 5 is folded, and the side frame 3 is located at a position folded toward the front side of the side frame 4. Further, each of the frame members (the side frame 3, the side frame 4, and the back frame 5) for preventing the goods from collapsing above the bottom plate 2 of the above-described cart 1 is respectively connected to the both sides of the back frame 5 by the connecting members 6 The side frame 3 and the side frame 4 ' can be freely bent and joined. The side of the back frame 5 of the connecting member 6 is fixed to the back frame 5, and the side frame 3 # #! frame 4 #1 ' is due to the side frame 3 And the side frame 4 penetrates through the connecting member 6, and 201040057, therefore, the side frame 3 and the side frame 4 are freely rotatable. Further, as the front wheel of the moving wheel, the main caster is disposed on the front, rear, left and right of the cart, and the main caster is preceded by the gaze, and one of the main casters 7 is fixed to the front end of the side frame member. The other is fixed to the front end, including the front end of the 4%% side frame 4 member, and the rear main caster 8 is fixed to the left and right sides of the back frame 5 member.
又’如上所述’作為载物台之底板2以立起於背框$ 前側的狀態折疊，側框4向立起於^ 5前側的狀態下而 折疊之底板2前側折疊，側框3向側框4前側折疊，藉此， 如圖1所示，設置在側框4之前側主腳輪7位於比設於背 框5之後側主腳輪8更向後方突起的位置，又，如圖2所 示，輔助腳輪1〇呈向前方突出的狀態。 因此，如側面觀察折疊後的推車丨之圖3所示，該前 側主腳輪7比設於背框5之後側主腳輪8更向後方突出， 且輔助腳輪10向前方突出。 在前後主腳輪（前側主腳輪7、後側主腳輪8)接觸於 地面12的狀態下，如圖3中的右圖所示’該輔助腳輪1〇 設置成與地面12之間具有少許間隙。 又，根據表示該折疊後的推車丨收存時之狀態的圖 4⑷，該推車i以後側主腳輪8為轴，向前方的輔助腳輪ι〇 側傾斜，藉由輔助腳輪10以前傾姿勢而支承自立，又，該 推車1重心移向該輔助腳輪10側，成為難以倒向後方的穩 定狀態。 ~ 又，上述傾斜的角度，係由辅助腳輪1〇的突出長度、 該辅助腳輪10在推車丨的使用狀態下設於主腳輪稍微上方 7 201040057 的高度所決定，該輔助腳輪10的突出量，係由各框構件（側 框3、側框4、背框5)的高度、底板2的左右方向的長度 所決定。 又，對於圖4(a)所示之重心移向輔助腳輪丨〇側而處於 難以倒向後方的穩定狀態的推車丨，施加向該圖4(a)中所示 箭頭方向的力，㈣i的重心向後方移動，如圖_所示， 推車1的輔助腳輪1〇從地面12抬起，該推車丨向後方傾 斜，即使在該情況下，位於比料i之後側主腳輪8更向 後方突出的位置之前側主腳輪7著地，防止該推車（向後 方翻倒。 更向後方突出之前侧主腳輪 又，在比後側主腳輪 (在本實施例的推車i中設置於側框4)，使安裳有該前側 主:輪7之具有段差的支承件以之下段的上表面（參照圖 9⑽位於比推車丨的載物台的下表面靠下方的位置，因 :的當重疊擺放折叠後的推車1時’重疊擺 放的刚方的推車之前側主腳輪7(本 於側框4)盥安梦右呤作早I中5又置 /、女裝有S玄則側主腳輪7之具有段差的支承件 :下方下Μ位進入重疊擺放的後方的折疊後的推車之載物 口下方，如圖6所示，當重疊擺放多台推車 該等推車無間隙地重叠擺放。 、也了將 支承件2a的上段部分係用於支承作為巷物a 板2之支承部。 又5忭馮戴物台之底 又，在輔助腳輪10，如圖 輪10的支…形成為前端較細，並二裝:該輔助腳 且又承臂9的形狀為 201040057 截面呈倒u字形構件（圖示省略）或倒[字形構件（圖亍 省略）’藉此，如目5所示，當重疊擺放折疊後的推車！ 時’重疊擺放的後方的推車之支承臂9以嵌套方式收納於 前方的重疊擺放的推車之支承臂9内（參照圖8)，在重愚 擺放時不會帶來阻礙。 ι 虽辅助腳輪10的突出長度較大時 〇 〇 照圖7、8)，可將支承臂9收納於前方的重疊擺放的推: 之支承臂9内’但也可使支承臂”列如從其根部向斜前方 二出，使重疊擺放的後方的推車之支承臂9避開前方的重 且擺放的推車之支承臂9’此情況未在實施例的圖中表示。 在該主腳輪（别側主腳輪7、後側主腳輪 件的安裝’可將該主㈣直接安裝於各框構件的 二亦可經由某構件進行安裝的間接安裝，根據該安裝之 固疋可採用螺釘等固定件，亦可藉由焊接而固定。 a又主腳輪（別側主腳輪7、後側主腳輪$ ) 一部 腳輪7)採用帶有制動件的腳輪，又，所有的輪 要部=萬Γ行進方向的萬向腳輪，或者前後左右之所 為萬向腳輪，而其他的腳輪為固定腳輪。 〔實施例2〕 圖9為圖1 4)構件和背框 構件構成的另一 作圖。 、圖2所示推車之左右側框（側框3、側框 ;構件由板（側板3a、側板4a、背板⑷ 實施例，並且係表示推車之折疊動作的動 在該圖9所示 之推車1之底板2上方設 置之用於防止 9 201040057 貨物倒塌的各板構件，在背板53兩側藉由連結件&分別可 自由彎折地連結側板以和側板4a，該連結件6之背板^ 側係與該背板5a固定’而側板3a和側板^側透過連結件 以的鉸鏈6b連結，因此’該等侧板3a和側板4&藉由該较 鏈6b可自由轉動。 又，作為推車1之移動用車輪之前後主腳輪分別設置 :推車1的前後左右，該主腳輪中前側主腳輪7的一個固 疋於側板3a構件的前端，另—個固定於側板^構件的前 端，又，後側主腳輪8固定於背板5a構件的左右兩側。 又，圖9所不之推車丨的折疊動作與圖丨、圖2所示之 推車折疊動作相同。根據該圖9對該圖9之推4 i的折疊 動作進行說明。 圖9(a)表示使用狀態的推車丨，從該狀態開始，首先使 作為載物台之底板2立起於背板化側，藉由背板化所具有 的固定件（圖示省略）固定該底板2(參照圖9(b))。 接著，將側板4a向立起於背板5a前側的底板2前側折 疊（參照圖9(c)) ’最後，將側板3a向側板4&前側折疊（參 照圖9(d))，藉此，可將該推車丨折疊起來。 然後，如圖9(c)所示，藉由將側板4a向立起於背板& 别側的底板2前側折#，固$於側板4a前端之前側主腳輪 7與圖1所示之推車同樣，位於比固定於背板5a左右兩側 之後側主腳輪8更向後方突出的位置。 又如圖9(d)所示，藉由將側板3a向側板4a前側折疊， 隱藏於側板3a下方的輔助腳輪1〇與圖2所示之推車同樣， 201040057 呈向前方突出的狀態。 實施例i之圖中的標號η係與支承臂9連接之輔助腳 係用於支承作為 輪1 〇的支柱，實施例2之圖中的標號2b 載物台之底板2的底板托架。 又，相較於習知的推車之各腳給A t〇 #叫輪在折疊後呈平行狀 態’由於本實施例之推車構成為前側* _认+ r J⑴训主腳輪中至少一個主 腳輪比後側主腳輪更向後方突出，因& , ^ 口此，在將一個側框向 背框侧折疊後，在折疊另一個側框時， Ο 4 TU呷，兩個後側主腳輪8 和之前折疊的側框側的主腳輪7著地，可防止該推車1向 後方翻倒，因此可安心地折疊推車i。 【圖式簡單說明】 圖1係表示本發明之推車之實施例的立體圖。 圖2係表示圖丨所示之推車之相反側的立體圖。 圖3係折疊後的推車之側視圖。 圖4(a)、（b)係表示收存時的狀態之推車之側視圖。 圖5係表示兩台推車重疊擺放狀態的侧視圖。 圖6係表示多台推車重疊擺放狀態的側視圖。 圖7係表示推車之實施例的立體圖。 圖8係表示推車重疊擺放時輔助腳輪部分的狀態之局 部截面圖。 圖 （）（d)係表示推車之另一實施例並表示折疊動作 的立體圖。 11 201040057 【主要元件符號說明】 1 推車 2 底板 2a 支承件 2b 底板托架 3 側框 3a 側板 4 側框 4a 側板 5 背框 5 a 背板 6 連結件 6a 連結件 6b 鉸鍵 7 前側主腳輪 8 後側主腳輪 9 支承臂 10 輔助腳輪 11 支柱 12 地面 12Further, as described above, the bottom plate 2 as the stage is folded in a state of being erected on the front side of the back frame $, and the side frame 4 is folded toward the front side of the bottom plate 2, and the front side frame 3 is folded. The front side of the side frame 4 is folded, whereby, as shown in FIG. 1, the front side main caster 7 is disposed at a position further protruding rearward than the main side caster 8 provided on the rear side of the back frame 5, and, as shown in FIG. It is shown that the auxiliary caster 1 〇 is in a state of protruding forward. Therefore, as shown in Fig. 3 in which the folded stroller is viewed from the side, the front side main caster 7 protrudes rearward than the rear main caster 8 provided on the back frame 5, and the auxiliary caster 10 projects forward. In the state where the front and rear main casters (the front main caster 7, the rear main caster 8) are in contact with the floor 12, as shown in the right diagram of Fig. 3, the auxiliary caster 1 is disposed with a slight gap with the ground 12. Further, according to Fig. 4 (4) showing the state at the time of folding the stroller, the rear main caster 8 of the cart i is an axis, and is tilted toward the front auxiliary caster ι side, by the auxiliary caster 10 leaning forward. Further, the support is self-supporting, and the center of gravity of the cart 1 is moved toward the side of the auxiliary caster 10, which becomes a stable state in which it is difficult to fall backward. Further, the angle of the inclination is determined by the protruding length of the auxiliary caster 1〇 and the height of the auxiliary caster 10 which is provided slightly above the main caster 7 201040057 in the use state of the stroller, and the amount of protrusion of the auxiliary caster 10 The height of each frame member (the side frame 3, the side frame 4, and the back frame 5) and the length of the bottom plate 2 in the left-right direction are determined. Further, the force shown in the direction of the arrow shown in Fig. 4(a) is applied to the stroller in which the center of gravity shown in Fig. 4(a) is moved toward the side of the auxiliary caster and is in a stable state in which it is difficult to fall backward, (4) i The center of gravity moves rearward, as shown in Fig. _, the auxiliary caster 1 of the cart 1 is lifted from the ground 12, and the stroller is tilted rearward, even in this case, the main caster 8 located behind the material i The front side main caster 7 is grounded at a position protruding rearward to prevent the cart from tipping over. The rear side main caster is protruded further rearward than the rear side main caster (set in the cart i of the embodiment) In the side frame 4), the apron has the front side main body: the support member having the step of the wheel 7 is located at the lower surface of the lower stage (refer to FIG. 9 (10) at a position lower than the lower surface of the stage of the stroller, because : When the folded cart 1 is placed in an overlapping position, the front side main caster 7 of the rigid side of the cart (over the side frame 4) is placed on top of each other. a support member with a step difference with the S-segment side main casters 7: the lower lower jaws enter the folded carts behind the overlapping positions Below the mouth, as shown in Fig. 6, when a plurality of carts are placed in an overlapping manner, the carts are placed in a gap without overlap. The upper portion of the support member 2a is also used to support the support as the abutment 2 In addition, at the bottom of the 5th von Daiyin platform, in the auxiliary caster 10, the support of the figure wheel 10 is formed as a thin front end, and the second mounting: the auxiliary leg and the shape of the arm 9 are 201040057. U-shaped member (not shown) or inverted [shaped member (omitted)", as shown in item 5, when the folded cart is placed overlaid! The arm 9 is housed in a nested manner in the support arm 9 of the staggered cart placed in the front (see Fig. 8), and does not hinder when placed in a heavy position. ι Although the length of the auxiliary caster 10 is large Referring to Figures 7 and 8), the support arm 9 can be accommodated in the front of the overlapping projections: in the support arm 9 'but the support arms can be arranged from the root to the front obliquely to overlap The support arm 9 of the rear cart placed is placed away from the support arm 9' of the front and placed cart. This is not the case in the embodiment. In the main caster (the mounting of the other side main casters 7 and the rear main caster members), the main (four) can be directly mounted to each of the frame members, and the indirect mounting can also be performed via a certain member, according to the installation.疋 It can be fixed by screws or the like, or it can be fixed by welding. a. Main casters (other side main casters 7, rear main casters $) One caster 7) uses casters with brakes, and all The wheeled part = the universal caster in the direction of travel, or the front and rear left and right are the universal casters, and the other casters are the fixed casters. [Embodiment 2] Fig. 9 is the other part of Fig. 1 4) member and back frame member Figure 2, the left and right side frames of the cart shown in Figure 2 (side frame 3, side frame; member by the plate (side plate 3a, side plate 4a, back plate (4) embodiment, and shows the movement of the folding action of the cart The panel members disposed above the bottom plate 2 of the cart 1 shown in FIG. 9 for preventing the collapse of the 9 201040057 cargo are respectively connected to the side panels and the side panels 4a by the connecting members & The back side of the connecting member 6 is fixed to the back plate 5a. And the side plate 3a through the coupling member in a side ^ a hinge coupling 6b, so 'side of these side plates 3a and 4 & 6b by the chain relatively freely rotatable. Further, as the moving wheel of the cart 1, the front main caster is respectively provided with the front, rear, left and right of the cart 1. One of the front casters 7 of the main caster is fixed to the front end of the side panel 3a member, and the other is fixed to the side panel. The front end of the member, in turn, the rear main caster 8 is fixed to the left and right sides of the member of the back plate 5a. Further, the folding operation of the stroller shown in Fig. 9 is the same as the folding operation of the cart shown in Fig. 2 and Fig. 2. The folding operation of the push 4 i of Fig. 9 will be described based on Fig. 9 . Fig. 9 (a) shows a stroller in a state of use. From this state, the bottom plate 2 as a stage is first raised on the backing side, and the fixing member (not shown) provided by the backing is first formed. The bottom plate 2 is fixed (see Fig. 9(b)). Next, the side plate 4a is folded toward the front side of the bottom plate 2 standing on the front side of the back plate 5a (refer to FIG. 9(c)). Finally, the side plate 3a is folded toward the front side 4& front side (refer to FIG. 9(d)), whereby The stroller can be folded up. Then, as shown in FIG. 9(c), by folding the side plate 4a toward the front side of the bottom plate 2 standing on the back plate & side, the front side main caster 7 is fixed to the front side of the side plate 4a and the front side of the side plate 4a is shown in FIG. Similarly, the cart is located further rearward than the side main casters 8 fixed to the left and right sides of the backboard 5a. Further, as shown in Fig. 9(d), by folding the side plate 3a toward the front side of the side plate 4a, the auxiliary caster 1 隐藏 hidden under the side plate 3a is in the same state as the stroller shown in Fig. 2, and 201040057 is protruded forward. The reference numeral η in the figure of the embodiment i is an auxiliary leg connected to the support arm 9 for supporting the support as the support of the wheel 1, and the reference plate 2 in the figure of the second embodiment is the bottom plate bracket of the bottom plate 2 of the stage. Moreover, compared with the legs of the conventional cart, the A t〇# call wheel is in a parallel state after being folded. 'Because the cart of the present embodiment is configured as the front side* _ recognize + r J (1) at least one master in the master caster The caster protrudes further rearward than the rear main caster, because &, ^, after folding one side frame to the back frame side, when folding the other side frame, Ο 4 TU 呷, two rear side main casters 8 The main caster 7 on the side of the side frame that was previously folded is grounded to prevent the cart 1 from tipping over, so that the cart i can be folded comfortably. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing an embodiment of a stroller of the present invention. Figure 2 is a perspective view showing the opposite side of the cart shown in Figure 。. Figure 3 is a side view of the folded cart. 4(a) and 4(b) are side views showing the cart in a state at the time of storage. Fig. 5 is a side view showing the state in which two carts are placed in an overlapping state. Fig. 6 is a side view showing a state in which a plurality of carts are placed in an overlapping manner. Figure 7 is a perspective view showing an embodiment of a cart. Fig. 8 is a partial cross-sectional view showing the state of the auxiliary caster portion when the cart is placed in an overlapping manner. Figure () (d) is a perspective view showing another embodiment of the cart and showing the folding operation. 11 201040057 [Description of main components] 1 Cart 2 Base 2a Support 2b Base bracket 3 Side frame 3a Side panel 4 Side frame 4a Side panel 5 Back frame 5 a Back panel 6 Link 6a Link 6b Hinge 7 Front side casters 8 Rear main casters 9 Support arms 10 Auxiliary casters 11 Pillars 12 Ground 12