JP4325936B2

JP4325936B2 - Trolley

Info

Publication number: JP4325936B2
Application number: JP2004244577A
Authority: JP
Inventors: 吉洋窪田
Original assignee: Sanko Co Ltd
Current assignee: Sanko Co Ltd
Priority date: 2004-08-25
Filing date: 2004-08-25
Publication date: 2009-09-02
Anticipated expiration: 2024-08-25
Also published as: JP2006062429A

Description

本発明は、合成樹脂製の台盤に複数のキャスターを取り付けてなる台車に関する。 The present invention relates to a carriage in which a plurality of casters are attached to a base made of synthetic resin.

従来の台車は、キャスターの座板を台盤の下面にボルトで固定した構造になっていた（例えば、特許文献１，２参照）。そして、台盤に座板を取り付ける作業を軽減するために、ボルトを用いずに座板を台盤に取り付けた台車が開発された。その一例として、図２６に示したものは、台盤１に設けたスライド受容部２に、座板３を水平方向から挿入し、座板３の両側面に備えた突起４，４をスライド受容部２の内面に凹凸係合させる構成になっていた（例えば、特許文献３）。また、図２７及び図２８に示したものは、台盤５に設けたスライド受容部６に座板７を挿入してから台盤５にストッパー８を組み付け、スライド受容部６の挿入口を塞ぐ構成になっていた（例えば、特許文献４）。
特許第３４０４６１９号公報（段落［００１２］，第３図）実公平７−３２３１４号公報（第１図）特開平９−２０７５０４号公報（第４図）特開平１１−２０７０６号公報（段落［００１８］、第６図、第７図） A conventional cart has a structure in which a seat plate of a caster is fixed to a lower surface of a platform with bolts (see, for example, Patent Documents 1 and 2). And in order to reduce the work which attaches a seat plate to a base, the cart which attached the base plate to the base without using a bolt was developed. As an example, the one shown in FIG. 26 is such that the seat plate 3 is inserted into the slide receiving portion 2 provided on the base plate 1 from the horizontal direction, and the protrusions 4, 4 provided on both side surfaces of the seat plate 3 are slide received. It was the structure which carries out uneven | corrugated engagement with the inner surface of the part 2 (for example, patent document 3). 27 and 28, the seat plate 7 is inserted into the slide receiving portion 6 provided on the base 5, and then the stopper 8 is assembled to the base 5 to block the insertion opening of the slide receiving portion 6. It was configured (for example, Patent Document 4).
Japanese Patent No. 3404619 (paragraph [0012], FIG. 3) No. 7-32314 (Fig. 1) JP-A-9-207504 (FIG. 4) Japanese Patent Laid-Open No. 11-20706 (paragraph [0018], FIGS. 6 and 7)

しかしながら、図２６に示した従来の台車では、突起４を備えた特殊形状の座板３が必要であったので、キャスターのコストがかかっていた。また、座板３をスライド受容部２に無理に挿入する構造であるから、作業性を考慮すると突起４とスライド受容部２の内面との係合力をあまり大きくすることができず、このため台車の使用中の振動等により、キャスターがガタついたり或いは外れる恐れがあった。
また、図２７及び図２８に示した従来の台車では、台盤５に対して、座板７は水平方向から組み付けられる一方、ストッパー８は垂直方向から組み付けられ、これら座板７及びストッパー８の台盤５に対する組付方向が異なっていたため、組付作業が煩雑であった。さらに、この台車では、図２８に示すように座板７の上側と下側の各支持部材９Ａ，９Ｂが上下方向で互いに対向していないので、座板７の支持が安定しないという問題も生じ得た。 However, since the conventional cart shown in FIG. 26 requires the specially shaped seat plate 3 provided with the protrusions 4, the cost of the caster is high. Further, since the seat plate 3 is forcibly inserted into the slide receiving portion 2, the engagement force between the protrusion 4 and the inner surface of the slide receiving portion 2 cannot be increased so much in consideration of workability. The caster may rattle or come off due to vibration during use.
In the conventional cart shown in FIGS. 27 and 28, the seat plate 7 is assembled to the base 5 from the horizontal direction, while the stopper 8 is assembled from the vertical direction. Since the assembling direction with respect to the base 5 was different, the assembling work was complicated. Further, in this cart, as shown in FIG. 28, the upper and lower support members 9A and 9B of the seat plate 7 are not opposed to each other in the vertical direction, so that the support of the seat plate 7 is not stable. Obtained.

本発明は、上記事情に鑑みてなされたもので、従来より座板を容易に台盤に組み付けることが可能であると共にキャスターのコストを抑えることができ、さらに、台盤に対する座板の固定を安定させることが可能な台車の提供を目的とする。 The present invention has been made in view of the above circumstances, and it has been possible to easily assemble a seat plate to a base plate as compared with the prior art, and to reduce the cost of casters. Further, the seat plate can be fixed to the base plate. The purpose is to provide a cart that can be stabilized.

上記目的を達成するためになされた請求項１の発明に係る台車は、合成樹脂製の台盤に、複数のキャスターを取り付けてなる台車において、台盤には、キャスターの座板が水平方向から挿入されるスライド受容部が設けられ、そのスライド受容部には、挿入された座板に摺接して上方に弾性変形しかつ座板がスライド受容部の奥部に到達したときに復元して座板の縁部に係止することで座板を抜け止めするロックアームが形成され、ロックアームの上方空間に水平方向から挿入されて、ロックアームの上方への弾性変形を規制するリテーナーと、リテーナーを台盤に係止するためのリテーナー係止部とを備えたところに特徴を有する。 In order to achieve the above object, a cart according to the invention of claim 1 is a cart in which a plurality of casters are attached to a base made of synthetic resin. An inserted slide receiving portion is provided. The slide receiving portion slides into contact with the inserted seat plate and elastically deforms upward, and is restored when the seat plate reaches the back of the slide receiving portion. A retainer that locks on the edge of the plate to prevent the seat plate from coming off and is inserted into the space above the lock arm from the horizontal direction to restrict elastic deformation upward of the lock arm, and the retainer And a retainer engaging portion for engaging the base plate with the base plate .

請求項２の発明は、請求項１に記載の台車において、スライド受容部における座板及びリテーナーの挿入口は、共に台盤の側面に開放したところに特徴を有する。 The invention according to claim 2 is characterized in that, in the cart according to claim 1 , both the seat plate and the insertion port of the retainer in the slide receiving portion are open to the side surface of the base.

請求項３の発明は、請求項２に記載の台車において、台盤は、荷物が載置される矩形の天板壁の下面にリブを形成してなり、スライド受容部は、台盤の四隅に配置されて天板壁によって上部が閉じられると共に、天板壁の下面から起立した奥部リブと１対の側部リブとによって奥部及び両側部が閉じられ、さらに、１対の側部リブの下端縁から互いに接近する方向に張り出した１対の下方支持壁によって、座板の両側縁部を下方から支持する一方、天板壁の下面から起立しかつ側部リブと平行に延びた複数の上方支持壁によって、座板を上方から支持するように構成され、ロックアームは、先端に矢尻状のロック突部を有する片持ち梁状をなして、隣り合った上方支持壁の間に配置されたところに特徴を有する。 According to a third aspect of the present invention, in the carriage according to the second aspect , the base is formed with ribs on the lower surface of the rectangular top plate wall on which the load is placed, and the slide receiving portions are formed at the four corners of the base. The upper part is closed by the top plate wall and the back part and both side parts are closed by the rear part rib and the pair of side part ribs that stand from the lower surface of the top panel wall, and the lower ends of the pair of side part ribs. A pair of lower support walls projecting in a direction approaching each other from the edges supports both side edges of the seat plate from below, while standing up from the lower surface of the top plate wall and extending in parallel with the side ribs It is configured to support the seat plate from above with a wall, and the lock arm is in the form of a cantilever with an arrowhead-like lock projection at the tip, and is arranged between adjacent upper support walls It has the characteristics.

請求項４の発明は、請求項３に記載の台車において、リテーナーには、ロックアームと天板壁との間に嵌合されるロック解除規制嵌合部と、ロック解除規制嵌合部の端部に一体形成されて、挿入口を塞ぐ閉塞板とが備えられたところに特徴を有する。 According to a fourth aspect of the present invention, in the carriage according to the third aspect , the retainer includes an unlocking restriction fitting portion fitted between the lock arm and the top plate wall, and an end portion of the unlocking restriction fitting portion. And a blocking plate that closes the insertion port.

請求項５の発明は、請求項４に記載の台車において、閉塞板は、挿入口の内側に嵌合されたところに特徴を有する。 The invention of claim 5 is characterized in that, in the carriage according to claim 4 , the closing plate is fitted inside the insertion port.

請求項６の発明は、請求項４又は５に記載の台車において、座板と天板壁との間に嵌合されて、各下方支持壁との間で座板を挟んで対向しかつ座板を挟持した補強嵌合部をリテーナーに一体形成したところに特徴を有する。 The invention according to claim 6 is the carriage according to claim 4 or 5 , wherein the carriage is fitted between the seat plate and the top plate wall and is opposed to each other with the seat plate interposed between the lower support walls. The reinforcement fitting part which pinched | interposed was characterized by integrally forming to a retainer.

請求項７の発明は、請求項４乃至６の何れかに記載の台車において、ロック解除規制嵌合部及び／又は補強嵌合部の先端下側角部を面取りして嵌合ガイド部を形成したところに特徴を有する。 The invention according to claim 7 is the carriage according to any one of claims 4 to 6 , wherein the fitting guide portion is formed by chamfering the lower end corner portion of the lock release restricting fitting portion and / or the reinforcing fitting portion. It has the characteristics in that place.

請求項８の発明は、請求項３乃至７の何れかに記載の台車において、ロックアームの両側に位置した１対の上方支持壁を、奥部リブに接続すると共に、１対の上方支持壁の間に差し渡されかつ奥部リブに接続された上面対向壁を設け、ロックアームは、上面対向壁から延長して形成されたところに特徴を有する。 The invention according to claim 8 is the carriage according to any one of claims 3 to 7 , wherein the pair of upper support walls located on both sides of the lock arm are connected to the inner rib and the pair of upper support walls. An upper surface facing wall is provided between the upper surface ribs and connected to the inner rib, and the lock arm is characterized in that it is formed extending from the upper surface facing wall.

請求項９の発明は、請求項３乃至８の何れかに記載の台車において、リテーナー係止部には、側部リブに貫通形成されたリテーナー係止孔と、補強嵌合部にスリットを形成してなる片持ち梁状のリテーナー係止片と、リテーナー係止片の先端に突出形成され、リテーナー係止孔に凹凸係合する係合突起とが備えられたところに特徴を有する。 According to a ninth aspect of the present invention, in the carriage according to any one of the third to eighth aspects, the retainer locking portion has a retainer locking hole formed through the side rib and a slit formed in the reinforcing fitting portion. It has a feature in that it has a cantilever-like retainer locking piece and an engaging protrusion that protrudes from the tip of the retainer locking piece and engages with the retainer locking hole.

請求項１０の発明は、請求項１乃至９の何れかに記載の台車において、リテーナーは、積載予定の荷物の種類に応じて台車毎に色分けされたところに特徴を有する。 A tenth aspect of the invention is characterized in that, in the cart according to any one of the first to ninth aspects, the retainer is color-coded for each of the carts according to the type of luggage to be loaded.

請求項１１の発明は、請求項１乃至１０の何れかに記載の台車において、台盤は長方形状であり、複数の台車が交互に９０度向きを異ならせて積み上げ可能に構成され、台盤の上面に開放した積載位置決孔と、台盤の下面に形成されて、下側の台車の上面に面当接しかつ上側の台車が下側の台車の長手方向の中央に位置したときに、積載位置決孔に凹凸係合する第１積載突部と、第１積載突部が、下側の台車の上面に面当接した場合には下側の台車の上面から浮いた状態になり、第１積載突部が積載位置決孔に凹凸係合したときに、下側の台車の上面に面当接する第２積載突部と、台盤の両側縁部から上方に起立し、下側の台車の上面から浮いた状態の第２積載突部に側方から隣接し、上側の台車の長手方向の中心に下側の台車を位置決めした状態を維持して、上側の台車を下側の台車の長手方向に案内する上面ガイド壁とを備えたところに特徴を有する。
請求項１２の発明に係る台車は、合成樹脂製の台盤に、複数のキャスターを取り付けてなる台車において、台盤は長方形状であり、複数の台車が交互に９０度向きを異ならせて積み上げ可能に構成され、台盤の上面に開放した積載位置決孔と、台盤の下面に形成されて、下側の台車の上面に面当接しかつ上側の台車が下側の台車の長手方向の中央に位置したときに、積載位置決孔に凹凸係合する第１積載突部と、第１積載突部が、下側の台車の上面に面当接した場合には下側の台車の上面から浮いた状態になり、第１積載突部が積載位置決孔に凹凸係合したときに、下側の台車の上面に面当接する第２積載突部と、台盤の両側縁部から上方に起立し、下側の台車の上面から浮いた状態の第２積載突部に側方から隣接し、上側の台車の長手方向の中心に下側の台車を位置決めした状態を維持して、上側の台車を下側の台車の長手方向に案内する上面ガイド壁とを備え、台盤には、キャスターの座板が水平方向から挿入されるスライド受容部が設けられ、そのスライド受容部には、挿入された座板に摺接して上方に弾性変形しかつ座板がスライド受容部の奥部に到達したときに復元して座板の縁部に係止することで座板を抜け止めするロックアームが形成されたところに特徴を有する。 The invention of claim 11 is the carriage according to any one of claims 1 to 10 , wherein the carriage has a rectangular shape, and a plurality of carriages are alternately stacked at 90 degrees, A loading position opening hole opened on the top surface of the base plate, and formed on the bottom surface of the base plate, in surface contact with the top surface of the bottom cart and when the top cart is located at the center of the longitudinal direction of the bottom cart, When the first loading projection that engages with the loading position determination hole and the first loading projection are in surface contact with the upper surface of the lower cart, the first loading projection is in a state of floating from the upper surface of the lower cart, When the first loading protrusion is engaged with the loading position determination hole, the second loading protrusion that comes into surface contact with the upper surface of the lower carriage and the upper side of the base stand up and Position the lower carriage at the center in the longitudinal direction of the upper carriage, adjacent to the second loading projection that floats from the upper surface of the carriage. While maintaining the state, it has the characteristics of the upper carriage in place and a top surface guide wall for guiding the longitudinal direction of the lower carriage.
The trolley according to the invention of claim 12 is a trolley in which a plurality of casters are attached to a base made of synthetic resin, the base is rectangular, and the plurality of trolleys are alternately stacked at 90 degrees. A loading positioning hole that is open on the top surface of the base plate and formed on the bottom surface of the base plate so as to abut the top surface of the bottom cart and the upper cart in the longitudinal direction of the bottom cart When the first loading protrusion and the first loading protrusion are in contact with the upper surface of the lower carriage when positioned in the center, the upper surface of the lower carriage is in contact with the upper surface of the lower carriage. When the first stacking protrusion comes into contact with the loading position determination hole, the second stacking protrusion comes into surface contact with the upper surface of the lower cart, and the upper side from both side edges of the base plate. And is adjacent to the second loading projection in a state of being lifted from the upper surface of the lower cart and from the side, and the longitudinal direction of the upper cart An upper surface guide wall that guides the upper carriage in the longitudinal direction of the lower carriage while maintaining the position of the lower carriage at the center is provided, and a caster seat plate is inserted into the carriage from the horizontal direction. The slide receiving portion is provided, and the slide receiving portion is slidably contacted with the inserted seat plate and elastically deformed upward, and restored when the seat plate reaches the back of the slide receiving portion. It has a feature in that a lock arm is formed to prevent the seat plate from coming off by being locked to the edge of the.

［請求項１及び２の発明］
請求項１の台車では、スライド受容部にキャスターの座板を挿入すると、ロックアームが座板に摺接して上方に弾性変形し、座板がスライド受容部の奥部に到達したときにロックアームが復元して座板をスライド受容部内に抜け止めする。このように本発明によれば、スライド受容部に座板を挿入するだけで座板が抜け止めされるので、従来に比べて座板を容易に台盤に組み付けることができる。しかも、ロックアームは、座板の縁部に係止するので座板を特種構造にしなくてもよく、キャスターのコストを従来より抑えることができる。そして、ロックアームが座板をスライド受容部内に抜け止めした状態で、リテーナーを台盤に組み付けると、ロックアームの弾性変形が規制され、ロックアームによる座板の係止力が高まる。さらに、請求項２の構成によれば、座板とリテーナーとを、台盤のスライド受容部に対して同じ方向から挿入組み付けすることができるので、組み付け作業を効率よく行うことができる。 [Inventions of Claims 1 and 2 ]
In the cart of claim 1, when the seat plate of the caster is inserted into the slide receiving portion, the lock arm is slidably contacted with the seat plate and elastically deformed upward, and when the seat plate reaches the back of the slide receiving portion, the lock arm Is restored, and the seat plate is prevented from slipping into the slide receiving portion. As described above, according to the present invention, since the seat plate is prevented from coming off simply by inserting the seat plate into the slide receiving portion, the seat plate can be easily assembled to the base plate as compared with the conventional art. In addition, since the lock arm is locked to the edge of the seat plate, the seat plate does not have to have a special structure, and the cost of the caster can be reduced as compared with the related art. When the retainer is assembled to the base plate with the lock arm preventing the seat plate from slipping into the slide receiving portion, elastic deformation of the lock arm is restricted, and the locking force of the seat plate by the lock arm is increased. Furthermore, according to the structure of Claim 2, since a seat board and a retainer can be inserted and assembled | attached with respect to the slide receiving part of a base board from the same direction, an assembly | attachment operation | work can be performed efficiently.

［請求項３の発明］
請求項３の構成によれば、スライド受容部に備えた下方支持壁と上方支持壁とが座板を上下方向で位置決めし、１対の側部リブと奥部リブとロックアームのロック突部とが座板を水平方向で四方から囲んで位置決めする。これらにより座板が台盤に対して全方向に移動不能に固定される。 [Invention of claim 3]
According to the configuration of the third aspect , the lower support wall and the upper support wall provided in the slide receiving portion position the seat plate in the vertical direction, and the pair of side ribs, the rear ribs, and the lock protrusions of the lock arm. And position the seat plate in the horizontal direction by surrounding it from all sides. As a result, the seat plate is fixed so as not to move in all directions with respect to the base plate.

［請求項４の発明］
請求項４の構成によれば、リテーナーを台盤に組み付けると、リテーナーに備えたロック解除規制嵌合部がロックアームと天板壁との間に配置されてロックアームの弾性変形が規制されると共に、リテーナーに備えた閉塞板によってスライド受容部の挿入口を塞ぐことができる。 [Invention of claim 4 ]
According to the configuration of the fourth aspect , when the retainer is assembled to the base, the lock release restricting fitting portion provided in the retainer is disposed between the lock arm and the top plate wall, and elastic deformation of the lock arm is restricted. The insertion port of the slide receiving portion can be closed by the closing plate provided in the retainer.

［請求項５の発明］
請求項５の構成によれば、スライド受容部における挿入口の開口縁を、閉塞板によって内側から補強することができる。 [Invention of claim 5 ]
According to the configuration of the fifth aspect , the opening edge of the insertion opening in the slide receiving portion can be reinforced from the inside by the closing plate.

［請求項６の発明］
請求項６の構成によれば、座板を挟持した下方支持壁と補強嵌合部とが座板を挟んで上下方向で互いに対向した構造になっているので、従来のように座板の上側と下側の各支持部材が上下方向で互いに対向していない構造のものに比べて、台盤に対する座板の固定が安定する。 [Invention of claim 6 ]
According to the configuration of the sixth aspect , since the lower support wall sandwiching the seat plate and the reinforcement fitting portion are opposed to each other in the vertical direction with the seat plate sandwiched therebetween, Compared to a structure in which the support members on the lower side and the lower side are not opposed to each other in the vertical direction, the fixing of the seat plate to the base is stabilized.

［請求項７の発明］
請求項７の構成によれば、リテーナーを台盤に挿入組み付けする過程で、嵌合ガイド部がロックアーム及び／又は座板に摺接して、リテーナーをロックアーム及び／又は座板の上方に案内するので、リテーナーの挿入組み付け作業をスムーズに行うことができる。 [Invention of Claim 7 ]
According to the configuration of the seventh aspect , in the process of inserting and assembling the retainer to the base plate, the fitting guide portion is in sliding contact with the lock arm and / or the seat plate, and the retainer is guided above the lock arm and / or the seat plate. Thus, the retainer can be inserted and assembled smoothly.

［請求項８の発明］
請求項８の構成によれば、１対の上方支持壁と奥部リブと上面対向壁と天板壁とが互いに接続されて箱形構造になり、強度アップを図ることができる。そして、この強度アップが図られた部分からロックアームが延長して形成されているから、ロックアームによる座板の係止が安定する。 [Invention of Claim 8 ]
According to the configuration of the eighth aspect, the pair of upper support walls, the rear ribs, the upper surface facing wall, and the top plate wall are connected to each other to form a box-like structure, and the strength can be increased. Since the lock arm is formed to extend from the portion where the strength is increased, the locking of the seat plate by the lock arm is stabilized.

［請求項９の発明］
請求項９の構成によれば、リテーナー係止孔に工具を突入させてリテーナー係止片を撓ませ、係合突起とリテーナー係止孔との凹凸係合を解除してリテーナーを台盤から離脱することができる。そして、ロックアームを上方に撓ませてキャスターを台盤から外すことができる。 [Invention of claim 9 ]
According to the structure of the ninth aspect , the tool is inserted into the retainer locking hole to bend the retainer locking piece, and the uneven engagement between the engaging protrusion and the retainer locking hole is released to remove the retainer from the base plate. can do. Then, the caster can be detached from the base plate by bending the lock arm upward.

［請求項１０の発明］
請求項１０の構成によれば、リテーナーの色に基づいて、どのような種類の荷物を搬送するための台車かを容易に判別することができる。 [Invention of Claim 10 ]
According to the configuration of the tenth aspect , it is possible to easily determine what kind of cargo is to be transported based on the color of the retainer.

［請求項１１及び１２の発明］
請求項１１及び１２の構成によれば、複数の台車を９０度向きを異ならせて積み上げると、上側の台車の第２積載突部における側面が、下側の台車の上面ガイド壁に隣接し、上側の台車における長手方向の中央に下側の台車が位置決めされる。この状態で、第２積載突部を上面ガイド壁に沿わせて、上側の台車を下側の台車における長手方向に移動させると、下側の台車における長手方向の中央に上側の台車が位置したときに、上側の台車の第１積載突部が、下側の台車の積載位置決孔に凹凸係合する。これにより、９０度向きを異ならせて積み上げた上下の台車を、互いの長手方向の中央に容易に位置決めすることができる。 [Inventions of Claims 11 and 12 ]
According to the configuration of claims 11 and 12 , when a plurality of carts are stacked at 90 degrees, the side surface of the second loading projection of the upper cart is adjacent to the upper surface guide wall of the lower cart, The lower cart is positioned at the longitudinal center of the upper cart. In this state, when the upper carriage is moved in the longitudinal direction of the lower carriage along the second loading projection along the upper surface guide wall, the upper carriage is located at the center in the longitudinal direction of the lower carriage. Sometimes, the first loading projection of the upper cart engages with the loading position determination hole of the lower cart. Thereby, the upper and lower trolley | bogies piled up in 90 degree directions can be easily positioned in the center of a mutual longitudinal direction.

［第１実施形態］
以下、本発明の一実施形態を図１〜図１９に基づいて説明する。
図１に示すように本実施形態の台車１０は、台盤１１の下面に複数のキャスター１２を備えている。キャスター１２は、図２に全体が示されており、汎用部品として流通しているものであって、座板１３の下面中央に車輪支持脚１４を旋回可能に連結して備え、その車輪支持脚１４に車輪１５が回転可能に保持された構造になっている。座板１３は、例えば平面形状が長方形になっており、座板１３の四隅にはボルト通し孔１３Ａが貫通形成されている。なお、車輪１５の回転軸は、座板１３に対する車輪支持脚１４の旋回軸からずれており、これにより台車１０の進む方向に応じて車輪支持脚１４が自在に旋回する。 [First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the cart 10 of the present embodiment includes a plurality of casters 12 on the bottom surface of the base plate 11. The caster 12 is shown as a whole in FIG. 2 and is distributed as a general-purpose part. The caster 12 is provided with a wheel support leg 14 pivotably connected to the center of the lower surface of the seat plate 13, and the wheel support leg. 14 has a structure in which a wheel 15 is rotatably held. The seat plate 13 has a rectangular planar shape, for example, and bolt through holes 13 A are formed through the four corners of the seat plate 13. Note that the rotation axis of the wheel 15 is deviated from the turning axis of the wheel support leg 14 with respect to the seat plate 13, and thus the wheel support leg 14 freely turns according to the traveling direction of the carriage 10.

台盤１１は、合成樹脂の射出成形品であって、平面形状が長方形になっている。台盤１１のうち荷物が載置される部分には、長方形の天板壁２０が備えられ、図３に示すように、天板壁２０の下面には、補強用のリブ２１が網の目状に張り巡らされている。また、図２に示すように、天板壁２０のうち長手方向両端の外縁部からは、１対の端部枠壁２２，２２が上下に突出している。この端部枠壁２２は、天板壁２０より上側においては、天板壁２０の短手方向の中央部分が切除され、天板壁２０より下側においては、天板壁２０の短手方向の中間部分のみに形成されている。また、天板壁２０のうち短手方向両端の外縁部からは、１対の側部枠壁２３，２３が上下に起立している。そして、側部枠壁２３のうち天板壁２０より上方に突出した部分が、本発明に係る「上面ガイド壁」を構成している。 The base plate 11 is an injection-molded product of synthetic resin and has a rectangular planar shape. A rectangular top plate wall 20 is provided on a portion of the base plate 11 where a load is placed. As shown in FIG. 3, reinforcing ribs 21 are formed in a mesh shape on the lower surface of the top plate wall 20. It is stretched around. In addition, as shown in FIG. 2, a pair of end frame walls 22, 22 protrude vertically from outer edge portions at both ends in the longitudinal direction of the top plate wall 20. The end frame wall 22 is cut away from the central portion in the short direction of the top plate wall 20 above the top plate wall 20, and only in the middle portion of the top plate wall 20 in the short direction below the top plate wall 20. Is formed. In addition, a pair of side frame walls 23, 23 stands up and down from the outer edge portions of the top plate wall 20 at both ends in the short direction. And the part which protruded upwards from the top-plate wall 20 among the side part frame walls 23 comprises the "upper surface guide wall" which concerns on this invention.

台盤１１には、台盤１１の長手方向を二分する第１の中心線ＣＬ１（図２参照）に沿って第１の把持孔２４，２４（本発明に係る「積載位置決孔」に相当する）が並べて形成され、台盤１１の短手方向を二分する第２の中心線ＣＬ２（図２参照）に沿って第２の把持孔２５，２５が並べて形成されている。これら第１及び第２の把持孔２４，２５は、天板壁２０の各外縁部寄り位置を貫通し、かつ、その外縁部に沿った長孔形状になっている。また、図３に示すように各把持孔２４，２５の開口縁からは、天板壁２０の下方に向けて筒状のリブ２４Ａ，２５Ａが形成されている。さらに、図２に示すように、天板壁２０の上面側における各把持孔２４，２５の開口縁は丸みを帯びてリブ２４Ａ，２５Ａの内面に連続している。これらにより、第１及び第２の把持孔２４，２５に作業者の手をスムーズに挿入することができ、台車１０を容易に持ち上げることができる。また、第２の把持孔２５は、端部枠壁２２のうち天板壁２０の上方における中央の切り欠き部分に対応しており、これにより、把持孔２５の内面と台盤１１の外側面とを手の親指とその他の指とで容易に把持することができる。 The base 11 has first grip holes 24 and 24 (corresponding to “loading position determination holes” according to the present invention) along a first center line CL1 (see FIG. 2) that bisects the longitudinal direction of the base 11. Are formed side by side, and second holding holes 25 and 25 are formed side by side along a second center line CL2 (see FIG. 2) that bisects the lateral direction of the base plate 11. These 1st and 2nd holding holes 24 and 25 have penetrated the position near each outer edge part of the top-plate wall 20, and have become the long hole shape along the outer edge part. As shown in FIG. 3, cylindrical ribs 24 A and 25 A are formed from the opening edges of the gripping holes 24 and 25 toward the lower side of the top wall 20. Further, as shown in FIG. 2, the opening edges of the gripping holes 24 and 25 on the upper surface side of the top plate wall 20 are rounded and continuous with the inner surfaces of the ribs 24A and 25A. By these, an operator's hand can be smoothly inserted in the 1st and 2nd holding holes 24 and 25, and the trolley | bogie 10 can be lifted easily. Further, the second gripping hole 25 corresponds to the central cutout portion of the end frame wall 22 above the top plate wall 20, and thereby the inner surface of the gripping hole 25 and the outer surface of the base plate 11. Can be easily grasped with the thumb of the hand and other fingers.

台盤１１の下面からは、前記第１の中心線ＣＬ１（図２参照）に沿って第１の脚部２６，２６が並べて設けられ、前記第２の中心線ＣＬ２（図２参照）に沿って第２の脚部２９，２９が並べて設けられている。これら第１及び第２の脚部２６，２９は、図１に示すように、台盤１１の下面から垂下され、これら脚部２６，２９の下端面はキャスター１２における地面又は床面との接点より上方に位置している。そして、図４に示すように、下側の台車１０に対して上側の台車１０の向きを９０度異ならせた状態にして、上側の台車１０の脚部２６，２９を、下方の台車１０の上面に突き当てて積み上げることができる（以下、これを「クロス積み」という）。 From the lower surface of the base 11, first leg portions 26 are provided side by side along the first center line CL 1 (see FIG. 2), and along the second center line CL 2 (see FIG. 2). Second leg portions 29, 29 are provided side by side. As shown in FIG. 1, the first and second leg portions 26 and 29 are suspended from the lower surface of the base 11, and the lower end surfaces of the leg portions 26 and 29 are in contact with the ground or floor surface of the caster 12. It is located higher. Then, as shown in FIG. 4, the direction of the upper carriage 10 is changed by 90 degrees with respect to the lower carriage 10, and the legs 26 and 29 of the upper carriage 10 are connected to the lower carriage 10. It can be stacked against the top surface (hereinafter referred to as “cross stack”).

上記した第２の脚部２９，２９は、本発明に係る「第２積載突部」に相当し、図３に示すように、その第２の脚部２９の下端面２９Ｔからは、下方に向けて位置決突部２８（本発明に係る「第１積載突部」に相当する）が突出している。そして、図７に示すように、第１の脚部２６の下端面２６Ｔと、第２の脚部２９の下端面２９Ｔとが面一になっており、位置決突部２８の下端面２８Ｔが、それら第１及び第２の脚部２６，２９の下端面２６Ｔ，２９Ｔから下方にオフセットしている。また、両方の第２の脚部２９，２９の間で互いに最も離れた側面２９Ａ，２９Ａ同士の間隔は、側部枠壁２３，２３同士の間に丁度収まる大きさになっている。さらに、位置決突部２８，２８は、下側の台車１０における第１の把持孔２４，２４に嵌合可能となっている。 The above-mentioned second leg portions 29 and 29 correspond to the “second loading projection” according to the present invention, and as shown in FIG. 3, from the lower end surface 29T of the second leg portion 29 downward. The positioning protrusion 28 (corresponding to the “first loading protrusion” according to the present invention) protrudes toward the head. 7, the lower end surface 26T of the first leg portion 26 and the lower end surface 29T of the second leg portion 29 are flush with each other, and the lower end surface 28T of the positioning protrusion 28 is The first and second leg portions 26 and 29 are offset downward from the lower end surfaces 26T and 29T. Further, the distance between the side surfaces 29A and 29A that are the farthest from each other between the second leg portions 29 and 29 is such that it is just fit between the side frame walls 23 and 23. Further, the positioning protrusions 28 and 28 can be fitted into the first gripping holes 24 and 24 in the lower cart 10.

この構成によれば、複数の台車１０をクロス積みする際には、上側の台車１０の各脚部２６，２９が下側の台車１０の端部枠壁２２及び側部枠壁２３の内側に収まるようにして大まかに積み上げればよい。すると、図７に示すように、上側の台車１０の位置決突部２８における下端面２８Ｔが、下側の台車１０の上面に面当接すると共に、上側の台車１０の第２の脚部２９，２９における側面２９Ａ，２９Ａが、下側の台車１０における両側部枠壁２３，２３に隣接して、上側の台車１０における長手方向の中央に下側の台車１０が位置決めされる。 According to this configuration, when the plurality of carriages 10 are cross-stacked, the legs 26 and 29 of the upper carriage 10 are placed inside the end frame wall 22 and the side frame wall 23 of the lower carriage 10. You just have to stack up roughly to fit. Then, as shown in FIG. 7, the lower end surface 28T of the positioning protrusion 28 of the upper carriage 10 is in surface contact with the upper surface of the lower carriage 10, and the second legs 29, The lower carriage 10 is positioned at the longitudinal center of the upper carriage 10 such that the side faces 29A and 29A of the upper carriage 10 are adjacent to the side frame walls 23 and 23 of the lower carriage 10.

この状態で、図５から図６の変化に示すように、第２の脚部２９，２９を側部枠壁２３，２３に沿わせて、上側の台車１０を下側の台車１０における長手方向に移動させる。すると、下側の台車１０における長手方向の中央に上側の台車１０が位置したときに、上側の台車１０の位置決突部２８，２８が、下側の台車１０の把持孔２４，２４に凹凸係合する（図８及び図９参照）。そして、図８に示すように、上側の台車１０の第１及び第２の脚部２６，２９の下端面２６Ｔ，２９Ｔが、下側の台車１０の上面に面当接した状態になって安定する。このようにして、本実施形態の構成によれば、クロス積みした上下の台車１０，１０を、互いの長手方向の中央に容易に位置決めすることができる。 In this state, as shown in the change in FIG. 5 to FIG. 6, the second leg portions 29, 29 are placed along the side frame walls 23, 23, and the upper cart 10 is moved in the longitudinal direction of the lower cart 10. Move to. Then, when the upper carriage 10 is positioned at the longitudinal center of the lower carriage 10, the positioning protrusions 28 and 28 of the upper carriage 10 are uneven in the gripping holes 24 and 24 of the lower carriage 10. Engage (see FIGS. 8 and 9). Then, as shown in FIG. 8, the lower end surfaces 26T and 29T of the first and second leg portions 26 and 29 of the upper cart 10 are in contact with the upper surface of the lower cart 10 and are stable. To do. In this way, according to the configuration of the present embodiment, the upper and lower carts 10 and 10 that are cross-stacked can be easily positioned at the center in the longitudinal direction of each other.

さて、台盤１１における下面の四隅には、図３に示すようにキャスター１２の座板１３を取り付けるための複数のスライド受容部４０が設けられている。スライド受容部４０は、天板壁２０によって上部が閉じられている。また、図１０に拡大して示すように、スライド受容部４０は、前記した側部枠壁２３の一部（本発明の「１対の側部リブ」の一方に相当する）と、天板壁２０から垂下した側部リブ４２（本発明の「１対の側部リブ」の他方に相当する）とによって両側部が閉じられ、さらに、天板壁２０から垂下した奥部リブ４３によって奥部が閉じられている。この奥部リブ４３は、側部リブ４２の端部と直交し、側部枠壁２３の中間部に繋がっている。そして、スライド受容部４０は、台盤１１における長手方向の端面に挿入口４１を開放して備え、ここから座板１３がスライド受容部４０内に挿入される。 Now, a plurality of slide receiving portions 40 for attaching the seat plate 13 of the caster 12 are provided at the four corners of the lower surface of the base plate 11 as shown in FIG. The upper portion of the slide receiving portion 40 is closed by the top wall 20. Further, as shown in an enlarged view in FIG. 10, the slide receiving portion 40 includes a part of the side frame wall 23 (corresponding to one of “a pair of side ribs” of the present invention) and a top plate wall. Both sides are closed by side ribs 42 (corresponding to the other of the “one pair of side ribs” of the present invention) that hang down from 20, and the back part is further closed by a back rib 43 that hangs down from the top wall 20. Closed. The back rib 43 is orthogonal to the end of the side rib 42 and is connected to the intermediate portion of the side frame wall 23. The slide receiving portion 40 is provided with an insertion port 41 opened at the end face in the longitudinal direction of the base plate 11, and the seat plate 13 is inserted into the slide receiving portion 40 from here.

スライド受容部４０のうち、側部リブ４２及び側部枠壁２３の各下端縁からは、互いに接近する方向に下方支持壁４４，４４が張り出されている。これら下方支持壁４４は、スライド受容部４０の挿入口４１から奥部リブ４３に亘って延びかつ奥部リブ４３に接続されている。 In the slide receiving portion 40, lower support walls 44, 44 project from the lower end edges of the side rib 42 and the side frame wall 23 in a direction approaching each other. These lower support walls 44 extend from the insertion port 41 of the slide receiving portion 40 to the back rib 43 and are connected to the back rib 43.

スライド受容部４０の内部には、スライド受容部４０を横方向（座板１３の挿入方向と直交する方向）で略三等分する位置に１対の上方支持壁４５，４５が設けられている。各上方支持壁４５は、天板壁２０から垂下しかつ側部リブ４２と平行に延びかつ奥部リブ４３に接続されている。また、上方支持壁４５における挿入口４１側の端部は、台盤１１の外面より若干奥側に位置している。さらに、図１８に示すように、上方支持壁４５の下端面４５Ｔは、下方支持壁４４の上面４４Ａより若干上方側に位置している。 Inside the slide receiving portion 40, the slide receiving portion 40 a pair of laterally substantially trisect located at (seat plate 13 in the insertion direction and Cartesian directions) upper support walls 45 and 45 are provided Yes. Each upper support wall 45 is suspended from the top plate wall 20, extends in parallel with the side ribs 42, and is connected to the back ribs 43. Further, the end of the upper support wall 45 on the side of the insertion port 41 is located slightly behind the outer surface of the base plate 11. Further, as shown in FIG. 18, the lower end surface 45T of the upper support wall 45 is located slightly above the upper surface 44A of the lower support wall 44.

図１０に示すように、スライド受容部４０の奥部において、１対の上方支持壁４５，４５の下端部の間には、上面対向壁４６が差し渡されている。上面対向壁４６は、上方支持壁４５の下端面と面一になっており、奥部リブ４３に接続されている。また、上面対向壁４６のうち奥部リブ４３と反対側の端部は、上方支持壁４５の長手方向における略１／３の位置に配置され、その上面対向壁４６の端部から挿入口４１側にロックアーム４７が延長して形成されている。ロックアーム４７の先端面は、上方支持壁４５における挿入口４１側の端面と面一になっており、ロックアーム４７と両上方支持壁４５，４５との間には、スリット４７Ｓ，４７Ｓが形成されている。また、ロックアーム４７の先端下面には、ロック突部４８が突出形成されている。ロック突部４８は、挿入口４１側から離れるに従って徐々に下方に向かったテーパ面４８Ａと、奥部リブ４３に対向した係止面４８Ｂとを備えた矢尻状になっている。 As shown in FIG. 10, an upper surface facing wall 46 is interposed between the lower end portions of the pair of upper support walls 45, 45 in the back portion of the slide receiving portion 40. The upper surface facing wall 46 is flush with the lower end surface of the upper support wall 45 and is connected to the inner rib 43. Further, the end of the upper surface facing wall 46 opposite to the inner rib 43 is disposed at a position that is approximately 1/3 in the longitudinal direction of the upper support wall 45, and the insertion port 41 extends from the end of the upper surface facing wall 46. A lock arm 47 is formed extending on the side. The distal end surface of the lock arm 47 is flush with the end surface of the upper support wall 45 on the insertion port 41 side, and slits 47S and 47S are formed between the lock arm 47 and the upper support walls 45 and 45. Has been. Further, a lock projection 48 is formed to protrude from the lower surface of the tip of the lock arm 47. The lock protrusion 48 has an arrowhead shape including a tapered surface 48A that gradually goes downward as it is away from the insertion port 41 side, and a locking surface 48B that faces the back rib 43.

スライド受容部４０には、台盤１１とは別部品のリテーナー６０が挿入組み付けされる。リテーナー６０は、例えば合成樹脂の射出成形品であって、挿入方向の後端部に閉塞板６１を備えている。閉塞板６１は、長方形になっており、その長辺は水平方向に延び、短辺は上下方向に延びている。そして、閉塞板６１は、スライド受容部４０の挿入口４１の内側に嵌合される。閉塞板６１の横方向の中央からは、スライド受容部４０の奥部に向けてロック解除規制嵌合部６２が延び、閉塞板６１の横方向の両端部からは、スライド受容部４０の奥部に向けて１対の補強嵌合部６３，６３が延びている。そして、リテーナー６０を台盤１１に組み付けると、ロック解除規制嵌合部６２が、スライド受容部４０のうちロックアーム４７と天板壁２０と１対の上方支持壁４５，４５に四方を囲まれた空間４０Ａに嵌合挿入され、各補強嵌合部６３，６３が、スライド受容部４０うち上方支持壁４５と天板壁２０と下方支持壁４４と側部枠壁２３又は側部リブ４２とに囲まれた各空間４０Ｂに嵌合挿入される。 A retainer 60, which is a separate component from the base plate 11, is inserted and assembled in the slide receiving portion 40. The retainer 60 is, for example, a synthetic resin injection-molded product, and includes a closing plate 61 at the rear end in the insertion direction. The closing plate 61 has a rectangular shape, and its long side extends in the horizontal direction and its short side extends in the vertical direction. The closing plate 61 is fitted inside the insertion port 41 of the slide receiving portion 40. From the center in the lateral direction of the closing plate 61, the lock release restricting fitting portion 62 extends toward the back of the slide receiving portion 40, and from the both ends in the lateral direction of the closing plate 61 to the back of the slide receiving portion 40. A pair of reinforcing fittings 63, 63 extend toward the end. When the retainer 60 is assembled to the base 11, the lock release restriction fitting portion 62 is surrounded by the lock arm 47, the top plate wall 20, and the pair of upper support walls 45, 45 in the slide receiving portion 40. The space 40 A is fitted and inserted, and each of the reinforcing fitting portions 63 and 63 is surrounded by the upper support wall 45, the top plate wall 20, the lower support wall 44, the side frame wall 23, or the side rib 42 in the slide receiving portion 40. It is inserted into each space 40B.

詳細には、ロック解除規制嵌合部６２は、閉塞板６１から延びた１対の帯板壁６２Ａ，６２Ａの先端部の間及び中間部の間を、帯板状の架橋壁６２Ｂ，６２Ｂで繋いだ構造になっている。各補強嵌合部６３に関しても同様に、閉塞板６１から延びた１対の帯板壁６３Ａ，６３Ａの先端部の間及び中間部の間を、帯板状の架橋壁６３Ｂ，６３Ｂで繋いだ構造になっている。また、図１７に示すように、補強嵌合部６３は、スライド受容部４０の奥行き方向において、そのスライド受容部４０の奥部まで挿入される長さをなす一方、ロック解除規制嵌合部６２は、補強嵌合部６３の約半分の長さとなって、ロックアーム４７の基端部に対応した位置まで挿入される。さらに、図１５に示すように、リテーナー６０の上面においては、ロック解除規制嵌合部６２、補強嵌合部６３及び閉塞板６１が面一になっており、リテーナー６０の下面においては、ロック解除規制嵌合部６２の下面より補強嵌合部６３の下面が下方に位置し、補強嵌合部６３の下面より閉塞板６１の下面が下方に位置している。これらロック解除規制嵌合部６２の下面と補強嵌合部６３の下面との位置の差は、図１９に示すように、例えば、ロックアーム４７の板厚分の差になっている。 Specifically, the lock release restricting fitting portion 62 connects the pair of strip plate walls 62 A and 62 A extending from the closing plate 61 between the tip portions and the middle portion thereof by strip plate-like bridging walls 62 B and 62 B. It has a structure. Similarly, each reinforcing fitting portion 63 has a structure in which a pair of strip plate walls 63A and 63A extending from the closing plate 61 are connected to each other between the tip portions and the middle portion thereof by strip plate-like bridging walls 63B and 63B. It has become. In addition, as shown in FIG. 17, the reinforcing fitting portion 63 has a length inserted to the back of the slide receiving portion 40 in the depth direction of the slide receiving portion 40, while the lock release restricting fitting portion 62. Is about half the length of the reinforcing fitting 63 and is inserted to a position corresponding to the base end of the lock arm 47. Further, as shown in FIG. 15, the lock release restriction fitting portion 62, the reinforcement fitting portion 63 and the closing plate 61 are flush with each other on the upper surface of the retainer 60, and the lock release is on the lower surface of the retainer 60. The lower surface of the reinforcing fitting portion 63 is located below the lower surface of the restriction fitting portion 62, and the lower surface of the closing plate 61 is located below the lower surface of the reinforcing fitting portion 63. The difference in position between the lower surface of the lock release restricting fitting portion 62 and the lower surface of the reinforcing fitting portion 63 is, for example, a difference in the plate thickness of the lock arm 47 as shown in FIG.

図１０に示すように、両補強嵌合部６３，６３における外側の帯板壁６３Ａには、リテーナー係止片６４が備えられている（図１０には、一方の補強嵌合部６３のリテーナー係止片６４のみが示されている）。リテーナー係止片６４は、帯板壁６３Ａのうち閉塞板６１寄り位置に門形のスリットを形成することで、帯板壁６３Ａの一部を突片状に切り離し、その突片の先端に係合突起６５を形成してなる。係合突起６５は、閉塞板６１に向かうに従って徐々に側方へ向かったテーパ面６５Ａと、閉塞板６１と平行な係止面６５Ｂとを備えた矢尻状になっている。そして、スライド受容部４０の側部枠壁２３及び側部リブ４２には、リテーナー６０の各係合突起６５と凹凸係合可能なリテーナー係止孔４９，４９がそれぞれ設けられている。 As shown in FIG. 10, a retainer locking piece 64 is provided on the outer strip plate wall 63A of both the reinforcing fitting portions 63, 63 (FIG. 10 shows a retainer engagement of one reinforcing fitting portion 63. Only the stop 64 is shown). The retainer locking piece 64 forms a gate-shaped slit at a position near the closing plate 61 in the strip plate wall 63A, so that a part of the strip plate wall 63A is cut into a projecting piece shape, and an engagement projection is formed at the tip of the projecting piece. 65 is formed. The engagement protrusion 65 has an arrowhead shape including a tapered surface 65 A that gradually toward the side toward the closing plate 61 and a locking surface 65 B parallel to the closing plate 61. The side frame wall 23 and the side rib 42 of the slide receiving portion 40 are provided with retainer locking holes 49 and 49 that can engage with the engaging protrusions 65 of the retainer 60 in an uneven manner.

本実施形態の台車１０では、キャスター１２の座板１３が台盤１１に以下のようにして組み付けられる。即ち、座板１３をスライド受容部４０における側部枠壁２３と側部リブ４２との間に配置し、座板１３の下面をスライド受容部４０における下方支持壁４４の上面４４Ａに摺接させながら、座板１３をスライド受容部４０に挿入していく。すると、その途中で座板１３の一端部がロックアーム４７におけるロック突部４８のテーパ面４８Ａに摺接して、ロックアーム４７が上方に撓む（図１１参照）。そして、座板１３がスライド受容部４０の奥部まで挿入され、座板１３の一端が奥部リブ４３に隣接したときに座板１３がロック突部４８を通過する。すると、図１２及び図１６に示すよう、ロックアーム４７がその弾発力で復元して、ロック突部４８の係止面４８Ｂが座板１３の縁部に係止する。これにより、座板１３は、奥部リブ４３とロック突部４８と側部リブ４２と側部枠壁２３とにより、水平方向の四方から囲まれて位置決めされる。また、座板１３は、下方支持壁４４，４４と、上方支持壁４５及び上面対向壁４６とによって上下方向で位置決めされかつ支持される。これらにより座板１３が台盤１１に対して全方向に移動不能に固定される。 In the cart 10 of the present embodiment, the seat plate 13 of the caster 12 is assembled to the base 11 as follows. That is, the seat plate 13 is disposed between the side frame wall 23 and the side rib 42 in the slide receiving portion 40, and the lower surface of the seat plate 13 is brought into sliding contact with the upper surface 44 A of the lower support wall 44 in the slide receiving portion 40. Then, the seat plate 13 is inserted into the slide receiving portion 40. Then, one end portion of the seat plate 13 is slidably contacted with the taper surface 48A of the lock projection 48 in the lock arm 47 in the middle, and the lock arm 47 is bent upward (see FIG. 11). Then, the seat plate 13 is inserted to the back of the slide receiving portion 40, and the seat plate 13 passes through the lock protrusion 48 when one end of the seat plate 13 is adjacent to the back rib 43. Then, as shown in FIGS. 12 and 16, the lock arm 47 is restored by its elastic force, and the locking surface 48 B of the lock projection 48 is locked to the edge of the seat plate 13. Thus, the seat plate 13 is positioned by being surrounded by the back rib 43, the lock projection 48, the side rib 42, and the side frame wall 23 from the four sides in the horizontal direction. The seat plate 13 is positioned and supported in the vertical direction by the lower support walls 44, 44, the upper support wall 45 and the upper surface facing wall 46. Thus, the seat plate 13 is fixed to the base plate 11 so as not to move in all directions.

次いで、図１６に示すように、スライド受容部４０にリテーナー６０を組み付ける。そのためには、リテーナー６０をスライド受容部４０における側部枠壁２３と側部リブ４２との間に配置し、リテーナー６０における上面をスライド受容部４０における天板壁２０の下面に摺接させながら、リテーナー６０をスライド受容部４０に挿入していけばよい。すると、リテーナー６０をスライド受容部４０に挿入する途中で、リテーナー６０に備えた係合突起６５，６５のテーパ面６５Ａ（図１０参照）に、スライド受容部４０における挿入口４１の縁部が摺接し、リテーナー係止片６４，６４が内側に撓められる。そして、リテーナー６０の閉塞板６１が挿入口４１の内側に嵌合されたときに、スライド受容部４０のリテーナー係止孔４９，４９に係合突起６５，６５が対面し、リテーナー係止片６４が復元して、係合突起６５，６５がリテーナー係止孔４９，４９に凹凸係合する。これにより、係合突起６５の係止面６５Ｂ（図１０参照）が、リテーナー係止孔４９の内面に対向し、リテーナー６０がスライド受容部４０に抜け止めされる（図１３参照）。以上で、台車１０の組み付け作業が完了する。このようにリテーナー６０は座板１３と同じ方向からスライド受容部４０に挿入組み付けすることができるので、組み付け作業を効率よく行うことができる。なお、上記した作業は、通常は台盤１１の上下を逆さまにして行ってもよい。 Next, as shown in FIG. 16, the retainer 60 is assembled to the slide receiving portion 40. For this purpose, the retainer 60 is disposed between the side frame wall 23 and the side rib 42 in the slide receiving portion 40, and the upper surface of the retainer 60 is slidably contacted with the lower surface of the top wall 20 in the slide receiving portion 40. The retainer 60 may be inserted into the slide receiving portion 40. Then, in the middle of inserting the retainer 60 into the slide receiving portion 40, the edge of the insertion port 41 in the slide receiving portion 40 slides on the tapered surface 65 A (see FIG. 10) of the engaging protrusions 65, 65 provided in the retainer 60. The retainer locking pieces 64 and 64 are bent inward. When the closing plate 61 of the retainer 60 is fitted inside the insertion port 41, the engagement protrusions 65, 65 face the retainer engagement holes 49, 49 of the slide receiving portion 40, and the retainer engagement piece 64. Is restored, and the engaging protrusions 65, 65 engage with the retainer locking holes 49, 49 in an uneven manner. As a result, the locking surface 65B (see FIG. 10) of the engagement protrusion 65 faces the inner surface of the retainer locking hole 49, and the retainer 60 is prevented from coming off the slide receiving portion 40 (see FIG. 13). Thus, the assembly work of the carriage 10 is completed. Thus, since the retainer 60 can be inserted and assembled into the slide receiving portion 40 from the same direction as the seat plate 13, the assembling work can be performed efficiently. In addition, you may perform the above-mentioned operation | work normally upside down the base plate 11. FIG.

組み付けが完了した台車１０では、図１３及び図１７に示すようにリテーナー６０のロック解除規制嵌合部６２が、ロックアーム４７と天板壁２０との間に収まり、ロック解除規制嵌合部６２の両架橋壁６２Ｂ，６２Ｂがロックアーム４７の基端部と先端部を上方から支持する。これにより、ロックアーム４７が上方に押された場合には、ロック解除規制嵌合部６２の架橋壁６２Ｂ，６２Ｂが天板壁２０とロックアーム４７との間で突っ張り状態になり、ロックアーム４７の上方への変形が規制される。即ち、ロックアーム４７による座板１３の係止力が向上する。 In the cart 10 that has been assembled, the lock release restriction fitting portion 62 of the retainer 60 fits between the lock arm 47 and the top plate wall 20 as shown in FIGS. 13 and 17. Both the bridging walls 62B and 62B support the base end portion and the distal end portion of the lock arm 47 from above. As a result, when the lock arm 47 is pushed upward, the bridging walls 62B and 62B of the lock release restricting fitting portion 62 are stretched between the top plate wall 20 and the lock arm 47, and the lock arm 47 The upward deformation is restricted. That is, the locking force of the seat plate 13 by the lock arm 47 is improved.

また、図１４に示すように、リテーナー６０の補強嵌合部６３は、座板１３の両側縁部と天板壁２０との間に挟まれて、上方支持壁４５及び上面対向壁４６（図３参照）と共に座板１３を上方から支持する。これにより、台盤１１にかかる重量が、上方支持壁４５と上面対向壁４６と補強嵌合部６３とに分散されて耐久性が高まる。しかも、本実施形態では、１対の上方支持壁４５，４５と奥部リブ４３と上面対向壁４６と天板壁２０とが互いに接続されて補強し合う箱形構造になっているので、従来より強度アップを図ることができる。そして、この強度アップが図られた部分からロックアーム４７が延長して形成されているから、ロックアーム４７による座板１３の係止が安定する。しかも、座板１３を挟持した下方支持壁４４と補強嵌合部６３とが座板１３を挟んで互いに上下方向で対向した構造になっているので（図１９参照）、従来のように座板の上側と下側との各支持部材が上下方向で互いに対向していない構造のものに比べて（図２８参照）、台盤１１に対する座板１３の固定が安定する。さらに、図１に示すように、リテーナー６０の閉塞板６１が、挿入口４１の内側に収まり、挿入口４１を塞ぐと共に挿入口４１の開口縁を構成する壁部（具体的には、天板壁２０、側部リブ４２（図３参照）、側部枠壁２３及び下方支持壁４４）の内面に隣接して補強することができる。 Further, as shown in FIG. 14, the reinforcing fitting portions 63 of the retainer 60 are sandwiched between both side edges of the seat plate 13 and the top plate wall 20, and the upper support wall 45 and the upper surface facing wall 46 (FIG. 3). And the seat plate 13 is supported from above. Thereby, the weight concerning the base 11 is distributed to the upper support wall 45, the upper surface opposing wall 46, and the reinforcement fitting part 63, and durability improves. Moreover, in the present embodiment, since has become a box-shaped structure a pair of upper support walls 45, 45 and the inner ribs 43 and the upper surface facing the wall 46 and the top plate wall 20 is mutually reinforcing are connected to each other, traditional it is possible to achieve a good Ri strength up. Since the lock arm 47 is formed extending from the portion where the strength is increased, the locking of the seat plate 13 by the lock arm 47 is stabilized. In addition, since the lower support wall 44 sandwiching the seat plate 13 and the reinforcing fitting portion 63 are opposed to each other in the vertical direction with the seat plate 13 sandwiched therebetween (see FIG. 19), the seat plate is conventionally used. As compared with a structure in which the upper and lower support members are not opposed to each other in the vertical direction (see FIG. 28), the seat plate 13 is fixed to the base plate 11 more stably. Further, as shown in FIG. 1, the closing plate 61 of the retainer 60 is housed inside the insertion port 41, closes the insertion port 41, and forms the opening edge of the insertion port 41 (specifically, the top plate wall 20, can be reinforced adjacent to the inner surfaces of the side ribs 42 (see FIG. 3), the side frame wall 23 and the lower support wall 44).

なお、キャスター１２を交換する際には、台盤１１の各リテーナー係止孔４９，４９に工具を差し込んで係合突起６５（図１０参照）をリテーナー係止孔４９から外し、リテーナー６０をスライド受容部４０から抜けばよい。そして、ロックアーム４７の先端を押圧してロックアーム４７による座板１３のロックを解除して、座板１３をスライド受容部４０から外すことができる。これにより、キャスター１２を台盤１１から外すことができ、キャスター１２の交換作業及び台車１０を破棄する場合における材料の分別作業を容易に行うことができる。 When the caster 12 is replaced, a tool is inserted into each retainer locking hole 49, 49 of the base plate 11 to remove the engaging protrusion 65 (see FIG. 10) from the retainer locking hole 49, and the retainer 60 is slid. What is necessary is just to come out of the receiving part 40. Then, the front end of the lock arm 47 is pressed to release the lock of the seat plate 13 by the lock arm 47, and the seat plate 13 can be removed from the slide receiving portion 40. Thereby, the caster 12 can be removed from the base 11, and the work of exchanging the caster 12 and the material separation work when the cart 10 is discarded can be easily performed.

このように本実施形態の台車１０によれば、スライド受容部４０にキャスター１２の座板１３を挿入するだけで座板１３が抜け止めされるので、従来に比べて座板１３を容易に台盤１１に組み付けることができる。しかも、ロックアーム４７は、座板１３の縁部に係止するので座板１３を特殊構造にしなくてもよく、汎用品のキャスター１２を使用することができるので、キャスター１２のコストを従来より抑えることができる。また、ロックアーム４７により座板１３をスライド受容部４０内に抜け止めした状態で、リテーナー６０を台盤１１に組み付けることで、ロックアーム４７の弾性変形が規制され、ロックアーム４７による座板１３の係止力が高まると共に、リテーナー６０の補強嵌合部６３が下方支持壁４４との間でリテーナー６０を上下方向から挟持するので、座板１３が安定する。しかも、座板１３とリテーナー６０とを、台盤１１のスライド受容部４０に対して同じ方向から挿入組み付けすることができるので、組み付け作業を効率よく行うことができる。その上、複数の台車１０をクロス積みした場合に、上下の台車１０，１０を互いの長手方向の中央に容易に位置決めすることができる。また、リテーナー６０の色を台車１０毎異ならせれば、それら色に基づいて、どのような種類の荷物を搬送するための台車１０かを容易に判別することができる。 As described above, according to the carriage 10 of the present embodiment, the seat plate 13 can be prevented from coming off simply by inserting the seat plate 13 of the caster 12 into the slide receiving portion 40. It can be assembled to the board 11. Moreover, since the lock arm 47 is locked to the edge of the seat plate 13, the seat plate 13 does not have to have a special structure, and a general-purpose caster 12 can be used. Can be suppressed. Further, the retainer 60 is assembled to the base plate 11 in a state where the seat plate 13 is prevented from coming off into the slide receiving portion 40 by the lock arm 47, whereby elastic deformation of the lock arm 47 is restricted, and the seat plate 13 by the lock arm 47 is controlled. And the reinforcing fitting portion 63 of the retainer 60 clamps the retainer 60 with the lower support wall 44 from above and below, so that the seat plate 13 is stabilized. Moreover, since the seat plate 13 and the retainer 60 can be inserted and assembled from the same direction with respect to the slide receiving portion 40 of the base plate 11, the assembling work can be performed efficiently. In addition, when a plurality of carriages 10 are cross-stacked, the upper and lower carriages 10 and 10 can be easily positioned at the center in the longitudinal direction of each other. Further, if the color of the retainer 60 is different for each carriage 10, it is possible to easily determine what kind of luggage is to be transported 10 based on those colors.

［第２実施形態］
本実施形態は、図２０及び図２１に示されており、リテーナー５０の構成のみが前記第１実施形態と異なる。以下、第１実施形態のリテーナー６０と相違する構成に関してのみ説明し、第１実施形態と同一の構成に関しては同一符号を付して重複した説明は省略する。 [Second Embodiment]
This embodiment is shown in FIGS. 20 and 21, and only the configuration of the retainer 50 is different from the first embodiment. Hereinafter, only the configuration different from the retainer 60 of the first embodiment will be described, and the same configuration as that of the first embodiment will be denoted by the same reference numerals and redundant description will be omitted.

図２０に示すようにリテーナー５０の各補強嵌合部６３には、その先端下側角部を面取りして嵌合ガイド部６３Ｘが形成されている。また、各補強嵌合部６３のうち閉塞板６１側の基端部の下面からは、基端突部６３Ｙが下方に突出形成されている。 As shown in FIG. 20, each reinforcing fitting portion 63 of the retainer 50 is formed with a fitting guide portion 63 X by chamfering the lower corner portion of the tip. In addition, a base end protrusion 63Y is formed to protrude downward from the lower surface of the base end portion on the closing plate 61 side in each reinforcing fitting portion 63.

リテーナー５０のロック解除規制嵌合部６２には、その先端下側角部を面取りして嵌合ガイド部６２Ｘが形成されている。また、ロック解除規制嵌合部６２を構成する帯板壁６２Ａ，６２Ａの間の中間位置には、それら帯板壁６２Ａと同じ形状の中間壁６２Ｙが形成されている。さらに、リテーナー５０に備えた閉塞板６１には、下方支持壁４４，４４の間に収まるように、下端突部６１Ａが形成されている。 The lock release restricting fitting portion 62 of the retainer 50 is formed with a fitting guide portion 62X by chamfering the lower corner portion at the tip. In addition, an intermediate wall 62Y having the same shape as the band plate wall 62A is formed at an intermediate position between the band plate walls 62A and 62A constituting the lock release restriction fitting portion 62. Further, the closing plate 61 provided in the retainer 50 is formed with a lower end protrusion 61 A so as to fit between the lower support walls 44, 44.

本実施形態の構成によれば、図２１に示すように、リテーナー５０をスライド受容部４０内に挿入する際に、嵌合ガイド部６２Ｘ，６３Ｘがロックアーム４７及び座板１３に摺接して、リテーナー５０がロックアーム４７及び座板１３の上方に案内されるので、リテーナー５０の挿入組み付け作業をスムーズに行うことができる。また、補強嵌合部６３に備えた基端突部６３Ｙが、座板１３よりスライド受容部４０の挿入口４１側で下方支持壁４４の上面に隣接し、補強効果を奏する。さらに、閉塞板６１の下端突部６１Ａが下方支持壁４４，４４の間に収まって、下方支持壁４４，４４の補強及び保護を図ることができる。 According to the configuration of the present embodiment, as shown in FIG. 21, when the retainer 50 is inserted into the slide receiving portion 40, the fitting guide portions 62X and 63X are in sliding contact with the lock arm 47 and the seat plate 13, Since the retainer 50 is guided above the lock arm 47 and the seat plate 13, the inserting and assembling work of the retainer 50 can be performed smoothly. Further, the base end protrusion 63Y provided in the reinforcement fitting portion 63 is adjacent to the upper surface of the lower support wall 44 on the side of the insertion port 41 of the slide receiving portion 40 from the seat plate 13, and has a reinforcing effect. Furthermore, the lower end protrusion 61A of the closing plate 61 is accommodated between the lower support walls 44 and 44, so that the lower support walls 44 and 44 can be reinforced and protected.

［第３実施形態］
本実施形態は、図２２〜図２４に示されており、１対の上方支持壁４５，４５の間に補強リブ５１を備えた点が前記第１実施形態と異なる。具体的には、補強リブ５１は、図２２に示すように、上方支持壁４５，４５の間を２等分する位置に配置され、それら上方支持壁４５，４５と平行になっている。また、補強リブ５１は、図２３及び図２４に示すように、天板壁２０と上面対向壁４６と奥部リブ４３とに接続されると共に、補強リブ５１のうち奥部リブ４３と反対側の一端面が、上面対向壁４６の先端面とほぼ面一になっている。上記構成以外は、第１実施形態と同一であるので重複した説明は省略する。 [Third Embodiment]
This embodiment is shown in FIGS. 22 to 24, and is different from the first embodiment in that a reinforcing rib 51 is provided between a pair of upper support walls 45, 45. Specifically, as shown in FIG. 22, the reinforcing rib 51 is disposed at a position that bisects the space between the upper support walls 45 and 45, and is parallel to the upper support walls 45 and 45. Further, as shown in FIGS. 23 and 24, the reinforcing rib 51 is connected to the top plate wall 20, the upper surface facing wall 46, and the inner rib 43, and of the reinforcing rib 51 on the side opposite to the inner rib 43. One end surface is substantially flush with the tip surface of the upper surface facing wall 46. Since the configuration other than the above is the same as that of the first embodiment, a duplicate description is omitted.

本実施形態の構成によれば、補強リブ５１を設けたことで、台盤１１のうち座板１３と上下方向で当接する部分の強度が向上する。 According to the configuration of the present embodiment, by providing the reinforcing rib 51, the strength of the portion of the base plate 11 that contacts the seat plate 13 in the vertical direction is improved.

［他の実施形態］
本発明は、前記実施形態に限定されるものではなく、例えば、以下に説明するような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。 [Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

（１）前記第１実施形態では、補強嵌合部６３の下面がロック解除規制嵌合部６２の下面より下方に位置して座板１３に隣接配置されていたが、図２５に示すように補強嵌合部６３の下面をロック解除規制嵌合部６２の下面と面一にして、補強嵌合部６３の下面を座板１３から上方に浮かせた構造にしてもよい。 (1) In the first embodiment, the lower surface of the reinforcement fitting portion 63 is located below the lower surface of the lock release restricting fitting portion 62 and is disposed adjacent to the seat plate 13, but as shown in FIG. The bottom surface of the reinforcement fitting portion 63 may be flush with the bottom surface of the lock release restriction fitting portion 62, and the bottom surface of the reinforcement fitting portion 63 may be lifted upward from the seat plate 13.

（２）前記第１実施形態では、スライド受容部４０に対する座板１３とリテーナー６０との挿入口が同じであったが、前記第１実施形態のスライド受容部４０において挿入口４１と直交する方向に挿入口を形成し、そこからリテーナーを挿入する構成にしてもよい。 In (2) the first embodiment, the insertion opening of the seat plate 13 and the retainer 60 relative to the slide receiving portion 40 are the same, the Cartesian and the insertion opening 41 in the slide receiving portion 40 of the first embodiment An insertion port may be formed in the direction, and the retainer may be inserted therefrom.

本発明の第１実施形態に係る台車の斜視図The perspective view of the trolley | bogie which concerns on 1st Embodiment of this invention. 台車の分解斜視図Exploded perspective view of trolley 台盤を下方から見た状態の斜視図Perspective view of the stand as seen from below 複数の台車をクロス積みした状態の斜視図Perspective view of a state in which a plurality of carts are cross-stacked クロス積みされる過程の複数の台車の平面図Top view of multiple trucks in the process of cross-stacking 上下の台車が互いの長手方向の中央に位置決めされた状態の平面図Top view of the state where the upper and lower carts are positioned at the center in the longitudinal direction of each other クロス積みされた複数の台車の側断面図Cross-sectional side view of multiple trolleys cross-stacked 上下の台車が互いの長手方向の中央に位置決めされた状態の側断面図Side sectional view of the state where the upper and lower carts are positioned at the center in the longitudinal direction of each other 上下の台車が互いの長手方向の中央に位置決めされた状態の斜視図Perspective view of the state where the upper and lower carts are positioned at the center in the longitudinal direction of each other スライド受容部からリテーナーを離脱した状態の斜視図A perspective view of the retainer detached from the slide receiving portion スライド受容部に座板を挿入する過程の斜視図Perspective view of the process of inserting the seat plate into the slide receiving part スライド受容部の奥部まで座板を挿入した状態の斜視図A perspective view of a state where the seat plate is inserted to the back of the slide receiving portion ロックアームの変形がリテーナーによって規制された状態の斜視図The perspective view of the state where the deformation of the lock arm is regulated by the retainer 座板の側縁部の上方にリテーナーが位置した状態の斜視図The perspective view in the state where the retainer was located above the side edge of the seat plate 台盤とキャスターとリテーナーとの分解側断面図Exploded side sectional view of base, caster and retainer 台盤のスライド受容部にキャスターの座板を挿入した状態の側断面図Side sectional view with caster seat plate inserted into slide receiving part of base plate 台車のスライド受容部にリテーナーを挿入した状態の側断面図Side sectional view of the carriage with the retainer inserted in the slide receiving part スライド受容部の正断面図Front sectional view of slide receiving part スライド受容部に座板及びリテーナーが挿入された状態の正断面図Front sectional view of the slide receiving part with the seat plate and retainer inserted 第２実施形態のリテーナーの斜視図The perspective view of the retainer of 2nd Embodiment そのリテーナーの側断面図Side view of the retainer 第３実施形態のスライド受容部の正断面図Front sectional view of the slide receiving portion of the third embodiment スライド受容部の側断面図Side sectional view of slide receiving part スライド受容部の側断面図Side sectional view of slide receiving part リテーナーの変形例を示した側断面図Side sectional view showing a variation of the retainer 従来の台車の分解斜視図Exploded perspective view of a conventional cart 従来の台車の側断面図Side view of a conventional cart 従来の台車の正断面図Front sectional view of a conventional cart

Explanation of symbols

１０台車
１１台盤
１２キャスター
１３座板
２０天板壁
２２端部枠壁
２３側部枠壁
２４把持孔（積載位置決孔）
２６，２９脚部
２８位置決突部
４０スライド受容部
４１挿入口
４２側部リブ
４３奥部リブ
４４下方支持壁
４５上方支持壁
４６上面対向壁
４７ロックアーム
４８ロック突部
４９リテーナー係止孔
５０，６０リテーナー
５１補強リブ
６１閉塞板
６２ロック解除規制嵌合部
６２Ｘ，６３Ｘ嵌合ガイド部
６４リテーナー係止片
６５係合突起 10 trolley 11 base 12 caster 13 seat plate 20 top plate wall 22 end frame wall 23 side frame wall 24 gripping hole (loading position determining hole)
26, 29 Leg part 28 Positioning projection part 40 Slide receiving part 41 Insertion slot 42 Side part rib 43 Back part rib 44 Lower support wall 45 Upper support wall 46 Upper surface facing wall 47 Lock arm 48 Lock protrusion 49 Retainer locking hole 50 , 60 Retainer 51 Reinforcing rib 61 Closing plate 62 Unlocking restriction fitting portion 62X, 63X Fitting guide portion 64 Retainer locking piece 65 Engaging protrusion

Claims

In carts with multiple casters attached to a base made of synthetic resin,
The platform is provided with a slide receiving portion into which the seat plate of the caster is inserted from the horizontal direction. The slide receiving portion is slidably contacted with the inserted seat plate and elastically deformed upward, and the seat. When the plate reaches the back of the slide receiving portion, a lock arm is formed that is restored and locked to the edge of the seat plate to prevent the seat plate from being detached , and is horizontally disposed above the lock arm. A cart , comprising: a retainer that is inserted from a direction and restricts elastic deformation of the lock arm upward; and a retainer locking portion for locking the retainer to the base .

The carriage according to claim 1 , wherein both the seat plate and the insertion port of the retainer in the slide receiving part are open to a side surface of the base .

The platform is formed with ribs on the lower surface of the rectangular top plate wall on which the luggage is placed,
The slide receiving portion is disposed at the four corners of the base plate and is closed at the top by the top plate wall, and at the back and both sides by a back rib standing from the bottom surface of the top plate wall and a pair of side ribs. Are closed, and the pair of lower support walls projecting from the lower end edges of the pair of side ribs toward each other to support both side edges of the seat plate from below, A plurality of upper support walls standing from the lower surface and extending in parallel with the side ribs are configured to support the seat plate from above.
3. The carriage according to claim 2 , wherein the lock arm has a cantilever shape having an arrowhead-like lock protrusion at a tip, and is disposed between the adjacent upper support walls .

The retainer is integrally formed at an end portion of the lock release restriction fitting portion that is fitted between the lock arm and the top plate wall, and is a blockage that blocks the insertion port. The cart according to claim 3 , further comprising a plate .

The cart according to claim 4 , wherein the closing plate is fitted inside the insertion port .

A reinforcing fitting portion that is fitted between the seat plate and the top plate wall, faces the lower support wall with the seat plate interposed therebetween, and sandwiches the seat plate is formed integrally with the retainer. The cart according to claim 4 or 5 , wherein

The cart according to any one of claims 4 to 6, wherein a fitting guide portion is formed by chamfering a lower corner portion at a front end of the unlocking restriction fitting portion and / or the reinforcing fitting portion .

A pair of the upper support walls located on both sides of the lock arm are connected to the inner rib, and are opposed to the upper surface that are interposed between the pair of upper support walls and connected to the inner rib. A wall,
The cart according to any one of claims 3 to 7, wherein the lock arm is formed to extend from the upper surface facing wall .

In the retainer locking portion, a retainer locking hole formed through the side rib, and
A cantilever retainer locking piece formed by forming a slit in the reinforcing fitting portion;
The carriage according to any one of claims 3 to 8, further comprising an engagement protrusion formed to protrude from a tip of the retainer engagement piece and engaging with the retainer engagement hole .

The cart according to any one of claims 1 to 9, wherein the retainer is color-coded for each of the carts according to the type of luggage to be loaded .

The platform is rectangular, and a plurality of the carts are configured to be able to be stacked by alternately changing the direction by 90 degrees,
A loading position determination hole opened on the upper surface of the platform;
Formed on the bottom surface of the platform, is in surface contact with the upper surface of the lower cart, and the upper and lower carts are located at the center in the longitudinal direction of the lower cart. A first loading projection to engage;
When the first loading projection comes into surface contact with the upper surface of the lower cart, the first loading projection is lifted from the upper surface of the lower cart, and the first loading projection is formed in the loading position determination hole. A second stacking protrusion that comes into surface contact with the upper surface of the lower cart when engaged in a concave-convex manner;
Stands upward from both side edge portions of the platform, is adjacent to the second loading projection in a state of being floated from the upper surface of the lower cart, and is located on the lower side in the longitudinal center of the upper cart. The upper surface guide wall which maintains the state which positioned the said trolley | bogie and guides the said trolley | bogie of an upper side in the longitudinal direction of the said lower trolley | bogie is provided. Trolley.

  In carts with multiple casters attached to a base made of synthetic resin,
  The platform is rectangular, and a plurality of the carts are configured to be able to be stacked by alternately changing the direction by 90 degrees,
  A loading position determination hole opened on the upper surface of the platform;
  Formed on the bottom surface of the platform, is in surface contact with the upper surface of the lower cart, and the upper and lower carts are located at the center in the longitudinal direction of the lower cart. A first loading projection to engage;
  When the first loading projection comes into surface contact with the upper surface of the lower cart, the first loading projection is lifted from the upper surface of the lower cart, and the first loading projection is formed in the loading position determination hole. A second stacking protrusion that comes into surface contact with the upper surface of the lower cart when engaged in a concave-convex manner;
  Stands upward from both side edge portions of the platform, is adjacent to the second loading projection in a state of being floated from the upper surface of the lower cart, and is located on the lower side in the longitudinal center of the upper cart. An upper surface guide wall for guiding the upper cart in the longitudinal direction of the lower cart while maintaining the position of the cart;
  The platform is provided with a slide receiving portion into which the seat plate of the caster is inserted from the horizontal direction. The slide receiving portion is slidably contacted with the inserted seat plate and elastically deformed upward, and the seat. A cart having a lock arm that is restored when the plate reaches the back of the slide receiving portion and is locked to an edge of the seat plate to prevent the seat plate from coming off.