JP2006076330A

JP2006076330A - Carrier truck

Info

Publication number: JP2006076330A
Application number: JP2004259411A
Authority: JP
Inventors: Yoshio Takahashi; 吉男高橋; Tokiyoshi Wakamatsu; 時美若松; Osamu Yanai; 治矢内
Original assignee: Kanto Jidosha Kogyo KK; Kanto Auto Works Ltd
Current assignee: Kanto Jidosha Kogyo KK; Toyota Motor East Japan Inc
Priority date: 2004-09-07
Filing date: 2004-09-07
Publication date: 2006-03-23

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrier truck having straight moving performance by preventing meandering of the carriage provided with casters at four front and rear corners on a lower face of the carrier truck. <P>SOLUTION: In the carrier truck 1 provided with the casters 2 at the four front and rear corners on the lower face of the carrier truck 1, a guide rail 3 extending in the longitudinal direction is provided on the lower face between the front and rear casters 2. The guide rail 3 slidably guides a fixed wheel 4 provided with a level difference H of a grounding surface with the casters 2. A grounding traveling is performed by the casters 2 always taking an advancing direction of the carrier truck 1 as a front side and the fixed wheel 4 always taking the advancing direction as a rear side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、方向自在車輪であるキャスタを備えたに関するものである。 The present invention relates to a caster that is a directional wheel.

各種の工作物や部品等の運搬するために図４で示すように、台車下面の前後４隅にキャスタ２と前後進駆動ユニット５備えた前後進型の搬送台車１が用いられている。この前後進型の搬送台車１は前後４輪のキャスタ２によって方向性が自在である利便性を有しているが、自動走行での直進の場合には搬送台車１の進行によって後側となるキャスタ２のフラツキにより尻振りによって蛇行し走行誘導線から脱落する。また、前記蛇行による搬送台車１の停止時の台車角度にバラツキが生じて運搬物の自動積み降ろしが困難となる問題点があった。 As shown in FIG. 4, a forward / reverse transport cart 1 having casters 2 and forward / reverse drive units 5 is used at the four front and rear corners of the lower surface of the carriage to transport various workpieces and parts. This forward / reverse transport cart 1 has the convenience of being freely directional by the front and rear four-wheel casters 2, but in the case of straight traveling in automatic traveling, it becomes the rear side due to the progress of the transport cart 1. The caster 2 fluctuates due to the fluttering of the caster 2 and falls off the traveling guide line. In addition, there is a problem in that it is difficult to automatically load and unload a transported object due to variations in the cart angle when the transport cart 1 stops due to the meandering.

また、手押し台車では、走行時の蛇行防止のために、進行方向に対して後側のキャスタの方向自在性を規制するメカストッパを備えた搬送台車が用いられているが、前進方向は直進性が得られるものの戻り時はＵターンさせる必要があり、狭い通路ではＵターンができず、使用には広い通路面積に限られるという問題点があった。
特開平０９−０３９９６９公報特開２００１−１３０２０４公報特開２００１−２３３２１９公報 In addition, in order to prevent meandering during traveling, the hand cart uses a transport cart provided with a mechanical stopper that regulates the directionality of the casters on the rear side with respect to the traveling direction. Although it is necessary to make a U-turn when returning, a U-turn cannot be made in a narrow passage, and there is a problem that the use is limited to a wide passage area.
Japanese Patent Laid-Open No. 09-039696 JP 2001-130204 A JP 2001-233219 A

本発明の目的は、台車下面の前後４隅にキャスタを備えた搬送台車の蛇行を防止し台車に直進性を持たせた搬送台車を提供することである。 An object of the present invention is to provide a transport carriage that prevents the meandering of the transport carriage provided with casters at the four front and rear corners of the bottom face of the carriage, and that makes the carriage straight.

上記の目的を達成するための本発明は、請求項１に記載の通り、台車下面の前後４隅にキャスタを備えた搬送台車において、前記前後のキャスタ間の台車下面に前後方向に延在するガイドレールを設け、このガイドレールに前記キャスタとの接地面のレベル差を設けるようにして固定車輪をスライド可能に案内し、常に搬送台車の進行方向が前側となるキャスタと後側となる前記固定車輪とにて接地走行するようにしたことを特徴とするものである。 In order to achieve the above object, according to the first aspect of the present invention, in the transport cart provided with casters at the four front and rear corners of the bottom surface of the carriage, the bottom surface of the cart between the front and rear casters extends in the front-rear direction. A guide rail is provided, and a fixed wheel is slidably guided so as to provide a level difference between the grounding surface and the caster on the guide rail, and the fixed state where the traveling direction of the transport carriage is always the front side and the rear side is fixed. It is characterized in that the vehicle runs on the ground with wheels.

本発明によると、搬送台車の前後進何れにおいても、搬送台車の進行方向により後側となるキャスタ側に固定車輪がガイドレールを介してスライドして近接し、台車の蛇行を発生させるする後側のキャスタを前記固定車輪との接地面のレベル差によって接地面から浮上させ、後側にスライドした固定車輪と前側のキャスタとによって台車の蛇行を防止した状態で走行が得られる効果を有している。 According to the present invention, in either forward or backward movement of the transport carriage, the fixed wheel slides close to the caster side, which is the rear side depending on the traveling direction of the transport carriage, through the guide rail, and generates the meandering of the carriage. The caster is lifted from the grounding surface due to the level difference of the grounding surface with the fixed wheel, and has an effect that traveling can be obtained in a state in which the meandering of the carriage is prevented by the fixed wheel sliding to the rear side and the front caster. Yes.

以下本発明を実施するための最良の形態について図面に基づいて説明する。図１及び図２において、１は搬送台車であり、台車下面の前後４隅には方向自在車輪であるキャスタ２を備えている。 The best mode for carrying out the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a transport carriage, which includes casters 2 that are directional wheels at four front and rear corners of the bottom face of the carriage.

本発明は、前記前後のキャスタ２間の台車下面に前後方向に延在するガイドレール３を設け、このガイドレール３に前記キャスタ２との接地面のレベル差Ｈを設けるようにして固定車輪４をスライド可能に案内したものである。尚、キャスタ２と固定車輪４との接地面のレベル差Ｈを設けるための手段としては、例えば、固定車輪４の径をキャスタ２より少し大きくしたり、固定車輪４のとキャスタ２とを同径とし、固定車輪４を案内するガイドレール３の取り付け高さ位置を調整する等である。 In the present invention, a guide rail 3 extending in the front-rear direction is provided on the lower surface of the carriage between the front and rear casters 2, and the fixed wheel 4 is provided such that a level difference H of the ground contact surface with the caster 2 is provided on the guide rail 3. Is slidably guided. As a means for providing the level difference H of the ground contact surface between the caster 2 and the fixed wheel 4, for example, the diameter of the fixed wheel 4 is made slightly larger than the caster 2, or the fixed wheel 4 and the caster 2 are made the same. For example, the mounting height position of the guide rail 3 for guiding the fixed wheel 4 is adjusted.

前記ガイドレール３は、固定車輪４のスライド性を良好にするために、例えば、商品名ＬＭガイドの直線移動用のボールベアリング構造によるものが好ましい。 The guide rail 3 preferably has a ball bearing structure for linear movement of a trade name LM guide, for example, in order to improve the slidability of the fixed wheel 4.

本発明は、手押しの搬送台車でもよいが図示のように前後進駆動ユニット５備えた搬送台車１に適用することが効果的である。 The present invention may be a hand-carried transport cart, but is effectively applied to the transport cart 1 provided with the forward / reverse drive unit 5 as shown in the figure.

上記の構造よりなる本発明の動作について図２及び図３に基づいて説明する。図２は搬送台車１の後進時を示す。この場合、図２において搬送台車１の右側を前方にして進行することになる。そこで、搬送台車１の右側を前方にして進行することにより固定車輪４はガイドレール３に案内されて搬送台車１の左側である進行方向に対して後側となるキャスタ２側にスライドして、そのキャスタ２に近接して位置する。 The operation of the present invention having the above structure will be described with reference to FIGS. FIG. 2 shows the reverse of the transport cart 1. In this case, the process proceeds with the right side of the transport carriage 1 in FIG. Therefore, the fixed wheel 4 is guided to the guide rail 3 by moving forward with the right side of the transport carriage 1 forward, and slides to the caster 2 side which is the rear side with respect to the traveling direction on the left side of the transport carriage 1, Located close to the caster 2.

固定車輪４が近接した後側となるキャスタ２は、図１で示すように、キャスタ２を接地面から例えば、５ｍｍほどのレベル差Ｈで浮上させる。 As shown in FIG. 1, the caster 2 on the rear side where the fixed wheel 4 comes close floats the caster 2 from the ground surface with a level difference H of about 5 mm, for example.

これにより、搬送台車１は進行方向に対して後側の固定車輪４と前側のキャスタ２とによって進行するが、搬送台車１の進行方向に対して後側のキャスタ２は接地面から浮上しているためフラツキによる尻振り現象がなくなり搬送台車１の蛇行を防止して走行するのである。 As a result, the transport carriage 1 is advanced by the fixed wheel 4 on the rear side and the caster 2 on the front side with respect to the traveling direction, but the rear caster 2 is levitated from the ground surface with respect to the travel direction of the transport carriage 1. Therefore, the tail swing phenomenon due to fluttering disappears, and the carriage 1 travels while preventing meandering.

図３は搬送台車１の前進時を示す。この場合、図３において搬送台車１の左側を前方にして進行することになる。この搬送台車１の左側を前方にして進行することにより固定車輪４はガイドレール３に案内されて搬送台車１の右側である進行方向に対して後側となるキャスタ２側にスライドして、そのキャスタ２に近接して位置する。 FIG. 3 shows the forward state of the transport carriage 1. In this case, the vehicle travels with the left side of the transport carriage 1 in FIG. The fixed wheel 4 is guided by the guide rail 3 by moving forward with the left side of the transport carriage 1 forward, and slides toward the caster 2 side which is the rear side with respect to the traveling direction which is the right side of the transport carriage 1. Located close to the caster 2.

これにより、前述のように、固定車輪４が近接した後側となるキャスタ２は、図１で示すように、キャスタ２を接地面から例えば、５ｍｍほどのレベル差Ｈで浮上させ、後側のキャスタ２のフラツキによる尻振り現象がなくなり搬送台車１の蛇行を防止して走行するのである。 As a result, as described above, the caster 2 on the rear side to which the fixed wheel 4 comes close, as shown in FIG. 1, floats the caster 2 from the ground surface with a level difference H of about 5 mm, for example. The tail swing phenomenon due to the fluttering of the casters 2 is eliminated, and the conveyance cart 1 is prevented from meandering and travels.

このように本発明は、前後進時における搬送台車１の蛇行を防止するため、走行誘導線から脱落を阻止し、搬送台車１の停止時の台車角度にバラツキがなくなり運搬物の自動積み降ろしが容易となる。また、戻り時の搬送台車１のＵターンも不要となる。 As described above, the present invention prevents the carriage 1 from meandering during forward and backward travel, prevents the carriage from dropping off from the traveling guide line, and the carriage angle when the carriage 1 is stopped does not vary, so that the loaded material can be automatically unloaded. It becomes easy. Further, the U-turn of the transport cart 1 at the time of return is not necessary.

このような格別な作用効果を有する本発明は、簡単な構造のスライド式固定車輪を追加するだけで実現できるため、在来の搬送台車にも低コストで装備することができる。 Since the present invention having such special effects can be realized simply by adding a sliding fixed wheel having a simple structure, it can be mounted on a conventional transport carriage at low cost.

本発明の搬送台車の側面図Side view of the transport cart of the present invention 本発明の搬送台車の後進時の底面図Bottom view of the transport cart of the present invention during reverse travel 本発明の搬送台車の前進時の側面図The side view at the time of advance of the conveyance cart of the present invention 従来の搬送台車の平面図Plan view of a conventional transport cart

Explanation of symbols

１搬送台車
２キャスタ
３ガイドレール
４固定車輪
５前後進駆動ユニット 1 Carriage Cart 2 Casters 3 Guide Rails 4 Fixed Wheels 5 Forward / Reverse Drive Unit

Claims

In the transport cart provided with casters at the four front and rear corners of the bottom surface of the carriage, a guide rail extending in the front-rear direction is provided on the bottom surface of the carriage between the front and rear casters, and a level difference between the ground plane and the caster is provided on the guide rail. In this way, the fixed carriage is guided so as to be slidable, and the carriage is always grounded by the caster whose forward direction is the forward direction and the fixed wheel which is the rear side.