JP5115861B2 - Driving device for transport cart - Google Patents

Driving device for transport cart Download PDF

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JP5115861B2
JP5115861B2 JP2009051536A JP2009051536A JP5115861B2 JP 5115861 B2 JP5115861 B2 JP 5115861B2 JP 2009051536 A JP2009051536 A JP 2009051536A JP 2009051536 A JP2009051536 A JP 2009051536A JP 5115861 B2 JP5115861 B2 JP 5115861B2
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shaft
screw shaft
shaft portion
screw
bearing
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JP2010202098A (en
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光昭 鍋田
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Daifuku Co Ltd
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Description

本発明は、搬送台車の走行経路に沿って支承されたスクリューシャフトと当該スクリューシャフトに係合するように搬送台車に軸支された従動ローラーとを使用する搬送台車の駆動装置に関するものである。   The present invention relates to a drive device for a transport carriage that uses a screw shaft supported along a travel path of the transport carriage and a driven roller that is supported by the transport carriage so as to be engaged with the screw shaft.

上記のようなスクリューシャフト利用の搬送台車駆動装置は、例えば特許文献1などによって従来種々の構成のものが知られている。この特許文献1に記載されるように、スクリューシャフトの送りピッチが一定の場合には、当該スクリューシャフトの軸方向に間隔を隔てて2つの従動ローラーを搬送台車側に設けることができる。この結果、スクリューシャフト単体間の中間軸受けによって当該スクリューシャフトの軸方向の中間位置に従動ローラーが係合できない空間部が存在しても、前後何れかの従動ローラーがスクリューシャフトに係合することにより、搬送台車を連続的に一定速度で推進駆動されることができる。一方、同上特許文献1にも記載されるように、スクリューシャフトに送りピッチが異なる複数の区間を設けて、搬送台車の走行速度を区間ごとに変える場合には、前後2つの従動ローラーが異なる送りピッチのスクリューシャフト区間に係合する不都合を避けるために、搬送台車側の従動ローラーは1つにしなければならない。この場合には、スクリューシャフトの軸方向の中間位置に従動ローラーが係合できない空間部が存在しないように、スクリューシャフト単体間の中間軸受けが不要な1本の長尺スクリューシャフトを構成しなければならない。   Conventionally, for example, Patent Document 1 and the like have been known as such conveying cart driving devices using a screw shaft. As described in Patent Document 1, when the feed pitch of the screw shaft is constant, two driven rollers can be provided on the conveying carriage side with an interval in the axial direction of the screw shaft. As a result, even if there is a space where the driven roller cannot engage with the intermediate position in the axial direction of the screw shaft due to the intermediate bearing between the screw shafts alone, either the front or rear driven roller is engaged with the screw shaft. The transport cart can be continuously driven at a constant speed. On the other hand, as described in Patent Document 1 above, when a plurality of sections with different feed pitches are provided on the screw shaft and the traveling speed of the transport carriage is changed for each section, the two front and rear driven rollers have different feeds. In order to avoid the inconvenience of engaging the screw shaft section of the pitch, the number of driven rollers on the transport carriage side must be one. In this case, one long screw shaft that does not require intermediate bearings between the screw shafts alone should be configured so that there is no space where the driven roller cannot be engaged with the intermediate position in the axial direction of the screw shaft. Don't be.

特開平9−58463号公報Japanese Patent Laid-Open No. 9-58463

しかしながら、両端でのみ軸支することができる長尺スクリューシャフトの長さは、強度や製造面で制限される。即ち、実際には、複数本のスクリューシャフト単体を中間軸受けにより同心状に接続して長尺のスクリューシャフトを構成することになるので、スクリューシャフト単体間に軸受けのための空間が存在することは避けられない。従って従来は、このスクリューシャフト間での従動ローラーの乗り移りのために、乗り移り専用のスクリューシャフトと従動ローラーとを、横側方に位置をずらして並設することが考えられたが、構造が複雑で大幅なコストアップを免れない。   However, the length of the long screw shaft that can be supported only at both ends is limited in terms of strength and manufacturing. In other words, in practice, a plurality of screw shafts are concentrically connected by an intermediate bearing to form a long screw shaft, so there is a space for bearings between the screw shafts alone. Inevitable. Therefore, in the past, in order to transfer the driven roller between the screw shafts, it was considered that the screw shaft dedicated to the transfer and the driven roller were arranged side by side while being shifted in the lateral direction. Inevitably a significant cost increase.

本発明は、上記のような問題点を解決することのできるスクリューシャフト利用の駆動装置を提案するものであって、請求項1に記載の本発明の駆動装置は、後述する実施形態の参照符号を付して示すならば、搬送台車1の走行経路2に沿ってモーター5で駆動されるスクリューシャフト3が支承され、搬送台車1には、前記スクリューシャフト3に係合する従動ローラーが軸支された搬送台車の駆動装置において、前記スクリューシャフト3は、複数本のスクリューシャフト単体9A,9Bを中間軸受け12Aにより同心状に連結して構成され、搬送台車1には、前記スクリューシャフト3を軸方向から見たときに前記中間軸受け12Aの当該スクリューシャフト3から延出する支持部38のある側とは反対側で、当該スクリューシャフト3の軸心に対して直交する回転軸心20aの周りに揺動自在に軸支された可動体16が設けられ、この可動体16に従動ローラー17A〜17Cが、前記スクリューシャフト3を軸方向から見たときに、前記中間軸受け12Aの当該スクリューシャフト3から延出する支持部38を含まない周方向領域内のスクリューシャフト3の羽根板14に沿った周方向少なくとも3箇所にそれぞれ軸支され、前記中間軸受け12Aの両側のスクリューシャフト単体9A,9B間を前記3つの従動ローラー17A〜17Cが相対的に順次通過するとき、常に2つの従動ローラーがスクリューシャフト3の羽根板14に係合するように構成されている。   The present invention proposes a drive device using a screw shaft that can solve the above-described problems, and the drive device according to the first aspect of the present invention is a reference numeral of an embodiment described later. The screw shaft 3 driven by the motor 5 is supported along the travel path 2 of the transport carriage 1, and a driven roller that engages the screw shaft 3 is pivotally supported on the transport carriage 1. In the transporting carriage driving apparatus, the screw shaft 3 is configured by concentrically connecting a plurality of screw shafts 9A and 9B by an intermediate bearing 12A. The screw shaft on the opposite side of the intermediate bearing 12A from the side where the support portion 38 extends from the screw shaft 3 when viewed from the direction. A movable body 16 pivotally supported around a rotational axis 20a orthogonal to the axis of the movable body 16 is provided, and follower rollers 17A to 17C of the movable body 16 move the screw shaft 3 from the axial direction. When viewed, the intermediate bearing 12A is pivotally supported at at least three locations in the circumferential direction along the blade plate 14 of the screw shaft 3 in the circumferential region not including the support portion 38 extending from the screw shaft 3; When the three driven rollers 17A to 17C pass through the screw shafts 9A, 9B on both sides of the intermediate bearing 12A relatively sequentially, the two driven rollers are always engaged with the blade plate 14 of the screw shaft 3. It is configured.

上記の本発明による搬送台車の駆動装置を実施する場合、前記周方向3つの従動ローラー17A〜17Cは、それぞれスクリューシャフト3の羽根板14間に遊嵌する1つのローラー単体から構成することもできるが、請求項2に記載のように、前記周方向3つの従動ローラー17A〜17Cのそれぞれは、スクリューシャフト3の羽根板14を挟む一対のローラー単体21から構成するのが望ましい。又、請求項3に記載のように、前記可動体16は、軸支される前記3つの従動ローラー17A〜17Cがスクリューシャフト3の羽根板14に沿って並ぶ初期位置に付勢手段(実施形態では捩じりコイルスプリング32を使用しているが、他のスプリングやゴムなどの弾性材で構成することもできる)により付勢保持することができる。   In the case of carrying out the driving device for the transport carriage according to the present invention, the three driven rollers 17A to 17C in the circumferential direction can each be constituted by a single roller loosely fitted between the blade plates 14 of the screw shaft 3. However, as described in claim 2, each of the three circumferentially driven rollers 17 </ b> A to 17 </ b> C is preferably composed of a pair of roller single bodies 21 that sandwich the blade plate 14 of the screw shaft 3. According to a third aspect of the present invention, the movable body 16 includes a biasing means (an embodiment) at an initial position where the three driven rollers 17A to 17C are axially supported along the blade plate 14 of the screw shaft 3. The torsion coil spring 32 is used, but it can be biased and held by another spring or an elastic material such as rubber.

又、請求項4に記載のように、前記3つの従動ローラー17A〜17Cは、前記スクリューシャフト3を軸方向から見たときに、前記可動体16の回転軸心20aの位置と、当該回転軸心20aの位置からそれぞれ正逆両方向にほぼ90度離れた位置とに配設することができる。   Further, as described in claim 4, the three driven rollers 17 </ b> A to 17 </ b> C include the position of the rotation axis 20 a of the movable body 16 and the rotation shaft when the screw shaft 3 is viewed from the axial direction. It can be arranged at a position approximately 90 degrees away from the position of the center 20a in both forward and reverse directions.

更に、請求項5に記載のように、前記中間軸受け12Aの支持部38は、軸受け本体37の軸心方向の幅よりも薄く且つスクリューシャフト3の軸心方向に対し直交する向きの板材で構成し、この中間軸受け12Aの支持部38からスクリューシャフト3の軸心方向に突出する軸受け本体37に、スクリューシャフト単体9A,9Bの筒状端部13a,13bが被さるように構成することができる。この場合、請求項6に記載のように、前記中間軸受け12Aの軸受け本体37に筒状端部13bが被さるスクリューシャフト単体であって、前記中間軸受け12Aの少なくとも片側に位置するスクリューシャフト単体9Bは、前記軸受け本体37から突出し且つ反対側のスクリューシャフト単体9Aと一体に回転する伝動軸42に対して軸心方向に嵌脱自在に取り付けられる端軸部43と、一端が次の軸受け12Bで支承される長尺の本体軸部45と、この本体軸部45と前記端軸部43とを繋ぐ中継軸部44とから構成し、前記中継軸部44は、前記本体軸部45と前記端軸部43とに対してスクリューシャフト3の軸心方向に対し半径方向に嵌脱自在に取り付けることができる。   Furthermore, as described in claim 5, the support portion 38 of the intermediate bearing 12 </ b> A is made of a plate material that is thinner than the width of the bearing body 37 in the axial direction and orthogonal to the axial direction of the screw shaft 3. The cylindrical shaft portions 13a and 13b of the screw shafts 9A and 9B can be covered with the bearing body 37 protruding in the axial direction of the screw shaft 3 from the support portion 38 of the intermediate bearing 12A. In this case, as described in claim 6, the screw shaft single body 9B, which is covered with the cylindrical end portion 13b on the bearing main body 37 of the intermediate bearing 12A, is located on at least one side of the intermediate bearing 12A. An end shaft portion 43 that protrudes from the bearing main body 37 and is rotatably attached to and disengaged in the axial direction with respect to the transmission shaft 42 that rotates integrally with the screw shaft unit 9A on the opposite side, and one end supported by the next bearing 12B. And a relay shaft portion 44 that connects the main body shaft portion 45 and the end shaft portion 43. The relay shaft portion 44 includes the main body shaft portion 45 and the end shaft. It can attach to the part 43 so that it can fit in and remove in the radial direction with respect to the axial direction of the screw shaft 3.

上記請求項6に記載の構成を採用する場合、請求項7に記載のように、前記伝動軸42には、前記端軸部43から前記中継軸部44の方に突出する回転伝達用端部42gを設け、前記本体軸部45には、前記中継軸部44の方に同心状に突出する回転伝達用突出軸部50aを設け、前記中継軸部44の両端には、前記伝動軸42の回転伝達用端部42gと前記本体軸部45の回転伝達用突出軸部50aとに対して半径方向に嵌脱自在な回転伝達用凹窪部47a,48aを設け、これら両端の回転伝達用凹窪部47a,48aが前記伝動軸42の回転伝達用端部42gと前記本体軸部45の回転伝達用突出軸部50aとに嵌合した中継軸部44の両端を、前記伝動軸42の回転伝達用端部42gと前記本体軸部45の回転伝達用突出軸部50aとに固定する固定具(ボルトナット51a〜53b)を設けることができる。   In the case of adopting the configuration according to claim 6, as described in claim 7, the transmission shaft 42 has a rotation transmission end portion protruding from the end shaft portion 43 toward the relay shaft portion 44. 42g is provided, and the main shaft 45 is provided with a rotation transmission projecting shaft 50a concentrically projecting toward the relay shaft 44, and at both ends of the relay shaft 44, the transmission shaft 42 is provided. Rotation transmitting recesses 47a and 48a are provided in the rotation transmitting end portion 42g and the rotation transmitting protruding shaft portion 50a of the main body shaft portion 45 so as to be detachable in the radial direction. Rotation of the transmission shaft 42 is performed at both ends of the relay shaft portion 44 in which the recess portions 47a and 48a are fitted to the rotation transmission end portion 42g of the transmission shaft 42 and the rotation transmission protruding shaft portion 50a of the main body shaft portion 45. The transmission end portion 42g and the rotation transmission protruding shaft portion 50a of the main body shaft portion 45. It can be provided a fastener for fixing (bolts and nuts 51A~53b) to.

本発明の搬送台車の駆動装置は、スクリューシャフトをモーター駆動により回転駆動することにより、当該スクリューシャフトの羽根板に係合する3つの従動ローラーを介して搬送台車に所定向きの推力が作用し、搬送台車を所定向きに所定速度で走行させることができるのであるが、請求項1に記載の本発明の構成を実施する場合、中間軸受けの両側のスクリューシャフト単体間の隙間の羽根板に沿った周方向の間隔が、スクリューシャフトの羽根板に沿った周方向に並ぶ3つの従動ローラー間の羽根板に沿った方向の間隔(従動ローラー間の間隔が等しくないときは最小間隔)よりも小さくなるように構成しさえすれば、前記3つの従動ローラーの内の2つが中間軸受けの両側のスクリューシャフト単体間の隙間に嵌まり込むことは無い。   In the drive device for the transport carriage of the present invention, a thrust in a predetermined direction acts on the transport cart via three driven rollers that engage with the blades of the screw shaft by rotating the screw shaft by motor drive. The transport carriage can be driven in a predetermined direction and at a predetermined speed. However, when the configuration of the present invention according to claim 1 is carried out, the conveyance carriage is arranged along the vane between the screw shafts on both sides of the intermediate bearing. Spacing in the circumferential direction is smaller than the spacing in the direction along the blades between the three driven rollers arranged in the circumferential direction along the blades of the screw shaft (the minimum spacing when the distances between the driven rollers are not equal). As long as it is configured in this way, two of the three driven rollers will not fit into the gap between the screw shafts on both sides of the intermediate bearing.

即ち、請求項1に記載の本発明の構成によれば、中間軸受けの両側のスクリューシャフト単体間を搬送台車側の3つの従動ローラーが相対的に順次通過するとき、常に2つの従動ローラーが、上手側スクリューシャフト単体の羽根板、又は当該隙間の両側のスクリューシャフトの羽根板に跨がって、若しくは下手側スクリューシャフト単体の羽根板に係合するように、前記スクリューシャフト単体間の間隔を狭めておくだけで、当該中間軸受けの両側のスクリューシャフト単体間の隙間を上手側から下手側へ従動ローラーが相対的に通過移動するときに、当該スクリューシャフト単体間の隙間には常に1つの従動ローラーのみが入り込むことになり、このスクリューシャフト単体間の隙間に入り込んだ1つの従動ローラーの位置を、他の2つの従動ローラーと羽根板との係合により定位置に保持し、下手側のスクリューシャフト単体の羽根板に円滑且つ確実に係合させることができる。   That is, according to the configuration of the present invention described in claim 1, when the three driven rollers on the conveyance carriage side sequentially pass between the screw shafts on both sides of the intermediate bearing, the two driven rollers are always always The spacing between the screw shafts is so set as to straddle the blades of the upper screw shaft alone, the blades of the screw shaft on both sides of the gap, or to engage the blades of the lower screw shaft alone. Just by narrowing, when the driven roller relatively moves from the upper side to the lower side through the gap between the screw shafts on both sides of the intermediate bearing, there is always one driven in the gap between the screw shafts. Only the roller will enter, and the position of one driven roller that has entered the gap between this screw shaft alone will be the other two Held in position by the engagement of the driven roller and the vane can be engaged smoothly and securely engaged with the slats of the screw shaft single downstream side.

従って、中間軸受けで端部が支持される複数のスクリューシャフト単体でスクリューシャフトを構成しても、1本の連続した長尺スクリューシャフトを使用しているときと変わりなく、搬送台車を円滑に走行させることができる。しかも、スクリューシャフト単体間の乗り移り区間に、乗り移り専用のスクリューシャフトと当該乗り移り専用のスクリューシャフトに係合する乗り移り専用の従動ローラーを追加する必要はなく、大幅なコストダウンを図ることができる。又、前記3つの従動ローラーが軸支された可動体が回転軸心の周りで羽根板ピッチに応じた角度に揺動することができるものであるから、羽根板ピッチが異なる区間をスクリューシャフトに設けて、搬送台車の走行速度を区間ごとに変えることも可能である。勿論、この場合には、羽根板ピッチが異なる2つの区間の間には、スクリューシャフトの複数回の回転で羽根板ピッチが変化し終わるように、単位回転角に対する羽根板ピッチの変化量を極小さくすると共に、各従動ローラーと羽根板との間には適度な遊び空間を持たせることが必要である。   Therefore, even if the screw shaft is composed of a plurality of screw shafts whose ends are supported by the intermediate bearings, the conveyance cart runs smoothly as it is when using one continuous long screw shaft. Can be made. In addition, there is no need to add a transfer-specific screw shaft and a transfer-dedicated driven roller that engages with the transfer-specific screw shaft in the transfer section between the screw shafts alone, and a significant cost reduction can be achieved. Further, since the movable body on which the three driven rollers are pivotally supported can swing around the rotation axis at an angle corresponding to the blade plate pitch, sections having different blade plate pitches can be used as screw shafts. It is also possible to change the traveling speed of the transport carriage for each section. Of course, in this case, between two sections with different blade pitches, the amount of change in the blade pitch with respect to the unit rotation angle is extremely set so that the blade pitch is completely changed by multiple rotations of the screw shaft. In addition to reducing the size, it is necessary to provide an appropriate play space between each driven roller and the blade.

尚、前記周方向3つの従動ローラーは、それぞれスクリューシャフトの羽根板間に遊嵌する1つのローラー単体から構成することもできるが、請求項2に記載の構成によれば、従動ローラーを挟む2列一組の羽根板を1列の羽根板に置き換えてスクリューシャフトを構成できるので、スクリューシャフトそのものも軽量且つ安価に構成できる。   In addition, although the said three circumferential direction driven rollers can also be comprised from the one roller single-piece | unit fitted loosely between the blades of a screw shaft, respectively, according to the structure of Claim 2, it sandwiches a driven roller 2 Since the screw shaft can be configured by replacing one row of blade plates with one row of blade plates, the screw shaft itself can also be configured to be lightweight and inexpensive.

前記3つの従動ローラーを軸支する可動体は、基本的には、各従動ローラーがスクリューシャフトの羽根板と係合することにより、回転軸心の周りでの角度(姿勢)が決まるので、当該可動体を特定の角度(姿勢)にスプリングで付勢保持する必要はないが、特に請求項3に記載の構成によれば、各従動ローラーと羽根板との間の遊び空間で従動ローラーががたつくことによる異音の発生を抑制できると共に、可動体(従動ローラー)が回転軸心の周りでフリーである場合よりも、スクリューシャフトを備えた走行経路内へ搬送台車を導入させる場合の作業が容易に行なえる。   The movable body that pivotally supports the three driven rollers basically has an angle (attitude) around the rotation axis determined by each driven roller engaging with a blade plate of the screw shaft. Although it is not necessary to urge and hold the movable body with a spring at a specific angle (posture), in particular, according to the configuration of claim 3, the driven roller rattles in the play space between each driven roller and the blade plate. This makes it possible to suppress the generation of abnormal noise and to facilitate the operation of introducing the transport carriage into the travel route with the screw shaft, compared to the case where the movable body (driven roller) is free around the rotation axis. It can be done.

又、請求項4に記載の構成によれば、3つの従動ローラー間のスクリューシャフトの羽根板に沿った周方向の間隔(角度)を最大にすることができるので、スクリューシャフト単体間に許容される隙間を大きくすることができ、スクリューシャフト単体間の中間軸受けの支持部の厚さを極端に薄くする必要がなくなり、中間軸受けによる支持強度を高めることができる。   Further, according to the configuration described in claim 4, since the circumferential interval (angle) along the blade shaft of the screw shaft between the three driven rollers can be maximized, it is allowed between the screw shafts alone. It is not necessary to extremely reduce the thickness of the support portion of the intermediate bearing between the screw shafts alone, and the support strength by the intermediate bearing can be increased.

スクリューシャフト単体間の中間軸受け構造は特に限定されるものではないが、請求項5に記載の構成によれば、スクリューシャフト単体間の隙間から延出する支持部のスクリューシャフト軸心方向の厚さを薄くするだけで、両側のスクリューシャフト単体を支承する軸受け本体には、スクリューシャフト軸心方向に必要十分な長さを有するものが採用できる。換言すれば、軸受け本体には、スクリューシャフト単体の筒状端部内に遊嵌できる程度の直径のものであれば、従来の一般的な軸受け本体が活用できる。   The intermediate bearing structure between the single screw shafts is not particularly limited, but according to the configuration of claim 5, the thickness of the support portion extending from the gap between the single screw shafts in the axial direction of the screw shaft. As the bearing body for supporting the screw shafts on both sides simply by reducing the thickness, one having a necessary and sufficient length in the axial direction of the screw shaft can be adopted. In other words, a conventional general bearing body can be used as long as the bearing body has a diameter that can be loosely fitted into the cylindrical end of the screw shaft alone.

上記請求項5に記載の構成を採用する場合、請求項6に記載の構成によれば、スクリューシャフト単体を組み付けるとき、中間軸受けの軸受け本体から突出する伝動軸に端軸部を軸心方向に嵌合して取り付けることにより当該端軸部の筒状端部を前記軸受け本体に被せ、次に長尺の本体軸部の一端を、当該本体軸部の一端から同心状に突設された軸部を他方の軸受け(中間軸受け又は端部軸受け)に軸心方向に差し込むなどして支持させ、最後に中継軸部を、前記端軸部と本体軸部の他端との間に半径方向に嵌合して取り付けることができる。又、必要に応じて、この作業手順とは逆の手順でスクリューシャフト単体を両側の軸受けから取り外すこともできる。このように、少なくとも一端の筒状端部を中間軸受けの軸受け本体に対して軸心方向に被せる必要のあるスクリューシャフト単体でありながら、その両端を支承する軸受けの少なくとも一方をスクリューシャフト単体と一体に組み付け取り外ししなければならない場合と比較して、スクリューシャフト単体の組み付け取り外しが簡単容易に行なえる。   When the configuration described in claim 5 is adopted, according to the configuration described in claim 6, when assembling the screw shaft alone, the end shaft portion is axially aligned with the transmission shaft protruding from the bearing body of the intermediate bearing. By fitting and attaching, the cylindrical end portion of the end shaft portion is put on the bearing main body, and then one end of the long main body shaft portion is projected concentrically from one end of the main body shaft portion. To the other bearing (intermediate bearing or end bearing) in the axial direction, etc., and finally, the relay shaft portion is placed between the end shaft portion and the other end of the main body shaft portion in the radial direction. Can be fitted and attached. Further, if necessary, the screw shaft alone can be removed from the bearings on both sides by a procedure reverse to this work procedure. In this way, at least one of the bearings that support both ends of the screw shaft is integral with the screw shaft alone, although it is necessary to cover at least one cylindrical end portion in the axial direction with respect to the bearing body of the intermediate bearing. Compared with the case where it is necessary to assemble and remove the screw shaft, the assembly and removal of the single screw shaft can be performed easily and easily.

更に、請求項6に記載の構成を採用する場合、請求項7に記載の構成によれば、中継軸部の一端は中間軸受けで支承されて端軸部を支持する伝動軸に直接連結して支持させることができるので、当該伝動軸に支持された端軸部の遊端部に中継軸部の一端を連結する場合と比較して、組み立てられたスクリューシャフト単体の強度を高めることができると共に、端軸部と本体軸部との間に中継軸部を、それぞれの位相を合わせて羽根板が連続するように連結する作業が簡単容易に行なえる。又、端軸部、中継軸部、及び本体軸部それぞれの羽根板が固着された筒状体の端部どうしを連結する構造と比較して、連結強度や伝達トルクを高めることが容易である。   Furthermore, when adopting the configuration according to claim 6, according to the configuration according to claim 7, one end of the relay shaft portion is supported by the intermediate bearing and directly connected to the transmission shaft that supports the end shaft portion. Since it can be supported, the strength of the assembled screw shaft can be increased compared to the case where one end of the relay shaft portion is connected to the free end portion of the end shaft portion supported by the transmission shaft. The operation of connecting the relay shaft portion between the end shaft portion and the main body shaft portion so that the blades are continuous with each other in phase can be performed easily and easily. In addition, it is easy to increase the connection strength and transmission torque compared to the structure in which the end portions of the cylindrical body to which the blades of the end shaft portion, the relay shaft portion, and the main body shaft portion are fixed are connected to each other. .

図1は搬送台車走行経路のスクリューシャフトを示す平面図である。FIG. 1 is a plan view showing a screw shaft of a transport carriage travel route. 図2は搬送台車の駆動装置を示す縦断正面図である。FIG. 2 is a longitudinal front view showing the driving device of the transport carriage. 図3は搬送台車の要部を示す平面図である。FIG. 3 is a plan view showing a main part of the transport carriage. 図4Aはスクリューシャフトと従動ローラーユニットを示す縦断正面図、図4Bはスクリューシャフト接続部の平面図である。FIG. 4A is a longitudinal front view showing the screw shaft and the driven roller unit, and FIG. 4B is a plan view of the screw shaft connecting portion. 図5は従動ローラーユニットの縦断側面図である。FIG. 5 is a longitudinal side view of the driven roller unit. 図6は従動ローラーユニットの横断平面図である。FIG. 6 is a cross-sectional plan view of the driven roller unit. 図7はスクリューシャフト接続部の縦断側面図である。FIG. 7 is a longitudinal side view of the screw shaft connecting portion. 図8はスクリューシャフト接続部の平面図である。FIG. 8 is a plan view of the screw shaft connecting portion. 図9はスクリューシャフト接続部の組立て分解方法を説明する横断平面図である。FIG. 9 is a cross-sectional plan view for explaining a method of assembling and disassembling the screw shaft connecting portion. 図10はスクリューシャフト接続部の中継シャフト一端の連結構造を示す縦断正面図である。FIG. 10 is a longitudinal front view showing a connecting structure of one end of the relay shaft of the screw shaft connecting portion. 図11はスクリューシャフト接続部の中継シャフト他端の連結構造を示す縦断正面図である。FIG. 11 is a longitudinal front view showing a connecting structure of the other end of the relay shaft of the screw shaft connecting portion.

図1及び図2に示すように、搬送台車1の直線状の走行経路2には、搬送台車1の下側で且つ左右の片側に寄った位置にスクリューシャフト3が当該搬送台車1の走行方向と平行に支承されている。このスクリューシャフト3は、一端においてチエン伝動手段4を介してモーター5と連動連結され、当該モーター5により正逆何れの方向にも回転駆動することができるものであるが、搬送台車1の走行経路2として、往行経路と復行経路とが並設され、両経路の端部間に搬送台車1を横送りするトラバーサーが併設されるようなレイアウトにおいては、各走行経路2(往行経路と復行経路)とに支承されるスクリューシャフト3は、一方向にのみ回転駆動される。   As shown in FIG. 1 and FIG. 2, a screw shaft 3 is disposed in a linear travel path 2 of the transport carriage 1 at a position below the transport carriage 1 and on one side of the left and right. It is supported in parallel. The screw shaft 3 is linked to a motor 5 at one end via a chain transmission means 4 and can be driven to rotate in either the forward or reverse direction by the motor 5. 2, in a layout in which an outbound route and a return route are arranged side by side and a traverser that laterally feeds the transport carriage 1 is provided between the ends of both routes, each travel route 2 (the outbound route and The screw shaft 3 supported by the return path) is driven to rotate in only one direction.

搬送台車1の走行経路2には、左右一対のガイドレール6が適当間隔おきに配置された架台を介して架設され、搬送台車1には、当該左右一対のガイドレール6に嵌合するように左右水平支軸で軸支された左右一対前後二組の支持用車輪7と、当該左右一対のガイドレール6の内側辺に隣接するように垂直支軸で軸支された左右一対前後二組の振れ止め用ローラー8とが設けられ、走行経路2に沿って走行できるように支持されている。この搬送台車1のワーク支持構造は、図示していないが、取り扱うワークによって適当なものが採用される。勿論、搬送台車1の支持構造は、図示のものに限定されない。   A pair of left and right guide rails 6 are installed on the travel route 2 of the transport carriage 1 via a base arranged at appropriate intervals, and the transport carriage 1 is fitted to the pair of left and right guide rails 6. Two pairs of left and right front and rear support wheels 7 supported by left and right horizontal support shafts, and two pairs of left and right front and rear shafts supported by vertical support shafts so as to be adjacent to the inner sides of the pair of left and right guide rails 6 An anti-sway roller 8 is provided and supported so as to be able to travel along the travel route 2. Although the workpiece support structure of the transport carriage 1 is not shown, an appropriate one is adopted depending on the workpiece to be handled. Of course, the support structure of the transport carriage 1 is not limited to the illustrated one.

図1に示すスクリューシャフト3は、4本のスクリューシャフト単体9A〜9Dを連結して構成されているが、この本数は走行経路2の全長に応じて適宜変えることができる。両端のスクリューシャフト単体9A,9Dの遊端側は、各スクリューシャフト単体9A,9Dの遊端から同心状に固着突設された支軸10a,10bを介して、当該スクリューシャフト単体9A,9Dの遊端の外側で端部軸受け11A,11Bにより支承され、スクリューシャフト単体9Aの支軸10aが前記チエン伝動手段4を介してモーター5と連動連結されている。スクリューシャフト単体9A,9Bの隣接端部、スクリューシャフト単体9B,9Cの隣接端部、及びスクリューシャフト単体9C,9Dの隣接端部は、それぞれ中間軸受け12A〜12Cによって支承されている。   The screw shaft 3 shown in FIG. 1 is configured by connecting four screw shafts 9 </ b> A to 9 </ b> D, but this number can be appropriately changed according to the total length of the travel path 2. The free ends of the screw shafts 9A and 9D at both ends are connected to the screw shafts 9A and 9D via support shafts 10a and 10b that are fixedly projected from the free ends of the screw shafts 9A and 9D. Outside the free end, it is supported by end bearings 11A and 11B, and the support shaft 10a of the screw shaft unit 9A is linked to the motor 5 through the chain transmission means 4. The adjacent ends of the screw shafts 9A and 9B, the adjacent ends of the screw shafts 9B and 9C, and the adjacent ends of the screw shafts 9C and 9D are supported by intermediate bearings 12A to 12C, respectively.

各スクリューシャフト9A〜9Dは、適当な外径の筒状体13の周面に羽根板14を所定の送りピッチの螺旋状に固着突設したものであり、各スクリューシャフト9A〜9Dの隣接端部どうしは、スクリューシャフト9A〜9Dの筒状体13間の隙間dを隔てて羽根板14が連続した螺旋を描くように、互いに連結一体化されている。この図1に示す実施形態では、羽根板14の送りピッチが大きい高速走行区間A1と、羽根板14の送りピッチが小さい低速走行区間A2とが交互に配置され、各中間軸受け12A〜12Cは、走行区間A1と走行区間A2の間の位置ではなく、走行区間A1及び/又は走行区間A2の中間位置に配置されている。尚、高速走行区間A1と低速走行区間A2の2区間を組み合わせて走行経路2を構成しているが、それぞれ羽根板14の送りピッチの異なる3区間又はそれ以上の区間を組み合わせて走行経路2を構成することもできる。   Each of the screw shafts 9A to 9D has a blade plate 14 fixedly protruding in a spiral shape with a predetermined feed pitch on the peripheral surface of a cylindrical body 13 having an appropriate outer diameter, and is adjacent to each screw shaft 9A to 9D. The parts are connected and integrated with each other so as to draw a spiral in which the blades 14 are continuous with a gap d between the cylindrical bodies 13 of the screw shafts 9A to 9D. In the embodiment shown in FIG. 1, a high speed traveling section A1 in which the feed pitch of the blades 14 is large and a low speed traveling section A2 in which the feed pitch of the blades 14 is small are alternately arranged, and the intermediate bearings 12A to 12C are It is not at a position between the travel section A1 and the travel section A2, but at an intermediate position between the travel section A1 and / or the travel section A2. In addition, although the travel route 2 is configured by combining the two sections of the high speed travel section A1 and the low speed travel section A2, the travel path 2 is configured by combining three sections with different feed pitches of the blades 14 or more. It can also be configured.

搬送台車1の底部には、スクリューシャフト3(各スクリューシャフト単体9A〜9D)の羽根板14に係合するローラーユニット15が設けられている。このローラーユニット15は、スクリューシャフト3に被さる門形可動体16と、この門形可動体16の内側に軸支された3つの従動ローラー17A〜17Cから構成されている。   A roller unit 15 that engages with a blade 14 of the screw shaft 3 (each screw shaft unit 9A to 9D) is provided at the bottom of the transport carriage 1. The roller unit 15 includes a portal movable body 16 that covers the screw shaft 3 and three driven rollers 17 </ b> A to 17 </ b> C that are pivotally supported inside the portal movable body 16.

以下、このローラーユニット15の詳細構造を図2〜図6に基づいて説明すると、搬送台車1のフレーム18に高さ調整自在に取り付けられたローラーユニット支持体19の下側に、前記門形可動体16が垂直支軸20を介して取り付けられ、前記門形可動体16が、垂直支軸20の軸心、即ち、スクリューシャフト3の軸心に対し直交する垂直な回転軸心20aの周りで回転可能に支持されている。従動ローラー17A〜17Cは、スクリューシャフト3の周方向に羽根板14に沿って配列されたもので、スクリューシャフト3の軸心方向から見て(図4参照)、中間位置の従動ローラー17Bは、門形可動体16の回転軸心20aの近傍に位置し、両側の従動ローラー17A,17Cは、中間位置の従動ローラー17Bに対しそれぞれ周方向前後に90度離れた位置に配置されている。これら3つの従動ローラー17A〜17Cは、スクリューシャフト3の羽根板14を、当該羽根板14の両側面に対し直角方向の両側から挟む一対のローラー単体21から構成され、各一対のローラー単体21は、これら一対のローラー単体21間を通るスクリューシャフト3の半径方向と平行に門形可動体16に固着された支軸22に自転のみ可能に支承されている。   Hereinafter, the detailed structure of the roller unit 15 will be described with reference to FIGS. 2 to 6. The roller-shaped movable unit 15 is provided below the roller unit support 19 attached to the frame 18 of the transport carriage 1 so as to be adjustable in height. A body 16 is attached via a vertical support shaft 20, and the portal movable body 16 is arranged around an axis of the vertical support shaft 20, that is, a vertical rotation axis 20 a orthogonal to the axis of the screw shaft 3. It is rotatably supported. The driven rollers 17A to 17C are arranged along the blade plate 14 in the circumferential direction of the screw shaft 3, and when viewed from the axial direction of the screw shaft 3 (see FIG. 4), the driven roller 17B at an intermediate position is Positioned in the vicinity of the rotational axis 20a of the portal movable body 16, the driven rollers 17A and 17C on both sides are disposed at positions 90 degrees apart in the circumferential direction from the driven roller 17B at the intermediate position. These three driven rollers 17 </ b> A to 17 </ b> C are composed of a pair of roller single bodies 21 that sandwich the blade plate 14 of the screw shaft 3 from both sides in a direction perpendicular to the both side surfaces of the blade plate 14. The shaft 22 fixed to the portal movable body 16 is supported so as to be able to rotate only in parallel to the radial direction of the screw shaft 3 passing between the pair of rollers 21.

ローラーユニット支持体19は、垂直支軸20の上半部を固定支持する軸受け部材23を左右両側から挟んでボルトナット24により固定するもので、上向きに延出する左右一対の垂直板25a,25bを備え、この左右一対の垂直板25a,25bが、搬送台車1のフレーム18側に設けられた左右一対のアングル材26a,26bに、垂直板25a,25bに設けられた上下方向に長い長孔27と当該長孔27を貫通するボルトナット28とで高さ調整自在に取り付けられ、左右一対のアングル材26a,26bの外側で当該ローラーユニット支持体19に下側から貫通係止させた左右一対の吊下ボルト29を、左右一対のアングル材26a,26bに操作ナット30aとロックナット30bとで固定している。従って、ボルトナット28とロックナット30bを弛めた状態で、操作ナット30aを締め付けることにより、吊下ボルト29で吊り下げているローラーユニット支持体19を上昇させ、逆に操作ナット30aを弛めて吊下ボルト29で吊り下げているローラーユニット支持体19を降下させて、当該ローラーユニット支持体19の高さ調整、即ち、スクリューシャフト3の羽根板14に対する従動ローラー17A〜17Cの上下方向の係合位置調整を行い、最後にボルトナット28とロックナット30bの締結操作で、ローラーユニット支持体19を固定することができる。勿論、上記操作により、ローラーユニット15の従動ローラー17A〜17Cがスクリューシャフト3の羽根板14と干渉しない高さまで上昇させて固定し、搬送台車1をして走行経路2上を自在に手押し移動させることもできる。   The roller unit support 19 includes a bearing member 23 that fixes and supports the upper half of the vertical support shaft 20 and is fixed by bolts and nuts 24 from both left and right sides. A pair of left and right vertical plates 25a and 25b extending upward. The pair of left and right vertical plates 25a and 25b are provided in the pair of left and right angle members 26a and 26b provided on the frame 18 side of the transport carriage 1 and are elongated holes provided in the vertical plates 25a and 25b in the vertical direction. 27 and a bolt nut 28 penetrating through the long hole 27 are attached so as to be adjustable in height, and a pair of left and right which is penetrated and locked to the roller unit support body 19 from the lower side outside the pair of left and right angle members 26a and 26b. The suspension bolt 29 is fixed to a pair of left and right angle members 26a, 26b with an operation nut 30a and a lock nut 30b. Accordingly, by tightening the operation nut 30a with the bolt nut 28 and the lock nut 30b loosened, the roller unit support 19 suspended by the suspension bolt 29 is raised, and conversely, the operation nut 30a is loosened. The roller unit support 19 that is suspended by the suspension bolt 29 is lowered to adjust the height of the roller unit support 19, that is, in the vertical direction of the driven rollers 17 </ b> A to 17 </ b> C with respect to the blade 14 of the screw shaft 3. The roller unit support 19 can be fixed by adjusting the engagement position and finally fastening the bolt nut 28 and the lock nut 30b. Of course, by the above operation, the driven rollers 17A to 17C of the roller unit 15 are raised and fixed to a height at which they do not interfere with the blades 14 of the screw shaft 3, and the transport carriage 1 is freely pushed and moved on the travel path 2. You can also.

門形可動体16は、ローラーユニット支持体19との間に介装された付勢手段31により、従動ローラー17A〜17Cの各一対のローラー単体21が羽根板14を周方向90度おきの間隔で挟持する初期姿勢に付勢保持されている。この付勢手段31は、門形可動体16は、ローラーユニット支持体19との間で垂直支軸20に遊嵌された捩じりコイルスプリング32と、ローラーユニット支持体19側に上端を固着した垂直ピン33と、門形可動体16側に下端を固着した垂直ピン34とから構成され、捩じり応力の作用していない状態での捩じりコイルスプリング32の両端部32a,32bを前記両垂直ピン33,34に係合させたものである。従って、門形可動体16は、前記初期姿勢から前後何れ側に対しても、垂直ピン33,34の何れか一方を介して捩じりコイルスプリング32を捩じり込み、その反力に抗して垂直支軸20(回転軸心20a)の周りに回転することができる。このときの門形可動体16の回転範囲は、当該門形可動体16の上面に垂直支軸20の周方向に適当間隔を隔てて突設した突起(ボルト頭部)35a,35bと、この2つの突起35a,35b間に下端部が位置するように前記軸受け部材23に固着したストッパープレート36との当接により、規制することができる。   The pair of roller single bodies 21 of the driven rollers 17 </ b> A to 17 </ b> C are spaced apart from each other by 90 degrees in the circumferential direction by the biasing means 31 interposed between the portal movable body 16 and the roller unit support body 19. The urging is held in the initial posture to be clamped by. The biasing means 31 includes a portal movable body 16 having a torsion coil spring 32 loosely fitted to the vertical support shaft 20 between the roller unit support body 19 and an upper end fixed to the roller unit support body 19 side. The vertical pins 33 and the vertical pins 34 whose lower ends are fixed to the portal movable body 16 side are provided, and both ends 32a and 32b of the torsion coil spring 32 in a state where no torsional stress is applied. The two vertical pins 33 and 34 are engaged with each other. Therefore, the portal movable body 16 twists the torsion coil spring 32 through either one of the vertical pins 33 and 34 from either side of the initial posture to the front or back, and resists the reaction force. Thus, it can rotate around the vertical support shaft 20 (rotation axis 20a). The range of rotation of the gate-shaped movable body 16 at this time includes projections (bolt heads) 35a and 35b that protrude from the upper surface of the portal-shaped movable body 16 at an appropriate interval in the circumferential direction of the vertical support shaft 20. It can regulate by contact with the stopper plate 36 fixed to the bearing member 23 so that the lower end portion is positioned between the two protrusions 35a and 35b.

次に、中間軸受け12A〜12Cによるその両側のスクリューシャフト単体9A〜9Dの支持構造について、図7〜図11に基づいて説明する。中間軸受け12A〜12Cは、スクリューシャフト単体9A〜9Dを構成する筒状体13の内側に無理なく遊嵌できる程度の外径の軸受け本体37と、この軸受け本体37の軸心方向の幅の中央位置に固着されて当該軸受け本体37の一側方に延出する、軸受け本体37の軸心方向に対し直角向きの板材で構成された支持部38と、この支持部38の外端に固着された取付け板39とから構成されたもので、取付け板39が緩衝部材40を介して架台41上に設置されている。   Next, the support structure of the screw shafts 9A to 9D on both sides by the intermediate bearings 12A to 12C will be described with reference to FIGS. The intermediate bearings 12A to 12C include an outer diameter bearing body 37 that can be easily loosely fitted inside the cylindrical body 13 constituting the screw shafts 9A to 9D, and the center of the axial width of the bearing body 37. A support portion 38, which is fixed to a position and extends to one side of the bearing main body 37, is made of a plate material perpendicular to the axial direction of the bearing main body 37, and is fixed to the outer end of the support portion 38. The mounting plate 39 is installed on the gantry 41 via the buffer member 40.

中間軸受け12A〜12Cの片側に隣接するスクリューシャフト単体9A〜9Cの当該中間軸受け12A〜12C側の端部には、伝動軸42の基端部を筒状体13と同心状に固着する軸受け部材49aが、筒状体13の端から一定距離内側に入った位置に固着され、この伝動軸42を中間軸受け12A〜12Cの軸受け本体37が備える自動調心ベアリング37aに挿通させることにより、スクリューシャフト単体9A〜9Cの筒状体13の端部、即ち、筒状端部13aを、軸受け本体37の支持部38から片側に突出する部分に被せるようにして、当該筒状端部13aを支持部38に接近させている。中間軸受け12A〜12Cの反対側に隣接するスクリューシャフト単体9B〜9Dは、中間軸受け12A〜12Cから突出する前記伝動軸42の突出端部42aに連結される短尺の端軸部43と、この端軸部43に連結される中継軸部44と、この中継軸部44に連結される長尺の本体軸部45とから構成されている。   A bearing member for fixing the base end portion of the transmission shaft 42 concentrically with the cylindrical body 13 to the end portion on the intermediate bearing 12A to 12C side of the single screw shaft 9A to 9C adjacent to one side of the intermediate bearings 12A to 12C. 49a is fixed to a position that is a certain distance inside from the end of the cylindrical body 13, and the transmission shaft 42 is inserted into a self-aligning bearing 37a included in the bearing body 37 of the intermediate bearings 12A to 12C, thereby screw shaft The end portion of the cylindrical body 13 of the single body 9A to 9C, that is, the cylindrical end portion 13a is put on a portion protruding from the support portion 38 of the bearing body 37 to one side, and the cylindrical end portion 13a is supported by the support portion. 38. The screw shafts 9B to 9D adjacent to the opposite sides of the intermediate bearings 12A to 12C include a short end shaft portion 43 connected to the protruding end portion 42a of the transmission shaft 42 protruding from the intermediate bearings 12A to 12C, and this end. The relay shaft portion 44 is connected to the shaft portion 43, and the long main body shaft portion 45 is connected to the relay shaft portion 44.

端軸部43は、羽根板14を外周面に固着した筒状体13の軸心方向のほぼ中央位置に、中間軸受け12A〜12Cの軸受け本体37から突出する伝動軸42の突出端部42aに外嵌する軸受け部材46が同心状に固着されている。この軸受け部材46は、伝動軸42の突出端部42aに外嵌し、当該軸受け部材46を挟むように伝動軸42の突出端部42aに外嵌した筒状スペーサー42b,42cと、伝動軸42の突出端部42aに着脱自在にネジ嵌合した締結ナット42dによって、伝動軸42の突出端部42a上の定位置に固定されるものであり、伝動軸42から端軸部43への伝動は、伝動軸42の突出端部42aと軸受け部材46とに設けられたキー溝間に嵌合するキー42eを介して行なわれる。当該キー42eは、端軸部43の筒状体13の外側から半径方向に螺合させたキー固定ボルト42fによって固定されている。而して、伝動軸42の突出端部42a上の定位置に軸受け部材46が固定された端軸部43は、その筒状体13の中間軸受け12A〜12C側の端部、即ち、スクリューシャフト単体9B〜9Dの中間軸受け12A〜12C側の筒状端部13bが、当該中間軸受け12A〜12Cの軸受け本体37の支持部38から突出する部分に被さり、当該筒状端部13bが支持部38に接近している。従って、中間軸受け12A〜12Cの両側に位置するスクリューシャフト単体9A,9B間、スクリューシャフト単体9B,9C間、及びスクリューシャフト単体9C,9D間には、各中間軸受け12A〜12Cの軸受け本体37の軸心方向の幅より十分に狭く、支持部38より少し幅広の隙間dが存在するだけである。   The end shaft portion 43 is formed on the projecting end portion 42a of the transmission shaft 42 projecting from the bearing body 37 of the intermediate bearings 12A to 12C at a substantially central position in the axial direction of the cylindrical body 13 with the blade plate 14 fixed to the outer peripheral surface. An outer fitting bearing member 46 is fixed concentrically. The bearing member 46 is fitted on the protruding end portion 42a of the transmission shaft 42, cylindrical spacers 42b and 42c are fitted on the protruding end portion 42a of the transmission shaft 42 so as to sandwich the bearing member 46, and the transmission shaft 42. It is fixed at a fixed position on the projecting end portion 42a of the transmission shaft 42 by a fastening nut 42d that is detachably screwed to the projecting end portion 42a, and transmission from the transmission shaft 42 to the end shaft portion 43 is performed. This is carried out via a key 42e fitted between the key grooves provided in the protruding end portion 42a of the transmission shaft 42 and the bearing member 46. The key 42e is fixed by a key fixing bolt 42f screwed in the radial direction from the outside of the cylindrical body 13 of the end shaft portion 43. Thus, the end shaft portion 43 to which the bearing member 46 is fixed at a fixed position on the protruding end portion 42a of the transmission shaft 42 is an end portion of the cylindrical body 13 on the intermediate bearings 12A to 12C side, that is, a screw shaft. The cylindrical end portions 13b of the single bearings 9B to 9D on the side of the intermediate bearings 12A to 12C cover portions protruding from the support portions 38 of the bearing main bodies 37 of the intermediate bearings 12A to 12C, and the cylindrical end portions 13b are supported by the support portions 38. Is approaching. Accordingly, between the screw shafts 9A and 9B located on both sides of the intermediate bearings 12A to 12C, between the screw shafts 9B and 9C, and between the screw shafts 9C and 9D, the bearing body 37 of each of the intermediate bearings 12A to 12C. There is only a gap d that is sufficiently narrower than the width in the axial direction and slightly wider than the support portion 38.

中継軸部44は、羽根板14を外周面に固着した筒状体13の両端に連結部材47,48を内嵌固着したものである。この連結部材47,48とその外側の筒状体13とには、軸心位置に達する半径方向の切込みにより凹窪部47a,48aが、半径方向の外側と軸心方向の両外側とに開放され且つ半径方向の向きが同一になるように形成されている。中間軸受け12A〜12Cで支承され且つ端軸部43が取り付けられた伝動軸42には、前記締結ナット42dが螺嵌する螺軸部より外側で当該端軸部43より外側へ突出するように回転伝達用端部42gが突設されている。この回転伝達用端部42gは、前記締結ナット42dが螺嵌する螺軸部より小径の軸部の直径方向の両側に偏平面を切削加工して、前記中継軸部44の一端の連結部材47の凹窪部47aに丁度嵌合できる厚さの偏平軸部としたものである。一方、本体軸部45は、羽根板14を外周面に固着した筒状体13の中継軸部44に連結される側の端部に軸受け部材49bを内嵌固着し、この軸受け部材49bから回転伝達用突出軸部50aを備えた伝動軸50を同心状に固着突設したものである。この回転伝達用突出軸部50aは、本体軸部45から突出するもので、前記伝動軸42の回転伝達用端部42gよりも大径の軸部の直径方向の両側に偏平面を切削加工して、前記中継軸部44の他端の連結部材48の凹窪部48aに丁度嵌合できる厚さの偏平軸部としたものである。尚、小径の回転伝達用端部42gが半径方向に嵌合する凹窪部47aと、大径の回転伝達用突出軸部50aが半径方向に嵌合する凹窪部48aとは、嵌合する回転伝達用端部42gと回転伝達用突出軸部50aの直径(幅)にあわせて半径方向の奥行きが変えてあり、中継軸部44の向きを変えて、凹窪部47a内の軸心位置まで回転伝達用突出軸部50aを嵌合させることはできない。   The relay shaft portion 44 is formed by fitting and fixing coupling members 47 and 48 to both ends of the cylindrical body 13 with the blade plate 14 fixed to the outer peripheral surface. The connecting members 47 and 48 and the cylindrical body 13 on the outer side thereof have recesses 47a and 48a that are opened radially outward and axially outward by a radial cut reaching the axial position. And the radial direction is the same. The transmission shaft 42 supported by the intermediate bearings 12 </ b> A to 12 </ b> C and attached with the end shaft portion 43 is rotated so as to protrude outward from the end shaft portion 43 outside the screw shaft portion into which the fastening nut 42 d is screwed. A transmission end 42g is projected. The rotation transmission end portion 42g is formed by cutting a flat surface on both sides in the diameter direction of the shaft portion having a smaller diameter than the screw shaft portion into which the fastening nut 42d is screwed, and connecting members 47 at one end of the relay shaft portion 44. This is a flat shaft portion having a thickness that can be just fitted into the recessed portion 47a. On the other hand, the main body shaft portion 45 has a bearing member 49b fitted and fixed to an end portion of the cylindrical body 13 to which the blade plate 14 is fixed to the outer peripheral surface and connected to the relay shaft portion 44, and is rotated from the bearing member 49b. A transmission shaft 50 having a transmission projecting shaft portion 50a is concentrically fixedly projected. The rotation transmission protruding shaft portion 50a protrudes from the main body shaft portion 45, and is formed by cutting a flat surface on both sides in the diameter direction of the shaft portion having a diameter larger than the rotation transmission end portion 42g of the transmission shaft 42. Thus, a flat shaft portion having a thickness that can be just fitted into the recessed portion 48a of the connecting member 48 at the other end of the relay shaft portion 44 is provided. The concave portion 47a in which the small-diameter rotation transmission end portion 42g is fitted in the radial direction and the concave portion 48a in which the large-diameter rotation transmission protruding shaft portion 50a is fitted in the radial direction are fitted. The depth in the radial direction is changed according to the diameter (width) of the rotation transmission end portion 42g and the rotation transmission protruding shaft portion 50a, and the direction of the relay shaft portion 44 is changed to change the axial center position in the recessed portion 47a. The projecting shaft portion 50a for rotation transmission cannot be fitted up to.

端軸部43と中継軸部44との結合、即ち、端軸部43がキー止めされた伝動軸42に対する中継軸部44の結合は、当該中継軸部44の端部における筒状体13と連結部材47、及び当該連結部材47の凹窪部47a内に嵌合する伝動軸42側の回転伝達用端部42gを貫通する1本のボルト51aとナット51bとで行なわれ、中継軸部44と本体軸部45との結合は、当該中継軸部44の端部における筒状体13と連結部材48、及び当該連結部材48の凹窪部48a内に嵌合する本体軸部45側の回転伝達用突出軸部50aを貫通する、回転伝達用突出軸部50aの幅方向2本のボルト52a,53aとナット52b,53bとで行なわれる。これら各ボルト51a〜53aとナット51b〜53bは、中継軸部44の筒状体13の外周面から突出しないように、中継軸部44側に形成した凹部内に嵌合するように構成されている。   The coupling between the end shaft portion 43 and the relay shaft portion 44, that is, the coupling of the relay shaft portion 44 to the transmission shaft 42 on which the end shaft portion 43 is keyed, is connected to the cylindrical body 13 at the end of the relay shaft portion 44. This is performed by a connecting member 47 and a bolt 51a and a nut 51b passing through a rotation transmitting end 42g on the side of the transmission shaft 42 fitted in the recessed portion 47a of the connecting member 47, and the relay shaft portion 44 is formed. The main body shaft portion 45 is connected to the cylindrical body 13 and the connecting member 48 at the end of the relay shaft portion 44, and the rotation on the main body shaft portion 45 side fitted in the recessed portion 48a of the connecting member 48. This is performed by two bolts 52a and 53a and nuts 52b and 53b in the width direction of the rotation transmission projection shaft portion 50a penetrating the transmission projection shaft portion 50a. Each of the bolts 51a to 53a and the nuts 51b to 53b are configured to be fitted into a recess formed on the relay shaft portion 44 side so as not to protrude from the outer peripheral surface of the tubular body 13 of the relay shaft portion 44. Yes.

上記のように構成されたスクリューシャフト3の組立て手順について説明すると、スクリューシャフト単体9Aは、その一端の伝動軸42を中間軸受け12Aの軸受け本体37に挿通して支持させると共に、他端の支軸10aを端部軸受け11Aに支持させて、所定位置に支承する。勿論、このスクリューシャフト単体9Aは、その両端を支承する軸受け11A,12Aを架台上に固定した状態では支承することができないので、このスクリューシャフト単体9Aも他のスクリューシャフト単体9B〜9Dと同様に構成し、端部軸受け11Aには、伝動軸42のみを挿通支承させておくことも可能である。   The assembly procedure of the screw shaft 3 configured as described above will be described. The screw shaft single body 9A has the transmission shaft 42 at one end thereof inserted into and supported by the bearing body 37 of the intermediate bearing 12A, and the support shaft at the other end. 10a is supported by the end bearing 11A and supported at a predetermined position. Of course, this screw shaft unit 9A cannot be supported in a state where the bearings 11A, 12A supporting both ends thereof are fixed on the gantry, so that the screw shaft unit 9A is also similar to the other screw shaft units 9B to 9D. It is also possible to configure the end bearing 11A so that only the transmission shaft 42 is inserted and supported.

スクリューシャフト単体9Bは、先ず端軸部43を中間軸受け12Aから突出する伝動軸42に取り付ける。即ち、端軸部43を伝動軸42に、両者間にキー42eを介在させた状態で筒状スペーサー42b,42cと共に外嵌させ、締結ナット42dを締め付けて伝動軸42上の定位置に端軸部43を固定すると共に、キー固定ボルト42fを締め付けてキー42eを固定する。次に本体軸部45の一端から突出する伝動軸42を中間軸受け12Bの軸受け本体37に挿通させて支承させる。このとき端軸部43と本体軸部45との間には、丁度中継軸部44を嵌め込むことができる空間が確保されることになり、この端軸部43と本体軸部45との間に中継軸部44を横側方から半径方向に嵌め込む。このとき、端軸部43から突出する状態の伝動軸42の回転伝達用端部42gに中継軸部44の一端凹窪部47aの半径方向の開放端を対向させると共に、本体軸部45から突出する伝動軸50の回転伝達用突出軸部50aに中継軸部44の他端凹窪部48aの半径方向の開放端を対向させた状態で、当該中継軸部44を、伝動軸42及び本体軸部45の軸心位置まで半径方向に平行移動させて嵌め込む。最後に、伝動軸42の回転伝達用端部42gとこれに外嵌する中継軸部44の端部(連結部材47)とをボルト51aとナット51bとで結合一体化すると共に、本体軸部45の回転伝達用突出軸部50aとこれに外嵌する中継軸部44の端部(連結部材48)とをボルト52a,53aとナット52b、53bとで結合一体化する。   The screw shaft single body 9B first attaches the end shaft portion 43 to the transmission shaft 42 protruding from the intermediate bearing 12A. That is, the end shaft portion 43 is externally fitted with the cylindrical spacers 42b and 42c with the key 42e interposed between the end shaft portion 43 and the key 42e therebetween, and the fastening nut 42d is tightened to fix the end shaft to a fixed position on the transmission shaft 42. While fixing the portion 43, the key fixing bolt 42f is tightened to fix the key 42e. Next, the transmission shaft 42 protruding from one end of the body shaft portion 45 is inserted into and supported by the bearing body 37 of the intermediate bearing 12B. At this time, a space in which the relay shaft portion 44 can be fitted is secured between the end shaft portion 43 and the main body shaft portion 45, and the space between the end shaft portion 43 and the main body shaft portion 45 is secured. The relay shaft portion 44 is fitted in the radial direction from the lateral side. At this time, the open end in the radial direction of the one-end recessed portion 47a of the relay shaft portion 44 is opposed to the rotation transmission end portion 42g of the transmission shaft 42 in a state of protruding from the end shaft portion 43, and protrudes from the main body shaft portion 45. The relay shaft portion 44 is connected to the transmission shaft 42 and the main body shaft in a state where the radially open end of the concave recess portion 48a of the other end of the relay shaft portion 44 is opposed to the rotation transmission projecting shaft portion 50a of the transmission shaft 50. The portion 45 is fitted by being translated in the radial direction to the axial center position. Finally, the rotation transmission end portion 42g of the transmission shaft 42 and the end portion (connecting member 47) of the relay shaft portion 44 fitted on the transmission shaft 42 are coupled and integrated by bolts 51a and nuts 51b, and the main body shaft portion 45 is also integrated. The rotation transmission projecting shaft portion 50a and the end portion (connecting member 48) of the relay shaft portion 44 fitted on the rotation shaft are coupled and integrated by bolts 52a and 53a and nuts 52b and 53b.

以下同様に、スクリューシャフト単体9C,9Dを組み込みことによりスクリューシャフト3が組み立てられるのであるが、組み立てられたスクリューシャフト3は、スクリューシャフト単体9A,9B間、スクリューシャフト単体9B,9C間、及びスクリューシャフト単体9C,9D間がそれぞれ中間軸受け12A〜12Cによって支承されるものでありながら、各中間軸受け12A〜12Cの位置では、スクリューシャフト3を構成する筒状体13間に、各中間軸受け12A〜12Cの板状の支持部38が下向きに突出する幅の狭い隙間dが形成されるだけである。又、上記のように各スクリューシャフト単体9A〜9Dが組み付けられることにより、各中間軸受け12A〜12Cの両側に隣接する各スクリューシャフト単体9A〜9D間では、羽根板14が前記隙間dを隔てて螺旋状に連続し、更に、各スクリューシャフト単体9B〜9Dを構成する端軸部43と中継軸部44との間、及び中継軸部44と本体軸部45との間では、筒状体13の端面どうしが隣接すると共に、羽根板14の端面どうしが隣接して螺旋状に連続するように構成されている。   Similarly, the screw shaft 3 is assembled by incorporating the screw shaft simple units 9C and 9D. The assembled screw shaft 3 includes the screw shafts 9A and 9B, the screw shafts 9B and 9C, and the screws. The shafts 9C and 9D are supported by the intermediate bearings 12A to 12C, respectively. However, at the positions of the intermediate bearings 12A to 12C, the intermediate bearings 12A to 12B are interposed between the cylindrical bodies 13 constituting the screw shaft 3. Only a narrow gap d in which the 12C plate-like support portion 38 protrudes downward is formed. Further, by assembling the screw shaft single units 9A to 9D as described above, the blade plate 14 is spaced from the gap d between the screw shaft single units 9A to 9D adjacent to both sides of the intermediate bearings 12A to 12C. Further, the cylindrical body 13 is continuous between the end shaft portion 43 and the relay shaft portion 44 and between the relay shaft portion 44 and the main body shaft portion 45 constituting the screw shafts 9B to 9D. The end surfaces of the blades 14 are adjacent to each other, and the end surfaces of the blades 14 are adjacent to each other and are spirally continuous.

以上のようにしてスクリューシャフト3を組み立てたならば、その上側で走行経路2上に搬送台車1を支持させ、当該搬送台車1の底部に設けられているローラーユニット15をスクリューシャフト3の羽根板14に係合させる。即ち、羽根板14に沿って周方向に並ぶ3つの従動ローラー17A〜17Cそれぞれを構成する各一対のローラー単体21間で羽根板14を挟持させる。このとき、3つの従動ローラー17A〜17Cを軸支する門形可動体16は、捩じりコイルスプリング32の付勢力で初期位置に保持されているが、この初期位置での3つの従動ローラー17A〜17Cの配列方向が、高速走行区間A1と低速走行区間A2の内、何れか一方の区間、例えば高速走行区間A1における羽根板14の螺旋角度とほぼ一致するように構成しておけば、先に説明したように、スクリューシャフト3と干渉しない高さまでローラーユニット15を上昇させた状態で、走行経路2中の高速走行区間A1内の適当位置まで搬送台車1を手押し移動させ、この後、ローラーユニット15を降下させて、従動ローラー17A〜17Cをスクリューシャフト3の羽根板14に係合させることができる。又、場合によっては、走行経路2の少なくとも一端に、スクリューシャフト3を備えない搬送台車待機場所を設けておき、スクリューシャフト3を所定方向に回転(モーター5で低速駆動又は手動回転)させながら、搬送台車待機場所に支持させた搬送台車1をスクリューシャフト3の方へ手押し移動させることにより、ローラーユニット15の各従動ローラー17A〜17Cをスクリューシャフト3の羽根板14に順次係合させることも可能である。   When the screw shaft 3 is assembled as described above, the conveyance carriage 1 is supported on the travel path 2 on the upper side, and the roller unit 15 provided at the bottom of the conveyance carriage 1 is attached to the blade plate of the screw shaft 3. 14 is engaged. That is, the vane plate 14 is sandwiched between each pair of roller units 21 constituting the three driven rollers 17 </ b> A to 17 </ b> C arranged in the circumferential direction along the vane plate 14. At this time, the portal movable body 16 that pivotally supports the three driven rollers 17A to 17C is held at the initial position by the urging force of the torsion coil spring 32, but the three driven rollers 17A at this initial position. If the arrangement direction of ˜17C is configured to substantially coincide with the spiral angle of the blade 14 in any one of the high speed travel section A1 and the low speed travel section A2, for example, the high speed travel section A1, As described above, in the state in which the roller unit 15 is raised to a height that does not interfere with the screw shaft 3, the conveyance carriage 1 is manually pushed to an appropriate position in the high-speed traveling section A1 in the traveling path 2, and then the roller The unit 15 can be lowered to engage the driven rollers 17 </ b> A to 17 </ b> C with the blade 14 of the screw shaft 3. In some cases, at least one end of the travel path 2 is provided with a conveyance carriage standby place that does not include the screw shaft 3, and while rotating the screw shaft 3 in a predetermined direction (low-speed drive or manual rotation with the motor 5), It is also possible to sequentially engage each driven roller 17A to 17C of the roller unit 15 with the blade plate 14 of the screw shaft 3 by manually pushing and moving the transport cart 1 supported at the transport cart standby place toward the screw shaft 3. It is.

而して、スクリューシャフト3をモーター5により所定向きに回転駆動すれば、スクリューシャフト3の羽根板14に係合するローラーユニット15の3つの従動ローラー17A〜17Cのそれぞれが、具体的には各従動ローラー17A〜17Cを構成する各一対のローラー単体21の内、何れか一方のローラー単体21が、羽根板14によってスクリューシャフト3の軸心方向の一方に送り作用を受け、搬送台車1が所定の速度で走行経路2に沿って走行することになる。即ち、高速走行区間A1では羽根板14の大きな送りピッチに対応する高速で走行し、低速走行区間A2では羽根板14の小さな送りピッチに対応する低速で走行することになる。又、高速走行区間A1と低速走行区間A2との間では、羽根板14の送りピッチ(スクリューシャフト3の軸心に対する羽根板14の螺旋角度)が徐々に変化するので、従動ローラー17A〜17Cの列の両端に位置する従動ローラー17A,17C間(ほぼ180度の範囲)における羽根板14の螺旋角度の変化を吸収できるだけの遊びが、従動ローラー17A〜17Cそれぞれの一対のローラー単体21間にあれば、高速走行区間A1と低速走行区間A2の一方から他方への搬送台車1の乗り移りは、無理なく円滑に行なわれる。このとき、高速走行区間A1から低速走行区間A2へ乗り移るときには、従動ローラー17A〜17Cを備えた門形可動体16が回転軸心20aの周りに捩じりコイルスプリング32の付勢力に抗して回転し、逆に、低速走行区間A2から高速走行区間A1へ乗り移るときには、門形可動体16が回転軸心20aの周りに捩じりコイルスプリング32の付勢力の作用方向に回転する。   Thus, when the screw shaft 3 is rotationally driven by the motor 5 in a predetermined direction, each of the three driven rollers 17A to 17C of the roller unit 15 engaged with the blade plate 14 of the screw shaft 3 is specifically One of the pair of roller units 21 constituting the driven rollers 17A to 17C is subjected to a feeding action to one of the axial directions of the screw shaft 3 by the vane plate 14, so that the transport carriage 1 is predetermined. The vehicle travels along the travel route 2 at a speed of That is, the vehicle travels at a high speed corresponding to a large feed pitch of the blade 14 in the high speed travel section A1, and travels at a low speed corresponding to a small feed pitch of the blade 14 in the low speed travel section A2. Further, since the feed pitch of the blade plate 14 (the spiral angle of the blade plate 14 with respect to the axis of the screw shaft 3) gradually changes between the high-speed traveling section A1 and the low-speed traveling section A2, the driven rollers 17A to 17C There is play between the pair of roller units 21 of each of the driven rollers 17A to 17C that can absorb the change in the spiral angle of the blade 14 between the driven rollers 17A and 17C located at both ends of the row (approximately 180 degrees). For example, the transfer of the transport carriage 1 from one of the high-speed traveling section A1 and the low-speed traveling section A2 to the other is performed smoothly without difficulty. At this time, when transferring from the high speed travel section A1 to the low speed travel section A2, the portal movable body 16 including the driven rollers 17A to 17C is twisted around the rotation axis 20a and resists the biasing force of the coil spring 32. On the contrary, when moving from the low-speed travel section A2 to the high-speed travel section A1, the portal movable body 16 is twisted around the rotation axis 20a and rotates in the direction in which the urging force of the coil spring 32 acts.

スクリューシャフト3の回転により走行経路2に沿って走行せしめられる搬送台車1が中間軸受け12A〜12Cの位置を通過するとき、ローラーユニット15の従動ローラー17A〜17Cが、中間軸受け12A〜12Cの両側に隣接するスクリューシャフト単体9A,9B間、スクリューシャフト単体9B,9C間、及びスクリューシャフト単体9C,9D間における筒状体13間の隙間dを通過しなければならない。而して、図4に示すように、当該隙間dの羽根板14に沿った周方向長さ(角度)θ、換言すれば当該隙間dによって分断された羽根板14の分断長さ(角度)θは、当該隙間dの幅が中間軸受け12A〜12Cの板状の支持部38の厚さより少し広い程度の狭いものであるから、各従動ローラー17A〜17C間の周方向の間隔(ほぼ90度)よりも小さく、且つ周方向両端の従動ローラー17A,17C間の周方向の間隔(ほぼ180度)よりも十分に小さくなる。従って、従動ローラー17A〜17Cが中間軸受け12A〜12Cの位置での筒状体13間の隙間d(羽根板14の分断箇所)を通過するとき、3つの従動ローラー17A〜17Cは、一端側のローラーから1つずつ順番に筒状体13間の隙間d内に入り込むだけで、残りの2つの従動ローラーは、前記隙間dの上手側の羽根板14と係合するか、又は上手側の羽根板14と下手側の羽根板14とに跨がって各別に係合するか、若しくは下手側の羽根板14と係合することになり、3つの従動ローラー17A〜17Cは確実に羽根板14に沿った方向に保持されることになる。   When the transport carriage 1 driven along the travel path 2 by the rotation of the screw shaft 3 passes through the positions of the intermediate bearings 12A to 12C, the driven rollers 17A to 17C of the roller unit 15 are placed on both sides of the intermediate bearings 12A to 12C. It must pass through the gaps d between the cylindrical bodies 13 between the adjacent screw shafts 9A and 9B, between the screw shafts 9B and 9C, and between the screw shafts 9C and 9D. Thus, as shown in FIG. 4, the circumferential length (angle) θ of the gap d along the blade 14, in other words, the divided length (angle) of the blade 14 divided by the gap d. Since θ is narrow such that the width of the gap d is slightly larger than the thickness of the plate-like support portion 38 of the intermediate bearings 12A to 12C, the circumferential interval between the driven rollers 17A to 17C (approximately 90 degrees). ) And sufficiently smaller than the circumferential interval (approximately 180 degrees) between the driven rollers 17A and 17C at both ends in the circumferential direction. Therefore, when the driven rollers 17A to 17C pass through the gap d between the cylindrical bodies 13 at the positions of the intermediate bearings 12A to 12C (the part where the blade 14 is divided), the three driven rollers 17A to 17C By only entering the gap d between the cylindrical bodies 13 one by one from the rollers, the remaining two driven rollers engage with the upper blade plate 14 of the gap d or the upper blades. The plate 14 and the lower blade 14 are engaged with each other or engaged with the lower blade 14, and the three driven rollers 17 </ b> A to 17 </ b> C are reliably engaged with the blade 14. It will be held in the direction along.

若し、上記構造において、仮に3つの従動ローラー17A〜17Cの内の2つの従動ローラーが前記隙間dに入り込むほどに、当該隙間dの羽根板14に沿った周方向長さ(角度)θが大きいか、又は3つの従動ローラー17A〜17Cの羽根板14に沿った周方向の間隔が狭いときは、2つの従動ローラーが前記隙間dに入り込んだとき、残り1つの従動ローラーのみが羽根板14から推力を受けることになるので、この推力で、これら3つの従動ローラー17A〜17Cを軸支する門形可動体16が回転軸心20aの周りに回転して、前記隙間dに入り込んでいた従動ローラーの位置が本来の羽根板14に沿った位置から外れてしまい、隙間dに入り込んでいた従動ローラーが当該隙間dの上手側の羽根板14に無理なく円滑に係合することができなくなる。又、羽根板14に沿って2つの従動ローラーが門形可動体16に軸支されている構成を仮定した場合も、前記隙間dに入り込む従動ローラーは1つであっても、羽根板14に係合する従動ローラーも1つになるから、上記と同様の結果となり、隙間dに入り込んでいた従動ローラーが当該隙間dの上手側の羽根板14に無理なく円滑に係合することができなくなる。   In the above structure, the circumferential length (angle) θ along the blade 14 of the gap d is such that two of the three driven rollers 17A to 17C enter the gap d. When it is large or the distance between the three driven rollers 17A to 17C in the circumferential direction along the blade plate 14 is narrow, when the two driven rollers enter the gap d, only the remaining one driven roller is the blade plate 14. Because of this thrust, the portal movable body 16 that pivotally supports these three driven rollers 17A to 17C rotates around the rotation axis 20a, and the driven that has entered the gap d is driven by this thrust. The position of the roller deviates from the position along the original blade 14, and the driven roller that has entered the gap d smoothly and smoothly engages the blade 14 on the upper side of the gap d. Theft becomes impossible. Further, even when it is assumed that two driven rollers are axially supported by the portal movable body 16 along the blade plate 14, even if only one driven roller enters the gap d, the blade plate 14 Since there is only one driven roller to be engaged, the same result as described above is obtained, and the driven roller that has entered the gap d cannot be smoothly and smoothly engaged with the blade 14 on the upper side of the gap d. .

然るに上記本発明の構成によれば、スクリューシャフト3の羽根板14が前記隙間dによって分断される箇所(中間軸受け12A〜12Cの位置)を搬送台車1が通過するときも、3つの従動ローラー17A〜17Cは、常にその内の2つの従動ローラーが羽根板14に係合していることにより、確実に羽根板14に沿った方向に保持されているので、隙間dに入り込んだ従動ローラーが当該隙間dの上手側の羽根板14と先端と衝突したり無理な接触をするなどの現象を回避でき、搬送台車1をして当該隙間dのある箇所を円滑且つ確実に走行通過させることができるのである。   However, according to the above-described configuration of the present invention, the three driven rollers 17 </ b> A are also provided when the transport carriage 1 passes through a location where the blade plate 14 of the screw shaft 3 is divided by the gap d (positions of the intermediate bearings 12 </ b> A to 12 </ b> C). -17C is always held in the direction along the blade 14 by the fact that the two driven rollers are always engaged with the blade 14, the driven roller that has entered the gap d It is possible to avoid a phenomenon such as collision or excessive contact with the blade 14 on the upper side of the gap d and forcible contact, and the transport carriage 1 can be smoothly and reliably passed through the portion having the gap d. It is.

本発明のスクリューシャフト利用の搬送台車駆動装置は、作業対象のワークを直線走行経路上で比較的低速で連続搬送させるが、その搬送速度を区間ごとに変えなければならないような、各種製品の組立てラインなどにおいて活用できるものである。この場合、搬送台車上にワークを支持させることになるが、このワーク支持台の支柱部が床面に設けられたスリット内を移動するように、搬送台車の走行経路を床面下ピット内に配設することができる。   The conveyance cart drive device using the screw shaft of the present invention continuously conveys a work to be worked on a straight traveling path at a relatively low speed, but assembles various products such that the conveyance speed must be changed for each section. It can be used in a line. In this case, the work is supported on the transport carriage, and the travel route of the transport carriage is placed in the pit below the floor so that the column portion of the work support base moves in the slit provided on the floor. It can be arranged.

1 搬送台車
2 走行経路
3 スクリューシャフト
5 モーター
6 ガイドレール
9A〜9D スクリューシャフト単体
10a,10b スクリューシャフト両端の支軸
11A,11B 端部軸受け
12A〜12C 中間軸受け
13 筒状体
13a,13b 筒状端部
14 羽根板
15 ローラーユニット
16 門形可動体
17A〜17C 従動ローラー
19 ローラーユニット支持体
20 垂直支軸
20a 回転軸心
21 一対のローラー単体
29 吊下ボルト
31 付勢手段
32 捩じりコイルスプリング
37 中間軸受けの軸受け本体
38 中間軸受けの支持部
42,50 伝動軸
42a 突出端部
42b,42c 筒状スペーサー
42d 締結ナット
42e キー
42g 回転伝達用端部
43 端軸部
44 中継軸部
45 本体軸部
46,49a,49b 軸受け部材
47,48 連結部材
47a,48a 凹窪部
50 伝動軸
50a 回転伝達用突出軸部
51a〜53a ボルト
51b〜53b ナット
A1 高速走行区間
A2 低速走行区間
d 隙間
θ 隙間dの羽根板に沿った周方向長さ(角度)
DESCRIPTION OF SYMBOLS 1 Conveyance cart 2 Traveling path 3 Screw shaft 5 Motor 6 Guide rail 9A-9D Screw shaft single-piece | unit 10a, 10b Support shaft 11A, 11B end bearing 12A-12C Intermediate bearing 13 Cylindrical body 13a, 13b Cylindrical end Portion 14 Blade plate 15 Roller unit 16 Portal movable body 17A to 17C Follower roller 19 Roller unit support body 20 Vertical support shaft 20a Rotating shaft center 21 A pair of rollers 29 Suspension bolt 31 Energizing means 32 Torsion coil spring 37 Intermediate bearing body 38 Intermediate bearing support section 42, 50 Transmission shaft 42a Projection end section 42b, 42c Cylindrical spacer 42d Fastening nut 42e Key 42g Rotation transmission end section 43 End shaft section 44 Relay shaft section 45 Main body shaft section 46 49a, 49b shaft Receiving member 47, 48 Connecting member 47a, 48a Recessed portion 50 Transmission shaft 50a Protrusion shaft portion for rotation transmission 51a-53a Bolt 51b-53b Nut A1 High-speed traveling section A2 Low-speed traveling section d Clearance θ along the blades of clearance d Circumferential length (angle)

Claims (7)

搬送台車の走行経路に沿ってモーター駆動のスクリューシャフトが支承され、搬送台車には、前記スクリューシャフトに係合する従動ローラーが軸支された搬送台車の駆動装置において、前記スクリューシャフトは、複数本のスクリューシャフト単体を中間軸受けにより同心状に連結して構成され、搬送台車には、前記スクリューシャフトを軸方向から見たときに前記中間軸受けの当該スクリューシャフトから延出する支持部のある側とは反対側で、当該スクリューシャフトの軸心に対して直交する回転軸心の周りに揺動自在に軸支された可動体が設けられ、この可動体に前記従動ローラーが、前記スクリューシャフトを軸方向から見たときに、前記中間軸受けの当該スクリューシャフトから延出する支持部を含まない周方向領域内のスクリューシャフトの羽根板に沿った周方向少なくとも3箇所にそれぞれ軸支され、前記中間軸受けの両側のスクリューシャフト単体間を前記3つの従動ローラーが相対的に順次通過するとき、常に2つの従動ローラーがスクリューシャフトの羽根板に係合するように構成された、搬送台車の駆動装置。   A motor-driven screw shaft is supported along the travel path of the transport carriage, and the transport carriage is supported by a driven carriage that engages with the screw shaft. The screw shaft alone is concentrically connected by an intermediate bearing, and the transport carriage has a support portion extending from the screw shaft of the intermediate bearing when the screw shaft is viewed from the axial direction. Is provided on the opposite side with a movable body pivotably supported around a rotation axis orthogonal to the axis of the screw shaft, and the driven roller is pivoted on the screw shaft. When viewed from the direction, the screen in the circumferential region does not include the support portion extending from the screw shaft of the intermediate bearing. -When the three driven rollers are sequentially supported between the single screw shafts on both sides of the intermediate bearing, the two driven rollers are always screwed in at least three locations along the shaft blade plate. A drive device for a transport carriage configured to engage with a blade of a shaft. 前記周方向3つの従動ローラーのそれぞれは、スクリューシャフトの羽根板を挟む一対のローラー単体から構成されている、請求項1に記載の搬送台車の駆動装置。   Each of the said three circumferential direction driven rollers is a drive device of the conveyance trolley of Claim 1 comprised from a pair of roller single-piece | unit which pinches the blade | wing plate of a screw shaft. 前記可動体は、軸支される前記3つの従動ローラーがスクリューシャフトの羽根板に沿って並ぶ初期位置に付勢保持する付勢手段が設けられている、請求項1又は2に記載の搬送台車の駆動装置。   3. The transport carriage according to claim 1, wherein the movable body is provided with a biasing means that biases and holds the three driven rollers that are pivotally supported at an initial position where the three driven rollers are aligned along the blade plate of the screw shaft. Drive device. 前記3つの従動ローラーは、前記スクリューシャフトを軸方向から見たときに、前記可動体の回転軸心位置と、当該回転軸心位置からそれぞれ正逆両方向にほぼ90度離れた位置とに配設されている、請求項1〜3の何れか1項に記載の搬送台車の駆動装置。   The three driven rollers are disposed at a rotational axis position of the movable body and a position approximately 90 degrees away from the rotational axis position in both forward and reverse directions when the screw shaft is viewed from the axial direction. The drive apparatus of the conveyance trolley in any one of Claims 1-3 currently performed. 前記中間軸受けの支持部は、軸受け本体の軸心方向の幅よりも薄く且つスクリューシャフトの軸心方向に対し直交する向きの板材で構成され、この中間軸受けの支持部からスクリューシャフトの軸心方向に突出する軸受け本体に、スクリューシャフト単体の筒状端部が被さっている、請求項1〜4の何れか1項に記載の搬送台車の駆動装置。   The support portion of the intermediate bearing is formed of a plate material that is thinner than the width of the bearing body in the axial direction and orthogonal to the axial direction of the screw shaft, and the axial direction of the screw shaft extends from the support portion of the intermediate bearing. The drive device of the conveyance trolley in any one of Claims 1-4 with which the cylindrical end part of the screw shaft single-piece | unit has covered the bearing main body which protrudes in this. 前記中間軸受けの軸受け本体に筒状端部が被さるスクリューシャフト単体であって、前記中間軸受けの少なくとも片側に位置するスクリューシャフト単体は、前記軸受け本体から突出し且つ反対側のスクリューシャフト単体と一体に回転する伝動軸に対して軸心方向に嵌脱自在に取り付けられる端軸部と、一端が次の中間軸受けで支承される本体軸部と、この本体軸部と前記端軸部とを繋ぐ中継軸部とから構成され、前記中継軸部は、前記本体軸部と前記端軸部とに対してスクリューシャフト軸心方向に対し半径方向に嵌脱自在に取り付けられている、請求項5に記載の搬送台車の駆動装置。   A single screw shaft whose cylindrical end covers the bearing body of the intermediate bearing, and the single screw shaft positioned on at least one side of the intermediate bearing protrudes from the bearing body and rotates integrally with the screw shaft on the opposite side. An end shaft portion that is detachably attached to the transmission shaft in the axial direction, a main body shaft portion whose one end is supported by the next intermediate bearing, and a relay shaft that connects the main body shaft portion and the end shaft portion. The relay shaft portion is attached to the main body shaft portion and the end shaft portion so as to be detachable in the radial direction with respect to the axial direction of the screw shaft. Drive device for transport cart. 前記伝動軸には、前記端軸部から前記中継軸部の方に突出する回転伝達用端部が設けられ、前記本体軸部には、前記中継軸部の方に同心状に突出する回転伝達用突出軸部が設けられ、前記中継軸部の両端には、前記伝動軸の回転伝達用端部と前記本体軸部の回転伝達用突出軸部とに対して半径方向に嵌脱自在な回転伝達用凹窪部が設けられ、これら両端の回転伝達用凹窪部が前記伝動軸の回転伝達用端部と前記本体軸部の回転伝達用突出軸部とに嵌合した中継軸部の両端を前記伝動軸の回転伝達用端部と前記本体軸部の回転伝達用突出軸部とに固定する固定具が設けられている、請求項6に記載の搬送台車の駆動装置。   The transmission shaft is provided with a rotation transmission end portion protruding from the end shaft portion toward the relay shaft portion, and the main body shaft portion is provided with a rotation transmission projecting concentrically toward the relay shaft portion. The projecting shaft portion is provided, and at both ends of the relay shaft portion, the rotation transmission end of the transmission shaft and the rotation transmission projecting shaft portion of the main body shaft portion can be fitted and detached in the radial direction. Both ends of the relay shaft portion provided with a transmission recess portion, and the rotation transmission recess portions at both ends fitted to the rotation transmission end portion of the transmission shaft and the rotation transmission protruding shaft portion of the main body shaft portion. The driving device of the transport carriage according to claim 6, further comprising a fixing member that fixes the rotation transmission end portion of the transmission shaft to the rotation transmission protruding shaft portion of the main body shaft portion.
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