JP2020011835A

JP2020011835A - Guide mechanism of lifting device

Info

Publication number: JP2020011835A
Application number: JP2018136208A
Authority: JP
Inventors: 匠後藤; Takumi Goto
Original assignee: Daido Steel Co Ltd
Current assignee: Daido Steel Co Ltd
Priority date: 2018-07-19
Filing date: 2018-07-19
Publication date: 2020-01-23
Anticipated expiration: 2038-07-19
Also published as: JP7107053B2

Abstract

To provide a guide mechanism of a lifting device capable of appropriately guiding a guide roller while being brought into contact with a support column even when a contact portion between the support column and the guide roller is abraded.SOLUTION: A roller unit 23 supporting a side surface of a mast 16 includes a roller attachment member 24 that is detachably provided on an outside surface of a mast guide 21 through which the mast 16 penetrates. In the roller attachment member 24, a bearing member 25 is supported to freely approach or separate from the side surface of the mast 16. Guide rollers 26, 26 are rotatably supported by shaft parts 33, 33 of the bearing member 25. A part of each guide roller 26 faces inside from an opening 21a formed in the mast guide 21 so as to contact with a rail part 16a of the mast 16. The guide roller 26 is brought into contact with the rail part 16a by the energizing force of compression coil springs 34, 35, 35 that is elastically interposed between the bearing member 25 and the roller attachment member 24.SELECTED DRAWING: Figure 4

Description

本発明は、支柱に設けた支持手段で物品を支持して昇降する昇降装置のガイド機構に関するものである。 The present invention relates to a guide mechanism of an elevating device that elevates and lowers an article by supporting the article by a supporting means provided on a column.

圧延工場では、ビレットの如き長尺な鋼材等の被搬送物(物品)を搬送する手段として、マスト式クレーンが好適に使用されている。このマスト式クレーンは、自走式の横長の台車に、複数のマスト(支柱)が上下方向に昇降自在に支持されると共に、複数のマストの下端に取り付けた横長のビームに、複数の荷役治具(支持手段)が設けられている。荷役治具は、Ｌ字形のクローが用いられ、複数のクローで被搬送物の下面を支え受けた状態でマストを昇降装置によって上昇することで被搬送物を持ち上げる。そして、台車を走行して所定のストック場所まで被搬送物を搬送した後、マストを昇降装置によって下降することで被搬送物をストック場所に置くよう構成される。 In a rolling mill, a mast type crane is suitably used as a means for transporting an article (article) to be transported such as a long steel material such as a billet. In this mast type crane, a plurality of masts (posts) are supported on a self-propelled horizontally long bogie so as to be able to move up and down vertically, and a plurality of cargo handling Tool (support means) is provided. The cargo handling jig uses an L-shaped claw, and lifts the conveyed object by raising the mast by an elevating device while supporting the lower surface of the conveyed object with the plurality of claws. Then, after the transported object is transported to the predetermined stock location by traveling on the trolley, the mast is lowered by the elevating device to place the transported article at the stock location.

前記マスト式クレーンでは、台車における各マストの対応する位置に、平断面が矩形状の該マストの４つの側面の夫々に接触して回転する複数のガイドローラを備えたガイド機構を設け、マストを複数のガイドローラで案内して昇降を安定化するよう構成されている(例えば、特許文献１参照)。 In the mast type crane, a guide mechanism including a plurality of guide rollers rotating in contact with each of the four side surfaces of the mast having a rectangular cross section is provided at a position corresponding to each mast on the bogie, and the mast is provided. It is configured to be guided by a plurality of guide rollers to stabilize the ascent and descent (for example, see Patent Document 1).

特開２００９−１０２１１６号公報JP 2009-102116 A

前記マスト式クレーンでは、マストの昇降に際して該マストにガイドローラが接触するため、マストおよびガイドローラの接触部分が経時的に摩耗し、マストとガイドローラとの間に隙間を生ずる。また、マスト式クレーンでは、クローで被搬送物を持ち上げた状態で、前記台車の走行を開始する際や、被搬送物をストック場所まで搬送した台車を停止する際等の台車の加減速時には、被搬送物を保持しているマストに慣性力が働く。このため、摩耗によってマストとガイドローラとの間の隙間が大きくなると、前記慣性力によってマストが搬送方向の前後に揺れ、ガイドローラの軸受や、該ガイドローラを台車に取り付けるための固定手段等に大きな衝撃が加わって故障の原因となる問題があった。また、ガイドローラとマストとの隙間が大きくなると、ガイドローラで適正に案内されないマストが斜めに昇降することで、該マストがガイドローラ以外の台車の固定部分に接触して抵抗が増大し、これに伴って前記昇降装置の電気的負荷が大きくなって電気故障が発生するおそれもある。 In the mast type crane, the guide roller comes into contact with the mast when the mast is moved up and down, so that the contact portion between the mast and the guide roller wears over time, and a gap is generated between the mast and the guide roller. Further, in the mast type crane, when the transported object is lifted by the claw, when starting the traveling of the bogie, or when accelerating or decelerating the bogie such as when stopping the bogie that transported the transported object to the stock location, Inertial force acts on the mast holding the object. For this reason, when the gap between the mast and the guide roller increases due to wear, the mast swings back and forth in the transport direction due to the inertial force, and the guide mast oscillates in the bearing of the guide roller and fixing means for attaching the guide roller to the carriage. There was a problem that a large impact was applied and caused a failure. Further, when the gap between the guide roller and the mast becomes large, the mast that is not properly guided by the guide roller rises and falls obliquely, so that the mast comes into contact with a fixed portion of the bogie other than the guide roller, thereby increasing resistance. As a result, the electric load of the lifting device may increase, and an electrical failure may occur.

ここで、従来のガイド機構は、マストに対してガイドローラが接触するように、該ガイドローラの台車に対する取付け位置を調整するためのシムを備えており、マストとガイドローラとの隙間が大きくなった場合は、厚みの異なるシムに交換することで、マストに対してガイドローラを接触させる調整は可能になっている。しかしながら、シムの交換に際してはガイド機構を台車に対して取り外したり取り付ける作業が必要となって時間が掛かる問題があると共に、定量的でシビアな調整は難しいものであった。また、マストとガイドローラとの隙間が、不具合が発生する程度に大きくなっていることを見落としていたり、シムの交換を怠ったりすると、更に隙間が大きくなって問題が重大化するおそれがある。 Here, the conventional guide mechanism includes a shim for adjusting a mounting position of the guide roller to the carriage so that the guide roller comes into contact with the mast, and a gap between the mast and the guide roller is increased. In this case, it is possible to adjust the guide roller to contact the mast by replacing the shim with a shim having a different thickness. However, when replacing the shim, there is a problem that it takes time to remove and attach the guide mechanism to and from the cart, and it is difficult to perform quantitative and severe adjustment. In addition, if it is overlooked that the gap between the mast and the guide roller is large enough to cause a problem, or if the shim is neglected, the gap may be further increased and the problem may become serious.

すなわち本発明は、前述した従来技術に内在する前記課題に鑑み、これを好適に解決するべく提案されたものであって、支柱とガイドローラとの接触部分が摩耗しても、支柱にガイドローラを当接して適切に案内することができる昇降装置のガイド機構を提供することを目的とする。 That is, the present invention has been proposed in view of the problems inherent in the prior art described above, and has been proposed to appropriately solve the problem.Even if the contact portion between the support and the guide roller is worn, the support roller may have a guide roller. It is an object of the present invention to provide a guide mechanism of an elevating device capable of abutting and guiding appropriately.

前記課題を克服し、所期の目的を達成するため、請求項１の発明に係る昇降装置のガイド機構は、
物品(12)を支持する支持手段(18)を備えた支柱(16)を上下方向に昇降する昇降装置(13)のガイド機構(22)であって、
前記支柱(16)における上下方向と交差する方向で対向する少なくとも２つの側面の夫々に対向して配置されたローラユニット(23)を備え、
前記ローラユニット(23)は、
前記支柱(16)の側面に対して接近・離間自在で、かつ回転自在に支持されたガイドローラ(26)と、
前記ガイドローラ(26)を支柱(16)の側面に向けて付勢する付勢手段(34,35)とを備え、
前記ガイドローラ(26)は、前記付勢手段(34,35)の付勢力によって前記支柱(16)の側面に当接して該支柱(16)の昇降に伴い回転して案内するよう構成したことを要旨とする。
請求項１の発明では、ガイドローラを、支柱に対して接近・離間自在な状態で支持すると共に付勢手段によって支柱に接近する方向に付勢しているので、支柱とガイドローラとの接触部分が摩耗しても、該ガイドローラを、付勢手段の付勢力によって支柱に当接して案内することができる。従って、支柱とガイドローラとの隙間が大きくなって支柱が揺れることに起因する、ガイドローラの軸受や固定手段等が破損する等の故障の発生を防止することができる。また、ガイドローラは、付勢手段によって自動的に支柱に当接するように位置調整されるので、支柱とガイドローラとの隙間が、不具合が発生する程度に大きくなっていることを見落として問題が重大化するのを防ぐことができる。
更に、台車の加減速時に支柱に働く慣性力によって該支柱が揺れようとする際に、ガイドローラの軸受や固定手段等に加わる負荷を付勢手段によって緩衝することができ、該軸受や固定手段が破損等する故障の発生をより抑制し得る。 In order to overcome the problem and achieve the intended purpose, the guide mechanism of the lifting device according to the first aspect of the present invention includes:
A guide mechanism (22) of an elevating device (13) for vertically elevating a column (16) provided with a support means (18) for supporting an article (12),
A roller unit (23) disposed opposite to each of at least two side surfaces of the support (16) that face each other in a direction intersecting the vertical direction,
The roller unit (23)
A guide roller (26) that is freely rotatable toward and away from the side surface of the column (16), and is rotatably supported;
Biasing means (34, 35) for biasing the guide roller (26) toward the side surface of the column (16),
The guide roller (26) is configured to be brought into contact with the side surface of the support (16) by the urging force of the urging means (34, 35) to rotate and guide as the support (16) moves up and down. Is the gist.
According to the first aspect of the present invention, since the guide roller is supported so as to be able to approach and separate from the column and is urged by the urging means in the direction approaching the column, a contact portion between the column and the guide roller is provided. Even if the roller is worn, the guide roller can be guided in contact with the support by the urging force of the urging means. Therefore, it is possible to prevent a failure such as damage to the bearings and fixing means of the guide roller due to the gap between the support and the guide roller becoming large and the support swinging. Also, since the position of the guide roller is automatically adjusted by the urging means so as to abut against the support, it is difficult to overlook that the gap between the support and the guide roller is large enough to cause a problem. It can prevent it from becoming serious.
Further, when the column is going to swing due to the inertial force acting on the column when the bogie is accelerated or decelerated, the load applied to the bearings and fixing means of the guide roller can be buffered by the urging means, and the bearing and fixing means This can further suppress the occurrence of a failure such as breakage.

請求項２の発明は、
前記ローラユニット(23)は、
前記支柱(16)の側面から離間する支持部(31)と、
該支持部(31)と支柱(16)の側面との間に位置して、該支柱(16)の側面に対して接近・離間自在な軸受部材(25)とを備え、
前記軸受部材(25)に設けられて前記支柱(16)の側面に対する接近・離間方向と交差する方向に離間する一対の軸部(33,33)の夫々に、前記ガイドローラ(26)が回転自在に支持され、
前記支持部(31)と軸受部材(25)との間に前記付勢手段(34,35)が弾力的に介在され、
前記付勢手段(34,35)の付勢力に抗して前記軸受部材(25)が前記支柱(16)の側面に対する離間方向へ移動するのを規制する位置を、調整可能な調整手段(36)を備えたことを要旨とする。
請求項２の発明では、付勢手段の付勢力に抗して軸受部材が支柱の側面に対する離間方向へ移動するのを規制する位置を、調整手段によって調整することで、支柱の揺れが大きくなるのを規制することができる。 The invention of claim 2 is
The roller unit (23)
A support portion (31) separated from the side surface of the support (16),
A bearing member (25) positioned between the support portion (31) and the side surface of the column (16), and capable of approaching and separating from the side surface of the column (16);
The guide roller (26) rotates on each of a pair of shafts (33, 33) provided on the bearing member (25) and separated in a direction intersecting with the approach / separation direction with respect to the side surface of the support (16). Freely supported,
The biasing means (34, 35) is elastically interposed between the support part (31) and the bearing member (25),
Adjustable adjusting means (36) that adjusts the position for restricting the bearing member (25) from moving in the direction away from the side surface of the support (16) against the urging force of the urging means (34, 35). ).
According to the second aspect of the present invention, the position of the bearing member that restricts the movement of the bearing member in the direction away from the side surface of the column against the urging force of the urging unit is adjusted by the adjusting unit, thereby increasing the swing of the column. Can be regulated.

請求項３の発明は、
前記付勢手段(34,35)は、前記軸受部材(25)における一対の軸部(33,33)の中間に位置する第１付勢手段(34)と、該第１付勢手段(34)と各軸部(33)との間に位置する第２付勢手段(35)とからなり、
前記第１付勢手段(34)の付勢力を、前記第２付勢手段(35)の付勢力より大きく設定したことを要旨とする。
請求項３の発明では、一対のガイドローラの中間に位置する第１付勢手段の付勢力を、第２付勢手段の付勢力より大きくすることで、一対のガイドローラを支柱の側面に均等に当接して、一方のガイドローラと支柱との接触部分のみが変摩耗するのを防いで、一対のガイドローラによって支柱を安定して案内することができる。 The invention of claim 3 is
The urging means (34, 35) includes a first urging means (34) located between the pair of shafts (33, 33) in the bearing member (25), and a first urging means (34). ) And second biasing means (35) located between each shaft (33),
The gist is that the urging force of the first urging means (34) is set to be larger than the urging force of the second urging means (35).
According to the third aspect of the present invention, the biasing force of the first biasing means located in the middle of the pair of guide rollers is made larger than the biasing force of the second biasing means, so that the pair of guide rollers are evenly distributed on the side surface of the support. To prevent the contact portion between one of the guide rollers and the strut from being deformed and worn, so that the strut can be stably guided by the pair of guide rollers.

請求項４の発明は、
前記軸受部材(25)は、前記支柱(16)の側面に対する接近・離間方向と直交する断面が多角形に形成された本体部(32)を備え、該本体部(32)に対して前記軸部(33,33)は、多角形断面の中央から偏倚して設けられ、
前記支柱(16)の側面に対向する前記本体部(32)の面を変えるように該本体部(32)の向きを変更することで、前記ガイドローラ(26,26)が付勢手段(34,35)によって支柱(16)の側面に当接する付勢力を調整し得るよう構成したことを要旨とする。
請求項４の発明では、支柱とガイドローラとの接触部分の摩耗の程度に応じて、軸受部材の本体部の向きを変更することで、付勢手段によって適正な付勢力でガイドローラを支柱に当接することができる。すなわち、支柱およびガイドローラの摩耗が進行し、ガイドローラが付勢手段によって支柱の側面に当接する付勢力が大きく変化した場合は、部品交換することなく軸受部材の本体部の向きを変更するだけで、付勢手段による付勢力を適正に調整することができる。 The invention of claim 4 is
The bearing member (25) includes a main body (32) having a polygonal cross section perpendicular to the approach / separation direction with respect to the side surface of the support (16), and the shaft is provided with respect to the main body (32). The part (33, 33) is provided offset from the center of the polygonal cross section,
By changing the direction of the main body (32) so as to change the surface of the main body (32) facing the side surface of the support (16), the guide rollers (26, 26) are biased by the urging means (34). , 35) to adjust the biasing force of contacting the side surface of the column (16).
According to the fourth aspect of the present invention, the direction of the main body of the bearing member is changed in accordance with the degree of wear of the contact portion between the support and the guide roller, so that the guide roller is connected to the support with an appropriate urging force by the urging means. You can abut. In other words, if the wear of the support and the guide roller progresses and the biasing force of the guide roller in contact with the side surface of the support by the biasing means changes greatly, the direction of the main body of the bearing member is simply changed without replacing parts. Thus, the urging force of the urging means can be appropriately adjusted.

本発明に係る昇降装置のガイド機構によれば、ガイドローラを支柱に当接するように付勢しているので、支柱とガイドローラとの接触部分が摩耗しても、ガイドローラを支柱に常に当接させて該支柱を適切に案内することができる。 According to the guide mechanism of the elevating device according to the present invention, since the guide roller is urged to abut on the support, the guide roller is always in contact with the support even if the contact portion between the support and the guide roller is worn. The support can be appropriately guided by the contact.

実施例に係る昇降装置を備えたマスト式クレーンを示す概略図である。It is the schematic which shows the mast type crane provided with the raising / lowering apparatus which concerns on an Example. 実施例に係るガイド機構を示す平面図である。FIG. 3 is a plan view showing a guide mechanism according to the embodiment. 実施例に係るローラユニットを分解してマストガイドに取り付ける前の状態を示す概略平断図である。It is a schematic plan view showing the state before disassembling the roller unit according to the example and attaching it to the mast guide. 実施例に係るローラユニットをマストガイドに取り付けた状態で示す概略平断面図である。FIG. 4 is a schematic plan sectional view showing a state where the roller unit according to the embodiment is attached to a mast guide. 実施例に係る軸受部材を示すものであって、(ａ)は平面図、(ｂ)は(ａ)のＡ−Ａ線断面図、(ｃ)は(ａ)のＢ−Ｂ線断面図である。It is a figure which shows the bearing member which concerns on an Example, (a) is a top view, (b) is AA sectional drawing of (a), (c) is BB sectional drawing of (a). is there. 実施例に係るマストガイドに取り付けたローラユニットを示す概略正面図である。It is a schematic front view showing a roller unit attached to a mast guide concerning an example. 実施例に係るローラ取着部材に軸受部材を取り付けた状態を示す説明図であって、(ａ)は本体部の第３面をマスト側に向けた状態を示し、(ｂ)は本体部の第２面をマスト側に向けた状態を示し、(ｃ)は本体部の第１面をマスト側に向けた状態を示している。It is explanatory drawing which shows the state which attached the bearing member to the roller attachment member which concerns on an Example, (a) shows the state which turned the 3rd surface of the main-body part to the mast side, (b) shows the main-body part. A state where the second surface is directed to the mast side is shown, and (c) shows a state where the first surface of the main body is directed to the mast side.

次に、本発明に係る昇降装置のガイド機構につき、好適な実施例を挙げて、添付図面を参照しながら以下説明する。 Next, a guide mechanism of an elevating device according to the present invention will be described below with reference to the accompanying drawings by taking a preferred embodiment.

図１は、実施例に係る昇降装置を備えたマスト式クレーンを示し、該マスト式クレーンは、圧延工場(建屋)の天井付近に敷設された一対のレール１０,１０間に横架された横長の台車１１と、該台車１１に配設されて、ビレットの如き長尺な鋼材等の被搬送物(物品)１２を支持して昇降する昇降装置１３とを備える。台車１１は、図示しないモータ等の駆動手段によって、レール１０,１０に沿って自走するよう構成される。なお、圧延工場では、マスト式クレーンは、例えば、熱間圧延された鋼材(被搬送物１２)を、圧延ラインから所定のストック場所に搬送するために使用される。 FIG. 1 shows a mast-type crane provided with a lifting device according to an embodiment, and the mast-type crane is a horizontally long mast crane laid between a pair of rails 10 laid near a ceiling of a rolling mill (building). And a lifting / lowering device 13 which is disposed on the vehicle 11 and supports and raises and lowers a transferred object (article) 12 such as a long steel material such as a billet. The carriage 11 is configured to run along the rails 10, 10 by driving means such as a motor (not shown). In a rolling mill, a mast crane is used, for example, to transport hot-rolled steel (transported object 12) from a rolling line to a predetermined stock location.

前記昇降装置１３は、図１に示す如く、前記台車１１に対して上下方向に昇降自在に支持された昇降部１４と、台車１１に配設された巻上機１５とを備える。昇降部１４は、台車１１の長手方向に離間して上下方向に昇降自在に支持された複数(実施例では２本)のマスト(支柱)１６と、複数のマスト１６の下端に配設されて台車１１の長手方向に沿って延在するビーム１７と、該ビーム１７に配設された複数(実施例では４つ)の支持手段としての荷役治具１８とを備える。実施例では、荷役治具１８としてＬ字形のクローが用いられ、複数のクロー１８の水平部に被搬送物１２を載置して搬送するよう構成される。また、前記巻上機１５は、前記台車１１およびビーム１７に回転自在に支持された複数の滑車１９に巻き掛けたワイヤ２０を、モータによって巻き取り・巻き戻し得るよう構成されており、ワイヤ２０を巻き取ることで台車１１に対して昇降部１４を上昇すると共に、ワイヤ２０を巻き戻すことで台車１１に対して昇降部１４を下降する。 As shown in FIG. 1, the elevating device 13 includes an elevating unit 14 supported to be vertically movable with respect to the trolley 11, and a hoisting machine 15 disposed on the trolley 11. The elevating unit 14 is provided at a plurality of (two in the embodiment) masts (posts) 16 which are supported in a vertically movable manner while being spaced apart in the longitudinal direction of the carriage 11, and provided at lower ends of the plurality of masts 16. The beam 17 includes a beam 17 extending along the longitudinal direction of the carriage 11, and a plurality of (four in this embodiment) cargo handling jigs 18 provided on the beam 17 as support means. In the embodiment, an L-shaped claw is used as the cargo handling jig 18, and the transported object 12 is placed on the horizontal portions of the plurality of claws 18 and transported. The hoisting machine 15 is configured so that a wire 20 wound around a plurality of pulleys 19 rotatably supported by the carriage 11 and the beam 17 can be wound and unwound by a motor. The lifting unit 14 is moved up with respect to the trolley 11 by winding the wire, and the lifting unit 14 is lowered with respect to the trolley 11 by unwinding the wire 20.

前記台車１１には、図１に示す如く、その長手方向に離間して上下方向に延在する角筒状のマストガイド２１が設けられ、各マストガイド２１を上下方向に貫通する前記マスト１６を、マストガイド２１に配設したガイド機構２２によって台車１１に対して上下方向に昇降可能に支持するよう構成される。各マスト１６は、図２に示す如く、横断面が略正方形で縦長の角筒状の金属構造体であり、４つの側面の夫々に、各側面の幅方向に離間して一対のレール部１６ａ,１６ａが、上下方向に延在するように設けられている。 As shown in FIG. 1, the cart 11 is provided with a mast guide 21 in the form of a rectangular tube extending in the up-down direction while being separated in the longitudinal direction, and the mast 16 penetrating through each mast guide 21 in the up-down direction is provided. The carriage 11 is supported by the guide mechanism 22 provided on the mast guide 21 so as to be able to move up and down in the vertical direction. As shown in FIG. 2, each mast 16 is a vertically elongated rectangular tube-shaped metal structure having a substantially square cross section, and a pair of rail portions 16 a separated from each other on the four side surfaces in the width direction of each side surface. , 16a are provided to extend in the up-down direction.

前記ガイド機構２２は、図１に示す如く、前記マストガイド２１における台車１１の上側に臨む位置および下側に臨む位置の夫々に配設されており、前記マスト１６は、上下方向に離間する２箇所においてガイド機構２２,２２によって支持される。各ガイド機構２２は、図２に示す如く、マストガイド２１におけるマスト１６の各側面に対応する面の夫々に、ローラユニット２３が対向して設けられる。各ローラユニット２３は、マストガイド２１に着脱自在に配設されるローラ取着部材２４と、該ローラ取着部材２４に支持された軸受部材２５と、該軸受部材２５に回転自在に支持された一対のガイドローラ２６,２６とを備える。マストガイド２１には、各ローラユニット２３のガイドローラ２６,２６に対応する位置に、内外方向に貫通する開口部２１ａ,２１ａが設けられ、各ガイドローラ２６は、一部が対応する開口部２１ａからマストガイド２１の内側に臨んで、該ガイドローラ２６の周面がマスト１６の前記レール部１６ａに当接し得るよう構成される。すなわち、マスト１６は、各側面の夫々が２つのガイドローラ２６,２６に当接した状態で、上下方向に昇降自在に支持される。そして、前記巻上機１５によって昇降部１４が昇降する際には、周面がレール部１６ａに当接するガイドローラ２６が、マスト１６の昇降に伴って回転する。 As shown in FIG. 1, the guide mechanism 22 is disposed at a position facing the upper side and a position facing the lower side of the carriage 11 in the mast guide 21, and the mast 16 is vertically separated from the carriage 2. It is supported by the guide mechanisms 22, 22 at points. As shown in FIG. 2, each guide mechanism 22 is provided with a roller unit 23 facing each surface of the mast guide 21 corresponding to each side surface of the mast 16. Each roller unit 23 is rotatably supported by the roller mounting member 24, which is detachably disposed on the mast guide 21, a bearing member 25 supported by the roller mounting member 24, and the bearing member 25. A pair of guide rollers 26, 26; The mast guide 21 is provided with openings 21 a, 21 a penetrating inward and outward at positions corresponding to the guide rollers 26, 26 of each roller unit 23, and each guide roller 26 has an opening 21 a partially corresponding to the opening 21 a. The inner surface of the mast guide 21 faces the inside of the mast guide 21 so that the peripheral surface of the guide roller 26 can contact the rail portion 16 a of the mast 16. That is, the mast 16 is supported so as to be able to move up and down in the vertical direction in a state where each side surface is in contact with the two guide rollers 26 and 26. When the lifting unit 14 is moved up and down by the hoisting machine 15, the guide roller 26 whose peripheral surface is in contact with the rail 16 a rotates as the mast 16 moves up and down.

前記ローラ取着部材２４は、図７に示す如く、一方に開放する断面がコ字状に形成された部材であって、ローラ取着部材２４は、開口がマストガイド２１の側面を向く姿勢で、該マストガイド２１の外側に固定手段２７によって着脱自在に固定される。固定手段２７は、図３、図４に示す如く、軸方向の一端部側にネジ部２８ａを備えると共に、他端部にネジ孔２８ｂが形成された一対のネジ部材２８,２８と、各ネジ部材２８の一端部をマストガイド２１に固定するロックナット２９と、各ネジ部材２８の他端部をローラ取着部材２４に固定するボルト３０とを備える。マストガイド２１の側面には、前記開口部２１ａ,２１ａの間において、幅方向に離間して２つのネジ孔２１ｂ,２１ｂが形成されており、各ネジ孔２１ｂにネジ部材２８のネジ部２８ａを外側から螺挿した状態で、マストガイド２１の内側に突出するネジ部２８ａにロックナット２９を螺合することで、ネジ部材２８は、マストガイド２１の外側に向けて所定長さで延出する状態で該マストガイド２１に固定される。また、ローラ取着部材２４におけるマストガイド２１の側面と対向する側壁３１には、マストガイド２１に固定した各ネジ部材２８と対応する位置に通孔３１ａが形成されており、各通孔３１ａに側壁３１の外側から挿通したボルト３０のネジ部をネジ部材２８のネジ孔２８ｂに螺挿することで、ローラ取着部材２４に対してネジ部材２８の他端部が固定される。すなわち、ローラ取着部材２４は、マストガイド２１の側面の外側に、該ローラ取着部材２４の側壁３１がマストガイド２１の側面から所定長さだけ離間した位置に対向するように、固定手段２７によって位置決め固定される。 As shown in FIG. 7, the roller mounting member 24 is a member having a U-shaped cross section that opens to one side, and the roller mounting member 24 is positioned so that the opening faces the side surface of the mast guide 21. It is detachably fixed to the outside of the mast guide 21 by fixing means 27. As shown in FIGS. 3 and 4, the fixing means 27 includes a pair of screw members 28, 28 having a screw portion 28a at one end in the axial direction and a screw hole 28b at the other end. A lock nut 29 for fixing one end of the member 28 to the mast guide 21 and a bolt 30 for fixing the other end of each screw member 28 to the roller attachment member 24 are provided. Two screw holes 21b, 21b are formed on the side surface of the mast guide 21 between the openings 21a, 21a so as to be spaced apart from each other in the width direction. A screw portion 28a of the screw member 28 is formed in each screw hole 21b. By screwing a lock nut 29 into a screw portion 28a protruding inside the mast guide 21 in a state of being screwed from the outside, the screw member 28 extends a predetermined length toward the outside of the mast guide 21. In this state, it is fixed to the mast guide 21. Further, a through hole 31a is formed at a position corresponding to each screw member 28 fixed to the mast guide 21 on a side wall 31 of the roller attachment member 24 facing the side surface of the mast guide 21, and a through hole 31a is formed in each of the through holes 31a. The other end of the screw member 28 is fixed to the roller attachment member 24 by screwing the screw portion of the bolt 30 inserted from the outside of the side wall 31 into the screw hole 28 b of the screw member 28. That is, the roller attaching member 24 is fixed to the outside of the side surface of the mast guide 21 so that the side wall 31 of the roller attaching member 24 faces a position separated by a predetermined length from the side surface of the mast guide 21. Is positioned and fixed.

前記軸受部材２５は、図５に示す如く、角柱状の本体部３２と、該本体部３２における長手方向の両端から延出する円柱状の軸部３３,３３とを備え、該軸受部材２５は、前記ローラ取着部材２４に形成された断面矩形凹状の収容部２４ａに本体部３２を嵌め込むことで(図７参照)、回転が規制された状態でローラ取着部材２４に取り付けられる。軸受部材２５の本体部３２を収容部２４ａに嵌め込んだ状態で、図４に示す如く、該軸受部材２５の両軸部３３,３３はローラ取着部材２４の外側に延出し、該軸部３３,３３に、ガイドローラ２６,２６が回転自在に支持される。なお、軸部３３に対してガイドローラ２６は、Ｃ止め輪等の抜け止め部材(図示せず)によって抜け止めされる。 As shown in FIG. 5, the bearing member 25 includes a prismatic body 32 and columnar shafts 33, 33 extending from both ends in the longitudinal direction of the body 32. The main body 32 is fitted into the accommodating portion 24 a having a rectangular cross section formed on the roller attaching member 24 (see FIG. 7), whereby the roller attaching member 24 is attached to the roller attaching member 24 in a state where rotation is restricted. In a state where the main body 32 of the bearing member 25 is fitted in the housing portion 24a, as shown in FIG. 4, both shaft portions 33, 33 of the bearing member 25 extend outside the roller attaching member 24, and Guide rollers 26, 26 are rotatably supported by 33, 33. The guide roller 26 is prevented from coming off the shaft 33 by a retaining member (not shown) such as a C retaining ring.

前記軸受部材２５の本体部３２は、図５(ｂ),(ｃ)に示す如く、短手方向の断面が略正方形に形成された部材であって、該本体部３２の短手方向の長さは、前記ローラ取着部材２４をマストガイド２１に取り付け固定した状態で、該マストガイド２１の側面とローラ取着部材２４の側壁３１との間の対向間隔より短かく設定されており、軸受部材２５は、前記収容部２４ａ内で短手方向に移動可能に構成される。すなわち、軸受部材２５は、ローラ取着部材２４に、前記マスト１６の側面に対して接近・離間自在に支持される。そして、一対のガイドローラ２６,２６は、マスト１６の側面に対する接近・離間方向と交差する方向に離間して軸受部材２５に回転自在に支持されている。また、本体部３２には、前記各ネジ部材２８と対応する位置の夫々に、該ネジ部材２８が貫通する挿通孔３２ａが形成されており、軸受部材２５は、挿通孔３２ａ,３２ａを貫通する２つのネジ部材２８,２８に沿ってマスト１６の側面に対して接近・離間移動し得るよう構成される。 As shown in FIGS. 5B and 5C, the main body 32 of the bearing member 25 is a member having a substantially square cross section in the short direction. The distance between the side surfaces of the mast guide 21 and the side wall 31 of the roller mounting member 24 is set shorter than the distance between the side surfaces of the mast guide 21 and the roller mounting member 24 in a state where the roller mounting member 24 is fixed to the mast guide 21. The member 25 is configured to be movable in the lateral direction in the housing portion 24a. That is, the bearing member 25 is supported by the roller attachment member 24 so as to be able to approach and separate from the side surface of the mast 16. The pair of guide rollers 26, 26 are rotatably supported by the bearing member 25 while being separated in a direction intersecting with the approach / separation direction with respect to the side surface of the mast 16. In the main body portion 32, insertion holes 32a through which the screw members 28 pass are formed at positions corresponding to the respective screw members 28, and the bearing member 25 passes through the insertion holes 32a, 32a. It is configured to be able to move toward and away from the side surface of the mast 16 along the two screw members 28, 28.

図４に示す如く、前記ローラ取着部材２４の側壁３１と、前記収容部２４ａに嵌め込まれた軸受部材２５の本体部３２との間に、複数(実施例では３つ)の付勢手段としての圧縮コイルバネ３４,３５,３５が弾力的に介在している。実施例では、本体部３２の長手方向の中間(一対のガイドローラ２６,２６の中間)に第１圧縮コイルバネ３４が介在すると共に、該第１圧縮コイルバネ３４と各軸部３３との間に(第１圧縮コイルバネ３４を挟む長手方向の両側)に第２圧縮コイルバネ３５が夫々介在している。そして、３つの圧縮コイルバネ３４,３５,３５によって、軸受部材２５は、前記ガイドローラ２６,２６がマスト１６の側面に接近する方向に付勢される。実施例では、第１圧縮コイルバネ３４の付勢力は、第２圧縮コイルバネ３５の付勢力より大きく設定されて、当該軸受部材２５の長手方向の両端部に取り付けた一対のガイドローラ２６,２６が傾くことなく、均等にマスト１６のレール部１６ａ,１６ａに当接するよう構成される。 As shown in FIG. 4, between the side wall 31 of the roller attaching member 24 and the main body 32 of the bearing member 25 fitted in the housing portion 24a, a plurality of (three in the embodiment) urging means is provided. Compression coil springs 34, 35, 35 are elastically interposed. In the embodiment, the first compression coil spring 34 is interposed in the middle of the main body 32 in the longitudinal direction (middle of the pair of guide rollers 26, 26), and between the first compression coil spring 34 and each shaft 33 ( The second compression coil springs 35 are interposed on both sides of the first compression coil spring 34 in the longitudinal direction). The bearing member 25 is urged by the three compression coil springs 34, 35, 35 in a direction in which the guide rollers 26, 26 approach the side surface of the mast 16. In the embodiment, the urging force of the first compression coil spring 34 is set to be larger than the urging force of the second compression coil spring 35, and the pair of guide rollers 26, 26 attached to both longitudinal ends of the bearing member 25 tilt. Therefore, it is configured to evenly contact the rail portions 16a, 16a of the mast 16.

図３、図４に示す如く、前記軸受部材２５の本体部３２に、前記第１圧縮コイルバネ３４の一方の端部が収容される凹部３２ｂが設けられると共に、該凹部３２ｂと対向するローラ取着部材２４における側壁３１の内面に、第１圧縮コイルバネ３４の他方の端部が収容される第１の凹部３１ｂが設けられている。そして、側壁３１と本体部３２との間に介在する第１圧縮コイルバネ３４の各端部を対応する凹部３１ｂ,３２ｂに収容することで、該第１圧縮コイルバネ３４が位置ズレするのを規制している。また、ローラ取着部材２４における側壁３１の内面(具体的には通孔３１ａに対応する位置)に、各第２圧縮コイルバネ３５の端部が収容される第２の凹部３１ｃが設けられており、第２圧縮コイルバネ３５の端部を第２の凹部３１ｃに収容することで、該第２圧縮コイルバネ３５が位置ズレするのを規制している。なお、前記ネジ部材２８は、対応する第２圧縮コイルバネ３５の内側に挿通される。実施例では、軸受部材２５をマスト１６の側面に対して接近・離間自在に支持するローラ取着部材２４において、該軸受部材２５との間に圧縮コイルバネ３４,３５が介在される側壁３１が支持部として機能する。 As shown in FIGS. 3 and 4, a concave portion 32 b for accommodating one end of the first compression coil spring 34 is provided in the main body portion 32 of the bearing member 25, and a roller attachment facing the concave portion 32 b is provided. On the inner surface of the side wall 31 of the member 24, a first recess 31b in which the other end of the first compression coil spring 34 is accommodated is provided. Then, by accommodating the respective ends of the first compression coil spring 34 interposed between the side wall 31 and the main body 32 in the corresponding concave portions 31b and 32b, the first compression coil spring 34 is prevented from being displaced. ing. A second concave portion 31c is provided on the inner surface of the side wall 31 of the roller attachment member 24 (specifically, at a position corresponding to the through hole 31a) to accommodate the end of each second compression coil spring 35. The end of the second compression coil spring 35 is accommodated in the second concave portion 31c, thereby restricting the displacement of the second compression coil spring 35. Note that the screw member 28 is inserted inside the corresponding second compression coil spring 35. In the embodiment, in the roller attachment member 24 that supports the bearing member 25 so as to be able to approach and separate from the side surface of the mast 16, the side wall 31 on which the compression coil springs 34 and 35 are interposed between the roller attachment member 24 and the bearing member 25 is supported. Functions as a unit.

前記ローラ取着部材２４の側壁３１には、図３に示す如く、前記第１圧縮コイルバネ３４の介在位置に対応して内外方向に貫通するネジ孔３１ｄが形成されると共に、該ネジ孔３１ｄに、調整手段としての調整ボルト３６が外側から螺挿される。この調整ボルト３６は、側壁３１の内側に延出する軸端が、前記軸受部材２５の本体部３２に当接可能に構成されると共に、側壁３１の内側(収容部２４ａ内)への延出量を、回転することによって可変し得るようになっている。そして、調整ボルト３６は、側壁３１の内側への延出量を可変することで、軸受部材２５(ガイドローラ２６,２６)がマスト１６の側面に対する離間方向へ移動するのを規制する規制位置を調整し得るよう構成される。すなわち、マスト１６が搬送方向の前後に揺れる際に、ガイドローラ２６,２６を介して軸受部材２５に加わる負荷によって前記圧縮コイルバネ３４,３５,３５の付勢力に抗して軸受部材２５がマスト１６の側面に対する離間方向へ移動した際に、該軸受部材２５が調整ボルト３６に当接して移動規制されることで、マスト１６が大きく揺れるのを防止し得るようになっている。また、調整ボルト３６は六角頭部３６ａを備え、図６に示す如く、コ字状の回転規制部材３７を、六角頭部３６ａが内側に臨む状態でローラ取着部材２４の側壁３１にネジ止め固定することで、当該調整ボルト３６が緩むのを防止するよう構成される。 As shown in FIG. 3, a screw hole 31d penetrating inward and outward is formed in the side wall 31 of the roller attaching member 24 corresponding to the interposition position of the first compression coil spring 34, and the screw hole 31d is formed in the screw hole 31d. The adjusting bolt 36 as an adjusting means is screwed from the outside. The adjusting bolt 36 is configured such that a shaft end extending inside the side wall 31 can be brought into contact with the main body 32 of the bearing member 25, and extends inside the side wall 31 (inside the accommodation portion 24 a). The amount can be varied by rotating. The adjusting bolt 36 changes the amount of extension toward the inside of the side wall 31 so that the regulating position for regulating movement of the bearing member 25 (guide rollers 26, 26) in the direction away from the side surface of the mast 16 is adjusted. It is configured to be adjustable. That is, when the mast 16 swings back and forth in the transport direction, the load applied to the bearing member 25 via the guide rollers 26, 26 causes the bearing member 25 to move against the urging force of the compression coil springs 34, 35, 35. When the bearing member 25 moves in the direction away from the side surface of the mast 16, the bearing member 25 abuts on the adjustment bolt 36 and is restricted from moving, so that the mast 16 can be prevented from largely shaking. The adjusting bolt 36 has a hexagonal head 36a, and as shown in FIG. 6, a U-shaped rotation restricting member 37 is screwed to the side wall 31 of the roller mounting member 24 with the hexagonal head 36a facing inward. By fixing, the adjustment bolt 36 is configured to be prevented from loosening.

前記軸受部材２５の本体部３２は、図５(ｂ),(ｃ)に示す如く、該軸受部材２５のマスト１６の側面に対する接近・離間方向と交差する断面が略正方形(多角形)に形成されると共に、前記軸部３３,３３は、本体部３２における正方形断面(多角形断面)の中央から一つの外表面側に偏倚した位置に設けられている。実施例では、本体部３２における軸部３３,３３が偏倚する側の外表面を第１面３８ａ、該第１面３８ａと交差する２つの外表面を第２面３８ｂ、第１面３８ａと反対側の外表面を第３面３８ｃと指称し、軸部３３の軸心から第１面３８ａまでの長さと、軸部３３の軸心から第２面３８ｂまでの長さと、軸部３３の軸心から第３面３８ｃまでの長さとが異なるよう設定される。すなわち、前記ローラ取着部材２４の収容部２４ａに嵌め込む軸受部材２５の本体部３２の向きを、マストガイド２１を挟んでマスト１６の側面に対し、第１面３８ａを対向する向き、第２面３８ｂを対向する向き、第３面３８ｃを対向する向きとすることで、本体部３２のローラ取着部材２４の側壁３１に対向する面を該側壁３１に当接した状態での、軸部３３の軸心からマスト１６の側面までの長さを３段階で変更し得るよう構成される。言い替えると、本体部３２の向きを変更することで、ガイドローラ２６がマスト１６のレール部１６ａに当接した状態での本体部３２と側壁３１との離間間隔が変化して、前記圧縮コイルバネ３４,３５,３５によってガイドローラ２６がレール部１６ａに当接される付勢力を調整し得るようになっている。 As shown in FIGS. 5B and 5C, the main body 32 of the bearing member 25 has a substantially square (polygonal) cross section that intersects the approach / separation direction of the bearing member 25 with respect to the side surface of the mast 16. At the same time, the shaft portions 33, 33 are provided at positions offset from the center of the square cross section (polygonal cross section) of the main body portion 32 toward one outer surface. In the embodiment, the outer surface of the body portion 32 on the side where the shaft portions 33, 33 are offset is the first surface 38a, and the two outer surfaces intersecting with the first surface 38a are the second surface 38b and the opposite of the first surface 38a. The outer surface on the side is referred to as a third surface 38c, the length from the axis of the shaft 33 to the first surface 38a, the length from the axis of the shaft 33 to the second surface 38b, and the axis of the shaft 33. The length from the center to the third surface 38c is set to be different. That is, the orientation of the main body 32 of the bearing member 25 fitted into the housing portion 24a of the roller attachment member 24 is set such that the first surface 38a faces the side surface of the mast 16 with the mast guide 21 interposed therebetween. By setting the surface 38b to the facing direction and the third surface 38c to the facing direction, the shaft portion in a state where the surface of the main body 32 facing the side wall 31 of the roller attaching member 24 is in contact with the side wall 31 The length from the axis of 33 to the side surface of the mast 16 can be changed in three stages. In other words, by changing the direction of the main body 32, the spacing between the main body 32 and the side wall 31 in a state where the guide roller 26 is in contact with the rail 16a of the mast 16 changes, and the compression coil spring 34 , 35, 35, the biasing force of the guide roller 26 against the rail portion 16a can be adjusted.

図５(ｂ),(ｃ)に示す如く、前記軸受部材２５の本体部３２には、前記ローラ取着部材２４の収容部２４ａに嵌め込む際の向きを変えても、前記ネジ部材２８が貫通可能なように、対向する外表面間(第１面３８ａと第３面３８ｃとの間および第２面３８ｂと第２面３８ｂとの間)の夫々に、前記挿通孔３２ａが形成されている。また、前記第１圧縮コイルバネ３４の端部を収容する凹部３２ｂについても、４つの面３８ａ,３８ｂ,３８ｂ,３８ｃの夫々に形成されている。 As shown in FIGS. 5B and 5C, the screw member 28 can be fitted in the main body 32 of the bearing member 25 even when the orientation of the screw member 28 when it is inserted into the housing portion 24 a of the roller mounting member 24 is changed. The insertion holes 32a are formed between opposing outer surfaces (between the first surface 38a and the third surface 38c and between the second surface 38b and the second surface 38b) so as to be penetrable. I have. The recess 32b for accommodating the end of the first compression coil spring 34 is also formed on each of the four surfaces 38a, 38b, 38b, 38c.

〔実施例の作用〕
次に、前述のように構成された実施例の昇降装置のガイド機構の作用につき説明する。 [Operation of the embodiment]
Next, the operation of the guide mechanism of the lifting device of the embodiment configured as described above will be described.

前記ガイド機構２２における各ローラユニット２３では、図３に示す如く、前記マストガイド２１に固定したローラ取着部材２４の収容部２４ａに嵌め込まれている前記軸受部材２５は、３本の圧縮コイルバネ３４,３５,３５の付勢力によって、マストガイド２１の側面に接近する方向に付勢されている。すなわち、軸受部材２５に支持したガイドローラ２６,２６は、圧縮コイルバネ３４,３５,３５の付勢力によってマスト１６のレール部１６ａ,１６ａに接近する方向に付勢されている。従って、レール部１６ａとガイドローラ２６との接触部分が経時的に摩耗しても、ガイドローラ２６が自動的にレール部１６ａに接近して当接状態を保ち、昇降するマスト１６を安定的に案内することができる。また、前記台車１１の加減速時にマスト１６に作用する慣性力によって該マスト１６が搬送方向の前後に揺れようとする際にガイドローラ２６,２６が加わる負荷は、該ガイドローラ２６,２６を付勢している圧縮コイルバネ３４,３５,３５によって緩衝されるので、ガイドローラ２６,２６の軸受や、ローラ取着部材２４をマストガイド２１に固定する固定手段２７等に過大な負荷が加わるのを抑制することができ、故障の発生を好適に防止し得る。 In each roller unit 23 of the guide mechanism 22, as shown in FIG. 3, the bearing member 25 fitted in the accommodating portion 24 a of the roller attachment member 24 fixed to the mast guide 21 includes three compression coil springs 34. , 35, 35 urged in a direction approaching the side surface of the mast guide 21. That is, the guide rollers 26, 26 supported by the bearing member 25 are urged in a direction approaching the rail portions 16a, 16a of the mast 16 by the urging forces of the compression coil springs 34, 35, 35. Therefore, even if the contact portion between the rail portion 16a and the guide roller 26 wears over time, the guide roller 26 automatically approaches the rail portion 16a to maintain the contact state, and the mast 16 ascending and descending can be stably held. I can guide you. The load applied to the guide rollers 26, 26 when the mast 16 tries to swing back and forth in the transport direction due to the inertial force acting on the mast 16 during acceleration and deceleration of the carriage 11 is applied to the guide rollers 26, 26. Since the compression coil springs 34, 35, 35 are buffered, excessive load is applied to the bearings of the guide rollers 26, 26, the fixing means 27 for fixing the roller attaching member 24 to the mast guide 21, and the like. It is possible to suppress the occurrence of a failure.

実施例のガイド機構２２は、ガイドローラ２６,２６とレール部１６ａ,１６ａとの摩耗量に応じてガイドローラ２６,２６を、圧縮コイルバネ３４,３５,３５によって自動的にレール部１６ａ,１６ａに当接する状態を維持するよう構成したので、従来のようにシムを交換する場合等に比べて調整時間を省略することができる。また、ガイドローラ２６,２６の位置が自動調整されるので、レール部１６ａとガイドローラ２６との隙間が、不具合が発生する程度に大きくなっていることを見落として問題が重大化するのを防ぐことができる。 The guide mechanism 22 of the embodiment automatically applies the guide rollers 26, 26 to the rails 16a, 16a by the compression coil springs 34, 35, 35 in accordance with the amount of wear between the guide rollers 26, 26 and the rails 16a, 16a. Since the contact state is maintained, the adjustment time can be reduced as compared with the conventional case where the shim is replaced. Further, since the positions of the guide rollers 26, 26 are automatically adjusted, it is possible to prevent the problem from becoming serious by overlooking that the gap between the rail portion 16a and the guide roller 26 is large enough to cause a problem. be able to.

前記軸受部材２５の長手方向の中間(一対のガイドローラ２６,２６の中間)に位置する前記第１圧縮コイルバネ３４の付勢力を、該第１圧縮コイルバネ３４を挟む両側に位置する前記第２圧縮コイルバネ３５,３５の付勢力より大きく設定しているので、軸受部材２５が長手方向に傾くことなくマストガイド２１に対して接近するように付勢し得る。すなわち、軸受部材２５の長手方向の両端に支持した一対のガイドローラ２６,２６を、マスト１６の一対のレール部１６ａ,１６ａに均等に当接し得るので、一方のガイドローラ２６やレール部１６ａのみが摩耗するのを抑制することができ、長期に亘って安定した案内を達成し得る。 The biasing force of the first compression coil spring 34 located in the middle of the bearing member 25 in the longitudinal direction (middle of the pair of guide rollers 26, 26) is applied to the second compression coil located on both sides of the first compression coil spring 34. Since the biasing force is set to be larger than the biasing forces of the coil springs 35, 35, the bearing member 25 can be biased to approach the mast guide 21 without inclining in the longitudinal direction. That is, the pair of guide rollers 26, 26 supported at both ends in the longitudinal direction of the bearing member 25 can evenly contact the pair of rail portions 16a, 16a of the mast 16, so that only one of the guide roller 26 and the rail portion 16a is provided. Can be suppressed, and stable guidance can be achieved over a long period of time.

実施例のガイド機構２２は、前記ローラ取着部材２４に配設した調整ボルト３６によって、前記軸受部材２５が圧縮コイルバネ３４,３５,３５の付勢力に抗してマスト１６の側面に対する離間方向に移動するのを規制する規制位置を調整し得るようにした。すなわち、前記台車１１の加減速時にマスト１６が搬送方向の前後に揺れる際に、ガイドローラ２６,２６を介して加わる負荷によって軸受部材２５が圧縮コイルバネ３４,３５,３５の付勢力に抗してマスト１６の側面に対する離間方向に移動した際に、該軸受部材２５が調整ボルト３６の軸端に当接して位置規制されることで、マスト１６が大きく揺れるのを防止することができる。また、マストガイド２１に固定したローラ取着部材２４に調整ボルト３６を設けているので、マスト１６が揺れることで押された軸受部材２５に加わる力をマストガイド２１で受けることができ、ガイドローラ２６,２６の軸受等に過大な負荷が加わるのを抑制し得る。また、調整ボルト３６を回転して前記側壁３１の内側への延出量を可変すれば、軸受部材２５の規制位置を調整し得るので、軸受部材２５が調整ボルト３６の軸端に当接した状態での圧縮コイルバネ３４,３５,３５の縮み量、すなわち当該状態で圧縮コイルバネ３４,３５,３５によるガイドローラ２６,２６への付勢力を調整することができる。 In the guide mechanism 22 of the embodiment, the adjusting member 36 disposed on the roller attaching member 24 allows the bearing member 25 to move away from the side surface of the mast 16 against the urging force of the compression coil springs 34, 35, 35. The restriction position for restricting the movement can be adjusted. That is, when the mast 16 swings back and forth in the transport direction during acceleration and deceleration of the carriage 11, the load applied via the guide rollers 26, 26 causes the bearing member 25 to resist the urging force of the compression coil springs 34, 35, 35. When the bearing member 25 moves in the direction away from the side surface of the mast 16, the bearing member 25 abuts on the shaft end of the adjustment bolt 36 to regulate the position, so that the mast 16 can be prevented from largely shaking. Further, since the adjusting bolt 36 is provided on the roller attaching member 24 fixed to the mast guide 21, the mast guide 21 can receive the force applied to the bearing member 25 pressed by the mast 16 swinging. It is possible to suppress an excessive load from being applied to the bearings 26, 26 and the like. Further, if the adjustment bolt 36 is rotated to change the amount of extension to the inside of the side wall 31, the regulation position of the bearing member 25 can be adjusted, so that the bearing member 25 has come into contact with the shaft end of the adjustment bolt 36. The compression amount of the compression coil springs 34, 35, 35 in the state, that is, the urging force of the compression coil springs 34, 35, 35 on the guide rollers 26, 26 can be adjusted in this state.

ここで、実施例のガイド機構２２では、前記軸受部材２５の本体部３２に対して軸部３３,３３を、一つの外表面側に偏倚して設けているので、図７に示す如く、前記ローラ取着部材２４に対して軸受部材２５を、本体部３２におけるマスト側を向く面を基準線Ｌに揃えた場合に、第１面３８ａ、第２面３８ｂおよび第３面３８ｃをマスト側を向くように本体部３２の向きを変更することで、ガイドローラ２６がローラ取着部材２４からマスト側に突出する量が変化する。そして、ガイドローラ２６の突出量は、第３面３８ｃをマスト側に向けた状態が最も小さく、次いで第２面３８ｂを向けた状態、第１面３８ａを向けた状態で順に大きくなる。 Here, in the guide mechanism 22 of the embodiment, since the shaft portions 33, 33 are provided so as to be offset toward one outer surface side with respect to the main body portion 32 of the bearing member 25, as shown in FIG. When the surface facing the mast side of the main body portion 32 is aligned with the reference line L with respect to the roller attachment member 24, the first surface 38a, the second surface 38b, and the third surface 38c are connected to the mast side. By changing the direction of the main body 32 so as to face, the amount by which the guide roller 26 projects from the roller mounting member 24 toward the mast changes. The protrusion amount of the guide roller 26 is smallest when the third surface 38c is directed to the mast side, and then increases sequentially when the second surface 38b is directed and the first surface 38a is directed.

そこで、前記ガイドローラ２６およびレール部１６ａに摩耗がない状態で、図７(ａ)に示す如く、前記本体部３２の第３面３８ｃをマスト側に向けた軸受部材２５をローラ取着部材２４に取り付けて、マスト１６を案内する。経時的にレール部１６ａおよびガイドローラ２６が摩耗すると、その摩耗分だけガイドローラ２６および軸受部材２５が圧縮コイルバネ３４,３５,３５に付勢されてマスト１６の側面に近接する方向に移動する。レール部１６ａおよびガイドローラ２６の摩耗量が大きくなるのに伴い、ローラ取着部材２４の側壁３１に対して軸受部材２５の本体部３２が離間する移動量が大きくなると、圧縮コイルバネ３４,３５,３５の伸び量も大きくなってガイドローラ２６をレール部１６ａに当接する付勢力が変化する。そして、圧縮コイルバネ３４,３５,３５による付勢力が弱くなり過ぎると、ガイドローラ２６(ガイド機構２２)によるマスト１６の案内性能が低下するおそれが生ずる。 Therefore, in a state where the guide roller 26 and the rail portion 16a are not worn, as shown in FIG. 7A, the bearing member 25 with the third surface 38c of the main body 32 facing the mast side is attached to the roller attaching member 24. To guide the mast 16. When the rail portion 16a and the guide roller 26 wear over time, the guide roller 26 and the bearing member 25 are urged by the compression coil springs 34, 35, and 35 to move toward the side surface of the mast 16 by the wear. As the amount of wear of the rail 16a and the guide roller 26 increases, the amount of movement of the main body 32 of the bearing member 25 away from the side wall 31 of the roller attachment member 24 increases, so that the compression coil springs 34, 35, The amount of extension of 35 also increases, and the urging force for bringing the guide roller 26 into contact with the rail portion 16a changes. If the urging force of the compression coil springs 34, 35, 35 becomes too weak, the guide performance of the mast 16 by the guide roller 26 (guide mechanism 22) may be reduced.

前記ガイドローラ２６(ガイド機構２２)によるマスト１６の案内性能が低下した場合は、前記軸受部材２５の本体部３２の向きを変えて前記第２面３８ｂをマスト側に向けることで(図７(ｂ)参照)、前記ローラ取着部材２４に対するガイドローラ２６の突出量が大きくなる。従って、摩耗したレール部１６ａおよびガイドローラ２６が当接した状態において、ローラ取着部材２４の側壁３１と軸受部材２５の本体部３２との離間間隔は小さくなり、圧縮コイルバネ３４,３５,３５による付勢力を適正な値に戻すことができる。そして、レール部１６ａおよびガイドローラ２６の摩耗量が更に大きくなった場合は、本体部３２の向きを変えて前記第１面３８ａをマスト側に向けることで(図７(ｃ)参照)、圧縮コイルバネ３４,３５,３５による付勢力を適正な値に戻すことができる。 When the guide performance of the mast 16 by the guide roller 26 (guide mechanism 22) is reduced, the direction of the main body 32 of the bearing member 25 is changed so that the second surface 38b faces the mast side (see FIG. b)), the amount of protrusion of the guide roller 26 with respect to the roller attachment member 24 increases. Accordingly, in a state where the worn rail portion 16a and the guide roller 26 are in contact with each other, the separation distance between the side wall 31 of the roller attaching member 24 and the main body portion 32 of the bearing member 25 becomes small, and the compression coil springs 34, 35, 35 The biasing force can be returned to an appropriate value. If the amount of wear of the rail 16a and the guide roller 26 further increases, the direction of the main body 32 is changed so that the first surface 38a faces the mast side (see FIG. 7 (c)). The biasing force of the coil springs 34, 35, 35 can be returned to an appropriate value.

すなわち、実施例のガイド機構２２では、レール部１６ａおよびガイドローラ２６の摩耗量が大きくなるのに伴い圧縮コイルバネ３４,３５,３５による適正な付勢力が得られなくなった場合に、ガイドローラ２６や圧縮コイルバネ３４,３５,３５を交換することなく、軸受部材２５の本体部３２の向きを変更するだけで、圧縮コイルバネ３４,３５,３５による付勢力を適正な値に戻すことができる。 That is, in the guide mechanism 22 of the embodiment, when the appropriate urging force by the compression coil springs 34, 35, 35 cannot be obtained due to the increase in the wear amount of the rail portion 16a and the guide roller 26, the guide roller 26 The urging force of the compression coil springs 34, 35, 35 can be returned to an appropriate value only by changing the direction of the main body 32 of the bearing member 25 without replacing the compression coil springs 34, 35, 35.

〔変更例〕
本願は、前述した実施例の構成に限定されるものでなく、その他の構成を適宜に採用することができる。
１．実施例では、マストの４つの側面の夫々に対してローラユニットを配置したが、マストには、被搬送物の搬送方向の前後に慣性力が作用するので、マストの４つの側面の内の搬送方向の前後に対向する２つの側面に対応して、本願発明に係るローラユニットを配設する構成を採用することができる。なお、マストにおける搬送方向と交差する方向で対向する側面については、ローラユニットを配置しないか、または隙間調整をシムにより行う従来構成のローラユニットを用いることができる。
２．実施例では、台車が直線的に往復移動するマスト式クレーンの昇降装置の場合で説明したが、平面におけるＸ軸方向およびＹ軸方向に移動する構成のマスト式クレーンの昇降装置に、本願発明のガイド機構を採用することができる。また、水平に揺動または旋回する本体に対してマストを昇降自在に支持するガイド機構として、本願発明のガイド機構を採用することができる。
３．台車に対して昇降自在に支持されるマスト(支柱)の数は、実施例の２本に限られるものではなく、１本または３本以上であってもよい。また、１本のマスト(支柱)をガイド機構で支持する構成では、特許文献１のようにマスト(支柱)が旋回するものであってもよい。
４．実施例では、被搬送物(物品)を支持する支持手段としてクローを挙げたが、該支持手段は、被搬送物(物品)を把持および解放可能な把持手段等、被搬送物(物品)を支持可能な各種の手段を用いることができる。 [Modification example]
The present application is not limited to the configuration of the above-described embodiment, and other configurations can be appropriately adopted.
1. In the embodiment, the roller unit is disposed on each of the four side surfaces of the mast. However, since inertial force acts on the mast before and after in the transport direction of the object to be transported, the transport within the four side surfaces of the mast is performed. It is possible to adopt a configuration in which the roller unit according to the present invention is disposed corresponding to two side surfaces facing each other in the front and rear directions. In addition, on the side surface of the mast that faces in the direction intersecting the transport direction, a roller unit having no conventional roller unit or a roller unit having a conventional configuration that performs gap adjustment using a shim can be used.
2. In the embodiment, the description has been given of the case of the lifting device of the mast crane in which the bogie moves linearly back and forth. A guide mechanism can be employed. Further, the guide mechanism according to the present invention can be employed as a guide mechanism for supporting the mast vertically with respect to the horizontally swinging or rotating main body.
3. The number of masts (posts) supported to be able to move up and down with respect to the carriage is not limited to two in the embodiment, and may be one or three or more. Further, in a configuration in which one mast (post) is supported by a guide mechanism, the mast (post) may turn as in Patent Literature 1.
4. In the embodiment, the claw has been described as a supporting means for supporting the transported object (article) .However, the supporting means holds the transported object (article) such as a gripper capable of gripping and releasing the transported object (article). Various supportable means can be used.

５．実施例では、付勢手段として複数の圧縮コイルバネを採用したが、１本、２本あるいは４本以上の圧縮コイルバネを用いることができる。
６．付勢手段は、圧縮コイルバネに限らず、皿バネ等のその他のバネあるいはゴム等の弾性部材を採用することができる。
７．実施例では、軸受部材の本体部を断面正方形状としたが、六角形や八角形等の多角形状を採用することができる。
８．実施例では、マスト(支柱)の各側面に２つのガイドローラを当接して案内するよう構成したが、１つのガイドローラで１つの側面を当接案内する構成を採用できる。例えば、マストの側面に対して接近・離間自在に支持された軸受部材の軸方向の中間に１つのガイドローラを回転自在に支持し、軸受部材におけるガイドローラから軸方向の両側に突出する部分の夫々を、圧縮コイルバネ(付勢手段)によってマストの側面に接近する方向に付勢するようにすればよい。 5. In the embodiment, a plurality of compression coil springs are employed as the urging means, but one, two, or four or more compression coil springs can be used.
6. The urging means is not limited to a compression coil spring, but may be another spring such as a disc spring or an elastic member such as rubber.
7. In the embodiment, the main body of the bearing member has a square cross section. However, a polygonal shape such as a hexagon or an octagon can be adopted.
8. In the embodiment, two guide rollers are configured to contact and guide each side surface of the mast (post), but a configuration in which one guide roller abuts one side surface may be adopted. For example, one guide roller is rotatably supported at an axial center of a bearing member supported so as to be able to approach / separate from the side surface of the mast, and a portion of the bearing member protruding from the guide roller to both sides in the axial direction. Each of them may be urged by a compression coil spring (urging means) in a direction approaching the side surface of the mast.

１２被搬送物(物品)，１３昇降装置，１６マスト(支柱)，１８クロー(支持手段)
２２ガイド機構、２３ローラユニット，２５軸受部材，２６ガイドローラ
３１側壁(支持部)，３２本体部，３３軸部，３４第１圧縮コイルバネ(付勢手段)
３５第２圧縮コイルバネ(付勢手段)，３６調整ボルト(調整手段) 12 conveyed object (article), 13 lifting device, 16 mast (post), 18 claw (support means)
Reference Signs List 22 guide mechanism, 23 roller unit, 25 bearing member, 26 guide roller 31 side wall (support portion), 32 main body portion, 33 shaft portion, 34 first compression coil spring (biasing means)
35 second compression coil spring (biasing means), 36 adjusting bolt (adjusting means)

Claims

A guide mechanism of an elevating device for vertically elevating a column having a support means for supporting an article,
A roller unit disposed opposite to each of at least two side surfaces of the support that are opposed to each other in a direction intersecting the vertical direction,
The roller unit includes:
A guide roller that is freely movable toward and away from the side surface of the column, and is rotatably supported,
Biasing means for biasing the guide roller toward the side surface of the support,
The guide mechanism of an elevating device, wherein the guide roller is configured to abut against a side surface of the column by the urging force of the urging means and to rotate and guide the column as the column is raised and lowered.

The roller unit includes:
A support portion separated from the side surface of the support,
A bearing member positioned between the support portion and the side surface of the column, and capable of approaching and separating from the side surface of the column,
The guide roller is rotatably supported on each of a pair of shaft portions provided in the bearing member and separated in a direction intersecting the approaching / separating direction with respect to the side surface of the support,
The urging means is elastically interposed between the support portion and the bearing member,
2. The guide mechanism according to claim 1, further comprising an adjusting unit configured to adjust a position for restricting the bearing member from moving in a direction away from the side surface of the column against the urging force of the urging unit. .

The urging means includes a first urging means positioned between the pair of shafts in the bearing member, and a second urging means positioned between the first urging means and each shaft. ,
3. The guide mechanism of the lifting device according to claim 2, wherein the urging force of the first urging unit is set to be larger than the urging force of the second urging unit.

The bearing member includes a main body having a polygonal cross section orthogonal to the approach / separation direction with respect to the side surface of the support, and the shaft portion is offset from the center of the polygonal cross section with respect to the main body. Provided,
By changing the direction of the main body portion so as to change the surface of the main body portion facing the side surface of the support, the guide roller can adjust the biasing force of abutting the side surface of the support by the biasing means. A guide mechanism for a lifting device according to claim 2.