WO2012144281A1 - 噛合チェーンユニット - Google Patents
噛合チェーンユニット Download PDFInfo
- Publication number
- WO2012144281A1 WO2012144281A1 PCT/JP2012/056703 JP2012056703W WO2012144281A1 WO 2012144281 A1 WO2012144281 A1 WO 2012144281A1 JP 2012056703 W JP2012056703 W JP 2012056703W WO 2012144281 A1 WO2012144281 A1 WO 2012144281A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chain
- meshing
- pair
- plate
- chains
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G13/00—Chains
- F16G13/02—Driving-chains
- F16G13/04—Toothed chains
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G13/00—Chains
- F16G13/18—Chains having special overall characteristics
- F16G13/20—Chains having special overall characteristics stiff; Push-pull chains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/02—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with racks actuated by pinions
- B66F3/06—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with racks actuated by pinions with racks comprising pivotable toothed sections or segments, e.g. arranged in pairs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
- F16H19/06—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member
- F16H19/0636—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising flexible members, e.g. an endless flexible member the flexible member being a non-buckling chain
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/30—Chain-wheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18088—Rack and pinion type
- Y10T74/18096—Shifting rack
Definitions
- the present invention relates to a meshing chain unit that moves a driven body forward and backward for use in manufacturing equipment in various manufacturing fields, transport equipment in the transport field, care equipment in the medical and welfare field, stage equipment in the art field, and the like.
- a driving device there is a driving device that moves a driven object such as a heavy object using a pair of meshing chains that are meshed with each other and driven integrally (a so-called chuck chain (see, for example, Patent Document 1). ).
- a silent chain transmission that reduces the noise and vibration when driving a chain by defining the shape of the inner surface of the link plate, that is, the surface that meshes with the sprocket teeth (see, for example, Patent Document 2).
- Japanese Patent Laying-Open No. 2009-113872 See Claims, FIG. 5
- Japanese Utility Model Publication No. 6-13399 (refer to claims, FIG. 1)
- the above-described meshing chain does not specifically mention design matters such as a meshing end surface that meshes the internal tooth plates and external tooth plates with each other and a buckling regulation end surface that regulates buckling. There has been a problem that it is difficult to firmly and reliably mesh the plates and the external tooth plates. Further, in the above-described meshing chain, when the inner tooth plates and the outer tooth plates are meshed with each other, a non-uniform compressive force is applied to these plates. There is a problem that it is difficult to avoid buckling occurring in the chain stiffening portion of the chain and twisting of the chain stiffening portion.
- the object of the present invention is to securely and firmly mesh the inner tooth plates and the outer tooth plates and to mesh with each other and integrate them. It is an object of the present invention to provide a meshing chain unit that improves rigidity and avoids buckling or twisting of a chain-stiffened portion.
- an internal tooth plate and an external tooth plate that is disposed adjacent to the outside of the internal tooth plate and has a partial overlap region are connected to each other by a pair of front and rear connecting pins.
- a meshing chain unit comprising a pair of meshing chains that are coupled together in the direction and meshed with each other in a state of being configured to be rigidized integrally in the advancing and retreating direction and to be separated from each other and branched.
- the buckling regulation of each of the two external tooth plates is formed so as to constitute a plate overlapping region.
- the surfaces are configured to contact each other along an oblique direction with respect to the stiffening chain advancing and retreating direction, and the plate overlapping region is a contact in which each of the hook-shaped engagement end surfaces of the two internal tooth plates is in contact with each other It is composed of two plate overlapping contours whose outer edges are defined by flat buckling regulating end surfaces of the two external tooth plates that are in contact with the partial surfaces, and an outline of the contours of the two plate overlapping portions.
- the shape is point-symmetric with respect to the intersection of the hook-shaped engagement end face and the buckling restriction end face, and any or all of the inner tooth plate, the outer tooth plate, and the connecting pin are connected to the plate overlapping region.
- the invention according to claim 2 is the chain operation restriction in the meshing chain unit according to claim 1, wherein the pair of meshing chains regulates the operation of the pair of meshing chains along the stiffening chain advancing / retreating direction.
- the chain operation regulating means is subjected to a chain advance / retreat operation based on the meshing operation and the meshing operation of the pair of meshing chains.
- the above-described problem is further solved by the drive sprocket provided in the meshing chain type advance / retreat operation device for moving the drive body forward and backward.
- the meshing chain unit according to claim 1 of the present invention includes an inner tooth plate and an outer tooth plate that is arranged adjacent to the outer side of the inner tooth plate and has a partial overlapping region by a pair of front and rear connecting pins.
- a pair of meshing chains that are connected to each other in the longitudinal direction of the chain and meshed with each other in a state of being configured to be rigid together and branch off after being meshed with each other. In addition to being able to switch between the chain rigid state and the chain branching state, it is possible to achieve special effects corresponding to the following unique configurations. *
- the hook-shaped meshing end surfaces of the two internal teeth plates that mesh with each other are the plates of the internal tooth plate and the external tooth plate, respectively.
- the plate overlapping region is formed so that each of the hook-shaped meshing end surfaces of the two internal tooth plates is mutually connected. It is composed of the contours of the two overlapping portions defined by the outer edges of the contacted contact portion surfaces and the flat buckling restriction end surfaces of the two external tooth plates that are in contact with each other.
- the outline of the contour is point-symmetric with respect to the intersection of the hook-shaped engagement end surface and the buckling restriction end surface.
- a pair of meshes by avoiding a shift in the chain disengagement direction between the hook-shaped meshing end surfaces meshed with each other while eliminating the non-uniformity of the compressive force acting on the buckling regulating end surfaces on both sides of the center
- the internal tooth plate Engage each other firmly and reliably, and realize strong and reliable meshing between the outer tooth plates due to the meshing of the inner tooth plates, and improve the rigidity of the pair of meshing chains meshed with each other and integrated Buckling and twisting of the chain stiffening part can be avoided.
- the buckling regulating end surfaces of the two external tooth plates contact each other along the oblique direction with respect to the stiffening chain advancing / retreating direction, and thereby acting on the buckling regulating end surfaces along the stiffening chain advancing / retreating direction.
- the hook-shaped engagement end surfaces regulate the disengagement of the pair of engagement chains.
- the plates can be firmly and reliably engaged with each other, and the rigidity of the pair of meshing chains integrated by meshing with each other can be improved to reliably avoid buckling and twisting of the chain-stiffened portion.
- any or all of the internal tooth plate, the external tooth plate, and the connecting pin are elastically deformed so as to stiffen the pair of meshing chains and eliminate play between the parts when forming the plate overlapping region. Therefore, in order to further reduce rattling in a state where the pair of meshing chains are stiffened along with this elastic deformation and there is no play between the parts, the inner tooth plates and the outer tooth plates are firmly and securely engaged with each other.
- the rigidity of the pair of meshing chains that are integrated and meshed with each other can be improved to further avoid buckling or twisting of the chain-stiffened portion.
- the pair of meshing chains regulates the operation of the pair of meshing chains along the advancing / retreating direction of the rigidized chain. Since the pair of meshing chains are meshed with each other in a state where the outer tooth plate and the inner tooth plate are guided in the stiffening chain advancing / retreating direction, the pair of meshing chains are reliably engaged. The meshing can be realized.
- the chain operation restricting means has a chain advance / retreat operation based on the meshing operation and the disengagement operation of the pair of meshing chains.
- the drive sprocket provided in the meshing chain type advance / retreat operation device that moves the driven body in accordance with the movement of the driven body makes it possible to drive the driven body forward and backward with the chain stiffening part with improved rigidity. It is possible to avoid the buckling and twisting of the straightened portion and accurately move the driven body forward and backward to a predetermined position.
- FIG. 5 is a partially enlarged view of the vicinity of the drive sprocket shown in FIG. 4. The figure which showed the contact state of the chain guide plate and the meshing chain.
- the meshing chain unit includes an inner tooth plate and an outer tooth plate that is arranged adjacent to the outside of the inner tooth plate and has a partial overlapping region in the longitudinal direction of the chain by a pair of front and rear connecting pins.
- they When connected to each other, they are engaged with each other to be rigidized integrally in the advance and retreat direction, and are provided with a pair of meshing chains that are disengaged from each other and branch, and when a pair of meshing chains are meshed with each other
- a plate overlapping region is formed.
- the buckling restriction end surfaces of the two external tooth plates are formed obliquely with respect to the advancing / retreating direction of the rigidized chain.
- Each of the two external tooth plates that are in contact with each other with the contact portion surfaces that contact each of the hook-like meshing end surfaces of the two internal tooth plates.
- the contour of the two overlapping plate portions, the outer edges of which are defined by the flat buckling regulating end surface of the plate, is formed with respect to the intersection of the hook-shaped engagement end surface and the buckling regulating end surface.
- the meshing chain unit includes a link unit configured in the longitudinal direction of the chain, which includes a pair of internal teeth plates facing in the chain width direction and a pair of external teeth plates arranged on the outer sides of the internal tooth plates. It may be composed of a plurality of rows of chain units each connected in a large number, or may be composed of a single row of chain units.
- the effect exerted by the buckling regulation end surface of the external tooth plate and the hook-shaped engagement end surface of the internal tooth plate is the case where the relation between the external tooth plate and the internal tooth plate is interchanged, that is, the internal tooth plate
- the same effect can be obtained by the mutual relationship between the buckling restriction end face and the hook-like engagement end face of the external tooth plate. Further, even if a concave notch is provided in a part of the hook-shaped engagement end surface or the buckling restriction end surface of one of the engagement chains of the pair of engagement chains, the same effect as described above can be obtained.
- interlocking chain type advance / retreat operation device provided with the interlocking chain unit of the present invention can be used for advancing / retreating operation regardless of whether the installation surface is a floor surface in a stationary installation form or a ceiling surface in a suspended installation form. There is no hindrance, and there is no hindrance to the advancing and retreating operation described above even if the wall surface is a cantilevered support.
- FIG. 1 is a perspective view showing a disassembled and assembled state of the meshing chain unit according to the embodiment of the present invention
- FIG. 2 is a front view of a meshing portion where a pair of meshing chains mesh with each other.
- the meshing chain unit 100 is a so-called chuck chain, and is arranged adjacent to the inner tooth plate 111 and the outer side of the inner tooth plate 111.
- the tooth plate 111 and the external tooth plate 112 having a partially overlapping region are coupled in the longitudinal direction of the chain by a pair of front and rear coupling pins 113, 113, and are engaged with each other in a state where they are configured to be rigidly advancing and retracting the chain A And a pair of meshing chains 110 and 110 that branch out of mesh with each other.
- the bush 114 in which the connecting pin 113 is loosely fitted in the state of being fitted to the internal tooth plate 111 is disposed between the pair of internal tooth plates 111, 111 opposed along the chain width direction W. 115 is externally fitted.
- the meshing chain unit 100 when the pair of meshing chains 110 and 110 are meshed with each other, the hook-shaped meshing end surfaces 111a and 111a of the two internal toothed plates 111 and 111 mesh with each other.
- the pair of meshing chains 110 and 110 are viewed from the plate normal direction orthogonal to the plate main surfaces 111P and 112P of the 112, that is, the chain width direction W, the plate overlap region P is formed.
- the region P corresponds to each of the two external tooth plates 112 and 112 that are in contact with the contact partial surfaces 111aa and 111aa that are in contact with each of the hook-shaped engagement end surfaces 111a and 111a of the two internal tooth plates 111 and 111, respectively.
- the outer edge is defined by the flat buckling regulation end faces 112b and 112b.
- the outline of the two plate overlapping portions Pa, Pa is formed at the intersection C of the hook-shaped engagement end surfaces 111a, 111a and the buckling restriction end surfaces 112b, 112b.
- the hook-shaped engagement end surfaces 111a meshing with each other in a state where the non-uniformity of the compressive force acting on the buckling regulating end surfaces 112b on both sides of the center of the engagement chain unit 100 is eliminated.
- 111a to prevent the pair of interlocking chains 110 and 110 from being disengaged by avoiding the shift in the chain disengagement direction B, and the buckling restricting end surfaces 112b and 112b that are in contact with each other.
- the compression forces acting on each other are balanced in the same plane, that is, in the plane including the external tooth plate 112.
- the internal tooth plates 111 and 111 are firmly and reliably engaged with each other, and the external tooth plates 112 and 112 are engaged with each other while being engaged with each other while being engaged with each other.
- the rigidity of the integrated pair of meshing chains 110, 110 is improved to avoid buckling or twisting of the chain stiffening portion 100A.
- the entire outline of the contours of the two plate overlapping portions Pa and Pa is not limited to the case where they are point-symmetric with respect to the intersection C of the hook-shaped engagement end surfaces 111a and 111a and the buckling regulation end surfaces 112b and 112b. If at least a part of the outline shape of the two plate overlapping portions Pa and Pa is point-symmetric with respect to the intersection C, the effects of avoiding the above-described buckling and twisting can be obtained accordingly.
- the meshing chain unit 100 is rigidized by the buckling restricting end surfaces 112b, 112b of the two external tooth plates 112, 112 contacting each other along the oblique direction T with respect to the rigid chain advance / retreat direction A.
- the hook-like engaging end faces 111a and 111a are engaged with the pair of engaging chains 110 and 110.
- the inner tooth plates 111 and 111 and the outer tooth plates 112 and 112 are firmly and reliably meshed with each other and integrated with each other while avoiding the stress load on the buckling regulation end surfaces 112b and 112b.
- the chain rigidity portion 100 is improved. Buckling and twisting of the adapted to reliably avoided.
- the meshing chain unit 100 is configured such that any one or all of the internal tooth plate 111, the external tooth plate 112, and the connecting pin 113 form a pair of meshing chains when the plate overlap region P is formed, thereby freeing play between components.
- the internal tooth plate 111 is reduced.
- 111 and the external tooth plates 112, 112 are firmly and reliably engaged with each other, and the rigidity of the pair of meshing chains 110, 110 integrated with each other is improved, thereby buckling or twisting the chain stiffening portion 100 ⁇ / b> A. Is to be avoided even more.
- the meshing chain unit 100 includes a pair of meshing chains 110 and 110 that are engaged with each other by chain operation regulating means M and M that regulate the operation of the pair of meshing chains 110 and 110 along the stiffening chain advance / retreat direction A.
- chain operation regulating means M and M that regulate the operation of the pair of meshing chains 110 and 110 along the stiffening chain advance / retreat direction A.
- the chain operation restricting means M, M may be any as long as it can push the meshing chain unit 100 from both sides and guide it in the rigid chain advance / retreat direction A in the region between the chain operation restricting means M, M. Good.
- FIG. 3 is a perspective view of the meshing chain type advance / retreat operation device 200 provided with the meshing chain unit of the present invention
- FIG. 4 is a perspective view of the state in which the lifting table and the panter arm are removed from FIG. 5 is a partially enlarged view of the vicinity of the drive sprocket shown in FIG. 4, and
- FIG. 6 is a view showing a contact state between the chain guide plate and the meshing chain.
- the meshing chain type advance / retreat operation device 200 including the above-described meshing chain unit 100 lifts and lowers a lifting table 210 carrying a heavy object (not shown) parallel to the installation floor G. It is something to be made. *
- the meshing chain type advance / retreat operation device 200 is installed in parallel with the base plate 220 installed on the installation floor G on which the above-described lifting table 210 moves up and down in parallel.
- a pair of drive sprockets 240 that face each other in the same plane around the pair of rotating shafts 230 and rotate in the opposite direction in the opposite direction, and the lifting table by being disengaged from the pair of drive sprockets 240, 240.
- a pair of meshing chain units 100, 100 composed of a pair of meshing chains 110, 110 that move up and down 210, the above-described lifting table 210 that is installed at the upper end of these meshing chain units 100, 100 and moves up and down integrally, and a pair of drives Power is transmitted to the transmission gear group 253 that rotates the sprockets 240, 240 A power transmission chain 252 that drives the power transmission chain 252, and a chain guide plate 260 that is provided in the crotch region of the pair of drive sprockets 240 to guide and move the meshing chain unit 100. It is provided as a device configuration. *
- the chain storage means 270 is spaced apart from the area around the lowest position of the lifting table 210, that is, outside the area under the projection umbrella of the lifting table 210. That is, one of the pair of meshing chains 110 and 110 that are separated from each other and branched is housed in a chain housing means 270 including a take-up type chain housing box 271 disposed on the drive motor 250 side. The other of the meshing chains 110 and 110 is stored in a chain storage means 270 including a linear storage rail 272 disposed on the opposite side facing the drive motor 250.
- the meshing chain type advance / retreat operation device 200 has an upper and lower two-stage connection configuration including an inner arm 281 and an outer arm 282 called an X-shaped panter arm between the lifting table 210 and the base plate 220 on the installation floor G side.
- the lift table 210 is configured to guide a stable lift operation.
- the slide rail 283 slides the lower end of the inner arm 281 in accordance with the raising / lowering operation.
- FIGS. 3 and 6 show the raising / lowering operation
- the pair of meshing chains 110 and 110 are linearly connected to the chain storage box 271 by the pair of driving sprockets 240 and 240 engaged with the roller 115.
- the pair of meshing chains 110 and 110 are respectively fed out from the chain storage means 270 including the shape storage rails 272, and the pair of meshing chains 110 and 110 support the total weight of the lift table 210 on which the lifted object (not shown) made of heavy objects is mounted.
- the power transmission chain 252 hung on two output gears 251 is raised at a constant speed and quickly.
- the lifting auxiliary guide means 280 of the upper and lower two-stage connection form composed of the inner arm 281 and the outer arm 282 referred to as the X-shaped panter arm described above guides the stable lifting operation of the lifting table 210. It has become.
- the pair of meshing chains 110 and 110 are branched by the pair of driving sprockets 240 and 240 into the chain storage means 270 including the chain storage box 271 and the linear storage rail 272, respectively.
- the pair of meshing chains 110 and 110 are pulled by the output gear 251 according to the output of the drive motor 250 while supporting the entire weight of the lifting table 210 on which a heavy object (not shown) is mounted.
- the power transmission chain 252 descends at a constant speed and quickly.
- the vertical auxiliary guide means 280 composed of the above-mentioned X-shaped inner arm 281 and outer arm 282 in the upper and lower two-stage connection form guides the stable lowering operation of the lifting table 210 while being folded. ing.
- the driving sprocket 240 which is an example of the “chain motion restricting means” of the present invention, is a chain advance / retreat operation based on the meshing operation and the meshing operation of the pair of meshing chains 110, 110.
- the lifting / lowering table 210 that is, the driven body is moved forward / backward, so that the lifting / lowering table 210 is driven forward / backward by the chain stiffening portion 100A with improved rigidity. Therefore, the meshing chain unit 100 is connected to the chain stiffening portion 110A.
- the meshing chain unit 100 of the present embodiment obtained in this way has a hook-shaped meshing end surface 111a of two internal tooth plates 111 and 111 that mesh with each other when the pair of meshing chains 110 and 110 mesh with each other.
- 111a is a plate overlap region P when the pair of meshing chains 110, 110 are viewed from the plate normal direction perpendicular to the plate principal surfaces 111P, 112P of the inner tooth plate 111 and the outer tooth plate 112, ie, the chain width direction W.
- the plate overlap region P is in contact with the contact portion surfaces 111aa and 111aa, which contact each of the hook-shaped engagement end surfaces 111a and 111a of the two internal tooth plates 111 and 111, respectively.
- Transmission gear group 260 ... Chain invitation Plate 270 ⁇ ⁇ ⁇ Chain storage means 271 ⁇ ⁇ ⁇ Chain storage box 272 ⁇ ⁇ ⁇ Linear storage rail 280 ⁇ ⁇ ⁇ Lifting auxiliary guide means 281 ⁇ ⁇ ⁇ Inner arm 282 ⁇ ⁇ ⁇ Outer arm A ⁇ ⁇ ⁇ Stiffening chain Advancing / retreating direction B ... Chain engagement / disengagement direction C ... Intersection G ... Installation surface M ... Chain operation restricting means P ... Plate overlap area Pa ... Plate overlap part T ... Diagonal direction W ... Chain width direction
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Abstract
Description
また、リンクプレートの内側フランクすなわちスプロケット歯に噛み合う面の形状を規定してチェーン駆動時の騒音及び振動を低減するサイレントチェーン伝動装置がある(例えば、特許文献2参照。)。
また、上述の噛合チェーンでは、内歯プレート同士及び外歯プレート同士を相互に噛み合わせた際にこれらプレートに不均一な圧縮力を作用させてしまうため、相互に噛み合って一体化した一対の噛合チェーンのチェーン剛直化部分に生じる座屈やチェーン剛直化部分の捩れを回避することを困難にさせてしまうという問題点があった。
すなわち、噛合後のチェーンにおいて、不可避に生じる部品間の隙間ガタツキが残ってしまうため、チェーン剛直化部分に生じる座屈やチェーン剛直化部分の捩れを噛合時の不均一な圧縮力の作用を抑制することによって回避することを困難にさせてしまうという問題点があった。
また、噛合チェーンユニットは、チェーン幅方向に対向する一対の内歯プレートとこれら内歯プレートの外側にそれぞれ配置された一対の外歯プレートとを有して構成されたリンクユニットをチェーン長手方向にそれぞれ多数連結してなる複数列のチェーンユニットから構成されていてもよいし、単列のチェーンユニットから構成されていてもよい。
また、上述の外歯プレートの座屈規制端面と内歯プレートのフック状噛合端面とによって奏される効果は、外歯プレート及び内歯プレートの関係を相互に入れ替えて考えた場合すなわち内歯プレートの座屈規制端面と外歯プレートのフック状噛合端面との相互関係によっても同様に奏される。
また、一対の噛合チェーンのうち片側の噛合チェーンのフック状噛合端面または座屈規制端面の一部に凹状の切り欠きを設けたとしても、上述と同様の効果が奏される。
ここで、図1は、本発明の実施例に係る噛合チェーンユニットの分解組み立て状態を示す斜視図であり、図2は、一対の噛合チェーンが相互に噛み合う噛み合い部分の正面図である。
また、内歯プレート111に嵌合された状態で連結ピン113を遊嵌するブシュ114が、チェーン幅方向Wに沿って対向する一対の内歯プレート111、111の間に配置された状態でローラ115を外嵌している。
噛合チェーンユニット100は、一対の噛合チェーン110、110を相互に噛み合わせた際に相互に噛み合う2つの内歯プレート111、111のフック状噛合端面111a、111aが、内歯プレート111及び外歯プレート112のそれぞれのプレート主面111P、112Pに直交するプレート法線方向すなわちチェーン幅方向Wから一対の噛合チェーン110、110を見た場合にプレート重なり領域Pを構成するように形成され、このプレート重なり領域Pが、2つの内歯プレート111、111のフック状噛合端面111a、111aのそれぞれを相互に接触させた接触部分面111aa、111aaと相互に接触した2つの外歯プレート112、112のそれぞれの平坦な座屈規制端面112b、112bとで外縁を規定されている2つのプレート重なり部分Pa、Paの輪郭から構成され、2つのプレート重なり部分Pa、Paの輪郭の概形が、フック状噛合端面111a、111a及び座屈規制端面112b、112bの交差点Cに対して相互に点対称であることにより、噛合チェーンユニット100の中心の両側で相互に座屈規制端面112bに作用する圧縮力の不均一さを無くした状態で相互に噛み合ったフック状噛合端面111a、111a同士のチェーン噛み外れ方向Bに沿ったずれを回避して一対の噛合チェーン110、110の噛み外れを回避するとともに相互に接触した座屈規制端面112b、112b同士でこれら座屈規制端面112b、112bに作用する圧縮力のそれぞれを同一面内すなわち外歯プレート112を含む面内でつり合わせるため、内歯プレート111、111同士を強固且つ確実に噛み合わせるとともに内歯プレート111、111同士の噛み合いに伴う外歯プレート112、112同士の強固且つ確実な噛み合わせを実現するとともに相互に噛み合って一体化した一対の噛合チェーン110、110の剛直性を向上させてチェーン剛直化部分100Aの座屈や捩れを回避するようになっている。
なお、2つのプレート重なり部分Pa、Paの輪郭の概形全体が、フック状噛合端面111a、111a及び座屈規制端面112b、112bの交差点Cに対して相互に点対称である場合に限定されず、2つのプレート重なり部分Pa、Paの輪郭の概形の少なくとも一部が交差点Cに対して点対称であれば、上述した座屈や捩れを回避する効果は相応に得られる。
なお、チェーン動作規制手段M、Mは、噛合チェーンユニット100をその両側から押えてこれらチェーン動作規制手段M、Mの間の領域で剛直化チェーン進退方向Aに誘導するものであれば如何なるものでもよい。
ここで、図3は、本発明の噛合チェーンユニットを備えた噛合チェーン式進退作動装置200の斜視図であり、図4は、図3から昇降テーブル及びパンタアームを除いた状態の斜視図であり、図5は、図4に示す駆動用スプロケット近傍の一部拡大図であり、図6は、チェーン誘導プレート及び噛合チェーンの接触状態を示した図である。
すなわち、相互に噛み外れて分岐した一対の噛合チェーン110、110の一方は、駆動モータ250側に配置した巻き取り型のチェーン収納ボックス271からなるチェーン収納手段270内に収納されるとともに、一対の噛合チェーン110、110の他方は、駆動モータ250と対向する反対側に配置した直線状収納レール272からなるチェーン収納手段270内に収納される。
なお、スライドレール283は、インナーアーム281の下端を昇降動作に応じて摺動させる。
図3及び図6に示すように、昇降テーブル210が最上昇位置に達する場合、ローラ115に係合する一対の駆動用スプロケット240、240によって一対の噛合チェーン110、110がチェーン収納ボックス271と直線状収納レール272とからなるチェーン収納手段270からそれぞれ繰り出され、この一対の噛合チェーン110、110が重量物からなる被昇降物(図示していない)を搭載する昇降テーブル210の全重量を支えながら駆動モータ250の出力に応じて出力ギア251に2本掛けされた動力伝達チェーン252により等速かつ迅速に上昇するようになっている。
なお、このとき、前述したX字状のパンタアームと称するインナーアーム281とアウターアーム282からなる上下2段連結形態の昇降補助ガイド手段280が、昇降テーブル210の安定した上昇動作をガイドするようになっている。
なお、このとき、前述したX字状のインナーアーム281とアウターアーム282からなる上下2段連結形態の昇降補助ガイド手段280が、折り畳まれながら昇降テーブル210の安定した下降動作をガイドするようになっている。
100A ・・・ チェーン剛直化部分
110 ・・・ 噛合チェーン
111 ・・・ 内歯プレート
111a ・・・ 内歯プレートのフック状噛合端面
111aa ・・・ 内歯プレートの接触部分面
112b ・・・ 外歯プレートの座屈規制端面
111P、112P ・・・ プレート主面
112 ・・・ 外歯プレート
113 ・・・ 連結ピン
114 ・・・ ブシュ
115 ・・・ ローラ
200 ・・・ 噛合チェーン式進退作動装置
210 ・・・ 昇降テーブル
220 ・・・ ベースプレート
230 ・・・ 駆動用スプロケットの回転軸
240 ・・・ 駆動用スプロケット
250 ・・・ 駆動モータ
251 ・・・ 出力ギア
252 ・・・ 動力伝達チェーン
253 ・・・ 変速ギア群
260 ・・・ チェーン誘導プレート
270 ・・・ チェーン収納手段
271 ・・・ チェーン収納ボックス
272 ・・・ 直線状収納レール
280 ・・・ 昇降補助ガイド手段
281 ・・・ インナーアーム
282 ・・・ アウターアーム
A ・・・ 剛直化チェーン進退方向
B ・・・ チェーン噛み外れ方向
C ・・・ 交差点
G ・・・ 設置面
M ・・・ チェーン動作規制手段
P ・・・ プレート重なり領域
Pa ・・・ プレート重なり部分
T ・・・ 斜め方向
W ・・・ チェーン幅方向
Claims (3)
- 内歯プレートと該内歯プレートの外側に隣接配置されて内歯プレートと部分的な重なり領域を有する外歯プレートとを前後一対の連結ピンによりチェーン長手方向に多数連結してそれぞれ構成された状態で相互に噛み合って剛直化チェーン進退方向に一体に剛直化するとともに相互に噛み外れて分岐する一対の噛合チェーンを備えた噛合チェーンユニットであって、
前記一対の噛合チェーンを相互に噛み合わせた際に相互に噛み合う2つの内歯プレートのフック状噛合端面が、前記内歯プレート及び外歯プレートのそれぞれのプレート主面に直交するプレート法線方向から前記一対の噛合チェーンを見た場合にプレート重なり領域を構成するように形成され、
前記2つの外歯プレートのそれぞれの座屈規制端面が、前記剛直化チェーン進退方向に対する斜め方向に沿って相互に接触するように構成され、
該プレート重なり領域が、前記2つの内歯プレートのフック状噛合端面のそれぞれを相互に接触させた接触部分面と相互に接触した2つの外歯プレートのそれぞれの平坦な座屈規制端面とで外縁を規定されている2つのプレート重なり部分の輪郭から構成され、
前記2つのプレート重なり部分の輪郭の概形が、前記フック状噛合端面及び座屈規制端面の交差点に対して相互に点対称であり、
前記内歯プレートと前記外歯プレート及び前記連結ピンのいずれかまたは全てが、前記プレート重なり領域を形成する際に前記一対の噛合チェーンを剛直化させて部品間の遊びを無くした状態に弾性変形することを特徴とする噛合チェーンユニット。 - 前記一対の噛合チェーンが、該一対の噛合チェーンの動作を前記剛直化チェーン進退方向に沿って規制するチェーン動作規制手段によって相互に噛み合わせられることを特徴とする請求項1に記載の噛合チェーンユニット。
- 前記チェーン動作規制手段が、前記一対の噛合チェーンの噛合動作及び噛み外れ動作に基づいたチェーン進退動作に応じて被駆動体を進退動させる噛合チェーン式進退作動装置に設けられた駆動用スプロケットであることを特徴とする請求項2に記載の噛合チェーンユニット。
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US14/112,077 US9482313B2 (en) | 2011-04-20 | 2012-03-15 | Engagement chain unit |
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EP2700844B1 (en) | 2019-09-11 |
ES2759580T3 (es) | 2020-05-11 |
CN103492756A (zh) | 2014-01-01 |
JP2012225439A (ja) | 2012-11-15 |
EP2700844A4 (en) | 2015-10-07 |
KR101532503B1 (ko) | 2015-06-29 |
JP4865923B1 (ja) | 2012-02-01 |
US20140041467A1 (en) | 2014-02-13 |
EP2700844A1 (en) | 2014-02-26 |
US9482313B2 (en) | 2016-11-01 |
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CN103492756B (zh) | 2016-01-20 |
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