WO1997045348A1 - Convoyeur aerien - Google Patents

Convoyeur aerien Download PDF

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Publication number
WO1997045348A1
WO1997045348A1 PCT/SE1997/000937 SE9700937W WO9745348A1 WO 1997045348 A1 WO1997045348 A1 WO 1997045348A1 SE 9700937 W SE9700937 W SE 9700937W WO 9745348 A1 WO9745348 A1 WO 9745348A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive shaft
overhead conveyor
trolley
cradle
rotation
Prior art date
Application number
PCT/SE1997/000937
Other languages
English (en)
Inventor
Anders Persson
Jørgen SØLUND
Original Assignee
Ocs Overhead Conveyor System Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ocs Overhead Conveyor System Ab filed Critical Ocs Overhead Conveyor System Ab
Priority to AU31123/97A priority Critical patent/AU3112397A/en
Priority to EP97926334A priority patent/EP0907593A1/fr
Publication of WO1997045348A1 publication Critical patent/WO1997045348A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G35/00—Mechanical conveyors not otherwise provided for
    • B65G35/06—Mechanical conveyors not otherwise provided for comprising a load-carrier moving along a path, e.g. a closed path, and adapted to be engaged by any one of a series of traction elements spaced along the path
    • B65G35/063—Mechanical conveyors not otherwise provided for comprising a load-carrier moving along a path, e.g. a closed path, and adapted to be engaged by any one of a series of traction elements spaced along the path the traction element being a rotating bar or tube

Definitions

  • the present invention relates to overhead conveyor systems and more specifically concerns an overhead con ⁇ veyor of the type stated in the preamble to claim 1.
  • F ⁇ RDERSYSTEM HFS 2000 the trolleys are suspended from a superjacent track, under which a rotatable drive shaft is arranged.
  • the suspension is such that a moment is generated around the upper suspension point of the trolley and that this moment is counteracted horizontally by a rolling contact between the drive shaft and a roller which is rotatably mounted on the trolley below and at a distance from the suspen ⁇ sion point.
  • the system HFS 2000 suffers from certain drawbacks. Owing to the suspension arrangement, the trolley may be caused to swing around the suspension point, implying that the above-mentioned moment becomes too small or, if it comes to the worst, disappears momen ⁇ tarily, which may jeopardise the propulsion of the trolley. Moreover, the system is a single-side system since the trolleys can be deflected from the track in one direction only. Besides, the track must be stopped, for instance, when a trolley is to be propelled through a 180° curve or when the trolleys follow close upon each other. A further drawback is that special equipment e.g. turntables, is required m some positions where the track is to change direction, for instance in 180° curves. One more drawback is that the overall height of the system is relatively large.
  • An object of the present invention therefore is to provide an overhead conveyor which is improved in rela ⁇ tion to prior art technique and which eliminates the above-mentioned drawbacks and in which the trolleys are safely suspended and have a great freedom of being de ⁇ flected in different directions.
  • an overhead conveyor which is of the type described by way of introduction and which in addition has the fea ⁇ tures stated in the characterising clause of claim 1.
  • Preferred embodiments of the invention are recited in the appended subclaims.
  • an overhead conveyor system is provided, in which the trolleys have a moment- based suspension, which ensures a contact, reliable to the propulsion of the trolley, between the engaging means and the drive shaft.
  • the great advantage is achieved according to the invention that the system is compact and obtains a much smaller overall height than similar prior art systems.
  • the overall height of a system according to the invention is about five times smaller than the over- all height of the known system HFS 2000 as discussed above.
  • a further essential advantage is that the trolleys included in the inventive overhead conveyor, in the pre ⁇ ferred embodiment, can be deflected from the track in each direction owing to the positioning of the cradle under the drive shaft.
  • Fig. 1 is a perspective view, seen obliquely from above and with certain parts cut away, of the suspension of a trolley included in an overhead conveyor according to a first embodiment of the invention
  • Fig. 2 is an elevational view of the suspension in the direction II-II in Fig. 1,
  • Fig. 3 is a simplified view of the forces and the moment acting in Fig. 2,
  • Fig. 4 is a view, corresponding to Fig. 2, of a second embodiment of the invention.
  • Fig. 5 is a view, corresponding to Fig. 4, of a third embodiment of the invention.
  • Fig. 1 shows under the general designation 1 an overhead conveyor according to a first embodiment of the invention.
  • the conveyor 1 comprises a supporting means, generally designated 2, in the form of a sectional ele ⁇ ment of substantially U-shaped cross-section, both U legs 3, 4 being directed downwards and the U web 5 being arranged horizontally.
  • the U web 5 has, in a manner known per se, means 6 for suspending the carrying sectional element 2 from the roof (not shown) .
  • the one U leg 3 is longer than the other U leg 4 and has at its lower longitudinal edge a downwardly directed portion 8 of forked or U-shaped cross-section, which will be described in more detail below.
  • a drive shaft 9 is arranged, which is here shown in the form of a tube and which is rotatably mounted by means of mounting elements (not shown) arranged inside the carrying sectional element 2.
  • a cradle 12 provided with rollers 10 and support rollers 11 and belonging to a trolley generally designated 13 is arranged under the drive shaft 9.
  • the drive shaft 9 is rotated in the direction of arrow A, the cradle 12 and, thus, the trolley 13 are propelled in the direction of arrow B by the two inclined, freely rotatable rollers 10 being in rolling and f ⁇ ctional contact with the circumferential surface of the drive shaft 9.
  • the four inclined, freely rotatable support rollers 11 are in rolling contact with the two opposite, arched upper sides 8a, 8b of the lower forked edge portion 8 of the U leg 3, said edge portion being parallel with the drive shaft 9.
  • the axes of rotation 19 for two opposite support rollers 11 intersect in a point above said edge portion 8 where rolling contact takes place.
  • the angle of intersection is advantageously about 45°.
  • Fig. 2 illustrates in more detail the design of the cradle 12 and the rolling contact of the rollers 10 with the rotatable drive shaft 9 as well as the rolling con- tact of the support rollers 11 with the lower edge por ⁇ tion 8 of the carrying sectional element 2.
  • a schematically illustrated load carrier 14 belong ⁇ ing to the trolley 13 applies a downward force which is indicated by an arrow FI .
  • the support rollers 11, together with the forked por ⁇ tion 8 of the U leg 3 will form abutment means which generate a moment M, which in turn gives the essentially upwardly directed engaging force of the rollers 10 against the drive shaft 9.
  • This engaging force is mdi- cated by an arrow F2 in Fig.
  • the overhead conveyor 1 thus comprises a number of sus ⁇ pended trolleys 13 which are propellable along a track and of which only one is shown in the drawings and which each have a means in the form of the rollers 10 for engaging the outside of the rotatable drive shaft 9, which by its rotation propels the trolley 13 along the track via said engagement.
  • the cradle 12 belonging to the trolley 13 and arranged in connection with the suspension of the trolley 13 has a first portion 15, on which the engaging rollers 10 are arranged, and a second portion 16, which is spaced from the drive shaft 9 and on which the load carrier 14 of the trolley 13 applies the downward force FI .
  • the moment-based suspension illustrated in Fig. 2 confers one more important advantage compared with e.g. the system HFS 2000.
  • the trolley 13 can be deflected from the track in both directions.
  • this is achieved by a branch track, which preferably has a roller profile corre ⁇ sponding to the forked portion 8, being swung into a broken-off portion of the carrying sectional element 2, the freely rotatable support rollers 11 rolling onto said branch track (not shown) .
  • the composition of the entire system will be flexible, since curves and the like can easily be provided by means of various bends and designs of the carrying sectional element.
  • the rollers 10 can be disengaged from the drive shaft 9 and the trolley 13 can be propelled only by the rolling contact of the support rollers 11 with, for instance, a curved carrying sectional element or the like (not shown) .
  • the number of engaging rollers 10 and support rol ⁇ lers 11 is not decisive of the invention as long as an appropriate engagement with the drive shaft 9 is obtained and the required abutment for generation of moment is obtained between the support rollers 11 and the carrying sectional element 2.
  • the engaging means preferably comprises two inclined, freely rotatable rollers 10, which in their driving position are m rolling and frictional contact with the circumferential surface of the drive shaft 9.
  • each roller 10 is permanently inclined by its axis of rotation 18 making an angle with the axis of rotation 17 of the drive shaft 9.
  • the rollers 10 are adjustably inclined between two end positions, in which the axis of rotation of the rollers 10 makes a maximum angle of de ⁇ flection with the axis of rotation 17 of the drive shaft 9.
  • the axis of rotation 18 of the rollers 10 is parallel to the axis of rotation 17 of the drive shaft 9.
  • Fig. 4 shows the second embodiment, in which the supporting means 2 is differently designed and the cradle 12 has a slightly modified suspension.
  • the supporting means 2 comprises an elongate rail 20, which, via a schematically shown connection 21, is connected to one leg 3 of the supporting means 2.
  • the previously inclined support rollers 11 in the first embodiment are replaced by opposite support rollers 11a, lib, which are in rol ⁇ ling contact with the rail 20.
  • the rolling surfaces of the support rollers 11a, lib are so adapted to the corre ⁇ sponding, arched upper and lower rolling surfaces of the rail 20 as to obtain a reliable rolling contact and ab ⁇ sorption of moment.
  • the third embodiment which is based on the second, is shown m Fig. 5.
  • the supporting rail 20a connected with the leg 3 has been given a modified design, and the lower support rollers lib are replaced by a moment- absorbing sliding contact.
  • the supporting rail 20a has in fact a downwardly directed, fixed flange 22, which is in sliding contact with a fixed projection 23 on the cradle 12. This embodiment results in a very reliable absorption of moment.
  • a common feature of the described three embodiments is that the cradle 12 between its first and its second portion 15, 16 has an abutment means, which by rolling or sliding contact with some part of the supporting means 2 generates a moment which ensures the rolling contact between the rollers 10 and the drive shaft 9, which in turn ensures the propulsion of the trolley 13. It should also be pointed out that the play of forces F1-F2 and the moment generated therefrom are similar in the three em ⁇ bodiments.
  • the invention is generally applicable also to other techniques of propelling trolleys in an overhead conveyor system.
  • the rotatable drive shaft may for instance have an external, helical groove (not shown) , with which the engaging means of the cradle is engaged.
  • the engaging means then preferably has the form of a freely rotatable roller, which runs in the helical groove of the drive shaft.
  • the engaging means may be of a different design, e.g. a fixed follower in the form of a pin extending into the groove.
  • the drive shaft need not necessarily be arranged in the supporting means, which may have a different cross-sectional shape, and that other arrangements are possible with a view to achieving the intended engagement with the drive shaft and abutting effect against the supporting means.
  • That part of the supporting means with which the support rollers are in rolling contact may have a different design as long as the intended rolling is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chain Conveyers (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)

Abstract

Un convoyeur aérien comporte des chariots suspendus (13) qui sont propulsés le long d'un chemin de guidage et qui présentent chacun des galets (10) destinés à venir contre un arbre mené rotatif (9) placé à proximité d'un rail porteur (2) et qui en tournant propulse le chariot (13) le long du chemin de guidage. Chaque chariot (13) comporte, relié à sa suspension, un étrier (12) qui présente une première partie (15) sur laquelle lesdits galets (10) sont placés et une seconde partie (16) située à une certaine distance de l'arbre d'entraînement (9) sur laquelle la partie porteuse (14) du chariot (13) applique une force de pesanteur (F1). Le chariot (12) comporte, entre sa première et sa seconde partie (15, 16), des galets de support (11) qui, par contact mutuel avec ledit rail de support (2) produisent un moment, qui est généré par ladite force de pesanteur (F1) et qui à son tour produit la force qui permet de pousser les galets (10) contre l'arbre d'entraînement (2).
PCT/SE1997/000937 1996-05-31 1997-05-30 Convoyeur aerien WO1997045348A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU31123/97A AU3112397A (en) 1996-05-31 1997-05-30 Overhead conveyor
EP97926334A EP0907593A1 (fr) 1996-05-31 1997-05-30 Convoyeur aerien

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602160A SE506609C2 (sv) 1996-05-31 1996-05-31 Hängtransportöranordning
SE9602160-5 1996-05-31

Publications (1)

Publication Number Publication Date
WO1997045348A1 true WO1997045348A1 (fr) 1997-12-04

Family

ID=20402831

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/000937 WO1997045348A1 (fr) 1996-05-31 1997-05-30 Convoyeur aerien

Country Status (4)

Country Link
EP (1) EP0907593A1 (fr)
AU (1) AU3112397A (fr)
SE (1) SE506609C2 (fr)
WO (1) WO1997045348A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457418B1 (en) 1998-12-07 2002-10-01 Ocs Overhead Conveyor System Ab Conveyor system with an overhead load carrier
DE10164478A1 (de) * 2001-12-24 2003-07-03 Edag Eng & Design Ag Transportvorrichtung
US7421953B2 (en) * 2002-05-22 2008-09-09 Ocs Overhead Conveyor System Ab Coupling device in overhead conveyor system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858707A (en) * 1973-11-07 1975-01-07 Rockford Automation Conveyor system
DE2347459A1 (de) * 1973-09-20 1975-04-10 Michel Baud Haenge-foerdervorrichtung
EP0310511A1 (fr) * 1987-09-30 1989-04-05 SOCIETE GENERALE POUR LES TECHNIQUES NOUVELLES S.G.N. Société anonyme dite: Dispositif de transfert de produits à irradier, en particulier de produits alimentaires
GB2233622A (en) * 1989-07-10 1991-01-16 Webb Int Co Jervis B Conveyor systems.
WO1991008970A1 (fr) * 1989-12-15 1991-06-27 Transtex Produktionsgesellschaft Mbh Rail creux profile autoporteur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2347459A1 (de) * 1973-09-20 1975-04-10 Michel Baud Haenge-foerdervorrichtung
US3858707A (en) * 1973-11-07 1975-01-07 Rockford Automation Conveyor system
EP0310511A1 (fr) * 1987-09-30 1989-04-05 SOCIETE GENERALE POUR LES TECHNIQUES NOUVELLES S.G.N. Société anonyme dite: Dispositif de transfert de produits à irradier, en particulier de produits alimentaires
GB2233622A (en) * 1989-07-10 1991-01-16 Webb Int Co Jervis B Conveyor systems.
WO1991008970A1 (fr) * 1989-12-15 1991-06-27 Transtex Produktionsgesellschaft Mbh Rail creux profile autoporteur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457418B1 (en) 1998-12-07 2002-10-01 Ocs Overhead Conveyor System Ab Conveyor system with an overhead load carrier
DE10164478A1 (de) * 2001-12-24 2003-07-03 Edag Eng & Design Ag Transportvorrichtung
US7421953B2 (en) * 2002-05-22 2008-09-09 Ocs Overhead Conveyor System Ab Coupling device in overhead conveyor system

Also Published As

Publication number Publication date
SE506609C2 (sv) 1998-01-19
EP0907593A1 (fr) 1999-04-14
SE9602160L (sv) 1997-12-01
AU3112397A (en) 1998-01-05
SE9602160D0 (sv) 1996-05-31

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