EP2917607A1 - Chaîne de transporteur de fortes charges et procédé - Google Patents

Chaîne de transporteur de fortes charges et procédé

Info

Publication number
EP2917607A1
EP2917607A1 EP13852633.0A EP13852633A EP2917607A1 EP 2917607 A1 EP2917607 A1 EP 2917607A1 EP 13852633 A EP13852633 A EP 13852633A EP 2917607 A1 EP2917607 A1 EP 2917607A1
Authority
EP
European Patent Office
Prior art keywords
chain
inch
nominal
pitch
links
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP13852633.0A
Other languages
German (de)
English (en)
Other versions
EP2917607A4 (fr
Inventor
Charles C. Frost
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frost Tech LLC
Original Assignee
Frost Tech LLC
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 Frost Tech LLC filed Critical Frost Tech LLC
Priority claimed from PCT/US2013/068733 external-priority patent/WO2014074594A1/fr
Publication of EP2917607A1 publication Critical patent/EP2917607A1/fr
Publication of EP2917607A4 publication Critical patent/EP2917607A4/fr
Withdrawn legal-status Critical Current

Links

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
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/06—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
    • 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
    • B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
    • B65G17/20—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising load-carriers suspended from overhead traction chains

Definitions

  • the presen invention relates to overhead conveyors, which typically comprise at least an. ui beam" track., trolleys which have opposed wheels engaging the bottom flanges of said I beam track on opposite sides of the center web of the beam., and a driven conveyor chain connected to said trolleys at spaced intervals.
  • the chains usually comprise center links alternating with a pair of side links, which overlap the end of the center link on the opposite sides thereof, and are joined to the center link by a pin passing through the overlapping ends of the side links and center links.
  • the links of said chains come in lengths giving them a nominal 2 inch, 3 inch, 4 inch or 6 inch pitch dimension.
  • the pitch is the distance between the centers of adjacent pins, and is referred to as nominal, as the pitch is typically 1/16 of an inch more than the nominal number.
  • the actual length of each chain link is long enough to provide for the overlap, and leave the nominal pitch dimension as indicated.
  • Chains are Identified in part by their pitch.
  • a chain with a two Inch pitch is referred to as a 2 inch chain, and so on.
  • a 2 Inch chain uses pins which are 2/8 (1 /4) Inch in diameter, and hence is referred to more specifically as an X .228 chain.
  • a 3 inch chain uses pins which, are 4/8 (1 2) inch ui diameter, and is more specifically identified as an X 348 chain. These and other dimensions for 2, 3, 4 and 6 inch chains are set forth in Table 1 , with dimension "F" being the pin diameter. The other dimensions, A,. 8, C, etc listed in Table 1 are indicated in FIGS. 3 and 2. These are industry standards established through years of practice, and are ' set forth in the publications of the Conveyor Equipment Manufacturers Association (CEMA).
  • CEMA Conveyor Equipment Manufacturers Association
  • Trolleys are connected to the driven chains by a depending leg which passes through, the opening in a center link.
  • trolleys can be spaced as close as nominally 4 inches for a two inch chain, or in multiples thereof. For a three inch chain, the spacing would be six inches or multiples thereof, for a four inch, eight inches or multiples and tor a six inch, 1.2 inches or multiples thereof.
  • the pitch of the chain used matches the nominal height of the I beam track used.
  • the height of the beam may be hi gher than its nominal value, e.g. the actual height of a 2 inch beam is 2 5/8 inches.
  • trolleys are referred to by their nominal wheel diameter, which corresponds to the .nominal height of the beam track they are carried on. The actual, diameter is slightly less than the actual height of the I beam, so there is no binding of the trolley wheel between the lower beam flange and the upper beam, flange.
  • a trolley with a nominal wheel diameter of 2 inches is used on a nominal 2 inch beam
  • a nominal 3 inch diameter wheel trolley is used on a nominal 3 inch beam
  • a 4 on a 4 and a 6 on a 6.
  • Chain pull load refers to the load placed on the chain as it pulls its associated trolleys and any loads they are carrying.
  • a 3 nch chain has a maximum allowable chain pull load of 1500 pounds.
  • For a 4 inch chain it is 3000 pounds, and for a six inch chain, 5500 pounds.
  • Trolleys are referred to by their nominal wheel diameter, which by industry- standard and practice corresponds to the nominal beam height.
  • the drive chain is driven by one or more drives. Multiple drives must be synchronized, and are used to make sure the maximum chain pull load for the chain is not exceeded in any portion thereof.
  • the present invention comprises an overhead conveyor, components therefor and method for making same, in. which the conveyo chain has a nominal pitch "X,” but a maximum allowable chain pull, value which is equal to or greater than the maximum allowable chain pull value for a chairs, having a nominal pitch of X+ 1.
  • the conveyor chain lias a pitch which is less than the nominal height of the beam on which it is carried, but has a maximum allowable chain pull, value which is equal to or greater than thai of a chain having a pitch equal to or greater than the height of the beam,
  • trolleys can be attached to said chain at intervals which differ from the intervals of a chain with pitch corresponding to the nominal height of the team. Another is that fewer synchronized dr es are required for driving longer chains, Yet another is that a lower pitch chain can be used to drive larger trolleys, without sacrificing the maximum allowable chain pull value always used in conjunction with the larger trolley. Thus for example, a 2 inch chain can drive 3 inch trolleys, with the same maximum allowable chain pull value provided by a 3 inch chain.
  • FIG. 1 is a side elevational view of a chain segment identifying dimensions provided in
  • FIG. 2 is a top plan view of a chain segment identifying dimensions provided in Table 1. :
  • FIG. 3 is a side elevational view of a three inch beam carrying a three inch chain with trolleys spaced at six inches;
  • FIG. 4 is a side elevational vie of a three inch beam carrying a two Inch chain of strength, comparable, that of a three inch chain, with trolleys spaced at eight inches;
  • FIG. 5A is a side elevational view of the adjoining links and pin for a two inch chain having the strength of a three inch chain
  • FIG. SB is a side elevational view of the adjoining links and a pin for a conventional ' two inch chain.
  • FIG.. 6A is a top plan view of the adjoining links of FIG. 5A.
  • FIG. 6B is a top plan vie of the adjoining links of FIG. 513.
  • 3 inch chain .1 a driving 3 inch trolleys 20a o a 3 Inch beam 30a. (FIG. 3), to a 2 inch chain 10b driving 3 inch trolleys 20b on a 3 Inch beam 30a (FIG. 4).
  • Each chain has center links I l a or 1 lb respectively, joined by pairs of side links 12a or 1.2b, The adjacent links are joined by pins 13a . and 13b respectively.
  • One of the advantages of the present invention is thai by using a 2 inch chain 10b with the strength of the 3 inch chain 10a or greater, one can achieve the same or greater maximum allowable chain put! load while giving the operator greater flexibility in trolley spacing.
  • an operator using a 2 inch chain of the present invention enjoys the same maximum allowable chain pull load as the operator using a 3 inch chain, but can. space the trolleys 20b as close as 4 inches, or at multiples thereof. While a 6 inch spacing might be too close for the operator's proposed use, a 12 inch spacing may simply waste space, and require a higher chain speed to achieve the desired level of productivity.
  • the operator can. use a spacing of 8 inches, rather than 6 inches, without sacrificing maximum, allowable chain pull toad, merel by securing a trolley to every other center link as shown in FIG. 4, The same level of productivity can be achieved using a proportionally lower chain speed.
  • the 2 inch chain 10b is given the strength of the 3 inch chain lOa byi
  • the preferred embodiment 2 inch chain iOb is identified more specifically as an X-248 chain, rather than as a prior art X-228 chain.
  • the pins used in the 3 and 4 inch preferred embodiment chains would have -diameters of 5/8 and 7/8, and would be more specifically identified as X-3,58 and X 478 chains, rather than conventional X--34S and X-458.
  • center links lib of the preferred embodiment 2 inch chain 30b have, spaced side legs
  • the center link. legs in aii of the preferred embodiment chains are 50-75% taller than their corresponding prior art counterparts, i.e. industry standard center links for chains of the same pitch, Similarly, the thickness of the leg portions b of center link 1 l b are .26 inch as compared to J 9 inch thickness for the legs 14c of a prior art 2 inch, chain iOc.
  • the center link legs in all of the preferred embodiment chains are 25- 50% thicker than their prior art industry standard counterparts.
  • the corresponding dimensions for spaced legs 15b and 15c of the side links 12b and 12c are:
  • the side link legs in all of the preferred embodiment chains are 25-50% taller, and 25-50% thicker than their corresponding prior art counterparts.
  • Other measures can be taken to farther strengthen the 2 inch chain 10b of the preferred embodiment hi a similar manner, the dimensions of the links used in. the 3 and 4 inch chains of the preferred embodiment chains are larger in similar proportions than those of corresponding prior art 3 and 4 inch chains.
  • the trolleys 20a and 20b shown in FIGS. 3 and 4 have a pair of wheels 21 a and 21 b respectively, each wheel being oriented on an. opposite of its respective beam 30a
  • a pair of amis 22a and 22b respectively extend, downwardly, one from each of the opposed wheels 21a or 21b.
  • Arms 22a and. 22b respectively extend downwardly and then inwardly towards one another, and then downwardly again to define downwardly depending legs 25a and 25b.
  • the legs 25a and .25b pass through the openings in the respective center links 1 .1a and l i b.
  • A. downwardly depending, working attachment (not shown) may be secured between said legs 25.
  • the working attachment might be a hook for hanging material to convey, or a pusher for pushing free trolleys on a lower track, or some oilier device.
  • leg 25b of trolley 20b is slightly narrower than leg 25a of trolley 20a. This allows leg
  • trolley 20b includes an additional rib 24b extending between the two ribs 23b, located so as to be adjacent the top and bottom of the leg of center link l i b (compare FiG. 4 to FIG. 3). TMs gives greater strength to the narrower leg 25b of trolley 20b. No such joining rib 24 is used in the trolleys 20a.
  • Another advantage is that the higher maximum chain pull value makes possible the use of fewer synchronized drives to drive the chain. Yet another is that a lower pitch chain can be used to drive larger trolleys, without sacrificing the maximum allowable chain pull value always used in conjunction with the larger trolley. Thus for example, a 2 inch chain cm drive 3 inch trolleys, with the same maximum allowable- chain pull value provided by a 3 inch chain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chain Conveyers (AREA)

Abstract

L'invention porte sur un transporteur supérieur, sur des éléments pour celui-ci et sur un procédé pour sa réalisation, dans lesquels la chaîne de transporteur a un pas nominal « X », mais une valeur de traction de chaîne admissible maximale qui est supérieure ou égale à la valeur de traction de chaîne admissible maximale pour une chaîne ayant un pas nominal de X + 1. Des chariots peuvent être attachés à la chaîne à des intervalles qui diffèrent des intervalles d'une chaîne avec un pas de X + 1. Moins d'entraînements synchronisés sont nécessaires pour entraîner des chaînes plus longues. Une chaîne à pas plus petit peut être utilisée pour entraîner des chariots plus grands, sans sacrifier la valeur de traction de chaîne admissible maximale toujours utilisée en association avec le plus grand chariot.
EP13852633.0A 2012-11-07 2013-11-06 Chaîne de transporteur de fortes charges et procédé Withdrawn EP2917607A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261723482P 2012-11-07 2012-11-07
PCT/US2013/068733 WO2014074594A1 (fr) 2012-11-07 2013-11-06 Chaîne de transporteur de fortes charges et procédé

Publications (2)

Publication Number Publication Date
EP2917607A1 true EP2917607A1 (fr) 2015-09-16
EP2917607A4 EP2917607A4 (fr) 2016-07-27

Family

ID=53783481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13852633.0A Withdrawn EP2917607A4 (fr) 2012-11-07 2013-11-06 Chaîne de transporteur de fortes charges et procédé

Country Status (1)

Country Link
EP (1) EP2917607A4 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2117988A (en) * 1932-08-08 1938-05-17 Alvey Ferguson Co Overhead traveling conveyer
US4267778A (en) * 1979-08-13 1981-05-19 Wilkie William V Overhead conveyor track system
US6588579B2 (en) * 2001-03-27 2003-07-08 Jerry Taeger Conveyor system accessories

Also Published As

Publication number Publication date
EP2917607A4 (fr) 2016-07-27

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