WO2009047616A1 - Method for manufacturing links of a conveyor and links of a conveyor obtained with this method - Google Patents

Method for manufacturing links of a conveyor and links of a conveyor obtained with this method Download PDF

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Publication number
WO2009047616A1
WO2009047616A1 PCT/IB2008/002655 IB2008002655W WO2009047616A1 WO 2009047616 A1 WO2009047616 A1 WO 2009047616A1 IB 2008002655 W IB2008002655 W IB 2008002655W WO 2009047616 A1 WO2009047616 A1 WO 2009047616A1
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WO
WIPO (PCT)
Prior art keywords
link
cavity
links
seat
pivot
Prior art date
Application number
PCT/IB2008/002655
Other languages
French (fr)
Other versions
WO2009047616A9 (en
Inventor
Carlo Garbagnati
Norberto Cattaneo
Original Assignee
Regina Catene Calibrate S.P.A.
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 Regina Catene Calibrate S.P.A. filed Critical Regina Catene Calibrate S.P.A.
Publication of WO2009047616A1 publication Critical patent/WO2009047616A1/en
Publication of WO2009047616A9 publication Critical patent/WO2009047616A9/en

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
    • B65G17/30—Details; Auxiliary devices
    • B65G17/38—Chains or like traction elements; Connections between traction elements and load-carriers
    • B65G17/40—Chains acting as load-carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21L—MAKING METAL CHAINS
    • B21L9/00—Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains
    • B21L9/02—Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains of roller-chain or other plate-link type
    • B21L9/06—Sorting, feeding, assembling, riveting, or finishing parts of chains
    • 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
    • B65G17/08—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 the surface being formed by the traction element
    • 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
    • B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
    • B65G2207/12—Chain pin retainers

Definitions

  • the present invention relates to an innovative method for manufacturing links of a conveyor, in particular a belt conveyor.
  • the invention also refers to the link obtained with this method.
  • the links are suitable for being interconnected in sequence by transverse connecting pivots that are transverse to the conveying direction of the belt.
  • Several links can be placed alongside laterally to obtain a belt of the desired width.
  • Each link is provided on the front and rear side with a series of hinging protrusions provided with a hole for forming a seat respectively for the connecting pivot with a subsequent link and for the connecting pivot with a preceding link.
  • a stopping element is provided that is received in a cavity of the link so as to be able to move between an operating position in which it locks the pivot in the seat and a non-operating position in which the pivot can be removed from the seat or be inserted therein.
  • the links and the stopping element are made separately by forging. Once the pieces have been obtained the stopping element is snap-inserted into the cavity formed in the link. In order to enable the snap- insertion, the two pieces have to be specially shaped; the cavity is forged open on a lower face of the link and on a lateral side so as to make an undercut with respect to an insertion direction of the stopping element that is necessary for retaining the piece in the cavity.
  • the stopping element may not necessarily have walls flush with both faces of the link in which the openings of the relative receiving cavity open. This may lead to problems with sliding of the link (and of the belt) on the guiding surfaces of the conveyor. Further, the stopping element, being snappable into the cavity, could also be accidentally removed from the belt, making the link unusable.
  • the general object of the present invention is to remedy the aforementioned drawbacks by providing a manufacturing method that enables a link of the aforesaid type to be created that has satisfactorily continuous surfaces and improved and reliable guiding sliding.
  • a further object of the invention is to supply a link provided with a stopping element that is retained in the specific seat in a secure and reliable manner.
  • a link for a conveyor that is suitable for being interconnected in sequence with adjacent links by connecting pivots that are transverse to the conveying direction, the link comprising a body provided with a cavity positioned at an end of a receiving seat of a connecting pivot, said cavity containing a stopping element movable in the cavity between a locked operating position of the pivot in the seat of the pivot and a non-operating position in which the pivot is removable from the seat, characterized in that the locking element is overforged in the cavity of the body of the link.
  • FIG. 1 is a perspective view of part of a link made using the method according to the invention.
  • FIG. 1 is a plan view of the link part of the preceding figure
  • figure 3 is a section view according to plane III-III shown in figure 2;
  • - figure 4 is a raised view of the link of the preceding figures
  • - figure 5 is a section view according to plane V-V shown in figure 4 with the stopping element in a non-operating position
  • FIG. 6 is a section view that is similar to the preceding one with the stopping element in the locked position of the connecting pivot.
  • figure 1 there is shown part of a link 10 of a belt conveyor, of the type comprising a plurality of links interconnected in sequence by connecting pivots that are transverse to the movement direction of the belt.
  • the belt can comprise several links placed alongside one another to obtain a desired conveyor width, for example with links staggered like bricks according to a known prior-art arrangement.
  • the link 10 shown in the figures is an end link, arranged at a lateral end of the belt.
  • the link 10 comprises a body 11 in which are obtained two seats 14, 15 respectively for a front connecting pivot
  • the body 11 has an elongated shape with a greater extent parallel to that of the connecting pivots between the links.
  • the seats 14, 15 consist of a series of aligned holes obtained in a plurality of protrusions respectively 12 and 13 for receiving transverse pivots.
  • the protrusions 12, 13 alternate along the extent of the pivots with corresponding protrusions of the adjacent links.
  • the body 11 there is formed a cavity 19 at an end of the seat 14 of the connecting pivot at an end 17 of the link 10 intended for forming a lateral side of the conveyor belt.
  • a stopping element 18 which is movable between a non-operating position in which the pivot can be inserted into or removed from the seat 14 (clearly shown in figures 1, 2, 5) and an operating position in which the pivot is locked in the seat (see figure 6) .
  • Both the stopping element and the body of the link can be made with known plastics used in the field, for example acetylene or polypropylene .
  • the stopping element 18 is overforged inside the cavity 19.
  • the body 11 is forged by using a die provided with suitable drawers that form the cavity 19 with two openings on two faces of the body 11, advantageously on the lower face 30 and on the side face 31, that are orthogonal to one another.
  • the stopping element 18 is overforged on the piece forged in the die, the configuration of the drawers in the cavity 19 being suitably changed to create a cavity for overforging the element 18 to be formed movably between the two positions of figures 5-6.
  • the arrangement of the drawers of the dies is not disclosed in detail here and can be achieved in any manner that is easily imaginable by those skilled in the art.
  • the element 18 is overforged so as to remain trapped in the cavity 19.
  • the plasties of the two pieces can be different from one another.
  • the piece 18 can be made of different material so as to have greater withdrawal than that of the body 19, so as to ensure the necessary mobility of the stopping element between the two positions thereof after the stopping element has been overforged.
  • the stopping element has surfaces that are flush with the openings of the cavity 19 on the faces 30 and 31 of the body 11. This enables the external surfaces of the link 10 to be made satisfactorily continuous, improving in particular the sliding of the link with respect to the guides of the conveyor .
  • the locking element is snappably movable between the operating position and the non-operating position.
  • the element 18 in fact has a protrusion 21 that is alternatively suitable for snappably engaging in the recesses 32 (non-operating position of figures 1, 2 and 5) and 20 (operating position of figure 6) obtained on the side of the cavity 19 facing the centre of the link 10.
  • the link 10 is a lateral link of the belt, which link is intended to be placed alongside other similar links.
  • a link with a receiving seat for the blind pivot there may be provided a link with a receiving seat for the blind pivot, so that the latter remains fixed in the belt and cannot move laterally thereto when the stopping element 18 is in the locked position.
  • a method for manufacturing links for conveyors, which links are provided with stopping elements of the connecting pivot in which the surfaces of the link are more continuous than prior-art links are. This enables the guiding surfaces of the belt to be improved. Further, the stopping element is imprisoned inside the body of the link, preventing it being able to be removed accidentally from the link.
  • the stopping element and the respective seat could be shaped in a different manner from what was disclosed above to provide a movement of the stopping element that is different from a rectilinear movement, for example, the stop could be rotatable to be moved between the locked operating position of the pivot and the non-operating position for inserting/removing the pivot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chain Conveyers (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Control Of Conveyors (AREA)
  • Belt Conveyors (AREA)

Abstract

A method for manufacturing links of a conveyor of the type comprising a plurality of links interconnected in sequence by connecting pivots that are transverse to the conveying direction, comprising the steps of : - stamping a body of the link (11) provided with a receiving seat (14) of a connecting pivot and with a cavity (19) arranged at an end of said seat, - co-stamping inside said cavity (19) of the body (11) of the link a stopping element (18) so that it is imprisoned inside the cavity (19) and is movable between a locked operating position of the pivot in the seat and a non-operating position in which the pivot can be removed from the seat.

Description

"METHOD FOR MANUFACTURING LINKS OF A CONVEYOR AND LINKS OF A CONVEYOR OBTAINED WITH THIS METHOD"
The present invention relates to an innovative method for manufacturing links of a conveyor, in particular a belt conveyor. The invention also refers to the link obtained with this method.
In the prior art, making links for belt conveyors is known, the links are suitable for being interconnected in sequence by transverse connecting pivots that are transverse to the conveying direction of the belt. Several links can be placed alongside laterally to obtain a belt of the desired width. Each link is provided on the front and rear side with a series of hinging protrusions provided with a hole for forming a seat respectively for the connecting pivot with a subsequent link and for the connecting pivot with a preceding link.
At an end of the seat of the pivot a stopping element is provided that is received in a cavity of the link so as to be able to move between an operating position in which it locks the pivot in the seat and a non-operating position in which the pivot can be removed from the seat or be inserted therein. The links and the stopping element are made separately by forging. Once the pieces have been obtained the stopping element is snap-inserted into the cavity formed in the link. In order to enable the snap- insertion, the two pieces have to be specially shaped; the cavity is forged open on a lower face of the link and on a lateral side so as to make an undercut with respect to an insertion direction of the stopping element that is necessary for retaining the piece in the cavity.
According to this prior art, at least a surface of the link has considerable discontinuity, as the stopping element may not necessarily have walls flush with both faces of the link in which the openings of the relative receiving cavity open. This may lead to problems with sliding of the link (and of the belt) on the guiding surfaces of the conveyor. Further, the stopping element, being snappable into the cavity, could also be accidentally removed from the belt, making the link unusable.
The general object of the present invention is to remedy the aforementioned drawbacks by providing a manufacturing method that enables a link of the aforesaid type to be created that has satisfactorily continuous surfaces and improved and reliable guiding sliding.
A further object of the invention is to supply a link provided with a stopping element that is retained in the specific seat in a secure and reliable manner.
In view of this object it has been decided to devise, according to the invention, a method for manufacturing links of a conveyor of the type comprising a plurality of links interconnected in sequence by transverse connecting pivots that are transverse to the conveying direction, comprising the steps of:
- forging a body of the link provided with a receiving seat of a connecting pivot and of a cavity arranged at an end of said seat, - overforging inside said cavity of the body of the link a stopping element so that it is imprisoned inside the cavity and is movable between a locked operating position of the pivot in the seat and a non-operating position in which the pivot can be removed from the seat.
Still according to the invention it was decided to devise a link for a conveyor that is suitable for being interconnected in sequence with adjacent links by connecting pivots that are transverse to the conveying direction, the link comprising a body provided with a cavity positioned at an end of a receiving seat of a connecting pivot, said cavity containing a stopping element movable in the cavity between a locked operating position of the pivot in the seat of the pivot and a non-operating position in which the pivot is removable from the seat, characterized in that the locking element is overforged in the cavity of the body of the link. In order to make clearer the explanation of the innovative principles of the present invention and the advantages thereof over the prior art, with the help of the attached drawings a possible embodiment applying such principles will be disclosed below. In the drawings:
- figure 1 is a perspective view of part of a link made using the method according to the invention,-
- figure 2 is a plan view of the link part of the preceding figure;
- figure 3 is a section view according to plane III-III shown in figure 2;
- figure 4 is a raised view of the link of the preceding figures; - figure 5 is a section view according to plane V-V shown in figure 4 with the stopping element in a non-operating position;
- figure 6 is a section view that is similar to the preceding one with the stopping element in the locked position of the connecting pivot.
With reference to the figures, in figure 1 there is shown part of a link 10 of a belt conveyor, of the type comprising a plurality of links interconnected in sequence by connecting pivots that are transverse to the movement direction of the belt. The belt can comprise several links placed alongside one another to obtain a desired conveyor width, for example with links staggered like bricks according to a known prior-art arrangement. The link 10 shown in the figures is an end link, arranged at a lateral end of the belt.
The link 10 comprises a body 11 in which are obtained two seats 14, 15 respectively for a front connecting pivot
(not shown) and a rear connecting pivot 16 connected to preceding and subsequent links of the belt. The body 11 has an elongated shape with a greater extent parallel to that of the connecting pivots between the links.
The seats 14, 15 consist of a series of aligned holes obtained in a plurality of protrusions respectively 12 and 13 for receiving transverse pivots. In the figures there are shown only the last two protrusions 12 and 13 near an end of the link. According to well-known teachings of the prior art, when the belt is mounted, the protrusions 12, 13 alternate along the extent of the pivots with corresponding protrusions of the adjacent links. In the body 11 there is formed a cavity 19 at an end of the seat 14 of the connecting pivot at an end 17 of the link 10 intended for forming a lateral side of the conveyor belt. Inside the cavity 19 there is housed a stopping element 18, which is movable between a non-operating position in which the pivot can be inserted into or removed from the seat 14 (clearly shown in figures 1, 2, 5) and an operating position in which the pivot is locked in the seat (see figure 6) . Both the stopping element and the body of the link can be made with known plastics used in the field, for example acetylene or polypropylene .
According to the invention, the stopping element 18 is overforged inside the cavity 19. Initially, the body 11 is forged by using a die provided with suitable drawers that form the cavity 19 with two openings on two faces of the body 11, advantageously on the lower face 30 and on the side face 31, that are orthogonal to one another. Once the body 11 is formed, the stopping element 18 is overforged on the piece forged in the die, the configuration of the drawers in the cavity 19 being suitably changed to create a cavity for overforging the element 18 to be formed movably between the two positions of figures 5-6. The arrangement of the drawers of the dies is not disclosed in detail here and can be achieved in any manner that is easily imaginable by those skilled in the art.
The element 18 is overforged so as to remain trapped in the cavity 19. The plasties of the two pieces (body of the link and stopping element) can be different from one another. In particular, the piece 18 can be made of different material so as to have greater withdrawal than that of the body 19, so as to ensure the necessary mobility of the stopping element between the two positions thereof after the stopping element has been overforged.
Advantageously, as well shown in figures 1 and 3, the stopping element has surfaces that are flush with the openings of the cavity 19 on the faces 30 and 31 of the body 11. This enables the external surfaces of the link 10 to be made satisfactorily continuous, improving in particular the sliding of the link with respect to the guides of the conveyor . Advantageously, the locking element is snappably movable between the operating position and the non-operating position. The element 18 in fact has a protrusion 21 that is alternatively suitable for snappably engaging in the recesses 32 (non-operating position of figures 1, 2 and 5) and 20 (operating position of figure 6) obtained on the side of the cavity 19 facing the centre of the link 10. On the face of the stopping element 18 facing the exterior of the link a notch 22 can be advantageously provided for facilitating moving the stop between the two positions thereof, for example by using a tool such as a screwdriver. In the example shown in the figures, as said, the link 10 is a lateral link of the belt, which link is intended to be placed alongside other similar links. On the opposite lateral side of the belt (not shown in the figure) there may be provided a link with a receiving seat for the blind pivot, so that the latter remains fixed in the belt and cannot move laterally thereto when the stopping element 18 is in the locked position. Alternatively, there may be another link made according to the invention.
At this point it is clear how the objects of the present invention have been achieved.
In particular, a method has been provided for manufacturing links for conveyors, which links are provided with stopping elements of the connecting pivot in which the surfaces of the link are more continuous than prior-art links are. This enables the guiding surfaces of the belt to be improved. Further, the stopping element is imprisoned inside the body of the link, preventing it being able to be removed accidentally from the link.
Naturally, the above description of an embodiment applying the innovative principles of the present invention is given only by way of example of such innovative principles and must not therefore be taken to limit the scope of what is claimed herein.
The stopping element and the respective seat could be shaped in a different manner from what was disclosed above to provide a movement of the stopping element that is different from a rectilinear movement, for example, the stop could be rotatable to be moved between the locked operating position of the pivot and the non-operating position for inserting/removing the pivot.

Claims

1. Method for manufacturing links of a conveyor of the type comprising a plurality of links interconnected in sequence by transverse connecting pivots that are transverse to the conveying direction, comprising the steps of: - forging a body of the link (11) provided with a receiving seat (14) of a connecting pivot and of a cavity (19) arranged at an end of said seat, - overforging inside said cavity (19) of the body (11) of the link a stopping element (18) so that it is imprisoned inside the cavity (19) and is movable between a locked operating position of the pivot in the seat and a non-operating position in which the pivot can be removed from the seat.
2. Method according to claim 1, in which the cavity (19) in the body of the link (11) is forged with two openings on two faces (30, 31) of the body of the link that are orthogonal to one another.
3. Method according to claim 2, in which the two openings are obtained respectively on a side face (31) of the body of the link and on a lower face (30) thereof.
4. Method according to claim 2, in which the stopping element is overforged with walls flush with the faces (30, 31) of the body of the link at the openings of the cavity (19) .
5. Method according to claim 1, in which the cavity (19) in the body and the stopping element (18) are overforged so that the stopping element (18) is snappably slidable inside the cavity (19) between the two operating and non-operating positions .
6. Link for conveyor suitable for being interconnected in sequence with adjacent links by connecting pivots that are transverse to the conveying direction, the link comprising a body (11) provided with a cavity (19) positioned at an end of a receiving seat (14) of a connecting pivot (16) , said cavity (19) containing a stopping element (18) movable in the cavity between a locked operating position of the pivot (16) in the seat (14) thereof and a non-operating position in which the pivot is removable from the seat, characterized in that the locking element (18) is overforged in the cavity (19) of the body of the link.
7. Link according to claim 6, characterized in that the cavity (19) has two openings on two faces (30, 31) of the body (11) that are orthogonal to one another.
8. Link according to claim 7, characterized in that said two openings are on a side face (31) and on a lower face (30) of the body of the link.
9. Link according to claim 7, characterized in that said stopping element (18) has walls flush with the two faces (30, 31) of the body of the link at the openings of the cavity (19) .
10. Link according to claim 6, characterized in that the locking element (18) is snappably movable between the two positions inside the cavity.
11. Link according to claim 6, characterized in that it comprises a plurality of front and rear hinging protrusions (12, 13) for forming respective seats (14, 15) for the pivots connecting with the subsequent and preceding link.
12. Belt conveyor comprising a plurality of links interconnected in sequence by connecting pivots that are transverse to the conveying direction, comprising links as per claims 6 to 11 at a lateral side thereof.
PCT/IB2008/002655 2007-10-08 2008-10-03 Method for manufacturing links of a conveyor and links of a conveyor obtained with this method WO2009047616A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2007A001941 2007-10-08
IT001941A ITMI20071941A1 (en) 2007-10-08 2007-10-08 "METHOD FOR THE MANUFACTURE OF JERSEYS OF A CONVEYOR AND JERSEYS OF A CONVEYOR OBTAINED WITH THIS METHOD"

Publications (2)

Publication Number Publication Date
WO2009047616A1 true WO2009047616A1 (en) 2009-04-16
WO2009047616A9 WO2009047616A9 (en) 2009-07-09

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PCT/IB2008/002655 WO2009047616A1 (en) 2007-10-08 2008-10-03 Method for manufacturing links of a conveyor and links of a conveyor obtained with this method

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AR (1) AR068836A1 (en)
IT (1) ITMI20071941A1 (en)
WO (1) WO2009047616A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324737A (en) * 1963-11-18 1967-06-13 Eugene W Onulak Link chain
US5217110A (en) * 1992-04-23 1993-06-08 Cambridge Wire Cloth Company Modular plastic turn belt conveyor system, module, belt and drive therefor
EP0827921A1 (en) * 1996-09-05 1998-03-11 The Laitram Corporation Shuttle plugs for retaining headless pivot rods in conveyor belts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324737A (en) * 1963-11-18 1967-06-13 Eugene W Onulak Link chain
US5217110A (en) * 1992-04-23 1993-06-08 Cambridge Wire Cloth Company Modular plastic turn belt conveyor system, module, belt and drive therefor
EP0827921A1 (en) * 1996-09-05 1998-03-11 The Laitram Corporation Shuttle plugs for retaining headless pivot rods in conveyor belts

Also Published As

Publication number Publication date
AR068836A1 (en) 2009-12-09
WO2009047616A9 (en) 2009-07-09
ITMI20071941A1 (en) 2009-04-09

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