NZ247117A

NZ247117A - Chain conveyor with adjacent chains having connecting conveyor flights which are articulated to vary conveyor width

Info

Publication number: NZ247117A
Application number: NZ24711793A
Authority: NZ
Inventors: Kauko Rautio
Original assignee: Kauko Rautio
Priority date: 1993-03-10
Filing date: 1993-03-10
Publication date: 1995-08-28

Description

24 7 1 17 Priority Oate(a): Cwniplsw Specification Filed: (9". X*. ^2^ Cfass: iM* Publication Date: .. .2.8. .AW? .19?$ P.O. Journal, No: ..

Patents Form No. 5 NEW ZEALAND PATENTS ACT 1953 COMPLETE SPECIFICATION c r . / * /,"V CHAIN CONVEYOR 1^:1 OMAR 1991S ! I, KAUKO RAUTIO, a Finnish citizen of Kyttalare^^jl^^ ' SF-52700 Mantyharju, FINLAND hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statements (followed by page la) Chain conveyor 2471 The present invention relates to a chain conveyor, for example, for conveying sawn wood after the sawing machine, the chain conveyor being made up of at least two adjacent conveyor chains on top of which the conveyor flights supporting the sawn wood are located.

In prior known devices, the conveyor flights supporting sawn wood are various flat steel bars having a length equal to twice the width of a chain and being fixedly installed transversely on top of the chain so that they extend beyond the chain by as much as twice the width of the chain. When the chains are positioned adjacently, half of a flat steel bar is on top of the adjacent chain. This is a simple structure, but the maximum width of the conveyor when extended is only twice the minimum width as the extendable width is limited by the length of the flat steel bars.

Using a conveyor wider that a bundle of sawn wood, from which conveyor the boards are transferred by means of blades or guides to board conveyors on the sides of the conveyor, sufficient board-ejection force cannot be achieved. A subsequent board must push the preceding one, and thus they will fall irregularly onto the side conveyors. The boards will wedge against each other, especially if they are waney. The object of the invention i£. to;---^ • ' 0" \ mitigate the disadvantages described above and to provide a new-type chain conveyor with a regulatable width or to at least provide the public with a useful choice. The chad.fi "'v' 35 conveyor according to the invention is characterized in.? that the conveyor flight is articulated in such a manner tha>?=fc width of the entire chain conveyor can always be adjusted to sufficient width by adjusting the distance between the coavsy«£ chains. The system according to the invention separates surface boards from the center yield by dropping them to outside the conveyor while the center yield will continue forward. The boards are supported by pressure against the center yield by the driving wheels until they are entirely outside the sawing machine. (followed by page 2) One embodiment of the invention is characterised in that the conveyor flight is articulated at its center in such a manner that it forms a V-angle which is obtuse when the chain conveyor is in a wide position and acute when the chain conveyor is in a narrow position, and that the width of the chain conveyor can thus be regulated steplessly.

Another embodiment of the invention is characterized in that the conveyor chains run in chain guides by which the conveyor width can be regulated. Between the conveyor chains there is further a guide rail or chain supporting the conveyor flights.

A chain conveyor such as this is simple; it is economical to manufacture and reliable in operation.

The invention is described below with the help of an example, with reference to the accompanying drawing, in which Figures 1, 2 and 3 depict end, top and side views of a section of the conveyor chain in a wide position, Figures 4, 5 and 6 depict the same chain conveyor, but in a narrow position, Figures 7 and 8 depict top views of alternative conveyor flights, in which they are, according to Figure 7, a chain 5 and, according to Figure 8, a belt 6 or a spring steel strip.

The chain conveyor is made up of two adjacent conveyor chains 1, on top of which the conveyor flights 2 conveying sawn wood are located. The conveyor flight 2 is articulated in such a manner that the width of the entire chain conveyor can be regulated by adjusting the distance between the conveyor chains. The conveyor chain 2 is articulated at its center in such a manner that it forms a V-angle which is obtuse when the chain conveyor is in a wide position, Figures 1-3. The V-angle is acute when the chain conveyor is in a narrow position, Figures 4-6. The width of the chain conveyor can thus be adjusted step-lessly. The conveyor•chains 1 run in chain guides 3, by which the conveyor width can be adjusted. Between the conveyor chains 1 there is a guide rail 4 which supports the conveyor flights 2. Since the motor, power transmission, and width-regulating devices belonging to the chain conveyor are systems and applications known per se, these devices are not described in the present patent application.

Claims

24711 4 WHAT l/WC CLAIM IS:-

1. A chain conveyor, for example for conveying sawn wood from a sawing machine, the chain conveyor including at least two adjacent conveyor chains having conveyor flights located thereon for supporting sawn wood, wherein each conveyor flight is articulated in such a manner that the width of the entire chain conveyor can be adjusted by adjusting the distance between the conveyor chains

2. A chain conveyor according to Claim 1, wherein each conveyor flight is articulated at its center in such a manner that it forms a V-angle which is obtuse when the chain conveyor is in a wide position and acute when the chain conveyor is in a narrow position, and that the chain conveyor width can thus be continuously adjusted.

3. A chain conveyor according to Claim 1 or 2, wherein the conveyor chains run in chain guides by which the width of the conveyor can be adjusted.

4. A chain conveyor according to any of the above claims, wherein between the conveyor chains there is provided a guide rail or a chain supporting the conveyor flights.

5. A chain conveyor, substantially as herein described with reference to and as illustrated in figures 1 to 6, 7 or 8 of the accompanying drawings. KAUKOftAUTIO Attorneys SON & CAREY