CA2153917A1 - Device for piecemeal cross feeding of elongated elements - Google Patents
Device for piecemeal cross feeding of elongated elementsInfo
- Publication number
- CA2153917A1 CA2153917A1 CA002153917A CA2153917A CA2153917A1 CA 2153917 A1 CA2153917 A1 CA 2153917A1 CA 002153917 A CA002153917 A CA 002153917A CA 2153917 A CA2153917 A CA 2153917A CA 2153917 A1 CA2153917 A1 CA 2153917A1
- Authority
- CA
- Canada
- Prior art keywords
- arrangement
- movement path
- arrangements
- elements
- along
- 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.)
- Abandoned
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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
- B65G25/00—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
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- 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
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
- B65G2201/0214—Articles of special size, shape or weigh
- B65G2201/0217—Elongated
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reciprocating Conveyors (AREA)
Abstract
A device for piecemeal cross feeding of elongated elements comprises two arrangements (1, 2) provided with steps (3, 4) and intended for engagement with the elements. These arrangements are movable reciprocatingly along a movement path (8) to gradually move elements alternately resting thereon forward. The movement path (8) is curved like an arch. The device also comprises an arrangement (9) for moving the step arrangements (1, 2) in an angle to the movement path (8) to make the step arrangements projected and retracted respectively in an angle to the movement path (8) and with a phase displacement of 180°.
Description
~ ~21 539 t7 of/ij Applicant: INTERLOG AB
s A device fof piecemeal cross feeding of elon~ated elements FIELD OF THE INVENTION AND PRIOR ART
In a broad sense this invention is related to a device for piecemeal cross feeding of elongated elements. The elements in question are preferably timber pieces. Thereby, it is particularly a question of boards, that is timber pieces having a non-circular cross section, 15 normally a rectangular one. The invention particularly relates to a device such as the one related to in the preamble of the following independent patent claims.
Prior art within this field appears from our Swedish published docu-20 ments Nos. 449 476 and 468 675. These-known devices have proved themselves to be very advantageous and have led to great commercial success.
The devices according to the published documents are particularly ad-25 vantageous for use with pieces of round timber.
It has been problematic to use the devices according to the published documents in connection with elongated elements with other shapes than principally round. These problems are shown in difficulties of ob-30 taining a secure single piece feeding function with a reasonable capa-city.
THE OBJECT OF THE INVENTION
35 The object of the present invention is to develop prior art within this field to make the device according to the invention obtain an improved precision as to single piece feeding and/or feeding capacity.
CA~15~9 17 SUMMARY OF THE INVENTION
According to the invention the stated object is obtained through the 5 different constructional features defined in the following patent claims.
The solution defined in claim 1 implies that at least one of the step ar-rangements is given a mobility in an angle to the movement path, something that creates prerequisites for effectively catching the 10 elongated elements on the step arrangement in question that next will move forwards along the movement path.
A movement path curved as an arch in accordance with what is defined in claim 2 implies the important advantage of a varying 15 inclination along the length of the path. Thereby it is particularly advantageous that the inclination becomes steeper the higher the elements reach on the movement path. From this follows that the inclination becomes relatively small in the bottom region of the step arrangements where the elongated elements are supposed to be 20 brought onto or taken up onto the step arrangements.
The design defined in claim 3 with both the step arrangements movably arranged along the moving path creates a requisite for a significantly elevated feeding capacity of the device.
Further preferred embodiments of the invention ~ill be defined in the dependent patent claims.
BRIEF DESCRIPTION OF THE DRAWINGS
With reference to the appended drawings, a more specific description of embodiments of the invention referred to by way of example will follow hereinafter.
35 In the drawing:
Fig 1 is a schematic side view of the device according to the invention, - ~21 53917 Fig 2 is a side view illustrating one of two step arrangements included in the device, as seen in a side view, 5 Fig 3 is a schematic view from above of the step arrangement accord-ing to Fig 2, Fig 4 is a side view of the other step arrangement included in the device, in a side view, Fig 5 is a view from above of the device according to Fig 4, Fig 6 is a side view of a guide belonging to the step arrangement according to Figs 2 and 3, Fig 7 is a similar side view of a guide belonging to the step arrange-ment according to Figs 4 and 5, Fig 8 is a cross section through the guides according to Figs 6 and 7, Fig 9 is, on top, a view similar to the one of Fig 1 and, at the bottom, a view from above in a simplified version of the device shown at the top of Fig 9 with certain details omitted, 25 Fig 10 are schematic views at the top and bottom respectively, from the side and above respectively, illustrating a driving arrangement for bringing the step arrangement into motion along the movement path, Fig 11 is a schematic view from the side, illustrating a device for 30 moving the step arrangements with an angle to the movement path, Fig 12 are views illustrating members included in the moving arrange-ment, and 35 Figs 13-19 are schematic side views illustrating the function of the device according to the invention.
s A device fof piecemeal cross feeding of elon~ated elements FIELD OF THE INVENTION AND PRIOR ART
In a broad sense this invention is related to a device for piecemeal cross feeding of elongated elements. The elements in question are preferably timber pieces. Thereby, it is particularly a question of boards, that is timber pieces having a non-circular cross section, 15 normally a rectangular one. The invention particularly relates to a device such as the one related to in the preamble of the following independent patent claims.
Prior art within this field appears from our Swedish published docu-20 ments Nos. 449 476 and 468 675. These-known devices have proved themselves to be very advantageous and have led to great commercial success.
The devices according to the published documents are particularly ad-25 vantageous for use with pieces of round timber.
It has been problematic to use the devices according to the published documents in connection with elongated elements with other shapes than principally round. These problems are shown in difficulties of ob-30 taining a secure single piece feeding function with a reasonable capa-city.
THE OBJECT OF THE INVENTION
35 The object of the present invention is to develop prior art within this field to make the device according to the invention obtain an improved precision as to single piece feeding and/or feeding capacity.
CA~15~9 17 SUMMARY OF THE INVENTION
According to the invention the stated object is obtained through the 5 different constructional features defined in the following patent claims.
The solution defined in claim 1 implies that at least one of the step ar-rangements is given a mobility in an angle to the movement path, something that creates prerequisites for effectively catching the 10 elongated elements on the step arrangement in question that next will move forwards along the movement path.
A movement path curved as an arch in accordance with what is defined in claim 2 implies the important advantage of a varying 15 inclination along the length of the path. Thereby it is particularly advantageous that the inclination becomes steeper the higher the elements reach on the movement path. From this follows that the inclination becomes relatively small in the bottom region of the step arrangements where the elongated elements are supposed to be 20 brought onto or taken up onto the step arrangements.
The design defined in claim 3 with both the step arrangements movably arranged along the moving path creates a requisite for a significantly elevated feeding capacity of the device.
Further preferred embodiments of the invention ~ill be defined in the dependent patent claims.
BRIEF DESCRIPTION OF THE DRAWINGS
With reference to the appended drawings, a more specific description of embodiments of the invention referred to by way of example will follow hereinafter.
35 In the drawing:
Fig 1 is a schematic side view of the device according to the invention, - ~21 53917 Fig 2 is a side view illustrating one of two step arrangements included in the device, as seen in a side view, 5 Fig 3 is a schematic view from above of the step arrangement accord-ing to Fig 2, Fig 4 is a side view of the other step arrangement included in the device, in a side view, Fig 5 is a view from above of the device according to Fig 4, Fig 6 is a side view of a guide belonging to the step arrangement according to Figs 2 and 3, Fig 7 is a similar side view of a guide belonging to the step arrange-ment according to Figs 4 and 5, Fig 8 is a cross section through the guides according to Figs 6 and 7, Fig 9 is, on top, a view similar to the one of Fig 1 and, at the bottom, a view from above in a simplified version of the device shown at the top of Fig 9 with certain details omitted, 25 Fig 10 are schematic views at the top and bottom respectively, from the side and above respectively, illustrating a driving arrangement for bringing the step arrangement into motion along the movement path, Fig 11 is a schematic view from the side, illustrating a device for 30 moving the step arrangements with an angle to the movement path, Fig 12 are views illustrating members included in the moving arrange-ment, and 35 Figs 13-19 are schematic side views illustrating the function of the device according to the invention.
2 1 ~3y l 7 DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
The device illustrated in Fig 1 is intended for piecemeal feeding of elongated elements. Though also other element may come in question 5 these elements are described hereinafter as consisting of boards.
The device comprises two arrangements 1, 2 provided with steps 3 and 4 respectively and intended for engagement with the boards. Each one of these arrangements comprises a plurality of these steps 3 and 10 4 respectively, which have generally the same shape as to profile, and each one of which presents an upwards sloping first portion 5 which at its highest point turns into a downwards sloping, second portion 6.
This one in its turn turns into another upwards sloping first portion 5.
15 A driving arrangement 7 (which will be described more in detail hereinafter by means of Fig 9) serves to set the step arrangements 1, 2 in motion reciprocatingly along a movement path indicated with 8 in Fig 1. Each one of the step arrangements 1, 2 is arranged to entrain boards received on the steps 3 and 4 respectively of this step ar-20 rangement during movement forwards along the movement path 8 (inthe direction of the full lined arrow point), and leave the boards on the steps of the other step arrangement during movement backwards along the movement path 8 (in the direction of the arrow point with broken lines). In the illustrated embodiment the movement path 8 is 25 curved like an arc.
Furthermore, the device comprises a device for moving the two step arrangements 1, 2 with an angle to the movement path 8 between a projected position in which the step arrangement in question is 30 supposed to carry the boards, and a retracted position in which said step arrangement is in a position where it is retracted inwardly of boards carried by the other step arrangement. In the position illus-trated in Fig 1 it is the step arrangement 1 which is located in the re-tracted position while the step arrangement 2 is located in the 35 projected position.
~1 539~7 In the embodiment here illustrated the movement path 8 slopes to form an inclination for the boards.
The stepped upper sides of the step arrangements 1, 2 are in principle 5 curved like arcs apart from the micro structure formed by the steps 3, 4. More precisely the arched curvature of the movement path 8 and the stepped upper sides of the step arrangements 1, 2 is generally similar.
Apart from the step structure the inclination of the stepped upper sides 10 of the step arrangements 1,2 increases in an upwards direction along the movement path. Also the inclination of the movement path 8 will, accordingly, increase in an upwards direction.
Each one of the step arrangements 1 and 2 respectively will move 15 generally perpendicularly to the movement path 8 as they move between their projected and retracted positions. One then leaves the movement of the step arrangements along the movement path 8 out of count. As the stepped upper sides of the step arrangements slope up-wards and, thus, form an inclination for the boards, the step arrange-20 ment in question will be projected obliquely outwards/upwards fromthe movement path 8 in its projected position and obliquely down-wards/inwards in its retracted position. It can, therefor, be expressed as if a step arrangement located in a projected position is in an elevated position while a step arrangement which is in a retracted po-25 sition is lowered.
The two step arrangements 1, 2 are driven in a phase displaced wayby means of the driving arrangement 7 to make one of the step arrangements move backwards (that is downwards) as the other step 30 arrangement moves forwards (that is upwards) along the movement path and inversely. Accordingly, the phase displacement is 180.
The moving arrangement 9 comprises members for moving the step arrangements 1, 2 with such a phase displacement that the first step 35 arrangement is projected as the other is retracted and inversely.
C 1~1 539 17 i~ (? I,7 The driving arrangement 7 and the moving arrangement 9 are co-ordi-nated one to another in such a way that as one of the step arrange-ments moves forwards it is simultaneously projected, while it is retracted when it moves back again. Thereby the moving arrangement 5 9 is arranged to move the step arrangements 1, 2 respectively be-tween their projected and retracted positions respectively as the step arrangements are located in the areas of their rear and front end positions respectively.
10 Before exemplifying the chosen constructional design of the device more closely the function of the device according to the invention will now be described on the basis of Figs 13-19. In Fig 13 the step arrangement 1 is illustrated in a front position along the movement path 8. The other step arrangement 2 is thereby located in its rear end 15 position. The step arrangement 2 is projected while the step arrange-ment is retracted. Hereinafter the expressions "elevated" and "lowered" respectively will be used instead of the expressions just mentioned.
20 A number of boards are schematically suggested with the letters A-F.
The board A is located at the upper end of the step arrangement 1 while the rest of the boards B-F are resting on steps on the other step arrangement 2. As shown in Fig 14, the next action is that the elevated step arrangement 2 moves forwards while, simultaneously, the 25 lowered step arrangement 1 moves backwards. The front end of the step arrangement 2 will hit the board A with a projection outside an adjacent portion of the step arrangement 1 and push said board in front of itself and past the end of the step arrangement 1 to make the board A leave the device. Thereby the board may be caught by means 30 of a suitable conveyer or any other optional equipment. In Fig 14 the step arrangements 1 and 2 are still lowered and elevated respectively as seen in the crosswise direction to the movement path 8, and they are in their middle positions as seen along the movement path 8. In Fig 15 the step arrangement 2 has reached its foremost position along 35 the path 8 while the step arrangement 1 has reached its rearmost po-sition. In these positions the movement is turned around to make the step arrangement 2 start moving backwards while the step arrange-~,A2153917 ment 1 starts moving forwards. In connection hereto the step arrange-ment 1 is lowered across the movement path 8 while the step ar-rangement 2 is elevated. The length of the steps 3, 4 of the step arrangements and the movement length along the movement path 8 as 5 to the step arrangements 1, 2 then implies that, as illustrated in Fig 16, the step arrangement 2 will take over the carrying of the boards C-F
while the foremost board B will still be carried by the step arrangement 1.
10 In Fig 17 it is illustrated how the step arrangement 2 after some forward movement along the movement path 8 in connection to a certain motion backwards by the step arrangement 1 along this path will push the board B off from the step arrangement 1. In Fig 18 the step arrangement 2 is in its foremost and uppermost position while the 15 step arrangement 1 is in its rearmost and lowest position. In Fig 19 it is illustrated how the step arrangement 2 has been lowered while the step arrangement 1 has been elevated to a corresponding degree, the step arrangement 1 having overtaken the carrying of the boards D-F
while the board C stays on the step arrangement 2. At the next 20 reversal of the movement direction the step arrangement 1 will move forwards while the step arrangement 2 moves backwards, and this leads to the board C being pushed off from the step arrangement 2.
As can be seen from Figs 2 and 3 the step arrangement 1 presents a 25 plurality, more precisely five, of step sections 10 which are arranged in a relationship side by side with spacings inbetween. These sections 10 are held together by means of beams 11 running crosswise. At the ends of these beams 1 1 mounting plates 12 are arranged. These serve to hold such guides that are illustrated at 13 in Fig 6. It should hereby 30 be understood that the guides at opposite gables of the device will be reversed in relation to each other. One of these guides is suggested in Fig 1 at 13. It has a U-shaped cross section as illustrated in Fig 8 and receives runner members 14, here in the form of rolls, between its flanges. As will be more closely described hereinafter, these rolls are 35 brought onto a frame 15 of the device. As the step arrangement 1 moves along the movement path 8 the guide 13, screwed tight into the mounting plates 12 already mentioned, follows and the guide 13 will ~A ~1 53~ ~ 7 thereby be guided by the runner members 14 to describe its arched movement path 8. The same goes with the second step arrangement 2 in Figs 4 and 5. Also this one presents a plurality of step sections 16 which are arranged side by side and separated from each other, and 5 which are connected to each other by means of beams 17. Mounting plates 18 at the ends of these beams serve to hold guides 19 of the sort which is seen in Fig 7. Also these guides have a U-shaped cross section according to Fig 8.
10 In Fig 1 it can be seen how one of the guides 19 receives runner members 20 in the shape of rolls between its flanges. Also these runner members 20 are fixed in relation to the framework 15 of the device. As the step arrangement 2 is moving, the guide 19 follows and the motion is, accordingly, defined by means of the runner members 15 20 to conform with the movement path 8.
In Fig 9 there is illustrated at the bottom, in a view from above, how the step sections 10, 16 of the step arrangements 1, 2 alternately will be placed side by side between each other to make a certain step 20 section of one of the step arrangements become located as projected between two step sections belonging to the other step arrangement.
In Fig 10 there is illustrated an example of a possible driving arrange-ment 7 for the movement of the step arrangements 1, 2 along the 25 movement path 8. More precisely, the driving arrangement 7 may comprise a crank shaft 21 which is rotatably mounted in the framework 15. At the ends thereof, this crank shaft presents crank pins 22 and 23 respectively. Around these crank pins one of the ends of stays 24 and 25 respectively are mounted. In the example the stays 24 are thought 30 to be connected to the step arrangement 1 schematically illustrated in the upper part of Fig 10, while the stays 25 are thought to be con-nected to the step arrangement 2. The crank pins 22 and 23 respec-tively are peripherally separated with 180 from each other, which means that, as the crank shaft 21 rotates, the step arrangements 1 and 35 2 will be driven in opposite directions, that is phase displaced with 180. The stays 24, 25 are connected to the step arrangements 1, 2 in an articulated way to make co-ordination accordingly exist with the ~A2 15391 7 guides 13, 19 and the runner members 14, 20 which define the movement paths of the step arrangements 1, 2. The crank shaft 21 is rotated by means of driving power obtained from a suitable power source.
On the basis of Figs 1 and 11-12 it will now be described how the step arrangements 1, 2 are movable in an angle to the movement path 8. In the example it is illustrated how the moving arrangement is thought to include the abovementioned runner members 14, 20. More precisely, it 10 is illustrated to the right in Fig 12 how the running members 14, 20 are rotatably mounted on a lever arm 26 which in its turn is turnably mounted at the framework 15 of the device around a point indicated with 27 in Figs 1 and 11. This mounting point is formed by means of a bearing pin 28 which can be seen to the right in Fig 12. The lever arm 15 26 is arranged to be turned by means of a power member 29, e.g. of a type with variable length, which can be connected to the lever arm 26 in an articulated way, for example around the pin 30 illustrated to the right in Fig 12. A stay 31 illustrated at the bottom of Fig 12 is sup-posed to be connected to the lever arm 26 in an articulated way at the 20 indicated point 32 and to a second lever-arm 33 at a point 34. This lever arm 33 is turnably mounted at the framework 15 of the device at the point indicated with 35 in Fig 11, said point being materialized by means of a turning pin 36. The other lever arm 33 presents bearing pins 37 on which the other runner rolls 14, 20 which are seen at the 25 top of Fig 11 are rotatably mounted.
It will be realized that such moving members that have been described on the basis of Figs 11 and 12 are also present at the far end of the device in Fig 1.
As the lever arms 26, 33 carrying the runner members 14, 20 are pre-sent in the positions according to Fig 1 the guides 13, 19 are sepa-rated at their maximum from each other. This means that the step ar-rangement 1 is retracted/lowered at maximum while the step arrange-35 ment 2 is projected/elevated at its maximum. When now, however, thelever arms 26 and 33 and thereby the runner members 14, 20 are moved to their positions indicated in Fig 11 through contraction of the C ~21 53~17 power member 29, connecting lines between the centres of the runner members 14, 20 will extend obliquely in relation to the longitudinal centre lines of the guides 13, 19, which will mean that the guides are forced together. This leads to the step arrangement 1 being pro-5 jected/elevated according to Fig 1 while the step arrangement 2 is si-multaneously retracted/lowered. These movements of the step ar-rangements 1, 2 in a direction with an angle to the movement path 8 has, however, no effect on the movements of the step arrangements along the movement path 8 because of the free movement of the 10 runner members 14, 20 along the guides. Instead it is only the crank-like driving arrangement 7 according to Fig 10 which defines the positions of the step arrangements 1, 2 along the movement path 8.
During use of the device according to the invention boards are sup-15 plied to the region of the lower parts of the step arrangements 1, 2, forinstance by means of a conveyer 38 indicated in Fig 1. Boards will thus be in such a position that they can be caught one at a time by the step arrangement which for the moment is in its rear end position. The boards are then successively conveyed further up the step arrange-20 ments in the way explained on basis of Fig~ 13-19.
Of course the device just described can be modified in a plurality of ways within the scope of the invention. In certain embodiments of the device it would for example be possible to make one of the step 25 arrangements stationary while only one of the step arrangements would be movable. In another embodiment it would be possible to make one of the step arrangements movable along the movement path 8 while the other step arrangement would be immovable along the movement path 8 but would be able to move with an angle thereto 30 instead to obtain a requested feeding function. Finally, it is pointed out that it would possibly be useful to construct the device in such a way that the movement path 8 for the step arrangements 1 and 2 would be generally horizontal, possibly rectilinear, in which case the step provided upper sides of the step arrangements 1, 2 would suitably also 35 be constructed as generally rectilinear and horizontal apart from the step structure.
The device illustrated in Fig 1 is intended for piecemeal feeding of elongated elements. Though also other element may come in question 5 these elements are described hereinafter as consisting of boards.
The device comprises two arrangements 1, 2 provided with steps 3 and 4 respectively and intended for engagement with the boards. Each one of these arrangements comprises a plurality of these steps 3 and 10 4 respectively, which have generally the same shape as to profile, and each one of which presents an upwards sloping first portion 5 which at its highest point turns into a downwards sloping, second portion 6.
This one in its turn turns into another upwards sloping first portion 5.
15 A driving arrangement 7 (which will be described more in detail hereinafter by means of Fig 9) serves to set the step arrangements 1, 2 in motion reciprocatingly along a movement path indicated with 8 in Fig 1. Each one of the step arrangements 1, 2 is arranged to entrain boards received on the steps 3 and 4 respectively of this step ar-20 rangement during movement forwards along the movement path 8 (inthe direction of the full lined arrow point), and leave the boards on the steps of the other step arrangement during movement backwards along the movement path 8 (in the direction of the arrow point with broken lines). In the illustrated embodiment the movement path 8 is 25 curved like an arc.
Furthermore, the device comprises a device for moving the two step arrangements 1, 2 with an angle to the movement path 8 between a projected position in which the step arrangement in question is 30 supposed to carry the boards, and a retracted position in which said step arrangement is in a position where it is retracted inwardly of boards carried by the other step arrangement. In the position illus-trated in Fig 1 it is the step arrangement 1 which is located in the re-tracted position while the step arrangement 2 is located in the 35 projected position.
~1 539~7 In the embodiment here illustrated the movement path 8 slopes to form an inclination for the boards.
The stepped upper sides of the step arrangements 1, 2 are in principle 5 curved like arcs apart from the micro structure formed by the steps 3, 4. More precisely the arched curvature of the movement path 8 and the stepped upper sides of the step arrangements 1, 2 is generally similar.
Apart from the step structure the inclination of the stepped upper sides 10 of the step arrangements 1,2 increases in an upwards direction along the movement path. Also the inclination of the movement path 8 will, accordingly, increase in an upwards direction.
Each one of the step arrangements 1 and 2 respectively will move 15 generally perpendicularly to the movement path 8 as they move between their projected and retracted positions. One then leaves the movement of the step arrangements along the movement path 8 out of count. As the stepped upper sides of the step arrangements slope up-wards and, thus, form an inclination for the boards, the step arrange-20 ment in question will be projected obliquely outwards/upwards fromthe movement path 8 in its projected position and obliquely down-wards/inwards in its retracted position. It can, therefor, be expressed as if a step arrangement located in a projected position is in an elevated position while a step arrangement which is in a retracted po-25 sition is lowered.
The two step arrangements 1, 2 are driven in a phase displaced wayby means of the driving arrangement 7 to make one of the step arrangements move backwards (that is downwards) as the other step 30 arrangement moves forwards (that is upwards) along the movement path and inversely. Accordingly, the phase displacement is 180.
The moving arrangement 9 comprises members for moving the step arrangements 1, 2 with such a phase displacement that the first step 35 arrangement is projected as the other is retracted and inversely.
C 1~1 539 17 i~ (? I,7 The driving arrangement 7 and the moving arrangement 9 are co-ordi-nated one to another in such a way that as one of the step arrange-ments moves forwards it is simultaneously projected, while it is retracted when it moves back again. Thereby the moving arrangement 5 9 is arranged to move the step arrangements 1, 2 respectively be-tween their projected and retracted positions respectively as the step arrangements are located in the areas of their rear and front end positions respectively.
10 Before exemplifying the chosen constructional design of the device more closely the function of the device according to the invention will now be described on the basis of Figs 13-19. In Fig 13 the step arrangement 1 is illustrated in a front position along the movement path 8. The other step arrangement 2 is thereby located in its rear end 15 position. The step arrangement 2 is projected while the step arrange-ment is retracted. Hereinafter the expressions "elevated" and "lowered" respectively will be used instead of the expressions just mentioned.
20 A number of boards are schematically suggested with the letters A-F.
The board A is located at the upper end of the step arrangement 1 while the rest of the boards B-F are resting on steps on the other step arrangement 2. As shown in Fig 14, the next action is that the elevated step arrangement 2 moves forwards while, simultaneously, the 25 lowered step arrangement 1 moves backwards. The front end of the step arrangement 2 will hit the board A with a projection outside an adjacent portion of the step arrangement 1 and push said board in front of itself and past the end of the step arrangement 1 to make the board A leave the device. Thereby the board may be caught by means 30 of a suitable conveyer or any other optional equipment. In Fig 14 the step arrangements 1 and 2 are still lowered and elevated respectively as seen in the crosswise direction to the movement path 8, and they are in their middle positions as seen along the movement path 8. In Fig 15 the step arrangement 2 has reached its foremost position along 35 the path 8 while the step arrangement 1 has reached its rearmost po-sition. In these positions the movement is turned around to make the step arrangement 2 start moving backwards while the step arrange-~,A2153917 ment 1 starts moving forwards. In connection hereto the step arrange-ment 1 is lowered across the movement path 8 while the step ar-rangement 2 is elevated. The length of the steps 3, 4 of the step arrangements and the movement length along the movement path 8 as 5 to the step arrangements 1, 2 then implies that, as illustrated in Fig 16, the step arrangement 2 will take over the carrying of the boards C-F
while the foremost board B will still be carried by the step arrangement 1.
10 In Fig 17 it is illustrated how the step arrangement 2 after some forward movement along the movement path 8 in connection to a certain motion backwards by the step arrangement 1 along this path will push the board B off from the step arrangement 1. In Fig 18 the step arrangement 2 is in its foremost and uppermost position while the 15 step arrangement 1 is in its rearmost and lowest position. In Fig 19 it is illustrated how the step arrangement 2 has been lowered while the step arrangement 1 has been elevated to a corresponding degree, the step arrangement 1 having overtaken the carrying of the boards D-F
while the board C stays on the step arrangement 2. At the next 20 reversal of the movement direction the step arrangement 1 will move forwards while the step arrangement 2 moves backwards, and this leads to the board C being pushed off from the step arrangement 2.
As can be seen from Figs 2 and 3 the step arrangement 1 presents a 25 plurality, more precisely five, of step sections 10 which are arranged in a relationship side by side with spacings inbetween. These sections 10 are held together by means of beams 11 running crosswise. At the ends of these beams 1 1 mounting plates 12 are arranged. These serve to hold such guides that are illustrated at 13 in Fig 6. It should hereby 30 be understood that the guides at opposite gables of the device will be reversed in relation to each other. One of these guides is suggested in Fig 1 at 13. It has a U-shaped cross section as illustrated in Fig 8 and receives runner members 14, here in the form of rolls, between its flanges. As will be more closely described hereinafter, these rolls are 35 brought onto a frame 15 of the device. As the step arrangement 1 moves along the movement path 8 the guide 13, screwed tight into the mounting plates 12 already mentioned, follows and the guide 13 will ~A ~1 53~ ~ 7 thereby be guided by the runner members 14 to describe its arched movement path 8. The same goes with the second step arrangement 2 in Figs 4 and 5. Also this one presents a plurality of step sections 16 which are arranged side by side and separated from each other, and 5 which are connected to each other by means of beams 17. Mounting plates 18 at the ends of these beams serve to hold guides 19 of the sort which is seen in Fig 7. Also these guides have a U-shaped cross section according to Fig 8.
10 In Fig 1 it can be seen how one of the guides 19 receives runner members 20 in the shape of rolls between its flanges. Also these runner members 20 are fixed in relation to the framework 15 of the device. As the step arrangement 2 is moving, the guide 19 follows and the motion is, accordingly, defined by means of the runner members 15 20 to conform with the movement path 8.
In Fig 9 there is illustrated at the bottom, in a view from above, how the step sections 10, 16 of the step arrangements 1, 2 alternately will be placed side by side between each other to make a certain step 20 section of one of the step arrangements become located as projected between two step sections belonging to the other step arrangement.
In Fig 10 there is illustrated an example of a possible driving arrange-ment 7 for the movement of the step arrangements 1, 2 along the 25 movement path 8. More precisely, the driving arrangement 7 may comprise a crank shaft 21 which is rotatably mounted in the framework 15. At the ends thereof, this crank shaft presents crank pins 22 and 23 respectively. Around these crank pins one of the ends of stays 24 and 25 respectively are mounted. In the example the stays 24 are thought 30 to be connected to the step arrangement 1 schematically illustrated in the upper part of Fig 10, while the stays 25 are thought to be con-nected to the step arrangement 2. The crank pins 22 and 23 respec-tively are peripherally separated with 180 from each other, which means that, as the crank shaft 21 rotates, the step arrangements 1 and 35 2 will be driven in opposite directions, that is phase displaced with 180. The stays 24, 25 are connected to the step arrangements 1, 2 in an articulated way to make co-ordination accordingly exist with the ~A2 15391 7 guides 13, 19 and the runner members 14, 20 which define the movement paths of the step arrangements 1, 2. The crank shaft 21 is rotated by means of driving power obtained from a suitable power source.
On the basis of Figs 1 and 11-12 it will now be described how the step arrangements 1, 2 are movable in an angle to the movement path 8. In the example it is illustrated how the moving arrangement is thought to include the abovementioned runner members 14, 20. More precisely, it 10 is illustrated to the right in Fig 12 how the running members 14, 20 are rotatably mounted on a lever arm 26 which in its turn is turnably mounted at the framework 15 of the device around a point indicated with 27 in Figs 1 and 11. This mounting point is formed by means of a bearing pin 28 which can be seen to the right in Fig 12. The lever arm 15 26 is arranged to be turned by means of a power member 29, e.g. of a type with variable length, which can be connected to the lever arm 26 in an articulated way, for example around the pin 30 illustrated to the right in Fig 12. A stay 31 illustrated at the bottom of Fig 12 is sup-posed to be connected to the lever arm 26 in an articulated way at the 20 indicated point 32 and to a second lever-arm 33 at a point 34. This lever arm 33 is turnably mounted at the framework 15 of the device at the point indicated with 35 in Fig 11, said point being materialized by means of a turning pin 36. The other lever arm 33 presents bearing pins 37 on which the other runner rolls 14, 20 which are seen at the 25 top of Fig 11 are rotatably mounted.
It will be realized that such moving members that have been described on the basis of Figs 11 and 12 are also present at the far end of the device in Fig 1.
As the lever arms 26, 33 carrying the runner members 14, 20 are pre-sent in the positions according to Fig 1 the guides 13, 19 are sepa-rated at their maximum from each other. This means that the step ar-rangement 1 is retracted/lowered at maximum while the step arrange-35 ment 2 is projected/elevated at its maximum. When now, however, thelever arms 26 and 33 and thereby the runner members 14, 20 are moved to their positions indicated in Fig 11 through contraction of the C ~21 53~17 power member 29, connecting lines between the centres of the runner members 14, 20 will extend obliquely in relation to the longitudinal centre lines of the guides 13, 19, which will mean that the guides are forced together. This leads to the step arrangement 1 being pro-5 jected/elevated according to Fig 1 while the step arrangement 2 is si-multaneously retracted/lowered. These movements of the step ar-rangements 1, 2 in a direction with an angle to the movement path 8 has, however, no effect on the movements of the step arrangements along the movement path 8 because of the free movement of the 10 runner members 14, 20 along the guides. Instead it is only the crank-like driving arrangement 7 according to Fig 10 which defines the positions of the step arrangements 1, 2 along the movement path 8.
During use of the device according to the invention boards are sup-15 plied to the region of the lower parts of the step arrangements 1, 2, forinstance by means of a conveyer 38 indicated in Fig 1. Boards will thus be in such a position that they can be caught one at a time by the step arrangement which for the moment is in its rear end position. The boards are then successively conveyed further up the step arrange-20 ments in the way explained on basis of Fig~ 13-19.
Of course the device just described can be modified in a plurality of ways within the scope of the invention. In certain embodiments of the device it would for example be possible to make one of the step 25 arrangements stationary while only one of the step arrangements would be movable. In another embodiment it would be possible to make one of the step arrangements movable along the movement path 8 while the other step arrangement would be immovable along the movement path 8 but would be able to move with an angle thereto 30 instead to obtain a requested feeding function. Finally, it is pointed out that it would possibly be useful to construct the device in such a way that the movement path 8 for the step arrangements 1 and 2 would be generally horizontal, possibly rectilinear, in which case the step provided upper sides of the step arrangements 1, 2 would suitably also 35 be constructed as generally rectilinear and horizontal apart from the step structure.
Claims (14)
1. A device for piecemeal crossfeeding of elongated elements (A-F) comprising two arrangements (1, 2) provided with steps and intended for engagement with the elements, and at least one of which is movable reciprocatingly by means of a driving arrangement (7) to give the step arrangements a relative movability along a movement path (8), the movable step arrangement being arranged to entrain elements received on the steps (3, 4) of the step arrangement during movement forwards along the movement path, and leave the elements on the steps of the other step arrangement during movement backwards along the movement path, characterized in that it comprises an arrangement (9) for moving at least one of the step arrangements (1,
2) between a projected position in which the step arrangement is intended to support the elements and a retracted position in which the step arrangement is in a position where it is retracted inwardly of elements supported by the second step arrangement.
2. A device for piecemeal cross feeding of elongated elements, comprising two arrangements (1, 2) provided with steps and intended for engagement with the elements, and at least one of which is movable reciprocatingly by means of a driving arrangement (7) to give the step arrangement a relative movability along a movement path (8), the movable step arrangement being arranged to entrain elements re-ceived on the steps of the step arrangement during movement for-wards along the movement path, and leave the elements on the steps of the other step arrangement during movement backwards along the movement path, characterized in that the movement path (8) is curved like an arch.
2. A device for piecemeal cross feeding of elongated elements, comprising two arrangements (1, 2) provided with steps and intended for engagement with the elements, and at least one of which is movable reciprocatingly by means of a driving arrangement (7) to give the step arrangement a relative movability along a movement path (8), the movable step arrangement being arranged to entrain elements re-ceived on the steps of the step arrangement during movement for-wards along the movement path, and leave the elements on the steps of the other step arrangement during movement backwards along the movement path, characterized in that the movement path (8) is curved like an arch.
3. A device for piecemeal cross feeding of elongated elements, comprising two arrangements (1, 2) provided with steps and intended for engagement with the elements, and at least one of which is movable reciprocatingly by means of a driving arrangement (7) to give the step arrangement a relative movability along a movement path (8), the movable step arrangement being arranged to entrain elements re-ceived on the steps of the step arrangement during movement for-wards along the movement path, and leave the elements on the steps of the other step arrangement during movement backwards along the movement path, characterized in that both step arrangements (1, 2) are arranged reciprocatingly movable along the movement path (8).
4. A device according to any of the preceding claims, characterized in that the movement path (8) slopes to form an inclination for the elements.
5. A device according to any of the preceding claims, characterized in that the stepped upper sides of the step arrangements (1, 2) are generally curved like arcs, apart from the step structure.
6. A device according to claim 5, characterized in that the inclination of the stepped upper sides of the step arrangements (1, 2), apart from the step structure, increases in a direction upwards along the moving path (8).
7. A device according to any of claims 1-2 and 4-6, characterized in that both step arrangements (1, 2) are movably arranged along the movement path (8).
8. A device according to any of claims 3 and 7, characterized in that the step arrangements (1, 2) are driven with phase displacement by the driving arrangements (7), to make one of the step arrangements move backwards as the other step arrangement moves forwards along the movement path and inverse.
9. A device according to any of claims 2-8, characterized by an arrangement (9) for moving at least one of the step arrangements (1, 2) in an angle to the movement path between a projected position in which the step arrangement is intended to support the elements, and a retracted position in which said step arrangement is in a position where it is retracted inwardly of elements supported by the other step arrangement.
10. A device according to claim 9, characterized in that the moving arrangement (9) comprises members (14, 20) for moving the two step arrangements (1, 2) in an angle to the movement path, and that these moving members are arranged to make the first of the step arrange-ments stay projected as the other step arrangement is retracted and inversely.
11. A device according to any of the preceding claims, characterized in that the driving arrangement (7) and the moving arrangement (9) are co-ordinated with one another in such a way that when the at least one step arrangement moves forward it is simultaneously projected, and it is retracted as it moves back again.
12. A device according to claim 11, characterized in that the moving arrangement (9) is arranged to move the at least one step arrange-ment between its projected and retracted positions respectively when this step arrangement is located in the area of its rear and front end positions respectively.
13. A device according to claim 11 or 12, characterized in that the movement path (8) is defined by co-operating guide and runner members (13, 19, 14, 20) and that the moving arrangement (9) is arranged to move the guide and/or runner members in an angle to the movement path (8).
14. A device according to any of the preceding claims, characterized in that the elongated elements are timber pieces, particularly boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002153917A CA2153917A1 (en) | 1995-07-14 | 1995-07-14 | Device for piecemeal cross feeding of elongated elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002153917A CA2153917A1 (en) | 1995-07-14 | 1995-07-14 | Device for piecemeal cross feeding of elongated elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2153917A1 true CA2153917A1 (en) | 1997-01-15 |
Family
ID=4156224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002153917A Abandoned CA2153917A1 (en) | 1995-07-14 | 1995-07-14 | Device for piecemeal cross feeding of elongated elements |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2153917A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6450324B1 (en) | 2000-02-25 | 2002-09-17 | Linden Fabricating & Engineering Ltd. | Double acting log singulator |
-
1995
- 1995-07-14 CA CA002153917A patent/CA2153917A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6450324B1 (en) | 2000-02-25 | 2002-09-17 | Linden Fabricating & Engineering Ltd. | Double acting log singulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20010316 |