CA1071567A - Conveyer track apparatus for logs - Google Patents
Conveyer track apparatus for logsInfo
- Publication number
- CA1071567A CA1071567A CA208,095A CA208095A CA1071567A CA 1071567 A CA1071567 A CA 1071567A CA 208095 A CA208095 A CA 208095A CA 1071567 A CA1071567 A CA 1071567A
- Authority
- CA
- Canada
- Prior art keywords
- track
- conveyer
- logs
- bars
- rigid
- 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.)
- Expired
Links
- 230000000452 restraining effect Effects 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000000284 resting effect Effects 0.000 description 3
- 101100016398 Danio rerio hars gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/94—Devices for flexing or tilting travelling structures; Throw-off carriages
- B65G47/945—Devices for flexing or tilting travelling structures; Throw-off carriages tilting endless surfaces, e.g. belts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chain Conveyers (AREA)
- Framework For Endless Conveyors (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A simple and efficient conveyor track apparatus for logs conveyed by an endless conveyer belt or chain and having stations for the rolling off of logs. According to the invention there is provided in a conveyer track apparatus for logs, an endless conveyer belt arranged in the conveyer track and provided with transverse supporting means having an upright directed shallow outcarved supporting surface or a surface with portions sloping towards each other at an obtuse angle, a pair of parallel lifting rails individually disposed on either sides of the conveyer track at each removal station individually raise a lifting rail so as to cause the supporting means disposed above the lifting rail to tilt and the log supported thereby to roll off at said station towards one side of the conveyer track, each lifting rail being supported by at least two longitudinally spaced links pivotably mounted in bearings in the track, said links being disposed in a vertical plane parallel to the plane of the rails and connected to operative means for causing the links to swing upwardly to cause tilting of said supporting means.
A simple and efficient conveyor track apparatus for logs conveyed by an endless conveyer belt or chain and having stations for the rolling off of logs. According to the invention there is provided in a conveyer track apparatus for logs, an endless conveyer belt arranged in the conveyer track and provided with transverse supporting means having an upright directed shallow outcarved supporting surface or a surface with portions sloping towards each other at an obtuse angle, a pair of parallel lifting rails individually disposed on either sides of the conveyer track at each removal station individually raise a lifting rail so as to cause the supporting means disposed above the lifting rail to tilt and the log supported thereby to roll off at said station towards one side of the conveyer track, each lifting rail being supported by at least two longitudinally spaced links pivotably mounted in bearings in the track, said links being disposed in a vertical plane parallel to the plane of the rails and connected to operative means for causing the links to swing upwardly to cause tilting of said supporting means.
Description
The present invention relates to a conveyor track apparatus for conveying logs by means of an endless conveying belt or chain and provided with transverse supporting means having an upwardly directed shallow outcarved supporting surface or a surface with portions sloping towards each other in an obtuse angle for supporting the logs, and at locations for dislodging the logs along the track there are pairs of parallel li~ting rails and lifting means for individually lifting o~ a desired lifting rail in order to tilt the supporting means above the lifting rail and cause the log in the tilted supporting means to roll off towards one side of the track apparatus.
Such an apparatus is disclosed in the Swedish patent specification No. 204,770 in which each lifting rail ~ -is carried by links swingable in a direction transversel~ of the conveyer. It will be seen from the Fig. 3 of the patent, that on raising a lifting rail this must slide laterally along the underside of the relevant supporting means. Moreover, the patent discloses a rather complicated construction for the transfer of the lifting movement from a motor to the links.
Swedish Patent 343 554 discloses an apparatus, in which sections of the conveyer belt can be laterally tilted for the tilting of the desired supporting means. However, since the pivot axle of these sections is located at a small distance below the supporting means on lateral tilt of a section of the portion of the ~onveyer belt or chain the section will be substantially moved to the side and slightly lowered, whiah is evident from the Fig. 2 of the patent.
This causes a violent bending of the conveyer belt or -chain, and further the risk exists, that portions of the conveyer belt or -~hain will be influenced which for the time being will be situated on sections adjacent to a tilted section, F
so that a log resting on those portions will be rolled off at an undesired place.
~ he present invention provides a more simple and efficient apparatus avoiding the difficulties above mentioned.
~ ccording to the present invention there is provided a conveying and discharge apparatus for logs comprising:
a fixèd elevated track in the form of a substantially flat and continuous elongate surface extending along the length of the apparatus; an endless conveyer including a generally horizontal upper run and a lower run, a pair of laterally-spaced, flexible elements which, in the upper run of the conveyer are laid on said track, said endless conveyer including support cradles secured to and hridging the laterally spaced flexible elements for supporting the logs thereon, the support cradles including an upper support surface having a shallow-recess for extending transversely of and stabilizing the logs being conveyed; pairs of rigid, lifting bars disposed at a discharge station and having a raised position and a retracted position, said bars being arranged in mutually parallel relation with respect to each other and so as to project partially through slits formed in said track at said discharge station in vertical alignment with a respective flexible element of said conveyer, upper edges of said hars in said retracted position engaging and guiding the respective elements on said track, said bars further spanning a length of said track not less than the distance hetween adjacent support cradles; pairs of articulated links pivotally connected between a fixed support and a respective rigid lifting bar in longitudinally spaced relation therewith for restraining upward movement of the rigid lifting bars to occur only in parallel relation relative to the track whereby selective upward movement of one of the rigid bars will raise F
. .
~.~3~ P~
one or the other of said flexible elements of the endless conveyer and tilt a pair o~ cradles laterally to one side or the other of the conveyer run; and means operatively connected to at least one of said pairs of articulated links operatively connected to a respectively lifting element for pivoting said one link about the fixed support and causing the rigid lifting bar to move vertically to the raised position and thereby discharge a log laterally off the conveyer.
The present invention will be further illustrated by way of the accompanying drawings, in which:
Fig. 1 is a schematic view in side elevation of a portion of a conveyer track apparatus according to one embodiment of the invention, and Fig~ 2 is a sectional view on line A-A in Fig. 1.
In the drawings, a conveyer track apparatus comprises a fixed elevated track 1 in the form of a substantially flat and continuous elongate surface extencling along the length of the apparatus and carried by spaced trestles 3. An endless conveyer includes a generally horizontal upper run and a lower run and comprises a pair of laterally spaced flexible elements in the form of chains 2 which, in the upper run, are laid on the upper surface of the track 1. Supporting means 4, in the form of cradles, are uniformly disposed along the conveyer and bridge and are secured to the chains 2. Each supporting means 4 has an upright shallow outcarved supporting surface 5 or supporting surface 5 with portions sloping towards each other in an obtuse angle, so that normally a log, (not shown) resting on at least two sequential supporting means ~ will remain thereon in a stabilized position and can be conveyed along the conveyer track. Along said conveyer track are discharge stations for the rolling off of logs and suitably these stations are arranged between adjacent trestles 3.
Such a station is shown in Fig. 1 and has a pair of adjacent, rigid, li~ting bars 6, in the form of elongate plates, parallel to the conveyer track and spanning a distance not less than the distance between adjacent support means 4. Each lifting bar has a raised position and a retracted position which i5 shown in Fig. 1. Each lifting bar has an upper edge extending through a slit in the upper surface of the track 1 which is in vertical alignment with, and which engages and guides a respective chain 2 when in the retracted position illustrated in Fig. 1. Each chain, as shown in Fig. 1, by the broken outline comprises portions spanning and depending over the top edge portions of the lifting bars 6. Lifting means are provided for selectively raising a particular lifti~g bar in order to lift the associated chain 2 and thereby tilt the supporting means 4 situated above the lifting bars 6 to cause a log to roll off at one side of the conveyer track which was resting on tilted supporting means 4.
Each lifting bar is carried by respective pairs of vertically upswingable articulated links 7 carried in bearings fixed in the conveyer track apparatus so that the links are pivotally connected to a fixed support provided by said conveyer track apparatus. The links 7 with the associated lifting bar form a parallelogram structure and restrain upward movement of the rigid lifting bars to occur only in parallel relation relative to the track. A hydraulic cylinder 8 is connected to one link 7 of each pair to pivot the links and raise the lifting bar 6 associated therewith vertically straight upwards. This causes the supporting means 4 to tilt and discharge the log carried thereby off the conveyer.
A slight lateral movement of the tilted supporting means 4 occurs and the reduced stress to the conveyer belt or chain 2 is reduced and further the effect on tho~e adjacent supporting means 4, the tilting of which is not required, is reduced.
Different hydraulic cylinders 8 are operable from an operating console at the end of the conveyer track where the logs are fed on to the conveyer belt or chain 2. The supporting means 4 may connect two parallel chains to a single chain 2.
1~ .
.
Such an apparatus is disclosed in the Swedish patent specification No. 204,770 in which each lifting rail ~ -is carried by links swingable in a direction transversel~ of the conveyer. It will be seen from the Fig. 3 of the patent, that on raising a lifting rail this must slide laterally along the underside of the relevant supporting means. Moreover, the patent discloses a rather complicated construction for the transfer of the lifting movement from a motor to the links.
Swedish Patent 343 554 discloses an apparatus, in which sections of the conveyer belt can be laterally tilted for the tilting of the desired supporting means. However, since the pivot axle of these sections is located at a small distance below the supporting means on lateral tilt of a section of the portion of the ~onveyer belt or chain the section will be substantially moved to the side and slightly lowered, whiah is evident from the Fig. 2 of the patent.
This causes a violent bending of the conveyer belt or -chain, and further the risk exists, that portions of the conveyer belt or -~hain will be influenced which for the time being will be situated on sections adjacent to a tilted section, F
so that a log resting on those portions will be rolled off at an undesired place.
~ he present invention provides a more simple and efficient apparatus avoiding the difficulties above mentioned.
~ ccording to the present invention there is provided a conveying and discharge apparatus for logs comprising:
a fixèd elevated track in the form of a substantially flat and continuous elongate surface extending along the length of the apparatus; an endless conveyer including a generally horizontal upper run and a lower run, a pair of laterally-spaced, flexible elements which, in the upper run of the conveyer are laid on said track, said endless conveyer including support cradles secured to and hridging the laterally spaced flexible elements for supporting the logs thereon, the support cradles including an upper support surface having a shallow-recess for extending transversely of and stabilizing the logs being conveyed; pairs of rigid, lifting bars disposed at a discharge station and having a raised position and a retracted position, said bars being arranged in mutually parallel relation with respect to each other and so as to project partially through slits formed in said track at said discharge station in vertical alignment with a respective flexible element of said conveyer, upper edges of said hars in said retracted position engaging and guiding the respective elements on said track, said bars further spanning a length of said track not less than the distance hetween adjacent support cradles; pairs of articulated links pivotally connected between a fixed support and a respective rigid lifting bar in longitudinally spaced relation therewith for restraining upward movement of the rigid lifting bars to occur only in parallel relation relative to the track whereby selective upward movement of one of the rigid bars will raise F
. .
~.~3~ P~
one or the other of said flexible elements of the endless conveyer and tilt a pair o~ cradles laterally to one side or the other of the conveyer run; and means operatively connected to at least one of said pairs of articulated links operatively connected to a respectively lifting element for pivoting said one link about the fixed support and causing the rigid lifting bar to move vertically to the raised position and thereby discharge a log laterally off the conveyer.
The present invention will be further illustrated by way of the accompanying drawings, in which:
Fig. 1 is a schematic view in side elevation of a portion of a conveyer track apparatus according to one embodiment of the invention, and Fig~ 2 is a sectional view on line A-A in Fig. 1.
In the drawings, a conveyer track apparatus comprises a fixed elevated track 1 in the form of a substantially flat and continuous elongate surface extencling along the length of the apparatus and carried by spaced trestles 3. An endless conveyer includes a generally horizontal upper run and a lower run and comprises a pair of laterally spaced flexible elements in the form of chains 2 which, in the upper run, are laid on the upper surface of the track 1. Supporting means 4, in the form of cradles, are uniformly disposed along the conveyer and bridge and are secured to the chains 2. Each supporting means 4 has an upright shallow outcarved supporting surface 5 or supporting surface 5 with portions sloping towards each other in an obtuse angle, so that normally a log, (not shown) resting on at least two sequential supporting means ~ will remain thereon in a stabilized position and can be conveyed along the conveyer track. Along said conveyer track are discharge stations for the rolling off of logs and suitably these stations are arranged between adjacent trestles 3.
Such a station is shown in Fig. 1 and has a pair of adjacent, rigid, li~ting bars 6, in the form of elongate plates, parallel to the conveyer track and spanning a distance not less than the distance between adjacent support means 4. Each lifting bar has a raised position and a retracted position which i5 shown in Fig. 1. Each lifting bar has an upper edge extending through a slit in the upper surface of the track 1 which is in vertical alignment with, and which engages and guides a respective chain 2 when in the retracted position illustrated in Fig. 1. Each chain, as shown in Fig. 1, by the broken outline comprises portions spanning and depending over the top edge portions of the lifting bars 6. Lifting means are provided for selectively raising a particular lifti~g bar in order to lift the associated chain 2 and thereby tilt the supporting means 4 situated above the lifting bars 6 to cause a log to roll off at one side of the conveyer track which was resting on tilted supporting means 4.
Each lifting bar is carried by respective pairs of vertically upswingable articulated links 7 carried in bearings fixed in the conveyer track apparatus so that the links are pivotally connected to a fixed support provided by said conveyer track apparatus. The links 7 with the associated lifting bar form a parallelogram structure and restrain upward movement of the rigid lifting bars to occur only in parallel relation relative to the track. A hydraulic cylinder 8 is connected to one link 7 of each pair to pivot the links and raise the lifting bar 6 associated therewith vertically straight upwards. This causes the supporting means 4 to tilt and discharge the log carried thereby off the conveyer.
A slight lateral movement of the tilted supporting means 4 occurs and the reduced stress to the conveyer belt or chain 2 is reduced and further the effect on tho~e adjacent supporting means 4, the tilting of which is not required, is reduced.
Different hydraulic cylinders 8 are operable from an operating console at the end of the conveyer track where the logs are fed on to the conveyer belt or chain 2. The supporting means 4 may connect two parallel chains to a single chain 2.
1~ .
.
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A conveying and discharge apparatus for logs comprising: a fixed elevated track in the form of a substantially flat and continuous elongate surface extending along the length of the apparatus: an endless conveyer including a generally horizontal upper run and a lower run, a pair of laterally-spaced, flexible elements which, in the upper run of the conveyer are laid on said track, said endless conveyer including support cradles secured to and bridging the laterally spaced flexible elements for supporting the logs thereon, the support cradles including an upper support surface having a shallow-recess for extending transversely of and stabilizing the logs being conveyed; pairs of rigid, lifting bars disposed at a discharge station and having a raised position and a retracted position, said bars being arranged in mutually parallel relation with respect to each other and so as to project partially through slits formed in said track at said discharge station in vertical alignment with a respective flexible element of said conveyer, upper edges of said bars in said retracted position engaging and guiding the respective elements on said track, said bars further spanning a length of said track not less than the distance between adjacent support cradles; pairs of articulated links pivotally connected between a fixed support and a respective rigid lifting bar in longitudinally spaced relation therewith for restraining upward movement of the rigid lifting bars to occur only in parallel relation relative to the track whereby selective upward movement of one of the rigid bars will raise one or the other of said flexible elements of the endless conveyer and tilt a pair of cradles laterally to one side or the other of the conveyer run; and means operatively connected to at least one of said pairs of articulated links operatively connected to a respective lifting bar for pivoting said one link about the fixed support and causing the rigid lifting bar to move vertically to the raised position and thereby discharge a log laterally off the conveyer.
2. The apparatus as claimed in claim 1, in which said flexible elements of the conveyer run comprise portions spanning and depending over top edge portions of the rigid, lifting bars, said rigid lifting bars comprising elongated plates beneath the respective flexible elements, said articulated links forming with the fixed support a parallelogram structure, said means operatively connected to at least one of said pairs of articulated links comprising a fluid motor.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7311855A SE7311855L (en) | 1973-08-31 | 1973-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1071567A true CA1071567A (en) | 1980-02-12 |
Family
ID=20318386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA208,095A Expired CA1071567A (en) | 1973-08-31 | 1974-08-29 | Conveyer track apparatus for logs |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT330661B (en) |
| CA (1) | CA1071567A (en) |
| DE (1) | DE2441528A1 (en) |
| FI (1) | FI250174A7 (en) |
| NO (1) | NO743110L (en) |
| SE (1) | SE7311855L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105773135B (en) * | 2016-04-02 | 2018-04-27 | 上海大学 | A kind of filtering layer expands loose device |
| CN109436768B (en) * | 2018-09-28 | 2020-10-09 | 安徽东邦智能设备有限公司 | Upper plate device for processing large-scale plates |
-
1973
- 1973-08-31 SE SE7311855A patent/SE7311855L/xx unknown
-
1974
- 1974-08-27 FI FI2501/74A patent/FI250174A7/fi unknown
- 1974-08-29 NO NO743110A patent/NO743110L/no unknown
- 1974-08-29 CA CA208,095A patent/CA1071567A/en not_active Expired
- 1974-08-30 DE DE2441528A patent/DE2441528A1/en not_active Withdrawn
- 1974-08-30 AT AT703474A patent/AT330661B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FI250174A7 (en) | 1975-03-01 |
| NO743110L (en) | 1975-03-24 |
| SE7311855L (en) | 1975-03-03 |
| AT330661B (en) | 1976-07-12 |
| ATA703474A (en) | 1975-09-15 |
| DE2441528A1 (en) | 1975-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4987992A (en) | Material transfer apparatus | |
| US6109428A (en) | Belt lifting apparatus | |
| US5056655A (en) | Highwall miner with conveyor module | |
| US3176928A (en) | Roll unwind stand | |
| US5823732A (en) | Device for moving insulating glass panes | |
| US4024948A (en) | Conveyor track apparatus for logs | |
| US4465414A (en) | Freight train | |
| CA1071567A (en) | Conveyer track apparatus for logs | |
| US3878935A (en) | Tower-mounted concrete conveyor | |
| CA1166988A (en) | Side suspension conveyor system for poultry | |
| JPH0262305A (en) | Width adjustable chain conveyor | |
| US4346828A (en) | Railroad rail fragmenting apparatus and method | |
| EP2001770B1 (en) | Conveyor for conveying and buffering products | |
| US4121724A (en) | Apparatus for removing bulk material from a dump or stockpile | |
| JP3589599B2 (en) | Square steel transfer equipment | |
| CA1127676A (en) | Article transfer arrangement | |
| US3533118A (en) | Loading bridge | |
| US3071237A (en) | Pipe handling apparatus | |
| JPH11236113A (en) | Transfer device | |
| EP0569073A1 (en) | A conveyor | |
| US3554133A (en) | Automobile conveyor | |
| JP4280059B2 (en) | belt conveyor | |
| US3523606A (en) | Apparatus and method for diverting material from conveyors and the like | |
| US1868514A (en) | Conveyer | |
| AU724470B2 (en) | An advancing tailpiece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |