GB2172566A - Loading and unloading articles onto and from a conveyor - Google Patents
Loading and unloading articles onto and from a conveyor Download PDFInfo
- Publication number
- GB2172566A GB2172566A GB08520939A GB8520939A GB2172566A GB 2172566 A GB2172566 A GB 2172566A GB 08520939 A GB08520939 A GB 08520939A GB 8520939 A GB8520939 A GB 8520939A GB 2172566 A GB2172566 A GB 2172566A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conveyor
- springs
- loading
- main conveyor
- articles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/52—Devices for transferring articles or materials between conveyors i.e. discharging or feeding devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wire Processing (AREA)
- Heat Treatment Of Articles (AREA)
- Special Conveying (AREA)
- Attitude Control For Articles On Conveyors (AREA)
- Tunnel Furnaces (AREA)
- Relays Between Conveyors (AREA)
Abstract
Articles e.g. coil springs previously hardened by quenching are tempered by conveying the springs through a draw oven on a main conveyor 3 onto which the springs are transversely loaded in a spaced disposition and from which the tempered springs are transversely unloaded for subsequent processing, the main conveyor 3 being indexed in timed sequence with the loading and unloading of the springs. The loading by mechanism 7 and 9, and the unloading by mechanism 11 is carried out transversely to the direction of conveyance on conveyor 3. The loading mechanism 9 is initiated, while conveyor 3 is stationary, by the presence of articles at mechanism 7, and the unloading mechanism 11 is synchronised with conveyor 3 and cycles at each index of conveyor 3. <IMAGE>
Description
SPECIFICATION
System for the automatic handling and conveying of articles through a treatment station (method)
Background of the invention
1. Field of the invention
The invention generally involves the field of technology pertaining to the handling and conveying of articles through a treatment station of a processing system. More particularly, the invention relates to an improved system for the automatic handling and conveying of coil springs through a draw oven.
2. Background of the invention
The production of coil springs involves forming hot wound coil springs which are hardened by quenching the hot metal in an appropriate quenching medium. Thereafter, the quenched springs are placed within a draw furnace maintained at a predetermined temperature and for a predetermined period of time in order to temper the springs, thereby imparting the desired hardness and toughness characteristics to the final product. In order to assure that the springs receive the desired degree of tempering in the draw furnace, the handling and conveying of the springs into and out of the draw oven must be accomplished in a precise and controlled manner.
Coil springs are typically of different configurations, including cylindrical, conical or barrel shape.
Commercially available systems for handling and conveying coil springs through a draw oven are typically limited only to the handling of springs having a cylindrical configuration. A need has therefore existed for a system capable of automatically loading coil springs of different configurations onto the conveyor of a draw oven and thereafter unloading the tempered springs in an indexed and substantially continuous manner.
Summary of the invention
It is an object of the invention to provide an improved system for handling and conveying articles through a treatments station of a processing line.
It is another object of the invention to provide an improved system for the handling and conveying of quenched coil springs of different configurations through a draw oven, whereby the springs are tempered in an indexed and substantially continuous manner.
These and other objects of the invention are realized through the invention whereby a loading conveyor, provided with several sensor-controlled separation gates which serve to control the spacing between adjacent springs on the conveyor, direct the springs onto a main conveyor from a transverse direction with respect thereto. An adjacent overhead spacing conveyor removes the springs from the loading conveyor and places same onto the main conveyor, while maintaining their spacing. The main conveyor is defined by an endless chain of V-shaped troughs within which the spaced springs are disposed in rows perpendicular to the longitudinal axis of the main conveyor.The springs are thereafter directed by the main conveyor through a draw oven or other appropriate treatment stations, after which treatment the rows of springs are removed by an unloading mechanism which pushes the treated springs onto an unloading conveyor disposed trans tersely to the main conveyor. The main conveyor is driven by an indexing drive which is indexed in timed sequence with the loading and unloading conveyors. The system permits the handling and conveying of springs having different configurations, including cylindrical, conical and barrel shapes.
Other objects, features and advantages of the invention shall become apparent from the following detailed description of a specific embodiment thereof, with reference to the accompanying drawings which form a part of this specification, wherein like reference characters designate corresponding parts of the several views.
Brief description of the drawings
Figure 1 is a plan view of an apparatus for handling and conveying coil springs in accordance with a preferred embodiment of the invention.
Figure 2 is an elevational view of the apparatus of
Figure 1,
Figure 3 is a sectional plan view of the apparatus of Figure 1 depicting the indexing drive system for the main conveyor,
Figure 4 is an elevational view of the indexing drive system of Figure 3,
Figure 5 is a sectional plan view depicting the loading conveyor and spacing mechanism of the apparatus of Figure 1,
Figure 6 is an elevational view of the loading conveyor and indexing mechanism of Figure 5,
Figure 7 is a sectional plan view of the unloading mechanism and unloading conveyor of the apparatus of Figure 1,
Figure 8 is a plan view of the unloading mechanism and unloading conveyor of Figure 7, and
Figure 9 is a cross-sectional view taken along the line 9-9 of Figure 8.
Detailed description of the preferred embodiment
An apparatus 1 according to a preferred embodiment of the invention shall now be described with initial reference to Figures 1 and 2. As shown therein, apparatus 1 comprises a main conveyor 3 onto which articles, such as coil springs, are loaded and conveyed through a treatment station 5, such as a draw oven, and thereafter unloaded for subsequent processing. The loading of springs onto main conveyor 3 is accomplished by means of a loading conveyor 7 and a spacing mechanism 9, both of which serve to direct springs onto main conveyor 3 from a direction transverse or perpendicular to the longitudinal drive direction of main conveyor 3.After treatment through oven 5, the springs are removed from main conveyor 3 in a direction transverse or
perpendicular to the drive direction of main conveyor 3 by an unloading mechanism 11 and an
associated unloading conveyor 13. Main conveyor 3
is driven by an index drive system 15 which is in part
supported on a frame 17 of main conveyor3.
Main conveyor 3 is preferably of an endless chain type driven by a pair of socket drums 19 and 21, which are in turn driven in an indexed manner by drive system 15. Main conveyor 3 is formed from a plurality of inverted steel angle slats 23, whereby the spaces between adjacent slats are V-shaped for supporting parallel rows of coil springs. Slats 23 are supported on a plurality of parallel endless chains 25.
The details of index drive system 15 shall now be described with reference to Figures 3 and 4. Drive system 15 includes an electric motor 27 which drives a reduction gear assembly 29 through an electric clutch 31. The output of gear assembly 29 is transmitted to sprocket drum 21 through a chain 33 or other appropriate drive means. Sprocket drum 21 drives main conveyor 3 through a head shaft 35 which in turn is provided with a brake means 37, such as an air-operated brake mechanism. Control of drive system 15 is accomplished by a proximity sensor 39 which is activated by a plurality of outwardly extending projections 41 carried by sprocket drum 21 and disposed in a spaced circular array around its axis of rotation.Signals generated by sensor 39 are sent to an electric impulse counter and adjustable timer 43 which in turn operates in conjunction with conventional relays and interlocks
(not shown) to select the desired pause time for main conveyor 3. As also apparent in Figure 4, a plurality of coil springs S are shown supported in the
V-shaped spaces defined between adjacent inverted slats 23.
The details of the loading conveyor and associated spacing mechanism shall now be described with
reference to Figures 5 and 6. Loading conveyor 7
serves to convey coil springs from a previous
process, such as quenching, to spacing mechanism
9, the latter serving to receive the coil springs and
locating same at predetermined spacings between
adjacent springs on main conveyor 3.
Loading conveyor 7 preferably includes an endless
chain 45 driven about a pair of transmission rollers
47 and 49 by a gear loading assembly 51 capable of
imparting a fixed speed to conveyor 7. A pair of
adjustable guide rails 53 and 55 are associated with
endless chain 45 for the purpose of maintaining the
springs on conveyor 7 during their movement. A pair
of pneumatic cylinder-operated gates 57 and 59 are
carried by conveyor 7 and adjustable along the
length thereof for the purpose of establishing the
desired spacings between adjacent springs being
conveyed on conveyor 7. A sensor 61 is provided at
the discharge end of conveyor 7 and a sensor 63 is
provided between gates 57 and 59. Sensors 61 and
63 may comprise photocells or other appropriate
proximity sensors well known in the art and deemed
appropriate for the practice of the invention.Sensors
61 and 63 are carried by slides 53 and 55, with their
respective positions being adjustable along the
length of conveyor 7 to accommodate springs of
varying lengths.
Springs conveyed to the discharge end of loading
conveyor 7 are removed by spacing mechanism 9
and disposed within the V-shaped spaces defined
between adjacent slats 23 of main conveyor 3. This is accomplished by means of a plurality of spaced paddles 65 supported on an endless chain 67 that is in turn driven by a clutch 69 associated with a plurality of transmission rollers 71. Clutch 69 is directly connected to a drive assembly 73 that includes a variable speed motor 75 and an appropriate brake mechanism 77. This arrangement permits individual paddles 65 to advance in increments of a desired distance, with the increment distance being controlled by a sensor 77, such as a proximity switch, disposed adjacent the input end of mechanism 9.As also shown in Figure 6, a plurality of springs S of different configurations, including cylindrical, conical and barrel shapes, may be conveyed and spaced on main conveyor 3 by loading conveyor 7 and associated spacing mechanism 9.
The details of unloading mechanism 11 and its associated unloading conveyor 13 shall now be described with reference to Figures 7 and 8. As apparent therein, unloading mechanism 11 is substantially identical to previously described spacing mechanism 9. Moreover, unloading conveyor 13 is also substantially identical to loading conveyor 7, with the primary exception being that conveyor 13 is not provided with gates 57 and 59 associated with conveyor 7. The purpose of unloading mechanism 11 is to sequentially unload coil springs supported on main conveyor 3 from the discharge end of oven 5 onto unloading conveyor 13. The purpose of conveyor 13 is to transport the springs to the next treatment station (not shown) of the process line.
Unloading mechanism 11 includes a plurality of spaced paddles 79 which are structurally similar to paddles 65 of spacing mechanism 9. Paddles 79 are also supported on an endless chain 81 driven by a plurality of spaced transmission rollers 81 and a clutch 83 that is in turn connected to a drive assembly 85 comprised of a variable speed electric motor 87 and an appropriate brake mechanism 89.
The position of paddles 79 may be offset so that coil springs positioned by spacing mechanism 9 are centered between paddles 79 of unloading mechanism 11. The degree of offset is adjustable by means of a sensor 91 positioned adjacent the input end of unloading conveyor 13. Sensor 91 may comprise a proximity switch or similar device and functions to control the positioning of paddles 79.
Springs discharged by unloading mechanism 11 are received on unloading conveyor 13 which is preferably defined by an endless chain 93 driven by a pair of opposed transmission rollers 95 and 97, and an associated gear motor 99.
As shown in Figure 9, individual paddles 79 are shown carried on an endless chain 101 and associated transmission rollers 81. This structural configuration is also preferably identical to that of spacing mechanism 9.
It is understood that the individual components and details forming apparatus 1 may comprise any structural or electrical configuration well known in the art and deemed appropriate for the practice of the invention as disclosed herein. As previously indicated, the sensors and proximity switches may
comprise photocells or any other type of equivalent function devices. All system controls and logic requirements can be realized through conventional electrical relays, timers, interlocks and the like, preferably through hard wiring. Solid state programmable controllers may also be utilized.Though apparatus 1 has been disclosed in its preferred embodiment for the handling and conveying of coil springs through a draw oven tempering treatment, it is clearly understood that the basic structural and functional characteristics of the invention shall lend themselves to advantage in the handling and conveying of any other type of articles as deemed appropriate by one of ordinary skill in the art.
Mode ofoperation The mode of operation, and particularly the sequence of operation of the components of apparatus 1 shall now be described with general reference being made to Figures 1-9, and specifically with respect to the handling and conveying of springs S of different configurations through draw oven 5.
Drive system 15 permits main conveyor 3 to advance in increments of a predetermined distance and at a desired advancing speed. Conveyor 3 is also controlled to undergo sequential pauses, with each pause being for a predetermined length of time, in order to permit the loading of springs thereon by loading conveyor and spacing mechanism 9, and also the unloading of springs therefrom by unloading mechanism 11 and unloading conveyor 13. Such incremental advances and pauses constitutes cycles of conveyor 3 and are determined and indexed by drive system 15. For example, coil springs of conventional sizes may be loaded and unloaded up to five springs at a time for each repeated cycle.
Assuming a condition wherein main conveyor 3 is at rest after completing a given cycle, with motor 27 running, clutch 31 disengaged and brake 37 engaged, proximity sensor 39 provides a signal to pause timer 43 to start. When pause timer 43 has timed out the predetermined duration of time, electrical signals are transmitted to a counter associated with pause 43 to determine the desired incremental distance of travel for conveyor 3. At this time, brake 37 is disengaged through an appropriate three-way solenoid valve (not shown), and clutch 31
is engaged for transmitting power from motor 27 to sprocket drum 21. This causes drum 21 to rotate
about head shaft 35 until proximity sensor 39 is
engaged by the next projection 41 carried on drum
21.When this occurs, clutch 31 is disengaged, brake
37 is engaged and both pause timer and associated
counter 43 are reset, thereby permitting the cycle to
be repeated.
In describing the overall operating sequence,
several factors are first assumed. All components
making up apparatus 1 are in their activated condi
tion and main conveyor 3 is undergoing cycling. No
coil springs are being passed through input con
veyor 7 and associated separating mechanism 9,
with pneumatic gates 57 and 59 of conveyor 7 being
in their open positions. Variable speed drive assem
bly 73 and conveyor 7 are running, with clutch 69
and brake 77 of mechanism 9 being, respectively,
disengaged and engaged.
Coil springs S received from a previous treatment station in the process line are fed onto input conveyor 7 and separating mechanism 9 at predetermined timed intervals. Each coil spring S passes through open gate 59 and is thereafter sensed by proximity sensor 63, the latter sending a signal through an appropriate relay and solenoid valve assembly (not shown) which closes gate 59. As coil spring S continues through the next open gate 57 and subsequently passes proximity sensor 61, the latter signals gate 57 to be closed through an appropriate relay and solenoid valve assembly (not shown), and also simultaneously signals gate 59 to open.Assuming main conveyor 3 is in the pause state of a cycle, sensor 61 also signals the disengagement of brake 77 and engagement of clutch 69, thereby causing movement of chain drive 67 and its associated paddles 65.The advance distance of each paddle 65 is controlled by sensor 78, which in turn signals the disengagement of clutch 69 and engagement of brake 77. This cycle repeats until main conveyor 3 is filled with parallel rows of coil springs or pause timer 43 times out its predetermined duration and main conveyor 3 commences its advance cycle, clutch 69 and controls are deactivated.
Separating gates 57 and 59 continue to function normally, thereby ensuring coil spring separation until main conveyor 3 completes its advance cycle and resets pause timer43, which in turn reactivates clutch 69 and permits the loading cycle to again commence.
After coil springs S have been passed through draw oven 5, the treated springs are then ready for removal from main conveyor 3 by means of unloading mechainsm 11 and associated unloading conveyor 13. It should be noted that the entire operation of apparatus 1 is inter-locked with pause timer 43 of main conveyor 3 so that clutch 83 and brake 89 are deactivated through appropriate relay and solenoid assemblies (not shown) while main conveyor 3 is in motion. Whereas spacing mechanism 9 is activated by the presence of a coil spring S, unloading mechanism 11 is synchronized with main conveyor 3 and cycles at each index of main conveyor 3. This occurs after main conveyor 3 advances, stops and pause timer 43 is activated, thereby automatically initiating the cycling of unloading mechanism 11.
When this happens, brake 89 is disengaged, clutch 83 is engaged and paddles 79 are caused to advance in accordance with their predetermined incremental distance for discharging a coil spring S onto unloading conveyor 13 for transport to the next treatment station in the process line. Proximity sensor 91 releases clutch 83 and engages brake 89 through an appropriate solenoid valve (not shown) to precisely stop mechanism 11 and simultaneously activates pause counter and timer 43, both of which have been previously set at predetermined intervals. After timer 43 times out its set duration, the cycle then repeats a number of desired times, discharging remaining coil springs S onto conveyor 13 at predetermined intervals in order to insure sufficient distance between adjacent coil springs S so that
entwining of the coils can be prevented, and also
provide sufficient time intervals between coils for
completion of the next cycle.
It is to be understood that the embodiment of the invention herein shown and described is to be taken as merely a preferred example of the same, and that various changes in the shape, size, arrangement of parts, structural characteristics, function and mode of operation may be resorted to without departing from the spirit of the invention or scope of the subjoined claims.
Claims (3)
1. A method for handling and conveying discrete articles through a treatment station of a process line comprising the steps of:
a) providing a main conveyorfortransporting the articles through the treatment station along a longitudinal path;
b) loading articles onto the main conveyor in a predetermined spaced disposition between adjacent articles;
c) conveying the spaced articles through the treatment station on the main conveyor;
d) removing the treated articles from the main conveyor while maintaining the articles in a spaced disposition; and
e) indexing the main conveyor in timed sequence with the loading and unloading of the articles.
2. The method of claim 1 wherein both the loading and unloading of the articles with respect to the main conveyor are accomplished in directions transverse to the longitudinal path of the main conveyor.
3. A method as hereinbefore described and with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71397285A | 1985-03-20 | 1985-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8520939D0 GB8520939D0 (en) | 1985-09-25 |
| GB2172566A true GB2172566A (en) | 1986-09-24 |
Family
ID=24868303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08520939A Withdrawn GB2172566A (en) | 1985-03-20 | 1985-08-21 | Loading and unloading articles onto and from a conveyor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS61217685A (en) |
| BR (1) | BR8505591A (en) |
| DE (1) | DE3532235A1 (en) |
| GB (1) | GB2172566A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6296103B1 (en) * | 1998-12-28 | 2001-10-02 | Adolf Mohr Maschinenfabrik Gmbh & Co Ag | Method of and device for buffering sheets of cut stock in block shaped stacks ranged in rows for cutting |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2740347C1 (en) * | 2020-06-16 | 2021-01-13 | Общество с ограниченной ответственностью Научно-производственное предприятие "МЕТЧИВ" (ООО НПП "МЕТЧИВ") | Process line for workpieces heating |
| KR102502490B1 (en) * | 2022-06-02 | 2023-02-23 | 에스아이에스 주식회사 | Foldable cover apparatus for graphitization furnace |
| CN117002974B (en) * | 2023-10-07 | 2024-02-23 | 常州市福欧车辆配件有限公司 | Stirring and distributing machine for automobile felt production line and distributing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB796813A (en) * | 1955-01-31 | 1958-06-18 | Parker Mitchell Engineering Co | Improvements in and relating to drying or baking ovens, kilns and the like |
| GB1235057A (en) * | 1969-12-18 | 1971-06-09 | Sweetheart Plastics | Improvements in or relating to machines for filling containers with liquid |
| GB1463029A (en) * | 1974-07-12 | 1977-02-02 | Champion Spark Plug Co | Article transfer apparatus |
| GB1542018A (en) * | 1976-05-06 | 1979-03-14 | Gd Spa | Conveying unit for feeding portions of sheet material particularly preshaped or punched pieces of cardboard or the like to a user machine particularly a machine for packaging cigarettes into hinged lid packets |
| GB2068323A (en) * | 1979-12-06 | 1981-08-12 | Griffiths & Sons Malpas Ltd W | Improvements in or relating to packaging |
| GB2142598A (en) * | 1983-06-17 | 1985-01-23 | Cavanna Spa | Conveyor belt device for feeding articles one at a time to a wrapping machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6020444B2 (en) * | 1982-01-12 | 1985-05-22 | マツダ株式会社 | Tempering furnace for hot forged products |
-
1985
- 1985-08-21 GB GB08520939A patent/GB2172566A/en not_active Withdrawn
- 1985-09-10 DE DE19853532235 patent/DE3532235A1/en not_active Withdrawn
- 1985-09-24 JP JP20899285A patent/JPS61217685A/en active Pending
- 1985-11-07 BR BR8505591A patent/BR8505591A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB796813A (en) * | 1955-01-31 | 1958-06-18 | Parker Mitchell Engineering Co | Improvements in and relating to drying or baking ovens, kilns and the like |
| GB1235057A (en) * | 1969-12-18 | 1971-06-09 | Sweetheart Plastics | Improvements in or relating to machines for filling containers with liquid |
| GB1463029A (en) * | 1974-07-12 | 1977-02-02 | Champion Spark Plug Co | Article transfer apparatus |
| GB1542018A (en) * | 1976-05-06 | 1979-03-14 | Gd Spa | Conveying unit for feeding portions of sheet material particularly preshaped or punched pieces of cardboard or the like to a user machine particularly a machine for packaging cigarettes into hinged lid packets |
| GB2068323A (en) * | 1979-12-06 | 1981-08-12 | Griffiths & Sons Malpas Ltd W | Improvements in or relating to packaging |
| GB2142598A (en) * | 1983-06-17 | 1985-01-23 | Cavanna Spa | Conveyor belt device for feeding articles one at a time to a wrapping machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6296103B1 (en) * | 1998-12-28 | 2001-10-02 | Adolf Mohr Maschinenfabrik Gmbh & Co Ag | Method of and device for buffering sheets of cut stock in block shaped stacks ranged in rows for cutting |
Also Published As
| Publication number | Publication date |
|---|---|
| BR8505591A (en) | 1986-12-16 |
| GB8520939D0 (en) | 1985-09-25 |
| JPS61217685A (en) | 1986-09-27 |
| DE3532235A1 (en) | 1986-09-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |