GB2086593A - Weighing device - Google Patents
Weighing device Download PDFInfo
- Publication number
- GB2086593A GB2086593A GB8130189A GB8130189A GB2086593A GB 2086593 A GB2086593 A GB 2086593A GB 8130189 A GB8130189 A GB 8130189A GB 8130189 A GB8130189 A GB 8130189A GB 2086593 A GB2086593 A GB 2086593A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- support member
- belt
- weighing device
- length
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/04—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having electrical weight-sensitive devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structure Of Belt Conveyors (AREA)
Abstract
A weighing device for use with a conveyor belt 6 has a load-support member 18 arranged transverse to the belt and positioned between two stationary members. The load-support member is supported from one of the stationary members 22 by a parallel linkage 30 which enables the member to move up and down. A load cell 42 is connected to the load-support member and the other stationary member and produces an electrical output responsive to the load applied to the load support member. <IMAGE>
Description
SPECIFICATION
Weighing device
This invention relates to a weighing device and, in particular, to a device in use or for use with a conveyor belt which weighs materials as they are conveyed along the conveyor belt.
It is known for such weighing devices two employ a load cell which is mounted such that its electrical output is responsive to the load applied to the load cell. It is usual for the load cell to be positioned below the support member for the weighing device.
The forces exerted on the load cell, when the device is in use, comprises the weight force, which is resolved normal to the support surface of the conveyor belt, and a drag force, exerted by the belt on the weighing device.
It is an object of the present invention to provide a weighing device which can be used in conjunction with a conveyor belt and which measures the weight force but is substantially free of the effect of the drag force.
According to the present invention, a weighing device in use or for use with a conveyor belt has an elongate load-support member arranged with its longitudinal axis substantially transverse to the length of the belt and positioned between two stationary members, the load-support member being connected by means of a parallel linkage to one of the stationary members such that the loadsupport member is displaceable in the direction normal to its length and normal to the length of the belt and a load cell connected to the load-support member and the other of said stationary members such that the electrical output of the load cell is responsive to displacement of the load-support member in said direction relative to the stationary members.
In a preferred arrangement, the parallel linkage comprises a pair of flexure plates arranged in parallel relation one above the other and each connected to said one stationary member and to the load-support member.
In use, the load is deposited on the conveyor belt and, as the load passes over the load-support member, the electrical output from the load cell is responsive to the load on the conveyor belt. Drag forces applied by the belt to the load-support member have very little effect on the load cell.
In order that the invention may be more readily understood, it will now be described, by way of example only, with reference to the accompanying drawing, in which:
Figure 1 is a plan view of a belt conveyor incorporating a weighing device of the present invention,
Figure2 is a section on the line ll-ll of Figure 1,
Figure 3 is a section on the line Ill-Ill of Figure 2, and
Figure 4 is a detail of Figure 3 to a larger scale.
As shown in the Figures, a belt conveyor has longitudinal members 2, known as "stringers", extending along both sides of the belt and transverse members (not shown) which in turn support rollers 4 which carry the belt 6.
Aweighing device is interpositioned between a pair of the rollers 4. The weighing device comprises an auxiiiary set of rollers 8, rotatable on shafts 10 fixed in brackets 12, and arranged end-to-end on a beam 14. This beam is mounted by means of plates 16 on a generally horizontal load-support beam 18.
A rectangular frame 20 comprising transverse members 22, 24, and rigidly interconnected by angle bars 26, is bolted to the stringers 2. The members 22, 24 are substantially parallel to the beam 18 and constitute a pair of stationary members positioned on opposite sides of the beam 18. A rib 28 is welded to the members 22 and 24. The load-support beam 18 is mounted on a parallel linkage 30 which comprises two flexure plates 32 secured to the upper and lower surfaces respectively of the member 22 and the beam 18. Each flexure plate has reinforcing plates 36,38 attached to its upper and lower surfaces to leave two non-reinforced portions extending parallel to the length of the beam 18.
In an alternative arrangement, each flexure plate has two regions of reduced thickness formed therein, the regions extending parallel to the length of the beam 18. The plates may be of metal, such as spring steel, or a rigid plastics material.
As can be seen, particularly in Figure 3, a lug 40 extends inwardly from the member 24 and to this lug is secured one end of a beam-type load cell 42. The load cell is arranged substantially parallel to stringers 2 and is connected in a manner to be described to the beam 18. A plate 44 projects from the underside of the beam 18 and is provided with a hole through which a vertical bolt 46 extends. A nut 48 is threaded on to the lower end of the bolt and a pair of self-aligning washers 49 is threaded on to the bolt above the part 43. A recessed collar 50 bears on the washers 49 under the action of a compression spring 52 which may be pre-stressed by means of a nut 54.
A flange 56 is formed on the shank of the bolt 46 and fits loosely in the recess formed within the collar 50.
The purpose of this arrangement is to act in conjunction with a mechanicai stop 45 as an overload means to protect the load cell against overload.
In operation, the material being conveyed is arranged on the belt 6 and, when the laden belt posses over the rollers 8, which as can be seen in
Figure 3 are above the horizontal level of the rollers 4, then the weight of the conveyed material and the belt at that particular point is carried by the weighing device consisting of the rollers 8, the brackets 12, the cross bar 14 and the beam 18. The load causes the beam to be displaced downwardly on the parallel linkage and the movement of the beam, and consequently of the part 44, is transferred to the load cell 42. The plate 44, is transferred to the load cell 44, by its connection through washers 47 and nut 48, urges the bolt 46 downwardly and this, in turn, through the nut 54, spring 52, collar 50 and washers 49, transfers the load to the cell load 42.Electrical signals from the load cell give an indication of the weight of the conveyed material. The arrangment of the beam and horizontally disposed load cell is found to provide a conveniently low profile for applications in which space for the insertion of weighing devices is at a premium.
Drag forces applied by the conveyor belt to the rollers 8, and hence to the support beam 18, act substantially parallel to the length of the conveyor belt and these forces do not apply any significant force to the load cell and consequently the output from the load cell is not affected by the drag forces.
The weighing device is conveniently made to have a fixed width that is just less than the minimum width which is encountered between stringers 2. The frame 20 is secured to the stringers by means of the angle bars 26 and, by employing angle bars of different widths, the fixed width weighing device can be secured to pairs of stringers spaced apart by different amounts.
Claims (7)
1. Aweighing device in use or for use with a conveyor belt has an elongate load-support member arranged with its longitudinal axis substantially transverse to the length of the belt and positioned between two stationary members, the load-support member being connected by means of a parallel linkage to one of the stationary members such that the load-support member is displaceable in the direction normal to its length and normal to the length of the belt and a load cell connected to the load-support member and the other of said stationary members such that the electrical output of the load cell is responsive to displacement of the load-support member in said direction relative to the stationary members.
2. A weighing device as claimed in claim 1, in which the parallel linkage comprises a pair of flexure plates arranged in parallel relation one above the other and each connected to said one stationary member and to the load-support member.
3. A weighing device as claimed in claim 2, in which each flexure plate is reinforced to leave two non-reinforced portions extending parallel to the length of the load-support member.
4. A weighing device as claimed in claim 2, in which each flexure plate has two regions of reduced thickness therein, the regions extending parallel to the length of the load-support member.
5. A weighing device as claimed in any preceding claim, in which the connection between the load-support member and the load cell includes means for protecting the load cell against overload.
6. Aweighing device as claimed in any preceding claim, in which the load-support member carries a plurality of rollers arranged end-to-end and arranged to support the belt.
7. Aweighing device substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8130189A GB2086593B (en) | 1980-10-08 | 1981-10-06 | Weighing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8032477 | 1980-10-08 | ||
| GB8130189A GB2086593B (en) | 1980-10-08 | 1981-10-06 | Weighing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2086593A true GB2086593A (en) | 1982-05-12 |
| GB2086593B GB2086593B (en) | 1985-02-06 |
Family
ID=26277149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8130189A Expired GB2086593B (en) | 1980-10-08 | 1981-10-06 | Weighing device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2086593B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2128345A (en) * | 1982-10-08 | 1984-04-26 | Mitchell Cotts Engineering Aus | Weigh frame |
| FR2549603A1 (en) * | 1983-07-21 | 1985-01-25 | Seg Resistor Ab | CONVEYOR BELT WEIGHING DEVICE WITH INDIVIDUALLY ADJUSTABLE ROLLERS |
| GB2166877A (en) * | 1984-11-08 | 1986-05-14 | Dobson Park Ind | Weighing apparatus |
| EP0639263A4 (en) * | 1992-05-05 | 1994-12-28 | Endress & Hauser Inc | Idler station arrangement for a scale apparatus. |
| ES2078170A2 (en) * | 1993-12-21 | 1995-12-01 | Delgado Ladislao Padillo | Continuous weighing system |
| GB2342458A (en) * | 1998-06-13 | 2000-04-12 | Kvaerner Tech & Res Ltd | In-line weighing on a roller table |
| US9834386B2 (en) | 2014-09-12 | 2017-12-05 | Big Dutchman International Gmbh | Dosing apparatus |
| EP2724962B1 (en) * | 2012-10-24 | 2017-12-13 | Big Dutchman International GmbH | Conveyor and method for conveying animal products in an agricultural holding |
| US10820516B2 (en) | 2018-05-08 | 2020-11-03 | Cnh Industrial America Llc | System and method for monitoring the amount of plant materials entering an agricultural harvester |
| US10842134B2 (en) | 2016-09-27 | 2020-11-24 | Big Dutchman International Gmbh | Feeding device for poultry animals |
-
1981
- 1981-10-06 GB GB8130189A patent/GB2086593B/en not_active Expired
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2128345A (en) * | 1982-10-08 | 1984-04-26 | Mitchell Cotts Engineering Aus | Weigh frame |
| FR2549603A1 (en) * | 1983-07-21 | 1985-01-25 | Seg Resistor Ab | CONVEYOR BELT WEIGHING DEVICE WITH INDIVIDUALLY ADJUSTABLE ROLLERS |
| GB2143959A (en) * | 1983-07-21 | 1985-02-20 | Seg Resistor Ab | Weighing device for belt conveyors |
| GB2166877A (en) * | 1984-11-08 | 1986-05-14 | Dobson Park Ind | Weighing apparatus |
| GB2166877B (en) * | 1984-11-08 | 1989-05-17 | Dobson Park Ind | Weighing apparatus |
| EP0639263A1 (en) * | 1992-05-05 | 1995-02-22 | Endress + Hauser, Inc. | Idler station arrangement for a scale apparatus |
| EP0639263A4 (en) * | 1992-05-05 | 1994-12-28 | Endress & Hauser Inc | Idler station arrangement for a scale apparatus. |
| ES2078170A2 (en) * | 1993-12-21 | 1995-12-01 | Delgado Ladislao Padillo | Continuous weighing system |
| GB2342458A (en) * | 1998-06-13 | 2000-04-12 | Kvaerner Tech & Res Ltd | In-line weighing on a roller table |
| GB2342458B (en) * | 1998-06-13 | 2000-08-16 | Kvaerner Tech & Res Ltd | In-line weighing |
| EP2724962B1 (en) * | 2012-10-24 | 2017-12-13 | Big Dutchman International GmbH | Conveyor and method for conveying animal products in an agricultural holding |
| US9834386B2 (en) | 2014-09-12 | 2017-12-05 | Big Dutchman International Gmbh | Dosing apparatus |
| US10842134B2 (en) | 2016-09-27 | 2020-11-24 | Big Dutchman International Gmbh | Feeding device for poultry animals |
| US10820516B2 (en) | 2018-05-08 | 2020-11-03 | Cnh Industrial America Llc | System and method for monitoring the amount of plant materials entering an agricultural harvester |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2086593B (en) | 1985-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4280576A (en) | Low profile tension mounted load cell industrial scale | |
| US3658143A (en) | Flexure plate scale with hydraulic load cell | |
| US3869007A (en) | Weighing table particularly for a roller conveyor | |
| US5111896A (en) | Belt conveyor weighbridge | |
| US4170270A (en) | Apparatus for preventing the overload of a load cell | |
| US5294756A (en) | Conveyor belt scale apparatus | |
| GB2086593A (en) | Weighing device | |
| EP1402238B1 (en) | Chain conveyor in the form of scales | |
| DE3423718A1 (en) | BELT WEIGHING DEVICE WITH INDIVIDUALLY ADJUSTABLE ROLLERS | |
| FI71995B (en) | VAOG | |
| US4261428A (en) | Platform weighing apparatus | |
| EP1111353B1 (en) | Weighing device | |
| EP0423440B1 (en) | Weigh-in-motion scale for vehicles | |
| RU2744985C2 (en) | Transportation and dosing device | |
| WO2001018505A1 (en) | Portable load indicating device for a rail vehicle | |
| US6177639B1 (en) | Swing and roll load cell mount for a weigh scale | |
| DE2504992A1 (en) | WEIGHING DEVICE | |
| CA2040658A1 (en) | Load sensing assembly | |
| US4042051A (en) | Flexibly mounted container system | |
| US4234049A (en) | Mass measuring apparatus | |
| US2980414A (en) | Compression bracket | |
| US3658144A (en) | Weight platform apparatus in a weighing machine | |
| EP1262746B1 (en) | Electronic balance with at least three force sensors | |
| RU26649U1 (en) | IMPACT STRONG WEIGHT MEASUREMENT DEVICE | |
| CA1038894A (en) | Weigh scales |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |