GB2149041A - Attaching elevator buckets to endless belts - Google Patents

Attaching elevator buckets to endless belts Download PDF

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Publication number
GB2149041A
GB2149041A GB8423015A GB8423015A GB2149041A GB 2149041 A GB2149041 A GB 2149041A GB 8423015 A GB8423015 A GB 8423015A GB 8423015 A GB8423015 A GB 8423015A GB 2149041 A GB2149041 A GB 2149041A
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GB
Grant status
Application
Patent type
Prior art keywords
bolt
projections
plate
belt
formed
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Withdrawn
Application number
GB8423015A
Other versions
GB8423015D0 (en )
Inventor
Roger Frederick Hiscock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steelace Ltd
Original Assignee
* STEELACE LIMITED
STEELACE LIMITED
Priority date (The priority date 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 date listed.)
Filing date
Publication date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/22Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/24Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B33/00Features common to bolt and nut
    • F16B33/002Means for preventing rotation of screw-threaded elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/22Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt

Abstract

An elevator bucket is attached to an endless belt by means of a thin oval plate 1 having a circular countersunk portion 3 in one face, projections 5,6,7,8 extending from the other face, and a central hole 4 to receive the bolt of a nut and bolt assembly. The projections 5,6,7,8 are cusp-shaped, with the open faces of the projections lying on lines extending radially of the bolt hole 4 and facing in the same direction as the hand of the bolt thread. The projections 5,6,7,8 are punched out of the plate thereby providing indentations in the countersunk portion 3, which receive corresponding projections formed on the underside of the bolt head. Thus the projections 5,6,7,8 penetrate the endless belt so preventing rotation of the plate 1 when the nut and bolt assembly is tightened down. <IMAGE>

Description

SPECIFICATION Elevator plate The present invention relates to an improved plate used for the attachment of elevator buckets to continuous belts.

Heavy duty elevator buckets are generally attached to a continuous belt by means of a nut and bolt arrangement, the bolt passing through a rectangular washer plate (an elevator plate), the belt, and a side of the bucket, the nut then being tightened down against a second washer and a side of the said bucket.

For ease of attachment the head of the bolt, which is required to be substantially flush with the surface of the first mentioned washer, is contained in a counter sunk portion of the said washerplate and contains projections, e.g. knife edged cylindrical studs, formed on the underside thereof which extend into corresponding holes formed in the plate to prevent relative movement between the plate and the bolt head. In order to prevent rotation of the bolt and plate when the nut is tightened down, the projections may extend through the holes in the plate to penetrate into the surface of the belt.However, in practice, the projections do not extend through the bolt to an extent sufficient to prevent rotation, the length of the projections being governed by the fact that the same bolts are used for the attachment of light duty buckets to a belt in which case elevator plates are not used and the projections on the bolt head penetrate into the belt surface. However it is also common for the elevator plate to include projections formed along the edge portions thereof and which penetrate into the belt and secure it against rotation. This method is not satisfactory since the piates tend to distort when the nut is tightened and as a result are not flush with the belt surface.

We have now found that an improved form of elevator plate comprises a plate, preferably oval shaped, containing a hole for a bolt formed through the base of a counter-sunk portion, which portion is capable of receiving the head of the bolt and including projections formed on the underside of the counter sunk portion. Such projections may be triangular in shape and may be punched out of the plate thereby simultaneously forming holes in which the projections on the bolt head can engage.

Preferably the projections comprise at least two cusp shaped projections formed to extend from the underside of the said counter-sunk portion by punching out of the plate whereby indentations are simultaneously formed in the base of the said counter-sunk portion to receive corresponding projections on the underside of a bolt head.

The open faces of the cusp shaped projections are preferably on lines extending radially of the bolt axis, are all in the same sense and face in the same direction as that of the hand of the bolt thread, when viewed from below.

One embodiment of the invention will now be described with reference to the accompanying drawings in which: Figure 1 is an elevation of the washer from the underside, Figure 2 is an elevation of the washer from above, and Figure 3 is a perspective view of a suitable bolt for use with the plate of Figs. 1 and 2.

Referring to the drawings, an oval plate 1 has a lower surface 2 from which projects a counter sunk portion 3 dimensioned to receive the head 21 of bolt 20 (Fig. 3). A bolt hole 4 is formed centrally of the counter-sunk portion. Cusp shaped projections 5, 6, 7 and 8 are formed in the said counter-sunk portion 3 using a suitable punch acting on the inside of the counter-sunk portion 3 thereby providing indentations 10, 11, 12 and 1 3 in the counter-sunk portion.

A suitable bolt (Fig. 3) comprises a head portion 21 from which extends a threaded shank 22. The bolt has an arcuate under surface 23 from which extends cylindrical shaped projections 24, 25, 26 and 27. The positioning of projections 24 to 27 and indentations 10 to 1 3 are arranged to be complimentary whereby the said projections engage in the said indentations to prevent relative movement between the bolt and the elevator plate during the tightening procedure.

In use, when the nut is tightened onto the shank 22 of bolt 20, the elevator plate 1 is pulled towards the belt and the cusp shaped portions 5 to 8 are forced into the surface of the belt. Because the faces of the cusp portions face the direction of rotation of the tightening action fo the nut they act against the belt to prevent rotation of the plate.

If required a portion of the cusp shaped portions may face in the opposite sense to provide bite against rotation when the nut is slackened on the bolt to enable the bucket to be removed.

Since the projections are formed immediately below the bolt head there is good penetration into the belt and there is no distortion of the plate when the nut is tightened down.

The oval shape of the plate has the advantage of providing the maximum surface area of plate than can be in contact with the belt consistant with the requirement that it is able to readily pass over the belt pulleys. Additionally the plate is resistant to buckling during the tightening procedure.

1. An elevator plate comprising a member including a countersunk portion through which is formed a hole to receive the shank of a bolt, the said countersunk portion being arranged to accept the head of the bolt and including at least two projections extending

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Elevator plate The present invention relates to an improved plate used for the attachment of elevator buckets to continuous belts. Heavy duty elevator buckets are generally attached to a continuous belt by means of a nut and bolt arrangement, the bolt passing through a rectangular washer plate (an elevator plate), the belt, and a side of the bucket, the nut then being tightened down against a second washer and a side of the said bucket. For ease of attachment the head of the bolt, which is required to be substantially flush with the surface of the first mentioned washer, is contained in a counter sunk portion of the said washerplate and contains projections, e.g. knife edged cylindrical studs, formed on the underside thereof which extend into corresponding holes formed in the plate to prevent relative movement between the plate and the bolt head. In order to prevent rotation of the bolt and plate when the nut is tightened down, the projections may extend through the holes in the plate to penetrate into the surface of the belt.However, in practice, the projections do not extend through the bolt to an extent sufficient to prevent rotation, the length of the projections being governed by the fact that the same bolts are used for the attachment of light duty buckets to a belt in which case elevator plates are not used and the projections on the bolt head penetrate into the belt surface. However it is also common for the elevator plate to include projections formed along the edge portions thereof and which penetrate into the belt and secure it against rotation. This method is not satisfactory since the piates tend to distort when the nut is tightened and as a result are not flush with the belt surface. We have now found that an improved form of elevator plate comprises a plate, preferably oval shaped, containing a hole for a bolt formed through the base of a counter-sunk portion, which portion is capable of receiving the head of the bolt and including projections formed on the underside of the counter sunk portion. Such projections may be triangular in shape and may be punched out of the plate thereby simultaneously forming holes in which the projections on the bolt head can engage. Preferably the projections comprise at least two cusp shaped projections formed to extend from the underside of the said counter-sunk portion by punching out of the plate whereby indentations are simultaneously formed in the base of the said counter-sunk portion to receive corresponding projections on the underside of a bolt head. The open faces of the cusp shaped projections are preferably on lines extending radially of the bolt axis, are all in the same sense and face in the same direction as that of the hand of the bolt thread, when viewed from below. One embodiment of the invention will now be described with reference to the accompanying drawings in which: Figure 1 is an elevation of the washer from the underside, Figure 2 is an elevation of the washer from above, and Figure 3 is a perspective view of a suitable bolt for use with the plate of Figs. 1 and 2. Referring to the drawings, an oval plate 1 has a lower surface 2 from which projects a counter sunk portion 3 dimensioned to receive the head 21 of bolt 20 (Fig. 3). A bolt hole 4 is formed centrally of the counter-sunk portion. Cusp shaped projections 5, 6, 7 and 8 are formed in the said counter-sunk portion 3 using a suitable punch acting on the inside of the counter-sunk portion 3 thereby providing indentations 10, 11, 12 and 1 3 in the counter-sunk portion. A suitable bolt (Fig. 3) comprises a head portion 21 from which extends a threaded shank 22. The bolt has an arcuate under surface 23 from which extends cylindrical shaped projections 24, 25, 26 and 27. The positioning of projections 24 to 27 and indentations 10 to 1 3 are arranged to be complimentary whereby the said projections engage in the said indentations to prevent relative movement between the bolt and the elevator plate during the tightening procedure. In use, when the nut is tightened onto the shank 22 of bolt 20, the elevator plate 1 is pulled towards the belt and the cusp shaped portions 5 to 8 are forced into the surface of the belt. Because the faces of the cusp portions face the direction of rotation of the tightening action fo the nut they act against the belt to prevent rotation of the plate. If required a portion of the cusp shaped portions may face in the opposite sense to provide bite against rotation when the nut is slackened on the bolt to enable the bucket to be removed. Since the projections are formed immediately below the bolt head there is good penetration into the belt and there is no distortion of the plate when the nut is tightened down. The oval shape of the plate has the advantage of providing the maximum surface area of plate than can be in contact with the belt consistant with the requirement that it is able to readily pass over the belt pulleys. Additionally the plate is resistant to buckling during the tightening procedure. CLAIMS
1. An elevator plate comprising a member including a countersunk portion through which is formed a hole to receive the shank of a bolt, the said countersunk portion being arranged to accept the head of the bolt and including at least two projections extending outwardly from the underside thereof.
2. A plate according to claim 1 wherein the said member is oval in shape.
3. A plate according to claim 1 or 2 wherein the said projections are triangular in shape and are punched out of the said countersunk portion thereby providing holes capable of receiving corresponding projections extending downwardly from the said bolt head.
4. A plate according to claim 1 or 2 wherein the said projections are cusp shaped and are punched out of the said countersunk portion thereby providing indentations capable of receiving corresponding projections extending downwardly from the said bolt
5. A plate according to claim 4 wherein the cusp shaped projections are formed on lines extending radially of the hole axis and are all in the same sence, the open face of the projections facing in the same direction as the hand of the bolt thread, when viewed from below.
6. An elevator plate substantially as herein described with reference to the drawings.
GB8423015A 1983-10-06 1984-09-12 Elevator plate Withdrawn GB8423015D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8326758A GB8326758D0 (en) 1983-10-06 1983-10-06 Elevator plate

Publications (2)

Publication Number Publication Date
GB8423015D0 GB8423015D0 (en) 1984-10-17
GB2149041A true true GB2149041A (en) 1985-06-05

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
GB8326758A Pending GB8326758D0 (en) 1983-10-06 1983-10-06 Elevator plate
GB8423015A Withdrawn GB8423015D0 (en) 1983-10-06 1984-09-12 Elevator plate

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8326758A Pending GB8326758D0 (en) 1983-10-06 1983-10-06 Elevator plate

Country Status (1)

Country Link
GB (2) GB8326758D0 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763456A (en) * 1987-08-03 1988-08-16 Giannuzzi Louis Roof anchor and stress plate assembly
DE3704763C1 (en) * 1987-02-16 1988-10-13 Voit Willy Gmbh & Co Connection between a bolt, which has a head, and a metal sheet
EP0742123A1 (en) * 1995-05-12 1996-11-13 TRW Occupant Restraint Systems GmbH Method for a safe fastening of an emblem on an airbag cover in a vehicle
GB2363178A (en) * 2000-06-02 2001-12-12 Nat Aerospace Fasteners Corp Locking fastener having projections on head

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB570905A (en) * 1943-11-25 1945-07-27 Bernard Claude Rowing Anti strain and vibration; bolts and screws
GB878470A (en) * 1958-08-26 1961-09-27 Theresia Arnold Improvements in lock washers
GB1035061A (en) * 1963-02-11 1966-07-06 Illinois Tool Works Lockwashers
GB1239607A (en) * 1968-08-14 1971-07-21
GB1539230A (en) * 1975-10-28 1979-01-31 Kinoshita Seiki Kk Conical spring washer
GB2065818A (en) * 1979-11-30 1981-07-01 Mac Lean Fogg Lock Nut Co Fastener assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB570905A (en) * 1943-11-25 1945-07-27 Bernard Claude Rowing Anti strain and vibration; bolts and screws
GB878470A (en) * 1958-08-26 1961-09-27 Theresia Arnold Improvements in lock washers
GB1035061A (en) * 1963-02-11 1966-07-06 Illinois Tool Works Lockwashers
GB1239607A (en) * 1968-08-14 1971-07-21
GB1539230A (en) * 1975-10-28 1979-01-31 Kinoshita Seiki Kk Conical spring washer
GB2065818A (en) * 1979-11-30 1981-07-01 Mac Lean Fogg Lock Nut Co Fastener assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3704763C1 (en) * 1987-02-16 1988-10-13 Voit Willy Gmbh & Co Connection between a bolt, which has a head, and a metal sheet
US4763456A (en) * 1987-08-03 1988-08-16 Giannuzzi Louis Roof anchor and stress plate assembly
EP0742123A1 (en) * 1995-05-12 1996-11-13 TRW Occupant Restraint Systems GmbH Method for a safe fastening of an emblem on an airbag cover in a vehicle
US5775721A (en) * 1995-05-12 1998-07-07 Trw Occupant Restraint Systems Gmbh Cover for a gas bag of an occupant restraining system in vehicles
GB2363178A (en) * 2000-06-02 2001-12-12 Nat Aerospace Fasteners Corp Locking fastener having projections on head
GB2363178B (en) * 2000-06-02 2002-05-01 Nat Aerospace Fasteners Corp Improved locking fastener

Also Published As

Publication number Publication date Type
GB8423015D0 (en) 1984-10-17 grant
GB8326758D0 (en) 1983-11-09 grant

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)