GB2224072A - Fastener for fastening two members - Google Patents
Fastener for fastening two members Download PDFInfo
- Publication number
- GB2224072A GB2224072A GB8923275A GB8923275A GB2224072A GB 2224072 A GB2224072 A GB 2224072A GB 8923275 A GB8923275 A GB 8923275A GB 8923275 A GB8923275 A GB 8923275A GB 2224072 A GB2224072 A GB 2224072A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- retainer element
- retainer
- fastener
- bolt
- 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- Withdrawn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
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000005755 formation reaction Methods 0.000 claims abstract description 4
- 230000000295 complement effect Effects 0.000 claims abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 2
- 239000004033 plastic Substances 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007937 lozenge Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B47/00—Cabinets, racks or shelf units, characterised by features related to dismountability or building-up from elements
- A47B47/02—Cabinets, racks or shelf units, characterised by features related to dismountability or building-up from elements made of metal only
- A47B47/03—Cabinets, racks or shelf units, characterised by features related to dismountability or building-up from elements made of metal only with panels separate from the frame
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C3/00—Fastening devices with bolts moving pivotally or rotatively
- E05C3/02—Fastening devices with bolts moving pivotally or rotatively without latching action
- E05C3/04—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt
- E05C3/041—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt rotating about an axis perpendicular to the surface on which the fastener is mounted
- E05C3/042—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt rotating about an axis perpendicular to the surface on which the fastener is mounted the handle being at one side, the bolt at the other side or inside the wing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/02—Releasable fastening devices locking by rotation
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/0056—Locks with adjustable or exchangeable lock parts
- E05B63/006—Locks with adjustable or exchangeable lock parts for different door thicknesses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/10—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of bayonet connections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Dowels (AREA)
Abstract
The fastener comprises a bolt 13 and a retainer element (or assembly) 5 threadably engaged with bolt shank 12, the retainer element 5 having a pair of abutments 6 for engagement with the rear of the second 4 of two members 3, 4 to be fastened. The fastener further includes a retainer sleeve 9 located between the retainer element 5 and the head 14 of the bolt 13. The sleeve 9 has a bore 8 of non-circular cross-section in which is located a compression spring 10 and one end of the retainer element 5. Stops 7 on the retainer element 5 engage with complementary formations in the bore 8 of the sleeve 9 or the aperture (19, 21 Figure 2) in which the fastener is located in use in order to define the inoperative and operative positions of the retainer element 5. In the embodiment of Figures 1-4 members 3, 4 are respectively attached to or formed integrally with cabinet door 1 and frame 2 and the sleeve 9 has a screw-threaded shank 17 with a pair of flats 18 the sleeve being retained on member 3 by a nut 20, which provides adjustability. To provide frictional engagement between element 5 and bolt 13, the bolt may have plastics patch or element may have helicoil insert with upset thread. In the embodiment of Figures 5-14 the fastener is for fastening panels together of office furniture. Sleeve 9 is cup- shaped with flats (22, Figures 8, 9) by means of which it is gripped and rotated. Sleeve 9 also has eyed protrusions (24, Figures 7, 11) through which a tie (25, Figure 9) passes. <IMAGE>
Description
DESCRIPTION QUARTER-TURN PAWL FASTENER
The present invention relates to quarter-turn pawl fasteners such as a commonly used, for example, to retain doors or covers on cabinets or the like.
More particularly, the invention relates to such a fastener having the feature of adjustability to enable changes in the spacing between the two members being fastened together.
EP-A-0047157 discloses a fastener of this general type comprising a bolt having a head and a screw-threaded shank; a retainer element or assembly threadably secured to the shank as a friction fit thereon, the retainer element or assembly having a pair of abutments for engagement with the rear of the second of two members, through an aperture in which the retainer element or assembly locates in use, the retainer element or assembly including at least one pair of stops for engagement with the sides of the aperture in the second member or a corresponding aperture in the first member through which the fastener is mounted in use, to define the inoperative and operative positions of the retainer element or assembly, and a compression spring located in use between the retainer element or assembly and an opposed surface of the first member to retain the retainer element or assembly in its inoperative position, under the action of friction, when the retainer element or assembly is disengaged from the first member. Whilst such a fastener can work satisfactorily, it has to be assembled at the aperture in the first member, in other words it has to be assembled in-situ.
According to the present invention a fastener of this known prior art type further comprises a retainer sleeve located between the retainer element and the head of the bolt, the retainer sleeve having a bore of non-circular cross-section in which is located the compression spring and one end of the retainer element, the stops on the retainer element engaging with complementary formations in the bore of the sleeve or the aperture in which the fastener is located in use in order to define the inoperative and operative positions of the retainer element. By such means, the fastener may be pre-assembled in large measure before being offered up to the aperture in the first member (on which it may be secured by means of a retaining nut or washer or the like).
In one embodiment the retainer sleeve includes a portion which is arranged to extend through the aperture in the first member, to be located in position by a flat or similar formation on the external surface of the sleeve, the sleeve having a head portion in which the head of the bolt is located and a screw-threaded shank for cooperation with a retainer nut to secure the retainer sleeve in position on the first member. In order to effect fixing on the first member, the fastener, preassembled but for the retainer nut, is offered up to the aperture in the first member which is formed with a pair of flats or the like for engagement with corresponding flats on the sleeve, and the nut is then attached on the screw threaded shank from the rear of the first member.In order for this to be achievable the lateral extent of the abutments on the retainer element is arranged to be less than the diameter of the sleeve shank.
In a second embodiment the sleeve is substantially cup-shaped and is not arranged to be fixedly secured to the first member. In this case, the exterior of the sleeve may be formed with flats for cooperation with a spanner or similar tool, the stops on the retainer element locating in one position only within a bore in the sleeve and the sleeve itself being rotatable between inoperative and operative positions in order to lock the first and second members together.
In both embodiments, adjustability for different thicknesses or to achieve pull-up is achieved by means of the screw threaded engagement of the bolt with the retainer element, and fixing and operation are straightforward and uncomplicated.
Two examples of fasteners constructed in accordance with the present invention will now be described with reference to the accompanying drawings in which:
Figure 1 illustrates a composite longitudinal section through a first fastener when assembled and in use;
Figure 2 illustrates the shape of the apertures in the respective support and panel on which the fastener is located;
Figure 3 illustrates an end view of the faastener;
Figure 4 illustrates a plan view of the fastener;
Figure 5 illustrates a longitudinal section through a second example in an open position;
Figure 6 illustrates a partial section through the fastener of Figure 5 in a closed position;
Figure 7 is a external view corresponding to
Figure 6;
Figure 8 is a plan view from beneath the second fastener;
Figure 9 is a plan view from above of the second fastener;;
Figures 10 and 11 are orthogonal views of the sleeve of the second fastener in longitudinal section;
Figure 12 is an end view of the sleeve; and,
Figures 13 and 14 illustrate a side view and an end view of the retainer element of the second fastener.
The first example shown in Figure 1 is particularly intended for use in closing a door panel 1 against the frame 2 of a cabinet or the like, the fastener locating on first and second members 3 and 4 respectively attached to or formed integrally with the door 1 and frame 2.
The fastener has a retainer element 5 which has a pair of laterally extending pawl abutments 6 at one end and, at the other end, a pair of laterally extending stops 7. The end of the retainer element having the stops 7 locates in a bore 8 in a retainer sleeve 9 and a compression spring 10 is disposed between the end of the bore 8 and the top (as shown) of the retainer element 5. The spring causes the retainer element and sleeve to be extended as far as possible, in order to help locate the pawl abutments in a suitable position to be subsequently rotated behind the second member. The retainer element 5 has an internal screw threaded bore 11 which engages with the external screw thread 12a of the shank 12 of a bolt 13 which extends through the retainer sleeve 9, its head 14 being located in a recess 15 in a head 16 of the sleeve.To provide sufficient frictional engagement between the retainer element and the bolt, the bolt may have a plastics patch or the retainer element may have a helicoil insert with an upset thread engaging the bolt thread. The sleeve has a screw threaded shank 17 with a pair of flats 18 which positively angularly locate the sleeve within the aperture 19 in the panel 3, the sleeve being retained on the panel 3 by a retainer nut 20 which is screw threaded onto the shank 17 after the fastener has been passed into the aperture 19. It will be noticed that the lateral extent of the abutments 6 is less than the overall diameter of the screw threaded shank 17 of the sleeve 9 so that the nut 20 can pass over the pawl abutments.
The aperture 21 in the member 4 on the frame 2 is elongate so that rotation of the retainer element 5 can locate the abutments 6 behind a portion of the support member 4 in the operative position.
The retainer element is confined to rotate only through about 900 between its operative and inoperative positions by means of the stops 7 engaging shoulders 8' formed in the bore 8. A pair of shoulders 8', each extending over approximately 90e, is provided so that two angular positions, spaced 90O apart, can be adopted by the retainer element within the sleeve.
Such a fastener is able to provide for relatively high ultimate loads whilst still enabling quick release and re-useability and can be manufactured without high cost. The fastener is adjustable by means of the thread of the bolt engaging with the thread of the retainer element and against the bias of the spring 10 which also provides a further measure of frictional engagement between the two so that rotation of the bolt rotates the retainer element into the desired position.
The second example illustrated in Figures 6 onwards has, overall, a fairly similar construction, and like parts are given the same reference numeral.
The second fastener is designed specifically for attaching a pair of panels or members 3, 4 together, the panels having identical apertures 21 through which the fastener locates and being represented by dashed lines in Figure 6. For example, the fastener may be used to attach elements of office furniture such as screens, cabinets or the like. For simplicity and to provide reversability, standard size apertures 21 are desired which should be of a shape generally similar to those shown in
Figure 2.
The fastener has a retainer element 5, also shown separately in Figures 13 and 14, with laterally extending pawl abutments 6 and has a screw-threaded bore 11 for engagement with the screw thread 12a of the shank 12 of a bolt 13. The pawl abutments 6 are provided with sharp points 6a which cut into the panel 4 when the fastener is tightened so as to provide electrical earth contact. Six such points 6a are shown in the example.
The retainer sleeve 9, shown in Figures 10 to 12, is generally cup-shaped and of circular shape, in this example but includes a pair of knurled side flats 22 by means of which the sleeve 9 may be gripped and rotated. The sleeve 9 also has six sharp points 17a at the end of its shank 17, which function in an identical way to the points 6a of the element 5.
A compression spring 10 is positioned within the sleeve in order to bias the retainer element outwards, but also provides friction between the screw threads 11 and 12a so that the fastener can be rotated by the bolt alone. The element 5 has an elongate shank having a generally lozenge shaped cross-section to provide stops 7 which are located within the non-circular bore 8 in the sleeve 9 in order to fix the rotational position of the retainer element 5 relative to the sleeve 9.
The sleeve 9 has a pair of small locking shoulders 23 which are positioned and configured so as to drop into the aperture 21 in the adjacent panel when the fastener is rotated to the locked position.
This provides an indication to the user that the fastener is in the locked position and also prevents re-rotation of the fastener, for example due to vibration, out of the locked position, without unscrewing of the bolt. The shoulders 23 may be chamfered to assist rotation in the opposite direction by the operator and to avoid the need for the operator to pull out the sleeve before undoing the fastener.
The sleeve 9 also has a pair of eyed protrusions 24 through which a tie 25 passes. This tie 25 can be used to retain the pre-assembled fastener on the panel during transit in a position adjacent the aperture, so as to be ready for rapid assembly and immediate use.
In use, the assembled fastener is presented to the aligned apertures in the panels 3 and 4 and the sleeve 9 is then rotated until the abutments formed by the lozenge-shaped cross section engage the sides of the apertures 21. Thereafter, as desired, the bolt 13 can be rotated in order to pull up the abutments 6 against the rear of the panel or member 4.
Such a fastener provides an immediate indication of rotation of the retainer element into the correct and secure operative position by means of the rotation of the sleeve 9 while enabling pull-up to be achieved and allowing the fastener to be fully pre-assembled before attachment.
Claims (11)
1. A fastener comprising a bolt having a head and a screw-threaded shank; a retainer element or assembly threadably secured to the shank as a friction fit thereon, the retainer element or assembly having a pair of abutments for engagement with the rear of the second of two members, through an aperture in which the retainer element or assembly locates in use, the retainer element or assembly including at least one pair of stops for engagement with the sides of the aperture in the second member or a corresponding aperture in the first member through which the fastener is mounted in use, to define the inoperative and operative positions of the retainer element or assembly, and a compression spring located in use between the retainer element or assembly and an opposed surface of the first member to retain the retainer element or assembly in its inoperative position, under the action of friction, when the retainer element or assembly is disengaged from the second member; and, a retainer sleeve located between the retainer element and the head of the bolt, the retainer sleeve having a bore of non-circular cross-section in which is located the compression spring and one end of the retainer element, the stops on the retainer element engaging with complementary formations in the bore of the sleeve or the aperture in which the fastener is located in use in order to define the inoperative and operative positions of the retainer element.
2. A fastener according to claim 1, wherein the retainer sleeve has a portion which is arranged to extend through the aperture in the first member.
3. A fastener according to claim 2, wherein the retainer sleeve portion has locating means for locating the sleeve in position in the aperture in the first member.
4. A fastener according to any of claims 1 to 3, wherein the sleeve has a screw-threaded shank for co-operation with a retainer nut to secure the retainer sleeve in postion on the first member, the lateral extent of the abutments on the retainer element being less than the diameter of the sleeve shank.
5. A fastener according to claim 1, wherein the sleeve is provided with flats for co-operation with a spanner or the like.
6. A fastener according to claim 1 or claim 5, wherein the sleeve has at least one shoulder arranged so as to locate the sleeve positively in the aperture in the first member.
7. A fastener according to claim 6, wherein the at least one shoulder is chamfered.
8. A fastener according to any of the preceding claims, wherein the sleeve has at least one eyed protrusion at its head end.
9. A fastener according to any of the preceding claims, wherein the sleeve has a head portion in which the head of the bolt is located in use.
10. A fastener according to any of the preceding claims, wherein either or both the sleeve and element are provided with sharp points for making electrical earth contact with the panel or panels.
11. A fastener substantially as described with reference to either Figues 1 to 4, or Figures 5 to 14, of the accompanyin. drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB888824449A GB8824449D0 (en) | 1988-10-19 | 1988-10-19 | Quarter-turn pawl fastener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8923275D0 GB8923275D0 (en) | 1989-12-06 |
| GB2224072A true GB2224072A (en) | 1990-04-25 |
Family
ID=10645424
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888824449A Pending GB8824449D0 (en) | 1988-10-19 | 1988-10-19 | Quarter-turn pawl fastener |
| GB8923275A Withdrawn GB2224072A (en) | 1988-10-19 | 1989-10-16 | Fastener for fastening two members |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888824449A Pending GB8824449D0 (en) | 1988-10-19 | 1988-10-19 | Quarter-turn pawl fastener |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8824449D0 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1065391A1 (en) * | 1999-07-02 | 2001-01-03 | Fairchild Fasteners Europe - Camloc GmbH | Fastening device |
| US6260304B1 (en) | 1997-04-01 | 2001-07-17 | Beheermaatschappij H.D. Groeneveld B.V. | Door structure |
| FR3050965A1 (en) * | 2016-05-09 | 2017-11-10 | Peugeot Citroen Automobiles Sa | STORAGE DEVICE FOR MOTOR VEHICLE. |
| EP3347606A4 (en) * | 2015-09-10 | 2019-05-08 | Newpark Mats&Integrated Services LLC | Apparatus and methods for connecting components of a support surface |
| EP3690139A1 (en) * | 2014-08-21 | 2020-08-05 | Linebacker UK Limited | Support unit for forming a temporary roadway |
| US20230036003A1 (en) * | 2021-07-27 | 2023-02-02 | Optex Co., Ltd. | Fastening structure and object detection device including fastening structure |
| EP4137709A3 (en) * | 2021-06-04 | 2023-05-24 | Gregor Endres | Fastening element, core composite structure, fixing system and vehicle having a core composite structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1197421A (en) * | 1968-01-09 | 1970-07-01 | Rex Chainbelt Inc | Adjustable Quick Acting Fastener |
-
1988
- 1988-10-19 GB GB888824449A patent/GB8824449D0/en active Pending
-
1989
- 1989-10-16 GB GB8923275A patent/GB2224072A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1197421A (en) * | 1968-01-09 | 1970-07-01 | Rex Chainbelt Inc | Adjustable Quick Acting Fastener |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6260304B1 (en) | 1997-04-01 | 2001-07-17 | Beheermaatschappij H.D. Groeneveld B.V. | Door structure |
| EP1065391A1 (en) * | 1999-07-02 | 2001-01-03 | Fairchild Fasteners Europe - Camloc GmbH | Fastening device |
| EP3690139A1 (en) * | 2014-08-21 | 2020-08-05 | Linebacker UK Limited | Support unit for forming a temporary roadway |
| EP3347606A4 (en) * | 2015-09-10 | 2019-05-08 | Newpark Mats&Integrated Services LLC | Apparatus and methods for connecting components of a support surface |
| FR3050965A1 (en) * | 2016-05-09 | 2017-11-10 | Peugeot Citroen Automobiles Sa | STORAGE DEVICE FOR MOTOR VEHICLE. |
| WO2017194858A1 (en) * | 2016-05-09 | 2017-11-16 | Psa Automobiles S.A. | Storage device for a motor vehicle |
| CN109154321A (en) * | 2016-05-09 | 2019-01-04 | 标致雪铁龙汽车股份有限公司 | The article-storage device of motor vehicles |
| CN109154321B (en) * | 2016-05-09 | 2020-07-17 | 标致雪铁龙汽车股份有限公司 | Storage device for a motor vehicle |
| EP4137709A3 (en) * | 2021-06-04 | 2023-05-24 | Gregor Endres | Fastening element, core composite structure, fixing system and vehicle having a core composite structure |
| US20230036003A1 (en) * | 2021-07-27 | 2023-02-02 | Optex Co., Ltd. | Fastening structure and object detection device including fastening structure |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8824449D0 (en) | 1988-11-23 |
| GB8923275D0 (en) | 1989-12-06 |
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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) |