GB2264545A - "push-in expansible sleeve" - Google Patents
"push-in expansible sleeve" Download PDFInfo
- Publication number
- GB2264545A GB2264545A GB9301969A GB9301969A GB2264545A GB 2264545 A GB2264545 A GB 2264545A GB 9301969 A GB9301969 A GB 9301969A GB 9301969 A GB9301969 A GB 9301969A GB 2264545 A GB2264545 A GB 2264545A
- Authority
- GB
- United Kingdom
- Prior art keywords
- push
- nut
- shank portion
- screw
- bore
- 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- Withdrawn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
- 239000000463 material Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 239000002991 molded plastic Substances 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000037431 insertion Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 1
Classifications
-
- 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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/12—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like
- F16B13/124—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like fastened by inserting a threaded element, e.g. screw or bolt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
- Insertion Pins And Rivets (AREA)
- Connection Of Plates (AREA)
Abstract
In use, a push-in expansible sleeve having a head is inserted in an opening in a carrier plate and a screw is then screwed into the push-in sleeve, to expand the end of the sleeve projecting from the plate, the sleeve comprising a slot (4), and a slot (6) at right angles to it. The ends (7, 8) of the slots (4, 6) extend at least as far as each other, and preferably overlap. The bore of the sleeve is unthreaded so that the screw cuts its own thread. The sleeve is resilient moulded plastics. <IMAGE>
Description
PUSH-TN NUT
The invention relates to a push-in nut of the type that is inserted into an opening in a carrier plate and then receives a screw which is screwed in from the same side.
In a typical prior art arrangement, the bore is of such a size that the inside diameter is smaller than the outside diameter of the screw to be inserted so that, when the screw is screwed in, the screw itself cuts its thread in the wall of the bore and, in so doing, urges a divided shank portion laterally apart. When that happens, the outside walls of the shank portion are pressed firmly against the edge of the opening in the carrier plate.
lt is found that that nut is unsatisfactory in that the bottom part of the shank portion cannot make any contribution to the anchoring effect. Instead, the operation of screwing in the screw is made still more difficult by virtue of the non-yielding bottom part of the shank portion, so that there is the risk that the screw is over-tightened and may then break or shear off.
According to the pressen invention, there is provided a push-in nut insertable into an opening in a carrier plate for then receiving a screw, the push-in nut comprising: a head portion for abutting against the carrier plate adiacent to the opening; and a shank portion insertable into the opening in the carrier plate, the shank portion being integrally connected to th head portion; the head and shank portions being pierced by a bore for receiving the thread of the screw; the head portion and the adjoining part of the shank portion being divided by a first longitudinal slot which extends radially relative to the bare; and the free end of the shank portion being divided by a second longitudinal slot which (i) extends radially relative to the bare, (ii) is transverse to the first longitudinal slot and (iii) is deep enough to extend at least to the first longitudinal slot.
The present invention uses the lower part of the shank portion to improve the anchoring effect and the operation of screwing in the screw is facilitated.
That second slot not only improves the anchoring effect but also enables the push-in nut to be anchored equally well in thin and in thick carrier plates When dealing with thin plates, the projecting halves of the shank portion are spread far apart, whereby the holding force is considerably increased. When dealing with thick carrier plates, there is the advantage that the lower part of the shank portion is also pressed firmly against the wall of the opening in the carrier plate, so that in this case also the holding force is increased.
A non-limiting embodiment of a push-in nut according to the invention is illustrated in the accompanying drawings, in which:
Figure 1 is a view of the embodiment of the push-in nut according to the invention in longitudinal section taken along line I-I in Figure 2;
Figure 2 is a front view of the push-in nut;
Figure 3 is a plan view of the push-in nut;
Figure 4 shows the push-in nut being inserted into an opening in a thick carrier plate;
Figure 5 shows the push-in nut inserted into the thick carrier plate, with a screw screwed therein; and
Figure 6 shows the push-in nut inserted into a thin carrier plate, with a screw screwed in
The push-in nut shown in the Figures is insertable into an opening 9 in a carrier plate 10 (see Figure 4) and receives a screw 11 which is to be screwed in from the same side (Figures 5 and 6), i.e the screw 11 is screwed in in the direction of insertion of the push-in nut into the opening 9
The push-in nut which is made from elastic plastics material comprises a head portion or plate 1 and a shank portion 2 which is moulded thereon and which is adapted to fit the opening 9 in the carrier plate 10.The head plate 1 and the shank portion 2 are pierced by a smooth bore 3 which serves to receive the thread of the screw, the inside diameter of the bore 3 being smaller than the outside diameter of the screw 11 so that, when the screw is screwed in, it cuts its own thread in the push-in nut.
The head plate 1 and the adjoining upper part of the shank portion 2 are divided by a longitudinal slot 4 which extends radially with respect to the bore 3, whereby the two upper halves of the shank portion are pressed laterally apart when the screw 11 is screwed in (see Figure 5). In that connection, the slot 4 is as narrow as possible so that as much shank portion material as possible is available for anchoring in the opening 9 in the plate.
So that the lower part of the shank portion can also be put to use to provide the anchoring effect, the shank portion 2 is divided, from its insertion end 5, by a further longitudinal slot 6 which extends radially relative to the bore 3. The slot 6 is cut at a right angle to the first longitudinal slot and its end 7 extends at least as far as the end 8 of the first-mentioned slot 4.In that way, when the screw 11 is screwed in, the two lower halves of the shank portion are also urged laterally away from each other (see Figure 6) lt is even more favourable, with regard to effective expansion of the shank portion 2 when the screw is screwed in, if the two slots 4 and 6 overlap each other at their ends 7 and 8 and if the slot 6 which begins at the insertion end 5 extends upwards into the region 2' of the shank portion, beneath the head plate 1.
It has been found that a push-in nut which is slotted from both ends in this way has a holding force, in the opening in the carrier plate, which is more than twice as great as a push-in nut which is equivalent in terms of material and cross-section but which has only one slot. The holding force of a push-in nut which is slotted from both ends is also equally good both when used in relation to thin and in relation to thicker carrier plates.
Finally it has been found that the double cross-wise slotting completely eliminates the risk of the screw being over-tightened and sheared off.
Claims (7)
1. A push-in nut insertable into an opening in a carrier plate for then receiving a screw, the push-in nut comprising:
a head portion for abutting against the carrier plate adjacent to the opening; and
a shank portion insertable into the opening in the carrier plate, the shank portion being integrally connected to the head portion;
the head and shank portions being pierced by a bore for receiving the thread of the screw;
the head portion and the adjoining part of the shank portion being divided by a first longitudinal slot which extends radially relative to the bore; and
the free end of the shank portion being divided by a second longitudinal slot which (i) extends radially relative to the bore, tii) is transverse to the first longitudinal slot and (iii) is deep enough to extend at least to the first longitudinal slot.
2. A push-in nut according to claim l, wherein the bore is smooth.
3. A push-in nut according to claim 1 or 2, wherein the first and second longitudinal slots are substantially at right angles to each other.
4. A push-in nut according to any one of claims 1 to 3, wherein the push-in nut is made of elastic plastics material
5. A push-in nut according to any one of claims 1 to 4, wherein the two slots are sufficiently deep as to over7ap each other.
6. A push-in nut according to claim 5 < wherein the second slot is deep enough to extend into the part of the shank portion adjoining the head portion.
7. A push-in nut substantially as herein described with reference to, or with reference to and as illustrated in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9202546U DE9202546U1 (en) | 1992-02-27 | 1992-02-27 | Plastic plug nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9301969D0 GB9301969D0 (en) | 1993-03-17 |
| GB2264545A true GB2264545A (en) | 1993-09-01 |
Family
ID=6876606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9301969A Withdrawn GB2264545A (en) | 1992-02-27 | 1993-02-02 | "push-in expansible sleeve" |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2600128Y2 (en) |
| DE (1) | DE9202546U1 (en) |
| ES (1) | ES1023459Y (en) |
| FR (1) | FR2689940B3 (en) |
| GB (1) | GB2264545A (en) |
| IT (1) | IT229644Y1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2288000A (en) * | 1994-03-22 | 1995-10-04 | Avdel Systems Ltd | Expansible socket for screws |
| GB2290311A (en) * | 1994-06-17 | 1995-12-20 | Terence James Sheehy | Winding thread onto a card or reel |
| FR2854212A1 (en) * | 2003-04-28 | 2004-10-29 | Genus Technologies | Mechanical parts assembling and centering device, has tapped bushing having threaded centering part containing expansion slits so that rod can be slidingly assembled and disassembled in bores of mechanical parts when screw is loosened |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2744772B1 (en) * | 1996-02-13 | 1998-04-30 | Gobin Daude | FIXING DEVICE, PARTICULARLY FOR FIXING AN ACCESSORY ON A WALL |
| DE19607446A1 (en) * | 1996-02-28 | 1997-09-04 | Adolf Wuerth Gmbh & Co Kg | Knock-in dowels |
| DE102013009195A1 (en) | 2013-06-03 | 2014-12-04 | Grohe Ag | Pipe connection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB589648A (en) * | 1944-06-15 | 1947-06-26 | Cecil Arthur Taylor | Improvements in or relating to fixing devices such as wall-plugs |
| GB899013A (en) * | 1958-11-11 | 1962-06-20 | Oswald Willy Thorsman | Improvements relating to expansible plugs for securing bolts, screws, nails and the like in walls and other surfaces |
| GB1311805A (en) * | 1969-04-10 | 1973-03-28 | Us Expansion Bolt Co Gb Ltd | Expansion anchor for screws and the like |
| GB2051995A (en) * | 1979-07-04 | 1981-01-21 | Coupe R | Wall plug |
| GB2245326A (en) * | 1990-06-22 | 1992-01-02 | Pilgrim Moorside Ltd | Expansion bolt assembly |
-
1992
- 1992-02-27 DE DE9202546U patent/DE9202546U1/en not_active Expired - Lifetime
-
1993
- 1993-01-14 ES ES9300071U patent/ES1023459Y/en not_active Expired - Fee Related
- 1993-02-02 GB GB9301969A patent/GB2264545A/en not_active Withdrawn
- 1993-02-12 IT IT93MI000122U patent/IT229644Y1/en active IP Right Grant
- 1993-02-23 JP JP596193U patent/JP2600128Y2/en not_active Expired - Fee Related
- 1993-02-25 FR FR9302408A patent/FR2689940B3/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB589648A (en) * | 1944-06-15 | 1947-06-26 | Cecil Arthur Taylor | Improvements in or relating to fixing devices such as wall-plugs |
| GB899013A (en) * | 1958-11-11 | 1962-06-20 | Oswald Willy Thorsman | Improvements relating to expansible plugs for securing bolts, screws, nails and the like in walls and other surfaces |
| GB1311805A (en) * | 1969-04-10 | 1973-03-28 | Us Expansion Bolt Co Gb Ltd | Expansion anchor for screws and the like |
| GB2051995A (en) * | 1979-07-04 | 1981-01-21 | Coupe R | Wall plug |
| GB2245326A (en) * | 1990-06-22 | 1992-01-02 | Pilgrim Moorside Ltd | Expansion bolt assembly |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2288000A (en) * | 1994-03-22 | 1995-10-04 | Avdel Systems Ltd | Expansible socket for screws |
| GB2290311A (en) * | 1994-06-17 | 1995-12-20 | Terence James Sheehy | Winding thread onto a card or reel |
| FR2854212A1 (en) * | 2003-04-28 | 2004-10-29 | Genus Technologies | Mechanical parts assembling and centering device, has tapped bushing having threaded centering part containing expansion slits so that rod can be slidingly assembled and disassembled in bores of mechanical parts when screw is loosened |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9301969D0 (en) | 1993-03-17 |
| ITMI930122U1 (en) | 1994-08-12 |
| IT229644Y1 (en) | 1999-01-29 |
| JPH0583424U (en) | 1993-11-12 |
| FR2689940B3 (en) | 1994-03-11 |
| ES1023459U (en) | 1993-07-01 |
| DE9202546U1 (en) | 1993-06-24 |
| JP2600128Y2 (en) | 1999-10-04 |
| ES1023459Y (en) | 1994-02-01 |
| ITMI930122V0 (en) | 1993-02-12 |
| FR2689940A3 (en) | 1993-10-15 |
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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) |