GB2216619A - "Securing bushes in holes" - Google Patents
"Securing bushes in holes" Download PDFInfo
- Publication number
- GB2216619A GB2216619A GB8904931A GB8904931A GB2216619A GB 2216619 A GB2216619 A GB 2216619A GB 8904931 A GB8904931 A GB 8904931A GB 8904931 A GB8904931 A GB 8904931A GB 2216619 A GB2216619 A GB 2216619A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bush
- frame
- metal
- flange
- bushes
- 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- Withdrawn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
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000004411 aluminium Substances 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000007650 screen-printing Methods 0.000 claims abstract description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract 2
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract 2
- 239000010935 stainless steel Substances 0.000 claims abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- WQAQPCDUOCURKW-UHFFFAOYSA-N butanethiol Chemical compound CCCCS WQAQPCDUOCURKW-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
- F16B37/122—Threaded inserts, e.g. "rampa bolts"
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
- F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
- F16B37/064—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting with the use of separate rivets
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Screen Printers (AREA)
Abstract
An internally screw-threaded bush 11 has a flange 12 of sufficient width to allow one or more rivets 13 or screws to be passed through it and through a wall 2 of a screen printing frame 3. Whilst the screen printing frame 3 is made of a soft metal such as aluminium, the bush 11 is made of hard metal such as mild or stainless steel. <IMAGE>
Description
LOCATION BUSH
The present invention relates to the location of a bush in a screen printing frame.
Frames for screen printing generally are of two sorts, wooden and metal. In the latter case, the metal, usually aluminium or steel, is in the form of a square or rectangular extrusion. The shape of the frame is determined by the size of the machine that it is to fit, and appropriate lengths of extrusion are welded together.
On one type of machine, a Svecia machine produced in
Sweden, it is necessary to attach the frame to the machine, and for this purpose location bushes are used, and a T-bar is screwed into each location bush through a plate of the machine, thereby to hold the frame to the machine.
It is possible to use either aluminium or steel to form the bush. However, if an aluminium bush is used, the threads of the bush may be stripped, and the bush then needs replacement. On the other hand, if a steel bush is used in an aluminium frame, it cannot be welded to the frame. Therefore, althbugh it is preferable to use steel bushes, problems have been encountered in locating those bushes in the frame, such that they will not come loose, or spin, when in use. This problem has been known for many years, and the solutions that have been adopted fall into two types. Firstly, the aluminium frame may be expanded and the steel bush inserted into a closely machined hole so that it is firmly gripped when the aluminium contracts.However, with use, even bushes mounted in this way may come loose, and they then have the tendency to spin in the hole, rather than fall out, making it difficult to replace them. The other known method for mounting the bush on the frame is to use a fluted hole, but since the steel is harder than the aluminium, eventually the fluting is worn and again the bush spins.
Thus, there has been no satisfactory solution to the problem of mounting a bush of one metal into a frame of another metal e.g. a steel bush in an aluminium frame.
In practice, frames are allowed to become redundant, and have to be replaced, because their bushes spin, and so cannot be used. It is very difficult to remove the bushes, without damaging the frame.
Although the present invention is primarily envisaged for use where the bush and the frame are of different metals, it is possible to make use of the present invention with bush and frame of the same metal.
Therefore, the present invention proposes that a flange be provided on a bush which is sufficiently wide to enable a suitable fastening means to be passed through the flange and into a body e.g. the frame. That fastening means may be a rivet or screw, or preferably a plurality of rivets or screws, which then holds the bush securely to the frame, and there is no possibility that the bush will spin. Indeed, the. use of rivets has the further advantage that if, by accident, the threads of the bush should become stripped, the bush is easy to replace by drilling out the rivets, without damaging the frame. A new bush may then be re-inserted and the frame may then be used again.
Thus, this apparently simple change in the shape of the bush offers significant advantages and enables the long-standing problem of worn, loose bushes to be overcome. Although the present invention was devised by working on the problem of the mounting of steel bushes in an aluminium frame, it is nevertheless applicable also to steel frames, where the use of riveted bushes again offers the advantage of ease of removal of the bush for replacement.
An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 shows the existing method of mounting a bush in a frame; and
Fig. 2 shows the mounting of a bush in a frame according to the present invention.
Referring first to Fig. 1, a bush 1 is mounted in a wall 2 of a frame 3. A hole 4 is provided in the wall 2, and the shank 5 of the bush extends through that hole 4.
A small flange 6 limits the insertion of the bush 1 into the hole 4. As can be seen, the inner surfaces 7 of the shank 5 are threaded to receive e.g. a screwed T-bar which will secure the frame 3 to the printing machine.
As illustrated, the end 8 of the bore in the bush is sealed closed, to prevent the ingress of water, but it may be open if desired.
As described above, the problem of this arrangement is that it is very difficult to prevent the bush 1 from spinning in the hole 4, particularly with use.
Fig. 2 shows a bush according to the present invention, and features similar to those of the known bush shown in Fig. 1 are indicated by the same reference numerals. In Fig. 2, however, the bush 11 has a larger flange 12, which flange is sufficiently wide to permit rivets 13 to be passed through it, and through the wall 2 of the frame 3, thereby firmly securing the bush 11 to the wall 2.
Of course, although Fig. 2 illustrates the use of rivets, other fastening means may be used, e.g. screws or bolts.
Thus, by widening the flange from 12 mm (for a shank with an internal diameter of about 8 mm) to 25 mm, the flange is made wide enough to receive the rivets 13 without damage, and without damaging the wall 2.
Although it would be possible to use a single rivet, it is preferable to use a number depending on the exact requirements of the frame and the machine.
Claims (7)
1. An assembly of a body with a hole therein and a bush mounted in the hole and fastened to the body by means of one or more fasteners engaging a flange of the bush.
2. An assembly according to claim 1 wherein the body is made of a first metal and the bush is made of a second metal different from the first.
3. An assembly according to claim 2 wherein the first metal is softer than the second metal.
4. An assembly according to claim 2 or claim 3 wherein the first metal is aluminium and the second metal is mild or stainless steel.
5. An assembly according to any one of the preceding claims wherein the fastener is a screw or rivet which passes through the flange of the bush into the body.
6. An assembly of a body and a bush substantially as described herein with reference to and as illustrated in the accompanying drawings.
7. A screen printing frame including an assembly according to any one of the preceding claims.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB888805261A GB8805261D0 (en) | 1988-03-04 | 1988-03-04 | Location bush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8904931D0 GB8904931D0 (en) | 1989-04-12 |
| GB2216619A true GB2216619A (en) | 1989-10-11 |
Family
ID=10632887
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888805261A Pending GB8805261D0 (en) | 1988-03-04 | 1988-03-04 | Location bush |
| GB8904931A Withdrawn GB2216619A (en) | 1988-03-04 | 1989-03-03 | "Securing bushes in holes" |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888805261A Pending GB8805261D0 (en) | 1988-03-04 | 1988-03-04 | Location bush |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8805261D0 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB459460A (en) * | 1935-07-24 | 1937-01-08 | Henry Grant Finestone | Improvements in or relating to day-beds and the like |
| GB807558A (en) * | 1956-01-04 | 1959-01-14 | Carr Fastener Co Ltd | Improvements in and relating to captive nuts |
| GB949336A (en) * | 1960-09-26 | 1964-02-12 | United Carr Fastener Corp | Lock nut assembly |
| GB1100677A (en) * | 1966-02-17 | 1968-01-24 | Marion Gawish | Improvements relating to the fastening of cartons and the like |
| GB2006907A (en) * | 1977-10-28 | 1979-05-10 | Messerschmitt Boelkow Blohm | Connection device proncipally for sheet metal components of light metal alloys |
| EP0206243A1 (en) * | 1985-06-24 | 1986-12-30 | The B.F. GOODRICH Company | Blind fastener |
-
1988
- 1988-03-04 GB GB888805261A patent/GB8805261D0/en active Pending
-
1989
- 1989-03-03 GB GB8904931A patent/GB2216619A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB459460A (en) * | 1935-07-24 | 1937-01-08 | Henry Grant Finestone | Improvements in or relating to day-beds and the like |
| GB807558A (en) * | 1956-01-04 | 1959-01-14 | Carr Fastener Co Ltd | Improvements in and relating to captive nuts |
| GB949336A (en) * | 1960-09-26 | 1964-02-12 | United Carr Fastener Corp | Lock nut assembly |
| GB1100677A (en) * | 1966-02-17 | 1968-01-24 | Marion Gawish | Improvements relating to the fastening of cartons and the like |
| GB2006907A (en) * | 1977-10-28 | 1979-05-10 | Messerschmitt Boelkow Blohm | Connection device proncipally for sheet metal components of light metal alloys |
| EP0206243A1 (en) * | 1985-06-24 | 1986-12-30 | The B.F. GOODRICH Company | Blind fastener |
Non-Patent Citations (2)
| Title |
|---|
| Pp 345 & 346 of "INDUSTRIAL FASTENERS HANDBOOK "-3rd Edition- published * |
| PRESS LIMITED, MORDON, SURREY. (ISBN 85461- * |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8805261D0 (en) | 1988-04-07 |
| GB8904931D0 (en) | 1989-04-12 |
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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) |