WO1993007406A1 - Protective bellows and method for making the same - Google Patents
Protective bellows and method for making the same Download PDFInfo
- Publication number
- WO1993007406A1 WO1993007406A1 PCT/SE1992/000706 SE9200706W WO9307406A1 WO 1993007406 A1 WO1993007406 A1 WO 1993007406A1 SE 9200706 W SE9200706 W SE 9200706W WO 9307406 A1 WO9307406 A1 WO 9307406A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bellows
- fold lines
- blank
- saw
- blanks
- Prior art date
Links
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
- F16J3/041—Non-metallic bellows
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
- B23Q11/0816—Foldable coverings, e.g. bellows
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
Definitions
- the present invention relates to a protective bellows and a method for making the same. More specifically, the invention concerns a protective bellows for enclosing mov ⁇ able parts of a tool, such as a scissors-type lifting table, and a method for making such a bellows.
- Prior-art protective bellows have long been used for widely different purposes.
- One important application concerns the enclosure of movable mechanical devices, such as the underframe of a scissors-type lifting table and piston and cylinder units in vehicles or workshop machinery, for protecting these devices from dirt and/or protecting the operator from injuries.
- prior-art protective bellows are compos ⁇ ed of two or more layers of material, of which one has a stiffening function and the other or others serve to keep the bellows structure together so as to form the finished bellows.
- stiffening elements in the form of springs or steel rings arranged in the folds of the bellows.
- DE 12 51 650 which relates to a bellows composed of three layers of material.
- One layer has a stiffening function and comprises four sheets which are interconnected at the upper and lower edges by a narrow strip of material, whereby to form a coherent piece.
- Each sheet has slits extending across almost the entire sheet width. The slits constitute weakened portions where the material is folded when an inner and an outer layer of flexible material have been glued on to the stiffening layer.
- the object of the present invention is to obviate the above drawbacks in the manufacture of the protective bellows, as well as those associated with the finished bellows.
- Fig. 1 is a schematic perspective view from above of a bellows according to the invention
- Fig. 2 is a schematic perspective view from below of the bellows in Fig. 1;
- Fig. 3 is a schematic plan view of a blank forming part of the bellows in Fig. 1;
- Fig. 4 is a schematic perspective view of the blank in Fig. 3 when folded together.
- Fig. 5 is a schematic perspective view of two inter ⁇ connected blanks.
- Fig. 1 shows a preferred embodiment of a bellows 1 according to the invention.
- This bellows is designed to enclose the underframe of a scissors-type lifting table, and is composed of four sheet-like blanks 2 interconnected along the edges 3 of their long sides.
- the resulting con- necting portions 4 thus constitute the corners of the bellows 1.
- the blanks 2 consist of substantially rectangu ⁇ lar fabrics of a synthetic material, preferably PVC.
- the edges 3 of the long sides of the blanks 2 have a saw-tooth shape, as shown in Fig. 5, which enables two blanks 2 that are interconnected along their long-side edges at an angle to fold.
- the blanks 2 have a first set of fold lines 5, shown in Figs 3 and 5, extending between opposite crests 6 of the saw-tooth long-side edges 3, as well as a second set of fold lines 7 extending between opposite troughs 8 of the saw-tooth long-side edges 3.
- the first set of fold lines 5 is provided on the inside of the blank, i.e. on the side that forms the inside of the bellows
- the second set of fold lines 7 is provided on the outside of the blank.
- the fold lines 5, 7, the blank 2 is divided into fold portions 9.
- the fold lines 5, 7 make the material fold at precisely these lines and in a predetermined direction. Further, the fold lines impart stability to the material, resulting in pliable folding of the bellows 1.
- the fold lines 5, 7 are provided by means of a high-frequency welding machine, but also other tools and methods may, of course, be used.
- the bellows 1 is equip ⁇ ped with an upright circumferential flange 10 formed from an upper end portion 11 of each blank 2, the end portion 11 being twice as wide as a fold portion 9 and being fold ⁇ ed into the shape of a T turned upside-down.
- the web of the end portion thus constitutes the flange, and the branches of the end portion are high-frequency welded to the fold portion 9 adjoining the end portion 11.
- a circumferential channel 12 hav ⁇ ing openings 13 at each corner is provided at the lower end of the bellows 1.
- the channel 12 is formed of the two lowermost fold portions 9 of each blank 2 by high-frequen- cy welding of the lower short-side edge 14 of the blank 2 to the lowermost but one fold portion 9.
- Flat irons, for instance, are introduced in the channel 12 which, with its contents, is fixed to the floor.
- the preferred embodiment of the bellows 1 according to the invention is manufactured as follows.
- Each of the blanks 2 is provided with a first set of fold lines 5 on the inside, and a second set of fold lines 7 on the outside, as shown in
- Fig. 3 In doing this, every other fold line 5 is provided on the inside and every other fold line 7 is provided on the outside by high-frequency welding, a positive elec ⁇ trode being placed on the side of the blank 2 where the fold line 5, 7 is to be provided, and a negative electrode being placed on the other side of the blank 2. High-fre ⁇ quency voltage is generated between the electrodes, and the material in the blank is heated and deformed so as to form a fold line 5, 7. Then, the blank 2 is folded along the fold lines 5, 7, resulting in a body 15, i.e. a folded blank, as shown in Fig. 4. The body 15 is cut at both ends at an angle of 45° to the short sides, as illustrated by the dashed lines in Fig.
- the blank 2 is extended and now presents saw-tooth long- side edges 3, where the first set of fold lines 5 extend between opposite crests 6 of the saw-tooth long-side edges 3, and the second set of fold lines 7 extend between oppo ⁇ site troughs 8 of the saw-tooth long-side edges 3. All the blanks 2 are interconnected as shown in Fig. 5 so as to form a tubular unit, i.e. a bellows. The blanks then are arranged in pairs, applied against one another and inter ⁇ connected by high-frequency welding along one long-side edge 3. It goes without saying that various modifications of the inventive bellows and the inventive method are conceivable within the scope of the invention as defined i the appended claims.
- the fold lines may be provided by any optional method.
- PVC polyurethane or some other suitable material may be used, depending, inter alia, on the interconnecting technique.
- the flange at the upper end of the bellows may be optionally positioned on the uppermost fold portion, e.g. at the outer or the inne periphery. Both the flange and the channel may be provide at one or both ends of each blank.
- the blanks may have optional shape, such as triangular, ellipsoidal or irregular.
- saw-tooth relates not only to the symmetrical shape in the illustrated embodiment, but also to any regular or irregular shape presenting crests and troughs.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92921644A EP0607285A1 (en) | 1991-10-10 | 1992-10-08 | Protective bellows and method for making the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9102927A SE469192B (en) | 1991-10-10 | 1991-10-10 | SAFETY BELOW AND WERE MADE TO MANUFACTURE IT |
SE9102927-2 | 1991-10-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993007406A1 true WO1993007406A1 (en) | 1993-04-15 |
Family
ID=20383951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1992/000706 WO1993007406A1 (en) | 1991-10-10 | 1992-10-08 | Protective bellows and method for making the same |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0607285A1 (en) |
AU (1) | AU2788392A (en) |
SE (1) | SE469192B (en) |
WO (1) | WO1993007406A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2806145A1 (en) * | 2000-03-10 | 2001-09-14 | Ge Med Sys Global Tech Co Llc | Coupling for two caps having relative movement e.g. in radiology equipment comprises hollow supple sleeve jointed to apertures in caps |
WO2003028948A1 (en) * | 2001-10-03 | 2003-04-10 | A & A Mfg. Co., Inc. | Bellows with molded panels |
FR2966545A1 (en) * | 2010-10-20 | 2012-04-27 | Groupe Contino | Bellows for protecting lower part of driver seat in e.g. lorry, has panels whose edges are fixed in pairs, where bellows are formed from plastic-coated fabric, and fixation between panels has wavy shape having number of troughs and crests |
CN110757337A (en) * | 2019-10-25 | 2020-02-07 | 白建 | Cooling device is used in aluminum alloy production with hydrologic cycle function |
CN112096999A (en) * | 2020-08-19 | 2020-12-18 | 武汉东研装备科技有限公司 | All-metal compensator for drying furnace |
CN114952322A (en) * | 2022-06-08 | 2022-08-30 | 扬州力创机床有限公司 | High-precision high-reliability numerical control machine tool convenient for complex profile machining |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE485172C (en) * | 1928-03-16 | 1929-10-28 | Carl Neithold A G | Photographic bellows camera |
DE498330C (en) * | 1930-05-21 | August Nagel Dr | Bellows for photographic apparatus | |
DE1251650B (en) * | 1967-10-05 | |||
DE3027083A1 (en) * | 1980-07-17 | 1982-02-11 | Möller Werke GmbH, 4800 Bielefeld | Bellows or concertina-type cover - is for sliding tracks in machines and includes pleat collection lamellae, flexible parallel to retraction direction |
DE3532702A1 (en) * | 1985-09-13 | 1987-03-26 | Arnold Arno Gmbh & Co | Bellows for covering machine parts |
-
1991
- 1991-10-10 SE SE9102927A patent/SE469192B/en not_active IP Right Cessation
-
1992
- 1992-10-08 AU AU27883/92A patent/AU2788392A/en not_active Abandoned
- 1992-10-08 EP EP92921644A patent/EP0607285A1/en not_active Withdrawn
- 1992-10-08 WO PCT/SE1992/000706 patent/WO1993007406A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE498330C (en) * | 1930-05-21 | August Nagel Dr | Bellows for photographic apparatus | |
DE1251650B (en) * | 1967-10-05 | |||
DE485172C (en) * | 1928-03-16 | 1929-10-28 | Carl Neithold A G | Photographic bellows camera |
DE3027083A1 (en) * | 1980-07-17 | 1982-02-11 | Möller Werke GmbH, 4800 Bielefeld | Bellows or concertina-type cover - is for sliding tracks in machines and includes pleat collection lamellae, flexible parallel to retraction direction |
DE3532702A1 (en) * | 1985-09-13 | 1987-03-26 | Arnold Arno Gmbh & Co | Bellows for covering machine parts |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2806145A1 (en) * | 2000-03-10 | 2001-09-14 | Ge Med Sys Global Tech Co Llc | Coupling for two caps having relative movement e.g. in radiology equipment comprises hollow supple sleeve jointed to apertures in caps |
WO2003028948A1 (en) * | 2001-10-03 | 2003-04-10 | A & A Mfg. Co., Inc. | Bellows with molded panels |
US6986938B2 (en) | 2001-10-03 | 2006-01-17 | A & A Manufacturing Co., Inc. | Bellows with molded panels |
US7297392B2 (en) | 2001-10-03 | 2007-11-20 | A & A Mfg. Co., Inc. | Bellows with molded panels |
FR2966545A1 (en) * | 2010-10-20 | 2012-04-27 | Groupe Contino | Bellows for protecting lower part of driver seat in e.g. lorry, has panels whose edges are fixed in pairs, where bellows are formed from plastic-coated fabric, and fixation between panels has wavy shape having number of troughs and crests |
CN110757337A (en) * | 2019-10-25 | 2020-02-07 | 白建 | Cooling device is used in aluminum alloy production with hydrologic cycle function |
CN112096999A (en) * | 2020-08-19 | 2020-12-18 | 武汉东研装备科技有限公司 | All-metal compensator for drying furnace |
CN114952322A (en) * | 2022-06-08 | 2022-08-30 | 扬州力创机床有限公司 | High-precision high-reliability numerical control machine tool convenient for complex profile machining |
CN114952322B (en) * | 2022-06-08 | 2024-02-02 | 扬州力创机床有限公司 | High-precision high-reliability numerical control machine tool convenient for complex profile machining |
Also Published As
Publication number | Publication date |
---|---|
SE9102927D0 (en) | 1991-10-10 |
EP0607285A1 (en) | 1994-07-27 |
AU2788392A (en) | 1993-05-03 |
SE9102927L (en) | 1993-04-11 |
SE469192B (en) | 1993-05-24 |
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