EP0070400B1 - Etau - Google Patents
Etau Download PDFInfo
- Publication number
- EP0070400B1 EP0070400B1 EP82105440A EP82105440A EP0070400B1 EP 0070400 B1 EP0070400 B1 EP 0070400B1 EP 82105440 A EP82105440 A EP 82105440A EP 82105440 A EP82105440 A EP 82105440A EP 0070400 B1 EP0070400 B1 EP 0070400B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet metal
- metal member
- shoes
- clamp
- cap
- 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.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/16—Details, e.g. jaws, jaw attachments
- B25B5/163—Jaws or jaw attachments
Definitions
- the invention relates to a flat clamping screw clamp with a guide rail on which a fixed bracket extending transversely to it and an approximately parallel sliding bracket is slidably guided, with a nut thread for an approximately parallel to the guide rail screw in a first of the two brackets, in particular the sliding bracket, as well as with two clamping surface shoes, one of which is arranged on the second of the two brackets and the other on a plate-shaped cap, in particular rotatably mounted on the screw spindle, with mutually facing clamping surfaces and tiltable about axes perpendicular to the plane of the two brackets. Screw clamps of this type are also referred to as surface clamps.
- the clamping surface shoe which is articulated on the fixed bracket with the aid of elongated holes, has a T-profile with a longitudinally divided central web for embracing the fixed bracket, while the other clamping surface shoe has one has trough-shaped or trough-shaped shape, with the bottom of this trough rests on a plate-shaped cap rotatably mounted on the screw spindle by means of a kind of ball joint and overlaps it, and with an opening in the trough bottom on which the guide rail passing through this opening is held.
- the side walls of the trough at the transition to the trough bottom each have a longitudinal groove into which opposing edge regions of the screw spindle cap engage.
- the two clamping surface shoes are cast metal parts that still need to be reworked.
- the known screw clamp is extremely stable and robust, but also expensive to manufacture.
- the invention was therefore based on the object of changing the known surface-tensioning screw clamp while maintaining its functional properties in such a way that it can be produced more cheaply, and starting from a screw clamp of the type mentioned at the outset, this object can be achieved according to the invention in that the two clamping surface shoes have a sheet metal part and a plastic shell which accommodates the respective clamping surface and that the sheet metal part of the one clamping surface shoe has an opening for articulation on the second bracket, in particular the fixed bracket, and the sheet metal part of the other clamping surface shoe has at least one slot for inserting an edge region of the cap. While the sheet metal part at least essentially guarantees the required strength, the plastic shell allows the rake shoe to be given the desired outer shape easily and without reworking.
- the openings for articulating the one clamping surface shoe on the fixed bracket or the slot for securing the clamping surface shoe on the screw spindle cap can be made in the sheet metal part when the sheet metal parts are punched out without additional effort.
- the clamping surface shoes thus consist of a simple stamped and bent part made of sheet metal and a protective layer or a separately produced plastic part, so that the expensive and still to be reworked metal castings of the known screw clamp are eliminated.
- the sheet metal part could be inserted into a plastic injection mold and at least partially encapsulated with the material forming the plastic shell.
- the sheet metal part and the plastic shell are manufactured separately from one another and are designed such that the plastic shell can be pushed onto the sheet metal part.
- Such a plastic shell can then also be secured to the sheet metal part by a simple snap or snap connection.
- the clamping surfaces must have a certain minimum length, in view of the desired stability of the clamping surfaces, it is advisable to give the sheet metal part a U-shaped cross section at least over part of its length, so that the sheet metal part articulated on the second bracket encompasses this bracket and in its two side walls can be provided with holes for a hinge pin; in this embodiment, the sheet metal part side walls support the longitudinal edge regions of the clamping surfaces.
- the sheet metal part of the clamping surface shoe to be attached to the screw cap is also given a U-shaped cross section over at least part of its length for reasons of stability, it is advisable to insert the sheet metal part side walls at the transition to the bottom of the sheet metal part with unevenly long slots parallel to the latter to provide opposite edge regions of the cap, the latter being secured in the slots by the plastic shell.
- the length of these slots is dimensioned so that the screw cap can be pushed into the longer slot when attaching the sheet metal part to the screw spindle until it can be placed against the bottom of the sheet metal part, whereupon the edge of the cap is also pushed into the other slot and that The sheet metal part is secured to the cap by placing the plastic shell on the sheet metal part.
- the invention enables the two clamping surface shoes to be designed identically, as in a particularly preferred embodiment, since it causes no additional costs when punching the sheet metal parts, both the holes for articulating a raft shoe on the stirrup as well produce the slots for mounting the other clamping surface shoe on the screw spindle cap, so that one and the same sheet metal part can be used for both clamping surface shoes, and the plastic shell can also be easily designed so that it is suitable for both clamping surface shoes.
- these spacing ribs are formed on the inside of the side walls of the plastic shell to form lateral spaces between the sheet metal part and the plastic shell, so that the ends of the pivot bolt forming these bevels or crests can protrude into these intermediate spaces and strictly cylindrical regions of the pivot bolt rest against the sheet metal part.
- the usual ball joint-like connection between the screw spindle and the screw spindle cap allows the clamping surface shoe attached to the latter to be tilted, for example in order to be able to clamp workpieces with a wedge-like cross-section flat.
- the screw clamp shown in Fig. 1 consists of a guide rail 10, on which a fixed bracket 12 is integrally formed in the usual manner, as well as a sliding bracket 14 which is also longitudinally displaceably guided on the guide rail 10 and has a nut thread in its free end for one with a handle 18 and a cap 20 provided screw spindle 16.
- the screw spindle 16 has at the top a ball head, not shown in FIG. 1, which the cap 20 engages in a form-fitting manner, so that it is connected to the screw spindle 16 like a ball joint.
- the screw clamp now has two identical clamping surface shoes 22 and 24, the shape and structure of which will be explained in more detail below, and the upper of which is articulated to the fixed bracket 12 with a pin 26, while the lower clamping surface shoe 24 is attached to the cap 20 in a manner to be described the screw 16 is connected. Therefore, the clamping surface shoes 22 and 24 can both be tilted to a limited extent about axes perpendicular to the drawing plane of FIG. 1 relative to the guide rail 10 or the fixed bracket 12 and thus adapt to the shape of objects to be clamped. It is also desirable that at least the clamping surface shoe 24 attached to the cap 20 can tilt to a limited extent around a horizontal axis lying in the drawing plane of FIG. 1 in order to be able to adapt to the workpieces to be clamped.
- each of the clamping surface shoes is a sheet metal part 30 shown in FIGS. 5 to 7, which according to the invention has an essentially U-shaped cross section with a bottom 32 and side walls 34, 36.
- the latter each have a catch 38 at the front and a slot 40 or 42 at the transition to the floor 32, these slots being of unequal length, as can be seen in FIG. 6.
- the shorter of the two slots, namely the slots 42 is just long enough that when the cap 20 rests on the bottom 32, the edge of the slot 20 is inserted into the slot 42 can be pushed that it is flush with the outside of the sheet metal part 30 or protrudes only slightly above this.
- the slot 40 is chosen so long that the cap 20 according to FIG.
- the cap 5 is inserted obliquely from above between the side walls 34, 36 and then can be inserted into the slot 40 so far that the opposite edge region of the cap 20 of the side wall 36 can be lowered along to the level of the slot 42; by pushing the edge region of the cap 20 into the slot 42, the cap can then be brought into the position shown in broken lines in FIG. 6.
- the height of the slots 40 and 42 corresponds to the thickness of the edge region of the cap 20 or is slightly larger than the cap thickness.
- the bottom of the sheet metal part 30 has a cutout 44 for pushing the clamping surface shoes onto the guide rail 10, as can be seen in FIG. 1.
- 30 ribs 46 are bent up from the bottom 32 of the sheet metal part and bear against the side surfaces of the guide rail 10.
- the side walls 34 and 36 of the sheet metal part 30 taper in the direction of the guide rail in order to allow the lower clamping surface shoe 24 to tilt relatively strongly despite the sliding bracket 14 (see FIG. 1).
- a plastic shell 50 shown in FIGS. 8 to 11 gives the clamping surface shoes 22, 24 the desired outer shape; Of course, it can also take on a supporting role in some cases.
- this plastic shell also has a U-shaped cross section over its entire length with a bottom 52 and side walls 54, 56, but the U profile is closed at the front by an end wall 58 and at the top by a wall 60.
- the plastic shell 50 is expediently an injection molded part.
- the bottom 52 of the plastic shell 50 also has a cutout 62 for partially enclosing the guide rail 10 in a fork-like manner, and in order to position the plastic shell and thus the relevant clamping surface shoe in the front region of the fixed bracket 12 in the desired manner in the transverse direction relative to the latter, molded ribs 64 are to be used provided that bear against the side surfaces of the fixed bracket 12. These ribs extend so far in the direction of the cutout 62 that, taking into account the diameter of the cap 20, they can also center the clamping surface shoe 24 on the cap. That is why they are also beveled at the front (see Figure 9). Finally, according to the invention, spacing ribs 66 are formed on the inside of the side walls 54, 56.
- the wall 60 has a cutout 68 for the passage of the screw spindle 16 in the case of the lower clamping surface shoe 24 (see FIG. 1).
- the plastic shells 50 of the two clamping surface shoes also form the clamping surfaces 70.
- the side walls 54 and 56 taper in the direction of the cutout 62 in the same way as the side walls 34 and 36 of the sheet metal part 30, so as not to hinder the tilting of the clamping surface shoe.
- the plastic shell 50 can be pushed onto the sheet metal part in the longitudinal direction from the front (see arrows A in FIGS. 5 and 8) until the catches 38 of the sheet metal part snap into corresponding recesses 72 in the front area of the plastic shell 50.
- the sheet metal part 30 is then caught between the bottom 52, the side walls 54 and 56 and the upper wall 60 of the plastic shell 50 and is secured against displacement in the longitudinal direction by the end wall 58 and the latching connection 38, 72.
- the clamping surface shoes 22, 24 are assembled only after the sheet metal parts 30 have been attached to the fixed bracket 12 or the cap 20. For this purpose, in the case of the upper clamping surface shoe 22, the sheet metal part 30 is pushed onto the fixed bracket 12, as can be seen in FIGS.
- the side walls 54 and 56 of the plastic shell 50 then secure the cap 20 in the slots 40, 42 of the sheet metal part 30, since the side walls of the plastic shell 50 no longer allow the cap 20 to be pushed further into the slot 49 according to FIG. 6, so that it could leave slot 42.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Wire Bonding (AREA)
- Clamps And Clips (AREA)
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82105440T ATE18520T1 (de) | 1981-07-16 | 1982-06-22 | Schraubzwinge. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3128023 | 1981-07-16 | ||
DE19813128023 DE3128023A1 (de) | 1981-07-16 | 1981-07-16 | "schraubzwinge" |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0070400A2 EP0070400A2 (fr) | 1983-01-26 |
EP0070400A3 EP0070400A3 (en) | 1984-01-18 |
EP0070400B1 true EP0070400B1 (fr) | 1986-03-12 |
Family
ID=6136996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82105440A Expired EP0070400B1 (fr) | 1981-07-16 | 1982-06-22 | Etau |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0070400B1 (fr) |
AT (1) | ATE18520T1 (fr) |
DE (2) | DE3128023A1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3308199A1 (de) * | 1983-03-08 | 1984-09-13 | Heinz Markus GmbH, 5630 Remscheid | Schraubzwinge |
GB2167996A (en) * | 1984-12-10 | 1986-06-11 | Norman Griset | Guide clamp |
DE3700955A1 (de) * | 1986-01-17 | 1987-07-23 | Bessey & Sohn | Beilageschiene |
DE8615005U1 (de) * | 1986-06-04 | 1986-07-24 | Bessey & Sohn GmbH & Co, 7120 Bietigheim-Bissingen | Schraubzwinge |
DE19755909A1 (de) * | 1997-12-10 | 1999-06-17 | Gotthard Bresch | Sich selbst haltende, flexible, variable Zwischeneinlage zwischen Schraubzwingendruckfläche und Werkstück |
DE10158005B4 (de) | 2001-11-22 | 2016-05-19 | Bessey Tool Gmbh & Co. Kg | Bügelzwinge |
DE102007032146A1 (de) * | 2007-07-04 | 2009-01-08 | Bessey Tool Gmbh & Co. Kg | Zwinge und Verfahren zur Herstellung einer Zwinge |
CA2618459C (fr) | 2007-07-26 | 2015-10-06 | Bessey Tool Gmbh & Co. Kg | Pince |
DE102007039841B3 (de) | 2007-08-16 | 2008-09-18 | Bessey Tool Gmbh & Co. Kg | Zwinge und Verfahren zur Herstellung einer Zwinge |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1255056B (de) * | 1963-08-05 | 1967-11-23 | Hulda Erna Mayer Geb Moosmann | Spannzwinge |
DE2539613A1 (de) * | 1975-09-05 | 1977-03-10 | Bessey & Sohn | Spannvorrichtung zum festspannen von werkstuecken |
DE2737904A1 (de) * | 1977-08-23 | 1979-03-08 | Bessey & Sohn | Schraubzwinge |
DE2844838A1 (de) * | 1978-10-14 | 1980-04-24 | Bessey & Sohn | Schraubzwinge |
-
1981
- 1981-07-16 DE DE19813128023 patent/DE3128023A1/de not_active Withdrawn
-
1982
- 1982-06-22 AT AT82105440T patent/ATE18520T1/de not_active IP Right Cessation
- 1982-06-22 EP EP82105440A patent/EP0070400B1/fr not_active Expired
- 1982-06-22 DE DE8282105440T patent/DE3269799D1/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3269799D1 (en) | 1986-04-17 |
EP0070400A3 (en) | 1984-01-18 |
EP0070400A2 (fr) | 1983-01-26 |
ATE18520T1 (de) | 1986-03-15 |
DE3128023A1 (de) | 1983-02-03 |
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