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WO2001003862A1 - Dispositif de fixation pour tirant - Google Patents

Dispositif de fixation pour tirant Download PDF

Info

Publication number
WO2001003862A1
WO2001003862A1 PCT/EP2000/006565 EP0006565W WO0103862A1 WO 2001003862 A1 WO2001003862 A1 WO 2001003862A1 EP 0006565 W EP0006565 W EP 0006565W WO 0103862 A1 WO0103862 A1 WO 0103862A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
tie rod
machine frame
clamping device
transverse 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.)
Ceased
Application number
PCT/EP2000/006565
Other languages
German (de)
English (en)
Inventor
Jürgen Heinrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LANGERFELD BIRGIT
SCHMAKEIT RENATE
Original Assignee
LANGERFELD BIRGIT
SCHMAKEIT RENATE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LANGERFELD BIRGIT, SCHMAKEIT RENATE filed Critical LANGERFELD BIRGIT
Publication of WO2001003862A1 publication Critical patent/WO2001003862A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/145—Assembling elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
    • B21B43/02—Cooling beds comprising rakes racks, walking beams or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C19/00—Components or accessories for moulding machines

Definitions

  • the present invention relates to a tensioning device for a tie rod according to the preamble of the main claim.
  • Such a clamping device is known for a special application for fastening a wear strip on the base rail of a step conveyor for transporting a sand-filled molding box in a metal foundry.
  • step conveyors of this type the wear strip is fastened to a base element, the base element being driven by a motor in order to gradually advance the molding box placed thereon.
  • a special feature of this exemplary embodiment provides for a large number of base elements arranged next to one another with small spacings, of which the first, third, fifth, etc., or the second, fourth, sixth, etc., are shifted alternately forward in groups, so that a total of one quasi continuous funding process arises.
  • the latter step conveyors have a basic need for good accessibility in order to be able to replace the cover elements from time to time due to wear. Since the base elements are often only accessible from the side, given the small distances between adjacent base elements, a considerable amount of assembly work is required to replace the cover elements.
  • the advantage of the invention is that, while maintaining compatibility with the systems known per se, a pairing of tie rod and tensioning element is provided, with which the cover element can be quickly and sensitively braced on the machine frame even if the free head of the tie rod is only accessible from the side can.
  • the tie rod has a clamping surface and on the other hand the clamping element has a ramp surface which is supported on the clamping surface.
  • the tie rod and tensioning element are preferably perpendicular, but at least transversely to one another, so that the tensioning surface and the ramp surface form a positive-locking mechanism.
  • the function of the positive locking mechanism is based on a transmission-like implementation of the movement of the tensioning element, for example rotary movement, longitudinal movement in the direction of the cover element, or rotary movement (in particular claim 2), longitudinal movement in the direction of the tie rod (in particular claim 3) into a longitudinal movement of the tie rod in Direction away from the cover element.
  • the invention In order to be able to apply the invention to the conveying apparatuses of different manufacturers mentioned at the outset, it is additionally proposed to provide an intermediate strip between the base element and the cover element.
  • the function of the intermediate strip is based on the inclusion of the cross bores necessary for the invention.
  • the intermediate strip is firmly anchored to the base element or to the machine frame.
  • the basic idea of the invention is therefore based on the consideration that the intersecting longitudinal lines of the tensioning element or tie rod, that is to say the direction of the tensile force in the vicinity of the crossing point, enable a pairing of the tensioning surface and the ramp surface on which the movement of the tie rod, for example rotational movement or longitudinal movement in the direction of the cover element or the longitudinally guided movement of the tensioning element oriented in the direction of the tie rod is converted into a tightening force in the tie rod which is oriented starting from the cover element in the direction of the machine frame.
  • the cover element is thus pulled sufficiently strongly against the machine frame / the base element / the intermediate strip even with slight movement, for example rotary or longitudinal movement in the direction of the cover element or inward movement of the clamping element in the direction of the tie rod bore.
  • this form-fitting package can be easily and easily taken apart at any time, e.g. if the cover elements would have to be replaced due to advanced wear.
  • the screw head represents a thickening with regard to the contour of the screw shaft.
  • the underside of the screw head facing the screw tip can expediently be used as a clamping surface on which the contact surface of the clamping element engages ,
  • Another exemplary embodiment provides a recess provided transversely in the screw shaft as a clamping surface, which is aligned essentially parallel to the transverse bore.
  • the clamping element would run up with its contact surface in the recess and thus transmit the required longitudinal force into the tie rod.
  • a particularly effective positive-locking gearbox is achieved by pairing the clamping surface and the ramp surface, which is on the bisector between the Longitudinal axis of the tie rod and the longitudinal axis of the transverse bore.
  • the tie rod bore and the transverse bore are expediently perpendicular to one another, so that the clamping surface is inclined at 45 ° to the longitudinal axis of the tie rod and the contact surface is inclined at 45 ° to the longitudinal axis of the clamping element.
  • This bisector of the angle lies on the side of the tie rod facing the tensioning element in the angular range that is spanned between the free end of the tie rod and the approaching tensioning element.
  • the clamping element can be braced within the transverse bore in various ways.
  • a plug pin is conceivable, which sits in a through hole extending through the machine frame / the base element and carries a screw thread at its preceding end, which corresponds to the thread of a corresponding screw nut.
  • the tip of the tensioning element would be expediently beveled conically and the tensioning element would only have to be screwed into the transverse bore from one side until its conically beveled tip was in a corresponding position. accordingly undercut area of the tie rod runs on.
  • tensioning element is additionally designed as a thread, the advantage results that the tensioning element can be implemented over the machine frame / the base element without lateral protrusion.
  • the tie rod can be designed as an Allen screw, the screw head of which is longitudinally guided in the tie rod bore and which is beveled conically on its underside.
  • This exemplary embodiment offers the advantage of a mechanically extremely stable tie rod, since such Allen screws have high strength classes.
  • Fig. 4 Detailed view of tie rod and tensioning element, each of standard parts,
  • FIG.5a / b / c block diagram of another embodiment
  • Fig.l shows a step conveyor 100 to which the invention is applicable.
  • Such a step conveyor consists of kinematically coupled basic elements of groups 101 and 102, hereinafter also referred to as machine frames.
  • the basic elements of group 101 or group 102 alternately perform a drive movement symbolically represented by 104.
  • the base elements are then raised in groups and conveyed forward on a closed path until they then dip below the base plane spanned by the base elements of groups 101 and 102 in order to return to the starting position below the base level.
  • Each base element 101 or 102 is provided with a cover element 105.
  • the top of all cover elements must be in a common zero level so that the wear behavior of all cover elements is the same.
  • FIG. 2 shows an exemplary embodiment in which the machine frame 101 or 102 has a double intermediate strip 106, which in turn is rigidly connected to the machine frame.
  • the fastenings 107 which brace the doubled intermediate strip 106 to form a tight contact joint 6 against the machine frame 101 or 102, serve this purpose.
  • the intermediate bar has countersunk holes, which are used to hold screw heads.
  • the depth of the countersink is selected such that the fastening screws 107 do not protrude above the contact joint 5 between the cover element 105 and the doubled intermediate strip 106.
  • this contact joint can also be hermetically sealed against the environment.
  • Clamping devices 110 are used to fasten the cover element 105 to the base element 101 (102) or to the intermediate bar 106, which will now be discussed in more detail.
  • Such tensioning devices 110 comprise a tie rod 1, which is screwed into a blind threaded hole 2 with a screw-in tip 3.
  • the blind threaded hole 2 is located on the underside of the cover element 105 and is only accessible from the underside. Because of the considerable abrasive wear on the upper side of the cover elements 105, only a clamping device 110 is considered for this application, which is hermetically sealed against the abrasive effects.
  • the tie rod 1 is anchored to the cover element 105 in a pull-out manner.
  • the free end of the tie rod 1 extends into a tie rod bore 7 of the machine frame.
  • the tie rod 1 therefore extends with its anchor shaft 3a within the tie rod bore 7 at least until it has reached the penetration space 9, which is spanned between the tie rod bore 7 and a cutting transverse bore 8.
  • the transverse bore 8 runs transversely to the base element 101 and essentially parallel to the contact surface between the underside of the cover element and top of the machine frame.
  • the transverse bore 8 cuts the tie rod bore such that a tensioning element introduced into the transverse bore inevitably strikes the tie rod, as soon as the clamping element 10 has been inserted sufficiently far into the transverse bore 8.
  • tensioning elements serve primarily to apply a predeterminable longitudinal force 16 to the tie rod 1, so that the cover element 105 is pulled at least locally in the area of the tie rod 1 against the base element 1 or the intermediate bar 106.
  • the tie rod 1 in the intersection of the transverse bore 8 with the tie rod bore 7, that is to say in the area of the penetration space 9, has a clamping surface 11 with which a clamping element 10, which is longitudinally guided in the transverse bore 8, forms a positive locking gear 14 via an associated ramp surface 13 in such a way that that with increasing inward movement 15 of the tensioning element, a growing longitudinal force 16 arises in the tie rod 1.
  • cover element 105 In order to achieve the most uniform possible surface pressure between cover element 105 and base element 101 or 102 or intermediate strip 106 in the present application, a large number of such clamping devices are arranged distributed over the length of the cover element 105.
  • the number required in each case is to be determined with regard to the structural requirements and should at least be so large that the cover elements 105 are not subject to any distortions even under any thermal influences.
  • Figures 2 to 4 show that the clamping surface 11 is provided on a thickening 17 of the anchor shaft 3a.
  • the thickening creates an undercut zone of the tie rod in the lower region of the transverse bore 8, which is particularly suitable for application with the tensioning element 10.
  • the clamping surface 11 is formed in a longitudinal recess in the anchor shaft 3a, which has to be set practically coaxially with the longitudinal direction 12a of the transverse bore 8.
  • FIGS. 3 and 4 show that the clamping surface 11 and the run-up surface 13 lie on the bisector 18 which extends between the longitudinal axis 12b of the tie rod and the longitudinal direction 12a of the transverse bore.
  • This bisector lies in the quadrant which is spanned by the free end of the tie rod 1 and that longitudinal region of the tensioning element 10 which approaches the tie rod when the tensioning element 10 moves inward. It has proven to be extremely expedient to design the clamping surface 11 and likewise the run-on surface 13 each with conical regions 19 on the tie rod 1 or 20 on the clamping element 10. If the conical areas 19 and 20 each have conical angles of 45 °, provided that the longitudinal direction 12a of the transverse bore and the longitudinal axis 12b of the tie rod intersect at a right angle, this is due to the relatively rare need for replacement the cover strips 105 provided a practically wear-free tensioning device.
  • tie rods are formed by Allen screws that belong to strength class 10.8 or better.
  • the tie rod 1 is formed there by an Allen screw 26.
  • the underside 27 of the screw head is chamfered here with a cone angle 21 which is inclined at 45 ° to the longitudinal axis 12b of the tie rod 1.
  • the tip of the tensioning element 10 is chamfered at the same angle, measured in relation to the longitudinal direction 12a of the transverse bore, in order to achieve a contact area in the positive-locking gear 14 that is as wear-free or wear-free as possible.
  • FIGS. 2 to 4 show clamping elements 10 which are made in one piece as screw bolts.
  • each clamping element has an external thread 24, which is screwed into a corresponding internal thread 23 of the transverse bore 8.
  • each clamping element 10 has a screw drive 25 which can be easily moved from the side of the machine frame.
  • mens 101, 102 or 106 is accessible, is at least also accessible taking into account the distance 103 between the above-mentioned basic elements.
  • each clamping element 10 is formed by a threaded pin, which has an external thread 24 running over the entire length, so that the threaded pin completely disappears within the transverse bore 8. Nevertheless, the grub screw remains accessible from the outside via the screw drive 25 on the end face.
  • the ramp surface according to the invention can be easily realized by conically chamfering the tip of the threaded pin.
  • the tie rod 1 is longitudinally guided with its anchor head in the tie rod bore 7. This means that the tie rod head cannot deflect laterally even with increasing tightening torque which is introduced into the tensioning elements 10, since it is led through direct contact to the wall of the tie rod bore 7. In this way, unwanted tensions, deformations or unwanted stress profiles in the cover element 105 can be reliably avoided.
  • FIGS. 5a to 5c and 6a and b show two exemplary embodiments in which the clamping principle of this invention is fulfilled by a differently designed clamping element.
  • the cover strip 105 can be seen in the schematic representations. Attached to this in a tie rod 1 in the form of a vertically protruding strip. It exerts a pulling force in direction 4 on the cover strip. As a result, the cover strip is in contact with the end faces of the side flanks U-shaped machine frame 101 pressed.
  • the tensioning device provided for applying the tensile force is constructed as follows:
  • the U-flanks of the machine frame are penetrated by aligned circular cylindrical holes / hole in the machine room / bearing holes / cross holes 8.
  • the bar of the tie rod is penetrated by a circular cylindrical hole, hole 113.
  • Cross bore 8 and bore 113 are essentially aligned, however the diameter of bore 113 in the tie rod is larger than that of hole 8.
  • a clamping element 10 in the form of a more or less flat strip is pushed through the bore and cross bore.
  • the bar is asymmetrical in the circumferential direction.
  • the bar adapts as well as possible to the circumference of the cross bores in the machine frame so that it can be turned easily.
  • the clamping element can also be flattened on one side only, but on the other side adapted to the circumference of the transverse bore.
  • the tensioning element can now be rotated by a suitable tool 112 which acts laterally. This changes the vertical spacing component of the two end-side surface areas of the tensioning element, which slide on the circumference of the transverse bores.
  • the tensioning element is still supported on the upper circumferential area of the cross bores, so that this circumferential area serves as a support surface for receiving the tensile force exerted on the tie rod in the direction 4.
  • the tensioning element is increasingly supported on the lower circumferential region of the hole 113 in the tie rod, so that this circumferential region acts as a run-up surface 13 on which a tensile force increases with the rotation of the tensioning element in the direction 4 on the tensile anchor is exercised.
  • the clamping element can also perform a clamping movement in the direction parallel to the flanks of the machine frame.
  • the U-frame of the machine frame and the tie rods have holes 8, 113 which intersect at a slight inclination angle alpha to the horizontal H.
  • the clamping element in the form of a bolt or a bar is inserted in the area of the overlap.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un dispositif de fixation pour tirant, destiné à la fixation d'un élément de protection sur un bâti de machine, dans lequel le tirant présente, dans un espace de pénétration (9) avec trou transversal, situé à l'intérieur du bâti, une surface de fixation sur laquelle un élément de serrage guidé longitudinalement dans le trou transversal coulisse sur une surface de glissement associée et forme une transmission à liaison de forme qui génère une force longitudinale croissante dans le tirant au fur et à mesure que l'élément de serrage se déplace vers l'intérieur.
PCT/EP2000/006565 1999-07-08 2000-07-10 Dispositif de fixation pour tirant Ceased WO2001003862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999131682 DE19931682A1 (de) 1999-07-08 1999-07-08 Spannvorrichtung für einen Zuganker
DE19931682.1 1999-07-08

Publications (1)

Publication Number Publication Date
WO2001003862A1 true WO2001003862A1 (fr) 2001-01-18

Family

ID=7913984

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/006565 Ceased WO2001003862A1 (fr) 1999-07-08 2000-07-10 Dispositif de fixation pour tirant

Country Status (2)

Country Link
DE (1) DE19931682A1 (fr)
WO (1) WO2001003862A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1581477A (fr) * 1968-02-27 1969-09-19
DE3240499A1 (de) * 1981-11-06 1983-05-19 Josef Wien Orlik Aufspannvorrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1581477A (fr) * 1968-02-27 1969-09-19
DE3240499A1 (de) * 1981-11-06 1983-05-19 Josef Wien Orlik Aufspannvorrichtung

Also Published As

Publication number Publication date
DE19931682A1 (de) 2001-04-05

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