DE7016994U - MAGNETIC BEAM FOR LIFTING IRON RODS. - Google Patents

Description

description to the utility model application

the company U. Nielsen t SfJn Maskinfabrik A / S, Htfrkaer, 2730

Herlev / Austria

concerning:

* Magnetic support beam for lifting iron bars'

The innovation concerns a magnetic support beam for lifting of iron bars, e.g. profile iron with an upper chord and a lower chord, which are connected to one another by side trusses to form a truss, under which a number of elongated, is attached to a narrow electromagnet, each wear end pegs at their ends and with the help of ropes or loops attached to the end pegs in the truss attached spring suspension members are vertically slidably suspended and with the help of a length of the truss extending and therein mounted in fixed bearings shaft can be rotated.

It is from the Danish patent specification No. 111 837 a magnet support beam of this type is known, in which each magnet on one is suspended in the upper belt of the carrier mounted spring suspension member. In the spring suspension member is perpendicular and a spring mounted fork that is slightly below the

7C16 994 31.5.72

Extends spring suspension member and carries two pulleys at its lower end. From the end journals of each magnet, a rope or the two ends of a loop are led up through the lower chord and further around the associated rope pulleys and then brought down for attachment to two rope pulleys attached to the shaft, which shaft is mounted in fixed bearings on the upper side of the lower chord . A major disadvantage is that the individual spring suspension elements with the associated rope pulley and the rope pulley in between take up a lot of space, since the distance between the spring suspension elements and the rope pulley is almost the same as the distance between the upper and lower chords. A second major disadvantage is that if loops of the same length are used for the individual magnets of the magnetic support beam, the arrangement of the spring suspension elements in the top chord in the case of the known magnetic support bar means that the top chord is designed to accommodate these organs and should run parallel to the lower chord which, when suspended from a hoist from the magnet support beam at its center, results in a construction with an unnecessarily large height at the outer ends of the magnet support beam.

The task of the innovation is to provide a magnetic support beam of the type mentioned with a simple and cheap suspension to create the magnets on the truss.

According to the innovation, this task is solved by that the spring suspension members are mounted on the shaft provided for rotating the magnets.

With this design, each loop can be carried up by its magnet to fasten it to the associated spring suspension element and thus be mechanically connected directly to the shaft provided for rotating the magnets without the use of an additional

chen loop length between the spring suspension member and the shaft. Since the spring suspension element is on the shaft and not in attached to the top chord of the truss can be the same, depending on the number and placement of the suspension points of the truss on a hoist, received suitable training, e.g. with a horizontal central belt and on both sides of which straight, sloping end straps. It is thus a simple and inexpensive suspension of the magnets on the Truss reached.

One embodiment of the magnetic support beam is according to the innovation characterized in that each spring suspension element is a two-part rope pulley element rotatable relative to the shaft which is mounted on a sliding bushing which is axially displaceable to the shaft and which is arranged coaxially therewith Compression spring is influenced.

The arrangement can be made so that the Rope pulley member comprises a first and a second pulley nut, which are side by side with an interposed sliding washer and which are arranged rotatably relative to one another and have opposing internal threads which have the same thread diameter and pitch angle, and that the sliding bush interacting with the pulley nuts on the outside having first and second threaded pieces, which are threaded corresponding to the first and second pulley nuts, respectively and are attached at a distance from each other. What is achieved hereby is a pure rotation of the one pulley nut in relation to the shaft, smooth rotation by unwinding the winding of the one on the pulley nut Loop piece is generated by engaging between the internal helical thread of the pulley and the corresponding threaded piece The sliding bush leads to a purely axial movement of the sliding bush on the shaft. The second threaded piece on the sliding

socket is characterized by its axial loading., -.,> ng with a helical thread the other rope nut engaged, making a rhyme-rotation in the opposite direction to the rotation of the ers. mentioned Pulley nut executes, because the two pulley nuts and the two threaded pieces have opposite threads. Since these threads have the same pitch angle, the pulley nuts are the same size on each side Rotate amount so that the drooping pieces of loop are equal be unwound or wound up a lot.

The sliding washer is expediently made of nylon with a cast Molybdenum disulfide produced. This creates a sliding washer chosen with good lubricating properties, so that the friction between the two mutually rotatable pulley nuts is reduced to a great extent.

The angle of inclination can be 45 °, for example. This results in a correspondingly large displacement of the sliding bush and the same Efficiency for movement in both directions.

The support beam can be designed so that the pulley nuts each with a known groove for a Rope or a loop are provided, and that the bottom of these grooves each has a center distance that is approximately equal to The radius of the end journals of the individual magnets is. This ensures that the angle of rotation of the pulley nuts and thus of the shaft is equal to the angle of rotation of the magnets, which simplifies the operation of the magnet support beam. Furthermore, it is achieved that the pieces of loop carried up by the end pins of the magnets are parallel and perpendicular to the top and bottom the lower chord attached, not inclined guide tubes can be performed, which the assembly of the guide tubes relieved in the lower chord.

In order for the pressure to be transmitted from the sliding bush a correspondingly large surface area for the end turn of the Compression spring is available, and the surface pressure on this end is as small as possible, one can proceed in such a way that between an axially displaceable spring ring with a diameter and a ring width corresponding to the sliding bush and the compression spring the diameter and the width of the massive spring cross-section of the compression spring is arranged.

A preferred embodiment of the magnetic support beam is characterized according to the innovation in that between the Shaft on the one hand and the sliding bush, the spring washer and the compression spring on the other hand a tubular fixed on the shaft Hub is arranged. The outer surface of this hub is used as a bearing for the three axially displaceable elements mentioned used.

A preferred construction provides that the hub at the end to which the pulley nuts are attached, with a stop flange is provided, which has a sliding washer rests on the end face of the outer pulley nut so that the hub has an adjusting ring at the other end, the outer end face of which is screwed onto the end of the hub Nut rests, and the inner end face rests against the end of the compression spring that faces away from the spring ring, and that A tubular sleeve surrounding the compression spring is attached between the adjusting ring and the inner rope pulley nut. It this causes a tensioning of the elements of the spring suspension member in the axial direction, so that the Rope pulley nuts cannot move in the axial direction relative to one another or to the shaft.

i Bearings over the shaft can be attached to the top of the lower chord i: e'i \ =. This provides solid support for the shaft and, since it is attached to the top of the lower chord and thus lies inside the truss, good protection of the shaft against bumps and blows.

A preferred off. ^r d: .Tungsform of the magnetic support beam is renewal in accordance characterized in that the shaft is mechanically coupled to a drive motor, eg a gear motor, of the truss girder is mounted centrally with respect to. This attachment of the drive motor in the middle of the lower chord results in only small connections at both ends of the shaft, which means that the pole pieces of the magnets are always approximately in the same plane.

The drive motor can lie above the shaft and be fastened to the lower chord with the aid of supports. By the attachment of the drive motor inside the truss, a compact design of the magnetic support beam is achieved, and the The drive motor is also protected against external knocks and shocks.

For the coupling of the drive motor irxt the shaft can a friction clutch with overload protection attached to it be provided; This prevents the drive motor from being overloaded, resulting from the lifting or turning of an iron star ge or a similar load.

It is preferably provided that an electrical limit switch is provided on the lower chord to protect against exceeding predetermined angle of rotation of the magnets, which are preferably -90 ° to the vertical plane, provided is. This limit switch will turn off the drive motor

and thus stop the shaft when the maximum rotation of the magnets exceeds the angle mentioned, and will thus prevent that the twisted iron bar, if it continues to turn against the loop pieces, will hiss the end pin of the magnets and the wave will bump.

The innovation will be described in more detail below with reference to the drawings. Show it:

Fig. 1 is a side view of an embodiment of the magnetic support beam according to the innovation with spring suspension members and electromagnets as well as a profile iron carried by these,

Fig. 2 in an enlarged scale a ^c .cnnitt according to line II-II of Fig. 1,

3 shows, on an even larger scale, a longitudinal section through a spring suspension element,

Fig. 4 is a side view of a slide bushing in the spring suspension member in Figs

FIG. 5 shows the sliding bush according to FIG. 4 in front view * - ητ.

In Fig. 1, a magnetic support beam is shown, which has a truss 1. This consists of an upper belt 2 and a lower chord 3, which are connected by two side trusses 4 are connected. As shown in FIG. 2, the upper chord 2 consists of a U-trofil flange, while the lower chord 3 consists of a rectangular profile. The truss 1 is in the middle with the help of a suspension part 5 on a hoist (not shown) hung. Below and along the half-timbered

carrier 1 is a number of elongated, narrow electromagnets 6 suspended, which, as shown in FIGS. 1 and 2, lift a profile iron 7 indicated by dash-dotted lines. Wear the magnets 6 at each of their ends end pins 8, and with the help of ropes or loops 9 attached to these end pins are the magnets Suspended on spring suspension members 10 so as to be vertically displaceable. This allows them to yield in the vertical direction Magnets 6 adjust individually to a profile iron that is not straight and wear approximately the same amount. The spring suspension members 10 are mounted on a shaft 11 which runs in the longitudinal direction of the lower chord 3 and therein is stored in fixed bearings 12. In addition to supporting the magnets 6, the shaft 11 is for rotating the same via the spring suspension members 10 and loops 9 set up. The magnets 6 are preferably connected to one another in pairs by springs 12a, to dampen possible vibrations of the magnets relative to the truss 1.

In Fig. 3 is a longitudinal section through a spring suspension member 10 is shown, which is rotatable relative to the shaft 11, having two-part pulley element 13, 14. This is mounted on a sliding bush 15 which can be axially displaced on the shaft 11, which is influenced by a compression spring 16 - / according to oak Fig. 3 is designed as a cylindrical compression spring made of round wire. The compression spring 16 is coaxial with the sliding bush 15 arranged. Between this and the compression spring 16 is an axially displaceable spring ring 17 with a diameter and a ring width approximately corresponding to the diameter and the width of the cross section of the compression spring wire attached. Through this is to transfer pressure from the sliding bush 15 a corresponding large contact surface for the end turn of the compression spring reached, so that the surface pressure of the spring ring 17 against the End turn is as small as possible.

• »left

The two-part pulley element consists of a first and a second pulley nut 13 and 14, which are located next to each other and are rotatably mounted relative to each other. This is preferably made of nylon with cast molybdenum disulfide, which gives the sliding washer a particularly low coefficient of friction. The two pulley lugs are provided with threads in opposite directions, which have the same thread diameter and pitch _{angle B 1} = ß_ (Fig. 4). The angles of inclination B ₁ and B ₂ are preferably 45 °.

The pulley nuts 13 and 14 each have a screwed-in groove 19 and 20 (FIG. 3) on their outer circumference, in each of which one end of the loop 9 lies (not shown in FIG. 3). The grooves 19 and 20 have the same cross section and the same distance from the central axis of the shaft 11. The bottoms of the grooves 19 and 20 have an axial distance which is preferably equal to the radius of the end pin 8 of the magnets 6. As indicated in Fig. 2, which shows a vertical cross section through the truss 1, the two upwardly guided loop pieces are each in a groove corresponding to a wrap angle of about 220 ° and are with their ends 9 ¹ and 9 "in a suitable manner one pulley nut 13 or 14. At the bottom of the end pin 8 of the magnet 7, the loop 9 is wrapped one and a half times around the end pin and attached to the end pin 8 along an upper loop part 9 '"with suitable tensioning elements (not shown).

In Fig «, 4 the sliding bush 15, which is made of bronze is shown in side view. It has a first threaded piece 21 and a second 22 on the outside, which threads match those of the Cable pulley nuts 13 and 14 correspond. The threaded part 21 has, for example, left-hand threads, while the threaded part 22 has right-hand threads

- 10 -

Has. The threaded pieces 21 and 22 are at a distance a (Fig. 3 and 4) attached to each other. The distance a corresponds to the greatest axial displacement by which the sliding bush 15 moves can be (to the left in FIG. 3), since the threaded piece 21 is opposite when the sliding bush 15 is moved further directed thread in the second pulley bushing 14 would encounter.

As shown in Fig. 3, the sliding bush 15, the spring ring 17 and the compression spring 16 are on a tubular hub

23 attached, which is attached to the shaft 11 with the aid of an axial tongue and groove system (not shown). The hub 23 is at the end to which the pulley nuts 13 and 14 are attached, i.e. the right end in Fig. 3, with a stop flange

24, which can be welded to the hub 23, for example. This is located with the help of an interposed sliding washer

25 on the end face of the outer pulley nut 13. To the friction between this pulley nut 13 and the stop flange To reduce 24, the sliding washer 25, like the sliding washer 18, is made of nylon with cast molybdenum disulfide. At the opposite end of the hub 23 an adjusting ring is used, the outer end face of which rests against a nut 26, which is screwed onto an external thread at the end of the hub and secured against unintentional loosening. The inner face of the adjusting ring 27 rests against the end of the compression spring 16 which faces away from the spring ring 17. Between the collar 27 and the inner rope pulley nut 14 a tubular sleeve 28 lying around the compression spring 16 is attached. Between the Sleeve 28 and the pulley nut 14, there is a small play of e.g. 0.1-0.2 mm so that the pulley nut can rotate relative to the sleeve. Through the stop flange 24 and the adjusting ring 27 at the ends of the hub 23 and the sleeve 28 it is ensured that the two pulley nuts 13 and 13 cannot move in the axial direction.

- 11 -

The sliding bush 15 is inside, as can be seen from FIG. 5, with a smooth bore 28a with an axial sliding groove 29 provided. With the aid of a corresponding axial sliding groove and sliding spring (not shown in FIG. 3) in the hub 23 sxtzt the sliding bush 15 slides axially, but non-rotatably on the hub

To secure storage of the shaft 11 in the truss 1, the bearings 12 are fastened on top of the lower chord 3, as shown in FIGS. 1 and 2. The shaft 11 is mechanical connected to a drive motor 30, e.g. a gear motor, which lies above the shaft 11 and with the aid of supports 31 is attached centrally to the lower chord. To the drive motor 30 against overload, resulting from lifting or turning the Profile iron 7 to protect is the drive motor 3O with the shaft 11 via a friction clutch 32 fitted thereon with over-etching protection coupled.

Furthermore, an electrical limit switch 33 is attached in the middle of the lower belt 3. This disconnection organ sets aen Drive motor 30 and thus the shaft 11 stop when the rotation of the magnets exceeds predetermined angles of rotation, preferably - 90 ° to the vertical plane.

The mode of operation of the spring suspension element is described below using examples.

A rotary movement of the shaft 11 is transmitted via the hub 23 and the sliding bush 15 to the pulley nuts 13 and 14, whereby the loop pieces lying in the grooves 19 and 20 and hanging down on opposite sides of the shaft 11 9 can be moved by leading one piece of loop downwards and unwinding it from one pulley nut, while the the other piece of loop upwards and on the other rope

- 12 -

raw nut is wound up. This movement of the loop pieces causes a turning of the stirrup 8 (see Fig. 2) and thus the desired turning of the individual magnets 6;

For example, when a profile iron is lifted, the individual loops 9 will generally lengthen because the shaft 11 stands still. An extension of one piece of the loop, e.g. to the first pulley nut 13, is made when it is unwound of the pulley nut 13 the same in relation to the stationary Turn shaft 11. As a result of the inclined left-hand thread of the pulley nut 13, the same will have a tendency to a screwing movement to the right in FIG. 3 if it is assumed that the piece of loop fastened to the pulley nut 13 is guided downward on the rear side of the shaft 11 in FIG. Since the Seilrol.lenmutter 13 is not displaced in the axial direction can be as it is in the lateral direction on the stop flange 25 and the other pulley nut 14 is applied, the pulley nut can do not perform the clockwise screwing movement. This screwing movement can partly be converted into a pure rotational movement in the Clockwise when viewing the shaft 11 in the direction of arrow 34, partly a purely straight-line axial movement to the right in Fig. 3 are divided. The pulley nut 13 will therefore only perform the pure rotational movement, while the sliding bush 15, which through its threaded piece 21 is in singular engagement with the internal thread of the pulley nut, a rectilinear axial movement will run by an amount to the left. The sliding bush 15 thereby presses the spring ring 17 to the left, so that the compression spring 16 changes is compressed a distance equal to the straight-line axial movement. Simultaneously with the axial movement of the sliding bush and thus the second threaded piece 22 to the left of this threaded piece 22 through its thread engagement with the inner one Right-hand threads of the second pulley nut 14 cause this pulley nut to overturn a pure rotational movement Large, but in the opposite direction relative to the first pulley nut 13, i.e. in the counter-clockwise

sense when looking at the shaft 11 in the direction of arrow 34, will perform. Since the second loop, the one on the pulley nut 14 is fixed, on the other side of the shaft 11 than the loop piece associated with the pulley nut 13 is, the second loop piece is on the front of the shaft 1.1 in Fig. 3. The rotational movement of the pulley nut 14 will therefore cause the second piece of loop to move the same amount as the first to the first pulley nut belonging piece of loop is unwound. The result will be that the two pieces of loop elongate equally will.

- Protection claims -

Claims (14)

Protection claims: 1. Magnetic support beam ^ ur. Lifting iron bars, e.g. profile iron with an upper chord and a lower chord, which are made of frameworks are connected to one another to form a truss, under which a number of elongated, narrow electromagnets are attached is, the ends of each of which carry end journals with the help of ropes or slings attached to the end journals in The spring suspension members attached to the truss are suspended vertically displaceably and with the help of a lengthwise of the truss extending shaft and mounted therein in fixed bearings can be rotated, characterized in that the spring suspension members (10) are arranged on the shaft (11) provided for rotating the magnets (6). 2. Magnetic support beam according to claim 1, characterized in that each spring suspension element (10) has a relative to the shaft (11) has rotatable, two-part rope pulley element (13, M) which is mounted on a sliding booklet (15) which is axially displaceable to the shaft, which is influenced by a compression spring (16) arranged coaxially therewith. 3. Magnetic support beam according to claim 2, characterized in that the rope pulley element (13, 14) has a first and a second rope pulley nut (13 or 14), which are next to each other with an interposed Sliding washers (18) lie and which are arranged so as to be rotatable relative to one another, as well as internal threads in opposite directions have the same thread diameter and pitch angle (ß,, ß ~), and that the ones with the pulley nuts (13, 14) cooperating sliding bush (15) on the outside a first and a second - 15 - Gev7indestück (21 or 22 ^v , each provided with a thread corresponding to the first or the second rope rail nut and attached at a distance (a) from each other. 4. magnet supporting beam according to claim 3, characterized ge ¹ annzeichnet that the sliding disk (18) is made of nylon with a casted molybdenum disulfide. 5. M & gnettragbalken according to claim 3 or 4, characterized in that the pitch angle (ß .., B ₂ ) is 45. 6. Magnetic support beam according to claims 3 to 5, characterized in that that the pulley nuts (13, 14) each with a known groove ι19, 20) for a rope or a loop (9) are provided, and dctss the bottom of these Rj? .. uen each a center distance which is approximately equal to the uaclius of the end pin (8) of the individual magnets! (6) is " 7. Magnetic support beam according to claims 2 to 6, characterized in that that between the sliding bush (15) and the compression spring (16) an axially displaceable spring ring (17) with a diameter and a ring width roughly corresponding to the DurchiP.es ~ '· - <nd the width of the massive spring cross-section of the printtt-i * i *, -order is. 8. Magnet support beam according to claim 6, characterized in that between the shaft (11) on the one hand and the sliding bush (15), the spring ring (17) and the compression spring (16), on the other hand, a tubular hub (23) fastened to the shaft (11) is arranged. 9. Magnetic support beam according to claim 8, characterized in that the hub (23) at the end at which the pulley nuts (13, 14) are attached, is provided with a stop flange (24) which is attached to the end face of the outer rope via a sliding washer (18) - 16 - roller nut (13) is in contact with the hub (23) at the other end has an adjusting ring (27), the outer end face of which rests against a nut (26) screwed onto the end of the hub and its inner end face rests against the end of the compression spring (16) which faces away from the spring ring (17), and that between the adjusting ring (27) and the inner pulley nut (14) a tubular sleeve (28) around the compression spring (23) is attached. 10. Magnetic support beam according to one or more of the preceding claims, characterized in that the bearings (12) of the Shaft (11) are attached to the top of the lower chord (3). 11. Magnetic support beam according to one or more of the above Claims, characterized in that the shaft (11) is mechanically coupled to a drive motor (30), e.g. a ». Gear motor, which is attached in the middle of the truss (1). 12. Magnet support beam according to claim 11, characterized in that the drive motor (30) is above the shaft (11) and is attached to the lower chord (3) with the aid of supports (31). 13. Magnetic support beam according to claim 11 or 12, characterized in that that the drive motor (30) is mechanically connected to the shaft (11) via a friction clutch (32) fitted on it with overload protection is coupled. 14. Magnetic support beam according to one or more of the preceding claims, characterized in that on the lower chord (3) an electrical limit switch (33) to protect against exceeding a predetermined angle of rotation of the magnets (6), which are preferably -90 ° to the vertical plane, is provided.