EP4126485A1

EP4126485A1 - Switchable magnet device

Info

Publication number: EP4126485A1
Application number: EP21713970.8A
Authority: EP
Inventors: Marko KIRBACH
Original assignee: BT Innovation GmbH
Current assignee: BT Innovation GmbH
Priority date: 2020-03-25
Filing date: 2021-03-25
Publication date: 2023-02-08
Anticipated expiration: 2041-03-25
Also published as: WO2021191358A1; US12076887B2; WO2021190747A1; DE102020122839A1; US20230117992A1; EP4126485B1; CN115666889A

Abstract

The invention relates to a switchable magnet device (3) comprising at least one magnet package (31a, 31b) which can be moved between an interaction position and a release position, wherein the magnet device (3) is configured such that the at least one magnet package (31a, 31b), when moving between the interaction position and the release position, at least partially performs a pivot movement about a pivot axis (32). An actuation device (9, 36, 37) is also provided, which can be coupled to the at least one magnet package (31a, 31b) to move the at least one magnet package (31a, 31b) between the interaction position and the release position. In order to easily lift the magnet from the formwork support (4) in a small working space, the magnet device (3) is configured such that the at least one actuation device (9, 36, 37), at least in portions and at least temporarily during the pivot movement of the at least one magnet package (31a, 31b), performs a linear movement in a linear movement direction.

Description

Switchable magnet device

The present invention relates to a switchable magnet device and a system comprising a shuttering device and a switchable magnet device.

A switchable magnetic device according to the preamble of claim 1 is known from utility model DE 20309970 U1. In it, the switchable magnetic device is a magnetic device for fixing a formwork device on a formwork support. A magnet is mounted pivotably about a pivot axis. The magnet can be moved from a locking position, in which the magnet is in magnetic operative connection with a formwork support, to a release position by means of an actuating lever that is coupled to the magnet. In the locked position, the formwork device for manufacturing concrete parts is fixed in its position.

Due to the lever arm from the pivot axis to the point of application of the lever, the lifting force to release the magnet from the formwork support is reduced compared to the case in which the magnet is lifted off in a translatory manner.

However, the actuating lever itself has to be pivoted in order to actuate the magnet, which requires a considerable working space. Furthermore, the actuating lever is supported on a formwork device during the pivoting movement, which leads to considerable stress on the formwork device. Therefore, these formwork devices must be dimensioned accordingly. Frictional forces or even jamming can also occur at the coupling point between the actuating lever and the magnet, which increases the actual lifting forces.

The present invention was made in view of the above-mentioned problems and it is based on the object of providing a switchable magnet device which requires a small working space and allows the magnet to be easily lifted off the formwork support.

This object is achieved by a switchable magnet device according to claim 1. Preferred embodiments are set out in the subclaims.

According to a first aspect, a switchable magnet device is provided which comprises at least one magnet package, which between an interaction position, in which the magnet package is preferably with a magnetizable formwork support, preferably by contacting the Formwork base is in a magnetic operative connection with the formwork base, and a release position can be transferred in which the magnetic operative connection between the formwork base and the magnet package is reduced, preferably canceled. The magnetic device is configured so that the at least one magnet package during the transfer rens performs a pivoting movement about a pivot axis at least in sections between the interaction position and the release position. Furthermore, the magnetic device comprises at least one actuation device which can be coupled to the at least one magnet pack for transferring the at least one magnet package between the interaction position and the release position at least one magnet package performs a linear movement along a linear direction of movement.

According to the above aspect, the at least one magnet package performs a pivoting movement about a pivot axis at least in sections during the transfer between the interaction position and the release position. The lifting force that is transmitted to the magnet package by the actuating device can be reduced by the lever arm effect already mentioned above. However, the magnet device is configured in such a way that the at least one actuating device carries out a linear movement along a linear movement direction at least in sections and at least temporarily during the pivoting movement of the at least one magnet package. Therefore, it is possible to work in a small work space, and the operation is facilitated for an operator. In addition, the actuating device does not have to be supported on a pivot axis of a shuttering device for transferring. This makes the configuration easier.

According to a further aspect, the magnet device can have a multiplicity of the magnet packages, and the magnet device can be configured in such a way that the multiplicity of magnet packages at least temporarily carry out the pivoting movement about their respective pivot axes at the same time.

If a large number of magnet packages are provided, high magnetic forces can be achieved with which a formwork device is pressed against the formwork support. The large number of magnet packages each perform a pivoting movement about their respective pivot axis, which enables easy lifting. Since the pivoting movement can take place at least temporarily at the same time, the magnet packs can be lifted off evenly. The linear direction of movement is preferably a direction that is essentially perpendicular to the formwork support,

As a result, the magnet packages can be lifted off particularly quickly and effectively. A working space can also be kept small in one direction parallel to the formwork support.

According to a further aspect, the at least one actuation device can be coupled to the at least one magnet package in such a way that the at least one magnet package with respect to the portion of the actuation device that can be moved linearly along the linear direction of movement in each case has at least one clearance that intersects the linear direction of movement - indicates degree of severity.

In this way, a decoupling of the pivoting movement of the at least one magnet package and the linear movement of at least one section of the actuating device can be generated in a particularly simple manner. At least one degree of freedom is preferably a rotational degree of freedom about an axis parallel to the pivot axis. This can effectively prevent the magnet package and the actuating device from jamming.

The magnet device preferably has at least one guide device which is configured to guide the at least one actuating device along the linear direction of movement.

As a result, the linear movement of the actuator can be reliably achieved. Potential constraining forces can also be absorbed by the guide device, which can also prevent the magnet package and actuating device from jamming.

According to a further aspect, the at least one actuating device for performing the pivoting movement with the at least one magnet package can be coupled to a load introduction point that is further away from the respective pivot axis than the point of application of the resulting force that is exerted by the magnetic operative connection on the at least one magnet package works.

It can thus be reliably ensured that a lower lifting force than the resulting magnetic force is required to lift the magnet packs.

According to a further aspect, the magnet device can have at least one support device on which the at least one magnet package is mounted so as to be pivotable about the respective pivot axis. A pivot axis can be specified by the support device. The magnet package can thus have a well-defined pivot axis on the magnet device and does not have to be stored on the formwork support, for example.

The at least one actuation device is preferably relatively movable with respect to the at least one support device, particularly preferably, along the linear direction of movement.

As a result, the pivoting movement can be reliably introduced into the magnet package, since a translational movement of the at least one magnet package can be prevented by the relative movement mixing the support device and the actuating device.

According to yet another aspect, the magnet device can be configured in such a way that the at least one magnet package performs a translational movement during or after the pivoting movement about the respective pivoting axis.

As a result of the oscillating movement, the magnetic force that results from the magnetic interaction between the at least one magnet package and the formwork support can be quickly reduced. If the magnetic force is lower, the at least one magnet package can be lifted off the formwork support quickly in a translatory manner with a low lifting force.

The magnet device preferably also has a locking mechanism which is configured to lock the pivoting movement of the at least one magnet package. The locking mechanism is particularly preferably configured in such a way that it blocks the relative movement between the at least one actuating device and the at least one supporting device.

As a result, the pivoting movement can be blocked after a predetermined path along the pivoting movement, which renders a necessary working space for a continuous pivoting movement superfluous. As already explained above, the magnetic force is reduced according to a predetermined path along the pivoting movement, as a result of which a slight translational lifting can take place. If the pivoting movement is blocked, a lifting force with a component can reliably set a translational movement of the at least one magnet package in motion along the linear movement direction. If the at least one actuation device is relatively movable with respect to the at least one support device, the pivoting movement can be reliably blocked by blocking this degree of freedom.

According to a further aspect, the at least one actuating device can have coupling points with the at least during the translational movement of the at least one magnet package at least one magnet package arranged so that no torque acts on the actuating device. The coupling points are preferably arranged symmetrically with respect to an axis of the linear direction of movement which runs along the linear direction of movement through an actuation point at which a load is introduced into the actuation device.

If there is no torque acting on the actuating device, the actuating device can be moved particularly easily along the linear direction of movement. In particular, there are no constraining forces. This can be achieved in particular in that the coupling points are arranged symmetrically with respect to an axis which runs along the linear direction of movement through an actuation point at which an operator grips the actuation device.

The at least one actuating device preferably has a linear extension section which extends along the linear direction of movement.

This facilitates the alignment along the linear direction of movement and thus the operability for an operator. In addition, a lifting force can be transmitted along the linear movement direction along the linear extension section.

According to yet another aspect, the actuating device can have at least one lever section which is configured to generate a force with a component along the linear direction of movement from an axis of the linear direction of movement which is passed through an actuation point at which a load is applied Actuating device is initiated, runs along the linear direction of movement, in each case to be displaced to at least one coupling point away from the axis of the linear direction of movement. The lever section is preferably coupled to the aforementioned linear extension section.

By means of the lever section, the actuation point can be provided at a distance from the coupling points at which the actuation device is coupled to the at least one ironer package. An adaptation to spatial boundary conditions can thus take place in a formwork device. In addition, a lifting force can be introduced centrally into the lever section and then displaced outwards for introduction into the magnet packs in order to ensure the largest possible lever arm.

According to a further aspect, a single actuating device can be coupled to the multiplicity of magnet packs. This simplifies the configuration, since an operator can transfer the large number of magnet packages from the locking division to the release position via a single actuating device.

Preferably, the one actuating device for performing the pivoting movement of the plurality of magnet packs has coupling points with the magnet packs which are arranged in such a way that no torque acts on the actuating device. The coupling points are preferably arranged symmetrically with respect to an axis of the linear direction of movement which runs along the linear direction of movement through an actuating part at which a load is introduced into the actuating device.

In particular in the case of a large number of magnet packages, the coupling points can also be arranged for performing the pivoting movement in such a way that no torque acts on the actuating device. The actuating device can thus be moved particularly easily along the linear direction of movement, even during the pivoting movement of the magnet packs. In particular, there are no constraining forces. This can be achieved in particular in that the coupling points are arranged symmetrically with respect to an axis which runs along the linear direction of movement through an actuation point at which an operator grips the actuation device.

Preferably, at least some of the plurality of magnet packets are of identical design

This means that the same magnetic forces can act between the individual magnet packages and the formwork base. A uniform loading of the actuating device can thus be made possible, which results in particular in the absence of a torque for the actuating device.

The plurality of magnet stacks are preferably arranged uniformly in a circumferential direction around a central axis.

This simplifies the configuration and can also ensure an even load on the actuating device.

The central axis preferably coincides with an axis of the linear direction of movement which runs along the linear direction of movement through an actuation point at which a load is introduced into the actuation device.

This also simplifies the configuration. In particular, the lifting force can be initiated centrally and then distributed evenly to the magnet packages around the central axis. According to yet another aspect, a single support device can be arranged in a center between the plurality of magnet packs. The aforementioned central axis preferably runs through the support device. It is particularly preferred that all of the magnet packs of the plurality of magnet packs are pivotably mounted on the one stub device. It is particularly preferred again if magnet packs lying opposite one another have a common pivot axis.

As a result, the magnetic device is kept compact and the working space can be kept small, in particular the support device can be arranged centrally and a symmetrical introduction of force into the support device can be achieved.

According to a further aspect, the magnet device can have at least one release support device which is configured to support moving the respective magnet package into the release position. The release assistance device is preferably coupled to the at least one support device and preferably has at least one elastic element, particularly preferably a spring element.

The lifting force to be applied by an operator can thus be further reduced. For example, an elastic element such as a compression spring can be provided on the side of the formwork support, which element is arranged between the support device and the formwork support. The spring force can support a movement away from the formwork support.

Another aspect is directed to a system which has a formwork device, which has a formwork section for shaping concrete parts, and a switchable magnet device according to one of the preceding aspects. The switchable magnet device can be coupled to the formwork device at least in the interaction position of the at least one magnet package in such a way that a contact force with a component is transmitted to the formwork device in the direction of the formwork support.

Thus, the above magnetic device can fix the formwork device in its position in the interaction position. In particular, access to the actuating device on the formwork device can be provided relatively small compared to the prior art, in which a large recess is provided for the actuating lever.

The magnetic device is preferably arranged at least in sections in an interior of the formwork device. As a result, the magnetic device can be protected by the formwork device, and the system can be made compact. Since the actuating device can move linearly, only a narrow recess needs to be provided for leading out the actuating device.

According to a further aspect, the at least one guide device can have a section of the formwork device, the formwork device preferably having a guide bushing which is configured to guide a section of the actuation device.

Thus, the actuating device can be guided by the formwork device, which is stable on the formwork underlay. In this way, stable guidance can be ensured. A guide bushing can be attached to the formwork device in a particularly simple manner.

According to a further aspect, the system can have at least one elastic element, preferably a spring element, via which the magnet device is coupled to the formwork device at least in the interaction position of the at least one magnet package.

This can ensure that the pressing force is reliably introduced into the formwork device. In particular, a double fit can be avoided. Furthermore, the elastic element can also function as part of the release assistance device.

The aspects set out above are explained in detail below with reference to the accompanying drawings.

1 shows a perspective view of a system which has a formwork device and a magnetic device, the formwork device being arranged on a formwork support

FIG. 2 shows a longitudinal sectional view of the system from FIG. 1, with a section being made through a longitudinal plane of symmetry of the magnetic device.

3 shows a side view of the magnet device, the magnet packages being shown in a lowered position (locking position).

4 shows a side view of the magnet device, the magnet packages being shown in a raised position (release position).

5 shows a formwork device with a magnetic device during assembly in a perspective view. In the following description, directions such as “up” and “down” are not to be understood as restrictive. Rather, they are only intended to make the arrangements easier to understand.

FIGS. 1 and 2 show a system 1 which has a formwork device 2. The shuttering device 2 has a shuttering section 21 for shaping concrete parts and is coupled to a magnetic device 3

In the present embodiment, the magnet device 3 comprises two magnet packages 31a and 31b, which can each be transferred between an interaction position and a release position. FIGS. 1 and 2 show the magnet packages 31a and 31b each in the interactive tone position in which the magnet packages 31a and 31b with a magnetizable formwork support 4 are in a magnetic operative connection with a formwork support 4. As shown in particular in FIG. The shuttering device 4 is made of a ferromagnetic material and can therefore be magnetized. In the interaction position of the two magnet packs 31a and 31b, there is a magnetic interaction between the formwork support 4 and the two magnet packs 31a and 31b, which acts on the magnet packs 31a and 31b with a force component in the direction of the formwork support 4

The two similar magnet packages 31a and 31b each have at least one permanent magnet. The magnet stacks 31a and 31b preferably each have a plurality of permanent magnet elements spaced parallel to one another in the form of a rod, and furthermore ferromagnetic elements arranged between them.

In the interaction position of the magnet packages 31a and 31b, the magnetic force that acts on the magnet packages 31a and 31b is transmitted to the formwork device 2, so that the formwork device 2 is fixed in its position. In particular, in this position the formwork section 21 forms a lateral delimitation for a concrete part to be cast. Due to the fixation via the magnetic device 3, the formwork device can withstand high concreting pressures and enable concrete parts to be manufactured true to size.

With the aid of FIGS. 1 to 4, the structure of the magnetic device 3 will now be described.

The magnet device 3 has a single pivot axis 32, about which the two magnet packs 31a and 31b are each pivotably mounted. The magnet packages 31a and 31b are on one Support device 33 attached. The support device has a block-shaped part through which a parallel, opposite side surfaces penetrating cylindrical shaft 34 extends parallel to the formwork support 4, so that cylindrical projections protrude from the two side surfaces. A central axis of the shaft 34 forms the pivot axis 32.

The support device 33 also has an axially symmetrical opening 35 extending downward from an upper side of the block-shaped part in a direction perpendicular to the formwork support 4.

In the opening 35, a cylindrical bolt 36 is arranged so that it can move relative to the support device 33. The bolt 36 extends linearly in a direction perpendicular to the formwork support 4. The bolt 36 has a first threaded section 36a and a second threaded section 36b. At the level of the first threaded section 36a, a lever plate 37 is arranged that extends essentially perpendicular to both sides of the bolt 36 parallel to the formwork support 4. The lifting plate 37 arranges the bolt centrally in the interior of a through opening 37a. As shown in FIG. 1, the lever plate 37 has an essentially cuboid rod shape. The lever plate 37 is secured to the bolts 36 above and below in each case via lock nut structures 5a and 5b. This allows simple production with safe power transmission at the same time. The lever plate 37 preferably has an internal thread in the area of the through opening 37. That makes the power transmission more efficient.

In the respective outer edge regions on both sides of the bolt 36, the lever plate 37 has elongated holes 37b1 and 37b2 that penetrate the lever plate 37. The elongated holes 37b1 and 37b2 are each penetrated by bolts 6a and 6b in a direction perpendicular to the direction in which the lever plate 37 extends. Plate-shaped compensating elements 7a and 7b are each rotatably mounted on the bolts 6a and 6b.

The plate-shaped compensating elements 7a and 7b are penetrated by bolts 6a and 6b at one end on the lever plate 37 side. At the opposite end, plate-shaped compensating elements 7a and 7b each have openings through which bolts 8a and 8b are guided. The magnet packs 3t a and 31b are each rotatably mounted on these bolts 8a and 8b.

Even further outward with respect to the elongated holes 37b1 and 37b2, the lever plate 37 has cylindrical openings 37c1 and 37c2 on both sides of the bolt 36 which penetrate the lifting plate 37 in the linear direction of movement. The openings 37c1 and 37c2 become, respectively penetrated by guide rods 11a and 11b which are provided on the formwork device 2.

On the second threaded section 36b at an upper end of the bolt 36, a button 9 is screwed as an actuating element via an internal thread. The button 9 extends in the linear direction of movement. On its underside, the button 9 has a recessed receiving space 9a which extends upwards and is delimited by a bottom surface 9b.

As can be seen in the sectional view of FIG. 2, the formwork device 2 has a socket 22. The socket 22 can be provided on the formwork device 2, for example by welding. The socket 22 has a cylindrical recess 22a which is delimited on an underside by a bottom surface 22b.

The button 9 rests with the bottom surface 9b on one end of a spring 10 which is partly received in the receiving space 9a. The opposite end of the spring 10 rests on the bottom surface 22b of the socket 22.

The operation of the present invention will be described below.

An operator can have the magnet packages 31a and 31b perform a pivoting movement about the common pivot axis 32 starting from the interaction position by pulling on the button 9.

The operator can initiate the pivoting movement of the magnet packs 31a and 31b solely by a lifting force in a direction perpendicular to the formwork support 4, that is, along the linear direction of movement. The force is transmitted from the button 9 to the central bolt 36 via the second threaded section 36b. Via the first threaded section 36a and the lock nut structures 5a and 5b, the force is finally shifted outwards from the central bolt 36 via the lever plate 37, where it is transferred via the bolts 6a and 6b, the compensating elements 7a and 7b and the bolts 8a and 8b is introduced into the magnet packages 31a and 31b.

The bolts 8a and 8b are each load introduction points for the magnet packs 31a and 31b, while the bolts 6a and 6b are each coupling points of the lifting plate 37 as part of the actuation device with the magnet packs 31a and 31b.

The lifting force is introduced into each of the magnet packs 31a and 31b as a force pointing essentially in a direction perpendicular to the formwork support 4. As shown in FIG. 3, the lifting forces divided between the two bolts 8a and 8b each act with a lever arm 12a and 12b with respect to the pivot axis 32. Thus, a torque acts on the magnet packets 31a and 31b which are not absorbed by the shaft 34 of the support device 33. The magnet packs 31a and 31b therefore each perform a pivoting movement while the actuating device, which is formed by the button 9, the bolt 36 and the lever plate 37, is moved away from the formwork support 4 in a linear, perpendicular manner.

In the above embodiment, a switchable magnet device 3 is provided, which comprises at least one magnet package 31a or 31b, which is located between an interaction position in which the magnet package 31a or 31b with a formwork support 4 is in a magnetic operative connection with the formwork support , and can be transferred to a release position in which the magnetic operative connection between the formwork support and the magnet package is reduced. The release position is in Flg. 4 shown. The magnet packages are shown in a pivoted position. The magnet device 3 is thus configured in such a way that the at least one magnet package 31a or 31b performs a pivoting movement about the pivot axis 32 at least in sections during the transfer between the interaction position and the release position.

Furthermore, the magnetic device comprises at least one actuating device 9, 36 and 37, which can be coupled to the at least one magnetic package 31a or 31b for transferring the at least one magnetic package 31a or 31b between the interaction position and the release position. As explained above, the magnet device is configured in such a way that the at least one actuating device 9, 36 and 37 carries out a linear movement along a linear movement direction at least in sections and at least temporarily during the pivoting movement of the at least one magnet package 31a or 31b.

According to the above aspect, the at least one magnet package 31a or 31b performs a pivoting movement about the pivot axis 32, at least in sections, during the transfer between the interaction position and the release position. The lifting force, which is transmitted to the magnet package via the actuating device 9, 36 and 37, can be reduced by lever arm action. The magnet device 3 is configured in such a way that the at least one actuating device 9, 36 and 37, at least in sections and at least temporarily, performs a linear movement along a linear movement direction during the pivoting movement of the at least one magnet package 31a or 31b. Therefore, work can be carried out in a small work space and the operation is facilitated for an operator. In particular, the Operator pull the button 9 along the linear direction of movement. In addition, the actuating device 9, 36 and 37 does not have to be supported on a pivot axis of a formwork device for transferring. This makes the configuration easier.

As stated above, the magnet device 3 has a plurality of the magnet packs 31a and 31b. The magnet device is configured in such a way that the plurality of magnet packs 31a and 31b at least temporarily carry out the pivoting movement about their respective pivot axis 32 at the same time.

In this way, high magnetic forces can be achieved with which the formwork device 2 is pressed against the formwork support 4. The plurality of magnet packages 31 a and 31 b each perform a pivoting movement about their respective pivot axis 32, which enables easy lifting. Since the pivoting movement can take place at the same time, at least temporarily, the magnet packs can be lifted evenly, as shown in FIG. 4.

In the embodiment, the linear direction of movement is a direction essentially perpendicular to the formwork support.

As a result, the magnet stacks 31a and 31b can be lifted off particularly quickly and effectively. A working space in a direction parallel to the formwork support 4 can also be kept small.

As explained above, the actuating device is coupled to the magnet packs 31a and 31b via the compensating elements 7a and 7b. The compensation elements 7a and 7b are each rotatable about the bolts 6a and 6b. Furthermore, the magnet packages 31a and 31b are each rotatable with respect to the compensating elements 7a and 7b by the bolts 8a and 8b. The magnet packs 31a and 31b thus each have two rotatory degrees of freedom connected one behind the other about axes that are parallel to the pivot axis 32 but spaced apart from one another with respect to the actuating device. Thus, the magnet packets each have at least one degree of freedom intersecting the linear direction of movement with respect to the portion of the actuating device that can be moved linearly along the linear direction of movement (here the rigid body formed by bolts 36, lever plate 37 and button 9).

As a result, a decoupling of the pivoting movement of the at least one magnet package and the linear movement of at least one section of the actuating device can be produced in a particularly simple manner. In particular, the two rotational degrees of freedom connected one behind the other can, on the one hand, compensate for the spacing between the magnet packs 31a and 31b to the actuating device and a compensation in the position of the magnet packs can be achieved. These compensations are advantageous due to the different trajectories of the pivoting movement of the magnet packs and the linear movement of the actuating device.

Furthermore, the guide rods 11a and 11b are provided which penetrate the openings 37c1 and 37c2, respectively. Thus, a pair of guide rods 11a and 11b and borders of the openings 37c1 and 37c2 each represent a guide device. As can be seen from a comparison of FIGS guided. The lifting plate 37 is thus arranged higher in FIG. 4 than in FIG. 3.

Also, the central bolt 36 is slidably provided in the opening 35 of the support means. The border of the opening 35 and the bolt 36 thus also form a guide device. The bolt 36 protrudes further from the support device 33 in FIG. 4 than in FIG. 3.

Furthermore, an outer peripheral surface 9c of the button 9 is slidably received in the recess 22a of the socket 22. Therefore, the border of the recess 22a together with the button also represents a guide device.

Thus, each of the sections 9, 36, 37 is guided along the linear movement direction.

As a result, the linear movement of the actuator can be reliably achieved. Potential constraining forces can also be absorbed by the guide device, which can prevent the magnet package and actuating device from jamming.

As already explained above, the bolts 8a and 8b are each load introduction points for the magnet packets 31a and 31b. The bolts are each attached to an end of the magnet packs 31a and 31b that is remote from the pivot axis 32 in a direction perpendicular to the pivot axis 32. As shown in FIG. 3, the resulting magnetic forces Fmag acting on the magnet packs 31a and 31b can each be viewed as acting in the middle of the magnet packs 31a and 31b.

Thus, the actuating device for performing the pivoting movement with the magnet packages 31a and 31b is each coupled to a load introduction point that is further away from the respective pivot axis 32 than the point of application of the resulting force Fmag, which is applied to the at least one by the magnetic operative connection Magnet package works. It can thus be reliably ensured that a lower lifting force than the resulting magnetic force is required to lift off the magnet packs 31a and 31b.

Furthermore, the magnet device 3 has a support device 33 on which the magnet packages 31 a and 31 b are mounted pivotably about the respective pivot axis 32.

The pivot axis 32 can be specified by the support device 33. Thus, the magnet packs can have a well-defined pivot axis 32 on the magnet device 3 and do not have to be stored on the formwork support, for example. Furthermore, the support device can also take on other tasks such as guiding the central bolt 36, as has been described above.

The central bolt 36 as part of the actuation device is provided in a sliding manner in the opening 35 of the support device 33. Thus, the one actuation device is relatively movable with respect to the at least one support device along the linear direction of movement.

As a result, the pivoting movement can be reliably introduced into the magnet packs 31a and 31b, since the relative movement between the support device and the actuating device ensures freedom of movement for the swiveled magnet packs.

As shown in FIG. 4, the magnet packs 31a and 31b are not only pivoted in the release position, but are also lifted from the formwork support 4 together with the support device 33 in a direction perpendicular to the formwork support 4. Depending on the lifting force and the acting magnetic forces, the support device 33, which supports the magnet packages on the shaft 34, can be lifted off the ground. The magnet device 3 is thus configured in such a way that the magnet packets perform a translational movement during or after the pivoting movement about the respective pivoting axis 32.

As a result of the pivoting movement, the magnetic force that results from the magnetic interaction between the at least one magnet package and the formwork support can be quickly reduced. If the magnetic force is lower, the at least one magnet package can be lifted off the formwork base quickly in a translatory manner with a low lifting force.

The movement of the compensating elements 7a and 7b is limited by the border around the respective elongated holes 37b1 and 37b2. Thus, after a certain rotation of the compensation elements 7a and 7b about the bolts 6a and 6b, no further rotation can take place. Thus, the borders of the respective elongated holes 37b1 and 37b2 not only block the movement of the Compensating elements 7a and 7b, but also the pivoting movement of the magnet packages. The locking mechanism is also configured by the borders of the respective elongated holes 37b1 and 37b2 in such a way that it blocks the relative movement between the at least one actuating device and the at least one stopping device 33.

As already explained above, the bolts 6a and 6b function as coupling points of the actuating device with the magnet packages. The bolts 6a and 6b are arranged symmetrically with respect to a central axis of the central bolt 36 on both sides. The central axis of the bolt 36 runs along the linear direction of movement and also runs through an actuation point at which a load (the lifting force) is introduced into the actuation device. The actuation point here is the button 9, more precisely its central axis, which coincides with the central axis of the bolt 36 in the assembled state. A resulting lifting force that an operator introduces into the actuating device is usually introduced along the central axis. The lifting force along the central axis of the bolt 36 and components of the resulting magnetic forces acting on the respective magnet packs 31a and 31b at the coupling points on the bolts 6a and 6b therefore act on the actuating device that has been cut out of locked compensating elements 7a and 7b, opposing moments also occur at the locations of the elongated holes 37b1 and 37b2. Since the coupling points are arranged symmetrically with respect to the axis of the resulting lifting force (central axis of the bolt 36) and thus have an equal lever arm to this axis, and in the case of locked compensating elements, the torques are opposite to one another, no resulting torque acts on the actuating device (on the section that can be moved linearly along the linear direction of movement) bet loading this with the lifting force. If there is no torque acting on the actuating device, the actuating device can be moved particularly easily along the linear direction of movement. In particular, there are no constraining forces. This can be achieved in particular in that the coupling points are arranged symmetrically with respect to an axis which runs along the linear direction of movement through an actuation point at which an operator grips the actuation device. In particular in the case of a large number of magnet packs, the coupling parts for performing the pivoting movement can be arranged in such a way that no torque acts on the actuating device. Thus, the actuating device can be moved particularly easily along the linear direction of movement even during the pivoting movement of the magnet packs. In particular, there are no constraining forces. This can be achieved in particular in that the coupling points are arranged symmetrically with respect to an axis which runs along the linear direction of movement through an actuation point at which an operator grips the actuation device.

The actuating device has the bolt 38 and the button 9, both of which extend coaxially along the linear direction of movement. Bolt 36 and button 9 thus represent a linear extension section, the axis of which extends along the linear direction of movement.

Furthermore, the actuating device has the lever plate 37, which shifts forces away from the axis of the linear extension section (axis of the bolt 36 and the button 9). Thus, the lifting plate is a lever portion that is configured to generate a force with a component along the linear direction of movement from an axis of the linear direction of movement that runs along the linear direction of movement through an actuation point at which a load is introduced into the actuating device, to relocate each to at least one coupling point away from the axis of the linear direction of movement.

The lever section is positively coupled to the linear extension section via the two lock nut structures 5a and 5b.

By means of the lever section, the actuation point can be provided at a distance from the coupling points at which the actuation device is coupled to the at least one ironer package will. An adaptation to spatial boundary conditions can thus take place in a formwork device. In addition, a lifting force can be introduced centrally into the lifting section and then shifted to the outside for introduction into the magnet packs in order to ensure the largest possible lever arm. In the embodiment, a single actuation device 9, 36 and 37 is also coupled to the magnet packs 31a and 31b

This simplifies the configuration, since an operator can transfer the large number of magnet packages from the locking position to the release position via a single actuating device.

The large number of magnet packages are also designed in the same way

The magnet packages 31a and 31b are also arranged at circumferential angles of 180 ° from one another. More precisely, the perpendiculars to the pivot axis 32 of the two magnet packages 31 a, which run parallel to the formwork support 4, form a straight line. Thus, the magnet packs 31a and 31b are arranged uniformly in a circumferential direction around a central axis.

The central axis of the bolt 36 coincides with the central axis around which the magnet packs 31a and 31b are arranged uniformly. The central axis, around which the magnet packs 31 a and 31 b are evenly arranged, corresponds to an axis of the linear direction of movement which runs along the linear direction of movement through an actuation point at which a load is introduced into the actuation device.

This also simplifies the configuration. In particular, the lifting force can be initiated centrally and then distributed evenly to the magnet packages around the central axis.

Furthermore, a single support device 32 is to be arranged in the middle between the multiplicity of magnet packs. The central axis of the bolt 36 runs through the support device 33 and is also a central axis of the support device 33 As a result, the magnetic device is kept compact and the working space can be kept small. In particular, the stop device 33 can be arranged centrally and a symmetrical introduction of force into the support device 33 can be achieved.

The system has a formwork device 2, which has a formwork section 21 for shaping concrete parts, and a switchable magnetic device 3 according to the preceding explanations. The switchable magnet device is coupled to the formwork device 2 at least in the interaction position of the magnet packs 31a and 31b so that a contact force with a component in the direction of the formwork support 4 is transmitted to the formwork device.

The formwork device 2, as shown in FIG. 1, has a formwork support section 23. The formwork support section 23 supports the formwork section 21 and has a cover section 23a, which lies on a side facing away from the formwork support 4 and preferably extends horizontally here. On both sides in the longitudinal direction of the formwork device 2, which is defined by the longitudinal extent of the formwork section 21, lateral sections 23b extend downward from the cover section 23a in the direction of the formwork support. The cover section 23a and the two lateral sections 23b form a receiving space, in the interior of which the magnetic device is received at least in sections. Only the button 9 protrudes upward from the formwork support section 23.

As a result, the magnetic device 3 can be protected by the formwork device 2, and the system can be made compact. Since the actuating device can move linearly, only a narrow recess needs to be provided for leading out the actuating device.

The button 9 is designed to be detachable from the bolt 36, so that the button 9 can also be removed. The actuating device thus has a detachable section which can be coupled to actuate the magnetic device.

A recess 23a1 through which the actuating device is guided to the outside can thus also be closed. As already mentioned above, the formwork device (the formwork support section 23) has the guide bush 22, which guides the button 9 along the linear direction of movement. Thus, at least one guide device has a section of the formwork device.

Thus, a section of the actuating device can be guided by the formwork device, which is stable on the formwork support. In this way, stable guidance can be ensured. The guide bushing can be attached to the Schaiungsvorrichtung particularly easily, for example by welding.

As already mentioned, the button 9 rests with the bottom surface 9b on one end of a spring 10, which is partly received in the receiving space 9a. The spring 10 is designed here as a compression spring. The opposite end of the spring 10 rests on the bottom surface 22b of the socket 22. The system 1 thus has at least one elastic element, via which the magnet device 3 is coupled to the formwork device 2 at least in the interaction position of the at least one magnet package. More precisely, the spring 10 is arranged between the magnetic device 3 and the shuttering device 2.

This can ensure that the pressing force is reliably introduced into the formwork device 2. In particular, a double fit can be avoided if the magnet packages rest on the formwork support 4.

It is not shown, but it is advantageous if the magnet device has at least one release support device which is configured to support the transfer of the respective magnet package into the release division. The release assistance device is preferably coupled to the at least one support device and preferably has at least one elastic element, particularly preferably a spring element. The spring 10 just described is also part of a release assistance device. The elastic spring force supports the lifting of the magnet packs and can, if necessary, hold the magnet packs in the release position.

With reference in particular to FIG. 5, the assembly of the system 1 according to the invention will now be explained.

As shown in FIG. 5, a substantially rectangular frame plate 13 is used for the assembly. The frame plate has an essentially rectangular recess 13a, which has larger dimensions than the mounted magnet packages 31a and 31b. The frame plate 13 can rest on a non-magnetic base, for example a wooden table, the base likewise having a depression of at least the size of the recess 13a. The magnet packets 31a and 31b preassembled on the support device 33 can then be inserted into the recess. The actuation device is also pre-assembled except for button 9.

The guide rods 11 a and 11 b are provided on the frame plate 13. The preassembled actuating device can then simply be placed on the guide rods 11a and 11b via the openings 37c1 and 37c2. Finally, the preassembled magnet packages 31a and 31b can be aligned accordingly and coupled to the actuating device via the compensating elements 7a and 7b.

The frame plate 13 also has an auxiliary assembly opening 13b on both transverse sides. The formwork device 2 also has corresponding auxiliary assembly openings on a lower section 23c, which faces the formwork support 4 and extends parallel to the cover section 23a. It should be noted that the formwork device 2 is rotated for better assembly, as shown in FIG. 5. In particular, the lower section 23c in FIG. 5 is directed upwards Then the auxiliary assembly openings 13b of the frame sheet 13 are aligned and fitted with the dowel pins. those shown in FIG. 1 are attached. Finally, the dowel pins are pulled.

In the assembled state and aligned on the formwork support 4, the frame sheet 13 is located below the lower section 23c.

For assembly, the frame section 13 is provided, which has at least one guide device 11a or 11b and at least one positioning aid 13b.

The magnet packets can thereby be aligned according to the guide section and coupled to the actuating device coupled to the guide device. The entire preassembled magnetic device 3 can then be aligned relative to the formwork device via the positioning aid. Thus, the magnetic device can be set up separately from the formwork device. The assembly is further facilitated if the support device and the actuation device and the articulated connection via the bolts 6a and 6b as well as 8a and 8b and compensating elements 7a and 7b are made of non-magnetic materials. For example, these parts can be made of non-magnetic metals or synthetic resins.

Possible modifications to the above embodiment will now be described.

While the above embodiment includes two magnet packages, only one or a greater number than two can be provided. In the case of a magnet package, the actuating device can have a linear extension section which runs essentially through the load introduction point of the magnet package. The lever section can thus be omitted.

In the release position, according to FIG. 4, the magnet packages are pivoted and displaced in a translatory manner. However, the release position can also be a position in which the at least one magnet package is merely pivoted. The sequence of translation and pivoting movement is also not fixed. Thus, the at least one magnet package can first be pivoted into an intermediate pivot position from which it is then only lifted off in a translatory manner into the complete release position. Translation and pivoting movements can also be carried out at the same time.

The shape of the locking mechanism is also not restricted. For example, the pivoting movement can also be blocked by a stop in the support device 33 against which a projection on the lower end of the bolt 36 rests. The relative movement of the parts, the supporting device 33 and the actuating device (bolts 36 thereof), which are movable relative to one another, is immediately blocked.

The number of guide institutions is not specified. However, a guide device is preferably provided for each coupling point.

The degree of freedom that intersects the linear direction of movement is not limited to a rotational degree of freedom.At least one translational degree of freedom that intersects the linear direction of movement can also be used with respect to the linearly moving section (rigid section consisting of button 9, bolt 38 and lever plate 37, which are described in the above Embodiment form a rigid body) are provided. Thus, instead of the articulated embodiment with the bolts 6a and 6b as well as 8a and 8b, a sliding block can also be provided which extends in a direction intersecting the linear direction of movement, preferably perpendicular to the linear movement. direction of movement, in the above embodiment that is parallel to the formwork support, in which at least one magnet package can slide. The sliding block is preferably also mounted in an articulated manner in order to allow compensation in the orientation. An elastic element, such as, for example, an elastomer section, can also be provided between or within the actuating device and the magnet package.

The actuating device can also be designed integrally. The actuating device can comprise one or more sections which are connected upstream of the at least one magnet package in the force flow when a lifting force is transmitted.

The shape of the release support device is also not limited. For example, an elastic element such as a compression spring, which is arranged between the support device and the form base, can be provided on the side of the formwork support. The spring force can support a movement away from the formwork support. In particular, a translation movement can be supported.

List of reference symbols:

1 system

2 formwork device

3 magnetic device

4 Formwork underlay 5a, 5b lock nut structure 6a, 6b bolts

7a, 7b compensation element 8a, 8b bolts

9 button

9a receiving space of the button 9b bottom surface of the button 9c outer peripheral surface of the button

10 spring

11a, 11b guide rod

12a, 12b lever arm

13 frame plate

13a recess of the frame plate

13b auxiliary installation opening

13c through opening of the frame plate

21 Formwork section

22 socket 22a recess of the bush 22b bottom surface of the bush 23 formwork support section 23a cover section 23a 1 recess of cover section 23b lateral section 23c lower section 3a1, 31b magnet package 32 pivot axis 33 support device 34 shaft 35 opening of support device 36 bolt 36a first threaded section 36b second threaded section 37 lever plate 37a through hole 37b1 37b2 elongated hole of the lever plate 37c1, 37c2 opening of the lever plate

Claims

1. Switchable magnet device (3), comprising: at least one magnet package (31a, 31b), which between an interaction division in which the magnet package (31a, 31b) is preferably with a magnetizable shuttering base (4), preferably by contacting the shuttering base (4) is in a magnetic operative connection with the formwork support (4), and a release position can be transferred in which the magnetic operative connection between the formwork support (4) and the magnet package (31a, 31b) is reduced, preferably canceled, the magnetic device (3) is configured in such a way that the at least one magnet package (31a, 31b) performs a pivoting movement around a pivot axis (32) at least in sections during the transfer between the interaction position and the release position, and at least one actuating device (3, 36, 37) ), which are used to transfer the at least one magnetic package (31a, 31b) between the interaction position and the release position with the at least one magnet package (31a, 31b) can be coupled, characterized in that the magnet device (3) is configured in such a way that the at least one actuating device (9, 36, 37) at least in sections and at least temporarily during the pivoting movement of the at least one magnet package (31a , 31b) performs a linear movement along a linear direction of movement.

2. The switchable magnet device (3) according to claim 1, wherein the magnet device comprises a plurality of the magnet packs (31a, 31b), and the magnet device is configured so that the plurality of magnet packs (31a, 31b) at least temporarily simultaneously perform the pivoting movement around their respective pivot axis.

3. The switchable magnetic device according to claim 1 or 2, wherein the linear direction of movement is a direction substantially perpendicular to the formwork support (4).

4. The switchable magnetic device (3) according to one of the preceding claims, wherein the at least one actuating device (9, 36, 37) is coupled to the at least one magnet package (31a, 31b) in each case in such a way that the at least one magnet package (31a, 31 b) regarding the self along the linear direction of movement linearly movable section of the actuating device (9, 36, 37) in each case has at least one degree of freedom intersecting the linear direction of movement.

5. The switchable magnet device (3) according to one of the preceding claims, wherein the magnet device (3) has at least one guide device (11a, 11b, 35, 22b) which is configured, the at least one actuating device (9, 36, 37 ) along the linear direction of movement.

6. The switchable magnet device (3} according to one of the preceding claims, wherein the at least one actuating device (9, 36, 37) for performing the pivoting movement with the at least one magnet package (31 a, 31 b) is coupled to a load introduction point, which is further away from the respective pivot axis (32) than the point of application of the resulting force, which acts on the at least one magnet package (31a, 31b) due to the magnetic operative connection.

7. The switchable magnet device (3) according to one of the preceding claims, wherein the magnet device has at least one support device (33) on which the at least one magnet package (31a, 31b) is pivotably mounted about the respective pivot axis (32).

8. The switchable magnetic device (3) according to claim 7, wherein the at least one actuating device (9, 36, 37) is relatively movable with respect to the at least one supporting device (33), preferably along the linear direction of movement.

9. The switchable magnet device (3) according to one of the preceding claims, wherein the magnet device (3) is configured such that the at least one magnet package (31a, 31b) translates during or after the pivoting movement about the respective pivot axis (32) - performs movement.

10. The switchable magnet device (3) according to one of the preceding claims, wherein the magnet device (3) further comprises a locking mechanism which is configured to lock the pivoting movement of the at least one magnet package (31a, 31b), the locking mechanism preferably being configured in such a way that it blocks the relative movement between the at least one actuating device (9, 36, 37) and the at least one supporting device (33).

11. The switchable magnetic device (3) according to claim 2 and one of claims 3 to 10, wherein a single actuating device (9, 36, 37) can be coupled to the plurality of magnet packages (31a, 31b).

12. The switchable magnet device according to claim 11, wherein the actuating device (9, 36, 37) for performing the pivoting movement of the plurality of magnet packages (31a, 31b) has coupling points with the magnet packages, which are arranged so that no torque is applied to the Actuating device (9, 36, 37) acts, the coupling points preferably being arranged symmetrically with respect to an axis of the linear direction of movement which is initiated by an actuating point at which a load is introduced into the actuating device (9, 36, 37), runs along the linear direction of movement.

13. The switchable magnet device (3) according to one of the preceding claims, wherein the magnet device (3) has at least one release support device (10) which is configured to support an upper guide of the respective magnet package (31a, 31b) into the release position. zen, wherein the release support device (10) is preferably coupled to the at least one support device (32) and preferably has at least one elastic element, particularly preferably a spring element.

14. System comprising: a shuttering device (2) which has a shuttering section for shaping concrete parts, and a switchable magnet device (3) according to one of the preceding claims, wherein the switchable magnet device (3) at least in the interaction position of the at least one magnet package ( 31a, 31b) is coupled to the formwork device (2) in such a way that a contact force with a component in the direction of the formwork support (4) is transmitted to the formwork device (2).

15. System according to claim 5 and 14, wherein the at least one guide device (22b) has a portion of the formwork device (2), wherein the formwork device (2) preferably has a guide bushing (22) which is configured to include a portion of the actuating device - direction (9, 36, 37).