A switchable magnet system includes a housing and a switchable magnet device

Abstract

A switchable magnet device and system, comprising a housing and a switchable magnet device, the switchable magnet device comprising at least one magnet stack (4) which can be switched between an active position, in which the magnet stack (4) is magnetically functionally connected to a formwork support, preferably to a magnetizable formwork support, preferably by contact with the formwork support, and a release position, in which the magnetically functional connection between the formwork support and the magnet stack (4) is reduced, preferably cancelled. In order to easily lift the magnet device, the magnet device further comprises a fluid-driven energy transmission mechanism (5) which is coupled to the at least one magnet stack (4) to transmit a force to the at least one magnet stack (4) to at least partially transfer the at least one magnet stack (4) from the active position to the release position.

Description

TECHNICAL FIELD

[0001] The present invention relates to a switchable magnet device and system, comprising a housing and a switchable magnet device. BACKGROUND

[0002] A switchable magnet device is known from the utility model specification DE 29 920 866 U1. Therein, the switchable magnet device is a magnet device for fixing formwork elements of a prefabricated concrete component on a base plate. Therein, the magnet can be switched between a lowered position, in which the magnet rests against the base plate and fixes the position of the formwork element by magnetic force, and a raised position, in which the formwork element can be moved due to the reduced magnetic force. In order to switch to the raised position, a screw is screwed into the magnet, a sleeve with a head is located at the end of the screw, so that the element can be clamped.

[0003] However, in order to lift the magnet, a large force is required to overcome the magnetic force. For this purpose, only a tool located at the head, such as a lever, can be used to lift the magnet from the base plate. SUMMARY

[0004] The present invention is directed to the above-mentioned problem and the object of the present invention is to provide a switchable magnet device, which is simple to operate and reduces the strength expenditure of a user when lifting the magnet from the formwork support.

[0005] This object is achieved by a switchable magnet device.

[0006] According to one embodiment, a switchable magnet device comprises at least one magnet stack, which can be switched between an active position, in which the magnet stack is preferably magnetically functionally connected to a formwork support, preferably by contact with the formwork support, and a release position, in which the magnetically functional connection between the formwork support and the magnet stack is reduced, preferably cancelled. The magnet device further comprises a fluid-driven energy transmission mechanism, which is coupled to the at least one magnet stack, in order to transmit a force to the at least one magnet stack in order to at least partially transfer the at least one magnet stack from the active position to the release position.

[0007] The switchable magnet device thus comprises a fluid-driven energy transmission. By operating the energy transmission by means of a fluid, energy can be transmitted in a particularly efficient and reliable manner. The energy transmission can thus reliably exert a lifting force on the at least one magnet stack, which counteracts the magnetic force acting on the magnet stack as a result of the magnetic interaction with the formwork support. This force can at least partially support the switchover of the magnet stack, but preferably fully support the switchover of the magnet stack with a sufficiently large force. In particular, the fluid-driven energy transmission can also act as a force conversion mechanism. Here, a relatively small operating force of the user, which is exerted on the operating side of the energy transmission, can be converted into a relatively large lifting force. The operability of the magnet device is thus facilitated. In particular, on the operating side of the energy transmission, a relatively small operating force can be exerted over a relatively long distance, while a relatively large lifting force acts on the magnet stack side of the energy transmission over a relatively short distance. This is particularly advantageous for using the magnet stack, since the magnetic force already decreases significantly at a small distance from the formwork support, thus facilitating further removal of the magnet stack from the formwork support.

[0008] Preferably, the fluid-driven energy transmission is a hydraulic mechanism.

[0009] Here, an incompressible hydraulic fluid is used for the energy transmission. This ensures reliable energy transmission from the operating side of the energy transmission to the magnet stack side and thus facilitates the operability.

[0010] According to a further embodiment, the energy transmission can comprise at least one pressure application device, preferably at least one pump cylinder, for inputting energy into the fluid of the energy transmission.

[0011] By means of the pressure application device, the energy required for the transfer of the at least one magnet stack to the release position can be reliably input into the energy transmission by means of pressure. In particular, by means of the pressure application device, the lifting force acting on the at least one magnet stack can be controlled on the operating side.

[0012] The pressure application device is, for example, a linear actuator and / or preferably comprises a fixed part and a movable part. By means of this, an operating force can be easily exerted by operating the movable part.

[0013] Furthermore, the magnet device can comprise a lever device, which is coupled to the pressure application device, in particular to the movable part of the pressure application device. Preferably, the lever device is coupled to the movable part in such a way that an operating force can be exerted at an angle to the axis of the movement direction of the movable part, which is preferably the axis of the linear actuator. The lever device preferably extends further away from the center of rotation than the axis of the movement direction of the movable part. The coupling is preferably implemented in such a way that a linear movement of the movable part is allowed when the lever device is rotated. Thus, a large operating force can be easily exerted.

[0014] According to a further embodiment, the energy transmission mechanism can comprise at least one force transmission device, preferably a pressure cylinder, which is coupled to the at least one magnet stack for transmitting a force to the at least one magnet stack for at least partially transferring the at least one magnet stack from the active position to the release position.

[0015] By the coupling of the energy transmission mechanism at the force transmission device to the at least one magnet stack, the lifting force can be reliably transmitted to the at least one magnet stack.

[0016] In the switchable magnet device, at least one of the following features is preferably provided:

[0017] The force transmission device comprises a fixed part and a movable part, the movable part being coupled to the at least one magnet stack for transferring the at least one magnet stack between the active position and the release position.

[0018] The energy transmission mechanism, in particular the at least one force transmission device, is configured to transfer the at least one magnet stack in a translational manner between the active position and the release position, in particular in a direction perpendicular to the formwork support.

[0019] The force transmission device is designed as a linear actuator, in particular a pressure cylinder.

[0020] The movable part and / or the fixed part of the force transmission device can be arranged at least partially between the formwork support and the upper edge of the magnet stack, further preferably arranged overlapping the magnet stack as seen in a direction parallel to the formwork support. It is particularly preferred that the overlapping area between the movable part and the fixed part of the force transmission device as seen in a direction parallel to the formwork support is arranged at least partially between the formwork support and the upper edge of the magnet stack.

[0021] The coupling locations of the fixed part of the force transmission device are closer to the formwork support than the coupling locations of the movable part of the force transmission device to the at least one magnet stack, and / or at least one of the coupling locations is arranged between the formwork support and the upper edge of the magnet stack, and / or at least one coupling location at least partially overlaps the force transmission device in the direction of movement of the movable part of the force transmission device.

[0022] The at least one magnet stack comprises at least one accommodation portion which accommodates at least one part of the energy transmission mechanism. Preferably, the accommodation portion extends parallel to the formwork support, and / or the accommodation portion comprises a recess, which is particularly preferably arranged on the side of the magnet stack facing the formwork support.

[0023] By these features, the switchable magnet device can be designed compact.

[0024] Preferably, a plurality of force transmission devices is coupled to the at least one magnet stack.

[0025] Thus, the lifting force can be transmitted to the magnet stack at different positions of the at least one magnet stack. Thereby, it can be ensured that the magnet stack is uniformly transferred from the active position to the release position. In particular, the risk of occurring torques and acting on the magnet stack can be reduced.

[0026] Preferably, the energy transmission mechanism further comprises a fluid storage device which is coupled in fluid communication to the pressure application device and / or the force transmission device.

[0027] By means of the fluid storage device, a better control of the amount of fluid in the energy transmission mechanism can be achieved. Further, for example, the pressure application device can repeatedly apply pressure by providing fluid from the fluid storage device. Further, in case of an excessive pressure in the force transmission device, for example, the energy transmission mechanism can be protected from damage by discharging fluid to the fluid storage device.

[0028] According to a further embodiment, the energy transmission mechanism can further comprise a valve device which is arranged to prevent the transfer of the at least one magnet stack towards the active position.

[0029] Thereby, the at least one magnet stack can be reliably held in the active position. Thus, further elements for holding the magnet stack in the active position are not necessary, which contributes to a simplified structural configuration. In its simplest form, the valve device can comprise, for example, a non-return valve which is able to prevent a flow of fluid from the magnet stack side back to the operating side when the pressure is released on the operating side. However, the valve device can also comprise a multi-way valve, for example.

[0030] According to a further embodiment, the fluid-driven energy transmission mechanism can be coupled to a plurality of magnet stacks.

[0031] If a large magnetic force is required to fix the formwork in its position, a plurality of magnet stacks is usually provided. While according to the prior art each magnet stack has to be individually lifted with a tool, according to this embodiment, the energy transmission mechanism can simultaneously lift a plurality of magnets. In this way, the time for arranging the formwork can be saved and the configuration can be facilitated.

[0032] Preferably, the plurality of magnet stacks is arranged in parallel with respect to the fluid-driven energy transmission mechanism.

[0033] Here, a plurality of magnet stacks can be reliably and uniformly lifted, in particular under the same pressure. Further, a failure in a single fluid branch does not jeopardize the functionality of the other fluid branches, so that a single magnet stack can be reliably lifted.

[0034] According to a further advanced embodiment, the magnet device can comprise a magnet stack activation device which can be coupled with the at least one magnet stack at least for the transfer from the release position to the active position.

[0035] By means of the magnet stack activation device, which is arranged separately from the energy transmission mechanism, the user can activate the at least one magnet stack, i.e. move it into the active position, in particular easily. At the same time, the energy transmission mechanism can be moved into the starting position for the next switching operation.

[0036] According to a further advanced embodiment, the magnet device can further comprise at least one release support device configured to support the movement of the at least one magnet stack into the release position, wherein the release support device preferably comprises at least one elastic element, in particular a spring element, which is preferably coupled at one end side to the at least one magnet stack and at the other end side to the stationary part.

[0037] Thus, the user-applied operating force can be further reduced. Thus, an elastic element, for example a pressure spring, can be arranged between the template support and the magnet stack. The elastic force can support the movement away from the template support here. In particular when the magnet stack has been lifted from the template support by means of the energy transmission mechanism, the elastic force can overcome the remaining reduced magnetic force.

[0038] According to a further advanced embodiment, a system comprising a switchable magnet device according to one of the preceding embodiments and a housing, which at least partially receives the switchable magnet device therein, wherein at least a part of the pressure application device is accessible from the outside of the housing, in particular is arranged on the outside of the housing.

[0039] Here, the housing shields the at least one magnet stack, which is at least partially arranged inside the housing. This makes the structure more compact. Since at least a part of the pressure application device is accessible from the outside of the housing, the user can apply pressure to the fluid in a simple manner. This increases the ease of operation.

[0040] Preferably, the system comprises at least one limit stop, which, independently of the fluid-driven energy transmission mechanism, serves to define the active position.

[0041] In other words, the active position is not defined by the energy transmission mechanism. Thus, the load of the energy transmission mechanism at the active position can be avoided. Furthermore, the housing can be reliably pressed against the template support. BRIEF DESCRIPTION OF DRAWINGS

[0042] The application will be described in detail below with reference to the drawings.

[0043] Figure 1 The inventive system with the housing and the inventive magnet device is shown in a perspective view.

[0044] Figure 2 The inventive magnet device is shown in a perspective view, wherein the housing is omitted. Figure 1

[0045] ​Reference Symbol List

[0046] 1 System

[0047] 2. Switchable magnet device

[0048] 3. Outer shell

[0049] 4. Magnet stack

[0050] 5. Energy Transmission Mechanism

[0051] 51 Pressure Application Device

[0052] 52 Force Transmission Device

[0053] 53a, 53b piping

[0054] 54 knobs

[0055] 6. Static Part

[0056] 7. Magnet stack activation device

[0057] 71 Screw

[0058] 72 knobs

[0059] 8. Release support device

[0060] 81 Hollow cylindrical element

[0061] 9 sleeves Detailed Implementation

[0062] Figure 1 and Figure 2 A system 1 including a switchable magnet device 2 is shown. For example... Figure 1 As shown, system 1 also includes a housing 3. The housing 3 has openings on both sides along the longitudinal direction and has a C-shaped profile in cross-section. The housing 3 houses a switchable magnet device 2 between the legs of the profile.

[0063] In this embodiment, the magnet device 2 includes a magnet stack 4, which can... Figure 2 The diagram shows the transition between the active and release positions. In the active position, the magnet stack 4 is magnetically connected to a magnetizable template support (not shown), which can also be part of the system along with the magnet device 2. The template support is made of a ferromagnetic material and is therefore magnetizable. In the active position of the magnet stack 4, a magnetic force exists between the template support and the magnet stack 4, with a component force applied to the magnet stack 4 in the direction of the template support.

[0064] The magnet stack 4 comprises at least one permanent magnet. Preferably, as shown, the magnet stack 4 comprises a plurality of plate-shaped permanent magnetic elements arranged parallel to each other and spaced apart, and in between which ferromagnetic elements are arranged, which are preferably formed of a material comprising steel. As seen in Figure 2 , the ferromagnetic elements protrude from the permanent magnetic elements at both end sides in the direction of extension (parallel to the formwork support).

[0065] Furthermore, the switchable magnet device 2 comprises an energy transmission mechanism 5 (hydraulic mechanism) coupled with the magnet stack 4 to transmit forces to the magnet stack 4 for at least partially transferring the magnet stack 4 from the active position to the release position.

[0066] The energy transmission mechanism 5 comprises a plurality of linear actuators, i.e. cylinder elements, in particular a pressure device 51 (pump cylinder), and a plurality of force transmission devices 52 (pressure cylinders), and hydraulic pressure lines 53a and 53b connecting the plurality of force transmission devices 52 in fluid communication with the pressure device 51. As can be seen in Figure 2 , the plurality of force transmission devices 52 are arranged uniformly with respect to the substantially cuboid-shaped magnet stack 4. Thus, four force transmission devices 52, more precisely the coupling positions of the respective force transmission devices 52 with the magnet stack 4, are substantially arranged close to the corners of the cuboid-shaped magnet stack 4. The coupling positions are particularly arranged uniformly around the center of gravity of the magnet stack 4. The force transmission devices 52 are coupled with the magnet stack 4 at the ferromagnetic elements.

[0067] The pressure device 51 and the force transmission devices 52 each have a fixed part and a movable part.

[0068] The fixed part of the pressure device 51 is connected with or arranged on the housing 3 in a mechanical, form or material bond. The movable part is arranged movable with respect to the fixed part, e.g. a piston. The movable part can be operated by a user.

[0069] The respective fixed part of the force transmission devices 52 is connected with or arranged on the stationary part 6 of the system 1 in a mechanical, form or material bond. The stationary part 6 here is a construction plate bent down at both longitudinal ends and standing on the formwork support with the bent portions and is part of the housing, as can be seen in Figure 1 . The fixed part is thus coupled directly or indirectly to the formwork support. The movable part of the respective force transmission device 52 is arranged movable with respect to the fixed part and comprises a piston. The movable part is coupled to the magnet stack 4 or arranged in a mechanical, form or material bond, preferably in a material bond, wherein the magnet stack 4 is placed on the movable part. Here, the coupling position of the movable part with the magnet stack 4 overlaps the force transmission device 52 along the direction of movement of the movable part.

[0070] The fixed part and the movable part of the force transmission device 52 are each at least partially arranged between the upper edge of the magnet stack 4 and the formwork support, seen in a direction perpendicular to the formwork support. The fixed part and the movable part are arranged in an overlapping manner with the magnet stack 4, seen in a direction parallel to the formwork support or in a direction perpendicular to the direction of movement, respectively.

[0071] The movable part is at least partially movable along the linear direction of movement (axial direction perpendicular to the formwork support) between two end positions, preferably inside the fixed part. The overlapping area of the movable part and the fixed part of the force transmission device 52, seen in a direction perpendicular to the direction of movement or parallel to the formwork support, is at least partially arranged between the formwork support and the upper edge of the magnet stack at at least one of the two end positions.

[0072] The coupling position of the fixed part of the force transmission device 52 is arranged closer to the formwork support than the connection position of the movable part to the magnet stack 4.

[0073] In the pressure application device 51 and the force transmission device 52, the fixed part is divided into two spaces by the movable part, respectively. In the present case, both spaces of the pressure application device 51 and the force transmission device 52 are filled with hydraulic oil. Thus, all hydraulic cylinders are double-acting cylinders.

[0074] The space of each force transmission device 52 is connected to the space of the pressure application device 51 via a line 53a. The other space of each force transmission device 52 is connected to the other space of the pressure application device 51 via a line 53b. Thus, in the energy transmission mechanism 5, the force transmission devices 52 are connected in parallel.

[0075] Furthermore, the magnet device 2 comprises a magnet stack activation device 7, which comprises a screw 71, which is screwed into the magnet stack 4. The upper end of the screw 71 is provided with a knob 72 for operation by a user.

[0076] Furthermore, the magnet device 2 comprises a release support device 8. The release support device 8 comprises a substantially hollow cylindrical element 81, which is coupled to the magnet stack 4 and has a spring element inside, which is coupled at its lower end side to a stationary part and at its upper end side to the cylindrical element 81, such that a force is transmitted from the spring element to the cylindrical element 81 and thus to the magnet stack 4, which counteracts the magnetic force and thus supports the transfer of the magnet stack 4 into the release position.

[0077] The function of the above-described structure will be described in the following.

[0078] The switchable magnet device 2 comprises at least one magnet stack 4, which is switchable between an active position, in which the magnet stack 4 is magnetically functionally connected to the formwork support, and a release position, in which the magnetically functional connection between the formwork support and the magnet stack 4 is reduced. The magnet device 2 further comprises a fluid-driven energy transmission mechanism 5, here a hydraulic mechanism, which is coupled to the at least one magnet stack 4 in order to transmit a force to the at least one magnet stack 4 in order to at least partially move the at least one magnet stack 4 from the active position to the release position.

[0079] The user can press the movable part (piston) of the pressure device 51 from the starting position on the operating side downwards. In the process, pressure is exerted on the fluid located between the individual spaces of the force transmission device 52 connected via the line 53a and one space of the pressure device 51, which exerts a force on the magnet stack 4 via the movable part of the force transmission device 52, which moves the magnet stack 4 away from the formwork support in the vertical direction of the formwork support. Thus, the individual spaces of the force transmission device 52 connected via the line 53a and one space of the pressure device 51 form an operating hydraulic path via which the lifting force is transmitted to the at least one magnet stack 4 for at least partially moving the at least one magnet stack 4 from the active position to the release position.

[0080] The individual spaces of the force transmission device 52 connected via the line 53b and one space of the pressure device 51 form a tracking hydraulic path via which the fluid tracks the movable part of the pressure device 51 under the pressure of the movable part of the force transmission device 52.

[0081] Preferably, the total cross-sectional area of the movable part of the force transmission device 52 in contact with the fluid is greater than the cross-sectional area of the movable part of the pressure device 51 in contact with the fluid. Here, the hydraulic mechanism serves as a force conversion mechanism. Here, a relatively small operating force exerted by the user on the energy transmission mechanism can be converted into a relatively large lifting force. This contributes to the operability of the magnet device. In particular, on the operating side of the energy transmission mechanism, a relatively small operating force can be exerted over a relatively long distance, while a relatively large lifting force acts on the magnet stack side of the energy transmission mechanism over a shorter distance. This is particularly advantageous for the use of magnet stacks, since the magnetic force already decreases significantly at small distances from the formwork support, thus facilitating the further removal of the magnet stack from the formwork support.

[0082] The fluid-driven energy transmission mechanism is here a hydraulic mechanism.

[0083] Here, incompressible hydraulic fluid is used for the energy transmission mechanism. This ensures reliable energy transmission from the operating side to the magnet stack side of the energy transmission mechanism and thus promotes the operability.

[0084] Furthermore, the energy transmission 5 comprises a pressure device 51 as a pressure device for inputting energy into the fluid of the energy transmission.

[0085] By means of the pressure device 51, a pressure body can be reliably input into the fluid, so that the energy required for the transfer of the magnet stack 4 into the release position can be input into the energy transmission. The user can still manually or using a tool operate a movable part of the pressure device, so that the pressure can be controlled.

[0086] Furthermore, the energy transmission 5 comprises force transmission devices 52 as force transmission devices, which press the magnet stack 4 away from the template support. Here, the individual force transmission devices are at least partially subjected to the pressure of the magnetic force and the gravitational force. In particular, at least one overlap region is substantially subjected to the pressure between the movable part and the fixed part, as seen in the movement direction and perpendicular thereto. The force transmission devices 52 are coupled to the at least one magnet stack 4 for transmitting a force onto the at least one magnet stack 4 for at least partially transferring the at least one magnet stack 4 from the active position into the release position.

[0087] The pressure device 51 is also preferably formed as a pressure cylinder.

[0088] By coupling the energy transmission 5 at the force transmission devices 52 to the at least one magnet stack 4, in particular to the movable part of the force transmission devices 52, the lifting force can be reliably transmitted to the at least one magnet stack 4. The force transmission devices are preferably coupled to the magnet stack 4 such that they move uniformly with the magnet stack 4, preferably along a linear movement direction. It is particularly preferred that the movable part of the force transmission devices 52 is formed directly here, again preferably integrally with the magnet stack 4.

[0089] The force transmission devices 52 comprise a fixed part and a movable part, the movable part being coupled to the at least one magnet stack 4 for transferring the at least one magnet stack 4 between the active position and the release position. Since the movable part is movable relative to the fixed part in the movement direction, the transfer between the active position and the release position can be simply accomplished in the movement direction.

[0090] The energy transmission 5 is designed such that the at least one magnet stack 4 is transferred in a translational manner between the active position and the release position, in particular along a direction perpendicular to the template support. Thus, an arrangement can be provided in a compact manner, and the magnetic force decreases rapidly.

[0091] The force transmission devices 52 are designed as linear actuators, in particular force transmission devices. Thereby, a compact arrangement can also be provided.

[0092] The force transmission device, preferably the movable part and / or the stationary part, can be arranged at least partially between the template support and the upper edge of the magnet stack 4, likewise preferably at least partially arranged overlapping the magnet stack 4, as seen in the direction perpendicular and / or parallel to the template support. In particular, the overlapping area of the movable part and the stationary part of the force transmission device can be arranged at least partially between the template support and the upper edge of the magnet stack, as seen in the direction parallel to the template support, i.e. perpendicular to the direction of movement. Thereby, a compact arrangement can also be provided.

[0093] The coupling position of the stationary part of the force transmission device 52 is closer to the template support than the coupling position of the at least one magnet stack 4 of the movable part of the force transmission device 52. Furthermore, the coupling position of the stationary part is arranged at least partially between the template support and the upper edge of the magnet stack. The coupling position of the movable part to the magnet stack 4 overlaps the force transmission device at least partially along the direction of movement of the movable part of the force transmission device. Thereby, a compact arrangement can also be provided. The magnet stack 4 has four drillings which extend perpendicular to the template support and protrude through the part of the force transmission device 52. Thus, the magnet stack comprises recesses as accommodation portions for components of the energy transmission mechanism.

[0094] Furthermore, a plurality of force transmission devices 52 is coupled to the at least one magnet stack 4.

[0095] Thus, the lifting force can be transmitted to the magnet stack 4 at different positions of the at least one magnet stack 4. Thereby, it can be ensured that the magnet stack is uniformly transferred from the active position to the release position. In particular, if the force transmission devices are uniformly arranged around the center of gravity of the magnet stack, the risk of generating a torque and acting on the magnet stack can be reduced.

[0096] The plurality of force transmission devices 52 is arranged in parallel with respect to the fluid-driven energy transmission mechanism 5.

[0097] Here, the plurality of force transmission devices is able to reliably transmit the force with the same active pressure, thereby enabling a uniform lifting. Furthermore, a failure of an individual pipe 53a and 53b between the individual force transmission devices 52 and the pressure application device 51 does not endanger the function of the other pipes, thereby enabling a reliable lifting of the magnet stack 4.

[0098] Furthermore, the magnet device 2 comprises a magnet stack activation device in the form of a knob 72 and a screw 71, which can be coupled to the at least one magnet stack, at least for the transfer from the release position to the active position.

[0099] Thereby, the user can easily transfer the magnet stack 4 to the active position in particular. At the same time, the energy transmission mechanism 5 can be transferred to the starting position for the next switching operation. If the movable part of the pressure device 51 is in the lowered position at the release position of the magnet stack, the user can exert pressure on the knob 72, bringing the magnet stack 4 into the active position. At the same time, the working liquid drives the movable part of the pressure device 51 into the starting position in the operating hydraulic path due to the movable part of the energy transmission mechanism 5, in order to carry out a new switching operation.

[0100] Furthermore, the magnet device 2 comprises two release support devices 8, which are configured to support the transfer of the at least one magnet stack 4 to the release position, wherein the release support devices 8 comprise a spring element, which is coupled on one end side to the at least one magnet stack 4 and on the other end side to the stationary part 6.

[0101] Thus, the user-applied operating force can be further reduced. The spring force can support the movement away from the formwork support here. In particular when the magnet stack 4 has been lifted from the formwork support by the energy transmission mechanism 5, the spring force can overcome the remaining reduced magnetic force.

[0102] The system 1 comprises a housing 3, which at least partially receives the switchable magnet device 2 therein, wherein a part of the pressure device 51, i.e. the movable part of the pressure device 51 provided with the knob 54, is arranged outside the housing 3. The housing accommodates the magnet stack 4, the movable part of the pressure device 51, the force transmission device 52, as well as the lines 53a and 53b, and the release support devices 8 are at least partially located inside thereof and overlap these parts in the direction perpendicular to the formwork support.

[0103] Here, the housing 3 screens the at least one magnet stack 4, which is at least partially arranged inside the housing 3. This makes the structure compact. Since the knob 54 is accessible from outside the housing, the user can exert pressure on the fluid in a simple manner. This increases the ease of operation.

[0104] Preferably, the system 1 comprises at least one limit stop, which, independently of the fluid-driven energy transmission, defines the action position. This limit stop, for example, can be formed by the template support itself, on which the magnet stack 4 is placed. However, it is also possible to provide the limit stop on the housing. Thus, the housing bottom comprises a sleeve 9, on the bottom surface of which the knob 72 can rest and which, in the coupled state with the magnet stack 4, defines the action position. In other words, the action position is not defined by the energy transmission 5. In particular, neither the movable part of the pressure device 51 nor the movable part of the force transmission 52 touches the limit stop. Thus, a load of the energy transmission 5 at the action position can be avoided. Furthermore, the housing 3 can be reliably pressed against the template support. This means that, at the action position, the magnetic force is transmitted to the housing to press the housing against the template support.

[0105] The housing can be, for example, the housing of a box magnet or can also be an integral part of the template device.

[0106] The components of the energy transmission are preferably formed from non-magnetic material.

[0107] Modified embodiment

[0108] The at least one magnet stack can also comprise a receiving portion, which extends parallel to the template support. Here, a recess can be arranged on the side of the magnet stack facing the template support. Thus, the recess can be provided as a recess from the surface facing the template support. In other words, the receiving portion is located between the upper edge of the magnet stack and the template support.

[0109] For example, a part of the lines 53a and 53b can be arranged in the receiving portion. Thus, the arrangement becomes particularly space-saving. The receiving portion is preferably formed at least at the action position of the magnet stack 4 and accommodates parts of the energy transmission. Preferably, the receiving portion at least partially overlaps the parts of the energy transmission as seen in a direction parallel to the template support and perpendicular to the extension direction of the magnet stack. Thereby, a compact structure can also be maintained. The receiving portion is preferably formed from a ferromagnetic element or a non-magnetic element of the magnet stack. Thereby, adverse effects of the magnetic field and adverse effects caused by the magnetic field can be reduced.

[0110] The energy transmission can also be, for example, a pneumatic energy transmission. However, a hydraulic energy transmission is preferred due to the incompressibility of the hydraulic oil.

[0111] The plurality of force transmissions can also be connected in series with respect to the energy transmission, in particular one pressure device, wherein the spaces of the force transmissions can be coupled to one another in series. Thus, not every force transmission has to be connected with a pressure device. Rather, lines can be provided between the force transmissions. This makes the arrangement very compact and the pressure device can be arranged arbitrarily.

[0112] Instead of using a pressure cylinder as a pressure applying device and / or a force transmission device, a pull cylinder can also be used.

[0113] Even if not represented in the figures, the magnet device can comprise a lever device which can be connected to the pressure applying device 51, in particular to the movable part of the pressure applying device. The lever device can be coupled to the movable part in such a way that an operating force can be applied in a manner spaced apart from the axis of the direction of movement of the pressure applying device 51. The lever device is preferably extended further away from the centre of rotation than the axis of the direction of movement of the pressure applying device. The centre of rotation can be provided on a housing, wherein the lever device is coupled to the housing in a rotatable manner. The coupling to the pressure applying device is preferably implemented in such a way that a linear movement of the movable part is allowed when the lever device is rotated. Thus, a large operating force can be easily applied. Furthermore, the pressure applying device can also be a pump, for example a wing pump, instead of a hydraulic cylinder.

[0114] The energy transmission mechanism described above can also comprise a fluid storage device which is coupled to the pressure applying device and / or the force transmission device in a fluid-communicating manner. Thus, a better control of the amount of fluid in the energy transmission mechanism can be achieved. Furthermore, for example, the pressure applying device can repeatedly apply pressure by providing fluid from the fluid storage device. Furthermore, for example in the case of an excessive pressure in the force transmission device, the energy transmission mechanism can be protected from damage by discharging fluid to the fluid storage device. To this end, the energy transmission mechanism preferably comprises a pressure relief valve which couples at least a part of the operating channel to the fluid storage device.

[0115] Furthermore, the energy transmission mechanism 5 can comprise a valve device which is arranged to prevent the displacement of at least one magnet stack 4 towards the action position. Thus, a throttle valve can be provided in the operating path or the tracking path, wherein, when the throttle valve is closed, the fluid movement is blocked, thus maintaining the position of the magnet stack. The valve can also be a non-return valve.

[0116] However, for example, the valve device can also comprise a multi-way valve. If a fluid storage device is provided, a path of the valve can couple the force transmission device to the pressure applying device, while another path can couple the force transmission device to the fluid storage device. If a switch from one path to the other is made, the pressure of the force transmission device is maintained.

[0117] Furthermore, the hydraulic cylinder does not necessarily have to be an embodiment which acts on both sides. The use of a hydraulic cylinder which acts on one side only can also be considered, so that only the operating path needs to be formed and the use of a pipe 53b is not necessary.

[0118] Furthermore, the fluid-driven energy transmission mechanism can be coupled to a plurality of magnet stacks arranged in series or in parallel.

[0119] If a large magnetic force is required to fix the template in its position, then usually a plurality of magnet stacks is provided. While according to the prior art each magnet stack has to be lifted individually with a tool, according to this embodiment the energy transmission means can lift a plurality of magnets simultaneously. In this way, the time for arranging the template can be saved and the arrangement can be facilitated.

[0120] Preferably, the plurality of magnet stacks is arranged parallel with respect to the fluid-driven energy transmission means.

[0121] Here, the plurality of magnet stacks can be reliably and uniformly lifted, in particular under the same pressure. Furthermore, a failure in a single fluid branch does not endanger the function of the other fluid branches, so that a single magnet stack can be reliably lifted.

[0122] A further embodiment of the application relates to a method, wherein at least one magnet stack is at least partially transferred from an action position to a release position by means of a fluid-driven energy transmission means.

[0123] In the present disclosure, "at least" also includes the respective totality if the present disclosure does not teach otherwise.

Claims

1. A switchable magnet device (2), comprising: at least one magnet stack (4), which can be transferred between an active position, in which the magnet stack (4) is magnetically functionally connected to a formwork support, and a release position, in which the magnetically functional connection between the formwork support and the magnet stack (4) is reduced, wherein the magnet device (2) further comprises a fluid-driven energy transmission mechanism (5), which is coupled to at least one of the magnet stacks (4) for transmitting a force to at least one of the magnet stacks (4) for at least partially transferring at least one of the magnet stacks (4) from the active position to the release position, characterized in that at least one of the magnet stacks (4) comprises at least one accommodation portion, which accommodates at least a portion of the energy transmission mechanism (5) therein.

2. The switchable magnet apparatus (2) according to claim 1, characterized in that The fluid-driven energy transmission mechanism (5) is a hydraulic mechanism.

3. The switchable magnet apparatus (2) according to claim 1 or 2, characterized in that The energy transmission mechanism (5) comprises at least one pressure device (51) for inputting energy into a fluid of the energy transmission mechanism (5).

4. The switchable magnet apparatus (2) according to claim 1 or 2, characterized in that The energy transmission mechanism (5) comprises at least one force transmission device (52), which is coupled to at least one of the magnet stacks (4) for transmitting a force for at least partially transferring at least one of the magnet stacks (4) from the active position to the release position.

5. The switchable magnet apparatus (2) according to claim 4, characterized in that The force transmission device (52) comprises a stationary portion and a movable portion, which is coupled to at least one of the magnet stacks (4) for transferring at least one of the magnet stacks between the active position and the release position, and / or The stationary portion of the force transmission device (52) is configured to be arrangeable between a formwork support and an upper edge of a magnet stack, and / or The coupling position of the stationary portion of the force transmission device (52) is configured to be arranged closer to the formwork support than the coupling position of the movable portion of the force transmission device (52) to at least one of the magnet stacks.

6. The switchable magnet apparatus (2) according to claim 4, characterized in that A plurality of the force transmission devices (52) is coupled to at least one of the magnet stacks (4).

7. The switchable magnet apparatus (2) according to claim 4, characterized in that The energy transmission mechanism (5) further comprises a fluid storage device, which is coupled in fluid communication to the pressure device (51) and / or the force transmission device (52) for inputting energy into a fluid of the energy transmission mechanism (5).

8. The switchable magnet apparatus (2) according to claim 1 or 2, characterized in that The energy transmission mechanism (5) further comprises a valve device, which is arranged to prevent a transfer of at least one of the magnet stacks (4) towards the active position.

9. The switchable magnet apparatus (2) according to claim 1 or 2, characterized in that The fluid-driven energy transmission mechanism (5) is coupled to a plurality of the magnet stacks (4).

10. The switchable magnet apparatus (2) according to claim 9, characterized in that The plurality of the magnet stacks (4) is arranged in parallel with respect to the fluid-driven energy transmission mechanism (5).

11. The switchable magnet apparatus (2) according to claim 1 or 2, characterized in that The magnet device (2) further comprises a magnet stack activation device (7), which is couplable to at least one of the magnet stacks (4) for transferring from the release position to the active position.

12. The switchable magnet apparatus (2) according to claim 1 or 2, characterized in that The magnet device further comprises at least one release support device (8), which is configured to support a transfer of at least one of the magnet stacks (4) into the release position.

13. Switchable magnet device (2) according to claim 1 or 2, characterized in that the accommodation portion is formed to extend parallel to the template support, and / or the accommodation portion comprises a recess.

14. A switchable magnet system, characterized by comprising: a switchable magnet device (2) according to any of the preceding claims 1 to 13, and a housing (3) at least partially accommodating the switchable magnet device therein, wherein at least a portion of the pressure application means (51) according to claim 3 is accessible from the outside of the housing (3).

15. The switchable magnet system of claim 14, wherein, comprising at least one limit stop, independent of the fluid-driven energy transmission mechanism (5), to define the action position.

Images