Sliding door, in particular lift sliding door, having opening aid for sliding leaf

Abstract

The invention relates to a sliding door, in particular a lift-type sliding door, which can be mounted in the vertical direction into an opening of a building, having at least: a frame fixed to the building, in which at least one sliding leaf is movably guided; at least one sliding sash has a sash frame into which the planar element is inserted; the opening assisting device is used for assisting opening of the at least one sliding sash; wherein:-the opening aid is designed to preload the spring on a spring tension path during the closing of the sliding leaf; -the total sliding path of the sliding sash is multiple times the auxiliary sliding path of the sliding sash in the opening direction, on which the sliding sash is assisted by the opening aid; and-the opening aid is designed in such a way that a decrease in the operating force for opening the sliding sash by means of the opening aid on the auxiliary sliding path is always greater than an increase in the operating force for pushing back the sliding sash from the open position into the closed position on the spring tension path.

Description

Technical Field

[0001] The present invention relates to a sliding door having an opening auxiliary device for the sliding fan, according to the preamble of claim 1. Background Technology

[0002] The trend in the construction industry is toward increasingly larger sliding doors and lift-up sliding door systems in order to allow more sunlight into the interior, enable better views outwards, or improve the aesthetic appearance of buildings in modern architecture.

[0003] This results in a high weight for the sliding panels of such door systems. Furthermore, the thermal and / or sound insulation, sealing, and fire resistance of such door systems have become increasingly important. The use of multi-layered glass (increasingly triple or more layers), optimized sealing, and frame construction with integrated fire-resistant components also contribute to the weight of the sliding panels of such door systems. The interaction of these factors, especially when manually pushing the door from the closed position, results in high operating forces, which is undesirable.

[0004] Opening aids for sliding panels of sliding doors or lift-type sliding doors are known from the prior art.

[0005] Document EP 1 555 369 B1 of this type illustrates such an opening assistance device. The corresponding sliding panel of the lift-type sliding door device is assisted in opening by a mechanism. The sliding panel is pushed open using the force applied to it by the lifting motion via a ramp. The force required for the opening assistance is generated by a tension spring, which acts as a force accumulator and, via a rope transmission device, acts on the corresponding ramp and thus on the sliding panel. The spring is tensioned by the closing motion of the sliding panel. A disadvantage of this solution is that the force required to tension the spring is very large. Therefore, while this solution makes the opening process easier, it significantly increases the difficulty of the closing process.

[0006] Document DE 10 2021 104 797 A1 discloses another solution in the prior art, but it also fails to solve the problem. According to document DE 10 2021 104 797 A1, a recessed groove with a deepened structure exists in the slide rail—on which the sliding fan moves. The pulley of the movable carriage enters this recessed groove in the closed position of the sliding fan when the force accumulator is loaded, and moves out from the closed position to the open position when the force accumulator is unloaded and the sliding fan is lifted. To load the force accumulator, the sliding fan or movable carriage is loaded by a push unit located in the direction of movement of the pulley and guided parallel to the direction of movement when it moves into the recessed groove. This push unit compresses the force accumulator, which is also oriented parallel to the direction of movement. Summary of the Invention

[0007] Therefore, the objective of this invention is to provide an opening aid for the sliding panel of a sliding door or lift-type sliding door, which at least partially overcomes the aforementioned problems. Specifically, it is possible to keep the operating force for the sliding panel relatively small through the opening aid.

[0008] This task is solved by the subject matter of claim 1.

[0009] Therefore, a sliding door, which can also be a lift-type sliding door, is proposed. The sliding door can be installed vertically into a building opening. This sliding door has at least the following features: a frame that can be fixedly mounted to the building; at least one sliding panel that is movably guided within the frame along a main sliding path; the at least one sliding panel having a panel frame into which planar elements are inserted; and the sliding panel further having an opening assist device for assisting in opening the at least one sliding panel along an auxiliary sliding path in the opening direction; wherein the opening assist device has a spring as a force and / or torque accumulator. This sliding door is optimized such that the opening assist device is designed to pre-tension the spring on the spring tension path during the closing of the sliding panel; and the opening assist device is designed such that the reduction in the operating force for opening the sliding panel using the opening assist device on the auxiliary sliding path is always greater than the increase in the operating force when pushing the sliding panel back on the spring tension path.

[0010] Claim 1 proposes an opening aid for sliding doors, particularly lift-type sliding doors, designed such that the opening process of the sliding panel—that is, overcoming the static friction of the seals and the inertial force of the sliding panel in motion, which primarily involves acceleration from a stationary state in the closed position—can be achieved with a small pushing force applied by the operator. Although the force required to be applied during the push-back action is increased by the tension of the spring, the increased pushing force is only relatively small due to the long path used to tension the spring. This is because the reduction (or its magnitude) of the operating force required to open the sliding panel using the opening aid along the auxiliary sliding path is always greater than the increase in operating force required to push the sliding panel back along the spring tension path.

[0011] This leads to the development of a sliding door, particularly a lift-type sliding door, which allows for exceptionally comfortable operation by the user. Furthermore, this also meets requirements for high operational force, such as Type 3 of standard DIN EN 12217, which is a prerequisite for accessible buildings according to DIN 1840-1.

[0012] Here, according to an advantageous alternative design, the opening assist device can be configured to preload the spring during the closing of the sliding fan, and the total sliding path of the sliding fan along the opening direction is multiple times the sliding path, on which the opening assist device assists the sliding fan. Thus, assistance can be provided when needed in the first segment of the opening path. Furthermore, it is advantageous to maintain a small operating force when the sliding fan slides from the open position to the closed position. This will be further explained below.

[0013] When the opening assist is activated, some or all of the spring stored in the spring can be used for the opening assist. Therefore, the opening assist device is designed to preload the spring during the closing of the sliding fan so that the spring can be re-tensioned along the entire path or a portion of the path when the sliding fan closes or pushes back from the opening path. This path is called the spring tension path, and thus it can be reused for the opening assist during the next opening process.

[0014] According to another particularly preferred embodiment of the invention, the total sliding path (sF) of the sliding fan can be set to be preferably 8 to 30 times larger than the auxiliary sliding path. Particularly preferably, the total sliding path can even be set to be 15 to 25 times larger than the auxiliary sliding path. This path ratio also advantageously ensures that the operating force required to move the sliding fan from the open position to the closed position remains relatively small when the spring is re-tensioned. Furthermore, the opening auxiliary device is advantageously and specifically designed to reduce the maximum force that the operator must apply when opening the sliding fan.

[0015] Another advantageous embodiment of the invention can be configured such that the opening auxiliary device is partially or fully inserted into the profile of the upper horizontal beam of the fan frame. Its space-saving placement there, and particularly simple, achieves the advantageous functionality according to claim 1 and, in particular, also according to the dependent claims.

[0016] According to another advantageous embodiment of the invention, the opening auxiliary device can be configured to have an operating mechanism and a transmission device. This operating mechanism enables simple and operator-familiar operation of the sliding fan, as well as operation of the opening auxiliary device that is not directly visible to the operator. The transmission device is an advantageous solution for saving structural space, significantly reducing the operating force required to move the sliding fan from the open position to the closed position compared to solutions known in the prior art, and enabling the pre-tensioning of the torque accumulator along the entire sliding path of the sliding fan.

[0017] According to another advantageous embodiment of the invention, the spring can be configured as a helical torsion spring. This results in a torque accumulator with an advantageously compact structure for opening the auxiliary device.

[0018] According to another advantageous embodiment of the invention, the force or torque applied by the helical torsion spring can be set such that the force or torque cannot push the sliding fan open on its own. Thus, the sliding fan has an opening characteristic that is habitual and therefore predictable for the operator.

[0019] According to a particularly preferred embodiment of the invention, the helical torsion spring is adjustable in its characteristics, particularly its preload. Thus, the spring can be easily adapted to different sliding sections.

[0020] In another particularly preferred embodiment of the invention, a pre-tensioned helical torsion spring can be configured to drive a drive gear by releasing it. This drive gear is operatively connected to a first rack disposed and fixed in the frame, thus assisting the opening movement of the sliding fan. The helical torsion spring, acting as a torque accumulator, in conjunction with the rack-and-pinion transmission formed by the drive gear and rack, achieves an advantageously compact and robust actuator for the sliding fan, which optimally assists the opening movement of the sliding fan.

[0021] By engaging a clamping gear with a second rack during the preload of the helical torsion spring, the second rack being fixed to the frame in the extension of the first rack, a simple, advantageously compact and robust actuator is achieved for preloading the helical torsion spring.

[0022] According to another advantageous embodiment of the invention, the transmission device can be configured to have a total transmission ratio of 1:sF (mm / 10), and preferably in multiple stages, particularly preferably in three stages. This achieves the condition that the operator requires only a small increase in moving force when the fan is closed compared to when the sliding fan is open.

[0023] Furthermore, it is advantageous that the transmission device engages with the clamping gear during the closing of the sliding fan. This allows the operator to exert only a slight additional effort when the fan is closed compared to when it is open.

[0024] In another particularly preferred embodiment of the invention, the clamping gear can be configured to act on the transmission via a spring-loaded ratchet mechanism. The ratchet mechanism effectively protects the helical torsion spring from excessive preload angles, and also serves to decouple the clamping gear from the transmission when the sliding fan is open.

[0025] Advantageously, the opening auxiliary devices are each inserted into the profile of the upper horizontal sash frame beam. Thus, the opening auxiliary devices are located outside the visible area of ​​the sliding sash.

[0026] According to a particularly preferred embodiment of the invention, the opening aid has a housing, which may be composed of a first housing half and a second housing half, and the first housing half and the second housing half are preferably assembled into a housing by screws in the assembled state of the opening aid. This optimized two-part design of the housing allows for advantageously simple assembly of the opening aid.

[0027] In another particularly preferred embodiment of the invention, the opening assist device can be designed such that the generated forces and torques act within the opening assist device itself, so that no force or torque is applied to the sash frame or / or the frame. Thus, the sliding sash experiences no force or mechanical stress except for the short time period for opening or closing, which advantageously affects the lifespan of the sliding sash.

[0028] Furthermore, according to another particularly preferred embodiment of the invention, the operating mechanism is designed such that the opening auxiliary device can only be activated when the sliding fan is locked by the handle and when it is unlocked from the locked state by the handle. This prevents the opening auxiliary device from being activated without a pre-tensioned helical torsion spring.

[0029] Furthermore, according to another particularly preferred embodiment of the invention, the operating mechanism of the opening auxiliary device can be configured such that the movement of the vertically movable locking lever is transmitted to the rocker, the rocker having a triangular guide groove in the region at its upper free end, the guide groove preferably being molded onto the rocker in one piece. Thus, a simple construction is achieved to operate the opening auxiliary device using a standard-compliant locking lever.

[0030] According to another advantageous embodiment of the invention, a release pin fixed to the frame can be provided as a support for the rocker arm. This results in a simple, compact, and thus inconspicuous support for the rocker arm, allowing the rocker arm to transmit the operating force applied by the locking lever to the opening auxiliary device without avoiding it.

[0031] In another particularly preferred embodiment of the invention, the guide groove can be configured to cooperate with a spring-loaded slider, which acts on the pawl. Thus, a simple construction is achieved to change the direction of the operating force.

[0032] Furthermore, according to another particularly preferred embodiment of the invention, the pawl can be configured to have a first arm and a second arm, each with a notch machined into the respective arm and a locking hook extending into the corresponding notch. Thus, a robust pawl is achieved with a simple construction.

[0033] Similarly, according to another particularly preferred embodiment of the invention, a drive gear, together with the helical torsion spring and the first gear of the transmission device, can be provided on the drive gear shaft. Thus, a compact mechanism for pre-tensioning the helical torsion spring is achieved on the one hand, and an equally compact actuator for opening the auxiliary device is achieved on the other.

[0034] According to a particularly preferred embodiment of the invention, each drive gear shaft is rotatably and height-movably supported in a guide within a corresponding housing half of the housing. The different height positions of the drive gear shafts and thus the drive gears simply achieve the preconditions for engaging the drive gear with the first rack to drive the sliding fan during its opening movement, and disengaging this engagement to prevent the sliding fan from being driven during its opening movement.

[0035] Furthermore, advantageously, in the locked and closed positions of the sliding fan, the drive gear shaft is held in the lower position within the corresponding recess by a corresponding locking hook, and the drive gear is operatively connected to the first gear and the transmission device while simultaneously decoupled from the first rack. Thus, no force from the opening auxiliary device acts on the fan frame and / or the door frame.

[0036] Furthermore, according to another particularly preferred embodiment of the invention, by operating the handle of the sliding fan, the locking lever moves downward, thereby causing the guide groove of the rocker arm to slide to the head of the slider. The slider moves in the opening direction of the sliding fan, thereby causing the pawl and its corresponding locking hook to move in the opening direction of the sliding fan. The corresponding locking hook then releases the drive gear shaft, allowing the drive gear shaft to move vertically upward. This compact mechanism ensures robust vertical adjustability of the drive gear shaft.

[0037] Furthermore, according to another particularly preferred embodiment of the invention, the vertical movement of the drive gear shaft in the axial direction can be assisted by two springs. This results in a simple construction and robust assistance in realizing the movement of the drive gear shaft.

[0038] Another particularly preferred embodiment of the invention may also be provided, in which the rack has a hinged connection through which the first oscillating section of the rack is guided obliquely downward, such that after the drive gear is no longer operatively connected to the transmission, the teeth of the drive gear engage with the teeth of the first oscillating section of the first rack. The hinged connection, with its simple construction, ensures that the drive gear reliably engages with the rack and also reliably compensates for any installation tolerances that may exist in the housing of the opening auxiliary device.

[0039] Furthermore, in another particularly preferred embodiment of the invention, the opening auxiliary device can be configured to be detachable as a single component. This facilitates the recycling of pure materials.

[0040] It should be noted that the opening auxiliary device can also be used as a closing auxiliary device, because similar or at least similar problems can occur during the closing of the sliding fan as in the opening case; see [reference needed]. Figure 2cTherefore, in the context of this document, the closing process can be considered as an opening process in this design. Re-tensioning is achieved in the open state, and thus can be considered as closing in another descriptive sense. The claims, the following description, the drawings, and the claims themselves can also be applied to such embodiments.

[0041] Further advantageous embodiments of the invention can be derived from the remaining dependent claims. Attached Figure Description

[0042] The invention is further described below with reference to the accompanying drawings and various embodiments. The invention is not limited to these embodiments, but may be implemented in other ways, either literally or equivalently. In particular, features of the embodiments described below can also be used in other embodiments not shown below.

[0043] The attached diagram shows:

[0044] Figure 1 Front view of a door device with a sliding sash and fixed side members;

[0045] Figure 2: In Figure 2a The image shows a partial magnification of the upper left corner of a lift-type sliding door with opening assistance. Figure 2b (shown in) Figure 2a A partially magnified spatial view, in Figure 2c The image shows a partial enlargement of the upper left corner / upper handle side corner of a lift-type sliding door with a first opening assist device and a partial enlargement of the upper right corner / upper hook side corner of a lift-type sliding door with a second opening assist device, which serves as a closing assist device;

[0046] Figure 3: In Figure 3a The exploded view of the opening auxiliary device is shown in the figure. Figure 3b The force-path diagram shown in the figure exemplifies the relationship between force and path on the sliding panel of a lifting sliding door, both without and with such an opening aid.

[0047] Figure 4: In Figure 4a (shown in) Figure 3a The opening auxiliary device in the corresponding closed and locked positions of the sliding fan, in Figure 4b (shown in) Figure 3a The sliding fan opening aid in the () has an unlocking mechanism. Figure 4c The diagram shows the situation when the sliding fan is pushed. Figure 3a The opening auxiliary device in ) Figure 4d The diagram shows the opening width of the sliding fan after reaching 100 mm. Figure 3a The opening auxiliary device in ) Figure 4eThe diagram shows the situation when the sliding fan continues to be pushed open. Figure 3a The opening auxiliary device in ).

[0048] An embodiment is described in the following description with accompanying drawings. The various features of this embodiment can also be combined with embodiments not shown and are each suitable as one or more advantageous designs within the scope of the independent and dependent claims. The terms "sliding fan" or "sliding door" are also used interchangeably with the terms "lift-up sliding fan" or "lift-up sliding door".

[0049] Terms used in the accompanying drawings, such as “upper,” “lower,” “right,” “left,” “horizontal,” “vertical,” “inner,” or “outer,” refer to the views in the drawings. The coordinate systems in the accompanying drawings are used here for further orientation. Detailed Implementation

[0050] exist Figure 1 The image shows a sliding door 1. The sliding door 1 has a frame-type door frame 2, which is structurally fixed in the installed state, and at least one sliding sash 3 that is slidably guided within the door frame 2—for example, by means of rollers on a track or a track on rollers (not shown here). The door frame 2 is configured as a surrounding door frame. The sliding sash 3 is in the closed position (depicted in the image) within the door frame 2 or within the frame. Figure 1 The sliding fan 3 is slidable or movable between the open and closed positions. The sliding fan 3 can preferably be locked in its closed position.

[0051] The opening direction of sliding fan 3 is as follows, depending on... Figure 1 The positive x-direction of the coordinate system in the figure coincides, while the closing direction of sliding fan 3 corresponds to the negative x-direction.

[0052] In the lower area, the frame 2 can be designed to be inserted into a recess in the ground. The frame 2 can function as a threshold in the ground area or be designed as such a threshold elsewhere.

[0053] The sliding door 1 may have at least one additional sliding panel and / or a fixed, immovable glass panel 4 in addition to the slidably guided sliding panel 3. The sliding panel 3 is pushed against the fixed glass panel 4 before opening (in... Figure 1 (From center to right). The sliding fan 3 preferably has a surrounding fan frame 5 and a planar element 6 inserted into the fan frame 5, the planar element being, for example, an insulating glass plate. Such a planar element 6 is on the main plane (in... Figure 1 Extends in the xy-plane.

[0054] The sliding fan 3 can be manually moved from its closed position to its open position relative to the frame 2 using a handle (not shown) and from that open position back to its closed position.

[0055] The sliding fan 3 can be particularly supported, on pulleys, in the frame 2 at the bottom of the frame or the lower part of the frame 2, by one or more of its edges—here, by the fan frame 5—and horizontally, i.e., parallel to the frame. Figure 1 The guide rail extends along the x-axis in the coordinate system for opening and closing (not shown here). In the design of a lift-type sliding door, the sliding panel 3 is first lifted and then moved. Alternatively, the sliding panel 3 can also be slidably supported on pulleys in the frame 2 on a horizontally extending guide rail at the bottom for opening and closing, without the need for pre-adjustment of height if necessary.

[0056] like Figure 2a As shown in the other accompanying figures, along the opening direction in the auxiliary sliding path The upper part is provided with an opening auxiliary device 100 for at least one sliding fan 3 (see for details). Figure 3b ).

[0057] Because in sliding doors, the sliding panel can be equipped with a surrounding seal (not shown in detail here). In order to move the sliding panel out of this sealing plane and push it to a certain speed, a relatively high force should be applied over a short path. Here, the auxiliary device 100 is activated to assist the user.

[0058] The auxiliary device 100 has a spring as a force or torque accumulator, whose energy is converted into the kinetic energy of the sliding fan when the auxiliary device is activated.

[0059] In addition, the opening auxiliary device 100 is also designed to pre-tighten the spring on the spring tensioning path during the closing of the sliding fan 3.

[0060] Subsequently, it was also set that the total sliding path sF of sliding fan 3 along the opening direction is the auxiliary sliding path of sliding fan 3. The sliding fan is assisted by the opening auxiliary device 100 on the auxiliary sliding path, which is many times larger than the sliding fan.

[0061] Furthermore, the opening auxiliary device 100 is designed in such a way that the operating force required to open the sliding fan 3 using the opening auxiliary device 100 on the auxiliary sliding path is reduced. It is always greater than the increase in the operating force (ΔFFs) of pushing the sliding fan 3 back from the open position to the closed position when the spring is re-tensioned on the spring tensioning path.

[0062] This can be achieved in different ways. A preferred embodiment is shown in the accompanying drawings.

[0063] It should be noted again here that the opening auxiliary device 100 described below can also be used as the closing auxiliary device 100a, because similar or at least similar problems may occur during the closing of the sliding fan 3 as in the opening case, for which see Figure 2c Therefore, the closing process in this design can be considered as the opening process. Re-tensioning occurs while the device is open, which can then be considered as closing in another descriptive sense.

[0064] exist Figure 2a and 2b The image shows the upper left corner of a lift-type sliding door 1 with an opening aid 100 in this exemplary embodiment. The opening aid 100 can here advantageously—because of its compactness and space-saving design—into the profile 7 of the upper horizontal sash frame beam 8.

[0065] The basic components—especially the transmission mechanism which will also be described—can be inserted into the profile 7 of the upper horizontal fan frame beam 8 of the fan frame 5.

[0066] To allow the opening aid 100 to be inserted into the profile 7, an opening can be introduced into the profile 7. For better visibility, the covering component is not shown here. Therefore, the opening aid 100 is concealed within the profile 7 of the upper horizontal fan frame beam 8.

[0067] The opening auxiliary device 100 (and the closing auxiliary device 100a) can be used to retrofit existing sliding doors or lift-type sliding doors 1. The opening auxiliary device can also be installed directly when constructing a sliding door.

[0068] The sliding panel 3 of the lifting sliding door 1 is in Figure 2a and Figure 2b In the view, it is located in the closed and sunken position. Sliding fan 3 is therefore closed. The auxiliary device 100 is therefore not triggered.

[0069] In addition, Figure 2a and Figure 2b The diagram shows the operating mechanism 101 for opening the auxiliary device 100. A locking lever 102—operated by the movement of a handle (not shown here)—is used to unlock, lift, and open the sliding fan 3, and the movement of the handle can be transmitted vertically or about [the area]. Figure 2a Or Figure 2b The corresponding coordinate system in the motion parallel to the y-axis—the upper end of which can be tightly fitted with a rocker arm 103. This rocker arm can be set to transmit the motion of the locking lever 102 to the rocker arm 103.

[0070] The rocker arm 103 may have a guide groove 104, exemplarily triangular, in the region of its free end. The guide groove 104 may preferably be molded onto the rocker arm 103 in one piece. A release pin 105 fixed to the frame 2 may be provided as a support for the rocker arm 103. With the release pin 105, the guide groove 104 may not shift laterally during vertical movement in the shown position of the sliding fan 3.

[0071] The guide groove 104 cooperates with the spring-loaded slider 106. The slider 106 has a mushroom-shaped head 107 and acts on a U-shaped pawl 108. Notches 110a and 110b are machined into the two arms 109a and 109b of the U-shaped pawl 108, respectively. A locking hook 111a and 111b extends into the corresponding notch 110a and 110b.

[0072] In the locked position of sliding fan 3—it is in Figure 2a and Figure 2b As shown in the diagram, the guide groove 104 is located above the mushroom-shaped head 107 of the release pin 105 and the slider 106.

[0073] A drive gear 113 along with a spring is mounted on the drive gear shaft 112—the spring is here implemented as a helical torsion spring 114 (not shown here, see [link]). Figure 3a —and the first gear 115 of the transmission 116. The transmission 116 is implemented here as a gear transmission. Preferably, the drive gear shaft 112, drive gear 113, and first gear 115 are implemented in one piece and made of plastic material. The drive gear shaft 112 is respectively located in guides 117a, 117b (not shown here, see Figure 3a The drive gear shaft 112 is rotatably and vertically movable within the shaft. That is, the drive gear shaft 112 is also supported vertically or about the shaft. Figure 2a and in Figure 2b The corresponding coordinate system in the graph is movable and parallel to the y-axis.

[0074] In the locked and closed positions of the sliding fan 3, the drive gear shaft 112 is held in its lower position within the corresponding recesses 110a and 110b by the corresponding locking hooks 111a and 111b. The drive gear 113 is thus operatively connected to the first gear 115 and therefore to the transmission 116, while simultaneously being decoupled from the first rack 118. The first rack 118 will be further described below.

[0075] If the handle of the sliding fan 3 is operated, the locking lever 102 moves downward. As a result, the guide groove 104 of the rocker arm 103—which represents an extension of the locking lever 102—slides onto the mushroom-shaped head 107 of the slider 106, thereby causing the slider 106 to move in the opening direction of the sliding fan 3 or along the direction relative to the... Figure 2aand in Figure 2b The coordinate system moves in the positive x-direction. This causes the U-shaped pawl 108 and its corresponding locking hooks 111a and 111b to move in the opening direction of the sliding fan 3. The corresponding locking hooks 111a and 111b then release the drive gear shaft 112, thereby driving the gear shaft 112 to move vertically upwards or along the direction of the opening of the sliding fan 3. Figure 2a and in Figure 2b The coordinate system in the figure shows the positive y-direction motion. The upward vertical motion of the drive gear shaft 112 is assisted by two springs, which are implemented here as leaf springs 119a and 119b (not shown here, see [link]). Figure 3a ).

[0076] Thus, the drive gear shaft 112, together with the helical torsion spring 114 and the drive gear 115, is decoupled from the transmission device 116 and becomes operatively connected to the first rack 118 on the frame 2. To prevent the drive gear 115 from rotating freely during this movement, the first swingable section 120 of the rack 118 is guided obliquely downward via the hinge connection 121. Thus, after the drive gear 115 is no longer operatively connected to the transmission device 116, the teeth of the drive gear 115 mesh with the teeth of the first swingable section 120 of the first rack 118.

[0077] The operating mechanism 101 is designed such that the opening auxiliary device 100 can only be activated when the sliding fan 3 is locked by the handle and when it is unlocked by the handle from the locked state. This will be further explained below.

[0078] exist Figure 2c As shown, the opening auxiliary device 100 can also be used as the closing auxiliary device 100a. As the closing auxiliary device 100a, it is inserted into the sliding fan 3 at the corner of the upper right frame.

[0079] exist Figure 3a An exploded view of the opening aid 100 is shown. The opening aid 100 has a housing, which is composed of a first, here front housing half 122a and a second housing half 122b, which are assembled into a housing by screws in the assembled state of the opening aid 100.

[0080] The auxiliary device 100 is designed such that its auxiliary sliding fan 3 accelerates from a stationary state in its closed position and slides along a defined sliding path, here 100 mm (see...). Figure 3b Further opening process. 100 mm should be understood as exemplary. Importantly, the auxiliary sliding path is sized such that the sliding fan 3 is accelerated out of one or more normally present sealing planes of the frame 2 and the static friction between the seal and the sliding fan 3 is overcome, as well as the inertia that restrains the movement of the sliding fan 3 is overcome.

[0081] When the opening assist is engaged, some or all of the spring energy stored in the spring, specifically the helical torsion spring 114, is used to engage the opening assist. Therefore, it is configured that the opening assist device is re-tensioned on the spring tension path during the closing of the sliding fan to pre-tension the spring—this path is also referred to as the spring tension path in this document—so that it can be reused for the opening assist during the next opening process.

[0082] The sliding path of the sliding fan 3, assisted by the opening aid 100, is chosen such that, with the helical torsion spring 114 preloaded, a correspondingly small moving force must be applied during the closing movement of the sliding fan 3 along a preferably significantly longer spring tension path. This is exemplarily approximately 2000 mm during the closing movement of the sliding fan 3 (see [link]). Figure 3b The sliding path of the sliding fan 3 is the spring tensioning path, which is the upper preloaded helical torsion spring 114, corresponding to the normal width of the sliding fan.

[0083] Thus, by way of example, a length ratio of 1:20 is obtained between the sliding path assisted by the opening auxiliary device 100 and the total sliding path or sliding fan width of the sliding fan 3.

[0084] This length ratio is transmitted by transmission device 116—which here has three transmission stages with a corresponding sub-transmission ratio of 1:2.7—to drive gear 113 and helical torsion spring 114. This sub-transmission ratio can also be selected in other ways. It depends primarily on the available structural space of the opening auxiliary device 100 and the sliding path of the sliding fan in the closing direction, or the width of the sliding fan, and the thus feasible pitch circle diameter of the gear. Similarly, transmission device 116 with more or fewer than three transmission stages is also feasible. The transmission stages are here realized by three drive shafts 123, 124, and 125. Drive shafts 123, 124, and 125 are each rotatably supported in corresponding housing halves 122a and 122b.

[0085] The clamping gear 126 is fixed in one piece to the clamping gear shaft 127. The clamping gear shaft 127 is rotatably supported in the corresponding housing halves 122a, 122b. The second gear 128 is mounted on the clamping gear shaft 127. In the assembled state of the transmission device 116, the second gear 128 meshes with the third gear 129 located on the first transition shaft 135.

[0086] The clamping gear 126 is on the side facing the second gear 128—here along the... Figure 3aThe negative z-direction of the coordinate system in the figure constitutes the ratchet-type end tooth 130. Correspondingly, the second gear 128 also has a ratchet-type end tooth 131 on its side facing the clamping gear 126. The two ratchet-type end teeth 130, 131, together with the spring 132, constitute the ratchet mechanism 133, the function of which will be further explained below.

[0087] The first transmission stage is formed by a first pinion 134, which is located on a first transition shaft 135 and meshes with a fourth gear 136 located on a first transmission shaft 123 when the transmission device 116 is assembled. The first pinion 134 and the fourth gear 136 can advantageously be connected in one piece to their respective shafts 135, 123, as is the case in... Figure 3a As shown in the image.

[0088] The second transmission stage is formed by a second pinion 137, which is located on the first transmission shaft 123 and meshes with a fifth gear 138 located on the second transmission shaft 124. The second pinion 137 and the fifth gear 138 can advantageously be connected in one piece to their respective transmission shafts 123 and 124, as is the case in… Figure 3a As shown in the image.

[0089] The third transmission stage is formed by a third pinion 139, which is located on the second transmission shaft 124 and meshes with a sixth gear 140 located on the third transmission shaft 125 when the transmission device 116 is assembled. The third pinion 139 and the sixth gear 140 can advantageously be connected in one piece to their respective transmission shafts 124 and 125, as is the case in... Figure 3a As shown in the image.

[0090] A seventh gear 141 is further provided on the third drive shaft 125, which meshes with an eighth gear 142 when the transmission device 116 is assembled. The eighth gear is located on a second transition shaft 143. The second transition shaft 143 is inserted into the first housing half 122a with anti-torsional force. The seventh gear 140 can be advantageously connected to the third drive shaft 125 in a one-piece manner, as is the case in Figure 3a As shown in the diagram, the eighth gear 142 can be rotatably inserted into the second transition shaft 143.

[0091] The eighth gear 142 finally meshes with the first gear 115 when the transmission device 116 is assembled. The first gear, together with the drive gear 113, is located on the gear shaft 112 that drives the first gear.

[0092] The larger the sliding path of the sliding fan 3 in the closing direction or the wider the sliding fan, the greater the torque that can be stored in the helical torsion spring 114, or the smaller the moving force that the operator needs to apply during the closing movement of the sliding fan 3.

[0093] The gear and pinion tooth geometry of the transmission device 116 is derived based on the gear shaft spacing, transmission ratio, and maximum feasible size.

[0094] In addition to the required torque, the helical torsion spring 114 also requires a torsion angle—for example, 287°—so that—for the aforementioned ratio—it can be used as a torque accumulator. The torsion angle of the helical torsion spring 114 is derived from the pitch circle diameter of the drive gear 113 and the sliding path along the opening direction of the sliding fan 3 assisted by the opening auxiliary device 100.

[0095] A helical torsion spring 114 is mounted on the drive gear shaft 112. The first arm of the helical torsion spring 114 is inserted into the drive gear 113, and the second arm of the helical torsion spring 114 is fixed to the housing half 122a. The drive gear 113 is driven by the pre-tensioned helical torsion spring 114 through the release of the helical torsion spring 114 and subsequently by a first toothed rod 118 fixed in the frame 2 for the sliding fan 3 to advance in the opening direction.

[0096] When closed, clamping gear 126 is used to preload the helical torsion spring 114. Clamping gear 126 here engages with the second rack 144 (see, for example, see...). Figure 2b The second rack is fixed to the frame 2 in the extension of the first rack 118. The 1:20 transmission ratio of the transmission device requires only a small additional moving force of a maximum of 3.5 Newtons. The clamping gear 126 is connected via a ratchet mechanism 133 (see...). Figure 2b The clamping gear 126 is engaged with the transmission device 116 during the closing process of the sliding fan 3. When the sliding fan 3 is open, the clamping gear 126 is decoupled from the transmission device 116.

[0097] Without this decoupling when the sliding fan 3 is open, the drive gear 113 and the clamping gear 126 will simultaneously engage with the transmission device 116. Due to the transmission ratio of the transmission device, it is impossible for both the drive gear 113 and the clamping gear 126 to rotate at the same speed, and the transmission device 116 will become blocked.

[0098] The protection of the helical torsion spring 114 from excessive preload angle is achieved by the ratchet mechanism 133, which acts on the clamping gear 126, being equipped with ratchet-type end teeth 130, 131 (see...). Figure 3a The ratchet teeth thus implemented—which, during the closing process, exert a moving force on the sliding fan 3 and subsequently transmit torque from the clamping gear 126 to the transmission 116—have a steep tooth angle (Flankenwinkel).

[0099] If the helical torsion spring 114 is fully preloaded, an increased torque is generated in the transmission 116, so that the force of the spring 132 is no longer sufficient to press the tooth flanks of the end teeth 130, 131 against each other. Accordingly, the tooth flanks of the end teeth 130, 131 slide away from each other, thereby releasing the form-locking between the end teeth 130, 131, and causing the ratchet mechanism 133 to "slip". As a result, the clamping gear 126 is decoupled from the transmission 116, and the helical torsion spring 114 is protected from possible damage.

[0100] After the sliding fan 3 is opened by 100 mm, the drive gear 113 engages with the second, downward-oriented section 145 of the first rack 118 (see, for example, the following). Figure 4a As a result, the drive gear shaft 112 is pressed downward, slides past the corresponding locking hooks 111a and 111b, and locks under the corresponding locking hooks 111a and 111b and remains in that position. As a result, the drive gear 113 is decoupled from the first rack 118.

[0101] If the sliding fan 3 is lowered in the open position—so as to ventilate the space—and then immediately raised again, the opening assist device 100 is not activated. This is achieved by the rocker arm 103 being elastically deformable. If the sliding fan 3 is not laterally embedded in the frame 2, the rocker arm 103 elastically deforms and thus laterally deflects when the locking lever 102 is operated by the handle, because there is no support for the rocker arm 103 (in the form of a release pin 105) in such an intermediate position of the sliding fan 3. Thus, the opening assist device 100 is not operated.

[0102] If the sliding fan 3 is closed and unlocked by the locking lever 102 via the operation of the handle, then the rocker arm 103 pushes the spring-loaded slider 106 in the opening direction, thus activating the opening assistance device 100. The torque of the helical torsion spring 114 is limited such that it cannot push the sliding fan 3 open independently. Only the moving force applied to the sliding fan 3 by the operator in the opening direction of the sliding fan 3 is assisted by the helical torsion spring 114. The operator must then apply a maximum moving force of 25 Newtons to accelerate the sliding fan 3 to a constant speed.

[0103] To accommodate different masses of the sliding fan 3 with the opening auxiliary device 100, different helical torsion springs 114 can be provided, or the springs can be adjustable in their characteristics. In particular, the adjustability of the spring can be achieved by appropriately selecting the preload, thus enabling compatibility with different sliding fans 3. The spring can also be designed for dual-function operation, so that the opening auxiliary device 100 can also be used as a closing auxiliary device 100a.

[0104] One, more, or all of the gears and pinions of the transmission 116, as well as the first rack 118, may be made of plastic material. The plastic material is selected based on the surface pressure acting during the rolling motion of the gear pair. In order to advantageously meet the structural space requirements of the transmission 116, the gears and pinions may be particularly preferably made of a mixture of polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS).

[0105] Therefore, toxicologically hazardous materials are not used in the opening aid 100 described herein. Furthermore, the opening aid 100 can be easily disassembled into its individual components at the end of its service life, as the components are connected only by threaded or plug-in connections rather than adhesives. This assembly scheme facilitates the recycling of pure materials.

[0106] exist Figure 3b The diagram shows the force and path relationship on the sliding fan 3 with and without the opening assist device 100.

[0107] The solid line diagram illustrates the opening motion of the sliding fan 3 and the closing process of the sliding fan 3 without the auxiliary device 100 being turned on.

[0108] In the exemplary test, the average opening force applied by the operator at its maximum was measured to be approximately 75 Newtons. This allows the sliding fan 3 to move from the closed position into a uniform opening motion. Opening force The peak value was measured at 97 Newtons. To allow the operator to continue moving the sliding fan 3 to the open position at a constant speed, an average force of 23 Newtons was measured.

[0109] The maximum closing force FFs applied by the operator was measured at an average of 62 Newtons to allow the sliding fan 3 to enter a uniform closing motion from the open position. To allow the operator to continue moving the sliding fan 3 to the closed position within the range of further closing motion during this uniform motion, an average force of 23 Newtons was measured.

[0110] exist Figure 3b The dashed line diagram in the figure depicts the opening movement and closing movement of the sliding fan 3 in the case of having the opening auxiliary device 100.

[0111] According to DIN EN 12217, the operating force should be reduced when opening is performed with the aid of the opening auxiliary device 100. It drops to the maximum value of 25 Newtons in the standard type 3. If we consider the peak value of the opening force measurement of 97 Newtons, then this corresponds to the operating force. How much is it reduced by 72 Newtons?

[0112] During the closing process—that is, when the sliding fan 3 moves into the side frame 2—the operating force is allowed to increase to a maximum of 75 Newtons according to standards. The force required for the operator to continue moving the sliding fan 3 to the open position in a constant-speed motion is an average of 23 Newtons and is therefore equal to the force. This force must be applied to continue moving the sliding fan 3 from the closed position to the open position in uniform motion.

[0113] Another advantageous objective in the design of the opening assist device 100 is that by applying the opening assist, the force FFsU required for the operator to continue moving the sliding fan 3 to the closed position in a constant motion—where the preloaded helical torsion spring 114 is tightened—does not increase significantly by more than 23 Newtons.

[0114] Therefore, the opening assist device 100 is advantageously designed in such a way that the operating force required to open the sliding fan 3 by utilizing the opening assist device 100 is reduced. It is always greater than the increase in operating force (ΔFFs) used to continue moving the sliding fan 3 to its closed position by utilizing the opening auxiliary device 100 compared to the state without opening the auxiliary device 100.

[0115] Furthermore, it is advantageously configured that opening the auxiliary device 100 only operates within a sliding path of approximately 100 millimeters. This is to significantly reduce the operating force of the sliding fan 3 on this section of the road. This is advantageous because along the sliding path... Without activating the auxiliary device 100, the maximum operating force should be applied to accelerate the sliding fan 3 out of the sealing plane of the frame 2 and thus overcome the static friction between the seal and the sliding fan 3 as well as the inertia that hinders the movement of the sliding fan 3.

[0116] The total sliding path sF of sliding fan 3 is therefore the sliding path Many times more. Therefore, sF is preferably... 8 to 30 times larger and particularly preferably It is 15 to 25 times larger. This is therefore advantageous because such a sufficiently large path can be used to preload the helical torsion spring 114.

[0117] according to Figures 4a to 4e The function of the opening auxiliary device 100 will now be explained. The opening auxiliary device 100 includes—in particular—a clamping gear 126, a transmission device 116 with three transmission stages, a helical torsion spring 114 as a torque accumulator, a drive gear 113, and a first rack 118 disposed in the frame 2 (see Figure 4a ).

[0118] By rotating the handle to operate the operating mechanism 101 while the lifting sliding door 1 is open, the drive gear 113 is decoupled from the transmission device 116, thereby allowing the gear of the transmission device 116 to rotate freely (see...). Figure 4b The torque of the helical torsion spring 114 is transmitted to the drive gear 113 via a mechanical connection between the helical torsion spring 114 and the drive gear 113. The torque of the helical torsion spring 114 is designed such that the automatic opening of the sliding door 3 is prevented without additional moving force applied by a person. The opening assist device 100 only assists the opening process of the sliding door 3 when an additional force for opening the lifting sliding door 1 is applied by an operator (see [link]). Figure 4c ).

[0119] After the sliding fan 3 has opened to a width of approximately 100 mm, the drive gear 113 disengages from the first rack 118, thus the drive gear 113 is no longer engaged with the first rack 118 (see...). Figure 4d ).

[0120] During the further opening of the sliding fan 3, the clamping gear 126 engages with the second rack 144 (see...). Figure 4e However, the transmission device 116 is decoupled from the clamping gear 126 via the ratchet mechanism 133, so that the gears of the transmission device 116 do not rotate together.

[0121] Only when the sliding fan 3 is closed will the clamping gear 126 drive the transmission device 116 again, thereby pre-tensioning the helical torsion spring 114 for the next opening process. In order to prevent the helical torsion spring 114 from being over-tightened, a ratchet mechanism 133 is provided on the clamping gear 126, which protects the helical torsion spring 114 from being pre-tightened beyond the set torsion angle or the set torque.

[0122] With the sliding door 3 open, the movement force to be applied by the operator is effectively reduced to a maximum value of 25 Newtons by the relaxation of the tensioned helical torsion spring 114—which outputs its stored torque to the drive gear 113 when the sliding door 3 is open—so that the sliding door or lift-up sliding door 1 reliably meets the requirements for barrier-free buildings.

[0123] When the sliding fan 3 is closed, the selected transmission ratio ensures that only slightly higher moving force can be applied compared to when it is open, because the transmission 116 advantageously and decisively reduces the moving force of the sliding fan 3 to be applied by the operator for pre-tightening the helical torsion spring 114.

[0124] The opening assist device 100 is advantageously designed such that the generated force and torque act within the opening assist device 100, so that no force or torque acts on the fan frame 5 or / or the frame 2 when the sliding fan 3 is locked.

[0125] List of reference numerals

[0126] 1. Sliding door

[0127] 2 frames

[0128] 3 Sliding Fan

[0129] 4. Fixed glass

[0130] 5-sector frame

[0131] 6 planar elements

[0132] 7 profiles

[0133] 8-sector frame crossbeam

[0134] 100 Open the assistant

[0135] 101 Operating Mechanism

[0136] 102 Locking lever

[0137] 103 Joystick

[0138] 104 guide groove

[0139] 105 Release pin

[0140] 106 Slider

[0141] 107 Mushroom-shaped head

[0142] 108 pawls

[0143] 109a and 109b arms

[0144] 110a, 110b notches

[0145] 111a, 111b locking hooks

[0146] 112 Drive gear shaft

[0147] 113 Drive gear

[0148] 114 Helical Torsion Spring

[0149] 115 First Gear

[0150] 116 Transmission device

[0151] 117a, 117b guides

[0152] 118 rack

[0153] 119a and 119b leaf springs

[0154] 120 First Swingable Section

[0155] 121 Hinge connection

[0156] 122a, 122b shell halves

[0157] 123 Drive shaft

[0158] 124 Drive shaft

[0159] 125 drive shaft

[0160] 126 Clamping gear

[0161] 127 Clamping gear shaft

[0162] 128 Second Gear

[0163] 129 Third Gear

[0164] 130 End teeth

[0165] 131 End teeth

[0166] 132 Spring

[0167] 133 Ratchet Mechanism

[0168] 134 First pinion

[0169] 135 First Transition Shaft

[0170] 136 Fourth Gear

[0171] 137 Second pinion

[0172] 138 The Fifth Gear

[0173] 139 Third pinion

[0174] 140 The Sixth Gear

[0175] 141 The Seventh Gear

[0176] 142 The Eighth Gear

[0177] 143 Second Transition Shaft

[0178] 144 Second rack

[0179] 145 Second Section

Claims

1. A sliding door, which can be installed vertically into a building opening, the sliding door having at least the following features: a. A frame (2) that can be fixedly installed on a building, wherein at least one sliding sash (3) is guided in the frame in such a way that it can slide on the total sliding path (sF); b. Among them, The at least one sliding fan (3) has a fan frame (5), and a planar element (6) is inserted into the fan frame; c. Used in the auxiliary sliding path along the opening direction. An opening assist device (100) for assisting in opening at least one sliding fan (3); and d. wherein the opening assist device (100) has a spring (114) as a force and / or torque accumulator; e. The opening assist device (100) is designed to preload the spring on the spring tension path during the closing of the sliding fan (3); Its features are, f. The total sliding path (sF) of the sliding fan (3) along the opening direction is the auxiliary sliding path of the sliding fan (3). The sliding fan is assisted by the opening assist device (100) on the auxiliary sliding path, which is many times larger than the sliding fan itself. g. The opening assist device (100) is designed to reduce the operating force required to open the sliding fan (3) using the opening assist device (100) on the assist sliding path. The increase in operating force is always greater than the increase when the sliding fan (3) is pushed back on the spring tension path.

2. The sliding door according to claim 1, particularly the lift-type sliding door (1), is characterized in that, The opening assist device (100) is designed to assist the sliding fan (3) in accelerating from its stationary state in its closed position and in the sliding fan (3) along the assist sliding path. Further movement or further opening process.

3. The sliding door according to any one of the preceding claims, particularly the lift-type sliding door (1), is characterized in that, The total sliding path (sF) of the sliding fan (3) is preferably 8 to 30 times larger than the auxiliary sliding path.

4. The sliding door according to any one of the preceding claims, particularly the lift-type sliding door (1), is characterized in that, The opening auxiliary device (100) is partially or completely inserted into the profile (7) of the upper horizontal fan frame beam (8) of the fan frame (5).

5. The sliding door according to any one of the preceding claims, particularly the lift-type sliding door (1), is characterized in that, The opening assistance device (100) has an operating mechanism (101) and a transmission device (116).

6. The sliding door according to any one of the preceding claims, characterized in that, The spring is a helical torsion spring (114).

7. The sliding door according to any one of the preceding claims, characterized in that, The magnitude of the force or torque applied by the helical torsion spring (114) is set such that the force or torque cannot push the sliding fan (3) open on its own.

8. The sliding door according to claim 6 or 7, characterized in that, The pre-tensioned helical torsion spring (114) drives the drive gear (113) by releasing it. This drive gear is operatively connected to the first rack (118) fixed in the frame (2) and thus assists in the opening movement of the sliding fan (3).

9. The sliding door according to any one of claims 6 to 8, characterized in that, The clamping gear (126) engages with the second rack (144) during the pre-tensioning of the helical torsion spring. The second rack is fixed to the frame (2) in the extension of the first rack (118).

10. The sliding door according to any one of the preceding claims, characterized in that, The transmission device (116) is preferably implemented in multiple stages, and more preferably in three stages.

11. The sliding door according to claim 9 or 10, characterized in that, The transmission device (116) is operatively connected to the clamping gear (126) during the closing of the sliding fan (3).

12. The sliding door according to any one of claims 9 to 11, characterized in that, When the sliding fan (3) is open, the clamping gear (126) is decoupled from the transmission device (116).

13. The sliding door according to claim 12, characterized in that, The clamping gear (126) acts on the transmission device (116) through a spring-loaded ratchet mechanism (133).

14. The sliding door according to any one of the preceding claims, characterized in that, The opening assistance device (100) has a housing.

15. The sliding door according to any one of claims 5 to 14, characterized in that, The operating mechanism (101) is designed such that the opening assist device (100) can only be activated when the sliding fan (3) is locked or locked by the handle and when it is unlocked from the locked state by the handle.

16. The sliding door according to any one of the preceding claims, characterized in that, The operating mechanism (101) of the opening auxiliary device (100) has a rocker arm (103) that transmits the movement of the vertically movable locking lever (102) to the rocker arm (103).

17. The sliding door according to claim 16, characterized in that, The rocker arm (103) has a preferably triangular guide groove (104) in the region at the upper free end, the guide groove (104) being preferably molded onto the rocker arm (103) in one piece.

18. The sliding door according to claim 16 or 17, characterized in that, The support for the rocker arm (103) is provided with a release pin (105) fixed on the frame (2).

19. The sliding door according to claim 17 or 18, characterized in that, The guide groove (104) works in conjunction with the spring-loaded slider (106), and the slider (106) acts on the pawl (108).

20. The sliding door according to claim 17 or 18, characterized in that, In the locked position of the sliding fan (3), the guide groove (104) is above the release pin (105) and the slider (106).

21. The sliding door according to claim 20, characterized in that, The pawl (108) has a first arm and a second arm (109a, 109b), each with a notch (110a, 110b) machined into the arm (109a, 109b), and each with a locking hook (111a, 111b) extending into the corresponding notch (110a, 110b).

22. The sliding door according to any one of the preceding claims, characterized in that, A drive gear (113) is provided on the drive gear shaft (112), together with the helical torsion spring (114) and the first gear (115) of the transmission device (116).

23. The sliding door according to claim 22, characterized in that, The drive gear shafts (112) are each rotatably and highly movable in the guides (117a, 117b) in the respective housing halves (122a, 122b) of the housing.

24. The sliding door according to any one of claims 21 to 23, characterized in that, In the locked and closed positions of the sliding fan (3), the drive gear shaft (112) is held in the lower position in the corresponding recess (110a, 110b) by the corresponding locking hooks (111a, 111b) and the drive gear (113) is operatively connected to the first gear (115) and the transmission device (116) and simultaneously decoupled from the first rack (118).

25. The sliding door according to any one of claims 16 to 24, characterized in that, By operating the handle of the sliding fan (3), the locking lever (102) moves downward, thereby causing the guide groove (104) of the rocker arm (103) to slide to the head (107) of the slider (106). The slider (106) moves in the opening direction of the sliding fan, thereby causing the pawl (108) and its corresponding locking hooks (111a, 111b) to move in the opening direction of the sliding fan (3). The corresponding locking hooks (111a, 111b) thereby release the drive gear shaft (112), causing the drive gear shaft (112) to move vertically upward.

26. The sliding door according to claim 25, characterized in that, The upward vertical movement of the drive gear shaft (112) is assisted by one or more, particularly two springs (119a, 119b).

27. The sliding door according to any one of claims 8 to 26, characterized in that, Through vertical movement, the drive gear shaft (112), together with the helical torsion spring (114) and the drive gear (115), decouples from the transmission device (116) and achieves kinetic connection with the first rack (118), which is fixed on the frame (2).

28. The sliding door according to any one of claims 5 to 27, characterized in that, The rack (118) has a hinge connection (121) through which a first swingable section (120) of the rack (118) is guided obliquely downward, thereby allowing the teeth of the drive gear (115) to engage with the teeth of the first swingable section (120) of the rack (118) after the drive gear (115) is no longer operatively connected to the transmission device (116).

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