Limiting device for overhead track and overhead track door

Abstract

The utility model provides a kind of for limit device and hang the limit device of track door, including pedestal, first tensioner, second tensioner, adjusting gear and top cover.The middle part of pedestal forms gear ring part;Adjusting gear includes tooth profile part;The middle part inboard of first tensioner and second tensioner is formed with rack portion extending along first direction, and first tensioner and second tensioner are respectively movably arranged in the two sides of adjusting gear in second direction;Adjusting gear is in unlocked state, and tooth profile part is separated from gear ring part, so that adjusting gear can be driven rack respectively to move to outside by the rotation of specific direction, and make first tensioner and second tensioner respectively be tensioned in two sides in track;Adjusting gear is in locked state, and tooth profile part is engaged with gear ring part.The present application breaks through the installation limit of existing embedded stop piece, can be freely adjusted position when in unlocked state, realizes tensioning fixation by gear rack drive, and firm stability can be guaranteed by gear ring engagement in locked state.

Description

Technical Field

[0001] This invention relates to the field of furniture hardware technology, and in particular to a limiting device for hanging rails and a sliding door. Background Technology

[0002] As a door structure widely used in building interior spaces, the smoothness and buffering effect of the opening and closing process of sliding doors mainly rely on the damping trigger stop installed in the hanging rail. This stop adjusts the buffer stroke by moving within the rail, thereby achieving deceleration and buffering when the door closes, improving the user experience and safety.

[0003] In existing technologies, to accommodate the movement and installation requirements of damping trigger stops, the interior of the hanging rail is typically designed with a T-slot structure. The damping trigger stop needs to be embedded into the rail along the extension direction of the T-slot and must form a stable fit with the rail to ensure the accuracy of the buffer stroke. Due to the design characteristics of this T-slot structure, the installation method of the damping trigger stop has inherent technical limitations: because the opening size of the T-slot is smaller than the size of the internal accommodating space, the stop cannot be inserted laterally from the outside of the already installed rail. It can only be installed by pre-embedding the trigger stop into the T-slot of the rail before the rail is installed to the building's doorway, and then the entire rail is fixedly installed. This is the "pre-embedded installation" process commonly used in the industry.

[0004] However, this pre-embedded installation process has revealed many problems in actual construction and application: First, the installation sequence is strictly limited. If the construction workers neglect to pre-embed the damping trigger stop during construction, and the problem is only discovered after the track and door are fully installed, the installed door must be disassembled, and then the fixed hanging track must be removed. If special structures such as pocket doorways (i.e., doorways where one end of the track is fixedly connected to the wall and there is no side opening), it may even be necessary to remove part of the wall to embed the stop into the track and reinstall it, which not only significantly increases construction costs but also wastes human and material resources. Second, the error tolerance of pre-embedded installation is extremely low. Any negligence in any construction link will lead to rework, seriously affecting construction efficiency and extending the construction period. In addition, for scenarios where the damping trigger stop needs to be replaced or repaired after being put into use for a period of time, it is also necessary to go through the complex process of dismantling the door, track, and even wall, which is costly and cumbersome, causing great inconvenience to users.

[0005] In summary, the existing damping trigger stops for sliding door rails suffer from technical defects such as poor installation flexibility, low fault tolerance, high rework and maintenance costs, and low construction efficiency due to the limitations of the T-slot structure and pre-embedded installation process. These defects fail to meet the convenience requirements of actual construction and use. There is an urgent need for a technical solution that can overcome the limitations of the existing structure and achieve convenient installation and maintenance to solve the problems existing in the above-mentioned technologies. Summary of the Invention

[0006] In view of this, embodiments of the present invention provide a limiting device for a hanging rail and a hanging sliding door to eliminate or improve one or more defects existing in the prior art.

[0007] One aspect of the present invention provides a limiting device for a hanging rail, the limiting device comprising: a base, a first tensioning member, a second tensioning member, an adjusting gear, and a top cover, the top cover being fixedly disposed on the top of the base, a receiving cavity being formed between the top cover and the base, and the first tensioning member, the second tensioning member, and the adjusting gear being installed in the receiving cavity. The base has a gear seat in the middle for mounting the adjusting gear, the gear seat including a gear ring portion; the adjusting gear includes a toothed portion and an operating portion. The first tensioner and the second tensioner each have a rack portion extending in a first direction formed on the inner side of their middle portions. The first tensioner and the second tensioner are respectively movably disposed on both sides of the adjusting gear in a second direction. The movable direction of the first tensioner and the second tensioner is the second direction. The first direction is the length direction of the base, and the second direction is the width direction of the base. The height of the receiving cavity at the gear seat is configured to be greater than the thickness of the tooth profile of the adjusting gear, so that the adjusting gear can move along its axial direction under the control of the operating unit to enter the unlocked state. When the adjusting gear is in the unlocked state, the toothed portion disengages from the gear ring portion, so that the adjusting gear can drive the rack portions of the first tensioner and the second tensioner to move outward respectively through rotation in a specific direction, and cause the first tensioner and the second tensioner to be tensioned in the hanging rail on both sides of the limiting device in the second direction respectively. When the adjusting gear is locked, the toothed portion engages with the gear ring portion.

[0008] In some embodiments, the limiting device further includes an elastic element disposed within the receiving cavity, with its two ends abutting against the adjusting gear and the inner wall of the top cover, respectively, to provide a thrust to the adjusting gear to automatically restore the locked state.

[0009] In some embodiments, the gear seat is a countersunk hole structure, the countersunk hole includes a coaxial through hole and a blind hole, and the gear ring portion is formed at the outer periphery of the blind hole.

[0010] In some embodiments, the base has a thickened boss formed on the outer side of the gear seat; and / or, The inner wall surface of the top cover has guide posts formed at the locations corresponding to the elastic element; and / or, The adjusting gear has a guide hole at the end facing the top cover.

[0011] In some embodiments, the base forms limiting posts on both sides of the gear seat along the second direction, and the inner surface of the limiting posts in the second direction is an arc-shaped surface.

[0012] In some embodiments, the limiting device further includes a limiting groove and a limiting protrusion for limiting the movable range of the first tensioner and the second tensioner; In the first direction, one of the limiting groove and the limiting protrusion is formed on both sides of the receiving cavity, and the other is formed on both sides of the first tensioner and the second tensioner.

[0013] In some embodiments, the first tensioner and / or the second tensioner are rigid or elastic.

[0014] In some embodiments, the first tensioner and the second tensioner are centrally symmetrical structures.

[0015] In some embodiments, the first tensioner and the second tensioner further include: an end guide structure and a middle guide structure; The end guide structure includes: an outer end guide strip located at the end of one tensioner, and an inner end guide strip located near the end of another tensioner; in a first direction, the outer end guide strip and the inner end guide strip are located on both sides of the same tensioner; the outer end guide strip of one tensioner and the inner end guide strip of the other tensioner are closely attached to each other. The central guide structure includes: a rack portion located in the middle of one tensioner, and a central guide strip located in the middle of another tensioner; in a first direction, the rack portion of one tensioner and the central guide strip of the other tensioner are closely fitted together.

[0016] Another aspect of the present invention provides a sliding door, including the aforementioned limiting device for the hanging rail, wherein a damper triggering structure is formed at the bottom of the base.

[0017] This invention breaks through the installation limitations of existing pre-embedded stops by using the working principle of "axial movement unlocking - rotational drive tensioning - axial fall locking". In the unlocked state, the position can be freely adjusted, and tensioning and fixing are achieved through gear and rack transmission. In the locked state, the engagement of the gear ring can ensure firm stability. Installation and fixing can be completed without disassembling the rail.

[0018] Additional advantages, objects, and features of the invention will be set forth in part in the description which follows, and will also become apparent in part to those skilled in the art upon studying the description, or may be learned by practice of the invention. The objects and other advantages of the invention can be realized and obtained by means of the structures specifically pointed out in the description and drawings.

[0019] Those skilled in the art will understand that the objectives and advantages achievable with the present invention are not limited to those specifically described above, and that the above and other objectives achievable with the present invention will become clearer from the following detailed description. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, are not intended to limit the scope of the invention. The components in the drawings are not drawn to scale but are merely illustrative of the principles of the invention. For ease of illustration and description of certain parts of the invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the invention.

[0021] Figure 1 This is a schematic diagram of a sliding door structure according to an embodiment of the present invention. In order to illustrate the limiting device, damper assembly, and roller assembly inside the hanging rail, a portion of the hanging cabinet is cut in half.

[0022] Figure 2 for Figure 1 Enlarged view of part I (the two tensioning members in the figure do not extend to the sides and are not locked in the hanging rail).

[0023] Figure 3 This is a schematic diagram of the limiting device in the unlocked state according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the limiting device in the locked state according to an embodiment of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the limiting device in one embodiment of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the limiting device after removing the top cover in one embodiment of the present invention.

[0027] Figure 7 This is an exploded view of a limiting device according to an embodiment of the present invention.

[0028] Figure 8 This is a top view of a limiting device according to an embodiment of the present invention.

[0029] Figure 9 for Figure 8 In the sectional view of plane AA, the adjusting gear is in the locked position.

[0030] Figure 10 for Figure 8 In the sectional view of plane AA, the adjusting gear is in the unlocked state.

[0031] Figure 11 for Figure 8 Sectional view on plane BB.

[0032] Figure label: 1. Base; 110. Gear seat; 111. Through hole; 112. Blind hole; 113. Gear ring part; 114. Thickened boss; 120. Limiting post; 130. Limiting groove; 141. First connecting hole; 142. Second connecting hole; 150. Damper triggering structure; 2a. First tensioning element; 2b. Second tensioning element; 210. Rack portion; 220. Outer end guide bar; 230. Inner end guide bar; 240. Middle guide bar; 250. Limiting protrusion; 3. Adjusting gear; 310. Tooth profile; 320. Operating part; 330. Guide hole; 4. Top cover; 410. Guide post; 5. Elastic element; 6a. First connector; 6b. Second connector; 7. Hanging rail; 8. Damper assembly; 9. Roller assembly; 10. Gantry. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0034] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0035] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0036] It should also be noted that, unless otherwise specified, the term "connection" in this article can refer not only to a direct connection, but also to an indirect connection involving an intermediary.

[0037] In the following description, embodiments of the invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar parts, or the same or similar steps.

[0038] One aspect of the present invention provides a limiting device for a hanging rail, such as... Figures 5-7 As shown, the limiting device may include: a base 1, a first tensioning member 2a, a second tensioning member 2b, an adjusting gear 3, and a top cover 4. The top cover 4 is fixedly disposed on the top of the base 1, and a receiving cavity is formed between the top cover 4 and the base 1. The first tensioning member 2a, the second tensioning member 2b, and the adjusting gear 3 are all installed in the receiving cavity.

[0039] The cavity described herein can be formed by the recessed structure of the base 1, the recessed structure of the top cover 4, or a combination of both.

[0040] The base 1 can be designed as a cuboid or near-cuboid structure, with dimensions adapted to the internal space of the hanging rail 7. Its length direction (first direction) is consistent with the extension direction of the hanging rail 7, and its width direction (second direction) matches the distance between the inner sidewalls of the hanging rail 7, ensuring that the device can be smoothly placed into the hanging rail 7 without excessive shaking. The base 1 is the base of the entire limiting device and undertakes multiple functions: first, it provides installation support and motion guidance for the first tensioning member 2a, the second tensioning member 2b, the adjusting gear 3, etc., ensuring that each component moves according to the preset trajectory; second, it forms a closed receiving cavity by cooperating with the top cover 4, protecting the internal transmission components from dust and impurities; and third, it realizes the locking function of the device by cooperating with the adjusting gear 3 through the gear seat 110, ensuring the stability of the fixation.

[0041] Specifically, a gear seat 110 for mounting the adjusting gear 3 is formed in the middle of the base 1. The gear seat 110 includes a gear ring portion 113. The gear seat 110 can be designed as a raised or recessed structure. The core functional part is the gear ring portion 113, which is annular. The inner ring has evenly distributed teeth. The tooth specifications are completely matched with the tooth profile 310 of the adjusting gear 3. It can mesh with the adjusting gear 3 when it falls back, forming a circumferential limit and restricting the rotation of the adjusting gear 3.

[0042] In this invention, the adjusting gear 3 can be integrally formed or fixedly connected by two parts: the toothed part 310 and the operating part 320. The whole can have a T-structure, and the axial direction is consistent with the height direction of the base 1. The adjusting gear 3 is the control core of the whole device, and its main functions include: first, switching between the unlocking and locking states of the device through axial movement (along its own axis); second, driving the first and second tensioning members 2b to move through rotational motion to complete the tensioning or retraction action; and third, forming a locking state through the meshing of the toothed part 310 and the gear ring part 113 of the base 1 to prevent accidental loosening.

[0043] Specifically, the toothed portion 310 is located on the upper part of the adjusting gear 3, and is cylindrical in shape. Its outer wall is provided with evenly distributed teeth, the tooth specifications of which match both the teeth of the base 1 gear ring portion 113 and the teeth of the tensioner rack portion 210. In the unlocked state, the toothed portion 310 is separated from the gear ring portion 113 and only engages with the tensioner rack portion 210, driving the tensioner to move through rotation. In the locked state, the toothed portion 310 engages with the gear ring portion 113, restricting its own rotation and thus locking the position of the tensioner.

[0044] The operating part 320 can be located below the adjusting gear 3, extending to the through hole 111 or operating hole of the base 1, facilitating lifting, rotation, and other operations by construction personnel using tools. The surface of the operating part 320 can be designed with anti-slip textures (such as internal hexagonal grooves, slotted grooves, cross grooves, knurling, etc.) to improve grip during operation and prevent slippage; its length must meet the requirement that "the toothed part 310 can be completely disengaged from the gear ring part 113 during lifting" to ensure complete unlocking.

[0045] In this invention, the first tensioning member 2a and the second tensioning member 2b are symmetrically designed execution units. By moving outward in the width direction (second direction) of the base 1, they fit tightly against the inner sidewalls on both sides of the hanging rail 7, generating tension force to fix the entire limiting device inside the hanging rail 7. Conversely, when retracting inward, the fixation to the hanging rail 7 can be released, realizing the adjustment or disassembly of the device position.

[0046] Specifically, the inner sides of the middle portion of the first tensioner 2a and the second tensioner 2b are each formed with a rack portion 210 extending in the first direction. The first tensioner 2a and the second tensioner 2b are respectively movably disposed on both sides of the adjusting gear 3 in the second direction. The movable direction of the first tensioner 2a and the second tensioner 2b is the second direction. The first direction is the length direction of the base 1, and the second direction is the width direction of the base 1.

[0047] Optionally, both the first tensioning member 2a and the second tensioning member 2b are elongated structures with a length that matches the length direction (first direction) of the base 1, and an initial dimension in the width direction (second direction) that is slightly smaller than the width of the base 1, reserving space for outward extension and assembly. The outer wall (the side facing the inner wall of the hanging rail 7) can be designed as a flat or slightly rough anti-slip surface to increase the friction with the inner wall of the hanging rail 7, improve the stability of the tensioning and fixing, and prevent the device from shifting during the vibration of the door.

[0048] The rack portion 210 is located on the inner side of the middle part of the tensioner (towards the adjusting gear 3) and extends along the length direction (first direction) of the base 1. The tooth specifications of the rack portion 210 are perfectly matched with the tooth profile 310 of the adjusting gear 3, forming a meshing transmission relationship. When the adjusting gear 3 rotates, the tooth profile 310, through meshing with the teeth of the rack portion 210, converts the rotational motion into linear motion of the tensioner, driving the tensioner to move outward or inward.

[0049] Furthermore, the bottom or side of the tensioning member is provided with a groove or protrusion that is adapted to the guide structure of the base 1, forming a sliding fit with the guide groove / protrusion of the base 1, ensuring that the tensioning member can only move in the second direction and does not shift or deflect laterally, ensuring that the tensioning members on both sides extend synchronously and symmetrically, and avoiding uneven force on one side that causes the device to tilt.

[0050] In this invention, the top cover 4 is a protective cover and structural enclosure for the device. Its main functions include: first, cooperating with the base 1 to form a closed receiving cavity, enclosing the first tensioning member 2a, the second tensioning member 2b, and the adjusting gear 3, preventing dust, wood chips, oil stains, and other impurities from entering the transmission structure, avoiding tooth wear and transmission jamming, and extending the service life of the device; second, limiting the axial movement of the adjusting gear 3, preventing the adjusting gear 3 from being excessively lifted and detached from the base 1; and third, connecting to the base 1 through a fixing structure (such as screws, buckles, etc.) to ensure the structural integrity of the entire device and prevent parts from falling off during movement.

[0051] In this invention, the height of the receiving cavity at the gear seat 110 is configured to be greater than the thickness of the toothed portion 310 of the adjusting gear 3, so that the adjusting gear 3 can move along its axial direction under the control of the operating part 320 to enter the unlocked state; in the unlocked state, the toothed portion 310 of the adjusting gear 3 disengages from the gear ring portion 113, so that the adjusting gear 3 can drive the rack portions 210 of the first tensioning member 2a and the second tensioning member 2b to move outward respectively through rotation in a specific direction, and cause the first tensioning member 2a and the second tensioning member 2b to be tensioned in the hanging rail 7 on both sides of the limiting device in the second direction; in the locked state, the toothed portion 310 meshes with the gear ring portion 113.

[0052] Figure 1 This is a schematic diagram of a sliding door structure according to an embodiment of the present invention. To illustrate the limiting device, damper assembly 8, and roller assembly 9 inside the hanging rail 7, a portion of the hanging cabinet is shown in cross-section. Figure 1 As shown, the sliding door system in this embodiment of the invention mainly includes a hanging rail 7, a limiting device, a damper assembly 8, a roller assembly 9, and a door frame 10. The hanging rail 7 is horizontally fixed to the top of the building, and its interior houses the limiting device, the damper assembly 8, and the roller assembly 9 along its length. The door frame 10 is located directly below the hanging rail 7, serving as the mounting carrier for the door. It is fixedly connected to the roller assembly 9 and can reciprocate along the length of the hanging rail 7 under the rolling action of the roller assembly 9, thus realizing the opening and closing action of the door.

[0053] Furthermore, the damper assembly 8 includes a fixed bracket and a damping body. The fixed bracket is rigidly connected to the roller assembly 9 and moves synchronously with the gantry 10 along with the roller assembly 9. It is used to provide buffer damping force when the gantry 10 approaches the end of its stroke, preventing direct collision between the gantry and the end structure. The limiting device is selectively fixed at a specific position within the hanging rail 7 according to the actual end position requirement of the gantry 10's stroke. It serves as the limit positioning structure for the movement of the gantry 10 and works in conjunction with the damper assembly 8 to achieve smooth start and stop of the gantry. The following is a combination of... Figures 1-4 The working process and working principle of the limiting device in the embodiments of the present invention are described.

[0054] Figure 2 for Figure 1 The enlarged view of part I shows the limiting device in its initial assembly state, not yet fixedly engaged with the hanging rail 7. As shown in the figure, both the first tensioning member 2a and the second tensioning member 2b of the limiting device are in their initial contracted position, not extending into the width direction of the base 1 (i.e., the direction of the inner wall of the hanging rail 7). A gap exists between them and the inner wall of the hanging rail 7, allowing the limiting device to move freely along the length of the hanging rail 7. This facilitates the adjustment of the limiting device's installation position within the hanging rail 7 by construction personnel according to the design requirements at the end of the gantry 10's stroke. In this state, the adjusting gear 3 of the limiting device is in an initial locking tendency (not fully locked). Its toothed portion 310 has not yet formed a stable mesh with the gear ring portion 113 of the gear seat 110 of the base 1, and is held within the receiving cavity only by its own weight or preload, reserving space for subsequent unlocking operations.

[0055] After the construction workers move the limiting device to the target position within the hanging rail 7, they must first switch the limiting device to the unlocked state to drive the tensioning component to achieve tensioning and fixation. The specific process is as follows: Unlocking Operation: By applying a tool to the operating part 320 of the adjusting gear 3, the adjusting gear 3 is lifted upwards along its axial direction (i.e., the height direction of the base 1). Since the height of the limiting device's receiving cavity at the gear seat 110 is greater than the thickness of the toothed portion 310 of the adjusting gear 3, the adjusting gear 3 can move smoothly along its axial direction until its toothed portion 310 completely disengages from the gear ring portion 113 of the base 1 gear seat 110. At this point, the limiting device enters... Figure 10 The unlocked state is shown.

[0056] Tensioning drive: In the unlocked state, the adjusting gear 3 can rotate freely around its own axis. Rotating the operating part 320 of the adjusting gear 3 in a specific direction (such as clockwise) causes the toothed part 310 of the adjusting gear 3 to mesh with the racked parts 210 of the two tensioning members 2a and 2b, which are located on both sides of the width direction of the adjusting gear 3. This meshes with the racked parts 210 of the two tensioning members, causing the first tensioning member 2a and the second tensioning member 2b to move synchronously outward along the width direction of the base 1.

[0057] Tensioning in place judgment: Continuously rotate the adjusting gear 3 until the outer walls of the first tensioning member 2a and the second tensioning member 2b are tightly fitted with the inner walls of both sides of the hanging rail 7, generating sufficient tension force. At this time, the radial position of the limiting device within the hanging rail 7 is initially fixed, and the tensioning adjustment process is completed. The positions of the two tensioning members are as follows: Figure 4 As shown.

[0058] After tension adjustment is completed, the limiting device must be switched to the locked state to ensure its fixed stability within the hanging rail 7 and prevent the tension position from shifting due to vibration or other factors during door operation. Stop rotating the operating part 320 of the adjusting gear 3, pull the operating part 320 downward along the axial direction of the adjusting gear 3, or remove the upward force, allowing the adjusting gear 3 to fall back along the axial direction by its own weight or preload, until its toothed part 310 fully meshes with the gear ring part 113 of the base 1 gear seat 110. At this time, the limiting device enters the locked state. Figure 10 The locked state is shown.

[0059] In the locked state, the toothed portion 310 of the adjusting gear 3 and the gear ring portion 113 form a circumferential limit, restricting the rotational freedom of the adjusting gear 3, thereby preventing the first tensioning member 2a and the second tensioning member 2b from contracting inward due to external force, ensuring that the tensioning member and the inner wall of the hanging rail 7 are always in close contact, and realizing the reliable fixation of the limiting device in the hanging rail 7.

[0060] The limiting device in this embodiment of the invention breaks through the installation limitations of existing pre-embedded stops by working on the principle of "axial movement unlocking - rotational drive tensioning - axial return locking". Its initial state can be freely adjusted, the unlocked state achieves tensioning and fixing through gear and rack transmission, and the locking state ensures stability through gear ring meshing. Installation and fixing can be completed without disassembling the rail. At the same time, if the position of the limiting device needs to be adjusted or maintenance is required in the future, the above process can be repeated, which greatly improves the convenience of installation and maintenance. It works in coordination with the damper assembly 8, roller assembly 9 and gantry 10 to ensure that the limiting device can be accurately positioned when the door moves to the end of its stroke, and the damper assembly 8 can provide buffering at the same time to realize the smooth start and stop of the door.

[0061] This invention completely solves the inherent defects of the existing "pre-embedded installation" of the damping trigger stop of the hanging rail 7. It eliminates the need to pre-embed the stop before installing the hanging rail 7. In scenarios where the hanging rail 7 and the door body are already fully installed, the limiting device can be directly inserted into the rail from the end or opening of the hanging rail 7, and then tightened and fixed by adjusting the gear 3. This design completely avoids the rework problems of traditional solutions, saving not only the manpower and material costs of disassembly and reinstallation, but also avoiding additional repair costs caused by wall damage. Simultaneously, it significantly shortens the construction and maintenance period and significantly improves on-site operation efficiency.

[0062] Compared to the limitations of traditional pre-embedded stops, which are "fixed in position after installation and cannot be adjusted," the limiting device of this invention can move freely along the length of the hanging rail 7 in its initial state (when the first and second tensioners 2b are not extended). Construction personnel can precisely adjust the fixed position of the limiting device within the hanging rail 7 according to the actual design requirements at the end of the door frame 10's stroke, without being limited by the preset position of the hanging rail 7 before installation. Even if the opening and closing stroke needs to be adjusted during door use (such as changes in furniture placement leading to adjustments in the door's opening and closing range), it can be repositioned by unlocking and adjusting gear 3, retracting the tensioners, and then moving it back to its original position, adapting to different usage scenarios and offering far greater flexibility than traditional solutions.

[0063] This invention ensures the stability of the limiting device within the hanging rail 7 through a dual design of "axial movement unlocking / locking of the adjusting gear 3" and "meshing and limiting of the toothed portion 310-gear ring portion 113". In the unlocked state, the adjusting gear 3 can rotate freely to drive the tensioning member to extend; after entering the locked state, the toothed portion 310 of the adjusting gear 3 meshes tightly with the gear ring portion 113 of the gear seat 110 of the base 1, forming a circumferential limit, effectively preventing the adjusting gear 3 from rotating unexpectedly due to factors such as door vibration or external impact, thereby preventing the tensioning member from contracting inward and causing the limiting device to loosen. At the same time, the closed cavity formed by the top cover 4 and the base 1 can protect the core components such as the first tensioning member 2a, the second tensioning member 2b, and the adjusting gear 3, reducing the impact of dust and impurities on the transmission structure and extending the service life of the device.

[0064] The limiting device of this invention may only include a base 1, a first tensioning member 2a, a second tensioning member 2b, an adjusting gear 3, and a top cover 4. Its structure is simple, assembly is easy, and installation can be completed without complex tools or professional skills. The operation process requires only a few simple steps to fix the limiting device; subsequent adjustments or disassembly can be performed by reversing the operation to retract the tensioning members. The entire process does not require damage to the hanging rail 7 or the door structure, making it easy for both professional construction personnel and ordinary users to operate, significantly lowering the barrier to entry.

[0065] This invention employs a transmission structure of adjusting gear 3 and double-sided racks. When adjusting gear 3 rotates, it synchronously drives the first tensioning member 2a and the second tensioning member 2b to extend symmetrically along the width direction (second direction) of the base 1, ensuring uniform tension on both sides and preventing tilting or jamming of the limiting device due to uneven force on one side. Simultaneously, by controlling the rotation angle of adjusting gear 3, the extension length of the tensioning members can be precisely adjusted to accommodate different width specifications of the hanging rails 7 (such as common 40mm, 50mm, and 60mm width hanging rails 7), eliminating the need to design dedicated limiting devices for different hanging rail 7 models, thus improving the versatility and applicability of the solution.

[0066] In some embodiments, such as Figures 7-11 As shown, the limiting device further includes an elastic element 5, which is disposed within the receiving cavity. Its two ends abut against the inner walls of the adjusting gear 3 and the top cover 4, respectively, to provide a thrust that automatically restores the locking state to the adjusting gear 3. If locking is achieved solely by the weight of the adjusting gear 3, insufficient meshing between the toothed portion 310 of the adjusting gear 3 and the gear ring portion 113 of the base 1 may occur, leading to accidental rotation of the adjusting gear 3 and loosening of the tensioning component during subsequent use. By continuously providing axial thrust, the elastic element 5 allows the adjusting gear 3 to automatically push downwards along the axis after the tensioning adjustment is completed by the operator. This ensures precise meshing between the toothed portion 310 and the gear ring portion 113, eliminating the need for additional manual pulling. This automatic reset function simplifies the installation process, ensures reliable locking action each time, and further lowers the operational threshold.

[0067] Vibrations generated during the operation of the door or slight impacts on the hanging rail 7 during daily use may cause a slight axial displacement of the adjusting gear 3 without the elastic element 5, resulting in a gap between the toothed portion 310 and the gear ring portion 113, thus disrupting the locking state. However, the continuous thrust of the elastic element 5 ensures that the toothed portion 310 and the gear ring portion 113 of the adjusting gear 3 remain in a tight fit. Even under external vibration interference, the elastic element 5 can absorb vibration energy through its own deformation, counteracting the axial displacement tendency of the adjusting gear 3 and ensuring that the meshing relationship is not disrupted. Simultaneously, the elastic element 5 can also compensate for the gaps caused by tooth wear during long-term use, extending the service life of the locking structure and ensuring the long-term stable fixation of the limiting device.

[0068] In some embodiments, such as Figure 7 or Figure 9 As shown, the gear seat 110 has a countersunk hole structure, which includes a coaxial through hole 111 and a blind hole 112. The gear ring portion 113 is formed on the outer periphery of the blind hole 112. The diameter of the through hole 111 is slightly larger than the diameter of the operating part 320 of the adjusting gear 3, ensuring that the operating part 320 can smoothly pass through the through hole 111 without affecting the lifting and lowering action of the adjusting gear 3 along the axial direction (i.e., switching between unlocking and locking states). The diameter of the blind hole 112 is adapted to the diameter of the tooth profile 310 of the adjusting gear 3. The tooth profile 310 can be completely embedded in the blind hole 112, and the gear ring portion 113 on the outer periphery of the blind hole 112 can be precisely aligned with the tooth profile 310, ensuring the tooth engagement during meshing. This design meets the unlocking requirements of the axial movement of the adjusting gear 3 and ensures the stability of the circumferential transmission.

[0069] Compared to the raised structure, which requires sufficient space on the top of the base 1 to accommodate the adjusting gear 3, potentially increasing the overall thickness of the device and causing spatial interference with other components within the hanging rail 7, the countersunk hole is a "recessed" structure. The toothed portion 310 of the adjusting gear 3 is embedded into the blind hole 112 inside the base 1, eliminating the need for additional space on the top of the base 1. This effectively reduces the overall height (thickness) of the device, allowing it to accommodate more narrow hanging rails 7 (such as thin hanging rails 7 with smaller internal heights), while avoiding spatial conflicts with other components within the hanging rail 7, thus improving the device's adaptability.

[0070] In some embodiments, such as Figure 9 As shown, the base 1 has a thickened boss 114 formed on the outer side of the gear seat 110. By increasing the thickness of the base 1 on the outer side of the gear seat 110, the thickened boss 114 significantly improves the structural rigidity and load-bearing capacity of this area, effectively dispersing the aforementioned circumferential, radial, and axial forces, avoiding structural deformation caused by local stress concentration, ensuring that the gear seat 110 maintains stable dimensional accuracy over a long period of time, ensuring the meshing reliability of the adjusting gear 3 and the gear ring 113, and the stability of the force transmission of the tensioning member.

[0071] In some embodiments, such as Figure 11 As shown, a guide post 410 is formed on the inner wall of the top cover 4 at the location corresponding to the elastic member 5. The outer diameter of the guide post 410 is adapted to the inner diameter of the elastic member 5 (such as the inner ring diameter of a spring-like elastic member 5). The elastic member 5 can be sleeved on the outside of the guide post 410, or one end of it can abut against the positioning area around the guide post 410, ensuring that the elastic member 5 is always in the preset axial position between the top cover 4 and the adjusting gear 3, avoiding radial offset. In addition, the length design of the guide post 410 can limit the compression stroke of the elastic member 5, preventing the elastic member 5 from being over-compressed and causing deformation failure, while preventing the elastic member 5 from falling out of the installation position during stretching or compression, ensuring that the elastic member 5 always functions stably.

[0072] In some embodiments, such as Figure 5 As shown, a guide hole 330 is formed at one end of the adjusting gear 3 facing the top cover 4. The outer diameter of the guide post 410 is precisely matched with the inner diameter of the guide hole 330, and the guide post 410 can be inserted into the guide hole 330 to form a sliding fit along the axial direction, providing double guidance for the axial movement of the adjusting gear 3.

[0073] In some embodiments, such as Figure 7 As shown, the base 1 forms limiting posts 120 on both sides of the gear seat 110 along the second direction, and the inner surface of the limiting post 120 in the second direction is an arc-shaped surface.

[0074] When the adjusting gear 3 rotates to drive the tensioning member in the unlocked state, or when switching between locked and unlocked states via axial movement, uneven force (such as the reaction force of the tensioning member's rack portion 210 and the axial thrust of the elastic member 5) can easily cause axial position misalignment, leading to a decrease in the meshing accuracy of the toothed portion 310 with the gear ring portion 113 and the rack portion 210, and even causing transmission jamming. The arc-shaped surface inside the limiting post 120 precisely matches the outer circumferential contour of the adjusting gear 3, forming a surrounding limiting structure. The arc-shaped surface maintains a very small fit clearance with the outer circumference of the adjusting gear 3, which neither affects the rotation and axial movement of the adjusting gear 3, nor prevents radial misalignment of the adjusting gear 3 through lateral support, ensuring that the adjusting gear 3 always runs stably around the preset axis. This design fundamentally solves the problem of easy axial misalignment of the adjusting gear 3, ensuring the accuracy of meshing transmission and avoiding faults such as tooth misalignment and accelerated wear caused by axial misalignment.

[0075] In addition, the limiting post 120 can also limit the innermost position of the two tensioning members: when the tensioning member retracts inward to the preset position, its side near the gear seat 110 will abut against the arc-shaped inner side of the limiting post 120, preventing the tensioning member from continuing to move inward and avoiding the rack part 210 from disengaging from the toothed part 310.

[0076] In some embodiments, such as Figure 6 and Figure 7 As shown, the limiting device further includes a limiting groove 130 and a limiting protrusion 250 for limiting the movable range of the first tensioner 2a and the second tensioner 2b; in a first direction, one of the limiting groove 130 and the limiting protrusion 250 is formed on both sides of the receiving cavity, and the other is formed on both sides of the first tensioner 2a and the second tensioner 2b.

[0077] In this embodiment, the mating structure of the limiting groove 130 and the limiting protrusion 250 directly restricts the displacement range of the tensioner in the first direction through physical blocking. When the tensioner tends to deviate along the first direction, the limiting protrusions 250 (or the edges of the grooves) on both sides of the tensioner will abut against the limiting grooves 130 (or protrusions) on both sides of the receiving cavity, preventing it from continuing to move. This ensures that the rack portion 210 of the tensioner is always precisely aligned with the toothed portion 310 of the adjusting gear 3 in the first direction, ensuring the stability of the meshing transmission and avoiding device malfunction due to misalignment.

[0078] The receiving cavity serves as the installation and movement space for the first tensioning member 2a and the second tensioning member 2b. If the tensioning member deviates excessively along the first direction, it may detach from the opening along the length of the receiving cavity, causing the entire limiting device to disintegrate and failing to achieve the tensioning and fixing function. The sliding engagement range of the limiting groove 130 and the limiting protrusion 250 is strictly limited within the length of the receiving cavity in the first direction. The limiting protrusion 250 of the tensioning member is always embedded in the limiting groove 130 of the receiving cavity (or vice versa), and cannot detach from either end of the receiving cavity. Structurally, this eliminates the risk of the tensioning member detaching from the installation space, improving the overall structural stability of the device. It is especially suitable for use scenarios where doors are frequently opened and closed and there is strong vibration. The engagement of the limiting groove 130 and the limiting protrusion 250 not only restricts displacement in the first direction but also provides auxiliary guidance for the movement of the tensioning member in the second direction. The mating surfaces of both components are precision machined, resulting in low sliding friction resistance. This also limits the tendency of the tensioner to twist or tilt during movement, ensuring that the tensioner always moves smoothly along the second direction and avoiding jamming or sticking caused by twisting.

[0079] To achieve a reliable connection between the base 1 and the top cover 4, embodiments of the present invention may employ a dual connection method using inner screws and outer bolts. For example... Figure 7As shown, in the first direction, the base 1 has a first connecting hole 141 on each side of the non-accommodating cavity area and a second connecting hole 142 on each side of the accommodating cavity area. The first connecting hole 141 can be designed as a threaded hole, and the second connecting hole 142 can be designed as a smooth hole. Correspondingly, the first connecting member 6a can be a set screw, which can be screwed into the threaded hole from the bottom of the base 1 to achieve a tight fit between the base 1 and the inner side of the top cover 4, preventing gaps between them and resisting the longitudinal impact force caused by door vibration. The second connecting member 6b can be a bolt. The bolt passes through the smooth hole from the outside of the base 1 and is fixed to the top cover 4, forming a lateral tension force, strengthening the lateral connection strength between the base 1 and the top cover 4, and preventing relative displacement between them along the first or second direction. The dual connection method makes the base 1 and the top cover 4 form a rigid connection, and the vibration resistance and deformation resistance are far superior to the single connection method, ensuring that the core components such as the tensioner and adjusting gear 3 in the accommodating cavity are always in a stable installation position, avoiding transmission failures caused by loose connections. Of course, the connection between the base 1 and the top cover 4 can also be achieved in other ways, such as snap-fit ​​or by using only a pair of bolts or screws.

[0080] In some embodiments, the first tensioning member 2a and / or the second tensioning member 2b are rigid members or have elasticity. When the inner wall of the hanging rail 7 is flat, has high dimensional accuracy, and requires high fixing strength, a rigid member (such as hard engineering plastic or metal) can be selected as the tensioning member. It has high structural strength and small deformation, and can generate a stable tensioning force through the adjustment of the gear 3, forming a rigid fit with the inner wall of the hanging rail 7, ensuring that the limiting device is fixed for a long time without loosening. It is suitable for heavy doors and high-frequency use scenarios. When the inner wall of the hanging rail 7 has slight unevenness, dimensional deviation, or the material of the hanging rail 7 is relatively soft (such as aluminum alloy thin-walled hanging rail 7), an elastic member 5 can be selected as the tensioning member. It has a certain deformation capacity and can fit the irregular surface of the inner wall of the hanging rail 7 through elastic deformation, filling the gap caused by dimensional deviation, and avoiding loosening due to loose fit. At the same time, the deformation of the elastic member 5 can buffer the impact force caused by the vibration of the door, prevent hard contact from causing scratches or indentations on the inner wall of the hanging rail 7, and protect the structure of the hanging rail 7.

[0081] In actual construction, the installation of the hanging rail 7 may have slight tilting, uneven spacing between the inner walls, and other errors. Traditional rigid tensioning components are prone to insufficient fit due to these errors, resulting in local gaps and affecting the fixing effect. However, elastic tensioning components can compensate for these installation errors through their own deformation: during tensioning, the elastic component 5 will adaptively deform according to the actual state of the inner wall of the hanging rail 7, ensuring that the contact between the tensioning component and the inner wall of the hanging rail 7 is a surface contact, increasing the contact area and friction. Even with slight installation errors, stable fixing can be achieved, reducing the construction precision requirements and improving the installation success rate.

[0082] like Figure 6As shown, the first tensioner 2a and the second tensioner 2b are centrally symmetrical structures. This central symmetry allows the first tensioner 2a and the second tensioner 2b to be completely interchangeable, eliminating the need to distinguish between the left and right tensioners. During assembly, workers can arbitrarily select two tensioners to install on either side of the adjusting gear 3 in the second direction, without needing to identify the direction or model, significantly reducing assembly time and improving efficiency. Simultaneously, it avoids problems such as transmission jamming and meshing misalignment caused by incorrect installation of the left or right tensioners, reducing the assembly error rate. Furthermore, the universal design reduces the types of parts in stock; only one type of tensioner needs to be stocked to meet production and after-sales requirements, reducing inventory management and production costs.

[0083] Because the first and second tensioning members 2b are centrally symmetrical, the meshing position and tooth contact area of ​​their rack portion 210 and the toothed portion 310 of the adjusting gear 3 are completely consistent. When the adjusting gear 3 rotates, it applies equal and opposite driving forces to the tensioning members on both sides, ensuring that both extend outward synchronously along the second direction. The tension force is evenly distributed on the inner walls of both sides of the hanging rail 7, preventing the limiting device from tilting or jamming due to excessive tension force on one side, or from becoming loose due to insufficient tension force on one side. This balanced force design makes the limiting device more securely fixed in the hanging rail 7, better resisting the vibration and impact of the door during operation, and improving the overall working stability of the device.

[0084] In some embodiments, such as Figure 6 and Figure 7 As shown, the first tensioning member 2a and the second tensioning member 2b further include an end guide structure and a middle guide structure. Both the end and middle guide structures adopt an interlocking form where "one side tensioning member structure is embedded in the mating area of ​​the other side tensioning member," ensuring that the two tensioning members remain tightly fitted during movement, forming a coordinated whole. This interlocking design prevents individual tensioning members from displacing independently due to unexpected forces (such as vibration of the hanging rail 7 or external impact), ensuring the synchronization of their movements. Simultaneously, the interlocking structure enhances the overall impact resistance of the tensioning members, preventing them from loosening from the receiving cavity due to severe vibration, further ensuring the structural integrity of the limiting device.

[0085] The end guide structure includes: an outer end guide strip 220 located at the end of one tensioner, and an inner end guide strip 230 located near the end of another tensioner; in a first direction, the outer end guide strip 220 and the inner end guide strip 230 are located on opposite sides of the same tensioner; the outer end guide strip 220 of one tensioner and the inner end guide strip 230 of the other tensioner are tightly fitted together. The end guide structure effectively limits the offset of the ends of the two tensioners in the first direction, preventing "swinging" or twisting of the tensioner ends, ensuring that both extend or retract synchronously in the second direction, and preventing problems such as incomplete tensioning on one side or device tilting due to end offset. Simultaneously, the tightly fitted guide strips can distribute the force on the ends of the tensioners, preventing deformation due to long-term vibration or impact, and improving structural durability.

[0086] The central guide structure includes a rack portion 210 located in the middle of one tensioner and a central guide strip 240 located in the middle of another tensioner. In a first direction, the rack portion 210 of one tensioner and the central guide strip 240 of the other tensioner are closely fitted together. The central guide structure can effectively prevent the middle of the tensioner from bending or shifting due to force (such as the meshing reaction force of the adjusting gear 3), ensuring that the rack portion 210 is always precisely aligned with the tooth profile 310 of the adjusting gear 3, avoiding transmission jamming and tooth wear caused by meshing misalignment; at the same time, the central guide strip 240 can distribute the force on the rack portion 210, reduce local stress concentration on the teeth, and extend the service life of the transmission structure.

[0087] Another aspect of the present invention provides a sliding door, such as Figure 1 and Figure 2 As shown, including the aforementioned limiting device for the hanging rail 7, a damper trigger structure 150 is formed at the bottom of the base 1.

[0088] This invention directly forms a damper trigger structure 150 at the bottom of the base 1 of the limiting device. When the door reaches the end of its travel, the damper trigger structure 150 first contacts the damper assembly 8, triggering the damper to start buffering. Subsequently, the tensioning and fixing structure of the limiting device forms a mechanical limit, completing the smooth stopping of the door. This integrated design reduces the number of components within the hanging rail 7, eliminates the installation and position calibration steps of independent damper trigger components, greatly simplifies the overall assembly process of the sliding door, improves production and construction efficiency, and reduces the risk of functional failure due to component misalignment.

[0089] Since the damper triggering structure 150 and the limiting device are integrally formed on the base 1, their relative positions are completely fixed, achieving precise coordination of triggering and limiting without additional adjustments. When the door is running, the damper triggering structure 150 can precisely trigger the damper at a preset position, avoiding the problem of premature or delayed damping activation caused by the positional offset of the trigger element in traditional separate designs; subsequently, the mechanical limiting structure of the limiting device precisely supports the door's stroke, ensuring that the door stops at a consistent position, preventing insufficient buffering leading to collisions or over-limiting causing the door to fail to close properly.

[0090] This sliding door utilizes the aforementioned limiting device, which offers advantages such as convenient installation, adjustable position, and stable fixation. This not only solves the pain points of traditional sliding doors, such as the easy omission of pre-embedded stops and high rework costs, but also accommodates the later addition and stroke adjustment needs of already installed hanging rails 7. Whether it's installing a new door, renovating an old door, or optimizing the stroke during use, all can be accomplished through the convenient operation of the limiting device, without the need to dismantle the door or rails. This further enhances the construction flexibility and ease of use of the sliding door, meeting the diverse needs of different users.

[0091] In this invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or in place of features of other embodiments.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the embodiments of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A limiting device for a hanging rail, characterized in that, The limiting device includes: a base (1), a first tensioning member (2a), a second tensioning member (2b), an adjusting gear (3), and a top cover (4). The top cover (4) is fixedly disposed on the top of the base (1). A receiving cavity is formed between the top cover (4) and the base (1). The first tensioning member (2a), the second tensioning member (2b), and the adjusting gear (3) are all installed in the receiving cavity. The base (1) has a gear seat (110) for mounting the adjusting gear (3) in the middle, and the gear seat (110) includes a gear ring portion (113); the adjusting gear (3) includes a toothed portion (310) and an operating portion (320). The first tensioner (2a) and the second tensioner (2b) each have a rack portion (210) extending in a first direction on their inner sides. The first tensioner (2a) and the second tensioner (2b) are respectively movably disposed on both sides of the adjusting gear (3) in a second direction. The movable direction of the first tensioner (2a) and the second tensioner (2b) is the second direction. The first direction is the length direction of the base (1), and the second direction is the width direction of the base (1). The height of the receiving cavity at the gear seat (110) is configured to be greater than the thickness of the toothed portion (310) of the adjusting gear (3), so that the adjusting gear (3) can move along its axial direction under the control of the operating unit (320) to enter the unlocked state. When the adjusting gear (3) is in the unlocked state, the toothed part (310) disengages from the gear ring part (113), so that the adjusting gear (3) can drive the rack parts (210) of the first tensioner (2a) and the second tensioner (2b) to move outward respectively through rotation in a specific direction, and cause the first tensioner (2a) and the second tensioner (2b) to be tensioned in the hanging rail (7) on both sides of the limiting device in the second direction respectively; When the adjusting gear (3) is locked, the toothed portion (310) meshes with the gear ring portion (113).

2. The limiting device for a hanging rail according to claim 1, characterized in that, The limiting device further includes an elastic element (5), which is disposed in the receiving cavity, with its two ends abutting against the inner wall of the adjusting gear (3) and the top cover (4) respectively, so as to provide the adjusting gear (3) with a thrust to automatically restore the locked state.

3. The limiting device for a hanging rail according to claim 2, characterized in that, The gear seat (110) has a countersunk hole structure, the countersunk hole includes a coaxial through hole (111) and a blind hole (112), and the gear ring portion (113) is formed on the outer periphery of the blind hole (112).

4. The limiting device for a hanging rail according to claim 3, characterized in that, The base (1) has a thickened boss (114) formed on the outer side of the gear seat (110); and / or, The inner wall surface of the top cover (4) has guide posts (410) formed at the location corresponding to the elastic member (5); and / or, The adjusting gear (3) has a guide hole (330) formed at the end facing the top cover (4).

5. The limiting device for a hanging rail according to claim 1, characterized in that, The base (1) forms limiting posts (120) on both sides of the gear seat (110) along the second direction, and the inner surface of the limiting post (120) in the second direction is an arc-shaped surface.

6. The limiting device for a hanging rail according to claim 1, characterized in that, The limiting device further includes a limiting groove (130) and a limiting protrusion (250) for limiting the movable range of the first tensioner (2a) and the second tensioner (2b). In the first direction, one of the limiting groove (130) and the limiting protrusion (250) is formed on both sides of the receiving cavity, and the other is formed on both sides of the first tensioner (2a) and the second tensioner (2b).

7. The limiting device for a hanging rail according to claim 1, characterized in that, The first tensioner (2a) and / or the second tensioner (2b) are rigid or elastic.

8. The limiting device for a hanging rail according to claim 1, characterized in that, The first tensioner (2a) and the second tensioner (2b) are centrally symmetrical structures.

9. The limiting device for a hanging rail according to claim 1, characterized in that, The first tensioner (2a) and the second tensioner (2b) further include: an end guide structure and a middle guide structure; The end guide structure includes: an outer end guide strip (220) located at the end of one tensioner, and an inner end guide strip (230) located near the end of another tensioner; in a first direction, the outer end guide strip (220) and the inner end guide strip (230) are located on both sides of the same tensioner; the outer end guide strip (220) of one tensioner and the inner end guide strip (230) of the other tensioner are closely attached to each other; The central guide structure includes: a rack portion (210) located in the middle of a tensioner, and a central guide strip (240) located in the middle of another tensioner; in a first direction, the rack portion (210) of one tensioner and the central guide strip (240) of the other tensioner are closely attached to each other.

10. A sliding door, characterized in that, Includes a limiting device for a hanging rail as described in any one of claims 1-9, wherein a damper trigger structure (150) is formed at the bottom of the base (1).

Images