Multi-functional detachment prevention device for sliding window sashes with easy assembly and sliding windows comprising the same

The multi-purpose anti-detachment device for sliding windows addresses detachment, finger pinching, and wind ingress by using a separable structure with a stopper, locking groove, and shock absorber, enhancing safety, durability, and airtightness.

KR102993085B1Active Publication Date: 2026-07-21ILSUNG TECH CO LTD
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Patent Information

Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
ILSUNG TECH CO LTD
Filing Date
2025-11-21
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Sliding windows face issues with structural detachment due to limited bonding strength, finger pinching accidents, inadequate cushioning against external impacts, and gaps leading to wind ingress and reduced airtightness, with existing anti-detachment devices being complex to install and lacking comprehensive solutions.

Method used

A multi-purpose anti-detachment device with a detachable structure that includes a body fixed to the window sash and a fastener, featuring a stopper, locking groove, rail groove, and shock absorber, allowing easy installation and addressing detachment, finger pinching, and wind ingress through a separable design.

Benefits of technology

The device enhances safety and durability by preventing detachment, reducing finger pinching accidents, improving airtightness, and cushioning against external shocks, while simplifying installation and maintenance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to a multi-purpose anti-detachment device for sliding window sashes that is easy to fasten and a sliding window equipped with the same. The purpose is to provide a multi-purpose anti-detachment device for sliding window sashes that is easy to fasten and a sliding window equipped with the same, which resolves the assembly angle problem that occurs when assembling window sashes to a window frame by installing a detachable anti-detachment device on the upper part of each window sash at the closing portion of the sliding window, improves constructability by designing a detachable structure so that the main body of the anti-detachment device is installed first before assembling the window sash, and the fastener is connected after assembly, and comprehensively resolves problems such as detachment of the window sash due to external impact, finger pinching accidents, and wind ingress within a single structure. The present invention features a multi-purpose anti-detachment device for a sliding window sash that is easy to fasten and a sliding window equipped with the same, wherein the structure comprises a main body (1) of the anti-detachment device that is fixedly installed on the side of the window sash and a fastener (2) that is detachably coupled thereto, wherein the main body (1) of the anti-detachment device comprises a stopper (11) protruding forward, a locking groove (12) into which the fastener (2) is inserted, a rail groove (13) through which a rail (510) of the window frame (500) passes, a locking projection (131) formed on the inner side thereof, and a shock absorbing part (14) inserted into the inner support part (141) of the stopper (11), and the fastener (2) comprises a lower locking part (21) inserted into the locking groove (12), a groove (22) with an open top, and a pair of elastic fasteners (23) protruding from both sides of the groove (22) and fastened to the locking projection (131).
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Description

Technology Field

[0001] The present invention relates to a multi-purpose anti-detachment device for a sliding window sash that is easy to fasten and a sliding window equipped with the same. More specifically, the invention relates to a multi-purpose detachable anti-detachment device configured to be detachably mounted on a window sash to prevent the window sash from detaching from the rail of the window frame, to cushion external impacts, and to block hand pinching accidents and wind ingress, and a sliding window equipped with the same. Background Technology

[0002] Changho refers to architectural components that collectively refer to windows and doors. They perform the function of isolating the interior from the exterior to block the influx of wind or dust from the outside, while allowing natural light to enter or ventilating the indoor air.

[0003] Generally, a window or door consists of a frame (or door frame) that forms the framework and a sash (or door) that is fixed to the frame or operates to be openable and closable. The frame is fixedly installed in the opening of a building to ensure the structural stability of the entire window or door, while the sash is coupled to the frame to perform opening and closing movements, thereby serving the function of blocking or opening the interior and exterior.

[0004] Windows come in various forms, including casement, folding, rotary, and sliding types. Among these, sliding windows feature a structure where the sash moves horizontally to open and close, offering the advantages of excellent space utilization and ease of operation.

[0005] Sliding windows operate by moving the sash left and right along a horizontal rail installed on the window frame; generally, rollers are mounted on the bottom of the sash to drive along the rail, and handles or fasteners are installed on the sides of the sash to allow the user to directly open and close it.

[0006] However, the sliding window as described above has several problems due to its structural characteristics, which involve assembling window sashes into a window frame.

[0007] Generally, sliding windows are installed by assembling window sashes onto pre-existing window frames in a building. During this process, the upper part of the sash is inserted diagonally into the upper rail of the frame, and then the lower part is placed on the rail while standing upright. Since the sash must enter the rail while maintaining a specific assembly angle, it has structural limitations that make it difficult to achieve complete contact or secure fixation with the upper rail. Consequently, the bonding strength between the sash and the upper rail is limited, and there is a possibility that the sash may lift or detach from the upper rail in the event of external impact or vibration.

[0008] Due to these structural characteristics, the window sash may lift off the rail or detach due to external impact or excessive force from the user. This poses a problem as it can lead to safety accidents, particularly when used by children or the elderly, and may cause the sash to fall or break.

[0009] In addition, there is a risk of finger pinching accidents due to contact with the window frame as the window sash closes. However, conventional sliding windows generally lack or have insufficient cushioning structures between the window sash and the window frame, so there is a problem that there is a risk of fingers or parts of the body getting pinched when they close quickly.

[0010] Furthermore, in the event of an earthquake or external vibration, window sashes may shake, derail from the rails, or collide with the frame, potentially causing damage. However, existing window structures lack sufficient cushioning capabilities against such vibrations, posing a problem that makes it difficult to ensure structural stability and user safety.

[0011] In addition, since the window sash is structured to slide left and right with the lower roller resting on the rail, a structural gap occurs between the roller and the rail. Consequently, gaps are formed in the frontal and lateral directions between the window sash and the window frame; these gaps act as passages for outside wind to enter the room, causing problems with reduced airtightness and thermal insulation. As a result, there is a problem in that the comfort of the indoor environment is reduced and it has a negative impact on energy efficiency.

[0012] Meanwhile, conventionally, there is a detachment prevention device to prevent the window sash from detaching from the window frame,

[0013] Most existing anti-detachment devices are installed on the window frame to prevent the window sash from detaching, or are attached to the window sash to prevent detachment, but there is a problem with poor workability because the installation is complex or requires separate tools.

[0014] In particular, since the structure attached separately to the side of the window sash must be installed after the window frame is assembled due to the assembly angle issue when assembling with the window frame, the quality of installation may vary depending on the skill level of the worker, and depending on site conditions, the installation time may be delayed or the fixing force may appear uneven.

[0015] Furthermore, most conventional anti-detachment devices are designed solely to prevent detachment, and thus have limitations in that they cannot comprehensively address issues such as finger pinching accidents caused by contact with the window frame during sliding window use, reduced airtightness and thermal insulation through lateral gaps between the window sash and the rail, and structures capable of cushioning external shocks like earthquakes. Prior art literature

[0016] Korean Published Patent Application No. 10-2025-0007900 (2025.01.14.) Korean Registered Patent Application No. 10-1562619 (2015.10.16.) Korean Registered Patent Application No. 10-1583722 (2016.01.04.) Korean Registered Patent Application No. 10-1606751 (2016.03.22.) The problem to be solved

[0017] The objective of the present invention, which aims to solve the aforementioned problems, is to provide a multi-purpose anti-detachment device for sliding window sashes that is easy to fasten and a sliding window equipped with the same, which resolves the assembly angle issue that occurs when assembling window sashes to a window frame by installing a detachable anti-detachment device on the top of each window sash at the closing portion of the sliding window, improves constructability by designing a detachable structure in which the main body of the anti-detachment device is installed first before assembling the window sash, and the fastener is connected after assembling the window sash, and integrally solves problems such as window sash detachment due to external impact, finger pinching accidents, and wind ingress within a single structure. means of solving the problem

[0018] The present invention, which performs the task of achieving the above-mentioned purpose and eliminating conventional defects, comprises: a body of an anti-detachment device fixedly installed on the side of a window sash of a sliding window;

[0019] It comprises a fastener that is detachably coupled to the main body of the above-mentioned anti-detachment device, and

[0020] The above anti-detachment body comprises: a stopper formed protruding forward to alleviate contact with the window frame; a locking groove formed at the top of the stopper into which a fastening member is inserted; a rail groove formed in the center through which the rail of the window frame passes; a locking projection formed protruding inwardly from the rail groove; and a shock absorbing part inserted and installed in a support formed on the inner side of the stopper.

[0021] This is achieved by providing a multi-purpose anti-detachment device for a sliding window sash that is easy to fasten, characterized by comprising: a lower locking part formed at the bottom and inserted into the locking groove; a groove formed at the center with an open top; and a pair of elastic fastening parts protruding from both sides of the groove and engaged with the locking projection of the rail groove.

[0022] In a preferred embodiment, the fastener is inserted into the anti-detachment body through a catch groove formed at the top of the stopper after the window sash is assembled to the window frame, and the elastic fastener is elastically coupled to the catch projection through a rotational movement and fixed in a vertical direction.

[0023] In a preferred embodiment, the shock absorber is composed of a coil spring or an elastic body, and is characterized by absorbing vibrations caused by external shocks such as earthquakes to prevent damage and detachment of the anti-detachment device and to reduce structural detachment of the window sash.

[0024] In a preferred embodiment, the fastener is configured to be coupled to the anti-detachment body after the window sash is assembled, and the anti-detachment body does not protrude above the height of the window sash, and the fastener protrudes above the anti-detachment body and is inserted into the window frame, thereby preventing the window sash from detaching.

[0025] In a preferred embodiment, the anti-detachment body and the fastener are characterized by being mounted respectively on the upper part of the closing portion of the left and right window sashes.

[0026] A multi-purpose anti-detachment device for a sliding window sash, characterized in that, in a preferred embodiment, the anti-detachment device body and the fastener are each additionally mounted at the bottom of the closing portion in addition to the top.

[0027] In a preferred embodiment, the lower catch portion protruding from the bottom of the fastener is characterized by having a curved cross-section from the side to the bottom for vertical rotation after being inserted obliquely into the catch groove of the stopper.

[0028] The present invention, in other embodiments,

[0029] In a sliding window in which a window sash is installed in a window frame,

[0030] This is achieved by providing a sliding window characterized by having the above-mentioned multi-purpose anti-detachment device installed. Effects of the invention

[0031] The present invention, having the above-described features, solves the problem of angle interference occurring during window assembly by adopting a separable structure, and allows for the convenient implementation of a detachment prevention function even after the window sash is assembled, thereby providing the effect of improving convenience during on-site construction and reducing the burden on workers.

[0032] In addition, the present invention has the effect of preventing shaking and damage to windows and doors through a cushioning function that responds to external shocks or vibrations, and improving the durability and safety of the structure.

[0033] In addition, the present invention has the effect of preventing hand pinching accidents and ensuring user safety through a structure that mitigates contact with the window frame.

[0034] In addition, the present invention has the effect of improving the airtightness and thermal insulation of windows and doors and maintaining the comfort of the indoor environment by effectively blocking wind inflow through the gap between the window sash side and the rail.

[0035] In addition, the present invention has the effect of reducing construction time and simplifying maintenance due to a structure that allows for assembly without tools, thereby enabling overall cost reduction.

[0036] As described above, the present invention is a useful invention with various effects, and its industrial utilization is highly anticipated. Brief explanation of the drawing

[0037] FIG. 1 is a perspective view of a multi-purpose anti-detachment device according to one embodiment of the present invention, and FIG. 2 is a rear perspective view of a multi-purpose anti-detachment device according to one embodiment of the present invention, and FIG. 3 is an exploded perspective view of a multi-purpose anti-detachment device according to one embodiment of the present invention, and FIG. 4 is an exemplary diagram viewed from the front of a method for fastening a multi-purpose anti-detachment device according to one embodiment of the present invention, and FIG. 5 is an exemplary diagram viewed from the rear of a method for fastening a multi-purpose anti-detachment device according to one embodiment of the present invention, and FIG. 6 is a plan view showing a structure in which a multi-purpose anti-detachment device according to one embodiment of the present invention is installed on a sliding window, and FIG. 7 is a side view illustrating a structure in which a multi-purpose anti-detachment device according to one embodiment of the present invention is installed on a sliding window. Specific details for implementing the invention

[0038] The configuration and operation of an embodiment of the present invention will be described in detail below in conjunction with the attached drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0039] FIG. 1 is a perspective view of a multi-purpose anti-detachment device according to an embodiment of the present invention, FIG. 2 is a rear perspective view of a multi-purpose anti-detachment device according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a multi-purpose anti-detachment device according to an embodiment of the present invention, FIG. 4 is an example view of a fastening method of a multi-purpose anti-detachment device according to an embodiment of the present invention viewed from the front, FIG. 5 is an example view of a fastening method of a multi-purpose anti-detachment device according to an embodiment of the present invention viewed from the rear, FIG. 6 is a plan view showing a structure in which a multi-purpose anti-detachment device according to an embodiment of the present invention is installed on a sliding window, and FIG. 7 is a side view showing a structure in which a multi-purpose anti-detachment device according to an embodiment of the present invention is installed on a sliding window.

[0040] As described above, the anti-detachment device according to the present invention is installed on a window frame (500) and includes an anti-detachment device body (1) fixed to the upper side of one side of a window sash (600) fitted with glass (700) that travels left and right along a rail (510) formed on the window frame (500) by a lower roller (610), and a fastener (2) coupled to the anti-detachment device body (1).

[0041] The anti-detachment body (1) is configured to include a stopper (11), a catch groove (12), a rail groove (13), a catch projection (131), a shock absorbing part (14), a support part (141), and a piece fastening groove (15), and the fastening member (2) is configured to include an elastic fastening part (23) and a lower catch part (21).

[0042] The main body (1) and the fastener (2) of the anti-detachment device can be formed from synthetic resin or metal and are structured to be separable from each other. This separable structure allows for flexible application during the construction phase by first assembling the window sash attached to the side of the main body (1) to the window frame, and then subsequently installing the fastener (2) on the main body (1).

[0043] This structure is not constrained by the assembly angle or sequence between the window sash and the frame, thereby enhancing construction convenience while enabling efficient response during maintenance and replacement work.

[0044] Furthermore, the anti-detachment device of the present invention is configured to simultaneously achieve various purposes, such as shock absorption, prevention of finger pinching, and ensuring airtightness, in addition to the function of preventing the detachment of the window sash. Accordingly, it contributes to improving the safety and functionality of windows and provides high versatility applicable to various window structures.

[0045] The composition and function of the anti-detachment device are explained in detail below.

[0046] The above anti-detachment body (1) is fixedly installed on the upper part of the central closing bar facing each other of the window sash (600), and is configured to be pre-mounted to the window sash by fastening a screw, such as a bolt, through the screw fastening groove (15) before assembling the window. This increases work efficiency during window installation and ensures installation stability. Afterwards, the fastening member (2) can be assembled.

[0047] In addition, the anti-detachment body (1) can be reinforced by additionally mounting it on the lower part of the closure section in addition to the upper part. Afterwards, the fastener (2) can be assembled in the same way.

[0048] A stopper (11) is formed protrudingly on the outer side, which is the direction in which it contacts the frame of the window frame (500) when the closed window sash is opened, at the front of the main body (1) of the anti-detachment device.

[0049] The stopper (11) is formed as a hollow protruding structure and serves to prevent accidents in which fingers are pinched by mitigating direct contact with the window frame (500) during the process of closing the window sash (600). Here, the term "window frame" includes the vertical frames on both sides of the window frame or the rail formed on the vertical frames. However, the shape of the stopper according to the present invention is not limited to the illustrated embodiment, and it is sufficient if it is formed to protrude toward the window frame and can mitigate direct contact with the window frame (500) or the rail protruding horizontally from the window frame during the process of closing the window sash (600).

[0050] A locking groove (12) is formed at the joint portion with the anti-detachment body (1), where the lower part of the rail groove (13) is located and the protrusion of the stopper (11) begins, so that the lower locking portion (21) of the fastener (2) can be inserted. This locking groove (12) performs the function of guiding the initial fixed position of the fastener (2), and during assembly, it guides the rotational direction of the fastener (2) to help align the position and increases fastening stability.

[0051] In the center of the main body (1) of the anti-detachment device, a rail groove (13) is provided in a U-shape with an open top, corresponding to the cross-sectional shape of the rail (510) formed on the window frame (500). The rail groove (13) is a structure that supports the window sash (600) so that it can travel stably in the vertical direction without shaking, and contributes to improving the alignment and durability of the window.

[0052] A catch (131) is formed protrudingly on the inner side of the rail groove (13), that is, in the direction where the window sash is inserted, and this catch (131) is structured so that the elastic fastening part (23) of the fastener (2) is elastically deformed and caught. According to one embodiment, the elastic fastening part (23) is composed of two parts, each having a triangular cross-sectional shape. When fastened, the elastic fastening part (23) enters along the catch (131) and is elastically contracted by being pressed in the direction facing each other due to the inclination of the triangular cross-section. Afterward, when the pressure is released as it passes the end of the catch (131), it is restored to its original shape by the elastic restoring force, and the rear end of the triangular cross-section is caught on the catch (131), thereby firmly fixing the fastener (2) to the anti-detachment body (1).

[0053] Through this, the fastener (2) can effectively prevent the window sash (600) from detaching from the window frame (500) due to external impact or vibration.

[0054] An upwardly protruding shock absorbing part (14) is disposed on the upper inner lower surface of the stopper (11), that is, on the inner boundary area where the rail groove (13) is located and the stopper (11) begins to protrude, and this shock absorbing part is stably supported by a support part (141). The support part (141) performs the role of supporting the shock absorbing part (14) so ​​that it is fixed in an accurate position and can effectively respond to external shocks.

[0055] The shock absorber (14) may be composed of a material having elastic restoring force, such as a coil spring or an elastic body, and effectively absorbs and disperses not only the repetitive shocks occurring during the opening and closing process of the window sash (600), but also vibrations and loads transmitted from the external environment, such as earthquakes or strong winds. In particular, considering the structural characteristics in which the fastener (2) is elastically coupled to the catch (131) and continuously receives a load, the shock absorber (14) plays an important role in preventing sagging or damage of the fastener.

[0056] This configuration allows the fixed state of the fastener (2) to be maintained stably for a long period of time, and contributes to improving the safety and durability of the entire window system by effectively preventing the window sash (600) from detaching from the window frame (500) due to external impact.

[0057] The above fastener (2) is configured to be a detachable structure that a worker connects to the main body (1) of the anti-detachment device after assembling the window frame, and is positioned higher than the top of the main body (1) of the anti-detachment device when fastened so as not to detach the window sash from the window frame.

[0058] A protruding locking part (21) is formed at the bottom of the fastener (2). The lower locking part (21) is inserted into the joint portion with the anti-detachment body (1), where the lower part of the rail groove (13), which is formed by cutting into the top of the stopper (11) of the anti-detachment body (1), is located. This locking groove (12) guides the lower locking part (21) of the fastener (2) to be seated in the correct position. Through this, the fastener (2) is stably aligned without horizontal shaking in the pre-rotation stage, and subsequently forms a reference position for rotational fastening.

[0059] The lower locking part (21) is formed to have a curved cross-section from the side to the bottom so that it can be inserted obliquely into the locking groove (12) of the stopper and rotated vertically.

[0060] A groove (22) with an open top is formed in the central part of the fastener (2), and a pair of elastic fasteners (23) are formed protruding from both sides of the groove (22). The elastic fasteners (23) are made of a protruding structure made of an elastic material having a triangular cross-section, and when the fastener (2) is rotated, they elastically contract as they enter along the catch (131) formed protruding from the inside of the anti-detachment body (1). Afterward, they are restored as they pass the end of the catch (131), and as the rear end catches on the catch, the fastener (2) is firmly fixed in the vertical direction.

[0061] The above groove (22) is formed between the elastic fastening parts (23) and provides a receiving space corresponding to the cross-sectional shape of the rail (510) formed in the window frame (500). This groove overlaps with the groove structure of the U-shaped rail groove part (13) provided on the upper part of the anti-detachment body (1) to guide the rail (510) to be positioned correctly and to induce the fastening member (2) to be in close contact with the rail groove part (13).

[0062] The above fastener (2) is configured to be in close contact with the rail groove (13), so that it can effectively block the inflow of external wind through the gap in the rail (510) of the window frame (500). As a result, the airtightness and thermal insulation of the window are improved, and the comfort of the indoor environment is maintained.

[0063] The operation of the present invention configured as described above is as follows.

[0064] The present invention, configured as described above, operates by fixing and installing a detachment prevention device body (1) on the upper end of each of the closing rods on both sides of the sliding window sash (600), assembling the window sash (600) onto the rail (510) of the window frame (500), and then inserting a fastener (2) into the detachment prevention device body (1) and rotating it to fasten it in a vertical direction.

[0065] The lower locking part (21) of the fastener (2) is inserted obliquely into the locking groove (12) of the anti-detachment body (1), and when rotated, the elastic fastener (23) is elastically coupled to the locking projection (131) of the anti-detachment body (1), thereby firmly fixing the fastener (2) in a vertical position.

[0066] At this time, the upper part of the fastener (2) is positioned to block the rail groove (13) of the main body (1) of the anti-detachment member, and is formed to protrude upward toward the window frame (500) more than the upper part of the rail groove, thereby structurally preventing the window sash (600) from being lifted and detached from the window frame.

[0067] In addition, the fastener (2) is positioned to block the gap between the top of the window sash and the window frame to suppress the inflow of outside air and to improve the airtightness and thermal insulation of the window.

[0068] In addition, a stopper (11) is formed at the front of the main body (1) of the anti-detachment device to guide the rotational direction of the fastener (2) and prevent the window sash from coming into direct contact with the window frame, thereby preventing finger pinching accidents. Generally, when opening a window, if you hold the edge of the window sash or the handle and slide it all the way, an accident may occur in which fingers get caught between the window sash frames. However, the stopper (11) of the present invention protrudes to a certain length, thereby maintaining a gap so that the window sashes do not completely align, thus preventing such accidents.

[0069] In addition, the shock absorbing part (14) positioned at the bottom of the anti-detachment body (1) supports the bottom of the fastened fastener (2) from below, and prevents shaking or damage to the fastener when external shock or vibration occurs, thereby increasing the stability of the overall structure.

[0070] As described above, the multi-purpose anti-detachment device according to the present invention prevents the detachment of the window sash and contributes to improving the safety and durability of the window.

[0071] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0072] (1) : Main body of the anti-detachment device (2) : Fastener (11) : Stopper (12) : Locking groove (13) : Rail groove (131) : Stopper (14) : Shock absorber (141) : Support (15) : Screw fastening groove (21) : Lower locking part (22) : Home (23) : Elastic fastening part (500) : Window frame (510) : Rail (600) : Window sash (610) : Roller (700) : Glass

Claims

Claim 1 The anti-detachment device body (1) fixedly installed on the side of the window sash (600) of a sliding window; and the fastener (2) detachably coupled to the anti-detachment device body (1); wherein the anti-detachment device body (1) comprises: a stopper (11) formed protruding forward to relieve contact with the window frame (500); a catch groove (12) formed at the top of the stopper (11) into which the fastener (2) is inserted; a rail groove (13) formed in the center through which the rail (510) of the window frame (500) passes; a catch projection (131) formed protruding inwardly from the rail groove (13); and a shock absorber (14) inserted and installed in a support portion (141) formed on the inner side of the stopper (11); and wherein the fastener (2) comprises a bottom catch portion (21) formed at the bottom and inserted into the catch groove (12); and a groove (22) formed in the center with an open top. A pair of elastic fastening parts (23) protruding from both sides of the groove (22) and engaged with the catch (131) of the rail groove (13); wherein the anti-detachment body (1) does not protrude above the height of the window sash (600), and the fastening member (2) is inserted into the anti-detachment body (1) through the catch groove (12) formed at the top of the stopper (11) after the window sash (600) is assembled to the window frame (500), and the elastic fastening part (23) is elastically coupled to the catch (131) through rotational movement and fixed in a vertical direction, and the anti-detachment body (1) protrudes above the anti-detachment body (1) and is inserted into the window frame (500) to prevent the window sash (600) from detaching, and the shock absorbing part (14) is composed of a coil spring or an elastic body to absorb vibrations caused by external shocks such as earthquakes, thereby preventing damage and detachment of the anti-detachment. A multi-purpose anti-detachment device for an easy-to-fasten sliding window sash, characterized by reducing structural detachment of the window sash (600). Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A multi-purpose anti-detachment device for sliding window sashes that is easy to fasten, characterized in that, in claim 1, the anti-detachment device body (1) and the fastening device (2) are each mounted on the upper part of the closing portion of the left and right window sashes (600). Claim 6 A multi-purpose anti-detachment device for a sliding window sash according to claim 5, characterized in that the anti-detachment device body (1) and the fastener (2) are each additionally mounted at the bottom of the closing portion in addition to the top. Claim 7 A multi-purpose anti-detachment device for a sliding window sash that is easy to fasten, characterized in that, in claim 1, the lower locking portion (21) protruding from the lower end of the fastening member (2) is formed to have a curved cross-section from the side to the lower end for vertical rotation after being inserted obliquely into the locking groove (12) of the stopper. Claim 8 A sliding window with a window sash installed in a window frame, characterized in that a multi-purpose anti-detachment device according to any one of claims 1, 5 to 7 is installed.