Roof Structure of Building

Abstract

The present invention relates to a roof structure of a new type of building structure that prevents damage to a unit roof panel by allowing the longitudinal end of the unit roof panel to slide according to external temperature changes without being fixed, and further ensures that the entire end of the unit roof panel is connected to a sliding guide fixing plate so as to reliably prevent the unit roof panel from being lifted by wind. The sliding plate for mounting the roof panel, which is fixedly connected to the longitudinal end of the unit roof panel, includes a connecting plate for the sliding plate that is formed by bending downward from the longitudinal outer end of the sliding guide plate; and the unit roof panel includes a connecting plate for the roof panel that is formed by bending downward from the longitudinal end of the roof panel body, which covers the outer surface of the connecting plate for the sliding plate, and is connected to the connecting plate for the sliding plate.

Description

Technology Field

[0001] The present invention relates to a roof structure of a building structure in which a plurality of unit roof panels made of metal are continuously arranged in the width direction to form a roof, and in particular, to a structure for slidably supporting the ends of the unit roof panels. Background Technology

[0002] Prefabricated construction is a method primarily used when the roof of a building structure needs to be constructed quickly. Roofs of buildings constructed using this method are typically built by connecting exterior metal panels, such as surface-treated steel or aluminum. Forming a roof using metal panels offers the advantages of shortening the construction period and reducing construction costs, while also enhancing the aesthetic appeal of the finished building. Consequently, these metal panels are now widely used not only for prefabricated buildings but also for the roof construction of various other types of buildings.

[0003] As an example of a method for constructing the roof of such a building structure, Korean Registered Patent No. 10-1801102, "Roof structure of a building structure, method for constructing the roof of a building structure, and base panel for a roof" (registered Nov. 20, 2017), has been proposed.

[0004] In this conventional method of constructing a roof for a building structure, a base panel is installed on top of the purlin, saddle steel is installed on top of the base panel, insulation is installed after the saddle steel is installed, and roof connection clips and unit roof panels are installed on the saddle steel after the insulation is installed.

[0005] A unit roof panel consists of a roof panel body in the center in the width direction and end bends formed at both ends in the width direction of the roof panel body, and the end bends of adjacent unit roof panels overlap and are bent together so that a plurality of unit roof panels form a roof on the upper part of a building structure.

[0006] Meanwhile, metal unit roof panels expand and contract in response to external temperature changes, and in response to such expansion and contraction, it is common for roof connection clips to have a sliding structure or for unit roof panels to be installed so as to be sliding on roof connection clips.

[0007] However, due to the problem that the longitudinal ends of unit roof panels are prone to lifting by the wind and are easily blown away when lifted, the ends of unit roof panels are generally fixed to the building structure using bolts or the like.

[0008] Korean Registered Patent No. 10-1841058 "Roof of a building for reinforcing the end of a metal panel for a unit roof" (registered March 16, 2018), Korean Registered Patent No. 10-1994414 "Finishing assembly for a roof panel and method of construction thereof" (registered June 24, 2019), etc., present a structure in which the longitudinal end of a unit roof panel is fixed by a bolt.

[0009] However, when the longitudinal ends of unit roof panels are secured with bolts or similar fasteners in this manner, a problem arises in that the joints become vulnerable due to stress concentration caused by external temperature changes, making the unit roof panels prone to damage.

[0010] In order to solve the above-mentioned problems, Korean registered patent No. 10-2491897, "Roof structure of a building structure" (registered on January 19, 2023), includes a sliding plate for mounting a roof panel on a unit roof panel and a fixed plate for guiding the sliding panel to be fixedly connected to the building structure, so that the sliding plate for mounting the roof panel slides in a straight line along the fixed plate for guiding the sliding panel, thereby allowing the longitudinal end of the unit roof panel to slide according to external temperature changes without being fixed, thus preventing the unit roof panel from being damaged, and furthermore, the end of the unit roof panel is firmly connected to the fixed plate for guiding the sliding panel to prevent it from lifting up due to wind.

[0011] However, even with the above-mentioned conventional technology, since the structure is such that some of the ends of the unit roof panels are not connected to the sliding guide fixing plate, there is a risk that some of the ends of the unit roof panels will be lifted by the wind.

[0012] In addition, according to conventional technology, the most reliable method for joining unit roof panels and sliding guide fixing plates is rivet joining, but when attempting rivet joining, holes are formed in the unit roof panels, which increases the risk of rainwater entering the interior through the holes formed in the unit roof panels. Prior art literature

[0013] Republic of Korea Registered Patent No. 10-2491897 "Roof structure of a building structure" (Registered Jan. 19, 2023) Registered Patent No. 10-1841058 "Roof of a building for reinforcing the end of a metal panel for a unit roof" (Registered Mar. 16, 2018) Registered Patent No. 10-1994414 "Finishing assembly for a roof panel and method of constructing the same" (Registered June 24, 2019) Registered Patent No. 10-1967825 "Roof panel fixing device" (Registered Apr. 4, 2019) The problem to be solved

[0014] The present invention has been devised to solve the problems of the conventional technology described above, and proposes a new type of roof structure for a building structure in which the longitudinal ends of the unit roof panels are not fixed but can slide according to external temperature changes to prevent damage to the unit roof panels, and furthermore, the entire end of the unit roof panel is connected to a sliding plate for mounting the roof panel to reliably prevent the unit roof panels from lifting due to wind. means of solving the problem

[0015] To solve the above problem, the present invention comprises a cross-sectional structure including a roof panel body in the width direction and end bend portions formed at both ends in the width direction of the roof panel body, wherein the end bend portions of a unit roof panel made of a metal material extending in the length direction are folded while overlapping with the end bend portions of other unit roof panels adjacent in the width direction, so that a plurality of said unit roof panels form a roof on the upper part of a building structure; and a sliding guide fixing plate material that is fixedly coupled to the building structure, and is provided with a guide top plate having a plurality of straight through holes formed side by side in a straight shape extending along the length direction of the unit roof panel; A roof of a building structure comprising a sliding plate for mounting a roof panel, the sliding guide plate being fixedly coupled to the lower end of the longitudinal end of the unit roof panel and capable of sliding along the upper surface of the guide plate, and a plurality of sliding guide structures formed on the sliding guide plate to allow the sliding guide plate to slide linearly along the straight through hole of the guide plate and slidably coupled to the straight through hole; wherein the sliding guide plate comprises a guide plate contact portion in which the plurality of sliding guide structures are formed and which slides along the guide plate while in contact with the guide plate, and a guide plate spacing portion extending longitudinally outward from the guide plate contact portion and spaced apart from the guide plate; and wherein the sliding plate for mounting the roof panel comprises a connecting plate for the sliding plate that is bent downward at the longitudinally outer end of the guide plate spacing portion of the sliding guide plate; The above unit roof panel includes a roof panel coupling plate that is formed by folding downward at the longitudinal end of the roof panel body and covers the outer surface of the sliding plate coupling plate while being coupled to the sliding plate coupling plate;It is characterized in that the unit roof panel and the sliding plate for mounting the roof panel are configured to slide together along the guide plate by means of the connecting plate for the sliding plate and the connecting plate for the roof panel that are joined together.

[0016] In the above, it is preferable that the lower end of the roof panel connecting plate is bent to wrap around the lower end of the sliding plate connecting plate so that the roof panel connecting plate is connected to the sliding plate connecting plate.

[0017] In the above, the sliding guide structure may include a sliding guide arc-shaped band that is formed by cutting and plastically deforming a part of the sliding guide plate, extending in the longitudinal direction of the sliding guide plate and protruding convexly downward in an arc shape to penetrate the straight penetration hole of the guide plate, and a pair of anti-lift wing plates disposed on the lower part of the guide plate in a form extending outward in the width direction of the sliding guide arc-shaped band from both sides in the width direction of the middle part of the sliding guide arc-shaped band. Effects of the invention

[0018] As described above, the present invention provides a new type of roof structure for a building structure that prevents damage to the unit roof panel by allowing the longitudinal end of the unit roof panel to slide according to external temperature changes without being fixed, and further prevents the unit roof panel from being blown away by the wind by ensuring that the entire end of the unit roof panel is connected to a sliding plate for mounting the roof panel to reliably prevent it from lifting due to the wind. Brief explanation of the drawing

[0019] FIG. 1 is a conceptual cross-sectional view of a roof structure of a building structure according to one embodiment of the present invention, FIG. 2 is a perspective view showing a unit roof panel with a sliding plate fixedly connected for mounting the roof panel and a fixed plate for sliding guide separated. FIG. 3 is a perspective view showing the sliding plate for mounting roof panels and the unit roof panel separated. FIG. 4 is a perspective view of a sliding plate for mounting a roof panel and an enlarged perspective view with a portion cut away. FIG. 5 is an enlarged perspective view showing a portion of a sliding plate for mounting a roof panel cut out. FIG. 6 is a perspective view from below of a sliding guide structure of a sliding plate for mounting a roof panel. FIG. 7 is a perspective view and an enlarged perspective view of the main part of a fixed plate material for sliding guidance. FIG. 8 is a cross-sectional perspective view showing a state in which a sliding plate for mounting a roof panel is coupled to a fixed plate for sliding guides. FIG. 9 is a drawing showing the main parts of a sliding plate for mounting a roof panel and a fixed plate for sliding guidance separated. Specific details for implementing the invention

[0020] Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0021] Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0022] FIG. 1 is a conceptual cross-sectional view of a roof structure of a building structure according to one embodiment of the present invention; FIG. 2 is a perspective view showing a unit roof panel and a sliding guide fixing plate separated, with a sliding plate for mounting a roof panel fixedly coupled thereto; FIG. 3 is a perspective view showing a sliding plate for mounting a roof panel and a unit roof panel separated; FIG. 4 is a perspective view of a sliding plate for mounting a roof panel and an enlarged perspective view showing a part cut away from the sliding plate; FIG. 5 is an enlarged perspective view showing a part cut away from the sliding plate for mounting a roof panel; FIG. 6 is a perspective view of the sliding guide structure of the sliding plate for mounting a roof panel viewed from below; FIG. 7 is a perspective view of a sliding guide fixing plate and an enlarged perspective view of a main part; FIG. 8 is a cross-sectional perspective view showing the state in which the sliding plate for mounting a roof panel is coupled to the sliding guide fixing plate; FIG. 9 is a drawing showing the main part of the sliding plate for mounting a roof panel and the sliding guide fixing plate separated.

[0023] First, a structure is described in which the longitudinal ends of a plurality of unit roof panels (10) on which the sliding plate (200) for mounting the roof panels is mounted are slidably supported on the sliding guide fixing plate (100) via the sliding plate (200) for mounting the roof panels, by means of a plurality of unit roof panels (10) already presented in the prior art, a sliding guide fixing plate (100), and a sliding plate (200) for mounting the roof panels.

[0024] A plurality of unit roof panels (10) are provided to form a roof.

[0025] In Figures 1 and 2, only one longitudinal side of the unit roof panel (10) is shown.

[0026] Basically, the unit roof panel (10) is a structure in which the same cross-sectional structure is extended in the longitudinal direction.

[0027] The basic cross-sectional structure of the unit roof panel (10) is a structure in which a roof panel body (11) in the center of the width direction and end bend portions (12) formed at both ends of the roof panel body (11) in the width direction are formed.

[0028] The end bends (12) of adjacent unit roof panels (10) overlap and are bent together so that a plurality of unit roof panels (10) form a roof on the upper part of the building structure.

[0029] Since there are many known technologies for supporting the longitudinal middle portion of a unit roof panel (10), a description thereof is omitted.

[0030] Below, a structure that supports the longitudinal end of a unit roof panel (10) so as to be slidably supported is described.

[0031] A structural steel section (such as a Z-bar, structural angle, or structural C-shaped steel section, etc.) (not shown) is provided on the upper part of a building structure (especially a wall or a structure adjacent to a wall), and a sliding guide fixing plate (100) is fixedly connected to the upper part of the structural steel section by means of bolts or welding, etc.

[0032] As shown in FIG. 7, the sliding guide fixed plate material (100) is composed of a first side plate (110), a second side plate (120), a guide top plate (130), etc.

[0033] The guide plate (130) is a rectangular metal plate.

[0034] The first side plate (110) is a metal plate bent downward from one side in the longitudinal direction of the guide plate (130), and the second side plate (120) is a metal plate bent downward from the other side in the longitudinal direction of the guide plate (130).

[0035] Here, the longitudinal direction of the guide plate (130) corresponds to the longitudinal direction of the unit roof panel (10).

[0036] A plurality of straight through holes (131) are formed in the guide plate (130).

[0037] The straight through hole (131) is a straight hole extending along the longitudinal direction of the unit roof panel (10), and a plurality of straight through holes (131) are formed side by side.

[0038] A first insertion hole (111) in the shape of a "┴" is formed in the first side plate (110) and connected to one end of a straight through hole (131).

[0039] The second side plate (120) has a second insertion hole (121) in the shape of a "┴" that is connected to the other end of the straight through hole (131).

[0040] A sliding plate (200) for mounting a roof panel, which is fixedly coupled to the lower end of the longitudinal end of a unit roof panel (10), is slidably coupled to such a sliding guide fixed plate (100).

[0041] That is, a sliding plate (200) for mounting a roof panel is fixedly coupled to the end of a unit roof panel (10), and the sliding plate (200) for mounting a roof panel is slidably coupled to a fixed plate (100) for sliding guide.

[0042] As shown in FIG. 4, the sliding plate (200) for mounting roof panels is composed of a first fixing side plate (210), a second fixing side plate (220), a sliding guide plate (230), and a connecting plate (240) for the sliding plate.

[0043] The sliding guide plate (230) is a rectangular metal plate and can be fixedly attached to the lower surface of the longitudinal end of the unit roof panel (10) by means of adhesion or the like.

[0044] The sliding guide plate (230) can slide along the upper surface of the guide plate (130) of the sliding guide fixed plate material (100).

[0045] The first fixing side plate (210) is a metal plate bent upward from one side in the width direction (same as the width direction of the unit roof panel (10)) of the sliding guide plate (230), and can be fixedly connected to the end bend portion (11) on one side in the width direction of the unit roof panel (10) by means of adhesion, etc.

[0046] The second fixing side plate (220) is a metal plate bent upward from the other side in the width direction (same as the width direction of the unit roof panel (10)) of the sliding guide plate (230), and can be fixedly connected to the end bend portion (11) on the other side in the width direction of the unit roof panel (10) by means of adhesion, etc.

[0047] The sliding guide plate (230) includes a plurality of sliding guide structures (231).

[0048] In this embodiment, the sliding guide structure (231) is formed by cutting and plastically deforming a part of the sliding guide plate (230) to protrude downward.

[0049] In this embodiment, six sliding guide structures (231) are shown formed on one sliding guide plate (230), but this can be varied depending on the embodiment.

[0050] The sliding guide structure (231) is formed on the sliding guide plate (230) and is slidably coupled to the straight through hole (131) so that the sliding guide plate (230) can slide in a straight line along the straight through hole (131) of the guide plate (130).

[0051] The sliding guide structure (231) of this embodiment is a cross-shaped structure that protrudes convexly downward, but the shape of the sliding guide structure (231) can be changed in many different ways.

[0052] Each sliding guide structure (231) is composed of an arc-shaped band (231a) for penetrating a through hole and a pair of anti-lift wing plates (231b), and generally forms a cross shape.

[0053] The arc-shaped band (231a) for penetrating the penetration hole is in the form of a band extending in the longitudinal direction of the sliding guide plate (230), and is shaped to protrude convexly in an arc shape downward to penetrate the straight penetration hole (131) of the guide plate (130).

[0054] The arc-shaped band (231a) for penetrating the penetration hole is positioned to penetrate the straight penetration hole (131) of the guide plate (130) and guides the sliding guide plate (230) to slide along the extension direction of the straight penetration hole (131) of the guide plate (130).

[0055] The anti-lift wing plate (231b) is positioned at the bottom of the guide plate (130) in a shape that extends outward in the width direction from both sides of the middle portion of the arc-shaped band (231a) for penetrating the hole in the length direction of the arc-shaped band (231a) for penetrating the hole.

[0056] Such a lifting prevention wing plate (231b) prevents the sliding plate (200) for mounting roof panels and the unit roof panel (10) fixedly connected thereto from lifting due to strong winds.

[0057] The above-described sliding guide structure (231) is formed by cutting a part of the sliding guide plate (230) to form a cross shape and bending the cross shape into an arc shape.

[0058] The sliding guide structure (231) of this embodiment can be applied in various ways, and the sliding guide structure described in Korean Registered Patent No. 10-2491897 “Roof structure of a building structure” (registered Jan. 19, 2023) may be applied as is.

[0059] Below, the improvements made to the present invention compared with the prior art are explained.

[0060] The sliding guide plate (230) of the sliding plate (200) for mounting the roof panel has a longitudinal outer end that extends to the longitudinal end of the roof panel body (11) of the unit roof panel (10). To this end, the sliding guide plate (230) includes a guide plate contact area and a guide plate separation area. The guide plate contact area refers to a portion where a plurality of sliding guide structures (231) are formed and slide along the guide plate (130) while in contact with the guide plate (130). The guide plate separation area refers to a portion that extends longitudinally outward from the guide plate contact area and is separated from the guide plate (130). The longitudinal outer end of the guide plate separation area extends to the longitudinal end of the roof panel body (11) of the unit roof panel (10).

[0061] That is, the entire longitudinal end of the roof panel body (11) of the unit roof panel (10) is placed on the sliding guide plate (230) of the sliding plate (200) for mounting the roof panel, so that there is no part of the longitudinal end of the roof panel body (11) of the unit roof panel (10) that is not seated on the sliding guide plate (230) of the sliding plate (200) for mounting the roof panel. That is, a part of the longitudinal end of the roof panel body (11) of the unit roof panel (10) is seated on the contact area of ​​the guide plate (230), and another part of the longitudinal end of the roof panel body (11) of the unit roof panel (10) is seated on the guide plate spaced portion of the sliding guide plate (230).

[0062] Additionally, the sliding plate (200) for mounting the roof panel includes a connecting plate (240) for the sliding plate that is formed by bending downwards at the longitudinal outer end of the sliding guide plate (230). That is, the connecting plate (240) for the sliding plate is formed by bending downwards at the longitudinal outer end of the guide plate spacing portion of the sliding guide plate (230).

[0063] Additionally, the unit roof panel (10) includes a roof panel connecting plate (13) that is formed by bending downward at the longitudinal end of the roof panel body (11) and covers the outer surface of the connecting plate (240) for the sliding plate and is connected to the connecting plate (240) for the sliding plate.

[0064] The means of joining the sliding plate (240) and the roof panel (13) may include adhesive, as well as rivet joining.

[0065] When the connecting plate (240) for the sliding plate and the connecting plate (13) for the roof panel are joined by rivet joining, the connecting plate (13) for the roof panel is a part that has no relation to the sealing of the building structure, so even if holes for rivet joining are formed in the connecting plate (13) for the roof panel, rainwater, etc. cannot penetrate into the interior.

[0066] That is, since the connecting plate (240) for the sliding plate and the connecting plate (13) for the roof panel are placed in a part unrelated to the sealing of the building structure, various methods can be applied to connect them.

[0067] In addition, the connecting plate (240) for the sliding plate and the connecting plate (13) for the roof panel can have the function of protecting against wind or rainwater penetrating between the unit roof panel (10) and the sliding guide fixing plate (100), thereby increasing the airtightness of the building structure.

[0068] In this embodiment, as a means of joining the connecting plate (240) for the sliding plate and the connecting plate (13) for the roof panel, the lower end of the connecting plate (13) for the roof panel is bent (13a) to wrap around the lower end of the connecting plate (240) for the sliding plate.

[0069] This type of joining method not only enhances the aesthetic appeal of the building structure by ensuring that the end portion of the joining plate (13) for the roof panel is not visible from the outside, but also fundamentally prevents wind from entering between the unit roof panel (10) and the sliding plate (200) for mounting the roof panel, thereby fundamentally preventing vibration of the unit roof panel (10) or lifting of the unit roof panel (10) due to strong winds, etc.

[0070] In addition, the connecting plate (240) for the sliding plate and the connecting plate (13) for the roof panel, which are joined together, are generally perpendicular to the sliding movement direction (length direction) of the unit roof panel (10), so there is no risk of damage to the connection state.

[0071] As described above, the present invention has a structure in which a sliding plate (200) for mounting a roof panel is fixedly coupled to the longitudinal end of a unit roof panel (10), and the sliding plate (200) for mounting a roof panel is slidably coupled to a fixed plate (100) for sliding guide. More specifically, the unit roof panel (10) and the sliding plate (200) for mounting a roof panel slide together along a guide plate (130) by means of a connecting plate (240) for sliding plate and a connecting plate (13) for roof panel that are coupled together.

[0072] In addition, the sliding plate (200) for mounting the roof panel can slide along the sliding guide fixing plate (100), and the roof panel connecting plate (13) of the unit roof panel (10) is connected to the sliding plate connecting plate (240) of the roof panel mounting sliding plate (200), thereby reliably preventing vibration of the unit roof panel (10) or lifting of the unit roof panel (10) due to strong winds, etc.

[0074] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art to which the present invention pertains can implement the present invention in various forms.

[0075] Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0076] The scope of the present invention is defined by the claims set forth below. Explanation of the symbols

[0078] 10: Unit roof panel 11: Roof panel body 12: End bend 13: Connecting plate for roof panels 13a: Bending area 100 : Fixed plate for sliding guide 110 : First side plate 111 : First insertion opening 120 : Second side plate 121 : Second insertion opening 130 : Guide plate 131 : Straight penetration hole 200: Sliding panel for roof panel mounting 210: First fixing side plate 220: Second fixing side plate 230 : Sliding Information Board 231 : Sliding guide structure 231a: Arc-shaped strip for penetrating the penetration hole 231b: Wing plate for preventing lifting 240 : Connecting plate for sliding panels

Claims

Claim 1 A cross-sectional structure comprising a roof panel body in the width direction and end bend portions formed at both width directions ends of the roof panel body is extended in the longitudinal direction, wherein the end bend portions of a unit roof panel made of metal material are folded while overlapping with the end bend portions of other unit roof panels adjacent in the width direction, so that a plurality of said unit roof panels form a roof on the upper part of a building structure; and a guide top plate having a plurality of straight through holes formed in parallel in a straight shape extending along the longitudinal direction of the unit roof panel, and a sliding guide fixing plate material fixedly coupled to the building structure; A roof of a building structure comprising a sliding plate for mounting a roof panel, the sliding guide plate being fixedly coupled to the lower portion of the longitudinal end of the unit roof panel and capable of sliding along the upper surface of the guide plate, and a plurality of sliding guide structures formed on the sliding guide plate to allow the sliding guide plate to slide linearly along the linear through hole of the guide plate and slidably coupled to the linear through hole; wherein the sliding guide plate comprises a guide plate contact portion in which the plurality of sliding guide structures are formed and which slides along the guide plate while in contact with the guide plate, and a guide plate spacing portion extending longitudinally outward from the guide plate contact portion and spaced apart from the guide plate; The sliding plate for mounting the roof panel includes a connecting plate for the sliding plate that is formed by bending downward at the outer longitudinal end of the guide plate spacing portion of the sliding guide plate; and the unit roof panel includes a connecting plate for the roof panel that is formed by bending downward at the longitudinal end of the roof panel body, covering the outer surface of the connecting plate for the sliding plate, and is coupled with the connecting plate for the sliding plate.A roof structure of a building structure having a sliding function, characterized in that the unit roof panel and the sliding plate for mounting the roof panel are configured to slide together along the guide plate by means of the connecting plate for the sliding plate and the connecting plate for the roof panel that are joined together. Claim 2 A roof structure of a building structure having a sliding function, characterized in that, in claim 1, the lower end of the roof panel connecting plate is bent to wrap around the lower end of the sliding plate connecting plate so that the roof panel connecting plate is connected to the sliding plate connecting plate. Claim 3 A roof structure of a building structure having a sliding function according to claim 1 or 2, wherein the sliding guide structure comprises a sliding guide arc-shaped band that is formed by cutting and plastically deforming a part of the sliding guide plate and is formed in the longitudinal direction of the sliding guide plate and protrudes convexly downward in an arc shape to penetrate a straight penetration hole of the guide plate, and a pair of anti-lift wing plates disposed on the lower part of the guide plate in a form that extends outward in the width direction of the sliding guide arc-shaped band from both sides of the longitudinal middle portion of the sliding guide arc-shaped band.

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