Locking device for retractable seat

Abstract

A locking device for a retractable seat comprises a withdrawal locking part for making a horizontal frame, which moves a unit seat in the front-rear direction, become a locked state or an unlocked state in a withdrawal direction. The withdrawal locking part may comprise: a hinge member hinge-coupled to an upper end part of a bracket to be rotatable around a hinge shaft disposed in a transverse direction; a withdrawal locking hook provided at a rear end part of the hinge member and caught by or separated from a bracket of an adjacent horizontal frame to allow unit seats to be in a withdrawal locking state or withdrawal unlocking state each other; and a withdrawal unlocking pin provided to penetrate the withdrawal locking hook in the horizontal direction and protrude toward the inner side thereof. When the withdrawal unlocking pin is lifted and the withdrawal locking hook is then rotated forward, the withdrawal locking hook is separated from a bracket of an adjacent horizontal frame to be in the withdrawal unlocking state.

Description

Locking device for retractable stands

[0001] The present invention relates to a locking device for a retractable bleacher, and more particularly, to a locking device for a retractable bleacher that enables the withdrawal and storage operations of the retractable bleacher to always be sequential and stable, and that can improve the durability and maintainability of the retractable bleacher.

[0002] Retractable bleachers are typically used to efficiently utilize space in auditoriums, performance halls, gymnasiums, auditoriums, and event venues. When there are no events, performances, or games taking place, the retractable bleachers can be stored to utilize the space they occupy. They can also be extended to increase seating capacity, allowing for more spectators.

[0003] Specifically, the above-mentioned retractable viewing seats are configured in a stepped manner with a movable unit viewing seat, at least one passive unit viewing seat, and a fixed unit viewing seat, such that the movable and passive unit viewing seats are sequentially unfolded by power or manual operation, and each unfolded movable and passive unit viewing seat is folded under the fixed unit viewing seat.

[0004] In order to prevent the individual seats from moving artificially when the above retractable seats are pulled out or retracted, a locking device is installed. The locking device of the conventional retractable seats is disclosed in Patent No. 10-2103820.

[0005] However, since the locking device is provided with separate locking devices for withdrawal and storage, the structure of the locking device is complex, so the locking device is frequently damaged or malfunctions, and the manufacturing cost of the locking device increases.

[0006] The present invention provides a locking device for a retractable viewing seat having a simple structure and in which a locking part at the time of withdrawal and a locking part at the time of storage are linked.

[0007] A locking device of a retractable spectator seat, in which a horizontal frame for moving a unit spectator seat in the front-back direction and a vertical frame vertically erected on the upper surface of the horizontal frame are installed, comprises: a bracket provided on the front upper surface of the horizontal frame, the inner end of which protrudes inwardly and a bushing is installed on the protruding end; a guide bar provided on the bracket, the front end of which is slidably connected to the bracket, the central portion of which is slidably connected to the bushing of an adjacent horizontal frame, and the rear end of which is connected to the vertical frame; and a pull-out locking portion provided on the bracket, which makes the horizontal frame locked or unlocked in the pull-out direction; and the pull-out locking portion comprises: a hinge member that is hinge-connected to be rotatable around a hinge axis horizontally arranged on the upper end of the bracket; a pull-out locking hook provided on the rear end of the hinge member, which is caught on or separated from the bracket of an adjacent horizontal frame so that the unit spectator seat is in a pull-out locked or unlocked state; and a pull-out locking hook that penetrates the pull-out locking hook in the horizontal direction. It includes a pull-out lock release pin that is provided to protrude toward the inner side, and when the pull-out lock release pin is lifted to rotate the pull-out lock hook forward, the pull-out lock hook can be separated from the bracket of the adjacent horizontal frame and brought into a pull-out unlocked state.

[0008] According to one embodiment of the present invention, the locking device further includes a storage locking part provided on one side of the vertical frame and configured to lock or unlock the horizontal frame in a storage direction, and the storage locking part can move the extraction lock release pin.

[0009] According to one embodiment of the present invention, the storage locking unit includes a rotation member that is provided on the outer surface of the vertical frame and is rotatably coupled to a rotation axis that is disposed to penetrate the vertical frame in a transverse direction, a storage locking hook that is provided on the front end of the rotation member and is caught on or separated from a bracket of an adjacent horizontal frame so that the unit seats are in a storage-locked state or a storage-unlocked state, and an operating bar that is provided to be inclined upwardly toward the front from the rotation member, and when stored, when the horizontal bar at the rear end of the audience seat section provided on the upper end of the vertical frame retracts and pushes the operating bar to rotate it rearward, the storage locking hook can be separated from the bracket of the adjacent horizontal frame and brought into a storage-unlocked state.

[0010] According to one embodiment of the present invention, when the storage locking part is moved forward during withdrawal, the withdrawal lock release pin of the adjacent horizontal frame can be lifted.

[0011] According to one embodiment of the present invention, a rotation angle limiting groove is provided in the rotating member, a protruding pin that fits into the rotation angle limiting groove is provided on the outer surface of the vertical frame, and the rotation angle of the storage lock hook can be limited by the rotating member being caught on the protruding pin.

[0012] According to one embodiment of the present invention, the unit seats are composed of a movable unit seat, a fixed unit seat, and at least one passive unit seat between the movable unit seat and the fixed unit seat, and the bracket, the guide bar, the pull-out locking part, and the storage locking part are provided on the horizontal frame and the vertical frame of the passive unit seat, and the bracket, the guide bar, the storage locking part, and the seat step are provided on the horizontal frame and the vertical frame of the movable unit seat, and the bracket may be provided on the horizontal frame and the vertical frame of the fixed unit seat.

[0013] According to one embodiment of the present invention, the storage locking part of the movable unit viewing seat may include the rotating member and the storage locking hook excluding the operating bar.

[0014] According to one embodiment of the present invention, the storage locking part of the movable unit spectator seat is provided on the inner surface of the vertical frame, and further includes a rotary lever coupled to rotate an upper end thereof together with the rotation axis, and a connecting bar extending forwardly that is rotatably coupled to a lower end of the rotary lever, and when the connecting bar moves forward during storage, the rotary lever and the rotating member are rotated backward, so that the storage locking hook is separated from the bracket of the horizontal frame of the adjacent passive unit spectator seat, thereby entering a storage unlocked state.

[0015] In the present invention, the withdrawal operation of the retractable spectator seat is sequentially performed by the withdrawal locking unit, and the retractable spectator seat is sequentially performed by the retracting locking unit. Accordingly, the operation of the retractable spectator seat can be performed stably.

[0016] In addition, the present invention can interlock the withdrawal locking unit and the storage locking unit so that the withdrawal locking unit operates by the storage locking unit rather than operating independently. Accordingly, the structure of the locking device can be simplified, thereby reducing damage or malfunction of the locking device, and reducing the manufacturing cost of the locking device.

[0017] In addition, the withdrawal locking portion and the storage locking portion of the present invention can be easily connected and separated from the horizontal frame and the vertical frame. Therefore, malfunctions in the withdrawal locking portion and the storage locking portion can be quickly repaired, and maintenance costs of the locking device can be reduced.

[0018] FIG. 1 is a perspective view showing a locking device of a retractable viewing seat and a continuous arrangement of horizontal and vertical frames according to an embodiment of the present invention.

[0019] Figure 2 is a perspective view of part A shown in Figure 1.

[0020] Figure 3 is a rear perspective view of part A shown in Figure 1.

[0021] Figure 4 is a perspective view of part B shown in Figure 1.

[0022] Figure 5 is a perspective view of part C shown in Figure 1.

[0023] Fig. 6 is a perspective view showing the locking device of the movable unit viewing seat shown in Fig. 1 and the continuous arrangement of the horizontal frame and vertical frame.

[0024] Figure 7 is a perspective view showing a locking device in which the storage operation of the present invention has been completed.

[0025] Fig. 8 is a perspective view showing a portion of the locking device of the present invention after the storage operation is completed.

[0026] Fig. 9 is a perspective view showing a locking device of a retractable viewing seat according to an embodiment of the present invention.

[0027] Figure 10 is an exploded perspective view of Figure 9.

[0028] Figures 11 to 13 are side views showing the operation of the extraction locking part and the storage locking part when the retractable viewing seat is extracted.

[0029] Figures 14 to 16 are side views showing the operation of the pull-out locking part and the storage locking part when the storage-type spectator seat is stored.

[0030] Fig. 17 is a side view showing a state in which a retractable viewing seat is pulled out by the operation of the present invention.

[0031] Fig. 18 is a side view showing a state in which a retractable viewing seat is retracted by the operation of the present invention.

[0032] Hereinafter, the present invention will be described in detail with reference to the attached drawings. The present invention can be modified in various ways and can take various forms, and thus specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, but it should be understood that all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention are included. In describing each drawing, similar reference numerals are used to indicate similar components. In the attached drawings, the dimensions of structures are shown larger than actual size to ensure clarity of the present invention.

[0033] While terms like "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component."

[0034] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0035] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0036] FIG. 1 is a perspective view showing a locking device of a retractable spectator seat and a continuous arrangement of horizontal frames and vertical frames according to an embodiment of the present invention, FIG. 2 is a perspective view of part A shown in FIG. 1, FIG. 3 is a rear perspective view of part A shown in FIG. 1, FIG. 4 is a perspective view of part B shown in FIG. 1, FIG. 5 is a perspective view of part C shown in FIG. 1, FIG. 6 is a perspective view showing a locking device of a movable unit spectator seat and a continuous arrangement of horizontal frames and vertical frames shown in FIG. 1, FIG. 7 is a perspective view showing a locking device of the present invention after the retracting operation is completed, FIG. 8 is a perspective view showing a part of a locking device of the present invention after the retracting operation is completed, FIG. 9 is a perspective view showing a locking device of a retractable spectator seat according to an embodiment of the present invention, FIG. 10 is an exploded perspective view of FIG. 9, and FIGS. 11 to 13 are perspective views showing the retractable spectator seat when pulled out. These are side views showing the operation of the pull-out locking unit and the storage locking unit, and FIGS. 14 to 16 are side views showing the operation of the pull-out locking unit and the storage locking unit when the retractable spectator seat is stored, and FIG. 17 is a side view showing a state in which the retractable spectator seat is stored by the operation of the present invention, and FIG. 18 is a side view showing a state in which the retractable spectator seat is stored by the operation of the present invention.

[0037] Referring to FIGS. 1 to 18, the locking device (10) of the retractable viewing seat is a device that locks or unlocks multiple unit viewing seats (11, 12, 13) in a pulling-out or pulling-out direction, and is safe, has a simple structure, and is easy to operate.

[0038] The general configuration of a retractable viewing stand is to arrange multiple unit viewing seats (11, 12, 13) connected to each other, and each unit viewing seat (11, 12, 13) has multiple wheels (410) on the bottom and is connected to each other to be unfolded and stored forward, a horizontal frame (400), a vertical frame (500) installed vertically to the horizontal frame (400), and an installation plate on the upper surface of the vertical frame (500) on which the viewing chairs of the unit viewing seats are installed.

[0039] Each of the above unit seats (11, 12, 13) is composed of a movable unit seat (11), a fixed unit seat (13), and one or more passive unit seats (12) between the movable unit seat (11) and the fixed unit seat (13).

[0040] The above movable unit spectator seat (11), the at least one passive unit spectator seat (12), and the fixed unit spectator seat (13) are configured in a step shape, and the movable unit spectator seat (11) and the passive unit spectator seat (12) are sequentially pulled out by power or manual operation, and the pulled out movable unit spectator seat (11) and the passive unit spectator seat (12) are stored under the fixed unit spectator seat (13).

[0041] By gradually shortening the length of the vertical frame (500) of each of the above unit seats (11, 12, 13), the height of the installation boards of each unit seat (11, 12, 13) is made different, and at the same time, the gap between the horizontal frames (400) on both sides of each unit seat (11, 12, 13) is also made narrow, so that the horizontal frames (400) on both sides of the upper unit seat are sequentially inserted between the horizontal frames (400) on both sides of the lower unit seat, so that the installation boards can be vertically overlapped.

[0042] When each of the above installation boards is vertically folded, the backrest of the viewing chair on the upper surface of the installation board of each unit viewing seat (11, 12, 13) is folded.

[0043] The above retractable viewing seats are formed by moving the horizontal frame (400) of the movable unit viewing seats (11) forward so that the passive unit viewing seats (22) are spread out in a step-like manner from the fixed unit viewing seats (13). Afterwards, when the backrests of the viewing chairs installed on the upper surface of the installation boards of each unit viewing seat (11, 12, 13) are raised, the seats become actual viewing seats.

[0044] The above horizontal frame (400) moves each of the above unit seats (11, 12, 13) forward and backward.

[0045] Although not shown, a gap maintenance roller may be provided on the side of the horizontal frame (400) to maintain the gap between the horizontal frames (400) and to ensure smooth withdrawal and storage of each unit viewing seat (11, 12, 13).

[0046] The vertical frame (500) is arranged vertically on the upper surface of the horizontal frame (400), and a viewing platform (600) is installed on the upper end of the vertical frame (500). The viewing platform (600) may be installed only on the movable unit viewing seats (11).

[0047] The locking device (10) of the above-mentioned retractable viewing seat comprises a bracket (100), a guide bar (120), a pull-out locking part (200), and a storage locking part (300).

[0048] The above bracket (100) is provided on the upper surface of the front end of the horizontal frame (400), and the inner end protrudes inward to form a protruding end (102), and a bushing (110) is provided at the lower portion of the protruding end (102). The bushing (110) can be fixed to the protruding end (102).

[0049] The guide bar (120) is connected so that the front end is connected to the joining hole (101) of the bracket (100) and the center part slides into the guide hole (111) of the bushing (110) of the adjacent horizontal frame (400), and the rear end is connected to the front of the vertical frame (500).

[0050] The above bracket (100) is connected to the guide bar (120) of the horizontal frame (400) adjacent to the inner side through the bushing (110), so that the horizontal frames (400) can be connected to each other.

[0051] The above bushing (110) prevents wear of the guide bar (120) and ensures smooth sliding operation of the guide bar (120).

[0052] The above-mentioned withdrawal locking part (200) is provided on the bracket (100) of the horizontal frame (400), and makes the horizontal frame (400) of the unit viewing seat (11, 12) locked or unlocked in the withdrawal direction.

[0053] The above-mentioned withdrawal locking part (200) may include a hinge member (210), a withdrawal locking hook (220), and a withdrawal locking release pin (230).

[0054] The above hinge member (210) is hinge-coupled so as to be rotatable about a hinge axis (201) that is horizontally arranged at the upper end of the bracket (100). At this time, the hinge member (210) may be positioned above the front end of the guide bar (120).

[0055] The above-mentioned pull-out lock hook (220) is provided at the rear end of the hinge member (210) and rotates together with the hinge member (210). The pull-out lock hook (220) is caught on the bracket (100) of the adjacent horizontal frame (400), specifically, the protruding end (102), or is separated from the protruding end (102) so that the unit seats (11, 12) are in a pull-out lock state or a pull-out unlock state.

[0056] The above-mentioned withdrawal lock release pin (230) is provided to penetrate the withdrawal lock hook (230) in the horizontal direction and protrude toward the inner side.

[0057] When the above-mentioned withdrawal lock release pin (230) is lifted and the withdrawal lock hook (220) and the hinge member (210) are rotated forward, the withdrawal lock hook (220) is separated from the bracket (100) of the adjacent horizontal frame (400) and enters the withdrawal lock release state.

[0058] At this time, the above-mentioned withdrawal lock release pin (230) can be lifted by the above-mentioned storage locking part (300).

[0059] When the force for lifting the above-mentioned pull-out lock release pin (230) is removed, the pull-out lock release pin (230), the pull-out lock hook (220), and the hinge member (210) rotate backwards due to the weight of the pull-out locking part (200), and the pull-out lock hook (220) is caught on the bracket (100) of the adjacent horizontal frame (400), thereby entering the pull-out lock state.

[0060] The above storage locking part (300) is provided on one side of the vertical frame (500) and can make the horizontal frame (400) locked or unlocked in the storage direction.

[0061] Specifically, the storage locking part (300) may include a rotating member (310), a storage locking hook (320), and an operating bar (330).

[0062] The above-mentioned rotating member (310) is provided on the outer surface of the vertical frame (500) and is rotatably coupled to a rotating shaft (301) disposed transversely penetrating the vertical frame (500).

[0063] The above storage lock hook (320) is provided at the front end of the above rotating member (310) and can be caught on the bracket (100) of the adjacent horizontal frame (400), specifically, the protruding end (102), or separated from the protruding end (102) so that the unit seats (11, 12) can be in a storage lock state or a storage unlock state.

[0064] The above operating bar (330) may be provided to be inclined upward toward the front from the above rotating member (310).

[0065] When the horizontal bar (610) at the rear end of the above-mentioned viewing platform (600) moves backwards and pushes the operating bar (330) to rotate it backwards, the storage lock hook (320) is separated from the bracket (100) of the adjacent horizontal frame (400) and enters the storage unlocked state.

[0066] When the horizontal bar (610) at the rear end of the above-mentioned viewing platform (600) moves forward and separates from the operating bar (330), the operating bar (330) rotates forward, and the storage lock hook (320) can be caught on the bracket (100) of the adjacent horizontal frame (400) to enter the storage lock state.

[0067] Meanwhile, a rotation angle limiting groove (311) may be provided on the above-mentioned rotating member (310), and a protruding pin (510) fitted into the rotation angle limiting groove (311) may be provided on the outer surface of the above-mentioned vertical frame (500).

[0068] When the above-mentioned rotating member (310) descends while rotating, the above-mentioned protruding pin (510) is caught on the upper end of the rotation angle limiting groove (311), and when the above-mentioned rotating member (310) rises while rotating, the above-mentioned protruding pin (510) is caught on the lower end of the rotation angle limiting groove (311). Therefore, the rotation angle of the above-mentioned rotating member (310) can be limited.

[0069] Since the rotation angle of the above-mentioned rotating member (310) can be limited, the rotation angle of the above-mentioned storage lock hook (320) can be limited.

[0070] The above storage locking part (300) can operate the above withdrawal locking part (200) by moving the above withdrawal lock release pin (230).

[0071] Referring to FIGS. 11 to 13, when the storage locking part (300) moves forward during withdrawal, the storage locking hook (320) rises along the protrusion (102) of the bracket (100) of the adjacent horizontal frame (400) and lifts the withdrawal lock release pin (230) of the adjacent horizontal frame (400).

[0072] When the above-mentioned withdrawal lock release pin (230) is lifted and the withdrawal lock hook (220) and the hinge member (210) are rotated forward, the withdrawal lock hook (220) is separated from the bracket (100) of the adjacent horizontal frame (400) and enters the withdrawal lock release state.

[0073] Thereafter, since the storage lock hook (320) maintains the state in which the withdrawal lock release pin (230) is lifted, the withdrawal lock hook (220) maintains the withdrawal lock release state separated from the bracket (100) of the adjacent horizontal frame (400).

[0074] At this time, when the storage locking part (300) moves forward further, the storage locking hook (320) rises along the protruding end (102) of the bracket (100) of the adjacent horizontal frame (400), and when it reaches the end of the protruding end (102), it is caught on the end of the bracket (100), that is, the end of the protruding end (102), thereby entering a storage locking state.

[0075] Referring to FIGS. 14 to 16, when the horizontal bar (610) of the viewing platform (600) moves backwards to push the operating bar (330) of the storage locking part (300) and rotate it backwards, the storage locking hook (320) rises and separates from the protruding end (102) of the bracket (100) of the adjacent horizontal frame (400) to enter the storage unlocked state.

[0076] At this time, since the storage lock hook (320) maintains the state in which the withdrawal lock release pin (230) is lifted, the withdrawal lock hook (220) maintains the withdrawal lock release state separated from the bracket (100) of the adjacent horizontal frame (400).

[0077] Thereafter, when the horizontal bar (610) moves further backward, the storage lock hook (320) is separated from the protrusion (102) of the bracket (100) of the adjacent horizontal frame (400), and the force for lifting the withdrawal lock release pin (230) is removed.

[0078] When the force for lifting the above-mentioned pull-out lock release pin (230) is removed, the pull-out lock release pin (230), the pull-out lock hook (220), and the hinge member (210) rotate backwards due to the weight of the pull-out locking part (200), and the pull-out lock hook (220) is caught on the bracket (100) of the adjacent horizontal frame (400), thereby entering the pull-out lock state.

[0079] Meanwhile, the horizontal frame (400) and vertical frame (500) of the passive unit viewing seat (12) may be provided with the bracket (100), the guide bar (120), the pull-out locking part (200), and the storage locking part (300).

[0080] The horizontal frame (400) and vertical frame (500) of the above-mentioned movable unit viewing seat (11) may be provided with the bracket (100), the guide bar (120), the storage locking part (300), and the viewing seat level (600).

[0081] At this time, the storage locking part (300) of the movable unit viewing seat (11) may include the rotating member (310) and the storage locking hook (320) excluding the operating bar (330).

[0082] Since the above-mentioned viewing platform (600) is fixed to the vertical frame (500) of the above-mentioned movable unit viewing seat (11), even if the storage locking part (300) of the above-mentioned movable unit viewing seat (11) includes the above-mentioned operating bar (330), the above-mentioned horizontal bar (610) cannot push the above-mentioned operating bar (330). Therefore, the above-mentioned operating bar (330) is unnecessary.

[0083] Meanwhile, the storage locking part (300) of the above-mentioned movable unit viewing seat (11) may further include a rotation lever (340) and a connecting bar (350).

[0084] The above-mentioned rotary lever (340) is provided on the inner surface of the above-mentioned vertical frame (500), and the upper part is coupled to rotate together with the above-mentioned rotary shaft (301).

[0085] The above connecting bar (350) is rotatably connected to the lower portion of the above rotating lever (340) and can extend forward.

[0086] When the connecting bar (350) moves forward during storage and the rotating lever (340) and the rotating member (310) are rotated backward, the storage lock hook (320) can be separated from the bracket (100) of the horizontal frame (400) of the adjacent passive unit viewing seat (12) to enter the storage unlocked state.

[0087] The operation of the storage locking part (300) during withdrawal is substantially the same as the operation of other storage locking parts (300).

[0088]

[0089] The operation and effect of the above locking device (10) are described in detail as follows.

[0090] First, when the retractable seats are pulled out, the movable unit seats (11) forming the front row are moved forward. At this time, the passive unit seats (12) except for the movable unit seats (11) are locked to each other by the pull-out locking part (200) and cannot move. This is because the pull-out locking hook (220) of the pull-out locking part (200) of the passive unit seats (12) is caught on the bracket (100), specifically the protrusion (102), of the adjacent passive unit seats (12) or the fixed unit seats (13) and is thus in a locked state. In other words, since the passive unit seats (12) and the fixed unit seats (13) are locked by the pull-out locking part (200), only the movable unit seats (11) move. The above fixed unit viewing seats (13) are fixed and cannot be moved.

[0091] At this time, when moving the above unit seats (11, 12) forward or backward, they can be moved manually or electrically using a known extraction device. In addition, the connecting bar (350) of the above movable unit seats (11) can also be moved forward manually or electrically.

[0092] When the above movable unit spectator seat (11) is moved forward, the storage lock hook (320) of the movable unit spectator seat (11) lifts the pull-out lock release pin (230) of the passive unit spectator seat (12) adjacent to the outside, and as the pull-out lock release pin (230) is lifted, the pull-out lock hook (220) is separated from the bracket (100) of the other passive unit spectator seat (12) adjacent to the outside, so that the passive unit spectator seat (12) enters the pull-out unlock state. Accordingly, the passive unit spectator seat (12) moves forward together with the movable unit spectator seat (11).

[0093] Meanwhile, when the storage lock hook (320) of the movable unit viewing seat (11) moves forward while lifting the pull-out lock release pin (230) of the passive unit viewing seat (12) adjacent to the outside, the storage lock hook (320) descends due to its own weight and is caught on the bracket (100) of the horizontal frame (400) adjacent to the outside, thereby entering the storage lock state.

[0094] The above process is sequentially performed in the same manner for the passive unit seats (12) positioned on the outer side of the retractable seats. Accordingly, the locking device (10) is in the withdrawn state as shown in Fig. 17.

[0095] When the above-mentioned retractable seats are retracted, the movable unit seats (11) located in the front row are moved rearward. At this time, the movable unit seats (11) and the passive unit seats (12) are locked to each other by the retractable locking part (300) and cannot be moved. This is because the retractable locking hook (320) of the retractable locking part (300) of the movable unit seats (11) or the passive unit seats (12) is caught on the front end of the bracket (100) of the adjacent passive unit seats (12) or the fixed unit seats (13), specifically, the front end of the protruding part (102), and is thus locked. In other words, the movable unit seats (11) and the passive unit seats (12) are locked by the retractable locking part (300) and therefore cannot be moved. The fixed unit seats (13) are fixed and therefore cannot be moved.

[0096] First, when the connecting bar (350) of the movable unit viewing seat (11) is moved forward, the rotating lever (340) and the rotating member (310) rotate backward, and the storage lock hook (320) is separated from the bracket (100) of the passive unit viewing seat (12) adjacent to the outside, so that the movable unit viewing seat (11) is in a storage unlocked state.

[0097] Thereafter, when the movable unit spectator seat (11) is moved rearward, the crossbar (610) installed at the rear end of the spectator seat stage (600) of the movable unit spectator seat (11) contacts and presses the operating bar (330) of the storage locking part (300) of the passive unit spectator seat (12) adjacent to the outside, so that the storage locking hook (320) of the storage locking part (300) of the passive unit spectator seat (12) is separated from the front end of the bracket (100) of the other passive unit spectator seat (12) on the outside, and the passive unit spectator seat (12) is unlocked. Accordingly, the passive unit spectator seat (12) moves rearward together with the movable unit spectator seat (11).

[0098] Meanwhile, when the movable unit viewing seat (11) moves further rearward, the storage lock hook (320) of the movable unit viewing seat (11) is separated from the protrusion (102) of the bracket (100) of the passive unit viewing seat (12) adjacent to the outside, and the force for lifting the pull-out lock release pin (230) of the passive unit viewing seat (12) is removed.

[0099] When the force for lifting the pull-out lock release pin (230) of the passive unit spectator seat (12) is removed, the pull-out lock release pin (230), the pull-out lock hook (220) and the hinge member (210) rotate backwards due to the weight of the pull-out locking part (200) of the passive unit spectator seat (12), and the pull-out lock hook (220) is caught on the bracket (100) of another adjacent passive unit spectator seat (12), thereby entering a pull-out lock state.

[0100] The above process is sequentially performed in the same manner for the passive unit seats (12) and the fixed unit seats (13) arranged on the outer side of the retractable seats. Accordingly, the locking device (10) is in a retracted state as shown in Fig. 18.

[0101] As described above, the present invention sequentially performs the withdrawal operation of the retractable spectator seat by the withdrawal locking unit (200), and sequentially performs the storage operation of the retractable spectator seat by the storage locking unit (300). Accordingly, the operation of the retractable spectator seat can be performed stably.

[0102] In addition, the present invention can link the withdrawal locking unit (200) and the storage locking unit (300) so that the withdrawal locking unit (300) is operated by the storage locking unit (300) rather than operating separately. Accordingly, the structure of the locking device (10) can be simplified, thereby reducing damage or malfunction of the locking device (10), and reducing the manufacturing cost of the locking device (10).

[0103] In addition, the withdrawal locking part (200) and the storage locking part (300) of the present invention can be easily coupled to and separated from the horizontal frame (400) and the vertical frame (500). Therefore, a failure of the withdrawal locking part (200) and the storage locking part (300) can be quickly repaired, and the maintenance cost of the locking device (10) can be reduced.

[0104] The locking device of the retractable viewing stand according to the present invention can simplify its structure. Accordingly, damage or malfunction of the locking device can be reduced, and the manufacturing cost of the locking device can be reduced.

[0105] In addition, the locking device can easily couple and separate the withdrawal locking portion and the storage locking portion from the horizontal frame and the vertical frame. Accordingly, malfunctions in the withdrawal locking portion and the storage locking portion can be quickly repaired, and maintenance costs for the locking device can be reduced.

[0106]

[0107] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

1. In a locking device for a retractable viewing seat, a horizontal frame that moves the unit viewing seat forward and backward and a vertical frame that is vertically erected and arranged on the upper surface of the horizontal frame are installed, A bracket provided on the upper surface of the front end of the horizontal frame, having an inner end protruding inwardly and having a bushing installed on the protruding end; The front end is connected to the bracket, the center end is slidably connected to the bushing of the adjacent horizontal frame, and the rear end is connected to the vertical frame as a guide bar; and It includes a pull-out locking part which is provided on the above bracket and makes the horizontal frame in a locking or unlocking state in the pull-out direction; The above withdrawal locking part is, A hinge member that is hinge-joined to be rotatable around a hinge axis that is transversely arranged at the upper end of the bracket; A pull-out lock hook provided at the rear end of the hinge member and hooked to or separated from a bracket of an adjacent horizontal frame to allow the unit seats to be pulled out or unlocked; and It includes a pull-out lock release pin which is provided to protrude inwardly by penetrating the pull-out lock hook in the horizontal direction; A locking device for a retractable viewing seat, characterized in that when the above-mentioned withdrawal lock release pin is lifted and the above-mentioned withdrawal lock hook is rotated forward, the above-mentioned withdrawal lock hook is separated from the bracket of the adjacent horizontal frame and enters the withdrawal lock release state.

2. In paragraph 1, It further includes a storage locking part provided on one side of the vertical frame and locking or unlocking the horizontal frame in the storage direction; A locking device for a retractable viewing seat, characterized in that the above-mentioned storage locking part moves the above-mentioned withdrawal lock release pin.

3. In paragraph 2, The above storage locking part is, A rotating member provided on the outer surface of the vertical frame and connected to a rotating shaft that is arranged to penetrate the vertical frame in a transverse direction so as to be rotatable; A storage lock hook provided at the front end of the above-mentioned rotating member and hooked to or separated from the bracket of an adjacent horizontal frame so that the unit seats are in a storage locking state or a storage unlocking state; and It includes an operating bar which is provided to be inclined upward toward the front from the above rotating member; A locking device for a retractable spectator seat, characterized in that when the horizontal bar at the rear end of the spectator seat provided on the upper part of the vertical frame is retracted and the operating bar is pushed to rotate backward, the retractable locking hook is separated from the bracket of the adjacent horizontal frame, and the retractable locking state is released.

4. In paragraph 3, A locking device for a retractable viewing seat, characterized in that when the retractable locking part is moved forward, the retractable locking release pin of an adjacent horizontal frame is lifted.

5. In paragraph 3, A rotation angle limiting groove is provided on the above rotating member, The outer surface of the above vertical frame is provided with a protruding pin that fits into the above rotation angle limiting groove, A locking device for a retractable viewing seat, characterized in that the rotation angle of the retractable locking hook is limited by the above-mentioned rotating member being caught on the above-mentioned protruding pin.

6. In paragraph 3, The above unit seats are composed of movable unit seats, fixed unit seats, and one or more passive unit seats between the movable unit seats and the fixed unit seats. The horizontal frame and vertical frame of the above-mentioned passive unit viewing seat are provided with the above-mentioned bracket, the above-mentioned guide bar, the above-mentioned withdrawal locking part, and the above-mentioned storage locking part. The horizontal frame and vertical frame of the above movable unit viewing seat are provided with the bracket, the guide bar, the storage locking part, and the viewing seat level. A locking device for a retractable viewing seat, characterized in that the horizontal frame and vertical frame of the fixed unit viewing seat are provided with the bracket.

7. In paragraph 6, The storage locking section of the above movable unit viewing seat is, A locking device for a retractable viewing seat, characterized by including the rotating member excluding the operating bar and the retractable locking hook.

8. In paragraph 7, The storage locking section of the above movable unit viewing seat is, A rotary lever provided on the inner surface of the vertical frame and coupled so that the upper part rotates together with the rotation axis; and It further includes a connecting bar that is rotatably connected to the lower part of the above-mentioned rotary lever and extends forward; A locking device for a retractable viewing seat, characterized in that when the connecting bar moves forward during storage and the rotating lever and the rotating member are rotated backward, the retractable locking hook is separated from the bracket of the horizontal frame of the adjacent passive unit viewing seat, thereby entering a retractable unlocked state.

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