Auxiliary closing device of staircase fireproof door

Abstract

The utility model relates to an auxiliary closing device of a staircase fireproof door, and relates to the field of fireproof doors. The device comprises an inserting hole formed in the right side of an inner cavity of a door frame and a fixing box fixedly installed on a door body, the door body is hinged to the left side of the inner cavity of the door frame, an inner cavity of the fixing box is slidably connected with a rack, and the right side of the rack is fixedly connected with a bolt. When the door body is closed, the operating rod is pulled leftwards to drive the sector gear to rotate anticlockwise on the surface of the shaft pin, the sector gear is meshed with the rack, so that the rack moves rightwards, the rack drives the bolt to be inserted into the inner cavity of the insertion hole, and auxiliary locking is achieved; during the period, the lock pin on the operating rod moves to the inner cavity of the lock groove, the state of the operating rod at the moment is locked, a bolt structure can be arranged at the position below the door, the lower portion of the door is tightly closed in an auxiliary mode in a manual mode, and deformation of the lower portion of the door due to too large pressure is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fireproof doors, in particular to a stairwell fireproof door auxiliary closing device. BACKGROUND

[0002] The fireproof door refers to the door that can meet the requirements of fire resistance stability, integrity and heat insulation within a certain time, and it is a fire-resistant partition set between fire compartments, evacuation stairwells, vertical shafts and the like.

[0003] In the process of closing the fireproof door, generally only the door lock on the fireproof door is relied on, and the electric door closer on the fireproof door is generally installed above the fireproof door to assist in closing the upper part of the fireproof door. The position below the door lacks an auxiliary closing device, and the position below the door is prone to deformation when subjected to pressure. Therefore, the present application provides a stairwell fireproof door auxiliary closing device which sets a bolt structure at the position below the door to manually assist in closing the position below the door and prevent the position below the door from deforming due to excessive pressure. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the existing technical problems, the present application provides a stairwell fireproof door auxiliary closing device.

[0005] The stairwell fireproof door auxiliary closing device provided by the present application adopts the following technical scheme: a stairwell fireproof door auxiliary closing device, comprising a socket opening in the right side of the inner cavity of a door frame and a fixed box fixedly installed on a door body, the door body being hingedly connected to the left side of the inner cavity of the door frame, the inner cavity of the fixed box being slidably connected with a rack, the right side of the rack being fixedly connected with a bolt, the right end of the bolt extending to the outside of the fixed box and extending to the inner cavity of the socket, the inner cavity of the fixed box being fixedly connected with a shaft pin, the surface of the shaft pin being rotatably connected with a sector gear, the sector gear being engaged with the rack, the sector gear being fixedly connected with an operating rod extending to the outside of the fixed box, and a locking assembly being arranged between the operating rod and the fixed box.

[0006] By adopting the above technical scheme, when the door body is closed, the operating rod is further moved to the left to drive the sector gear to rotate counterclockwise on the surface of the shaft pin, the sector gear and the rack are in engagement, the rack moves to the right, and the rack drives the bolt to insert into the inner cavity of the socket to achieve auxiliary locking. During this period, the locking pin on the operating rod moves to the inner cavity of the locking groove, and the state of the operating rod is locked. Thus, the bolt structure is arranged at the position below the door to manually assist in closing the position below the door and prevent the position below the door from deforming due to excessive pressure.

[0007] Preferably, the locking assembly comprises an arc-shaped strip fixedly connected to the top of the fixed box, a sliding groove is opened in the arc-shaped strip, locking grooves are opened at both ends of the inner cavity of the sliding groove, a cavity is opened in the operating rod, a locking pin is slidably connected in the inner cavity of the cavity, and the locking pin is adapted to the sliding groove and the locking groove.

[0008] Preferably, the inner cavity of the cavity is provided with a spring, the top of the spring is fixedly connected with the inner wall of the cavity, and the bottom of the spring is fixedly connected with the locking pin.

[0009] Preferably, the end of the surface of the operating rod is sleeved with a rubber sleeve, and the surface of the rubber sleeve is provided with anti-skid lines.

[0010] By adopting the above technical scheme, the comfort of the user when holding the operating rod is improved, and the user can conveniently operate the operating rod.

[0011] Preferably, the top of the fixed box is provided with a moving opening for the movement of the operating rod.

[0012] Preferably, the inner cavity of the fixed box is fixedly connected with two symmetrical guide rods, and the rack is slidingly connected to the surfaces of the two guide rods.

[0013] By adopting the above technical scheme, the movement of the rack can be guided and supported through the guide rods, and the stability of the movement of the rack on the surfaces of the guide rods is improved.

[0014] In summary, the present application has at least one of the following beneficial technical effects:

[0015] 1. When the door body is closed, the operating rod is moved to the left to drive the sector gear to rotate counterclockwise on the surface of the shaft pin, the sector gear and the rack are in meshing state, the rack moves to the right, the rack drives the bolt to insert into the inner cavity of the insertion hole, auxiliary locking is realized, the locking pin on the operating rod moves to the inner cavity of the locking groove, and the state of the operating rod is locked.

[0016] 2. The movement of the rack can be guided and supported through the guide rods, and the stability of the movement of the rack on the surfaces of the guide rods is improved.

[0017] 3. The comfort of the user when holding the operating rod is improved through the setting of the rubber sleeve, and the user can conveniently operate the operating rod. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present application, so that other features, objects and advantages of the present application become more apparent. The illustrative embodiment drawings of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 is a structural perspective view of the present application.

[0020] Figure 2 is the utility model structure Figure 1 Amplification schematic view of point in the utility model.

[0021] Figure 3 is the utility model fixed box's three-dimensional section view schematic view.

[0022] Figure 4 is the utility model operating lever and lock pin's three-dimensional split schematic view.

[0023] Mark explanation: 1, door frame;2, door body;3, jack;4, fixed box;5, rack;6, bolt;7, axle pin;8, sector gear;9, operating lever;10, locking assembly;101, arc strip;102, sliding slot;103, lock slot;104, cavity;105, lock pin;106, spring;11, rubber sleeve;12, movable mouth;13, guide rod. DETAILED DESCRIPTION

[0024] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "in", "out", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0028] In addition, the term "multiple" should mean two or more.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example 1:

[0031] Combination Figures 1-4 This application discloses an auxiliary closing device for a fire door in a stairwell. The auxiliary closing device includes an insertion hole 3 on the right side of the inner cavity of a door frame 1 and a fixing box 4 fixedly installed on the door body 2. The door body 2 is hinged to the left side of the inner cavity of the door frame 1. A rack 5 is slidably connected to the inner cavity of the fixing box 4. A pin 6 is fixedly connected to the right side of the rack 5. The right end of the pin 6 extends through the outside of the fixing box 4 and into the inner cavity of the insertion hole 3. A shaft pin 7 is fixedly connected to the inner cavity of the fixing box 4. A sector gear 8 is rotatably connected to the surface of the shaft pin 7. The sector gear 8 meshes with the rack 5. An operating rod extending through the outside of the fixing box 4 is fixedly connected to the sector gear 8. 9. A rubber sleeve 11 is fitted onto the end of the surface of the operating lever 9. The surface of the rubber sleeve 11 is provided with anti-slip texture. The rubber sleeve 11 can increase the comfort of the user when holding the operating lever 9 and facilitate the user's operation of the operating lever 9. The top of the fixed box 4 is provided with an opening 12 for the operating lever 9 to move. Two symmetrical guide rods 13 are fixedly connected to the inner cavity of the fixed box 4. The rack 5 is slidably connected to the surface of the two guide rods 13. The guide rods 13 can guide and support the movement of the rack 5, and improve the stability of the rack 5 moving on the surface of the guide rods 13. A locking component 10 is provided between the operating lever 9 and the fixed box 4.

[0032] Example 2:

[0033] Combination Figures 1-4 The locking assembly 10 includes an arc-shaped strip 101 fixedly connected to the top of the fixed box 4. A groove 102 is provided on the arc-shaped strip 101. Locking grooves 103 are provided at both ends of the inner cavity of the groove 102. A cavity 104 is provided on the operating rod 9. A locking pin 105 is slidably connected to the inner cavity of the cavity 104. The locking pin 105 is adapted to the groove 102 and the locking groove 103. A spring 106 is provided in the inner cavity of the cavity 104. The top of the spring 106 is fixedly connected to the inner wall of the cavity 104, and the bottom of the spring 106 is fixedly connected to the locking pin 105.

[0034] Working principle: when the utility model is used, the door body 2 is in the closed state, the user pushes the lock pin 105 upwards, so that the lock pin 105 is separated from the inner cavity of the right end lock groove 103 and is located in the inner cavity of the sliding groove 102, at this time the spring 106 is in the stress extrusion state, then the rubber sleeve 11 is moved to the left to drive the operating rod 9 and the sector gear 8 to rotate counterclockwise with the shaft pin 7 as the shaft, the operating rod 9 drives the lock pin 105 to slide in the inner cavity of the sliding groove 102, until the lock pin 105 moves to the left end of the inner cavity of the sliding groove 102, the restoring force of the spring 106 makes the lock pin 105 be clamped in the inner cavity of the lock groove 103, the process of the operating rod 9 rotating to the left makes the sector gear 8 drive the rack 5 to move to the right, the rack 5 drives the bolt 6 to insert into the inner cavity of the insertion hole 3, and the lower part of the door body 2 is achieved.

[0035] In summary: the auxiliary closing device of the stairway fire door, when the door body 2 is closed, the operating rod 9 is moved to the left to drive the sector gear 8 to rotate counterclockwise on the surface of the shaft pin 7, the sector gear 8 and the rack 5 are in the meshing state, so that the rack 5 moves to the right, the rack 5 drives the bolt 6 to insert into the inner cavity of the insertion hole 3, and the auxiliary locking is achieved, during which the lock pin 105 on the operating rod 9 moves to the inner cavity of the lock groove 103, and the state of the operating rod 9 is locked, so that the bolt structure is arranged at the position below the door, and the door below is manually closed and assisted, so that the deformation of the door below due to excessive pressure is prevented.

[0036] The above only describes the preferred embodiments of the application and is not used to limit the application, and the application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. An auxiliary closing device for a fire door in a stairwell, characterized in that: The device includes an insertion hole (3) on the right side of the inner cavity of the door frame (1) and a fixing box (4) fixedly installed on the door body (2). The door body (2) is hinged to the left side of the inner cavity of the door frame (1). A rack (5) is slidably connected to the inner cavity of the fixing box (4). A pin (6) is fixedly connected to the right side of the rack (5). The right end of the pin (6) passes through to the outside of the fixing box (4) and extends to the inner cavity of the insertion hole (3). A shaft pin (7) is fixedly connected to the inner cavity of the fixing box (4). A sector gear (8) is rotatably connected to the surface of the shaft pin (7). The sector gear (8) meshes with the rack (5). An operating rod (9) is fixedly connected to the sector gear (8) and extends through to the outside of the fixing box (4). A locking assembly (10) is provided between the operating rod (9) and the fixing box (4).

2. The auxiliary closing device for a fire door in a stairwell according to claim 1, characterized in that: The locking assembly (10) includes an arc-shaped strip (101) fixedly connected to the top of the fixed box (4). A sliding groove (102) is provided on the arc-shaped strip (101). Locking grooves (103) are provided at both ends of the inner cavity of the sliding groove (102). A cavity (104) is provided on the operating rod (9). A locking pin (105) is slidably connected to the inner cavity of the cavity (104). The locking pin (105) is adapted to the sliding groove (102) and the locking groove (103).

3. The auxiliary closing device for a fire door in a stairwell according to claim 2, characterized in that: The cavity (104) is provided with a spring (106), the top of the spring (106) is fixedly connected to the inner wall of the cavity (104), and the bottom of the spring (106) is fixedly connected to a locking pin (105).

4. The auxiliary closing device for a fire door in a stairwell according to claim 3, characterized in that: The end of the operating lever (9) is fitted with a rubber sleeve (11), and the surface of the rubber sleeve (11) is provided with anti-slip texture.

5. The auxiliary closing device for a fire door in a stairwell according to claim 4, characterized in that: The top of the fixed box (4) is provided with an opening (12) for the operation lever (9) to move.

6. The auxiliary closing device for a fire door in a stairwell according to claim 5, characterized in that: The inner cavity of the fixed box (4) is fixedly connected to two symmetrical guide rods (13), and the rack (5) is slidably connected to the surface of the two guide rods (13).

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