Novel positioning and releasing mechanism for door closer of normally-open type fireproof door

Abstract

The utility model belongs to the technical field of fireproof doors and windows, and provides a novel normally-open type fireproof door closer positioning and releasing mechanism which comprises a hollow shell, a sliding rail, a base, a sliding block, a limiting mechanism, a shifting fork and a control unit, a groove is formed in the lower surface of the sliding block, and a connecting column is arranged on the upper surface of the sliding block; the limiting mechanism comprises two side plates correspondingly arranged in a spaced mode and a horizontal plate fixedly connected with the two side plates, the length of the horizontal plate is smaller than that of the side plates, the horizontal plate is flush with the left ends of the two side plates, the right end of the horizontal plate and the right ends of the two side plates define a first notch, and an arc-shaped elastic spring bolt buckle is arranged at the end, close to the first notch, of the horizontal plate in the width direction. One end of the spring bolt buckle is fixedly connected with the horizontal plate, and the other end of the spring bolt buckle is arranged over the first notch in a suspended mode. The limiting mechanism is arranged to comprise the two side plates correspondingly arranged at intervals, the horizontal plate arranged between the two side plates and the arc-shaped elastic spring bolt buckle, so that the limiting mechanism is simple in structure, low in production cost and high in cost performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of fireproof doors and windows, and particularly relates to a novel positioning and releasing mechanism for a normally open fireproof door closer. Background Art

[0002] In the existing fire protection field, under normal conditions, the built-in limit mechanism of the normally open fire door electric door closer is effective, so that the fire door remains normally open to facilitate people to pass; when an emergency such as a fire occurs, the communication module of the fire door electric door closer receives the door closing signal from the system host, making the limit mechanism invalid and the fire door automatically closes, thereby isolating the fire source, preventing the spread of fire and smoke, and protecting people and objects.

[0003] The door closer of a normally open fire door includes a connecting arm, a door closer body and a slide rail device. The door closer body is installed on the door body, and the slide rail device is installed on the door frame. The two are rotatably connected through the connecting arm. A limiting mechanism is provided on the slide rail device, and a slider is provided on the connecting arm. The slider slides on the slide rail of the slide rail device to enable the door to be opened or closed. After the slider is locked with the limiting mechanism, the connecting arm can fix the door at an angle.

[0004] However, the existing limit mechanism has a complex structure and numerous parts, which leads to high cost, complex process, low cost performance and other problems of fire door closers. Therefore, a new type of normally open fire door closer positioning and release mechanism is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a novel positioning and releasing mechanism for a normally open fire door closer.

[0006] The utility model is implemented in this way. A novel positioning and releasing mechanism for a normally open fire door closer comprises: a long strip hollow shell with an opening at the upper end, two parallel and spaced slide rails fixedly arranged at the opening of the hollow shell, a base fixedly arranged in the hollow shell, a slider slidably arranged on the two slide rails, a limiting mechanism fixedly arranged on the base, a shift fork hinged at the middle of the base and buckled with the limiting mechanism, and a control unit fixedly arranged on the base, a groove is provided on the lower surface of the slider, and a connecting column is fixedly arranged in the middle of the upper surface of the slider. The connecting column is used to connect with the connecting arm on the fire door; the limiting mechanism includes two side panels arranged at corresponding intervals and a horizontal plate fixedly connected to the two side panels, the length of the horizontal plate is smaller than the length of the side plate, the horizontal plate is flush with the left ends of the two side panels, the right end of the horizontal plate and the right ends of the two side panels enclose a first notch, an arc-shaped elastic lock tongue buckle is provided at one end of the horizontal plate close to the first notch in the width direction, one end of the lock tongue buckle is fixedly connected to the horizontal plate, and the other end of the lock tongue buckle is suspended directly above the first notch.

[0007] Specifically, a first inclined guide surface is provided at the left end of the lower surface of the slider, a second guide surface cooperating with the first guide surface is provided on the right side of the locking tongue buckle, and resistance stripes are provided on the left arc surface of the locking tongue buckle.

[0008] Furthermore, the arc surface on the left side of the locking tongue buckle is stepped.

[0009] Specifically, a threaded through hole is provided above the groove near the first guide surface, a screw is passed through the threaded through hole, and the screw is used to adjust the resistance between the slider and the locking tongue buckle.

[0010] Specifically, a second notch is provided in the middle of the other end in the width direction of the horizontal plate, and a limiting groove recessed to the left is provided on the right side of the shift fork, and the limiting groove and the second notch are engaged with each other.

[0011] Specifically, the base includes a pedestal and a frame body connected to the pedestal, and a card block and a first card slot that are snap-connected to each other are respectively provided on the pedestal and the frame body.

[0012] Furthermore, the limiting mechanism is fixedly arranged at the right end of the base, the control unit is fixedly arranged at the left end of the base, first through holes are arranged on the baffles on both sides of the right end of the base, a gantry beam is arranged in the middle of the right end of the base, a second through hole is arranged in the middle of the limiting mechanism, and the middle of the limiting mechanism is arranged directly below the gantry beam. The limiting mechanism is positioned in the base accommodating groove by a fixing pin, and the fixing pin passes through the first through hole and the second through hole on the side baffle of the base in sequence.

[0013] Furthermore, the control unit includes a permanent magnet electromagnetic unit arranged in the base, a clamping shaft arranged at the end of the permanent magnet electromagnetic unit and axially movable, and an elastic body sleeved on the clamping shaft and enabling the clamping shaft to axially extend and retract, the end of the clamping shaft has a second clamping groove, the shift fork includes a clamping column clamped with the second clamping groove and a shifting member arranged on the top of the clamping column, and the shift fork is positioned in the base accommodating groove through a fixing column.

[0014] Specifically, the circuit board is electrically connected to a monitoring system disposed outside the hollow shell.

[0015] The door closer positioning and releasing mechanism provided by the utility model has a simple structure of the limit mechanism by configuring the limit mechanism to include two side plates correspondingly arranged at intervals, a horizontal plate arranged between the two side plates, and a structure of an arc-shaped elastic lock tongue buckle. The elasticity of the arc-shaped elastic lock tongue buckle is utilized, and there is no need to add accessories such as springs. Only one elastic sheet is needed in the structure to replace the lock tongue, spring, connecting rod and other structures in the prior art, and the production cost is low, the structure is simple, and the cost performance is high. At the same time, an adjusting screw is arranged on the slider, and the locking force between the limit mechanism and the slider is adjusted by adjusting the screw, so that the locking performance of the fire door is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is an overall schematic diagram of a new normally open fire door closer provided by implementation 1 of the utility model;

[0018] Figure 2 It is an overall cross-sectional view of a novel normally open fire door closer mechanism provided by an embodiment of the utility model;

[0019] Figure 3 It is an exploded diagram of a positioning and releasing mechanism for a new normally open fire door closer provided by an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of a slider in a positioning and releasing mechanism of a new normally open fire door closer provided by an embodiment of the utility model;

[0021] Figure 5 It is a cross-sectional schematic diagram of the positioning and locking of the positioning and releasing mechanism of the new normally open fire door closer provided by the embodiment of the utility model;

[0022] Figure 6It is a release cross-sectional schematic diagram of a positioning and release mechanism of a new normally open fire door closer provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0027] Reference Figure 1-3The present application provides a novel positioning and releasing mechanism for a normally open fire door closer, comprising: a long hollow shell 1 with an opening at the upper end, two parallel and spaced slide rails 11 fixed at the opening of the hollow shell 1, a base 2 fixed in the hollow shell 1, a slider 3 slidably mounted on the two slide rails 11, a limiting mechanism 4 fixed on the base 2, a fork 5 hinged at the middle of the base 2 and buckled with the limiting mechanism 4, and a control unit 6 fixed on the base 2, a groove 31 is provided on the lower surface of the slider 3, a connecting column 32 is fixed on the middle of the upper surface of the slider 3, and the connecting column 32 is used to connect with the connecting arm on the fire door; the limiting mechanism 4 includes two side panels 41 arranged at corresponding intervals and a horizontal plate 42 fixedly connected to the two side panels 41, the length of the horizontal plate 42 is less than the length of the side panel 41, the horizontal plate 42 is flush with the left ends of the two side panels 41, the right end of the horizontal plate 42 and the right ends of the two side panels 41 enclose a first notch 43, and an arc-shaped elastic lock tongue buckle 44 is provided at one end of the horizontal plate 42 close to the first notch 43 in the width direction, one end of the lock tongue buckle 44 is fixedly connected to the horizontal plate 42, and the other end of the lock tongue buckle 44 is suspended directly above the first notch 43.

[0028] The novel normally open fire door closer positioning and releasing mechanism provided by the utility model has a simple structure of the limiting mechanism 4 by configuring the limiting mechanism 4 to include two side plates 41 correspondingly arranged at intervals, a horizontal plate 42 arranged between the two side plates 41, and an arc-shaped elastic lock tongue buckle 44. The elasticity of the arc-shaped elastic lock tongue buckle 44 is utilized, and there is no need to add accessories such as springs. Only one elastic sheet is needed in the structure to replace the lock tongue, spring, connecting rod and other structures in the prior art. The production cost is low, the structure is simple, and the cost performance is high.

[0029] like Figure 3 , 4 As shown, specifically, a first guide surface 33 is obliquely arranged at the left end of the lower surface of the slider 3, a second guide surface 441 cooperating with the first guide surface 33 is arranged on the right side of the lock tongue buckle 44, and resistance stripes are arranged on the arc surface on the left side of the lock tongue buckle 44. The lock tongue buckle 44 slides into the groove 31 through the cooperation between the first guide surface 33 and the second guide surface 441, so that the door closer positioning and release mechanism is in a locked state, and resistance stripes are arranged on the arc surface on the left side of the lock tongue buckle 44 to prevent the door closer positioning and release mechanism from slipping in the opposite direction in the locked state.

[0030] like Figure 5 As shown, further, the arc surface on the left side of the lock tongue buckle 44 is stepped, and the arc surface on the left side of the lock tongue buckle 44 is set to be stepped, which further prevents the door closer and the release mechanism from slipping in the opposite direction in the locked state.

[0031] like Figure 2 , 4As shown, specifically, a threaded through hole 34 is opened above the groove 31 near the first guide surface 33, and a screw 35 is passed through the threaded through hole 34. The screw 35 is used to adjust the resistance between the slider 3 and the lock tongue buckle 44. The adjusting screw 35 is arranged on the slider 3, and the locking force between the limit mechanism 4 and the slider 3 is adjusted by adjusting the screw 35, so that the locking performance of the fire door is more stable.

[0032] like Figure 3 As shown, specifically, a second notch 421 is provided in the middle of the other end in the width direction of the horizontal plate 42 , and a limiting groove 51 recessed to the left is provided on the right side of the shift fork 5 , and the limiting groove 51 and the second notch 421 are engaged with each other.

[0033] like Figure 3 As shown, specifically, the base 2 includes a base 21 and a frame body 22 docked with the base, and the base 21 and the frame body 22 are respectively provided with a card block 211 and a first card slot (not shown) that are snap-connected to each other. The base 21 and the frame body 22 are connected by snapping, and the structure is simple and the operation is convenient.

[0034] like Figure 3 As shown, further, a limiting mechanism 4 is fixedly provided at the right end of the base 21, a control unit 6 is fixedly provided at the left end of the base 21, first through holes 212 are provided on the baffles on both sides of the right end of the base 21, a gantry beam 213 is provided in the middle of the right end of the base 21, a second through hole 45 is provided in the middle of the limiting mechanism 4, and the middle of the limiting mechanism 4 is provided directly below the gantry beam 213. The limiting mechanism 4 is positioned in the base accommodating groove by a fixing pin 214, and the fixing pin 214 passes through the first through hole 212 and the second through hole 45 on the side baffle of the base 21 in sequence.

[0035] like Figure 3 As shown, further, the control unit 6 includes a permanent magnet electromagnetic unit 61 arranged in the base 21, a clamping shaft 62 arranged at the end of the permanent magnet electromagnetic unit 61 and axially movable, and an elastic body 63 sleeved on the clamping shaft 62 and allowing the clamping shaft 62 to axially extend and retract. The elastic body 63 can be a tower spring, and the end of the clamping shaft 62 has a second clamping groove 64. The fork 5 includes a clamping column 52 clamped with the second clamping groove 64 and a shifting member 53 arranged on the top of the clamping column 52. The fork 5 is positioned in the accommodating groove of the base 21 through a fixed column (not shown).

[0036] Specifically, a circuit board is provided on the frame body 22, and the circuit board is electrically connected to a monitoring system provided outside the hollow shell 1, so that the situation around the fire door can be monitored in real time through the monitoring system.

[0037] When the monitoring system detects a fire, the monitoring system sends a command to the circuit board, and the circuit board supplies power to the control unit 6. When the control unit 6 is powered on, it attracts the card shaft 62 to the left, and the card shaft 62 retracts and drives the fork 5 to rotate, so that the limit groove 51 on the right side of the fork 5 is no longer engaged with the left end of the limit mechanism 4. The limit mechanism 4 is in a released state, so that the upper end of the lock tongue buckle 44 is released from the groove 31 at the lower end of the slider 3. Under the action of the hydraulic rod of the door closer, the slider 3 moves to the right in the slide rail 11, thereby closing the door. When the control unit 6 is powered off, under the action of the permanent magnet electromagnetic unit 61, the card shaft 62 remains in the retracted position, and the elastic body 63 is in a compressed state.

[0038] When the fire door is reset after a fire occurs and is reopened to a specified angle, the lower end of the lock tongue buckle 44 enters the groove 31, preventing the slider 3 from moving in the slide rail 11. At this time, the slider 3 presses against the trigger switch (not shown), which feeds back information to the system host (not shown). The host gives an instruction to provide a reverse current to the control unit 6 through the capacitor on the circuit board. At this time, the magnetic field generated by the coil in the control unit 6 is opposite to the magnetic field generated by the permanent magnet electromagnetic unit 61 in the control unit 6, and the two magnetic fields cancel each other out. At this time, the elastomer 63 in the compressed state restores its natural state to drive the card shaft 62 to pop out horizontally, so that the limit groove 51 on the right side of the fork 5 is buckled with the left end of the limit mechanism 4, so that the limit mechanism 4 is automatically positioned, so that the fire door is in a normally open state.

[0039] In summary, the utility model adopts a limiting mechanism made of an elastic sheet, which has a simple structure and low cost.

[0040] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A new type of normally open fire door closer positioning and release mechanism, comprising: A long hollow shell (1) with an opening at the upper end, two parallel and spaced slide rails (11) fixedly arranged at the opening of the hollow shell (1), a base (2) fixedly arranged in the hollow shell (1), a slider (3) slidably arranged on the two slide rails, a limiting mechanism (4) fixedly arranged on the base (2), a shift fork (5) hinged at the middle of the base (2) and buckled with the limiting mechanism (4), and a control unit (6) fixedly arranged on the base (2), wherein a groove (31) is provided on the lower surface of the slider (3), and a connecting column (32) is fixedly arranged in the middle of the upper surface of the slider (3), and the connecting column (32) is used to connect with a connecting arm on a fire door; characterized in that The limiting mechanism (4) comprises two side plates (41) arranged at intervals and corresponding to each other, and a horizontal plate (42) fixedly connected to the two side plates (41); the length of the horizontal plate (42) is less than the length of the side plates (41); the horizontal plate (42) is flush with the left ends of the two side plates (41); the right end of the horizontal plate (42) and the right ends of the two side plates (41) enclose a first notch (43); an arc-shaped elastic locking tongue buckle (44) is provided at one end of the horizontal plate (42) close to the first notch (43) in the width direction; one end of the locking tongue buckle (44) is fixedly connected to the horizontal plate (42); and the other end of the locking tongue buckle (44) is suspended and arranged directly above the first notch (43).

2. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 1, characterized in that: A first guide surface (33) arranged obliquely is provided at the left end of the lower surface of the slide block (3), a second guide surface (441) cooperating with the first guide surface (33) is provided on the right side of the locking tongue buckle (44), and resistance stripes are provided on the left side arc surface of the locking tongue buckle (44).

3. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 2, characterized in that: The left side arc surface of the locking tongue buckle (44) is in a stepped shape.

4. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 1, characterized in that: A threaded through hole (34) is provided above the groove (31) near the first guide surface (33), and a screw (35) is inserted into the threaded through hole (34). The screw (35) is used to adjust the resistance between the slider (3) and the locking tongue buckle (44).

5. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 1, characterized in that: A second notch (421) is provided in the middle of the other end in the width direction of the horizontal plate (42), and a limiting groove (51) recessed to the left is provided on the right side of the shift fork (5), and the limiting groove (51) and the second notch (421) are engaged with each other.

6. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 1, characterized in that: The base (2) comprises a pedestal (21) and a frame body (22) connected to the pedestal (21), and the pedestal (21) and the frame body (22) are respectively provided with a card block (211) and a first card slot which are mutually buckled and connected.

7. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 6, characterized in that: The limiting mechanism (4) is fixedly arranged at the right end of the base (21), and the control unit (6) is fixedly arranged at the left end of the base (21). First through holes (212) are arranged on the baffles on both sides of the right end of the base (21). A gantry beam (213) is arranged in the middle of the right end of the base (21). A second through hole (45) is arranged in the middle of the limiting mechanism (4). The middle of the limiting mechanism (4) is arranged directly below the gantry beam (213). The limiting mechanism (4) is positioned in the receiving groove of the base (21) through a fixing pin (214). The fixing pin (214) passes through the first through hole (212) and the second through hole (45) on the side baffles of the base (21) in sequence.

8. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 7, characterized in that: The control unit (6) comprises a permanent magnet electromagnetic unit (61) arranged in the base (21), a clamping shaft (62) arranged at the end of the permanent magnet electromagnetic unit (61) and capable of axial movement, and an elastic body (63) sleeved on the clamping shaft (62) and enabling the clamping shaft (62) to axially extend and retract, the end of the clamping shaft (62) having a second clamping groove (64), the shift fork (5) comprising a clamping column (52) clamped with the second clamping groove (64) and a shifting member (53) arranged at the top of the clamping column (52), and the shift fork (5) is positioned in the receiving groove of the base (21) through a fixing column.

9. A novel positioning and releasing mechanism for a normally open fire door closer according to claim 6, characterized in that: A circuit board is provided on the frame body (22), and the circuit board is electrically connected to a monitoring system provided outside the hollow shell (1).

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