Positioning release mechanism and normally-open type fireproof door closer
By introducing a positioning and release mechanism into the normally open fire door closer, and utilizing the rotational and translational linkage of the bolt tail support plate and the elastic element, the problems of the complexity and non-adjustability of the limit mechanism are solved, enabling reliable closing to adapt to different door weights, extending service life and reducing costs.
Patent Information
- Application Number
- CN202520352420.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The existing normally open fire door closers have complex limiting mechanisms with numerous parts, and the limiting resistance cannot be adjusted, resulting in the door failing to close reliably during a fire, having a short service life, and being costly.
A positioning and release mechanism is designed, including a bolt tail support plate, a first elastic element and a locking element. By rotating and translating the linkage abutment surface, it can adapt to different door weights, realize the limit and release of the slider, adapt to light or heavy doors, and ensure that the fire door closes in time.
The simplified structure reduces costs, extends service life, and allows for timely closure of fire doors to prevent the spread of fire.
Smart Images
Figure CN223908047U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of normally open fire door closers, and particularly relates to a positioning and release mechanism applied to normally open fire door closers. Background Technology
[0002] In the existing fire protection field, normally open fire door electric door closers have their built-in limit mechanisms activated under normal conditions, keeping the fire door open for easy passage. In the event of an emergency such as a fire, the communication module of the fire door electric door closer receives a closing signal from the system host, causing the limit mechanism to fail and the fire door to close automatically, thereby isolating the fire source, preventing the spread of fire and smoke, and protecting people and property.
[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 by the connecting arm. The slide rail device is equipped with a limit mechanism, and the connecting arm is equipped with a slider. The slider slides on the slide rail device, which allows the door to open or close. After the slider is locked with the limit mechanism, the connecting arm can fix the door at an angle.
[0004] However, the existing limit mechanism has a complex structure and many parts. The limit resistance device cannot be adjusted, which makes it impossible for the fire door closer to fix the counterweight door. In the event of a fire, the light door cannot be closed, resulting in high uncertainty, short service life, high cost, complex process and low cost performance.
[0005] Therefore, there is an urgent need for a new type of normally open fire door closer positioning and release mechanism to solve the above problems. Utility Model Content
[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a positioning release mechanism that is adapted to different door weights and a normally open fire door closer with the positioning release mechanism, which can close the fire door in time to prevent the spread of fire.
[0007] This utility model is implemented as follows: a positioning and release mechanism is applied to a normally open fire door closer. The normally open fire door closer includes a slider for limiting the door position. The positioning and release mechanism is used to limit the slider in a first position and to release the slider limit in a second position. The positioning and release mechanism includes a latch tail support plate and a first elastic member and a locking member installed on the latch tail support plate. The first elastic member has a stop surface for limiting the slider position. The locking member is configured to move the stop surface synchronously toward the latch tail support plate when rotating and translating toward the latch tail support plate, thereby reducing the contact area between the stop surface and the slider to adapt to lightweight doors.
[0008] The locking member is further configured to, when rotating and translating away from the tail support plate of the lock tongue, link the blocking surface to move away from the tail support plate of the lock tongue synchronously, so as to increase the contact area between the blocking surface and the slider, so as to adapt to the heavy door.
[0009] Preferably, the first elastic member comprises a C-shaped elastic body, and the blocking surface is located at the starting position of the upper end of the elastic body.
[0010] Further, the positioning and releasing mechanism comprises a lock tongue support, the end of the lock tongue support extends a support part fixedly connected with the lower end of the elastic body, the support part is provided with a through hole through which the locking member passes, and the upper end of the locking member abuts against the support part, so as to link the blocking surface to move towards the tail support plate of the lock tongue synchronously when the locking member rotates and translates towards the tail support plate of the lock tongue.
[0011] Further, the elastic body, the blocking surface, the support part and the lock tongue support are all made of metal material, and the elastic body is configured to have elasticity after being bent.
[0012] Further, the lock tongue support comprises a support body and support arms located on both sides of the support body for supporting the support body.
[0013] The lock tongue support is fixedly connected with the tail support plate of the lock tongue.
[0014] One end of the two support arms is provided with a first pin shaft arranged close to the tail support plate of the lock tongue, and the lock tongue support rotates around the first pin shaft, so that one end of the lock tongue support moves up and the other end moves down.
[0015] The other end of the two support arms is provided with a second pin shaft arranged away from the tail support plate of the lock tongue, and the second pin shaft is limited, so as to prevent the two ends of the lock tongue support from moving up and down, so that the blocking surface limits the slider.
[0016] The second pin shaft is released from the limitation, and one end of the lock tongue support close to the blocking surface moves down, so that the blocking surface releases the limitation to the slider.
[0017] Further, the support body is arranged obliquely, wherein the position of one end of the support body close to the blocking surface is higher than the position of the other end of the support body away from the blocking surface.
[0018] Further, the positioning and releasing mechanism comprises a puller, and the puller is configured to limit or release the limitation of the second pin shaft.
[0019] Further, the positioning release mechanism further comprises a second elastic member, which is configured to release elastic potential energy to apply a pushing force to one end of the bracket body when the yoke releases the limiting of the second pin shaft, so that the position of the one end of the bracket body away from the abutting surface is higher than the position of the other end of the bracket body close to the abutting surface.
[0020] Further, the yoke comprises a yoke body and a yoke arm fixedly connected with the yoke body, and the lower end of the yoke body is provided with a rotating shaft.
[0021] The yoke arm is configured to abut and limit the second pin shaft when being rotated to a first position around the rotating shaft, and release the limiting of the second pin shaft when being rotated to a second position around the rotating shaft.
[0022] A positioning release mechanism applied to a normally open fire door closer, the normally open fire door closer comprising a sliding block for limiting a door, the positioning release mechanism limiting the sliding block in a first position and releasing the limiting of the sliding block in a second position, the positioning release mechanism comprising a tail support plate of a lock tongue, and a first elastic member and a locking member installed on the tail support plate of the lock tongue, the first elastic member having an abutting surface for limiting the sliding block, the locking member being configured to rotate and translate towards the tail support plate of the lock tongue, and synchronously moving the abutting surface towards the tail support plate of the lock tongue, so as to reduce the abutting area between the abutting surface and the sliding block, to adapt to a light door; the locking member is further configured to rotate and translate away from the tail support plate of the lock tongue, and synchronously move the abutting surface away from the tail support plate of the lock tongue, so as to increase the abutting area between the abutting surface and the sliding block, to adapt to a heavy door, the structure being capable of adapting to different door weights, and timely closing the fire door to prevent the fire from further spreading.
[0023] The utility model further provides a normally open fire door closer, including the sliding block of translation, further include the positioning release mechanism for limiting or releasing the limiting of sliding block above, when releasing the limiting, can close the fire door fast. BRIEF DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the technical scheme of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.
[0025] Figure 1 It is the sectional structure diagram of the limiting of the sliding block of the positioning release mechanism provided by the utility model embodiment.
[0026] Figure 2 It is the sectional structure diagram of the release of the limiting of the sliding block of the positioning release mechanism provided by the utility model embodiment.
[0027] Figure 3 is the structure diagram of the tail part support plate of the locking tongue, the first elastic member and the locking member mounted on the tail part support plate of the locking tongue provided by the embodiment of the utility model.
[0028] Figure 4 is the structure diagram of the tail part support plate of the locking tongue, the first elastic member and the locking member mounted on the tail part support plate of the locking tongue provided by another embodiment of the utility model.
[0029] Figure 5 is the sectional structure diagram of the normally open type fireproof door closer provided by the embodiment of the utility model.
[0030] The realization, functional features and advantages of the utility model will be further explained by combining with embodiments and referring to the drawings.
[0031] Among them, the sign explanation is as follows:
[0032] The normally open type fireproof door closer 10;
[0033] The positioning release mechanism 100, the tail part support plate 110 of the locking tongue, the first elastic member 120, the resistance surface 121, the elastic body 122, the locking member 130, the locking tongue support 140, the support part 140', the support body 141, the support arm 142, the first pin shaft 143, the second pin shaft 144, the pull fork 150, the fork body 151, the fork arm 152, the rotating shaft 153, the second elastic member 160, the connecting rod 170;
[0034] The sliding block 200. Specific implementation
[0035] In the utility model, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.
[0036] And, in addition to the above-mentioned part of the term can be used to indicate the orientation or state relationship, also can be used to indicate other meanings, for example, the term "upper" in some cases can also be used to indicate a certain dependent relationship or connection relationship. For ordinary skilled in the art, the specific meaning of these terms in the utility model can be understood according to the specific situation.
[0037] In addition, the terms "mounting", "arrangement", "provided with", "connected", "linked" should be understood broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. The specific meaning of the above terms in the utility model can be understood by the person skilled in the art according to the specific circumstances.
[0038] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components, and the specific type and structure can be the same or different, and are not intended to indicate or imply the relative importance and quantity of the indicated device, element or component. Unless otherwise stated, the meaning of "multiple" is two or more.
[0039] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model.
[0040] As shown in the drawings, Figures 1-3 The utility model embodiment provides a positioning release mechanism 100, which is applied to the normally open fire door closer 10, the normally open fire door closer 10 includes the sliding block 200 for limiting the door, the positioning release mechanism 100 is used for limiting the sliding block 200 at the first position, and the limiting of the sliding block 200 is released at the second position, the positioning release mechanism 100 includes the lock tongue tail support plate 110 and the first elastic piece 120 and locking piece 130 installed on the lock tongue tail support plate 110, the first elastic piece 120 has the resistance surface 121 for limiting the sliding block 200, the locking piece 130 is configured to rotate and translate towards the lock tongue tail support plate 110, and the resistance surface 121 is moved synchronously towards the lock tongue tail support plate 110, so that the abutting area between the resistance surface 121 and the sliding block 200 can be reduced to adapt to the light door;
[0041] The locking piece 130 is also configured to rotate and translate away from the lock tongue tail support plate 110, and the resistance surface 121 is moved synchronously away from the lock tongue tail support plate 110, so that the abutting area between the resistance surface 121 and the sliding block 200 can be increased to adapt to the heavy door. The above structure can adapt to different door weights, and can timely close the fire door to prevent the fire from further spreading. At the same time, the service life is prolonged, the structure is simplified, and the cost is reduced.
[0042] Preferably, the first elastic piece 120 includes a C-shaped elastic body 122, and the resistance surface 121 is located at the starting position of the upper end of the elastic body 122. The resistance surface 121 preferably extends vertically downward from the starting position of the upper end of the elastic body 122.
[0043] Further, the positioning release mechanism 100 comprises a lock tongue bracket 140, an end of the lock tongue bracket 140 extends a support part 140' fixedly connected with the lower end of the elastic body 122, the support part 140' has a through hole (not shown) through which the locking piece 130 passes, the upper end of the locking piece 130 abuts against the support part 140', when the locking piece 130 rotates and translates towards the lock tongue tail support plate 110, the locking piece 130 is used to drive the abutting face 121 to move towards the lock tongue tail support plate 110 synchronously.
[0044] Further, the elastic body 122, the abutting face 121, the support part and the lock tongue bracket 140 are all metal materials, and the elastic body 122 is configured to have elasticity after being bent.
[0045] Further, the lock tongue bracket 140 comprises a bracket body 141 and support arms 142 located on both sides of the bracket body 141 for supporting the bracket body 141.
[0046] The lock tongue bracket 140 is fixedly connected with the lock tongue tail support plate 110.
[0047] One end of each of the support arms 142 is provided with a first pin shaft 143 arranged close to the lock tongue tail support plate 110, the lock tongue bracket 140 rotates around the first pin shaft 143, so that one end of the lock tongue bracket 140 moves upwards and the other end moves downwards.
[0048] The other end of each of the support arms 142 is provided with a second pin shaft 144 arranged away from the lock tongue tail support plate 110, the second pin shaft 144 is limited in position, used to prevent the two ends of the lock tongue bracket 140 from moving upwards and downwards, so that the abutting face 121 limits the sliding block 200.
[0049] The second pin shaft 144 is released from the position limitation, one end of the lock tongue bracket 140 close to the abutting face 121 moves downwards, so that the abutting face 121 releases the limitation on the sliding block 200.
[0050] Further, the bracket body 141 is arranged obliquely, wherein the position of one end of the bracket body 141 close to the abutting face 121 is higher than the position of the other end of the bracket body 141 away from the abutting face 121, this kind of structure design avoids the phenomenon that the bracket body 141 collides with the sliding block 200 when the second pin shaft 144 is released from the position limitation.
[0051] Further, the positioning release mechanism 100 comprises a puller 150, the puller 150 is configured to limit or release the position limitation of the second pin shaft 144.
[0052] Further, the positioning release mechanism 100 further comprises a second elastic member 160, the second elastic member 160 is configured to release elastic potential energy to exert a pushing force on one end of the bracket body 141 when the puller 150 releases the limiting of the second pin shaft 144, so that the position of the one end of the bracket body 141 away from the abutting surface 121 is higher than the position of the other end of the bracket body 141 close to the abutting surface 121, the speed of the rotation of the bracket body 141 is improved, the efficiency of the door closing is improved indirectly, and the further expansion of the fire is prevented.
[0053] As shown in the drawings, Figure 4 In another embodiment, the second elastic member 160 can also be replaced by a rotating upward connecting rod 170, and the connecting rod 170 is fixedly connected with the puller 150.
[0054] Further, the puller 150 comprises a fork body 151 and a fork arm 152 fixedly connected with the fork body 151, and the lower end of the fork body 151 is provided with a rotating shaft 153.
[0055] The fork arm 152 is configured to resist the limiting of the second pin shaft 144 when rotating around the rotating shaft 153 to a first position, and release the limiting of the second pin shaft 144 when rotating around the rotating shaft 153 to a second position, preferably, the connecting rod 170 and the puller 150 rotate around the same rotating shaft 153, so that the product structure is simplified.
[0056] As shown in the drawings, Figure 5 The utility model further provides a normally open fireproof door closer 10, which comprises a sliding block 200, and the positioning release mechanism 100 for limiting or releasing the limiting of the sliding block 200, and can quickly close the fireproof door when the limiting is released.
[0057] The above is the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and decorations can be made without departing from the principles of the utility model, and these improvements and decorations are also regarded as the protection range of the utility model.
Claims
1. A positioning release mechanism (100) applied to a normally open fire door closer (10) comprising a slider (200) for limiting the door, the positioning release mechanism (100) being used for limiting the slider (200) in a first position and releasing the limitation of the slider (200) in a second position, characterized in that, The positioning release mechanism (100) comprises a tail support plate (110) of a lock tongue, and a first elastic member (120) and a locking member (130) mounted on the tail support plate (110) of the lock tongue, the first elastic member (120) has a resisting surface (121) for limiting the sliding block (200), and the locking member (130) is configured to rotate and translate towards the tail support plate (110) of the lock tongue, and is used for linking the resisting surface (121) to move towards the tail support plate (110) of the lock tongue synchronously, so as to reduce the abutting area between the resisting surface (121) and the sliding block (200) and adapt to a light door. The locking member (130) is also configured to rotate and translate away from the tail support plate (110) of the lock tongue, and is used for linking the resisting surface (121) to move away from the tail support plate (110) of the lock tongue synchronously, so as to increase the abutting area between the resisting surface (121) and the sliding block (200) and adapt to a heavy door.
2. The positioning release mechanism (100) according to claim 1, characterized in that The first elastic member (120) comprises a C-shaped elastic body (122), and the resisting surface (121) is located at the starting position of the upper end of the elastic body (122).
3. The positioning release mechanism (100) according to claim 2, characterized in that The tail support plate (110) of the lock tongue comprises a lock tongue support (140), the end of the lock tongue support (140) extends a support portion (140') fixedly connected with the lower end of the elastic body (122), the support portion (140') has a through hole through which the locking member (130) passes, and the upper end of the locking member (130) abuts against the support portion (140'), so as to link the resisting surface (121) to move towards the tail support plate (110) of the lock tongue synchronously when the locking member (130) rotates and translates towards the tail support plate (110) of the lock tongue.
4. The positioning release mechanism (100) according to claim 3, characterized in that The elastic body (122), the resisting surface (121), the support portion (140') and the lock tongue support (140) are all metal materials, and the elastic body (122) is configured to have elasticity after being bent.
5. The positioning release mechanism (100) according to claim 3, characterized in that The lock tongue support (140) comprises a support body (141) and support arms (142) located on both sides of the support body (141) and used for supporting the support body (141); The lock tongue support (140) is fixedly connected with the tail support plate (110) of the lock tongue; One end of each of the support arms (142) is provided with a first pin shaft (143) arranged close to the tail support plate (110) of the lock tongue, and the lock tongue support (140) rotates around the first pin shaft (143), so that one end of the lock tongue support (140) moves upwards and the other end moves downwards; The other end of each of the support arms (142) is provided with a second pin shaft (144) arranged away from the tail support plate (110) of the lock tongue, and the second pin shaft (144) is limited, so as to prevent the two ends of the lock tongue support (140) from moving upwards and downwards, and the resisting surface (121) limits the sliding block (200). The second pin shaft (144) is released from the limiting position, and the end of the lock tongue bracket (140) close to the blocking surface (121) moves downward, so that the blocking surface (121) is released from the limiting position of the sliding block (200).
6. The positioning release mechanism (100) according to claim 5, characterized in that The bracket body (141) is inclined, and the end of the bracket body (141) close to the blocking surface (121) is higher than the other end of the bracket body (141) away from the blocking surface (121).
7. The positioning release mechanism (100) according to claim 5, characterized in that The pulling fork (150) is arranged to limit or release the second pin shaft (144).
8. The positioning release mechanism (100) according to claim 7, characterized in that The second elastic member is arranged to release elastic potential energy to apply a pushing force to one end of the bracket body (141) when the pulling fork (150) releases the second pin shaft (144) from the limiting position, so that the end of the bracket body (141) away from the blocking surface (121) is higher than the other end of the bracket body (141) close to the blocking surface (121).
9. The positioning release mechanism (100) according to claim 7, characterized in that The pulling fork (150) includes a fork body (151) and a fork arm (152) fixedly connected to the fork body (151), and the lower end of the fork body (151) is provided with a rotating shaft (153). The fork arm (152) is arranged to rotate around the rotating shaft (153) to a first position to limit the second pin shaft (144), and to rotate around the rotating shaft (153) to a second position to release the second pin shaft (144) from the limiting position.
10. A fire rated door closer (10) of the constant open type comprising a translating shoe (200), characterised in that, The positioning and releasing mechanism (100) for limiting or releasing the sliding block (200) according to any one of claims 1 to 9 is further included.