Fireproof door closer and signal feedback module mounting structure thereof

Abstract

The invention relates to a fireproof door closer and a signal feedback module mounting structure thereof.The fireproof door closer comprises a feedback support, a mounting cavity is formed in the top of the feedback support, a signal feedback switch assembly is mounted in the mounting cavity, a first through hole and a second through hole are formed in a bottom plate of the mounting cavity, and the first through hole allows the trigger end of the signal feedback switch assembly to extend downwards; a second through hole is formed in the feedback support, an auxiliary positioning hook is arranged at the second through hole, a fixing part is further arranged on the feedback support, a vertically-through locking screw hole is formed in the fixing part, a locking bolt is in threaded connection with the interior of the locking screw hole, and when the locking bolt is not locked, the door closer sliding block can push the feedback support to synchronously move in the sliding groove through the auxiliary positioning hook in the door closing process. After the locking bolt is locked, the auxiliary positioning hook can be pressed upwards into the second through hole when the sliding block slides to pass through the feedback support. The auxiliary positioning hook has the advantages that the auxiliary positioning hook can automatically, quickly and accurately assist in positioning and mounting of the feedback support, mounting on a sliding door face and a pushing door face is not affected, and applicability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of building fire protection equipment and electric door closers, and particularly relates to a fire door closer and an installation structure of its signal feedback module. Background Art

[0002] Fire door closers are mainly applied to fire doors in various public places or commercial occasions, and their components have relatively high requirements for fire safety. Intelligent fire door closers (electric door closers) have functions of remote control for opening and closing doors and signal feedback.

[0003] The installation of electric door closers is rather troublesome, especially in the installation of signal feedback modules: during the installation process, installers need to repeatedly adjust the positions of opening and closing doors to ensure accurate signal feedback after the doors are opened and closed in place; since the slider and the feedback bracket need to cooperate, the positioning requirements are relatively high, and it cannot be guaranteed to be adjusted to a suitable position at one time, which requires a structure or tool that can assist in installation and positioning. Currently, there is no relevant structure design or tool for auxiliary installation and positioning in the market. Currently, workers need to manually adjust the position of the feedback bracket back and forth many times when installing and positioning the feedback bracket and test the sensitivity of the closing feedback of the switch at the corresponding position, which is time-consuming and laborious. In addition, when installing an electric door closer, it may be installed on the pushing surface of the door or on the pulling surface of the door. When installed on the pushing surface of the door, during the process of opening and closing the door, the slider in the chute will move beyond the feedback bracket. Therefore, in order to ensure that the electric door closer can adapt to the installation on both the pushing surface and the pulling surface of the door, it must also be ensured that after the feedback bracket is fixed in the chute, if necessary, the slider can move beyond the feedback bracket. In other words, for the above reasons, after the feedback bracket of the existing electric door closer is fixed in the chute, when the slider slides in the chute, it can pass by the feedback bracket, and the feedback bracket will not cause obvious blockage to the slider. This is also one of the reasons why it is difficult to quickly find the position of the feedback bracket when positioning the feedback bracket after the door is closed in place. Summary of the Invention

[0004] The present invention provides a fire door closer and an installation structure of its signal feedback module, aiming to overcome the above-mentioned deficiencies existing in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: A signal feedback module installation structure of a fire door closer, which includes a feedback bracket installed in the closer chute. The top of the feedback bracket is provided with an upward-opening installation cavity. A signal feedback switch assembly is installed in the installation cavity. The bottom plate of the installation cavity is provided with a first through hole and a second through hole. The first through hole allows the trigger end of the signal feedback switch assembly to extend downward to below the bottom surface of the bottom plate. An auxiliary positioning hook is provided at the second through hole. The feedback bracket is also provided with a fixing part. The fixing part is provided with a locking screw hole that penetrates up and down. A locking bolt is threadedly connected in the locking screw hole. When the locking bolt is not tightened, during the closing process, the closer slider can push the feedback bracket to move synchronously in the chute through the auxiliary positioning hook. After the locking bolt is tightened, the slider can slide past below the feedback bracket and press the auxiliary positioning hook upward into the second through hole when passing through the feedback bracket.

[0006] On the basis of the above technical solution, the present invention can be further improved as follows.

[0007] Further, the auxiliary positioning hook is a rigid long plastic strip. The second through hole is a long hole extending in the left-right direction. One end of the plastic strip is fixedly connected to one end wall of the long hole. The other end of the plastic strip extends toward the other end of the long hole and bends downward to form a hook-shaped head that extends below the bottom surface of the bottom plate.

[0008] Further, the plastic strip and the feedback bracket are integrally formed of the same plastic. Both left and right sides of the hook-shaped head are provided with inclined surfaces.

[0009] Further, the auxiliary positioning hook is a metal elastic sheet. The metal elastic sheet has a hook-shaped head that extends through the second through hole to below the bottom surface of the bottom plate.

[0010] Further, the end where the hook-shaped head is located is the free end of the metal elastic sheet. The other end of the metal elastic sheet is fixedly connected to the bottom plate by a fixing screw.

[0011] Further, the signal feedback switch assembly includes a micro switch. A fixing groove surrounded by a plurality of limit posts and a plurality of elastic buckles is provided around the first through hole in the installation cavity. After the micro switch is pressed into the fixing groove, it is fixed by the limit posts and the elastic buckles.

[0012] Further, the micro switch is electrically connected to a main control circuit board provided on a limit bracket through a spiral wire.

[0013] Further, the micro switch is electrically connected to one end of a spiral wire through a sub-control circuit board disposed in the installation cavity, the other end of the spiral wire is electrically connected to a main control circuit board disposed on the limit bracket, a manual door closing button is integrated on the sub-control circuit board, and a button hole corresponding to the manual door closing button is provided on the bottom plate.

[0014] Further, the first through hole and the second through hole are respectively disposed on the front and rear sides of the bottom plate of the feedback bracket, and the locking screw hole is located in the middle of the bottom plate and corresponds to the bottom opening of the sliding groove.

[0015] The present invention also provides a fire door closer having the above signal feedback module installation structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The fire door closer and its signal feedback installation structure provided by the present invention have an auxiliary positioning hook. When the feedback bracket is installed in place for closing the door in the sliding groove, the auxiliary positioning hook can be pushed to move synchronously by the slider sliding along the sliding groove when the door is closed in place. During the synchronous movement, the slider has determined to trigger the trigger end of the signal feedback switch assembly on the feedback bracket, and due to the existence of the auxiliary positioning hook, the feedback bracket moves synchronously with the slider. Therefore, the position of the feedback bracket in the sliding groove when the door is closed in place is its accurate fixed position. At this time, only need to tighten the locking bolt for positioning to complete the installation of the feedback bracket, without the need for additional manual alignment adjustment or adjustment after testing, and the installation efficiency is significantly improved.

[0018] In addition, when the closer is installed on the push door surface, during the process of opening and closing the door, the slider will slide under the feedback bracket that has been positioned and fixed in the sliding groove. In the present invention, when the auxiliary positioning hook is under greater pressure, it can retract into the second through hole to make way for the slider, that is, the signal feedback module installation structure of the fire door closer provided by the present invention can accurately position the installation position of the feedback bracket automatically and accurately, and does not affect the installation of the closer on the push door surface, and is applicable to both the push door surface and the pull door surface, with good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Is an axonometric view of a fire door closer provided by the present invention (with a signal feedback module installation structure);

[0020] Figure 2 Is Figure 1 A cross-sectional view of the fire door closer shown;

[0021] Figure 3 Is Figure 2 An enlarged view showing the signal feedback module installation structure in;

[0022] Figure 4 IsFigure 3 Axonometric schematic diagram of the installed structure of the signal feedback module shown after dissection (showing the slider cooperating therewith);

[0023] Figure 5 For Figure 3 Axonometric view of the installed structure of the signal feedback module shown;

[0024] Figure 6 For Figure 5 Axonometric view of the installed structure of the signal feedback module shown as observed from one side of the installation cavity (the locking bolt is not shown);

[0025] Figure 7 For Figure 5 Axonometric view of the installed structure of the signal feedback module shown as observed from one side below the bottom plate (the locking bolt is not shown);

[0026] Figure 8 Exploded view of the installed structure of the signal feedback module with a sub-control circuit board;

[0027] Figure 9 Exploded view of the installed structure of the signal feedback module without a sub-control circuit board;

[0028] Figure 10 Axonometric view of the installed structure of the signal feedback module when the auxiliary positioning hook is a metal elastic sheet;

[0029] Figure 11 For Figure 10 Cross-sectional view of the installed structure of the signal feedback module shown;

[0030] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0031] 1, chute; 2, feedback bracket; 3, slider; 4, limit bracket; 5, installation cavity; 6, first through hole; 7, second through hole; 8, auxiliary positioning hook; 9, fixing part; 10, locking screw hole; 11, locking bolt; 12, metal elastic sheet; 13, fixing screw; 14, micro switch; 15, spiral wire; 16, limit post; 17, elastic buckle; 18, main control circuit board; 19, sub-control circuit board; 20, manual door closing button; 21, button hole. Detailed implementation manners

[0032] The principles and features of the present invention will be described below in conjunction with the accompanying drawings and specific embodiments. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0033] In the description of the present invention, if terms indicating directions such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. are used, the directions or positional relationships indicated are based on the directions or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as a limitation to the present invention.

[0034] As Figures 1 to 11 shown, the present invention provides a signal feedback module installation structure for a fire door closer, which includes a feedback bracket 2 installed in the closer chute 1. An upward-opening installation cavity 5 is provided at the top of the feedback bracket 2. A signal feedback switch assembly is installed in the installation cavity 5. A first through hole 6 and a second through hole 7 are formed on the bottom plate of the installation cavity 5. The first through hole 6 allows the trigger end of the signal feedback switch assembly to extend downward to the bottom surface below the bottom plate. An auxiliary positioning hook 8 is provided at the second through hole 7. A fixing part 9 is also provided on the feedback bracket 2. A locking screw hole 10 penetrating up and down is formed on the fixing part 9. A locking bolt 11 is threadedly connected in the locking screw hole 10. When the locking bolt 11 is not tightened, during the closing process of the door, the closer slider 3 can push the feedback bracket 2 to move synchronously in the chute 1 through the auxiliary positioning hook 8. After the locking bolt 11 is tightened, the slider 3 can slide past below the feedback bracket 2 and press the auxiliary positioning hook 8 upward into the second through hole 7 when passing by the feedback bracket 2.

[0035] It should be noted that during the closing process of the door, due to the existence of the auxiliary positioning hook, the slider will drive the feedback bracket to move synchronously to the position where the door is closed in place, achieving precise positioning. When the slider contacts the auxiliary positioning hook, the trigger end of the signal feedback switch assembly has also been triggered. Therefore, when the door is closed in place, only need to tighten the locking bolt to complete the fixation of the feedback bracket in the chute. When installing the closer on the push side of the door, during the closing process, the slider will move back and forth to the front and rear positions of the feedback bracket. Therefore, in order to ensure that it can also be applied on the push side of the door and does not affect the situation where the slider moves past the feedback bracket, it is also necessary that when the auxiliary positioning hook is subjected to a large pressure, it can deform in the direction of the second through hole so that the slider can successfully pass below the feedback bracket, ensuring that the auxiliary positioning hook can both accurately assist in positioning and does not affect the installation on the push side of the door, maintaining good applicability.

[0036] A fire door closer generally includes a fire door linkage chute (referred to as a chute for short), a door opening and closing actuating link, and a hydraulic device. During installation, the chute is installed on the fire door frame, the hydraulic device is installed on the fire door leaf, and the hydraulic device is connected to the slider on the chute through the door opening and closing actuating link. When installing the fire door closer on site, sometimes it is installed on the pushing surface of the door, and sometimes it is installed on the pulling surface of the door. The pushing surface and the pulling surface are respectively the front and back sides of the door. When installed on the pushing surface, during the door opening and closing process, the slider will move beyond the feedback bracket and then move back, while when installed on the pulling surface, it will not move beyond the feedback bracket.

[0037] In an embodiment of the present invention, as Figures 4 to 7 shown, the auxiliary positioning hook 8 is a rigid long plastic strip, the second through hole 7 is a long hole extending in the left - right direction, one end of the plastic strip is fixedly connected to one end wall of the long hole, and the other end of the plastic strip extends towards the other end of the long hole and bends downward to form a hook - shaped head extending below the bottom surface of the bottom plate. The plastic strip and the feedback bracket 2 are integrally formed of the same plastic, and both left and right sides of the hook - shaped head are provided as inclined surfaces.

[0038] It should be noted that setting both left and right sides of the hook - shaped head as inclined surfaces ensures that when a relatively large horizontal force is generated on the auxiliary positioning hook by the slider ( Figure 3 F1 in it), the hook - shaped head can be subjected to a component force in the vertical direction and move towards the direction inside the second through hole, which is equivalent to retracting into the second through hole when the pressure is large enough to make way for the slider to exceed the feedback bracket. Generally speaking, when the feedback bracket is not locked by the locking bolt, its sliding in the chute does not need to overcome too much force, mainly the resultant force of the frictional resistance and the pulling force of the spiral line on it ( Figure 3 shown as F2 in it). At this time, the hook - shaped head hardly deforms towards the inside of the second through hole, and the slider pushes the feedback bracket to move synchronously through the auxiliary positioning hook.

[0039] In an embodiment of the present invention, as Figure 10 and 11 shown, the auxiliary positioning hook 8 is a metal elastic sheet 12, and the metal elastic sheet 12 has a hook - shaped head extending below the bottom surface of the bottom plate through the second through hole 7.

[0040] It should be noted that the stiffness, elastic force, etc. of the metal shrapnel are relatively easy to control, and metal shrapnel of appropriate size specifications can be produced and customized. It can ensure that when the door is closed in place, it can basically not undergo vertical retraction deformation and can drive the feedback bracket to move, and when the feedback bracket is locked, when the slider moves beyond the sliding bracket, it will not overcome too large a force from the auxiliary positioning hook. In addition, the metal shrapnel has good durability, and its service life is generally longer than that of the plastic auxiliary positioning hook. However, its disadvantage is that it cannot be integrally formed with the feedback bracket and needs to be fixedly installed separately through fixing screws, etc.

[0041] In an embodiment of the present invention, the end where the hook head is located is the free end of the metal shrapnel 12, and the other end of the metal shrapnel 12 is fixedly connected to the bottom plate through a fixing screw 13.

[0042] As Figure 11 shown, one end of the metal shrapnel is fixedly connected to the feedback bracket bottom plate through fixing screws (the fixing screws are preferably two arranged side by side at intervals front and back), and the other end bends towards the direction where the fixing screws are located after bypassing a stop block 9, and first forms a right-angled step surface and then forms a slope surface, and the hook head portion includes the right-angled step surface and the slope surface.

[0043] When the right-angled step surface is acted on by the slider, a relatively large force is required to press the hook head portion of the metal shrapnel into the second through hole. If the feedback bracket is not fixed in the chute, the hook head portion of the metal shrapnel will not be pressed into the second through hole, but the slider will push the feedback bracket to move synchronously to the door-closed in-place position to achieve automatic positioning; if the feedback bracket has been fixed in the chute, when the force of the slider on the right-angled step surface is relatively large, the hook head portion will be pressed into the second through hole to make way for the slider. In addition, when the slider approaches the hook head portion from the other direction and first contacts the slope surface, due to the design of the slope surface, relatively speaking, a relatively small force can be overcome to press the hook head portion into the second through hole.

[0044] It should be noted that, as Figure 11 can be seen, in order to prevent the metal shrapnel from deforming upwards when acted on by the slider in the door-closing direction, a blocking block can be provided inside the metal shrapnel, and the blocking block is fixed on the feedback bracket.

[0045] In an embodiment of the present invention, as Figure 8 and 9 shown, the signal feedback switch assembly includes a micro switch 14. A fixing groove surrounded by a plurality of limit posts 16 and a plurality of elastic buckles 17 is provided around the first through hole 6 in the installation cavity 5. After the micro switch 14 is pressed into the fixing groove, it is fixed by the limit posts 16 and the elastic buckles 17.

[0046] It should be noted that the micro switch used in the present invention belongs to a small micro switch. Generally, it is integrated on a circuit board or connected to the circuit board through a wire and then connected to the main control circuit board through a spiral wire. The micro switch is small in size and not convenient for up and down snap-on installation. The present invention adopts a method of applying force from the side and positioning around to fixedly install it on the feedback bracket. Two opposite sides of the micro switch are set as inclined surfaces, and supporting inclined surfaces corresponding to the above-mentioned inclined surfaces are arranged on the limiting columns at both ends of the fixing groove. The elastic buckle then presses and fixes the micro switch from above.

[0047] In an embodiment of the present invention, as Figure 9 shown, the micro switch 14 is electrically connected to the main control circuit board 18 provided on the limiting bracket 4 through a spiral wire 15.

[0048] It should be noted that adopting this method can save a sub-control circuit board and there is no need to separately set a sub-control circuit board on the feedback bracket, but this will also make it impossible to manually control the door opening and closing signal at the feedback bracket.

[0049] In an embodiment of the present invention, as Figure 8 shown, the micro switch 14 is electrically connected to one end of the spiral wire 15 through a sub-control circuit board 19 provided in the installation cavity 5, the other end of the spiral wire 15 is electrically connected to the main control circuit board 18 provided on the limiting bracket 4, a manual door closing button 20 is integrated on the sub-control circuit board 19, and a button hole 21 corresponding to the manual door closing button 20 is provided on the bottom plate.

[0050] It should be noted that this installation method can ensure that a door closing signal can be given through the manual door closing button at the feedback bracket.

[0051] In an embodiment of the present invention, the first through hole 6 and the second through hole 7 are respectively arranged on the front and rear sides of the bottom plate of the feedback bracket 2, and the locking screw hole 10 is located in the middle of the bottom plate and corresponds to the bottom opening of the sliding groove 1.

[0052] On the basis of the above-mentioned various implementation examples, the present invention further provides a fire door closer, which has the above-mentioned signal feedback module installation structure.

[0053] It should be noted that when the electric door closer is installed on the push side of the door, during the process of opening and closing the door, the slider will move beyond the feedback bracket and then move back; when the electric door closer is installed on the pull side of the door, during the process of opening and closing the door, the slider will not move beyond the feedback bracket. Therefore, when designing the feedback bracket with automatic positioning function, the above two situations must be considered because in practice, it may be installed on the pull side or the push side of the door. The feedback bracket and the limit bracket are connected by a spiral line. During installation, first fix the position of the limit bracket. When the door is closed, the closing position is determined. At this time, the slider also moves to the closing position and synchronously drives the feedback bracket to move to the installation position. At this time, the installer only needs to tighten the locking bolt on the feedback bracket to complete the installation. There is a boss designed on the slider. When it moves to the closing position, the boss on the slider presses on the signal feedback switch (trigger end) to achieve the door closing in place and signal feedback. When the slider pushes the feedback bracket in the closing direction, it needs to overcome the pulling force and friction of the spiral line; on the contrary, it only needs to overcome the friction. There is a hook with a guide (auxiliary positioning hook) designed on the feedback bracket. The hook adopts a cantilever beam structure design and can deform and rebound up and down; a certain force is required to deform the hook when the slider is pushed. After the feedback bracket is fixed in the chute, during the closing process of the door, since the hook can deform and give way, the slider can move on the feedback bracket without affecting the opening and closing of the door.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A signal feedback module installation structure of a fire door closer, characterized in that, It includes a feedback bracket (2) installed in a closing device chute (1). An upward-opening installation cavity (5) is provided at the top of the feedback bracket (2). A signal feedback switch assembly is installed in the installation cavity (5). A first through hole (6) and a second through hole (7) are formed in the bottom plate of the installation cavity (5). The trigger end of the signal feedback switch assembly extends downward through the first through hole (6) to the bottom surface of the bottom plate. An auxiliary positioning hook (8) is provided at the second through hole (7). A fixing part (9) is also provided on the feedback bracket (2). A locking screw hole (10) penetrating up and down is formed in the fixing part (9). A locking bolt (11) is threadedly connected in the locking screw hole (10). When the locking bolt (11) is not tightened, during the door closing process, the closing device slider (3) can push the feedback bracket (2) to move synchronously in the chute (1) through the auxiliary positioning hook (8). After the locking bolt (11) is tightened, the slider (3) can slide past below the feedback bracket (2) and press the auxiliary positioning hook (8) upward into the second through hole (7) when passing by the feedback bracket (2).

2. The installation structure of the signal feedback module of a fire door closer according to claim 1, characterized in that, The auxiliary positioning hook (8) is a rigid long plastic strip. The second through hole (7) is a long hole extending in the left-right direction. One end of the plastic strip is fixedly connected to one end wall of the long hole. The other end of the plastic strip extends to the other end of the long hole and bends downward to form a hook-shaped head extending below the bottom surface of the bottom plate.

3. The signal feedback module installation structure of a fire door closer according to claim 2, characterized in that, The plastic strip and the feedback bracket (2) are integrally formed of the same plastic. Both left and right sides of the hook-shaped head are provided as inclined surfaces.

4. The installation structure of the signal feedback module of a fire door closer according to claim 1, characterized in that, The auxiliary positioning hook (8) is a metal elastic sheet (12). The metal elastic sheet (12) has a hook-shaped head extending below the bottom surface of the bottom plate through the second through hole (7).

5. The installation structure of the signal feedback module of a fire door closer according to claim 4, characterized in that, The end where the hook-shaped head is located is the free end of the metal elastic sheet (12). The other end of the metal elastic sheet (12) is fixedly connected to the bottom plate by a fixing screw (13).

6. The installation structure of the signal feedback module of a fire door closer according to claim 1, characterized in that The signal feedback switch assembly includes a microswitch (14). A fixing groove surrounded by a plurality of limit posts (16) and a plurality of elastic buckles (17) is provided around the first through hole (6) in the installation cavity (5). After the microswitch (14) is pressed into the fixing groove, it is fixed by the limit posts (16) and the elastic buckles (17).

7. The installation structure of the signal feedback module of a fire door closer according to claim 6, characterized in that, The microswitch (14) is electrically connected to a main control circuit board (18) provided on a limit bracket (4) through a spiral wire (15).

8. The installation structure of the signal feedback module of a fire door closer according to claim 6, characterized in that, The microswitch (14) is electrically connected to one end of the spiral wire (15) through a sub-control circuit board (19) provided in the installation cavity (5). The other end of the spiral wire (15) is electrically connected to the main control circuit board (18) provided on the limit bracket (4). A manual door closing button (20) is integrated on the sub-control circuit board (19). A button hole (21) corresponding to the manual door closing button (20) is provided on the bottom plate.

9. The installation structure of the signal feedback module of a fire door closer according to any one of claims 1 to 8, characterized in that The first through hole (6) and the second through hole (7) are respectively arranged on the front and rear sides of the bottom plate of the feedback bracket (2), and the locking screw hole (10) is located in the middle of the bottom plate and corresponds to the bottom opening of the sliding groove (1).

10. A fire door closer, characterized in that, Having the signal feedback module mounting structure according to any one of claims 1 to 9.

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