Electric shutter gate rapid descent stop device

Abstract

This invention provides a device to prevent electric shutter gates from rapidly descending even if control is lost. [Solution] The rapid descent stop device for the electric shutter gate includes a shutter gate 11 of an electric gate 10 that moves up and down along a guide rail 130 by an electric motor. Each rapid descent stop device has at least one braker 30 and a traction shaft 22 attached to the upper end of the guide rails of a pair of gateposts via a fixed seat. The traction shaft 22 is linked to the raising and lowering operation of a set of shutter gates. The braker includes a ratchet rotating group and a ratchet seat. The ratchet rotating group is located on a support seat provided on the face end of a first rotating disc. The support seat has a pivot shaft hole formed through the first rotating disc in its center and to which the traction shaft is attached.

Description

Technical Field

[0001] The present invention relates to an emergency descent stop device for an electric shutter gate that prevents the shutter gate from suddenly descending even if control is lost when opening or raising and lowering the shutter gate.

Background Art

[0002] An electric shutter gate raises and lowers the shutter gate along the guide rails of the doorposts by the power of an electric motor to open and close a folding gate. For example, taking an electric shutter as an example, a winding shaft in a case is driven by a motor to wind up shutter slats that can be wound up and are connected in series along the guide rails of the doorposts. For example, in the case of an electric folding gate, when a motor winds up a pull cord by a cord roller on a roller shaft, rollers provided on both sides of the lower door piece of the folding gate are raised and lowered along the guide rails of the doorposts by the pull cord. Whether it is an electric shutter or an electric folding gate, a speed change mechanism or a speed reduction mechanism is provided in the motor that drives the shutter gate so that the control of the raising and lowering speed of the shutter gate is not lost. However, these mechanisms may be damaged or malfunction due to aging or fatigue after long-term use. When the teeth of the gears in the speed change case of the shutter gate that winds up or pulls are crushed, or when the chain or pull cord breaks, the shutter gate in the open state or the shutter gate during raising and lowering may have an accident of suddenly descending due to the loss of control on the motor side. Therefore, if a braking mechanism is not intervened in a timely manner, there is a risk that the user may be injured.

[0003] In view of such a situation, the inventor of the present invention has completed the present invention with various ideas based on many years of manufacturing and design experience and knowledge in the related field.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The main objective of the present invention is to provide a device for preventing a shutter gate from rapidly descending even if control is lost when opening or raising / lowering the shutter gate. [Means for solving the problem]

[0005] To solve the above problems, according to a first embodiment of the present invention, an electric shutter gate rapid descent stop device is provided, which includes a set of electric shutter gates that move up and down along guide rails of a pair of gate posts by an electric motor, wherein at least one rapid descent stop device is provided above the pair of gate posts, each rapid descent stop device is attached to the upper end of the guide rails of the pair of gate posts via a fixed seat to at least one braker and a traction shaft, the traction shaft is linked to the up and down movement of the set of shutter gates, the braker includes a ratchet rotating group and a ratchet seat, the ratchet rotating group is located on a support seat provided on the face end of a first rotating disc, the support seat has a pivot shaft hole formed through the first rotating disc in its center and to which the traction shaft is attached, and at least one claw housing space is formed between the first rotating disc and the support seat, a banana-shaped ratchet member is provided on each of the claw housing spaces, and the balance of each ratchet member The present invention provides a rapid descent stopping device for an electric shutter gate, characterized in that the weight body has a pivot hole at one end and a ratchet portion at the other end, a limiting portion is provided on one side of the body portion of the balance weight body, the pivot is pivotally mounted on the first rotating disk via the pivot hole, the ratchet portion has an engagement end face formed by providing a square notch on the opposite side of the pivot hole of the balance weight body, the limiting portion has an elastic member that acts on the support seat and restricts the ratchet portion and the engagement end face from extending beyond the periphery of the first rotating disk under normal conditions, the ratchet seat is fixed on the fixed seat and has a ratchet hole formed through to surround the periphery of the first rotating disk, a plurality of arc-shaped notches for accommodating the balance weight body of the ratchet member are arranged in annular shape in the radial direction of the hole wall of the ratchet hole to form a plurality of ratchet teeth, and each of the ratchet teeth has a stopper surface.

[0006] The support seat has an insertion hole formed corresponding to the limiting portion of the ratchet member, the limiting portion has a screw hole for screwing in a screw, and the elastic member is a compression spring, preferably with one end inserted into the insertion hole and the other end inserted into the screw hole and in contact with the screw.

[0007] Preferably, a pair of pawl housing spaces is formed between the support seat of the ratchet rotation group and the first rotating disc, each of the pawl housing spaces has a pair of ratchet members, the pair of ratchet members is pivotally mounted on the first rotating disc via the pivot, each ratchet member's balance weight body has a shaft near the ratchet portion, one end of each shaft is inserted through a pair of oval holes in the first rotating disc and pivotally mounted to a pair of connecting rods, the other ends of the pair of connecting rods are pivotally mounted to both ends of a synchronous interlocking member, and a bearing hole is formed in the center of the synchronous interlocking member for mounting a bearing that rotates freely on the traction shaft.

[0008] Preferably, the support seat is provided with a second rotating disc on a different surface from the first rotating disc, the second rotating disc having the same structure and shape as the first rotating disc, and having a pair of oval holes through which a pair of ratchet members are pivotally attached and through which the shaft is inserted to pivotally attach the other pair of connecting rods, the other ends of the other pair of connecting rods being pivotally attached to both ends of the other synchronous interlocking member, the center of the other synchronous interlocking member having a bearing hole for attaching a bearing that rotates freely on the traction shaft, and pivot shafts being provided at both ends of the pair of synchronous interlocking members to interlock.

[0009] The electric motor of the electric gate winds up a set of shutter gates, each slat connected in series, using a door winding shaft, and raises and lowers them along the guide rails of a pair of gate posts. Preferably, the fixed seat of the rapid descent stop device has the brake attached to a frame-shaped base on the side plate of the case, and the traction shaft is fixed to the door winding shaft and formed into a part of the door winding shaft.

[0010] The set of shutter gates of the electric gate is a set of folding gates configured by pivoting a lower door piece to one end of an upper door piece pivotally mounted on an upper door beam, the electric motor drives at least one rope shaft of a wheel axle on the upper door beam, the pull cord wound on each rope shaft pulls rollers provided on both sides of the lower door piece, causing it to rise and fall along the guide rails of a pair of gate posts, and the fixed seat of each steep descent stop device connects the brake and the traction shaft to the pair of gate posts The upper end is attached to the suspension base on the upper door beam, the traction shaft is assembled on the pivot shaft hole of the ratchet rotation group of the brake, a winding device is fixed to one end and the coil spring is provided on the other end, a string is wound around the winding device, the lower door piece is connected to the tensioned end of the string, the coil spring is covered by a cover coupled to the ratchet seat, the outer end of the coil spring is restricted by a limiting member provided on the cover and the inner end is preferably connected to the traction shaft.

[0011] Preferably, the winding device is fixed to one end of the traction shaft, and the brakes, which are fixed to the fixing base, are provided correspondingly on the traction shaft on both sides of the winding device.

[0012] It is preferable to provide coil springs and limiting covers at both ends of the traction shaft on both sides of the winding device, and to fix them respectively on the ratchet seat. [Effects of the Invention]

[0013] The electric shutter gate sudden descent stop device of the present invention can prevent the shutter gate from suddenly descending even if control is lost when opening or raising / lowering the shutter gate. [Brief explanation of the drawing]

[0014] [Figure 1] Figure 1 is a perspective view showing an electric shutter gate rapid descent stop device according to one embodiment of the present invention used in a shutter lifting transmission structure. [Figure 2]Figure 2 is an exploded perspective view showing an electric shutter gate rapid descent stop device according to one embodiment of the present invention, installed on the upper part of a gate post. [Figure 3] Figure 3 is an exploded perspective view showing the structure of a rapid descent stop device for an electric shutter gate according to one embodiment of the present invention. [Figure 4] Figure 4 is an exploded perspective view showing the brake of a rapid descent stop device for an electric shutter gate according to one embodiment of the present invention. [Figure 5] Figure 5 is an exploded perspective view showing the structure of the ratchet rotation group of a rapid descent stop device for an electric shutter gate according to one embodiment of the present invention. [Figure 6] Figure 6 is a plan view of the brake of an electric shutter gate rapid descent stop device according to one embodiment of the present invention, in a state in which a second rotating disc is not provided. [Figure 7] Figure 7 is an explanatory diagram illustrating the state in which the shutter of an electric shutter gate rapid descent stop device according to one embodiment of the present invention loses control. [Figure 8] Figure 8 is an enlarged view of section A in Figure 7. [Figure 9] Figure 9 is an enlarged view of portion A in Figure 7, showing the state in which the shutter of the electric shutter gate rapid descent stop device according to one embodiment of the present invention has lost control. [Figure 10] Figure 10 is a perspective view showing an electric shutter gate rapid descent stop device according to another embodiment of the present invention used in an electric folding gate. [Figure 11] Figure 11 is a perspective view showing the structure of a rapid descent stop device for an electric shutter gate according to another embodiment of the present invention. [Figure 12] Figure 12 is an exploded perspective view showing the structure of a rapid descent stop device for an electric shutter gate according to another embodiment of the present invention. [Figure 13] Figure 13 is an exploded perspective view showing a coil spring in a rapid descent stop device for an electric shutter gate according to another embodiment of the present invention. [Figure 14] Figure 14 is an explanatory diagram showing a state in which the gate of an electric shutter gate according to another embodiment of the present invention has not lost control. [Figure 15] FIG. 15 is an explanatory diagram showing a state where the gate of the electric shutter gate according to another embodiment of the present invention has lost control. [Figure 16] FIG. 16 is an enlarged view of part B of FIG. 14. [Figure 17] FIG. 17 is an enlarged view of part C of FIG. 15.

Embodiments for Carrying Out the Invention

[0015] In order to more completely and clearly disclose the technical means of the present invention and the effects that can be achieved thereby, the present invention will be described in detail below in conjunction with the attached drawings and reference numerals that have been disclosed.

[0016] Refer to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the rapid descent stop device of the electric shutter gate according to an embodiment of the present invention includes a pair of shutter gates 11 of an electric gate 10 that are lifted and lowered along the guide rails 130 (refer to FIG. 7) of a pair of gate posts 13 by an electric motor 12. Above the pair of gate posts 13, at least one rapid descent stop device 20 is provided. As shown in FIGS. 2 and 3, each rapid descent stop device 20 attaches at least one brake 30 and a traction shaft 22 to the upper ends of the guide rails 130 (refer to FIG. 7) of the pair of gate posts 13 via a fixed seat 21. The traction shaft 22 is interlocked with the lifting and lowering operation of the pair of shutter gates 11.

[0017] Refer to FIGS. 3 to 6. As shown in FIGS. 3 to 6, the brake 30 includes a ratchet rotation group 40 and a ratchet seat 50.

[0018] The ratchet rotation group 40 is located on a support seat 42 provided on the face edge of the first rotating disc 41. The support seat 42 is formed through the first rotating disc 41 in its central part and has a pivot shaft hole 420 to which the traction shaft 22 is attached, and at least one crescent-shaped pawl housing space 421 is formed between the support seat 42 and the first rotating disc 41. A banana-shaped ratchet member 43 is provided on each pawl housing space 421. The balance weight body 430 of each ratchet member 43 has a pivot hole 431 at one end and a ratchet portion 432 at the other end. A limiting portion 433 is provided on one side of the body portion of the balance weight body 430. The pivot 44 is pivotally attached to the first rotating disc 41 via the pivot hole 431. The ratchet portion 432 has a corner notch 434 on the opposite side of the pivot hole 431 of the balance weight body 430 to form an engaging end face 435. The limiting portion 433 has an elastic member 436 that acts on the support seat 42, and under normal conditions, it restricts the ratchet portion 432 and the engaging end face 435 from extending beyond the periphery of the first rotating disc 41.

[0019] The ratchet seat 50 is fixed on the fixed seat 21 and has a ratchet hole 51 that is formed to penetrate the first rotating disc 41, corresponding to the center of the ratchet rotation group 40 and surrounding the periphery. Multiple arc-shaped notches 52 that accommodate the balance weight body 430 of the ratchet member 43 are arranged in an annular shape along the radial direction of the wall of the ratchet hole 51 to form multiple ratchet teeth 53. Each ratchet tooth 53 has a stopper surface 54.

[0020] Refer to Figure 7. As shown in Figure 7, under normal conditions, a set of shutter gates 11 of the electric gate 10 slowly rise or fall (open or close) along the guide rails 130 of a pair of gateposts 13 by an electric motor 12 (not shown). In this case, as shown in Figures 7 and 8, the traction shaft 22 of the rapid descent stop device 20 is linked to the raising or lowering operation of the pair of shutter gates 11, and the ratchet rotation group 40 of the brake 30 rotates normally in accordance with the rotational speed of the traction shaft 22. As a result, the centrifugal force generated by swinging the balance weight body 430 of the ratchet member 43 (see Figure 6) remains within the strong limiting capacity of the elastic member 436, preventing the ratchet portion 432 of the ratchet member 43 from swinging beyond the periphery of the first rotating disc 41 and coming into contact with or colliding with the ratchet teeth 53 of the ratchet seat 50, and allowing the pair of shutter gates 11 to open or close normally without interference from the brake 30. However, when the electric motor 12 (see Figure 1) raises or lowers the shutter gate 11 along the guide rail 130 of the gate post 13, if the transmission mechanism fails (for example, if the gears of the motor case are damaged or the transmission chain breaks) and control is lost, the kinetic energy of the free fall of one set of shutter gates 11 is transmitted to the traction shaft 22 of the rapid descent stop device 20, causing the ratchet rotation group 40 to instantaneously accelerate and rotate. As shown in Figures 6 and 9, when the centrifugal force generated by the swinging of the balance weight body 430 of the ratchet member 43 is greater than the limiting elasticity of the elastic member 436, the engaging end face 435 of the ratchet portion 432 of the ratchet member 43 swings, engaging with the periphery of the first rotating disc 41 and one of the stopper faces 54 of the ratchet teeth 53 of the ratchet seat 50, preventing rotation. As a result, the pair of shutter gates 11 (see Figure 7) in the process of rapid descent immediately stops its rapid descent motion because the interlocking traction shaft 22 does not rotate. Therefore, in terms of the overall structural design, as shown in Figure 7, it is possible to effectively prevent the shutter gates 11 from inadvertently descending rapidly when opening or closing the pair of shutter gates 11.

[0021] In the above-described embodiment, preferably as shown in Figures 5 and 6, the support seat 42 has an insertion hole 422 formed corresponding to the limiting portion 433 of the ratchet member 43. The limiting portion 433 has a screw hole 437 into which a screw 438 (preferably a set screw) is screwed. The elastic member 436 is a compression spring, with one end inserted into the insertion hole 422 and the other end inserted into the screw hole 437 and in contact with the screw 438. By adjusting the depth of the screw 438 screwed into the screw hole 437, the timing of the ratchet member 43 swinging the balance weight body 430 can be changed by the compressive repulsive force of the elastic member 436, and this can be adjusted or set by the screw 438.

[0022] In the above-described embodiment, preferably as shown in Figures 4 to 6, a pair of pawl housing spaces 421 are formed between the support seat 42 of the ratchet rotation group 40 and the first rotating disc 41. The pair of pawl housing spaces 421 have a pair of ratchet members 43. The pair of ratchet members 43 are pivotally attached to the first rotating disc 41 via a pivot 44. The balance weight body 430 of each ratchet member 43 has a shaft 45 near the ratchet portion 432. One end of each shaft 45 is inserted through a pair of oval holes 410 in the first rotating disc 41 and pivotally attached to a pair of connecting rods 46. The other ends of the pair of connecting rods 46 are pivotally attached to both ends of a synchronous interlocking member 47. A bearing hole 470 is formed in the center of the synchronous interlocking member 47 for mounting a bearing 471 that rotates freely on the traction shaft 22. Refer to Figure 9. As shown in Figure 9, when the ratchet portion 432 of one of the pair of ratchet members 43 is swung around the first rotating disc 41, the connecting rod 46 pulls and rotates the synchronous interlocking member 47, and the other connecting rod 46 pushes the ratchet portion 432 of the other ratchet member 43, causing it to swing around the first rotating disc 41, so that the ratchet portions 432 of the pair of ratchet members 43 swing synchronously on the pair of pawl housing spaces 421. As shown in Figures 4 to 6, the support seat 42 described above is provided with a second rotating disc 41A on a different surface from the first rotating disc 41. The second turntable 41A has the same structure and shape as the first turntable 41, and has a pair of oval holes 410 through which a pair of ratchet members 43 are pivotally attached, and through which a shaft 45 is inserted to pivotally attach the other pair of connecting rods 46. The other ends of the other pair of connecting rods 46 are pivotally attached to both ends of the other synchronous interlocking member 47, and a bearing hole 470 is formed in the center of the other synchronous interlocking member 47 for attaching a bearing 471 that rotates freely on the traction shaft 22. Pivot shafts 48 are provided at both ends of the pair of synchronous interlocking members 47 to interlock. A pivot 44 is pivotally attached together to the first turntable 41 and the second turntable 41A on the pivot hole 431 of the pair of ratchet members 43, allowing the ratchet members 43 to swing and obtain good support. Furthermore, a pair of connecting rods 46 are pivotally attached to both ends of the shaft 45 of a pair of ratchet members 43. A pair of pivot shafts 48 are pivotally attached to both ends of a pair of synchronous interlocking members 47 to create an interlocking mechanism, and the ratchet parts 432 of the pair of ratchet members 43 are synchronously swung to enhance stability.

[0023] In the embodiments described above, as selectively shown in Figures 1 to 3, the electric motor 12 of the electric gate 10 may wind up a set of shutter gates 11, which are configured by connecting each slat in series, using the door winding shaft 14, and raise and lower them along the guide rails 130 (see Figure 4) of a pair of gateposts 13. The fixed seat 21 of the rapid descent stop device 20 may be formed by attaching the brake 30 to a frame-shaped base on the side plate 150 of the case 15, and fixing the traction shaft 22 to the door winding shaft 14 and forming it as a part of the door winding shaft 14. As shown in Figures 3 and 4, the ratchet rotation group 40 of the brake 30 and the door winding shaft 14 may be rotated synchronously. As shown in Figures 2, 7, and 9, if the door winding shaft 14 becomes uncontrollable while winding up a set of shutter gates 11, the braker 30 can respond to the abnormally high rotational speed of the door winding shaft 14 by quickly activating the braking mechanism to stop the rotation of the traction shaft 22 and prevent the set of shutter gates 11 from rapidly descending.

[0024] In the embodiments described above, as selectively shown in Figures 10 to 13, one set of shutter gates 11A of the electric gate 10A may be pivotally attached to a set of folding gates formed on a lower door piece 111 to which one end of the upper door piece 110 on the upper door beam 17 is pivotally attached. An electric motor 12A drives at least one rope shaft 180 of a wheel axle 18 on the upper door beam 17. A pull cord 181 wound on each rope shaft 180 pulls rollers 112 provided on both sides of the lower door piece 111, causing them to rise and fall along the guide rails 130A of a pair of gate posts 13A. The fixed base 21A of each steep descent stop device 20A (preferably two steep descent stop devices 20A are evenly arranged above the gate posts 13A) attaches the braker 30 and the traction shaft 22A to a suspension base on the upper door beam 17 at the upper end of the pair of gate posts 13A. The towing shaft 22A is mounted on the pivot shaft hole 420 of the ratchet rotation group 40 of the braker 30, with a winding device 60 fixed to one end and a coil spring 70 attached to the other end. A string 61 is wound around the winding device 60. A lower door piece 111 is connected to the tensioned end of the string 61. The coil spring 70 is covered by a cover 80 that is coupled to the ratchet seat 50. The outer end of the coil spring 70 is restricted by a limiting member 81 provided on the cover 80, and the inner end is connected to the towing shaft 22A. Under normal conditions, as shown in Figures 14 and 16, when the lower door piece 111 of a pair of shutter gates 11A moves downward (see Figures 12 and 13), the cord 61 pulls and rotates the traction shaft 22A, generating a biasing force in the coil spring 70. When the lower door piece 111 of a pair of shutter gates 11A moves upward, the coil spring 70 releases the biasing force, rotating the traction shaft 22A, and the winding device 60 automatically winds up the cord 61 (see Figures 12, 13, 15, and 17). If control is lost while the pair of shutter gates 11A is open or while the lower door piece 111 is moving up, down, or closing (for example, if the pull cord 181 breaks), the kinetic energy generated by the sudden descent of the lower door piece 111 is transmitted to the traction shaft 22A via the cord 61, causing the ratchet rotation group 40 to rotate at high speed. The balance weight 430 of the ratchet member 43 immediately reacts to the braking mechanism generated by the swinging motion. Specifically, the string 61 restrains the downward movement of the lower door piece 111, preventing the set of shutter gates 11A from rapidly descending.Refer to Figures 11 to 13. A winding device 60 is fixed to one end of the traction shaft 22A described above. Brakes 30 are provided on the traction shaft 22A on both sides of the winding device 60, respectively, and fixed to the fixing seat 21A (preferably, at least one connecting member 31 is fixed between the two brakes 30 to connect and reinforce the structure), so that the winding device 60 is supported in a balanced manner between the two brakes 30. Coil springs 70 and limiting covers 80 are provided at both ends of the traction shaft 22A on both sides of the winding device 60 described above, and fixed to the ratchet seat 50 respectively (since the structure of both ends of the traction shaft 22A is the same, only the members of one end are shown in the drawings), and the biasing force of the coil springs 70 at both ends of the traction shaft 22A can enhance the winding performance of the winding device 60 in winding the cord 61.

[0025] Preferred embodiments of the present invention have been disclosed above in a manner that can be understood by those skilled in the art, but these do not limit the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention. Accordingly, the claims of the present invention should be interpreted broadly to include such changes and modifications. [Explanation of Symbols]

[0026] 10 Electric gate 10A Electric Gate 11. Shutter Gate 11A Shutter Gate 12 Electric motors 12A electric motor 13 gateposts 13A Gatepost 14 Door winding shaft 15 cases 17 Upper door beam 18 Wheel axle 20 Swoop stop device 20A swoop stop device 21 Fixed seat 21A Fixed seat 22 Traction axle 22A Traction shaft 30 Brake device 31 Connecting member 40 Ratchet Rotation Groups 41. The first rotating disc 41A Second rotating disc 42 Support seat 43 Ratchet component 44 Axis 45 shaft rod 46 Continuation 47 Synchronized interlocking member 48 Pivot axis 50 Ratchet Seat 51 ratchet holes 52 Arc notch 53 ratchet teeth 54 Stopper surface 60 Winder 61 String 70 Coil springs 80 Cover 81 Limited Edition Parts 110 Upper door piece 111 Lower door piece 112 Laura 130 Guide Rail 130A Guide Rail 150 Side plate 180 Rope axis 181 pull code 410 Oval hole 420 Pivot shaft hole 421 Claw storage space 422 Insertion hole 430 Balance Weight Body 431 Pivot hole 432 Ratchet section 433 Limited section 434 Square notch 435 Engagement end surface 436 Elastic members 437 Screw holes 438 screws 470 Bearing hole 471 Bearing

Claims

1. An electric shutter gate rapid descent stop device, which includes a set of electric shutter gates that move up and down along guide rails on a pair of gateposts using an electric motor, At least one steep drop stop device is provided above the pair of gateposts. Each steep drop stop device is attached to the upper end of the guide rail of a pair of gateposts via a fixed seat, and the traction shaft is linked to the raising and lowering operation of a set of shutter gates. The brake includes a ratchet rotating group and a ratchet seat, The ratchet rotating group is located on a support seat provided on the face edge of the first rotating disc, the support seat has a pivot shaft hole formed through the first rotating disc in its central part and to which the traction shaft is attached, and at least one pawl housing space is formed between it and the first rotating disc, each of the pawl housing spaces is provided with a banana-shaped ratchet member, each balance weight body of the ratchet member has a pivot hole at one end and a ratchet portion at the other end, one side of the body portion of the balance weight body is provided with a limiting portion, the pivot is pivotally attached to the first rotating disc via the pivot hole, the ratchet portion has a corner notch on the opposite side of the pivot hole of the balance weight body to form an engaging end face, the limiting portion has an elastic member that acts on the support seat and restricts the ratchet portion and the engaging end face from extending beyond the periphery of the first rotating disc under normal conditions. The ratchet seat is fixed on the fixed seat and has a ratchet hole formed to penetrate the first rotating disc so as to surround the periphery, corresponding to the center of the ratchet rotation group, and a plurality of arc-shaped notches for accommodating the balance weight body of the ratchet member are arranged in an annular shape in the radial direction of the wall of the ratchet hole to form a plurality of ratchet teeth, and each of the ratchet teeth has a stopper surface, characterized in that the rapid descent stop device for an electric shutter gate.

2. The support seat has an insertion hole formed corresponding to the limiting portion of the ratchet member, The aforementioned limiting portion has a screw hole for screwing in, The rapid descent stop device for an electric shutter gate according to claim 1, characterized in that the elastic member is a compression spring, with one end inserted into the insertion hole and the other end inserted into the screw hole and in contact with the screw.

3. A pair of pawl housing spaces is formed between the support seat of the ratchet rotation group and the first rotating disc. The pair of claw housing spaces have a pair of ratchet members, The pair of ratchet members are pivotally mounted on the first rotating disc via the pivot, The electric shutter gate rapid descent stop device according to claim 1, characterized in that each of the balance weight bodies of the ratchet member has a shaft near the ratchet portion, one end of each shaft is inserted through a pair of oval holes in the first rotating disc and pivotally attached to a pair of connecting rods, the other ends of the pair of connecting rods are pivotally attached to both ends of a synchronous interlocking member, and a bearing hole is formed in the center of the synchronous interlocking member for attaching a bearing that rotates freely on the traction shaft.

4. The support base is provided with a second rotating disc on a surface different from that of the first rotating disc. The electric shutter gate rapid descent stop device according to claim 3, wherein the second rotating disc has the same structure and shape as the first rotating disc, and has a pair of oval holes through which a pair of ratchet members are pivotally attached and through which the shaft is inserted to pivotally attach the other pair of connecting rods, the other ends of the other pair of connecting rods are pivotally attached to both ends of the other synchronous interlocking member, a bearing hole is formed in the center of the other synchronous interlocking member for attaching a bearing that rotates freely on the traction shaft, and pivot shafts are provided at both ends of the pair of two synchronous interlocking members to interlock.

5. The electric motor of the electric gate winds up a set of shutter gates, each slat connected in series, using a door winding shaft, and raises and lowers them along the guide rails of a pair of gate posts, and the fixed base of the rapid descent stop device is characterized in that the brake is attached to a frame-shaped base on the side plate of the case, and the traction shaft is fixed to the door winding shaft and formed into a part of the door winding shaft, as described in any one of claims 1 to 4.

6. One set of shutter gates of the aforementioned electric gate is a set of folding gates in which a lower door piece is pivotally attached to one end of an upper door piece that is pivotally attached to an upper door beam, The electric motor drives at least one rope shaft of the wheel axle on the upper door beam, and the pull cord wound on each rope shaft pulls rollers provided on both sides of the lower door piece, causing it to rise and fall along the guide rails of the pair of gate posts, and the fixed seat of each steep descent stop device attaches the brake and the traction shaft to the suspension base on the upper door beam at the upper end of the pair of gate posts, the traction shaft is assembled on the pivot shaft hole of the ratchet rotation group of the brake, a winding device is fixed to one end and the coil spring is provided to the other end, a string is wound on the winding device, and the lower door piece is connected to the tensile end of the string, The rapid descent stop device for an electric shutter gate according to any one of claims 1 to 4, characterized in that the coil spring is covered by a cover coupled to the ratchet seat, the outer end of the coil spring is limited by a limiting member provided on the cover, and the inner end is connected to the traction shaft.

7. The winding device is fixed to one end of the aforementioned traction shaft. The electric shutter gate rapid descent stopping device according to claim 6, characterized in that the brakes fixed to the fixed seat are provided correspondingly on the traction shafts on both sides of the winding device.

8. The electric shutter gate rapid descent stop device according to claim 7, characterized in that coil springs and limiting covers are provided at both ends of the traction shaft on both sides of the winding device, and are fixed to the ratchet seat, respectively.

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