Structure of sudden drop stop device for electric shutter / gate

Abstract

To provide a sudden descent stop device structure for an electric shutter gate, which prevents the shutter gate from suddenly descent even if control is lost when the shutter gate is opened or raised / lowered. [Solution] The sudden drop stop device structure for an electric shutter / gate includes a set of shutters / gates 11 of an electric gate 10 that rises and falls along a guide rail 130 of a pair of gate posts 13 by an electric motor. At least one sudden drop stop device 20 is provided above the pair of gate posts. Each sudden drop stop device has at least one brake 30 and a traction shaft 22 attached to the upper end of the guide rail of the pair of gate posts via a fixed seat. The traction shaft 22 is linked to the rising and lowering movement of the set of shutters / 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 end of a first rotating disk. The support seat has a pivot shaft hole formed in the center thereof that penetrates the first rotating disk and to which the traction shaft is attached.

Description

[Technical field]

[0001] This invention relates to a sudden descent stop device structure for an electric shutter gate, which prevents the shutter gate from suddenly descent even if control is lost when opening or raising or lowering the shutter gate. [Background technology]

[0002] An electric shutter gate uses the power of an electric motor to raise and lower the shutter gate along the guide rail of the gatepost, opening and closing the folding gate. For example, in the case of an electric shutter, the motor drives the winding shaft inside the case, and the series-connected retractable shutter slats are wound up along the guide rail of the gatepost. For example, in the case of an electric folding gate, when the motor winds up the pull cord with the cord roller on the roller shaft, the pull cord causes the rollers on both sides of the lower door piece of the folding gate to rise and fall along the guide rail of the gatepost. Whether it is an electric shutter or an electric folding gate, the motor that drives the shutter gate is provided with a speed change mechanism or a reduction mechanism so that the control of the raising and lowering speed of the shutter gate is not lost. However, these mechanisms can be damaged or broken down due to aging or fatigue after long-term use. When the gear teeth of the transmission case of a retracting or pulling shutter gate are crushed or the chain or pull cord breaks, the motor of an open shutter gate or a rising or falling shutter gate can lose control and suddenly fall, posing a risk of injury to the user unless the braking mechanism is intervened in a timely manner.

[0003] In view of this situation, the inventor of the present invention has utilized his many years of experience and knowledge in manufacturing and design in related fields to come up with various innovative ideas to complete the present invention. Summary of the Invention [Problem to be solved by the invention]

[0004] The main objective of this invention is to provide a sudden descent prevention device structure for an electric shutter gate, which prevents the shutter gate from suddenly descent even if control is lost when opening or raising / lowering the shutter gate. [Means for solving the problem]

[0005] In order to solve the above problems, according to a first aspect of the present invention, there is provided a sudden descent stop device structure for an electric shutter / gate, including a pair of shutter / gates that are raised and lowered along a guide rail of a pair of gateposts by an electric motor, wherein at least one sudden descent stop device is provided above the pair of gateposts, and each sudden descent stop device has at least one brake and a traction shaft attached to the upper end of the guide rail of the pair of gateposts via a fixed seat, and the traction shaft is linked to the raising and lowering operation of the pair of shutter / gates, and the brake includes a ratchet rotating group and a ratchet seat, and the ratchet rotating group is located on a support seat provided on the surface end of a first rotating disk, and the support seat has a pivot shaft hole formed through the first rotating disk at the center and to which the traction shaft is attached, and at least one pawl accommodating space is formed between the first rotating disk and the support seat, and a banana-shaped ratchet member is provided on each of the pawl accommodating spaces, and a balance of each ratchet member is provided. a balance weight body having a pivot hole at one end and a ratchet portion at the other end, a limiting portion provided on one side of a body portion of the balance weight body, a pivot shaft pivotally mounted on the first rotating plate through the pivot hole, the ratchet portion having a square notch on the opposite side of the pivot hole of the balance weight body to form an engagement end surface, the limiting portion having an elastic member acting on the support seat and restricting the ratchet portion and the engagement end surface from moving beyond the periphery of the first rotating plate in a normal state, the ratchet seat being fixedly mounted on the fixed seat and having a ratchet hole corresponding to the center of the ratchet rotation group and formed through the first rotating plate to surround the periphery, a plurality of arc-shaped notches accommodating the balance weight body of the ratchet member are arranged in an annular shape in the hole wall radial direction of the ratchet hole to form a plurality of ratchet teeth, and each of the ratchet teeth has a stopper surface.

[0006] It is preferable that the support seat has an insertion hole formed to correspond to the limiting portion of the ratchet member, the limiting portion has a threaded hole into which a screw is screwed, and the elastic member is a compression spring, one end of which is inserted into the insertion hole and the other end of which is inserted into the threaded hole to abut against the screw.

[0007] It is preferable that a pair of the pawl accommodating spaces are formed between the support seat of the ratchet rotating group and the first rotating plate, each of the pair of the pawl accommodating spaces has a pair of the ratchet members, the pair of the ratchet members are pivotally mounted on the first rotating plate via the pivot shaft, the balance weight body of each of the ratchet members has an axial rod at a location close to the ratchet portion, one end of each of the axial rods is inserted into a pair of oval holes in the first rotating plate 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] A second rotating plate is provided on a surface different from that of the first rotating plate on the support seat, the second rotating plate having the same structure and shape as the first rotating plate, a pair of the ratchet members pivotally attached, a pair of the oblong holes through which the shaft rod is inserted and the other pair of the connecting rods are pivotally attached, the other ends of the other pair of the 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 mounting a bearing that rotates freely on the traction shaft, and it is preferable that a pivot shaft is provided at both ends of the pair of two synchronous interlocking members so as to be interlocked.

[0009] The electric motor of the electric gate winds up a set of shutter gates, each of which has its slats connected in series, using a door winding shaft and raises and lowers it along the guide rails of a pair of the gate posts, and it is preferable that the fixed seat of the sudden descent stop device is formed as part of the door winding shaft by attaching the brake to a frame-shaped base on the side panel of the case and fixing the traction shaft to 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 pivoted on an upper door beam, the electric motor drives at least one rope shaft of a wheel axle on the upper door beam, a pull cord wound on each of the rope shafts pulls rollers provided on both sides of the lower door piece, and raises and lowers the lower door piece along the guide rails of a pair of the gate posts, and the fixed seat of each sudden descent stop device connects the brake and the traction shaft to the pair of the gate posts. It is preferable that the upper end of the coil spring is attached to a hanging base on the upper door beam, the traction shaft is assembled onto the pivot shaft hole of the ratchet rotating group of the brake, a winder is fixed to one end, the coil spring is provided on the other end, a string is wound around the winder, the lower door piece is connected to the pulling end of the string, the coil spring is covered by a cover that is connected to the ratchet seat, and the coil spring has an outer end limited by a limiting member provided on the cover and an inner end connected to the traction shaft.

[0011] It is preferable that the winder is fixed to one end of the traction shaft, and the brakes fixed to the fixed seats are provided on the traction shaft on both sides of the winder so as to correspond to each other.

[0012] It is preferable that a coil spring and a limiting cover are provided on both ends of the traction shaft on both sides of the winder, and are fixed onto the ratchet seats. Effect of the Invention

[0013] The sudden drop prevention device structure of the electric shutter gate of the present invention can prevent the shutter gate from suddenly dropping even if the shutter gate loses control when opening or raising or lowering. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing a state in which a sudden descent stopping device structure for an electric shutter / gate according to one embodiment of the present invention is used in a shutter lifting transmission structure. [Diagram 2]FIG. 2 is an exploded perspective view showing a state in which a sudden descent stopping device structure for an electric shutter / gate according to one embodiment of the present invention is attached to the top of a gatepost. [Diagram 3] FIG. 3 is an exploded perspective view showing the structure of a sudden descent stopping device structure for an electric shutter / gate according to one embodiment of the present invention. [Figure 4] FIG. 4 is an exploded perspective view showing a brake of a sudden descent stopping device structure of an electric shutter / gate according to one embodiment of the present invention. [Diagram 5] FIG. 5 is an exploded perspective view showing the structure of a ratchet rotation group of a sudden descent stopping device structure for an electric shutter / gate according to one embodiment of the present invention. [Figure 6] FIG. 6 is a plan view of a state in which a second rotating disk is not provided on the brake of the sudden descent stopping device structure for an electric shutter / gate according to one embodiment of the present invention. [Figure 7] FIG. 7 is an explanatory diagram of a state in which the shutter of the electric shutter / gate sudden descent stopping device structure according to one embodiment of the present invention loses control. [Figure 8] FIG. 8 is an enlarged view of part A in FIG. [Figure 9] FIG. 9 is an enlarged view of part A in FIG. 7 when the shutter of the electric shutter / gate dive stop device structure according to one embodiment of the present invention loses control. [Figure 10] FIG. 10 is a perspective view showing the state in which the electric shutter / gate sudden descent stopping device structure according to another embodiment of the present invention is used in an electric folding gate. [Figure 11] FIG. 11 is a perspective view showing the structure of a sudden descent stopping device structure for an electric shutter / gate according to another embodiment of the present invention. [Figure 12] FIG. 12 is an exploded perspective view showing the structure of a sudden descent stopping device structure for an electric shutter / gate according to another embodiment of the present invention. [Figure 13] FIG. 13 is an exploded perspective view showing a coil spring of a sudden descent stopping device structure for an electric shutter / gate according to another embodiment of the present invention. [Figure 14]FIG. 14 is an explanatory diagram showing a state in which the gate of the electric shutter gate according to another embodiment of the present invention is not out of control. [Figure 15] FIG. 15 is an explanatory diagram showing a state in which 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 in FIG. [Figure 17] FIG. 17 is an enlarged view of part C in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] In order to more completely and clearly disclose the technical means of the present invention and the effects achievable thereby, the present invention will be described in detail below in conjunction with the accompanying drawings and symbols disclosed.

[0016] Please refer to Figures 1 and 2. As shown in Figures 1 and 2, the sudden drop stop device structure of an electric shutter / gate according to one embodiment of the present invention includes a pair of shutter / gates 11 of an electric gate 10, which is raised and lowered along a guide rail 130 (see Figure 7) of a pair of gate posts 13 by an electric motor 12. At least one sudden drop stop device 20 is provided above the pair of gate posts 13. As shown in Figures 2 and 3, each sudden drop stop device 20 has at least one brake 30 and a traction shaft 22 attached to the upper end of the guide rail 130 (see Figure 7) of the pair of gate posts 13 via a fixed seat 21. The traction shaft 22 is linked to the raising and lowering operation of the pair of shutter / gates 11.

[0017] Please refer to Figures 3 to 6. As shown in Figures 3 to 6, the brake 30 includes a ratchet rotating group 40 and a ratchet seat 50.

[0018] The ratchet rotating group 40 is located on a support seat 42 provided on the surface end of the first rotating disk 41. The support seat 42 has a pivot shaft hole 420 formed in the center thereof through the first rotating disk 41 and to which the traction shaft 22 is attached, and at least one crescent-shaped pawl accommodating space 421 is formed between the support seat 42 and the first rotating disk 41. A banana-shaped ratchet member 43 is provided on each pawl accommodating space 421. The balance weight body 430 of each ratchet member 43 has a pivot hole 431 formed on one end and a ratchet portion 432 formed on the other end. A limiting portion 433 is provided on one side of the body portion of the balance weight body 430. The pivot shaft 44 is pivotally attached on the first rotating disk 41 through 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 engagement end surface 435. The limiting portion 433 has an elastic member 436 acting on the support seat 42 to limit the ratchet portion 432 and the engagement end surface 435 from exceeding the periphery of the first rotating disk 41 in the normal state.

[0019] The ratchet seat 50 is fixed on the fixed seat 21, corresponds to the center of the ratchet rotary group 40, and has a ratchet hole 51 formed through the first rotary disk 41 so as to surround the periphery thereof. A plurality of arc-shaped notches 52 for accommodating the balance weight body 430 of the ratchet member 43 are arranged in an annular shape in the radial direction of the hole wall of the ratchet hole 51 to form a plurality of ratchet teeth 53. Each ratchet tooth 53 has a stopper surface 54.

[0020] Please refer to Fig. 7. As shown in Fig. 7, under normal conditions, a pair of shutter gates 11 of an electric gate 10 slowly rises or falls (opens or closes) along guide rails 130 of a pair of gate posts 13 by an electric motor 12 (not shown). At this time, as shown in Figures 7 and 8, the traction shaft 22 of the sudden descent stop device 20 is linked to the raising or lowering operation of the set of shutter gates 11, and the ratchet rotating group 40 of the brake 30 rotates normally in accordance with the rotation speed of the traction shaft 22. Therefore, the centrifugal force (see Figure 6) generated by swinging the balance weight body 430 of the ratchet member 43 is still within the range of the strong limiting capacity of the elastic member 436, and prevents the ratchet portion 432 of the ratchet member 43 from swinging beyond the periphery of the first rotating disk 41 and coming into contact or colliding with the ratchet teeth 53 of the ratchet seat 50, so that the set of shutter gates 11 can normally open or close without being interfered with by the brake 30. However, if the transmission mechanism fails (for example, if the gears of the motor case break or the transmission chain breaks) and control is lost when the electric motor 12 (see FIG. 1) raises or lowers the shutter-gate 11 along the guide rail 130 of the gate post 13, the kinetic energy of the free fall of one set of shutter-gates 11 is transmitted to the traction shaft 22 of the sudden drop stop device 20, causing the ratchet rotating group 40 to instantaneously accelerate and rotate. 6 and 9, under the condition that the centrifugal force generated by the swinging of the balance weight body 430 of the ratchet member 43 is larger than the limiting elasticity of the elastic member 436, the engaging end surface 435 of the ratchet portion 432 of the ratchet member 43 swings and engages with the periphery of the first rotating disk 41 and the stopper surface 54 of one of the ratchet teeth 53 of the ratchet seat 50, preventing the pair of shutter gates 11 (see FIG. 7) that is suddenly descending will immediately stop the sudden descent because the associated traction shaft 22 will not rotate. Therefore, in terms of the overall structural design, as shown in FIG. 7, it is possible to effectively prevent the pair of shutter gates 11 from suddenly descending when opening or closing them.

[0021] In the above-described embodiment, as shown in Fig. 5 and Fig. 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, one end of which is inserted into the insertion hole 422 and the other end of which is inserted into the screw hole 437 to abut against the screw 438. By adjusting the depth of the screw 438 screwed into the screw hole 437, the timing of swinging the balance weight body 430 of the ratchet member 43 by the compression repulsion force of the elastic member 436 can be changed, and the adjustment can be set by the screw 438.

[0022] In the above-mentioned embodiment, preferably as shown in Figs. 4 to 6, a pair of pawl accommodating spaces 421 are formed between the support seat 42 of the ratchet rotary group 40 and the first rotary disk 41. The pair of pawl accommodating spaces 421 have a pair of ratchet members 43. The pair of ratchet members 43 are pivotally mounted on the first rotary disk 41 via a pivot 44. The balance weight body 430 of each ratchet member 43 has a shaft rod 45 at a location close to the ratchet portion 432. One end of each shaft rod 45 is inserted into a pair of oval holes 410 of the first rotary disk 41 and pivotally mounted to a pair of connecting rods 46. The other ends of the pair of connecting rods 46 are pivotally mounted to both ends of the synchronous interlocking member 47. A bearing hole 470 is formed in the center of the synchronous interlocking member 47 to mount a bearing 471 that rotates freely on the traction shaft 22. Please refer to Fig. 9. 9, when the ratchet portion 432 of one of the pair of ratchet members 43 is swung around the first rotating plate 41, the synchronous interlocking member 47 is pulled and rotated by the connecting rod 46, and the ratchet portion 432 of the other ratchet member 43 is pushed by the other connecting rod 46 and swung around the first rotating plate 41, so that the ratchet portions 432 of the pair of ratchet members 43 are swung synchronously above the pair of pawl accommodating spaces 421. As shown in FIGS. 4 to 6, a second rotating plate 41A is provided on a surface different from that of the first rotating plate 41 in the support seat 42 described above. The second rotating disk 41A has the same structure and shape as the first rotating disk 41, and has a pair of oblong holes 410 to which the pair of ratchet members 43 are pivotally attached and through which the shaft rod 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 to mount a bearing 471 that rotates freely on the traction shaft 22. A pivot shaft 48 is provided at both ends of the pair of two synchronous interlocking members 47 to interlock with each other. A pivot shaft 44 is pivotally attached to the first rotating disk 41 and the second rotating disk 41A together on the pivot hole 431 of the pair of ratchet members 43 to swing the ratchet members 43 and obtain good support. A pair of connecting rods 46 are pivotally attached to both ends of the shaft rod 45 of the pair of ratchet members 43. A pair of pivot shafts 48 are pivotally attached to both ends of the pair of synchronous interlocking members 47, respectively, to interlock the ratchet portions 432 of the pair of ratchet members 43 in synchronous motion, thereby improving stability.

[0023] In the above-mentioned embodiment, as shown in Fig. 1 to Fig. 3, the electric motor 12 of the electric gate 10 may wind up a set of shutter gates 11, each of which is formed by connecting slats in series, by the door winding shaft 14, and raise and lower the set along the guide rails 130 (see Fig. 4) of a pair of gate posts 13. The fixed seat 21 of the dive stop device 20 may be formed as a part of the door winding shaft 14 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. As shown in Fig. 3 and Fig. 4, the ratchet rotating group 40 of the brake 30 and the door winding shaft 14 may be rotated synchronously. As shown in Figures 2, 7 and 9, when the door winding shaft 14 goes out of control while winding up the pair of shutter gates 11, the brake 30 can respond to the abnormally high rotation speed of the door winding shaft 14 and quickly activate the braking mechanism to stop the rotation of the traction shaft 22, thereby preventing the pair of shutter gates 11 from plummeting.

[0024] In the above-mentioned embodiment, as shown in Figs. 10 to 13, a 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 an upper door piece 110 on an 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 around each rope shaft 180 pulls a roller 112 provided on both sides of the lower door piece 111, and moves it up and down along a guide rail 130A of a pair of gate posts 13A. A fixed seat 21A of each sudden descent stopping device 20A (two sudden descent stopping devices 20A are preferably evenly arranged above the gate posts 13A) has a brake 30 and a traction shaft 22A attached to a hanging base on the upper door beam 17 at the upper end of the pair of gate posts 13A. The traction shaft 22A is assembled onto the pivot hole 420 of the ratchet rotating group 40 of the brake 30, with a winder 60 fixed to one end and a coil spring 70 attached to the other end. A string 61 is wound around the winder 60. A lower door piece 111 is connected to the pulling end of the string 61. The coil spring 70 is covered by a cover 80 which is coupled to the ratchet seat 50. The outer end of the coil spring 70 is limited by a limiting member 81 provided on the cover 80, and the inner end is connected onto the traction shaft 22A. In a normal state, as shown in Figures 14 and 16, when the lower door piece 111 of one shutter gate set 11A performs a downward movement (see Figures 12 and 13), the string 61 pulls and rotates the traction shaft 22A, generating a biasing force in the coil spring 70. When the lower door piece 111 of one shutter gate set 11A performs a upward movement, the coil spring 70 releases the biasing force, causing the traction shaft 22A to rotate, and the string 61 is automatically wound up by the winder 60 (see Figures 12, 13, 15 and 17). If control is lost when the one shutter gate set 11A is open or when the lower door piece 111 is ascending or descending or closing (for example, if the pull cord 181 breaks), the kinetic energy generated by the lower door piece 111 suddenly descending is transmitted to the traction shaft 22A via the string 61, causing the ratchet rotation group 40 to rotate at high speed. The balance weight body 430 of the ratchet member 43 immediately responds to the braking mechanism generated by the swinging. That is, the string body 61 restrains the lower door piece 111 from descending, and prevents the pair of shutter gates 11A from suddenly descending.Please refer to Figures 11 to 13. A winder 60 is fixed to one end of the above-mentioned traction shaft 22A. Brakes 30 fixed to the fixed seats 21A are provided on the traction shafts 22A on both sides of the winder 60, respectively (preferably, at least one connecting member 31 is fixed between the two brakes 30 to connect and strengthen the structure), and the winder 60 is supported in a well-balanced manner between the two brakes 30. A coil spring 70 and a limiting cover 80 are provided on both ends of the traction shafts 22A on both sides of the above-mentioned winder 60, respectively, and fixed on the ratchet seats 50 (the traction shaft 22A has the same structure at both ends, so only the members at one end are shown in the drawings), and the performance of the winder 60 winding up the string 61 can be improved at both ends of the traction shaft 22A by the biasing force of the coil spring 70.

[0025] The preferred embodiments of the present invention have been disclosed above so that those skilled in the art can understand, but they are not intended to limit the present invention. Various changes and modifications can be made within the scope of the present invention. Therefore, the scope of the utility model registration claims of the present invention should be broadly interpreted to include such changes and modifications. [Explanation of symbols]

[0026] 10 Electric Gate 10A Electric Gate 11. Shutter Gate 11A Shutter Gate 12 Electric motor 12A electric motor 13 Gatepost 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 members 40 Ratchet Rotation Group 41 First Turntable 41A Second Turntable 42 Support seat 43 Ratchet member 44 Axis 45 shaft rod 46 Continuation 47 Synchronous interlocking parts 48 Pivot axis 50 Ratchet seat 51 Ratchet hole 52 Arc notch 53 ratchet teeth 54 Stopper surface 60 Winder 61 String 70 Coil spring 80 Cover 81 Limited parts 110 Upper door piece 111 Lower door piece 112 Lola 130 Guide rail 130A Guide rail 150 Side plate 180 Rope shaft 181 Pull Cord 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 Corner notch 435 Engagement end surface 436 Elastic Members 437 Screw hole 438 Screw 470 Bearing hole 471 Bearings

Claims

1. A sudden drop stop device structure for an electric shutter gate, comprising a pair of shutter gates that are raised and lowered by an electric motor along a pair of guide rails of gate posts, At least one sudden drop stop device is provided above the pair of gateposts; Each of the dive stop devices is provided with at least one brake and a traction shaft attached to the upper ends of the guide rails of a pair of the gate posts via a fixed seat, and the traction shaft is linked to the lifting and lowering operation of a pair of shutter gates; The brake includes a ratchet rotor and a ratchet seat, The ratchet rotating group is located on a support seat provided on a surface end of a first rotating plate, the support seat has a pivot hole formed in the center of the first rotating plate and the traction shaft is attached to the pivot hole, and at least one pawl accommodating space is formed between the support seat and the first rotating plate, and a banana-shaped ratchet member is provided on each of the pawl accommodating spaces, and the balance weight body of each of the ratchet members has a pivot hole formed on one end and a ratchet part formed on the other end, and a limiting part is provided on one side of the body part of the balance weight body, and the pivot is pivoted on the first rotating plate through the pivot hole, and the ratchet part has a corner notch on the opposite side of the pivot hole of the balance weight body to form an engagement end surface, and the limiting part has an elastic member acting on the support seat, and restricts the ratchet part and the engagement end surface from going beyond the periphery of the first rotating plate in a normal state, The ratchet seat is fixed on the fixed seat, corresponds to the center of the ratchet rotating group, and has a ratchet hole formed through the ratchet seat to surround the periphery of the first rotating disk, and a plurality of arc-shaped notches that accommodate the balance weight body of the ratchet member are arranged in a circular ring 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.

2. The support seat has an insertion hole formed in correspondence with the limiting portion of the ratchet member, The limiting portion has a screw hole into which a screw is screwed, 2. The structure of a sudden descent stop device for an electric shutter / gate as described in claim 1, wherein the elastic member is a compression spring, one end of which is inserted into the insertion hole and the other end of which is inserted into the screw hole and abuts against the screw.

3. A pair of pawl accommodating spaces are formed between the support seat of the ratchet rotary group and the first rotary disk, The pair of pawl accommodating spaces each have a pair of the ratchet members, The pair of ratchet members are pivotally mounted on the first rotating disk via the pivot shaft, The balance weight body of each of the ratchet members has an axial rod near the ratchet portion, one end of each of the axial rods is inserted into a pair of oblong holes in the first rotating disk 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 mounting a bearing that rotates freely on the traction shaft.

4. a second rotating disk is provided on a surface of the support seat different from that of the first rotating disk; The second rotating disk has the same structure and shape as the first rotating disk, has a pair of oblong holes to which a pair of the ratchet members are pivotally attached and through which the shaft rod is inserted to pivotally attach the other pair of the connecting rods, the other ends of the other pair of the connecting rods are pivotally attached to both ends of the other synchronous interlocking member, the bearing hole is formed in the center of the other synchronous interlocking member to mount a bearing that rotates freely on the traction shaft, and the pair of two synchronous interlocking members are each provided with a pivot shaft at both ends to be interlocked.

5. The electric motor of the electric gate winds up a set of shutter gates, each of which has its slats connected in series, using a door winding shaft to raise and lower the set along the guide rails of the pair of gate posts, and the fixed seat of the sudden descent stop device is configured so that the brake is attached to a frame-shaped base on the side panel of the case, and the traction shaft is fixed to the door winding shaft to be molded into part of the door winding shaft.

6. 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 the wheel axle on the upper door beam, and the pull cord wound on each of the rope shafts pulls the rollers provided on both sides of the lower door piece, raising and lowering it along the guide rails of the pair of gate posts, and the fixed seat of each sudden descent stop device attaches the brake and the traction shaft to a hanging base on the upper door beam at the upper end of the pair of gate posts, and the traction shaft is assembled on the pivot shaft hole of the ratchet rotating group of the brake, a winder is fixed to one end and the coil spring is provided at the other end, a string is wound around the winder, and the lower door piece is connected to the pulling end of the string, The coil spring is covered by a cover that is connected to the ratchet seat, and the coil spring has an outer end that is limited by a limiting member provided on the cover and an inner end that is connected to the traction shaft.

7. The winder is fixed to one end of the traction shaft, 7. The sudden descent stopping device structure for an electric shutter / gate according to claim 6, wherein the brakes fixed to the fixing seats are provided on the traction shafts on both sides of the winder in a corresponding manner.

8. The sudden descent stop device structure for an electric shutter / gate as described in claim 7, characterized in that a coil spring and a limiting cover are provided on both ends of the traction shaft on both sides of the winder, and are fixed onto the ratchet seat, respectively.

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