Sudden drop stop device for electric shutters and gates

Abstract

To provide a sudden descent stop device for an electric shutter gate, which prevents the shutter gate from suddenly descent even if control is lost. [Solution] The sudden drop stopping device for an 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 sudden drop stopping device has at least one brake (30) and a traction shaft (22) attached to the upper end of the guide rail of a pair of gateposts via a fixed seat. The traction shaft (22) is linked to the lifting and lowering movement of a pair 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 the first turntable. The support seat has a pivot shaft hole formed in the center that penetrates the first turntable and to which the traction shaft is attached.

Description

[Technical Field]

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

[0002] Electric shutter gates use the power of an electric motor to raise and lower the shutter gate along the guide rails of the gatepost, opening and closing the folding gate. For example, in an electric shutter, a motor drives a winding shaft inside the case, winding retractable shutter slats connected in series along the guide rails of the gatepost. For example, in the case of an electric folding gate, the motor winds a pull cord through a cord roller on the roller shaft, which causes rollers on both sides of the folding gate's lower door piece to rise and fall along the guide rails of the gatepost. Whether it's an electric shutter or an electric folding gate, the motor that drives the shutter gate is equipped with a speed change or reduction mechanism to ensure control of the shutter gate's raising and lowering speed. However, these mechanisms can become damaged or malfunction due to aging or fatigue after prolonged 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 shutter gate in an open state or while being raised or lowered can lose control of the motor and suddenly fall, potentially resulting in injury to the user if the braking mechanism is not intervened in a timely manner.

[0003] In view of this situation, the inventor has made various efforts based on his many years of experience and knowledge in manufacturing and design in the related fields, and has completed the present invention. Summary of the Invention [Problem to be solved by the invention]

[0004] The main object of the present invention is to provide a sudden descent prevention device for an electric shutter gate, which prevents the shutter gate from suddenly dropping even if control is lost when opening or raising or 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 stopping device for an electric shutter gate, which includes a set of shutter gates that are raised and lowered along the guide rails of a pair of gateposts by an electric motor, and at least one sudden descent stopping device is provided above the pair of gateposts, and each sudden descent stopping 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 movement of the set 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 face end of a first turntable, and the support seat has a pivot shaft hole formed through the first turntable in the center and to which the traction shaft is attached, and at least one pawl accommodating space is formed between the first turntable and the support seat, and a banana-shaped ratchet member is provided above 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 on one side of a body portion of the balance weight body; a pivot shaft pivotally mounted on the first rotating disk via the pivot hole; the ratchet portion having a square notch on the side opposite the pivot hole of the balance weight body to form an engagement end surface; the limiting portion having an elastic member that acts on the support seat and restricts the ratchet portion and the engagement end surface from moving beyond the periphery of the first rotating disk in a normal state; the ratchet seat being fixed on the fixed seat and having a ratchet hole that corresponds to the center of the ratchet rotating group and penetrates to surround the periphery of the first rotating disk; a plurality of arc-shaped notches that accommodate 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.

[0006] It is preferable that the support seat has an insertion hole formed corresponding to the limiting portion of the ratchet member, the limiting portion has a threaded hole into which a screw is threaded, 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] A pair of pawl accommodating spaces are formed between the support seat of the ratchet rotating group and the first rotating disk, each of the pair of pawl accommodating spaces has a pair of ratchet members, and the pair of ratchet members is pivotally mounted on the first rotating disk via the pivot shaft, the balance weight body of each of the ratchet members has a shaft rod at a location close to the ratchet portion, one end of each shaft rod is inserted into a pair of oval holes in the first rotating disk 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 to mount a bearing that rotates freely on the traction shaft.

[0008] A second turntable is provided on a surface of the support seat different from that of the first turntable, and the second turntable has the same structure and shape as the first turntable, and has a pair of oblong holes to which a pair of the ratchet members are pivotally attached and through which the shaft rods are 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, and the bearing hole is formed in the center of the other synchronous interlocking member to attach a bearing that rotates freely on the traction shaft, and it is preferable that a pivot shaft is provided at each end of the pair of two synchronous interlocking members to interlock with each other.

[0009] The electric motor of the electric gate winds up a set of shutter gates, each of whose slats is connected in series, using a door winding shaft and moves the set up and down along the guide rails of the pair of gateposts, and it is preferable that the fixing seat of the sudden descent stop device is formed as a 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, and a pull cord wound on each of the rope shafts 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 the gateposts, and the fixed seat of each sudden descent stop device connects the brake and the traction shaft to a pair of the gateposts. 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 pulling end of the string is connected to the lower door piece, the coil spring is covered by a cover connected 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.

[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 respectively provided on the traction shaft on both sides of the winder.

[0012] Preferably, a coil spring and a restrictive cover are provided on both ends of the traction shaft on both sides of the winder, and are fixed onto the ratchet seats. [Effects of the Invention]

[0013] The sudden descent prevention device for an electric shutter gate of the present invention can prevent the shutter gate from suddenly descent even if control is lost when opening or raising or lowering the shutter gate. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing a state in which a sudden descent stopping device for an electric shutter / gate according to one embodiment of the present invention is used in a shutter lifting / lowering transmission structure. [Figure 2]FIG. 2 is an exploded perspective view showing a state in which a sudden descent stopping device for an electric shutter gate according to one embodiment of the present invention is attached to the top of a gatepost. [Figure 3] FIG. 3 is an exploded perspective view showing the structure of a sudden descent stopping device 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 for an electric shutter gate according to one embodiment of the present invention. [Figure 5] FIG. 5 is an exploded perspective view showing the structure of a ratchet rotation group of a sudden descent stopping device 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 in the brake of the sudden descent stopping device 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 sudden descent stopping device for an electric shutter / gate according to one embodiment of the present invention has lost 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 in a state where the shutter of the sudden descent stopping device for the electric shutter gate according to one embodiment of the present invention has lost control. [Figure 10] FIG. 10 is a perspective view showing a state in which an electric shutter / gate sudden descent stopping device 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 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 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 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 has not lost 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 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 accompanying drawings and symbols disclosed.

[0016] Please refer to Figures 1 and 2. As shown in Figures 1 and 2, a sudden descent stopping device for an electric shutter / gate according to one embodiment of the present invention includes a pair of shutter / gates 11 of an electric gate 10 that are raised and lowered by an electric motor 12 along guide rails 130 (see Figure 7) of a pair of gate posts 13. At least one sudden descent stopping device 20 is provided above the pair of gate posts 13. As shown in Figures 2 and 3, each sudden descent stopping device 20 has at least one brake 30 and a traction shaft 22 attached to the upper end of the guide rails 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 movement 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 positioned 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 and through the first rotating disk 41, to which the traction shaft 22 is attached. 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 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 44 is pivotally mounted on the first rotating disk 41 through the pivot hole 431. The ratchet portion 432 has a square notch 434 on the side opposite the pivot hole 431 of the balance weight body 430, forming an engagement end surface 435. The limiting portion 433 has an elastic member 436 that acts on the support seat 42 and normally limits the ratchet portion 432 and the engagement end surface 435 from exceeding the periphery of the first rotating disk 41 .

[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 ratchet hole 50 so as to surround the periphery of the first rotary disk 41. In the radial direction of the hole wall of the ratchet hole 51, 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 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 is slowly raised or lowered (opened or closed) 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 dive 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 remains within the range of 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 disk 41 and coming into contact with or colliding with the ratchet teeth 53 of the ratchet seat 50, and allowing the set of shutter gates 11 to open or close normally without interference from 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 Figure 1) raises or lowers the shutter gate 11 along the guide rail 130 of the gatepost 13, the kinetic energy of the free fall of the 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, 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 surface 435 of the ratchet portion 432 of the ratchet member 43 swings, engaging the periphery of the first rotating disk 41 with the stopper surface 54 of one of the ratchet teeth 53 of the ratchet seat 50, preventing rotation, and the pair of shutter gates 11 (see FIG. 7) that are rapidly descending immediately stops their rapid descent because the associated traction shaft 22 does not rotate. Therefore, the overall structural design effectively prevents the pair of shutter gates 11 from accidentally descending when opening or closing them, as shown in FIG. 7.

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

[0022] In the above-described 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. Each pair of pawl accommodating spaces 421 has 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 45 located near the ratchet portion 432. One end of each shaft 45 is inserted into a pair of oval holes 410 in 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 a synchronous interlocking member 47. A bearing hole 470 is formed in the center of the synchronous interlocking member 47, and a bearing 471 that freely rotates on the traction shaft 22 is attached thereto. See FIG. 9. 9, when the ratchet portion 432 of one of the pair of ratchet members 43 swings around the periphery of the first turntable 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 swings around the periphery of the first turntable 41, so that the ratchet portions 432 of the pair of ratchet members 43 swing in sync above the pair of pawl accommodating spaces 421. As shown in FIGS. 4 to 6, a second turntable 41A is provided on a different surface of the support seat 42 from the first turntable 41. The second turntable 41A has the same structure and shape as the first turntable 41, and has a pair of oblong holes 410 to which a pair of ratchet members 43 are pivotally attached and through which shaft rods 45 are 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 the center of the other synchronous interlocking member 47 is formed with a bearing hole 470 to mount a bearing 471 that rotates freely on the traction shaft 22. Pivot shafts 48 are provided at both ends of the pair of two synchronous interlocking members 47 to interlock with each other. Pivot shafts 44 are pivotally attached to both the first turntable 41 and the second turntable 41A on the pivot holes 431 of the pair of ratchet members 43, allowing the ratchet members 43 to swing and provide 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, thereby swinging them in sync and improving stability.

[0023] 1 to 3, the above-described embodiment may alternatively be modified so that the electric motor 12 of the electric gate 10 winds up a set of shutter gates 11, each of which has slats connected in series, around a door winding shaft 14, and raises and lowers the set along guide rails 130 (see FIG. 4) of a pair of gateposts 13. The fixed seat 21 of the sudden drop stop device 20 may be formed as part of the door winding shaft 14 by attaching the brake 30 to a frame-shaped base on the side panel 150 of the case 15 and fixing the traction shaft 22 to the door winding shaft 14. As shown in FIGS. 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, when the door winding shaft 14 goes out of control while winding up the set of shutter gates 11, the brake 30 responds to the abnormally high rotation speed of the door winding shaft 14 and quickly activates the braking mechanism to stop the rotation of the traction shaft 22, thereby preventing the set of shutter gates 11 from suddenly dropping.

[0024] In the above-described embodiment, as shown in FIGS. 10 to 13, a set of shutter gates 11A of an electric gate 10A may be pivotally mounted 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 mounted. 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 rollers 112 provided on both sides of the lower door piece 111, causing it to rise and fall along guide rails 130A on a pair of gateposts 13A. The fixed base 21A of each sudden descent stopping device 20A (two sudden descent stopping devices 20A are preferably evenly spaced above the gateposts 13A) has a brake 30 and a traction shaft 22A attached to a hanging base on the upper door beam 17 at the top end of the pair of gateposts 13A. The traction shaft 22A is mounted on 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. The pulling end of the string 61 is connected to the lower door piece 111. 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 limited by a limiting member 81 provided on the cover 80, and the inner end is connected to the traction shaft 22A. As shown in Figures 14 and 16, under normal conditions, when the lower door piece 111 of one shutter gate set 11A is lowered (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 is raised, the coil spring 70 releases its 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 shutter gate set 11A is open or when the lower door piece 111 is being raised or lowered or closed (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 rotating 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 swinging. That is, the string body 61 restrains the downward movement of the lower door piece 111, and prevents the set of shutter gates 11A from suddenly falling.11 to 13, a winder 60 is fixed to one end of the traction shaft 22A. Brakes 30 fixed to 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 balanced manner between the two brakes 30. Coil springs 70 and limiting covers 80 are provided on both ends of the traction shafts 22A on both sides of the winder 60, respectively, and fixed onto ratchet seats 50 (because both ends of the traction shaft 22A have the same structure, only the components at 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 improve the ability of the winder 60 to wind up the string 61.

[0025] Although the preferred embodiments of the present invention have been disclosed above so that those skilled in the art can understand, they are not intended to limit the present invention in any way. Various changes and modifications can be made within the scope of the present invention. Therefore, the scope of the 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 member 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 member 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 Edition 110 Upper door piece 111 Lower door piece 112 Laura 130 guide rail 130A Guide Rail 150 Side plate 180 Rope shaft 181 pull cord 410 Oblong hole 420 Pivot shaft hole 421 Claw Storage Space 422 Insertion hole 430 Balance weight body 431 Pivot hole 432 Ratchet part 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 for an electric shutter gate, including a pair of shutter gates that are raised and lowered by an electric motor along guide rails on a pair of gate posts, At least one sudden descent stop device is provided above the pair of gateposts, Each sudden drop stop device has 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 rotating group and a ratchet seat, the ratchet rotating group is located on a support seat provided on the surface end of the first rotating disk, the support seat having a pivot hole formed through the first rotating disk at the center and for attaching the traction shaft, and at least one pawl accommodating space formed between the support seat and the first rotating disk, a ratchet member provided on each of the pawl accommodating spaces, the balance weight body of each ratchet member having a pivot hole formed on one end and a ratchet section formed on the other end, a limiting section provided on one side of the body section of the balance weight body, the pivot shaft being pivotally attached to the first rotating disk through the pivot hole, the ratchet section having a square notch on the opposite side of the pivot hole of the balance weight body to form an engaging end surface, the limiting section having an elastic member acting on the support seat and limiting the ratchet section and the engaging end surface from going beyond the periphery of the first rotating disk 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 it to surround the periphery of the first rotating disk, and in the radial direction of the hole wall of the ratchet hole, a plurality of arc-shaped notches that accommodate the balance weight body of the ratchet member are arranged in an annular shape 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 corresponding to the limiting portion of the ratchet member, the limiting portion has a screw hole into which a screw is screwed, 2. The sudden descent stopping 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; A pair of the pawl accommodating spaces includes 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 a shaft near the ratchet portion, one end of each of the shafts 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 to attach 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, and has a pair of oblong holes to which a pair of the ratchet members are pivotally attached and through which the shaft rods are 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, the center of the other synchronous interlocking member is formed with the bearing hole to attach 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 sudden descent stopping device for an electric shutter gate described in any one of claims 1 to 4, characterized in that the electric motor of the electric gate winds up a set of shutter gates, each of which has slats connected in series, using a door winding shaft to raise and lower the set along the guide rails of the pair of gateposts, and the fixed seat of the sudden descent stopping device attaches the brake to a frame-shaped base on the side panel of the case, and fixes the traction shaft to the door winding shaft to form 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 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 the rollers provided on both sides of the lower door pieces, causing them to rise and fall along the guide rails of the pair of gateposts. 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 gateposts, and the traction shaft is assembled onto the pivot shaft hole of the ratchet rotating group of the brake, with a winder fixed at one end and a coil spring at the other end, a string wound around the winder, and the pulling end of the string is connected to the lower door piece. A sudden descent stopping device for an electric shutter / gate as described in any one of claims 1 to 4, characterized in that the coil spring is covered by a cover that is connected 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 winder is fixed to one end of the traction shaft, 7. The sudden descent stopping device 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, respectively.

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

Images