A movable material storage frame with controllable runway discharging

Abstract

The application discloses a movable material storage frame with controllable discharging of a runway, which comprises a runway groove, a swing lever chain, a material supporting door and a triangular material storage frame, etc. The device disclosed by the application can improve the cooperation ability of the straightening machine, product quality and energy saving effect.

Description

Technical Field

[0001] This invention relates to a material storage frame device, mainly used on construction sites and by steel bar processors, for processing and bending various wire steel bars with diameters of φ6-φ12 mm into hooks. Background Technology

[0002] Currently, there are generally three types of center rod hook slot devices used in the straightening and cutting integrated machines with hooks produced by domestic manufacturers.

[0003] The first type is a grooved hook slot used on large straightening and bending integrated machines. This hook slot structure has a circular concave clasp shape at the front end of the outer circle of the main bending hook rotating shaft. A concave groove 20 mm wide and 25 mm deep is cut in the middle of a 60 mm diameter, 60 mm high circular piece of material on the front outer circle of the shaft. This concave groove is integrated with the main bending hook rotating shaft, forming a main bending hook slot shaft. The hook slot shaft is installed in the bearing sleeve in the middle of the inclined plate of the bending machine's working surface. The inner end of the hook slot shaft engages with the reduction gear in the gearbox. The tail end of the shaft-mounted gear is installed on a concave rolling device, controlling the sliding engagement of a cam, which works in conjunction with the concave wheel installed on the main bending hook slot to control the movement of the hook slot shaft.

[0004] The second type is basically the same as the first type of hook spindle gear rotation motion control concave-convex pulley structure, except that there are some changes in the hook groove part in front of the shaft. The original groove is replaced with a circular central rod, and the outer circle is replaced with an iron sleeve. Next to the central rod shaft, a 16 mm thick elliptical iron plate is welded at a 90-degree angle to the central rod. The hook iron sleeve is installed on the iron plate. The distance between the outer circle edge of the iron sleeve and the outer circle edge of the central rod is about 22 mm. The protrusion length of the central rod is about 30 mm, and the thickness of the outer circle hook iron sleeve is about 30 mm, forming a hook groove that is 22 mm wide and 30 mm deep. When bending the rebar, the front traction wheel of the straightening machine rolls the multiple rollers. When the straightened rebar is fed 5 cm from the discharge port, the front feeding traction wheel must stop feeding for about 2 seconds to allow the central shaft slot to extend from the bushing and engage the 5 cm head of the rebar into the hook slot. Simultaneously, under mechanical rotation control, the hook spindle rotates 90 or 135 degrees clockwise. Under the action of the reverse force at the discharge port, the rebar in the slot is bent into a hook. After the hook is formed, the concave wheel installed under the working spindle of the hook slot, driven by the gear return and reverse rotation, automatically retracts the hook spindle into the bushing and returns it to its original position. At the same time, the straightening machine restarts the traction wheel to feed the rebar into the track groove to a length of 1 cm. When the length is 0.05 meters, the measuring wheel transmits the length signal to the electrical control box, which stops the feeding of the front traction wheel of the straightening machine. At the same time, the main shaft of the center hook groove extends out again from the bushing in the middle of the working iron plate. Meanwhile, the cutter in front of the discharge port cuts the steel bar. After the steel bar is cut, the center hook groove rotates 135 degrees counterclockwise, bending the steel bar into a 135-degree angle. At the same time, the center hook groove shaft, driven by the return reversing concave wheel, re-enters the bushing and returns to its original position. For both types of hook groove shafts mentioned above, each time a hook is bent, the groove shaft must extend from the bushing and rotate 90 or 135 degrees to complete the hook formation of the rebar. After the rebar hook is formed, the hook main shaft needs to quickly reverse and retract into the bushing to return to its original position before the front and rear traction wheels can resume traction feeding. Because the straightening, traction feeding, cutting, and hooking of the rebar are all designed on the same center line, when the rebar is hooked, the straightening system and traction feeding system on the same central working line must stop working for 2 seconds to wait for the moving cutter to cut the rebar from top to bottom. At the same time, the cutter occupies the position of the center line of the traction feeding rebar. If the feeding is not stopped, the rebar fed by the traction wheel will block the cutter, preventing the cutter from returning to its position. If the feeding is not stopped when the rebar is hooked, the center hook groove will extend out and bend while also occupying the center line of the traction wheel feeding the rebar. Similarly, under the traction thrust of the traction wheel, the rebar fed by the hook groove shaft and the cutter will be severely bent and deformed, causing the machine to malfunction.

[0005] The third type: used on the improved 4-12 type straightening and cutting integrated machine with hooks. The installation working principle of the central hook groove shaft of this hook bending machine is as follows: In the middle of the iron plate of the working inclined surface of the hook bending machine, a bearing iron sleeve for installing the hook main shaft is welded. The hook main shaft and the bearing are installed in the bearing iron sleeve. The hook main shaft has a central through hole with a diameter of 20 mm. A central rod with a diameter of 20 mm is installed in the hole. The lower part of the central hollow shaft gear is connected and matched with the hook central rod. A device for controlling the entry and exit of the hook central rod in the concave groove is installed. The connecting piece for controlling the sliding of the cam is engaged. When the concave wheel on the central shaft is connected to the central hollow shaft hook and rotates, the convex pulley is controlled to extend and retract the central rod into the central hole of the main shaft. Inside the central shaft sleeve on the 30-degree inclined plane frame, a circular iron turntable is installed at the front end of the central shaft. A thickened iron sleeve for bending hooks is installed on the edge of the turntable, forming a hook slot with the central rod that moves in and out of the hollow shaft's central hole. A baffle device is installed on the iron plate of the inclined plane moving frame next to the turntable, acting as a baffle to prevent the rebar from bending in the opposite direction. A circular slot is cut around the central shaft on the iron plate of the inclined plane mounting center shaft turntable, used to install the power switch for controlling the 90-degree or 135-degree travel of the hook positioning. A stop limit switch is installed at the top dead center of the central slot disc. This stop switch cuts off the motor's reverse power supply when the hook spindle reverses back to its original position, controlling the hook's reverse return to stop the machine. This 4-12 type straightening, cutting, and hook-bending integrated machine consists of two machines, front and rear, working simultaneously, but can only bend one rebar at a time. The 4-12 type straightening, cutting, and bending integrated machine, when bending is required, first guides the straightened rebar into the track groove in front of the straightening machine. Once the rebar reaches the set length, the control limit switch installed on the track inputs power to the control cutting system, cutting the rebar in the track groove. Simultaneously, the material gate below the track opens, and the straightened and cut rebar falls into the bending hook slot on the center rod of the front and rear bending machines. As the straightening machine's rebar cutting blade returns to its original position, a pulley mounted on the blade activates the bending hook limit switch power supply in the electrical box. The power supply to the flow meter controls the operation of the front and rear hook bending machines. The front hook bending machine rotates clockwise, while the rear hook bending machine rotates counterclockwise. Simultaneously, the steel bars in the hook slots of the center rods of both machines are forcibly pulled taut. Rotating 135 degrees in both directions, the steel bars on the center rods of both machines are bent into hooks. After the hooks are formed, the limit switch mounted on the inclined iron plate controls the front and rear hook main shafts to reverse and return to their original positions. At the same time, the concave roller mounted below the hook main gear shaft slides into the center hole of the hook main shaft through a connecting piece with the control cam. The steel bars on the center rod then automatically slide down into the material support hook below under the force of gravity.

[0006] The following shortcomings were found during the use of the bending machine: Shortcoming 1: When bending the steel bars, the steel bars in the front and rear bending hook grooves rotate along the central rod of the main shaft in opposite directions. While forcibly tightening the steel bars, all the iron oxide dust that falls off the surface of the steel bars falls onto the central rod. Each time a hook is bent, the central rod needs to move in and out of the central shaft hole once. The frequent in-and-out movement often blocks the central hole on the central shaft, causing the central rod to be unable to move in and out normally. As a result, the bent material hooks on the central rod cannot fall into the material hooks below normally.

[0007] Deficiency 2: The bearing sleeve of the main shaft of the center hook is welded to the middle hole of the iron plate on the working slope of the hook moving frame. The bearing sleeve is welded perpendicular to the iron plate plane at 90 degrees on each side. This method does not leave enough inclined space for actual material discharge. As a result, when the rebar hook is bent, the front and rear hook machines rotate clockwise and counterclockwise, forcibly pulling the rebar on the center rod to rotate and bend the hook by 135 degrees. At the same time, the rebar generates a reverse pulling force, which clamps the front and rear center rods and causes them to bend and deform. This prevents the center rod from entering the center hole of the main shaft normally, and the bent hook cannot fall into the material support frame below. It must be removed manually. Summary of the Invention

[0008] The purpose of this invention is to provide a controllable material discharge movable storage frame for a runway, including a triangular storage frame (8), wherein: the triangular storage frame (8) is composed of a material support rod and a movable outer frame (18), the material support rod of the triangular storage frame (8) is respectively installed on both sides of the material discharge of the material support gate (7), and the material support gate (7) is set below the runway groove (1) by connecting hinges.

[0009] Further: A support channel steel is installed under the runway square tube main beam (A6), and a connecting hinge is installed on the support channel steel. A steel hole is provided on the support channel steel. The runway main beam (A7) is installed in the steel hole of the support channel steel extending under the runway square tube main beam (A6) through an angle iron. A fixed length limit switch (2) is installed in the hole of the support channel steel extending under the runway square tube main beam (A6) through an angle iron. The runway main beam (A7) is provided with a runway size plate angle iron (A8). The runway size plate angle iron (A8) is fitted with a small iron sleeve on an angle iron on the runway main beam (A7). The small iron sleeve is sandwiched between the runway size plate angle iron (A8) and the angle iron on the aforementioned main beam (A7). The runway groove (1) is formed between the runway size plate angle iron (A8) and the angle iron on the runway main beam (A7).

[0010] Furthermore: the rearmost end of the runway square tube main beam (A6) is installed on the support of the track connecting fixing foot. The front and rear tracks of the mobile machine are installed on the track connecting fixing foot. The front main hook machine is set at the front end of the mobile machine track, and the rear mobile hook machine is set at the rear end of the mobile machine track. The frame of the front main hook machine is the front control frame (A3). The front end of the runway square tube main beam (A6) is fixed to the side of the front control frame (A3) of the front main hook machine with screws.

[0011] Furthermore: A swing arm chain (6) is welded between the channel steel under the main beam of the runway square tube (A6) and the inner side of the front end of the angle iron of the material gate (7). The swing arm chain (6) is connected to the front swing arm (5) on the No. 1 eccentric wheel (4) in the front control frame (A3) of the front main bending machine (A2). The No. 1 eccentric wheel (4) is installed on the reduction output shaft of the starting reduction motor (3) in the front control frame (A3). The material support rods of the triangular storage frame (8) are respectively installed on both sides of the material outlet of the material gate (7). Each inner rod is installed at a 45-degree angle and at a distance of 80 cm in the screw hole of the main beam of the runway square tube (A6). Each outer rod is installed at a 30-degree angle and at a distance of 80 cm on the movable long hollow tube on the edge of the angle iron (A8) of the runway size plate of the main beam of the runway (A7).

[0012] Further: The movable long hollow tube and the tube sleeve are installed and connected to the edge of the runway size plate angle iron (A8). The front end of the movable long hollow tube is welded with a drive handle sleeve. The drive handle sleeve is movably connected to the drive iron sleeve of the pull rod (17) on the front control frame (A3). The other end of the pull rod (17) is connected to the rotating swing arm (15) driven by the No. 2 eccentric wheel (14) in the front control frame (A3) through the pull rod chain (16). The No. 2 eccentric wheel (14) is installed on the reduction output shaft of the reduction motor power supply (13). An 18-tooth gear (9) is installed on the outer side of the No. 1 eccentric wheel (4). The 18-tooth gear (9) has 18 teeth. The 18-tooth gear (9) rotates 360 degrees together with the No. 1 eccentric wheel (4). The swing arm chain (6) moves the material gate (7) under the runway trough (1) The 18 gear (9) is pulled open. A rolling bearing is installed on the side of the 18 gear (9). A single-stroke limit switch (11) is installed on the rolling bearing. The single-stroke limit switch (11) is equipped with a limit switch power supply (12). On the output shaft of the starting gear reducer power supply (13) inside the front control frame (A3), a 36 gear (10) is installed on the outer side of the 2nd eccentric wheel (14). The 36 gear (10) has 36 teeth. The 36 gear (10) rotates 360 degrees together with the 2nd eccentric wheel (14). The pull rod chain (16) pulls open the movable outer frame (18). A rolling bearing is installed on the side of the 36 gear (10). A limit switch (22) is installed on the rolling bearing. A return spring (21) is installed between the pull rod (17) and the movable outer frame (18).

[0013] The beneficial effects of this invention are: Advantage 1: High speed and high output.

[0014] When bending the rebar, the front traction feeding wheel of the straightening machine does not need to stop and wait for the bending machine. The bending process takes up 2.5 seconds of the straightening machine's discharge time difference. The front traction wheel of the straightening machine can continuously pull the straightened rebar in the straightening cylinder at a discharge length of 45 meters per minute and continuously feed the straightened rebar in the straightening cylinder into the raceway trough, ensuring the completion of the daily processing output.

[0015] Advantage 2: Stable mechanical rotation performance and extremely energy-efficient.

[0016] When bending steel bars: The front traction wheel of the straightening machine can rotate continuously to pull the straightened steel bars out of the straightening cylinder. This reduces the need to control the rotation of the clutch gear installed on the drive shaft of the traction wheel, reduces the manufacturing cost, and also improves the stability of the feeding of the straightening machine's traction wheel.

[0017] Advantage 3: Ensures the stability of the hook.

[0018] The steel bars cut within the runway trough are dropped into the core slots of the bending machine's hooks in two stages. When the material support gate opens, the steel bars first fall into the movable outer frame below the support gate, reducing the impact and bouncing caused by the direct drop. This also solves the problem of inconsistent heights and asynchronous discharge caused by the steel bars falling directly from the runway trough into the core hook slots of the bending machine. Within the triangular storage frame, the steel bars automatically form a vertical angle. When the movable outer frame opens for discharge, the steel bars slide vertically and smoothly into the core hook slots of the front and rear bending machines, ensuring the stability of the steel bars as they slide into the hook slots.

[0019] Advantage 4: When the straightening hook is used with a wire drawing and extension machine or a rebar bending hook, the front traction feeding wheel of the straightening machine can rotate and feed continuously. The wire rebar behind the straightening machine is wrapped around the large steel wheel of the wire drawing machine. The speed of the straightening machine and the speed and output length of the wire drawing machine can be consistent and synchronized, and the wire rebar will not slip on the large steel wheel.

[0020] Advantage 5: Stability when used with compatible components

[0021] The material support gate below the straightener's discharge track trough and the movable outer frame of the storage box below it are controlled by eccentric wheel devices mounted on the output shafts of two small motors with reduction gears, installed inside the control frame at the front of the track. The opening of the material support gate can be controlled independently, and the opening of the movable outer frame can be controlled continuously. When the material support gate opens, the first rebar falling from the track trough is first stored in the material support box. While waiting for the second rebar to fall from the track trough and enter the storage box, the movable outer frame below the material support gate opens, allowing the bending machine to bend two rebars simultaneously. This solves the major problem of the straightener's front traction wheel having a discharge length of 45 meters per minute and the 2.5-second time difference required for the bending machine to bend, enabling simultaneous and synchronized operation. It also ensures the stability of the straightener and bending machine when used together. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the storage frame structure of the present invention;

[0023] Figure 2 This is a top view schematic diagram of the storage frame structure of the present invention;

[0024] Figure 3 This is a structural diagram of the raceway with a storage frame according to the present invention;

[0025] In the diagram: 1. Track trough; 2. Fixed-length limit switch; 3. Starting geared motor; 4. Eccentric wheel No. 1; 5. Front swing arm; 6. Swing arm chain; 7. Material support gate; 8. Triangular storage box; 9. Gear No. 18; 10. Gear No. 36; 11. Single-stroke limit switch; 12. Limit switch power supply; 13. Geared motor power supply; 14. Eccentric wheel No. 2; 15. Rotating swing arm; 16. Pull rod chain; 17. Pull rod; 18. Movable outer frame; 21. Return spring; 22. Limit switch; A1. Straightening and cutting machine—8 for pulling out rebar; A2. Front main bending machine; A3. Front control frame; A5. Rear moving machine push handle; A6. Track square tube main beam; A7. Track main beam; A8. Track dimension plate angle iron; A10. Material fork drive tube; A14. Moving cable; A15. Electrical control box; Specific implementation methods

[0026] When the front traction wheel of the straightening and cutting machine is used with it, it pulls the straightened steel bar in the straightening cylinder into the track groove. When the set length is reached, the control power supply of the fixed length limit switch installed on the track turns on the electromagnet of the shearing control clutch on the straightening machine. The rotating shearing device of the straightening machine cuts the steel bar in the track groove. At the same time, the same control power supply from the single-stroke limit switch 11 on the track, namely the limit switch power supply 12, starts the control frame. The No. 1 eccentric wheel 4 on the output shaft of the starting reduction motor 3 installed at the front rotates 360 degrees, driving the front swing arm 5 close to the No. 1 eccentric wheel 4. The swing arm chain 6 installed on the front swing arm 5 pulls open the material support gate 7 under the track groove 1. The first steel bar cut in the track groove 1 will automatically slide into the movable outer frame 18 under the material support gate 7. At the same time, the material support gate 7 will automatically close and return to its original position under the action of the return spring. While the straightening machine is cutting the steel bars, the front traction feeding wheel continuously pulls the steel bars from the straightening cylinder into the track trough 1 at a discharge length of 75 cm per second. When the steel bars in the track trough 1 reach the set length again, the fixed length travel switch 2 installed on the track will control the shearing rotation device again to cut the second steel bar in the track trough 1. At the same time, the same power source from the fixed length travel switch 2 on the track will start the starting reduction motor 3 installed in the frame again. The No. 1 eccentric wheel 4 installed on the output shaft of the starting reduction motor 3 will rotate 360 ​​degrees, driving the front swing rod 5 close to the No. 1 eccentric wheel 4. The swing rod chain 6 installed on the front swing rod 5 will open the material support gate 7 under the track trough 1 for the second time. The second steel bar cut in the track trough 1 will fall into the movable outer frame 18 under the material support gate 7 again. The material support gate 7 will automatically close under the action of the return spring and return to its original position. The front traction wheel of the straightening machine can continuously feed the steel bars into the runway trough 1 while the steel bars are being cut.

[0027] When the material gate 7 under the runway trough 1 opens for the second time to discharge material, the second steel bar cut inside the runway trough 1 slides into the movable outer frame 18 under the material gate 7. At the same time, the 18-tooth gear installed on the side of the No. 1 eccentric wheel 4 on the output shaft of the starter reduction motor 3 installed in the frame rotates for the second 360 degrees, which drives the 36-tooth large gear installed on the frame to rotate 360 ​​degrees. The rolling bearing installed on the side of the 36-tooth large gear opens the limit switch 22 installed on the frame while the gear is rotating. The No. 2 eccentric wheel 14 installed in the starter frame rotates 360 degrees, which drives the rotating swing arm 15 close to the No. 2 eccentric wheel 14. The pull rod chain 16 installed on the rotating swing arm 15 opens the movable outer frame 18 under the material gate 7 through the pull rod chain 16, and the two steel bars stored in the frame slide down synchronously and smoothly into the hook slot of the center rod of the front and rear bending machine. The movable outer frame 18 automatically closes and returns to its original position under the action of the return spring. The main purpose of this invention is to solve the problem that when the straightening machine and the bending machine are used together, the bending machine occupies a 2.5-second time difference in the straightening machine's output length. To ensure that the output speed of the straightening machine is synchronized with that of the bending machine, it is necessary to add a material storage frame device under the material support gate.

[0028] The triangular storage frame 8 below the material gate 7 of the runway trough 1 is mainly used to solve the problem of the straightening machine outputting material at a speed of 45 meters per minute and 75 centimeters per second, and can be used in conjunction with the hook bending machine for material storage. Each hook bending machine takes 2.5 seconds to complete a bend. The hook's return and discharge time also consumes 2.5 seconds of the straightening machine's discharge time. Therefore, the discharge length of the hook bending machine and the straightening machine must be synchronized with the time taken for bending to meet the requirement of 45 meters of material per minute for straightening, cutting, bending, return, and discharge. To solve this problem, 1-meter reinforcing bars for the hooks are stacked simultaneously, with two or more bars bent at a time. This ensures the straightening machine's discharge length and speed are synchronized with the hook bending machine. A movable outer frame 18 must be added below the material gate 7 of the track. The first rebar cut in the track groove 1 and exiting the material gate 7 falls into the movable outer frame 18 below the gate. Storing the rebar stores time. Based on the shortest reinforcing bar of 1 meter, the hook's discharge length is calculated as 1 meter. Based on a length of 0.1 meters, and assuming the straightening machine outputs 75 centimeters per second, the straightening and output time for a 1.1-meter-long rebar requires 1.46 seconds. First, the first rebar is stored in the movable outer frame 18 below the material gate 7. Simultaneously, the traction feeding wheel at the front of the straightening machine continuously feeds the second straightened rebar into the raceway trough 1. When the rebar in the raceway trough 1 reaches the set length of 1.1 meters, the cutter on the straightening machine cuts it in the raceway trough 1. At the same time, the material gate 7 reopens, and the cut second rebar in the raceway trough 1 automatically slides down into the movable outer frame 18 below the material gate 7. This process takes 1.46 seconds. Adding the time required to straighten and output both rebars, the straightening machine takes 2.92 seconds to complete the process. Using the method of storing the rebar in the movable outer frame 18 first and bending two rebars simultaneously at a time, each bend takes 2 seconds. The method of straightening two bars in 0.5 seconds and straightening the output length of the straightening machine takes 2.92 seconds, with an extra 0.42 seconds for the stability of each hook output. At the same time, it also achieves the effect of increasing the delay of the movable outer frame 18. This solves the major problem that the front traction wheel of the straightening machine can continuously pull and send the steel bars into the track groove 1 when the steel bar hook is bent.

Claims

1. A movable storage frame with controllable material discharge for a racetrack, comprising a triangular storage frame (8), characterized in that: The triangular storage frame (8) consists of a material support rod and a movable outer frame (18). The material support rods of the triangular storage frame (8) are respectively installed on both sides of the material discharge gate (7). The material discharge gate (7) is set below the runway trough (1) by connecting hinges. A support channel steel is installed under the runway square tube main beam (A6). A connecting hinge is installed on the support channel steel. A steel hole is provided on the support channel steel. The runway main beam (A7) is installed in the steel hole of the support channel steel extending under the runway square tube main beam (A6) by an angle iron. The fixed length limit switch (2) is installed by an angle iron. Inside the support channel steel hole extending from the runway square tube main beam (A6); the runway main beam (A7) is provided with a runway dimension plate angle iron (A8), the runway dimension plate angle iron (A8) is fitted with a small iron sleeve on an angle iron on the runway main beam (A7), the small iron sleeve is clamped between the runway dimension plate angle iron (A8) and the aforementioned angle iron on the runway main beam (A7), the runway groove (1) is formed between the runway dimension plate angle iron (A8) and the angle iron on the runway main beam (A7); the very end of the runway square tube main beam (A6) is installed on the bracket of the track connection fixing foot, the two tracks of the mobile machine are front and rear Installed on the track connecting fixed feet, the front main hook machine is set at the front end of the mobile machine track, and the rear mobile hook machine is set at the rear end of the mobile machine track. The frame of the front main hook machine is the front control frame (A3). The front end of the runway square tube main beam (A6) is fixed to the upper side of the front control frame (A3) of the front main hook machine with screws. A swing rod chain (6) is welded between the channel steel under the runway square tube main beam (A6) and the inner side of the front end of the angle iron of the material gate (7). The swing rod chain (6) is connected to the No. 1 eccentric wheel in the front control frame (A3) of the front main hook machine (A2). 4) The front swing arm (5) is connected, and the No. 1 eccentric wheel (4) is installed on the reduction output shaft of the starting reduction motor (3) in the front control frame (A3). The material support rods of the triangular storage frame (8) are respectively installed on both sides of the material discharge gate (7). Each inner rod is installed at a 45-degree angle and at a distance of 80 cm in the screw hole of the main beam of the track square tube (A6). Each outer rod is installed at a 30-degree angle and at a distance of 80 cm on the movable long hollow tube on the edge of the track dimension plate angle iron (A8) of the main beam of the track (A7).The movable long hollow tube and the tube sleeve are installed and connected to the edge of the runway size plate angle iron (A8). The front end of the movable long hollow tube is welded with a drive handle sleeve. The drive handle sleeve is movably connected to the drive iron sleeve of the pull rod (17) on the front control frame (A3). The other end of the pull rod (17) is connected to the rotating swing rod (15) driven by the No. 2 eccentric wheel (14) in the front control frame (A3) through the pull rod chain (16). The No. 2 eccentric wheel (14) is installed on the power supply of the geared motor (13). On the reduction output shaft of the ), an 18-tooth gear (9) is installed on the outer side of the eccentric wheel (4). The 18-tooth gear (9) has 18 teeth. The 18-tooth gear (9) rotates 360 degrees together with the eccentric wheel (4). The swing arm chain (6) pulls open the material gate (7) under the track trough (1). A rolling bearing is installed on the side of the 18-tooth gear (9). A single-stroke limit switch (11) is installed on the rolling bearing. The single-stroke limit switch (11) is equipped with a limit switch power supply. (12) Inside the front control frame (A3), on the output shaft of the starting geared motor power supply (13), a 36-tooth gear (10) is mounted on the outer side of the eccentric wheel (14) of the No.

2. The 36-tooth gear (10) has 36 teeth. A rolling bearing is mounted on the side of the 36-tooth gear (10), and a limit switch (22) is mounted on the rolling bearing. The 18-tooth gear (9) mounted on the side of the eccentric wheel (4) of the starting geared motor (3) installed in the frame rotates. Simultaneously, the 36 gear (10) mounted on the frame rotates 360 degrees. The rolling bearings mounted on the side of the 36 gear (10) activate the limit switch (22) mounted on the frame as the 36 gear (10) rotates, causing the eccentric wheel (14) mounted inside the frame to rotate 360 ​​degrees. The pull rod chain (16) pulls open the movable outer frame (18). A return spring (21) is installed between the pull rod (17) and the movable outer frame (18).

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