A security gate for a device

Abstract

The application discloses a safety door for equipment, aiming at solving the problems of low sensitivity, slow reaction and complex structure of the safety door in the prior art. The safety door comprises a safety door body, a power device, a transmission mechanism and a self-locking mechanism. The power device is used for providing power for the safety door body. The transmission mechanism is used for transmitting power of the power device to the safety door body. The self-locking mechanism is used for locking the safety door body. When the safety door body encounters an obstacle, the self-locking mechanism locks and stops the movement of the safety door body, and the transmission mechanism cuts off the power transmitted by the power device to the safety door body. When foreign matters are stuck at the lower end of the safety door, the self-locking device self-locks the safety door, so that the safety door cannot continue to move.

Description

Technical Field

[0001] This invention relates to the field of security door technology, and more specifically, to a security door for equipment. Background Technology

[0002] Safety doors are used in various locations to prevent injury to people when the door closes due to mechanical or electrical failures. Examples include factory warehouse doors and safety doors for machinery. Especially in the field of machinery safety doors, to ensure the safety of machining, machining equipment is placed in a certain enclosed space, and a safety door is installed in the enclosed space to allow operation of the machining equipment. Operation of the machining equipment is only permitted when the safety door is open. Since the machining equipment needs to be operated continuously, the opening and closing of the safety door is also a long-term, uninterrupted process, which poses a significant challenge to the performance of the safety door.

[0003] Safety doors in the present technology are usually operated and controlled by photoelectric control in order to prevent injury to operators; however, the system may malfunction under long-term use, and once a malfunction occurs and an injury is caused to the operator, it will be irreversible. There are also mechanical safety doors in the present technology. These safety doors are not very sensitive, do not react in time, and have a complex structure, resulting in poor protection. Summary of the Invention

[0004] This invention overcomes the defects in the above-mentioned technology and provides a safety protection door for equipment. It can automatically lock itself in time when danger occurs, has high sensitivity, fast response speed, and simple structure.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a safety protection door for equipment, comprising a safety protection door body, including:

[0006] A power unit is used to provide power to the safety door body;

[0007] A transmission mechanism is used to transmit the power of the power unit to the safety door body;

[0008] A self-locking mechanism is used to lock the security door body;

[0009] When the safety door body encounters an obstacle, the self-locking mechanism locks the safety door body and stops its movement, and the transmission mechanism cuts off the power transmitted from the power device to the safety door body.

[0010] This invention connects a power unit to the safety door, enabling automatic opening and closing. A transmission mechanism transmits power from the power unit to the safety door and controls the power transmission. When a foreign object becomes lodged at the bottom of the safety door, a self-locking device locks it, preventing further movement. This prevents secondary damage to the object and damage to the door. Simultaneously, when the door is locked, the transmission mechanism cuts off power, further enhancing its safety performance.

[0011] As a preferred option, the self-locking mechanism includes a clamping mechanism and an anti-pinch mechanism.

[0012] The anti-pinch mechanism acts as the trigger mechanism. When the anti-pinch mechanism is activated, the clamping mechanism is activated, causing the safety door to stop moving.

[0013] Preferably, a guide post is provided on the safety door body, and the clamping mechanism includes:

[0014] A sliding block is fixedly connected to the safety door body and can slide along the guide post. The sliding block is provided with a groove, and the side wall of the groove has an inclined surface in the vertical direction. The sliding block is provided with a rotating hole on one side of the groove.

[0015] A clamping block is disposed in the groove, and a mounting groove is provided at the bottom end of the groove. A clamping spring is disposed in the mounting groove, and the upper and lower ends of the clamping spring abut against the clamping block and the bottom of the mounting groove, respectively.

[0016] A rotating block is provided with a rotating shaft and a limiting shaft; the rotating shaft is disposed in the rotating hole, and the limiting shaft is disposed in the slot to restrict the movement of the clamping block.

[0017] When the anti-pinch mechanism is activated, it will drive the rotating block to move, so that the rotating block can rotate around the rotating shaft. The rotation of the rotating shaft can cause the limit shaft to move, so that the clamping block is ejected by the clamping spring. The clamping block ejected by the clamping spring moves along the inclined surface, so that the clamping block is locked between the guide post and the sliding block, thereby stopping the sliding block from moving.

[0018] Preferably, the anti-pinch mechanism is disposed on the safety door body, and the anti-pinch mechanism includes an anti-pinch plate, which is connected to the safety door body through a floating mechanism.

[0019] When a hand or other clothing exerts force on the anti-pinch plate, the floating mechanism causes the anti-pinch plate to move to a certain extent, which in turn drives the clamping mechanism to move and lock the safety door in place.

[0020] Preferably, the floating mechanism includes a floating link, with a first fixed block and a second fixed block rotatably connected to both ends of the floating link. The first fixed block is connected to the anti-pinch plate, and the second fixed block is connected to the safety door body. When the bottom end of the anti-pinch plate is subjected to an upward force, the anti-pinch plate moves upward relative to the safety door body.

[0021] Preferably, the power unit includes a lifting cylinder, which is connected to a cylinder rod, and the cylinder rod is connected to the safety door body through a transmission mechanism.

[0022] Preferably, the transmission mechanism includes a transmission slider, one side of which is connected to the safety door body, and the other side of which is connected to the power device.

[0023] Preferably, the power unit includes a cylinder rod, which is connected to the transmission slider via a disengagement mechanism. The transmission slider has a disengagement hole, and a pin hole is provided on the side wall of the disengagement hole. The disengagement mechanism includes:

[0024] A release head is fixedly installed at the end where the cylinder rod is connected to the transmission slider, and the release head is movably installed in the release hole; the release head is provided with an annular groove in the circumferential direction.

[0025] The limiting pin is movably disposed within the pin hole;

[0026] The spring is disengaged, and both ends abut against the bottom of the limiting pin and the pin hole, respectively.

[0027] The limiting pin abuts against the annular groove through the action of the release spring, thereby connecting the transmission slider to the cylinder rod.

[0028] When the safety gate stops moving due to the clamping mechanism, the transmission slider on the safety gate will also stop moving. At this time, the release head will continue to move due to the drive of the cylinder rod, causing the release head to disengage from the release hole on the transmission slider, thereby cutting off the power between the cylinder rod and the transmission slider.

[0029] Preferably, the safety door body is provided with a reset pin.

[0030] The reset pin is designed so that when the cylinder rod drives the safety gate to move again via the transmission slider, the clamping mechanism and the suspension mechanism that were in action last time can be automatically reset.

[0031] Preferably, the safety door body includes a fixed door and a movable door, the transmission mechanism is connected to the movable door, and the self-locking mechanism is fixedly installed on the movable door.

[0032] Compared with the prior art, the beneficial effects of the present invention are: (1) safe and reliable, effectively preventing pinching of hands or other foreign objects; (2) fast reaction speed, able to quickly and timely stop the movement of the safety protection door, and at the same time automatically cut off the power device; (3) able to automatically perform reset operation, with a simple structure. Attached Figure Description

[0033] Figure 1 This is a perspective view of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the self-locking mechanism of the present invention;

[0036] Figure 4 This is an exploded view of the clamping mechanism of the present invention;

[0037] Figure 5 This is a structural diagram of the clamping mechanism of the present invention;

[0038] Figure 6 yes Figure 2 A magnified view of a portion of the image;

[0039] Figure 7 This is a cross-sectional view of the transmission structure of the present invention;

[0040] Figure 8 This is a cross-sectional view of the transmission structure of the present invention from another perspective;

[0041] Figure 9 This is a side view of the present invention;

[0042] Figure 10 This is a structural diagram of the buffer plate of the present invention;

[0043] In the diagram: 1. Safety door body, 11. Guide post, 12. Reset pin, 13. Fixed door, 14. Movable door, 141. Buffer plate, 15. Buffer roller;

[0044] 21. Lifting cylinder; 22. Cylinder rod;

[0045] 3. Transmission mechanism; 31. Transmission slider; 311. Release hole; 312. Pin hole; 32. Release head; 321. Annular groove; 33. Limit pin; 34. Release spring.

[0046] 4. Clamping mechanism; 41. Sliding block; 411. Groove; 412. Inclined surface; 413. Mounting groove; 414. Clamping spring; 415. Rotary hole; 42. Clamping block; 43. Rotating block; 431. Rotating shaft; 432. Limiting shaft.

[0047] 5. Anti-pinch mechanism, 51. Anti-pinch plate, 511. Transmission block, 512. Slide groove, 52. Floating connecting rod, 521. First fixed block, 522. Second fixed block. Detailed Implementation

[0048] The technical solution of the present invention will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0049] Example 1: Refer to Figures 1 to 9 As shown, a safety door for equipment includes a safety door body 1, comprising:

[0050] Power unit 2 is used to provide power to the safety door body 1;

[0051] The transmission mechanism 3 is used to transmit the power of the power unit 2 to the safety protection door body 1;

[0052] A self-locking mechanism is used to lock the security door body 1;

[0053] When the safety door body 1 encounters an obstacle, the self-locking mechanism locks the safety door body 1 and stops its movement, and the transmission mechanism 3 cuts off the power transmitted from the power device 2 to the safety door body 1.

[0054] The safety door body includes a door frame and a safety door. The safety door includes a fixed door and a movable door. The fixed door is double-layered and fixedly connected to the door frame. The movable door can slide between the two layers of fixed doors. Guide posts 11 are provided on both sides of the door frame.

[0055] Power devices are installed on both sides of the door frame. The power devices are cylinder driven and include a lifting cylinder 21. The lifting cylinder 21 is connected to a cylinder rod 22. The cylinder rod 22 is connected to the safety door body 1 through a transmission mechanism 3.

[0056] The upper ends of both sides of the movable door are provided with a transmission mechanism 3. The transmission mechanism 3 includes a transmission slider 31. One side of the transmission slider 31 is connected to the safety protection door body 1, and the other side of the transmission slider 31 is connected to the cylinder rod 22 on the power device 2.

[0057] The cylinder rod 22 is connected to the transmission slider 31 via a disengagement mechanism. The transmission slider 31 is provided with a disengagement hole 311, and a pin hole 312 is provided on the side wall of the disengagement hole 311. The disengagement mechanism includes:

[0058] The release head 32 is fixedly installed at the end where the cylinder rod 22 is connected to the transmission slider 31, and the release head 32 is movably installed in the release hole 311; the release head 32 is provided with an annular groove 321 in the circumferential direction.

[0059] The limiting pin 33 is movably set in the pin hole 312;

[0060] The spring 34 is disengaged, and both ends abut against the bottom of the limiting pin 33 and the pin hole 312, respectively. In order to enable the limiting pin 33 to achieve a better limiting effect, the limiting pin 33 is set perpendicular to the disengaged spring 34, so that the limiting pin 33 can achieve a better limiting effect.

[0061] Among them, the limiting pin 33 abuts against the annular groove 321 by disengaging from the action of the spring 34, so that the transmission slider 31 is connected to the cylinder rod 22.

[0062] The self-locking mechanism includes a clamping mechanism 4 and an anti-pinch mechanism 5. The clamping mechanism 4 is located on both sides of the lower end of the side of the movable door 14, and the anti-pinch mechanism 5 is located at the lower end of the movable door 14.

[0063] Clamping mechanism 4 includes:

[0064] The sliding block 41 is fixedly connected to the safety protection door body 1 and can slide along the guide post 11. The sliding block 41 is provided with a groove 411, and the side wall of the groove 411 has an inclined surface 412 in the vertical direction. The sliding block 41 is provided with a rotating hole 415 on one side of the groove 411.

[0065] A clamping block 42 is disposed in a slot 411. A mounting groove 413 is provided at the bottom of the slot 411. A clamping spring 414 is disposed in the mounting groove 413. The upper and lower ends of the clamping spring 414 abut against the clamping block 42 and the bottom of the mounting groove 413, respectively. To improve the clamping ability, the clamping block 42 is provided with an inwardly contracting circumferential surface in the circumferential direction. The circumferential surface can increase the contact area with the guide post 11 and increase the clamping force of the clamping block 42.

[0066] The rotating block 43 is provided with a rotating shaft 431 and a limiting shaft 432. The rotating shaft 431 is located in the rotating hole 415, and the limiting shaft 432 is located in the slot 411 to limit the movement of the clamping block 42.

[0067] An anti-pinch mechanism 5 is installed on the safety door body 1. The anti-pinch mechanism 5 includes an anti-pinch plate 51, which is connected to the safety door body 1 through a floating mechanism. Transmission blocks 511 are provided on both sides of the anti-pinch plate 51, and the transmission blocks 511 abut against the rotating block 43. A reset pin 12 is provided on the door frame, which can abut against the transmission block 511. When the movable door 14 is fully opened, the reset pin 12 abuts against the transmission block 511.

[0068] The floating mechanism includes a floating link 52, with a first fixing block 521 and a second fixing block 522 rotatably connected to both ends of the floating link 52. The first fixing block 521 is slidably connected to the anti-pinch plate 51, and the second fixing block 522 is connected to the safety protection door body 1. Specifically, the upper end face of the anti-pinch plate 51 is provided with a sliding groove 512, the first fixing block 521 is disposed in the sliding groove and can slide along the sliding groove 512, and the second fixing block 522 is fixedly connected to the lower end face of the movable door 14.

[0069] Example 2: Refer to Figure 10 As shown, in order to make the up-and-down movement of the movable door 14 smoother and more stable, buffer plates 141 are fixedly installed on both sides of the movable door 14 along the length of the movable door 14, and buffer rollers 15 are installed on the door frame. The buffer rollers 15 act on the buffer plates 141, so that the movable door 14 can run more smoothly.

[0070] Working principle of the invention:

[0071] 1) During normal operation, the lifting cylinder 21 drives the cylinder rod 22 downwards. The release head 32 at the end of the cylinder rod 22 is positioned within the release hole 311 by the action of the limiting pin 33 and the release spring 34. The movement of the cylinder rod 22 drives the transmission slider 31 to slide along the guide post 11. The movement of the transmission slider 31 drives the movable door 14 to move. At this time, the anti-pinch mechanism 5 continues to move downwards along the movable door 14. The anti-pinch plate 51 restricts the movement of the rotating block 43, and the limiting shaft 432 on the anti-pinch plate 51 restricts the movement of the clamping block 42, so that the clamping block 42 can overcome the action of the clamping spring 414 and is restricted to the bottom of the slot 411. Neither the anti-pinch mechanism 5 nor the clamping mechanism 4 operates, and the movable door 14 is closed. Similarly, the lifting cylinder 21 can drive the cylinder rod 22 to open the movable door 14. Therefore, the lifting cylinder 21 can drive the movable door 14 to open and close.

[0072] 2) In case of danger, for example, when the movable door 14 is closed by the lifting cylinder 21, if a hand or other foreign object is placed at the lower end of the movable door 14, the anti-pinch plate 51 will first come into contact with the hand. This movement, combined with the force of the hand and the action of the floating connecting rod 52, causes the anti-pinch plate 51 to move upwards relative to the movable door. This upward movement of the anti-pinch plate 51 removes its restriction on the rotating block 43, causing the clamping spring 414 to lift the clamping block 42. The clamping block 42 then lifts the limiting shaft 432, causing the rotating block 43 to rotate around the rotating shaft 431. Simultaneously, as the movable door 14 moves downwards, the clamping block 42, lifted by the spring force and the relative movement of the movable door 14, causes the clamping block 42 to quickly move along the groove 411. The inclined surface 412 moves towards the opening of the slot 411. Due to the design of the inclined surface 412, the closer to the opening of the slot 411, the smaller the size of the slot. The clamping block 42 will be locked between the slot 411 and the guide post 11, thus restricting the movement of the sliding block 41. The stopping of the sliding block 41 stops the movement of the movable door 14. At this time, the lifting cylinder 21 continues to drive the cylinder rod 22. Because the movable door 14 is restricted to stop moving by the clamping block 42, the transmission slider 31 stops moving. The release head 32 at the end of the cylinder rod 22 overcomes the force of the limiting pin 33 and the release spring 34 and disengages from the release hole 311, cutting off the power between the lifting cylinder 21 and the movable door 14. When the movable door 14 stops moving, the self-locking mechanism and the power cut-off of the transmission mechanism are simultaneously completed.

[0073] 3) Automatic Reset: After the fault is cleared, the lifting cylinder 21 drives the cylinder rod 22 to move upward, so that the release head 32 overcomes the force of the release spring 34 and the limit pin 33 and resets back into the release hole 311. The cylinder rod 22 drives the transmission slider 31 to move the movable door 14 upward, so that the movable door 14 opens. After the movable door 14 moves upward to a certain distance, the movement of the reset pin 12 and the transmission block 511 restricts the movement of the anti-pinch plate 51, so that the floating mechanism resets. When the movable door 14 is fully open, the action of the reset pin 12 just makes the anti-pinch plate 51 return to the initial position. The transmission block 511 again plays a limiting role on the rotating block 43, so that the limit shaft 432 can overcome the force of the clamping spring 414 and restrict the clamping block 42 to the bottom end of the sliding block 41, realizing the automatic reset of the transmission mechanism, clamping mechanism and floating mechanism.

[0074] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A security door for a device comprising a security door body, characterised in that, include: A power unit is used to provide power to the safety door body; The transmission mechanism is used to transmit the power from the power unit to the safety door body; A self-locking mechanism is used to lock the security door body; When the safety door body encounters an obstacle, the self-locking mechanism locks the safety door body and stops its movement, and the transmission mechanism cuts off the power transmitted from the power unit to the safety door body. The self-locking mechanism includes a clamping mechanism and an anti-pinch mechanism; The clamping mechanism includes: A sliding block is fixedly connected to the safety door body. A groove is provided on the sliding block, and an inclined surface is provided on the side wall of the groove in the vertical direction. A rotating hole is provided on one side of the groove on the sliding block. A clamping block is installed inside a groove, the bottom of which has a mounting slot containing a clamping spring. A rotating block is provided with a rotating shaft and a limiting shaft; the rotating shaft is set in a rotating hole, and the limiting shaft is set in a slot to restrict the movement of the clamping block; The anti-pinch mechanism includes an anti-pinch plate, which is connected to the safety door body through a floating mechanism. The floating mechanism includes a floating connecting rod with a first fixed block and a second fixed block rotatably connected to its two ends respectively. When the bottom end of the anti-pinch plate is subjected to an upward force, the anti-pinch plate moves upward relative to the protective door body; The transmission mechanism includes a transmission slider, one side of which is connected to the safety gate body, and the other side of which is connected to the power unit. The power unit includes a cylinder rod, which is connected to a transmission slider via a disengagement mechanism.

2. A safety door for equipment according to claim 1, characterised in that The safety door is equipped with a guide post. The sliding block can slide along the guide post; The upper and lower ends of the clamping spring abut against the clamping block and the bottom of the mounting groove, respectively.

3. A safety door for equipment according to claim 1 or 2, characterised in that The anti-pinch mechanism is installed on the body of the safety door.

4. A safety door for equipment according to claim 3, characterised in that The first fixing block is connected to the anti-pinch plate, and the second fixing block is connected to the safety protection door body.

5. A safety door for equipment according to claim 1 or 2, characterised in that The power unit includes a lifting cylinder, which is connected to a cylinder rod. The cylinder rod is connected to the safety gate body through a transmission mechanism.

6. A safety door for equipment according to claim 1, characterised in that The transmission slider is provided with a release hole, and a pin hole is provided on the side wall of the release hole; the release mechanism includes: The release head is fixedly installed at the end where the cylinder rod connects to the transmission slider, and the release head is movably installed in the release hole; the release head has an annular groove in the circumferential direction. The limit pin is movably set inside the pin hole; It disengages from the spring, and both ends abut against the bottom of the limiting pin and the pin hole, respectively; The limiting pin engages with the annular groove by disengaging from the spring, thereby connecting the transmission slider with the cylinder rod.

7. A safety door for equipment according to claim 1 or 2, characterised in that The safety door body is equipped with a reset pin.

8. A safety door for equipment according to claim 1 or 2, characterised in that The safety door body includes a fixed door and a movable door, with the transmission mechanism connected to the movable door; the self-locking mechanism is fixedly installed on the movable door.

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