Safety contact plate type anti-pinch detection structure of elevator door

Abstract

According to the safety contact plate type anti-pinch detection structure of the elevator door, safety contact plates used for detecting obstacles in the closing process of the elevator car doors are arranged on the outer side faces of the elevator car doors on the two sides, and the upper ends and the lower ends of the safety contact plates are connected with the elevator car doors through swing rod assemblies correspondingly; the lift car doors are further provided with micro switch assemblies used for detecting that the safety touch plates are blocked by obstacles and move relative to the lift car doors, and the opposite faces of the safety touch plates on the lift car doors on the two sides are provided with staggered structures which are staggered in the direction perpendicular to the lift car doors. The end face of the safety touch plate extends out of the edge of the car door on the side to extend towards the other side and is staggered with the safety touch plate on the other side through the staggered structure. When the car doors are in a closed state, the safety touch plate still protrudes out of the edge of the door and can touch an obstacle clamped between the two car doors, so that the detection effect is always achieved, and the situation of missing detection when the obstacle is thin is avoided.

Description

Technical Field

[0001] The invention relates to elevator safety equipment, in particular to a safety touch-plate anti-pinch detection structure for elevator doors. Background Art

[0002] When the building elevator door is closing, in order to prevent people from being pinched or foreign objects from being mixed in the middle of the elevator door, causing the elevator to malfunction. The existing anti-pinch detection methods include non-contact safety light curtains and contact safety touch panels. Among them, the safety light curtain relies on the projector on one side of the car door to emit modulated infrared light, which is received by the light receiver on the other side, forming a light protection net between the two car doors. According to the changes in the light signal received by the light receiver, it can be determined whether there are obstacles between the car doors, and non-contact rapid detection can be achieved. However, this detection method has a gap between adjacent light paths. For obstacles with smaller vertical dimensions, such as ropes, if they are in this gap, they will be difficult to detect. Moreover, detection failure may occur for transparent objects such as glass.

[0003] The safety touch panel is a contact detection. When the car door is closed, the touch panel protruding from the door edge touches an obstacle, which will cause the touch panel to retract, thereby causing the micro switch on the inside to operate and realize obstacle detection. Since the touch panel is continuous in the height direction of the car door, there is no detection gap, and smaller objects can also be detected. However, the existing safety touch panel also has defects. When the car door is closed, in order to avoid the collision of the touch panels on both sides causing false triggering or damage, a retraction mechanism is usually provided to control the safety touch panel mechanism to retract when the car door is about to close. Therefore, within a very small distance when the car door is about to close, the retracted touch panel will find it difficult to detect obstacles. In particular, for objects with smaller thickness, such as thin ropes, clothes, etc., the safety touch panel mechanism will not be triggered even if they are sandwiched between the two car doors. Due to the existence of this defect, safety accidents often occur. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect that thinner and softer objects are easily missed in detection, and to provide an elevator door safety touch plate type anti-pinch detection structure.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a safety touch plate type anti-pinch detection structure for elevator doors, wherein safety touch plates for detecting obstacles in the process of closing the car doors are provided on the outer side surfaces of the car doors on both sides, and the upper and lower ends of the safety touch plates are respectively connected to the car doors through rocker rod assemblies, and the car doors are also provided with micro switch assemblies for detecting that the safety touch plates are blocked by obstacles and move relative to the car doors. The opposite surfaces of the safety touch plates on the car doors on both sides have a staggered structure that is staggered in a direction perpendicular to the car doors. When the car doors are in a closed state, the end face of the safety touch plate extends out of the edge of the car door on this side to the other side, and is staggered with the safety touch plate on the other side through the staggered structure.

[0006] Furthermore, a protrusion is provided on the end surface of the safety touch plate on one side of the car door, and a depression is provided on the end surface of the safety touch plate on the other side of the car door, and the protrusion and the depression constitute the staggered structure.

[0007] Furthermore, a fixing frame assembly extending up and down along the door edge of the car door is fixedly provided on the outer side of the car door, the left and right sides of the fixing frame assembly are open, the safety touch plate passes through the fixing frame assembly, and can move left and right in the fixing frame assembly; the part of the fixing frame assembly located on both sides of the safety touch plate is fixedly provided with clamping components extending up and down, and when the car door is in a closed state, the clamping components of the fixing frame assemblies on the car doors on both sides cooperate and abut to clamp obstacles between the two car doors.

[0008] The clamping component is made of elastic material, so that the clamping component protruding from the edge of the car door can abut and clamp without affecting the closing of the car door.

[0009] The outer end of the clamping component extends obliquely in a direction away from the safety touch plate, so that the abutting clamping components can move in a direction away from the safety touch plate based on their elastic deformation.

[0010] The clamping component is a rubber strip fixed on the fixing frame assembly.

[0011] The abutting surface of the clamping component is provided with anti-slip grooves.

[0012] The fixing frame assembly comprises supporting strips distributed on both sides of the safety touch plate, a supporting member is arranged between the two supporting strips, and the supporting member is fixed on the car door by bolts.

[0013] The fixing frame assembly leaves a space for the safety touch plate to move on the top of the safety touch plate.

[0014] The safety touch panel is provided with a light curtain assembly for sensing obstacles between the elevator car doors on both sides.

[0015] The beneficial effects of the present invention are as follows: the safety touch panels on the car doors on both sides are staggered by the staggered structure, and when the car doors are closed, the safety touch panels still protrude from the edges of the doors, and can touch the obstruction sandwiched between the two car doors, thereby always playing a detection role, avoiding the situation where missed detection occurs when the obstruction is thin. When the belts, ropes, etc. of passengers are caught, the elevator is prevented from running and causing personal injuries or elevator failure, thereby ensuring the safety of taking the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the elevator door safety touch plate anti-pinch detection structure.

[0017] Figure 2 It is a schematic diagram of the safety touch plate during the closing process of the elevator car door.

[0018] Figure 3 It is a schematic diagram of the safety touch panel when the elevator car door is closed.

[0019] Figure 4 It is a side view of how the fixing frame assembly is set on the car door.

[0020] Figure 5 It is a schematic diagram of the state when the clamping parts on the fixing frame assemblies on both sides are in abutment.

[0021] Figure 6 It is a schematic diagram of the stretching effect of the abutment deformation of the clamping parts on the barrier.

[0022] Figure 7 It is a schematic diagram of the state in which the clamping component clamps an obstacle to assist in the safety touch panel detection.

[0023] Markings in the figure: 1. car door, 2. safety touch plate, 3. raised part, 4. recessed part, 5. swing arm assembly, 6. fixed frame assembly, 7. supporting slats, 8. bolts, 9. clamping parts, 10. obstacle, 11. folding mechanism, 12. car door sill. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. The specific contents listed in the following embodiments are not limited to the technical features necessary for the technical problems to be solved by the technical solutions recorded in the claims. At the same time, the enumerated embodiments are only part of the present invention, not all embodiments.

[0025] Figure 1The figure shows an elevator door with a double-leaf structure, and the direction of the figure is the outer side of the elevator car door. The two elevator car doors 1 are installed in the track of the elevator car door sill 12, and the upper end thereof is connected to the sliding mechanism for controlling the elevator door switch. The safety touch plate 2 is a vertically arranged long strip component, which is arranged on the outer side of the car door 1, that is, between the car door and the floor door. The safety touch plate 2 is connected to the car door 1 through two upper and lower rocker rod assemblies 5. During the closing process of the elevator door, the safety touch plate 2 protrudes from the edge of the elevator door. When it touches an obstacle, the safety touch plate 2 is blocked and retreats to deflect the rocker rod assembly 5. A micro switch assembly is also provided on the car door, which is generally arranged in combination with the rocker rod assembly 5. When the rocker rod assembly 5 deflects and swings, it can touch the micro switch to send a signal to limit the closing of the elevator door.

[0026] The first improvement of the present invention is as follows Figure 2 As shown in FIG. 1 , the opposite surfaces of the safety touch plates 2 on the two sides of the car door 1 have mutually matching concave-convex structures. A convex portion 3 is provided on the end surface of the safety touch plate 2 on one side, and a concave portion 4 is provided on the end surface of the safety touch plate 2 on the other side. The convex portion 3 and the concave portion 4 can be plugged in and matched without interfering with each other. Through this staggered plug-in structure, after the car door is completely closed, as shown in FIG. Figure 3 As shown, the safety touch plate 2 can still stretch out from the edge of the car door on this side and extend to the other side, so that the safety touch plate 2 can touch obstacles such as thin plates sandwiched between the car doors.

[0027] Figure 2 and 3 In the illustrated embodiment, the staggered matching structure of the safety touch plate is arranged in the form of a protrusion and a recessed portion matching each other. Similarly, a plurality of protrusions on one safety touch plate and a recessed portion on another safety touch plate can be arranged, and the protrusions and the recessed portions are plugged in one-to-one. Moreover, the protrusions and the recessed portions are not limited to being arranged in the middle position of the end surface of the safety touch plate, but can also be arranged on its side. For example, one side edge of a safety touch plate protrudes outward in a step-like manner, and the corresponding side edge of the other safety touch plate is recessed inward in a step-like manner, as long as the staggered structure formed can stagger the two safety touch plates in a direction perpendicular to the car door.

[0028] The second improvement of the present invention is as follows Figure 4 As shown, a fixing frame assembly 6 is fixedly provided on the outside of the car door 1, and the fixing frame assembly 6 extends up and down along the door edge of the car door, and its length is greater than the length of the safety touch plate. The left and right sides of the fixing frame assembly 6 (i.e., the door opening and closing direction) are open, so that the safety touch plate 2 can pass through the fixing frame assembly 6 without affecting the normal operation of the safety touch plate 2 moving left and right. Figure 2 and 3As shown, the fixing frame assemblies 6 on the car doors 1 on both sides are arranged oppositely, and a clamping component 7 is arranged on the opposite surface. The clamping component 7 extends in the up and down direction of the car door, and its length basically corresponds to the safety touch plate. The clamping components 7 of the fixing frame assembly 6 on the same side are placed on both sides of the safety touch plate 2, and the clamping components 7 of the fixing frame assemblies 6 on both sides are arranged oppositely. When the car door 1 is closed, the clamping components 7 of the fixing frame assemblies 6 on both sides can cooperate and abut. When a soft obstacle is clamped between the car doors, the mutually abutting clamping components 7 can clamp the obstacle from both sides of the safety touch plate 2 to prevent the obstacle from further bending and deformation, which is conducive to applying resistance to the safety touch plate 2 and reducing the possibility of missed detection due to deformation of the obstacle. Anti-slip grooves can be set on the abutting surface of the clamping component 7 to improve its clamping effect.

[0029] The clamping component 7 can be made of elastic material, such as a rubber strip fixed to the fixing frame assembly 6, so that the clamping component can protrude from the edge of the car door to facilitate the clamping effect, and can be compressed and deformed when the car door is closed without affecting the closing of the car door.

[0030] Furthermore, if Figure 5 and 6 As shown, the clamping member 7 can be set to an inclined structure, and its outer end extends obliquely in the direction away from the safety touch plate 2. When the clamping members of the two side fixing frame assemblies 6 are in contact, they can produce elastic deformation and move in the direction away from the safety touch plate. As shown in the figure, if an obstacle 10 such as soft clothing is clamped between the elevator doors, when the elevator doors are closed and the clamping members of the two side fixing frame assemblies 6 just come into contact, the clamping members clamp the obstacle 10 from both sides of the safety touch plate. As the elevator doors are further closed, the clamping members are squeezed and deformed and move in the direction away from the safety touch plate. Figure 6 As shown, the clamped obstacle 10 is stretched, and wrinkled and bent clothing, thin ropes and other obstacles can be flattened to a certain extent, which is more conducive to touching and blocking the safety touch plate, further reducing the possibility of missed detection.

[0031] The fixing frame assembly 6 can be as follows Figure 4 and 5 As shown, it includes support slats 7 distributed on both sides of the safety touch plate 2, and the two ends of the two support slats 7 are connected by bolts 8. A support member such as a pillar (not shown in the figure) is provided between the two support slats 7, which can be arranged at the end of the support slats 7 or can be sleeved on the bolts 8. The fixing frame assembly 6 can be fixed to the car door 1 by bolts 8. If the fixing frame assembly 6 and the safety touch plate exceed the range of the door in the height direction of the door, the two support slats 7 can be connected by bolts 8, and the support slats 7 close to the car door can be fixed to the car door by another fixing bolt. In addition to the split structure of the fixing frame assembly 6 shown in the figure, it can also be set as an integral structure.

[0032] Adopted in safety touch panel Figure 1 When the swing arm assembly 5 moves in the manner shown, in order not to hinder the safety touch plate from swinging upward, the fixing frame assembly 6 should leave a certain space on the top of the safety touch plate to ensure the range of motion of the safety touch plate 2. The safety touch plate type anti-pinch detection structure of the present invention can also be provided with a folding mechanism 11 as in the prior art, which controls the safety touch plate to extend when the car door begins to close, and controls the safety touch plate to retract when the car door is fully closed. The retraction amplitude of the safety touch plate should be controlled so that it still protrudes from the edge of the car door and extends to the other side after the car door is completely closed. The specific structural form of the folding mechanism 11 can refer to the prior art, which is not the focus of the present invention and will not be described in detail.

[0033] The safety touch panel 2 of the present invention may be provided with a light curtain assembly, and a detection method combining contact and non-contact is adopted. Figure 2 In the embodiment shown, a light projector is provided in the safety touch panel on the left, and its light emitting point is arranged on the end surface of the raised portion 3. A light receiver is provided in the safety touch panel on the right, and its light sensing point is arranged on the bottom surface of the recessed portion 4. During the closing process of the elevator door, large obstacles are detected by the light curtain assembly, and obstacles of smaller size or transparent glass plates can be detected by the safety touch panel. Softer clothes and ropes can be detected by the safety touch panel through the clamping action of the clamping component. The anti-pinch detection structure can avoid the missed detection of foreign objects mixed in the elevator door and ensure the safety of taking the elevator.

[0034] The above description of the specific implementation mode is only used to help understand the technical concept and core idea of ​​the present invention. Although the technical solution is described and illustrated using a specific preferred embodiment, it should not be understood as a limitation of the present invention itself. Those skilled in the art may make various changes in form and details without departing from the technical concept of the present invention. These easily conceived changes or substitutions should all be included in the protection scope of the present invention.

Claims

1. A safety touch plate type anti-pinch detection structure for elevator doors, wherein safety touch plates (2) for detecting obstacles during the closing process of the elevator doors are provided on the outer side surfaces of the elevator car doors (1) on both sides, the upper and lower ends of the safety touch plates are respectively connected to the elevator car doors (1) through a swing rod assembly (5), and a micro switch assembly for detecting that the safety touch plate (2) is blocked by an obstacle and moves relative to the elevator car door is also provided on the elevator car door, characterized in that: The opposing surfaces of the safety touch plates (2) on the car doors (1) on both sides have a staggered structure that is staggered in a direction perpendicular to the car doors. When the car doors are in a closed state, the end surface of the safety touch plate (2) extends out of the edge of the car door on this side to the other side and is staggered with the safety touch plate on the other side through the staggered structure.

2. A safety touch plate anti-pinch detection structure for elevator doors as claimed in claim 1, characterized in that: A raised portion (3) is provided on the end surface of the safety touch plate (2) on one side of the car door (1), and a recessed portion (4) is provided on the end surface of the safety touch plate on the other side of the car door, wherein the raised portion and the recessed portion form the staggered structure.

3. The safety touch plate anti-pinch detection structure for elevator doors according to claim 1, characterized in that: A fixing frame assembly (6) extending vertically along the door edge of the car door is fixedly provided on the outer side of the car door (1); the left and right sides of the fixing frame assembly are open; the safety touch plate (2) passes through the fixing frame assembly (6) and can move left and right inside the fixing frame assembly; the fixing frame assembly (6) is fixedly provided with a clamping component (9) extending vertically on the part located on both sides of the safety touch plate (2); when the car door (1) is in a closed state, the clamping components (9) of the fixing frame assembly (6) on the car doors on both sides cooperate to abut against each other to clamp an obstacle between the two car doors.

4. A safety touch plate anti-pinch detection structure for elevator doors as claimed in claim 3, characterized in that: The clamping component (9) is made of elastic material, so that the clamping component protruding from the edge of the car door can abut and clamp without affecting the closing of the car door.

5. A safety touch plate anti-pinch detection structure for elevator doors as claimed in claim 4, characterized in that: The outer end of the clamping component (9) extends obliquely in a direction away from the safety touch plate (2), so that the abutting clamping components can move in a direction away from the safety touch plate based on their elastic deformation.

6. A safety touch plate anti-pinch detection structure for elevator doors as claimed in claim 4 or 5, characterized in that: The clamping component (9) is a rubber strip fixed on the fixing frame assembly (6).

7. A safety touch plate anti-pinch detection structure for elevator doors as claimed in claim 4 or 5, characterized in that: The abutting surface of the clamping component (9) is provided with anti-slip grooves.

8. The safety touch plate anti-pinch detection structure for elevator doors according to claim 3, characterized in that: The fixing frame assembly (6) comprises supporting strips distributed on both sides of the safety touch plate (2), a supporting member is provided between the two supporting strips, and is fixed to the car door (1) by bolts.

9. A safety touch plate anti-pinch detection structure for elevator doors as claimed in claim 8, characterized in that: The fixing frame assembly (6) leaves a space on the top of the safety touch plate for the safety touch plate (2) to move.

10. The safety touch plate anti-pinch detection structure for elevator doors according to claim 1, characterized in that: The safety touch panel (2) is provided with a light curtain assembly for sensing obstacles between the elevator car doors on both sides.

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