JP2011093702A - Object caught-in detecting system of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an object caught-in detecting system of an elevator for avoiding traveling of a car while an object is being caught in by a door of the elevator. <P>SOLUTION: This object caught-in detecting system is provided with: a monitoring camera for photographing a monitoring area set over a boarding-alighting port upper part of a landing hall from a car of the elevator; an image signal storage part for storing an image signal provided by the monitoring camera; a full closure time object caught-in detecting means for determining that an object is caught by the door when the continuous object is observed with a straight line formed of the distal end of a door panel as the origin when the door panel of the door is fully closed by a comparison with a normal time image signal when the object stored in the image signal storage part is not nipped by the door; and a door opening means for performing door opening operation when the detecting means detects caught-in of the object. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to object pinching detection, and more particularly to an object pinching detection system in an elevator door.

  When a person or an object is sandwiched between the elevator doors, the mechanical switch detects the sandwiched state and the door opening operation is performed. However, there is a risk of pinching at the time of failure such as contact failure of a switch or dropout due to loosening of a screw.

  In addition, a thin string-like object such as a string or a rope connecting a pet and an owner, or a finger of an infant may not be detected. When the elevator door closes and a string or rope that connects the pet and the user is sandwiched between the doors, the elevator is separated into a car and a landing, and when the car starts moving, both the pet and the user Can be dangerous. In particular, if the user is in a state where the strap is wrapped around the hand, the strap cannot be released immediately, so the pet may injure the neck, the user may fall, or the wrist may be injured. There is a possibility of accident.

  Therefore, as a method of detecting an object when the door is closed and stopping the elevator, light projecting means for outputting light in the vertical direction upward at the lower part of the entrance and exit and light output at the upper part of the entrance and exit are received. There has been proposed a method for determining that an object is sandwiched between doors when a light receiving means is provided and the light is blocked (see, for example, Patent Document 1).

  Moreover, when a string-like object is detected by a contact rod provided with a serrated groove, an elevator that prevents the elevator from operating is proposed (for example, see Patent Document 2).

  In addition, in order to avoid only a situation where a string such as a pet is pinched, an IC tag is attached to the string-like object, and an IC tag reader is provided in the cage to detect the string-like object, and all string-like objects are placed in the cage. It has been proposed to perform a door closing operation after confirming that an object is on board (see, for example, Patent Document 3).

JP 2008-169209 A JP 2008-297120 A JP 2009-35376 A

  In the method described in Patent Document 1, a device made up of a small sensor must be attached to a car sill groove provided at the lower part of the doorway, and a device made up of a microminiature infrared chip, a microminiature switch or the like must be attached to the upper part of the doorway. In addition, since the infrared rays are passed vertically when the door is fully closed, the shape of the rubber per door must be concave, and there is a problem that it takes a considerable amount of time for the renovation work for mounting to an existing elevator. is there.

  Moreover, in the method of patent document 2, since the contact rod provided with the sawtooth-shaped groove | channel is needed, time is required for repair work.

  In addition, in these two methods, the door must be fully closed in order to determine whether or not the door is pinched when the door is completely closed. Therefore, even if the object is always in contact with the front edge of the door panel from the start of the door closing operation, even if it is pinched by full closing, the door closing operation is interrupted and the door opening operation is started. There was a problem that could not be transferred.

  In the method described in Patent Document 3, it is an indispensable condition that an IC tag is attached to a string-like object, and it cannot be said that it is effective for all elevator users.

  Therefore, the present invention has been made to solve the above-described problems, and can be easily attached to an existing elevator. The object is not only when the elevator door is fully closed, but also when the door is closed. An object of the present invention is to provide an elevator object pinching detection system capable of reliably opening the door and avoiding a car traveling in a situation where pinching occurs.

  According to one aspect of the present invention, a monitoring camera that captures a monitoring area that is set from an elevator car to an upper entrance of a landing, an image signal storage unit that stores an image signal obtained by the monitoring camera, and When the door panel of the door is fully closed by contrast with the normal image signal in which the object stored in the image signal storage unit is not sandwiched between the doors, the straight line formed by the tip of the door panel is used as a base point. A fully-closed object pinching detection means that determines that the object is pinched by the door when an object is observed, and a door that opens when the object is pinched by the detection means There is provided an elevator object pinching detection system comprising an opening means.

  According to another aspect of the present invention, a monitoring camera that captures a monitoring area that is set from an elevator car to an upper part of a landing gate, and an image signal storage that stores an image signal obtained by the monitoring camera. And the image signal stored in the image signal storage unit, a continuous object is observed starting from the tip of the door panel of the door when the door is closed, and is sandwiched when the object moves in conjunction with the door closing operation. An elevator comprising: an object pinching detection means for determining that the object is caught, and a door opening means for performing a door opening operation when it is determined that an object is caught by the detection means. An object pinching detection system is provided.

  According to the present invention, in a situation where an object is caught not only when the elevator door is fully closed but also during the door closing, the door is surely opened to prevent the car from running, so that all elevator users can It is possible to safely provide a countermeasure when it is caught. In addition, it is easy to attach to an existing elevator, and the repair cost can be reduced.

It is a front view which shows the whole structure of the door of an elevator car. It is the figure which looked down at the door 2 side from the surveillance camera 3. FIG. It is a block diagram which shows the structure of the object pinching detection system which concerns on this embodiment. It is a flowchart which shows the flow of an object pinching detection process in this embodiment. It is a front view which concerns on 2nd Embodiment and shows the whole structure of the door of the elevator car. It is a front view which concerns on 2nd Embodiment and shows the whole structure of the door of the elevator car. It is a block diagram which shows the structure of the object pinching detection system which concerns on 2nd Embodiment. It is a flowchart which shows the flow of an object pinching detection process in 2nd Embodiment. It is a block diagram which shows the structure of the object pinching detection system which concerns on 3rd Embodiment. It is a flowchart which shows the flow of an object pinching detection process in 3rd Embodiment. It is a block diagram which shows the structure of the object pinching detection system which concerns on 4th Embodiment. It is a block diagram which shows the structure of the object pinching detection system which concerns on 5th Embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected about the same location and the overlapping description is abbreviate | omitted.

(First embodiment)
FIG. 1 is a front view showing the overall configuration of an elevator car door. In FIG. 1, 1 is an elevator car. The car 1 is provided with a door 2 that opens and closes in the horizontal direction when landing. The door 2 serves as an entrance / exit for an elevator user. A monitoring camera 3 is installed above the entrance / exit and above the boundary where the door 2 closes. The monitoring camera 3 continuously photographs the monitoring area 4 set in the elevator car 1 to the upper part of the entrance / exit of the hall from the upper part to the lower part at predetermined frame intervals. In the present invention, the entire panel that opens and closes when a passenger gets on is referred to as a “door”, and each panel that opens and closes is referred to as a “door”.

  FIG. 2 shows a view looking down on the door 2 side from the surveillance camera 3. The state of the door is fully closed, which shows a situation where an object is actually caught in the door 2. FIG. 2 shows a situation where the string-like object 5 is sandwiched in the monitoring area 4. A normal situation in which nothing is caught in the door 2 in the fully closed state of the door with the monitoring camera 3 is imaged in advance, and image information at that time is stored. The storage medium will be described later. A state in which the string-like object 5 as shown in FIG. 2 is caught is detected by comparing the normal image information with the image information in a situation where the object is caught in the door 2.

  Here, the “object to be detected” refers to an object that is continuously observed with a straight line from the front end of the door panel as a base point when the door is fully closed. Therefore, even if the object is continuously observed, the object that is not in contact with the door 2 is not determined to be pinched. For example, a bag, a strap, or the like that is a belonging of a passenger in the car is not determined to be pinched if it is not in contact with the door 2. Further, whether or not it is in contact with the door 2 is determined by the monitoring camera 3 without providing a separate sensor or the like.

  In the present embodiment, the case where the door is opened in the center has been described as an example. However, even in the case where the door is opened halfway, the object can be detected in the same manner by simply moving the installation position of the monitoring camera 3. That is, when the door is opened in the center, the door closing end is in the center (the center where the left and right doors hit is the center) due to the door closing operation, so the center of the installation position of the monitoring camera 3 is optimal. On the other hand, in the case of single opening, the door moves in one direction from left to right or from right to left, and the door closed end is the right end or the left end. Accordingly, in the case of one-sided opening, it can be dealt with by installing the monitoring camera 3 at either the right end or the left end.

  FIG. 3 is a block diagram illustrating a configuration of the object pinching detection system according to the present embodiment. This object pinching detection system is roughly composed of a monitoring device 20, a door opening means 24 when an object is pinched, and an elevator control device 25. The monitoring device 20 includes a monitoring camera 3, a signal conversion unit 21 that takes an image signal from the monitoring camera 3 and performs AD conversion, an image signal storage unit 22 that stores a digital signal, and a fully-closed object pinching detection unit 23. It is composed of The fully-closed object pinching detection means 23, for example, subdivides the monitoring area 4 by the monitoring camera 3 into a mesh pattern and compares it with the block image information at normal times (when no person or object exists near the door). By doing so, it can be configured. The door panel indicates which block is different among the compared blocks, the degree of connection of the different blocks, whether the door is moving while holding the connection by closing the door, etc. Determination can be made by comparing an image when detecting an object in contact with the image and an image after a few seconds or a continuous image until a few seconds later.

  When it is determined whether the object is pinched by the fully-closed object detection means 23, the door opening means 24 when the object is pinched determines whether it is necessary to open the door, A door opening command is output to the elevator control device 25 from the door opening means 24 when the object is sandwiched.

  Next, the flow of the object pinching detection process in such a configuration will be described.

  FIG. 4 is a flowchart showing the flow of the object pinching detection process in the present embodiment.

  First, a door closing operation (step S40) is performed, and a transition is made to a fully closed state (step S41) in which the door is completely closed. Next, in the fully closed state, it is determined whether or not the object is pinched in the door 2 in the door opening means 24 when the object is pinched (step S42). When it is determined that no object is caught, the elevator control device 25 is allowed to travel the elevator, and the elevator starts traveling (step S43).

  On the other hand, when it is determined that the object is caught, a door opening operation (step S44) is performed. Thereafter, returning to step S40, the door closing operation is performed, and when the object is not detected again, the elevator starts traveling.

  According to the first embodiment, the presence or absence of continuously observed objects is confirmed using the image of the surveillance camera installed at the upper part of the entrance / exit, with the straight line at the front end of the door panel as the base point. By performing the door opening operation when it is determined that an object has been pinched, it is possible to avoid the car traveling with the object pinched.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the second embodiment, when an object moving in conjunction with the door closing operation is detected while the door is closed, it is determined that the object is likely to be pinched by full closing, and the door opening operation is performed. It is.

  FIGS. 5 and 6 are front views showing the overall configuration of the elevator car door 2 according to the second embodiment. FIG. 5 shows the door 2 that has started to close, and 6a and 6b are the front ends of the door panel. A string-like object 5 extends along the door panel tip 6a from the landing to the car.

  FIG. 6 shows a state immediately before the door 2 is fully closed by the door closing operation. The string-like object 5 extending into the car 1 along the door panel front end 6a in FIG. 5 is moving in conjunction with the door performing the door closing operation. An image when an object in contact with the front end 6a of the door panel is detected is compared with an image after a few seconds or a continuous image until a few seconds later. When an object extending into the car along the door panel tip 6a and the door panel tip 6a is confirmed in both or all of the comparison target images, the object being observed is sandwiched by closing the door and closing the door as it is. The door opening operation is performed.

  For example, the operation under the condition that the door is centrally opened and the width of the car entrance is 800 mm will be described. In the case of the standard door closing speed, it takes about 2.5 seconds from the start of the door closing operation to the full closing. An image when an object in contact with the door panel front end 6a is detected is compared with an image 0.5 seconds after the detection. When the door panel tip and an object extending into the car along the door panel tip are confirmed in both images, the door opening operation is performed. Although it depends on the point of time when the object is detected, if 0.5 seconds have passed after the detection, the door will close about 80 mm. By giving such a time margin, it is possible to determine without detection that the object moves in conjunction with the door.

  The above condition is an example, and the time required for door closing varies depending on whether the door is centrally opened or partially opened, the width of the entrance / exit, the speed of the door to be closed, and the like. In some cases, it may be appropriate to make the image to be compared with the time of object detection faster or slower than after 0.5 seconds because the time required to fully close is changed. Depending on the specification conditions of the elevator, the position of the front end of the door panel to be compared can be set, for example, by speeding up the image to be compared with after object detection. In addition, since the image to be compared with the image at the time of detection can be set so that three or more images or all intermittent or continuous images are targeted, various selections can be made depending on the conditions and specifications of the elevator. It becomes possible.

  FIG. 7 is a block diagram illustrating a configuration of an object pinching detection system according to the second embodiment. As shown in FIG. 7, the monitoring device 20 includes a monitoring camera 3, a signal conversion unit 21 that takes an image signal from the monitoring camera 3 and performs AD conversion, an image signal storage unit 22 that stores a digital signal, and a door closure. The middle object is sandwiched by detecting means 26. It is determined whether the object is highly likely to be caught while the door is closed by the detection means 26 during the door closing. Depending on the result of the determination, the door opening means 24 when the object is sandwiched determines whether the door needs to be opened. When it is determined that the door is opened, a door opening command is output from the door opening means 24 when the object is caught to the elevator control device 25.

  Next, the flow of the object pinching detection process in such a configuration will be described. FIG. 8 is a flowchart showing the flow of the object pinching detection process in the present embodiment.

  First, a door closing operation is started (step S80), and immediately after that, an object linked to the door to be closed is detected (step S81). When an object is not detected, it transfers to the fully closed state (step S82) which is the state which closed the door completely. Next, the elevator starts traveling (step S83). On the other hand, when an object interlocked with the door is detected in step S81, a door opening operation (step S84) is performed, and the process returns to step S80.

  According to the second embodiment, when a door closing operation is started, there is an object extending into the car along the front end of the door panel, and a situation is observed such as movement in conjunction with the door closing operation. Then, it is determined that the object is likely to be caught, and the door opening operation is performed. Unlike the first embodiment in which determination is made after an object is actually pinched, pinching can be avoided in advance.

  With mechanical switches, string-like objects are difficult to detect, but other than that, it may not be possible to detect because the hand is small and soft, such as when an infant is touching the edge of the door panel while the door is closed There is sex. However, according to the second embodiment, even a mischievous act of a child with such a danger can be avoided before an accident occurs.

(Third embodiment)
Next, a third embodiment of the present invention will be described. As described above, in the first embodiment, since an object that is continuously observed from the base point of the front end of the door panel is detected at the moment when the door is closed, even in a situation where there is a high possibility that pinching will occur. If the door is not fully closed, the door open command is not output. Further, in the second embodiment, if an object observed continuously is not interlocked with the door closing operation, it is not determined that the object is pinched. Therefore, when an object not in contact with the door closing end is confirmed or When an object is confirmed immediately before full closing, the door opening command is not output even if pinching occurs.

  In the third embodiment, by combining the features of the first embodiment and the features of the second embodiment, it is possible to detect when the door is closed and when the door is fully closed, from the start of the door closing operation to the fully closing. Is set as the detection range.

  FIG. 9 is a block diagram illustrating a configuration of an object pinching detection system according to the third embodiment.

As shown in FIG. 9, the monitoring device 20 includes a monitoring camera 3, a signal conversion unit 21 that takes an image signal from the monitoring camera 3 and performs AD conversion, an image signal storage unit 22 that stores a digital signal, and a fully closed state. It is composed of an object pinching detection means 23 and an object pinching detection means 26 while the door is closed. In the third embodiment, both the fully-closed object pinching detection means 23 and the door-closed object pinching means 26 are provided in the subsequent stage of the image signal storage unit 22 so that the actual pinching may or may occur. When a high situation occurs, if one of them is detected to be pinched or it is determined that there is a high possibility that pinching will occur, a door opening command is output by the door opening means 24 when the object is pinched. When it is determined that the door is opened, a door opening command is output from the door opening means 24 when the object is caught to the elevator control device 25.

  Next, the flow of the object pinching detection process in such a configuration will be described. FIG. 10 is a flowchart showing the flow of the object pinching detection process in the present embodiment.

  First, immediately after the door opening operation (step S100) is started, it is determined whether or not an object linked to the door closing operation has not been detected (step S101). If no object is detected, the door closing operation is continued and the state is shifted to the fully closed state (step S102). Next, it is determined whether or not pinching has occurred (step S103). If it is determined that no jamming has occurred, the elevator starts to travel (step S104).

  On the other hand, when an object interlocked with the door closing operation is detected in step S101 and when it is determined in step S103 that pinching has occurred, a door opening operation (step S105) is performed, and the process returns to step S100.

  According to the third embodiment, it is possible to detect pinching while the door is closed and when the door is fully closed, and it is possible to set a detection range between the start of the door closing operation and the full closing.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. FIG. 11 is a block diagram illustrating a configuration of an object pinching detection system according to the fourth embodiment. This object pinching detection system is roughly composed of a monitoring device 20, a door opening means 24 when an object is pinched, a door opening extension means 27 when an object is pinched, and an elevator control device 25. The monitoring device 20 includes a monitoring camera 3, a signal conversion unit 21, an image signal storage unit 22, a fully-closed object pinching detection unit 23, and a door-closed object pinching detection unit 26.

  In the fourth embodiment, when it is determined that a door opening operation is necessary due to a situation where an object is caught or a situation occurs, a door opening command is output in the door opening means 24 when the object is sandwiched. At that time, the door opening extension means 27 when the object is sandwiched is provided. The door opening extension means 27 when the object is pinched is instructed to extend the door opening time when the door closing operation is performed by the object closing detection means 23 and the object closing detection means 26 when the object is fully closed. Output.

  As described above, according to the first to fourth embodiments, when pinching is detected, in the case of an object that can be moved immediately or a string-like object, it is pinched again by performing a door opening operation. Can be avoided. However, if a passenger with a pet is divided into a car and a landing, and a string that connects the pets is pinched by the door, it cannot move to either side during the normal opening time, and the door closing operation and the door again. There is a possibility of opening operation. If there are other users in the car or the hall, it is possible to have the door open button pushed, but when alone, the door is closed and a temporary panic occurs due to the string being pinched. There is a possibility that the user cannot easily press the door open button in situations such as forgetting to press the door open button or having both hands closed with both pets. Therefore, in the fourth embodiment, when the door-opening operation is performed by the fully-closed object pinching detection means 23 and the door-closed object pinching detection means 26, the door opening time is extended. The extension time can be set as appropriate.

  According to the fourth embodiment, by extending the door opening time, a passenger who has a pet as described in the embodiment, a passenger who has fallen into a panic state or a passenger who has a plurality of pets. It will be possible to get on and off with a margin.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. FIG. 12 is a block diagram illustrating a configuration of an object pinching detection system according to the fifth embodiment. This object pinching detection system is roughly classified into a monitoring device 20, a door opening means 24 when an object is pinched, a door opening extension means 27 when an object is pinched, an elevator control device 25, and a door opening operation counter. 28, an abnormality determination means 29, a remote monitoring terminal 30, and a monitoring center 31.

  In the fifth embodiment, the door opening operation counter 28 and the abnormality determination means 29 are determined when the door opening means 24 outputs a door opening command when it is determined that the door is open and the door opening is necessary. Is provided.

  The door opening operation counter 28 counts how many times the door opening operation is repeated until the car stops on the floor, opens and closes the door, and travels.

  For example, when the pinch is detected and the door opening operation is performed, the abnormality determination unit 29 sets a flag and counts the number of times, and the count value by the door opening operation counter 28 is a constant value, for example, 5 It is determined that an abnormality has occurred when the number of times is exceeded. Logic for making such a determination can be provided in a control unit, a microcomputer, or the like. The constant value can be changed as appropriate.

  If the abnormality determination means 29 determines that an abnormality has occurred, pinching has occurred continuously and it is necessary to respond immediately. Such factors include, for example, mischief and device abnormalities. Therefore, a signal is sent to the remote monitoring terminal 30 attached to the elevator to inform the monitoring center 31 that the abnormality determining means 29 has determined that “the jamming has occurred continuously”. Information transmission may be performed by a monitoring facility or the like existing in the building. In addition, information such as “presence / absence of car call” and “presence / absence of person” may be transmitted.

  With such a configuration, the door closing operation is performed again after the fully-closed object pinching detection means 23 and the door-closing object pinching detection means 26 and the door closing operation is performed again. The above operation is repeated until it can be confirmed. When the door is repeatedly opened and closed several times on the same floor, it is determined that an abnormality has occurred in any part of the elevator apparatus, and a notification is sent to the monitoring center.

  When the operation of continuously opening and closing the door is performed, there is a possibility of malfunction due to an abnormality of the device. In addition, there is a possibility that a passenger with a plurality of pets cannot handle alone. In addition, there is a possibility that mischief acts are carried out between the car and the hall. By transmitting information to such a situation to the monitoring center, it is possible to send a worker to the site and check the situation including the presence or absence of abnormality.

  According to 5th Embodiment, when the operation | movement which repeats door closing and door opening is performed in multiple times continuously on the same floor, it determines with this being abnormal and notifies a monitoring center. Because there is a possibility of malfunction due to equipment malfunction, mischief, etc., it is possible to improve operating efficiency by sending workers to the site and checking the situation.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 ... Car 2 ... Door 3 ... Surveillance camera 4 ... Monitoring area 5 ... String-like object 6a ... Door panel front-end | tip 6b ... Door panel front-end | tip 20 ... Monitoring apparatus 21 ... Signal conversion means 22 ... Image signal memory | storage part 23 ... Object pinched | closed when fully closed Detecting means 24 ... Door opening means 25 when an object is pinched ... Elevator control device 26 ... Object pinching detection means 27 during door closing ... Door opening extension means 28 when an object is pinched ... Door opening operation counter 29 ... Abnormality determining means 30 ... Remote monitoring terminal 31 ... Monitoring center

Claims (5)

A surveillance camera that captures a surveillance area set from the elevator car to the upper entrance of the hall;
An image signal storage unit for storing an image signal obtained by the monitoring camera;
When the door panel of the door is fully closed by contrast with a normal image signal in which the object stored in the image signal storage unit is not sandwiched between the doors, the straight line formed by the tip of the door panel is used as a base point. A fully-closed object pinching detection means for determining that the object is pinched by a door when a typical object is observed;
An elevator object pinching detection system comprising door opening means for performing a door opening operation when an object pinching is detected by the detection means. A surveillance camera that captures a surveillance area set from the elevator car to the upper entrance of the hall;
An image signal storage unit for storing an image signal obtained by the monitoring camera;
By the image signal stored in the image signal storage unit, a continuous object is observed starting from the tip of the door panel of the door when the door is closed, and pinching occurs when the object moves in conjunction with the door closing operation. A detection means for pinching an object while the door is closed,
An elevator object pinching detection system comprising door opening means for performing a door opening operation when it is determined that an object pinching occurs by the detection means. A surveillance camera that captures a surveillance area set from the elevator car to the upper entrance of the hall;
An image signal storage unit for storing an image signal obtained by the monitoring camera;
When the door panel of the door is fully closed by contrast with a normal image signal in which the object stored in the image signal storage unit is not sandwiched between the doors, the straight line formed by the tip of the door panel is used as a base point. A fully-closed object pinching detection means for determining that the object is pinched by a door when a typical object is observed;
Based on the image signal stored in the image signal storage unit, a continuous object is observed from the tip of the door panel when the door is closed, and it is determined that the object is pinched when the object moves in conjunction with the door closing operation. Detecting means for pinching an object while the door is closed;
A door opening means for performing a door opening operation when it is detected that the object is caught by the fully closed object detection means or when it is determined that the object is caught by the object detection means during the door closing. An elevator object pinching detection system characterized by comprising:   The elevator object according to any one of claims 1 to 3, further comprising door opening extension means for extending a door opening time when the elevator is opened by the door opening means. Pinch detection system. When the elevator is opened by the door opening means, a door opening operation counter that counts the number of times the door is opened,
An abnormality determining means for determining that an abnormality occurs when the door opening operation counter detects door opening more than a certain number of times;
5. The elevator object sandwiching according to claim 1, further comprising a reporting unit that reports to a monitoring facility that monitors an elevator when the abnormality determining unit determines that an abnormality has occurred. Detection system.

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