KR20060032560A - A burglarproof device for an outdoor establishment - Google Patents

Abstract

The present invention relates to an outdoor facility anti-theft device. The present invention is to install a detection line 110 horizontally around the fence to prevent theft of the goods stored in the fence of the crop or outdoor facilities, the first detection device for detecting the movement of the detection line 110 140 and a second sensing device 170 for detecting whether the sensing line 110 is cut.

Outdoor facilities, reed switch, magnetic sensor, weight, sensing wire, cutting, alarm device, limit switch, multi contact limit switch

Description

Anti-theft device for outdoor facilities {A burglarproof device for an outdoor establishment}

1 is a partially cutaway perspective view schematically showing a security device of the prior art using a coil spring as a means for pulling a detection line,

Figure 2 is an exploded perspective view schematically showing a security device of the prior art using a weight as a means for pulling the detection line,

3 is a use state diagram schematically showing a state in which a detection line of an outdoor facility anti-theft device according to the present invention is installed on a fence.

Figure 4 is a perspective view schematically showing an outdoor facilities anti-theft device according to an embodiment of the present invention,

FIG. 5 is an exploded perspective view schematically showing an outdoor facility anti-theft device according to an embodiment of the present invention.

6 is an operating state diagram schematically illustrating a state in which a second sensing device operates when cutting a sensing line in an anti-theft device for outdoor facilities according to an exemplary embodiment of the present invention.

7 is a perspective view schematically showing a limit switch used as a second sensing device according to a second embodiment of the present invention;

8 is an operating state diagram schematically showing an operating state of a limit switch used as a second sensing device according to a second embodiment of the present invention.

FIG. 9 is an operating state diagram schematically illustrating a state in which a first sensing device and a second sensing device, which are configured based on a principle of a magnetic sensor, are installed together inside of a main body according to a third embodiment of the present invention.

FIG. 10 is a diagram schematically illustrating an outdoor facility anti-theft device implemented as a multi-contact limit switch according to an embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

100: security device 110: detection line

111: detection line fixing device 112: magnet portion fixing means

113: switch detecting unit fixing means 120: main body

121: roller 130: weight

140: first detection device 141: first lead switch unit

142: first magnetic part 150: alarm device

151: warning lights 152: alarm sound generator

160: coil spring 170: second detection device

171: second lead switch portion 172: second magnet portion

181: limit switch 182: contact connecting means

183: second weight 190: multi-contact limit switch

191: switch body 192: switch detection unit

The present invention relates to a device for preventing theft of outdoor facilities, and more particularly, to install a detection line to prevent theft of articles stored in the fence of crops or outdoor facilities and stored inside the fence, and to invade an external invader by the movement of the detection line. The present invention relates to a device for preventing theft of outdoor facilities.

Since items stored outdoors can cause intruders from all directions, there must be an on-site monitor or use a separate security device to prevent theft of items stored outdoors.

In order for the monitor to reside in the open air, a separate facility for the monitor to reside will be required, and labor costs will be high. Therefore, a certain fence should be installed in the open air and the inside of the fence can be monitored with an infrared sensor. It was to notify the occurrence. However, the infrared sensor as described above can be easily used in a closed building, a lot of malfunctions occur in the outdoors in poor environmental conditions, there was a problem that takes a lot of initial installation cost.

In order to solve the above problems, a detection line is formed in a fence as is known, and on one side of the detection line, a reed switch part and a magnetic part of a magnetic sensor are formed in close contact with each other. When the reed switch part and the magnetic part are separated from each other due to the movement, a security device is used to operate the alarm device.

In the above-described security device, a coil spring was used as a means for pulling the sensing wire with a constant force.

1 is a partial cutaway perspective view schematically showing a conventional security device using a coil spring as a means for pulling a sensing line.

As shown in FIG. 1, the coil spring 160 pulls the sensing wire 110 with a constant force at all times while keeping the reed switch portion and the magnetic portion of the magnetic sensor 140 close to each other. When the tensile force of the) is loosened and malfunction occurs, the magnetic wire (160) is pulled by the coil spring 160 with a constant tensile force, so the magnetic sensor 140 moves when the sensing line 110 moves away from the magnetic sensor 140. There is a problem that the 140 does not detect. In addition, when using the coil spring 160, there is a difficulty that the user can not arbitrarily adjust the tensile force.

In order to solve the above problems, the present inventors use the weight of the agricultural and outdoor facilities security device using a weight without using the coil spring 160 as a means for pulling and supporting the sensing line 110 with a constant force. It was filed in advance through 2003-52356 (utility model registration double application 2003-24476).

Figure 2 is an exploded perspective view schematically showing a security device of the prior art using a weight as a means for pulling the detection line.

As shown in Figure 2, the agricultural and outdoor facilities security device according to the 2003-52356, the roller 121 is fixed to the inside rotatably, the body 120 is formed with a cover on one side, and the main body In the roller 121 of the 120, the direction of movement is vertically bent, part of which extends to the bottom, and the other part of the sensing line 110 is installed horizontally on the fence, and the end extending to the bottom of the sensing line 110 Weight 130 is fixed to the pulling the sensing line 110 with a constant force, the sensing device 140 for detecting the movement of the sensing line 110 in the interior of the main body, the sensing device 140 is detected by It comprises an alarm device 150 to identify the signal from the outside.

According to the 2003-52356, because the weight 130 operates the sensing device 140 while pulling the sensing line 110 at a constant weight, a malfunction phenomenon caused by a drop in tension of the coil spring, or the sensing device 140. When the sensing line 110 is moved in the distance far from and compensated the problem that the sensing device 140 did not detect.

According to the security device using the coil spring and Korean Patent Application No. 2003-52356, when the sensing line 110 is moved, the magnet part of the sensing device 140 and the reed switch are configured to operate the alarm device while being spaced apart from each other. However, when the external intruder cuts the detection line, the security device of the structure, which detects only the movement of the detection line 110, may not detect this.

The present invention has been made to solve the above-mentioned problems of the prior art, in the outdoor facility anti-theft device in addition to the case that the external intruder moved the detection line, even if the detection line cut the detection and operating the outdoor facilities by operating the alarm device Its purpose is to prevent theft of goods stored in it.

In order to achieve the above object, the present invention is a roller is rotatably fixed to the inside, one side of the main body is formed with a cover, the direction of movement is vertically bent in the roller of the main body is partially extended to the lower portion, The sensing line is installed horizontally on the fence, the weight is fixed to the end extending to the lower end of the sensing line and pulling the sensing line with a constant force, and the first sensing device installed to detect the movement of the sensing line in the body; In the outdoor facility anti-theft device comprising an alarm device for identifying the signal detected by the first detection device from the outside, installed in the outside of the main body to detect this when cutting the detection line and to operate the alarm device Characterized in that it further comprises a second sensing device to make.

In addition, the second sensing device of the present invention, in the position where the sensing line falling in an arc around the sensing line fixing device when the sensing line horizontally installed in the outdoor facility is in contact with the main body, the second outside the main body The reed switch unit is fixed, and the second magnetic part is fixed to the sensing line installed horizontally, the distance between the second lead switch unit from the sensing line fixing device and the distance of the second magnetic part from the sensing line fixing device are equal. It is characterized by being installed.

In addition, the second sensing device of the present invention is characterized by including a limit switch.

In addition, the first sensing device and the second sensing device of the present invention are installed at a predetermined interval in the vertical direction of the sensing line extending in the vertical direction inside the main body, respectively, wherein the first sensing device and the second sensing device are And a reed switch, wherein a magnet part is located between the first sensing device and the second sensing device, and the magnet part is fixed to the sensing line so that the magnetic part moves together with the movement of the sensing line. The second detection device and the magnet portion is characterized in that the alarm device is configured to operate by generating an electrical signal when the junction.

In addition, the first sensing device and the second sensing device of the present invention, a multi-contact limit switch that can detect the movement of the upper and lower direction of the sensing line is used, the sensing unit of the multi-contact limit switch is fixed to the sensing line The sensing line moves together in the direction of movement, and generates an electrical signal in the switch body according to the direction of movement of the sensing unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating a state in which a sensing line of an outdoor facility anti-theft device according to the present invention is installed in a fence.

As shown in FIG. 3, the present invention has a sensing line 110 installed in a horizontal direction around a fence installed outdoors, and a security device 100 is installed at an end of the sensing line 110. It is configured to detect the movement and cutting of the 110, and to operate the alarm device 150 when an external intruder occurs. It is preferable to use two security devices 100 formed around the fence as shown in Figure 3, but one by one installed on one side or divided into two or more security devices 100 on one side installed It is also possible.

In the anti-theft device of the outdoor facility having the configuration as described above, in addition to the first detection device provided to detect whether the detection line is moved, the second detection device provided to detect whether the detection line 110 is cut is installed. It will be described through various embodiments.

4 is a perspective view schematically showing an outdoor facilities anti-theft device according to an embodiment of the present invention, Figure 5 is a schematic exploded view of the outdoor facilities anti-theft device according to an embodiment of the present invention Perspective view.

As shown in Figure 4 and 5, the end of the sensing line 110 provided around the fence is introduced into the main body of the crime prevention apparatus 100. The roller 121 is rotatably formed inside the main body 120 through which one end of the sensing line 110 flows, and the detection line 110 is installed horizontally on the fence. The direction of the sensing line 110 is turned downward by bending vertically inward.

The sensing line 110 is changed to the lower direction by the roller 121 formed inside the main body 120 and is extended to the lower part of the main body 120 and is discharged to the lower part of the main body 120. The end of the line 110 is fixed to the weight 130 having a constant weight.

As described above, the sensing line 110 having the weight 130 formed at the bottom thereof is pulled with a constant tension around the fence by a force pulled by the weight of the weight 130.

The sensing line 110 has a constant tension by the weight 130, the first sensing device inside the main body 120 to detect the movement of the sensing line 110 as shown in FIG. 140 is formed.

The first sensing device 140 is connected to the sensing line 110 introduced into the main body 120, the first magnetic portion 142 and the first magnetic portion 142 is fixed to the weight ( The first lead switch unit 141 of the first sensing device 140 is fixed to a corresponding position of the main body 120 fixed by the weight of the 130. In addition, the sensing line 110 is introduced into the main body 120 so that the position fixed by the weight 130 is not misaligned at the position where the first magnetic portion 142 and the first lead switch unit 141 correspond. The sensing line fixing device 111 is formed at the position.

As shown in Figure 4 and 5, in the outdoor facility anti-theft device according to the present invention, the present invention is to cut the sensing line 110 and to detect an external intruder invading the outdoor facility main body 120 It comprises a second sensing device 170 on the outside of the.

In the above, the second sensing device 170 includes a second lead switch part 171 and a second magnetic part 172. The second lead switch unit 171 is fixed to a surface on which the sensing line 110 flows into the outside of the main body 120 and is located at a lower end of the sensing line 110. The second magnetic part 172 is installed on the sensing line 110 horizontally installed in the outdoor facility and the installed position is a length in which the second lead switch unit 171 is installed around the sensing line fixing device 111. The sensor line 110 is fixed to the sensing line 110 at a position away from the sensing line fixing device 111. This is such that when the sensing line 110 is cut by the external intruder, the second magnet part 172 is joined to the second lead switch part 171 fixed to the main body 120.

As described above, the first detecting device 140 installed inside the main body 120 to detect the movement of the sensing line 110 and the outside of the main body 120 to detect whether the sensing line 110 is cut. The second detection device has a configuration connected to the alarm device 150.

The alarm device 150, which is connected to the first sensing device 140 and the second sensing device 170 to identify the operation of the sensing line 110 from the outside, may be connected to the warning light 151 or the hearing. It is preferable to form the alarm sound generator 152 to be identified.

The present invention made of the configuration as described above is usually installed so that the sensing line 110 is installed around the fence to maintain a horizontal, at one end of the sensing line 110 by a constant weight always by a weight 130 Is pulled.

The first lead switch unit 141 is fixed to the inside of the main body 120 as shown in FIG. 4 in the main body 120 through which the sensing line 110 is pulled by a constant force by the weight 130. The first magnet part 142 fixed to the sensing line 110 is fixed to match.

In order to approach the crops or facilities protected in the fence, such as the security device 100 is installed in order to penetrate the outside from the outside to cross the fence in order for the intruder to directly pass around the fence detection line 110 ) Up or down to break in. The sensing line 110 is pulled by the intruder when the sensing line 110 is lifted up or down, and the sensing line 110 is pulled by the intruder. Rises by 110).

When the weight 130 is raised while the sensing line 110 is pulled, the first magnet part 142 fixed to the sensing line 110 at the same position as the first lead switch unit 141 inside the main body 120. Is raised together with the sensing line 110, a signal generated when the positions of the fixed first lead switch unit 141 and the moved first magnetic portion 142 are crossed with each other are the first lead switch unit 141. The first detection device 140, which consists of the first magnet part 142, is transmitted to the alarm device 150. In this case, the sensing line 110 is not pulled further when the weight 130 is caught by the main body 120.

In the alarm device 150 that receives a signal generated while the first magnetic part 142 and the first lead switch part 141 of the first sensing device 140 are spaced apart from each other, the warning light 151 and the hearing which are visually identified are observed. The alarm sound generator 152, which is identified as being operated, notifies that an intruder has been generated inside the fence.

As described above, the sensing line 110 pulled by the intruder is pulled again with a constant force by the weight of the weight 130 fixed to the end of the sensing line 110 and the tension is fixed around the fence while removing the pulling force. Is pulled.

In the above, when an external intruder approaches the crop or facility protected in the fence, when the detection line 110 is raised or lowered to cross the fence, the first intruder 140 detects the alarm and the alarm device 150. It worked. However, when an external intruder cuts the detection line 110 and then intrudes into an outdoor facility including a fence, the first intruder 140 does not detect this.

6 is an operating state diagram schematically illustrating a state in which the second sensing device operates when cutting the sensing line in the anti-theft device for outdoor facilities according to the first embodiment of the present invention.

As shown in FIG. 6, when the sensing line 110 is installed horizontally, the tensile force acting on the sensing line 110 is lost, and the weight of the second magnetic part 172 installed on one side of the sensing line 110 is lost. According to the cut detection line 110 falls.

When the sensing line 110 cut in the above falls, the second magnetic part 172 falls in an arc around the sensing line fixing device 111. At this time, the sensing line fixing device 111 and the second magnet so that the second magnetic portion 172 fixed to the sensing line 110 and the second lead switch unit 171 fixed to the main body 120 can be bonded. The distance at which the portion 172 is fixed and the distance at which the sensing line fixing device 111 and the second lead switch unit 171 are fixed are equally provided.

The signal generated when the detection line 110 is cut and the second lead switch unit 171 and the second magnetic part 172 are bonded is transmitted to the alarm device 150, and the alarm device 150 visually identifies the signal. The warning light 151 and the alarm sound generator 152 identified by hearing are operated to notify that an intruder has been generated inside the fence.

The second sensing device 170 is composed of the principle of the magnetic sensor consisting of the second lead switch unit 171 and the second magnetic portion 172, the second sensing device 170 uses a limit switch It may also be configured.

7 is a perspective view schematically illustrating a limit switch used as a second sensing device according to a second embodiment of the present invention, and FIG. 8 is a limit switch used as a second sensing device according to a second embodiment of the present invention. The operation state diagram schematically showing the operation state of.

As shown in FIG. 7 and FIG. 8, in order to use the limit switch 181 as the second sensing device 170, contact connecting means 182 is further provided to secure a wider contact area. The contact connecting means 182 extends to the contact portion of the limit switch 181 and maintains a shape that is horizontally bent to secure a wide area detected by external contact.

The limit switch 181 is installed in the main body 120, and the contact connecting means 182 connected to the limit switch 181 is exposed to the outside through the main body 120. It is provided with a predetermined through-hole so that the contact connecting means 182 can pass through.

Part of the contact connecting means 182 is exposed to the outside of the main body 120 and the direction is bent horizontally, the second weight 183 is fixed to one side of the sensing line 110 when cutting the sensing line 110 While contacting the contact connecting means 182 horizontally bent while falling, the second weight 183 falls and the force applied to the contact connecting means 182 is transmitted to the limit switch 181 to generate an electrical signal The electrical signal generated above is transmitted to the alarm device 150 to operate the warning lamp 151 and the alarm sound generator 152.

In the first and second embodiments described above, the first sensing device 140 is installed inside the main body 120, and the second sensing device 170 is installed outside the main body 120. However, a method of installing the first sensing device 140 and the second sensing device 170 together inside the main body 120 may be implemented.

FIG. 9 is a diagram schematically illustrating a state in which a first sensing device and a second sensing device, which are configured based on a principle of a magnetic sensor, are installed together in an interior of a main body according to a third embodiment of the present invention.

As shown in FIG. 9, according to an embodiment of the present invention, the first lead switch unit 141 and the second lead switch in the up and down directions of the sensing line 110 extending in the vertical direction in the main body 120. The part 171 is provided at a predetermined distance, and the magnet part 142 is disposed on the sensing line 110 extending in the vertical direction between the first lead switch part 141 and the second lead switch part 171. It is fixedly installed. In addition, according to the method of fixing the sensing line 110 and the magnet portion 142 may be further included a magnet portion fixing means 112.

At this time, in the first embodiment or the second embodiment, the first lead switch unit 141 fixed by the weight 130 by applying the first sensing device 140 to detect the movement of the sensing line 110. And a sensing line fixing device 111 at a position where the sensing line 110 flows into the main body 120 so that the position of the first magnetic portion 142 is not misaligned. However, according to the third exemplary embodiment, a sensing line between the first lead switch unit 141 for detecting the movement of the sensing line 110 and the second lead switch unit 171 for detecting whether the sensing line 110 is cut off ( Since the 110 and the fixed magnet part 142 must move, the sensing line fixing device 111 is not used according to the present embodiment.

In addition, in the above, the magnet part 142 is marked on the part where the sensing line 110 flows into the main body 120 so that the magnet part 142 is located in the middle part between the first lead switch part 141 and the second lead switch part 171. A check was made through the means, and after the maintenance and reinstallation of the security device to facilitate the positioning of the magnet part 142.

As described above, when the external intruder pulls the sensing line 110 in accordance with an embodiment of the present invention, the magnet part 142 is bonded to the first lead switch unit 141 and cuts the sensing line 110. In this case, the magnet part 142 is joined to the second lead switch part 171. Electrical signal generated when the magnet part 142 is joined to the first lead switch unit 141 or the second lead switch unit 171 when the sensing line 110 is moved or the cutting line 110 is cut. Configure to be delivered to the alarm device 150.

In the first or second embodiment, when the first magnetic part 142 and the first lead switch unit 141 of the first sensing device 140 are joined to each other and the sensing line 110 moves, the first magnetic part 142 is connected to the first magnetic part 142. While the magnet part 142 and the first lead switch unit 141 are spaced apart from each other, the alarm device 150 operates, but according to the third embodiment, the first lead switch unit 141 of the first sensing unit 140 is operated. ) And the second lead switch unit 171 is configured to operate when bonded in a structure in which the magnet portion 142 is separated.

In the first to third embodiments described above, a magnetic sensor is used as the first sensing unit 140 and the second sensing unit 170. However, in order to detect the movement and cutting of the sensing line extending vertically in the main body 120, a multi-contact limit switch capable of switching both the upward direction and the downward direction may be applied.

FIG. 10 is a diagram schematically illustrating an outdoor facility anti-theft device implemented as a multi-contact limit switch according to an embodiment of the present invention.

As shown in FIG. 10, according to a first embodiment of the present invention, the multi-contact limit switch 190 is configured to detect a rising direction and a downward direction of a sensing line 110 extending in a vertical direction inside the main body 120. The multi-contact limit switch 190 is connected to the switch main body 191 including a contact portion, and connected to the switching object to detect the movement and transfer the movement to the switch main body 191 to perform a contact function The switch sensing unit 192 is formed. In addition, the switch detecting unit fixing means 113 may be used according to a method of fixing the switch detecting unit 192 and the sensing line 110 of the multi-contact limit switch 190.

Since the multi-contact limit switch 190 detects the movement of the sensing line 110 extending in the vertical direction in the main body 120, the movement of the sensing line 110 in the main body 120 is freely up and down. Should be To this end, the sensing line fixing device 111 that limits the movement of the sensing line 110 flowing into the main body 120 is not installed.

In addition, since the switch detecting unit 192 of the multi-contact limit switch 190 is fixed to the sensing line 110 extending vertically inside the main body 120, the sensing line 110 flows into the main body 120. The part was checked through the display means, thereby making it easy to install the detection line 110 and the multi-contact limit switch 190 during the maintenance and reinstallation of the crime prevention device.

As described above, when the external intruder pulls the sensing line 110 in accordance with an embodiment of the present invention, the sensing line 110 extending in the vertical direction inside the main body 120 moves in the upward direction and the sensing line above. The switch detection unit 192 fixed to 110 also moves together according to the direction of movement of the detection line 110. In addition, when the sensing line 110 is cut, the sensing line 110 extending in the vertical direction inside the main body 120 moves in the downward direction due to the weight of the weight 130 and is fixed to the sensing line 110. The sensing unit 192 also moves together in the direction in which the sensing line 110 moves.

The switch body 191 is configured to generate an electrical signal to be delivered to the alarm device 150 according to the movement direction of the switch detection unit 192 in the above.

 In addition, the multi-contact limit switch 190 provided to detect the vertical movement of the sensing line 110 is preferably used a coil spring type limit switch.

The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is by way of example only and not by way of limitation. In addition, it is obvious that any person skilled in the art may make various modifications and imitations without departing from the scope of the technical idea of the present invention.

As described above, the present invention includes a first detection device for detecting the movement of the detection line and a second detection device for detecting whether the detection line is cut, thereby alarming both when the external intruder moves or cuts the detection line. Has a security effect that prevents access to the outdoor facilities in any way.

Claims (7)

Inside the roller 121 is rotatably fixed, the main body 120 is a cover is formed on one side, and the direction of movement in the roller 121 of the main body 120 is vertically bent, part of which extends downward, Some of the sensing line 110 is installed horizontally on the fence, the weight 130 is fixed to the end extending to the lower portion of the sensing line 110, pulling the sensing line 110 with a constant force, and the main body ( The first detection device 140 installed to detect the movement of the detection line 110 in the interior of the 120, and the alarm device 150 for identifying the signal detected by the first detection device 140 from the outside. In the outdoor facilities anti-theft device comprising a), It is installed on the outside of the main body 120 to prevent theft of the outdoor facility, characterized in that it further comprises a second sensing device 170 for detecting this when the cutting line 110 and operating the alarm device 150. Device. The method of claim 1, The second detection device 170, the detection line 110 and the main body 120 that drops in an arc around the detection line fixing device 111 when cutting the detection line 110 installed horizontally in the outdoor facility In abutting position, The second lead switch unit 171 is fixed to the outside of the main body 120, and the second magnetic part 172 is fixed to the sensing line 110 horizontally installed from the sensing line fixing device 111. The distance between the second lead switch unit 171 and the distance between the sensing line fixing device 111 and the second magnetic portion 172 is the same, characterized in that the installation of the outdoor facility theft prevention device. The method of claim 2, The second magnetic portion 172 is fixed to the outside of the main body 120, the second lead switch unit 171 is fixed to the sensing line 110 is installed horizontally characterized in that the outdoor facility anti-theft device. The method of claim 1, The second detection device 170, the detection line 110 and the main body 120 that drops in an arc around the detection line fixing device 111 when cutting the detection line 110 installed horizontally in the outdoor facility In abutting position, The limit switch 181 is installed on the main body 120 side, and the second weight 183 is fixed to the sensing line 110 horizontally installed, and the limit switch 181 from the sensing line fixing device 111. Anti-theft device for an outdoor facility, characterized in that the distance and the distance between the second weight weight (183) from the detection line fixing device 111 is equally installed. The method of claim 1, The first sensing device 140 and the second sensing device 170 are installed at predetermined intervals in the upper and lower directions of the sensing line 110 extending in the vertical direction in the main body 120, respectively. The first sensing device and the second sensing device is composed of a reed switch, In the above, the magnet portion is located between the first sensing device and the second sensing device, The magnet part is fixed to the sensing line is configured to move the magnet part in accordance with the movement of the sensing line to generate an electrical signal when the first sensing device and the second sensing device and the magnetic part is bonded to the alarm device 150 is operated Anti-theft device for outdoor facilities. The method of claim 5, The first detection device and the second detection device is composed of a magnet portion, The reed switch is fixed to the detection line is an outdoor facility anti-theft device, characterized in that the reed switch moves with the movement of the detection line. The method of claim 1, The first detection device and the second detection device, a multi-contact limit switch 190 that can detect the movement of the upper and lower direction of the sensing line is used, The switch detection unit 192 of the multi-contact limit switch 190 is fixed to the detection line 110 to move together in the direction in which the detection line 110 moves, and according to the direction of movement of the switch detection unit 192. Anti-theft device for an outdoor facility, characterized in that the alarm unit 150 is configured to operate by generating an electrical signal inside the switch body (191).

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