JP6138510B2 - Dustproof device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a dustproof device that prevents dust from being scattered during civil engineering work and building work so as not to adversely affect the surrounding living environment and natural environment.

For example, when performing embankment construction, a dust-proof net is stretched along the construction site so that dust containing dust does not scatter in private houses or fields (see Patent Document 1).
A dustproof net made of synthetic resin such as polyethylene having a mesh size of 1 to 2 mm is stretched to a height of 1 to 3 m.

JP 2008-121158 A

However, the conventional dustproof net has a problem that the dust collecting effect is low.
In addition, in the conventional dustproof net, there is also a problem that dust once collected by the net is rolled up by the wind and scatters around the net. To solve this problem, the height of the dustproof net is reduced. Must be bigger.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a dustproof device that has an excellent dust collecting effect without increasing the dustproof net.

In order to achieve the above object, a dustproof device according to the present invention includes a dustproof net stretched along a construction area where dust is generated, and a first sprayer disposed on the front side of one surface of the dustproof net to spray water on the dustproof net. A watering means including a watering nozzle, a second watering nozzle that is disposed in front of the other surface of the dustproof net and sprays the dustproof net, an anemometer that measures the wind direction, and the dustproof net. Control means for determining whether or not the watering condition for performing watering is established, and if the watering condition is satisfied, the control means for causing the dustproof net to spray water by the watering means for a predetermined watering time. the provided, watering by the control means, based on the measured wind direction by the wind vane, said first, said dust-proof net from sprinkler nozzle towards located on the windward side of the dust protective net of the second water spray nozzles Characterized in that it is made by causing water spray towards.
In addition, the dustproof device of the present invention includes a dustproof net stretched along a construction area where dust is generated , a water spray nozzle that sprinkles water on the dustproof net, and a moving mechanism that moves the water spray nozzle. Sprinkling means, an anemometer for measuring the wind direction, and determining whether or not the watering conditions for performing watering to the dustproof net are satisfied, and if the watering conditions are satisfied, a predetermined watering time is determined. And a control means for causing the dust-proof net to sprinkle with the water sprinkling means, and the water sprinkling by the control means is performed by controlling the moving mechanism based on the wind direction measured by the anemometer. It is made by being made to be located on the windward side of the dustproof net and sprinkling water from the watering nozzle toward the dustproof net.

  In the present invention, the dust collecting effect is remarkably enhanced by making the dustproof net wet without increasing the dustproof net.

It is explanatory drawing which shows the state in which dustproof apparatus 10A, 10B of 1st, 2nd embodiment was installed in the site of embankment construction. It is a perspective view which shows the structure of dustproof apparatus 10A, 10B of 1st, 2nd embodiment. It is a block diagram showing the composition of dustproof device 10A of a 1st embodiment. It is a block diagram which shows the structure of the dustproof apparatus 10B of 2nd Embodiment. It is a perspective view which shows the structure of the dustproof apparatus 10C of 3rd Embodiment. It is a block diagram which shows the structure of the dustproof apparatus 10C of 3rd Embodiment. It is a perspective view which shows the structure of the dustproof apparatus 10D of 4th Embodiment. It is a block diagram which shows the structure of the dustproof apparatus 10D of 4th Embodiment.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described for a case where embankment work is performed.
As shown in FIGS. 1 to 3, the dustproof device 10 </ b> A includes a dustproof net 12, water sprinkling means 14, and control means 18 </ b> A.

As shown in FIG. 1 and FIG. 2, the dustproof net 12 is stretched along the bank 2 where the embankment work is performed, and a symbol F in the drawing is a frame made of a pipe material for stretching the dustproof net 12. Is shown.
The degree of the dustproof net 12 is, for example, 1 to 2 mm, and the material thereof is not limited.

The water spraying means 14 sprays water onto the dustproof net 12, wets the dustproof net 12, and attaches moisture to the dustproof net 12.
As shown in FIGS. 2 and 3, the water sprinkling means 14 includes a water source 1402, a pump 1404, a water supply pipe 1406, and a watering nozzle 1408.
As the water source 1402, a tank for storing rain water or tap water is used.
The pump 1404 pumps up water in the tank and pumps it to the water supply pipe 1406.
The water supply pipe 1406 is extended along the extending direction of the dust-proof net 12.
A plurality of watering nozzles 1408 are connected to a portion of the water supply pipe 1406 spaced apart in the longitudinal direction, and the plurality of watering nozzles 1408 spray water over the entire area of the dust-proof net 12. As the watering nozzle 1408, either a fixed type or a type having a turning function can be applied.
Instead of the watering nozzle 1408, a plurality of holes may be provided in the water supply pipe 1406, and water may be sprayed from these holes.

The control means 18A includes a CPU, a ROM for storing and storing a control program, a RAM as an operation area of the control program, an EEPROM for holding various data in a rewritable manner, an interface unit for interfacing with peripheral circuits, and the like. A computer or a PLC (programmable logic controller) is used.
The control means 18A executes the control program to determine whether or not a watering condition for performing watering to the dustproof net is satisfied. If the watering condition is satisfied, a predetermined watering is determined. The operation of the pump 1404 is turned on for a time, and water is sprayed by the water spray means 14 to the dustproof net.
In the present embodiment, the watering execution condition is satisfied each time a predetermined set time elapses in a predetermined time zone.
The control means 18A includes a first timer 1801 and a second timer 1802.
The control means 18A is connected to an operation switch 20 for turning on / off the operation of the dustproof device 10A and a setting means 22A for setting the first timer 1801 and the second timer 1802.

When the first timer 1801 is activated by setting the time zone and the set time in the watering execution condition using the setting unit 22A, the first timer 1801 is set every time the set time elapses in the time zone. It generates information to the effect that has passed. In addition, in this specification, a time slot | zone shall prescribe | regulate both the day of the week, and the time which performs watering from 0:00 to 24:00 of the day.
For example, if the day of the week on which construction is performed is Monday to Friday, the construction time zone is from 8:00 to 17:00, and the set time is 10 minutes, the day of the week, the time zone, and the set time One timer 1801 is preset using setting means 22A.
The second timer 1802 sets the watering time in advance using the setting means 22A, so that the watering time is measured every time the first timer 1801 generates information indicating that the set time has elapsed. If the lapse of time, the information that the watering time has elapsed is generated.
For example, if the watering time is 10 seconds, the watering time is preset in the second timer 1802.

  Note that the first timer 1801 and the second timer 1802 may have any functions such as a function for outputting day information, date information, time information, a time measurement function for measuring time, and the CPU executes a program. Therefore, it may be realized by software, or may be realized by hardware by a dedicated LSI included in the microcomputer, and various conventionally known configurations can be used.

The setting means 22A is a numeric keypad for inputting numerical values for setting the above-described time zone, setting time, watering time, an indicator for displaying the input numerical values, a decision key for determining the input numerical values, and an input. It is configured to include a clear key that clears the numeric value.
Accordingly, in the present embodiment, the setting means 22A functions as a condition setting means for setting the time zone and the setting time to be changeable, and also functions as a watering time setting means for setting the watering time to be changeable.

When the operation switch 20 is turned on, the control means 18A activates the first timer 1801, and every time it receives information indicating that the set time has elapsed from the first timer 1801, the control means 18A sprays the dust net 12. It is determined that the watering execution condition is satisfied, the operation of the pump 1404 is turned on, and watering by the watering means 14 is started.
Further, when the control means 18A receives information indicating that the watering time has elapsed from the second timer 1802 after the watering time has elapsed, the operation of the pump 1404 is turned off and the watering by the watering means 14 is terminated.
Therefore, if the day of the week and the time zone are set as described above, and the set time is set to 10 minutes and the watering time is set to 10 seconds, the time of the day of the week on which the construction is performed is set every 10 minutes. A 10 second watering is performed. Thereby, moisture adheres to the dust-proof net 12 by watering, and the state is maintained.
Further, the control means 18A stops all operations of the dustproof device 10A when the operation switch 20 is turned off.

  In addition, the watering time per time may be a time that is sufficient to allow water to adhere to the entire area of the dust-proof net 12 and to wash off dust adhering to the dust-proof net 12.

The present inventors performed a dustproof effect test for the case without the dustproof net 12, the case with the dustproof net 12, and the case with the dustproof net 12 with moisture attached thereto.
(Test equipment)
Three ducts with an inner diameter of 300 mm were prepared, and powders (JIS test powder 1, type 7 Kanto Loam) were prepared as dust.
A blower was placed at the inlet which is one end of the duct.
A dustproof net 12 (Gyoyo Material Co., Ltd. 1 mm scale) was stretched at the outlet which is the other end of the two ducts.
A dust meter (Shibata Science Laser Dust Meter LD-1H type) was placed in the vicinity of the duct outlet away from the duct outlet.

(Test procedure)
(1) When the dustproof net 12 is not provided, (2) When the dustproof net 12 is stretched, (3) When the dustproof net 12 is stretched and water is applied with a sponge, (4) In the order without the dustproof net 12, the duct The dust was continuously supplied in a uniform amount from the inlet, and the air velocity at the outlet of the duct was set to 1.3 m / sec, and the dust concentration was measured with a dust meter.
Since the amount of dust supplied by the duct varies slightly, the dust concentration measurement for one minute is repeated 10 times, and the maximum and minimum values are taken as the measured values, and the dust concentration is compared and the dust collection rate Was calculated.

(Test results)
When the dustproof net 12 was stretched at the outlet, the dust concentration was stable and could be reduced (collected) by 55 to 72% compared to when the dustproof net 12 was not stretched.
When water was applied to the dust-proof net 12, the dust concentration was further stabilized, and was reduced (collected) by 80 to 88% compared to the case where the dust-proof net 12 was not stretched. Further, the collection rate was improved 1.22 to 1.45 times compared to the case of the dustproof net 12 without applying water.

Therefore, according to the first embodiment, at the time of embankment construction, when the operation switch 20 is turned on, the control means 18A sprinkles water on the dustproof net 12 at a set time and attaches moisture to the dustproof net 12. It becomes possible to enhance the dustproof effect.
And by this watering, the dust which absorbed the water | moisture content on the dustproof net 12 is washed off, it flows down below the dustproof net 12, and dust adheres to the ground with the water sprayed, and can prevent scattering of dustproof.
At the same time, the dust-proof net 12 is washed by watering, and the dust-proof net 12 is returned to a state where an excellent dust-proof effect is exhibited.
Accordingly, it is possible to maintain the dustproof net 12 in a state in which the dustproof effect is enhanced during the banking work, and the dustproof device 10A having an excellent dust collecting effect can be obtained without increasing the dustproof net 12. .

The watering time may be a time that is sufficient to allow sufficient moisture to adhere to the entire area of the dust-proof net 12 and to wash off dust adhering to the dust-proof net 12. Therefore, the setting means 22A may be omitted by setting the watering time to a predetermined time in advance according to the height of the dustproof net 12, the number of watering nozzles 1408, and the like.
However, if the setting means 22A for setting the watering time is provided as in the present embodiment, the time for cleaning the dustproof net 12 by watering can be adjusted according to the degree of dirt, and the dustproof net 12 is attached to the dust. It is more advantageous in returning to the initial state where it has not been done and enhancing the dustproof effect.

(Second Embodiment)
Next, a second embodiment will be described. In the following embodiments, the same parts and members as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The parts and members different from those of the first embodiment are mainly described. To do.
As shown in FIGS. 1, 2, and 4, the dust-proof device 10 </ b> B of the second embodiment includes a dust-proof net 12, a water sprinkling means 14, a moisture detection means 16, and a control means 18 </ b> B. When the adhering moisture decreases, the dust-proof net 12 is sprinkled.

The moisture detection means 16 detects moisture on the dust-proof net 12, and is a contact-type moisture sensor that detects moisture by a change in electrical conductivity, or non-contact that detects moisture by reflection or transmission of detection light. Various types of commercial products, such as a moisture sensor of the type, can be used.
The moisture detection means 16 is provided at one representative location of the dust-proof net 12 or at a plurality of locations with an interval between the dust-proof nets 12.

Similarly to the first embodiment, the control means 18B determines whether or not the watering conditions for performing watering to the dustproof net are satisfied, and if the watering conditions are satisfied, the predetermined watering is determined. The operation of the pump 1404 is turned on for a time, and water is sprayed by the water spray means 14 to the dustproof net.
In the second embodiment, the watering condition is that the moisture value detected by the moisture detection means 16 in a predetermined time zone is not more than a predetermined value.

The control means 18B includes a third timer 1803 and a fourth timer 1804.
Also connected to the control means 18 are an operation switch 20 for operating on / off of the operation of the dustproof device 10B and a setting means 22B for setting a third timer 1803 and a fourth timer 1804.

When the third timer 1803 is activated by setting the time zone in the watering execution condition using the setting unit 22B, the watering time zone information indicating whether or not the current time is the time zone. Is generated. Similar to the first embodiment, the time zone defines both the day of the week and the time of watering from 0:00 to 24:00.
The fourth timer 1804 sets the watering time in advance using the setting means 22B, so that the watering time is counted every time it is activated, and if the watering time has passed, information indicating that the watering time has passed is displayed. Is to be generated.
Further, the third timer 1803 and the fourth timer 1804 can be realized by software or hardware similarly to the first timer 1801 and the second timer 1802 of the first embodiment, and are conventionally known. Various configurations of can be used.

Similar to the setting means 22A of the first embodiment, the setting means 22B is a numeric keypad (number keys) for inputting numerical values for setting the above-mentioned time zone and watering time, and a display for displaying the input numerical values. , A determination key for determining the input numerical value, a clear key for clearing the input numerical value, and the like.
Therefore, in the second embodiment, the setting unit 22B functions as a condition setting unit that sets the time zone to be changeable, and also functions as a watering time setting unit that sets the watering time to be changeable.

When the operation switch 20 is turned on, the control unit 18B activates the third timer 1803, receives watering time zone information indicating that the current time is the time zone from the third timer 1803, and moisture It is determined whether or not the watering condition that the moisture value detected by the detection means 16 is not more than a predetermined value is satisfied.
When it is determined that the watering condition is satisfied, the control unit 18B turns on the operation of the pump 1404 and starts watering by the watering unit 14.
Further, the control means 18B activates the fourth timer 1804 at the same time as determining that the watering condition is satisfied. When the control means 18B receives information from the fourth timer 1804 that the watering time has elapsed, the control means 18B turns off the operation of the pump 1404 and ends the watering by the watering means 14.
Therefore, as in the case of the first embodiment, if the day of the week and the time zone are set and the watering time is set to 10 seconds, the moisture detection means in the time zone where the construction is performed on the day of the week on which the construction is performed. Every time it is detected that the moisture value detected at 16 is less than or equal to a predetermined value, watering for 10 seconds is performed. Thereby, moisture adheres to the dust-proof net 12 by watering, and the state is maintained.
Further, when the operation switch 20 is turned off, the control unit 18B stops all the operations of the dustproof device 10B.

According to the second embodiment, at the time of embankment construction, the control means 18B causes the pump 1404 to be driven for a certain period of time when the moisture value detected by the moisture detection means 16 is less than or equal to a predetermined value. Watered. That is, when water on the dust-proof net 12 evaporates due to drying of water droplets on the dust-proof net 12, or when dust adheres and the dust absorbs moisture, water is sprayed from the watering nozzle 1408.
And by this watering, the dust which absorbed the water | moisture content on the dustproof net 12 is washed off, it flows down below the dustproof net 12, and dust adheres to the ground with the water sprayed, and can prevent scattering of dustproof.
At the same time, the dust-proof net 12 is washed by watering, and the dust-proof net 12 is returned to a state where an excellent dust-proof effect is exhibited.
Therefore, it is possible to maintain the dustproof net 12 in a state in which the dustproof effect is enhanced during the embankment work, and the dustproof device 10B having an excellent dust collecting effect without increasing the dustproof net 12 is obtained. .

  Although the setting means 22B may be omitted, if the setting means 22B for setting the watering time is provided, the time for cleaning the dustproof net 12 by watering can be adjusted depending on the degree of dirt, and the dustproof net 12 can be adjusted to dust. It is the same as in the first embodiment that it is more advantageous in returning to the initial state where no dust is attached and enhancing the dustproof effect.

Moreover, you may combine 1st Embodiment and 2nd Embodiment.
In this case, the watering condition is detected by the water detection means in the first watering condition that is satisfied each time a predetermined set time elapses in a predetermined time period, and in the predetermined time period. And a second watering condition that is established when the moisture value is equal to or lower than a predetermined value.
If one of the first watering execution condition and the second watering execution condition is established, the control means causes the dustproof net 12 to perform watering by the watering means 14 for a predetermined watering time.
In this way, at the time of embankment construction, when the operation switch 20 is turned on, the control means sprays water on the dust-proof net 12 and attaches moisture to the dust-proof net 12 every time the set time elapses. It becomes possible to raise.
Further, even when the moisture value detected by the moisture detection means 16 becomes equal to or less than a predetermined value, the pump 1404 is driven for a certain period of time, and water is sprayed from the watering nozzle 1408.
Therefore, it is more advantageous to maintain the dustproof effect with the dustproof net 12 and more advantageous to obtain a dustproof device having an excellent dust collecting effect without increasing the dustproof net 12.

(Third embodiment)
Next, a third embodiment will be described.
The dustproof device 10C of the third embodiment is a modification of the second embodiment, and when there is wind, the dustproof net 12 is sprinkled with water from a water spray nozzle 1408 disposed on the windward side of the dustproof net 12. It is what I did.
As shown in FIGS. 5 and 6, the dustproof device 10C of the third embodiment includes an anemometer 24 in addition to the dustproof net 12, the water sprinkling means 14, the moisture detecting means 16, and the control means 18C. The water sprinkling means 14 includes water sprinkling nozzles 1408 respectively disposed in front of both surfaces of the dustproof net 12.

If it demonstrates in detail, the water sprinkling means 14 will be the 1st watering arrange | positioned in one side of the both surfaces of the dustproof net 12 in the several places arrange | positioned at intervals in the extending | stretching direction of the dustproof net 12. FIG. A nozzle 1408A and a second watering nozzle 1408B arranged on the other side of the both surfaces of the dustproof net 12 are provided.
Further, the water sprinkling means 14 includes electromagnetic valves 1410 respectively provided at locations spaced in the longitudinal direction of the water supply pipe 1406, and at a plurality of locations arranged at intervals in the extending direction of the dustproof net 12, The first watering nozzle 1408A and the second watering nozzle 1408B are connected to the electromagnetic valve 1410.
Then, the control means 18C operates the electromagnetic valve 1410 from the wind direction measured by the anemometer 24, from the first water nozzle 1408A or the second water nozzle 1408B located on the windward side of the dust net 12 toward the dust net 12. Sprinkle water.
According to the third embodiment, when there is wind, water can be efficiently attached to the dust-proof net 12 by watering, and the dust-proof net 12 to which dust is attached can be efficiently cleaned. Therefore, it is further advantageous in enhancing the dustproof effect.
Moreover, if one of the first watering condition and the second watering condition is established by combining the third embodiment and the first embodiment, a predetermined watering time is set in the dustproof net 12. Watering by the watering means 14 may be performed.

(Fourth embodiment)
Next, a fourth embodiment will be described.
The dustproof device 10D of the fourth embodiment is also a modification of the second embodiment, and, like the dustproof device 10C of the third embodiment, when there is wind, the windward side of the dustproof net 12 Water is sprayed from the water spray nozzle 1408 arranged on the dustproof net 12.
In the fourth embodiment, the watering nozzle 1408 is not arranged in front of both surfaces of the dustproof net 12 as in the third embodiment, and the watering nozzle 1408 is moved to the windward side of the dustproof net 12 by the moving mechanism. It is what I did.
As shown in FIGS. 7 and 8, a dustproof device 10C according to the fourth embodiment includes a dustproof net 12, a sprinkling means 14, a moisture detecting means 16, a control means 18D, and an anemometer 24. The means 14 includes a moving mechanism 26 that moves the watering nozzle 1408 to the windward side of the dust-proof net 12.

More specifically, as shown in FIGS. 7 and 8, the moving mechanism 26 includes a plurality of swivel bases 2602 arranged at locations corresponding to locations spaced in the longitudinal direction of the water supply pipe 1406, and each swivel. An actuator 2604 for turning the table 2602 is included.
The swivel base 2602 is turnably disposed on a base 2606 installed on the ground, and is swiveled 180 degrees by an actuator 2604 such as an electric motor housed inside the base.
A watering nozzle 1408 connected to the water supply pipe 1406 is mounted on each swivel base 2602.
Then, the control means 18D controls the actuator 2604 from the wind direction measured by the anemometer 24 to turn the swivel base 2602 so that the watering nozzle 1408 is positioned on the windward side of the dustproof net 12 and from the watering nozzle 1408 to the dustproof net 12. Spray water.
According to the fourth embodiment, as in the third embodiment, when there is wind, water can be efficiently attached to the dust-proof net 12 by watering, and dust has adhered. Since the dustproof net 12 can be cleaned efficiently, it is even more advantageous in enhancing the dustproof effect.
In addition, if the fourth embodiment and the first embodiment are combined and one of the first watering execution condition and the second watering execution condition is established, a predetermined watering time and the dustproof net 12 are set. Water spraying by the water spraying means 14 may be performed.

In the above-described embodiment, when water mixed with a surfactant is sprayed, moisture is easily adapted to the dust-proof net and is difficult to dry. Therefore, the dust collecting effect by moisture is increased, and the dust-proofing effect is enhanced. Even more advantageous.
As the surfactant, it is sufficient to mix about 1 to 10 milliliters per liter regardless of the type such as cationic ones or anionic ones. In particular, anionic soaps are easy to use on construction sites because they have a high biodegradation rate, low environmental impact, and low cost.

  10A, 10B, 10C, 10D ... Dustproof device, 12 ... Dustproof net, 14 ... Sprinkling means, 1408 ... Sprinkling nozzle, 16 ... Moisture detection means, 18A, 18B, 18C, 18D ... Control means, 22 ...... Setting means.

Claims (9)

A dust net stretched along the construction area where dust is generated,
A first watering nozzle that is disposed in front of one surface of the dustproof net and sprinkles the dustproof net; and a second watering nozzle that is disposed in front of the other surface of the dustproof net and sprays the dustproof net. Watering means comprising, and
An anemometer to measure the wind direction;
It is determined whether or not a watering condition for performing watering to the dustproof net is satisfied, and if the watering condition is satisfied, watering by the watering means is performed on the dustproof net for a predetermined watering time. Control means
Based on the wind direction measured by the anemometer, the water sprayed by the control means is directed from the one of the first and second water spray nozzles located on the windward side of the dustproof net toward the dustproof net. Made by sprinkling water,
A dustproof device characterized by that. A dust net stretched along the construction area where dust is generated,
A watering means comprising watering nozzles for watering the dustproof net, and a moving mechanism for moving the watering nozzles ;
An anemometer to measure the wind direction;
It is determined whether or not a watering condition for performing watering to the dustproof net is satisfied, and if the watering condition is satisfied, watering by the watering means is performed on the dustproof net for a predetermined watering time. and control means for,
Sprinkling by the control means is performed by controlling the moving mechanism based on the wind direction measured by the anemometer so that the watering nozzle is positioned on the windward side of the dustproof net and is directed from the watering nozzle toward the dustproof net. Made by sprinkling water,
A dustproof device characterized by that. It further comprises watering time setting means for setting the watering time to be changeable.
The dustproof device according to claim 1 or 2 , characterized by the above. The watering execution condition is satisfied each time a predetermined set time elapses in a predetermined time zone,
The dustproof device according to any one of claims 1 to 3, wherein the dustproof device is provided. Further comprising condition setting means for setting the time zone and the set time to be changeable,
The dustproof device according to claim 4 . Further comprising moisture detecting means for detecting moisture on the dustproof net,
The watering execution condition is satisfied when the value of moisture detected by the moisture detection means in a predetermined time zone becomes a predetermined value or less,
The dustproof device according to any one of claims 1 to 3, wherein the dustproof device is provided. Further comprising condition setting means for setting the time zone to be changeable,
The dustproof device according to claim 6 . Further comprising moisture detecting means for detecting moisture on the dustproof net,
The watering execution condition includes a first watering execution condition that is satisfied each time a predetermined set time elapses in a predetermined time zone, and a moisture value detected by the moisture detection means in the time zone. Including a second watering condition that is established by being less than or equal to a predetermined value,
If either one of the first watering execution condition and the second watering execution condition is established, the control means causes the dustproof net to perform watering by the watering means for a predetermined watering time.
The dustproof device according to any one of claims 1 to 3, wherein the dustproof device is provided. Water mixed with a surfactant is used for the watering.
The dustproof device according to any one of claims 1 to 8, wherein

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