Filter media and filter media opening prevention assist system used in roll-type filter systems

Abstract

The present invention provides a filter material for a roll-type filter and a system to prevent the opening of the filter material in a roll-type filter, even if tensile tension is applied to the filter material during the winding operation of the filter material, and furthermore, prevents premature damage to the filter material. [Solution] A filter material used in a roll-type filter system that moves a roll of filter material onto a filter surface and winds up the filter material that has moved onto the filter surface to update the filter surface movement, wherein the filter material is made of synthetic fibers and is formed by weaving together warp threads that extend along the direction of movement of the filter surface and weft threads that extend intersecting the warp threads to form an opening, wherein the filter material is characterized in that multiple rows of warp threads are woven in parallel and continuously to form an anti-tensile tension band that resists the tensile tension generated in the filter material due to the update of the filter surface movement.

Description

Technical Field

[0001] The present invention relates to a filter medium used in a fully automatic dust-proof roll-type filter system for volcanic ash and dust and a filter medium unrolling prevention system, and particularly relates to a filter medium with unrolling prevention developed for roll-type filters and a filter medium unrolling prevention auxiliary system capable of further assisting unrolling prevention of the filter medium to achieve toughening of the filter medium. Background Art

[0002] In recent years, desertification has progressed on a global scale, and automatic dust-proof filter systems that protect against dust disasters, volcanic eruptions and the like for security facilities, electric power, national agency facilities such as data centers, airports, ports, public infrastructure facilities including police and fire departments, factories, building air conditioning for enterprises, general building air conditioning and the like against dust are recognized as an essential disaster prevention system. In particular, an automated, labor-free automatic volcanic ash protection system is regarded as important.

[0003] The inventors of the present application have already invented a fully automatic filter medium winding type automatic dust-proof filter system capable of protecting against dust disasters, volcanic eruptions and the like.

[0004] This time, the inventors of the present application invented a filter medium with unrolling prevention used in the above-mentioned fully automatic filter medium winding type automatic dust-proof filter system, in other words, a roll-type filter system, and a filter medium unrolling prevention auxiliary system for assisting unrolling prevention of the filter medium.

[0005] It is expected that the present invention can quickly respond to uncertain dust disaster risks. That is, specifications can be customized by rank according to the importance of application to each infrastructure facility, and filter media can also be serialized according to the purpose of each facility, equipment and apparatus.

[0006] For example, in a dust collection filter system for volcanic ash, specifically a fully automatic dust-proof roll-type filter system for volcanic ash and sand, we can provide a filter material with an opening prevention mechanism and an auxiliary system for preventing the opening of the filter material, which can be configured to accommodate and be selected according to the region where volcanic ash falls.

[0007] Furthermore, considering volcanic ash dust collection systems in particular, it is possible to automate and operate such systems as a BCP (Business Continuity Plan) activity continuity system for a certain period of time, from volcanic eruption disasters to the security of national institutions, various important facilities, companies, factory buildings, and ordinary households, as a countermeasure to prevent equipment shutdown due to dust from volcanic eruption dust in the event of an emergency. It is also possible to simplify the man-hours and effort required for maintenance by workers, and it is thought that the man-hours required for subsequent maintenance to maintain functionality can also be reduced.

[0008] However, various issues have been pointed out regarding automatic roll-type filter systems for collecting volcanic ash and other dust particles.

[0009] In other words, the automatic winding roll-type filter system for volcanic ash and other dust has a structure in which tensile tension is applied to the filter material when the filter material is wound up, or in other words, when the filter material is replaced. This tensile tension causes the opening of the filter material to open, which is a problem. Furthermore, the opening of the filter material leads to accelerated damage to the filter material.

[0010] Therefore, in recent years, there has been a demand for the development of filter media and a system to assist in preventing the opening of the filter media, which are designed to prevent the opening of the filter media during use and thus prevent premature damage to the filter media, in automatic winding type filter systems for volcanic ash and other dust. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Japanese Patent Publication No. 2019-209009 [Overview of the Initiative] [Problems that the invention aims to solve]

[0012] This invention was conceived in view of the aforementioned conventional demands, namely, the need for a filter material that can be strengthened for use in an automatic winding type filter system for volcanic ash and other dust, and that does not open up during use, nor does it accelerate the damage to the filter material. The purpose of this invention is to provide a filter material for a roll-type filter and a system to prevent the opening of the roll-type filter, even if tensile tension is applied to the filter material during the winding operation of the roll-type filter material, so that the opening of the filter material does not open, nor does it accelerate the damage to the filter material.

[0013] Incidentally, in Japan, in order to protect critical infrastructure from the adverse effects of ashfall from volcanic eruptions, which are a natural phenomenon, there has been a growing demand for the development of a dust removal system, specifically a fully automatic dust removal system. This system would protect major facilities and equipment from atmospheric volcanic ash or fine dust, ensure business continuity in times of emergency (BCP), and also protect defense facilities of national security agencies. It would block volcanic ash and atmospheric dust, allowing essential equipment such as cooling systems for critical machinery and facilities to always function normally.

[0014] The facilities targeted by these requests are diverse, ranging from nuclear power plants, electricity facilities, telecommunications facilities, and data centers to air conditioning and cooling facilities and precision machinery facilities for national security institutions, as well as airports, railways, important facilities of local governments, hospitals, fire and police agencies, and many others.

[0015] Furthermore, in countries and regions abroad, particularly those with many deserts, sand and dust are already causing adverse effects on the aforementioned equipment. Therefore, the need for the fully automatic dust removal system is considered to be high internationally, and it is judged to be a necessary invention, especially in today's world where desertification is progressing rapidly.

[0016] Furthermore, the construction of this invention can also address the need to rank the level of protection at each stage, from important national facilities, companies, and factories to buildings and ordinary households, from a national security perspective, and to construct a system that can respond to the needs of each stage according to its rank. [Means for solving the problem]

[0017] The present invention A filter material used in a roll-type filter system that allows for the movement and renewal of the filter surface by moving the rolled filter material onto the filter surface and then winding up the filter material that has moved onto the filter surface, The filter material is made of synthetic fibers and is formed by weaving together warp threads (vertical threads) that extend along the direction of movement of the filter surface and weft threads (horizontal threads) that extend intersecting with the warp threads (vertical threads), thereby creating an opening. The aforementioned filter material is woven with multiple parallel rows of warp threads to create an anti-tensile tension band that resists the tensile tension caused by the movement and renewal of the filter surface in the filter material. It is characterized by the following: or The aforementioned anti-tensile tension bands are provided in multiple bands in the filter surface width direction intersecting the movement update direction of the filter surface. It is characterized by the following: or The anti-tensile tension band is provided in the filter surface width direction intersecting the movement update direction of the filter surface, and is located on both sides and approximately in the center of the width direction. It is characterized by the following: or The synthetic fiber is woven and formed from polyester monofilament yarn, characterized in that, or, A filter medium opening prevention auxiliary system for use in a roll-type filter system, wherein a filter medium wound into a roll is moved to a filter surface, the filter medium moved to the filter surface can be wound up, and the filter medium runs straight in a vertical direction, The filter medium renewal auxiliary device is disposed on a back surface side of the filter medium that is moved and renewed to the filter surface, and is formed of a guide roller that assists and promotes the movement and renewal of the filter medium, characterized by the above.

Effects of the Invention

[0018] According to the filter medium and the renewal auxiliary device of the present invention, for an automatic winding type filter system for dust such as volcanic ash, the strength of the filter medium used in the filter system can be achieved, and furthermore, opening of the filter medium caused by use, and thus accelerated damage to the filter medium can be prevented. That is, even if tensile tension is applied to the filter medium during the winding operation of the filter medium for a roll-type filter (when the filter is renewed), the opening of the filter medium does not widen, and accelerated damage to the filter medium does not occur, which provides an excellent effect that a filter medium and a renewal auxiliary device for a roll-type filter system can be provided.

Brief Description of Drawings

[0019] [Figure 1] Fig. (1) is a schematic configuration explanatory diagram illustrating the configuration of the present invention. [Figure 2] Fig. (2) is a schematic configuration explanatory diagram illustrating the configuration of the present invention. [Figure 3] Fig. (1) is a configuration explanatory diagram illustrating the configuration of the filter medium according to the present invention. [Figure 4] Fig. (2) is a configuration explanatory diagram illustrating the configuration of the filter medium according to the present invention. [Figure 5] Fig. (3) is a configuration explanatory diagram illustrating the configuration of the filter medium according to the present invention. [Figure 6] This is a schematic diagram illustrating the configuration of a conventional filter media. [Figure 7] This is a diagram illustrating the state in which an opening occurs in a conventional filter medium. [Figure 8] This is a configuration diagram illustrating the structure of the synchronization system. [Modes for carrying out the invention]

[0020] The present invention will be described below based on the embodiments shown in the figures. Figures 1 and 2 show schematic diagrams illustrating the configuration of a fully automatic dust removal system to which the present invention is applied, in other words, a roll-type filter system intended for efficient dust collection of volcanic ash and other fine particles.

[0021] As can be seen from Figures 1 and 2, fully automatic dust removal systems, i.e., roll-type filter systems, are typically configured as vertical systems.

[0022] As an example of a fully automatic dust removal system to which the present invention is applied, as shown in Figures 1 and 2, it comprises a filter material winding roller 1 provided in the upward direction with the filter material 4 pre-wound around it, a filter material winding roller 2 provided at a distance below the filter material winding roller 1, a filter material 4 attached between the rollers 1 and 2 and used as a roll-type filter, and a guide roller 24 provided on the back side of the attached filter material 4 to guide and assist the vertical movement of the filter material 4. Here, the guide roller 24 is installed so as to press the filter material 4 slightly forward from the back side, and multiple guide rollers are provided to eliminate contact resistance between the back side of the filter material 4 and the pivot rod 17, which is the front side frame material of the fully automatic dust removal system of the present invention.

[0023] Although three guide rollers 24 are shown in Figure 1, the installation is not limited to three; two or more guide rollers are also acceptable.

[0024] However, while the present invention is applicable to a fully automatic dust removal system in which the filter material 4 is moved straight from top to bottom as described above, it is by no means limited to this type of roll-type filter system.

[0025] In other words, this applies not only to fully automatic dust removal systems using roll-type filters that move the filter material 4 straight from top to bottom as described above, but also to fully automatic dust removal systems in which the filter material 4 is bent in a zigzag, wave-like pattern in the front-to-back direction between the filter material winding roller 1 and the filter material winding roller 2, which is provided at a distance below the filter material winding roller 1.

[0026] The aforementioned fully automatic dust removal system is a system that increases the area of ​​the filter material 4 used as a filter. By attaching the filter material 4 in a wave-like zigzag pattern in the front-to-back direction to the predetermined vertical distance between the filter material winding roller 1 and the filter material winding roller 2, that is, the distance that constitutes the filter surface in the vertical direction, the effective area as a filter is increased, thereby maximizing the filter function of the filter material 4.

[0027] Here, the system shown in Figure 1 is configured to accommodate both cases: when the filter media 4 is attached in a straight line so that it can be moved, and when the filter media 4 is attached in a wavy, zigzag pattern so that it can be moved. However, it is also possible to configure the system to accommodate both cases, such as when the filter media 4 is attached in a straight line and when it is attached in a wavy, zigzag pattern, or to configure them as separate systems.

[0028] The system configuration shown in Figure 1, in which the filter material 4 is attached in a wave-like zigzag pattern, is as follows: a filter material attachment roller set 6 consisting of a pair of filter material attachment rollers 3 provided between the rollers 1 and 2 and positioned vertically offset on both sides 5 in the horizontal diameter direction of both rollers 1 and 2; a filter material attachment roller set stage 7 formed by arranging multiple stages of the filter material attachment roller set 6 at intervals between the two rollers 1 and 2; filter material 4 attached in a zigzag pattern to form a substantially wave shape on the filter material attachment roller set stage 7; and a tension control means 8 that can control the attachment tension of the attached filter material 4.

[0029] The tension control means 8 controls the tension of the attached filter media 4. This means controls the spacing between the filter media attachment rollers 3, which are located at both ends 5 in the horizontal diameter direction of both rollers 1 and 2. Specifically, it uses a modification member 15 to slide the pivot rods 17 that support the multiple filter media attachment rollers 3 in the horizontal direction, thereby widening the spacing between the pair of pivot rods 17. This control ensures that a predetermined appropriate tension is maintained, thereby reliably increasing the effective area of ​​the filter surface of the filter media 4.

[0030] Next, referring to Figures 1 and 2, the configuration of a fully automatic dust removal system of the type in which the filter material 4 is attached in a wavy, zigzag pattern will be explained. As can be seen from Figures 1 and 2, the upper filter material winding roller 1 and the lower filter material winding roller 2 are mounted between the vertical frames 11 of a frame body framed in a rectangular shape by vertical frames 11 and horizontal frames 12, with the axial direction of both rollers 1 and 2 being horizontal. Then, a pair of filter material attachment rollers 3 are used to form a filter material attachment roller set 6, in which the filter material winding roller 1 and the filter material winding roller 2 are positioned slightly vertically on both sides 5 in the horizontal diameter direction.

[0031] In other words, when a filter media attachment roller 3 is provided on one end 5 in the horizontal diameter direction of the filter media winding roller 1 and the filter media winding roller 2, a filter media attachment roller 3 is provided on the other end 5 in the horizontal diameter direction of the filter media winding roller 1 and the filter media winding roller 2, slightly shifted downwards. Then, a filter media attachment roller set 6 is formed by this pair of filter media attachment rollers 3. Furthermore, multiple stages of this filter media attachment roller set 6 are provided at predetermined intervals between the two rollers 1 and 2 to form a filter media attachment roller set stage 7.

[0032] However, as shown in Figure 1, the filter media 4 is attached to the roller set stage 7 for attaching the filter media in a zigzag pattern so that it forms a roughly wave-like shape. Therefore, the surface on which the filter media 4 is attached in a zigzag pattern so that it forms a roughly wave-like shape constitutes the filter surface of the dust removal device that removes volcanic ash and dust.

[0033] Furthermore, as already mentioned above, this system is equipped with a modification member 15 that can change the surface area of ​​the filter material 4, which forms the filter surface; in other words, it can expand or contract the surface area. That is, when volcanic ash accumulates on the filter material 4 on the filter surface and the pressure drop of the filter material 4 increases, the pressure drop value is detected, and the modification member 15 is slid according to the detected value to expand the surface area of ​​the filter material 4 that forms the filter surface. However, as a control to expand the effective filter area of ​​the filter material 4, as mentioned above, for example, control can be performed to widen the distance between the filter material attachment rollers 3 provided at both ends 5 in the horizontal diameter direction of the two rollers 1 and 2, that is, to slide the pivot rods 17 that support the multiple filter material attachment rollers 3 horizontally by the modification member 15 and widen the distance between the pair of pivot rods 17. This control can be used to reliably expand the filter surface of the filter material 4.

[0034] Incidentally, in the roll-type filter system whose primary purpose is to collect dust such as volcanic ash, it is preferable to adopt a configuration that can particularly reduce the tensile tension applied to the filter material 4 during winding.

[0035] Therefore, in this invention, a filter material winding roller 1 positioned above and a filter material moving roller 2 positioned below at a distance from each other rotate synchronously at the same time, and the system is configured so that the filter material moving roller 2 can smoothly wind up the moving filter material 4. By adopting this configuration, a structure is achieved in which no tensile tension is applied to the filter material 4.

[0036] An embodiment will be described with reference to Figure 8. For example, a sprocket or the like, a synchronous member 29 is provided at the end of the filter media winding roller 1 and the end of the filter media moving roller 2, and a synchronous band 30 consisting of a chain or the like that spans over these upper and lower synchronous members 29 is attached.

[0037] The synchronization system is formed by the synchronization body 29 and the synchronization band 30. By providing this synchronization system, the filter material 4 can be moved from top to bottom without applying tensile tension.

[0038] Here, the synchronization system may be mounted in a double configuration on both the left and right ends of the filter media winding roller 1 and the filter media moving roller 2. This is because mounting it in a double configuration on both sides can prevent misalignment and axial misalignment.

[0039] As explained above, the adoption of the synchronization system significantly reduces the tensile tension during winding of the filter media 4. Therefore, this is a key point of the present invention. Furthermore, torsional action and shear stress on the filter media 4 caused by the filter media winding roller 1 and filter media moving roller 2 during winding of the filter media 4 can be eliminated, and it is expected that an increase in tensile tension in the filter media 4 can be reliably prevented.

[0040] Furthermore, a drive source is connected to the filter media moving roller 2 located below, and the filter media 4 is moved from top to bottom, i.e., the filter media 4 is wound up. However, this is not the only case, and it is also acceptable to connect drive sources to both the filter media winding roller 1 and the filter media moving roller 2.

[0041] However, in a type of filter system like the present invention, where the filter media 4 is wound up and moved, and the installation surface of the filter media 4 on the filter surface is moved and changed, there are concerns about damage to the filter media 4 and enlargement of the opening 28 of the filter media 4 due to the movement and replacement of the filter media 4 on the filter surface. The present invention addresses these problems.

[0042] In other words, the inventors of this invention have created a filter material 4 used in a roll-type filter system that eliminates premature damage to the filter material 4 due to filter movement and replacement, and prevents the opening 28 of the filter material 4 from expanding due to filter movement and replacement.

[0043] In conventional volcanic ash roll-type filter systems, the structure of the filter media 4, which acts as the filter during the rolling winding operation, was subjected to tensile tension during winding, which could cause the opening (opening 28) of the filter media 4 to open (see Figure 7). Therefore, in order to prevent this, the filter media 4 itself needs to have a certain degree of durability to withstand a certain amount of tensile force, that is, to resist tensile force.

[0044] During operation of the roll-type filter system, when the filter media 4 is wound up, the tensile load from the vertical direction may cause an opening (opening 28) to open in the plain-woven portion of the filter media 4, as shown in Figure 7, due to the tensile load from the vertical direction.

[0045] Moreover, as the filter media 4 placed on the filter surface becomes clogged, the aforementioned tensile load is further increased by the pressure applied to its surface, and especially when winding up the filter media 4 while the air conditioner or other equipment is in operation, the winding tension load increases even more.

[0046] The opening (aperture 28) of these filter media 4 is particularly noticeable in filter media 4 with openings of 80 microns or more. Therefore, some kind of countermeasure must be taken.

[0047] Conventionally, a plain weave filter media 4 (see Figure 6) has been used as a roll-type filter. However, with the mesh of this conventional plain weave filter media 4, the opening (opening 28) opens due to vertical tensile tension, and as a result, there was concern that larger volcanic ash particles would pass through the enlarged opening 28 of the filter media 4.

[0048] Therefore, in a so-called roll-type filter system like the system of the present invention, it is necessary to increase the strength of the filter material 4 against the aforementioned tensile tension in order to prevent the opening (opening 28) of the filter material 4 from opening during winding.

[0049] However, as a countermeasure to strengthen the strength of the filter media 4, it is conceivable to use reinforcing materials such as reinforcing sheets, seals, or adhesives on the filter media 4. However, when the filter media 4 is strengthened by using these materials, the surface film thickness and overall thickness of the filter media 4 increase, and the resulting irregularities on the thickened surface shorten the length of filter media 4 that can be wound onto the filter media winding roller 2, thereby shortening the operating time of the roll-type filter system itself. Furthermore, the overall durability of the system is also weakened. However, with the filter media 4 of the present invention, these problems are resolved.

[0050] In other words, according to the present invention, the length of filter material 4 that can be wound up by one filter material winding roller 1 is in the range of 100m to 300m, which is significantly longer than when the filter material 4 is reinforced by reinforcement as described above, and the strength of the filter material 4 itself can also be dramatically improved.

[0051] This has the advantage of being able to withstand and adapt to volcanic eruptions and ashfall for extended periods without replacing the filter media 4, and therefore the filter media 4 of the present invention can be said to be a volcanic ash filter with extremely important features.

[0052] As explained above, the inventors of this case have developed and invented a filter material 4 with enhanced tensile tension endurance that can adequately accommodate so-called roll-type filter systems.

[0053] However, the filter material 4 according to the present invention is constructed by weaving together warp threads (vertical threads) and weft threads (horizontal threads) of synthetic fibers, such as polyester monofilament yarn, in a plain weave or the like. That is, the filter material 4 constructed using the polyester monofilament yarn, etc., is constructed by weaving together warp threads (vertical threads) 25 that are arranged in the direction of movement and renewal of the filter surface (the direction of movement from top to bottom), in other words, that are arranged to extend in the vertical direction of the roll-type filter system, and weft threads (horizontal threads) 26 that intersect at approximately right angles, i.e., that are arranged to extend in the horizontal direction, so as to have an opening 28.

[0054] This weaving method is usually called plain weave, but the present invention is not limited to plain weave and may also be applied to filter material 4 made of twill weave or satin weave.

[0055] Here, the structure of the filter material 4, which is reinforced to withstand tensile tension according to the present invention, will be described. The filter material 4 according to the present invention is constructed by weaving multiple rows of warp threads 25, which are woven to extend in the longitudinal direction, in a substantially horizontal direction, i.e., the transverse direction (see Figure 3).

[0056] As already mentioned, as the filter material of the roll-type filter is replaced, tensile tension is applied to the filter material 4 in the direction of replacement, i.e., vertically. Therefore, in order to adequately counteract this tensile tension, the warp threads 25, which are woven in the vertical direction, are woven in multiple rows in a nearly horizontal direction, thereby forming an anti-tensile tension band 27.

[0057] An example of the tensile tension band 27 formed according to the present invention is illustrated in Figure 3. In Figure 3, the anti-tensile tension band 27 is formed by weaving four consecutive rows of warp threads 25 in a substantially horizontal direction. As can be seen from Figure 3, there are almost no openings 28 between the warp threads 25 constituting the anti-tensile tension band 27 and the warp threads 25 adjacent to it. Openings 28 only occur between adjacent anti-tensile tension bands 27. Therefore, with a filter material 4 having such a configuration, even if tensile tension is generated in the filter material 4 in the direction of movement and renewal, i.e., vertically, as the filter moves and is renewed, the openings 28 in the filter material 4 constituting the anti-tensile tension band 27 will not expand. The openings 28 provided between adjacent anti-tensile tension bands 27 are guarded by the anti-tensile tension bands and do not expand.

[0058] Furthermore, the formation of the anti-tensile tension band 27 is not limited to the case where warp threads 25 woven in a substantially vertical direction are woven in a substantially horizontal direction in four consecutive rows. Depending on the condition of the roll-type filter system to which the filter material 4 is attached, in other words, depending on the strength of the tensile tension associated with the movement and replacement of the filter in the roll-type filter system, it may be formed in three rows or in four or more rows.

[0059] Furthermore, there are no limitations on the formation location of the anti-tensile tension band 27, that is, any location in the width direction (lateral direction) of the filter material 4 attached to the roll-type filter system. However, as shown in Figure 4, it is preferable to form it in three locations: on both sides in the width direction and approximately in the center of the attached filter material 4. This is because, at these three locations—on both sides in the width direction and approximately in the center—approximately equal tensile tension can be generated in the width direction of the filter material 4 when the filter is wound up (when the filter is moved and replaced) in the roll-type filter system. Also, these three locations are the optimal positions for resisting tensile tension.

[0060] However, as shown in Figure 5, anti-tensile tension bands 27 may be provided at multiple locations, for example, 3 or more locations such as 5 locations, at equal intervals in the width direction of the filter material 4.

[0061] Next, the filter media opening prevention assist system will be explained. As mentioned above, the filter media 4 of the present invention has a special woven structure that is capable of sufficiently resisting the tensile tension that occurs when the filter is moved and replaced. Furthermore, the inventors have incorporated the filter media opening prevention assist system, which is capable of resisting the aforementioned tensile tension, into the roll-type filter system itself.

[0062] In other words, as mentioned above, in the case of a roll-type filter system in which the filter media 4 is moved and replaced in a straight line from top to bottom, rather than being attached to the filter surface in a zigzag wave shape, there is a risk that the back side of the filter media 4, particularly both sides in the width direction of the filter media 4, may come into contact with the surface frame material or shaft support rod 17 of the roll-type filter system that moves and replaces the filter media in a straight line. This contact may cause excessive tensile tension on the filter media 4 or damage to the back side of the filter media 4. Therefore, in the present invention, as shown in Figure 1, a plurality of guide rollers 24 are provided on the back side of the filter surface to assist in the movement and replacement of the filter media 4, and to prevent the back side of the filter media 4 from coming into contact with the surface frame material or shaft support rod 17 of the roll-type filter system. Here, the guide rollers 24 may be configured as self-driven rollers, or they may be configured as rollers without a drive source.

[0063] In this way, a guide roller 24 was set on the back side of the filter media 4 to reduce the tensile tension when winding up the filter media 4, thereby taking measures to reduce the tensile tension.

[0064] This is because, when the air conditioner is running, the filter media 4 is held down by the air pressure against the back net of the filter system, creating surface contact resistance and making it difficult to move. This generates considerable resistance when the filter media 4 is moved. In other words, this results in excessive tensile tension. Therefore, by using the guide roller 24 to reduce the aforementioned tensile tension, together with the anti-tensile tension band 27 formed on the filter media 4, the opening of the filter media 4 can be suppressed. [Explanation of Symbols]

[0065] 1. Filter media winding roller 2. Filter media winding roller 3. Roller for attaching filter media 4 Filter media 5. Both ends in the horizontal diametrical direction 6. Roller set for attaching filter media. 7 Roller set for filter media installation 8. Tension control means 11 Vertical frame 12 Horizontal frame 15 Modified parts 24 Guide rollers 25 warp threads 26 weft threads 27. Anti-tensile tension band 28 Aperture 29 Synchronized 30 synchronous band

Claims

1. A filter material used in a roll-type filter system that moves a roll of filter material onto a filter surface and then winds up the filter material that has moved onto the filter surface, thereby enabling the filter surface to be moved and renewed. The filter material is made of synthetic fibers and is formed by weaving together warp threads (vertical threads) that extend along the direction of movement of the filter surface and weft threads (horizontal threads) that extend intersecting with the warp threads (vertical threads), thereby creating an opening. In the aforementioned filter material, multiple warp threads are woven in parallel in a continuous manner to form an anti-tensile tension band that resists the tensile tension caused by the movement and renewal of the filter surface in the filter material. A filter material used in a roll-type filter system characterized by the following features.

2. The aforementioned anti-tensile tension bands are provided in multiple bands in the filter surface width direction intersecting the movement update direction of the filter surface. A filter material used in the roll-type filter system according to claim 1, characterized in that it is a filter material.

3. The anti-tensile tension band is provided in the filter surface width direction intersecting the movement update direction of the filter surface, and is located on both sides and approximately in the center of the width direction. A filter material used in the roll-type filter system according to claim 1, characterized in that it is a filter material.

4. The warp and weft threads are woven together using polyester monofilament yarn. A filter material used in a roll-type filter system according to claim 1, characterized in that...

5. A filter media opening prevention assist system used in a roll-type filter system that moves a roll of filter media onto the filter surface, allows the filter media that has moved onto the filter surface to be wound up, and ensures that the filter media moves straight in the vertical direction. The aforementioned filter media replacement assist device is positioned on the back side of the filter media to be moved and replaced on the filter surface and is formed of guide rollers that assist and promote the movement and replacement of the filter media. A filter media opening prevention assist system used in roll-type filter systems, characterized by the following features.

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