JP7122161B2 - WATER STOPPING STRUCTURE FOR LADDER-TYPE CABLE TRAY AND CONSTRUCTION METHOD - Google Patents

Description

TECHNICAL FIELD The present invention relates to a waterproof structure for a ladder-shaped cable tray that can be installed in an existing ladder-shaped cable tray that has already been installed in a room of a factory or the like and that houses a large number of cables, and a construction method thereof.

A waterproof structure for a cable tray that houses a large number of cables, such as communication cables, for connecting devices located in separate locations within a factory, etc., and a construction method thereof have already been proposed ( Japanese Patent Application Laid-Open No. 2017-73946).

A conventional waterproof structure for cable trays and a construction method thereof will be described below with reference to the drawings.

As shown in FIG. 12, this conventional cable tray water stop structure is a water stop structure for a cable tray 117 having a U-shaped cross section having a bottom plate portion 117a.

The cable tray 117 extends horizontally through the wall 119, and a large number of cables 115 are accommodated therein.

An opening closing frame 103 is attached to the wall surface of the wall 119 through which the cable tray 117 penetrates. , and a water stoppage processing frame 109 are attached in sequence, and a sealing material holding plate 111b is attached to the end of the water stoppage processing frame 109. As shown in FIG. A sealing material is filled between the sealing material pressing plates 111 a and 111 b and the cable tray 117 , and the plurality of cables 115 in the cable tray 117 positioned within the water stop processing frame 109 are A sealing material is also filled between them. A sealing material 129 is disposed on the surfaces of the fire prevention material escape frame 107, the water stop processing frame 109, and the sealing material holding plates 111a and 111b configured as described above so as to continuously cover the entire surfaces thereof.

Such a conventional water stop structure for cable trays is formed as follows.

First, as shown in FIG. 13, after a plurality of cables are stored on the cable tray 117 having the bottom plate portion 117a extending through the wall 119, the wall surface of the wall 119 through which the cable tray 117 penetrates is mounted. 14, an opening closing frame 103 having a through hole for the cable tray 117 is attached to the opening closing frame 103, an opening closing frame cover 105, a fireproof material escape frame 107, and a sealing material holding plate. 111a are attached one by one.

After attaching the sealing material pressing plate 111a, as shown in FIG. 14, a pasty seal is applied between the sealing material pressing plate 111a and the cable tray 117 and between the plurality of cables 115 located in this portion. The material 125 is filled to form the inner dam.

After that, as shown in FIG. 15, the waterproof treatment frame 109 is attached, and then the sealing material pressing plate 111b is attached. is filled with a sealing material 125 to form an outer dam.

After that, as shown in FIG. 15, the gaps between the plurality of cables 115 positioned within the water stop processing frame 109 are filled with a sealing material 127, which is a liquid pouring material, to seal the waterproof portion in the cable tray 117. Finalize.

After completing the basic waterproofing portion, that is, the waterproofing portion in the cable tray 117 as described above, the sealing material is appropriately disposed on the necessary portions of the cable tray 117 and the members disposed outside thereof. finish waterproofing the cable tray.

Here, the opening closing frame 103, the opening closing frame cover 105, the fire prevention material release frame 107, the water stopping processing frame 109, and the sealing material pressing plates 111a and 111b are each made of steel having water pressure resistance.

JP 2017-73946 A

In the process of forming the conventional waterproof structure of the cable tray described above, as shown in FIG. At 127 the gaps between the cables 115 must be filled.

Therefore, this waterproof structure can be formed in the cable tray 117 having the bottom plate portion 117a and having a U-shaped cross section. In the so-called "ladder-shaped cable tray", the sealing material 127, which is a liquid pouring material, flows down from below, so this water stop structure cannot be formed.

Furthermore, in the conventional water stop structure of the cable tray, members such as the opening closing frame 103, the opening closing frame cover 105, the fire prevention material release frame 107, the water stop treatment frame 109, and the sealing material holding plates 111a and 111b are resistant to water. Since it is made of steel having hydraulic performance, the weight of the water cutoff structure becomes considerably heavy. Therefore, if this waterproof structure is formed on a cable tray that has already been installed in the building, the burden on the wall 119 and the support of the existing cable tray will increase, and depending on the situation, these There is also a possibility that some reinforcement work will be required.

In order to solve the above problems, the present invention provides two main girders that accommodate a large number of cables and extend through the wall of the building, and a plurality of cables that are installed below them. A water stop structure provided near the wall of a ladder-shaped cable tray comprising a girder, wherein a through-hole of the ladder-shaped cable tray is provided, and a wall surface of the wall around the ladder-shaped cable tray a wall plate fixed in close contact with the wall plate; and a first sealing member filled from the bottom to the top of the ladder-shaped cable tray up to a position separated from the wall plate by a predetermined distance a first water cut-off member that is poured and filled from the bottom to the top of the ladder-shaped cable tray at a predetermined distance from the first seal member; and the first water cut-off member. a second sealing member filled from the bottom to the top of the ladder-shaped cable tray up to a position spaced apart from the end of the wall plate, and the through-hole of the wall plate and the ladder A third sealing member is disposed at the boundary portion with the cable tray, and the first waterproof member filled inside the cable tray is introduced from the surface of the wall plate surrounding the through hole. A second water stop member is disposed over the entire surface of the surface extending to the surface of the. Here, the first water-stopping member and the second water -stopping member may be made of a two-liquid mixing type polyurea resin. The sealing member may be composed of a sealing material and a putty material, and the third sealing member may be composed of the putty material. Here, the sealing material is composed of a silicone resin-based sealing material or a modified silicone resin-based sealing material, and the putty material is composed of a non-hardening type putty material having a viscosity sufficient to self-hold a fixed shape. may

Also, in order to solve the above problems, the present invention has a large number of cables housed in two main girders extending through the wall of the building and disposed below them. A method for waterproofing a ladder-shaped cable tray in the vicinity of the wall of the ladder-shaped cable tray comprising a plurality of girders, wherein the ladder-shaped cable tray extends from the wall surface of the wall to a position separated by a predetermined distance. and a water stop member to be constructed on the ladder-shaped cable tray between the construction range of the first seal member to be constructed and a position separated by a predetermined distance from the end of the construction range of the first seal member. and the construction range of the second seal member to be constructed on the ladder-shaped cable tray between the end of the construction range of the water stop member and a position separated by a predetermined distance from the end of the construction range of the waterproof member. and a second step of filling a sealing material into the gap between the multiple cables and the space inside the master girder located in the installation range of the first sealing member and the installation range of the second sealing member. and the putty material is filled up to the upper end of the ladder-shaped cable tray in the upper surface portion of the construction range of the first sealing member and the construction range of the second sealing member filled with the sealing material. a third step of applying the first sealing member on the upper surface of the backing plate covering the entire lower end side of the ladder-shaped cable tray positioned within the application range of the second sealing member from the wall surface; Block-shaped members are formed in advance such that the putty material→sealing material→putty material is positioned in order from the wall side at two portions located below the range and the application range of the second sealing member. a fourth step in which the block-shaped member is formed at two locations on the backing plate so that the upper surface portions of the two block-shaped members are respectively within the working range of the first sealing member; The backing plate is fixed to the lower end side of the ladder-shaped cable tray by a fixing means such as a clamp so as to be in close contact with the lower end surface of the sealing material already arranged in the construction range of the second sealing member. and a fifth step of mixing two liquids of a two-liquid mixing type polyurea resin in the construction range of the waterproof member of the ladder-shaped cable tray, and from the upper surface of the backing plate to the upper end of the ladder-shaped cable tray. and a seventh step of removing only the backing plate from the lower end portion of the ladder-shaped cable tray by removing the fixing means after the two-liquid mixed polyurea resin has hardened. and the ladder-shaped cable A wall plate having a through hole for a ladder-shaped cable tray is fixed so as to be in close contact with the wall surface of the wall through which the ladder-shaped cable tray penetrates, and the wall plate and the ladder-shaped cable tray are attached to the boundary portion of the wall plate and the ladder-shaped cable tray. an eighth step of disposing a putty material; and the water cutoff in which the two-liquid mixed polyurea resin of the ladder-shaped cable tray is filled and solidified from the surface of the wall plate surrounding the through-hole. and a ninth step of applying the two-liquid mixed polyurea resin to the entire surface portion of the ladder-shaped cable tray extending to the construction range of the member after mixing the two liquids. It is something to do. Here, after the seventh step and before the eighth step, a step of smoothing the surfaces of the first sealing member and the second sealing member using the putty material is further included. may be Also, the backing plate may be a polyacetal plate, a polyethylene plate, or a Teflon (registered trademark) plate. Further, the sealing material may be a silicone resin based sealing material or a modified silicone resin based sealing material, and the putty material may be a non-curing type putty material having a viscosity sufficient to self-hold a fixed shape.

According to the present invention, the structure is simpler and lighter than the conventional waterproof structure applicable to the existing ladder-shaped cable tray, and the burden on the support and the wall of the existing ladder-shaped cable tray is reduced. It is possible to provide a waterproof structure for a ladder-shaped cable tray that can be installed without increasing the number, and a construction method thereof.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the structure of Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the structure of Example 1 of this invention. It is explanatory drawing of the construction method of Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the construction method of Example 1 of this invention, (a) is a perspective view, (b) is the AA sectional drawing. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the construction method of Example 1 of this invention, (a) is a perspective view, (b) is the AA sectional drawing. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the construction method of Example 1 of this invention, (a) is a perspective view, (b) is the AA sectional drawing. It is explanatory drawing of the construction method of Example 1 of this invention. It is explanatory drawing of the construction method of Example 1 of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the construction method of Example 1 of this invention, (a) is a perspective view, (b) is the AA sectional drawing. It is explanatory drawing of the construction method of Example 1 of this invention. It is explanatory drawing of the construction method of Example 1 of this invention. and FIG. 10 is a perspective view showing the configuration of a conventional water stop structure for a cable tray. FIG. 3 is an explanatory diagram of a construction method of a conventional water stop structure for a cable tray; FIG. 3 is an explanatory diagram of a construction method of a conventional water stop structure for a cable tray; FIG. 3 is an explanatory diagram of a construction method of a conventional water stop structure for a cable tray;

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the configuration of Example 1 of the present invention.

In FIG. 1, a cable tray 1 containing a plurality of cables 2 extends horizontally through a wall 3 of a building. This cable tray 1 is composed of two main girders 1a arranged in parallel and a plurality of secondary girders 1b arranged so as to extend in a direction perpendicular to the extending direction of the main girders 1a. A structured ladder cable tray.

Reference numeral 20 denotes a second sealing member arranged inside the cable tray 1, 30 denotes a water stop member arranged inside the cable tray 1, and 40 denotes a water stop member arranged on the surface of the cable tray 1. It is an arranged water stop member.

FIG. 2 shows the configuration of the first embodiment before the waterproof member 40 is provided.

As shown in FIG. 2, the water stop structure according to the first embodiment before installing the water stop member 40 includes the wall plate 4 fixed in close contact with the wall surface of the wall 3 of the building, and the wall A third seal member 5 arranged at the boundary between the face plate 4 and the cable tray, a first seal member 10 arranged inside the cable tray 1, a water stop member 30, and a second and a sealing member 20 .

Here, the range in which the water stop member 30 is arranged (the length in the extending direction of the main girder 1a) is a range predetermined according to conditions such as the size of the existing cable tray 1, and the first The range (the length in the extending direction of the main beam 1a) in which the sealing member 10 and the second sealing member 20 are arranged is also a predetermined range determined by various conditions. The first sealing material 10 and the second sealing material 20 function as dam materials that prevent leakage of the liquid water-stopping member when forming the water-stopping member 30 .

In the present embodiment 1, the material for forming the waterproof member 30 is excellent in water stopping function after hardening. A two-liquid mixed polyurea resin is selected because it is possible to control the curing speed and the maximum liquid temperature of the waterproof member to some extent. By using such a two-liquid mixed polyurea resin, it is possible to form the waterproof member 30 in a state in which deterioration of the covering material of the cable 2 due to heat is suppressed by controlling the liquid temperature in the liquid state.

The first sealing member 10 and the second sealing member 20 are formed by combining a non-hardening putty material having a viscosity sufficient to self-hold a fixed shape and a paste-like sealing material. . For both the putty material and the sealing material, it is necessary to select and use materials that do not chemically react with the two-liquid mixed type polyurea resin that is the material of the waterproof member 30. For example, for the putty material, olefin-based Any putty made of resin, polybutene-based resin, magnesium hydroxide mixed with hydrocarbon-based resin, or the like can be used as the putty in the first embodiment. Any resin-based or modified silicone resin-based sealing material can be used as the sealing material of the first embodiment.

Next, the construction method of the present Example 1 comprised as mentioned above is demonstrated using drawing.

As shown in FIG. 3, when installing a ladder-shaped cable tray 1 consisting of a main girder 1a and a follower girder 1b which are arranged so as to extend horizontally while penetrating a wall 3. First, the construction range of the first seal member 10, the construction range of the water stop member 30, and the construction range of the second seal member 20 are determined in order from the wall surface side of the wall 3 in consideration of various conditions. For example, if the cable tray 1 has a width of 300 mm (the length of the secondary girder 1b) and a thickness of 100 mm (the height of the main girder 1a), the first sealing member 10 is installed in the longitudinal direction of the main girder 1a. The range is about 100 mm, the construction range of the waterproof member 30 is about 150 mm, and the construction range of the second seal member 20 is about 100 mm, and the positions of the ends of each range are determined.

Next, as shown in FIG. 4(a), the sealing material 21 is filled in the gaps between the multiple cables 2 located within the construction range of the first and second sealing members determined as described above. do. FIG. 4(b) is a sectional view taken along the line AA of FIG. 4(a). As shown in FIG. 4(b), the sealing material 21 is filled in the range from the lower ends to the upper ends of the multiple cables 2. As shown in FIG.

Next, as shown in FIG. 5(a) and its AA sectional view in FIG. A sealing material 21 is filled in the concave portion inside the .

After filling the sealing material 21 as described above, putty material 22 is filled up to the upper end of the main beam 1a on the upper surface side as shown in FIG. AA sectional view of FIG. 6(a)).

Next, as shown in FIG. 7(a), the entire lower end side of the cable tray 1 is covered to the installation range of the first sealing member, the installation range of the water stop member, and the installation range of the second sealing member. A backing plate 50 abutting against the wall surface of the cover wall 3 is prepared in advance, and the top surface of the backing plate 50 is positioned below the construction range of the first sealing member and the construction range of the second sealing member. A block-shaped member composed of a putty material 22 and a sealing material 21 is formed at each of the two portions where the sealing material 21 is to be formed. This block-shaped member is constructed such that the putty material 22→sealing material 21→putty material 22 is arranged in order from the wall 3 side. The height of this block-shaped member is such that when the backing plate 50 is brought into close contact with the lower end of the cable tray 1, the upper end surface of the block-shaped member fills the gap between the cables 2 disposed above it. The height is selected so as to be in close contact with the lower end surface of the sealing material 21 that is used.

As described above, the backing plate 50 having the two block-shaped members is brought into close contact with the lower end of the cable tray 1 as shown in FIG. 7(b). FIG. 8 shows a longitudinal sectional view in this state. In the state shown in FIG. 8, the process of forming the first seal member 10 and the second seal member 20 shown in FIG. 2 is completed. As shown in FIG. 8, in this state, the left and right sealing members 10 and 20 function as dam members, and the backing plate 50 closes the lower end surface side of the cable tray 1. Even if a liquid water-stopping member is poured into the construction range of the enclosed water-stopping member 30 (see FIG. 2), the liquid water-stopping member does not leak outside.

In the state shown in FIG. 7(b), the backing plate 50 is fixed to the cable tray 1 by a fixing means such as a clamp 51 or a belt as shown in FIG. 9(a). Next, as shown in FIG. 9A, a liquid 31 obtained by mixing a two-component polyurea resin main agent and a curing agent is poured into the construction range of the waterproof member up to the upper end of the cable 2 .

9(b) is a cross-sectional view taken along line AA of FIG. 9(a), and FIG. 10 is a vertical cross-sectional view of FIG. 9(a).

Wait for a while in this state, and when the polyurea resin liquid 31 that has been poured in hardens and the temperature drops to a level where it is safe to touch with a finger, the base resin and the hardener are added as shown in FIG. 11(a). is poured up to the upper end of the main beam 1a of the cable tray 1, and the liquid 31 is waited for hardening.

The reason why the polyurea resin liquid 31 is poured twice in this way is to reduce the influence of the liquid temperature on the coating material of the cable 2 as much as possible because the liquid temperature rises when the polyurea resin is cured. is.

Next, the clamp 51 that has fixed the backing plate 50 to the cable tray 1 is removed, and only the backing plate 50 is removed from the cable tray 1 as shown in FIG. 11(b). As described above, the construction of the first seal member 10, the waterproof member 30, and the second seal member 20 shown in FIG. 2 is completed. After removing the backing plate 50 from the cable tray 1, the putty material 22 is used to shape the ground sides of the first sealing member 10 and the second sealing member 20. As shown in FIG. If the unevenness of the surfaces of the first sealing member 10 and the second sealing member 20 is smoothed out by the putty material 22 in this way, the surface is coated with a polyurea resin in the final step described later and disposed. In this case, uneven coating does not occur, so that the waterproof effect of the cured polyurea resin against water pressure can be enhanced.

Next, as shown in FIG. 2, a wall plate 4 made of a steel plate or the like having through holes for the cable tray 1 is fixed to the wall surface around the cable tray 1 so as to be in close contact with the wall plate 4. A third seal member 5 is disposed at the boundary between the cable tray 1 and the cable tray 1 . This third sealing member is composed of the putty material 22 used for the first and second sealing members in the first embodiment.

Finally, a liquid of polyurea resin mixed with a main agent and a curing agent (water stopping liquid) is applied over the entire surface of the wall plate 4 from the surface around the through hole to the surface of the water stopping portion 30. The same polyurea resin liquid as that for the member 30) is applied, and the waterproof construction is completed after the hardening of the resin. It should be noted that, prior to the construction of the present embodiment 1, a member such as a calcium silicate plate that can be coated with a two-liquid mixed polyurea resin liquid has already been installed on the wall surface around the cable tray 1 as fireproof construction. In this case, it is possible to regard the member constructed for fire resistance as the wall panel 4 in the present embodiment 1, and carry out the construction of the present embodiment 1 without installing a new wall panel 4. can.

Here, regarding the backing plate 50 used in the process of forming the waterproof member 30, if the backing plate 50 is made of a material that can be easily peeled off after the two-liquid mixing type polyurea resin hardens, , construction work can be easily carried out. For this reason, a polyacetal plate is used as the backing plate 50 in the first embodiment. The same effect can be obtained by using a polyethylene plate or a Teflon (registered trademark) plate instead of a polyacetal plate as the backing plate 50 .

Further, as explained above, in the present embodiment 1, the waterproof structure according to the present embodiment 1 can be formed if the backing plate can be brought into close contact with the entire lower end of the cable tray in the construction range. can do Therefore, the water cutoff structure according to the first embodiment can be formed even for an existing cable tray that is curved in the horizontal direction just in front of the penetrating wall.

1 Ladder-shaped cable tray 1a Main girder 1b Subgirder 2 Cable 3 Wall 4 Wall panel 5, 10, 20 Sealing member 21 Sealing material 22 Putty material 30, 40 Water stop member 31 Polyurea resin liquid 50 Backing plate

Claims (8)

Said wall of a ladder-shaped cable tray which accommodates a large number of cables and consists of two main girders extending through the wall of the building and a plurality of sub-girders arranged below them. A water stop structure provided in the vicinity,
a wall plate provided with a through hole for the ladder-shaped cable tray and fixed in close contact with the wall surface of the wall around the ladder-shaped cable tray;
a first sealing member filled from the bottom to the top of the ladder-shaped cable tray up to a position spaced apart from the wall plate;
a first water cutoff member that is poured and filled from the bottom to the top of the ladder-shaped cable tray at a predetermined distance from the first seal member;
a second sealing member filled from the bottom to the top of the ladder-shaped cable tray up to a position spaced apart by a predetermined distance from the end of the first waterproof member;
A third sealing member is provided at a boundary between the through hole of the wall plate and the ladder-shaped cable tray, and the inside of the cable tray is filled from the surface of the wall plate around the through hole. A water-stopping structure for a ladder-shaped cable tray, wherein a second water- stopping member is disposed over the entire surface of the first water-stopping member. 2. The water stop structure for a ladder-shaped cable tray according to claim 1, wherein said first water stop member and said second water stop member are made of two-liquid mixed polyurea resin. The first sealing member and the second sealing member are composed of a sealing material and a putty material, and the third sealing member is composed of the putty material. 3. A water stop structure for a ladder-shaped cable tray according to item 2. The sealing material is composed of a silicone resin-based sealing material or a modified silicone resin-based sealing material, and the putty material is composed of a non-curing putty material having a viscosity sufficient to self-hold a fixed shape. The waterproof structure for a ladder-shaped cable tray according to claim 3. Said wall of a ladder-shaped cable tray which accommodates a large number of cables and consists of two main girders extending through the wall of the building and a plurality of sub-girders arranged below them. A water stop construction method for a ladder-shaped cable tray in the vicinity,
A predetermined range from the end of the construction range of the first seal member to be constructed on the ladder-shaped cable tray between the wall surface of the wall and a position separated by a predetermined distance, and the end of the construction range of the first seal member. The construction range of the waterproof member to be constructed on the ladder-shaped cable tray up to a position separated by a distance, and the ladder-shaped cable between the end of the construction range of the waterproof member and a position separated by a predetermined distance. a first step of determining the application range of the second sealing member to be applied to the tray;
a second step of filling a gap between the multiple cables and a space inside the main girder with a sealing material, which are located in the installation range of the first sealing member and the installation range of the second sealing member;
A third putty material is filled up to the upper end of the ladder-shaped cable tray on the top surface of the construction range of the first sealing member and the construction range of the second sealing member filled with the sealing material. the process of
The upper surface portion of the backing plate covering the entire lower end side of the ladder-shaped cable tray located within the construction range of the second seal member from the wall surface and the construction range of the second seal member. Fourth, block-shaped members are formed in advance such that the putty material→sealing material→putty material is positioned in order from the wall side at two portions located below the construction range of the sealing member. process and
The backing plate having the block-shaped members formed at two locations is configured so that the upper surface portions of the two block-shaped members are respectively the installation range of the first sealing member and the installation range of the second sealing member. a fifth step of fixing the backing plate to the lower end side of the ladder-shaped cable tray by a fixing means such as a clamp so as to be in close contact with the lower end surface of the sealing material already arranged in each of the
Two liquids of a two-liquid mixing type polyurea resin are mixed in the construction range of the waterproof member of the ladder-shaped cable tray, and filled by pouring from the upper surface of the backing plate to the upper end of the ladder-shaped cable tray. a sixth step of
a seventh step of removing only the backing plate from the lower end portion of the ladder-shaped cable tray by removing the fixing means after the two-liquid mixed polyurea resin has hardened;
A wall plate having a through hole for the ladder-shaped cable tray is fixed so as to be in close contact with the wall surface of the wall through which the ladder-shaped cable tray penetrates, and the wall plate and the ladder-shaped cable tray are bonded together. an eighth step of disposing the putty material on the boundary;
The ladder-shaped cable tray extends from the surface of the wall plate surrounding the through-hole to the construction range of the waterproof member in which the two-liquid mixed polyurea resin of the ladder-shaped cable tray is filled and solidified. and a ninth step of applying the two-liquid mixing type polyurea resin to the surface of the above after mixing the two liquids over the entire surface of the ladder-shaped cable tray. After the seventh step and before the eighth step, the method further includes a step of smoothing surfaces of the first sealing member and the second sealing member using the putty material. The method for waterproofing a ladder-shaped cable tray according to claim 5. 7. The method for waterproofing a ladder-shaped cable tray according to claim 5, wherein the backing plate is a polyacetal plate, a polyethylene plate or a Teflon (registered trademark) plate. The sealing material is a silicone resin sealing material or a denatured silicone resin sealing material, and the putty material is a non-hardening putty material having a viscosity sufficient to self-hold a fixed shape. 7. The method for waterproofing a ladder-shaped cable tray according to claim 5 or claim 6.

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