JP2014173293A - Glass screen structure and glass screen construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake-resistant glass screen structure which is simple in structure and can be constructed in a short construction period, and a glass screen construction method.SOLUTION: In an inventive glass screen structure 10, a seal material 20 installed in a central vicinity 18A of each of joint parts 18 has sufficient tensile strength, shear strength, and adhesive strength against a force such as wind pressure acting in an out-of-plane direction of a surface glass 14. Even if a difference in displacement amount between a surface glass 14 and a mullion glass 16 becomes large when relative story displacement occurs in a skeleton 22 due to an earthquake or the like, an upper part and a lower part of the mullion glass 16 move uniquely without being substantially restricted by the surface glass 14, because a cut 26 is provided in each of the upper and lower seal materials 20 of the mullion glass 16. That is, the upper and lower seal materials 20 provided with the cuts absorb the difference in movement between the surface glass 14 and the mullion glass 16 in the case of occurrence of the relative story displacement.

Description

  The present invention relates to a glass screen structure and a glass screen method.

  In recent years, many glass screen structures in which an opening of a building such as a building is constituted by a large glass screen have been constructed.

  The glass screen structure includes a surface glass and a vertical glass in which a plurality of glass plates are arranged flush or have a predetermined angle. The vertical glass is disposed along the joint portion located in the vertical direction of the glass plate adjacent to the surface glass and is bonded to the surface glass in a predetermined angular direction by a sealing material placed along the joint portion. The As the sealing material, a high modulus sealing material having sufficient tensile strength, shear strength, and adhesive strength against a force such as wind pressure acting in the out-of-plane direction of the surface glass is used.

  In addition, the lower end part of the surface glass and the vertical glass is fixed to the lower fixed frame fixed to the housing, and the upper end part is fixed to the upper fixed frame.

  In the glass screen structure, the displacement of the face glass and the vertical glass when an interlayer displacement occurs in the housing due to an earthquake or the like will be described with reference to a schematic diagram shown in FIG.

  In FIG. 6, reference numeral 1 is a glass plate, reference numeral 2 is a face glass, and a broken line indicated by a reference numeral 3 is vertical glass. Since the upper end of the vertical glass 3 is completely fixed to the casing 5 via the upper fixing frame 4 and the lower end of the vertical glass 3 is completely fixed to the casing 5 via the lower fixing frame 6, the casing 5 is In response to an interlayer displacement due to an earthquake or the like, a force in the D direction acts on the upper fixed frame 4 side of the housing 5, a force in the E direction acts on the lower fixed frame 6 side, the housing tilts in the CC direction, and the displacement amount X The upper end and the lower end of the vertical glass 3 produce the same interlayer displacement amount X as that of the casing 5.

  On the other hand, the surface glass 2 receives the restraint of the sealing material (not shown) between the adjacent glass plates 1,... And the inertial force due to the weight of the glass plate 1 itself. In comparison, the interlayer displacement Y of the surface glass 2 generally tends to be small. That is, as an original phenomenon, the face glass 2 and the vertical glass 3 try to move differently during an earthquake.

  However, since the face glass 2 and the vertical glass 3 are bonded together by a high modulus sealing material cast over the entire joint 7, the vertical glass 3 and the vertical glass 3 are counteracted against the above-described action of different movement. The surface glass 2 and the vertical glass 3 try to perform the same movement in the portions other than the upper end portion and the lower end portion of the glass 3 (near the center), but as described above, the upper end portion and the lower portion of the vertical glass 3 are the casings. 5, the difference in displacement amount between the surface glass 2 and the vertical glass 3 increases in the vicinity of the upper end portion and the lower end portion.

  Therefore, the vertical glass 3 causes a substantially S-shaped displacement as shown by a broken line in FIG. 6, and the upper vicinity portion G and the lower vicinity portion F slightly from the center with respect to the upper end portion and the lower end portion of the vertical glass 3. Thus, a large bending load is applied to the vertical glass 3, and the vertical glass 3 may be damaged depending on the scale of the earthquake.

  In patent document 1, in order to solve the said problem, while suspending a surface glass from an upper housing, it is vertical glass via the double frame structure which slidably isolate | separates the lower end part of a vertical glass, and a lower housing. Is supported by the lower housing.

  According to Patent Document 1, due to the sliding action of the double frame structure, the vertical glass moves in the same manner as the face glass during an earthquake. Thereby, since a big bending displacement and bending stress are not added to the upper part vicinity of a vertical glass, and a lower part vicinity, a seismic performance is exhibited.

  However, since the glass screen structure of Patent Document 1 requires the double frame structure having a complicated structure, there is a problem that the entire glass screen structure has a complicated structure and the construction period is long.

  On the other hand, in the glass screen method disclosed in Patent Document 2, a sealant placed on the joint is used, a sealant with a high modulus is used in the vicinity of the center, and a medium modulus or a low modulus is used in the upper and lower parts excluding the vicinity of the center. By using this seal material, it has a mechanism to absorb the difference in movement during an earthquake.

  Since the structure of the glass screen structure of Patent Document 2 is simpler than the glass screen structure of Patent Document 1 provided with the double frame structure, there is an advantage that the construction period can be shortened. In addition, the said center vicinity part means the part containing the center part and the upper and lower vicinity part of a center part.

  The modulus of the sealing material is 50% modulus tensile stress (150%, which is 50% longer than the original length) when tested by the tensile adhesion test described in JIS A5758: 2010. (It means the tensile stress when it becomes length.) High modulus, medium modulus, and low modulus tensile stresses are described in US Pat.

  As the material for the high modulus and medium modulus sealant, silicone sealants such as deacetic acid type, deoxime type, and dealcohol type can be used. As the material for the low modulus sealing material, a silicone-based sealing material such as a deamidation type or a deamination type can be used.

JP-A-56-3784 Japanese Patent Laid-Open No. 9-67883

  However, since the glass screen structure of Patent Document 1 includes the double frame structure as described above, there is a problem that the structure becomes complicated.

  Moreover, in the glass screen construction method of patent document 2, since it is necessary to place two types of different sealing materials separately along the joint portion, it takes time and the construction period of the glass screen structure becomes long. there were.

  This invention is made | formed in view of such a situation, and it aims at providing the glass screen structure and glass screen construction method with an earthquake resistance which can be constructed in a short construction period with a simple structure.

  In order to achieve the above object, the present invention provides a flat glass in which a plurality of glass plates are arranged flush or at a predetermined angle, and a vertical direction of the glass plate adjacent to the flat glass. A glass that is disposed along a joint portion that is positioned and is bonded in a predetermined angular direction to the glass plate by a single sealing material that is placed along the joint portion. Provided is a glass screen structure, characterized in that a notch is provided in the sealing material placed in the upper part and the lower part excluding the vicinity of the center part in the height direction of the joint part.

  In order to achieve the above object, the present invention comprises a plurality of glass plates that are flush with each other or arranged at a predetermined angle to form a surface glass, and the glass plates adjacent to the surface glass By arranging the vertical glass along the joint portion positioned in the vertical direction and placing a single sealing material along the joint portion, the vertical glass is placed in a predetermined angular direction with respect to the glass plate. It is a glass screen method formed by bonding, and the sealing material is placed over the entire length of the joint portion to bond the face glass and the vertical glass, and after the sealing material is cured, Provided is a glass screen method characterized in that a notch is formed in the sealing material placed in the upper part and the lower part excluding the vicinity of the center part in the height direction of the joint part.

  According to the glass screen structure of the present invention, the seal material placed in the vicinity of the center of the joint portion has sufficient tensile strength, shear strength, Has adhesive strength. In addition, when an interlayer displacement occurs in the enclosure due to an earthquake, etc., even if the difference in displacement between the face glass and the vertical glass becomes large at the upper and lower parts of the vertical glass, the seals at the upper and lower parts of the vertical glass Since the material is provided with cuts, the upper and lower parts of the vertical glass move independently without being constrained by the face glass. That is, the sealing material provided with the notch absorbs the difference in movement between the face glass and the vertical glass when the interlayer displacement occurs. Therefore, since a large bending displacement and bending stress are not generated in the upper and lower portions of the vertical glass when the interlayer is displaced, it is possible to prevent the upper and lower portions of the vertical glass from being damaged when the interlayer displacement is generated. Therefore, the glass screen structure of the present invention has excellent seismic performance.

  According to the present invention, after the sealing material is cured, a cutting means such as a cutter forms a cut in the sealing material placed on the upper part and the lower part to reduce the adhesive force of the sealing material. In this case, a notch may be formed in the sealing material of the glass screen structure before construction in the building, or a notch may be formed in the sealing material of the glass screen structure already constructed in the building as a glass screen. Good.

  In the present invention, since a single sealing material may be driven along the joint portion, the construction period of the glass screen structure can be shortened as compared with the construction method of Patent Document 2.

  The lower end part of the surface glass and the vertical glass of the present invention is fitted into a lower fixing frame fixed to the housing. For example, when supporting the load of surface glass and vertical glass at the lower end, the lower end of the surface glass and vertical glass is fitted into the lower fixed frame, and the surface glass is placed on the setting block installed in the lower fixed frame. And the lower end part of a vertical glass is mounted. Moreover, the upper end part of a surface glass and a standing glass is engage | inserted by the upper fixed frame fixed to the housing.

  On the other hand, when the glass screen structure is a suspended structure, the lower ends of the face glass and the vertical glass are fitted into the lower fixing frame, and the upper ends of the surface glass and the vertical glass are placed via the hanging metal fittings. Attach to the chassis.

  That is, the glass screen structure of the present invention is intended for the one in which at least the lower ends of the face glass and the vertical glass are fixed to the casing through the lower fixing frame.

  In order to simplify the structure of the glass screen structure, the present invention does not use the double frame structure described in Patent Document 1, and in order to shorten the construction period of the glass screen structure, Patent Document A single sealing material is used instead of the two types of sealing materials described in 2. As the sealing material, it is preferable to use a high modulus sealing material in order to set the adhesive strength of the adhesive portion to be equal to or greater than the design allowable stress value.

  In the glass screen structure and glass screen construction method of the present invention, the upper portion and the lower portion of the joint portion are less affected by wind resistance, and the length of the upper portion and the lower portion in the height direction is It is preferable that it is 1/2 of the length of the short side of a glass plate, or 1 meter.

  When the glass screen structure is subjected to wind pressure, the sealing material receives a linear load, but most of the wind pressure is borne by the vicinity of the center of the joint, and the burden on the upper and lower portions of the joint is small. Therefore, a glass screen structure having no problem in wind-resistance and pressure-up can be configured even if the sealing material placed on the upper and lower portions of the joint portion having a small wind-resistance effect is provided with cuts. In addition, the length of the height direction of the said upper part and the said lower part is 1/2 of the length of the short side of the said glass plate, or 1 meter. Further, the lengths of 1/2 and 1 meter are not strict and include allowable values that can be assumed by those skilled in the art.

In the glass screen structure and the glass screen method of the present invention, the adhesive force of the sealing material placed on the upper portion and the lower portion of the joint portion is set to be less than a design allowable stress value, and the design allowable stress value is 0.14 N / mm ² is preferable.

The design allowable stress value of 0.14 N / mm ^{2 according to the} present invention is determined by the glass frame construction method technical guideline (draft) (Publisher: Architectural Institute of Japan, January 25, 2011, first edition, first mark, P45). Based.

  The standing glass reinforces the face glass. A vertical glass may be arranged in two directions perpendicular to the surface glass (for example, the indoor side in the vertical direction and the outdoor side in the horizontal direction) at the joints (butting portions) of the adjacent glass plates of the surface glass. As described above, in order to improve the design, the vertical glass may be arranged only in one direction (vertical direction) perpendicular to the right angle. In the latter case, since a force such as wind is generally applied from the outdoor side toward the indoor side, the surface glass is supported by the force, and thus the vertical glass is disposed on the indoor side.

  According to the present invention, it is possible to provide a glass screen structure and a glass screen method that are earthquake resistant, have a simple structure, and can be constructed in a short construction period.

The principal part expansion perspective view of the glass screen structure of embodiment Sectional drawing which follows the AA line of the glass screen structure shown in FIG. Explanatory drawing which showed the distribution of the height direction of the line load which arises in a sealing material when the glass screen structure shown in FIG. 1 receives a wind pressure Explanatory drawing which showed typically the state of the displacement which arises in a surface glass and a standing glass when the glass screen structure shown in FIG. 1 receives interlayer displacement. Enlarged cross-sectional view of the main part with cuts formed in the non-adhesive seal material Explanatory drawing which showed typically the state of the displacement which arises in a surface glass and a standing glass when the conventional glass screen structure receives interlayer displacement

  Hereinafter, preferred embodiments of a glass screen structure and a glass screen method according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an enlarged perspective view of a main part of a glass screen structure 10 according to an embodiment.

  The glass screen structure 10 is composed of a surface glass 14 in which a plurality of glass plates 12, 12... Are arranged flush with each other, and a plurality of vertical glasses 16. The vertical glass 16 is disposed along the joint portion 18 positioned in the vertical direction of the adjacent glass plates 12 and 12 of the face glass 14 and is placed along the joint portion 18 in FIG. The high modulus sealant 20 is bonded to the glass plate 12 in a direction perpendicular to the glass plate 12. FIG. 2 is a horizontal cross-sectional view taken along the line AA of the central vicinity 18A of the joint 18 shown in FIG. In addition, arrangement | positioning of the glass plates 12 and 12 is not limited to the said surface, You may arrange | position with a predetermined angle. Further, the bonding direction of the vertical glass 16 is not limited to the perpendicular direction, and may be a predetermined angular direction.

  In the glass screen structure 10 according to the embodiment, as shown in FIG. 1, the center vicinity 18A in the height direction of the joint portion 18 is set as a bonding portion between the surface glass 14 and the vertical glass 16, and the center vicinity 18A is bonded. The force is set to the design allowable stress value or more. Further, the upper portion 18B and the lower portion 18C excluding the central vicinity portion 18A in the height direction of the joint portion 18 are set as non-bonded portions between the surface glass 14 and the vertical glass 16, and the adhesive strength between the upper portion 18B and the lower portion 18C is allowed for design. It is set below the stress value.

  The upper portion 18B and the lower portion 18C of the joint portion 18 are portions where the wind pressure resistance is less affected in the glass screen structure 10, and the length in the height direction of the upper portion 18B and the lower portion 18C is the length of the short side of the glass plate 12. It is preferable that it is 1/2 or 1 meter.

  In FIG. 3, the distribution in the height direction of the line load generated in the sealing material 20 when the glass screen structure 10 receives wind pressure is indicated by hatching.

  According to the figure, most of the wind pressure is borne by the central vicinity 18A of the joint 18 and the load of the upper part 18B and the lower part 18C is small. Therefore, even if the upper portion 18B and the lower portion 18C of the joint portion 18 having little influence on wind pressure resistance are used as non-bonded portions, the glass screen structure 10 having no problem with wind pressure resistance can be configured. Further, the length in the vertical direction of the upper portion 18B and the lower portion 18C is 1/2 or 1 meter of the short side of the glass plate 12 as described above, but the length of 1/2 or 1 meter is as described above. , Which are not exact and include tolerances that can be assumed by one skilled in the art.

The design allowable stress value is preferably 0.14 N / mm ² . This value of 0.14 N / mm ² is based on the glass vertical construction technical guideline (draft) (issued by the Architectural Institute of Japan, January 25, 2011, first edition, first mark, P45).

  As shown in FIG. 1, the lower end portions of the face glass 14 and the vertical glass 16 are fitted into a lower fixing frame 24 </ b> A fixed to the housing 22. Thus, when supporting the load of the surface glass 14 and the vertical glass 16 by a lower end part, the lower end part of the surface glass 14 and the vertical glass 16 was fitted in the lower fixed frame 24A, and installed in the lower fixed frame 24A. The lower end portions of the face glass 14 and the vertical glass 16 are placed on a setting block (not shown). Further, in the glass screen structure 10 of the embodiment, the upper end portions of the face glass 14 and the vertical glass 16 are fitted into an upper fixing frame 24B fixed to the housing 22 as shown in FIG. FIG. 4 is a schematic diagram.

  On the other hand, when the glass screen structure 10 is a suspended structure, the lower ends of the surface glass 14 and the vertical glass 16 are fitted into the lower fixing frame 24A, and the upper ends of the surface glass 14 and the vertical glass 16 are It is attached to the housing 22 via a hanging metal fitting (not shown). That is, the glass screen structure 10 according to the embodiment is intended for a structure in which at least the lower ends of the surface glass 14 and the vertical glass 16 are fixed to the housing 22 via the lower fixing frame 24A.

  FIG. 4 is an explanatory view schematically showing a state of displacement generated in the face glass 14 and the vertical glass 16 when the glass screen structure 10 of FIG. 1 is subjected to interlayer displacement due to an earthquake or the like.

  As described above, the upper end portion of the vertical glass 16 is completely fixed to the housing 22 through the upper fixing frame 24B, and the lower end portion of the vertical glass 16 is completely fixed to the housing 22 through the lower fixing frame 24A. When the housing 22 is subjected to interlayer displacement due to an earthquake or the like, a force in the D direction acts on the upper fixing frame 24B side of the housing 22, a force in the E direction acts on the lower fixing frame 24A side of the housing 22, and the housing 22 is C- When tilted in the C direction and displaced by the interlayer displacement X, the upper end portion and the lower end portion of the vertical glass 16 generate the same interlayer displacement amount X as that of the housing 22.

  On the other hand, the surface glass 14 receives the restraint by the sealing material 20 (refer to FIG. 2) between the adjacent glass plates 12 and 12 and the inertial force due to the weight of the glass plate 12 itself. Compared to X, the inter-layer displacement amount Y of the surface glass 14 generally tends to be reduced. That is, as a natural phenomenon, the surface glass 14 and the vertical glass 16 try to move differently during an earthquake.

  Up to this point, the glass screen structure of Patent Document 1 and the glass screen structure 10 of the embodiment have the same action. However, in Patent Document 1, the surface glass and the vertical glass have a high modulus seal in the entire joint area. Since it is bonded with a material, the surface glass and the vertical glass try to move in the same manner in portions other than the upper and lower portions of the joint. On the other hand, the upper end portion and the lower end portion of the vertical glass move in the same manner as the casing, and thus the difference in displacement between the face glass and the vertical glass becomes large at the upper end portion and the lower end portion. Therefore, as shown in FIG. 6, the vertical glass causes a substantially S-shaped displacement, and a large bending load is applied to the vertical glass at portions F and G (see FIG. 6) slightly from the center of the upper and lower ends of the vertical glass. In some cases, the glass plate was damaged depending on the scale of the earthquake.

  On the other hand, in the glass screen structure 10 according to the embodiment, the high modulus placed in the central vicinity portion 18A of the joint portion 18 against a force such as wind pressure acting in the out-of-plane direction of the surface glass 14. The sealing material 20 has sufficient tensile strength, shear strength, and adhesive strength.

  Further, when an interlayer displacement occurs in the housing 22 due to an earthquake or the like, even if the difference in displacement between the surface glass 14 and the vertical glass 16 is large at the upper and lower portions of the vertical glass 16, Since the upper part and the lower part are non-bonded parts, the upper part and the lower part of the vertical glass 16 move independently without being constrained by the surface glass 14. That is, the vertical glass 16 absorbs the difference in movement between the surface glass 14 and the vertical glass 16 when the non-bonded portion is generated between the layers, and moves along the CC direction in FIG. Therefore, since a large bending displacement and bending stress are not generated in the upper and lower portions of the vertical glass 16 when the interlayer is displaced, the upper and lower portions of the vertical glass can be prevented from being damaged when the interlayer displacement is generated. Therefore, the glass screen structure 10 of the embodiment has excellent earthquake resistance.

  Hereinafter, the form of the non-adhesive portion will be described with reference to FIG. FIG. 5 is a horizontal cross-sectional view of the upper portion 18B (the same applies to the lower portion 18C) of the joint portion 18 along the line BB in FIG.

  The form of the non-adhesive portion shown in FIG. 5 is that the notch 26, 26 is provided in the high modulus sealing material 20 placed on the upper portion 18B (the same applies to the lower portion 18C) of the joint portion 18, so The adhesive strength is set to be less than the design allowable stress value.

  The construction method of the glass screen structure 10 having the cuts 26, 26 is to place the sealing material 20 over the entire length of the joint 18 to bond the face glass 14 and the vertical glass 16. After curing, cuts 26 and 26 are formed in the sealing material 20 of the upper portion 18B (the same applies to the lower portion 18C). That is, after the sealing material 20 is cured, the cutting material such as a cutter is used to form cuts 26 and 26 in the sealing material 20 of the upper part 18B (same as the lower part 18C), and the sealing material 20 of the upper part 18B (same as the lower part 18C). By reducing the adhesive strength, the design stress is less than the allowable stress value.

  In this case, cuts 26 and 26 may be formed in the sealing material 20 of the glass screen structure 10 before construction in the building, and the sealing material 20 of the glass screen structure 10 already constructed in the building as a glass screen. The notches 26 and 26 may be formed in.

  In this embodiment, since a single sealing material 20 may be driven along the joint portion 18, the construction period of the glass screen structure 10 can be shortened as compared with the construction method of Patent Document 2.

Further, when the surface area of the bonded portion of the sealing material 20 between the face glass 14 and the vertical glass 16 is A, the cut surface area of the cuts 26 and 26 is X, and the design allowable stress value of the bonded portion is B,
B × (X / A) <0.14 (Formula 1)
If the notch is formed in the sealing material 20 so as to obtain X satisfying the above expression 1, the adhesive force of the non-adhesive portion of the joint portion 18 can be set to be less than the design allowable stress value.

  In FIG. 5, two cuts 26 and 26 are formed from both sides of the sealing material 20, but only one cut 26 may be formed from one side.

  Further, the boundary between the central vicinity portion 18A and the upper portion 18B is provided so that the notches 26 and 26 of the sealing material 20 placed in the upper portion 18B and the lower portion 8C do not extend to the sealing material 20 placed in the central vicinity portion 18A. It is preferable that a partition member is interposed at the joint portion and the boundary joint portion between the central vicinity portion 18A and the lower portion 18C.

  Moreover, in order to simplify the structure, the glass screen structure 10 of the embodiment does not use the double frame structure described in Patent Document 1, and shortens the work period of the glass screen structure 10. Therefore, the single sealing material 20 is used without using the two types of sealing materials described in Patent Document 2. As the sealing material 20, it is preferable to use a high modulus sealing material in order to set the adhesive force of the bonded portion to be equal to or greater than the design allowable stress value.

  DESCRIPTION OF SYMBOLS 10 ... Glass screen structure, 12 ... Glass plate, 14 ... Surface glass, 16 ... Vertical glass, 20 ... Sealing material, 22 ... Housing, 24A ... Lower fixed frame, 24B ... Upper fixed frame, 26 ... Cut

Claims (6)

A surface glass in which a plurality of glass plates are flush or arranged with a predetermined angle;
A predetermined angular direction with respect to the glass plate by a single sealing material disposed along the joint portion positioned in the vertical direction of the glass plate adjacent to the surface glass and placed along the joint portion. With vertical glass glued to,
A glass screen structure comprising:
The glass screen structure according to claim 1, wherein a cut is provided in the sealing material placed in an upper portion and a lower portion excluding a portion near the center in the height direction of the joint portion.   The upper part and the lower part of the joint part are less affected by wind resistance, and the length in the height direction of the upper part and the lower part is 1/2 of the length of the short side of the glass plate, Or the glass screen structure of Claim 1 which is 1 meter. The adhesive force of the sealing material placed on the upper portion and the lower portion of the joint is set to be less than a design allowable stress value, and the design allowable stress value is 0.14 N / mm ^2. 2. The glass screen structure according to 2. A plurality of glass plates are arranged flush or at a predetermined angle to form a surface glass, and a vertical glass is disposed along a joint portion located in the vertical direction of the glass plate adjacent to the surface glass. It is a glass screen construction method in which the vertical glass is bonded to the glass plate in a predetermined angular direction by placing a single sealing material along the joint portion,
The sealing material is placed over the entire length of the joint portion, the face glass and the vertical glass are bonded, and after the sealing material is cured, a central vicinity portion in the height direction of the joint portion is formed. A glass screen method for forming a cut in the sealing material placed on the upper and lower portions.   The upper part and the lower part of the joint part are less affected by wind resistance, and the length in the height direction of the upper part and the lower part is 1/2 of the length of the short side of the glass plate, Or the glass screen construction method of Claim 4 which is 1 meter. The adhesive strength of the sealing material placed on the upper portion and the lower portion of the joint is set to be less than a design allowable stress value, and the design allowable stress value is 0.14 N / mm ^2. 5. The glass screen construction method according to 5.

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