JP3839630B2 - Laminated glass for elevator doors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sight glass that is fitted into an opening / closing door of an elevator that is formed by laminating a transparent plate glass to a meshed plate glass.
[0002]
[Prior art]
FIG. 7 is a cross-sectional view of a typical conventional elevator. A security window glass 102 is attached to the door 101 of the elevator 100, and a security glass window 112 is attached to the door 111 of the hoistway 110. Indicates the state.
By attaching the sight glass 102, 112 to each of the open / close doors 101, 111, the room 100a of the elevator 100 can be seen from the outside, so that the crime prevention effect can be enhanced.
In addition, since the sight glass 102 and 112 for crime prevention are the same members, the sight glass 102 will be described and the description of the sight glass 112 will be omitted.
[0003]
FIG. 8 is an enlarged view of part 8 of FIG.
The viewing window glass 102 is a laminated glass in which a transparent plate glass 104 that is slightly smaller than the mesh plate glass 103 is bonded to a mesh plate glass 103 with an intermediate film 105 such as polyvinyl butyral.
If the thicknesses of the glass 103, the transparent glass 104, the intermediate film 105, and the door 101 are t11, t12, t13, and t14, respectively, t11 is 6.8 mm, t12 is 2.0 mm, and t13 is 0.38 mm. In many cases, t14 is set to 1.6 mm.
[0004]
That is, the door 101 may be thin because it uses a metal plate, and the transparent plate glass 104 is relatively thick 2.0 mm for the purpose of applying pressure during the manufacturing process.
Since the transparent plate glass 104 is thicker than the open / close door 101, the inner surface (the surface on the left side) 101b of the open / close door 101 and the inner surface 104a of the transparent plate glass 104 are flush with each other by inserting a spacer 106 and adjusting the position of the transparent plate glass 104. I try to make it.
[0005]
FIG. 9 is a flowchart for explaining a conventional method for manufacturing a sight glass. In the figure, STxxx indicates a step number.
ST100: After cutting each base plate of the mesh plate glass and the transparent plate glass, the cut mesh plate glass and the transparent plate glass are washed and dried.
ST101: An interlayer film such as polyvinyl butyral is cut.
[0006]
ST102: An intermediate layer is laminated between a plate glass and a transparent plate glass in a clean room to form a three-layer plate.
ST103: A three-layer board is temporarily bonded.
ST104: The temporarily bonded three-layer plate is fully bonded (pressed) at a high temperature and high pressure in an autoclave to obtain a sight glass (ie, laminated glass).
ST105: After cleaning the viewing glass, it is dried to complete the manufacturing process of the viewing glass.
[0007]
10 (a) and 10 (b) are explanatory views of a conventional method for manufacturing a sight glass. FIG. 10 (a) explains step 102 in FIG. 9, and FIG. 10 (b) explains step 104 in FIG.
In (a), the intermediate | middle layer 105 is arrange | positioned between the meshed plate glass 103 and the transparent plate glass 104, and the meshed plate glass 103, the transparent plate glass 104, and the intermediate | middle layer 105 are bonded together as shown by the arrow a and a.
In (b), what was temporarily bonded to the three layers was heated to 120 to 150 ° C., and in this state, a pressure of 980 to 1470 KPa was applied as shown by arrows b and b, and the meshed plate glass 103 and the transparent plate glass 104 were pressure bonded. To complete the main bonding.
[0008]
[Problems to be solved by the invention]
However, as shown in FIG. 9, the manufacturing process of the sight glass 102 has many processes such as ST100 to ST105, and the process is complicated and laborious. For this reason, it is difficult to increase productivity, which causes an increase in cost.
Moreover, since the intermediate | middle layer 105 is required in order to crimp | bond the meshed plate glass 103 and the transparent plate glass 104, it becomes a factor of a cost increase.
[0009]
Furthermore, if the plate thickness t12 of the transparent plate glass 104 is made thinner than 2.0 mm by press-bonding the transparent plate glass 104 at a high pressure, the transparent plate glass 104 may be damaged. For this reason, it is necessary to set the plate thickness t12 of the transparent plate glass 104 to 2.0 mm or more, which causes a cost increase.
Further, when the plate thickness t12 of the transparent plate glass 104 is set to 2.0 mm or more, the plate thickness t14 (1.6 mm) of the open / close door 101 becomes larger. For this reason, in order to make the surface 104a of the transparent plate glass 104 flush with the inner surface 101b of the open / close door 101, a spacer 106 is required as shown in FIG.
[0010]
Furthermore, in order to press-bond the meshed plate glass 103 and the transparent plate glass 104, it is necessary to provide a heating facility for heating to 120 to 150 ° C. and a pressure facility for pressing to 980 to 1470 KPa. For this reason, equipment cost increases.
In addition, when the transparent plate glass 104 is pressure-bonded, the transparent plate glass 104 may be displaced from the netted plate glass 103, and a defective product may be formed. The defective product is disposed of, which causes an increase in the cost of the sight glass 102.
[0011]
Therefore, an object of the present invention is to provide a technique capable of reducing the cost of the sight glass.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, claim 1 of the present invention comprises a thick glass plate glass and a thin transparent plate glass, and a photo-curing adhesive is dropped on the center of the net plate glass, and the photo-curing A transparent plate glass is placed on the shape adhesive, and the photo-curable adhesive is thinly spread by its own weight and adjusted so that its thickness becomes 10 to 50 μm. A sheet glass is laminated to form a laminated glass, and the transparent sheet glass is slightly smaller than the mesh sheet glass, and is a sight glass that fits into the door of the elevator, and is attached to the metal door of the elevator. Is provided with an opening for inserting the transparent plate glass of the laminated glass, the transparent plate glass is fitted into the opening, the meshed plate glass of the laminated glass is disposed on the outer wall side of the opening / closing door, and the meshed plate glass The total thickness of the transparent plate glass and the photo-curing adhesive that bonds the transparent plate glass to the mesh plate glass is substantially the same as the plate thickness of the opening / closing door. The inner surface of the transparent plate glass is substantially flush with the inner wall of the door .
[0013]
A second aspect of the present invention is characterized in that, in the first aspect, a photo-curing adhesive having a viscosity of 10 to 100 cp is dropped onto a central portion of the meshed plate glass.
[0014]
In the present invention, the present invention comprises a thick netted plate glass and a thin transparent plate glass, and a photocurable adhesive is dropped on the center of the netted plate glass and is transparent on the photocurable adhesive. A sheet glass is placed, the photo-curing adhesive is thinly spread by its own weight and adjusted to have a thickness of 10 to 50 μm, and the two sheet glasses are bonded together by the photo-curing adhesive. since the formation of the lamination glass, it is not necessary to use an intermediate film required in the conventional case I were glass (polyvinyl butyral). Moreover, the thickness of the transparent plate glass can be set to be substantially the same as the plate thickness of the door of the elevator. For this reason, the transparent plate glass can be flush with the open / close door only by applying the plate glass with mesh to the open / close door.
In Claim 2, since the photocurable adhesive set to a viscosity of 10 to 100 cp is dropped on the center of the meshed plate glass, the viscosity is set to 10 cp or more so that the mesh is kept at the center of the meshed plate glass 26. Thus, by setting the viscosity to 100 cp or less, the photo-curing adhesive can be spread thinly by the weight of the transparent plate glass.
[ 0015 ]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a laminated glass according to the present invention. By attaching a laminated glass 20 for crime prevention to the door 14 of the elevator 10, the crime prevention effect can be achieved by making the interior 12 of the elevator 10 visible from the outside. Shows an elevated state.
In addition, the elevator 10 and the opening / closing door 14 are the same members as the elevator 100 and the opening / closing door 101 of the prior art, and description thereof is omitted.
[ 0016 ]
The laminated glass 20 includes a rectangular mesh plate glass 21, a transparent plate glass 24 that is slightly smaller than the mesh plate glass 21, and an ultraviolet curable type as a photocurable adhesive interposed between the mesh plate glass 21 and the transparent plate glass 24. It is a sight glass comprising an adhesive 26.
Since the netted plate glass 21 and the transparent plate glass 24 are bonded together with the ultraviolet curable adhesive 26, an intermediate film (for example, polyvinyl butyral) required for the laminated glass can be removed.
For this reason, the cost of the laminated glass 20 can be reduced.
[ 0017 ]
By the way, although it is the transparent plate glass 24, as a plate glass, any of plate glass by arbitrary manufacturing methods, such as a float plate glass with high flatness and smoothness, a plate glass by a full call method, or a plate glass by a Colburn method, can be used. it can.
As described above, the float plate glass is preferable because it is excellent in flatness and smoothness as a raw material and has good quality.
Although explained as a transparent plate glass, the transparent plate glass includes a plate glass coated on the surface and a plate glass colored in green, bronze, gray or the like.
That is, the term “transparent” may be used as long as the visibility inside and outside the room can be sufficiently secured through the transparent glass sheet.
As described above, the transparent plate glass in the present invention includes a translucent plate glass and a colored plate glass capable of sufficiently ensuring visibility inside and outside the plate glass.
[ 0018 ]
The laminated glass 20 applies the periphery 22 of the meshed plate glass 21 to the outer wall 16 of the opening / closing door 14, and inserts the transparent plate glass 24 into the opening 15 of the opening / closing door 14, and holds the upper and lower sides of the periphery 22 with mounting members 30, 30. Then, the mounting members 30, 30 are fastened with bolts 32 ... and nuts 34 ... to be attached to the open / close door 14.
[ 0019 ]
The meshed plate glass 21 has a plate thickness t1 set to 6.8 mm.
The transparent plate glass 24 is a glass that is formed so as to be slightly smaller than the mesh plate glass 21 and can be fitted into the opening 15 of the open / close door 14 and has a plate thickness t2 set to 1.6 mm.
The ultraviolet curable adhesive 26 has a thickness t3 set to 10 to 50 μm (0.01 to 0.05 mm).
[ 0020 ]
The thickness t2 of the transparent plate glass 24 is set to 1.6 mm, and the thickness t3 of the ultraviolet curable adhesive 26 is set to 10 to 50 μm (0.01 to 0.05 mm). The inner surface 25 of the transparent glass plate 24 can be made substantially flush with the inner wall 17 of the open / close door 14.
Therefore, since it is not necessary to arrange the spacer 106 (shown in FIG. 7) of the prior art between the meshed plate glass 21 and the open / close door 14, the attaching operation of the laminated glass 20 can be simplified. For this reason, the cost of the laminated glass 20 and the attachment cost of the laminated glass 20 can be reduced.
Reference numeral 36 denotes a rubber member that receives the meshed plate glass 21.
[ 0021 ]
FIG. 2 is a perspective view of the laminated glass according to the present invention. A rectangular transparent plate glass 24 that is slightly smaller than the meshed plate glass 21 is pasted with an ultraviolet curable adhesive 26 in the center of the rectangular meshed plate glass 21. In addition, the thickness 22 (t2 + t3) of the transparent plate glass 24 and the ultraviolet curable adhesive 26 is set to 1.61 to 1.65 mm, and the thickness t4 of the open / close door 14 (see FIG. 1). (Shown) is substantially the same as 1.6 mm.
Therefore, the inner surface 25 of the transparent glass plate 24 can be substantially flush with the inner wall 17 of the open / close door 14 shown in FIG.
In addition, 23 is a metal net | network, and the metal net | network 23 is a member which comprises the net plate glass 21 by being embedded in glass.
[ 0022 ]
The manufacturing method of the laminated glass described above is demonstrated below.
FIG. 3 is a flowchart illustrating a method for producing a laminated glass according to the present invention, where STxx indicates a step number.
ST10: After cutting each base plate of the mesh plate glass and the transparent plate glass, the cut mesh plate glass and the transparent plate glass are washed and dried.
ST11: A transparent plate glass is adhered to a meshed plate glass with an ultraviolet curable adhesive, and the protruding adhesive is wiped off.
ST12: By irradiating the ultraviolet curable adhesive with ultraviolet rays to cure the ultraviolet curable adhesive, the transparent plate glass is bonded to the meshed plate glass with sufficient adhesive strength. This completes the manufacturing process of the laminated glass.
[ 0023 ]
According to the present invention, the netted plate glass and the transparent plate glass are bonded to each other with the photocurable adhesive, and then the netted plate glass and the transparent plate glass are bonded with sufficient strength by simply curing the photocurable adhesive with light. Can be pasted together.
For this reason, since the manufacturing process of laminated glass can be simplified, productivity can be improved and the cost of laminated glass can be suppressed.
[ 0024 ]
4 (a) to 4 (c) are first explanatory views of the method for producing a laminated glass according to the present invention. The first half of ST11 in FIG. 3 will be described in detail with reference to (a) to (c).
In (a), the mesh plate glass 21 is placed horizontally on the mounting table 40, the mesh plate glass 21 is covered with a jig 42, and the liquid UV curable adhesive 26 is applied to the center of the mesh plate glass 21 by the supply cylinder unit 44. A predetermined amount is dropped.
In (b), the transparent glass plate 24 is placed on the liquid ultraviolet curable adhesive 26 as indicated by arrows (1) and (1). At this time, the transparent plate glass 24 is positioned by the jig 42.
[ 0025 ]
In (c), the transparent ultraviolet light curable adhesive 26 is thinly spread as indicated by arrows (2) and (2).
By using the ultraviolet curable adhesive 26, it is not necessary to press the transparent plate glass 24. For this reason, since thickness t2 of the transparent plate glass 24 can be set thinly to 2.0 mm or less (for example, 1.6 mm), the cost of the laminated glass 20 shown in FIG. 2 can be reduced.
Moreover, since a heating apparatus and a pressurizing apparatus are not required, equipment cost can be reduced.
Furthermore, since the transparent plate glass 24 does not have to be pressure-bonded, there is no fear that the transparent plate glass 24 is displaced from the meshed plate glass 21 when the transparent plate glass 24 is bonded.
[ 0026 ]
Here, the viscosity of the liquid ultraviolet curable adhesive 26 will be described.
Viscosity refers to resistance generated inside a flowing body, and is expressed as viscosity = τ / (dv / dy).
However, τ is a shear stress (1 kgf / m ² ≈98 KPa) acting on the surface parallel to the flow due to the flow at a certain point in the laminar flow, and (dv / dy) is It is a velocity gradient (1 / s) in a direction perpendicular to the direction.
Pascal · second (Pa · s) or poise (P) is used as the unit of viscosity, but centipoise (cP) is used because the ultraviolet curable adhesive 26 has low viscosity.
[ 0027 ]
The liquid ultraviolet curable adhesive 26 is an adhesive having a viscosity set to 10 to 100 cP.
When the viscosity is less than 10 cP, the UV curable adhesive 26 spreads thinly and flows out only by dropping the liquid UV curable adhesive 26 into the center of the meshed plate glass 21. Therefore, the viscosity is set to 10 cP or more so as to stay in the center of the meshed plate glass 26.
On the other hand, if the viscosity exceeds 100 cP, the ultraviolet curable adhesive 26 cannot be thinly spread on the liquid ultraviolet curable adhesive 26 by the weight of the transparent plate glass 24. Therefore, by setting the viscosity to 100 cP or less, the ultraviolet curable adhesive 26 can be spread thinly by its own weight of the transparent plate glass 24.
[ 0028 ]
5 (a) to 5 (c) are second explanatory views of the method for producing a laminated glass according to the present invention, and (a) to (b) explain in detail the latter half of ST11 in FIG. 3 will be described in detail.
In (a), the jig 42 is removed from the meshed plate glass 21 as indicated by arrows (3) and (3).
In (b), the liquid ultraviolet curable adhesive 26 leaked to the periphery 22 of the meshed plate glass 21 is wiped off.
[ 0029 ]
In (c), the meshed plate glass 21 is placed on the support frames 46 and 46 and disposed above the ultraviolet lamp 48 (which preferably has a main wavelength of 365 Nm). In this state, ultraviolet rays are irradiated from the ultraviolet lamp 48 to cure the ultraviolet curable adhesive 26, and the transparent plate glass 24 is bonded to the meshed plate glass 21 with sufficient adhesive strength by the ultraviolet curable adhesive 26. This completes the manufacturing process of the laminated glass 20.
The relationship between the adhesive strength of the ultraviolet curable adhesive 26 and the curing time will be described with reference to the following diagram.
[ 0030 ]
FIG. 6 is a graph showing the relationship between the adhesive strength of the ultraviolet curable adhesive of the laminated glass according to the present invention and the curing time, and shows an example of irradiation with an ultraviolet lamp 48 having a wavelength of 365 Nm.
The vertical axis represents the adhesive strength of the ultraviolet curable adhesive, and the horizontal axis represents the curing time. The bond strength is represented by tensile shear strength, compression shear strength, peel strength, etc., but here it is represented by compression shear strength.
As is apparent from this graph, the ultraviolet curable adhesive 26 starts to be cured after 5 minutes from the irradiation of the ultraviolet lamp 48 and is completely cured after 15 minutes. The adhesive strength when the UV curable adhesive 26 is completely cured is 14700 KPa.
[ 0031 ]
By setting the curing time to 15 minutes, there is no concern that the ultraviolet curable adhesive 26 is cured during the manufacturing process of the laminated glass 20. For this reason, the laminated glass 20 can be manufactured easily.
Moreover, since the transparent plate glass 24 can be bonded to the meshed plate glass 21 with an adhesive strength of 14700 KPa, a sufficiently reliable observation window glass can be obtained.
[ 0032 ]
In addition, although the ultraviolet lamp with a wavelength of 365 Nm was used as an apparatus for irradiating the ultraviolet curable adhesive, for example, a high pressure mercury lamp or a metal halide lamp may be used. The emission wavelength band of the high-pressure mercury lamp is approximately 250 to 400 Nm, and the metal halide lamp can select the emission wavelength band according to the effective wavelength.
[ 0033 ]
Moreover, although the ultraviolet curable adhesive was used as the photocurable adhesive, a visible light curable adhesive may be used as another example.
Furthermore, although the transparent plate glass is bonded to the meshed plate glass as the laminated glass, it is also possible to bond tempered glass or the like as the transparent plate glass. In addition, as described above, it is also possible to attach a plate glass that can ensure visibility through the interior and the exterior, such as a plate glass coated on the surface, a plate glass colored in green, bronze, gray or the like.
In addition, although the explanation has been made by taking the observation window glass for an elevator as an example, it can be applied to other laminated glass.
[ 0034 ]
Furthermore, although the example which irradiated the ultraviolet curable adhesive agent from the downward | lower direction of the plate glass with net | network was demonstrated, the same effect can be acquired even if it irradiates from the upper direction of a transparent plate glass.
Moreover, the plate thickness t1 of the mesh plate glass 21 is 6.8 mm, the plate thickness t2 of the transparent plate glass 24 is 1.6 mm, and the thickness t3 of the ultraviolet curable adhesive 26 is 10 to 50 μm (0.01 to 0.05 mm). However, the thickness and thickness of each plate are not limited to this.
[0035]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
Claim 1 consists of a thick netted plate glass and a thin transparent plate glass. A photocurable adhesive is dropped on the center of the netted plate glass, and the transparent plate glass is placed on the photocurable adhesive. The light curable adhesive is spread thinly by its own weight, and the thickness is adjusted to 10 to 50 μm, and the two glass sheets are laminated with the light curable adhesive to form a laminated glass. The transparent plate glass is slightly smaller than the mesh plate glass, and is a sight glass that fits into the door of the elevator, and the transparent plate glass of the laminated glass is attached to the metal door of the elevator. An opening to be inserted is provided, the transparent plate glass is fitted into the opening, and the meshed plate glass of the laminated glass is disposed on the outer wall side of the opening / closing door, and the periphery of the meshed plate glass is disposed outside the peripheral portion of the opening. The total thickness of the transparent plate glass and the photo-curing adhesive that bonds the transparent plate glass to the mesh plate glass is substantially the same as the plate thickness of the door, and the inner surface of the transparent plate glass is It was almost flush with the inner wall.
In Claim 2, the photocurable adhesive set to the viscosity of 10-100 cp is dripped at the center part of the mesh plate glass in Claim 1 .
[0036]
According to claim 1 of the present invention as described above, it is composed of a thick netted plate glass and a thin transparent plate glass, and a photocurable adhesive is dropped onto the center of the netted plate glass, and the photocurable adhesive is provided. A transparent plate glass is placed on the glass plate, and the photo-curable adhesive is thinly spread by its own weight and adjusted so that its thickness is 10 to 50 μm. since the formation of the bonding and laminating glass, it is not necessary to use the intermediate layer required in the conventional case I were glass (polyvinyl butyral). For this reason, the cost of the laminated glass can be reduced. In addition, a light-curing adhesive is dropped, adjusted thinly to a thickness of 10 to 50 μm, and a transparent plate glass is placed on the light-curing adhesive and bonded together. It is not necessary to apply a high temperature and a high pressure to the transparent plate glass as in the case of the above. For this reason, the plate | board thickness of transparent plate glass can be made thin and the cost of laminated glass can be reduced.
Further, after the meshed plate glass and the transparent plate glass are bonded with a photo-curing adhesive, the meshed plate glass and the transparent plate glass can be bonded together with sufficient adhesive strength simply by curing with ultraviolet rays.
As a result, since the manufacturing process of the laminated glass can be simplified, the productivity can be increased and the cost of the laminated glass can be suppressed.
In particular, in the present invention, the total thickness of the adhesive and the transparent plate glass is set to be the same as the plate thickness of the door of the elevator, so that the transparent plate glass is flush with the door by simply placing the mesh plate glass on the door. can do.
Therefore, since it is not necessary to arrange a spacer between the meshed plate glass and the open / close door and adjust the amount of the transparent plate glass fitted, the attaching operation of the laminated glass can be simplified. As a result, the cost of the laminated glass and the installation cost of the laminated glass can be reduced.
According to the second aspect, since the photo-curing adhesive having a viscosity of 10 to 100 cp is dropped onto the central portion of the mesh plate glass, the viscosity is set to 10 cp or more in addition to the effect of the first aspect. Thus, the photocurable adhesive 26 can be spread thinly by the weight of the transparent plate glass by staying at the center of the meshed plate glass and setting the viscosity to 100 cp or less.
[Brief description of the drawings]
1 is a cross-sectional view of a laminated glass according to the present invention. FIG. 2 is a perspective view of a laminated glass according to the present invention. FIG. 3 is a flowchart illustrating a method for producing a laminated glass according to the present invention. 1st explanatory drawing of the manufacturing method of the laminated glass which concerns on this invention [FIG. 5] 2nd explanatory drawing of the manufacturing method of the laminated glass which concerns on this invention [FIG. 6] UV curable adhesion of the laminated glass which concerns on this invention FIG. 7 is a cross-sectional view of a typical conventional elevator. FIG. 8 is an enlarged view of part 8 in FIG. 7. FIG. 9 is a conventional method for producing a viewing window glass. FIG. 10 is an explanatory diagram of a conventional method for manufacturing a sight glass;
DESCRIPTION OF SYMBOLS 10 ... Elevator, 14 ... Opening / closing door, 15 ... Opening, 20 ... Laminated glass, 21 ... Net plate glass, 24 ... Transparent plate glass, 26 ... Photocurable adhesive (ultraviolet curable adhesive), 48 ... Ultraviolet lamp.

Claims (2)

It consists of a thick mesh plate glass and a thin transparent plate glass. A photocurable adhesive is dropped on the center of the mesh plate glass, and the transparent plate glass is placed on the photocurable adhesive. The photo-curing adhesive is thinly spread by its own weight and adjusted so that its thickness becomes 10 to 50 μm, and the two glass sheets are laminated with the photo- curing adhesive to constitute a laminated glass, The transparent sheet glass is slightly smaller than the meshed sheet glass, and is a sight glass that fits into the door of the elevator,
The metal door of the elevator is provided with an opening for inserting the transparent plate glass of the laminated glass, and the transparent plate glass is fitted into the opening,
Placing the meshed plate glass of the laminated glass on the outer wall side of the open / close door, attaching the periphery of the meshed plate glass to the outer wall surface of the peripheral portion of the opening via an attachment member,
The total thickness of the transparent plate glass and the photo-curing adhesive that bonds the transparent plate glass to the meshed plate glass is substantially the same as the plate thickness of the door, and the inner surface of the transparent plate glass is substantially flush with the inner wall of the door.
A laminated glass for an opening / closing door of an elevator characterized by that. The laminated glass for an elevator door according to claim 1, wherein a photo-curing adhesive having a viscosity of 10 to 100 cp is dropped onto a central portion of the meshed plate glass.

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