Method and apparatus for recovering existing tiles

Abstract

To provide a device and method for recovering existing tiles that do not require the tiles to be damaged. [Solution] The device comprises a contact portion 11 having a contact surface 111 that contacts a tile 3 located in the recovery area 21 from among a plurality of tiles 3 already installed on the installation surface 2 of a building; a shaft portion 12 having a locking portion 121 extending horizontally, with one end connected to the contact portion 11 and the other end being rod-shaped and extending in the vertical direction Z; a reaction force portion 13 having a top portion 131 at the other end, with one end positioned on the installation surface 2 or the tile 3 outside the area of ​​the recovery area 21; and a rod-shaped gripping portion 14 that locks with the locking portion 121 and the top portion 131.

Description

Technical Field

[0001] The present invention relates to a recovery device and a recovery method for existing tiles.

Background Art

[0002] In recent years, in the construction field, renovation work on historical buildings has been actively carried out. In this renovation work on historical buildings, from the viewpoints of design and the environmental load on the earth, it is required to recover the tiles of the building before renovation and reuse them for the building after renovation.

[0003] Therefore, conventionally, as disclosed in Patent Document 1 for example, a method of peeling a tile material is known, in which the center of the tile material arranged at the center of the peeling target area is perforated, and the tile material is recovered by pressing with a peeling tool inserted into the through hole.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the method of peeling the tile material of Patent Document 1, since it involves perforating the tile material arranged at the center of the peeling target area, there is a problem that it is impossible to recover the tile without causing damage.

[0006] An object of the present invention is to provide a recovery device and a recovery method for existing tiles that do not require damage to the tiles.

Means for Solving the Problems

[0007] In order to achieve the above object, the present invention provides the following means. The recovery device of the present invention comprises: a contact portion having a contact surface that contacts a tile placed in the recovery area from among a plurality of tiles already installed on the installation surface of a building; a shaft portion having a locking portion extending horizontally, with one end connected to the contact portion and the other end being rod-shaped and extending vertically; a reaction force portion having a top at the other end, with one end positioned on the installation surface or the tile outside the recovery area; and a rod-shaped gripping portion that locks with the locking portion and the top.

[0008] In the existing tile recovery device of the present invention, the connection between the contact portion and the shaft portion may be made by pin joint.

[0009] The present invention relates to a method for recovering existing tiles, which is a recovery method using a recovery device and includes: a cutting step of making cuts in the installation surface along the outer circumference of a recovery area from among a plurality of tiles already installed on the installation surface of a building; a coating step of applying adhesive to the surface of the tiles in the recovery area; a bonding step of bonding the contact surface of the recovery device, which comes into contact with the recovery area and generates a tensile force toward the peeling side, to the tiles in the recovery area via the adhesive; a peeling step of peeling the tiles in the recovery area from the installation surface by the tensile force of the recovery device; and a separation step of separating the adhesion between the tiles and the contact surface.

[0010] The present invention's method for recovering existing tiles may include a curing step before the coating step, in which the surface of the tiles located outside the recovery area is covered to prevent the adhesive from being applied.

[0011] In the method for recovering existing tiles according to the present invention, the adhesive has the property of softening or hydrolysis with increasing temperature, and the separation step may be performed by immersing the adhesive in water at 60°C or higher to separate the adhesion between the tile and the contact surface.

[0012] In the method for recovering existing tiles according to the present invention, the installation surface may be formed of mortar, and cuts approximately 5 mm deep may be formed along the outer periphery of the recovery area.

[0013] In the method for recovering existing tiles of the present invention, the recovery area may be formed to be 200 mm × 200 mm or less.

Effects of the Invention

[0014] According to the present invention, it is possible to provide a recovery device and a recovery method for existing tiles that do not require tile defects.

Brief Description of the Drawings

[0015] [Figure 1] It is a front view showing one form of the recovery device according to an embodiment of the present invention. [Figure 2] It is a front view showing another form of the recovery device according to an embodiment of the present invention. [Figure 3] It is a perspective view showing the cutting step of the recovery method according to an embodiment of the present invention. [Figure 4] It is a perspective view showing the curing step of the recovery method according to an embodiment of the present invention. [Figure 5] It is a perspective view showing the coating step of the recovery method according to an embodiment of the present invention. [Figure 6] It is a perspective view showing the bonding step of the recovery method according to an embodiment of the present invention. [Figure 7] It is a perspective view showing the peeling step of the recovery method according to an embodiment of the present invention. [Figure 8] It is a perspective view showing the state before separation in the separation step of the recovery method according to an embodiment of the present invention. [Figure 9] It is a perspective view showing the state after separation in the separation step of the recovery method according to an embodiment of the present invention. [Figure 10] It is a flowchart of the recovery method according to an embodiment of the present invention. [Figure 11] It is a diagram showing the dipping time, dipping temperature, and state of the adhesive according to an embodiment of the present invention. [Figure 12] It is a diagram showing the adhesive strength of the adhesive according to an embodiment of the present invention. [Figure 13]It is a diagram showing the curing time required until a predetermined adhesive force of the adhesive according to an embodiment of the present invention is exhibited.

Mode for Carrying Out the Invention

[0016] The recovery device 1 and the recovery method of the existing tile 3 according to the embodiment of the present invention will be described with reference to FIGS. 1-13. The drawings appropriately show the X-axis, Y-axis, and Z-axis. The direction along the Z-axis is the vertical direction. The direction along the X-axis is one of the horizontal directions orthogonal to the vertical direction. The direction along the Y-axis is the direction orthogonal to the X-axis among the horizontal directions orthogonal to the vertical direction. In the following description, the direction along the X-axis is referred to as the "left-right direction X", the direction along the Y-axis is referred to as the "front-back direction Y", and the direction along the Z-axis is referred to as the "vertical direction Z". The side to which the arrow of the Z-axis points in the vertical direction Z is defined as the "peeling side" (+Z side). The side opposite to the side to which the arrow of the Z-axis points in the vertical direction Z is defined as the "adhesive side" (-Z side). The side to which the arrow of the X-axis points in the left-right direction X is the right side (+X side), and the side opposite to the side to which the arrow of the X-axis points in the left-right direction X is the left side (-X side). The side to which the arrow of the Y-axis points in the front-back direction Y is the rear side (+Y side), and the side opposite to the side to which the arrow of the Y-axis points in the front-back direction Y is the front side (-Y side).

[0017] FIG. 3 shows the tile 3 existing on the installation surface 2 of the building. The installation surface 2 is a floor surface facing the vertical direction Z constructed of a finishing base material of a building, and a plurality of tiles 3 are arranged on the finishing surface. This installation surface 2 is constructed of mortar. The tile 3 is in the form of a ceramic plate and is arranged so as to face the vertical direction Z. This tile 3 is a tile having a rectangular shape defined by JIS standards and is formed in a size of 100 squares (94 mm × 94 mm). Further, the recovery area 21 is an area where the tile 3 is peeled off in one cycle in the recovery method of the embodiment, and is formed in a rectangle of approximately 200 mm × 200 mm. This recovery area 21 is set in an area slightly larger than a rectangle constructed of four tiles 3. Here, tiles 3 placed within the collection area 21 are defined as collection tiles 31. Tiles 3 placed outside the collection area 21 are defined as uncollected tiles 32.

[0018] The orientation and position of the installation surface 2 and tile 3 are not particularly limited. For example, the installation surface 2 and tile 3 may be the walls of a building facing left-right X or front-back Y. In that case, the side perpendicular to the installation surface 2 and where tile 3 is collected is defined as the peeling side, and the opposite side of the peeling side is defined as the adhesive side. Furthermore, the installation surface 2 and tile 3 may be demolition materials or waste materials after a building has been dismantled.

[0019] <Recovery device> The recovery device 1 is a device that generates a tensile force 145 toward the peeling side (+Z side) at the contact portion 11. Figure 1 shows the recovery device 1 for existing tiles 3 according to this embodiment. As shown in Figure 1, the recovery device 1 comprises a contact portion 11, a shaft portion 12, a reaction force portion 13, and a gripping portion 14.

[0020] The contact portion 11 is a plate-shaped part and is positioned to face the vertical direction Z. This contact portion 11 is, for example, a general-purpose member made of steel. The surface of the contact portion 11 is formed to be substantially the same shape as the recovery area 21. The contact portion 11 has a contact surface 111 that comes into contact with the recovery tile 31. This contact surface 111 is the adhesive side (-Z side) of the contact portion 11. In the center of the peeling side (+Z side) surface of the contact portion 11, a cylindrical connecting hole 112 is formed that extends toward the peeling side (+Z side). This connecting hole 112 has a fastening portion 113 on its side and is provided so that a fastener can be inserted through it.

[0021] The material and structure of the contact portion 11 are not particularly limited, as long as they can be bonded with the adhesive 4 and can withstand the tensile force 145.

[0022] The shaft portion 12 is a rod-shaped part, with one end connected to the contact portion 11 via the fastening portion 113 of the connecting hole 112, and the other end extending toward the peeling side (+Z side). This shaft portion 12 is, for example, a general-purpose member made of steel. The shaft portion 12 also has a plurality of locking portions 121 extending horizontally in the middle portion. These locking portions 121 are, for example, bolts fastened to the shaft portion 12.

[0023] The material and structure of the shaft portion 12 are not particularly limited, as long as it is equipped with a locking portion 121 and can withstand a tensile force of 145. The connection between the contact portion 11 and the shaft portion 12 may be made by pin joining via a fastener inserted through the fastening portion 113. In that case, the contact portion 11 and the shaft portion 12 are provided to be rotatable in the plane of the vertical direction Z. Therefore, the external force 144 does not have to be applied parallel to the vertical direction Z.

[0024] The reaction force portion 13 is a block-shaped part that is independent of the contact portion 11 and the shaft portion 12. The reaction force portion 13 has a bottom portion 132 formed at one end that is positioned on the installation surface 2, and a top portion 131 formed at the other end. The height of the top portion 131 is lower than the locking portion 121 of the shaft portion 12. This reaction force portion 13 is made of a general-purpose material, such as rubber.

[0025] The material and configuration of the reaction force portion 13 are not particularly limited, as long as it is equipped with a locking portion 121 and can withstand the external force 144 applied to the gripping portion 14. Furthermore, the position and shape of the reaction force portion 13 are not limited as long as the top portion 131 can come into contact with the gripping portion 14. Furthermore, the bottom portion 132 of the reaction portion 13 may be placed on the installation surface 2, or it may be placed on the uncollected tile 32.

[0026] The gripping portion 14 is a rod-shaped part that is independent of the contact portion 11 and the shaft portion 12. This gripping portion 14 is, for example, a general-purpose member made of steel. The gripping portion 14 has an intermediate portion 141, a contact end portion 142, and an input end portion 143. The intermediate portion 141 and the contact end portion 142 of the gripping portion 14 are provided to engage with two locations: the locking portion 121 of the shaft portion 12 and the top portion 131 of the reaction force portion 13. The input end portion 143 is the part to which an external force 144 is applied by the operator of the retrieval device 1.

[0027] The material and structure of the gripping portion 14 are not particularly limited, as long as it can accept external force 144 and can engage with the locking portion 121 and the top portion 131. The gripping portion 14 may also be pin-connected to the shaft portion 12. In that case, the gripping portion 14 will not detach from the shaft portion 12, making it easier to operate. Furthermore, the gripping portion 14 may be locked to any of the multiple locking portions 121 of the shaft portion 12. For example, if the operator applying the external force 144 is tall, the gripping portion 14 may be locked by contacting the lower part of a locking portion 121 located at a higher position, thereby generating a tensile force 145. In this way, the retrieval device 1 is provided to offer a working posture that suits the operator.

[0028] In the recovery device 1 shown in Figure 1, the input end 143 is positioned on the right side (+X side), and an external force 144 is generated toward the peeling side (+Z side). In this state, the reaction force part 13 is positioned to the left of the contact part 11 (-X side). Here, the intermediate part 141 is locked by contacting the lower part of the locking part 121, and the contact end 142 is locked by contacting the top part 131. Then, as a reaction force accompanying the locking of the external force 144, a tensile force 145 toward the peeling side (+Z side) is generated in the shaft part 12 and the contact part 11.

[0029] The recovery device 1 shown in Figure 1 is constructed from readily available general-purpose components, but the materials and configuration are not particularly limited. For example, at least one or more components may be integrally formed.

[0030] Figure 2 shows another form of the existing tile recovery device 1 according to this embodiment. The other form of the recovery device 1 shown in Figure 2 includes the same contact portion 11, shaft portion 12, and gripping portion 14 as the recovery device 1 shown in Figure 1, as well as a reaction portion 13 with different dimensions and shape.

[0031] In other forms of the recovery device 1, the reaction force section 13 is a block-shaped portion that is independent of the contact section 11 and the shaft section 12. The reaction force section 13 has a bottom section 132 formed at one end that is placed on the installation surface 2, and a top section 131 formed at the other end. The height of the top section 131 is higher than the locking section 121 of the shaft section 12. This reaction force section 13 is made of a general-purpose material, such as rubber.

[0032] The material and configuration of the reaction force portion 13 are not particularly limited, as long as it is equipped with a locking portion 121 and can withstand the external force 144 applied to the gripping portion 14. Furthermore, the position and shape of the reaction force portion 13 are not limited as long as the top portion 131 can come into contact with the gripping portion 14. Furthermore, the bottom portion 132 of the reaction portion 13 may be placed on the installation surface 2, or it may be placed on the uncollected tile 32.

[0033] In the recovery device 1 shown in Figure 2, the input end 143 is positioned on the right side (+X side), and an external force 144 is generated toward the adhesive side (-Z side). In this state, the reaction force portion 13 is positioned to the right (+X side) of the contact portion 11. Here, the contact end 142 is locked by contacting the lower part of the locking portion 121, and the intermediate portion 141 is locked by contacting the top portion 131. Then, as a reaction force accompanying the locking of the external force 144, a tensile force 145 toward the peeling side (+Z side) is generated in the shaft portion 12 and the contact portion 11.

[0034] The recovery device 1 shown in Figure 2 is constructed from readily available general-purpose components, but the materials and configuration are not particularly limited. For example, at least one or more components may be integrally formed.

[0035] The above demonstrates that the recovery device 1 according to the embodiment generates a tensile force 145 on the peeling side (+Z side). The method for recovering existing tiles 3 using this recovery device 1 is shown in the following cutting step S1 - separation step S6.

[0036] <Cutting process> The cutting process S1 is a process of making cuts 22 around the outer perimeter of the recovery area 21 on the installation surface 2 of the building. Figure 3 shows the cutting process S1 in the method for recovering existing tiles 3 according to this embodiment. Here, the surface of the existing tiles 3 is defined as being cleaned and dry. In cutting step S1, a cutting device (not shown, for example, a joint cutter) is used to create a cut 22 with a depth of approximately 5 mm in the installation surface 2 along the outer circumference of the recovery area 21.

[0037] The material and structure of the mounting surface 2 are not particularly limited, as long as it can be peeled off while the cuts 22 and tensile force 145 are generated. For example, it may be constructed of adhesive material for tiles 3. Furthermore, the material and composition of the tile 3 are not particularly limited as long as they can be bonded with the adhesive 4. For example, it may be a circular porcelain tile 3. Furthermore, the cutting device and the type and configuration of the cuts are not particularly limited, as long as they can generate cuts of about 5 mm. For example, the tiles 3 may be cut together with a concrete cutter. In this case, by cutting the tiles 3 without any damage, they can be rejoined and reused after collection.

[0038] <Curing process> Curing step S2 is a step in which the surface of the unrecovered tiles 32 is covered, and is the step following the cutting step S1. Figure 4 shows the curing step S2 in the method for recovering existing tiles 3 according to this embodiment. A protective material 23 is placed on the surface of the unrecovered tiles 32. This protective material 23 is a removable temporary material, such as masking tape.

[0039] The material and composition of the protective material 23 are not particularly limited as long as they can cover the unrecovered tiles 32. For example, a wide area of ​​unrecovered tiles 32 may be protected with a vinyl sheet, or only the unrecovered tiles 32 adjacent to the recovery area may be protected with protective tape.

[0040] <Coating process> The coating step S3 is a step in which adhesive 4 is applied to the surface of the recovered tile 31, and is the step following the curing step S2. Figure 5 shows the coating step S3 in the method for recovering existing tiles 3 according to this embodiment. Adhesive 4 is a two-component epoxy resin and is a bonding material that can be applied to metal materials as well. Adhesive 4 has a viscosity that does not penetrate the surface of the recovered tile 31. Adhesive 4 also has the property of curing in about 3 hours at room temperature and softening when immersed in water at 60°C or higher. The surface of the recovered tile 31 is coated with adhesive 4 using an application tool such as a brush. At this time, the surface of the unrecovered tile 32 is covered with curing material 23, so adhesive 4 is not applied to it.

[0041] The material and composition of the adhesive 4 are not particularly limited, as long as it has an adhesive strength higher than the bonding strength between the installation surface 2 and the recovered tile 31, and can be removed by immersion or heating. For example, a rubber-based adhesive 4 may have properties that soften by hydrolysis and heating. Furthermore, the curing time, heating temperature, and immersion time are set to optimal values ​​depending on the properties of the adhesive 4. Furthermore, the adhesive 4 may be applied only to a portion of the surface of the recovered tile 31, provided that sufficient adhesive strength is ensured.

[0042] <Adhesion process> The bonding step S4 is a step in which the surface of the recovered tile 31 and the contact surface 111 of the recovery device 1 are bonded together via adhesive 4, and is the step following the coating step S3. Figure 6 shows the bonding step S4 in the recovery method of existing tiles 3 according to this embodiment. The contact surface 111, which is the adhesive side (-Z side) of the contact portion 11 of the recovery device 1, is positioned to face the recovery area 21 and to contact the uncured adhesive 4 applied to the surface of the recovery tile 31. Here, the contact surface 111 is held in contact with the surface of the recovery tile 31 until the adhesive 4 has finished curing. Once the adhesive 4 has finished curing, the contact surface 111 is bonded to the surface of the recovery tile 31 via the cured adhesive 4.

[0043] The adhesive 4 may also be applied to the contact surface 111. In that case, the application step S3 involves applying the adhesive 4 to the contact surface 111 before it comes into contact with the recovered tile 31, and the adhesive 4 will not be applied to the surface of the unrecovered tile 32. Therefore, the curing step S2 may not be performed.

[0044] <Peeling process> The peeling step S5 is a step in which the recovered tile 31 is peeled off the installation surface 2 by the tensile force 145 of the recovery device 1, and is the step following the bonding step S4. Figure 7 shows the peeling step S5 in the recovery method for existing tiles 3 according to this embodiment. The recovery device 1 generates a tensile force 145 toward the peeling side (+Z side) when the contact surface 111 and the surface of the recovered tile 31 are in a bonded state. Here, since the adhesive 4 has a higher adhesive strength than the tensile force 145, the bond between the contact surface 111 and the surface of the recovered tile 31 is not separated by the tensile force 145. On the other hand, the installation surface 2 within the recovery area 21 has cuts 22 along the outer circumference of the recovery area 21, so stress concentration occurs at the cuts 22 due to the tensile force 145, causing it to break and peel off. The part of the installation surface 2 that has peeled off along these cuts 22 is defined as the peeling substrate 24. Therefore, the tensile force 145 of the recovery device 1 causes the recovery tile 31 within the recovery area 21 to be peeled off from the installation surface 2 without being damaged. The adhesive side (-Z side) of this recovery tile 31 is bonded to the peeling substrate 24.

[0045] The configuration of the recovery device 1 is not particularly limited as long as it can generate a tensile force 145 on the contact surface 111 that is higher than the bonding force between the installation surface 2 and the recovery tile 31, and does not have to be the recovery device 1 shown in Figure 1 or Figure 2. For example, the configuration may generate the tensile force 145 using a lifting device such as a chain block connected to the contact portion 11. Furthermore, the peeling method does not necessarily have to involve the fracture of the installation surface 2, and the recovered tile 31 and the peeling base 24 do not need to be joined. For example, if the installation surface 2 is constructed of mortar and the recovered tile 31 is made of ceramic, the peeling process S5 may be performed after dissolving or softening the installation surface 2 using an acidic solvent. In this case, the recovery device 1 recovers only the recovered tile 31 without fracturing the installation surface 2.

[0046] <Separation process> The separation step S6 is a step in which the adhesion between the contact surface 111 and the surface of the recovered tile 31 is separated, and is the step following the peeling step S5. Figure 8-9 shows the separation step S6 in the recovery method of the existing tile 3 according to this embodiment. As shown in Figure 8, after the peeling process S5, the recovered tile 31, which is bonded to the peeling base 24, is adhered to the contact surface 111 of the contact portion 11 of the recovery device 1. Here, the recovery device 1 immerses the contact portion 11 in the immersion liquid 5, which is filled with water inside the immersion container 51. This immersion container 51 is, for example, a steel container that can be filled with a high-temperature liquid and has an opening that can accommodate the contact portion 11. The immersion liquid 5 is water heated to 60°C or higher. The adhesive 4 immersed in the immersion liquid 5 softens over time, and its adhesive strength decreases. As shown in Figure 9, after a certain amount of time has elapsed since the start of immersion in the immersion liquid 5, the adhesive strength of the adhesive 4 becomes such that it can be peeled off manually and is removed. With the peeling off of the adhesive 4, the contact surface 111 and the surface of the recovered tile 31 separate, and the recovery of the recovered tile 31 is completed.

[0047] The four recovered tiles 31 are joined together via a delamination base 24, but they may be reused in the renovated building, etc., while still joined together, or they may be separated after recovery and reused one by one. Furthermore, the recovered tiles 31 may be reused in the renovated building, etc., while still joined together with the delamination base 24, or they may be reused after the delamination base 24 has been removed by dissolution treatment, polishing treatment, etc. Furthermore, the material and composition of the immersion container 51 and the immersion liquid 5 are not particularly limited as long as they can raise the temperature of the adhesive 4.

[0048] The above demonstrates that the recovery method according to this embodiment allows for the recovery of tile 3 without any damage.

[0049] <Collection method flow> Figure 10 is a flowchart relating to the recovery method of the embodiment. In the initial procedure S11, the work plan for the existing tile 3 is finalized, and the work begins. At this stage, the materials of the installation surface 2 and the tile 3 are investigated. For the installation surface 2, a tensile strength test is conducted on a small area to investigate its strength. In addition, for the adhesive 4, an adhesion strength test is conducted with the tile 3 to investigate its adhesive strength. Next, we proceed to selection procedure S12.

[0050] In the selection procedure S12, the adhesive 4 is selected and the curing time is set based on the work plan and investigation results confirmed in the starting procedure S11. By selecting an adhesive 4 with a short curing time until adhesive strength is achieved, the bonding process S4 can be made more efficient. Furthermore, by selecting an adhesive 4 with a short immersion time until it becomes peelable, the separation process S6 can be made more efficient. Next, we proceed to partitioning procedure S13.

[0051] In the partitioning procedure S13, the recovery area 21 is set based on the work plan confirmed in the starting procedure S11, and the cutting process S1 and curing process S2 are executed. Here, the recovery rate of the tiles 3 can be improved by setting the recovery area 21 along the joints of the tiles 3. Next, we proceed to bonding procedure S14.

[0052] In bonding procedure S14, the adhesive 4 selected in selection procedure S12 is used to perform the application process S3 and bonding process S4. If adhesive 4 adheres to the uncollected tiles 32, it is removed with a spatula or the like. Next, we proceed to the peeling procedure S15.

[0053] In the peeling procedure S15, the contact surface 111 of the recovery device 1 and the surface of the recovery tile 31 are held in contact via the adhesive 4, based on the curing time of the adhesive 4 selected in the selection procedure S12. Here, the curing time is adjusted according to the measurement results of the ambient temperature. After curing is complete, the peeling process S5 is executed. Next, we proceed to the separation procedure S16.

[0054] In the separation procedure S16, the immersion time in the immersion liquid 5 is set based on the characteristics of the adhesive 4 selected in the selection procedure S12, and the separation process S6 is executed. After separation, the contact surface 111 and the recovered tile 31 are cleaned. If there are any uncollected tiles 32 at this point, the process can be repeated by returning to partitioning procedure S13. Once all tile 3 has been collected, proceed to termination procedure S17 and end the process.

[0055] The contact portion 11 and the shaft portion 12 of the recovery device 1 may be detachably provided. Furthermore, the recovery device 1 may include a spare contact portion 11. In this case, after the peeling procedure S15 is completed, the contact portion 11 bonded to the recovery tile 31 is removed from the recovery device 1, and a spare contact portion 11 not bonded to the recovery tile 31 is connected. At this point, the removed contact portion undergoes the separation procedure S16, allowing the recovery device 1 to perform the bonding procedure S14 for the next recovery area 21. Thus, the work is made more efficient by performing multiple procedures in parallel.

[0056] <Properties of adhesives> Figure 11 shows the immersion time, immersion temperature, and state of the adhesive 4 according to the embodiment. In the case of adhesive 4 requiring a curing time of 5 minutes (5-minute curing type), separation is not sufficient when the temperature of the immersion liquid 5 is 40°C, separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 60°C, and suitable separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 80°C. Similarly, in the case of adhesive 4 requiring a curing time of 30 minutes (30-minute curing type), separation is not sufficient when the temperature of the immersion liquid 5 is 40°C, separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 60°C, and suitable separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 80°C. Therefore, in the separation step S6, it is preferable to set the temperature of the immersion liquid 5 to 60°C or higher and immerse for 3 minutes or more.

[0057] Figure 12 shows the adhesive strength of the adhesive 4 according to the embodiment. Under all conditions shown in Figure 12, the adhesive strength was 1.5 N / mm². 2 The above illustrates the above. On the other hand, the strength of the base material for a typical mounting surface 2 is 1.0-1.5 N / mm². 2 Given the degree of curing time, it can be seen that both the 5-minute curing adhesive 4 and the 30-minute curing adhesive 4 are applicable.

[0058] The strength of the substrate material on the installation surface 2 and the adhesive strength of the adhesive 4 are not particularly limited, as long as the tile 3 is removable. For example, if the strength of the substrate material on the installation surface 2 is 1.5 N / mm² 2 The above is also acceptable. In that case, by referring to the results of the tensile strength test and adhesive strength test in the starting procedure S11, the adhesive 4 can be selected and the curing time set so that it has an adhesive strength greater than or equal to the strength of the substrate material.

[0059] Figure 13 shows the curing time required for the adhesive 4 according to the embodiment to achieve a predetermined adhesive strength. As shown in Figure 13, 3 N / mm 2The curing time to reach the specified time is the same for both the 5-minute curing adhesive 4 and the 30-minute curing adhesive 4. On the other hand, the minimum fixing time is significantly shorter for the 5-minute curing adhesive 4. Therefore, when bonding to recovery tiles 31 placed on a wall or the like that cannot be held by the weight of the recovery device 1, the use of the 5-minute curing adhesive 4, which can bond in a short time, is recommended. Furthermore, the curing time for both the 5-minute curing adhesive 4 and the 30-minute curing adhesive 4 increases significantly as the ambient temperature decreases. Therefore, when the ambient temperature is low, the work can be carried out efficiently by using a heating device such as a heater.

[0060] As described above, the existing tile recovery device 1 according to this embodiment includes a contact portion 11, a shaft portion 12, a reaction force portion 13, and a gripping portion 14. The contact portion 11 is a plate-shaped portion and is arranged to face the vertical direction Z. The surface of the contact portion 11 is formed to be substantially the same shape as the recovery area 21. The contact portion 11 has a contact surface 111 that contacts the recovery tile 31. Furthermore, the shaft portion 12 is a rod-shaped portion, with one end connected to the contact portion 11 via a fastening portion 113 of a connection hole 112, and the other end extending toward the peeling side (+Z side). The shaft portion 12 also has a plurality of locking portions 121 extending horizontally in the middle portion. Furthermore, the reaction force portion 13 is a block-shaped portion and is independent of the contact portion 11 and the shaft portion 12. The reaction force portion 13 has a bottom portion 132 formed at one end that is positioned on the installation surface 2, and a top portion 131 formed at the other end. The gripping portion 14 has an intermediate portion 141, a contact end portion 142, and an input end portion 143. The intermediate portion 141 and the contact end portion 142 of the gripping portion 14 are provided to engage with the locking portion 121 of the shaft portion 12 and the top portion 131 of the reaction force portion 13 at two locations. Therefore, the recovery device 1 can generate a tensile force 145 without requiring any damage to the tiles 3. Thus, the recovery device 1 improves the recovery rate of existing tiles 3, contributing to a reduction in environmental impact and the protection of historical buildings. Furthermore, since the recovery device 1 can be constructed using general-purpose components, it is easy to introduce and operate, and can be used efficiently.

[0061] In the existing tile recovery device 1 according to this embodiment, a cylindrical connection hole 112 extending toward the peeling side (+Z side) is formed in the center of the peeling side (+Z side) of the contact portion 11. This connection hole 112 has a fastening portion 113 on its side surface, and a fastener is provided to be inserted through it. The connection between the contact portion 11 and the shaft portion 12 may be made by pin joining via a fastener inserted through the fastening portion 113. In that case, the contact portion 11 and the shaft portion 12 are provided to be rotatable in the plane of the vertical direction Z. Therefore, the external force 144 does not have to be applied parallel to the vertical direction Z. Therefore, the recovery device 1 can be applied even when the installation surface 2 is sloped or in a narrow space. Thus, the recovery device 1 improves the recovery rate of existing tiles 3 in the recovery work of existing tiles 3 in various environments, contributing to the reduction of environmental burden, and is also easy to operate and can be used in a suitable manner.

[0062] In the method for recovering existing tiles 3 according to this embodiment, the cutting step S1 is a step of making cuts 22 around the outer periphery of the recovery area 21 on the installation surface 2 of the building. The coating step S3 is a step of applying adhesive 4 to the surface of the recovered tile 31, and is the step following the curing step S2. The bonding step S4 is a step of bonding the surface of the recovered tile 31 and the contact surface 111 of the recovery device 1 via adhesive 4, and is the step following the coating step S3. The peeling step S5 is a step of peeling the recovered tile 31 from the installation surface 2 by the tensile force 145 of the recovery device 1, and is the step following the bonding step S4. The separation step S6 is a step of separating the adhesion between the contact surface 111 and the surface of the recovered tile 31, and is the step following the peeling step S5. Therefore, the recovery method allows for the recovery of tiles 3 from the installation surface 2 of the building without requiring any damage to the tiles 3. Thus, the recovery method improves the recovery rate of existing tiles 3, contributing to a reduction in environmental impact and the protection of historical buildings.

[0063] In the method for recovering existing tiles 3 according to this embodiment, the curing step S2 is a step of covering the surface of the unrecovered tiles 32, and is the step following the cutting step S1. A curing material 23 is placed on the surface of the unrecovered tiles 32. This curing material 23 is a removable temporary material, such as masking tape. The surface of the recovered tiles 31 is coated with adhesive 4 over its entire surface using an application tool such as a brush. At this time, the surface of the unrecovered tiles 32 is covered with curing material 23, so adhesive 4 is not applied to it. Therefore, the recovery method can be applied to the recovery of a wide range of tiles 3 because it prevents the accumulation of hardened adhesive 4 on the surface of the tile 3 and ensures the adhesive strength between the contact surface 111 and the recovered tile 31. Thus, the recovery method improves the recovery rate of existing tiles 3, contributes to reducing environmental impact, and allows for the efficient execution of recovery work.

[0064] In the method for recovering existing tiles 3 according to this embodiment, the adhesive 4 is made of a two-component epoxy resin and is a bonding material that can also be applied to metal materials. This adhesive 4 has a viscosity such that it does not penetrate the surface of the recovered tile 31. Furthermore, the adhesive 4 has the property of hardening in about 3 hours at room temperature and softening when immersed in water at 60°C or higher. After the peeling process S5, the recovered tile 31, which is bonded to the peeling base 24, is adhered to the contact surface 111 of the contact part 11 of the recovery device 1. Here, the recovery device 1 immerses the contact part 11 in the immersion liquid 5 which is filled with water inside the immersion container 51. This immersion container 51 is a steel container that can be filled with high-temperature liquid and has an opening that can accommodate the contact part 11. Furthermore, the immersion liquid 5 is water heated to 60°C or higher. The adhesive 4 immersed in the immersion liquid 5 softens over time and its adhesive strength decreases. After a certain period of time has elapsed since the start of immersion in the immersion liquid 5, the adhesive 4 becomes strong enough to be peeled off by hand and is removed. In the case of adhesive 4 that requires a curing time of 5 minutes (5-minute curing type), separation is not sufficient when the temperature of the immersion liquid 5 is 40°C, separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 60°C, and suitable separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 80°C. Similarly, in the case of adhesive 4 that requires a curing time of 30 minutes (30-minute curing type), separation is not sufficient when the temperature of the immersion liquid 5 is 40°C, separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 60°C, and suitable separation is achieved by immersion for 3 minutes or more when the temperature of the immersion liquid 5 is 80°C. Therefore, in the separation step S6, it is preferable to set the temperature of the immersion liquid 5 to 60°C or higher and immerse for 3 minutes or more. Therefore, the recovery method allows for easy separation by setting the temperature of the immersion liquid 5 to 60°C or higher and immersing for 3 minutes or more. Thus, the recovery method more effectively improves the recovery rate of existing tiles 3, contributing to a reduction in environmental impact, and allows for efficient execution of the recovery work.

[0065] In the method for recovering existing tiles 3 according to this embodiment, the installation surface 2 is a surface facing the vertical direction Z, constructed from a base material for finishing the building, and multiple tiles 3 are arranged on the finished surface. This installation surface 2 is constructed of mortar. The tiles 3 are ceramic plates and are arranged to face the vertical direction Z. In the cutting process S1, a cutting device (not shown, for example, a joint cutter) is used to create a cut 22 with a depth of approximately 5 mm in the installation surface 2 along the outer circumference of the recovery area 21. Then, because the installation surface 2 within the recovery area 21 has a cut 22 along the outer circumference of the recovery area 21, stress concentration occurs in the cut 22 due to the tensile force 145, causing it to break and peel off. Therefore, the recovery method allows for the effective removal of the recovered tiles 31 by having a cut 22 on the installation surface 2 with a depth of approximately 5 mm. Thus, the recovery method more effectively improves the recovery rate of existing tiles 3, contributing to a reduction in environmental burden, and allows for the efficient execution of the recovery work.

[0066] In the method for recovering existing tiles 3 according to this embodiment, the recovery area 21 is the area in which the tiles 3 are peeled off in one cycle of the recovery method of this embodiment, and is formed as a rectangle of approximately 200 mm × 200 mm. This recovery area 21 is set to be slightly larger than the rectangle constructed by the four tiles 3. Therefore, the recovery method allows for the recovery of four tiles 3 in one cycle without any loss. Thus, the recovery method preferably improves the recovery rate of existing tiles 3, contributing to a reduction in environmental impact, and allows for the efficient execution of recovery work.

[0067] The embodiments of the existing tile recovery device 1 and recovery method according to the present invention have been described above, but the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the invention.

[0068] In the present invention, the separation step S6 may be performed by raising the temperature of the adhesive 4 without immersion using a heating device such as an oven or heater. For example, the contact portion 11 of the recovery device 1 may be equipped with a heating device that raises the temperature of the contact surface 111. In that case, the heating device may be set to approximately 60°C to peel off the adhesive 4, and also set to approximately 30°C to accelerate the curing of the adhesive 4.

[0069] In the present invention, the external force 144 input to the recovery device 1 may be input by a device similar to a cylinder. For example, the recovery device 1 may be equipped with an electric cylinder located outside the recovery area 21 and protruding toward the peeling side (+Z side). In that case, the recovery device 1 operates the electric cylinder when the contact surface 111 and the recovery tile 31 are in adhesion. The electric cylinder comes into contact with the locking portion 121 of the shaft portion 12 during its protruding motion, generating a tensile force 145 toward the peeling side (+Z side) in the recovery device 1. This tensile force 145 allows the peeling process S5 to be executed. [Explanation of Symbols]

[0070] 1. Recovery device 3 tiles 4. Adhesive 11 Contact part 12 Shaft section 13 Reaction part 14 Gripping part 21 Recovery Area 22 cuts 111 Contact surface 121 Locking part 131 Top 145 Tensile force S1 Cutting process S2 curing process S3 Coating process S4 Adhesion process S5 Peeling process S6 Separation process Z vertical direction

Claims

1. Among the multiple tiles already installed on the installation surface of the building, a contact portion having a contact surface that comes into contact with the tile placed in the recovery area, A shaft portion having a locking portion extending horizontally, with one end connected to the contact portion and the other end being rod-shaped and extending vertically, A reaction force portion having a top at one end, which is positioned on the installation surface or the tile outside the area of ​​the recovery region, It comprises the aforementioned locking portion and a rod-shaped gripping portion that locks at the top. A device for collecting existing tiles.

2. The connection between the contact portion and the shaft portion is a pin joint. The existing tile recovery device according to claim 1.

3. A recovery method using the recovery device described in claim 1 or 2, A cutting process involves making cuts in the installation surface of multiple tiles already installed on the installation surface of a building, along the outer perimeter of the recovery area. A coating step of applying adhesive to the surface of the tiles in the recovery area, A bonding step is performed by bonding the contact surface of the recovery device, which comes into contact with the recovery area and generates a tensile force toward the peeling side, and the tile of the recovery area via the adhesive. A peeling step in which the tiles in the recovery area are peeled off from the installation surface by the tensile force of the recovery device, The process includes a separation step for separating the adhesion between the tile and the contact surface. Method for removing existing tiles.

4. The process includes a curing step, in which, prior to the coating step, a coating is applied to the surface of the tiles located outside the area of ​​the recovery region to prevent the adhesive from being applied. The method for recovering existing tiles according to claim 3.

5. The aforementioned adhesive has the property of softening or hydrolysis as the temperature rises. The separation step involves separating the adhesion between the tile and the contact surface by immersing the adhesive in water at 60°C or higher. The method for recovering existing tiles according to claim 3.

6. The aforementioned mounting surface is Formed from mortar, A cut approximately 5 mm deep is formed along the outer circumference of the aforementioned recovery area. The method for recovering existing tiles according to claim 3.

7. The aforementioned collection area is formed to be 200 mm x 200 mm or less. The method for recovering existing tiles according to claim 3.

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