Catch pan and curtain wall

Abstract

To provide a catch pan that can reduce the number of pieces used when installing curtain walls and improve leakage prevention performance while reducing incidence of construction defects such as pressure variation and pressure failure.SOLUTION: A catch pan 22 comprises: a catch pan body 22A having elasticity with which butt ends T of a plurality of panel units 10a arranged side by side in vertical and horizontal directions contact each other; a flow channel 24 formed in the catch pan body 22A to catch rainwater that can flow along a vertical frame portion 14 of the panel unit 10a so as to flow the rainwater to the outdoor side of the panel unit 10a; a backflow prevention portion 26 provided in a portion of the flow channel 24; a drainage hole 28 that communicates with the flow channel 24 and drains rainwater to the outdoor side; and a draining portion 30 having a downward slope on the outdoor side that is located below the drainage hole 28 and absorbs falling energy of the rainwater drained through the drainage hole 28.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] Embodiments of the present invention relate to a catch pan and a curtain wall.

Background Art

[0002] Curtain walls that make up the outer walls of buildings are widely used. A curtain wall is composed of a combination of a plurality of panel units. The panel units are finished at a factory or the like and transported to the construction site. Then, the individual panel units are arranged side by side in the vertical and horizontal directions while being attached to the building frame by fasteners (mounting brackets) to complete the outer wall. By the way, a leak prevention structure for preventing water from entering the inside of the frame is required at the joint portion of each panel unit that constitutes the curtain wall exposed to rain, and various structures have been proposed (for example, Patent Document 1). As a leak prevention structure, for example, a part called a catch pan that receives water entering from the joint portion of the panel unit and discharges it to the outside may be attached to the frame of the panel unit to prevent leakage.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As described above, in a water leak prevention structure using catch pans, catch pans are attached to the corners of the frame of each panel unit, and adjacent catch pans are compressed to ensure watertightness. However, because catch pans need to be attached to the corners of the frame of each panel unit, the number of catch pans used increases, and the construction work increases. Furthermore, as the number of catch pans used increases, the rate of construction defects due to variations in or insufficient pressure during installation increases.

[0005] The present invention has been made in view of the above, and one of its objectives is to provide a catch pan and a curtain wall using the catch pan that can reduce the number of points (units) used during construction, reduce the occurrence rate of construction defects such as pressure variations and poor pressure, and improve water leakage prevention performance. [Means for solving the problem]

[0006] To solve the above-mentioned problems and achieve the objective, the catch pan according to an embodiment of the present invention comprises: an elastic catch pan body portion to which the abutting ends of a plurality of panel units arranged in a vertical and horizontal direction come into contact; a flow path formed in the catch pan body portion to receive rainwater that can flow along the vertical frame portion of the panel unit and to drain it to the outdoor side of the panel unit; a backflow prevention portion provided in a part of the flow path; a drainage hole communicating with the flow path and discharging the rainwater to the outdoor side; and a water drainage portion positioned below the drainage hole and having a downward slope portion on the outdoor side to absorb the falling energy of the rainwater discharged from the drainage hole.

[0007] Furthermore, the drainage holes in this embodiment may be provided in pairs, for example, on either side of the vertical frame, opening toward the outside.

[0008] Furthermore, the drainage holes in this embodiment may be provided in pairs, for example, on either side of the vertical frame, and opened along the extending direction of the horizontal frame of the panel unit.

[0009] Furthermore, the drainage portion in this embodiment may be connected, for example, to a horizontal frame drainage portion formed on the horizontal frame portion of the panel unit in the direction of extension of the horizontal frame portion.

[0010] Furthermore, the curtain wall of this embodiment may also be equipped with, for example, the catch pan described above. [Effects of the Invention]

[0011] According to the configuration of the embodiment of the present invention, the catch pan body is configured as an integrated member to which the abutting ends of multiple panel units arranged in a vertical and horizontal direction come into contact. Furthermore, rainwater that may flow along the vertical frame of the panel units is received by a flow channel equipped with a backflow prevention section and drained toward the water drainage section through a drainage hole communicating with the flow channel. As a result, the number of catch pans used throughout the curtain wall can be reduced, and the reduction in the number of catch pans reduces the number of construction man-hours and the occurrence rate of construction defects such as pressure variations and poor pressure. In addition, since the rainwater received in the flow channel is discharged to the outside side through a discharge hole while preventing backflow, the rainwater discharge performance can be improved. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is an illustrative and schematic perspective view showing a building constructed using a catch pan according to this embodiment. [Figure 2] Figure 2 is an illustrative and schematic perspective view showing catch pans positioned to contact the abutting ends of the vertical and horizontal frame sections that constitute the panel unit of the curtain wall according to this embodiment. [Figure 3] Figure 3 is an illustrative and schematic perspective view showing the state in which the panel unit positioned above the catch pan has been removed from the state shown in Figure 2, completely exposing the top surface of the catch pan. [Figure 4] Figure 4 is an illustrative and schematic perspective view showing the rainwater discharge state in the catch pan of this embodiment. [Figure 5] Figure 5 is an exemplary and schematic perspective view showing other shapes of catch pans according to this embodiment. [Modes for carrying out the invention]

[0013] Illustrative embodiments of the present invention are disclosed below. The configurations of the embodiments shown below, as well as the actions, results, and effects brought about by such configurations, are examples only. The present invention can be realized by configurations other than those disclosed in the following embodiments, and it is possible to obtain at least one of the various effects based on the basic configuration or derived effects.

[0014] Figure 1 is an exemplary and schematic perspective view showing a building M constructed with a curtain wall 10 using the catch pan 22 (see Figure 2) according to this embodiment. As shown in Figure 1, the curtain wall 10 is an assembly of multiple panel units 10a that constitute the exterior wall of building M, and is constructed by arranging the panel units 10a in the vertical and horizontal directions of building M. The catch pan 22 is positioned in a state of being pressed against the abutting ends T, which are the corners of four adjacent panel units 10a. Each panel unit 10a is pre-finished in a factory and transported to the construction site. Each panel unit 10a is lifted by a crane or the like and fixed at a predetermined position on the building frame 12 that constitutes building M by fasteners (mounting brackets). The panel unit 10a is, for example, a roughly rectangular unit with a pair of vertical frames and a pair of horizontal frames, and board materials such as ordinary concrete, lightweight concrete, or metal are supported by the vertical and horizontal frames. The panel unit 10a can also support boards made of glass or the like.

[0015] In the following explanation, when viewing the exterior wall of building M from the outside, the direction to the right in the width direction will be referred to as the X1 direction, and the direction to the left in the width direction will be referred to as the X2 direction. Also, with respect to the exterior wall of building M, the direction toward the outside will be referred to as the Y1 direction, and the direction toward the inside will be referred to as the Y2 direction. Furthermore, the direction toward the upper floors of building M will be referred to as the Z1 direction, and the direction toward the lower floors will be referred to as the Z2 direction.

[0016] Figure 2 is an illustrative and schematic perspective view showing the vertical frame portion 14, horizontal frame portions 16, 18, and 20 of the panel unit 10a that constitute the curtain wall 10 shown in Figure 1, and the catch pans 22 that are positioned at their abutting ends T. Specifically, the vertical frame portion 14 and horizontal frame portion 16 that constitute the upper-floor panel unit 10a are shown, as well as the horizontal frame portion 18 of the lower-floor panel unit 10a and the horizontal frame portion 20 of the lower-floor panel unit 10a adjacent to the horizontal frame portion 18. The catch pans 22 are positioned in a pressed state so as to contact the abutting ends T of each frame portion. Note that in Figure 2, the panel unit 10a (vertical frame portion and horizontal frame portion) on the upper floor side that is positioned adjacent to the vertical frame portion 14 in the X2 direction is omitted from the illustration, and the contact portion between the vertical frame portion 14 and the catch pan 22 is shown. Furthermore, Figure 3 is an illustrative and schematic perspective view showing the state in which the upper-floor panel unit 10a (vertical frame portion 14) positioned on the upper surface of the catch pan 22 is further removed from the state shown in Figure 2, and the upper surface of the catch pan 22 is completely exposed.

[0017] As shown in FIG. 2, on the surface of the vertical frame portion 14 of the panel unit 10a facing the vertical frame portion of the adjacent panel unit 10a, a plurality of rib portions 14a extending in the Z1-Z2 direction are formed. On the other hand, on the vertical frame portion of the panel unit 10a adjacent in the X2 direction (not shown), a plurality of rib portions are formed that fit into the space formed by the two rib portions 14a of the vertical frame portion 14. By combining and connecting the rib portions of the vertical frame portions of the adjacent panel units 10a, an arrangement can be realized that suppresses the intrusion of dust and dirt from the outdoor side to the indoor side of the panel unit 10a. Note that on the horizontal frame portion 18 of the panel unit 10a and the adjacent horizontal frame portion 20, a wall portion 20b that rises in the Z1 direction and extends in the X1-X2 direction is formed. The wall portion 20b can suppress the intrusion of dust and dirt from the outdoor side to the indoor side when the panel unit 10a is installed. Each panel unit 10a (vertical frame portion 14, horizontal frame portions 16, 18, 20, etc.) is connected to each other and fastened to the housing 12 by a fastening member (for example, a bolt, etc., not shown) with a catch pan 22 interposed at the butting end portion T.

[0018] As shown in FIG. 3, the catch pan 22 is composed of a catch pan main body portion 22A, a flow path 24, a backflow prevention portion 26, a drain hole 28, and a draining portion 30.

[0019] The catch pan main body portion 22A is a substantially square block-shaped member having elasticity that can be arranged at a position where the butting end portions T of the four panel units 10a arranged side by side in the vertical direction (Z1-Z2 direction) and the horizontal direction (X1-X2 direction) as described above come into contact. That is, the catch pan main body portion 22A is formed as an integrated single member so that the four adjacent panel units 10a can come into contact. The catch pan main body portion 22A can be composed of, for example, a silicon sponge manufactured by adding a foaming agent to a silicon material. Note that the material constituting the catch pan main body portion 22A is not limited to a silicon sponge, and can be appropriately changed as long as it has elasticity and is formed of a material having waterproofness, corrosion resistance, etc.

[0020] The catch pan main body 22A has, on its upper surface, pressing portions P1 and P2 that abut against the lower ends of the vertical frame portions 14 of the panel unit 10a to press the catch pan main body 22A, and pressing portions P3 and P4 that abut against the lower ends of the vertical frame portions of the panel unit 10a adjacent to the X2 direction side (not shown in FIG. 2) to press the catch pan main body 22A. On the lower surface side of the catch pan 22, the wall portion 20b of the horizontal frame portion 20 of the lower floor side panel unit 10a and the wall portion (not shown) of the horizontal frame portion 18 abut. Therefore, the catch pan 22 is installed in a state of being sandwiched between the panel unit 10a on the upper floor side and the panel unit 10a on the lower floor side. By fixing the panel unit 10a with the catch pan 22 interposed therebetween to the building body 12 in a state of pressing it downward (in the Z2 direction), the pressing portions P1 to P4 of the catch pan main body 22A are crushed, and the adhesion between the catch pan 22 and each panel unit 10a can be easily ensured. An elastic member (for example, a rubber member or the like) may be attached to the lower end of the vertical frame portion. In that case, the adhesion can be further improved by the elastic deformation of the catch pan main body 22A and the elastic deformation of the elastic member on the vertical frame portion side.

[0021] As described above, the catch pan main body 22A functions as a member that contacts the two upper floor side panel units 10a arranged in the X1-X2 direction on the upper surface side. Further, as shown in FIG. 2, the catch pan main body 22A functions as a member that contacts the two lower floor side panel units 10a arranged in the X1-X2 direction on the lower surface side. That is, the catch pan 22 functions as a single member that can be commonly used for the four panel units 10a.

[0022] The flow path 24 is formed as a concave portion on the upper surface of the catch pan main body 22A. The flow path 24 is a groove having a downward slope in the outdoor side (Y1 direction) when the catch pan 22 is installed. The flow path 24 has a function of receiving rainwater that can flow down along the vertical frame surface 14b or the like of the vertical frame portion 14 of the panel unit 10a and flowing it to the outdoor side of the panel unit 10a along the flow path 24.

[0023] The backflow prevention section 26 is formed in a part of the flow path 24. That is, the backflow prevention section 26 is formed, for example, on the indoor side (Y2 direction) of the drain hole 28, which communicates with the flow path 24 and opens to the outside to discharge rainwater to the outside. The backflow prevention section 26 has the function of suppressing rainwater hitting the outer wall side of the panel unit 10a from entering the flow path 24 from the outside, and preventing rainwater flowing in the flow path 24 toward the drain hole 28 from flowing back to the outside due to wind blowing from the outer wall side of the panel unit 10a. In this embodiment, an example is shown in which the backflow prevention section 26 is formed by a tapered section 26a that narrows the width of the flow path 24 communicating with the drain hole 28 in the X1 direction or X2 direction. Note that the backflow prevention section 26 is not limited to the tapered shape described above, and its shape can be changed as appropriate as long as it can suppress the backflow of rainwater.

[0024] As described above, the flow path 24 is equipped with a backflow prevention section 26 in the middle, and a drainage hole 28 is formed downstream thereof, which communicates with the flow path 24 and discharges rainwater to the outside. In this embodiment, as shown in Figure 3, the drainage hole 28 mainly comprises a drainage hole 28a that discharges rainwater received in the flow path 24 to the outside by flowing down along the vertical frame surface 14b of the vertical frame section 14 (panel unit 10a on the X1 direction side) shown in Figure 2, and a drainage hole 28b that mainly discharges rainwater received in the flow path 24 to the outside by flowing down along the vertical frame surface of the vertical frame section of the panel unit 10a on the X2 direction side (not shown in Figure 2). In the case of the catch pan 22 shown in Figure 3, the drainage holes 28 (drainage holes 28a, drainage holes 28b) are provided as a pair, flanking the vertical frame section 14, etc., and are positioned to open towards the outside. As a result, rainwater received in the flow path 24 can be smoothly discharged to the outside.

[0025] Furthermore, the flow path 24 formed in the catch pan body 22A is a common flow path that communicates with the drain holes 28a and 28b. Therefore, even if there is a difference between the amount of rainwater that flows down the vertical frame portion 14 of the panel unit 10a that presses the pressing portions P1 and P2 and the amount of rainwater that flows down the vertical frame portion of the panel unit 10a (not shown) that presses the pressing portions P3 and P4, the drain holes 28a and 28b complement each other's drainage, preventing the flow path 24 from overflowing with rainwater or accumulating in the flow path 24.

[0026] The water drain section 30 is positioned below the drainage holes 28 (drainage holes 28a, 28b) and has the function of absorbing the falling energy of rainwater drained from the drainage holes 28. The water drain section 30 is made of, for example, a hard rubber material and absorbs the falling energy and suppresses splashing compared to when rainwater discharged from the drainage holes 28 directly collides with the steel material constituting the horizontal frame section 18 or horizontal frame section 20. The water drain section 30 has a downward sloping section 30a on the outdoor side (Y1 direction). As a result, the rainwater, whose splashing is suppressed, flows to the outdoor side along the downward sloping section 30a (water drain section 30) and easily flows down along the panel unit 10a on the floor below.

[0027] The drainage section 30 is fixed, for example, to the outdoor side (Y1 direction side) end of the catch pan body 22A with adhesive. Note that the connection between the drainage section 30 and the catch pan body 22A is not limited to adhesive; other connection methods may be used, such as fixing with screws, or molding together when the catch pan body 22A is formed using two-color molding.

[0028] Furthermore, a protruding piece 32 extending in the direction of the lower floor (Z2 direction) is formed approximately in the center of the outdoor end of the drainage section 30. The protruding piece 32 can engage with the gap formed between the vertical frames of panel units 10a that are arranged adjacent to each other in the X1-X2 direction on the lower floor side (Z2 direction side). By engaging the protruding piece 32 with the gap formed by adjacent panel units 10a, it becomes possible to position the catch pan 22 (catch pan body 22A) with respect to the panel units 10a that have already been fixed to the structure 12. In other words, the upper floor panel units 10a are positioned relative to the positioned catch pan 22, thereby improving the positioning accuracy of the upper floor panel units 10a. As a result, it becomes possible to improve the pressing (crushing) accuracy of the catch pan body 22A due to the installation of the panel units 10a, suppress variations in pressing, and contribute to improved watertightness.

[0029] Furthermore, the water drainage section 30 is connected to the horizontal frame water drainage sections 18a and 20a formed on the horizontal frame sections (horizontal frame sections 18 and 20) of the panel unit 10a in the X1-X2 direction (the direction in which the horizontal frame sections extend). As a result, rainwater that flows down the surface of the upper-floor panel unit 10a (for example, the central part) and reaches the horizontal frame water drainage sections 18a and 20a can be directed to the outside (Y1 direction) using the water drainage section 30 and flow down to the vicinity of the connection area of ​​the adjacent panel unit 10a on the lower floor. In other words, it is possible to collect the rainwater flowing down from the upper-floor panel unit 10a and direct it to the lower floor, preventing it from flowing down the surface of the lower-floor panel unit 10a again. As a result, rainwater flowing down the curtain wall 10 can be made less noticeable.

[0030] In the case of the catch pan 22 shown in Figure 3, a recess 34 is formed between the drain holes 28a and 28b. The recess 34 has the function of receiving rainwater that has flowed down the vertical frame surface 14bt (see Figure 2) of the vertical frame portion 14 of the panel unit 10a, which is located on the upper surface of the catch pan 22, on the outdoor side of the flow path 24, and rainwater that has flowed down a similar portion of the panel unit 10a (not shown in Figure 2), and discharging it to the drainage portion 30. In this case, the bottom surface of the recess 34 may also have a downward slope toward the outdoor side (Y1 direction), similar to the drainage portion 30. As a result, the accumulation of rainwater in the recess 34 is suppressed, and rainwater can be smoothly drained to the floor below.

[0031] Figure 4 is an illustrative and schematic perspective view showing the discharge state of rainwater R in the catch pan 22 configured as described above.

[0032] As described above, rainwater R flowing down the vertical frame surface 14b of the vertical frame portion 14 of the panel unit 10a and the vertical frame surface 14Ab of the vertical frame portion 14A of the panel unit 10a adjacent to the vertical frame portion 14 is caught in the flow channel 24 of the catch pan 22. The rainwater R that flows into the flow channel 24 flows towards the outside (Y1 direction) through the backflow prevention section 26 and is discharged from the drain hole 28. When the rainwater R discharged from the drain hole 28 hits the drain section 30, its falling energy is absorbed and it does not bounce back significantly, but flows along the downward slope section 30a on the drain section 30 towards the outside (Y1 direction).

[0033] Thus, the catch pan 22 of this embodiment is configured as a single component that contacts the abutting ends T of the four panel units 10a arranged in a vertical (Z1-Z2 direction) and horizontal (X1-x2 direction) orientation. As a result, the number of catch pans 22 used when installing the panel units 10a can be reduced compared to the conventional case where a catch pan was attached to each panel unit 10a. Furthermore, by reducing the number of catch pans 22 used when installing the panel units 10a, it is possible to reduce the occurrence rate of construction errors (such as improper pressing) during installation (when assembling the panel units 10a). It is also possible to reduce the number of construction man-hours.

[0034] Therefore, even in the curtain wall 10 using the catch pan 22 of this embodiment, it is possible to reduce the occurrence rate of construction errors (such as improper pressing) during installation (when assembling the panel unit 10a) and reduce the number of construction man-hours. In other words, it is possible to improve the watertight performance of the curtain wall 10 and, consequently, improve the quality of the curtain wall 10.

[0035] Figure 5 is an exemplary and schematic perspective view showing another shape of catch pan 22N according to this embodiment. Compared to the catch pan 22 described above, the catch pan 22N has a narrower width in the X1-X2 direction and a different opening position for the drain hole 28N, but the basic configuration, function and method of use are substantially the same as the catch pan 22 shown in Figure 3, etc.

[0036] The catch pan 22N shown in Figure 5 is configured to be applicable when the width of the panel unit 10a in the Y1-Y2 direction is narrower than the width of the panel unit 10a to which the catch pan 22 is applied in the Y1-Y2 direction. In other words, the catch pan 22N is composed of a catch pan body 22NA, a flow path 24N, a backflow prevention section 26N, a drain hole 28N, a drain section 30N, etc. Since the catch pan 22 and the catch pan 22N have substantially the same function, the symbol "N" is added to the reference numerals indicating each component of the catch pan 22N, and a detailed explanation is omitted.

[0037] When setting the width of the catch pan 22N in the Y1-Y2 direction to correspond to the narrow width of the panel unit 10a in the Y1-Y2 direction, it may be difficult to secure space to form two drainage holes 28 that open in the Y1 direction, similar to the catch pan 22. Alternatively, the opening width could be reduced or the number of openings reduced to one to correspond to the width of the catch pan 22N in the Y1-Y2 direction, but this may lead to a decrease in drainage capacity. Therefore, in the case of the catch pan 22N, the drainage holes 28N (drainage holes 28Na, 28Nb) are provided in a pair, sandwiching the vertical frame portion located on the upper surface of the catch pan 22N, and opening along the extending direction (X1-X2 direction) of the horizontal frame portion of the panel unit 10a. By providing the drainage holes 28N on separate surfaces (surfaces facing the X1-X2 direction) in this way, two drainage holes 28N can be easily formed in relation to the flow path 24N. In this case, for example, rainwater discharged from the drain hole 28Nb flows down along the wall portion 20b of the horizontal frame portion 20 of the panel unit 10a on the lower floor side in a manner that suppresses splashing, and flows to the horizontal frame drain portion 20a of the horizontal frame portion 20. Then the rainwater flows to the drain portion 30N, flows to the outside side (Y1 direction), and is discharged to the lower floor side. Similarly, rainwater discharged from the drain hole 28Na flows to the outside side from the drain portion 30N and is discharged to the lower floor side.

[0038] In this way, by forming catch pans 22 and 22N according to the shape of the panel unit 10a, it is possible to reduce construction errors in the curtain wall 10, reduce construction man-hours, improve watertightness, and ultimately improve the quality of the curtain wall 10.

[0039] While embodiments and variations of the present invention have been described, these embodiments and variations are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0040] 10 Curtain Wall 10a Panel Unit 12 skeleton 14,14A Vertical frame section 16,18,20 Horizontal frame part 18a, 20a Horizontal frame drain section 22,22N Catch Pan 22A, 22NA Catch Pan Main Body 24,24N channel 26,26N Backflow prevention section 28,28N Drain hole 30,30N drainage section 30a Downhill section M Building R Rainwater T Butt end

Claims

1. An elastic catch pan body portion into which the abutting ends of multiple panel units arranged in a vertical and horizontal direction come into contact, A channel is formed in the catch pan body that receives rainwater that may flow along the vertical frame of the panel unit and directs it to the outdoor side of the panel unit, A backflow prevention unit provided in a part of the aforementioned flow path, A drainage hole that communicates with the aforementioned flow path and discharges the rainwater to the outdoor side, A drainage section is provided below the drainage hole, which has a downward sloping section on the outdoor side, and which absorbs the falling energy of rainwater drained from the drainage hole. Equipped with, The backflow prevention section includes a tapered section that narrows the width of the flow path in the left-right direction, which communicates with the drain hole. Catch pan.

2. The catch pan according to claim 1, wherein the drainage holes are provided in a pair on either side of the vertical frame portion, opening toward the outside.

3. The catch pan according to claim 1, wherein the drainage holes are provided in pairs on either side of the vertical frame portion and are positioned to open along the extending direction of the horizontal frame portion of the panel unit.

4. A curtain wall comprising a catch pan according to any one of claims 1 to 3.

5. The curtain wall according to claim 4, wherein the drainage portion is connected to a horizontal frame drainage portion formed on the horizontal frame portion of the panel unit in the extending direction of the horizontal frame portion.

Images