JP2007051534A - Fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting in which watertightness is improved by forming a space between a window frame and a sliding screen as a space with the same pressure as the outside air pressure while setting an external air introduction path narrower to prevent rainwater from entering therein. <P>SOLUTION: An indoor side rail side-space 47 formed between the under rail member 12 of an indoor side sliding screen 10 and a lower frame 4 is communicated with an outdoor space through an upper outside air flowing path passed over an indoor side rail part 42 and a lower outside air flowing path through a lower frame hollow part 45. Therefore, the indoor side rail side-space 47 tends to be the space with the same pressure as the outside air pressure, and rainwater is prevented from entering into the indoor side rail side-space 47. Since the outside air can be introduced from the lower outside air flowing path while setting the upper outside air flowing path narrower to prevent rainwater overflowing the indoor side rail part 42 from entering therein, a pressure difference is hard to occur between the indoor side rail side-space 47 and the outside space even when strong wind is blowing. Consequently, the space with the same pressure can be maintained, and the watertightness can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joinery, and more particularly, to a joinery including a window frame having an upper frame, a lower frame, and left and right vertical frames, and a shoji that is supported in the window frame so as to be opened and closed.

Conventionally, joinery such as sash windows provided on the outer wall of a building is generally used, and as a water stop structure in the joinery, outside air is introduced into a space formed between a window frame and a shoji. The structure which tries to prevent intrusion of rainwater etc. by making the atmospheric pressure equal to the outside air is known (see, for example, Patent Document 1).
The water-stop structure described in Patent Document 1 includes the indoor and outdoor pieces of the upper frame, the lower frame, and the left and right vertical frames of the window frame, and the upper, lower, and left and right vertical walls of the shoji. A space is formed between the window frame and each frame material by the contact between the airtight material on the indoor side and the water return on the outdoor side. Rainwater with wind pressure is introduced by introducing outside air from the outside air introduction part (external pressure introduction hole) formed in the lower frame and making the space between the window frame and each frame material equal pressure space with outside air. Etc. are not blown into the isobaric space, and it is difficult to enter the indoor side over the airtight material on the indoor side.
Furthermore, in this water-stopping structure, a water repellent treatment is performed around the outside air introduction part so that a water film is not formed on the outside air introduction part. It is said that the space between can be maintained at the same pressure as the outdoor space.

Japanese Utility Model Publication No. 7-1277

  However, if the outside air introduction part is made small (narrow) in the conventional water stop structure, even if a water film is not formed in the outside air introduction part, the pressure in the outdoor space suddenly rises during strong winds. This is a problem because there is a possibility that rainwater may invade due to a differential pressure in the space between the window frame and each frame material, and the watertight performance may not be ensured.

  An object of the present invention is to make the space between the window frame and the shoji into an isobaric space with the outside air while setting the outside air introduction path to be narrow and preventing inflow of rainwater, thereby improving the watertight performance. It is to provide a joinery that can.

  The joinery of the present invention is a joinery comprising a window frame having an upper frame, a lower frame, and left and right vertical frames, and a shoji that is supported in the window frame so as to be openable and closable. A rail portion for guiding a shoji door, a indoor side wall portion provided facing the indoor side of the rail portion, and a lower side of the rail portion and the indoor side wall portion, provided on the indoor side of the rail portion. A hollow portion, and the shoji is provided with an upper heel, a lower heel, and left and right vertical folds. The lower heel includes a bottom surface portion located above the rail portion of the lower frame, and the bottom surface. The indoor-side and outdoor-side hanging pieces continuously extending downward are provided, the indoor-side hanging pieces and the indoor-side side wall portion of the lower frame are connected via an airtight material, and the lower frame Between the rail part, the upper surface of the hollow part, the indoor side wall part, the airtight material, and the indoor side hanging piece of the lower arm. A rail side space surrounded by a bottom surface portion is formed, and this rail side space is formed via a gap between the rail portion of the lower frame and the bottom surface portion of the lower collar and a gap between the rail portion and the outdoor hanging piece. A first communication hole for communicating the hollow portion with the outdoor space is provided on the outer side surface of the hollow portion of the lower frame, and the shoji is closed on the upper surface of the hollow portion. In this state, a second communication hole is provided that allows the hollow portion to communicate with the rail indoor space.

  Here, the joinery of the present invention may be a single sliding window or a sliding window. In the case of a sliding window, it may be a general two-story sliding window, or a three-story or four-story sliding window.

According to such a structure, the rail side space formed between the lower frame and the shoji is a gap between the rail portion of the lower frame and the bottom surface portion of the lower collar and a gap between the rail portion and the outdoor hanging piece. Since it communicates with the outdoor space via the upper (first) outdoor air conduction path, the outdoor air can be introduced into the rail side space through this upper outdoor air conduction path. Furthermore, since the rail side space communicates with the outdoor space via the lower (second) outside air conduction path constituted by the first communicating hole, the hollow portion, and the second communicating hole, the lower outside air Outside air can also be introduced into the rail lateral space through the conduction path.
Since the upper outside air conduction path is formed on the upper surface side (upper side of the rail portion) of the lower frame where wind and rain are likely to be directly applied, in order to prevent direct intrusion of rainwater into the rail side space, It is desirable that the conduction path is narrowly formed, that is, the gap between the rail portion and the bottom surface of the lower arm and the gap between the rail portion and the outdoor hanging piece are set narrow. In this way, even when the upper outside air conduction path is narrowed, outside air can be introduced into the rail lateral space through the lower outside air conduction path where rainwater is difficult to be directly applied through the hollow portion of the lower frame. The side space is unlikely to generate a differential pressure with respect to the outdoor space, and the isobaric space can be maintained.
Therefore, it is possible to prevent rainwater from entering the rail lateral space with strong winds, so rainwater can be prevented from entering from the position of the airtight material that separates the rail lateral space from the indoor space, thereby improving watertight performance. Can be achieved.

  The joinery of the present invention is a joinery comprising a window frame having an upper frame, a lower frame, and left and right vertical frames, and a pair of indoor and outdoor shojis supported in the window frame so as to be openable and closable. The frame includes indoor and outdoor rail portions for guiding the indoor and outdoor shoji doors, an indoor side wall portion provided facing the indoor side of the indoor rail portion, an indoor rail portion and a room. A hollow portion provided on the indoor side of the indoor rail portion on the lower side of the inner side wall portion, and the indoor and outdoor shojis are respectively configured to include an upper heel, a lower heel, and left and right vertical folds, The lower heel is provided with a bottom surface portion located above the rail portion of the lower frame, and indoor and outdoor hanging pieces continuously extending downward from the bottom surface portion. The indoor side hanging piece and the indoor side wall of the lower frame are connected via an airtight material, and the lower frame Between the indoor side shoji, the indoor side rail lateral space surrounded by the indoor side rail part, the upper surface of the hollow part, the indoor side wall part, the airtight material, the indoor side hanging piece of the lower arm and the bottom part is provided. The indoor side rail lateral space is formed and communicated with the outdoor space via a gap between the indoor side rail portion of the lower frame and the bottom surface portion of the lower collar, and a gap between the indoor side rail portion and the outdoor hanging piece. A first communication hole that communicates the hollow portion with the outdoor space is provided on the outdoor side surface of the hollow portion of the lower frame, and the upper surface of the hollow portion has the indoor shoji in the closed state. A second communication hole that allows the hollow portion to communicate with the indoor rail lateral space may be provided.

  According to such a configuration, in the sliding-type joinery having a pair of indoor and outdoor shoji, the indoor side rail side space formed on the indoor side with respect to the indoor side rail portion is defined as the outdoor space even in strong winds. The space can be made to be isobaric, and it is possible to prevent the intrusion of rainwater with strong wind into the indoor side rail side space and to improve the watertight performance.

In this case, in the joinery of the present invention, the first communication hole is provided at a position below the summoning bowl in the indoor shoji in the closed state, and the second communication hole is in the closed chamber. It is preferable that the inner shoji is provided at a position below the summoning bowl and a position below the door-tower.
According to such a configuration, the first communication hole is provided at the lower position of the summoning bowl in the closed indoor shoji, so that the first communication hole is prevented from raining. Infiltration of rainwater from the hole into the hollow portion can be prevented. In addition, the second communication hole is provided in at least two places spaced apart from each other at the lower position of the summoning fence and the lower position of the door-end fence in the closed indoor side shoji, so that a wide range of the indoor side rail lateral space is provided. The outside air can be efficiently introduced into the interior side rail, and the side space of the indoor rail can be more reliably equalized.

In the joinery of the present invention, the lower frame includes a lower frame upper surface portion extending from the outdoor lower end portion of the hollow portion to the outdoor side and continuing to the base end of the outdoor rail portion, and the outdoor portion of the hollow portion. An extension piece portion extending from the side surface to the outdoor side, and the indoor side hanging piece and the extension piece portion of the lower frame in the outdoor shoji are connected via an airtight material, and the lower frame and the chamber Between the outer shoji, the room surrounded by the outdoor rail part, the lower frame upper surface part, the outdoor side surface of the hollow part, the extending piece part, the airtight material, the indoor hanging part and the bottom part of the lower arm An outer rail side space is formed, and this outdoor rail side space is formed through a gap between the outdoor rail portion of the lower frame and the bottom surface portion of the lower collar, and a gap between the outdoor rail portion and the outdoor hanging piece. Communicated with the outdoor space, and on the outdoor side surface of the hollow portion of the lower frame, the outdoor shoji is closed It is preferable that the third communication hole for communicating the hollow portion to the chamber outer rail side space is provided.
According to such a configuration, outside air is introduced into the outdoor rail lateral space formed on the indoor side with respect to the outdoor rail portion via the first communication hole, the hollow portion, and the third communication hole. Therefore, the outdoor side rail side space can be made the same pressure as the outdoor space even during strong winds, preventing intrusion of rainwater with strong wind into the outdoor rail side space, Further improvement can be achieved.

Further, in the joinery of the present invention, a water stop member for stopping water on the upper surface of the lower frame is provided at a position below the upper side of the lower frame in the closed state of the lower frame of the lower frame. It is preferable that the third communication hole is provided closer to the vertical frame where the door toe of the outdoor shoji comes into contact than the water member.
According to such a configuration, even if rainwater enters the upper surface of the lower frame, the rainwater is prevented by the water-stopping member and is prevented from flowing to the side of the vertical frame where the door rod of the outdoor shoji comes into contact. In addition, the third communication hole is provided in the outdoor rail side space located between the water stop member and the vertical frame with which the door toe of the outdoor shoji comes into contact. The side space of the outdoor rail of the vehicle becomes the same pressure as that of the outdoor space, and rainwater can be prevented from entering. Therefore, rainwater is less likely to enter the joint (metal touch part) between the vertical frame and the lower frame where the door toe of the outdoor shoji comes into contact. Infiltration of rainwater can be prevented, and watertightness can be further improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a part of a sliding window 1 which is a joinery according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing the sliding window 1. 3 and 4 are enlarged longitudinal sectional views showing the lower frame 4 of the sliding window 1, and FIG. 3 is a longitudinal sectional view at the position of the indoor shoji 10A in the closed state. These are the longitudinal cross-sectional views in the outdoor side shoji 10B position of the closed state. FIG.
FIGS. 6A and 6B are a plan view and a front view showing the lower frame 4, respectively, and FIGS. 6 and 7 are perspective views showing the lower frame 4, respectively. FIG. 8 is a perspective view showing a joint portion between the lower frame 4 and the vertical frame 5.
1 and 2, the sliding window 1 includes a window frame 2 fixed to an opening of an outer wall of a building, and a pair of indoor and outdoor shojis 10 (indoor side shojis 10A) supported inside the window frame 2 so as to be opened and closed. , An outdoor shoji 10B). The window frame 2 is formed by a four-round frame of an upper frame (not shown) made of an aluminum material, a lower frame 4 and left and right vertical frames 5. The shoji 10 is composed of an aluminum-shaped upper gutter (not shown), a lower gutter 12, a left and right vertical gutter 13 and a summon gutter 14 (inner summon gutter 14A, outer summit gutter 14B) and , And a glass panel 15 fitted into the interior of the four-sided assembly. In the indoor side shoji 10A and the outdoor side shoji 10B, each door toe 13 is in contact with the vertical frame 5, and the inner and outer summons 14A and 14B are overlapped in the prospective direction and closed.

  As shown in FIGS. 3 and 4, the lower frame 4 includes a lower frame upper surface portion 41 having a downward slope toward the outdoor side, and an indoor side rail portion formed to extend upward from the lower frame upper surface portion 41. 42 and the outdoor side rail part 43, the indoor side wall part 44 provided facing the indoor side of the indoor side rail part 42, and the lower side provided by connecting the indoor side rail part 42 and the indoor side wall part 44. A frame hollow portion (hollow portion) 45 and an extending piece 46 extending from the outdoor side surface 453 of the lower frame hollow portion 45 to the outdoor side are formed. The lower frame hollow portion 45 includes an upper surface portion 451 provided at a position lower than the indoor rail portion 42 and the indoor side wall portion 44, and an indoor side base end portion of the lower frame upper surface portion 41 facing the upper surface portion 451. A substantially rectangular tube having a continuous bottom surface portion 452, an outdoor side surface portion 453 formed by the base end portion of the indoor side rail portion 42, and an indoor side surface portion 454 formed by the indoor side wall portion 44. It is formed in a shape. The door 121 of the indoor shoji 10A is guided to the indoor rail portion 42, and the door 121 of the outdoor shoji 10B is guided to the outdoor rail 43.

  On the other hand, on the lower arm 12 of the shoji 10, a bottom surface portion 122 positioned above the rail portions 42 and 43 inside and outside the lower frame 4, and an indoor side hanging piece extending downward continuously from the bottom surface portion 122. 123 and the outdoor hanging piece 124 are provided. And the airtight material 44A is attached to the upper end part of the indoor side wall part 44 of the lower frame 4, and this airtight material 44A abuts on the indoor side surface of the indoor side hanging piece 123 of the indoor side shoji 10A. An airtight line is formed between the lower arm 12 of the indoor side shoji 10A and the lower frame 4. In addition, an airtight material 46A is attached to the outdoor side end portion of the extended piece portion 46 of the lower frame 4, and this airtight material 46A comes into contact with the indoor side surface of the indoor side hanging piece 123 of the outdoor shoji 10B. As a result, an airtight line is formed between the lower arm 12 and the lower frame 4 of the outdoor shoji 10B.

Between the lower frame 4 as described above and the lower collar 12 of the indoor shoji 10A, the indoor rail section 42, the upper surface section 451 of the lower frame hollow section 45, the indoor side wall section 44, the airtight material 44A, the lower collar The indoor side rail lateral space 47 surrounded by the 12 indoor side hanging pieces 123 and the bottom surface part 122 is formed. The indoor rail side space 47 is formed between a gap between the indoor rail portion 42 and the bottom surface portion 122 of the lower collar 12 of the indoor side shoji 10A, and an outdoor hanging piece 124 of the indoor rail portion 42 and the lower collar 12. It communicates with the outdoor space through a gap. The upper (first) outdoor air conduction path in the indoor shoji 10A is configured by such a path that allows the indoor rail side space 47 to communicate with the outdoor space through the upper side of the indoor rail 42.
Further, between the lower frame 4 and the lower collar 12 of the outdoor shoji 10B, the outdoor rail 43, the lower frame upper surface portion 41, the outdoor side surface portion 453 of the lower frame hollow portion 45, the extending piece portion 46, An outdoor rail lateral space 48 surrounded by the airtight material 46 </ b> A, the indoor hanging piece 123 of the lower rod 12 and the bottom surface portion 122 is formed. The outdoor rail side space 48 is formed between a gap between the outdoor rail 43 and the bottom surface 122 of the lower collar 12 of the outdoor shoji 10B, and between the outdoor rail 43 and the outdoor hanging piece 124 of the lower collar 12. It communicates with the outdoor space through a gap. The upper (first) outdoor air conduction path in the outdoor shoji 10B is configured by such a path that allows the outdoor rail lateral space 48 to communicate with the outdoor space through the upper side of the outdoor rail 43.

As shown in FIGS. 5 and 6, the outdoor side surface 453 of the lower frame hollow portion 45 is provided with a first communication hole 455 that penetrates the outdoor side surface 453, and the first communication hole 455. The lower frame hollow portion 45 is communicated with the outdoor space via the. And the 1st communication hole 455 is provided in the downward position of 14 A of inner summons in the indoor side shoji 10A of the closed state.
Further, in the upper surface portion 451 of the lower frame hollow portion 45, there are two second positions that are spaced apart from each other at the lower position of the inner summing rod 14 </ b> A and the lower position of the door-end rod 13 in the closed indoor sliding door 10 </ b> A. A communication hole 456 is provided. The lower frame hollow portion 45 is communicated with the indoor side rail lateral space 47 through these second communication holes 456.
The indoor side rail lateral space 47 is communicated with the outdoor space by the first communication hole 455 and the second communication hole 456 as described above, and the indoor side shoji is connected by the route through the lower frame hollow portion 45. A lower (second) outside air conduction path in 10A is configured.
Further, a summing portion communication hole 458 that penetrates the indoor side rail portion 42 in a prospective direction is provided at a position below the inner summing rod 14A in the indoor side shoji 10A in the closed state in the indoor rail portion 42. ing. This summing part communication hole 458 communicates the hollow inner space of the inner summoning bowl 14A with the outdoor space, and is used to introduce outside air into the inner summoning bowl 14A to form an isobaric space.

Further, as shown in FIGS. 7 and 8, a third communication hole 457 is provided at a position below the outdoor shoji 10B in the closed state on the outdoor side surface portion 453 of the lower frame hollow portion 45. The lower frame hollow portion 45 communicates with the outdoor rail side space 48 through the third communication hole 457. Further, a water stop block (water stop member) 49 that stops water flowing on the lower frame upper surface portion 41 is provided on the lower frame upper surface portion 41 at a position below the closed outdoor side shoji 10B. The third communication hole 457 is provided closer to the vertical frame 5 (the vertical frame 5 on the left side in FIG. 2) where the door rod 13 of the outdoor shoji 10 </ b> A contacts than the water blocking block 49. The outdoor side rail side space 48 is communicated with the outdoor space by the third communication hole 457 and the first communication hole 455, and the outdoor obstacle block is connected by a path through the lower frame hollow portion 45. A lower (second) outside air conduction path in 10B is formed.
The water blocking block 49 is a resin member, and includes a bottom surface portion 491 that is in close contact with the base end portion of the outdoor rail portion 43 and the lower frame upper surface portion 41, and a gap below the extended piece portion 46. The upper surface part 492 which opposes, and the side part 493 along the indoor side hanging piece 123 of the outdoor shoji 10B are formed. And since a clearance gap is formed between the upper surface part 492 and the extension piece part 46 of the water stop block 49, since ventilation | gas_flowing is made through this clearance gap, the outdoor side rail partitioned off by the water stop block 49 The left and right spaces of the side space 48 are in communication.

The watertight structure between the lower frame 4 and the shoji 10 (especially the indoor shoji 10A) will be described in detail with reference to FIGS.
FIG. 9 (A) is a longitudinal sectional view for explaining a watertight structure between the vicinity of the indoor rail portion 42 of the lower frame 4 and the lower collar 12 of the indoor shoji 10A. FIG. 9 (B) shows the indoor rail portion. It is a figure explaining the ventilation | gas_flowing state in 42 vicinity. FIG. 10 is a longitudinal sectional view for specifically explaining the watertight structure between the vicinity of the indoor rail portion 42 of the lower frame 4 and the lower arm 12 of the indoor shoji 10A.
As shown in FIGS. 9A and 10, the clearance dimension between the indoor side rail portion 42 and the outdoor hanging piece 124 of the lower collar 12 is W1, and the indoor side rail portion extends from the lower end edge of the outdoor hanging piece 124. The height dimension to the upper end edge of 42 is h, and the clearance dimension between the upper end edge of the indoor side rail part 42 and the bottom face part 122 of the lower rod 12 is W2. On the other hand, as shown in FIG. 9B, the atmospheric pressure in the outdoor space is Po, the atmospheric pressure in the indoor space is Pi, and the atmospheric pressure in the indoor side rail side space 47 is Pc. The amount of ventilation in the outside air conduction path is Qa, the amount of ventilation in the lower outside air conduction path via the lower frame hollow portion 45 is Qb, and the ventilation flowing into the indoor space from the gap between the indoor side hanging piece 123 and the airtight member 44A. The quantity is Qi.

Under the above conditions, the airflow rates Qa, Qb, Qi satisfy the relationship Qa + Qb = Qi.
In general, the air flow rate Q is calculated by the following equation (1). In this equation (1), C is an air flow coefficient, A is an opening area, ΔP is a pressure difference (ΔP = Po−Pc), and ρ is an air density.

  On the other hand, since the upper outside air conduction path is formed at a position where wind and rain are likely to be directly applied, the upper outside air conduction path is arranged to prevent rainwater from directly entering the indoor side rail side space 47 through the upper outside air conduction path. It is necessary to narrow the outside air conduction path. That is, as shown in the following equation (2), if the potential energy (left side) necessary for water to pass the indoor rail portion 42 is set larger than the kinetic energy of water (right side), the indoor rail Infiltration of rainwater into the side space 47 can be prevented.

In the above formula (2), m is mass, g is gravitational acceleration, and V is flow velocity. Here, the flow velocity V is calculated by V = Q / (C · A). Therefore, if the flow velocity V is obtained from the air flow rate Qa, the air flow coefficient Ca, and the opening area Aa in the upper outside air conduction path, the required height dimension h of the upper end of the indoor rail 42 is calculated.
Further, the opening area A1 and the air flow coefficient C1 of the gap dimension W1 portion (the gap between the indoor side rail portion 42 and the outdoor hanging piece 124), and the gap size W2 portion (the upper end of the indoor rail portion 42 and the bottom surface of the lower arm 12) Substituting the opening area A2 and the air flow coefficient C2 of the gap between the portion 122 into the equation (2), the following equation (3) is derived. From the expression (3), a relational expression between the opening areas A1 and A2 as in the expression (4) and a relational expression between the gap dimensions W1 and W2 as in the expression (5) are derived. The opening area A2 or the gap dimension W2 is set so as to satisfy the formula (4) or the formula (5), that is, the gap distance between the upper end of the indoor rail portion 42 and the bottom surface portion 122 of the lower rod 12 is set small. By doing so, it becomes possible to prevent rainwater from entering the indoor rail side space 47 beyond the indoor rail portion 42.

Next, in FIG. 10, the dimensions and the like of each part were set as follows.
The height dimension h from the lower end edge of the outdoor hanging piece 124 of the lower rod 12 to the upper end edge of the indoor rail portion 42 was set to 7.0 mm (h = 7.0 mm).
In addition, the gap dimension W1 in the upper outside air conduction path was set to 6.1 mm (W1 = 6.1 mm), and the gap dimension W2 was set to 2.4 mm (W2 = 2.4 mm). Accordingly, the opening area Aa in the upper outside air conduction path when the width dimension of the indoor side shoji 10A is 1.0 m is as follows based on W2 having a small gap dimension.
Aa = 2.4 × 10 ⁻³ (m ² )
In addition, the opening area Ab in the lower outside air conduction path is as follows if six φ8 holes are provided as the first communication hole 455 and the second communication hole 456.
Ab = 3.02 × 10 ⁻⁴ (m ² )
Furthermore, the gap between the indoor-side hanging piece 123 and the airtight material 44A (the indoor-side opening area Ai) was set as follows.
Ai = 4.1 × 10 ^-5 (m ² )

Next, the atmospheric pressure Po in the outdoor space was set as follows.
Po = 1500 Pa = 1500 / 9.8 (kg / m ² )
Further, the pressure Pc of the indoor rail side space 47 was set as follows.
Pc = 1430 (Pa) = 1430 / 9.8 (kg / m ² )
Further, as the air flow coefficient C, the indoor air flow coefficient Ci is set to 1.0 (Ci = 1.0), and the air flow coefficient Ca in the upper outside air conduction path is 0.8 as a stretched water film. (Ca = 0.8).

From each of the above settings, the indoor side air flow rate Qi is calculated as follows based on the equation (1).
Qi = 2.0 × 10 ^-3 (m ³ / s)
From the relational expression of Qa + Qb = Qi and the ratio of the opening areas Aa and Ab, the air flow rate Qa in the upper outside air conduction path is calculated as follows.
Qa = Aa / (Aa + Ab) .Qi = 1.77 × 10 ⁻⁴ (m ³ / s)
Thereby, the flow velocity V in the upper outside air conduction path is as follows.
V = Qa / (Ca · Aa) = 363.6 × 10 ⁻³ (m / s)
By substituting this flow velocity V into the equation (2), the required height dimension hreq of the indoor rail section 42 is calculated as follows.
hreq> 1/2 g · (Qa / CaAa) ² = 6.74 × 10 ⁻³ (m) = 6.74 (mm)
Accordingly, the height h from the lower end edge of the outdoor hanging piece 124 of the lower rod 12 to the upper edge of the indoor rail portion 42 is set to 7.0 mm, and the upper end of the indoor rail portion 42 and the bottom surface portion of the lower rod 12 are set. It was found that the rain water does not enter the indoor rail side space 47 beyond the indoor rail portion 42 by setting the gap dimension W2 to 122 to 2.4 mm.

According to this embodiment, there are the following effects.
(1) That is, the indoor side rail lateral space 47 formed between the lower arm 12 of the indoor side shoji 10 and the lower frame 4 includes an upper outside air conduction path passing through the upper side of the indoor side rail portion 42, and the lower frame. Since it communicates with the outdoor space by the lower outside air conduction path through the hollow portion 45, the indoor side rail side space 47 is likely to be a space having the same pressure as the outdoor space. Infiltration of rainwater can be prevented.
Furthermore, even when the upper outside air conduction path (especially, the gap dimension W2) is set narrow to prevent the intrusion of rain water beyond the indoor rail portion 42, the outside air is introduced into the indoor rail side space 47 through the lower outside air conduction path. Therefore, even when the wind is strong, the indoor side rail side space 47 is unlikely to generate a differential pressure with respect to the outdoor space, and the equal pressure space can be maintained.
Therefore, it is possible to prevent rainwater from entering into the indoor side rail side space 47 accompanied by strong wind, and thus prevent intrusion of rainwater from the position of the airtight material 44A that partitions the indoor side rail side space 47 and the indoor space. Thus, the water tightness can be improved.

(2) The first communication hole 455 is provided in the closed position of the indoor shoji 10A in the closed state so as to prevent rain from entering the first communication hole 455, thereby preventing the first communication. Intrusion of rainwater from the hole 455 into the lower frame hollow portion 45 can be prevented, and the appearance design of the sliding window 1 can be improved by making the first communication hole 455 inconspicuous. Furthermore, the second communication hole 456 is provided at least at two locations spaced apart from each other at the lower position of the summing rod 14A and the lower position of the door rod 13 in the closed indoor side shoji 10A. The outside air can be efficiently introduced into a wide range of the side space 47, and the indoor rail side space 47 can be made more equal pressure.

(3) Further, the upper outside air conduction path passing through the upper side of the outdoor rail portion 43 and the lower outside air via the lower frame hollow portion 45 also to the outdoor rail side space 48 formed below the outdoor shoji 10B. By introducing the outside air through two paths consisting of a conduction path, the outdoor rail side space 48 can be made a space having the same pressure as the outdoor space even in a strong wind. Infiltration of rainwater with strong winds to 48 can be prevented, and watertight performance can be further improved.

(4) Further, since the water blocking block 49 is provided on the lower frame upper surface portion 41 at the lower position of the outdoor shoji 10B, even if rainwater enters the lower frame upper surface portion 41, the rainwater is prevented from flowing into the water blocking block 49. Can be prevented from flowing to the side of the vertical frame 5 where the door toe 13 of the outdoor shoji 10A comes into contact. Accordingly, in addition to the fact that the outdoor rail side space 48 is equalized as described above, the joint portion (metal touch) between the vertical frame 5 and the lower frame 4 with which the door rod 13 of the outdoor shoji 10B abuts. Since it is difficult for rainwater to enter the portion), it is possible to prevent rainwater from entering the indoor space through the gap between the vertical frame 5 and the lower frame 4 and to further improve the watertight performance.

(5) Also, since the summing portion communication hole 458 is provided in the indoor side rail portion 42 at a position below the inner summoning cage 14A in the closed indoor side shoji 10A, the summing portion communication hole 458 is provided. Introducing outside air into the inner summoning bowl 14A, making the inner space of the inner summoning bowl 14A equal to the outdoor space, and preventing rainwater from entering the inner summoning bowl 14A Can do.

Note that the present invention is not limited to the above-described embodiments, and includes other configurations that can achieve the object of the present invention, and includes the following modifications and the like.
For example, in the above embodiment, the sliding window 1 having a pair of indoor and outdoor sliding doors 10 (two) was described, but the joinery of the present invention has a three-story sliding window or a four-story sliding door. It may be a window, and is not limited to a sliding window, and may be a sliding window.
When the joinery of the present invention is a sliding window, the sliding door having substantially the same configuration as that of the indoor sliding door 10A in the sliding window 1, the indoor rail portion 42 in the lower frame 4, and the indoor side wall portion. 44, the airtight material 44A, the lower frame hollow portion 45, the first communication hole 455, and the lower frame having substantially the same configuration as the second communication hole 456.

In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations.
Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

It is a longitudinal section showing a fitting concerning an embodiment of the present invention. It is a cross-sectional view showing the joinery. It is a longitudinal cross-sectional view which expands and shows the lower frame of the said fitting. It is a longitudinal cross-sectional view which expands and shows the said lower frame. (A), (B) is the top view and front view which show the said lower frame. It is a perspective view which shows the said lower frame. It is a perspective view which shows the said lower frame. It is a perspective view which shows the junction part of the said lower frame and a vertical frame. (A), (B) is a figure explaining the watertight structure in the lower frame of the said fitting. It is a longitudinal cross-sectional view explaining the said watertight structure.

Explanation of symbols

  2 ... a window frame which is a frame, 4 ... a lower frame, 5 ... a vertical frame, 10 ... a shoji, 10A ... an indoor shoji, 10B ... an outdoor shoji, 12 ... a lower eaves, 13 ... a door-end eaves (a vertical eave), DESCRIPTION OF SYMBOLS 14 ... Summon bowl, 14A ... Inner summon bowl, 14B ... Outer summon bowl, 41 ... Lower frame upper surface part, 42 ... Indoor side rail part, 43 ... Outdoor rail part, 44 ... Indoor side wall part, 44A, 46A ... Airtight material, 45 ... Lower frame hollow part, 46 ... Extension piece part, 47 ... Indoor side rail side space, 48 ... Outdoor side rail side space, 49 ... Water stop block (water stop member), 122 ... Bottom surface portion 123, indoor side hanging piece 124, outdoor side hanging piece 451, upper surface portion 453, outdoor side surface portion 455, first communication hole 456, second communication hole, 457, third communication hole.

Claims (5)

A window frame having an upper frame, a lower frame, and left and right vertical frames, and a shoji supported in the window frame so as to be opened and closed,
The lower frame includes a rail portion for guiding the shoji door, an indoor side wall portion provided facing the indoor side of the rail portion, and a rail portion below the rail portion and the indoor side wall portion. A hollow portion provided on the indoor side of the
The shoji is configured to include an upper arm, a lower arm, and left and right vertical shafts. The bottom arm includes a bottom surface located above the rail portion of the lower frame, and a lower portion continuous to the bottom surface. Extending indoor and outdoor hanging pieces are provided, the indoor hanging piece and the indoor side wall of the lower frame are connected via an airtight material,
Between the lower frame and the shoji, there is formed a rail side space surrounded by the rail part, the upper surface of the hollow part, the indoor side wall part, the airtight material, the indoor side hanging piece of the lower arm and the bottom part. The rail side space is communicated with the outdoor space via the gap between the rail portion of the lower frame and the bottom surface portion of the lower collar, and the gap between the rail portion and the outdoor hanging piece,
A first communication hole for communicating the hollow portion with the outdoor space is provided on the outdoor side surface of the hollow portion of the lower frame, and the hollow portion is provided on the upper surface of the hollow portion with the shoji being closed. A fitting provided with a second communication hole that communicates with the rail indoor space. A joinery comprising a window frame having an upper frame, a lower frame, and left and right vertical frames, and a pair of indoor and outdoor shojis supported to be opened and closed in the window frame,
The lower frame includes a room-side and outdoor-side rail portion that respectively guides indoor and outdoor shoji doors, an indoor-side side wall portion provided facing the indoor side of the indoor-side rail portion, and an indoor-side rail portion. And a hollow part provided on the indoor side of the indoor rail part below the indoor side wall part,
Each of the indoor and outdoor shojis includes an upper eave, a lower eave, and left and right vertical eaves. The lower eave includes a bottom surface portion located above the rail portion of the lower frame and a continuous bottom surface portion. Then, the indoor side and outdoor side hanging pieces extending downward are provided, and the indoor side hanging piece and the indoor side wall portion of the lower frame in the indoor side shoji are connected via an airtight material,
Between the lower frame and the indoor shoji, the indoor rail surrounded by the indoor rail portion, the upper surface of the hollow portion, the indoor side wall portion, the airtight material, the indoor hanging piece and the bottom surface portion of the lower arm A side space is formed, and this indoor side rail side space is formed outside through the gap between the indoor side rail portion of the lower frame and the bottom surface portion of the lower collar, and the gap between the indoor side rail portion and the outdoor hanging piece. Communicated with the space,
A first communication hole that communicates the hollow portion with the outdoor space is provided on the outdoor side surface of the hollow portion of the lower frame, and the hollow portion is closed on the upper surface of the hollow portion with the indoor shoji being closed. A fitting that is provided with a second communication hole that allows a portion to communicate with the indoor rail side space. The first communication hole is provided at a lower position of a summoning bowl in the indoor shoji in the closed state,
3. The fitting according to claim 2, wherein the second communication hole is provided at a lower position of the summoning fence and a lower position of the door-end fence in the closed indoor sliding door. The lower frame extends from the outdoor lower end of the hollow portion to the outdoor side and extends from the outdoor side of the hollow portion to the outdoor side. An extending piece, and the indoor hanging piece in the outdoor shoji and the extending piece of the lower frame are connected via an airtight material,
Between the lower frame and the outdoor shoji, the outdoor rail part, the lower frame upper surface part, the outdoor side surface of the hollow part, the extending piece part, the airtight material, the indoor hanging part and the bottom part of the lower arm An outdoor rail lateral space surrounded by the outer frame is formed, and the outdoor rail lateral space is defined as a gap between the outdoor rail portion of the lower frame and the bottom surface portion of the lower arm, and the outdoor rail portion and the outdoor hanging piece. Communicated with the outdoor space through a gap with
3. A third communication hole is provided on the outdoor side surface of the hollow portion of the lower frame, and communicates the hollow portion with the outdoor rail lateral space when the outdoor shoji is closed. The joinery according to claim 3.   A water stop member for stopping water on the lower frame upper surface portion is provided below the outdoor frame shoji in the closed state on the lower frame upper surface portion of the lower frame. The fitting according to claim 4, wherein the third communication hole is provided near the vertical frame with which the door toe contacts.

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