JP2006194039A - Framing fitting - Google Patents

Framing fitting Download PDF

Info

Publication number
JP2006194039A
JP2006194039A JP2005009157A JP2005009157A JP2006194039A JP 2006194039 A JP2006194039 A JP 2006194039A JP 2005009157 A JP2005009157 A JP 2005009157A JP 2005009157 A JP2005009157 A JP 2005009157A JP 2006194039 A JP2006194039 A JP 2006194039A
Authority
JP
Japan
Prior art keywords
braided
joinery
insertion groove
plate material
adjusting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2005009157A
Other languages
Japanese (ja)
Inventor
Eiji Kagawa
英司 香川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP2005009157A priority Critical patent/JP2006194039A/en
Publication of JP2006194039A publication Critical patent/JP2006194039A/en
Pending legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a framing fitting by which the size of the entire framing fitting is easily changeable without cutting an outer peripheral part of the framing fitting or without adjusting the size of a plate member, in the framing fitting comprising a frame member framed by stiles and rails and the plate member closing up an opening part of the frame member. <P>SOLUTION: The framing fitting is provided with the frame member 3 framed with the stiles 1 and the rails 2, and the plate member 5 closing up the opening part 4 of the frame member 3. A peripheral end part 6 of the plate member 5 is inserted into an insertion groove 7 formed in the entire inner periphery of the frame member 3. An adjusting space part 8 is formed in the insertion groove 7 to adjust an insertion depth of the plate member 5. By adjusting the insertion depth, the measurement between the stiles 1 or between the rails 2 is adjusted. Thus, the size of the framing fitting can be adjusted easily without changing the size of the plate member 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本願発明は、縦框と横框とで枠組みされた框材と、框材の開口部を閉塞する板材と、を備え、板材端周部を框材の内周全周に設けた差込溝に挿入したドア等の框組建具に関する。   The present invention comprises a saddle material framed by vertical and horizontal saddles, and a plate material that closes the opening of the saddle material, and the insertion end groove provided on the entire inner circumference of the saddle material. The present invention relates to a braided fitting such as an inserted door.

従来から、住宅の建具には、縦框と横框とで枠組みされた框材の開口部に、鏡板やガラス板などの板材を備えた框組建具が用いられている。この框組建具は、框材内周に差込溝を設け、その差込溝に板材を挿入することが一般的である。   2. Description of the Related Art Conventionally, a braided joinery having a plate material such as a mirror plate or a glass plate at an opening portion of a braid framed by vertical and horizontal bunches has been used as a home joinery. In general, this braided joinery is provided with an insertion groove on the inner periphery of the brazing material, and a plate material is inserted into the insertion groove.

ここで、框組建具は、設置する扉枠の寸法に応じてその寸法を設定しなくてはいけない。従って、扉枠の寸法に対応した框組建具を、個別に設計及び製作する必要があった。それに加え、框組建具を設置するときには、扉枠の寸法が設計にくらべて微妙に誤差があるため、框組建具と扉枠間の隙間ができないように、又、框組建具を複数設置するときには框組建具間の距離が適切になるように、框組建具の巾方向を微調整する必要もある。   Here, the size of the braided joinery must be set according to the size of the door frame to be installed. Therefore, it was necessary to individually design and manufacture the braided fitting corresponding to the dimensions of the door frame. In addition, when installing braided joinery, the dimensions of the door frame are slightly different from the design, so that there is no gap between the braided joiner and the door frame, and multiple braided joiners are installed. Sometimes it is necessary to finely adjust the width direction of the braided joinery so that the distance between the braided joinery is appropriate.

このような一般的な框組建具の寸法を調整する方法としては、框組建具を組み上げた後、その外周部を切断するか、もしくは框組建具の組み立て前に、横框もしくは縦框の長さを調整して組み上げることが考えられる。しかしながら、前者は切断部が框組建具を設置したときに外から見える部分であるためにその仕上げに気を配る必要があり、又、特開平8−177327号公報に示すように、框材の表面を化粧シートで装飾した場合、化粧シートも切断されて框材の下地が見えてしまうため、この方法は用いることができない。後者は、縦框もしくは横框の長さを変化させると、框材の開口部の寸法も変化するために、板材をそれに合わせて切断する必要があった。
特開平8−177327号公報
As a method of adjusting the dimensions of such a general braided joinery, after assembling the braided joinery, cut the outer periphery or before assembling the braided joinery, It is conceivable to adjust the assembly. However, since the former is a part that can be seen from the outside when the braided joinery is installed, it is necessary to pay attention to the finish, and as shown in JP-A-8-177327, When the surface is decorated with a decorative sheet, this method cannot be used because the decorative sheet is also cut and the base of the glazing is visible. In the latter case, when the length of the vertical or horizontal ridge is changed, the size of the opening of the ridge material also changes. Therefore, it is necessary to cut the plate material accordingly.
JP-A-8-177327

本願発明は、上記背景技術に鑑みて発明されたものであり、その課題は、縦框と横框とで枠組みされた框材と、框材の開口部を閉塞する板材と、を備えた框組建具において、容易に全体の寸法が変更できる框組建具を提供することである。   The present invention has been invented in view of the above-mentioned background art, and its problem is that the kite includes a kite framed by a vertical kite and a horizontal kite and a plate member that closes the opening of the kite. An object of the present invention is to provide a braided joinery in which the overall dimensions can be easily changed.

上記課題を解決するために、本願発明は、縦框と横框とで枠組みされた框材と、框材の開口部を閉塞する板材と、を備え、板材端周部を框材の内周全周に設けた差込溝に挿入した框組建具において、差込溝内に板材の挿入深さを調整するための調整用空間部を設けており、挿入深さを調整することで縦框間もしくは横框間の寸法が調整されるようになしたことを特徴とする框組建具である。   In order to solve the above-mentioned problems, the present invention comprises a saddle member framed by a vertical fence and a horizontal saddle, and a plate member that closes an opening of the saddle member, and the plate member end peripheral portion is disposed on the entire inner periphery of the saddle member. In the braided fittings inserted in the insertion groove provided on the circumference, an adjustment space for adjusting the insertion depth of the plate material is provided in the insertion groove, and by adjusting the insertion depth, the vertical space Or it is a braided joinery characterized in that the dimensions between the horizontal ribs are adjusted.

本願発明の框組建具においては、框組建具の差込溝内に調整用空間部を設けているため、板材の差込溝への挿入深さを変えることで、框組建具全体の寸法を容易に変えることが出来る。   In the braided joinery of the present invention, since the space for adjustment is provided in the insertion groove of the braided joinery, the dimensions of the entire braided joinery can be changed by changing the insertion depth of the plate material into the insertion groove. It can be easily changed.

図1は、本願の請求項1の発明に対応した実施形態である框組建具を示している。この実施形態の框組み建具は、図1に示す如く、縦框1と横框2とで枠組みされた框材3と、框材3の開口部4を閉塞する板材5と、を備え、板材端周部6を框材3の内周全周に設けた差込溝7に挿入した框組建具において、差込溝7内に板材5の挿入深さを調整するための調整用空間部8を設けており、挿入深さを調整することで縦框1間もしくは横框2間の寸法が調整されるようになしたことを特徴とする框組建具である。   FIG. 1: has shown the braided fitting which is embodiment corresponding to invention of Claim 1 of this application. As shown in FIG. 1, the braided joinery of this embodiment includes a rib 3 framed by a vertical bar 1 and a horizontal bar 2 and a plate 5 that closes an opening 4 of the bar 3, In the braided joinery in which the end periphery 6 is inserted into the insertion groove 7 provided on the entire inner periphery of the saddle member 3, an adjustment space 8 for adjusting the insertion depth of the plate member 5 is provided in the insertion groove 7. It is provided and the braided fitting is characterized in that the dimension between the vertical fences 1 or the horizontal fences 2 is adjusted by adjusting the insertion depth.

以下、この実施形態の框組建具を、より具体的詳細に説明する。まずは、巾方向の寸法を調整できる框組建具の場合である。この実施形態の框組建具では、縦框1と横框2で枠組みされた框材3と、框材3の開口部4を閉塞する板材5とを備えている。ここで、縦框1及び横框2は木製であり、ムク材、MDF、パーティクルボード、集成材や合板などが用いられ、その表面を塗装や化粧シートで装飾していても良い。又、板材5としては、框材3と同様の素材でできた鏡板もしくはガラス板などが選択される。   Hereinafter, the braided joinery of this embodiment will be described in more detail. First, it is the case of a braided joinery that can adjust the dimension in the width direction. The braided joinery of this embodiment includes a brace 3 that is framed by a vertical bar 1 and a horizontal bar 2 and a plate 5 that closes the opening 4 of the brace 3. Here, the vertical gutter 1 and the horizontal gutter 2 are made of wood, such as mulberry material, MDF, particle board, laminated wood, and plywood, and the surface thereof may be decorated with a paint or a decorative sheet. Further, as the plate material 5, a mirror plate or a glass plate made of the same material as that of the eaves 3 is selected.

框材3の内周全周には、連続して差込溝7が設けられ、縦框1及び横框2の断面は略コ字型となっている。板材5は、この差込溝7に挿入されている。この差込溝7内には、板材5の挿入深さを調整するための調整用空間部8が設けられている。従って、差込溝7の深さは、縦框1、横框2及び板材5を何も加工せずに組み立てたとき、板材5の端面と差込溝7の底面との間に空間ができるように設定されている。   The insertion groove 7 is continuously provided on the entire inner periphery of the saddle member 3, and the cross sections of the vertical rod 1 and the horizontal rod 2 are substantially U-shaped. The plate material 5 is inserted into the insertion groove 7. An adjustment space 8 for adjusting the insertion depth of the plate member 5 is provided in the insertion groove 7. Therefore, the depth of the insertion groove 7 is such that a space is formed between the end surface of the plate material 5 and the bottom surface of the insertion groove 7 when the vertical gutter 1, the horizontal gutter 2 and the plate material 5 are assembled without any processing. Is set to

続いて、この実施形態における框組建具の組み立て手順を説明する。まず、框組建具が設置される扉枠の寸法に合う巾となるように、横框2を切断して長さを調整する。次に、板材5を差込溝7に挿入し、横框2の端面と、その端面が接合される縦框1の差込溝7側の部分とを、ダボ加工や接着剤などで、強固に接着することで、框組建具が組みあがる。   Then, the assembly procedure of the braided joinery in this embodiment is demonstrated. First, the horizontal bar 2 is cut and the length is adjusted so that the width matches the dimensions of the door frame on which the braided joinery is installed. Next, the plate material 5 is inserted into the insertion groove 7, and the end surface of the horizontal gutter 2 and the portion on the side of the insertion groove 7 of the vertical gutter 1 to which the end surface is joined are firmly bonded with dowel processing or an adhesive. Glue and joinery can be assembled by bonding to.

従って、この実施形態の框組建具においては、框組建具の差込溝7に調整用空間部8を設けているため、縦框1間の寸法を変化させても、板材5がうまく調整用空間部8に収納され、板材5の寸法を調整することもなく框組建具全体の寸法を容易に変えることが出来る。そのため、框組建具が取り付けられる現場ごとの扉枠の大きさに合わせて、個別に框組建具を製作する必要もない。又、板材5の寸法を変えることなく、横框2もしくは縦框1の長さを調整するだけで框組建具全体の寸法を調整することができるため、微調整も容易に行え、施工現場での加工も容易である。又、框組建具の寸法に合わせて板材5を切断する必要がないので、特に板材5がガラス板のときのように加工しにくく、微調整が困難である場合には適している。   Therefore, in the braided joinery of this embodiment, since the adjustment space 8 is provided in the insertion groove 7 of the braided joinery, the plate material 5 can be used for adjusting well even if the dimensions between the vertical fences 1 are changed. It is housed in the space 8 and the overall size of the braided joinery can be easily changed without adjusting the size of the plate material 5. Therefore, it is not necessary to individually manufacture the braided joinery according to the size of the door frame for each site where the braided joinery is attached. Moreover, since the overall dimensions of the braided joinery can be adjusted simply by adjusting the length of the horizontal bar 2 or vertical bar 1 without changing the dimensions of the plate material 5, fine adjustment can be easily performed at the construction site. Is easy to process. Further, since it is not necessary to cut the plate material 5 in accordance with the dimensions of the braided joinery, it is suitable particularly when the plate material 5 is difficult to be processed and fine adjustment is difficult as when the plate material 5 is a glass plate.

又、框組建具の巾方向の寸法を調整するとき、横框2を切断して長さを調節するので、縦框1の外側を切断するときに比べて切断面が小さくなるため加工しやすく、又、この切断面は框材3を組み上げたときには外から見えない部分であるので、特別な仕上げを必要としない。又、表面に化粧シートを施した縦框1及び横框2を用いた場合でも、横框2を端面と平行に切断するので、框材3の外側を切断したときのように、化粧シートが切断されて框材3の下地が外から見えてしまうこともないので、表面に加工を施した框材3を用いた框組建具にも適用できる。   Also, when adjusting the width direction dimensions of the braided joinery, the horizontal bar 2 is cut and the length is adjusted, so that the cut surface is smaller than when the outer side of the vertical bar 1 is cut, making it easy to process. Further, since this cut surface is a portion that cannot be seen from the outside when the brazing material 3 is assembled, no special finishing is required. Further, even when the vertical gutter 1 and the horizontal gutter 2 with the decorative sheet on the surface are used, the gutter 2 is cut in parallel with the end face, so that the decorative sheet is formed as when the outer side of the gutter material 3 is cut. Since the base of the brazing material 3 is not seen from the outside after being cut, it can also be applied to the braided joinery using the brazing material 3 whose surface is processed.

なお、この実施例において、横框2の差込溝7に調整用空間部8を設け、縦框1の長さを調整すれば、高さ方向の寸法が調整できる框組建具を提供することも可能である。又、この実施例の縦框1と横框2の位置を置換することでも、高さ方向の寸法が調整できる框組建具を提供することができる。   In addition, in this Example, if the space part 8 for adjustment is provided in the insertion groove 7 of the horizontal bar 2 and the length of the vertical bar 1 is adjusted, the braided fitting which can adjust the dimension of a height direction is provided. Is also possible. Further, by replacing the positions of the vertical fence 1 and the horizontal fence 2 in this embodiment, it is possible to provide a braided joinery that can adjust the height dimension.

図2は、本願の請求項2及び請求項3の発明に対応した別の実施形態である框組建具の端面図を示している。この実施形態の框組建具は、図2に示す如く、調整用空間部8の余剰部分10に、スペーサー11を設けている。   FIG. 2: has shown the end elevation of the braided joinery which is another embodiment corresponding to invention of Claim 2 and Claim 3 of this application. As shown in FIG. 2, the braided joinery of this embodiment is provided with a spacer 11 in the surplus portion 10 of the adjustment space 8.

又、対向する差込溝7に、板材5の挿入深さが同じになるようにスペーサー11を設け、板材5を框材3の略中央に配置している。   In addition, a spacer 11 is provided in the opposite insertion groove 7 so that the insertion depth of the plate material 5 is the same, and the plate material 5 is arranged at substantially the center of the saddle material 3.

以下、この実施形態の框組建具を、より具体的詳細に説明する。この実施形態の框組建具では、框材3に設けた調整用空間部8の余剰部分10に、スペーサー11を設けている。スペーサー11はウレタンやゴムなどの適度な弾性を有する素材を選択する。又、対向する調整用空間部8の余剰部分10がほぼ均等になるように、スペーサー11の深さを設け、板材5が框組建具のほぼ中央に配置されている。   Hereinafter, the braided joinery of this embodiment will be described in more detail. In the braided joinery of this embodiment, the spacer 11 is provided in the surplus portion 10 of the adjustment space 8 provided in the brace 3. As the spacer 11, a material having an appropriate elasticity such as urethane or rubber is selected. The depth of the spacer 11 is provided so that the surplus portion 10 of the facing adjustment space portion 8 is substantially uniform, and the plate member 5 is disposed at substantially the center of the braided fitting.

図2(a)、(b)を比較してわかるように、框組建具の寸法が大きいときには、差込溝7の調整用空間部8の余剰部分10は大きくなり、又、框組建具の寸法が小さいときには、差込溝7の調整用空間部8の余剰部分10は小さくなるが、あらかじめ差込溝7の巾に合わせて大きめに作成しておいたスペーサー11を、調整用空間部8の余剰部分10に合わせて切断し、差込溝7に挿入する。   As can be seen by comparing FIGS. 2 (a) and 2 (b), when the size of the braided fitting is large, the surplus portion 10 of the adjustment space 8 of the insertion groove 7 becomes large, When the size is small, the surplus portion 10 of the adjustment space portion 8 of the insertion groove 7 is small. However, the spacer 11 that has been prepared in advance according to the width of the insertion groove 7 is replaced with the adjustment space portion 8. Are cut in accordance with the surplus portion 10 and inserted into the insertion groove 7.

従って、この実施形態の框組建具においては、調整用空間部8の余剰部分10にスペーサー11を設けているため、板材5を框材3の所定位置に固定することができ、框組建具の使用時の板材5のずれやガタツキ音も防止できる。又、調整用空間部8の余剰部分10の寸法が変化しても、スペーサー11を余剰部分10に合わせて切断し、框組建具を組み上げるだけであるので、施工現場での加工も可能である。   Therefore, since the spacer 11 is provided in the surplus portion 10 of the adjustment space portion 8 in the braided joinery of this embodiment, the plate member 5 can be fixed at a predetermined position of the braided member 3. It is possible to prevent the plate material 5 from shifting and rattling noise during use. Further, even if the size of the surplus portion 10 of the adjustment space 8 changes, the spacer 11 is cut along the surplus portion 10 and the braided joinery is assembled, so that processing at the construction site is also possible. .

又、板材5が框材3のほぼ中央になるように、スペーサー11を調整しているため、框材建具の重心が偏っていないので、スムーズに開閉できる框材建具を提供でき、又、立て付けが悪くなることを防止できる。   In addition, since the spacer 11 is adjusted so that the plate member 5 is substantially in the center of the frame member 3, since the center of gravity of the frame member fixture is not biased, a frame member fixture that can be opened and closed smoothly can be provided. It is possible to prevent the attachment from becoming worse.

それ以外の構成については前述実施例と同様であり、効果についても同様のものを有する。   Other configurations are the same as those in the above-described embodiment, and the same effects are obtained.

なお、板材5が框材3にしっかり固定され、框材3から外れる心配がなければ、スペーサー11を対向する差込溝7のどちらか一方のみに設けてもよい。又、図2(c)に示すように、調整用空間部8の余剰部分10がないときには、スペーサー11を設ける必要はない。   Note that the spacer 11 may be provided only in one of the facing insertion grooves 7 as long as the plate member 5 is firmly fixed to the brazing member 3 and there is no fear of coming off from the brazing member 3. Further, as shown in FIG. 2C, when there is no surplus portion 10 of the adjustment space portion 8, it is not necessary to provide the spacer 11.

本願発明の実施形態である框組建具を示す図で、(a)は分解斜視図、(b)は正面図、(c)はA−A断面図。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the braided fitting which is embodiment of this invention, (a) is a disassembled perspective view, (b) is a front view, (c) is AA sectional drawing. 本願発明の別の実施形態である框組建具を示す断面図。Sectional drawing which shows the braided joinery which is another embodiment of this invention.

符号の説明Explanation of symbols

1 縦框
2 横框
3 框材
4 開口部
5 板材
6 板材端周部
7 差込溝
8 調整用空間部
10 余剰部分
11 スペーサー
DESCRIPTION OF SYMBOLS 1 Vertical gutter 2 Horizontal gutter 3 Gutter material 4 Opening part 5 Board | plate material 6 Board | plate material edge part 7 Insertion groove 8 Adjustment space part 10 Surplus part 11 Spacer

Claims (3)

縦框と横框とで枠組みされた框材と、框材の開口部を閉塞する板材と、を備え、板材端周部を框材の内周全周に設けた差込溝に挿入した框組建具において、差込溝内に板材の挿入深さを調整するための調整用空間部を設けており、挿入深さを調整することで縦框間もしくは横框間の寸法が調整されるようになしたことを特徴とする框組建具。   A saddle assembly comprising a saddle material framed by a vertical fence and a horizontal fence and a plate material that closes the opening of the saddle material, and an end peripheral portion of the plate material inserted into an insertion groove provided on the entire inner periphery of the saddle material In the joinery, an adjustment space for adjusting the insertion depth of the plate material is provided in the insertion groove so that the dimension between the vertical and horizontal ribs can be adjusted by adjusting the insertion depth. A braided joinery characterized by what has been done. 調整用空間部の余剰部分に、スペーサーを設けたことを特徴とする請求項1記載の框組建具。   2. The braided joinery according to claim 1, wherein a spacer is provided in an excess portion of the adjustment space. 対向する差込溝に、板材の挿入深さが同じになるようにスペーサーを設け、板材を框材の略中央に配置したことを特徴とする請求項2記載の框組建具。   The braided fitting according to claim 2, wherein a spacer is provided in the opposite insertion groove so that the insertion depth of the plate material is the same, and the plate material is arranged at substantially the center of the saddle material.
JP2005009157A 2005-01-17 2005-01-17 Framing fitting Pending JP2006194039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005009157A JP2006194039A (en) 2005-01-17 2005-01-17 Framing fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005009157A JP2006194039A (en) 2005-01-17 2005-01-17 Framing fitting

Publications (1)

Publication Number Publication Date
JP2006194039A true JP2006194039A (en) 2006-07-27

Family

ID=36800334

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005009157A Pending JP2006194039A (en) 2005-01-17 2005-01-17 Framing fitting

Country Status (1)

Country Link
JP (1) JP2006194039A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018003302A (en) * 2016-06-28 2018-01-11 積水樹脂株式会社 Gate door panel
WO2024016904A1 (en) * 2022-07-16 2024-01-25 陈昊霖 Novel integrated adjustable door and window structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018003302A (en) * 2016-06-28 2018-01-11 積水樹脂株式会社 Gate door panel
WO2024016904A1 (en) * 2022-07-16 2024-01-25 陈昊霖 Novel integrated adjustable door and window structure

Similar Documents

Publication Publication Date Title
US6584667B1 (en) Panel door construction and method of making same
KR101462001B1 (en) Complex windows with removable heat insulation panel
JP5631582B2 (en) Joinery and picture frames
CN107250477A (en) Window frame and architrave component
US20160222719A1 (en) Decorative panel assemblies and associated methods
JP2007113373A (en) Opening frame
JP2006194039A (en) Framing fitting
US6325349B1 (en) Self-leveling window bracket
US7694468B2 (en) Window framing system with decorative overlay and method for using the same
EP2105566B1 (en) Window assembly with a cover panel assembly to cover window opening
JP2008002147A (en) Flush structure door and its manufacturing method
JP2005226375A (en) Remodeling sash
JP2007056490A (en) Door panel with casing structure
JP2006249845A (en) Door
JP5604206B2 (en) Window frame and window frame storage structure using the same
JP6497623B2 (en) Window frame and window frame mounting structure
JP2018150735A (en) Installation assisting tool for outset folding door
JP2007239277A (en) Frame structure of single sliding door
JP2008082120A (en) Door frame and production method used for the same
JP6635802B2 (en) A perforated window and a perforated door that uses it
TWI493101B (en) Ventilation shutter
JP4483689B2 (en) Glazed panel
JP2021017749A (en) Parting material, opening structure therewith, and method of constructing the same
JP2018193692A (en) Frame-less style corner structure of end frame and its construction method
JP2001073637A (en) Supporting device of frame in repaired window