JP2008057653A - Balancer and double-hung window provided with the balancer - Google Patents

Balancer and double-hung window provided with the balancer Download PDF

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JP2008057653A
JP2008057653A JP2006235105A JP2006235105A JP2008057653A JP 2008057653 A JP2008057653 A JP 2008057653A JP 2006235105 A JP2006235105 A JP 2006235105A JP 2006235105 A JP2006235105 A JP 2006235105A JP 2008057653 A JP2008057653 A JP 2008057653A
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cylinder
movable member
balancer
spiral rod
rotate
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Hiroki Tate
弘樹 舘
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YKK AP Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a balancer wherein the balancing force can be adjusted in the state of a single body without being fit to a double-hung window. <P>SOLUTION: The balancer comprises a cylinder 10, a torsional spring 11, a rotational body 12, and a spiral rod 13. When the spiral rod 13 is moved in the longitudinal direction of the cylinder 10, the rotational body 12 is rotated. By the rotation of the rotational body 12, the torsional spring 11 is wound/unwound, and at the same time the rotational body 12 is rotated together with the spiral rod 13. A balancer includes a movable member 14 connected to the spiral rod 13, and the lower end 10c of the periphery 10b of the cylinder 10 and a recess 14a of the movable member 14 are fit to each other so as not to rotate relatively. The balancing force can be adjusted in the following way, that is, in the state in which the torsional spring 11 is wound up by rotating unidirectionally the spiral rod 13 together with the movable member 14, the cylinder 10 and the movable member 14 are fit to each other, the movable member 14 and the cylinder 10 are held so as not to relatively rotate by fitting as stated above the cylinder 10 and the movable member 14 to each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、上げ下げ窓などに用いるスパイラルバランサーと呼ばれるバランサー及び、そのバランサーを備えた上げ下げ窓に関する。   The present invention relates to a balancer called a spiral balancer used for a raising / lowering window and the like, and a raising / lowering window provided with the balancer.

従来、上げ下げ窓においては、障子を任意の位置で停止できるようにする等のために、バランサーを用いている。
例えば、特許文献１にバランサーを用いた上げ下げ窓が開示されている。
前述のバランサーは、筒の内部に捻りばねを設け、この捻りばねの下端部に回転体を固着し、この回転体を筒の下端口部に回転自在に取付け、この回転体のスリット孔に螺旋杆（スパイラルロッド）を挿通し、この螺旋杆の上部を筒の内部に挿入すると共に、下端部にスライド装置（可動部材）を設け、このスライド装置を上下に移動することで螺旋杆が上下に移動し、それによって回転体が回転して捩りばねを巻き締め、巻き戻して捻り力の大きさを変えて、スライド装置を上方に移動する力（釣合力）を増減する、スパイラルバランサーと呼ばれるものである。 Conventionally, in a raising / lowering window, a balancer is used so that the shoji can be stopped at an arbitrary position.
For example, Patent Document 1 discloses a raising / lowering window using a balancer.
The balancer described above is provided with a torsion spring inside the cylinder, a rotating body is fixed to the lower end of the torsion spring, the rotating body is rotatably attached to the lower end opening of the cylinder, and a spiral is formed in the slit hole of the rotating body. Insert a spear (spiral rod) and insert the upper part of this spiral scissors into the inside of the tube, and provide a slide device (movable member) at the lower end. What is called a spiral balancer that moves, thereby rotating the rotating body and tightening the torsion spring, rewinding and changing the amount of torsional force, and increasing or decreasing the force to move the slide device upward (balanced force) It is.

そして、前述のバランサーは次のようにして上げ下げ窓に取付ける。
上げ下げ窓の窓枠の縦枠に前記バランサーの筒を取付け、スライド装置を障子に取付け、その障子を下方に移動することで螺旋杆が下方に移動して回転体が一方向に回転し、捻りばねを巻き締めて捻り力（釣合力）が大きくなり、前記障子を上方に移動することで螺旋杆が上方に移動して回転体が他方向に回転し、捻りばねを巻き戻して捻り力（釣合力）が小さくなるようにする。
このようにすることで、障子の上下位置に応じた捻り力（釣合力）とすることが可能で、その障子を任意の位置で停止できる。 And the above-mentioned balancer is attached to a raising / lowering window as follows.
Attach the balancer tube to the vertical frame of the raising and lowering window frame, attach the sliding device to the shoji, and move the shoji downward to move the spiral rod downward, and the rotating body rotates in one direction, twisting The torsional force (balance force) is increased by tightening the spring, and the spiral rod is moved upward by moving the shoji upward, the rotating body rotates in the other direction, and the torsion spring is rewound to twisting force ( (Balance force) should be reduced.
By doing in this way, it can be set as the twisting force (balance force) according to the up-and-down position of a shoji, and the shoji can be stopped in arbitrary positions.

特開平１１−６２３７３号公報JP 11-62373 A

前述のバランサーを上げ下げ窓に取付けしない状態、いわゆる単体の状態では、そのスライド装置は自由に回転する状態であるから、捻りばねは最も巻き戻った状態で、捻りばねの捻り力はゼロである。
そして、バランサーは、前述の捻り力がゼロの状態で上げ下げ窓に取付けられる。
このために、障子の重量が重い場合等には釣合力が不足することがあるので、前述した従来のバランサーにおいては、スライド装置に調整軸を回転自在に設け、この調整軸に螺旋杆の下端を連結し、バランサーを前述のように上げ下げ窓に取付けた状態で、その調整軸を工具を用いて回転して螺旋杆を回転することで捻りばねを巻き締めて捻り力を大きくし、釣合力を調整できるようにしている。 In a state where the above-described balancer is not attached to the raising / lowering window, that is, a so-called single state, the sliding device is in a freely rotating state, so that the torsion spring is most rewound and the torsion force of the torsion spring is zero.
The balancer is attached to the raising / lowering window in a state where the aforementioned twisting force is zero.
For this reason, when the weight of the shoji is heavy, the balance force may be insufficient. Therefore, in the above-described conventional balancer, the slide device is provided with an adjustment shaft so that the lower end of the spiral rod can be rotated. , And with the balancer attached to the raising and lowering window as described above, the adjustment shaft is rotated with a tool and the spiral rod is rotated to tighten the torsion spring to increase the torsional force and balance force Can be adjusted.

しかしながら、前述のようにバランサーを上げ下げ窓に取付けた状態で、調整軸を前述のようにして回転するのは、狭い空間で実施することになるから、その作業が面倒で、やりづらい。
したがって、バランサーの釣合力の調整作業が面倒で、やりづらい。 However, since the adjustment shaft is rotated in the narrow space with the balancer being raised and lowered as described above, the operation is troublesome and difficult.
Therefore, the adjustment work of the balancer balance force is troublesome and difficult.

本発明の目的は、バランサーを上げ下げ窓等に取付けしない単体の状態で釣合力を調整でき、その釣合力の調整作業が簡単で、やり易いようにしたバランサー及びそのバランサーを備えた上げ下げ窓を提供することである。   An object of the present invention is to provide a balancer capable of adjusting the balance force in a single state where the balancer is not attached to the raising and lowering window, etc., and making the balancing force easy and easy to perform, and a raising and lowering window equipped with the balancer. It is to be.

本発明のバランサーは、筒と捻りばねと回転体とスパイラルロッドを有し、そのスパイラルロッドが筒の長手方向に移動することで回転体が回転し、その回転体の回転により前記捻りばねを巻き締め、巻き戻しすると共に、前記スパイラルロッドを回転することで回転体が一体的に回転するバランサー本体と、
前記スパイラルロッドが連結された可動部材を備え、
前記可動部材とともにスパイラルロッドを一方向に回転して捻りばねを巻き締めた状態で、その可動部材と前記筒を相互に回転しないように保持できると共に、その保持を解除できるようにしたことを特徴とするバランサーである。 The balancer of the present invention includes a cylinder, a torsion spring, a rotating body, and a spiral rod. The spiral rod moves in the longitudinal direction of the cylinder, the rotating body rotates, and the torsion spring is wound by the rotation of the rotating body. A balancer body in which a rotating body integrally rotates by tightening and rewinding and rotating the spiral rod;
A movable member connected to the spiral rod;
The movable member and the cylinder can be held so as not to rotate with each other in a state where the spiral rod is rotated in one direction together with the movable member and the torsion spring is tightened, and the holding can be released. Is a balancer.

前述のバランサーにおいては、筒と可動部材を、その筒の長手方向に相対的に接近する方向に移動することで、前記筒と前記可動部材が相互に回転しないように嵌合することで、可動部材と筒が相互に回転しないように保持し、前記筒と可動部材が嵌合した状態から筒と可動部材を離隔する方向に移動することで可動部材と筒の嵌合が外れて可動部材と筒の保持が解除されるようにすることが好ましい。
このようにすれば、筒を回転しないように支持して、可動部材をスパイラルロッドとともに回転することで捻りばねを巻き締めし、可動部材を筒に向けて移動することで筒と可動部材が嵌合して相互に回転しないように保持されるから、その操作が簡単である。
また、捻りばねの捻り力で筒と可動部材が嵌合した状態を維持でき、上げ下げ窓等に取付ける時に嵌合が外れたりすることがない。
また、バランサーを上げ下げ窓に取付けた状態で障子を移動することで可動部材を筒から離れる方向に移動して保持を解除することができ、その保持を解除する操作が簡単である。 In the balancer described above, the cylinder and the movable member are moved in a direction relatively approaching the longitudinal direction of the cylinder, so that the cylinder and the movable member are fitted so that they do not rotate with each other. The member and the cylinder are held so as not to rotate with each other, and the movable member and the cylinder are disengaged by moving in a direction separating the cylinder and the movable member from a state in which the cylinder and the movable member are fitted. It is preferable to release the holding of the tube.
In this way, the cylinder is supported so as not to rotate, the torsion spring is tightened by rotating the movable member together with the spiral rod, and the movable member is moved toward the cylinder to fit the cylinder and the movable member. Since they are held so as not to rotate together, the operation is simple.
Further, the state in which the tube and the movable member are fitted can be maintained by the twisting force of the torsion spring, and the fitting is not released when it is attached to the raising / lowering window or the like.
Further, by moving the shoji with the balancer raised and lowered to the window, the movable member can be moved away from the cylinder to release the holding, and the operation of releasing the holding is simple.

前述したバランサーにおいては、可動部材に調整用回転体を一方向に回転自在で、他方向には回転しないように設け、この調整用回転体にスパイラルロッドを連結することが好ましい。
このようにすれば、筒と可動部材又は筒とスパイラルロッドが相互に回転しないように保持した状態で、調整用回転体を一方向に回転して捻りばねを巻き締め方向に回転できる。
したがって、釣合力の調整作業がより一層簡単である。 In the balancer described above, it is preferable to provide the movable member with the adjusting rotator so as to be rotatable in one direction and not to rotate in the other direction, and to connect the spiral rod to the adjusting rotator.
In this manner, the torsion spring can be rotated in the winding direction by rotating the adjustment rotating body in one direction while holding the cylinder and the movable member or the cylinder and the spiral rod so as not to rotate with each other.
Therefore, the adjustment work of the balancing force is even easier.

本発明のバランサーは、筒と捻りばねと回転体とスパイラルロッドを有し、そのスパイラルロッドが筒の長手方向に移動することで回転体が回転し、その回転体の回転により前記捻りばねを巻き締め、巻き戻しすると共に、前記スパイラルロッドを回転することで回転体が一体的に回転するバランサー本体と、
前記スパイラルロッドが連結された可動部材を備え、
前記スパイラルロッドを一方向に回転して捻りばねを巻き締めた状態で、そのスパイラルロッドと前記筒を相互に回転しないように保持できると共に、その保持を解除できるようにしたことを特徴とするバランサーであっても良い。 The balancer of the present invention includes a cylinder, a torsion spring, a rotating body, and a spiral rod. The spiral rod moves in the longitudinal direction of the cylinder, the rotating body rotates, and the torsion spring is wound by the rotation of the rotating body. A balancer body in which a rotating body integrally rotates by tightening and rewinding and rotating the spiral rod;
A movable member connected to the spiral rod;
A balancer capable of holding the spiral rod and the cylinder so as not to rotate with each other in a state where the spiral rod is rotated in one direction and a torsion spring is tightened, and the holding can be released. It may be.

このバランサーにおいては、連結用治具を筒とスパイラルロッドに亘って連結することで筒とスパイラルロッドが相互に回転しないように保持し、その連結用治具を外すことで保持を解除できるようにすることが好ましい。
このようにすれば、連結用治具を連結することで筒とスパイラルロッドが相対的に回転しないように保持し、その状態で上げ下げ窓等に取付けできる。
また、バランサーを上げ下げ窓に取付けた状態で連結用治具を取り外すことで保持を解除できる。 In this balancer, by connecting the connecting jig across the cylinder and the spiral rod, the cylinder and the spiral rod are held so as not to rotate with each other, and the holding can be released by removing the connecting jig. It is preferable to do.
If it does in this way, it can hold | maintain so that a cylinder and a spiral rod may not rotate relatively by connecting a connection jig, and it can attach to a raising / lowering window etc. in that state.
Moreover, holding | maintenance can be cancelled | released by removing the connection jig | tool in the state which raised and lowered the balancer and attached to the window.

本発明の上げ下げ窓は、窓枠と、窓枠内に上下動自在に装着された少なくとも１枚の障子を有し、
この窓枠の縦枠に、前記した２つのバランサーのいずれか一方のバランサーの筒を取付け、このバランサーの可動体を障子に取付けたことを特徴とする上げ下げ窓である。 The raising and lowering window of the present invention has a window frame and at least one shoji that is mounted in the window frame so as to be movable up and down.
An up-and-down window characterized in that one of the two balancers described above is attached to the vertical frame of the window frame, and the movable body of the balancer is attached to a shoji.

本発明のバランサーによれば、捻りばねを巻き締めした状態で筒と可動部材、又は筒とスパイラルロッドを相互に回転しないように保持できるので、そのバランサーの釣合力を上げ下げ窓等に取付けない単体の状態で調整でき、その釣合力の調整作業が簡単で、やり易い。
また、前述のように保持した状態で、バランサーを上げ下げ窓等に取付けた後に、その保持を解除すれば、バランサーとしての機能を発揮することができる。 According to the balancer of the present invention, the cylinder and the movable member or the cylinder and the spiral rod can be held so as not to rotate with each other while the torsion spring is tightened, so that the balance force of the balancer is not attached to the window or the like. The balance force can be adjusted easily and easily.
In addition, if the balancer is lifted and lowered after being attached to a window or the like while being held as described above, the function as a balancer can be exhibited.

図１に示すように、窓枠１に障子２を上下移動自在に装着して上げ下げ窓としてある。図１においては、窓枠１の室内寄りと室外寄りに障子２がそれぞれ上下動自在に装着してある。これに限ることはなく、室内寄りの障子又は室外寄りの障子の一方のみを上下動自在に装着しても良い。
前記窓枠１の縦枠３と障子２とに亘ってバランサー４が取付けてある。
前記バランサー４は図２に示すように、筒（パイプ）１０内に捻りばね１１を設け、この捻りばね１１の上端部（長手方向一端部）を筒１０に固定し、下端部（長手方向他端部）に回転体１２が取付けてある。
この回転体１２は筒１０の下端口部（長手方向他端口部）１０ａに回転自在に取付けてある。この回転体１２内にスパイラルロッド（螺旋杆）１３が、そのスパイラルロッド１３が上下方向（長手方向）に移動すると回転体１２が回転すると共に、スパイラルロッド１３を回転すると回転体１２が一体となって回転するように挿通してある。例えば、回転体１２にはスパイラルロッド１３が挿通可能な形状のスリット孔１２ａが形成してある。前述の筒１０、捻りばね１１、回転体１２、スパイラルロッド１３でバランサー本体としてある。 As shown in FIG. 1, a shoji 2 is mounted on a window frame 1 so as to be movable up and down to form a raising and lowering window. In FIG. 1, a shoji 2 is mounted on the window frame 1 so as to be movable up and down on both the indoor side and the outdoor side. The present invention is not limited to this, and only one of the indoor shoji and the outdoor shoji may be mounted so as to be movable up and down.
A balancer 4 is attached across the vertical frame 3 and the shoji 2 of the window frame 1.
As shown in FIG. 2, the balancer 4 is provided with a torsion spring 11 in a cylinder (pipe) 10, and an upper end (one longitudinal end) of the torsion spring 11 is fixed to the cylinder 10, and a lower end (longitudinal other) The rotating body 12 is attached to the end portion.
The rotating body 12 is rotatably attached to a lower end opening (longitudinal other end opening) 10a of the cylinder 10. When the spiral rod 13 moves in the vertical direction (longitudinal direction), the rotary body 12 rotates in the rotary body 12, and when the spiral rod 13 rotates, the rotary body 12 is integrated. It is inserted to rotate. For example, the rotating body 12 is formed with a slit hole 12a having a shape into which the spiral rod 13 can be inserted. The cylinder 10, the torsion spring 11, the rotating body 12, and the spiral rod 13 constitute the balancer body.

前記スパイラルロッド１３の上端部（長手方向一端部）は筒４内に入り込んで捻りばね１１内に挿通し、下端部（長手方向他端部）は筒１０から突出している。そしてスパイラルロッド１３の下端部に可動部材１４が連結してあり、スパイラルロッド１３と可動部材１４は一体となって回転する。
この可動部材１４が障子２に取付けられる。 An upper end portion (one longitudinal end portion) of the spiral rod 13 enters the tube 4 and is inserted into the torsion spring 11, and a lower end portion (the other end portion in the longitudinal direction) protrudes from the tube 10. And the movable member 14 is connected with the lower end part of the spiral rod 13, and the spiral rod 13 and the movable member 14 rotate integrally.
This movable member 14 is attached to the shoji 2.

前記可動部材１４と前記筒１０は、前記捻りばね１１を巻き締めした状態で相互に回転しないように保持できると共に、その保持を解除できるようにしてある。
例えば、筒１０と可動部材１４を、その筒１０の長手方向に相対的に接近する方向に移動することで、筒１０と可動部材１４が相互に回転しないように嵌合して保持し、前述のように嵌合している状態から筒１０と可動部材１４を離隔する方向に移動することで嵌合が外れ、保持を解除する。 The movable member 14 and the cylinder 10 can be held so as not to rotate with each other in a state in which the torsion spring 11 is tightened, and the holding can be released.
For example, by moving the cylinder 10 and the movable member 14 in a direction relatively approaching the longitudinal direction of the cylinder 10, the cylinder 10 and the movable member 14 are fitted and held so as not to rotate with each other. When the cylinder 10 and the movable member 14 are moved away from the fitted state as described above, the fitting is released and the holding is released.

具体的には、図３に示すように筒１０の外周面１０ｂにおける下端部１０ｃを多角形状としてあり、可動部材１４は多角形状の凹部１４ａを有し、この凹部１４ａに前記下端部１０ｃが図４に示すように相互に回転しないように嵌合することで筒１０と可動部材１４を相互に回転しないように保持する。図３では下端部１０ｃを矩形状、凹部１４ａを矩形状の凹部として４つの面が接して嵌合するようにしてある。   Specifically, as shown in FIG. 3, the lower end portion 10c of the outer peripheral surface 10b of the cylinder 10 has a polygonal shape, the movable member 14 has a polygonal concave portion 14a, and the lower end portion 10c is shown in the concave portion 14a. As shown in FIG. 4, the cylinder 10 and the movable member 14 are held so as not to rotate with each other by fitting so as not to rotate with each other. In FIG. 3, the lower end portion 10c is rectangular and the concave portion 14a is a rectangular concave portion.

前述の実施の形態では、筒１０を断面円形のパイプ１５と、そのパイプ１５の下端部に嵌合して取付けた外周面が多角形の筒状体１６より構成し、そのパイプ１５で前述の円形の外周面１０ｂとし、筒状体１６で前述の多角形状の下端部１０ｃとしてある。
前記可動部材１４に多角形の凹陥部１７を上面に開口して形成し、その凹陥部１７を前述の凹部１４ａとしてある。
このようにすることで、従来の筒１０と捻りばね１１と回転体１２とスパイラルロッド１３を備えたバランサー本体を利用して本発明のバランサー本体を簡単に製作できる。 In the above-described embodiment, the pipe 10 has a circular section 15 and the outer peripheral surface of the pipe 15 fitted and attached to the lower end of the pipe 15 is formed of a polygonal cylindrical body 16. A circular outer peripheral surface 10b is formed on the cylindrical body 16 as the above-described polygonal lower end portion 10c.
A polygonal recess 17 is formed in the movable member 14 so as to open on the upper surface, and the recess 17 is the aforementioned recess 14a.
By doing in this way, the balancer main body of the present invention can be easily manufactured using the balancer main body provided with the conventional cylinder 10, the torsion spring 11, the rotating body 12, and the spiral rod 13.

図２に示すように、可動部材１４の凹陥部１７の底部にフック１８を固着し、スパイラルロッド１３の下端部にピン１９を設け、このピン１９とフック１８を係止してスパイラルロッド１３と可動部材１４を相互に回転しないように連結してある。   As shown in FIG. 2, a hook 18 is fixed to the bottom of the recessed portion 17 of the movable member 14, and a pin 19 is provided at the lower end of the spiral rod 13. The movable members 14 are connected so as not to rotate with each other.

次に、釣合力の調整について説明する。
筒１０と可動部材１４を上げ下げ窓に取付けしないバランサー単体の状態では、前述した従来と同様に可動部材１４が筒１０に対して自由に回転するので、捻りばね１１が最も巻き戻った状態となって、捻りばね１１の捻り力はゼロで、釣合力は最も小さい。
前述の状態で筒１０を回転しないように支持して可動部材１４を筒１０に対して一方向に回転すると、その可動部材１４とともに回転体１２が一方向に回転し、捻りばね１０が巻き締められ、捻り力が生じる。
この状態で筒１０の下端部１０ｃ（筒状体１６）と可動部材１４の凹部１４ａ（凹陥部１７）を嵌合することで筒１０と可動部材１４を相互に回転しないように保持する。前述のように嵌合した状態においては、捻りばね１１の捻り力によって可動部材１４を筒１０側に移動する力が生じるので、筒１０と可動部材１４が外れることはない。 Next, adjustment of the balance force will be described.
In the state of the balancer alone in which the cylinder 10 and the movable member 14 are not attached to the raising and lowering window, the movable member 14 freely rotates with respect to the cylinder 10 as in the conventional case, so that the torsion spring 11 is most rewound. Thus, the twisting force of the torsion spring 11 is zero and the balancing force is the smallest.
When the movable member 14 is rotated in one direction with respect to the cylinder 10 while supporting the cylinder 10 so as not to rotate in the state described above, the rotating body 12 rotates in one direction together with the movable member 14, and the torsion spring 10 is tightened. And twisting force is generated.
In this state, the lower end 10c (tubular body 16) of the tube 10 and the recess 14a (recessed portion 17) of the movable member 14 are fitted to hold the tube 10 and the movable member 14 so as not to rotate with each other. In the fitted state as described above, a force for moving the movable member 14 toward the cylinder 10 is generated by the torsional force of the torsion spring 11, so that the cylinder 10 and the movable member 14 are not detached.

これによって、捻りばね１１は最も巻き戻った状態ではなく、ある程度巻き締められた状態となるから、捻りばね１１はある程度の大きさの捻り力を有し、釣合力は、その捻り力に見合うだけ大きくなる。
要するに、上げ下げ窓に取付ける以前のバランサー単体の状態で、可動部材１４を回転することで釣合力を調整できると共に、その調整した釣合力を維持できる。
なお、可動部材１４を筒１０の下端部１０ｃに嵌合するには、その可動部材１４を長手方向に移動することになるので、回転体１２が回転して捻りばね１１の捻り力が前述の調整時の値から変化するが、その変化する値は僅かであるから無視できるし、可動部材１４の移動距離を常に一定とすれば、その変化する値を一定にできるので、それをあらかじめ調整値に含ませることが可能である。 As a result, the torsion spring 11 is not in the most unwound state but is in a state of being tightened to some extent, so that the torsion spring 11 has a certain amount of torsional force, and the balance force is only commensurate with the torsional force. growing.
In short, the balance force can be adjusted by rotating the movable member 14 in the state of the balancer alone before being attached to the raising and lowering window, and the adjusted balance force can be maintained.
In order to fit the movable member 14 to the lower end portion 10c of the cylinder 10, since the movable member 14 is moved in the longitudinal direction, the rotating body 12 rotates and the torsional force of the torsion spring 11 is increased as described above. Although it changes from the value at the time of adjustment, the changing value is negligible and can be ignored. If the moving distance of the movable member 14 is always constant, the changing value can be made constant. Can be included.

前述の実施の形態では、図３、図４に示す筒１０の外周面１０ｂの下端部１０ｃは矩形状で、可動部材１４の凹部１４ａは矩形状であるので、その筒体１０に対して可動部材１４を１／４回転毎に回転して嵌合することができるから、捻りばね１１を１／４回転毎に回転して捻り力を調整できる。
この場合には、下端部１０ｃ、可動部材１４に合いマーク１８ａをそれぞれ設け、その合いマーク１８ａを基準として回転した角度を知ることができる。 In the above-described embodiment, the lower end portion 10c of the outer peripheral surface 10b of the cylinder 10 shown in FIGS. 3 and 4 is rectangular and the concave portion 14a of the movable member 14 is rectangular. Since the member 14 can be rotated and fitted every 1/4 rotation, the torsion force can be adjusted by rotating the torsion spring 11 every 1/4 rotation.
In this case, an alignment mark 18a is provided on each of the lower end portion 10c and the movable member 14, and the angle rotated with reference to the alignment mark 18a can be known.

前述のようにして釣合力を調整したバランサー４は次のようにして上げ下げ窓に取付ける。
前記筒１０を縦枠３に回転しないように固定して取付ける。
前記可動部材１４を障子２に取付け、可動部材１４が筒１０に対して回転しないようにする。
この後に障子２を下方に移動して可動部材１４を下方に移動して筒１０と離隔して保持を解除し、筒１０に対して可動部材１４、スパイラルロッド１３が回転できるようにすることで、バランサーとしての機能を発揮するようにする。
なお、筒１０を縦枠３に回転しないように固定して取付けることで、可動部材１４が縦枠３で回転しないように支持できるようにすれば、前述のように筒１０を取付けた後に可動部材１４を下方に移動して下端部１０ｃと凹部１４ａを離脱して前述の保持を解除し、その後に可動部材１４を障子２に取付けできる。 The balancer 4 having the balancing force adjusted as described above is attached to the raising / lowering window as follows.
The cylinder 10 is fixedly attached to the vertical frame 3 so as not to rotate.
The movable member 14 is attached to the shoji 2 so that the movable member 14 does not rotate with respect to the cylinder 10.
After that, the shoji 2 is moved downward, the movable member 14 is moved downward to be separated from the tube 10 to release the holding, and the movable member 14 and the spiral rod 13 can be rotated with respect to the tube 10. , So that it can function as a balancer.
If the movable member 14 can be supported so as not to rotate with the vertical frame 3 by fixing the cylinder 10 so as not to rotate with respect to the vertical frame 3, it can be moved after the cylinder 10 is mounted as described above. The movable member 14 can be attached to the shoji 2 after the member 14 is moved downward and the lower end portion 10c and the concave portion 14a are detached to release the above-mentioned holding.

図２において、障子２の上部に係合金具２０が取付けてある。この係合金具２０はケース２１内にロッド２２を突出位置と収納位置に摺動自在に設け、ケース２１内の図示しない弾性部材によってロッド２２が突出方向へ付勢されている。そして、ロッド２２が突出位置の場合は、縦枠３の図示しないヒレに係合することで障子２が上下方向のみに移動可能となり、そのロッド２２を摘み２３を持って収納位置とすることで縦枠３のヒレとの係合が解除されるため、障子２が係合軸１４ｃ（障子２の下端部と可動部材１４との連結部分）を中心に室内側方向に揺動自在に支持される。   In FIG. 2, an engagement fitting 20 is attached to the upper part of the shoji 2. This engagement fitting 20 is provided with a rod 22 in a case 21 slidably in a protruding position and a storage position, and the rod 22 is urged in the protruding direction by an elastic member (not shown) in the case 21. When the rod 22 is in the protruding position, the shoji 2 can be moved only in the vertical direction by engaging with a fin (not shown) of the vertical frame 3, and the rod 22 is moved to the storage position with the knob 23. Since the engagement with the fins of the vertical frame 3 is released, the shoji 2 is supported so as to be swingable in the indoor direction around the engaging shaft 14c (the connecting portion between the lower end of the shoji 2 and the movable member 14). The

次に、他の実施の形態を説明する。
前記パイプ１５に嵌合した筒状体１６を、パイプ１５と一体としても良い。
また、図５に示すように筒１０の外周面１０ｂを長手方向全長に亘って矩形状とし、その下端部１０ｃを矩形状としても良い。この場合には筒１０の内周面１０ｄを円形とすることが好ましい。
また、前述の筒１０の外周面１０ｂの下端部１０ｃと可動部材１７の凹部１７ａは、同一形状には限ることはなく、異なる形状でも良い。
例えば、前述の下端部１０ｃを６角形、前述の凹部１４ａを矩形状として回転しないように嵌合するようにする。 Next, another embodiment will be described.
The cylindrical body 16 fitted to the pipe 15 may be integrated with the pipe 15.
Moreover, as shown in FIG. 5, it is good also considering the outer peripheral surface 10b of the cylinder 10 as a rectangular shape over the full length of a longitudinal direction, and making the lower end part 10c into a rectangular shape. In this case, the inner peripheral surface 10d of the cylinder 10 is preferably circular.
Further, the lower end portion 10c of the outer peripheral surface 10b of the cylinder 10 and the concave portion 17a of the movable member 17 are not limited to the same shape, and may be different shapes.
For example, the aforementioned lower end portion 10c is hexagonal and the aforementioned concave portion 14a is rectangular so as to be fitted so as not to rotate.

また、図６に示すように可動部材１４の凹部１４ａを６角形とし、前記筒１０の下端部１０ｃを長方形状として６角形の凹部１４ａの対向した２面に接して嵌合するようにする。この図６に示すようにすれば、１／６回転毎に調整できる。   Further, as shown in FIG. 6, the concave portion 14a of the movable member 14 is hexagonal, and the lower end portion 10c of the cylinder 10 is rectangular and is fitted in contact with two opposing surfaces of the hexagonal concave portion 14a. As shown in FIG. 6, it can be adjusted every 1/6 rotation.

また、図７に示すように筒１０の下端部に筒体２４を取付け、この筒体２４が可動部材１４の外周面１４ｂに回転しないように嵌合するようにする。この筒体２４は一体でも良い。   Further, as shown in FIG. 7, a cylinder 24 is attached to the lower end portion of the cylinder 10, and the cylinder 24 is fitted to the outer peripheral surface 14 b of the movable member 14 so as not to rotate. The cylinder 24 may be integrated.

また、筒１０の下端部と可動部材１４の上端部に相互に嵌合する嵌合凸部と嵌合凹部を設け、その嵌合凸部と嵌合凹部を嵌合することで筒１０の下端部と可動部材１４を相互に回転しないように保持しても良い。
例えば、図８に示すように筒１０の下端部にピン２５を設け、可動部材１４に孔２６を上面に開口して形成し、そのピン２５を嵌合凸部とすると共に、孔２６を嵌合凹部とし、前記ピン２５を孔２６に嵌合して筒１０の下端部と可動部材１４を相互に回転しないように保持する。
以上の各実施の形態においては嵌合した時に操作者がクリック感を得られるようにすることが好ましい。 Further, a fitting convex portion and a fitting concave portion that are fitted to each other are provided on the lower end portion of the cylinder 10 and the upper end portion of the movable member 14, and the lower end of the cylinder 10 is fitted by fitting the fitting convex portion and the fitting concave portion. You may hold | maintain a part and the movable member 14 so that it may not mutually rotate.
For example, as shown in FIG. 8, a pin 25 is provided at the lower end of the cylinder 10, a hole 26 is formed on the upper surface of the movable member 14, the pin 25 is used as a fitting convex portion, and the hole 26 is fitted. The pin 25 is fitted into the hole 26 to hold the lower end of the cylinder 10 and the movable member 14 so as not to rotate with each other.
In each of the above embodiments, it is preferable that the operator can obtain a click feeling when fitted.

以上の各実施の形態では、筒１０と可動部材１４を相互に回転しないように保持したが、筒１０とスパイラルロッド１３を相互に回転しないように保持し、その保持を解除できるようにしても良い。
例えば、図９に示すように連結用治具３０を筒１０とスパイラルロッド１３に回転しないようにそれぞれ連結して筒１０とスパイラルロッド１３が相互に回転しないように保持する。
前記連結用治具３０は、本体３１に筒連結部３２とスパイラルロッド連結部３３を設けたもので、前記筒連結部３２は筒１０に形成した穴３４に嵌合するピン３５としてあり、前記スパイラルロッド連結部３３は一対の突片３６を有し、その一対の突片３６でスパイラルロッド１３を回転しないように挟持するものである。好ましくは、スパイラルロッド１３の直線状部１３ａを挟持するものである。 In each of the above embodiments, the cylinder 10 and the movable member 14 are held so as not to rotate with each other. However, the cylinder 10 and the spiral rod 13 are held so as not to rotate with respect to each other so that the holding can be released. good.
For example, as shown in FIG. 9, the connecting jig 30 is connected to the cylinder 10 and the spiral rod 13 so as not to rotate, and is held so that the cylinder 10 and the spiral rod 13 do not rotate relative to each other.
The connecting jig 30 includes a main body 31 provided with a tube connecting portion 32 and a spiral rod connecting portion 33, and the tube connecting portion 32 is a pin 35 that fits into a hole 34 formed in the tube 10. The spiral rod connecting portion 33 has a pair of projecting pieces 36 and sandwiches the spiral rod 13 so as not to rotate by the pair of projecting pieces 36. Preferably, the linear portion 13a of the spiral rod 13 is sandwiched.

このようであるから、前述のように筒１０を回転しないように支持し、可動部材１４を持ってスパイラルロッド１３を回転して捻り力を調整した状態で、連結用治具３０のピン３５を筒１０の穴３４に嵌合して連結し、かつ一対の突片３６でスパイラルロッド１３の直線状部１３ａを挟持して連結することで、筒１０とスパイラルロッド１３を相互に回転しないように保持する。
なお、前述の筒１０に形成した穴３４は周方向に間隔を置いて４つ形成してあるので、前述のように１／４回転毎に調整できる。 Thus, as described above, the tube 10 is supported so as not to rotate, and the pin 35 of the connecting jig 30 is adjusted with the movable member 14 held and the spiral rod 13 rotated to adjust the twisting force. The tube 10 and the spiral rod 13 are prevented from rotating with each other by being fitted and connected to the hole 34 of the tube 10 and being connected by sandwiching the linear portion 13a of the spiral rod 13 with a pair of projecting pieces 36. Hold.
In addition, since the four holes 34 formed in the above-mentioned cylinder 10 are formed at intervals in the circumferential direction, it can be adjusted every 1/4 rotation as described above.

また、連結用治具３０を、そのスパイラルロッド連結部３３をスパイラルロッド１３に連結して仮取付けし、この状態でスパイラルロッド１３とともに連結用治具３０を筒１０の回りに回転して捻り力を調整し、その後に連結用治具３０の筒連結部３２を筒１０に連結するようにしても良い。
このようにする場合には、図９に示すように本体３１に把手３７を設け、この把手３７を持ってスパイラルロッド１３とともに連結用治具３０を回転する。 Further, the connecting jig 30 is temporarily attached by connecting the spiral rod connecting portion 33 to the spiral rod 13, and in this state, the connecting jig 30 is rotated around the cylinder 10 together with the twisting force. After that, the tube connecting portion 32 of the connecting jig 30 may be connected to the tube 10.
In this case, as shown in FIG. 9, a handle 37 is provided on the main body 31, and the connecting jig 30 is rotated together with the spiral rod 13 by holding the handle 37.

前述の連結用治具３０の筒連結部３２は筒１０の外周面１０ｂを挟持するものでも良い。
例えば、図１０に示すように本体３１に一対の円弧片３８，３８をほぼ円形となるように設け、この一対の円弧片３８，３８の対向間隙間３９を筒１０に強く押しつけることで一対の円弧片３８，３８が弾性拡開変形し、その一対の円弧片３８，３８が筒１０の最大径部分を越えると弾性復元して筒１０の外周面１０ｂを挟持して回転しないように連結する。
このようにすれば、スパイラルロッド１３を筒１０に対して３６０度の任意の範囲で回転しないように連結できるから、前述の捻り力を精度良く調整できる。 The above-described tube connecting portion 32 of the connecting jig 30 may sandwich the outer peripheral surface 10 b of the tube 10.
For example, as shown in FIG. 10, a pair of arc pieces 38, 38 is provided in the main body 31 so as to be substantially circular, and a gap 39 between the pair of arc pieces 38, 38 is strongly pressed against the cylinder 10, thereby When the arc pieces 38 and 38 are elastically expanded and deformed and the pair of arc pieces 38 and 38 exceed the maximum diameter portion of the cylinder 10, the arc pieces 38 and 38 are elastically restored to sandwich the outer peripheral surface 10 b of the cylinder 10 so as not to rotate. .
In this way, since the spiral rod 13 can be connected to the cylinder 10 so as not to rotate within an arbitrary range of 360 degrees, the aforementioned twisting force can be adjusted with high accuracy.

前述した各連結用治具３０は、バランサーを上げ下げ窓に取付けた後に取り外し、前述の保持を解除する。   Each of the connecting jigs 30 described above is removed after the balancer is attached to the raising and lowering window, and the holding is released.

前述の各実施の形態では、可動部材１４を回転してスパイラルロッド１３を回転したり、スパイラルロッド１３を直接回転して捻り力を調整したが、可動部材１４に調整用回転体を設け、その調整用回転体を回転操作して捻り力を調整するようにしても良い。
例えば、図１１に示すように可動部材１４に調整用回転体４０を一方向に回転し、かつ他方向には回転しないように取付ける。例えば、可動部材１４の孔４１に調整用回転体４０を一方向クラッチ４２を介して取付ける。なお、一方向クラッチ４２の代わりに可動部材１４と調整用回転体４０とに亘ってラチェット機構を設けても良い。
前述の一方向とは捻りばね１１を巻き締めする方向である。 In each of the above-described embodiments, the movable member 14 is rotated to rotate the spiral rod 13, or the spiral rod 13 is directly rotated to adjust the twisting force. The twisting force may be adjusted by rotating the adjusting rotator.
For example, as shown in FIG. 11, the adjustment rotating body 40 is attached to the movable member 14 so as to rotate in one direction and not in the other direction. For example, the adjustment rotating body 40 is attached to the hole 41 of the movable member 14 via the one-way clutch 42. A ratchet mechanism may be provided across the movable member 14 and the adjustment rotating body 40 instead of the one-way clutch 42.
The one direction mentioned above is a direction in which the torsion spring 11 is tightened.

前記調整用回転体４０にスパイラルロッド１３を相互に回転しないように連結する。
例えば、調整用回転体４０にフック１８を取付け、このフック１８とスパイラルロッド１３をピン１９で連結する。 The spiral rod 13 is connected to the adjustment rotating body 40 so as not to rotate with respect to each other.
For example, the hook 18 is attached to the adjustment rotating body 40, and the hook 18 and the spiral rod 13 are connected by the pin 19.

このようにすれば、図１１に示すように筒１０と可動部材１４を相互に回転しないように嵌合した状態で、調整用回転体４０をドライバーなどの工具を用いて一方向に回転することで、スパイラルロッド１３とともに回転体１２が一方向に回転し、捻りばね１１を巻き締め方向に回転して捻り力を調整できる。
したがって、捻り力の調整がより一層簡単である。
図１１に示す実施の形態では、筒１０の下端部１０ｃと可動部材１４の凹部１４ａを嵌合して筒１０と可動部材１４を相互に回転しないように保持したが、これに限ることはなく、前述した各実施の形態に示すようにして筒１０と可動部材１４を相互に回転しないように保持しても良い。 In this way, as shown in FIG. 11, the adjusting rotator 40 is rotated in one direction using a tool such as a screwdriver while the cylinder 10 and the movable member 14 are fitted so as not to rotate with each other. Thus, the rotating body 12 rotates in one direction together with the spiral rod 13, and the twisting force can be adjusted by rotating the torsion spring 11 in the winding direction.
Therefore, the adjustment of the twisting force is even easier.
In the embodiment shown in FIG. 11, the lower end portion 10c of the cylinder 10 and the recess 14a of the movable member 14 are fitted to hold the cylinder 10 and the movable member 14 so as not to rotate with each other. However, the present invention is not limited to this. The cylinder 10 and the movable member 14 may be held so as not to rotate with each other as shown in the above-described embodiments.

前述の各実施の形態のバランサーにおいては、図１２に示すように筒１０における外周面１０ｂと内周面１０ｄとの間の部分に、防音材、吸振材、補強材などの部材５０を設けることができる。
例えば、筒１０の外周面１０ｂを矩形とし、内周面１０ｄを円形とし、その４隅に空洞部５１を長手方向全長に亘って有するものとし、その各空洞部５１に前述の部材５０を挿入して設ける。
このようにすることで、バランサーのスパイラルロッド１３が上下動した時に発生する振動、騒音を低減することができる。 In the balancer of each of the above-described embodiments, as shown in FIG. 12, a member 50 such as a sound insulating material, a vibration absorbing material, and a reinforcing material is provided in a portion between the outer peripheral surface 10b and the inner peripheral surface 10d of the cylinder 10. Can do.
For example, the outer peripheral surface 10b of the cylinder 10 is rectangular, the inner peripheral surface 10d is circular, and cavities 51 are provided at the four corners over the entire length in the longitudinal direction, and the aforementioned member 50 is inserted into each of the cavities 51. Provide.
By doing in this way, the vibration and noise which generate | occur | produce when the spiral rod 13 of a balancer moves up and down can be reduced.

バランサーを備えた上げ下げ窓の概略正面図である。It is a schematic front view of the raising / lowering window provided with the balancer. バランサーの取付け状態の断面図である。It is sectional drawing of the attachment state of a balancer. バランサーの筒と可動部材の嵌合する部分を示す斜視図である。It is a perspective view which shows the part which the cylinder of a balancer and a movable member fit. バランサーの筒と可動部材の嵌合した状態の斜視図である。It is a perspective view in the state where a cylinder of a balancer and a movable member were fitted. バランサーの第２の実施の形態を示す斜視図である。It is a perspective view which shows 2nd Embodiment of a balancer. 可動部材と筒の嵌合部分を示す平面図である。It is a top view which shows the fitting part of a movable member and a pipe | tube. バランサーの第３の実施の形態を示す嵌合する部分の断面図である。It is sectional drawing of the part to fit which shows 3rd Embodiment of a balancer. バランサーの第４の実施の形態を示す嵌合する部分の断面図である。It is sectional drawing of the part to fit which shows 4th Embodiment of a balancer. バランサーの筒とスパイラルロッドを連結用治具で連結する第１の実施の形態を示す斜視図である。It is a perspective view which shows 1st Embodiment which connects the cylinder of a balancer, and a spiral rod with the jig for connection. バランサーの筒とスパイラルロッドを連結用治具で連結する第２の実施の形態を示す斜視図である。It is a perspective view which shows 2nd Embodiment which connects the cylinder of a balancer, and a spiral rod with the jig for connection. 可動部材に調整用回転体を設けた実施の形態を示す断面図である。It is sectional drawing which shows embodiment which provided the rotary body for adjustment in the movable member. 筒に防音材、吸振材、補強材を設けた実施の形態を示す筒の横断面図である。It is a cross-sectional view of the cylinder which shows embodiment which provided the sound-insulation material, the vibration-absorbing material, and the reinforcement material in the cylinder.

符号の説明Explanation of symbols

１…窓枠、２…障子、３…縦枠、４…バランサー、１０…筒、１１…捻りばね、１２…回転体、１３…スパイラルロッド、１４…可動部材、３０…連結用治具、４０…調整用回転体。   DESCRIPTION OF SYMBOLS 1 ... Window frame, 2 ... Shoji, 3 ... Vertical frame, 4 ... Balancer, 10 ... Tube, 11 ... Torsion spring, 12 ... Rotating body, 13 ... Spiral rod, 14 ... Movable member, 30 ... Jig for connection, 40 ... rotating body for adjustment.

Claims (6)

筒と捻りばねと回転体とスパイラルロッドを有し、そのスパイラルロッドが筒の長手方向に移動することで回転体が回転し、その回転体の回転により前記捻りばねを巻き締め、巻き戻しすると共に、前記スパイラルロッドを回転することで回転体が一体的に回転するバランサー本体と、
前記スパイラルロッドが連結された可動部材を備え、
前記可動部材とともにスパイラルロッドを一方向に回転して捻りばねを巻き締めた状態で、その可動部材と前記筒を相互に回転しないように保持できると共に、その保持を解除できるようにしたことを特徴とするバランサー。 It has a cylinder, a torsion spring, a rotating body, and a spiral rod. The spiral rod moves in the longitudinal direction of the cylinder to rotate the rotating body, and the torsion spring is wound and unwound by the rotation of the rotating body. A balancer body in which the rotating body rotates integrally by rotating the spiral rod;
A movable member connected to the spiral rod;
The movable member and the cylinder can be held so as not to rotate with each other in a state where the spiral rod is rotated in one direction together with the movable member and the torsion spring is tightened, and the holding can be released. A balancer. 筒と可動部材を、その筒の長手方向に相対的に接近する方向に移動することで、前記筒と前記可動部材が相互に回転しないように嵌合することで、可動部材と筒が相互に回転しないように保持し、前記筒と可動部材が嵌合した状態から筒と可動部材を離隔する方向に移動することで可動部材と筒の嵌合が外れて可動部材と筒の保持が解除されるようにした請求項１記載のバランサー。   By moving the cylinder and the movable member in a direction relatively close to the longitudinal direction of the cylinder, the cylinder and the movable member are fitted so that they do not rotate with each other, so that the movable member and the cylinder are mutually connected. The cylinder is held so that it does not rotate, and the cylinder and the movable member are moved away from the fitted state so that the fitting between the movable member and the cylinder is released, and the holding of the movable member and the cylinder is released. The balancer according to claim 1, wherein 可動部材に調整用回転体を一方向に回転自在で、他方向には回転しないように設け、この調整用回転体にスパイラルロッドを連結した請求項１又は２に記載のバランサー。   The balancer according to claim 1 or 2, wherein an adjustment rotator is provided on the movable member so as to be rotatable in one direction but not in the other direction, and a spiral rod is connected to the adjustment rotator. 筒と捻りばねと回転体とスパイラルロッドを有し、そのスパイラルロッドが筒の長手方向に移動することで回転体が回転し、その回転体の回転により前記捻りばねを巻き締め、巻き戻しすると共に、前記スパイラルロッドを回転することで回転体が一体的に回転するバランサー本体と、
前記スパイラルロッドが連結された可動部材を備え、
前記スパイラルロッドを一方向に回転して捻りばねを巻き締めた状態で、そのスパイラルロッドと前記筒を相互に回転しないように保持できると共に、その保持を解除できるようにしたことを特徴とするバランサー。 It has a cylinder, a torsion spring, a rotating body, and a spiral rod. The spiral rod moves in the longitudinal direction of the cylinder to rotate the rotating body, and the torsion spring is wound and unwound by the rotation of the rotating body. A balancer body in which the rotating body rotates integrally by rotating the spiral rod;
A movable member connected to the spiral rod;
A balancer capable of holding the spiral rod and the cylinder so as not to rotate with each other in a state where the spiral rod is rotated in one direction and a torsion spring is tightened, and the holding can be released. . 連結用治具を筒とスパイラルロッドに亘って連結することで筒とスパイラルロッドが相互に回転しないように保持し、その連結用治具を外すことで保持を解除できるようにした請求項４記載のバランサー。   5. The coupling jig is connected to the cylinder and the spiral rod so that the cylinder and the spiral rod are held so as not to rotate with each other, and the holding can be released by removing the coupling jig. Balancer. 窓枠と、窓枠内に上下動自在に装着された少なくとも１枚の障子を有し、
この窓枠の縦枠に、前記請求項１〜５いずれか１項に記載のバランサーの筒を取付け、このバランサーの可動体を障子に取付けたことを特徴とする上げ下げ窓。

A window frame and at least one shoji that is mounted in the window frame so as to be movable up and down;
A lifting / lowering window, wherein the balancer cylinder according to any one of claims 1 to 5 is attached to a vertical frame of the window frame, and a movable body of the balancer is attached to a shoji.

JP2006235105A 2006-08-31 2006-08-31 Balancer and double-hung window provided with the balancer Pending JP2008057653A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111980506A (en) * 2019-05-22 2020-11-24 Ykk Ap 株式会社 Opening angle retaining device and door and window
US11885162B2 (en) 2022-02-18 2024-01-30 Nakanishi Industrial Co., Ltd. Counter balance device for a sash window

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111980506A (en) * 2019-05-22 2020-11-24 Ykk Ap 株式会社 Opening angle retaining device and door and window
US11885162B2 (en) 2022-02-18 2024-01-30 Nakanishi Industrial Co., Ltd. Counter balance device for a sash window

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