JPS5914621Y2 - Counterbalance mechanism for glass doors in vertical windows - Google Patents

Description

[Detailed Description of the Invention] This invention is an improvement to the counterbalance mechanism for stopping at least the lower glass door at an arbitrary vertical height position in a vertically adjustable window.

As shown in Fig. 1, the vertical window has two glass doors 4, 4 which move up and down along vertical grooves 3, 3 formed in the vertical frames 2, 2 on the left and right sides of the sash 1. However, as a counterbalance mechanism 5 for stopping the glass door 4 at an arbitrary vertical position, the one shown in FIG. 4 is well known.

The upper end of a hollow vibro is fixed in the vertical groove 3, a screw plate 9 is inserted into the vibro so as to be movable up and down, and a nut member 11 that is screwed onto the screw plate 9 is rotatably stored at the lower end of the pipe. A spirally wound spring 10 is fitted around the outer circumference of the screw plate 9, and the upper end of the spiral spring 10 is connected and fixed to the vibro and the lower end to the nut member 11, respectively, and a connecting fitting 12 is attached to the protruding lower end of the screw plate 9. It has a structure in which the glass door 4 is connected through the
At the time of assembly, the helical spring 10 is tightened in advance to set a constant spring pressure, so that the glass door 4 does not fall under its own weight when it is lifted to the uppermost position.

That is, even when the helical spring 10 is tightened in advance via the connecting fitting 12 to apply a constant initial spring pressure and the glass door 4 is pulled up to the highest position, the frictional engagement force between the screw plate 9 and the nut member 11 is Glass door 4 overcomes the weight of glass door 4
It is adjusted so that it does not fall under its own weight.

Then, if you pull down the glass door 4 from this state,
The screw plate 9 is pulled out together with the glass door 4 via the connecting fitting 12, and at the same time the nut member 11 screwed onto the screw plate 9 rotates to gradually tighten the helical spring 10. The repulsive force of the helical spring 10 causes a stronger frictional engagement between the screw plate 9 and the nut member 11, and this frictional engagement force overcomes the lifting force of the glass door 4 and the weight of the glass door 4 due to the repulsive force of the helical spring 10. The glass door 4 can be supported and fixed at any vertical height position.

The problem with this is that the glass door 4 has a particularly heavy weight.
This is when the

Originally, when the glass door 4 was pulled down, the spiral spring 10
The tightening of the thread gradually becomes stronger, and the frictional engagement force between the screw plate 9 and the nut member 11 due to the repulsive force of the helical spring 10 increases dramatically.

On the other hand, the repulsive force of the helical spring 10 also acts to pull up the glass door 4, but this pulling force is much smaller than the above-mentioned frictional engagement force.

Therefore, although consideration is given to using a screw plate 9 with a large lead angle so that the helical spring 10 is not excessively tightened when the glass door 4 is lowered, this type of counterbalance mechanism 5 Raising and lowering with 4 pulled down requires a large amount of operating force.

However, if the glass door 4 is important, the amount of tightening of the helical spring 10 is increased in advance to increase the initial spring pressure, that is, the frictional engagement force between the screw plate 9 and the nut member 11, and this frictional engagement force is used to increase the initial spring pressure. Even when the glass door 4 is in the uppermost position, the glass door 4 must be maintained so as not to fall.

If the glass door 4 is pulled down from this state, the helical spring 10 is wound too tightly, and it takes a lot of effort to pull down the glass door 4 against the helical spring 10.

Further, it also requires a great deal of effort to raise and lower the stopped glass door 4 against the force of frictional engagement between the tension plate 9 and the nut member 11 due to the strong repulsive force of the helical spring 10. .

Furthermore, when assembling, the helical spring 10 must be tightened to balance the weight of the glass door 4, and this adjustment is extremely troublesome. tended to be difficult.

In addition, as the weight of the glass door 4 increases, the helical spring 10 must be tightened more tightly.
There is a drawback that assembly work such as connecting the connecting fitting 12 and the glass door 4 against the spring pressure requires a great deal of labor.

This invention solves the disadvantages of the conventional method, and makes it possible to easily and reliably adjust the initial spring pressure of the helical spring, no matter how heavy the glass door is, and to lower the glass door. The present invention is intended to provide a counterbalance mechanism that allows lifting operations to be easily performed with light force.

The details will be explained below based on the drawings.

Fig. 1 shows a raised/lowered window, which extends upward and downward along the vertical grooves 3, 3 formed in the left and right vertical frames 2, 2 of the satsume 1.
The glass doors 4, 4 move up and down, and each glass door 4 has a pair of counterbalance mechanisms 5 installed in the left and right vertical grooves 3, 3,
Supported by 5.

FIG. 2 shows the counterbalance mechanism 5.

In the figure, 6 is a vertically elongated hollow pipe made of synthetic resin, and a pipe 7 is fixed to the upper end in a penetrating manner, and the vibro is fixed in the vertical groove 3 with screws 8 inserted through the iron pipe 7. .

Reference numeral 9 denotes a long threaded plate with a large lead angle, which is formed by gently twisting a band-shaped flat plate, and this threaded plate 9 is inserted into the center of the interior of the vibro from the lower end of its opening.

The upper end of the screw plate 9 is fixed at a position close to the upper end of the vibro in a manner described later, and the lower end is set to a length such that it slightly protrudes downward from the vibro when the glass door 4 is fully raised.

A spiral spring 10 is spirally wound around the outer periphery of the screw plate 9, and is housed in the pipe.

A nut member 11 screwed onto the screw plate 9 is fixed to the upper end of the helical spring 10, and the nut member 11 rotates freely within the pipe.

Reference numeral 12 denotes a connecting fitting that contacts the lower opening edge of the vibro from below, and has an insertion hole 13 through which the screw plate 9 can be inserted freely.The lower end of the spiral spring 10 is fixed to the upper end, and the lower end of the glass door 4 The lower part is connected.

Reference numeral 15 denotes a tension coil spring interposed between the inner circumferential surface of the vibro and the helical spring 10, the upper end of which is wound around and fixed to the tube 7, and the lower end fixed to the connecting fitting 12.

The upper end of the screw plate 9 is connected and fixed to a portion 15a of the coil spring 15.

Now, an initial spring pressure sufficient to support the weight of the glass door 4 is applied to the tension coil spring 15 in advance.

Further, when assembling, the helical spring 10 is tightened to apply a predetermined initial spring pressure to it, but the spring pressure may actually be extremely small.

As shown in FIG. 3, the coil spring 15 is a compression coil spring and is interposed between the seat plate 16 provided on the nut member 11 and the inner lower end of the vibro. It may be designed to support the weight of

As explained above, this invention basically follows the conventional counterbalance mechanism 5, and also inserts a coil spring 15 on the outer periphery of the helical spring 10 inside the vibro to pull up and bias the connecting fitting 12. The coil spring 15 is given in advance an initial spring pressure sufficient to support the weight of the glass door 4, and the conventional spiral spring 10 is given an extremely small initial spring pressure almost regardless of the weight of the glass door 4. .

In such a case, even when the glass door 4 is pulled up to the highest position, the coil 15 supports the glass door 4 so that it does not fall under its own weight.

When the glass door 4 is pulled down against the coil spring 15 in this state, the pulling force of the glass door 4 by the coil spring 15 gradually increases, while the nut member 11 descends along the screw plate 9 as before. While rotating, the helical spring 10 is tightened, and the frictional engagement force between the screw plate 9 and the nut member 11 due to the repulsive force of the helical spring 10 also increases.

However, since this frictional engagement force is always greater than the pulling force of the coil spring 15, the glass door 4 can be held stopped at any lowered position.

In this manner, according to the present invention, it does not require much effort to pull down the heavy glass door 4 against the coil spring 15.

On the other hand, since it is sufficient to apply a very small initial spring pressure to the helical spring 10, the helical spring 10 is not excessively tightened as in the conventional case when the glass door 4 is pulled down.
The frictional engagement force between the screw plate 9 and the nut member 11 is necessary and sufficient to slightly overcome the pulling force of the coil spring 15 and the weight of the glass door 4. Sealing resistance can be significantly reduced compared to conventional products.

As a result, the operating force required to pull down the glass door 4 is extremely small, and even when raising or lowering the glass door 4 from the lowered, stopped state, the aforementioned frictional engagement force can be released with a small operating force, and the overall weight is reduced. It has the advantage that even certain glass doors can be easily moved up and down.

Furthermore, when using the counterbalance mechanism of the present invention, the coil spring 15 can be assembled in the vibro in advance with initial spring pressure applied according to the weight, and the initial spring pressure of the helical spring 10 to be applied at the construction site can be adjusted in advance. The adjustment and the subsequent connection work between the glass door 4 and the connecting fitting 12 can be performed very easily since the initial spring pressure applied to the helical spring 10 is small, and the assembly work at the construction site can also be easily performed.

Furthermore, malfunctions due to improper adjustment of the spring pressure of the coil spring 15 and the helical spring 10 can be effectively and reliably prevented.

[Brief explanation of drawings]

Fig. 1 is a schematic front view of the whole illustrating a lift-down window according to the present invention, Fig. 2 is a longitudinal sectional front view showing its counterbalance mechanism, and Fig. 3 is a schematic diagram of a counterbalance mechanism showing another embodiment of the present invention. FIG. FIG. 4 is a longitudinal sectional front view showing a conventional counterbalance mechanism. 1...Satush, 2...Vertical frame, 3...
...Vertical groove, 4...Glass door, 5...
・Counter balance mechanism, 6...pipe, 7.
...Pipe, Su...Screw plate, 10...
・Spiral spring, 11...Nut member, 12...
...Connection fitting, 13...Insertion hole, 15...
...Coil spring, 16...Seat plate.

Claims (3)

[Scope of utility model registration request] (1) In a lift-down window with a structure in which the lower glass door 4 located at least on the indoor side moves up and down along the vertical grooves 3 formed in the left and right vertical frames 2 of the sash 1, the upper end is supported and fixed to the vertical grooves 3. A long, threaded plate 9 with a large lead angle that is inserted into the center of the inside of the vibro and whose upper end is fixed near the upper end of the vibro, and a spiral wound around the outer periphery of the screw plate 9. a nut member 11 fixed to the upper end of the helical spring 10 and screwed into the screw plate 9; and an insertion hole 13 fixed to the lower end of the helical spring 10 through which the screw plate 9 can be freely inserted. A connecting fitting 12 is located outside the lower end opening of the vibro and is connected to the glass door 4, and a coil spring 15 is interposed in the pipe around the outer periphery of the helical spring 10 and acts to pull up and bias the connecting fitting 12. A counterbalance mechanism for a glass door in a vertically adjustable window, characterized by comprising the following. (2) The counter according to claim 1, wherein the coil spring 15 is a tension coil spring, the upper end of which is fixed to a position close to the upper end of the vibro, and the lower end of which is fixed to the connecting fitting 12. balance mechanism. (3) The coil spring 15 is a compression coil spring and is interposed between the seat plate 16 provided on the nut member 11 and the inner lower end of the vibro, as described in claim 1 of the utility model registration claim. counterbalance mechanism.