JPH03197785A - Counterbalance mechanism of double-hung window - Google Patents

Abstract

PURPOSE:To increase a vertical stroke of a sash by mounting the upper end of a pipe to the upper part of the sash through a mounting member, and thrusting the upper end of a screw plate into the mounting member so that it is capable of rotating spirally in a state to pull the sash up to the highest position. CONSTITUTION:The upper end of a pipe 5 of a counterbalance mechanism 4 is mounted to the upper part of a sash 1 through a mounting member 6 consisting of a mounting seat 6a and a cylinder 6b provided to the base end of the mounting seat 6a. The upper end of a spiral spring 19 is fixed to the peripheral surface of the cylinder 6b and, at the same time, the upper end of a screw plate 8 is provided to the inside of the cylinder 6b so that it is capable of rotating spirally and thrusting in a state where the sash 3 is pulled up to the highest position. A nut member 10 fixed to the lower end of the spring 19 is supported on the lower end of the inside of the pipe 5 so that it is incapable of vertical motion and is capable of rotating. In addition, the lower end of the screw plate 8 is fixed to a coupling member 7 and, at the same time, the coupling member 7 is coupled with the lower part of the sash 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a counterbalance mechanism for stopping a shoji at an arbitrary vertical height position in a case of a vertical window or the like.

[Conventional technology]

A conventional example of this type of counterbalance mechanism is, for example, Japanese Utility Model Publication No. 59-14622.

The conventional example will be explained based on FIG. 5. It has a vertically long pipe 5 disposed within the length m2 formed on the left and right vertical bars 1a of the sash 1, and the upper end of the pipe 5 is defined on the sash 1 side, A screw plate 8 with a large lead angle is inserted into the pipe 5 so as to be movable up and down, and a nut member 10 is screwed onto the cough relief plate 8.
is rotatably stored on the lower end side of the pipe, and the pipe 5
A helical spring 9 is fitted around the outer circumference of the inner screw plate 8, and the upper end of the helical spring 9 is connected to the upper end of the pipe 5, and its lower end is connected to the nut member 10, and the protruding lower end of the screw plate 8 is connected. It had a structure in which it was connected to the shoji 3 via a member 7. When assembling the window, the spiral spring 9 is wound in advance to give a certain initial spring pressure, so that the shoji 3 will not fall under its own weight when it is pulled up to the highest position.

(Problem to be Solved by the Invention) In a lift-down window, for example, when the glass shoji 3 on the indoor side is set to the rising limit, the glass shoji 3 on the outdoor side is lowered and folded inward, so that the latter shoji 3 is lowered. It is desirable to be able to clean the outside.In those cases, the vertical stroke of the shoji 3 on the indoor side should be increased even if only a little, and even when the shoji 3 is lowered, the threaded plate 8
It is necessary to prevent it from coming off from the nut member 10.

However, in the conventional counterbalance mechanism, as shown in FIG.
It was installed in 1. Then, use the screw 31 to attach the piece 32 inside the upper end of the pipe 5, and
The upper end of a helical spring 9 was fixed to the outer periphery of the helical spring 9.

In this case, the upper limit of the shoji 3 must be set so that the upper end of the screw plate 8 does not butt against the piece 32. Moreover, when the shoji 3 is lowered and the spiral spring 9 is tightened, the 7th member 10 inside the pipe 5 has an upward movement component. Therefore, if the vertical stroke of the shoji 3 is set to be as large as possible, when the shoji 3 is lowered to its lower limit, the screw plate 8 may come off the nut member 10 and be disassembled.

The object of the present invention is to eliminate such conventional problems and solve the above-mentioned problems required for vertical windows.

An object of the present invention is to obtain a counterbalance mechanism that can increase the vertical stroke of the shoji 3 even if the overall length of the pipe 5 is the same as the conventional one.

Another object of the present invention is to provide a counterbalance mechanism that has a simple structure and can be easily attached to the sash 1.

[Means to solve the problem]

The present invention provides a counterbalance mechanism for a lifting/lowering window which basically has a pipe 5, a connecting member 7, a threaded plate 8, a spiral spring 9, and a nut member 10 having the same specifications as the conventional one. The mounting member 6 includes a mounting seat 6a and a cylindrical portion 6b provided at the base end of the mounting seat 6a, and the cylindrical portion 6b of the mounting member 6 is attached to the pipe 5. The mounting seat 6a is fixed to the upper end of the sash 1 by being fitted into the upper end thereof, and the upper end of the helical spring 9 is fixed to the outer periphery of the cylindrical portion 6b within the pipe 5. At the same time, when the shoji 3 is pulled up to the uppermost position, the cylindrical portion 6b
It is required that the upper end of the screw plate 8 be able to enter into the inside of the screw plate 8 so as to be able to rotate freely.

It is desirable that the lower end of the pipe 5 is provided with means for supporting the nut member 10 in a fixed position, immovable up and down, but rotatable.

[Effect]

Since the cylindrical portion 6b of the mounting member 6 is fitted and fixed inside the upper end of the pipe 5, the pipe 5 is secured to the mounting seat 6a of the mounting member 6.
Attach it to the top of Satsui 1 through.

When the shoji 3 is pulled up to the highest position, the screw plate 8
The upper end can protrude into the cylindrical portion 6b of the mounting member 6, regardless of its length.

〔Effect of the invention〕

Therefore, according to the present invention, even if the pipe length is the same as before, the vertical stroke of the shoji 3 can be increased by the vertical length that allows the upper end of the screw plate 8 to protrude into the cylindrical portion 6b of the mounting member 6. can. As a result, the shoji 3 can be pulled up higher than before, and even when the shoji 3 is lowered to its lower limit, an unexpected situation in which the upper end of the screw plate 8 comes off from the nut member IO can be well prevented. Particularly, when the nut member 10 is rotated at a fixed position at the lower end inside the pipe 5 without being able to move vertically, the removal of the screw plate 8 from the nut member 10 can be more completely prevented with a design margin.

Moreover, even if the vertical length of the cylindrical portion 6b is large, there is no problem in inserting the screw plate 8 into the cylindrical portion 6b. Can be firmly fixed.

〔Example〕

Fig. 4 shows the vertical window as seen from the indoor side. Vertical grooves 2, 2 are formed in the left and right vertical bars 1a, 1a of the aluminum sash 1, and two upper and lower panels are formed along the vertical grooves 2, 2. Glass shoji 3.3 moves up and down. Each shoji 3 has vertical grooves 2 and 2 on the left and right.
It is supported by a pair of left and right counterbalance mechanisms 4 installed inside, and can be set in any vertical position.

In FIGS. 1 to 3, the counterbalance mechanism 4
These include: a vertically elongated pipe 5 whose upper end is fixed to the sash 1 and arranged in the vertical groove 2; a mounting member 6 for connecting and fixing the pipe 5 to the upper part of the sash 1; and a lower end of the pipe 5 outside the opening. a connecting member 7 located at and connected to the lower part of the shoji 3; a long screw plate 8 inserted into the pipe 5 and having its lower end fixed to the connecting member 7; and an outer periphery of the screw plate 8. a spiral spring 9 which is spirally wound around the pipe 5 and whose upper end is fixed in a suspended state to the upper end of the pipe 5; and a spiral spring 9 which is rotatably attached to the lower end of the pipe 5;
The lower end of the helical spring 9 is fixed, and the screw plate 8 is screwed into the nut member 1o in an inserted state.

The pipe 5 is an extrusion molded product of aluminum, has a circular internal cross-section, a regular octagonal external cross-sectional shape, and has its outer surface subjected to alumite treatment in advance.

The mounting member 6 is a zinc die-cast molded product as shown in FIGS. 2 and 3, and is formed in an L-shape with a cylindrical portion 6b extending downward from the base end of a horizontal mounting seat 6a.
The cylindrical portion 6b is fitted into the upper end of the pipe 5 from above and fixed to the pipe 5 with two screws 11, and the mounting seat 6a is attached to the upper frame 1b of the sash 1 with screws 12.

The helical spring 9 is a long strip-shaped spring plate wound into a coil. The upper end of the helical spring 9 is wound around and fixed to the outer periphery of the cylindrical portion 6b of the mounting member 6, so that it is suspended and supported.

The connecting member 7 is preferably made of a self-lubricating plastic material such as nylon resin or polyacecool resin, and its tip side is fixed to the lower frame 3a of the shoji 3 with screws 13. The base end of the connecting member 70 is provided with a metal screw plate support member 14 formed into a short cylindrical shape.

The screw plate 8 is formed by gently twisting a band-shaped flat metal plate such that the lead angle increases as it goes upward. The lower end of the screw plate 8 is inserted into the screw plate support member 14 and fixed with a through pin 15.

When the shoji 3, that is, the screw plate 8 is pushed up to the uppermost position, the upper part of the screw plate 8 enters into the center hole 16 of the cylindrical portion 6b of the mounting member 6 so as to be able to rotate freely in a spiral manner, as shown in FIG. The length of the screw plate 8 is set. Thereby, the screw plate 8 can be set longer than the conventional one by the length of the plunge into the cylindrical part 6b, and it is possible to effectively cope with the case where the vertical stroke of the shoji 3 is large.

As shown in FIG. 2, the screw plate support member 14 can be rotated from below in the direction of tightening the helical spring 9 by operating a screwdriver, and the reversal can be prevented by the ratchet member 17, thereby tightening the helical spring. 9 can be given an initial spring pressure that balances the weight of the shoji 3.

The nut member 10 is also a self-lubricating plastic molded product such as nylon resin or polyacecool resin, and the lower end of the helical spring 9 is wound around and fixed to a cylindrical portion 10a that integrally extends above the nut member 10. As shown in FIG. 2, the screw plate 8 is inserted into the center hole 18 of the cylindrical portion 10a, and is inserted into the slit-shaped engagement hole 19 formed inside the nut member 10.
A screw plate 8 is screwed into the plate 8 in a penetrating manner.

A downward annular stepped portion 1ob is formed on the outer periphery of the nut member 10, and a slit is formed in the lower cylindrical portion to form four engaging pawls 10c, each of which can be elastically deformed in the inner and outer directions independently. It is formed.

The nut member 10 includes these engaging claws 10c and the stepped portion 10.
The tip of the vibrator 5 is fixed to the lower end of the vibrator 5 via the collar member 20, and is fitted inside the collar member 20 so as not to be able to move up and down, but to be able to rotate.

The collar member 20 is also a self-lubricating plastic molded product such as nylon resin or polyacetal resin, and above the step portion 20a on the top surface there are four engaging members each of which can be elastically deformed in the inner and outer directions independently. A claw 20b is provided, and a downwardly facing stepped portion 20c is formed in a circumferential manner on the inner peripheral surface of the collar member 20.

In FIGS. 2 and 3, an annular engagement groove 21 is formed in the lower part of the inner surface of the vibrator 5, and the engagement claw 20b is inserted into the vibrator 5 from the lower opening end side of the collar member 20. When press-fitted, the engaging claws 20b are once elastically deformed inward, and then the upper ends of each engaging claw 20b are engaged with the engaging grooves 21 by elastic restoring force, and the collar member 20 is thereby inserted into the vibrator 5. Controls the contact with the lower part of the puller. At the same time, the collar part 2
The upward step portion 20a of the vibrator 5 is fixed to the lower end of the vibrator 5.

When assembling the Kimoto counterbalance mechanism 4,
The upper end of the helical spring 9 is fixed to the cylindrical part 6b of the upper mounting member 6, and the lower end of the helical spring 9 is attached to the cylindrical part 10 of the nut member 10.
It sticks to a.

Separately, attach a collar member 20 to the lower end of the vibrator 5 with its engaging claw 2.
With 0b fitted inside, they are fixed together as described above.

Thus, the nut member 10 integrated with the mounting member 6 via the helical spring 9 is fitted into the pipe 5 from the upper end of the opening, and the nut member 10 is introduced into the vibrator 5 near the lower end.

Next, prepare a tool with a T-shaped upper end, insert it into the vibrator 5 from the outside of the lower end, engage the T-shaped tip of the tool into the engagement hole 19 of the nut member 10, and tighten the nut. The tool is hooked onto the nut member 10, and the nut member 10 is forcibly pulled down using the tool. As a result, the lower engaging claw 10C of the nut member 10 is once elastically deformed inward and enters the inner side of the collar member 20, and each engaging claw is attached to the stepped portion 20c near the inner lower end of the collar member 20. At the same time that the lower end of the nut member 10 c is rotated and engaged, the downward step portion 10 b of the nut member 10 is stopped by the upper end of the engaging claw 20 b of the collar member 20 . Then, the lower inner fitting portion of the nut member 10 pushes the engaging claws 20b of the collar member 20 outward from the inside, so that each engaging claw 20b engages with the engaging groove 21 on the pipe 5 side. maintain the condition.

Since the downward cylindrical portion 6b of the mounting member 6 is fitted into the upper end of the vibrator 5, the cylindrical portion 6b is attached to the vibrator 5 by the screw 11.
It will stick.

One after the other, a threaded plate 8 is inserted into the pipe 5 from the lower end of the opening.
Insert. That is, the screw plate 8 is inserted from the upper end side through the collar member 20 and the engagement hole 19 into the nut member 10 and then into the inside of the helical spring 9 while rotating around the vertical axis. Thereafter or in advance, the connecting member 7 is fixed to the lower end of the screw plate 8 via the support member 14 in the manner described above.

With this, the Kimoto counterbalance mechanism 4 is unitized. When attaching this to a vertical window, attach the mounting seat 6a of the upper mounting member 6 to the upper frame 1b of the sash 1,
The lower connecting members 7 are fixed to the lower frame 3a of the shoji 3 in the manner described above.

According to this wooden counterbalance mechanism 4, even when the screw plate support member 14 is rotated to tighten the helical spring 9 in advance to apply a constant initial spring pressure, and the shoji 3 is pulled up to the highest position, The initial setting is performed so that the abrasion engagement force between the screw plate 8 and the nut member 10 overcomes the weight of the shoji 3 and the shoji 3 does not descend under its own weight.

When the initial centration is performed in this way, the screw plate 8 is pulled out downward by pulling down the shoji 3, and the nut member 10 screwed into the screw plate 8 rotates and gradually tightens the helical spring 9. Spiral spring 9 created by this tightening
The repulsive force causes a stronger frictional engagement between the screw plate 8 and the nut member 10, and this frictional engagement force overcomes the lifting force of the shoji 3 due to the repulsive force of the helical spring 9 and the own weight of the shoji 3, so that the shoji 3 can be moved freely. Support at the top and bottom height positions.

In such a case, the maximum lifting position of the inner shoji 3 can be set higher than before by the amount of intrusion of the screw plate 8 into the cylindrical part 6b of the mounting member 6, which is convenient for cleaning with the outer shoji 3 pulled down. . Naturally, the vertical stroke of the inner shoji 3 can be greatly increased, and the nut member 10 at the lower end of the pipe 5 also rotates in a fixed position without upward movement, so even when the shoji 3 is pulled down to the maximum, the screw The upper end of the plate 8 does not come off from the nut member 10, and in this respect as well, design leeway can be provided.

[Another embodiment example]

The cylindrical portion 6b of the mounting member 6 may have a cylindrical shape through which the center hole 16 passes vertically. Further, the top of the cylindrical portion 6b may be closed.

In the illustrated example, it is assumed that the shoji 3 on the outside side is also supported by the counterbalance mechanism 4, but the shoji 3 may be fixed.

As a means for rotatably supporting the nut member 1o at a fixed position at the lower end inside the pipe 5, the collar member 20 and the engaging claw 10c of the nut member 10 are elastically engaged in the figure, but the detailed structure of these There are no particular limitations on this. Even when using the collar member 2o, the design can be freely changed in how to stop the nut member 10 from being pulled out downward.

[Brief explanation of drawings]

Figures 1 to 4 illustrate the counterbalance mechanism for a lift/lower window according to the present invention, with Figure 1 being a vertical sectional view showing the installation in use, and Figure 2 being a partially cutaway vertical sectional view. , Figure 3 is an exploded perspective view, and Figure 4 is a front view of the vertical window as seen from the indoor side. FIG. 5 is a longitudinal sectional view showing a conventional counterbalance mechanism. 1...Sash, la...Vertical bar, 2...Vertical groove, 4...Counter balance mechanism, 5...Pipe, 6...Installation Components 6a... Mounting seat, 6b... Cylinder part, 7... Connecting member, 8... Threaded plate, 9... Spiral spring, 10... Nut member, 10c... Engaging claw of nut member, 20... Collar member, 20b... Engaging claw of collar member, 21... Engaging groove. Invention Onbinfuji 2nd figure 2nd figure

Claims (1)

[Claims] 1. At least the lower shoji (3) located on the indoor side:
Vertical grooves (
2) In the counterbalance mechanism of a lift window that moves up and down along A connecting member (7) located outside the opening and connected to the lower part of the shoji (3); and a screw plate (8) that is inserted into the pipe (5) and whose lower end is fixed to the connecting member (7). ), a spiral spring (9) located inside the pipe (5), spirally wound around the outer periphery of the threaded plate (8), and having an upper end fixed to the upper end inside the pipe (5); The helical spring (9) is rotatably arranged at the lower end, the lower end of the helical spring (9) is fixed, and the screw plate (8
) is screwed into the nut member (10) in the inserted state, and has a mounting member (6) for attaching the upper end of the pipe (5) to the upper part of the sash (1), and this mounting member (6) , the mounting seat (6a), and the mounting seat (
The cylindrical part (6b) of the mounting member (6) is fitted and fixed to the upper end of the pipe (5), and the mounting seat (6a) is ) is fixed to the top of the sash (1), and the pipe (
5), a spiral spring (
9) The upper end of the threaded plate (8) is fixed, and the upper end of the screw plate (8) can freely spiral into the cylindrical part (6b) when the shoji (3) is pulled up to the uppermost position. A counterbalance mechanism for windows that can be raised and lowered. 2. The counterbalance mechanism for a lift-down window according to claim 1, further comprising means for supporting the nut member (10) at a fixed position at a lower end portion of the pipe (5) so as to be immovable up and down but rotatable.