JPS6016214Y2 - 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 and 4 that move up and down along vertical grooves 3 and 3 that are formed in the vertical frames 2 and 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. 6 is well known.

The upper end of a hollow vibro is fixed in the vertical groove 3, and a screw plate 9 is inserted into the vibro so as to be movable up and down, and a nut member 11, which is screwed onto the screw plate 9, is rotatably housed at the lower end of the pipe. , a spirally wound spring 10 is fitted around the outer periphery of the screw plate 9.
The upper end of this helical spring 10 is connected and fixed to a vibro, the lower end is connected and fixed to a nut member 11, and the glass door 4 is connected to the protruding lower end of the leaf spring 9 via a connecting fitting 12. The spring pressure is set to a constant value by tightening the spring in advance to prevent the glass door 4 from lowering under its own weight when it is raised to the uppermost position.

In this type of counterbalance mechanism, the initial spring pressure of the helical spring 10 cannot be changed or adjusted after assembly.

At the time of assembly, the spring pressure had to be set by rotating the threaded plate 9 via the connecting fitting 12 and tightening the helical spring 10 with the vibro fixed.

Then, while maintaining this state, the vibro had to be fixed to the vertical groove 3, and then the connecting fitting 12 had to be connected to the glass door 4.

Therefore, with the conventional structure, setting the initial spring pressure of the helical spring 10 according to the weight of the glass door is extremely difficult and difficult to ensure. The assembly work for connecting the metal fittings 12 and the glass door 4 also required labor and skill.

This invention eliminates such conventional disadvantages and provides a counterbalance mechanism that allows the above-mentioned initial spring pressure adjustment and assembly work of the helical spring to be easily and reliably performed no matter how different the weight of the glass door is. This is what I am trying to do.

The details will be explained below based on the drawings.

Figure 1 shows a raised/lowered window;
The upper and lower two glass doors 4,4 move up and down along the vertical grooves 3,3 formed in the left and right vertical frames 2,2, and each glass door 4 has a pair of vertical grooves 3,3 formed in the left and right vertical frames 2,3. Counter balance mechanism 5
・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 tube 7 is fixed to the upper end in a penetrating manner, and the vibro is fixed in the vertical groove 3 with a screw 8 inserted through the tube 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 near the upper end of the vibro in a manner described later, and the lower end is set to a length that projects slightly downward from the vibro.

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

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

Reference numeral 12 denotes a connecting fitting that comes into contact with the opening edge of the lower end of the vibro from below, and has an insertion hole 13 through which the screw plate 9 can be freely inserted.The lower end of the spiral spring 1o is fixed to the upper end, and the glass door 4 The lower part of 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.

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

In this way, an initial spring pressure sufficient to support the weight of the glass door 4 is applied to the coil spring 15, and the helical spring 10
A predetermined initial spring pressure is also applied to the spring.

In such a case, the glass door 4 is directly supported and biased upward by the coil spring 15 acting in the direction of the vertical axis.

When the glass door 4 is pushed down against this coil spring 15, the pulling force of the coil spring 15 increases, and the helical spring 10 is tightened, and the repulsive force of this tightens the vertical groove 3 of the glass door.
As a result, the glass door 4 stops at an arbitrary vertical height position.

As shown in FIGS. 3 to 5, the connecting fitting 12 is made up of an outer cylindrical body 12a and a long inner cylindrical body 12b that is freely rotatably fitted into the outer cylindrical body 12a. Cylindrical body 12b
An insertion hole 13 for the screw plate 9 is formed inside the
It is assumed that the lower end of the helical spring 10 is wound and fixed around the outer periphery of the upwardly protruding portion of the inner cylindrical body 12b.

Further, the lower end of the coil spring 15 is wound and fixed around the outer periphery of the upper half of the outer cylinder 12a, and the glass door 4 is attached to the lower half.
The connecting piece 12e connected to the connecting piece 12e can be fixed with screws.

A ratchet-type reversal prevention mechanism 16 is interposed between the inner and outer cylinders 12a and 12b, which allows the inner cylinder 12b to rotate in the tightening direction X of the spiral spring 10 and prevents rotation in the opposite direction. has been done.

This reversal prevention mechanism 16 is configured such that a lock pin 18, which is removably attached to the outer cylinder 12a, is engaged with a pair of inclined claws 17 provided on the outer periphery of the inner cylinder 12b. The lock pin 18 is configured as a headed pin inserted from the outside into the bottom of a groove 19 formed on the periphery of the outer cylindrical body 12a, and a C-shaped leaf spring fitted in this groove 19. 20 prevents extraction, and the lock pin 18
is always held in a locked position in which it is thrust inward.

When the inner cylindrical body 12b is rotated in the X direction, the lock pin 18 and the spring 20 are elastically deformed outwardly by the slope of the pawl 17, and are pressed and retreated outward. As a result, the inner cylindrical body 12b is allowed to be tightened by the helical spring in 180° increments, and the reverse rotation from the tightening position is prevented.

The lock biasing leaf spring 20 always holds the lock pin 18 at C.
Bend part 2 of the other end so as to press near one free end of the letter shape.
0' is locked in a notch 21 formed in a part of the groove 19,
Rotation of the spring 20 within the groove 19 is prevented.

Further, a driver groove 22 for rotational operation is formed at the lower end of the inner cylinder 12b.

Note that the coil spring 15 may be configured as a compression coil spring whose upper end abuts the nut member 11 from below and whose lower end is supported by a vibro, so as to indirectly pull up and urge the connecting fitting 12. .

Further, the coil spring 15 itself may be omitted.

According to the counterbalance mechanism according to the present invention as described above, the initial spring pressure of the helical spring 10 can be easily adjusted according to the weight of the glass door 4.

This spring pressure adjustment may be performed before assembly; in that case, the reverse rotation prevention mechanism 16 will work effectively and the initial spring pressure applied to the helical spring 10 can be reliably maintained, so the counterbalance mechanism can be assembled into the satshu as is. Can be attached.

Furthermore, even after assembly, if the spring pressure is insufficient, it can be easily adjusted strongly.

Furthermore, since the torsional repulsive force of the helical spring 10 is not applied, the work of connecting the connecting fitting 12 and the glass door 4 can be performed extremely easily.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of the whole illustrating the lift/lower window according to the present invention, Fig. 2 is a longitudinal sectional front view of its counterbalance mechanism, Fig. 3 is a longitudinal sectional front view of main parts of the counterbalance mechanism, and Fig. 4. is a sectional view taken along the line A-A in FIG. 3, and FIG. 5 is an exploded perspective view of a connecting fitting, which is one of the structural members of the present invention.
FIG. 6 is a longitudinal sectional front view of a conventional counterbalance mechanism. 1...Satush, 2...Vertical frame, 3...
...Vertical groove, 4...Glass door, 6...
・Hollow pipe, 9...Threaded plate, 10...
・Spiral spring, 11...Nut member, 12...
... Connecting fitting, 12a ... Outer cylinder body, 12b.
...Inner cylinder body, 12c...Connection member, 13
......Insertion hole, 15...Coil spring, 1
6...Reverse rotation prevention mechanism, 17...Claw, 1
8...Lock pin, 19...Groove, 20
...Plate spring, 22...Driver groove.

Claims (1)

[Scope of Claim for Utility Model Registration] In a vertical window with a structure in which the lower glass door 4 located on the indoor side moves up and down along the vertical grooves 3 formed in the left and right vertical frames 2 of the satchel 1, The upper end of the vertical hollow vibro is supported and fixed. A long screw plate 9 with a large lead angle is inserted into the vibro. A helical spring 10 is spirally wound around the outer periphery of the screw plate 9 in the vibro. A nut member 11 that is screwed onto the screw plate 9 is attached to the upper end of the helical spring 10. The nut member 11 is made to be able to rotate freely within the vibro, and the connecting fitting 12 contacts the lower opening edge of the vibro from below.
This connecting fitting 12 has a connecting member 1 attached to the glass door 4.
An outer cylinder 12a connected via 2c, and the outer cylinder 12
The screw plate 9 is inserted into the internal insertion hole 13 of the inner cylinder body 12b, and the lower end of the helical spring 10 is inserted into the upper end protrusion of the inner cylinder body 12b. A means 22 for rotating the inner cylinder body 12b from the outside is provided at the lower end of the inner cylinder body 12b, and the inner cylinder body 12b is tightened with the helical spring 10 between the inner and outer cylinder bodies 12a and 12b. A ratchet-type reversal prevention mechanism 16 that allows rotation in the direction X but prevents rotation in the opposite direction is provided. A claw 17 is provided, and the outer cylindrical body 1
A lock pin 18, whose tip engages with the pawl 17, is inserted into a groove 19 formed around the circumference of 2a, so that the lock pin 18 can move forward and backward, and the leaf spring 20 fitted in the groove 19 pushes the lock pin 18 outward. A counterbalance mechanism for a glass door in a vertically adjustable window, characterized in that it prevents the glass door from falling out and also presses and biases the lock pin 18 into an inwardly protruding position.