JP2651704B2 - Window opening spring device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window opening spring device, and more particularly to a window opening spring device suitable for a smoke exhaust / ventilation window in which a window is prevented from fluttering in a gust of wind.

2. Description of the Related Art As shown in FIG. 10, a window opening spring device used for a smoke exhaust / ventilation window generally has a frame 1 and an upper edge which are attached to the outside and are protruded outward so that the window can be opened. A pair of spring devices 3 and 3 are mounted between the window sash 2 and a plurality of guide rollers 4 mounted on the frame 1 and the window sash 2, and a wire 5 is wound around the winding box 6 of the wire 5. It is connected to the handle 7.

To open the window (during smoke exhaustion or ventilation), the release push button 8 of the winding box 6 is operated to unlock the winding drum (not shown) in the winding box 6, and the window drum 2 is wound with the winding drum. Is slowly released by the resistance of the wire 5 and the braking force of the take-up box 6 while pulling the wire 5 drawn out from the wire.

The window is opened by pressing a reset button 9 provided on the take-up box 6 and operating the take-up handle 7 to take up the wire 5 around the take-up drum. Keeps the window closed.

A spring device 3 used in such a smoke exhaust / ventilation window device is called a stay damper or the like as shown in FIG. 11, and stores a single compression spring 11 in a spring case 10. The repulsive force is used to obtain the pushing force on the pushing shaft 12.
The frame 1 and the window shoji 2 are fixed by a base end 13 of a spring case 10 and an angle 14 attached to an extrusion shaft 12.

In this conventional spring device 3, when the window is opened, the compression spring 11 does not act against the pushing force in the window closing direction and the drawing force in the window opening direction caused by the window shoji 2 being blown by the wind. It was designed to absorb the impact force of these winds against only the repulsive force.

[Problems to be Solved by the Invention] However, the conventional spring device 3 cannot cope with a sudden compression state caused by a gust, and the wind pressure cannot be absorbed by the compression springs 11. There is a problem that a state called fluttering is caused, which causes disconnection due to the impact of the wire 5 and glass breakage of the window sash.

Means for Solving the Problems A window opening spring device according to the present invention has been made in view of the above-mentioned conventional problems, and is freely inserted into an extrusion shaft movably connected to a compression spring in a spring case. A shock absorber which is moved forward and backward together with the pushing shaft is interposed between the compression spring and the pushing shaft.

The shock absorbing device includes a brake piece in which a plurality of sliding pieces form a tapered opening that is inclined outward and open outward, and each sliding piece is movable in the opening radial direction of the spring case. A brake ring having a tapered outer surface shape corresponding to the inner wall surface of the opening, one end of which is loosely inserted into the opening of the brake piece and the other end of which is brought into contact with a step provided on the extrusion shaft; When a pressing force of a predetermined value or more is interposed between the brake piece and the brake ring and receives a pressing force of a predetermined value or more from the brake ring, one end of the brake ring further enters the opening of the brake piece to cause the plurality of sliding pieces to slide. And a tension spring for setting a braking force to slide the inner surface of the spring case in contact with the inner wall surface of the spring case.

Further, the shock absorbing device has a brake piece having a tapered opening which is attached to the open end of the spring case and which is inclined outwardly outward, and a taper corresponding to the inner wall surface of the opening of the brake piece by a plurality of sliding pieces. A brake ring having an outer surface shape, which is loosely inserted into the opening of the brake piece and whose other end is brought into contact with a step provided on the extrusion shaft, and the brake piece and the brake ring And when the brake ring receives a pressing force equal to or more than a predetermined value from the brake ring, it bends to cause the brake ring to further enter the opening of the brake piece, thereby causing the plurality of sliding pieces to expand and move to form the brake. It is also possible to use a tension spring for setting a braking force which is slidably in contact with the inner wall surface of the opening.

The extruding shaft is connected via a fixing bracket attached to the compression spring, and the fixing bracket is provided with a projection for guiding the movement of the sliding piece, and the sliding piece is provided with a long hole for inserting the projection. It may be.

Further, the inner shape of the opening of the brake piece and the outer shape of the brake ring may be frusto-conical.

Further, the number of the compression springs may be plural, and the tension spring may be a plate spring having a spherical shape.

Example An example of the present invention will be described below with reference to the drawings. In the following, portions common to those of the related art are denoted by common reference numerals, and redundant description will be omitted.

1 to 6 show an embodiment of the present invention.
Spring case 22 containing three compression springs 21
The compression shaft 21 and the extrusion shaft 23 are connected to each other via the shock absorber 20. The extrusion shaft 23 is urged by a compression spring 21 so as to extend outward.

When multiple compression springs are used, the difference in spring force between compression and expansion is reduced compared to the case of a single compression spring. It can be reasonably reasonable.

The spring case 22 has a flat rectangular tube shape, and has a rectangular bottom plate 26 provided with an attachment piece 25 to the frame 1 at the end, and a lid plate of the same shape provided with an opening 27 through which the extrusion shaft 23 is inserted.
28 is attached and formed. Mounting piece 25 provided on bottom plate 26
The mounting hole 25a is eccentric from the axis Z of the spring case 22 by a distance A as shown in FIG.

The extrusion shaft 23 is connected to the spring 21 by screwing a screw portion 29 at the tip into a screw hole 31 of a fixing bracket 30 also serving as a spring receiver, and the vertical dimension H of the window shoji 2 (FIG. 5).
The size of the protrusion from the spring case 22 can be finely adjusted or exchanged in accordance with the size. The other end of the ring portion 32 is attached to the window shoji 2. The extrusion shaft 23 has substantially the same shape as that of the conventional one, but has a step portion 23a slightly separated from the screw portion 29 inserted into the spring case 20.

As shown in FIG. 5, the mounting piece 25 of the spring case 22 is attached to the frame 1 and the window shoji 2 by attaching the mounting piece 25 of the frame 1 to the vertical frame 1a of the frame 1.
At the same time, the ring part 32 of the extrusion shaft 23 is
To each other with screws or the like, and the upper frame 1b of the frame 1
The extruded window sash 2 can be opened and closed about a mounting point C with the window sash 2 provided in the vicinity.

Generally, in this type of window device, the pushing force of the pushing shaft 23 required for opening the window shoji 2 is not only the weight of the window shoji 2 but also the attachment point B of the spring device to the frame 1 and the attachment of the window shoji 2 to the frame 1. It is determined by the horizontal distance X from the point C. In this embodiment, the horizontal distance X is set to the spring case 22.
The mounting hole 25a is made eccentric to increase the required pushing force.

The shock absorber 20 includes a brake piece 33, a brake ring 34, and a tension spring 35.

The brake piece 33 is composed of a pair of sliding pieces 36, 36, and a truncated conical taper that is inclined to open toward the open end side of the spring case 22, that is, toward the cover plate 28, by a recess provided in the sliding piece 36. An opening 37 is formed. Each sliding piece 36 is provided with a long hole 38, and a projection 39 provided on the fixing bracket 30 is fitted into the long hole 38, and the sliding piece 36 extends in a direction orthogonal to the axis Z, that is, the spring case 22. It is movably held in the radial direction.

The brake ring 34 includes a body 40 having a truncated conical outer surface shape corresponding to the opening 37 of the brake piece 33, and a flange 41 provided on the large diameter end side of the body 40, and extends along the axis. A hole 42 for inserting the extrusion shaft 23 is formed. The body portion 40 has an end on the small diameter side loosely inserted into the opening 37 of the brake piece 33. The hole 42 has a larger diameter than the portion between the screw portion 29 of the extrusion shaft 23 and the subsequent step portion 23a. For this reason, the extrusion shaft 23 is connected to the spring case 22.
In this state, the step 23a of the extrusion shaft 23 and the flange 41 of the brake ring 34 are in contact with each other.

The tension spring 35 has a spherical outer shape, and a body 40 of the brake ring 34 is inserted into an opening 43 provided at the center.
The brake ring 33 is interposed between the brake piece 33 and the brake ring 34 to abut the flange 41 of the brake ring 34 to urge the brake ring 34 toward the lid 28 of the spring case 22. . The spring constant of the tension spring may be appropriately determined, but when the window shoji 2 is slowly closed, the pushing force by the flange 41 of the pushing shaft 23 is balanced without bending together with the frictional force of the brake ring, and the pushing is performed. The shaft 23 is suddenly retracted into the spring case 22, and the step portion 23a is determined to bend when a strong pressing force is applied by strongly pressing the flange portion 41 of the brake ring. The tension spring is not limited to the shape shown in the figure, and may be, for example, a helical spring. However, when the tension spring is made as shown in the figure, a spring that urges against the brake ring is used. It is possible to make the force and the pressing force received from the flange portion of the brake ring uniform.

In the window using the spring device according to the present embodiment, the opening and closing operation is performed in the same manner as in the related art. However, in a state where a gust or the like blows when the window is opened and the window shoji 2 flaps conventionally, The operation state of the spring device as described above occurs.

That is, when the window sash 2 is pushed in the window closing direction by wind or the like and the pushing shaft 23 is suddenly operated to retract into the spring case 22, the step portion 23a of the pushing shaft 23 is strongly Press. As a result, when a pressing force of a predetermined value or more is applied to the tension spring 35 via the brake ring 34, the tension spring bends and the brake ring 34 is pushed into the opening 37 of the brake piece 33. Then, the sliding piece 36 of the brake piece 33 is expanded by sliding contact with the body 40 of the brake ring 34, and moves so as to be in sliding contact with the inner wall surface of the spring case 22. This sliding piece
The return force of the extrusion shaft 23 is absorbed by the frictional force generated by the sliding contact between the window case 36 and the spring case 22.
Closes slowly.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the following, portions common to the related art and portions common to the previous embodiment are denoted by common reference numerals, and redundant description will be omitted.

The shock absorber 50 of this example includes a brake piece 51, a brake ring 52, and a tension spring 35 common to the previous embodiment.

The brake piece 51 is fixed to the back side of the lid plate 28 of the spring case 22, and has a frusto-conical tapered opening 54 that is inclined outward and open.

The brake ring 52 includes a pair of sliding pieces 55, 55.
The pair of sliding pieces 55, 55 each have a semi-truncated conical outer shape, and a body 56 having a frusto-conical outer surface shape corresponding to the opening 54 of the brake piece 51, Extrusion shaft along the flange with flanges 57, 58 at both ends of 56
A hole 59 for inserting the 23 is formed. The body portion 56 has an end on the small diameter side loosely inserted into the opening 54 of the brake piece 51.
The diameter of the hole 59 is larger than the diameter of the extrusion shaft 23, and the end on the smaller diameter side of the hole 59 is substantially the same diameter as the diameter of the extrusion shaft 23. Therefore, when the push-out shaft 23 is attached to the spring case 22, the push-out shaft 23 comes into sliding contact with the inner wall surface at the small-diameter side end of the brake ring 52.

The tension spring 35 allows the body 56 of the brake ring 52 to be loosely inserted into the opening 43 provided
It is interposed between the lid 28 of 22 and the brake ring 52,
The brake ring 52 contacts the flange 57 of the brake ring 52
Is urged outward. In the drawing, reference numeral 60 denotes a C ring, which prevents the brake ring 52 from coming off.

Also in the window using the spring device according to the present embodiment, the opening and closing operation of the window shoji 2 is performed smoothly by absorbing the sudden return force of the push-out shaft 23 by frictional force even when a gust or the like blows as in the previous example. Is made.

That is, when the window sash 2 is pushed in the window closing direction by wind or the like, and the pushing shaft 23 is suddenly operated to retract into the spring case 22, the pushing shaft 23 and the brake ring
The frictional force with the inner wall on the smaller diameter side of 52 makes the brake ring 52
When a pressing force equal to or more than a predetermined value is applied to the tension spring 35 via the lever, the tension spring 35 is bent, and the brake ring 52 is pushed into the opening 54 of the brake piece 51. Then, the body 56 of the brake ring 52 comes into sliding contact with the inner wall surface of the brake piece 51. The return force of the pushing shaft 23 is absorbed by the frictional force generated by the sliding contact between the brake ring 52 and the brake piece 51, and the window shoji 2 closes slowly.

[Effect of the Invention] As described above, the window opening spring device according to the present invention is configured such that the extrusion shaft inserted from the end opening of the spring case is connected to the compression spring in the spring case so as to be able to advance and retreat. In a window opening spring device mounted between a window sash and a frame, a buffer device that is loosely inserted into the extrusion shaft and moves back and forth with the extrusion shaft is interposed between the compression spring and the extrusion shaft, or Because it was made to intervene at the open end of the spring case, even under a state where the window shoji would flutter if a gust or the like blows at the time of opening the window, conventionally,
The sliding force between the brake piece and the inner wall surface of the case or the sliding force between the brake piece and the brake ring absorbs the return force of the extrusion shaft, allowing the window shoji to slowly close the window. This has the effect that problems such as flapping and breakage of glass do not occur.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention, FIG. 2 is a partially enlarged cross-sectional view showing the operation of the shock absorber in a state where the extrusion shaft is not performing an abrupt operation, and FIG. FIG. 4 is a partially enlarged cross-sectional view showing the operation of the shock absorber when the extrusion shaft is rapidly operated. FIG. 4 is a cross-sectional view of an assembled state of the embodiment of FIG. 1, and FIG. FIG. 6 is a cross-sectional view showing a state in which the push-out shaft is mounted on a spring case, FIG. 7 is an exploded perspective view showing a second embodiment of the present invention, and FIG. 7, a partially enlarged sectional view corresponding to FIG. 2 in the example of FIG. 7, FIG. 9 is a partially enlarged sectional view equivalent to FIG. 3 of the example in FIG. 7, and FIG. 10 shows the entire configuration of the window device. FIG. 11 is a perspective view, and FIG. 11 is a sectional view of a conventional spring device. 1: Frame, 2: Window shoji 20, 50: Shock absorber, 21: Compression spring 22: Spring case 23: Extrusion shaft, 25: Mounting piece 28: Cover plate, 30: Fixing bracket 33, 51: Brake piece 34, 52 : Brake ring 35: Tension spring 36, 55: Sliding piece, 37, 54: Open 38: Slot, 39: Projection 60: C ring A: Eccentric distance

Claims (2)

(57) [Claims] 1. A compression spring in a spring case,
A window opening spring device in which an extruding shaft inserted from an end opening of the spring case is connected so as to be able to advance and retreat, and is mounted between a window shoji and a frame. A device is interposed between the compression spring and the extruding shaft, and the shock absorbing device forms a tapered opening which is opened outward and inclined by a plurality of sliding pieces. A brake piece movable in the radial direction of the opening of the case, and a tapered outer surface shape corresponding to the inner wall surface of the opening of the brake piece, one end of which is loosely inserted into the opening of the brake piece and the other end of which is extruded. A brake ring that is brought into contact with a step provided on the shaft, and a pressing force that is interposed between the brake piece and the brake ring and that has a predetermined pressure or more from the brake ring. A tension spring for setting a braking force, which bends when received and further enters one end of the brake ring into the opening of the brake piece, expands and moves the plurality of slide pieces and slides on the inner wall surface of the spring case. A window opening spring device, comprising: 2. A compression spring in a spring case,
A window opening spring device which is connected between an extruding shaft inserted from an end opening of the spring case so as to be able to advance and retreat and is mounted between a window shoji and a frame body. The shock absorber has a tapered opening attached to the open end of the spring case and having a tapered opening that is inclined outwardly and a plurality of sliding pieces. A brake ring having a tapered outer surface shape corresponding to the inner wall surface of the opening, and being loosely inserted into the opening of the brake piece and having the inner wall surface of the sliding piece slidably in contact with the extrusion shaft; and the brake piece and the brake ring. And when it receives a pressing force of a predetermined value or more from the brake ring, it bends and moves the brake ring further into the opening of the brake piece. A window opening spring device comprising: a tension spring for setting a braking force for moving the plurality of sliding pieces into the open state and slidingly contacting the inner wall surface of the opening of the brake piece.