JP3310420B2 - Opening / closing device for high windows - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for opening and closing a high window provided at a high place in a building such as a smoke exhaust window.

[0002]

2. Description of the Related Art As a conventional high window opening / closing device, a winding drum provided with a wire connected to a shoji urged to move in a window opening direction is provided at a low place in a building. The window is closed against the urging force by winding the wire around the winding drum by operating the handle, the window is held closed by locking the winding drum, and the winding is released by releasing the lock. 2. Description of the Related Art There is known an apparatus in which a shoji is opened with an urging force while feeding a wire from a drum.

[0003] In the opening and closing operation device of this type, when the window is closed, the winding operation of the handle can be lightened.
At the time of opening the window, it is necessary to take care that the handle does not rotate with the winding drum to prevent danger.

Therefore, conventionally, a large operating force is obtained by connecting the input shaft of the handle and the winding drum via a reduction gear train, and a drive of the input shaft is provided between the input shaft and the winding drum. A one-way clutch that transmits power to the take-up drum but does not transmit drive power from the take-up drum to the input shaft is provided to prevent the handle from rotating together. The provision of the clutch has a disadvantage that the device becomes large.

In such an opening and closing operation device, when the window is closed, the winding drum is locked so as not to rotate in the feeding direction. A lock mechanism is employed in which a lock claw for preventing only the lock is detachably engaged.

Conventionally, as means for returning the lock pawl from being released from the ratchet for opening the window to a state in which the lock pawl is engaged with the ratchet again, for example, a conventional Japanese Utility Model Unexamined Publication No. 2-7-1178 has been used.
As described in Japanese Patent Application Publication No. 7-107, a return claw is provided on the other end side of a lever provided with the lock claw on one end side to engage with a ratchet wheel and prevent only rotation in the winding direction. When the window is opened, the return pawl can be engaged with the ratchet wheel instead of the lock pawl with the swing of the lever, and at the start of the window closing, that is, at the start of the rotation of the winding drum in the winding direction, the ratchet wheel. A lock claw is automatically returned to a position where the lock claw is engaged with a ratchet wheel by pushing a return claw engaged therewith to swing a lever.

However, such a means is such that the return pawl is always engaged with the ratchet while the take-up drum is rotating in the feeding direction while allowing the return pawl to rotate in the feeding direction.
There has been a problem that the returning claws are continuously hit and the resistance of the returning claws is felt.

[0008]

SUMMARY OF THE INVENTION A high window opening / closing device according to the present invention has been completed to solve the above-mentioned problems. The take-up drum, which winds the wire connected to the sash of the high window that is urged and attached, is freely rotatable relative to the input shaft that is rotatably supported on the base in both forward and reverse directions by a handle connected to one end. And a sun gear provided on the other end of the input shaft, a locking tooth on the outer periphery, an internal gear on the inner periphery, and a drum-side ratchet wheel that rotates integrally with the winding drum. The planetary ratchet wheel, which also forms a locking tooth and supports a planetary gear meshing with the sun gear and the internal gear, is juxtaposed. Each locking claw that prevents rotation in only one direction can be switched to engage and disengage with both ratchet wheels. Has a structure in which a click mechanism.

According to a second aspect of the present invention, in the first aspect, the lock mechanism supports the lock claw, and the lever is always urged to swing to a retracted position where the lock claw is disengaged from the both ratchets. Locking the lever against the urging force to hold the lever in an engagement position where the lock claw engages with both ratchet wheels, and
A holding member that is always urged to move in the direction to lock the lever, a release member that moves the holding member against the urging force in a direction to release the locking of the lever, and a fixing member fixed to the input shaft. A return gear, and a driven gear that meshes with the return gear and that is frictionally coupled to the lever on a support shaft of the lever and that is rotatably fitted to the lever, and is rotated in the winding direction of the winding drum. At the beginning, the lever at the retracted position is swingably returned to the engaged position by meshing and frictional coupling between the return gear and the driven gear.

[0010]

The operation and effect of the present invention will be described below. When the input shaft is rotated in the forward direction by the handle when the window is closed, the planetary gear rotates in the reverse direction by meshing with the sun gear, and tries to revolve in the positive direction along the internal gear of the drum-side ratchet wheel. . At this time, the lock pawl of the lock mechanism is engaged with the planetary ratchet that pivotally supports the planetary gear, and its rotation in the forward direction is prevented, so that the drum-side ratchet rotates in the reverse direction, and is integrated therewith. Is rotated in the direction opposite to the winding direction, and the wire is wound.
In this case, the winding drum is rotationally driven at a reduced speed by the gear ratio of the sun gear and the internal gear.

When the rotation of the input shaft is stopped, a lock pawl is engaged with the ratchet wheel to prevent its forward rotation.
Since the rotation of the take-up drum in the feeding direction is prevented, the window is maintained in an arbitrary closed state.

To restore the handle to a predetermined rotational position for storage, it is rotated in the opposite direction. Accordingly, when the input shaft rotates in the reverse direction, the planetary gear rotates in the forward direction and tries to revolve in the reverse direction along the internal gear. In this case, the planetary ratchet is allowed to rotate in the reverse direction, so that the input shaft rotates in the reverse direction while the winding drum is stopped, and the handle is returned to an arbitrary rotation posture.

At the time of opening the window, when the lock claw of the lock mechanism is disengaged from the both ratchets, the take-up drum is allowed to rotate in the forward direction, which is the direction in which the take-up drum is extended, so that the wire is extended and the shoji is urged by the urging force. It is fenestrated.

At this time, the planetary gear only revolves around the sun gear in the positive direction together with the planetary ratchet while engaging with the fixed position of the internal gear of the drum-side ratchet, and the input shaft is rotationally driven. Never. Thereby, the handle connected to the input shaft does not rotate.

That is, according to the first aspect of the present invention, the planetary gear mechanism is employed to reduce the speed of the winding drum when the window is closed and the clutch function for preventing the handle from rotating when the window is opened. Since the power supply can be provided by one, there is an effect that the device can be compactly assembled.

The second aspect of the present invention operates as follows. When the window is opened, when the locking of the lever by the holding member is released by operating the release member, the lever swings to the retracted position, and the lock pawl separates from the both ratchet wheels. Thereby, as described above, rotation of the winding drum in the feeding direction is permitted and the window is opened.

When closing the window, when the input shaft is rotated in the forward direction, the return gear fixed to the input shaft rotates the driven gear on the support shaft of the lever meshed with the input gear, and the driven gear and the lever are rotated. , The lever at the retracted position swings and returns to the engaged position integrally, the lock pawl engages with both ratchet wheels, and the lever is held at the engaged position by the holding member. .

Thereafter, when the rotation of the input shaft is continued, the driven gear idles on the support shaft of the lever, and the winding drum rotates in the winding direction as described above to close the window.

As described above, according to the second aspect of the invention, at the beginning of the rotation of the take-up drum in the take-up direction, the lever supporting the lock pawl is pivotally returned to the engaged position by utilizing friction. Therefore, unlike the case where the conventional return claw is used, when the winding drum rotates in the unwinding direction, there is no engagement with the ratchet wheel, and the hitting sound is generated and the resistance is remembered as in the conventional case. There is an effect that can be prevented.

[0020]

An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2, reference numeral 1 denotes an opening / closing operation box mounted indoors.
A cover plate (not shown) is attached to the upper surface of the handle, and the base end of the handle is rotatably supported on one side in the length direction of the cover plate, and the handle is front and back. It can be stored in a storage groove formed in the cover plate by turning over.

In the box 1, a mounting base 2 in which an upper plate 2b is put on a substrate 2a is fixed. On one side of the base 2 in the length direction, an input shaft 3 having a connection hole 4 formed on an upper end surface thereof, which is connected to a drive shaft provided at a base end of the handle, is rotatably supported. I have. A winding drum 5 that winds a wire connected to a sash urged in the direction of opening a high window (not shown) is fitted on the input shaft 3 so as to be relatively rotatable.

At the lower end of the input shaft 3, a sun gear 7 which forms a part of the planetary gear mechanism is formed. As shown in FIG. 3, a drum-side ratchet 9 having an engaging tooth 10 formed on the outer periphery and an internal gear 11 formed on the inner periphery is formed on the lower surface of the winding drum 5. It is installed so as to be able to rotate integrally.

On the lower surface of the drum-side ratchet wheel 9, locking teeth 10 are similarly formed on the outer periphery, and on the upper surface side, three planetary gears 13 meshing with the sun gear 7 and the internal gear 11 described above.
Are rotatably fitted on the planetary ratchet wheel 12 which is pivotally supported at equal angular intervals.

As shown in FIG. 1, a substantially L-shaped lock lever 15 is provided diagonally on the side of the above-mentioned ratchet wheels 9, 12.
Each of the lock levers 15 is rotatably supported on a support shaft 16 that is rotatably supported by the base body 2. , 12 are respectively supported in a freely swingable manner within a certain angle range, and are always urged in a direction to protrude outward by the elastic expansion force of a spring 19. .

The lock lever 15 is biased clockwise in FIG. 1 by the elastic force of a tension spring 20 mounted between the lock lever 15 and the lower plate 2a of the base 2, as shown in FIG. ,
When the first abutting portion 21 provided on the lock lever 15 hits the stopper 23 erected on the substrate 2 a of the base 2, the swing thereof is restricted, whereby the lock lever 15 is
The locking claw 18 takes a retreat position where the locking claw 18 is separated from the locking teeth 10 of the ratchet wheels 9 and 12.

On the other hand, the swinging of the lock lever 15 in the counterclockwise direction against the elasticity of the tension spring 20 is restricted by the second abutting portion 22 hitting the stopper 23 as shown in FIGS. At this time, the lock lever 15 takes an engagement position where each lock claw 18 engages with the corresponding locking tooth 10 of the ratchet wheels 9 and 12.

When the lock claws 18 are engaged with the ratchet wheels 9 and 12, the clockwise rotation of each of the ratchet wheels 9 and 12 in FIG. 1 is prevented. 18
In addition, a clockwise swing against the elasticity of the spring 19 shown by the chain line in FIG. 5 and a counterclockwise swing by the restoring elasticity of the spring 19 shown by the solid line are allowed to be repeated. .

At a position corresponding to the other extended end of the lock lever 15, a lock portion 26 for locking to the extended end is provided at one end to hold the lock lever 14 at the above-mentioned engaged position. The holding lever 25 is swingably supported about a shaft 27. The holding lever 25 is urged in the clockwise direction in FIG. 1 by the elastic force of the torsion spring 28.

As shown in FIG. 2, a release member having a substantially U-shaped cross section into which the extending portion 29 is inserted is provided on the extending portion 29 opposite to the side where the locking portion 26 of the holding lever 25 is provided. 31 is
Guides 3 provided on the substrate 2a and the upper plate 2b of the base 2, respectively.
2, it is slidable in the front-rear direction crossing the length direction of the holding lever 25.

On the lower surface of the front end of the upper plate of the release body 31, there is provided a contact portion 33 projecting clockwise in front of the extension portion 29 of the holding lever 25. An inclined cam surface 34 is formed at the upper end of the column of the release body 31, and an elongated window hole 35 is formed at a position extending from immediately above the cam surface 34 of the upper plate to the front thereof.

At a position above the release body 31, the release body 3
A release button 36 provided with a pressing portion 37 that fits freely in the front-rear direction within the one window hole 35 is vertically movably fitted along a guide hole 38 formed in the upper plate 2 a of the base 2. A cam surface 39 is formed on the pressing portion 37 so as to match the cam surface 34 of the release body 31. The release button 36 is always urged upward by the elastic force of the compression spring 40 to a certain position shown by the solid line in FIG.

Therefore, the release member 31 is urged forward by the contact portion 33 being pulled by the extension portion 29 of the holding lever 25 oscillated clockwise in FIG. The cam surface 34 is the cam surface 39 of the release button 36.
In such a case, sliding is regulated.

Note that this release button 36 is
, Which can be depressed in conjunction with a window button (not shown) provided on the cover plate.

As shown in FIGS. 1 and 2, a return gear 42 is fitted on the upper surface of the winding drum 5 so as to be able to rotate integrally with the input shaft 3 of the handle. As shown in FIG. 6, a driven gear 43 meshing with the return gear 42 is integrally fixed to the support shaft 16 by fitting a tubular portion coupled to a lower surface thereof. A compression spring 44 is mounted between the driven gear 43 and the base end of the lock lever 15 to frictionally couple the two.

A gear 46 is formed on the outer periphery of the upper flange of the winding drum 5, and the gear 46 is provided on a brake device 48 provided on the upper plate 2a of the base 2 as shown in FIG. Is engaged with the input gear 49.

This embodiment has such a structure, and its operation will be described below. First, a case where the sliding door is closed will be described. For convenience, the description will be made from a state where the lock lever 15 is held at the engagement position shown by the solid line in FIG.

When closing the window, the input shaft 3 is rotated clockwise in FIG. 1 by raising the handle accommodated in the cover plate of the box 1 and rotating it. Then, as shown in FIG. 7A, each planetary gear 13 pivotally supported by the planetary ratchet wheel 12 rotates counterclockwise due to engagement with the sun gear 7 formed on the input shaft 3.

At the same time, the planetary gear 13 revolves clockwise along the internal gear 11 of the drum-side ratchet wheel 9 as shown in FIG. At this time, since the lock claw 18 is engaged with the locking tooth 10 of the planetary side ratchet wheel 12 and its clockwise rotation is prevented, the drum side ratchet wheel 9 is moved as shown in FIG. Rotate counterclockwise.

As a result, the winding drum 5 integral with the drum-side ratchet 9 rotates counterclockwise, the wire a is wound, and the sash is closed. In that case, the winding drum 5
The rotation is driven by being reduced by the gear ratio of the sun gear 7 and the internal gear 11, that is, the window is closed with a small operating force.

When the input shaft 3 rotates, the return gear 42 integral with the input shaft 3 rotates. However, since the lock lever 15 is held at the engagement position, the driven gear 43 is moved between the input shaft 3 and the lock lever 15. Slip and spin.

When the clockwise rotation of the input shaft 3 is stopped,
Since the lock claw 18 is locked to the drum-side ratchet wheel 9 and its rotation in the clockwise direction is prevented, the rotation of the winding drum 5 in the unwinding direction is prevented, so that the take-up drum 5 is maintained in an arbitrary closed state. .

When the handle is stored in the storage groove provided on the cover plate of the box 1 after a certain window closing operation is completed, the handle is rotated counterclockwise so as to match the storage groove. When the input shaft 3 rotates counterclockwise with it, the planetary gear 13 rotates clockwise as shown in FIG. 8A, and moves along the internal gear 11 as shown in FIG. To revolve counterclockwise. In that case, FIG.
As shown in (2), since the rotation of the planetary side ratchet wheel 12 in the counterclockwise direction is allowed, the input shaft 3 rotates counterclockwise while the winding drum 5 is stopped, and the handle is adjusted to an arbitrary rotation posture. Therefore, it is only necessary to turn it upside down and store it in the storage groove.

When the window is opened, the window release button provided on the cover plate of the box 1 pushes down the release button 36 against the elasticity of the compression spring 40 as shown by the chain line in FIG.

Then, the release member 31 is retracted by the engagement between the cam surfaces 34 and 39, and the abutting portion 33 pulls the extending portion 29 of the holding lever 25, whereby the holding lever 2
5 is swung counterclockwise in FIG. 1 against the elasticity of the torsion spring 28. Thereby, the locking of the lock lever 15 is released, and the lock lever 15 swings to the retracted position shown in the chain line in FIG. 1 and FIG. 4 by the elastic force of the tension spring 20.

When the pressing force of the fenestration button is removed, the release button 36 rises and returns with the restoring elasticity of the compression spring 40, and the pulling force of the holding lever 25 is removed.
As shown in FIG. 4, the holding lever 25 swings and returns with the resilience of the lock lever 25, and waits in a state where the locking portion 26 rides on the distal end surface of the lock lever 15.

By the swing of the lock lever 15 to the retracted position, as shown in FIG. 4, the lock claw 18 is disengaged from the locking teeth 10 of the both pawls 9 and 12, so that the take-up drum 5 is extended. The rotation in the clockwise direction is allowed, and the sash is opened by the urging force while the wire a is fed.

At this time, the gear 46 provided on the flange on one side of the winding drum 5 drives the input gear 49 of the brake device 48 to operate the brake device 48, and the shoji is subjected to an impact at the window end. The window is opened quickly with the brake applied to an extent.

Further, the planetary gear 13 is engaged with a certain position of the internal gear 11 of the drum-side ratchet 9 while the planetary gear 12 is engaged.
At the same time, it merely revolves around the sun gear 7 clockwise, and the input shaft 3 is not driven to rotate. Therefore, even if the handle is left out of the box 1 so that it can be rotated, it is left attached.
The handle does not rotate and is safe. Of course, even when the handle is stored in the storage groove, it does not become a load and the feeding of the winding drum 5 is not disabled.

When closing the window again, when the input shaft 3 is rotated clockwise, the return gear 42 fixed to the input shaft 3 engages with the support shaft 1 of the lock lever 15 engaged therewith.
6 is rotated in the counterclockwise direction in FIG. 1, and the compression spring 4 between the driven gear 43 and the lock lever 15 is rotated.
4 causes the lock lever 15 at the retracted position shown by the chain line in FIG. 4 to swing the holding lever 25 counterclockwise against the elasticity of the torsion spring 28 integrally with the driven gear 43. Then, it swings counterclockwise around the support shaft 16 and returns to the engagement position shown by the solid line in FIG. At the same time, the holding lever 25 swings clockwise by the elastic force of the torsion spring 28 and the locking portion 26 is locked, whereby the lock lever 1 is locked.
5 is held in the engaged position.

Thereafter, when the clockwise rotation of the input shaft 3 is continued, the driven gear 43 becomes the support shaft 1 of the lock lever 15.
6, the take-up drum 5 rotates in the take-up direction and is closed as described above.

[Brief description of the drawings]

FIG. 1 is a plan view of a box according to an embodiment of the present invention with a cover plate and an upper plate of a base removed.

FIG. 2 is a cross-sectional view of the embodiment with a cover plate removed.

FIG. 3 is a partially cutaway exploded perspective view showing a part of the planetary gear mechanism.

FIG. 4 is a partial plan view showing a state where a lock lever is at a retracted position.

FIG. 5 is a partial plan view showing a state where a lock lever is at an engagement position.

FIG. 6 is a partial cross-sectional view for explaining an automatic return function of a lock lever.

FIG. 7 is an explanatory diagram of the operation when the window is closed.

FIG. 8 is an operation explanatory view when the handle is stored.

[Explanation of symbols]

2: Substrate 3: Input shaft 5: Winding drum 7: Sun gear 9: Drum side ratchet wheel 10: Locking tooth 11: Internal gear 12: Planetary side ratchet wheel 1
3: Planetary gear 15: Lock lever (lever) 16:
Support shaft 18: Lock claw 25: Holding lever (holding member) 31: Release body (release member) 42: Return gear
43: driven gear 44: compression spring (for friction coupling) a: wire

Claims (2)

(57) [Claims] 1. A winding drum, which winds a wire connected to a sash of a high window attached to a window frame by urging the sash to open, can be rotated in both forward and reverse directions by a handle connected to one end. The input shaft is rotatably fitted to the input shaft, and a sun gear is provided on the other end of the input shaft, and a locking tooth is formed on the outer circumference and an internal gear is formed on the inner circumference. A drum-side ratchet that rotates integrally with the winding drum, and a planet-side ratchet that similarly forms locking teeth on the outer periphery and that supports a planetary gear that meshes with the sun gear and the internal gear are arranged side by side. A locking mechanism is provided in which each of the locking wheels is engaged with the locking teeth of the both ratchets to prevent only rotation in a predetermined one direction, and is capable of switching between engagement and disengagement. An opening and closing operation device for a high window. A locking mechanism which supports the locking pawl and which is always urged to a retracted position where the locking pawl is disengaged from the both ratchets; A holding member which holds the lever at an engagement position where the lock claw engages with the both ratchets against a biasing force, and which is always urged to move in a direction for locking the lever; A release member for moving a member against a biasing force in a direction for releasing the locking of the lever, a return gear fixed on the input shaft, and meshing with the return gear, and supporting the lever; A driven gear that is frictionally coupled to the lever and is rotatably fitted on the shaft, and at the beginning of rotation of the winding drum in the winding direction, engagement of the return gear with the driven gear and Due to the friction coupling, the retracted position 2. The high window opening / closing operation device according to claim 1, wherein the lever is configured to swing back to the engagement position.