JP4460938B2 - Ball chain disengagement prevention guide for window opening and closing device using ball chain - Google Patents

Description

    The present invention relates to a ball chain disengagement prevention guide provided on an upper surface of a driving sprocket of a window opening / closing device using an endless ball chain.

    A conventional window opening and closing device has a kick damper attached to each of the continuous windows, a frame pulley and a shoji pulley are arranged, one end of the wire rope is fixed, and the other end has a winding drum. The window is closed by winding the wire rope by operating the handle with the opening and closing device, and the latch of the winding drum is released by pressing the push button provided on the window opening and closing device and the window is opened quickly by the damper. The type that occupies the mainstream.

    These have been mainly used for smoke exhaust devices, but recently there is a demand for opening a few windows at high places for office and indoor ventilation, and these demands are gradually increased from factory use to office use. It is changing to. Therefore, a window opening / closing operation device that is manually operated using a ball chain provided with a window opening / closing operation device at a high position near the window for shortening the construction period, ease of installation, and design matching in the office (Patent Document 1, Patent Document 2) ) Has been provided.

  Japanese Patent No. 3480026 gazette FIG.   Japanese Patent No. 3485354 gazette FIGS. 1 and 2

    The window opening / closing operation device (hereinafter referred to as the window opening / closing device) installed at a high place must be able to be installed in both the vertical and horizontal directions due to the mounting position, and manually using a ball chain. In order to operate, the ball chain often comes off from the ball chain sprocket as it is, and it has been necessary to devise prevention of detachment.

    Patent Document 2 describes one of the breakthroughs, and a ball chain sprocket in which an endless ball chain is disposed in a cover that is provided through the drive shaft of the window opening and closing device is installed. Regardless of the direction in which the operator for opening and closing the window is attached to the handle shaft, it is constructed so that the opening always faces downward for drooping due to the weight of the ball chain. The device was made such as never going off.

    However, when the winding speed of the endless ball chain is increased, this cover is tensioned on the pull side and pulled almost linearly, but the ball chain on the other side is pulled up while loosely swinging, and the ball chain sprocket Due to the centrifugal force caused by the rotation, the ball chain tends to swell toward the outer periphery, and the ball chain immediately contacts and collides with the cover to make a loud noise. The present invention has been provided for the purpose of solving such disadvantages.

  The present invention solves this inconvenience by separating the main body cover of the window opening and closing device and the cover of the ball chain sprocket that also serves to prevent the ball chain from coming off, and further largely removing the contact portion with the bulging portion of the ball chain. That is, the present invention is, in part, a window that is opened and closed by operating a ball chain by connecting a ball chain sprocket to a drive shaft of a window opening and closing device with a body cover that opens and closes the window. In the opening / closing device, there is a gap smaller than the ball outer diameter of the ball chain along the upper surface of the base plate provided between the main body cover surface of the window opening / closing device and the ball chain sprocket attached to the drive shaft and the ball chain sprocket. The base plate is integrally formed with an eaves part for preventing the ball chain from coming off, and the base plate is provided with a rotatable through hole at the drive shaft center of the window opening / closing device regardless of the mounting direction of the window opening / closing device. Can be mounted so that the center of the eaves is always at the top of the ball chain sprocket It is formed and fixed to the main body cover, and both ends of the eaves part are above a horizontal plane passing through the drive shaft center, and an endless ball chain is pulled at a predetermined speed to rotate the ball chain sprocket forward and backward. The ball chain disengagement prevention guide for the window opening and closing device using the ball chain, wherein the ball chain is in a position where the ball chain does not contact.

    Further, in the window opening / closing apparatus in which a ball chain sprocket is connected to a drive shaft of a window opening / closing apparatus with a body cover for opening / closing a window, an endless ball chain is provided, and the window is opened / closed by operating the ball chain. A base plate is provided on one or both sides of an eaves portion for preventing the ball chain from coming off along the upper surface of the ball chain sprocket so as to have a gap smaller than the ball outer diameter of the ball chain. The center of gravity is set so that a rotatable through hole is provided at the center and the center of the eaves is always at the upper position of the ball chain sprocket, and both ends of the eaves are above the horizontal plane passing through the drive axis. The ball chain sprocket is rotated forward and backward by pulling the endless ball chain at a specified speed. Boruche window opening and closing apparatus using a ball chain, characterized in that in the position in which the ball chain is not in contact be - a down off prevention guide.

    Furthermore, one is a shape in which the endlessly configured ball chain is pulled beyond a predetermined speed and the ball chain does not catch on the end of the guide even if the ball chain collides with the end of the eaves. A ball chain disengagement prevention guide for a window opening / closing device using a ball chain.

    In these cases, the ball chain is suspended by its own weight regardless of whether the window opening / closing device is installed vertically or horizontally, and depending on the attachment position, the rotation direction of the drive ball chain sprocket can be either forward or reverse. Therefore, it is desirable that the ball chain disengagement prevention guide to be shared in all positions always be in a position directly above, and symmetrical.

    As the pulling speed of the endless ball chain exceeds the specified speed, the ball chain on the loose side swells toward the outer periphery due to the centrifugal force caused by the rotation of the ball chain sprocket, and eventually the end of the ball chain disengagement prevention guide. Collide with the part. At this time, the connecting shaft that connects the balls of the ball chain may be caught by the end of the guide and cut. Therefore, the shape that does not catch on the end of the guide means, for example, a shape in which the thickness of the guide end is set to a thickness that does not allow the connecting shaft to enter, or the shape is not rounded but rounded. .

    The ball chain detachment prevention guide according to the present invention can easily position the eaves portion of the detachment prevention guide on the upper side of the ball chain sprocket regardless of the orientation of the window opening / closing device. Even if the wire rope is wound up by pulling one side of the endless ball chain at a predetermined speed, the other loose-side ball chain does not come into contact with the end of the detachment prevention guide, so that no noise is generated even during winding of the wire rope. Further, even if the ball chain is pulled at a predetermined speed or more, the ball chain does not get caught on the end of the prevention guide.

Hereinafter, the ball chain detachment prevention guide of the present invention will be described with reference to the accompanying drawings.
First, the configuration of the first embodiment will be described with reference to FIG. FIG. 1 is a front view of a ball chain disengagement prevention guide according to a first embodiment, FIG. 2 is a front view of a mounting hole of the first embodiment deformed into a long hole, and FIGS. FIG. 6 is a perspective view showing a mounting state of the first embodiment when the is installed in the vertical direction and when installed in the horizontal direction, the arrow indicates the pulling direction of the wire rope provided on the window, and FIG. FIG. 4 is a perspective view when the ball chain sprocket and the endless ball chain are mounted in FIG.

    As shown in FIG. 1, the ball chain disengagement prevention guide 1 according to the first embodiment is composed of a base plate 2 and an eaves portion 3 and is integrally molded. The lower surface side of the eaves portion 3 is three-dimensionally projected from the base plate 2 along the upper surface of the sprocket with a distance obtained by adding a gap smaller than the outer diameter of the ball chain 5 to the outer diameter of the ball chain sprocket 4 indicated by a one-dot chain line. The end portion of the window opening / closing device 6 is symmetrical and intersects with a straight line position about 45 degrees above the horizontal line of the drive shaft 7 with the drive shaft 7 of the window opening / closing device 6 as the center. The curve on the lower surface of the both ends of the eaves is longer than the pitch between the balls so that when the ball chain 5 is wound at a predetermined speed or more, the connecting shaft between the balls does not get caught even if it collides with the reaction. It is provided.

    In the case of the first embodiment, the curved surface is used as a shape in which the ball chain 5 is not caught by the end of the ball chain detachment prevention guide 1, but the thickness is increased without using the curved surface and the thickness is the same as the curved surface. The length may be used, and the shape may be any shape as long as the ball chain 5 does not get caught even if it collides by reaction. In addition, what kind of thing may be sufficient about the upper surface shape of the eaves part 3. FIG. The elevation angle can be reduced by setting the predetermined speed low.

    In addition to the shaft through hole 8, the base plate 2 is provided with four mounting holes 9 at vertical and horizontal positions around the shaft. As shown in FIGS. 3 to 5, the window opening / closing device 6 is installed horizontally in the direction of pulling the wire rope, and the vertical installation occupies most of the installation. The eaves part 3 can be attached to the upper part of the ball chain sprocket 4.

    Further, even if the window opening / closing device 6 has to be installed obliquely by design, as long as the mounting hole 9 is a long hole and the base plate 2 is screwed with two screws as shown in FIG. The eaves part 3 can be attached to the upper part of the ball chain sprocket 4 even at such an attachment angle. FIG. 6 is a perspective view when the ball chain sprocket and the ball chain are mounted.

    As can be seen from FIG. 6, even if the ball chain 5 on one side is pulled at a predetermined speed and the ball chain 5 on the opposite side is slightly relaxed or bulges outward, the ball chain 5 does not come into contact with the end of the eaves 3 and is quiet. No noise is generated, and the ball chain does not come off and is not caught by the end of the prevention guide even when pulled at a predetermined speed or higher.

    Here, the ball chain disengagement prevention guide 1 is directly attached to the main body cover 10, but, for example, a single inset is provided on the back side of the base plate 2, and an inset groove is provided on the main body cover 10 side. The fitting groove portion may be formed so as to be rotatable, and the fitting portion on the back side of the base plate 2 may be fitted and attached to the groove portion, or other mounting and fixing methods may be used.

Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, about the same component as 1st Embodiment, the same number is used and detailed description is abbreviate | omitted.
In FIG. 7, a base plate 2 is provided on one side of the eaves portion 3 and is integrally molded. The base plate 2 is provided with a shaft through hole 8 through which the drive shaft 7 of the window opening / closing device 6 passes. A ball chain disengagement prevention guide 1 which is provided with a counterweight part 11 which is similar to the eaves part 3 in the axially symmetrical position of the eaves part 3 and which is thicker than the eaves part 3 and is heavier than the eaves part 3. Moreover, the both ends shape of the eaves part 3 is manufactured by the method which increased thickness among the description in 1st Embodiment. For this reason, the eaves 3 is always automatically connected to the ball chain sprocket from the center of gravity regardless of the direction in which the window opening / closing device 6 is installed by simply passing the ball chain disengagement prevention guide 1 through the drive shaft 7 of the window opening / closing device 6. 4 does not come into contact with the end of the eaves portion 3 even when the ball chain is pulled at a predetermined speed, and the ball chain 5 does not come off even when pulled at a predetermined speed or more. 3 is not caught by the end.

    In FIG. 8, base plates 2, 2 are provided on both sides of the eaves portion 3 and are integrally molded. A shaft through hole 8 that penetrates the drive shaft 7 of the window opening / closing device 6 is formed in the base plates 2, 2. Further, the weight below the shaft surface is larger than the weight above the shaft surface, and the center of gravity is located below the drive shaft 7 and on the axis perpendicular. This is a guide 1 for preventing the ball chain from coming off, and the eaves portion 3 is the same as that shown in FIG. Therefore, no matter what direction the window opening / closing device 6 is mounted, the eaves portion 3 always comes to the upper part of the ball chain sprocket 4 automatically by simply passing through the drive shaft 7, and even if the ball chain is pulled at a predetermined speed. Since it does not contact the end portion of the eaves portion 3, it is quiet and has no noise, and the ball chain 5 is not caught on the end portion of the eaves portion 3 of the prevention guide when pulled at a predetermined speed or higher.

Front view of the first embodiment Front view of the mounting hole shown in FIG. Mounting perspective view of the first embodiment when the opening / closing device is installed in the vertical direction Mounting perspective view of the first embodiment when the opening / closing device is installed in the horizontal straight direction Mounting perspective view of the first embodiment when the opening / closing device is installed in the horizontal direction 4 is a perspective view of the ball chain sprocket and the ball chain mounted. Perspective view of the second embodiment Perspective view of another second embodiment 7 is a perspective view when the guide, the ball chain sprocket, and the ball chain of FIG. 8 is a perspective view when the guide, the ball chain sprocket, and the ball chain of FIG. 8 are all attached to the opening / closing device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ball chain removal prevention guide 2 Base plate 3 Eaves part 4 Ball chain sprocket 5 Ball chain 6 Window opening and closing device 7 Drive shaft 8 Shaft through hole 9 Mounting hole 10 Main body cover 11 Counter weight part

Claims (3)

A main body of a window opening / closing device in a window opening / closing device in which a ball chain sprocket is connected to a drive shaft of a window opening / closing device with a body cover for opening / closing a window and an endless ball chain is provided and the window is opened / closed by operating the ball chain. A base plate provided between a cover surface and the ball chain sprocket attached to the drive shaft, and a ball configured to have a gap smaller than the ball outer diameter of the ball chain along the upper surface of the ball chain sprocket An eaves portion for preventing chain disengagement is integrally formed, the base plate is provided with a rotatable through hole at the drive shaft center of the window opening / closing device regardless of the mounting direction of the window opening / closing device, and the eaves portion of the eaves portion It is formed to be attachable so that the center is always at the upper position of the ball chain sprocket. It is fixed to the body cover, and both ends of the eaves part are above the horizontal plane passing through the drive shaft center, and the ball chain sprocket can be rotated forward and backward by pulling the endlessly configured ball chain at a predetermined speed. A ball chain detachment prevention guide for a window opening and closing device using a ball chain, wherein the ball chain is in a position where the ball chain does not contact. A ball chain sprocket is connected to a drive shaft of a window opening and closing device with a body cover for opening and closing a window, an endless ball chain is provided, and in the window opening and closing device opened and closed by operating this ball chain, the ball chain sprocket A base plate is provided on one or both sides of the eaves portion for preventing the ball chain from coming off, which is configured to have a gap smaller than the ball outer diameter of the ball chain along the upper surface, and the base plate can be rotated about the drive shaft. The center of gravity is set so that the center of the eaves portion is always at the upper position of the ball chain sprocket, and both ends of the eaves portion are above the horizontal plane passing through the drive shaft center and are endless. Even if the ball chain sprocket is rotated forward and backward by pulling the ball chain at a predetermined speed Boruche window opening and closing apparatus using a ball chain, characterized in that a position Ruchen does not contact - down off prevention guide. The endlessly configured ball chain is pulled beyond a predetermined speed, and the ball chain has a shape that does not catch on the end of the guide even if the ball chain collides with the end of the eaves portion. A ball chain disengagement prevention guide for a window opening and closing device using the ball chain according to claim 1 or 2.

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