JPH11229733A - Support structure for sheet winding shaft for sheet shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To support a winding shaft over an entire length and reduce the diameter thereof by rotatably holding the winding shaft in a groove formed on a storage case, together with a sheet wound around the winding shaft. SOLUTION: A winding shaft 3 is laid at the upper part of the opening of a building, and used to wind vin and out a sheet having a seat plate 7 at the forward end as a weight, thereby opening and closing the opening of the building. The winding shaft 3 is fitted and rotatably supported into a groove 8 formed on the bottom of a storage case, together with the wound sheet. Furthermore, the winding shaft 3 is connected to a drive motor 6 via a chain, and a deflection preventing tensioner is used for coping with the fluctuation of the center axis 12 of the winding shaft 3. In this case, the groove 8 is formed out of a bottom piece 9 having a low frictional surface layer 14, a forward inclination piece 10 and a backward inclination piece 11. Also, the storage case is suspended via a hanger bolt for preventing the deflection thereof. As a result, the winding shaft 3 can be held with the groove 8 over the entire length and the diameter of the shaft 3 can be made small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seat shutter,
More particularly, the present invention relates to a structure for supporting a winding shaft for winding a sheet in a wide sheet shutter.

[0002]

2. Description of the Related Art A seat shutter can open and close the frontage by winding and rewinding a sheet around a shaft provided in a storage case above the frontage. Although both ends of the take-up shaft of the sheet are supported, if the width of the front end is increased, the take-up shaft is inevitably lengthened, and only the support at both ends increases the bending. Of course, by increasing the outer diameter of the winding shaft or increasing the thickness of the shaft, the secondary moment of area can be increased to prevent the deflection, but the increase in the outer diameter increases the size of the storage case. This is not desirable in the design of the building, as it requires a large space for the ceiling.

In view of the above, in the related art, a support roller may be disposed in some places as a measure for preventing the winding shaft from being bent. However, the provision of the support roller increases the size of the storage case. Japanese Patent Application Laid-Open No. 8-21168 discloses a "sheet winding shaft storage case" which is a conventional technique in which the shaft receiving rollers are provided in some places. Similarly, the "refractory sheet winding type movable curtain" disclosed in Japanese Patent Application Laid-Open No. 7-328138 also has supporting rollers arranged at various places to prevent the winding shaft from bending.

[0004]

As described above, the conventional structure for supporting the sheet take-up shaft of the seat shutter has the above-described problem, and the problem to be solved by the present invention is this problem. Accordingly, the present invention provides a support structure for a sheet take-up shaft of a seat shutter which does not bend even with a long take-up shaft used for a wide sheet shutter and does not make the storage case large.

[0005]

A support structure for a sheet take-up shaft according to the present invention uses a long take-up shaft corresponding to the width of a frontage, and this take-up shaft is not supported at both ends thereof. The shaft is supported on a receiver. The receiver supports the take-up shaft over its entire length and at the same time positions the take-up shaft.

[0006] The position of the central axis of the take-up shaft changes according to the take-up length of the sheet. Rotate without. Also, the receiver can be flat, but in this case, guide grooves are provided on both sides,
It is also possible to adopt a structure in which shafts projecting from both sides of the winding shaft are loosely fitted in the guide grooves. The drive motor is connected to the drive motor via a flexible shaft or a flexible joint. And near the winding shaft, there is an entrance through which sheets are taken in and out.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The winding shaft is supported by being fitted in a groove extending over its entire length, so that the winding shaft itself does not bend. The cross-sectional shape of the groove is not particularly limited, but may be a substantially V-shaped or trapezoidal groove, or any groove that can wind and rewind the sheet by fitting and rotating the winding shaft. On the other hand, when the winding shaft is supported on a flat plate instead of the groove, a guide groove is provided for positioning the winding shaft. A guide groove is formed in a guide portion which is mounted on both sides of the winding shaft, and a shaft extending to both sides is loosely fitted in this guide groove. The shape of the guide groove is formed along the locus of the central axis that changes as the sheet is wound around the winding shaft.

[0008] The winding shaft is in contact with the receiver, and the sheet wound with the rotation of the winding shaft repeats sliding contact with the receiver. Appropriate surface treatments may be applied to prevent significant friction and to avoid scratching the sheet. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0009]

FIG. 1 is an overall schematic view of a seat shutter.
(A) is a front view, and (b) is a side view. Guide rails 1, 1 are attached to both sides of the frontage, and the seat 2 moves up and down along the guide rails 1, 1. A winding shaft 3 for winding and rewinding the sheet 2 is provided above the frontage, and the winding shaft 3 is housed in a storage case 4.

An entrance 5 is formed below the storage case 4 and above the guide rail 1 so that the winding shaft 3
The sheet 2 rewound from the outlet exits from the entrance 5 and descends along the guide rails 1, 1. A drive motor 6 is attached next to the storage case 4 and the winding shaft 3
Can be rotated by the drive motor 6.

Since the winding shaft 3 is supported by being fitted in the groove, its outer diameter increases or decreases according to the length of the sheet to be wound, and as a result, the central axis of the shaft changes. Since the center axis is changed in this manner, the drive motor 6 and the take-up shaft cannot be connected via a chain in a state where the sprocket is directly attached to one end of the take-up shaft, and a flexible shaft or a sprocket is provided between the take-up shaft and the sprocket. Interpose a flexible joint.

Alternatively, if the sprocket is directly attached to the end of the take-up shaft, a countermeasure may be provided by providing a tensioner device for preventing deflection in the chain wound between the sprocket of the drive motor and the sprocket of the take-up shaft. I can do it. A seat plate 7 having a predetermined weight is attached to a lower end (front end) of the seat 2, and the front end of the seat 2 is opened and closed with a predetermined tension without a tab.

FIG. 2 is an embodiment showing the sheet winding structure of the present invention, and shows a cross section thereof. Reference numeral 3 in the figure denotes a winding shaft, which is fitted in the groove 8.
The groove 8 is relatively shallow, and only a part of the winding shaft 3 is fitted, but is not detached from the groove 8 with rotation. That is, the groove 8 supports the winding shaft and has a positioning function.

A groove 8 is formed in the bottom of the storage case 4, and the groove 8 comprises a bottom piece 9, a front inclined piece 10 and a rear inclined piece 11,
When the entire length of the sheet is wound on the winding shaft 3 and has a maximum diameter (two-dot chain line in the figure), the sheet is supported in contact with the bottom piece 9, the front inclined piece 10 and the rear inclined piece 11. In this case, the center axis 12a of the winding shaft 3 is located at the upper side as shown by the alternate long and short dash line. Of course, the seat plate 7 is located at the upper end, and when the winding shaft 3 is rewound by the drive motor 6, the seat plate 7 descends and the seat 2 closes the frontage.

When the frontage is completely closed, the sheet 2 is hardly wrapped around the winding shaft 3, the outer diameter is reduced as shown by the solid line, and the bottom piece 9 and the front inclined piece 10 come into contact with each other. I have. Of course, the position of the center axis of the winding shaft 3 moves downward to the position shown by 12b.

As described above, the winding shaft 3 is not supported at both ends by the bearing, but is fitted in the groove 8, and the bottom piece 9, the front inclined piece 10 and the rear inclined piece 11 Make friction contact. Therefore, a surface layer 14 made of a material that suppresses the friction so that the friction is minimized and smooth rotation is obtained and the sheet 2 is not scratched during rotation is provided. The surface layer 14 is made of a polished metal plate such as stainless steel or a resin coating material. Further, in this embodiment, the groove 8 is constituted by the bottom piece 9, the front inclined piece 10 and the rear inclined piece 11, but may be a substantially V-shaped groove.

The groove 8 is formed over the entire length of the winding shaft 3, but need not necessarily be a connected groove. That is, it is sufficiently possible to prevent the bending of the winding shaft 3 by providing and supporting the grooves 8 in places. Further, the groove 8 shown in the figure can be formed by welding to the storage case 4, but it may be screwed so that the contact portion can be replaced when it is worn.

In the embodiment shown in FIG. 1, the groove 8 having a positioning function is used as a receiving shaft of the winding shaft 3. However, if the center shaft 12 is projected to both sides to be loosely fitted in the guide groove, the winding shaft 3 may be used. The take shaft 3 can also be supported by being placed on a flat plate. In this case, the guide groove is provided in a guide portion attached to the storage case 4 and the shape thereof is
Is formed along the trajectory of the central axis 12 which changes by winding.

By the way, the winding shaft is supported over the entire length, so that a relatively thin shaft is used, and a structure in which a plurality of shafts are connected can be employed. As a result, since the shaft itself becomes lighter, the storage case can also be configured as a split type, which facilitates manufacture, transportation, and carrying in. The storage case is suspended by the suspension bolts 13, 13... So that the storage case itself does not bend by supporting the winding shaft. As described above, the support structure of the sheet take-up shaft of the present invention is provided with a groove and is fitted and supported in the groove, and the following effects can be obtained.

[0020]

The take-up shaft supporting structure of the present invention has a structure in which a receiving portion such as a groove is formed at the bottom of the storage case and is supported by being placed on the receiving portion. No bending occurs, no matter how long the shaft is. Therefore, the winding shaft can be made relatively thin, and as a result, the storage case becomes compact and can be attached even if the ceiling has a narrow space.

Further, since the shaft is mounted on the receiver and rotates without bending, there is no problem such as failure of the bearing part, and the maintenance-free sheet shutter is obtained. Further, since no bending moment acts on the winding shaft, a plurality of short shafts can be connected to each other, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view of a seat shutter according to the present invention, in which (a) is a front view and (b) is a side view.

FIG. 2 is an embodiment showing a winding shaft support structure.

[Description of Signs] 1 Guide rail 2 Seat 3 Winding shaft 4 Storage case 5 Doorway 6 Drive motor 7 Seat plate 8 Groove 9 Bottom piece 10 Front inclined piece 11 Rear inclined piece 12 Center shaft 13 Hanging bolt 14 Surface layer

Claims (6)

[Claims] In a structure for supporting a winding shaft for winding and rewinding a sheet for opening and closing a frontage by elevating and lowering, a receiver is formed at a bottom of a storage case for storing the winding shaft. The center of the take-up shaft is extended on both sides of the take-up shaft, and the center shaft is extended and loosely fitted into the guide groove formed in the guide section attached to the storage case. Support structure for the sheet winding shaft. 2. A structure for supporting a winding shaft for winding and rewinding a sheet for opening and closing a frontage by raising and lowering movement, wherein a groove is formed at a bottom of a storage case for storing the winding shaft. A support structure for a sheet take-up shaft of a seat shutter, wherein the shaft is fitted and supported. 3. The groove comprises a bottom piece, a front inclined piece, and a rear inclined piece, and when the entire length of the sheet is wound around the winding shaft and the outer diameter becomes large, the bottom piece, the front inclined piece, and the rear inclined piece. 3. A support structure for a sheet take-up shaft of a seat shutter according to claim 2, wherein said support member is in contact with and supported by said piece. 4. The take-up of the groove or the like is formed over the whole length of the take-up shaft.
A support structure for a sheet take-up shaft of the sheet shutter described in the above. 5. A support structure for a seat wind-up shaft of a seat shutter according to claim 1, wherein said receiving portion such as said groove is formed at various places of said wind-up shaft. 6. A surface layer having a low frictional force and a wear-resistant surface layer is provided on the surface of the groove where the winding shaft and the sheet wound around the winding shaft are in contact. A support structure for a sheet take-up shaft of a seat shutter according to claim 4.