JP3367041B2 - Support structure for winding shaft of sheet shutter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a sheet shutter.
(Preferably a fireproof sheet shutter that defines a large opening)
Of the winding shaft, more specifically, it is added to the sheet wound around the winding shaft at the contact point between the winding shaft and the supporting roller on which the winding shaft is mounted. The present invention relates to a support structure for a winding shaft that can improve the durability of the sheet by dispersing and relaxing the load.

[0002]

2. Description of the Related Art A sheet shutter which opens and closes an opening by feeding a sheet wound around a winding shaft and winding the sheet.
In particular, when the is used for a large opening, the total length of the winding shaft becomes large, and there is a problem that the seat weight is largely bent due to the weight of the winding shaft and normal winding cannot be performed. Therefore, Jikkei 3-36370 or Jikkaihei 3-18
As disclosed in Japanese Patent No. 8859, there has been proposed a method in which a winding shaft is supported by a pair of supporting rollers provided below the winding shaft at a predetermined interval in the length direction thereof. There is. Incidentally, the support roller is usually attached to a shutter case or a support arm taken out from the building structure body.

However, in the above-mentioned plan, the winding shaft is provided with a certain bending strength, and then the insufficient strength is supplementarily supported by a pair of supporting rollers.
Las are small diameters and short ones, which are merely provided at discrete intervals in the lengthwise direction of the winding shaft.
The take-up shaft uses a steel pipe of a considerable diameter in order to have a certain strength and is heavy, and a large load is locally applied to the sheet at a position where the support roller and the take-up shaft come into contact with each other. There were wrinkles, breakage of sheet fibers, and scars leading to scratches and perforations. In addition, there was a fear that the slack of the sheet occurred between the supporting rollers.

[0004]

DISCLOSURE OF THE INVENTION The present invention was devised to solve the above-mentioned problems, in which the load acting on the sheet is dispersed and relaxed at the position where the supporting roller and the winding shaft abut. However, it is to improve the durability of the sheet.

[0005]

Means for Solving the Problems] technical means which the present invention is adopted in order to solve the above problems, blanking above the building opening
The winding shaft rotatably arranged through the racket, shea wound on the winding shaft - to open and close the opening by the winding feeding the Sorted - Toshatta - In the above <br/> winding support of the same diameter or larger diameter and the shaft collected by filtration - disposed over substantially the entire length through the bracket La beneath the winding shaft, the winding shaft the support Russia - configured to support La <br / > It is characterized by what you have done. Supporting Russia - la by the set to the same diameter or larger diameter and the winding shaft, the winding shaft support Russia - can be supported in la stable. Further, since the supporting roller is provided under the winding shaft over substantially the entire length, the contact portion between the supporting roller and the winding shaft becomes continuous, and the load on the sheet is dispersed and eased. You can

Preferably, the support roller can be divided into two or more parts. The support roller is divided into two or more in the lengthwise direction, so that the bending in the lengthwise direction becomes extremely small (when the length is divided into two and the total length is halved, the bending strength is 8 times and the bending amount is becomes 1/8), the support Russia - la is maintained in a more horizontal state, the support b - La winding shaft is supported in a more uniform support Russia - La contacts, shea - DOO The load on is further dispersed and relaxed.

Preferably, a support cover is provided between the ends of the divided support rollers so that the support shaft is continuously supported by the divided support rollers and the support cover. Is good. By doing so, the winding shaft can be continuously supported without a gap, and the load on the sheet can be further reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. Figure 1 shows the shutter case
FIG. 2 is an overall front view of the seat shutter in which the seat is omitted, FIG. 2 is a sectional view of the drive unit inside, and FIG. 3 is an enlarged front view of the drive unit. The basic structure of the seat shutter is the left and right ends of the opening. Brackets 12 and 12 provided above the winding shaft 12, a winding shaft 3 rotatably supported by the bracket 12, a sheet 1 wound around the winding shaft 3, and a sheet 1 A seat plate 2 provided at the lower end of the seat 1, an opening / closing device 13 for driving the winding shaft forward and backward, and guide rails 11 standing upright at the left and right ends of the opening for guiding the left and right ends of the seat 1. The opening of the sheet 1 is opened and closed by winding the sheet 1 forward and backward by driving the switch 13 forward and backward, and in the event of a fire, the brake device incorporated in the switch 13 is released by a signal from a fire alarm facility (not shown). The sheet is lowered to close the opening and spread the fire. Intended to prevent diffusion of the smoke, it is of known both. Here, heat-resistant silica cloth is used for the sheet 1, and the shutter case 20 serves as a fireproof compartment for the interior space of the winding shaft and the like.

FIG. 4 is a sectional view of the intermediate bracket portion,
FIG. 5 is a front view of the same roller, and FIG. 6 is a sectional view of the auxiliary roller mounting portion. Below the winding shaft 3, a supporting roller 4 is provided over substantially the entire length thereof. The support roller 4 is divided into two in the length direction by the brackets 12 and 12 and an intermediate bracket 7 provided at the center of the opening width. In the embodiment, the support roller 4 is used.
In the sectional view, the axial center position of the support roller 4 is slightly forward of the axial center position of the winding shaft 3 (the left side of the winding shaft 3 in FIG. 2, that is, the lowered seat 1 is determined). The shutter core side is the front side and the right side is the rear side). The support roller 4 is composed of a steel pipe roller body 4a and shaft necks 4b at both ends. One end of the support roller 4 is rotated to a middle bracket 7 via a bearing 9 and the other end is rotated to a bracket 12 via a bearing 9. It is rotatably supported.

Well supported in the La 4 - [0010] the winding shaft 3 support Russia
To accept , the support roller 4 is at least the winding shaft 3
The diameter of the support roller 4 may be the same as that of the support roller 4 in consideration of the case where the shaft center of the take-up shaft 3 is deviated from the shaft center of the support roller 4. It is preferable that the diameter is larger than the maximum winding outer diameter (the outer diameter including the maximum wound sheet on the winding shaft). Further, the support roller 4 is not limited to one divided into two as shown in the figure, and may be one (support roller having substantially the same length as the winding shaft 3), or three or more. It may be divided. Moreover, although the brackets 12 that are common to the winding shaft are used to support the left and right ends of the opening, separate brackets may be used.

Next, the winding shaft 3, the supporting roller 4, and the sheath.
The relationship of the winding direction of the gland 1 will be described with reference to FIG. The sheet 1 is wound around the winding shaft 3 in the clockwise direction, the lower end side of the sheet passes between the winding shaft 3 and the support roller 4, and the front arc portion (circle) of the support roller 4 (circle). Is connected to the seat plate 2 by descending along the upper left (about 1/4 circular arc portion) of. In the structure shown in FIG. 6, the axis of the winding shaft 3 is offset to the left by Y from the axis of the support roller 4,
The take-up shaft 3 tries to bend in the direction of the arrow B along the circular arc surface of the support roller 4 due to its own weight, but the sheet 1 always tries to descend due to its own weight and the weight of the seat plate. A tensile force acts on the sheet 3 in the direction of the arrow A by the sheet 1, and the sheet 3 is balanced as a whole.

FIG. 8 shows another embodiment showing the relationship between the winding shaft 3, the support roller 4, and the sheet 1 in the winding direction. In this structure, when the winding shaft 3 rotates in the arrow B direction, a rotational force acts on the support roller 4 in the direction of the arrow R'on the contact surface with the winding shaft 3, and the support roller 4 is also fed out. -At the contact surface with the contact point 1, the rotational force acts in the arrow a direction opposite to the arrow b'direction. With respect to this point, in the embodiment shown in FIG. 6, the rotational force applied to the support roller 4 when the sheet 1 is paid out is only in the direction of arrow A, so that it is much more stable than that shown in FIG. The delivered sheet 1 is delivered. Furthermore, a front auxiliary roller 5 described later.
Also, by providing the rear auxiliary roller 6 so as to sandwich the winding shaft 3 from the front and the rear, even when the winding shaft 3 vibrates in the front-back direction due to a sudden opening and closing of the sheet shutter, for example. preparative shaft 3 supported Russia - it can be stably supported by La 4.

Next, a structure for keeping the winding shaft 3 horizontal so that the sheet 1 can be wound and unwound will be described in the case where the supporting roller 4 is divided. In contrast to the conventional structure in which the take-up shaft has a certain amount of flexural strength, and the lack of strength is supplemented by a small-sized support roller, the present proposal provides the support roller 4 with sufficient flexural strength. Is maintained horizontally and the winding shaft 3 is supported thereon. Therefore, the winding shaft 3 does not need to have a bending strength, and may have a diameter necessary for winding the sheet 1. Further, since the support roller 4 has a structure in which the support roller 4 is divided and arranged,
For example, even if it is divided into two, the bending strength is 8 times and the bending amount is 1/8, so that the necessary strength can be easily secured. The bending strength of the sheet winding mechanism is not a winding shaft (the entire opening width has to be configured with one shaft because the sheet is wound), but a support roller that can be divided.
The diameter of both the winding shaft 3 and the supporting roller 4 can be reduced by adopting a structure in which the roller (the sheet can be divided because the sheet is not wound around the supporting roller) can be divided. You can Further, the diameter of the winding shaft 3 is reduced, and the weight is reduced, so that the load on the sheet 1 at the portion where the support roller 4 and the winding shaft 3 contact each other can be further reduced.

Next, the structure of the intermediate bracket 7 will be described. As shown in FIG. 7A, the intermediate bracket 7
Is a hanging plate portion 7a having an inverted L-shape in cross section and a pair of crab-shaped shaft mounting plates 7b, 7 protruding from the lower center of the hanging plate portion so as to face each other.
An inverted L-shaped connecting plate 7c for connecting between b is welded and fixed. The intermediate bracket 7 is welded and fixed to the structural body 100 via the mounting member 110.
Here, since the height dimension of the shaft mounting plate 7b is set to be equal to or less than the outer diameter dimension of the support roller 4, as in the conventional small-sized support roller, an extra height dimension for the pedestal metal fittings is provided. Is unnecessary, and it is convenient for considering the height of installation. The mounting member 110 is formed by appropriately machining and mounting a steel material such as equilateral angle steel in the field, and various shapes and the like are adopted.

A resin support cover 8 having a J-shaped cross section and substantially the same width as that of the intermediate bracket 7 is superposed on the connecting plate 7c so that its flat portion is superposed on the connecting plate 7c. It is attached so as to cover the plate 7b. By providing the support cover 8 between the end portions of the divided support rollers 4, the winding shaft 3 is continuously supported by the support roller 4 and the support cover 8 without a gap. Therefore, the load acting on the sheet can be further dispersed and reduced. The tip portion of the support cover 8 has an arc portion of about 120 degrees, and the outer shape thereof is formed into an arc having a size substantially the same as or slightly smaller than the outer diameter of the support roller 4. The sheet 1 is satisfactorily guided during the unwinding and winding.

The front auxiliary roller 5 and the rear auxiliary roller 6 described above.
Will be described. The front and rear auxiliary rollers 5 and 6 are provided so as to face each other so as to sandwich the winding shaft 3 from the front and back, and a plurality of front and rear auxiliary rollers 5 and 6 are arranged at appropriate intervals in the length direction of the winding shaft. The front auxiliary roller 5 and the rear auxiliary roller 6 are composed of a short roller and a U-shaped pedestal metal that rotatably supports the roller, and the front auxiliary roller 5 is the winding roller. The rear auxiliary roller 6 is provided at a horizontal position of the take-up shaft and at a position slightly lower than the take-up shaft maximum winding outer diameter. Further, the front and rear auxiliary rollers 5 and 6 are provided so as to surround the take-up shaft 3 by opening downward with a substantially U-shaped section provided at appropriate intervals in the longitudinal direction of the take-up shaft 3. It is attached to the auxiliary roller support plate 50. Auxiliary low
The la support plate 50 is welded and fixed to the structural body 100 at an appropriate position via a mounting member. Front auxiliary roller 5
Are removably screwed to the auxiliary roller support plate 50 via the front support base 51. When installing this device,
The winding shaft 3 is attached with the front auxiliary roller 5 and the front support base 51 removed.

Further, the method of connecting the intermediate bracket 7 (or the bracket) and the support roller 4 is as follows. For example, as shown in FIG.
The bearing may be built in the support rollers, and the gap between the support rollers may be further reduced. Also,
Like the support roller 4, the front auxiliary roller 5 and the rear auxiliary roller 6 may be arranged over substantially the entire length of the winding shaft 3, and the diameter thereof may be the same as that of the support roller. The diameter may be selected.

[0018]

According to the invention described in claim 1, the supporting roller is
By providing over La underneath surface substantially the entire length of the winding shaft, supporting the winding shaft b - contact points between La becomes continuous,
The load on the sheet can be dispersed and relaxed. Support roll
La By was the same diameter or larger diameter and the winding shaft, the winding shaft support Russia - can be supported stably with La.

According to the second aspect of the invention, since the supporting roller is divided into two or more parts, the bending of the supporting roller in the longitudinal direction becomes extremely small (the total length is divided into two and the total length is 1 / When it becomes 2, the bending strength is 8 times and the bending amount is 1/8), the supporting roller is maintained in a more horizontal state, and the winding is supported by the supporting roller and the supporting roller. The load is evenly contacted with the take-up shaft to further disperse and relax the load on the sheet.

According to the third aspect of the present invention, a support cover is provided between the end portions of the divided support rollers to cover the support portions of the end portions, and the divided support rollers and the support rollers are provided. Since the take-up shaft is supported continuously with the support cover , the take-up shaft can be continuously supported without a gap, and the load on the sheet can be further reduced.

[Brief description of drawings]

FIG. 1 is a sheet shutter in which a shutter case is omitted.
The whole front view of.

FIG. 2 is a sectional view of a drive unit in a housed state.

FIG. 3 is an enlarged front view of a drive unit.

FIG. 4 is a sectional view of the intermediate bracket portion in a retracted state.

FIG. 5 is a front view of the same delivery.

FIG. 6 is a sectional view of the auxiliary roller mounting portion in a fully assembled state.

FIG. 7A is an overall perspective view of an intermediate bracket. (B)
The whole perspective view of a support cover.

FIG. 8 is an explanatory view of the winding direction of the sheet and the rotation of the support roller.

FIG. 9 is a front view showing another example of a method of connecting the intermediate bracket and the support roller.

[Explanation of symbols]

1 Sheet 3 Winding Shaft 4 Support Roller 5 Front Auxiliary Roller 6 Rear Auxiliary Roller 7 Intermediate Bracket 8 Support Cover

Claims (3)

(57) [Claims] 1. A coil is wound above a building opening through a bracket.
Preparative shafts rotatably arranged, shea wound on the winding shaft - by winding feeding bets open and close the opening sheet - Toshatta - in, the same diameter or larger diameter and the winding shaft support Russia - bra La beneath the take-up shaft
It disposed over substantially the entire length through the socket, the winding shaft the support Russia - sheet characterized by being configured to support La - Toshatta - support structure of the winding shaft. 2. A support structure for a winding shaft of a sheet shutter according to claim 1, wherein the support roller is divided into two or more parts. 3. A support cover for covering a support portion of the end support is provided between the ends of the support rollers divided, and the support roller divided and the support cover are divided. A support structure for a winding shaft of a sheet shutter, wherein the winding shaft is continuously supported by and.