JP5242056B2 - Sheet shutter - Google Patents

Description

  The present invention relates to a seat shutter having an improved curtain driving device for raising and lowering a curtain in a vertical direction in a seat shutter for raising and lowering a shutter opening and closing space of a structure such as a building.

4 is a partially cutaway perspective view showing a conventional seat shutter, FIG. 5 is an enlarged sectional view showing a guide rail mounting portion in FIG. 4, FIG. 6 is an enlarged perspective view showing the guide rail in FIG. 5, and FIG. It is an enlarged front view which shows partially the side edge part of the curtain in FIG.
The seat shutter shown in FIG. 4 includes a pair of left and right guide rails (only one guide rail is shown in FIG. 4) 1 disposed on both sides of the shutter opening / closing space of the structure, and upper ends of these guide rails 1. A curtain storage box 2 disposed between the curtain storage box 2, a curtain winding drum (hereinafter simply referred to as a winding drum) 3 disposed in the curtain storage box 2, and the winding drum 3 wound around the winding drum 3. When the take-up drum 3 is rotationally driven, a schematic configuration is provided that includes a sheet-like curtain 4 that moves up and down between the guide rails 1 and an opening / closing device (motor) 5 that rotationally drives the take-up drum 3. (For example, refer to Patent Document 1).

  More specifically, the left and right guide rails 1 are attached to a rail body 6 (see FIG. 1) erected on both sides of the shutter opening / closing space through a rail holder 7 so as to be able to swing in the horizontal direction. ing.

  The left and right guide rails 1 attached in this way are made of a hollow member having a vertically long curtain guide groove 10 on both opposing surface portions. In such a guide rail 1, an access passage 11 (see FIG. 5) located in the vicinity of the curtain entrance / exit of the curtain storage box 2 is notched. The access rail 11 divides the guide rail 1 into an upper rail portion 12 and a lower rail portion 13. The upper rail portion 12 is formed of a rigid member or the like so as not to be elastically deformed, and the lower rail portion 13 is elastically deformable in a direction in which the groove width of the curtain guide groove 10 of the lower rail portion 13 is expanded. It is formed with a member.

  On the other hand, on both side edge portions of the curtain 4, a group of engagement elements 14 for preventing the curtain from being removed (continuous) in a slidable engagement with the inner surfaces of the guide rails 1 (continuous) (FIG. 6). Reference) is provided. Here, when the curtain 4 between the guide rails 1 is greatly bent due to a collision of a work vehicle, a strong wind pressure, a transient external force from any direction in three dimensions due to obstacles, etc. in a factory or the like, The group of engaging members 14 following the curtain 4 presses and elastically deforms the lower rail portion 13 of the semi-elastic member from the inside to come out from the curtain guide groove 10. In addition, a weight 15 (for example, a ballast or the like) 15 is provided below the curtain 4 to ensure the tension of the curtain 4 even when the curtain is rewound by the winding drum 3.

  The engagement element 14 attached to the side edge of the curtain 4 is made of plastic resin and has a rectangular cross-sectional shape that can be accommodated in the curtain guide groove 10. The engaging element 14 is engaged with the edge of the curtain guide groove 10 so as not to be detached from the curtain guide groove 10.

  The curtain drive mechanism for moving the curtain 4 up and down includes an engagement element 14 attached to a side edge of the curtain 4 and a sprocket gear attached to a bearing plate-like bracket of the winding drum 3 above the pair of side rails 1. 16 and a power transmission mechanism 17 such as an electric motor of the switch 5 and a reduction gear.

Next, the operation will be described. Since several of the above-described engaging elements 14 are meshed with the above-described sprocket gear 16, when the opening / closing machine 5 is rotated and the sprocket gear 16 is rotated, the engaging element 14 has an upward or downward force. In addition, the curtain 4 rises upward or descends downward.
The curtain 4 between the left and right guide rails 1 receives an excessive external force during the raising / lowering operation, the fully closed position, the half-open position, and the like. When an excessive traction force in the direction of pulling out the engagement element 14 of the guide rail 1 from the curtain guide groove 10 of the guide rail 1 acts locally, the excessive traction force causes the group of engagement elements 14 to move to the lower rail portion of the guide rail 1. 13 curtain guide grooves 10 are pushed out from the inside and pulled out.

  The curtain 4 detached from the guide rail 1 in this way is wound up by the winding drum 3 by moving the opening / closing machine 5 in the shutter opening direction, and is detached from the lower rail portion 13 of the guide rail 1 in the winding process. The group of engaging elements 14 is pulled into the upper rail portion 12 from the access passage 11. Thereby, the curtain 4 detached from the guide rail 1 automatically returns to the guide rail 1.

Japanese Patent No. 2907554

  In the curtain drive mechanism described above, the engagement element 14 attached to the side edge of the curtain 4 is worn by receiving a driving force from the sprocket gear 16, so that the engagement element 14 or the curtain 4 is removed after a predetermined time. It needs to be replaced. However, the engagement element 14 is made of plastic resin, and the engagement element 14 is fixed at the side edge portion of the curtain 4 without rotating. Therefore, there is a problem that the progress of wear is remarkable.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a sheet shutter that can reduce the wear of a driving engagement element attached to a curtain of the sheet shutter as much as possible.

In order to solve the above-described problems, a seat shutter according to the present invention has a curtain guide groove, a pair of left and right side rails that can be elastically deformed in a direction of widening the groove width of the curtain guide groove, and a pair of these side rails. A sheet-like curtain that has a series of engagement elements slidably engaged with the inner surface at both side edges and that opens and closes between the side rails, and is engaged with the engagement element group to drive the curtain up and down. And a guide block that guides the engaging member group in a predetermined feeding direction between the driving gear and the guide block via the engaging member group engaged with the driving gear. And an endless belt that rotates following the drive gear.

According to the seat shutter of the present invention, since the guide block rotates following the drive gear, the wear of the guide block is reduced and the life of the guide block is extended.

  Hereinafter, a sheet shutter according to the best mode of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view including a column, a side rail, and an engagement element of a seat shutter according to an embodiment of the present invention. 2A is a partially enlarged view of the engagement element provided on the side edge of the curtain, and FIG. 2B is a view of the engagement element of FIG. 2A viewed from the side. FIG. 3 is a partially enlarged view showing a state in which the engagement element is engaged between the drive gear and the guide block. Since the schematic configuration of the sheet shutter is the same as the conventional one, the same components are denoted by the same reference numerals and the description thereof is incorporated.

  In FIG. 1 to FIG. 3, reference numeral 16 denotes a drive gear composed of a sprocket gear, and reference numeral 17 denotes a power transmission mechanism. As shown in FIG. 4, the sheet shutter includes a curtain 4, a winding drum 3 that winds up the curtain 4, a side rail 1 that guides the curtain 4, and an engagement member 14 that is guided by the side rail 1 (see FIG. 3). A drive gear 16 (see FIG. 3) that applies a force in the vertical direction to the engaging element 14, an electric motor (see FIG. 4) of the opening / closing machine 5 that applies a drive force to the drive gear 16, and a driving force of the power transmission mechanism 17 and the drive gear 16 Is provided with a guide block 18 (see FIG. 3) for forcibly engaging the engagement element 14 with the drive gear 16. Reference numeral 8 in FIG. 1 denotes a buffering spring that urges the guide rail 1 in the curtain tension direction via the rail holder 7.

  FIG. 2B shows the shape of the engagement element 14. Each engagement element 14 is formed in a roller shape and has a rotation center axis 14a. The engagement element 14 is rotatable around the rotation center axis 14a. The rotation center shaft 14 a is formed on a base portion 14 b that is fixed to a side edge portion of the curtain 4. The rotation center shaft 14a is fixed to the center portion of the base portion 14b. The engagement elements 14 are attached at regular intervals so as to always mesh with the drive gear 16. The rotation center shaft 14a is oriented in the horizontal direction along the surface of the curtain 4, and the head portion 14c of the rotation center shaft 14a is formed in a collar shape so that the engagement element 14 is not removed. The rotation center shaft 14a may be removable from the base portion 14b so that the engagement element 14 can be replaced, and the base portion 14b and the rotation center shaft 14a may be made of metal.

  FIG. 3 shows the meshing state of the drive gear 16, the engagement element 14, and the guide block 18. The drive gear 16 is disposed at both ends of a shaft that is approximately the same length as the take-up drum 3 provided in the vicinity of the take-up drum 3 in the vicinity of the take-up drum 3, and transmits the rotational torque of the electric motor of the switch 5 to, for example, power transmission. It is transmitted via a reduction gear mechanism of the mechanism 17 or the like. The winding drum 3 winds up the curtain 4 wound up by the rotational force of the driving gear 16 by the biasing force biased in the winding rotational direction, and unwinds the wound curtain 4 by the pulling force of the driving gear 16. Thus, it rotates in conjunction with the rotation of the electric motor of the switch 5. The rotation direction of the drive gear 16 is performed by switching the rotation direction of the electric motor, and the rotation direction of the electric motor is switched by circuit switching of a power supply circuit (not shown). The urging force in the winding direction of the winding drum 3 may be one obtained by converting the gravity of the weight into a rotational force, or may be a spring or the like.

  The guide block 18 is composed of an endless belt in which a reinforcing core material such as a wire is provided in a material such as synthetic rubber, and is formed in an endless belt shape so as to be spanned between a pair of rollers 19. The guide block 18 is attached to the bearing plate of the take-up drum 3 provided on the upper part of the left and right guide rails 1 so as to face the circumferential gear teeth of the drive gear 16. An inner portion of the guide block 18 is supported by a guide roller 20 provided between the pair of rollers 19 so as not to loosen. The guide block 18 presses the engagement elements 14 arranged in the direction along the tooth row of the drive gear 16 so as not to be separated from the drive gear 16.

  The guide block 18 made of an endless belt is formed in a surface shape that meshes with a group of engagement elements 14 meshed with the drive gear 16, and a recess 18 a that holds the engagement element 14 is formed on the belt surface of the guide block 18. It is formed continuously. The concave portion 18 a of the guide block 18 is formed to have a surface shape that meshes with the group of engagement elements 14 that mesh with the drive gear 16, and the portion on the drive gear 16 side of the guide block 18 is in contact with the engagement element 14. As a whole, the inner surface of the recess 18a is brought into surface contact with a portion of the outer peripheral surface of the engaging element 14 that is almost half of the outer peripheral surface, so that the contact pressure is distributed over the entire inner surface of the recess 18a. In FIG. 3, the winding shaft is arranged on the left side of FIG. 3 with the axial direction being the direction perpendicular to the paper surface, and the downward direction is the closing direction of the curtain 4.

  As described above, the sheet shutter of this embodiment has a large number of engagement elements 14 called zippers attached at predetermined intervals on both sides of the sheet-like curtain 4 of the sheet shutter. This engagement element 14 group is inserted between the drive gear 16 and the guide block 18 and meshed with the drive gear 16, and the curtain 4 is moved up and down by the rotation of the drive gear 16 to forcibly open and close the opening 7. The curtain 4 is sent out and sent in.

  According to the seat shutter of this embodiment, when the engagement element 14 attached to the side edge of the curtain 4 is configured to be rotatable, the engagement element 14 is engaged with the drive gear 16 when driven. Rotate. That is, when trying to move the group of the engagement elements 14 along the circumferential rotation locus of the drive gear 16, a force for rotating each engagement element 14 acts on the engagement elements 14. Since the engagement element 14 itself rotates, the force to twist the engagement element 14 is released. Therefore, partial wear of the resin engagement element 14 is alleviated, the life of the engagement element 14 is lengthened, and the failure of the curtain lifting operation is reduced.

  Furthermore, according to the seat shutter of the above-described embodiment, when the engaging element 14 receives a driving force from the driving gear 16 (a driving force in the clockwise or counterclockwise direction in FIG. 3), the engaging block 14 is guided by the guide block 18. Is prevented from being separated from the drive gear 16, so that the engagement element 14 can be moved by receiving the rotational torque of the drive gear 16, and the curtain 4 moves. Since the guide block 18 is composed of an endless belt that rotates following the drive gear 16, the wear of the guide block 18 itself is reduced and the life of the guide block 18 is also extended. Further, since the guide block 18 is constituted by an endless belt, the rotational force of the drive gear 16 is efficiently transmitted to the engaging element 14, and the rotational force of the electric motor 10 is transmitted to the curtain 4, so that the curtain 4 moves up and down smoothly. In addition, the wear of the engagement element 14 and the guide block 18 is reduced as much as possible. Here, the guide block 18 and the engaging element 14 may be made of a resin having high wear resistance and oil resistance.

  In the first embodiment, the case where the guide block 5 is composed of an endless belt that rotates following the drive gear 16 via the engagement element 14 has been described. However, the guide block 18 is engaged with the engagement gear 14 group in the drive gear 16. In the region, the engaging member 14 group is disposed at a position that prevents the engaging member 14 from being disengaged from the driving gear 16, and the arcuate smoothness for guiding the engaging member 14 group to the driving gear 16 side of the guide block 18 is provided. Wearing of the engaging element 14 can be suppressed by providing the guiding surface and rotating the engaging elements 14 individually along the guiding surface.

  The sheet shutter according to this embodiment has been described with respect to a type in which the engagement element 14 is forcibly fed (including forcible feeding) by the rotation of the drive gear 16, but it can also be applied to a type other than the forcible feeding method. . Moreover, although the engaging element 14 was demonstrated as a resin-made zipper, it is also possible to make a zipper metal.

It is sectional drawing which shows the cross-sectional structure of the engaging element and side rail of a sheet shutter concerning embodiment of this invention. (Aa) is the elements on larger scale of the engaging element 14 provided in the side edge part of the curtain of FIG. 1, (B) is a partial side view which shows the side surface structure of FIG. 2 (A). It is an expanded sectional view which shows the meshing state of a drive gear, an engaging element, and a guide block. It is a partially cutaway perspective view of a conventional sheet shutter. It is an expansion perspective view which shows the guide rail in FIG. FIG. 5 is an enlarged front view partially showing a curtain side edge portion in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide rail 2 Curtain storage box 3 Winding drum 4 Curtain 14 Engagement element 16 Sprocket gear 17 Power transmission mechanism 18 Guide block 18a Concave part 19 Pair of rollers

Claims (2)

A pair of left and right side rails having a curtain guide groove and elastically deformable in a direction to widen the groove width of the curtain guide groove, and a group of continuous engagement members slidably engaged with the inner side surfaces of these side rails A sheet-like curtain that is provided on both side edges and that opens and closes between the side rails, a drive gear that meshes with the engagement element group to drive the curtain up and down, and the engagement element group between the drive gears In a sheet shutter including a guide block that guides the
The sheet block is characterized by comprising an endless belt that rotates following the drive gear via a group of engagement members engaged with the drive gear. The endless belt, sheet shutter according to claim 1, characterized in that it is formed to the surface shape meshing with the engaging member group in mesh with the drive gear.

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