JP2001317277A - Automatic winding type screen device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate regulation of a winding speed or a winding force of an automatic winding type screen device. SOLUTION: A drive regulating shaft 25 supporting a winding shaft 7 of a screen 5 is supported rotatably by a bracket 3A provided at one end of a winding box 1. One end of a coil spring 29 is connected to the drive regulating shaft 25, while the other end of the spring is connected to the winding shaft 7. An engaging part 25b engageable with and disengageable from a rotation checking member 35 provided at the bracket 3A is formed at the shaft end part of the drive regulating shaft. A drive regulating part 25c for regulating the winding speed of the screen by adjusting the strength of the coil spring 29 by engaging and rotating it by an engaging tool such as a driver when the rotation checking member 35 is disengaged from the engaging part 25b is provided at the end face on the shaft end part side of the drive regulating shaft 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen device for dust protection, light shielding, heat insulation, insect control, etc. More specifically, the present invention relates to a screen device for disassembling a screen device without removing a winding shaft. The present invention relates to an automatic winding type screen device capable of easily adjusting a winding speed or a winding force.

[0002]

2. Description of the Related Art Conventionally, a screen is wound around a winding shaft driven by a coil spring, and an operation frame for opening and closing operation is attached to the end of the screen to automatically wind up the screen. Is widely known. Generally, this type of automatic winding type screen device is configured to adjust the rotational biasing force of a coil spring incorporated in a winding shaft by adjusting the strength of the torsion of the coil spring. To adjust the winding speed or the winding force.

However, in the above-mentioned conventional screen device, the adjustment of the coil spring cannot be performed from the outside of the winding box. Therefore, the screen device is disassembled once and the winding shaft is fixed to the spring. It is necessary to adjust the strength of the torsion of the coil spring after removing it, and then reassemble, so that the work is very troublesome and requires skill. In addition, when the adjustment of the coil spring is not properly performed, the above operation must be repeated each time, and it is desired to facilitate the adjustment of the screen winding speed and the like.

[0004]

A technical object of the present invention is to provide a screen device in which a screen is wound around a winding shaft driven by a coil spring and the screen is automatically wound. An automatic winding device in which the winding speed or the winding force of the screen device can be easily adjusted by adjusting the strength of the torsion of the coil spring by an external operation without disassembling the device. An object of the present invention is to provide a portable screen device.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an automatic winding type screen device of the present invention winds a rotation biasing force caused by a torsion of a coil spring built in a winding shaft around which the screen is wound. And an operation frame for opening and closing operation is attached to the end of the screen so as to open and close the screen, and a bracket at one end of the winding box is provided with a drive adjustment protruding from the winding shaft. One end of the shaft is rotatably supported, and within the winding shaft, one end of the coil spring is fixed to the drive adjustment shaft, and the other end of the coil spring is attached to a coil spring receiver fixed to the winding shaft,
On the drive adjustment shaft, an engaging portion for suppressing rotation of the coil spring due to the rotational urging force is formed so as to be freely disengageable with a rotation suppressing member provided on the bracket,
A locking tool is engaged with the shaft end of the drive adjustment shaft for adjusting the rotational urging force of the coil spring by rotation of the drive adjustment shaft when the rotation suppressing member is disengaged from the engagement portion. A drive adjustment unit is provided.

[0006] The engaging portion has a groove-shaped notch formed on both sides of the cylindrical surface of the drive adjustment shaft, and the rotation suppressing member is provided on a single metal plate so as to be mutually connected to the engaging portion. It is preferable that the drive adjusting portion is formed by cutting a slit which is removably engaged, and the drive adjusting portion is formed with a concave groove for locking a driver at a shaft end of the drive adjusting shaft. It is appropriate to do.

In the automatic winding type screen device having the above-mentioned structure, the drive adjusting portion of the drive adjusting shaft is locked by a tool such as a screwdriver, and the rotation of the drive adjusting shaft is inhibited from rotating by the bracket while the drive adjusting shaft is disabled. By disengaging the member, the engagement of the drive adjustment shaft with the engagement portion is released, and in that state, the drive adjustment shaft is appropriately rotated with a tool such as the screwdriver to adjust the strength of the torsion, and then again. The rotation urging force of the coil spring can be adjusted by fixing the engagement portion of the drive adjustment shaft with the rotation suppressing member. Therefore, the strength of the torsion of the coil spring can be easily adjusted by an external operation without disassembling the screen device, thereby easily adjusting the winding speed or the winding force of the screen. be able to.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a self-winding screen apparatus according to the present invention; FIG. 1 shows an embodiment in which the present invention is applied to a dust-proof screen device for an opening of a serving truck used for distributing meals. In addition, the automatic winding type screen device of the present invention is not limited to the dustproof screen of the catering vehicle described above, and can be applied to applications such as light shielding, heat insulation, and insect repellency at the opening of a building.

As shown in FIGS. 1 to 4, the dustproof screen device according to this embodiment includes left and right brackets 3 of a take-up box 1 attached to an upper frame of an opening of a serving car.
A and 3B rotatably support a take-up shaft 7 for winding the screen 5 by the biasing force of the spring and a guide shaft 8 for guiding the screen 5 to be led out. Opening 1 for deriving
a, and an operation frame (bottom bar) 9 is attached to the tip of the screen 5 led out from the opening 1a. The operation frame 9 is provided with a suction tool 11 made of a magnet having a suction surface on a lower surface side thereof, and the suction tool 11 is attracted to a ferromagnetic metal plate such as an iron plate (not shown) provided on a lower frame of the serving car. By doing so, the screen 5 is always stretched in a tensioned state, and both ends of the operation frame 9 are
Along the both sides of the stretched position of the screen 5, the guide is guided by guide rails 15 made of aluminum, stainless steel, or the like, which are arranged on the side frame of the serving car.

Further, the screen 5 is shown in FIGS.
As shown in FIG. 5, in order to support the width-adjustable state without sagging in the width direction at the time of the extension, an engaging member 17 is attached along both left and right end portions, and the engaging member 17 is attached to the left and right guide rails. The inner rail 19 is engaged with an inner rail 19 movably fitted in the inner rail 15. The engaging member 17 is constituted by providing a number of engaging elements 17b which engage with the inner edge of the slit 19a of the inner rail 19 along one side edge of the tape 17a made of cloth or synthetic resin. The other side edge of the tape 17a is connected to the screen 5. The engagement member 17 needs to be able to be wound together with the screen 5. For example, one of the halves of the slide fastener to be joined to each other or a member equivalent thereto can be used as it is. .

As shown in detail in FIGS. 1 to 3, the winding shaft 7 has side caps 21A and 21B at its both ends.
And the side caps 21A, 21A
B is rotatably supported on the brackets 3A and 3B by a drive adjustment shaft 25 and a support shaft 26, respectively. The screen 5 is configured to be automatically wound by disposing an automatic winding unit 23 described later in which the side cap 21 </ b> A is a part of the inside of the winding shaft 7. . The automatic winding unit 23
Can be disposed on either side of the side caps 21A and 21B, and is not limited to the side cap 21A on the left side of the winding box 1 as in this embodiment.
It can be arranged on the side cap 21B on the right side.

As shown in detail in FIGS. 1 and 4, the automatic winding unit 23 has a drive adjusting shaft 25 rotatably mounted on the side cap 21A in the winding shaft 7 and an E.
A coil spring receiver in which one end of a coil spring 29 is fixedly connected to the drive adjustment shaft 25 and the other end of the coil spring 29 is fixed to the winding shaft 7 while being prevented from moving in the axial direction by a ring 27. 31 is fixedly connected. A guide rod 33 for guiding the coil spring 29 is provided between the support portion 25a of the drive adjustment shaft 25 and the support portion 31a of the coil spring receiver 31 inside the coil spring 29.
Is rotatably supported at one end thereof.

As shown in FIG. 1, the drive adjusting shaft 25 is provided with an engaging portion 25b near the shaft end protruding from the side cap 21A, and is provided between the engaging portion 25b and the bracket 3A. The rotation prevention member 35 disposed is engaged with each other as described in detail below,
The rotation of the drive adjustment shaft 25 due to the rotational urging force of the coil spring 29 is suppressed.

In other words, the engaging portion 25b is provided in each of FIGS.
As shown in FIG. 7, a concave groove-shaped notch is formed on both sides of the cylindrical surface of the drive adjustment shaft 25.
As shown in FIGS. 7 and 8, one metal plate is bent into a substantially L-shape, and the one
By forming a slit 35a for suppressing the rotation of the drive adjustment shaft 25 by mutual engagement with the shaft 35, it is formed in a substantially U-shape. Thus, the above coil spring 2
As shown in FIGS. 1 and 9 in detail, a rotation urging force in a direction in which the screen 5 is automatically wound is applied to the screen 9.
The rotation preventing member 35 is fitted through a hole 3a drilled on the upper surface of the bracket 3A, and the slit 35a is engaged with the engaging portion 25b of the drive adjusting shaft 25, so that the rotation of the coil spring 29 is rotated. The rotation of the drive adjustment shaft 25 due to the urging force is suppressed.

Further, the drive adjustment shaft 25 has a groove formed on the shaft end protruding from the side cap 21A for adjusting the rotational urging force of the coil spring 29 by the rotation of the drive adjustment shaft 25. Is provided. The drive adjusting portion 25c is for locking with a flathead screwdriver or a corresponding locking tool to disable rotation of the drive adjustment shaft 25. In a state where the adjustment shaft 25 is disabled for rotation, Bracket 3A above
By disengaging the rotation restraining member 35 from the engagement, the engagement of the drive adjustment shaft 25 with the engagement portion 25b is released, and in this state, the drive adjustment portion 25c is properly adjusted with a locking tool such as a flathead screwdriver. By rotating the screen 5 in the reverse direction, the rotational urging force of the coil spring 29 is adjusted, and thereby the winding speed or the winding force of the screen 5 is adjusted.

The groove in the drive adjusting section 25c is not limited to the above-mentioned slotted screwdriver and the like, but can be locked by a screwdriver or the like.

The self-winding screen device having the above-mentioned configuration locks the drive adjusting portion 25c of the drive adjusting shaft 25 with a locking tool such as a screwdriver so that the rotation of the drive adjusting shaft 25 is disabled. By detaching the rotation inhibiting member 35 from the bracket 3A, the engagement between the slit 35a of the rotation inhibiting member and the engaging portion 25b of the drive adjusting shaft 25 is released, and in this state, the engagement of the driver or the like is performed. The rotation urging force of the coil spring 29 can be adjusted by appropriately rotating the drive adjustment shaft 25 with a stop tool and adjusting the strength of the torsion. Therefore, the strength of the torsion of the coil spring 29 can be easily adjusted by an external operation without disassembling the screen device, and thus the winding speed or the winding force of the screen device can be easily adjusted. be able to.

[0018]

As described above in detail, according to the automatic winding type screen device of the present invention, the strength of the torsion of the coil spring can be easily adjusted by an external operation without disassembling the screen device. Thereby, the winding speed or winding force of the screen device can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a partially broken front sectional view showing an embodiment of an automatic winding type screen device according to the present invention.

FIG. 2 is a partially broken plan sectional view of the same.

FIG. 3 is a left side view of the same.

FIG. 4 is an explanatory view showing an automatic winding unit.

FIG. 5 is an enlarged front view showing a drive adjustment shaft.

FIG. 6 is a sectional view taken along line AA of FIG.

FIG. 7 is an enlarged front view showing a rotation suppressing member.

FIG. 8 is a sectional view taken along the line BB in FIG.

FIG. 9 is an explanatory view showing a mode of engagement and disengagement of the rotation suppressing member.

[Explanation of symbols]

 1 Winding Box 3A, 3B Bracket 3a Hole 5 Screen 7 Winding Shaft 9 Operation Frame 25 Drive Adjusting Shaft 25a Support 25b Engaging 25c Drive Adjusting 26 Support Shaft 29 Coil Spring 31 Coil Spring Receiver 35 Rotation Suppression Member 35a slit

Claims (3)

[Claims] The present invention relates to a screen for winding a screen, wherein a rotation urging force of a coil spring built in a winding shaft for winding the screen is used as a driving source for winding the screen, and an operation frame for opening and closing operation is attached to a tip of the screen. An automatic winding screen device that opens and closes a screen, wherein a bracket at one end of a winding box rotatably supports one end of a drive adjustment shaft protruding from the winding shaft. In the above, one end of the coil spring is fixed to the drive adjustment shaft, and the other end of the coil spring is mounted on a coil spring receiver fixed to the winding shaft, and the drive adjustment shaft is rotated by the urging force of the coil spring. An engagement portion for suppressing the rotation is formed so as to be freely disengageable with the rotation suppressing member disposed on the bracket, and is provided at a shaft end of the drive adjustment shaft. A drive adjusting unit that locks the locking tool for adjusting the rotational urging force of the coil spring by rotation of the drive adjustment shaft when the rotation suppressing member is disengaged from the engagement unit. Features automatic winding screen device. 2. The rotation control member according to claim 2, wherein the engaging portion is formed with a groove-shaped notch on both sides of a cylindrical surface of the drive adjusting shaft.
2. The automatic winding type screen device according to claim 1, wherein a slit is formed in one metal plate so as to be removably engaged with the engaging portion. 3. The drive adjusting section according to claim 1, wherein the drive adjusting shaft is formed by forming a groove at a shaft end of the drive adjusting shaft to lock a driver as a locking tool.
The automatic winding screen device according to 1.