JP2545137B2 - Electric type roll screen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention locks an upper edge portion of a raw cloth on a take-up pipe and rotates the take-up pipe to wind and unwind the raw cloth. The present invention relates to an electric roll screen adapted to perform.

[Conventional technology]

In this type of electric roll screen, when the raw cloth is unloaded, the weight bar (weight for holding the raw cloth in a taut state) attached to the lower end of the raw cloth comes into contact with the floor surface. Further, if the winding pipe is further rotated in the unwinding direction, the raw cloth is slackened, and the appearance of the roll screen is impaired. Even if such a defect is solved by accurately adjusting the entire length of the raw cloth to the height between the installation position of the take-up pipe and the floor surface, the total length of the raw cloth is thus made into the take-up pipe. The troublesome work of adjusting the mounting position is inevitable.

In addition, if the weight bar hits an obstacle when unwinding the raw cloth, even if the unwinding operation of the raw cloth is stopped at that time, the weight bar leans to the right or left depending on the position of the obstacle. Will lean to. Moreover, if the unwinding operation of the raw cloth is continued even after hitting the obstacle, the raw cloth will inflate greatly while tilting left or right. In this way, if the weight bar at the lower end of the raw cloth hits any obstacle, not only the appearance of the raw cloth of the roll screen is significantly impaired, but also the raw cloth itself or its operating mechanism may be damaged. .

Conventionally, in order to eliminate such drawbacks, an attempt has been made to control the rotation of the winding pipe by providing the weight bar with a limit switch that is operated by hitting a floor surface or an obstacle. However, the signal line connecting the limit switch and the rotation control device hangs down on the window frame, significantly impairing the appearance of the roll screen.

[Problems to be Solved by the Invention]

The present invention eliminates the drawbacks of the conventional roll screen as described above, and when the weight bar attached to the lower end of the raw cloth hits the floor surface or an obstacle, the raw cloth unwinding operation is immediately stopped, and It is an object of the present invention to provide a roll screen in which a signal line connecting a limit switch provided for performing such a stop and a rotation control device does not hang down to the outside of the roll screen and spoil the appearance.

[Means for solving the problem]

As a means for solving the problems in such an electric roll screen, the present invention winds and winds a raw cloth by locking the upper edge of the raw cloth on the winding pipe and rotating the winding pipe. The weight bar attached to the lower end of the raw cloth is operated so that the floor bar or an obstacle comes into contact with the weight bar at the lower end of the raw cloth that is unwound by the rotation of the winding pipe. A switch is provided, the lower end of the signal line provided along the side edge of the raw cloth over substantially the entire length of the raw cloth is connected to the limit switch, and the upper end of the signal line is connected to the winding pipe rotation control device. In the electric roll screen, the winding pipe is composed of a core pipe that is electrically driven and a raw cloth fixing pipe that is fitted and fixed to the outside of the core pipe. The width of the core pipe is shorter than the core pipe by at least a width equal to the width of the signal line attached along the side edge of the raw cloth, and the radius of the core pipe is at least equal to the thickness of the signal line when the raw cloth is wound up. A core pipe portion having a diameter larger than that of the take-up pipe and having a small diameter at the end is rotatably fitted on a fixed bearing shaft, and a ring-shaped fixed-side contact provided on the outer circumference of the bearing shaft. And the rotary sliding contact provided on the inner circumference of the exterior fitting insertion portion of the winding pipe so as to come into contact with each other, and the upper end of the signal line is contacted through the contact between the fixed side contact and the rotary sliding contact. There is provided an electric roll screen characterized in that the part is connected to the winding pipe rotation control device.

If the above-mentioned signal line is composed of a so-called flat cable, the roll screen can be smoothly wound and unwound, and the signal line portion does not become particularly thick in the wound state. In particular, the winding pipe is composed of an electrically driven core pipe and a raw fabric fixed pipe fitted and fixed to the outside of the core pipe,
A state in which the length of the raw cloth fixing pipe is made shorter than the core pipe by at least a width equal to the lateral width of the signal line provided along the side edge of the raw cloth, and the radius of the raw cloth is rolled up. Since the radius of the core pipe is made larger than the radius of the signal line by at least the thickness of the signal line in FIG.

[Work]

In the above configuration, when the raw cloth is unwound and the weight bar hits the floor surface or an obstacle, the unwinding of the raw cloth is stopped immediately.

〔Example〕

 Embodiments shown in the drawings will be described below.

FIG. 1 is a front view showing an embodiment of an electric roll screen according to the present invention, in which 1 is a roll screen raw cloth, 2 is an electric winding pipe, and 3 is a weight attached to the lower end of the raw cloth. Bars 4 are support fittings for supporting the winding pipe.

In the present invention, when the raw cloth 1 is unwound on the weight bar 3 by the rotation of the winding pipe 2, the limit switch 5 is provided which is operated by the weight bar coming into contact with the floor surface or an obstacle (Fig. 2). ). In the illustrated example, limit switches 5 are provided at both ends of the weight bar 3, and an obstacle sensing member 6 that connects the limit switches 5 is provided so that the obstacle sensing member senses the obstacle at any position. You can do it.

A signal line 7 is provided along the side edge of the raw cloth over substantially the entire length of the raw cloth. As the signal line 7, for example, a sheet in which the signal line 7 is preliminarily incorporated may be attached to the side edge of the raw cloth 1 as shown in FIG. 4 (a), or as shown in FIG. 4 (b). Alternatively, signal lines in the form of flat cables may be glued to the edges of the raw cloth 1.

The lower end of the signal line is connected to the limit switch 5 as shown in FIG. 2, and the upper end of the signal line is connected to the take-up pipe rotation control device 8 via a rotary sliding contact described later (see FIG. (Fig. 1). 1 and 9 show an operation switch for opening and closing the control device.

The upper end portion of the signal line and the connection portion for connecting to the rotation control device 8 are provided, for example, as shown in FIG. 2, in a fixed portion composed of a fixed shaft 10 and a contact receiving shaft 11 supported by a support fitting 4. The stationary side contact 12 and the rotating side contact 13 provided on the winding pipe 2 rotatably supported by the stationary portion slide on each other by a spring 14 in a pressure contact state to transmit an electric current. In the figure, 15 indicates a contact adapter.
As described above, the take-up pipe 2 is rotatably supported by externally fitting the contact receiving shaft 11 of the fixed portion, and the fixed side provided on the contact receiving shaft 11 in the portion of the core pipe having a small diameter for external fitting. Since the contact point 12 and the rotary sliding contact point (rotation side contact point) 13 of the take-up pipe 2 contact each other to transmit an electric current, the function of bearing and contact contact can be obtained by one contact point receiving shaft 12, The length of the take-up pipe (width of the raw cloth) is not limited by the outer mechanism, and the length can be set to be long, and the gap between the side edge of the raw cloth and the window frame can be reduced, resulting in an excellent appearance.

As described above, in the present invention, when the weight bar 3 hits an obstacle, this is detected by the limit switch,
The rotation is transmitted to the rotation control device via the rotary sliding contact to control the rotation. In the embodiment shown in FIG. 2, the winding pipe 2 is
It consists of an electrically driven core pipe 2a and a raw cloth fixing pipe 2b fitted and fixed to the outside of the core pipe. The raw cloth is fixed to the raw cloth fixing pipe 2b. The length of the raw cloth fixing pipe 2b is shorter than the length of the core pipe 2a by at least a width equal to the width of the signal line 7, and the radius of the raw cloth fixing pipe 2b is the signal line in a state in which the raw cloth is rolled up. It is larger than the radius of the core pipe 2a by at least a radius equal to the thickness of 7. According to this structure, when the raw cloth is completely wound up, the thickness of the overlapping portion of the signal line is absorbed by the difference between the raw cloth fixing pipe and the core pipe, and the raw cloth is completely wound up. Sometimes, the surface does not have irregularities. Second
In the figure, 16 indicates a weight bar cap, and in FIG. 5, 17 indicates a motor pipe having a built-in motor.

In the illustrated example, limit switches are provided at both ends of the weight bar, and signal lines 7 are attached to both side edges of the cloth, and are connected to the limit switches at their lower ends. The upper ends of these signal lines are gathered at one end and connected to the control device via a rotary sliding contact. In this case, if the weight bar hits the obstacle, the electric circuit in the limit switch is connected and a signal current flows to stop the rotation of the motor. Since the ends are connected in parallel, the lowering of the raw cloth is stopped when any of the limit switches is activated.

〔The invention's effect〕

In the electric type roll screen according to the present invention, when the weight bar comes into contact with the floor surface or hits the obstacle 18 in the middle of the descent of the raw fabric as shown in FIG. 3B, the descent of the raw fabric is immediately stopped. Therefore, not only the appearance of the roll screen is not impaired, but accidents such as damage to the raw cloth or the lifting mechanism are also prevented. Further, a core pipe having a small diameter of the winding pipe is externally fitted and rotatably supported on the contact receiving shaft of the fixed portion, and the fixed side contact and the take-up pipe provided on the contact receiving shaft at the external fitting portion. Since the rotating and sliding contact of the above contacts contact to transmit the electric current, the function of bearing and contact contact can be obtained by one contact receiving shaft, and the length of the winding pipe is not limited by the outer mechanism. It takes a long time and is excellent in appearance.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an electric roll screen according to the present invention, FIG. 2 is a partially cut front view showing a part of the electric roll screen in an enlarged scale, and FIG. Fig. 3 (b) is a partial view showing a state of hitting an obstacle, Fig. 4 (a) (b) is a sectional view of the side edge of the raw cloth, and Fig. 5 is a signal. It is a disassembled perspective view which shows the connection state of the wire upper end part. 1 ... Raw cloth, 2 ... Winding pipe, 3 ... Weight bar, 4 ... Supporting metal, 5 ... Limit switch, 6 ... Obstacle detecting member, 7 ... Signal line, 8 ... Control device .

Claims (1)

(57) [Claims] 1. An upper edge portion of a raw cloth is locked to a take-up pipe, and the take-up pipe is rotated to wind and unwind the raw cloth, which is attached to a lower end of the raw cloth. The weight bar is provided with a limit switch that operates when a floor surface or an obstacle comes into contact with the weight bar at the lower end of the raw cloth unwound by the rotation of the winding pipe,
An electric roll screen in which the lower end of a signal line provided along the side edge of the raw cloth over substantially the entire length of the raw cloth is connected to the limit switch, and the upper end of the signal line is connected to a winding pipe rotation control device. In the above, the winding pipe comprises an electrically driven core pipe and a raw cloth fixing pipe fitted and fixed to the outside of the core pipe, and the raw cloth fixing pipe extends along the side edge of the raw cloth. A width shorter than the core pipe by at least a width equal to the lateral width of the attached signal line and larger than the radius of the core pipe by a radius at least equal to the thickness of the signal line in a state in which raw cloth is wound up, Further, a core pipe portion having a small diameter at the end of the winding pipe is rotatably externally fitted on a fixed receiving shaft, and a ring-shaped fixed side contact provided on the outer periphery of the receiving shaft and the above-mentioned winding pipe. Provided on the inner circumference of the exterior fitting part The rotary sliding contact is provided so as to be in contact with the rotary sliding contact, and the upper end of the signal line is connected to the winding pipe rotation control device through the contact between the fixed contact and the rotary sliding contact. Electric type roll screen.