JPS631171Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a screen winding device.

Conventionally, in order to prevent the spread of cold air in refrigerated cases containing foodstuffs and to improve the insulation properties of building windows during heating and cooling, rollable insulating screens have been placed around the openings of cases and windows. It is common practice to set up It is necessary for this type of screen to be able to hold it in a half-open state, and therefore, in a conventional screen winding device, as shown in FIG. A spring 3 is interposed between the screen and a freely supporting bearing member 2, and the biasing force of the spring 3 provides resistance to the winding shaft 1, so that the screen can be held in any open/close position. However, not only does resistance tend to vary from product to product, but if the distance between the left and right bearing members 2 is increased due to installation location, the winding shaft 1
The disadvantage is that the distance a between the screen and the bearing member 2 increases, and as a result, the biasing force of the spring 3 becomes weaker, and the resistance force against rotation of the winding shaft also becomes smaller, making it difficult to hold the screen in an arbitrary opening/closing position. It was hot.

In view of the above, the purpose of the present invention is to make it possible to hold the screen in any open/close position without using the above-mentioned spring. A permanent magnet is attached to the bearing member, and an adsorption member made of a magnetic material is attached to the end of the winding shaft, and the permanent magnet and the adsorption member are slid against each other via a sliding plate. It is characterized by being able to be adsorbed.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 shows a case in which the present invention is applied to a refrigerated case, where 10 is a refrigerated case, 11 is a fine mesh screen that shields the front opening of the case for heat insulation, and 12 is the screen 11.
The winding device 13 indicates an operation frame attached along the leading edge of the screen.

As shown in FIG. 3, the winding device 12 has bearing members 15 and 16 disposed at both ends of a case 14, and a support shaft 17 implanted in these bearing members 15 and 16. The shaft 17 is loosely inserted into a shaft hole 19 provided at the end of the winding shaft 18 of the screen, whereby the winding shaft 18 is rotatably supported within the case 14. In this case, a holder 21 which also serves as a magnetic pole piece is attached to the bearing member 15.
A, 21b are used to fix the permanent magnet 20, and an adsorption member 22 made of a magnetic material such as iron is attached to the end of the winding shaft 18, and the permanent magnet 20 and the adsorption member 22 are attached to a thin sliding plate. They are slidably attracted to each other via 23.

The suction member 22 also serves as a sprocket for winding an operating string 24 such as a ball chain, and by rotating the suction member 22, that is, the winding shaft 18, with the operating string 24, the screen 11 is rotated.
It is configured to open and close.

Further, the sliding plate 23 is desirably made of a non-magnetic material with excellent wear resistance such as stainless steel, but it may also be made of a magnetic material. The sliding plate 23 can be formed integrally with the sliding plate 23.

The screen winding device having the above configuration rotates the suction member 22 with the operation string 24, and winds up the screen 11 by rotating the winding shaft 18 accordingly. In this case, the attraction force between the permanent magnet 20 attached to the bearing member 15 and the attraction member 22 attached to the winding shaft 18 acts as resistance against the rotation of the winding shaft 18, and the attraction force allows the screen 11 to be moved freely. It can be held in the open/closed position.

In the illustrated embodiment, the screen is opened and closed by an operating string, but the winding shaft 1
It is also possible to have a structure in which a coil spring is built in inside the coil spring and the screen is automatically wound up using the elastic restoring force accompanying the twisting of this coil spring as a driving source. Needless to say, the present invention can be used not only for winding screens, but also for winding insulation screens used for building windows, etc.

As detailed above, according to the present invention, the permanent magnet fixed to the bearing member and the attraction member attached to the winding shaft are slidably attracted to each other, so that the screen can be held by their attraction force. It can be held in any open/closed position, and if a spring is interposed between the bearing member and the winding shaft in the direction in which they are separated as in the conventional method, the case may be closed due to the mounting location. As the length increases, the distance between the bearing member and the winding shaft increases, and the resistance force exerted by the spring becomes smaller.
It is often difficult to hold the screen in any open/closed position, but in this invention, the permanent magnet and the attraction member can be attracted regardless of the length of the case, so there is always a constant resistance on the winding shaft. can be given.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a conventional example, Fig. 2 is a side sectional view showing an embodiment of the present invention, and Fig. 3 is an A-A
It is an enlarged sectional view taken along a line. 11... Screen, 12... Winding device, 1
5, 16... Bearing member, 18... Winding shaft, 20...
...Permanent magnet, 22...Adsorption member, 23...Sliding plate.

Claims (1)

[Scope of utility model registration request] The winding shaft of the screen is rotatably supported by a bearing member, a permanent magnet is attached to the bearing member, and an adsorption member made of a magnetic material is attached to the end of the winding shaft, and these permanent magnets and the adsorption member are slid together. A screen winding device characterized in that the screen winding devices are slidably attracted to each other via moving plates.