JPH0411851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roll-up screen device for opening and closing a large screen such as a large projection screen.

[Conventional technology]

A simple screen device in the form of a winding net-like screen is known as an insect-proof screen. It simply provides elastic restoring force to the winding shaft, but cannot be applied to large screens.

A screen device disclosed in Japanese Utility Model Application Laid-Open No. 140695/1983 is known as one that can also be applied to large screens.

This screen device has a winding shaft that has an elastic restoring force in the winding direction attached to one side of a rectangular frame.
One end of the screen is fixed to the winding shaft, locking edges are provided on both sides of the screen, guide rails are provided on both sides of a rectangular frame, and the locking edges are engaged with the inner edges of the slits.

[Problem that the invention seeks to solve]

The screen device according to the above-mentioned publication can be used for large screens because the locking edges at both ends of the screen are guided by guide rails, so there is no problem such as the screen coming off due to external force.

However, since the locking edge is guided by the guide rail, the frictional resistance along the length of the locking edge is large, so the winding restoring force must be increased, and the frictional resistance during winding is large. There are various problems such as wrinkles occurring in the middle of the screen due to non-uniformity, making it impossible to wind the screen, and conversely requiring a large force to pull out the screen.

The present invention takes into consideration the various problems of the conventional screen devices described above, and provides a screen device in which fasteners are provided at both ends of the screen to reduce frictional resistance in order to smoothly wind up a large screen. With the goal.

[Means for solving problems]

In order to solve the above problems, the present invention attaches a winding shaft having an elastic restoring force in the winding direction to one side of a rectangular frame, fixes one end of the screen to this winding shaft, and connects both side edges of the screen and the rectangular frame. A fastener is provided between each of the fasteners, and the fastener engages and engages a pair of vertically extending engaging edge members that can be freely engaged and separated from each other and can be freely shifted in the length direction. It consists of a slider that opens,
One side of the engaging edge material is fixed to the side edge of the screen, and the other is fixed to the side edge of the rectangular frame, and the slider is guided by a guide rail provided along the side edge of the rectangular frame, and the slider on both sides is guided by an operating pull. A roll-up type screen device was created by connecting the two.

In the above-mentioned screen device, the fastener has a pair of engaging edge members, each of which has a plurality of vertical ribs arranged in parallel and alternately inset on opposing surfaces that overlap each other, and has a hooked edge at the tip of the rib. A pair of presser members having a substantially U-shaped cross section are mounted on both ends of the wedge member, and a groove is provided inside the wedge member that branches into two along the slope of the wedge member from the apex side opening of the inner wedge member, and a groove is provided inside the wedge member along the slope of the wedge member on both sides. It may also be provided with a slit.

[Effect]

In the screen device of the present invention constructed as described above, when not in use, the screen is wound up with the slider moved to the end on the winding shaft side. In use, when the screen is pulled down and the operating pull of the slider is also pulled down, the slider causes the mating edges to engage each other and the screen is immediately extended.

At the time of winding, on the contrary, the slider is lifted to disengage the engagement edge material and move to the end on the winding shaft side. At this time, the engagement of the engagement edge material remains for a short length at the end of the winding shaft, but the frictional resistance due to this engagement is small, so the screen can be smoothly wound up with a small force, making the operation extremely easy. It becomes easy.

〔Example〕

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

FIG. 1 is an overall schematic perspective view of a screen device having a large projection screen. 1 is a rectangular frame, and 2 is a winding shaft, which is supported within a box 4 attached to an upper frame portion 3 of the rectangular frame 1.
The winding shaft 2 has an elastic restoring force due to a coiled spring, but the coiled spring is not shown because it is well known.

One end of a screen 5 is wound and fixed on the winding shaft 2, and an operating handle 6 is attached to the lower end of the screen.

Fasteners 10 shown in FIGS. 4 to 7 are provided between both side edges of the screen 5 and both side frames of the rectangular frame 1. This fastener 1
0 has a pair of engaging edge members 7a, 7b with a locking edge 8a,
8b, and a slider 14 that fits into the engaging edge member.

The pair of engaging edge members 7a and 7b extend in the vertical direction so as to be able to engage with and separate from each other, and have a plurality of vertical ribs arranged in parallel and alternately inset on opposing surfaces that overlap each other, and have hooked edges at the ends of the ribs. Consists of 9. Even when the edge members are fitted and engaged with each other, they can slide in the longitudinal direction and be displaced from each other.

The engaging edge members 7a and 7b are made of a tough, slippery, and abrasion-resistant thermoplastic synthetic resin such as polyamide resin, and when heated and in a semi-molten state, one of the engaging edge members 7a is heated. The locking edge 8a is fixed to the screen 5, and the locking edge 8b of the other engaging edge member 7b is fixed to the side frame 12.

Reference numeral 11 denotes a tape welded along the opposite surface of the surface where the above-mentioned locking edge 8a and the edge of the screen 5 overlap, and is made of the same material as the locking edge material, thereby integrating the locking edge material 7a with the screen. It is firmly attached to the

The slider 14 of the fastener 10 has a wedge member 14' whose cross section is shown in FIG. Groove 16a, 1 branched into two along the wedge member slope
6b is provided inside, and slits 17a, 17b are provided on both sides of the holding members 14a, 14b along the above-mentioned slopes. Both ends of operating pulls 15 are fixed to both of the sliders 14.

As shown in FIG. 7, the engaging edge material 7a is passed from one end of one holding member 14a into the groove 16a and slit 17a, and the engaging edge material is passed from one end of the other holding member 14b into the groove 16b and into the slit 17b. When the engagement edge members 7a and 7b are pulled out from the opening 7 at the other end through the edge member 7b, the ribs of both edge members are in an engaged state where the ribs fit into each other.

As shown in FIG.
3, and the slider 14 is inserted between these rails and guided in the vertical direction. The slider 14 is received by a stopper (not shown) on the side of the winding shaft 2 so that it does not come off the engaging edge members 7a, 7b.

The screen device of the embodiment configured as described above is used as follows. When the screen device is not in use, the screen 5 is wound up with the slider 14 in contact with the stop bar on the winding shaft 2 side. When in use, grasp the operating handle 6 and pull down the screen 5.

Next, the other operating handle 15 is similarly pulled down to engage the engaging edge members 7a, 7b of the fastener 10 with each other along the length direction. In this way, the screen 5 is fixed linearly in the vertical direction by the engaging edge members 7a and 7b at both ends.

When winding up, on the contrary, the operating handle 15 is lifted to separate and release the engaging edge members 7a and 7b of the fastener 10. When the operating handle 6 is lifted, the screen 5 is automatically lifted by the spring force of the winding shaft 2. At this time, the engaging edge members 7a and 7b of the fastener 10 are engaged by a short length at the upper end, but since the lengths are short, the frictional resistance between them is extremely small, and one of the engaging edge members 7a and 7b can be smoothly engaged. It is rolled up while shifting.

In the above embodiment, a screen device in which the screen 5 is wound up and down in the vertical direction has been described, but it will be clear to those skilled in the art that the present invention can also be applied to a screen device in which the screen 5 is wound up in the horizontal direction.

〔effect〕

As explained in detail above, the screen device of the present invention provides fasteners along the winding direction on both sides of the screen to be wound up by the winding shaft, and these fasteners are used as engaging edge members that can be engaged and separated. Since this is formed from a slider that is operated, if the slider is positioned at the upper end when pulling out or rolling in the screen, the frictional resistance between the engaging edge materials will be reduced, making it extremely easy to pull out and roll in the large screen. It has the effect of becoming.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the winding screen device, Fig. 2 is an enlarged partially cutaway front view of the same figure, Fig. 3 is a partially cutaway right side view of the same figure, Fig. 4 is an enlarged perspective view of the side part of the screen, Figure 5 is an enlarged cross-sectional view of the main parts of the same as above, Figure 6
The figure is a cross-sectional view of the guide rail section, and FIG. 7 is a vertical cross-sectional side view of the slider. 1... Rectangular frame, 2... Winding shaft, 5... Screen, 7a, 7b... Engaging edge material, 8a, 8b
...Latching edge, 9... Hook edge, 10... Fastener,
13... Guide rail, 14... Slider, 1
4'... Wedge member, 14a, 14b... Pressing member, 16a, 16b... Groove, 17a, 17b...
Slits.

Claims (1)

[Claims] 1. A winding shaft having an elastic restoring force in the winding direction is attached to one side of the rectangular frame, one end of the screen is fixed to this winding shaft, and there is a space between both side edges of the screen and the rectangular frame. Each fastener is provided with a fastener, and the fastener includes a pair of vertically extending engaging edge members that can be freely engaged and separated from each other and can be freely shifted in the length direction, and a slider that fits into these and engages and releases the edge members. One of the engaging edge members is fixed to the side edge of the screen, and the other is fixed to the side edge of the rectangular frame, and the slider is guided by a guide rail provided along the side edge of the rectangular frame, and the slider on both sides A roll-up type screen device consisting of two connected by an operating handle. 2. The fastener has a pair of engaging edge members, each of which has a plurality of longitudinal ribs arranged in parallel and alternately inset on opposing surfaces that overlap each other, and has a hooked edge at the tip of the rib, and the slider has a hooked edge at both ends of the wedge member. A pair of presser members each having a substantially U-shaped cross section are mounted on the outside, and a groove is provided inside thereof that branches into two along the slope of the wedge member from the opening on the apex side of the inner wedge member, and slits are provided on both sides along the slope. The roll-up type screen device according to claim 1, characterized in that: