JPH0450400Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a screen winding device that is applied to insect-proof screen doors, windows, heat insulation shielding devices such as refrigerated cases, and the like.

[Prior Art] As an example of a screen winding device configured to allow the screen to be opened and closed freely, an insect-proof screen door as described in Japanese Utility Model Application Publication No. 147896/1983 is known. In this method, a screen is wound around a winding shaft which is driven by the elastic restoring force generated by the torsion of a coil spring, and the screen is opened and closed by inserting and guiding both ends of the screen through slits into a hollow guide rail. However, during use, the screen must be held in the closed position against the force of the coil spring in the winding direction.

[Problems to be Solved by the Invention] An object of the invention is to provide a screen winding device with a simple structure that can reliably hold the screen in the closed position.

[Means for solving the problems] In order to solve the above problems, in the present invention,
A screen is wound around a winding shaft whose driving source is the elastic restoring force generated by the torsion of a coil spring, and both ends of the screen are inserted into hollow guide rails through slits, and while being guided by the guide rails. In the screen that can be opened and closed, an operating frame for opening and closing is attached to the tip of the screen, runners movable along the guide rail are attached to both ends of the operating frame, and the guide rail is provided with a runner that is movable along the guide rail. A locking hole is provided for fitting and locking the runner when the screen is closed, and when the operating frame is pulled down to the screen closing position, the runner is pushed toward the front of the screen to lock the runner. A spring member that fits into the hole is provided, and the runner can be removed from the locking hole by pushing the operating frame toward the back of the screen against the biasing force of the spring member. It is something.

[Operation] When the screen is closed, when the screen is pulled out by holding the operating frame, the rotation of the winding shaft imparts twist to the coil spring, and energy in the winding direction is stored therein. When the screen is pulled out to the maximum extent to the position where it closes an opening such as a window, and the runners at both ends of the operating frame reach positions corresponding to the locking holes, the runners are pressed from behind by the spring member and engaged. The screen is fitted and locked in the stop hole, and the screen is held in the closed position against the force of the coil spring in the winding direction.

To open the screen, all you have to do is push the runner backwards against the spring member using the operating stile, and this will pull the runner out of the locking hole and release the engagement, so the elasticity of the coil spring will be reduced. The screen is wound up by the restoring force.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

Figures 1 and 2 illustrate the case where the screen winding device of the present invention is applied as an insect-proof screen door that opens and closes in the vertical direction.
The take-up box 2, 2 is a hollow guide rail that is attached to the vertical frames 4, 4 on the left and right sides of the building opening, and inside the take-up box 1, there is a take-up box 2 facing in the horizontal direction. A shaft 5 is rotatably supported, and one end of a net-like screen 6 is wound around the winding shaft 5. An operating frame 7 is attached to the tip of the screen 6, and the operating frame 7 allows the screen 6 to be It is configured to open and close in the vertical direction.

The winding shaft 5 has a coil spring (not shown) built therein, and automatically winds up the screen 6 using the elastic restoring force generated by the torsion of the coil spring as a driving source.

The left and right ends of the screen 6 are movably inserted into the guide rail 2 provided in the opening/closing direction through the slits 10 on the sides, and the both ends of the screen 6 are made of flexible synthetic resin. A locking piece 11 for preventing removal formed of a sheet such as
are arranged in a folded manner so that the tips thereof spread apart from the screen 6 due to elastic force, and the tips of the locking pieces 11 can be engaged with the locking walls 12 on both sides of the slit 10. They are facing each other. This locking piece 11 does not come off from the guide rail 2 by locking to the locking wall 12 during normal times or when a relatively weak force such as wind pressure is applied to the screen 6. However, if a large force is applied to the screen 6, such as when a foreign object collides with it, the locking piece 11 will be bent and reversed and pulled out from the guide rail 2, thereby preventing the screen 6 from being damaged. It is configured so that

The operation frame 7 is attached to the screen 6 by inserting and locking the tip of the screen 6 into the interior through a slit 15 provided on the top surface, and is shown in detail in FIGS. 3 to 5. Like,
Caps 16 are attached to both ends of the operating frame 7 to conceal the ends thereof, and runners 18 are attached to the operating frame 7 so as to be movable within the guide rail 2 via arms 17 protruding from the caps 16. An inclined surface 19 for locking that slopes forward upward at the upper end of the
A flexible spacer 2 is provided at the lower end of the operation frame 7 to prevent a gap from being formed between the screen 6 and the lower frame 8 of the building opening when the screen 6 is opened and closed.
0 is attached, and a grip portion 21 for opening/closing operations is provided on the front side of the operation frame 7.

On the front surfaces of the left and right guide rails 2, 2, there are locking holes 22 in which the runners 18 can be fitted and locked at positions corresponding to the runners 18 when the screen 6 is closed; A spring member 23 is provided to push and fit the runner 18 into the locking hole 2.
2 is a hook 25 with a square hole attached to a guide rail 2.
The hook 25 is attached to an opening provided in the front surface of the hook 25, and the upper edge of the square hole of the hook 25 is formed into an inclined surface 26 inclined in the same direction as the inclined surface 19 of the runner 18; It is formed by bending the strip into a substantially dogleg shape, and the bent portion 23
a at the approximate center of the locking hole 22.
2, and the straight part 23b at the tip is arranged behind the locking hole 22 with the straight part 23b at the tip inclined backward so as to serve as a guide for the runner 18, and in this state, the base end part of the spring member 23 is It is fixed to the mounting portion 25a of the hook 25.

Moreover, the slit 1 in the guide rail 2
In order to enable displacement of the arm 17 when the runner 18 fits into the locking hole 22, a wide portion 10a is formed at the lower end of the locking hole 22 by cutting out the locking wall 12 on the locking hole 22 side. is formed.

In addition, 28 in the figure is fittings such as glass shoji.

In the insect-proof screen door having the above configuration, when the screen 6 is pulled out using the grip part 21 of the operating frame 7 when the screen 6 is closed, the coil spring is twisted by the rotation of the winding shaft 5, and the coil spring is twisted in the winding direction. Energy is stored.

On the other hand, when the screen 6 is pulled out to its maximum extent to the position shown in FIG. 18 is pushed forward and automatically fits into the locking hole 22, so that the inclined surfaces 19 and 26 are locked. Therefore,
The screen 6 will be held in the closed position against the force of the coil spring in the winding direction.

Even if wind pressure or other relatively weak external force acts on the screen 6 in the closed state, the end of the screen 6 will come off the guide rail 2 due to the engagement of the locking piece 11 with the locking wall 12. On the other hand, when a large external force is applied to the screen 6, the locking piece 11 is bent and reversed, and the locking wall 12
This prevents the end of the screen 6 from coming off the guide rail 2 and being damaged.

When opening the screen 6, the operating frame 7 is pressed against the back side of the screen 6 using the grip portion 21, and the runner 18 is pushed backward against the biasing force of the spring member 23. As a result, the runner 18 is pulled out of the locking hole 22 and the engagement is released, so that the screen 6 is wound up by the elastic restoring force of the coil spring.

In each of the above embodiments, the locking pieces 11 are provided on both sides of the screen 6, but they may be provided on only one side of the screen.
It goes without saying that the above-mentioned screen winding device can be applied not only to insect-proof screens but also as a screen device for opening and closing insulating windows, refrigerated cases, etc.

[Effect of the invention] According to the screen winding device of the invention having the above configuration, runners are attached to both ends of the operating frame at the tip of the screen, and the runners are fitted into the locking holes of the guide rail at the closed position of the screen. Since the screen is locked, the screen can be reliably held in the closed position, and the runner is automatically pushed into the locking hole by the spring member when the screen is in the closed position. Simply pulling out the screen does not require any special operations to fit the runners into the locking holes, and when opening the screen, the locking holes can be inserted by simply pushing the operating frame lightly toward the back of the screen. The opening operation is very easy and safe because the runners can be pulled out from the screen and pulled out from the screen. When the runner is removed from the spring by applying This eliminates the problem of the runner being suddenly hoisted up and rising at high speed the moment the runner comes off, causing the operating stile to violently collide with the take-up box, causing noise and damage.

[Brief explanation of drawings]

Fig. 1 is a partially broken front view showing an embodiment of the present invention, Fig. 2 is a partially omitted enlarged sectional view taken along line A-A, Fig. 3 is an enlarged view of the main part of Fig. 1, and Fig. 4. is the third
A sectional view taken along the line B-B in the figure, and FIG.
It is a sectional view taken along the C line. 2...Guide rail, 5...Take-up shaft, 6...Screen, 7...Operation frame, 10...Slit, 1
8...Runner, 22...Latching hole, 23...Spring member.

Claims (1)

[Claims for Utility Model Registration] A screen is wound around a winding shaft whose drive source is elastic restoring force due to the torsion of a coil spring, and both ends of the screen are inserted into a hollow guide rail through a slit, and the guide The screen is opened and closed with both ends guided by rails, wherein an operating frame for opening and closing is attached to the tip of the screen, and runners movable along the guide rails are attached to both ends of the operating frame. The guide rail is provided with a locking hole for fitting and locking the runner when the screen is closed, and the runner is fixed in the front direction of the screen when the operating frame is lowered to the screen closing position. A spring member is provided to push the operating frame toward the back of the screen against the biasing force of the spring member, and the runner is removed from the lock hole. A screen winding device characterized in that: