JP5307488B2 - Screen extension mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable even an un-skilled person to easily and simply tension or replace a screen, when a screen mounting structure is simplified by directly fixing the screen itself to a sash. <P>SOLUTION: In this mechanism for tensioning the screen over a sash in a fixing state, vertical and horizontal screen mounting portions 1A and 1B of the sash 1 are provided with mounting grooves 7 and 8 for the screen 3, respectively; swelling portions 4 for locking are annexed to the four sides of the screen, respectively; and the fixation of the swelling part of the screen to the mounting groove is performed by engaging the mounting groove 7 with a groove cover 12 having the swelling part locked to an engaging groove 15, or by locking the swelling part between the mounting groove 8 and the groove cover 22 for covering the mounting groove 8. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a screen extending mechanism that enables a screen itself to be directly and easily fixed to a sash.

  Conventionally, when a screen for insect prevention, light shielding, heat insulation, blindfolding, pollen repellent, or decoration is supported by a sash or the like installed in a building opening, as shown in FIG. 13 and FIG. 3 is preliminarily stretched on a dedicated frame member 41 so that it can be handled as a screen fixing frame 40, which is an independent fitting, or can be used for opening and closing operations. Or slidably or detachably attached for opening and closing. However, as in recent years, in many buildings such as houses, various screens 3 for preventing insects and shading are stretched at the opening of the building, and the screen itself is not used like a window where people cannot enter and exit. If there are not a few cases where the screen 3 can be directly fixed to the sash or the like, it is not necessary to fix the screen 3 to the dedicated frame member 41 to form the screen fixing frame 40. It is advantageous to enable direct tensioning.

In addition, as disclosed in Patent Document 1, for example, the screen 3 can be directly stretched with respect to the sash. For example, such a screen is exchanged depending on the season. Or, the screens are often selected and stretched according to the preferences of the residents of the house, so it is often left to the residents to stretch and remove the screens. It is desirable that it can be easily done by non-experts, and the screen mounting mechanism is realized as a simple configuration with small dimensions in both the prospect and the direction of finding, and the members required to stretch the screen are opened by the sash. It is also desirable to have a configuration that does not obstruct the view that is being viewed.
JP 2007-177666 A

  The technical problem of the present invention is that the screen itself can be directly fixed to the sash to simplify the mounting structure of the screen. In particular, the screen can be stretched only by hand without using a tool, and the screen once stretched is not easily detached, and the screen is attached to a sash or the like. It can be easily placed near the screen protection plate provided near the door sliding door side, and the screen is protected by the screen protection plate near the door sliding door so that it can be stably stretched. It is to provide a screen extending mechanism.

In order to solve the above-described problem, according to the present invention, there is provided a screen extending mechanism for fixedly extending a screen to a sash installed in a building opening, and the vertical and horizontal screen mounting portions in the sash include The screen is provided with a screen mounting groove that opens toward the inside of the sash, and the screen is configured such that a bulging portion for locking is provided on four sides of the screen, and the screen has four rounds with respect to the screen mounting groove. The fixing means for fixing the locking bulging portion is a mechanism for engaging the synthetic resin groove lid for locking the bulging portion of the screen by pushing the opening of the mounting groove from the inside of the sash. provided with a Goashi, and that a pressing plate having a flat pressing surface for the fingertip pressing for pushing the mounting groove the engagement leg from the inside of the sash, moreover, as the above fixing unit, the support In one of the screen attaching portion of the vertical and horizontal in the sheet is provided with a engaging groove engaged the bulging portion to the pressing plate, engaging legs to engage with respect to the mounting groove is inserted into the mounting groove A pair of fixing members are connected to both ends of the leg plate via elastic flexible portions that are thinned, and the pair of fixing members are formed so as to be able to be inserted into the mouth edges of the opening of the mounting groove. The fixed member and the elastic flexible portion are engaged with the edge of the mounting groove after the insertion of the distal member into the mounting groove. A toggle mechanism that stops and changes the posture around the elastic flexible portion, and after the mounting of the fixing member to the mounting groove is completed, the tip member is locked to the inner edge of the mounting groove by the toggle mechanism using a first securing means being held in, you above sash That as the aspect of the fixing means in the other of the screen mounting portion, and engaged so the bulging portion between Mizofuta for lidding to the mounting Mizonokuchi edge and attachment groove, the groove lid of engaging legs There is provided a screen extending mechanism characterized by using second fixing means for locking the collar portion to the engaging edge of the mounting groove.
It is desirable that the locking bulges provided on the four circumferences of the screen are constituted by fastener halves.

In a preferred embodiment of a screen stretched mechanism according to the present invention, the mounting groove of the screen forms a direct mounting groove in a screen mounting portion of the sash, or to a groove member with the mounting groove fixing the sash Consists of.
Further, in a preferred embodiment of a screen stretched mechanism according to the present invention, required for the engagement mechanism with respect to the mounting groove of the engaging legs of the upper Kimizofuta, disengaging the engagement with the mounting groove of the engagement Goashi force However, it is comprised as what is larger than the pressing force for the pushing-in latching to the attachment groove | channel of the engagement leg by the press of the said press board.

  In the screen extending mechanism according to the present invention, the screen led out from the first fixing means of the bulging portion of the screen is disposed in proximity to the screen protection plate provided on the door side of the screen mounting portion of the sash. As described above, the engagement groove in the groove cover of the first fixing means is opened toward the screen protection plate, and the screen from the second fixing means of the bulging portion of the screen is connected to the mounting groove. In the groove member having a groove, the groove cover lid edge to be applied to the attachment groove is connected to the screen protection plate so as to be led out along the screen protection plate provided on the door sash side of the sash. It is desirable that the bulging portion be disposed so as to be locked along the mouth edge of the groove.

Further, in a preferred embodiment of the screen extending mechanism according to the present invention, the second fixing means of the bulging portion of the screen includes a groove member having the mounting groove fixed to the sash, and an edge of the mounting groove. a groove cover for locking the said bulging portion between, Ru is constructed by forming integrally with the synthetic resin through the bendable connecting portion made of soft synthetic resin.

  According to the screen extending mechanism of the present invention described in detail above, the screen itself is directly fixed to the sash, and when the screen mounting structure is simplified, the screen is extended, replaced, or removed. It is easy and can be performed easily even by an unskilled person. In particular, the screen can be stretched only by hand without using a tool or the like, and the once stretched screen is difficult to remove. In addition, the screen can be easily placed at a position close to a screen protection plate provided near the door side in a sash or the like, and the screen is protected by the screen protection plate at a position close to the door screen and is stable. It is possible to provide a screen stretching mechanism that can be stretched on the screen.

  FIGS. 1-12 has shown an example of implementation of the screen extending mechanism based on this invention. This screen extending mechanism is for fixedly extending the screen 3 on the inside of the door 2 such as a window in the sash 1 installed in the opening of the building. Groove members 5 and 6 provided with attachment grooves 7 and 8 for the screen 3 are attached to the screen attachment portions 1A and 1B, respectively. The mounting grooves 7 and 8 assume that the screen extending mechanism according to the present invention is applied to an existing sash, and as shown in FIGS. 1 to 3, in the screen mounting portions 1 </ b> A and 1 </ b> B of the sash 1. Although the groove members 5 and 6 having the attachment grooves 7 and 8 are fixed by an appropriate number of screws 9, the screen attachment portion in the sash 1 can be used without using the groove members as shown in FIG. The mounting groove 7A can be directly formed in 1A (the same applies to the mounting groove 8 of the mounting portion 1B), or an existing groove-shaped portion provided in the sash can be used.

  The vertical and horizontal groove members 5 and 6 in FIGS. 1 to 3 are independent screen fixing frames in which the screen 3 is stretched like the frame member 41 of the conventional screen 3 shown in FIGS. 13 and 14. 40, and the vertical and horizontal groove members 5 and 6 cannot withstand independent operation, and the screen mounting portion of the sash 1 as shown in FIG. At the four corners, the groove members 5 and 6 are aligned with each other by fitting with the corner member 10, but are not fixed to each other, but are fixed to the sash 1 with screws 9. In a state, a predetermined frame shape is held, but in a state where the screws 9 are screwed off and the groove members 5 and 6 are removed from the sash 1, they do not hold the frame shape. In addition, the concave groove 10a of the corner member 10 in FIG. 4 is for inserting the screen 3 attached to the vertical attachment groove 7 and the lower end of the bulging portion 4 (described later).

  On the other hand, the screen 3 is configured such that a bulging portion 4 for locking the groove members 5 and 6 is provided around the four circumferences. The bulging portion 4 is formed by a large number of engaging teeth arranged on one side of a flexible cloth tape 4a like a fastener half, and a general-purpose fastener (zipper) is provided around the screen 3 around the circumference. However, the bulging portion 4 does not need to be engaged with each other, and therefore can be constituted by an approximation to the fastener half.

In the screen extending mechanism in the illustrated embodiment, when the bulging portion 4 for locking the screen 3 is fixed to the mounting groove 7 of the screen 3 in the vertical groove member 5 attached to the sash 1, The first fixing means as shown in FIGS. 5 to 8, that is, the groove lid 12 having the engagement groove 15 for locking the bulging portion 4 on the outer surface side, and the engagement leg 16 provided on the groove lid 12 is It is fixed by engaging with the mounting groove 7. Since the engagement groove 15 is on the outer surface side of the groove lid 12, the engagement leg 16 or the like is not pinched between the engagement edge 16 and the groove edge of the attachment groove 7 or the like.
Further, with respect to the mounting groove 8 of the screen 3 in the horizontal groove member 6 attached to the sash 1, second fixing means as shown in FIGS. This is done by locking between the lip 8a of the mounting groove 8 and the groove lid 22 applied to the mounting groove 8. Also in this case, the screen 3 is not pinched between the lip 8a of the mounting groove 8.

  The first fixing means will be described in more detail with reference to FIGS. 5 to 8. The groove lid 12 made of synthetic resin attached to the mounting groove 7 while holding the bulging portion 4 includes a lid. As a main body 13, an engagement groove 15 for locking the bulging portion 4 is provided behind a pressing plate 14 for pressing the groove lid 12 toward the mounting groove 7, and the lid main body 13 is provided with the groove lid. Engagement legs 16 for engaging 12 with the mounting grooves 7 of the screen 3 are provided. The pressing plate 14 provided on the groove lid 12 is provided with a flat pressing surface 14 a for pressing the fingertip on the outer surface thereof in order to press the engaging leg 16 into the mounting groove 7.

  The engaging leg 16 is configured by connecting a pair of fixing members 16c via elastically flexible portions 16b thinned on both ends of the leg plate 16a inserted into the mounting groove 7, and the pair of fixing members 16c. The member 16c is locked to the edge 7a of the mounting groove 7 after the distal end member 16d is formed so as to be able to be inserted into the mounting groove 7 in a leading manner, and the distal end member 16d is inserted into the mounting groove 7. The front end member 16d is pressed in the direction of changing the posture around the elastic flexible portion 16b, and the base member 16e is integrated. The fixing member 16c and the elastic flexible portion 16b are configured such that the base member 16e is engaged with the lip 7a of the mounting groove 7 after the distal end member 16d is inserted into the mounting groove 7, and the elastic flexible portion. A toggle mechanism that changes the posture around 16b is configured. Therefore, after the mounting of the fixing member 16c to the mounting groove 7 is completed, the tip member 16d is moved inside the lip 7a of the mounting groove 7 by the toggle mechanism. It is configured to be held in a locked state.

Accordingly, as shown in FIG. 6, after the bulging portion 4 of the screen 3 is engaged with the engaging groove 15 in the groove lid 12, the tip member 16d of the pair of fixing members 16c of the engaging leg 16 is used as the groove material. 7, the tip member 16 d is moved into the mounting groove 7 as shown in FIG. 7 by pressing the flat pressing surface 14 a of the pressing plate 14 with a fingertip. When inserted, the connecting portion between the tip member 16d and the base member 16e is engaged with the lip 7a of the mounting groove 7, whereby the fixing member 16c is deformed by the elastic flexible portion 16b and the lip 7a. Even if the posture is changed around and the pressing plate 14 is not further pressed by the toggle mechanism, as shown in FIG. 8, the elastic flexible portion 16b causes the tip member 16d to move inside the edge 7a of the mounting groove 7. To hold elastically in a state of being locked to, Serial mounting of the mounting groove 7 of the fixing member 16c is completed.
FIG. 9 shows a state in which the groove lid 12 is locked to the mounting groove 7A of the sash 1 by the first fixing means.

  Moreover, the structure of the 2nd fixing means for fixing the said bulging part 4 to the attachment groove | channel 8 of the screen 3 in the horizontal groove | channel material 6 attached to the sash 1 is as shown in FIG.5 and FIG.10-12. A synthetic resin groove member 6 having the mounting groove 8 fixed to the sash 1 and a groove lid 22 for locking the bulging portion 4 between the lip 8a of the mounting groove 8 are soft. The bulging portion 4 is formed integrally with a synthetic resin via a bendable connecting portion 21 made of synthetic resin, and the bulging portion 4 is opposite to the rim 8a of the mounting groove 8 and the connecting portion 21 in the groove lid 22. It is engaged with the lid edge 22a, and the flange 23a of the engagement leg 23 provided in the vicinity of the lid edge 22a is engaged with the engagement edge 8b on the inner surface of the mounting groove 8 so that the lid can be applied. ing. The groove lid 22 also serves as a pressing plate 24 for pushing and locking the engaging leg 23 into the mounting groove 8, and the surface of the pressing plate 24 is a flat pressing surface 24 a for fingertip pressing. .

  Accordingly, as shown in FIG. 10, the groove lid 22 is closed as shown in FIG. 11 with the bulging portion 4 of the screen 3 held on the lip 8a of the mounting groove 8, as shown in FIG. By engaging the flange 23 a of the engagement leg 23 with the engagement edge 8 b in the attachment groove 8, the screen 3 can be held.

  In the embodiment described above, the bulging portion 4 is fixed to one of the vertical and horizontal screen mounting portions 1A and 1B in the sash 1, that is, in the vertical screen mounting portion 1A, the bulging portion 4 is engaged with the engaging groove. 15 is performed by the first fixing means configured to engage the groove cover 12 with the mounting groove 7, and in the other of the vertical and horizontal screen mounting portions 1A and 1B, that is, in the horizontal screen mounting portion 1B, The bulging portion 4 is locked between the lip 8a of the mounting groove 8 and the groove lid 22 to which the mounting groove 8 is applied, and the flange portion 23a of the engaging leg 23 of the groove lid 22 is connected to the mounting groove 8. A second fixing means configured to be engaged with the lip 8a is used.

  Thus, if the fixing means for the bulging portion 4 is different in the vertical and horizontal screen mounting portions 1A, 1B, the procedure of the screen mounting operation is improved. That is, the former groove cover 12 is suitable for engaging the groove cover 12 with the mounting groove 7 after the bulging portion 4 of the screen 3 has been inserted into the engagement groove 15 in advance, whereas in the latter case The bulging portion 4 of the screen 3 is fixed by closing the groove lid 22 in a state where the bulging portion 4 of the screen is held on the rim 8a of the mounting groove 8 in the groove member 6, and the former groove After the attachment of the one opposite side of the screen 3 by the lid 12, the attachment of the other opposite side of the screen 3 can be performed as an operation at another stage, so that the screen attaching operation is simplified.

  However, the fixing of the bulging portion 4 on the four circumferences of the screen 3 to the mounting grooves 7 and 8 of the screen 3 is performed by engaging the bulging portion 4 with the engaging groove 15 as shown in FIGS. It is performed by the first fixing means for engaging the stopped groove lid 12 with the mounting groove, or both are provided on the lip 8a of the mounting groove 8 and the mounting groove as shown in FIGS. It can also carry out by the 2nd fixing means which latches the said bulging part 4 between the groove cover 22 to cover.

  The screen 3 sets the interval between the bulging portions 4 at the opposing positions according to the interval between the mounting grooves 7 and 7 and the interval between the mounting grooves 8 and 8 in the vertical and horizontal screen mounting portions 1A and 1B of the sash 1. In order to apply the above-mentioned distance to an arbitrary sash, it is possible to easily adjust the mounting position of at least one screen 3 of the bulging portion 4 at the opposite position, The dimensions of the sash 1 and the screen 3 can be adjusted by appropriate means, such as preparing the groove lids 12 and 22 with different mounting positions of the bulging portion 4.

  In the above embodiment, the mounting grooves 7 and 8 are opened toward the inside of the sash 1, and the flat pressing surfaces 14 a and 24 a of the pressing plates 14 and 24 in the groove lids 12 and 22 are the grooves. The engagement legs 16 and 23 of the lids 12 and 22 are formed so as to be able to be pushed into the mounting grooves 7 and 8, and the engagement mechanisms of the engagement legs 16 and 23 of the groove lids 12 and 22 with respect to the mounting grooves 7 and 8, that is, The engagement of the engagement legs 16 and 23 with the attachment grooves 7 and 8 in the first and second fixing means is required to release the engagement of the engagement legs 16 and 23 with respect to the attachment grooves 7 and 8. The force is configured to be greater than the pressing force for pressing and locking the engaging legs 16 and 23 into the mounting grooves 7 and 8 by the pressing of the pressing plates 14 and 24.

  Such a configuration is effective not only for making it difficult to remove the screen once stretched, but also for facilitating the screen stretching operation, so that the screen can be stretched and replaced even by non-experts. It is easy to implement. Further, the pressing plates 14 and 24 have a relatively small pressing force for pressing and engaging the mounting grooves 7 and 8 and the surfaces thereof are flat pressing surfaces 14a and 24a. The groove lids 12 and 22 can be fixed only by work.

Further, the screen 3 led out from the first fixing means of the bulging portion 4 of the screen 3 is arranged close to the screen protection plate 11 provided on the door sliding door 2 side in the screen mounting portion 1A of the sash 1. Further, the engaging groove 15 in the groove cover 12 of the first fixing means is opened toward the screen protection plate 11. On the other hand, the screen 3 from the second fixing means of the bulging portion 4 of the screen 3 is led out along the screen protection plate 6a provided on the door sliding door 2 side of the sash 1 in the groove member 6 having the mounting groove 8. As described above, the lid edge 22a of the groove lid 22 that covers the mounting groove 8 locks the bulging portion along the edge 8a of the mounting groove 8 to which the screen protection plate 6a is connected. It is arranged to make it.
If comprised in this way, the said screen 3 can be easily arrange | positioned in the position close | similar to the screen protection plates 11 and 6a provided in the position close | similar to the door sliding door 2 side in a sash, and the attachment part of the screen 3 is a door. Since it is protected by the protective plates 11 and 6a at a position close to the shoji 2, it is effective for stably stretching the screen.

  When the screen extending mechanism having the above configuration is employed and the screen 3 is fixedly extended on the indoor side of the sash 1 of the building opening, it is difficult to manually open and close the door sliding door in the sash 1. . Therefore, when the screen extending mechanism can operate the door sash 1 of the sash 1 from the indoor side, for example, by operating the handle 25 on the indoor side as shown in FIGS. Suitable for open windows that can be opened and closed.

As shown in FIG. 3, the sliding window 2 is connected to the window frame 26 of the sash 1 through a pair of rotating levers 27, 28 whose both ends are rotatable, and the door 2 is rotatably connected to the handle 25. The worm wheel 29 can be driven to rotate through a worm (not shown) driven by the turning operation of the worm wheel 29, and the tip of the convex lever 29a provided on the worm wheel 29 and the intermediate portion of one rotary lever 27 are connected to the drive lever. 30, so that one of the rotary levers 27 is rotationally driven through the drive lever 30 by the rotational drive of the handle 25, and the door 2 is swung out of the window frame portion 26 so that the door is opened outward. The door 2 is opened to the position (FIG. 3), and the door 2 can be brought into a closed position (FIG. 1) by closing the window frame portion 26 by the reverse rotation operation of the handle 25.
In addition, since the mechanism which opens and closes the door shoji 2 with the handle | steering-wheel 25 is very generally known, those mechanisms can be employ | adopted suitably.

It is a longitudinal cross-sectional view which shows the state which attached the screen to the sash by one Example of the screen extending mechanism concerning this invention. FIG. FIG. 3 is a cross-sectional plan view of the state in which the opening window of FIG. 2 is opened. It is a partial expansion perspective view which shows the structure of the vertical and horizontal groove material. It is the same partial expansion perspective view which shows the state which stretched the screen in the said groove material. It is a principal part expanded sectional view which shows the initial stage which attaches a screen with respect to a vertical groove material. It is a principal part expanded sectional view which shows the intermediate | middle stage. It is a principal part expanded sectional view which shows the same attachment completion state. It is a principal part expanded sectional view of the completion state of attachment which shows the modification of the groove cover which fixes a screen. It is a principal part expanded sectional view which shows the initial stage which fixes a screen with respect to a horizontal groove cover. It is a principal part expanded sectional view which shows the intermediate | middle stage. It is a principal part expanded sectional view which shows the same attachment completion state. It is a longitudinal cross-sectional view which shows the state which attached the screen to the sash by the conventionally well-known means. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sash 1A, 1B Screen attachment part 3 Screen 4 Swelling part 5,6 Groove material 6a, 11 Screen protection board 7, 8 Attachment groove 7a, 8a Mouth edge 8b Engagement edge 12, 22 Groove cover 14, 24 Press plate 14a , 24a Flat pressing surface 15 Engaging groove 16, 23 Engaging leg 16a Leg plate 16b Elastic flexible part 16c Fixing member 16d Tip member 16e Base member 21 Connecting part 22a Lid edge 23a Ridge part

Claims (7)

A screen extending mechanism for fixedly extending a screen to a sash installed in a building opening,
The vertical and horizontal screen mounting portions in the sash are provided with screen mounting grooves that open toward the inside of the sash,
The screen is configured with a bulging portion for locking around its four circumferences,
The fixing means for fixing the bulging portion for locking the four rounds of the screen to the mounting groove of the screen is provided on the synthetic resin groove lid for locking the bulging portion of the screen with respect to the opening of the mounting groove. Provided with an engaging leg to be engaged by pressing from the inside of the sash, and a pressing plate having a flat pressing surface for fingertip pressing for pressing the engaging leg into the mounting groove from the inside of the sash,
Moreover, as the above fixing unit, in one of the screen attaching portion of the vertical and horizontal in the sash is provided with a engaging groove engaged the bulging portion to the pressing plate, to engage against the mounting groove engaging legs Are connected to a pair of fixing members via thin elastic flexible portions on both sides of the front end of the leg plate inserted into the mounting groove, and the pair of fixing members are respectively the openings of the opening of the mounting groove. A distal end member formed to be able to be inserted into the edge in a leading manner; and a base member integral with the distal end member; and the fixing member and the elastic flexible portion are inserted into the mounting groove after the distal end member is inserted. A toggle mechanism is formed in which the base member is engaged with the lip of the mounting groove to change the posture around the elastic flexible portion, and after the mounting of the fixing member to the mounting groove is completed, the tip member is moved by the toggle mechanism. The first is held in a state of being locked inside the lip of the mounting groove. Using the fixing means,
As the fixing means on the other of the vertical and horizontal screen mounting portions in the sash, the bulging portion is locked between the mouth edge of the mounting groove and the groove lid applied to the mounting groove, and the groove lid is engaged. Using the second fixing means for locking the flange of the joint leg to the engaging edge of the mounting groove;
A screen extending mechanism characterized by that. The mounting groove of the screen is formed by forming a mounting groove directly on the screen mounting portion in the sash, or by fixing a groove material having the mounting groove to the sash,
The screen stretching mechanism according to claim 1. The force required to disengage the engagement mechanism of the engagement leg of the groove lid with respect to the attachment groove from the engagement groove of the engagement leg is pushed into the engagement groove of the engagement leg by the pressing of the pressing plate. Greater than the pressing force for
The screen extending mechanism according to claim 1, wherein the screen extending mechanism is provided. The groove of the first fixing means is arranged so that the screen led out from the first fixing means of the bulging portion of the screen is disposed close to the screen protection plate provided on the door sliding door side of the screen mounting portion of the sash. The engagement groove in the lid is opened toward the screen protection plate,
The screen stretching mechanism according to any one of claims 1 to 3 . The mounting groove is provided so that the screen from the second fixing means of the bulging portion of the screen is led out along the screen protection plate provided on the door sash side of the sash in the groove member having the mounting groove. The lid edge of the lid for the groove cover is disposed so as to lock the bulging portion along the mouth edge of the mounting groove where the screen protection plate is continuously provided.
The screen stretching mechanism according to any one of claims 1 to 3 .   The second fixing means of the bulging portion of the screen includes a groove member having the mounting groove fixed to the sash, and a groove lid for locking the bulging portion between the rim of the mounting groove. 3. The screen extending mechanism according to claim 2, wherein the screen extending mechanism is formed integrally with a synthetic resin through a bendable connecting portion made of a synthetic resin. The bulging portion for locking is configured by a fastener half.
The screen extending mechanism according to any one of claims 1 to 6 , wherein the screen extending mechanism is provided.

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