JP2013221290A - Opening and closing window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening and closing window capable of preventing a sash from descending, coming off and opening in the case of fire and the like, by inexpensive means having a simple structure.SOLUTION: A locking pin 40 is protrusively provided on a surface, which faces a jamb 6, of a stile 11, and a descent prevention plate 37 having a locking groove 38 directed in a vertical direction and enabling an entry of a locking pin 12 in the closing of a sash is attached to a surface, which faces the stile, of the jamb 6. When the sash descends in a locked state, a lower end of the locking pin 12 descending together with the sash abuts on a lower edge of the locking groove 38 of the descent prevention plate 37 to inhibit a lock pin 28 from coming off from an engagement groove 36 of a lock plate 29.

Description

  The present invention relates to an open / close window that can prevent a shoji attached to a window frame from being opened and closed when a fire breaks out and the like so that the lock is released and the shoji is opened or dropped.

In the case of a plastic opening / closing window in which a shoji made of glass fitted into a synthetic resin window sill is attached to a synthetic resin window frame so that it can be opened and closed, in the event of a fire, the fire spreads from the inside or outside of the window. The issue is how to prevent soaking.
That is, when a synthetic resin window frame or window sill is heated by flame or radiant heat, it softens or carbonizes, and the hinge mounting part pivoting so that the window slidably opens and closes to the window frame is deformed. In addition, the shoji may descend with respect to the window frame. If it becomes like this, the function of the locking device which locks the shoji to the window frame at the door end on the opposite side of the hinge is lost, and there is a high risk that the shoji will open or fall off and burn.

In view of such a problem, there is a window frame that is hard to cause thermal deformation by filling a hollow portion of a synthetic resin window frame with a refractory mortar made of a cement composition and curing it (Patent Document). 1).
In addition, a metal reinforcing material is provided inside the frame material constituting the rectangular frame-shaped window rod, and the metal reinforcing materials adjacent to each other at the corner portion are connected by a corner metal fitting, and the metal provided on the upper frame of the window frame. There is also a type in which a receiving metal fitting is attached to a reinforcing member, and a supporting metal provided at the upper part of the window fence is inserted into the above receiving metal fitting to suspend and support the shoji when the window fence is softened (Patent Document 2). reference).

JP 2011-12896 A Japanese Patent No. 4229286

If the mortar or the like is filled in the hollow portion of the window frame as in the above-mentioned Patent Document 1, not only the manufacturing cost of the window frame increases, but also the mass thereof increases. Workability at the time of installation deteriorates.
In the resin window described in Patent Document 2, the support fitting provided on the upper part of the window ridge is inserted into the receiving fitting provided on the upper frame of the window frame, and when the window fold is softened, the shoji is suspended, This is intended to prevent the fall and drop of the paper, and no measures are taken to prevent the opening of the shoji.
Therefore, as described above, when the hinge mounting portion is deformed by heat and the function of the locking device that locks the shoji to the window frame is lost, the shoji may open and burn out.
Moreover, since the structure of each member for preventing the sliding paper from falling off is complicated, there is a problem that each member cannot be easily attached to the existing opening / closing window later.

  The present invention has been made in view of the above problems, and has an open / close window that is simple and inexpensive, and that can be prevented from lowering, dropping off, and opening the shoji in a fire or the like by means that can be retrofitted. The purpose is to provide.

According to the present invention, the above-mentioned problems are solved as follows.
(1) A vertical frame facing the window frame provided in the building opening of the building, a sliding door type shoji provided in the window frame, and a vertical fence on the door-end side constituting the window rod of the shoji And a lock pin that moves in the vertical direction linked to the operating means provided on the window ridge and is mounted on the surface of the vertical frame that faces the vertical ridge so as to face the lock pin. And a lock plate having a pin entry groove into which the lock pin can enter and an upward engagement groove continuous with the inner part of the pin entry groove, and when the operation means is operated to the lock position, the lock pin is In the opening and closing window that can prevent the shoji from opening by moving upward through the pin entry groove and entering the engagement groove,
A locking pin protrudes from one of the opposing surfaces of the downboard and the vertical frame, and a vertical direction in which the locking pin can enter when the shoji is closed on the other opposing surface. When the lowering prevention plate having the facing locking groove is attached and the shoji is lowered in the locked state, the lower end of the locking pin descending together with the shoji comes into contact with the lower edge of the locking groove of the lowering prevention plate, or The upper edge of the locking groove of the lowering prevention plate that descends with the shoji is in contact with the upper end of the locking pin, thereby preventing the lock pin from being detached from the engaging groove.

With such a configuration, when the window frame or window lamp is heated by a flame from inside or outside the window in the event of a fire, etc., the hinge mounting part softens, and the locked shoji is lowered with respect to the window frame, When the lower end of the pin comes into contact with the lower edge of the locking groove of the lowering prevention plate or the upper edge of the locking groove of the lowering prevention plate comes into contact with the upper end of the locking pin, the shoji is lowered from a predetermined position. Is prevented, and the lock pin is prevented from being detached from the engagement groove. Therefore, the shoji does not fall off and is not opened due to the loss of the lock function, and there is no risk of burning due to a flame approaching from the inside or outside of the opening / closing window in the event of a fire.
Further, since the sliding member can be prevented from descending, falling off, and opening by a simple means including the locking pin and the lowering prevention plate, an inexpensive opening / closing window can be provided.

(2) In the above item (1), an upward protrusion that is continuous with the lower edge of the locking groove or a downward direction that is continuous with the upper edge of the locking groove at the opening of the locking groove where the locking pin enters The locking pin is provided so as to prevent the locking pin contacting the lower or upper edge of the locking groove from being detached from the locking groove.

  With such a configuration, when the lock pin descends below the lower end of the engagement groove and the shoji tries to open, the lock pin continues upward with the lower edge of the lock groove or the lock groove. Since it contacts the downward projection that is continuous with the upper edge, the shoji is reliably prevented from opening.

(3) In the above item (2), the locking pin and the lowering prevention plate are provided at positions close to the lock plate or the lock pin, respectively.

  With such a configuration, it is possible to reliably prevent the lock pin from being detached from the engagement groove of the lock plate when the shoji is lowered.

(4) In the above item (1) or (2), a locking groove is provided in the back of the pin entry groove and the engagement groove in the lock plate so as to be continuous with the pin insertion groove and the engagement groove. Therefore, the lock plate is shared as a lowering prevention plate.

  With such a configuration, the lowering prevention plate as a separate member becomes unnecessary, so that the number of parts and the cost can be reduced.

(5) In any one of the above items (1) to (4), the locking pin is a headed locking pin having a head having a diameter larger than that of the shaft, and the head is an edge of the locking groove. Engage with the back.

  With such a configuration, even when the window jar and the window frame are softened in the event of a fire, a gap is less likely to occur between the opposing surfaces of the outer surface of the window awn and the inner surface of the window frame.

(6) In any one of the above items (1) to (5), the locking pin and the lowering prevention plate are attached to the window frame or the window ridge with screws screwed from the outside.

  With such a configuration, the locking pin and the lowering prevention plate can be easily retrofitted to the window frame and the window ridge of the existing opening / closing window, so that fire prevention measures can be taken at low cost for the existing opening / closing window.

(7) In an opening / closing window provided with a window frame provided at a building opening of a building, a sliding door type shoji provided in the window frame, and a lock device for locking the shoji.
A locking pin protrudes from one of the mutually facing surfaces of the vertical fence on the door-end side constituting the window fence of the shoji and the vertical frame facing the vertical fence, and the other opposed A lowering prevention plate having a vertically extending locking groove into which the locking pin can enter when the shoji is closed is attached to the surface, and when the shoji is lowered to a predetermined position in the locked state, it is lowered with the shoji. The lower end of the locking pin abuts the lower edge of the locking groove of the lowering prevention plate, or the upper edge of the locking groove of the lowering prevention plate descending with the shoji comes into contact with the upper end of the locking pin, The sliding door is prevented from descending from a predetermined position.

In such a configuration, when the window frame or window fence is heated by the flame from the inside or outside of the window in the event of a fire, etc., and the locked shoji is lowered with respect to the window frame, the lower end of the locking pin will be The shoji is prevented from descending from a predetermined position by contacting the lower edge of the locking groove or by contacting the upper edge of the locking pin of the lowering prevention plate with the upper end of the locking pin. Therefore, the shoji does not fall off and is not opened due to the loss of the lock function, and there is no risk of burning due to a flame approaching from the inside or outside of the opening / closing window in the event of a fire.
Moreover, since the lowering of the shoji can be prevented by a simple means having a configuration including the locking pin and the lowering prevention plate, an inexpensive opening / closing window can be provided.

(8) In the above item (7), an upward projecting portion that is continuous with the lower edge of the locking groove or a downward direction that is continuous with the upper edge of the locking groove at the opening portion of the locking groove where the locking pin enters The locking pin is provided so as to prevent the locking pin contacting the lower or upper edge of the locking groove from being detached from the locking groove.

  With such a configuration, when the shoji is opened, the locking pin comes into contact with an upward protrusion continuous with the lower edge of the locking groove or a downward protrusion continuous with the upper edge of the locking groove. The shoji is surely prevented from opening.

  ADVANTAGE OF THE INVENTION According to this invention, the opening / closing window which can prevent the fall of the shoji, drop-off, and opening at the time of a fire etc. can be provided with a simple structure and an inexpensive means.

It is the front view which looked at the opening / closing window provided with the 1st Embodiment of this invention from the indoor side. FIG. 2 is an enlarged cross-sectional plan view taken along line II-II in FIG. 1. It is an expansion disassembled perspective view of the lock part in the vertical frame of a window frame, and the vertical frame of a window frame. It is the IV-IV line expansion vertical side view of FIG. Similarly, it is a vertical side view of the same part as FIG. 2 when the shoji is lowered. FIG. 6 is an enlarged vertical sectional view taken along line VI-VI in FIG. 4. FIG. 7 is an enlarged vertical sectional view taken along line VII-VII in FIG. 5. It is a disassembled perspective view of the same site | part as FIG. 3 which shows the 2nd Embodiment of this invention. Similarly, it is the vertical side view of the same site | part as FIG. 4 which shows 3rd Embodiment. Similarly, it is a vertical side view when the shoji is lowered.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an opening / closing window according to a first embodiment of the present invention as viewed from the indoor side, and FIG. 2 is an enlarged cross-sectional plan view taken along line II-II in FIG. A rectangular frame-like window frame 2 attached to the opening of 1 and a shoji 3 that opens to the outdoor side (upper side of FIG. 2) attached to the window frame 2 are provided. In the following description, the front and rear of the opening / closing window will be described with the indoor side being the front and the outdoor side being the rear.

  The window frame 2 is composed of an upper frame 4, a lower frame 5, and left and right vertical frames 6, 6 formed of a synthetic resin such as a vinyl chloride resin, and in the internal space 7 in the longitudinal direction formed therein, A metal reinforcing member 8 is inserted.

  The shoji 3 has a rectangular frame-shaped window rod 12 formed of a synthetic resin such as a vinyl chloride resin and made up of an upper cage 9, a lower cage 10, and left and right vertical rods 11, 11. Inner and outer double glazings 15 and 16 fitted in a watertight manner through sealing materials 13 and 14 are provided. A metal reinforcing member 18 is inserted into the longitudinal inner space 17 formed in the upper rod 9, the lower rod 10 and the left and right vertical rods 11.

On the inner surface of the window frame 2 closer to the indoor side, an inward protrusion 6 a is provided in which the outer peripheral portion of the window tub 12 abuts via the seal member 19.
Further, on the outer surface of the window tub 12 near the outdoor side, an outward projecting portion 12 a is provided so that the inner peripheral portion on the outdoor side of the window frame 2 abuts via the seal member 19.

  The shoji 3 is opened to the outdoor side by attaching a pair of upper and lower hinges 20, 20 to the outer side of the left vertical frame 6 of the window frame 2 on the outer side of the left vertical frame 11. It has become possible.

As shown also in FIG. 3, the inwardly extending ridges 21, 21 in the vertical direction that face each other are opposed to the opposing surface of the opening at the substantially central portion of the outer surface of the vertical rod 11 on the door-end side of the window rod 12. By providing the upper and lower concave portions 22 that are open outward, the width in the inner and outer direction of the opening is smaller than the inner portion. In this recess 22, slide plates 23 made of aluminum or an alloy thereof facing upward and downward are provided with recesses 24, 24 provided so as to face each other on both the front and rear sides thereof. It is fitted and accommodated freely. The vertical dimension of the slide plate 23 is set to be shorter than that of the vertical rod 11 so that the slide plate 23 can move in the vertical direction.
The outer surfaces of the slide plate 23 and the vertical rod 11 are aligned with each other.

  The slide plate 23 is linked to a handle 25 (see FIGS. 1 and 2) mounted on the front surface of the vertical shaft 11 on the door-end side with a linkage mechanism (not shown), and the handle 25 is rotated to a downward locked position. At this time, the slide plate 23 moves upward, and when it is turned to the upward unlocking position, it moves downward. Note that the linkage mechanism between the slide plate 23 and the handle 25 is not directly related to the present invention and is a known mechanism, and therefore the specific configuration thereof is omitted.

At both the upper and lower ends of the outer surface of the slide plate 23, a headed lock pin 28 comprising a headed screw 26 having an enlarged head portion 26a and a cylindrical shaft portion 27 rotatably fitted thereto is provided. By screwing the headed screw 26 into the slide plate 23, the shaft portion 27 is attached so as to be able to rotate. Further, a lock plate 29 to which the headed lock pin 28 can be engaged and disengaged is attached to the inner surface of the vertical frame 6 facing the headed lock pin 28. The lock plate 29, the slide plate 23, and the headed lock pin 28 constitute a lock device for the shoji 3.
Since the upper and lower headed lock pins 28 and the lock plate 29 have the same shape, only the upper one is shown, and the lower one is not shown.

  As shown in FIG. 4, the lock plate 29 includes an upper horizontal piece 29 a, a lower horizontal piece 29 b, a front piece 29 c, a rear piece 29 d, and a side piece 29 e on the side facing the vertical rod 11. The frame 6 side) has a generally vertically long case shape, and the upper horizontal piece 29a and the lower horizontal piece 29b have L-shaped attachment pieces 30 facing upward and downward at the edges of the vertical frame 6 side, respectively. 30 and an attachment piece 31 facing the indoor side is continuously provided at the edge of the front piece 29c on the vertical frame 6 side.

  The upper and lower mounting pieces 30 are fixed to the inner surface of the vertical frame 6 on the inner surface of the vertical frame 6 in the vertical direction by screws 33 and the mounting pieces 31 are fixed to the inner surface of the vertical frame 6. Is fixed by a screw 33 to the central portion of the. In addition, the insertion hole of the screw 33 formed in each attachment piece 30 and 31 is made into the elongate hole 34 which faces an up-down direction, and it can adjust now the attachment position of the lock plate 29 up and down.

In the lower part of the lock plate 29, a pin entry groove 35 is formed in which the lower half of the front piece 29c and the lower part of the side piece 29e are cut out to open the outdoor side into which the headed lock pin 28 can enter. Yes.
In addition, above the pin entry groove 35, an engagement groove 36 having a U-shape downward in a side view is formed on the side piece 29 e so as to be continuous with the pin entry groove 35. The groove width of the engaging groove 36 is equal to or slightly larger than the outer diameter so that the shaft portion 27 of the headed lock pin 28 can slide in the vertical direction. FIG. 4 shows a state when the handle 25 is rotated to the lock position with the shoji 3 closed, and in conjunction with the operation of the handle 25, the slide plate 23 and the headed lock pin attached thereto. When the shaft 28 moves upward, the shaft portion 27 of the headed lock pin 28 slides upward in the engagement groove 36 of the lock plate 29 via the pin entry groove 35. Thereby, the movement of the shoji 3 in the opening direction is prevented, and the shoji 3 is locked to the window frame 2.

  On the inner surface of the vertical frame 6 near the indoor side above the lock plate 29, a lowering prevention plate 37 of the shoji 3 having a U-shape facing outward is extended upward and downward from the upper and lower side edges. The attachment pieces 37a and 37a are attached to the inner surface of the vertical frame 6 by fixing them with screws 33. In addition, the insertion hole of the screw 33 formed in both attachment pieces 37a is a long hole 34 that faces in the vertical direction, so that the vertical attachment position of the lowering prevention plate 37 can be adjusted.

  The lowering prevention plate 37 is formed of a heat-resistant metal, for example, stainless steel, and the side piece 37b has a U-shaped locking groove in a side view in which an outdoor side into which a headed locking pin 40 described later enters is opened. 38 is formed. An upward projecting portion 39 projects from the lower edge of the outdoor opening of the locking groove 38. In addition, a downward projection 39 is provided on the upper edge of the opening so that the lowering prevention plate 37 can be used upside down so that it can be used as a left-right difference. The upper protrusion 39 may be omitted.

  A heat-resistant metal headed locking pin 40 is fixed to the outer surface of the downside 11 facing the lowering prevention plate 37 by a long flat head screw 41 reaching the reinforcing member 18 as shown in FIG. Yes. As shown in FIG. 4, the shaft portion 40 a of the headed locking pin 40 enters the intermediate portion in the vertical direction of the locking groove 38 in the lowering prevention plate 37 when the shoji 3 is fastened and locked. is there. At this time, the enlarged-diameter head 40b comes close to the back surface of the side piece 37b. In this case, the positional relationship between the headed locking pin 40 and the headed locking pin 28 is such that the shaft portion 40a of the headed locking pin 40 is lowered to a position where it contacts the lower edge of the locking groove 38. The shaft portion 27 of the headed lock pin 28 is positioned above the lower end of the engagement groove 36 of the lock plate 29 so as not to be separated from the engagement groove 36 (see FIG. 5).

  In the opening and closing window of the first embodiment, the synthetic resin window frame 2 and the window frame 12 are heated by a flame from inside and outside the window in the event of a fire or the like, and the attachment portion of the hinge 20 is softened and locked. When the shoji 3 is lowered with respect to the window frame 2, as shown in FIGS. 4 and 6, the headed locking pin 40 located at the intermediate portion in the vertical direction of the locking groove 38 in the lowering prevention plate 37 is By descending together with 3, the lower end of the shaft portion 40 a comes into contact with the lower edge of the locking groove 38 as shown in FIGS. 5 and 7. Accordingly, the shoji 3 is prevented from further descending, and the shaft portion 27 of the headed lock pin 28 is positioned above the lower end of the engagement groove 36 of the lock plate 29 as described above. Therefore, the lock function of the shoji 3 is not lost and opened, so that there is no risk of burning by a flame approaching from inside or outside the window.

  If the slide plate 23 made of aluminum is melted by heat and the headed lock pin 28 is lowered from the lower end of the engagement groove 36, the lock may be released. Since an upward projecting portion 39 projects from the lower edge of the opening, when the shoji 3 is opened, the shaft portion 40a of the headed locking pin 40 moves in the direction of the arrow in FIG. Since it contacts the projection 39, the shoji 3 is prevented from opening.

FIG. 8 shows a second embodiment of the present invention. In this embodiment, contrary to the first embodiment, the lowering prevention plate 37 is provided on the vertical rod 11 side and the vertical frame 6 side is provided. A head locking pin 40 is provided. In this embodiment, when the shoji 3 sinks, the upper end of the shaft portion 40a of the headed locking pin 40 is the upper edge of the locking groove 38 of the descending prevention plate 37, contrary to the first embodiment. The lowering of the shoji 3 is prevented.
Also, the shoji 3 is prevented from opening by the shaft portion 40 a of the headed locking pin 40 coming into contact with the downward projecting portion 39 of the upper edge of the opening of the locking groove 38.

9 and 10 show a third embodiment of the present invention.
In this embodiment, the lock plate can also be used as a lowering prevention plate, and the front half of the lock plate 42 whose front and rear dimensions are larger than the locking plate 29 of the above embodiment is used as the lowering prevention plate. It is made to have the function of.
That is, a pin entry groove 35 and an engagement groove 36 similar to those of the above embodiment are formed in the rear half of the lock plate 42, and the pin entry groove 35 and the engagement groove are formed in the front half of the side piece 42a of the lock plate 42. 36, a locking groove 38 having a U-shape in side view into which the headed locking pin 40 enters is provided. On the lower edge of the opening of the locking groove 38, an upward protrusion 43 is provided to protrude upward.
The headed locking pin 40 is provided on the outer surface of the vertical hook 11 so as to approach the headed lock pin 28.
According to the third embodiment, the lowering prevention plate 37 as a separate member is not required as in the first embodiment, so that the number of parts and the cost can be reduced.

When the shoji 3 is in the locked state, as shown in FIG. 9, the headed lock pin 28 is positioned near the upper end of the engaging groove 36, and the headed locking pin 40 is positioned in the vertical direction of the locking groove 38. It is located in the middle. In this state, when the shoji 3 is lowered with respect to the window frame 2, the lower end of the shaft portion 40 a of the headed locking pin 40 comes into contact with the lower edge of the locking groove 38 as shown in FIG. 3 is prevented from further descending, and the shaft portion 27 of the headed lock pin 28 is located above the lower end of the engagement groove 36 of the lock plate 42, so that the shoji 3 is prevented from opening. The
Further, when the shoji 3 is to be opened in a state where the shaft portion 27 is moved below the lower end of the engaging groove 38, the shaft portion 40a of the headed locking pin 40 is projected as in the above embodiment. Since it contacts 43, there is no possibility that the shoji 3 will open as in the above embodiment.

As described above, in any of the above-described embodiments, the headed locking pin 40 is provided on one of the opposing surfaces of the vertical rod 11 and the vertical frame 6 opposite to the hinge 20, and the shoji 3 is also provided on the other side. It is possible to prevent the shoji 3 from being lowered and opened in the event of a fire, etc., by simply providing a descending prevention plate 37 having a retaining groove 38 with which the headed retaining pin 40 abuts when the head is lowered. Therefore, it is possible to provide an opening / closing window that is inexpensive and has high fire resistance.
Moreover, since the descent | fall prevention plate 37 and the headed locking pin 40 can be easily retrofitted to the existing opening / closing window, it is possible to take fire prevention measures at low cost for the existing opening / closing window.

The present invention is not limited to the above-described opening / closing window that opens to the outside, but can also be applied to an opening / closing window that opens to the inside of the room, a closed opening / closing window that opens to the outside of the room, and the like.
Further, the present invention can also be applied to an opening / closing window in which the window frame 2 and the window ridge 12 are formed of aluminum or an alloy thereof.

DESCRIPTION OF SYMBOLS 1 Frame 2 Window frame 3 Shoji 4 Upper frame 5 Lower frame 6 Vertical frame 6a Inward protrusion 7 Internal space 8 Reinforcement member 9 Upper rod 10 Lower rod 11 Vertical rod 12 Window rod 12a Outward protrusion 13 Seal member 14 Seal member 15 Window Glass 16 Window glass 17 Internal space 18 Reinforcement member 19 Sealing member 20 Hinge 21 Projection 22 Recess 23 Slide plate 24 Concave 25 Handle (operating means)
26 headed screw 26a diameter-increased head 27 shaft 28 headed lock pin 29 lock plate 29a upper horizontal piece 29b lower horizontal piece 29c front piece 29d rear piece 29e side piece 30 mounting piece 31 mounting piece 32 concave groove 33 screw 34 length Hole 35 Pin entry groove 36 Engagement groove 37 Lowering prevention plate 37a Mounting piece 37b side piece 38 Locking groove 39 Protrusion 40 Headed locking pin 40a Shaft portion 40b Diameter expansion head 41 Countersunk screw 42 Lock plate 42a side piece 43 Protrusion

Claims (8)

Opposite of the window frame provided in the building opening of the building, the sliding door type shoji provided in the window frame, and the vertical frame facing this in the vertical fence on the door-end side constituting the window fence of this shoji A locking pin that projects from the surface and moves in the vertical direction linked to the operating means provided on the window ridge, and is attached to the opposite surface of the vertical frame to the vertical ridge so as to face the locking pin, And a lock plate having a pin entry groove into which the lock pin can enter and an upward engagement groove continuous with the inner part of the pin entry groove, and the lock pin enters the pin when the operation means is operated to the lock position. In the open / close window that can prevent the shoji from opening by moving upward through the groove and entering the engaging groove,
A locking pin protrudes from one of the opposing surfaces of the downboard and the vertical frame, and a vertical direction in which the locking pin can enter when the shoji is closed on the other opposing surface. When the lowering prevention plate having the facing locking groove is attached and the shoji is lowered in the locked state, the lower end of the locking pin descending together with the shoji comes into contact with the lower edge of the locking groove of the lowering prevention plate, or An opening / closing window characterized in that the upper edge of the locking groove of the lowering prevention plate descending together with the shoji is in contact with the upper end of the locking pin, thereby preventing the lock pin from being detached from the engagement groove. .   At the opening of the locking groove on the side where the locking pin enters, an upward protrusion that continues to the lower edge of the locking groove or a downward protrusion that continues to the upper edge of the locking groove is projected and locked. 2. The opening / closing window according to claim 1, wherein the locking pin contacting the lower edge or the upper edge of the groove can be prevented from being detached from the locking groove.   The opening / closing window according to claim 1 or 2, wherein the locking pin and the lowering prevention plate are provided at positions close to the lock plate or the lock pin, respectively.   The lock plate is shared as a lowering prevention plate by providing a locking groove in the back of the pin entry groove and the engagement groove in the lock plate so as to be continuous with the pin insertion groove and the engagement groove. The opening / closing window according to claim 1 or 2.   The locking pin is a headed locking pin having a head having a diameter larger than that of the shaft portion, and the head engages with the back surface of the edge of the locking groove. The opening / closing window according to any one of 4 above.   The opening / closing window according to any one of claims 1 to 5, wherein the locking pin and the lowering prevention plate are attached to the window frame or the window ridge with screws screwed from outside. In an opening / closing window provided with a window frame provided at a building opening of a building, a sliding door type shoji provided in the window frame, and a lock device for locking the shoji,
A locking pin protrudes from one of the mutually facing surfaces of the vertical fence on the door-end side constituting the window fence of the shoji and the vertical frame facing the vertical fence, and the other opposed A lowering prevention plate having a vertically extending locking groove into which the locking pin can enter when the shoji is closed is attached to the surface, and when the shoji is lowered to a predetermined position in the locked state, it is lowered with the shoji. The lower end of the locking pin abuts the lower edge of the locking groove of the lowering prevention plate, or the upper edge of the locking groove of the lowering prevention plate descending with the shoji comes into contact with the upper end of the locking pin, An opening / closing window characterized in that the sliding door is prevented from descending from a predetermined position.   At the opening of the locking groove on the side where the locking pin enters, an upward protrusion that continues to the lower edge of the locking groove or a downward protrusion that continues to the upper edge of the locking groove is projected and locked. 8. The opening / closing window according to claim 7, wherein the locking pin contacting the lower edge or the upper edge of the groove can be prevented from being detached from the locking groove.

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