JP2020133117A - Opening restriction stopper - Google Patents

Abstract

To provide an opening restriction stopper capable of securing safety by making the opening angle of a window constant, fully opening the window by a simple operation in an emergency, and preventing the window from being fully opened in an unexpected manner.SOLUTION: Included are a sash bracket 16 fixed to a sash 14 that is attached to a window frame 12 via a rotary shaft and a frame bracket 18 fixed to the window frame 12. An arm 22 is rotatably mounted on the sash bracket 16, and a cylindrical body 20 is rotatably provided on the frame bracket 18. One end of the arm 22 is inserted into an opening 25 formed at the end in the longitudinal direction of the body 20 in a projectable/retractable manner within a predetermined length range, and locks the arm 22 to the body 20 in the projected state. The frame bracket 18 has a shaft part 26 attached to the body 20, and the body 20 has a release plate 66 for locking the shaft part 26 and releasing the locking by moving it. A protective cover 86 covering the release plate 66 and detachable by a predetermined force or more is provided.SELECTED DRAWING: Figure 1

Description

The present invention is interposed between a window frame that is fixed to an opening in a building and a hinged window that is rotatably attached to the window frame via a longitudinal or lateral hinge. The present invention relates to an opening limit stopper for holding this hinged window at a predetermined opening angle when the window is opened.

Conventionally, the opening restriction stopper for a hinged window, which is rotatably attached to a window frame via a hinge, is a window frame fixed to an opening of a building and a vertical or horizontal hinge to the window frame. It is installed between the hinged windows that are rotatably attached. During normal use, the hinged window is opened at a predetermined angle for ventilation and the angle is locked. When closing the window, unlock it and close the window.

Since such an opening restriction stopper is configured to automatically lock when the opening angle is reached when the opening window is opened from the closed state, the opening cannot be opened any further. However, a structure for unlocking by a predetermined operation is provided, and the hinged window can be fully opened in case of an emergency such as maintenance or fire.

For example, the opening / closing adjuster for the vertical axis rotating window disclosed in Patent Document 1 includes a main body fixed to a shoji frame, and the main body can swing freely with a ball joint structure at the end of an arm protruding from the case. In addition, a rotatably attached shoji bracket and a stopper member provided in the hollow portion of the case and which stops the sliding operation by engaging with the arm positioning portion when the arm slides and protrudes from the case by a predetermined length. It is equipped with an arm positioning mechanism having the above. The arm positioning mechanism includes a guide that is attached to the front opening of the case and has an insertion port for guiding the stopper release member to the inside, and a stopper substrate that moves integrally with the stopper pin. The stopper pin is a stopper substrate. When the stopper release member is inserted from the inlet while the arm is housed in the case, the upper surface of the stopper substrate is locked by the stopper release member, and the head of the stopper pin is raised. It is held at a position where it does not fit into the arm positioning hole.

Further, the horizontal axis rotating window opening device disclosed in Patent Document 2 pivotally connects a rotating arm rotatably attached to the window frame and a linkage lock attached to the lower end of the metal shoji, and engages between the two. The rotating window can be opened by removing the case and rotating the metal shoji. The rotary arm and the linkage lock are pivotally connected by projecting and inserting the cylinder part, and the protruding cylinder part is pulled back to release the pivotal connection. At the same time, the lock operation with a key is performed. It can also be done by operating the push pin.

Japanese Patent No. 5495755 JP-A-11-62350

In the device of Patent Document 1 of the above background technology, in order to open the window widely, the positioning of the arm must be released and licked by using the stopper release member, and the quick opening operation cannot be performed, so that the stopper can be released. If the member is not nearby or is lost, the window may not be wide open even in an emergency.

Further, in the case of the device of Patent Document 2 of the above background technology, the linkage lock can be released by a key or a push pin using a cylinder lock, and the mechanism of the cylinder lock is complicated, so that the release operation may not be performed smoothly. is there. Furthermore, if the push pin is accidentally pushed, there is a risk that the window will be completely opened and a person will fall, which is not desirable from the viewpoint of safety.

The present invention has been made in view of the above-mentioned problems of the background technology. In normal times, the opening angle of the window is kept constant to ensure safety, and in an emergency, the entire window is opened in a short time by a simple operation. The purpose is to provide an opening restriction stopper that can prevent the entire surface from being opened carelessly.

The present invention is provided with a shoji bracket fixed to the shoji and a frame bracket fixed to the window frame of a hinged window in which a shoji is attached to the window frame via a rotation shaft, and the arm rotates on the shoji bracket. The frame bracket is rotatably attached to the frame bracket so that the end of the arm opposite to the shoji bracket is an opening formed in the longitudinal end of the main body. It is an opening restriction stopper that can be inserted into the window and can be retracted within a predetermined length range, and the arm is locked to the main body in a protruding state. The frame bracket is provided with a shaft portion to be attached to the main body, and the main body has a release plate that locks the shaft portion and releases the lock by moving the shaft portion, and moves over the release plate. A protective cover is provided to prevent this. The protective cover is made of acrylic or the like, has an appropriate hardness, and can be removed by breaking or the like with a force exceeding a certain level.

A flange portion is provided at the tip of the shaft portion so as to project in a direction intersecting the axial direction. The surface direction of the release plate is provided so as to intersect the axial direction of the shaft portion, and the release plate is provided with a locking hole into which the tip of the shaft portion is inserted and locked. .. The locking hole is formed by communicating with each other a great circle portion through which the flange portion can pass and a small circle portion through which the shaft portion can pass but cannot pass through the flange portion. By moving the circle portion and the small circle portion in the communication direction, the flange portion is locked to the small circle portion, and the flange portion passes through the great circle portion and is separated from each other. Switch the release state.

The main body is covered with a case such as a square cylinder, and a through hole through which the shaft portion is inserted is formed on the back surface of the case in the vicinity of the opening on the side where the frame bracket of the case is attached. On the pair of side surfaces intersecting the back surface, slits through which the release plate is slidably inserted are provided at positions facing each other. A cap member is provided inside the opening, and the cap member is integrally provided with a closing plate portion for closing the opening and a locking plate portion inserted into the inside of the case. The locking plate portion is provided with a fitting hole that communicates with the through hole on the back surface and an insertion portion that communicates with the pair of slits on the pair of side surfaces and communicates with the inner peripheral surface of the fitting hole. The shaft portion passes through the through hole of the case and is inserted into the fitting hole, and the release plate is slidably held by the slit of the case and the insertion portion. The tip of the inserted shaft portion is inserted into the locking hole of the release plate, and the release plate is moved along the insertion portion to form the great circle portion and the small circle of the locking hole. Switch the position of the part.

A part of the locking plate portion of the cap member is fixed to the case via a fixing member with a screw or a pin, and the fixing member is located on a side edge portion of the release plate along the sliding direction. A guide recess is formed in the side edge portion to avoid the fixing member, and a part of the fixing member is inserted inside the guide recess. The guide recess is formed to have a predetermined length along the side edge portion, and the release plate is restricted in the moving length in the sliding direction within a range in which the fixing member is located inside the guide recess, and is prevented from falling off. prevent.

A part of the release plate projects outward from the slit formed on one of the pair of side surfaces of the case, and the protruding portion is an operation portion for sliding the release plate. The protective cover covers the front surface of the case and the other of the pair of side surfaces, and the one side surface has a space for accommodating the operation portion of the release plate protruding from the slit. One side surface that is formed on the side surface continuous with the case and overlaps the other side surface of the case is fixed to the other side surface.

The opening restriction stopper of the present invention ensures safety by keeping the opening angle of the window constant in normal times, and in an emergency, the entire window can be opened in a short time by a simple operation. Since the operation unit for opening the entire surface is covered with a protective cover, it is prevented from being accidentally opened completely. Further, the protective cover can be broken with a certain force or more, and can be broken to expose the operation portion so that it can be operated, which is convenient without using a separate member such as a key.

It is a front view of the opening restriction stopper of one Embodiment of this invention. It is a right side view of the opening restriction stopper of this embodiment. It is a rear view of the opening restriction stopper of this embodiment. It is a perspective view (a) which shows the use state of the opening restriction stopper of this embodiment, and is the perspective view (b) which shows the state disassembled by a key. It is a perspective view (a) which shows the state which exposed the operation part by breaking the protective cover of the opening restriction stopper of this embodiment, and is the perspective view (b) which shows the state which pushed the operation part and disassembled. It is a partially enlarged vertical sectional view (a) which shows the locked state of the opening restriction stopper of this embodiment, and is a cross-sectional view taken along line AA of the partially enlarged vertical sectional view (a). It is a partially enlarged vertical sectional view (a) which shows the unlocked state of the opening restriction stopper of this embodiment, and BB line cross-sectional view of the partially enlarged vertical sectional view (a). It is a perspective view which shows the disassembled state of the opening restriction stopper of this embodiment. It is a front view (a) and a right side view (b) of the cap member of the opening restriction stopper of this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 6 show an embodiment of the present invention, in which the opening restriction stopper 10 of this embodiment has a window frame 12 fixed to an opening of a building and a hinge in the vertical direction to the window frame 12. The sash 14 is held at a predetermined angle when the sash 14 is opened by being interposed between the sash 14 and the sash 14 rotatably attached via the sash.

The opening restriction stopper 10 is attached to a shoji bracket 16 for attaching to the shoji 14, a frame bracket 18 for attaching to the window frame 12, a square tubular main body 20 having one end pivotally supported by the frame bracket 18, and the main body 20. An arm 22 inserted so as to be expandable is provided. The end of the arm 22 protruding from the main body 20 is connected to the shoji bracket 16 via a ball joint 21. The end portion inserted into the main body 20 is automatically locked by a stopper member 78, which will be described later, at a position where the end portion is pulled out to a predetermined length. Then, the lock is released by pressing the button 82 described later. A brake rubber 17 that is in close contact with the shoji 14 is attached to the shoji bracket 16.

Here, the frame bracket 18 will be described. The frame bracket 18 is a plate body, and is bent at 90 ° with a fold ruled line passing substantially in the center. A shaft portion 26 that pivotally supports the main body 20 is fixed to one of the bent surfaces 18a. The shaft portion 26 is columnar and is provided so as to project at a right angle to the surface 18a, and a flange portion 28 projecting at a right angle to the axial direction is provided at the tip opposite to the surface 18a. There is. The end of the shaft portion 26 opposite to the flange portion 28 is fitted and fixed to a through hole formed in the surface 18a. A coil spring 30 is attached to the side peripheral surface of the shaft portion 26. A washer 32 is provided between the coil spring 30 and the flange portion 28 of the shaft portion 26. One end of the coil spring 30 abuts on the surface 18a of the frame bracket 18, the other end abuts on the washer 32, and is compressed when the washer 32 comes close to the surface 18a. The surface 18b of the frame bracket 18 other than the surface 18a is provided with three through holes 19 for screws 29, which are fixing members attached to the window frame 12. The screw 29, which is a fixing member, may be a pin.

Next, the main body 20 will be described. The main body 20 is covered with a square tubular case 24. The case 24 is provided with the front surface 24a, the right side surface 24b, the back surface 24c, and the left side surface 24d connected to each other at 90 °. The case 24 has openings 25 and 27 at both ends, and an arm 22 is slidably inserted from one of the openings 25 and housed inside the hollow.

The front surface 24a of the case 24 is provided with a rectangular through hole 38 in the vicinity of the opening 25 to which a button 82, which will be described later, can be retractably attached. On the right side surface 24b and the left side surface 24d, slits 35 and 36 to which the release plate 66 described later is slidably attached are provided in the vicinity of the opening 27 on the frame bracket 18 side of the case 24 on the side opposite to the opening 25. They communicate with each other inside and outside, and are provided at positions facing each other. The slit 35 is formed on the right side surface 24b and is formed long in the insertion direction of the case 24. The slit 36 is formed on the left side surface 24d, is formed longer in the insertion direction of the case 24, and is shorter than the slit 35. Through holes 40 through which screws 29 for attaching the reinforcing plate 60, which will be described later, are inserted are provided at positions of the slits 35 and 36 opposite to the opening 27. Further, the left side surface 24d is provided with a through hole 42 through which a screw 29 for attaching a protective cover 86, which will be described later, is inserted, at a position close to the front surface 24a alongside the slit 36. A through hole 43 through which the shaft portion 26 of the frame bracket 18 is inserted is provided in the vicinity of the opening 27 on the back surface 24c. A through hole 45 through which a screw 29 for attaching a cap member 34, which will be described later, is inserted is provided at a position slightly away from the opening 27 from the through hole 43. In the vicinity of the opening 25 of the back surface 24c, three through holes 44 through which screws 29 for attaching the cap member 76, which will be described later, are inserted are provided.

A hard synthetic resin cap member 34 is fitted into the opening 27 of the case 24 on the frame bracket 18 side and closed. As shown in FIG. 9, the cap member 34 is provided with a closing plate portion 46 that closes the opening 27 of the case 24, and the closing plate portion 46 is a rectangle that is long in one direction. The closing plate portion 46 is integrally provided with a locking plate portion 48 inserted inside the case 24. The locking plate portion 48 is a plate body erected at a right angle to the surface direction of the closing plate portion 46, and the surface direction of the locking plate portion 48 is parallel to the longitudinal direction of the closing plate portion 46. is there. The direction parallel to the closing plate portion 46 is the short side, and the length of the short side is slightly shorter than the longitudinal direction of the closing plate portion 46. The length perpendicular to the closing plate portion 46 is the long side, which is about twice as long as the short side. An insertion portion 50 penetrating along the short side direction is provided at an intermediate portion of the locking plate portion 48 in the thickness direction that intersects the short side and the long side. A fitting hole 52 penetrating in the thickness direction is formed in the center of the surface of the locking plate portion 48. The fitting hole 52 is for inserting the shaft portion 26 of the frame bracket 18 and the coil spring 30, and is formed in a large cylindrical shape through which the shaft portion 26 and the coil spring 30 can be inserted, and is formed on the inner peripheral surface of the fitting hole 52. Is communicated with the insertion portion 50. A through hole 54 through which a screw 29 to be assembled to the back surface 24c of the case 24 is inserted is provided at a position slightly away from the closing plate portion 46 than the fitting hole 52. About half of the through hole 54 extends over the insertion portion 50 and communicates with the insertion portion 50, and a part of the side peripheral surface of the screw 29 is exposed to the insertion portion 50. The base end portion 48a of the locking plate portion 48 continuous with the closing plate portion 46 is inclined so as to be thicker than the thickness of other portions of the locking plate portion 48. The direction of inclination is a direction that approaches the back surface of the front surface 24a of the case 24 when the cap member 34 is attached to the opening 27 of the case 24. A space for weight reduction and the like is formed in the base end portion 48a so as to communicate with the insertion portion 50, and a plate-shaped spring 58 is provided in the space along the short side direction of the locking plate portion 48. Has been done. Near the center of the spring 58 in the longitudinal direction, a protrusion 58a bent so as to project toward the fitting hole 52, that is, away from the closing plate portion 46 is formed. The shape of the closing plate portion 46 is a rectangle that matches the rectangle formed on the outer peripheral surface of the case 24, and a step portion 46a that matches the inner peripheral surface of the case 24 and is in close contact with the case 24 is circled on the side peripheral surface. It is formed.

A reinforcing plate 60 is provided between the case 24 and the locking plate portion 48 of the cap member 34. The reinforcing plate 60 is a plate body of the case 24 bent in a U shape along the right side surface 24b, the left side surface 24d, and the back surface 24c, and has a length extending from the opening 27 of the case 24 to slightly above the through hole 40. That's right. A pair of through holes 62 communicating with the through holes 40 and a through holes 64 corresponding to the through holes 42 are provided. Further, the portion facing the slits 35 and 36 and the portion facing the through hole 43 are notched.

A release plate 66 is attached to the slits 35 and 36 of the case 24. The release plate 66 is a plate having a thickness that can be inserted into the slits 35 and 36, and has a length that penetrates the right side surface 24b and the left side surface 24d. The release plate 66 is a plate body long in the direction penetrating the right side surface 24b and the left side surface 24d, and one end portion 66a in the longitudinal direction is bent at 90 ° with a fold ruled line substantially parallel to the end portion 66a. , It becomes an operation unit 67 when pushing the release plate 66. A locking hole 68 into which the shaft portion 26 of the frame bracket 18 is inserted and locked is formed on the wider surface of the release plate 66 other than the operating portion 67. In the locking hole 68, a great circle portion 68a larger than the flange portion 28 of the shaft portion 26 and a small circle portion 68b larger than the cross-sectional shape of the shaft portion 26 and smaller than the flange portion 28 are arranged in a straight line. It is a shape that communicates with each other. The boundary between the great circle portion 68a and the small circle portion 68b is formed by a straight line having the same width as the diameter of the small circle portion 68b, and the shaft portion 26 can pass through. A straight line in which the diameters of the great circle portion 68a and the small circle portion 68b are arranged is formed along the longitudinal direction, and the great circle portion 68a is located near the end portion 66a. By moving the release plate 66 in the longitudinal direction, the positions of the great circle portion 68a and the small circle portion 68b are switched, and the flange portion 28 of the shaft portion 26 is locked to the small circle portion 68b, and the flange portion. The unlocked state in which 28 passes through the great circle portion 68a and is separated is switched.

The end 66b of the release plate 66 on the opposite side of the end 66a is parallel to the end 66a, and the length between the fold ruled line separating the operation portion 67 and the end 66b is the right side of the case 24. It is longer than the length between the surface 24b and the left surface 24d. The release plate 66 is inserted and attached to the slits 35 and 36 of the case 24 at the time of assembly, the end portion 66a is located on the slit 35 side, and the end portion 66b is located on the slit 36 side. Further, the operation portion 67 formed by bending the end portion 66a is bent toward the front surface 24a. The side edges 66c and 66d connecting the end 66a and the end 66b are parallel to each other and perpendicular to the ends 66a and 66b. When attached to the case 24, the surface direction of the release plate 66 is parallel to the front surface 24a and the back surface 24c of the case 24, and is slidable to the insertion portion 50 of the cap member 34 attached to the inside of the case 24. It is plugged in.

One side edge portion 66c of the release plate 66 is located near the opening 27 of the case 24 when attached to the case 24 and the cap member 34. A recess 70 is provided in the side edge portion 66c, and the position of the recess 70 is such that the protrusion 58a of the spring 58 is inserted when the small circle portion 68b of the locking hole 68 coincides with the fitting hole 52 of the cap member 34. It is the position to be. As a result, when the small circle portion 68b of the locking hole 68 coincides with the fitting hole 52 of the cap member 34, the protrusion 58a of the spring 58 is inserted into the recess 70 and locked with a light force to be positioned. A guide recess 74 is provided in the side edge portion 66d opposite to the side edge portion 66c. The guide recess 74 is a screw 29 exposed to the insertion portion 50 when the cap member 34 and the case 24 are assembled by inserting the screw 29 into the through hole 54 of the cap member 34 and the through hole 45 of the back surface 24c of the case 24. A part of the side peripheral surface of is inserted. The guide recess 74 is formed long along the side edge portion 66d, and a screw 29a is inserted into one end portion when the small circle portion 68b of the locking hole 68 coincides with the fitting hole 52 of the cap member 34. The opposite end is the position where the screw 29a is inserted when the great circle portion 68a coincides with the fitting hole 52. The side edge portions 66c and 66d are provided with a step portion 72 in which the width of the release plate 66 is narrowed at a position close to the end portion 66b. Since the end 66b side of the step 72 is thinner, it can be inserted into the slit 36, and because the end 66a side of the step 72 is thick, it cannot pass through the slit 36, and the step 72 is the peripheral edge of the slit 36. It touches and stops.

A hard synthetic resin cap member 76 is fitted into the opening 25 of the case 24 on the side of the shoji bracket 16 and closed. The cap member 76 is formed with an insertion port 79 through which the arm 22 is slidably inserted and an insertion port 80 through which the key 84 described later is inserted. The cap member 76 holds a stopper member 78 located on the back surface 24c side of the arm 22 and a button 82 located on the front surface 24a side. When the arm 22 slides and the through hole 22a near the end of the arm 22 is located, the stopper member 78 and the button 82 are inserted into the through hole 22a to lock each other and lock the extending length of the arm 22. Is what you do. When the button 82 is pressed, the lock is released, the arm 22 becomes slidable, and can be put into the case 24. However, it does not slide in the pulling direction and prevents it from falling off. When a key 84 having a predetermined shape is inserted into the insertion port 80 of the cap member 76, the stopper member 78 is released from the lock with the arm 22, the arm 22 falls out of the case 24, and the arm 22 and the main body 20 are separated. Will be done. The cap member 76 is attached by inserting screws 29 into the three through holes 44 on the back surface 24c of the case 24.

In the vicinity of the opening 27 of the case 24, a protective cover 86 that covers the front surface 24a, the right side surface 24b, and the left side surface 24d in a U shape is attached. The protective cover 86 is made of a synthetic resin that can be broken by applying a strong force, for example, made of acrylic. The protective cover 86 has a rectangular side surface 86a that is overlapped with the front surface 24a, a side surface 86d that is overlapped with the left side surface 24d, and a side surface 86b that is parallel to the right side surface 24b and is separated from the right side surface 24b and covers the release plate 66 in the assembled state. Is U-shaped. Further, side surfaces 86e covering the release plate 66 are provided on both side edges of the side surface 86b. A through hole 88 for a screw 29 is provided on the side surface 86d.

To attach the protective cover 86 to the case 24, align the through hole 88 on the side surface 86d with the through hole 42 on the left side surface 24d of the case 24, and attach the protective cover 86 with screws 29. The operation portion 67 of the release plate 66 projecting outward from the slit 35 of the case 24 is protected by being surrounded in four directions by the side surfaces 86a, 86b, 86e of the protective cover 86.

Next, a method of assembling the opening limit stopper 10 will be described. The cap members 34 and 76, the reinforcing plate 60, the release plate 66, the stopper member 78, and the button 82 are assembled in a predetermined order on the case 24 to form the main body 20. The shoji bracket 16, the arm 22, the frame bracket 18, and the protective cover 86 are assembled on the main body 20 in a predetermined order to serve as the opening restriction stopper 10. At this time, as shown in FIG. 6, the operating portion 67 protrudes from the right side surface 24b of the case 24, and in the release plate 66, the small circular portion 68b of the locking hole 68 coincides with the fitting hole 52 of the cap member 34. The flange portion 28 of the shaft portion 26 of the frame bracket 18 is locked, and the main body 20 and the frame bracket 18 are connected. The protrusion 58a of the spring 58 of the cap member 34 is inserted into the recess 70 of the release plate 66 and does not move.

Next, a method of using the opening restriction stopper 10 will be described with reference to FIG. The frame bracket 18 is applied to the corner of the window frame 12, and the screw 29 is inserted into the through hole 19 to attach the frame bracket 18. The orientation of the frame bracket 18 can be changed around the axis of the shaft portion 26, and is adjusted to the window frame 12 to be attached. Then, the shoji bracket 16 is fixed to the shoji 14.

When opening the shoji 14, the arm 22 is extended from the case 24 as the shoji 14 opens. When the through hole 22a of the arm 22 reaches the button 82 and the stopper member 78, the arm 22 is locked and the extension length of the arm 22 is automatically locked. When closing the window frame 12, the lock is released by pressing the button 82 and shortened.

For cleaning and maintenance, as shown in FIG. 4 (a), the key 84 is inserted into the insertion port 80 of the cap member 76 to release the lock between the arm 22 and the main body 20, and as shown in FIG. 4 (b). Can be separated. After cleaning and maintenance, it can be restored by a predetermined operation.

In the event of an emergency such as a fire, as shown in FIG. 5A, the side surface 86b side of the protective cover 86 is raised to be destroyed and removed to expose the operating portion 67 of the release plate 66. Then, the operating portion 67 is pushed into the case 24, the release plate 66 is moved, and the great circle portion 68a of the locking hole 68 is aligned with the fitting hole 52 of the cap member 34. As shown in FIG. 7, the flange portion 28 of the shaft portion 26, which is locked to the small circle portion 68b of the locking hole 68, is located at the great circle portion 68a and comes off without being locked. As a result, as shown in FIGS. 5B and 8, the main body 20 and the frame bracket 18 are separated, and the shoji 14 is opened. The protrusion 58a of the spring 58 of the cap member 34 is inserted into the recess 70 of the release plate 66, and the spring 58 can be elastically deformed and moved by pushing the operation portion 67 with a strong force.

The release plate 66 can freely slide when the shaft portion 26 is eliminated. However, it is possible to slide within the range where the screw 29 is located in the guide recess 74 of the release plate 66, and the sliding length is restricted. Therefore, the release plate 66 does not come off from the right side surface 24b slit 35 of the case 24.

When returning to the original position, the shaft portion 26 is inserted and the release plate 66 is pulled in the protruding direction to be locked again. The destroyed protective cover 86 is removed by removing the screw 29, and a new protective cover 86 is attached and used.

According to the opening restriction stopper 10 of this embodiment, the opening angle of the shoji 14 can be kept constant in normal times to ensure safety, and in an emergency, the shoji 14 can be fully opened in a short time by a simple operation. Since the operation unit 67 that is fully opened is covered with the protective cover 86, it is possible to prevent the operation unit 67 from being completely opened carelessly. It is safe without causing a fall accident. Further, the protective cover 86 can be broken with a force equal to or higher than a certain level, and can be broken to expose the operation unit 67 so that it can be operated. The protective cover 86 is made of acrylic, has an appropriate strength, and can be easily broken by applying a strong force. The destroyed protective cover 86 can be discarded, replaced with a new one, and the release plate 66 can be replaced by replacing it.

The structure of the release plate 66 is extremely simple and highly reliable, and in an emergency, the release restriction stopper 10 can be easily released by simply pushing the operation unit 67 into the case 24. It can be operated in a short time without using a separate member such as the key 84, and it is convenient because it does not take time to prepare the key 84 or check the insertion port 80. During cleaning and maintenance other than in an emergency, the entire surface can be opened with the key 84, and the protective cover 86 is not destroyed. When the main body 20 and the frame bracket 18 are separated, the release plate 66 can slide freely, but since the screw 29 is located in the guide recess 74, the release plate 66 does not come off from the case 24 and is lost. prevent.

The opening restriction stopper of the present invention is not limited to the above embodiment, and the shape and size of each member can be changed as appropriate. The orientation of the release plate may also be one in which the left and right sides are reversed from those in the above embodiment and inserted into the slit. The shape of the main body and the case may be a circle or an elliptical oval shape as well as a quadrangular cross section, and the case may be a semi-cylindrical shape. The shape and orientation of the shoji bracket and the frame bracket can be changed according to the shape of the shoji and the window frame. The shape of the release plate may be such that the shaft portion of the frame bracket is securely locked and released. The shape of the protective cover may be such that it surely covers the release plate and is easily broken in an emergency.

10 Opening limit stopper 12 Window frame 14 Shoji 16 Shoji bracket 18 Frame bracket 20 Main body 22 Arm 24 Case 24a Front 24b Right side 24c Back 24d Left side 25, 27 Opening 26 Shaft 28 Flange 29 Screw 34 Cap member 35, 36 Slit 43 Through hole 46 Closing plate part 48 Locking plate part 50 Insertion part 52 Fitting hole 66 Release plate 66d Side edge part 67 Operation part 68 Locking hole 68a Large circle part 68b Small circle part 74 Guide recess 86 Protective cover

Claims (5)

A shoji bracket fixed to the shoji and a frame bracket fixed to the window frame of the hinged window in which the shoji is attached to the window frame via a rotation shaft are provided, and the arm is rotatably attached to the shoji bracket. , A tubular body is rotatably attached to the frame bracket,
The end of the arm opposite to the shoji bracket is inserted into an opening formed at the end in the longitudinal direction of the main body, and can be recessed within a predetermined length range, and is in a protruding state. The arm is locked to the main body with
The frame bracket is provided with a shaft portion to be attached to the main body, and the main body has a release plate that locks the shaft portion and releases the lock by moving the shaft portion, and moves over the release plate. A protective cover is provided to prevent
The protective cover is an opening restriction stopper characterized by having an appropriate hardness and being removable with a certain force or more. A flange portion is provided at the tip of the shaft portion so as to project in a direction intersecting the axial direction.
The surface direction of the release plate is provided so as to intersect the axial direction of the shaft portion.
The release plate is provided with a locking hole into which the shaft portion is inserted and locked, and the locking hole includes a great circle portion through which the flange portion can pass and the flange through which the shaft portion can pass. The portion is formed by communicating small circle portions that cannot pass through each other, and by moving the release plate in the communication direction between the great circle portion and the small circle portion, the flange portion engages with the small circle portion. The release limiting stopper according to claim 1, which switches between a locked state in which the flange portion is stopped and an unlocked state in which the flange portion passes through the great circle portion and is separated. The main body is covered with a case, and a through hole through which the shaft portion is inserted is formed on the back surface of the case in the vicinity of the opening on the side where the frame bracket of the case is attached, and intersects the back surface. Slits into which the release plate is slidably inserted are provided on the pair of side surfaces at positions facing each other.
A cap member is provided inside the opening of the case, and the cap member is fitted through the fitting hole communicating with the through hole on the back surface and the pair of slits on the pair of side surfaces. An insertion portion communicating with the inner peripheral surface of the joint hole is provided, the shaft portion passes through the through hole of the case and is inserted into the fitting hole, and the release plate is inserted into the slit of the case and the insertion portion. The tip of the shaft portion slidably held by the portion is inserted into the locking hole of the release plate, and the release plate is moved along the insertion portion to cause the locking hole. The opening restriction stopper according to claim 1, wherein the positions of the large circle portion and the small circle portion of the above are switched. The cap member is fixed to the case via a fixing member, the fixing member is located on a side edge portion of the release plate along the sliding direction, and the side edge portion is a guide for avoiding the fixing member. A recess is formed, and a part of the fixing member is inserted inside the guide recess.
The guide recess is formed to have a predetermined length along the side edge portion, and the release plate is restricted in the moving length in the sliding direction within a range in which the fixing member is located inside the guide recess, and is prevented from falling off. The opening restriction stopper according to claim 1. A part of the release plate protrudes outward from the slit formed on one of the pair of side surfaces of the case, and the protruding portion is an operation portion for sliding the release plate.
The protective cover covers the front surface of the case and the other of the pair of side surfaces, and the one side surface has a space for accommodating the operation portion of the release plate protruding from the slit. The opening restriction stopper according to claim 1, wherein one side surface which is formed by a side surface continuous with the case and overlaps the other side surface of the case is fixed to the other side surface.

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