JP2005232964A - Opening apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sash unsusceptible to wear and damages and having improved durability, where whether the inner and outer sashes are at a normal closure position is sensed by utilizing the rotation of a crescent lock handle, and the crescent lock handle can be rotated in the direction to lock the sashes only when they are at the normal closure position. <P>SOLUTION: A crescent lock 10 having a larch 9 that extends toward an outer sash 4 while moving by the rotation of a handle 8 is provided at a meeting part 5c of the inner sash 3 where to sashes meet, and a crescent receiver 11 with which the latch 9 engages is provided at a meeting part 6c of the outer sash 4 where the two sashes meet. A irrotation system 14 is provided on the handle rotation side including the latch 9 to prevent the handle 8 from rotating in excess of a predetermined angle between the positions of crescent unlock and lock, and a release system 15 for releasing the irrotation system 14 by a reaction force to the handle 8 rotating and bringing into contact with the crescent receiver 11 in order to rotate the handle 8 to the locking position, when the inner and outer sashes 3 and 4 are at the normal closure position, and a spring 34 for giving or not giving impetus to the handle 8 in the direction of unlocking or locking position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sash provided with a crescent lock, and more particularly, to a sash capable of performing a locking operation of the crescent lock only when the inner and outer shojis are in a normally closed position.

  Generally, a sash such as a sliding window is equipped with a crescent lock that fixes the inner and outer shojis to each other in a closed position for the purpose of crime prevention. This crescent lock is provided on a summing pad for a shoji and has a hanging part (also referred to as a crescent) that rotates while rotating the handle. An engaging crescent receiver (also referred to as a receiving metal fitting) is provided.

  However, the sash having the crescent lock is configured to be able to rotate the handle of the crescent lock not only when the inner and outer shojis are in the normal closed position but also when in the open position. Therefore, if you open or close the inner and outer shojis with the handle rotated in the locking direction, that is, with the hooks extending to the side of the handicap, the hooks and the vertical arm of the handbags will collide. As a result, there is a problem in that it is deformed or damaged, leading to a decrease in durability.

  In order to solve the above problem, there has been proposed a crescent lock in which the handle of the crescent lock is not rotated in the locking direction except when the inner and outer shojis are in the normal closed position (Japanese Utility Model Publication No. 57-52303). No. publication, Japanese Utility Model Publication No. 58-25467, etc.). This crescent lock has a protruding portion (sensing portion) that prevents the handle from rotating in a state of protruding to the side of the external obstacle, and when the inner and external obstacles are closed, the protruding portion is the external obstacle. The rotation preventing state of the handle is released by being immersed in contact with the summoning bowl.

No. 57-52303 Japanese Utility Model Publication No. 58-25467

  However, in the sash provided with the above-described crescent lock, the protruding portion comes into contact with the vertical arm of the external obstacle whenever the internal or external obstacle is opened or closed. For this reason, there exists a malfunction which tends to receive wear and damage to the said protrusion part, the vertical shaft of an external shoji, etc., and causes the fall of durability.

  The present invention has been made to solve the above-described problem, and detects whether the inner and outer shoji are in the normal closed position by using the rotation of the handle of the crescent lock, and is in the normal closed position. It is an object of the present invention to provide a sash that can rotate the handle only to the locked position, is less susceptible to wear damage, and can improve durability.

  According to the present invention, a crescent lock having a hanging portion that extends to the side of the handicapped child while being rotated by the rotation of the handle is provided on the calling pad of the inner shoji, and the hook is engaged with the calling pad of the outer hand child. A crescent receptacle is provided, and a rotation prevention mechanism for preventing the handle from rotating more than a predetermined angle in the locking direction is provided, and the handle is rotated when the inner and outer obstacles are in a normally closed position. It is a sash characterized by providing a release mechanism that releases the rotation prevention mechanism by a reaction force that abuts on a crescent receptacle or a handbag of a shoji.

  The present invention provides a crescent lock having a hanging portion that extends while rotating by the rotation of a handle on a summing child's summon cage, and a crescent receptacle that engages the above-mentioned hanging portion on a summing child's summit rod. An oscillating body capable of oscillating is provided on the rotating side including the hanging portion, and one end of the oscillating body is engaged with an engaging portion provided on the fixed side to prevent the handle from rotating more than a predetermined angle. In addition, when the inner and outer shojis are in the normal closed position, the other end of the rocking body is brought into contact with the crescent receptacle or the handbag of the outer shingles by turning the handle. The sash is configured to release the locked state between the one end and the locking portion.

  According to the present invention, the sash is characterized in that the oscillating body is pivotally supported on a rotating side including the hooking portion, and the other end of the oscillating body is urged in a protruding direction by a return spring. It is.

  The present invention provides a crescent lock having a hanging portion that extends while rotating by the rotation of a handle on a summing child's summon cage, and a crescent receptacle that engages the above-mentioned hanging portion on a summing child's summit rod. A sliding body that is slidable in the radial direction is provided on the rotating side including the hook portion, and a claw portion provided on the sliding body is engaged with an engaging portion provided on the fixed side, so that the predetermined handle With the reaction force that prevents the rotation beyond the angle and the sliding body comes into contact with the crescent receptacle or the handbag of the external obstacle by the rotation of the handle when the inner and outer obstacles are in the normally closed position. The sash is configured to release the locked state between the claw portion and the locking portion of the sliding body.

  According to the present invention, the handle is provided with a pivot shaft that fits into a fitting hole formed in the mounting board of the hanging portion, and the sliding body is slidably fitted to the pivot shaft. It is a sash characterized by being provided with a hole.

  According to the present invention, a crescent lock having a hanging portion that extends to the outer shoji while rotating by the rotation of the handle is provided on the summing child's summon cage, and the crescent that engages the above-mentioned hanging portion on the outer arm's summoning rod. A release mechanism that provides a support and provides a rotation prevention mechanism that prevents the handle from rotating more than a predetermined angle in the locking direction, and releases the rotation prevention mechanism when the inner and outer shoji are in the normal closed position. The rotation prevention mechanism includes a rotation side locking portion including a hook portion and a pedestal side locking portion, and the release mechanism includes the handle when the inner and outer obstacles are in a normally closed position. The sash is characterized in that it has a contact portion that contacts the crescent receiver by the rotation, and the contact portion releases the rotation prevention mechanism by a reaction force that contacts the crescent receiver.

  According to the sash according to the present invention, a crescent lock having a hanging portion that extends to the side of the handicapped child while rotating by the rotation of the handle is provided on the handbag of the inner hand, and the handbag of the handicapped child is provided with the above-mentioned hook. A crescent receiver that engages with the hook, and a rotation blocking mechanism that prevents rotation of the handle from the unlocked position to the locking direction by a predetermined angle or more is provided on the rotation side including the hanging portion. And a release mechanism that allows the handle to be rotated to the locked position by releasing the rotation prevention mechanism by a reaction force that contacts the crescent receiver when the handle is in a normally closed position. Since a spring that selectively biases the handle toward the unlocked position or the locked position is provided, whether the inner and outer shoji are in the normally closed position using the rotation of the handle of the crescent lock Mechanical sensing Conventionally, the handle can be rotated to the locked position only when it is in the normal closed position, and the projecting portion that is the sensing portion always protrudes and contacts the vertical arm of the shoji every time the shoji is opened and closed Unlike a sash equipped with a crescent lock, it is less susceptible to wear damage and can improve durability.

  According to the sash according to the present invention, a crescent lock having a hanging portion that extends while rotating by the rotation of the handle is provided on the summing child's summoning hook, and the hanging portion is engaged with the summoning handbag of the outer shoji. A swingable swinging body is provided on the rotating side including the hanging portion, and one end of the swinging body is locked to a locking portion provided on the fixed side so that the handle has a predetermined angle or more. And the other end of the oscillating body abuts against the crescent receiver by the rotation of the handle when the inner and outer shojis are in a normally closed position. Since the locking state of the locking portion is released, the handle can be rotated to the locked position, and a spring that selectively biases the handle toward the unlocked position or the locked position is provided. Rotation is used to normalize inner and outer shoji Whether it is in the chain position or not can be mechanically sensed, and the handle can be rotated to the locked position only when it is in the normal closed position. Unlike conventional sashes that have a crescent lock that comes in contact with the vertical arm of the shoji each time the door is opened and closed, it is less susceptible to wear damage and can improve durability.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  In FIG. 1, reference numeral 1 denotes a sliding sash having a frame body 2 assembled in a square shape that is attached to an opening of a building housing. Inside the frame body 2, an inner shoji 3 and an outer shoji 4 are attached so as to be slidable. The inner and outer children 3 and 4 have the glass 7 fitted inside the casings 5 and 6 that are assembled in a square shape by the upper rods 5a and 6a, the lower rods 5b and 6b, and the vertical rods 5c, 5d, 6c, and 6d on both sides. Configured.

  As shown in FIGS. 2 to 3, the summoning cage 5 c of the inner sward 3 has a hanging portion 9 that extends toward the outer sward 4 while being rotated by the turning operation of the handle 8. And a crescent receiver 11 to which the hook 9 is engaged is attached to the summoning cage 6c of the external shoji 4. The hook portion 9 has a mounting board 12 made of a rigid plate, preferably a metal plate, and is formed by bending a part of the mounting board 12 into a substantially arc shape. The crescent receiver 11 is made of a rigid plate material, preferably a metal plate, and its tip is bent into a U shape on the side of the inner shroud 3 and is processed into a circular arc shape so that the hook portion 9 can be easily engaged. The receiving part 13 is provided.

  The crescent lock 10 is provided with a rotation blocking mechanism 14 for blocking the rotation of the handle 8 in a locking direction by a predetermined angle or more, and when the inner and outer obstacles 3 and 4 are in a normally closed position. A release mechanism 15 that releases the rotation prevention mechanism 14 by a reaction force that abuts the crescent receiver 11 by the rotation of the handle 8 is provided. More specifically, these structures have a box-like pedestal 16 for attaching the crescent lock 10 to the end face of the summoning cage 5c of the inner sward 3 and the pedestal 16 has the handle 8 described above. A hole 18 is provided for rotatably supporting the rotation shaft 17 provided in the.

  The rotating shaft 17 protrudes at a right angle from the base of the handle 8, and a key 19 protrudes from the rotating shaft 17. A fitting hole 21 with a key groove 20 into which the rotating shaft 17 including the key 19 of the handle 8 is fitted is provided in the mounting substrate 12 of the hanging portion 9, and the hanging portion 9 including the mounting substrate 12 serves as the handle. 8 is rotated together with the unit 8. Further, the pedestal 16 accommodates a key 19 of the pivot shaft 17, and the handle 8 can be pivoted through the key 19 within a certain range, as shown in FIG. A rotation restricting groove 22 is provided for restricting to a range of approximately 180 degrees.

  A swingable swinging body 23 is provided on the rotating side including the hanging portion 9 of the crescent lock 10, and one end of the swinging body 23 is locked to a locking part 24 provided on the fixed side. The handle 8 is prevented from turning more than a predetermined angle, and the other end of the oscillating body 23 is moved by the turning of the handle 8 when the inner and outer obstacles 3 and 4 are in the normal closed position. Specifically, the engagement between the one end of the rocking body 23 and the locking portion 24 is released by the reaction force that abuts on the receiving portion 13.

  That is, the mounting board 12 and the handle 8 of the hanging part 9 on the rotating side are provided with holes 26 and 27 into which the support shaft 25 of the swinging body 23 is fitted. The rocking body 23 made of a rigid plate material, preferably a metal plate, is attached via a support shaft 25 so as to be rockable. A claw portion 28 that protrudes toward the base 16 is formed at one end of the rocking body 23, and a contact surface portion 29 as a sensing portion that contacts the receiving portion 13 of the crescent receiver 11 at the other end of the rocking body 23. Is formed.

  On the support shaft 25 of the rocking body 23, the claw portion 28 is locked to a part of the mounting substrate 12, and the return spring 30 is urged so as to hold the contact surface portion 29 on the start end side of the hook portion 9. Is attached. Further, the pedestal 16 on the fixed side has a handle 8 with a predetermined angle in the locking direction from the downward release position (a rotation angle necessary for the contact surface portion 29 to contact the receiving portion 13 of the crescent receiver 11, for example, When it rotates, a locking portion 24 is provided that locks the claw portion 28 of the rocking body 23 and prevents further rotation of the handle 8 (see FIG. 4). That is, the rotation preventing mechanism 14 is configured by the claw portion 28 and the locking portion 24 of the rocking body 23.

  On the other hand, when the handle 8 is rotated in the locking direction from the unlocking position (a) when the inner and outer shojis (3, 4) are in the normal closed position, the abutting surface portion (29) is brought into contact with the receiving portion (13) of the crescent receiver (11). Further, the hook 25 is tilted to the inner rear side of the hook 9 against the urging force of the return spring 30 against the urging force of the return spring 30, and the claw 28 is separated from the mounting substrate 12 and the locking portion 24 by the reaction force or reaction. Then, the rotation prevention state is released. That is, the abutment surface portion 29 of the rocking body 23 constitutes a release mechanism 15 that releases the rotation prevention mechanism 14. By releasing the rotation prevention state, the handle 8 can be rotated to the upward locking position B (see FIG. 5). The pedestal 16 is provided with a guide portion 31 for guiding the claw portion 28 separated from the locking portion 24 so as to maintain the contact surface portion 29 in a collapsed state.

  Inside the pedestal 16, an end plate 32 for retaining is attached to the end of the rotating shaft 17 of the handle 8 with a screw 33, and the handle 8 is attached to the end plate 32 as the handle 8 rotates. A spring 34 is attached to selectively urge the lever in the unlocking position B direction or the locking position B direction. A lock member 37 having an engagement piece 36 detachably engaged with an engagement groove 35 formed in the end plate 32 is slidably provided in the pedestal 16 at the locking position b. The crescent lock 10 can be locked in the locked position by operating a knob 38 protruding from the lock member 37.

  Next, the operation of the sash configured as described above will be described. Usually, the crescent lock 10 is locked after closing the inner limb 3 and the outer limb 4, but the inner limb 3 and the outer limb 4 are not sufficiently closed, or the inner limb 3 and the outer limb 4 are opened. In some cases, the locking operation may be mistakenly performed. In such a case, when the handle 8 of the crescent lock 10 is rotated in the locking direction from the unlocking position a as shown in FIGS. 4 (a) and 4 (b), the contact surface portion 29 of the rocking body 23 receives the crescent receiving portion. 11, the claw portion 28 of the rocking body 23 is locked to the locking portion 24 on the base 16 side, and the rotation of the handle 8 is prevented. Therefore, since the handle 8 cannot be rotated further in the locking direction, erroneous locking is prevented in advance.

  Further, when the handle 8 is released, the handle 8 is automatically returned to the release position A by the spring 34, so that the hanging portion 9 of the crescent lock 10 does not remain extended in the locking direction. Therefore, even if the inner and outer shojis 3 and 4 are subsequently opened and closed, the hanging portion 9 and the vertical rod 6d of the outer shoji 4 do not collide and are not deformed or damaged, and the durability can be improved. .

  On the other hand, when the inner and outer children 3 and 4 are in the normally closed position, as shown in FIGS. 5A and 5B, the handle 8 of the crescent lock 10 is rotated from the unlocked position A to the locking direction. As the handle 8 is turned, the abutment portion 9 and the abutment surface portion 29 of the oscillating body 23 approach the crescent receiver 11 as the handle 8 rotates, and the abutment surface portion 29 is further moved to the crescent as shown in FIG. Abutting against the receiving portion 13 of the receiving 11 against the urging force of the return spring 30, the support shaft 25 is tilted to the fulcrum, and the claw portion 28 of the oscillating body 23 is engaged with the locking portion 24 on the base 16 side by the reaction force or reaction. Get away from.

  Accordingly, the claw portion 28 of the rocking body 23 is not locked to the locking portion 24, that is, the rotation preventing mechanism 14 is released, so that the handle 8 is left as it is as shown in FIG. It is possible to rotate to the locking position B, and the hooking portion 9 can be sufficiently engaged with the receiving portion 13 of the crescent receiver 11 to be surely locked. Further, the claw portion 28 separated from the locking portion 24 is guided along the guide portion 31 as it is, so that the state in which the contact surface portion 29 of the rocking body 23 is tilted is maintained.

  When the crescent lock 10 is unlocked, the handle 8 may be rotated from the locking position B to the unlocking direction, and the hooking portion 9 and the contact surface portion 29 of the rocking body 23 are moved in the reverse order to the above. The contact surface portion 29 of the rocking body 23 is not caught by the receiving portion 13 of the crescent receiver 11, and can be unlocked reliably and easily.

  In this way, it is possible to detect whether or not the inner shoji 3 and the outer shoji 4 are in the normal closed position by using the rotation of the handle 8 of the crescent lock 10, and the handle 8 is moved only when it is in the normal closed position. Unlike the sash equipped with a conventional crescent lock that protrudes constantly as the sensing part and contacts the vertical arm of the shoji every time the shoji is opened and closed, because it can rotate sufficiently in the locking direction, It is less susceptible to wear damage and can improve durability. That is, in the present embodiment, the abutting surface portion 29 of the oscillating body 23 that functions as the sensing portion is disposed on the start end side of the hanging portion 9 that is the rotation side of the crescent lock 10 and is only at the time of locking. Moreover, since it is a structure extended to the external shoji 4 side, it is hard to receive abrasion damage and can improve durability. Moreover, the present invention can be easily applied to an existing sash by simply replacing the crescent lock 10 with an existing crescent lock.

  7 to 9 show other examples of the crescent lock. The same parts as those of the above-described crescent lock are given the same reference numerals, and the description thereof is omitted. As shown in the figure, the crescent lock 10 is provided with a sliding body 40 that is slidable in the radial direction on the rotating side including the hook portion 9, and a claw portion 28 provided on the sliding body 40 is provided on the fixed side. The sliding body 40 is locked by the locking portion 24 to prevent the handle 8 from rotating more than a predetermined angle, and when the inner shroud 3 and the outer shroud 4 are in the normal closed position, the handle 8 is rotated to rotate the sliding body 40. Is configured to release the locking state of the claw portion 28 and the locking portion 24 of the sliding body 40 by the reaction force that contacts the crescent receiver 11, specifically, the receiving portion 13 of the crescent receiver 11.

  The sliding body 40 replaces the rocking body 23 of the crescent lock 10 described above, and is formed of a rigid plate material, preferably a metal plate. The sliding body 40 is provided with a long hole 41 which is fitted to the rotating shaft 17 including the key 19 of the handle 8 so as to be slidable in one radial direction. Further, a mountain-shaped cam surface portion (corresponding to a contact surface portion) 42 positioned on the start end side of the hook portion 9 is formed at one end of the sliding body 40 in the sliding direction, and the claw is formed at the other end of the sliding body 40. A portion 28 is formed. A return spring 43 is attached to the handle 8 to urge the other end of the sliding body 40 in a direction in which the cam surface portion 42 abuts against the start end of the hook portion 9.

  In the above-described crescent lock 10, the handle 8 is rotated from the unlocked position A to the locking direction as shown in FIGS. 8A and 8B when the inner and outer children 3 and 4 are not in the normally closed position. When operated, the cam surface portion 42 of the sliding body 40 does not come into contact with the receiving portion 13 of the crescent receiver 11, so that the claw portion 28 of the sliding body 40 is locked to the locking portion 24 on the pedestal side, and the handle 8 is rotated. Be blocked. Therefore, since the handle 8 cannot be rotated further in the locking direction, it is possible to prevent the locking operation from being performed by mistake.

  On the other hand, when the inner shroud 3 and the outer shoji 4 are in the normal closed position, the handle 8 of the crescent lock 10 is rotated from the unlocked position A to the locking direction as shown in FIGS. 9 (a) and 9 (b). When the operation is performed, the hook portion 9 and the cam surface portion 42 of the sliding body 40 approach the crescent receiver 11 as the handle 8 rotates, and further, the cam surface portion 42 is moved to the crescent receiver 11 as shown in FIG. The claw portion 28 of the sliding body 40 is separated from the locking portion 24 on the pedestal 16 side by the reaction force or reaction.

  Thereby, since the claw portion 28 of the sliding body 40 is not locked to the locking portion 24, the handle 8 can be rotated as it is to the locking position b as shown in FIG. 9 can be sufficiently engaged with the crescent receiver 11 and securely locked. Therefore, also in the sash of this example, the same effect as the sash described above can be obtained.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above-described embodiments, and various design changes and the like can be made without departing from the gist of the present invention. is there. For example, as a mounting structure of the swing body, a hole formed in the swing body may be fitted to a support shaft protruding from the handle, or the swing body may be supported on the mounting substrate of the hanging portion. May be. As a mounting structure of the sliding body, a shaft may be provided so as to project from the mounting substrate of the hanging portion, and the sliding body may be slidably mounted via this shaft.

  In the above embodiment, the contact surface portion 29 of the rocking body 23 or the cam surface portion 42 of the sliding body 40 is configured to detect the normal closed position by contacting the crescent receiver 11. A rotation prevention mechanism and a release mechanism are provided in the summoning cage 5c of the shoji 7 so as to be interlocked with the crescent lock, and are brought into a normally closed position by contacting the summing rod 6c of the shoji 4 instead of the crescent receptacle 11. It may be configured to sense something. Moreover, in the said embodiment, although the sash which has 2 inside and outside shoji was illustrated, this invention is applicable also to the sash which has 3 or more sheets of shoji.

It is the front view which looked at the sash to which this invention is applied from the indoor side. It is an AA line expanded sectional view of FIG. FIG. 3 is an exploded perspective view of the crescent lock shown in FIG. 2. It is explanatory drawing explaining the action | operation of a crescent lock. It is explanatory drawing explaining the action | operation of a crescent lock. It is a rear view of the base part of a crescent lock. It is a disassembled perspective view which shows the other example of a crescent lock. It is explanatory drawing explaining the action | operation of the crescent lock of FIG. It is explanatory drawing explaining the action | operation of a crescent lock.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sash 3 Inner-skid 4 Injury child 5c Inner-children's summon 6c Outer-children's summoner 8 Handle 9 Hanging part 10 Crescent lock 11 Crescent receiver 14 Rotation prevention mechanism 15 Release mechanism 23 Oscillator 24 Locking part 34 Spring

Claims (6)

  Provide a crescent lock with a hook that extends to the side of the rehabilitator while rotating by turning the handle, and a crescent receptacle with which the hook is engaged. And a rotation prevention mechanism for preventing the handle from rotating more than a predetermined angle in the locking direction, and when the inner and outer obstacles are in a normally closed position, A sash comprising a release mechanism for releasing the rotation prevention mechanism by a reaction force that abuts against a shoji summon.   A crescent lock having a hanging portion that extends while rotating by the rotation of the handle is provided on the summon child's summon cage, and a crescent receptacle is provided on the summit child's summit rod that engages the above-mentioned latch portion. A swingable swinging body is provided on the rotation side including the stopper, and one end of the swinging body is locked to a locking portion provided on the fixed side to prevent the handle from rotating more than a predetermined angle. When the inner and outer shojis are in the normal closed position, the other end of the rocking body is locked to one end of the rocking body by the reaction force with which the other end of the rocking body abuts the crescent receiver or the summing rod of the outer shoji when the handle rotates. A sash configured to release the locked state of the portion.   3. The swinging body is pivotally supported by a swinging side including the hooking portion, and the other end of the swinging body is biased in a protruding direction by a return spring. Sash.   A crescent lock having a hanging portion that extends while rotating by the rotation of the handle is provided on the summon child's summon cage, and a crescent receptacle is provided on the summit child's summit rod that engages the above-mentioned latch portion. A sliding body that is slidable in the radial direction is provided on the rotating side including the hook, and a claw portion provided on the sliding body is locked to a locking portion provided on the fixed side to rotate the handle more than a predetermined angle. The sliding body is prevented from moving by the reaction force that the sliding body comes into contact with the crescent receiver or the summing rod of the outer shingles by turning the handle when the inner shingles and the outer shingles are in the normal closed position. A sash configured to release a locking state between a claw portion and a locking portion.   The handle is provided with a rotating shaft that fits into a fitting hole formed in the mounting substrate of the hanging portion, and the sliding body is provided with an elongated hole that is slidably fitted to the rotating shaft. The sash of Claim 4 characterized by the above-mentioned.   A crescent lock having a hanging portion that extends to the outer shoji while rotating by the rotation of the handle is provided on the heel of the inner shoji, and a crescent receptacle that engages the hanging portion on the heel of the outer shoji, A rotation prevention mechanism that prevents the handle from rotating more than a predetermined angle in the locking direction is provided, and a release mechanism is provided to release the rotation prevention mechanism when the inner and outer obstacles are in the normal closed position. The movement prevention mechanism includes a rotation-side locking portion including a hanging portion and a pedestal-side locking portion, and the release mechanism is configured by the rotation of the handle when the inner and outer obstacles are in a normally closed position. A sash having a contact portion that contacts the crescent receiver, and the contact portion releases the rotation blocking mechanism by a reaction force that contacts the crescent receiver.

Images