JP2008202264A - Stay for window ventilation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation stay suitable for a window of a mid-to-high-rise house which receives a strong wind daily, and locking and holding the window opened for ventilation to surely prevent the window from returning into a closed attitude under wind pressure. <P>SOLUTION: The window 2 is provided with a change-over base 4, and an opening frame is provided with a latch body 5. The change-over base 4 is provided with a change-over implement 6 for changing a restraining arm 8 over to a ventilating position and a fully open position. One end of the restraining arm 8 is connected in a swingable manner to the change-over implement 6 through a connecting pin 7, and the other end of the restraining arm 8 is provided with an engaging body 20 engaged with the latch body 5. A lock mechanism is provided between the change-over base 4 and the restraining arm 8. The lock mechanism includes a locking body 41 supported to be displaceable into a locking position and a lock release position by the change-over base 4, and a locked body 18 fixed to the restraining arm 8. In a state of the window 2 being opened into the ventilating position, the locked body 18 is locked and engaged with the locking body 41 to regulate the closing direction displacement of the restraining arm 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is provided between the window that is swingably opened and closed and the opening frame, and the window that is opened to the ventilation position can be restricted by the check arm, and when necessary, the opening restriction action by the check arm is canceled and the window is opened. The present invention relates to a stay for window ventilation that can be directly opened from a closed position to a fully opened position.

  This type of stay is known from US Pat. There, the check arm can be slid and switched between an upper ventilation position and a lower fully open position. In the state where the check arm is switched to the ventilation position, the check arm can be used to open the window beyond the ventilation position. Can be regulated. A plastic lock piece is attached to the swinging end of the check arm. By engaging and holding the engagement pin fixed to the window with the lock piece in the ventilation state, the window opened to the ventilation position receives wind pressure. Thus, it is possible to prevent returning to the closed state.

  A similar ventilation stay is also disclosed in Patent Document 2. In this case, when the window is returned from the fully open position to the closed position, the check arm can be automatically reset to a state in which ventilation can be opened, which is different from the previous ventilation stay.

Japanese Unexamined Patent Publication No. 2000-38866 (paragraph numbers 0013 and 0016, FIG. 3) Japanese Patent No. 3401678 (paragraph number 0012, FIG. 5)

  The ventilation stay of patent document 1 can prevent that the window open | released to the ventilation position receives a wind pressure and returns to a closed state by engaging and holding the locking pin fixed to the window with a lock piece. However, since the lock pin is engaged and held by an elastically deformable engagement claw, if the wind pressure exceeds the elastic engagement force between the engagement claw and the engagement pin, the window is pushed back to the closed position. End up. For this reason, ventilation stays cannot be applied to windows in medium- and high-rise houses that receive daily strong winds. Furthermore, it is necessary to prepare lock pieces having different elastic engagement forces corresponding to the size of the window, and it is inevitable that the management of the ventilation stay becomes complicated.

  An object of the present invention is to provide a ventilation stay that can reliably prevent a window from returning to a closed position due to wind pressure by locking and holding a check arm in a state where the window is opened to a ventilation position. An object of the present invention is to provide a ventilation stay that can automatically prevent a window from returning to a closed position by receiving wind pressure by automatically holding and holding a check arm simultaneously with opening a window to a ventilation position. It is in. The object of the present invention is that the check arm can be automatically locked and held by the lock body in the ventilation position, and the closing operation of the window can be simplified by holding the lock body in the unlocked state, and the window is completely closed. Therefore, it is to provide a ventilation stay that can reset the lock body to the locked state again and has excellent usability and crime prevention effect. An object of the present invention is to provide a ventilation stay suitable for a window of a medium- and high-rise house that receives a strong wind on a daily basis.

  The stay for window ventilation of the present invention is provided with a switching base 4 on one of the opening frame 1 and the window 2 and a latching body 5 that engages with a check arm 8 on the other. The switching base 4 is provided with a switching tool 6 for switching the check arm 8 between a ventilation position and a fully open position so as to be reciprocally displaceable. One end of the check arm 8 is slidably connected to the switching tool 6 via a connecting pin 7, and an engagement body 20 that engages with the hook body 5 is provided at the other end of the check arm 8. In a state where the check arm 8 is switched to the ventilation position by the switching tool 6, the engagement body 20 of the check arm 8 and the hooking body 5 are connected, and the window 2 can be restricted from being opened at the ventilation position. A lock structure is provided between the switching base 4 and the check arm 8 to restrict the check arm 8 from returning from the ventilation position to the closed position. The lock structure includes a lock body 41 supported by the switching base 4 so as to be displaceable between a lock position and an unlock position, and a locked body 18 fixed to the check arm 8. Therefore, in the state where the window 2 is opened to the ventilation position, the locked body 18 is locked and engaged with the lock body 41 so that the displacement in the closing direction of the check arm 8 can be regulated.

  The lock structure includes a lock body 41, a lock pin 18 that is fixed near one end of the check arm 8, and a lock spring 42 that moves and urges the lock body 41 toward the lock position. The switching base 4 is formed with a switching groove 12 for moving and guiding the connecting pin 7 and the lock pin 18 and a lock groove 13 for swinging and guiding the lock pin 18. The lock body 41 includes a lock plate 45 that prevents the return movement of the lock pin 18 and an unlocking tool 46 that unlocks the lock body 41. The lock plate 45 is provided with a lock piece 47 that crosses the lock groove 13 at the lock position. A stopper portion 47b that prevents the return movement of the lock pin 18 is formed on one peripheral edge of the lock piece 47, and an introduction guide portion 47a that is displaced in the unlocking direction by the lock pin 18 is formed on the other peripheral edge of the lock piece 47. To do. Accordingly, the lock pin 18 that is displaced to the ventilation position can be automatically locked and held by the lock body 41.

  The lock body 41 is pivotally supported by a swing shaft 49 so as to be reciprocally swingable between a lock position and a lock release position.

  As shown in FIG. 12, the lock body 41 is guided and supported by the switching base 4 so as to be slidable back and forth between the lock position and the lock release position.

  A holding pin 51 is provided on the lock body 41, and a catch body 43 that engages and holds the holding pin 51 switched to the unlocking position is provided on the switching base 4.

  A reset piece 48 is provided on the lock body 41. The reset piece 48 that crosses the lock groove 13 at the unlocking position is switched by the lock pin 18 that moves back from the lock groove 13 to the switching groove 12 so that the lock body 41 can be automatically returned to the lock position.

  The switching tool 6 is supported by the switching base 4 so as to be slidable back and forth between the ventilation position and the fully open position. A kick spring 31 is disposed between the switching tool 6 and the switching base 4 to hold the switching tool 6 at each switching position between the ventilation position and the fully open position.

  In the present invention, in the stay for window ventilation constituted by the switching base 4, the retaining body 5, the switching tool 6, the checking arm 8, etc., the checking arm 8 is ventilated between the switching base 4 and the checking arm 8. A locking structure that locks in position was provided. The lock structure includes a lock body 41 that is supported by the switching base 4 so as to be displaceable between a lock position and an unlock position, a locked body 18 that is fixed to the check arm 8, and the like, and opens the window 2 to the ventilation position. In this state, the locked body 18 is locked and engaged with the lock body 41 so that the displacement in the closing direction of the check arm 8 can be regulated. Therefore, according to the stay for window ventilation of the present invention, it is possible to reliably prevent the window 2 that has been ventilated open from being returned to the closed position due to the wind pressure, and even in a window of a medium to high-rise house that receives a strong wind on a daily basis. It can be reliably held open in the ventilation position.

  According to the lock structure in which the lock body 41, the lock pin 18, the lock spring 42, etc. constitute a lock structure, and the lock body 45 is constituted by the lock plate 45 that prevents the return movement of the lock pin 18 and the lock release tool 46. In the normal state, the lock plate 45 can be held at the lock position. In this state, the lock piece 47 provided on the lock plate 45 crosses the lock groove 13. A stopper 47b that prevents the return movement of the lock pin 18 is formed on one periphery of the lock piece 47, and an introduction guide that is displaced in the unlocking direction by the lock pin 18 on the other periphery of the lock piece 47. A portion 47a is formed. Therefore, when the window 2 is opened from the closed position to the ventilation position, the lock pin 18 that swings together with the check arm 8 comes into contact with the introduction guide portion 47a of the lock piece 47, and the urging force of the lock spring 42 is applied to the lock plate 45. Displace in the unlocking direction while resisting As a result, the lock pin 18 is displaced along the lock groove 13 so as to pass through the lock piece 47, and in the state of switching to the ventilation position, the lock pin 18 is locked and held by the lock plate 47 returned to the lock position. Thereafter, the lock pin 18 is received by the stopper portion 47b of the lock piece 47, and the window 2 can be reliably prevented from being displaced toward the closed position.

  As described above, the lock body 41 is always locked and held toward the lock position, and the lock body 41 is displaced in the unlocking direction by the movement of the lock pin 18 when the check arm 8 is displaced to the ventilation position. When the lock pin 18 can be automatically locked and held by the lock plate 45 at the ventilation opening position, after the check arm 8 is switched to the ventilation posture by the switching tool 6, the window 2 is simply opened to the ventilation position. Since the lock pin 18 can be automatically locked and held by the lock plate 45, the window 2 can be automatically held in the ventilation position regardless of whether or not the user is familiar with the lock function. Furthermore, since it is not necessary to switch the lock body 41 to the locked position while the window 2 is ventilated, it is possible to save the trouble of opening the window and to improve the usability of the stay for window ventilation. In the ventilation position, the lock pin 18 is engaged with the lock groove 13, and the check arm 8 cannot be switched from the ventilation position to the fully open position unless the window 2 is closed. Therefore, it is possible to reliably prevent the switching tool 6 from being operated to the fully open position from the outside of the building and improve the crime prevention.

  According to the lock structure in which the lock body 41 is pivotally supported by the swing shaft 49 so as to be reciprocally swingable between the lock position and the unlock position, the lock pin (locked body) 18 is caused by the swing moment when the lock pin (locked body) 18 moves. Since the lock body 41 can be operated in the unlocking direction, the lock piece 47 can be smoothly passed through by the lock pin 18, and the lock holding operation of the lock pin 18 by the lock body 41 can be performed lightly and reliably. By optimizing the positional relationship between the direction of the force of the lock pin 18 acting on the lock piece 47 in the locked state and the center position of the swing shaft 49, the lock pin 18 tries to move in a direction away from the lock position. Since the lock body 41 can be operated in the direction to hold the lock body 41 by using the force to be locked, even when a large wind pressure is applied to the window 2, the lock body 18 can be securely held by the lock body 41 and the strength can be increased. It is advantageous.

  According to the lock structure in which the lock body 41 is guided and supported by the switching base 4 so as to be slidable back and forth between the lock position and the lock release position, the lock pin 18 can be automatically locked and held by the lock plate 45 and is also supported in a swinging manner. Compared with the lock plate 45, the structure of the lock plate 45 can be simplified, and the switching operation of the lock body 41 can be simplified.

  According to the lock structure in which the holding pin 51 is provided on the lock body 41 and the holding pin 51 switched to the unlocking position is engaged and held by the catch body 43 provided on the switching base 4, the lock body 41 that has been unlocked is caught. Since it is captured by the body 43 and can be held and fixed in the unlocked position, it is necessary to close the window 2 while holding the unlocking tool 46 in the unlocked position with one hand, that is, in an unnatural posture. The window 2 can be easily and easily closed.

  According to the lock structure in which the reset piece 48 is provided in the lock body 41 and the reset piece 48 crosses the lock groove 13 in the unlocked position, the lock pin 18 is moved back from the lock groove 13 to the switching groove 12. In addition, since the reset body 48 can be switched with the lock pin 18 and the lock body 41 can be automatically reset to the lock position, the trouble of switching the lock body 41 to the lock position after closing the window 2 is omitted. Usability of the stay for ventilation can be further improved.

  The switching tool 6 is guided and supported by the switching base 4 so as to be slidable back and forth between the ventilation position and the fully open position, and the window ventilation stay in which the kick spring 31 is disposed between the switching tool 6 and the switching base 4 is switched. Since the tool 6 can be held by the kick spring 31 at each switching position between the ventilation position and the fully open position, the structure for holding the switching tool 6 at the ventilation position and the fully open position can be simplified.

(Example) FIG. 1 thru | or FIG. 11 shows the Example of the stay for window ventilation based on this invention. 2 and 3, reference numeral 1 denotes an opening frame, and 2 denotes a window. The window 2 is supported by a pair of upper and lower hinges 3 fixed to the opening frame 1 so as to be swingable and openable. When the window 2 is closed, it can be fixed and held with a lock (not shown) so that it cannot be opened. In order to hold the window 2 in the ventilation position, the stay of the present invention is provided between the swinging tip of the window 2 and the opening frame 1.

  In FIG. 3, the window ventilation stay includes a switching base 4 fastened and fixed to the opening frame 1 by screws, and a retaining frame (hanging body) 5 fastened and fixed to the side end surface of the vertical frame of the window 2 by screws. , A switching tool 6 guided and supported by the switching base 4 so as to be slidable up and down, a check arm 8 having one end connected to the switch 6 via a connecting pin 7, and between the switching base 4 and the check arm 8. It is comprised with the lock structure etc. which are provided in.

  In FIG. 4, the switching base 4 is formed of a vertically long rectangular press fitting that opens toward the opening frame 1, and a fastening seat 11 is formed at each of the upper and lower ends. A switching tool 6, a lock body 41 to be described later, and the like are incorporated in the switching base 4. A check arm 8, an operation lever 24 of the switching tool 6, and a release lever 46 of the lock body 41 are provided on the outer surface of the switching base 4. Etc. are assembled. A switching groove 12 and a lock groove 13 that are continuous in an inverted shape are formed in the upper and lower middle portions of the outer surface wall of the switching base 4, and a partial arc-shaped holding groove 14 is formed in the upper portion of the outer surface wall. An operation window 15 for the previous operation lever 24 is opened in a face wall adjacent to the indoor side below the switching groove 12.

  The check arm 8 is made of a band plate-like press-molded product made of a stainless steel plate and rounded at both upper and lower ends, and the middle part thereof is bent in a stepped shape (see FIG. 5). A lock pin (locked body) 18 is fixed near the upper end of the surface of the check arm 8 facing the switching base 4, and the connecting pin 7 is fastened adjacent to the lower side thereof. Furthermore, an engagement pin (engagement body) 20 is fixed near the lower end of the surface of the check arm 8 facing the retaining frame 5. A flange portion 20 a having a larger diameter than the shaft portion projects from the protruding end of the engagement pin 20.

  The switching tool 6 includes a slider 23 that is guided and supported by the switching base 4 so as to be slidable up and down, and an operation lever 24 that is detachably fixed to the slider 23. The slider 23 is made of a rectangular block-shaped plastic molded product, and has a pin hole for assembling the connecting pin 7 on the face wall, a relief recess 26 for a kick spring 31 to be described later, and the like. The operation lever 24 includes a lever main body 24a formed by bending a stainless steel plate in a step shape, and a knob 24b that is screw-fixed to an end portion on the indoor side of the lever main body 24a.

  In order to attach / detach the operation lever 24 to / from the slider 23, a pair of upper and lower lever pins 27 are fixed to the slider 23, and a pair of latching grooves 28 are formed on the end plate surface on the indoor side of the operation lever 24. After engaging these latching grooves 28 with the lever pin 27 as shown in FIG. 9, the operation lever 24 can be integrated with the slider 23 by fastening the end plate surface with screws 29. When necessary, loosening the screw 29 and removing the operation lever 24 from the slider 23 as shown in FIG. 1 can prevent the switching tool 6 from being switched up and down by a person other than the manager.

  With one end of a kick spring 31 made of a torsion coil spring hooked on the slider 23 and the other end pivotally supported on the inner surface of the switching base 4, the slider 23 is applied to the inner surface of the switching base 4, and the slider 23 as described above. By fixing the operation lever 24, the switching tool 6 and the switching base 4 can be integrated. Further, by engaging the lock pin 18 with the switching groove 12 and connecting the slider 23 and the check arm 8 with the connecting pin 7, the check arm 8 and the slider 23 can be integrated with the switching base 4 in between. When the operation lever 24 is moved up and down along the operation window 15, the switching tool 6 and the check arm 8 are moved to the upper ventilation position (the state shown in FIG. 6) and the lower fully opened position (the state shown in FIGS. 5 and 7). Can be reciprocated. The kick spring 31 is provided to hold the switching base 4 at each switching position between the ventilation position and the fully open position.

  As shown in FIG. 5, the connecting pin 7 is caulked and fixed in a state in which the slider 23 and the check arm 8 are connected, so that the check arm 8 can be pivotally supported relative to the slider 23. In this assembled state, the shaft portion of the connecting pin 7 a is guided to shift by the switching groove 12 of the switching base 4. The window 2 swings around the hinge 3 with respect to the opening frame 1. Therefore, when the window 2 is opened to the ventilation position, the side end surface of the window vertical frame becomes non-parallel to the mounting surface of the switching base 4 as shown in FIG. In order to smooth the posture change of the check arm 8 accompanying opening and closing of the window 2, the connecting pin 7 a can be moved in the axial direction with respect to the slider 23, and the connecting pin 7 a is moved with respect to the switching groove 12. A compression spring 32 is disposed between the connecting pin 7a and the slider 23 so as to be tiltable, and draws and urges the screw and the check arm 8 toward the slider 23 (see FIG. 5).

  The retaining frame 5 is made of a rectangular metal fitting that is long in the vertical direction and opens toward the window vertical frame. A longitudinal guide groove 34 that engages with the engagement pin 20 of the check arm 8 is formed on the outer surface wall of the retaining frame 5, and an engagement port 35 is opened at the lower end of the guide groove 34. In a state where the window 2 is closed and the switching tool 6 is switched to the fully open position, the engagement pin 20 is located below the engagement port 35 as shown by an imaginary line in FIG. Direct open operation is possible. When the switching tool 6 is slid upward from the fully open position to switch to the ventilation position with the window 2 closed, the engagement pin 20 is connected to the guide groove 34 via the engagement port 35 as shown by the solid line in FIG. The window 2 can be opened to the ventilation position where the engaging pin 20 contacts the upper end of the guide groove 34, and thereafter the window opening to the fully opened position side can be restricted.

  An elastic lock piece 36 made of plastic is provided on the inner surface of the groove end of the guide groove 34 in order to restrict the engagement pin 20 from sliding back to the closing side in the ventilation position. The elastic lock piece 36 includes a pair of elastic arms 37 for engaging and capturing the flange portion 20 a of the engagement pin 20, and a pair of fitting claws 38 provided on the left and right of the base end of the elastic arm 37. The elastic locking piece 36 can be integrated with the retaining frame 5 by press-fitting both fitting claws 38 into the notch grooves 39 formed on the upper left and right sides of the retaining frame 5.

  In order to prevent the window 2 in a ventilated open state from being pushed back to the closed position under wind pressure, a lock structure is provided between the switching base 4 and the check arm 8 separately from the elastic lock piece 36 described above. The lock structure in this embodiment includes an automatic lock function that automatically locks and holds the lock pin 18 of the check arm 8 that is displaced to the ventilation position, and an automatic function that automatically returns the lock structure that has been switched to the unlocked state to the locked state. It has a reset function.

  As shown in FIGS. 1 and 4, the lock structure has a lock body 41 assembled to the switching base 4, a lock pin 18 fixed to the check arm 8, and a rocking bias of the lock body 41 toward the lock position. The lock spring 42 and the catch body 43 that engages and holds the lock body 41 that is switched to the unlocking position are configured. The lock body 41 includes a lock plate 45 that prevents the lock pin from returning and a release lever (lock release tool) 46 that unlocks the lock plate 45. The lock spring 42 is a torsion coil spring.

  The lock plate 45 is formed of a stainless steel plate metal fitting having a triangular lock piece 47 and a reset piece 48 formed on the lower edge side, and a plate surface near the reset piece 48 is supported by a swing shaft 49. On the plate surface of the lock plate 45, a holding pin 51 that is engaged and captured by the previous catch body 43 and a pin 52 for hooking one end of the lock spring 42 are fixed.

  With the holding pin 51 engaged with the holding groove 14, the lock plate 45 is applied to the inner surface of the switching base 4, and the connecting seat 46 a of the release lever 46 is engaged with the swing shaft 49 and the holding pin 51, and then swings. By fixing the shaft 49 and the holding pin 51 by caulking, the lock plate 45 and the release lever 46 are integrated. The lock body 41 in this state can swing back and forth between the lock position (the state shown in FIG. 1) and the lock release position (the state shown in FIG. 10), and is a lock spring that is hooked on the inner surface of the pin 52 and the switching base 4. 42 is oscillated and biased toward the lock position.

  The catch body 43 is provided to hold the position of the lock body 41 switched to the unlocking position. The base body 55 is fixed by caulking pins 54 to the inner corners of the switching base 4, and the base body 55 is inclined downward. It consists of a plastic molded product that is integrally provided with a pair of elastic arms 56 that are connected to each other. A narrow portion 57 for capturing the holding pin 51 is formed near the inner end of the elastic arm 56 (see FIG. 7).

  As shown in FIG. 7, the lock body 41 in the normal state is oscillated and biased by the lock spring 42 and is in the lock position, and the lock piece 47 closes the lock groove 13. When the switching tool 6 is switched from the fully open position to the ventilation position in this state, the connecting pin 7 and the lock pin 18 move upward along the switching groove 12, and the lock pin 18 is moved to the entrance of the lock groove 13 (see FIG. 6). Adjacent to the locking piece 47 at the groove end on the switching groove 12 side). At this time, the engaging pin 20 enters the guide groove 34 of the retaining frame 5.

  When the window 2 is opened in the above state, the check arm 8 tilts around the connecting pin 7 while following the window 2. When the engagement pin 20 reaches the upper end of the guide groove 34, the lock pin 18 is in a state of circumscribing the introduction guide portion 47 a of the lock piece 47 and resists the urging force of the lock spring 42. Push up in the clockwise direction. Immediately before the check arm 8 is switched to the ventilation position, the lock pin 18 moves over the top 47c of the lock piece 47 and moves to the deep end of the lock groove 13 (state shown in FIG. 1). At the same time, the lock body 41 returns to the lock position where the lock piece 47 again closes the lock groove 13 by the urging force of the lock spring 42, and the lock pin 18 moves back to the switching groove 12 side. Stopped by the stopper portion 47b. That is, the lock structure can automatically lock the lock pin 18 of the check arm 8 in the ventilation position.

  When the lock pin 18 circumscribes the introduction guide portion 47a of the lock piece 47 and when the lock pin 18 circumscribes the stopper portion 47b of the lock piece 47, the direction of the moment transmitted from the lock pin 18 to the lock piece 47 is different. Different. Specifically, when the lock pin 18 circumscribes the introduction guide portion 47a, the rocking moment M in the clockwise direction about the rocking shaft 49 is applied to the lock plate 47 as shown in FIG. Works. Therefore, the lock plate 47 is swung in the unlocking direction by the lock pin 18 as the check arm 8 is tilted.

  Further, in a state where the lock pin 18 circumscribes the stopper portion 47b, the return tilting force F shown in FIG. The direction of the force of the return tilting power F is directed to the center position of the swing shaft 49 or a position deviated from the center of the swing shaft 49 toward the reset piece 48. Therefore, the lock plate 47 does not swing and displace in the unlocking direction, and the lock pin 18 can be held in the ventilation position. That is, the window 2 can be fixedly held at the ventilation position against the wind pressure.

  When closing the window 2 that has been ventilated, as shown in FIG. 10, the release lever 46 is pivoted upward against the urging force of the lock spring 42 to switch to the unlock position. As a result, the holding pin 51 that swings along with the lock plate 45 passes through the narrow portion 57 while elastically deforming the elastic arm 56 and is held at the back end of the holding groove 14. Since the holding force of the holding pin 51 by the elastic arm 56 and the narrowed portion 57 is larger than the urging force of the lock spring 42, the lock body 41 does not return to the lock position. At this time, the lock piece 47 is retracted out of the lock groove 13, and the reset piece 48 blocks the entrance of the lock groove 13. Therefore, the window 2 can be closed without resistance.

  As described above, the lock body 41 is reset using the operation when the window 2 is closed from the ventilation position. As described above, in the state where the lock body 41 is switched to the lock position, the reset piece 48 blocks the entrance of the lock groove 13. Therefore, the lock pin 18 moves to the switching groove 12 while pushing the reset piece 48 against the holding force of the elastic arm 56. As a result, the lock body 41 is oscillated and displaced around the oscillating shaft 49, and at the same time, the holding pin 51 is pulled out from the elastic arm 56, so that the lock body 41 can be switched to the locked position again. In other words, the lock structure switched to the unlocked state can be automatically reset.

  FIG. 12 shows another embodiment of the lock structure. There, the lock body 41 is guided and supported by the switching base 4 so as to be reciprocally slidable so as to be switched between a lock position and a lock release position. For this purpose, a pair of upper and lower slide pins 61 are fixed to the plate surface of the lock plate 45 constituting the lock body 41, and a vertically long guide groove 62 is formed on the outer wall of the switching base 4. Further, a lock spring 42 made of a compression coil spring is disposed between the upper end wall on the inner surface of the switching base 4 and the lock plate 45 so that the lock body 41 can be urged by the lock spring 42. A triangular lock piece 47 is formed on the lower surface of the lock plate 45, an introduction guide portion 47 a inclined at one side edge of the lock piece 47 is provided, and a vertical stopper portion 47 b is provided at the other side edge of the lock piece 47. I did it. The reset piece 48 is omitted. An operation groove 63 for the release lever 46 is formed in the indoor side wall of the switching base 4.

  According to the lock structure described above, the lock pin 18 of the check arm 8 can be automatically locked by the lock body 41 in the ventilation position, similarly to the lock structure described in the previous embodiment. The lock body 41 can be switched between a lower lock position indicated by a solid line in FIG. 12 and an upper lock release position by operating the release lever 46 up and down. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted. The same applies to the following embodiments.

  FIG. 13 shows still another embodiment of the lock structure. There, the lock plate 45 is pivotally supported by a swing shaft 49 so as to be swingable up and down, and the release lever 46 is manually moved to a lock position (shown by a solid line) and a lock release position (shown by an imaginary line). The swing can be switched. In order to hold the release lever 46 at each switching position, the release lever 46 is provided with a joint protrusion 65, and an engagement hole 66 is formed on the inner surface of the switching base 4 so that the joint protrusion 65 falls and engages. In the lock structure of this embodiment, in a state where the release lever 46 is switched to the lock position, the stopper portion 47b of the lock piece 47 contacts the lock pin 18, and the lock pin 18 can be held in the ventilation position. Also in this case, the return tilting force acting on the lock plate 45 is directed downward from the line connecting the centers of the lock pin 18 and the swing shaft 49, so that the lock plate 45 is unlocked by the lock pin 18. There is nothing.

  In addition to the above embodiment, the switching base 4 can be provided on the window 2 and the retaining frame 5 can be provided on the opening frame 1. When the adjacent distance between the connecting pin 7 and the lock pin 18 is large, the switching groove 12 formed in the switching base 4 is formed independently of the switching groove for the connecting pin 7 and the switching groove for the lock pin 18. can do. The elastic lock piece 36 can be omitted. When the opening / closing stroke of the window 2 between the ventilation position and the closed position is small, the release lever 46 can be omitted.

  The to-be-locked body 18 can be comprised by the rod body, protrusion, etc. which can be reciprocated along the lock groove 13, and does not need to be a pin structure like the lock pin 18 demonstrated in the Example. Similarly, the engagement body 20 does not have to have a pin structure. By forming the lever portion of the lock release tool 46 from a press-molded product, the lever can be exposed to the indoor side using the seal portion between the window 2 and the opening frame 1 when the window 2 is closed. If it is not necessary, the lever structure can be freely formed.

It is a partially broken side view which shows the lock structure of a check arm. It is a schematic plan view which shows the related structure of a window and a check arm. It is a partially broken side view which shows the related structure of a window, an opening frame, and a check arm. It is a disassembled perspective view of the stay for window ventilation. It is a vertical front view which shows a switching tool and a lock structure. It is a partially broken side view of the state which switched the switching tool to the ventilation position. It is a partially broken side view of the state which switched the switching tool to the fully open position. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a partially broken side view of the lock structure switched to the unlocked state. It is explanatory drawing which shows the effect | action of the external force with respect to a lock plate. It is a partially broken side view which shows another Example of a lock structure. It is a partially broken side view which shows another Example of a lock structure.

Explanation of symbols

1 Opening frame 2 Window 4 Switching base 5 Locking frame (Hanging body)
6 Switching tool 7 Connecting pin 8 Checking arm 12 Switching groove 13 Lock groove 18 Lock pin (locked body)
20 Engagement pin (engagement body)
41 Lock body 45 Lock plate 46 Release lever (lock release tool)

Claims (7)

A switching base (4) is provided on one of the opening frame (1) and the window (2), and a latching body (5) that engages with the check arm (8) is provided on the other.
The switching base (4) is provided with a switching tool (6) for switching the check arm (8) between the ventilation position and the fully open position so as to be reciprocally displaceable.
One end of the check arm (8) is connected to the switching tool (6) via a connecting pin (7) so as to be swingable, and the other end of the check arm (8) is engaged with the latching body (5). (20) is provided,
In a state where the check arm (8) is switched to the ventilation position by the switching tool (6), the engagement body (20) and the hooking body (5) of the check arm (8) are connected to ventilate the window (2). It is a stay that can be controlled to open in position,
A lock structure is provided between the switching base (4) and the check arm (8) to restrict the check arm (8) from returning from the ventilation position to the closed position.
The lock structure includes a lock body (41) supported by the switching base (4) so as to be displaceable between a lock position and an unlock position, and a locked body (18) fixed to the check arm (8).
A stay for window ventilation in which the locked body (18) is locked and engaged with the lock body (41) and the displacement in the closing direction of the check arm (8) can be regulated in a state where the window (2) is opened to the ventilation position. The lock structure includes a lock body (41), a lock pin (18) fixed near one end of the check arm (8), and a lock spring (42) that urges the lock body (41) to move toward the lock position. Including
The switching base (4) is formed with a switching groove (12) for moving and guiding the connecting pin (7) and the lock pin (18), and a lock groove (13) for guiding the rock pin (18) to swing. ,
The lock body (41) includes a lock plate (45) for preventing the return movement of the lock pin (18) and an unlocking tool (46) for unlocking the lock body (41).
The lock plate (45) is provided with a lock piece (47) crossing the lock groove (13) at the lock position,
A stopper portion (47b) that prevents the return movement of the lock pin (18) at one peripheral edge of the lock piece (47) is displaced in the unlocking direction by the lock pin (18) at the other peripheral edge of the lock piece (47). Introduced guide portions (47a) are respectively formed,
The stay for window ventilation according to claim 1, wherein the lock pin (18) displaced to the ventilation position can be automatically locked and held by the lock body (41).   The stay for window ventilation according to claim 1 or 2, wherein the lock body (41) is pivotally supported by a swing shaft (49) so as to be reciprocally swingable between a lock position and an unlock position.   The stay for window ventilation according to claim 1 or 2, wherein the lock body (41) is supported by the switching base (4) so as to be slidable back and forth between the lock position and the lock release position. A holding pin (51) is provided on the lock body (41),
The stay for window ventilation according to claim 2, 3 or 4, wherein a catch body (43) for engaging and holding the holding pin (51) switched to the unlocking position is provided on the switching base (4). A reset piece (48) is provided on the lock body (41),
The reset piece (48) crossing the lock groove (13) in the unlocked position is switched by the lock pin (18) that moves back from the lock groove (13) to the switching groove (12), and the lock body (41) The stay for window ventilation according to claim 2, 3 or 5, which can automatically return to the lock position. The switching tool (6) is supported by the switching base (4) so as to be slidable back and forth between the ventilation position and the fully open position.
A kick spring (31) for holding the switching tool (6) at each switching position between the ventilation position and the fully open position is disposed between the switching tool (6) and the switching base (4). The stay for window ventilation in any one of 6.

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