JP2017155473A - Opening amount restriction device for window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost required for production by achieving simplification of the structure of the entire device, and to improve durability by solving the concentration of an impact load to a base when a window is opened suddenly.SOLUTION: An opening amount restriction device includes: a base 6 provided at a window frame 1; a restraining arm 8; a support shaft 7 for supporting the arm 8 swingably in inside and outside directions; and a switching structure for performing a slide operation of the restraining arm 8 between an open regulation position and a regulation release position. At the restraining arm 8, a stopper part 26 is formed for restricting a window 2 being opened over a predetermined open position. The stopper part 26 is continuously extended from an arm wall around the support shaft 7, and a contact surface 27 is provided at a projecting end. In a state where the restricting arm 8 swings to a ventilation open position, the contact surface 27 of the stopper part 26 is received by a reception surface 14 provided on a base 6 side, and it is restricted that the window 2 swings over the ventilation open position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a window opening restriction device that can restrict a window to be opened by a check arm at a ventilation position, and can release the restriction by the check arm when necessary to open the window from a closed position to a fully open position.

  This kind of opening amount limiting device is disclosed in Patent Document 1 according to the proposal of the present applicant. As shown in FIG. 17, the ventilation stay (opening restriction device) according to Patent Document 1 is supported by a base 56 fixed to the window frame 51 and a support shaft 57 fixed to the base 56 so as to be swingable inward and outward. A check arm 58, a latch pin 59 fixed to a vertical frame portion of the window 52, an operation tool 83 for switching the check arm 58 to a fully open position and a ventilation position, and the like. The base 56 is made of an aluminum strip, and a guide groove 60 having a C-shaped cross section is formed on one side thereof. A recess 66 that allows the latch pin 59 to enter when the window 52 is closed is bent in the middle of the plate surface of the check arm 58, and the swinging tip of the check arm 58 from the step wall facing the recess 66 is formed. A connecting groove 70 that engages with the latch pin 59 is formed. A slide groove 69 is formed at the upper end of the check arm 58 and is slidably guided by a support shaft 57 fixed to the base 56.

  The operating tool 83 is integrated with the slider 82 that is guided and supported by the base 56 so as to be slidable up and down, an operation plate 86 that is caulked and fixed to the slider 82 via a connection pin 89, and the slider 82 via the previous connection pin 89. It is composed of a switching knob 87 and the like. The assembled operating tool 83 can be slid up and down between the fully open position and the ventilation position along the guide groove 60 of the base 56, and when the switching knob 87 is slid from the fully open position to the ventilation position, the connecting groove 70 of the check arm 58 is connected. Can be engaged with the latch pin 59 on the window side. In the ventilation stay of Patent Document 1, the switching knob 87 can be attached to and detached from the slider 82. However, in most of the ventilation stays currently provided on the market (hereinafter referred to as current products), the switching knob 87 is a connecting pin. At 89, the slider 82 and the operation plate 86 are fixed by caulking.

  In order to allow the check arm 58 to swing in and out, the operation plate 86 is formed with a partial arc-shaped operation groove 92, and the check arm 58 has an engagement pin 79 that engages with the operation groove 92. It is provided. The check arm 58 is provided with a stopper pin 80 in addition to the engagement pin 79. The stopper pin 80 is provided to restrict the swinging of the restraining arm 58 to the outdoor side until the restraining arm 58 slides from the fully open position to the ventilation position. Both the engaging pin 79 and the stopper pin 80 are formed of a stainless steel round pin and are fixed to the check arm 58 by caulking. Further, in the current product, a trapezoidal guide piece 63 is fixed to the base 56 with screws in order to support the operation plate 86 that is easily elastically deformed in the thickness direction. In addition, a notch portion 64 that allows the engagement pin 79 to enter and exit is formed in the side edge rib 62 on the outdoor side of the base 56. As described above, Patent Literature 2 and Patent Literature 3 disclose an opening amount limiting device in which an engagement pin is caulked and fixed to a check arm and an operation groove is provided on an operation tool or a base.

JP 2010-116742 A (paragraph numbers 0026 to 0027, FIG. 3) JP 2014-118716 A (summary, FIG. 3) JP 2009-138368 A (paragraph numbers 0018 to 0036, FIG. 3)

  According to the ventilation stay and the open amount restriction device of the current product of Patent Document 1, the latch pin 59 is introduced into the connecting groove 70 by switching the check arm 58 from the fully open position to the ventilation position with the operation tool 83. In combination, the opening of the window 52 can be restricted at the ventilation position. Further, by operating the check arm 58 to slide down from the ventilation position to the fully open position with the operation tool 83, the connecting groove 70 can be detached from the latch pin 59, and the window 52 can be opened from the closed position to the fully open position. This ventilation stay can be assembled in a small gap between the window 52 and the window frame 51, and has the feature that it can be installed as it is without having to cut out the window frame 51, so it has gained market support for many years. It has been.

  However, in the ventilation stay and the current product of Patent Document 1, the peripheral surface of the engagement pin 79 is brought into contact with the side edge rib 62 of the base 56 at the ventilation release position where the window 52 is opened and restricted by the check arm 58. It further restricts the check arm 58 from swinging in the opening direction. For this reason, when the window 52 is suddenly opened from the closed position to the ventilation position, the engaging pin 79 collides with the side edge rib 62, and the impact load is concentrated on the base 56 formed of the aluminum strip and is easily damaged.

  With regard to the structure of the check arm 58, it is necessary to prepare an engagement pin 79 and a stopper pin 80 that have been turned in advance, and to fix these pins 79 and 80 in the caulking holes formed in the check arm 58. Therefore, the number of processing steps for the check arm 58 is large, and the cost is increased accordingly. Moreover, it is necessary to form the side edge rib 62 notch part 64 of the base 56, and the whole cost of the ventilation stay was high as a whole. Further, in the current product, the guide piece 63 is fixed to the base wall facing the operation plate 86 of the operation tool 83 and the deformation of the operation plate 86 toward the base wall is restricted. The overall cost was even higher.

  Moreover, the ventilation stay and current product of Patent Document 1 have room for improvement in that a complicated process is involved in assembly. At the time of assembly, first, the engaging pin 79 and the stopper pin 80 are caulked and fixed to the check arm 58, and the support shaft 57 inserted through the slide groove 69 and the spring (not shown) on the arm is caulked and fixed to the base 56. The first assembly is assembled by integrating the check arm 58, the spring, and the base 56 together. Also, the second assembly is assembled by caulking and fixing the slider 82 and the operation plate 86 with the connecting pin 89. Next, the slide part 84 of the slider 82 is inserted and engaged with the guide groove 60 of the base 56 from below to integrate the second assembly with the first assembly. At this time, the upper edge of the operation plate 86 of the operation tool 83 contacts and interferes with the engagement pin 79 fixed to the check arm 58. Moreover, the outer surface of the operation plate 86 is covered with a cover wall (not shown) provided integrally with the slide portion 84 and cannot be directly recognized. Therefore, the operator, while looking into the contact state between the operation plate 86 and the engagement pin 79 from the gap on the lower edge side of the cover wall, elastically deforms the operation plate 86 toward the base 56 side with tweezers within a narrow gap, The engagement pin 79 has to be operated so as to get over the operation plate 86 to drop into the operation groove 92 to be engaged, which requires a lot of work.

An object of the present invention is to realize the simplification of the structure of the opening restriction device and reduce the cost required for manufacturing the entire device.
The object of the present invention is to improve the stopper structure when the check arm is tilted to the ventilation opening position, to eliminate the concentration of impact load on the base when the window is suddenly opened, and to improve the durability. The object is to provide an opening amount limiting device.
It is an object of the present invention to simultaneously reduce the cost required for manufacturing the entire device by simultaneously realizing simplification of the structure of the opening amount limiting device and facilitating assembly.

  The window opening restriction device according to the present invention is provided between the window frame 1 and the window 2 that can be freely opened and closed, and restricts the opening of the window 2 at a predetermined opening position. The opening amount limiting device includes a base 6 provided in the window frame 1 or the window 2, a check arm 8 supported so as to be swingable inward and outward by a support shaft 7 fixed to the base 6, and a check arm 8 in an open restriction position. And a switching structure for performing a slide switching operation at the restriction release position. A stopper portion 26 that restricts the opening of the window 2 beyond a predetermined opening position is formed on the check arm 8. As shown in FIG. 1, the stopper portion 26 extends from the upper arm wall of the check arm 8 positioned around the support shaft 7, and a contact surface 27 is provided at the protruding end. In a state where the check arm 8 accompanies the window 2 and swings to a predetermined opening position, the contact surface 27 of the stopper portion 26 is received by the receiving surface 14 provided on the base 6 side, and the window 2 is opened to the predetermined degree. It is characterized by restricting swinging beyond the position. In the present invention, the receiving surface 14 provided on the base 6 side includes a case where the receiving surface 14 is provided only on the base 6 and a case where the receiving surface 14 is provided over both the base 6 and the slider 32. I will do it.

  As shown in FIG. 4, the switching structure includes a slider 32 that is slidably engaged and guided by the guide groove 10 of the base 6, and an operating tool 33 that slides the slider 32. The operating arm 36 and the check arm 8 of the operating tool 33 are provided with an engaging projection 29 and an operating groove 42 that relatively swing when engaged with each other when the arm 8 swings inward and outward. The engagement protrusion 29 is formed integrally with the check arm 8 or the operation arm 36.

  A slide groove 19 slidably guided by a support shaft 7 fixed to the base 6 is formed in the check arm 8. As shown in FIG. 4, a rotation regulating surface 28 that is continuous with the contact surface 27 is formed on the periphery of the stopper portion 26. In a state where the check arm 8 is switched from the open restriction position to the restriction release position by the operation tool 33, the rotation restriction surface 28 is brought into contact with the receiving surface 14 of the base 6 to restrict the swing of the check arm 8.

  The engagement protrusion 29 is formed integrally with the arm 8 by pressing the check arm 8. In a state in which the operation tool 33 is assembled to the base 6, the side edge rib 12 of the base 6 and the side edge of the operation arm 36 face each other through the gap E (see FIG. 1). When the operating tool 33 is assembled to the base 6, the engaging protrusion 29 moves over the plate wall while elastically deforming the operating arm 36 along the gap E, and the engaging protrusion 29 falls into the operating groove 42 and engages. Let

  The engagement protrusion 29 is formed by any one of bending, half blanking, burring, drawing and cutting. Examples of these processes are shown in FIGS. 10 to 12.

  A bending process is applied to the check arm 8 to form an engagement protrusion 29 on the periphery of the check arm 8 positioned around the support shaft 7. As shown in FIG. 6, the engaging protrusion 29 is bent in a “<” shape when viewed from the protruding end side.

  The operation tool 33 includes an operation arm 36 bent in a step shape and a switching knob 37 fixed to one end of the operation arm 36. The middle part of the operation arm 36 is fixed to the slider 32, and an operation groove 42 is formed in the connecting wall 41 of the operation arm 36. A support rib 13 for supporting the connecting wall 41 of the operating arm 36 is formed on the mounting seat 11 of the base 6 formed of an aluminum strip (see FIG. 8).

  In the window opening restriction device according to the present invention, the stopper arm 26 is formed on the check arm 8 to restrict the window 2 from being opened beyond a predetermined opening position. In addition, the stopper portion 26 is extended from the upper arm wall of the check arm 8 located around the support shaft 7, and a contact surface 27 is provided at the protruding end. In addition, when the check arm 8 is accompanied by the window 2 and swings to a predetermined open position, the contact surface 27 of the stopper portion 26 is received by the receiving surface 14 provided on the base 6 side, and the window 2 is It was made possible to regulate swinging beyond a predetermined opening position. According to such an opening amount limiting device, it is possible to omit the stopper pin that has been indispensable in this type of conventional device, and furthermore, it is possible to omit the caulking processing of the stopper pin and the notch processing for forming the notch portion. Accordingly, the structure of the opening limit device can be simplified, and the cost required for manufacturing the entire device can be reduced. Further, in the state where the contact surface 27 is received by the receiving surface 14, the contact surface 27 and the receiving surface 14 come into surface contact so that the external force acting on the check arm 8 can be dispersed. When the valve is suddenly opened, the concentration of the impact load on the base 6 can be eliminated, and the durability of the opening amount limiting device can be improved.

  In the opening amount limiting device in which the slider 32 and the operation tool 33 constitute a switching structure, and the operation protrusion 36 and the check arm 8 of the operation tool 33 are provided with the engagement protrusion 29 and the operation groove 42, the engagement protrusion 29 is connected to the check arm 8 or It was formed integrally with the operating arm 36. According to such an opening amount limiting device, the engagement pins can be omitted in addition to the stopper pins, and further, the plate processing and caulking processing applied to the check arm 8 to fix these pins can be omitted. The structure of the restriction device can be further simplified, and the cost required for manufacturing the entire device can be further reduced.

  According to the opening amount limiting device in which the rotation restricting surface 28 is formed on the periphery of the stopper portion 26 instead of the stopper pin, the rotation restricting surface 28 of the base 6 is moved in a state where the check arm 8 is switched to the restriction releasing position. By making contact with the receiving surface 14, the swinging of the check arm 8 can be restricted. Therefore, the number of parts can be reduced and the cost can be reduced while exhibiting the same function as the swing restricting action of the check arm 8 by the stopper pin.

  According to the opening restriction device in which the check arm 8 is pressed to form the engagement protrusion 29, the engagement protrusion 29 moves the operation arm 36 along the gap E when the operation tool 33 is assembled to the base 6. The engagement protrusion 29 can be dropped into the operation groove 42 and can be engaged by overcoming the plate wall while being elastically deformed. In other words, the operation tool 33 is simply assembled to the base 6 and the engagement protrusion 29 is formed in the operation groove 42 without going through a complicated assembly process that has been a great barrier to improving the productivity of the conventional ventilation stay. Can be engaged. Further, after the engagement protrusion 29 is engaged with the operation groove 42, the operation arm 36 returns to its pre-deformation state by its own elasticity, so that the engagement protrusion 29 does not come off from the operation groove 42. Therefore, compared with the conventional ventilation stay, simplification of the structure of the opening limit device and simplification of assembly can be realized at the same time, and the cost required for manufacturing the entire device can be further reduced.

  The engagement protrusion 29 can be formed by any one of bending, half-blanking, burring, drawing, and cutting and raising, and the engagement pin is formed as an independent part regardless of the processing method. Compared to the above, the engagement protrusion 29 can be formed at a low cost.

  An engagement protrusion 29 is formed on the periphery of the check arm 8 positioned around the support shaft 7 and the engagement protrusion 29 is bent in a “<” shape when viewed from the protrusion end side. As described above, according to the engagement protrusion 29 that is bent into a “<” shape and has a strengthened structural strength, when the engagement protrusion 29 is slid up and down by the operation arm 36, the engagement protrusion 29 is The elastic deformation can be prevented, and the vertical sliding motion of the operation tool 33 can be reliably transmitted to the check arm 8. Therefore, the check arm 8 can be reliably switched between the open restriction position and the restriction release position while simplifying the structure as compared with the conventional ventilation stay in which the engagement pin is caulked and fixed.

  According to the opening amount limiting device in which the support rib 13 for supporting the connecting wall 41 of the operating arm 36 is formed on the mounting seat 11 of the base 6, the guide piece used in the conventional device and the screw for fastening the piece are provided. Since it can be omitted, the structure of the opening restriction device can be further simplified, and the cost required for manufacturing the entire device can be further reduced.

It is a front view of the principal part of the opening amount restriction | limiting apparatus which concerns on this invention. It is a schematic plan view which shows the usage example of an opening amount limiting device. It is a front view of the opening amount restriction | limiting apparatus of the state which is carrying out the opening control of the window in the ventilation open position. It is a front view of the state which switched the check arm to the restriction release position. It is a front view of the state which switched the check arm to the open restriction position. It is a perspective view of a check arm. 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 explanatory drawing which shows the assembly process of an opening amount limiting device. It is sectional drawing which shows the modification of an engaging protrusion. It is sectional drawing which shows another modification of an engaging protrusion. It is a perspective view which shows another modification of an engaging protrusion. It is a perspective view which shows the modification of the contact structure of a receiving surface and a contact surface. It is sectional drawing which shows another modification of the contact structure of a receiving surface and a contact surface. It is a front view which shows another modification of the contact structure of a receiving surface and a contact surface. It is sectional drawing which shows another modification of the contact structure of a receiving surface and a contact surface. It is a front view of the conventional ventilation stay.

(Example 1) FIG. 1 thru | or FIG. 9 shows Example 1 of the opening amount limiting device based on this invention. In FIG. 2, reference numeral 1 is a window frame made of aluminum sash, and 2 is a window. The window 2 is supported by a plurality of pairs of hinges 3 fixed to the window frame 1 so as to be swingable and openable around a vertical axis. When the window 2 is closed, the window 2 is fixed so as not to be opened with a lock (not shown). Can hold. In order to open the window 2 from the closed position to the ventilation open position (predetermined open position) and the fully open position, the opening amount is limited to the gap between the vertical frame of the window 2 and the vertical frame of the window frame 1 A device is provided.

  3 to 5, the opening restriction device includes a base 6 fastened and fixed to the window frame 1, and a check arm 8 that is supported by a support shaft 7 fixed to the base 6 so as to be swingable inward and outward of the window frame 1. The connecting pin (arm connecting body) 9 fixed to the window vertical frame of the window 2 and a switching structure for sliding the switching arm 8 to the open restriction position and the restriction release position are configured. The support shaft 7 is formed in a drum shape by cutting a stainless steel round shaft material. As shown in FIG. 7, the base 6 is formed of an aluminum extruded strip having a guide groove 10 having a C-shaped cross section on one side and a flat mounting seat 11 adjacent to the guide groove 10. Side edge ribs 12 are provided on the outer edge. As shown in FIG. 8, a support rib 13 for supporting a connecting wall 41 to be described later is cut and formed in a partial arc shape in the middle of the mounting seat 11 adjacent to the side edge rib 12. Two upper and lower portions of the mounting seat 11 apart from the support ribs 13 are fixed to the window frame 1 with screws 5. The upper end surface of the peripheral wall surrounding the guide groove 10 functions as a receiving surface 14 that receives a contact surface 27 of a stopper portion 26 described later.

  In FIG. 6, the check arm 8 is formed as a vertically long arm obtained by pressing a stainless steel plate material, a concave portion 16 formed by bending in the middle of the upper and lower sides, an arm base portion 17 on the upper half side of the concave portion 16, An arm tip 18 on the lower half side of the recess 16 is integrally provided. A vertically long slide groove 19 slidably guided by the support shaft 7 is formed near the upper end of the arm base portion 17, and a connecting groove 20 that engages with the connecting pin 9 is formed in the recess 16 in the arm tip portion 18. It is formed from the lower step wall facing the lower end of the arm tip 18. A spring plate 21 that elastically engages and captures the connecting pin 9 at the time of ventilation opening is fixed facing the groove end of the connecting groove 20 (see FIG. 3). The lower end of the slide groove 19 is formed in a round hole shape, and the other part is formed by a groove corresponding to the flat surface width of the spindle 7 whose section is a drum shape. A guard wall 22 for bending the restraining arm 8 switched to the restriction release position from swinging to the outdoor side is formed at the side edge of the concave portion 16 on the indoor side.

  As shown in FIG. 5, a beak-shaped stopper portion 26 is formed on the inner periphery of the upper arm wall facing the slide groove 19 at the upper portion of the arm base portion 17, and an oblique contact surface 27 is formed at the protruding end. It is. A horizontal rotation restricting surface 28 is formed continuously from the lower end of the contact surface 27. Further, an engagement protrusion 29 that is relatively rocked while being engaged with an operation groove 42 described later is formed on the shoulder portion on the indoor side of the strip-shaped wall continuous to the recess 16. The engagement protrusion 29 engages with the operation groove 42 and is slid up and down by the operation tool 33. In order to prevent elastic deformation due to the sliding force of the operation tool 33, the engagement protrusion 29 is moved from the protruding end side. As you can see, it has been folded into a "" As described above, according to the engagement protrusion 29 that is bent into a “<” shape and has increased structural strength, the vertical sliding force of the operating tool 33 is reliably transmitted to the check arm 8 and the check arm 8 is opened. Switching operation can be reliably performed between the restriction position and the restriction release position.

  The switching structure includes a slider 32 that is slidably guided by the guide groove 10 of the base 6 and an operating tool 33 that slides the slider 32. As shown in FIG. 7, the slider 32 is integrally provided with a slide frame portion 34 whose section is “work” shaped to be slid and guided in the guide groove 10, and a cover wall 35 that covers the outer surfaces of the base 6 and the check arm 8. Made of plastic molding. In a state where the slide frame portion 34 is inserted into and engaged with the guide groove 10, the fastening seat 34 a of the slide frame portion 34 is exposed outside the guide groove 10. The operation tool 33 includes an operation arm 36 formed by bending a thin stainless steel plate in a step shape, and a switching knob 37 fixed to an end of the operation arm 36 on the indoor side. The middle part of the operating arm 36 facing the previous fastening seat 34a is fixed by caulking with a pair of upper and lower caulking pins 39 penetrating the slide frame 34, the reinforcing plate 38 and the operating arm 36, and is integrated with the fastening seat 34a. An operation groove 42 that engages with the previous engagement protrusion 29 is formed in a partial arc shape on the connecting wall 41 provided at the outdoor end of the operation arm 36 (see FIG. 1). A screw hole 43 for screwing the screw 5 is opened in the cover wall 35 (see FIG. 9A). The driver hole 43 is closed with a cap after the screw 5 is fastened.

  The opening amount limiting device is shipped with each of the above components assembled as a single unit component. At the time of assembly, first, the spring plate 21 is caulked and fixed to the check arm 8, and then the slide groove 19 of the check arm 8 and the compression coil-shaped taper spring 45 are caulked and fixed to the base 6 while being inserted into the support shaft 7. The first assembly is assembled by integrating the check arm 8, the taper spring 45, and the base 6 (see FIG. 9A). Further, the slider 32 and the operating arm 36 are caulked and fixed with caulking pins 39 to form the second assembly. Next, the slider 32 is inserted into and engaged with the guide groove 10 of the base 6 from below, and the second assembly is integrated with the first assembly to form unit parts. In this state where the operating tool 33 is assembled to the base 6, the connecting wall 41 of the operating arm 36 is received by the support rib 13 of the base 6, and the side edge rib 12 of the base 6 and the operating arm 36 are connected. The side edges of the connecting wall 41 are opposed to each other through the gap E (see FIG. 9C).

  When the second assembly is integrated with the first assembly, the slide frame portion 34 is inserted into the guide groove 10 of the base 6 from below and engaged, and the slider 32 is pushed up. At this time, when the check arm 8 is swung to the ventilation release position and the slider 32 is pushed up, the upper edge of the connecting wall 41 is brought into the engagement protrusion 29 provided on the check arm 8 as shown in FIG. Get in touch. In this state, the engagement protrusion 29 faces the upper end of the previous gap E in a state where the thickness in the horizontal direction is minimized because the check arm 8 is swung to the ventilation opening position. Therefore, when the slider 32 is continuously pushed up, the engaging projection 29 rides on the plate wall of the wall 41 while elastically deforming the upper corner of the connecting wall 41, and is above the operation groove 42 as shown in FIG. The arm wall 44 is moved over the arm wall 44 while elastically deforming the arm wall 44 toward the mounting seat 11, and is dropped into the operation groove 42 and engaged as shown in FIG. After the engagement protrusion 29 drops into the operation groove 42 and engages, the arm wall 44 above the operation groove 42 returns to the posture before elastic deformation by its own elasticity, so that the engagement protrusion 29 moves from the operation groove 42. It can be prevented from coming off.

  In the above state, when the check arm 8 is returned and swung from the ventilation open position to the closed position as shown in FIG. 4, the engagement protrusion 29 faces the end of the operation groove 42 on the indoor side. Finally, the switching knob 37 is fastened to the operating arm 36 with a screw to complete the opening amount limiting device. In addition, when constructing the opening restriction device, it is only necessary to fix the connecting pin 9 to the window 2 and fasten the base 6 to the window frame 1 with the screw 5, and to construct the opening restriction device with less effort. .

  When the window 2 is closed, the switching knob 37 can be slid up and down to slide the check arm 8 between the upper open restriction position and the lower restriction release position. As shown in FIG. 5, in the state where the check arm 8 is switched to the open restriction position, the connecting groove 20 engages with the connecting pin 9, so that when the window 2 is opened, the check arm 8 accompanies the window 2. It is possible to restrict the window 2 from being further opened when the connecting pin 9 is in contact with the groove end of the connecting groove 20 while swinging to the outdoor side. In this ventilation opening position, as shown in FIG. 1, the contact surface 27 of the stopper portion 26 is received in a surface contact manner by the receiving surface 14 of the base 6. Therefore, even when the window 2 is suddenly opened from the closed position, the deformation of the receiving surface 14 and the contact surface 27 can be eliminated. Accordingly, the concentration of the impact load on the base 6 can be eliminated to improve the durability of the opening amount limiting device, and the variation in the opening angle of the window 2 at the ventilation opening position can be suppressed.

  In the state where the check arm 8 is switched to the open restriction position, the connecting wall 41 of the operation arm 36 is received by the support rib 13 formed on the base 6 as shown in FIG. Can be smoothly switched. Incidentally, when the window 2 is opened to the ventilation opening position, the contact surface 27 of the stopper portion 26 is received by the receiving surface 14 of the base 6 so that the window 2 is opened beyond the ventilation opening position. Therefore, it is not necessary to receive the engaging protrusion 29 by the side edge rib 12 of the base 6. Therefore, even when the window 2 receives a gust of wind and receives a force in the opening direction at the ventilation opening position, the engagement protrusion 29 is not strongly pressed by the side edge rib 12, and the engagement protrusion 29 and the side edge rib 12 are not pressed. A large external force does not act.

  When the window 2 is closed from the ventilation opening position, the check arm 8 accompanies the window 2 and swings indoors to return to the state before opening. In this state, when the switching knob 37 is pushed down as shown in FIG. 4, the check arm 8 slides to the restriction release position, and the upper end of the slide groove 19 is supported by the support shaft 7. The surface 28 contacts the outer corner portion of the receiving surface 14. Therefore, it is possible to restrict the check arm 8 from swinging to the outdoor side at the restriction release position. Incidentally, the spindle 7 having a drum-shaped cross section slides the slide groove 19 on the opposed flat surface, but there is room for swinging inward and outward within the margin of the flat surface and the slide groove 19. Therefore, at the restriction release position, the rotation restricting surface 28 contacts the receiving surface 14 and restricts the swinging of the check arm 8 toward the outdoor side. In a state where the check arm 8 is switched to the restriction release position, the connecting groove 20 is separated from the connecting pin 9. Therefore, the window 2 can be opened from the closed position to the fully opened position.

  According to the opening amount limiting device configured as described above, the engagement pin and the stopper pin, which are indispensable in the conventional device, can be omitted, and further, the screw for fastening the guide piece and the same piece can be omitted. Further, the caulking process of the engagement pin and the stopper pin and the notch process for forming the notch part can be omitted. In addition, the assembly of the second assembly with respect to the first assembly can be easily performed with less effort. Therefore, according to the above opening amount limiting device, simplification of the structure of the entire device and ease of assembly can be realized simultaneously, and the cost required for manufacturing the entire device can be reduced. Further, even when the window 2 is suddenly opened from the closed position, the contact surface 27 of the stopper portion 26 is received by the receiving surface 14 of the base 6 in a surface contact state, and the receiving surface 14 is deformed. Since it can be eliminated, the concentration of the impact load on the base 6 can be eliminated, and the durability of the opening restriction device can be improved.

  In the above-described embodiment, the case where the engaging protrusion 29 is formed by bending is described, but it is not necessary. The engaging protrusion 29 is not only bent, but also half-punched, burring, drawn, cut and raised. It may be formed by any one of the processing. Specifically, as shown in FIG. 10 (a), the arm wall of the check arm 8 is half-punched to form a circular protrusion-like engagement protrusion 29, or as shown in FIG. 10 (b), The arm wall of the check arm 8 can be subjected to burring to form a round cylindrical engagement protrusion 29.

  Further, as shown in FIG. 11 (a), the arm wall of the check arm 8 is cut and raised to form an L-shaped engagement protrusion 29, or as shown in FIG. 11 (b), the check arm. The trapezoidal engagement protrusion 29 can be formed by cutting and raising the eight arm walls.

  Further, as shown in FIG. 12 (a), the arm wall of the check arm 8 is drawn or bent to form a housing-like engagement protrusion 29, or as shown in FIG. 12 (b). The arm-shaped wall of the check arm 8 is drawn to form a curved engaging projection 29 which is curved, or the arm wall of the check arm 8 is drawn as shown in FIG. A triangular rib-like engagement protrusion 29 can be formed. As can be understood from the above modifications, the shape and structure of the engaging protrusion 29 can be freely selected as long as it is formed integrally with the arm wall of the check arm 8. In FIG. 12, the engagement protrusion 29 is formed as a protrusion continuous inward and outward, so that a notch is formed in the side edge rib 12 of the base 6 so that the engagement protrusion 29 can enter and exit from the notch. Good.

  The contact structure of the receiving surface 14 and the contact surface 27 can be changed as shown in FIGS. In FIG. 13, the abutting surface 27 is formed by bending the tip of the stopper portion 26 into an L shape, the contact area between the receiving surface 14 and the abutting surface 27 is increased, and the impact load acting on the receiving surface 14 is dispersed. The durability of the base 6 can be improved.

  In FIG. 14, the groove bottom wall of the guide groove 10 is bent toward the groove upper end side to form the receiving surface 14, the contact area between the receiving surface 14 and the contact surface 27 is increased, and the impact load acting on the receiving surface 14. To improve the durability of the base 6.

  In FIG. 15, the receiving surface 14 is configured by the upper end surface of the peripheral wall surrounding the guide groove 10 and the upper end surface of the slide frame portion 34, and the contact surface 27 of the stopper portion 26 is received. In this case, similarly to the above contact structure, the contact area between the receiving surface 14 and the contact surface 27 can be increased to disperse the impact load acting on the receiving surface 14.

  In FIG. 16A, the contact surface 27 of the stopper portion 26 is provided over the upper end surface of the peripheral wall surrounding the guide groove 10, the upper end surface of the slide frame portion 34, and the upper end surface of the reinforcing plate 38. I tried to accept it. In this case, similarly to the above contact structure, the contact area between the receiving surface 14 and the contact surface 27 can be increased to disperse the impact load acting on the receiving surface 14. In FIG. 16 (b), the contact surface 27 of the stopper portion 26 is received by the receiving surface 14 provided over the upper end surface of the peripheral wall surrounding the guide groove 10 and the receiving wall 38 a formed by bending the upper end of the reinforcing plate 38. I did it. In this case, similarly to the above contact structure, the contact area between the receiving surface 14 and the contact surface 27 can be increased to disperse the impact load acting on the receiving surface 14. There is also an advantage that the slide frame portion 34 can be protected by covering the center portion of the upper end surface of the slide frame portion 34 with the receiving wall 38a. As can be understood from the above embodiments, the receiving surface 14 may be provided only on the base 6 or may be provided over both the base 6 and the slider 32.

  The opening restriction device according to the present invention can be applied to windows such as a projecting window, an inward-facing window, a vertical rotating window, and a horizontal rotating window in addition to the swinging window without any trouble. In the above embodiment, the engagement protrusion 29 is formed on the check arm 8 and the operation groove 42 is formed on the connecting wall 41 of the operation arm 36. However, the operation groove 42 is formed on the check arm 8 and the operation arm 36 is connected. An engagement protrusion 29 may be formed on the wall 41. Contrary to the above embodiment, the base 6 and the restraining arm 8 may be disposed on the window 2, and the arm coupling body 9 may be disposed on the window frame 1. If necessary, a rubber cap can be attached to the stopper portion 26 to absorb the impact when the window 2 is suddenly opened by being blown by the wind. The support shaft 7 may be formed into a square or rectangular cross section by subjecting a stainless steel round shaft material to header processing.

DESCRIPTION OF SYMBOLS 1 Window frame 2 Window 7 Support shaft 8 Checking arm 9 Arm connection body (connection pin)
DESCRIPTION OF SYMBOLS 10 Guide groove 11 Mounting seat 12 Side edge rib 13 Support rib 14 Receiving surface 26 Stopper part 27 Contact surface 28 Rotation restricting surface 29 Engagement protrusion 32 Slider 33 Operation tool 36 Operation arm 37 Switching knob 41 Connection wall 42 Operation groove

Claims (7)

An opening amount limiting device for a window, which is provided between the window frame (1) and the window (2) that can be freely opened and closed and restricts the opening of the window (2) at a predetermined opening position,
The opening limit device is a check arm supported by a base (6) provided on the window frame (1) or window (2) and a support shaft (7) fixed to the base (6) so as to be swingable inward and outward. (8) and a switching structure for sliding the check arm (8) to the open restriction position and the restriction release position,
A stopper part (26) for restricting the window (2) from being opened beyond a predetermined opening position is formed on the check arm (8),
The stopper portion (26) is extended from the upper arm wall of the check arm (8) located around the support shaft (7), and a contact surface (27) is provided at the protruding end thereof.
In a state where the check arm (8) accompanies the window (2) and swings to a predetermined open position, the contact surface (27) of the stopper portion (26) provided on the base (6) side (14) ) And restricts the window (2) from swinging beyond a predetermined opening position. The switching structure includes a slider (32) that is slidably engaged and guided in the guide groove (10) of the base (6), and an operating tool (33) that slides the slider (32).
An engaging protrusion (29) that relatively swings in an engaged state with the operating arm (36) and the check arm (8) of the operating tool (33) when the arm (8) swings inward and outward. An operation groove (42) is provided,
2. The window opening limit device according to claim 1, wherein the engaging projection (29) is formed integrally with the check arm (8) or the operating arm (36). A slide groove (19) slidably guided by a support shaft (7) fixed to the base (6) is formed in the check arm (8),
A rotation restricting surface (28) continuous to the contact surface (27) is formed on the periphery of the stopper portion (26),
In the state where the check arm (8) is switched from the open restriction position to the restriction release position by the operation tool (33), the rotation restriction surface (28) contacts the receiving surface (14) of the base (6), The window opening limit device according to claim 1 or 2, wherein the swinging of the check arm (8) is restricted. The engaging projection (29) is formed integrally with the arm (8) by pressing the check arm (8).
In a state where the operation tool (33) is assembled to the base (6), the side edge rib (12) of the base (6) and the side edge of the operation arm (36) are opposed to each other with a gap (E) between them.
When the operating tool (33) is assembled to the base (6), the engaging projection (29) gets over the plate wall while elastically deforming the operating arm (36) along the gap (E), and the engaging projection ( 29. A device for limiting the amount of opening of a window according to claim 2, wherein 29) is lowered and engaged with the operation groove (42).   5. The window opening limit according to any one of claims 2 to 4, wherein the engagement protrusion (29) is formed by any one of bending, half-blanking, burring, drawing and cutting. apparatus. An engagement protrusion (29) is formed on the periphery of the check arm (8) positioned around the support shaft (7) by bending the check arm (8),
The window opening limit device according to any one of claims 2 to 5, wherein the engaging protrusion (29) is bent in a "<" shape when viewed from the protruding end side. The operation tool (33) includes an operation arm (36) bent in a step shape and a switching knob (37) fixed to one end of the operation arm (36).
The operation arm (36) has an intermediate portion fixed to the slider (32), and an operation groove (42) is formed in the connecting wall (41) of the operation arm (36).
The support rib (13) for supporting the connecting wall (41) of the operating arm (36) is formed on the mounting seat (11) of the base (6) formed of an aluminum strip. The window opening limit device as described in one.

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