Screen door self-propelling prevention device

Abstract

To enable a screen sash self-running prevention device to be automatically locked and enable an indoor operation piece and an outdoor operation piece to have the identical specifications, even if the width of a stile of the screen sash is reduced in the depth direction.SOLUTION: A lock device 3 on the side of a stile 2 includes a hook 11 vertically movable between a position lockable to a receiving member 5 on the side of a doorway frame 4 and a non-lockable position, a first operation piece 13 arranged on the indoor side of the stile 2, a second operation piece 14 arranged on the outdoor side of the stile 2, a case 10 attached to the inside of the stile 2 for holding the hook 11 in a vertically movable manner, and a spring 12 interposed between the hook 11 and the case 10. The hook 11 is vertically moved by the contact with the receiving member 5 and the urging force of the spring 12 when a screen sash 1 is closed. Unlocking operation can be transmitted from insertion parts 38, 42 of the respective operation pieces 13, 14 to the hook 11. A first engagement part 45 of the hook 11 to be engaged with the indoor side insertion part 38 and a second engagement part 46 of the hook 11 to be engaged with the outdoor side insertion part 42 are provided at positions shifted from each other in a direction orthogonal to the depth direction of the stile 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a screen door self-propelling prevention device that prevents a screen door from moving on its own. [Background technology]

[0002] Sliding screen doors are installed so that they run on a rail located on the outside of two-panel sliding doors, four-panel sliding doors, etc. In order to prevent the screen door from moving on its own due to the wind force when exposed to the wind outdoors and opening on its own, a screen door self-propelling prevention device has been used in the past.

[0003] The device for preventing a screen door from moving on its own comprises a locking mechanism attached to one side of the vertical frame of the screen door and the door frame or another screen door, and a receiving member attached to the other side; when the screen door is closed, the locking mechanism's sickle engages with the receiving member to prevent the screen door from moving on its own, and when the screen door is opened, the sickle can be disengaged from the receiving member by manually operating the locking mechanism.

[0004] Conventionally, in order to make the locking device less noticeable on the outside of the screen door, the locking device has been placed inside the vertical frame of the screen door, and operating pieces for manually operating the locking device have been attached to the inside and outside of the vertical frame (Patent Document 1).

[0005] In the screen door self-propelling prevention device disclosed in Patent Document 1, a slit extending in the vertical direction is provided on the front surface of the vertical frame, a sickle is inserted into the vertical frame through this slit, an opening is formed in the vertical frame and the sickle in the front direction of the vertical frame, and a pair of upper and lower insertion parts protruding in the front direction are provided on each of the indoor and outdoor operating pieces, one of the indoor and outdoor insertion parts is passed through the opening on one side of the vertical frame, the upper and lower claws of one insertion part are engaged with the opening of the sickle, the other insertion part is passed through the opening on the other side of the vertical frame and inserted between one of the insertion parts, and the upper and lower claws of the other insertion part are engaged with one of the insertion parts, so that the sickle is suspended by both operating pieces and the sickle can be moved up and down together. Both operating pieces are slid up and down on covers that border the openings on the corresponding sides of the vertical frame. The receiving member is attached to the door frame or the like. The sickle has a hook that protrudes from the visible surface of the vertical stile in the left-right direction toward the receiving member, and is movable between a locked position where the hook can be engaged with the receiving member, and an unlocked position where it cannot be engaged. With the screen door abutting against the door frame or the like, the sickle can be moved from the unlocked position to the locked position, or from the locked position to the unlocked position, by manually sliding the operating piece on the indoor side or the operating piece on the outdoor side. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2007-177458 A Summary of the Invention [Problem to be solved by the invention]

[0007] The screen door self-propelling prevention device in the above-mentioned Patent Document 1 cannot prevent the screen door from self-propelling unless the locking operation is performed by lifting the operating piece on the indoor or outdoor side to put the sickle in the locked position after closing the screen door, so there is a possibility that the user may accidentally forget to perform the locking operation. In order to reliably prevent the screen door from self-propelling, it is preferable to automate the locking operation using the sickle and receiving member.

[0008] However, in the screen door self-propelling prevention device of Patent Document 1, the sickle is suspended between the insertion part of the indoor operating piece and the insertion part of the outdoor operating piece, so both insertion parts support a wide area of ​​the sickle to stabilize it. For this reason, the two insertion parts are interlocked in a male-female relationship to form a four-fold wide suspension support shaft in the vertical direction, and a large opening is formed in the sickle through which it passes. In order to ensure the strength around this large opening, the sickle is made thick in the projection direction. For this reason, if the projection width of the vertical frame is made thin, it becomes difficult to place the above-mentioned automatic locking member inside the vertical frame. In addition, when one of the indoor and outdoor operating pieces is slid by hand to operate the sickle, the other operating piece will inevitably move, and at that time, frictional forces are generated between the indoor and outdoor operating pieces and the cover. Here, for example, when dust and other particles have accumulated between the operating piece on the outside of the room and the cover, or the coefficient of friction has increased over time, sliding the operating piece from the inside of the room will cause a bending moment proportional to the projected thickness of the vertical frame, making it easier for the indoor and outdoor parts to become distorted. As a result, greater operating force will be required on the inside of the room, making locking and unlocking operations difficult.

[0009] In addition, in the screen door self-propelling prevention device of Patent Document 1, it is possible for the indoor and outdoor operating pieces to have the same design in terms of the appearance of the vertical frame, but because the insertion portion of the indoor operating piece and the insertion portion of the outdoor operating piece are combined in a female-male relationship to form the hanging support shaft, the insertion portions cannot be made the same shape and structure, and the indoor operating piece and the outdoor operating piece must be prepared as parts with different specifications, which is disadvantageous in terms of manufacturing costs.

[0010] In view of the above-mentioned background, the problem that this invention aims to solve is to provide a device for preventing a screen door from moving on its own, which can automatically lock the sickle and the receiving member even if the projected width of the screen door's vertical frame is made thin, and which can also make the operating piece on the inside and outside of the room the same specifications. [Means for solving the problem]

[0011] In order to achieve the above object, the present invention provides a screen door self-propelling prevention device which includes a locking device attached to the vertical frame of a screen door and a receiving member attached to the vertical frame of a door frame or another screen door, the locking device having a sickle arranged to be movable up and down between a locked position where it can be engaged with the receiving member and an unlocked position where it cannot be engaged with the receiving member, a first operating piece arranged on the indoor side of the vertical frame of the screen door, and a second operating piece arranged on the outdoor side of the vertical frame of the screen door, the locking device having a case attached to the inside of the vertical frame of the screen door and holding the sickle so that it can be moved up and down, and a spring interposed between the sickle and the case, the sickle acts to close the screen door, The sickle is pushed from the locked position to the unlocked position by abutting against the receiving member when the sickle is in the locked position, and then returned to the locked position by the force of the spring, and the first operating piece and the second operating piece each have an insertion portion that transmits to the sickle an unlocking operation to move the sickle from the locked position to the unlocked position, and the sickle has a first engagement portion that engages with the insertion portion of the first operating piece and a second engagement portion that engages with the insertion portion of the second operating piece, and the first engagement portion and the second engagement portion are positioned at positions offset from each other in a direction perpendicular to the projecting direction of the vertical frame of the screen door.

[0012] According to the above configuration, when the sickle in the locked position comes into contact with the receiving member provided on the door frame or another screen door when the screen door is closed, the sickle is pushed against the spring to the unlocked position, and then returned to the locked position by the urging of the spring. When the sickle is in the locked position, even if the screen door tries to open due to wind force, the sickle is engaged with the receiving member, so that the screen door is prevented from moving on its own. When the user performs an unlocking operation on the first operating piece on the indoor side or the second operating piece on the outdoor side, the insertion portion of the first operating piece or the second operating piece engages with the first engaging portion or the second engaging portion on the corresponding side of the sickle, so that the unlocking operation is transmitted, and the sickle is moved to the unlocked position. When the sickle is in the unlocked position, the sickle is in a positional relationship with the receiving member that does not allow it to be engaged, so that the screen door can be opened. When the user stops the unlocking operation, the sickle is returned to the locked position by the urging of the spring. In this way, it is possible to automatically lock the sickle and the receiving member. In addition, by holding the sickle in a case and attaching the case to the inside of the vertical frame of the screen door, it becomes unnecessary to suspend the sickle between the insertion part of the first operating piece and the insertion part of the second operating piece. Furthermore, by providing the first engagement part where the insertion part of the first operating piece engages with the sickle and the second engagement part where the insertion part of the second operating piece engages with the sickle at positions spaced apart from each other in a direction perpendicular to the projection direction of the vertical frame, it becomes unnecessary to form a large opening that penetrates the sickle in the projection direction, and it becomes possible to make the sickle thinner in the projection direction. By making the sickle thinner in the projection direction, it is possible to obtain a space between the vertical frame and the sickle in the projection direction inside the vertical frame, and therefore it becomes possible to place the case that holds the spring and the sickle inside the vertical frame to achieve automatic locking even if the vertical frame is made thinner in the projection direction. In addition, by providing the first engagement portion with which the indoor insertion portion engages and the second engagement portion with which the outdoor insertion portion engages at positions spaced apart in a direction perpendicular to the projecting direction of the vertical frame, it becomes unnecessary to combine these two insertion portions in a male-female relationship, and it becomes possible to make the indoor operating piece and the outdoor operating piece the same specifications. Effect of the Invention

[0013] In this way, by adopting the above-mentioned configuration, this invention can provide a screen door self-propelling prevention device that can automatically lock the sickle and receiving member even if the projected width of the screen door's vertical frame is made thin, and that can also make the indoor operating piece and the outdoor operating piece the same specifications. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a partially cutaway longitudinal front view showing a screen door self-propelling prevention device according to a first embodiment of the present invention; [Diagram 2] FIG. 2 is a vertical cross-sectional view of both operating pieces removed from the vertical frame together with the right side of the case of the locking device shown in FIG. [Diagram 3] Cross-sectional view of line III-III shown in Figure 1 [Figure 4] An operational diagram showing how the sickle and the receiving member come into contact when the screen shown in Figure 1 is closed. [Diagram 5]FIG. 2 is a plan view showing the connection state of the recessed cover on the indoor side and the operating piece shown in FIG. [Figure 6] A front view of the recessed cover and the operating lever on the indoor side shown in Fig. 5 [Figure 7] FIG. 11 is a plan view showing a screen door self-propelling prevention device according to a second embodiment of the present invention; [Figure 8] FIG. 13 is a partially cutaway longitudinal front view showing a screen door self-propelling prevention device according to a third embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A screen door self-propelling prevention device according to a first embodiment of the present invention will be described with reference to the accompanying drawings, FIGS. 1 to 6. FIG.

[0016] The screen door self-propelling prevention device shown in Figures 1 to 3 comprises a locking mechanism 3 attached to the vertical frame 2 of the screen door 1, and a receiving member 5 attached to a doorway frame 4. This screen door self-propelling prevention device is intended for use in a fitting structure in which a screen door 1 is installed on the outside of a double sliding door (known as an inner door and an outer door), by connecting the screen door 1 to the doorway frame 4 to prevent the screen door 1 from moving on its own.

[0017] The basic overall structure of the screen door 1 and the door frame 4 is well known, so we will not show them in their entirety and will only provide an outline here. The door frame 4 is a fixture installed at the windows, service entrances, and other entrances of a building, and is made up of an upper frame, a lower frame, and left and right vertical frames connected in a square shape, and the upper and lower frames include multiple running rails for allowing the sliding door and screen door to run in the left and right direction. The screen door 1 is made up of an upper frame, a lower frame, and left and right vertical frames connected in a square shape, and the screen is held by these frames.

[0018] For the screen door 1, Figs. 1 to 3 only show the vicinity of the locking mechanism 3 of one of the left and right vertical frames 2, and for the door frame 4, Figs. 1 and 2 only show the vicinity of the receiving member 5 of one of the left and right vertical frames. The up-down direction in Figs. 1 and 2 corresponds to the up-down direction of the vertical frame 2, which is perpendicular to the horizontal left-right direction in terms of design. Fig. 3 shows a cross section taken along line III-III in Fig. 1.

[0019] The direction in which screen door 1 runs to close it is either left or right, and hereinafter this direction will be referred to as the "door closing direction." The direction in which screen door 1 runs to open it is the other left or right, and hereinafter this direction will be referred to as the "door opening direction."

[0020] Additionally, the direction along the depth of the vertical frame 2 of the screen door 1 is the projection direction of the vertical frame 2. The projection direction of the vertical frame 2 corresponds to the direction perpendicular to the up-down and left-right directions of the vertical frame 2. Additionally, the direction perpendicular to the projection direction of the vertical frame 2 refers to the direction along a vertical plane perpendicular to the projection direction of the vertical frame 2, and is a concept that encompasses the up-down and left-right directions of the vertical frame 2. Below, the direction perpendicular to the projection direction of the vertical frame 2 is referred to as the "vertical plane direction," and the up-down, left-right, and projection directions of the vertical frame 2 are simply referred to as the "up-down direction," "left-right direction," and "projection direction," respectively, to correspond to each other.

[0021] The vertical frame 2 is made of an extruded aluminum material extending in the vertical direction. As shown in Fig. 3, the vertical frame 2 has a pipe section 6 consisting of four walls with a generally rectangular cross section, fin sections 7 and 8 protruding to the left and right from the indoor and outdoor sides of the pipe section 6, and a fin section 9 protruding from the indoor side of the pipe section 6 in the door opening direction. When the screen door 1 is closed and the self-propelled prevention device is connected to the door frame 4, the fin sections 7 and 8 face the outdoor side of the door frame 4 in the forward direction. The fin section 9 serves as a hook for stretching a screen (not shown) via a packing (not shown).

[0022] As shown in Figures 1 to 3, the locking device 3 has a case 10 attached to the vertical frame 2, a sickle 11 held in the case 10, a spring 12 interposed between the case 10 and the sickle 11, a first operating piece 13 arranged on the indoor side of the vertical frame 2, and a second operating piece 14 arranged on the indoor side of the vertical frame 2.

[0023] The case 10 has a structure in which two resin case halves are assembled into a box shape aligned in the projection direction in order to accommodate most of the sickle 11 and the spring 12 therein.

[0024] The sickle 11 comprises a hook portion 15 protruding from the case 10 in the door closing direction, and a base portion 16 housed inside the case 10.

[0025] The case 10 is attached to the inside of the vertical frame 2 so that the locking device 3 is less noticeable in the appearance of the vertical frame 2. Here, the inside of the vertical frame 2 refers to the part located between the vertical frame surface part when the vertical frame 2 is viewed from the inside of the room in the forward direction and the vertical frame surface part when the vertical frame 2 is viewed from the outside of the room in the forward direction. On the outside of the case 10, a clamping part 17 and a fastening part 18 are provided for fixing the case 10 to the pipe part 6 of the vertical frame 2. A storage opening 19 for inserting the case 10 into the inside of the pipe part 6 is formed in the forward wall of the pipe part 6 on the door closing direction side. This forward wall is aligned along the forward direction and the up-down direction. The case 10 is inserted into the internal space of the pipe part 6 through the storage opening 19 from the fastening part 18 side, the forward wall of the pipe part 6 is inserted into the clamping part 17, and the fastening part 18 and the forward wall of the pipe part 6 are screwed together, so that the case 10 is attached to the inside of the vertical frame 2. Most of the case 10 is located inside the pipe section 6, and the remainder of the case 10 is located between the fin section 7 on the indoor side and the fin section 8 on the outdoor side. Therefore, even when the vertical frame 2 is viewed from either the indoor side or the outdoor side, the case 10 is not exposed, and the design of the vertical frame 2 is not impaired.

[0026] Hook portion 15 of sickle 11 consists of an extension portion extending in the door closing direction and a tip portion protruding vertically from this extension portion, and the end face of this tip portion in the door opening direction includes a hooking surface 20 for engaging with receiving member 5 to prevent sickle 11 from moving in the door opening direction, and the end face of the tip portion in the door closing direction includes a slope 21 for generating a vertical component force in a direction that pushes sickle 11 away from receiving member 5 when it abuts against receiving member 5 in the door closing direction.

[0027] The base plate portion 16 extends in the vertical direction from the extension of the hook portion 15. The base plate portion 16 is formed of a single metal plate. As the metal plate, for example, a thin plate or the like having a thickness of less than 3 mm can be used.

[0028] Hook portion 15 may be formed of a metal plate that is continuous with base portion 16, or may have a structure in which the metal plate is covered with a resin member. The purpose of covering with a resin member is to improve the sliding properties of inclined surface 21 that becomes the contact portion with receiving member 5. Therefore, when covering with a resin member, it is sufficient to cover the metal plate with the resin member including inclined surface 21, and it is not necessary to cover the extension portion of hook portion 15.

[0029] A space is formed inside case 10 for moving base plate 16 of sickle 11 in the up-down direction. On the inside of case 10, there are provided guide wall surface 22 that guides base plate 16 in the up-down direction and positions it in the left-right direction, upper restricting wall surface 23 that restricts the upward movement of base plate 16, and lower restricting wall surface 24 that restricts the downward movement of base plate 16. Case 10 holds sickle 11 by these walls 22-24 so that it can move up and down.

[0030] Spring 12 is a torsion coil spring. One end of spring 12 is held by case 10, and the other end of spring 12 is held by sickle 11. One end of spring 12 can rotate around an axis of case 10, and the other end of spring 12 can move up and down integrally with sickle 11.

[0031] More specifically, as shown in FIG. 1, both ends of the spring 12 are wound in a circle. Inside the case 10, a round shaft portion 25 is provided along the axis in the forward direction. The base plate portion 16 of the sickle 11 is provided with a spring attachment portion 26 protruding in the forward direction. One end of the spring 12 is passed through the round shaft portion 25. The other end of the spring 12 is passed through the spring attachment portion 26. The vertical movement of the sickle 11 is transmitted to the other end of the spring 12 by the vertical engagement between the spring attachment portion 26 and the other end of the spring 12. At this time, the one end of the spring 12 slides around the round shaft portion 25 relative to the case 10, causing the spring 12 to rotate around the round shaft portion 25. The direction and amount of rotation of the spring 12 change according to the direction and amount of vertical movement of the sickle 11.

[0032] Sickle 11 is arranged to be movable up and down between a locked position where it can be engaged with receiving member 5 in the door-opening direction and an unlocked position where it cannot be engaged with receiving member 5 in the door-opening direction. In Figs. 1 to 3, sickle 11 is in the locked position.

[0033] The receiving member 5 has an attachment plate portion 27 that is fastened to the vertical frame of the doorway frame 4, and a locking plate portion 28 that is bent into a U-shape in cross section. A slit portion 29 is provided downward from the locking plate portion 28 to allow the sickle 11 to move up and down below the locking plate portion 28. Below the slit portion 29, a lower end portion that is U-shaped in cross section like the locking plate portion 28 is provided to reliably maintain the width of the slit portion 29 in the projection direction.

[0034] 1, when sickle 11 is in the locked position, engaging surface 20 and inclined surface 21 of hook portion 15 are at a height that laterally faces locking plate portion 28 of receiving member 5. In the locked position, sickle 11 can descend by stroke L1 until it abuts against lower regulating wall surface 24 of case 10. Sickle 11 is held in the locked position by being suspended by spring 12.

[0035] When the user closes the screen door 1, as shown by the solid line in Fig. 4, the inclined surface 21 abuts against the locking plate portion 28 in the door closing direction, generating a downward component force, and the sickle 11 is pushed downward against the spring 12 (see Fig. 1). Then, when the sickle 11 descends by the stroke L2 shown in Fig. 4 from the height of the locked position, the inclined surface 21 passes the locking plate portion 28 in the door closing direction, and the lower edge of the locking plate portion 28 reaches the top of the hook portion 15, as shown by the two-dot chain line in Fig. 4, and the hook surface 20 and the inclined surface 21 are at a height where they do not face the locking plate portion 28 in the left-right direction, so that the sickle 11 is in the unlocked position. When the top of the hook portion 15 passes the lower edge of the locking plate portion 28 in the door closing direction, the urging force of the spring 12 shown in Fig. 1 pulls the sickle 11 upward, and the sickle 11 is in the locked position. This results in a locked state in which hook surface 20 of sickle 11 can be engaged with locking plate portion 28 of receiving member 5 in the door-opening direction. In this locked state, if screen door 1 attempts to move on its own in the door-opening direction, hook surface 20 engages with locking plate portion 28, preventing screen door 1 from moving on its own.

[0036] In order to prevent excessive contact between base plate portion 16 of sickle 11 and lower regulating wall surface 24, stroke L1 in FIG. 1 is set to be greater than stroke L2 in FIG.

[0037] The first operating piece 13 on the indoor side and the second operating piece 14 on the outdoor side shown in FIG. 2 are movable parts for performing an unlocking operation to push down the sickle 11 from the locked position to the unlocked position. The indoor and outdoor walls of the vertical frame 2 are provided with long holes 32, 33 for fitting the recessed covers 30, 31, respectively. These walls on both the indoor and outdoor sides are aligned along the vertical plane. These long holes 32, 33 penetrate the corresponding walls in the forward direction. The indoor long hole 32 and the outdoor long hole 33 are provided at positions offset from each other in the vertical plane. In this embodiment, the offset direction is set to the up-down direction. The long holes 32, 33 have the same hole shape.

[0038] 2 and 5, the recessed cover 30 on the indoor side has a plurality of claws 35 on the outside of a recessed portion 34 that fits into the long hole 32 on the indoor side. These claws 35 are pressed into the hole edge of the long hole 32 in the forward direction and hooked onto the indoor wall of the vertical frame 2, whereby the recessed cover 30 is attached to the indoor side of the vertical frame 2.

[0039] The recessed portion 34 of the recessed cover 30 on the indoor side has a recessed bottom wall along the vertical direction, and is provided with an insertion opening 36 that penetrates the recessed bottom wall in the forward direction.

[0040] 2, 5, and 6, the first operating piece 13 on the indoor side has an operating plate portion 37 that fits inside the recessed portion 34 so as to cover and conceal the insertion opening 36 of the indoor side recessed cover 30, and an insertion portion 38 that is inserted into the inside of the vertical frame 2 from the insertion opening 36. The insertion portion 38 is made up of a pair of legs that face each other in the left-right direction, and a claw portion 39 that engages with the recessed portion 34 of the indoor side recessed cover 30 in the forward direction is provided on the end face on the opposite side of each leg. The first operating piece 13 is connected to the indoor side recessed cover 30 so as to be slidable in the up-down direction by the engagement of the recessed portion 34 and the operating plate portion 37 in the left-right direction and the forward direction, and by the engagement of the recessed portion 34 and the pair of claw portions 39 in the forward direction.

[0041] The exterior recessed cover 31 is provided with the same specifications as the interior recessed cover 30. The exterior second operating piece 14 is provided with the same specifications as the interior first operating piece 13. Here, specifications refer to the specific shape, structure, dimensions, and precision required of a component, and identical specifications refer to the matching of specifications when two corresponding components (first operating piece 13 and second operating piece 14, recessed cover 30 and recessed cover 31) are compared. For this reason, two components with identical specifications (first operating piece 13 and second operating piece 14, recessed cover 30 and recessed cover 31) can be obtained by simply preparing two of the same type of product and attaching them with the projection directions opposite to each other on the interior and exterior sides. Therefore, detailed explanation of the second operating piece 14 on the outdoor side and the recessed cover 31 will be omitted, but the outdoor side recessed cover 31 has an insertion opening 40 similar to the indoor side recessed cover 30, and the second operating piece 14 has an operating plate portion 41 and an insertion portion 42 similar to the first operating piece 13, and is connected to the outdoor side recessed cover 31 so as to be slidable in the vertical direction.

[0042] 1 to 3, the case 10 is provided with a through hole 43 facing the insertion hole 36 of the recessed cover 30 on the indoor side in the forward direction, and a through hole 44 facing the insertion hole 40 of the recessed cover 31 on the outdoor side in the forward direction. These through holes 43, 44 are for constantly communicating the corresponding insertion holes 36, 40 with the inside of the case 10 in the forward direction.

[0043] Base plate portion 16 of sickle 11 includes a first engagement portion 45 that engages with insertion portion 38 of first operating piece 13, and a second engagement portion 46 that engages with insertion portion 42 of second operating piece 14. These engagement portions 45, 46 are provided at positions offset from each other in the vertical plane. In this embodiment, the offset direction is set to the up-down direction.

[0044] The first and second engaging portions 45, 46 are elongated holes that extend through the base plate 16 in the forward direction and are long in the vertical direction and short in the horizontal direction. The first and second engaging portions 45, 46 have the same hole shape, and their major axes are aligned in a straight line.

[0045] The insertion portion 38 of the first operating piece 13 connected to the indoor-side recessed cover 30 is inserted into the indoor-side through-hole 43 of the case 10 by fitting the indoor-side recessed cover 30 into the long hole 32 of the vertical frame 2, and is further inserted into the first engagement portion 45 of the sickle 11, and is arranged in a state where it can engage with the first engagement portion 45 in the vertical direction. The insertion portion 42 of the second operating piece 14 connected to the outdoor-side recessed cover 31 is inserted into the outdoor-side through-hole 44 of the case 10 by fitting the outdoor-side recessed cover 31 into the long hole 33 of the vertical frame 2, and is further inserted into the second engagement portion 46 of the sickle 11, and is arranged in a state where it can engage with the second engagement portion 46 in the vertical direction.

[0046] Here, the vertical height H of the insertion portion 38 of the first operating piece 13 1 is the vertical height H of the first engagement portion 45 2 It is set smaller than H 2 and H 1 Difference ΔH 1 (=H 2 -H 1 4. The vertical height H of the insertion portion 42 of the second operating piece 14 shown in FIG. 3 is the vertical height H of the second engagement portion 46 4 It is set smaller than H 4 and H 3 Difference ΔH 2 (=H 4 -H3 ) is set to be larger than the stroke L2 in FIG. 4. As a result, even if one of the first operating piece 13 and the second operating piece 14 is slid by hand to operate the sickle 11, the other operating piece can be kept independently stationary. Therefore, even if, for example, there is an increase in the coefficient of friction between the second operating piece 14 on the exterior side and the cover 31, when the first operating piece 13 is slid from the interior side of the room, no bending moment is generated due to the frictional force of the second operating piece 14 on the exterior side, so that the first operating piece 13 can be slid with a light force even from the interior side of the room. In this embodiment, ΔH 1 >L2 and ΔH 2 >L2, but for example, only the outdoor side ΔH 2 >L2, and the indoor side is ΔH 1 =0 may also be used.

[0047] When sickle 11 is suspended in the locked position by spring 12 with respect to case 10 attached to vertical frame 2, first operating piece 13's insertion portion 38 or second operating piece 14's insertion portion 42 is supported from below by first engagement portion 45 or second engagement portion 46 on the corresponding side of sickle 11, so that first operating piece 13 and second operating piece 14 do not descend on their own. When a user performs an unlocking operation by sliding operation plate portion 37 of first operating piece 13 or operation plate portion 41 of second operating piece 14 downward, a downward operating force is transmitted from the corresponding insertion portion 38 or insertion portion 42 to the corresponding first engagement portion 45 or second engagement portion 46, and sickle 11 is pushed down to the unlocked position. When the user releases his / her finger from the first operating piece 13 or the second operating piece 14 that has performed the unlocking operation, the force of the spring 12 causes the sickle 11 to be raised to the locked position, and the first operating piece 13 or the second operating piece 14, which has been pushed upward from the first engagement portion 45 or the second engagement portion 46, is also raised together with the sickle 11.

[0048] As described above, the screen door self-propelling prevention device according to the first embodiment includes the locking mechanism 3 attached to the vertical frame 2 of the screen door 1, the receiving member 5 attached to the door frame 4, the sickle 11 arranged so as to be movable up and down between a locked position where the locking mechanism 3 can be engaged with the receiving member 5 and an unlocked position where the locking mechanism 3 cannot be engaged with the receiving member 5, a first operating piece 13 arranged on the indoor side of the vertical frame 2, a second operating piece 14 arranged on the outdoor side of the vertical frame 2, a case 10 attached to the inside of the vertical frame 2 and holding the sickle 11 so as to be movable up and down, and a spring 11 interposed between the sickle 11 and the case 10. 2, and after the sickle 11 is pushed from the locked position to the unlocked position by contact with the receiving member 5 when the screen door 1 is closed, it is returned to the locked position by the urging of the spring 12, and the first operating piece 13 and the second operating piece 14 each have insertion portions 38, 42 that transmit to the sickle 11 an unlocking operation to move the sickle 11 from the locked position to the unlocked position, and the sickle 11 has a first engagement portion 45 that engages with the insertion portion 38 of the first operating piece 13 and a second engagement portion 46 that engages with the insertion portion 42 of the second operating piece 14. As a result, when the user closes the screen door 1, when the sickle 11 in the locked position comes into contact with the receiving member 5 provided on the door frame 4, the sickle 11 is pushed against the spring 12 to the unlocked position, and then is returned to the locked position by the urging of the spring 12. When the sickle 11 is in the locked position, even if the screen door 1 tries to open due to wind force, the sickle 11 is engaged with the receiving member 5, so that the screen door 1 is prevented from moving on its own. When the user performs an unlocking operation on the first operating piece 13 on the indoor side or the second operating piece 14 on the outdoor side, the insertion portion 38 of the first operating piece 13 or the insertion portion 42 of the second operating piece 14 engages with the first engaging portion 45 or the second engaging portion 46 on the corresponding side of the sickle 11, so that the unlocking operation is transmitted, and the sickle 11 is moved to the unlocked position. When the sickle 11 is in the unlocked position, the sickle 11 is in a positional relationship with the receiving member 5 that does not allow it to be engaged, so that the screen door 1 can be opened. When the user stops the unlocking operation, the sickle 11 is returned to the locked position by the force of the spring 12. In this way, the screen door self-propelling prevention device according to the first embodiment can automatically lock the sickle 11 and the receiving member 5.

[0049] In addition, in the screen door self-propelled prevention device of the first embodiment, the sickle 11 is held in the case 10, and the case 10 is attached inside the vertical frame 2, so that it is not necessary to suspend the sickle 11 between the insertion portion 38 of the first operating piece 13 and the insertion portion 42 of the second operating piece 14.

[0050] Furthermore, in the first embodiment of the screen door self-propelling prevention device, the first engagement portion 45 and the second engagement portion 46 of the sickle 11 are arranged at positions that are offset from each other in a direction perpendicular to the projection direction of the vertical frame 2 (vertical plane direction), thereby eliminating the need to form a large opening that penetrates the sickle 11 in the projection direction, and the thickness of the sickle 11 can be made thinner in the projection direction to provide space in the projection direction between the vertical frame 2 and the sickle 11 inside the vertical frame 2.As a result, even if the vertical frame 2 is made thinner in the projection direction, it is possible to position the case 10 that holds the spring 12 and sickle 11 inside the vertical frame 2 to achieve automatic locking, and since it is no longer necessary to combine the insertion portions 38, 42 on both the indoor and outdoor sides in a male-female relationship, it also becomes possible to make the first operating piece 13 on the indoor side and the second operating piece 14 on the outdoor side the same specifications.

[0051] In this way, the screen door self-propelling prevention device of the first embodiment can automatically lock the sickle 11 and the receiving member 5 even if the projected width of the vertical frame 2 of the screen door 1 is made thin, and the first operating piece 13 on the indoor side and the second operating piece 14 on the outdoor side can be made to the same specifications.

[0052] In addition, in the screen door self-propelling prevention device according to the first embodiment, the vertical height H 1 is the vertical height H of the first engagement portion 45 2 and the vertical height H 3 The vertical height H of the second engagement portion 46 4Since the sickle 11 is operated by satisfying at least one of the settings smaller than the above, even if the operation piece 14 or 13 on the opposite side to the operation piece 13 or 14 satisfying the above-mentioned setting is slid by hand, the operation piece 13 or 14 on the setting satisfaction side can be kept independently stationary. Therefore, even if there is an increase in the friction coefficient between the operation piece 13 or 14 on the setting satisfaction side and the corresponding cover 30 or 31, when the operation piece 14 or 13 on the opposite side is slid, no bending moment is generated due to the friction force of the operation piece 13 or 14 on the setting satisfaction side, so that the operation piece 14 or 13 on the opposite side can be slid with a light force. In particular, since both of the above-mentioned two settings are satisfied in this embodiment, when either the first operation piece 13 on the indoor side or the second operation piece 14 on the outdoor side is slid, the second operation piece 14 on the outdoor side or the first operation piece 13 on the indoor side can be kept stationary.

[0053] In addition, in the screen door self-propelling prevention device of the first embodiment, the first engagement portion 45 and the second engagement portion 46 of the sickle 11 are arranged at positions offset from each other in the up-down direction of the vertical frame 2, so that the vertical length of the vertical frame 2 can be effectively utilized to position the first engagement portion 45 and the second engagement portion 46 offset from each other in the up-down direction, and expansion of the left-right width of the vertical frame 2 can be avoided compared to the case where the first engagement portion 45 and the second engagement portion 46 are offset from each other in the left-right direction.

[0054] Furthermore, in the screen door self-propelling prevention device of the first embodiment, since the first operating piece 13 and the second operating piece 14 are made to the same specifications, it is possible to reduce the number of types of parts that need to be prepared and thereby reduce manufacturing costs compared to when the first operating piece and the second operating piece are made to different specifications.

[0055] In the first embodiment, a screen door self-propelling prevention device for a two-panel sliding door in which the receiving member 5 is provided on the door frame 4 has been exemplified, but such a screen door self-propelling prevention device can also be applied to a four-panel sliding door. As an example, a second embodiment is shown in Fig. 7. Note that the following will only describe the differences from the first embodiment.

[0056] In the second embodiment, four sliding doors are constructed with two inner screens 51, 52 and two outer screens 53, 54, and two screens 55, 56 are installed on the outside of the two exterior screens 53, 54. The two screens 55, 56 have a palm-to-palm structure in which their vertical frames 57, 58 fit together. Of the two screens 55, 56, a locking mechanism 59 is provided on the vertical frame 57 of one screen 55, and a receiving member 60 is provided on the vertical frame 58 of the remaining screen 56.

[0057] The screen door self-propelling prevention device according to the first embodiment is configured as an automatic locking type, but it is also possible to configure it so that the manual locking type and the automatic locking type can be selected. As an example of this, a third embodiment is shown in Fig. 8.

[0058] A locking device 70 according to the third embodiment has a movable piece 72 that is held in a case 71 so as to be switchable between a first position and a second position. In Fig. 8, the movable piece 72 is depicted in a solid line when in the first position, and in a two-dot chain line when in the second position.

[0059] The movable piece 72 is attached to the case 71 so as to be rotatable around an axis in the projection direction. When the movable piece 72 is in the first position, the longitudinal direction of the movable piece 72 faces upward. At this time, the sickle 73 can be lowered by L1 from the lock position until it contacts the upper end surface 74 in the longitudinal direction of the movable piece 72. Therefore, the vertical stroke of the sickle 73 is restricted to the first stroke L1 by the movable piece 72, and the spring 12 can bias the sickle 73 from the unlocked position lowered to the first stroke L1 to the locked position, as in the first embodiment. Therefore, when the user closes the screen door, the sickle 73 is automatically locked to the receiving member in FIG. 1 and FIG. 7. In FIG. 8, the position near the hook portion when the sickle 73 is lowered by the first stroke L1 is depicted by a dashed line.

[0060] On the other hand, when movable piece 72 is in the second position, the longitudinal direction of movable piece 72 faces the left-right direction. Therefore, sickle 73 can descend by L3 from the locked position until it comes into contact with upper end surface 75 of movable piece 72 in the left-right direction in the short direction. Therefore, the vertical stroke of sickle 73 is restricted to second stroke L3 by movable piece 72, and is larger in the downward direction than first stroke L1. In FIG. 8, the position near the hook portion when sickle 73 descends by second stroke L3 is depicted by a two-dot chain line, and the position of spring 12 at this time is depicted by a two-dot chain line.

[0061] When the sickle 73 descends by L3 from the locked position, the spring 12 rotates leftward about the round shaft portion 25, and the spring 12 assumes a posture in which it urges the sickle 73 downward, i.e., in a direction from the locked position to the unlocked position. Therefore, when the movable piece 72 is in the second posture and the sickle 73 descends by the second stroke L3, the spring 12 does not return the sickle 73 to the locked position and keeps it in the unlocked position, resulting in a manual locking mode of use. In this manual locking mode of use, even if the user closes the screen door, the sickle 73 does not automatically engage with the receiving member in Figs. 1 and 7. After closing the screen door, the user performs a locking operation by sliding the first operating piece 13 or the second operating piece 14 upward, causing the sickle 73 to rise to the locked position and the spring 12 to rotate rightward about the round shaft portion 25, transitioning to a state in which the sickle 73 is held in the locked position. In addition, when the user opens the screen door, an unlocking operation is performed by sliding the first operating piece 13 or the second operating piece 14 downward, which causes the sickle 73 to descend to the second stroke L3 and the spring 12 to rotate left around the round shaft portion 25, transitioning to a state in which the sickle 73 is held in the unlocked position.

[0062] The structure for attaching the movable piece 72 to the case 71 is not particularly limited, and may be, for example, a structure in which the movable piece 72 is provided with a shaft portion in the projection direction, the shaft portion is fitted into a shaft hole provided in the case 71, and the shaft portion is retained by a retaining ring or the like to position the movable piece 72 in the projection direction. A click mechanism may be provided to provide resistance when the movable piece 72 moves between the first position and the second position. The case 71 is preferably provided with an auxiliary wall surface for keeping the movable piece 72 in the first position or the second position. In the illustrated example, an auxiliary wall surface 76 is provided that supports the left side of the movable piece 72 when the movable piece 72 is in the first position and supports the lower end surface of the movable piece 72 in the longitudinal direction along the left-right direction, and that supports the lower end surface of the movable piece 72 in the lateral direction along the left-right direction when the movable piece 72 is in the second position.

[0063] Furthermore, the task of switching movable piece 72 between the first position and the second position may be performed before case 71 is attached inside the vertical frame, or the user may be able to switch at will. As an embodiment that allows the user to switch at will, for example, a tool connection part corresponding to a + or - screwdriver for turning screws may be provided on the movable piece, and through holes for exposing the tool connection part may be provided on case 71 and the vertical frame.

[0064] In this way, the screen door self-propelling prevention device of the third embodiment has a locking mechanism 70 having a movable piece 72 held in a case 71 so as to be switchable between a first position and a second position, and is arranged so that when the movable piece 72 is in the first position, it restricts the up and down stroke of sickle 73 to a first stroke L1, and when the movable piece 72 is in the second position, it restricts the up and down stroke of sickle 73 to a second stroke L3.When the up and down stroke of sickle 73 is restricted to the first stroke L1, spring 12 urges sickle 73 to the locked position, and when the up and down stroke of sickle 73 is restricted to the second stroke L3 and sickle 73 is further pushed from the locked position beyond the unlocked position, spring 12 urges sickle 73 from the locked position to the unlocked position.Therefore, it can be provided as a screen door self-propelling prevention device that can be configured as either a manual locking type or an automatic locking type.

[0065] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. Therefore, the scope of the present invention is defined by the claims, and it is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0066] 1. Screen door 2, 57 Vertical frame 3, 59, 70 Lock Machine 4 Doorway Frame 5, 60 Receiving member 10, 71 cases 11, 73 Sickle 12 Spring 13 First operation piece 14 Second operation piece 38, 42 Insertion section 45 First engaging part 46 Second engaging part 58 Other screen door vertical frame 72 Movable Pieces

Claims

1. The device includes a lock mechanism that is attached to the vertical frame of the screen door, and a receiving member that is attached to the vertical frame of a door frame or another screen door; The locking device is a screen door self-propelling prevention device having a sickle arranged to be movable up and down between a locking position where the locking device can be engaged with the receiving member and an unlocked position where the locking device cannot be engaged with the receiving member, a first operating piece arranged on the indoor side of the vertical frame of the screen door, and a second operating piece arranged on the outdoor side of the vertical frame of the screen door, The locking mechanism includes a case that is attached to the inside of the vertical frame of the screen door and holds the sickle so that it can move up and down, and a spring that is interposed between the sickle and the case, The sickle is pushed from the lock position to the unlock position by contact with the receiving member when the screen door is closed, and is then returned to the lock position by the bias of the spring, the first operating piece and the second operating piece each have an insertion portion configured to transmit an unlocking operation to the sickle to move the sickle from the locked position to the unlocked position, The sickle has a first engagement portion that engages with the insertion portion of the first operating piece and a second engagement portion that engages with the insertion portion of the second operating piece, and the first engagement portion and the second engagement portion are positioned offset from each other in a direction perpendicular to the projecting direction of the vertical frame of the screen door, characterized in that the sickle has a first engagement portion that engages with the insertion portion of the first operating piece and a second engagement portion that engages with the insertion portion of the second operating piece, and the first engagement portion and the second engagement portion are positioned offset from each other in a direction perpendicular to the projecting direction of the vertical frame of the screen door.

2. A device for preventing a screen door from self-propelling as described in claim 1, which satisfies at least one of the following settings: the vertical height of the insertion portion of the first operating piece is smaller than the vertical height of the first engagement portion, and the vertical height of the insertion portion of the second operating piece is smaller than the vertical height of the second engagement portion.

3. The device for preventing a screen door from self-propelling according to claim 1 or 2, wherein the first operating piece and the second operating piece are provided to have the same specifications.

4. the locking device has a movable piece held in the case so as to be switchable between a first position and a second position, the movable piece is disposed to restrict a vertical stroke of the sickle to a first stroke when in the first position, and to restrict a vertical stroke of the sickle to a second stroke when in the second position, A device for preventing a screen door from self-propelling as described in any one of claims 1 to 3, wherein when the up and down stroke of the sickle is restricted to the first stroke, the spring urges the sickle toward the locked position, and when the up and down stroke of the sickle is restricted to the second stroke and the sickle is further pushed from the locked position beyond the unlocked position, the spring urges the sickle in a direction from the locked position toward the unlocked position.

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