Sliding window

Abstract

To provide a projecting window in which a link mechanism can be maintained in an appropriate attitude even when a large force acts on a sash.SOLUTION: A projecting window 10 has a slider rail 34, a slider 36 which slides while being guided by the slider rail 34, a link mechanism 38 which is partly pivotally supported by the slider 36 and performs a link operation with the sliding operation of the slider 36, and a sash 14 which is brought into sliding operation by the link mechanism 38. The link mechanism 38 includes a first link 44 pivotally supported by the slider 36 and the sash 14. The slider 36 includes a stopper projection 58 which comes into contact with a bulging portion 70 of the first link 44 when the sash 14 is in a fully opened state and limits the operation of the first link 44. The bulging portion 70 presses against the stopper projection 58 in a direction perpendicular to the sliding direction of the slider 36.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a sliding window in which a shoji screen performs a sliding-out operation by a link mechanism.

Background Art

[0002] A sliding window that performs a sliding-out operation of a shoji screen by a link mechanism is known. A part of the link constituting the link mechanism is pivotally supported by a slider guided by a slide rail. The link mechanism slides the shoji screen from the fully closed state to the fully open state based on the sliding operation of the slider. The slide rail is provided with a stopper that restricts the operation of the slider at the timing when the shoji screen reaches the fully open state (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when the shoji screen is in the fully open state, the slider abuts against the stopper and stops. However, when a force such as an unexpected strong wind acts on the shoji screen, an excessive force acts on the link mechanism due to inertia, and there is a concern that the link mechanism may be in a reverse joint state exceeding the specified operating angle depending on the joint part.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a sliding window capable of maintaining the link mechanism in an appropriate posture even when a large force acts on the shoji screen.

Means for Solving the Problems

[0006] To solve the above-mentioned problems and achieve the objective, the sliding window according to the present invention comprises a slider rail, a slider that slides guided by the slider rail, a link mechanism that is partially pivotally supported by the slider and performs a link operation in response to the sliding operation of the slider, and a sash that slides out by the link mechanism, wherein the link mechanism comprises a first link pivotally supported by the slider and the sash, and the slider is provided with a stopper projection that contacts a part of the first link when the sash is fully open to limit the operation of the first link. [Effects of the Invention]

[0007] In the sliding window according to the present invention, when the sash is fully open, the stopper projection contacts a part of the first link to restrict its movement, preventing the first link from rotating beyond a specified angle, and thus maintaining the link mechanism in the correct position. [Brief explanation of the drawing]

[0008] [Figure 1] This is a front view of a casement window according to an embodiment of the present invention, as seen from the interior side. [Figure 2] This is a vertical cross-section of a casement window. [Figure 3] This is a cross-sectional view of a sliding window. [Figure 4] This is a perspective view of the sliding mechanism when the shoji screen is fully closed. [Figure 5] This is a perspective view of the sliding mechanism of a shoji screen when it is fully open. [Figure 6] This is a side view of the sliding mechanism as seen from the longitudinal direction. [Figure 7] This is a perspective view of the slider. [Figure 8] This is a disassembled perspective view of the slider. [Figure 9] This is a perspective view of the slider and its surroundings with the shoji screen fully open. [Figure 10] This is a plan view of the slider and its surroundings with the shoji screen fully open. [Figure 11] This is a plan view showing a part of the link mechanism of a sliding window in a comparative example in a reverse-jointed state. [Modes for carrying out the invention]

[0009] The following describes in detail an embodiment of the sliding window according to the present invention, based on the drawings. However, this embodiment does not limit the present invention.

[0010] Figure 1 is a front view of a sliding window 10 according to an embodiment of the present invention, as seen from the interior side. Figure 2 is a vertical cross-sectional view of the sliding window 10. Figure 3 is a horizontal cross-sectional view of the sliding window 10. The sliding window 10 comprises a frame 12 and a sash 14 disposed inside the frame 12. The frame 12 is constructed by framing an upper frame 16, a lower frame 18, and a pair of left and right vertical frames 20 around its four sides. The sash 14 has a rectangular surface material 22 with an upper frame 24, a lower frame 26, and left and right vertical frames 28 attached to its four sides, and is configured to be sized so that the four exterior-facing surfaces can simultaneously contact the door stop portion of the frame 12. The upper frame 16, lower frame 18, left and right vertical frames 20, upper stile 24, lower stile 26, and left and right vertical frames 28 are extruded profiles formed from metal such as aluminum alloy, and are configured to have a substantially uniform cross-section along their entire length. The facing material 22 is, for example, composite glass.

[0011] In this application, "depth direction" refers to the direction between the interior and exterior of the room. "Depth surface" refers to the surface that extends along the depth direction. "Face direction" refers to the direction perpendicular to the depth direction; in the case of a vertical frame 20 that is long in the vertical direction, it refers to the left-right direction perpendicular to its longitudinal direction, and in the case of a top frame 16 that is long in the left-right direction, it refers to the up-down direction perpendicular to its longitudinal direction. "Face surface" refers to the surface that aligns with the face direction.

[0012] In the sliding window 10, a sliding mechanism 30 is provided between the lower frame 18 and the lower sill 26, and between the upper frame 16 and the upper sill 24 so that the shoji 14 slides out to the outdoor side. In the present embodiment, the sliding mechanism 30 is provided at a position closer to the right side in FIG. 1. A handle 32 is provided on the left side of the shoji 14 in FIG. 1. The handle 32 is used for opening and closing the shoji 14 and can be locked to the frame body 12 by turning it in the fully closed state. The sliding window 10 may have a structure symmetrical to the state shown in FIG. 1, that is, the sliding mechanism 30 may be provided on the left side and the handle 32 may be provided on the right side. The sliding window 10 may be either a friction type or a non-friction type. The sliding window 10 is a so-called vertical sliding window, but may also be a horizontal sliding window.

[0013] Next, the sliding mechanism 30 will be described. The upper and lower two sliding mechanisms 30 in the sliding window 10 have a symmetrical structure, but for convenience of explanation, the same reference numerals are attached, and hereinafter, the sliding mechanism 30 provided between the lower frame 18 and the lower sill 26 will be described.

[0014] FIG. 4 is a perspective view of the sliding mechanism 30 when the shoji 14 is in the fully closed state. FIG. 5 is a perspective view of the sliding mechanism 30 when the shoji 14 is in the fully open state. In FIG. 5, the schematic shoji 14 and the lower frame 18 are shown by phantom lines. FIG. 6 is a side view of the sliding mechanism 30 viewed from the longitudinal direction.

[0015] As shown in FIGS. 4, 5, and 6, the sliding mechanism 30 includes a slider rail 34, a slider 36 that is guided by the slider rail 34 and slides, and a link mechanism 38 that is partially pivotally supported by the slider 36. Here, the extending direction of the lower frame 18 and the slider rail 34 is defined as the X direction. The X direction is the sliding direction of the slider 36. Also, the direction in which the slider 36 moves when the shoji 14 opens is defined as the X1 direction, and the direction in which the slider 36 moves when the shoji 14 closes is defined as the X2 direction. The sliding mechanism 30 is basically composed of a metal material except for a cover 54 described later, but the material is not limited. For example, it may all be made of a metal material or all be made of a resin material.

[0016] The slider rail 34 is provided along the projected wall 18a on the inner peripheral side and the locating wall 18b on the indoor side of the lower frame 18. The slider rail 34 is an elongated member extending in the X direction, and has a bottom wall 34a, an indoor side wall (guide wall) 34b, and an outdoor side wall 34c. The bottom wall 34a is fixed to the projected wall 18a on the inner peripheral side by screws or the like. The indoor side wall 34b and the outdoor side wall 34c function as guide walls for the slider 36.

[0017] The indoor side wall 34b is a low wall erected upward from the indoor side edge of the bottom wall 34a and is provided over the entire length of the slider rail 34. The indoor side wall 34b is substantially in contact with the locating wall 18b on the indoor side. At the upper end of the indoor side wall 34b, a bent piece 34ba bent short toward the outdoor side is provided. The outdoor side wall 34c is a bent portion bent short obliquely upward from the outdoor side edge of the bottom wall 34a. The outdoor side end of the bottom wall 34a and the outdoor side wall 34c form a groove 39 having a substantially V-shaped arc at the deepest part (see FIG. 6). The bent piece 34ba and the outdoor side wall 34c are provided at least at a location including the movable range of the slider 36. A terminal 40 is provided at the end of the slider rail 34 in the X2 direction.

[0018] The slider 36 is guided by the slider rail 34 and is slidable from the end in the X2 direction to substantially the central portion. When the slider 36 is at the end in the X2 direction of the slider rail 34 (see FIG. 4), the shoji 14 is in the fully closed state. At this time, the link mechanism 38 is accommodated within the width range of the slider rail 34.

[0019] When the slider 36 is at substantially the central portion of the slider rail 34 (see FIG. 5), the shoji 14 is in the fully open state. In this embodiment, the fully open shoji 14 is in a direction perpendicular to the X direction, but depending on the design conditions, a different direction may be set as the fully open state. On the bottom wall 34a of the slider rail 34, a stopper 42 for restricting the operation of the slider 36 at the timing when the shoji 14 is in the fully open state is provided. The position of the slider 36 whose operation is restricted by the stopper 42 is called the stop position.

[0020] The link mechanism 38 slides the sliding screen 14 from a fully closed state to a fully open state based on the sliding motion of the slider 36, and has the strength to support the sliding screen 14. The link mechanism 38 has a first link 44, a second link 46, a third link 48, and a sliding screen link 50. The sliding screen link 50 is fixed to the lower corner of the lower frame 26 by screws or the like, and can be considered part of the sliding screen 14. For the first link 44, the second link 46, and the third link 48, the side pivotally supported by the slider 36 or slider rail 34 is the base end, and the opposite side is the tip.

[0021] The first link 44 is the shortest member of the link mechanism 38, with its first base shaft (first pivot) 44a pivotally supported by the slider 36 and its first tip shaft 44b pivotally supported by the end of the sash link 50. The first tip shaft 44b is located at the corner of the sash 14. The first link 44 rotates counterclockwise when the slider 36 slides in the X1 direction.

[0022] The second link 46 is about twice as long as the first link 44, with its second base shaft (second shaft support) 46a being supported by the slider 36, and its second tip shaft 46b being supported slightly towards the tip of the third link 48. The second link 46 rotates clockwise when the slider 36 slides in the X1 direction.

[0023] The third link 48 is about twice as long as the second link 46, with its third base shaft 48a pivotally supported near the X1 end of the slider rail 34, and its third tip shaft 48b pivotally supported on the sliding door link 50. The sliding door link 50 extends further than the location of the third tip shaft 48b and stably supports the sliding door 14. The third link 48 rotates counterclockwise when the slider 36 slides in the X1 direction. The second tip shaft 46b can also be called the intermediate shaft of the third link 48. Reinforcing press bars 48c are formed on the third link 48. The third link 48 is provided with a low step 48d corresponding to the height difference between the third base shaft 48a and the second tip shaft 46b.

[0024] The distance between the first end axis 44b and the third end axis 48b in the shoji link 50 is approximately equal to the length of the second link 46. Similarly, the distance between the second end axis 46b and the third end axis 48b in the third link 48 is approximately equal to the length of the first link 44. In other words, the area enclosed by the first link 44, the second link 46, the third link 48, and the shoji link 50 is roughly a parallelogram, and the angles of the interior angles are each 180 degrees or less.

[0025] Figure 7 is a perspective view of the slider 36. Figure 8 is an exploded perspective view of the slider 36. The slider 36 is composed of a metal base 52 and a resin cover 54. Using resin for the cover 54 improves sliding properties, but as mentioned above, the material is not limited. The base 52 has a symmetrical shape in the X direction and has a slightly elongated, narrow plate-shaped slide piece 56 and a stopper projection 58 in the X direction. The slide piece 56 is the part that contacts and slides against the bottom wall 34a of the slider rail 34. A pair of axial holes 56a, 56a in the slide piece 56 are formed side by side in the X direction, and a pair of positioning holes 56b, 56b are formed at symmetrical positions near the end. A cylindrical lower shaft member 60a is inserted into the axial hole 56a from below, and a cylindrical upper shaft member 60b is inserted into it from above. The lower shaft member 60a and the upper shaft member 60b fit together to form the axis 60. The axis 60 closer to X2 constitutes the first base axis 44a, and the axis 60 closer to X1 constitutes the second base axis 46a. The pair of axes 60 are located relatively close to each other.

[0026] A positioning pin 62 is inserted from below into the positioning hole 56b closer to X1. The positioning pin 62 protrudes slightly from the upper surface of the slide piece 56. The positioning pin 62 is provided with an auxiliary engaging portion 62a. The auxiliary engaging portion 62a is designed to engage with an engagement hole (not shown) formed on the lower surface of the slide piece 56.

[0027] Four engaging protrusions 64 are formed on the outdoor edge of the slide piece 56, and four engaging protrusions 66 are formed on the indoor edge. The two engaging protrusions 64 and 66 closer to the center are slightly larger, while the two closer to the ends are slightly smaller. On the outdoor lower surface of the cover 54, there are protrusions (not shown) that fit into three recesses formed between the engaging protrusions 64, and on the indoor lower surface, there are protrusions (not shown) that fit into three recesses formed between the engaging protrusions 66. These protrusions engage with the engaging protrusions 64 and 66 of the slide piece 56 in an alternating manner, fixing the slide piece 56 and the cover 54 together.

[0028] The stopper projection 58 is located at the center of the slide piece 56 and consists of a rectangular prism portion 58a and a trapezoidal column portion 58b. The stopper projection 58 is symmetrical in the X direction. The rectangular prism portion 58a is approximately square in plan view. The contact surface 58aa that constitutes the outdoor-facing surface of the rectangular prism portion 58a is located approximately in the center of the depth direction of the slider 36 and midway between the pair of axes 60. The indoor side of the rectangular prism portion 58a and the outdoor side of the trapezoidal column portion 58b are connected and form a single unit. The trapezoidal column portion 58b is a trapezoid that widens toward the indoor side in plan view. The outdoor side of the trapezoidal column portion 58b has the same area as the rectangular prism portion 58a, while the indoor side is approximately three times larger. The indoor sides of the trapezoidal column portion 58b and the slide piece 56 are on the same plane. A small projection 58c is provided on the upper surface of the indoor end of the stopper projection 58.

[0029] The cover 54 has an upper piece 54a, an indoor piece 54b, an outdoor piece 54c, and a cage 68. The upper piece 54a is a plate that covers the upper surface of the slide piece 56. The indoor piece 54b is a portion that protrudes slightly downward from the indoor edge of the upper piece 54a. The outdoor piece 54c is a portion that protrudes diagonally downward from the lower surface near the outdoor edge of the upper piece 54a. In a side view, the outdoor piece 54c tapers towards the tip, and the very tip is arc-shaped. The outdoor edge portion of the upper piece 54a is slightly thicker towards the outdoor side (see Figure 6). The outdoor piece 54c fits into the groove 39 (see Figure 6).

[0030] A pair of shaft holes 54aa are formed in the upper piece 54a. The shaft holes 54aa are located at a position corresponding to the shaft hole 56a, and the upper shaft member 60b is inserted from above. A positioning hole 54ab is formed near the X1 side end of the upper piece 54a. The positioning hole 54ab is located at a position corresponding to the X1-side of the pair of positioning holes 56b, and the base 52 and cover 54 are positioned by inserting a positioning pin 62 from below. Depending on the design conditions, the positioning hole 54ab may be formed at a position corresponding to the X2-side of the pair of positioning holes 56b, and positioning may be performed by the positioning pin 62 in this area.

[0031] A stopper hole 54ac is formed in the upper piece 54a. The stopper hole 54ac is a hole into which the stopper projection 58 fits, and has a composite shape of a rectangle and a trapezoid to match the plan view shape of the stopper projection 58. The stopper hole 54ac has a positioning function when the stopper projection 58 fits into it.

[0032] The cage 68 protrudes upward from the upper piece 54a and has a top plate 68a that covers the upper surface of the trapezoidal column portion 58b, an interior plate 68b that covers the interior side surface, and a side plate 68c that covers part of both sides in the X direction. A bottomed hole (not shown) into which the projection 58c fits is formed on the underside of the top plate 68a. The rectangular column portion 58a protrudes outward from an opening 68d formed on the exterior side of the cage 68. The interior side surfaces of the interior plate 68b and the interior piece 54b are on the same plane. The cage 68 abuts against the trapezoidal column portion 58b with almost no gap and is essentially considered to be part of the stopper projection 58.

[0033] As shown in Figure 6, the slider 36 has a vertical positioning and anti-detachment function because the lower surface of the base 52 abuts against the bottom wall 34a of the slider rail 34, and the upper surface of the stopper projection 58 (including the cage 68) abuts against the lower surface of the bent piece 34ba. In addition, the upper surface of the stopper projection 58 abuts against the lower surface of the bent piece 34ba, which allows it to receive the rotational moment acting on the link mechanism 38 due to the weight of the sliding door 14 and support the sliding door 14.

[0034] The slider 36 has a positioning and anti-dislodgement function in the depth direction because the stopper projection 58 (including the cage 68) and the indoor-side facing surface of the cover 54 abut against the outdoor-side facing surface of the indoor-side wall 34b, and the outdoor-side piece 54c fits snugly into the groove 39. There is a vertical positioning function between the outdoor-side piece 54c and the groove 39. In addition, the outdoor-side edge portion of the upper piece 54a is slightly thicker toward the outdoor side, and it clamps the outdoor-side wall 34c between itself and the outdoor-side piece 54c, further stabilizing the slider 36. In this way, the slider 36 abuts against the slider rail 34 with almost no gap, enabling stable sliding operation.

[0035] Figure 9 is a perspective view of the slider 36 and its surroundings with the shoji screen 14 in the fully open position. Figure 10 is a plan view of the slider 36 and its surroundings with the shoji screen 14 in the fully open position. The first link 44 has a bulge 70 that protrudes laterally near the first base end shaft 44a. The bulge 70 has a base 70a that extends along the longitudinal direction of the first link 44 and a contact projection 70b that protrudes from the base 70a.

[0036] An inclined surface 70aa is formed on the opposite side of the contact projection 70b at the base 70a. This inclined surface 70aa ensures that the bulging portion 70 fits within the width range of the slider rail 34 when the sliding door 14 is fully open. Furthermore, the bulging portion 70 fits within the width range of the slider rail 34 when the sliding door 14 is fully closed (see Figure 4).

[0037] The contact projection 70b has a flat portion 70ba and an arcuate portion 70bb. The flat portion 70ba is a surface that aligns with the X direction when the slider 36 is in the stop position. The arcuate portion 70bb is a small arc shape that connects the flat portion 70ba and the side surface of the base portion 70a.

[0038] When the slider 36 reaches the stop position, the flat portion 70ba presses against the contact surface 58aa of the stopper projection 58 in the direction of projection (a direction perpendicular to the sliding direction of the slider 36), as shown by the arrow in Figure 10. The flat portion 70ba makes surface contact with the contact surface 58aa. The bulging portion 70 receives a reaction force from the stopper projection 58, but since the base portion 70a extends in the direction of the reaction force, it has sufficient strength and does not break.

[0039] Furthermore, when the slider 36 reaches the stop position, the arcuate surface portion 70bb comes into contact with the side surface 46c of the second link 46. Because the arcuate surface portion 70bb is arcuate in shape, it comes into contact with the side surface 46c in a sliding manner. The contact of the flat portion 70ba with the contact surface 58aa and the contact of the arcuate surface portion 70bb with the side surface 46c basically occur at the same time, but may be slightly offset depending on the conditions.

[0040] Incidentally, because the slider 36 is restricted in its movement by the stopper 42 of the slider rail 34, the link mechanism 38 is also mechanically restricted from moving any further. However, when the shoji screen 14 is subjected to unexpected strong winds or other forces, even if the slider 36 stops, the inertia of the shoji screen 14 increases its momentum and causes it to flap, resulting in excessive force acting on the link mechanism 38. In such a case, the first link 44, which is easily affected by the movement of the shoji screen 14, will be subjected to a force that causes it to rotate beyond the specified angle, and there is a concern that the angle θ between the first link 44 and the shoji screen link 50 will exceed 180 degrees, resulting in a reverse joint state as shown in Figure 11. This tendency is more pronounced when the weight of the shoji screen 14 is large.

[0041] In contrast, in the sliding window 10 according to this embodiment, when the sash 14 is fully open, the stopper projection 58 contacts the bulging portion 70 of the first link 44 to restrict its movement. As a result, the first link 44 does not rotate beyond a specified angle, and the link mechanism 38 can be maintained in the correct position.

[0042] Furthermore, since the bulging portion 70 presses against the stopper projection 58 in the forward direction, no force acts on the slider 36 in the sliding direction. As a result, the slider 36 is reliably stopped by the stopper 42 alone and does not move any further in the X1 direction, thus maintaining the sliding door 14 in a fully open state.

[0043] The first base shaft 44a of the first link 44 and the second base shaft 46a of the second link 46 are not coaxial but are aligned in the sliding direction of the slider 36, thus keeping their height low. Furthermore, the first base shaft 44a and the second base shaft 46a are close together and function almost the same as in a coaxial configuration. The contact surface 58aa of the stopper projection 58 is positioned in the narrow gap between the first base shaft 44a and the second base shaft 46a, making effective use of the space and providing a suitable contact point for the bulging portion 70.

[0044] The stopper projection 58 can properly stop the first link 44 because its contact surface 58aa makes surface contact with the flat portion 70ba of the bulging portion 70. Furthermore, the first link 44 is stopped even more reliably because the arcuate surface portion 70bb of the bulging portion 70 comes into contact with the side surface 46c of the second link 46. The arcuate surface portion 70bb is designed to come into contact with the side surface 46c in a sliding manner, allowing for some movement. Therefore, neither the flat portion 70ba nor the arcuate surface portion 70bb is restricted in its movement alone; rather, both come into contact with the movement restriction surfaces and work together to stop the first link 44.

[0045] Since the stopper projection 58 is provided to slide against the indoor wall 34b, the pressing force from the bulging portion 70 is received by the stopper projection 58 and also received by the indoor wall 34b via the stopper projection 58. The indoor wall 34b has a moderately large surface area, so the force received from the stopper projection 58 is distributed. Therefore, the stopper projection 58 is not damaged and the bulging portion 70 can be received more reliably. In addition, the indoor wall 34b is in substantial contact with the indoor surface wall 18b (see Figure 5) of the lower frame 18, and the pressing force from the bulging portion 70 is received by the indoor surface wall 18b via the stopper projection 58 and the indoor wall 34b.

[0046] The stopper projection 58 has a shape in which the trapezoidal column portion 58b widens in the direction of pressure by the first link 44 (i.e., the depth direction), which provides high strength and allows it to contact the interior wall 34b over a wide area, thus more reliably receiving the bulging portion 70. In addition, the trapezoidal column portion 58b has a rational shape that fills the gap on the interior side between the first base shaft 44a and the second base shaft 46a.

[0047] The present invention is not limited to the embodiments described above, and can be freely modified without departing from the spirit of the invention.

[0048] The sliding window according to the present invention comprises a slider rail, a slider that slides guided by the slider rail, a link mechanism that is partially pivotally supported by the slider and performs a link operation in response to the sliding operation of the slider, and a sash that slides out by the link mechanism, wherein the link mechanism comprises a first link pivotally supported by the slider and the sash, and the slider comprises a stopper projection that contacts a part of the first link when the sash is fully open to limit the operation of the first link.

[0049] In this type of sliding window, when the sash is fully open, the stopper projection contacts a part of the first link to restrict its movement, preventing the first link from rotating beyond a specified angle and maintaining the link mechanism in the correct position.

[0050] The sliding window according to the present invention includes a bulge that protrudes laterally near the pivot point with the slider in the first link, and the bulge may contact the stopper projection in a direction perpendicular to the sliding direction of the slider when the sash is fully open. As a result, no force acts on the slider in the sliding direction, and the slider can be reliably stopped by the stopper alone and not slide any further, thus maintaining the sash in a fully open state.

[0051] The sliding window according to the present invention includes a link mechanism comprising a second link, one end of which is pivotally supported on the slider, and the bulging portion may come into contact with the bulging portion when the sash is fully open. The first link is stopped more reliably and maintained in the correct orientation when the bulging portion comes into contact with the second link.

[0052] In the sliding window according to the present invention, the first pivot point of the first link relative to the slider and the second pivot point of the second link relative to the slider are aligned in the sliding direction of the slider, and the contact surface of the stopper projection with respect to the bulge may be positioned between the first pivot point and the second pivot point. This allows for effective use of the space between the first pivot point and the second pivot point and is suitable as a contact point for the bulge.

[0053] The sliding window according to the present invention may have a bulging portion comprising a flat portion that abuts against the stopper projection and an arcuate portion that abuts against the second link. The arcuate portion can abut against the second link in a sliding manner and has some room for movement. Therefore, neither the flat portion nor the arcuate portion is restricted in its movement alone, and both can abut against the movement-restricting surface and cooperate to stop the first link.

[0054] The sliding window according to the present invention has a bulging portion comprising a base extending along the longitudinal direction of the first link and a contact projection protruding from the base, and the flat portion and the arcuate portion may be formed on the contact projection. Sufficient strength is obtained from the base of the bulging portion.

[0055] The sliding window according to the present invention may have a slider rail that includes a guide wall extending along the sliding direction of the slider, and the stopper projection may be provided to slide against the guide wall. In this configuration, the pressing force from a part of the first link is received by the stopper projection and also received by the guide wall via the stopper projection. Therefore, the stopper projection will not be damaged, and the first link can be received more reliably.

[0056] In the sliding window according to the present invention, the stopper projection may have a shape that widens in the direction of pressure applied by the first link. This increases the strength of the stopper projection and allows it to contact the guide wall over a wider area, thereby more reliably receiving the bulging portion. [Explanation of Symbols]

[0057] 10 Sliding window, 12 Frame, 14 Sash, 18 Bottom frame, 26 Bottom rail, 30 Sliding mechanism, 34 Slider rail, 34a Bottom wall, 34b Indoor wall, 34c Outdoor wall, 36 Slider, 38 Link mechanism, 42 Stopper, 44 First link, 44a First base shaft (first shaft support), 46 Second link, 46a Second base shaft (second shaft support), 46c Side, 48 Third link, 48a Third base shaft, 50 Sash link, 52 Base, 54 Cover, 56 Slide piece, 58 Stopper projection, 58a Rectangular column section, 58aa Contact surface, 58b Trapezoidal column section, 70 Bulging section, 70a Base section, 70b Contact projection, 70ba Flat section, 70bb Arc surface

Claims

1. Slider rail and A slider that slides guided by the aforementioned slider rail, A link mechanism, part of which is pivotally supported by the slider, performs a linkage operation in response to the sliding motion of the slider, A sliding screen that performs a sliding motion by the aforementioned link mechanism, A casement window having, The link mechanism comprises a first link pivotally supported by the slider and the sliding door. The slider is equipped with a stopper projection that contacts a part of the first link when the sliding door is fully open, thereby restricting the movement of the first link. The first link has a bulge that protrudes laterally near the pivot point with the slider, The bulging portion is positioned to press against the stopper projection in a direction perpendicular to the sliding direction of the slider when the sliding screen is fully open. A sliding window characterized by the following features.

2. The link mechanism comprises a second link, one end of which is pivotally supported by the slider. The bulging portion abuts against the second link when the sliding door is fully open. A sliding window according to feature 1.

3. The first pivot point of the first link relative to the slider and the second pivot point of the second link relative to the slider are aligned in the sliding direction of the slider. The contact surface of the stopper projection with respect to the bulging portion is located between the first and second axial supports. The sliding window according to feature 2.

4. The bulging portion comprises a flat surface portion that abuts against the stopper projection and an arcuate surface portion that abuts against the second link. The sliding window according to feature 2.

5. The bulging portion comprises a base extending along the longitudinal direction of the first link and a contact projection protruding from the base, The flat portion and the arcuate portion are formed on the contact projection. The sliding window according to feature 4.

6. The stopper projection has a shape that widens in the direction of pressure applied by the first link. A sliding window according to feature 1.

7. A slider rail and A slider that slides guided by the aforementioned slider rail, A link mechanism, part of which is pivotally supported by the slider, performs a linkage operation in response to the sliding motion of the slider, A sliding screen that performs a sliding motion by the aforementioned link mechanism, A casement window having, The link mechanism comprises a first link pivotally supported by the slider and the sliding door. The slider is equipped with a stopper projection that contacts a part of the first link when the sliding door is fully open, thereby restricting the movement of the first link. The slider rail includes a guide wall that extends along the sliding direction of the slider. The stopper projection is provided to slide against the guide wall. A sliding window characterized by the following features.

Images