Top-hung sliding door

Abstract

To provide a top-hung sliding door that can hold the door body in the open position. [Solution] In a sliding door in which the door body 40 is suspended from above so as to be slidable, a retaining member 50 is provided in a groove 411 along the X-axis direction at the lower part of the door body 40, which has elastically deformable parts 53A and 53B that can be elastically deformed in the Z-axis direction. The elastically deformable parts 53A and 53B have hooking parts 56 that protrude in the Z-axis direction so as to narrow the distance W3 between them to less than the width of the guide pin. A first widening part 561 is formed on the door-end side of the hooking part 56 to widen the distance W3 in the Z-axis direction, and a second widening part 562 is formed on the door-end side of the hooking part 56 to widen the distance W3 in the Z-axis direction. The hooking part 56 is positioned on the door-end side relative to the guide pin when the door body 40 is in the open position P1, and on the door-end side relative to the guide pin when the door body 40 is in the closed position P2.

Description

[Technical Field]

[0001] The present invention relates to a top-hung sliding door that opens and closes an opening in a building by means of a top-hung door body suspended from a rail. [Background Art]

[0002] Conventionally, a sliding door unit is known that includes an outer frame to which a rail is attached, and a top-hung sliding door (door body) that moves toward the door leading end side and the door trailing end side along the rail (see Patent Document 1). Wall boards are affixed to both sides of the outer frame, and the space surrounded by the outer frame and the wall boards serves as a door pocket for storing the sliding door, and the opening side within the outer frame where no door pocket is formed serves as an entrance / exit. The rail is attached along the upper horizontal frame that constitutes the upper part of the outer frame. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Laid-Open No. 2007-170083 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] Incidentally, in the sliding door unit described in Patent Document 1, if the rail is inclined obliquely downward from the door trailing end side toward the door leading end side due to, for example, construction errors or the installation condition of the sliding door unit, the door body suspended from the rail also inclines, and may slide toward the door leading end side under its own weight and come out of the door pocket. In such a case, it is difficult to hold the door body at the position where it is stored in the door pocket (the open position where the opening is opened).

[0005] An object of the present invention is to provide a top-hung sliding door capable of holding a door body at an open position. [Means for Solving the Problem]

[0006] The overhead sliding door of the present invention comprises a door body that is suspended so as to be slidable on the leading and trailing ends of a rail provided in an opening in a building, and whose swing in the depth direction is restricted by guide pins erected on the building side, and the door body is positioned in an open position in which the opening is opened by sliding movement and a closed position in which the opening is closed, wherein a groove portion for which the guide pins are arranged is formed in the lower part of the door body along the sliding direction of the door body, and an elastically deformable portion that can be elastically deformed in the depth direction is provided in the groove portion, and of the elastically deformable portion and the opposing portion that faces the elastically deformable portion in the depth direction At least one of the components has a hooking portion that protrudes in the depth direction such that the distance between the elastically deformable portion and the opposing portion is narrower than the width of the guide pin in the depth direction; a first widening portion is formed on the leading edge side of the hooking portion to widen the distance in the depth direction; and a second widening portion is formed on the trailing edge side of the hooking portion to widen the distance in the depth direction; the hooking portion is positioned on the trailing edge side of the guide pin when the door is in the open position, and on the leading edge side of the guide pin when the door is in the closed position. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a top-hung sliding door that can hold the door body in the open position. [Brief explanation of the drawing]

[0008] [Figure 1] A diagram showing the closed state of an overhead sliding door according to an embodiment of the present invention. [Figure 2] A plan view showing the door frame of the top-hung sliding door in Figure 1, viewed from above. [Figure 3] Figure 1 is a side view showing the door body of a top-hung sliding door from the door edge side. [Figure 4] An enlarged explanatory diagram showing a magnified view of the retaining member provided on the door body of the overhead sliding door in Figure 1. [Figure 5] An explanatory diagram showing the retaining member in Figure 4. [Figure 6]Figure 1 is an explanatory diagram showing the key parts of the sliding movement of the door body of a top-hung sliding door. [Modes for carrying out the invention]

[0009] [Structure of this embodiment] Embodiments of the present invention will be described below with reference to the drawings. In Figures 1 to 3, the single-sliding pocket door 1, which is an overhead-hung sliding door according to this embodiment, is an interior door installed inside a building that opens and closes an opening 2 inside the building. The pocket door 1 comprises a frame 30 having a rail 35 provided along the opening 2, and a door body 40 that is suspended from the rail 35 so as to be slidable on the leading and trailing ends, and whose swing in the depth direction is restricted by a guide pin 51 erected on the floor surface of the building. A pocket door 7 is formed on one half of the opening 2 in the sliding direction of the door body 40 by attaching a pair of wall boards 6 to the frame 30 from the outside and inside. In the following explanation, for the sake of clarity, the left-right direction of the sliding door 1 (the sliding direction of the door body 40) will be defined as the X-axis direction, the up-down direction of the sliding door 1 will be defined as the Y-axis direction, and the depth direction of the sliding door 1 will be defined as the Z-axis direction. The X, Y, and Z axes are orthogonal to each other.

[0010] The frame 30 comprises an upper frame 31 and left and right vertical frames 32 attached to the left and right ends of the upper frame 31, forming the opening edge of the opening 2. The rail 35 described above is provided on the upper frame 31 along the X-axis direction. The rail 35 is folded back so that it can receive the overhead suspension roller 421, which will be described later, so that it can travel along the X-axis direction.

[0011] The door body 40 comprises a rectangular plate-shaped door body 41 positioned in an open position P1 for opening the opening 2 and a closed position P2 for closing the opening 2; a running device 42 provided on the upper part of the door body 41 and on which the aforementioned overhead hanging door roller 421 is rotatably mounted; and a holding member 50 provided on the lower part of the door body 41 and for holding the door body 41 in the open position P1. A groove 411 is formed along the X-axis direction at the lower part of the door body 41, where the guide pin 51 is positioned. The groove 411 has a pair of side surfaces 412 and a bottom surface 413, and is open at both ends and downward in the X-axis direction (see Figure 4). The end of the groove 411 on the door-side is formed to be wide in the Z-axis direction and deep upward, corresponding to the outer shape of the aforementioned retaining member 50, and the retaining member 50 is positioned thereon. The guide pin 51 in this embodiment has a fixing part (not shown) that is fixed to the floor surface of the building, and a cylindrical shaft part that protrudes upward in the Y-axis direction from the fixing part. It is erected at approximately the center of the sliding door 1, and the shaft part is arranged so that it can pass through the groove 411 in the X-axis direction and slide against the side surface 412, thereby guiding the door body 41 in the X-axis direction and restricting the swinging of the door body 41 in the Z-axis direction. In this embodiment, the traveling device 42 is provided on the leading edge and trailing edge of the upper part of the door body 41.

[0012] In this embodiment, the retaining member 50 is made of synthetic resin and, in cooperation with the aforementioned guide pin, constitutes a retaining mechanism that holds the door body 40 in the open position P1. As shown in Figures 4 to 6, the retaining member 50 has a main body 52 that is screwed to the door body 41 at the door-side end of the groove 411, a pair of elastically deformable parts 53A, 53B that face each other in the Z-axis direction at the lower part of the main body 52, and a pair of groove-forming pieces 54, 54 that face each other in the Z-axis direction at the lower part of the main body 52, on the door-side side of the elastically deformable parts 53A, 53B. The pair of elastically deformable portions 53A, 53B and the pair of groove-forming portions 54, 54 are aligned along the X-axis direction and form passages 55 that open on the leading and trailing ends of the door, allowing the guide pin 51 to pass through relatively in the X-axis direction. For example, when the door body 40 is slid forcefully towards the trailing end to open the opening 2, the retaining member 50 will come into contact with the guide pin 51 in the X-axis direction in a portion excluding the hooking portion 56 described later, thereby suppressing the risk of damage to the retaining member 50. In this embodiment, the Z-axis spacing W1 between the parts of the pair of elastically deformable portions 53A and 53B excluding the hooking portion 56 described later, and the Z-axis spacing W2 between the pair of groove-forming pieces 54 and 54 are equal in size. The spacing dimensions W1 and W2 are greater than or equal to the diameter dimension D (width dimension) of the guide pin 51. In this embodiment, the spacing dimensions are set to be equal to or slightly larger than the diameter dimension D so that the guide pin 51 can smoothly pass through the parts of the pair of elastically deformable portions 53A and 53B excluding the hooking portion 56 described later, and the pair of groove-forming pieces 54 and 54 in the X-axis direction.

[0013] The elastic deformation portions 53A and 53B are provided symmetrically with respect to a virtual line along the X-axis direction. Elastic deformation portion 53A is an opposing portion to elastic deformation portion 53B in the Z-axis direction, and elastic deformation portion 53B is an opposing portion to elastic deformation portion 53A in the Z-axis direction. By configuring the elastic deformation portions 53A and 53B symmetrically in this way, the configuration of the holding member 50 can be simplified, and the versatility of the holding member 50 can be improved. Since the elastic deformation parts 53A and 53B are similarly configured and arranged opposite each other in the Z-axis direction, the elastic deformation part 53A will be described in detail below, and the configuration of the elastic deformation part 53B will be given the same reference numerals as the configuration of the elastic deformation part 53A, and its detailed description will be omitted. The elastically deformable portion 53A is formed of a leaf spring 530 that extends in the X-axis direction and is elastically deformable in the Z-axis direction. The base end 531 of the leaf spring 530 is continuously positioned on the door-side relative to the door body 41, and the tip 532 of the leaf spring 530 is positioned on the door-side relative to the base end 531. Except for the base end 531, the leaf spring 530 is positioned in a recess 415 formed in the lower part of the door body 41 and opening downwards, with a gap between the bottom surface 416 of the recess 415 and the side surface 412 of the groove 411. As a result, the elastically deformable portion 53A can be smoothly elastically deformed in the Z-axis direction. Furthermore, the leaf spring 530 is provided with tapered ribs 533, which increase the strength of the base end 531 and facilitate elastic deformation in the Z-axis direction at the tip end 532.

[0014] A hooking portion 56 protruding in the Z-axis direction is provided at a tip end portion 532 of a leaf spring 530 constituting one elastic deformable portion 53A. The hooking portion 56 protrudes toward the tip end portion 532 of the leaf spring 530 constituting the other elastic deformable portion 53B, which is a facing portion facing the leaf spring 530 in the Z-axis direction. Furthermore, a hooking portion 56 is also provided at a tip end portion 532 of the leaf spring 530 constituting the other elastic deformable portion 53B, and this hooking portion 56 protrudes toward the tip end portion 532 of the leaf spring 530 constituting the one elastic deformable portion 53A. An interval dimension W3 in the Z-axis direction between the hooking portions 56 of the elastic deformable portions 53A, 53B is smaller than the diameter dimension D of the guide pin 51, and is a dimension narrower than the aforementioned interval dimensions W1, W2. Since the hooking portions 56 are provided at the tip end portions 532 of the leaf springs 530 in this manner, the hooking portions 56 can be largely moved in the Z-axis direction by elastic deformation of the leaf springs 530, and the guide pin 51 can be more easily passed between the hooking portions 56.

[0015] The hook portion 56 is bent inward in the Z-axis direction towards the passage 55. A first widening portion 561 is formed on the door-side portion of the hook portion 56, which widens the spacing dimension W3 in the Z-axis direction. A second widening portion 562 is formed on the door-side portion of the hook portion 56, which widens the spacing dimension W3 in the Z-axis direction. The distance in the X-axis direction from the base end 531 of the leaf spring 530 to the first widening portion 561 is shorter than the distance from the base end 531 to the second widening portion 562. The dimension of the second widening portion 562 in the X-axis direction is longer than the dimension of the first widening portion 561 in the X-axis direction. Therefore, in order to move the first widening portion 561 in the Z-axis direction by the elastic deformation of the leaf spring 530, it is necessary to apply a force greater than the force required to elastically deform the leaf spring 530 in order to move the second widening portion 562 in the Z-axis direction. When the door 40 is slid from the open position P1 to the closed position P2 to close the opening 2, the first widening portion 561 is pressed against the guide pin 51 in the X-axis direction by this larger force, which can create a feeling of resistance (click) when the door 40 is slid from the open position P1 to the closed position P2 to close the opening 2. On the other hand, in order to move the second widening portion 562 in the Z-axis direction by the elastic deformation of the leaf spring 530, it is sufficient to apply a force smaller than the force required to elastically deform the leaf spring 530 in order to move the first widening portion 561 in the Z-axis direction. Therefore, the door 40 can be slid more smoothly from the closed position P2 to the open position P1 than when the door 40 is slid from the open position P1 to the closed position P2. The first widened portion 561 is inclined with respect to the X-axis direction such that the leading end side portion is located further outward in the Z-axis direction than the trailing end side portion as it goes toward the leading end side of the door. The second widened portion 562 is inclined with respect to the X-axis direction such that the trailing end side portion is directed further outward in the Z-axis direction than the leading end portion as it goes toward the trailing end side of the door. The inclination angle of the first widened portion 561 is larger than the inclination angle of the second widened portion 562. In this embodiment, the first widened portion 561 is formed in a convex curved surface toward the leading end side of the door and the inner side of the passage 55, and the second widened portion 562 is formed in a convex curved surface toward the trailing end side of the door and the inner side of the passage 55. The curvature of the first widened portion 561 is larger than the curvature of the second widened portion 562. The rate of change at which the spacing dimension W4 at the position corresponding to the first widened portion 561 changes along the X-axis direction is larger than the rate of change at which the spacing dimension W5 at the position corresponding to the second widened portion 562 changes along the X-axis direction. Therefore, during the sliding movement of the door body 40, most of the force that the first widened portion 561 collides against the guide pin 51 can be generated as a force at an angle that intersects the X-axis direction at a small angle, so that a sense of resistance (click feeling) can be produced along with the sliding movement of the door body 40 toward the leading end side. On the other hand, during the sliding movement of the door body 40, most of the force that the second widened portion 562 collides against the guide pin 51 can be generated as a force at an angle that intersects the X-axis direction at a large angle, so that the sliding movement of the door body 40 toward the trailing end side can be performed more smoothly than the sliding movement of the door body 40 toward the leading end side. In this hooking portion 56, the first widened portion 561 and the second widened portion 562 are formed as described above, so that the first resistance force generated when the first widened portion 561 abuts against the guide pin 51 during the sliding movement of the door body 40 toward the leading end side is set to be larger than the second resistance force generated when the second widened portion 562 abuts against the guide pin 51 during the sliding movement of the door body 40 toward the trailing end side.

[0016] It should be noted that the holding member 50 and the guide pin 51 described above constitute a holding mechanism that holds the door body 40 at the open position P1.

[0017] [Opening and Closing Operation of Recessed Door] In the recessed door 1 described above, the opening 2 is opened and closed in the following manner, and the door body 40 is held at the open position P1. (Opening operation) In a closed retractable door 1 where the door body 40 is in the closed position P2, when the door body 40 is moved in the X-axis direction toward the door tail, the door roller 421 of the running device 42 travels along the rail 35 toward the door tail in the X-axis direction, and the door body 41 slides toward the door tail in the X-axis direction. During this sliding movement, the second widening portion 562 contacts the guide pin 51, as shown in Figure 6(A). Subsequently, as the door body 41 slides toward the tail end, the second widening portion 562 presses against the guide pin 51, causing elastic deformation of the leaf spring 530 in the Z-axis direction, and the spacing dimension W3 is widened to approximately the same size as the diameter dimension D of the guide pin 51. Here, the inclination angle of the second widening portion 562 with respect to the X-axis direction is smaller than the inclination angle of the first widening portion 561 with respect to the X-axis direction, resulting in a second resistance force smaller than the first resistance force. Therefore, compared to when the door body 40 slides from the open position P1 toward the leading edge, the guide pin 51 can pass smoothly between the pair of hooking portions 56, and the guide pin 51 is positioned beyond the leading edge relative to the hooking portions 56. Each leaf spring 530 returns to its original shape after the guide pin 51 has passed between the pair of hooking portions 56. In this way, the door body 40 is smoothly slid from the closed position P2 to the open position P1, and the opening 2 is smoothly opened. In this embodiment, when the opening 2 is open, the door body 40 is positioned in the position shown by the dashed line in Figure 2 and is stored in the door pocket 7. (Maintaining the door frame) When the door body 40 is in the open position P1, even if the door body 40 attempts to move in the closed position due to its own weight caused by construction errors or the way the sliding door 1 is fitted, the hook portion 56 located on the tail end side of the guide pin 51 will catch on the guide pin 51 in the X-axis direction. Therefore, unless the door body 40 is moved in the closed position by operation, the door body 40 will be held in the open position P1 by the holding mechanism. (Closing action) In the open state of the retractable door 1, where the door body 40 is in the open position P1, when the door body 40 is moved in the X-axis direction toward the door edge, the door roller 421 travels along the rail 35 in the X-axis direction toward the door edge, and the door body 41 slides in the X-axis direction toward the door edge. At this time, the first widening portion 561 comes into contact with the guide pin 51, as shown in Figure 6(B), and subsequently, as the door body 41 slides toward the door edge, the second widening portion 562 comes into contact with the guide pin 51. Here, the inclination angle of the first widening portion 561 with respect to the X-axis direction is greater than the inclination angle of the second widening portion 562 with respect to the X-axis direction, and a first resistance force greater than the second resistance force is generated. Therefore, the door body 40, which is about to slide toward the door edge, gets stuck by this first resistance force, creating a feeling of resistance (click) for the operator of the door body 40. At this time, since the first widening portion 561 is formed in a convex curved shape as described above, the first resistance force gradually decreases as it moves from the initial contact position to the later contact position. Next, by sliding the door body 40 toward the door edge side, the leaf spring 530 undergoes elastic deformation, widening the spacing dimension W3 to approximately the same size as the diameter dimension D of the guide pin 51, and passing the guide pin 51 between the pair of hooking portions 56. The guide pin 51 is positioned beyond the door edge side relative to the hooking portion 56. Each leaf spring 530 returns to its original position after the guide pin 51 has passed between the pair of hooking portions 56. When the guide pin 51 passes through the second widening portions 562, the second widening portions 562 of the elastic deformation portions 53A and 53B move toward each other in the Z-axis direction to return to their original positions, while relatively pushing the guide pin 51 toward the door edge side. In this way, the door body 40 is slid from the open position P1 to the closed position P2, closing the opening 2. In this embodiment, when the opening 2 is closed, the door body 40 is positioned in the opening 2 as shown by the solid line in Figure 2. In addition, when the door body 40 is in the open position P1, the first widening portion 561 may be positioned to contact the guide pin 51.

[0018] With the sliding door 1 described above, when the opening 2 is open, the hooking portion 56 of the retaining member 50 is positioned closer to the door edge than the guide pin 51. For example, even if the rail 35 tilts diagonally downward from the door edge to the door edge due to construction errors or the way the sliding door 1 is installed, and the door body 40 tries to move towards the door edge due to its own weight, the hooking portion 56 will catch on the guide pin 51, thereby suppressing the movement of the door body 40 toward the door edge (closing movement) and holding the door body 40 in the open position P1. Furthermore, when sliding the door body 40 from the open position P1 to the closed position P2 to close the opening 2, the first widening portion 561 comes into contact with the guide pin 51, generating a first resistance force greater than the second resistance force, and creating a feeling of resistance (click) as the door body 40 slides toward the leading edge based on the first resistance force. On the other hand, when sliding the door body 40 from the closed position P2 to the open position P1 to open the opening 2, the second widening portion 562 comes into contact with the guide pin 51, suppressing the generation of a second resistance force smaller than the first resistance force, and allowing the door body 40 to slide toward the trailing edge more smoothly than it slides toward the leading edge. Furthermore, compared to using a complex mechanism such as a so-called soft closer to hold the door body 40 in the open position P1, the aforementioned holding member 50 allows for a simple and inexpensive configuration of the sliding door 1. In addition, since the retaining member 50 is provided on the door edge side of the door body 40, maintenance is easy.

[0019] [Differentiation] In the above embodiment, the holding member 50 has a pair of elastically deformable portions 53A and 53B, but is not limited to this. For example, it may have only one of the pair of elastically deformable portions 53A and 53B, and the other may have a side wall portion that faces the elastically deformable portion 53A in the Z-axis direction as an opposing portion. In the above embodiment, the pair of elastically deformable portions 53A and 53B are configured symmetrically, but the invention is not limited to this, and the elastically deformable portions 53A and 53B may be formed in different shapes from each other. In the above embodiment, the elastically deformable portions 53A and 53B are formed by a leaf spring 530 extending in the X-axis direction, but are not limited to this, and may be formed by, for example, an elastically deformable spring piece that is continuous with the main body 52 at its upper edge. In the above embodiment, the elastically deformable portions 53A and 53B are formed in a convex curved shape as described above, but are not limited to this, and may be formed as, for example, a flat inclined surface. In the above embodiment, the retaining member 50 is provided at the leading edge end of the groove 411 of the door body 41. However, it is not limited to this, and for example, if a door pocket 7 is not formed, the retaining member 50 may be provided at other parts of the groove 411, such as the tail end, excluding the leading edge end. In this case, the guide pin 51 is erected at a position corresponding to the position of the retaining member 50, such that it is positioned on the leading edge side of the hook 56 when the door is open. Additional guide pins 51 may be provided. In the above embodiment, the shaft portion of the guide pin 51 is cylindrical and has a circular cross-section, but it is not limited to this and may be formed in an elliptical shape, a polygonal shape such as a square cross-section, or a shape in which the corners of the polygon are curved and smoothed. In the above embodiment, a separate retaining member 50 is screwed to the door body 41 to form an elastically deformable portion 53A (53B) having a hook portion 56 on the door body 40. However, the invention is not limited to this, and for example, an elastically deformable portion 53A (53B) having a hook portion 56 may be formed on the door body 41 itself. In the above embodiment, a sliding door 1 was described as a top-hung sliding door, in which the top-hung door body 40 is stored in the door pocket 7 when the opening 2 is opened and the door body 40 is pulled out from the door pocket 7 when the opening 2 is closed. However, there are also other types of top-hung sliding doors in which at least one component of the wall board 6 is omitted to form a door pocket 7. Furthermore, a top-hung sliding door can be any type in which the door body 40 is suspended so as to be slidable. For example, it may be a single-sliding type as described above, or it may be a double-sliding type in which at least one pair of door bodies 40 abut against each other when closed.

[0020] [Summary of the invention] (1) The overhead sliding door of the present invention comprises a door body that is suspended so as to be slidable on the leading edge side and the trailing edge side with respect to a rail provided in an opening in a building, and whose swing in the depth direction is restricted by a guide pin erected on the building side, and the door body is positioned in an open position in which the opening is opened by sliding movement and in a closed position in which the opening is closed, wherein a groove portion for which the guide pin is arranged is formed in the lower part of the door body along the sliding direction of the door body, and an elastic deformation portion that can be elastically deformed in the depth direction is provided in the groove portion, and of the elastic deformation portion and the opposing portion that faces the elastic deformation portion in the depth direction At least one of the parts has a hooking portion that protrudes in the depth direction such that the distance between the elastically deformable portion and the opposing portion is narrower than the width of the guide pin in the depth direction; a first widening portion is formed on the leading edge side of the hooking portion to widen the distance in the depth direction; and a second widening portion is formed on the trailing edge side of the hooking portion to widen the distance in the depth direction; the hooking portion is positioned on the trailing edge side of the guide pin when the door is in the open position, and on the leading edge side of the guide pin when the door is in the closed position. According to the overhead sliding door of the present invention, when the door body is in the open position (opening), the hooking part is positioned on the door-end side of the guide pin. Therefore, even if, for example, the rail tilts diagonally downward from the door-end side to the door-front side due to construction errors or the way the sliding door unit is installed, and the door body tries to move towards the door-front side due to its own weight, the hooking part catches on the guide pin, thereby suppressing the movement of the door body towards the door-front side and holding the door body in the open position. Furthermore, since the hooking portion has a first widening portion and a second widening portion, when a sliding force greater than a predetermined amount is applied to the door body by operation and the door body slides toward the leading edge, a guide pin can be introduced from the first widening portion between the hooking portion and the opposing portion, allowing the guide pin to pass between the hooking portion and the opposing portion while causing elastic deformation in the elastic deformation portion. When the door body slides toward the trailing edge, a guide pin can be introduced from the second widening portion between the hooking portion and the opposing portion, allowing the guide pin to pass between the hooking portion and the opposing portion while causing elastic deformation in the elastic deformation portion. Furthermore, compared to using complex devices such as so-called soft closers to suppress sliding movement of the door towards the leading edge, which can be caused by construction errors or the way the sliding door unit is fitted, this method allows for the construction of a top-hung sliding door that can suppress the aforementioned sliding movement with a simple and inexpensive configuration. (2) In the overhead sliding door of the present invention, a retaining member having the elastically deformable portion and the opposing portion is attached to the groove portion, the elastically deformable portion is one elastically deformable portion, and the opposing portion is configured as the other elastically deformable portion that can be elastically deformed in the depth direction, and the one elastically deformable portion and the other elastically deformable portion may each be provided with the hooking portion facing the depth direction. With this configuration, the pair of elastically deformable parts can be configured symmetrically with respect to a virtual line along the sliding direction, thus simplifying the structure of the retaining member. Furthermore, the versatility of the retaining member can be improved. (3) In the overhead sliding door of the present invention, the elastic deformation portion is formed of a leaf spring having a tip portion and a base portion and extending in the sliding direction, and the hook portion may be disposed at the tip portion. With this configuration, the elastically deformable part can be made into a simple structure using a leaf spring, and since the hooking part is located at the tip of the leaf spring, the elastic deformation of the leaf spring can move the hooking part a large distance in the forward direction, making it easier for the guide pin to pass between the elastically deformable part and the opposing part. (4) In the overhead sliding door of the present invention, the distance from the base end of the leaf spring to the first widening portion may be shorter than the distance from the base end to the second widening portion. With this configuration, in order to move the first widening section in the depth direction by the elastic deformation of the leaf spring, it is necessary to apply a force greater than the force required to elastically deform the leaf spring in the depth direction to move the second widening section in the depth direction. Therefore, when sliding the door from the open position to the closed position to close the opening, the first widening section is pressed against the guide pin by this larger force in the sliding direction, creating a feeling of resistance (a clicking sensation) when sliding the door from the open position to the closed position to close the opening. On the other hand, in order to move the second widening section in the depth direction by the elastic deformation of the leaf spring, it is only necessary to apply a force smaller than the force required to elastically deform the leaf spring in order to move the first widening section in the depth direction. Therefore, the door can be slid more smoothly from the closed position to the open position than when sliding the door from the open position to the closed position. (5) In the overhead sliding door of the present invention, the first resistance force generated when the first widening portion comes into contact with the guide pin during the sliding movement of the door body toward the leading edge may be set to be greater than the second resistance force generated when the second widening portion comes into contact with the guide pin during the sliding movement of the door body toward the trailing edge. With this configuration, when the door slides from the open position to the closed position to close the opening, the first widening portion comes into contact with the guide pin, generating a first resistance force greater than the second resistance force. Based on this first resistance force, a feeling of resistance (click) can be created as the door slides toward the door edge. On the other hand, when the door is slid from the closed position to the open position to open the opening, even if the second widening portion comes into contact with the guide pin, the second resistance force generated is smaller than the first resistance force, so that the sliding movement of the door towards the tail end can be performed more smoothly than the sliding movement of the door towards the leading end. (6) In the overhead sliding door of the present invention, the rate of change of the spacing dimension at the position corresponding to the first widening portion along the sliding direction may be greater than the rate of change of the spacing dimension at the position corresponding to the second widening portion along the sliding direction. With this configuration, during the sliding movement of the door body, much of the force that strikes the guide pin of the first widening section can be generated as a force at a small angle intersecting the sliding direction, thus creating a feeling of resistance (click) as the door body slides toward the door edge. On the other hand, during the sliding movement of the door body, much of the force with which the second widening section collides with the guide pin can be generated as a force at an angle that significantly intersects the sliding direction, thus allowing the sliding movement of the door body toward the tail end to be smoother than the sliding movement toward the leading end. (7) In the overhead sliding door of the present invention, a retaining member may be attached to the groove portion, which has the elastically deformable portion and the opposing portion, and which forms a passage that opens on the leading edge side and the trailing edge side so that the guide pin can pass through relative to it in the sliding direction. With this configuration, for example, when the door is slid forcefully toward the tail end to open the opening, the retaining member will come into contact with the guide pin in the sliding direction with respect to the portion excluding the hooking part, thereby suppressing the risk of damage to the retaining member. (8) In the overhead sliding door of the present invention, a door pocket may be formed on one half of the opening in the sliding direction, and the door body may be housed in the door pocket by sliding toward the door tail and positioned in the open position. With this configuration, the aforementioned door pocket is formed, making it difficult to install a so-called soft closer or the like on the door end side to hold the door in the open position. However, in the present invention, since the aforementioned configuration is used, the mechanism for holding the door in the open position can be provided at a location other than the door end side. For this reason, a mechanism for holding the door in the open position can be easily installed even in top-hung sliding doors with a door pocket. [Explanation of symbols]

[0021] 1...Sliding door (top-hung sliding door), 2...Opening, 30...Frame, 31...Top frame, 32...Vertical frame, 35...Rail, 40...Door body, 41...Door body main body, 411...Groove, 412...Side, 413...Bottom, 415...Recess, 416...Bottom, 42...Running mechanism, 421...Door roller, 50...Holding member, 51...Guide pin, 52...Main body, 530...Leaf spring, 531...Base end, 532...Tip, 533...Rib, 53A...Elastic deformation part, 53B...Elastic deformation part, 54...Groove forming piece, 55...Passageway, 56...Hooking part, 561...First widening part, 562...Second widening part, 6...Wall board, 7...Door pocket, D...Diameter dimension, P1...Open position, P2...Closed position, W1~W5...Spacing dimension.

Claims

1. A top-hung sliding door comprising a door body that is suspended so as to be slidable on the leading and trailing ends of a rail provided in an opening within a building, and whose swing in the depth direction is restricted by a guide pin erected on the building side, wherein the door body is positioned in an open position where it opens the opening and a closed position where it closes the opening by sliding, A groove for the guide pin is formed in the lower part of the door body along the sliding direction of the door body, The groove portion is provided with an elastically deformable portion that can be elastically deformed in the depth direction, At least one of the elastically deformable portion and the opposing portion facing the elastically deformable portion in the depth direction is formed with a hooking portion that protrudes in the depth direction such that the distance between the elastically deformable portion and the opposing portion is narrower than the width dimension of the guide pin in the depth direction. A first widening portion is formed in the door-edge side portion of the aforementioned hooking portion, which widens the spacing dimension in the depth direction. A second widening portion is formed in the door-end portion of the aforementioned hooking part, which widens the spacing dimension in the depth direction. The aforementioned hooking portion is positioned on the door-end side relative to the guide pin when the door is in the open position, and on the door-end side relative to the guide pin when the door is in the closed position. A top-hung sliding door characterized by its features.

2. In the overhead sliding door described in claim 1, A retaining member having the elastically deformable portion and the opposing portion is attached to the groove portion. The aforementioned elastic deformation portion is one of the elastic deformation portions, The opposing portion is configured as the other elastically deformable portion that can be elastically deformed in the direction of the projection. The one elastic deformation portion and the other elastic deformation portion are each provided with the hook portion facing the direction of the projection. A top-hung sliding door characterized by its features.

3. In the overhead sliding door described in claim 1, The elastically deformable portion is formed of a leaf spring having a tip and a base and extending in the sliding direction, The aforementioned hooking portion is disposed at the tip portion. A top-hung sliding door characterized by its features.

4. In the overhead sliding door according to claim 3, The distance from the base end of the leaf spring to the first widening portion is shorter than the distance from the base end to the second widening portion. A top-hung sliding door characterized by its features.

5. In the top-hung sliding door according to claim 1, the first resistance force generated when the first widening portion contacts the guide pin during the sliding movement of the door body toward the leading edge is set to be greater than the second resistance force generated when the second widening portion contacts the guide pin during the sliding movement of the door body toward the trailing edge. A top-hung sliding door characterized by its features.

6. In the overhead sliding door described in claim 1, The rate of change in the spacing dimension at the position corresponding to the first widening section along the sliding direction is greater than the rate of change in the spacing dimension at the position corresponding to the second widening section along the sliding direction. A top-hung sliding door characterized by its features.

7. In the overhead sliding door described in claim 1, A retaining member is attached to the groove, which has the elastically deformable portion and the opposing portion, and which forms a passage that opens on the leading edge side and the trailing edge side so that the guide pin can pass through relative to it in the sliding direction. A top-hung sliding door characterized by its features.

8. In the overhead sliding door described in claim 1, A door pocket is formed on one half of the opening in the aforementioned sliding direction. The door body is moved toward the door tail end and stored in the door pocket, and positioned in the open position. A top-hung sliding door characterized by its features.

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