Double sliding door

Abstract

To prevent a door body from falling off a frame even when the door body is subjected to a large vibration (for example, a seismic intensity of 6+).SOLUTION: In a double sliding door in which a plurality of rollers 8 attached to the lower end of a door body 1 roll on a rail 7 attached to a floor surface to open / close an opening, the rollers 8 include a roller body 80 and a protrusion 81 located in the midway of a roller thickness and having a larger diameter than the roller body 80, the rail 7 includes a pair of inclined portions 73 on which the roller body 80 rests, and a groove portion 75 located between the pair of inclined portions 73 and in which the protrusion 81 is located, and a removal prevention member 9 is provided at the lower end of the door body 1, positioned between the rollers 8, and the lower end of the removal prevention member 9 is located in the groove portion 75 of the rail 7.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a sliding door. [Background technology]

[0002] Sliding doors are often used in openings in school partitions. Such sliding doors are disclosed in, for example, Patent Document 1. In sliding doors, a door body moves left and right by a roller at the lower end running on a rail laid on the floor surface. However, since the door body is attached by the so-called Kendon method, a certain clearance is generated between the upper end of the door body and the upper frame of the opening frame, and the door body may fall off the opening frame when subjected to vibration. Even if a stopper element is installed on the upper frame after the door body is attached to narrow the upper clearance to prevent the door body from falling off, the roller at the lower end of the door body may fall off the rail due to vibration acting on the door body.

[0003] In addition to the upper anti-slip element, a protruding anti-slip means is also provided on the wheel at the lower end of the door body to prevent the door body from falling off even if the door body is subjected to large vibrations.

[0004] However, conventional means for preventing the door body from falling off were not designed to handle extremely large vibrations, such as those of a seismic intensity of 6+ on the Japanese seismic scale, and there is a risk that the door body may fall off if large forces act simultaneously from multiple directions due to such large vibrations. [Patent Document 1] Patent Publication No. 2023-111513 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] The present invention aims to prevent the door body from falling off the frame even when the door body is subjected to large vibrations (for example, a seismic intensity of 6+ class). [Means for solving the problem]

[0006] The technical means adopted in the present invention to solve such problems are as follows: In a sliding door that opens and closes an opening by rolling multiple door rollers at the bottom end of the door body on a rail installed on the floor surface, The door roller includes a door roller body and a protruding portion located at the center of the thickness direction of the door roller and having a larger diameter than the door roller body. The rail includes a pair of inclined portions on which the door roller body is placed, and a groove portion located between the pair of inclined portions and in which the protrusion is located. A removal prevention member is provided at the lower end of the door body between the door wheels, and the lower end of the removal prevention member is located in the groove portion of the rail. It's a sliding door.

[0007] In one embodiment, the removal prevention member extends in the width direction of the door body, and the width dimension of the removal prevention member is larger than the diameter of the door roller, The thickness of the non-removal member is smaller than the thickness of the protruding portion of the door roller. In one embodiment, the lower end of the fall-off prevention member is located at the same height as or slightly below the lower end of the protruding portion of the door roller.

[0008] In one embodiment, the lower end of the door body has a recess, The door roller and the removal prevention member are fixed to the recess, The deviation prevention member is composed of a vertical piece and a horizontal piece at the upper end of the vertical piece, The horizontal piece is fixed to the upper surface of the recess, The lower end of the vertical piece is located in the groove of the rail.

[0009] In one embodiment, a spacer is incorporated between the upper surface of the recess and the horizontal piece, making it possible to adjust the height position of the removal prevention member. Effect of the Invention

[0010] In the present invention, in addition to the fact that each of the convex portions of the multiple door rollers is positioned in the groove portion of the rail, the lower end portion of the anti-detachment member is positioned in the groove portion of the rail. Therefore, when a large vibration is applied to the door body, the convex portions hook into the groove portion and the anti-detachment member hooks into the groove portion, thereby preventing the door body from falling off from the opening frame. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a front view of a partition unit equipped with sliding doors according to the present embodiment. [Diagram 2] FIG. 2 is a front view of the door body of the sliding door according to the embodiment. [Diagram 3] FIG. 2 is a vertical cross-sectional view of the partition unit according to the present embodiment. [Figure 4] FIG. 4 is a partial enlarged view of the lower portion of FIG. [Diagram 5] FIG. 2 is a cross-sectional view of the sliding door according to the present embodiment. [Figure 6] A partial vertical cross-sectional view showing an upper anti-detachment element of a sliding door according to this embodiment. [Figure 7] The upper figure is a partial front view showing the upper anti-removal element of the sliding door in this embodiment, and the lower figure is a partial bottom view showing the upper anti-removal element of the sliding door in this embodiment. [Figure 8] FIG. 4 is a diagram showing a door roller of the door body according to the embodiment. [Figure 9] 1 is a diagram showing a removal prevention member for a sliding door according to an embodiment of the present invention. FIG. [Figure 10] 13A and 13B are diagrams showing a spacer for adjusting the height of the anti-removal member of the sliding door according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [A] Overall structure of sliding doors 1 is a front view of a sliding door according to this embodiment, which is made up of an opening frame that forms an opening, and a first door body 1A and a second door body 1B that open and close the opening frame, and a sliding window 2 is provided on the upper side of the sliding door. Please note that the first door body 1A and the second door body 1B are substantially the same in configuration, and in this specification, the first door body 1A and the second door body 1B may be collectively referred to as "door body 1".

[0013] The opening frame of the sliding door is composed of a horizontal member 3 forming the upper frame 3A, left and right vertical frames 4 and 5, and a lower frame 6, and the opening frame (upper frame 3A, vertical frames 4 and 5, lower frame 6) has a projected dimension larger than the total thickness dimension (projected dimension) of the two door bodies 1 (first door body 1A and second door body 1B). A pair of rails 7 (first rail 7A, second rail 7B) are laid in parallel to the opening width direction on the lower frame 6, and the first door body 1A moves left and right by rolling on the first rail 7A at its lower end to open and close the opening, and the second door body 1B moves left and right by rolling on the second rail 7B at its lower end to open and close the opening.

[0014] [B] Structure of the door As shown in Figures 2 to 5, the door body 1 has a first visible surface 10, a second visible surface 11, an upper end surface 12, a downwardly concave lower end portion 13, a first door stop portion 14 at one end in the width direction, and a second door stop portion 15 at the other end in the width direction. The door body 1 according to this embodiment has a first wooden plywood 10' forming the first visible surface 10 and a second wooden plywood 11' forming the second visible surface 11, and between the first wooden plywood 10' and the second wooden plywood 11', a wooden upper frame 12', a wooden lower frame 13', a first wooden vertical frame 14', and a second wooden vertical frame 15' forming the upper end surface 12 are provided.

[0015] The upper ends of the first wooden plywood 10' and the second wooden plywood 11' are flush with the upper end surface 12. The lower portions of the first wooden plywood 10' and the second wooden plywood 11' extend downward beyond the lower end of the bottom frame 13', and a lower recess is formed at the lower end 13 of the door body 1 by the lower portions of the first wooden plywood 10' and the second wooden plywood 11' and the lower surface of the bottom frame 13. The lower recess of the door body 1 is provided with a lower end frame 16 made of a metal element having a U-shape in cross section, formed from an upper surface portion 160 and a pair of facing portions 161, 162, and the lower end frame 16 forms a recess at the lower end 13.

[0016] The side portions of the first wooden plywood 10' and the second wooden plywood 11' protrude beyond the first wooden vertical frame 14' and the second wooden vertical frame 15', and a vertical frame 17 made of aluminum is fitted into a first side recess formed between one side portion of the first wooden plywood 10' and the second wooden plywood 11' and the first vertical frame 14', and a shock absorbing material that forms the first door stop portion 14 is provided in the vertical frame 17. The vertical frame 17 made of aluminum is fitted into a second side recess formed between the other side portion of the first wooden plywood 10' and the second wooden plywood 11' and the second vertical frame 15', and a shock absorbing material that forms the second door stop portion 15 is provided in the vertical frame 17.

[0017] A window section 18 is provided in the upper portion of the door body 1 according to this embodiment. A paper core 19 is filled in the space (excluding the window section 18) surrounded by the upper frame 12', the lower frame 13', the first vertical frame 14', and the second vertical frame 15' between the first wooden plywood 10' and the second wooden plywood 11'.

[0018] Two door rollers 8 are provided at a distance from each other in the width direction of the door body 1 at the lower end 13 of the door body 1. The door roller 8 is composed of a door roller body 80 and a protrusion 81 that is located in the center of the thickness direction of the door roller 8 and has a larger diameter than the door roller body 80; in other words, the outer circumferential surface of the door roller body 80 is located on both sides of the protrusion 81. The outer circumferential surface of the door roller body 80 of the door roller 8 rests on a pair of inclined portions 73 of the rail element 7, and the protrusion 81 is located in the groove portion 75 between the pair of inclined portions 73.

[0019] The door roller 8 is rotatably attached to a bracket 82 that is U-shaped in cross section, and is provided at the lower end 13 of the door body 1 by positioning the door roller 8 in the recess of the lower end 13 and fixing the bracket 82 to the upper surface (bottom frame 13') of the recess. The upper surface 160 and bottom frame 13' of the lower end frame 16 are cut out at the location of the door roller 8, with the upper portion of the door roller 8 located above the upper surface 160 and the lower portion of the door roller 8 located below the lower end of the door body 1 (the lower ends of the first wooden plywood 10' and second wooden plywood 11' that form the lower end 13).

[0020] [C] Opening frame configuration The left and right vertical frames 4, 5 of the sliding door opening frame extend to the main body (ceiling) located at the upper end of the sliding window 2, and the upper parts of the vertical frames 4, 5 form the left and right vertical frames of the sliding window 2, and the horizontal member 3 forms the interlocking member.

[0021] The lower surface of the cross member 3 is recessed, and the upper frame 3A, which is composed of an upper surface portion 30 and a pair of facing portions 31, 32, is provided in the recess. A partition piece 33 hangs down from the middle portion of the upper frame 3A in the width direction (projection direction). The upper end of the first door body 1A is slidably fitted between the facing portion 31 and the partition piece 33 of the upper frame 3A, and the upper end of the second door body 1B is slidably fitted between the facing portion 32 and the partition piece 33 of the upper frame 3A. A plate-shaped upper anti-slip element 34 is provided on the upper surface portion 30 of the upper frame 3A at a predetermined portion in the opening width direction (for example, an upper portion above the trailing edge portion of the door body 1 in the fully closed position). The cross member 3 according to this embodiment is made of wood, and the upper frame 3A is made of metal (for example, aluminum), but these materials are not limited.

[0022] The inner facing surfaces of the left and right vertical frames 4, 5 of the opening frame according to this embodiment are concave in cross section. One corner of the recess 40 on the inner facing surface of the vertical frame 4 is abutted by the first door stop portion 14 of the first door body 1A, and the other corner is abutted by the first door stop portion 14 of the second door body 1B. One corner of the recess 50 on the inner facing surface of the vertical frame 5 is abutted by the second door stop portion 15 of the first door body 1A, and the other corner is abutted by the second door stop portion 15 of the second door body 1B.

[0023] The lower frame 6 is composed of an upper surface portion 60 and a pair of facing portions 61, 62, and is embedded in the floor surface FL. In one embodiment, the upper surface portion 60 is located slightly higher than the floor surface FL. A pair of recesses 63 are formed in the upper surface portion 60 of the lower frame 6. The recesses 63 are arranged in parallel in the opening width direction, and each recess 63 is provided with a long rail 7. That is, the lower frame 6 has a pair of rails 7A, 7B extending parallel to the opening width direction. The first door body 1A moves left and right to open and close the opening by the door roller 8 provided at the lower end rolling on the rail 7A, and the second door body 1B moves left and right to open and close the opening by the door roller 8 provided at the lower end rolling on the rail 7B.

[0024] The rails 7A and 7B have substantially the same configuration, and in this specification, the rails 7A and 7B are collectively referred to as "rail 7" to describe the configuration. The rail 7 is a long element having a U-shaped cross section consisting of a base side 70 and a pair of rising visible sides 71, 72, and a support part (running part) of the door roller 8 at the lower end of the door body 1A, 1B is integrally formed at the upper end portion of the pair of visible sides 71, 72. The support part has an inclined part 73 that is inclined downward from the upper end toward the inside, and the inclined part 73 extends in the longitudinal direction of the rail 7 and forms the running surface of the door roller body 80.

[0025] The lower end of the inclined portion 73 forms a protrusion 74 extending in the length direction of the rail 7, and a groove 75 is formed between the pair of protrusions 74. In this embodiment, the inclined portion 73 has a gentle concave curved surface. The protrusion 74 has a vertical surface with approximately the same height as the protrusion dimension of the protrusion 81 of the door roller 8, and the side surface of the protrusion 81 faces the vertical surface of the protrusion 74 closely without contacting it. In the illustrated embodiment, the height dimension of the protrusion 81 is slightly larger than the height dimension of the vertical surface of the protrusion 74, and the lower end of the protrusion 81 protrudes slightly downward from the lower end of the vertical surface of the protrusion 74. In the rail 7, it is sufficient that the groove 75 is formed below the pair of inclined portions 73, and it is not essential that the protrusion 74 is provided. For example, a pair of vertical surfaces extending from the lower ends of the pair of inclined portions 73 to the base 70 may be formed.

[0026] The rail 7 is installed with its bottom edge 70 abutting the bottom surface of the recess 63 of the lower frame 6, and with its pair of visible edges 71, 72 abutting a pair of visible surfaces of the recess 63. In the illustrated embodiment, the upper ends (upper ends of the support parts) of the visible edges 71, 72 of the rail element 7 are located slightly lower than the upper end part (upper surface part 60 of the lower frame 6) of the recess 63, but they may be at the same height. In this embodiment, the lower frame 6 is made of stainless steel and the rail 7 is made of aluminum, but these materials are not limited to these.

[0027] [D] Sliding window The sliding window 2 comprises a window frame made up of an upper frame 21 formed at the lower end of an upper horizontal member 20 fixed to the upper ends of the main body and the left and right vertical frames 4, 5, left and right vertical stiles formed from the upper parts of the left and right vertical frames 4, 5, and a lower frame 3B formed on the upper end surface of the horizontal member 3, and window panels 2A, 2B for opening and closing the window frame. The upper frame 21 of the window frame has a cross-sectional shape similar to that of the upper frame 3A of the opening frame of a sliding door, and is provided with an upper anti-removal element 22 similar to the upper anti-removal element 34 of a sliding door (see Figure 1). Note that a transom section may be provided above the sliding door in place of the sliding window 2.

[0028] [E] Measures to control deviations The door body 1 according to this embodiment is attached to the opening frame by a so-called Kendon method, so that when the door body 1 is attached to the opening frame, the clearance between the upper end surface 12 of the door body 1 and the upper surface 30 of the upper frame 3A is relatively large. In this embodiment, the upper side anti-slip element 34 is provided at a predetermined portion of the upper surface 30 of the upper frame 3A to narrow the clearance above the upper end surface 12 of the door body 1. In this way, when the door body 1 is subjected to vibration (vertical shaking) and moves upward, the upper end surface 12 of the door body 1 abuts against the upper side anti-slip element 34, thereby restricting the upward movement of the door body 1 and preventing the lower end door roller 8 from falling off the rail 7. In the illustrated embodiment, the upper side anti-slip element 34 is provided above the tail side (the side farther from the vertical frames 4 and 5) of the door body 1 in the fully closed position. As shown in Figures 6 and 7, the upper anti-slip element 34 in this embodiment is a rectangular plate with a predetermined thickness, and is fixed to the upper surface 30 of the upper frame 3A and the cross member 3 with screws 35, with the long holes 340 aligned in the opening width direction.

[0029] At the lower end of the door body 1, the door roller 8 has a door roller body 80 resting on a pair of inclined portions 73 of the rail element 7, and a convex portion 81 located in a groove portion 75 at the lower end of the pair of inclined portions 73. The side surface of the convex portion 81 faces closely but without contacting the vertical surface of the protrusion 74 that forms the groove portion 75. When vibration (horizontal shaking) acts on the door body 1 and it tries to move in the expected direction, the convex portion 81 of the door roller 8 abuts (hooks) against the protrusion 74 with the door roller body 80 abutting against the inclined portions 73, thereby preventing the door roller 8 from coming off the rail 7.

[0030] In this embodiment, a detachment prevention member 9 is provided at the lower end 13 of the door body 1, located between the two door rollers 8. In the illustrated embodiment, the detachment prevention member 9 is provided at the lower end of the central portion in the width direction of the door body 1. The detachment prevention member 9 has a T-shaped cross section consisting of a vertical piece 90 and a horizontal piece 91 at the upper end of the vertical piece 90, and the horizontal piece 91 is fixed to the upper surface of the recess in the lower end 13 (the upper surface portion 160 of the lower end frame 16) with a screw 93. More specifically, as shown in FIG. 9, the horizontal piece 91 is larger than the width dimension of the vertical piece 90 in the longitudinal direction, and holes 910 for inserting the screws 93 are formed at the four corners. A horizontally bent piece 90a is integrally formed at the upper end of the vertical piece 90, and the vertical piece 90 is fixed (for example, welded) to the horizontal piece 91 via the bent piece 90a. The width dimension (projected width) of the horizontal piece 91 of the removal prevention member 9 is approximately the same as the groove width of the recess in the lower end 13 (projected width of the upper surface portion 160 of the lower end frame 16), which makes it easy to position the removal prevention member 9 when attaching it. The removal prevention member 9 in this embodiment is made of steel, but the material is not limited as long as it has a predetermined strength, and may be, for example, another metal member. In the illustrated embodiment, one removal prevention member 9 is provided in the center of the width direction of the door body 1, located between the two door rollers 8, but multiple removal prevention members 9 may be provided between the two door rollers 8.

[0031] The lower end of the vertical piece 90 of the anti-fall-out member 9 protrudes downwardly below the lower end of the door body 1 (the lower ends of the first wooden plywood 10' and the second wooden plywood 11' which form the lower end 13), and the lower end portion of the vertical piece 90 is located in the groove 75 of the rail 7 and faces closely but not in contact with the vertical surface of the protrusion 74. In the illustrated embodiment, the lower end of the vertical piece 90 protrudes slightly downwardly below the lower end of the vertical surface of the protrusion 74. As the anti-fall-out member 9 is provided at the lower end of the door body 1, it does not mar the appearance of the sliding door.

[0032] The removal prevention member 9 extends in the width direction of the door body 1, and the vertical piece 90 of the removal prevention member 9 is a plate-like element extending in the width direction, and the width dimension of the vertical piece 90 is larger than the diameter of the door roller 8. The thickness of the vertical piece 90 of the removal prevention member 9 is smaller than the thickness of the protruding portion 81 of the door roller 8, and when the lower end portion of the vertical piece 90 is positioned in the groove portion 75, a predetermined clearance is provided, and the vertical piece 90 is prevented from contacting the rail 7 (the protruding strip 74 at the lower end of the inclined portion 73) during normal movement of the door body 1. In this embodiment, the position of the lower end (the lower end of the protruding portion 81) of the door roller 8 is the same as the position of the lower end (the lower end of the vertical piece 90) of the removal prevention member 9, but the lower end of the vertical piece 90 may extend downward beyond the lower end of the protruding portion 81.

[0033] When vibration acts on the door body 1, the protrusion 81 of the door roller 8 abuts against the ridge 74 that forms the groove 75, thereby primarily preventing the door roller 8 from coming off the rail 7, but when a large vibration (for example, an earthquake of intensity 6+) acts, there is a risk that the engagement between the protrusion 81 of the door roller 8 and the groove 75 (ridge 74) may come off. In this embodiment, when the engagement between the protrusion 81 of the door roller 8 and the groove 75 (ridge 74) of the door roller 8 is about to come off, the lower end portion of the vertical piece 90 of the come-off prevention member 9 hooks onto the groove 75 (ridge 74), thereby restricting the movement in the direction in which the engagement between the protrusion 81 of the door roller 8 and the groove 75 (ridge 74) comes off, and preventing the door body 1 from falling off the opening frame.

[0034] In mounting the removal prevention member 9 according to this embodiment, a plate-shaped spacer 92 is inserted between the upper surface of the recess in the lower end 13 of the door body 1 (upper surface 160 of the lower end frame 16) and the horizontal piece 91 of the removal prevention member 9, thereby making it possible to adjust the height position of the removal prevention member 9 (i.e., the position of the lower end of the vertical piece 90). This ensures a constant engagement between the lower end of the vertical piece 90 and the groove 75 in response to changes in height caused by unevenness. As shown in FIG. 10, the spacer 92 according to this embodiment is made of a rectangular thin plate (thinner than the horizontal piece 91 of the removal prevention member 9), has approximately the same area as the horizontal piece 91 of the removal prevention member 9, and has holes 920 formed in the four corners for inserting screws 93. One or more spacers 92 are sandwiched between the upper surface 160 of the lower end frame 16 of the door body 1 and the horizontal piece 91 of the anti-detachment member 9, and the holes 920 of the spacers 92 are aligned with the holes 910 formed in the horizontal piece 91, and fixed with screws 93. [Explanation of symbols]

[0035] 1 Door body 7 Rail 73 Slope 74 Projection 75 Groove 8 Door Car 80 Door roller body 81 Convex 9. Anti-detachment member 90 vertical piece 91 horizontal piece 92 Spacer

Claims

1. In a sliding door that opens and closes an opening by rolling multiple door wheels at the bottom end of the door body on a rail installed on the floor surface, The door roller includes a door roller body and a protruding portion located at the center of the thickness direction of the door roller and having a larger diameter than the door roller body. The rail includes a pair of inclined portions on which the door roller body is placed, and a groove portion located between the pair of inclined portions and in which the protrusion is located. A removal prevention member is provided at the lower end of the door body between the door wheels, and the lower end of the removal prevention member is located in the groove portion of the rail. Sliding door.

2. The removal prevention member extends in the width direction of the door body, and the width dimension of the removal prevention member is larger than the diameter of the door roller, The thickness of the detachment prevention member is smaller than the thickness of the protruding portion of the door roller.

2. The sliding door according to claim 1.

3. The lower end of the door body has a recess, The door roller and the removal prevention member are fixed to the recess, The deviation prevention member is composed of a vertical piece and a horizontal piece at the upper end of the vertical piece, The horizontal piece is fixed to the upper surface of the recess, The lower end of the vertical piece is located in the groove of the rail. A sliding door according to claim 1 or 2.

4. A spacer is inserted between the upper surface of the recess and the horizontal piece, thereby making it possible to adjust the height position of the removal prevention member. The sliding door according to claim 3.

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