Door roller and fitting

Abstract

To provide a door roller in which diameter dimensions of wheels can be reduced, and a fitting.SOLUTION: A door roller 5 allows a paper screen of a double sliding window to slide on a rail of a lower frame, and includes: a door roller frame 51 attached to the lower frame and having a pair of side plate portions 551 facing each other at a distance; and wheels 61 supported by the door roller frame 51. The wheel 61 includes: a pair of bearings 62 provided on the pair of side plate portions 551; and shaft rollers 63 rolling on the rails. The shaft rollers 63 pass through the pair of bearings 62.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a door roller and fitting that allows a shoji screen to slide on a rail on a frame body. [Background technology]

[0002] A sliding door has been known as a fixture, comprising a frame attached to an opening in a building and a shoji screen that can slide horizontally within the frame (see Patent Document 1). A horizontal rail is provided on the bottom frame of the frame, and a door roller that can run on the rail is attached to the bottom stile of the shoji screen. The door roller is equipped with a wheel having an axle, an outer ring portion that surrounds the outer periphery of the axle, and a bearing that is arranged between the outer ring portion and the axle, and a groove that engages with the rail is formed on the circumferential surface of the outer ring portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-105076 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the sliding door described in Patent Document 1, the outer ring of the door roller is arranged so that it surrounds the outer periphery of the axle, and furthermore, a bearing is arranged between the outer ring and the axle, so there is a risk that the diameter of the wheel will be large. Furthermore, if the diameter of the wheel is large, there is a risk that the visibility of the bottom frame to which the door roller is attached will also be large, making it difficult to improve the visibility and insulation of the sliding door.

[0005] An object of the present invention is to provide a door roller and a fitting that can reduce the diameter of the wheel. [Means for solving the problem]

[0006] The door roller of the present invention is a door roller that allows a shoji screen in building fixtures to slide along the rails of a frame body, and is characterized in that it comprises a door roller frame that is attached to the frame of the shoji screen and has a pair of side plate portions that face each other at a distance, and wheels that are supported by the door roller frame, and the wheels have a pair of bearings provided on the pair of side plate portions and axle rollers that roll on the rails, and the axle rollers pass through the pair of bearings. The fixture of the present invention is characterized by comprising a frame body having a rail and a shoji screen to which the door roller of the present invention that runs on the rail is attached. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a door roller and a fitting that can reduce the diameter of the wheel. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an explanatory diagram illustrating an overall view of a fixture and a door roller according to an embodiment of the present invention; [Figure 2] FIG. 2 is an exploded perspective view showing a door roller according to the embodiment. [Figure 3] FIG. [Figure 4] FIG. 2 is a vertical cross-sectional view showing a door roller according to the embodiment. [Figure 5] 5 is a cross-sectional view taken along line VV in FIG. 4. [Figure 6] FIG. 4 is an explanatory diagram showing a state in which the door roller according to the embodiment is used. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Configuration of this embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In Figure 1, a sliding window 1 as a fixture according to this embodiment comprises a window frame 2 (frame body) installed in an opening in a building, and a shoji screen 3 (3A, 3B) installed so that it can slide within the window frame 2. The window frame 2 is composed of an upper frame 21, a lower frame 22, and left and right vertical frames 23. The shoji screen 3 is composed of an upper frame (not shown), a lower frame 32, left and right vertical frames (not shown), and a surface material 35 such as a plurality of glass panels, all assembled together. The lower frame 22 is provided with a metal rail 221 (see Figure 6) that runs in the sliding direction of the shoji screen 3. The lower frame 32 has a pair of lower frame sighting surfaces 321 facing each other in the projection direction, and a pair of upper and lower lower frame sighting surfaces 322 that are continuous with the lower frame sighting surfaces 321. Door rollers 5 that can run on rails 221 are attached to the lower frame 32, and in this embodiment, are provided at both ends of the lower frame 32. Note that the upper frame 21 and the upper frame also have rails and fitting grooves that run along the sliding movement direction (not shown). In the following description, the left-right direction (sliding movement direction) of the sliding window 1 is the X-axis direction, the up-down direction of the sliding window 1 is the Y-axis direction, and the projection direction of the sliding window 1 is the Z-axis direction. The X, Y, and Z axis directions are perpendicular to each other.

[0010] 2 to 5, the door roller 5 includes a door roller frame 51 and a wheel 61 rotatably supported by the door roller frame 51. The door roller frame 51 includes an outer frame 52 attached to the bottom stile 32 via an attachment member 53, and two inner frames 55 (55A, 55B) arranged side by side on the outer frame 52 along the X-axis direction, which is the longitudinal direction of the rail 221.

[0011] The outer frame 52 is made of metal and has a pair of side plates 521 extending along the X-axis direction and a pair of end plates 522 connecting both ends of the pair of side plates 521 in the X-axis direction. The pair of side plates 521 are disposed facing each other at a distance in the Z-axis direction. The end plates 522 are formed in a flat plate shape with upper and lower surfaces extending along the X-axis and Z-axis directions, and guide members 71, described below, are screwed to each of the pair of end plates 522. Furthermore, an axial hole 523 is formed in the center of the side plates 521 in the X-axis direction, through which an axial pin 531 extending along the Z-axis direction (a direction perpendicular to the longitudinal direction of the rail 221) is inserted. The pivot pin 531 is also inserted through a pivot hole 532 of the mounting member 53 that is screwed to the lower frame recessed surface portion 322. Therefore, the outer frame 52 is attached to the lower frame 32 (the mating member to which the outer frame 52 is attached) so as to be swingable about the pivot pin 531. In addition, a pivot hole 524A is formed in one of the side plates 521 at a position on one side of the center position of the outer frame 52 in the X-axis direction, through which a pivot pin 561 (described later) is inserted for swingably connecting the inner frame 55A. A pivot hole 524B is formed in the other of the side plates 521 at a position on the other side of the center position of the outer frame 52 in the X-axis direction, through which another pivot pin 561 is inserted for swingably connecting the inner frame 55B. Note that a reinforcing shaft 54 ​​and a reinforcing member 541 are attached to the pair of side plates 521 at positions on both sides of the pivot hole 523 in the X-axis direction, along the Z-axis direction, to reinforce the outer frame 52.

[0012] Inner frame 55A is disposed on one side of the center position of outer frame 52 in the X-axis direction, and inner frame 55B is disposed on the other side of the center position of outer frame 52 in the X-axis direction. Note that inner frames 55A and 55B are configured similarly to each other, and therefore, the following will describe in detail each component of inner frame 55A, and the components of inner frame 55B will be appropriately assigned the same reference numerals as the components of inner frame 55A and will not be described in detail again. The inner frame 55A is made of metal and has a pair of side plates 551 extending along the X-axis direction and a pair of end plates 552 connecting both ends of the pair of side plates 551 in the X-axis direction. The pair of side plates 551 are disposed facing each other at a distance in the Z-axis direction. The end plates 552 are formed in a flat plate shape with upper and lower surfaces extending along the Y- and Z-axis directions. A shaft hole 553 is formed in the center of the side plates 551 in the X-axis direction, through which a shaft pin 561 extending along the Z-axis direction is inserted. The shaft pin 561 is also inserted through the shaft hole 524A of the outer frame 52 described above. Therefore, the inner frame 55A is connected to the outer frame 52 (the component to which the inner frame 55A is attached) so as to be pivotable about the shaft pin 561, and is attached to the lower frame 32 via the outer frame 52 and the attachment member 53. In this embodiment, two wheels 61 are attached to the inner frame 55A. Specifically, two bearing holes 571, into which a pair of bearings 62 (described later) are fitted, are formed in each of the pair of side plate portions 551. The two bearing holes 571 in each of the side plate portions 551 are arranged side by side in the X-axis direction, and the above-mentioned axle hole 553 is disposed between the two bearing holes 571. Therefore, the axle pin 561 is disposed between the two wheels 61, and when the outer frame 52 swings around this axle pin 561, one wheel 61 moves upward and the other wheel 61 moves downward. In addition, two wheels 61 are attached to the inner frame 55B, just like the inner frame 55A, and are connected to the outer frame 52 (the counterpart member to which the inner frame 55B is attached) via another axle pin 561 inserted into the aforementioned axle hole 524B of the outer frame 52.

[0013] In the inner frame 55 described above, the lower edges of the pair of side plate portions 551 are positioned to protrude downward further than the lower edges of the pair of side plate portions 521 of the outer frame 52, and are positioned at a position roughly equivalent to the lower part of the guide member 71 or protruding slightly downward further than the lower part. Furthermore, the lower edges of the pair of side plate portions 551 are positioned to protrude downward further than the lower edge of the stile sighting surface portion 321 when the door roller 5 is attached to the stile 32. For this reason, for example, when the shoji screen 3 is placed upright on the floor or a floor board such as a square piece of wood, the door roller frame 51 can be prevented from abutting against the floor or the floor board, and the stile sighting surface portion 321 can be prevented from directly abutting against the floor or the floor board, thereby reducing the risk of the stile sighting surface portion 321 being pressed against the floor or the floor board and being deformed.

[0014] The wheels 61 are made of metal, and in this embodiment, two wheels are provided side by side along the X-axis direction on each of the inner frames 55A and 55B, resulting in four wheels being provided on the roller frame 51. The wheels 61 include a pair of bearings 62 provided on the pair of side plate portions 551, and axle rollers 63 that roll on the rails 221. The bearing 62 is configured as a so-called ball bearing in which a spherical rotor 623 (ball) is disposed between an outer ring 621 and an inner ring 622 . The axle roller 63 has an axle portion 631 extending in the Z-axis direction and penetrating into the inner rings 622 of a pair of bearings 62, and a groove portion 632 integrally formed on the circumferential surface of the axle portion 631 at a position between the pair of bearings 62 and recessed along the circumferential direction. The axle portion 631 has enlarged diameter portions at both ends, one of which is formed by being crushed after the axle portion 631 is inserted into a pair of bearings 62, so as to prevent it from coming off the bearings 62. In addition, enlarged diameter portions are formed at both ends of each of the above-mentioned axle pins 531, 561 in a substantially similar manner, so as to prevent it from coming off the respective mounting mating members. The recessed groove 632 is accommodated within the inner frame 55A. The recessed groove 632 has a pair of annular side walls 633 that protrude in a radial direction perpendicular to the axial direction (Z-axis direction) of the axle portion 631, and an annular bottom wall 634 that is continuous with the pair of side walls 633. The outer diameter of the bottom wall 634 is larger than the diameter of the axle portion 631, and the diameters of the pair of side walls 633 are larger than the diameter of the bottom wall 634 and smaller than the height of the inner frame 55A in the Y-axis direction. In this embodiment, the diameters of both the pair of side walls 633 and the bottom wall 634 are smaller than the diameter of the bearing 62. Furthermore, the width between a pair of side surfaces 633A of the pair of side walls 633 that face each other in the Z-axis direction is larger than the width of the rail 221 in the Z-axis direction. The axle roller 63 configured in this manner is formed so that its diameter is smaller than the diameter of the pair of bearings 62, and the rail 221 is arranged in the recessed groove portion 632 thereof.

[0015] A resin guide member 71 that can slide against the side surfaces of the rail 221 is screwed to a pair of end plate portions 522 of the outer frame 52. The guide member 71 has a block-shaped base portion 711 that is arranged above the end plate portions 522, a pair of guide side portions 712 that are continuous with the base portion 711 and that are arranged below the end plate portions 522, and a slit-shaped mounting groove portion 713 that is formed between the base portion 711 and the pair of guide side portions 712. In this guide member 71, as shown in FIG. 6, for example, the end plate portion 522 is disposed in the mounting groove portion 713, and the rail 221 is disposed between a pair of guide side surfaces 712A of the pair of guide side portions 712 that face each other in the Z-axis direction. Here, the width dimension between the pair of guide side surfaces 712A is larger than the width dimension of the rail 221 and smaller than the width dimension between the pair of side surfaces 633A of the axle roller 63 (see FIG. 5). Therefore, when the metal axle roller 63 rolls on the rail 221, the guide side surfaces 712A of the resin guide member 71 slide against the side surfaces of the rail 221 before the side surfaces 633A interfere with the side surfaces of the rail 221, thereby guiding the expected position of the door roller 5 relative to the rail 221. This makes it possible to suppress wear due to interference between the axle roller 63 and the rail 221 and reduce the generation of wear powder.

[0016] In the sliding window 1 described above, when the shoji screen 3 (3A, 3B) slides in the X-axis direction within the window frame 2, the small-diameter axle rollers 63 of the wheels 61 supported by the roller frame 51 roll on the rails 221, causing the rollers 5 to run in the X-axis direction along the rails 221. At this time, since the outer frame 52 and the inner frames 55A, 55B can each swing, even if there is, for example, some foreign matter on the rails 221, they can smoothly overcome it, stabilizing the sliding movement of the shoji screen 3. Furthermore, in the sliding window 1, the door rollers 5 are configured using the small diameter axle rollers 63 described above, so the visible dimensions of the lower frame visible surface portion 321 of the lower frame 32 to which the door rollers 5 are attached can also be reduced, which allows the area of ​​the face material 35 to be increased, improving visibility, and also by slimming down the lower frame 32, which is a part with lower insulating properties than the face material 35, the insulating properties of the shoji screen 3 can be improved.

[0017] [Variations] In the above embodiment, the roller frame 51 is configured with the outer frame 52 and the inner frames 55A and 55B, but is not limited to this. For example, the roller frame 51 may be configured with the inner frame 55A (or 55B), or the roller frame 51 may be configured with the outer frame 52 to which the wheels 61 can be attached. In the above embodiment, the diameter of the axle rollers 63 may be equal to the diameter of the pair of bearings 62, or may be larger than the diameter of the bearings 62 as long as they fit within the inner frame 55. Even in this case, it is easy to configure the diameter of the axle rollers 63 to be smaller than that of a wheel in which the axle, bearings, and outer ring are arranged linearly in the radial direction, for example. In the above embodiment, the axle roller 63 is formed with a groove portion 632, but this is not limited thereto. For example, if the door roller 5 is configured to run smoothly on the rail 221 even without the pair of side surfaces 633A, the groove portion 632 may be omitted. In the above embodiment, the axle portion 631 and the groove portion 632 are integrally formed in the axle roller 63, but this is not limiting, and the axle portion 631 and the groove portion 632 may be formed as separate members. In this case, the members that form the axle roller 63 can be simply configured, and the axle roller 63 can be easily formed. In the above embodiment, a resin guide member 71 is attached to the roller frame 51, but this is not limited to this. If the roller 5 can run properly on the rail 221 without the guide member 71, the configuration of the guide member 71 may be omitted. In the above embodiment, the lower edges of the pair of side plate portions 551 of the inner frame 55 are positioned at a position that protrudes downward from the lower frame sighting surface portion 321, but this is not limited to this. For example, if the weight of the shoji screen 3 is not heavy and the lower frame sighting surface portion 321 comes into direct contact with the floor or floor board when the shoji screen 3 is placed upright on the floor or floor board without causing deformation of the lower frame sighting surface portion 321, the lower edges of the pair of side plate portions 551 of the inner frame 55 may be positioned at the same height as the lower frame sighting surface portion 321 or at a position that is recessed above the lower frame sighting surface portion 321. In the above embodiment, two inner frames 55A and 55B are connected to the outer frame 52, but this is not limiting, and for example, three or more inner frames 55 may be connected. In the above embodiment, the wheels 61 are made of metal, but the wheels 61 are not limited to this and may be made of resin, for example. In the above embodiment, two wheels 61 are attached to one inner frame 55, but the present invention is not limited to this, and three or more wheels 61 may be attached to one inner frame 55. In the above embodiment, the door roller 5 may be configured with a door roller height adjustment mechanism (not shown) that adjusts its height position, and for example, if the shoji screen 3 is tilted to the left or right, a structural member using a wedge or a slope may be used between the door roller frame 51. In the above embodiment, the sliding window 1 has been described as the fixture, but other types of sliding windows such as a single sliding window may also be used.

[0018] [Summary of the invention] (1) The door roller of the present invention is a door roller that allows a shoji screen in building fixtures to slide on a rail of a frame body, and is characterized in that it comprises a door roller frame that is attached to the frame of the shoji screen and has a pair of side plate portions that face each other at a distance, and wheels that are supported by the door roller frame, and the wheels have a pair of bearings provided on the pair of side plate portions and axle rollers that roll on the rails, and the axle rollers pass through the pair of bearings. (2) In the door roller of the present invention, the diameter of the axle roller may be smaller than the diameter of the pair of bearings. With this configuration, the door roller can be positioned closer to the rail than when the diameter of the axle roller is set to the same diameter as the diameter of the pair of bearings, for example. (3) In the door roller of the present invention, the axle roller may have a groove formed along the circumferential direction, in which the rail is disposed between the pair of bearings. This configuration stabilizes the position of the axle roller relative to the rail, allowing the sliding movement of the shoji screen to which the door roller is attached to be carried out smoothly. It also eliminates the risk of the door roller frame or bearing interfering with the rail. (4) In the door roller of the present invention, the door roller frame may be configured such that at least two of the wheels are arranged side by side along the longitudinal direction of the rail, and the door roller frame may be swingably connected to a mating member via an axle pin along a direction perpendicular to the longitudinal direction of the rail at a position between the at least two of the wheels. With this configuration, when the door roller runs on the rail, even if there is some foreign object on the rail, the door roller can swing around the pivot pin and overcome the object, so that the shoji screen to which the door roller is attached can slide stably. (5) In the door roller of the present invention, the door roller frame comprises an outer frame attached to the frame of the shoji screen via an attachment member, and at least two inner frames arranged side by side on the outer frame along the longitudinal direction of the rail, at least two wheels are arranged side by side on each of the inner frames along the longitudinal direction of the rail, the outer frame is swingably connected to the attachment member via an axle pin along a direction perpendicular to the longitudinal direction of the rail at a position between the inner frames, and the inner frame may be swingably connected to the outer frame via an axle pin along the orthogonal direction at a position between at least two of the wheels. With this configuration, when the door roller runs on the rail, even if there is some foreign object on the rail, the inner and outer frames can swing around their respective axle pins, allowing the foreign object to be overcome more smoothly, thereby allowing the shoji screen to be attached to the door roller to slide more stably. Also, since the present invention has at least four wheels, it is possible to construct a door roller that is sufficiently durable even when the shoji screen is heavy. (6) In the door roller of the present invention, a resin guide member having a pair of guide side surfaces arranged across the rail in a direction perpendicular to the longitudinal direction of the rail is attached to the door roller frame, and the width dimension between the pair of guide side surfaces may be larger than the width dimension of the rail and smaller than the width dimension of the groove portion. With this configuration, the guide member stabilizes the position of the door roller relative to the rail as it travels on the rail, and the pair of guide side surfaces slide against the rail, preventing direct contact between the rail and the sides of the recessed groove, thereby reducing wear on the rail and axle rollers and the generation of wear powder. In particular, when the weight of the shoji screen is heavy, the wear increases and a lot of wear powder is likely to be generated, but even in such cases, the provision of the guide member makes it possible to reduce wear on the rail and axle rollers and the generation of wear powder. (7) The fixture of the present invention comprises a frame body having a rail and a shoji screen to which the aforementioned door roller of the present invention that runs on the rail is attached. According to the fitting of the present invention, it is possible to configure a fitting that can achieve the same effects as those of the door roller of the present invention described above. (8) In the fixture of the present invention, the frame of the shoji screen to which the door roller is attached is a lower frame, and the lower frame has a lower frame sighting surface portion, and the lower edges of a pair of side panel portions of the door roller frame of the door roller may be positioned at a position protruding downward from the position of the lower frame sighting surface portion. With this configuration, for example, when the shoji screen is placed upright on the floor or floor board before installation inside the frame, the roller frame abuts against the floor or floor board, preventing the bottom frame contact surface of the bottom frame from directly abutting against the floor or floor board such as a wooden block, and reducing the risk of deformation of the bottom frame contacting the floor or floor board, especially when the shoji screen is heavy. Also, even if the roller frame is positioned to protrude downward as described above, the axle rollers that roll on the rails can be made smaller in diameter, allowing the bottom frame to be positioned at a lower position. [Explanation of symbols]

[0019] 1...Sliding window (door), 2...Window frame (frame body), 21...Upper frame, 22...Lower frame, 221...Rail, 23...Vertical frame, 3 (3A, 3B)...Shoji, 32...Bottom frame, 321...Bottom frame facing surface, 322...Bottom frame facing surface, 35...Face material, 5...Door roller, 51...Door roller frame, 52...Outer frame, 521, 551...Side plate portion, 522, 552...End plate portion, 523, 524A, 524B, 532, 553...Axis hole, 53...Mounting member, 531, 5 61...Axle pin, 54...Reinforcing shaft, 541...Reinforcing material, 55 (55A, 55B)...Inner frame, 571...Bearing hole, 61...Wheel, 62...Bearing, 621...Outer ring, 622...Inner ring, 623...Rotating body, 63...Axle roller, 631...Axle portion, 632...Groove portion, 633...Side wall portion, 633A...Side surface, 634...Bottom wall portion, 71...Guide member, 711...Base portion, 712...Guide side portion, 712A...Guide side surface, 713...Mounting groove portion.

Claims

1. A door roller that allows a shoji screen to slide on a rail of a frame body in a building fixture, A door roller frame is attached to the frame of the shoji screen and has a pair of side plate portions facing each other at a distance, and a wheel is supported by the door roller frame, The wheels each include a pair of bearings provided on the pair of side plate portions and an axle roller that rolls on the rail, The axle rollers pass through the pair of bearings. A door roller characterized by:

2. The door roller according to claim 1, The diameter of the axle roller is smaller than the diameter of the pair of bearings. A door roller characterized by:

3. The door roller according to claim 1, The axle roller has a groove formed along the circumferential direction, in which the rail is disposed between the pair of bearings. A door roller characterized by:

4. The door roller according to claim 1, The door roller frame has at least two wheels arranged in parallel along the longitudinal direction of the rail, and is swingably connected to a mating member via a pivot pin along a direction perpendicular to the longitudinal direction of the rail at a position between the at least two wheels. A door roller characterized by:

5. The door roller according to claim 1, The door roller frame includes an outer frame attached to the frame of the shoji screen via an attachment member, and at least two inner frames arranged in parallel with the outer frame along the longitudinal direction of the rail, At least two of the wheels are arranged side by side along the longitudinal direction of the rail for each of the inner frames, The outer frame is swingably connected to the mounting member via a pivot pin that is located between the inner frames and extends in a direction perpendicular to the longitudinal direction of the rail, The inner frame is pivotally connected to the outer frame via a pivot pin along the perpendicular direction at a position between at least two of the wheels. A door roller characterized by:

6. The door roller according to claim 3, A resin guide member having a pair of guide side surfaces is attached to the roller frame and is disposed across the rail in a direction perpendicular to the longitudinal direction of the rail, The width between the pair of guide side surfaces is larger than the width of the rail and smaller than the width of the recessed groove. A door roller characterized by:

7. A frame body having a rail, and a shoji screen to which the door roller according to any one of claims 1 to 6 is attached, the shoji screen running on the rail. A fixture characterized by:

8. In the fitting according to claim 7, The frame of the shoji screen to which the door roller is attached is the lower frame, The bottom stile has a bottom stile sight surface, The lower edges of the pair of side plate portions of the door roller frame of the door roller are disposed at positions protruding downward from the position of the lower frame sight surface portion. A fixture characterized by:

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