Method for installing brake device for door opening / closing device, door opening / closing device, and structure for installing door opening / closing device

Abstract

To easily attach a braking device without enlarging the transom.SOLUTION: The opening / closing door device includes: a base part 41 that extends along the wall surface on the upper side of an opening part A to the width direction of the opening; and a door body 10 that takes an opening / closing action along the base part 41 to the width direction of the opening. The method of installing a braking device 50 for the opening / closing door device on the opening / closing door device so as to slow down the speed of the door body 10 includes: a penetration part forming step to form on the base part 41 penetration parts 41a11, 41b11, 41c11 that penetrate toward the wall surface; and an installing step to install a part of the braking device 50 inside the penetration parts 41a11, 41b11, 41c11.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to an installation method for a braking device for an opening / closing door device, such as a sliding door device, a hanging door device, a folding door device, a balanced door, etc., which opens and closes by moving a door body in the opening width direction, and also to an opening / closing door device and an opening / closing door device installation structure. [Background technology]

[0002] A conventional door opening / closing device, as described in Patent Document 1, for example, includes a support bracket provided on the wall surface above the opening in the opening width direction, a guide rail protruding from the support bracket and continuing in the opening width direction, a hoist that rolls on the rail, and a door body suspended from the hoist, and the opening is opened and closed by the door body that moves with the rolling of the hoist. In this door opening / closing device, the part above the door body that extends in the opening width direction is sometimes called a crosspiece. This opening and closing door device can automatically close the door by tilting the guide rail in the closing direction or by being equipped with a mechanism for pulling the door body in the closing direction with a wire. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-223117 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the above-mentioned conventional technology, when the door body is closed forcefully, it may come into strong contact with the opposing vertical frame on the closing side, generating a loud impact noise or vibration, or the door body may bounce back and open. Therefore, it is conceivable to install a braking device to reduce the closing speed of the door body, but the space inside the gate is limited in terms of the vertical dimension and the door thickness direction. In particular, when installing a braking device after the existing door opening and closing device, it is expected that the space inside the gate will be insufficient. [Means for solving the problem]

[0005] In view of the above problems, the present invention has the following configuration. A method for installing a brake device for an opening / closing door device, which is provided with a base that extends in the opening width direction along the upper wall surface of the opening, and a door body that opens and closes in the opening width direction along the base, and which installs a brake device for slowing down the speed of the door body, the method comprising the steps of: forming a through-hole forming process in which a through-hole that penetrates through the base toward the wall surface; and installing a part of the brake device inside the through-hole. Effect of the Invention

[0006] Since the present invention is configured as described above, the braking device can be easily installed without increasing the size of the frame. [Brief description of the drawings]

[0007] [Figure 1] 1 is a front view showing a state in which the door body is fully closed, regarding an opening / closing door device before application of a method for installing a braking device for an opening / closing door device according to the present invention. FIG. [Diagram 2] FIG. 4 is a front view showing the opening and closing door device in a fully open state. [Diagram 3] 2 is an enlarged front view of a main portion of the opening and closing door device in a fully closed state, in which a vertical intermediate portion is omitted and part of the door body is cut away. FIG. [Figure 4] FIG. 2 is a vertical cross-sectional view showing a main part of the opening and closing door device. [Diagram 5] 1 is a longitudinal cross-sectional view of a main portion of the opening and closing door device, showing a state in which a part of the transom and the door body are removed to expose a wall-side base member. FIG. [Figure 6]FIG. 11 is a longitudinal sectional view of a main portion of the opening and closing door device, showing a state in which a through-hole and a notch are provided in a wall-side base member and a wall portion. [Figure 7] FIG. 4 is a longitudinal cross-sectional view of a main portion showing a state in which a rail and a rotary damper unit are attached to a base. [Figure 8] FIG. 11 is a longitudinal cross-sectional view of a main portion showing a state in which a door body equipped with a rack is attached. [Figure 9] 1 is a longitudinal sectional view of a main part of the opening and closing door device after the installation method for a braking device for the opening and closing door device according to the present invention has been applied. FIG. [Figure 10] 1 is a front view showing a state in which the door body is fully closed in the opening / closing door device after the application of the installation method for the opening / closing door device braking device according to the present invention. FIG. [Figure 11] FIG. 4 is a front view showing the opening and closing door device in a fully open state. [Figure 12] 2 is an enlarged front view of a main portion of the opening and closing door device in a fully closed state, in which a vertical intermediate portion is omitted and part of the door body is cut away. FIG. [Figure 13] FIG. 4 is an enlarged front view showing the mounting portion of the rotary damper unit, with the front cover member omitted. [Figure 14] FIG. 13 is a view showing the rotary damper unit and the rack engaged with each other, as viewed from below. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] This embodiment discloses the following features. The first feature is a method for installing a brake device for an opening / closing door device, which is provided with a base extending in the opening width direction along the upper wall surface of the opening, and a door body which opens and closes in the opening width direction along the base, and which installs a brake device for slowing down the speed of the door body, and includes a through-hole forming step of forming a through-hole that penetrates through the base toward the wall surface, and an installation step of installing a part of the brake device inside the through-hole (see Figures 1 to 14).

[0009] As a second feature, the braking device comprises a rack fixed to the door body with its teeth facing the base, and a rotary damper unit having a braking gear meshed with the rack, and in the installation process, the teeth of the braking gear are protruded from the through-hole and the rotary damper unit is installed inside the through-hole (see Figures 7 to 9).

[0010] As a third feature, the method includes a step of replacing a door body not provided with the rack with a door body provided with the rack (see FIG. 8).

[0011] As a fourth feature, the opening / closing door device includes a rail that protrudes from the base and continues in the opening width direction, and a hoist that suspends the door body and rolls on the rail, and in the through-hole forming process, the through-hole is formed below the rail (see Figures 6 and 7).

[0012] As a fifth feature, the hoist is provided at the upper part of the door body on the door leading side, and a carriage is provided at the lower part of the door body on the door trailing side, and a lower rail for rolling the carriage is provided along the opening width direction on the lower fixed surface facing the carriage, and in the through-hole forming process, the through-hole is formed on the door trailing side of the hoist (see Figures 12 and 13).

[0013] As a sixth feature, the method includes a step of forming a notch portion communicating with the through portion in a wall portion on which the opening and closing door device is to be installed (see FIG. 6).

[0014] A seventh feature is an opening / closing door device comprising a base provided on a wall surface above an opening in the opening width direction, a door body that opens and closes in the opening width direction along the base, and a braking device that slows down the speed of the door body, wherein a through-hole that penetrates toward the wall surface is provided in the base, and a part of the braking device is provided inside the through-hole (see Figs. 8 to 14).

[0015] An eighth feature is an opening / closing door device installation structure comprising the above-mentioned opening / closing door device and a wall surface on which the opening / closing door device is installed, wherein a cutout portion communicating with the through-hole is provided in the wall surface, and a part of the braking device is provided in a range extending from the through-hole to the cutout portion (see Figures 8 to 9).

[0016] <Specific embodiment> Next, specific embodiments having the above-mentioned features will be described in detail with reference to the drawings. In the following description, the term "visible direction" refers to the width direction of the frame body (the left-right direction in FIG. 1). Also, the term "visible direction" refers to the direction of the frame thickness that is approximately perpendicular to the "visible direction". Additionally, "inside the frame" refers to the inside of the frame body, and "outside the frame" refers to the outside of the frame body. In addition, the "opening width direction" means the lateral width direction of the opening that is opened and closed by the door body, and in this embodiment, is the same direction as the "finding direction." In addition, the "door thickness direction" means the direction of the thickness of the door body, which in this embodiment is the same direction as the "visible direction."

[0017] 1 to 4 show an opening / closing door device 1 before application of a method for installing a braking device for an opening / closing door device according to the present invention. This opening and closing door device 1 is configured to open and close an opening A that penetrates a structural wall of a building or the like in a vertically long rectangular shape in the width direction by a door body 10 (see Figs. 1 and 2).

[0018] The opening and closing door device 1 is a sliding door device comprising a door body 10 that moves in the opening width direction to open and close the opening A, a door-end side vertical frame 20 facing the door end of the door body 10, a lower rail 31 that guides the door body 10 in the opening and closing direction from below, a transom 40 that covers the upper end side of the door body 10, and an automatic closing device 60 that automatically closes the door body 10 in the open state.

[0019] The door body 10 is a member that opens and closes in the opening width direction along a base portion 41 within a transom 40. The door body 10 includes a front plate 11 and a back plate 12 (see FIG. 4) that are spaced apart in the door thickness direction and are generally parallel to each other, and a plurality of frames that fix the front plate 11 and the back plate 12 together on the inside.

[0020] Of the multiple aggregates, the uppermost aggregate is a horizontal aggregate 13 that spans almost the entire length in the lateral direction of the door body 10. According to an example shown in Fig. 4, this horizontal aggregate 13 is formed in a crank-like vertical cross section, having a flat plate portion 13a that is almost horizontal in the door thickness direction, an upper protruding piece portion 13b that protrudes upward from the front end of this flat plate portion 13a, and a lower protruding piece portion 13c that protrudes downward from the back end of the flat plate portion 13a.

[0021] A hoist 14 that suspends the door body 10 and rolls on an upper rail 46 inside the transom 40 is supported on the upper surface of the flat plate portion 13a. An automatic closing device 60 (see FIG. 3) is provided inside the door body 10, which pulls the open door body 10 in the closing direction to perform the closing operation.

[0022] The hoist 14 is arranged at the upper part of the door body 10 on the door end side. The hoist 14 is supported on the upper end of the door front side of the door body 10 via a bracket 15 or the like so as to rotate around an axis in the door thickness direction. The hoist 14 protrudes upward from the door body 10 and engages with an upper rail 46.

[0023] In addition, a groove 16 that opens downward is provided in the door width direction at the lower end side of the door body 10 (see FIG. 3). A carriage 17 is supported in the groove 16 so as to protrude downward from the door trailing end part of the door body 10. This undercarriage 17 is rotatably supported by a bearing bracket 17 a fixed to the inner surface of the recessed groove 16 , and rolls on the lower rail 31 .

[0024] In addition, reference numeral 18 in Figs. 1 and 2 denotes a handle for opening and closing the door body 10, and reference numeral 19 denotes a keyhole or thumb turn of a locking device.

[0025] The door-end vertical frame 20 is a long, columnar member that continues in the vertical direction and is fixed to the wall surface of the main body so as to fit along the left edge of the opening A. This door-end vertical frame 20 has a continuous groove in the vertical direction on the surface facing the door body 10 so that the door end of the door body 10 fits into it.

[0026] The lower rail 31 is fixed to a lower immovable surface F (e.g., a floor surface, the ground, a door slide, etc.) of the door body 10. The lower rail 31 is formed in an elongated shape that protrudes from the lower immovable surface F and continues in the door body opening and closing direction. One end of the lower rail 31 is located closer to the tail end of the door body 10 when it is in the fully closed position (see Figure 1) and closer to the door tip than the lower carriage 17, and the other end of the lower rail 31 is located closer to the tail end of the door body 10 when it is in the fully open position (see Figure 2) and closer to the tail end than the lower carriage 17.

[0027] In addition, on the lower stationary surface F, a lower anti-sway member 32 is provided on the door tip side of the lower rail 31. This lower anti-sway member 32 is a roller supported on the lower stationary surface F so as to rotate around an axis in the vertical direction, and is loosely fitted in the recessed groove 16 to suppress the lower end side of the door body 10 from swinging in the door thickness direction.

[0028] The transom 40 is configured to be long in the width direction so as to cover the upper end portion of the door body 10 in the fully closed state over the entire length in the opening and closing direction. As shown in Figure 4, the transom 40 comprises a base 41 which supports the upper rail 46 and is attached to the wall W, and a front cover member 44 which is removably attached to the base 41 and covers the upper end of the door body 10 and the hoist 14, etc. from the front side.

[0029] In Figure 4, symbol 21 denotes a vertical frame member that covers the edge of the opening A on the door end side in the vertical direction, symbol 22 denotes an upper frame member that covers the upper edge of the opening A, and symbol 23 denotes an airtight material that elastically contacts the back surface of the upper end of the door body 10 in the opening and closing direction.

[0030] The base 41 is a member fixed in an elongated shape along the upper wall surface w1 of the opening A in the opening width direction. This base 41 is integrally provided with a rail side base member 41a to which the upper rail 46 is attached, a wall side base member 41b which is fastened to the wall portion W, and a top member 41c which covers the upper rail 46, the hoist 14, etc.

[0031] The rail side base member 41a has a substantially vertical flat plate-like base portion 41a1 to which the upper rail 46 is fastened. The base portion 41a1 is continuous in an elongated shape across the width of the opening.

[0032] The wall-side base member 41b is a member that extends above the opening A and continues in an elongated shape in the opening width direction so as to cover a part of the wall surface w1 on the outdoor side. The wall-side base member 41b is fixed to the wall portion W by well-known fixing means such as screws, rivets, or welding. In the illustrated example, reference numeral 41d denotes a fastening member such as a screw that fastens the overlapped wall side base member 41b and top member 41c to the wall surface w1, and reference numeral 41e denotes a substantially cylindrical anchor member embedded in the wall portion W to screw in the fastening member 41d (see FIGS. 4 to 9).

[0033] In addition, the top member 41c is formed in a roughly L-shaped vertical cross section and consists of a fastening piece portion 41c1 that is overlapped and fastened to the wall side base member 41b, and a top plate portion 41c2 that protrudes toward the outdoors from the upper end of the fastening piece portion 41c1, and is continuous in a long shape in the opening width direction. This top member 41c may be formed as an integral member with the wall side base member 41b or the rail side base member 41a.

[0034] The rail-side base member 41a and the wall-side base member 41b are integrally formed with the fastening piece 41c1 of the top member 41c sandwiched therebetween (see FIG. 4). The rail-side base member 41a and the top member 41c are detachably connected to the wall-side base member 41b. The means of connection may be, for example, screws, but it is also possible to use rivets that can be removed by cutting, or detachable fittings.

[0035] The wall W is a wall of the structure of a building or the like in which the opening and closing door device 1 is to be installed, and is made of concrete, mortar, etc. Anchors and the like (not shown) for fixing the wall side base member 41b, the upper frame member 22, etc. are embedded in the wall W as necessary.

[0036] In Figure 4, symbol 101 denotes the ceiling portion of the structure on which the opening / closing door device 1 is to be installed, symbol 102 denotes the outer wall of the same structure, symbol 103 denotes a batten-shaped member that is attached to the wall portion W so as to cover the upper end portion of the base portion 41, and symbol 104 denotes a filler that covers the batten-shaped member 103 and seals the gap between the lower end portion of the outer wall 102 and the top member 41c.

[0037] An upper rail 46 is provided on the base 41 so as to protrude from the base portion 41a1 and continue in the opening width direction. The upper rail 46 is a long member having an approximately L-shaped cross section that continues in the opening width direction, with one vertical end attached to the base plate portion 41a1 and the other end protruding horizontally from the base plate portion 41a1 on which the hoist 14 is placed and engaged (see Figure 4). The length of the upper rail 46 is set so as to include the range in which the hoist 14 moves in conjunction with the opening and closing operation of the door body 10. In the drawing, reference numeral 41f denotes a fastener (for example, a screw or a bolt) for fastening the upper rail 46 to the base plate portion 41a1.

[0038] The automatic closing device 60 is configured such that one end of a wire 61, the other end of which is fixed to a fixed portion within the eyelet 40, is wound up by a reel 62 having a power spring therein (see FIG. 3). According to this automatic closing device 60, the door body 10 in an open state automatically performs a closing operation from the fully open position (see FIG. 2) to the fully closed position (see FIG. 1).

[0039] 3, reference numeral 71 denotes a fastening portion which is a fixed portion to which one end of the wire 61 is fastened, reference numeral 72 denotes a vibration prevention member which prevents the upper side of the door body 10 from swinging in the thickness direction, and reference numeral 73 denotes a door stop member which receives the bracket 15 of the hoist 14 when the door body 10 is fully opened. The fastening portion 71, the vibration prevention member 72, and the door stop member 73 are configured as an integrated assembly and are fixed to the base member 41.

[0040] Next, a procedure for installing the brake device 50 for slowing down the closing speed of the door body 10 by applying the installation method for the brake device for the opening and closing door device according to the present invention to the opening and closing door device 1 having the above configuration will be described in detail.

[0041] First, the front cover member 44 of the opening and closing door device 1 is removed, and then the door body 10, the hoist 14, the rail side base member 41a, the top member 41c, etc. are removed to expose the wall side base member 41b (see FIG. 5).

[0042] Next, through-holes 41a11, 41b11, 41c11 penetrating toward the wall W are formed in the rail-side base member 41a, the wall-side base member 41b, and the top member 41c constituting the base 41, respectively (through-hole forming step).

[0043] In the through-portion forming step, the through-portion 41b11 in the wall-side base member 41b is provided at a position lower than the portion where the upper rail 46 is fixed, closer to the tail end side than the hoist 14, and immediately above the lower carriage 17 (see FIG. 12). The through-portion 41b11 is formed in a shape and size that allows the rotary damper unit 51, which will be described later, to be loosely inserted therein. The through portion 41b11 may be formed using a general cutting tool such as a grinder.

[0044] Furthermore, the removed rail-side base member 41a and top member 41c are provided with through-holes 41a11 and 41c11, respectively, at positions corresponding to the through-hole 41b11 of the wall-side base member 41b, the through-holes having a shape and size that allow the rotary damper unit 51 to be loosely inserted therein. These through-holes may also be formed using a general cutting tool, machine tool, or the like.

[0045] Next, the notch w2 communicating with the through-holes 41a11, 41b11, and 41c11 is formed in the wall W. The notch w2 may be formed by partially scraping out the concrete, mortar, or the like that constitutes the wall W using a general tool such as an electric hammer. The shape, size, depth, etc. of the cutout portion w2 are appropriately set so that the rotary damper unit 51 can be placed therein.

[0046] Next, as shown in FIG. 7, the top member 41c and the rail-side base member 41a in which the through-holes 41a11 and 41c11 are formed are attached to the wall-side base member 41b. The rail side base member 41a and the top member 41c may have the through-holes 41a11, 41c11 formed on-site, or may be replaced with those having the through-holes 41a11, 41c11 machined in advance at a factory or the like.

[0047] Next, the upper rail 46 is attached (screwed in the illustrated example) to the base plate portion 41a1, and the rotary damper unit 51, which is a part of the braking device 50, is installed inside the through-holes 41a11, 41b11, 41c11 and the cutout portion w2 (installation process).

[0048] The braking device 50 includes a rotary damper unit 51 having a brake gear 51c with teeth facing sideways, and a rack 52 provided on the door body 10 so as to mesh with the teeth of the brake gear 51c.

[0049] The rotary damper unit 51 comprises a casing 51a, a rotating shaft 51b protruding downward from the casing 51a, a braking gear 51c fixed to the rotating shaft 51b, a rotational resistance adjustment member 51d exposed on the upper side of the casing 51a, and a bracket 51f for attaching the casing 51a to a stationary portion, and is configured to adjust the rotational resistance of the rotating shaft 51b in accordance with the amount of rotation (rotation angle) of the rotational resistance adjustment member 51d.

[0050] Inside the casing 51a, there are provided a rotor that rotates integrally with the rotating shaft 51b, a viscous fluid that applies rotational resistance to the rotor, and a mechanism that adjusts the rotational resistance according to the amount of rotation of the rotational resistance adjustment member 51d. This mechanism applies resistance to the rotation of the rotating shaft 51b in one direction (in the illustrated example, the direction corresponding to the closing direction of the door body 10) and releases the resistance when the rotating shaft 51b rotates in the opposite direction. In addition, a general one-way type rotary damper mechanism can be applied to the basic structure inside the casing 51a.

[0051] The brake gear 51c is formed in the shape of a spur gear having teeth on its outer periphery. The teeth of the brake gear 51c mesh with the teeth of the rack 52.

[0052] The rotational resistance adjustment member 51d is located on the upper side of the casing 51a, and is formed in a generally disk shape that is radially larger than the brake gear 51c and also radially larger than the cylindrical portion of the casing 51a. The central axis of the rotational resistance adjusting member 51d is connected to a mechanism that adjusts the rotational resistance of the rotating shaft 51b within the casing 51a. A rotational resistance adjusting member 51d shown in FIG. 14 has an outer periphery formed in a polygonal shape, and has a scale 51d1 on the lower surface that indicates the amount of rotation. When the rotational resistance adjustment member 51d rotates a predetermined amount, it is engaged with a bracket 51f, so that the rotation angle is limited.

[0053] The rotary damper unit 51 configured as described above has a portion of the teeth of the braking gear 51c and a portion of the outer periphery of the rotational resistance adjustment member 51d protruding from the through-hole 41a11 to the outdoors, and is inserted into the space within the through-holes 41a11, 41b11, 41c11 and the cutout portion w2 (see Figures 7 and 8), and is fixed to a portion of the base portion 41a1 below the upper rail 46.

[0054] At this time, multiple spacers 53a are sandwiched between the base side fastening piece portion 51f2 of the bracket 51f and the rail side base member 41a, and a screwing member 51j (e.g., a screw or bolt) is inserted into the base side fastening piece portion 51f2 and the spacer 53a, and the threaded portion of this screwing member 51j is screwed into the base plate portion 41a1.

[0055] The spacer 53a is formed in a substantially flat plate shape so as to be inserted between the base portion 41a1 and the base side fastening piece 51f2 from the door leading side toward the door trailing side (see Figure 13), and has a notch 53a1 on the insertion direction side that fits with the screw shafts of multiple (two in the illustrated example) screw-fitting members 51j, and has a positioning piece 53a2 bent into an L shape at the end opposite the insertion direction so as to abut the end of the base side fastening piece 51f2.

[0056] After the rotary damper unit 51 is installed, the door body 10' is installed by hanging the hoist 14 on the upper rail 46 and placing the lower carriage 17 on the lower rail 31. The door body 10' may be an improved version of the door body 10 removed in the above process, or may be one produced in advance in a factory, etc.

[0057] The door body 10' is configured by attaching a rack 52 to the door body 10 via a bracket 54. That is, the door body 10 not having the rack 52 is replaced with a door body 10 ′ having the rack 52 .

[0058] The rack 52 is fixed to the upper side of the rear surface of the door body 10', closer to the door tail than the hoist 14, with the teeth arranged in a straight line facing the base plate portion 41a1 of the base 41. More specifically, a bracket 54 is fixed to the upper end of the door body 10', continuing in the width direction of the opening, and a rack 52 is fitted and fixed to this bracket 54 (see FIG. 9). As another example, the rack 52 may be fixed directly to the upper end of the door body 10', or the rack 52 may be fixed directly or indirectly to the rear surface of the door body 10'.

[0059] When the door body 10' is attached, the rack 52 meshes with the brake gear 51c. The degree of this meshing can be easily adjusted by changing the number of spacers 53a.

[0060] Then, the front cover member 44 is attached to the outdoor end of the top member 41c to complete the opening / closing door device 1' equipped with the braking device 50. At the same time, this opening / closing door device 1' is installed on the wall part W to configure the opening / closing device installation structure.

[0061] Next, the characteristic functions and effects of the above-mentioned embodiment will be described in detail. According to the above-mentioned method for installing the braking device for an opening / closing door device, the braking device 50 can be easily installed on an existing opening / closing door device that does not have the braking device 50 without increasing the size of the interlock 40.

[0062] That is, according to the above embodiment, the rotary damper unit 51 and the rack 52 are arranged horizontally, and a part of the rotary damper unit 51 is arranged within the through-holes 41a11, 41b11, 41c11 and the cut-out portion w2, so there is no need to secure a large installation space for the rotary damper unit 51 within the interlocking member 40, and there is no need to enlarge the interlocking member 40 in the vertical direction.

[0063] Moreover, in the above-mentioned method of installing the braking device for the opening and closing door device, the members constituting the existing opening and closing door device 1 can be used as they are.

[0064] In addition, since no hoist is provided on the door end side of the door body 10, the braking device 50 can be installed without having to consider interference with the door end side hoist, and the maintenance of the braking device 50 is also easy.

[0065] <Modification> According to the above embodiment, a notch w2 is formed in the wall W and a part of the rotary damper unit 51 is inserted into this notch w2. However, as another example, if there is already space on the back side (indoor side) of the base 41 due to on-site conditions, etc., the step of forming the notch w2 may be omitted and a part of the rotary damper unit 51 may be inserted into this space.

[0066] As an additional configuration to the above embodiment, a concave case may be inserted into the notch w2 so as to cover the inner surface of the notch w2, and a part of the rotary damper unit 51 may be inserted into this case. According to this configuration, the case can prevent chips, condensation water, foreign matter, etc. generated on the wall W side from adhering to the braking device 50.

[0067] In addition, according to the above embodiment, the rotary damper unit 51 is fixed to the base 4, but as another example, it is also possible to fix the rotary damper unit 51 to the wall W (more specifically, the wall surface w1, the inner surface of the cutout portion w2, etc.).

[0068] Furthermore, according to the above opening and closing door device 1' (see FIG. 10), the rotary damper unit 51 and the notch w2 are arranged corresponding to the door tail side of the door body 10 in the closed state, but the rotary damper unit 51 and the notch w2 can also be arranged corresponding to the center or door tip side of the door body 10 in the closed state, so long as they are located closer to the door tail side than the hoist 14. In this case, the mounting position of the rack 52 in the width direction is also changed so as to correspond to the rotary damper unit 51.

[0069] In addition, in the above embodiment, one each of the rotary damper unit 51 and the rack 52 is provided, but as another example, it is possible to provide a plurality of either one or both of them in the opening width direction. In this way, the braking range can be extended, and more suitable closing operation can be achieved, for example, by providing two rotary damper units 51 at intervals in the opening width direction, applying braking in the early stage of the closing operation, releasing the braking in the middle stage, and applying braking again in the later stage. When a plurality of rotary damper units 51 are provided in the opening width direction, a plurality of through-holes 41a11, 41b11, 41c11 and notches w2 may also be provided in the opening width direction in correspondence with the plurality of rotary damper units 51.

[0070] Furthermore, according to the above embodiment, the rotary damper unit 51 is installed in the through-holes 41a11, 41b11, 41c11 and the cutout portion w2, and a rack 52 is provided on the door body 10. However, as another example, it is also possible to provide a rack 52 in the through-holes 41a11, 41b11, 41c11 and the cutout portion w2, and to provide the rotary damper unit 51 on the door body 10.

[0071] In addition, according to the above embodiment, the braking device 50 is provided to slow down the closing speed of the door body 10, but as another example, it is also possible to slow down the opening speed of the door body 10, or to slow down both the closing speed and opening speed of the door body 10. In order to reduce the opening speed of the door body 10, a one-way type rotary damper mechanism that generates rotational resistance in the opposite direction to that described above may be used in the rotary damper unit 51. In order to reduce both the closing speed and the opening speed of the door body 10, a rotary damper mechanism that generates rotational resistance in both directions may be used in the rotary damper unit 51.

[0072] In addition, before the braking device 50 is installed, the opening and closing door device 1 may be provided with a braking device other than the braking device 50 of the above-mentioned configuration, and in this case, the other braking device may be removed, or the other braking device may be left in place and used in combination with the braking device 50.

[0073] Furthermore, according to the above embodiment, a sliding door device is configured which guides the door body 10 by the upper rail 46 and the lower rail 31 etc. to open and close in the opening width direction, but the above-mentioned method of installing the braking device for the opening and closing door device, the opening and closing door device and the opening and closing door device installation structure etc. can be applied to opening and closing door devices other than the illustrated example which open and close by moving the door body in the opening width direction, such as a sliding door device which guides the door body by only one of the upper rail and the lower rail to open and close in the opening width direction, a folding door device which opens and closes by folding and unfolding the door body, and a balanced door device which opens and closes by moving the door body on the door front side in the opening width direction while rotating it.

[0074] Furthermore, the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the gist of the present invention. [Explanation of symbols]

[0075] 1,1': Door opening and closing device 10,10': Door body 14: Hanging wheel 17: Get off 31: Lower rail 40: No Eyes 41: Base 41a: Rail side base member 41a1: Board part 41b: Wall side base member 41c: Top part 41a11, 41b11, 41c11: Penetration part 46: Upper rail 50: Braking device 51: Rotary damper unit 52: Rack Wall: W w1: Wall w2: Notch

Claims

1. A method for installing a brake device for an opening / closing door device, which is provided with a base extending in the opening width direction along the upper wall surface of the opening and a door body that opens and closes in the opening width direction along the base, and which installs a brake device for slowing down the speed of the door body, A method for installing a braking device for an opening / closing door apparatus, comprising: a through-hole forming step of forming a through-hole in the base portion that penetrates toward the wall surface; and an installation step of installing a part of the braking device inside the through-hole.

2. The braking device includes a rack fixed to the door body with a toothed portion facing the base, and a rotary damper unit having a braking gear meshed with the rack, 2. The method for installing a braking device for an opening / closing door apparatus according to claim 1, wherein in the installing step, the rotary damper unit is installed inside the through-hole with the teeth of the braking gear protruding from the through-hole.

3. 3. The method for installing a braking device for an opening and closing door apparatus according to claim 2, further comprising a step of replacing a door body not provided with the rack with a door body provided with the rack.

4. The opening and closing door device includes a rail that protrudes from the base and continues in the opening width direction, and a hoist that suspends the door body and rolls on the rail, 4. The method for installing a braking device for an opening and closing door apparatus according to claim 1, wherein in the through-hole forming step, the through-hole is formed below the rail.

5. The hoist is provided at the upper part of the door body on the door tip side, and a lower carriage is provided at the lower part of the door body on the door tail side. A lower rail for rolling the lower carriage is provided in the opening width direction on the lower stationary surface facing the lower carriage, 5. The method for installing a braking device for an opening and closing door apparatus according to claim 4, wherein in the through-hole forming step, the through-hole is formed on the door tail side of the hoist.

6. The method for installing a braking device for an opening and closing door device according to any one of claims 1 to 5, further comprising a step of forming a notch in a wall portion on which the opening and closing door device is to be installed, the notch communicating with the through-hole.

7. A structure for installing an opening / closing door device comprising an opening / closing door device and a wall surface on which the opening / closing door device is installed, The opening and closing door device includes a base provided on the wall surface on the upper side of the opening in the opening width direction, a door body that opens and closes in the opening width direction along the base, and a braking device that reduces the speed of the door body, The base portion is provided with a through-hole that penetrates toward the wall surface, A part of the braking device is provided inside the through-hole, The wall surface is provided with a notch portion communicating with the through-hole, A structure for installing an opening / closing door device, characterized in that a portion of the braking device is provided in a range extending from the through portion to the notch portion.

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