Door opening and closing device

Abstract

To configure such that an amount of engagement between a braking gear and a rack is made adjustable as needed.SOLUTION: An opening / closing door device, including a door body 10 that opens / closes while moving in the opening width direction, and a braking device 50 that reduces the speed of the door body 10, in which the braking device 50 includes a rotary damper unit 51 provided to either one of the door body 10 and a stationary portion, and a rack 52 provided to the other of the door body and the stationary portion so as to mesh with a braking gear 51c of the rotary damper unit 51, and a meshing amount adjusting mechanism 53 for adjusting the meshing amount between the braking gear 51c and the rack 52 is provided.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an opening and closing door device, such as a sliding door device, a hanging door device, a folding door device, or a balance door, which opens and closes by moving a door body in the opening width direction. [Background technology]

[0002] Conventionally, this type of invention includes a door body that is suspended by a hoist and moves in the opening width direction while rotating to open and close, and a braking device that applies resistance to the closing movement of the door body, as described in Patent Document 1. The braking device includes a large-diameter braking gear with teeth facing downward, and a rack fixed to the door body so as to mesh with the braking gear. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-17444 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the above-mentioned conventional technology, the amount of meshing between the brake gear and the rack can vary due to dimensional errors of various parts, etc. If the amount of meshing is too small, there is a risk of tooth skipping occurring, and if the amount of meshing is too large, there is a risk of the rotational resistance of the brake gear becoming too large. [Means for solving the problem]

[0005] In view of the above problems, the present invention has the following configuration. In an opening and closing door device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, the braking device comprises a rotary damper unit provided on one of the door body and the immovable part, and a rack provided on the other of the rotary damper unit so as to mesh with the braking gear of the rotary damper unit, and a meshing amount adjustment mechanism that adjusts the meshing amount between the braking gear and the rack. The rack is provided on the door body, and the rotary damper unit is provided on the immovable portion. The meshing amount adjustment mechanism is capable of adjusting the position of the rotary damper unit relative to the immovable portion, and includes a spacer sandwiched between the immovable portion and the rotary damper unit. The position of the rotary damper unit in the door thickness direction is adjusted by attaching and detaching the spacer. A door opening and closing device characterized by the above. The present invention also has the following configuration. 1. An opening and closing door device comprising a door body that opens and closes while moving in an opening width direction, and a braking device that decelerates the speed of the door body, wherein the braking device comprises a rotary damper unit provided on one of the door body and a stationary part, and a rack provided on the other of the door body and the stationary part so as to mesh with a braking gear of the rotary damper unit, and an engagement amount adjustment mechanism that adjusts the engagement amount between the braking gear and the rack is provided, the rack is provided on the door body, and the rotary damper unit is provided on the stationary part, and the engagement amount adjustment mechanism makes it possible to adjust the position of the rotary damper unit with respect to the stationary part, and comprises an inclined bracket that extends so as to be inclined with respect to the extension direction of the rack and is fixed to the stationary part, the inclined bracket has a plurality of fastening parts spaced apart in the extension direction, and the rotary damper unit is selectively fastened to the plurality of fastening parts. The present invention also has the following configuration. an opening and closing door device comprising a door body that opens and closes while moving in an opening width direction, and a braking device that decelerates the speed of the door body, wherein the braking device comprises a rotary damper unit provided on one of the door body and a stationary part, and a rack provided on the other of the one and meshing with a braking gear of the rotary damper unit, and an engagement amount adjustment mechanism that adjusts the engagement amount between the braking gear and the rack is provided, the rack is provided on the door body, and the rotary damper unit is provided on the stationary part, and the engagement amount adjustment mechanism makes it possible to adjust the position of the rotary damper unit with respect to the stationary part, and the rotary damper unit is supported so as to be rotatable with respect to the stationary part, and the rotation of the rotary damper unit changes the engagement amount between the braking gear and the rack. The present invention also has the following configuration. 1. An opening and closing door device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, wherein the braking device comprises a rotary damper unit provided on one of the door body and a stationary part, and a rack provided on the other of the door body and stationary part so as to mesh with a braking gear of the rotary damper unit, and an engagement amount adjustment mechanism that adjusts the engagement amount between the braking gear and the rack is provided, the rack is provided on the door body, and the rotary damper unit is provided on the stationary part, and the engagement amount adjustment mechanism makes it possible to adjust the position of the rotary damper unit with respect to the stationary part, and comprises a base fixed to the stationary part, and a sliding part supported by the base so as to slide in a direction toward and away from the rack, and the sliding part is configured integrally with the rotary damper unit. The present invention also has the following configuration. an opening and closing door device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, wherein the braking device comprises a rotary damper unit provided on one of the door body and a stationary part, and a rack provided on the other of the one and meshing with a braking gear of the rotary damper unit, and an engagement amount adjustment mechanism that adjusts the engagement amount of the braking gear and the rack is provided, the rack is provided on the door body, and the rotary damper unit is provided on the stationary part, the braking gear of the rotary damper unit is provided with its teeth facing sideways, and the engagement amount adjustment mechanism makes it possible to adjust the position of the rotary damper unit relative to the stationary part in the forward direction. [Effects of the Invention]

[0006] Since the present invention is configured as described above, it is possible to appropriately adjust the amount of meshing between the brake gear and the rack. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a front view showing an example of an opening and closing door device according to the present invention, in which a door body is fully closed. [Figure 2] 1 is a front view showing an example of an opening and closing door device according to the present invention, in which a door body is fully opened. [Figure 3] 1 is an enlarged front view of a main part of the opening and closing door device in a fully closed state, in which the vertical intermediate part is omitted and part of the door body is cut away. [Figure 4] FIG. 2 is an enlarged front view showing the mounting portion of the rotary damper unit, with the front cover member omitted. [Figure 5] 10 is a view of the opening and closing door device, showing a state in which the rotary damper unit and the rack are engaged, as viewed from below. FIG. [Figure 6]FIG. 2 is a vertical cross-sectional view of a main part of the opening and closing door device. [Figure 7] FIG. 10 is a view of another example of the opening and closing door device according to the present invention, showing a state in which the rotary damper unit and the rack are engaged, as viewed from below. [Figure 8] FIG. 8 is a longitudinal sectional view of a main part of the switching device shown in FIG. [Figure 9] FIG. 10 is a view of another example of the opening and closing door device according to the present invention, showing a state in which the rotary damper unit and the rack are engaged, as viewed from below. [Figure 10] FIG. 10 is a longitudinal sectional view of a main part of the opening and closing device shown in FIG. [Figure 11] FIG. 10 is a view of another example of the opening and closing door device according to the present invention, showing a state in which the rotary damper unit and the rack are engaged, as viewed from below. [Figure 12] FIG. 12 is a longitudinal sectional view of a main part of the switching device shown in FIG. [Figure 13] FIG. 10 is a view of another example of the opening and closing door device according to the present invention, showing a state in which the rotary damper unit and the rack are engaged, as viewed from below. [Figure 14] FIG. 14 is a longitudinal sectional view of a main part of the opening and closing device shown in FIG. [Figure 15] FIG. 10 is a view of another example of the opening and closing door device according to the present invention, showing a state in which the rotary damper unit and the rack are engaged, as viewed from below. [Figure 16] FIG. 16 is a longitudinal sectional view of a main part of the opening and closing device shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] This embodiment discloses the following features. The first feature is an opening and closing door device that has a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, wherein the braking device has a rotary damper unit provided on one of the door body and the immovable part, and a rack provided on the other of the rotary damper unit so as to mesh with the braking gear of the rotary damper unit, and a meshing amount adjustment mechanism that adjusts the meshing amount between the braking gear and the rack (see Figures 1 to 16).

[0009] The second feature is an opening and closing door device in which the rack is provided on the door body and the rotary damper unit is provided on an immovable portion, and the engagement amount adjustment mechanism makes it possible to adjust the position of the rotary damper unit relative to the immovable portion (see Figures 6 to 16).

[0010] As a third feature, the engagement adjustment mechanism includes a spacer sandwiched between the fixed portion and the rotary damper unit, and the position of the rotary damper unit in the door thickness direction is adjusted by attaching and detaching the spacer (see Figures 4 to 6).

[0011] As a fourth feature, the meshing amount adjustment mechanism includes an inclined bracket that extends at an angle relative to the extension direction of the rack and is fixed to the immovable portion, the inclined bracket having a plurality of fastening attachment portions spaced apart in the extension direction, and the rotary damper unit is selectively fastened to the plurality of fastening attachment portions (see Figures 7 and 8).

[0012] As a fifth feature, the meshing amount adjustment mechanism supports the rotary damper unit so that it can rotate relative to the immovable portion, and the rotation of the rotary damper unit changes the meshing amount between the brake gear and the rack (see Figures 9 to 12).

[0013] As a sixth feature, the rotary damper unit includes a rotating bracket that rotates relative to the immovable portion, and the rotating bracket has an elongated hole that is aligned with the direction of rotation, and a fastener that screws into the immovable portion is inserted into the elongated hole (see Figures 9 to 12).

[0014] As a seventh feature, the meshing amount adjustment mechanism comprises a base fixed to the immovable portion and a slide portion supported by the base so as to slide in a direction toward or away from the rack, and the slide portion is configured integrally with the rotary damper unit (see Figures 13 to 16).

[0015] As an eighth feature, the slide portion is provided so as to slide in an inclined direction relative to the extending direction of the rack (see FIGS. 15 and 16).

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

[0017] The opening and closing door device 1 is configured to open and close an opening A that penetrates a wall portion of a building or the like in a vertically long rectangular shape in the width direction (see Figs. 1 and 2). This 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-front vertical frame 20 facing the door front of the door body 10, a lower rail 31 that guides the door body 10 in the opening and closing direction from below, and a transom 40 that covers the upper end of the door body 10. A braking device 50 that slows down the closing speed of the door body 10 is provided inside the transom 40. In addition, an automatic closing device 60 is provided at the end of the door at the top inside the door body 10 to pull the door body 10 in the closing direction when it is in an open state to automatically close it (see Figure 3).

[0018] The door body 10 comprises a front panel 11 and a back panel 12 (see FIG. 6) that are spaced apart in the door thickness direction and are generally parallel to each other, and a plurality of frames that secure the front panel 11 and the back panel 12 together on the inside.

[0019] Of the plurality of aggregates, the aggregate at the uppermost end is a horizontal aggregate 13 that extends over substantially the entire width of the door body 10. According to an example shown in Figure 6, this horizontal aggregate 13 is formed in a crank-like shape in vertical cross section. The upper surface of this horizontal frame 13 is supported via brackets 54 to support a rack 52 that constitutes the braking device 50, a hoist 14 that suspends the door body 10 and rolls on the upper rail 46 within the transom 40, and other components.

[0020] The hoist 14 is supported at the upper end of the door body 10 on the door tip side via a bracket 15 or the like so that it rotates around an axis in the door thickness direction, and protrudes upward from the door body 10 and engages freely with the upper rail 46.

[0021] In addition, a recessed groove 16 that opens downward and extends across the width of the door is provided at the lower end of the door body 10 (see Figure 3). A carriage 17 is supported in this recessed groove 16 so as to protrude downward from the door trailing edge of the door body 10. This lower car 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 .

[0022] 1 and 2, reference numeral 18 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.

[0023] 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 frame 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 can be fitted into it.

[0024] The lower rail 31 is fixed to a lower stationary surface F (for example, a floor, the ground, or a door slide) of the door body 10. The lower rail 31 protrudes from the lower stationary surface F and extends in a continuous, long shape in the door body opening and closing direction. One end of this 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.

[0025] Furthermore, on the lower stationary surface F, a lower anti-sway member 32 is provided closer to the door tip than 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 into the recessed groove 16 to prevent the lower end of the door body 10 from swinging in the door thickness direction.

[0026] 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 6, this transom 40 comprises a base member 41 that supports the upper rail 46 and rotary damper unit 51, etc., a fastening bracket 42 for fastening this base member 41 to the wall W, a top plate 43 that covers the upper end of the door body 10 and the upper rail 46, etc., a removable front cover member 44 that covers the upper end side of the door body 10 and the hoist 14, etc. from the front side, and a back cover member 45 that covers the rotary damper unit 51 from the back (indoor side).

[0027] In Figure 6, symbol 21 denotes a vertical frame member that covers the edge of the door tail side of the opening A 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.

[0028] The base member 41 is located at a predetermined distance from the rear side (indoor side) of the door body 10 when it is in the fully closed position. The base member 41 has a substantially vertical, flat base plate portion 41a. The base plate portion 41a is continuous and elongated across the width of the opening. An upper rail 46 is fastened to the front surface of the base plate portion 41a. A notch 41a1 is provided on the surface of the base plate portion 41a below the upper rail 46. A rotary damper unit 51 is attached to this base plate portion 41a.

[0029] The upper end side of the base member 41 is bent into an appropriate shape and is fixed integrally to the fastening bracket 42 and the top plate 43, etc. The fastening bracket 42 is then fixed to the wall portion W. Therefore, this base member 41 functions as an immovable part that is immovable relative to the door body 10 that moves in the opening width direction. The means for fastening the base member 41 to the fastening bracket 42 or the like, and the means for fixing the fastening bracket 42 to the wall W may be well-known fastening means such as screws, rivets, welding, or the like.

[0030] The top plate 43 and the front cover member 44 are provided elongated in the opening and closing direction so as to cover the upper end side of the door body 10 in the fully closed state.

[0031] The rear cover member 45 is provided on the rear side (back side) of the braking device 50 in the opening and closing direction, and prevents foreign matter resulting from the collapse from adhering to the braking device 50 (described later) when the surface of the wall W collapses due to aging or the like (see Figure 6). The rear cover member 45 in the illustrated example is formed in an inverted L-shape in vertical cross section, covering the rear portion of the rotary damper unit 51 from the rear to the top side. The rear cover member 45 may be provided at least partially so as to be positioned on the rear side of the braking device 50, but may also be provided over the entire length of the interlock 40 in the lateral direction.

[0032] In addition, some or all of the multiple components that make up the outer part of the transom 40, such as the base member 41, the fastening bracket 42, the top plate 43, the front cover member 44, and the back cover member 45, can be constructed as a single unit.

[0033] 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. A cutout w1 is partially formed in this wall W so as to fit into the rear cover member 45. It is also possible to omit the cutout w1 by reducing the amount of protrusion of the rear cover member 45 toward the indoor side.

[0034] An upper rail 46 is provided on the base member 41 so as to protrude from the base member 41 to one side in the door thickness direction (to the outside side in the illustrated example) and to continue in the opening width direction. The upper rail 46 is a long member with an approximately L-shaped longitudinal cross section that continues in the opening width direction, with one vertical end attached to the base member 41 and the other end protruding horizontally from the base member 41 on which the hoist 14 is placed and engaged (see Figure 6). The length of the upper rail 46 is set so as to include the range in which the hoist 14 moves as the door body 10 opens and closes.

[0035] The braking device 50 comprises a rotary damper unit 51 mounted on a stationary portion (base member 41 in the illustrated example) with the teeth of the braking gear 51c facing sideways, and a rack 52 mounted on the door body 10 so as to mesh with the teeth of the braking gear 51c. Between the rotary damper unit 51 and the stationary portion, a meshing amount adjusting mechanism 53 for adjusting the meshing amount between the braking gear 51c and the rack 52 is provided.

[0036] The rotary damper unit 51 includes 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 position, and is configured to adjust the rotational resistance of the rotating shaft 51b according to the amount of rotation (rotation angle) of the rotational resistance adjustment member 51d (see Figures 4 to 6).

[0037] Inside the casing 51a are provided a rotor that rotates integrally with the rotary 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 rotary 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 rotary shaft 51b rotates in the opposite direction. A one-way type rotary damper mechanism with a well-known structure can be applied to these components.

[0038] 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.

[0039] The center of the rotational resistance adjustment member 51d is connected to a rotational resistance adjustment mechanism (not shown) inside the casing 51a via a shaft-shaped member. The rotational resistance adjustment member 51d is configured to gradually increase the rotational resistance of the rotating shaft 51b according to the amount of rotation in one direction, and to gradually decrease the rotational resistance of the rotating shaft 51b according to the amount of rotation in the other direction. The rotational resistance adjusting member 51d is located above the casing 51a and is formed in a generally disk shape that is radially larger than the brake gear 51c and the cylindrical outer circumferential surface of the casing 51a.

[0040] In FIG. 5, reference numeral 51d1 denotes a scale that indicates the amount of rotation of the rotational resistance adjusting member 51d. Furthermore, reference numeral 51d4 denotes a protruding restricting portion provided on the rotational resistance adjusting member 51d. When the rotational resistance adjusting member 51d rotates a predetermined amount, this restricting portion 51d4 abuts against the bracket 51f, restricting the amount of rotation of the rotational resistance adjusting member 51d.

[0041] The bracket 51f integrally includes a case-side fastening piece 51f1 fastened to the casing 51a and a base-side fastening piece 51f2 fastened to the base member 41 via an engagement amount adjustment mechanism 53 (see FIGS. 4 to 7).

[0042] In FIG. 4, reference numeral 51g denotes a cylindrical spacer for ensuring a gap between the casing 51a and the bracket 51f that allows the rotational resistance adjusting member 51d to rotate. Furthermore, reference numeral 51h denotes a fastener (for example, a bolt, screw, rivet, or the like) that is inserted through the flange-like portion of the casing 51a and the spacer 51g and fastened to the bracket 51f, thereby fixing the casing 51a to the bracket 51f.

[0043] A plurality of screw members 51j are inserted into the base-side fastening piece 51f2. These screw members 51j are fitted into spacers 53a (described later) and are screwed into the base plate portion 41a of the base member 41.

[0044] 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 brake gear 51c. More specifically, as shown in FIG. 6, 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. As another example, the rack 52 may be fixed directly to the upper end of the door body 10, or may be fixed directly or indirectly to the rear surface of the door body 10, etc.

[0045] The meshing amount adjusting mechanism 53 is configured by sandwiching one or more spacers 53a between the base member 41, which is an immovable part, and the bracket 51f of the rotary damper unit 51 (see FIGS. 4 to 6). This meshing amount adjustment mechanism 53 adjusts the position of the rotary damper unit 51 in the projection direction by attaching and detaching a spacer 53a.

[0046] The spacer 53a is formed in an approximately flat plate shape so that it can be inserted between the base member 41 and the base side fastening piece 51f2 of the bracket 51f from the door leading side toward the door trailing side, and has a notch 53a1 on the insertion side that fits onto the screw shafts of multiple (two in the illustrated example) screw-engaging members 51j, and has a positioning piece 53a2 bent into an L shape at the end opposite the insertion direction so as to contact the end of the base side fastening piece 51f2 (see Figure 4).

[0047] The automatic closing device 60 is configured so that one end of a wire 61 is fixed to a fixed portion inside the eyelet 40, and the other end of the wire 61 is wound up by a reel 62 having a power spring inside (see FIG. 3). According to this automatic closing device 60, the door body 10 in an open state automatically closes from the fully open position (see FIG. 2) to the fully closed position (see FIG. 1).

[0048] 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 vibrating 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 open. The fastening portion 71, vibration prevention member 72, and door stop member 73 are configured as an integrated assembly and fixed to the base member 41.

[0049] Therefore, according to the opening and closing door device 1 configured as above, the degree of meshing between the brake gear 51c and the rack 52 can be easily adjusted by inserting or removing the spacer 53a. In other words, by loosening the screw member 51j and removing an appropriate number of spacers 53a, the gap between the brake gear 51c and the rack 52 is reduced, allowing them to mesh more deeply; conversely, by increasing the number of spacers 53a, the gap between the brake gear 51c and the rack 52 is increased, allowing them to mesh more shallowly. By making such an adjustment, it is possible to prevent the resistance caused by the meshing of the brake gear 51c and the rack 52 from becoming too large and to prevent tooth jumping between the brake gear 51c and the rack 52.

[0050] <Second embodiment> Next, other embodiments of the present invention will be described. In the embodiments shown below, the meshing amount adjustment mechanism 53 of the braking device 50 in the above opening and closing door device 1 is changed to a meshing amount adjustment mechanism of a different configuration, so the changed parts will be mainly described in detail. Furthermore, in the following description, parts that function in substantially the same way as in the above embodiment will be given the same reference numerals, and detailed description will be omitted as appropriate.

[0051] The meshing amount adjustment mechanism 55 shown in Figures 7 and 8 has an inclined bracket 55a that extends at an angle relative to the extension direction of the rack 52 and is fixed to the base member 41, which is an immovable part, and the position of the rotary damper unit 51 in the projected direction changes depending on the attachment position of the bracket 51i relative to this inclined bracket 55a.

[0052] The base member 47 to which the inclined bracket 55a is attached has a base plate portion 47a on the upper side to which the upper rail 46 is attached, and below this base plate portion 47a has a fastening piece portion 47b for fastening the rotary damper unit 51 (see Figure 8).

[0053] The base plate portion 47a is formed in the shape of a long vertical flat plate along the upper rail 46. The fastening piece 47b is formed in a vertical flat plate shape by bending the lower side of the base plate 47a in a crank shape toward the indoor side. The fastening piece 47b may be formed partially in the opening width direction or may be formed over the entire length of the base plate 47a.

[0054] The inclined bracket 55a has one end side and the other end side of an inclined piece 55a1 inclined with respect to the extending direction of the rack 52, and is fastened to the base member 47 by fasteners (for example, screws, bolts, rivets, etc.).

[0055] The inclined piece 55a1 is provided with a plurality of fastening portions 55a11 spaced apart in the extending direction thereof. Each fastening portion 55a11 is a screw hole into which a threaded portion of a detachable fastener 55b (for example, a screw or a bolt) inserted into the bracket 51i can be screwed.

[0056] The bracket 51i integrally has a horizontal case-side fastening piece 51i1 that is fastened to the casing 51a of the rotary damper unit 51, and a vertical base-side fastening piece 51i2 that is fastened to the base plate portion 47a via an engagement amount adjustment mechanism 55. The base-side fastening piece 51i2 has an elongated hole 51i21 for inserting the fastener 55b along the fastening receiving portion 55a11. Therefore, the fastener 55b can move along the elongated hole 51i21 in the extending direction of the inclined bracket 55a.

[0057] The rotary damper unit 51 having the bracket 51i is selectively fastened to a plurality of fastening portions 55a11 (see FIG. 7).

[0058] Therefore, according to the meshing amount adjustment mechanism 55 shown in Figures 7 and 8, by selectively fastening the bracket 51i to the multiple fastening portions 55a11, the position of the rotary damper unit 51 in the direction approaching or moving away from the rack 52 can be adjusted with high precision. That is, if multiple selectable fastening holes were provided in a prospective direction perpendicular to the rack 52 (the left-right direction in FIG. 7), the pitch between adjacent fastening holes would be too wide, making it impossible to precisely adjust the position of the rotary damper unit 51. However, with the above configuration, multiple fastening portions 55a11 are provided on the inclined piece 55a1, and moreover, the fasteners 55b that fasten the rotary damper unit 51 to the inclined bracket 55a are movable within the elongated holes 51i21, so that the position of the rotary damper unit 51 can be precisely adjusted.

[0059] In the example shown in FIG. 7, the rotational resistance adjusting member 51d is omitted, but it is possible to provide the rotational resistance adjusting member 51d in the same manner as in the above embodiment.

[0060] <Third embodiment> The meshing amount adjustment mechanism 56 shown in Figures 9 and 10 supports the rotary damper unit 51 so that it can rotate relative to the base member 48, which is an immovable part, and the rotation of the rotary damper unit 51 changes the meshing amount between the brake gear 51c and the rack 52.

[0061] The base member 48 has a substantially horizontal fastening piece 48a at its lower end. The rotary damper unit 51 of the meshing amount adjusting mechanism 56 has a casing 51a fixed to the fixing piece 48a by a rotating bracket 51k (see FIG. 10).

[0062] The pivot bracket 51k is a flat plate-shaped member that is placed over the fastening piece 48a, and the casing 51a is fastened to one end of the bracket 51k. The rotating bracket 51k is provided with a circular shaft support hole 51k1 and a substantially arc-shaped elongated hole 51k2 that extends along the direction of rotation around the shaft support hole 51k1.

[0063] A shaft-shaped member 51k3, one end of which is fixed to the fastening piece 48a, is rotatably inserted into the shaft support hole 51k1. A fastener 51k4, one end of which is fixed to the fastening piece 48a, is inserted into the elongated hole 51k2 so as to be movable in the longitudinal direction of the elongated hole 51k2. According to the illustrated example, the shaft-shaped member 51k3 and the fastener 51k4 are both bolts or screws with heads, and the heads are hooked onto the underside of the rotating bracket 51k and screwed into the fastening piece portion 48a to be fastened.

[0064] Therefore, according to the meshing amount adjustment mechanism 56 shown in Figures 9 and 10, the fastener 51k4 can be loosened to rotate the entire rotary damper unit 51 including the rotating bracket 51k, and this rotation changes the distance between the braking gear 51c and the rack 52, allowing the meshing amount to be adjusted appropriately. In particular, in this meshing amount adjustment mechanism 56, the entire rotary damper unit 51 is rotated by rotational movement with the shaft-shaped member 51k3 as the fulcrum, so there is relatively little rattling during movement, and the meshing amount adjustment work can be performed quickly and with high precision.

[0065] <Fourth embodiment> The meshing amount adjustment mechanism 57 shown in Figures 11 and 12 supports the rotary damper unit 51 so that it can rotate relative to the base member 47 and pedestal 51m1, which are immovable parts, and changes the meshing amount between the brake gear 51c and the rack 52 by the rotation of the rotary damper unit 51.

[0066] The base 51m1 is formed in an L-angle shape having one vertical side and the other horizontal side, and the one side is detachably fastened to the base member 47 by fasteners (screws, bolts, etc.).

[0067] The rotary damper unit 51 of this meshing amount adjusting mechanism 57 is provided with a rotating bracket 51m2 that is rotatably mounted on a base 51m1.

[0068] One end of the pivot bracket 51m2 is placed on the horizontal lower surface of the base 51m1, and the other end is fastened to the casing 51a. The one end of the rotating bracket 51m2 is provided with a circular shaft support hole 51m21 and a substantially arc-shaped elongated hole 51m22 that extends along the direction of rotation around the shaft support hole 51m21.

[0069] A shaft-like member 51m3, one end of which is fixed to the base 51m1, is rotatably inserted into the shaft support hole 51m21. A fastener 51m4, one end of which is fixed to the base 51m1, is inserted into the elongated hole 51m22 so as to be movable in the longitudinal direction of the elongated hole 51m22. According to the illustrated example, the shaft member 51m3 and the fastener 51m4 are both bolts or screws with heads, and the heads are hooked onto the underside of the rotating bracket 51m2 and are screwed into the base 51m1 and fastened.

[0070] Therefore, according to the meshing amount adjustment mechanism 57 shown in Figures 11 and 12, the meshing amount between the brake gear 51c and the rack 52 can be appropriately adjusted by loosening the fastener 51m4 and rotating the entire rotary damper unit 51 including the rotating bracket 51m2, and since there is relatively little rattle during the rotation, workability is good.

[0071] <Fifth embodiment> The meshing amount adjustment mechanism 58 shown in Figures 13 and 14 comprises a base 58a fixed to the base member 47, which is an immovable part, and a slide portion 58b supported by the base 58a so as to slide in a direction toward or away from the rack 52, and the slide portion 58b is configured integrally with the rotary damper unit 51.

[0072] The base 58a is a U-shaped member having a substantially horizontal flat plate portion 58a1, a piece portion 58a2 bent downward at one end of the flat plate portion 58a1, and a second piece portion 58a3 bent downward at the other end of the flat plate portion 58a1. The piece portion 58a2 is detachably fastened to the base member 47 by fasteners such as screws or bolts. A plurality of screw members for adjustment 58c are inserted into the other piece portion 58a3. According to the illustrated example, these screw members for adjustment 58c are screws or bolts.

[0073] The slide portion 58b integrally comprises a substantially horizontal flat plate portion 58b1, a piece portion 58b2 bent downward at one end of the flat plate portion 58b1, and a piece portion 58b3 bent downward at the other end of the flat plate portion 58b1, and is located within the flat plate portion 58a1.

[0074] The flat plate portion 58b1 fastens and fixes the casing 51a to one end side in the front direction, and the portion on the opposite side is engaged with the base 58a so as to move in the front direction. More specifically, the opposite side of the flat plate portion 58b1 has a slot 58b11 in the front direction. A plurality of slots 58b11 are provided and aligned in the front direction. A shaft-shaped support member 51b12 is inserted into each slot 58b11 so as to be movable in the longitudinal direction of the slot 58b11.

[0075] According to the illustrated example, the shaft-shaped support member 51b12 is a bolt or a screw, and its head engages with the flat plate portion 58b1, and is screwed into the flat plate portion 58a1 of the base 58a.

[0076] The piece portion 58b2 is a bent piece for reinforcement and can be omitted. The other piece portion 58b3 is screwed with a threaded portion of an adjustment screw member 58c that is inserted into the other piece portion 58a3 of the base 58a.

[0077] Therefore, according to the meshing amount adjustment mechanism 58 shown in Figures 13 and 14, by loosening the axial support member 51b12 and rotating the multiple adjustment screw members 58c appropriately, the projected position of the rotary damper unit 51 including the slide portion 58b can be changed, and after this position change, the axial support member 51b12 can be tightened to fix the slide portion 58b.

[0078] <Sixth embodiment> The meshing amount adjustment mechanism 59 shown in Figures 15 and 16 comprises a base 59a fixed to the base member 47, which is an immovable part, and a slide portion 59b integral with the rotary damper unit 51, and is configured so that the slide portion 59b slides in an inclined direction relative to the extension direction of the rack 52.

[0079] The base 59a is a member having a substantially L-shaped cross section, which has a substantially vertical fastening piece 59a1 and a substantially horizontal flat plate 59a2, and the fastening piece 59a1 is detachably fastened to the base member 47 by fasteners such as bolts or screws.

[0080] Two guide pieces 59a22 are fixed to the lower surface of the flat plate portion 59a2 so as to be substantially parallel and spaced apart in a direction perpendicular to the sliding direction of the rotary damper unit 51. Each guide piece 59a22 is a flat plate-like member that is rectangular in plan view.

[0081] The slide portion 59b integrally includes a substantially horizontal plate portion 59b1, a piece portion 59b2 bent downward at one end of the plate portion 59b1, and a second piece portion 59b3 bent downward at the other end of the plate portion 59b1. One end of the flat plate portion 59b1 is placed on the flat plate portion 59a2 of the base 59a, and the other end is fixed to the casing 51a. The one piece 59b2 and the other piece 59b3 are positioned so as to overlap each other between the two guide pieces 59a22, 59a22.

[0082] The flat plate portion 59b1 is provided with a slot 59b11 that is elongated in a direction inclined with respect to the direction in which the rack 52 extends. A plurality of (two in the illustrated example) shaft-shaped support members 59b12 are inserted into the elongated holes 59b11. According to the illustrated example, each of the shaft-shaped support members 59b12 is a screw or a bolt, and its head is hooked on the underside of the slide portion 59b and is screwed into the flat plate portion 59a2 of the base 59a.

[0083] Therefore, according to the meshing amount adjustment mechanism 59 shown in Figures 15 and 16, by loosening the multiple axial support members 59b12 and moving the rotary damper unit 51 including the slide portion 59b in an inclined direction relative to the extension direction of the rack 52, the brake gear 51c can be moved closer to or farther away from the rack 52, and the movement in the inclined direction can finely adjust the meshing amount between the brake gear 51c and the rack 52. After the movement, the shaft-shaped support member 59b12 is tightened to fix the slide portion 59b.

[0084] <Other variations> According to the above embodiment, the meshing amount adjustment mechanism is provided for a braking device in which the brake gear 51c, which rotates around a vertical axis, is meshed with the rack 52 on its side. However, as another example, it is also possible to provide a meshing amount adjustment mechanism of the above structure for a braking device in which a brake gear, which rotates around a horizontal axis, is meshed with a rack.

[0085] Furthermore, according to the above-mentioned opening and closing door device 1 (see Figure 1), the rotary damper unit 51 is positioned corresponding to the door tail side of the door body 10 in the closed state, but this rotary damper unit 51 can also be positioned corresponding to the center or door tip side of the door body 10 in the closed state, as long as it is positioned closer to the door tail side than the hoist 14.

[0086] Furthermore, in 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. To slow down the opening speed of the door body 10, the rotary damper unit 51 may be provided with a one-way type rotary damper mechanism that generates rotational resistance in the opposite direction to that described above. In order to reduce both the closing speed and the opening speed of the door body 10, the rotary damper unit 51 may be provided with a rotary damper mechanism that generates rotational resistance in both directions.

[0087] Furthermore, in the above embodiment, the rotary damper unit 51 is provided in a fixed position and the rack 52 is provided in the door body 10, but in another example, it is also possible to provide the rack 52 in a fixed position and the rotary damper unit 51 in the door body 10, inversely.

[0088] Furthermore, in the above embodiment, one rotary damper unit 51 and one rack 52 are provided, but as another example, it is also possible to provide a plurality of either one or both of these in the opening width direction. In this way, the braking range can be extended and a more suitable closing operation can be achieved, for example, by providing two rotary damper units 51 spaced apart 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.

[0089] Furthermore, according to the above embodiment, a sliding door device is configured in which the door body 10 is guided by the upper rail 46 and the lower rail 31, etc., to open and close in the opening width direction, but the basic structure of the above-mentioned braking device 50, etc., can be applied to opening and closing door devices other than the illustrated example that open and close by moving the door body in the opening width direction, such as a sliding door device that 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 that opens and closes by bending and unfolding the door body, and a balanced door device that opens and closes by moving the door body on the door front side in the opening width direction while rotating.

[0090] Furthermore, the present invention is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the present invention. [Explanation of symbols]

[0091] 1: Door opening and closing device 10: Totai 41,47,48: Base member 41a: Substrate section 50: Braking device 51: Rotary damper unit 51c: Braking gear 51k, 51m2: Rotating bracket 52: Rack 53,55~59: Engagement amount adjustment mechanism 53a: Spacer 55a: Inclined bracket 58b, 59b: Slide section

Claims

1. In an opening and closing door device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, The braking device comprises a rotary damper unit provided on one of the door body and the immovable portion, and a rack provided on the other of the door body and the immovable portion so as to mesh with a braking gear of the rotary damper unit, a meshing amount adjustment mechanism for adjusting the meshing amount between the brake gear and the rack; The rack is provided on the door body, and the rotary damper unit is provided on the immovable portion, The meshing amount adjustment mechanism enables adjustment of the position of the rotary damper unit relative to the immovable portion, and is provided with a spacer sandwiched between the immovable portion and the rotary damper unit, and the position of the rotary damper unit in the door thickness direction is adjusted by attaching and detaching the spacer.

2. A door opening and closing device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, The braking device comprises a rotary damper unit provided on one of the door body and the immovable portion, and a rack provided on the other of the door body and the immovable portion so as to mesh with a braking gear of the rotary damper unit, a meshing amount adjustment mechanism for adjusting the meshing amount between the brake gear and the rack; The rack is provided on the door body, and the rotary damper unit is provided on the immovable portion, the meshing amount adjustment mechanism is capable of adjusting the position of the rotary damper unit relative to the immovable portion, and includes an inclined bracket extending so as to be inclined with respect to the extending direction of the rack and fixed to the immovable portion, The inclined bracket has a plurality of fastening portions spaced apart in the extension direction, The rotary damper unit is selectively fastened to the plurality of fastening portions.

3. A door opening and closing device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, The braking device comprises a rotary damper unit provided on one of the door body and the immovable portion, and a rack provided on the other of the door body and the immovable portion so as to mesh with a braking gear of the rotary damper unit, a meshing amount adjustment mechanism for adjusting the meshing amount between the brake gear and the rack; The rack is provided on the door body, and the rotary damper unit is provided on the immovable portion, The meshing amount adjustment mechanism enables adjustment of the position of the rotary damper unit relative to the immovable portion, and supports the rotary damper unit so that it can rotate relative to the immovable portion, and the rotation of the rotary damper unit changes the meshing amount between the brake gear and the rack.

4. the rotary damper unit includes a rotating bracket that rotates relative to the immovable portion, 4. The opening and closing door device according to claim 3, wherein the pivot bracket has an elongated hole formed along the direction of the pivot, and a fastener that is threadedly engaged with the immovable portion is inserted into the elongated hole.

5. A door opening and closing device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, The braking device comprises a rotary damper unit provided on one of the door body and the immovable portion, and a rack provided on the other of the door body and the immovable portion so as to mesh with a braking gear of the rotary damper unit, a meshing amount adjustment mechanism for adjusting the meshing amount between the brake gear and the rack; The rack is provided on the door body, and the rotary damper unit is provided on the immovable portion, The meshing amount adjustment mechanism enables adjustment of the position of the rotary damper unit relative to the immovable portion, and is characterized in that it comprises a base fixed to the immovable portion and a sliding portion supported by the base so as to slide in a direction toward and away from the rack, and the sliding portion is configured integrally with the rotary damper unit.

6. 6. The opening and closing door device according to claim 5, wherein the slide portion is provided so as to slide in an inclined direction relative to the extending direction of the rack.

7. A door opening and closing device comprising a door body that opens and closes while moving in the opening width direction, and a braking device that slows down the speed of the door body, The braking device comprises a rotary damper unit provided on one of the door body and the immovable portion, and a rack provided on the other of the door body and the immovable portion so as to mesh with a braking gear of the rotary damper unit, a meshing amount adjustment mechanism for adjusting the meshing amount between the brake gear and the rack; The rack is provided on the door body, and the rotary damper unit is provided on the immovable portion, The braking gear of the rotary damper unit is provided with teeth facing laterally, The opening and closing door device is characterized in that the meshing amount adjustment mechanism is capable of adjusting the position of the rotary damper unit relative to the immovable portion in the projection direction.

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