Door device and hinge device used therein

Abstract

To provide a door device that can open / close a door body smoothly while keeping the door body vertical.SOLUTION: A door device including a plurality of hinge sets 55 each having a first hinge 50 fixed to a door support frame 2, a second hinge 51 fixed to a door body 4, and a rotary hinge 54 connected to the first hinge 50 and the second hinge 51 by being pivoted on the first hinge 50 and the second hinge 51 via hinge shafts 52 and 53, respectively, in which the rotary hinges 54, which are separated vertically, are connected to each other by means 52 extending in the vertical direction to prevent relative rotation.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a pivotable door device and a hinge device used therein. [Background technology]

[0002] An example of a pivotable door device and a hinge device used therein is described in Patent Document 1. The hinge device described in Patent Document 1 is a two-axis hinge device (hinge set) fixed to one surface of a door support frame (door frame) and one surface of a door main body (door main body) so as to face each other, and is disposed above and below the door main body, which is supported so as to be rotatable relative to the door support frame. Each two-axis hinge device is composed of a pair of upper and lower hinges (bearing blocks) fixed to the door support frame, a pair of upper and lower hinges (bearing blocks) fixed to the door main body, and a rotating hinge (hinge rod) sandwiched between the upper and lower hinges and pivotally supported at both end portions by hinge pins so as to be horizontally rotatable. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 7-279550 (page 3, Figure 1) Summary of the Invention [Problem to be solved by the invention]

[0004] The use of the biaxial hinge device described in Patent Document 1 has the advantage of allowing the opening angle of the door body to be increased, but because the rotating hinge is free to rotate horizontally around the left and right hinge pins, the timing of the rotation of the upper and lower rotating hinges may be misaligned when the door body is opened or closed. In particular, when the biaxial hinge device described in Patent Document 1 is applied to a door device mounted on a partition panel of a movable partition device that separates a room, the following problems may arise.

[0005] Specifically, the multiple partition panels that make up a movable partition device are suspended from guide rails installed on the ceiling and move along the floor. Therefore, the vertical dimensions of the partition panels are large, and the vertical dimensions of the door bodies attached to them are often also relatively large. When the upper and lower ends of such a large, heavy door body are supported by two-axis hinge devices, not only is a large downward load applied to the hinge devices, but the upper hinge device also experiences a large tensile load and the lower hinge device experiences a large compressive load when the door body is opened or closed. This results in strong contact between the hinge and the rotating hinge, and frictional resistance makes it difficult for the upper and lower rotating hinges to rotate synchronously. This can cause the door body to tilt relative to the door frame, making it difficult to open and close smoothly while maintaining its verticality.

[0006] The present invention has been made in light of these problems, and aims to provide a door device and a hinge device for use therewith that enable smooth opening and closing while maintaining the door body vertical. [Means for solving the problem]

[0007] In order to solve the above problems, the door device of the present invention comprises: A door device having a plurality of upper and lower hinge sets, each of which includes a first hinge fixed to a door support frame, a second hinge fixed to a door main body, and a rotating hinge connected to the first hinge and the second hinge by being pivotally supported by a hinge shaft, The vertically spaced apart rotating hinges are connected to each other by connecting means extending in the vertical direction so as not to be able to rotate relative to each other. And, The connecting means is such that both upper and lower ends of the hinge shaft on either the door support frame side or the door body side are fixed and connected to the rotating hinges spaced apart in the vertical direction. It is characterized by the fact that According to this feature, the vertically spaced rotating hinges rotate in sync with each other via the connecting means extending in the vertical direction, allowing the door body to be opened and closed smoothly while maintaining its vertical position. In addition, because the upper and lower hinge sets are positioned vertically via the connecting means, there is no need to adjust their vertical positions individually, and they can be efficiently and accurately attached to the door support frame and door body in their fixed positions.

[0008] The connecting means is characterized in that the upper and lower ends of the hinge shaft on either the door support frame side or the door body side are fixed and connected to the rotating hinges spaced apart vertically. According to this feature, the vertically spaced rotating hinges can be rotated synchronously around either the hinge shaft on the door frame side or the hinge shaft on the door body side. Also, since the connecting means can be configured using only the long hinge shaft, there is no need to connect the upper and lower rotating hinges using other connecting means, which improves assembly efficiency.

[0009] The connecting means is characterized in that both upper and lower ends of the hinge shaft on the door support frame side are fixedly connected to the rotating hinges spaced apart from each other in the vertical direction. According to this feature, by connecting the hinge shaft on the door support frame side, where the torsional stress due to the tensile load and compressive load acting on the upper and lower hinge sets is greater, the upper and lower rotating hinges rotate reliably in sync via the hinge shaft, and the door body is always kept perpendicular to the door support frame when opening and closing.

[0010] The hinge set allows the door body to be opened and closed between a fully closed state in which the front surface of the door support frame and the front surface of the door body are flush with each other, and a fully open state in which the front surface of the door support frame and the front surface of the door body are parallel to each other, and the upper and lower rotating hinges have threaded holes that open to the front or rear and communicate with shaft holes through which the hinge shafts on the door support frame are inserted, and set screws that can fix the hinge shafts are screwed into the threaded holes. According to this feature, when the door body is in the fully closed or fully open state, the front or rear surfaces of the upper and lower rotating hinges can be aligned to the same plane, and in this state, by threading set screws into the screw holes of the upper and lower rotating hinges to fix the hinge shafts extending in the vertical direction on the door support frame side, the phases of the upper and lower rotating hinges can be accurately aligned so that they rotate in sync with each other.

[0011] The door support frame comprises a frame member extending in the vertical direction and a covering member covering a vertical recess formed on the front and / or rear surface of the frame member, and the hinge axis extending in the vertical direction on the door support frame side is accommodated in the recess on the front side and is concealed by the covering member. According to this feature, the hinge shaft extending in the vertical direction is not exposed to the outside, improving the appearance of the door device.

[0012] In order to solve the above problems, the hinge device of the present invention comprises: The hinge set is provided spaced apart vertically, and includes a first hinge fixed to the door support frame, a second hinge fixed to the door body, and a rotating hinge connected to the first hinge and the second hinge via a hinge shaft. The rotating hinges spaced apart vertically are fixed to the hinge shaft that extends vertically and is inserted through the first hinge and the rotating hinge, and are connected so as not to be able to rotate relative to each other. According to this feature, the vertically spaced rotating hinges can be rotated synchronously by the hinge shaft extending vertically on the door support frame side, so the door body can be opened and closed smoothly while remaining perpendicular to the door support frame. In addition, the upper and lower hinge sets are positioned vertically via the hinge shaft, so they can be accurately attached to the door support frame and door body in their fixed positions. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a front view of a movable partition device to which an embodiment of the present invention is applied. [Figure 2]FIG. 2 is an enlarged cross-sectional plan view taken along line AA in FIG. [Figure 3] FIG. [Figure 4] FIG. 10 is a perspective view of the hinge set assembled. [Figure 5] FIG. 5 is a cross-sectional plan view taken along line BB in FIG. 4. [Figure 6] FIG. 2 is a perspective view of a portion of a door device to which a hinge device is attached. [Figure 7] 10(a) to 10(d) are schematic plan views showing the state in which the door body starts to open around the hinge shaft on the door body side and opens to the fully open state. [Figure 8] 10(a) to 10(d) are schematic plan views showing the state in which the door body starts to open around the hinge shaft on the door support frame side and opens to the fully open state. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A door device and a hinge device used therein according to the present invention will be described below with reference to the following examples. [Example]

[0015] A door device and a hinge device used therein according to an embodiment will be described with reference to Figures 1 to 8. In the following description, the front side of the movable partition device in Figure 1 (the lower side of the paper in Figure 2) will be referred to as the front.

[0016] FIG. 1 shows a movable partition device to which the door device and hinge device of the present invention are applied. The movable partition device 100 is used to divide the interior of an office, conference room, showroom, store, or the like into predetermined sections, and is composed of a door-equipped partition panel 101 having a door device 1 of the present invention and multiple partition panels 102. The upper ends of the partition panels 101, 102 are suspended from suspension members (not shown) that move along guide rails 103 provided on the ceiling R of the room. The partition panels 101, 102 are sequentially moved along the guide rails 103 toward the side wall W and connected in a row in the direction of travel, thereby partitioning the interior space from the ceiling surface R to the floor surface F. By opening and closing the door device 1 of the door-equipped partition panel 101, people can move between the two partitioned interior spaces.

[0017] Door support frames 2, 2 extending in the vertical direction are provided on both the left and right sides of the door-equipped partition panel 101, and a door body 4 of the door device 1 is housed between the door support frames 2, 2. As shown in Fig. 2, the door support frames 2, 2 include a square tubular frame member 2a (only the right side is shown) extending in the vertical direction and facing panels 3, 3 as facing members covering the front and rear surfaces of the frame member 2a, and the door body 4 is supported by the right frame member 2a so as to be able to open and close by a hinge device 5 of the present invention, which will be described later.

[0018] The door device 1 comprises a door body 4 that is slightly lower than the overall height of the door-equipped partition panel 101, and two upper and lower hinge devices 5, 5 that support the door body 4 so that it can be opened and closed forward. The door body 4 has a door frame body 6 that is a vertically long, four-sided frame, and facing panels 7, 7 that serve as facing members that cover the front and rear of the door frame body 6, and the hinge devices 5, 5 are attached to a frame member 2a on the right side of the door support frame 2 and to a vertical frame 6a that is shaped like a square tube on the right side of the door frame body 6 (details will be described later).

[0019] 3 to 5, the upper and lower hinge devices 5 (only the upper hinge device is shown because they have the same structure except for the direction in which the hinge shaft 52 extends) have a hinge set 55 including a first hinge 50 fixed to the frame member 2a of the right door support frame 2, a second hinge 51 fixed to the right vertical rod 6a of the door frame 6, and a rotating hinge 54 connected to the first hinge 50 and the second hinge 51 by a long hinge shaft 52 and a short hinge shaft 53 so as to be horizontally rotatable. The long hinge shaft 52 on the first hinge 50 side also serves as a connecting means for connecting the rotating hinges 54 of the upper and lower hinge devices 5, and its length is set to a dimension that allows the upper and lower hinge sets 54 to be positioned and attached in fixed positions on the door support frame 3 and the door body 4.

[0020] The first hinge 50 and the second hinge 51 are symmetrical and have plate-shaped fixed portions 50a, 51a facing in the vertical direction, and a pair of upper and lower rotating hinge holding portions 50b, 50b, 51b, 51b protruding inward from the upper and lower ends of the fixed portions 50a, 51a so as to face each other vertically. The upper and lower rotating hinge holding portions 50b, 51b are formed with shaft holes 50c, 51c that penetrate vertically and into which hinge shafts 52, 53 are fitted. The fixed portions 50a, 51a are formed with a plurality of upper and lower screw holes 50d, 51d that penetrate horizontally.

[0021] The vertical dimension of the rotating hinge 54 is slightly smaller than the dimension between the opposing surfaces of the upper and lower rotating hinge holding portions 50b, 51b, and the front-to-rear dimension is approximately equal to the front-to-rear dimension of the rotating hinge holding portions 50b, 51b. Furthermore, as shown in Fig. 4, the left-to-right dimension is such that, when the rotating hinge 54 is connected to the first hinge 50 and the second hinge 51, the opposing surfaces of the rotating hinge holding portions 50b, 51b are spaced apart by a predetermined distance, allowing the rotating hinge holding portions 50b, 51b to rotate relative to each other without interfering with each other. Furthermore, the left and right corners on the front side of the rotating hinge 54 are chamfered into arc-shaped curved surfaces, allowing the rotating hinge 54 to rotate without interfering with the fixing portions 50a, 51a of the first hinge 50 and the second hinge 51. At both ends of the rotation hinge 54, shaft holes 54a, 54a are formed slightly forward, penetrating vertically, into which the hinge shafts 52, 53 are fitted.

[0022] A screw hole 54b (connecting means) that opens to the rear surface and communicates with the right-side shaft hole 54a is formed on the right side of the rotating hinge 54, and the upper end of the long hinge shaft 52 that is inserted into the shaft hole 54a is fixed by a setscrew 8 (connecting means), which is a so-called set screw, that is screwed into this screw hole 54b (see Figure 5). The lower end of the hinge shaft 52 is also fixed to the rotating hinge 54 of the lower hinge set 55 in the same manner as above (a set screw is screwed into a screw hole).

[0023] To assemble the hinge set 55 of the hinge device 5, the rotating hinge 54 is sandwiched between the upper and lower rotating hinge holding portions 50b, 51b of the first hinge 50 and the second hinge 51, and the hinge shafts 52, 53 are inserted into the shaft holes 50c, 51c of the upper and lower rotating hinge holding portions 50b, 51b and the left and right shaft holes 54a, 54a of the rotating hinge 54, thereby connecting the rotating hinge 54 to the first hinge 50 and the second hinge 51 so that it can rotate freely relative to each other.

[0024] At this time, synthetic resin thrust washers 9, 9 are sandwiched between the lower rotating hinge holding portion 50b of the first hinge 50 and the rotating hinge 54, and between the upper rotating hinge holding portion 51b of the second hinge 51 and the rotating hinge 54, in order to reduce frictional resistance. The left hinge shaft 53 is press-fitted non-rotatably into the shaft holes 51c, 51c of the rotating hinge holding portions 51b, 51b of the second hinge 51, and the right hinge shaft 52 is rotatably fitted into the shaft holes 50c, 50c of the rotating hinge holding portions 50b, 50b of the first hinge 50. The hinge set 55 of the lower hinge device 5 is assembled in the same manner as the upper hinge device 5.

[0025] After assembly, the rotating hinge 54 of the hinge set 55 can rotate forward by 90 degrees relative to the first hinge 50 and the second hinge 51. Furthermore, when the door body 4 is in a fully closed state, the front faces of the first hinge 50, the second hinge 51, and the rotating hinge 54 of the hinge set 55 are aligned in the same plane (see Figures 1 and 4). This prevents the hinge set 55 from protruding forward from the front face of the door-attached partition panel 101.

[0026] The rotating hinges 54 of the upper and lower hinge sets 55 assembled in this manner are connected to each other by the long hinge shaft 52. At this time, the upper and lower hinge sets 55 are held so that the door body 4 is in the fully closed state (the state shown in FIG. 4), and with the front or rear surfaces of the upper and lower rotating hinges 54 aligned on the same plane, both ends of the long hinge shaft 52 inserted through the rotating hinges 54 of the upper and lower hinge sets 55 are fixed by set screws 8 threaded into the shaft holes 54b. In this way, the upper and lower rotating hinges 54 can be connected with their phases (directions) accurately aligned, and the upper and lower rotating hinges 54 will rotate synchronously. The upper and lower hinge sets 55 may be held in the fully open state of the door body 4 (a state in which the rotating hinges are rotated 90 degrees around the hinge shafts 52 (see Figures 7 and 8)), and the front or rear surfaces of the upper and lower rotating hinges 54 may be aligned and connected to each other in the same plane.

[0027] Next, a method for attaching the upper and lower hinge devices 5 to the door frame 2 and the door main body 4 will be described. As shown in Figures 2 and 6, base pieces 10a, 10a of mounting brackets 10, 10 having an inverted L shape in a plan view, are fixed with a plurality of bolts 11 to the front surface of the frame member 2a of the door frame 2 and the upper and lower ends of the front surface of the vertical rod 6a of the door frame 6. The fixing portions 50a, 51a of the upper and lower first hinges 50 and second hinges 51 are abutted against the inner surfaces of forward pieces 10b, 10b connected to the opposing edges of the mounting brackets 10, 10, and the bolts 11 are screwed into the plurality of screw holes 50d, 51d of the fixing portions 50a, 51a from the outside of the forward piece 10b to secure the upper and lower hinge sets 55, 55 to the frame member 2a of the door frame 2 and the vertical frame 6a of the door frame 6. As shown in FIG. 1, the mounting panels 3 and 7 have cutouts 3a and 7a formed along the outer edge shapes of the hinge sets 55 and 55 at the portions where the upper and lower hinge sets 55 and 55 are attached.

[0028] When installing the hinge devices 5, 5, the upper and lower hinge sets 55, 55 are connected via long hinge shafts 52 fixed to the upper and lower rotating hinges 54, 54 and are positioned in the vertical direction, so there is no need to position the upper and lower hinge sets 55, 55 individually, and they can be installed efficiently and accurately in fixed positions on the door support frame 2 and door body 6.

[0029] After the hinge sets 55, 55 are attached, the long hinge shaft 52 is concealed as follows. As shown in Figures 2 and 6, vertically extending panel mounting members 12, 12 for attaching the exterior panels 3, 3 are fixed to both side surfaces of the frame member 2a of the door support frame 2 so as to protrude forward and rearward from the frame member 2a, and a vertically extending recess 13 is formed between the front surface of the frame member 2a and the forward-facing protrusions of the left and right panel mounting members 12, 12. The long hinge shaft 52 is housed in this recess 13 and is concealed by being covered by the front-side exterior panel 3 (the front-side exterior panel is omitted in Figure 6).

[0030] Next, the operation of the door device 1 and the hinge device 5 will be described with reference to Figures 7 and 8. Figures 7(a) to 7(d) are schematic plan views of the door body 4 when it begins to open around the hinge shaft 53 on the second hinge 51 side, and the door body 4 in a fully closed state is first opened to a position where the inner surface of the mounting portion 51a of the second hinge 51 abuts against the front surface of the rotating hinge 54, that is, to an angle of 90 degrees, as shown in Figures 7(a) and 7(b).

[0031] When the door body 4 is opened further from this state, as shown in Figures (c) and (d), the rotating hinge 54 rotates 90 degrees counterclockwise in plan view around the hinge shaft 52 on the first hinge 50 side, and the door body 4 is opened 180 degrees to the fully open position where its front face faces parallel to the front face of the door support frame 2. At this time, the rotating hinges 54 of the upper and lower hinge devices 5 are connected to each other by the long hinge shaft 52 and rotate synchronously with each other, so that the door body 4 can be opened smoothly while remaining perpendicular to the door support frame 2.

[0032] 8(a) to 8(d) are schematic plan views showing the door body 4 when it begins to open around the hinge shaft 52 on the first hinge 50 side, and at this time, the rotating hinge 54 first rotates 90 degrees counterclockwise in plan view to a position where it abuts against the inner surface of the mounting portion 50a of the first hinge 50. As a result, the door body 4, which is in a fully closed state, is opened up to 90 degrees around the hinge shaft 52 on the first hinge 50 side, as shown in 8(a) and 8(b).

[0033] When the door body 4 is opened further from this state, as shown in (c) and (d), the door body 4 rotates about the hinge shaft 53 on the second hinge 51 side, and is opened 180 degrees to the fully open position where the front surface of the door body 4 and the front surface of the door support frame 2 face each other in parallel. At this time, as in the above case, the rotating hinges 54 of the upper and lower hinge devices 1 are connected to each other by the long hinge shaft 52 and rotate in sync with each other, so the door body 4 can be opened smoothly while remaining vertical.

[0034] As explained above, in the door device 1 and the hinge device 5 used therein according to the embodiment, the hinge shaft 52 on the door support frame 2 side is elongated in the vertical direction, and the rotating hinges 54, 54 of the upper and lower hinge sets 55, 55 are connected to the upper and lower ends of the hinge shaft 52 in phase with each other, so that the rotating hinges 54, 54 spaced apart vertically rotate in sync with each other. As a result, the door body 4 can be opened and closed smoothly while remaining perpendicular to the door support frame 2.

[0035] Furthermore, since the vertically spaced rotating hinges 54, 54 have a longer moment length in the left-right direction of the door body 4 on the hinge shaft 52 on the door frame 2 side than on the hinge shaft 53 on the door body 4 side, when the door body 4 is opened or closed, a larger torsional stress is exerted on the hinge shaft 52 on the door frame 2 side due to the tensile load and compressive load acting on the upper and lower hinge sets 55, 55. For this reason, it is preferable to fix the upper and lower ends of the hinge shaft 52 on the door frame 2 side to the upper and lower rotating hinges 54, 54, thereby connecting these rotating hinges 54, 54 to each other. This ensures that the upper and lower rotating hinges 54, 54 rotate in sync via the hinge shaft 52, and the door body 4 is always kept perpendicular to the door frame 2 when opened or closed.

[0036] Furthermore, the upper and lower hinge sets 55, 55 are positioned vertically via the long hinge shaft 52 extending vertically, so there is no need to adjust the vertical positions individually, and they can be efficiently and accurately attached to the fixed positions of the door support frame 2 and the door body 4.

[0037] Furthermore, because the connecting means can be formed by the hinge shaft 52, there is no need to use other connecting means to connect the upper and lower rotating hinges 54 together, improving assembly labor and efficiency. In addition, because the connecting means does not protrude from the side surfaces of the first hinge 50, second hinge 51, and rotating hinge 54 that make up the hinge sets 55, 55, the first hinge 50, second hinge 51, and rotating hinge 54 do not need to have a complex structure to avoid the connecting means, and 180-degree opening and closing operations can be performed.

[0038] Furthermore, the long hinge shaft 52 is housed in a recess 13 formed on the front surface of the door support frame 2 and is concealed by the facing panel 3, so it is not exposed to the outside, improving the appearance of the door device 1 and the hinge device 5.

[0039] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes modifications and additions that do not deviate from the gist of the present invention.

[0040] For example, in the above embodiment, the upper and lower rotating hinges 54, 54 are connected to each other by the long hinge shaft 52 on the door support frame 2 side, but the hinge shaft 53 on the door body 4 side may also be made long to connect them.

[0041] Furthermore, the hinge shaft 52 serving as the connecting means may be configured by connecting rods divided in the longitudinal direction. For example, it may be configured by short hinge shaft members attached non-rotatably to the upper and lower first hinges 50, respectively, and a connecting member that non-rotatably connects these hinge shaft members.

[0042] Furthermore, in the above embodiment, the upper and lower rotating hinges 54, 54 are connected to each other using the long hinge shaft 52, but for example, a connecting rod that is long in the vertical direction may be used as the connecting means, and both ends of the connecting rod may be fixed to the front or rear surfaces of the upper and lower rotating hinges 54 by welding, screws, etc., thereby connecting the upper and lower rotating hinges 54, 54 so that they cannot move relative to each other. In this case, the first hinge 50 and the rotating hinge 54 are rotatably connected to each other by a short hinge shaft similar to the hinge shaft 53.

[0043] Furthermore, the means for fixing the hinge shaft 52 to the upper and lower rotating hinges 54, 54 is not limited to the set screws used in the above embodiment, but may be press-fitting or welding of both the upper and lower ends of the hinge shaft 52, for example.

[0044] In the above embodiment, the hinge shaft 52 is fixed to the rotating hinge 54 so as to be non-rotatable relative to the rotating hinge 54, but the hinge shaft may be connected to the rotating hinge with a slight amount of play in the rotational direction. For example, the hinge shaft may have a shape with a convex ridge that protrudes radially from the cylindrical main body, and the through-hole of the rotating hinge into which the hinge shaft is fitted may have a substantially convex shape.

[0045] Furthermore, in the above embodiment, the present invention is applied to a door-equipped partition panel of a movable partition device, but the present invention can also be applied to door devices and hinge devices installed in partitions that divide a room or partitions that create a work booth, as well as general door devices and hinge devices installed at entrances and exits. [Explanation of symbols]

[0046] 1 Door device 2 Door support frame 2a Frame member 3. Surface panels (surface components) 4 Door body 5 Hinge device 6 Door frame 6a Vertical frame 7. Surface panels (surface components) 8 Set screw (connection means) 9 Thrust washer 10 Mounting bracket 11 volts 12 Panel mounting material 13 Recess 50 First hinge 50a, 51a fixed part 50b, 51b Rotating hinge holding portion 50c, 51c shaft hole 50d, 51d screw holes 51 Second hinge 52 Hinge shaft (connection means) 53 Hinge axis 54 Rotating Hinge 54a shaft hole 54b screw hole (connection means) 55 Hinge Set

Claims

1. A door device having a plurality of upper and lower hinge sets, each of which includes a first hinge fixed to a door support frame, a second hinge fixed to a door main body, and a rotating hinge pivotally supported by the first hinge and the second hinge via a hinge shaft, and thereby connected to the first hinge and the second hinge, The vertically spaced apart rotation hinges are connected to each other by connecting means extending in the vertical direction so as not to be able to rotate relative to each other, The door device is characterized in that the connecting means is such that both upper and lower ends of the hinge shaft on either the door support frame side or the door body side are fixed and connected to the rotating hinges spaced apart in the vertical direction.

2. 2. The door device according to claim 1, wherein the connecting means is configured such that both upper and lower ends of the hinge shaft on the door support frame side are fixedly connected to the rotating hinges spaced apart from each other in the vertical direction.

3. 3. The door device according to claim 1, wherein the hinge set enables the door body to be opened and closed between a fully closed state in which the front surface of the door support frame and the front surface of the door body are flush with each other, and a fully open state in which the front surface of the door support frame and the front surface of the door body are parallel to each other, and the upper and lower rotating hinges have threaded holes that open to the front or rear and communicate with shaft holes through which hinge shafts on the door support frame are inserted, and set screws that can fix the hinge shafts are screwed into the threaded holes.

4. The door device according to any one of claims 1 to 3, characterized in that the door support frame comprises a frame member extending in the vertical direction and a covering member covering a vertical recess formed on the front and / or rear surface of the frame member, and the hinge shaft extending in the vertical direction on the door support frame side is housed in the recess on the front side and is concealed by the covering member.

5. A hinge device characterized in that hinge sets each including a first hinge fixed to a door support frame, a second hinge fixed to a door body, and a rotating hinge connected to the first hinge and the second hinge via a hinge shaft are provided spaced apart from each other in the vertical direction, and the rotating hinges spaced apart from each other are fixed to the hinge shaft that extends in the vertical direction and is inserted through the first hinge and the rotating hinge, and are connected so as not to be able to rotate relative to each other.

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