Booth and hinges

Abstract

To make it possible to open an emergency entrance between a door and a partition wall without removing an inward opening type door installed at an entrance / exit of a booth from the partition wall.SOLUTION: Each hinge 8 has a blade 21 fixed to a partition wall 1, a blade 22 fixed to a door 7, and an intermediate hinge 23 which rotates relative to the blade 21 about a hinge shaft 24 and rotates relative to the blade 22 about a hinge shaft 27. The intermediate hinge 23 is in a fixed state of not being capable of rotating relative to the blade 22 but cannot rotate relative to the blade 21. When a specified operation is applied to an operation unit 43 on the outside of a room, the intermediate hinge 23 is in a fixed-state released state. When the lock 9 is unlocked and the intermediate hinge 23 is in the fixes state released state, the door 7 is pushed toward the inside of the room, whereby the intermediate hinge 23 is rotated toward the inside of the room about the hinge shaft 24, and the door 7 is rotated toward the outside of the room about the hinge shaft 27, whereby an emergency entrance 12 is opened between the door 7 and the partition wall 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to booths such as toilet booths and work booths, and hinges for connecting partition walls and doors between these booths.

Background Art

[0002] Booths such as toilet booths and work booths are generally partitioned indoors or outdoors by partition walls and have an entrance / exit opening / closing door (for example, Patent Document 1).

[0003] As such a door for a booth, there is a single-opening type door that is hung only on the partition wall located on one side (left or right) of the entrance / exit opening. The single-opening type door is generally connected to the partition wall using a hinge, and is roughly classified into an outward-opening type door that opens to the outside and an inward-opening type door that opens to the inside.

[0004] Among them, the inward-opening type door provides a space for the door to open and close indoors, so that the space required for installing the booth can be made compact. On the other hand, when an occupant falls indoors and becomes unable to move, even if one tries to open the door from the outside for rescue, there is a possibility that the occupant may get in the way and prevent the door from being opened. When such an emergency occurs, it is preferable to be able to perform an emergency opening operation of removing the door from the outside and opening the entrance / exit opening as easily as possible.

[0005] Conventionally, in order to facilitate the removal of a door, there is a hinge having a first shaft cylinder and a first wing with a first fastening plate attached in a series, a second shaft cylinder and a second wing with a second fastening plate attached in a series, and a hinge shaft extending between the first and second shaft cylinders, wherein the first fastening plate is fastened to the end grain surface on the hinge side of the door, and the second fastening plate is fastened to the visible surface of the partition wall opposite the end grain surface, and the second shaft cylinder incorporates a hinge shaft, a coil spring that biases the hinge shaft in a direction that causes it to protrude into the first shaft cylinder on the door side, and a locking member that is inserted through a guide hole that penetrates the inside and outside of the second shaft cylinder on the door frame side and is connected to move integrally with the hinge shaft, and the hinge shaft can be removed from the first shaft cylinder by pushing down the locking member against the coil spring, and the locking member can be held in the pushed-down position by moving the locking member horizontally (Patent Document 2). [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2011-127394 [Patent Document 2] Japanese Patent Application Publication No. 10-82236 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] However, when disassembling the hinges connecting the hinge side of an inward-opening door to the partition wall during an emergency opening operation to remove the door from the partition wall, an outside worker would have to hold the door by hand, lift it so that the hinge shaft comes out of the shaft cylinder, and move the door out of the entrance / exit. In this case, the door is difficult to hold, and there is a concern that it may accidentally fall inward, hitting an occupant who is lying down inside the room.

[0008] In light of the above background, the problem that this invention aims to solve is to create an emergency entrance between a door and a partition wall without removing the inward-opening door that opens and closes the entrance / exit door from the partition wall. [Means for solving the problem]

[0009] To achieve the above objectives, this invention provides an inward-opening door for opening and closing an entrance / exit provided between a first partition wall and a second partition wall, a plurality of hinges connecting the hinge side of the door to the first partition wall, and a lock for locking the door, wherein each of the plurality of hinges has a first wing fixed to the first partition wall and a second wing fixed to the door, and each of the plurality of hinges further has an intermediate hinge that rotates relative to the first wing about a first hinge axis and relative to the second wing about a second hinge axis, wherein the intermediate hinge is rotatable relative to the second wing but not rotatable relative to the first wing. The intermediate hinge is fixed to the interior wall surface of the first partition wall, and the fixing structure of the intermediate hinge to the first partition wall has an operating part located on the exterior side of the first partition wall, and is provided such that when a predetermined operation is applied to the operating part from the outside, the intermediate hinge is released so that it can rotate inward around the first hinge axis. When the lock is unlocked and the intermediate hinge is released, the door is pushed inward, causing the intermediate hinge to rotate inward around the first hinge axis, and the door rotates outward around the second hinge axis, thereby opening an emergency entrance between the door and the second partition wall.

[0010] In the booth configuration described above, under normal circumstances, when the intermediate hinges of each hinge connecting the inward-opening door to the first partition wall are fixed to the interior wall surface of the first partition wall, each second wing fixed to the door is in a state where it can rotate relative to each intermediate hinge around each second hinge axis, and the door can be opened and closed exclusively around each second hinge axis. On the other hand, when performing emergency opening work, after the worker releases the fixing of each intermediate hinge and unlocks the lock from outside, if the door is pushed inward, torque is applied to each intermediate hinge around the first hinge axis via the second hinge axis, so that each intermediate hinge rotates inward around the first hinge axis relative to each first wing fixed to the first partition wall, moving the door away from the first and second partition walls and to a position where the door can be rotated outward around the second hinge axis. Then, by rotating the door outward around the second hinge axis, the leading edge of the door faces outward, opening the space between the door and the second partition wall, and creating an emergency entrance. Thus, with the booth configuration described above, an emergency entrance can be created between the door and the second partition wall without removing the door from the first partition wall.

[0011] Furthermore, this invention comprises a first wing, a second wing, and an intermediate hinge provided so as to be rotatable relative to the first wing about a first hinge axis and relative to the second wing about a second hinge axis in the same direction as the first hinge axis, wherein the intermediate hinge has a first intermediate shaft cylinder into which the first hinge axis is inserted, a second intermediate shaft cylinder into which the second hinge axis is inserted, and an intermediate plate provided integrally with the first and second intermediate shaft cylinders, and the intermediate plate is configured as a hinge having a fastening portion for applying fastening force in a direction perpendicular to the first and second hinge axes.

[0012] According to the hinge configuration described above, of the first and second partition walls located on both sides of an entrance / exit that opens and closes with an inward-opening door, a hole is provided in the first partition wall located on the side of the door that is hinged, extending from the inside to the outside. The fastening portion (e.g., screw portion) of the intermediate hinge's intermediate plate and the corresponding fastening member (e.g., screw member) are fastened (screwed, etc.) through the hole in the first partition wall, thereby applying a fastening force between the intermediate plate and the interior wall surface of the first partition wall, fastening them together. The intermediate hinge can be fixed on the interior wall surface of the partition wall so that the first and second intermediate shaft cylinders face vertically. Furthermore, the fastening member is positioned on the exterior side of the first partition wall as an operating part for releasing the intermediate hinge from the outside, and the intermediate hinge can be released by a predetermined operation such as rotating the fastening member. Furthermore, by determining the fixing positions of the first wing, the second wing, and the intermediate hinge such that the shaft cylinder of the first wing and the first intermediate shaft cylinder of the intermediate hinge are in a positional relationship where they face each other on the same axis, and the shaft cylinder of the second wing and the second intermediate shaft cylinder of the intermediate hinge are in a positional relationship where they face each other on the same axis, it is possible to achieve a state in which the intermediate hinge can rotate relative to the second wing around the second hinge axis, but cannot rotate relative to the first wing around the first hinge axis. Moreover, by releasing the fixing of this intermediate hinge, it is possible to achieve a state in which the intermediate hinge can be rotated relative to the first wing around the first hinge axis, and can be rotated outward relative to the second wing around the second hinge axis. Therefore, by employing the hinge configuration described above, the booth described above according to this invention can be constructed. [Effects of the Invention]

[0013] Thus, by employing the booth according to the above configuration or constructing the booth according to the above configuration using the hinges according to the above configuration, this invention makes it possible to create an emergency entrance between the door and the partition wall without removing the inward-opening door that opens and closes the entrance and exit from the partition wall. [Brief explanation of the drawing]

[0014] [Figure 1](a) is a top view showing the booth according to an embodiment of the present invention as viewed from above, and (b) is a partial top view showing the booth door in the fully open state. [Figure 2] A front view showing the appearance of the booth shown in FIG. 1 as viewed from the front. [Figure 3] An enlarged cross-sectional view taken along line III-III of FIG. 2. [Figure 4] An enlarged view of the vicinity of the hinge in FIG. 2. [Figure 5] An enlarged cross-sectional view taken along line V-V of FIG. 3. [Figure 6] A perspective view showing the hinge in FIG. 1 alone. 6] [Figure 7] A front view showing an excerpt of the hinge in FIG. 4. 9] [Figure 8] An enlarged cross-sectional view showing the state of the hinge in FIG. 1(b) with the same cross-section as FIG. 3. [Figure 9] A partial exploded perspective view showing a modified example of the hinge provided with a normally open gravity hinge mechanism according to an embodiment. [Figure 10] (a) A developed view schematically showing the phase of the inclined cam surface in the normally open state of the normally open gravity hinge mechanism in FIG. 9, and (b) is a developed view schematically showing the phase of the inclined cam surface in the fully open state of this normally open gravity hinge mechanism. [Figure 11] (a) A developed view schematically showing the phase of the inclined cam surface in the normally open state of a modified example of the normally open gravity hinge mechanism, and (b) is a developed view schematically showing the phase of the inclined cam surface in the fully open state of this modified example.

Embodiments for Carrying Out the Invention

[0015] The booth and the hinge according to an embodiment as an example of the present invention will be described based on the attached drawings.

[0016] The booths shown in Fig. 1(a) and Fig. 2 are partitioned indoors or outdoors by partition walls 1 to 5, and have a structure in which an entrance / exit 6 for people to enter and exit the partitioned room is opened and closed by an inward-opening door 7. Hereinafter, the horizontal direction in which the entrance / exit 6 opens to the inside and outside of the room is defined as the front-rear direction (hereinafter simply referred to as the "front-rear direction") in this booth. In this front-rear direction, the direction facing the outside of the room is defined as the front, and the direction facing the inside of the room is defined as the rear. Also, the direction perpendicular to the horizontal direction is defined as the up-down direction (hereinafter simply referred to as the "up-down direction") in this booth. Further, the horizontal direction perpendicular to the front-rear direction is defined as the left-right direction (hereinafter simply referred to as the "left-right direction") in this booth.

[0017] The entrance / exit 6 is an opening that penetrates the space between the first partition wall 1 and the second partition wall 2 in the front-rear direction. The first partition wall 1 is located on one side (left or right) of the entrance / exit 6 in the left-right direction, and the second partition wall 2 is located on the other side (right or left) of the entrance / exit 6 in the left-right direction. The suspension side of the door 7 and the first partition wall 1 are connected by a plurality of hinges 8 arranged in the up-down direction. By this connection, the door 7 is suspended only by the first partition wall 1.

[0018] This booth is provided with a lock 9 for the person entering the room to lock from the inside of the room. The lock 9 is for restricting the door 7 in the closed-door position that closes the entrance / exit � in the front-rear direction. The lock 9 is equipped with an emergency unlocking device that can be unlocked from the outside using a predetermined tool. Note that, in the illustrated example, a mortise lock is shown for the lock 9, but it is not limited to this, and it may be changed to other types of locks such as a slide latch lock or a cylinder lock.

[0019] The door panel surface 10 located on the front surface of the door 7 and the indoor wall surface 11 located on the rear surface of the first partition wall 1 are each flat along the up-down direction and the left-right direction.

[0020] As shown in Figures 3 to 5, hinge 8 has a first wing 21 fixed to the first partition wall 1, a second wing 22 fixed to the door 7, and an intermediate hinge 23 fixed to the first partition wall 1 at a height between the first wing 21 and the second wing 22.

[0021] As shown in Figures 5 to 7, the first wing 21 has a first shaft cylinder 25 into which the lower end of the first hinge shaft 24 is inserted, and a first wing plate 26 that is fastened to the first partition wall 1. The second wing 22 has a second shaft cylinder 28 into which the upper end of the second hinge shaft 27 is inserted, and a second wing plate 29 that is fastened to the door 7.

[0022] The first and second wing plates 26 and 29 are each rectangular in shape and are seamlessly connected to the corresponding first shaft cylinder 25 or second shaft cylinder 28 on one side. Furthermore, the first and second wing plates 26 and 29 each have multiple counterbore holes 30 and 31 that penetrate in the thickness direction. These counterbore holes 30 and 31 are for fastening to corresponding fixing points with screws. Countersunk screws (not shown) and the first or second fastening plates 34 and 35, each having a corresponding screw boss, are used for this fastening. The first wing plate 26 or the second wing plate 29 corresponding to the interior wall surface 11 of the first partition wall 1 or the door panel surface 10 of the door 7 are placed on top of each other, the corresponding first fastening plate 34 or the second fastening plate 35 is inserted into the corresponding hole in the first partition wall 1 or the door 7, and the aforementioned countersunk screws are screwed into the screw boss portion of the corresponding first fastening plate 34 or the second fastening plate 35 from the corresponding counterbore hole 30 or 31 side, thereby fastening the corresponding first partition wall 1 or door 7 between the corresponding first wing plate 26 or the second wing plate 29 and the corresponding first fastening plate 34 or the second fastening plate 35 in the front-to-back direction, thereby fixing the corresponding first wing 21 or the second wing 22 to the corresponding first partition wall 1 or door 7.

[0023] The intermediate hinge 23 includes a first intermediate shaft cylinder 40 into which the upper end of the first hinge shaft 24 is inserted, a second intermediate shaft cylinder 41 into which the second hinge shaft 27 is inserted, and an intermediate plate 42 provided integrally with these first and second intermediate shaft cylinders 40 and 41.

[0024] The first and second shaft cylinders 25, 28 and the first and second intermediate shaft cylinders 40, 41 are tubular sections capable of horizontally supporting the corresponding first hinge shaft 24 or second hinge shaft 27 when the door 7 is suspended from the first partition wall 1. This support maintains both axes of the first and second hinge shafts 24, 27 within a predetermined range of parallelism and is generally oriented in the vertical direction (see Figures 2 and 5).

[0025] Furthermore, since caps are attached to the lower end of the first shaft cylinder 25, the upper end of the first intermediate shaft cylinder 40, the upper end of the second shaft cylinder 28, and the lower end of the second intermediate shaft cylinder 41 to close the openings of the cylinders, the first and second hinge shafts 24 and 27 are not exposed.

[0026] The hinge 8 is configured such that, when the first hinge shaft 24 is inserted into the first shaft cylinder 25 and the first intermediate shaft cylinder 40, and the second hinge shaft 27 is inserted into the second shaft cylinder 28 and the second intermediate shaft cylinder 41, and the first and second hinge shafts 24 and 27 are facing the same direction and the hinge 8 exists alone, the intermediate hinge 23 and the first wing 21 are able to rotate 360° relative to each other around the first hinge shaft 24, and the intermediate hinge 23 and the second wing 22 are able to rotate 360° relative to each other around the second hinge shaft 27.

[0027] As shown in Figures 1, 2, and 5, the intermediate hinge 23 is fixed to the interior wall surface 11 of the first partition wall 1. The fixing structure of the intermediate hinge 23 to the first partition wall 1 consists of an intermediate plate 42, a screw member 43, a hole 44 provided in the first partition wall 1, and a first fastening plate 34.

[0028] As shown in Figures 5 to 7, the intermediate plate 42 has a threaded portion 45 as a fastening part for applying a fastening force between the intermediate plate 42 and the interior wall surface 11 of the first partition wall 1 in a direction perpendicular to the first hinge axis 24 and the second hinge axis 27, and one end face 46 aligned in a direction perpendicular to the axis of the threaded portion 45. The threaded portion 45 is an open female screw hole in the one end face 46. A corresponding screw member 43 is screwed into the threaded portion 45.

[0029] In the illustrated example, one end face 46 is the front end face of the intermediate plate 42 and is aligned in the vertical and horizontal directions. The axis of the threaded portion 45 is in the front-rear direction, and the direction of the axial force due to the screwing of the threaded member 43 and the threaded portion 45 is in the front-rear direction. The axes of the first and second intermediate shaft cylinders 40 and 41 are in the vertical direction. A counterbore hole 47 corresponding to the threaded member 43 is formed on the front side of the first fastening plate 34. The counterbore hole 47 communicates in the front-rear direction with the hole 44 in the first partition wall 1 when the first fastening plate 34 is fixed to the first partition wall 1 together with the first wing 21. The threaded member 43 can be threaded into the threaded portion 45 in the front-rear direction by passing it through the hole 44 from the counterbore hole 47 side which is on the outdoor side. Therefore, sufficient fastening force is secured in a direction perpendicular to the first hinge shaft 24 and the second hinge shaft 27, which extend generally in the vertical direction, allowing the intermediate hinge 23 to be fixed in a prone position on the interior wall surface 11 of the first partition wall 1. Furthermore, the screw member 43 used for fixing becomes an operating part located on the exterior side of the first partition wall 1. That is, by connecting a corresponding screwdriver to the head of the screw member 43 from the exterior and performing a predetermined operation of turning the screw member 43 toward the unscrew side, the fixing of the intermediate hinge 23 to the first partition wall 1 can be released.

[0030] The hanging operation of the door 7 to the first partition wall 1 using multiple hinges 8 can be performed as described above with each first hinge shaft 24 inserted into the first shaft cylinder 25 of each first wing 21 and the first intermediate shaft cylinder 40 of each intermediate hinge 23, which are fixed to the first partition wall 1. Then, with each second hinge shaft 27 inserted into the second intermediate shaft cylinder 41 of each intermediate hinge 23 fixed to the first partition wall 1 or the second shaft cylinder 28 of each second wing 22 fixed to the door 7, the connection between the hinge side of the door 7 and the first partition wall 1 is completed by inserting each second hinge shaft 27 into the second shaft cylinder 28 on the door 7 side or the second intermediate shaft cylinder 41 on the first partition wall 1 side. With this connection complete, the intermediate hinge 23, which is fixed in a prone position on the interior wall surface 11 of the first partition wall 1, can rotate relative to the second wing 22 fixed to the door 7 around the second hinge axis 27, but cannot rotate relative to the first wing 21 fixed to the first partition wall 1.

[0031] In the illustrated example, as described above, when the intermediate hinges 23 of each hinge 8 connecting the door 7 and the first partition wall 1 are fixed to the first partition wall 1 in the normal operating state, the door 7 in the closed position is located behind the first and second partition walls 1 and 2, and the door 7 is facing the second partition wall 2 in the front-to-back direction. Therefore, the entrance / exit 6 cannot be opened unless the door 7 is rotated inward around the second hinge axis 27.

[0032] If the door 7 is locked in the closed position by the lock 9 and an occupant falls inside the booth due to injury or illness, a rescue worker will need to open the door 7 from outside. First, the rescue worker unlocks the lock 9 and pushes the door 7 inward. At this time, the fallen occupant may get in the way and prevent the door 7 from opening completely. In such a case, the rescue worker removes each screw member 43 from outside to release the intermediate hinges 23 from the first partition wall 1, and then pushes the hinge side of the door 7 inward. This causes each intermediate hinge 23 to rotate inward around each first hinge axis 24 relative to each first wing 21, changing its position to one that is upright relative to the interior wall surface 11 of the first partition wall 1. Along with this upright rotation, each second wing 22 on the door 7 side rotates relative to each second hinge axis 27. As a result, as shown by the solid lines in Figures 1(b) and 8, the door 7 is moved away from the first and second partition walls 1 and 2 towards the interior by the amount of the upright rotation of the intermediate hinge 23. Consequently, the leading edge of the door 7 is displaced to a position where it faces the entrance / exit 6 in the front-to-back direction (i.e., the door 7 does not face the second partition wall 2 in the front-to-back direction), and a distance is secured between the first and second partition walls 1 and 2 and the door 7 to rotate the door 7 outward by a predetermined angle or more around each second hinge axis 27 relative to each intermediate hinge 23. Therefore, if a rescue worker rotates the door 7 outward around each second hinge axis 27 relative to each intermediate hinge 23, an emergency entrance 12 communicating with the entrance / exit 6 is opened between the door 7 and the second partition wall 2, as shown by the dashed lines in Figures 1(b) and 8. This allows rescue workers to enter the booth through the emergency entrance 12 without removing door 7 from the first partition wall 1. Therefore, even with only one rescue worker, it is easy to open door 7 in an emergency and rescue the person who has fallen inside.

[0033] In the illustrated example, the upright angle θ of the intermediate hinge 23 relative to the interior wall surface 11 of the first partition wall 1 is large, and the door 7 abuts against the door frame of the first partition wall 1, stopping its rotation toward the outside. However, a contact point that restricts the intermediate hinge 23 from rising beyond a predetermined angle may be provided in a part of the first partition wall 1 other than the door frame. Furthermore, the emergency entrance 12 only needs to be wide enough for a person to easily pass through, and usually, if the width of the emergency entrance 12 (i.e., the shortest distance between the second partition wall 2 and the door 7) is 300 mm or more, there will be no hindrance to rescue operations. Therefore, the upright angle θ that allows the intermediate hinge 23 to rotate toward the inside around the first hinge axis 24 from its fixed position relative to the interior wall surface 11 of the first partition wall 1 should be set so that the width of the emergency entrance 12 is 300 mm or more.

[0034] This booth is as described above, and comprises an inward-opening door 7 that opens and closes an entrance / exit 6 provided between a first partition wall 1 and a second partition wall 2, a plurality of hinges 8 that connect the hinge side of the door 7 to the first partition wall 1, and a lock 9 for locking the door 7, with each of the plurality of hinges 8 having a first wing 21 fixed to the first partition wall 1 and a second wing 22 fixed to the door 7.

[0035] Furthermore, this booth has intermediate hinges 23 such that each of the multiple hinges 8 rotates relative to the first wing 21 around the first hinge axis 24 and relative to the second wing 22 around the second hinge axis 27. The intermediate hinges 23 are fixed to the interior wall surface 11 of the first partition wall 1 in such a state that they can rotate relative to the second wing 22 but cannot rotate relative to the first wing 21. In the normal state, when each intermediate hinge 23 of each hinge 8 connecting the inward-opening door 7 to the first partition wall 1 is fixed to the interior wall surface 11 of the first partition wall 1, each second wing 22 fixed to the door 7 is in a state that allows it to rotate relative to each intermediate hinge 23 fixed to the first partition wall 1 around each second hinge axis 27, and the door 7 can be opened and closed exclusively around each second hinge axis 27.

[0036] Furthermore, this booth has a fixing structure for the intermediate hinge 23 to the first partition wall 1, which includes a screw member 43 as an operating part located on the exterior side of the first partition wall 1. By applying a predetermined operation to the operating part (screw member 43) from the outside, the intermediate hinge 23 is released, allowing it to rotate inward around the first hinge axis 24. This makes it easy for workers to release the fixing of each intermediate hinge 23 from the outside, and also allows workers to easily release each intermediate hinge 23. After performing the lock release operation and the locking operation of the lock 9, pushing the door 7 inward applies torque to each intermediate hinge 23 around each first hinge shaft 24 via each second hinge shaft 27. This causes each intermediate hinge 23 to rotate inward around each first hinge shaft 24 relative to each first wing 21 fixed to the first partition wall 1, moving the door 7 away from the first and second partition walls 1 and 2, and allowing the door 7 to be moved to a position where it can be rotated outward around each second hinge shaft 27.

[0037] Furthermore, this booth is designed such that when the lock 9 is unlocked and the intermediate hinge 23 is released, the door 7 is pushed inward, causing the intermediate hinge 23 to rotate inward around the first hinge axis 24, and the door 7 is rotated outward around the second hinge axis 27, thereby opening an emergency entrance 12 between the door 7 and the second partition wall 2. Therefore, if a worker moves the door 7 away from the first and second partition walls 1 and 2 as described above, and rotates it outward around each second hinge axis 27, the leading edge of the door 7 will face outward, opening the space between the door 7 and the second partition wall 2, and thus opening the emergency entrance 12.

[0038] Therefore, this booth can create an emergency entrance 12 between the door 7 and the second partition wall 2 without removing the inward-opening door 7, which opens and closes the entrance / exit 6, from the first partition wall 1.

[0039] Furthermore, this hinge 8 (see Figures 4 to 7) comprises a first wing 21, a second wing 22, and an intermediate hinge 23 that is rotatable relative to the first wing 21 around a first hinge shaft 24 and relative to the second wing 22 around a second hinge shaft 27 in the same direction as the first hinge shaft 24. The intermediate hinge 23 has a first intermediate shaft cylinder 40 into which the first hinge shaft 24 is inserted, a second intermediate shaft cylinder 41 into which the second hinge shaft 27 is inserted, and an intermediate plate 42 integrally provided with the first and second intermediate shaft cylinders 40 and 41. The intermediate plate 42 has a screw portion 45 as a fastening part for applying fastening force in a direction perpendicular to the first and second hinge shafts 24 and 27. Of the partition walls 1 and 2, the first partition wall 1, located on the hinge side of the door 7, is provided with a hole 44 that penetrates from inside to outside. The fastening portion (threaded portion 45) of the intermediate plate 42 and the corresponding fastening member, the threaded member 43, are screwed through the hole 44 in the first partition wall 1, and the fastening force is applied between the intermediate plate 42 and the interior wall surface 11 of the first partition wall 1, fastening the two 42 and 11 together. The intermediate hinge 23 can be fixed on the interior wall surface 11 so that the first and second intermediate shaft cylinders 40 and 41 face up and down. Furthermore, the fastening member (threaded member 43) is positioned on the exterior side of the first partition wall 1 as an operating part for releasing the fixing of the intermediate hinge 23 from outside, and the fixing of the intermediate hinge 23 can be released by a predetermined operation of turning the fastening member (threaded member 43). Furthermore, by determining the fixing positions of the first blade 21, the second blade 22, and the intermediate hinge 23 such that the first shaft cylinder 25 of the first blade 21 and the first intermediate shaft cylinder 40 of the intermediate hinge 23 are in a positional relationship where they face each other on the same axis, and the second shaft cylinder 28 of the second blade 22 and the second intermediate shaft cylinder 41 of the intermediate hinge 23 are in a positional relationship where they face each other on the same axis, it is possible to achieve a state in which the intermediate hinge 23 can rotate relative to the second blade 22 around the second hinge axis 27, but cannot rotate relative to the first blade 21 around the first hinge axis 24. Moreover, by releasing the fixing of the intermediate hinge 23, it is possible to achieve a state in which the intermediate hinge 23 can rotate relative to the first blade 21 around the first hinge axis 24, and can rotate relative to the second blade 22 around the second hinge axis 27.Therefore, by constructing this booth (see Figures 1 to 4) using this hinge 8, it is possible to create an emergency entrance 12 between the door 7 and the second partition wall 2 without removing the inward-opening door 7, which opens and closes the entrance / exit 6, from the first partition wall 1.

[0040] In the illustrated example, the threaded portion 45 of the intermediate hinge 23 is a female thread, and the threaded member 43, which serves as the operating part, is a male thread. However, it is also possible to reverse these two configurations, with a male thread erected on the intermediate hinge and a female thread such as a nut used as the operating part.

[0041] Furthermore, in the example shown in Figure 1, the door 7 is rotated by a rescue worker. However, by equipping at least one of the multiple hinges 8 connecting the door 7 and the first partition wall 1, for example, the bottom hinge 8, with a normally-opening gravity hinge mechanism, it is also possible to configure the door so that under normal circumstances, the door 7 is automatically opened inward by the normally-opening gravity hinge mechanism, and in the event of emergency opening, when the upright angle of the intermediate hinge 23 exceeds a predetermined value, the door is automatically opened outward by the normally-opening gravity hinge mechanism.

[0042] Here, the normally-opening gravity hinge mechanism converts the weight of the door into rotational torque through the sliding of an inclined cam surface fixed to the door side and an inclined cam surface fixed to the partition wall side. This conversion structure itself is well known (for example, Japanese Utility Model Publication No. 60-40780, Japanese Patent Publication No. 2016-108788, and Japanese Patent Publication No. 2018-168696). Therefore, a detailed explanation will be omitted below, and only an overview will be given.

[0043] Specifically, as shown in Figures 9 and 10, a sleeve 51 fixed to the second vane 22, which is a component of the normally-open gravity hinge mechanism, and a sleeve 52 fixed to the intermediate hinge 23 are arranged opposite each other in a direction along the second hinge axis 27. The opposing ends of these two sleeves 51 and 52 are provided with inclined cam surfaces 53 to 56 that can slide against each other in the direction around the second hinge axis 27. Here, the magnitude of the gradient of the inclined cam surfaces 53 to 56 is set to be the same for all of them, and each is formed over a range of slightly less than 180°.

[0044] When the intermediate hinge 23 is in the fixed position as shown in Figure 1(a), as shown in Figure 10(a), the sleeve 51 on the door 7 side and the sleeve 52 on the first partition wall 1 side can only come into contact at the inclined cam surface 53 of sleeve 51 and the inclined cam surface 55 of sleeve 52. At this contact point, the weight of the door 7 is converted into a force that moves it to the left in the figure (corresponding to the torque that rotates the door 7 inward around the second hinge axis 27 in Figure 1(a)). On the other hand, when the door 7 is opened in an emergency, as shown in Figure 1(b), if the hinge side of the door 7 is pushed to raise the upright angle θ of the intermediate hinge 23 to a predetermined level, as shown in Figure 10(b), the sleeve 51 on the door 7 side and the sleeve 52 on the first partition wall 1 side can come into contact only at the inclined cam surface 54 of the sleeve 51 and the inclined cam surface 56 of the sleeve 52. At this contact point, the weight of the door 7 is converted into a force that moves it to the right in the figure (corresponding to the torque that rotates the door 7 outwards around the second hinge axis 27 in Figure 1(b)).

[0045] When the top of the boundary between the inclined cam surfaces 53 and 54 of sleeve 51, as shown in Figure 10(a), crosses over the top of the boundary between the inclined cam surfaces 55 and 56 of sleeve 52, the state shown in Figure 10(b) is reached, and the door 7 is biased by the normally-open gravity hinge mechanism to rotate outwards. Therefore, if a rescue worker lightly pushes the hinge side of door 7 inwards at the position shown in Figure 1(b), the door 7 will automatically rotate due to the normally-open gravity hinge mechanism, and the emergency entrance 12 will open.

[0046] Furthermore, the angle at which the door 7 automatically rotates toward the interior under normal conditions, as shown in Figure 1(a), and the angle at which the door 7 automatically rotates toward the exterior from the position shown in Figure 1(b), can be appropriately set based on the distribution of the lengths around the second hinge axis 27 of the inclined cam surfaces 53 to 56.

[0047] For example, in the example shown in Figure 1(b), if the door 7 is designed to automatically rotate outwards to open the emergency entrance 12 when the upright angle θ of the intermediate hinge 23 reaches slightly over 30° during emergency opening, it is possible to distribute the door so that it rotates automatically by about 150° inwards from the closed position during normal operation. However, in the example shown, there is not enough space for the door 7 to rotate automatically by 150°, and the door 7 hits the partition wall 3 and stops at about 90°.

[0048] Furthermore, in the case where, in the emergency opening, the door 7 is designed to automatically rotate outwards to open the emergency entrance 12 when the upright angle θ of the intermediate hinge 23 becomes slightly over 60°, it is possible to distribute the rotation so that, under normal circumstances, the door 7 automatically rotates 90° or more (up to approximately 120°) inwards from the closed position.

[0049] Recently, there has been a demand for a configuration in which, under normal circumstances, the door 7 is held open to the interior by approximately 60° using a normally open gravity hinge mechanism, so that the occupant can close the door 7 with their elbow or knee without touching it with their hand. In this case, as shown in Figure 11(a) as a modified example, by forming inclined cam surfaces 53 and 55 over a range of slightly less than 120°, for example, and inclined cam surfaces 54 and 56 over a range of slightly less than 240°, it is possible to create a configuration in which the door is held open to the interior by approximately 60° under normal circumstances, and in the event of emergency opening, when the upright angle θ of the intermediate hinge becomes slightly more than 60°, the door 7 automatically rotates outward.

[0050] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. Accordingly, the scope of the invention is indicated by the claims and all modifications within the meaning and scope equivalent to the claims are intended.

[0051] For example, in this embodiment, the fastening portion of the intermediate plate is a threaded portion, and a threaded member serving as an operating portion is inserted from the outside and screwed in. However, the present invention is not limited to this, and the fastening portion may be configured such as having a male thread embedded in the intermediate plate facing outwards, and a cap nut serving as an operating portion being screwed in from the outside. Alternatively, a fastening bolt with a stepped groove formed at its tip may be embedded so as to protrude from the intermediate plate toward the outside, and a spring clip or the like may be engaged with this stepped groove from the outside to generate a fastening force that pulls the intermediate plate towards the first partition wall. [Explanation of Symbols]

[0052] 1. First partition wall 2. Second partition wall 6 Entrance / Exit 7 doors 8 hinges 9 locks 11 Interior wall surface 12 Emergency Entrance 21 First Feather 22 The second feather 23 Intermediate hinge 24 First hinge axis 27 Second hinge axis 40 First intermediate shaft cylinder 41 Second intermediate shaft cylinder 42 Intermediate plate 43 Screw component (operating part) 45 Threaded part

Claims

[Claim 1] The structure comprises an inward-opening door for opening and closing an entrance / exit located between a first partition wall and a second partition wall, a plurality of hinges connecting the hinge side of the door to the first partition wall, and a lock for locking the door. In a booth where each of the aforementioned multiple hinges has a first wing fixed to the first partition wall and a second wing fixed to the door, Each of the aforementioned plurality of hinges further has an intermediate hinge that rotates relative to the first wing about a first hinge axis and relative to the second wing about a second hinge axis. The intermediate hinge is fixed to the interior wall surface of the first partition wall such that it is rotatable relative to the second wing but not rotatable relative to the first wing. The fixing structure for the intermediate hinge to the first partition wall has an operating part located on the exterior side of the first partition wall, and is provided such that by applying a predetermined operation to the operating part from the exterior, the intermediate hinge can be released and rotated toward the interior side around the first hinge axis. A booth characterized in that, when the lock is unlocked and the intermediate hinge is released, the door is pushed inward, causing the intermediate hinge to rotate inward around the first hinge axis, and the door is rotated outward around the second hinge axis, thereby creating an emergency entrance between the door and the second partition wall.

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