JP7579099B2 - Powered fire door system - Google Patents

Description

The present invention relates to a fire door device, and in particular to an electrically operated fire door that can be opened and closed using a linear motor, and is an ideal fire door device for the entrance door of an apartment building.

An automatic door device that uses a linear motor to drive a sliding door has been developed (see Patent Document 1).
A linear motor has a simple structure consisting of a permanent magnet and a coil unit, and can drive a sliding door smoothly and stably, allowing heavy fire doors to be opened and closed smoothly. However, since fire doors achieve their fireproofing characteristics by closing the passageway, it is important that they are always closed when no one is passing through. Since fire doors become heavy in order to achieve the prescribed fireproofing characteristics, a structure driven by a linear motor can achieve the feature of smooth opening and closing with the driving force of the linear motor. However, it is not easy for a door device that opens and closes a heavy fire door with a linear motor to open and close smoothly while maintaining the optimal speed for a long period of time, and this is a factor that hinders the electrification of fire doors.

In order to inexpensively realize a fire door with the specified fire-resistant characteristics, the conventional fire door device is structured so that a heavy fire door runs along an inclined rail by its own weight to close. With this fire door device, the movement of the fire door is determined by the relationship between the inclination angle of the inclined rail and the weight of the fire door. For example, if the inclination of the inclined rail is too steep or the door body is too heavy, it becomes difficult to open and close the fire door smoothly, and there is also the disadvantage of consuming a lot of driving power. On the other hand, if the inclination of the inclined rail is too gentle or the door body is too light, it becomes difficult to close the door quickly when the power is turned off due to a power outage or the like. Here, since the weight of the fire door varies depending on the material, shape, size, etc. of the door body, it is difficult to find the optimal inclination angle each time, and it may also change depending on the construction accuracy, etc., so it is convenient to use it by making the inclination angle of the inclined rail adjustable.

JP 2004-131993 A

The present invention was developed with the aim of eliminating the above-mentioned drawbacks of the conventional system, and an important objective of the present invention is to provide an electrically operated fire door device that can stably open and close heavy fire doors for long periods of time.

Means for solving the problem and effects of the invention

An electric fire door device according to one embodiment of the present invention comprises a sliding fire door, a running platform with wheels connected to the fire door in a suspended structure, a rail bar with rails on which the wheels run, a fixed bar that is itself fixed to the building and fixed in a structure that allows the rail bar to be detached, a linear motor provided on the running platform and rail bar to move the running platform along the rail bar, and a control circuit that controls the linear motor to move the running platform along the rail bar. The fire door device comprises a locking mechanism that detachably connects the rear end of the rail bar to the fixed bar, and an inclination angle adjustment mechanism that adjusts the inclination angle of the rail bar that is arranged at a downward gradient from the rear end to the tip and connects the tip to the fixed bar. The fixed bar has a full length extending to both ends of the rail bar and has fixed ribs on the side edges of a vertical plate of a specified vertical width, and the locking mechanism has a clamping arm that is fixed to the vertical plate of the fixed bar and clamps the rear end of the rail bar between it and the vertical plate, and is connected so that it can be freely pulled out in the longitudinal direction. The rear end of the rail bar is placed on the fixed rib and connected to the fixed bar via the clamping arm, and the inclination angle adjustment mechanism adjusts the vertical position of the end on the door tip side and fixes it to the fixed bar.

However, in this specification, the "rear end" of the fixed bar and rail bar refers to the end on the tail side, and the "tip" refers to the end on the front side.

The above-mentioned electric fire door device has the advantage that the heavy fire door can be moved by the driving force of the linear motor as well as the weight of the fire door due to the inclination angle of the rail bar, so that the fire door can be closed reliably for a long period of time. Furthermore, in the above-mentioned fire door device, the rail bar along which the fire door moves is fixed to the building via a locking mechanism, an inclination angle adjustment mechanism, and a fixed bar, so that during maintenance, the rail bar, part of which is placed inside the door pocket, can be removed from the building for inspection, and the inclination angle of the rail bar, which is placed on a downward slope, can be adjusted with the inclination angle adjustment mechanism to close the heavy fire door stably and reliably by its own weight, thereby achieving reliable fire protection characteristics.

Inspection of the rail bar is easy because the rear end of the rail bar, which is connected in a hidden position at the back of the door pocket, can be easily removed by pulling it out, and can also be easily pushed in to connect it to a fixed position without any vertical misalignment. This feature is achieved by placing the rear end of the rail bar on the fixed rib of the fixed bar fixed to the building and pushing it into the door pocket, and then inserting it between the clamping arm and the vertical plate of the fixed bar to connect it. The rear end of the rail bar, which is inserted into the door pocket while placed on the fixed rib of the fixed bar, is prevented from misaligning in the vertical direction by the fixed rib that supports it from below. The clamping arm clamps the rail bar, which is inserted in the longitudinal direction, between the clamping arm and the vertical plate to connect it to the fixed bar. The rail bar, whose rear end is connected to the fixed bar by the clamping arm while resting on the fixed rib, is placed on the fixed bar and connected without any vertical misalignment. In this state, the rear end of the rail bar fixed to the building is connected to the fixed bar by both the clamping arm and the fixed rib, but the fixed rib is an integral structure with the fixed bar fixed to the building and has sufficient strength to withstand the load of a heavy fire door. The clamping arm clamps the rail bar between itself and the vertical plate to prevent the rail bar from shifting horizontally, but the load of the heavy fire door acts vertically, not horizontally. Therefore, the clamping arm only needs to be strong enough to clamp the rail bar between itself and the vertical plate and position it in a fixed position. Therefore, the clamping arm can be realized, for example, by an elastically deformable metal plate whose end is fixed to the vertical plate.

Furthermore, in the above fire door device, the rear end of the rail bar is connected to a fixed position of the fixed bar by a clamping arm, and the tip end is adjusted to an optimal angle of inclination of the downward slope by an inclination adjustment mechanism, so that the heavy fire door runs on the downward slope rail bar by its own weight, so that the running condition can be adjusted to an ideal condition by the inclination angle of the rail bar. The rail bar is fixed to the building at a downward slope from the end side to the end side so that the fire door can be closed by its own weight. The fire door device can be opened and closed by both the inclination angle of the rail bar and the driving force of the linear motor, but the driving force of the linear motor cannot be prevented from decreasing over time, and the driving force decreases under various conditions, so it cannot be kept constant for a long period of time. This is because the driving force of the linear motor fluctuates due to demagnetization of the permanent magnet and changes in the dimensions of the permanent magnet and the coil unit. Permanent magnets cannot be prevented from demagnetizing over time and losing their magnetic force. For example, neodymium magnets, which are preferably used in linear motors, are easily demagnetized when the temperature increases, and are also easily demagnetized even when they become thinner, and their magnetic force gradually decreases when used. To reduce demagnetization, it is recommended that neodymium magnets be stored at a temperature of 50°C or less; however, in real-life usage environments, especially in extremely hot summer environments, it is impossible to prevent the temperature from rising, and the rise in temperature causes demagnetization. In particular, linear motors for doors use long permanent magnets that run along the distance traveled to open and close the door, so they are made thin to reduce costs, but this also results in a shape that is prone to demagnetization.

Furthermore, in a linear motor, changes in the gap between the permanent magnet and the coil unit also cause changes in the driving force, but in a real-life usage environment, it is not possible to keep the gap between the permanent magnet and the coil unit constant for a long period of time. The gap between the permanent magnet and the coil unit occurs, for example, due to wear on the wheels that move a heavy fire door, or deformation of the components due to the weight of the heavy fire door, so it is impossible to completely eliminate fluctuations in the gap in a fire door device that is used for a long period of time.

The above fire door device moves the fire door in the closing direction using both the driving force of the linear motor and the driving force of the weight of the heavy fire door moving on the downwardly sloping rail bar, so by adjusting the inclination angle of the rail bar, the fire door can be reliably closed at an optimal speed for a long period of time. Furthermore, the above fire door device connects the rear end of the rail bar to a fixed bar with a locking mechanism, and adjusts the inclination angle by moving the tip end up and down with an inclination angle adjustment mechanism, so the inclination angle can be easily adjusted to move the fire door at an ideal speed. For example, when the driving force of the linear motor is reduced, the inclination angle of the rail bar can be increased to close the heavy fire door smoothly. Conversely, when the installation precision is poor and the inclination is steep, the inclination angle of the rail bar can be reduced to open the heavy fire door smoothly.

In another embodiment of the present invention, the electric fire door device has a rail bar with an adjustable rib arranged opposite the fixed rib, and the tilt angle adjustment mechanism adjusts the gap between the fixed rib and the adjustable rib to adjust the tilt angle of the rail bar.

In another embodiment of the present invention, the electric fire door device has a rail bar with an adjustment rib located below a fixed rib provided on the upper edge of the fixed bar, and the tilt angle adjustment mechanism adjusts the gap between the fixed rib and the adjustment rib to adjust the tilt angle of the rail bar.

In another embodiment of the present invention, the electric fire door device has a rail bar with an adjustment rib located above a fixed rib provided on the lower edge of the fixed bar, and the tilt angle adjustment mechanism adjusts the gap between the fixed rib and the adjustment rib to adjust the tilt angle of the rail bar.

In another embodiment of the present invention, the electric fire door device has an inclination angle adjustment mechanism that includes an adjustment screw that is fixed in a vertical position to a fixed rib and an adjustment nut that is screwed onto the adjustment screw, the adjustment rib has a through hole for the adjustment screw, and the inclination angle adjustment mechanism is structured so that, with the adjustment screw inserted into the through hole of the adjustment rib, the adjustment nut is rotated to adjust the distance between the fixed rib and the adjustment rib, thereby adjusting the inclination angle of the rail bar.

The above electric fire door device has the advantage that the inclination angle of the rail bar can be adjusted by rotating the adjustment nut, making it possible to adjust the downward slope angle of the rail bar simply, easily and accurately.

Another embodiment of the present invention is an electrically operated fire door device in which the inclination adjustment mechanism has an adjustment screw, and one of the fixed rib and the adjustment rib has a through hole through which the adjustment screw can be rotatably inserted, and the other has a female threaded hole for the adjustment screw, and the inclination adjustment mechanism inserts the adjustment screw into the through hole and screws the tip into the female threaded hole to adjust the distance between the fixed rib and the adjustment rib, thereby adjusting the inclination angle of the rail bar.

The above-mentioned electrically operated fire door device has the advantage that the inclination angle of the rail bar can be adjusted by rotating the adjustment screw, making it possible to adjust the downward slope angle of the rail bar simply, easily and accurately.

In another embodiment of the electric fire door device of the present invention, a linear motor includes a coil unit which generates a moving magnetic field in the moving direction of the fire door, and a moving element which is driven and moved by the moving magnetic field of the coil unit . The moving element is connected to a running platform, the coil unit is fixed to a rail bar, and the moving element and the coil unit are arranged opposite each other above and below.

An electrically operated fire door device according to another embodiment of the present invention includes a non-contact sensor that controls a linear motor, and the linear motor drives the fire door in response to a signal from the non-contact sensor.

In another embodiment of the present invention, a non-contact sensor of an electric fire door system includes a camera for capturing an image of a person approaching the fire door , and a calculation circuit for processing the image captured by the camera.

1 is a schematic front view of a fire door apparatus according to an embodiment of the present invention; FIG. FIG. 2 is a schematic cross-sectional view of the fire door apparatus shown in FIG. 1. FIG. 2 is a front view of the fire door system shown in FIG. 1 . FIG. 4 is a cross-sectional view of the fire door device shown in FIG. 3 taken along line IV-IV. 4 is an enlarged cross-sectional view of the fire door device shown in FIG. 3 taken along the line VV. 6 is a cross-sectional view of the fire door device shown in FIG. 3 taken along line VI-VI. 7 is an enlarged cross-sectional view of the fire door device shown in FIG. 3 taken along line VII-VII. FIG. 11 is an enlarged cross-sectional view showing another example of the tilt angle adjustment mechanism. FIG. 11 is an enlarged cross-sectional view showing another example of the tilt angle adjustment mechanism.

The present invention will be described in detail below with reference to the drawings. In the following description, terms indicating specific directions or positions (e.g., "upper", "lower", and other terms including these terms) are used as necessary, but the use of these terms is for the purpose of facilitating understanding of the invention with reference to the drawings, and the meaning of these terms does not limit the technical scope of the present invention. In addition, parts with the same reference numerals appearing in multiple drawings indicate the same or equivalent parts or members.
Furthermore, the embodiments shown below are specific examples of the technical ideas of the present invention, and do not limit the present invention to the following. Furthermore, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described below are intended to be illustrative and not to limit the scope of the present invention. Furthermore, the contents described in one embodiment or example can be applied to other embodiments or examples. Furthermore, the sizes and positional relationships of the components shown in the drawings may be exaggerated to clarify the explanation.

(Embodiment 1)
Fig. 1 is a schematic front view of an electric fire door device, Fig. 2 is a schematic cross-sectional view of the electric fire door device shown in Fig. 1, Fig. 3 is a front view of the fire door device shown in Fig. 1, Fig. 4 is a cross-sectional view of the fire door device shown in Fig. 3 taken along line IV-IV, and Fig. 5 is an enlarged cross-sectional view of the fire door device shown in Fig. 3 taken along line V-V. The fire door device 100 shown in these figures includes a sliding fire door 1, a running platform 11 to which wheels 12 are connected to connect the fire door 1 in a suspended structure, a rail bar 2 having a rail 21 on which the wheels 12 run, a fixed bar 3 which is itself fixed to the building frame and which fixes the rail bar 2 so that it can be detached, a linear motor 6 provided on the running platform 11 and the rail bar 2 to move the running platform 11 along the rail bar 2, and a control circuit 7 which controls the linear motor 6 to move the running platform 11 along the rail bar 2 to open or close the fire door 1. Furthermore, the above fire door device 100 includes a locking mechanism 4 that detachably connects the rear end of the rail bar 2 to the fixed bar 3, and an inclination angle adjustment mechanism 5 that adjusts the inclination angle of the rail bar 2 that is positioned at a downward slope.

[Fire Door 1]
The fire door 1 is a square-shaped sliding door that realizes fire-resistant properties, and has a structure that meets the properties stipulated by the Building Standards Act, and is only open when a person passing through has the door open of their own volition, otherwise it is always closed by a linear motor 6 and a downwardly sloping rail 21. The fire door 1 shown in the cross section of Figure 5 is connected to a running platform 11 with wheels 12 via a hanging metal fitting 14 fixed to the upper end surface, and is opened and closed as the running platform 11 moves.

[Running platform 11]
The running platform 11 has fixed thereto a plurality of wheels 12 which run along the rails 21 to move the fire door 1 in the opening and closing direction, and a long and thin permanent magnet 63 which is the mover 64 of the linear motor 6. The permanent magnet 63 of the mover 64 is disposed in a position extending horizontally along the upper edge of the running platform 11.

[Linear motor 6]
The linear motor 6 is composed of a coil unit 61 of a stator 62 and a permanent magnet 63 of a mover 64, and the moving magnetic field of the coil unit 61 moves the permanent magnet 63 of the mover 64 in the horizontal direction to open and close the fire door 1. The linear motor 6 has the permanent magnet 63 of the mover 64 connected to the running platform 11, the coil unit 61 of the stator 62 fixed to the rail bar 2, and the mover 64 and the stator 62 arranged to face each other vertically. The length of the permanent magnet 63 of the mover 64 is approximately equal to the width of the fire door 1, and the length of the coil unit 61 of the stator 62 is longer than that of the mover 64 so that the mover 64 is always positioned to face the mover 64 at a predetermined length when the fire door 1 is opened or closed, and can generate a driving force. The mover 64 has multiple permanent magnets 63 linearly arranged in the opening and closing direction of the fire door 1 with the surfaces facing the coil unit 61 alternately as N and S poles. The coil unit 61, which is the stator 62, has a plurality of coils 61a arranged in a straight line in the horizontal direction, which is the opening and closing direction of the fire door 1. Each coil 61a is arranged in a position where it radiates magnetic flux to the surface of the movable member 64 facing the permanent magnet 63, that is, in a position where the surface of the movable member 64 facing the permanent magnet 63 is alternately turned into N pole and S pole by the passing AC, or in other words, in a position where N pole and S pole are formed in the vertical direction in FIG. 5. The coil unit 61 controls the frequency, phase and voltage of the AC passing through each coil 61a by the control circuit 7, and moves the magnetic field generated by each coil 61a in the arrangement direction to generate a moving magnetic field. The coil unit 61 moves the permanent magnet 63 of the movable member 64 in the horizontal direction with the moving magnetic field. The control circuit 7 can increase the moving magnetic field of the coil unit 61 to increase the speed of the fire door 1 and strengthen the moving magnetic field to increase the driving force. The moving speed and driving force of the moving magnetic field are set in consideration of the weight of the fire door 1 so as to move it stably at an optimum speed while not causing too strong an impact when it collides with a human body.

[Control circuit 7 of linear motor 6]
The control circuit 7 controls the linear motor 6 with a signal from a non-contact sensor 71 that detects the timing to open the fire door 1. The non-contact sensor 71 preferably recognizes the face of a person approaching the fire door 1 and outputs a signal to the control circuit 7 for the linear motor 6 to open the fire door 1. The non-contact sensor 71 is a face recognition sensor 71A including a camera 72 that captures the face of a person approaching the fire door 1 and an arithmetic circuit 73 that processes the image of the camera 72. The face recognition sensor 71A stores a face image of a person who opens the fire door 1 in advance in a memory 74. The face recognition sensor 71A compares an input face image input from the camera 72 with a stored face image stored in the memory 74, and outputs an open signal for the fire door 1 to the control circuit 7 when the input face image and the stored face image match. When the control circuit 7 detects the open signal, it controls the linear motor 6 to open the fire door 1, and controls the linear motor 6 to close the fire door 1 after a predetermined time has passed. Since the fire door device 100 achieves fire protection by closing the open fire door 1, the open time of the fire door 1 is also stored in the control circuit 7. The face recognition sensor 71A detects the approach of a specific person, opens the fire door 1, and then controls the linear motor 6 to close the fire door 1 after the open time has elapsed. The fire door device 100, which uses the face recognition sensor 71A as the non-contact sensor 71, is particularly convenient to use since it can automatically open the fire door 1 without using a key.

However, the non-contact sensor 71 is not limited to the face recognition sensor 71A, and can be any sensor that recognizes fingerprints or pupil patterns, or any other sensor that detects the approach of a specific person, such as a card key. Furthermore, the fire door device 100 of the present invention does not limit the sensor that detects the signal to open the fire door 1 to the non-contact sensor 71, and can also use an input device such as a normal key or a numeric keypad that opens the fire door 1 by inputting specific numbers.

The running platform 11 shown in Figures 2 and 5 has wheels 12 connected to the top of the fire door 1 via hanging brackets 14 fixed to the top surface of the fire door 1. The wheels 12 are connected to both ends of the fire door 1, and suspend the fire door 1 in a horizontal position to move it along the rails 21. As shown in Figure 2, the permanent magnet 63 of the mover 64 has a length approximately equal to the width of the fire door 1, faces the coil unit 61, and is moved by the moving magnetic field of the coil unit 61.

The fire door device 100 in Fig. 1 and Fig. 3 opens and closes the fire door 1 at the entrance of a building, or at the building's passageway. When the fire door 1 is closed, it closes the building's passageway, and when it is open, it is stored in the door pocket 81 of the building. As shown in Fig. 4, the door pocket 81 is constructed by fixing the fixed bar 3 to the building frame 80, providing a predetermined gap 82 between the frame surface and the door pocket wall 83, and providing a space for storing the fire door 1 in the gap 82 between the building frame 80 and the door pocket wall 83. The door pocket 81 is a space for storing the sliding fire door 1, and the door pocket wall 83 is fixed to the building frame, so a structure that can be removed for maintenance of the fire door 1 is not adopted. In particular, the door pocket wall 83 in front of the door pocket 81 has the same design as the surrounding walls, so a structure that can be removed for maintenance is not adopted, and the door pocket wall 83 is almost always constructed as an integral structure with the building frame.

[Fixed bar 3]
The fixed bar 3 is fixed in a horizontal position to the building frame 80 which becomes the door pocket 81. However, since the rail bar 2 is fixed to the fixed bar 3 by adjusting the inclination angle, it is not necessary to fix it in an accurate horizontal position. The fixed bar 3 is fixed to the building frame 80 and the rail bar 2 is fixed to the surface. The rail bar 2 has a rail 21 which is moved by a running platform 11. The running platform 11 moves on the rail 21, and the fire door 1 is moved to the open position and the closed position. The fixed bar 3 is made of a long and thin metal plate longer than the rail bar 2 so that the rail bar 2 which moves the fire door 1 to the open position and the closed position can be fixed. The fixed bar 3 shown in Figs. 1 and 3 has a full length protruding from both ends of the rail bar 2 and has a fixed rib 32 on the side edge of a vertical plate 31 of a predetermined vertical width. As shown in the cross-sectional views of Fig. 2 and Fig. 5, the fixing bar 3 is formed by bending a metal plate of a predetermined width into a U-shaped cross section, and has fixing ribs 32 on both sides of the vertical plate 31. The fixing bar 3 shown in the cross-sectional view of Fig. 5 is a metal plate that connects the vertical plate 31 and the fixing rib 32 into an integral structure, and both side edges (upper and lower side edges in the figure) of the vertical plate 31 are fixed to the building frame 80 via base plates 35. The base plates 35 are metal plates fixed to the building frame 80, and the fixing bar 3 is fixed by welding. The base plates 35 in Fig. 5 are composed of a first base plate 35A to which the fixing bar 3 is welded, a second base plate 35B to which the first base plate 35A is fixed, and a third base plate 35C to which the second base plate 35B is fixed, and the third base plate 35C is fixed to the building frame 80.

The fire door device 100 in FIG. 5 has an inspection hatch cover 37 connected to the leading edge of a top plate 36 provided on the upper edge of the second base plate 35B. To connect the inspection hatch cover 37, a locking metal fitting 38 for the inspection hatch cover 37 is fixed to the underside of the top plate 36. A locking rib 38a is provided at the lower end of the locking metal fitting 38, and the inspection hatch cover 37 is connected to the locking rib 38a. The inspection hatch cover 37 covers the top of the fire door 1 and conceals the running platform 11, wheels 12, rail bar 2, etc. provided on the top of the fire door 1. The inspection hatch cover 37 is connected so that it can be removed and attached, making it easy to maintain the fire door 1 when necessary.

In the above fire door device 100, the base plate 35 that fixes the fixed bar 3 to the building structure 80 is composed of a first base plate 35A, a second base plate 35B, and a third base plate 35C, and the fixed bar 3 is fixed to the building structure 80 via these base plates 35. However, the present invention does not specify the structure for fixing the fixed bar 3 to the building structure 80, and the fixed bar can be fixed to the building structure via base plates of other shapes, and the fixed bar can also be fixed directly to the building structure without using base plates.

[Rail bar 2]
The rail bar 2 shown in the cross-sectional view of FIG. 5 is a metal plate extending in the longitudinal direction of the fixed rail 21, with an adjustment rib 22 at the upper edge, a linear motor 6 in the middle, and a rail 21 at the lower edge. The rail bar 2 in this figure is composed of a first rail bar 2A and a second rail bar 2B, with the adjustment rib 22 provided on the first rail bar 2A and the rail 21 provided on the second rail bar 2B. In this rail bar 2, the first rail bar 2A is preferably made of high-strength iron to increase the bending strength of the adjustment rib 22, and the second rail bar 2B is preferably made of aluminum, which has little effect on the magnetic flux of the coil unit 61. The rail bar 2 is connected to the inside of the first rail bar 2A in an integral structure by a method such as welding or bonding, but it can also be fixed to an integral structure by a method other than these joining methods. The rail bar 2 can also be manufactured by molding the entire rail bar 2 into an integral structure using metal such as iron or aluminum.

The first rail bar 2A has its upper and lower edges bent inward to provide horizontal adjustment ribs 22. The upper and lower adjustment ribs 22 are located inside the fixed bar 3 and are arranged horizontally in parallel with the fixed rib 32 of the fixed bar 3. The second rail bar 2B has connecting ribs 23 that protrude inward on its upper and lower edges. The connecting rib 23 on the lower edge has a rail 21 attached to its tip edge, and the connecting rib 23 on the upper edge fixes the coil unit 61, which is the stator 62 of the linear motor 6, to its inside.

The rail bar 2 is fixed to the fixed bar 3, but can be removed from the fixed bar 3 for maintenance, and is fixed to the fixed bar 3 in a structure that allows the tilt angle to be adjusted. To fix the rail bar 2 to the fixed bar 3 in this structure, the rear end of the rail bar 2 is connected to the fixed bar 3 by a locking mechanism 4, and the front end is connected to the fixed bar 3 by a tilt angle adjustment mechanism 5.

[Lock mechanism 4]
The locking mechanism 4 is detachably connected at its rear end to the fixed bar 3 so that the rail bar 2 can be pulled out from the door pocket 81 whose surface is closed. As shown in Figs. 6 and 7, the locking mechanism 4 is provided with a clamping arm 41 that can pull out the rail bar 2 in the longitudinal direction to separate it from the fixed bar 3, and the clamping arm 41 connects the rail bar 2 to the fixed bar 3 in a tight contact state. The clamping arm 41 is a metal plate whose end opposite to the pulling direction (the left end in Figs. 1 and 3) is fixed to the vertical plate 31 of the fixed bar 3, and this metal plate is preferably an elastic arm plate 41A. At the end opposite to the fixed end of the clamping arm 41, an insertion gap 42 into which the rail bar 2 can be inserted is provided between the clamping arm 41 and the fixed bar 3. The clamping arm 41 of the elastic arm plate 41A makes the insertion gap 42 narrower than the thickness of the rail bar 2, so that the inserted rail bar 2 can be elastically connected to the fixed bar 3 in an extruded state. However, the clamping arm 41 does not necessarily have to be an elastic arm plate 41A, and the rail bar 2 can be connected in close contact with the fixed bar 3 by making the insertion gap 42 equal to the thickness of the rail bar 2. The clamping arm 41 shown in the enlarged cross-sectional view of Figure 7 has a shape in which the insertion gap 42 gradually becomes larger toward the opening, allowing the rail bar 2 to be inserted more smoothly.

The rail bar 2 is connected to the fixed bar 3 by the locking mechanism 4, but the weight of the heavy fire door 1 acts on the rail bar 2. In order for the rail bar 2 to withstand the weight of the fire door 1, the rear end of the rail bar 2 is placed on the fixed rib 32 provided on the lower edge of the fixed bar 3 and connected to the fixed bar 3. The locking mechanism 4 holds the rear end of the rail bar 2 between the fixed bar 3 and the rear end of the rail bar 2 in a position where it does not come off the fixed rib 32. The structure in which the lower edge of the rail bar 2 is placed on the fixed rib 32 and connected also realizes the feature that the rail bar 2 can be inserted into the closed door pocket 81 and easily connected to the fixed bar 3 detachably while supporting the end of the rail bar 2 with a supporting force that can withstand the weight of the heavy fire door 1. This is because the rear end of the rail bar 2 is placed on the fixed rib 32, the rail bar 2 is inserted into the door pocket 81 using the fixed bar 3 as a guide, and the rear end of the rail bar 2 is guided into the insertion gap 42 of the clamping arm 41 to be connected reliably.

[Tilt angle adjustment mechanism 5]
The inclination angle adjustment mechanism 5 adjusts the inclination angle of the rail bar 2 fixed to the fixed bar 3 on a downward gradient. After the inclination angle of the rail bar 2 is adjusted by the inclination angle adjustment mechanism 5, it is fixed to the fixed bar 3. The rail bar 2 is fixed to the fixed bar 3 so that it can be removed from the fixed bar 3 for maintenance. The structure for fixing the rail bar 2 to the fixed bar 3 in this manner is preferably as shown in the cross-sectional view of FIG. The rail bar 2 is fixed to the fixed bar 3 by screwing a set screw 33 that penetrates the rail bar 2 into the fixed bar 3. The rail bar 2 is provided with a slit 24 that extends in the vertical direction, and the set screw 33 is inserted into the slit 24 to fix the rail bar 2 to the fixed bar 3. The rail bar 2, which moves up and down by adjusting the inclination angle, can be fixed to the fixed bar 3 by screwing it into the fixed bar 3. Also, the inclination angle can be adjusted by a structure in which a tapping screw 34 is inserted through the rail bar 2 and screwed into the fixed bar 3. The adjusted rail bar 2 can be fixed to the fixed bar 3.

As shown in the cross-sectional view of FIG. 5, the inclination angle adjustment mechanism 5 provides a fixed rib 32 on the fixed bar 3 and an adjustment rib 22 on the rail bar 2, and arranges the fixed rib 32 and the adjustment rib 22 in opposing positions to adjust the gap 53 between the fixed rib 32 and the adjustment rib 22, thereby adjusting the inclination angle of the rail bar 2. The inclination angle adjustment mechanism 5 of FIG. 5 arranges the adjustment rib 22 provided on the upper edge of the rail bar 2 below the fixed rib 32 provided on the upper edge of the fixed bar 3, and adjusts the gap 53 between the fixed rib 32 and the adjustment rib 22 to adjust the inclination angle of the rail bar 2. This inclination angle adjustment mechanism 5 can narrow the gap between the fixed rib 32 and the adjustment rib 22, i.e., move the adjustment rib 22 upward, to reduce the downward inclination angle of the rail bar 2, and can widen the gap between the fixed rib 32 and the adjustment rib 22, i.e., move the adjustment rib 22 downward, to increase the downward inclination angle of the rail bar 2.

The inclination angle adjustment mechanism 5 in FIG. 5 adjusts the distance between the fixed rib 32 and the adjustment rib 22 with an adjustment screw 51. This inclination angle adjustment mechanism 5 fixes the adjustment screw 51 in a vertical position to the fixed rib 32 in a structure that does not rotate, and an adjustment nut 52 is screwed into the adjustment screw 51. The adjustment rib 22 of the rail bar 2 has a through hole 22a for the adjustment screw 51, and the adjustment screw 51 is inserted into the through hole 22a, and the adjustment nut 52 is screwed into the tip of the adjustment screw 51. The inclination angle adjustment mechanism 5 of this structure can adjust the distance between the fixed rib 32 and the adjustment rib 22 by rotating the adjustment nut 52, thereby adjusting the inclination angle of the rail bar 2. This inclination angle adjustment mechanism 5 screws the adjustment nut 52 into the adjustment screw 51, raises the adjustment rib 22, and reduces the inclination angle of the rail bar 2, and rotates in the opposite direction to loosen the adjustment nut 52, lowering the adjustment rib 22 and increasing the inclination angle of the rail bar 2.

The inclination angle adjustment mechanism 5 can also adjust the inclination angle of the rail bar 2 with the structure shown in FIG. 8. In the inclination angle adjustment mechanism 5 in this figure, the adjustment rib 22 is provided with a through hole 22a through which the adjustment screw 51 is rotatably inserted, and the fixed rib 32 is provided with a female screw hole 54 into which the adjustment screw 51 is screwed. The female screw hole 54 shown in the figure is provided by fixing a nut member 55 arranged coaxially with the through hole 32a opened in the fixed rib 32 to the fixed rib 32 by welding or the like. However, the female screw hole can also be provided by cutting a female screw in the fixed rib. In this inclination angle adjustment mechanism 5, the tip of the adjustment screw 51 inserted from bottom to top into the female screw hole 54 of the fixed rib 32 adjusts the distance between the fixed rib 32 and the adjustment rib 22 to adjust the inclination angle of the rail bar 2. By screwing in the adjustment screw 51, the adjustment rib 22 moves closer to the fixed rib 32, decreasing the inclination angle of the rail bar 2, and by rotating the adjustment screw 51 in the loosening direction, the distance between the adjustment rib 22 and the fixed rib 32 increases, increasing the inclination angle of the rail bar 2.

The above-mentioned inclination angle adjustment mechanism 5 adjusts the inclination angle of the rail bar 2 by screwing the adjustment screw 51 into a female screw hole 54 provided in the fixed rib 32, but the inclination angle adjustment mechanism can also be structured so that a through hole through which the adjustment screw can be rotatably inserted is provided in the fixed rib (not shown), and the female screw hole of the adjustment screw inserted into this through hole is provided in the adjustment rib. The female screw hole of the adjustment rib can be provided by fixing a nut member coaxially with the through hole opened in the adjustment rib, or by cutting a female screw into the adjustment rib. This inclination angle adjustment mechanism can screw in the adjustment screw to bring the adjustment rib closer to the fixed rib to reduce the inclination angle of the rail bar, and rotate the adjustment screw in the direction of loosening to widen the gap between the adjustment rib and the fixed rib, thereby increasing the inclination angle of the rail bar.

The inclination angle adjustment mechanism 5 adjusts the distance between the fixed rib 32 and the adjustment rib 22 by screwing the adjustment screw 51 into the female screw hole 54 provided in the fixed rib 32 or the adjustment rib 22. Either the fixed rib 32 or the adjustment rib 22 has a through hole 32a, 22a through which the adjustment screw 51 can be rotatably inserted, and the other has a female screw hole 54 for the adjustment screw 51. The adjustment screw 51 is inserted into the through hole 22a, 32a and the tip is screwed into the female screw hole 54, adjusting the distance between the fixed rib 32 and the adjustment rib 22 and adjusting the inclination angle of the rail bar 2.

Furthermore, as shown in the cross-sectional view of FIG. 9, the inclination angle adjustment mechanism 5 can adjust the inclination angle of the rail bar 2 by providing the adjustment rib 22 of the rail bar 2 above the fixed rib 32 provided on the lower edge of the fixed bar 3 and adjusting the gap 53 between the fixed rib 32 and the adjustment rib 22. This inclination angle adjustment mechanism 5 fixes the adjustment screw 51 in a vertical position to the fixed rib 32 in a structure that does not rotate, and an adjustment nut 52 is screwed into the adjustment screw 51. The adjustment rib 22 of the rail bar 2 is provided with a through hole 22a for the adjustment screw 51, and the tip of the adjustment screw 51 into which the adjustment nut 52 is screwed is inserted into the through hole 22a and penetrates the adjustment rib 22. The inclination angle adjustment mechanism 5 of this structure can adjust the interval between the fixed rib 32 and the adjustment rib 22 by rotating the adjustment nut 52, and adjust the inclination angle of the rail bar 2. This inclination angle adjustment mechanism 5 rotates the adjustment nut 52 so that it moves toward the tip of the adjustment screw 51, pushing up and raising the adjustment rib 22 to reduce the inclination angle of the rail bar 2, and conversely, rotates the adjustment nut 52 so that it moves toward the head of the adjustment screw 51, lowering the adjustment rib 22 to increase the inclination angle of the rail bar 2.

In addition, the inclination angle adjustment mechanism, which adjusts the gap between the fixed rib at the lower edge of the fixed bar and the adjustment rib at the lower end of the rail bar to adjust the inclination angle of the rail bar, can be configured to fix the adjustment screw in a vertical position to the adjustment rib in a structure that does not rotate, and an adjustment nut can be screwed into the adjustment screw, and a through hole for the adjustment screw can be provided in the fixed rib, and the tip of the adjustment screw into which the adjustment nut is screwed can be inserted into the through hole and passed through the fixed rib. The inclination angle adjustment mechanism of this structure can also adjust the inclination angle of the rail bar by rotating the adjustment nut to adjust the gap between the fixed rib and the adjustment rib. This inclination angle adjustment mechanism can rotate the adjustment nut so that it moves toward the tip of the adjustment screw, raising the adjustment rib and decreasing the inclination angle of the rail bar, and conversely rotate the adjustment nut so that it moves toward the head of the adjustment screw, lowering the adjustment rib and increasing the inclination angle of the rail bar.

The above-described electric fire door device 100 is installed and fixed to a building in the following steps.
1. With no door pocket wall 83 covering the surface of the door pocket 81 and the surface of the door pocket 81 open, the fixed bar 3 is fixed to the surface of the building frame 80 located inside the door pocket 81. In the fire door device 100 of Fig. 5, the fixed bar 3 is fixed by welding to the base plate 35 which is fixed to the building in advance. The lower edge of the fixed bar 3 is welded to the base plate 35, and the upper part is fixed to the base plate 35 with a set screw (not shown). The fixed bar 3 is fixed at a downward slope from the rear end to the front end.
Furthermore, the clamping arm 41 of the locking mechanism 4 that detachably connects the rail bar 2 to the fixed bar 3 is fixed. One end of the clamping arm 41 (the left end in Figs. 1 and 3) is screwed and fixed to the fixed bar 3. The clamping arm 41 is fixed in a position where it can be connected to the fixed bar 3 by clamping the rail bar 2.

2. After the fixing bar 3 is fixed to the building structure 80, a door pocket wall 83 is constructed on the surface of the door pocket 81 away from the building structure 80, and the door pocket 81 is constructed with a storage space for storing the fire door 1 between the building structure 80 and the door pocket wall 83. The door pocket 81 has an opening on the side to serve as an opening for opening and closing the fire door 1.

3. The rear end of the rail bar 2 is inserted into the door pocket 81, the tip of the rail bar 2 is guided into the gap 42 between the fixed bar 3 and the clamping arm 41, and the rail bar 2 is connected to the surface of the fixed bar 3 by the clamping arm 41. The tip of the rail bar 2 is placed on the fixing rib 32 provided on the lower edge of the fixed bar 3, and the rail bar 2 is inserted into the door pocket 81 along the surface of the fixed bar 3, and the rear end is guided between the clamping arm 41 and the fixed bar 3, so that it can be connected to the fixed bar 3.

4. With the rear end connected to the fixed bar 3, the tip of the rail bar 2 is moved up and down by the inclination angle adjustment mechanism 5 to adjust the inclination angle of the rail bar 2. With the adjustment rib 22 of the rail bar 2 placed on the fixed rib 32, the adjustment screw 51 of the inclination angle adjustment mechanism 5 in FIG. 5 is inserted from top to bottom from the fixed rib 32 to the adjustment rib 22, and the adjustment nut 52 is screwed into the threaded portion of the adjustment screw 51 protruding downward from the adjustment rib 22, and the adjustment screw 51 temporarily fastens the rail bar 2 to the fixed bar 3. In this state, the adjustment nut 52 is rotated to adjust the vertical positions of the fixed rib 32 and the adjustment rib 22, thereby adjusting the inclination angle of the rail bar 2. The adjustment rib 22 is pushed up by the adjustment nut 52, in other words, the adjustment rib 22 is lifted by the adjustment screw 51 and the adjustment nut 52 to adjust the inclination angle of the rail bar 2 to an optimal value, so that when the inclination angle is adjusted, the lower surface of the tip of the rail bar 2 is in a position away from the upper surface of the fixed rib 32. In this state, in order to provide the rail bar 2 with an optimal downward slope, the fixed bar 3 is fixed to the building structure 80 at a downward slope greater than the maximum inclination angle of the rail bar 2.

5. The rail bar 2, whose downward inclination angle has been adjusted by the inclination angle adjustment mechanism 5, is fixed to the fixed bar 3. The rail bar 2 is fixed to the fixed bar 3 by screwing the set screw 33 that passes through it into the fixed bar 3. The set screw 33 fixes the rail bar 2 to the fixed bar 3 in the area exposed to the outside of the door pocket 81. This is because, when removing the rail bar 2 from the fixed bar 3, the set screw 33 is removed and the rail bar 2 is pulled out from the door pocket 81 for maintenance. The rear end of the rail bar 2 is connected to the fixed bar 3 by the locking mechanism 4, and the area exposed to the outside of the door pocket 81 is connected to the fixed bar 3 by the set screw 33.

6. After the rail bar 2 is connected to the fixed bar 3, the running platform 11 to which the fire door 1 is connected in a suspended state is placed on the rail 21 of the rail bar 2, and the fire door 1 is connected to the rail bar 2.
The coil unit 61 of the linear motor 6 is fixed to the rail bar 2 in advance, and the permanent magnet 63 of the fixed bar 3 is fixed to the running platform 11 in advance, so that the coil unit 61 and the permanent magnet 63 of the mover 64 are disposed in opposing positions when the running platform 11 is connected to the rail bar 2. Therefore, the moving magnetic field of the coil unit 61 of the linear motor 6 can be controlled by the control circuit 7 to open or close the fire door 1.

7. A device that controls a linear motor 6 with a non-contact sensor 71 connects the non-contact sensor 71 to a control circuit 7 of the linear motor 6, and the control circuit 7 controls the linear motor 6 in response to a signal from the non-contact sensor 71 to open and close the fire door 1. A device that uses a face recognition sensor 71A as the non-contact sensor 71 provides the face recognition sensor 71A to a door frame (not shown) to which the fire door 1 is fixed, and recognizes the face of a person approaching the fire door 1 to open and close the fire door 1.

The present invention is suitable for use as an electrically operated fire door device that can be opened and closed using a linear motor, such as for the entrance doors of apartment buildings.

100...fire door device 1...fire door 2...rail bar 2A...first rail bar 2B...second rail bar 3...fixed bar 4...locking mechanism 5...tilt angle adjustment mechanism 6...linear motor 7...control circuit 11...running platform 12...wheels 14...suspension bracket 21...rail 22...adjustment rib 22a...through hole 23...connecting rib 24...slit 31...vertical plate 32...fixed rib 32a...through hole 33...set screw 34...tapping screw 35...base plate 35A...first base plate 35B...second base Plate 35C...third base plate 36...top plate 37...inspection hatch cover 38...locking fitting 38a...locking rib 41...clamping arm 41A...elastic arm plate 42...insertion gap 51...adjusting screw 52...adjusting nut 53...gap 54...female screw hole 55...nut member 61...coil unit 61a...coil 62...stator 63...permanent magnet 64...mover 71...non-contact sensor 71A...face recognition sensor 72...camera 73...arithmetic circuit 74...memory 80...building structure 81...door pocket 82...gap 83...door pocket wall

Claims (9)

Sliding fire doors and
A running platform having wheels to which the fire door is connected in a hanging structure;
a rail bar having a rail along which the wheels run;
It is fixed to the building,
A fixed bar that is fixed to the rail bar in a detachable structure;
The running platform and the rail bar are provided with
A linear motor that moves the running platform along the rail bar;
A control circuit that controls the linear motor to move the traveling platform along the rail bar;
An electric fire door device comprising:
a locking mechanism that detachably connects the rear end of the rail bar to the fixed bar;
an inclination angle adjustment mechanism for adjusting the inclination angle of the rail bar, the rail bar being disposed at a downward gradient from the rear end to the front end, and connecting the front end to the fixed bar;
The fixing bar is
The total length extending to both ends of the rail bar is:
A vertical plate having a predetermined vertical width and a fixing rib on the side edge thereof;
The locking mechanism includes:
fixed to the vertical plate of the fixed bar,
The rear end of the rail bar is sandwiched between the rail bar and the vertical plate.
The clamping arms are connected so as to be freely removable in the longitudinal direction.
The rail bar is
The rear end is placed on the fixing rib, and the rear end is connected to the fixing bar via the clamping arm,
An electrically operated fire door device, characterized in that the inclination angle adjustment mechanism is fixed to the fixed bar by adjusting the up and down position of the end portion on the door tip side. 2. The electrically operated fire door system according to claim 1,
The rail bar is
An adjustment rib is disposed at a position opposite to the fixed rib,
The tilt angle adjustment mechanism is
The gap between the fixed rib and the adjustment rib is adjusted,
An electrically operated fire door device characterized in that the inclination angle of the rail bar is adjustable. 3. The electrically operated fire door system according to claim 2,
The rail bar is
The fixing bar has an adjustment rib located below the fixing rib provided on the upper edge thereof,
The tilt angle adjustment mechanism is
The gap between the fixed rib and the adjustment rib is adjusted,
An electrically operated fire door device characterized in that the inclination angle of the rail bar is adjustable. 3. The electrically operated fire door system according to claim 2,
The rail bar is
The fixing bar has a lower edge and an adjustment rib located above the fixing rib.
The tilt angle adjustment mechanism is
The gap between the fixed rib and the adjustment rib is adjusted,
An electrically operated fire door device characterized in that the inclination angle of the rail bar is adjustable. 5. The electrically operated fire door system according to claim 2,
The tilt angle adjustment mechanism is
an adjustment screw fixed to the fixing rib in a vertical position;
an adjustment nut screwed onto the adjustment screw;
the adjustment rib has a through hole for the adjustment screw;
The tilt angle adjustment mechanism includes:
With the adjustment screw inserted into the through hole of the adjustment screw,
Rotate the adjustment nut,
An electrically operated fire door device characterized in that the inclination angle of the rail bar is adjusted by adjusting the distance between the fixed rib and the adjustable rib. The electric fire door system according to claim 2 or 3,
The tilt angle adjustment mechanism has an adjustment screw,
The fixing rib and the adjusting rib are
a through hole through which the adjustment screw is rotatably inserted in one of the two;
The other has a female screw hole for the adjustment screw,
The tilt angle adjustment mechanism includes:
The adjustment screw is inserted into the through hole and the tip is screwed into the female screw hole,
An electrically operated fire door device characterized in that the inclination angle of the rail bar is adjusted by adjusting the distance between the fixed rib and the adjustable rib. 7. The electrically operated fire door system according to claim 1,
The linear motor is
A coil unit that generates a moving magnetic field in the moving direction of the fire door;
a mover that is driven and moved by a moving magnetic field of the coil unit,
The mover is connected to the running platform, and the coil unit is fixed to the rail bar,
2. An electrically operated fire door device, wherein the movable member and the coil unit are disposed opposite each other above and below. 8. The electrically operated fire door system according to claim 1,
a non-contact sensor for controlling the linear motor;
13. An electrically operated fire door device, wherein the linear motor drives the fire door in response to a signal from the non-contact sensor. 9. The electric fire door system according to claim 8,
The non-contact sensor is
A camera that photographs a person approaching the fire door ;
and a calculation circuit for processing the image from the camera.

Images