Fire spread prevention device

Abstract

The present invention provides a fire spread prevention device that can simultaneously prevent the spread of fire from flashover and pool fires. [Solution] The fire spread prevention device 100 comprises a housing 1 having an opening on its top surface, a top plate 5 that opens and closes the opening, a pantograph-type lifting device 2 that is vertically movable inside the housing 1, a first non-combustible sheet 3 that is pulled out to an upright position on the outside of the housing 1 upward as the pantograph-type lifting device 2 moves upward, and a second non-combustible sheet 4 that is pulled out to the outside of the housing 1 to the side as the top plate 5 moves open. The pantograph-type lifting device 2 comprises a plurality of scissor arms 9 that are connected to open and close, a compression coil spring 11 that biases the plurality of scissor arms 9 in the opening direction, a locking part that holds the plurality of scissor arms 9 in a closed position against the biasing force of the compression coil spring 11, and an operating member 7 that locks / unlocks the locking part.

Description

Technical Field

[0001] The present invention relates to a fire spread prevention device for preventing the spread of fire.

Background Art

[0002] When a fire breaks out indoors with a relatively limited space such as an automobile carrier, a self-propelled multi-story parking lot, or a logistics warehouse, there is a risk that flammable materials will ignite all at once due to radiant heat or the like, and a phenomenon called flashover may occur, in which the fire spreads explosively. Also, when fuel such as gasoline leaks from the fuel tank of an automobile, heat from the fire is transmitted to the fuel leaked on the floor or ground, and the fuel is heated and evaporated until it reaches a flame, possibly causing a fire called pool combustion (or surface combustion). When such flashover or pool combustion occurs, fire-fighting activities can only be carried out to prevent the spread of fire, so it is effective to have means for preventing the spread of fire.

[0003] As a conventional technique for preventing the spread of fire, for example, Patent Document 1 discloses a fire spread prevention device including a box having an openable and closable lid, and a fire spread prevention wall made of a non-combustible material that is folded and stored in the box when not in use, and protrudes from the box and stands substantially vertically to form a partition between buildings when in use.

[0004] According to the fire spread prevention device described in this Patent Document 1, it can be stored compactly by contraction or folding during normal times without getting in the way, and can quickly form a fire spread prevention partition between buildings when a fire breaks out. Also, when installed under the eaves, it can prevent a fire from entering the interior of the room and prevent radiant heat from a neighboring burning building from reaching the surface of the building, thus preventing ignition as a result.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] However, the fire spread prevention device described in Patent Document 1 only has a fire spread prevention wall made of non-combustible material that protrudes upward from the box, making it difficult to prevent the spread of fire along the floor or ground. Therefore, from the standpoint of preventing the spread of fire in the case of flashover fires and swimming pool fires, there is room for improvement.

[0007] This invention has been made in view of these circumstances, and its purpose is to provide a fire spread prevention device that can simultaneously prevent the spread of flashover fires and pool fires. [Means for solving the problem]

[0008] To achieve the above objective, one aspect of the present invention is a fire spread prevention device comprising: a housing having an opening on its upper surface; a top plate rotatably supported at the upper end of the housing and opening and closing the opening; a pantograph-type lifting device arranged to move up and down inside the housing; a first non-combustible sheet that is pulled out from inside the housing to an upright position upward to the outside as the pantograph-type lifting device moves upward; and a second non-combustible sheet that is pulled out from inside the housing to the outside to the side as the top plate moves out, wherein the pantograph-type lifting device comprises: a plurality of scissor arms connected to be openable and closable; a spring member that biases the plurality of scissor arms in the opening direction; a locking member that holds the plurality of scissor arms in a closed position against the biasing force of the spring member; and an operating member that operates the locking member to apply the biasing force of the spring member to the plurality of scissor arms. [Effects of the Invention]

[0009] The fire spread prevention device of the present invention can simultaneously prevent the spread of fire from flashover fires and pool fires. Other issues, configurations, and effects will be clarified by the following description of embodiments. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing the appearance of a fire spread prevention device according to the first embodiment of the present invention. [Figure 2] This is a cross-sectional view showing the internal structure of a fire spread prevention device according to an embodiment. [Figure 3] This is an explanatory diagram showing the configuration of a pantograph-type lifting device. [Figure 4] This is an explanatory diagram showing the top panel viewed from the back side. [Figure 5] This is an explanatory diagram showing the opening operation of the top panel. [Figure 6] This is a cross-sectional view showing the internal structure of a fire spread prevention device according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0011] Embodiments of the present invention will be described below with reference to the drawings.

[0012] Figure 1 is a perspective view showing the external appearance of the fire spread prevention device according to the first embodiment, Figure 2 is a cross-sectional view showing the internal structure of the fire spread prevention device, Figure 3 is an explanatory diagram showing the configuration of the pantograph-type lifting device, Figure 4 is an explanatory diagram showing the top panel viewed from the back side, and Figure 5 is an explanatory diagram showing the opening operation of the top panel.

[0013] As shown in Figures 1 to 5, the fire spread prevention device 100 according to the first embodiment mainly comprises a rectangular parallelepiped housing 1 that forms the outer shell of the device, a pantograph-type lifting device 2 installed inside the housing 1, a pair of first non-combustible sheets 3 housed inside the housing 1, and a pair of second non-combustible sheets 4 housed inside the housing 1. In the following description, the X-axis, Y-axis, and Z-axis are defined as shown in Figures 1 to 6, respectively, and the X1-X2 direction, Y1-Y2 direction, and Z1-Z2 direction correspond to the longitudinal direction, short direction, and height direction of the housing 1, respectively.

[0014] The housing 1 has an opening on its top surface, which can be opened and closed by a pair of top plates 5. These top plates 5 are hinged together with the upper ends of a pair of side walls 1a extending in the X-axis direction of the housing 1 as pivot points P, and are elastically biased in the opening direction by a spring member (e.g., a torsion spring) not shown. The pair of top plates 5 are provided with locking parts 5a that can be locked into a closed position with their ends horizontally abutting against each other. The locking action of these locking parts 5a prevents foreign matter such as dust and rainwater from entering the housing 1 through the joint between the two top plates 5. When the locking action of the locking parts 5a is released, the pair of top plates 5 are opened by the biasing force of the spring member, opening the top surface of the housing 1.

[0015] Furthermore, multiple transport rollers 6 are provided on the bottom side of the housing 1, and these transport rollers 6 allow the fire spread prevention device 100 to be easily moved to the position of use. In addition, an operating member 7 is provided in an exposed state on one side wall 1b of the housing 1 that extends in the Y-axis direction. This operating member 7 functions as a switch to release the locking operation of the top plate 5 by the locking part 5a, or to release the locking operation of the locking part (described later) provided on the pantograph-type lifting device 2.

[0016] The pantograph-type lifting device 2 is positioned directly below the joint between the two upper panels 5. As shown in Figure 3, it has a support base 8 installed on the inner bottom surface of the housing 1 and a liftable scissor link 9 supported by the support base 8. The scissor link 9 consists of two movable scissor arms 9a connected in an X shape, a V-shaped lower scissor arm 9b connected downstream of the lower movable scissor arm 9a, and an inverted V-shaped upper scissor arm 9c connected upstream of the upper movable scissor arm 9a. These movable scissor arms 9a, the lower scissor arm 9b, and the upper scissor arm 9c are made of, for example, rectangular cylindrical steel pipes, and the connecting portion of the lower scissor arm 9b is rotatably pivotally supported on the support base 8 via a pin 10. Note that the number of movable scissor arms 9a provided on the scissor link 9 is not limited to two stages, but may be three or more.

[0017] A compression coil spring 11, which is a spring member that biases the scissor link 9 in the opening direction, is installed between the lower movable scissor arm 9a and the support base 8. When the scissor link 9 is folded and held in the closed position, the pantograph lifting device 2 is in a folded state and stored inside the housing 1. When the scissor link 9 is released by the biasing force of the compression coil spring 11, it rises from the housing 1 in the Z2 direction and protrudes. Note that the same compression coil springs 11 may be selectively attached to the upper movable scissor arm 9a, the lower scissor arm 9b, and the upper scissor arm 9c, and the biasing force that biases the scissor link 9 in the opening direction increases as the number of compression coil springs 11 increases.

[0018] A pair of leg pieces 12 are held in the movable shear arm 9a on the lower side so that they can move in and out, and an anti-back mechanism (not shown) for locking these leg pieces 12 at the maximum protruding position is provided. The pair of leg pieces 12 are housed and held in a submerged state inside the movable shear arm 9a in the folded state of the shear link 9 in which the movable shear arm 9a is in a substantially horizontal posture. Then, when the movable shear arm 9a assumes an upward inclined posture as the shear link 9 is opened, the pair of leg pieces 12 protrude from the movable shear arm 9a due to their own weight, and as shown in FIG. 3, the tips of the respective leg pieces 12 protruding from the movable shear arm 9a are locked to the inner bottom of the housing 1. As a result, the shear link 9 in the open posture is supported at three points by the tips of both leg pieces 12 and the pin 10 provided on the support base 8, so that the pantograph lifting device 2 can be stably held at the uppermost position.

[0019] At an arbitrary position of the shear link 9, for example, a pair of engaging portions 9d are provided on the movable shear arm 9a on the lower side, and an engaging receiving portion 8a that can be engaged with and disengaged from each engaging portion 9d is provided on the support base 8.These engaging portions 9d and the engaging receiving portion 8a constitute a locking portion for locking / releasing the shear link 9 in the closed posture. As a result, when the engaging portion 9d is locked to the engaging receiving portion 8a in the folded state of the shear link 9, the shear link 9 is held in the closed posture against the biasing force of the compression coil spring 11. Then, when the locking state of the engaging receiving portion 8a and the engaging portion 9d is released by the operation member 7, the shear link 9 assumes an open posture under the biasing force of the compression coil spring 11, and accordingly, the pantograph lifting device 2 moves upward in the Z2 direction.

[0020] A pair of stopper pieces 13 are rotatably supported on the upper shear arm 9c. As the upper shear arm 9c and the upper movable shear arm 9a on the upper stage expand to the maximum angle along with the ascending operation of the pantograph lifting device 2, the stopper pieces 13 rotate in the direction of hanging down from the upper shear arm 9c and are locked to the upper movable shear arm 9a on the upper stage. Although not shown in the figure, similar stopper pieces 13 are also rotatably supported on the upper movable shear arm 9a on the upper stage and the lower movable shear arm 9a on the lower stage. Thereby, when the upper movable shear arm 9a on the upper stage and the lower movable shear arm 9a on the lower stage expand to the maximum angle, the stopper pieces 13 rotate in the direction of hanging down from the upper movable shear arm 9a on the upper stage and are locked to the lower movable shear arm 9a on the lower stage. Further, when the lower movable shear arm 9a and the lower shear arm 9b expand to the maximum angle, the stopper pieces 13 rotate in the direction of hanging down from the lower movable shear arm 9a and are locked to the lower shear arm 9b.

[0021] In this way, among the plurality of stages of shear arms (movable shear arm 9a, lower shear arm 9b, upper shear arm 9c) constituting the shear link 9, the stopper pieces 13 are rotatably supported on the shear arm located on the upstream side in the connecting direction, and the stopper pieces 13 are locked to the shear arm on the downstream side along with the opening operation of the shear link 9. Thereby, when the pantograph lifting device 2 ascends to the uppermost position, the opening angles of two adjacent shear arms in the vertical direction are locked by the stopper pieces 13, so that the open posture of the shear link 9 is stably maintained.

[0022] The first non-combustible sheet 3 and the second non-combustible sheet 4 are rectangular flexible sheet members made of a non-combustible material obtained by laminating a glass cloth with a resin material such as PVC, and their width dimensions are set slightly shorter than the length along the X-axis direction of the housing 1.

[0023] The first non-combustible sheets 3 are positioned at two locations opposite each other in the X-axis direction, flanking the pantograph-type lifting device 2. The upper edges of these first non-combustible sheets 3 are connected to a pair of first rod-shaped bodies 14 extending in the X-axis direction of the housing 1, and both first rod-shaped bodies 14 are held by the upper scissor arms 9c of the scissor link 9. The lower edges of the pair of first non-combustible sheets 3 are wound around a support shaft 15 provided at the inner bottom of the housing 1 near the pantograph-type lifting device 2. As a result, when the pantograph-type lifting device 2 moves upward (in the Z2 direction), the pair of first non-combustible sheets 3 are unfurled from the support shaft 15 and pulled out from the inside of the housing 1 to the outside upward in an upright position.

[0024] The second non-combustible sheets 4 are positioned at two lower positions opposite to both upper panels 5. The upper edges of these second non-combustible sheets 4 are connected to a pair of second rod-shaped bodies 16 extending in the X-axis direction of the housing 1, and hooks 17 are provided on the back surfaces of the pair of upper panels 5 to hold both ends of the second rod-shaped bodies 16. The hooks 17 are fixed to the rear end side of the upper panel 5 near the pivot point P and have notches 17a that open toward the front end of the upper panel 5. As a result, when the pair of upper panels 5 are in a closed position with their front ends horizontally abutting against each other, the second rod-shaped bodies 16 connected to the upper edges of the second non-combustible sheets 4 are held by the back surfaces of the corresponding upper panels 5. The lower edges of the pair of second non-combustible sheets 4 are wound around support shafts 18 provided near the side walls 1a in the inner bottom of the housing 1. As a result, the pair of second non-combustible sheets 4 are housed inside the housing 1 along the inside of the side wall 1a, connecting the inner bottom of the housing 1 and the back surface of the top panel 5.

[0025] A cylindrical body 19 extending in the X-axis direction of the housing 1 is disposed between the pivot point P on the back surface of the top plate 5 and the hook 17. As shown in Figure 4, the cylindrical body 19 is made of a heavy material such as resin or metal and is held by a support shaft 20 provided near the pivot point P of the top plate 5. The cylindrical body 19 has an inner diameter that is sufficiently large compared to the diameter of the support shaft 20 and is movable in a direction perpendicular to the axis of the support shaft 20 (radial direction).

[0026] Here, when the pair of top plates 5 are in a closed position with their ends horizontally abutting against each other, the second rod-shaped body 16 is held by the hook 17, and the cylindrical body 19 hangs down from the support shaft 20 and faces the side of the second rod-shaped body 16 (see Figure 2). Then, as the top plates 5 open, the notch 17a of the hook 17 faces downward, the cylindrical body 19 moves in a direction toward the hook 17, pressing the second rod-shaped body 16 in a direction toward falling out of the notch 17a.

[0027] Next, a description will be given of how to use the fire spread prevention device 100 according to the first embodiment.

[0028] When the fire spread prevention device 100 is not in use, the inside of the housing 1 is covered by a pair of top plates 5, and these top plates 5 are locked in a closed position with their ends overlapping by a locking portion 5a. In addition, the pantograph lifting device 2 is held (locked) in a closed position with the scissor link 9 folded inside the housing 1 by the locking operation of a locking portion consisting of an engaging receiving portion 8a and an engaging portion 9d.

[0029] Furthermore, the pair of first non-combustible sheets 3 are connected at their upper edges to a first rod-shaped body 14 held by the upper scissor arm 9c of the scissor link 9, and are stored inside the housing 1 with their lower edges wound around a support shaft 15. In addition, the pair of second non-combustible sheets 4 are stored inside the housing 1 with their upper edges connected to a second rod-shaped body 16, which is held by a hook 17 provided on the back surface of the top plate 5, and their lower edges wound around a support shaft 18.

[0030] Furthermore, in the event of a fire occurring in a relatively confined space such as a car carrier, a self-propelled multi-story parking garage, or a logistics warehouse, the fire spread prevention device 100 is first installed on the floor of the fire site. Even if the fire spread prevention device 100 is stored in a location away from the fire site, the transport rollers 6 attached to the bottom of the housing 1 allow the fire spread prevention device 100 to be easily moved to the desired location.

[0031] After installing the fire prevention device 100 at the fire site in this manner, the operating member 7 exposed on the side wall 1b of the housing 1 is operated manually or by foot to release the locking action of the top plate 5 by the locking part 5a and the locking action of the scissor link 9 by the locking part (engaging receiving part 8a and engaging part 9d). As a result, the pair of top plates 5 open up to open the top surface of the housing 1, and the scissor link 9 moves vigorously from the closed position to the open position under the biasing force of the compression coil spring 11, causing the pantograph-type lifting device 2 to start its upward movement.

[0032] As the pantograph-type lifting device 2 moves upward, the movable scissor arm 9a tilts upward, causing the pair of leg pieces 12 to protrude from the movable scissor arm 9a due to their own weight. As shown in Figure 3, the tips of each leg piece 12, which protrude to their maximum position from the movable scissor arm 9a, are locked to the inner bottom of the housing 1. As a result, the scissor link 9, now in its open position, is supported at three points: the tips of both leg pieces 12 and the pins 10 provided on the support base 8. This ensures that the pantograph-type lifting device 2 is stably held in its uppermost position.

[0033] Furthermore, as the pantograph-type lifting device 2 rises, the upper scissor arm 9c and the upper movable scissor arm 9a extend to their maximum angles, and the stopper piece 13 supported by the upper scissor arm 9c locks into the upper movable scissor arm 9a. As a result, when the pantograph-type lifting device 2 rises to its highest position, the opening angles of the two vertically adjacent scissor arms are locked by the stopper piece 13, and the open position of the scissor link 9 is stably maintained.

[0034] As the pantograph-type lifting device 2 rises to its highest position, the pair of first rod-shaped bodies 14 held by the upper scissor arm 9c of the scissor link 9 also move to the highest position. Consequently, the first non-combustible sheets 3 connected to each first rod-shaped body 14 are extended from the support shaft 15 and pulled out from the inside of the housing 1 to the outside upward in an upright position. As a result, the pair of first non-combustible sheets 3 pulled out from the housing 1 extend between the floor and ceiling of the room, preventing the occurrence of a flashover fire that would cause a fire to spread explosively.

[0035] Furthermore, when the pair of top plates 5 begin to open, the position of the hook 17 changes in accordance with the rotation angle of the top plates 5. For example, as shown in Figure 5(a), when the top plates 5 rotate to approximately 150 degrees during the opening process, the hook 17 changes to a position where the notch 17a is angled upward, and during this time, the second rod-shaped body 16 moves integrally with the top plates 5 while being held by the hook 17. When the rotation angle of the top plates 5 exceeds 180 degrees, the hook 17 takes a position where the notch 17a is angled downward, and when the top plates 5 rotate to approximately 270 degrees, the hook 17 takes a position where the notch 17a is pointing straight down. As a result, as shown in Figure 5(b), the second rod-shaped body 16 detaches from the notch 17a of the hook 17 and falls to the floor, and the second non-combustible sheet 4 connected to the second rod-shaped body 16 is unfurled from the support shaft 18 inside the housing 1 and pulled out to a position that covers the upper end to the lower end of the side wall 1a.

[0036] At that time, when the top plate 5 rotates to approximately 270 degrees and assumes a vertical position, the cylindrical body 19, which is held on the back surface of the top plate 5 via the support shaft 20, moves toward the hook 17 due to its own weight. As a result, the second rod-shaped body 16 is pressed downward by the cylindrical body 19, so that when the top plate 5 rotates to a position close to the side wall 1a, the second rod-shaped body 16 can be reliably detached from the notch 17a of the hook 17. Moreover, since the cylindrical body 19 is positioned near the pivot point P on the back surface of the top plate 5, the second non-combustible sheet 4, which is unfurled from the support shaft 18, can be smoothly pulled out to the outside of the housing 1 along the outer surface of the cylindrical body 19. The above describes the opening operation of one top plate 5, but the same applies to the other top plate 5, and as the pair of top plates 5 open, two sets of second non-combustible sheets 4 are pulled out to the opposite outer sides of the housing 1.

[0037] In this way, when the pair of top panels 5 are opened, both side walls 1a of the housing 1 installed on the floor of the fire site are covered by the second non-combustible sheet 4. Therefore, these two second non-combustible sheets 4 can prevent the pool fire from spreading along the floor. Thus, both flashover fires and pool fires can be prevented simultaneously by the first non-combustible sheet 3 and the second non-combustible sheet 4.

[0038] As described above, the fire spread prevention device 100 according to the first embodiment can provide the following effects.

[0039] The device comprises a housing 1 having an opening on its top surface, a top plate 5 rotatably supported at the upper end of the housing 1 to open and close the opening, a pantograph-type lifting device 2 arranged to move up and down inside the housing 1, a first non-combustible sheet 3 that is pulled out from inside the housing 1 to an upright position upward to the outside as the pantograph-type lifting device 2 moves upward, and a second non-combustible sheet 4 that is pulled out from inside the housing 1 to the outside to the side as the top plate 5 moves out. The pantograph-type lifting device 2 comprises a plurality of scissor arms (movable scissor arm 9a, lower scissor arm 9b, upper scissor arm 9c) that are connected to be openable and closable, a compression coil spring (spring member) 11 that biases the plurality of scissor arms in the opening direction, and the compression coil spring 11 The device has a locking mechanism (engaging part 9d and engaging receiving part 8a) that holds the multiple scissor arms in a closed position against a biasing force, and an operating member 7 that operates the locking mechanism to apply the biasing force of the compression coil spring 11 to the multiple scissor arms. As a result, the first non-combustible sheet 3 housed inside the housing 1 can be pulled out to an upright position to the outside of the housing 1 upwards as the pantograph-type lifting device 2 rises, and the second non-combustible sheet 4 housed inside the housing 1 can be pulled out to the outside of the housing 1 to the side as the top plate 5 opens. These first non-combustible sheet 3 and second non-combustible sheet 4 can simultaneously prevent the spread of fire in the event of a flashover fire and a pool fire.

[0040] Furthermore, of the multiple scissor arms, a pair of lower movable scissor arms 9a each have leg pieces 12 that can extend and retract. When the pantograph-type lifting device 2 is raised to its highest position, these leg pieces 12 protrude from the lower movable scissor arms 9a and are locked to the inner bottom of the housing 1. As a result, the open scissor link 9 is supported at three points: the tips of both leg pieces 12 and the pins 10 provided on the support base 8, allowing the pantograph-type lifting device 2 to be stably held at its highest position.

[0041] Furthermore, among the multiple scissor arms adjacent to each other in the vertical direction, for example, the stopper piece 13 is rotatably supported on the upper scissor arm 9c located on the upstream side. As the pantograph lifting device 2 moves upward, the stopper piece 13 rotates and locks into the movable scissor arm 9a on the upper side. This locks the opening angle between the upper scissor arm 9c and the movable scissor arm 9a on the upper side, thus stably maintaining the open position of the scissor link 9 when the pantograph lifting device 2 rises to its highest position.

[0042] Furthermore, a first rod-shaped body 14 extending in the longitudinal direction of the housing 1 is provided on the upper scissor arm 9c located at the top of the scissor link 9. One end of the first non-combustible sheet 3 is connected to this first rod-shaped body 14, and the other end of the first non-combustible sheet 3 is held in a wound state at the bottom of the housing 1. As a result, the first non-combustible sheet 3 can be easily pulled out to an upright position as the pantograph-type lifting device 2 moves upward.

[0043] In this case, since the first non-combustible sheet 3 is arranged at two opposing positions on either side of the pantograph-type lifting device 2, the two sets of first non-combustible sheets 3 can be pulled up to the upright position in a balanced manner, and the effect of preventing the spread of fire in the event of a flashover fire can be enhanced. However, one of the two sets of first non-combustible sheets 3 may be omitted, and only one set of first non-combustible sheets 3 may be pulled up to the upright position.

[0044] Furthermore, a second rod-shaped body 16 extending in the longitudinal direction of the housing is connected to one end of the second non-combustible sheet 4, and a hook 17 capable of holding the second rod-shaped body 16 is provided on the back surface of the top plate 5. Since this hook 17 has a notch 17a that allows the second rod-shaped body 16 to fall naturally, the second non-combustible sheet 4, which is held in a wound state at the bottom of the housing 1, can be easily pulled out to the outside of the housing 1 when the top plate 5 is opened.

[0045] Furthermore, a cylindrical body 19 is movably held between the pivot point P on the back surface of the top plate 5 and the hook 17. As the top plate 5 opens, this cylindrical body 19 moves to press the second rod-shaped body 16 in a direction that causes it to detach from the notch 17a of the hook 17. Therefore, when the top plate 5 rotates to the outside side of the housing 1, the second rod-shaped body 16 can be reliably detached from the notch 17a of the hook 17. Moreover, because the cylindrical body 19 is positioned near the pivot point P on the back surface of the top plate 5, the second non-combustible sheet 4, which is unfurled from the bottom of the housing 1, can be smoothly pulled out to the outside side of the housing 1 along the outer surface of the cylindrical body 19.

[0046] Furthermore, since the housing 1 is provided with multiple transport rollers 6 that protrude from the bottom surface, even if the fire spread prevention device 100 is stored in a location far from the fire site, it can be easily moved to the usage location using the transport rollers 6.

[0047] Figure 6 is a cross-sectional view showing the internal structure of the fire spread prevention device according to the second embodiment, and the parts corresponding to those in Figure 2 are denoted by the same reference numerals.

[0048] As shown in Figure 6, the fire spread prevention device 200 according to the second embodiment differs from the fire spread prevention device 100 according to the first embodiment in that a portion of the second noncombustible sheet 4 is fixed to the back surface of the top plate 5; otherwise, they are basically the same. That is, in the fire spread prevention device 200 according to the second embodiment, the second noncombustible sheet 4 consists of a free-end sheet 4a that hangs down from a fixed portion Q set on the back surface of the top plate 5, and a base-end sheet 4b that extends from a support shaft 18 provided at the inner bottom of the housing 1 to the fixed portion Q of the top plate 5, with the second rod-shaped body 16 connected to the tip of the free-end sheet 4a.

[0049] In the fire spread prevention device 200 according to the second embodiment configured as described above, when the top plate 5 begins its opening operation, the position of the fixing part Q changes according to the rotation angle of the top plate 5. When the top plate 5 rotates to the open position facing the side wall 1a of the housing 1, the base end sheet 4b of the second non-combustible sheet 4 is pulled out from the support shaft 18 through the outer surface of the cylindrical body 19 to the fixing part Q, and the free end sheet 4a of the second non-combustible sheet 4 hangs down from the fixing part Q toward the floor. As a result, the entire area from the upper end to the lower end of the side wall 1a of the housing 1 is covered by a part of the base end sheet 4b and the free end sheet 4a of the second non-combustible sheet 4. Note that the pulling operation of the first non-combustible sheet 3 is the same as in the fire spread prevention device 100 according to the first embodiment, so a redundant explanation is omitted here.

[0050] In the fire spread prevention device 200 according to the second embodiment, the first non-combustible sheet 3 stored inside the housing 1 can be pulled out to an upright position to the outside of the housing 1 upward as the pantograph-type lifting device 2 rises, and the second non-combustible sheet 4 stored inside the housing 1 can be pulled out to the outside of the housing 1 to the side as the top panel 5 opens. These first non-combustible sheet 3 and second non-combustible sheet 4 can simultaneously prevent the spread of fire from flashover fires and pool fires.

[0051] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. All technical matters included in the technical concept described in the claims are subject to the present invention. The embodiments described above are preferred examples, but those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed herein, and these are included in the technical scope described in the appended claims.

[0052] For example, in the above embodiment, the opening of the housing 1 is opened and closed by a pair of top plates 5, but it is also possible to open and close the opening of the housing 1 using only one top plate 5, and accordingly, the first non-combustible sheet 3 and the second non-combustible sheet 4 may also be a single set.

[0053] Furthermore, in the above embodiment, the locking action of the top plate 5 by the locking portion 5a is released by the operating member 7, but the locking action of the top plate 5 may also be released by operating the locking portion 5a in conjunction with the upward movement of the pantograph-type lifting device 2.

[0054] Furthermore, the configuration of the pantograph-type lifting device 2 is not limited to the above embodiment. It may also be configured such that one arm of an X-shaped scissor arm is pivotally supported on the support base 8, while the other arm is movably supported on the support base 8, and multiple stages of movable scissor arms are connected to this scissor arm. [Explanation of Symbols]

[0055] 1 cabinet 1a,1b side wall 2. Pantograph-type lifting device 3. First non-combustible sheet 4. Second non-combustible sheet 4a Free end side sheet 4b Proximal end sheet 5 Top plate 5a Locking part 6 Conveyor rollers 7 Operating Member 8 Supporting base 8a Engaging receiving part (locking part) 9 Scissor Link 9a Movable scissor arm 9b Lower scissor arm 9c Upper scissor arm 9d Engaging part (locking part) 10 pins 11. Compression coil spring (spring component) 12 leg pieces 13 Stopper piece 14 1st rod-shaped body 15 Spindle 16 Second rod-shaped body 17 hooks 17a Notch 18 Spindle 19. Cylindrical body 20 spindle 100,200 Fire spread prevention device P rotation fulcrum Q Fixed part

Claims

1. A housing having an opening on the top surface, A top plate is rotatably supported at the upper end of the housing and opens and closes the opening, A pantograph-type lifting device is arranged inside the aforementioned housing so as to be able to move up and down, The first non-combustible sheet is pulled out from inside the housing to an upright position upwards and outwards as the pantograph-type lifting device moves upward, A second non-combustible sheet is pulled out from the inside of the housing to the outside as the top panel is opened, Equipped with, The aforementioned pantograph-type lifting device is Multiple scissor arms connected in a way that allows them to be opened and closed, A spring member that biases the aforementioned multiple scissor arms in the opening direction, A locking mechanism that holds the multiple scissor arms in a closed position against the biasing force of the spring member, An operating member for operating the locking portion to apply the biasing force of the spring member to the multiple scissor arms, A fire spread prevention device characterized by having the following features.

2. In the fire spread prevention device described in claim 1, The aforementioned multi-stage scissor arm has a leg piece that is held in a retractable position, When the pantograph-type lifting device is raised to its highest position, the leg piece protrudes from the scissor arm and is locked to the bottom of the housing. A fire spread prevention device characterized by the following features.

3. In the fire spread prevention device described in claim 1, Of the two adjacent scissor arms, the stopper piece is rotatably supported on the scissor arm located on the upstream side. As the pantograph-type lifting device moves upward, the stopper piece rotates and engages with the scissor arm located downstream, thereby locking the opening angle between two adjacent scissor arms. A fire spread prevention device characterized by the following features.

4. In the fire spread prevention device described in claim 1, A first rod-shaped body extending in the longitudinal direction of the housing is provided on the uppermost scissor arm of the scissor arm, One end of the first non-combustible sheet is connected to the first rod-shaped body, and the other end of the first non-combustible sheet is held in a wound state at the bottom of the housing. A fire spread prevention device characterized by the following features.

5. In the fire spread prevention device according to claim 4, The first non-combustible sheet is arranged at two positions opposite each other, with the pantograph-type lifting device in between. A fire spread prevention device characterized by the following features.

6. In the fire spread prevention device described in claim 1, A second rod-shaped body extending in the longitudinal direction of the housing is connected to one end of the second non-combustible sheet. The other end of the second non-combustible sheet is held in a wound state at the bottom of the housing. A fire spread prevention device characterized by the following features.

7. In the fire spread prevention device according to claim 6, A hook capable of holding the second rod-shaped body is provided on the back surface of the upper plate. The hook has a notch that allows the second rod-shaped body to fall naturally during the opening operation of the top plate. A fire spread prevention device characterized by the following features.

8. In the fire spread prevention device according to claim 7, A cylindrical body is movably held between the hook and the pivot point of the upper plate. As the upper plate opens, the cylindrical body moves in a direction approaching the hook, thereby pressing the second rod-shaped body in a direction that causes it to fall out of the notch. A fire spread prevention device characterized by the following features.

9. In the fire spread prevention device described in claim 1, The second non-combustible sheet has a base end sheet that extends from the bottom of the housing to a fixing portion set on the back surface of the top plate, and a free end sheet that hangs down from the fixing portion of the top plate. A fire spread prevention device characterized by the following features.

10. In the fire spread prevention device described in claim 1, The aforementioned top plates are provided at a pair of opposing upper ends of the housing, Each of the pair of upper plates is elastically biased in the opening direction and has a locking portion that can be locked in the closed position. When the locking mechanism of the aforementioned locking part is released, the pair of upper plates automatically rotate from the closed position to the open position. A fire spread prevention device characterized by the following features.

11. In the fire spread prevention device described in claim 1, The housing is equipped with a plurality of transport rollers protruding from the bottom surface. A fire spread prevention device characterized by the following features.

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