Fire spread prevention device

Abstract

To provide a fire spread prevention device convenient and suitable for miniaturization.SOLUTION: A fire spread prevention device 100 includes a housing 1 having an opening on an upper surface, a rotating body 2 rotatably supported inside the housing 1, a first support rod 3 fixed to the rotating body 2 and protruding outward from a peripheral surface, a second support rod 4 provided rotationally around a rotation axis of the rotating body 2, an incombustible sheet 5 connected to the first support rod 3 and the second support rod 4, a pressing body 6 movable from a standby position to an operating position, and a drive device (drive means) 7 for driving the pressing body 6. The first support rod 3 is rotationally turned to a substantially vertical standing attitude by the pressing body 6 having moved to the operating position, while the second support rod 4 is rotationally turned to an angle that exceeds at least a vertical line by the pressing body 6 having moved to the operating position.SELECTED DRAWING: Figure 7

Description

[Technical field]

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

[0002] If a fire breaks out in a densely populated residential area or warehouse where buildings are closely packed, there is a risk that the fire will spread to other areas. In particular, in the case of fires that occur following a major earthquake, it is predicted that it will be difficult for fire engines to arrive, so it is effective to have measures in place to prevent the fire from spreading.

[0003] As an example of this type of prior art, Patent Document 1 discloses a fire spread prevention device that includes a box installed on the ground or underground between buildings along the width of the buildings, and a fire spread prevention wall made of a non-combustible material that is folded and stored inside the box when not in use, and protrudes from the box and stands approximately vertically when in use, forming a partition between buildings.

[0004] The fire prevention device described in Patent Document 1 is normally stored compactly by contracting or folding so as not to get in the way, and in the event of a fire it can quickly form a partition between buildings to prevent the spread of fire.When installed under the eaves, it is said to be able to prevent fire from entering a room and to prevent radiant heat from a burning nearby building from reaching the surface of the building, thereby preventing ignition. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3018374 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the fire spread prevention device described in Patent Document 1, the fire spread prevention wall stored in a box is protruded upward using compressed air so that the fire spread prevention wall is erected in an approximately vertical position between adjacent buildings. This means that it is necessary to store a fire spread prevention wall of a length equivalent to the flame blocking range in the box, which poses the problem of the fire spread prevention device becoming larger.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a fire spread prevention device that is suitable for miniaturization and highly convenient. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, one aspect of the present invention is a fire spread prevention device comprising a housing having an opening on an upper surface, a rotating body rotatably supported inside the housing, a first support rod fixed to the rotating body and protruding outward from the circumferential surface, a second support rod rotatably arranged around the axis of rotation of the rotating body, a non-flammable sheet connected to the first support rod and the second support rod, a pressing body movable from a standby position to an operating position, and a driving means for driving the pressing body, wherein the first support rod is rotated to an approximately vertical upright position by the pressing body moved to the operating position, and the second support rod is rotated to an angle at least exceeding a vertical line by the pressing body moved to the operating position. Effect of the Invention

[0009] According to the present invention, it is possible to provide a fire spread prevention device that is suitable for miniaturization and highly convenient. Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing an appearance of a fire spread prevention device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing the internal structure of the fire spread prevention device according to the embodiment. [Diagram 3]FIG. 2 is a plan view showing the internal structure of the fire spread prevention device according to the embodiment. [Figure 4] 1 is a perspective view of a rotating body provided in a fire spread prevention device according to an embodiment. FIG. [Diagram 5] 4 is a cross-sectional view of a rotating body provided in the fire spread prevention device according to the embodiment. FIG. [Figure 6] 5 is an explanatory diagram of the operation of a drive device provided in the fire spread prevention device according to the embodiment; FIG. [Figure 7] FIG. 2 is an explanatory diagram showing a state in which the fire spread prevention device according to the embodiment is used. [Figure 8] FIG. 13 is a perspective view of a rotating body according to a modified example. [Figure 9] FIG. 11 is a cross-sectional view of a rotating body according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] FIG. 1 is an oblique view showing the appearance of the fire spread prevention device of the embodiment, FIG. 2 is a cross-sectional view showing the internal structure of the fire spread prevention device, FIG. 3 is a plan view showing the internal structure of the fire spread prevention device, FIG. 4 is an oblique view of a rotating body provided in the fire spread prevention device, FIG. 5 is a cross-sectional view of the rotating body provided in the fire spread prevention device of the embodiment, FIG. 6 is an explanatory diagram of the operation of a drive unit provided in the fire spread prevention device of the embodiment, and FIG. 7 is an explanatory diagram showing the use state of the fire spread prevention device.

[0013] As shown in Figs. 1 to 5, the fire spread prevention device 100 according to the embodiment includes a rectangular parallelepiped housing 1 forming the outer shell of the device, a rotor 2 rotatably supported inside the housing 1, a first support rod 3 fixed to the rotor 2 and protruding outward from the circumferential surface, a second support rod 4 rotatably provided around the axis of the rotor 2, a non-combustible sheet 5 connected to the first support rod 3 and the second support rod 4, a pressing body 6 movable from a standby position to an operating position, and a driving device (driving means) 7 for driving the pressing body 6. In the following description, the X-axis, Y-axis, and Z-axis are defined as shown in Figs. 1 to 3, and the X-axis, Y-axis, and Z-axis directions correspond to the longitudinal direction, transverse direction, and height direction of the housing 1, respectively.

[0014] The housing 1 has an opening on the top surface, and this opening can be opened and closed by a pair of top plates 8. These top plates 8 are hinged to the upper ends of both side walls 1a along the width direction (Y-axis direction) of the housing 1, respectively, and are opened and closed by an operating unit (described later) provided on the pressing body 6. Note that, although shown diagrammatically in FIG. 1, the pair of top plates 8 are arranged so that their tips overlap with each other to cover the opening. This prevents rainwater and dust from entering the housing 1 through the joint between the two top plates 8, even when the housing 1 is installed outdoors.

[0015] The housing 1 also has an opening on the front side, which can be opened and closed by a front plate 9. The front plate 9 is hinged to the bottom side of the housing 1, and is opened by an operating protrusion 2b formed on the rotating body 2. Furthermore, a plurality of transport rollers 10 are provided on the bottom side of the housing 1, and by using these transport rollers 10, the fire spread prevention device 100 can be easily moved to the usage position.

[0016] 4 and 5, the rotating body 2 is rotatably disposed on the front side of the housing 1 in the longitudinal direction (X-axis direction) and has a cylindrical appearance. Two first support rods 3 and two second support rods 4 are disposed on the rotating body 2, and the rotation axis 2a of the rotating body 2 extends along the Y-axis direction. Although not shown, a stopper is interposed between the end face of the rotating body 2 and the inner surface of the housing 1, and the rotation range of the rotating body 2 is restricted by this stopper.

[0017] The two first support rods 3 are erected at both ends of the rotor 2. These first support rods 3 are fixed to the rotor 2 and protrude in a direction perpendicular to the rotation axis 2a. Slit-shaped cutouts 2c are formed at both ends of the rotor 2, and the fixed end of the first support rod 3 and one end of the cutout 2c are set at approximately the same position in the circumferential direction. These cutouts 2c function as paths through which the second support rod 4 rotates, and extend from the side of the first support rod 3 along the circumferential direction over a range of 180 degrees or more (e.g., 250 degrees).

[0018] The two second support rods 4 are disposed on the outside of the first support rods 3. These second support rods 4 have rotating parts 4a that rotate around the axis of the rotation shaft 2a, and protrude from the rotating parts 4a to the outside of the rotor 2 through the cutout parts 2b.

[0019] The non-combustible sheet 5 is a flexible sheet member made of a non-combustible material, for example, glass cloth laminated with a resin material such as PVC. The non-combustible sheet 5 is formed in a substantially semicircular shape (see FIG. 7), and the center of the non-combustible sheet 5 is fixed to the first support rod 3. One end of the bottom side of the non-combustible sheet 5 is fixed to the second support rod 4, and the other end of the bottom side of the non-combustible sheet 5 is fixed inside the housing 1. When the fire spread prevention device 100 is not in use, the first support rod 3 and the second support rod 4 are held in the housing 1 in a posture of being laid down substantially parallel to each other along the X-axis direction, and the non-combustible sheet 5 connected to the first support rod 3 and the second support rod 4 is stored inside the housing 1 in a compactly folded state.

[0020] Furthermore, a slender partition plate 11 extending along the X-axis direction is installed in the upper interior of the housing 1, and pairs each consisting of a first support rod 3 and a second support rod 4 are installed at two locations on either side of the partition plate 11 in the Y-axis direction. Therefore, two non-flammable sheets 5 connected to the first support rod 3 and second support rod 4 of each pair are stored on either side of the partition plate 11 inside the housing 1. In addition, in Fig. 3, the partition plate 11 is indicated by a two-dot chain line.

[0021] The pressing body 6 is a member that raises the first support rod 3 and the second support rod 4, and can be moved from a standby position to an operating position within the housing 1 by a driving device 7. The driving device 7 includes a guide shaft 12 that guides the movement of the pressing body 6, a compression coil spring 13 that applies a driving force to the pressing body 6, a locking member 14 that holds the pressing body 6 at the standby position against the driving force of the compression coil spring 13, and an operating member 15 that operates the locking member 14 to apply the driving force of the compression coil spring 13 to the pressing body 6, and the guide shaft 12 is installed along the X-axis direction at the bottom inside the housing 1.

[0022] The pressing body 6 is movable along the axial direction of the guide shaft 12 and is rotatable around an axis parallel to the rotation axis 2a of the rotating body 2. Slanted guides 16 are provided on the inner surfaces of the housings 1 facing each other across the guide shaft 12, and both side portions of the pressing body 6 along the Y-axis direction abut against these slanted guides 16. As a result, the pressing body 6 moves from the standby position to the operating position while rotating the tip side upward along the slanted guides 16.

[0023] As shown in Fig. 3, the pressing body 6 has a first driving part 6a for rotating the first support rod 3 and a second driving part 6b for rotating the second support rod 4, and the first driving part 6a and the second driving part 6b have V-shaped or semicircular engagement grooves. The second driving part 6b protrudes forward from the first driving part 6a, and when the pressing body 6 moves from the standby position to the operating position, the second support rod 4 engaged with the second driving part 6b rotates before the first support rod 3 engaged with the first driving part 6a. In addition, a pair of standing pieces 17, which are operating parts, are provided on the upper surface of the pressing body 6, and when the pressing body 6 is held in the standby position, these standing pieces 17 face the back surface of the upper plate 8 in a non-contact state. Then, as the pressing body 6 moves from the standby position to the operating position, the upright piece 17 comes into contact with the rear surface of the upper plate 8 as the pressing body 6 rises, and the upper plate 8 is pushed up from the closed position to the open position.

[0024] The compression coil spring 13 is wound around the guide shaft 12 and abuts against the pressing body 6, and stores elastic energy when it receives a compression load from the pressing body 6 in the standby position. The locking member 14 locks / unlocks the pressing body 6 in the standby position, and is connected to an operating member 15 via a wire or the like. The operating member 15 is provided in an exposed state on the rear surface of the housing 1, and functions as a switch that releases the locking operation of the pressing body 6 by the locking member 14.

[0025] Next, a method of using the fire spread prevention device 100 according to the embodiment will be described mainly with reference to FIGS.

[0026] When the fire spread prevention device 100 is not in use, the pressing body 6 is held (locked) in a standby position shown by a solid line in FIG. 6 by the locking member 14, and the compression coil spring 13 receives a compression load from the pressing body 6 and stores elastic energy. The first support rod 3 and the second support rod 4 are laid in a substantially horizontal position inside the housing 1, and the non-flammable sheet 5 is folded and stored inside the housing 1. The inside of the housing 1 is covered by a pair of top plates 8, and these top plates 8 are arranged with their tips overlapping each other. Therefore, even if the housing 1 is installed outdoors, rainwater and dust are prevented from entering the housing 1 through the joint between the two top plates 8.

[0027] Here, the length of the first support rod 3 and the second support rod 4 housed in the housing 1 and the size of the non-flammable sheet 5 are appropriately set according to the place of use of the fire spread prevention device 100. For example, when the fire spread prevention device 100 according to the embodiment is used for a two-story house, the average height of a two-story house is about 6 m, so that the length of the first support rod 3 and the second support rod 4 are both 6 m, and the non-flammable sheet 5 with a semicircular base of 12 m is used.

[0028] When a fire breaks out in one of the adjacent buildings, first, the fire spread prevention device 100 is installed between the buildings at the fire site. At that time, even if the fire spread prevention device 100 is stored in a place away from the fire site, the transport rollers 10 are attached to the bottom surface of the housing 1, so that the fire spread prevention device 100 can be easily moved to the desired location.

[0029] After installing the fire spread prevention device 100 between buildings in this way, the operating member 15 exposed on the rear surface of the housing 1 is operated manually or by foot to release the locking action of the pressing body 6 by the engaging member 14. As a result, the pressing body 6 is guided by the guide shaft 12 by the stored force of the compression coil spring 13 and moves vigorously from the standby position to the operating position.

[0030] As shown by the two-dot chain line in FIG. 6, the unlocked pressing body 6 moves in the direction of arrow P1 along the inclined guide 16 while gradually pointing the tip side upward. As a result, the first support rod 3 is pushed by the first drive unit 6a of the pressing body 6 and rotates, and the rotating body 2 rotates in the direction of arrow P2 around the rotation axis 2a. Furthermore, prior to the first support rod 3, the second support rod 4 is pushed by the second drive unit 6b of the pressing body 6 and rotates, and this second support rod 4 rotates in the direction of arrow P2 within the cutout portion 2c of the rotating body 2 around the rotation unit 4a. Note that when the second support rod 4 is pushed by the second drive unit 6b and rotates to a position beyond the vertical line, it automatically rotates in the direction of arrow P2 by its own weight.

[0031] As shown in FIG. 7, when the pressing body 6 moves to the operating position at the end of the moving direction, the first support rod 3 rotates to an angle at which it takes an upright posture (vertical posture), and at this point, the rotation of the rotating body 2 is stopped by a stopper (not shown). The second support rod 4 rotates in the notch 2c by its own weight and stops at a position where its tip abuts on the ground. Then, with the rotation of the first support rod 3 and the second support rod 4, the non-flammable sheet 5 is pulled out from the housing 1 and opened in a semicircular shape. As a result, the non-flammable sheet 5 pulled out from the housing 1 extends between the buildings, and this non-flammable sheet 5 is opened in a semicircular shape with a base length approximately twice the length of the first support rod 3 and the second support rod 4, so that it is possible to prevent the flames of a fire that has broken out in one building from heading toward the other building.

[0032] In addition, while the pressing body 6 is moving from the standby position to the operating position, the top plate 8 covering the top surface of the housing 1 is pushed up to the open position by the standing piece 17 provided on the pressing body 6, so the first support rod 3 and the second support rod 4 can rotate without being hindered by the top plate 8. In addition, the front plate 9 covering the front surface of the housing 1 is released by the operating protrusion 2b formed on the rotating body 2, so the second support rod 4 can rotate without being hindered by the front plate 9.

[0033] As described above, the fire spread prevention device 100 according to this embodiment can provide the following advantageous effects.

[0034] The device comprises a housing 1 having an opening on an upper surface, a rotating body 2 rotatably supported inside the housing 1, a first support rod 3 fixed to the rotating body 2 and protruding outward from the circumferential surface, a second support rod 4 rotatably provided around the rotation axis of the rotating body 2, a non-flammable sheet 5 connected to the first support rod 3 and the second support rod 4, a pressing body 6 movable from a standby position to an operating position, and a drive device (driving means) 7 for driving the pressing body 6. The first support rod 3 is rotated to a substantially vertical upright position by the pressing body 6 that has moved to the operating position, and the second support rod 4 is rotated to an angle at least exceeding a vertical line by the pressing body 6 that has moved to the operating position. Therefore, the non-flammable sheet 5 stored compactly within the housing 1 can be pulled out of the housing 1 and spread out widely as the first support rod 3 and the second support rod 4 rotate, thereby realizing a fire spread prevention device 100 that is suitable for miniaturization and highly convenient.

[0035] Furthermore, a slit-shaped notch 2c extending in the circumferential direction is formed in the rotor 2, and the second support rod 4 has a rotating part 4a inside the rotor 2 and protrudes from the rotating part 4a through the notch 2c to the outside of the rotor 2, so that the first support rod 3 and the second support rod 4 are integrally disposed in the rotor 2, simplifying the structure and improving the ease of assembly. However, the second support rod 4 may be disposed on the outside side of the rotor 2 without forming the notch 2c in the rotating part 4a.

[0036] In addition, the pressing body 6 has a first drive unit 6a that rotates the first support rod 3 and a second drive unit 6b that rotates the second support rod 4, and the second drive unit 6b is configured to rotate the second support rod 4 prior to the first support rod 3. Therefore, the second support rod 4 can be rotated to an angle that forms a vertical line before the first support rod 3 reaches an upright position, and the second support rod 4 that has passed the vertical line can be automatically rotated to the released position by its own weight.

[0037] The housing 1 is also provided with an upper plate 8 capable of opening and closing the opening on the top surface, and the upper plate 8 is configured to be opened by a standing piece (operating part) 17 provided on the pressing body 6 while the pressing body 6 is moving from the standby position to the operating position, so that the upper plate 8 can prevent rainwater and dust from entering the housing 1 when the fire spread prevention device 100 is stored, and the upper plate 8 can be opened so as not to interfere with the first support rod 3 and the second support rod 4 when the fire spread prevention device 100 is used. The opening on the top surface of the housing 1 may be covered by a single upper plate 8. The operating part that opens the upper plate 8 can also be provided on the rotating body 2 instead of the pressing body 6.

[0038] In addition, by fixing the center of the non-flammable sheet 5 formed into an approximately semicircular shape to the first support rod 3 and one end of the base to the second support rod 4, and pulling such non-flammable sheet 5 out from the housing 1 as the first support rod 3 and the second support rod 4 rotate, the non-flammable sheet 5 spread out in a semicircular shape can be placed between buildings at the fire scene, thereby preventing the spread of fire over a wide area.

[0039] Furthermore, a partition plate 11 extending in a direction perpendicular to the rotation axis 2a of the rotor 2 (X-axis direction) is installed inside the housing 1, and a pair of a first support rod 3 and a second support rod 4 are arranged at two locations on both sides opposite each other across the partition plate 11, so that when the fire spread prevention device 100 is in use, two rows of non-flammable sheets 5 are pulled out from the housing 1, and the fire spread prevention effect can be enhanced by these double non-flammable sheets 5. Furthermore, because the partition plate 11 is installed between the two rows of non-flammable sheets 5 pulled out from the housing 1, the partition plate 11 can be used as a travel path.

[0040] In addition, since the housing 1 is provided with a plurality of conveying rollers 10 protruding from the bottom surface, even if the fire spread prevention device 100 is stored in a location away from the fire scene, it can be easily moved to a position of use using the conveying rollers 10.

[0041] In addition, the driving device 7, which is the driving means, is configured to include a guide shaft 12 that guides the movement of the pressing body 6, a compression coil spring 13 that applies a driving force to the pressing body 6, a locking member 14 that holds the pressing body 6 in a standby position against the driving force of the compression coil spring 13, and an operating member 15 that unlocks the locking member 14 and applies the driving force of the compression coil spring 13 to the pressing body 6.Therefore, even in a situation where the power is cut off during an earthquake, the locking operation of the locking member 14 can be released by manually or foot operating the operating member 15, and the fire spread prevention device 100 can be used.

[0042] Furthermore, after a fire has broken out and the fire spread prevention device 100 has been used, the pressing body 6 can be returned to the standby position against the spring force of the compression coil spring 13 to lock it, and the non-flammable sheet 5 can be stored in the housing 1 together with the first support rod 3 and the second support rod 4, allowing the fire spread prevention device 100 to be used repeatedly.

[0043] In addition, the pressing body 6 is movable along the axial direction of the guide shaft 12 and is rotatable around an axis parallel to the rotation axis 2a of the rotating body 2, and an inclined guide 16 is provided on the inner surface of the housing 1 facing the guide shaft 12, which guides the pressing body 6 diagonally upward from the standby position toward the operating position, so that the first support rod 3 and the second support rod 4 can be rotated smoothly.

[0044] Next, a description will be given of a modified example of the rotating body 2 provided in the fire spread prevention device 100. Fig. 8 is a perspective view of the rotating body 2 according to the modified example, and Fig. 9 is a cross-sectional view of the rotating body 2 according to the modified example.

[0045] 8 and 9, in the rotor 2 according to the modified example, the fixed end of the first support rod 3 and one end of the notch 2c are misaligned in the circumferential direction, and one end of the notch 2c extends to an upstream position in the rotation direction P2 relative to the first support rod 3. As a result, the first support rod 3 is held within the housing 1 in a substantially horizontal position, and the second support rod 4 is held within the housing 1 in a position tilted downward with respect to the horizontal plane.

[0046] In the modified example configured in this manner, when the pressing body 6 moves diagonally upward along the inclined guide 16, the pressing body 6 pushes up the second support rod 4 and then pushes up the first support rod 3, so that the second support rod 4 can be rotated prior to the first support rod 3.

[0047] The present invention is not limited to the above-mentioned embodiment, and various modifications are possible without departing from the gist of the present invention, and all technical matters included in the technical ideas described in the claims are the subject of the present invention. The above-mentioned embodiment shows a preferred example, but a person skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the attached claims.

[0048] For example, instead of the driving device 7 using the compression coil spring 13 as a driving source, a driving device using a motor or compressed gas as a driving source can be used as a driving means for the pressing body 6. Also, instead of the compression coil spring 13, a leaf spring or a torsion spring can be used as a spring member that applies a driving force to the pressing body 6.

[0049] Furthermore, the shape and number of non-flammable sheets 5 can be appropriately selected depending on the location of use of the fire spread prevention device 100. For example, in the case of a fire spread prevention device 100 used in a place where the space between buildings is narrow, only one pair of the first support rod 3 and the second support rod 4 may be used, and a row of non-flammable sheets 5 connected to the first support rod 3 and the second support rod 4 may be stored in the housing 1. [Explanation of symbols]

[0050] 1 Case 2 Rotating body 2a Rotation axis 2b Actuating protrusion 2c Notch 3 1st support rod 4 Second support rod 4a Rotating part 5. Non-flammable sheet 6 Pressing body 6a First drive unit 6b Second drive unit 7 Driving device (driving means) 8 Top plate 9 Front plate 10 Conveyor roller 11 Partition 12 Guide shaft 13 Compression coil spring (spring component) 14 Locking member 15 Operating member 16 Inclined Guide 17 Standing piece (operating part) 100 Fire prevention device

Claims

1. A housing having an opening on an upper surface thereof; A rotor rotatably supported within the housing; A first support rod fixed to the rotor and protruding outward from a peripheral surface of the rotor; A second support rod provided rotatably around a rotation axis of the rotating body; a non-combustible sheet connected to the first support rod and the second support rod; A pressing body movable from a standby position to an operating position; A driving means for driving the pressing body; Equipped with The first support rod is rotated to a substantially vertical standing position by the pressing body that has moved to the operating position, The second support rod is rotated by the pressing body that has moved to the operating position to an angle that exceeds at least a vertical line. A fire spread prevention device characterized by:

2. The fire spread prevention device according to claim 1, The rotor has a slit-shaped notch extending in a circumferential direction, The second support rod has a rotating portion inside the rotating body and protrudes outward from the rotating body through the notch portion. A fire spread prevention device characterized by:

3. The fire spread prevention device according to claim 1, The pressing body has a first driving part which rotates the first support rod and a second driving part which rotates the second support rod, The second drive unit is configured to rotate the second support rod prior to the first support rod. A fire spread prevention device characterized by:

4. The fire spread prevention device according to claim 1, the housing includes a top plate capable of opening and closing the opening, The pressing body or the rotating body is provided with an operating portion that performs an opening operation on the upper plate, The operating portion is configured to push up the upper plate from a closed position to an open position during the movement of the pressing body. A fire spread prevention device characterized by:

5. The fire spread prevention device according to claim 1, The non-flammable sheet is formed in a substantially semicircular shape, A central portion of the non-combustible sheet is fixed to the first support rod, and one end of the non-combustible sheet is fixed to the second support rod. A fire spread prevention device characterized by:

6. The fire spread prevention device according to claim 1, A partition plate extending in a direction perpendicular to the rotation axis of the rotor is installed inside the housing, A pair of the first support rod and the second support rod is installed on both sides of the partition plate, the pair being opposed to each other. A fire spread prevention device characterized by:

7. The fire spread prevention device according to claim 1, The housing includes a plurality of conveying rollers protruding from a bottom surface. A fire spread prevention device characterized by:

8. The fire spread prevention device according to claim 1, The driving means includes a spring member that applies a driving force to the pressing body, a locking member that holds the pressing body at the standby position against the driving force of the spring member, and an operating member that operates the locking member to apply the driving force of the spring member to the pressing body. A fire spread prevention device comprising:

9. The fire spread prevention device according to claim 8, A guide shaft for guiding the movement of the pressing body is installed inside the housing, The spring member is a compression coil spring wound around the guide shaft. A fire spread prevention device characterized by:

10. The fire spread prevention device according to claim 9, The guide shaft is installed in a direction perpendicular to the rotation axis of the rotor, the pressing body is movable along the axial direction of the guide shaft and is rotatable about an axis parallel to the rotation axis of the rotating body, An inclined guide is provided on a side of the guide shaft to rotate the pressing body obliquely upward from the standby position toward the operating position. A fire spread prevention device characterized by:

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