WO2007142079A1

WO2007142079A1 - Roll-up shutter

Info

Publication number: WO2007142079A1
Application number: PCT/JP2007/060899
Authority: WO
Inventors: Ichiro Takahashi; Hiromichi Yamada; Manfred Seysen
Original assignee: Fujita Corporation; Efaflex Japan K.K.
Priority date: 2006-06-07
Filing date: 2007-05-29
Publication date: 2007-12-13
Also published as: JPWO2007142079A1; KR101312337B1; CN101443524A; JP5191891B2; CN101443524B; KR20090025210A

Abstract

[PROBLEMS] A roll-up shutter having excellent fire protection performance, capable of being quickly opened and closed, and capable of using a large-sized shutter curtain. [MEANS FOR SOLVING PROBLEMS] Each slat (18) of the shutter curtain (12) of the roll-up shutter (10) is an aluminum alloy profile member having a predetermined cross-sectional shape. The profile member has a pair of side face walls, an upper edge section for connecting together side edge sections on the upper side of the pair of side face walls, and a lower edge section for connecting together side end edges on the lower side of the pair of side face walls. A labyrinth (50) is formed by and between the lower edge section (42) of the upper of two vertically adjacent slats and the upper edge section (40) of the lower. Also, when vertically two adjacent slats have different amounts of bending deformation caused by a temperature difference between both side faces of each slat, no gap is formed between the two slats because the lower edge section of the upper slat and the upper edge section of the lower slat are engaged with each other.

Description

Specification

Raised shutter

Technical field

[0001] The present invention relates to a lifting shutter, and more specifically, a shutter curtain configured by vertically connecting a plurality of metal slats extending in the horizontal direction, and removing the shutter curtain and the cage. The present invention relates to a scooping shutter provided with a scissor mechanism for returning and lifting the shutter curtain and a pair of guide rails for guiding both side edges of the shutter curtain when the shutter curtain is lifted and lowered.

Background art

[0002] A shutter curtain configured by vertically connecting a plurality of metal slats extending in the horizontal direction, a scraping mechanism for lifting and lowering the shutter curtain by scraping and unwinding the shutter curtain, and a shutter A lifting shutter equipped with a pair of guide rails for guiding both side edges of the shutter curtain when the curtain is raised and lowered is widely used as a shutter for closing a building entrance and a facility gate. Yes. References disclosing this type of lifting shutter include, for example, Japanese Patent Laid-Open Nos. 10-148072 and 2001-49976.

[0003] This type of lifting shutter is also widely used as a fire shutter. In many large buildings, the interior of the building is divided into multiple sections by fire walls, and when a fire breaks out in any of the sections, at least a predetermined time elapses from the point of the fire. Until then, the fire has been confined to the area where the fire has occurred, so that the spread of fire to adjacent areas can be prevented. In addition, fire doors and / or fire shutters are installed at the openings of the fire walls that pass when people and goods move between the P-contacting compartments. In particular, in an opening that is desired to be kept open on a daily basis, such as in a corridor, a lifting shutter is often installed as a fire protection shutter. Conventionally, steel plates have been used as the material for the shutter curtain metal slats. The steel plate was used because it was a low-priced and high-strength material, and the fire-proofing required to be installed by laws and regulations. It is stipulated that the shutter should be equipped with a shutter curtain made of steel plate, which is one factor that delays the development of fire protection shutters with shutter curtains made of metal materials other than steel plate. It was.

Patent Document 1: Japanese Patent Laid-Open No. 10-148072

Patent Document 2: Japanese Patent Laid-Open No. 2001-49976

Disclosure of the invention

Problems to be solved by the invention

[0005] A frequent problem in designing a lifting shutter is that a large lifting torque is required because the shutter curtain is heavy. Since the electric motor for raising the shutter curtain occupies a small part of the overall cost of the raising shutter, it is difficult to use a high-power electric motor for economic reasons. For this reason, normally, a reduction mechanism with a large reduction ratio is used to obtain a large torque with a relatively small electric motor. As a result, the moving speed of the shutter curtain is much lower than the upper limit speed that is required to be lower than that for safety reasons. It was slower than necessary. However, the weight of the shutter curtain increases remarkably as the height and width of the shutter curtain increase. Therefore, the higher the shutter force is, the more slowly it moves up and down. Great deals ,. This has been a major limitation in using a large-scale lifting shutter.

[0006] Therefore, if the weight of the shutter curtain of the lifting shutter is reduced, a great advantage can be obtained thereby. More specifically, the lighter 一 allows the use of a larger ten-dimensional shutter force, so it is possible to close the wide opening with a high ceiling and close it with a shutter. For example, even in a large factory building with a large floor area and high ceiling, a fire shutter can be installed in the building. In addition, since the shutter curtain can be moved up and down at high speed, a fire shutter that is always closed and opened only when people or goods pass through is installed in the opening where people and goods pass frequently. Is possible. Conventional lifting shutters have been impossible or difficult to use for these purposes. [0007] The present invention has been made in view of such circumstances, and an object of the present invention is to have an excellent fire prevention performance, to be able to open and close quickly, and to use a large shutter curtain. It is to provide an improved lifting shutter.

Means for solving the problem

[0008] In order to achieve the above object, a lifting shutter according to the present invention includes a shutter curtain configured by vertically connecting a plurality of metal slats extending in the horizontal direction, A lifting shutter provided with a winding mechanism that rewinds and raises and lowers the shutter curtain, and a pair of guide rails that guide both side edges of the shutter curtain when the shutter curtain is raised and lowered. The tenth of the shutter force includes a pair of metal chains extending along both side edges of the shutter curtain, and each chain includes a plurality of metals connected in series so as to be pivotable with respect to each other. It is made up of manufactured links. Each slat of the shutter curtain is fixed to a link corresponding to the slat of the pair of chains, thereby connecting the plurality of slats to each other. Each slat of the shutter curtain is made of an aluminum alloy profile material having a constant cross-sectional shape, and the profile material interconnects a pair of side walls and an upper side edge of the pair of side walls. It has an edge and a lower edge that interconnects the lower side edges of the pair of side walls. Of the two slats adjacent to each other in the shutter curtain, the labyrinth is formed between the two adjacent slats by the lower edge of the upper slat and the upper edge of the lower slat. It is formed. Furthermore, when the amount of bending deformation of each slat generated due to the temperature difference between the two side surfaces of each slat of the shutter curtain is different between two vertically adjacent slats, the difference in the amount of deformation occurs. If there is a gap between the two slats, the lower edge of the upper slat and the upper edge of the lower slat will be engaged. To prevent it.

The invention's effect

[0009] According to the lifting shutter of the present invention, since the shutter curtain is significantly lighter than the conventional shutter curtain made of steel plate, a relatively large shirt curtain is used. Can also be moved up and down at high speed Therefore, the lifting shutter can be opened and closed quickly. This uplifting shutter has excellent fire protection performance.

Brief Description of Drawings

[0010] [FIG. 1] A is a front view of a lifting shutter according to a preferred embodiment of the present invention, B is a sectional side view taken along line B_B, and C is a sectional plan view taken along line C_C. It is.

[FIG. 2] A is a rear view of the shutter curtain of the lifting shutter of FIG. 1, and B is a cross-sectional side view taken along line B_B.

FIG. 3 is a cross-sectional plan view of the upright shutter post of FIG. 1, showing the guide rail and the roller in detail.

[FIG. 4] A and B are sectional views of the slats of the shutter curtain of FIG.

FIGS. 5A to 5E are cross-sectional views showing various sealing materials used for the slats of FIG.

6 is a sectional side view of the shutter box of the lifting shutter of FIG.

FIG. 7 is a view similar to B of FIG. 4, showing a metal strip.

[FIG. 8] FIGS. 8A and 8B are sectional views of a shutter curtain according to a modified example that can be used in place of the shutter curtain of FIG.

FIG. 9 is an enlarged cross-sectional view of the upper and lower edges of the slat of FIG. 8, showing the packing attached to the upper edge of the slat.

FIG. 10A is a partial front view of a shutter curtain according to another modified example in which the shutter curtain of FIG. 8 is further modified, and B is a cross-sectional view taken along the line BB.

FIG. 11 is a cross-sectional plan view of a support similar to the support of FIG. 3, showing the relationship between the shutter curtain aperture and the guide rail of FIG.

Explanation of symbols

[0011] 10 …… Raised shutter

12, 12 ', 12 "…… Shutter curtain

14 …… Shutter box

15 …… Posts

16, 16 "…… Guide rail,

18, 18, 18 "…… slack 20

22, 22 ', 22 "· · · · · · Chain

24, 24 ', 24 "...

26, 26 ', 26 "-·-... steel shaft

30, 30 ', 30 "---... Laura

40, 40, ... Upper edge of Slanoto

42, 42 '…… Lower edge of Slanoto

50, 50 '…… Labyrinth

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 1A is a front view of a lifting shutter 10 according to a preferred embodiment of the present invention, B is a sectional side view taken along line B-B, and C is a sectional plan view taken along line C-C. It is. As shown in FIGS. 1A to 1C, the lifting shutter 10 includes a shutter curtain 12, a shutter box 14 fixedly attached to a building, and a pair of vertically extending columns fixedly attached to the building. 15 and the support column 15 is made of a hollow steel column. The hoisting shutter 10 further includes a pair of vertically extending guide rails 16, and the guide rails 16 are fixedly mounted inside the pair of support columns 15.

[0013] The shutter curtain 12 is configured by vertically connecting a plurality of metal slats 18 extending in the horizontal direction. The shutter box 14 accommodates a scraping mechanism 20 that retracts and rewinds the shutter curtain 12 and moves the shutter curtain 12 up and down. The pair of guide rails 16 guide both side edges of the shutter curtain 12 when the shutter curtain 12 is raised and lowered, and the upper ends of the guide rails 16 are connected to the spiral rail 21 of the scraping mechanism 20 described later. Connected.

FIG. 2A is a rear view of the shutter curtain 12, and B is a cross-sectional side view taken along the line BB. As shown in these drawings, the shutter curtain 12 includes a pair of metal chains 22 extending along both side edges of the shutter curtain 12, and each chain 22 is pivoted with respect to each other. It is composed of a plurality of aluminum alloy links 24 movably connected in series. Two adjacent links 24 in each chain 22 are horizontal A steel shaft 26 extending in the direction is pivotally connected to each other, and an aluminum alloy roller 30 is rotatably attached to the tip of the shaft 26. Each slat 18 of the shirt curtain 12 is fixed with a screw 25 to a link 24 corresponding to the slat 18 of the pair of chains 22, so that the plurality of slats 18 of the shutter curtain 12 has a pair of chains 22. Are connected to each other.

FIG. 3 is a sectional plan view of the support column 15 and shows the guide rail 16 and the roller 30 in detail. As shown in the figure, the roller 30 includes a flange 32 at the outer end thereof. In addition, the guide rail 16 is configured by connecting the first member 16a and the second member 16b, and both the members 16a and 16b are an aluminum having a certain cross-sectional shape manufactured by extrusion. Made of alloy profile material. The guide rail 16 has a pair of mutually parallel inner wall forces, guide surfaces 34a and 34b, and the peripheral edge portion of the flange 32 of the roller 30 abuts against the guide surfaces 34a and 34b. Rolls along the guide rail 16. In addition, the guide surfaces 34 a and 34 b have a considerably large width in the axial direction of the roller 30. This is because when a fire breaks out in the building where the lifting shutter 10 is installed and the slat 18 of the shutter curtain 12 undergoes a large thermal expansion in the longitudinal direction (horizontal direction), the roller 30 This is because the guide rail 16 can guide the roller 30 while allowing the guide rail 16 to be displaced outward in the longitudinal direction of the slat 18. Convex ridges 35a and 35b are formed on the outer edges of the pair of guide surfaces 34a and 34b, respectively, and the flange 32 of the roller 30 is separated from the guide surfaces 34a and 34b by the ridges 35a and 35b. Is preventing.

[0016] The scraping mechanism 20 includes a drive shaft 37 that is rotationally driven by a drive motor 36 via a speed reduction mechanism, and an arm (not shown) coupled to the drive shaft 37 causes the shutter curtain 12 to The upper end edge is guided along the spiral rail 21 and at the same time, the lower end edge of the shutter curtain 12 is pulled up by a belt lifting mechanism (not shown) connected to the drive shaft 37. Therefore, the shutter curtain 12 can be raised. Further, by rotating the drive motor 36 in the reverse direction, the shutter curtain 12 can be lowered. The drive motor 36 for these operations is controlled via a publicly known control circuit. When using it as a thermal detector, a fire sensor using a thermal sensor or smoke detection sensor should be connected to the control circuit. In addition, the lifting / lowering operation of the lifting shutter 10 is

This is done at a much higher speed than the conventional lifting speed of the shutter. Shutter force An edge rubber 38 made of refractory rubber is attached to the lower end of the ten ten 12 and a buffer panel mechanism (not shown) is installed to absorb the impact when the edge rubber 38 lands on the floor. .

A and B in FIG. 4 are cross-sectional views of the slat 18. The slats 18 of the shutter curtain 12 are all of the same shape except for the uppermost slats and the lowermost slats, and are made of an aluminum alloy profile material having a constant cross-sectional shape manufactured by extrusion. .

[0018] As shown in FIG. 4A, the profile material forming the slat 18 is a pair of side walls.

39a, 39b, an upper edge 40 interconnecting the upper side edges of the side walls 39a, 39b, and a lower edge 42 interconnecting the lower side edges of the side walls 39a, 39b, There are at least two reinforcing walls 44 between the upper edge portion 40 and the lower edge portion 42 and extending in the horizontal direction and interconnecting the pair of side walls 39a, 39b. The illustrated slat 18 has a width dimension (height dimension) of about 150 mm, a thickness (dimension between both sides) of about 30 mm, and the side wall 38 and the reinforcing wall 44 have a thickness of about 2.5 mm. . However, these dimensions are merely a specific example, and it goes without saying that these dimensions are variously set according to the specific requirements of the lifting shutter. Since the slat 18 having the above configuration is extremely light compared to the steel slats that have been widely used in the past, a large shutter curtain can be easily configured by using the powerful slats 18. .

[0019] FIG. 4B shows a part of each of the two slats adjacent to each other up and down in the shutter curtain 12 when the shutter curtain 12 is in a lowered state, that is, in a state in which the shutter curtain 12 is not scraped. FIG. 5 shows a lower edge 42 of the upper slat 18 and an upper edge 40 of the lower slat 18. Point P in the figure is the axis of the shaft 26 (see A and B in Fig. 2) that pivots the two links 24 of the chain 22 to which the two slats 18 shown in the figure are fixed. Thus, when the shutter curtain 12 is trimmed, the two slats 18 shown rotate relative to this point P. [0020] In the configuration of the shutter curtain 12, the link 24 of the chain 22 is attached to the outer surface of one of the pair of side walls 39a, 39b of the slat 18, and the roller 30 is connected to the chain 22 It is rotatably attached to a steel shaft 26 that connects the two links 24 together.

[0021] When the shutter curtain 12 is in the lowered state, as shown in FIG. 4B, the lower edge of the upper slat 18 among the two slats adjacent to each other vertically in the shutter curtain 12. A labyrinth 50 is formed between the two adjacent slats 18 by 42 and the upper edge 40 of the lower slat 18. This labyrinth 50 consists of a bent passage with four corners, and in order to form a labyrinth of this shape, a ridge 52 is formed at the lower end 42 of the slat 18 as shown in FIG. A concave groove 54 is formed in the upper edge 40 of the slat 18.

[0022] Since the labyrinth 50 is formed in this way, the gas that passes through the gap between two vertically adjacent slats 18 and blows out to one side of the shutter curtain 12 to the other side. Resistive force acts on the flow of air and the blow-through is suppressed. This is important in suppressing the blow-through of a flame in the event of fire when the lifting shutter 10 is used as a fire shutter. This blow-through suppressing function is improved as the passage width of the labyrinth 50 is reduced. If the passage width is too narrow, the relative distance between the two adjacent slats 18 when the shutter curtain 12 is scraped. Rotation may not be performed smoothly. Therefore, if it is expected that the labyrinth 50 alone will not provide a sufficient blow-through suppression function, it is better to use the sealing materials 60a and 60c to 60e as shown in A to E of FIG. Locking grooves 56 (FIG. 4B) for attaching these sealing materials are formed in the upper edge portion 40 and the lower edge portion 42 of 18.

[0023] The sealing materials 60a and 60c to 60e shown in the cross-sectional views in FIGS. 5A to 5E are members that extend over the entire length of the slats 18, both of which are shifted. The sealing material 60a shown in FIG. 5A is made of a stainless steel thin plate, and curled portions that engage with the locking grooves 56 of the slats 18 are formed on both side edges, and the central portion is shallow and bent. It has a shape. The steel shown in B of FIG. 5 is a combination of the sealing material 60a and a steel rod 61 that prevents the sealing material 60a from coming off the slats 18. The steel rod 61 is attached to the slat 18 after the sealing material 60a is attached to the slat 18. Insert from 18 ends. In place of the steel rod 61, a steel pipe may be used. The sealing material 60c shown in FIG. 5C is made of a stainless steel thin plate, and bent portions that engage with the locking grooves 56 of the slats 18 are formed on both side edges thereof. A shallowly folded fold is formed. The encapsulant 60d shown in FIG. 5D is made of stainless steel, and has bent portions for screwing the encapsulant 60d to the slats 18 on both side edges. . The sealing material 60e shown in E of FIG. 5 is made of a flexible fireproof sheet. As the flexible fireproof sheet, an aluminum foil-clad glass cloth or a tetrafluorinated styrene resin-coated alumina silica cloth is used. Etc. can be used. Both side edges of the sealing material 60e are sewn in a bag shape, and a ceramic rope 62 is enclosed therein. This sealing material 60 a is inserted into the end of the slat 18 by being finished by sewing the ceramic rope 62 into the side edge of the flexible fireproof sheet. Instead of the ceramic port 62, a steel pipe may be used.

[0024] The sealing materials 60a and 60c to 60e prevent the gas that flows through the labyrinth 50 between the two slats 18 from blowing from one side of the shutter curtain 12 to the other side. It has stopped. However, since the space 64 surrounded by the slat 18 and the sealing materials 60a and 60c to 60e is continuous in the longitudinal direction of the slat 18, the labyrinth 50 and the space 64 are separated if no measures are taken. There is a risk that gas will flow from one side of the shutter curtain 12 to the other side. Therefore, in the lifting shutter 10, the upper edge and both side edges of the shutter curtain 12 are surrounded by the shutter box 14 and the pair of support columns 15, respectively, so as to suppress the gas flow through this path. Furthermore, this go structure also functions to protect the components of the lifting shutter 10 disposed inside the shutter box 14 and the support column 15 from a flame in the event of a fire. .

FIG. 6 is a cross-sectional side view of the shutter box 14 and shows a surrounding structure for surrounding the upper edge of the shutter curtain 12 when the shutter curtain 12 is in a lowered state. As shown in the figure, the shutter box 14 has a structure that is hermetically sealed except for a shutter curtain entrance 66 for the shutter curtain 12 to enter and exit. In the state shown in FIG. 6, the force of the shutter curtain 12 being removed When the shutter curtain 12 is lowered, the upper edge force of the shutter curtain 12 is located in the curtain entrance 66. A rubber seal 68a, 68b force S made of refractory rubber is attached to the shutter curtain entrance 66, and the front ends of the rubber seals 68a, 68b are in sliding contact with the surface of the slat 18, so that the shutter box 14 The inside is sealed.

Furthermore, heat-sensitive foam materials 70a and 70b are attached to the inside of the shutter box 14 in the vicinity of the shutter curtain doorway 66 via steel brackets 72a and 72b. The heat-sensitive foam materials 70a and 70b are known materials that foam and remarkably increase in volume when a high temperature is applied. The heat-sensitive foam materials 70a and 70b are arranged so that the surfaces thereof face the side walls of the slats 18. If the rubber seals 68a and 68b are exposed to a flame in the event of a fire, the rubber seals 68a and 68b may be melted even though they are made of refractory rubber. In such a case, the heat-sensitive foams 70a and 70b foam and seal the gap between the brackets 72a and 72b and the slats 18, so that the shutter box 14 is sealed, and the shutter box 14 is inside. The components of the installed lifting shutter 10 are protected from flames.

[0027] As shown in FIG. 3, each of the pair of hollow struts 15 is also equipped with rubber seals 74a, 74b, brackets 76a, 76b, and heat-sensitive foams 78a, 78b. The rubber seal 68a, 68b, bracket 72a, 72b, and heat-sensitive foam 70a, 70b installed in the shirt box 14 are made of the same material and in the same shape, and are arranged in the same way and perform the same function. Is. And the upper and both sides of the shutter curtain 12 are enclosed by the structure of the shutter box 14 and the support column 15, and the flow of gas around the upper and both sides of the shutter curtain 12 is blocked, especially in the event of a fire. Occasionally, the heat-sensitive foams 70a, 70b, 78a, 78b are foamed to provide a high degree of sealing.

[0028] Installed as a fireproof shutter to prevent the spread of fire in the event of a fire in the building If the building shutter 10 is lowered to close the opening of the building, the slat will be exposed to the flame and become hot 18 Since not only the size of the slat 18 increases, but usually only one side surface of the slat 18 is exposed to high temperature, so that the slat 18 is bowed so that the center in the longitudinal direction bulges to the high temperature side when viewed from above. Will cause thermal deformation. And this hail As described above, the slat 18 of the ter 10 is made of an aluminum alloy and has a higher coefficient of thermal expansion than steel, and therefore its thermal deformation tends to be large. In this regard, the reinforcing walls 44 of the slats 18 (see FIG. 4) are capable of increasing their strength by transferring heat between the pair of side walls 39a, 39b of the slats 18 in addition to the function of increasing the strength of the slats 18. It also functions to suppress the temperature difference between the walls 39a and 39b, thereby suppressing the bow-like thermal deformation of the slats 18 exposed to the flame. This thermal deformation suppressing function becomes stronger as the thickness and / or number of the reinforcing walls 44 of the slat 18 are increased.

[0029] Further, when a fire occurs in a building, the temperature in the fire occurrence area usually becomes higher as the height from the floor is higher. Therefore, the higher the slat 18 is, the greater the temperature difference between the two sides of the slat 18, and the greater the bow-shaped thermal deformation of the slat 18 with its center in the longitudinal direction bulging to the high temperature side when viewed from above. It becomes. In this regard, in this lift-up shutter 10, the bending deformation force of each slat 18 generated due to the temperature difference between the two side surfaces of each slat 18 of the shutter curtain 12 When the two slats 18 adjacent to each other are different The gap between the two slats 18 due to the difference in the amount of deformation of the two slats 18 and the lower edge 42 of the upper slat 18 of the two adjacent slats 18 The engagement with the upper edge 40 of the side slat 18 is prevented.

[0030] However, in FIG. 4B, when thermal deformation occurs such that the upper slat 18 is displaced relative to the lower slat 18 to the left in the figure, the thermal deformation occurs. If the length is very large, the ridges 52 may be disengaged from the concave grooves 54 and a gap may be formed between the upper and lower slats 18. If such a situation is expected, as shown in FIG. 7, the metal strip 82 is fixed to the upper edge 40 of the slat 18 with a screw through the spacer 80, as shown in FIG. This often means that when the amount of bending deformation of each slat caused by the temperature difference between the two side surfaces of each slat 18 of the shutter curtain 12 differs between the two adjacent slats 18 in the vertical direction, Of these two slats 18, the lower edge 42 of the upper slat 18 and the upper edge 40 of the lower slat 18 are prevented from being disengaged due to the difference in deformation. That power S. In the illustrated example, the metal strip 82 is fixed to the upper edge 40 of the slat 18 according to the shape of the upper edge 40 and the lower edge 42 of the slat 18. Depending on the structure of the bottom and bottom edges, the metal strip may be secured to the bottom edge of the slats. There are times when it's not necessary to see it.

Next, a shutter curtain 12 ′ according to a modified example that can be used in place of the shutter curtain 12 shown in A and B of FIG. 2 will be described with reference to A and B of FIG. A and B in FIG. 8 are cross-sectional views of the slats 18 ′ constituting the shutter curtain 12 ′. The shirt curtain 12 ′ connects a plurality of metal slats 18 ′ extending in the horizontal direction up and down. Configured. The plurality of slats 18 'are connected to each other via a pair of metal chains 22' extending along the side edges of the shutter curtain 12 'so that each chain 22' can pivot relative to each other. It is composed of a plurality of aluminum alloy links 24 'connected in series. The slat 18 ′ is made of an aluminum alloy profile file material having a constant cross-sectional shape manufactured by extrusion, similar to the slat 18 shown in FIGS. 4A and 4B.

[0032] As shown in FIG. 8A, the profile member forming the slat 18 'is composed of a pair of side walls 39a' and 39b 'and the upper side edges of the side walls 39a' and 39b '. An upper edge portion 40 ', a lower edge portion 42' interconnecting the lower side edges of the side walls 39a 'and 39b', and an upper edge portion 40 'and a lower edge portion 42'. And at least two reinforcing walls 44 'extending in the horizontal direction and interconnecting the pair of side walls 39a' and 39b '.

[0033] FIG. 8B shows a state of two slats 18 'adjacent to each other vertically in the shutter curtain 12' when the shutter curtain 12 'is lowered, that is, in a state where the shutter curtain 12' is not scraped. FIG. 6 is a view showing a part of each, and shows a lower edge portion 42 ′ of the upper slat 18 ′ and an upper edge portion 40 ′ of the lower slat 18 ′. The point P in the figure indicates the axial center position of the steel shaft 26 ′ that is pivotally attached to the two links 24 ′ of the chain 22 ′ to which the two slats 18 ′ shown in the figure are fixed. Thus, when the shutter curtain 12 'is scraped, the two slats 18' shown rotate relative to this point P.

[0034] Each slat 18 'of the shutter curtain 12' is linked to the slat 18 'of the pair of chains 22' in the same manner as each slat 18 of the shutter curtain 12 shown in FIGS. The link 24 'of the chain 22' is attached to the outer surface of one of the pair of side walls 39a 'and 39b' of the slat 18 '. Then, like the roller 30 shown in FIGS. 2A and 2B, a roller 30 ′ that rolls along the guide rail is It is rotatably mounted on a steel shaft 26 'connecting the links 24' of the chain 22 '.

[0035] When the shutter curtain 12 'is in the lowered state, as shown in FIG. 8B, the upper slat 18' of the two slats adjacent to each other vertically in the shutter curtain 12 '. The labyrinth 50 'is formed between the two adjacent slats 18' by the lower edge 42 'and the upper edge 40' of the lower slat 18 '. In addition, in order to form this labyrinth 50 ′, a concave groove 52 ′ is formed in the lower end portion 42 ′ of the slat 18 ′, and a ridge 54 ′ is formed in the upper edge portion 40 ′ of the slat 18 ′. It is formed.

FIG. 9 is an enlarged cross-sectional view of the upper edge portion 40 ′ of the slat 18 ′. As shown in FIG. 9, the ridge 54 ′ of the upper edge portion 40 ′ of the slat 18 ′ includes a packing 60 ′. A locking groove 56 'for mounting' is formed. The packing 60 'extends over the entire length of the slat 18'. Packing 60 'prevents the gas from blowing from one side of the shutter curtain to the other through the labyrinth 50' between the two slats 18 'adjacent to each other in the shutter curtain. In order to achieve this, a sealing material is interposed between the two adjacent slats. As a material for making packing 60 ', the shutter curtain is exposed to high temperature during fire, and when that high temperature is transmitted to packing 60', it adheres to slats 18 'above and below packing 60' without firing. Such a flame retardant elastomeric material is used. Suitable flame retardant elastomer materials having such properties include chloroprene rubber and silicone rubber. Shutter force with slats 18 'and packing 60' shown in Fig. 8 If a ten is exposed to high temperatures during a fire, the packing 60 'will stick to the upper and lower slats 18' without firing. In other words, the labyrinth 50 'between the slats 18' is kept sealed to prevent sticking of the flame through the labyrinth 50 '.

Therefore, the labyrinth 50 shown in FIG. 4 is a flow of gas that passes through a gap between two vertically adjacent slats 18 and blows one side force of the shutter curtain 12 to the other side. The labyrinth 50 'shown in Fig. 8 is directly exposed to the flame in the event of a fire. The purpose of this is to prevent the flame from being blown out by a packing 60 'made of a flame retardant elastomer material. Next, referring to A and B of FIG. 10 and FIG. 11, the shutter curtain according to another modified example in which the shutter force unit 12 ′ shown in A and B of FIG. 8 is further modified. This shutter curtain 12 "has a similar structure to the shutter curtain 12 'shown in A and B of FIG. 8, and the same structural portion will be described in detail. Only the different parts of the structure will be described in detail.

[0039] The shutter curtain 12 "is configured by connecting a plurality of metal slats 18" extending in the horizontal direction in an up-down direction. The plurality of slats 18 "are connected to each other via a pair of metal chains 22" extending along the side edges of the shutter curtain 12 ", and each chain 22" is pivotally connected to each other in series. The slats 18 "are the same as the slats 18 'constituting the shutter curtain 12' shown in FIGS. 8A and 8B. The packing 60 "mounted on the slat 18" is the same as the packing 60 'shown in FIG. The point P shown in Fig. 10B indicates that the steel shaft 26 pivotally connects the two links 24 'of the chain 22' to which the two adjacent slats 18 "are fixed respectively. When the shutter curtain 12 "is removed, the two slats 18" that are adjacent to each other in the vertical direction rotate relative to this point P as the center.

[0040] Each slat 18 "of the shutter curtain 12" corresponds to each slat 18 of the shutter curtain 12 shown in A and B of Fig. 2 and each slat 18 of the shutter curtain 12 'shown in A and B of Fig. 8. Like ', a link 24 "corresponding to the slat 18" of the pair of chains 22 "is fixed with screws, so that the link 24" of the chain 22 "is connected to the pair of side walls of the slats 18". Is attached to the outer surface of one of the side walls.

[0041] On the other hand, the roller 30 "that rolls along the guide rail is different from the roller 30 and 30 'of the shutter curtain described above, and is made of steel that connects the links 24" of the chain 22 ". It is rotatably mounted on a steel shaft 86 fixed to the roller shaft mounting bracket 84, not on the shaft 26 ". As shown in FIGS. 10A and 10B, the roller shaft mounting bracket 84 is inserted into the end portion of the slat 18 ", and a screw for fixing the link 24" of the chain 22 "to the slat 18" is screwed together. As a result, it is fixed to slat 18 "and link 24". The inner end of the steel shaft 86 is fixed to the roller shaft mounting hardware 84. A ring-shaped roller 30 "is rotatably mounted on the outer end via a ball bearing (not shown). The roller 30" is made of a synthetic resin material having a small frictional force against a metal material. It is press-fitted and fixed to the outer circumference of the ball bearing outer race.

FIG. 11 is a cross-sectional plan view of a support column 15 ″ containing a guide rail 16 ″ for guiding the shutter curtains 12 ″ of A and B of FIG. 9. As is apparent from FIG. The guide rail 16 "and the post 15" are configured in the same manner as the guide rail 16 and the post 15 shown in Fig. 3. In particular, the guide rail 16 "is the same as the guide rail 16, and a pair of each other It has guide surfaces 34a "and 34b" consisting of parallel inner wall surfaces, and the roller 30 "is brought into contact with the guide rail 16" by the outer peripheral surface of the roller 30 "coming into contact with the guide surfaces 34a" and 34b ". The width of the guide surfaces 34a ", 34b" in the axial direction of the roller 30 "is sufficiently larger than the width of the roller 30". This is because a fire broke out in a building with a raised shirt and the shutter curtain 12 " The guide rail 16 "can be displaced by the roller 30" while allowing the roller 30 "to be displaced outwardly in the longitudinal direction of the slat 18" when the belt 18 "undergoes significant thermal expansion in its longitudinal direction (horizontal direction). "It is to be able to guide." On the outer edges of the pair of guide surfaces 34a "and 34b", protrusions 35a "and 35b" are formed respectively, and these protrusions 35a "and 35b" This prevents the roller 30 "from coming off the guide surfaces 34a", 34b ".

[0043] In the shutter curtain 12 "configured as described above, the roller 30" is rotatably mounted on the steel shaft 86 disposed between the pair of side walls of the slat 18 "and attached to the slat 18". Therefore, the axial force of the roller 30 "is within the thickness of the slat 18". Compared to the shutter curtain 12 ′ shown in FIGS. 8A and B, this shutter curtain 12 ″ requires a roller shaft mounting hardware 84 and is expensive to manufacture, but it is smoother in raising and lowering motion. This is particularly preferable when a very large shutter curtain is used.

Claims

The scope of the claims

[1] A shutter curtain configured by vertically connecting a plurality of metal slats extending in the horizontal direction, and a scraping mechanism that lifts and lowers the shutter curtain by scraping and rewinding the shutter curtain. A lifting shutter provided with a pair of guide rails for guiding both side edges of the shutter force when the shutter curtain is raised and lowered, wherein the shutter curtain is a pair of metals extending along both side edges of the shutter curtain. Each chain is made up of multiple metal links that are pivotally connected to each other in series,

Each slat of the shutter curtain is fixed to a link corresponding to the slat of the pair of chains, whereby the plurality of slats are connected to each other, and each slat of the shutter curtain has a constant cross-sectional shape. The profile material is made of an aluminum alloy having a pair of side walls, an upper edge that interconnects the upper side edges of the pair of side walls, and a lower side of the pair of side walls. A lower edge interconnecting the side edges,

Of the two slats that are adjacent to each other in the shutter curtain, a labyrinth between the two adjacent slats by the lower edge of the upper slat and the upper edge of the lower slat. Is formed,

When the amount of bending deformation of each slat generated due to the temperature difference between both side surfaces of each slat of the shutter curtain is different between two adjacent slats in the vertical direction, the difference in the amount of deformation A gap between two slats is prevented by engaging the lower edge of the upper slat and the upper edge of the lower slat of the two adjacent slats. As is done,

Raised shutter characterized by that.

[2] The hoisting shutter according to claim 1, wherein the profile material includes at least one reinforcing wall between the upper edge portion and the lower edge portion and interconnecting the pair of side wall surfaces. .

[3] The labyrinth between two slats vertically adjacent to each other in the shutter curtain A sealing material installed between the two adjacent slats that prevents the gas from passing through the screen to one side of the shutter curtain and the other side. 2. The lifting shutter according to claim 1, wherein

4. The lifting shutter according to claim 3, wherein the sealing material is made of a thin plate of stainless steel.

[5] The hoisting shear w ^¾ — according to claim 3, wherein the sealing material is made of a flexible fireproof sheet.

[6] One side force of the shutter curtain that passes through the labyrinth between two slats that are vertically adjacent to each other in the shutter curtain and prevents the gas from being blown out to the other side. 2. The lifting shutter according to claim 1, further comprising a sealing material interposed between the two slats.

7. The lifting shutter according to claim 6, wherein the sealing material has a packing force made of a flame retardant elastomer material.

[8] When the amount of bending deformation of each slat generated due to the temperature difference between the two sides of each slat of the shutter curtain differs between two adjacent slats in the vertical direction, the difference in the amount of deformation Among these two slats, the metal strip force S to prevent the engagement between the lower edge of the upper slat and the upper edge of the lower slat, 2. The lifting shutter according to claim 1, wherein the shutter is fixed to one of the slats.

[9] The shutter curtain is provided with a plurality of rollers that roll along the guide rails on both side edges thereof, and the guide rails are configured so that when the slats of the shutter curtain undergo thermal expansion, 2. The hoisting shutter according to claim 1, wherein the roller is configured to guide the roller while allowing the roller to be displaced outward in the longitudinal direction of each slat.

[10] The link of the chain is attached to an outer surface of one side wall of the pair of side walls of the slat,

The roller is rotatably attached to a shaft connecting the links of the chain.

The lifting shutter according to claim 9. The link of the chain is attached to an outer surface of one side wall of the pair of side walls of the slat;

The roller is rotatably mounted on a shaft disposed between the pair of side walls of the slat and attached to the slat.

The lifting shutter according to claim 9.