JP6740153B2 - Smokeproof panel and method for assembling the same - Google Patents

Description

The present invention relates to a smoke proof panel used for a smoke proof wall.

Conventionally, in a smoke-proof wall that forms a smoke-proof compartment with a smoke-proof panel having a flexible smoke-proof sheet, many of the non-combustible smoke-proof sheets are fixed in a rectangular shape to the four sides with a frame material. It is on the market. Even in the structure in which the four sides are fixed by a frame, the smoke-proof sheet may expand due to changes in the ambient temperature, and wrinkles and bending may occur in the smoke-proof sheet. Further, although the smokeproof sheet has a certain amount of tension due to its own weight, depending on the installation location, a large flutter may occur due to the influence of wind or the like. In order to prevent the occurrence of such a phenomenon, there is known one having a structure in which the smoke-proof sheet is directly or indirectly pulled to apply tension to the smoke-proof sheet. For example, Patent Document 1 and Patent Document 2 disclose such a smoke barrier wall.

Patent Document 1 describes a smoke proof wall having a structure in which a biasing member for applying tension to a smoke proof sheet is incorporated in a lower frame located at a lower end portion. Patent Document 2 describes a configuration in which a smoke-proof sheet is stretched laterally on a vertical frame via end fittings and tension is applied to the smoke-proof sheet by a biasing member (spring) arranged at the lower portion.

JP, 2013-146471, A JP, 2005-029634, A

In the configurations described in Patent Document 1 and Patent Document 2, since the biasing member (spring) is arranged in the lower frame and tension is applied to the smoke proof sheet, a frame member that surrounds the four circumferences of the panel is provided. It is necessary to insert the biasing member so that the smoke-proof sheet is properly tensioned after being assembled. In order to insert the urging member later, some play is required in the lower frame as the urging member, but if the play is large, the smoke-proof sheet may not be sufficiently tensioned. It is difficult to set and artificial variation occurs. For example, although the biasing member is inserted depending on the skill level of the worker, it is conceivable that the tension due to the biasing member is not properly applied to the smoke-proof sheet. There is room for improvement in terms of improving the assembling ability so that the worker can stably put the smokeproof sheet regardless of the skill level.

The present invention, in the smokeproof panel of the smokeproof sagging wall, anyone can accurately and smoothly perform tensioning work on the smokeproof sheet to prevent the occurrence of wrinkles and flexure, regardless of proficiency level, It is an object of the present invention to provide a structure and an assembling method that maintain an appropriate tension even after construction.

A smoke proof panel used for a smoke proof wall (for example, a smoke proof panel 1, 201, 301 described later) having flexibility, and a smoke proof sheet (for example, a smoke proof sheet 25 described below), An upper frame (for example, an upper frame 22 described later) for fixing the upper end of the smoke sheet, a fixing member (for example, sandwiching members 61, 361 for the later described) that fixes the lower end of the smoke prevention sheet, and the smoke prevention sheet A lower frame (for example, a lower frame 23 described later) in which the fixing member that fixes the fixing member and a biasing member that biases the fixing member downward inside the lower frame (for example, a biasing member described later) The member 65, 365) and a holding member (for example, a screw 70 described later) that temporarily holds the fixing member biased by the biasing member above the smoke prevention panel.

It is preferable that the holding member is configured to be movable from a pressing position that presses the fixing member upward to a retracted position that releases or weakens the pressing.

A screw hole (for example, a screw hole 66 described later) is formed at a position of the lower frame corresponding to the urging member, the holding member is fastened from the screw hole, and the lower frame is pressed at the pressing position. It is preferable that the fixing member is a screw (for example, a screw 70 described later) that pushes the fixing member upward in the inside and loosens the fastening from the lower frame and moves to the retracted position.

It is preferable that the holding member is arranged below the biasing member at the pressing position.

A method for assembling a smoke proof panel used for a smoke proof wall (for example, smoke proof panels 1, 201, 301 described later), in which a lower end portion is fixed by a fixing member (for example, sandwiching members 61, 361 described later). A lower frame (for example, a later-described smoke-proof sheet 25) provided with an urging member (for example, later-described urging members 65, 365) for urging the fixing member downward. A step of attaching a lower frame 23) described below, a step of temporarily holding the fixing member biased by the biasing member above by a holding member (for example, a screw 70 described below), and at least the smoke-proof sheet With a top frame (for example, a top frame 22 to be described later) fixed to the upper end of the above, the temporary holding of the fixing member by the holding member is released.

According to the smoke-proof panel and the assembling method thereof of the present invention, anyone can accurately and smoothly perform the tensioning work on the smoke-proof sheet for preventing the occurrence of wrinkles and flexure, regardless of their proficiency level. Appropriate tension is maintained even after construction.

It is a figure which shows the state before tensioning a smoke-proof sheet in the smoke-proof panel which concerns on one Embodiment of this invention. It is a cross-sectional view showing a state before applying tension to the smoke-proof sheet in the smoke-proof panel of the present embodiment, and is a cross-sectional view taken along the line AA of FIG. 1. It is a longitudinal cross-sectional view showing a state before applying tension to the smoke-proof sheet in the smoke-proof panel of the present embodiment, and is a cross-sectional view taken along the line BB of FIG. 1. It is a schematic diagram which shows the tension|tensile_strength provision apparatus before tension|tensile_strengthening inside the lower frame of this embodiment. It is a figure which shows the state after applying a tension|tensile_strength to the smoke-proof sheet in the smoke-proof panel of this embodiment. FIG. 6 is a vertical cross-sectional view showing a state after applying tension to the smoke-proof sheet in the smoke-proof panel of the present embodiment, and is a cross-sectional view taken along line B′-B′ of FIG. 5. It is a schematic diagram which shows the tension|tensile_strength provision apparatus after tension|tensile_strengthening inside the lower frame of this embodiment. It is a schematic diagram which showed the procedure of the assembling method of the smoke proof panel of this embodiment. It is a longitudinal section of the smoke proof sheet of this embodiment. It is a cross-sectional view of the smoke proof panel of the 1st modification. It is a cross-sectional view of the smoke proof panel of the 2nd modification. It is a longitudinal cross-sectional view which shows the state before giving a tension to the smoke-proof sheet in the smoke-proof panel of the 3rd modification. It is an expanded longitudinal section showing the state before tension application of the tension application device of the 3rd modification. It is a schematic diagram which shows the tension|tensile_strength provision apparatus before tension|tensile_strengthening in the lower frame of a 3rd modification, Comprising: It is CC sectional view taken on the line of FIG. It is a longitudinal cross-sectional view which shows the state after tension|tensile_strength is applied to the smoke-proof sheet in the smoke-proof panel of the 3rd modification. It is an expanded longitudinal section showing the state after tension application of the tension application device of the 3rd modification. It is a schematic diagram which shows the tension|tensile_strength provision apparatus after tension|tensile_strengthening inside the lower frame of a 3rd modification, Comprising: It is the C'-C sectional view taken on the line of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The smoke-proof panel 1 of the present embodiment is used for a smoke-proof sagging wall that is disposed between a ceiling, a wall, or a pillar inside a building and forms a smoke-proof section, and a smoke-proof sheet at a predetermined timing after construction. This is a structure in which tension can be applied to 25. First, the smokeproof panel 1 before the tension is applied to the smokeproof sheet will be described.

FIG. 1 is a diagram showing a state before a tension is applied to a smoke proof sheet 25 in a smoke proof panel (smoke proof panel) 1 according to an embodiment of the present invention. In FIG. 1, one smoke-proof panel 1 is shown, but a plurality of smoke-proof panels 1 are laterally suspended from the ceiling so as to form a smoke-proof hanging wall.

As shown in FIG. 1, the smoke proof panel 1 is a panel composed of a smoke proof sheet 25 surrounded by left and right vertical frames 21, an upper frame 22 and a lower frame 23 on four sides. The smoke-proof sheet 25 is made of a non-combustible and flexible material, and is transparent or translucent.

FIG. 2 is a cross-sectional view showing a state before applying tension to the smoke-proof sheet 25 in the smoke-proof panel 1 of the present embodiment, and is a cross-sectional view taken along the line AA of FIG. As shown in FIG. 2, the insides of the left and right vertical frames 21 are hollow. A slit 35 communicating with the hollow portion is formed on the side surface (prospect surface) of the vertical frame 21. The lateral end of the smoke proof sheet 25 is inserted into the hollow portion of the vertical frame 21 through the slit 35.

A retaining member 31 formed to be larger than the slit 35 is arranged in the hollow portion of the vertical frame 21. The retaining member 31 includes a first fixing member 32 having a substantially U-shaped cross section and a second fixing member 33 having a substantially L-shaped cross section. One end of the smoke proof sheet 25 on the one side in the horizontal direction is inside the vertical frame 21 and is sandwiched by the first fixing member 32 and the second fixing member 33 in the thickness direction (expected direction) of the smoke proof panel 1. Even if the smoke-proof sheet 25 receives wind pressure, the smoke-proof sheet 25 is prevented from falling off the vertical frame 21.

In the retaining member 31 of the present embodiment, the width in the projected direction (the total width of the first fixing member 32 and the second fixing member 33) is substantially equal to the width of the hollow portion of the vertical frame 21 in the projected direction. Is composed of. More specifically, the side of the first fixing member 32 corresponding to the U-shaped opening faces outward in the expected direction, and the end portion abuts the inner wall of the vertical frame 21. The tip of the portion corresponding to the L-shaped end of the second fixing member 33 is in contact with the inner wall of the vertical frame 21 (the inner wall opposite to the inner wall with which the first fixing member 32 contacts). In addition, a bent portion 34 that bends inward is formed at an end portion of the slit 35 of the present embodiment on the first fixing member 32 side, and a tip portion of the bent portion 34 serves as a projected surface of the first fixing member 32. Are in contact.

The vertical frame 21 is fixed to a wall or another smokeproof panel (not shown) connected in series. For example, when the smoke prevention panels 1 are arranged in a row in the lateral direction, the vertical frame 21 on one side of the smoke prevention panel 1 arranged so as to face the wall is fixed to the wall, and the vertical frame 21 on the other side is adjacent. It will be fixed to the smokeproof panel 1. When forming a smoke-proof section with one long smoke-proof panel in the horizontal direction, the vertical frame 21 on one side of the smoke-proof panel 1 is fixed to the wall (or column) and the vertical frame on the other side is fixed. 21 is also fixed to another wall (or column). Alternatively, the vertical frames 21 on both sides of the smokeproof panel 1 may be fixed to the adjacent smokeproof hanging walls.

The lateral tension (proof strength) of the smoke-proof sheet 25 is adjusted by the width of the smoke-proof panel 1 (the lengths of the upper frame 22 and the lower frame 23 in the longitudinal direction). In the present embodiment, the smoke-proof sheet 25 is pulled by the right and left vertical frames 21 with an appropriate tension, so that the occurrence of wrinkles, bending, etc. is suppressed.

The upper frame 22 is fixed to the ceiling 5 via a ceiling frame and a fastening member such as a hook member or a screw (all are not shown). The upper frame 22 is composed of an upper frame main body 41 and an upper frame sheet holding portion 42 that sandwich the upper end of the smoke proof sheet 25 in the direction of sight. The upper frame 22 may be directly fixed to the ceiling 5.

FIG. 3 is a vertical cross-sectional view showing a state before applying tension to the smoke-proof sheet 25 in the smoke-proof panel 1 of the present embodiment, and is a cross-sectional view taken along the line BB of FIG. 1. FIG. 4 is a schematic diagram showing the tension applying device 60 before applying tension inside the lower frame 23 of the present embodiment. In FIG. 4, the inside of the lower frame 23 as viewed from the front side of the smoke prevention panel 1 is schematically shown.

As shown in FIGS. 3 and 4, the lower frame 23 has a hollow inside. A slit 50 communicating with the hollow portion is formed on the upper surface (expected surface) of the lower frame 23. The lower end of the smoke proof sheet 25 is inserted into the hollow portion of the lower frame 23 through the slit 50.

In the hollow portion of the lower frame 23, a tension applying device 60 for applying tension to the smoke proof sheet 25 is arranged. The tension applying device 60 includes a sandwiching member 61 fixed to the lower end portion of the smoke-proof sheet 25, an urging member 65 that urges the sandwiching member 61 downward inside the lower frame 23, and the sandwiching member 61 upward. And a screw 70 for pressing.

The sandwiching member 61 of the present embodiment includes a first fixing member 71 having a substantially U-shaped cross section and a second fixing member 72 having a plate shape. The first fixing member 71 and the second fixing member 72 sandwich the lower end of the smoke proof sheet 25 in the expected direction, so that the smoke proof sheet 25 is prevented from falling off the lower frame 23. A bent portion 74 that bends inward is formed at the end of the slit 50 of the present embodiment on the side of the first fixing member 71, and the tip of the bent portion 74 contacts the prospective surface of the first fixing member 71. ing. The sandwiching member 61 corresponds to the width of the smoke proof sheet 25, and is a long member that extends along the longitudinal direction of the lower frame 23 as a whole.

As shown in FIG. 4, the biasing member 65 of the present embodiment is a leaf spring. One end of the biasing member 65 on one side is fastened by a fastening member such as a screw (not shown). It is fixed to the upper surface of the member 61). In this embodiment, the biasing member 65 fixes the position of the biasing member 65 inside the lower frame 23 by fixing one side of the leaf spring, while the elastically deforming end portion of the other side is first. The biasing member 65 is allowed to deform by moving on the upper surface of the fixing member 71.

The upper portion of the biasing member 65 is in contact with the ceiling portion of the hollow portion of the lower frame 23, and the elastic force of the biasing member 65 presses the holding member 61 downward.

The screw 70 is fastened through a screw hole 66 formed in the bottom surface of the lower frame 23, and the tip end thereof is in contact with the lower surface of the first fixing member 71 (holding member 61). As shown in FIG. 1, two (a plurality of) biasing members 65 of the present embodiment are arranged at intervals in the longitudinal direction of the lower frame 23, and the screws 70 are also elongated in accordance with the position of the biasing member. Two pieces are arranged at intervals in the direction.

When the tip of the screw 70 is in contact with the first fixing member 71 (holding member 61), the urging member 65 is in a bent state (a length in the up-down direction is shorter) than in a natural state. .. The position of the screw 70 in this state is the pressing position. As shown in FIGS. 1 to 4, when the screw 70 is in the pressing position, the urging member 65 contracts more than the natural state and the holding member 61 is pushed up. In this state, the smoke-proof sheet 25 is not tensioned by the tension imparting device 60 or is weaker than the strength set to remove wrinkles and flexure. When the screw 70 moves to the retracted position where the support of the first fixing member 71 (holding member 61) is released, the downward tension by the tension applying device 60 is applied to the smoke proof sheet 25.

Next, a state in which tension is applied by the tension applying device 60 will be described. FIG. 5 is a diagram showing a state after tension is applied to the smoke proof sheet 25 in the smoke proof panel 1 of the present embodiment. FIG. 6 is a vertical cross-sectional view showing a state after applying tension to the smoke-proof sheet 25 in the smoke-proof panel 1 of the present embodiment, and is a cross-sectional view taken along the line B′-B′ of FIG. 5. FIG. 7 is a schematic diagram showing the tension applying device 60 after applying tension inside the lower frame 23 of the present embodiment. 5 to 7 show a state in which the screw 70 as the holding member is in the retracted position.

As shown in FIGS. 5 to 7, by removing the screw 70 from the lower frame 23 with a tool or the like, the support of the holding member 61 is released, and the elastic force of the biasing member 65 moves the holding member 61 downward. Move (see arrow in FIG. 7). With the downward movement of the sandwiching member 61, the lower end of the smoke-proof sheet 25 is pulled downward (see FIG. 1). By pulling the smokeproof sheet 25 downward, wrinkles and bending of the smokeproof sheet 25 are eliminated. The tension applied to the smoke proof sheet 25 by the tension applying device 60 can be mechanically and accurately set by the shapes of the biasing member 65, the sandwiching member 61, and the lower frame 23, so that the tension varies depending on the product. Is also prevented.

Next, a method for implementing the smokeproof panel 1 of the above embodiment will be described. FIG. 8: is a schematic diagram which showed the procedure of the assembling method of the smoke prevention panel 1 of this embodiment. A chain line arrow in FIG. 8 indicates a procedure. FIG. 9 is a vertical cross-sectional view of the smoke prevention sheet 25 of this embodiment. In the following description, the same or similar configurations as those of the above-described embodiment may be denoted by the same reference numerals even if they are not shown. For example, the second fixing member 72 of the holding member 61 shown in FIG. 9 is formed in a substantially L shape, but has the same function as the second fixing member 72 of the above-described embodiment formed in a plate shape, The same symbols are attached.

As shown in FIG. 8, the sandwiching member 61 is arranged at the lower end portion, the retaining members 31 are arranged on both left and right sides, and the smoke-proof sheet 25 is prepared. Two urging members 65 are fixed to the upper surface of the sandwiching member 61 of the smoke proof sheet 25 at intervals in the longitudinal direction. Then, as indicated by a chain line arrow with reference numeral 101, the lower frame 23 is covered so as to cover the entire region of the holding member 61 in the longitudinal direction. As described above, the slits 50 through which the smoke-proof sheet 25 can be inserted are formed in the lower frame 23, so that the sandwiching member 61 can be slid and inserted into the lower frame 23 while the smoke-proof sheet 25 is sandwiched. Is possible.

Next, as shown by the chain line 102, the screw 70 arranged in the screw hole 66 of the lower frame 23 is tightened. The biasing member 65 is located vertically above the screw 70. Subsequently, as shown by the chain line 103, the vertical frame 21 is slid from above on the left and right ends of the smoke-proof sheet 25. At this time, the retaining member 31 is slid so as to enter the inside of the vertical frame 21 while allowing the end portion of the smoke prevention sheet 25 to pass through the slit 35. The retaining member 31 is fixed to the smoke-proof sheet 25 in advance before the steps 101 to 103.

Next, as shown by the chain line 104, the upper end of the smoke-proof sheet 25 is pulled upward and held by the upper frame 22. More specifically, screws (not shown) are fastened with the upper frame body 41 and the upper frame sheet holding portion 42 sandwiching the upper end portion of the smoke proof sheet 25, so that both sides of the upper frame 22 are mechanically or bonded. , Is connected to the vertical frame 21 by appropriate means. As a result, the smoke proof sheet 25 is surrounded by the frame material on four sides. The corner portions of the frame material may be fastened with tapping holes or tapping screws. This state is the state of the smoke prevention panel 1 before applying tension shown in FIGS. The method of connecting the upper frame as the horizontal frame of the smoke barrier and the lower frame to the vertical frame may be so-called horizontal win or vertical win.

Then, as shown by the arrow of reference numeral 105, the screw 70 is removed to apply the tension by the tension applying device 60 to the smoke proof sheet 25. This state is the state of the smokeproof panel 1 after tensioning shown in FIGS. Thus, by finally removing the screw 70 and applying the urging force of the urging member 65, it is possible to apply downward tension to the smoke proof sheet 25.

According to the above-described embodiment, the following effects can be obtained.
The smoke proof panel 1 includes a flexible smoke proof sheet 25, an upper frame 22 for fixing the upper end of the smoke proof sheet 25, and a sandwiching member 61 as a fixing member for fixing the lower end of the smoke proof sheet 25. , A lower frame 23 in which a sandwiching member 61 sandwiching the smoke-proof sheet 25 is housed, a biasing member 65 that biases the sandwiching member 61 downward in the lower frame 23, and a biasing member 65 And a screw 70 as a holding member for temporarily holding the holding member 61 above.
Further, in the method for assembling the smoke prevention panel 1, the lower frame 23 having the lower end portion fixed by the sandwiching member 61 to the smoke prevention sheet 25 is provided with the urging member 65 for urging the sandwiching member 61 downward. Steps, a step of pressing the holding member 61 urged by the urging member 65 upward with a screw 70 as a holding member, an upper frame 22 is fixed to an upper end portion of the smoke proof sheet 25, and a vertical frame is provided to the left and right. In a state in which 21 is fixed, the step of releasing or weakening the pressing of the sandwiching member 61 and moving the screw 70 so that the tension of the urging member 65 is applied to the smoke-proof sheet 25.

This makes it possible to surely and easily apply an appropriate tension to the smoke-proof sheet 25, and the tension does not vary regardless of who assembles it, regardless of the skill level of the work. Since the assembling work of the smoke proof panel 1 becomes easy, the working time can be shortened. After the assembly, the pressing by the screw 70 is released and a proper tension is always applied, so that it is basically unnecessary to adjust the tension after the attachment. Even if the smokeproof sheet 25 expands or contracts due to aged deterioration or environmental changes, the smokeproof panel 1 can be easily assembled with a simple structure so that a constant tension can always be applied to the smokeproof sheet 25.

In addition, in the present embodiment, the screw 70 as the holding member releases or weakens the pressure on the holding member 61 from the pressing position where the holding member 61 urged by the urging member 65 is pressed upward, and the smoke-proof sheet 25. It is configured to be movable to a retracted position that applies tension by the biasing force of the biasing member 65.

As a result, the tension can be properly applied to the smoke-proof sheet 25 only by moving the screw 70 from the pressing position to the retracted position, and the assembling work can be surely performed.

Further, in the present embodiment, the screw hole 66 is formed at a position corresponding to the urging member 65 of the lower frame 23, and the screw 70 fastened to the screw hole 66 is inside the lower frame 23 at the pressing position. The holding member 61 is pushed upward, the fastening is loosened from the lower frame 23, and the holding member 61 moves to the retracted position.

This makes it possible to adjust the timing of applying the tension by the simple work of fastening and releasing the screw 70. Further, from the viewpoint of aesthetics, it is preferable to remove the screw 70 after applying the tension, but the strength of the tension applied to the smoke proof sheet 25 can be adjusted by adjusting the degree of loosening the screw 70. In the configuration according to the present embodiment, the amount of pulling the smoke proof sheet 25 becomes relatively small if the screw 70 is slightly loosened from the pressing position, and the screw 70 is completely removed from the lower frame 23. Then, the amount by which the smoke-proof sheet 25 is pulled becomes relatively large. With this, the degree of wrinkles and bending can be adjusted.

Further, in the present embodiment, the screw 70 is arranged below the biasing member 65 at the pressing position.

As a result, the pressing force of the screw 70 can be efficiently transmitted to the sandwiching member 61, the sandwiching member 61 can be accurately held at an appropriate upper position, and the smoke-proof sheet 25 is tensioned before tension is applied. Such situations can be reliably prevented, and assembly work can be performed more smoothly.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be modified as appropriate. In the following description of the modified examples of the above-described embodiment, the same or similar configurations as those of the above-described embodiment may be denoted by the same reference numerals and the description thereof may be omitted.

The configuration of the vertical frame 21 is not limited to the configuration of the above embodiment, and can be changed as appropriate. FIG. 10 is a cross-sectional view of the smoke prevention panel 1 of the first modified example. As shown in FIG. 10, in the smoke prevention panel 1 of the modified example, an urging member (leaf spring) 210 for urging the first fixing member 32 (holding member 61) outward in the left-right direction is provided inside the vertical frame 21. Will be placed. The biasing member 210 brings the smoke-proof sheet 25 into a state where tension can be applied even in the left-right direction. Even if there are installation locations, component tolerances, etc., the biasing member (leaf spring) 210 can apply appropriate tension to the smoke-proof sheet 25 in the left-right direction.

Further, the configuration of the vertical frame 21 and the retaining member 31 disposed inside the vertical frame 21 can be appropriately changed. FIG. 11 is a cross-sectional view of the smoke prevention panel 1 of the second modification. As shown in FIG. 11, the vertical frames 221 on both the left and right sides of the smoke prevention panel 201 of the second modified example have a hollow portion formed inside thereof, and a side surface (expected surface) has a slit 235 communicating with the hollow portion. To be done. The retaining member 231 disposed inside the vertical frame 221 includes a block-shaped first fixing member 232 and a plate-shaped second fixing member 233, and is protected by the first fixing member 232 and the second fixing member 233. The left and right ends of the smoke sheet 25 are sandwiched in the expected direction.

Further, in the above embodiment, a leaf spring excellent in space saving is used as the urging member 65, but the present invention is not limited to this configuration, and an elastic member having another shape having a restoring force may be applied. Can also Next, a third modified example using a biasing member having a configuration different from those of the above-described embodiment and modified example will be described.

FIG. 12 is a vertical cross-sectional view showing a state before tension is applied to the smoke proof sheet 25 in the smoke proof panel 301 of the third modified example. FIG. 13 is an enlarged vertical cross-sectional view showing a state before tension is applied by the tension applying device 360 of the third modified example. FIG. 14 is a schematic diagram showing a tension applying device 360 before applying tension inside the lower frame 23 of the third modified example. 12 to 14 show a state in which the screw 70 as the holding member is in the pressing position and the holding member 361 described later is pushed up.

As shown in FIG. 12, in the smoke proof panel 301 of the third modified example, the configuration of the tension applying device 360 arranged inside the lower frame 23 is different from that of the above-described embodiment.

As shown in FIGS. 13 and 14, the tension applying device 360 includes a holding member 361 fixed to the lower end portion of the smoke-proof sheet 25 and a biasing member for biasing the holding member 361 downward inside the lower frame 23. The member 365 and the screw 70 that pushes the holding member 61 upward are provided.

The sandwiching member 361 includes a first fixing member 371 having a substantially L-shaped cross section and a second fixing member 72 having a plate shape. The first fixing member 371 and the second fixing member 372 fix the smokeproof sheet 25 in a state where the lower end portion of the smokeproof sheet 25 is sandwiched in the expected direction. An accommodating portion 367 for accommodating the biasing member 365 is formed on the side of the first fixing member 371 opposite to the sandwiching surface of the smoke prevention sheet 25.

The urging member 365 is a so-called coil spring, and is arranged in the housing portion 367 of the first fixing member 371 with the axial direction facing the thickness direction (expected direction) of the smoke proof panel 301. A screw 366, which penetrates the first fixing member 371 and the second fixing member 372 in the projection direction, is fastened to the holding member 361. The tip of the screw 366 reaches the accommodating portion 367 of the first fixing member 371 from the second fixing member 372 side, and is in a state of being inserted through the inside of the biasing member 365. A plurality of biasing members 365 are arranged at intervals in the longitudinal direction (two biasing members 365 are shown in FIG. 14).

The urging member 365 has one end in contact with an inner wall forming the housing portion 367 of the first fixing member 371, and the other end (upper end) in the ceiling portion of the hollow portion of the lower frame 23. The holding member 361 is pressed downward by the elastic force of the biasing member 365.

Similar to the above-described embodiment, the tip of the screw 70 is in contact with the lower surface of the first fixing member 371 (the sandwiching member 361). Two screws 70 of the third modified example are also arranged at intervals in the longitudinal direction according to the position of the biasing member 365. The screw 70 functions as a holding member, and the holding member 361 is pushed up.

Next, a state where tension is applied by the tension applying device 360 will be described. FIG. 15 is a vertical cross-sectional view showing a state after tension is applied to the smoke proof sheet 25 in the smoke proof wall of the third modification. FIG. 16 is an enlarged vertical sectional view showing a state after tension is applied by the tension applying device 360 of the third modified example. FIG. 17 is a schematic diagram showing the tension applying device 360 after applying tension inside the lower frame 23 of the third modified example, and is a cross-sectional view taken along the line C′-C of FIG. 16.

As shown in FIGS. 15 to 17, the screw 70 as the holding member is removed from the lower frame 23 and moved to the retracted position, so that the pressing force on the holding member 361 is released. The sandwiching member 361 that has lost the support of the screw 70 moves downward due to the elastic force of the biasing member 365, and the smoke-proof sheet 25 is tensioned.

Also in the smoke-proof panel 301 of the third modified example described above, the smoke-proof panel 301 can be assembled by the same method as that of the above-described embodiment, and the same effect as that of the above-described embodiment can be obtained. Furthermore, the configurations of the above-described embodiments and modifications can be modified as follows.

Further, in each of the above-described embodiment and modification, the configuration is such that the holding member is pushed up from below with a screw, but the configuration of pushing up the holding member can be appropriately changed according to circumstances. For example, the holding member may be held upward by a screw fastened from the upper side of the lower frame, and the screw may be removed after construction to apply the biasing force to the biasing member.

Further, in the above embodiment, the screw 70 is described as an example of the holding member, but the structure of the holding member is not limited to this. For example, the smoke-proof panel is assembled while the sandwiching member (fixing member) is held at the pressing position by the wedge-shaped holding member, and finally the wedge-shaped holding member is moved to the retracted position where it is removed from the lower frame. Then, the tension of the biasing member may be applied to the smoke proof sheet. Further, as the holding member, a substantially elliptical shaft-shaped member having an eccentric cross section is arranged through the inside of the lower frame, and the ellipse of the shaft-shaped member is oriented vertically at the pressing position to push up the holding member, and at the retracted position. A configuration may be adopted in which the shaft member is rotated so that the ellipse faces sideways to release or loosen the pressing force of the sandwiching member. With this configuration, the shaft-shaped member as the holding member may be left inside the lower frame even after the construction work. In this way, the configuration for moving the fixing member that holds the lower end of the smoke proof sheet from the pressing position to the retracted position can be appropriately changed according to circumstances.

1,201,301 Smoke-proof panel 22 Upper frame 23 Lower frame 25 Smoke-proof sheet 61,361 Clamping member (fixing member)
65, 365 urging member 70 screw (holding member)

Claims (5)

A smoke proof panel used for a smoke proof wall,
A smokeproof sheet having flexibility,
An upper frame for fixing the upper end of the smoke-proof sheet,
A fixing member for fixing the lower end of the smoke-proof sheet,
A lower frame in which the fixing member fixing the smoke prevention sheet is housed,
A biasing member that biases the fixing member downward inside the lower frame;
A holding member for temporarily holding the fixing member biased by the biasing member above;
Smokeproof panel with. The smoke prevention panel according to claim 1, wherein the holding member is configured to be movable from a pressing position that presses the fixing member upward to a retracted position that releases or weakens the pressing. A screw hole is formed at a position corresponding to the urging member of the lower frame,
The holding member is fastened from the screw hole, pushes the fixing member upward inside the lower frame at the pressing position, and loosens the fastening from the lower frame at the retracted position to move to the retracted position. The smokeproof sag wall according to claim 2. The smoke retaining wall according to claim 2 or 3, wherein the holding member is disposed below the biasing member at the pressing position. A method of assembling a smoke proof panel used for a smoke proof wall,
A step of attaching a lower frame, in which a lower end portion is fixed by a fixing member, a biasing member for biasing the fixing member downward is provided inside the smoke-proof sheet,
Temporarily holding the fixing member urged by the urging member above by a holding member,
A method of assembling a smoke-proof panel, comprising the step of releasing temporary holding of the fixing member by the holding member with at least the upper frame fixed to the upper end portion of the smoke-proof sheet.

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