Shutter unit

Abstract

The shutter unit is designed to have a flat, smooth top surface with minimal irregularities on the lower frame, while also preventing the spread of fire in the event of an outbreak. [Solution] The shutter unit 1 comprises a shutter body 20 and a lower frame 3. The shutter body has a first insertion portion 22a provided at its lower end and a second insertion portion 22b located on the indoor side of the first insertion portion 22a and parallel to the first insertion portion. The lower frame comprises a lower frame body 30 provided on the outdoor side of the window opening and a mounting portion 31 to which the lower frame body is attached. The lower frame body has a groove 30c into which the lower end of the shutter body is inserted and a fitting portion 34 that is detachably fitted to the mounting portion. The groove has a first groove 33a into which the first insertion portion is inserted and a second groove 33b provided adjacent to the indoor side of the first groove and into which the second insertion portion is inserted. The mounting portion has a fitting portion 31a into which the fitting portion of the lower frame body is detachably fitted.

Description

Technical Field

[0001] The present invention relates to a shutter unit.

Background Art

[0002] Conventionally, a shutter having a lower frame with a flat upper surface is known. Such a shutter is configured to close the shutter by abutting the lower end of the shutter body against the flat lower frame.

[0003] On the other hand, a shutter has been proposed in which a receiving groove is provided only in a part of the longitudinal direction of the lower frame, thereby preventing rattling when the shutter body is closed and enabling the upper surface of the lower frame to be substantially flat (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventionally, a fire shutter for preventing the spread of fire is known. In a conventional fire shutter applied to a building such as a house, a member covering the front side of the lower frame is provided at the lower end of the shutter, and the upper surface of the lower frame cannot be formed flat.

[0006] On the other hand, the shutter described in Patent Document 1 has a configuration in which a receiving groove is provided only in a part of the longitudinal direction of the lower frame, and a locking piece inserted into this receiving groove is projected from the lower end of the shutter body. Therefore, the shutter described in Patent Document 1 can form the upper surface of the lower frame substantially flat, but cannot function as a fire shutter.

[0007] This invention was made to solve these problems, and aims to provide a shutter unit that functions as a fire-resistant shutter to prevent the spread of fire in the event of a fire, while having a flat shape with minimal irregularities on the upper surface of the lower frame body. [Means for solving the problem]

[0008] The invention described in claim 1 is, for example, as shown in Figure 1, in a shutter unit 1, The shutter body 20 and A shutter rail 24 that guides the raising and lowering of the shutter body 20, It is equipped with a lower frame 3 for the shutter rail 24, The lower frame 3 comprises a lower frame body 30 provided on the outdoor side of the window opening and a mounting portion 31 to which the lower frame body 30 is attached. The lower frame body 30 is The lower end of the shutter body 20 is inserted into the groove 30c, It comprises a fitting portion 34 that is detachably fitted to the mounting portion 31, The shutter body 20 is A first insertion portion 22a is provided at the lower end, It comprises a second insertion portion 22b, which is located on the indoor side of the first insertion portion 22a and provided at the lower end, and which is arranged parallel to the first insertion portion 22a, The groove 30c comprises a first groove 33a into which the first insertion portion 22a is inserted, and a second groove 33b provided adjacent to the indoor side of the first groove 33a into which the second insertion portion 22b is inserted. The mounting portion 31 is characterized by having a fitting portion 31a into which the fitting portion 34 of the lower frame body 30 is detachably fitted.

[0009] According to the invention described in claim 1, when the shutter body 20 is closed, the first insertion portion 22a of the shutter body 20 is inserted into the first groove portion 33a of the lower frame body 30, and the second insertion portion 22b of the shutter body 20 is inserted into the second groove portion 33b of the lower frame body 30, so that the lower end of the shutter body 20 is recessed below the upper surface of the lower frame body 30. As a result, even if a fire occurs around or inside the building, the intrusion of flames from outside to inside, or from inside to outside, can be sufficiently suppressed.

[0010] Furthermore, the detachable fitting between the fitting portion 34 of the lower frame body 30 and the fitting portion 31a of the mounting portion 31 allows the lower frame body 30 to be attached to and detached from the mounting portion 31 without the need to operate fastening members such as screws. This makes it easy to replace the lower frame body 30, improving maintainability and allowing the shutter unit 1 to be used for a long period of time while replacing the lower frame body 30.

[0011] The invention described in claim 2 is, for example, as shown in Figure 1, in the shutter unit 1 described in claim 1, The lower frame body 30 is The upper surface is formed flat and the first flat portion 30a is located on the outdoor side, The upper surface is formed flat and is located on the indoor side, and comprises a first flat section 30a and a second flat section 30b which are arranged on approximately the same plane, and the upper surfaces of the first flat section 30a and the second flat section 30b are arranged at approximately the same height as the upper surface of the sash lower frame 101 attached to the window opening. The groove 30c is formed between the first flat portion 30a and the second flat portion 30b.

[0012] According to the invention described in claim 2, a first flat portion 30a is positioned on the outdoor side and a second flat portion 30b is positioned on the indoor side with respect to the groove portion 30c into which the lower end of the shutter body 20 is inserted. The first flat portion 30a and the second flat portion 30b are positioned on substantially the same plane, and their respective upper surfaces are positioned at approximately the same height as the upper surface of the sash lower frame 101. This reduces unevenness at the base that would obstruct people from entering and exiting, especially when applied to windows where people enter and exit. Furthermore, the appearance is improved because the unevenness is not noticeable.

[0013] Furthermore, when the shutter body 20 is closed, the first insertion portion 22a of the shutter body 20 is inserted into the first groove portion 33a of the lower frame body 30, and the second insertion portion 22b of the shutter body 20 is inserted into the second groove portion 33b of the lower frame body 30, so that the lower end of the shutter body 20 is recessed below the first flat portion 30a and the second flat portion 30b, and the first flat portion 30a protrudes by a predetermined amount on the outdoor side of the shutter body 20. As a result, even if a fire occurs around or inside the building, the intrusion of flames from the outside to the inside, or from the inside to the outside, can be sufficiently suppressed.

[0014] The invention described in claim 3 is, for example, as shown in Figure 1, in the shutter unit 1 described in claim 2, The depth of the second groove 33b is set to be shallower than the depth of the first groove 33a. The lower end of the second insertion portion 22b is positioned above the lower end of the first insertion portion 22a, in accordance with the depth of the second groove portion 33b.

[0015] According to the invention described in claim 3, the lengths of the first insertion portion 22a and the second insertion portion 22b, and the depths of the first groove portion 33a and the second groove portion 33b can be set to a shape suitable for sufficiently suppressing the intrusion of flames.

[0016] The invention described in claim 4 is, for example, as shown in Figure 1, in the shutter unit 1 described in claim 3, The first insertion portion 22a is characterized by having a heat-blasting agent 23 on its indoor side surface.

[0017] According to the invention described in claim 4, in case of a fire, the heat-expandable agent 23 can be expanded and filled on the indoor side surface of the first insertion part 22a.

[0018] The invention described in claim 5 is, for example, as shown in FIG. 1, in the shutter unit 1 described in claim 4, The groove part 30c is further provided with a wall part 33c that partitions the first groove part 33a and the second groove part 33b, and is characterized by this.

[0019] According to the invention described in claim 5, in case of a fire, a space to be filled with the foamed heat-expandable agent 23 can be secured.

[0020] The invention described in claim 6 is, for example, as shown in FIG. 1, in the shutter unit 1 described in claim 4, The shutter body 20 further includes a connecting plate part 22c that connects the upper ends of the first insertion part 22a and the second insertion part 22b and is integrally formed with the first insertion part 22a and the second insertion part 22b, The connecting plate part 22c is arranged horizontally, and when the first insertion part 22a is inserted into the first groove part 33a and the second insertion part 22b is inserted into the second groove part 33b, it is arranged at substantially the same height as the upper surface of the second flat part 30b, and is characterized by this.

[0021] According to the invention described in claim 6, in case of a fire, while suppressing the foamed heat-expandable agent 23 from overflowing onto the upper surface of the second flat part 30b on the indoor side surface of the first insertion part 22a, a space to be filled with the heat-expandable agent 23 can be secured. Further, when the shutter body 20 closed from the indoor side is viewed, the unevenness between the upper surface of the second flat part 30b and the connecting plate part 22c becomes less noticeable.

[0022] The invention described in claim 7 is, for example, as shown in FIG. 1, in the shutter unit 1 described in claim 2, The lower frame 3 further includes a support part 32 that supports the attachment part 31 and is fixed to the housing 201, The mounting portion 31 is attached to the front end of the support portion 32, the fitting portion 34 of the lower frame body 30 is fitted into the fitting portion 31a of the mounting portion 31, the lower frame body 30 is attached to the upper surface of the mounting portion 31, and the sash lower frame 101 is positioned above the support portion 32.

[0023] According to the invention described in claim 7, the lower frame body 30 is attached to the building structure 201 via the mounting portion 31 and the support portion 32, so that the first flat portion 30a and the second flat portion 30b are positioned at approximately the same height as the upper surfaces of each other, and the upper surfaces of the first flat portion 30a and the second flat portion 30b are positioned at approximately the same height as the upper surface of the sash lower frame 101 attached to the window opening 200. [Effects of the Invention]

[0024] According to the present invention, the lower frame body can be detachably attached to the mounting portion 31 to improve maintainability, and a shutter unit can be provided that functions as a fire-resistant shutter to prevent the spread of fire in the event of a fire. [Brief explanation of the drawing]

[0025] [Figure 1] This is a cross-sectional view of a main part showing an example of the shutter unit of this embodiment. [Figure 2] This is an overall side cross-sectional view showing an example of the shutter unit of this embodiment. [Figure 3] This is a perspective view of the main parts of an example of the shutter unit of this embodiment. [Modes for carrying out the invention]

[0026] Embodiments of the shutter unit of the present invention will be described below with reference to the drawings. The features and technical effects of the embodiments will be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. The scope of the present invention is not limited to the examples shown in the drawings, as the drawings are provided for illustrative purposes only.

[0027] <Example of shutter unit configuration> Figure 1 is a side cross-sectional view showing an example of the shutter unit of this embodiment, Figure 2 is an overall side cross-sectional view showing an example of the shutter unit of this embodiment, and Figure 3 is a perspective view showing an example of the shutter unit of this embodiment.

[0028] The shutter unit 1 comprises a shutter 2 and a lower frame 3. The shutter 2 comprises a shutter body 20, a shutter drive unit 21 for raising and lowering the shutter body 20, and a pair of shutter rails 24 for guiding the raising and lowering of the shutter body 20.

[0029] The shutter body 20 is guided by the shutter rail 24 on both the left and right sides in the width direction. The shutter body 20 also includes a first insertion section 22a and a second insertion section 22b.

[0030] The first insertion portion 22a is provided at the lower end of the shutter body 20, which extends in the vertical direction. The first insertion portion 22a extends in the width direction of the shutter body 20 in a form that is substantially flush with the shutter body 20.

[0031] The second insertion portion 22b is located on the indoor side of the first insertion portion 22a and is provided at the lower end of the shutter body 20. The second insertion portion 22b extends in the width direction of the shutter body 20, parallel to the first insertion portion 22a, with a predetermined distance between them.

[0032] The lower end of the first insertion portion 22a protrudes below the lower end of the second insertion portion 22b. That is, the lower end of the second insertion portion 22b is located above the lower end of the first insertion portion 22a.

[0033] The shutter body 20 includes a connecting plate portion 22c. The connecting plate portion 22c is positioned horizontally and connects the upper ends of the first insertion portion 22a and the second insertion portion 22b on the indoor side of the shutter body 20, and is integrally formed with the first insertion portion 22a and the second insertion portion 22b.

[0034] Furthermore, the shutter body 20 is equipped with a heat-blasting agent 23 on the indoor side of the first insertion portion 22a.

[0035] The lower frame 3 comprises a lower frame body 30, a mounting portion 31 to which the lower frame body 30 is attached, and a support portion 32 that supports the mounting portion 31.

[0036] The lower frame body 30 includes a first flat portion 30a whose upper surface is formed flat, and a second flat portion 30b whose upper surface is formed flat, similar to the first flat portion 30a. The lower frame body 30 also includes a groove portion 30c formed between the first flat portion 30a and the second flat portion 30b.

[0037] The first flat section 30a and the second flat section 30b are aligned in the depth direction of the lower frame body 30 with a groove section 30c in between, and each extends in the width direction of the lower frame body 30. Furthermore, the upper surfaces of the first flat section 30a and the second flat section 30b are positioned on approximately the same plane. In addition, the upper surfaces of the first flat section 30a and the second flat section 30b are formed with irregularities such as a flat pattern or a crisscross pattern by, for example, knurling.

[0038] The groove portion 30c comprises a first groove portion 33a into which the first insertion portion 22a of the shutter body 20 is inserted, a second groove portion 33b into which the second insertion portion 22b of the shutter body 20 is inserted, and a wall portion 33c that separates the first groove portion 33a and the second groove portion 33b.

[0039] The first groove 33a is provided adjacent to the indoor side of the first flat section 30a. The first groove 33a is concave relative to the first flat section 30a and the second flat section 30b, and the groove, into which the first insertion section 22a can be inserted, extends in the width direction of the lower frame body 30.

[0040] The second groove 33b is located adjacent to the indoor side of the first groove 33a and adjacent to the outdoor side of the second flat section 30b. The second groove 33b is concave relative to the first flat section 30a and the second flat section 30b, and the groove, into which the second insertion section 22b can be inserted, extends in the width direction of the lower frame body 30.

[0041] The first groove 33a is made deeper than the second groove 33b, in accordance with the amount of downward protrusion of the first insertion portion 22a relative to the second insertion portion 22b. In other words, the depth of the second groove 33b is set to be shallower than the depth of the first groove 33a.

[0042] The wall portion 33c protrudes upward from the bottom surface of the first groove portion 33a and the bottom surface of the second groove portion 33b. The upper end of the wall portion 33c is located below the plane connecting the first flat portion 30a and the second flat portion 30b. When the first insertion portion 22a is inserted into the first groove portion 33a, the outdoor side of the wall portion 33c faces the indoor side of the first insertion portion 22a.

[0043] The lower frame body 30 is equipped with a fitting portion 34 that is detachably fitted into the mounting portion 31. The fitting portion 34 is provided at the end on the first flat portion 30a side and the end on the second flat portion 30b side.

[0044] The shutter unit 1 is installed on the exterior side of the window sash 100. The window sash 100 has a sash bottom frame 101 attached to a window opening 200 of a building (not shown). The shutter unit 1 also has a bottom frame 3 attached to the exterior side of the sash bottom frame 101.

[0045] The mounting portion 31 includes a fitting portion 31a that is detachably fitted into the fitting portion 34 of the lower frame body 30. The fitting portion 34 and the fitting portion 31a are detachably fitted together, for example, by fitting a convex portion and a concave portion.

[0046] The lower frame 3 is attached to the building frame 201 (not shown) by screws 202 at the support portion 32, the mounting portion 31 is attached to the support portion 32 by screws 203, and the fitting portion 34 of the lower frame body 30 is fitted into the fitting portion 31a of the mounting portion 31, thereby attaching the lower frame body 30 to the mounting portion 31. The lower frame 3 has the mounting portion 31 attached to the front end of the support portion 32, and the lower frame body 30 is attached to the upper surface of the mounting portion 31. The sash lower frame 101 is then positioned above the support portion 32.

[0047] In this way, when the lower frame body 30 is attached to the building structure 201 via the mounting portion 31 and the support portion 32, the first flat portion 30a is located on the outdoor side relative to the groove portion 30c. The second flat portion 30b is located on the indoor side relative to the groove portion 30c.

[0048] As a result, the lower frame body 30 has the first flat section 30a located on the outdoor side, and the second flat section 30b located on the indoor side of the first flat section 30a.

[0049] Furthermore, the first flat section 30a and the second flat section 30b are positioned so that their upper surfaces are at approximately the same height.

[0050] The lower frame body 30 is positioned so that the upper surfaces of the first flat section 30a and the second flat section 30b are at approximately the same height as the upper surface of the sash lower frame 101 attached to the window opening 200.

[0051] Furthermore, when the shutter body 20 descends to a position where the lower end of the first insertion portion 22a of the shutter body 20 is in contact with the bottom surface of the first groove portion 33a, the connecting plate portion 22c is positioned at approximately the same height as the upper surface of the second flat portion 30b. This is achieved when the first insertion portion 22a of the shutter body 20 is inserted into the first groove portion 33a and the second insertion portion 22b is inserted into the second groove portion 33b, and the shutter body 20 is lowered to a position where the lower end of the first insertion portion 22a is in contact with the bottom surface of the first groove portion 33a.

[0052] <Example of shutter unit operation> When the shutter body 20 rises and opens due to the drive of the shutter drive unit 21, the lower frame body 30 is exposed on the outdoor side of the lower sash frame 101.

[0053] The lower frame body 30 has a first flat section 30a and a second flat section 30b, with their upper surfaces positioned at approximately the same height. Furthermore, the upper surfaces of the first flat section 30a and the second flat section 30b are positioned at approximately the same height as the upper surface of the sash lower frame 101. This reduces unevenness at the base of the window that could obstruct entry and exit, especially when applied to windows used by people. Additionally, the reduced visibility of unevenness improves the overall appearance. As shown by the dashed line in Figure 2, when a deck D is placed on the outdoor side of the lower frame body 30, positioning the upper surface of the deck D and the upper surface of the first flat section 30a at approximately the same height allows the upper surface of the deck D, the upper surface of the first flat section 30a, and the upper surface of the second flat section 30b to be positioned at approximately the same height as the upper surface of the sash lower frame 101. This reduces unevenness at the base of the window that could obstruct entry and exit, even when a deck D is provided. Furthermore, the reduced visibility of unevenness improves the overall appearance.

[0054] On the other hand, if the entire upper surface of the lower frame body of the shutter unit is flat, even when the shutter body is closed, it is not possible to adequately prevent flames from entering the building from the outside or from the inside from the outside.

[0055] In contrast, when the shutter body 20 is driven down and closed by the shutter drive unit 21, the first insertion portion 22a of the shutter body 20 is inserted into the first groove portion 33a of the lower frame body 30, and the second insertion portion 22b of the shutter body 20 is inserted into the second groove portion 33b of the lower frame body 30.

[0056] Thus, the shutter body 20 is configured such that the first insertion portion 22a and the second insertion portion 22b are positioned below the first flat portion 30a and the second flat portion 30b, and the first insertion portion 22a is positioned within the first groove portion 33a, with the first flat portion 30a protruding by a predetermined amount from the outside of the shutter body 20. This ensures that even if a fire breaks out around or inside a building, the intrusion of flames from outside to inside, or from inside to outside, can be sufficiently suppressed.

[0057] Furthermore, the depth of the second groove 33b is set to be shallower than the depth of the first groove 33a, and the lower end of the second insertion portion 22b is positioned above the lower end of the first insertion portion 22a to match the depth of the second groove 33b. As a result, the first groove 33a is configured to be deeper than the second groove 33b to match the amount of downward protrusion of the first insertion portion 22a relative to the second insertion portion 22b. A wall portion 33c is provided to separate the first groove 33a and the second groove 33b, and a heat-blasting agent 23 is provided on the indoor side surface of the first insertion portion 22a opposite the wall portion 33c. In the event of a fire, the heat-blasting agent 23 will foam and fill the first groove 33a between the indoor side surface of the first insertion portion 22a and the wall portion 33c.

[0058] In this way, a space can be secured on the indoor side surface of the first insertion section 22a for the foamed heat-blown agent 23 to be filled. Furthermore, the connecting plate section 22c can prevent the foamed heat-blown agent 23 from overflowing onto the upper surface of the second flat section 30b on the indoor side surface of the first insertion section 22a.

[0059] As a result, the shutter unit 1 can be shaped so that the length of the first insertion portion 22a and the second insertion portion 22b, and the depth of the first groove portion 33a and the second groove portion 33b are suitable for sufficiently suppressing the intrusion of flames, while the upper surface of the lower frame body 30 has a flat shape with few irregularities, and functions as a fire-resistant shutter that prevents the spread of fires occurring around or inside a building.

[0060] Furthermore, the shutter body 20 is designed so that the first insertion portion 22a and the second insertion portion 22b are recessed below the first flat portion 30a and the second flat portion 30b, thereby suppressing the leakage of outdoor light into the room when the shutter body 20 is closed. It also suppresses the leakage of indoor light into the room. In addition, when viewing the closed shutter body 20 from the indoor side, the unevenness between the upper surface of the second flat portion 30b and the connecting plate portion 22c can be made less noticeable.

[0061] Furthermore, the detachable fitting between the fitting portion 34 of the lower frame body 30 and the fitting portion 31a of the mounting portion 31 allows the lower frame body 30 to be attached to and detached from the mounting portion 31 without the need to operate fastening members such as screws. This makes it easy to replace the lower frame body 30, improving maintainability and allowing the shutter unit 1 to be used for a long period of time while replacing the lower frame body 30.

[0062] Furthermore, since the fitting portion 34 is provided at the end of the lower frame body 30 on the first flat portion 30a side and the end on the second flat portion 30b side, when the fitting portion 34 is fitted into the fitting portion 31a of the mounting portion 31, it is possible to prevent the lower frame body 30 from unintentionally coming off the mounting portion 31.

[0063] Furthermore, by functioning as a fire-resistant shutter that prevents the spread of fires occurring around or inside buildings, shutter unit 1 can contribute to achieving the Sustainable Development Goals (SDGs) by contributing to the creation of livable cities. [Explanation of Symbols]

[0064] 1...Shutter unit, 2...Shutter, 20...Shutter body, 21...Shutter drive unit, 22a...First insertion part, 22b...Second insertion part, 22c...Connecting plate part, 23...Heating foaming agent, 24...Shutter rail, 3...Lower frame, 30...Lower frame body, 30a...First flat part, 30b...Second flat part, 30c...Groove part, 31...Mounting part, 31a...Fitting part, 32...Support part, 33a...First groove part, 33b...Second groove part, 33c...Wall part, 34...Fitting part

Claims

1. The shutter body and A shutter rail that guides the raising and lowering of the shutter body, The shutter rail is provided with a lower frame, The lower frame comprises a lower frame body provided on the outdoor side of the window opening and a mounting portion to which the lower frame body is attached. The aforementioned lower frame body is The lower end of the shutter body is inserted into a groove, It comprises a fitting portion that is detachably fitted to the mounting portion, The shutter body is The first insertion portion provided at the lower end, It comprises a second insertion portion located on the lower end side of the first insertion portion and positioned parallel to the first insertion portion, The groove comprises a first groove into which the first insertion portion is inserted, and a second groove provided adjacent to the indoor side of the first groove into which the second insertion portion is inserted. The mounting portion includes a fitting portion into which the fitting portion of the lower frame body is detachably fitted. Shutter unit.

2. The aforementioned lower frame body is The upper surface is formed flat and the first flat section is located on the outdoor side, It comprises a second flat portion, the upper surface of which is formed flat and located on the indoor side, and which is positioned substantially flush with the first flat portion, and the upper surfaces of the first flat portion and the second flat portion are positioned at substantially the same height as the upper surface of the lower frame of the sash attached to the window opening. The groove is formed between the first flat portion and the second flat portion. The shutter unit according to claim 1.

3. The depth of the second groove is set to be shallower than the depth of the first groove. The lower end of the second insertion portion is positioned above the lower end of the first insertion portion, in accordance with the depth of the second groove. The shutter unit according to claim 2.

4. The indoor side surface of the first insertion portion is provided with a heat-blasting agent. The shutter unit according to claim 3.

5. The groove portion further comprises a wall portion that separates the first groove portion and the second groove portion. The shutter unit according to claim 4.

6. The shutter body further comprises a connecting plate portion that connects the first insertion portion and the upper end of the second insertion portion, and is integrally formed with the first insertion portion and the second insertion portion. The connecting plate portion is positioned horizontally, and when the first insertion portion is inserted into the first groove and the second insertion portion is inserted into the second groove, it is positioned at approximately the same height as the upper surface of the second flat portion. The shutter unit according to claim 4.

7. The aforementioned lower frame is, The mounting portion is further supported by a support portion which is fixed to the building structure, The mounting portion is attached to the front end of the support portion, the fitting portion of the lower frame body is fitted into the fitting portion of the mounting portion, the lower frame body is attached to the upper surface of the mounting portion, and the sash lower frame is positioned above the support portion. The shutter unit according to claim 2.

Images