Shutter device

Abstract

To improve maintainability by suppressing falling of a closing member when attaching / detaching the closing member.SOLUTION: A shutter device 100 is guided by right and left guide rails provided at both ends in the width direction of an opening 2 of a building, and is provided with a shutter curtain 10 capable of opening and closing the opening 2 so as to connect the upper ends of the right and left guide rails to each other, and can wind and store the shutter curtain 10. This shutter has a shutter case 18 provided with an inspection port 26 capable of inspecting the inside, a front face plate 20 (a closing member) capable of closing the inspection port 26 and detachable to a peripheral edge part 28 of the inspection port 26, and a locking member 40 arranged in a lower part of the front face plate 20 and lockable to a lower edge 28D of the peripheral edge part 28.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a shutter device in a shutter device. [Background technology]

[0002] In a shutter case for rolling up and storing a shutter curtain, a structure is disclosed in which a front case plate (closing member) is removably attached to the opening on the front of the case section using screws to cover (close) it (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-108985 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of a sheet shutter device, maintenance is frequently required, and the closing member is frequently attached and detached. The opening in the above-mentioned conventional example can be used as an inspection hatch by loosening the screws and removing the closing member. Multiple screw fastening points are provided on the upper and lower edges of the closing member.

[0005] However, for example, if the screw on the upper edge is removed while the screw on the lower edge is loosened to a certain extent, the lower edge will be supported by the screw but the upper edge will no longer be restrained, which may cause the blocking member to fall forward (towards the operator).

[0006] The present invention aims to prevent the blocking member from falling over when it is attached or detached, and to improve maintainability. [Means for solving the problem]

[0007] The shutter device of the first aspect comprises a shutter curtain that is guided by left and right guide rails provided at both widthwise ends of an opening in a building and can open and close the opening; a shutter case that connects the upper ends of the left and right guide rails and allows the shutter curtain to be rolled up and stored, and is provided with an inspection hatch that allows the interior to be inspected; a blocking member that can block the inspection hatch and is attachable and detachable to the peripheral edge of the inspection hatch; and a locking member that is provided at the bottom of the blocking member and can be engaged with the lower edge of the peripheral edge.

[0008] In this shutter device, the inspection hatch can be closed with a closing member. The closing member is detachable from the periphery of the inspection hatch. A locking member is provided at the bottom of the closing member, which can be locked to the lower edge of the periphery of the inspection hatch. Therefore, even if the locking member is loosened from the periphery of the inspection hatch, the closing member is prevented from falling outside the inspection hatch.

[0009] In a second aspect, in the shutter device according to the first aspect, the blocking member is configured to overlap the outside of the lower edge and the locking member is configured to overlap the inside of the lower edge when the blocking member is attached.

[0010] In this shutter device, the blocking member and the locking member overlap on the outside and inside of the lower edge of the periphery of the inspection hatch, so that when the blocking member tries to fall outside the inspection hatch, the blocking member and the locking member get caught on the lower edge, preventing the blocking member from coming off the lower edge.

[0011] In a third aspect, in the shutter device according to the first aspect, the lower end of the locking member protrudes downward further than the lower end of the closing member at the attachment position of the locking member.

[0012] In this shutter device, the lower end of the locking member protrudes downward beyond the lower end of the closure member at the installation position of the locking member, allowing the worker to visually check the locking member and easily insert the locking member into the inner side of the lower edge of the periphery of the inspection hatch when installing the closure member. This improves workability.

[0013] In a fourth aspect, in a shutter device according to any one of the first to third aspects, the inspection hatch is provided in a recess recessed from the front of the shutter case, and the blocking member is attachable and detachable within the recess.

[0014] In this shutter device, in a structure in which the inspection hatch is provided in a recess in the shutter case, the collapse of the blocking member can be prevented.

[0015] In a fifth aspect, in the shutter device according to any one of the first to third aspects, the inspection hatch is provided on a front surface of the shutter case, and the blocking member is detachable from the front surface.

[0016] In this shutter device, in a structure in which the inspection hatch is provided on the front side of the shutter case, the collapse of the blocking member can be prevented.

[0017] In a sixth aspect, in the shutter device according to the first aspect, a plurality of the locking members are provided.

[0018] In this shutter device, multiple locking members are provided, which allows the closure member to be temporarily placed on the periphery of the inspection hatch more stably.

[0019] In a seventh aspect, in the shutter device according to the first aspect, the locking member is provided with an elongated hole.

[0020] In this shutter device, the locking member has a long slot that runs vertically, and when the blocking member is fixed to the peripheral edge of the inspection hatch with a screw, the screw can be passed through the slot. When the screw is passed through the slot, if the screw is loosened to a certain extent while threaded into the peripheral edge, even if the blocking member falls, it will not immediately interfere with the screw, so the blocking member can be allowed to fall a certain amount. [Effects of the Invention]

[0021] According to the present invention, it is possible to prevent the blocking member from falling over when it is attached or detached, thereby improving maintainability. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view showing a shutter device according to a first embodiment. [Figure 2] 1A is a cross-sectional view showing a state in which the closing member is attached to the case portion with a screw, and FIG. 1B is a cross-sectional view showing a state in which the screw has been removed from the state shown in FIG. [Figure 3] 1A is a perspective view of the closing member as seen from the front side, and FIG. 1B is a perspective view of the closing member as seen from the back side. [Figure 4] 1A is a cross-sectional view showing an example in which a clip is attached to a closure member by a rivet, and FIG. 1B is a cross-sectional view showing an example in which a clip is attached to a closure member by welding. [Figure 5] FIG. [Figure 6] 10A is a cross-sectional view showing a state in which the closing member is attached to the case part with a screw in the shutter device according to the second embodiment, and FIG. 10B is a cross-sectional view showing a state in which the screw has been removed from the state shown in FIG. [Figure 7] 1A is a perspective view of the closing member as seen from the front side, and FIG. 1B is a perspective view of the closing member as seen from the back side. [Figure 8] FIG. 10 is a perspective view showing a state in which the screws for fixing the closing member are removed in the shutter device according to the second embodiment. [Figure 9] FIG. 10 is a rear view showing the closing member; [Figure 10] 1A is a cross-sectional view showing a state in which a closing member is attached to a case portion with a screw in a shutter device according to a reference example, and FIG. 1B is a cross-sectional view showing a state in which the screw has been removed from the state shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in the various drawings are the same components. Note that duplicated descriptions and reference numerals may be omitted in the following embodiments.

[0024] Note that arrow H shown in the figure indicates the up-down direction (vertical direction) of shutter device 100, arrow W indicates the width direction (horizontal direction) of shutter device 100, and arrow L indicates the depth direction (horizontal direction) of shutter device 100. The direction indicated by arrow W in FIG. 1 will be described as the right side of shutter device 100, and the direction opposite to the direction indicated by arrow W will be described as the left side of shutter device 100. Also, the direction indicated by arrow L in FIG. 1 will be described as the rear side (back side) of shutter device 100, and the direction opposite to the direction indicated by arrow L will be described as the front side (front surface side) of shutter device 100.

[0025] Furthermore, the left-right direction of the shutter device 100 may be referred to as the "width direction," and the front-to-rear direction of the shutter device 100 may be referred to as the "shutter depth direction." Note that the above-mentioned left, right, front, and rear are directions defined for the convenience of explanation, and the configuration of the shutter device 100 is not limited to these directions.

[0026] [First embodiment] 1 and 2, the shutter device 100 according to this embodiment includes a shutter curtain 10, a shutter case 18, a front plate 20 as an example of a blocking member, and a locking member 40. Although not shown, the shutter device 100 includes a take-up roll, a drive roll, and the like as a drive unit within the shutter case 18.

[0027] (Shutter curtain) The shutter curtain 10 is guided by left and right guide rails (not shown) provided at both ends of the width of the opening 2 of the building, and is able to open and close the opening 2. The guide rails are provided inside the side frames 22. The shutter curtain 10 has a width extending between the left and right guide rails (side frames 22), and can be wound up into and unwound from the shutter case 18 by a drive roll serving as a drive unit. The shutter curtain 10 may be provided with a transparent window (not shown). A buffer section 24 is provided at the lower end of the shutter curtain 10 along the width direction.

[0028] The shutter device 100 is basically symmetrical in front view with respect to the center line CL in the width direction (hereinafter referred to as "width direction"). The "width direction" also corresponds to the width direction of the opening 2. When the shutter device 100 is a sheet shutter device using a sheet-like shutter curtain 10, the opening 2 is, for example, an entrance to a room such as a freezer, refrigerator, or warehouse. Hereinafter, closing the opening 2 may be referred to as "closing," and opening the opening 2 may be referred to as "opening."

[0029] The shutter device 100 may be applied to entrances and window openings of a building, and can be applied to an opening 2 that is opened and closed. The opening 2 to which the shutter device 100 is applied is specifically an opening that is formed in the side wall of a structure or the like and opens in the lateral direction (side).

[0030] (Frame 12) The frame 12 comprises a pair of side frames 22 and a shutter case 18. The pair of side frames 22 each extend in the vertical direction (hereinafter referred to as the "vertical direction") of the shutter device 100, and are arranged on both sides of an opening 2 such as a loading entrance in the width direction, at both ends of the shutter curtain 10 in the width direction. The "vertical direction" also corresponds to the height direction of the opening 2 and the height direction of the shutter curtain 10 when the opening 2 is closed.

[0031] The cross section of the side frame 22 taken in a direction perpendicular to its longitudinal direction is U-shaped with an opening on the inner side in the shutter width direction (i.e., the side closer to the center line CL in the width direction of the shutter device 100).

[0032] Furthermore, guide rails (not shown) extending in the vertical direction are arranged inside each of the pair of side frames 22. The pair of guide rails guide the shutter curtain 10 in the vertical direction so that the shutter curtain 10 moves in the vertical direction. A cross section of the guide rail 14 cut in a direction perpendicular to its longitudinal direction is generally U-shaped with an opening on the inside in the width direction. The inside in the width direction is the side closer to the center line CL in the width direction of the shutter device 100 in FIG. 1. The guide rail 14 and the side frames 22 also have upper ends that open upward. A guide block (not shown), for example, provided on the shutter curtain 10 is supported inside the guide rail 14 so as to be movable in the vertical direction.

[0033] (shutter case) As shown in Figure 1, the shutter case 18 is arranged to extend in the width direction so as to connect the upper ends of the left and right guide rails (side frames 22). The shutter case 18 is capable of rolling up and storing the shutter curtain 10, and is formed, for example, in the shape of a hollow box. The shutter case 18 is provided with an inspection hatch 26 that allows inspection of the interior. The inspection hatch 26 is provided, for example, in a recess 30 recessed from the front surface 18A of the shutter case 18.

[0034] (front plate) The front plate 20 is, for example, a rectangular metal plate that can close the inspection hatch 26 and is detachable from the peripheral edge 28 of the inspection hatch 26. This front plate 20 is detachable from the recess 30 in which the inspection hatch 26 is provided. In this case, the vertical dimensions of the front plate 20 are formed smaller than the vertical interior dimensions of the recess 30. Multiple front plates 20 may be provided in the recess 30. In this case, the width dimension of each front plate 20 is set slightly smaller than the overall width of the recess 30 divided by the number of front plates 20. In other words, the width dimension of each front plate 20 is set so that a predetermined number of front plates 20 can be arranged side by side in the recess 30. Note that the number of recesses 30 in which the front plates 20 are provided is not limited to one, and multiple recesses 30 may be provided.

[0035] The front plate 20 is fastened to the peripheral edge 28 of the inspection hatch 26 using, for example, screws 32. Note that the means for fastening the front plate 20 is not limited to the screws 32, and lock pins or the like may also be used. For example, eight screws 32 are used per front plate 20. Female threads 36 corresponding to the screws 32 are formed in the peripheral edge 28 by, for example, burring. Through holes 34 for passing the screws 32 are formed in the front plate 20 (FIG. 3).

[0036] (locking member) The locking member 40 is provided on the lower part of the front plate 20, and is a member that can be locked to the lower edge 28D of the peripheral portion 28 of the inspection hatch 26. In the example shown in Figure 3, the locking member 40 is provided in one location, for example, in the center of the lower part of the front plate 20.

[0037] As shown in Fig. 5, the locking member 40 is formed, for example, by press-forming a metal plate. This locking member 40 integrally has a base 40A that is fixed to the front plate 20 and a hook portion 40B that is spaced apart from the front plate 20. As shown in Fig. 4(A), the base 40A may be fixed to the front plate 20 by, for example, three rivets 38. In this case, three rivet holes 40C are formed in the base 40A. Alternatively, as shown in Fig. 4(B), the base 40A may be fixed to the front plate 20 by, for example, welding.

[0038] The hook portion 40B is disposed, for example, parallel to and spaced from the front plate 20. This gap is set to be slightly wider than the thickness of the lower edge 28D. As shown in FIG. 2(A), when the front plate 20 is attached, the front plate 20 overlaps the outside of the lower edge 28D, and the locking member 40 overlaps the inside of the lower edge 28D. As shown in FIG. 4, the lower end of the locking member 40 may protrude downward beyond the lower end of the front plate 20 at the attachment position of the locking member 40.

[0039] The hook portion 40B may be formed with a vertically long slot 40D for inserting the screw 32 therethrough.

[0040] When the locking member 40 is hooked onto the lower edge 28D of the peripheral portion 28, the elasticity of the hook portion 40B may cause the lower edge 28D to be sandwiched between the front panel 20 and the locking member 40. Specifically, the gap between the front panel 20 and the hook portion 40B may be slightly smaller than the thickness of the lower edge 28D. Furthermore, the front panel 20 and the hook portion 40B may not be parallel, and for example, the gap between the front panel 20 and the hook portion 40B may be narrowed downward. The hook portion 40B may be elastically deformed so that the lower edge 28D of the peripheral portion 28 fits between the front panel 20 and the hook portion 40B.

[0041] The overlap between the front panel 20 and the lower edge 28D, the overlap between the hook portion 40B of the locking member 40 and the lower edge 28D, and the gap between the front panel 20 and the hook portion 40B are appropriately set, taking into account the moment when the front panel 20 tries to fall forward, so that the moment will not cause the front panel 20 to come off the shutter case 18.

[0042] (action) This embodiment is configured as described above, and its operation will be described below. In Fig. 2(A), in the shutter device 100 according to this embodiment, the inspection hatch 26 can be closed with the front plate 20. The front plate 20 is detachable from the peripheral edge 28 of the inspection hatch 26. A locking member 40 is provided at the bottom of the front plate 20, which can be locked to the lower edge 28D of the peripheral edge 28 of the inspection hatch 26. Therefore, as shown in Fig. 2(B), even if the fastening of the front plate 20 to the peripheral edge 28 of the inspection hatch 26 is loosened by loosening or removing the fixing screws 32, the front plate 20 is prevented from tipping outward from the inspection hatch 26.

[0043] Specifically, the front panel 20 and the locking member 40 overlap the outside and inside of the lower edge 28D of the peripheral portion 28 of the inspection hatch 26, so that the front panel 20 and the locking member 40 get caught on the lower edge 28D when the front panel 20 tries to fall outside the inspection hatch 26. This makes it possible to prevent the front panel 20 from coming off the lower edge 28D.

[0044] In this embodiment, in a structure in which the inspection hatch 26 is provided in the recess 30 of the shutter case 18, it is possible to prevent the front panel 20 from tipping over. Therefore, the front panel 20 can be temporarily placed, making it easier to perform tasks such as removing the screws 32. When multiple locking members 40 are provided, the front panel 20 can be temporarily placed against the peripheral edge 28 of the inspection hatch 26 more stably.

[0045] If the lower end of locking member 40 protrudes downward below the lower end of front panel 20 at the installation position of locking member 40, the worker can visually check locking member 40 and can easily insert locking member 40 into the back side of lower edge 28D of peripheral portion 28 of inspection hatch 26 when installing front panel 20 to inspection hatch 26. This further improves workability.

[0046] If the locking member 40 has an elongated hole 40D, when the front plate 20 is fixed to the peripheral edge 28 of the inspection hatch 26 with a screw 32, the screw can be passed through the elongated hole 40D. When the screw 32 passed through the elongated hole 40D is loosened to a certain extent while still threadedly engaging with the peripheral edge 28, even if the front plate 20 falls, it will not immediately interfere with the screw 32, so the front plate 20 can be allowed to fall a certain amount.

[0047] According to this embodiment, it is possible to prevent the front panel 20 from falling over when it is attached or detached, thereby improving maintainability.

[0048] [Second embodiment] 6 to 9, in a shutter device 200 according to this embodiment, the shutter case 18 does not have a recess 30 as in the first embodiment, and an inspection hatch 26 is provided on the front surface 18A of the shutter case 18. The front plate 20 is detachable from the front surface 18A. The front plate 20 has a through hole 34 for passing a screw 32. At the lower end of the front plate 20, a downwardly opening notch 44 is formed in place of the through hole 34. The screw 32 is also passed through this notch 44. By providing the notch 44, the notch 44 can be hooked onto the screw 32 or removed from the screw 32 while the screw 32 is attached to the female thread portion 36. This makes it easy to temporarily place the front plate 20.

[0049] 7 and 9, in this embodiment, the locking members 40 are provided at, for example, two locations on the lower part of the front plate 20. As in the first embodiment, the hooking portion 40B of the locking member 40 has an elongated hole 40D formed therein, but the screw 32 is not passed through this elongated hole 40D. To standardize the parts, the same locking members 40 as in the first embodiment are used.

[0050] In this embodiment, the front plate 20 is provided with notches 44 for the screws 32 to pass through, and the front plate 20 is provided with locking members 40 at two locations, so that the front plate 20 can be prevented from tipping over even in a structure in which the inspection hatch 26 is provided on the front surface 18A of the shutter case 18. In addition, the front plate 20 can be temporarily placed in a stable manner, thereby improving maintainability.

[0051] [Reference example] 10 , in a shutter device 300 according to a reference example, similar to the first embodiment, an inspection hatch 26 is provided in a recess 30 recessed from the front surface 18A of the shutter case 18. Bolts 42 (hexagon socket head cap screws), for example, are attached to the upper (ceiling) and lower (bottom) portions of the recess 30. The heads of the bolts 42 are positioned so as to overlap the front panel 20 in the depth direction of the recess 30. As shown in FIG. 10(B), when the fastening of the front panel 20 to the peripheral edge 28 of the inspection hatch 26 is loosened, even if the front panel 20 attempts to fall outward from the inspection hatch 26, the front panel 20 abuts against the bolts 42, thereby preventing further falling of the front panel 20. This prevents the front panel 20 from falling outward from the inspection hatch 26. In addition, by sliding the front plate 20 in the left-right direction, the front plate 20 can be removed from the shutter case 18 without removing the bolts 42.

[0052] [Other embodiments] The above describes one example of an embodiment of the present invention, but the embodiment of the present invention is not limited to the above, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0053] The configuration of the locking member 40 is not limited to that described above, and any configuration is acceptable as long as it can lock the lower part of the front panel 20 to the lower edge 28D of the peripheral portion 28 of the inspection hatch 26 so that the front panel 20 does not fall over when the screw 32 is loosened.

[0054] Although the inspection hatch 26 and the front plate 20 are provided on the front face 18A of the shutter case 18, they may be provided somewhere other than the front face 18A. [Explanation of symbols]

[0055] 2 Opening 10 Shutter Curtain 18 Shutter Case 18A front 20 Front panel (blocking member) 22 Side frame 26 Inspection hatch 28 Periphery 28D lower edge 30 recess 40 Locking member 100 Shutter Device 200 Shutter Device 300 Shutter Device

Claims

1. A shutter curtain that is guided by left and right guide rails provided at both ends of the width direction of the opening of the building and can open and close the opening; A shutter case is provided to connect the upper ends of the left and right guide rails, the shutter curtain can be rolled up and stored, and an inspection port is provided to allow the interior to be inspected; A closing member that can close the inspection hatch and is detachable from the peripheral portion of the inspection hatch; a locking member provided at a lower portion of the closing member and capable of being locked to a lower edge of the peripheral edge portion; A shutter device having:

2. 2. The shutter device according to claim 1, wherein the closing member overlaps the outside of the lower edge and the locking member overlaps the inside of the lower edge when the closing member is attached.

3. The shutter device according to claim 2 , wherein a lower end of the locking member projects downwardly beyond a lower end of the closing member at the attachment position of the locking member.

4. The inspection hatch is provided in a recess recessed from the front surface of the shutter case, The shutter device according to any one of claims 1 to 3, wherein the closing member is detachably attached to the recess.

5. The inspection hatch is provided on the front surface of the shutter case, The shutter device according to any one of claims 1 to 3, wherein the blocking member is detachable from the front surface.

6. The shutter device according to claim 1 , wherein a plurality of the locking members are provided.

7. The shutter device according to claim 1 , wherein the blocking member is provided with a vertically long slot.

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