Inspection port structure of shutter

Abstract

To provide an inspection port structure of shutter which enables opening of an inspection port even though it is space-saving.SOLUTION: An inspection structure of shutter includes: an inspection port 4 formed at a case lower surface part 17; and a lid 8 for opening / closing the inspection port 4. The inspection port 4 includes: a pair of first edges 40 extending in the case width direction; and a pair of second edges 41 extending in the case depth direction. The case lower surface part 17 includes: a pair of first edge parts 5 in the vicinity of the pair of first edges 40; and a pair of second edge parts 6 in the vicinity of the pair of second edges 41. At the first edge part 5 of the case lower surface part 17, a pair of rails 7 extending in the case width direction is fixed. The lid 8 can slide in the case width direction between a closing posture for closing the inspection port 4 and an opening posture for opening the inspection port 4 by being guided by the pair of rails 7.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an inspection hatch structure for a shutter. [Background technology]

[0002] An electric shutter rotates a winding shaft using an opening / closing device located inside the shutter case to unwind a shutter curtain to close the opening, and then rewinds the shutter curtain to open the opening. Electric shutters have an inspection hatch with a rotatable lid on the underside of the shutter case to allow for maintenance of the drive mechanism, including the opening / closing device (Patent Document 1).

[0003] In some electric shutters, the shutter case is constructed from a steel case installed inside the ceiling due to fire prevention equipment, etc., but in inspection hatches with pivoting lids, depending on the dimensions and position of the ceiling inspection hatch, the lid may interfere with the ceiling when the lid is opened, which can make it difficult to work through the inspection hatch. Figure 8 shows an example in which the lid 8' that opens and closes the inspection hatch interferes with the ceiling, making it difficult to fully open the lid 8'. [Patent Document 1] Patent Publication No. 2010-7274 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0004] The present invention aims to provide a shutter inspection hatch structure that allows the inspection hatch to be opened even in a space-saving manner. [Means for solving the problem]

[0005] The technical means adopted by the present invention are: The inspection hatch is formed on the bottom surface of the case, and a lid is provided for opening and closing the inspection hatch. The inspection hatch has a pair of first edges extending in the case width direction and a pair of second edges extending in the case projection direction, and the case underside has a pair of first edge portions near the pair of first edges and a pair of second edge portions near the pair of second edges, A pair of rails extending in the width direction of the case are fixed to the first edge portion of the lower surface of the case, The lid is guided by the pair of rails and is slidable in the case width direction between a closed position in which the inspection hatch is closed and an open position in which the inspection hatch is opened. This is the structure of the shutter inspection hatch. In one embodiment, a ceiling inspection hatch is located below the lower surface of the case. In one embodiment, the case underside is made up of multiple case underside panels connected together in the case width direction with their ends overlapping, and an inspection hatch is formed in the end case underside panel (located below the opening and closing mechanism) located at one end of the case width direction.

[0006] In one embodiment, the pair of rails are fixed to the lower surface of the case lower surface portion, In the closed position, the lid closes the inspection hatch from below, In the open position, the lid faces the lower surface of the case lower surface portion.

[0007] In one embodiment, the inspection hatch and the lid have a rectangular shape extending in the width direction of the case, In the closed position, A pair of long edges of the lid are positioned within the pair of rails, a pair of short edges of the lid are adjacent to a lower surface of the second edge of the case lower surface; A protrusion is provided on at least one of the upper surface of at least one of the short edge portions and the lower surface of the second edge portion, and at least one of the short edge portions and the second edge portion abut via the protrusion.

[0008] In one embodiment, a handle is provided on the door front side of the lid, In the closed position, the handle portion abuts against the second edge on the door tip side, In the open position, the handle portion abuts against a second edge on the door trailing edge side. [Effects of the Invention]

[0009] In the present invention, by making the inspection hatch on the underside of the case a sliding open / close type, it is possible to provide a shutter inspection hatch structure that allows the inspection hatch to be opened even in a space-saving manner, and even when the shutter case is installed inside the ceiling, the inspection hatch can be opened and closed regardless of the dimensions or position of the ceiling inspection hatch, improving inspection workability.

[0010] A pair of rails are fixed to the underside of the bottom surface of the case, and when the lid is in the closed position, a pair of long edge portions of the lid are positioned within the pair of rails, a pair of short edge portions of the lid are close to the underside of the second edge portion of the bottom surface of the case, and a protrusion is provided on at least one of the upper surface of at least one of the short edge portions and the lower surface of the second edge portion, and at least one of the short edge portions and the second edge portion abuts via the protrusion.In this case, the friction generated when the protrusion abuts and is pressed against the second edge portion of the bottom surface of the case reduces the risk of the inspection hatch being opened due to earthquake vibrations, etc., and also prevents the generation of abnormal noise due to vibrations. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic front view of a shutter device equipped with an inspection hatch structure according to an embodiment of the present invention (the ceiling is omitted). FIG. [Figure 1A] In Figure 1, this is a partially enlarged view showing the inspection structure area, with the ceiling indicated by a two-dot chain line. [Figure 2] 2 is a vertical cross-sectional view of the shutter case shown in FIG. 1 (the shutter curtain is omitted). [Figure 2A] FIG. 3 is a partially enlarged view showing the inspection hatch structure portion in FIG. 2. [Figure 3] FIG. 2 is a bottom view of the shutter case shown in FIG. [Figure 3A]FIG. 4 is a partially enlarged view showing an inspection structure portion in FIG. 3. [Figure 4] 1 is a bottom view of a case bottom plate equipped with an inspection hatch structure according to this embodiment, and a cross-sectional view of the case bottom plate taken along arrow A. FIG. [Figure 5] The upper figure is a cross-sectional view of the case bottom plate shown in FIG. 4 taken along the line B, and the lower figure is a cross-sectional view of the case bottom plate shown in FIG. 4 taken along the line C. [Figure 6] FIG. 2 is a bottom view showing the open position of the inspection hatch structure according to this embodiment. [Figure 7] This is a bottom view showing the open position of the inspection hatch structure of this embodiment, with the ceiling inspection hatch shown by a two-dot chain line. [Figure 8] FIG. 1 is a vertical cross-sectional view of a shutter case equipped with a conventional inspection hatch structure (the shutter curtain is omitted). DETAILED DESCRIPTION OF THE INVENTION

[0012] [A] Overall structure of the shutter An embodiment of the present invention will be described in detail with reference to the drawings. In the shutter device according to this embodiment, a shutter case 1 made of a steel case (which may be made of stainless steel or aluminum) is attached inside the ceiling CL, and is compatible with fire prevention equipment. Note that the shutter employing the inspection hatch structure according to the present invention is not limited to a shutter case that fits inside the ceiling.

[0013] [A-1] Shutter Overview As shown in Figures 1 and 2, an opening / closing device M and a winding shaft 2 are provided inside the shutter case 1, and the opening / closing device M and the winding shaft 2 are power-coupled by a power transmission mechanism (not shown), and when the opening / closing device M drives the winding shaft 2 to rotate, a shutter curtain (not shown) is wound onto the winding shaft 2 to open the opening, and the shutter curtain is unwound from the winding shaft 2 to close the opening. When the opening is opened or closed, the shutter curtain is guided by guide rails 3 erected at both ends of the opening in the width direction, and moves up and down.

[0014] [A-2] Shutter case As shown in Figures 1 and 2, the shutter case 1 is made up of left and right brackets 10 that are provided in a corrugated shape from the frame within the ceiling CL, a framework made up of multiple horizontal members that connect the left and right brackets 10, a case top surface part 15 made up of multiple case plate materials attached to the framework, a case front surface part 16, and a case bottom surface part 17. The ceiling CL is omitted in Figure 1.

[0015] In this embodiment, the cross members consist of a first angle member 11 located on the upper side facing the main body, a second angle member 12 located on the upper side facing away from the main body, a third angle member 13 located on the lower side facing away from the main body, and a square pipe member 14. The square pipe member 14 holds a smoother 140. An inner lintel 18 and an outer lintel 19 are provided above the opening and located on the ceiling CL.

[0016] As shown in Figures 1 and 2, the case top portion 15 of this embodiment is formed by connecting multiple case top plates 150 in the opening width direction so that their ends overlap, the case front portion 16 is formed by connecting multiple case front plates 160 in the opening width direction so that their ends overlap, and the case bottom portion 17 is formed by connecting multiple case bottom plates 170 in the opening width direction so that their ends overlap.

[0017] A rectangular inspection hatch 4 extending in the width direction of the case is formed in the end case bottom plate 170' located below the opening / closing device M. The ceiling CL is located below the case bottom portion 17 at a distance, and the inspection hatch 4 is located above a ceiling inspection hatch 9 formed in the ceiling CL. The ceiling inspection hatch 9 is shown in Figures 2, 2A, and 7 (two-dot chain line). Note that the ceiling inspection hatch 9 is normally closed with a lid (not shown).

[0018] The front end of the end case bottom plate 170' according to this embodiment is arranged to overlap from below the adjacent case bottom plate 170. In other words, the bottom surface of the end case bottom plate 170' is positioned lower than the bottom surface of the adjacent case bottom plate 170, so that the adjacent case bottom plate 170 does not affect the opening and closing of the lid 8.

[0019] [B] Inspection hatch structure [B-1] Sliding inspection hatch structure 2A, the inspection hatch 4 is a rectangular opening extending in the case width direction, and has a pair of first edges (long edges) 40 extending in the case width direction and a pair of second edges (short edges) 41 extending in the case front-to-rear direction. In the end case bottom panel 170', the peripheral edge of the inspection hatch 4 has a pair of first edge portions (long edges) 5 near the pair of first edges 40, and a pair of second edge portions (short edges) 6 near the pair of second edges 41.

[0020] A pair of rails 7 extending in the width direction of the case are fixed to a pair of first edges 5 of the end case bottom panel 170', and the inspection hatch 4 can be opened and closed by a lid 8 that can slide in the width direction of the case using the pair of rails 7.

[0021] The lid 8 is a rectangular plate extending in the width direction of the case, and has a pair of long edges 80 and a pair of short edges 81, one of which (the side closer to the case bottom panel 170 adjacent to the end case bottom panel 170') is the door trailing edge, and the other short edge 81 (the side farther from the case bottom panel 170) is the door leading edge.

[0022] As shown in Figures 5, 4, etc., rail 7 is made up of a horizontal fixed edge 70, an inclined edge 71, and a horizontal support edge 72, and with fixed edge 70 adhered to the underside of first edge 5, it is fixed with blind rivets 73 at multiple locations in the rail length direction, so that long edge 80 of lid 8 can be slidably received between first edge 5 and support edge 72. In this embodiment, by adhering fixed edge 70 to the underside of first edge 5 (with adhesive, pressure-sensitive adhesive, double-sided adhesive tape, etc.), it is possible to prevent the creation of a gap between fixed edge 70 and first edge 5 that would allow the edge of lid 8 to get in.

[0023] The lid 8 has long edges 80 guided by a pair of rails 7, and is capable of sliding in the case width direction between a closed position (see FIGS. 2, 2A, and 4) in which the inspection hatch 4 is closed, and an open position (see FIGS. 6 and 7) in which the inspection hatch 4 is open. In the rectangular lid 8 extending in the case width direction, the side closer to the adjacent case bottom panel 170 is the tail side, and the side farther from the adjacent case bottom panel 170 (the side closer to the bracket 10 on the opening / closing mechanism M side) is the front side.

[0024] When the lid 8 is in the closed position, a pair of long edges 80 of the lid 8 are positioned within a pair of rails 7 (between the first edge 5 and the support edge 72), and a pair of short edges 81 of the lid 8 are closely opposed to the underside of the second edge 6 on the door leading and trailing sides of the end case bottom panel 170', and the lid 8 blocks the inspection hatch 4 from below.

[0025] The lid 8, which is in the closed position, is slid toward the case bottom plate 170 (away from the bracket 10 on the opening / closing device M side) so that it overlaps the adjacent case bottom plate 170, thereby placing the inspection hatch 4 in an open position. As shown in Figure 6, when the lid 8 is in the open position, the door-end side portions of the pair of long edge portions 80 of the lid 8 are positioned within the pair of rails 7, and most of the surface of the lid 8 faces, but is spaced apart from, the underside of the case bottom plate 170 adjacent to the end case bottom plate 170'.

[0026] A handle 82 is provided on the leading edge of the lid 8, and the lid 8 can be manually slid by grasping the handle 82. When the lid 8 is in the closed position, a portion of the handle 82 (a portion located on the upper side of the top surface of the face of the lid 8; in this embodiment, a nut or a flat washer) abuts against the second edge 41 on the leading edge side of the inspection hatch 4, and when the lid 8 is in the open position, a portion of the handle 82 (a portion located on the upper side of the top surface of the face of the lid 8; in this embodiment, a nut 85 or a washer 84) abuts against the second edge 41 on the trailing edge side, so that the handle 82 functions as a stopper and prevents the lid 8 from falling off when sliding. Although the handle 82 in this embodiment protrudes downward from the lid 8, it may be a recessed portion protruding upward from the lid 8, and the recessed portion may also function as a stopper.

[0027] The handle 82 in this embodiment is detachable from the lid 8, and by removing the handle 82 from the lid 8, the lid 8 can be slid and removed from the end case bottom panel 170'. For example, by changing the orientation of the lid 8, it is possible to change the left-right direction depending on the site.

[0028] In this embodiment, the case bottom plate 170 equipped with the inspection hatch structure, i.e., the end of the end case bottom plate 170', is attached to the case framework so that the end of the case bottom plate 170' overlaps the end of the case bottom plate 170 already attached to the case framework. At this time, the fastening means (blind rivets 73) that secure the rail 7 to the end case bottom plate 170' are located close to the third angle member 13 and the square pipe member 14 (see FIG. 2A), respectively, making it easier to position the end case bottom plate 170' when attaching it.

[0029] In this embodiment, the lid 8 slides along the underside of the case bottom portion 17, but the inspection hatch 4 may also be opened and closed by the lid 8 sliding along the upper surface of the case bottom portion 17. In this case, the oblique end of the end case bottom plate 170' is arranged to overlap the adjacent case bottom plate 170 from above. A locking device may also be provided on the lid 8 to maintain the closed position of the lid 8.

[0030] [B-2] Vibration response measures In this embodiment, when the lid 8 is in the closed position, the pair of long edges 80 of the lid 8 are positioned within the pair of rails 7 (between the first edge 5 and the support edge 72) and rest on the support edge 73, and there is a risk that the lid 8 will move and open the inspection hatch 4 due to an earthquake or vibrations caused by opening and closing the shutter. In addition, there is a risk that the lid 8 will come into contact with the first edge 5, the support edge 72, or the inclined edge 71 due to vibrations, generating abnormal noise.

[0031] In the lid 8 of this embodiment, a protrusion 83 is provided on the upper surface of the short edge portion 81 on the door leading side, and when the lid 8 is in the closed position, the short edge portion 81 on the door leading side of the lid 8 abuts against the underside of the second edge portion 6 on the door leading side of the end case bottom panel 170' via the protrusion 83.

[0032] In other words, when the lid 8 is in the closed position, a pair of long edges 80 of the lid 8 are positioned within a pair of rails 7 (between the first edge 5 and the support edge 72 and abutting the support edge 72), and the surfaces of both short edges 81 of the lid 8 (on the door leading side and the door trailing side) are close to the underside of the second edge 6 of the end case bottom panel 170', and the protrusion 83 formed on the short edge 81 on the door leading side of the lid 8 abuts the underside of the second edge 6 on the door leading side of the end case bottom panel 170'.

[0033] The friction generated by the protrusion 83 abutting and pressing against the second edge 6 of the end case bottom panel 170' (in addition to contact between the long edge 80 of the lid 8 and the support edge 72, the protrusion 83 of the short edge 81 also comes into contact with the second edge 6) reduces the risk of the lid 8 moving and opening the inspection hatch 4 due to an earthquake or vibrations when the shutter is opened or closed, and also prevents the generation of abnormal noise due to vibrations.

[0034] In the illustrated embodiment, one protrusion 83 is provided on the upper surface of the short edge 81 on the leading edge side of the lid 8, but the location (leading edge side or trailing edge side) and number (not limited to one, but multiple in the projection direction) of the protrusion 83 are not limited. For example, the protrusion 83 may be provided on the upper surface of the short edge 81 on the trailing edge side of the lid 8, or the protrusion 83 may be provided on the underside of the second edge 6 of the end case bottom plate 170'. In other words, the protrusion 83 can be provided on one or both of the closely opposing short edge 81 and second edge 6. [Explanation of symbols]

[0035] 1 shutter case 17 Bottom of the case 170 Case bottom panel 170' End case bottom plate (case bottom plate with inspection hatch) 4 Inspection hatch 40 First Edge 41 Second Edge 5 First edge of bottom panel of case 6 Second edge of the case bottom plate 7 Rail 8 Lid 80 Long edge 81 Short edge 82 Hand 83 Protrusion 9 Ceiling inspection hatch CL Ceiling M Opening and Closing Machine

Claims

1. The inspection hatch is formed on the bottom surface of the case, and a lid is provided for opening and closing the inspection hatch. The inspection hatch has a pair of first edges extending in the case width direction and a pair of second edges extending in the case projection direction, and the case underside has a pair of first edge portions near the pair of first edges and a pair of second edge portions near the pair of second edges, A pair of rails extending in the width direction of the case are fixed to the first edge portion of the lower surface of the case, The lid is guided by the pair of rails and is slidable in the case width direction between a closed position in which the inspection hatch is closed and an open position in which the inspection hatch is opened. Shutter inspection hatch structure.

2. the pair of rails are fixed to the lower surface of the case lower surface portion, In the closed position, the lid closes the inspection hatch from below, In the open position, the lid faces the lower surface of the case lower surface portion. The shutter inspection hatch structure according to claim 1.

3. The inspection hatch and the lid have a rectangular shape extending in the case width direction, In the closed position, A pair of long edges of the lid are positioned within the pair of rails, a pair of short edges of the lid are adjacent to a lower surface of the second edge of the case lower surface; a protrusion is provided on at least one of an upper surface of at least one short edge portion and a lower surface of the second edge portion, and the at least one short edge portion and the second edge portion abut against each other via the protrusion; The shutter inspection hatch structure according to claim 2.

4. A handle is provided on the door front side of the lid, In the closed position, the handle portion abuts against the second edge on the door tip side, In the open position, the handle portion abuts against a second edge on the door trailing edge side. The shutter inspection hatch structure according to claim 1.

5. A ceiling inspection hatch is located below the bottom surface of the case. An inspection hatch structure for a shutter according to any one of claims 1 to 4.

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