Shutter case structure for building shutter device

Abstract

To prevent deformation of a front lower frame material 9 when bending of a magnesia frame material 11 provided in a shutter case 5 under its own weight is corrected using a turnbuckle 17 as bending correction means.SOLUTION: A front edge 18d of an auxiliary frame material 18 with a rear edge connected to the magnesia frame material 11 is made to be left in a free end state not connected to a front lower frame material 9; a lower locking portion 17b of a turnbuckle 17 is locked to the auxiliary frame material 18 in the resulting free end state; and the turnbuckle 17 is adjusted for reduction, resulting in that the magnesia frame material 11 is lifted together with the auxiliary frame material 18 without deformation of the front lower frame material 9, thereby correcting bending.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to the technical field of shutter case structures in building shutter devices installed at openings such as entrances of buildings such as buildings and houses.

Background Art

[0002] Generally, in order to open and close an opening such as an entrance of a building such as a building or a house, a building shutter device may be installed at the opening. Such a shutter device includes guide rails provided on the left and right sides of the opening, a shutter curtain that is guided to open and close along the guide rails, a winding body (winding drum, winding wheel) provided on the ceiling above the opening for winding the shutter curtain, and a shutter case that covers the winding body around which the shutter curtain is wound, and is configured with various member devices. In this case, the shutter case is generally configured by brackets disposed at both left and right edge portions, with both left and right edge portions of the winding body rotatably supported, and a frame material supported between the front, rear, upper, and lower portions of the left and right brackets, and its outer periphery is covered with a case plate. More specifically, as the frame material, it is generally configured to include upper and lower frame materials on the front side (front side) (front upper frame material, front lower frame material) and upper and lower frame materials on the rear side (rear side) (rear upper frame material, rear lower frame material). Among them, the rear lower frame material is configured as a front edge side component of the magusa portion that serves as an entrance (feeding port) of the shutter curtain fed out from the winding body into the shutter case, that is, as a magusa frame material. In such a shutter case, since the magsa frame member needs to support and guide the shutter curtain passing through the swallowing port, it needs to be stronger in strength than other frame members. To make it stronger in this way, the magsa frame member becomes heavy. As a result, when the lateral width of the opening becomes wide, the magsa frame member itself may bend under its own weight with the central part in the lateral direction being in a lower position. As a shutter device, although it is designed so that such bending of the magsa frame member does not cause a problem in function, there is a problem that the appearance is impaired because it is visually recognized as a shutter case in a state where the central part of the magsa part is bent downward. Therefore, attempts have been made to correct such bending of the magsa frame member (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, all of the conventional ones integrally connect the magsa frame member and the front lower frame member via an auxiliary frame member, and the lower locking portion of the turnbuckle adopted as the bending correction means is locked to the portion (front end side portion) on the front lower frame member side of the auxiliary frame member, and the turnbuckle is reduced and adjusted to lift the magsa frame member that is bent downward on the lower side, thereby attempting to correct the bending of the magsa frame member. However, when the auxiliary frame member integrally connected to the magsa frame member and the front lower frame member is lifted by reducing and adjusting the turnbuckle in this way, the portion on the front lower frame portion side of the auxiliary frame member will be forcibly lifted together with the front lower frame member as a result, and the correction of the bending of the magsa frame member will be a correction accompanied by a load in the direction of lifting not only the magsa frame member but also the front lower frame member. As the front lower frame member, there are problems such as having to be designed to cope with this load. Therefore, in order to avoid this, the lower locking position of the turnbuckle with respect to the auxiliary frame member is set to an inclined state biased toward the magsa frame member side. In consideration of reducing the load that attempts to lift the front lower frame member when the turnbuckle is adjusted to be smaller to correct the deflection of the magsa frame member, when the turnbuckle is in such an inclined state, there are problems such as the correction force when the turnbuckle is operated to be smaller becomes a component force in the front-rear direction and is dispersed, and effective deflection correction is impaired. These are the problems to be solved by the present invention.

Means for Solving the Problems

[0005] The present invention was created for the purpose of solving these problems in view of the above circumstances. The invention according to claim 1 is a building shutter device comprising guide rails provided on the left and right sides of an opening such as a building entrance, a shutter curtain that is guided to open and close along the guide rails, a winding body that winds the shutter curtain, and a shutter case that covers the winding body. In the building shutter device, the shutter case is formed of a framework including at least left and right brackets supported on the housing side, upper front and lower front frame members provided between the front edge portions of the left and right brackets, and a magsa frame member provided at the entrance of the shutter curtain. The shutter case is configured to be provided with length-adjustable deflection correction means including upper and lower locking portions and an intermediate adjustment portion for correcting the deflection caused by the self-weight of the magsa frame member. The auxiliary frame member, to which the rear edge is integrally connected to the magsa frame member and to which the lower locking portion of the deflection correction means is locked, has a free end state in which the front edge thereof is vertically movable with respect to the lower front frame member and is not connected. The upward movement of the auxiliary frame member for correcting the deflection of the magsa frame member accompanying the reduction adjustment of the deflection correction means is executed in a state of moving upward with respect to the lower front frame member. This is the shutter case structure in the building shutter device. The invention according to claim 2 is the shutter case structure in the building shutter device according to claim 1, characterized in that a reinforcing frame member is provided between the upper front and lower front frame members, and the deflection correction means has an upper locking portion locked to the reinforcing frame member. The invention according to claim 3 is a shutter case structure in a building shutter device according to claim 2, characterized in that the reinforcing frame member is configured to include a connecting piece portion connected to the upper front and lower front frame members, and a locking piece portion provided in a state located behind the front edge of the auxiliary frame member, and an upper locking portion is locked to the locking piece portion. The invention according to claim 4 is a shutter case structure in a building shutter device according to claim 2, characterized in that the deflection correction means is attached in a substantially perpendicular state between the reinforcing frame member and the auxiliary frame member. The invention according to claim 5 is a shutter case structure in a building shutter device according to claim 3 or 4, characterized in that a locking receiving portion for locking the upper locking portion is formed at a portion of the locking piece portion behind the front edge of the auxiliary frame member. The invention according to claim 6 is a shutter case structure in a building shutter device according to claim 4, characterized in that a fitting recess into which at least a part of an adjusting portion of the deflection correction means in a substantially perpendicular state is fitted is formed in the locking piece portion. The invention according to claim 7 is a shutter case structure in a building shutter device according to claim 6, characterized in that the fitting recess is formed in a notch groove shape below the locking receiving portion of the locking piece portion. The invention according to claim 8 is a shutter case structure in a building shutter device according to claim 2, characterized in that the reinforcing frame member is a first reinforcing frame member, and at least one second reinforcing frame member is provided between the upper front and lower front frame members with a gap in the left-right direction with respect to the first reinforcing frame member. The invention according to claim 9 is a shutter case structure in a building shutter device according to claim 8, characterized in that the first reinforcing frame member is provided at the central portion in the left-right direction of the shutter case, and at least a pair of second reinforcing frame members are provided with a gap in the left-right direction with respect to the first reinforcing frame member.

Advantages of the Invention

[0006] By adopting the invention of claim 1, the lower locking portion of the deflection correction means provided for correcting the deflection caused by the self-weight of the shutter frame member is locked to the auxiliary frame member whose rear end edge is connected to the shutter frame member. In this state, the deflection correction means is adjusted to be reduced to correct the deflection of the shutter frame member. In this case, since the front end edge of the auxiliary frame member is in a free end state where it can move up and down without being connected to the front lower frame member, the upward movement of the auxiliary frame member for correcting the deflection of the shutter frame member is executed in a state of moving upward with respect to the front lower frame member. As a result, it is possible to correct the deflection of the shutter frame member without causing deformation of the front lower frame member. By adopting the invention of claim 2, the upper locking portion of the deflection correction means is locked to the reinforcing frame member provided between the front upper and front lower frame members, so that the arrangement of the deflection correction means can be made closer to the front side of the front upper and front lower frame members without interfering with the shutter curtain wound around the winding body. Thus, it is possible to avoid increasing the size of the shutter case while providing the deflection correction means. By adopting the invention of claim 3, a locking piece portion to which the upper locking portion of the deflection correction means is locked is provided on the reinforcing frame member to which the connecting piece portion is connected to the front upper and front lower frame members. As a result of the locking piece portion being provided in a state where it is located behind the front end edge of the auxiliary frame member, the deflection correction means can be arranged without interfering with the connecting piece portion and the front upper and front lower frame members. By adopting the invention of claim 4, the deflection correction means is attached in a substantially vertical state between the reinforcing frame member and the auxiliary frame member. As a result, when the deflection correction means is adjusted to be reduced, the correction force is dispersed as a component force in the front-rear direction, and it effectively functions as the deflection correction force of the shutter frame member. By adopting the invention of claim 5, the locking receiving portion formed on the locking piece portion for locking the upper locking portion is arranged at a position behind the front end edge of the auxiliary frame member. As a result, it is ensured that the deflection correction means can be arranged without interfering with the connecting piece portion and the front upper and front lower frame members. By adopting the invention of claim 6, a fitting recess is formed in the locking piece portion into which at least a part of the adjusting portion of the deflection correction means in a substantially vertical state is fitted. As a result, the deflection correction means in a substantially vertical state can be arranged without difficulty. According to the invention of claim 7, as the fitting recess is formed in a notch groove shape below the locking receiving portion of the locking piece portion, the formation of the fitting recess becomes easy. According to the invention of claim 8, at least one second reinforcing frame member is provided between the front upper and front lower frame members with a gap in the left-right direction with respect to the first reinforcing frame member which is a reinforcing frame member to which the upper locking portion of the deflection correction means is locked. As a result, the front side member of the shutter case including the first reinforcing frame member that receives the deflection correction force can be reinforced by the second reinforcing frame member. According to the invention of claim 9, the first reinforcing frame member is symmetrically reinforced in the left-right direction by at least a pair of second reinforcing frame members provided with a gap in the left-right direction, so that the front side member of the shutter case can be reinforced in a balanced state in the left-right direction.

Brief Description of the Drawings

[0007]

Figure 1

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Figure 11

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a shutter device for a building installed at an opening E such as an entrance of a building. The shutter device 1 includes guide rails 2 provided on the left and right sides of the opening E, a shutter curtain 3 guided to open and close along the guide rails 2, a winding body 4 provided above the opening E for winding the shutter curtain 3, a shutter case 5 covering the winding body 4, and various member devices such as an electric opening and closing machine 6 disposed in the shutter case 5 for controlling the forward and reverse rotation of the winding body 4.

[0009] The shutter case 5 has a rectangular shape and includes left and right brackets 7 whose rear edge portions 7a are attached to a building side member (for example, a wall surface) W, front (front), front lower, rear (back) upper frame members 8, 9, 10 made of C-shaped steel provided between the left and right brackets 7, and a magsa frame member 11 made of a square tube-shaped profile provided between the rear lower portions of the left and right brackets 7 to form a front frame member of a magsa portion M that serves as an insertion port of the shutter curtain 3 into the shutter case 5. The formed frame is configured with case plates 12 provided between the necessary adjacent frames (front, upper, lower) of the front upper, front lower, rear upper frame members 8, 9, 10, and the magsa frame member 11. Furthermore, a guide roller 13 for guiding the shutter curtain 3 that is drawn out from the winding body 4 and reaches the upper end portion of the guide rail 2 is provided on the upper piece portion 11a of the magsa frame member 11. The shutter device 1 is configured such that the winding body 4 rotates forward and backward based on the drive control of the opening / closing mechanism 6 that is interlocked with the operation of an opening / closing switch (such as one provided at the opening E or a remote control type switch, etc.) (not shown). By the forward and backward rotation of the winding body 4, the shutter curtain 3 is fed out and wound around the winding body 4, and thus the shutter curtain 3 moves up and down guided by the guide rail 2 while being supported and guided by the guide roller (smoother roller) 13 at the magusa part M, and the opening / closing operation of the opening E is executed, all of which is the same as in the prior art.

[0010] In the shutter case 5 of the shutter device 1 configured as described above, first and second reinforcing frame members 14 and 15 are provided between the upper front and lower front frame members 8 and 9. The first reinforcing frame member (corresponding to the "reinforcing frame member" of the present invention) 14 is provided between the central portions in the left-right direction of the upper front and lower front frame members 8 and 9, and has a connecting piece portion 14a configured as a projecting piece, and a locking piece portion 14b configured as a finding piece by being bent from the rear edge of the connecting piece portion 14a to one side in the left-right direction, and has an L-shape in a plan view. At the upper and lower edge portions of the connecting piece portion 14a, upper and lower notch grooves 14aa and 14ab that are notched in an L-shape to fit over the corner portions of the lower side pieces 8a and upper side pieces 9a of the upper front and lower front frame members 8 and 9 and the rear side pieces 8b and 9b that are open, and upper and lower attachment piece portions 14ac and 14ad that are bent horizontally from the horizontal edges of the notch grooves 14aa and 14ab to be detachably attached to the lower side pieces 8a and upper side pieces 9a of the upper front and lower front frame members 8 and 9 via screws (fasteners) 16 are respectively formed. And the connecting piece portion 14a whose upper and lower edge portions are connected to the upper front and lower front frame members 8 and 9 in this way is configured such that the rear edge (the corner portion between the connecting piece portion 14a and the locking piece portion 14b) 14ae extends rearward beyond the rear side pieces 8b and 9b of the upper front and lower front frame members 8 and 9.

[0011] Incidentally, in the shutter case 5, the first and second reinforcing frame members 14 and 15 are provided between the front upper and front lower frame members 8 and 9, forming a lattice structure, thereby reinforcing the front upper and front lower frame members 8 and 9. Also, the guide rollers 13 provided on the magusa frame member 11 are generally provided symmetrically in the left-right direction at three locations, namely the central portion in the left-right direction and both left and right side portions thereof, or at two locations on both left and right side portions when the opening width of the opening E (the left-right width of the shutter curtain 3) is wide and deflection deformation of the magusa frame member 11 is assumed. When the guide rollers 13 are provided at the three locations, the first and second reinforcing frame members 14 and 15 are attached between the front upper and front lower frame members 8 and 9 in a state arranged at a front position facing the rear guide rollers 13 (see FIG. 1). When provided at two locations on the left and right, it is preferable that they be attached between the front upper and front lower frame members 8 and 9 in a state arranged at a front position facing the guide rollers 13 on both left and right sides and the central portion between the guide rollers 13. By setting it in this way, in an existing shutter device, there is an advantage that the position setting becomes easy when attaching a turnbuckle 17, which will be described later, as a retrofit. Of course, when only one guide roller 13 is attached at the central portion in the left-right direction, the first reinforcing frame member 14 can be provided at a position corresponding to the guide roller 14, and the second reinforcing frame member 15 can be provided on both left and right sides thereof as necessary. When providing the first and second reinforcing frame members 14 and 15 in this way, it is often suitable for position setting to be based on the arrangement position of the guide roller 13, but it is of course not necessarily limited to this. Needless to say, it goes without saying that they may be arranged at positions set as suitable positions in each shutter device without being provided at positions corresponding to the arrangement position of the guide roller 13. Furthermore, when fixing the attachment piece portions 14ac and 14ad formed in the notch grooves 14aa and 14ab to the lower side piece portions 8a and upper side piece portions 9a of the front upper and front lower frame members 8 and 9 via screws 16, the vertical piece portions of the notch grooves 14aa and 14ab are configured to abut (or be fixed by welding or the like) against the rear side piece portions 8b and 9b of the front upper and front lower frame members 8 and 9, thereby enhancing the strength.

[0012] On the other hand, the locking piece portion 14b of the first reinforcing frame member 14 is bent and formed from the rear end edge 14ae, which is located behind the rear side piece portion 9b of the front lower frame member 9 as described above, in either the left or right direction. An upper locking hole (corresponding to the "locking receiving portion" of the present invention) 14ba for locking the upper locking portion 17a of a turnbuckle (corresponding to the "bending correction means" of the present invention) 17, which will be described later, is formed in the middle portion in the vertical direction of the locking piece portion 14b. Below the upper locking hole 14ba, a fitting recess 14bb, which is an inverted L-shaped groove into which a part of an adjustment portion 17c provided in the middle in the vertical direction of the turnbuckle 17 fits in a loosely fitting state, is formed as a notch groove (hook groove) extending to the lower end edge of the locking piece portion 14b.

[0013] Also, a pair of the second reinforcing frame members 15 are provided on the left and right in a symmetric state with a gap therebetween with the first reinforcing frame member 14 at the center in the left-right direction as the symmetry axis between the front upper and front lower frame members 8 and 9. The second reinforcing frame member 15 has the same structure as the first reinforcing frame member 14 except that there are no counterparts to the upper locking hole 14ba and the fitting recess 14bb formed in the first reinforcing frame member 14. A connecting piece portion 15a, a locking piece portion (although the turnbuckle 17 is not locked as in the case of the first reinforcing frame member 14, it is referred to as the "locking piece portion" for convenience), 15b, an upper notch groove 15aa, a lower notch groove 15ab, an upper mounting piece portion 15ac, and a lower mounting piece portion 15ad are formed. Since it is detachably attached to the front upper and front lower frame members 8 and 9 via screws 16, the detailed description of the second reinforcing frame member 15 shall be made by referring to the description of the first reinforcing frame member 14.

[0014] In contrast, the rear edge of the auxiliary frame member 18 is attached to the front side piece portion 11b of the magsa frame member 11 at the center in the left-right direction. The auxiliary frame member 18 is composed of a profile material that forms an L shape in a front view and includes a vertical piece portion 18a and a lower piece portion 18b that is bent from the lower edge of the vertical piece portion 18a in either the left or right direction. A flat mounting piece portion 18c provided at the rear edge is integrally attached to the front side piece portion 11b of the magsa frame member 11 via screws 16. In this case, the auxiliary frame member 18 is configured to be long in the front-rear direction in a state where the vertical piece portion 18a passes through a position substantially directly below the upper locking hole 14ba formed in the locking piece portion 14b of the first reinforcing frame member 14. And the auxiliary frame member 18 with its rear edge attached to the magsa frame member 11 in this way is configured such that the front edge 18d is not connected to the rear side piece portion 9b of the front lower frame member 9 but abuts or is in close proximity to and faces the rear side piece portion 9b. As a result, the front edge 18d of the auxiliary frame member 18 is a free end (free edge) that is only disposed opposite to the rear side piece portion 9b of the front lower frame member 9 and is configured to be able to move freely up and down with respect to the front lower frame member 9.

[0015] As described above, a lower locking hole 18e for locking the lower locking portion 17b of the turnbuckle 17, which serves as the deflection correction means, is formed in the vertical piece portion 18a of the auxiliary frame member 18 configured in this way. The lower locking hole 18e is formed at a position behind the rear side piece portion 9b of the front lower frame member 9 and at a position substantially directly below the upper locking hole 14ba, that is, at a portion passing through a position substantially directly below the upper locking hole 14ba in the vertical piece portion 18a. The turnbuckle 17 is assembled in a substantially vertical state by locking the upper and lower locking portions 17a and 17b to the upper locking hole 14ba formed in the locking piece portion 14b of the first reinforcing frame member 14 and the lower locking hole 18e formed in the vertical piece portion 18a of the auxiliary frame member 18, which are arranged at substantially the same position in the front-rear, left-right directions. Furthermore, at the tip edge portion below the portion where the upper locking hole 14ba of the locking piece portion 14b is formed, a notch groove-shaped fitting recess 14bb that is notched in an inverted L shape and reaches the lower edge is formed. And a front side portion that is part of the adjustment portion 17c of the turnbuckle 17 assembled in the substantially vertical state is configured to be loosely fitted into the fitting recess 14bb. As a result, the turnbuckle 17 is configured such that the length can be freely adjusted by being able to turn the adjustment portion 17c while maintaining the substantially vertical state.

[0016] And in the shutter case 5 configured in this way, when the magsa frame member 11 receives its own weight and the central portion is deformed by bending downward, the turnbuckle 17 is adjusted to be reduced to correct the bending deformation. This correction of the bending deformation is configured to be executed by lifting an auxiliary frame member 18 that is connected to the magsa frame member 11 but not connected to the front lower frame member 9. Incidentally, when the turnbuckle 17 is reduced to correct the bending deformation of the magsa frame member 11, the correction of the bending of the magsa frame member 11 is such that the front edge 18d side where the turnbuckle 17 of the auxiliary frame member 18 is locked is lifted with respect to the rear edge side connected to the magsa frame member 17, and the correction is in a state where the auxiliary frame member 18 is inclined. However, this inclination of the auxiliary frame member 18 does not cause a problem in terms of function.

[0017] In the present embodiment configured as described, the magsa frame member 11 that constitutes the magsa portion M which is the entrance of the shutter curtain 3 in the shutter case 5 is corrected for deflection caused by receiving its own weight by using a turnbuckle 17 as a deflection correction means. In this case, the turnbuckle 17 corrects the deflection of the magsa frame member 11 by being reduced and adjusted in a state where the lower locking portion 17b is locked to the auxiliary frame member 18 whose rear edge is connected to the magsa frame member 11. However, since the front edge 18d of the auxiliary frame member 18 is in a free end state where it can move up and down without being connected to the front lower frame member 9, the upward movement of the auxiliary frame member 18 due to the reduction adjustment of the turnbuckle 17 for correcting the deflection of the magsa frame member 11 is executed as a free upward movement not involving the front lower frame member, and the deflection of the magsa frame member 11 can be corrected without deforming the front lower frame member 9.

[0018] Moreover, in this case, since the upper locking portion 17a of the turnbuckle 17 is locked to the first reinforcing frame member 14 provided between the front upper and front lower frame members 8 and 9, the turnbuckle 17 can be arranged on the front side close to the front upper and front lower frame members 8 and 9 without interfering with the shutter curtain 3 wound around the winding body 4 within the shutter case 5. And the first reinforcing frame member 14 is provided with a locking piece portion 14b to which the upper locking portion 17a of the turnbuckle 17 is locked. As a result of the locking piece portion 14b being provided in a state located behind the front edge 18d of the auxiliary frame member 18, the turnbuckle 17 can be attached in a substantially perpendicular state between the first reinforcing frame member 14 and the auxiliary frame member 18 without interfering with the connecting piece portion 14a and the front upper and front lower frame members 8 and 9. As a result, it is avoided that the correction force when the turnbuckle 17 is reduced and adjusted becomes a component force in the front-rear direction and is dispersed, and it effectively functions as a deflection correction force for the magsa frame member 11.

[0019] Moreover, as a result of the upper locking hole 14ba formed in the locking piece portion 14b for the upper locking portion 17a to lock being provided at a position behind the front edge 18d of the auxiliary frame member 18, the turnbuckle 17 in a substantially vertical state can be surely arranged without interfering with the connecting piece portion 14a and the front upper and front lower frame members 8 and 9. In this case, a part of the adjusting portion 17c of the turnbuckle 17 is fitted in a loose fit into the fitting recess 14bb formed in the locking piece portion 14b, so that the turnbuckle 17 in a substantially vertical state can be arranged without difficulty. And the fitting recess 14bb is formed in a notch groove shape below the upper locking hole 14ba formed in the locking piece portion 14b, and can be easily formed.

[0020] In this way, the deflection correction of the magsa frame member 11 can be achieved by reducing the adjustment of the turnbuckle 17 locked to the first reinforcing frame member 14 provided between the front upper and front lower frame members 8 and 9 without causing deformation of the front lower frame member 9. As a result of at least one second reinforcing frame member 15 being provided between the front upper and front lower frame members 8 and 9 with a gap in the left - right direction with respect to the first reinforcing frame member 14, the front side members of the shutter case 5 including the first reinforcing frame member 14 receiving the deflection correction force can be reinforced by the second reinforcing frame member 15. Moreover, as a result of the second reinforcing frame member 15 being provided in a symmetric state with a gap in the left - right direction with respect to the first reinforcing frame member 14, the front side members of the shutter case 5 can be reinforced in a balanced state in the left - right direction.

[0021] Of course, the present invention is not limited to the above - described embodiment. The turnbuckle 17 of the first embodiment is slightly inclined, but it can also be arranged vertically as in the second embodiment shown in FIG. 8. Furthermore, as the first reinforcing frame member (reinforcing frame member), as in the third embodiment shown in FIGS. 9 and 10, the first reinforcing frame member (reinforcing frame member) 24 may include horizontal plate-shaped upper and lower connecting piece portions 24a and 24b connected to the front upper and front lower frame members 8 and 9 via screws 16, and locking piece portions 24c which are finding pieces bent and formed on the rear side of the front end edges 18d of the auxiliary frame members 18 of the connecting piece portions 24a and 24b. An upper locking hole 24ca for locking the upper locking portion 17a of the turnbuckle 17 and a fitting recess 24cb into which the adjusting portion 17c of the turnbuckle 17 is fitted may be formed in the locking piece portion 24c. In this case, as the first reinforcing frame member 24, as in the modified example shown in FIG. 11, side piece portions 24d in a state of connecting the upper and lower connecting piece portions 24a and 24b and the locking piece portions 24c may be provided. In this case, the strength of the first reinforcing frame member 24 can be increased. And regarding the shape of the first reinforcing frame member for carrying out the present invention in this way, as long as it satisfies the shape described in the claims, it goes without saying that it is not limited to those of the above embodiments.

[0022] Also, regarding the upper locking portion of the deflection correction means employed in the present invention, in the above embodiments, it is configured to lock to the first reinforcing frame members 14 and 24 connected to the front upper and front lower frame members 8 and 9. However, as described in Patent Documents 1 and 3, when an upper reinforcing frame member is provided between the front upper frame member and the rear upper frame member, it may of course be locked to the upper reinforcing frame member. Furthermore, as a second reinforcing frame member is provided to reinforce the front side member including the first reinforcing frame member of the shutter curtain, the number of the second reinforcing frame members may be one or more. Furthermore, it is preferable that the deflection correction means is attached in a substantially vertical state in that no component force in the front-rear direction is generated. However, the present invention can be implemented even if it is in an inclined posture when necessary.

Industrial Applicability

[0023] The present invention can be used as a shutter case structure in a building shutter device installed at an opening such as an entrance of a building such as a building or a house.

Explanation of Signs

[0024] 1 Shutter device 2 Guide rail 3 Shutter curtain 4 Winding body 5 Shutter case 7 Bracket 8 Front upper frame member 9 Front lower frame member 9a Upper side piece part 9b Rear side piece part 11 Magusa frame member 11a Upper piece part 11b Front side piece part 12 Case plate 13 Guide roller 14 First reinforcing frame member (reinforcing frame member) 14a Connecting piece part 14b Locking piece part 14ba Upper side locking hole 14bb Insertion recess 15 Second reinforcing frame member 17 Turnbuckle (flexure correction means) 17a Upper side locking part 17b Lower side locking part 17c Adjusting part 18 Auxiliary frame member 18c Mounting piece part 18d Front end edge 18e Lower side locking hole E Opening M Magusa part

Claims

1. In a building shutter device comprising guide rails provided on the left and right sides of an opening such as an entrance of a building, a shutter curtain that is guided to open and close along the guide rails, a winding body that winds the shutter curtain, and a shutter case that covers the winding body, the shutter case is formed of a frame including at least left and right brackets supported on the body side, upper front and lower front frame members provided between the front edge portions of the left and right brackets, and a magsa frame member provided at the insertion opening of the shutter curtain. In configuring the shutter case to be provided with length-adjustable deflection correction means having upper and lower locking portions and an intermediate adjustment portion for correcting deflection caused by receiving the self-weight of the magsa frame member, an auxiliary frame member having a rear edge integrally connected to the magsa frame member and having a lower locking portion of the deflection correction means locked thereto is in a free end state in which the front edge of the auxiliary frame member is vertically movable relative to the lower front frame member and is not connected. The upward movement of the auxiliary frame member for correcting the deflection of the magsa frame member accompanying the reduction adjustment of the deflection correction means is executed in a state of moving upward relative to the lower front frame member. A shutter case structure in a building shutter device is characterized by this configuration.

2. A reinforcing frame member is provided between the upper front and lower front frame members. The deflection correction means is characterized in that the upper locking portion is locked to the reinforcing frame member. A shutter case structure in the building shutter device according to Claim 1.

3. The reinforcing frame member is configured to include a connecting piece portion connected to the upper front and lower front frame members and a locking piece portion provided in a position behind the front edge of the auxiliary frame member. The upper locking portion is locked to the locking piece portion. A shutter case structure in the building shutter device according to Claim 2.

4. The deflection correction means is attached in a substantially vertical state between the reinforcing frame member and the auxiliary frame member. A shutter case structure in the building shutter device according to Claim 2.

5. The locking piece portion is characterized in that a locking receiving portion for locking the upper locking portion is formed at a position behind the front edge of the auxiliary frame member. A shutter case structure in the building shutter device according to Claim 3 or 4.

6. The locking piece portion is characterized in that an insertion recess into which at least a part of the adjustment portion of the deflection correction means in a substantially vertical state is inserted is formed. A shutter case structure in the building shutter device according to Claim 4.

7. The shutter case structure in the building shutter device according to claim 6, wherein the embedding recess is formed in a notch groove shape below the locking receiving portion of the locking piece portion.

8. The reinforcing frame member is a first reinforcing frame member, and at least one second reinforcing frame member is provided between the upper front and lower front frame members with a gap in the left-right direction with respect to the first reinforcing frame member. The shutter case structure in the building shutter device according to claim 2, characterized in that.

9. The first reinforcing frame member is provided at the center portion in the left-right direction of the shutter case, and at least a pair of second reinforcing frame members are provided with a gap in the left-right direction with respect to the first reinforcing frame member. The shutter case structure in the building shutter device according to claim 8, characterized in that.

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