Bracket mounting auxiliary tool and method of mounting bracket for opening / closing device

Abstract

To provide a bracket mounting auxiliary tool and a mounting method using the same which are capable of realizing construction without fire, and easily and safely mounting the bracket.SOLUTION: A bracket mounting auxiliary tool 13 to be mounted together with a bracket 15 for an opening / closing device, the bracket 15 including a bracket body 35 for supporting a shaft 25 of a winding body, a plate 27 to which the bracket body 35 is welded for fixture, and a first fastening member 49 which is inserted into a fixing hole 47 bored in the plate 27 and fastened for fixture to mounting bases 21, 23 above an opening, the bracket mounting auxiliary tool 13 being is lightweight, being interposed between the plate 27 and a mounting base, and being provided with a reference line 55 attached to a surface 60, a fastening hole 57 for inserting and fixing a second fastening member 67 into the mounting base, and a co-fastening hole 53 through which the first fastening member 49 inserted into the fixing hole 47 of the plate 27 bored at the same position as the fixing hole 47 and stacked is passed and co-fastened to a prepared hole 51 of the mounting base.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a bracket mounting auxiliary tool and a mounting method for a switchgear bracket using the auxiliary tool. [Background technology]

[0002] The brackets that support both ends of the shutter winding shaft are fixed to the building structure. In this case, the brackets are fixed across a pair of frame-shaped horizontal members called upper and lower mounting bases, which are structural members of the building structure. Since the brackets support the entire weight of the shutter curtain, they are firmly fixed to the building structure. The thickness and fixing structure of the brackets are changed according to the size (width and height) of the shutter curtain, the weight of the shutter curtain, and the diameter of the winding shaft that winds up the shutter curtain. Conventionally, the brackets were fixed by welding. The brackets have a rectangular fixing base at their base end that is parallel to the building structure, and this fixing base is welded and fixed to the mounting base. If the shutter curtain is not heavy, the fixing base is directly welded to the upper and lower mounting bases, but if it is heavy, a plate is welded and fixed to the bracket, and this plate is welded and fixed to the mounting base.

[0003] In addition, the upper and lower mounting bases have a predetermined distance between them as part of the building frame structure, but this does not necessarily match the vertical width of the shutter device (opening and closing device). For this reason, a vertical plate is welded and fixed across a pair of upper and lower horizontal mounting bases.

[0004] On the other hand, there are requests not to use firearms during welding work etc. Also, welding work that requires supporting the bracket and maintaining its mounting position is dangerous work at high altitudes.

[0005] Therefore, there is an installation method and construction structure in which the plate fixed to the bracket is fixed to the mounting base with screw members such as bolts and nuts, rather than being welded. In this case, the plate is welded to the bracket in advance in the factory. This allows the plate to be fastened to the mounting base with bolts, etc. at the site. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2022-156562 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, since the bracket supports the entire weight of the shutter curtain, it is firmly fixed to the building frame, and is made of a steel plate with sufficient thickness, weighing about 20 to 30 kg. To fix this bracket to the mounting base, the bracket's plate surface is aligned with a level (laser, etc.) so that it is vertical and horizontal on both sides. At that time, the bracket is heavy, and it is difficult for the worker to continue supporting it by hand. Therefore, the worker lifts the bracket and clamps it in a vice to temporarily fix it to the mounting base. While the bracket is clamped in the vice, the bracket is hit with a hammer or the like to adjust it little by little to correct the horizontal and vertical. Fine adjustments while hitting the bracket temporarily fixed in the vice with a hammer or the like are not only difficult to fix firmly, but also dangerous because it is a high-altitude work, and since it is overhead, there is a risk of other danger if the bracket falls. After the adjustment, the bracket is fixed to the mounting base.

[0008] The present invention has been made in consideration of the above-mentioned situation, and its object is to provide a bracket mounting auxiliary tool that enables brackets to be mounted easily and safely while realizing construction without fire, and a mounting method for opening and closing device brackets using this auxiliary tool. [Means for solving the problem]

[0009] Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The bracket mounting auxiliary tool 13 according to claim 1 of the present invention is a bracket mounting auxiliary tool 13 that is attached together with a bracket 15 of a switching device when the bracket 15 is attached to a building frame, and The bracket 15 is A bracket body 35 supports shafts 25 protruding from both left and right ends of a winding body that winds up the opening / closing body 17; a plate 27 whose back surface faces a pair of upper and lower mounting bases 21, 23 arranged above the opening in the building structure, and whose front surface 28 is welded to the bracket body 35; A first fastening member 49 is inserted into a plurality of fastening holes 47 formed at least in the upper part of the plate 27 to fasten the plate 27 to the mounting base 21 (23); It is equipped with The bracket mounting aid 13 is The bracket 15 is lighter than the bracket 15 and is interposed between the rear surface of the plate 27 and the mounting surface 37 of the mounting base 21, 23. Horizontal and vertical reference lines 55 on the surface 60; A plurality of fastening holes 57 for inserting and fastening a second fastening member 67 to the mounting base 21, 23; a co-fastening hole 53 through which the first fastening member 49 penetrates and is fastened together with the plate 27 to a pilot hole 51 of the mounting base 21 (23), the first fastening member 49 being inserted into the fixing hole 47 of the plate 27 that is drilled at the same position as the fixing hole 47 and placed on the surface 60; The present invention is characterized by comprising:

[0010] In this bracket mounting auxiliary tool 13, the auxiliary tool body 59 is formed of, for example, a steel plate thinner than the plate 27. Therefore, the bracket mounting auxiliary tool 13 is lighter and easier to handle than the bracket 15 in which the bracket body 35 and the thick plate 27 are fixed by welding. This bracket mounting auxiliary tool 13 is provided with a straight reference line 55 indicating horizontal and vertical, a fastening hole 57 for pre-attachment, and a co-fastening hole 53 for co-fastening with the plate 27. The bracket mounting auxiliary tool 13 can be aligned with the horizontal and vertical indicated by the level using the reference line 55, allowing the auxiliary tool body 59 to be positioned with high precision. The positioned bracket mounting auxiliary tool 13 is supported by hand or temporarily fixed in a vice, and the second fastening members (drill screws, etc.) 67 are inserted into the fastening holes 57, and the bracket mounting auxiliary tool 13 is fastened (pre-attached) to the mounting bases 21, 23 while remaining in the positioned position. These operations can be easily performed because the bracket mounting auxiliary tool 13 is lightweight. The bracket mounting auxiliary tool 13 pre-attached to the mounting bases 21, 23 has a co-tightening hole 53 with a larger diameter than the fastening hole 57 drilled at a predetermined position. The mounting bases 21, 23 do not have holes at the positions of the co-tightening holes 53. In other words, the bracket mounting auxiliary tool 13 also serves as a jig (template) that indicates the positions of the pilot holes 51 to be drilled in the mounting bases 21, 23 using the co-tightening holes 53 of the bracket mounting auxiliary tool 13 pre-attached. This makes it possible to drill the pilot holes 51, which are through holes, with high accuracy and easily in the mounting bases 21, 23 using the co-tightening holes 53 of the bracket mounting auxiliary tool 13 pre-attached. Pilot holes 51 drilled with high precision using bracket mounting auxiliary tool 13 match with fixing holes 47 in bracket 15 that is placed on surface 60 of bracket mounting auxiliary tool 13. In other words, bracket mounting auxiliary tool 13 easily completes the series of steps that previously required clamping a heavy bracket in a vice, hitting it with a hammer to align it, and then drilling pilot holes using the fixing holes drilled in the plate. Bracket 15 is fastened to pilot hole 51 by aligning fixing hole 47 with co-tightening hole 53 and passing first fastening member 49 through fixing hole 47 and co-tightening hole 53. Alternatively, first fastening member 49 is inserted into fixing hole 47 in advance and passed through co-tightening hole 53 and pilot hole 51 to be fastened (co-tightened). This makes it possible to complete fastening (co-tightening) of bracket 15 with support for a short period of time. Of course, a vice may be used for the support work, but this does not require work such as hitting the bracket with a hammer to position it, as in the past.

[0011] The bracket mounting aid 13 according to claim 2 of the present invention is the bracket mounting aid 13 according to claim 1, The bracket mounting auxiliary tool 13 is characterized in that a support piece 69 for supporting a lower edge 68 of the plate 27 is provided at the lower edge of the bracket mounting auxiliary tool 13 .

[0012] In this bracket mounting auxiliary tool 13, a mounting piece 69 on which a lower edge 68 of the plate 27 is placed is provided on the lower edge of the bracket mounting auxiliary tool 13. When the bracket 15 is fastened together with the mounting bases 21, 23 by sandwiching the bracket mounting auxiliary tool 13, a task is required in which the first fastening member 49 inserted through the fixing hole 47 is inserted into the fastening hole 53 and the pilot hole 51 while supporting the bracket 15 with one hand. When this fastening together process is performed by one person, a work step arises in which the entire weight of the bracket 15 must be supported by hand. In contrast, the bracket mounting aid 13 is provided with a mounting piece 69 on which the lower edge 68 of the plate 27 is placed, so that the bracket 15 can be temporarily placed on the mounting piece 69. In other words, it is no longer necessary to support the entire weight of the bracket 15 with one hand. The force required to support the bracket 15 with one hand is small enough to prevent the bracket 15 from falling over, so the work of inserting the first fastening member 49 and the work of fastening the first fastening member 49 can be easily performed.

[0013] The bracket mounting aid 13 according to claim 3 of the present invention is the bracket mounting aid 13 according to claim 1, The bracket mounting auxiliary tool 13 is characterized in that an upper edge insertion groove 71 for inserting an upper edge 72 of the plate 27 is provided at the upper edge of the bracket mounting auxiliary tool 13, and a lower edge insertion groove 73 for inserting a lower edge 68 of the plate 27 is provided opposite the upper edge insertion groove 71 at the lower edge of the bracket mounting auxiliary tool 13.

[0014] In this bracket mounting auxiliary tool 13, an upper edge insertion groove 71 into which an upper edge 72 of a plate 27 is inserted and a lower edge insertion groove 73 into which a lower edge 68 of the plate 27 is inserted are provided in opposition to each other. As a result, the plate 27 is temporarily fixed to the bracket mounting auxiliary tool 13 by being supported by the upper edge 72 and the lower edge 68. In particular, by configuring the upper edge insertion groove 71 and the lower edge insertion groove 73 so that the lower edge insertion groove 73 is shallower than the upper edge insertion groove 71, the plate 27 can have a Kendon-type mounting structure. In the Kendon-type plate 27, the upper edge 72 of the plate 27 is lifted up to the bottom of the upper edge insertion groove 71 and inserted, positioned above the lower edge insertion groove 73, and the lower edge 68 of the plate 27 is dropped into the lower edge insertion groove 73, whereby the upper and lower edges 72, 68 are temporarily fixed to the mounting bases 21, 23 via the bracket mounting auxiliary tool 13. As a result, after the bracket 15 is temporarily fixed, it is possible to perform the alignment work between the fixing hole 47 of the bracket 15 and the co-tightening hole 53 of the bracket mounting aid 13 without using one's hands, and the co-tightening work of passing the first fastening member 49 through the fixing hole 47 and the co-tightening hole 53 and fixing it to the pilot hole 51.

[0015] The bracket mounting aid 13 according to claim 4 of the present invention is the bracket mounting aid according to claim 3, The upper edge insertion groove 71 and the lower edge insertion groove 73 are characterized in that they are formed by bending the upper and lower edges of the bracket mounting auxiliary tool 13.

[0016] In this bracket mounting aid 13, the upper edge insertion groove 71 and the lower edge insertion groove 73 can be obtained by bending the upper and lower edges of the bracket mounting aid 13, and for example, if the bracket mounting aid 13 itself is made of a thin iron plate or the like, the upper edge insertion groove 71 and the lower edge insertion groove 73 can be easily obtained by bending, and a support structure for the upper edge 72 and the lower edge 68 of the plate 27, i.e., a structure to prevent the plate 27 from falling off, can be obtained by a simple top and bottom fold. Furthermore, a Kendon-type mounting structure can be obtained as described above.

[0017] The bracket mounting aid 13 according to claim 5 of the present invention is the bracket mounting aid according to claim 3 or 4, The upper edge insertion groove 71 is characterized in that the groove width a is wider than the groove width b of the lower edge insertion groove 73 (a>b).

[0018] In this bracket mounting auxiliary tool 13, by forming the groove width a of the upper edge insertion groove 71 to be wider than the groove width b of the lower edge insertion groove 73 (a>b), the upper edge insertion groove 71 has a dimension with some play, and when inserting the upper edge 72 of the plate 27, the plate 27 can be tilted and inserted from diagonally below, that is, the Kendon-type mounting procedure can be easily performed, and the plate 27 can be assembled to the bracket mounting auxiliary tool 13. Then, by inserting the upper edge 72 of the plate 27 so as to be lifted into the upper edge insertion groove 71 and then dropping the lower edge 68 into the lower edge insertion groove 73, it becomes possible to temporarily fasten the plate to the mounting bases 21, 23 via this bracket mounting auxiliary tool 13.

[0019] The bracket mounting aid 13 according to claim 6 of the present invention is a bracket mounting aid 13 according to any one of claims 1 to 4, The bracket mounting auxiliary tool 13 is characterized in that a handle portion 61 is formed on at least one of the left and right edges.

[0020] In this bracket mounting auxiliary tool 13, a handle portion 61 is formed on at least one of the left and right edges of the bracket mounting auxiliary tool 13. The handle portion 61 is, for example, a recessed portion formed by cutting out a vertical edge. If the bracket mounting auxiliary tool 13 is made light by, for example, making the plate thickness of the plate material thin, it may be difficult to grasp and handle. The bracket mounting auxiliary tool 13 can be contacted by fingers in multiple directions by providing the handle portion 61 having a recessed shape on at least one of the left and right vertical edges, preferably on the left and right vertical edges. That is, the handle portion 61 makes the bracket mounting auxiliary tool 13 easy to handle. This improves the holdability of the bracket mounting auxiliary tool 13 when it is simply held, when it is pressed against the vertical mounting surface 37 of the mounting base 21, 23 while being held in that position, and when it is moved along the mounting surface 37 to adjust the position.

[0021] The bracket mounting aid 13 according to claim 7 of the present invention is the bracket mounting aid 13 according to claim 5, The bracket mounting auxiliary tool 13 is characterized in that a handle portion 61 is formed on at least one of the left and right edges.

[0022] The function of this bracket mounting aid 13 is the same as that of claim 6.

[0023] The mounting method of the bracket for a switching device using the bracket mounting auxiliary tool 13 according to claim 8 of the present invention is as follows: A method for mounting a bracket for a switchgear to a building structure, comprising the steps of: a positioning step of positioning a bracket mounting auxiliary tool 13, which is lighter than the bracket 15, on a pair of upper and lower mounting bases 21, 23 arranged above the opening in the building structure by aligning a horizontal and vertical reference line 55 on a surface 60 with the horizontal and vertical of a level; an auxiliary tool mounting process for fastening and fixing the bracket mounting auxiliary tool 13 to the mounting bases 21 and 23 with second fastening members 67 inserted into a plurality of fastening holes 57 formed in the bracket mounting auxiliary tool 13; a pilot hole drilling step of drilling pilot holes 51 in the mounting bases 21, 23 using common fastening holes 53 drilled in advance in the bracket mounting auxiliary tool 13; a co-fastening process in which a plate 27 to which a bracket body 35 is welded and fixed is placed on a surface 60 of the bracket mounting auxiliary tool 13, and a first fastening member 49 is inserted into a fixing hole 47 drilled in the plate 27 and passes through a co-fastening hole 53 and the pilot hole 51 of the bracket mounting auxiliary tool 13 to fasten the first fastening member 49 to the mounting bases 21 and 23; The present invention is characterized by comprising:

[0024] In the method of mounting a switchgear bracket using this bracket mounting auxiliary tool 13, first, in a positioning step, the bracket mounting auxiliary tool 13 is positioned with high precision by aligning the reference line 55 with the horizontal and vertical of a level. In an auxiliary tool mounting step, the bracket mounting auxiliary tool 13 is fixed to the mounting bases 21, 23 with the second fastening members 67 inserted into the fastening holes 57 while remaining in the positioned position. In a pilot hole drilling step, pilot holes 51 are drilled in the mounting bases 21, 23 using the co-fastening holes 53 of the fixed bracket mounting auxiliary tool 13. Finally, in a co-fastening step, the first fastening members 49 are inserted into the fixing holes 47 of the plate 27 to which the bracket body 35 is previously welded and fixed, onto the surface 60 of the temporarily fixed bracket mounting auxiliary tool 13. The inserted first fastening member 49 passes through the fixing hole 47 of the plate 27 and the co-fastening hole 53 of the bracket mounting aid 13 and is fastened to the pilot hole 51 of the mounting bases 21, 23, thereby completing the fixation of the bracket 15 to the mounting bases 21, 23. In the method of mounting a switchgear bracket using this bracket mounting auxiliary tool 13, the lightweight bracket mounting auxiliary tool 13 is pre-attached with high precision and ease using the reference line 55 attached to the auxiliary tool itself. In addition, by using the pre-attached common fastening hole 53 of the bracket mounting auxiliary tool 13, it is possible to drill the pilot hole 51 into the mounting bases 21, 23 with high precision and ease without requiring a vice or the like. Bracket 15 is fastened to pilot hole 51 by aligning fixing hole 47 with co-tightening hole 53 and passing first fastening member 49 through fixing hole 47 and co-tightening hole 53. Alternatively, first fastening member 49 is inserted into fixing hole 47 in advance and passed through co-tightening hole 53 and pilot hole 51 to be fastened (co-tightened). This makes it possible to complete fastening (co-tightening) of bracket 15 with support for a short period of time. Of course, a vice may be used for the support work, but this does not require work such as hitting the bracket with a hammer to position it, as in the past.

[0025] A method for mounting a switchgear bracket using the bracket mounting auxiliary tool 13 according to claim 9 of the present invention is a method for mounting a switchgear bracket according to claim 8, The co-tightening process includes: The method is characterized by including a step of placing the lower edge 68 of the plate 27 on a placement piece 69 provided on the lower edge of the bracket mounting auxiliary tool 13.

[0026] In the method for mounting a bracket for a switchgear using this bracket mounting auxiliary tool 13, even when the co-tightening process is performed by one person, the lower edge 68 of the plate 27 can be placed on the mounting piece 69 of the bracket mounting auxiliary tool 13 and temporarily placed. In other words, it is no longer necessary to support the entire weight of the bracket 15 with one hand. The force required for support with one hand is small enough to prevent the bracket 15 placed on the mounting piece 69 of the bracket mounting auxiliary tool 13 from falling over, so there is no need to constantly support the weight of the bracket 15 during co-tightening, and the work of inserting the first fastening member 49 and the work of fastening the first fastening member 49 can be easily performed.

[0027] A method for mounting a switchgear bracket using the bracket mounting auxiliary tool 13 according to claim 10 of the present invention is the method for mounting a switchgear bracket according to claim 8, The co-tightening process includes: The method includes a step of inserting an upper edge 72 of the plate 27 into an upper edge insertion groove 71 provided on the upper edge of the bracket mounting auxiliary tool 13, and inserting a lower edge 68 of the plate 27 into a lower edge insertion groove 73 provided on the lower edge of the bracket mounting auxiliary tool 13, thereby holding the plate 27 on the bracket mounting auxiliary tool 13.

[0028] In the mounting method of the switchgear bracket using this bracket mounting auxiliary tool 13, the upper edge 72 and the lower edge 68 of the plate 27 can be inserted and held in the upper edge insertion groove 71 and the lower edge insertion groove 73 arranged opposite to each other in the bracket mounting auxiliary tool 13, and the upper edge insertion groove 71 and the lower edge insertion groove 73 can be configured to be shallow, for example, so that a Kendon-type mounting structure can be achieved. As a result, the Kendon-type plate 27 is formed by lifting the upper edge 72 of the plate 27 up to the bottom of the upper edge insertion groove 71 and inserting it, and dropping the lower edge 68 of the plate 27 positioned above the lower edge insertion groove 73 into the lower edge insertion groove 73, so that the upper and lower edges 72, 68 are supported by the bracket mounting auxiliary tool 13 and temporarily fixed to the mounting bases 21, 23 via the bracket mounting auxiliary tool 13. In other words, after the bracket 15 is temporarily fixed, it is not necessary to support its weight all the time without using one's hands, and it is possible to perform the alignment work between the fixing hole 47 of the bracket 15 and the co-tightening hole 53 of the bracket mounting aid 13, and the co-tightening work of passing the first fastening member through the fixing hole 47 and the co-tightening hole 53 and fixing it to the pilot hole 51.

[0029] A method for mounting a switchgear bracket using the bracket mounting auxiliary tool 13 according to claim 11 of the present invention is the method for mounting a switchgear bracket according to claim 8, The co-tightening process includes: The method includes a step of holding the plate 27 in the bracket mounting auxiliary tool 13 in a Kendon style with an upper edge insertion groove 71 provided on the upper edge of the bracket mounting auxiliary tool 13 and a lower edge insertion groove 73 provided on the lower edge of the bracket mounting auxiliary tool 13 and facing the upper edge insertion groove 71.

[0030] In the mounting method of the opening and closing device bracket using the bracket mounting auxiliary tool 13, the upper edge 72 and the lower edge 68 of the plate 27 are assembled in the upper edge insertion groove 71 and the lower edge insertion groove 73 of the bracket mounting auxiliary tool 13 in a Kendon manner, so that the plate 27 can be mounted from the front (mounting surface 37) of the mounting base 21, 23 via the bracket mounting auxiliary tool 13. This makes it possible to mount the plate 27, i.e., the bracket 15, to the mounting base 21, 23 without the need to prepare a space of the same width as the plate 27 on the side, for example, by sliding the plate 27 from the longitudinal end of the grooves (upper edge insertion groove 71, lower edge insertion groove 73). In addition, the upper edge 72 and the lower edge 68 of the plate 27 are held by the upper edge insertion groove 71 and the lower edge insertion groove 73, so that the bracket 15 is prevented from falling. Effect of the Invention

[0031] According to the bracket mounting auxiliary device of claim 1 of the present invention, the bracket mounting auxiliary device to be interposed between the plate of the bracket and the mounting base is formed to be lightweight, and this bracket mounting auxiliary device is provided with a reference line, a fastening hole for pre-attachment, and a co-fastening hole for co-fastening with the plate. Therefore, the mounting position and fixing position can be determined before fixing the bracket to the mounting base, and it is also possible to indicate the position of co-fastening with the first fastening member, allowing the bracket to be mounted easily and safely while achieving construction without fire.

[0032] According to the bracket mounting auxiliary device of claim 2 of the present invention, a support piece for placing the lower edge of the plate is provided at the lower edge of the bracket mounting auxiliary device. Therefore, when mounting the bracket, the plate of the bracket can be placed on the support piece and supported, eliminating the need to support the entire weight of the bracket by hand. It is possible to easily and safely align the fixing hole of the bracket with the co-tightening hole of the bracket mounting auxiliary device, and to pass the first fastening member through the fixing hole and the co-tightening hole and fix it to the pilot hole.

[0033] According to the bracket mounting auxiliary device of claim 3 of the present invention, an upper edge insertion groove is formed on the upper edge of the bracket mounting auxiliary device, into which the upper edge of the plate is inserted, and a lower edge insertion groove is formed on the lower edge of the bracket mounting auxiliary device, into which the lower edge of the plate is inserted. The plate is supported by the upper edge insertion groove and the lower edge insertion groove. After attachment to each insertion groove, the bracket can be held on the bracket mounting auxiliary device without the need for hands. This makes it easier and safer to align the fixing hole of the bracket with the co-tightening hole of the bracket mounting auxiliary device, and to pass the first fastening member through the fixing hole and co-tightening hole and fix it to the pilot hole.

[0034] According to the bracket mounting aid of the present invention, the upper edge insertion groove and the lower edge insertion groove can be obtained by bending the upper edge and the lower edge of the bracket mounting aid, and for example, when the bracket mounting aid itself is made of a thin iron plate, the upper edge insertion groove and the lower edge insertion groove can be easily obtained by bending, and the support structure for the upper edge and the lower edge of the plate, that is, the structure to prevent the plate from falling can be obtained by a simple top and bottom fold shape. Furthermore, these upper edge insertion groove and lower edge insertion groove can be used as a Kendon-type mounting structure.

[0035] According to the bracket mounting auxiliary tool of the present invention, by forming the groove width of the upper edge insertion groove wider than the groove width of the lower edge insertion groove, the upper edge insertion groove has a dimension with some play, and when inserting the upper edge of the plate, the plate can be tilted and inserted from diagonally below, that is, the Kendon-type mounting procedure can be easily performed and the plate can be assembled to the bracket mounting auxiliary tool. Then, by inserting the upper edge of the plate into the upper edge insertion groove so as to lift it up, and then dropping the lower edge into the lower edge insertion groove, the plate can be temporarily fixed to the mounting base via this bracket mounting auxiliary tool.

[0036] According to the bracket mounting aid of claim 6 of the present invention, the bracket mounting aid has a handle portion in the shape of a recess formed by cutting out the vertical edges of the left and right edges, for example, which makes it possible to firmly grasp the bracket mounting aid made of a thin steel plate when holding it in the hand to position it, thereby improving the portability of the bracket mounting aid and making it less likely to slip and fall, thereby improving safety and workability.

[0037] According to the bracket mounting aid recited in claim 7 of the present invention, the same effect as that of claim 6 can be obtained.

[0038] According to the method for mounting a bracket for an opening and closing device as set forth in claim 8 of the present invention, a lightweight bracket mounting auxiliary tool with a reference line is aligned with the mounting base and pre-attached with the second fastening member, a pilot hole is drilled in the mounting base using the common fastening hole provided in this bracket mounting auxiliary tool, and the first fastening member inserted into the plate of the bracket is passed through the common fastening hole of the bracket mounting auxiliary tool and fastened and fixed together with the bracket mounting auxiliary tool to the pilot hole of the mounting base. Therefore, the bracket mounting auxiliary tool interposed between the bracket and the mounting base can precisely determine the mounting and fixing position of the bracket, and the bracket can be mounted easily and safely while realizing construction without fire.

[0039] According to the mounting method for a bracket for an opening and closing device as described in claim 9 of the present invention, the lower edge of the plate can be placed and supported on the mounting piece of the bracket mounting auxiliary device that has already been fixed to the mounting base, so that there is no need to support the entire weight of the bracket by hand, and the bracket positioning work, the positioning work between the fixing hole of the bracket and the co-fastening hole of the bracket mounting auxiliary device, and the co-fastening work of passing the first fastening member through the fixing hole and the co-fastening hole and fixing it to the pilot hole can be easily and safely performed.

[0040] According to the mounting method for a bracket for an opening and closing device as described in claim 10 of the present invention, the upper edge of the plate is inserted into the upper edge insertion groove formed in the upper edge of the bracket mounting auxiliary tool, and the lower edge of the plate is inserted into the lower edge insertion groove formed in the lower edge of the bracket mounting auxiliary tool. Therefore, the bracket is supported by the bracket mounting auxiliary tool and can be held on the bracket mounting auxiliary tool without the need for hands after mounting. This makes it easier and safer to align the fixing hole of the bracket with the co-tightening hole of the bracket mounting auxiliary tool and to pass the first fastening member through the fixing hole and the co-tightening hole to fix it in the pilot hole without having to worry about the heavy bracket dropping, etc.

[0041] According to the mounting method for a switchgear bracket of the present invention, the upper and lower edges of the plate are assembled in the upper and lower edge insertion grooves of the bracket mounting auxiliary in a Kendon style, so that the plate can be mounted from the front of the mounting base via the bracket mounting auxiliary. This makes it possible to mount the plate, i.e., the bracket, to the mounting base without the need to prepare a space of the same width as the plate on the side, for example, by sliding the plate from the longitudinal ends of the grooves (upper edge insertion groove, lower edge insertion groove). In addition, the upper and lower edges of the plate are held by the upper edge insertion groove and the lower edge insertion groove, so that the bracket is prevented from falling. [Brief description of the drawings]

[0042] [Figure 1] FIG. 1 is an overall perspective view showing a heavy-duty shutter device equipped with a bracket mounting auxiliary tool according to an embodiment of the present invention. [Diagram 2] FIG. 4 is an exploded perspective view of a main portion near the bracket mounting auxiliary tool. [Diagram 3] 1 is a side view of a bracket fixed to a mounting base by fastening a bracket mounting auxiliary tool together. FIG. [Figure 4] FIG. 2A is an exploded perspective view of a bracket mounting auxiliary tool before it is fixed to a mounting base, and FIG. 2B is a perspective view of the bracket mounting auxiliary tool after it has been fixed to the mounting base. [Diagram 5]FIG. 11 is a perspective view showing a pilot hole drilling step of drilling pilot holes in a mounting base. [Figure 6] 13 is a perspective view showing a co-tightening process of fastening a one-sided bolt passing through a fixing hole and a co-tightening hole into a pilot hole. FIG. [Figure 7] FIG. 13 is an exploded perspective view of a main portion near a bracket mounting auxiliary tool according to Modification 1 having a mounting piece. [Figure 8] 11 is a side view showing a mounting process using a bracket mounting auxiliary tool having a mounting piece according to Modification 1. FIG. [Figure 9] FIG. 11 is an exploded perspective view of a main portion of a bracket mounting aid according to a second modified example, which is provided with an upper edge insertion groove and a lower edge insertion groove. [Figure 10] 13(a), (b), and (c) are side views showing the procedure of a mounting process using a bracket mounting auxiliary tool having upper edge insertion grooves and lower edge insertion grooves according to Modification 2. FIG. [Figure 11] FIG. 13 is a perspective view showing a mounting structure of the bracket when the mounting base is a vertical base. [Figure 12] FIG. 12 is an exploded perspective view of FIG. [Figure 13] FIG. 12 is a plan view of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0043] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view showing a heavy-duty shutter device 11 equipped with a bracket mounting auxiliary tool according to this embodiment. The bracket mounting auxiliary tool 13 (see FIG. 2) according to this embodiment is attached together with the bracket 15 of the opening and closing device when the bracket 15 is attached to the building frame. In this embodiment, the opening and closing device is a heavy-duty shutter device 11. The shutter device 11 opens and closes an opening in the building frame by raising and lowering an opening and closing body 17. The opening and closing body 17 can be a typical shutter curtain made of multiple connected aluminum or steel slats, or it can be an opening and closing body made of a panel material or a resin sheet.

[0044] A pair of left and right guide rails 19 are provided on both sides of the width of the opening, extending vertically. The guide rails 19 have a guide groove with a U-shaped cross section, and the guide grooves sandwich both edges of the shutter curtain 17 to guide it up and down. A pair of parallel mounting bases, each of which is long and extends vertically across the width of the opening, are arranged above the opening. The mounting bases are fixed to the building frame by welding or the like, for example, with square pipes made of steel. In this embodiment, the mounting bases are made of an upper mounting base 21 on the upper level and a lower mounting base 23 on the lower level. Both ends of the mounting bases 21 and 23 in the longitudinal direction are at least up to a position where they intersect with an imaginary extension line extending upward from the guide rails 19.

[0045] The shutter device 11 has a take-up body (not shown) that takes up the shutter curtain 17. The take-up body has shafts 25 protruding from both the left and right ends supported rotatably by brackets 15. The bracket 15 has a fixed base fixed to a plate 27. The plate 27 is fixed across a pair of upper and lower mounting bases 21, 23. An opening / closing machine 29 having an electric motor is attached to one of the brackets 15. When the drive shaft of the opening / closing machine 29 is rotated, the shaft 25 is rotated by an endless chain or the like stretched between the drive shaft and the shaft 25 of the take-up body. As a result, the shutter curtain 17 is taken up from the opening or paid out to the opening.

[0046] The outer periphery of the shutter curtain 17 wound up on the roll is covered by a cover 31 provided, for example, on the mounting bases 21, 23. A plurality of frame members 33 formed in a U-shaped frame surrounding the cover 31 are fixed at predetermined intervals in the longitudinal direction of the roll to the mounting bases 21, 23. The bracket mounting auxiliary tool 13 according to this embodiment is attached together with the bracket 15 when the bracket 15 is attached to the building structure.

[0047] The mounting structure of the bracket 15 using the bracket mounting aid 13 will be described in more detail below.

[0048] FIG. 2 is an exploded perspective view of a main portion in the vicinity of the bracket mounting aid. The bracket 15 has a bracket body 35, a plate 27, and a first fastening member 49.

[0049] The bracket body 35 supports the shaft 25 protruding from both the left and right ends of the winding body that winds up the shutter curtain 17. The bracket body 35 is formed in a plate shape parallel to a vertical plane protruding toward the front side (lower left side in FIG. 2) from the mounting surface 37 of the mounting base 21, 23. A pair of brackets 15 is used on the left and right. An upper reinforcing edge 39 and a lower reinforcing edge 41 are formed on the upper and lower edges of the bracket body 35. The upper reinforcing edge 39 is formed by horizontally bending the upper edge of the bracket body 35 toward the outside opposite the winding body. The lower reinforcing edge 41 is formed by horizontally bending the lower edge of the bracket body 35 toward the outside opposite the winding body. The upper reinforcing edge 39 and the lower reinforcing edge 41 provide the bracket body 35 with rigidity, and the deformation strength against the load received from the shaft 25 is increased.

[0050] A fixed base 43 is formed at the base of the bracket body 35. The fixed base 43 is formed at the base of the bracket body 35 by bending the fixed base 43 into a rectangular shape parallel to the mounting surface 37. In this embodiment, the fixed base 43 is bent inward toward the winder, but the bending direction may be outward. The fixed base 43 is fixed to the plate 27 by welding in a factory or the like in advance.

[0051] The back surface of the plate 27 faces a pair of upper and lower mounting bases 21, 23 that are arranged above an opening in the building structure, and the bracket body 35 is welded and fixed to the front surface 28 of the plate 27. The plate 27 is formed as a vertically long rectangle whose length and width are sufficiently larger than the fixed base 43 to which it is welded. The plate 27 serves as the main structure for fixing the bracket body 35, which supports the load of the shutter curtain 17 and the roll-up body via the shaft 25, to the mounting bases 21, 23. For this reason, the bracket 15 is made of a high-strength steel plate, for example, with a thickness of 6 mm or more. The bracket 15, which includes the plate 27 as its main component, has an overall weight of several tens of kilograms.

[0052] FIG. 3 is a side view of bracket 15 fixed to mounting bases 21, 23 by fastening bracket mounting auxiliary tool 13 together. A bearing groove 45 is formed in the bracket body 35, which is cut from a vertical edge, which is the tip edge protruding toward the front face 28, to a midway position toward the plate 27. The shaft 25 is inserted into this bearing groove 45 from the front side, and the roll is supported by the bracket body 35. More specifically, a bearing (not shown) is fitted onto the shaft 25 inserted into the bearing groove 45, and the bearing is fixed to the outer surface of the bracket body 35, so that the shaft 25 is rotatably supported by the bracket body 35 via the bearing. As a result, the total weight of the roll with the shutter curtain 17 rolled up is supported by the pair of upper and lower mounting bases 21, 23 via the bracket body 35 and the plate 27.

[0053] Referring again to FIG. 2, the first fastening member 49 is inserted into a plurality of fastening holes 47 drilled in the plate 27 to fasten the plate 27 to the mounting bases 21 and 23. A plurality of fastening holes 47 are drilled at least in the upper part of the plate 27, and in this embodiment, the fastening holes 47 are drilled in the four corners of the plate 27, and the plate 27 is fastened to the upper mounting base 21 and the lower mounting base 23. When the mounting bases 21 and 23 are formed of, for example, square pipes, a one-sided bolt is used as the first fastening member 49 for fixing the plate 27. In this case, the plate 27 is drilled with the fastening hole 47, which is a through hole through which the one-sided bolt 49 is inserted. Meanwhile, the mounting bases 21 and 23 are drilled with a pilot hole 51 through which the one-sided bolt 49 is crimped and fixed. The fastening hole 47 drilled in the plate 27 is drilled in advance at a factory or the like. On the other hand, each pilot hole 51 of the mounting bases 21, 23 is drilled on site by aligning it with a co-tightening hole 53 (described later) of the bracket mounting auxiliary tool 13 on site.

[0054] The bracket mounting aid 13 has a reference line 55, a fastening hole 57, and a common fastening hole 53. In this embodiment, the bracket mounting aid 13 has handle portions 61 formed of recesses formed by cutting out vertical edges on the left and right edges of the aid body 59. The shape of the handle portion 61 is not limited to the rectangular recess shown in the figure, and may be formed, for example, in a U-shape or a W-shape, or as a convex portion instead of a concave portion, and may be formed only on one edge instead of on both the left and right edges, and is not a required configuration of the bracket mounting aid 13.

[0055] The bracket mounting auxiliary tool 13 is formed with an auxiliary tool body 59 that is lighter than the bracket 15. In order to form it lighter, for example, it is formed of the same steel material as the plate 27 but with a plate material that is thinner than the plate 27. The bracket 15 has a thickness that provides rigidity, such as 4.5 mm, 6 mm, or 9 mm. In contrast, the bracket mounting auxiliary tool 13 has a plate thickness of about 1.6 mm. Alternatively, the bracket mounting auxiliary tool 13 may be formed lighter by using a material lighter than the plate 27, for example a light alloy such as aluminum, or by forming multiple lightening portions in the same steel material and thickness as the plate 27.

[0056] The reference line 55 is attached to the surface 60 of the auxiliary tool main body 59. The reference line 55 is made up of a horizontal line portion 63 and a vertical line portion 65 that are perpendicular to each other. The bracket mounting auxiliary tool 13 is positioned by adjusting the position and attitude so that the horizontal line portion 63 and the vertical line portion 65 of the reference line 55 match the horizontal and vertical indications of a level (such as a laser). The reference line 55 is attached with its relative position to the co-tightening hole 53 positioned with high precision.

[0057] The fastening holes 57 are drilled in the four corners on the outer side than the fixing holes 47. The fastening holes 57 are through holes for inserting the second fastening members 57 into the mounting bases 21, 23 to fix the bracket mounting auxiliary tool 13. For example, a drill screw is used for the second fastening members 67 that are inserted into the fastening holes 57 and fixed to the mounting bases 21, 23. The second fastening members 67 only need to be able to withstand the weight of the bracket mounting auxiliary tool 13, so a general drill screw can be used. The drill screw 67 has a drill portion for drilling pilot holes integrally formed at the tip of the male thread portion. This allows the screw to be screwed in with a specified torque while cutting a thread, making it possible to fasten and fix the screw by working only on the screwing side.

[0058] The co-tightening holes 53 are drilled in the four corners of the auxiliary tool body 59 at positions inside the fastening holes 57. The co-tightening holes 53 are drilled in the same positions and with the same inner diameter as the fixing holes 47 drilled in the plate 27. The one-sided bolts 49 inserted into the fixing holes 47 of the plate 27 superimposed on the surface 60 of the bracket mounting auxiliary tool 13 pass through the co-tightening holes 53 and are co-tightened to the pilot holes 51 of the mounting bases 21, 23.

[0059] Next, a procedure for mounting a switchgear bracket using the bracket mounting aid 13 will be described.

[0060] FIG. 4(a) is an exploded perspective view of the bracket mounting aid 13 before it is fixed to the mounting bases 21 and 23, and FIG. 4(b) is a perspective view of the bracket mounting aid 13 after it has been fixed to the mounting bases 21 and 23. The method of mounting an opening and closing device bracket using the bracket mounting auxiliary tool 13 of this embodiment begins with a positioning step in which the lightweight bracket mounting auxiliary tool 13 is positioned on a pair of upper and lower mounting bases 21 and 23, which are placed above an opening in the building structure, by aligning the horizontal line portion 63 and vertical line portion 65 of the reference line 55 marked on the surface 60 with the horizontal and vertical of a spirit level, as shown in Figure 4(a).

[0061] 4(b), the bracket mounting auxiliary tool 13 is fastened to the mounting surfaces 37 of the upper mounting base 21 and the lower mounting base 23 by drill screws 67 inserted into a plurality of fastening holes 57 drilled in the bracket mounting auxiliary tool 13. This completes the pre-attachment of the bracket mounting auxiliary tool 13 with high precision.

[0062] FIG. 5 is a perspective view showing a pilot hole drilling step for drilling pilot holes 51 in a mounting base. Next, in the pilot hole drilling process, the co-tightening holes 53 pre-drilled in the bracket mounting aid 13 are used as a guide, i.e., a template, to drill pilot holes 51 into the mounting surfaces 37 of the upper mounting base 21 and the lower mounting base 23 using a tool such as an electric drill.

[0063] FIG. 6 is a perspective view showing a co-fastening step of fastening the one-side bolt 49, which has passed through the fixing hole 47 and the co-fastening hole 53, into the pilot hole 51. As shown in FIG. Next, in the co-tightening step, the plate 27 to which the bracket body 35 is welded and fixed is placed on the surface 60 of the bracket mounting aid 13. The bracket 15 has fixing holes 47 drilled in the four corners of the plate 27 aligned with the co-tightening holes 53 of the bracket mounting aid 13. The one-side bolt 49 is passed through the fixing hole 47 and the co-tightening hole 53, which are aligned coaxially, and is further inserted into the pilot hole 51 of the mounting surface 37, which is coaxial. In other words, the fixing hole 47, the fastening hole 57, and the pilot hole 51 are all coaxial holes that communicate with each other.

[0064] One-sided bolts 49, which have been inserted into pilot holes 51 after passing through fixing holes 47 and co-tightening holes 53, are fastened to front surface 28 of plate 27, thereby co-tightening plate 27 and bracket mounting aid 13 to mounting surface 37 of mounting bases 21, 23. By fastening one-sided bolts 49, which have been passed through, to pilot holes 51 at all fixing locations of fixing holes 47 and co-tightening holes 53, fixing of bracket 15 to mounting bases 21, 23 is completed.

[0065] Next, a method of mounting a bracket for a switching device using the bracket mounting auxiliary tool 13 according to the modified example will be described.

[0066] [Variation 1] FIG. 7 is an exploded perspective view of a main portion near a bracket mounting aid having a mounting piece 69 according to the first modified example. In the bracket mounting aid 13 according to the first modification, a mounting piece 69 on which the lower edge of the plate 27 is placed is provided on the lower edge of the bracket mounting aid 13. In this first modification, the lower edge of the bracket mounting aid 13 is bent to form the mounting piece 69. The mounting piece 69 is a horizontal piece that forms an L-shape in side view by bending the lower edge of the bracket mounting aid 13 at a right angle to the opposite side to the mounting surface 37. The mounting piece 69 is provided with a distance from the common fastening hole 53 set to match the length from the fixing hole 47 of the plate 27 to the lower edge 68 of the plate 27. The mounting piece 69 may be a piece that forms a U-shape in side view by further bending the tip side of the bent horizontal piece with a vertical piece. In this case, the lower edge of the plate 27 can be dropped into the U-shaped groove to make it difficult for the placed plate 27 to come off. Furthermore, the mounting piece 69 may be formed continuously on the lower edge of the bracket mounting aid 13, or may be formed intermittently in a plurality of pieces.

[0067] FIG. 8 is a side view showing a co-fastening process using a bracket mounting auxiliary tool 13 having a mounting piece 69 according to the first modification. In the mounting method using the bracket mounting auxiliary tool 13 equipped with the mounting piece 69, first, in the co-tightening step described above, the lower edge 68 of the plate 27 of the bracket 15 is placed on the mounting piece 69 formed on the lower edge of the bracket mounting auxiliary tool 13. This allows most of the load of the bracket 15 to be supported by the mounting piece 69. The force supporting the bracket 15 is sufficient to be a small force that stops the bracket 15 from tilting forward.

[0068] Next, the bracket 15, whose lower edge 68 is supported by the mounting piece 69, is rotated around the lower edge 68 as the center of rotation so that the upper edge is pressed against the mounting surface 37 of the upper mounting base 21. The bracket 15 is slid left and right on the mounting piece 69 so that the fixing holes 47 overlap with the co-tightening holes 53 of the bracket mounting aid 13 and the pilot holes 51 of the mounting surface 37, and the lateral position of the bracket 15 is finely adjusted. When the fixing holes 47 coincide with the co-tightening holes 53 and the pilot holes 51, the one-side bolts 49 are inserted through the fixing holes 47 to perform fastening. All of the fixing holes 47 are fixed to the pilot holes 51 with the one-side bolts 49, and the fixing of the bracket 15 is completed.

[0069] [Variation 2] FIG. 9 is an exploded perspective view of a main part of a bracket mounting aid 13 according to Modification 2, which is provided with an upper edge insertion groove 71 and a lower edge insertion groove 73. As shown in FIG. In the bracket mounting aid 13 according to the second modification, an upper edge insertion groove 71 into which the upper edge of the plate 27 is inserted is provided on the upper edge of the bracket mounting aid 13. Also, a lower edge insertion groove 73 into which the lower edge of the plate 27 is inserted is provided on the lower edge of the bracket mounting aid 13, facing the upper edge insertion groove 71. In this second modification, the upper edge insertion groove 71 and the lower edge insertion groove 73 are formed by bending the upper edge and the lower edge of the bracket mounting aid 13. Also, the lower edge insertion groove 73 is formed shallower than the upper edge insertion groove 71. The upper edge insertion groove 71 and the lower edge insertion groove 73 are formed by folding back folded pieces that are U-shaped in side view, for example, by bending the tip side of a horizontal piece obtained by folding the upper edge and the lower edge of the bracket mounting aid 13 with a vertical piece. The upper edge insertion groove 71 and the lower edge insertion groove 73 have U-shaped groove openings facing each other in side view.

[0070] FIG. 10 is a side view showing, in (a), (b), and (c), the procedure of the co-fastening process using a bracket mounting auxiliary tool 13 having an upper edge insertion groove 71 and a lower edge insertion groove 73 according to the second modification. In a mounting method using bracket mounting auxiliary tool 13 having upper edge insertion groove 71 and lower edge insertion groove 73, first, in the above-mentioned co-fastening step, as shown in Fig. 10(a), upper edge 27 of bracket 15 is inserted into upper edge insertion groove 71 to lift plate 27. As shown in Fig. 10(b), while pressing upper edge 72 of plate 27 into the groove bottom of upper edge insertion groove 71, lower edge 68 of plate 27 is rotated in a direction approaching bracket mounting auxiliary tool 13 with upper edge 72 as a fulcrum, and lower edge 68 of plate 27 is pressed against bracket mounting auxiliary tool 13.

[0071] As shown in FIG. 10(c), the plate 27 is lowered along the bracket mounting aid 13, and the lower edge 68 of the plate 27 is dropped into the lower edge insertion groove 73. As a result, the upper edge 72 and the lower edge 68 of the bracket 15 are held in the upper edge insertion groove 71 and the lower edge insertion groove 73, and the entire load is supported by the bracket mounting aid 13 without falling over. In other words, the bracket 15 can be released. Next, the bracket 15 is finely adjusted in the lateral position while sliding left and right along the lower edge insertion groove 73, and when the fixing hole 47 is aligned with the co-tightening hole 53 and the pilot hole 51, the one-side bolt 49 is inserted from the fixing hole 47 to perform fastening. All the fixing holes 47 are fixed to the pilot holes 51 with the one-side bolt 49, and the fixing of the bracket 15 is completed.

[0072] In addition, it is preferable that the upper edge insertion groove 71 and the lower edge insertion groove 73 of the bracket mounting auxiliary tool 13 are formed so that the groove width a of the upper edge insertion groove 71 is wider than the groove width b of the lower edge insertion groove 73 (a>b) as shown in Fig. 10(a). This gives the upper edge insertion groove 71 a dimension with some play (groove width a), and when inserting the upper edge 72 of the plate 27 in the procedure described with reference to Fig. 10(a) above, the plate 27 can be tilted and easily inserted from diagonally below, that is, the Kendon-type mounting procedure can be easily performed, and the plate 27 can be assembled to the bracket mounting auxiliary tool 13. Then, the upper edge 72 of the plate 27 is inserted so as to be lifted into the upper edge insertion groove 71 (see Fig. 10(b)), and then the lower edge 68 is dropped into the lower edge insertion groove 73 (see Fig. 10(c)), so that the plate 27 can be temporarily fixed to the mounting bases 21, 23 via the bracket mounting auxiliary tool 13, and the upper and lower insertion grooves 71, 73 prevent it from falling.

[0073] Next, the operation of the above-mentioned configuration will be described.

[0074] In the bracket mounting auxiliary tool 13 according to this embodiment, the auxiliary tool body 59 is formed of, for example, a steel plate thinner than the plate 27. Therefore, the bracket mounting auxiliary tool 13 is lighter than the bracket 15 in which the bracket body 35 and the thick plate 27 are fixed by welding, and is easier to handle. This bracket mounting auxiliary tool 13 is provided with a reference line 55 indicating horizontal and vertical, a fastening hole 57 for pre-attachment, and a co-fastening hole 53 for co-fastening with the plate 27.

[0075] The bracket mounting aid 13 can be positioned with high precision by aligning it with the horizontal and vertical indicated by a level using the reference line 55 on the surface 60. Once positioned, the bracket mounting aid 13 is fastened and fixed to the mounting bases 21, 23 in the positioned position by inserting drill screws 67 or the like into the fastening holes 57 while being supported by hand or temporarily fixed in a vice. These operations can be easily performed because the bracket mounting aid 13 is lightweight.

[0076] The bracket mounting auxiliary tool 13 fastened (pre-attached) to the mounting bases 21, 23 has a co-tightening hole 53 with a larger diameter than the fastening hole 57 drilled in advance at a predetermined position. The mounting bases 21, 23 do not have holes at the positions of the co-tightening holes 53. In other words, the bracket mounting auxiliary tool 13 also serves as a jig (template) that indicates the positions of the pilot holes 51 to be drilled in the mounting bases 21, 23 using the co-tightening holes 53 of the pre-attached bracket mounting auxiliary tool 13 as a guide to drill the pilot holes 51, which are through holes, with high accuracy and ease.

[0077] The pilot holes 51 drilled with high precision using the bracket mounting auxiliary tool 13 match the fixing holes 47 in the bracket 15 placed on the surface 60 of the bracket mounting auxiliary tool 13. In other words, the bracket mounting auxiliary tool 13 easily completes a series of complicated tasks that previously required clamping a heavy bracket in a vice, hitting it with a hammer to align it, and then drilling pilot holes using the fixing holes drilled in the plate.

[0078] The bracket 15 is fastened to the pilot hole 51 by aligning the fixing hole 47 with the co-tightening hole 53 and passing the one-side bolt 49 through the fixing hole 47 and the co-tightening hole 53. Alternatively, the one-side bolt 49 is fastened (co-tightened) by passing it through the co-tightening hole 53 and the pilot hole 51 after having been inserted into the fixing hole 47 in advance. This makes it possible to complete the fastening (co-tightening) of the bracket 15 with support for a short period of time. Of course, a vice may be used for the support work, but there is no need to perform any positioning work such as hitting with a hammer as in the past.

[0079] Furthermore, in this bracket mounting auxiliary tool 13, as in Modification 1, a placement piece 69 on which the lower edge of the plate 27 is placed may be formed on the lower edge of the bracket mounting auxiliary tool 13. When the bracket 15 is fastened together with the mounting bases 21, 23 by sandwiching the bracket mounting auxiliary tool 13, a task is required in which the one-side bolt 49 inserted through the fixing hole 47 is inserted into the fastening hole 53 and the pilot hole 51 while supporting the bracket 15 with one hand. When this fastening together process is performed by one person, a task arises in which the entire weight of the bracket 15 must be supported with one hand.

[0080] In contrast, the bracket mounting auxiliary tool 13 of the first modification is provided with a mounting piece 69 on which the lower edge 68 of the plate 27 is placed, so that the bracket 15 can be temporarily placed on the mounting piece 69. In other words, it is no longer necessary to support the entire weight of the bracket 15 with one hand. The force required for supporting with one hand is small enough to prevent the bracket 15 from falling over, so that the insertion and fastening of the one-side bolt 49 can be easily performed. Compared to the conventional work of lifting and supporting the bracket 15, which weighs several tens of kilograms, the work can be carried out with safety ensured. As a result, during the mounting work of the bracket 15, the plate 27 of the bracket 15 can be placed and supported on the mounting piece 69, and there is no need to support the entire weight of the bracket 15 with one hand. The work of aligning the fixing hole 47 of the bracket 15 with the co-tightening hole 53 of the bracket mounting auxiliary tool 13 and the co-tightening work of passing the one-side bolt 49 through the fixing hole 47 and the co-tightening hole 53 and fastening it to the pilot hole 51 can be easily and safely performed.

[0081] Also, as in the second modification, the bracket mounting auxiliary tool 13 may be formed with an upper edge insertion groove 71 into which the upper edge 72 of the plate 27 is inserted, and a lower edge insertion groove 73 shallower than the upper edge insertion groove 71 into which the lower edge 68 of the plate 27 is inserted. This allows the plate 27 to have a Kendon-type mounting structure. The Kendon-type plate 27 is formed by lifting the upper edge 72 of the plate 27 up to the bottom of the upper edge insertion groove 71 and inserting it, positioning it above the lower edge insertion groove 73, and dropping the lower edge 68 of the plate 27 into the lower edge insertion groove 73, whereby the upper and lower edges 72, 68 are temporarily fixed to the mounting bases 21, 23 via the bracket mounting auxiliary tool 13. Furthermore, if the upper edge insertion groove 71 and the lower edge insertion groove 73 facing each other above and below are formed with grooves of equal shapes, the upper and lower edges 72, 68 of the plate 27 can be inserted so as to slide the plate 27 from the outer side in the longitudinal direction of the upper and lower grooves 71, 73, and the plate 27 can be positioned on the surface 60 side of the bracket mounting auxiliary plate 13.

[0082] This allows the bracket 15 to be held by the bracket mounting auxiliary tool 13 without using hands after the temporary fastening, and allows the bracket 15 to be held by the bracket mounting auxiliary tool 13 without using hands after the temporary fastening, and allows the bracket 15 to be held by the bracket mounting auxiliary tool 13 without using hands after the temporary fastening, and allows the bracket 15 to be held by the bracket mounting auxiliary tool 13 without using hands after the temporary fastening, and allows the bracket 15 to be held by the bracket mounting auxiliary tool 13 without using hands, and allows the bracket 15 to be held by the bracket mounting auxiliary tool 13 without using hands after the temporary fastening, and allows the bracket 15 to be held by the bracket mounting auxiliary tool 13 without using hands, and allows the bracket 15 to be held by the bracket mounting auxiliary tool 13, and the bracket 15 to be held by the bracket mounting auxiliary tool 13.

[0083] Furthermore, in this bracket mounting aid 13, handle portions 61 are formed in a concave shape by cutting out the vertical edges on the left and right edges of the bracket mounting aid 13. For example, if the bracket mounting aid 13 is made thin and lightweight, it may be difficult to grip and handle. By providing the handle portions 61 on the left and right vertical edges of the bracket mounting aid 13, it becomes possible for the bracket mounting aid 13 to come into contact with fingers in multiple directions.

[0084] That is, the handle portion 61 makes the bracket mounting auxiliary tool 13 easy to handle. This improves the holdability of the bracket mounting auxiliary tool 13 when it is simply held, when it is pressed against the vertical mounting surface 37 of the mounting base 21, 23 and held in that position, and when it is slid along the mounting surface 37 to adjust the position. In particular, when the above-mentioned Kendon-type mounting structure is used, the bracket mounting auxiliary tool 13 can be easily held by gripping it at its side edge, and the handle portion 61 can be used to easily lift the bracket mounting auxiliary tool 13 into the upper edge insertion groove 71. As a result, when a thin steel plate is held by hand to position it, the handle portion 61 can be held firmly, and the bracket mounting auxiliary tool 13 is less likely to slip and fall.

[0085] In the mounting method of the switchgear bracket using the bracket mounting auxiliary tool 13 according to the present embodiment, first, in a positioning step, the bracket mounting auxiliary tool 13 is positioned with high precision by aligning the reference line 55 with the horizontal and vertical of the level. In an auxiliary tool mounting step, the bracket mounting auxiliary tool 13 is fixed to the mounting base 21, 23 with the drill screw 67 inserted into the fastening hole 57 while remaining in the positioned position. In a pilot hole drilling step, pilot holes 51 are drilled in the mounting base 21, 23 by utilizing the co-tightening holes 53 of the fixed bracket mounting auxiliary tool 13. Finally, in a co-tightening step, one-side bolts 49 are inserted into the fixing holes 47 at the four corners of the plate 27 to which the bracket body 35 is welded and fixed, on the surface 60 of the temporarily fixed bracket mounting auxiliary tool 13. The inserted one-side bolt 49 of the bracket 15 passes through the fixing hole 47 of the plate 27 and the co-tightening hole 53 of the bracket mounting aid 13, and is fastened to the pilot hole 51 of the mounting bases 21, 23. Since the positioning is done beforehand when the bracket mounting aid 13 is attached, the bracket 15 is properly attached by aligning the position of the fixing hole 47. This completes the fixing of the bracket 15 to the mounting bases 21, 23.

[0086] In the method of mounting a switchgear bracket using this bracket mounting auxiliary tool 13, the lightweight bracket mounting auxiliary tool 13 is pre-attached with high precision and ease using the reference line 55 attached to the bracket mounting auxiliary tool 13 itself. Also, using the pre-attached common fastening hole 53 of the bracket mounting auxiliary tool 13, it becomes possible to process the pilot hole 51 in the mounting base with high precision and ease without requiring a vice or the like.

[0087] The bracket 15 is fastened to the pilot hole 51 by aligning the fixing hole 47 with the co-tightening hole 53 and passing the one-side bolt 49 through the fixing hole 47 and the co-tightening hole 53. Alternatively, the one-side bolt 49 is fastened (co-tightened) by passing it through the co-tightening hole 53 and the pilot hole 51 after having been inserted into the fixing hole 47 in advance. This allows the bracket 15 to be fastened (co-tightened) with support for a short period of time. Of course, a vice may be used for the support work, but this does not require the conventional work of aligning the bracket while hitting it with a hammer.

[0088] In addition, in the mounting method of the opening and closing device bracket using the bracket mounting auxiliary tool 13 of the first modification, even when the co-tightening process is performed by one person, the lower edge 68 of the plate 27 can be placed on the mounting piece 69 of the bracket mounting auxiliary tool 13 and temporarily placed. That is, it is no longer necessary to support the entire weight of the bracket 15 with one hand. The force required for supporting with one hand is small enough to prevent the bracket 15 from falling over, so that the insertion work of the one-side bolt 49 and the fastening work of the one-side bolt 49 can be easily performed. As a result, it is no longer necessary to support the entire weight of the bracket 15 with one hand, and the co-tightening work of passing the one-side bolt 49 through the fixing hole 47 of the bracket 15 and the co-tightening hole 53 of the bracket mounting auxiliary tool 13 and fixing it to the pilot hole 51 can be easily and safely performed.

[0089] Furthermore, in the method for mounting a bracket for a switchgear using the bracket mounting auxiliary tool 13 of the second modification, a deep upper edge insertion groove 71 into which the upper edge 72 of the plate 27 is inserted and a shallow lower edge insertion groove 73 into which the lower edge 68 of the plate 27 is inserted are formed in the bracket mounting auxiliary tool 13, so that the plate 27 can have a Kendon-type mounting structure. As a result, the Kendon-type plate 27 has the upper edge 72 of the plate 27 raised up to the bottom of the upper edge insertion groove 71 and inserted, and the lower edge 68 of the plate 27 positioned above the lower edge insertion groove 73 is dropped into the lower edge insertion groove 73, so that the upper and lower edges are temporarily fixed to the mounting bases 21, 23 via the bracket mounting auxiliary tool 13.

[0090] That is, after the bracket 15 is temporarily fixed, the alignment work between the fixing hole 47 of the bracket 15 and the co-tightening hole 53 of the bracket mounting auxiliary tool 13 and the co-tightening work of passing the one-side bolt 49 through the fixing hole 47 and the co-tightening hole 53 and fixing it to the pilot hole 51 can be performed without using hands. As a result, after mounting, the bracket 15 can be held by the bracket mounting auxiliary tool 13 without using hands, and the alignment work between the fixing hole 47 of the bracket 15 and the co-tightening hole 53 of the bracket mounting auxiliary tool 13 and the co-tightening work of passing the one-side bolt 49 through the fixing hole 47 and the co-tightening hole 53 and fixing it to the pilot hole 51 can be performed more easily and safely.

[0091] Therefore, according to the bracket mounting auxiliary device 13 of this embodiment, the bracket mounting auxiliary device 13 to be interposed between the plate 27 of the bracket 15 and the mounting bases 21, 23 is formed to be lightweight, and this bracket mounting auxiliary device 13 is provided with a reference line 55, a fastening hole 57 for pre-attachment, and a co-fastening hole 53 for co-fastening with the plate 27, so that the bracket 15 can be mounted easily and safely while achieving construction without fire.

[0092] Furthermore, according to the method of mounting a switching device bracket using the bracket mounting auxiliary tool 13 of this embodiment, the lightweight bracket mounting auxiliary tool 13 with reference line 55 is aligned with the mounting bases 21, 23 and pre-attached with drill screw 67, pilot holes 51 are drilled in the mounting bases 21, 23 using the co-tightening holes 53 provided in this bracket mounting auxiliary tool 13, and the one-side bolt 49 inserted through the plate 27 of the bracket 15 is passed through the co-tightening hole 53 of the bracket mounting auxiliary tool 13 to fasten and fix the bracket mounting auxiliary tool 13 to the pilot holes 51 of the mounting bases 21, 23. Therefore, the bracket 15 can be mounted easily and safely while achieving construction without fire.

[0093] The present invention is not limited to the above-described embodiments, and the present invention also contemplates the mutual combination of the various components of the embodiments, as well as modifications and applications by those skilled in the art based on the description in the specification and well-known techniques, and these are included in the scope of protection sought.

[0094] FIG. 11 is a perspective view showing the mounting structure of the bracket 15 when the mounting base is a vertical base 75. As shown in FIG. For example, in the above configuration example, the mounting base is arranged above the opening and is a pair of parallel upper and lower mounting bases 21 and 23 that are long across the width of the opening, but the mounting base may also be a single vertical base 75 that is long along the vertical direction and has a mounting surface 37 with a width narrower than the width of the plate 27. In the case of the vertical base 75, the mounting position of the guide rail 19 and the mounting position of the bracket 15 may shift in the sleeve direction, and the position of the bracket 15 may deviate from the vertical base 75. In such a case, an additional material 77 such as an angle iron is fixed vertically to the side of the vertical base 75.

[0095] FIG. 12 is an exploded perspective view of FIG. One side of the additional material 77 is fixed to the side surface of the vertical base 75, and the other side becomes an extended support surface 79 that is continuous with the mounting surface 37 of the vertical base 75. One side of the additional material 77 is fixed by a through bolt 81 that passes horizontally through the vertical base 75 and a nut 83 that screws onto the tip of the through bolt 81. The plate 27 of the bracket 15 has a fixing hole 47 that overlaps with the vertical base 75 and is fastened and fixed to the vertical base 75 by a one-side bolt 49. Also, the fixing hole 47 of the plate 27 that overlaps with the extended support surface 79 can be fastened and fixed to the other side of the additional material 77 by a normal bolt 85 and nut 83.

[0096] FIG. 13 is a plan view of FIG. In the mounting structure of the bracket 15, a guide rail base for mounting the guide rail 19 may be used on the vertical base 75. The above-mentioned bracket mounting auxiliary tool 13 can also be used in the mounting structure of the bracket 15 in which the additional material 77 is attached to such a vertical base 75. That is, the bracket mounting auxiliary tool 13 is pre-attached to the mounting surface 37 of the vertical base 75 and the extended support surface 79 of the additional material 77, and the pilot holes 51 are drilled in the vertical base 75 and the additional material 77 using the common fastening holes 53 provided in the bracket mounting auxiliary tool 13 (as a template). The following steps can be performed in the same manner as the above-mentioned bracket mounting method. According to the mounting structure of the bracket 15, even if the axis 25 is misaligned from the vertical base 75 and the vertical base 75 is no longer present, the bracket 15 can be easily and safely mounted on the vertical base 75 while achieving construction without fire. [Explanation of symbols]

[0097] 11...Opening and closing device (shutter device) 13... Bracket mounting aid 15…Bracket 17...Opening and closing body (shutter curtain) 21...Mounting base (upper mounting base) 23...Mounting base (lower mounting base) 25…Axis 27…Plate 28...Front 35…Bracket body 47…Fixing hole 49...First fastening member (one-sided bolt) 51…Pilot hole 53...Common fastening hole 55…Baseline 57…Fastening hole 60…Surface 61…Handle 67...Second fastening member (drill screw) 68…Lower edge 69…Placement piece 71...Upper edge insertion groove 72…Upper edge 73…Lower edge insertion groove

Claims

1. A bracket mounting auxiliary tool that is attached together with a bracket when the bracket of an opening and closing device is attached to a building frame, comprising: The bracket is A bracket body for supporting shafts protruding from both left and right ends of a winding body that winds up the opening / closing body; a plate whose back surface faces a pair of upper and lower mounting bases arranged above the opening in the building structure and whose front surface is welded to the bracket body; a first fastening member for fastening the plate to the mounting base by being inserted into a plurality of fastening holes formed in at least an upper portion of the plate; It is equipped with The bracket mounting aid is The bracket is lighter than the bracket and is interposed between the rear surface of the plate and the mounting surface of the mounting base. Horizontal and vertical reference lines on the surface; A plurality of fastening holes for inserting and fixing second fastening members to the mounting base; a co-fastening hole that is drilled at the same position as the fixing hole and is inserted into the fixing hole of the plate overlapped on the surface, and through which the first fastening member passes and is fastened together with the plate to a pilot hole of the mounting base; A bracket mounting aid comprising:

2. 2. The bracket mounting auxiliary tool according to claim 1, wherein a support piece for supporting a lower edge of the plate is provided at a lower edge of the bracket mounting auxiliary tool.

3. The bracket mounting auxiliary tool described in claim 1, characterized in that an upper edge insertion groove for inserting the upper edge of the plate is provided at the upper edge of the bracket mounting auxiliary tool, and a lower edge insertion groove for inserting the lower edge of the plate is provided at the lower edge of the bracket mounting auxiliary tool opposite the upper edge insertion groove.

4. 4. The bracket mounting aid according to claim 3, wherein the upper edge insertion groove and the lower edge insertion groove are formed by bending the upper edge and the lower edge of the bracket mounting aid.

5. 5. A bracket mounting aid according to claim 3, wherein the upper edge insertion groove has a groove width greater than the groove width of the lower edge insertion groove.

6. 5. The bracket mounting aid according to claim 1, wherein a handle is formed on at least one of the left and right edges of the bracket mounting aid.

7. 6. The bracket mounting aid according to claim 5, wherein a handle is formed on at least one of the left and right edges of the bracket mounting aid.

8. A method for mounting a switchgear bracket to a building frame, comprising the steps of: a positioning step of positioning a bracket mounting auxiliary tool, which is lighter than the bracket, on a pair of upper and lower mounting bases arranged above the opening in the building structure by aligning horizontal and vertical reference lines marked on the surface with the horizontal and vertical reference lines of a level; an auxiliary tool mounting step of fastening and fixing the bracket mounting auxiliary tool to the mounting base with second fastening members inserted into a plurality of fastening holes formed in the bracket mounting auxiliary tool; a pilot hole drilling step of drilling pilot holes in the mounting base using common fastening holes pre-drilled in the bracket mounting auxiliary tool; a co-fastening step of placing a plate, to which a bracket body is welded and fixed, on a surface of the bracket mounting auxiliary tool, and fastening a first fastening member, which is inserted into a fixing hole formed in the plate, through a co-fastening hole and the pilot hole of the bracket mounting auxiliary tool to the mounting base; A method for mounting a bracket for a switching device, comprising:

9. The co-tightening process includes:

9. The method for mounting a switchgear bracket according to claim 8, further comprising the step of placing a lower edge of the plate on a mounting piece provided on a lower edge of the bracket mounting auxiliary tool.

10. The co-tightening process includes: The mounting method for an opening and closing device bracket according to claim 8, further comprising the steps of inserting an upper edge of the plate into an upper edge insertion groove provided on an upper edge of the bracket mounting auxiliary tool, and inserting a lower edge of the plate into a lower edge insertion groove provided on a lower edge of the bracket mounting auxiliary tool, thereby holding the plate on the bracket mounting auxiliary tool.

11. The co-tightening process includes: The mounting method for an opening and closing device bracket according to claim 8, further comprising a step of holding the plate in the bracket mounting auxiliary in a Kendon style with an upper edge insertion groove provided on an upper edge of the bracket mounting auxiliary and a lower edge insertion groove provided on a lower edge of the bracket mounting auxiliary and facing the upper edge insertion groove.

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