Fixture for lip channel, and ceiling device fitting tool

Abstract

To securely fix a fixing object to a lip channel from both sides by reducing the number of components.SOLUTION: A fixture 12 for a lip channel includes: a U-shaped upper side pressing metal fitting 12a having an upper plate 12a1 disposed with a through hole 12a11, and a pair of horizontal plates 12a2, 12a3; a bolt 12b disposed with a shaft part inserted into the through hole of the upper side pressing metal fitting 12a, and a head part having an external diameter larger than that of the shaft part; a lower side rotation pressing tool 12c disposed at the tip of the bolt 12b, and holding channel materials 11, 11 between a ceiling joist material and the upper side pressing metal fitting 12a by being inserted into a housing groove part of the ceiling joist material, rotated and abutted on the lower side of a lip piece; and a butterfly nut 12d screwed to a bolt 12b projecting from the through hole 12a11 of the upper side pressing metal fitting 12a, and holding the channel materials 11, 11 between the upper side pressing metal fitting 12a and the ceiling joist materials 3, 3' by attracting the lower side rotation pressing tool 12c positioned in the housing groove part of the ceiling joist materials 3, 3'.SELECTED DRAWING: Figure 18

Description

[Technical Field]

[0001] The present invention relates to a lip channel steel fastener that fastens an object to be fixed to a lip channel steel, and to an attic equipment mounting fixture that uses a lip channel steel fastener to mount attic equipment such as a repeater (also called a radio wave amplifier or radio wave repeater) to a lip channel steel siding material in the attic. [Background technology]

[0002] In lightweight steel structures, lip channel steel, which has a U-shaped cross section and a pair of lip pieces, is often used.For example, as a fixing device for lip channel steel to secure panels such as solar panels to lip channel steel, a fixing device has been proposed that includes a rotating fitting through which the shank of a bolt is passed and which is accommodated in the accommodation groove of the lip channel steel and rotates to press the lip piece from below, a top plate fitting that presses the lip piece from above, and a support fitting that presses the panel (see, for example, Patent Document 1).

[0003] Furthermore, when installing ceilings in office buildings and the like, lip channel steel, also known as a joist, which has engaging pieces, is used as the ceiling frame secured with hanging bolts, and angle irons of a length spanning the ceiling frame (joist) are secured to the ceiling frame (joist), and above-ceiling equipment is attached to these angle irons with bolts or the like, and the ceiling frame (joist) and the angle iron to which above-ceiling equipment such as air conditioning equipment is secured are secured with double-sided tape, nails, or the like (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-98890 [Patent Document 2] Japanese Patent Application Publication No. 10-132373 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the lip channel steel fastener of Patent Document 1 requires top plate fittings and support fittings in addition to bolts, nuts, and rotating fittings to secure the panel to the lip channel steel, which increases the number of parts required.

[0006] In particular, when lip channel steel is used to form a ceiling frame (rough joist) that also constitutes a suspended ceiling, work is carried out above the ceiling, which is higher than the worker's eye level, so it is desirable to reduce the number of parts.

[0007] Furthermore, the support brackets of the lip channel steel fasteners in Patent Document 1 are formed in an L-shape so as to press down on the end of the panel from one side, so even in the case of a narrow object to be fixed, such as an angle bar that is long enough to span between ceiling frames (floor joists) in the attic space disclosed in Patent Document 2, two sets of support brackets are required to press down on the object from both sides in order to securely fix the object to the ceiling frames (floor joists), which also increases the number of parts.

[0008] Furthermore, in the ceiling equipment mounting fixture of Patent Document 2, the ceiling equipment is an air conditioning device such as an air conditioner, and in the case of air conditioning equipment, the installation position is usually predetermined from the design stage based on factors such as the position of the air outlet that opens toward the room, and since it is quite heavy, it can be reliably set by fixing it with double-sided tape or nails, etc. However, if the ceiling equipment is a communication device such as a repeater, it is lighter than an air conditioning device such as an air conditioner, and fixing it with double-sided tape or nails, etc., is insufficient because it may fall over or become displaced over time.

[0009] Therefore, the present invention was made with an eye on such problems, and aims to provide a lip channel steel fixing device and ceiling equipment mounting device that can securely fix the object to the lip channel steel from both sides while reducing the number of parts. [Means for solving the problem]

[0010] In order to solve the above problems, the lip channel steel fixing device of the present invention is a lip channel steel fixing device that fixes an object to be fixed to a lip channel steel having an accommodation groove surrounded by at least a channel bottom plate, a pair of channel wall plates that bend and extend from both sides of the bottom plate, and lip pieces that bend inward from the tips of the pair of channel wall plates, and includes an upper retainer that has an upper wall portion with a through hole and a pair of side wall portions that bend and extend from both sides of the upper wall portion, a bolt that is provided with a shaft portion that is inserted into the through hole of the upper retainer and a head portion that has an outer diameter larger than that of the shaft portion, and a bolt that is provided on the head side of the bolt and is inserted into the accommodation groove of the lip channel steel. and a clamping nut that screws onto the shank of the bolt protruding from the through hole of the upper clamp and rotates to attract the lower rotating clamp located in the accommodating groove of the lip channel steel, thereby clamping the object to be fixed between the upper clamp and the lip channel steel.The clamping nut is characterized in that the distance between at least one side wall portion of the upper clamp and the through hole is equal to or greater than the width of the object to be fixed, and is configured so that the object to be fixed is accommodated between the one side wall portion and the shank of the bolt passed through the through hole. In addition, the lip channel steel fastener of the present invention is also characterized in that the height of one of the side walls, whose distance to the through hole in the upper clamp is greater than the width of the object to be fixed, is lower than the height of the object to be fixed. In addition, in the lip channel steel fastener of the present invention, the through hole of the upper clamp is provided at a position offset from the center between the pair of side wall portions in the upper wall portion, and the distance to the through hole of one side wall portion is equal to or greater than the width of the object to be fixed, and the distance to the through hole of the other side wall portion is less than the width of the object to be fixed. Furthermore, the lip channel steel fastener according to the present invention is also characterized in that the height of the other side wall portion of the upper retainer is approximately the same as the height of the one side wall portion. In addition, in the lip channel steel fixing device of the present invention, the lip channel steel further has a pair of engaging pieces folded back in an L shape from the respective tips of the pair of lip pieces toward the channel bottom plate, and the upper surface side of both longitudinal ends of the lower rotating clamp is each provided with a protrusion that fits into the engaging groove portion between the channel wall plate of the lip channel steel groove and the engaging pieces. In addition, the lip channel steel fastener of the present invention is characterized in that the protrusions provided on the upper surface of both longitudinal ends of the lower pivot clamp are provided at multiple locations spaced apart in the short direction of the lower pivot clamp, and are provided at positions with different distances from the shaft of the bolt. Furthermore, the lip channel steel fastener of the present invention is characterized in that a through hole through which the shank of the bolt passes is provided at the longitudinal center of the lower pivot clamp, and a recess into which the head of the bolt fits is provided on the underside thereof, so that the bolt and the lower pivot clamp are configured to rotate together around the shank of the bolt. In addition, the ceiling equipment mounting fixture of the present invention is a ceiling equipment mounting fixture for installing an equipment mounting plate to which ceiling equipment is attached using any of the lip channel steel fixing devices described above, wherein the lip channel steel is a furring strip that constitutes a suspended ceiling, the object to be fixed is a channel material that has a through hole for passing the bolt through and to which the equipment mounting plate is fixed, and is installed crosswise at a predetermined interval on top of a plurality of the furring strips, and the lip channel steel fixing device is used to fix the furring strips and the channel material installed on top of them. [Effects of the Invention]

[0011] The lip channel steel fixing device of the present invention comprises an upper clamp having an upper wall portion with a through hole and a pair of side wall portions extending in a curved manner from both sides of the upper wall portion; a bolt having a shaft portion inserted into the through hole of the upper clamp and a head portion having an outer diameter larger than that of the shaft portion; a lower rotating clamp provided at the tip of the bolt and inserted into the accommodating groove of the lip channel steel and rotating to abut the underside of the lip piece and clamp the object to be fixed between the lip channel steel and the upper clamp; and a clamping nut that screws onto the bolt protruding from the through hole of the upper clamp and rotates to attract the lower rotating clamp located in the accommodating groove of the lip channel steel and clamp the object to be fixed between the upper clamp and the lip channel steel, and the distance between at least one side wall portion of the upper clamp and the through hole is greater than the width of the object to be fixed. Therefore, with the lip channel steel fastener of the present invention, by passing the shank of the bolt through the through hole in the upper wall of the upper retainer and tightening it with a nut, the object to be fastened can be clamped and fastened between the lip channel steel and the upper wall of the U-shaped upper retainer, and the object can be held down from both sides by one of the side walls and the bolt. As a result, the object can be reliably fastened to the lip channel steel and the number of parts can be reduced. [Brief explanation of the drawings]

[0012] [Figure 1] 1A and 1B are perspective views showing examples of use of a lip channel steel fastener according to an embodiment of the present invention when the width of the rough siding is double width and single width, respectively. [Figure 2] 1 is an exploded perspective view showing the configuration of an attic equipment installation tool using a lip channel steel fastener according to an embodiment of the present invention. FIG. [Figure 3] 1A and 1B are a plan view and a front view, respectively, showing the configuration of an attic equipment installation tool using a lip channel steel fastener according to an embodiment of the present invention. [Figure 4] 4(a) and 4(b) are right side views showing the configuration of an attic equipment installation tool using a lip channel steel fastener according to an embodiment of the present invention, and an enlarged view of part A in FIG. 4(a), respectively. [Figure 5]5(a) to 5(e) are respectively a perspective view, a plan view, a front view, a side view, and a cross-sectional view along line BB in FIG. 5(b) of a channel member constituting the ceiling equipment installation tool of the embodiment according to the present invention. [Figure 6] 6(a) to 6(e) are respectively a perspective view, a plan view, a front view, a side view, and a cross-sectional view along line CC in FIG. 6(b) of an upper pressing tool that constitutes a lip channel steel fixing tool of an embodiment according to the present invention. [Figure 7] 1A to 1C are a perspective view, a plan view, and a front view, respectively, of a bolt that constitutes a lip channel steel fastener according to an embodiment of the present invention. [Figure 8] 1A and 1B are a perspective view and a plan view, respectively, of a lower rotation pressing tool that constitutes a lip channel steel fixing device according to an embodiment of the present invention. [Figure 9] 9(a) to 9(d) are respectively a front view, a bottom view, a right side view, and a cross-sectional view along line DD in FIG. 9(a) of a lower rotation pressing tool that constitutes a lip channel steel fixing tool of an embodiment according to the present invention. [Figure 10] 10(a) to 10(e) are respectively a perspective view, a plan view, a front view, a side view, and a cross-sectional view along line EE in FIG. 10(d) of a wing nut that constitutes a lip channel steel fastener according to an embodiment of the present invention. [Figure 11] 1A to 1C are a perspective view, a plan view, and a front view, respectively, of an equipment mounting plate that constitutes the ceiling equipment installation tool of the embodiment according to the present invention. [Figure 12] 1A and 1B are side views of a double-width and a single-width lip channel steel member, which are lip channel steel members to which channel steel members are fixed using a lip channel steel fastener according to an embodiment of the present invention. [Figure 13] 1A and 1B are perspective views showing the steps for fixing a repeater mounting plate to a channel material using a lip channel steel fixing device according to an embodiment of the present invention, in which the repeater mounting plate is attached with its longitudinal direction parallel to the longitudinal direction of the channel material, and in which the repeater mounting plate is attached with its short side parallel to the longitudinal direction of the channel material. [Figure 14]1A and 1B are perspective views showing a state in which a bracket, a square outlet base, etc. are attached to a repeater mounting plate attached to a channel material using a lip channel steel fastener according to an embodiment of the present invention, and a state in which a repeater and a square outlet body are attached, respectively. [Figure 15] (a) to (c) are oblique views showing, respectively, the state when the bolt that constitutes the lip channel steel fixing device of an embodiment of the present invention is being assembled into the lower pivot clamp, the state when the upper clamp and wing nut are further assembled into the bolt assembled into the lower pivot clamp, and the state when the channel material with the repeater mounting plate fixed is temporarily placed on the rough siding material. [Figure 16] (a) to (c) are figures showing the state in which a lip channel steel fixing device of an embodiment of the present invention is brought close to a channel material temporarily placed on a furring strip, the state in which the lower rotating clamp of the lip channel steel fixing device is accommodated in the accommodation groove of the furring strip, and the state in which the lower rotating clamp is accommodated in the accommodation groove of the furring strip and then moved until the upper clamp is positioned above the channel material. [Figure 17] (a) and (b) are figures showing the state in which the protrusion of the lower rotating clamp of the lip channel steel fixing device of an embodiment of the present invention is engaged with a double-width furring strip and a single-width furring strip, respectively. [Figure 18] (a) and (b) are respectively an oblique view showing the state in which a channel material placed on a rough siding material is fixed using a lip channel steel fixing device of an embodiment of the present invention, and a front view showing the state of the lip channel steel fixing device at that time. [Figure 19] 19(a) and (b) are a side view of the essential part showing the state in which a channel material placed on a double-width rough siding material is fixed using a lip channel steel fixing device of an embodiment of the present invention, and an enlarged view of part F in FIG. 19(a), respectively. [Figure 20] 20(a) and (b) are a side view of the essential part showing the state in which a channel material placed on a single-width rough siding material is fixed using a lip channel steel fixing device of an embodiment of the present invention, and an enlarged view of part F in FIG. 20(a), respectively. [Figure 21](a) to (c) are respectively a front view of a normal lip channel steel, and a plan view and a front view of an embodiment of a lip channel steel fastener according to the present invention, showing a state in which a channel material placed on a normal lip channel steel without an engaging piece is fastened. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the lip channel steel fastener according to the present invention and the ceiling equipment mounting fixture for installing ceiling equipment on a joist using the lip channel steel fastener will be described with reference to the drawings. Note that the embodiments described below are merely examples of the present invention, and the present invention is not limited to these and can be modified as appropriate within the scope of the technical concept of the present invention. Furthermore, in the embodiments described below, a repeater 2 will be used as an example of ceiling equipment, but the present invention is not limited to a repeater 2 as an example of ceiling equipment.

[0014] <Configuration of the ceiling equipment fixture 1 according to the embodiment> The ceiling equipment mounting fixture 1 of an embodiment of the present invention is a mounting fixture used to mount a ceiling equipment repeater 2 to the furring members 3, 3' that make up a suspended ceiling, as shown in Figures 1(a) and 1(b), and is configured to include two channel members 11, 11 that are the objects to be fixed, a lip channel steel fixing fixture 12 of an embodiment of the present invention that fixes the furring members 3, 3' and the channel members 11, 11 installed above them, and a repeater mounting plate 13 that is fixed between the channel members 11, 11 and on which the ceiling equipment repeater 2 is mounted.

[0015] Furthermore, the lip channel steel fastener 12 according to the embodiment of the present invention is made up of an upper press fitting 12a, a bolt 12b, a lower rotation press fitting 12c, a wing nut 12d which is a clamping nut, and the like.

[0016] In this embodiment, the narrow fixing objects to be fixed to the lip channel steel furring members 3, 3' by the lip channel steel fixing device 12 of the embodiment according to the present invention are two channel members 11, 11. As shown in Figures 12(a) and (b) described later, the furring members 3, 3' include a double-width furring member 3 with a width W of 50 mm and a single-width furring member 3' with a width W of 25 mm, which are standardized by JIS and the like and are commonly used as furring members for suspended ceilings.

[0017] (Channel Material 11) 5(a) to 5(d), the channel member 11 is composed of a top plate 11a and side plates 11b, 11b bent at 90 degrees from both sides of the top plate 11a, and is a fixed object that is installed so as to intersect on the roof siding members 3, 3', with a plurality of elongated holes 11a1 formed at predetermined intervals in the top plate 11a. These elongated holes 11a1 are used to pass through the repeater plate mounting bolts 14a that secure the repeater mounting plate 13, as well as various wiring such as an electric wire (not shown) that supplies power to the repeater 2 and a communication line (not shown).

[0018] Here, as shown in FIG. 5(d), the height of the channel member 11, that is, the height of its side plates 11b, 11b, is defined as H1.

[0019] (Lip channel steel fixing 12) As described above, the lip channel steel fixing device 12 fixes the rough siding materials 3, 3' and the channel materials 11, 11, and is composed of an upper clamping bracket 12a, a bolt 12b, a lower rotating clamping device 12c, and a wing nut 12d which is a clamping nut.

[0020] (Upper clamp 12a) 6(a) to 6(d), the upper press fitting 12a is formed in a U-shape by an upper plate 12a1, which is the upper wall portion, and a pair of horizontal plates 12a2, 12a3, which are side wall portions that bend 90 degrees and hang down from both sides of the upper plate 12a1, and the upper plate 12a1 is provided with a through hole 12a11 for passing a bolt 12b. The pair of horizontal plates 12a2, 12a3 have different heights, so the taller one may be referred to as the long horizontal plate 12a2 and the shorter one as the short horizontal plate 12a3, as appropriate.

[0021] As shown in Figure 6(d), if the height from the lower surface of the upper plate 12a1 to the lower end of the long horizontal plate 12a2 is H2 and the height from the lower surface of the upper plate 12a1 to the lower end of the short horizontal plate 12a3 is H3, and the height of the channel material 11 is H1 (see Figure 5(d)), then the height H2 of the long horizontal plate 12a2 of the upper clamping metal fitting 12a is approximately the same as the height H1 of the channel material 11, with H1 ≈ H2 > H3, so that the channel material 11 can be clamped and fixed from above by the upper clamping metal fitting 12a. Of course, the height H2 of the long horizontal plate 12a2 of the upper clamping metal fitting 12a may be the same as the height H1 of the channel material 11.

[0022] (Bolt 12b) The bolt 12b is inserted into the through hole 12a11 of the upper pressure fitting 12a as shown in Figures 7(a) to (c), and is a small bolt. As shown in Figures 7(a) to (c), the bolt has a shaft 12b1 with a male thread formed on its outer surface, and a hexagonal head 12b2 provided at the tip of the shaft 12b1.

[0023] (Lower rotating retainer 12c) The lower rotating clamp 12c is made of resin or the like, and is used by inserting it into the shaft portion 12b1 of the bolt 12b as described below.After inserting it into the accommodating groove portion 31, 31' of the furring strip 3, 3', it is rotated to abut against the upper surface 3c, 3c' of the furring strip 3, 3' and the lower end portion of the engaging piece 3d, 3d' from below, thereby clamping the channel material 11, 11 between the furring strip 3, 3' and the upper clamp fitting 12a.

[0024] Specifically, as shown in Figures 8(a), (b) and Figures 9(a) to (d), the lower rotation presser 12c is formed in a substantially rectangular shape in plan view, with a longitudinal length of L1 and a lateral length of L2, and in the center of the longitudinal direction is provided a protrusion 12c1 having a through hole 12c11 through which the shaft 12b1 of the bolt 12b passes.

[0025] At both longitudinal ends of the upper surface (surface) of lower rotation retainer 12c, two protrusions, an outer protrusion 12c2 and an inner protrusion 12c3, are provided at a predetermined interval in the short direction and aligned diagonally relative to the longitudinal direction of lower rotation retainer 12c. As will be described later, outer protrusion 12c2 engages with engagement groove 32 of double-width furring strip 3, and inner protrusion 12c3 engages with engagement groove 32' of single-width furring strip 3'.

[0026] Furthermore, a hexagonal recess 12c4 is provided in the longitudinal center of the lower surface (back surface) of the lower rotation retainer 12c, into which hexagonal head 12b2 at the tip of shank 12b1 of bolt 12b passing through through hole 12c11 is fitted.

[0027] In addition, at both longitudinal ends of the lower rotation retainer 12c, curved side surfaces 12c5 are provided with rounded corners at both longitudinal ends of the lower rotation retainer 12c so that the outer protrusions 12c2 can reliably engage with the engagement grooves 32 of the double-width roof siding 3 when the lower rotation retainer 12c is inserted into the accommodation grooves 31 of the double-width roof siding 3 and rotated.

[0028] (Wing nut 12d) The wing nut 12d is a well-known wing nut that screws onto the bolt 12b protruding from the through hole 12a11 of the upper clamping fixture 12a as shown in Figures 10(a) to (d), rotates to attract the lower rotating clamping fixture 12c located in the accommodating groove portion of the furring strip 3, 3', and clamps the channel material 11, 11 between the upper clamping fixture 12a and the furring strip 3, 3', and is provided with a female screw hole 12d1 that screws into the male thread portion of the shaft portion 12b1 of the bolt 12b.

[0029] (Repeater mounting plate 13) The repeater mounting plate 13 is fixed onto the channel materials 11, 11 as shown in Figures 1(a) and (b), and is a mounting plate for mounting the repeater 2. As shown in Figure 2, etc., it has 12 female threaded portions 13a into which the repeater plate mounting bolts 14a, bracket mounting bolts 14b, outlet mounting bolts 14c, etc. are screwed, and two elongated wiring holes 13b are provided to pass wiring to the square outlet.

[0030] The repeater mounting plate 13 is also provided with longitudinal center notches 13c, 13c indicating the center point in the longitudinal direction, and also with lateral center notches 13d, 13d indicating the center point in the lateral direction.

[0031] <Repeater 2> The repeater 2 is a well-known communication device called a radio wave amplifier or radio wave repeater that receives, amplifies, and transmits radio waves from a base station to improve indoor radio wave conditions in order to eliminate weak spots in indoor areas, and is attached to the repeater mounting plate 13 via a bracket 2a as shown in Figure 1. The bracket 2a is fixed to the repeater mounting plate 13 with repeater plate mounting bolts 14a.

[0032] The base 13b of the square outlet is fixed to the repeater mounting plate 13 by repeater plate mounting bolts 14a, outlet mounting bolts 14c, and bracket mounting bolts 14b, the square outlet body 2c is attached to the square outlet base part 2b, and the power plug (not shown) of the repeater 2 is inserted into the square outlet body 2c.

[0033] <Rib material (lip channel steel) 3,3'> The lip channel steel of this embodiment is one of the lip channel steels attached to the lower end of the suspension bolt 22 for constructing a suspended ceiling. As shown in FIGS. 12(a) and (b), there are a double-width edge member 3 with a width of 50 mm and a single-width edge member 3' with a width of 25 mm. There are lower plates 3a, 3a', a pair of groove wall plates 3b, 3b' that rise vertically by bending 90 degrees from both ends of the lower plates 3a, 3a', lip pieces 3c, 3c' that are bent inward in an L shape at the tip (upper end) parts of the groove wall plates 3b, 3b' and face the lower plates 3a, 3a', and engaging pieces 3d, 3d' that are bent 90 degrees from the inner tip parts of the lip pieces 3c, 3c' and extend toward the lower plates 3a, 3a'.

[0034] Therefore, the edge members 3, 3' are respectively surrounded by the lower plates 3a, 3a' and a pair of groove wall plates 3b, 3b' and the like, and have accommodation groove portions 31, 31' for accommodating the lower rotation retainer 12c, and are surrounded by the upper parts of the pair of groove wall plates 3b, 3b', the lip pieces 3c, 3c', and the engaging pieces 3d, 3d', and have engaging groove portions 32, 32' with which the outer protrusion 12c2 and the inner protrusion 12c3 of the lower rotation retainer 12c engage.

[0035] Here, when the distance between the inner side surfaces of the groove wall plates 3b, 3b of the double-width edge member 3 with a width of 50 mm is W1 as shown in FIG. 12(a), and the distance between the engaging pieces 3d, 3d' of the single-width edge member 3' with a width of 25 mm is W2 as shown in FIG. 12(b), in order to accommodate the lower rotation retainer 12c in the accommodation groove portions 31, 31' of the edge members 3, 3' and be able to firmly press the lip pieces 3c, 3c' and the engaging pieces 3d, 3d' from below, the lengths L1, L2 of the lower rotation retainer 12c are determined so that the relationship L2 < W2 < W1 < L1 holds.

[0036] <Mounting Method of Repeater 2 Using Ceiling Back Equipment Mounting Tool 1 of Embodiment> Next, a mounting method of the repeater 2 using the fixing tool 12 for the lip channel steel and the ceiling back equipment mounting tool 1 according to the embodiment of the present invention configured as described above will be described.

[0037] First, when the repeater 2 is installed with its front surface facing the short side of the channel members 11, 11, the two channel members 11, 11 are spaced apart in advance by about 140 mm, which is the width of the repeater mounting plate 13 in the short side direction, as shown in Figure 13(a), and the repeater mounting plate 13 is fixed with the repeater plate mounting bolts 14a. When the repeater 2 is installed with its orientation facing the long side of the channel members 11, 11, the two channel members 11, 11 are spaced apart by about 290 mm, which is the width of the repeater mounting plate 13 in the long side direction, as shown in Figure 13(b).

[0038] Next, as shown in FIG. 14(a), the bracket 2a is fixed onto the repeater mounting plate 13 fixed to the channel members 11, 11 using bracket mounting bolts 14b, and the square outlet base 2b is fixed using outlet mounting bolts 14c. Thereafter, as shown in FIG. 14(b), the repeater 2 is fixed to the bracket 2a, and the square outlet body 2c is attached to the square outlet base 2b.

[0039] In addition, in order to fix the two channel members 11, 11 temporarily placed on the two rough siding members 3, 3 at their respective intersections using the lip channel steel fixing device 12 of an embodiment of the present invention, first, as shown in Figure 15(a), the head 12b2 of the bolt 12b is passed downward through the through hole 12c11 of the lower rotating clamp 12c, with its shaft 12b11 facing downward, and then, although not shown in Figure 15(a), the hexagonal head 12b2 of the bolt 12b is fitted into the recess 12c4 on the underside (backside) of the lower rotating clamp 12c.

[0040] Next, as shown in Figure 15(b), the shaft portion 12b11 of the bolt 12b to which the lower rotation clamp 12c is attached is passed from below the through hole 12a11 of the upper pressure fitting 12a, and a wing nut 12d is screwed onto the tip of the shaft portion 12b11, thereby assembling the upper pressure fitting 12a and the lower rotation clamp 12c in advance with the bolt 12b and the wing nut 12d.

[0041] Note that the work up to this point is done on the floor, not in the attic.

[0042] Therefore, when fixing the channel members 11, 11 to the furring strips 3, 3' that make up a suspended ceiling installed at a high place, the worker's hands are often higher than the worker's eye height, but since there is no need to fit the wing nut 12d onto the tip of the bolt 12b at a high place such as the attic, work efficiency can be improved.

[0043] Next, a worker uses a stepladder or tripod (not shown) to lift the repeater 2 and other components fixed to the two channel members 11, 11 via the repeater mounting plate 13 up to the attic and temporarily places it on two of the furring members 3, 3 that make up the suspended ceiling in a location optimal for transmitting and receiving radio waves, as shown in Figure 15(c). Note that the state shown in Figure 15(c) is a temporary placement state, and since the repeater is not fixed by the lip channel steel fixing device 12 of the embodiment and can be moved, it is advisable to measure the transmission and reception strength of radio waves from the repeater 2 in this state and move it to the optimal position as appropriate.

[0044] Next, to fix the two channel members 11, 11 temporarily placed on the two furring strips 3, 3 at their intersections using the lip channel steel fastener 12 of the embodiment according to the present invention, the worker moves the upper clamp 12a and the lower pivoting clamp 12c, which have been previously assembled with bolts 12b and wing nuts 12d, above the furring strips 3 near the intersection, such as just before the intersection of the two furring strips 3, 3 and the two channel members 11, 11, as shown in Figure 16(a), and then inserts the lower pivoting clamp 12c into the accommodation groove 31 of the furring strips 3 as shown in Figure 16(b). At this time, it is easier to insert the lower pivoting clamp 12c if the longitudinal direction of the lower pivoting clamp 12c is parallel to the longitudinal direction of the furring strips 3.

[0045] Next, the worker rotates the lower rotation retainer 12c to engage the outer protrusion 12c2 or the inner protrusion 12c3 on the upper surface (surface) of the lower rotation retainer 12c with the engaging grooves 32, 32' of the roof siding materials 3, 3'.

[0046] Figure 17(a) shows the engagement state of the lower rotating retainer 12c in the case of the double-width furring strip 3 having a width of 50 mm shown in Figure 12(a), in which the outer protrusions 12c2, 12c2 on both ends of the lower rotating retainer 12c each engage with the engagement groove 32 of the double-width furring strip 3. On the other hand, in the case of a single-width furring strip 3' having a width of 25 mm, the inner protrusions 12c3, 12c3 on both ends of the lower rotating retainer 12c each engage with the engagement groove 32' of the single-width furring strip 3' as shown in Figure 17(b).

[0047] As shown in Figures 17(a) and (b), when the outer protrusion 12c2 or inner protrusion 12c3 of the lower rotating clamp 12c inserted into the storage groove 31, 31' of the furring strip 3 engages with the engagement groove 32, 32' of the furring strip 3, 3', the worker lifts the upper clamp 12a etc. and moves it toward the intersection of the two furring strips 3, 3 and the two channel members 11, 11 so that the upper end of the outer protrusion 12c2 or inner protrusion 12c3 abuts against the back side of the lip piece 3c, 3c' of the furring strip 3, 3', as shown in Figure 16(b).

[0048] Then, as shown in Figure 16(c), when the shaft portion 12b1 of the bolt 12b is moved until it abuts or is about to abut against the side plate 11b of the channel material 11, the short horizontal plate 12a3 of the upper pressure fitting 12a reaches a position beyond the side plate 11b on the opposite side of the channel material 11.

[0049] Therefore, the worker rotates the wing nut 12d threaded onto the tip of the shaft 12b of the bolt 12b, and lowers the upper pressure fitting 12a together with the wing nut 12d, and continues to rotate the wing nut 12d and lower the upper pressure fitting 12a until the lower surface of the upper plate 12a1 of the upper pressure fitting 12a abuts the upper surface of the lip piece 11a1 of the channel material 11.

[0050] As a result, as shown in Figures 18(a) and (b), the channel material 11 placed on the rough siding material 3 is tightly clamped in the vertical direction by the underside of the upper plate 12a1 of the upper clamping bracket 12a and the upper surface of the lip piece 11a1 of the channel material 11, while in the horizontal direction it is held in place by the shaft 12b of the bolt 12b and the short horizontal plate 12a3 of the upper clamping bracket 12a, without being tightly clamped, so as not to shift.

[0051] 19(a) and 19(b) are side views and an enlarged view of part E, showing the clamping state of the upper clamping fixture 12a, the lower pivoting fixture 12c, the bolt 12b, and the wing nut 12d at the intersection of the 50mm-wide double-width furring board 3 and the channel material 11 placed on top of it. In the case of the 50mm-wide double-width furring board 3, the outer protrusions 12c2, 12c2 on both ends of the lower pivoting fixture 12c each engage with the engagement groove 32 surrounded by the groove wall panel 3b, lip piece 3c, and engagement piece 3d of the double-width furring board 3, and the upper ends of the outer protrusions 12c2, 12c2 abut against the back side of the lip piece 3c of the furring board 3, clamping the channel material 11 between the furring board 3 and the upper clamping fixture 12a.

[0052] 20(a) and 20(b) are plan and front views showing the clamping state of the upper clamping member 12a, the lower pivoting clamping member 12c, the bolt 12b, and the wing nut 12d at the intersection of the 20mm single-width siding member 3' and the channel material 11 placed on top of it. In the case of the 20mm single-width siding member 3', the inner protrusions 12c3, 12c3 of the lower pivoting clamping member 12c each engage with the engagement groove portion 32' surrounded by the groove wall panel 3b', lip piece 3c', and engagement piece 3d' of the single-width siding member 3', and the upper ends of the inner protrusions 12c3, 12c3 abut against the back side of the lip piece 3c' of the siding member 3', clamping the channel material 11 between the siding member 3' and the upper clamping member 12a.

[0053] <Summary of the ceiling equipment fixture 1 according to the embodiment of the present invention> As described above, the lip channel steel fastener 12 and ceiling equipment fixture 1 of the embodiment according to the present invention includes the U-shaped upper pressing bracket 12a having the upper plate 12a1 with the through hole 12a11 and the pair of side plates 12a2, 12a3, the bolt 12b having a shaft portion inserted into the through hole of the upper pressing bracket 12a and a head portion with an outer diameter larger than that of the shaft portion 12b1, and the bolt 12b is provided at the tip of the bolt 12b, and is inserted into the accommodation groove of the furring strip and rotates to abut against the underside of the lip piece, thereby clamping the channel materials 11, 11 between the furring strip and the upper pressing bracket 12a. and a wing nut 12d that screws onto a bolt 12b protruding from a through hole 12a11 of the upper clamping fixture 12a and rotates to attract the lower rotating clamp 12c located in the accommodation groove of the furring strip 3, 3', thereby clamping the channel material 11, 11 between the upper clamping fixture 12a and the furring strip 3, 3', and at least one of the short horizontal plates 12a3 of the upper clamping fixture 12a has a distance to the through hole 12a11 that is equal to or greater than the width of the channel material 11, so that the channel material 11 fits between the short horizontal plate 12a3 and the shaft 12b1 of the bolt 12b.

[0054] Therefore, when using the lip channel steel fixing device 12 to fix the channel material 11 placed on the furring strips 3, 3', the lower rotating clamp 12c, which has been previously attached to the upper clamping bracket 12a using the bolt 12b and wing nut 12d, is inserted into the accommodating groove portion 31, 31' of the furring strips 3, 3' and rotated, so that the lower rotating clamp 12c abuts against the engaging pieces 3d, 3d' of the furring strips 3, 3' and engages the furring strips 3, 3' from below, and the rotation of the wing nut 12d lifts up the furring strips 3, 3' so that the channel material 11 placed on the furring strips 3, 3' can be clamped between the upper clamping bracket 12a and the furring strips 3, 3'.

[0055] As a result, when attaching the repeater 2 to the rough siding materials 3, 3' that make up a suspended ceiling via the channel material 11 and the repeater mounting plate 13, the installation work must be carried out above the ceiling, above eye level, by climbing up on a stepladder or tripod, but the bolts 12b, wing nuts 12d, upper clamping bracket 12a, lower rotating clamping bracket 12c, etc. that make up the lip channel steel fixing device 12 can be assembled and integrated on the floor in advance, allowing the work to be carried out without climbing up on a stepladder or tripod, thereby improving work efficiency.

[0056] Furthermore, according to the lip channel steel fastener 12 of the present invention, by passing the shank 12b1 of the bolt 12b through the through hole 12a11 of the upper wall portion 12a1 of the upper clamp 12a and tightening it with a wing nut 12d, the channel material 11 can be clamped and fixed between the furring strips 3, 3' by the upper wall portion 12a1 of the U-shaped upper clamp 12a, and the channel material 11 can be pressed from both sides by the short horizontal plate 12a3 of the upper clamp 12a and the shank 12b1 of the bolt 12b, so that the channel material 11 can be securely attached to the furring strips 3, 3' and the number of items can be reduced by the U-shaped upper clamp fitting 12a.

[0057] In addition, in the lip channel steel fastener 12 and ceiling equipment fixture 1 of the embodiment of the present invention, the height H3 (see Figure 6(d)) of the short horizontal plate 12a3, whose distance to the through hole 2a11 in the upper clamp 12a is equal to or greater than the width of the channel material 11, which is the object to be fixed, is lower than the height H1 (see Figure 5(d)) of the channel material 11.

[0058] Therefore, when the upper clamping fitting 12a presses the channel material 11, which is the object to be fixed, from above, it is possible to press the channel material 11 against the furring strips 3, 3', so that the channel material 11 can be securely pressed against the furring strips 3, 3'.

[0059] Furthermore, in the lip channel steel fastener 12 and ceiling equipment mounting fixture 1 of the embodiment according to the present invention, the through hole 12a11 of the upper clamp 12a is provided at an eccentric position shifted from the center between a pair of horizontal plates 12a2, 12a3 on the upper plate 12a, and the distance to the through hole 12a11 of one short horizontal plate 12a3 is equal to or greater than the width of the channel material 11, while the distance to the through hole 12a11 of the other long horizontal plate 12a2 is less than the width of the channel material 11.

[0060] Therefore, it is possible to reduce the size of the U-shaped upper pressing fitting 12a that presses the channel material 11 from above and from the left and right, thereby reducing costs and improving work efficiency by reducing weight.

[0061] Furthermore, because through-hole 12a11 is positioned off-center between the pair of horizontal boards 12a2, 12a3 in top plate 12a1 of upper clamp fitting 12a, the orientation of long horizontal board 12a2 and short horizontal board 12a3 in upper clamp fitting 12a can be confirmed by touching bolt 12b, wing nut 12d, etc., inserted through through-hole 12a11. Therefore, even when working above the ceiling, where it is difficult to visually confirm the orientation of long horizontal board 12a2 and short horizontal board 12a3 in upper clamp fitting 12a, it is possible to quickly fix channel material 11 to the furring strips 3, 3', thereby improving workability.

[0062] In addition, in the lip channel steel fastener 12 and ceiling equipment mounting fixture 1 of the embodiment of the present invention, the height H2 of the other long horizontal plate 12a2 in the upper clamp 11 is higher than the height H3 of the short horizontal plate 12a3 and is the same as the height H1 of the channel material 11.

[0063] Therefore, even when working above the ceiling where it is difficult to visually confirm the orientation of the long horizontal boards 12a2 and short horizontal boards 12a3 in the upper clamp 12a, it is possible to recognize the orientation of the long horizontal boards 12a2 and short horizontal boards 12a3 in the upper clamp 12a by touching the height of the long horizontal boards 12a2 and short horizontal boards 12a3 with one's hand, making it possible to quickly fix the channel material 11 to the furring strips 3, 3' and improving workability.

[0064] Furthermore, since the height of the long horizontal plate 12a2 is the same as the height of the channel material 11, when the upper clamp 12a, the lower rotary clamp 12c, and the wing nut 12d are assembled to the bolt 12b in advance, it is not necessary to rotate the wing nut 12d more than necessary so that the distance between the upper plate 12a1 of the upper clamp 12a and the lower rotary clamp 12c becomes smaller than necessary compared to the height of the channel material 11, and this also improves workability.

[0065] In addition, in the lip channel steel fastener 12 and ceiling equipment fixture 1 of the embodiment according to the present invention, the ceiling equipment fixture 1 has an outer protrusion 12c2 and an inner protrusion 12c3 on the upper surface side of the lower rotation retainer 12c.

[0066] Therefore, when the furring strip 3, 3', which is a lip channel steel, has engaging pieces 3d, 3d' that fold back from the lip pieces 3c, 3c' and face the side surfaces 3b, 3b' and have engaging groove portions 32, 32', the outer protrusion 12c2 and the inner protrusion 12c3 engage with the engaging groove portions 32, 32' and when they are inserted into the accommodating groove portions 31, 31' of the furring strip 3, 3' of the lower rotating clamp 12c and rotated, the lower rotating clamp 12c is less likely to come out of the accommodating groove portions 31, 31' of the furring strip 3, 3', which also makes it possible to quickly fix the channel material 11 to the furring strip 3, 3', improving workability.

[0067] Furthermore, in the lip channel steel fastener 12 and ceiling equipment mounting fixture 1 of the embodiment according to the present invention, an outer protrusion 12c2 and an inner protrusion 12c3 are provided on the upper surface of the lower rotating clamp 12c at a predetermined interval in the short direction of the lower rotating clamp 12c, and the outer protrusion 12c2 and the inner protrusion 12c3 are each provided at positions with different intervals (distances) from the through hole 12c11.

[0068] Therefore, the most common types of lip channel steel used for suspended ceilings are the double-width rafter 3 with a width W of 50 mm and the single-width rafter 3' with a width W of 25 mm. In the case of the double-width rafter 3 with a width of 50 mm, as shown in Figure 17(a), the outer protrusions 12c2, 12c2 at both ends of the lower rotating retainer 12c engage with the engaging grooves 32 of the double-width rafter 3, and the single-width rafter 3' with a width of 25 mm. In the case of the furring strip 3', as shown in Figure 17(b), the inner protrusions 12c3, 12c3 on both ends of the lower pivot retainer 12c each engage with the engagement groove 32' of the single-width furring strip 3'. Therefore, even in the case of furring strips 3, 3' of different widths, the lower pivot retainer 12c is reliably prevented from slipping out of the accommodation groove 31, 31' of the furring strip 3, 3'. This also makes it possible to quickly fix the channel material 11 to the furring strip 3, 3', improving workability. Furthermore, there is no need to prepare two types of lower pivot retainers 12c to accommodate furring strips 3, 3' of different widths, thereby reducing costs.

[0069] In addition, in the lip channel steel fastener 12 and ceiling equipment mounting fixture 1 of the embodiment of the present invention, a hexagonal recess 12c4 is provided on the lower surface (bottom surface) of the lower rotation clamp 12c into which the hexagonal head 12b2 of the bolt 12b fits.

[0070] Therefore, the bolt 12b and the lower rotation clamp 12c rotate together around the shaft 12b1 of the bolt 12b, so there is no need to provide an inner metal fitting for co-rotation in addition to the rotating metal fitting as in Patent Document 1, which reduces costs.

[0071] In the above description of the embodiment, double-width and single-width furring strips 3, 3' have been used as examples of lip channel steel for fixing the channel material 11, which is the object to be fixed, and have engaging pieces 3d, 3d' that fold back from the tip of the lip pieces 3c, 3c' toward the channel plates 3a, 3a' and face the side surfaces 3b, 3b'. However, the present invention is not limited to this, and the lip channel steel fixing device 12 and ceiling equipment mounting device 1 of the embodiment of the present invention can also be applied to a normal lip channel steel 3" that does not have engaging pieces 3d, 3d' and has a bottom surface 3a" and a pair of side surfaces 3b", 3b" and lip pieces 3c", 3c" as shown in Figure 21(a).

[0072] In other words, in the case of the lip channel steel 3" shown in Figure 21(a), when the lower rotating clamp 12c of the lip channel steel fixing device 12 is placed in the receiving groove portion 31" of the lip channel steel 3" and rotated as shown in Figures 21(b) and (c), the outer protrusions 12c2, 12c2 on both ends of the lower rotating clamp 12c abut against the back side of the lip pieces 3c", 3c" of the lip channel steel 3" and push the lip channel steel 3" upward, so that the channel material 11, which is the object to be fixed, can be clamped and fixed from above and below between the lip channel steel 3" and the upper clamp 12a.

[0073] Furthermore, in the above embodiment, the upper pressure fitting 12a has been described as a metal fitting made of a U-shaped steel plate consisting of an upper plate 12a1 which is the upper wall portion and horizontal plates 12a2, 12a3 which are the horizontal wall portions, but the present invention is not limited to this, and it is sufficient if the fixing target part such as the channel material 11 can be fixed from three directions, namely from above and from the sides. Therefore, as long as the fixing device has an upper wall portion and a pair of horizontal walls, it is not limited to being made of metal, and it may of course be made of resin or the like.

[0074] In addition, in the above embodiment, the channel material 11 made of channel steel (channel steel) was used as an example of the object to be fixed, but the present invention is not limited to this, and the object to be fixed may be a steel plate or a steel pipe, and of course the object to be fixed may be made of a material other than metal, such as synthetic resin. Furthermore, while the lip channel steel fastener according to the present invention has been described as being used as a ceiling equipment fixture, the present invention is not limited to this, and the lip channel steel fastener may of course be used to fasten various objects other than ceiling equipment fixtures. [Explanation of symbols]

[0075] 1 Ceiling equipment mounting bracket 11 Channel material (fixed object) 11a Top plate 11a1 long hole 11b Side plate 12 Lip channel steel fastener 12a Upper presser foot (upper presser foot) 12a1 Upper plate (upper wall) 12a11 Through hole 12a2 long horizontal board (horizontal wall) 12a3 Short horizontal board (side wall part) 12b bolt 12b1 Shaft 12b2 Head 12c Lower rotating holder 12c1 Convex part 12c11 Through hole 12c2 Lateral process 12c3 Medial protrusion 12c4 recess 12c5 curved sides 12d Wing nut (clamping nut) 12d1 female screw hole 13 Repeater mounting plate 14a Repeater plate mounting bolt 14b Bracket mounting bolt 14c Outlet Mounting Bolt 2 repeaters 2a Bracket 2b Square outlet base 2c Angular type コンセント body 3,3',3” wild wood 3a,3a',3a” Trench bottom plate 3b,3b',3b” Trench wall panel 3c,3c',3c” Lip Film 3D, 3D series film 31,31' Reception Ditch 32,32' is the junction of the ditch.

Claims

1. A lip channel steel fastener includes at least a channel bottom plate, a pair of channel wall plates bent and extending from both sides of the bottom plate, and lip pieces bent inward from the tips of the pair of channel wall plates, and fastens an object to be fastened to a lip channel steel having an accommodation groove portion surrounded by these, an upper presser having an upper wall portion provided with a through hole and a pair of side walls extending in a curved manner from both sides of the upper wall portion; a bolt having a shaft portion inserted into the through hole of the upper holding tool and a head portion having an outer diameter larger than that of the shaft portion; a lower rotating clamp provided on the head side of the bolt, inserted into the accommodation groove of the lip channel steel and rotated to abut against the lower side of the lip piece, thereby clamping the object to be fixed between the lip channel steel and the upper clamp; a clamping nut that is threaded onto the shank of the bolt protruding from the through hole of the upper clamping tool and rotates to attract a lower rotating clamping tool located in the accommodation groove of the lip channel steel, thereby clamping the object to be fixed between the upper clamping tool and the lip channel steel; A lip channel steel fastener characterized in that the distance between at least one side wall portion of the upper retainer and the through hole is equal to or greater than the width of the object to be fixed, and the object to be fixed is fitted between the one side wall portion and the shank of the bolt passed through the through hole.

2. The lip channel steel fastener according to claim 1, A lip channel steel fastener, characterized in that the height of one of the side walls is lower than the height of the object to be fixed, and the distance to the through hole in the upper holding tool is equal to or greater than the width of the object to be fixed.

3. The lip channel steel fastener according to claim 1, The through hole of the upper retaining member is provided at a position offset from the center between the pair of side wall portions in the upper wall portion, and the distance to the through hole of one side wall portion is equal to or greater than the width of the object to be fixed, and the distance to the through hole of the other side wall portion is less than the width of the object to be fixed.

4. The lip channel steel fastener according to claim 3, A lip channel steel fastener, characterized in that the height of the other side wall portion of the upper clamp is higher than the height of the one side wall portion and is approximately the same as the height of the object to be fixed.

5. The lip channel steel fastener according to claim 1, The lip channel steel further has a pair of engaging pieces folded back in an L-shape from the tip ends of the pair of lip pieces toward the channel bottom plate, A fixing device for lip channel steel, characterized in that a protrusion is provided on the upper surface of each of the longitudinal ends of the lower rotating clamp, which fits into the engagement groove portion between the groove wall plate of the lip channel steel groove and the engagement piece.

6. The lip channel steel fastener according to claim 5, A lip channel steel fastener characterized in that the protrusions provided on the upper surface of both longitudinal ends of the lower pivot clamp are provided at multiple locations spaced apart in the short direction of the lower pivot clamp, and are provided at positions with different distances from the shank of the bolt.

7. The lip channel steel fastener according to claim 1, A lip channel steel fastener characterized in that a through hole through which the shank of the bolt passes is provided at the longitudinal center of the lower rotating clamp, and a recess into which the head of the bolt fits is provided on the underside of the through hole, and the bolt and the lower rotating clamp are configured to rotate together around the shank of the bolt.

8. A ceiling equipment fixture for installing an equipment mounting plate to which ceiling equipment is attached using the lip channel steel fastener according to any one of claims 1 to 7, The lip channel steel is a rough joist material that constitutes a suspended ceiling, The fixing object is a channel material having a through hole for passing the bolt therethrough, to which the equipment mounting plate is fixed, and which is installed on a plurality of the furring members at predetermined intervals, The lip channel steel fastener is used to fasten the rough siding material and the channel material installed on top of it.

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