Metal fitting unit and auxiliary tool

Abstract

To make it possible to readily confirm that fastening operation is properly performed to a fastening bolt on a metal fitting including a fixing part that is fixed by the fastening operation to the fastening bolt.SOLUTION: A metal fitting unit (1) includes an auxiliary tool (6) used together with a metal fitting (2) including a fixing part (5) that is fixed by fastening operation to a fastening bolt (51). The auxiliary tool (6) includes a shielding part (65) for forming a shielded space (C). While the shielding part (65) is disposed to the fixing part (5), before and after the fastening operation, a tip (51f) of the fastening bolt (51) is configured to pass through the shielded space (C) and go to the outside of the shielded space (C).SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a fitting unit and an auxiliary tool. [Background technology]

[0002] Pipe support fittings (an example of fittings) are used to suspend and support pipes connected to water facilities, air conditioning facilities, etc., on structures such as slabs that constitute the ceiling of a building. Such pipe support fittings are disclosed, for example, in JP 2022-75177 A (Patent Document 1).

[0003] The pipe support fitting (pipe hanging fitting 1) of Patent Document 1 comprises an attachment part (tank buckle 4) attached to a hanging rod-like body (hanging bolt 3) suspended from a structure (construction), and a support part connected to the attachment part and supporting the pipe (pipe 2). The attachment part and the support part are fixed to each other by fastening bolts (bolts 6) at fixing parts (hanging parts 12a, 12b, fastening parts 12a, 12b) where they overlap each other.

[0004] Furthermore, the pipe support fitting of Patent Document 1 also uses an auxiliary device (anti-fall-off sheet 9) whose one end is inserted into the head side of the fastening bolt and whose other end is engaged with the tip side of the fastening bolt, thereby preventing the fastening bolt and the fastening nut (nut 7) screwed thereto from falling off. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2022-75177 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the metal fitting unit equipped with the pipe support metal fitting and the auxiliary tool in Patent Document 1 only prevents the fastening bolt and the fastening nut from falling off, assuming that the fastening bolt is firmly fastened, but does not guarantee that the fastening operation of the fastening bolt has been performed properly. In particular, when working at a high place such as near a ceiling, workers often look up while working, which makes it difficult to visually confirm the completion of the fastening operation.

[0007] It is therefore desirable to be able to easily confirm whether the fastening bolt has been properly tightened in a metal fitting having a fixing portion that is fixed by the tightening operation of a fastening bolt. [Means for solving the problem]

[0008] The fitting unit according to the present invention comprises: A fitting unit including a fitting having a fixing portion that is fixed by a fastening operation of a fastening bolt, and an auxiliary tool that is used together with the fitting, The auxiliary tool includes a shielding portion that forms a shielded space, With the shielding portion disposed on the fixing portion, the tip of the fastening bolt is configured to pass through the shielded space and exit the shielded space before and after the fastening operation.

[0009] In addition, the assisting tool according to the present invention is An auxiliary tool used with a metal fitting having a fixing part that is fixed by a fastening operation of a fastening bolt, A shielding portion is provided to form a shielded space, With the shielding portion disposed on the fixing portion, the tip of the fastening bolt is configured to pass through the shielded space and exit the shielded space before and after the fastening operation.

[0010] According to these configurations, before and after the fastening operation of the fastening bolt, the tip of the fastening bolt passes through the shielded space in the shielding part of the auxiliary tool (including the case where the fastening operation is performed from a state where it is contained in the shielded space) and goes out of the shielded space. Therefore, since the tip of the fastening bolt can be seen without being blocked by the shielding part, it can be easily confirmed that the fastening operation of the fastening bolt has been performed properly.

[0011] Preferred embodiments of the present invention will be described below. However, the scope of the present invention is not limited to the preferred embodiments described below.

[0012] In one embodiment, The auxiliary tool further includes a lid portion that is swingably connected to the shielding portion and is capable of covering the shielded space, It is preferable that, before and after the fastening operation, the lid portion changes its position between a closed position in which the lid portion covers the shielded space and an open position in which the lid portion is pushed up by the tip of the fastening bolt.

[0013] According to this configuration, the lid changes its posture from the closed posture to the open posture before and after the fastening operation of the fastening bolt. Therefore, it is easier to confirm that the fastening operation of the fastening bolt has been performed properly based on the posture change of the lid from the closed posture to the open posture, which is larger than the degree of change when the tip of the fastening bolt becomes visible.

[0014] In one embodiment, In the fixing portion, the fastening bolt is screwed into a fastening nut, The shielding portion is preferably disposed along an outer surface of the fastening nut.

[0015] According to this configuration, the shielding part can be attached to the fastening nut from the outside. Since the fastening bolt is screwed into the fastening nut, the shielding space formed inside the shielding part can be used as is to easily perform the above-mentioned completion confirmation.

[0016] In one embodiment, It is preferable that the auxiliary tool is attached to the fixed part in a non-rotatable state.

[0017] According to this configuration, the fastening nut is held by the shielding portion of the auxiliary tool attached to the fixed portion, so that the fastening nut is prevented from rotating relative to the fixed portion, and therefore the fastening operation of the fastening bolt and the fastening nut can be easily performed.

[0018] In one embodiment, the fitting is a piping support fitting including an attachment portion attached to a hanging rod-like body suspended from a structure, and a support portion connected to the attachment portion and supporting a piping, the connection portion between the attachment portion and the support portion being the fixed portion; the support portion has an upper support portion disposed above the piping and connected to the mounting portion, and a lower support portion connected to the upper support portion so as to be swingable and supporting the piping from below, the upper support portion and the lower support portion being configured to surround the entire circumference of the piping, The upper support portion is composed of a pair of divided bodies, It is preferable that the auxiliary tool is attached across the pair of the divided bodies.

[0019] In this configuration, when the upper support part, which is an element on the support part side that constitutes the fixed part, is composed of a pair of divided bodies, there is a risk that the pair of divided bodies will twist around the fastening bolt. If such twisting occurs, the upper support part and the lower support part will not be able to surround the entire circumference of the pipe. In this regard, with the above configuration, the auxiliary tool is attached across the pair of divided bodies, so that twisting of the pair of divided bodies can be prevented. Therefore, the upper support part and the lower support part can surround the entire circumference of the pipe and properly support it.

[0020] Further features and advantages of the present invention will become more apparent from the following description of exemplary and non-limiting embodiments, which are given with reference to the drawings. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a front view of a pipe support structure using a metal fitting unit according to an embodiment of the present invention; [Diagram 2] Exploded perspective view of the metal fitting unit [Diagram 3] Enlarged perspective view of the vicinity of the fixed portion [Figure 4] Plan view of the fixing part (partial cross section) [Diagram 5] VV cross section in Figure 4 [Figure 6] Side view of the fixing part before fastening operation [Figure 7] Side view of the fixing part after fastening operation [Figure 8] FIG. 13 is a perspective view of a metal fitting unit according to another embodiment. [Figure 9] FIG. 13 is a perspective view of a metal fitting unit according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] An embodiment of the metal fitting unit will be described with reference to the drawings. The metal fitting unit 1 of this embodiment includes a pipe support fitting 2 for supporting a pipe P in a suspended state on a structural body S, and an auxiliary tool 6 used together with the pipe support fitting 2. As shown in FIG. 1, the pipe support fitting 2 is attached to a hanging bolt B suspended from a structural body S, such as a slab constituting a ceiling, and supports the pipe P in a horizontally suspended state. In this embodiment, the pipe support fitting 2 corresponds to the "fitting". Also, as shown in FIGS. 2 and 3, the auxiliary tool 6 is attached to the pipe support fitting 2 and used together with the pipe support fitting 2.

[0023] The hanging bolts B are arranged along the installation direction of the pipe P. A plurality of hanging bolts B are installed at a predetermined interval at a plurality of locations along the installation direction of the pipe P, and the pipe P is suspended and supported along the entire installation direction by the pipe support fittings 2 attached to each hanging bolt B. As the hanging bolts B, a fully threaded bolt that is threaded along its entire length may be used, or a double-threaded bolt that is threaded only at both ends may be used. In this embodiment, the hanging bolt B corresponds to a "hanging rod-shaped body."

[0024] 1 and 2, the pipe support fitting 2 includes an attachment portion 20 that is attached to a hanging bolt B, and a support portion 30 that supports a pipe P. The pipe support fitting 2 is configured such that the attachment portion 20 and the support portion 30 are connected to each other at the fixed portion 5 by a fastening member 50. The fastening member 50 includes a fastening bolt 51 and a fastening nut 53 that is screwed thereto. That is, the pipe support fitting 2 is configured such that the fastening bolt 51 is screwed into the fastening nut 53 by a fastening operation at the fixed portion 5, which is a connection point between the attachment portion 20 and the support portion 30, thereby connecting the attachment portion 20 and the support portion 30.

[0025] The mounting portion 20 is a portion for mounting the support portion 30 to a suspension bolt B suspended from the structure S. The mounting portion 20 in this embodiment is configured by a turn buckle 21. The turn buckle 21 has a mounting plate 22 and a pair of connecting plates 23 extending downward from the mounting plate 22.

[0026] The mounting plate 22 is a portion that is attached to the hanging bolt B. The mounting plate 22 is formed in a rectangular shape. An insertion hole 22a is formed through the center of the mounting plate 22. A flanged nut N is inserted into this insertion hole 22a from the inside. The inner diameter of the insertion hole 22a is smaller than the flange of the flanged nut N, and the mounting part 20 is attached to the hanging bolt B in a form supported by the flange of the flanged nut N that screws onto the hanging bolt B. Note that instead of the flanged nut N, the mounting part 20 may be attached to the hanging bolt B by, for example, an upper and lower double nut.

[0027] The connecting plate 23 is a portion that is connected to the support portion 30. In this embodiment, a pair of connecting plates 23 are provided so as to extend downward from a pair of opposite sides of the rectangular mounting plate 22. Each of the pair of connecting plates 23 is bent at two points to form a gentle crank shape so that the distance between the lower end side (the side opposite the mounting plate 22) is narrower than the upper end side (the side close to the mounting plate 22). An insertion hole 23a is formed through the connecting plate 23 near the lower end. A shaft portion 51B of a fastening bolt 51 that constitutes the fastening member 50 is inserted into the insertion hole 23a.

[0028] The support part 30 is a part connected to the attachment part 20 to support the pipe P. The support part 30 in this embodiment has a structure divided mainly into upper and lower parts from a functional standpoint, and has an upper support part 31 disposed above the pipe P, and a lower support part 41 that supports the pipe P from below.

[0029] The upper support part 31 is disposed above the pipe P. The upper support part 31 covers the pipe P from above. The upper support part 31 in this embodiment has a structure divided into left and right parts, and is composed of a pair of division bodies, a first division body 32 and a second division body 36. The first division body 32 in this embodiment is configured to cover the pipe P from above to the sides. Unlike the first division body 32, the second division body 36 is configured to mainly cover only the upper part of the pipe P.

[0030] 2, the first split body 32 has a flat plate portion 33 and a downward extending portion 34. These are integrally formed by, for example, pressing using a strip-shaped steel plate.

[0031] The flat plate portion 33 is a flat plate-like portion located on the upper side of the first division 32, and is a portion that is connected to the mounting portion 20. The flat plate portion 33 is formed in a rectangular shape (specifically, a rectangular shape). The flat plate portion 33 is arranged along the up-down direction. An insertion hole 33a is formed through the flat plate portion 33 near the upper end portion. A shaft portion 51B of a fastening bolt 51 that constitutes the fastening member 50 is inserted into this insertion hole 33a.

[0032] The downward extension portion 34 extends downward from the lower end of the flat plate portion 33 in a state roughly following the outer shape of the pipe P. In this embodiment, the downward extension portion 34 is configured by a combination of a portion curved in an arc shape and a portion extending in a straight line. A locking piece 34A is cut and raised toward the inside near the lower end of the downward extension portion 34. This locking piece 34A locks into a through hole 44a formed in the enlarged diameter portion 44 of the lower support portion 41. In addition, an engagement guide portion 34B is provided on the downward extension portion 34 on the tip side of the locking piece 34A. The engagement guide portion 34B is gradually inclined so as to be gradually outward toward the tip. The engagement guide portion 34B guides the engagement between the locking piece 34A and the through hole 44a.

[0033] The second divided body 36 has a flat portion 37, a curved portion 38, and a loop portion 39. These are integrally formed by using a strip-shaped steel plate, for example, by pressing.

[0034] The flat plate portion 37 is a flat plate-like portion located on the upper side of the second division body 36, and is a portion that is connected to the mounting portion 20 together with the flat plate portion 33 of the first division body 32. The flat plate portion 37 is formed in a rectangular shape (specifically, a rectangular shape). The flat plate portion 37 is arranged along the up-down direction. An insertion hole 37a is formed through the flat plate portion 37 near the upper end portion. A shaft portion 51B of a fastening bolt 51 constituting the fastening member 50 is inserted into this insertion hole 37a.

[0035] The curved portion 38 extends in an arc shape from the lower end of the flat plate portion 37. In this embodiment, the curved portion 38 is formed in an arc shape having a central angle of approximately 60° when viewed from the front.

[0036] The loop portion 39 is provided at the lower end of the curved portion 38, continuing from the curved portion 38. The loop portion 39 is looped on the outer surface side of the curved portion 38. One loop portion 39 is provided at the center portion of the lower end of the curved portion 38, excluding both side portions in the width direction. Two loop portions 43 of the lower support portion 41 are arranged on both sides of the loop portion 39.

[0037] The lower support part 41 is swingably connected to the upper support part 31. In this embodiment, the lower support part 41 is swingably connected to the second division body 36 of the first division body 32 and the second division body 36, which are a pair of division bodies constituting the upper support part 31. With this swing, the position of the support part 30 can be changed between an open-ring position in which the upper support part 31 and the lower support part 41 are open, and a closed-ring position in which the upper support part 31 and the lower support part 41 are closed.

[0038] 2, the lower support portion 41 has a support body portion 42, a loop portion 43, and an expanded diameter portion 44. These are integrally formed by using a strip-shaped steel plate, for example, by pressing or the like.

[0039] The support body 42 is a main part of the lower support part 41 that supports the pipe P. The support body 42 is formed to be curved in an arc shape. The support body 42 supports the pipe P in a state in which it abuts against the pipe P from below. When the support part 30 is in the closed ring position, the lower support part 41, together with the upper support part 31, surrounds the pipe P all around, and supports the pipe P from below.

[0040] The loop portion 43 is provided on the upper end of the support body portion 42, continuing from the support body portion 42. The loop portion 43 is looped on the outer surface side of the support body portion 42. Two loop portions 43 are provided on both sides of the upper end of the support body portion 42 in the width direction. The loop portion 39 of the second division body 36 of the upper support portion 31 is disposed between the pair of loop portions 43. A pivot member 46 is inserted between the two loop portions 43 of the lower support portion 41 and the loop portion 39 of the second division body 36. Examples of the pivot member 46 include rivets, pins with a pull-out prevention structure, and loosely fastened bolts and nuts, and a rivet is used in this embodiment.

[0041] The expanded diameter portion 44 is curved in an arc shape with a larger diameter than other portions of the support body portion 42, and is provided on the tip side of the support body portion 42. The expanded diameter portion 44 is offset outward by approximately several plate thicknesses from other portions of the support body portion 42, thereby forming a large-diameter arc shape. A through hole 44a is formed in the expanded diameter portion 44. A locking piece 34A provided on the first division body 32 constituting the upper support portion 31 engages with this through hole 44a.

[0042] Through hole 44a formed in lower support part 41 and locking piece 34A provided on upper support part 31 engage with each other, thereby appropriately maintaining the closed position of support part 30. Through hole 44a and locking piece 34A that engage with each other constitute a position maintaining mechanism that maintains support part 30 in the closed position.

[0043] 1 to 3, the auxiliary tool 6 is attached to the connection portion (fixed portion 5) between the attachment portion 20 and the support portion 30. The auxiliary tool 6 is attached from the outside to the fixed portion 5 (the connection portion between the attachment portion 20 and the support portion 30, where the flat plate portions 33, 37 and the connecting plates 23, 23 overlap each other). The auxiliary tool 6 can be integrally formed by injection molding using, for example, a resin material.

[0044] As shown in FIGS. 2 to 5, the assisting tool 6 has a base plate 61, an arm portion 63, a locking claw 64, a shielding portion 65, and a lid portion 68. As shown in FIG.

[0045] The base plate 61 is formed in a flat plate shape that fits along the outer surface of the flat plate portion 33 of the first divided body 32 that constitutes the upper support portion 31. The base plate 61 is formed in a hexagonal shape that is a combination of a horizontally long rectangle and a trapezoid integrated above it. An insertion hole 61a is formed through the base plate 61. The insertion hole 61a is formed in a regular hexagonal shape that corresponds to the outer shape of the fastening nut 53 that constitutes the fastening member 50. The shaft portion 51B of the fastening bolt 51 that constitutes the fastening member 50 is also inserted through this insertion hole 61a.

[0046] A bent piece 62 is provided on the upper end of the base plate 61. The bent piece 62 is formed so as to bend at a substantially right angle from the upper end of the base plate 61. The bent piece 62 is also formed in a straight line along the side of the upper end of the base plate 61. When the auxiliary tool 6 is attached to the fixed part 5, the bent piece 62 is engaged with the upper end of the flat plate part 33 of the first divided body 32 constituting the upper support part 31, thereby serving to position the auxiliary tool 6 in the up-down direction with respect to the fixed part 5.

[0047] A pair of arm portions 63 are provided so as to extend from both ends of the base plate 61 in the width direction. The pair of arm portions 63 each extend at a substantially right angle from the base plate 61 and are arranged parallel to each other. The length of the arm portion 63 is longer than the distance between the flat plate portions 33, 37 of the first division body 32 and the second division body 36 constituting the upper support part 31. A hook-shaped locking claw 64 is formed at the tip end (the end opposite to the base plate 61) of the pair of arm portions 63. This locking claw 64 locks onto the outer surface of the flat plate portion 37 of the second division body 36 when the auxiliary tool 6 is attached to the fixing part 5.

[0048] In this embodiment, protruding pieces 63A protruding inward are formed on the inner surfaces (sides facing each other) of the pair of arm portions 63. The protruding pieces 63A are formed in the up-down direction at a position spaced apart from the base plate 61 by the thickness of the flat plate portion 33. When the auxiliary tool 6 is attached to the fixing portion 5, the protruding pieces 63A engage with the inner surface of the flat plate portion 33 of the first divided body 32.

[0049] The shielding portion 65 is provided on the surface of the base plate 61 opposite to the arm portion 63. The shielding portion 65 of this embodiment is formed in a substantially regular hexagonal cylindrical shape corresponding to the shape of the insertion hole 61a, and a shielding space C is formed inside the shielding portion 65. The fastening nut 53 constituting the fastening member 50 is fitted inside the shielding portion 65, so that the shielding portion 65 is disposed along the outer surface of the fastening nut 53. The height of the wall portion of the shielding portion 65 (height including the thickness of the base plate 61) is set to be longer than the difference between the shaft portion 51B of the fastening bolt 51 and the interval between the flat plate portions 33, 37 before the fastening bolt 51 is fastened. In addition, the height of the wall portion of the shielding portion 65 is set to be shorter than the difference between the shaft portion 51B of the fastening bolt 51 and the interval between the flat plate portions 33, 37 after the fastening bolt 51 is fastened.

[0050] A notch 66 cut into a substantially U-shape is formed in the upper wall of the shielding part 65. A support 67 extending in the same direction as the shielding part 65 is provided in this notch 66, and a regular hexagonal lid 68 capable of covering the shielded space C inside the shielding part 65 is provided at the tip of the support 67. In this embodiment, the support 67 and the lid 68 are substantially perpendicular to each other. The lid 68 is connected to the shielding part 65 via the support 67 so as to be freely swingable around the tip of the support 67 as an axis. In this embodiment, the term "freely swingable" is a concept that includes irreversible swinging, and does not necessarily require the lid 68 to return to its original position after being deformed once.

[0051] The auxiliary device 6 of this embodiment is designed to simultaneously perform three functions: facilitating the fastening operation of the fastening bolt 51, optimizing the positional relationship of the pair of partitions 32, 36 that constitute the upper support part 31, and facilitating confirmation of completion of the fastening operation of the fastening bolt 51.

[0052] The first function is to facilitate the fastening operation of the fastening bolt 51. The auxiliary tool 6 is attached in a state where it cannot rotate with respect to the flat plate portion 33 (fixed portion 5) of the first divided body 32 by engaging the flat plate portion 33 from both sides with the base plate 61 and the protruding pieces 63A of the pair of arm portions 63. The fastening nut 53 is fitted inside the shielding portion 65 integrated with the base plate 61 in a state where it fits snugly against the inner wall of the shielding portion 65. Therefore, the fastening nut 53 is also held in a state where it cannot rotate with respect to the flat plate portion 33 (fixed portion 5) of the first divided body 32 by the auxiliary tool 6. This eliminates the need for the worker to directly hold the fastening nut 53, and allows the worker to easily perform the fastening work by simply operating the fastening bolt 51.

[0053] The second function is to optimize the positional relationship of the pair of divided bodies 32, 36. The auxiliary tool 6 has a base plate 61 and a pair of arm parts 63, and has a U-shape as a whole in a plan view. When the base plate 61 is in contact with the flat plate part 33 of the first divided body 32 from the outside, the locking claws 64 provided at the tip parts of the pair of arm parts 63 lock with the flat plate part 37 of the second divided body 36 from the outside. In this way, the auxiliary tool 6 is attached across the pair of divided bodies 32, 36, so that it is possible to prevent the first divided body 32 and the second divided body 36 from twisting around the shaft part 51B of the fastening bolt 51. Therefore, it is possible to optimize the positional relationship of the entire support part 30, including the lower support part 41 connected to the second divided body 36 so as to be able to swing freely, and it is possible to appropriately change the position between the open position and the closed position.

[0054] The third function is to facilitate confirmation of the completion of the fastening operation of the fastening bolt 51. The auxiliary tool 6 has a shielding portion 65 that forms a shielded space C inside, and the height of the wall portion of the shielding portion 65 is set to be longer than the difference between the shaft portion 51B of the fastening bolt 51 and the distance between the flat plate portions 33, 37 before the fastening bolt 51 is fastened. Therefore, before the fastening operation of the fastening bolt 51 is performed, as shown in Fig. 6, the tip 51f of the shaft portion 51B of the fastening bolt 51 is contained in the shielded space C and cannot be seen from the outside. Furthermore, the lid portion 68 is in a closed position that covers the shielded space C from the outside.

[0055] Furthermore, the height of the wall of the shielding portion 65 is set to be shorter than the difference between the shaft portion 51B of the fastening bolt 51 and the distance between the flat plate portions 33, 37 (the total thickness of the flat plate portions 33, 37 and the connecting plates 23, 23) after the fastening bolt 51 is fastened. Therefore, after the fastening operation of the fastening bolt 51 is performed, the tip 51f of the fastening bolt 51 protrudes outside the shielded space C and can be seen from the outside, as shown in Fig. 7. Furthermore, the lid portion 68 is pushed up by the tip 51f of the fastening bolt 51 and takes an open position.

[0056] In this way, before and after the fastening operation of the fastening bolt 51, the tip 51f of the shaft 51B of the fastening bolt 51 changes from a state contained within the shielded space C to a state protruding outward, and this is further amplified and visualized by the change in posture of the lid portion 68 from a closed posture to an open posture. Therefore, it is easy to confirm that the fastening operation of the fastening bolt 51 has been completed. Furthermore, when the fitting unit 1 of this embodiment is installed in a high position such as near a ceiling, after construction, it can be easily confirmed from below (from the floor) that the fastening operation of the fastening bolt 51 has been properly completed.

[0057] In particular, since the lid portion 68 is connected to the shielded space C at the upper side, after the fastening operation of the fastening bolt 51 is completed, the tip 51f of the fastening bolt 51 is visible on the front side of the lid portion 68 in the open position when viewed from below. Therefore, the completion of the fastening operation can be accurately and easily confirmed from below.

[0058] Considering that high places such as near the ceiling are generally dark, the auxiliary tool 6 may be colored in a color that contrasts highly with black, such as yellow, pink, or light blue. The auxiliary tool 6 may be colored by mixing a coloring agent during molding, or by applying paint after molding. In this case, only a part of the auxiliary tool 6 may be colored, for example, only the front or back surface of the lid part 68, or both. Also, for example, only the outer surface or inner surface of the shielding part 65, or both, may be colored, or only the shielding part 65 and the lid part 68 may be colored.

[0059] Other embodiments (1) In the above embodiment, the auxiliary tool 6 has the lid portion 68, and the lid portion 68 changes its position from a closed position to an open position before and after the fastening operation of the fastening bolt 51. However, the present invention is not limited to such a configuration, and the auxiliary tool 6 does not necessarily have to have the lid portion 68. Even in this case, the completion of the fastening operation can be easily confirmed based on the fact that the tip 51f of the fastening bolt 51 becomes visible from the outside before and after the fastening operation of the fastening bolt 51. In this case, for example, a thin film may be provided on the shielding portion 65 so as to cover the shielded space C.

[0060] (2) In the above embodiment, a configuration has been described as an example in which the lid portion 68 is connected to the shielded space C at the upper side. However, the present invention is not limited to such a configuration, and the lid portion 68 may be connected to the shielded space C at the upper side or at the side.

[0061] (3) In the above embodiment, the fastening nut 53 is fitted in the shielding portion 65 of the auxiliary tool 6 in a state where it fits snugly. However, the present invention is not limited to such a configuration, and the shielding portion 65 may be arranged along the outer surface of the fastening nut 53 to such an extent that the fastening nut 53 is prevented from rotating together. Furthermore, the prevention of the fastening nut 53 from rotating together is not an essential function, and the shielding portion 65 may be formed, for example, in a cylindrical shape having an inner surface circumscribing the fastening nut 53. Alternatively, the fastening nut 53 may not be used, and a tap may be cut in the insertion hole 33a of the flat plate portion 33, and the fastening bolt 51 may be fastened to the tap. In this case, the shielding portion 65 may be formed simply so that the shielded space C is formed inside. In such a case, the fastening bolt 51 may be configured to pass through the shielded space C from a state where the tip 51f of the fastening bolt 51 is outside the shielded space C before and after the fastening operation, and to go outside the opposite side of the shielded space C.

[0062] (4) In the above embodiment, an example has been described in which the auxiliary tool 6 has the base plate 61 and the pair of arm portions 63 and is attached across the pair of segments 32, 36. However, the present invention is not limited to such a configuration, and the auxiliary tool 6 does not necessarily have to have the pair of arm portions 63. Even in this case, it is possible to achieve at least two functions: facilitating the fastening operation of the fastening bolt 51 and facilitating confirmation of completion of the fastening operation of the fastening bolt 51.

[0063] (5) The specific configuration of the mounting portion 20 described in the above embodiment is merely an example and is not limited to such a configuration. For example, the mounting portion 20 may be configured as an L-shaped bent plate or the like.

[0064] (6) The specific configuration of the support part 30 described in the above embodiment is merely an example and is not limited to such a configuration. For example, the support part 30 may include two lower support parts 41, and the lower support parts 41 may be connected to both the first division body 32 and the second division body 36 constituting the upper support part 31 so as to be able to swing. The support part 30 may be composed of a pair of division bodies connected to be able to be opened and closed around a hinge part arranged below the axis of the pipe P. Alternatively, the support part 30 may be composed of a pair of independent division bodies that can be opened and closed by tilting or sliding.

[0065] (7) In the above embodiment, the fitting unit 1 including the pipe support fitting 2 for supporting the pipe P in a suspended manner on the structural body S and the auxiliary tool 6 used therewith has been described as an example. However, the present invention is not limited to such a configuration, and can be similarly applied to a fitting unit 1 including other fittings. As another example, Figs. 8 and 9 show an example in which an auxiliary tool 6 is used together with a cross-connecting fitting 2A for preventing the vibration of a ceiling-mounted indoor unit of an air conditioner. This cross-connecting fitting 2A connects a hanging bolt B suspended from the structural body S to two brace bolts R that cross the hanging bolt B at a corner portion. The cross-connecting fitting 2A includes a first base fitting 81, a second base fitting 82, and two clamping fittings 83. The fastening bolt 51 is fastened at the fixing portion 5, so that the hanging bolt B is fixed between the first base fitting 81 and the second base fitting 82, and the brace bolts R are fixed between the first base fitting 81 and the first clamping fitting 83 and between the second base fitting 82 and the second clamping fitting 83, respectively. In this example, the cross connection fitting 2A corresponds to the “fitting.” Even with this type of cross connection fitting 2A, by using the auxiliary tool 6 in combination, it is possible to easily confirm the completion of the fastening operation of the two fastening bolts 51.

[0066] (8) The specific configuration of the auxiliary tool 6 described in the above embodiment may be different depending on the size of the pipe support fitting 2, etc. The pipe support fitting 2 may have a plurality of variations depending on the plate thickness of the upper support part 31 and the insertion holes 33a, 37a, etc., and a dedicated auxiliary tool 6 may be prepared for each variation. In this case, the upper support part 31 and the auxiliary tool 6 may be provided with an erroneous attachment prevention mechanism that allows the attachment of the auxiliary tool 6 to the upper support part 31 only in the case of an appropriate combination. The erroneous attachment prevention mechanism may include, for example, a notch formed on one of the upper support part 31 and the auxiliary tool 6, and a claw portion formed on the other so as to engage with the notch, and at least one of the formation position and shape of the notch portion and the claw portion may be configured to be different for each variation. Alternatively, the auxiliary tool 6 may be colored in a different color for each variation so that the worker can easily recognize the appropriate combination.

[0067] (9) The configurations disclosed in the above-mentioned embodiments (including the above-mentioned embodiments and other embodiments; the same applies below) can be applied in combination with configurations disclosed in other embodiments, as long as no contradiction occurs. As for other configurations, the embodiments disclosed in this specification are illustrative in all respects and can be appropriately modified within the scope of the present disclosure. [Explanation of symbols]

[0068] 1 Metal fitting unit 2 Pipe support fittings (fittings) 2A Cross-connecting fittings (fittings) 5 Fixed part 6. Assistive devices 20 Mounting part 30 Support part 31 Upper support part 32 First divided body (divided body) 36 Second split body (split body) 41 Lower support part 50 Fastening members 51 Fastening bolt 51f Tip 53 Fastening nut 65 Shielding part 68 Lid S structure B Suspension bolt (suspension rod) P piping C Covered space

Claims

1. A fitting unit including a fitting having a fixing portion that is fixed by a fastening operation of a fastening bolt, and an auxiliary tool that is used together with the fitting, The auxiliary tool includes a shielding portion that forms a shielded space, The metal fitting unit is configured such that, with the shielding portion disposed on the fixing portion, the tip of the fastening bolt passes through the shielded space and exits the shielded space before and after the fastening operation.

2. The auxiliary tool further includes a lid portion that is swingably connected to the shielding portion and is capable of covering the shielded space, The metal fitting unit according to claim 1, wherein the position of the lid portion changes between a closed position in which the lid portion covers the shielded space and an open position in which the lid portion is pushed up by the tip of the fastening bolt before and after the fastening operation.

3. In the fixing portion, the fastening bolt is screwed into a fastening nut, The metal fitting unit according to claim 1 , wherein the shielding portion is disposed along an outer surface of the fastening nut.

4. The fitting unit according to claim 3, wherein the auxiliary tool is attached in a non-rotatable state to the fixed part.

5. the fitting is a piping support fitting including an attachment portion attached to a hanging rod-like body suspended from a structure, and a support portion connected to the attachment portion and supporting a piping, the connection portion between the attachment portion and the support portion being the fixed portion; the support portion has an upper support portion disposed above the piping and connected to the mounting portion, and a lower support portion connected to the upper support portion so as to be swingable and supporting the piping from below, the upper support portion and the lower support portion being configured to surround the entire circumference of the piping, The upper support portion is composed of a pair of divided bodies, The fitting unit according to any one of claims 1 to 4, wherein the auxiliary tool is attached across the pair of the divided bodies.

6. An auxiliary tool used with a metal fitting having a fixing part that is fixed by a fastening operation of a fastening bolt, A shielding portion is provided to form a shielded space, An auxiliary tool configured such that, when the shielding portion is disposed on the fixing portion, the tip of the fastening bolt passes through the shielded space and exits the shielded space before and after the fastening operation.

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