JP5295306B2 - Brace fixing bracket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brace fixing metal fitting capable of fixing a brace for diagonal reinforcement which connects and reinforces the space between a hanging bolt suspended from the slab on the ceiling side of a building and a ceiling-plate retaining frame hanging from the hanging bolt more securely and efficiently than before, while setting a mounting angle freely within an appropriate range according to the earthquake-resistant standards. <P>SOLUTION: The brace fixing metal fitting has an upper fixing metal fitting 11 for fixing the upper end of the brace 4. The upper fixing metal fitting 11 is provided with a hook member 12 which is engaged so as to clasp the hanging bolt 2, a strap bolt 13 of which one end is fixed to the brace 4, and a connecting member 14 which the bolt part 13b formed on the other end side of the strap bolt 13 is screwed to and inserted to. The hook member 12 and the connecting member 14 are connected to each other through the medium of a rivet 15 so that they can swing freely. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a brace fixing bracket used for fixing a brace as an oblique reinforcing material used for suppressing shaking of a ceiling of a building when an earthquake occurs.

  Conventionally, as shown in FIG. 14, a suspension bolt 2 suspended from the lower end of a slab 1 provided on the ceiling side and a suspension bolt 2 are suspended to suppress shaking of the ceiling of the building when an earthquake occurs. It is obliged by the seismic standards of the industry to connect and reinforce with the brace 4 between the frame 3 for holding the suspended ceiling board material.

  In this case, the brace 4 is diagonally reinforced by firmly fixing the upper end side to the suspension bolt 2 and the lower end side to the frame 3 in the left and right direction of the ceiling and in the front and rear direction. The shaking in each direction is surely suppressed.

  Conventionally, as a method of fixing the upper end side of the brace 4 to the suspension bolt 2 and the lower end side to the frame 3, welding work in the field has been performed, but such welding work has individual differences in terms of technology. As a result, a uniform result cannot always be obtained, and it is necessary to perform on-site construction at a high place. Therefore, there is a problem in that not only is there a problem in safety, but extra time and labor are required.

  Therefore, in recent years, in order to achieve no welding, for example, an upper fixing bracket for fixing the upper end portion of the brace has a configuration shown in FIG. That is, the upper fixing bracket is composed of a dedicated latch 31 and a wing plate bolt 32. The hang bracket 31 is hooked on the suspension bolt 2, and one end of the wing plate bolt 32 is screwed to the latch 31. Then, the upper end of the brace 4 is fixed to the suspension bolt 2 by screwing the other end of the battledore bolt 32 to the brace 4 with a tapping screw or the like.

  Here, in order to reliably suppress the shaking of the ceiling, the mounting angle of the brace 4 with respect to the frame 3 varies depending on the situation at the site. That is, as shown in FIG. 14, the frame 3 depends on the conditions such as the length H between the slab 1 and the frame 3 (that is, the ceiling pocket dimension) H and the distances L1, L2, L3 between the suspension bolts 2. The mounting angles θ1, θ2, and θ3 of the brace 4 with respect to are changed.

  For example, even if the ceiling pocket dimension H is the same, if the distance between the bolts is as short as L1, the bracing angle θ1 is large, and the longer the distance between the bolts is L2, L3, the larger the brace angle θ2 is. By making it gradually smaller with θ3, the shaking of the ceiling can be reliably suppressed.

  However, in the conventional configuration shown in FIG. 15, the latch 31 is formed in advance so that the inclination angle between the suspension bolt 2 and the brace via the latch 31 is always constant (for example, 45 °). Yes. Therefore, for example, when the distance between the bolts is as long as L3, even if it is originally intended to set the attachment angle of the brace 4 to θ3, the brace 4 is only at the inclination angle θ1 when the distance between the suspension bolts 2 is L1. Therefore, the lower end of the frame must be fixed to the frame 3. For this reason, it is difficult to reliably suppress the shaking of the ceiling, and it does not meet the seismic standards of the industry.

  As a countermeasure, for example, it is possible to change the mounting angle of the brace 4 to the frame 3 by changing the mounting angle of the battledore bolt 32 to the brace 4. When the mounting angle is changed and fixed, the axial direction of the wing plate bolt 32 and the extending direction of the brace 4 do not coincide with each other. Therefore, when stress due to an earthquake or the like is applied to the brace 4, the brace 4 is likely to buckle.

  Therefore, although not shown in the prior art, as an upper fixing bracket for fixing the upper end portion of the brace, a pin is provided between a clipper member that holds the suspension bolt by tightening the bolt and a coupling member that is fixed to the brace by screwing. For example, a structure in which the bracing frame is attached to the frame so that the mounting angle of the brace with respect to the frame can be arbitrarily adjusted has been proposed.

  However, in the case of a configuration in which the clipper member and the coupling member are swingably connected as the upper fixing bracket, there is an advantage that the angle of the brace can be adjusted, but in order to fix the clipper member to the suspension bolt Requires a work to fasten and fix the clipper member with a bolt. Therefore, a special scaffold for working at high places must be specially assembled and installed to attach the upper bracket, and it takes time and labor to hang up the dedicated scaffold. In addition to being bad, there are inconveniences such as it is difficult to ensure sufficient safety for working at high places.

  Further, in any conventional technique, when the brace is arranged in a direction orthogonal to the extending direction of the frame, conventionally, the contact area between the brace and the frame is small in fixing the lower end side of the brace to the frame. For this reason, it is difficult to securely screw between the two, and there are still problems such as being forced to rely on welding work.

  The present invention was made in order to solve the above problems, and can securely and efficiently fix the upper and lower ends of the brace to the suspension bolt and the frame, respectively, without requiring any welding work, And it aims at providing the brace fixing metal fitting which can freely set the attachment angle of a brace in the suitable range according to an earthquake-proof standard according to the condition of the field.

  In order to achieve the above-mentioned object, the diagonal reinforcement for connecting and reinforcing between the suspension bolt suspended by the slab provided on the ceiling side of the building and the frame for holding the ceiling plate material suspended by the suspension bolt is provided. In the present invention, the following configuration is adopted as the brace fixing bracket for fixing the brace.

  That is, the brace fixing bracket according to the present invention has an upper fixing bracket used for fixing the upper end portion of the brace on the suspension bolt side, and the upper fixing bracket holds the suspension bolt in the suspension bolt. A hook member that is hooked like this, a wing plate bolt having one end fixed to the brace, and a connecting member into which a bolt portion formed on the other end of the wing plate bolt is screwed and inserted, and the hook The member and the connecting member are configured to be swingably connected via a rivet.

In addition, the hook member has a substantially semicircular arc-shaped cross section that is latched so as to hold the suspension bolt, and a cross section that extends from the latch part has a substantially J-shaped fitting portion,
The connecting member has a substantially U-shaped cross section, rivet insertion holes are formed in a pair of opposing portions sandwiching the inner groove, and a bolt portion of a wing plate bolt is formed on a side surface orthogonal to both opposing portions. A screw hole is formed through which is inserted.

  Furthermore, when the brace is arranged in a direction perpendicular to the extending direction of the frame, the brace has a lower fixing bracket used for fixing a lower end portion of the brace on the frame side. It consists of a hanger member for suspending the frame on the suspension bolt and a mounting auxiliary member screwed to the hanger member. The side surface of the lower end of the brace is fixed to the mounting auxiliary member by surface contact. It is preferable to apply one in which at least two joining surface portions are formed.

  By using the brace fixing bracket of the present invention, each end of the brace can be reliably and efficiently fixed to the suspension bolt and the frame without requiring any welding work. Moreover, the brace mounting angle can be freely set within an appropriate range in accordance with the seismic standards of the industry according to the situation on the site. For this reason, workability at the time of on-site construction is improved, and sufficient safety can be ensured because work at high places is reduced.

  In addition, by applying the lower fixing bracket, the lower end of the brace can be reliably and easily fixed even when the brace is arranged in a direction orthogonal to the extending direction of the frame.

The brace was fixed using the brace fixing bracket of the present invention when the brace is arranged in parallel with the extending direction of the C channel, which is a channel steel having a substantially U-shaped cross section as a frame for holding the ceiling plate material. It is a front view which shows a state. It is a front view which expands and shows the part shown with the code | symbol A of FIG. It is a front view which expands and shows the part shown with the code | symbol B of FIG. It is a disassembled perspective view which shows the detail of the upper fixture which comprises a brace fixture. It is a perspective view which shows the state which fixed the upper end part of the brace to the suspension bolt using the upper fixing metal fitting of FIG. It is a front view which shows the state which fixed the brace using the brace fixing metal fitting of this invention when a brace is arrange | positioned orthogonally to the extending direction of C channel. It is a front view which expands and shows the part shown with the code | symbol C of FIG. It is a disassembled perspective view which shows the detail of the lower fixing metal fitting used in order to fix the lower end part of a brace to C channel. It is a perspective view which shows the state which fixed the lower end part of the brace to C channel using the lower fixing metal fitting shown in FIG. A state in which the brace is fixed using the brace fixing bracket of the present invention when the brace is arranged in parallel with the extending direction of the T bar which is a substantially T-shaped section as a frame for holding the ceiling plate material FIG. It is a disassembled perspective view which shows the detail of the lower fixing metal fitting used in order to fix the lower end part of a brace to T bar. It is a perspective view which shows the state which fixed the lower end part of the brace to T bar using the lower fixing metal fitting shown in FIG. It is a perspective view in the case of installing a ceiling board material on a T bar in the direct suspension method of the system ceiling. Front view showing a state in which a suspension bolt suspended from a slab provided on the ceiling side of the building and a frame for holding a ceiling plate suspended from the suspension bolt are connected and reinforced by braces for oblique reinforcement It is. It is a perspective view which shows an example of the conventional brace fixing metal fitting used in order to fix the upper end part of a brace to a suspension bolt.

  FIG. 1 is a front view showing a state in which a brace for diagonal reinforcement is fixed between a suspension bolt and a frame using a brace fixing bracket according to an embodiment of the present invention, and FIG. FIG. 3 is an enlarged front view showing a portion indicated by reference numeral B in FIG. 1. 4 is an exploded perspective view showing details of the upper fixing bracket constituting the brace fixing bracket, and FIG. 5 is a perspective view showing a state where the upper end of the brace is fixed to the suspension bolt using the upper fixing bracket of FIG. It is.

  In these drawings, reference numeral 1 is a slab provided on the ceiling side of the building, 2 is a suspension bolt suspended from the slab 1, and 3c is a frame for holding a ceiling plate material suspended from the suspension bolt 2 via a hanger member 22. In particular, here, the C channel, which is a channel steel having a substantially U-shaped cross section, is applied. Reference numeral 4 denotes an oblique reinforcing brace for connecting and reinforcing the suspension bolt 2 and the C channel 3c. And the brace fixing metal fitting of this embodiment is used in order to fix the brace 4. FIG. Reference numeral 5 denotes a ceiling plate material placed on the C channel 3c.

  The brace fixing bracket of this embodiment includes an upper fixing bracket 11 used for fixing the upper end portion of the brace 4 on the suspension bolt 2 side. The upper fixing bracket 11 is as shown in FIGS. 4 and 5. Further, it includes a hook member 12, a battledore bolt 13, and a connecting member 14.

  The hook member 12 has a latching portion 12a having a substantially semicircular cross section that is hooked to the suspension bolt 2 so as to hold the suspension bolt 2, and a cross section extending from the latching portion 12a having a substantially J-shape. The fitting portion 12b is integrally formed. And the internal diameter of the latching | locking part 12a is formed in the dimension which substantially corresponds to the outer diameter of the suspension bolt 2. FIG. An insertion hole 12c for a flat rivet 15 is formed in a pair of left and right opposing portions sandwiching the inner groove of the fitting portion 12b.

  The battledore bolt 13 includes a flat plate portion 13a whose one end is fixed to the brace 4 and a bolt portion 13b protruding from the flat plate portion 13a.

  The connecting member 14 has a substantially U-shaped cross section, and a pair of left and right opposing portions 14a sandwiching the inner groove are formed with insertion holes 14b for flat rivets 15, and are orthogonal to both opposing portions 14a. The side surface portion 14c is formed with a screw hole 14d into which the bolt portion 13b of the battledore bolt 13 is screwed. Further, the lower ends of both facing portions 14a of the connecting member 14 are cut off obliquely, and a protruding portion 14e for locking to the suspension bolt 2 is formed at the lower end of the side surface portion 14c.

  And the flat rivet 15 as each connection pin is inserted so that it may penetrate each insertion hole 12c, 14b in the state which the fitting part 12b of said hook member 12 was fitted by the inner groove of the connection member 14. At the same time, the washer 16 and the snap pin 17 are attached to the flat rivet 15, whereby the hook member 12 and the connecting member 14 are swingably connected via the flat rivet 15.

  In the above configuration, as shown in FIG. 1, when the brace 4 is arranged in parallel with the extending direction of the C channel 3 c, the upper fixing bracket 11 is applied to the suspension bolt 2 at the upper end of the brace 4. Fix it. In addition, since a sufficient contact area with the C channel 3c can be secured at the lower end of the brace 4, the tapping screw 18 is applied to fix the brace 4 to the C channel 3c.

  In order to fix the upper end of the brace 4 to the suspension bolt 2 by applying the upper fixing bracket 11, the following procedure is used.

  A brace 4 having an appropriate length is prepared in advance in consideration of conditions such as the ceiling pocket size H and the interval L between the suspension bolts 2. Then, the fitting portion 12b of the hook member 12 is fitted into the inner groove of the connecting member 14, and the flat rivet 15 is inserted so as to pass through the insertion holes 12c and 14b. The washer 16 and the snap pin are inserted into the flat rivet 15. 17 is applied so that the hook member 12 and the connecting member 14 are swingably connected via a flat rivet 15. Next, the bolt portion 13 b of the battledore bolt 13 is screwed into the screw hole 14 d of the connecting member 14, and the flat plate portion 13 a of the battledore bolt 13 is fixed to the upper end side of the brace 4 with a tapping screw 18. At that time, the flat plate portion 13 a of the battledore bolt 13 is attached so as to be approximately at the center in the width direction of the brace 4 and parallel to the longitudinal direction of the brace 4. In this state, the hooking portion 12 a of the hook member 12 is hooked on the suspension bolt 2.

  Then, the brace 4 is held while the hooking portion 12a of the hook member 12 is hooked on the suspension bolt 2, and the upper fixing bracket 11 is separated from the lower end of the slab 1 by about D = 75 mm. Slide along the suspension bolt 2 until it reaches the desired position).

  When the upper end of the brace 4 and the upper fixing bracket 11 reach a predetermined position along the suspension bolt 2, the lower end of the brace 4 is fixed to the C channel 3c by applying a tapping screw 18. At that time, the hook member 12 and the connecting member 14 are swingably connected by rotating the brace 4 and changing the protruding amount of the bolt member 13b of the battledore bolt 13 from the screw hole 14d of the connecting member 14. Combined with this, fine adjustment of the attachment angle θ of the brace 4 to the C channel 3c can be easily performed.

  In this way, by using the upper fixing bracket 11, the brace 4 can be reliably and easily attached according to the situation at the site by freely setting the attachment angle θ within an appropriate range in accordance with the seismic standards of the industry. it can. Moreover, when the upper end of the brace 4 is fixed to the suspension bolt 2, there is no need to assemble and install any special scaffold for working at high places for mounting brackets as in the past. There is no need for labor and work such as climbing up and down the scaffolding of workers, and workability and safety are improved.

  The above description is a case where the brace 4 is arranged and fixed in parallel with the extending direction of the C channel 3c. Next, the case where the brace 4 is arranged and fixed in a direction orthogonal to the extending direction of the C channel 3c. explain.

  In this case, the upper end portion of the brace 4 can be fixed to the suspension bolt 2 using the upper fixing bracket 11 in the same manner as described above. On the other hand, when the lower end portion of the brace 4 is fixed, a sufficient contact area with the C channel 3c cannot be secured in the state as it is, so the lower fixing bracket 21 as shown in FIGS. 6 to 9 is applied.

  That is, the lower fixing bracket 21 includes a hanger member 22 for suspending the C channel 3 c on the suspension bolt 2 and an attachment auxiliary member 23 screwed to the hanger member 22.

  In this case, the hanger member 22 is an existing one and is entirely composed of an arm portion 22a bolted to the suspension bolt 2 and a holding portion 22b extending from the arm portion 22a and holding the C channel 3c. It is formed in a substantially J shape. Further, the attachment auxiliary member 23 has a substantially U-shaped cross section, and a pair of left and right opposing portions sandwiching the inner groove are fixed to each other by fixing the side surfaces of the lower end of the brace 4 in surface contact. It is formed as a surface portion 23a.

  And the side part 23b orthogonal to both the joint surface parts 23a of the attachment auxiliary member 23 is fixed to the arm part 22a of the hanger member 22 with the tapping screw 18, and the lower end part side surface of the brace 4 to each joint surface part 23a of the attachment auxiliary member 23. Is fixed with a tapping screw 18. Therefore, when the brace 4 is arranged and fixed in the direction orthogonal to the extending direction of the C channel 3c, the lower end portion of the brace 4 can be reliably secured by using the attachment auxiliary member 23 and the existing hanger member 22 in combination. Can be fixed.

  The example shown in FIGS. 1 to 9 is a case where the C channel 3c is used as a frame for holding the ceiling plate material. However, in the direct suspension method of the system ceiling, the frame for holding the ceiling plate material has a substantially T-shaped cross section. (Hereinafter referred to as T-bar 3t).

  When such a T-bar 3t is used as a frame, when the brace 4 is arranged and fixed in parallel with the extending direction of the T-bar 3t as shown in FIG. 10, the upper end of the brace 4 is fixed as shown in FIG. And the upper fixing metal fitting 11 as shown in FIG. 5 is applied as it is. In addition, fixing the lower end of the brace 4 can secure a sufficient contact area with the T-bar 3t, so the t-bar 3t is directly screwed to the T-bar 3t.

  On the other hand, when the brace 4 is arranged and fixed in a direction orthogonal to the extending direction of the frame, the upper fixing bracket 11 as shown in FIGS. 4 and 5 is similarly applied to the upper end of the brace 4 and fixed. However, since the lower end portion of the brace 4 cannot secure a sufficient contact area with the T bar 3t in the state as it is, the lower fixing fitting 21 as shown in FIGS. 11 and 12 is applied.

  That is, the lower fixing bracket 21 includes a hanger member 24 for suspending the T bar 3t on the suspension bolt 2 and a mounting auxiliary member 23 screwed to the hanger member 24.

  In this case, the hanger member 24 is an existing one, and includes an arm portion 24a that is bolted to the suspension bolt 2 and a grip portion 24b that extends from the arm portion 24a and grips the upper portion of the T bar 3t. Become. Further, as the mounting auxiliary member 23, one having the same shape as the mounting auxiliary member 23 shown in FIGS. 6 to 9 is used.

  In this case as well, the side surface portion 23 b orthogonal to both the joint surface portions 23 a of the attachment auxiliary member 23 is fixed to the arm portion 24 a of the hanger member 24 with the tapping screw 18, and the brace 4 is attached to each joint surface portion 23 a of the attachment auxiliary member 23. The side surface of the lower end portion of the head is fixed with a tapping screw 18. Therefore, even when the brace 4 is arranged and fixed in a direction orthogonal to the extending direction of the T-bar 3t, the lower end portion of the brace 4 can be used by combining the attachment auxiliary member 23 and the existing hanger member 24. It can be fixed securely.

  In the above-described embodiment, the mounting auxiliary member 23 used as the lower fixing bracket 21 is configured to have two joint surface portions 23a by forming a U-shaped cross section. It is also possible to use a shape such as a pentahedron having five bonding surface portions 23a.

  In the system ceiling direct suspending method, the T bar 3t is used as a frame for holding the ceiling plate material as described above. As shown in FIG. 13, the T bar 3t is vertically and horizontally arranged in a rectangular frame. A lightweight and sound-absorbing ceiling board material 5 made of a cotton sound-absorbing board or the like is disposed.

  In this case, conventionally, the ceiling plate material 5 is simply dropped and held in the rectangular frame made of the T-bar 3t, so that the ceiling plate material 5 is lifted by wind pressure such as earthquake vibration or typhoon. May fall to the ground.

  Therefore, in order to prevent such a ceiling plate material 5 from being lifted, it is preferable to use a lifting prevention metal fitting 25 as shown in FIG. That is, the entire lifting prevention metal fitting 25 is formed in a substantially square shape, and a slit 25a is formed at the center of the left and right inclined surfaces, and the slit 25a is inserted into the upper portion of the T bar 3t.

  If such a lifting prevention metal fitting 25 is used, even if the ceiling board material 5 is lifted by wind pressure such as earthquake vibration or typhoon, the ceiling board material 5 is dropped to the original position by hitting the metal fitting 25, so that the ceiling board material 5 is surely dropped. In addition to being able to prevent, the metal fittings can be easily attached and detached, and the structure is simple, so there is an advantage that the fall prevention work is easy and can be carried out at low cost.

1 slab, 2 suspension bolts, 3 frames, 3c C channel, 3t T-bar,
4 braces, 5 ceiling plate materials, 11 upper fixing brackets, 12 hook members,
13 wing plate bolt, 13b bolt part, 14 connecting member, 14d screw hole,
14e Protruding part, 15 flat rivet (connecting pin), 21 lower fixing bracket,
22, 24 Hanger member, 23 Attachment auxiliary member.

Claims (3)

It is intended to fix the bracing for diagonal reinforcement that reinforces the connection between the suspension bolt suspended on the slab provided on the ceiling of the building and the frame for holding the ceiling plate suspended from the suspension bolt. And
An upper fixing bracket used for fixing the upper end portion of the brace on the suspension bolt side, the upper fixing bracket includes a hook member that is hooked to hold the suspension bolt on the suspension bolt, and A brace plate bolt, one end of which is fixed to the brace, and a connecting member into which a bolt portion formed on the other end of the brace plate bolt is screwed, and the hook member and the connecting member are connected via a rivet. A brace fixing bracket characterized by being connected in a swingable manner. The hook member has a latching part having a substantially semicircular cross section that is latched so as to hold the suspension bolt, and a fitting part having a substantially J-shaped cross section extending from the latching part,
The connecting member has a substantially U-shaped cross section, and a pair of opposed portions sandwiching the inner groove are formed with insertion holes for the rivets, and the side plate perpendicular to the opposed portions has the wing plate bolt The brace fixing metal fitting according to claim 1, wherein a screw hole is formed through which the bolt portion is inserted. When the brace is arranged in a direction perpendicular to the extending direction of the frame, the brace has a lower fixing bracket used for fixing a lower end portion on the frame side of the brace. It comprises a hanger member for hanging on the suspension bolt and a mounting auxiliary member screwed to the hanger member, and the side surface of the lower end of the brace is fixed to the mounting auxiliary member by surface contact. The brace fixing bracket according to claim 1 or 2, wherein at least two joining surface portions are formed.

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