JP2020176639A - Brace connecting metal fitting - Google Patents

Abstract

To improve work efficiency in connecting a brace bolt to a suspension bolt, and to exert a runout prevention effect of the suspension bolt with strength higher than before.SOLUTION: A brace connecting metal fitting 1 has a holding part 2 for holding a suspension bolt, a pair of attachment parts 3, 4 extending from the holding part 2 at substantially-right angles, and a pair of fixed members 5, 6 attached to the pair of attachment parts 3, 4, respectively. The pair of fixed member 5, 6 are attached to the attachment parts 3, 4 with bolt members 7, 8 in positioned states, and a brace bolt can be inserted between the attachment parts 3, 4 at an arbitrary angle within a prescribed angle range when the bolt members 5, 6 are in temporarily-fastened states. By fastening the bolt members 7, 8, the brace bolt is sandwiched and fixed between the attachment parts 3, 4 in a state that an insertion angle of the brace bolt is held.SELECTED DRAWING: Figure 1

Description

The present invention relates to a brace connecting metal fitting for connecting a brace bolt serving as an oblique reinforcing material to a hanging bolt.

Conventionally, in a structure in which a hanging bolt hanging from a ceiling structure such as a ceiling slab supports a ceiling hanging object such as an air conditioner, a brace bolt serving as an oblique reinforcing material is connected to a position near the upper end and a position near the lower end of the hanging bolt. The vibration at the time of an earthquake is suppressed. As a brace connecting metal fitting of this kind, for example, a conventional product disclosed in Patent Document 1 is known.

This conventional product has a substantially L-shaped fixing bracket and a pair of brace support brackets that are attached to both ends of the fixing bracket via connecting bolts. The brace support bracket includes a first member provided with a U-shaped engaging portion that engages with the outer peripheral surface of the brace bolt, and a flat plate-shaped second member arranged to face the first member. A connecting bolt is attached to one end side of the first member and the second member, and a fastening bolt is attached to the other end side. In this brace support metal fitting, the first member and the second member can be rotationally displaced relative to the fixing metal fitting with the connecting bolt as the rotation axis, and the posture should be adjusted according to the arrangement angle of the brace bolt. Can be done. Then, with both the connecting bolt and the tightening bolt temporarily fixed, the brace bolt is inserted between the first member and the second member, and then the connecting bolt and the tightening bolt are tightened via the brace connecting metal fitting. The brace bolt can be connected to the hanging bolt.

JP-A-2017-57704

However, in the above-mentioned conventional product, in the temporarily fixed state, the brace support bracket composed of the first member and the second member rotates around the connecting bolt, so that the operator can position the position near the lower end of the brace bolt at a relatively low position. If an attempt is made to insert the upper end portion of the brace bolt between the first member and the second member while holding the brace bolt, the posture of the brace support metal fitting changes, and it is difficult to insert the upper end portion of the brace bolt. Therefore, the operator climbs to a high position where the brace connecting bracket is attached, widens the distance between the first member and the second member with one hand, and holds the upper end portion of the brace bolt with the other hand. It is necessary to insert the brace bolt between the first member and the second member, and there is a problem that the work efficiency when temporarily fixing the brace bolt is lowered.

In addition, since the brace support bracket can be rotationally displaced around the connecting bolt in the above-mentioned conventional product, even if the connecting bolt is tightened tightly, an excessive load is applied to the brace support bracket when a large-scale earthquake occurs. When acted, the brace support bracket may rotate around the connecting bolt. Further, even when a small-scale earthquake occurs repeatedly, the connecting bolt may be loosened and the brace support metal fitting may be easily rotationally displaced. If the brace support bracket rotates around the connecting bolt in the event of an earthquake, the strength of the diagonal reinforcement will decrease, and the displacement of the suspension bolt will increase, effectively exerting the steady rest effect of the suspension bolt. There is a problem that it cannot be done.

Further, it is generally known that a sufficient strength as an oblique reinforcing material can be secured by keeping the arrangement angle of the brace bolt within the angle range of 45 ° ± 15 °. However, in the above-mentioned conventional product, since the brace support metal fitting can rotate 360 ° around the connecting bolt, the arrangement angle of the brace bolt cannot be regulated. Therefore, there is a possibility that the operator mistakenly arranges the brace bolt at an angle outside the above angle range and connects it to the brace support metal fitting. When such a situation occurs, the brace bolt connection work must be redone, which causes a decrease in work efficiency.

Further, when performing construction using the above-mentioned conventional product, it may be necessary to draw a drawing of the installation mode of the brace connecting metal fitting in advance and submit it to the contractor. In such a case, when the brace support metal fitting is angularly displaced as in the conventional product, the drawing must be created while adjusting the angle of the brace support metal fitting with respect to the fixing metal fitting according to the arrangement angle of the brace bolt. There is also a problem that work efficiency at the time of drawing creation is poor.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and the tip of the brace bolt can be easily inserted while the operator is in a relatively low position, and is stronger than the conventional one. To provide a brace connecting metal fitting that exerts a steady rest effect of a hanging bolt with strength and can prevent an operator from accidentally arranging a brace bolt at an angle outside a predetermined angle range. Is the main purpose. Further, according to the present invention, even if it is necessary to draw and submit the installation mode of the brace connecting metal fitting to the contractor, the work efficiency at the time of drawing can be improved as compared with the conventional case. The additional purpose is to provide metal fittings.

In order to achieve the above object, first, the present invention is a brace connecting metal fitting (1), which is substantially perpendicular to each other from a holding portion (2) for holding a hanging bolt (110) and the holding portion (2). It has a pair of mounting portions (3,4) extending at an angle forming the above, and a pair of fixing members (5,6) attached to each of the pair of mounting portions (3,4). Each of the pair of fixing members (5,6) is attached in a state of being positioned with respect to the attachment portion (3,4) by the bolt member (7,8), and the bolt member (7,8) is temporarily attached. The brace bolt (120) can be inserted between the mounting portion (3, 4) and the mounting portion (3, 4) at any angle within a predetermined angle range in the stopped state, and the bolt member (7, 8) is tightened. The brace bolt (120) is sandwiched and fixed between the brace bolt (120) and the mounting portion (3, 4) while maintaining the insertion angle of the brace bolt (120).

Secondly, according to the present invention, in the brace connecting metal fitting (1) having the first configuration, the fixing member (5, 6) is the first bolt member (7) and the second bolt member (8). The configuration is characterized in that it can be mounted in a state of being positioned with respect to the mounting portions (3, 4).

Thirdly, according to the present invention, in the brace connecting metal fitting (1) having the second configuration, the fixing members (5, 6) are the first bolt member (7) and the second bolt member (7). The structure is characterized in that the brace bolt (120) inserted between 8) is sandwiched and fixed between the brace bolt (120) and the mounting portion (3, 4).

Fourth, in the present invention, in the brace connecting metal fitting (1) having the second or third configuration, the fixing member (5, 6) can insert the first bolt member (7). A flat plate portion (20) having a hole (20a) of 1 and a second hole (20b) through which the second bolt member (8) can be inserted, and a hook provided at both ends of the flat plate portion (20). The locking portion (21,22) has a stop portion (21,22), and the first and second bolt members (7,8) are tightened so that the locking portion (21,22) is the outer circumference of the brace bolt (120). The configuration is characterized in that it is fixed in a state of being locked to a surface.

Fifth, in the present invention, in the brace connecting metal fitting (1) having the fourth configuration, the insertion angle (θ) of the brace bolt (120) is set to the locking portion (21,22). The configuration is characterized in that a regulation unit (23, 24) is provided to regulate within the angle range.

Sixth, in the brace connecting metal fitting (1) having the fourth or fifth configuration, the present invention attaches the brace bolt (120) to the locking portion (21, 22) within the predetermined angle range. The configuration is characterized in that a recess (26) through which the sword is inserted is provided.

Seventh, the present invention is characterized in that, in the brace connecting metal fitting (1) having the sixth configuration, the recessed amount (H) of the recess (26) is smaller than the diameter of the brace bolt (120). It is a configuration.

The reference numerals shown in parentheses above are merely examples, and the above reference numerals do not limit the present invention.

According to the brace connecting metal fitting of the present invention, the tip of the brace bolt can be easily inserted while the operator is in a relatively low position, and the anti-sway effect of the hanging bolt is effectively exhibited with a stronger strength than before. Further, it becomes possible to prevent the operator from accidentally disposing the brace bolt at an angle outside the predetermined angle range. Further, even if it is necessary to draw and submit the installation mode of the brace connecting metal fitting to the contractor, the brace connecting metal fitting of the present invention is a member whose posture changes according to the arrangement angle of the brace bolt. Since there is no such thing, the work efficiency at the time of drawing creation can be dramatically improved as compared with the conventional case.

It is a perspective view which shows the brace connecting metal fittings. It is a perspective view which looked at the state which disassembled each component of a brace connecting metal fitting from the front side. It is a perspective view which looked at the state which disassembled each component of a brace connecting metal fitting from the back side. It is a side view which shows the installation mode of the brace connecting metal fittings. It is a figure which shows one structural example of a fixing member. It is a figure which shows the example of the construction procedure at the time of attaching a brace connecting metal fitting to a hanging bolt. It is a figure which shows the example of mounting a brace bolt between a mounting portion and a fixing member. It is a figure which shows the example which inserts the tip of a brace bolt between a mounting part and a fixing member. It is a figure which shows the structure when the strength test of the brace connecting metal fitting was performed. It is a figure which shows the result of the strength test. It is a figure which shows the 1st modification of a brace connecting metal fitting. It is a figure which shows the 2nd modification of a brace connecting metal fitting. It is a figure which shows the 3rd modification of a brace connecting metal fitting. It is a figure which shows the 4th modification of a brace connecting metal fitting.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings referred to below, members that are common to each other are designated by the same reference numerals, and duplicate description thereof will be omitted.

1A and 1B are perspective views showing a brace connecting fitting 1 according to an embodiment of the present invention. FIG. 1A is a view of the brace connecting fitting 1 viewed from the front side, and FIG. 1B is a back view of the brace connecting fitting 1. The figure seen from the side is shown. FIG. 2 is a perspective view of the disassembled state of each component of the brace connecting metal fitting 1 as viewed from the front side. FIG. 3 is a perspective view of the disassembled state of each component of the brace connecting metal fitting 1 as viewed from the rear side. Further, FIG. 4 is a side view showing an installation mode of the brace connecting metal fitting 1.

First, as shown in FIG. 4, the brace connecting metal fitting 1 of the present embodiment is a brace bolt 120 disposed obliquely between a hanging bolt 110 hanging from a ceiling structure 100 such as a ceiling slab and a pair of hanging bolts 110. It is a metal fitting for connecting with.

The hanging bolt 110 is a bolt that supports a ceiling hanging object 150 such as an air conditioner in a suspended state in the ceiling space. For example, four hanging bolts 110 are attached to the ceiling structure 100 so that they can be connected to connecting portions 151 provided at the four corners of the ceiling hanging object 150. The four suspension bolts 110 are connected to the connecting portions 151 at the four corners of the ceiling suspension object 150 at the lower end portions thereof, and support the ceiling suspension object 150 at a predetermined height position.

The brace bolt 120 is arranged diagonally between two suspension bolts 110 adjacent to each other among the four suspension bolts 110, and the upper end is connected to a position near the upper end of one suspension bolt 110, and the lower end is connected. The portion is connected to a position near the lower end of the other suspension bolt 110. The arrangement angle of the brace bolt 120 is appropriately adjusted according to the dimension from the ceiling structure 100 to the upper surface of the ceiling suspension object 150. For example, assuming that the horizontal line is 0 ° as a reference, if the dimension from the ceiling structure 100 to the upper surface of the ceiling suspension 150 becomes long, the arrangement angle of the brace bolt 120 becomes large, and conversely, from the ceiling structure 100 to the ceiling. The shorter the dimension to the upper surface of the suspended object 150, the smaller the arrangement angle of the brace bolt 120. The brace connecting metal fitting 1 has a structure capable of connecting the brace bolts 120 arranged at such various angles to the suspension bolts 110.

Between the two suspension bolts 110, the two brace bolts 120 are arranged so as to intersect each other. Therefore, the brace connecting metal fittings 1 are attached to the upper part and the lower part of one hanging bolt 110 at different height positions, and the brace bolt 120 is connected to the hanging bolt 110 at each height position. In FIG. 4, the brace connecting fitting 1 attached to the lower part of the hanging bolt 110 is shown as the brace connecting fitting 1a, and the brace connecting fitting 1 attached to the upper part of the hanging bolt 110 is shown as the brace connecting fitting 1b. The brace connecting metal fitting 1a and the brace connecting metal fitting 1b have the same configuration and function except that they are used in a state where they are turned upside down.

Next, the brace connecting metal fitting 1 will be described. As shown in FIGS. 1, 2 and 3, the brace connecting bracket 1 includes a holding portion 2 for holding the suspension bolt 110 and a pair of mounting portions 3 extending from the holding portion 2 at an angle substantially perpendicular to each other. , 4 and a pair of fixing members 5, 6 attached to each of the pair of attachment portions 3, 4. For example, the fixing member 5 is mounted in a state of being positioned with respect to one mounting portion 3 by the first bolt member 7 and the second bolt member 8 (a state in which the fixing member 5 is not angularly displaced with respect to the mounting portion 3). Similarly, the fixing member 6 is also mounted in a state of being positioned with respect to the other mounting portion 4 by the first bolt member 7 and the second bolt member 8 (a state of not being angularly displaced with respect to the mounting portion 3). Be done. These fixing members 5 and 6 are members for fixing the brace bolt 120 to the mounting portions 3 and 4.

The holding portion 2 is formed by bending a substantially rectangular vertical plate portion 10 arranged in parallel with the suspension bolt 110 and the upper portion of the vertical plate portion 10 by 90 °, and the suspension bolt 110 (the back side of the brace connecting bracket 1). The first holding plate portion 11 extending horizontally toward) and the lower portion of the vertical plate portion 10 are bent 90 ° in the same direction as the first holding plate portion 11 to form a hanging bolt 110 (brace connection). It has a second holding plate portion 12 extending in the horizontal direction toward the back surface side of the metal fitting 1.

A screw hole 15 in which a female screw to be screwed with the male screw of the bolt 16 is formed is provided at substantially the center of the vertical plate portion 10. A bolt 16 can be attached to the screw hole 15 from the front side of the brace connecting metal fitting 1. The vertical plate portion 10 holds the bolt 16 in a state of being screwed into the screw hole 15, and when the bolt 16 is tightened, the tip of the bolt 16 is screwed forward toward the back surface side of the brace connecting metal fitting 1. be able to.

The first holding plate portion 11 has an insertion portion 13 into which the suspension bolt 110 can be inserted at substantially the center. A communication portion 14 is provided in the insertion portion 13, and the insertion portion 13 is opened to the side of the first holding plate portion 11 via the communication portion 14. The insertion portion 13 is formed with a semicircular engaging portion formed so as to engage with the outer peripheral surface of the suspension bolt 110 in the traveling direction of the bolt 16. This engaging portion is located on the axis of the bolt 16.

The second holding plate portion 12 has the same configuration as the first holding plate portion 11. That is, the second holding plate portion 12 has an insertion portion 13 into which the suspension bolt 110 can be inserted at substantially the center. A communication portion 14 is also provided in the insertion portion 13, and the insertion portion 13 is opened to the side of the second holding plate portion 12 via the communication portion 14. The position where the communication portion 14 is provided in the second holding plate portion 12 is the same as the position where the communication portion 14 is provided in the first holding plate portion 11. The insertion portion 13 of the second holding plate portion 12 is also formed with a semicircular engaging portion formed so as to engage with the outer peripheral surface of the suspension bolt 110 on the axis of the bolt 16.

The pair of mounting portions 3 and 4 are extended from the left and right sides of the vertical plate portion 10 constituting the holding portion 2 at an angle substantially perpendicular to each other on the back surface side of the brace connecting metal fitting 1. Each of these mounting portions 3 and 4 is formed as a metal plate arranged in parallel with the suspension bolt 110. The mounting portion 3 is provided with two screw holes 3a and 3b capable of screwing the first bolt member 7 and the second bolt member 8. The line connecting the centers of these two screw holes 3a and 3b is in a state of being inclined by a predetermined angle with respect to the vertical direction. Further, the mounting portion 4 is also provided with two screw holes 4a and 4b capable of screwing the first bolt member 7 and the second bolt member 8. The line connecting the centers of these two screw holes 3a and 3b is also in a state of being inclined by a predetermined angle with respect to the vertical direction. Here, the distance from the vertical plate portion 10 to the screw hole 3a and the distance from the vertical plate portion 10 to the screw hole 4a are equal to each other, and the distance from the vertical plate portion 10 to the screw hole 3b and the distance from the vertical plate portion 10 to the screw hole. The distances to 4b are formed to be equal to each other. Further, the distance between the screw holes 3a and 3b is larger than the diameter of the brace bolt 120, and the first bolt member 7 and the second bolt are in a state where the first bolt member 7 and the second bolt member 8 are screwed together. The brace bolts 120 inserted between the members 8 are formed at intervals that can be swung at least within a predetermined angle range. The spacing between the screw holes 4a and 4b is also the same.

Next, the fixing members 5 and 6 will be described in detail. The fixing members 5 and 6 are fixed with the brace bolt 120 sandwiched between the mounting portions 3 and 4. 5A and 5B are views showing one configuration example of the fixing members 5 and 6, where FIG. 5A shows a perspective view of the fixing members 5 and 6, and FIG. 5B shows a sectional view. As shown in FIG. 5A, the fixing members 5 and 6 have a rectangular flat plate portion 20 and locking portions 21 and 22 erected from both ends in the short side direction of the flat plate portion 20.

The flat plate portion 20 has a first hole 20a through which the first bolt member 7 can be inserted and a second hole 20b through which the second bolt member 8 can be inserted along the longitudinal direction thereof. .. The distance between the two holes 20a and 20b is the same as the distance between the two screw holes 3a and 3b (or 4a and 4b) formed in the mounting portions 3 and 4. The fixing members 5 and 6 are configured to sandwich the brace bolt 120 between the flat plate portion 20 and the mounting portions 3 and 4.

The locking portions 21 and 22 are for fixing the brace bolt 120 in a state of being locked to the outer peripheral surface of the brace bolt 120 while being pressed against the mounting portions 3 and 4. For example, the locking portions 21 and 22 are formed as side wall portions of the fixing members 5 and 6, and recesses 26 for inserting the brace bolts 120 are provided in the center in the longitudinal direction thereof, and the brace bolts 120 are provided on both sides of the recesses 26. Regulation units 23 and 24 are provided to regulate the insertion angle of the above within a predetermined angle range. In other words, the locking portions 21 and 22 have an open window 25 into which the brace bolt 120 can be inserted in the center thereof, and the brace bolt 120 is inserted into the first bolt member 7 and the second bolt member 7 through the open window 25. It can be inserted between the bolt members 8 of the above. Further, as shown in FIG. 5B, the recessed amount H of the recess 26 constituting the open window 25 is formed to be smaller than the diameter of the brace bolt 120.

As shown in FIGS. 1 to 3, the fixing members 5 and 6 configured as described above have the first bolt member 7 and the second bolt member 8 attached to the pair of mounting portions 3 and 4, respectively. Attached using. As described above, the screw holes 3a, 3b and 4a, 4b for mounting the first and second bolt members 7, 8 are all inclined at a predetermined angle with respect to the vertical direction, so that the fixing members 5, 6 is mounted in a state of being inclined by a predetermined angle with respect to the pair of mounting portions 3 and 4. Further, the locking portions 21 and 22 standing upright from the flat plate portion 20 are mounted so as to face the mounting portions 3 and 4. Therefore, the open windows 25 provided in the locking portions 21 and 22 of the fixing members 5 and 6 form an insertion space through which the brace bolt 120 can be inserted between the attachment portions 3 and 4, and the insertion space is obliquely oriented. It will be in an open state.

The brace connecting bracket 1 configured as described above is suspended because the first holding plate portion 11 and the second holding plate portion 12 of the holding portion 2 are each provided with a communication portion 14 communicating with the insertion portion 13. Even when the upper end portion of the bolt 110 is connected to the ceiling structure 100 and the ceiling suspension object 150 is already attached to the lower end portion, the bolt 110 can be retrofitted to the suspension bolt 110. FIG. 6 is a diagram showing a construction procedure when attaching the brace connecting metal fitting 1 to the suspension bolt 110. As shown by the arrow F1 in FIG. 6A, the operator introduces the suspension bolt 110 into the insertion portion 13 via the communication portion 14. At this time, since it is not necessary to insert the tip of the hanging bolt 110 into the insertion portion 13, the upper end of the hanging bolt 110 may be connected to the ceiling structure 100, or the ceiling hanging object may be connected to the lower end of the hanging bolt 110. 150 may be attached. Therefore, the operator can easily install the brace connecting metal fitting 1 in the state shown in FIG. 6B in the post-construction. After that, as shown in FIG. 6C, the operator presses the male screw of the suspension bolt 110 with the tip of the bolt 16 by tightening the bolt 16, and the suspension bolt 110 is attached to the engaging portion of the insertion portion 13. Fix it in a pressed state. As a result, the holding portion 2 is fixed in a state of holding the hanging bolt 110, and the brace connecting metal fitting 1 is attached at a predetermined height position of the hanging bolt 110.

When the brace connecting bracket 1 is attached to the suspension bolt 110, the operator attaches the brace bolt 120 between the pair of attachment portions 3 and 4 and the fixing members 5 and 6. FIG. 7 is a diagram showing an example in which the brace bolt 120 is mounted between the mounting portion 4 and the fixing member 6. By temporarily fixing the first and second bolt members 7 and 8 for attaching the fixing member 6 to the mounting portion 4, the fixing member 6 is separated from the mounting portion 4 and an insertion space for inserting the brace bolt 120 is provided. Can be expanded. Therefore, the operator inserts the tip of the brace bolt 120 into the insertion space between the mounting portion 4 and the fixing member 6 as shown in FIG. 7A in a state where the insertion space is expanded. At this time, the operator inserts the tip of the brace bolt 120 between the two bolt members 7 and 8.

As described above, the two bolt members 7 and 8 are provided at intervals that allow the brace bolt 120 to swing at least within a predetermined angle range, and the regulating portions 23 and 24 of the fixing member 6 are also provided with the brace bolt 120. The insertion angle of is regulated within a predetermined angle range. Therefore, when the tip of the brace bolt 120 is inserted between the mounting portion 4 and the fixing member 6, the operator can adjust the angle of the brace bolt 120 within a predetermined angle range. FIG. 7B is a cross-sectional view showing a state in which the flat plate portion 20 of the fixing member 6 is removed. For example, when the horizontal line L1 is set as a reference of 0 °, the fixing member 6 is regulated so that the mounting angle θ of the brace bolt 120 is within the range of 45 ° ± 15 °, and any range is within that range. The brace bolt 120 can be inserted at an angle. Therefore, when connecting the brace bolt 120 to the brace connecting metal fitting 1, the operator does not accidentally arrange the brace bolt 120 at an angle outside the predetermined angle range. That is, the brace connecting metal fitting 1 has a fail-safe function regarding the mounting angle θ of the brace bolt 120. Note that FIG. 7 shows an example in which the brace bolt 120 is mounted between the mounting portion 4 and the fixing member 6, but the same applies when the brace bolt 120 is mounted between the mounting portion 3 and the fixing member 5. is there.

Further, as shown in FIG. 7A, the fixing members 5 and 6 are mounted on the mounting portions 3 and 4 in a state of being inclined by a predetermined angle α with respect to the vertical direction Z. By inclining the fixing members 5 and 6 by a predetermined angle α in this way, there is an advantage that the brace connecting metal fitting 1 can be miniaturized according to the angle α. For example, as the angle α approaches 0 °, it is necessary to increase the size of the fixing members 5 and 6, the vertical dimensions of the mounting portions 3 and 4 increase, and the weight of the brace connecting metal fitting 1 increases. It becomes difficult to handle. Further, when the angle α approaches 90 °, it is also necessary to increase the size of the fixing members 5 and 6, and the horizontal dimensions of the mounting portions 3 and 4 are also increased, so that it is difficult to handle as described above. Become. Therefore, in the present embodiment, the angle α is set to about 38 °, and both the fixing members 5 and 6 and the mounting portions 3 and 4 are miniaturized. However, the angle α is not limited to about 38 °. For example, if the angle α is set within the range of 30 ° to 60 °, it is possible to realize miniaturization and weight reduction to the extent that the ease of handling of the brace connecting metal fitting 1 is not hindered.

Further, in the brace connecting metal fitting 1 of the present embodiment, the fixing member 6 is positioned on the mounting portion 4 by the two bolt members 7 and 8, and the fixing member 6 is not angularly displaced. Therefore, the operator can attach the upper end portion of the brace bolt 120 to the upper portion of the suspension bolt 110 while holding the position near the lower end of the brace bolt 120 while being in a relatively low position. , 4 and the fixing members 5, 6 can be easily inserted. FIG. 8 is a diagram showing an example in which the tip of the brace bolt 120 is inserted between the mounting portions 3 and 4 and the fixing members 5 and 6. For example, the operator brings the upper end portion (tip) of the brace bolt 120 closer to the open window 25 of the fixing members 5 and 6 as shown in FIG. 8 (a), and then the brace bolt as shown in FIG. 8 (b). By hooking the tip of the 120 on the open window 25 and moving it in the direction of the arrow F2, the insertion space for inserting the brace bolt 120 can be easily expanded. That is, since the fixing members 5 and 6 do not rotate with respect to the mounting portions 3 and 4, the operator can easily expand the insertion space. Then, as shown by the arrow F3 in FIG. 8C, the operator inserts the brace bolt 120 into the enlarged insertion space, so that the brace bolt 120 is placed between the mounting portions 3 and 4 and the fixing members 5 and 6. Can be placed in. Then, the lower end portion of the brace bolt 120 is inserted between the mounting portions 3 and 4 of the brace connecting metal fitting 1a attached to the lower portion of the hanging bolt 110 and the fixing members 5 and 6, and the two bolt members 7 and 8 are tightened. The brace bolt 120 can be temporarily fixed. After that, the operator fixes the brace bolt 120 in a state of being connected between the two hanging bolts 110 by tightening the two bolt members 7 and 8 of the brace connecting metal fitting 1b attached to the upper part of the hanging bolt 110. Therefore, the brace connecting metal fitting 1 of the present embodiment has a structure in which the brace bolt 120 can be easily inserted into the brace connecting metal fitting 1 attached to the upper part of the hanging bolt 110 even from a relatively low position. There is an advantage that work efficiency can be improved as compared with the conventional case.

As described above, the operator attaches the brace bolt 120 to the mounting portion 3 by tightening the two bolt members 7 and 8 with the brace bolt 120 inserted between the mounting portions 3 and 4 and the fixing members 5 and 6. It is fixed in a state of being sandwiched between 4 and the fixing members 5 and 6. At this time, since the recesses 26 of the fixing members 5 and 6 crush the screw threads formed on the outer peripheral surface of the brace bolt 120, the fixing members 5 and 6 and the brace bolt 120 are in a state of being engaged with each other, and the brace bolt 120 is displaced. It is possible to prevent angular displacement. That is, since the fixing members 5 and 6 are fixed by sandwiching the brace bolt 120 between the mounting portions 3 and 4 while maintaining the arrangement angle of the brace bolt 120 by tightening the bolt members 7 and 8. is there. Further, since the recess amount H of the recess 26 is smaller than the diameter of the brace bolt 120, the tips of the regulating portions 23 and 24 reach the mounting portions 3 and 4 when the recess 26 engages with the outer peripheral surface of the brace bolt 120. The recess 26 can reliably press the outer peripheral surface of the brace bolt 120.

In such a brace connecting metal fitting 1, since the fixing members 5 and 6 for fixing the brace bolt 120 to the mounting portions 3 and 4 do not rotate with respect to the mounting portions 3 and 4, even if a large-scale earthquake occurs. Even if there is, the brace bolt 120 can be firmly held, and the displacement amount of the suspension bolt 110 can be suppressed to a small size. The strength test that verified this will be described.

FIG. 9 is a diagram showing a configuration when a strength test of the brace connecting metal fitting 1 is performed. In the strength test, instead of the ceiling suspension 150, a frame material 200 connecting the lower ends of the four suspension bolts 110 is attached, and the frame material 200 is attached to the frame material 200 by a hydraulic cylinder 211 fixed to the wall surface 210 in the X direction. I applied a load. A load cell (load meter) 212 was arranged between the hydraulic cylinder 211 and the frame material 200, and the load by the hydraulic cylinder 211 was measured. Further, a wire-winding displacement meter 213 is installed on the suspension bolt 110a that supports the frame material 200 on the side opposite to the portion on which the load applied by the hydraulic cylinder 211 acts, and the suspension bolt 110a is displaced in the X direction. Was measured.

FIG. 10 is a diagram showing the results of the strength test. The solid line T1 in FIG. 10 shows the displacement amount when the brace connecting metal fitting 1 of the present embodiment is used, and the broken line T2 shows the displacement amount when the conventional product of Patent Document 1 is used. As shown in FIG. 10, in the brace connecting metal fitting 1 of the present embodiment, the displacement amount of the suspension bolt 110a when the same load is applied is smaller than that of the conventional product. That is, in the brace connecting metal fitting 1 of the present embodiment, since the fixing members 5 and 6 are not displaced relative to the mounting portions 3 and 4, the brace bolt 120 is always held in the same posture, so that the brace bolt 120 is obliquely used. It does not reduce the strength as a reinforcing material and suppresses an increase in the displacement amount of the suspension bolt 110a. On the other hand, in the conventional product, since the brace support bracket rotates around the connecting bolt, the posture of the brace support bracket changes according to the load, and the strength of the brace bolt 120 as an oblique reinforcing material is reduced. The displacement amount of the suspension bolt 110a is large due to the fact that the suspension bolt 110a is caused to be displaced. Therefore, the brace connecting metal fitting 1 of the present embodiment has higher strength than the conventional product whose posture changes around the connecting bolt, and exhibits an excellent steady rest effect.

Further, in the brace connecting metal fitting 1 of the present embodiment, since the mounting angles of the fixing members 5 and 6 with respect to the mounting portions 3 and 4 do not change, it is not necessary to adjust the angles when drawing. Therefore, even if the installation mode of the brace connecting metal fitting 1 must be drawn and submitted to the contractor, there is an advantage that the work efficiency at the time of drawing can be dramatically improved as compared with the conventional case. ..

As described above, the brace connecting metal fitting 1 of the present embodiment is attached with the fixing members 5 and 6 positioned with respect to the attachment portions 3 and 4, and the brace is attached between the attachment portions 3 and 4 and the fixing members 5 and 6. The bolt 120 can be installed at an arbitrary angle within a predetermined angle range. Therefore, in the brace connecting metal fitting 1 of the present embodiment, the tip of the brace bolt 120 can be easily inserted while the operator is at a relatively low position, and the suspension bolt 110 has a steady resting effect with a stronger strength than before. Further, it is possible to prevent the operator from accidentally arranging the brace bolt 120 at an angle outside the predetermined angle range.

Although one embodiment of the present invention has been described above, the present invention is not limited to the one described in the above embodiment. That is, the present invention includes those to which various modifications are applied to those described in the above embodiment.

For example, in the above embodiment, in order to keep the arrangement angle of the brace bolt 120 within a predetermined angle range, the first and second bolt members 7 and 8 are installed at predetermined intervals, and the fixing members 5 and 6 are installed. An example is shown in which the regulating portions 23 and 24 are provided at both ends of the locking portions 21 and 22. However, when the arrangement angle of the brace bolt 120 can be regulated within a predetermined angle range by installing the first and second bolt members 7 and 8 at predetermined intervals, the locking portion 21, The regulatory parts 23 and 24 of 22 are not particularly necessary. Further, when the arrangement angle of the brace bolt 120 can be regulated within a predetermined angle range by the regulating portions 23 and 24 of the locking portions 21 and 22, the first and second bolt members 7 and 8 brace. It is not necessary to regulate the arrangement angle of the bolt 120 within a predetermined angle range. Therefore, the brace connecting metal fitting 1 may be provided with only one of the regulation by the first and second bolt members 7 and 8 and the regulation by the regulation portions 23 and 24.

Further, in the above embodiment, the case where the mounting angle θ of the brace bolt 120 is regulated to be within the range of 45 ° ± 15 ° has been illustrated, but this angle range can be appropriately set and is limited to the above-mentioned range. It is not something that can be done.

Further, in the above embodiment, an example has been described in which a communication portion 14 that communicates with the insertion portion 13 is provided for the first holding plate portion 11 and the second holding plate portion 12 of the holding portion 2. However, the present invention is not limited to this, and for example, as shown in FIG. 11, the insertion portion 13 may be formed as a mere round hole. In this case, since the left and right sides of the insertion portion 13 can be connected to the vertical plate portion 10, there is an advantage that the mounting strength of the first holding plate portion 11 and the second holding plate portion 12 can be increased.

Further, in the above embodiment, an embodiment in which the fixing members 5 and 6 are attached to the attachment portions 3 and 4 by using the two bolt members 7 and 8 is illustrated. However, the mounting modes of the fixing members 5 and 6 are not necessarily limited to those described above. For example, a locking hole may be provided in advance at a predetermined position of the mounting portions 3 and 4, and a locking piece that engages with the locking hole may be provided on one end side of the fixing members 5 and 6. In this case, if the bolt member is attached to the other end side of the fixing members 5 and 6 with the locking pieces of the fixing members 5 and 6 locked in the locking holes of the mounting portions 3 and 4, the fixing members 5 and 6 can be attached. 6 can be mounted in a state of being positioned with respect to the mounting portions 3 and 4. Therefore, at least one bolt member is required to attach the fixing members 5 and 6 so as to be positioned with respect to the attachment portions 3 and 4.

Further, in the above embodiment, the fixing members 5 and 6 are attached to the attachment portions 3 and 4 by attaching the bolt members 7 and 8 to the screw holes 3a, 3b, 4a and 4b formed in the attachment portions 3 and 4. The case was illustrated. That is, in the above embodiment, the case where the fixing members 5 and 6 and the bolt members 7 and 8 are configured as separate bodies has been illustrated. However, the present invention is not limited to this, and the bolt members 7 and 8 may be integrally formed with the fixing members 5 and 6. FIG. 12 illustrates a case where the bolt members 7 and 8 are integrally formed with the fixing portion members 5 and 6. For example, the fixing members 5 and 6 may have bolt members 7 and 8 integrally formed with the flat plate portion 20 as shown in 12 (a). In this case, holes 3c, 3d, 4c, 4d through which bolt members 7 and 8 can be inserted are formed in the mounting portions 3 and 4 instead of the screw holes 3a, 3b, 4a and 4b described above. Then, as shown in FIG. 12B, the bolt members 7 and 8 provided in the fixing members 5 and 6 are inserted into the holes 3c, 3d, 4c and 4d, and the nut 9 is attached to the tip of the bolt members 7 and 8. By mounting, the fixing members 5 and 6 are mounted on the mounting portions 3 and 4. Further, FIG. 13 shows an example in which the fixing members 5 and 6 are formed of bolt members bent in a U shape. In the case of the example shown in FIG. 13, the bolt members 7 and 8 are formed at the tips of two rod-shaped bodies parallel to each other by being bent in a U shape. Even with such fixing members 7 and 8, there is no difference in that the above-mentioned effects are exhibited. Further, FIG. 14 shows an example in which the bolt members 7 and 8 are provided for the mounting portions 3 and 4. When the bolt members 7 and 8 are erected from the mounting portions 3 and 4 as shown in FIG. 14, the fixing members 5 and 6 insert the bolt members 7 and 8 into the holes 20a and 20b of the flat plate portion 20. , The nuts 9 are attached to the tips of the bolt members 7 and 8 to be attached to the attachment portions 3 and 4. In this case as well, the fixing members 5 and 6 are mounted in a state of being positioned with respect to the mounting portions 3 and 4.

1 (1a, 1b) ... Brace connecting metal fittings, 2 ... Holding part, 3, 4 ... Mounting part, 5, 6 ... Fixing member, 7 ... First bolt member, 8 ... Second bolt member, 20 ... Flat plate part , 20a ... 1st hole, 20b ... 2nd hole, 21.22 ... locking portion, 26 ... recess, 110 ... hanging bolt, 120 ... brace bolt.

Claims (7)

A holding part that holds the hanging bolt and
A pair of mounting portions extending from the holding portion at an angle substantially perpendicular to each other,
A pair of fixing members attached to each of the pair of attachment portions,
Have,
Each of the pair of fixing members is mounted in a state of being positioned with respect to the mounting portion by a bolt member, and when the bolt member is temporarily fixed, a brace bolt is placed within a predetermined angle range with the mounting portion. It is possible to insert the brace bolt at any angle, and by tightening the bolt member, the brace bolt is sandwiched and fixed between the brace bolt and the mounting portion while maintaining the insertion angle of the brace bolt. Brace connecting bracket. The brace connecting metal fitting according to claim 1, wherein the fixing member is mounted in a state of being positioned with respect to the mounting portion by a first bolt member and a second bolt member. 2. The fixing member according to claim 2, wherein the brace bolt inserted between the first bolt member and the second bolt member is sandwiched between the mounting portion and fixed. Brace connecting bracket. The fixing member is provided at a flat plate portion having a first hole through which the first bolt member can be inserted and a second hole through which the second bolt member can be inserted, and at both ends of the flat plate portion. The claim is characterized in that the locking portion has a locking portion, and by tightening the first and second bolt members, the locking portion is fixed in a state of being locked to the outer peripheral surface of the brace bolt. The brace connecting bracket according to 2 or 3. The brace connecting metal fitting according to claim 4, wherein the locking portion is provided with a regulating portion that regulates the insertion angle of the brace bolt within the predetermined angle range. The brace connecting metal fitting according to claim 4 or 5, wherein the locking portion is provided with a recess through which the brace bolt can be inserted within the predetermined angle range. The brace connecting metal fitting according to claim 6, wherein the amount of the recess is smaller than the diameter of the brace bolt.

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