JP2013245499A - Brace mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brace mounting structure in which a compression force does not act on a brace material.SOLUTION: A brace mounting structure for mounting a brace material 5 to a hanging material (hanger bolt 3) provided on the ceiling comprises a connection member 10 for connecting the brace material 5 to the hanging material and a receiving member (receiving nut 30) fixed to the hanging material 3. The connection member 10 includes a tubular part (cylinder part 10) having a larger inner diameter than an outer diameter of the hanging material 3 and configured to be movable along the hanging material 3. At one end side of the connection member 10 in an axial direction, the receiving member 30 is disposed and at another end side of the connection member 10 in the axial direction, a space for movement is positioned. In the state where a force acts in a tension direction of the brace material 5, the connection member 10 is abutted to the receiving member 30 and in the state where a force acts in a compression direction of the brace material 5, the connection member 10 moves to the space for movement.

Description

  The present invention relates to a brace attachment structure for attaching an upper end portion of a brace material to a suspension bolt provided on a ceiling portion.

  Hanging bolts are provided to suspend various equipment such as air conditioners and ceiling boards. The suspension bolt is suspended from a support structure such as an upper floor slab. A bracket for supporting the equipment and a ceiling base material for supporting the ceiling plate are connected to the lower end of the suspension bolt.

  In such a suspension structure, in order to improve the earthquake resistance, the suspension bolt is separated from the lower end portion of the suspension bolt and the upper end portion of another suspension bolt adjacent to the suspension bolt or from the lower end portion of the suspension bolt and the suspension bolt. A brace material is provided between the upper structure and the upper structure. In order to attach this brace material to the upper end portion of the suspension bolt, for example, an attachment fitting as shown in Patent Document 1 has been used.

  Further, when the brace material is bridged between the ceiling portion and the suspension bolt, the structure is as shown in FIG. The upper end portion of the brace material 100 is bolted to the ceiling portion 110 via a mounting bracket 101 formed by bending the plate, and the lower end portion of the brace material 100 is formed by bending the plate. It was bolted to the lower end of the suspension bolt 120 via the mounting bracket 102. The mounting bracket 102 is fixed to the air conditioning equipment 140.

JP 2011-190678 A

  By the way, in the mounting brackets 101 and 102 as described above, since both the upper end portion and the lower end portion of the brace material 100 are fixed to the suspension bolt or the ceiling portion, if the air conditioning equipment 140 is shaken due to an earthquake or the like, the brace Both the tensile force and the compressive force act on the material 100 alternately. Therefore, the brace material 100 may be buckled when it bears a compressive force.

  From such a viewpoint, an object of the present invention is to provide a brace mounting structure in which a compressive force does not act on the brace material.

  The invention according to claim 1 for solving the above problem is a brace mounting structure for mounting a brace material to a hanging material provided on a ceiling portion, and a connecting member for connecting the brace material to the hanging material; A receiving member fixed to the suspension member, and the connecting member includes a cylindrical portion having an inner diameter larger than an outer diameter of the suspension member, and is configured to be movable along the suspension member. The receiving member is disposed on one end side in the axial direction of the connecting member, a moving space is positioned on the other end side in the axial direction of the connecting member, and the connection is performed in a state in which a force acts in the pulling direction of the brace material. The member is in contact with the receiving member, and the connecting member is configured to move to the moving space in a state in which a force acts in the compression direction of the brace material.

  According to such a structure, the cylinder part can be moved up and down with respect to the suspension member in the movement space at the position opposite to the receiving member. Accordingly, when the suspension material is shaken due to an earthquake or the like and a compression force is about to act on the brace material, the connecting member moves to the moving space along the suspension material, so that the compression force can be released. Therefore, the compressive force does not act on the brace material, and the brace material can be prevented from buckling. On the other hand, when a tensile force acts on the brace material, the cylindrical portion is locked by the receiving member and the connecting member does not move, so that the tensile force can be countered.

  The invention according to claim 2 is characterized in that the connecting member further includes a bracket formed on an outer periphery of the cylindrical portion, and the brace material is attached to the bracket. According to such a configuration, the brace material can be easily attached to the connecting member.

  According to the brace mounting structure according to the present invention, the compressive force that acts on the brace material can be released, so that buckling of the brace material can be prevented.

It is the side view which showed the steady rest structure reinforced using the brace attachment structure which concerns on embodiment of this invention. It is the perspective view which showed the brace attachment structure which concerns on embodiment of this invention. It is a partially broken side view showing a brace mounting structure according to an embodiment of the present invention. (A) And (b) is the perspective view which showed the connection member of the other form. It is the partially broken side view which showed the connection member of the other form. It is the perspective view which showed the other attachment state of the connection member. It is the perspective view which showed the attachment state of the connection member of another form. It is the partially broken side view which showed the attachment state of the connection member which connects the lower end part of a brace material. It is the perspective view which showed the other form of the connection member. It is the top view which showed other forms of the connection member. It is the side view which showed the other form of the steadying structure. It is the figure which showed the other form of the connection member, Comprising: (a) is the top view which showed the completion state, (b) is the top view which showed the opening state. It is the side view which showed the other state which connects the lower end part of a brace material to a suspension bolt. It is the side view which showed the conventional steady rest structure.

  A brace mounting structure according to a first embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the configuration of the brace mounting structure will be described by exemplifying a case where the air conditioning equipment is suspended from the upper floor slab. In addition, the apparatus to suspend is not limited to an air conditioning apparatus.

  As shown in FIG. 1, the air conditioning equipment 1 is supported by a plurality of suspension bolts (suspending members) 3 suspended from an upper floor slab 2. The suspension bolts 3 are provided, for example, at the four corners of the air conditioning equipment 1 (only two front portions are shown in FIG. 1), and are bolted to the air conditioning equipment 1 via L-shaped brackets 4. A brace material 5 is bridged between a lower end portion of the suspension bolt 3 and an upper end portion of another suspension bolt 3 adjacent to the suspension bolt 3. The brace material 5 is provided as a seismic reinforcement material and a steadying material at the time of an earthquake. The suspension bolt 3 and the brace material 5 are constituted by long bolts. In addition, the brace material 5 is not limited to a long volt | bolt, The angle material and cross-section plate material of L-shaped cross section may be sufficient.

  The brace attachment structure according to this embodiment is for attaching the upper end of the brace material 5 to the suspension bolt 3. As shown in FIGS. 1 to 3, the brace mounting structure includes a connecting member 10 that connects the brace material 5 to the suspension bolt 3, and a receiving nut (receiving member) 30 that is screwed to the suspension bolt 3. .

  The connecting member 10 includes a cylindrical portion (tubular portion) 11 and a bracket 21 formed on the outer periphery of the cylindrical portion 11. The cylindrical portion 11 has an inner diameter larger than the outer diameter of the suspension bolt 3, and the cylindrical portion 11 is disposed so as to surround the suspension bolt 3. A suspension bolt 3 is inserted into the inner space of the cylindrical portion 11. Since there is a gap between the inner peripheral wall 12 of the cylindrical portion 11 and the outer peripheral surface of the suspension bolt 3, the cylindrical portion 11 can move up and down with respect to the suspension bolt 3. As shown in FIG. 4, the shape of the cylindrical portion 11 is not limited to a cylinder, and if the vertical movement is possible with respect to the suspension bolt 3, a rectangular cross section (see FIG. 4A) or It may have an elliptical cross section (see FIG. 4B). Further, as shown in FIG. 5, the inner peripheral wall 12a may be inclined so that a part of the inner diameter of the cylindrical portion 11 is reduced. In FIG. 5, the intermediate portion in the height direction of the cylindrical portion 11 has the smallest diameter. According to such a configuration, the area of the contact portion between the connection member 10 and the suspension bolt 3 can be reduced, and friction between the connection member 10 and the suspension bolt 3 can be reduced.

  The bracket 21 projects radially outward from the outer peripheral surface of the cylindrical portion 11 and extends along the axial direction. The bracket 21 is fixed to the outer peripheral surface of the cylindrical portion 11 by welding. A bolt insertion hole (not shown) is formed in the bracket 21, and a connection fitting 40 for connecting the brace material 5 is bolted.

  The connection fitting 40 includes a first flat plate portion 41a and a second flat plate portion 41b and has an L-shaped cross section. Bolt insertion holes (not shown) are formed in the flat plate portions 41a and 41b of the connection fitting 40, respectively. The first flat plate portion 41a of the connection fitting 40 and the bracket 21 are in surface contact and are fixed by bolts 22 and nuts 23 (see FIG. 1). The end of the brace material 5 is inserted through the bolt insertion hole of the second flat plate portion 41b. The brace material 5 is fixed to the second flat plate portion 41 b with a nut 23.

  The receiving nut 30 is provided below the connecting member 10. One connecting member 10 is placed on the receiving nut 30, and the connecting member 10 is supported by the receiving nut 30. In the present embodiment, the lower side of the connecting member 10 is the side on which the connecting member 10 tends to move when a force acts in the pulling direction of the brace material 5. The receiving nut 30 is screwed to the suspension bolt 3 and can be adjusted in height. The receiving nut 30 is disposed above the connecting member 10 placed on the receiving nut 30 at such a height that a gap is formed as a moving space for the connecting member 10. The receiving nut 30 is composed of, for example, a double nut and is difficult to loosen. The receiving nut 30 is not limited to a double nut.

  In the present embodiment, as shown in FIG. 1, one connecting member 10 is provided on the receiving nut 30, and one brace material 5 is connected to the upper end of one suspension bolt 3. However, when connecting a plurality of brace members in a plurality of directions to the upper end of one suspension bolt, a plurality of connecting members are provided on the receiving nut or a plurality of brackets are formed. A connecting member may be used. Specifically, as one configuration in the case where two brace members are connected to the upper end portion of one suspension bolt, as shown in FIG. 6, two connecting members (in FIG. What is necessary is just to arrange 10 and 10 in the up-down direction. If it does in this way, the brace materials 5 and 5 can be connected to the connection members 10 and 10 one by one, respectively. As another configuration, as shown in FIG. 7, one connecting member 10 including two brackets 21 may be provided on the nut 30. In this case, the attachment angle of each bracket 21, 21 to the cylindrical portion 11 is set according to the installation angle of the brace material 5 to be connected. In this way, one brace material 5 can be connected to each of the brackets 21, 21 of one connecting member 10.

  Further, in the present embodiment, as shown in FIG. 1, the connection fitting 40 and the connecting member 10 are also used when the lower end portion of the brace material 5 is attached to the lower end portion of the suspension bolt 3. In this case, a receiving nut 30 is provided below the connecting member 10, and a presser nut 35 is provided above the connecting member 10. The connecting member 10 is sandwiched between the receiving nut 30 and the presser nut 35 and is fixed in a state in which it cannot move up and down. The presser nut 35 is also composed of a double nut like the receiving nut 30 and is not easily loosened. Since the other structure is the same as the attachment structure of the upper end part of the brace material 5, it attaches | subjects the same code | symbol and abbreviate | omits description.

  In addition, the attachment structure to the lower end part of the suspension bolt 3 of the lower end part of the brace material 5 is not limited to the said structure, You may fix with welding or a normal attachment metal fitting. Furthermore, as a connecting member for attaching the lower end portion of the brace material 5 to the lower end portion of the suspension bolt 3, a member in which a female screw 13 is formed on the inner peripheral surface of the cylindrical portion 11 as shown in FIG. According to such a configuration, since the female screw 13 is screwed onto the suspension bolt 3 and the height position of the connecting member 10 is fixed, the receiving nut 30 and the presser nut 35 (see FIG. 1) above and below the connecting member 10. There is no need to provide.

  According to the brace mounting structure configured as described above, the connecting member 10 can move up and down with respect to the suspension bolt 3 above the receiving nut 30 and is lowered below the upper surface of the receiving nut 30. Absent. Therefore, even if the air conditioning equipment 1 and the suspension bolt 3 are shaken by an earthquake or the like and the brace material 5 is pushed to the upper end side and a compression force is about to act, the connecting member 10 moves along the suspension bolt 3 to the moving space. By doing (see the arrow in FIG. 3), the compression force can be released. Thereby, a compressive force does not act on the brace material 5.

  On the other hand, when the air-conditioning equipment 1 and the suspension bolt 3 are swung in the opposite direction to each other and a tensile force is applied to the brace material 5, the cylindrical portion 11 is locked by contacting the receiving nut 30 and connected to the connecting member. Since 10 does not move downward, it can resist the tensile force. At this time, at the lower end portion of the brace material 5, the connecting member 10 is pressed by a presser nut 35 (when the connecting member 10 with the female screw 13 is used, the connecting member 10 is pressed by screwing of the female screw 13).

  As described above, according to the brace mounting structure of the present embodiment, the bracing material 5 exerts a steadying effect only by applying a tensile force without applying a compressive force to the brace material 5. Therefore, the brace material 5 can be prevented from buckling.

  Moreover, in this brace attachment structure, the installation height of a connection member can be easily changed by rotating the receiving nut 30.

  Furthermore, since the connecting member 10 can rotate around the suspension bolt 3, the direction of the brace material 5 can be freely set. Furthermore, since the bracket 21 provided with the bolt insertion hole is provided on the outer periphery of the cylindrical portion 11 and the brace material 5 is connected via the connection fitting 40 provided with the bolt insertion hole, the brace can be formed without deforming the fitting. The inclination angle of the material 5 can be set freely.

  In addition, in the said embodiment, while moving space was formed above the connection member 10 in the upper end part of the brace material 5, and the upper and lower sides of the connection member 10 in the lower end part of the brace material 5 were fixed, it turned upside down. May be. That is, a receiving member is provided above the connecting member at the lower end portion of the brace material to form a moving space below, and the upper and lower portions of the connecting member at the upper end portion of the brace material may be fixed (the top and bottom of FIG. It becomes the structure that was made.) In addition, the lower side of the connecting member on the lower end side of the brace material is a moving space, but since the connecting member on the upper end side is fixed, the connecting member on the lower end side is lowered in normal times. Absent.

  With such a structure, even if the air conditioning equipment and suspension bolts are shaken by an earthquake or the like, and the compression force is about to act on the brace material, the connecting member on the lower end side moves downward along the suspension bolt. The compression force can be released by moving to (lowering). Thereby, the compressive force does not act on the brace material. On the other hand, when the air-conditioning equipment and the suspension bolt swing in the opposite direction and a tensile force acts on the brace material, the cylindrical portion on the lower end side is locked by contacting the receiving nut, and the connecting member is Since it does not move upward, it can counter the tensile force.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, A design change, such as a material, a shape, and a magnitude | size, is suitably possible in the range which does not deviate from the meaning of this invention. is there. For example, in the said embodiment, although the one bracket 21 is provided in the cylindrical part 11, it is not limited to this. For example, as shown in FIG. 9, brackets 21 may be provided radially on the outer peripheral surface of the cylindrical portion 11 in four directions. The brackets 21, 21,... Are arranged at a 90-degree pitch with the axis of the cylindrical portion 11 as the center. Each bracket 21 is formed with a bolt insertion hole 25. According to such a structure, a brace material can be attached to a maximum of four directions from one suspension bolt. It is not necessary to use all the brackets 21, and versatility can be improved.

  Further, the number of brackets is not limited to four, and may be two, three, or five or more. Further, the arrangement pitch of the brackets is not limited to 90 degrees, and the brackets may be arranged at equal intervals at a pitch of 30, 45, or 60 degrees, or may be appropriately decentered at a free angle. . In particular, as shown by a two-dot chain line in FIG. 9, the brackets 21 arranged at a pitch of 45 degrees are between the suspension bolts arranged in a square shape in plan view and adjacent to each other on the square side. This can be effectively used in the case of providing brace materials both between the bolts and between the hanging bolts adjacent on the diagonal.

  Furthermore, in the connection member 10 of FIG. 9, the resin film 15 is formed in the inner peripheral part of the cylindrical part 11, and it is comprised easily to a sliding bolt. A chamfered surface 16 is formed on the upper and lower end portions of the inner peripheral surface of the resin film 15, and the end portions are not easily chipped even when contacting with the suspension bolt.

  Moreover, in the said embodiment, although the bracket 21 is arrange | positioned along the plane which passes along the axial center of the cylindrical part 11, you may provide eccentrically from the plane L which passes along the axial center S, as shown in FIG. . Specifically, the bracket 21 is provided in parallel to the plane L at a position shifted from the plane L passing through the axis S. The bracket 21 is fixed to the outer peripheral surface of the cylindrical portion 11 by welding. According to such a configuration, since the position of the brace material 5 to be attached is also eccentric, it is possible to prevent the brace materials 5 from interfering with each other at a position where the brace materials 5 intersect each other.

  Furthermore, in the said embodiment, although the upper end part of the brace material 5 is attached to the upper end part of the suspension bolt 3 which is supporting the air-conditioning equipment 1, it is not limited to this. The upper end portion of the brace material 5 may be attached to the upper end portion of a suspension bolt (not shown) that supports the ceiling plate, or may be attached to the upper floor slab 2. When attaching to the upper floor slab 2, as shown in FIG. 11, a cap nut 6 is embedded in the lower part of the floor slab 2, and a short suspension member (hanging bolt 3 a) is suspended to brace the same as in the above embodiment. What is necessary is just to attach with an attachment structure. The length of the suspension bolt 3a should just be more than the dimension which combined the height of the receiving nut 30, the height of the connection member 10, the upper clearance height, and the screwing length to the cap nut 6. FIG.

  Moreover, although the said embodiment demonstrated the case where the brace attachment structure was applied to the structure which suspends the air-conditioning equipment 1 from the upper floor slab 2, it is not limited to this, Other equipment is suspended. Needless to say, the present invention can be applied to a suspension bolt or a suspension bolt that suspends a ceiling plate. The suspension material is not limited to the suspension bolt. Further, the receiving member is not limited to the receiving nut.

  Furthermore, in the above-described embodiment, the cylindrical portion 11 which is a cylindrical portion is integrally formed from one member, but has a structure in which the cylindrical portion is divided into two and the suspension bolt 3 is surrounded from the horizontal direction. May be. Specifically, as shown in FIG. 12, the cylindrical portion is divided into two parts in plan view to form a pair of C-shaped members 11a and 11b. One end portions of the C-shaped members 11a and 11b are pin-coupled. The C-shaped members 11a and 11b rotate around the pin 17, and the other end can be opened. Bracket members 21a and 21b formed by dividing the bracket in the thickness direction are formed at the other ends of the C-shaped members 11a and 11b, respectively. With the other ends of the C-shaped members 11a and 11b closed, the bracket members 21a and 21b overlap each other to form the bracket 21 (see FIG. 12A). The bracket members 21a and 21b are integrated by being tightened in the thickness direction by bolts and nuts (not shown). When the connecting member 10 having such a configuration is fixed to the suspension bolt 3, as shown in FIG. 12B, the other ends of the C-shaped members 11a and 11b and the bracket members 21a and 21b are opened. After moving from the side of the suspension bolt 3 in the state, the other end portions of the C-shaped members 11a and 11b are closed so as to surround the suspension bolt 3 as shown in FIG. Then, a connection fitting (not shown) is installed, and the bracket members 21a and 21b are tightened together with the connection fitting with bolts and nuts. As a result, the bracket members 21 a and 21 b are integrated to form the bracket 21, and the other ends of the C-shaped members 11 a and 11 b are closed and integrated to form the cylindrical portion 11. The inner peripheral surface of the cylindrical portion 11 is spaced from the outer periphery of the suspension bolt 3 by a predetermined distance so that the connecting member 10 can move along the suspension bolt 3. According to the connecting member 10 having such a configuration, it is not necessary to attach the connecting member 10 from the lower end portion of the suspension bolt 3, and the installation work can be performed at the installation height, so that the installation is facilitated.

  Moreover, in the said embodiment, when attaching the lower end part of the brace material 5 to the lower end part of the suspension bolt 3, as shown in FIG. 1, while providing the presser nut 35 on the upper side of the connection member 10, and a receiving nut on the lower side. 30 and the connecting member 10 is sandwiched between the presser nut 35 and the receiving nut 30, but is not limited thereto. As shown in FIG. 13, a gap may be provided between the lower end portion of the connecting member 10 and the bracket 4. In such a configuration, when a tensile force is applied to the brace material 5, the connecting member 10 is locked by coming into contact with the presser nut 35 from below, and the connecting member does not move upward, so that the tensile force Can be countered. Further, when a compressive force is about to act on the brace material, the connecting member 10 moves (lowers) along the suspension bolt to the lower moving space, so that the compressive force can be released. Thereby, the compressive force does not act on the brace material.

  Furthermore, it is preferable to replace the suspension bolt 3 with a larger diameter or cover the suspension bolt 3 with a composite pipe so that the strength of the suspension bolt 3 is higher than that of the brace material 5. With such a configuration, not only can the buckling of the brace material 5 be prevented, but also the resistance to the compressive force acting on the suspension bolt 3 can be strengthened, so that the buckling of the suspension bolt 3 can also be suppressed, and the entire ceiling structure The rigidity of can be further increased.

DESCRIPTION OF SYMBOLS 1 Air-conditioning equipment 3 Hanging bolt 5 Brace material 10 Connecting member 11 Cylindrical part 21 Bracket 30 Receiving nut

Claims (2)

A brace attachment structure for attaching a brace material to a suspension member provided on a ceiling,
A connecting member for connecting the brace material to the suspension material;
A receiving member fixed to the suspension member,
The connecting member includes a cylindrical portion having an inner diameter larger than the outer diameter of the suspension member, and is configured to be movable along the suspension member.
The receiving member is arranged on one end side in the axial direction of the connecting member, and a moving space is located on the other end side in the axial direction of the connecting member,
In a state where a force acts in the pulling direction of the brace material, the connecting member abuts on the receiving member,
The brace mounting structure, wherein the connecting member is configured to move to the moving space in a state in which a force acts in the compression direction of the brace material. The connecting member further includes a bracket formed on the outer periphery of the cylindrical portion,
The brace attachment structure according to claim 1, wherein the brace material is attached to the bracket.

Images