JP2015090199A - Buckling prevention tool for suspension type support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a buckling prevention tool for a suspension type support device capable of performing buckling prevention of a suspension bolt with a simple work, in the suspension type support device of a B kind earthquake proof support system.SOLUTION: A pair of side surface reinforcement materials 1 is formed. The side surface reinforcement materials 1 are arranged along a longitudinal side surface opposite to a suspension bolt 10. A reinforced body 5 is composed of the side surface reinforcement materials 1 and a connection bolt 6 connecting the side surface reinforcement materials 1. The periphery of the suspension bolt 10 is surrounded in a close contact manner with the side surface reinforcement materials 1 of the reinforced body 5. A plurality of spacers 4 crimped on the outside surface of the suspension bolt 10 is provided on the inside surfaces of the side surface reinforcement materials 1. A stationary nut 11 screwed into the suspension bolt 10 is stored inside the reinforced body 5.

Description

  The present invention relates to a buckling preventer for a suspension support device that enhances the earthquake resistance of the suspension support device.

  The suspension type support device used in electrical facilities, for example, suspends horizontal members with vertical suspension members such as suspension bolts installed on the ceiling slab, and ducts, cables, pipes, etc. Is a device that horizontally supports

  In order to increase the seismic strength of this type of suspension-type support device, seismic measures based on the “Guidelines for Seismic Design and Construction of Building Facilities” have been taken. In this guideline, two types of seismic support methods, A type and B type, are shown as the seismic support methods of the suspension type support device.

  The class A seismic support system is a system in which a high-strength member is used for the vertical suspension so as not to be deformed even by a strong earthquake shake. Therefore, in this Class A seismic support, for example, a strong member such as L-shaped steel is used, so extremely strong strength can be obtained. However, since it is necessary to firmly fix the upper and lower ends of the heavy shaped steel, it takes a lot of time and effort to install the vertical suspension material, and there is a disadvantage that the cost is increased.

  On the other hand, the class B seismic support system is a simple system using bolts for the vertical suspension material and the diagonal material. In this class B seismic support system, the compressive force acting on the suspension bolts due to the upper and lower components of the tension applied to the diagonal material due to the shaking of the earthquake is offset by the tensile force transmitted from the weight of the members such as racks, cables and pipes. This is a method for preventing deformation of the suspension bolt at the time.

  According to this class B seismic support system, since it is a simple system using a suspension bolt for a vertical suspension material, construction is also easy and cost-effective. However, since the compression force acting on the vertical suspension material is offset by the tensile force due to the weight of each member supported by the vertical suspension material, the compression force generated by the horizontal seismic force is greater than the tensile force due to the weight. In addition, there is an inconvenience that the strength is weaker than that of the class A earthquake resistant support system.

  Therefore, the present applicant has solved the inconveniences of these conventional seismic support systems, enables simple construction of the Class B seismic support system, and is a suspension type that has the same buckling strength as the Class A seismic support system. A support device has been filed earlier (see Patent Documents 1 and 2).

  The suspension type support device of Patent Document 1 is formed by forming a compressive force resistor made of a tubular body or a grooved steel material and surrounding the suspension bolt used for a vertical suspension member with this compressive force resistor. And when the axial compressive force acts on the suspension bolt, the upper and lower ends of the compressive force resistor come in contact between the upper and lower mounting parts of the vertical suspension material to resist the compressive force and prevent the suspension bolt from buckling To do.

  Moreover, the suspension type support device of Patent Document 2 relates to a compressive force resistor when a suspension bolt is coupled to an angle member (horizontal member) fixed to a ceiling slab. And also in this compressive force resistor, the upper and lower ends contact between the horizontal suspension member of the vertical suspension member and the upper fixture to resist the compressive force, thereby preventing the buckling of the suspension bolt. .

Japanese Patent No. 3156153 Japanese Patent No. 2961365

  As described above, the conventional compressive force resistor has a structure in which the upper and lower ends of the compressive force resistor are brought into contact between the upper and lower mounting portions of the suspension bolt to resist the compressive force, thereby buckling the suspension bolt. It has been successfully prevented. However, at the time of construction, it has been necessary to accurately match the dimensions of the compressive force resistor with the length between the upper and lower mounting portions of the suspension bolt.

  That is, when the horizontal member is suspended with the suspension bolts, it is necessary to individually adjust the connection positions of the horizontal members in each suspension bolt in order to make the heights of the plurality of horizontal members constant. For example, when a suspension bolt is connected via an anchor or angle member fixed to a ceiling slab, the distance between the upper and lower attachment portions of the suspension bolt changes depending on the anchor or angle member fixing position. Moreover, in general buildings, the bottom surface of the ceiling slab is rarely in a uniform and accurate horizontal state, and the concrete surface often has some unevenness. Therefore, in order to adjust the height of the horizontal member to be constant, it is necessary to adjust the connection position of the horizontal members in the suspension bolt and align the height of the horizontal member.

  Thus, in the suspension bolt used for the suspension type support device, the interval between the upper and lower attachment portions of the suspension bolt is not constant. Therefore, in a structure that resists compressive force by contacting the upper and lower ends of the compression force resistor between the upper and lower mounting portions of the suspension bolt, as in the conventional compression force resistor, between the upper and lower mounting portions of each suspension bolt. It was necessary to adjust the length of the compressive force resistor in accordance with the interval.

  However, when a cable or the like is supported using a suspension type support device, it is necessary to use a large number of suspension bolts. Therefore, there has been a problem that requires a lot of labor such as adjusting the lengths of a large number of compressive force resistors in accordance with the distance between the upper and lower mounting portions of each suspension bolt.

  Therefore, the present invention was created to solve the above-described problems, and a suspension type support device having a buckling strength similar to that of a class A earthquake resistant support method in a class B earthquake resistant support method using suspension bolts. The purpose of the present invention is to provide a buckling prevention tool for a suspension type support device that can prevent buckling of a suspension bolt by a simpler operation.

  In order to achieve the above-mentioned object, the first means in the present invention is to suspend the horizontal member 20 with a suspension bolt 10 used as a vertical suspension member, and to support the supported body P horizontally on the horizontal member 20. A buckling prevention device to be mounted on the suspension bolt 10 of the suspension type support device constructed as described above, and forming a pair of side reinforcements 1 respectively disposed along the opposing longitudinal side surfaces of the suspension bolt 10 itself, The reinforcing body 5 that connects the side reinforcing materials 1 to each other is configured so that the side reinforcing material 1 surrounds the suspension bolt 10 in close contact, and when the hanging bolt 10 receives an axial compressive force, the hanging bolt 10 This is because the reinforcing body 5 is provided so as to prevent buckling.

  In the second means, the reinforcing body 5 is constituted by the side reinforcing material 1 and a connecting bolt 6 for connecting the side reinforcing materials 1 to each other, and the side reinforcing material 1 has an L-shaped cross section. A reinforcing portion 2 that surrounds the outer surface of the suspension bolt 10 and a connecting piece 3 that extends from both ends of the reinforcing portion 2 and through which a connecting bolt 6 that connects the side reinforcing material 1 is provided, are provided. 1 The connection piece 3 which mutually overlap | superposed is comprised so that the connection bolt 6 may connect.

  The third means is that in the reinforcing body 5, a plurality of spacers 4 installed at intervals along the longitudinal direction of the side reinforcing material 1 on the inner side surface of the side reinforcing material 1 or continuous along the longitudinal direction. A fixing nut 11 that is provided so as to connect the side reinforcements 1 to each other via the spacer 4, and in which the inner diameter of the reinforcing body 5 is screwed to the upper and lower ends of the suspension bolt 10. It is composed to the size to enclose.

  4th means WHEREIN: The said reinforcement body 5 is comprised by the connection bolt 6 which connects the said side reinforcement 1 and this side reinforcement 1, and the said side reinforcement 1 comprises the planar U shape, A plurality of spacers 4 are formed that surround the outer surface of the suspension bolt 10 from three directions, and are installed on the inner surface of the side surface reinforcing material 1 at intervals along the longitudinal direction of the side surface reinforcing material 1 or A spacer 4 that is continuous along the longitudinal direction is provided, and the side reinforcing members 1 combined through the spacer 4 are connected by connecting bolts 6 that pass through each other.

  The fifth means is that in the reinforcing body 5, the spacer 4 has an L-shaped cross section, and the outer surface of the suspension bolt 10 is attached to the spacer 4 when the side reinforcing members 1 are connected to each other. It is configured to be crimped from all sides.

  According to the first aspect of the present invention, the pair of side reinforcing members 1 respectively disposed along the opposing longitudinal side surfaces of the suspension bolt 10 itself are formed, and the periphery of the suspension bolt 10 is in close contact with the side reinforcement member 1. The side reinforcements 1 are connected to each other so as to surround each other, and the reinforcement body 5 is provided to prevent the suspension bolt 10 from buckling when the suspension bolt 10 receives an axial compressive force. Thus, the reinforcing body 5 can be attached to the suspension bolt 10 by the operation of connecting the side surface reinforcing members 1 to each other, so that it is possible to prevent buckling of the suspension bolt by a simple operation.

  In addition, since the reinforcing body 5 is reinforced by crimping to the side surface of the suspension bolt 10, the upper and lower ends of the compression force resistor are placed between the upper and lower mounting parts of the suspension bolt as in the conventional compression force resistor. There is no need to make contact. Therefore, many operations such as adjusting the lengths of a large number of compressive force resistors in accordance with the distance between the upper and lower mounting portions of the suspension bolt are no longer necessary. As a result, in the suspension type support device that has the same buckling strength as the class A earthquake resistant support method in the class B earthquake resistant support method using the suspension bolt, it is easier to prevent the suspension bolt from buckling than before. It can be done with.

  According to the second aspect, the reinforcing body 5 is configured so that the side connection members 1 are connected to each other by the connecting bolts 6, so that the reinforcing body 5 is attached to the suspension bolt 10. Can be made easier.

  According to the third aspect of the present invention, the reinforcing body 5 includes the spacer 4 installed on the inner side surface of the side reinforcing material 1 and is provided so as to connect the side reinforcing materials 1 to each other via the spacer 4. The support position in the direction perpendicular to the axis 10 is not limited to the upper and lower ends of the suspension bolt 10, but is also constrained by the spacer 4 in the direction perpendicular to the axis and in the direction of bending rotation. Thereby, the buckling length which determines the buckling strength of a suspension bolt is shortened, the design which improved the constraint conditions is attained, and buckling load and compressive strength can be raised. The side reinforcing material 1 does not bear a compressive load in principle, and it is not necessary to accurately match the distance between the upper and lower attachment parts of the suspension bolt.

  And the reinforcement body 5 reinforce | strengthens the cross-sectional characteristic of the reinforcement body 5 because the internal diameter of the reinforcement body 5 was comprised in the size surrounding the fixing nut 11 screwed by the upper-and-lower-ends part of the said suspension bolt 10. FIG. This also improves the bending strength and the support strength of the spacer portion.

  According to the fourth aspect of the present invention, the side reinforcing material 1 is formed by the side reinforcing material 1 that uses the spacer 4 by forming the reinforcing portion 2 that is formed in a U-shape and surrounds the outer surface of the suspension bolt 10 from three directions. There is an effect of further increasing the buckling strength of the suspension bolt 10.

  As in claim 5, the spacer 4 has a flat cross-sectional L shape, V shape, semicircular shape, etc., and the outer surface of the suspension bolt 10 is connected to the spacer when the side reinforcing members 1 are connected to each other. By being configured to be crimped from the periphery at 4, the buckling can be reliably prevented even if the buckling direction of the suspension bolt 10 is different.

It is a use front view showing one example of the present invention. It is a principal part disassembled perspective view which shows one Example of this invention. It is a top view which shows one Example of this invention. It is a side view which shows one Example of this invention side surface reinforcing material. It is principal part sectional drawing which shows the usage example of this invention. It is principal part sectional drawing which shows the usage example of this invention. It is a use front view showing other examples of the present invention. It is a principal part disassembled perspective view which shows the other Example of this invention. It is a top view which shows the other Example of this invention. It is a side view which shows the other Example of this invention side surface reinforcing material.

  According to the present invention, in a suspension type support device having a buckling strength similar to that of a class A earthquake resistant support method in a class B earthquake resistant support method using suspension bolts, conventional mounting work for preventing buckling of the suspension bolts is performed. It achieved the original purpose of being able to do it with simpler work.

  Examples of the present invention will be described below. This invention is a buckling prevention tool with which the suspension bolt 10 of a B class earthquake-proof support system is mounted | worn. That is, the horizontal member 20 is suspended by a suspension bolt 10 used as a vertical suspension member, and the suspension bolt 10 of the suspension type support device configured to horizontally support the supported body P on the horizontal member 20 is mounted. (See FIGS. 1 and 7).

  The present invention includes a pair of side reinforcements 1 for one suspension bolt 10. The side reinforcement 1 is a member that is disposed along the opposing longitudinal side surfaces of the suspension bolt 10 itself, and is provided so as to surround the suspension bolt 10 with the side reinforcement 1 in close contact.

  The reinforcing body 5 is configured by connecting the pair of side surface reinforcing materials 1 to each other. This reinforcement body 5 prevents buckling of the suspension bolt 10 by the buckling strength of the reinforcement body 5 that surrounds the suspension bolt 10 in close contact when the suspension bolt 10 receives an axial compressive force. It is provided as follows.

  The reinforcing body 5 of the present invention includes a pair of side reinforcements 1 and connection bolts 6 that connect the side reinforcements 1 to each other. The side reinforcing material 1 shown in FIG. 1 to FIG. 7 is a side reinforcing material 1 having a planar L shape, and is provided with a reinforcing portion 2 and a connecting piece 3 (see FIG. 2). The reinforcing portion 2 is a portion having a flat L shape surrounding the outer surface of the suspension bolt 10, and the connecting piece 3 is a portion extended from both ends of the reinforcing portion 2. A bolt insertion hole 3A is opened in the connecting piece 3 (see FIG. 4). The connecting bolt 6 is inserted into the bolt insertion hole 3A, and the side reinforcing members 1 are connected to each other by a fixing nut 6A (see FIG. 3). When the side reinforcement 1 is made of a material having sufficient buckling resistance, it is possible to prevent the suspension bolt 10 from buckling by attaching the side reinforcement 1 directly to the side of the suspension bolt 10. (Not shown).

  The reinforcing body 5 shown in the figure is provided with a spacer 4 that is crimped to the outer surface of the suspension bolt 10 on the inner surface of the side reinforcing material 1 (see FIG. 2). The side reinforcing materials 1 are connected via the spacer 4. The spacer 4 in the illustrated example shows a plurality of spacers 4 installed at intervals along the longitudinal direction of the side reinforcing material 1 (see FIG. 4). Moreover, the spacer 4 can also be arrange | positioned so that it may continue along the longitudinal direction of the side surface reinforcing material 1 (not shown). When the spacer 4 is arranged inside the side reinforcing material 1, even if the buckling strength of the side reinforcing material 1 is not sufficient, the suspension bolt 10 can be prevented from buckling in combination with the spacer 4. . Therefore, it is possible to reduce the weight of the side reinforcing material 1.

  The illustrated spacer 4 has an L-shaped cross section (see FIG. 2). And it is comprised so that the outer side surface of the suspension bolt 10 may be crimped | bonded from the four directions by the said spacer 4 when the side surface reinforcing materials 1 are connected (refer FIG. 3). The spacer 4 is formed in a V-shape, a semicircular shape or the like in addition to the L-shaped flat cross section, and the outer surface of the suspension bolt 10 is crimped from the periphery with the spacer 4 when the side reinforcing members 1 are connected to each other. It is also possible to configure as described above. By using such a spacer 4, it becomes possible to store the fixing nut 11 screwed to the upper and lower ends of the suspension bolt 10 inside the reinforcing body 5. (See FIGS. 5 and 6). Such a reinforcing body 5 can reinforce the entire suspension bolt 10 in a range including up to the upper and lower fixing nuts 11 of the suspension bolt 10 to further enhance safety during reinforcement. Furthermore, since the inner diameter of the reinforcing body 5 is configured to surround the fixed nut 11, the buckling strength can be obtained depending on the position of the spacer 4 even when the upper fixed nut 11 is not accommodated. .

  The suspension type support device to which the buckling prevention tool of the present invention is attached can be applied to various types. For example, the suspension support device shown in FIG. 1 shows a suspension support device of a type that uses a suspension bolt 31 for the slanted suspension member 30, but the suspension bolt of a suspension support device of the other type. 10 is applicable.

  The reinforcing body 5 shown in FIG. 7 to FIG. 10 is such that the side surface reinforcing member 1 has a U-shape (see FIG. 8). The side reinforcing material 1 is formed with a reinforcing portion 2 that surrounds the outer surface of the suspension bolt 10 from three directions (see FIG. 9). Then, a bolt insertion hole 2A is opened in the side reinforcing material 1, and a plurality of spacers 4 to be crimped to the outer surface of the suspension bolt 10 are arranged inside the side reinforcing material 1 at equal intervals (see FIG. 10). . Then, the connecting bolts 6 are passed through the bolt insertion holes 2A of the side reinforcing members 1 combined through the spacer 4, and the side reinforcing members 1 are connected to each other by the fixing nut 6A (see FIG. 9).

  In addition, the shape of the side reinforcing material 1 and the spacer 4 of the present invention is not limited to the illustrated example, and may be changed to other shapes as long as the gist of the present invention is not changed.

P Supported body Q Ceiling slab R Angle material 1 Side reinforcement 2 Reinforcement part 2A Bolt insertion hole 3 Connection piece 3A Bolt insertion hole 4 Spacer 5 Reinforcement body 6 Connection bolt 6A Fixing nut 10 Suspension bolt 11 Fixing nut 20 Horizontal member 30 Oblique material 31 Hanging bolt 40 Insert

Claims (5)

  This is a buckling prevention tool that is attached to the suspension bolt of a suspension type support device that is constructed so that a horizontal member is suspended by a suspension bolt used as a vertical suspension member, and a supported body is horizontally supported by the horizontal member. Then, a pair of side reinforcement members respectively disposed along the opposing longitudinal side surfaces of the suspension bolt itself are formed, and the side reinforcement members are connected to each other so as to surround the suspension bolt in close contact with the side reinforcement material. A buckling prevention tool for a suspension type support device, comprising a reinforcing body and provided so that the reinforcing body prevents buckling of the suspension bolt when the suspension bolt receives an axial compressive force.   The reinforcing body is composed of the side reinforcing material and a connecting bolt for connecting the side reinforcing materials to each other, and the side reinforcing material has a L-shaped cross section and surrounds an outer surface of the suspension bolt. A connecting piece that extends from both ends of the reinforcing portion and through which a connecting bolt that connects the side reinforcing members is inserted, and the overlapping connecting pieces of the side reinforcing members are connected by connecting bolts. The buckling prevention tool for hanging type support devices according to claim 1.   In the reinforcing body, the inner surface of the side surface reinforcing material includes a plurality of spacers installed at intervals along the longitudinal direction of the side surface reinforcing material, or a spacer that is continuous along the longitudinal direction. The suspension support according to claim 1 or 2, wherein the side support members are connected to each other, and an inner diameter of the reinforcing body is configured to surround a fixing nut that is screwed to upper and lower ends of the suspension bolt. Buckling prevention device for equipment.   The reinforcing body is composed of the side surface reinforcing material and a connecting bolt that connects the side surface reinforcing materials, and the side surface reinforcing material has a U-shaped planar shape and surrounds the outer surface of the suspension bolt from three directions. A plurality of spacers installed at intervals along the longitudinal direction of the side surface reinforcing material, or spacers that are continuous along the longitudinal direction, on the inner side surface of the side surface reinforcing material, The buckling prevention tool for a suspension type support device according to claim 1, wherein the buckling prevention device is configured to be connected by a connecting bolt penetrating the combined side reinforcing materials.   In the reinforcing body, the spacer has a flat cross-sectional L shape, a V shape, a semicircular shape, and the like, and when the side reinforcing members are connected to each other, the outer surface of the suspension bolt is surrounded by the spacer. The buckling prevention tool for a suspension type support device according to claim 3 or 4 configured to be crimped.

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