JP2017197932A - Ceiling substrate structure and suspension member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling substrate structure and a suspension member offering high aseismatic performance and facilitating installation.SOLUTION: A ceiling substrate structure suspends a substrate receiving material 12 with a suspension member 20 suspended from a beam material 15, the substrate receiving material holding a lip part 11a of a ceiling substrate material 11 at a cutout part 12b. The suspension member 20 includes an upper connection jig 21 fitted on a top edge part of a suspension bolt 25 and connected to a building frame bolt 18 protruding from the beam material 15, and a lower connection jig 26 fitted on a bottom edge part of the suspension bolt 25 and connected to the substrate receiving material 12. The upper connection jig 21 has an upper connection part 22 and an upper fitting part 24 connected with a pin, the upper connection part having a building frame bolt hole through which the building frame bolt 18 is inserted, and the upper fitting part having a suspension bolt hole formed for having the top edge part of the suspension bolt 25 inserted thereinto. The building frame bolt hole has a leeway with regard to the building frame bolt 18. The building frame bolt 18 has a damping rubber 31 wound and fitted at a portion inserted into the building frame bolt hole, and a coil spring 30 is wound and fitted between the beam material 15 and the upper connection part 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ceiling base structure and a suspension member used for the ceiling base structure.

  2. Description of the Related Art Conventionally, in a building such as an office building, a suspended ceiling structure in which a hanging hanger (hanging metal fitting) is attached to a lower end portion of a hanging bolt suspended from a structural frame and a ceiling base material is supported by the hanging hanger has been adopted. However, in the Great East Japan Earthquake that occurred in March 2011, numerous suspended ceiling drop accidents occurred over a wide area. Therefore, by arranging braces in the space behind the ceiling, it is possible to reduce the shaking of the ceiling surface during an earthquake and improve the earthquake resistance of the suspended ceiling (see, for example, Patent Document 1 and Patent Document 2).

JP 2014-224445 A Japanese Patent Laying-Open No. 2015-7326

  In August 2013, the Ministry of Land, Infrastructure, Transport and Tourism promulgated a notification of technical standards related to measures against falling ceilings in buildings. In this notice, five conditions are defined as ceilings that may cause serious harm if dropped, and those that meet all these conditions are defined as “specific ceilings” and verified that the ceiling will not be damaged by a medium earthquake. It was decided that.

  However, if the above-mentioned technical standards are cleared while a new or existing specific ceiling is used as a conventional suspended ceiling, a large number of braces must be placed in the space behind the ceiling to prevent the ceiling surface from shaking during an earthquake. However, it is extremely difficult to arrange a large number of braces in the ceiling space where equipment and ducts are complicated. In addition, the labor cost required for construction will increase significantly compared to the prior art.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a ceiling base structure and a suspension member that have high earthquake resistance and are easy to construct. Note that the present invention is not limited to a specific ceiling, but is also applicable to other general ceilings.

In order to achieve the above object, a first invention includes a ceiling base material made of channel steel having a lip portion, a base receiving material for holding the lip portion of the ceiling base material by a notch, and a suspension from a structural housing A ceiling foundation structure comprising a suspension member for holding the foundation receiving material,
The suspension member is attached to a suspension bolt, an upper connection jig that is attached to an upper end portion of the suspension bolt, and is connected to a housing bolt that protrudes from the structural housing, and is attached to a lower end portion of the suspension bolt. A lower connecting jig connected to the material,
The upper connecting jig includes an upper connecting portion in which a housing bolt hole through which the housing bolt is inserted is formed in an upper end portion, and an upper mounting portion in which a suspension bolt hole through which the upper end portion of the suspension bolt is inserted is formed in a lower end portion. A lower end portion of the upper connecting portion and an upper end portion of the upper mounting portion are pin-joined, and the upper connecting portion and the upper mounting portion are rotatable in vertical planes orthogonal to each other,
The housing bolt hole formed in the upper end portion of the upper connecting portion has an inner diameter having play with respect to the housing bolt, and the housing bolt is provided with a vibration-proof rubber at a portion through which the housing bolt hole is inserted, and a nut. And a coil spring is wound between the structural housing and the upper connecting portion.

The second invention is a suspension member for suspending a base receiving material for holding a lip portion of a ceiling base material made of channel steel having a lip portion by a notch portion,
A suspension bolt, an upper connecting jig that is attached to the upper end portion of the suspension bolt and is connected to the housing bolt protruding from the structural housing, and a lower portion that is attached to the lower end portion of the suspension bolt and is connected to the base receiving material A connecting jig,
The upper connecting jig includes an upper connecting portion in which a housing bolt hole through which the housing bolt is inserted is formed in an upper end portion, and an upper mounting portion in which a suspension bolt hole through which the upper end portion of the suspension bolt is inserted is formed in a lower end portion. A lower end portion of the upper connecting portion and an upper end portion of the upper mounting portion are pin-joined, and the upper connecting portion and the upper mounting portion are rotatable in vertical planes orthogonal to each other,
The housing bolt hole formed in the upper end portion of the upper connecting portion has an inner diameter having play with respect to the housing bolt, and the housing bolt is provided with a vibration-proof rubber at a portion through which the housing bolt hole is inserted, and a nut. And a coil spring is wound between the structural housing and the upper connecting portion.

  In the first and second inventions, the housing bolt hole of the upper connecting jig constituting the suspension member has an inner diameter having play with respect to the housing bolt. The vibration when the suspension member is rotated with respect to the housing bolt is absorbed by the anti-vibration rubber and the coil spring attached to the housing bolt. In addition, in the first and second inventions, since the upper connecting portion and the upper mounting portion constituting the upper connecting jig are rotatable within a vertical plane orthogonal to each other, the suspension bolt is in two horizontal directions. Has a degree of freedom. With the above configuration, the acceleration transmitted from the structural housing to the suspension bolt via the housing bolt is reduced, and the shaking of the ceiling surface can be significantly suppressed.

In the first and second inventions, the lower connecting jig includes a lower mounting portion in which a suspension bolt hole into which the lower end portion of the suspension bolt is inserted is formed in the upper end portion, and a lower end portion in the base receiving material. A lower connecting portion connected, and a lower end portion of the lower mounting portion and an upper end portion of the lower connecting portion are connected by a connecting bolt,
The connection bolt hole formed in the upper end portion of the lower connection portion has an inner diameter having play with respect to the connection bolt, and the connection bolt is provided with a vibration-proof rubber at a portion through which the connection bolt hole is inserted. The coil spring is preferably wound between the lower mounting portion and the lower connecting portion.

  In this configuration, since the connecting bolt hole of the lower connecting portion constituting the lower connecting jig has an inner diameter having play with respect to the connecting bolt, the lower connecting portion rotates within an arbitrary vertical plane with respect to the connecting bolt. The vibration when the lower connecting portion rotates with respect to the connecting bolt can be absorbed by the anti-vibration rubber and the coil spring attached to the connecting bolt. With the above configuration, acceleration transmitted from the suspension bolt to the ceiling base material can be reduced.

  In the first and second inventions, the upper end of the suspension bolt inserted through the suspension bolt hole formed in the upper mounting portion of the upper connecting jig and the lower mounting portion of the lower connecting jig are formed. It is preferable that anti-vibration rubber is respectively attached to the lower end portion of the suspension bolt that is inserted through the suspension bolt hole and fixed with a nut.

  In the said structure, since the anti-vibration rubber is interposed in the junction part of a suspension bolt and an upper connection jig, and the junction part of a suspension bolt and a lower connection jig, respectively, the vibration of a suspension bolt is vibration-proof rubber. Can be absorbed.

  In the first invention, a leaf spring protruding from the ground receiving material toward the wall surface is installed on the ground receiving material facing the wall surface of the structure, and a distal end portion of the leaf spring is in a vertical plane. It is preferable that it is curved.

  In the said structure, when a ceiling surface shakes in a horizontal direction, the leaf | plate spring which protrudes from a base receiving material toward the wall surface of a structure becomes a buffer material with respect to a wall surface, and eases the horizontal vibration of a ceiling surface.

  In the present invention, since the housing bolt hole of the upper connecting jig constituting the suspension member has an inner diameter having play with respect to the housing bolt, the suspension member rotates in an arbitrary vertical plane with respect to the housing bolt. The vibration when the suspension member rotates with respect to the housing bolt is absorbed by the anti-vibration rubber and the coil spring attached to the housing bolt. In addition, since the upper connecting portion and the upper mounting portion that constitute the upper connecting jig are rotatable within a vertical plane orthogonal to each other, the suspension bolt has a degree of freedom in two horizontal directions. Thereby, the acceleration transmitted from the structural housing to the suspension bolt via the housing bolt is reduced, and the ceiling foundation structure according to the present invention can exhibit high earthquake resistance. Moreover, since the suspension member which uses a suspension bolt as a component is used, construction is also easy.

1 is a perspective view of a ceiling foundation structure according to an embodiment of the present invention. It is the perspective view which expanded the corner part of the ceiling base structure. (A) is an elevation view (partial cross-sectional view) of the upper part of the suspension member as seen from the direction of the beam axis of the beam, and (B) is an elevation of the upper part of the suspension member as seen from the direction perpendicular to the beam axis of the beam. It is a surface view (partial sectional view). (A) is an elevational view (partial cross-sectional view) of the lower part of the suspension member as seen from the material axis direction of the base receiving material, and (B) is a view of the lower part of the suspension member from the direction perpendicular to the material axis of the base receiving material It is an elevation (partial sectional view). It is explanatory drawing which showed the fall prevention measure of a ceiling base material.

  Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

A ceiling foundation structure 10 according to an embodiment of the present invention is shown in FIGS.
The ceiling foundation structure 10 according to the present embodiment is arranged in parallel in one direction, the ceiling foundation material 11 to which the ceiling board 13 is screwed, and the ceiling foundation material 11 arranged in parallel in a direction orthogonal to the ceiling foundation material 11. And a plurality of suspension members 20 that are suspended from a beam member 15 (an example of a structural housing) and retain the foundation receiving material 12. In addition, a leaf spring 35 serving as a cushioning material is installed on the base receiving material 12 facing the wall surface 14 of the structure when the peripheral edge of the ceiling collides with the wall surface 14.

  For the ceiling base material 11, a grooved steel having a lip portion 11a is used (see FIG. 2). The lip portion 11a of the ceiling base material 11 is formed in an inverted U shape in which the flange tip portion of the ceiling base material 11 is bent inward (web side). The ceiling base material 11 is arranged so that the front ends of both flanges are up and the web is down, and the ceiling board 13 is screwed to the lower surface of the web.

  On the other hand, both flanges of the base receiving material 12 have a shape in which inverted trapezoidal protrusions 12a are arranged adjacent to each other in the material length direction, and a notch 12b that hooks and holds the lip portion 11a of the ceiling base material 11 is provided. It is formed on both sides of each projection 12a (see FIG. 2). The protrusion 12a has a width of about 20 mm and a height of about 10 mm. Further, a plurality of insertion holes 12c through which the split pins 34 are inserted are formed in both flanges of the base receiving material 12 with a certain interval in the material length direction.

  The suspending member 20 includes a suspending bolt 25 made of a cut bolt, an upper connecting jig 21 that is attached to an upper end portion of the suspending bolt 25 and is connected to a frame bolt 18 that protrudes downward from the beam member 15, and a suspending bolt 25. And a lower connecting jig 26 connected to the base receiving material 12. 3A and 3B show details of the upper part of the suspension member 20, and FIGS. 4A and 4B show details of the lower part of the suspension member 20, respectively.

The beam member 15 in the present embodiment is a lip groove steel, and a joining jig 16 to which a housing bolt 18 is attached is fixed to the lower flange with screws 19 (see FIG. 3A). The joining jig 16 includes a sandwiching portion 17 that is joined to the lower flange while sandwiching the lower flange of the beam member 15, and a frame bolt 18 that projects from the sandwiching portion 17.
The sandwiching portion 17 is made of a band plate material, and both end portions in the long side direction are bent at right angles to one surface side (see FIG. 3A). Further, one end portion of the sandwiching portion 17 is bent inward to have an inverted V shape, and is a hook portion that is hooked on the lip portion of the lower flange of the beam member 15. A screw hole (not shown) through which the screw 19 is inserted is formed at the other end. In addition, a head portion of the housing bolt 18 protruding to the other surface side is fixed to an intermediate portion of the sandwiching portion 17.

  The upper connecting jig 21 has an upper connecting portion 22 in which a housing bolt hole 22a through which the housing bolt 18 is inserted is formed at the upper end portion, and a suspension bolt hole (not shown) through which the upper end portion of the hanging bolt 25 is inserted in the lower end portion. The upper mounting portion 24 is formed, and a pin joint portion 23 that pin-joins the lower end portion of the upper connecting portion 22 and the upper end portion of the upper mounting portion 24 is provided.

The upper connecting portion 22 is made of a band plate material folded in a U-shape, the long side direction middle portion of the band plate material is the upper end portion of the upper connecting portion 22, and both long side direction end portions of the band plate material are the lower ends of the upper connecting portion 22. Part. The housing bolt hole 22 a formed in the upper end portion of the upper connecting portion 22 has an inner diameter having play with respect to the housing bolt 18. Thereby, the suspension member 20 is rotatable with respect to the frame bolt 18 in an arbitrary vertical plane.
In the present embodiment, the inner diameter of the housing bolt hole 22a is about 1.2 to 1.5 times the outer diameter of the housing bolt 18.

  A cylindrical anti-vibration rubber 31 is attached to the housing bolt 18 inserted through the housing bolt hole 22a, and is fixed to the upper connecting portion 22 by a nut 33 and a washer 32. In addition, a coil spring 30 having a truncated cone shape having a lower diameter larger than an upper diameter is wound around the housing bolt 18 between the beam member 15 and the upper connecting portion 22.

  The upper mounting portion 24 is made of a band plate material folded in a U-shape, and both ends in the long side direction of the band plate material are upper ends of the upper mounting portion 24, and the middle portion in the long side direction of the band plate material is the lower end of the upper mounting portion 24 Part.

  The pin joint portion 23 is made of a plate material cut into a cross shape, and both end portions in one direction are bent upward at a right angle, and are pin-joined by the lower end portion of the upper connecting portion 22 and the split pin 34, and both end portions in the other direction. Is bent at a right angle downward and is pin-connected to the upper end portion of the upper mounting portion 24 by a split pin 34. Thereby, the upper connection part 22 and the upper mounting part 24 are rotatable within vertical planes orthogonal to each other.

  On the other hand, the lower connecting jig 26 includes a lower mounting portion 27 in which a suspension bolt hole (not shown) through which the lower end portion of the suspension bolt 25 is inserted is formed in the upper end portion, and a lower portion in which the lower end portion is connected to the base receiving material 12. The lower mounting part 27 and the lower connection part 28 are connected to each other by a connection bolt 29.

  The lower mounting portion 27 includes an upper member 27u in which a suspension bolt hole (not shown) through which the lower end of the suspension bolt 25 is inserted is formed at the upper end, and a connection bolt hole (not shown) through which the upper end of the connection bolt 29 is inserted. Consists of a lower member 27d formed at the lower end, and the lower end of the upper member 27u and the upper end of the lower member 27d are pin-joined by a split pin 34. Thereby, the upper member 27u and the lower member 27d can be rotated in the vertical plane.

The lower connecting portion 28 is made of a band plate material folded in a U-shape, the middle portion in the long side direction of the band plate material is the upper end portion of the lower connecting portion 28, and both end portions in the long side direction of the band plate material are the lower ends of the lower connecting portion 28. Part. A connecting bolt hole 28 a having an inner diameter with respect to the connecting bolt 29 is formed at the upper end of the lower connecting portion 28. Thereby, the lower connection part 28 is rotatable with respect to the connection bolt 29 in an arbitrary vertical plane.
In the present embodiment, the inner diameter of the connecting bolt hole 28 a is about 1.2 to 1.5 times the outer diameter of the connecting bolt 29.

  A cylindrical anti-vibration rubber 31 is attached to the connection bolt 29 inserted through the connection bolt hole 28 a, and is fixed to the lower connection portion 28 with a nut 33 and a washer 32. A coil spring 30 having a truncated cone shape having a lower diameter larger than the upper diameter is wound around the connection bolt 29 between the lower mounting portion 27 and the lower connection portion 28.

  An insertion hole (not shown) through which the split pin 34 is inserted is formed at the lower end portion of the lower connecting portion 28, and the lower end portion of the lower connecting portion 28 and the base receiving material 12 are the lower end portion of the lower connecting portion 28. Are connected by split pins 34 through which the insertion holes formed in the through hole 12c and the insertion holes 12c formed in the flange of the base receiving material 12 are inserted. Thereby, the lower connection part 28 and the foundation | substrate receiving material 12 can be mutually rotated within a vertical plane.

  The upper end portion of the suspension bolt 25 inserted through the suspension bolt hole formed in the upper mounting portion 24 of the upper connection jig 21 and the suspension bolt inserted through the suspension bolt hole formed in the lower attachment portion 27 of the lower connection jig 26. Cylindrical anti-vibration rubbers 31 are attached to the lower end portions of 25, and are fixed to the upper mounting portion 24 or the lower mounting portion 27 with nuts 33 and washers 32.

  The leaf spring 35 is shaped like a strip, and one end in the long side direction is fixed to the web of the base receiving material 12. The other end of the leaf spring 35 protrudes from the base receiving material 12 toward the wall surface 14 and has a shape curved in an arc shape. When the ceiling surface shakes, the curved portion of the leaf spring 35 collides with the wall surface 14 and absorbs the shaking of the ceiling surface.

According to the present invention, it is considered that the possibility of the ceiling base material 11 falling off from the base support material 12 due to the shaking of the earthquake is very low. However, for further safety, a countermeasure as shown in FIG. .
In this measure, the ceiling base material 11 is fixed to the base receiving material 12 using the fall prevention member 36.
As shown in FIG. 5, the fall prevention member 36 is formed by bending a rectangular flat plate material into a U shape, and the width between the flange-like side portions 36 a is substantially the same as the width of the base receiving material 12. Has been. A cutout portion 36b into which the ceiling base material 11 is fitted is formed on both side portions 36a of the fall prevention member 36, and insertion holes 36c through which the split pins 34 are inserted are formed on both sides of the cutout portion 36b. The position of the insertion hole 36 c of the fall prevention member 36 corresponds to the position of the insertion hole 12 c of the base receiving material 12.

  When the ceiling base material 11 is fixed to the base receiving material 12 using the fall prevention member 36, the ceiling base material 11 is fitted into the notch 36b of the fall prevention member 36, and the insertion hole 36c of the fall prevention member 36 and the base The split pin 34 is inserted into the insertion hole 12 c of the receiving material 12, and the fall prevention member 36 is fixed to the base receiving material 12.

A vibration test carried out to verify the earthquake resistance effect of the present invention will be described.
A seismic vehicle was used for the vibration test. The specifications of the used earthquake wheel are as follows.
-Earthquake room: 2.8m wide x 1.8m deep x 1.9m high
・ Maximum vibration displacement: ± 300 mm in the width direction, ± 100 mm in the depth direction, ± 50 mm in the vertical direction
・ Input seismic wave: Hanshin Awaji and others

In the vibration test, a simple structure was installed in the seismic chamber, and the suspension member was suspended from the beam material laid between the opposing walls of the simple structure, and the above-described ceiling foundation structure was constructed. The specifications of the ceiling foundation structure in the vibration test are as follows.
Length of suspension member: 800mm
Suspension member width direction interval: 1100mm
Distance in the depth direction of the suspension member: 750 mm

  In the vibration test, an excitation test with a seismic intensity of 7 and a combined seismic intensity test with a seismic intensity of 4 to 7 were carried out. In either test, the ceiling did not fall, and the high earthquake resistance of the ceiling foundation structure according to the present invention was confirmed. .

  Although one embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and is within the scope of matters described in the claims. Other possible embodiments and modifications are also included. For example, in the above embodiment, the structural frame is a beam material, but it goes without saying that it may be a concrete slab or the like.

10: Ceiling base structure, 11: Ceiling base material, 11a: Lip part, 12: Base receiving material, 12a: Projection part, 12b: Notch part, 12c: Insertion hole, 13: Ceiling board, 14: Wall surface, 15: Beam Material (structural housing), 16: joining jig, 17: clamping portion, 18: housing bolt, 19: screw, 20: suspension member, 21: upper connecting jig, 22: upper connecting portion, 22a: housing bolt hole, 23: Pin joint portion, 24: Upper mounting portion, 25: Hanging bolt, 26: Lower connecting jig, 27: Lower mounting portion, 27u: Upper member, 27d: Lower member, 28: Lower connecting portion, 28a: Connecting bolt Hole: 29: Connection bolt, 30: Coil spring, 31: Anti-vibration rubber, 32: Washer, 33: Nut, 34: Split pin, 35: Leaf spring, 36: Fall prevention member, 36a: Side, 36b: Notch , 36c: insertion hole

Claims (7)

A ceiling base material made of channel steel having a lip portion, a base receiving material that holds the lip portion of the ceiling base material at a notch, and a suspension member that is suspended from a structural housing and holds the base receiving material. A ceiling base structure,
The suspension member is attached to a suspension bolt, an upper connection jig that is attached to an upper end portion of the suspension bolt, and is connected to a housing bolt that protrudes from the structural housing, and is attached to a lower end portion of the suspension bolt. A lower connecting jig connected to the material,
The upper connecting jig includes an upper connecting portion in which a housing bolt hole through which the housing bolt is inserted is formed in an upper end portion, and an upper mounting portion in which a suspension bolt hole through which the upper end portion of the suspension bolt is inserted is formed in a lower end portion. A lower end portion of the upper connecting portion and an upper end portion of the upper mounting portion are pin-joined, and the upper connecting portion and the upper mounting portion are rotatable in vertical planes orthogonal to each other,
The housing bolt hole formed in the upper end portion of the upper connecting portion has an inner diameter having play with respect to the housing bolt, and the housing bolt is provided with a vibration-proof rubber at a portion through which the housing bolt hole is inserted, and a nut. And a coil spring is wound between the structural housing and the upper connecting portion. 2. The ceiling base structure according to claim 1, wherein the lower connecting jig includes a lower mounting portion in which a suspension bolt hole through which a lower end portion of the suspension bolt is inserted is formed at an upper end portion, and a lower end portion connected to the base support material. A lower connecting portion, and a lower end portion of the lower mounting portion and an upper end portion of the lower connecting portion are connected by a connecting bolt,
The connection bolt hole formed in the upper end portion of the lower connection portion has an inner diameter having play with respect to the connection bolt, and the connection bolt is provided with a vibration-proof rubber at a portion through which the connection bolt hole is inserted. And a coil spring is wound between the lower mounting portion and the lower connecting portion.   3. The ceiling foundation structure according to claim 1 or 2, wherein an upper end portion of the suspension bolt inserted through a suspension bolt hole formed in an upper mounting portion of the upper connecting jig and a lower mounting portion of the lower connecting jig are formed. A ceiling foundation structure, wherein a vibration-proof rubber is attached to each lower end portion of the suspension bolt inserted through the suspended suspension bolt hole and fixed with a nut.   In the ceiling foundation structure according to any one of claims 1 to 3, a leaf spring protruding from the foundation receiving material toward the wall surface is installed on the foundation receiving material facing the wall surface of the structure, A ceiling foundation structure characterized in that a tip of a leaf spring is curved in a vertical plane. A suspension member for suspending a base receiving material for holding a lip portion of a ceiling base material made of channel steel having a lip portion by a notch,
A suspension bolt, an upper connecting jig that is attached to the upper end portion of the suspension bolt and is connected to the housing bolt protruding from the structural housing, and a lower portion that is attached to the lower end portion of the suspension bolt and is connected to the base receiving material A connecting jig,
The upper connecting jig includes an upper connecting portion in which a housing bolt hole through which the housing bolt is inserted is formed in an upper end portion, and an upper mounting portion in which a suspension bolt hole through which the upper end portion of the suspension bolt is inserted is formed in a lower end portion. A lower end portion of the upper connecting portion and an upper end portion of the upper mounting portion are pin-joined, and the upper connecting portion and the upper mounting portion are rotatable in vertical planes orthogonal to each other,
The housing bolt hole formed in the upper end portion of the upper connecting portion has an inner diameter having play with respect to the housing bolt, and the housing bolt is provided with a vibration-proof rubber at a portion through which the housing bolt hole is inserted, and a nut. And a coil spring wound between the structural housing and the upper connecting portion. 6. The suspension member according to claim 5, wherein the lower connection jig includes a lower mounting portion in which a suspension bolt hole into which a lower end portion of the suspension bolt is inserted is formed at an upper end portion, and a lower end portion connected to the base receiving material. A lower connecting portion, and a lower end portion of the lower mounting portion and an upper end portion of the lower connecting portion are connected by a connecting bolt,
The connection bolt hole formed in the upper end portion of the lower connection portion has an inner diameter having play with respect to the connection bolt, and the connection bolt is provided with a vibration-proof rubber at a portion through which the connection bolt hole is inserted. And a coil spring wound around the lower mounting portion and the lower connecting portion.   The suspension member according to claim 5 or 6, wherein the suspension member is formed at an upper end portion of the suspension bolt that is inserted through a suspension bolt hole formed in an upper mounting portion of the upper connection jig and a lower mounting portion of the lower connection jig. A suspension member, wherein a vibration-proof rubber is attached to each lower end portion of the suspension bolt inserted through the suspension bolt hole and fixed with a nut.

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