JP7224784B2 - Anti-vibration mounting structure for joists - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vibration isolation mounting structure for joists.

2. Description of the Related Art Conventionally, there has been known a mounting structure in which a joist is attached to a surrounding material (framework) in a vibration-isolating state in a building. For example, in Patent Document 1, a base metal fitting that is connected to the side surface of a frame, a joist metal fitting that is provided on the upper side of the base metal fitting and receives the end of the joist, and a rubber elastic body that connects the base metal fitting and the joist metal fitting. A mounting structure using an anti-vibration mounting bracket is disclosed.

JP 2018-3561 A

However, in the conventional anti-vibration mounting bracket of Patent Document 1, the joist bracket, which is a member for receiving the joist, is a separate member independent from the base metal fitting connected to the side surface of the building frame, and has rubber elasticity for vibration isolation. Since the joists are indirectly attached to the frame by connecting the two members together, the structure is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to provide a vibration-damping mounting structure for joists that is simple in construction.

In order to achieve the above object, the present invention provides a vibration isolator having an inner cylindrical portion connected to a joist in a fitting hole of a joist receiving member and a rubber elastic portion provided on the outer peripheral surface of the inner cylindrical portion. It was configured by fitting the members together.

Specifically, a first invention is a joist anti-vibration mounting structure for attaching a joist to a building frame, comprising a joist connecting portion formed with a fitting hole and connected to the joist, a joist receiving member for receiving the joist; and a vibration isolating member fitted into the fitting hole, wherein the vibration isolating member is a connection for connecting the joist connecting portion to the joist. It is characterized by having an inner cylindrical portion through which a member is inserted, and a rubber elastic portion provided on the outer peripheral surface of the inner cylindrical portion.

In the first invention, since the joist receiving member that receives the joist is connected to the side surface of the frame, compared to the case where the member that receives the joist and the member that is connected to the side surface of the frame are separate members, Easy to configure. In addition, since the vibration isolating member has an inner cylindrical portion that is fitted into the fitting hole of the joist receiving member and is connected to the joist, and a rubber elastic portion provided on the outer peripheral surface of the inner cylindrical portion, the joist receiving member can be , the joist can be attached to the building frame with anti-vibration support. Therefore, according to the first invention, it is possible to obtain a simply constructed anti-vibration mounting structure for joists.

A second invention is a joist anti-vibration mounting structure for attaching a joist to a building frame, comprising a frame connecting portion formed with a fitting hole and connected to a side surface of the building frame, connected to the joist, A joist receiving member for receiving the joists and a vibration isolating member fitted in the fitting hole are provided, and the vibration isolating member is inserted with a connecting member for connecting the frame connecting portion to the frame. and a rubber elastic portion provided on the outer peripheral surface of the inner cylindrical portion.

In the second invention, since the joist receiving members for receiving the joists are connected to the side surfaces of the frame, the structure is simple as in the first invention. Further, since the vibration isolating member has an inner cylindrical portion that is fitted into the fitting hole of the joist receiving member and is connected to the frame and a rubber elastic portion provided on the outer peripheral surface of the inner cylindrical portion, the joist receiving member , the joists can be attached to the frame while being connected to the frame in a vibration-isolated state. Therefore, according to the second invention, a vibration-isolating mounting structure for joists having a simple configuration can be obtained.

A third aspect of the invention is a joist anti-vibration mounting structure for attaching a joist to a building frame, comprising a joist connecting portion formed with an insertion hole and connected to the joist, connected to a side surface of the building frame, a joist receiving member for receiving a joist; and a vibration isolating member embedded in a portion of the joist corresponding to the insertion hole. It is characterized by having an inner cylindrical portion through which a connecting member for connecting to a joist is inserted, and a rubber elastic portion provided on the outer peripheral surface of the inner cylindrical portion.

In the third invention, the joist receiving members for receiving the joists are connected to the side surfaces of the frame, so the configuration is simple as in the first and second inventions. The vibration-isolating member includes an inner cylindrical portion embedded in the joist, through which a connection member for connecting the joist connecting portion to the joist is inserted, which is inserted through the insertion hole of the joist receiving member, and an outer circumference of the inner cylindrical portion. Since the joist receiving member has the rubber elastic body provided on the surface, the joist receiving member can be attached to the building frame while supporting the joist in an anti-vibration manner. Therefore, according to the third aspect of the present invention, it is possible to obtain a simply constructed anti-vibration mounting structure for joists.

In a fourth aspect based on the third aspect, the vibration-damping member further has an outer tubular portion provided around the inner tubular portion, and the rubber elastic portion comprises the inner tubular portion and the outer tubular portion. It is characterized in that it is provided between the part and connects both parts to each other.

According to the fourth invention, the vibration isolating member has the outer tubular portion, and the rubber elastic portion is provided between the inner tubular portion and the outer tubular portion. The anti-vibration mounting structure can be easily assembled.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the joist receiving members are provided on both outer sides of the joist in the width direction so as to face each other in the width direction of the joist. a pair of joist connecting parts connected to each other; a receiving part for connecting the lower ends of both the joist connecting parts to each other and receiving the joists; and a pair of linking parts for the frame, which are provided so as to extend outward in the width direction of the frame and are connected to the side surfaces of the frame.

According to the fifth aspect of the invention, the joist receiving member is connected to the joist by a pair of joist connecting portions provided on both laterally opposite sides of the joist so as to face each other in the width direction. Since the joists are received by the receiving portions that connect the lower ends of the joists to each other, the joists can be stably attached to the frame.

According to a sixth invention, in the fifth invention, a rubber elastic body is provided between the lower surface of the joist and the receiving portion.

According to the sixth aspect of the invention, since the rubber elastic body is provided between the lower surface of the joist and the receiving portion, the vibration isolation effect can be further enhanced.

As described above, according to the present invention, it is possible to obtain a simply constructed anti-vibration mounting structure for joists.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a vibration-proof mounting structure for joists according to Embodiment 1 of the present invention; 1 is a vertical cross-sectional view of the anti-vibration mounting structure for a joist according to Embodiment 1, viewed from the front-rear direction; FIG. FIG. 2 is a vertical cross-sectional view of the anti-vibration mounting structure for joists according to Embodiment 1, viewed from the left-right direction. FIG. 1 is a view equivalent to FIG. 1 of a vibration-damping mounting structure for joists according to Embodiment 2; 3 equivalent view of the anti-vibration mounting structure for joists according to Embodiment 2. FIG. 1 equivalent view of the anti-vibration mounting structure for joists according to Embodiment 3. FIG. 2 equivalent view of the anti-vibration mounting structure for joists according to Embodiment 3. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its applications or uses.

(Embodiment 1)
－Anti-vibration mounting structure for joists－
FIG. 1 shows a vibration-damping mounting structure S for joists according to Embodiment 1 of the present invention.

The anti-vibration mounting structure S for joists according to the present embodiment is, for example, in the ceiling of a building such as a two-story house built by a framework construction method (2×4 construction method), where the joist 2 is in a vibration-isolated state with respect to the frame 1. It is a structure to be attached. The anti-vibration mounting structure S for joists includes a frame 1 arranged between a first floor portion and a second floor portion of a building, a plurality of joists 2, 2, . . . member 3; In the following description, the width direction of the joist 2 may be referred to as the left-right direction, the longitudinal direction of the joist 2 toward the skeleton 1 may be referred to as the front-rear direction, and the opposite side of the joist 2 may be referred to as the front-rear direction rear. be.

2 and 3 show cross sections of the anti-vibration mounting structure S for joists. The mounting member 3 includes a joist receiving member 4 and a vibration isolating member 5 .

-Joist receiving member-
The joist receiving member 4 is connected to the side surface of the frame 1 and is for receiving the joist 2 . As shown in FIGS. 2 and 3, the joist receiving member 4 has a U-shaped cross section opening upward, and is a metal fitting manufactured by press forming a metal plate material such as an iron plate.

The joist receiving member 4 includes a pair of left and right joist connecting portions 41, 41 which are provided on both widthwise outer sides (laterally outer sides) of the joist 2 so as to face each other in the width direction and are connected to the side surfaces of the joist 2. , a receiving portion 42 that connects the lower ends of the two joist connecting portions 41, 41 to each other and receives the joist 2, and a width direction of the joist 2 at the end (front end) of each joist connecting portion 41 on the building 1 side. It has a pair of right and left skeleton connection parts 43 , 43 which are provided so as to extend outward (outward in the left-right direction) and which are fixed to the side surfaces of the skeleton 1 . These joist connecting portions 41, 41, receiving portion 42, and frame connecting portions 43, 43 are formed integrally with each other.

The joist connecting portions 41, 41 are fixed parallel to each other. The joist connecting portions 41, 41 are formed in a rectangular shape. Two fitting holes 41a, 41a into which the later-described vibration isolating members 5 are fitted are vertically aligned and formed through the substantially central portion in the width direction (front-rear direction) of each joist connecting portion 41. As shown in FIG.

The receiving portion 42 is formed in a rectangular shape. A rubber elastic body 42 a is provided between the receiving portion 42 and the lower surface of the joist 2 . The rubber elastic body 42a is adhesively fixed to the upper surface of the receiving portion 42. As shown in FIG. As a result, the receiving portion 42 receives the joist 2 while the rubber elastic body 42 a is in contact with the joist 2 . A plurality of grooves (not shown) are formed in the rubber elastic body 42a, and these grooves make the rubber elastic body 42a as a whole soft (easy to bend).

Each skeleton joint 43 is perpendicular to the corresponding joist joint 41 . Each linking portion 43 for a skeleton is formed in a rectangular shape. Three screw insertion holes 43a, 43a, and 43a are vertically aligned and formed through the central portion of each skeleton connecting portion 43 in the width direction (horizontal direction). The joist receiving member 4 is fixed by inserting a skeleton screw V1 (connecting member) into each screw insertion hole 43a and screwing the skeleton screw V1 into the skeleton 1 for fastening.

- Anti-vibration material -
The vibration isolating member 5 is for connecting the joist receiving member 4 to the joist 2 . The vibration isolating member 5 is fitted and fixed in the fitting holes 41a of the joist connecting portions 41, 41 of the joist receiving member 4. As shown in FIG.

The vibration isolating member 5 includes a cylindrical metal inner cylindrical portion 51 through which a joist screw V2 (connecting member) for connecting the joist connecting portions 41, 41 to the joist 2 is inserted, and the inner cylindrical portion 51. and a cylindrical rubber elastic portion 52 provided on the outer peripheral surface. The rubber elastic portion 52 is formed integrally with the inner tubular portion 51 so as to cover the outer peripheral surface of the inner tubular portion 51 .

Each rubber elastic portion 52 includes a cylindrical main body portion 52a, a circular brim-shaped first extension portion 52b extending radially outward from the end portion of the main body portion 52a on the joist 2 side, and the main body portion 52a. It has a circular brim-shaped second extension 52c extending radially outward at the end opposite to the joists 2 .

The outer diameter of the body portion 52a is smaller than the hole diameter of the fitting hole 41a. The outer diameters of the first extending portion 52b and the second extending portion 52c are each larger than the hole diameter of the fitting hole 41a. The outer diameter of the second extending portion 52c is larger than the outer diameter of the first extending portion 52b. The first extending portion 52b is formed in a tapered shape so that the outer diameter thereof gradually decreases toward the joist 2 side.

The body portion 52a of each rubber elastic portion 52 is inserted into the fitting hole 41a with the first extending portion 52b and the second extending portion 52c sandwiching the periphery of the fitting hole 41a.

. . are fitted into the fitting holes 41a and fixed to the joist 2, the left and right joist screws V2, V2 are arranged so that they do not collide with each other inside the joist 2. The fitting holes 41a, 41a, .

(effect)
As described above, according to this embodiment, since the joist receiving member 4 that receives the joist 2 is connected to the side surface of the frame 1, the member that receives the joist 2 and the member that is connected to the side surface of the frame 1 are independent members. The configuration is simple compared to the case of . The vibration isolating member 5 is fitted into the fitting hole 41a of the joist receiving member 4, and comprises an inner cylindrical portion 51 fixed to the joist 2 and a rubber elastic portion 52 provided on the outer peripheral surface of the inner cylindrical portion 51. Therefore, the joist receiving member 4 can be attached to the frame 1 while supporting the joist 2 in a vibration-proof manner. Therefore, the anti-vibration mounting structure S for joists having a simple configuration can be obtained.

In addition, the joist receiving member 4 connects the joist 2 with a pair of joist connecting portions 41, 41 provided on both lateral sides of the joist 2 so as to face each other in the width direction. , 41 are connected to each other to receive the joist 2, the joist 2 can be stably attached to the frame 1. - 特許庁

In addition, since the rubber elastic body 42a is provided between the lower surface of the joist 2 and the receiving portion 42, the vibration isolation effect can be further enhanced.

(Embodiment 2)
This embodiment differs from the first embodiment in the configuration of the joist connecting portions 41, 41 and the frame connecting portions 43, 43 of the joist receiving member 4 and the arrangement position of the vibration isolating member 5. , which are the same as those of the first embodiment. In the following description, redundant description of components similar to those of the first embodiment may be omitted.

FIG. 4 shows the anti-vibration mounting structure S for joists according to this embodiment.

Two screw insertion holes 41b, 41b are vertically aligned and penetrated through each joist connecting portion 41 at substantially the center portion thereof in the width direction (front-rear direction). The joist receiving member 4 is fixed by inserting the joist screw V2 into each of the screw insertion holes 41b and screwing the joist screw V2 into the side surface of the joist 2 for fastening.

FIG. 5 shows a cross section of the anti-vibration mounting structure S for joists.

Two fitting holes 43b, 43b for fitting the anti-vibration member 5 are vertically aligned and penetratingly formed in the central portion in the width direction (horizontal direction) of each frame connecting portion 43. As shown in FIG.

The vibration isolating member 5 is for connecting the joist receiving member 4 to the frame 1 . The vibration isolating member 5 is fitted and fixed in each fitting hole 43b of the connecting portions 43, 43 for the building frame of the joist receiving member 4. As shown in FIG.

Each rubber elastic portion 52 includes a cylindrical main body portion 52a, a circular brim-shaped first extension portion 52b extending radially outward from the end portion of the main body portion 52a on the side of the skeleton 1, and the main body portion 52a. It has a circular brim-shaped second extension 52c extending radially outward at the end on the side opposite to the frame 1 .

The outer diameter of the body portion 52a is smaller than the hole diameter of the fitting hole 43b. The outer diameters of the first extending portion 52b and the second extending portion 52c are each larger than the hole diameter of the fitting hole 43b. The outer diameter of the second extending portion 52c is larger than the outer diameter of the first extending portion 52b. The first extending portion 52b is formed in a tapered shape so that the outer diameter thereof gradually decreases toward the skeleton 1 side.

The body portion 52a of each rubber elastic portion 52 is inserted through the fitting hole 43b in a state in which the peripheral portion of the fitting hole 43b is sandwiched between the first extending portion 52b and the second extending portion 52c.

(effect)
As described above, according to the present embodiment, since the joist receiving members 4 for receiving the joists 2 are connected to the side surfaces of the frame 1, the configuration is simple as in the first embodiment. The vibration isolating member 5 is fitted in the fitting hole 43b of the joist receiving member 4, and includes an inner cylindrical portion 51 fixed to the frame 1 and a rubber elastic portion 52 provided on the outer peripheral surface of the inner cylindrical portion 51. , the joist receiving member 4 can attach the joist 2 to the frame 1 while being connected to the frame 1 in a vibration-isolating state. Therefore, the anti-vibration mounting structure S for joists having a simple configuration can be obtained.

(Embodiment 3)
This embodiment differs from the first embodiment in the configuration of the joist 2, the joist connecting portions 41, 41 of the joist receiving member 4, the vibration isolating member 5, and the arrangement position of the vibration isolating member 5. , which are the same as those of the first embodiment. In the following description, redundant description of components similar to those of the first embodiment may be omitted.

FIG. 6 shows a vibration isolation mounting structure S for joists according to Embodiment 3 of the present invention. FIG. 7 shows a cross section of the anti-vibration mounting structure S for joists.

An insertion hole 41c for inserting a hexagon bolt described later is formed through an approximately central portion of each joist connecting portion 41. As shown in FIG.

The vibration isolating member 5 is embedded in a portion of the joist 2 corresponding to the insertion hole 41 c of the joist receiving member 4 . That is, a through hole 2a into which the anti-vibration member 5 is inserted is formed through the joist 2 in its width direction (horizontal direction) in a portion corresponding to the insertion hole 41c. The through holes 2a are formed to open at substantially the same positions as the insertion holes 41c, 41c of the joist connecting portions 41, 41 on both side surfaces of the joist 2. As shown in FIG.

The vibration isolating member 5 includes an inner cylindrical portion 51 through which a hexagonal bolt B (connecting member) for connecting the joist connecting portions 41, 41 to the joist 2 is inserted through the insertion holes 41c, 41c, and an inner cylindrical portion 51. A cylindrical outer cylinder portion 53 provided coaxially with the inner cylinder portion 51 around the outer periphery of the 51, and a rubber elastic portion provided between the inner cylinder portion 51 and the outer cylinder portion 53 and connecting the both 51 and 53 to each other. 52. The axial length of the inner cylindrical portion 51 is the same as the distance between the joist connecting portions 41 , 41 . The axial lengths of the outer cylindrical portion 53 and the rubber elastic portion 52 are the same as the width of the joists 2 . The outer tubular portion 53, the rubber elastic portion 52, and the inner tubular portion 51 are press-fitted into the through hole 2a as one unit.

The hexagon bolt B is inserted through the insertion hole 41c of the joist connecting portion 41 on one side (on the right side in FIG. 7) of the joist connecting portions 41, 41, and then passed through the inner cylindrical portion 51. It is made to protrude from the insertion hole 41c of the connection part 41 for joists on the other side. A nut N is screwed to the tip of the hexagon bolt B. As shown in FIG.

(effect)
As described above, according to the present embodiment, since the joist receiving members 4 for receiving the joists 2 are connected to the side surfaces of the frame 1, the configuration is simple as in the first and second embodiments. The vibration isolating member 5 includes an inner cylindrical portion 51 embedded in the joist 2, inserted through the insertion holes 41c, 41c of the joist receiving member 4, and through which a hexagon bolt B for connection to the joist is inserted. Since the joist receiving member 4 has the rubber elastic portion 52 provided on the outer peripheral surface of the portion 51, the joist receiving member 4 can be attached to the frame 1 while supporting the joist 2 in a vibration-proof manner. Therefore, according to this embodiment, the vibration-damping mounting structure S for joists having a simple configuration can be obtained.

Further, since the vibration isolating member 5 has the outer cylindrical portion 53 and the rubber elastic portion 52 is provided between the inner cylindrical portion 51 and the outer cylindrical portion 53, the vibration isolating member 5 can be easily embedded in the joist 2 and The anti-vibration mounting structure S can be easily assembled.

In this embodiment, the vibration isolating member 5 has the outer cylindrical portion 53, but may not have it.

INDUSTRIAL APPLICABILITY The present invention is extremely useful as a vibration isolation mounting structure for joists.

S Joist anti-vibration mounting structure 1 Frame 2 Joist 2a Through hole 3 Mounting member 4 Joist receiving member 41 Joist connecting portion 41a Fitting hole 41b Screw insertion hole 41c Insertion hole 42 Receiving portion 42a Rubber elastic body 43 Frame connecting portion 43a Screw insertion hole 43b Fitting hole 5 Anti-vibration member 51 Inner cylinder portion 52 Rubber elastic portion 52a Main body portion 52b First extension portion 52c Second extension portion 53 Outer cylinder portion V1 Frame screw (connecting member)
V2 joist screw (connecting member)
B Hex bolt (connecting member)
N nut

Claims (6)

A joist anti-vibration mounting structure for attaching joists to a building frame,
a joist receiving member having a joist connecting portion formed with a fitting hole and connected to the side surface of the joist, and connected to the side surface of the frame to receive the joist;
a vibration isolating member fitted in the fitting hole,
The anti-vibration member has an inner cylindrical portion through which a connecting member for connecting the connecting portion for the joist to the side surface of the joist is inserted, and a rubber elastic portion provided on the outer peripheral surface of the inner cylindrical portion. ,
The inner cylindrical portion is integral,
an end of the inner cylindrical portion on the joist side contacts a side surface of the joist, and an end of the inner cylindrical portion opposite to the joist contacts the connecting member;
The rubber elastic portion is
a body portion arranged in the fitting hole;
a first extending portion extending radially outward from the end portion of the main body portion on the joist side;
a second extending portion extending radially outward at the end portion of the main body portion opposite to the joist;
has
Both the outer diameter of the first extending portion and the outer diameter of the second extending portion are larger than the inner diameter of the fitting hole, and the outer shape of the second extending portion is equal to that of the first extending portion. larger than the outer diameter,
Anti-vibration mounting structure for joists. A joist anti-vibration mounting structure for attaching joists to a building frame,
a joist receiving member having a skeleton connection part formed with a fitting hole and connected to a side surface of the skeleton, and connected to the joist to receive the joist;
a vibration isolating member fitted in the fitting hole,
The vibration isolating member includes an inner cylindrical portion through which a connecting member for connecting the connecting portion for the skeleton to the skeleton is inserted, and a rubber member inserted through the fitting hole and provided on the outer peripheral surface of the inner cylindrical portion. and an elastic portion ;
The end of the inner cylindrical portion on the side of the joist is in contact with the connecting member, and the end of the inner cylindrical portion on the side opposite to the joist is in contact with the side surface of the frame,
The rubber elastic portion is
a body portion arranged in the fitting hole;
a first extending portion extending radially outward from an end portion of the main body portion on the side of the skeleton;
a second extending portion extending radially outward from the end portion of the main body portion opposite to the skeleton;
has
Both the outer diameter of the first extension portion and the outer diameter of the second extension portion are larger than the inner diameter of the fitting hole, and the outer diameter of the second extension portion is equal to the outer diameter of the first extension portion. greater than the outer diameter of
Anti-vibration mounting structure for joists. A vibration-proof mounting structure for a joist for mounting a joist having a through hole extending in the width direction therethrough to a building frame,
a joist receiving member having a joist connecting portion formed with an insertion hole and connected to a side surface of the joist, and connected to a side surface of the frame to receive the joist;
a vibration isolating member arranged in the through hole in the joist,
The anti-vibration member is provided on an inner cylindrical portion through which a connection member for connecting the joist connecting portion to the side surface of the joist is inserted through the insertion hole, and on the outer peripheral surface of the inner cylindrical portion. and a rubber elastic portion ,
The joist connection part is provided on each of one side surface and the other side surface of the joist,
One end of the inner cylindrical portion is in contact with the joist connecting portion provided on one side surface of the joist, and the other end of the inner cylindrical portion is provided on the other side surface of the joist. in contact with the joist connecting portion;
Anti-vibration mounting structure for joists. In claim 3,
The anti-vibration member further has an outer cylinder part provided around the inner cylinder part, and the rubber elastic part is provided between the inner cylinder part and the outer cylinder part to connect them to each other. Anti-vibration mounting structure for joist. In any one of claims 1 to 4 ,
The joist receiving members include a pair of joist connecting portions that are provided on both lateral sides of the joist so as to face each other in the width direction and are connected to the side surfaces of the joist, and lower ends of the two joist connecting portions. a pair of receiving parts that connect the joists to each other and receive the joists; A vibration-isolating mounting structure for joists having a connection part for a building frame. In claim 5 ,
A vibration isolating structure for a joist, wherein a rubber elastic body is provided between the lower surface of the joist and the receiving portion.

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