JP6062390B2 - Concrete plate fixing bracket - Google Patents

Description

  The present invention relates to a fixture for fixing a concrete plate on a beam in a floor structure using the concrete plate.

In a steel-frame building, the method of fixing the concrete plate as the flooring to the beam is to fix one of the Z-shaped brackets with a step to the concrete plate and the other to the lower part of the upper flange of the beam A method of abutting is known. (Fig. 7)
A cushioning material such as rubber is provided between the metal fitting and the upper flange.

In the case where an anti-vibration material on a beam is placed between a concrete plate and a beam for the purpose of anti-vibration, if a load is applied to the concrete plate, the anti-vibration material on the beam is compressed and the entire concrete plate is displaced. It will be in the form of sinking. At this time, a space is created between the metal fitting and the upper flange of the beam member (FIG. 8).
After that, when the loaded load is removed, the anti-vibration material on the beam is restored, the concrete plate rises, and the metal fitting and the beam material come into contact. At this time, the shock-absorbing material suppresses the metal sound when the metal fitting and the beam material come into contact with each other, but even if the sound range is lowered from the high sound range, it is difficult to prevent the generation of sound in the low sound range.
In addition, when there is already a space between the metal fitting and the beam member in a state where the load is zero, the concrete plate jumps up due to the restoring force of the vibration isolator on the beam, and vibration and noise are generated (FIG. 9).

  It is an object of the present invention to provide a concrete plate fixing metal fitting that prevents noise caused by contact between the metal fitting and the beam member and the concrete plate jumping up.

The fixing member for a concrete plate of the present invention that solves the above problems includes a connecting portion that is connected to a beam member, a stepped portion that rises from an end portion of the connecting portion, and extends horizontally from the upper end of the stepped portion. a fixed portion consists, the the fixing portion forms a bolt insertion hole, wherein the elastic member provided on the upper surface of the connecting portion, the fixed portion by a bolt which is inserted from below into the bolt insertion holes of the front Symbol fixing portion Is fixed to the lower surface of the concrete plate, the elastic body is located between the connecting portion and the lower surface of the upper flange of the beam member, and the upper surface of the elastic body is aligned with the vertical movement of the concrete plate. The elastic body has a length that expands and contracts while being in contact with the lower surface of the flange, and when the load on the concrete plate is zero, the elastic body is compressed most.

Since the concrete plate fixing bracket of the present invention is as described above, one of the following effects can be obtained.
(1) Since it attaches to the lower surface of a concrete board with a volt | bolt, it can attach easily.
(2) An elastic body is disposed between the upper flange lower surface of the beam material and the connecting piece of the metal fitting. When the anti-vibration material on the beam is compressed by the load on the concrete plate and the concrete plate sinks, the elastic body expands, so that no space is created between the metal fitting and the beam material. Since no space is generated, no noise is generated due to contact between the beam and the metal fitting when the load is removed and the anti-vibration material on the beam is restored.
(3) Since the elastic body is most compressed when the load is zero, the load is applied to the concrete plate and the elastic body expands. Then, the load is removed and the anti-vibration material on the beam is restored. When the plate rises, the upper layer speed of the concrete plate is slowed by the elastic force of the elastic body. Thereby, noise at the time of restoration can be reduced.
(4) Since the elastic body is compressed most when the load capacity is zero, when the anti-vibration material on the beam is restored, the elastic body contracts only to the position where the load capacity is zero, and the concrete board jumps up. There is no.
(5) Since the concrete board does not jump up, the vibration of the concrete board is suppressed and noise is prevented.

Explanatory drawing of the usage state of the fixing bracket Perspective view of fixing bracket Explanatory drawing of deformation of fixing bracket The perspective view of the fixing metal fitting concerning other Examples Explanatory drawing of the usage state of the fixing bracket according to the other examples Explanatory drawing of the deformation | transformation of the fixing metal fitting concerning another Example Explanatory drawing of conventional fixture (1) Explanatory drawing of conventional fixture (2) Explanatory drawing of conventional fixture (3)

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

<1> Basic Configuration The fixture 1 of the present invention is a member for fixing the concrete plate 3 on the beam member 2.
The fixing metal fitting 1 is a rectangular flat plate bent in a substantially Z shape, and extends horizontally from the connecting portion 4, the step portion 5 rising from the end portion of the connecting portion 4, and the upper end of the step portion 5. And a fixing portion 6 (FIG. 2).
Bolt insertion holes 61 are formed in the fixing portion 6.
An elastic body 7 is provided on the upper surface of the connecting portion 4.

<2> Elastic Body The elastic body 7 includes a spring 71, a pin insertion hole 41 provided in the connecting portion 4, a pin 72 inserted into the spring 71, and an upper plate 73 provided at an end of the pin 72 extending from the spring 71. Consists of. The spring 71 is a coil spring.
A stopper 74 having a diameter larger than that of the pin insertion hole 41 is provided at an end portion of the pin 72 extending downward from the pin insertion hole 41. The length of the pin 72 is shorter than the free length of the spring 71.
By configuring in this way, the spring 71 is energized and held between the connecting portion 4 and the upper plate 73. At this time, the length of the spring 71 is set longer than the amount of displacement of the concrete plate 3 in the vertical direction, so that the spring 71 expands and contracts according to the vertical movement of the concrete plate 3.

<2-1> Expansion and contraction of elastic body When a downward load is applied to the upper plate 73 of the elastic body 7, the spring 71 is compressed. At this time, the pin 72 and the pin insertion hole 41 serve as a guide, and the spring 71 is uniformly compressed in the axial direction without falling down or bending.
When the load is removed, the spring 71 extends until the pin 72 and the pin insertion hole 41 serve as a guide and the stopper 74 comes into contact with the lower surface of the connecting portion 4 as in compression.

<3> Fixing Mode Next, a fixing mode of the concrete plate 3 using the fixing bracket 1 will be described.
The fixing bracket 1 of the present invention is for fixing a concrete plate 3 on a beam member 2. An anti-vibration material 8 on the beam is disposed between the beam member 2 and the concrete plate 3 (FIG. 1).
The fixing metal fitting 1 of the present invention is fixed to the lower surface of the concrete plate 3 by a bolt 62 inserted into the bolt insertion hole 61 of the fixing portion 6.
Then, the step portion 5 falls substantially parallel to the web of the beam member 2, and the connecting portion 4 extends in parallel with the upper flange 21 of the beam member 2 from the lower end of the step portion 5.
The elastic body 7 is located between the connecting portion 4 and the upper flange 21 of the beam member 2.

<3-1> When Load Capacity is Zero The upper surface of the upper plate 73 of the elastic body 7 is in contact with the lower surface of the upper flange 21 of the beam member 2. Then, when the load on the upper surface of the concrete plate 3 is zero (the load on the floor structure is zero), the step portion is set so that the spring 71 of the elastic body 7 has a contact length (most compressed state). The height of 5 and the length of the spring 71 are determined in advance.

<3-2> When a loading load is applied When a loading load is applied to the upper surface of the concrete plate 3, the on-beam vibration isolator 8 is compressed, and the entire concrete plate 3 is displaced and sinks (FIG. 3).
When the concrete plate 3 sinks, the fixing bracket 1 fixed to the lower surface of the concrete plate 3 is also lowered at the same time, but the elastic body 7 has the spring 71 extended while the upper plate 73 is in contact with the upper flange 21. Since the length of the spring 71 is longer than the displacement amount of the concrete plate 3, even when the position of the concrete plate 3 is displaced to the maximum, the upper plate 73 does not leave the upper flange 21 and remains in contact.

<3-3> When the loading load is removed When the loading load on the upper surface of the concrete plate 3 is removed, the concrete plate 3 rises back to the original position by the restoring force of the vibration isolator 8 on the beam. .
Since the upper plate 73 and the upper flange 21 remain in contact with each other, no contact sound is generated between the upper plate 73 and the upper flange 21. And the restoring force of the spring 71 acts downward on the rising concrete plate 3, and the rising speed of the concrete plate 3 is reduced. This reduces the generation of noise during restoration.
When the on-beam vibration isolator 8 is restored until the concrete plate 3 returns to the original position, the spring 71 is compressed most, so that the concrete plate 3 jumps up and no vibration is generated, and noise is prevented.
As described above, the spring 71 of the elastic body 7 exhibits the noise prevention effect to the maximum when the length when the loading load of the concrete plate 3 is zero is the contact length.

[Other Examples]
In the embodiment described above, the elastic body 7 is constituted by the spring 71, but may be constituted by an elastomer 75 and a fixing pin 76 having the upper plate 73.
The elastomer 75 is a hollow columnar body having an insertion hole 751 along the axis, and the fixing pin 76 is inserted into the insertion hole 751.
The length of the fixing pin 76 is shorter than the free length of the elastomer 75.
When the loading load on the top surface of the concrete plate 3 is zero (the loading load on the floor structure is zero), the height of the stepped portion 5 and the fixing are fixed so that the lower end of the fixing pin 76 contacts the connecting portion 4 (FIG. 5). The length of the pin 76 is determined in advance.
Further, even when the position of the concrete plate 3 is displaced to the maximum, the length of the elastomer 75 is made longer than the displacement amount of the concrete plate 3 so that the upper plate 73 is not separated from the upper flange 21.
By configuring in this way, the elastomer 75 is expanded and contracted uniformly in the axial direction, with the insertion hole 751 and the fixing pin 76 serving as a guide.

When a loading load is applied to the upper surface of the concrete plate 3, the on-beam vibration isolator 8 is compressed, the entire concrete plate 3 sinks, and the elastic body 7 has the elastomer 75 while the upper plate 73 is in contact with the upper flange 21. Expands. Since the length of the elastomer 75 is longer than the displacement amount of the concrete plate 3, even when the position of the concrete plate 3 is displaced to the maximum, the upper plate 73 does not leave the upper flange 21 and remains in contact therewith.
Then, when the load on the upper surface of the concrete plate 3 is removed, the concrete plate 3 is raised so as to return to the original position by the restoring force of the on-beam vibration isolator 8.
Since the upper plate 73 and the upper flange 21 remain in contact with each other, no contact sound is generated between the upper plate 73 and the upper flange 21. Then, the restoring force of the elastomer plate 3 acts downward on the rising concrete plate 3, and the rising speed of the concrete plate 3 is reduced. This reduces the generation of noise during restoration.
When the on-beam vibration isolator 8 is restored until the concrete plate 3 returns to the original position, the lower end of the fixing pin 76 comes into contact with the connecting portion 4, and the elastomer 75 is not further compressed, and the concrete plate 3 is It will not jump up and generate vibration.

DESCRIPTION OF SYMBOLS 1 Fixing metal 2 Beam material 21 Upper flange 3 Concrete board 4 Connecting part 5 Step part 6 Fixing part 61 Bolt insertion hole 62 Bolt 7 Elastic body 71 Spring 72 Pin 73 Upper plate 74 Stopper 75 Elastomer 751 Insertion hole 76 Fixing pin 8 On the beam Anti-vibration material

Claims (1)

A connecting portion for connecting to the beam material;
A stepped portion rising from the end of the connecting portion;
A fixing portion extending horizontally from the upper end of the stepped portion,
A bolt insertion hole is formed in the fixing portion,
An elastic body is provided on the upper surface of the connecting portion ,
The fixing portion is fixed to the lower surface of the concrete plate by a bolt inserted from below into the bolt insertion hole of the fixing portion,
The elastic body is located between the connecting portion and the lower surface of the upper flange of the beam member;
The elastic body has a length that expands and contracts while the upper surface is in contact with the lower surface of the upper flange in accordance with the vertical movement of the concrete plate,
When the load on the concrete plate is zero, the elastic body is most compressed,
Fixing bracket for concrete plate.

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