JP3720302B2 - Mortise pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a mortise pipe, more specifically, a pipe used to fix a pillar to a foundation in the framework of a wooden house, with the upper half embedded in the pedestal and the lower half embedded in the foundation. It is about the mortise pipe.
[0002]
[Prior art]
As shown in FIG. 3, the mortise pipe 21 is inserted into a mortise hole drilled in the pillar 22 and fixed with a drift pin 24, and the lower half is inserted into a mortise hole drilled in the base 23. It is a hardware that plays the role of joining the pillar to the base 23 by fixing it with the drift pin 24.
[0003]
The conventional tenon pipe 21 has a simple cylindrical shape, and has a through hole for inserting the drift pin 24 inserted into the pedestal 22 and the base 23 as described above. It does not have. Therefore, the mortise pipe 21 is rubbed against the inner wall of the mortise due to a shake such as an earthquake, and the mortise is easily damaged due to the overlapping.
[0004]
[Problems to be solved by the invention]
As described above, the conventional mortise pipe is simply a cylinder provided with an insertion hole, and no consideration is given to vibration suppression. Therefore, there is a possibility that the joint portion of the connecting material may be damaged.
Therefore, the present invention provides a tenon pipe that has moderate vibration damping properties, can reduce shaking such as an earthquake, and has no risk of damaging the joint of the connecting material even when subjected to repeated vibrations. This is the issue.
[0005]
[Means for Solving the Problems]
The present invention is provided with a metal outer cylinder appropriately drilled with an insertion hole in an upper part and a lower part, and a metal damper is provided in the outer cylinder via a damping damper made of a viscoelastic substance such as natural rubber or synthetic rubber. The inner and outer cylinders are provided, and the damper and the inner cylinder are provided with insertion holes that communicate with the insertion holes of the outer cylinder and have different hole diameters, and the relationship between the diameters of the insertion holes of the inner and outer cylinders is expressed as follows. The above problem was solved with a mortise pipe characterized in that it was reversed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a metal outer cylinder similar to a conventional tenon pipe, which has a cylindrical shape, and generally has insertion holes 2 to 4 penetrating laterally at two upper portions and one lower portion, respectively. . The two upper insertion holes 2 and 3 are arranged in steps so that the drift pins 7 do not cross each other by changing the direction by 90 degrees. A bolt may be used instead of the drift pin 7.
[0007]
Reference numeral 5 denotes an inner cylinder that is bonded and fixed to the inner surface of the outer cylinder 1 with the damper 6 interposed therebetween, and is usually made of the same metal as the outer cylinder 1. The outer cylinder 1 and the inner cylinder 5 can be displaced in all directions relatively by the action of a damper 6 described later.
[0008]
The inner cylinder 5 and the damper 6 are provided with insertion holes 2a to 4a communicating with the insertion holes 2 to 4, respectively. The insertion holes 2a to 4a have different hole diameters from the insertion holes 2 to 4 of the outer cylinder 1. However, the size relationship of the hole diameters is reversed between the upper one and the lower one.
[0009]
That is, when the outer insertion holes 2 and 3 in the upper part have a larger diameter than the inner insertion holes 2a and 3a, the outer insertion hole 4 in the lower part has a smaller diameter than the inner insertion hole 4a (example shown in FIG. 1). On the other hand, when the outer insertion holes 2 and 3 in the upper part have a smaller diameter than the inner insertion holes 2a and 3a, the outer insertion hole 4 in the lower part has a larger diameter than the inner insertion hole 4a. .
[0010]
The mortise pipe having the above-described configuration is used by being embedded in the pedestal and the base and pinned in the same manner as the conventional one. In this case, in the example shown in FIG. The drift pin 7 inserted into the insertion holes 3 and 3 a hits the edge of the inner insertion holes 2 a and 3 a, but does not hit the edge of the outer insertion holes 2 and 3. Conversely, the drift pin 8 inserted through the insertion holes 4 and 4a hits the edge of the outer insertion hole 4, but does not hit the edge of the inner insertion hole 4a. Therefore, in this case, the outer cylinder 1 vibrates integrally with the base, and the inner cylinder 5 vibrates integrally with the pillar.
[0011]
When the base is shaken in response to the vibration in this way, the vibration of the base is directly transmitted to the outer cylinder 1 through the drift pin 8 and the lower outer insertion hole 4, but is transmitted to the inner cylinder 5 through the damper 6. Since the damper 6 is made of a viscoelastic material such as natural rubber or synthetic rubber, the damper 6 is subjected to shear deformation (shear deformation) due to vibration, and vibration energy is converted into heat energy and attenuated. As a result, the vibration is buffered during transmission from the outer cylinder 1 to the inner cylinder 5, and the fluctuation of the inner cylinder 5 becomes smaller than that of the outer cylinder 1. Thus, the shaking of the base is buffered and transmitted to the pillar, so that the shaking of the entire house can be suppressed.
[0012]
【The invention's effect】
Since the present invention is as described above and has an appropriate vibration damping property, it is possible to reduce shaking such as an earthquake, and there is no possibility of damaging the joint portion of the connecting material even if subjected to repeated vibrations. There is an effect that can provide a tenon pipe.
[Brief description of the drawings]
FIG. 1 is a diagram showing the configuration of a mortise pipe according to the present invention.
2 is a cross-sectional view taken along line AA, BB, and CC in FIG. 1. FIG.
FIG. 3 is a view showing how to use a mortise pipe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Insertion hole 2a Insertion hole 3 Insertion hole 3a Insertion hole 4 Insertion hole 4a Insertion hole 5 Inner cylinder 6 Damper 7 Drift pin 8 Drift pin

Claims (1)

Metal outer cylinders with appropriate insertion holes are provided in the upper and lower parts, and a metal inner cylinder is inserted into the outer cylinder via a damping damper made of a viscoelastic material such as natural rubber or synthetic rubber. The damper and the inner cylinder are provided with insertion holes that communicate with the insertion hole of the outer cylinder and have different hole diameters, and the size relationship between the insertion holes of the inner and outer cylinders is reversed between the upper part and the lower part. Tenon pipe characterized by that.

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