JP6651286B2 - Wedge with automatic penetration device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wedge with an automatic penetrating device, which is used for a pillar and pier structure of a wooden building, and does not reduce the effect of a wooden wedge (wedge) even under repeated horizontal loads.

  The structure of passing through a pillar and tightening with a wedge was introduced from the Song of the Kamakura period and is a structural feature of the so-called Zen Zen sect. It has been passed down to the present day as a structure with excellent resistance to horizontal load in traditional Japanese wooden buildings, and its strength has been proven by history. However, it is a well-known fact that this structure suffers from a slack between the driven wedge and the column when the horizontal load is repeatedly applied, and the structural strength of the "column-pierce" is reduced.

  In order to prevent such a decrease in the structural strength of the "column-penetration", two pairs of wedges are arranged symmetrically on a straight line, and the paired wedges are connected by a bolt axis, thus repeatedly A structure that prevents the wedge from loosening even under a load has been considered.

JP 2010-7436 A

"Building Structural Studies 15th Edition", Shirou Hori, Maruzen p.91-p.92

  However, in the conventional method, according to the results of the experiment for verifying the effect of the present inventors, when the inclination of the column gradually increases due to the repeated horizontal load, the bolt shaft connecting the pair of wedges is deformed. As a result, it is difficult for the force to be smoothly transmitted in a direction in which the wedges are attracted to each other, and there is a disadvantage that the wedges are not pushed into the center of the column.

  The present invention has been made in view of the above-described conventional drawbacks, and has as its object to provide a wedge with an automatic penetrating device that prevents the wedge from being loosened even when a horizontal force is repeatedly applied.

In order to achieve the above object, the fixing portion of the device including the wedge, the compressed spring, and the fixing portion at the upper end is fixed with screws or the like. As a result, the wedge is always pushed forward, toward the center of the column, and as a result, the "column-pierce" structure is repeatedly subjected to a horizontal load, and if there is a gap between the column and the penetrator, the wedge is instantly moved to the center of the column. Is pushed toward. At this time, since this device is attached to each wedge, even if the "column-piercing" structure is greatly deformed, the wedge is pushed toward the center of the column without being affected by the behavior of the other pair of wedges.

As is clear from the above description, the following operational effects can be obtained in the present invention.
That is, unlike a conventional pair of wedges connected by a bolt shaft, each wooden wedge is configured to be pushed into the center of the column, so that the column is gradually inclined by repeated horizontal loads. Even if it becomes larger, the force of the spring is not impaired due to the deformation, the force for pushing the wedge into the center of the column is maintained, and no gap is generated between the column and the pier. The load deformation relationship showing the effect of the wedge due to the horizontal load is compared between the case where the conventional wedge shown in FIG. 4 is used and the case where the wedge with an automatic penetrating device according to the present invention shown in FIG. 5 is used. The area of the part surrounded by the curve of the graph representing the work load of one cycle of the horizontal repetitive load is almost twice as large in the case of using the wedge with the automatic penetrating device according to the present invention as in the conventional case. You can see that. This shows the effect of the seismic performance that the wooden wedge can absorb the seismic energy such as the horizontal load by crushing.

Sectional view of wedge with automatic penetrating device of the present invention Cross-sectional view of a conventional structure in which a pair of wedges are connected by a bolt shaft Side view of an experimental device for confirming the operation and effect of the wedge with an automatic penetrating device of the present invention Graph showing the relationship between load and deformation when using a conventional wedge Graph showing the relationship between load and deformation when using the wedge with automatic penetration device of the present invention Table showing the comparison of the work amount between the conventional wedge and the wedge with automatic penetration device

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

  FIG. 1 is a cross-sectional view of a wedge 1 with an automatic penetrating device according to the present invention. The wedge 1 with an automatic penetrating device is driven into a through hole 4 formed after passing a through 3 through a column 2 and integrated with a wedge 5. The coil spring 6 thus fixed is fixed to the penetrator 3 by a fixing portion 7 so that a constant force acts in the wedge driving direction.

  FIG. 2 shows a conventional pair of wedges 8 arranged symmetrically on a straight line, driven into each other toward the center, and the pair of wedges connected by a bolt shaft 9 so that even if a horizontal load is repeatedly applied, FIG. 4 is a cross-sectional view of a conventional method for preventing a wedge from loosening.

  FIG. 3 shows an experimental apparatus 11 used for confirming the effect of the wedge 10 with an automatic penetrating device of the present invention. Using a body, the capital and the pedestal are mechanical pin joints 14, and the penetrating ends are fulcrum 15 of the pin roller so that the joint portion bears only the moment without applying an axial force to the pier 13 during loading. The test specimen is supported. The load was applied to the H-shaped steel loading beam 16 using an oil jack 17. The loading method is based on the story deformation angle, and each of 1/300, 1/200, 1/150, 1/100, 1/75, 1/50, 1/30, 1/15, 1/10 (rad) A positive and negative alternation was applied three times each at the interlayer deformation angle. When the load did not fall below 80% even when it reached 1/10 (rad), monotonic loading was performed until 1/5 (rad).

  FIG. 4 is a graph showing the relationship between the load and the deformation when a conventional wedge is used. The load and the deformation are peculiar to the wooden joint, and the restoring force at the origin position was not observed even after repeated loading.

  FIG. 5 is a graph showing the relationship between load and deformation when the wedge with an automatic penetrating device according to the present invention is used. The shape is a spindle shape, and it is observed that the work amount is increased.

  In FIG. 6, the horizontal axis is graduated in each step of the loading method described in 0013, and the vertical axis is the accumulated work in each step order for comparison. Assuming that the accumulated work amount at each stage in the case of the conventional wedge is 1, when the wedge with the automatic penetrating device is used, the work amount at any stage is higher than that of the conventional wedge, and is at most twice as large. Indicates the value. This proves that the function and effect of the wedge with an automatic penetrating device of the present invention are remarkable.

  INDUSTRIAL APPLICABILITY The present invention is used in the construction industry for building a wooden frame construction.

1 wedge with automatic penetration device 2 pillar 3 penetration 4 penetration hole
5 Wooden wedge 6 Coil spring 7 Fixed part 8 Two wedges 9 to be paired 9 Bolt shaft 10 Wedge with automatic penetration device 11 Experimental device 12 Column 13 Penetration 14 Pin joint 15 Pin roller fulcrum 16 Loading beam 17 Oil jack

Claims (1)

A pair of wedges driven into the through hole formed after passing through the column with the column interposed therebetween, a pair of compressed springs respectively biasing the pair of wedges toward the center of the column , A wedge with an automatic penetrating device , comprising a pair of fixing portions fixed to the penetrator, the fixing portion supporting a side of the spring opposite to the wedge side biased by the spring .