Joints and connections – Molded joint – Socket or open cup for bonding material
Reexamination Certificate
1998-06-09
2001-03-13
Kim, Harry C. (Department: 3629)
Joints and connections
Molded joint
Socket or open cup for bonding material
C403S006000, C403S292000
Reexamination Certificate
active
06200061
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a connector for connecting inter-woods or inter-laminated wood or inter-stones or connecting woods or laminated wood or stones or concretes, a method for connecting structural members of a wooden house using the connectors and framework structures of a large-sized wooden building having a heavy timber structure and the like, and a connection structure between the structural members.
2. Description of the Related Arts
In recent years, connecting method have been developed aimed at labor saving or streamlined processes for building of a dwelling house or the like and further aiming at a connection between a beam and a pole plate, a pole plate and a column, a body joint and an independent column and the like or a connection structure or a coupling structure and the like aiming at a streamlining of work.
For example, {circle around (1)} Jap. U.M. Laid-Open No. Sho 63-162008 discloses a framework fitting to be used in a wooden framework, {circle around (2)} Jap. U.M. Laid-Open No. Hei 2-93401 discloses a reinforcing fitting for a lower end of a column of a framework wooden building and a connection part with a foundation of the building, {circle around (3)} Jap. Pat. Laid-Open No Hei 3-295946 discloses a trap dowel fitting and a lathing structure of a framework wooden building using the dowel fitting, {circle around (4)} Jap. Pat. laid-Open No. Hei 2-300442 discloses a connection structure of wooden structural members in which the wooden framework is not disassembled after its connection. All these prior arts use fittings, bolts and nuts for connecting inter-structural members.
In addition, as connection part structures, Jap. Pat. Laid-Open Nos. Sho 63-14939, Sho 63-14940 and Sho 63-14941 disclose a connection part structure in a wooden framework aiming at improved structural strength of the connection part.
However, the aforesaid prior art connectors or connection part structures had problems in that their structures were complex and lacked operability due to the fact that bolts or nuts or washers had to be inserted and fixed during laminated wood and an excessive plurality of component parts were required. In addition, they had problems that their fittings were large in size, heavy in their weight and lacked convenient transport characteristics and further they were lacking in safety for working at a elevated locations due to the fact that physical strength such as bending, tention, compression or shearing and the like were required.
During the laminated wood, problems occurred in fixing the fitting and another problem was the troublesome operation of removing the fitting and rearranging it and at the same time another problem was that a cutting work was mistakenly carried out at the connecting surface to cause loss of a structural member such as wooden member. In addition, it had problems that installing a cylinder punched at a predetermined position or a plug member at a predetermined position and a threadable fitting of a bolt into a punched hole of the installed cylinder or the plug was difficult, their operability was inferior, a quite large number of working steps were required and the working period was extended.
The system in which the wooden members were fixed by bolts or nuts had problems that shrinkage of wooden members caused wooden members to loosen easily and also physical strength of the system to be decreased. In addition, problems occurred such that bolts or nuts or fittings and the like were oxidized by dew formation and the like to cause their strength to be decreased and at the same time some imported wooden members due to their storage in marine areas, caused the bolts or fittings and the like to be declayed by salt pollution, resulting in showing deterioration of their physical strength and durability.
In addition, problems occurred in disasters in that the outer connecting bolts or fittings were the first melt during a fire, their strength was insufficient and housing collapsed. In addition, the maximum disadvantage of a framework structure having wooden members therein was brittleness of the connecting parts. Although various kinds of connection parts or couplings were devised by carpenters in the past to retain their physical strength, almost all these structures had problems in that they were complex in structure, a large number of working steps were required and poor productivity resulted. In addition, problems occurred in insufficient production of wooden members having a large sectional area, their procurement was difficult and a wooden structure such as a beam of long span or the like could not be transported due to Road Traffic Control Law restrictions.
Further, in recent years, there have been developed connecting methods for connecting structural members or a connection structure in which a metallic connector is used in place of various kinds of prior art joints or coupling structures in wooden buildings so as to improve a operability during installation and a working time is shortened.
For example, Jap. Pat. Laid-Open No.Hei 3-5543 discloses a connecting method for members in a wooden structure which is superior in its operation and has high reliability in view of its structure in which a steel rod is inserted into each steel rod buried hole punched at each of the wooden members to be connected to each other, extending axially of the members, and opened at connecting end surfaces and an adhesive agent is filled in the burying holes, outer circumferences of the connecting surfaces of both wooden members are sealingly closed in advance, thereafter the adhesive agent is forcedly fed into the steel rod inserting holes and the adhesive agent is filled in a clearance between an inner circumferential surface of each of the burying holes and the steel rod and also the adhesive agent is charged in a clearance between the connecting surfaces of both wooden members and they are in close contact with each other.
However, the aforesaid prior art configuration has the following problems, i.e.
{circle around (1)} opening of three holes for use in aeration of air and filling confirmation for one steel rod burying hole not visible to human eyes may reduce ease of operation, requires a strict forming angle of the buried hole and further accompanying a difficulty in performing the punching operation;
{circle around (2)} the adhesive agent filled the clearance between the connecting surfaces sealingly closed at their circumferences when the adhesive agent is fed through a feeding hole flows into another burying hole or accompanied with air from another burying hole or another feeding hole to cause non-uniform filling;
{circle around (3)} a solidification of sealing agent requires a long period, a pressurized feeding stage of the adhesive agent cannot be performed at once and it is a slow operation;
{circle around (4)} an independent column and a beam cannot be connected at their ends at particular sites and it lacks ease of operation; and
{circle around (5)} upon completion of the work, reinforcement work can not be carried out in view of its ease of operation process.
It is the first object of the present invention to provide a connector in which the conventional complex connection part or coupling structure is of quite simple structure, structural strength is improved together with adhesive agent, operability of connection part or coupling or connecting work is remarkably improved and the working period can be remarkably shortened; a method for connecting the structural members in which a working technology for the connection part, coupling or connecting operation is simplified by using the connector, the number of working steps is remarkably reduced and it has a superior productivity of a building and the like; and a connection structure between structural members which is superior in structural strength and provides improved strength during disasters.
The second object of the invention is to provide a connector in which an adhesive can be easily poured, removal of the connect
Home Co. Ltd.
Kim Harry C.
Lane Aitken & McCann
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