JP7543764B2 - Connection structure, connection method, and wooden member - Google Patents

Description

The present invention relates to a connection structure and a connection method for connecting a wooden member to another member, and to a wooden member to which the connection structure is applied.

For example, Patent Document 1 discloses a connection structure using rod-shaped materials such as deformed reinforcing bars as a connection structure for wooden members. In Patent Document 1, the wooden members have connection holes into which the rod-shaped materials are inserted. Then, with the rod-shaped materials inserted, the connection holes are filled with cement and hardened, and the rod-shaped materials are used to connect the wooden members to other members. In such a connection structure, the frictional force generated between the wooden members and the cement counteracts the load that tries to pull the rod-shaped materials out of the wooden members.

JP 2003-193570 A

However, in the connection structure described in Patent Document 1, in order to provide a certain connection force, it was necessary to either lengthen the fixing length of the rod-shaped material or to subject the wooden members to complex processing using special tools.

The connection structure that solves the above problem is a connection structure that connects in a first direction, and includes a wooden member having a connection hole formed in the first direction and a communication hole formed in a second direction intersecting the first direction, one end of which is open to the outside and the other end of which is connected to the connection hole, a rod-shaped material inserted into the connection hole, a restraining material provided in the communication hole that restrains the movement of the rod-shaped material in the first direction, and a cement-based filler filled in the connection hole.

The connection method that solves the above problem is a connection method for connecting in a first direction, and includes the steps of forming a connection hole formed in the first direction and a communication hole formed in a second direction intersecting the first direction, one end of which is open to the outside and the other end of which is connected to the connection hole, in the wooden member, inserting a rod-shaped material into the connection hole, providing a restraining material in the communication hole that restrains the movement of the rod-shaped material in the first direction, and filling the connection hole with a cement-based filler.

The wooden members that solve the above problem are wooden members that are connected in a first direction, and have a connection hole formed in the first direction, into which a rod-shaped material is inserted and into which a cement-based filler is filled after the rod-shaped material is inserted, and a communication hole formed in a second direction intersecting the first direction, with one end opening to the outside and the other end communicating with the connection hole, and into which a restraining material that restrains the movement of the rod-shaped material in the first direction is disposed. This makes it possible to shorten the fixing length of the rod-shaped material without performing complex processing on the wooden members using special tools.

In the above-mentioned configuration, the restraining material may be a cement-based filler, which makes it possible to increase the strength of the restraining material compared to the wood member.
In the above-mentioned configuration, the restraining member may be an insert member inserted into the communication hole. In this way, for example, by using a round steel bar as the insert member, the strength of the restraining member can be increased compared to that of the wooden member.

In the above configuration, the restraining material may have a cement-based filler filled in the periphery of the insert material provided in the communication hole. This allows the restraining material to be composed of the insert material and the cement-based filler.

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of a connection structure. FIG. 2 is a partial perspective view showing the portion indicated by the arrow 2 in FIG. 1 . FIG. 4 is a partial plan view of the wooden member as viewed from a second direction. FIG. 4 is a partial cross-sectional view of the wood member taken along line 4-4 in FIG. 3 . 11 is a flowchart showing an embodiment of a connection method using a connection structure. FIG. 4 is a partial plan view of a wooden member into which an insert is pressed, viewed from the connection surface side. FIG. 4 is a partial cross-sectional view showing a state in which a cement-based filler is formed in the extending direction of the rod-shaped material. FIG. 4 is a partial cross-sectional view showing a state in which a cement-based filler is formed in the cross-sectional direction of the rod-shaped material. FIG. 11 is a partial cross-sectional view showing a state in which a cement-based filler is formed in the cross-sectional direction of a rod-shaped material in a modified example. FIG. 11 is a partial cross-sectional view showing a modified example in which a cement-based filler is used as a restraining material in the cross-sectional direction of the rod-shaped material. 13 is a partial cross-sectional view showing an example of the arrangement of an insert member in the cross-sectional direction of a bar-shaped member in a modified example. FIG.

An embodiment of a connection structure, a connection method, and a wooden member will be described with reference to FIGS.
As shown in FIG. 1, the connection structure of this embodiment connects a wooden member 11 having a rectangular cross section to another member 20 in a first direction (the vertical direction in FIG. 1). The wooden member 11 is a part of a member constituting a building, such as a beam or a floor. The wooden member 11 has a plurality of connection holes 12 with openings on a connection surface 11a, which is one end surface in the first direction. A rod-shaped material 13 is inserted into each connection hole 12. The rod-shaped material 13 protrudes from the connection surface 11a in the first direction. The wooden member 11 is connected to the other member 20 by utilizing the protruding portion of the rod-shaped material 13. The rod-shaped material 13 can be composed of a material having a higher strength than the wooden member 11, such as a deformed bar, a fully threaded bolt, or a glass fiber bar. In this embodiment, the rod-shaped material 13 is a deformed bar. In each drawing, the rod-shaped material 13 is drawn based on the outermost diameter of the deformed bar.

As shown in FIG. 2, a plurality of communication holes 14 are formed in the wooden member 11 so as to correspond to each of the connection holes 12. Each communication hole 14 has an opening in the side surface 11b of the wooden member 11. Each communication hole 14 extends in a second direction intersecting the first direction and communicates with the connection hole 12. An insert member 15 made of a material stronger than the wooden member 11 is disposed in each communication hole 14. In this embodiment, the insert member 15 is made of round steel. A portion of the insert member 15 is disposed in the connection hole 12 so as to pass through the side of the rod-shaped material 13. In FIG. 2, the reference numerals 14 for the communication holes and the reference numerals 15 for the insert members are alternately given in the first direction.

In the connection holes 12 of the wooden members 11, cement-based filler 16 is formed to integrate the rod-shaped members 13 and each insert member 15. The insert members 15 integrated with the rod-shaped members 13 function as restraining members that restrain the movement of the rod-shaped members 13 in the first direction. In this embodiment, the nominal diameter D of the rod-shaped members 13 is 25, and the diameter of the insert members 15 is 13 mm. This allows the insert members 15, which have appropriate mechanical strength, to be positioned in a well-balanced manner.

The connection hole 12 is a circular hole extending in a first direction perpendicular to the connection surface 11a. The connection hole 12 may be a through hole or a non-through hole depending on the design concept at the time, such as the shape of the wooden member 11 where it is formed. The diameter of the connection hole 12 is set to a value that allows a gap of the order of millimeters to be formed between the rod-shaped material 13 and the insert material 15. By forming such a gap, the cement-based filler 16 can be reliably formed around a part of the insert material 15 arranged in the connection hole 12. In addition, the load that attempts to pull the rod-shaped material 13 from the wooden member 11 (hereinafter referred to as the pull-out load) can be reliably transmitted from the rod-shaped material 13 to the insert material 15 via the cement-based filler 16. In this embodiment, the connection hole diameter is 45 mm.

The wooden member 11 is preferably formed with an injection hole 17 that communicates with the connection hole 12. The injection hole 17 has an opening in the side surface 11b of the wooden member 11. The injection hole 17 is formed so that the entire area overlaps with the connection hole 12 when the wooden member 11 is viewed from the second direction. The injection hole 17 communicates with the connection hole 12 at its deepest part. The injection hole 17 is a hole that is used when injecting cement that forms the cement-based filler 16 into the connection hole 12.

Each communication hole 14 is a circular hole extending in the second direction. Each communication hole 14 is formed so that a portion of the communication hole 14 overlaps with the connection hole 12 when the wooden member 11 is viewed from the second direction. This allows the insert 15 to be arranged so that it passes through the side of the rod-shaped material 13. The communication holes 14 may be through holes or blind holes depending on the design concept at the time, such as the shape of the wooden member 11 where the communication holes 14 are formed.

As shown in FIG. 3, the multiple communication holes 14 are arranged along the first direction on both sides of the connection hole 12 in the first direction. The communication hole diameter, which is the diameter of each communication hole 14, is set to a value that allows the insertion material 15 to be pressed in.

In this embodiment, the nominal diameter D of the deformed bar 13 is 25, the diameter of the insert 15 is 13 mm, and the connection hole diameter is 45 mm. In addition, each communication hole 14 is formed at a position that theoretically creates a gap of 3.3 mm between the bar steel portion of the bar 13 and the insert 15, and a gap of 2 mm between the outermost portion of the bar 13 (node portion and rib portion) and the insert 15.

The pitch P1, which is the distance between the communication holes 14 in the first direction, is preferably set to 2Dmm to 5Dmm using the nominal diameter D of the rod-shaped material 13. By setting the pitch P1 to 2Dmm or more, the wood member 11 can be guaranteed sufficient strength for processing and practical use in the portions between adjacent communication holes 14. By setting the pitch P1 to 5Dmm or less, an appropriate number of inserts 15 can be placed without increasing the fixing length. In this embodiment, the pitch P1 is set to 2Dmm.

As shown in FIG. 4, in this embodiment, each communication hole 14 is a non-through hole. Each communication hole 14 is connected to the connection hole 12. The depth of the communication hole 14 is set to a value such that the deepest part is located on the inner side of the outermost edge of the connection hole 12 in the second direction. The length of each insert 15 is set to a value such that it does not protrude from the side surface 11b even when pressed into the deepest part.

An example of a connection method using the above-described connection structure will be described with reference to FIG.
5, first, a connection hole forming step is performed to form the connection hole 12 in the wooden member 11 (step S101). In the connection hole forming step, the connection surface 11a of the wooden member 11 is aligned with a woodworking drill according to the diameter of the connection hole, and then the wooden member 11 and the drill are moved relative to each other in a first direction while rotating the drill. As a result, the connection hole 12 extending from the connection surface 11a in the first direction is formed in the wooden member 11.

Next, a through hole forming process is performed to form a through hole 14 in the wooden member 11 (step S102). In the through hole forming process, the side surface 11b of the wooden member 11 is aligned with a woodworking drill according to the diameter of the through hole, and then the drill is rotated while moving the wooden member 11 and the drill relative to each other in the second direction. By performing such drilling work at the formation position of each through hole 14, the through holes 14 extending from the side surface 11b in the second direction are formed in various places on the wooden member 11. By performing these connection hole forming process and through hole forming process, a wooden member 11 to which the above-mentioned connection structure can be applied is manufactured. In addition, by forming a connection hole 12 with a large diameter, i.e., a connection hole 12 that imposes a large processing load on the wooden member 11 in advance, deformation of the wooden member 11 due to the formation of the connection hole 12 is less likely to occur in the vicinity of the communication between the connection hole 12 and the through hole 14.

Next, the injection hole forming process is performed (step S103). In the injection hole forming process, the side surface 11b of the wooden member 11 is aligned with a woodworking drill according to the diameter of the injection hole 17, and then the drill is moved relative to the wooden member 11 in the second direction while rotating. This forms an injection hole 17 in the wooden member 11 that extends from the side surface 11b in the second direction. The injection hole forming process may be performed prior to the communication hole forming process.

Next, an insert material placement process (step S104) is performed in which the insert material 15 is press-fitted into each of the communication holes 14 of the wooden member 11. In the insert material placement process, the communication holes 14 and the insert material 15 are aligned, and then the insert material 15 is press-fitted into the communication holes 14 using a hammer or the like.

As shown in FIG. 6, the insert 15 pressed into the communication hole 14 does not protrude from the side surface 11b, and a portion of it is disposed within the connection hole 12 at the communication portion between the connection hole 12 and the communication hole 14.

Next, a rod-shaped material insertion process (step S105) is performed in which the rod-shaped material 13 is inserted into the connection hole 12 of one of the wooden members 11. In the rod-shaped material insertion process, the rod-shaped material 13 is inserted to a predetermined position in the connection hole 12. By performing the insert material arrangement process prior to the rod-shaped material insertion process, it is possible to prevent the insert material 15 from being unable to be inserted due to construction errors. It is also possible to prevent damage to the rod-shaped material 13 caused by contact when the insert material 15 is pressed in.

Next, a cement filling process (step S106) is performed to fill the gap between the rod 13 and the connection hole 12 of the wooden member 11 with cement, such as mortar. In the cement filling process, cement is injected from the opening of the connection hole 12 on the connection surface 11a and the opening of the injection hole 17 on the side surface 11b. The cement is injected so as to spread throughout the entire connection hole 12.

As shown in Figures 7 and 8, the injected cement hardens to form the cement-based filler 16. The cement-based filler 16 connects the rod-shaped material 13 and a part of the insert material 15 located in the connection hole 12, integrating the rod-shaped material 13 and the insert material 15.

The above-mentioned series of steps may all be performed at the construction site, or may all be performed at a location other than the construction site, such as a factory. Also, the wooden member 11 that has undergone the connection hole formation process and the communication hole formation process may be transported to the construction site, and the remaining steps may be performed at the construction site.

Next, a connection process (step S107) is performed in which the rod-shaped material 13 provided on the wooden member 11 as described above is used to connect the wooden member 11 to another member. In the connection process, the portion of the rod-shaped material 13 that protrudes from the connection surface 11a is connected to the other member 20.

In the above-mentioned connection structure, when a pull-out load is applied, the pull-out load is transmitted to the wooden member 11 via the rod-shaped member 13 and the cement-based filler 16, and via the rod-shaped member 13, the cement-based filler 16, and the insert member 15. Therefore, in the connection structure, the pull-out load can be countered not only by the frictional force between the wooden member 11 and the cement-based filler 16, but also by the bearing pressure of the wooden member 11 in the portion where the insert member 15 is arranged.

The effects of this embodiment will be described.
(1) According to the above-described connection structure, the pull-out load is resisted not only by the frictional force between the wooden member 11 and the cement-based filler 16 but also by the supporting pressure of the wooden member 11, so that the anchorage length of the rod-shaped material 13 can be reduced.

(2) In the above-mentioned connection structure, cement is filled into the connection hole 12. This allows costs to be reduced compared to epoxy-based adhesives and makes it easier to meet the fire resistance required for buildings.

(3) In the above-mentioned connection structure, it is only necessary to form the connection hole 12 extending in the first direction and the communication hole 14 extending in the second direction in the wooden member 11. In other words, there is no need to subject the wooden member 11 to complex processing using special tools, such as forming irregularities on the inner surface of each hole. As a result, it is possible to reduce the fixing length of the rod-shaped material 13 while maintaining the ease of processing the wooden member 11.

(4) In the above-described connection structure, the communication holes 14 are provided on both sides of the connection hole 12. This allows the pull-out load to be applied to the wood members 11 in an effectively distributed manner.
This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

As shown in FIG. 9, the diameter of the communication hole may be made larger than the diameter of the insert 15, so that the cement-based filler 16 is formed around the insert 15. In such a configuration, it is preferable that the communication hole 14 has a press-in portion 14a formed on the back side of the communication portion with the connection hole 12, into which the insert 15 can be press-fitted, as a configuration for temporarily supporting the insert 15. This allows the cement-based filler 16 to be easily formed around the insert 15.

- As shown in FIG. 10, the restraining material placed in the communication hole 14 may be made of a material stronger than the wooden member 11, and may be made of a cement-based filler 16. In this configuration, no insert material 15 is placed in the communication hole 14, and cement is injected into the connection hole 12. In other words, the rod-shaped material insertion process (step S105) and subsequent processes are performed without performing the insert material placement process (step S104).

The insert may be made of any material that is stronger than the wood member 11, such as ceramic.
As shown in Fig. 11, the insert 18 may be provided so as to penetrate the cement-based filler 16. In such a configuration, the communication hole 14 is formed so as to penetrate the connection hole 12. Also, a screw or the like may be used as the insert 18. In this case, the communication hole 14 is formed as a pilot hole for the screw.

- The wooden member 11 may be connected to another member 20 using one or more rod-shaped materials 13. Also, depending on the positional relationship between the connection holes 12 and the communication holes 14, the communication holes 14 corresponding to different connection holes 12 may be configured as a single hole.

- In the above-mentioned connection structure, the rod-shaped material 13 and the insert material 15 need only be integrated with the cement-based filler 16. Therefore, when connecting wooden members 11 together, the rod-shaped material 13 may be placed in each other's connection holes 12 before cement is injected.

The above-mentioned connection structure may be one that connects the wooden member 11 to the other member 20 using the rod-shaped material 13. Therefore, the other member 20 may be, for example, a wooden member to which the protruding portion of the rod-shaped material 13 is connected using a connection structure similar to that of the wooden member 11, or a metal member to which the protruding portion of the rod-shaped material 13 is connected using welding or the like. The other member 20 may also be a cement-based member in which cement is poured so as to include the protruding portion of the rod-shaped material 13. The other member 20 may also be a reinforced concrete (RC) material or a prestressed concrete (PC) material.

11...wooden member, 11a...connection surface, 11b...side surface, 12...connection hole, 13...rod-shaped member, 14...communicating hole, 14a...press-fit portion, 15...insertion member, 16...cement-based filler, 17...injection hole, 18...insertion member, 20...other members.

Claims (6)

A connection structure for connection in a first direction,
a wood member having a connection hole formed in the first direction and a communication hole formed in a second direction intersecting the first direction, one end of which is open to the outside and the other end of which is connected to the connection hole;
A rod-shaped member inserted into the connection hole;
a restraining member provided in the communication hole and configured to restrain the movement of the rod-shaped member in the first direction;
A cement-based filler is filled in the connection hole ,
One of the restraining members is accommodated in one of the communication holes,
A portion of the one restraining member is disposed in the connection hole so as to pass through the side of the rod-shaped member.
Connection structure. The connection structure according to claim 1 , wherein the restraint material is a cement-based filler that extends in the second direction, has only one end open to the outside, and has the other end filled into the communication hole that communicates with the connection hole . The connection structure according to claim 1 , wherein the restraining member is an insert member that is inserted into the communication hole. The connection structure according to claim 3 , wherein the restraint material extends in the second direction, only one end of the restraint material is open to the outside, and the other end of the restraint material has a cement-based filler filled in the communicating hole that communicates with the connection hole . A connection method for connecting in a first direction,
forming a connection hole formed in the first direction and a communication hole formed in a second direction intersecting the first direction, one end of which is open to the outside and the other end of which is connected to the connection hole in the wood member;
inserting a rod-shaped member into the connection hole;
providing a restraining member in the communication hole to restrain the movement of the rod-shaped member in the first direction;
and filling the connection hole with a cement-based filler .
In the step of forming the connection hole and the communication hole in the wooden member, the communication hole is formed at a position that passes beside the connection hole and overlaps a part of the connection hole when the wooden member is viewed from the second direction,
In the step of providing the restraining material in the communication hole, one of the restraining materials is accommodated in one of the communication holes, and a part of the one of the restraining materials is disposed so as to pass through the side of the rod-shaped material in the connection hole.
How to connect: A wood member connected in a first direction,
a connection hole formed in the first direction, into which a rod-shaped material is inserted and into which a cement-based filler is filled after the rod-shaped material is inserted;
a communication hole formed in a second direction intersecting the first direction, one end of which is open to the outside and the other end of which is connected to the connection hole, and in which a restraining member is disposed to restrain the movement of the rod-shaped material in the first direction,
the communication hole is formed at a position that passes beside the connection hole and overlaps a portion of the connection hole when the wood member is viewed from the second direction,
One of the restraining members is accommodated in one of the communication holes, and a part of the one restraining member is disposed in the connection hole so as to pass through the side of the rod-shaped member.
Wood materials.