JP2963838B2 - Joining fittings for wooden construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fitting used for a wooden building.

[0002]

2. Description of the Related Art A unique joining method is used for assembling a structural material of a wooden building, and a high level of skill is generally required. Therefore, recently, a joining method using metal fittings has been frequently used for the purpose of simplifying the conventional assembling work and improving workability. The shape of the joining metal fittings has also become more complicated, and the materials used for these are mainly rolled materials and sheet metal welded materials.

[0003] For example, Japanese Patent Application Laid-Open No. 5-295799
In the structure in which the small portion of the other columnar cross member is brought into contact with the joint surface of the columnar receiving member to fix both members,
There is disclosed a plate-shaped joint fitting for fitting and fixing one end into a receiving member, the other end protruding from a joint surface, and fitting and fixing another cross member to the protruding portion.

[0004]

The material used for these metal fittings is generally used by cutting a rolled material with a shear or the like or after welding and assembling it into a predetermined shape. is there. For example, a joint fitting as shown in FIG. 4 has been used. FIG. 4A is a front view of the joining fitting, and FIG.
Shows a side view. This is a welded assembly composed of the materials of the plate 1, the receiving metal 5a, and the locking portion 6. Since the receiving metal 5a and the locking part 6 are welded and assembled to the projections 5 provided at the side end portions of the plate 1, distortion or the like due to heat is generated, the accuracy of the joining metal fitting is deteriorated, and the fitting hole of the receiving member is formed. May not be inserted properly. In addition, the reliability of quality may be reduced due to the occurrence of defective welding during welding work.

[0005] In addition, since the thickness of the metal plate cut from the rolled material is constant, it is difficult to change the optimum shape and the thickness of the plate according to the load applied to the metal plate. Therefore, by determining the wall thickness with the maximum stress portion, the design becomes excessive, the weight becomes heavy, and the handling becomes inconvenient. In order to approach the optimum shape, welding assembly is necessary, but not only an extra welding operation is required, but also it is difficult to create a shape such as a curved surface change.

Further, since the plate material cut with a shear or the like has a sharp cross-sectional corner portion, dents are likely to be formed during the manufacture of the bracket, and the burrs generated by the dents fit the bracket and the cross member. This can cause interference when fixing the work, and also reduces workability.

[0007] The present invention eliminates welding work by improving the reliability of quality by manufacturing the metal fittings from a one-piece metal product, while reducing the weight with an optimal shape according to the design load. An object of the present invention is to provide a joining metal fitting which can simplify the operation of assembling a receiving member and a cross member via a joining metal fitting and can improve workability.

[0008]

SUMMARY OF THE INVENTION The present inventors have reexamined the basic conditions required for a metal joint and have focused on producing a metal joint having a strong strength and an integral structure which does not require welding. . The parts that do not require strength were made thinner or perforated to reduce the weight. Furthermore, by providing a gripping structure, the handling is simplified, and the interference situation during the assembling work is analyzed and improved, thereby inventing the joint fitting of the present invention.

First, a joint fitting according to the present invention has a structure in which an edge of another columnar cross member is brought into contact with a joint surface of a columnar receiving member to fix both members, and a bolt is dropped to one end of a plate. Hook, a bolt through hole adjacent to the hook, at least one projection provided at the other end of the plate, and a flange-like engagement at the tip of the projection. It is a joining metal fitting for wooden buildings characterized by being made of a metal casting or a forged product having a portion.

[0010] The material is an iron casting. When strength and a thin portion are required, it is preferable to use a spheroidal graphite cast iron material.

The plate is provided with a hole into which at least a finger can be inserted. Desirably, the size of the hole through which two or more fingers can be inserted is preferable.

Further, a recess is provided at a position corresponding to the hole below the hook. It is preferable to have a concave shape to which the abdomen of the thumb can be applied.

Further, the inside of the plate is made thinner than the thickness around the plate.

Further, at least a part of the cross section around the plate is rounded. It is preferable to provide roundness in the cross section around the entire periphery of the plate. Instead of roundness, a shape with a chamfer may be used.

A chamfer is provided at a lower portion and / or a side surface of the flange-shaped locking portion. The shape may be rounded.

[0016]

A description will now be given, with reference to FIG. The insertion hole 15 is previously provided at a predetermined position of the columnar receiving member 14.
Is provided. The projections 5 protruding from the side surface of the plate 1 and the locking portions 6 are fitted into the insertion holes 15 to fix the joining fitting.

The projection 5 functions to project and hold the plate 1 at a predetermined position on the side surface of the receiving member 14. Further, the cross member 16 has a strength and a size for supporting the load.

The locking portion 6 fits into the insertion hole 15 of the receiving member 14 and prevents the plate 1 from being detached from the receiving member 14 via the projection 5.

Next, in the cross member 16, the groove 1 is
8 and bolt through holes 21 and 22 are formed in advance,
A bolt is inserted into the bolt hole 21. Next, the groove 18 formed in the cross member 16 is dropped from above the plate 1 so as to be fitted to the hook 3 provided with the bolt drop-in engagement groove 2.

The engaging groove 2 guides the cross member 16 to a predetermined position via a bolt inserted into the bolt through hole 21.
Determine the position in up, down, left and right directions.

The hook 3 is connected to the cross member 16 via a bolt.
To prevent it from falling off from the joint fitting. After the predetermined positioning is completed, the bolt through hole 4 near the lower portion of the hook 3 and the corresponding bolt through hole 22 of the cross member 16 are inserted and fixed with bolts.

The bolt through hole 4 prevents the cross member 16 from being detached upward through the bolt.

The plate 1, the hook 3, the projection 5, and the locking portion 6 are of an integral structure and are made of spheroidal graphite cast iron.
High reliability in dimensional accuracy and quality due to no welding. When the complicated shape required by design is manufactured integrally, pursuing weight reduction, and furthermore, in addition to the strength of the material, a thin part is required,
It is most suitable to employ a spheroidal graphite cast iron material having excellent fluidity of the molten metal. In addition, since the specific gravity of the spheroidal graphite cast iron is 8% lighter than that of the cast steel, when the shape and the strength are the same, the spheroidal graphite cast iron can reduce the weight by 8%.

The hole 7 near the center of the plate 1 makes it easy for an operator to grip during the assembly operation. In the assembly work of the wooden building, the joining fitting is installed by fitting the projection 5 and the flange-shaped locking portion 6 provided on the plate 1 into the insertion hole 15 opened at a predetermined position of the columnar receiving member 14. You. At this time, the operator holds the joint fitting in one hand, inserts the protrusion 5 and the locking portion 6 into the insertion hole 15, and presses the joint with the hammer held in the other hand.
By fitting the upper end surface 9a of the boss 1, it is fitted. At this time, the operator can securely and stably hold the joining fitting by inserting his / her finger into the hole 7 and applying the abdomen of the thumb to the recess 8 provided below the hook 3. In addition, by adopting this gripping structure, normal handling and carrying work are easy and can be performed safely. Further, the holes 7 and the recesses 8 provided in the plate 1 contribute to the reduction of the weight of the joining fitting.

A predetermined thickness is held around the plate 1 and the inside 10 is made thin. By providing the inner side 10 with a thin structure in an integrated structure according to the design conditions, the weight can be reduced and the handling is easy.

The plate 1 is provided with a rounded corner 11 at the peripheral cross section. When the operator inserts and fits the projection 5 of the joint fitting and the locking portion 6 into the insertion hole 15 of the columnar receiving member 14, the upper end surface 9a of the plate 1 is hammered. At this time,
By providing roundness at the corner 11 of the peripheral cross section of the g 1, even if there is a dent or a burr, the assembling work can be reliably performed without interference. Instead of roundness, a chamfer that can respond to the size of a dent or a burr may be provided.

The lower part 12 of the flange-shaped locking part 6 and / or
Alternatively, an assembly guide chamfer is provided on the side surface 13. When the worker inserts and fits the locking portion 6 of the joining metal fitting into the insertion hole 15 of the columnar receiving member 14, the lower portion 12 and / or the side surface 13 of the locking portion 6 is provided with an assembling guide chamfer. Even if there are dents or burrs, there is no interference and the assembly work can be performed reliably. Instead of chamfering, a roundness corresponding to the size of a dent or a burr may be provided.

[0028]

FIG. 1 shows an embodiment of the present invention, and FIG.
1 shows a front view thereof, and FIG. 1B shows a cross-sectional view taken along a line AA. At the side end of the plate 1 forming the main body of the joint fitting,
A hook 3 having an engaging groove 2 for dropping a bolt, a bolt hole 4 near the lower portion of the hook 3, and a projection 5 at the side end opposite to the hook 3 are provided. Further, the protrusion 5
A flange-shaped locking portion 6 is provided at the tip of
To the locking portion 6 are formed in an integral structure. Plate 1
Has a thickness of 5.7 mm. When assembling the cross member 16 to the columnar receiving member 14, the bolts 19 are inserted into the cross member 16 in advance so that the bolts 19 are easily fitted into the bolt engaging grooves 2 of the plate 1. The dropping engagement groove 2 is formed by expanding the opening side into a V-shape.

In the vicinity of the center of the plate 1, a hole 7 for holding is provided. The shape of the hole 7 is such that the index finger, the middle finger, and the ring finger can be inserted in the hole 7 in a line. Further, a recess 8 is provided below the hook 3 at a position corresponding to the hole 7 for gripping so that the abdomen of the thumb can be applied.

The periphery 9 of the plate 1 has a thickness of 5.7 mm, the inside 10 has a thickness of 3 mm, and both sides of the inside 10 have a plate.
The lower surface is one step lower than both surfaces of the periphery 9 of the gate 1.

The peripheral corner 11 of the plate 1 is provided with a roundness of R 2.85 mm all around.

At the lower portion 12 of the flange-shaped locking portion 6 and on both sides of the side surface 13, an assembling guide chamfer is provided at an angle of 45 degrees.

FIG. 2 shows an example in which three cross members 16 are fitted to one columnar receiving member 14 using the joint fitting of one embodiment of the present invention. FIG. 3 is a view showing details of an assembly structure of the receiving member 14 and the cross member 16 according to the embodiment of the present invention. First, an insertion hole 15 is provided in a predetermined position of the receiving member 14 in advance. Next, the operator inserts his / her finger through the hole 7 of the joint fitting, puts the abdomen of the thumb on the recess 8 provided in the lower part of the hook 3 and holds the joint fitting, and inserts the projection 5 and the locking part 6 into the insertion hole 15. insert. The operator holds the joining fitting with one hand and drives the upper end face 9a of the plate 1 with a hammer held in the other hand to fit the locking portion 6. On the other hand, in the cross member 16, the groove 18 and the bolt hole 2
The bolts 1 and 22 are formed, and the bolts are inserted through the bolt holes 21. Next, the groove 18 formed in the cross member 16 is dropped from above the plate 1 so as to be fitted to the hook 3 provided with the bolt drop-in engagement groove 2. Next, the bolt through hole 4 opened in the vicinity of the lower part of the hook 3 and the bolt through hole 22 previously opened in the cross member 16 are inserted and fixed with bolts 20 to complete the assembly.

Since the metal joint of the present invention is manufactured by an integral structure made of spheroidal graphite cast iron, the dimensional accuracy is good, and the fitting of the receiving member 14 into the insertion hole 15 is good. Further, the lower portion 12 of the locking portion 6
And the side surface 13 is provided with an assembly guide chamfer,
Work is simple. In addition, since the holding hole 7 and the recess 8 are provided in the plate 1, the joining fitting can be reliably and stably held. Further, the holding holes 7 and the recesses 8 reduce the weight of the joining fitting. On the other hand, inside 1 of plate 1
The contact area when fitting the plate 1 to the groove 18 of the cross member 16 can be reduced because the thickness of the plate 1 is small.
Easy assembly work. Furthermore, weight is reduced.
Further, since the peripheral corner 11 of the plate 1 is rounded, the upper end surface 9a of the plate 1 is hammered when the worker inserts and engages the locking portion 6 with the receiving member 14. The groove 18 opened in the cross member 16 is
There is no interference at the time of fitting, and the assembling work can be reliably performed. Further, since the gripping hole is also rounded, the feel to the palm is good.

As described above, a joint fitting made of spheroidal graphite cast iron having an integral structure, the holding hole 7, the recess 8, the thin inside 10, the roundness of the peripheral section corner 11, and the locking section 6 of the plate 1 are provided. The product weight can be reduced from 1.2 kg to 0.9 kg by providing an assembly guide chamfer on the
As a result, the weight can be reduced by as much as 25%, and a further significant improvement in assembling workability can be achieved.

[0036]

According to the present invention, since the joint fitting of the present invention is used for assembling a wooden building, since it is a casting having an integral structure, the welding work at the time of manufacturing the fitting can be eliminated. Further, the design conditions are satisfied, and the weight can be reduced. Further, the operability of assembly can be greatly improved by adopting a hole or dent for gripping, a thin portion, a rounded corner at a cross section, and a chamfer for assembling guide.

[Brief description of the drawings]

FIG. 1A is a front view of an embodiment of a joint fitting, and FIG. 1B is a cross-sectional view taken along a line AA.

FIG. 2 is a perspective view showing an embodiment of assembling a receiving member and a cross member.

3A is a front view of a detailed assembly member, and FIG. 3B is a plan view thereof.

FIG. 4A is a front view of a conventional joining fitting. (B) is the side view.

[Explanation of symbols]

1: Plate 2: Engagement groove
3: Hook 4: Bolt through hole 5: Projection
6: locking part 7: hole 8: dent
9: Peripheral 10: Inside 11: Corner section
12: lower part 13: side surface 14: receiving member
16: Cross member 18: Groove 19, 20: Bolt 2
1, 22: bolt through hole

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masao Kato 169-1 Arashima-cho, Yasugi-shi, Shimane Kato Sangyo Co., Ltd. (56) References JP-A-7-224467 (JP, A) JP-A-7-54097 (JP, A) JP-A-5-295799 (JP, A) JP-A-6-37402 (JP, U) JP-A-4-20503 (JP, U) JP-A-7-10111 (JP, U) Kaihei 3-84302 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1/58 508 E04B 1/26

Claims (7)

(57) [Claims] 1. A hook having a bolt engaging groove at one end of a plate, a bolt through hole adjacent to the hook, and at least one bolt provided at the other end of the plate. 1
A metal fitting for a wooden building, comprising a metal casting or a forged product having the above-mentioned projection and a flange-shaped locking portion at the tip of the projection. 2. The metal fitting according to claim 1, wherein the metal casting is an iron-based casting. 3. The metal fitting for a wooden building according to claim 1, wherein the plate is provided with a hole into which at least a finger can be inserted. 4. The metal fitting for a wooden building according to claim 1, wherein a recess is provided at a position corresponding to the hole at a lower portion of the hook. 5. The metal fitting for a wooden building according to claim 1, wherein the inside of the plate is made thinner than the wall thickness around the plate. 6. The metal fitting according to claim 1, wherein at least a part of a peripheral cross section of the plate is rounded or chamfered. 7. The joining fitting for a wooden building according to claim 1, wherein a chamfer or roundness is provided on a lower portion and / or a side surface of the flange-shaped locking portion.