JPH0130509Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint structure for a crosspiece joint for civil engineering and construction.

Here, the civil engineering construction crosspiece joint is a crosspiece assembly formed by connecting at least one horizontal crosspiece and one vertical crosspiece at right angles or at an angle to each other, and is attached to the inside or outside of a building. It refers to things installed around building sites, parks, playgrounds, factories, etc., or along roads, rivers, etc., such as window rails, stair rails, balcony handrails, bridge handrails, etc. Handrails, window lattices, lattices, partition lattices, etc., pastures, farms, flower beds, lawns, roads, rivers,
This includes fences such as partitions or protective fences of ponds, lakes, etc., walls of building exteriors, hedges, etc.

In conventional joint structures, two members such as the horizontal frame and vertical frame are fixed using screws or rivets, but with this method, the cost of fixing members such as screws increases, and the fixing work is labor-intensive. , which was labor-intensive and costly.

Therefore, after the horizontal frame and the vertical frame are fitted and joined, a part of the horizontal frame is forcefully deformed to protrude into a flat shape, and this deformed protrusion is engaged with the receiving hole of the vertical frame to prevent the vertical frame from being pulled out. Fixation was suggested.

This caulking fixing method does not require any fixing members such as screws, so the material cost is low, and the fixing work does not require much time and effort, but the hard hitting causes considerable damage to the plating and painting of the relevant parts of the horizontal frame. This caused rust and corrosion of the joints.

Therefore, the purpose of this invention is to fit and fix the product without hitting the product surface at all, so there is no rust or corrosion of the joint due to damage to the plating or paint, and the joint strength is maintained high over a long period of time. It is an object of the present invention to provide a joining structure that does not require any fixing members, so the material cost is low, and the fixing work does not require much time and effort.

The joining structure of the present invention will be explained below using the reference numerals in the attached drawings. A notch 6 into which is fitted is provided, and the protruding base end portions 2b, 2b are provided at the inner bottom 6a of the notch 6.
A trapezoidal locking piece 2 having a longer distance between the ends than the length of the tip 2a is provided protrudingly through the narrow part 5, and the other member 3
, a receiving hole 4 is provided with both ends 4b, 4b bent in the same direction, and the length of the main body portion 4a of the receiving hole 4 is shorter than the distance between the protruding base ends 2b, 2b of the locking piece 2. Thus, when the other member 3 is fitted into the notch 6, the receiving hole edge 4c between the bent ends 4b, 4b
The locking piece 2 is fitted into the receiving hole 4 by elastically deforming one or both of the locking pieces 2, and the protruding proximal ends 2b, 2b of the locking piece 2, which have elastically returned after insertion, are inserted into the main body of the receiving hole. Both ends of the portion 4a are engaged with the inner surfaces of the receiving hole edges 4d, 4d.

In the illustrated embodiment, the locking piece 2 is easily fitted into the receiving hole 4, and the receiving hole edge 4c at the time of fitting is facilitated.
In order to avoid excessive elastic deformation of the locking piece 2, the length of the tip 2a of the locking piece 2 is approximately equal to the length of the main body portion 4a of the hole, and the bent end 4b of the hole 4 is 4b at the protruding base end 2 of the locking piece 2.
The bent ends 4b, 4b of the receiving hole are formed at an obtuse angle with respect to the main body portion 4a of the receiving hole.

Further, the locking piece 2 is prevented from moving along the main body portion 4a of the receiving hole after the insertion, and the protruding base end portion 2
In order to ensure engagement between the receiving hole edges 4d and 4d, the length of the receiving hole main portion 4a is reduced to the narrow width portion 5.
The width of the notch 6, that is, the distance between the inner wall surfaces 6b and 6c, is made approximately equal to the distance between the pair of side wall plate portions 3a and 3b of the member 3. The receiving hole 4 is bored in the side wall plate portion 3c between the pair of side wall plate portions 3a and 3b.

In this joining structure, while fitting the member 3 into the notch 6, the tip portion 2a of the locking piece 2 is inserted into the receiving hole main portion 4a.
When the member 1 is pressed toward the member 3 after being partially inserted into the member 3, the inclined side ends 2c, 2c of the trapezoidal locking piece 2
Since the inner wall surfaces of the receiving hole bent ends 4b, 4b formed obliquely with respect to the main body portion 4a mutually act as inclined cam surfaces, the receiving hole edge 4c and the locking piece 2
is elastically deformed inward, and the locking piece 2 passes through the receiving hole 4.

After this passage, as shown in FIG. 3 and FIG. Since the inner wall surface of the main body portion 4a comes into contact with the inner wall surface, movement of the member 1 along the length direction of the member 3 is prevented.

Further, as shown in FIGS. 4 and 5, the locking piece 2 elastically returns to its protruding base end portions 2b, 2.
b comes into contact with the inner surface of the receiving hole edge portions 4d, 4d, so that movement of the member 1 in a direction perpendicular to the member 3, that is, removal of the member 1 is prevented.

Furthermore, since the locking piece 2 is fitted into the receiving hole 4 and all or part of the member 3 is fitted into the notch 6, movement of the member 1 in the transverse direction of the member 3 is also prevented. Ru. In this way, member 1 and member 3 are connected to each other, and have sufficient joint strength for a frame structure such as a handrail.

In the illustrated embodiment, in order to increase the joint strength, the narrow portion 5 and the locking piece 2 are provided protrudingly on both of the pair of side wall plate portions 1a and 1b of the member 1. Two receiving holes 4 are provided in the side wall plate portion 3c of No. 3 at an interval equal to the distance between the side wall plate portions 1a and 1b of the member 1. In addition, in order to accurately prevent rainwater etc. from entering the inside of the member 1 and the member 3 from the space between the member 1 and the member 3 including the space between the locking piece 2 and the receiving hole 4, waterproof packing is used. or caulking may be applied to the area.

As described above, in the joining structure of the present invention, one member 1 is provided with a notch 6 into which all or part of the other member 3 is fitted, and the distance between the protruding proximal ends 2b, 2b is equal to that of the distal end 2a. A trapezoidal locking piece 2, which is longer than the length, is provided to protrude from the inner bottom 6a of the notch 6 through the narrow portion 5, and the length of the main body portion 4a is the length between the protruding base ends 2b, 2b of the locking piece. shorter than the distance and both ends 4
A receiving hole 4 in which b and 4b are bent in the same direction is provided in the other member 3, and all or part of the member 3 is inserted into the notch 6.
When fitting into the receiving hole 4, one or both of the receiving hole edge 4c and the locking piece 2 between the bent ends 4b, 4b are elastically deformed to fit the locking piece 2 into the receiving hole 4, and after fitting, the locking piece 2 is elastically deformed. The protruding base ends 2b, 2b of the restored locking piece 2 are engaged with the inner surfaces of the receiving hole edges 4d, 4d at both ends of the receiving hole main portion 4a, and unlike the conventional caulking fixing method, there is no need for joining operation. Since there is no need to hit the product surface, there is no damage to the plating or coating on the product surface exposed to the outside.

Since the locking piece 2 and the hole edge of the receiving hole 4 come into sliding contact with each other during the above-mentioned insertion operation, there may be some damage to the plating or painting, but after joining, the locking piece 2
is hidden in the member 3, and the edge of the receiving hole 4 is hidden in the member 1, so the locking piece 2 and the edge of the receiving hole 4 are protected against corrosion and aging due to spraying of rainwater, etc. protected. Therefore, according to this bonding structure, high bonding strength can be maintained over a long period of time.

In addition, material costs can be reduced because no separate fixing members such as screws or rivets are used, and since all the joining work is a simple insertion and insertion operation, the fastening work can be done easily with less labor, reducing joining costs. It is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of both members before they are joined, and FIG. 2 is a perspective view of the two members after they are joined. 3 is a sectional view taken along line A-A' in FIG. 2, FIG. 4 is a sectional view taken along line BB' in FIG. 2, and FIG. 5 is a sectional view taken along line C-C' in FIG. DESCRIPTION OF SYMBOLS 1... One member, 2... Locking piece, 2a... Locking piece tip end, 2b... Locking piece protruding base end, 3...
...Other member, 4... Receiving hole, 4a... Receiving hole main portion, 4b... Receiving hole bent end, 5... Narrow width part, 6...
...Notch.

Claims (1)

[Scope of utility model registration request] One member 1 of the two members 1 and 3 to be joined in a crosswise manner is provided with a notch 6 into which all or part of the other member 3 is fitted, and the inner bottom 6a of the notch 6 is
A trapezoidal locking piece 2 with a distance between the overhanging proximal ends 2b and 2b that is longer than the length of the distal end 2a is protruded through the narrow part 5, and the other member 3 has both end parts 4b and 4b.
A receiving hole 4 is provided which is bent in the same direction, and the length of the main body portion 4a of the receiving hole 4 is determined by
b, shorter than the distance between 2b, and the other member 3
When fitting into the notch 6, the bent end 4
The locking piece 2 is inserted into the receiving hole 4 by elastically deforming one or both of the receiving hole edge 4c and the locking piece 2 between b and 4b, and the protruding base end of the locking piece 2 is elastically restored after insertion. A joining structure of a crosspiece joint for civil engineering and construction, in which the portions 2b, 2b are engaged with the inner surfaces of the receiving hole edges 4d, 4d at both ends of the receiving hole main portion 4a.