JPS628407Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an angle joint fastening device for hollow shapes, etc., which can be widely used in joints of various products such as general construction and other products such as aluminum sashes, decorative shelves, handrails, and picture frames.

Various conventional devices of this kind have been provided, and generally, a joint member spanning both hollow shapes to be connected at an appropriate angle is inserted into the joint, and the respective shapes and the joint member are connected with screws or bolts. It is fixed by tightening from the surface of the molded material using methods such as the following. However, with the above structure, it is easy to cause misalignment between the shape material and the joint member when tightening bolts, etc., and it is difficult to finely adjust the connection fixing position between the two shape materials and the joint member. It has the fatal drawback that the joints are difficult to line up, such as a step on the surface of the joint and a gap between the joint surfaces of both molds, making it very unsightly.
Moreover, in order to maintain sufficient connection strength between the two sections, it is necessary to strongly tighten the bolts, etc. through washers, etc., and when the bolts, etc. are strongly tightened, the necks of the bolts are subject to torsional stress, tensile stress, and shear. Due to stress and the like, the bolts are likely to break or loosen, and the desired connection strength of the shape material cannot be maintained over time.

The object of the present invention is to provide an angle joint fastening device for a hollow profile member, etc., which eliminates the above-mentioned conventional drawbacks.

To explain the embodiment shown in FIG. 1, reference numerals 1 and 2 are hollow sections whose connecting ends are cut at an angle of 45 degrees. Support holes 3, 4, 5, and 6 are bored. Reference numerals 7 and 8 are L-shaped joint members made of a hard resin material, and the inner surface 7a of one of the joint members 7 and the inner surface 8a of the other joint member 8 are mutually joined. The joint members 7 and 8 have a chamfered portion or a relief surface at each corner, and the joint members 7 and 8 are connected to the hollow member 1, as shown in FIG. 2, a small diameter hole 9 that can be penetrated concentrically with the support holes 3, 4, 5, 6, and inner surfaces 7a, 8a of each joint member 7, 8, which are concentric with the small diameter hole 9. Both joint members 7 and 8 are each provided with a large-diameter hole 10 with an opening facing on the side.

Reference numeral 11 denotes a bush fitted into each of the small diameter holes 9 of the joint members 7, 8, and the bush 11 is provided at the lower part of the outer periphery as shown in FIGS. 8, 9 and other figures. A threaded portion 12 is formed, and an eccentric protruding portion 13 having a height of approximately the same width t as the wall thickness of the hollow shaped members 1 and 2 is formed at the upper end portion of the outer periphery that can protrude from the joint members 7 and 8, and A screw hole 14 is provided in the lower part of the inner periphery of the bush 11, and an opening 15 of a slightly larger diameter and concentric with the screw hole 14 is provided in the upper part of the inner periphery.
A pair of locking holes 16 and 17 for snap-spring pliers are bored at opposing positions on the upper end wall of 1.

Outer peripheral surface 13a of the above-mentioned bush eccentric protrusion 13
forms an eccentric curved surface with respect to the bush outer peripheral surface 18, and as shown in FIG. The outer peripheral surface 18 of the bushing is centered around the eccentric center point Q displaced by 1.
The outer circumferential surface shape of the eccentric protruding portion 13 is a circular arc curved surface that has a circular curve having approximately the same diameter as that of the eccentric protruding portion 13 . Same 1st
In FIG. 2, a circular curve a is the shape of the outer circumferential surface 18 of the bush centered on the center point O, and a circular curve b is the shape of the outer circumferential surface 1 of the eccentric protrusion 13 centered on the eccentric center point Q.
3a, and a circular curve c represented by an imaginary line shows the locus of movement of the outer circumferential surface 13a of the eccentric protrusion when the bush 11 is rotated around the center point O, and a circular curve d represents the trajectory of the movement of the outer circumferential surface 13a of the eccentric protruding portion when the bush 11 is rotated around the center point O. The outer peripheral surface 1 of the bushing is centered around a point P approximately midway between points O and Q (deviation amount m).
8 shows the shape of the inner circumferential surface of the support holes 3 to 6 of the hollow members 1 and 2, which are formed to be larger than the diameter of 8 by approximately the eccentricity 1. Incidentally, the eccentricity 1 of the eccentric protrusion 13
is determined to be approximately 0.4 to 0.5 mm in actual manufacturing, but it goes without saying that the magnitude of this eccentricity is not limited.

In addition, FIG. 13 shows the bush eccentric protrusion 13.
In this modification, the bush is centered around an eccentric center point S that is displaced by an appropriate eccentric amount n with respect to a center point R located on the center line of the bush outer peripheral surface 18, screw hole 14, etc. The outer circumferential surface shape of the eccentric protrusion 13 is a circular arc curved surface having a slightly larger diameter than the outer circumferential surface 18 . still,
The magnitude of the eccentricity n is approximately
Decide on approximately 0.4 to 0.5 mm. In Figure 13,
The circular curve e is the shape of the outer circumferential surface 18 of the bushing centered on the center point R, and the circular curve f is the shape of the outer circumferential surface 13a of the eccentric protrusion 13 centered on the eccentric center point S, and is represented by an imaginary line. A circular curve g indicates a movement locus of the outer circumferential surface 13a of the eccentric protrusion when the bush 11 is rotated about the center point R, and a circular curve h
is the eccentric protrusion 13 centered on the eccentric center point S.
The shape of the inner circumferential surface of the support holes 3 to 6 of the hollow members 1 and 2, which are formed into a perfect circular shape having approximately the same diameter as that of FIG.

That is, in the embodiment shown in FIG. 12 etc., since the outer circumferential surface 13a of the eccentric protruding portion of the bush 11 is formed into a slightly elliptical shape over the entire circumference, it takes some effort to form the eccentric portion. However, in the embodiment shown in FIG.
Since a is formed into a perfect circular shape, the molding process is easy, and the above-mentioned drawbacks are solved. The hatched areas indicated by symbols X and Y in FIGS. 12 and 13 represent the range in which the hollow sections 1 and 2 can be moved slightly by adjusting the rotation of the bush 11. In addition, the bush eccentric protrusion 13 in this case
Although the above two embodiments have been shown as examples, it goes without saying that any of the above embodiments may be adopted.

Furthermore, since the maximum eccentricity of the eccentric portions of each of the eccentric protrusions 13 is minute, about 0.4 to 0.5 mm, it is difficult to discover the eccentric position. The eccentric position of the bush 11 can be easily confirmed by carving a + sign on the holder and a - sign on a non-eccentric part opposite to the + sign.

Reference numeral 19 denotes a locking nut screwed onto the outer peripheral threaded portion 12 of the bush 11, and the locking nut 19 has an outer peripheral shape that can be loosely fitted into the large diameter hole 10 of the joint members 7, 8. A pair of locking holes 20 and 21 for the snap-spring pliers are bored in opposing positions of the wall of the locking nut 19. Reference numeral 22 denotes an inner surface 7a of the joint member 7 or 8 which is screwed into the central screw hole 14 of the bush 11 and has its tip 22a facing each other.
Alternatively, it is a set screw pressed by 8a.

In the above configuration, when connecting the pair of hollow members 1 and 2 at right angles, first, the bush 11 is fitted into each of the small diameter holes 9 of both the joint members 7 and 8 from the outer surface side, and the bush A pair of small protrusions of a snap-spring pliers (not shown) are inserted into the threaded portion 12 of the nut 11, and the nut 19 is tightened and screwed while being rotated.
The end surface of the locking nut 19 is brought into contact with the stepped end surface of the large diameter hole 10 of the joint members 7 and 8. In this state, the eccentric protrusion 13 of the bush 11 protrudes from the outer end surfaces of the hollow shapes 1 and 2, and the stepped lower edge circumference of the eccentric protrusion 13 extends over the small diameter of the joint members 7 and 8. Since the bush 11 is locked to the opening edge of the hole 9, the bush 11 is fixed in place.

Next, the pair of L-shaped joint members 7 and 8 to which the bush 11 and locking nut 19 are attached are attached to the inner surface 7.
A, 8a are joined to each other, and as shown in FIG.
The support holes 3 of the hollow shaped members 1 and 2 have bushing eccentric protrusions 13 which are fitted into the interiors of the hollow members 1 and 2 from the connecting end sides and protrude from the joint members 7 and 8, respectively, and which are formed in advance at opposing positions. After separating both the joint members 7 and 8 in order to fit them into the respective bushes 11
The stop screw 22 is screwed into the center screw hole 14 of the stop screw 22, and the stop screw 22 is strongly pressed against the inner surface 7a or 8a of the opposing joint member 7 or 8, respectively. Since the end surface of the nut 19 presses the stepped end surface of the large diameter hole 10 of the joint members 7, 8, both the joint members 7, 8 are pressed against the inner wall surfaces of the hollow sections 1, 2 facing each other, The mold members 1 and 2 are firmly connected.

In this state, 45 of the hollow shapes 1 and 2
If the connecting ends that are cut at the same time are in an accurate butt-joined state, it is sufficient to maintain this state, but due to errors in drilling the support holes 3 to 6 of the hollow sections 1 and 2, etc. If the connecting ends of both the hollow sections 1 and 2 are not in an accurate butt-joined state for some reason, loosen the set screw 22 a little and use snap-spring pliers (not shown) to remove the pair of small pieces. The protrusions are inserted into both locking holes 1 of the bush 11.
6, 17, and the bush 11 is rotated by an arbitrary angle in the range of 0 to 180 degrees. Butsuyu 11
When the bush 11 rotates around the center point O or R as shown in FIGS. 12 and 13, the eccentric protrusion 13 of the bush 11 follows the circular curve c or g, and the difference from the circular curve d or h representing the shape of the inner circumferential surface of the support holes 3 to 6 of the hollow sections 1 and 2 (the eccentric movement can be adjusted as indicated by the diagonal lines of the arrows X and Y). The rotation of the eccentric protrusion 13 presses the inner circumferential surfaces of the support holes 3 to 6 that come into contact with the eccentric protrusion 13. , the hollow shaped member 1 or 2 moves slightly in the direction of the connecting ends, etc., and an accurate butt-joined state of the connecting ends can be obtained. Incidentally, the bush 11 is connected to the joint members 7 and 8.
When fitting into the small diameter hole 9, it is necessary to install the hollow sections 1 and 2 in advance so that the eccentric protrusion 13 is located in the direction opposite to the connecting direction of the hollow sections 1 and 2.

After the connecting ends of the hollow sections 1 and 2 are accurately joined by fine adjustment by the eccentric protrusion 13 of the bush 11, the two sections 1 and 2 are brought into an accurate abutting state by firmly tightening the set screw 22. It will remain securely fixed.

Afterwards, if it is necessary to maintain the aesthetic appearance of the portion of the bushing 11 exposed on the surfaces of the two sections 1 and 2, a cap 23 may be attached to the head of the bushing 11 as shown in FIG. As shown in FIG. 10, the opening 15 of the bush 11 may be filled with a caulking material 24. In this case, the cap 23 and the caulking material 24 maintain the aesthetic appearance and also function to prevent rainwater from flowing in.

The set screws 22 are not limited to those used in each embodiment, and it goes without saying that any screws or bolts such as hexagonal bolts or hexagonal socket bolts may be used.

Although the above embodiments are for right angle joints, the device of the present invention is not limited to the case of right angle joints.
It can be used in an acute angle joint structure as shown in the figure, or as a third
It can also be used in an obtuse joint structure as shown in the figure. In these cases, it is necessary to bend and mold both the joint members 7 and 8 at an angle that matches the cutting angle of the connecting ends of the hollow sections 1 and 2.

Since the present invention has the above-described configuration, it exhibits various excellent effects as described below.

a. An eccentric protrusion is formed on the upper end of the outer periphery of the bush, and by the rotational pressing action of the eccentric protrusion, the connection position of the hollow sections to be connected at an appropriate angle can be slightly adjusted. Even if there is a drilling error in the support hole, it is possible to reliably and easily obtain an accurate butt-joined state between the connecting ends of both hollow shapes. Therefore, no steps or gaps are created at the joints of the connecting joints of the hollow sections, and even when a bushing is attached to a joint member, the eccentric protrusion of the bushing is locked to the open end surface of the joint member, making it easy to attach the bushing to the joint member. It has the feature of being able to fix the bushings in a fixed position, and when assembling the proposed device, it does not require any skill at all, and it can be assembled accurately with very simple work, and at the same time, it ensures that the shape materials are aligned neatly. The eccentric protrusion fits into the support hole of the hollow profile and functions like a bolt head, which prevents the mounting position of the hollow profile from shifting over time. Moreover, since the head of the screw attached to the bush does not protrude from the surface of the profile, it is safe and looks good.

b. When the set screw screwed into the central threaded hole of the bush is tightened and the opposing inner surfaces of both joint members are pressed with the tip of the screw, both joints are closed by the reaction pressure generated on the set nut screwed into the lower outer periphery of the bush. The members are separated and pushed apart, and the outer surfaces of the pair of joint members come into surface contact with the inner wall surface of the hollow profile member and press strongly against each other, so the frictional resistance between the contact surfaces increases significantly. Since a reaction force in the compression direction is constantly applied to the tip of each set screw, a frictional force is generated in the threaded portion between the set screw and the bushing screw hole. Therefore, each set screw does not require any loosening prevention member such as a washer, and will never loosen, fully exhibiting the required loosening prevention function, and each set screw etc. can secure both hollow shapes. Once they are connected, they are extremely firmly connected by the frictional forces mentioned above, and each set screw does not need to be tightened very strongly, so there is no risk of the set screw being damaged.

c The pair of L-shaped joint members need only have a shape that allows them to be inserted into the hollow member and press their respective outer surfaces against the inner wall surface of the hollow member, so the joint member itself does not need to have a very precise shape. Moreover, since both joint members are separated and spread apart by tightening each set screw, it is possible to have some flexibility in the shape and size of the joint members.
Coupled with the above-mentioned effect (a), it is very easy to manufacture the hollow shaped material, the joint member, etc., and some manufacturing errors in each component can be tolerated.

d It is desirable that the joint member be made of a hard resin material, etc. in order to increase the frictional resistance between the inner wall surfaces of the hollow member, but the material is not limited to this material.
Further, even when the joint member is made of a hard resin material, since it is fitted inside the hollow member, it is possible to prevent deformation and deterioration over time due to the inherent weak light property of the resin.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a main part showing an embodiment of the present invention, FIGS. 2 and 3 are partial longitudinal front views showing a modified embodiment of the invention, and FIG. 4 is a main part of the main part of FIG. 1. An enlarged view, FIG. 5 is a plan view of the same, FIG. 6 is a perspective view of both joint members according to the present invention joined together, and FIG.
8 is a plan view of the bushing according to the present invention, FIG. 9 is a front view of the bushing, FIG. 10 is an enlarged view of main parts showing a modification of FIG. 4, and FIG. 1
Figure 1 is a partially longitudinal front view showing the assembly stage of the proposed device, Figure 12 is an explanatory diagram showing the relationship between the eccentric protrusion of the bushing and the support hole of the hollow profile, and Figure 13 is a modification of Figure 12. An explanatory diagram showing the embodiment, FIG. 14 is a plan view of the main part showing a modified embodiment of FIG. 5 based on the embodiment of FIG. 13, and FIG.
16 is a plan view showing a modified embodiment of the bush based on the embodiment shown in FIG. 13, and FIG. 17 is a front view of the same bush. 1 and 2 are hollow members, 3, 4, 5, and 6 are support holes, 7 and 8 are joint members, 9 is a small diameter hole, 10 is a large diameter hole, 11 is a bush, 12 is a threaded portion, and 13 is a Eccentric protrusion, 14 is a screw hole, 15 is an opening, 19
is a stop nut, and 22 is a stop screw.

Claims (1)

[Scope of utility model registration request] At each extension part of a pair of joint members that can be inserted across the inside of a pair of hollow shapes whose connecting ends are to be connected at an arbitrary angle, a locking nut that can be press-contacted to the inner side of the joint member is attached at the lower part of the outer periphery. A bush to be screwed is fitted, an eccentric protrusion is formed on the upper end of the outer periphery of the bush that protrudes from the outer surface of the joint member, and the eccentric protrusion is inserted into the support hole of the mold material,
By pressing the tip of a set screw screwed into the central threaded hole of the bush against the opposing inner surfaces of the joint members, both of the joint members were brought into pressure contact with the inner wall surfaces of the hollow members facing each other. An angle joint fastening device for hollow profiled materials.