JP2015227668A - Frame member connecting metal fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure in which a frame member connecting metal fitting inserted into a metal fitting insertion hole of one frame member is hardly pulled out or hardly rotated due to subsequent vibration and the like.SOLUTION: This invention relates to a frame member connecting metal fitting 10 where a pair of protrusions 15 are oppositely formed at the upper part of a main segment 11 of substantially columnar shape. Although the protrusions under their normal state each have an outer surface 15b protruded outward from the outer surface of the main segment, they are inserted into metal fitting insertion holes 25 and 26 of an upper frame 20 under a state in which they are compressed and deformed by their own resiliency and press contacted with the inner surfaces, thereby even if a fine vibration or the like acts against them, they may not be easily pulled off or dropped or rotated from their once set positions. If they are set at their prescribed positions and orientations into the metal fitting insertion holes of the upper frame member at a factory in advance, it is possible to eliminate manual work at a site. Since the extending direction of each of the protrusions is substantially coincided with an axial center direction of a female thread 14a, its visual seeing makes it easy to perform an axial alignment of the frame member connecting metal fittings inserted into the metal fitting insertion holes.

Description

The present invention relates to a frame connecting bracket used for connecting frame members (for example, a vertical frame and a horizontal frame) in an orthogonal state.

For example, in order to form an opening frame such as a door frame, it is necessary to connect the frame members in an orthogonal state. Conventionally, however, a frame connecting bracket as shown in Patent Documents 1 and 2 below is used together with a mounting screw. The members were connected to each other. The frame connecting bracket includes a columnar member having a through hole extending perpendicular to the axial direction, and a nut member provided concentrically in the through hole of the columnar member. One frame member (for example, the upper frame) to be connected is previously formed with a screw insertion hole extending in the longitudinal direction from its end face, and a metal fitting insertion hole is formed from its upper surface so as to be orthogonal to the screw insertion hole. A screw insertion hole is formed so as to align with the first hole in the joining region with the upper frame end surface of the frame member (for example, vertical frame). Then, at the site, the frame connecting metal fitting in which the plate-like nut member is inserted into the cylindrical member is inserted from the metal fitting insertion hole of the upper frame and arranged at a position intersecting with the screw insertion hole, and the cylindrical member is inserted at this position. Rotate appropriately so that the direction of the plate nut member is approximately aligned with the screw insertion hole, penetrate through the screw insertion hole of the vertical frame placed at a predetermined position with respect to the upper frame, and further, the screw insertion hole of the upper frame And the vertical frame and the upper frame are coupled by screwing into a plate-like nut member accommodated in a predetermined direction at the intersection of the metal fitting insertion hole and the screw insertion hole.

According to such a conventional technique, the orientation (axial center) of the plate-shaped nut member of the frame connecting bracket inserted at the intersection of the screw insertion hole and the bracket insertion hole of the upper frame is the axis of the screw insertion hole of the upper frame (accordingly, The cylindrical member is approximately the same as or slightly smaller than the inner diameter of the bracket insertion hole, even if there is a slight angular shift without exactly matching the axis of the mounting screw inserted into the screw insertion hole. Since it is formed to have an outer diameter, when the mounting screws are screwed together, the entire frame coupling bracket automatically rotates in the bracket insertion hole to align these axes (automatic adjustment). Mind action) works. Therefore, there is an advantage that the frame members can be firmly connected without paying close attention to the axial alignment in the connection operation between the frame members.

JP 2008-050797 A JP 2008-088648 A

However, even in the above prior art, if the plate-like nut member of the frame connecting bracket inserted at the intersection of the screw insertion hole of the upper frame and the bracket insertion hole is in a completely different direction from the screw insertion hole, self-aligning The effect is not demonstrated. A long groove that indicates the axial direction of the plate-shaped nut member is formed on the upper surface of the cylindrical member, so that the operator can rotate the frame coupling bracket using this as a guideline so that the axes are aligned approximately the same. However, once the axes are aligned, the frame connecting bracket may rotate in the bracket insertion hole due to vibration during the operation, which requires time and effort in the field work.

It is conceivable to ship the frame connecting bracket in the factory in a state where the frame connecting bracket is fitted in the bracket insertion hole of the frame member in advance. Since it may shift, it is not a fundamental solution.

Therefore, the problem to be solved by the present invention is to prevent the frame connecting fitting inserted into the fitting insertion hole of one frame member from undesirably falling off and rotating, more specifically, It is an object of the present invention to provide a frame connecting bracket having a structure that is difficult to be removed from an inserted hole and is difficult to rotate.

In order to solve this problem, the present invention according to claim 1 is configured so that the end surface of one frame member is brought into contact with the inner surface of the other frame member and the frame members are connected to each other in an orthogonal state. The metal fitting is inserted into the metal fitting insertion hole of the member and is arranged at a predetermined position of the metal fitting insertion hole, and is used to be fixed by a mounting screw passed from the outer surface of the other frame member at the predetermined position. A main part having an outer shape and an outer dimension that can be inserted into the insertion hole, and a protrusion that protrudes outward from the outer surface of the main part in a normal state and can be elastically deformed so as to be accommodated in the metal fitting insertion hole by an external force. The frame connecting bracket is characterized in that the outer surface of the protruding portion elastically deformed in the state of being inserted into the bracket insertion hole is in pressure contact with the inner surface of the bracket insertion hole.

The present invention according to claim 2 is characterized in that, in the frame coupling fitting according to claim 1, at least a pair of projecting portions are provided at positions facing each other.

According to a third aspect of the present invention, in the frame connecting bracket according to the first or second aspect, the protruding portion is provided on the upper portion of the main portion.

According to a fourth aspect of the present invention, in the frame coupling bracket according to any one of the first to third aspects, a female screw for screwing the mounting screw is formed in a main portion.

According to a fifth aspect of the present invention, in the frame connecting bracket according to the fourth aspect, the protruding portion is formed as an elongated member extending in a predetermined direction, and the extending direction is substantially parallel or substantially parallel to the axial direction of the female screw. It is characterized by being orthogonal.

According to the first aspect of the present invention, when the frame connecting bracket is inserted into the bracket insertion hole of one of the frame members in a state where the projection is compressed and deformed, the elastic restoring force causes the projection to be inserted into the bracket insertion hole. Since it fits in a state where it is in pressure contact with the inner surface, it does not fall off easily. Further, for example, even when a frame connecting metal fitting having a substantially cylindrical main portion is inserted and accommodated in a cylindrical metal fitting insertion hole having a substantially same diameter, it does not easily rotate inside the metal fitting insertion hole. Therefore, if this frame connecting bracket is accommodated in a predetermined position and in a predetermined orientation in the bracket insertion hole of one frame member at the factory in advance, it will not be displaced due to subsequent transportation or vibration during work. Since the work of inserting the frame connecting metal fitting into the metal fitting insertion hole and aligning the shaft center on the site is not necessary, it is possible to save work and shorten the construction time.

According to the second aspect of the present invention, the behavior when the protruding portion is elastically deformed becomes symmetrical, and the frictional resistance when the frame connecting bracket is inserted into the bracket insertion hole or rotated is well balanced. Since it works, workability is improved.

According to the third aspect of the present invention, when the frame coupling fitting is inserted into the fitting insertion hole, the main portion is first inserted smoothly without causing a frictional resistance, and then provided on the upper portion. The projecting part is compressed and deformed, and is inserted while being pressed against the inner surface of the bracket insertion hole, so that the work and rotation can be effectively controlled by imparting frictional resistance by the projecting part while improving workability. Can be demonstrated.

According to the fourth aspect of the present invention, the axial center of the female screw of the frame coupling fitting inserted into the fitting insertion hole of one frame member is slightly different from the axial center of the mounting screw passed from the outer surface of the other frame member. Even if it is angularly misaligned, when the mounting screw is screwed into the female screw, the frame connecting bracket automatically rotates by the angle of misalignment in the bracket insertion hole to automatically align the axes. The action works. Accordingly, by further screwing the attachment screw into the female screw from this state, the attachment screw can be screwed into the female screw, and the frame members can be reliably coupled. That is, when positioning the frame connecting member by inserting it into the metal fitting insertion hole, it is not necessary to precisely match the axis of the female screw with the axis of the mounting screw (or the screw insertion hole through which the mounting screw is passed). The member can be easily joined.

According to the fifth aspect of the present invention, since the axial direction of the female screw can be confirmed by visually observing the extending direction of the protruding portion, the rough alignment of the frame connecting fitting inserted into the fitting insertion hole ( The centering of the mounting screw or its insertion hole) can be performed more easily.

It is the top view (a) and side view (b) which show an example of a frame connection structure. In FIG. 1, the upper surface shape of the frame coupling metal is shown with details omitted. It is the top view (a) and side view (b) which show one frame member (upper frame) which forms this frame connection structure. In this upper frame, the frame coupling fitting shown in FIG. 3 is accommodated in advance in a predetermined direction at a predetermined position. In FIG. 2, the upper surface shape of the frame connecting bracket is shown with details omitted. A plan view (a), a front view (b), a bottom view (c), a side view (d), and a cross-sectional view along the line AA of the frame connection fitting according to an embodiment of the present invention used to obtain this frame connection structure. (E). It is the top view (a) and front view (b) which show the fitting state (state in which the protrusion part was compressed) of the frame coupling metal fitting of FIG. A plan view (a), a front view (b), a bottom view (c), a side view (d), and a cross-sectional view along the line AA of a frame connection fitting according to another embodiment of the present invention used for obtaining this frame connection structure. (E). It is the top view (a) and front view (b) which show the fitting state (state in which the protrusion part was compressed) of the frame coupling metal fitting of FIG. A plan view (a), a front view (b), a bottom view (c), a side view (d), and a cross-sectional view taken along line AA of a frame connection fitting according to still another embodiment of the present invention used for obtaining this frame connection structure. It is a figure (e). It is the top view (a) and front view (b) which show the fitting state (state in which the protrusion part was compressed) of the frame coupling metal fitting of FIG.

A frame connecting metal fitting according to a preferred embodiment of the present invention will be described in detail below with reference to FIGS. The frame connecting bracket 10 is used together with a mounting screw 40 to obtain a frame connecting structure (FIG. 1) in which the upper frame 20 and the vertical frame 30 are connected in a so-called vertical win.

Referring to FIG. 2 together with FIG. 1, the upper frame 20 has a pair of upper frame screw insertion holes 22 and 23 that open at the end surface 21 and extend the required length in the longitudinal direction (frame width direction X). It is formed in advance in the body depth direction Y at a predetermined interval. The upper frame screw insertion holes 22 and 23 have a horizontal axis and extend in parallel. Further, the inner diameters of the upper frame screw insertion holes 22 and 23 are formed slightly larger than the mounting screw 40.

Furthermore, metal fitting insertion holes 25 and 26 opened on the upper frame surface 24 are formed at positions immediately above them within the length range in which the upper frame screw insertion holes 22 and 23 are formed. , 23 and extend downward. These metal fitting insertion holes 25 and 26 have vertical axes. Therefore, within the thickness of the upper frame 20, the upper frame screw insertion hole 22 intersects the metal fitting insertion hole 25 orthogonally, and the upper frame screw insertion hole 23 intersects the metal fitting insertion hole 26 orthogonally. Reference numeral 24 denotes an upper surface of the upper frame 20.

As shown in FIG. 2, upper frame screw insertion holes 22 and 23 and metal fitting insertion holes 25 and 26 are formed in the upper frame 20 at both ends in the width direction in the same manner. And the left and right vertical frames 30 and 30 are connected.

In the vertical frame 30, screw insertion holes 31 and 32 that penetrate the vicinity of the upper end in the thickness direction (frame width direction X) have a predetermined interval in the frame depth direction Y (the same interval as the upper frame screw insertion holes 22 and 23). It is formed in advance. The inner diameters of the vertical frame screw insertion holes 31 and 32 are formed to be slightly larger than the mounting screw 40, and may be the same diameter as the upper frame screw insertion holes 22 and 23, for example. The positions of the vertical frame screw insertion holes 31 and 32 in the frame depth direction Y are aligned with the upper frame screw insertion holes 22 and 23 when the upper frame 20 and the vertical frame 30 are connected vertically. Designed to be The openings 33, 34 on the vertical frame outer surface 36 side of the vertical frame screw insertion holes 31, 32 are enlarged according to the diameter of the head 41 in order to receive the head 41 of the mounting screw 40. Reference numeral 35 denotes an inner surface of the vertical frame 30 joined to the end surface 21 of the upper frame 20. Reference numeral 37 denotes an upper end surface of the vertical frame 30.

As an example, the frame connecting bracket 10 used together with the mounting screw 40 to obtain the frame connecting structure shown in FIG. 1 has the shape shown in FIG. 3 has a main portion 11 that is generally formed in a columnar shape. The outer diameter of the main portion 11 is formed substantially the same as the inner diameter of the metal fitting insertion holes 25 and 26 of the upper frame 20. A chamfer 12 is provided around the lower surface of the main portion 11 to facilitate insertion into the metal fitting insertion holes 25 and 26. The main portion 11 is formed with a screw insertion hole 13 extending in a direction perpendicular to the axial direction and penetrating the side surface of the main portion 11. The inner diameter of the screw insertion hole 13 is slightly larger than the mounting screw 40. Furthermore, a plate-like nut 14 is provided with the same axis as the screw insertion hole 13. In this embodiment, the plate-like nut 14 is integrally fixed to the main portion 11, but as shown in Patent Documents 1 and 2 cited as the prior art, a slit is formed on the lower surface of the main portion 11 to A plate-like nut 14 formed as a separate member from the portion 11 may be inserted from the slit and disposed concentrically with the screw insertion hole 13. The plate nut 14 is preferably formed of the same material as the mounting screw 40 from the viewpoint of securely screwing the mounting screw 40 to prevent loosening. For example, the metal mounting screw 40 is made of metal. The plate-like nut 40 is preferable.

On the upper surface of the main part 11, an elastically deformable protrusion 15 is formed integrally with the main part 11. In this embodiment, the top portion of the main portion 11 normally protrudes from the cylindrical side surface of the main portion 11 so as to incline outward, but when the external pressure is applied, the outer diameter of the main portion 11 is substantially the same. A pair of protrusions 15, 15 that can be contracted to a diameter (see FIG. 4) are shown as being opposed. Each projecting portion 15 has a substantially half-moon-shaped cross-sectional shape and a substantially parallelogram-shaped vertical cross-sectional shape. It gradually protrudes outward from the cylindrical side surface of the main part 11.

In addition, since the protrusion parts 15 and 15 are comparatively thin, and the width dimension is formed in the comparatively small ratio with respect to the perimeter of the main part 11, the main part 11 is made of hard PVC, an acrylic resin, nylon resin, By forming the synthetic resin such as phenol resin, urea resin, melamine resin, polytetrafluoroethylene resin, or polypropylene resin, the protrusions 15 and 15 can be elastically deformed as described above. Although exaggerated in the figure, the inclination angle of the protrusions 15 and 15 is actually about 3 to 5 degrees. The protruding length of each protruding portion 15 in the normal state (the length in the radial direction in which the upper end protrudes from the cylindrical side surface of the main portion 11) is determined when the inner diameter of the metal fitting insertion holes 25 and 26 of the upper frame 20 is 10 mm. What is necessary is just to become larger about 0.2-1.0 mm. If the protruding length is less than 0.2 mm, accidental rotation in the metal fitting insertion holes 25 and 26 is likely to occur, and if it exceeds 1.0 mm, it is difficult to insert into the metal fitting insertion holes 25 and 26.

On the upper surface of the main portion 11, a flat projection 16 is further formed between the pair of projecting portions 15 and 15. As described later, the protrusions 16 are appropriately rotated so as to be in a predetermined direction when the frame connecting metal fitting 10 is inserted into the metal fitting insertion holes 25 and 26 of the upper frame 20, and a frame connecting structure is obtained. In order to pull out the damaged frame connecting metal fitting 10 from the metal fitting insertion holes 25 and 26 when replacement becomes necessary due to damage or the like later, it is possible to easily insert or pull out the protrusion 16 by using radio pliers or the like. It is what you want to do. In this embodiment, it is formed as a flat projection 16 so that a radio pliers or the like can be inserted and picked from both the front, rear, left and right. Further, since the protrusion 16 is formed as a long body extending in the same direction as the screw insertion hole 13, it is inserted into the metal fitting insertion holes 25 and 26 of the upper frame 20 by matching this with the frame width direction X. It is easy to make the direction of the frame connecting bracket 10 substantially coincide with the axis C (FIG. 1) of the upper frame screw insertion holes 22 and 23.

The axial length of the main part 11 including the protrusions 15 and 15 and the protrusions 16 is such that the frame connecting bracket 10 is inserted into the bracket insertion holes 25 and 26 of the upper frame 20 and the shaft of the female screw 14a of the plate nut 14 is inserted. When the center is aligned with the axial center of the upper frame screw insertion holes 22 and 23, the projecting portions 15 and 15 and the projection 16 do not project from the surface 24 of the upper frame 20, and are preferably substantially flush with the surface 24. The dimensions are such that Particularly, when the axial length of the main portion 11 is made substantially the same as the depth of the metal fitting insertion holes 25 and 26, and the frame connecting metal fitting 10 is inserted to the bottom of the metal fitting insertion holes 25 and 26, the axis is automatically set. It is preferable to set the dimensions of the respective parts so that they are aligned with the axial centers of the upper frame screw insertion holes 22, 23. That is, the axis of the female screw 14a is located at a distance h (FIG. 1 (b)) from the upper surface of the frame coupling fitting 10, and coincides with the axis C of the upper frame screw insertion holes 22 and 23.

In order to obtain the frame coupling structure of FIG. 1 using the frame coupling bracket 10 together with the mounting screw 40, the upper frame 20 and the vertical frame 30 are arranged so that the surface 24 of the upper frame 20 is flush with the upper end surface 37 of the vertical frame 30. The mounting screws 40 are respectively attached to the vertical frame screw insertion holes 31 and 32 and the upper frame screw insertion holes 22 and 23 that are aligned in the horizontal direction in this positional relationship. insert.

The frame connecting bracket 10 may be set in advance at the intersection position between the bracket insertion holes 25 and 26 of the upper frame 20 and the upper frame screw insertion holes 22 and 23, or set at the intersection position at the site where the frame coupling structure is assembled. In either case, the projection 16 is picked with radio pliers or the like while visually observing from the opening of the metal fitting insertion holes 25 and 26 opened on the upper frame surface 24, and the direction thereof is substantially the frame body width direction X. Temporary alignment is performed by appropriately rotating to be parallel. Since a pair of elastically deformable protrusions 15 and 15 are formed at the upper end of the frame connecting metal 10, the protrusions 15 and 15 are inserted into the metal fitting insertion holes 25 and 26 due to their elasticity. The outer diameter of the holes 25 and 26 automatically contracts to the same outer diameter, and once inserted into the metal fitting insertion holes 25 and 26, the protrusions 15 and 15 come into pressure contact with the inner walls, so that they can be easily moved and rotated. Not to be maintained. Therefore, the frame connection fitting 10 temporarily aligned in the fitting insertion holes 25 and 26 is in its position (vertical direction and the axis of the female screw 14a) unless the protrusion 16 is picked up and rotated by radio pliers or the like. Will not change inadvertently.

In this state, the mounting screw 40 is inserted into the upper frame screw insertion holes 22, 23, and the driver's tip is inserted into a plus or minus groove (not shown) formed in the head 41 and rotated in the tightening direction. As it is inserted, the mounting screw 40 is screwed into the female screw 14a of the frame connecting bracket 10 set at the intersection position.

In the temporary alignment, the direction of the protrusion 16 is strictly parallel to the frame width direction X (in other words, the axis of the female screw 14a of the frame connecting bracket 10 set at the intersection position is inserted into the mounting position. It is not necessary to exactly match the axis of the screw 40). Since the outer diameter of the frame connecting bracket 10 is formed to be substantially the same as the bracket insertion holes 25 and 26 of the upper frame 20, it is possible to install it if rough alignment is performed even if alignment is not strictly performed. When the screw 40 is screwed into the female screw 14a, the frame connecting metal fitting 10 is automatically rotated in the metal fitting insertion holes 25 and 26 so that their axes are aligned (automatic alignment action). The screw 40 can be securely screwed into the female screw 14a. The protrusions 15 and 15 are pressed against the inner walls of the metal fitting insertion holes 25 and 26 due to their elasticity, but can be rotated within the metal fitting insertion holes 25 and 26 when a large external force is applied. There is no loss.

FIG. 5 shows another embodiment of the frame connecting bracket 10 used with the mounting screw 40 to obtain the frame connecting structure of FIG. The frame connecting metal fitting 10 of FIG. 5 is different from the frame connecting metal fitting 10 of FIG. 3 in the protrusion 15 and the protrusion 16 provided at the upper end of the main portion 11. Since other parts or elements are the same as those of the frame coupling metal fitting 10 of FIG. 3, the same reference numerals are given to them and description thereof is omitted. Further, work and effects when obtaining a frame connection structure using the frame connection metal fitting 10 (automatic alignment action, or unexpected rotation and position due to the protrusion 15 being pressed against the inner walls of the metal fitting insertion holes 25 and 26) Since the action for preventing the deviation is basically the same as that already described, the description thereof is omitted.

In this embodiment, the elastically deformable protrusions 15 formed to be opposed to each other on the upper surface of the main part 11 are inclined to the outside from the vertical inner surface 15c and the cylindrical side surface of the main part 11, respectively. 11 is formed of an inclined arc-shaped surface 15d formed so as to have a slightly larger diameter concentrically with the cylindrical side surface, and a pair of vertical side surfaces 15e formed therebetween. A notch 15f is formed in the middle in the height direction across the side surface 15e. Each projecting portion 15 has a substantially half-moon shaped cross-sectional shape and a substantially trapezoidal vertical cross-sectional shape. The vertical inner surfaces 15c face each other, and the inclined arc-shaped surface 15d is inclined mainly upward from the upper end of the main portion 11. It gradually protrudes outward from the cylindrical side surface of the portion 11. Therefore, in the normal state, the inclined arc-shaped surface 15d of the protruding portion 15 protrudes outward from the cylindrical side surface of the main portion 11 in an inclined shape, but is substantially the same as the outer diameter of the main portion 11 when subjected to external pressure. It can be shrunk to a diameter (see FIG. 6). The notch 15f serves to facilitate this elastic deformation.

Further, the projection 16 in this embodiment is a flat plate-like projection 16 wider than the projection 16 in the frame connecting bracket 10 of FIG. 3, and a groove 16a is formed in the center in the width direction. Therefore, since the frame connecting bracket 10 can be rotated by inserting a slotted screwdriver into the groove 16a (a minus or plus driver if the groove 16a is a plus shape), the frame connecting bracket 10 can be used as the bracket of the upper frame 20. Work for aligning the screw insertion hole 13 with the axis of the metal fitting insertion holes 25 and 26 in the temporary alignment (axis alignment) when setting the insertion holes 25 and 26 at the intersections of the upper frame screw insertion holes 22 and 23 Can be easily performed. It is also easy to pull out the frame connecting bracket 10 from the bracket insertion holes 25 and 26 by gripping the protrusion 16 with a radio pliers or the like.

FIG. 7 shows still another embodiment of the frame connecting bracket 10 used together with the mounting screw 40 to obtain the frame connecting structure of FIG. The frame connecting bracket 10 in FIG. 7 differs from the frame connecting bracket 10 in FIG. 3 in the protrusion 15 and the protrusion 16 provided at the upper end of the main portion 11. Since other parts or elements are the same as those of the frame coupling metal fitting 10 of FIG. 3, the same reference numerals are given to them and description thereof is omitted. Further, work and effects when obtaining a frame connection structure using the frame connection metal fitting 10 (automatic alignment action, or unexpected rotation and position due to the protrusion 15 being pressed against the inner walls of the metal fitting insertion holes 25 and 26) Since the action for preventing the deviation is basically the same as that already described, the description thereof is omitted.

In this embodiment, the elastically deformable protrusions 15 formed to face each other on the upper surface of the main part 11 are substantially the same as the protrusions 15 in the frame connecting bracket 10 of FIG. It is different in that it is extended toward the upper surface portion 15g. Each projecting portion 15 has a substantially bowl-like vertical cross-sectional shape, its inclined inner surfaces 15 a face each other, and the inclined arc-shaped surface 15 b outwards from the cylindrical side surface of the main portion 11 as it goes obliquely upward from the upper end of the main portion 11. Project gradually. Therefore, in the normal state, the inclined arcuate surface 15b of the protruding portion 15 protrudes outward from the cylindrical side surface of the main portion 11 in an inclined shape, but is substantially the same as the outer diameter of the main portion 11 when subjected to external pressure. It can be shrunk to a diameter (see FIG. 8).

Moreover, although the protrusion 16 is formed between the protrusion parts 15 and 15 in the upper surface of the frame connection metal fitting 10 of FIG. 3 and FIG. 5, the protrusion 16 does not exist in the frame connection metal fitting 10 of this embodiment. A gap 15h is formed between the upper surface portions 15g and 15g of the projecting portions 15 and 15 of the frame connecting metal 10, and when the projecting portions 15 and 15 are elastically deformed inward, the interval of the gap 15h is increased. Since it becomes smaller (FIG. 8), the frame connecting bracket 10 can be rotated by inserting a flathead screwdriver into the reduced gap 15 h ′. Therefore, even if the protrusion 16 is not formed, in the temporary alignment when the frame connecting bracket 10 is set at the intersection position between the bracket insertion holes 25 and 26 of the upper frame 20 and the upper frame screw insertion holes 22 and 23, The operation | work which aligns the screw insertion hole 13 with the axial center of the metal fitting insertion holes 25 and 26 can be performed. Further, it is also easy to pull out the frame connecting metal fitting 10 from the metal fitting insertion holes 25 and 26 by inserting a tool having a T-shape or L-shaped tip through the gap 15h 'and hooking it on the upper surface portions 15g and 15g.

In the above, the frame connecting brackets of the present invention have been described in detail by giving some examples. However, the present invention is not limited to the forms of these examples, and is within the scope of the invention defined in the claims. It can be implemented with various modifications or changes.

The frame connecting metal fitting 10 of the present invention is in a state in which the shaft center has been aligned at the intersection of the metal fitting insertion holes 25 and 26 of the frame member (the upper frame 20 in the embodiment) and the upper frame screw insertion holes 22 and 23 in advance at the factory. It can be accommodated. Once the axis alignment is completed at the intersection point, the projecting portion 16 is in pressure contact with the inner surfaces of the metal fitting insertion holes 25 and 26 even if vibration occurs during normal operations during subsequent transportation or construction. There is no accidental dropout or rotation. In this way, there is an advantage that the labor on site can be saved. However, as described above, the frame connecting bracket 10 is prepared separately from the frame member, and the position of the intersection is determined on site. Needless to say, the axis may be aligned after being housed in the housing.

In the embodiment described above, the frame connecting bracket 10 of the present invention is used for the upper frame of the frame connecting structure that is framed vertically, but other horizontal frames (middle horizontal frame or four-sided frame may be used). For example, a lower frame) or a vertical frame of a frame connection structure that is framed horizontally. The shape of the frame connection structure and the shape / material of the frame member are not particularly limited.

The frame connecting bracket 10 of the present invention exhibits the effect of preventing the rotation 15 from being accidentally rotated or displaced by the protruding portion 15 being pressed against the inner walls of the bracket insertion holes 25, 26, and the bracket insertion brackets 25, 26, A protrusion 16 (FIGS. 3 to 4, FIG. 5 to FIG. 6) and a gap 15h ′ (FIG. 8) are inserted in order to perform axial center alignment as temporary positioning by inserting the upper frame screw insertion holes 22 and 23 at the intersections. And can be rotated in the metal fitting insertion holes 25 and 26 so that when the mounting screw 40 is inserted into the screw insertion hole 13, the shaft is automatically aligned (automatic alignment). It must be something that does not prevent you from doing it. In other words, unless a positive external force is applied, the frame connecting bracket 10 maintains its orientation (axial center) without rotating in the bracket insertion holes 25 and 26, but using radio pliers or a flat-blade screwdriver. When an automatic alignment is performed by applying a rotational force or screwing the mounting screw 40 to the female screw 14a, an external force that exceeds the rotational restricting force by pressing against the inner walls of the metal fitting insertion holes 25 and 26 acts. While being subjected to resistance, it can be rotated in the metal fitting insertion holes 25 and 26. Such required performance is considered to depend mainly on the frictional resistance between the outer surface of the frame connecting metal fitting 10 and the metal fitting insertion holes 25 and 26, and therefore, the elastic deformation due to the radial protrusion length of the protrusion 16 and its shape. This can be realized by appropriately designing the degree. If irregularities are formed on the outer surfaces (inclined arc-shaped surfaces 15b and 15d) and the outer surface of the main portion 11, the rotation restricting force increases. Further, these outer surfaces may be coated with a low friction coefficient material or a high friction coefficient material. According to those skilled in the art, it is possible to take an appropriate balance between the rotation restricting force and the rotation permissible force for realizing the above-described operation of the present invention in consideration of these.

In the above-described embodiment, the frame connecting metal fitting 10 is shown as having a substantially cylindrical main portion 11 having an outer diameter substantially the same as the inner diameter of the metal fitting insertion holes 25 and 26. What is necessary is just to have the outer shape and outer dimension which can be inserted in the metal fitting insertion holes 25 and 26, and it is not limited to this. The metal fitting insertion holes 25 and 26 may have a columnar shape, a conical shape, a truncated cone shape, a prismatic shape, or the like, and the cross-sectional shape thereof may be a circle, a triangle, a quadrangle, or the like. Alternatively, for example, the lower part may have a special shape such as a cylindrical shape and the upper part may have a conical shape or a truncated cone shape, or the lower part may have a prism shape and the upper part may have a pyramid shape or a truncated pyramid shape. The main portion 11 of the frame connecting bracket 10 has a shape that can be inserted into the bracket insertion holes 25 and 26, and can have substantially the same shape. For example, the lower portion is a columnar shape or a prismatic shape, and the upper portion is a cone / frustum shape. In the case of the bracket insertion holes 25 and 26 having a pyramid / pyramidal shape, the main portion 11 may have a columnar shape or a prismatic shape corresponding to the lower shape thereof.

In the embodiment described above, the pair of protrusions 15 and 15 are provided on the upper portion of the main portion 11 at positions facing each other. However, the position and number of the protrusions are not limited, and the rotation restriction and What is necessary is just to make the effect | action of rotation permission compatible. For example, with respect to the formation position of the protrusion 15 in the height direction, the protrusion 15 may be provided in the middle or lower part of the main part 11 in the height direction. A single protrusion 15 may be provided so as to protrude from the three, three protrusions 15 may be provided at intervals of 120 degrees, or four protrusions 15 may be provided at intervals of 90 degrees.

A screw insertion hole 13 that is screwed with the mounting screw 40 is formed in the main portion 11 of the frame coupling metal 10 of the embodiment described above, and a plate-like nut 14 having a female screw 14 a is fixed to the screw insertion hole 13. However, as described above, a slit leading to the screw insertion hole 13 is formed on the lower surface of the main portion 11, and the plate-like nut 14 is inserted from the slit to be arranged at a predetermined position. A female screw 14a may be provided in the insertion hole 13 itself, and the mounting screw 40 may be screwed. Or it is good also as the main part 11 which does not have the screw insertion hole 13 and the internal thread 14a. In this case, a screw (wood screw or the like) having a sharp tip is used as the mounting screw 40, and the mounting screw 40 passed through the vertical frame screw insertion holes 31 and 32 is screwed into the main part 11 of the frame connecting bracket 10. Therefore, the self-aligning action described above does not work.

The protruding portion 15 (and the protrusion 16) of the frame connecting bracket 10 of the embodiment described above is formed as an elongated member extending substantially parallel to the axial direction of the female screw 14a, and this extending direction is formed on the upper surface of the upper frame 20. Since the axial direction of the female screw can be confirmed by visual observation from the opening of the metal fitting insertion holes 25 and 26 opened, it is possible to roughly align the frame connection metal fitting inserted into the metal fitting insertion hole (attachment screw or its insertion hole). The projecting portion 15 (and the projection 16) is formed as an elongated member extending in a direction substantially perpendicular to the axis of the female screw 14a. The same operational effects can be exhibited.

DESCRIPTION OF SYMBOLS 10 Frame coupling metal 11 Main part 12 Chamfering 13 Screw insertion hole 14 Plate-like nut 14a Female screw 15 Elastically deformable protrusion 15a Inclined inner surface 15b Inclined arc-shaped surface (outer surface)
15c Vertical inner surface 15d Inclined arc-shaped surface (outer surface)
15e Vertical side surface 15f Notch 15g Upper surface portion 15h Clearance 15h 'Reduced clearance 16 Protrusion 16a Groove 20 Upper frame 21 End surface 22, 23 of upper frame Screw insertion hole 24 Upper frame surface 25, 26 Bracket insertion hole 30 Vertical frame 31, 32 Vertical frame screw insertion holes 33, 34 Diameter expansion opening 35 Inner surface 36 of vertical frame Outer surface 37 of vertical frame Upper end surface of vertical frame

Claims (5)

The end face of one frame member is brought into contact with the inner side surface of the other frame member, and the frame members are inserted into the metal fitting insertion holes of one frame member in order to connect the frame members to each other in a perpendicular state. And a main portion having an outer shape and an outer dimension that can be inserted into the metal fitting insertion hole, and is fixed to the mounting screw that is passed from the outer surface of the other frame member at the predetermined position. A protrusion that protrudes outward from the outer surface of the main portion in a normal state and is elastically deformable so as to be accommodated in the bracket insertion hole by an external force, and is elastically deformed when inserted into the bracket insertion hole. A frame connecting bracket characterized in that the outer surface is pressed against the inner surface of the bracket insertion hole. The frame connecting bracket according to claim 1, wherein at least a pair of projecting portions are provided at positions facing each other. The frame connecting bracket according to claim 1, wherein the projecting portion is provided on an upper portion of the main portion. The frame connecting bracket according to any one of claims 1 to 3, wherein a female screw for screwing the mounting screw is formed in a main portion. The frame connecting bracket according to claim 4, wherein the protruding portion is formed as an elongated member extending in a predetermined direction, and the extending direction is substantially parallel or substantially orthogonal to the axial direction of the female screw.