Frame material connecting bracket

Abstract

To provide a frame material connection bracket capable of easily and appropriately connecting and fixing two frame materials to each other.SOLUTION: A frame material connection bracket comprises two bracket bodies 30 in a substantially right-angled triangular prism shape; and a pair of a bolt member 31 and a nut member 32 mutually connecting and holding the bracket bodies 30. In the bracket body 30, a shank insertion hole 43 through which a shank part 310 of the bolt member 31 can be inserted penetrates from one end face 3a to another end face 3b. In one of two sides holding a right angle of the other end face 3b therebetween, a first engage part 34 is provided which can be engaged at inner edges of groove parts 12 and 22 provided in side faces 10 and 20 of one-side frame materials 1 and 2 and in the other of the two sides, a second engage part 35 is provided which can be engaged at the inner edges of the groove parts 12 and 22 provided in the side faces 10 and 20 of the other-side frame materials 1 and 2. The two bracket bodies 30 are combined in such a direction that the other end faces 3b are mutually opposed, and connected so as to be proximate and separate in an opposite direction by the bolt member 31 and the nut member 32.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a frame member connecting bracket used for connecting and fixing frame members of structures such as partition walls, pedestals, and shelves in a factory at right angles.

Background Art

[0002] As a structure for connecting and fixing two long frame members formed continuously in one direction by extrusion molding or the like at right angles, a bracket body formed substantially at a right angle is applied to a corner portion between side surfaces of two frame members formed by being combined at right angles, and engaging members are respectively inserted and engaged into groove portions provided along the side surfaces of the frame members, and the two frame members are connected and fixed to each other at right angles by tightening and fixing with bolts (for example, Patent Documents 1 to 3).

[0003] The frame member connecting brackets of Patent Documents 1 and 2 include a substantially right-angled plate-shaped bracket body (coupling tool), a plate-shaped engaging nut, and a bolt screwed and connected to the engaging nut. The bracket body is applied along a corner portion between side surfaces of two frame members formed by being combined at right angles, the engaging nut is inserted and engaged into a groove portion provided along the side surface of the frame member, and the bolt is tightened to the nut through the bracket body, so that the engaging nut is pressed and engaged with the groove portion respectively. Thereby, the frame members are connected and fixed to each other.

[0004] The frame member connecting bracket of Patent Document 3 includes a right-angled triangular bracket body (connecting piece), engaging pieces respectively protruding from two sides sandwiching the right angle of the bracket body, a nut arranged between these engaging pieces, a nut holding portion for holding the nut, and a bolt screwed and connected to the nut. The two sides of the bracket body are applied to a corner portion between side surfaces of two frame members formed by being combined at right angles, the engaging pieces are engaged with a groove portion provided along the side surface of the frame member, and the bolt is tightened to the nut, so that the engaging pieces are respectively pressed and fitted into the groove portion. Thereby, the frame members are connected and fixed to each other.

Prior Art Documents

[0005] [Patent Document 1] JITZEN No. 63-048008 [Patent Document 2] Japanese Patent Publication No. 2002-295419 [Patent Document 3] Japanese Patent Publication No. 2003-013919 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, the frame member connecting brackets described in Patent Documents 1 and 2 require, when connecting and fixing frame members together, to insert the engaging nuts into the grooves of both frame members, then to place the bracket body against the corner between the side surfaces of the two frame members, and then to screw the bolts into each engaging nut via the bracket body. This results in a large number of work steps and makes the fixing process time-consuming. Furthermore, because the engaging nuts are not positioned and held within the grooves, the fixing process becomes even more time-consuming, and there is a problem that the mounting position of the bracket body is prone to shifting.

[0007] Furthermore, in the frame member connecting bracket of Patent Document 3, when connecting and fixing frame members together, a bolt is screwed into a nut inside the bracket body from a direction perpendicular to the slanted side of the bracket body, causing the tip of the bolt to push the engaging piece laterally (in the direction of the outer circumference of the bolt), engaging the engaging piece with the inner edge of the groove. That is, the engaging piece is pushed in a direction perpendicular to the tightening direction of the bolt and engages with the inner edge of the groove. Therefore, due to misalignment of the bolt or engaging piece, the pressing force of the bolt may not be properly transmitted to the engaging piece when tightening the bolt, and there was a risk that the frame members could not be connected to each other with sufficient fastening force. In addition, because the structure is relatively complex, deformation and misalignment of each part are easily caused by external loads, and there was a risk that the frame members could not be properly connected to each other.

[0008] This invention has been made in view of the above problems, and aims to provide a frame material connecting bracket that can easily and appropriately connect and fix two long frame materials to each other. [Means for solving the problem]

[0009] To solve the above problems, the frame material connecting bracket of the present invention employs the following technical means.

[0010] The present invention relates to a frame member connecting bracket for connecting and fixing two long frame members at a right angle, comprising two substantially right-angled triangular prism-shaped bracket bodies, and a set of bolt and nut members for connecting and holding the bracket bodies together, wherein each bracket body has a shaft insertion hole extending from one end face to the other, through which the shaft of the bolt member can be inserted, and on one of the two sides of the other end face that straddle the right angle, there is a first engagement portion that can engage with the inner edge of a groove provided on the side surface of one frame member, and on the other side of the two sides, there is a second engagement portion that can engage with the inner edge of a groove provided on the side surface of the other frame member, and the two bracket bodies are combined with their other end faces facing each other, and connected by the bolt and nut members so that they can move closer to and away from each other in the opposing direction, and the bracket body is The bracket body has a guide shaft provided on the slanted side of the other end face and protruding in the same direction as the opposing direction, and a guide groove provided along the inclined surface between the one end face and the slanted side of the other end face of the bracket body and extending from the slanted side of the other end face in the same direction as the opposing direction, wherein the guide shaft is formed in a substantially right-angled triangular prism shape and has two axial sides that sandwich the right-angle portion of the guide shaft, and the guide groove is formed in a substantially right-angled V-shape in cross-section and has two groove bottom surfaces that sandwich the right-angle portion of the guide groove, and when the two bracket bodies are combined with their other end faces facing each other, the guide shaft of one bracket body is inserted into and engages with the guide groove of the other bracket body with its axial side surface in close proximity to the groove bottom surface. It is.

[0011] Preferably, the bracket body is The bracket body has a first side portion and a second side portion that sandwich the right-angle portion, and the bottom surface of one of the guide grooves is formed on a surface substantially parallel to the first side portion, and the bottom surface of the other of the guide groove is formed on a surface substantially parallel to the second side portion. It is. [Effects of the Invention]

[0013] According to the frame member connecting bracket of the present invention, the first engaging portion provided on one of the two sides of the bracket body that straddle the right angle of the other end face is engaged with the groove of one frame member, and the second engaging portion provided on the other side is engaged with the groove of the other frame member. In this state, the bolt member and nut member are tightened, and the two bracket bodies are brought closer together or further apart in their opposing directions, thereby fixing and holding both frame members in place, thus significantly reducing the effort required for fixing. Furthermore, since the relative positions of the first engaging portion and the second engaging portion do not change when tightening the bolt member and nut member, misalignment of the mounting position of the bracket body relative to the two frame members is less likely to occur, making the fixing work easier and more appropriate. [Brief explanation of the drawing]

[0014] [Figure 1] This figure shows two frame members connected at a right angle using the frame member connecting bracket of the embodiment. [Figure 2] This is a cross-sectional view of the area around the connection point when two frame members are connected at a right angle using the frame member connecting bracket of the embodiment. [Figure 3] This is a perspective view of one end face of the frame material connecting bracket of the embodiment. [Figure 4] This is a perspective view of the other end face of the frame material connecting bracket in the embodiment. [Figure 5] These are a front view, a right side view, and a top view of the frame member connecting bracket of the embodiment. [Figure 6] These are the rear view, left side view, and bottom view of the frame material connecting bracket of the embodiment. [Figure 7] This is an exploded perspective view of the frame material connecting bracket of the embodiment. [Figure 8] These are the front view, right side view, and top view of the bracket body. [Figure 9] These are the rear view, left side view, and bottom view of the bracket body. [Figure 10] This is a perspective view of a frame connecting bracket in another embodiment. [Figure 11] This is an exploded perspective view of a frame connecting bracket in another embodiment.

Best Mode for Carrying Out the Invention

[0015] Hereinafter, the connecting structure of the frame members for a structure according to an embodiment of the present invention will be described based on the drawings. Note that the embodiment described below is an example embodying the present invention, and does not limit the configuration of the present invention with its specific examples.

[0016] As shown in FIGS. 1 to 7, the frame member connecting bracket 3 of the present embodiment combines and connects two long frame members 1 and 2 at right angles, and is mainly used for assembling and forming structures such as partition walls, pedestals, and shelves in a factory.

[0017] The frame members 1 and 2 are hollow square-section corner members formed continuously in one direction by extrusion molding of a metal material such as aluminum or a magnesium alloy. The end face portion 21 of the other frame member (hereinafter, appropriately referred to as the "second frame member") 2 is brought into contact with the side face portion 10 of one frame member (hereinafter, appropriately referred to as the "first frame member") 1 and combined at right angles, and the frame member connecting bracket 3 is fixed to each of two right-angle corner portions formed by the side face portions (hereinafter, referred to as "frame member side faces") 10 and 20 of these two frame members 1 and 2, thereby being connected.

[0018] [[ID=1十七]] In each of the four frame member side faces 10 and 20, groove portions 12 and 22 having a substantially U-shaped cross section that are continuous in the extending direction of the frame member 2 are formed between the end face portions 11 and 21. The groove portions 12 and 22 are provided at the central portion between the long edges of the frame member side faces 10 and 20. When the frame members 1 and 2 are combined at right angles as described above, the groove portion 12 on the side of the first frame member 1 and the groove portion 22 on the side of the second frame member 2 are connected at the right-angle corner portion, and constitute a single groove body that is continuously formed in a substantially L shape from the side face portion 10 of the first frame member 1 to the side face portion 20 of the second frame member 2.

[0019] Flange portions 14 and 24 are formed on the opposing inner edges of the groove portions 12 and 22, projecting toward the central portion. These flange portions 14 and 24 serve as the engaging portions for engaging and holding the engaging portions 35 and 36 of the frame material connecting bracket 3. The gap S between the end faces of the flange portions 14 and 24 forms the opening of the groove portions 12 and 22.

[0020] The frame member connecting bracket 3 consists of two substantially right-angled triangular prism-shaped bracket bodies 30 and a set of bolt members 31 and nut members 32 that connect and hold the bracket bodies 30 together. The end faces of the bracket bodies 30 are facing each other and connected from the opposing direction by the bolt members 31 and nut members 32. In other words, the frame member connecting bracket 3 is formed by dividing the main body into two blocks (bracket bodies 30), and the bolt members 31 and nut members 32 are connected from the outside of one end face portion 3a.

[0021] The frame member connecting bracket 3 is formed in a roughly right-angled triangular prism shape when the two bracket bodies 30 are assembled as described above. The two side portions that sandwich the right-angled portion (a roughly flat portion composed of the first side portion 3c of one bracket body 30 and the second side portion 3d of the other bracket body 30) are placed against the frame member sides 10 and 20, respectively, and the bracket is connected and fixed to the frame members 1 and 2 by tightening the bolt member 31 and the nut member 32.

[0022] In this embodiment, the bracket body 30 is formed from a metal material such as stainless steel or aluminum, but it is not limited to any material as long as it can connect and fix the frame members 1 and 2 to each other with the desired strength, such as synthetic resin or ceramic having high strength and high modulus.

[0023] As shown in Figures 5 to 9, the bracket body 30 has one end face portion (hereinafter referred to as "body one end face portion") 3a formed in the shape of a substantially right-angled isosceles triangle with a substantially flat surface, and the other end face portion (hereinafter referred to as "body other end face portion") 3b formed in the shape of a substantially right-angled isosceles triangle with a plurality of stepped portions 301, 302.

[0024] A connecting hole 33 is formed approximately in the center of one end face 3a of the main body, capable of engaging and holding the head portion 311 of the bolt member 31 and engaging and holding the nut member 32 in a rotation-preventing state. More specifically, the connecting hole 33 includes a head insertion hole 41 through which the head portion 311 can be inserted, a nut insertion hole 42 through which the nut member 32 can be inserted, and a shaft insertion hole 43 through which the shaft portion (hereinafter referred to as "bolt shaft") 310 of the bolt member 3 can be inserted. These head insertion hole 41, nut insertion hole 42, and shaft insertion hole 43 are arranged in this order from one end face 3a to the other end face 3b of the main body. The shaft insertion hole 43 penetrates from the nut insertion hole 42 in the opposite direction to the other end face 3b of the main body.

[0025] The connecting hole 33 is formed in a position that aligns with the connecting hole 33 of the other bracket body 30 when the two bracket bodies 30 are assembled. Therefore, when a bolt member 31 is inserted through the connecting hole 33 of one bracket body 30, the bolt shaft 310 is inserted through to the connecting hole 33 of the other bracket body 30 and can be screwed into the nut member 32 inserted into its nut insertion hole 42.

[0026] The other end face portion 3b of the main body has a roughly right-angled triangular prism-shaped first stepped portion 301 that protrudes outward from the other end face portion 3b along one of the two side portions 3c and 3d that sandwich the right-angle portion (hereinafter referred to as the "first side portion") 3c and the inclined surface portion 3e, and a roughly right-angled triangular prism-shaped second stepped portion 302 that protrudes outward from the other end face portion 3b along the other side portion (hereinafter referred to as the "second side portion") 3d.

[0027] On the side edge of the first stepped portion 301 on the side surface portion 3c side, that is, on one of the two sides that straddle the right angle of the other end face portion 3b of the main body, there is a first engaging portion 34 with a substantially L-shaped cross-section that can engage with the flange portions 14, 24 of the groove portions 12, 22 provided on one of the frame members 1, 2. The first engaging portion 34 is provided projecting from the end face portion (hereinafter referred to as the "first stepped end face portion") 34b of the first stepped portion 301 in the opposing direction, that is, in the same direction as the extension direction of the shaft insertion hole 43. When the first engaging portion 34 is engaged with the flange portions 14, 24, the first stepped end face portion 34b presses against the end faces of the flange portions 14, 24, and the first engaging portion 34 engages with the flange portions 14, 24 from the inside of the groove portions 12, 22.

[0028] On the side edge of the second step portion 302 on the side surface portion 3d side, that is, on the other side of the two sides that straddle the right angle of the other end face portion 3b of the main body, a second engaging portion 35 is provided, which has a substantially L-shaped cross-section and can engage with the flange portions 14, 24 of the groove portions 12, 22 provided on the other frame members 1, 2. The second engaging portion 35 is provided projecting from the end face portion 35b of the second step portion 302 (hereinafter referred to as the "second step end face portion") 35b in the opposing direction, that is, in the same direction as the extension direction of the shaft insertion hole 43. When the second engaging portion 35 is engaged with the flange portions 14, 24, the second step end face portion 35b presses against the end faces of the flange portions 14, 24, and the second engaging portion 35 engages with the flange portions 14, 24 from the inside of the groove portions 12, 22.

[0029] The dimensions (height dimensions) D1 of the first engaging portion 34 and the second engaging portion 35 in the opposing direction are formed to be smaller than the distance between the end faces of the flange portions 14 and 24, i.e., the opening width S1 of the groove portions 12 and 22. This allows the first engaging portion 34 and the second engaging portion 35 to be easily inserted into the gap S between the flange portions 14 and 24 when attaching the frame material connecting bracket 3 to the right-angle corners of the frame material sides 10 and 20.

[0030] When the two bracket bodies 30 are assembled, the first engaging portion 34 of one bracket body 30 and the second engaging portion 35 of the other bracket body 30 are positioned adjacent to each other (see Figures 4 to 6). When attaching the frame member connecting bracket 3 to the frame members 1 and 2, the two bracket bodies 30 are assembled in advance with their other end faces 3b facing each other, and then loosely fitted together with the bolt member 31 and nut member 32. This connects the two bracket bodies 30 in a state where they can move closer to and further apart in the opposing direction (the direction of extension of the bolt shaft 310). When inserting the engaging portions 34 and 35 into the grooves 12 and 22 of the frame members 1 and 2, the bracket bodies 30 are positioned closer to or further apart from each other so that the two engaging portions 34 and 35 are aligned linearly and continuously. This allows the engaging portions 34 and 35 to be smoothly inserted into the respective grooves 12 and 22 of the frame members 1 and 2. In this state, tightening the bolt member 31 and the nut member 32 brings the bracket bodies 30 closer together, and both engaging portions 34 and 35 move towards the end face of the flange 14.

[0031] On the other hand, when removing the frame member connecting bracket 3 from the frame members 1 and 2, the bolt member 31 and nut member 32 are loosened, and then both bracket bodies 30 are moved away in the direction of extension of the bolt shaft 310 until the engaging portions 34 and 35 are aligned in a straight line, thereby releasing the engagement between the engaging portions 34 and 35 and the flange 14. This allows the engaging portions 34 and 35 to be removed from the respective grooves 12 and 22 of the end face frame members 1 and 2. However, if the engaging portions 34 and 35 are firmly fitted to the flange 14, simply loosening the bolt member 31 and nut member 32 may not allow the two bracket bodies 30 to be smoothly separated. In this case, the tip of a narrow flathead screwdriver or a special removal tool is inserted into the gap between the other end face portion 3b on the inclined surface portion 3e side and the first stepped end face portion 34b, and the gap is widened to separate both bracket bodies 30 in the direction of extension of the bolt shaft 310. This allows the frame member connecting bracket 3 to be smoothly removed from the frame members 1 and 2.

[0032] A guide shaft 36 in the shape of a roughly right-angled triangular prism is provided on the side edge of the inclined surface portion 3e of the first stepped portion 301, that is, on the slanted side of the other end surface portion 3b of the main body, protruding in the same direction as the opposing direction. On the other hand, a guide groove 37 with a roughly right-angled V-shaped cross-section is formed on the inclined surface portion 3e of the first stepped portion 301, extending from one end surface portion 3a to the other end surface portion 3b and continuing in the same direction as the opposing direction.

[0033] The guide groove 37 is provided at a position where the guide shaft 36 of the other bracket body 30 is inserted and fitted when the two bracket bodies 30 are assembled. By fitting the guide shaft 36 of one bracket body 30 along the guide groove 37 of the other bracket body 30, the two bracket bodies 30 can be precisely brought closer to and further apart from each other in the butt joint direction. Furthermore, when the two bracket bodies 30 are tightened and fixed with the bolt member 31 and nut member 32, rotation of the bracket bodies 30 in the circumferential direction is prevented.

[0034] One groove bottom surface 37c of the guide groove 37 is formed on a surface substantially parallel to the first side surface 3c of the bracket body 30, and the other groove bottom surface 37d is formed on a surface substantially parallel to the second side surface 3d of the bracket body 30. The two shaft sides 36c and 36d that sandwich the right-angle portion of the guide shaft 36 are arranged in close proximity to and opposite to these groove bottom surfaces 37c and 37d.

[0035] As described above, with the frame member connecting bracket 3 of this embodiment, the first engaging portion 34 provided on one side of the other end face portion 3b of the main body is inserted into the groove portion 12 of one frame member (for example, the first frame member 1), and the second engaging portion 35 provided on the other side is inserted into the groove portion 22 of the other frame member (for example, the second frame member 2). In this state, the bolt member 31 and the nut member 32 are tightened, and the two bracket bodies 30 are brought closer together in their opposing directions, thereby fixing and holding both frame members 1 and 2 in place, thus significantly reducing the effort required for fixing.

[0036] Furthermore, when tightening the bolt member 31 and the nut member 32, the relative positions of the first engagement portion 34 and the second engagement portion 35 do not change, making it less likely for the mounting position of the bracket body 30 to the frame members 1 and 2 to shift. Therefore, the fixing work can be performed more easily and appropriately.

[0037] Furthermore, in this design, when two bracket bodies 30 are combined in opposing directions, the guide shaft 36 of one bracket body 30 is fitted along the guide groove 37 of the other bracket body 30. This allows both bracket bodies 30 to be precisely brought closer together and further apart in the buttock direction, and also prevents rotation of the bracket bodies 30 in the circumferential direction. As a result, misalignment of the bracket bodies 30 relative to the two frame members 1 and 2 is even less likely to occur. Therefore, fixing work can be performed more easily and appropriately.

[0038] Furthermore, with this design, the head portion 311 of the bolt member 31 can be engaged and held in the connecting hole portion 33 provided on one end face portion 3a of the main body, and the nut member 32 can be engaged and held in a state where rotation is prevented. Therefore, when attaching the bolt member 31 and nut member 32 to the bracket body 30, there is no need to check which bracket body 3 to attach which. Thus, the fixing work can be performed even more easily.

[0039] Furthermore, by providing a head insertion hole 41 and a nut insertion hole 42 on one end face (body end face) 3a of the bracket body 30, both bracket bodies 30 can have a common configuration, eliminating the need to check the assembly orientation of the bracket body 30. Therefore, fixing work can be performed even more easily, and the overall manufacturing cost of the frame material connecting bracket 3 can be reduced.

[0040] In the above embodiment, a configuration was described in which a pair of first engaging parts 34 and second engaging parts 35 are provided adjacent to each other on a substantially flat surface formed by the first side surface 3c of one bracket body 30 and the second side surface 3d of the other bracket body 30. However, multiple pairs of first engaging parts 34 and second engaging parts 35 may be provided adjacent to each other on the flat surface.

[0041] Furthermore, although the above embodiment describes a configuration in which the bracket bodies 30 are connected to each other by a single set of bolt members 31 and nut members 32, the bracket bodies 30 may also be configured to be connected to each other by multiple sets of bolt members 31 and nut members 32.

[0042] Furthermore, although the above embodiment described the first engaging portion 34 and the second engaging portion 35 as being formed in a substantially L-shape in cross-section, the first engaging portion 34 and the second engaging portion 35 may be formed in different shapes as long as they can properly engage with the flange portions 14 and 24 and fix and hold the frame members 1 and 2, and are not limited in any way to their shape, such as a U-shape, a T-shape, or an inclined plate shape in cross-section.

[0043] Furthermore, in the above embodiment of the frame material connecting bracket 3, when the two bracket bodies 30 are assembled as described above, the other end face portion 3b of the main body and the first stepped end face portion 34b are arranged facing each other, and a substantially Z-shaped gap is defined between the base end of the guide shaft 36 and the guide groove 37 on the inclined surface portion 3e side of the frame material connecting bracket 3. However, as shown in Figures 10 and 11, a third stepped portion 303 may be formed facing the inclined surface portion 3e side of the other end face portion 3b of the main body, and when the two bracket bodies 30 are assembled, the stepped surfaces 51 of the third stepped portion 303 may be arranged facing each other. In this design, a relatively wide, approximately I-shaped gap is defined from the base end of the guide shaft 36 to the guide groove 37 on the inclined surface 3e side of the frame member connecting bracket 3. Therefore, even a standard-sized flathead screwdriver can be inserted into the gap between the stepped surfaces 51, allowing the two bracket bodies 30 to be separated in the direction of extension of the bolt shaft 310 as described above. Thus, the frame member connecting bracket 3 can be removed more easily. [Explanation of Symbols]

[0044] 1 1st frame material 2 Second frame material 3 Frame material connecting brackets 10 Frame material side (side part) 12 grooves 14 Flange section 20 Frame material side (side part) 22 Groove 24 Flange section 30 Bracket body 31 Bolt Member 32 Nut component 33 Connection hole 3a One end of main body (one end) 3b Other end of main body (other end) 41 Head insertion hole 42 Nut insertion holes 43 Shaft insertion hole

Claims

1. A frame connecting bracket for connecting and fixing two long frame members at a right angle, Two roughly right-angled triangular prism-shaped bracket bodies, The bracket comprises a set of bolt and nut members that connect and hold the bracket bodies together, The bracket body has a shaft insertion hole extending from one end face to the other end face through which the shaft of the bolt member can be inserted, and a first engaging portion is provided on one of the two sides that straddle the right angle of the other end face, which is capable of engaging with the inner edge of a groove provided on the side surface of one of the frame members, and a second engaging portion is provided on the other side of the two sides which is capable of engaging with the inner edge of a groove provided on the side surface of the other frame member. The two bracket bodies are combined in a orientation with their other end faces facing each other, and are connected by the bolt member and the nut member so that they can move closer to and further away from each other in the opposing direction. The aforementioned bracket body is A guide shaft is provided on the slanted side of the other end face, and protrudes in the same direction as the opposing direction, The bracket body has a guide groove provided along the inclined surface portion between the slanted edges of one end face and the other end face, and extending from the slanted edge of the other end face in the same direction as the opposing direction, The guide shaft is formed in a substantially right-angled triangular prism shape and has two axial sides that sandwich the right-angle portion of the guide shaft. The guide groove is formed in a substantially right-angle V-shape in cross-section and has two groove bottom surfaces that sandwich the right-angle portion of the guide groove. A frame material connecting bracket, wherein when two bracket bodies are combined with their other end faces facing each other, the guide shaft of one bracket body is inserted into and engaged with the guide groove of the other bracket body with the side surface of the shaft facing closely toward the bottom surface of the groove.

2. The bracket body has a first side portion and a second side portion that sandwich the right-angle portion of the bracket body, One of the groove bottom surfaces of the guide groove is formed on a surface substantially parallel to the first side surface, The frame material connecting bracket according to claim 1, wherein the bottom surface of the other groove of the guide groove is formed on a surface substantially parallel to the second side surface.

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