JP3554081B2 - Beam joining equipment such as fences - Google Patents

Description

[0001]
[Industrial applications]
INDUSTRIAL APPLICABILITY The present invention is preferably used for joining fences, gates, grids, handrails, etc. to a base bar as a horizontal bar or a vertical bar, and a cross bar as a vertical small bar, a horizontal small bar, or an end frame bar. The present invention relates to a beam joining device such as a fence to be obtained.
[0002]
[Prior art]
As this type of beam joining device, a pair of notch grooves which are cut out in the upright fin of the base beam so as to extend over the entire height thereof are provided with an opposing wall corresponding to the upright fin thickness and a connecting wall between the opposing walls. By press-fitting joint strips provided on both side ends so as to have a U-shape or H-shape, and holding the notched groove edges in a holding shape by opposing walls of the joint strips or Cross-bars are joined to a base bar by providing retaining means, which are known, for example, from Japanese Utility Model Laid-Open Nos. 59-138670, 59-194456, and 62-187166. .
[0003]
[Problems to be solved by the invention]
However, since the pair of cutout grooves are cut out so as to extend over the entire height of the upright fin, the upright fin is divided in the longitudinal direction, while the joint between the base bar and the cross bar is not provided. However, it is not possible to achieve a satisfactory satisfactory bonding strength because it depends only on the clamping of the edge of the notch groove by the opposing wall of the joining strip or on the stopping means additionally provided. The relative strength of the standing fins when the thickness of the base and cross bars is reduced, or when the material is changed from an extruded aluminum material to another material, such as by roll forming a thin metal plate and filling and expanding the foamed resin. May be reduced, and in these cases, it may be more difficult to secure the bonding strength.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a problem to be solved is to provide a beam joining device such as a fence which can easily and efficiently join a beam and sufficiently secure the joining strength. To be.
[0005]
[Means for Solving the Problems]
According to the present invention, in accordance with the present invention, a erected fin is provided at a depth end side of a notch groove to provide a remaining erected part, thereby preventing the fin from being separated and securing its series. On the other hand, by press-fitting the joint strip into the notch groove, the opposing wall of the joint strip clamps the edge of the notch groove and also clamps the above-mentioned remaining upright portion, thereby securing excellent joint strength and making the press-fitting possible. In order to achieve this, the connecting wall at the joint of the cross beam is partially broken, and the remaining opposing wall is disposed at the joining end of the cross beam. Is formed so as to straddle the remaining upright portion of the upright fin, and the remaining upright portion sandwiches the remaining upright portion in a front-to-rear contact shape, or has a common configuration. 1 is the standing fin of the base The joining strips, which have opposing walls corresponding to the thickness of the upright fins and connecting walls between the opposing walls, respectively, are press-fitted into the pair of notched grooves, and the connecting strips are arranged at both ends of the cross bar. In the beam joining device, the crossing bar is joined to the base beam by holding the groove edge portion in a holding state by the opposing wall of the joining strip or by applying a retaining means to the groove, A notch groove depth is set at an intermediate position of the notch height and a notch groove is provided with a remaining upright portion having a notch groove deep end portion left at the notch groove depth end side. The connecting wall is partially broken and a remaining opposing wall is provided. The remaining opposing wall is straddled by the press-fitting of the joining streak into the notch groove so as to straddle the remaining upright part, and is erected together with the notch groove edge. The remaining erected part of the fins is A second aspect of the present invention relates to a beam joining device, such as a fence, which is sandwiched in the form of a rear face contact. The clamping of the portion is performed more reliably by the opposed wall of the full width in which the area at the edge of the notch groove is enlarged to improve the joining strength. A connecting strip having an H-shaped cross section with a connecting wall disposed at an intermediate position in the width direction between the opposing walls, and holding the edges of the notch groove in a holding manner by sandwiching the edge of the notch groove with the opposing wall having an intermediate width located on one side of the connecting wall. A third aspect of the present invention relates to a beam joining device such as a fence, in which the remaining upright wall is sandwiched between the front and rear surfaces by the opposite width of the remaining opposite wall portion. The break due to the connecting wall portion where the mode of removal and the mode of the remaining mode were broken as the latter The tongue piece is used as a stopper for the joining element to further improve the joining strength, that is, the partial breakage of the connecting wall in the joining strip of claim 1 or 2 is broken. The connecting wall is left and the tongue is formed from the non-ruptured portion, and the broken tongue is disposed on the remaining opposing wall, and the broken tongue is located on one side in the longitudinal direction of the upright fin provided in the cutout groove. A beam joining device such as a fence which is formed so as to intersect with the remaining opposing wall portion at the receiving portion of the broken tongue, wherein the breaking tongue is used as a stopper for the joining element. The cross-contact is preferably performed by guiding the piece, that is, the cross-contact of the broken tongue with the remaining opposing wall in the cut-off tongue receiving portion of claim 3 is performed by using a notch groove. Intersects with the notch groove opening located at or near the broken tongue piece receiving part A beam joining device for fences or the like, characterized in that the tongue piece is guided by a tongue piece guide with an inclined or curved notch edge, and is introduced and arranged in the receiving part of the tongue piece. 5. The breakable tongue piece receiving portion used for preventing the joining element from falling down is also used as a well-fitting retaining projection receiving portion which can be easily fitted when performing a retaining measure. The tongue receiving portion is formed so as to form a widened portion that is widened to one side in the longitudinal direction of the upright fin in the depth direction of the notch groove, and the broken tongue receiving portion is partially protruded from one or both of the opposing walls of the joining strip. A beam joining device such as a fence, which is also used as a retaining projection receiving portion of a retaining means by performing a retaining operation. It was intended to be In other words, the connecting strip of the cross bar according to claim 1 has a H-shaped cross section in which a connecting wall is disposed at an intermediate position in the width direction between the opposed walls, and is formed by a protruding strip disposed at both ends of the cross bar. The joint strip is partially broken in the joint strip, and the broken connecting wall is left so as to form a tongue piece from the non-ruptured portion. In the cut-out groove, a pair of cut-out grooves are formed in the cut-out groove. The cut-out tongue piece receiving portion, which forms a widened portion, crosses and touches the remaining opposing wall portion and connects the holding shape of the cut-out groove edge of the joint strip. The remaining upright wall is sandwiched between the front and rear surfaces of the intermediate standing wall, which is located outside the wall. Detachment by partially projecting one or both opposing walls located inside the wall A beam joining device such as a fence, which is also used as a retaining projection receiving portion of the means. A seventh aspect of the present invention is to change the material of the base beam and the cross beam used for these in place of the extruded aluminum material. That is, the base beam and the cross beam of any one of claims 1 to 6 are roll-formed from an aluminum sheet material, and the upright fin is provided at the base beam, and the joining bar is provided at the cross beam. It is characterized by being formed into a hollow hollow shape and a roll forming material formed by foam-filling the hollow portion with a foaming resin, and by subjecting the roll forming material to a notch groove process or a connecting wall breaking process. The present invention is configured as a beam joining device such as a fence or the like, and these are used as means for solving the above-mentioned problems or each of the above-mentioned problems in addition to the above as the gist of the invention.
[0006]
【Example】
The present invention will be described more specifically with reference to the drawings showing the embodiments. In FIGS. 1 to 9, A is an aluminum fence, 1 is a pair of upper and lower base rails, and 2 is a base rail 1 2 shows a cross bar having a number of vertical bars which are disposed between the base bars 1 by joining the ends in the longitudinal direction.
[0007]
In the present embodiment, the base 1 and the cross 2 are formed by roll forming an aluminum sheet material to form the upright fin 10 in the base 1 and the joining bar 20 in the cross 2 to form hollow hollows. The cross-section 2 is joined to the base 1 by cutting and forming a pair of notches 13 provided in the upright fin 10 of the base 1. The joint strips 20 each having an opposing wall 21 corresponding to the thickness of the upright fin 10 and a connecting wall 22 between the opposing walls 21 and disposed at both ends of the cross beam 2 are pressed into the notch grooves 13. The edge is clamped by the opposing wall 21 of the joining strip 20 in a holding state, and furthermore, the retaining means 30 is applied to the edge. Standing up A remaining upright portion 11 having an upright fin 10 upright end portion is disposed at the depth end side of the notch groove 13 as an intermediate position of the upright height of the in 10, and the joining strip 20 is provided at a longitudinal end of the cross bar 2. The connecting wall 22 is partially broken to form a remaining opposing wall 23, and the remaining opposing wall 23 is straddled over the remaining upright portion 11 by the press-fitting of the joining streak 20 into the notching groove 13. The remaining upright portion 11 of the upright fin 10 is sandwiched by the remaining opposing wall portion 23 of the crossing bar 2 joining strip 20 in a front-to-rear contact shape while holding the 13 edges.
[0008]
At this time, in this example, the connecting strip 20 of the cross beam 2 has an H-shaped cross-section in which the connecting wall 22 is disposed at the intermediate position in the width direction between the opposing walls 21 and protrudes from both ends of the cross beam 2. The joint strip 20 is provided by a set ridge, and a partial break in the joint strip 20 is performed so that the broken connecting wall 22 remains and forms a tongue piece from the non-ruptured portion, and the remaining opposing wall portion 23 The tongue piece 24 crosses and abuts the remaining opposing wall portion 23 at the break tongue piece receiving portion 15 which forms a widened portion where the break tongue piece 24 is widened in the direction opposite to the notch groove 13. The holding portion is sandwiched by the opposed wall 21 having an intermediate width located outside the connecting wall 22, and the remaining standing portion 11 is sandwiched by the facing wall 21 over the entire width of the remaining opposed wall portion 23. And the broken tongue piece receiving portion 15 There as comprising also serves to retaining projection receiving portion of the retaining means 30 by projecting the opposing walls 21 one or both located inside the wall 22 partially.
[0009]
That is, in this example, the base bar 1 and the cross bar 2 are made of a thin aluminum plate of JISA-3004H36 which has improved mechanical strength as compared with JISA-6063T5 used for the extruded aluminum material. A 5 mm-thick aluminum sheet material is roll-formed so as to bend and join the edges at the upright fins 10 to form a bar material made of a roll-forming material suitable for use as a horizontal rail. A roll forming material suitable for use as a vertical panel having a wide panel shape by performing roll forming by using a thick aluminum sheet material so as to bend and join the edges at the joining strips 20 at one side end. In each case, urethane foam resin is injected from the remaining opening of the joint just before joining the edges in the final stage of roll forming. And, to fill the hollow portion by roll forming material inner surface and entirely bonded aluminum sheet material, there as was foam filling, for example 18 times.
[0010]
At this time, the standing fin 10 in the base 1 has the above-mentioned aluminum thin plate material having a thickness of 1.5 mm, for example, three times superposed and folded, thereby ensuring its own rigidity is improved, At the center position of the base wall of the base 1, the base 1 is vertically protruded at a height of, for example, 12 mm.
[0011]
A pair of cutout grooves 13 in the upright fin 10 are widened eccentrically in a direction facing the pair of notch grooves 13 on one side in the longitudinal direction of the upright fin 10 following the notch groove opening 14 and the notch groove opening 14. The tongue piece receiving portion 15 forming a widened portion is provided so as to have, for example, a quarter note shape, and the protruding pieces 12 are sectioned between all the notch grooves 13. With respect to the height of 12 mm, the crossing bar 2 is formed in the longitudinal direction of the upright fin 10 by notch processing with a press so as to form a residual upright portion 11 having a height of 2 mm at a depth end at an intermediate position, for example, at a depth of 10 mm. The notch groove 13 which has a number of logarithms corresponding to the number thereof and has a quarter note shape is inclined from the end of the notch groove opening 14 to an inside or outside of 10 °, for example, 9.7 °. Cut off A tongue guide 17 is provided at the notch edge 16 and in succession to the notch edge 16, which is disposed in the cut-off tongue piece receiving portion 15, and has an inclined notch edge (notch edge) crossing the notch groove opening 14. Following 17, a winding guide 18 having a radius of 1.4 mm, an opposite other side edge of the broken tongue piece receiving portion 15 being vertical, and a locking edge 19 facing the cutout groove opening 14 toward the notch groove opening 14 at the upper end thereof. In this example, the dimensions are set such that the distance from the notch groove opening 14 to the locking edge 19 is 3 mm, and the width of the winding guide 18 and the width of the locking edge 19 are 2 mm. .
[0012]
The joining strips 20 on both sides of the cross bar 2 are double-folded and folded at the front end side of the aluminum sheet material to a thickness of 0.6 mm to secure the rigidity and to secure the rigidity at the rear end side. A pair of opposing walls 21 having a distance of 1.5 mm, corresponding to the thickness of the upright fin 10, and having the same height as the standing fin 10 and having the same rigidity as a single urethane foam resin. A thin bridge-like connecting wall 22 of 0.3 mm connecting them at a widthwise intermediate position between the opposing walls 21 at the rear end of the heavy part, and projecting with a projecting width of 5 mm each so as to exhibit an H shape. It is assumed that it is disposed integrally with the crossing 2.
[0013]
At this time, the joining streak 20 is left facing at the longitudinal end of the cross bar 2 by partially breaking the connecting wall 22 by a length of 2 mm in accordance with the height of the remaining standing portion 11 in this example. It has a wall portion 23 and a tongue piece 24 arranged on the wall portion 23.
[0014]
In this example, the partial breakage of the connecting wall 22 is the same as or conforms to the shape of the cutout groove 13 of the upright fin 10, particularly from the cutout groove opening 14 in the cutout groove 13 to the lower end of the broken tongue piece receiving portion 15. A narrow groove along one side edge, in this example, a notch groove opening 14, an inclined notch edge 16, a tongue piece guide 17, and a notch groove opening 14 along one side edge extending to a winding guide 18 having a narrow groove width. This is performed by using a steel breaking mold 26 having the same thickness as the upright fin 10 having the pair of grooved cutter grooves 27 and pressing the breaking mold into the tip of the cross bar 2. As a result, the connecting wall 22 is inserted into the cutter groove 27, and is forcibly broken by the breaking force of the edge of the connecting wall 22 with the end of the opposing wall 21 to become a broken tongue piece 24.
[0015]
At this time, since the cutter groove in the mold 26 of the present example is formed in an inwardly curved shape curved in the facing direction, the fractured tongue piece 24 is slightly restored after the fracture is completed, but is deformed into a curl shape. The cutter groove 27 is provided with a bent portion 28 for correcting the broken tongue piece 24 at an intermediate position in the depth direction of the cutter groove 27 so as to return it almost completely to the position before the break, that is, the position of the connecting wall 22 in the joint strip 20. This allows the curl-like deformation of the fractured tongue piece 24 to be corrected, and the tip of the fractured tongue piece 24 can be inserted into the notch groove 13 when the joining strip 20 is pressed into the pair of notch grooves 13 of the upright fin 10. It is made to become.
[0016]
The base bar 1 and the cross bar 2 configured as described above are erected on the base bar 1 such that the leading ends of the joining strips 20 are straddled in the notched grooves 13 of the erected fins 10 so as to straddle the remaining erected portions 11 and receive the projecting pieces 12. The edge of the non-opposite side of the notch groove 13 is formed by the intermediate width opposing wall 21 located outside the connecting wall 22 at the tip of the joint strip 20 by being pressed into the base wall of the fin 10 protrudingly. The remaining upright portion 11 is sandwiched between the front and rear surfaces of the remaining upright portion 23 by the entire width of the opposing wall 21 of the remaining opposing wall portion 23, and the broken tongue piece 14 is inserted into the broken tongue piece receiving portion 15. It is introduced and arranged by the one-side guide 17, and cross-contacts the remaining opposing wall 23, particularly the opposing wall 21, at the broken tongue receiving portion 15.
[0017]
At this time, the broken tongue piece 24 enters the notch groove 13 in the state of remaining broken by the press-fitting, crosses the above-mentioned tongue piece guide 17 in an abutting manner, and moves toward the inside of the broken tongue piece receiving portion 15 widened in the opposite direction. While being jumped out in a bent shape, the tip is guided by the winding guide 18 so as to make the above-mentioned cross-contact in the broken tongue piece receiving portion 15 along the lower end edge thereof. In addition to clamping the edge of the notch groove 13 and the remaining upright portion 11 respectively, the joining strip 20 is prevented from falling.
[0018]
In this way, the edge of the notch groove 13 and the remaining upright portion 11 are clamped, and the tongue 24 is used to prevent slipping, so that the cross beam 2 which is firmly joined to the base beam 1 and has rigidity itself is further press-fitted. In this state, the above-mentioned retaining means 30 is applied to further improve the joining strength and constitute the fence A.
[0019]
In this example, the retaining means 30 is adapted to partially project both of the opposing walls 21 located inside the connecting wall 22 of the joining strip 20 to the fracture tongue piece receiving portion 15 which also serves as the retaining projection receiving portion. By applying punching, the space between the breaking tongue piece 24 and the locking edge 19 for preventing the punching projection from falling along its lower edge is filled, and the joining strip 20 is fixed to the notch groove 13 to prevent it from coming off. There is something to do.
[0020]
In the drawing, reference numeral 25 denotes a projecting piece 12 which is provided so that the tip of the cross bar 2 is removed in a rectangular shape, a semi-circular shape, or the like by using, for example, a vibration cutter or a circular cutter, so that the projecting piece 12 can be easily received without any resistance. This is a slit-shaped resin removing portion for receiving the slab and along the thickness of the protruding piece 18.
[0021]
10 and 11 show another example, and FIGS. 10 and 11 show that the broken tongue piece receiving portion 15 in the notch groove 13 is positioned so as to widen to one side in the longitudinal direction of the upright fin 10, and particularly a pair of notch grooves. 13 in a non-opposite direction, a quarter note shape or an ax shape in which the installation of the winding guide 18 is omitted, and the broken tongue piece 24 is received in the broken tongue piece receiving portion 15 in a curved shape by the tongue piece guide 17. Further, the notch projection is partially projected into the break tongue piece receiving portion 15 by making the notch means 30 outside the connecting wall 22 of the joining streak 20 by making a break notch by pressing both of the opposing walls located outside the connecting wall 22. FIG. 12 shows an example in which the breaking tongue piece 24 of the breaking tongue piece receiving portion 15 is arranged such that the winding guide 18 has a C-shape, and a winding end 18 'is provided at the end thereof. The notch 13 has a shape similar to a quarter note For example, FIG. 13 shows that the tongue piece guide 17 has a curved shape with a large diameter, and the fractured tongue piece receiving portion 15 has a groove shape having the tongue piece guide 17 in the vicinity. This is an example in which the receiving portion 17 'is used, and the other portions are configured in the same manner as in the above-described example.
[0022]
The joining of the cross bar 2 to the base bar 1 according to the above example can be performed with a relatively small press-fitting pressure of, for example, about 10 kg to 20 kg per one joint. The joint strength of the cross bar 2 with respect to the base bar 1 is also strong enough to withstand withdrawal of, for example, 60 kg / piece per one place. There was no good appearance.
[0023]
Although the illustrated example is as described above, in the practice of the present invention, the crossing bar is joined to the base bar by press-fitting with or without the locking device provided with the locking device. That the connecting strip is formed in a U-shape, that the connecting strip is partially protruded at both ends of the crossing bar, or that it is recessed at both ends, and that the connecting wall is partially broken To form the remaining opposing wall by breaking off at the longitudinal end of the cross bar, making the notched groove a crescent-shaped or other narrow groove, and swelling the tip when installing the broken tongue piece receiving part. The base and / or the cross bar are formed of a hollow aluminum extruded material, the retaining means is provided on one of the opposing walls, and the frame is joined by joining the cross bar to the base bar. Composed and gates other than fence , Surface grids, handrails, etc., it is possible to use the base bar as a vertical bar, the cross bar as a horizontal bar or a horizontal bar, etc. Is the specific material and shape of the base bar, standing fins, notched grooves, remaining standing portions, cross bars, joining strips, remaining opposing walls, break tongue pieces to be installed as necessary, break tongue piece receiving portions, retaining means, etc. , Structure, dimensions, numbers, their relationships, and additions to them can be variously changed without departing from the gist of the invention.
[0024]
【The invention's effect】
Since the present invention is configured as described above, a first aspect of the present invention is to provide a remaining upright portion by leaving an upright fin upright end portion on the deep end side of the notch groove to prevent the upright fin from being divided. While ensuring the series, the press-fitting of the joint strip into the notch groove allows the opposing wall of the joint strip to clamp the edge of the notch groove and also clamp the above-mentioned remaining upright part, thereby achieving excellent joint strength. It is possible to provide a beam joining device such as a fence which can ensure the above-mentioned press-fitting with as small a press-fitting pressure as possible.
[0025]
In addition to the above, in addition to the above, the strength of the opposing strip is improved to more reliably hold the notch edge, and the remaining upright portion is gripped by the opposite width of the entire width of the notch groove. Thus, the bonding strength can be improved and the bonding strength can be improved.
[0026]
According to the third aspect, in addition to the above, it is possible to further improve the joining strength by using a tongue piece formed by the broken connecting wall portion and using the tongue as a stopper for the joining element.
[0027]
According to a fourth aspect of the present invention, in addition to the above, the breaking tongue can be suitably performed to guide the breaking tongue by conducting the breaking tongue.
[0028]
In addition to the above, in addition to the above, the break tongue piece receiving portion used for preventing the tongue piece from falling down of the joining element can also be used as a well-fitting protrusion receiving portion that can be easily accommodated in performing the removal prevention measure. it can.
[0029]
According to claim 6, in addition to the above, it is possible to provide a preferable embodiment which is excellent in bonding strength and appearance and has each of the above features.
[0030]
According to a seventh aspect of the present invention, the material of the base beam and the cross beam used for these components can be changed in place of the extruded aluminum material.
[Brief description of the drawings]
FIG. 1 is a front view of a fence. FIG. 2 is an enlarged front view showing a joint portion between a base bar and an intersection bar. FIG. 3 is a cross-sectional view taken along a line AA in FIG. 2 FIG. FIG. 5 is an enlarged front view of the standing fin. FIG. 6 is an enlarged cross-sectional view of the crossing bar. FIG. 7 is an enlarged front view showing the relationship between the notch groove and the joining strip. FIG. 9 is a plan view showing the relationship between a cross bar and a breaking die. FIG. 10 is an enlarged cross-sectional view showing another example. FIG. 11 is an enlarged front view showing another example. FIG. 13 is an enlarged front view showing another example. FIG. 13 is an enlarged front view showing another example.
A fence 1 base bar 2 cross bar 3 foam resin 10 standing fin 11 remaining standing portion 13 notch groove 15 break tongue piece receiving portion 17 tongue piece guide 20 joining strip 21 facing wall 22 connecting wall 23 remaining facing wall portion 24 breaking tongue piece 30 Retaining means

Claims (7)

A pair of notches provided in the upright fins of the base rail, each having an opposing wall corresponding to the thickness of the erecting fin and a connecting wall between the opposing walls. In which the crossing bar is joined to the base beam by press-fitting and holding the notch groove edge in a holding shape with the opposing wall of the joining streak or by applying a retaining means thereto. A remaining upright portion is provided in the upright fin so that the upright fin upright end is left at the notch groove depth end with the notch groove depth being an intermediate position of the upright fin upright height. At the tip end, a remaining opposing wall portion in which the connecting wall of the joining strip is partially broken is provided, and the remaining opposing wall section is straddled by the press-fitting of the joining strip into the notch groove so as to straddle the remaining upright portion. The remaining standing part of the standing fins is clamped along with the edge, Crosspiece coupling device fences or the like which characterized by being clamped around the interview form by opposing wall. The connecting strip of the cross bar according to claim 1 is a connecting strip having an H-shaped cross section in which a connecting wall is disposed at a middle position in the width direction between the opposing walls, and the notch-shaped edge of the notch groove is held inside and outside the connecting wall. A cross-joining device for fences or the like, characterized in that it is carried out by an opposing wall of an intermediate width located on one side, and sandwiching the remaining standing wall in a front-to-rear plane is carried out by the opposing wall having the entire width of the remaining opposing wall. A partial breakage of the connecting wall in the joint strip according to claim 1 or 2 is performed so that the broken connecting wall remains to form a tongue from a non-ruptured portion, and a broken tongue is disposed on the remaining opposing wall. A beam joining device for fences or the like, wherein the broken tongue is cross-connected to a remaining opposing wall portion at a broken tongue piece receiving portion located on one side in the longitudinal direction of an upright fin provided in a cutout groove. An inclined or curved notch which intersects the crossing contact of the broken tongue with the remaining opposing wall portion in the broken tongue receiving portion of claim 3 or the cutout groove opening provided in or near the broken tongue receiving portion of the cutout groove. A beam joining device such as a fence, wherein the tongue piece is guided into the broken tongue piece receiving portion by a tongue piece guide by an edge. 5. The broken tongue piece receiving portion according to claim 3 or 4 is formed so as to form a widened portion which is widened to one side in the longitudinal direction of the upright fin with the depth direction of the notch groove, and the broken tongue piece receiving portion is formed on one of opposing walls of the joining strip. Alternatively, a beam joining device such as a fence, which is also used as a retaining projection receiving portion of retaining means by partially projecting both. The connecting strip of the cross bar according to claim 1 is a connecting strip formed by ridges having a H-shaped cross section with a connecting wall disposed at an intermediate position in the width direction between the opposing walls and projecting from both side ends of the cross bar. The joint strip is partially broken to form a tongue from the non-ruptured portion with the broken connecting wall remaining, and a broken tongue is disposed on the remaining opposing wall, and the broken tongue is cut into a notch groove. The cut-out tongue piece receiving portion forming a widened portion widened in the direction opposite to the pair of notch grooves intersects with the remaining opposing wall portion and holds the notch groove edge of the joint strip outside the connecting wall. The remaining upright wall is sandwiched between the front and rear surfaces of the intermediate wall, the front and rear surfaces are sandwiched by the opposite width of the remaining opposing wall, and the receiving portion of the broken tongue is placed inside the connecting wall of the joint strip. Removal of the retaining means by partially protruding one or both of the located opposing walls Crosspiece coupling device fences, etc., characterized by comprising also serves to cause the receiving portion. The base beam and the cross bar according to any one of claims 1 to 6, which are formed into a hollow hollow shape by forming an upright fin at the base bar and a joining strip at the cross bar by roll forming an aluminum sheet material. A cross-joining device for a fence or the like, characterized in that a roll-forming material is formed by foam-filling a portion with a foaming resin, and the roll-forming material is formed by performing a notch groove process or a connecting wall breaking process.

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