JP2890192B1 - U-shaped long metal connection device - Google Patents

Abstract

The present invention relates to a connecting device for connecting a base member or the like having a long U-shaped end surface which hangs an opening / closing door of an automatic door device so that the opening / closing door can run freely. It is not necessary to stop, and simple and quick connection is possible only by screwing a few fastening nuts. SOLUTION: First and second U-shaped long metal materials 10A, 1A and 1A are provided.
0B is set to the end face abutting state, and the connecting back plate 11 is fitted over the pair of first and second retaining longitudinal grooves 10g and 10h. A coupling nut 13 is fitted to the coupling joint fitting 12 having a U-shaped end face, and the fastening screw 11b of the coupling back plate 11 penetrating the plurality of threaded insertion holes 12a.
Is screwed tightly. Thus, the reaction force ridges 12d projecting from the connection plate portion 12b of the connection joint fitting 12 through the through holes 11c of the connection back plate 11, the first and second U-shaped long metal materials 10A, 10B so that the connecting back plate 11 can freely contact the first and second longitudinal protrusions 10e and 10f of the first and second retaining longitudinal grooves 10g and 10h.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door device and the like, in which an opening / closing door is suspended so that it can run freely.
The required additional length is obtained by making the end faces of the U-shaped long metal material that can be used for various purposes, such as the base member attached to the blank material, etc. The present invention relates to a connection device suitable for use for firmly connecting the two U-shaped long metal members.

[0002]

2. Description of the Related Art As is well known, a long metal material having an U-shaped end face made of aluminum or the like is used in various fields, and FIG. 8 shows an example of the U-shaped long metal material. The automatic door device 1 as shown in FIG. 1 will be described. A U-shaped long metal material 4 called a base member for suspending the openable door 3 so that it can run freely is incorporated into a blind material 2 commercially available from an aluminum sash maker. Have been. At this time, rigid frames 5 on both sides
a and 5b are each pre-attached with a corner piece (not shown), and a side cover (not shown) fixed to both ends of the U-shaped long metal material 4 is bolted to the U-shaped long piece. The length metal member 4 is attached.

At this time, as shown in FIG. 8, the length L of the first U-shaped long metal material 4A to be used is compared with the length L of the blank 2 as shown in FIG.
When 1 is short, it is necessary to connect the second U-shaped long metal material 4B for replenishment of the missing dimension LS1 = S2. In addition, when the door is a tie-type opening / closing door, a long member having a length of about 5 to 6 m must be adopted as a base member. It is practically difficult to carry the metal to the installation location, and the long U-shaped metal material cut in advance in two is connected at the installation site. In addition, it cannot be loaded in a car, so that it has to be mounted and transported on a roof, and furthermore, it is necessary to protect the electronic devices incorporated in the base member from rain. In order to avoid this, or the base member is too long and heavy, it bends and warps, making it impossible to assemble to the blind material, and parts such as the motor, speed reducer and controller set on the base member In order to solve the inconvenience of having to once remove and then incorporate it into the blind material, it is necessary to connect the divided U-shaped long metal material.

[0004] As a means for connecting a long metal material having a U-shape as described above, a connecting device as disclosed in Figs. 9 and 10 has been used. Here, what is shown in FIG.
An example of the U-shaped long metal member 4 as the base member is shown. In the drawing, reference numeral 4a denotes a hanger roller 8a (see FIG. 1) in a hanger roller hanging metal fitting 8 (see FIG. 1) fixed above the opening / closing door 3. 1) shows an upper rail for suspending the vehicle so that it can run freely, and includes a bottom plate portion 4b shown in the drawing and an upper standing plate portion 4c which is bent orthogonally from both end edges in the width direction and faces each other. The U-shaped long metal member 4 is constituted by the lower standing plate portion 4d.

Then, the first and second U-shaped long metal members 4A and 4B to be added are brought into a state of abutting each other as shown in FIG. Is fitted to the joint J so as to be in a straddling state, so that the pressing plate portion 6a, the upper standing contact plate portion 6b, and the lower standing contact plate portion 6c of the joining fitting 6 are connected. Each of the first U-shaped long metal member 4A and the second U-shaped long metal member 4B is brought into contact with the bottom plate portion 4b, the upper standing plate portion 4c, and the lower standing plate portion 4d.

[0006] Then, as disclosed in FIG.
From the outside of the second U-shaped long metal members 4A and 4B, a required number of fastening screws 7 are passed through the respective communication holes 4e formed in the bottom plates 4b and 4b, respectively, to connect the above-mentioned connection fittings. By screwing into a fastening screw hole 6d threaded in the pressing plate portion 6a and connecting and connecting the connecting metal member 6 to the first and second U-shaped long metal materials, the connecting metal members 6 are connected. I have to.

[0007]

According to the above prior art, first and second U-shaped long metal members 4A and 4B which are base members in a factory as understood from FIG.
On the other hand, the communication holes 4e destined for a plurality of necessary holes must be formed by drilling, and not only that, but also the screw holes 6d to be fastened to the communication holes 4e by high-precision pitch processing. You have to do it.

According to the present invention, it is intended to solve the above-mentioned defect of the conventional connecting device. In the first aspect, the first and second U-shaped long metal materials are provided inside. With respect to the second retaining longitudinal groove, a plurality of fastening screw rods are engaged with the protruding connecting back plate in a state of being straddled, and a separately prepared connecting joint fitting is connected to the connecting plate part. The fitting nut is screwed into the fastening screw rod protruding from the screw insertion hole of the connecting joint fitting.

Further, in the above-mentioned invention, when the fastening nut is fastened, the reaction force projection provided on the connection joint fitting is provided with the first and second U-shaped via the through hole of the connection back plate. Pressing the first and second bottom plate portions of the long metal material
The connection back plate is pressed against the first and second long ridges of the first and second retaining longitudinal grooves to connect the first and second U-shaped long metal members. So that a firm fixed state can be obtained. Thus, in the present invention, it is unnecessary to perform high-precision drilling of the first and second U-shaped long metal materials as in the conventional example, or to perform consistent screwing of the screw holes for fastening to the connection joint fittings. , Trying to make that work much more efficient,
That is the purpose.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a detachable screw is screwed on the connecting joint fitting, and the screw is advanced, so that the tip end of the screw is provided. Can be pressed against the connecting back plate, so that the connecting joint fitting can be fitted over the first and second U-shaped long metal members in a state of being sufficiently strong in the straddling. It is an object of the present invention to make it possible to easily remove the connection joint metal fittings as needed, and to improve the connection strength of the first and second U-shaped long metal materials.

Further, in the case of claim 3, when the fastening nut is tightened, the reaction force projection of the connection joint is passed through a through hole formed in the connection back plate. The first and second U-shaped long metal members are pressed against each other to obtain a reaction force, while a reverse connection joint fitting is adopted, and the reaction force co-existing plate portion is By pressing against the first and second U-shaped long metal materials, the object equivalent to the first aspect is achieved, the configuration of the constituent members is simplified, and the workability is further improved. , And at a low cost.

[0012]

In order to achieve the above object, according to the present invention, the first and second bottom plates are opposed to each other by being bent orthogonally from both end edges in the width direction of the first and second bottom plates. The first and second U-shaped long metal members formed by forming a pair of first and second upright plate portions have respective end faces in abutting state, and the pair of first and second upright plate portions are provided. First and second projecting from
A pair of first and second retaining longitudinal grooves formed by the longitudinal ridges and the first and second bottom plate portions are provided with a connecting back plate provided with a plurality of required fastening screw rods. The first and second U-shaped long metal members are laid over and engaged with each other, and the connecting plate portion having a plurality of required screw insertion holes is bent orthogonally from both end edges in the width direction thereof. The joint joint fitting formed by the pair of facing parallel plate portions straddles the first and second U-shaped long metal materials so that the connection plate portion comes close to the connection back plate. The fitting screw is inserted into the screw insertion hole, and a fastening nut is screwed onto the fastening screw, thereby projecting from the connection plate portion of the connection joint fitting. The plurality of reaction force projections are formed through first and second U-shaped long metal materials through through holes formed in the connection back plate. It is characterized in that the connection back plate is pressed against a pair of first and second long ridges projecting from the first and second upright plate portions by pressing against the two bottom plate portions. To provide a connecting device for a U-shaped long metal material.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the pair of parallel plate portions formed on the connecting joint fitting is made of the first and second U-shaped long metal materials. 1st, 2nd
A screw for removal is screwed into a screw hole screwed into the connection plate of the connection joint metal fitting so as to be firmly fitted to the upright plate in a press-contact state. By screwing the tip end of the screw rod against the back plate for connection, the connection joint fitting can be forcibly detached from the first and second U-shaped long metal materials. Features.

According to a third aspect of the present invention, unlike the first and second aspects, a reverse connecting plate portion having a plurality of required reverse screw insertion holes, and an orthogonal connecting portion extending from both end edges which are the longitudinal direction thereof. The joint metal fitting for reverse connection formed by a pair of reaction force coexisting plate portions opposing each other by bending into a pair of first and second U-shaped long metal materials is provided with the pair of reaction force coexisting plate portions. Is inserted into the straddle so as to be directed to the connecting back plate, whereby the fastening screw is inserted into the screw insertion hole, and a fastening nut is screwed and fastened to the fastening screw. A pair of reaction force parallel plate portions of the reverse connection joint fitting are pressed against the first and second bottom plate portions of the first and second U-shaped long metal materials, and the connection back plate is pressed. Are configured so as to be able to press freely against a pair of first and second longitudinal projections projecting from the first and second upright plate portions. To have.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a connecting device for a U-shaped long metal material according to a first aspect of the present invention, by exemplifying a long base member in the automatic door device shown in FIGS.
As will be described in detail below, members related to the automatic door device 1 itself are denoted by the same reference numerals as those in the above-described conventional example.
That is, in FIG. 1, a U-shaped long metal material 4 called a base member for suspending the opening and closing door 3 so as to be able to run freely is incorporated into the seamless material 2 in the automatic door device 1. In the figure, 8 is a hanger roller hanging bracket, 8a is a hanger roller, and 4a is an upper rail as described above.

In the first aspect, the U-shaped long metal member 4 is formed as described with reference to FIGS.
A pair of first and second pairs of first and second bottom plates 10a and 10b that are bent orthogonally from each other and that are opposed to each other in the width direction of the first and second bottom plates 10a and 10b.
The first and second U-shaped elongated metal members 10A and 10B are formed by forming the upright plate portions 10c and 10d. Then, the first and second U-shaped long metal materials 10A and 10B
, Each end face is in a butt state as shown in FIG. 2, in which J indicates a seam as in the conventional example,
Here, the butted state is not limited to the case where the end faces are in the abutting state, but may be somewhat apart.

In the present invention, the first and second upright plate portions 10c and 10d are first provided in the first and second bottom plate portions 10c and 10d.
a, a pair of first and second long ridges 1 from near 10b.
0e and 10f are protruded, whereby the first and second U-shaped elongated metal materials 10A and 10B are provided with the first and second bottom plate portions 10a and 10b in the longitudinal direction. ,
A pair of first and second retaining longitudinal grooves 10g and 10h are formed with a uniform width by the second longitudinal protrusions 10e and 10f, respectively.

Next, in the present invention, the connecting back plate 11, the connecting joint fitting 12, and the fastening nut 13 are constituent members, and the connecting back plate 11 is, as clearly shown in FIG. A required number of fastening screws 11b projecting in an upright state by means of a plate-like back plate 11a and a bolt or the like fitted and fixed to the back plate 11a, and similarly penetrated through the back plate 11a Required through holes 11c are formed. In the illustrated example, the back plate 11a is formed to be horizontally long, and three fastening screw rods 1 are provided near each of the upper and lower sides thereof.
1b are provided, and the through-holes are arranged in a row on the axis of the back plate 11a in the horizontal direction.

Next, the connection joint fitting 12 will be described with reference to FIG. 4. As shown in FIG. 4, a plurality of required screw insertion holes 12a are used to connect the fastening screw rods 11b of the connection back plate 11 to be described later. It is formed by a connecting plate portion 12b opened in such an arrangement as to be freely insertable, and a pair of opposing parallel plate portions 12c formed by bending at right angles from both end edges in the width direction thereof. . Further, a plurality of reaction force projections 12 are also provided on the connection plate portion 12b.
d protrudes in a direction opposite to the above-mentioned parallel plate portion 12c.

Here, in the connection joint fitting 12 disclosed in FIG. 4, three screw insertion holes 12a are provided in the connection plate portion 12b in the vicinity of the pair of parallel plate portions 12c. In addition, the reaction force projection 12d is provided between the parallel plate portions 12c and is spaced apart therefrom. In the illustrated example, the reaction force projection 12d is formed in the fixing screw hole 12e threaded in the connection plate portion 12b, as shown in FIG. It is formed by screwing the screw 12f from the lower surface side as described above. Here, 12g shown in FIG. 4 (B) is a screw hole which is threaded in a line in the horizontal direction with the reaction force projection 12d, which will be clarified by the contents of the third aspect of the third aspect. .

Therefore, in order to assemble the connecting device according to the first aspect using the above-mentioned various members, it is necessary to previously engage with the first retaining longitudinal groove 10g of the first U-shaped long metal material 10A. By sliding the connecting back plate 11, the first and second U-shaped long metal materials 10A, 10A,
The seam J of B is placed in a straddling state. Next, the connecting joint fitting 12 is connected to the first and second U-shaped long metal materials 10A and 10B by the connecting plate portion 12.
b is inserted into the straddle so as to be close to the back plate 11a of the connection back plate 11 so that the fastening screw 11b protruding from the back plate 11a is inserted into the screw insertion hole 12a of the connection plate portion 12b. It is inserted.

Further, the fastening nut 13 is screwed and fastened to the fastening screw 11b protruding from the screw insertion hole 12a, so that the connecting plate portion 12 of the connecting joint fitting 12 is screwed.
b, a plurality of reaction force projections 12 d protruding from the first through the through holes 11 c provided in the back plate 11 a of the connection back plate 11.
The first and second bottom plates 10a and 10b of the second U-shaped long metal members 10A and 10B are pressed. Thus, the back plate 11a is the first and second upright plate portions 10c and 10d of the previous theory.
A pair of first and second long ridges 10e projecting from
It will be in contact with 10f. Therefore, the connecting back plate 11 is fixed to the first and second U-shaped elongated metal materials 10A and 10B, and the connecting back plate 11 is attached to the connecting back plate 11.
2, the first and second U-shaped long metal members 10A and 10B are connected to the three members described above, namely, the connection back plate 11 and the connection joint fitting 12. By means of the fastening nut 13, a strong connection state can be maintained.

As a result, according to the first aspect, the first and second U-shaped long metal materials 10A, 10A,
B, first and second retaining longitudinal grooves 10g, 10h
If the is formed by factory production, processing such as drilling at the site becomes unnecessary, and there is no need to engrave screw holes in the members used for connection, and the connection work can be completed quickly and easily. Can be.

Next, a description will be given of a connecting device according to a second aspect, which is different from the configuration of the first aspect as follows. That is, in the present invention, when the connection joint fitting 12 is fitted to the first and second U-shaped long metal materials 10A and 10B as described above, the pair of
Then, the interior is strongly fitted so that c is pressed against the first and second upright plate portions 10c and 10d of the first and second U-shaped long metal materials 10A and 10B. By doing this,
In FIG. 2, the connection joint fitting 12 completely eliminates rattling in the up-down direction, so that the connection strength can be improved.

In the present invention, of course, not only this but also FIG.
As shown in FIG. 1, the screw 1 for removal is inserted into the screw hole 12g screwed in the connection plate 12b of the joint fitting 12 for connection.
2h is screwed together. Therefore, when the connecting device is to be dismantled, if the screw 12h is detached, the screw tip 12i can be pressed against the back plate 11a of the connecting back plate 11. . As a result, the connection joint fitting 12 in the strongly fitted state can be easily forcibly detached from the first and second U-shaped elongated metal materials 10A and 10B. And that time is eliminated.

Further, the main difference between the third embodiment and the first embodiment is that the connection joint fitting 12 in the former case is different from the connection joint fitting 12 in the latter case in the reverse connection joint structure described in detail below. 14 is used. This reverse connection joint fitting 14 is shown in FIG.
As shown in FIG. 7 and FIG. 7, a reverse connection plate portion 14 b having a plurality of required reverse screw insertion holes 14 a and a right angle bent from both end edges which are the longitudinal directions to be connected,
It is formed by a pair of opposing reaction force co-existing plate portions 14c. Therefore, there is no member corresponding to the reaction force projection 12d as in claim 1, and the connecting back plate 11
Has only a fastening screw rod 11b protruding therefrom, and has no equivalent to the through hole 11c.

Therefore, according to the third aspect, when the reverse connection joint fitting 14 is assembled, the first and second U-shaped elongated metal materials 10A and 10B are attached to the reaction force coexisting plate portion 14c.
Is fitted in the straddle so as to be directed to the connecting back plate 11, so that the fastening screw 11b fits into the reverse screw insertion hole 14a, and the fastening nut 13 is screwed into the fastening screw 11b. However, the pair of reaction force co-existing plate portions 14c of the reverse connection joint fitting 14 are fixed to the first and second U-shaped long metal members 10A,
The first and second bottom plates 10a and 10b are pressed against the first and second bottom plates 10a and 10b.

Therefore, according to the present invention, the back plate 11a of the connecting back plate 11 is the first and second upright plate portions 1
0c and 10d, the pair of first and second
As a result, the connection back plate 11 and the reverse connection joint fitting 14 are brought into contact with each other by the fastening of the fastening nut 13 as in the case of the first aspect. The second U-shaped long metal members 10A and 10B are firmly connected to each other, and the same object as in claim 1 can be achieved.

[0029]

Since the present invention is constructed as described above, according to the first aspect, a connecting back plate is inserted into the first and second retaining longitudinal grooves to form a connecting joint. The first and second U-shaped long metal members can be firmly connected by merely fitting the metal fittings in the straddle and screwing and tightening the fastening nut to the fastening screw rod. Therefore, without drilling or screwing many holes and screw holes with high precision,
The base member and the like of the automatic door device can be safely operated even at a high place with extremely good workability and sufficient strength.

According to the second aspect of the present invention, the connection joint fitting can be easily and quickly removed from the first and second U-shaped long metal members by screwing the removal screw. Not only workability is good, but also the first and second
There is no problem even if the connection joint fitting is driven into the U-shaped long metal material so that it is firmly fitted inside.
The connection strength can be improved.

Then, in the case of claim 3, claim 1
As in the case of (1), it is not necessary to project a reaction force projection on the connection joint fitting or to form a through-hole in the back plate. ,
By pressing against the second U-shaped long metal material, an equivalent connected state can be obtained, so that the configuration can be simplified.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a connecting device according to claim 1 when the present invention is used for connecting a base member of an automatic door device.

FIG. 2 is a front view of an essential part of a partially cut-away portion of the connecting device shown in FIG. 1 during assembly.

3 shows a connecting back plate in the connecting device of FIG. 1,
(A) is a front view, (B) is a bottom view, and (C) is a side view.

FIG. 4 shows a connection joint fitting of the connection device;
(A) is a bottom view, (B) is a front view, and (C) is a side view.

5A and 5B show a joint fitting for reverse connection in the connecting device according to claim 2, wherein FIG. 5A is a front view and FIG. 5B is a side view.

FIG. 6 is a longitudinal sectional side view of a main part of a connecting device showing a case where the invention according to claim 3 is used for connecting a base member of an automatic door device.

FIG. 7 is an explanatory perspective view showing a connecting back plate and a reverse connecting joint fitting in the connecting device of FIG. 6;

FIG. 8 is a schematic front view showing an automatic door device in which a base member for hanging a conventional openable / closable door so as to run freely is formed by connection.

FIG. 9 is a partial perspective view showing an example of a base member schematically shown in FIG.

10A and 10B show a connection device relating to a base member schematically shown in FIG. 8, wherein FIG. 10A is a front view of a main part thereof, and FIG. 10B is a rear view of a main part thereof.

[Explanation of symbols]

 10A First U-shaped long metal material 10B Second U-shaped long metal material 10a First bottom plate portion 10b Second bottom plate portion 10c First upright plate portion 10d Second upright plate portion 10e First long ridge 10f First 2 Longitudinal ridge 10g First retaining longitudinal groove 10h Second retaining longitudinal groove 11 Connection back plate 11b Fastening screw 11c Through hole 12 Connection joint fitting 12a Screw insertion hole 12b Connection plate 12c Side plate 12d Reaction force projection 12g Screw hole 12h Removal screw rod 12j Screw rod tip 13 Fastening nut 14 Reverse connection joint fitting 14a Reverse screw insertion hole 14b Reverse connection plate part 14c Reaction force parallel plate part

Claims (3)

(57) [Claims] 1. A pair of first and second pair of first and second bottom plates that are bent orthogonally from opposite ends of the width direction of the first and second bottom plates and face each other.
The first and second U-shaped elongate metal members forming the upright plate portion have their respective end surfaces in abutting state, and the first and second U-shaped elongated metal members project from the pair of the first and second upright plate portions. A pair of first and second retaining longitudinal grooves formed by the second longitudinal ridge and the first and second bottom plate portions are provided with a connecting back plate provided with a plurality of required fastening screw rods. A connecting plate portion provided with a plurality of threaded rod insertion holes, which is straddled and engaged with the first and second U-shaped long metal materials, and bent perpendicularly from both end edges in the width direction thereof. The joint metal fitting formed by the pair of parallel plate portions facing each other is configured so that the above-mentioned connecting plate portion is close to the first and second U-shaped long metal materials and is close to the above-mentioned connecting back plate. The fitting screw is inserted into the screw insertion hole, and a fastening nut is screwed and fastened to the fastening screw. A plurality of reaction force projections projecting from the connection plate portion of the connection joint fitting are formed through first and second U-shaped long metal materials through through holes formed in the connection back plate. 1, the second back plate is pressed against the pair of first and second long ridges protruding from the first and second upright plate portions by pressing against the second bottom plate portion. A connection device for a U-shaped long metal material, characterized in that: 2. A pair of first and second pair of first and second bottom plates which are bent perpendicularly from opposite ends of the width direction of the first and second bottom plate portions and face each other.
The first and second U-shaped elongate metal members forming the upright plate portion have their respective end surfaces in abutting state, and the first and second U-shaped elongated metal members project from the pair of the first and second upright plate portions. A pair of first and second retaining longitudinal grooves formed by the second longitudinal ridge and the first and second bottom plate portions are provided with a connecting back plate provided with a plurality of required fastening screw rods. A connecting plate portion provided with a plurality of threaded rod insertion holes, which is straddled and engaged with the first and second U-shaped long metal materials, and bent perpendicularly from both end edges in the width direction thereof. The joint metal fitting formed by the pair of parallel plate portions facing each other is configured so that the above-mentioned connecting plate portion is close to the first and second U-shaped long metal materials and is close to the above-mentioned connecting back plate. And a pair of side-by-side plate portions is fitted to the first and second upright plate portions so as to be in pressure contact with each other, and a fastening nut is screwed and fastened to the fastening screw rod. Thus, a plurality of reaction force projections projecting from the connection plate portion of the connection joint fitting are connected to the first and second U-shaped long metal members through through holes formed in the connection back plate. The first and second bottom plate portions are pressed against each other, and the connecting back plate is freely pressed against a pair of first and second long ridges projecting from the first and second upright plate portions. A screw for removal is screwed into a screw hole screwed into the connection plate of the connection joint fitting, and the tip of the screw is pushed against the connection back plate by pushing in the screw for removal. A connecting device for a U-shaped long metal material, wherein the connection joint fitting can be forcibly detached from the first and second U-shaped long metal materials by being screwed in this state. 3. A pair of first and second pair of first and second bottom plates which are bent orthogonally from opposite ends of the bottom plate in the width direction and face each other.
The first and second U-shaped elongate metal members forming the upright plate portion have their respective end surfaces in abutting state, and the first and second U-shaped elongated metal members project from the pair of the first and second upright plate portions. A pair of first and second retaining longitudinal grooves formed by the second longitudinal ridge and the first and second bottom plate portions are provided with a connecting back plate provided with a plurality of required fastening screw rods. A reverse connecting plate portion having a plurality of required reverse screw insertion holes laid over and engaged with the first and second U-shaped long metal materials, and orthogonally extending from both longitudinal edges thereof. The reverse connection joint fitting formed by a pair of bent and opposed reaction force co-existing plate portions includes first and second joints.
The tightening screw is inserted into the screw insertion hole in the U-shaped long metal material by fitting the pair of reaction force parallel plates in the straddle so as to face the connection back plate. Then, by screwing a fastening nut to the fastening screw rod,
The pair of reaction force parallel plates in the reverse connection joint fitting are pressed against the first and second bottom plate portions of the first and second U-shaped long metal materials, and the connection back plate is pressed. The first and second
A connecting device for a U-shaped long metal material, which can be freely pressed against a pair of first and second long ridges protruded from an upright plate portion.