JP2022083849A - Connecting metal fitting - Google Patents

Abstract

To provide a connecting metal fitting that facilitates installation work and is designed to improve versatility of joists.SOLUTION: In a connecting metal fitting 10 for connecting a sleeper 3 and a joist 2 which constitutes a structure 9 installed at a civil engineering work site or the like, a body 5 and a pin 7 for positioning the body 5 on the sleeper 3 are provided. The body 5 is U-shaped upwardly viewed in a direction of extension of the joist 2, and has a joist fitting surface 50a comprising a pair of opposing joist walls 51a,51a spaced apart corresponding to a width of the joist 2 and a joist support surface 52a for connecting the pair of joist walls 51a,51a to support the joist 2. The joist support surface 52a is provided with at least two metal fitting-side insertion holes 521 spaced apart in the direction of extension of the joist 2 and penetrating in the vertical direction. The pin 7 is positioned on the sleeper 3 by being inserted into the metal-fitting side insertion holes 521 and sleeper-side insertion holes 312 formed in the sleeper 3.SELECTED DRAWING: Figure 2

Description

The present invention relates to a connecting metal fitting for connecting a large pull and a joist, which constitutes a gantry provided at a civil engineering site or the like.

At civil engineering sites, etc., a gantry will be provided for vehicles and heavy machinery to pass through. This gantry is a temporary gantry and is also used as a temporary storage place for scaffolding and various materials.

The gantry has a large number of columns erected at intervals in the left-right and front-rear directions, the adjacent columns are connected by horizontal members, and the horizontal members are connected by braces. Further, a large underwriting is attached to the upper end of the column, and a large underwriting (beam) is hung between adjacent large underwritings in a state where both ends thereof are supported by the large underwriting. A plurality of joists are arranged at predetermined intervals in the longitudinal direction of the large pull between adjacent large pulls, and the joists are provided with scaffolding boards constituting the floor surface, for example, wooden or FRP (fiber reinforced plastic). Floor panels made of plastic, etc. are installed (see, for example, Patent Document 1 and the like). The floor panel is fixed to the support column by using, for example, the fixing metal fittings disclosed in JP-A-2018-9412. Here, as a structure for connecting the joists to the joists, for example, a structure is adopted in which a pin is provided on the joists by welding and the pins are inserted into the insertion holes formed in the joists.

Japanese Unexamined Patent Publication No. 2019-085696

However, there are many cases where the position of the pin is not matched to the position of the large pulling insertion hole due to the manufacturing variation of the position where the pin is provided on the joist. In such a case, it is necessary to take measures such as tying them with a wire or a binding wire such as a thin wire, which makes the work complicated. Further, the joist provided with the pin has a problem that it is inferior in versatility because it becomes a member dedicated to the gantry having the same structure.

In view of the above circumstances, it is an object of the present invention to provide a connecting metal fitting that facilitates installation work and is devised to improve the versatility of joists.

The connecting metal fitting of the present invention for solving the above object is a connecting metal fitting for connecting a large pull and a joist extending in a direction orthogonal to the large pull, which constitutes a gantry provided at a civil engineering site or the like.
A main body and a pin for positioning the main body in the large pull are provided.
The main body has an upward U-shape when viewed in the extending direction of the joist, and connects a pair of joist wall surfaces facing each other at intervals corresponding to the width of the joist and the pair of joist wall surfaces. It has a joist fitting surface composed of a joist support surface that supports the joist.
The joist support surface is formed with at least two metal fitting side insertion holes that penetrate in the vertical direction at intervals in the extending direction of the joist.
The pin is inserted into the metal fitting side insertion hole and the large pull side insertion hole formed in the large pull, so that the pin is positioned in the large pull.

Here, the large pull extends along a support portion having a square cylinder shape and both end portions in the longitudinal direction are supported by the large underwriter and on which a joist is placed, and a support portion below the support portion. It may be provided with a reinforcing portion and a plurality of connecting plates for connecting the supporting portion and the reinforcing portion. Further, the joist may be a square pipe.

According to the connecting metal fitting of the present invention, since the pin is inserted into the metal fitting side insertion hole of the main body and the large pull side insertion hole formed in the large pull, it is necessary to provide a pin on the joist. Due to manufacturing variations in the positions where the pins are provided on the joists, it is not necessary to tie them up with a binding wire. Further, since it is not necessary to provide a pin on the joist, it is possible to solve the problem that the member is dedicated to the gantry having the same structure and is inferior in versatility.

Further, in the connecting metal fitting of the present invention, the main body has a downward U-shape when viewed in the extending direction of the large pull, and a pair of large references facing each other at intervals corresponding to the width of the large pull. It may have a large pull fitting surface including a wall surface and a large pull placement surface that connects the pair of large reference wall surfaces and is placed on the large pull.

If the aspect having the large pull fitting surface is adopted, the positional deviation between the main body and the large pull is less likely to occur, and the connected state between the large pull and the joist can be further stabilized.

Further, in the connecting metal fitting of the present invention, the main body is composed of an upper metal fitting that constitutes the joist fitting surface and a lower metal fitting that constitutes the large pull fitting surface and is separate from the upper metal fitting. One embodiment is also one of the preferred embodiments.

If the main body adopts an aspect including the upper metal fitting and the lower metal fitting, it becomes easy to cope with the variation of the outer size of the joist and the large pull. For example, when the outer diameter size of the joist changes, only the upper metal fitting needs to be changed, and when the outer diameter size of the large pull changes, only the lower metal fitting needs to be changed.

Further, in the connecting metal fitting of the present invention, the large pull and the joist are made of square pipes having the same outer diameter size.
The upper metal fitting and the lower metal fitting may have the same structure except for the metal fitting side insertion hole.

If this aspect is adopted, the same member can be used for the upper metal fitting and the lower metal fitting only by changing the position of the metal fitting side insertion hole, and the number of member points can be suppressed.

According to the present invention, it is possible to provide a connecting metal fitting that facilitates the installation work and is devised to improve the versatility of the joist.

It is a figure which shows the gantry to which the connecting metal fitting of this invention is applied. (A) is an enlarged view showing a portion A surrounded by an ellipse of a two-dot chain line in FIG. 1, and (b) is a view of (a) viewed from the right side or the left side. It is a top view which shows the process of attaching a connecting metal fitting step by step to the large pull shown in FIG. It is a figure which shows the state of connecting a joist and a large pull using the connecting metal fitting of the 2nd Embodiment. It is a figure which shows the state of connecting a joist and a large pull using the connecting metal fitting of the third embodiment. FIG. 5 is a diagram showing a state in which a joist and a large pull are connected by using a connecting metal fitting of a modified example of the third embodiment shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a gantry 9 to which the connecting metal fitting 10 of the present invention is applied.

As shown in FIG. 1, the gantry 9 provided at a civil engineering site or the like has an inclined floor surface (slope S) and a horizontal floor surface (horizontal plane L). Further, the gantry 9 has a plurality of columns 91 erected at intervals in the left-right direction and the front-rear direction (direction orthogonal to the paper surface), a horizontal member 92 connecting adjacent columns 91, and a predetermined horizontal member 92. It has a brace material 93 that connects the two. Further, a large underwriter 94 is attached to the upper end of the support column 91. Between the adjacent large underwriters 94, the large underwriting 3 extending in the left-right direction is hung in a state where both ends thereof are supported by the large underwriting 94. Further, on the large pull 3, a predetermined interval (for example, 300 mm to 350 mm interval) is provided in the extending direction (longitudinal direction), and the joist 2 is orthogonal to the extending direction of the large pull 3 (front and back). In a state extending in the direction), they are connected by the connecting metal fitting 10 (see FIG. 2 and the like) of the present invention, which will be described in detail later. The joist 2 is, for example, a prismatic one made of a square pipe having an outer diameter of 60 mm square. Floor panels 95 constituting the floor surface are installed on the large pull 3 and the joist 2. Although the figure in which the columns 91 are erected at intervals in the front-rear direction is omitted, the horizontal member 92, the brace member 93, and the large underwriting 94 are provided in the same manner as in the left-right direction.

FIG. 2A is an enlarged view showing a portion A surrounded by an ellipse of the two-dot chain line in FIG. 1. Further, FIG. 2B is a view of FIG. 2A as viewed from the right side or the left side. In FIG. 2A, the left-right direction is the extending direction of the large pull 3, and in FIG. 2B, the direction orthogonal to the paper surface is the extending direction of the large pull 3. Since the joist 2 extends in the direction orthogonal to the large pull, in FIG. 2B, the left-right direction is the extending direction of the joist 2. In FIG. 2, the floor panel 95, the large underwriting 94, and the like shown in FIG. 1 are omitted in order to simplify the space, and the same applies to the following drawings.

In the present embodiment, for example, a square pipe having an outer diameter of 60 mm square is used as the joist 2. Further, the large pull 3 is not particularly limited, but in the present embodiment, both ends of the square cylinder shape (left-right direction in FIG. 2A) are large underwriting 94 (see FIG. 1). A support portion 31 on which the joists 2 are placed via a connecting metal fitting 10, a reinforcing portion 32 extending along the support portion 31 below the support portion 31, and a support portion 31 and a reinforcing portion. The one provided with a plurality of connecting plates 33 for connecting to 32 is adopted. The support portion 31 is provided with a reinforcing rib 311 erected in a central portion in the width direction orthogonal to the extending direction of the large pull 3.

As shown in FIG. 2A, the joists 2 are orthogonal to the extending direction of the large pull 3 with a predetermined interval (for example, 300 mm to 350 mm intervals) on the large pull 3 in the extending direction. It is connected by the connecting metal fitting 10 in a state of extending in the direction. The connecting metal fitting 10 includes a main body 5 and a pin 7 for positioning the main body 5 in the large pull 3.

In FIGS. 2 (a) and 2 (b), the main body 5 has an upward U-shape when viewed in the extending direction of the joist 2, as shown by enclosing it in a square of the alternate long and short dash line. It has a pair of joist wall portions 51, 51 facing each other at intervals corresponding to the width of the joist 2, and a joist support portion 52 connecting the pair of joist wall portions 51, 51 to support the joist 2. .. Each of the inner surfaces of the pair of joist wall portions 51, 51 constitutes a joist wall surface 51a, and the upper surface of the joist support portion 52 constitutes a joist support surface 52a. The pair of joist wall surfaces 51a and 51a and the joist support surface 52a form an upward U-shaped joist fitting surface 50a. That is, the main body 5 has an upward U-shape when viewed in the extending direction of the joist 2, and has a pair of joist wall surfaces 51a and 51a facing each other at intervals corresponding to the width of the joist 2 and a pair of joists. It has a joist fitting surface 50a composed of a joist support surface 52a that connects the wall surfaces 51a and 51a and supports the joist 2.

Further, the joist support portion 52 is formed with two metal fitting side insertion holes 521 and 521 that penetrate in the vertical direction at intervals in the extending direction of the joist 2 (left-right direction in FIG. 2B). .. That is, the joist support surface 52a is formed with two metal fitting side insertion holes 521 and 521 that penetrate in the vertical direction at intervals in the extending direction of the joist 2.

FIG. 3 is a plan view showing a stepwise step of attaching the connecting metal fitting 10 to the large pull 3 shown in FIG.

FIG. 3A is a top view of the large pull 3 before attaching the connecting metal fitting 10. On the upper surface of the support portion 31 in the large pull 3, two large pull side insertion holes 312 are formed at predetermined intervals in the extending direction of the large pull 3 (left-right direction of the paper surface).

First, as shown in FIG. 3B, the main body 5 is arranged on the large pull 3 with its two metal fitting side insertion holes 521 and 521 aligned with the two large pull side insertion holes 312 and 312. Next, the pin 7 is inserted into the metal fitting side insertion hole 521 of the main body 5 and the large pull side insertion hole 312 of the large pull 3 to bring about the state shown in FIG. 3 (c). As a result, the main body 5 is positioned on the large pull 3, and the attachment of the connecting metal fitting 10 to the large pull 3 is completed.

Then, if the joist 2 is fitted into the main body 5, as shown in FIG. 2, the joist 2 is fitted to the joist fitting surface 50a, and the joist 2 and the large pull 3 can be connected. As described above, according to the connecting metal fitting 10 of the present embodiment, the joist 2 and the large pull 3 can be connected with an extremely simple operation. Further, since the pin 7 is configured to be inserted into the metal fitting side insertion hole 521 of the main body 5 and the large pull side insertion hole 312 (see FIG. 3A) of the large pull 3, the pin 7 is pinned to the joist 2 as in the conventional case. There is no need to provide. This eliminates the need for binding using a binding wire due to manufacturing variations in the positions where the pins are provided on the joists 2. Further, since it is not necessary to provide a pin on the joist 2, it is possible to solve the problem that the joist 2 becomes a member dedicated to the gantry having the same structure and is inferior in versatility.

In addition, as shown in the main body 5'enclosed by the square of the alternate long and short dash line in FIG. May be adopted to make the above stable.

Next, another embodiment of the connecting metal fitting 10 of the first embodiment shown in FIGS. 2 and 3 will be described. In the other embodiments described below, the differences from the first embodiment shown in FIGS. 2 and 3 will be mainly described, and the names of the components in the first embodiment shown in FIGS. 2 and 3 will be the same. The components of the name will be described with the reference numerals used so far, and duplicate explanations may be omitted.

FIG. 4 is a diagram showing a state in which the joist 2 and the large pull 3 are connected by using the connecting metal fitting 11 of the second embodiment. Note that FIG. 4A is a diagram showing a state corresponding to FIG. 2A, and FIG. 4B is a diagram showing a state corresponding to FIG. 2B.

The structure of the main body 5 of the connecting metal fitting 11 of the present embodiment is different from that of the first embodiment. In FIGS. 4 (a) and 4 (b), as shown in an enlarged manner surrounded by a square chain line, the main body 5 of the present embodiment is from both ends in the extending direction of the joist 2 in the joist support portion 52. It has a pair of large cited wall portions 53, 53 that hang down and face each other at intervals corresponding to the width of the support portion 31 of the large pull 3. Each of the inner surfaces of the pair of large quotation wall portions 53, 53 constitutes a large quotation wall surface 53b, and the lower surface of the joist support portion 52 constitutes a large loading surface 52b. The large pull fitting surface 50b is formed by the pair of large reference wall surfaces 53b and 53b and the large placement surface 52b. That is, the main body 5 of the present embodiment has a downward U-shape when viewed in the extending direction of the large pull 3 in addition to the joist fitting surface 50a, and has an interval corresponding to the width of the large pull 3. A device having a large pull fitting surface 50b including a pair of large reference wall surfaces 53b and 53b facing each other and a large pull mounting surface 52b connected to the pair of large reference wall surfaces 53b and 53b and mounted on the large pull 3. Is. The metal fitting side insertion hole 521 of the present embodiment penetrates from the joist support surface 52a to the large loading surface 52b.

According to the connecting metal fitting 11 of the present embodiment, since the large pull fitting surface 50b is fitted to the support portion 31 of the large pull 3, the connected state of the joist 2 and the large pull 3 can be made more stable. In this embodiment, the embodiment used for the joist 2 and the large pull 3 having the same outer diameter size has been described as an example, but it is of course possible to use the joist 2 and the large pull 3 having different outer diameter sizes.

FIG. 5 is a diagram showing a state in which the joist 2 and the large pull 3 are connected by using the connecting metal fitting 12 of the third embodiment. Note that FIG. 5A is a diagram showing a state corresponding to FIG. 4A, and FIG. 5B is a diagram showing a state corresponding to FIG. 4B.

The connecting metal fitting 12 of the present embodiment is different from the connecting metal fitting 11 of the second embodiment shown in FIG. 4 in that the main body 5 is composed of the upper metal fitting 5A and the lower metal fitting 5B.

In FIGS. 5 (a) and 5 (b), as shown in an enlarged manner surrounded by a square chain line, the main body 5 of the present embodiment includes the upper metal fitting 5A constituting the joist fitting surface 50a and a large pull. It constitutes a fitting surface 50b and is composed of a lower metal fitting 5B that is separate from the upper metal fitting 5A.

The support portion 31 of the large pull 3 in the present embodiment adopts a square pipe having the same outer diameter size (for example, 60 mm square) as the joist 2. Therefore, the upper metal fitting 5A and the lower metal fitting 5B have the same structure except for the metal fitting side insertion hole 521. That is, the lower metal fitting 5B is a member having the same structure as the upper metal fitting 5A except for the metal fitting side insertion hole 521, inverted, and fitted to the support portion 31 of the large pull 3 in a state of being rotated 90 degrees in a plan view. Is. In the upper metal fitting 5A, two metal fitting side insertion holes 521 are formed at intervals in a direction orthogonal to the direction in which the pair of joist wall portions 51, 51 face each other. On the other hand, in the lower metal fitting 5B, two metal fitting side insertion holes 521 are formed at intervals in the directions in which the pair of large cited wall portions 53, 53 face each other.

FIG. 6 is a diagram showing a state in which the joist 2 and the large pull 3 are connected by using the connecting metal fitting 13 of the modified example of the third embodiment shown in FIG. Note that FIG. 6A is a diagram showing a state corresponding to FIG. 5A, and FIG. 6B is a diagram showing a state corresponding to FIG. 5B.

In this modification, a square pipe having a large outer diameter (for example, 100 mm square) is used for the joist 2. That is, the outer diameter size of the joist 2 and the outer diameter size of the support portion 31 of the large pull 3 (for example, 60 mm square) are different.

Therefore, in FIG. 6A, as shown in an enlarged view surrounded by a square of the alternate long and short dash line, the upper metal fitting 5A'of this modified example corresponds to the outer diameter size of the joist 2 and is a pair of wall surfaces for joists. The distance between 51a and 51a is wide (for example, 100 mm).

As shown in FIGS. 5 and 6, the main body 5 of the connecting metal fittings 12 and 13 of the third embodiment is composed of an upper metal fitting 5A and a lower metal fitting 5B. Therefore, it becomes easy to correspond to the variation of the outer size of the joist 2 and the large pull 3. For example, when the joist 2 having a large outer diameter size is adopted, it may be changed to the upper metal fitting 5A'corresponding to the joist 2 as shown in FIG. Further, as shown in FIG. 5, when the outer sizes of the joist 2 and the large pull 3 are the same, the same member can be used for the upper metal fitting 5A and the lower metal fitting 5B only by changing the position of the metal fitting side insertion hole 521. It is possible to reduce the number of members.

According to the connecting metal fittings 10, 11, 12, and 13 of the present invention, it is possible to provide a connecting metal fitting that facilitates the installation work and is devised to improve the versatility of the joist.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, in the above-described embodiment, the large pull 3 has been described with a square cylindrical support portion 31, a reinforcing portion 32, and a connecting plate 33, but the reinforcing portion 32 and the connecting plate 33 are provided. You may adopt no big draw. Further, in the above-described embodiment, the main body 5 is formed with two metal fitting side insertion holes 521, but three or more metal fitting side insertion holes 521 may be formed. Further, in the above-described embodiment, the aspect of the horizontal floor surface (horizontal plane L) portion in the gantry 9 shown in FIG. 1 has been described, but of course, it can also be applied to the inclined floor surface (slope S) portion. Since the connecting metal fitting 10 of the present invention has a structure in which the pin 7 is inserted into the large pull side insertion hole 312 formed in the large pull 3, even if it is applied to the inclined floor surface (slope S) portion, the joist 2 It is possible to effectively prevent misalignment and the like.

It should be noted that even if the constituent requirements are included only in the description of each of the above-described embodiments and modifications, the constituent requirements may be applied to other embodiments and modifications.

10, 11, 12, 13 Connecting metal fittings 2 Joist 3 Large pull 31 Support part 32 Reinforcing part 33 Connecting plate 5 Main body 5A Upper metal fitting 50a Joist fitting surface 51a Joist wall surface 52a Joist support surface 5B Lower metal fitting 50b Large pull fitting surface 52b Large loading surface 53b Large quoted wall surface 521 Metal fitting side insertion hole 7 pin 9 gantry

The present invention relates to a connecting metal fitting for connecting a large pull and a joist, which constitutes an inclined floor surface portion of a gantry provided at a civil engineering site or the like.

In view of the above circumstances, the present invention facilitates the installation work, improves the versatility of the joists , and can effectively prevent the joists from slipping even when applied to a sloping floor surface. It is an object of the present invention to provide a connecting metal fitting made of.

The connecting metal fitting of the present invention that solves the above object is inclined in the extending direction and is formed in the central portion in the width direction orthogonal to the extending direction, which constitutes the inclined floor surface portion of the gantry provided at the site of civil engineering work or the like. A large pull having an erected reinforcing rib and a square tubular support portion having two large pull side insertion holes formed side by side in the width direction on the upper surface and extending in a direction orthogonal to the large pull. In the connecting bracket that connects to the root
A main body and a pin for positioning the main body on the support portion of the large pull are provided.
The main body has an upward U-shape when viewed in the extending direction of the joist, and has a pair of joist wall surfaces facing in the direction in which the joist is inclined at intervals corresponding to the width of the joist. It has a joist fitting surface composed of a joist support surface that connects the pair of joist wall surfaces and supports the joist.
The joist support surface is formed with two metal fitting-side insertion holes that penetrate in the vertical direction at intervals in the direction in which the joist extends and is orthogonal to the direction in which the pair of joist wall surfaces face each other . It is a thing
The pin is inserted into the two metal fitting side insertion holes and the two large pull side insertion holes, respectively , and is positioned on both sides of the reinforcing rib, so that the pin is positioned on the support portion of the large pull. It is characterized by being a thing.

Here, the large pull may be provided with a reinforcing portion extending along the support portion below the support portion, and a plurality of connecting plates for connecting the support portion and the reinforcing portion. Further, the joist may be a square pipe.

Further, in the connecting metal fitting of the present invention, the main body is composed of an upper metal fitting constituting the joist fitting surface and a lower metal fitting separate from the upper metal fitting.
The lower metal fitting has a downward U-shape when viewed in the extending direction of the large pull, and has a pair of large reference walls facing each other at intervals corresponding to the width of the large pull, and the pair of large references. It has a large pull fitting surface that is composed of a large pull placement surface that connects wall surfaces and is placed on the large pull.
The large loading surface is formed with two metal fitting-side insertion holes that penetrate in the vertical direction at intervals in the direction in which the pair of large cited wall surfaces face each other in the extending direction of the joist. You may.

If this aspect is adopted, the same member can be used for the upper metal fitting and the lower metal fitting only by changing the position of the metal fitting side insertion hole, and the number of member points can be suppressed. Further, in the connecting metal fitting of the present invention, the main body may be provided with a protrusion on the wall surface for joists.

According to the present invention, the installation work is facilitated, the versatility of the joists is improved , and even if the joists are applied to a sloping floor surface portion, the joists can be effectively prevented from slipping. It is possible to provide a connecting metal fitting.

It should be noted that even if the constituent requirements are included only in the description of each of the above-described embodiments and modifications, the constituent requirements may be applied to other embodiments and modifications.
The following will be added, including what has been explained so far.
(Appendix 1) The other connecting metal fittings are the connecting metal fittings that connect the joist and the joist extending in the direction orthogonal to the large pull, which constitutes the gantry provided at the site of civil engineering work.
A main body and a pin for positioning the main body in the large pull are provided.
The main body has an upward U-shape when viewed in the extending direction of the joist, and connects a pair of joist wall surfaces facing each other at intervals corresponding to the width of the joist and the pair of joist wall surfaces. It has a joist fitting surface composed of a joist support surface that supports the joist.
The joist support surface is formed with at least two metal fitting side insertion holes that penetrate in the vertical direction at intervals in the extending direction of the joist.
The pin is inserted into the metal fitting side insertion hole and the large pull side insertion hole formed in the large pull, so that the pin is positioned in the large pull.
(Appendix 2) In the connecting metal fitting of Appendix 1, the main body is a downward U-shape when viewed in the extending direction of the large pull, and a pair of facing each other at intervals corresponding to the width of the large pull. It may have a large pull fitting surface including a large reference wall surface and a large pull placement surface that connects the pair of large reference wall surfaces and is placed on the large pull.
(Appendix 3) In the connecting metal fitting according to the supplementary note 2, the main body comprises an upper metal fitting constituting the joist fitting surface and a lower metal fitting forming the large pull fitting surface, which is separate from the upper metal fitting. It may be.
(Appendix 4) In the connecting metal fittings described in Appendix 3, the large pull and the joist are made of square pipes having the same outer diameter size.
The upper metal fitting and the lower metal fitting may have the same structure except for the metal fitting side insertion hole.

Claims (4)

In the connecting metal fittings that connect the joist and the joist extending in the direction orthogonal to the large pull, which constitutes the gantry installed at the site of civil engineering work, etc.
A main body and a pin for positioning the main body in the large pull are provided.
The main body has an upward U-shape when viewed in the extending direction of the joist, and connects a pair of joist wall surfaces facing each other at intervals corresponding to the width of the joist and the pair of joist wall surfaces. It has a joist fitting surface composed of a joist support surface that supports the joist.
The joist support surface is formed with at least two metal fitting side insertion holes that penetrate in the vertical direction at intervals in the extending direction of the joist.
A connecting metal fitting characterized in that the pin is positioned in the large pull by being inserted into the metal fitting side insertion hole and the large pull side insertion hole formed in the large pull. The main body has a downward U-shape when viewed in the extending direction of the large pull, and a pair of large cited wall surfaces facing each other at intervals corresponding to the width of the large pull, and the pair of large cited wall surfaces. It has a large pulling fitting surface composed of a large pulling mounting surface to be mounted on the large pulling surface.
The connecting metal fitting according to claim 1, wherein the metal fitting side insertion hole penetrates from the joist support surface to the large loading surface. 2. The main body is characterized in that it is composed of an upper metal fitting constituting the joist fitting surface and a lower metal fitting forming the large pull fitting surface and separate from the upper metal fitting. Described connecting metal fittings. The large pull and the joist consist of square pipes with the same outer diameter size.
The connecting metal fitting according to claim 3, wherein the upper metal fitting and the lower metal fitting have the same structure except for the metal fitting side insertion hole.

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