JP6832012B2 - Clamp fittings and manufacturing method of clamp fittings - Google Patents

Description

The present invention relates to a clamp metal fitting and a method for manufacturing a clamp metal fitting used for assembling an assembly scaffold at a construction site or the like.

Generally, at construction sites, various members such as corbels, cloth frames with floors, soundproof panels, and treads of stairs are attached to pipe materials (support pipes), and intersections of pipe materials that support scaffolding boards are used. Clamp fittings are used when joining.
For example, in Patent Document 1, a fixing object is attached to the center of the outer side, and a fixing receiving member having a semicircular concave portion inside and an arcuate concave portion having the same radius as the semicircular concave portion are provided and fixed inside. The base is rotatably connected to one of the receiving members, and the movable receiving member is provided with a nut receiving seat having a notch groove at the tip, and the base is rotatably connected to the other of the fixed receiving members. A clamp metal fitting having a male screw rod connected to and fitted into a notch groove of a movable receiving member and a tightening nut screwed onto the male screw rod is described.
When connecting the intersections of the vertical pipe and the horizontal pipe that support the scaffolding plate with this clamp metal fitting, for example, the two clamp metal fittings are inverted 90 degrees, and the respective fixing receiving members are connected to each other. It is used by forming a binding bracket.

Japanese Unexamined Patent Publication No. 8-209925

However, in the clamp metal fitting of Patent Document 1, in order to rotatably connect the base of the male screw rod to the other side of the fixed receiving member, a mounting hole is formed in the fixed receiving member, and the base of the male screw rod is provided with a mounting hole. There is a problem that a protruding pin to be attached to the shaft must be provided, the number of parts is large, and assembly is troublesome. In addition, a tightening nut that is screwed to a male screw rod is required, and the nut may fall and be lost during assembly work of a scaffold or the like, resulting in poor workability.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a clamp metal fitting and a method for manufacturing a clamp metal fitting, which has a small number of parts, does not require time and effort for assembly, and has excellent workability.

The clamp metal fitting according to the first invention according to the above object has a fixed receiving member having a first arc-shaped recess on the inside and a female screw portion at the tip, and a second arc-shaped recess on the inside. A movable receiving member having one end side rotatably connected to the base portion of the fixed receiving member and provided with a bolt insertion portion on the other end side, and a movable receiving member inserted into the bolt insertion portion from the outside of the movable receiving member during use. With a tightening bolt that is screwed onto the female screw portion
The female screw portion is composed of a pair of half-split female screw portions provided so as to face the tip portion of the fixed receiving member.

In the clamp metal fitting according to the first invention, the fixing receiving member includes a flat seat, a pair of left and right side plate portions standing on both sides of the flat seat and forming the first arcuate recess, and each of the side plates. It is preferable that the portion has a semi-cylindrical projection portion extending from the portion and facing the portion, and the half-split female screw portion is formed on the inner peripheral surface of each protrusion portion.

In the clamp metal fitting according to the first invention, an engaging portion that engages with the outside of each of the protruding portions when the tightening bolt is screwed onto the female screw portion is provided on the other end side of the movable receiving member. It is preferable to be

The method for manufacturing a clamp fitting according to the second invention according to the above object is the method for manufacturing a clamp fitting according to the first invention.
After pressing one plate material to form the pair of half-split female screw portions, the plate material is bent so that the pair of half-split female screw portions face each other to form the female screw portion.

The method for manufacturing the clamp fitting according to the third invention according to the above object is the method for manufacturing the clamp fitting according to the first invention.
After forming a pair of semi-cylindrical protrusions facing each other on the tip of the fixing receiving member, the inner peripheral surfaces of the pair of protrusions are simultaneously processed by tapping from the pair of half-split female screw portions. The female screw portion is formed.

The clamp metal fitting according to the first invention has a fixed receiving member having a first arc-shaped recess on the inside and a female screw portion at the tip, and a second arc-shaped recess on the inside at one end. A movable receiving member whose side is rotatably connected to the base of the fixed receiving member and has a bolt insertion portion on the other end side, and a movable receiving member which is inserted into the bolt insertion portion from the outside of the movable receiving member during use and screwed into the female screw portion. Since the tightening bolt to be attached is provided, the tightening bolt is screwed into the female screw portion after sandwiching the pipe material between the first arcuate recess of the fixed receiving member and the second arcuate recess of the movable receiving member. The pipe material can be held easily and firmly just by wearing and tightening, and it has excellent workability. Further, since the female screw portion is composed of a pair of half-split female screw portions provided facing the tip of the fixing receiving member, it is not necessary to separately prepare female screw parts such as nuts, and the number of parts is small. As a result, the labor of assembly can be reduced.
The fixed receiving member is a flat seat, a pair of left and right side plate portions that are erected on both sides of the flat seat to form a first arcuate recess, and semi-cylindrical protrusions that extend to each side plate portion and face each other. has the door, since the half female screw portion on the inner peripheral surface of the protrusions are formed, and a female threaded portion is integral with the fixed receiving member, there is no possibility of losing as nuts, construction Excellent in sex.
An engaging portion that engages with the outside of each protrusion when the tightening bolt is screwed to the female screw portion is provided on the other end side of the movable receiving member, so that the tightening bolt is screwed to the female screw portion. After that, the half-split female screw portion does not open outward, the movable receiving member can be firmly fixed, and the holding stability of the pipe material is excellent.
In the method for manufacturing a clamp metal fitting according to the second invention, one plate material is pressed to form a pair of half-split female screw portions, and then the plate material is bent so that the pair of half-split female screw portions face each other. Since the female screw portion is formed, it is possible to inexpensively manufacture a fixed receiving member in which the female screw portion is integrated from one plate material without using a mold, and the mass productivity is excellent.
In the method for manufacturing a clamp metal fitting according to a third invention, a pair of semi-cylindrical protrusions facing each other are formed on the tip of a fixing receiving member, and then the inner peripheral surfaces of the pair of protrusions are simultaneously processed by tapping. Since a female screw portion consisting of a pair of half-split female screw portions is formed, the phases of the pair of half-split female screw portions can be reliably matched, and the shape of the female screw portion is excellent in accuracy and stability. The yield can be improved.

It is a side view of the use state of the clamp metal fitting which concerns on one Embodiment of this invention. (A) is a front view of the clamp metal fitting in a used state, and (B) is a front view of the clamp metal fitting with the movable receiving member opened. (A) is a plan view of the clamp metal fitting in a used state, and (B) is a plan view of the clamp metal fitting in an open state. It is an end view of the line AA of FIG. It is a plane development view of the fixed receiving member used in the manufacturing method of the clamp metal fitting which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the manufacturing method of the clamp metal fitting which concerns on 2nd Embodiment of this invention.

Subsequently, an embodiment embodying the present invention will be described with reference to the attached drawings, and the present invention will be understood.
Hereinafter, the clamp metal fitting 10 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIGS. 1, 2 (A), 2 (B), 3 (A), (B), and 4, the clamp metal fitting 10 is used for assembling an assembly scaffold at a construction site or the like and is fixed. By opening and closing the movable receiving member 12 with respect to the receiving member 11, the pipe material 13 is detachably held.
The fixed receiving member 11 is made of a single plate member 37 (for example, steel material such as ordinary steel, carbon steel, high-strength steel, etc., see FIG. 5), and is formed on both sides of the rectangular flat seat 15 and the flat seat 15. It has a pair of left and right side plate portions 16 and 17 that are erected. By providing the arc-shaped notches 18 and 19 on the side plate portions 16 and 17, the first arc-shaped recess 20 is formed inside the fixed receiving member 11. Further, semi-cylindrical protrusions 21 and 22 are extended so as to face each other on the upper end side of each side plate portion 16 and 17. Half-split female screw portions 23 and 24 are formed on the inner peripheral surfaces of the respective protrusions 21 and 22, and the pair of half-split female screw portions 23 and 24 facing each other form a half-split female screw portion 23 and 24 on the tip of the fixed receiving member 11. The female screw portion 25 is formed.

Further, the movable receiving member 12 has a second arcuate concave portion 27 inside, one end side is rotatably connected to the base portion 28 of the fixed receiving member 12 by a pin 30, and a bolt insertion portion 31 is provided on the other end side. It is provided. At the time of use, the tightening bolt 32 is inserted into the bolt insertion portion 31 from the outside of the movable receiving member 12 and screwed into the female screw portion 25 to form a first and second arc shape as shown in FIGS. The outer periphery of the pipe material 13 can be sandwiched between the recesses 20 and 27. When the tightening bolt 32 is screwed to the female screw portion 25 on the other end side of the movable receiving member 12, the half-split female screw portions 23, 24 engage with the outside of the protrusions 21 and 22 formed. An engaging portion 33 is provided. Since the protrusions 21 and 22 can be pressed from both outer sides by the engaging portion 33, the half-split female screw portions 23 and 24 do not open outward during use, and the movable receiving member 12 is firmly fixed. Therefore, the pipe material 13 can be stably held. It is sufficient that the engaging portion 33 engages with the outside of the protrusions 21 and 22 to prevent the half-split female screw portions 23 and 24 from opening outward, and the structure thereof can be appropriately selected. In particular, as shown in FIG. 4, when a pair of inclined portions 34, 35 which are widened toward the front side (opening side) and whose base side engages with the front side of the protrusions 21, 22 are provided, a tightening bolt. As the 32 is tightened, the outer sides of the protrusions 21 and 22 are pressed from both sides by the inclined portions 34 and 35, and the tightening bolt 13 and the female screw portion 25 are firmly fastened to secure the fixed receiving member 11 and the movable receiving member 12. Is fixed to.

Next, a method of manufacturing the clamp metal fitting according to the first embodiment of the present invention will be described.
First, as shown in FIG. 5, one plate member 37 in which the shape of the fixed receiving member 11 is developed in a plane is prepared. Support holes 38, 39 for inserting a pin 30 that rotatably supports one end side of the movable receiving member 12 are provided in the lower portions on both sides of the plate member 37 serving as the base 28 of the fixed receiving member 11. Then, projecting pieces 40, 41 serving as protrusions 21, 22 of the fixing receiving member 11 are provided at the upper ends on both sides of the plate member 37. The projecting pieces 40 and 41 are press-processed to form a pair of half-split female screw portions 23 and 24. After that, the side plate portions 16 and 17 are bent so that the pair of half-split female screw portions 23 and 24 face each other to form the female screw portion 25 as shown in FIG. At this time, a male screw member (for example, a male screw member) screwed with the half-split female screw portions 23, 24 in order to match (continue) the peaks (and valleys) of the pair of half-split female screw portions 23, 24. , It is preferable to bend the side plate portions 16 and 17 so as to sandwich the tightening bolt 32) in between to form the shape of the fixed receiving member 11. If necessary, the space between the pair of protrusions 21 and 22 (outer peripheral portion) is spot-welded, or an annular member is fitted to the outer periphery of the protrusions 21 and 22, and the half-split female screw portion 23 is formed. , 24 may be prevented from opening, and in that case, the engaging portion 33 of the movable receiving member 12 may be omitted.

The movable receiving member 12 can be molded by using a mold as in the conventional case. As shown in FIG. 3B, pin insertion holes 43 and 44 are provided on both sides of the movable receiving member 12 in the width direction on one end side. By inserting and fixing the pin 30 in a state where the support holes 38 and 39 of the fixed receiving member 11 and the pin insertion holes 43 and 44 of the movable receiving member 12 are overlapped with each other, one end side of the movable receiving member 12 becomes the fixed receiving member 11. It is rotatably connected to the base 28 to complete the clamp fitting 10.
It is sufficient that one end side of the movable receiving member 12 is rotatably connected to the base portion 28 of the fixed receiving member 11, and the structure thereof can be appropriately selected. For example, if support protrusions rotatably supported in the support holes 38 and 39 of the fixed receiving member 11 are provided on both sides in the width direction on one end side of the movable receiving member, the movable receiving member can be connected without using a pin.

Subsequently, a method of manufacturing the clamp metal fitting according to the second embodiment of the present invention will be described.
First, the plate material 37 shown in FIG. 5 is prepared in the same manner as in the first embodiment. Then, the protrusions 40 and 41 on both sides are curved to form the semi-cylindrical protrusions 21 and 22, and the side plate portions 16 and 17 are bent so as to face each other to form the fixed receiving member 11. .. After that, as shown in FIG. 6, the inner peripheral surfaces of the pair of protrusions 21 and 22 formed on the tip of the fixed receiving member 11 are simultaneously processed by the tap 46, and the pair of halves as shown in FIG. A female screw portion 25 composed of split female screw portions 23 and 24 is formed. At this time, it is preferable to fix the protrusions 21 and 22 by, for example, fitting an annular member 47 on the outer circumference so that the protrusions 21 and 22 do not open outward. The processing by the tap 46 may be performed manually or electrically.
Since the manufacturing method and the assembling method of the other movable receiving member 12 are the same as those in the first embodiment, the description thereof will be omitted. In this way, the clamp metal fittings 10 shown in FIGS. 1 to 4 are completed.

Although the embodiment of the present invention has been described above, the present invention is not limited to the configuration described in the above-described embodiment, and can be considered within the scope of the matters described in the claims. Other embodiments and modifications are also included.
For example, in the first embodiment, a pair of half-split female screw portions are formed by press working in the state of a plate material, but when a sufficient screw groove cannot be formed only by press working, a pair of half-split female screw portions are formed. After the side plate portion is bent so that the female screw portion (protrusion portion) faces each other to form the shape of the fixing receiving member, the inner peripheral surface of the protrusion may be additionally processed by tapping to complete the female screw portion. ..
The shape of the side plate portion connecting the flat seat and the female screw portion (projection portion) when viewed in a plan view can be appropriately selected. Instead of bending in the middle as in the above embodiment, for example, it may be formed in a straight line or in a curved curved shape such as an arc.
Further, in the above embodiment, a round hole is provided on the other end side of the movable receiving member as the bolt insertion portion, but a notch groove may be provided instead of the round hole.
The clamp metal fitting of the present invention can be used for various purposes by connecting two or more clamp metal fittings or attaching other metal fittings or parts, in addition to being used alone as a single clamp. At this time, a through hole can be provided in the flat seat of the fixed receiving member as needed, and the clamp metal fittings can be easily connected to each other or other metal fittings or parts can be attached by using the through hole. Can be done.

10: Clamp fitting, 11: Fixed receiving member, 12: Movable receiving member, 13: Pipe material, 15: Flat seat, 16, 17: Side plate, 18, 19: Notch, 20: First arcuate recess, 21, 22: Protrusion, 23, 24: Half-split female screw, 25: Female screw, 27: Second arcuate recess, 28: Base, 30: Pin, 31: Bolt insertion part, 32: Tightening bolt , 33: Engagement part, 34, 35: Inclined part, 37: Plate material, 38, 39: Support hole, 40, 41: Projection piece, 43, 44: Pin insertion hole, 46: Tap, 47: Circular member

Claims (4)

A fixed receiving member having a first arc-shaped recess on the inside and a female screw portion at the tip, and a second arc-shaped recess on the inside, one end rotating around the base of the fixed receiving member. A movable receiving member that is freely connected and has a bolt insertion portion on the other end side, and a tightening bolt that is inserted into the bolt insertion portion from the outside of the movable receiving member and screwed to the female screw portion during use. With
The female screw portion is Ri Do from a pair of half a female screw portion provided opposite to the previous portion of the fixed receiving member,
The fixed receiving member is a flat seat, a pair of left and right side plate portions standing on both sides of the flat seat and forming the first arcuate recess, and a semi-cylinder extending and facing each side plate portion. It has a shape-like protrusion, and the half-split female screw portion is formed on the inner peripheral surface of each protrusion.
A clamp metal fitting provided on the other end side of the movable receiving member with an engaging portion that engages with the outside of each of the protrusions when the tightening bolt is screwed onto the female screw portion. A fixed receiving member having a first arc-shaped recess on the inside and a female screw portion at the tip, and a second arc-shaped recess on the inside, one end rotating around the base of the fixed receiving member. A movable receiving member that is freely connected and has a bolt insertion portion on the other end side, and a tightening bolt that is inserted into the bolt insertion portion from the outside of the movable receiving member and screwed to the female screw portion during use. With
The female screw portion is composed of a pair of half-split female screw portions provided so as to face the tip portion of the fixed receiving member.
The fixed receiving member is a flat seat, a pair of left and right side plate portions standing on both sides of the flat seat and forming the first arcuate recess, and a semi-cylinder extending and facing each side plate portion. It has a shape-like protrusion, and the half-split female screw portion is formed on the inner peripheral surface of each protrusion.
A method for manufacturing a clamp metal fitting in which an engaging portion that engages with the outside of each of the protrusions when the tightening bolt is screwed onto the female screw portion is provided on the other end side of the movable receiving member. ,
After pressing one plate material to form the pair of half-split female screw portions, the plate material is bent so that the pair of half-split female screw portions face each other to form the female screw portion. Manufacturing method of clamp metal fittings. A fixed receiving member having a first arc-shaped recess on the inside and a female screw portion at the tip, and a second arc-shaped recess on the inside, one end rotating around the base of the fixed receiving member. A movable receiving member that is freely connected and has a bolt insertion portion on the other end side, and a tightening bolt that is inserted into the bolt insertion portion from the outside of the movable receiving member and screwed to the female screw portion during use. With
The female screw portion is composed of a pair of half-split female screw portions provided so as to face the tip portion of the fixed receiving member, and the fixed receiving member is erected on both sides of the flat seat and the flat seat. It has a pair of left and right side plate portions on which a first arc-shaped recess is formed, and a semi-cylindrical protrusion portion extending from each side plate portion and facing each other, and the half on the inner peripheral surface of each protrusion portion. It is a method of manufacturing a clamp metal fitting on which a split female screw portion is formed.
After forming a pair of semi-cylindrical protrusions facing each other on the tip of the fixing receiving member, the inner peripheral surfaces of the pair of protrusions are simultaneously processed by tapping from the pair of half-split female screw portions. A method for manufacturing a clamp metal fitting, which comprises forming the female screw portion. A fixed receiving member having a first arc-shaped recess on the inside and a female screw portion at the tip, and a second arc-shaped recess on the inside, one end rotating around the base of the fixed receiving member. A movable receiving member that is freely connected and has a bolt insertion portion on the other end side, and a tightening bolt that is inserted into the bolt insertion portion from the outside of the movable receiving member and screwed to the female screw portion during use. With
The female screw portion is composed of a pair of half-split female screw portions provided so as to face the tip portion of the fixed receiving member.
The fixed receiving member is a flat seat, a pair of left and right side plate portions standing on both sides of the flat seat and forming the first arcuate recess, and a semi-cylinder extending and facing each side plate portion. It has a shape-like protrusion, and the half-split female screw portion is formed on the inner peripheral surface of each protrusion.
A method for manufacturing a clamp metal fitting in which an engaging portion that engages with the outside of each of the protrusions when the tightening bolt is screwed onto the female screw portion is provided on the other end side of the movable receiving member. ,
After forming a pair of semi-cylindrical protrusions facing each other on the tip of the fixing receiving member, the inner peripheral surfaces of the pair of protrusions are simultaneously processed by tapping from the pair of half-split female screw portions. A method for manufacturing a clamp metal fitting, which comprises forming the female screw portion.

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