JP2019066022A - Clamp fitting and method for manufacturing clamp fitting - Google Patents

Abstract

To provide a clamp fitting having a small number of components, being assembled easily, and excellent in workability, and a method for manufacturing the clamp fitting.SOLUTION: A clamp fitting comprises: a stationary receiving member 11 having a first arc-shaped concave part 20 therein, and provided with a female screw part 25 at its tip part; a movable receiving member 12 having a second arc-shaped concave part 27, and of which one end side is rotatably connected to a base part 28 of the stationary receiving member 11, and the other end side is provided with a bolt insertion part 31; and a fastening bolt 32 inserted into the bolt insertion part 31 from the outside of the movable receiving member 12 in use, and screwed into the female screw part 25. The female screw part 25 is composed of a pair of half-split female screw parts 23, 24 provided oppositely at the tip part of the stationary receiving member 11.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a clamp and a method of manufacturing a clamp that is used for assembly of an assembly scaffold, etc. in a construction site or the like.

In general, in the construction site etc., when attaching various members such as a carrying frame, a cloth frame with floor, a soundproof panel, a step board of stairs, etc. to a pipe material (supporting pipe) Clamps are used when joining, etc.
For example, in Patent Document 1, an object to be fixed is attached at the center of the outer side, and a fixed receiving member whose inner side is a semicircular concave portion and an arc shaped concave portion having the same radius as the semicircular concave portion are fixed The base is pivotably connected to one of the receiving members, and the base is pivotable to the other of the fixed receiving member and the movable receiving member provided with a nut receiving seat having a notch groove at the tip thereof A clamp fitting is described which has an externally threaded rod connected to and engaged with the notch groove of the movable receiving member and a clamping nut screwed onto the externally threaded rod.
For example, in the case of connecting the crossing portion of the vertical pipe and the horizontal pipe supporting the scaffold plate with this clamp bracket, the respective fixed receiving members are connected with the two clamp brackets turned 90 degrees, Form a fastener and use it.

JP-A-8-209925

However, in order to pivotally connect the base of the male screw rod to the other of the fixed receiving members, the clamp bracket of Patent Document 1 forms a mounting hole in the fixed receiving member and mounts the mounting hole in the base of the male screw rod. There is a problem that it is necessary to provide a protruding pin to be pivotally mounted, the number of parts is large, and the assembly takes time and effort. In addition, a tightening nut is required to be screwed to the male screw rod, and there is a risk that the nut may fall and be lost during an assembly operation such as a scaffold, and there is also a problem that the workability is lacking.
The present invention has been made in view of such circumstances, and an object thereof is to provide a clamp fitting and a clamp fitting manufacturing method having a small number of parts, requiring little time for assembly, and being excellent in workability.

The clamp according to the first aspect of the invention has the first arcuate recess at the inner side, and the fixed receiving member provided with the female screw portion at the tip, and the second arcuate recess at the inner side. A movable receiving member having one end side rotatably connected to the base of the fixed receiving member and a bolt inserting portion provided at the other end, and inserted into the bolt inserting portion from the outside of the movable receiving member at the time of use And a tightening bolt screwed to the female screw portion,
The female screw portion includes a pair of half-divided female screw portions provided opposite to the tip of the fixed receiving member.

In the clamp according to the first aspect of the present invention, the fixed receiving member includes a flat seat, a pair of left and right side plates which are provided on both sides of the flat seat and in which the first arcuate recess is formed, and the respective side plates It is preferable to have a semi-cylindrical protrusion extending in the opposite direction, and the half split female screw portion is formed on the inner circumferential surface of each of the protrusions.

In the clamp according to the first aspect of the present invention, the other end side of the movable receiving member is provided with an engaging portion that engages with the outside of each of the protrusions when the tightening bolt is screwed to the female screw portion. Being preferred.

A method of manufacturing a clamp fitting according to a second invention in accordance with the object is a method of manufacturing a clamp fitting according to the first invention,
After forming one pair of plate members by press working to form the pair of half split female screw portions, the plate member is bent to form the pair of half split female thread portions so as to face each other.

A method of manufacturing a clamp according to a third aspect of the present invention in accordance with the object is a method of manufacturing a clamp according to the first aspect,
After forming a pair of opposing semi-cylindrical projections at the tip of the fixed receiving member, the inner peripheral surfaces of the pair of projections are simultaneously machined with a tap, and from the pair of half split female threads Forming the female screw portion.

The clamp according to the first aspect of the present invention has a first circular arc-shaped recess inside, and a fixed receiving member provided with a female screw portion at the tip and a second circular arc-shaped recess inside, and one end The movable receiving member is rotatably connected to the base of the fixed receiving member and has a bolt insertion portion on the other end, and is inserted into the bolt insertion portion from the outside of the movable receiving member at the time of use, and screwed into the female screw Since the fastening bolt to be attached is provided, the pipe material is held between the first arc-shaped recess of the fixed receiving member and the second arc-shaped recess of the movable receiving member, and then the fastening bolt is screwed into the female screw. The pipe material can be held easily and firmly simply by wearing and tightening, and the workability is excellent. In addition, since the female screw portion is composed of a pair of half-divided female screw portions provided opposite to the tip portion of the fixed receiving member, it is not necessary to separately prepare a female screw component such as a nut, and the number of components is small. Can reduce the time and effort for assembly.
A pair of left and right side plate portions where the fixed receiving members are erected on both sides of the plane seat and the plane seat and the first arc-shaped concave portion is formed, and a semi-cylindrical projection portion extended and opposed to each side plate portion And the female screw portion is integrated with the fixing receiving member when there is a half-divided female screw portion formed on the inner peripheral surface of each protrusion, and there is no risk of losing as in the case of a nut. Excellent in quality.
When an engaging portion is provided on the other end side of the movable receiving member to engage with the outside of each protrusion when the tightening bolt is screwed to the female screw portion, the tightening bolt is screwed to the female screw portion Thereafter, the movable receiving member can be firmly fixed without the half screw part being opened outward, and the holding stability of the pipe material is excellent.
In the method of manufacturing a clamp according to the second aspect of the present invention, after a single plate member is pressed to form a pair of half split female screw portions, the plate member 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 a single plate material without using a mold, and mass productivity is excellent.
In the method of manufacturing a clamp according to the third aspect of the present invention, after forming a pair of opposing semi-cylindrical protrusions at the tip of the fixing receiving member, the inner circumferential surfaces of the pair of protrusions are simultaneously processed with a tap Since the female screw part consisting of a pair of half-divided female screw parts is formed, the phases of the pair of half-divided female screw parts can be reliably made to coincide, and the shape of the female screw part is excellent in accuracy and stability. The yield can be improved.

It is a side view of use condition of a clamp metal fitting concerning one embodiment of the present invention. (A) is a front view of the use condition of the clamp metal fitting, (B) is a front view of the state which opened the movable receiving member of the clamp metal fitting. (A) is a top view of the use condition of the clamp metal fitting, (B) is a top view of the state which opened the movable receiving member of the clamp metal fitting. It is an AA line end elevation of FIG. It is a plane expanded view of a fixed receiving member used for a manufacturing method of a clamp metal fitting concerning a 1st embodiment of the present invention. It is explanatory drawing which shows the manufacturing method of the clamp metal fitting which concerns on the 2nd Embodiment of this invention.

Next, embodiments of the present invention will be described with reference to the attached drawings for understanding of the present invention.
Hereinafter, a clamp 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIG. 1, FIG. 2 (A), (B), FIG. 3 (A), (B) and FIG. 4, the clamp fitting 10 is used for the assembly etc. of an assembly scaffolding etc. The pipe member 13 is detachably held by opening and closing the movable receiving member 12 with respect to the receiving member 11.
The fixed receiving member 11 is made of a single plate member 37 (for example, steel such as ordinary steel, carbon steel, high tensile steel, etc., see FIG. 5), and has rectangular planar seat 15 and both sides of planar seat 15 It has a pair of left and right side plate portions 16 and 17 which are erected. By providing the arc-shaped notches 18 and 19 in the side plate portions 16 and 17, a first arc-shaped recess 20 is formed inside the fixed receiving member 11. In addition, semi-cylindrical protrusions 21 and 22 are extended on the upper end side of the side plate portions 16 and 17 so as to face each other. Further, half screw threads 23 and 24 are formed on the inner peripheral surface of each of the protrusions 21 and 22, and a pair of half screw threads 23 and 24 facing each other is used on the end of the fixed receiving member 11. A female screw 25 is formed.

Further, the movable receiving member 12 has a second arc-shaped recess 27 inside, one end thereof is rotatably connected to the base 28 of the fixed receiving member 12 by the pin 30 and the bolt insertion portion 31 is provided on the other end. It is provided. By inserting the fastening bolt 32 into the bolt insertion portion 31 from the outside of the movable receiving member 12 at the time of use and screwing it to the female screw portion 25, as shown in FIG. 1 to FIG. The outer periphery of the pipe material 13 can be held by the recessed portions 20 and 27. When the tightening bolt 32 is screwed to the female screw 25 on the other end side of the movable receiving member 12, it engages with the outside of the projection 21 or 22 on which the female screw 23 or 24 is formed. An engaging portion 33 is provided. Since the protrusions 21 and 22 can be pressed from both sides by the engaging portion 33, the movable female members 23 and 24 do not open outward during use, and the movable receiving member 12 is firmly fixed. Thus, the pipe material 13 can be stably held. In addition, the engaging part 33 should just be engaged with the outer side of the projection parts 21 and 22, and it can prevent that the half screw parts 23 and 24 open outward, The structure can be selected suitably. In particular, as shown in FIG. 4, in the case of providing a pair of inclined portions 34 and 35 which are expanded toward the front side (opening side) and the base side engages with the front side of the protrusions 21 and 22, tightening bolts As the clamps 32 are tightened, the outer sides of the projections 21 and 22 are pressed from both sides by the inclined portions 34 and 35, and the tightening bolt 13 and the female screw 25 are firmly tightened to secure the fixed receiving member 11 and the movable receiving member 12 It is fixed to

Next, a method of manufacturing the clamp 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 expanded in a plane is prepared. Support holes 38 and 39 for inserting a pin 30 rotatably supporting one end side of the movable receiving member 12 are provided in lower portions on both sides of the plate member 37 which becomes the base 28 of the fixed receiving member 11. Further, at upper end portions on both sides of the plate member 37, projecting pieces 40 and 41 to be the projecting portions 21 and 22 of the fixed receiving member 11 are provided. The projecting pieces 40 and 41 are subjected to press processing to form a pair of half split female thread portions 23 and 24. Thereafter, the side plate portions 16 and 17 are bent so that the pair of half split female thread portions 23 and 24 face each other to form the female thread portion 25 as shown in FIG. 1. At this time, a male screw member (e.g., a male screw member) screwed with the half female threads 23 and 24 in order to make the peaks (and the valleys) of the pair of half female threads 23 and 24 coincide with each other (and make them continuous). Preferably, the side plate portions 16 and 17 are bent so as to sandwich the fastening bolt 32), and the shape of the fixed receiving member 11 is formed. If necessary, the half screw thread 23 may be spot-welded between the pair of protrusions 21 and 22 (peripheral portion) or the ring member may be fitted on the outer periphery of the protrusions 21 and 22. , 24 may be prevented, and in this case, the engaging portion 33 of the movable receiving member 12 may be omitted.

The movable receiving member 12 can be molded using a mold as in the prior art. As shown in FIG. 3B, pin insertion holes 43 and 44 are provided on both sides in the width direction of one end side of the movable receiving member 12. By inserting and fixing the pin 30 in a state in which 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 overlap, one end side of the movable receiving member 12 is of the fixed receiving member 11 It is pivotally connected to the base 28 and the clamp 10 is completed.
In addition, one end side of the movable receiving member 12 may be rotatably connected to the base 28 of the fixed receiving member 11, and the structure can be appropriately selected. For example, by providing support protrusions rotatably supported by the support holes 38 and 39 of the fixed receiving member 11 on both sides in the width direction of one end side of the movable receiving member, it is possible to connect without using a pin.

Then, the manufacturing method of the clamp metal fitting which concerns on the 2nd Embodiment of this invention is demonstrated.
First, similarly to the first embodiment, the plate 37 shown in FIG. 5 is prepared. Then, the protruding pieces 40 and 41 on both sides are curved to form semicylindrical protrusions 21 and 22, and the side plate portions 16 and 17 are bent so as to face each other and molded into the shape of the fixed receiving member 11. . Thereafter, as shown in FIG. 6, the inner peripheral surfaces of the pair of protrusions 21 and 22 formed at the tip of the fixed receiving member 11 are simultaneously processed by the tap 46, and 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 the annular member 47 on the outer periphery so that the protrusions 21 and 22 do not open outward. The processing by the tap 46 may be performed manually or electrically.
The other manufacturing method and assembling method of the movable receiving member 12 are the same as those of the first embodiment, so the description will be omitted. Thus, the clamp 10 shown in FIGS. 1 to 4 is completed.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the structure as described in the above-mentioned embodiment in any way, It is considered within the range described in the claim. Other embodiments and modifications are also included.
For example, in the first embodiment, pressing is performed in the state of a plate material to form a pair of half-divided female screw portions, but when sufficient screw grooves can not be formed only by pressing, a pair of half-divided female threads are formed. After the side plate portion is bent so that the female screw portion (projection portion) faces and the shape of the fixing receiving member is formed, the inner peripheral surface of the protrusion portion may be additionally processed by tapping to complete the female screw portion .
In addition, the shape when planarly viewing the side plate part which connects between a plane seat and a female screw part (protrusion part) can be selected suitably. As in the above embodiment, instead of being bent in the middle, for example, it may be formed in a linear shape, or may be formed in a curved curved shape such as an arc.
Moreover, in the said embodiment, although the round hole was provided in the other end side of the movable receiving member as a volt | bolt insertion part, you may provide a notch groove instead of a round hole.
In addition, the clamp metal fitting of this invention can be used for various uses by connecting 2 or more clamp metal fittings other than using it as a single clamp separately, or attaching other metal fittings and components. At this time, if necessary, a through hole can be provided in the flat seat of the fixed receiving member, and the clamp metal fittings can be easily connected with one another by using the through hole, or other metal fittings and parts can be attached. You can

10: clamp bracket, 11: fixed receiving member, 12: movable receiving member, 13: pipe member, 15: flat seat, 16, 17: side plate portion, 18, 19: notch, 20: first arc-shaped recess, 21 and 22: projection part 23 and 24: half-divided female screw part 25: female screw part 27: second arc-shaped concave part 28: base part 30: pin 31: bolt insertion part 32: tightening bolt , 33: engaging portion, 34, 35: inclined portion, 37: plate material, 38, 39: support hole, 40, 41: projecting piece, 43, 44: pin insertion hole, 46: tap, 47: annular member

Claims (5)

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 of which is pivoted to the base of the fixed receiving member A movable receiving member which is freely coupled and has a bolt insertion portion on the other end side, and a tightening bolt which is inserted into the bolt insertion portion from the outside of the movable receiving member at the time of use and screwed to the female screw portion Equipped with
The clamp fitting according to claim 1, wherein the female screw portion comprises a pair of half-divided female screw portions provided opposite to the tip portion of the fixed receiving member. The clamp fitting according to claim 1, wherein the fixed receiving member is a flat seat, and a pair of left and right side plate portions erected on both sides of the flat seat and in which the first arc-shaped concave portion is formed, and the respective side plate portions A clamp having a semi-cylindrical protruding portion extending in the opposite direction and the half-divided female screw portion being formed on the inner peripheral surface of each of the protruding portions. The clamp according to claim 2, wherein the other end of the movable receiving member is provided with an engaging portion which engages with the outside of each of the protrusions when the tightening bolt is screwed to the female screw portion. Clamps characterized by It is a manufacturing method of the clamp metal fitting according to any one of claims 1 to 3.
After forming one pair of plate members by press working to form the pair of half split female screw portions, the plate member is bent so that the pair of half split female thread portions are opposed to form the female thread portion. Method of manufacturing clamps to be used. It is a manufacturing method of the clamp metal fitting of Claim 2 or 3, Comprising:
After forming a pair of opposing semi-cylindrical projections at the tip of the fixed receiving member, the inner peripheral surfaces of the pair of projections are simultaneously machined with a tap, and from the pair of half split female threads A method of manufacturing a clamp fitting, comprising: forming the female screw portion.

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