JP3195908U - Clamp metal fitting device - Google Patents

Abstract

A clamp fitting device that does not use extra material, has sufficient strength, and is easy to assemble is provided. SOLUTION: First and second clamping mechanisms 13 and 14 for sandwiching support pipes 15 and 23 are interposed via first and second flat seats 11 and 12 formed on respective fixed receiving members 17 and 24, respectively. The clamp projection device 10 is connected back to back, and tubular projections 28 and 29 are arranged at diagonally diagonal positions of virtual squares formed at the centers of the first and second plane seats 11 and 12, respectively. Caulking holes 30 and 31 for close fitting are provided, and hooking protrusions 32 and 33 and hooking portions 34 and 35 for close fitting are provided at other diagonal positions of the virtual square, respectively, and first and second clamps The mechanisms 13 and 14 were connected using the tubular projections 28 and 29 and the caulking holes 30 and 31, and the latching projections 32 and 33 and the latching portions 34 and 35. [Selection] Figure 1

Description

  The present invention relates to a clamp fitting device that is used in a construction site or the like to connect crossing parts such as pipe struts that support a scaffold plate or to connect two pipe members together.

In general, an assembly scaffold used in a construction site or the like is assembled by vertically and horizontally connecting pipe materials constituting columns, beams, and the like with a clamp fitting device (see, for example, Patent Document 1).
As shown in FIG. 8, the conventional clamp fitting device 70 includes first and second clamp mechanisms 73 and 74 that sandwich the pipes 71 and 72, respectively, and the first and second clamp mechanisms 73 and 74. Are connected by four rivets 77 (normally the diameter D is 6 mm) with the respective plane seats 75 and 76 back to back.

The first clamp mechanism 73 (the same applies to the second clamp mechanism 74) includes a fixed receiving member 79 having a semicircular arc-shaped recess 78 into which the pipe 71 is fitted, and a pin 80 at the base of the fixed receiving member 79. And a movable receiving member 82 having a semicircular arc-shaped recess 81 that is rotatably connected, and a bolt 83 and a nut 84 that connect the movable receiving member 82 and the fixed receiving member 79. The base of the bolt 83 is connected to the tip of the fixed receiving member 79 via a pin 85 so as to be rotatable.
Moreover, the upper part of FIG. 8 shows the rivet hole 86 formed in each plane seat 75,76.

JP 2004-27781 A

However, the conventional clamp fitting apparatus has the following problems.
When manufacturing the clamp fitting 70, it is necessary to insert the rivets 77 into the four rivet holes 86 provided in the flat seats 75 and 76 in addition to press molding the first and second clamp mechanisms 73 and 74. Extra material was needed.
Further, since a rivet 77 having a diameter D of 6 mm is normally used, the rivet 77 has a certain degree of strength against pulling, but has some play between the rivet 77 and the rivet hole 86 against shearing. In some cases, it is necessary to provide a (gap), and the shearing force is concentrated on one or two rivets 77, resulting in insufficient strength.
Of course, it is conceivable to increase the diameter of the rivet. However, in assembling, it is necessary to arrange the adjacent rivets with a gap in order to crush and crimp the head of the rivet. There was a problem that led to an increase in size.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a clamp fitting device that does not use extra material, has sufficient strength, and is easy to assemble.

A clamp fitting device according to the present invention that meets the above-described object is provided with a fixed receiving member having a first concave portion on the inner side that is aligned with an outer surface of a support pipe, and a first pivotable to a base end portion of the fixed receiving member. A nut receiving seat is formed at the tip, and a movable receiving member having a second recess inside that matches the outer surface of the support pipe, and a tip of the fixed receiving member A mounting bolt that is pivotally mounted via a second pin, a tip portion of which is mounted on the nut receiving seat, and the supporting pipe is fastened by the fixed receiving member and the movable receiving member by a screwed nut. In the clamp fitting device, wherein the first and second clamp mechanisms each including the above are connected back to back via the first and second flat seats formed on the respective fixed receiving members,
Tubular protrusions and caulking holes into which the tubular protrusions are closely fitted are provided at hypothetical (ie, fictitious) square diagonal diagonal positions a and c formed at the center of each of the first and second plane seats. , Provided at the other diagonal positions b and d of the virtual square formed at the center of the first and second plane seats, respectively, are provided with a latching projection and a latching portion into which the latching projection is closely fitted,
The first and second clamping mechanisms are coupled using the tubular projection and the caulking hole, and the latching projection and the latching portion.

Here, the support pipes supported by the first and second clamping mechanisms are orthogonal to each other, and the formation positions of the hooking protrusions and the hooking portions formed on the first and second plane seats are reversed. It is good to be.
The support pipes supported by the first and second clamp mechanisms are orthogonal to each other, and the formation positions of the tubular projections and the caulking holes formed on the first and second plane seats are reversed. Also good.

  In the clamp fitting device according to the present invention, it is preferable that a tapered portion having a truncated cone shape is formed on the exit side of the caulking hole into which the tubular protrusion is fitted.

In the clamp fitting device according to the present invention, the connection between the first clamp mechanism and the second clamp mechanism is a tubular protrusion formed on each of the first and second plane seats (for example, formed by pressing). Since it is carried out using the crimping hole, the latching protrusion and the latching portion, there is no need to use a rivet as in the prior art.
Therefore, it is possible to provide a clamp fitting device that does not use extra material, has sufficient strength, is inexpensive, and is easy to assemble.

It is a front view of the clamp metal fitting device concerning one embodiment of the present invention. It is a top view of the clamp metal fitting device. It is a perspective view which shows the state which connected the stationary receiving member of each clamp mechanism of the clamp metal fittings device. It is a perspective view which shows the state before the connection of the fixed receiving member of each said clamp mechanism. (A)-(D) are explanatory drawings of the attachment method of the 1st, 2nd plane seat of the clamp metal fittings device. It is a perspective view which shows the state which connected the stationary receiving member of each clamp mechanism of the clamp metal fitting apparatus which concerns on other embodiment of this invention. It is a perspective view which shows the state before the connection of the fixed receiving member of each said clamp mechanism. It is a front view of the clamp metal fitting device concerning a conventional example.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 5, a clamp fitting device 10 according to an embodiment of the present invention is made of a steel material (for example, ordinary steel, carbon steel, high-tensile steel), and each of the first and second components. The first and second clamping mechanisms 13 and 14 are connected back to back via the plane seats 11 and 12 (the first and second plane seats 11 and 12 face each other). Without using any material, it has sufficient strength, is inexpensive and easy to assemble. The second clamp mechanism 14 has substantially the same configuration as that of the first clamp mechanism 13 and will be described below in detail.

As shown in FIGS. 1 to 4, the first clamping mechanism 13 includes a fixed receiving member 17 having a first recess 16 on the inner side that is aligned with the outer surface of the support pipe 15, and a base of the fixed receiving member 17. A base end portion is connected to the end portion via a first pin 18 so as to be rotatable, and a nut receiving seat 20 having a U-shaped opening portion 19 is formed at the front end portion. And a movable receiving member 22 having a second recess 21 on the inside.
Further, the second clamp mechanism 14 also includes a fixed receiving member 24 having a first concave portion 16 on the inner side that is aligned with the outer surface of the support pipe 23, and the fixed receiving member 24 via the first pin 18. The movable receiving member 22 which has the 2nd recessed part 21 which an edge part is connected and corresponds to the outer surface of the support pipe 23 inside is provided.

As shown in FIGS. 1 and 2, the first clamp mechanism 13 is further attached to the distal end portion of the fixed receiving member 17 via a second pin 25 so as to be rotatable, and the tip portion thereof is a nut receiving seat. A mounting bolt 27 is provided for fastening the support pipe 15 by a fixed receiving member 17 and a movable receiving member 22 by a nut 26 which is attached to the screw 20 and screwed together.
Further, the second clamp mechanism 14 is also attached to the distal end portion of the fixed receiving member 24 through the second pin 25 so as to be freely rotatable, and the fixed receiving member 24 and the movable receiving member 22 by a nut 26 which is screwed together. A mounting bolt 27 for fastening the support pipe 23 is provided.

As shown in FIGS. 1 to 5, the first and second clamping mechanisms 13 and 14 are tubular projections provided on the first and second flat seats 11 and 12 of the respective fixed receiving members 17 and 24. 28, 29 and caulking holes 30, 31, and cylindrical (tubular) latching projections 32, 33 and latching holes (an example of a latching portion) 34, 35 are connected back to back.
As shown in FIGS. 4 and 5A, the above-described first and second plane seats (referred to as plane portions) 11 and 12 are squares (may be rectangular), and an axis is formed at the center of the square. The tubular projections 28 and 29, the caulking holes 30 and 31, the latching projections 32 and 33, and the latching holes 34 and 35 are formed at the corners of the virtual squares S1 and S2 formed with the same heart. Has been. This will be described in detail below.

As shown in FIG. 4, one tubular protrusion 28 and the caulking hole 30 are each an oblique pair of virtual squares S <b> 1 formed at the center of the first flat seat 11 of the fixed receiving member 17 (first clamp mechanism 13). The other tubular projections 29 and the caulking holes 31 are formed at the corner positions (corner position) a and c, respectively, and are formed at the center of the second plane seat 12 of the fixed receiving member 24 (second clamp mechanism 14). Are formed at diagonally diagonal positions a and c of the virtual square S2. Thus, the formation position of the tubular protrusion 28 and the caulking hole 30 in the first plane seat 11 and the formation position of the tubular protrusion 29 and the caulking hole 31 in the second plane seat 12 are the same position.
Here, the one tubular projection 28 is fitted into the other caulking hole 31 and the other tubular projection 29 is fitted into the one caulking hole 30, respectively, and FIGS. 1, 3, 5 (A) and (D) are fitted. As shown, the connection state between the first clamp mechanism 13 and the second clamp mechanism 14 can be maintained by increasing the width of the front side of each tubular projection 28, 29 beyond the inner diameter of each caulking hole 31, 30.

In addition, one of the latching protrusions 32 and the latching hole 34 (through hole) are in other diagonal positions of the virtual square S1 of the first plane seat 11 of the fixed receiving member 17 (first clamping mechanism 13) ( The other latching protrusion 33 and the latching hole 35 (through hole) are formed at the corner positions (b) and (d), respectively, and the virtual surface of the second flat seat 13 of the fixed receiving member 24 (second clamp mechanism 14) is provided. It is formed at other diagonal positions d and b of the square S2.
As described above, the positions where the latching protrusions 32 and the latching holes 34 are formed on the first plane seat 11 are opposite to the positions where the latching projections 33 and the latching holes 35 are formed on the second plane seat 12. It has become.

Here, one latching protrusion 32 is closely fitted into the other latching hole 35 and the other latching protrusion 33 is closely fitted into one latching hole 34 (FIG. 1, FIG. 3, FIG. 5A). ), (C), and (D), the width of the front side of each of the latching protrusions 32 and 33 remains unchanged), and the rotation of the second clamp mechanism 14 relative to the first clamp mechanism 13 can be prevented ( It has a function of demotion).
Thus, if the rotation of the second clamping mechanism 14 with respect to the first clamping mechanism 13 can be prevented, the shape of the latching protrusion is not limited to the above-described cylindrical shape, but a simple convex portion. Also, the shape of the retaining hole is not limited to the above-described through-hole, and may be a bottomed concave portion into which the above-described convex portion is fitted.

  As described above, the formation positions of the tubular projections 28 and 29, the caulking holes 30 and 31, the latching projections 32 and 33, and the latching holes 34 and 35 are set to the above-described positions, respectively. As shown, the support pipe 15 supported by the first clamp mechanism 13 and the support pipe 23 supported by the second clamp mechanism 14 can be orthogonal to each other.

Further, instead of the fixed receiving member 17 of the first clamp mechanism 13 described above, a fixed receiving member 40 shown in FIGS. 6 and 7 may be used.
In this case, the tubular projections 42 and 29 and the caulking holes 43 and 31 provided on the first and second plane seats 41 and 12 of the two fixed receiving members 40 and 24, and the cylindrical (tubular) latching projections. The two fixed receiving members 40 and 24 are connected by using 44 and 33 and latching holes (an example of a latching portion) 45 and 35. The above-described first plane seat (referred to as a plane portion) 41 is also a square, and tubular projections 42 and caulking holes are formed at the corners of a virtual square S3 formed with the same axis as the center of the square. 43, the latching protrusion 44, and the latching hole 45 are formed. This will be described in detail below.

As shown in FIG. 7, the tubular protrusions 42 and the caulking holes 43 are respectively diagonally diagonal positions (corner positions) c, a of a virtual square S <b> 3 formed at the center of the first plane seat 41 of the fixed receiving member 40. Is formed. For this reason, the formation position of the tubular protrusion 42 and the caulking hole 43 in the first plane seat 41 is opposite to the formation position of the tubular protrusion 29 and the caulking hole 31 in the second plane seat 12. Yes.
Here, one tubular protrusion 42 is fitted into the other caulking hole 31 and the other tubular protrusion 29 is closely fitted into one caulking hole 43, and the width of the front side of each tubular protrusion 42, 29 is set to each caulking hole 31. , 43 can be expanded from the inner diameter of 43, and the connection state of the two fixed receiving members 40, 24 can be maintained.

Further, the one hooking protrusion 44 and the hooking hole 45 (through hole) are respectively located at other diagonal positions (corner part positions) d and b of the virtual square S3 of the first plane seat 41 of the fixed receiving member 40. Is formed. For this reason, the formation position of the latching projection 44 and the latching hole 45 in the first plane seat 41 and the formation position of the latching projection 33 and the latching hole 35 in the second plane seat 12 are the same position. It is.
Here, one latching projection 44 is fitted into the other latching hole 35 and the other latching projection 33 is fitted into one latching hole 45, respectively (the front side of each latching projection 44, 33). The width of the other fixed receiving member 24 can be prevented from rotating with respect to one fixed receiving member 40.

Note that one side of the square, which is the first and second plane seats 11 and 12 (the same applies to the first plane seat 41), is about 45 mm (preferably about 42 to 48 mm), and is formed therein. One side of the virtual squares S1 and S2 (the same applies to the virtual square S3) is about 20 mm (preferably in a range of 18 to 23 mm).
Accordingly, the distance between the tubular protrusion 28 and the caulking hole 30 at the diagonal position and the distance between the tubular protrusion 29 and the caulking hole 31 are 28.2 mm (25.4 to 32.5 mm). The diameter (outer diameter) of the base 29 and the diameters (inner diameter) of the caulking holes 30 and 31 can be sufficiently increased.

The diameter (outer diameter) of the base of the tubular protrusions 28 and 29 is about 3 to 4.5 times the thickness (for example, 3 to 3.2 mm) of the first and second flat seats 11 and 12. (Specifically, 11 to 14 mm, for example, 13 mm). The length (projection height) of the tubular protrusions 28 and 29 is about 1.3 to 1.6 times the thickness of the first and second plane seats 11 and 12.
Furthermore, since the thickness (wall thickness) of the tubular protrusions 28 and 29 is 1.2 to 1.8 mm, each tubular protrusion 28 is calculated under the minimum conditions (the diameter of the tubular protrusion is 11 mm and the thickness is 1.2 mm). 29 has a cross-sectional area of 37 mm ² and is larger than a rivet having a diameter of 6 mm (cross-sectional area of 28 mm ² ), so that both the shear fracture strength and the tensile strength are increased.

The tubular protrusions 28 and 29 are formed by forming a small-diameter circular hole at the center position of the tubular protrusions 28 and 29 in advance and performing punching by pressing. The processing at this time varies depending on the material, but may be hot pressing or cold pressing.
The diameter of the circular hole is determined by the length, the outer diameter, and the inner diameter of the tubular protrusions 28 and 29. Since the metal volume does not change even when pressed, it can be easily calculated by a known method.

On the exit side of the caulking holes 30 and 31 (that is, the side from which the tubular projections 28 and 29 protrude), as shown in FIGS. 5B to 5D, a frustoconical shape whose diameter gradually increases outward. A tapered portion 46 is provided. FIGS. 5B to 5D are cross-sectional views taken along the line RR ′ of FIG.
The taper angle of the tapered portion 46 is about 40 to 50 degrees, and the maximum diameter on the protruding side is about the inner diameter of the caulking holes 30 and 31 +1.8 to 3.5 mm. The tapered portion 46 is preferably formed at the same time when the caulking holes 30 and 31 are pressed.

Moreover, the latching protrusions 32 and 33 should just be what can prevent rotation of the 2nd clamp mechanism 14 with respect to the 1st clamp mechanism 13 as mentioned above, and the diameter of a base is 1st mentioned above, for example. The thickness of the second plane seats 11 and 12 is about 0.5 to 2 times, and the length (projection height) is about 0.3 to 1 times the thickness of the first and second plane seats 11 and 12. It's okay.
The latching protrusions 32 and 33 can be formed by the same method as the formation of the tubular protrusions 28 and 29 described above.

A conical taper portion 47 whose diameter gradually increases on the outer side is also provided on the exit side of the latching holes 34 and 35 (that is, the side on which the latching projections 32 and 33 project). May be.
The tapered portion 47 is preferably formed at the same time when the retaining holes 34 and 35 are punched out.

5 (B) to 5 (D) show a processing method for the tubular protrusion 29 (the same applies to the tubular protrusion 28). However, the tubular protrusions 28 and 29 are inserted into the caulking holes 31 and 30, respectively. The diameter expansion process along the taper portion 46 is performed on the tip portions of the tubular protrusions 28 and 29 by the punch. The diameter expansion allowance in this case is preferably about 1.2 to 2 mm on one side. Thereby, it has sufficient proof stress.
Further, if chamfering (0.2 to 0.5 mm) is performed on the outer side of the distal end portion of the tubular projections 28 and 29, the outer diameter of the base portion of the tubular projections 28 and 29 and the inner diameter of the caulking holes 31 and 30 can be matched. Thereby, the play of the tubular protrusions 28 and 29 and the caulking holes 31 and 30 can be eliminated.

The present invention has been described above with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and is described in the claims of the utility model registration. Other embodiments and modifications conceivable within the scope of the matter are also included. For example, a case where the clamp fitting device of the present invention is configured by combining some or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
In the above-described embodiment, the first and second clamp mechanisms are configured to fix the support pipes having the same diameter. However, the first and second clamp mechanisms may sandwich the support pipes having different diameters. .
Moreover, in the said embodiment, although the formation position of the tubular projection, the caulking hole, the latching projection, and the latching portion was set so that the support pipes supported by the first and second clamping mechanisms were orthogonal to each other. By changing these formation positions, the support pipes supported by the first and second clamp mechanisms can be made parallel.

10: Clamp metal fitting device, 11: 1st plane seat, 12: 2nd plane seat, 13: 1st clamp mechanism, 14: 2nd clamp mechanism, 15: Support pipe, 16: 1st recessed part, 17: fixed receiving member, 18: first pin, 19: opening, 20: nut receiving seat, 21: second recess, 22: movable receiving member, 23: support pipe, 24: fixed receiving member, 25: Second pin, 26: nut, 27: mounting bolt, 28, 29: tubular projection, 30, 31: caulking hole, 32, 33: latching projection, 34, 35: latching hole (latching portion), 40 : Fixed receiving member, 41: First flat seat, 42: Tubular protrusion, 43: Caulking hole, 44: Locking protrusion, 45: Locking hole (holding part), 46, 47: Tapered part

Claims (4)

A fixed receiving member having a first concave portion on the inner side that matches the outer surface of the support pipe, and a base end portion of the fixed receiving member that is pivotally connected via a first pin. A receiving seat is formed, and a movable receiving member having a second concave portion that coincides with the outer side surface of the support pipe is attached to the front end portion of the fixed receiving member via a second pin. The first and second clamping mechanisms each having a tip portion mounted on the nut receiving seat and provided with a fixed receiving member and a mounting bolt for fastening the support pipe by the movable receiving member by a nut to be screwed together. In the clamp fitting device connected back to back via the first and second plane seats formed on each of the fixed receiving members,
Tubular protrusions and caulking holes into which the tubular protrusions are closely fitted are provided at oblique diagonal positions a and c of virtual squares formed at the centers of the first and second plane seats, respectively. A hooking protrusion and a hooking portion into which the hooking protrusion fits closely are provided at the other diagonal positions b and d of the virtual square formed at the center of the second plane seat,
A clamp fitting device, wherein the first and second clamping mechanisms are connected using the tubular projection and the caulking hole, and the latching projection and the latching portion.   2. The clamp fitting device according to claim 1, wherein the support pipes supported by the first and second clamp mechanisms are orthogonal to each other, and the latch protrusions and the latches formed on the first and second plane seats. The clamp metal fitting device characterized by the formation position of a part being reverse.   2. The clamp fitting device according to claim 1, wherein the support pipes supported by the first and second clamp mechanisms are orthogonal to each other, and the tubular protrusions formed on the first and second plane seats and the caulking holes are formed. A clamp fitting device, wherein the forming positions are reversed.   The clamp fitting device according to any one of claims 1 to 3, wherein a truncated cone-shaped taper portion is formed on the exit side of the caulking hole into which the tubular protrusion is fitted. .

Images