JPH0651393U - Scaffolding frame fittings - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a scaffolding frame coupling fitting that does not have the possibility of the hook coming out. [Structure] The locking portion 22 is provided at the center, and the insertion portions 23 are provided at both upper and lower sides.
A connecting pipe 21 having 24, a short rod portion 26 at one end, and an L-shaped hook rod 25 having a long rod portion 27 at the other end,
A through hole is formed by forming a through hole on the opposing wall surface of the locking part, the long rod part of the hook bar is slidably inserted into the through hole, and the short rod part of the hook bar is inserted into one insertion part of the connecting pipe. A spring 32 that forms a member 34 and urges the hook rod toward the connecting pipe on the long rod portion of the hook rod.
In the scaffolding frame coupling fitting mounted with, the retaining pipe 30 for connecting the through hole to the inside of the through hole of the wall surface facing the locking portion.
, The long rod is inserted into the pipe, a spring is attached between the inner surface of the pipe and the outer surface of the long rod, and the spring is covered with the cap 33 and locked. With the hook rod biased toward the connecting pipe, the length of the long rod portion and the cap of the tip is formed such that the tip of the cap does not project outward from the through hole.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a scaffolding frame coupling fitting for connecting a lower scaffolding pipe and an upper scaffolding pipe when assembling a scaffolding frame composed of pipes.

[0002]

[Prior art]

 Conventionally, as this type of coupling fitting, there is one shown in FIGS. 4 and 5.

This one has a locking part 2 in the center, a connecting pipe 1 having insertion parts 3 and 4 on both sides thereof, a short rod part 6 at one end, and an axial center of the connecting pipe 1 at the other end. It is composed of an L-shaped hook rod 5 having a long rod portion 7 having a length penetrating in a direction orthogonal to it. Through holes 8 and 9 are formed in the engaging wall 2 at the center of the connecting pipe 1 on the opposing wall surfaces at positions orthogonal to the axis. The long rod portion 7 of the L-shaped hook rod 5 is slidably inserted into the through holes 8 and 9. Further, a through hole 10 into which the short rod portion 6 of the L-shaped hook rod 5 is inserted is formed on the wall surface of the insertion portion 3 above the connection pipe 1. A spring 11 is attached to the long rod portion 7 of the hook 5 inserted through the connecting pipe 1, and the hook 5 is biased toward the connecting pipe 1 by the spring 11.

When assembling the scaffolding frame, first, the lower insertion portion 4 of the connecting pipe 1 is inserted into the upper end of the lower scaffolding pipe 15 to form the lower insertion portion 4 of the connecting pipe 1. The connecting pipe 1 is added to the upper end of the lower scaffolding pipe 15 by inserting a locking pin (not shown) into the through hole 12 by aligning the through hole formed at the upper end of the lower scaffolding pipe A. Next, pulling the L-shaped hook rod 5 to bring the short rod portion 6 out of the through hole 10 of the insertion portion 3 of the connecting pipe 1, and while rotating the short rod portion 6 of the hook rod 5 downward, The insertion part 3 above the connecting pipe 1 is inserted into the lower end of the scaffolding pipe 16, and the positions of the through hole 17 formed in the lower end of the upper scaffold pipe 16 and the through hole 10 formed in the inserting part 3 of the connecting pipe 1 are set. After the adjustment, the short rod portion 6 of the hook rod 5 is rotated upward, and the hook rod 5 is pulled to connect the short rod portion 6 to the through hole 17 of the upper scaffold pipe 16 and the through hole 10 of the insertion portion 3 of the connecting pipe 1. Insert into.

In this way, the lower scaffolding pipe 15 and the upper scaffolding pipe 16 are connected via the connecting pipe 1.

[0006]

[Problems to be solved by the device]

 By the way, a scaffolding board is laid over the horizontal frame 18 of the lower scaffolding pipe 15 assembled as described above.

However, in the above-mentioned conventional scaffolding frame coupling fitting, as shown in FIG. 5, since the tip of the long rod portion 7 of the hook 5 projects outward from the through hole 8, the scaffolding board is hung. At this time, the scaffold plate hits the tip of the long rod 7 protruding outward, the hook 5 moves against the spring 11, and the short rod 7 of the hook 5 comes out of the through holes 10 and 17, There is a risk that the hook 5 will come off.

Therefore, the present invention is intended to prevent the hook rod from slipping out as described above.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has a connecting pipe 21 having a locking portion 22 in the center, insertion portions 23 and 24 on both upper and lower sides thereof, a short rod portion 26 at one end, and a long rod at the other end. It is composed of an L-shaped hook 25 having a rod 27, and through holes 28 and 29 are formed on the opposite wall surfaces of the central locking portion 22, and the L-shaped hook 25 is formed in the through holes 28 and 29. Of the L-shaped hook rod 25 is formed in the insertion portion 23 of the connecting pipe 21 through which the short rod portion 26 of the L-shaped hook rod 25 is inserted. In the scaffolding frame connecting fitting in which the spring 32 for urging the hook rod 25 toward the connecting pipe 21 side is attached to the long rod portion 27 of the above, the through holes 28, 29 formed in the facing wall surfaces of the central locking portion 22 are provided. A retaining pipe 30 that connects the through holes 28 and 29 is fixed to the inside of the retaining pipe 30. Insert the long rod 27 into the rod 30, install a spring 32 between the inner surface of the retaining pipe 30 and the outer surface of the long rod 27, and attach the spring 32 to the end of the long rod 27 with the cap 33. The length of the long rod 27 and the cap 33 at the tip thereof is set so that the tip of the cap 33 is removed from the through hole 28 when the hook 25 is biased toward the connecting pipe 21 by the spring 32. It was formed to a length that did not project toward one side.

[0010]

[Action]

 With the above configuration, the long rod portion 27 of the hook rod 25 and the cap 33 at the tip thereof are housed in the retaining pipe 30, and since the hook rod 25 does not project outward, the scaffolding plate is hung over. However, contact between the scaffolding plate and the hook 25 is prevented, and the hook 25 does not come off unexpectedly.

[0011]

【Example】

 Hereinafter, an embodiment of the scaffold frame connecting fitting according to the present invention will be described.

A scaffolding frame coupling fitting according to the present invention has a locking portion 22 in the center, a connecting pipe 21 having insertion portions 23 and 24 on both sides thereof, a short rod portion 26 at one end, and a other end at the other end. It is combined with an L-shaped hook rod 25 having a long rod portion 27 having a length penetrating in a direction orthogonal to the axis of the connecting pipe 21.

The engaging portion 22 at the center of the connecting pipe 21 is formed by covering the connecting pipe 21 with a separate pipe, and caulking and fixing them. The engaging portion 22 is formed with through holes 28 and 29 into which the long rod portion 27 of the hook rod 25 is slidably inserted, on the opposing wall surface at a position orthogonal to the axis of the connecting pipe 21. . The through holes 28 and 29 are formed to have a diameter larger than that of the long rod portion 27, and a retaining pipe 30 is put around the long rod portion 27. Both ends of the retaining pipe 30 are fixed to the through holes 28 and 29, and the end portion on the side of the through hole 28 is fixed so as not to project outward from the wall surface of the locking portion 22, and the end portion on the side of the through hole 29. Is fixed by protruding outward from the wall surface of the locking portion 22. A guide wall 31 for guiding both side surfaces of the hook rod 25 is integrally formed at an end portion of the retaining pipe 30 protruding from the through hole 29.

The inner surface of the retaining pipe 30 is formed with a small diameter near the through hole 29 so as to fit snugly around the long rod portion 27 of the hook 25, and from this small diameter portion to the end of the through hole 28. Has a large diameter. A spring 32 that biases the hook 25 toward the connecting pipe 21 is housed in a space formed between the large diameter portion and the long rod 27 of the hook 25. At the tip of the long rod portion 27 of the hook rod 25, a cap 33 for preventing the spring 32 from coming off and holding the pipe 30 is covered and fixed from the through hole 28 side. The length of the cap 33 and the long rod 27 is such that the tip of the cap 33 is outward from the through hole 28 of the engaging portion 22 when the hook 25 is urged toward the connecting pipe 21 by the spring 32. It is formed to have a length that does not protrude into.

A through hole 34 into which the short rod portion 26 of the hook rod 25 is inserted is formed in the insertion portion 23 above the connection pipe 21. In addition, the hook rod 25 is pulled out to the insertion portion 24 below the connecting pipe 21, and the hook rod 25 is rotated so that the rod rod 26 is located below the hook rod 26. A through hole 35 into which is inserted is formed.

A through hole 37 corresponding to a locking hole 36 formed at an upper end of the lower scaffold pipe 15 is opposed to an end portion of the lower insertion portion 24 of the connecting pipe 21 so as to be orthogonal to an axis. It is formed in position. The position of the locking hole 36 formed at the upper end of the lower scaffold pipe 15 may differ depending on the type of the lower scaffold pipe 15. That is, the position of the locking hole 36 may be, for example, 70 mm or 80 mm from the upper end. Therefore, when the position of the through hole 37 formed in the lower insertion portion 24 is, for example, 70 mm from the lower end surface of the locking portion 22, the upper insertion portion 23 is located 80 mm from the upper end surface of the locking portion 22. If the through hole 38 is formed at the position, the scaffolding frame coupling fitting can be used upside down to be used for two types of lower scaffolding pipes 15 having different positions of the locking holes 36. When using the scaffolding frame coupling fittings upside down, pull out the hook rod 25 and rotate the hook rod 25 so that it faces in the opposite direction.

Next, the tip surface of the short rod portion 26 of the hook rod 25 is an inclined surface facing the end portion side of the insertion portion 23 in which the through hole 34 into which the short rod portion 26 is fitted is formed. The outer end of this inclined surface is located outside the through hole 34, and when the lower end of the upper scaffold pipe 16 is inserted into the insertion portion 23 as shown in FIG. The lower end surface of the pipe 16 contacts the inclined surface. Thus, the lower end surface of the upper scaffold pipe 16 hits the inclined surface of the tip of the short rod portion 26 of the hook rod 25, and when the weight of the upper scaffold pipe 16 is applied to the inclined surface of the short rod portion 26, the force causes the hook portion to hook. The rod 25 moves outward while being guided by the guide wall 31 against the spring 32, the short rod portion 26 slips out of the through hole 34, and the upper scaffold pipe 16 moves the locking portion 22 below the short rod portion 26. It is inserted until it hits the top surface. When the lower end surface of the upper scaffolding pipe 16 hits the upper end surface of the locking portion 22, the locking hole 17 of the upper scaffolding pipe 16 is located at the tip of the short rod 26, and the locking hole 17 is locked by the spring 32. The hook rod 25 is pulled back so that the tip of the short rod portion 26 is caught.

As described above, if the tip end surface of the short rod portion 26 is formed as an inclined surface, it is not necessary to pull out the hook rod 25 by hand when inserting the upper scaffold pipe 16, so that the scaffolding is not required. The frame assembly work can be performed quickly.

[0019]

[Effect of device]

 As described above, according to the present invention, it is possible to provide a safe scaffolding frame coupling fitting that does not cause the hook rod 25 to slip out.

Further, by making the tip end surface of the hook rod 25 into an inclined surface, there is also an effect that the work of assembling the scaffolding frame can be performed quickly.

Furthermore, by forming through holes 37 and 38 at different distances from the end faces of the locking portions 22 at the ends of the upper and lower insertion portions 23 and 24, it is used for assembling two different types of scaffold pipes. There is also an effect that you can.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a scaffolding frame fitting according to the present invention.

2A is a vertical cross-sectional view of the above, FIG. 2B is a side view of the same.

FIG. 3 is a diagram showing a usage state of the same as above.

FIG. 4 is an exploded perspective view of a conventional example.

FIG. 5 is a vertical sectional view showing a main part of a conventional example.

[Explanation of symbols]

 21 connecting pipe 22 locking part 23, 24 insertion part 25 hook rod 26 short rod part 27 long rod part 28, 29, 34, 35, 37, 38 through hole 30 retaining pipe 31 guide wall 32 spring 33 cap

Claims (3)

[Scope of utility model registration request] 1. An L-shaped structure having a locking portion 22 in the center, a connecting pipe 21 having insertion portions 23 and 24 on both upper and lower sides thereof, a short rod portion 26 at one end, and a long rod portion 27 at the other end. Hook 2
5, through holes 28 and 29 are formed in the opposing wall surfaces of the central locking portion 22, and the long rod portion 27 of the L-shaped hook rod 25 is slidably inserted into the through holes 28 and 29. A through hole 34 for inserting the short rod portion 26 of the L-shaped hook rod 25 is formed in one insertion portion 23 of the connecting pipe 21, and the hook rod 25 is attached to the long rod portion 27 of the L-shaped hook rod 25. In a scaffolding frame coupling fitting equipped with a spring 32 for urging the connecting pipe 21 side,
Through hole 2 formed in the wall surfaces of the central locking portion 22 facing each other
A retaining pipe 30 that connects the through holes 28 and 29 is fixed to the inside of the retaining pipes 8 and 29, and the long rod portion 27 is inserted into the retaining pipe 30. The inner surface of the retaining pipe 30 and the long rod portion 27 are A spring 32 is attached between the outer surface and the outer surface, and the spring 32 is locked by covering the tip of the long rod 27 with a cap 33, and the spring 25 urges the hook 25 toward the connecting pipe 21. Long rod 27 and cap 33 at its tip
The scaffolding frame coupling fitting is characterized in that the length of the cap 33 is formed so that the tip of the cap 33 does not project outward from the through hole 28. 2. The tip surface of the short rod portion 26 of the hook rod 25 is
A slanted surface facing the end side of the insertion portion 23 in which the through hole 34 is formed is provided, the outer end of this slanted surface is located outside the through hole 34, and the long rod 27 of the hook 25 is inserted. The scaffolding frame coupling fitting according to claim 1, wherein guide walls 31 for guiding both side surfaces of the hook 25 are formed on both sides of the through hole 29 of the stopper portion 22. 3. The insertion portions 2 on both the upper and lower sides of the locking portion 22.
3 and 24 are formed with through holes 34 and 35, respectively, into which the short rod portions 26 of the hook 25 are inserted, and through holes 37 and 38 for inserting locking pins are formed at the ends of the both insertion portions 23 and 24, respectively. And a through hole 3 formed at the ends of both insertion portions 23 and 24.
The scaffolding frame coupling fitting according to claim 1 or 2, wherein one of the distances from the locking holes 22 to the locking portions 22 is longer than the other.