JP2021050490A - Structure of temporary scaffold and connecting metal fitting used therefor - Google Patents

Abstract

To provide a structure of a temporary scaffold capable of constructing another work floor on an upper part by adding a support pipe when necessary without projecting the support pipe upward from the work floor, and a connection metal fitting used for the structure.SOLUTION: In a structure 10 of the temporary scaffold which has a connection fitting 17 connecting a support pipe 12 and an extension support pipe 13 and a horizontal pipe 18 with a wedge mechanism mounted on a hooking fitting 11, the height of the tip of the support pipe 12 is the same as the height of the upper end of the horizontal pipe 18 within an error range of ±2 cm, and insertion parts 14 and 15 of the connection fitting 17 have a lock mechanism 19a provided with projecting pins 21 and 22 oppositely arranged and biased outward by an elastic member 29, respectively; when the insertion parts 14 and 15 are completely mounted on the support pipe 12 and an extension support pipe 13, the projecting pins 21 and 22 are fitted into latching holes 23 and 24 provided to face each other at intermediate positions of the support pipe 12 and the extension support pipe 13.SELECTED DRAWING: Figure 1

Description

The present invention relates to a structure of a flat stage using a temporary scaffold (assembly scaffold) constructed at a site of construction or civil engineering work, and a connecting metal fitting used for the structure.

At construction and civil engineering sites, as shown in FIG. 9, the required number of long support pipes 82, which are provided with U-shaped hook metal fittings 80 in different heights in the front-back and left-right directions, are erected. To do. Then, the supporting column pipes 82 (the other is not shown) are connected and held by horizontal pipes (horizontal members) 83 having metal fittings 81 to be hooked on the hooking metal fittings 80 at both ends, and are horizontal between the horizontal pipes 83. Scaffolding boards (scaffolding members) are erected to form temporary scaffolding having a worker's work floor (floor, seating) around or inside a building under construction. In the figure, 86 indicates a wedge material. The connection between the support pipe 82 and the horizontal pipe 83 is described in detail in Patent Documents 1 and 2.

JP-A-2010-222946 JP-A-2017-53094

However, the structure of the conventional temporary scaffold has the following problems.
Since the conventional member for temporary scaffolding is used as it is as the support pipe 82, a long pipe or an insertion pipe (a connecting pipe for adding the support is fixed to the support pipe) on the hook 80. There is), which protrudes upward from the work floor and interferes with the work. Further, a space may be provided on the work floor, and a work floor may be added on the work floor. In such a case, in the conventional method, the support pipe is replaced and connected on the replaced support pipe. Since another support column pipe having the hook metal fitting 80 is attached via the metal fitting, there is a problem that the work takes time and effort. Here, it is possible to attach another support pipe on the conventional support pipe 82 via the connecting metal fitting, but there is a problem that the connecting metal fitting is difficult to be fixed because the support pipe 82 is simply a pipe.

The present invention has been made in view of such circumstances, and is a temporary scaffolding capable of constructing another work floor on the upper part by adding the support pipes when the support pipes do not protrude upward from the work floor and if necessary. It is an object of the present invention to provide a structure and a connecting metal fitting used for the structure.

The structure of the temporary scaffold according to the first invention according to the above object is a support pipe used for the temporary scaffold in which a U-shaped hook fitting is provided facing the front outer peripheral surface in a plan view, and the support. Both sides of an extension strut pipe that is attached to the tip side of the pipe and has the same diameter as the strut pipe, and first and second insertion portions that are fitted into the tip end portion of the strut pipe and the base end portion of the extension strut pipe, respectively. The middle part is a temporary scaffold structure having a connecting metal fitting having the same diameter as the support pipe and a horizontal pipe with a wedge mechanism attached to the hooking metal fitting.
The height of the tip of the strut pipe is the same as the height of the upper end of the horizontal pipe with the wedge mechanism within an error range of ± 2 cm, and the first and second insertion portions are respectively urged outward by the elastic member. It has a locking mechanism with protruding pins arranged so as to face each other, and when the first and second insertion portions are completely attached to the support column pipe and the extension support column pipe, the support column pipe and the extension support column pipe The protruding pin is fitted into a hook hole provided so as to face an intermediate position, and the first and second insertion portions are not pulled out from the support column pipe and the extension support column pipe.

In the structure of the temporary scaffold according to the first invention, the hooking hole provided in the support column pipe holds the hooking metal fitting between the upper end position and the lower end position of the hooking metal fitting provided so as to face each other. It is preferably formed while avoiding it.

Further, in the structure of the temporary scaffold, the strut pipe is provided via a short auxiliary strut pipe provided with the U-shaped hook fitting and another connecting fitting having the same structure as the connecting fitting under the short auxiliary strut pipe. It may also have a lower strut pipe to be connected. The auxiliary strut pipe and the lower strut pipe are provided with hook holes facing each other into which a protruding pin having an elastic member of the other connecting metal fitting is fitted.

The connecting metal fitting according to the second invention is a connecting metal fitting used for the structure of the temporary scaffold according to the first invention, and the protruding pins arranged so as to face each other are in one circumferential direction or both circumferential directions, respectively. It has an inclined slope, and the protruding pin is disengaged from the hook hole by rotating the extension support pipe or the connecting metal fitting.

In the structure of the temporary scaffold according to the first invention, since the height of the tip of the support pipe is the same as the height of the upper end of the horizontal pipe with the wedge mechanism, the work floor is constructed on the horizontal pipe with the wedge mechanism. However, the support pipes do not interfere with the placement and movement of workers and other objects.
When extending this support pipe, it has first and second insertion portions on both sides that are fitted into the tip end of the strut pipe and the base end of the extension strut pipe, respectively, and the intermediate portion is the diameter of the strut pipe. Although connecting fittings having the same diameter are used, the first and second insertion portions of the connecting fitting each have protruding pins arranged to face each other and are urged to the outside by an elastic member, and the first and second insertion portions are provided. When is completely attached to the strut pipe and the extension strut pipe, the protruding pin is fitted into the hook hole provided opposite to the intermediate position of the strut pipe and the extension strut pipe, so that the strut pipe and the extension strut pipe are connected. The first and second insertion parts of the metal fitting cannot be easily removed.

In the structure of the temporary scaffold according to the first invention, a hook hole provided in the support pipe is formed between the upper end position and the lower end position of the hook metal fittings provided so as to avoid the hook metal fittings. If so, the hooking hole and the hooking metal fitting do not interfere with each other, so that the installation work and the dismantling work are facilitated.

If the strut pipe has an auxiliary strut pipe provided with a U-shaped hook and a lower strut pipe connected via another connecting bracket having the same structure as the connecting bracket under the auxiliary strut pipe, the strut pipe You can adjust the length of.

Further, the connecting metal fitting according to the second invention has a slope in which the protruding pins arranged to face each other are inclined in one circumferential direction or both circumferential directions with respect to the hook holes having a circular cross section. Therefore, by rotating the extension strut pipe or the connecting metal fitting, the protruding pin is disengaged from the hook hole, and the connecting metal fitting can be easily removed from the strut pipe and the extension strut pipe.

It is explanatory drawing of each part of the structure of a temporary scaffold which concerns on 1st Embodiment of this invention. It is a partial perspective view of the state in which the structure of the temporary scaffold is assembled. It is a partial perspective view of the state in which the structure of the temporary scaffold is assembled. (A) to (D) are partially omitted explanatory views of the lock mechanism used for the structure of the temporary scaffold. (A) to (C) are partially omitted explanatory views of the lock mechanism according to the modified example used for the structure of the temporary scaffold. It is sectional drawing of the lock mechanism. It is explanatory drawing of each part of the structure of a temporary scaffold which concerns on 2nd Embodiment of this invention. It is a partially omitted explanatory view of the structure of the temporary scaffolding. It is a partially omitted explanatory view of the structure of the conventional temporary scaffolding.

The structure 10 of the temporary scaffold according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
As shown in FIGS. 1 and 2, the structure 10 of the temporary scaffold has a temporary scaffold in which U-shaped hooking metal fittings 11 are provided on the outer peripheral surface on the front side in a plan view, facing the front and back and left and right, and vertically. The strut pipe 12 used for the above, the extension strut pipe 13 attached to the tip side of the strut pipe 12 and having the same diameter as the strut pipe 12, and the tip end portion of the strut pipe 12 and the base end portion of the extension strut pipe 13, respectively. The first and second insertion portions 14 and 15 are provided on both sides, and the intermediate portion 16 has a connecting metal fitting 17 having the same diameter as the support pipe 12 and a horizontal portion with a wedge mechanism attached to the hooking metal fitting 11. It has a pipe 18.

As shown in FIGS. 2 and 3, the height of the tip of the tip 12a of the support pipe 12 is the same as the height of the top of the horizontal pipe 18 with the wedge mechanism in the mounted state (error range of ± 2 cm, preferably -12 mm to -12 mm). (Including an error range of +12 mm). Note that 18b indicates a wedge. Both the insertion portions 14 and 15 are provided with front and rear protruding pins 21 and 22 arranged to be urged outward from the round hole 19 by a lock mechanism 19a using an elastic member (spring) 29, respectively, and the insertion portion 14 is provided. , 15 are fully mounted on the strut pipe 12 and the extension strut pipe 13, and the protruding pins 21 and 22 are provided in the hook holes 23 and 24 provided in the middle of the strut pipe 12 and the extension strut pipe 13 so as to face each other in the front-rear direction. The structure is such that the insertion portions 14 and 15 of the connecting metal fitting 17 cannot be easily removed from the support column pipe 12 and the extension support column pipe 13. The hook hole 23 is located at an intermediate position in the height direction and the circumferential direction of the hook metal fittings 11 arranged to face each other of the support pipe 12 (that is, between the upper end position and the lower end position of the hook metal fittings 11 provided facing each other). It is formed at a position avoiding the hook 11). Here, as shown in FIGS. 4A to 4D, the lock mechanism 19a freely rotates the operating members 27, 28 and the operating members 27, 28 having the protruding pins 21 and 22 formed at the tip thereof. It has a connecting pin 30 to be connected and an elastic member (spring) 29 attached to the connecting pin 30.

In this embodiment, the diameters of the column pipe 12, the extension column pipe 13, and the intermediate portion 16 of the connecting metal fitting 17 are the same (for example, the outer diameter is 48.6 mm). In this case, the outer diameters of the first and second insertion portions 14 and 15 are 41.8 to 42.7 mm, the protruding length thereof is 125 mm, and the length A of the connecting metal fitting 17 is 365 mm. The length B of the intermediate portion 16 is 115 mm.

As shown in FIG. 4, the protruding pins 21 and 22 are always urged outward in diameter by the elastic member 29, and the connecting metal fitting 17 is attached to the support pipe 12 and the extension support pipe 13. It penetrates through the round holes 19 formed in the second insertion portions 14 and 15 and the hook holes 23 and 24 formed in the strut pipe 12 and the extension strut pipe 13. As a result, the strut pipe 12 and the extension strut pipe 13 are not easily disassembled from the connecting metal fitting 17.

The front side of the protruding pins 21 and 22 has a triangular shape in a plan view and has slopes (sliding surfaces) 25 and 26 on one side in the circumferential direction, and the support pipe 12, the extension support pipe 13 or the connecting metal fitting 17 is rotated. The protruding pins 21 and 22 come out of the hook holes 23 and 24 (lock mechanism 19a). In this embodiment, slopes 25 and 26 that are inclined only in the circumferential direction are provided on the front side of the protruding pins 21 and 22, but slopes that are inclined on both sides in the circumferential direction can also be provided. Further, in FIG. 4, an inclined surface (sliding surface) that descends outward is also provided on the upper side of the protruding pins 21 and 22, so that the retracted protruding pins 21 and 22 can be easily pulled out from the hook holes 23 and 24. You can also do it.
The insertion ends of the first and second insertion portions 14 and 15 are reduced in diameter to a substantially truncated cone shape by drawing, and can be smoothly inserted into the support pipe 12 or the extension support pipe 13 inside the reduced diameter portion. The ends of the operating members 27 and 28 are in contact with each other.
The basic structure of these locking mechanisms is described in detail in Japanese Patent Application Laid-Open No. 2010-261296 previously disclosed by the applicant.

Next, the locking mechanism 35 according to the modified example will be described with reference to FIGS. 5A, 5B, and 5C.
The lock mechanism 35 is formed by bending a strip-shaped plate member 36, and is formed by bending a first pipe (for example, a support pipe 12) and a second pipe (for example, a first insertion portion 14) mounted in the first pipe. The through holes (hanging holes 23, round holes 19) provided at 180 degree positions of the first pipe and the second pipe are connected via the protruding pieces 36a and 36b (corresponding to the protruding pins 21 and 22). It is a pipe connecting tool.

The strip-shaped plate material 36 is bent into a shape having two side pieces 37, 38 in a substantially upright state and a continuous horizontal piece 39 on the upper part of the two side pieces 37, 38, and the tips of the side pieces 37, 38 or the tips of the side pieces 37, 38. The projecting pieces 36a and 36b are formed by bending the projecting plate pieces 40 and 41 formed on both outer sides of the strip-shaped plate member 36 in the width direction toward the center from the tip portions of the side pieces 37 and 38, respectively. The projecting pieces 36a and 36b have an inclined surface that is inserted into the through hole at the time of use and is symmetrically inclined and tapered to the outside, and an inclined side whose upper portion descends toward the outside. .. As a result, when the second pipe is rotated relative to the first pipe, the inclined surface and the inclined side come into contact with the end of the through hole, and the protruding pieces 36a and 36b are pushed in to release the hooked state. To. The elastic member that urges the protruding pieces 36a and 36b to the outside is formed by the two side pieces 37 and 38 and the horizontal piece 39 itself connected to the upper portion thereof.

When this lock mechanism 35 is used, as shown in FIG. 6, the lock mechanism 35 is attached to the insertion portion 45 of the connecting metal fitting 44 whose tip has been drawn. In this case, the protruding pieces 36a and 36b are fitted into the round holes 48 provided so as to face the 180-degree position of the insertion portion 45 in a state of protruding outward. In addition, 46a, 46b, 47 indicate a reinforcing rib. Further, the locking mechanism 35 is described in detail in Japanese Patent Application Laid-Open No. 2019-60103, which the applicant has previously applied for and published.

Subsequently, the structure 10 of the temporary scaffold forming the plane stage according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.
In this embodiment, a strut pipe 12, a connecting metal fitting 17 joined onto the strut pipe 12, and an extension strut pipe 13 connected to the strut pipe 12 are provided. At the upper position of the support pipe 12, paired hook metal fittings 11 are provided up and down on the front, back, left and right sides, and the horizontal pipe 18 with a wedge mechanism is connected. The (upper end) height position of the tip end portion 12a of the strut pipe 12 coincides with the upper end height of the horizontal pipe 18 within an error range of ± 2 cm (preferably ± 1 cm).

The first insertion portion 14 of the connecting metal fitting 17 is fitted into the tip end portion 12a of the support pipe 12, and the protruding pins 21 and 22 protruding from the round hole 19 provided so as to face the 180 degree position of the insertion portion 14 are provided. , The connecting metal fitting 17 is prevented from coming out of the support pipe 12 in the state of being projected from the hook hole 23 provided in the support pipe 12. When removing the connecting metal fitting 17 from the support pipe 12, the support pipe 12 is fixed and the connecting metal fitting 17 is turned, or the opposing protruding pins 21 and 22 are pushed inward from the outside to turn the connecting metal fitting 17. ..

Next, when the extension support pipe 13 is added to the support pipe 12 via the connecting metal fitting 17, the second insertion portion 15 is inserted into the extension support pipe 13 having the hook hole 24 facing the lower predetermined position. Then, the protruding pins 21 and 22 are fitted into the hook holes 24 of the extension support pipe 13. As a result, the connection of the strut pipe 12, the connecting metal fitting 17, and the extension strut pipe 13 is completed, and when the extension strut pipe 13 is unnecessary, the connecting metal fitting 17 and the extension strut pipe 13 are removed. If these are removed, the tip portion 12a of the strut pipe 12 can be aligned with the height position of the work floor (seat) 48a at the upper end position of the horizontal pipe 18 with a wedge mechanism, and the strut pipe 12 does not become an obstacle.

Subsequently, the structure 50 of the temporary scaffold forming the plane stage according to the second embodiment of the present invention will be described with reference to FIGS. 7 and 8, but the same components as those of the first embodiment will be described. Will be assigned the same number and detailed description will be omitted. In the structure 50 of the temporary scaffold, the strut pipe 51 includes a short auxiliary strut pipe 52 provided with a U-shaped hook 11 and another connecting fitting 53 having the same structure as the connecting fitting 17 under the short auxiliary strut pipe 52. It has a lower strut pipe 54 connected via the pipe. It should be noted that the auxiliary strut pipe 52 and the lower strut pipe 54 are round holes (hook holes) in which the protruding pins 21 and 22 provided in the connecting metal fitting 53 and having elastic members and urged outward in the radial direction are fitted. Example) It has 23a and 23b. The protruding pins 21 and 22 are fitted into the round holes 23a and 23b to connect the auxiliary strut pipe 52 and the lower strut pipe 54.

In addition. The round hole 56 shown in FIGS. 1 and 7 is a through hole for a welding plug, and a pipe forming an inner insertion portion and a pipe forming an outer intermediate portion are welded and fixed.
In the first and second embodiments, the mechanical mechanism shown in FIG. 4 is used for the pipe locking mechanism, but a plate-shaped locking mechanism can also be used as shown in FIGS. 5 and 6. ..

10: Temporary scaffolding structure, 11: Hanging bracket, 12: Strut pipe, 12a: Tip, 13: Extension strut pipe, 14: First insertion part, 15: Second insertion part, 16: Intermediate part, 17: Connecting bracket, 18: Horizontal pipe with wedge mechanism, 18b: Wedge, 19: Round hole, 19a: Lock mechanism, 21, 22: Protruding pin, 23, 24: Hook hole, 23a, 23b: Round hole, 25 , 26: Slope, 27, 28: Operating member, 29: Elastic member (spring), 30: Connecting pin, 35: Lock mechanism, 36: Strip plate material, 36a, 36b: Projecting piece, 37, 38: Side piece, 39 : Horizontal piece, 40, 41: Protruding plate piece, 44: Connecting metal fitting, 45: Insertion part, 46a, 46b, 47: Reinforcing rib, 48: Round hole, 48a: Work floor, 50: Temporary scaffolding structure, 51: Strut pipe, 52: Auxiliary strut pipe, 53: Connecting bracket, 54: Lower strut pipe, 56: Round hole

Claims (4)

A strut pipe used for a temporary scaffold in which a U-shaped clasp is provided facing the outer peripheral surface on the front side in a plan view, and a strut pipe attached to the tip side of the strut pipe and having the same diameter as the strut pipe. It has an extension strut pipe and first and second insertion portions to be fitted into the tip end portion of the strut pipe and the base end portion of the extension strut pipe, respectively, and the intermediate portion has the same diameter as the diameter of the strut pipe. It is a structure of a temporary scaffold having a connecting metal fitting and a horizontal pipe with a wedge mechanism attached to the hooking metal fitting.
The height of the tip of the pillar pipe is the same as the height of the upper end of the horizontal pipe with the wedge mechanism within an error range of ± 2 cm, and the first and second insertion portions are respectively urged outward by the elastic member. It has a locking mechanism with protruding pins arranged so as to face each other, and when the first and second insertion portions are completely attached to the support column pipe and the extension support column pipe, the support column pipe and the extension support column pipe The temporary scaffolding is characterized in that the protruding pin is fitted into a hook hole provided so as to face an intermediate position, and the first and second insertion portions are not pulled out from the support column pipe and the extension support column pipe. Construction. In the structure of the temporary scaffold according to claim 1, the hook hole provided in the support column pipe avoids the hook metal fitting between the upper end position and the lower end position of the hook metal fitting provided so as to face each other. The structure of the temporary scaffold, which is characterized by being formed in the same way. In the structure of the temporary scaffold according to claim 1 or 2, the strut pipe is a short auxiliary strut pipe provided with the U-shaped hook fitting and another connecting fitting having the same structure as the connecting fitting below the short auxiliary strut pipe. The structure of the temporary scaffold, which is characterized by having a lower strut pipe connected via. The connecting metal fitting used for the structure of the temporary scaffold according to any one of claims 1 to 3, wherein the protruding pins arranged so as to face each other have a slope inclined in one circumferential direction or both circumferential directions. A connecting metal fitting characterized in that the protruding pin is disengaged from the hook hole by rotating the extension support pipe or the connecting metal fitting.

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