JP4040802B2 - Coupling device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coupling device used for constructing a temporary structure or the like by joining steel pipes at right angles.
[0002]
[Prior art]
For example, temporary structures such as work scaffolds and supporters using steel pipes are constructed by connecting steel pipes at right angles together with the addition of steel pipes. For this reason, a connecting device for connecting steel pipes at right angles Is required.
[0003]
Conventionally, a general joining device used for joining steel pipes at right angles is to fix a flange member provided with a hole for joining on the outer periphery of one of the steel pipes to be joined to each other. Fix the holder member with a notch that fits the flange member thickness at the end of the steel pipe, and connect the flange member from above the holder member with the holder member fitted on the flange member. Both steel pipes are connected at right angles by driving wedges into the holes.
[0004]
[Problems to be solved by the invention]
By the way, the coupling device as described above needs to completely remove the wedge to be driven into the coupling hole at the time of disassembly from the holder member, so that the wedge is separated from the holder member, and its management becomes troublesome. The operability and workability at the time of dismantling are poor, especially at the time of dismantling, the work to lift the lower end of the wedge and the work to lift the wedge must be done with both hands. There is a problem that it is not preferable from above.
[0005]
Also, in working scaffolds and support works, it is necessary to pass a scaffold plate between horizontal members to secure the passage. At this time, as much as possible between the side of the work scaffold or support work and the side edge of the scaffold plate. In the above-described conventional coupling device, the overall shape is enlarged, and the upper end of the wedge which is wide on the holder member protrudes from the holder member. Therefore, a wide gap is generated between the side surface of the work scaffold or the support work and the side edge of the scaffold plate, which is not preferable from the viewpoint of safety.
[0006]
Accordingly, an object of the present invention is to provide a coupling device that has good operability and workability at the time of coupling and dismantling, and is compact and can reduce the occurrence of gaps between the side surfaces of the work scaffolding and support work and the side edges of the scaffolding plate. It is to provide.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the invention of claim 1 is characterized in that a flange member fixed to the outer periphery of one steel pipe of the steel pipes to be connected to each other and provided with a hole for connection, and an end of the other steel pipe. A holder member that is fixed and is provided with a notch to be externally inserted with respect to the thickness of the flange member, along the axial direction of the other steel pipe from the tip, and the tip wall can be brought into contact with the outer periphery of the one steel pipe; The holder member includes a coupling member that is inserted into the coupling hole of the flange member. The holder member is fitted around the flange member to prevent rotation about the axis of the other steel pipe. the coupling member, by inserting against holes for coupling, in the coupling device being formed so as to sandwich at the outer peripheral surface of the other hand the steel pipe a tip wall of the holder member, said coupling member, for coupling A wedge portion inserted into the flange member, and a flange-like portion that fits between the outer periphery of the flange member and the end of the other steel pipe in a bifurcated arrangement, in the middle of the side edge facing the wedge portion of the flange-like portion A configuration in which a locking step portion for the temporary placement portion provided in the lower portion of the holder member is provided is employed.
[0009]
According to a second aspect of the present invention, in the first aspect of the invention, the coupling member is in a temporary placement posture in which a locking step portion provided in the hook-like portion is locked to the temporary placement portion, and a lower end of the wedge portion is a holder member. When the notch of the holder member is externally inserted into the flange member, the hook-shaped part comes into contact with the flange member and is pushed in, and the locking step part is removed from the temporary placement part and falls. The structure is such that the wedge portion falls into the coupling hole of the flange member and the coupling is automatically generated.
[0010]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the coupling member is in a coupled state in which the wedge portion is inserted into the coupling hole of the flange member, and the lower end of the hook-shaped portion projects from the lower portion of the holder member. Thus, an operation unit for releasing the connection is adopted, and a configuration is adopted in which the connection can be released with one hand by pushing up the operation unit.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
In the first embodiment shown in FIGS. 1 to 3, the coupling device includes a flange member 1 fixed to the outer periphery of one steel pipe A (vertical column member) of steel pipes that are coupled to each other in a right angle arrangement, and the other. It consists of a combination of a holder member 2 fixed to the end of a steel pipe B (horizontal material) and a coupling member 3 that fastens the flange member 1 and the holder member 2 in the holder member 2. A rectangular metal plate having a thickness is provided with a hole 4 that is externally fitted to the steel pipe A and welded to the center, and is formed into a planar cross shape by removing the four outer peripheral portions in an arc shape. The connecting holes 5 are provided at the positions of the holes in a radial arrangement at equal intervals.
[0014]
The holder member 2 fixed to the end of the other steel pipe B by welding is bent rearward on both sides of the front wall 6 that is elongated vertically, and has a substantially semicircular side wall 7 whose rear end has the same diameter as the other steel pipe B. , 7 are bent and coupled, the rear ends of both side walls 7, 7 facing the end of the steel pipe B are welded, and the upper and lower surfaces between the side walls 7, 7 are openings through which the coupling member 3 is inserted. 8 and 8.
[0015]
The length of the holder member 2 in the front-rear direction is longer than the length in the radial direction of the portion where the coupling hole 5 of the flange member 1 is provided. A notch 9 to be externally fitted is provided along the axial direction of the other steel pipe B from the tip, and the depth of the notch 9 is set so that the tip wall 6 can be brought into contact with the outer periphery of the one steel pipe A. Is set. If the notch 9 is externally inserted into the flange member 1, the holder member 2 and the other steel pipe B are prevented from rotating around the axis of the other steel pipe B.
[0016]
The coupling member 3 includes a wedge portion 10 inserted from above into the coupling hole 5 of the flange member 1, a horizontal portion 11 provided in the middle of the wedge portion 10, and a right angle from the tip of the horizontal portion 11. Thus, the flange member 1 is formed in a forked shape with a flange-like portion 12 that fits between the ends of the other steel pipe B, the wedge portion 10 becomes narrower toward the lower end, and the front wall 6 of the holder member 2 The front edge to be in contact with the inner surface is vertical, and the rear edge in contact with the end of the coupling hole 5 is an inclined edge. In addition, the wedge part 10 may adopt a straight shape other than the lower narrow shape as illustrated.
[0017]
Pins 13 and 14 for retaining are fixed to the upper end of the wedge portion 10 and the lower end of the hook-like portion 12, and the wedge portion 10 of the coupling member 3 inserted into the holder member 2 is inserted into the coupling hole 5. Thus, the upper end of the wedge portion 10 protrudes from the upper surface of the holder member 2, and the lower end of the hook-shaped portion 12 protrudes downward from the lower surface of the holder member 2. Since the wedge portion 10 only protrudes at a part near the tip of the holder, the scaffolding plate C can be placed so as to cover the upper surface of the holder member 2 as shown by a one-dot chain line in FIG. There is.
[0018]
The coupling device according to the first embodiment of the present invention is configured as described above. In order to couple the other steel pipe B at a right angle in the middle of one steel pipe A, the coupling member 3 inserted into the holder member 2 is used. In the state where the pipe member is pulled up to the raised position and held, the notch 9 of the holder member 2 fixed to the tip of the other steel pipe B is externally inserted from the outer peripheral edge side into the portion provided with the coupling hole 5 of the flange member 1. When the front end wall 6 of the holder member 2 is brought into contact with the outer surface of one of the steel pipes A and the holder member 2 is placed on the flange member 1, the wedge portion 10 of the coupling member 3 is just above the coupling hole 5. In this state, the coupling member 3 is lowered and the wedge portion 10 is press-fitted into the coupling hole 5.
[0019]
When the wedge portion 10 is press-fitted into the coupling hole 5, the tip wall 6 of the holder member 2 is pushed toward one steel pipe A by the wedge action by the inclined edge, and the front wall 6 is pushed against the wedge portion 10 and one steel pipe A. The other steel pipe B can be coupled to the one steel pipe A in a right angle arrangement.
[0020]
In this way, the other steel pipe B can be coupled from one side to the other steel pipe A. By combining the coupling of the steel pipe B and the addition of the one steel pipe A, a work scaffold for construction and civil engineering work Support construction can be built.
[0021]
In the above coupling state, as shown in FIG. 1, the coupling member 3 has only a part of the upper portion of the wedge portion 10 protruding from the upper surface of the holder member 2. The scaffold plate C placed on the other steel pipe B as the material can be placed on the upper surface of the holder member 2, and thereby the side edge of the scaffold plate C can be brought close to the one steel pipe A. In addition, it is possible to reduce the gap generated between the side surface of the work scaffold or the support work and the side edge of the scaffold plate C, and the safety can be improved.
[0022]
Further, in order to release the coupling, the hook-like portion 12 protruding from the lower surface of the holder member 2 is hit with a hammer or the like, the wedge portion 10 is extracted from the coupling hole 5 of the flange member 1, and the holder member 2 is removed from the flange member 1. The hook-shaped portion 12 is an operation portion for releasing the connection.
[0023]
Next, the second embodiment of FIGS. 4 to 6 shows another example of the coupling member, and a protrusion 15 is provided in the middle of the side edge facing the wedge portion 10 of the hook-shaped portion 12, and the lower end thereof is provided. The engaging step portion 16 is formed, and the engaging step portion 16 is engaged with the temporary placement portion 17 provided so as to straddle the opening 8 at the lower portion of the holder member 2. Since the lower end can be held in a posture positioned above the notch 9, the coupling can be automated and the coupling can be released with one hand.
[0024]
In this example, as shown in FIG. 5, before joining the other steel pipe B to one steel pipe A, the coupling member 3 is pulled up and the latching step portion 16 is latched to the temporary placement portion 17. Then, when the notch 9 of the holder member 2 is inserted into the flange member 1, the protrusion 15 abuts on the flange member 1 in the middle of the insertion, and relative movement occurs between the holder member 2 and the coupling member 3. As a result, the locking step portion 16 is released from the temporary placement portion 17, and the coupling member 3 falls in the holder member 2. At this time, the lower end of the wedge portion 10 is just the hole for coupling the flange member 1. 5, the wedge portion 10 automatically falls into the coupling hole 5 and enters both the steel pipes A and B automatically.
[0025]
In the above coupled state, the lower part of the hook-like part 12 protrudes from the lower part of the holder member 2, and when the coupling is released, the lower end of the hook-like part 12 is struck up and the connecting member 3 is moved up to move the wedge part 10 Is extracted from the coupling hole 5, the locking step 16 is engaged with the temporary holding portion 17, and the coupling member 3 can be operated with one hand to safely disassemble the temporary scaffolding and the supporting work. Can be done efficiently.
[0026]
7 to 9 show another example of the coupling holes 5 provided in the flange member 1, and the coupling holes provided in the flange member 1 at equal intervals are shown. The two adjacent holes are formed in the long hole 5a in which the wedge portion 10 of the coupling member 3 is accommodated, and the remaining two holes are formed in the fan-shaped hole 5b spreading outward.
[0027]
Since the long hole 5a has a width in which the thickness of the wedge portion 10 is just accommodated, the other steel pipe B joined using the long hole 5a is arranged along the radial direction of the one steel pipe A. On the other hand, the other steel pipe B joined using the fan-shaped hole 5b has an angle with respect to the radial direction of the one steel pipe A because the wedge portion 10 is movable in the width direction of the fan-shaped hole 5a. Bonding is possible.
[0028]
FIG. 8 and FIG. 9 show the plane of the support construction constructed by combining the joints having such angles, and one steel pipe A arranged in four directions is joined by the other steel pipe B using the long holes 5a. By assembling a square basic frame and connecting the other steel pipe B with an angle using the fan-shaped holes 5b on the outside, the support can be arranged along an arcuate or curved structure can do.
[0029]
In addition, in the case of illustration, the coupling device has shown an example of coupling of circular steel pipes, but the square steel pipe can be coupled with the same structure, and the coupling device can be used for structures such as support works and scaffolds using the steel pipe. It can be widely used not only for construction but also for parts that require steel pipe connection.
[0030]
【The invention's effect】
As described above, according to the present invention, one of the flange members fixed to the outer periphery of the steel pipe is provided with a coupling hole, and the other end of the steel pipe is externally inserted with respect to the thickness of the flange member. A notch is provided, and the connecting member inserted into the connecting hole of the flange member in the holder member is inserted into the connecting hole so that the tip end wall of the holder member is held between the outer peripheral surface of the steel pipe. As a result, it is possible to hold the coupling member in the holder member, and the operability and workability at the time of coupling and disassembly are good, and the entire shape is compacted by housing the coupling member in the holder member. If a work scaffold or support is constructed, a scaffold plate can be placed over the holder member, creating a gap between the side of the work scaffold or support and the side edge of the scaffold plate. Less, so that it is possible to improve safety.
[0031]
In addition, a locking step for the temporary placement part provided at the lower part of the holder member is provided in the middle of the side edge of the hook-shaped part of the coupling member, so that the wedge part of the coupling member is automatically used as a coupling hole during the coupling operation. Thus, the efficiency of the joining work can be improved by automating the joining.
[0032]
In addition, since it is only necessary to lift the coupling member to release the coupling, the scaffolding and support work can be disassembled with one hand, ensuring safety during work, improving the safety of the dismantling work and providing it on the flange member. Since the connecting hole is fan-shaped, the other steel pipe can be connected to the one steel pipe at an angle, and a support and a scaffold that can cope with a curved shape can be constructed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional front view showing a coupling device according to a first embodiment. FIG. 2 is a plan view of the same. FIG. 3 is an exploded perspective view showing the first embodiment of the coupling device. Fig. 5 is a perspective view of a coupling member showing a second embodiment of the coupling device. Fig. 5 is a longitudinal front view of the coupling device in the middle of coupling showing the second embodiment of the coupling device. FIG. 7 is a plan view of a flange member showing a third embodiment of the coupling device. FIG. 8 is a plan view of the coupling state showing a third embodiment of the coupling device. [Fig. 9] An enlarged plan view of the main part of the above.
DESCRIPTION OF SYMBOLS 1 Flange member 2 Holder member 3 Coupling member 5 Coupling hole 6 Tip wall 7 Side wall 8 Opening 9 Notch 10 Wedge part 12 Cage part A One steel pipe B The other steel pipe

Claims (3)

A flange member that is fixed to the outer periphery of one of the steel pipes to be connected to each other and provided with a hole for connection, and a notch that is fixed to the end of the other steel pipe and is fitted to the thickness of the flange member. A holder member which is provided along the axial direction of the other steel pipe from the tip portion, and whose tip wall can be brought into contact with the outer periphery of the one steel pipe; and a coupling member which is inserted into the coupling hole of the flange member in the holder member The holder member is formed by inserting the notch into the flange member to prevent rotation around the axis of the other steel pipe, and the coupling member is inserted into the coupling hole, In the coupling device formed to sandwich the tip wall of the holder member with the outer peripheral surface of the one steel pipe ,
The coupling member includes a wedge portion to be inserted into the coupling hole, and a hook-like portion that is fitted between the outer periphery of the flange member and the end of the other steel pipe in a bifurcated arrangement. A coupling device, wherein a locking step portion for a temporary placement portion provided at a lower portion of a holder member is provided in the middle of a side edge facing the wedge portion .   The coupling member is in a temporary placement posture in which a locking step provided on the hook-like portion is locked to the temporary placement portion, and the lower end of the wedge portion is positioned above the notch of the holder member, and the holder member is cut. When the notch is externally inserted into the flange member, the flange-shaped portion comes into contact with the flange member and is pushed in, the locking step portion is removed from the temporary placement portion and dropped, and the wedge portion falls into the coupling hole of the flange member. 2. A coupling device according to claim 1, wherein the coupling occurs automatically.   The coupling member is in a coupled state in which the wedge portion is inserted into the coupling hole of the flange member, and the lower end of the hook-shaped portion protrudes from the lower part of the holder member to become a coupling release operation unit, and by pushing up the manipulation unit The coupling device according to claim 1 or 2, wherein the coupling can be released with one hand.

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