JPH043120Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connecting tool for connecting handrail rods of scaffolding metal fittings for manholes.

[Conventional technology]

Conventionally, a leg integrally provided with a short vertical handrail rod was used as a metal fitting, as disclosed in Utility Application filed in 1983 by the applicant of the present application.
−166772 (Utility Model Publication No. 1983-80830), Utility Model Application No. 1983
Some of them are described in specifications such as No.-115689 (Japanese Utility Model Publication No. 62-26453).

As shown in FIG. 6, this scaffolding metal fitting A with a vertical handrail rod is formed in a U-shape with leg portions B extending from both ends of a foothold portion C. Vertical handrail rods D extending in the vertical direction are fixed to both ends of the footrest C, which corresponds to the base of the leg B. This scaffolding metal fitting A is fixed to the inner wall E of the manhole in multiple stages in the same way as normal scaffolding metal fittings, and the lower end of the vertical handrail rod D on the upper level and the upper end of the vertical handrail rod D on the lower level are connected to the connecting tool F. This eliminates the gap between the vertical handrail rods D and prevents inconveniences such as entanglement of clothes when workers go up and down inside the manhole.

As shown in FIG. 7, the connecting tool F has a structure divided into an upper member a and a lower member b that fit into the upper vertical handrail rod D-1 and the lower vertical handrail rod D-2, respectively. It's summery. Then, the bolt e is screwed into the screw hole c provided at the end of the upper vertical handrail rod D-1 through the blind hole d provided at the bottom of the lower member b. As a result, upper member a and lower member b
Connect with. At this time, by forming the connection part of the upper and lower members a and b into a flexible bellows structure, or by drilling the blind hole d at an eccentric position, the upper vertical handrail rod may be slightly shifted in the horizontal direction. D-1 and the lower vertical handrail rod D-2 can be connected. After inserting the lower vertical handrail rod D-2 into the inside of the lower member b, the tightening ring f is slid down and fitted into the groove formed on the outer peripheral surface of the lower member b. As a result, the lower vertical handrail rod D-2 is connected to the upper vertical handrail rod D-1 via the connecting device F.

In this way, in the conventional connecting device F shown in FIGS. 6 and 7, the conventional long-axis handrail rod is integrated into the scaffolding fitting A, which is equipped with the short-axis vertical handrail rod D. It is effective in providing the same function as scaffolding metal fittings.

[Problem that the invention attempts to solve]

However, as described above, the conventional connecting tool has a problem in that the connecting work of the vertical handrail rod D requires a lot of effort. Further, when the amount of eccentricity between the upper vertical handrail rod D-1 and the lower vertical handrail rod D-2 is large, there is also the problem that it becomes impossible to connect them. As a result, the advantage of the scaffold fitting A with vertical handrail rods is also lost.

Therefore, the present invention was devised to solve these problems, and even if the upper and lower handrail rods are considerably eccentric when installing a manhole, it is possible to use scaffolding fittings with vertical handrail rods. The purpose is to provide a connecting tool that can be connected.

[Means to solve the problem]

In order to achieve this purpose, the connecting tool for the scaffolding metal fittings with handrail rods of the present invention is a connecting tool for connecting the upper and lower vertical handrail rods of the scaffolding metal fittings attached to the inner wall of the manhole in the form of a ladder. A cylindrical part having an insertion hole into which the lower end of the vertical handrail rod is inserted, and an enlarged part that covers the upper end of the lower vertical handrail rod are integrally formed.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.

FIG. 1 is a perspective view showing the connecting tool of this embodiment. Further, FIG. 2 is a plan view of the connecting tool, FIG. 3 is a front view thereof, and FIG. 4 is a bottom view thereof.

The connecting tool 1 is made, for example, by integrally molding synthetic resin. At the top of the connecting tool 1,
A cylindrical portion 3 having an insertion hole 2 is formed. The lower end of the upper vertical handrail rod D-1 shown in FIG. 7 is inserted into this insertion hole 2. In addition, the cylindrical part 3
Several guide grooves 5 are provided in the vertical direction on the inner circumferential surface of the vertical handrail rod D-1 for engagement with protrusions (not shown) provided on the vertical handrail rod D-1. Furthermore, when the upper vertical handrail rod D-1 is inserted into the insertion hole 2,
Insert hole 2 to prevent vertical handrail rod D-1 from moving.
It is preferable that the inner diameter of the vertical handrail rod D-1 substantially match the outer shape of the vertical handrail rod D-1.

The lower part of the cylindrical part 3 is continuous with the enlarged part 4 in the shape of an open umbrella. In other words, when the connecting tool 1 is viewed from the side, the cylindrical part 3 is placed on the enlarged part 4 in the form of a hemisphere. It's summery. An intermediate bottom 6 is formed in the inner boundary area between the cylindrical part 3 and the enlarged part 4, with which the lower end of the vertical handrail rod D-1 inserted into the insertion hole 2 comes into contact. The intermediate bottom 6 is provided with a bolt hole 7 for inserting a bolt in order to fix the connecting tool 1 to the lower end of the vertical handrail rod D-1.

The inside of the enlarged portion 4 is hollow, and as shown in the bottom view of FIG. 4, ribs 8 in a lattice shape are provided. This rib 8 is located slightly above the lower end of the enlarged portion 4 and forms a lattice-like flat surface.

Next, using this connecting tool 1, the work of connecting the upper vertical handrail rod D-1 and the lower vertical handrail rod D-2 will be explained with reference to FIG. 5 showing the state after installation. do.

Prior to attaching the scaffolding fittings to the inner wall of the manhole, a bolt (not shown) is inserted from below into the bolt hole 7 drilled in the intermediate bottom 6, as shown in FIG. And the upper vertical handrail rod D-
Scaffolding fittings with vertical handrail rods to which connecting tools 1 are fixed at the lower ends of 1 are prepared.

Vertical handrail rods D-1, D-2, D-3 provided on both sides of each scaffolding metal body in this way...Scaffolding metal fittings with vertical handrail rods A-1, each with a connecting tool 1 attached to the lower end thereof, A-2, A-3... are attached to the manhole inner wall E in sequence from the lower stage to the upper stage. In other words, the vertical handrail rod D of the lower scaffolding metal fitting A-3
The lattice-like plane of the connecting tool 1 attached to the lower end of the vertical handrail rod D-2 of the upper scaffold fitting A-2 is placed on the upper end of -3. At this time, since the lattice-like plane formed by the lower end of the rib 8 is located slightly above the lower end of the enlarged part 4, the lower vertical handrail lever D-
3 is covered by the enlarged part 4 of the articulation 1 attached to the lower end of the upper vertical handrail rod D-2.
In this way, each stage of scaffolding metal fittings A-1, A-
2, A-3... vertical handrail rods D-1, D-2,
A scaffold is constructed in which D-3... are connected by the connecting tool 1.

In the above example, the scaffolding fittings A-1, A-2, A-3... with vertical handrail rods are stacked from the bottom to the top, but in contrast, the vertical handrails are stacked from the top to the bottom. Scaffolding fittings with rods A-1, A-
2, A-3... can also be attached to the manhole inner wall E. In this case, the upper scaffolding metal fittings A-
1, A-2... The lower scaffolding metal fittings A-
2, A-3... vertical handrail rod D-2, D-3...
...Attach the scaffolding metal fittings while touching the top edge.

As described above, the connecting tool 1 of the present invention is easier to install than the connecting tool F described in FIGS. 6 and 7. Further, even if the eccentricity of the upper and lower vertical handrail rods is large, the enlarged portion 4 can absorb the eccentricity and connect the vertical handrail rods. Moreover, since the connecting tool 1 itself has a structure reinforced with ribs 8, it can be fully used as a part of a vertical handrail rod.

[Effect of idea]

As explained above, since the connecting tool of the present invention has a simple structure, the connecting work can be performed more easily than in the past. In addition, since it has a cylindrical part and an enlarged part, even if the vertical handrail rods on the upper and lower levels are significantly eccentric, the amount of eccentricity can be absorbed and the vertical handrail rods on the upper and lower levels can be easily connected. . Furthermore, since the connecting tool has a bulge due to the enlarged portion, it also functions as a non-slip hand grip, making it easier for people to ascend and descend within the manhole.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of a connecting device according to an embodiment of the present invention, FIG. 2 is a plan view of the connecting device, FIG. 3 is a front view, FIG. 4 is a bottom view, and FIG.
The figure shows a scaffolding fitting with vertical handrail rods constructed on the inner wall of a manhole using the connecting tool. On the other hand,
FIGS. 6 and 7 show a state in which scaffolding metal fittings are connected using a conventional connecting tool. 1... Connecting tool, 2... Insertion hole, 3... Cylindrical part,
4... Enlarged part, 5... Guide groove, 6... Intermediate bottom,
7... Bolt hole, 8... Rib, A-1, A-2,
A-3...Scaffolding metal fittings, D-1, D-2, D-3...
...Vertical handrail rod, E...Inner wall of manhole.

Claims (1)

[Scope of utility model registration request] A connecting device for connecting upper and lower vertical handrail rods of a scaffolding metal fitting installed in a ladder-like manner on the inner wall of a manhole includes a cylindrical portion having an insertion hole into which the lower end of the upper vertical handrail rod is inserted; A connecting tool for a scaffolding metal fitting with a handrail rod, characterized in that an enlarged part covering the upper end of a vertical handrail rod is integrally formed.