JPS5932396B2 - How to handle iron plates - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for linking a steel plate.When transporting or laying a steel plate, wire rope slings are generally used at one or two locations on the steel plate. This is done by creating a hole or cutout in the hole, and hanging a wire rope wrapped around the hole on a crane hook to lift and lower the steel plate in a vertical or horizontal position. Handling with this wire rope sling, especially when lifting and lowering a rope in a horizontal position, requires skill and effort due to the marked curvature of the iron plate, and the wire rope may be damaged by the sharp edges of the hanging holes or notches. There were drawbacks such as the risk of breakage.

In addition, hanging is carried out by drilling round hanging holes in the iron plate and hooking the hooks directly into the hanging holes to lift and lower the rope. The diameter of the hole is relatively large because it is necessary to unhook the hook, and this has the disadvantage that there is a high risk that the hook will come off due to impact during handling of the iron plate.

The present invention eliminates the various drawbacks of the above-mentioned conventional method for linking paved iron plates, allows the simple operation of removing the hook directly from the hanging hole, and moreover, eliminates the need for impact during the linking process. The purpose is to provide a safe and efficient method for handling iron plates without the risk of hooks coming off, and the purpose is to provide a standard hook hook of a class suitable for the weight of the iron plates to be laid. An elliptical output hole with a short axis approximately equal to the inner diameter of the part and a long axis approximately twice the inner diameter is placed so that the long axis of the output hole is on the long side of the iron plate. In addition, a hole is formed so as to be located in the center of the laying iron plate in the direction of the presenting force, and the above-mentioned standard type hook is inserted into the hanging hole, and the laying iron plate is lifted and lowered through a lifting device. By inserting the corresponding standard hook directly into the hanging hole of the above-mentioned location and shape, wire rope can be conveniently used for slings that are at risk of breakage. Without,
Moreover, the special correlation between the corresponding hanging holes and the hooks enables safe and efficient hanging without the risk of the hooks coming off during handling.

EMBODIMENT OF THE INVENTION Below, the handling method of the laying iron plate of this invention is demonstrated in detail based on drawing.

FIG. 1 is a front view showing a hanging hole in a paving iron plate and a hook corresponding to the hanging hole in the method of the present invention, and FIG. 2 is a side view of FIG. 1.

1 is a hook, 2 is an iron plate, and 3 is a hanging hole drilled in the iron plate 2.

In the case of the method of the present invention, several standard hooks are available depending on the weight of the iron plate to be laid (if several types of iron plates with approximate weights are actually used at the work site, hooks with the largest weight among them) The inner diameter 00 dimension of the hook part in (1) is d, and the dimensions of the elliptical hanging hole 3 of the paving iron plate 2 and Determine the installation location.

That is, as shown in Fig. 2, the length of the short axis of the hanging hole 3 is 5f-d, the length b of the long axis of the hanging hole is tkidX2, and this elliptical hanging hole 3 is Drill the holes so that the distance (C) from the long side edge 4 of the long axis paving iron plate 2 is C kid.

As a specific example, if four types of iron plates of two sizes and thickness are used at the site as shown in the table above, a standard hook with the maximum weight of these iron plates should be used. 802 and 9 appropriate designation 3
Adopts T on standard type hook.

The length d of the inner diameter (c) of the hook of this standard type 3Ton hook
Therefore, in this case, the hanging hole 3. The length of the minor axis (S) and the length of the major axis are respectively S (S) and 50 (LOOmrn). It will be 75mm.

(The height of the hook part of the above name 3 T on hook h = 75m
, Height of the part above the center of the inner diameter of the hook h''' = 30 m
m, and the width b of the hook opening is 43 mm.) Next, when lifting the iron plate 2, as shown in Fig. 2, (with respect to the iron plate 2 in the flat state) , the axis of the hook 1 is made substantially parallel to the long axis of the hanging hole 3, and the hook 1 is
Insert the hook into the hanging hole 3 with the opening of the hook facing downward (indicated by the dotted line), and insert the shaft of the hook 1 into the hanging hole while inserting the inner wall edge of the hanging hole 3 into the opening of the hook. Rotate the long side edge 4 of the old iron plate 2 adjacent to 3 by 90° to the outside (indicated by the arrow)
As a result, the hook 1 and the output hole 3 are engaged as shown in FIGS. 1 and 2.

Subsequently, when the crane is hoisted up, the steel plate 2 rises from its short side, gradually becomes vertical, and assumes an easy-to-move safe posture in which its long side remains horizontal.

It is moved and transported to a predetermined installation location in this safe posture.

In the present invention, an elliptical hanging hole having a short diameter approximately equal to the inner diameter of the hook portion and a long axis approximately twice the inner diameter is provided so that the long axis of the hanging hole is The reeds were drilled at intervals of approximately 1% of the inner diameter of the shift hook from the long edge of the iron plate, and were located at the center of the iron plate in the longitudinal direction. , the relationship between the hook 1 and the iron plate 2 closely matches as shown by the solid lines in Figures 1 and 2.
Even if the iron plate is violently rocked back and forth in a direction perpendicular to the surface, it will not rotate in the direction of removing the clamp, and even if the iron plate is pushed up from below, the long edge of the iron plate will not be able to hold up. The lower edge of the long axis will not collide with the hook and come off the hook, and even if the iron plate 2 swings from side to side in the direction parallel to the surface, the position relative to the hook will rotate 90 degrees, and the dotted line in Figure 2 It can be said that there is almost no possibility of the hook 1 becoming detached from the hanging hole 3 shown in the figure, and therefore there is no danger of the hook 1 coming off from the hanging hole 3 during work, which guarantees the safety of the work. It is.

In addition, in the method of handling the iron plate of the present invention, in order to facilitate the insertion of the hook 1 into the lifting hole 3 when lifting the iron plate 2, in carrying out the present invention, the iron plate is 2 is stored as a multi-layered type, as shown in FIG. Seed seeds in layers in a staggered manner (but aligned in the length direction) and leave a small space below the hanging hole 3 to accommodate one hook.

When the iron plate 2 reaches a predetermined position, it begins to be lowered, and the descent is temporarily stopped just before the iron plate 2 lands, and the opening of the hook of the hook 1 faces downward as shown in Fig. 4. The laying iron plate 2 is positioned so as to be tilted in the direction and gradually landed on the ground, and the laying iron plate 2 is laid flat as shown by the dotted line in Fig. 4 to complete the laying of the iron laying plate 2.

After the installation is completed, the paving iron plate 2 can also be easily removed by rotating the hook 1 by 90° so that its axis is approximately parallel to the long axis of the lifting hole 3 in the opposite direction to when the lifting was started. .

Even if the hook 1 tries to continue descending even after landing on the iron plate 20 during this suspension, in the case of the present invention, the hook 1 does not have any degree of freedom of rotation due to the relationship with the suspension hole 3, and therefore the hook There is no danger that the iron plate 1 will come off the iron plate 2, and the safety of the work is fully guaranteed.

As explained above, the method of handling a steel plate according to the present invention involves directly engaging hooks in hanging holes drilled in the steel plate, without using wire ropes for slings that are at risk of breakage. This completely achieves the intended purpose of carrying out safe handling, especially in a highly efficient manner and without the risk of the hook coming off during handling.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the hanging hole of the paving iron plate and the hook corresponding to the hanging hole in the method of the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is a diagram showing the hanging hole in the paving iron plate in the method of the present invention. FIG. 4 is a front view showing an example of storing seed seeds in layers on iron plates, and FIG. 4 is an explanatory diagram of the operation of suspending and lowering the iron plates. A brief explanation of the drawings below: 1: Hook, 2: Iron plate, 3:
Hanging rod L4: Edge of long side of iron plate 2, D: Inner diameter of hook 1 of hook.

Claims (1)

[Scope of Claims] 1. A short diameter approximately equal to the inner diameter of the hook of a standard type hook of a class suitable for the weight of the iron plate to be laid, and a long diameter approximately twice the inner diameter. A large elliptical suspension hole is drilled so that the long axis of the suspension hole is located on the long side of the iron plate and in the center of the longitudinal direction of the iron plate. A method for linking iron plates, which is characterized by inserting a mold hook and lifting and lowering the iron plate through a lifting device. 2. Place the axis of the hook parallel to the upper long axis of the hanging hole of the laid iron plate placed horizontally, insert the hook into the hanging hole with the tip facing downward, and align the axis of the hook with the length of the laid iron plate close to the hanging hole. After rotating 90 degrees to the outside of the side edge, the steel plate is raised using a crane lifting device, etc., and while holding the long side horizontally, it is lifted and transported to a predetermined location. 2. A method for linking a steel plate according to claim 1, characterized in that the steel plate is placed flat in a predetermined position by a lifting operation that is the reverse procedure of the above-mentioned lifting operation. 3. A patent claim characterized in that seed seeds are stored in a staggered manner in a plurality of laid iron plates so that the hanging holes drilled in each plate are sequentially and alternately located on opposite sides and in an exposed state. A method for linking iron plates as described in item 1 of the scope.