JPH0416585Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lifting and locking device for concrete covers of public ditches, etc.

[Conventional technology]

Recently, progress has been made in constructing common ditches to accommodate power supply lines and cables for information services that occupy the airspace above cities.

Common ditches generally have a structure in which a concrete box culvert with a U-shaped cross section that is open upward is buried under the sidewalk, and a block-shaped concrete cover is laid over the open top. .

By the way, the concrete cover on this common ditch is placed to allow walking on the box culvert buried under the sidewalk and to prevent dirt and rainwater from entering the box culvert. However, it must be possible to remove it for work inside the box culvert.

The present applicant has already proposed a lifting device for facilitating the handling of concrete covers in public ditches in Utility Model Application No. 60-178883.
86391 etc., we have proposed species.

[Problem that the invention attempts to solve]

However, the proposed conventional concrete lid
Although it is equipped with a lifting device, it is simply placed on top of the box culvert and is not fixed, which is not only inappropriate for crime prevention, but also causes the lid to lift up and come off in the event of a short circuit inside the culvert. It is expected that. Therefore, there has been a demand for the concrete lid to be provided with a locking mechanism as well as a lifting mechanism.

The present invention was developed in consideration of the above-mentioned circumstances, and is capable of lifting heavy concrete lids as well as locking the concrete lids. The aim is to provide a device that has both functions.

[Means for solving problems]

The structure of the present invention will be explained with reference to the drawings corresponding to the embodiments.The present invention includes fixing a seat plate 7 with a push bolt 10 screwed to the lower part of a cylindrical case 6; A hook body 13 is provided at the lower end of the case 6 and is swingable around a horizontal axis by the vertical movement of the push bolt 10, and a hanging tool 21 is removably screwed into the upper part of the case 6. The suspension plate 15 is fixed to form a lifting and stopper C, and this lifting and stopper C is attached to the corner of the concrete cover plate A.
A box culvert B on which the concrete lid A is placed is provided with a locking body 22 for locking the hook body 13.

[Effect]

The lifting and stopper C in this invention is case 6
If the inner push bolt 10 is rotated and moved downward, the first
As shown by the solid line in the figure, the hook body 13 rotates and its engaging piece 12 projects outward and enters the locking body 22, thereby locking the concrete lid A to the box culvert B. Further, when the push bolt 10 is moved upward, the hook body 13 is rotated and hung down as shown by the chain line in FIG. 1, and the engagement with the locking body 22 is released. In that state, as shown in Figure 4,
The hanging tool 21 is screwed onto the hanging seat plate 15, and the hanging ring 20 is
You can use it to lift it.

〔Example〕

Hereinafter, embodiments of the device of the present invention will be described with reference to the drawings.

In the figure, A is a concrete lid placed on box culvert B, which is a dish-shaped box made of iron plate formed by raising side plates on the outer periphery of a wavy bottom plate 2 having long grooves a and a in the transverse direction of box culvert B. A concrete layer 3 is filled in the lower half of the body 1, and a surface material layer 5 is laid in the upper half with a leveling sand layer 4 interposed therebetween.

C is at least the opposite corner of the box 1,
The lower half is embedded in the concrete layer 2, the lower end protrudes into the groove a of the wavy bottom plate 2, and the upper end is almost flush with the upper edge of the side plate of the box body 1. The lower part of the case 6 is fixed and erected to the wavy bottom plate 2 by welding or the like.

A seat plate 7 having a screw hole 8 in the center is fixed to the lower part of the cylindrical case 6, and a push bolt 10 having a square hole 9 for rotation at the upper end is mounted in the screw hole 8. They are screwed together. Mounting plates 11, 11 are protruded from the lower end of the case 6, and the central part of a hook body 13, which has an engaging piece 12 protruding from the lower end of the mounting plates 11, 11, is swung by a horizontal shaft 14. It is pivoted freely. In addition, at the top of case 6,
A screw hole 16 with a larger diameter than the head of the push bolt 10
A hanging seat plate 15 is fixed thereto, and further,
The upper end of the case 6 has hanging holes 17, 17 for rotation.
A cover plate 18 having a diameter is screwed thereto.

As shown in FIG. 3, the suspension plate 15 is provided with a threaded rod 19 at its lower part that is screwed into the screw hole 16 of the suspension plate 15, and a hanging tool 21 provided with a hanging ring 20 at its upper end. However, it is now possible to screw it on.

On the other hand, on the upper surface of the box culvert B, there is a U-shaped locking body 22 that engages the engagement piece 12 of the lifting/stopping tool C, corresponding to the hook body 13 of the lifting/stopping tool C. (not shown) with mounting bolts 23, 23.

The present invention is constructed as described above, and when placing the concrete lid A, as shown in FIG. 4, the lid plate 18 of the case 6 is removed and the push bolt 10 is rotated. Position the hook body 13 above.
After putting it in a hanging state, a hanging tool 21 is screwed onto the hanging seat plate 15, and the hanging ring 20 is used to lift it up and lower it to a predetermined position. Then, as shown in FIG. 1, the hanging tool 21 is removed, the push bolt 10 is rotated and screwed downward, and the hook body 13 is rotated to attach the engagement piece 12 to the U-shaped locking body 22. Push it inside and lock it. Then, the cover plate 18 is screwed onto the case 6. To remove the concrete cover A, as mentioned earlier, remove the cover plate 18 and remove the push bolt 1.
It is sufficient to hang the hook body 13 by a zero screw movement, attach the hanging tool 21, and then lift and move it.

[Effect of idea]

As explained above, in the device of the present invention, a seat plate with a push bolt screwed thereto is fixed to the lower part of a cylindrical case, and a horizontal shaft is attached to the lower end of the case by vertical movement of the push bolt. A hanging hook body that can swing freely around the case is provided, and a hanging seat plate to which a hanging tool is removably screwed is fixed to the upper part of the case to form a lifting and stopper. The fixture is provided at the corner of the concrete cover plate with its lower part protruding, and on the other hand, a locking body for hooking the hook body is provided on the box culvert on which the concrete cover is placed. The concrete cover placed on the box culvert can be latched onto the locking body fixed on the box culvert by simply rotating and lowering the push bolt in the case of the lifting and fastening device buried therein. The concrete cover can be fixed securely and firmly, and when removing or moving the concrete cover, rotate the push bolt and move it up to disengage the locking body and release the suspension seat inside the case. This can be easily done by screwing the hanging tool onto the board. In addition, the lifting and stopper is installed in the concrete lid and does not protrude above the sidewalk surface, so it does not become an obstacle to traffic, etc.
It has many advantages, such as a simple structure and low manufacturing cost.

[Brief explanation of the drawing]

The drawing shows one embodiment of the device of the present invention.
Figure 1 is a longitudinal cross-sectional view showing the main parts, Figure 2 is a side view of the lifting/stopping tool, Figure 3 is a front view of the lifting tool, and Figure 4 is the main part showing the state when lifting a concrete lid. The longitudinal sectional view and FIG. 5 are partially cutaway slope views showing the concrete cover and box culvert separated. A... Concrete lid, B... Box culvert, C... Lifting and stopper, 1... Dish-shaped box body, 2
... Bottom plate, 3 ... Concrete layer, 4 ... Leveling sand layer, 5 ... Surface material layer, 6 ... Case, 7 ... Seat plate, 10 ... Push bolt, 12 ... Engagement piece, 13 ...
...Hanging hook body, 15...Hanging seat plate, 18...Lid plate, 21
...hanging tool, a...groove.

Claims (1)

[Scope of utility model registration request] A seat plate to which a push bolt is screwed is fixed to the lower part of the cylindrical case, and a hook body is provided at the lower end of the case to be swingable around a horizontal axis by the vertical movement of the push bolt, In addition, a lifting seat plate to which the hanging tool is removably screwed is fixed to the upper part of the case to form a lifting and stopper, and this lifting and stopper is attached to the corner of the concrete cover plate. A device for lifting and locking a concrete lid in a communal ditch or the like, characterized in that a lower part of the lid projects and a locking body for locking the hook body is provided on a box culvert on which the concrete lid is placed.