Water-injection rack base for mast

A water injection rack base for a mast is formed of two semi-bases connected together by hinges, at the top surfaces of the two semi-bases being provided 1-2 water injection holes, on the joint face of the two semi-bases and on the central position being provided semi-cylindrical concaves, thereby forming holes on the top surface for inserting a mast when the two semi-bases are pulled open. This invention is of foldable-type, when in use, it can be easily pulled open, without need of being connected by bolts. The water injection hole is concealed, thereby preventing dusts and litters from entering into the bases, and making this invention novel in appearance. This invention has water discharge holes with easy water discharge, thus reducing labour intensity for workers.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to members of a rack, specifically a water-injection rack base for a mast.

2. Description of the Prior Art

A water-injection rack comprises a base, a stay bar and a marker. The stay bar is inserted into a hole of the base, and the marker is connected to the stay bar. In order to keep the rack stable, the rack base needs a weight. Since the base is hollow, the cavity of the base needs to be injected with water. Due to its large volume, the water injected rack base for a mast is generally composed of four ¼ shells, which are independent from each other and can be joined together. On the ¼ shells are provided water injection holes and bracket holes. When in use each time, the ¼ shells need to be connected by bolts, thus bringing about an inconvenience to some extent.

SUMMARY OF THE INVENTION

The object of this invention is to provide a foldable water injected rack base for a mast with convenient use.

To achieve the above object, the base of this invention is formed of two semi-bases hinged together by hinges and having cavities, at the top surfaces of the two semi-bases being provided 1-2 water injection holes, on the joint face of the two semi-bases and on the central position being provided semi-cylindrical concaves, thereby forming holes on the top surface for inserting a mast when the two semi-bases are pulled open.

The above hinge is composed of two leaves and a spindle hinging the two leaves, the two leaves being connected to the bottom surfaces of the two semi-bases respectively, and the two semi-bases being able to rotate with respect to each other through hinges when their bottom surfaces are hinged together.

All the outer corners of the two semi-bases are recessed inward, and on the recesses are provided slabs, and on the slabs are provided bracket holes.

On said semi-bases each are provided water discharge holes.

The water discharge holes of each semi-base are located under the slabs at corners, and at the ports of the water discharge holes are provided covers.

On the top surfaces of the two semi-bases each are provided a protrusion. When the two bases are pulled open, the protrusions are connected on the top surface and around the mast hole is formed a low lying on which the water injection hole is located.

On the bottom surfaces of the two semi-bases each are provided a protrusion. When the two bases are pulled open, the protrusions are connected on the bottom surface and around the mast hole is formed a low lying on which a blind hole is provided for positioning lock plates.

On the top surfaces of the above semi-bases are provided two water injection holes, and on the bottom surfaces thereof are provided two blind holes for positioning lock plates.

The utility model has the following beneficial effects:

1. This invention is of foldable-type, when in use, it can be easily pulled open, without need of being connected by bolts, which is easy in use, convenient in packaging, transportation and storage.

2. On the top surfaces of the two semi-bases each are provided a protrusion. When the two bases are pulled open, the protrusions are connected on the top surface and around the mast hole is formed a low lying on which the water discharge hole is located. When in use, this invention can be covered with lock plates at the low lying to conceal the water injection holes, thereby either preventing dusts and litters from entering into the bases, or making this invention novel in appearance.

3. This invention has water discharge holes with easy water discharge, thus reducing labour intensity for workers in water discharge.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Examples

Examples shown inFIGS. 1–5are composed of two semi-bases1each having a cavity1-5connected by hinge3, and the hinge3comprises two leaves3-1and axle3-2connecting the two leaves, the two leaves3-1each being connected to the bottom surface of the two semi-bases1, the two semi-bases1being able to rotate with respect to each other (seeFIG. 5).

On the joint face of the two semi-bases and on the central position are provided semi-cylindrical concaves, thereby forming holes1-2on the top surface for inserting a mast when the two semi-bases are pulled open. All the outer corners of the two semi-bases1are recessed inward, and on the recesses are provided slabs2, and on the slabs2are provided bracket holes2-1. Water discharge holes are disposed on the two semi-bases and located under the slabs2at corners, and at the ports of the water discharge holes are provided covers4.

On the top surfaces of the two semi-bases1each are provided a protrusion1-3. When the two bases1are pulled open, the protrusions1-3are connected on the top surface and around the mast hole1-2is formed a low lying1-4, and on the low lying1-4at the top surface of each semi-base1are provided two water injection holes1-1.

On the bottom surfaces of the two semi-bases1each are provided a protrusion1-6. When the two bases are pulled open, the protrusions are connected on the bottom surface and around the mast hole is formed a low lying1-7on which a blind hole1-8is provided for positioning lock plates.

Examples of Application

FIG. 6shows examples of application. When the two bases1are pulled open, the base1is injected with water through the water injection hole1-1. Lock plates5are disposed on the low lying1-4of the top surface of the two semi-bases and on the low lying1-7of the bottom surface thereof, on the bottom surface of the upper lock plate5is provided a central protrusion5-1corresponding to the mast hole1-2and a peripheral protrusion5-2corresponding to the water injection hole1-1. The structure of the lower lock plate is the same as the upper lock plate, and on its top surface is provided a peripheral protrusion corresponding to the blind hole1-8for positioning the lock plate. The upper and lower lock plates are covered on the low lying of the corresponding top surface and bottom surface, and the protrusions are inserted in corresponding holes. In the upper and lower lock plates and mast hole1-2is inserted a hollow bolt8in which the mast6is inserted. Four brackets7are inserted into the bracket holes2-1of the slabs2respectively, and the nut of the hollow bolt8is screwed fast to lock the mast6. The upper lock plate5covers the water injection hole1-1. After use, the cover4of the water discharge hole is opened, and the water in the base1is discharged through the water discharge hole.