JPH048925Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a curling stone in which a handle is screwed into any one of bottomed holes for attaching the handle provided on the upper and lower surfaces of the stone body.

[Conventional technology]

For example, the curling stone described in Japanese Utility Model Application Publication No. 58-126867 has a long bolt inserted from below into a relatively long through hole drilled in the center of the stone body, and a nut hanging from the handle is screwed into the stone. However, the thickness of the stone body is generally 15 to 20 cm.
It is difficult to accurately form a long through hole in the center, and the through hole may reduce the strength of the stone body.Furthermore, it is necessary to insert a long bolt into the through hole from below and attach a nut to the tip. In the handle installation structure, which is done by screwing together the
There is a drawback that the fixation of the handle itself tends to become unstable.

In this regard, the curling stone described in Japanese Utility Model Application Publication No. 57-173767 has a structure in which bottomed holes are provided on the upper and lower surfaces of the stone body, and a handle is screwed into each hole, so the above-mentioned curling stone is Shortcomings are avoided.

[The problem that the idea aims to solve]

However, the bottomed hole has the trouble of having to carve a female thread on the inner surface, and in addition, the bolt at the end of the handle is screwed into something located on the top surface of the stone body, so it can be separated from the handle. The body cover is also fixed to the top surface of the stone body, so the handle tends to become unstable, and the bottomed hole located on the bottom surface of the stone body will be left open. However, it has the disadvantage that it gets clogged with ice shavings, dust, etc.

The present invention has been proposed for the purpose of eliminating the various drawbacks mentioned above.

[Means to solve the problem]

The configuration adopted by the present invention for the above purpose is as follows.

Each bottomed hole 4 provided on the upper and lower surfaces of the stone body 1,
Bolts 6 and 8 are housed and erected by gluing their heads with adhesive 7 within 5.

A bolt 6 or 8 in one of the bottomed holes 4 or 5 is screwed and tightened with a nut 10 hanging down from the lower surface of a mounting 9' integrally formed with the handle 9, thereby tightening the handle 9. Attach.

By removably screwing and tightening the cap 11 onto the bolt 8 or 6 in the other bottomed hole 5 or 4, that bottomed hole 5 or 4 is closed.

〔Example〕

The illustrated embodiment will be described below.

1 is a disc-shaped stone body (diameter 274mm, thickness
150mm), and the central circular parts 2 and 3 (diameter
128mm) is slightly concave.

The stone body 1 is formed by injecting a synthetic resin mixed with aggregate as described below into a predetermined mold using a vibrator, and removing the mold after hardening.

The above synthetic resin and aggregate composition is for adults with a weight of 20
Kg curling stones are as follows.

Synthetic resin (polyester) 4Kg Calcium carbonate (particle size 1-2mm) 7.04Kg Same as above (particle size less than 1mm) 1.6Kg Feldspar powder 1.6Kg Barite 4.16Kg Fritz 0.8Kg Iron powder 0.8Kg After removing the stone body 1 from the mold, In addition to polishing the surface of the surrounding central strip 1' that collides with other stone bodies during competitions, circular bottomed holes 4 and 5 (diameter 20 mm, depth 26 mm) are installed at the center of the central circular parts 2 and 3. are drilled with a drill.

Numeral 6 is a bolt with a hexagonal head, which is erected with the head facing downward in the bottomed hole 4, and filled with adhesive 7 to a point slightly above the head. The tip is located just inside the opening of the bottomed hole 4.

A bolt 8 has the same shape as the bolt 6, and is fixed in the bottomed hole 5 in the same manner as the bolt 6.

Reference numeral 9 denotes a handle made of synthetic resin, which is in the shape of a substantially horizontal L-shaped round bar, and has a disk-shaped attachment portion 9' integrally molded at its lower end.

The mounting portion 9' has a slightly larger diameter than the central circular portion 2, and its lower surface is molded into a shape that closely fits the central circular portion 2 and its outer peripheral portion on the upper surface of the stone body 1, and the mounting portion 9' has a slightly larger diameter than the central circular portion 2. The lower end is located a little closer to the outer periphery than the center of the mounting portion 9'.

Reference numeral 10 denotes a nut that projects vertically from the lower surface of the mounting portion 9', and has a cylindrical shape with one end closed, and has a female thread formed on its inner peripheral surface to be screwed into the bolts 6 and 8. It is fixed at the center of the portion 9' by insert molding.

The handle 9 is attached by inserting a nut 10 into the bottomed hole 4, screwing it onto the bolt 6, and tightening it so that the lower surface of the mounting portion 9' comes into close contact with the upper surface of the stone body 1.

Reference numeral 11 closes the bottomed hole 5 with a circular cap screwed onto the bolt 8.

When the lower surface of the stone main body 1 becomes worn due to sliding etc., the handle 9 is replaced with the lower surface using the nut 10 and the bolt 8, and the cap 1
By replacing 1 with bolt 6, it is possible to slide on an unused upper surface.

In addition, in the above example, the case where the stone body was molded from synthetic resin mixed with aggregate at a predetermined ratio was explained, but the type and mixing ratio of the aggregate and synthetic resin are not limited to this, and the fiber The stone body may be formed of reinforced concrete or natural stone.

[Effect of idea]

As is clear from the above description, the present invention has the following effects.

By gluing the heads into the bottomed holes provided on the upper and lower surfaces of the stone body, the bolts are housed and raised, and the nuts of the handle are screwed onto the bolts and tightened, so it is effective. There is no need to carve a female thread in the bottom hole.

Since the handle is integrally molded with the mounting part and the nut is vertically disposed on the mounting part, the handle is firmly fixed by the threaded tightening.

Since the bottomed hole on the side where the handle is not attached, that is, the bottomed hole on the bottom side, is closed with a cap, it does not get clogged with ice shavings, dust, etc. There is no problem when using it upside down.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a central longitudinal sectional view and FIG. 2 being a perspective view. 1...Stone body, 4, 5...Bottomed hole, 6,
8... Bolt, 7... Adhesive, 9... Handle,
9'...Mounting part, 10...Nut, 11...Cap.

Claims (1)

[Scope of utility model registration request] In a curling stone in which bottomed holes for attaching a handle are provided on the upper and lower surfaces of the stone body, and the handle is screwed into any one of the bottomed holes, in each bottomed hole on the upper and lower surfaces, By gluing the head with adhesive, the bolt is housed and raised, and by screwing and tightening the bolt in one of the bottomed holes with a nut that hangs down from the bottom of the mounting part that is integrally molded with the handle. A curling stone characterized in that the handle is attached and the cap is removably screwed and tightened onto a bolt in the other bottomed hole, thereby closing the bottomed hole.