JPS6350056Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Technical field This invention is a method for making two molds for making a core (so-called core holder) to make a hollow part of a casting, by firmly adhering or separating them, or by other means. The present invention relates to a mold attachment/detachment handle that allows molds to be brought into close contact with each other to be brought into close contact with each other and separated from each other with a simple structure.

(B) Background technology Conventionally, for example, in order to make a core, for example, in order to make a wooden mold or a metal mold that is split into two parts, it is difficult to attach and detach using bolts and nuts. A dovetail formed in a tapered shape in the horizontal direction is provided to protrude from the front and rear or left and right sides of the upper and lower molds adjacent to each other, and a block with a dovetail groove formed in the dovetail is inserted from the side into the dovetail and hammered. A method is used to tighten and seal the material by hitting it with a hammer or the like.

However, since this method uses a hammer to attach and detach the blocks, the operation is not only troublesome and dangerous, but also the ants and blocks, as well as both the upper and lower molds, are susceptible to damage, and sometimes the inside of the core holder may be damaged. There was also the risk of damaging the core itself, which is manufactured in the same way.

(c) Disclosure of the invention In view of the problems of the conventional attachment/detachment work of the core holder, the present invention provides a handle that allows both upper and lower types of attachment/detachment work to be carried out safely and easily. Moreover, the upper and lower molds are not only firmly attached by rotating the handle, but also can be easily separated, and can be used for a variety of purposes in addition to attaching and detaching the core holder. The present invention provides a handle for attaching and detaching the mold.

That is, in the present invention, a shaft is protruded from one of the upper and lower sides close to the abutting surfaces of the upper and lower molds that should be in close contact with each other, and the handle body is rotatably attached to the shaft, and the handle body is rotatably attached to the shaft, and A small-diameter pin is protruded and fixed to the handle body, and the handle body is composed of a handle portion and a rotating plate portion that can be rotated on the other side surface, and one end of the rotating plate portion has a beak shape that is largely bent outward. The inner side thereof is formed into an inclined surface that gradually approaches the above-mentioned axis, and the intermediate part connected to this is an abdomen that projects outward with a gap between it and the above-mentioned beak-shaped inner side. is formed, and its outer edge is formed to gradually move away from the axis toward the other end, and a stopper portion is formed protruding from the other end of the abdomen, and the pin is rotated by the rotation of the rotating plate portion. This invention relates to a mold attachment/detachment handle, characterized in that it is provided at a position in contact with the middle part of the inner side of the beak-shaped part in the gap and in contact with the middle part of the abdomen when the plate part is rotated in a reverse direction.

Hereinafter, an example in which the mold attachment/detachment handle of the present invention is attached to a core holder will be explained with reference to the drawings.

(d) Example A and B are made of metal (or wood) that constitutes the core.
A shaft 1 is protruded and fixed on the side surface of one of the molds (lower mold A in the figure) near the abutting surface with the other mold B, and a handle body C is attached to the shaft 1. It is attached so that it can rotate freely.

This handle body C has a handle part 2 formed at a position slightly away from the side surface of the lower mold A so that fingers can be inserted freely, and a handle part 2 formed on the opposite side of the handle part 2 with the shaft 1 in between. Close to the side, both upper and lower types A and B
The turning plate part 3 is formed in a curved shape that can turn on the side surface of the upper die B when the two are butted together, and is shaped like an elephant raising its trunk.

One end of this rotating plate part 3 is formed to protrude outward into a beak-shaped part 3a that is largely bent, and its inner side 3a' gradually approaches the above-mentioned shaft 1, and is connected to the beak-shaped part 3a. The middle part of the beak-shaped part has a gap 4 between it and the inner side 3a' of the beak-like part, and an abdomen 3b is formed which projects outward in a substantially semicircular shape, and the outer side of the abdomen 3b extends toward the other end. A stopper portion 3c is formed so as to protrude from the other end that gradually moves away from the shaft 1 and is connected to the abdomen 3b.

Reference numeral 5 designates a small-diameter pin protrudingly fixed to the side surface of the upper die B close to the abutting surface with the lower die A. The pin 5 loosely fits into the entrance of the gap 4 of the rotating plate portion 3; By pivoting the portion 3, it comes into contact with the intermediate portion of the inner side 3a' of the beak-shaped portion, and when the rotating plate portion 3 is pivoted in the opposite direction, it now comes into contact with the intermediate portion of the abdomen 3b.

When the upper and lower molds A and B are to be firmly attached, firstly, the upper and lower molds A and B are brought into close contact with each other. When the handle body C is rotated so as to enter inside, the pin 5 comes into contact with the intermediate portion of the inner side 3a' of the beak-shaped portion of the plate portion 3. Since the inner side 3a' is gently inclined toward the axis 1 of the main body C as described above, by further rotating the main body C, the pin 5 is pressed to the inner side 3a'. As a result, both the upper and lower molds A,
B are firmly pressed together.

In addition, when separating the molds A and B that are in close contact with each other, the handle body C
Rotate in the opposite direction and attach the inner side 3 of the beak
When the pin 5, which is in pressure contact with a', is released from the gap 4 and the rotation is continued, the pin 5 comes into contact with the intermediate portion of the abdomen 3b of the rotating plate portion 3. (Figure 3 A).

Therefore, when the main body C is further rotated, the outer edge of the abdomen 3b is gently inclined so as to gradually move away from the axis 1 toward the tip as described above, so the pin 5 slides on the outer edge of the abdomen 3b. As a result, the upper mold B floats up and away from the lower mold A, and when the pin 5 is brought into contact with the stopper part 3c formed protruding from the end of the abdomen 3b, the upper mold B is lifted. It is held floating at a predetermined distance from the lower mold A (FIG. 3B).

In order to levitate the upper mold B while holding it horizontally, it goes without saying that the handle body C should be attached to the side surface of the lower mold A at a plurality of locations so that the handle body C can be rotated at the same time.

Then, the upper mold B floating as described above can be scooped up by a forklift, or can be easily carried away to another location by a crane with a chain attached to it.

In addition, especially when the pin 5 is in pressure contact with the inner side 3a' of the beak-shaped part in order to firmly attach both the upper and lower molds A and B, the handle body C must not be easily turned in the opposite direction and released from the pressure contact state. Therefore, in order to rotate the handle body C, it is better to have a certain amount of weight. For example, when attaching the body C to the shaft 1, tighten the bolt 6 on the body C to prevent it from coming off the shaft 1, or An O-ring 7 is fitted onto the outer periphery of the shaft 1 so as to be strongly pressed against the inner periphery of the rotational center of the main body C which is in contact with the outer periphery of the shaft 1.

Above we have explained both the upper and lower types of core holes.
The attachment/detachment handle of the present invention is not limited to this, but can be used for items where two items (especially the upper part) that are to be firmly attached to each other cannot be easily lifted by hand, and a forklift, crane, etc. is used. It is possible that

(e) Effects of the invention The handle for attaching and removing molds of the present invention is constructed as described above, and can firmly press both upper and lower molds, such as the upper and lower molds of a core holder that should be in close contact with each other, simply by rotating the handle. By rotating the mold in the opposite direction, the upper mold is not only released from crimping, but also lifted off the lower mold without requiring much force, making it easy to move it to another location using a forklift or crane. It has the advantages of being movable, having a simple structure, being easy to manufacture, and being usable for a variety of purposes.

[Brief explanation of the drawing]

FIG. 1 is a front view of a mold attachment/detachment handle according to the present invention, FIG. 2 is a longitudinal cross-sectional view thereof, and FIGS. 3A to 3B are action explanatory views. Description of symbols, A...Lower mold, B...Upper mold, C...Handle body, 1...Shaft, 2...Handle part, 3...Swivel plate part, 3a...Beak-shaped part, 3a'... inner side,
3b... Abdomen, 3c... Stopper part, 4... Gap, 5... Pin, 6... Bolt, 7... O-ring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A shaft is protruded from one of the upper and lower sides close to the abutting surfaces of the upper and lower molds that should be in close contact with each other, and the handle body is rotatably attached to the shaft. , a small diameter pin is protruded and fixed on the same side of the upper and lower sides,
The handle body is composed of a handle portion and a rotating plate portion that can be rotated on the other side surface, and one end of the rotating plate portion is formed to protrude outward in the shape of a beak, and the inner side of the rotating plate portion is formed to protrude outwardly in the shape of a beak. The intermediate part connected to this is formed with an abdomen that protrudes outward with a gap between it and the beak-shaped inner side, and the outer side extends to the other end. The pin is formed so as to gradually move away from the axis, and a stopper part is formed protrudingly from the other end of the abdomen, and the pin comes into contact with the middle part of the inner side of the beak-shaped part in the gap by turning the turning plate part. A handle for attaching and detaching a mold, wherein the handle is provided at a position where the plate portion comes into contact with the intermediate portion of the abdomen when the plate portion rotates in a reverse direction. (2) The mold attachment/detachment handle according to claim 1, wherein an O-ring is fitted into the outer peripheral surface of the shaft to make the rotation of the handle body heavier.