JP2554887Y2 - Stone retaining press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stone fixing press device for fixing a jewel by caulking a stopper of a ring base.

[0002]

2. Description of the Related Art Rings such as diamonds and rubies are completed by placing a gemstone on a ring base made of, for example, platinum and fixing the jewelry by caulking a fastener (claw) of the ring base with a punch. Goods.

Conventionally, in this stone fixing work, a ring base is firmly fixed to a fixture, and as shown in FIG. 6, a jewel 3 is placed on the fixed ring base 1 and an arrow A in FIG. As shown in the figure, the stopper 5 is punched little by little inward with a punch and caulked.

[0004]

However, when the fastener is manually struck by a punch with a punch, and particularly when the fastener 5 forms an annular rib as shown in FIG. The circumference had to be crimped inward on average, requiring considerable skill and poor workability.

[0005] When the stopper 5 forms an annular rib, it is swaged with a punch while shifting it little by little.
There has been a problem that minute irregularities remain on the surface of the fastener, resulting in poor appearance.

On the other hand, it is conceivable that the jewel is fixed by mechanically squeezing the stopper of the ring base using a normal press or the like. However, even with the same type of ring, the size and cut shape of the jewel can be considered. Were slightly different from each other, and could not perform the appropriate stone-fixing work according to the size and cut shape of each gem.

That is, it is necessary to perform such a stone-fixing operation while caulking the stopper of the ring base little by little to gradually adjust to the shape of the jewel, and has a constant stroke and a strong impact force. If pressed at once, there is a risk of damaging or breaking the jewelry.

Therefore, an object of the present invention is to easily and quickly perform a stone-fixing operation without requiring skill, and to gradually narrow down stoppers while gradually adjusting to the shape of each jewel. Another object of the present invention is to provide a stone-clamping press device that can fix a jewel so as to have a beautiful appearance.

[0009]

In order to achieve the above object, a stone fixing press device according to the present invention comprises: a rotating shaft rotated by a handle; a plate cam mounted on the rotating shaft;
A slide shaft urged in the axial direction by elastic means, one end of which is elastically abutted against the plate cam and whose axial length is changeable, and which is detachably attached to the other end of the slide shaft. And a ring holder for holding a ring at a position facing the press plate.

[0010] In a preferred embodiment of the present invention,
The slide shaft is composed of a tube portion slidably held in the device frame in the axial direction, and a screw portion screwed to the tube portion and extending in the same axial direction.By turning the screw portion, The length can be adjusted.

[0011]

With the stone pressing device of the present invention, when the handle is rotated with the ring holder on which the jewel is placed in the ring holder, the slide shaft is pushed in the axial direction by the plate cam mounted on the rotating shaft. Then, a press plate provided at one end of the slide shaft comes into contact with and presses the stopper of the ring base, and the stopper is crimped inward to fix the jewel placed on the ring base.

In this case, the stroke can be changed by changing the axial length of the slide shaft, so that the stopper is caulked while gradually increasing the pressing force of the press plate to conform to the shape of each jewel. be able to. Further, since the slide shaft and the press plate are driven by the cam plate, the press plate is not pressed with a strong impact force. Therefore, cracking and damage of the jewel can be prevented.

In addition, since the press plate descending by the rotation of the handle abuts the stopper of the ring base on average and presses the entire periphery of the stopper with uniform force, the periphery of the jewel is fixed with uniform strength. In addition to the above, fine irregularities are not formed on the contour of the stopper, so that the appearance can be improved.

Further, since the press plate is detachable from the slide shaft, an appropriate press plate can be selected according to the size and shape of the jewel and the fastener.

According to a preferred aspect of the present invention, a slide shaft is constituted by a tube portion slidably held in the frame in the axial direction and a screw portion screwed to the tube portion and extending in the same axial direction. The entire length of the slide shaft can be adjusted by turning the screw. Therefore, the stroke of the press plate can be easily changed only by turning the screw portion.

[0016]

1 to 5 show an embodiment of a stone-clamping press device according to the present invention.

As shown in FIG. 1, two columns 13, 13 are erected on a base 11 in parallel at a predetermined interval, and a cross member 15 is connected to an intermediate portion of these columns 13, 13. The frame forms an H-shape as a whole.

A rotary shaft 17 is inserted through the upper portions of the columns 13 and 13 in parallel with the cross member 15 and is rotatably supported. A plate cam 19 is attached to the center of the rotating shaft 17, and a handle 21 is attached to one end of the rotating shaft 17. Therefore, by rotating the handle 21, the rotating shaft 17 and the plate cam 19 rotate in the same direction.

The plate cam 19 has a shape such that the radius with respect to the rotating shaft 17 gradually increases along the circumferential direction, and a step portion 23 is formed between a portion having a minimum radius and a portion having a maximum radius. After one rotation, it returns to the position of the minimum radius.

Below the plate cam 19, a slide shaft 25 is slidably inserted into and supported by the cross member 15. As shown in FIG. 2, the slide shaft 25 includes a bolt 27 and a slide tube 31, and the bolt 27 is screwed into the slide tube 31. A stroke adjusting plate 29 is fixed near the head of the bolt 27. By turning the stroke adjusting plate 29, the length of the bolt 27 can be changed by changing the screwing amount.

The slide tube 31 is inserted into a hole (not shown) formed in the horizontal member 15, and a guide plate 40 that is in contact with the slide tube 31 is fixed to the upper surface of the horizontal member 15. A notch plane 39 is formed in a part of the upper outer periphery of the slide tube 31, and the guide plate 40 abuts the notch plane 39 to prevent the slide tube 31 from rotating. Note that the slide shaft can be prevented from rotating by forming the slide shaft into a prismatic shape or by arranging two slide shafts in parallel.

As shown in FIG. 5, a washer 33 is disposed on the outer periphery of the slide shaft 25, and the washer 33 is set on a guide plate 40. And the slide shaft 25
A compression coil spring 35 is interposed between the washer 33 on the outer periphery of the slider and the stroke adjusting plate 29, and urges the slide shaft 25 upward through the stroke adjusting plate 29. For this reason, the head of the bolt 27 of the slide shaft 25
It is in elastic contact with the outer peripheral surface of the cam plate 19.

Referring again to FIG. 1, an annular holder 41 is attached to the lower end of the slide tube 31 of the slide shaft 25, and a set screw 43 is attached to a predetermined position on the outer peripheral surface of the holder 41. I have. As shown in FIG. 3, a shaft 47 for mounting is fixedly mounted on the press plate 45. The shaft 47 is inserted into the holder 41 and tightened with the set screw 43, whereby the press plate 45 is Are removably attached to the lower end of the slide shaft 25.

On the lower surface of the press plate 45, there is formed a recess 49 made in accordance with the shape of a jewel and a fastener for a ring base to be applied. That is, the concave portion 49 has a space into which the jewel enters, and a tapered inner peripheral wall that abuts against and clamps the stopper, and when the press plate 45 is pressed, only the stopper is the concave portion 49. It is shaped so as to be pressed against the inner peripheral wall and to prevent damage without touching the jewel. Therefore, when the type of the ring 61 is changed, the set screw 43 is loosened, the press plate 45 is removed, and the press plate 45 is replaced with another press plate 45 suitable for the type of the ring.

A ring holder 51 is provided below the press plate 45.
Is fixedly installed on the base 11. In this embodiment, the ring holder 51 is, as shown in FIG.
1 is composed of a plate 53 to be bolted on, a block 55 fixed on the plate 53, and a support shaft 57 projecting forward from the block 55.

The ring base 61 is mounted on the outside of the support shaft 57 in a state where the jewel is placed in the stopper in advance, and the ring base 61 is disposed with the part on which the jewel is placed facing upward. In order to accurately position the ring base 61, the support shaft 57
A protrusion 59 is provided on the upper part of. That is, since the inner periphery of the portion where the jewel is fixed is usually dented, when the ring base 61 is mounted on the outer side of the support shaft 57, the above-mentioned protrusion 59 is formed on the inner periphery of the ring base 61. The ring base 61 can be accurately positioned by being fitted to the recessed portion. At this time, the portion of the ring base 61 to which the jewel is fixed is accurately positioned directly below the concave portion 49 of the press plate 45.

Next, a method of fixing a jewel to a ring base by using the stone fixing press device will be described.

First, a press plate 45 having a concave portion 49 suitable for the type of the ring base 61 to be applied, the size and shape of the jewel is selected, and the shaft 47 of the press plate 45 is moved to the slide shaft 25.
And is fixed by screws 43. As described above, since the press plate 45 can be appropriately selected according to the shape of the ring base 61 and the jewel, even if the type of the ring is changed, the same press device can be used.

Next, the jewel is placed in advance in the stopper of the ring holder 61, and the ring holder 61 is attached to the support shaft 57 of the ring holder 51.
The ring base 61 is positioned by fitting the protrusion 59 of the support shaft 57 into a concave portion on the inner circumference of the ring base 61.

In this state, the handle 21 is moved to an arrow A in FIG.
When rotated in the direction, the rotating shaft 17 and the plate cam 19 rotate in the arrow B direction. When the plate cam 19 rotates in the direction of arrow B, the radius of the plate cam 19 gradually increases, so that the head of the bolt 27 that is urged by the compression coil spring 35 and is in contact with the plate cam 19 is subjected to spring force. In contrast, the slide shaft 25 is pushed down in the figure to push down the entire slide shaft 25.

As a result, the press plate 45 attached to the lower end of the slide shaft 25 descends, presses the stopper of the ring base 61 held by the holder 51 and crimps it inward.
When the handle 21 is rotated once, the head of the bolt 27 rises through the step portion 23 of the plate cam 19 and the slide shaft 25
Returns to its original position. That is, the press plate 45 descends once each time the handle 21 is rotated once, and the press operation is performed.

Therefore, in order to perform the stone-retaining work safely and reliably without damaging or breaking the jewel, 1
The stone fixing work on one ring base 61 is not performed by one descent of the press plate 45, but is performed by gradually lowering the stoppers in a plurality of descents. That is,
First, the amount of screwing of the bolt 27 into the slide tube 31 is increased, the entire length of the slide shaft 25 is shortened, and the descending stroke of the press plate 45 is shortened. Each time the handle is rotated once to caulk the fastener with the press plate 45, the stroke adjusting plate 29 is turned to reduce the amount of screwing of the bolt 27 into the slide tube 31, and the entire length of the slide shaft 25 is reduced. By gradually increasing the length, the lowering stroke of the press plate 45 is lengthened.

In this way, by repeatedly performing several pressing operations on one ring base 61 while gradually increasing the downward stroke of the press plate 45, the stoppers of the ring base 61 can be individually It gradually crimps inward while adjusting to the shape of the jewel, and finally the jewel can be firmly fixed. Therefore, the jewel can be easily and reliably fixed without being damaged or broken. In addition, by using the press plate 45, the entirety of the fastener is pressed evenly by the press plate 45, so that a beautiful appearance is obtained without causing fine irregularities on the outer periphery of the fastener.

[0034]

[Effects of the Invention] As described above, according to the press device for setting stones according to the present invention, the ring base on which the jewel is placed is set in the ring holder, and the turning operation of the handle is performed to mechanically set stones. Can be performed, so that anyone can easily and easily perform the stone fixing work without requiring any skill.

Further, since the press plate is lowered via the plate cam and the slide shaft, a strong impact force is prevented from being applied when the press plate is pressed. Further, by gradually increasing the length of the slide shaft and gradually increasing the descending stroke of the press plate, the pressing operation is performed a plurality of times on one ring base, so that the individual fasteners can be used as individual jewels. As it can be caulked gradually while adapting to the shape of, without damaging or breaking the jewel,
It can be fixed securely and securely.

Furthermore, even if the type of ring stand or jewelry is changed, the press plate is detachable, so that it can be easily replaced with a press plate suitable for each. It is possible to carry out the stone fixing work on the ring.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a stone-clamping press device of the present invention.

FIG. 2 is an exploded perspective view of a slide shaft used in the device shown in FIG.

FIG. 3 is a perspective view showing a press plate used in the apparatus shown in FIG.

FIG. 4 is a perspective view showing a ring holder used in the device shown in FIG. 1;

FIG. 5 is a partially enlarged perspective view showing a main part of the device shown in FIG.

FIG. 6 is an explanatory view showing an example of a stopper for a ring base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Base 13 Support 15 Cross member 17 Rotating shaft 19 Plate cam 21 Handle 25 Slide shaft 27 Bolt 29 Holding plate 31 Slide tube 35 Compression coil spring 45 Press plate 49 Depression 51 Ring holder 57 Support shaft 61 Ring base

Claims (2)

(57) [Scope of request for utility model registration] 1. A rotating shaft that is rotated by a handle, a plate cam mounted on the rotating shaft, and an axially urged elastic member, one end of which is elastically brought into contact with the plate cam. A slide shaft whose axis length can be changed, a press plate detachably attached to the other end of the slide shaft,
A ring holder for holding a ring at a position facing the press plate; 2. The screw shaft comprises: a tube portion slidably held in an apparatus frame in an axial direction; and a screw portion screwed to the tube portion and extending in the same axial direction. The stone-clamping press device according to claim 1, wherein the length can be adjusted by turning.