JPH0450091B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a method of bending a surgical suture needle.

<Prior Art> As a method for bending a suture needle of this type, a technique disclosed in Japanese Patent Publication No. 18256/1987, developed by the applicant of the present patent, is known.

As shown in FIG. 2 or 3, this technique involves attaching and fixing the tip of a metal belt 1 of a certain length to a roll 4 using screws 2 or cut grooves 3, etc.
In this method, when the belt 1 is wound around the roll 4, a suture needle (needle material) is inserted between the two and wound up, thereby bending the suture needle into an arc shape.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional method, the suture needle is inserted between the belt and the roll and processed, so if this is repeated, the belt will be damaged.
The belt had to be replaced with a new one from time to time. When replacing this belt, it is necessary to stop the rotation of the roll each time, remove the screw 2, or remove the tip of the belt from the cut groove 3, and then fix it in its original state again. However, there were problems such as poor workability and uneconomical performance.

However, it is uneconomical to replace the belt each time, so recently a belt pool box 5 supported by a spring 6 has been manufactured as shown in FIG.
The belt pool 1' is stored in this belt pool 1', and the belt 1 is pulled out from this belt pool 1' and its tip is fixed to the roll 4. When the belt 1 becomes damaged, the screw 2 is removed and the damaged part is cut off. Place belt 1 with the same length as belt 1 in belt pool 1.
A method has also been developed in which a new belt 1 is pulled out, a screw hole is provided at the tip of the new belt 1, and the tip of the belt 1 is again fixed to the roll 4 with a screw 2 for use.

However, even with this new method, (a) the belt has to be removed from the roll and cut and reattached each time the belt is damaged, making it difficult to work with, and (b) the belt cannot be cut immediately before the belt is cut. , there is a disadvantage that there is a difference in the curving process of the suture needle between the new belt after cutting it off, and (c) there is a disadvantage that when pressing is performed at the same time as bending the suture needle, variations occur in the pressing thickness, and ( d) Thin and long needle made of hard material. For example, if you try to bend a needle with a thickness of 0.5 mm and a length of 30 mm into an arc of 1/2, you will have to wrap it around the roll twice, and therefore half of the tip of the needle will bend. The process was done by wrapping the remaining base half around once from the needle tip and then wrapping it around once again from the needle tip, but this was not easy to work with and it was difficult to perform continuous and accurate processing. Furthermore, in the case of eyeless needles, the hole at the proximal end of the needle is crushed during bending, so there is a problem that it is necessary to insert a pin into the hole and then remove it after processing.

The present invention relates to a completely new technology developed in view of these conventional problems.

<Means for Solving the Problem> The processing method according to the present invention involves bending the needle into an arc shape by inserting the needle between a roll and a belt that wraps around the outer periphery of the roll and winding the needle. In the method, a belt pulled out from a belt pool on one side of the roll is wound around the roll without being fixed, and if necessary, the belt is sequentially fed out from the belt pool, and the used belt is then transferred to the other side. This method of bending a suture needle is characterized in that the needle is bent while being processed in one belt pool.

<Function> As described above, in the processing method according to the present invention,
The belt is not fixed to the roll, and a new belt is fed out from the belt pool to the roll as needed, so if the belt becomes damaged, it can be replaced immediately with a new one without cutting it, and it can always be slightly removed. This eliminates the need to cut, remove, and attach the belt, and also eliminates variations in the bending process.If the needle bending process and press process are performed at the same time, the belt can be made into a new belt. It is possible to eliminate variations in thickness due to damage to the belt, and by actively utilizing the grooves that are created in the belt during the needle bending process, the protrusion can prevent slipping on the flat body of the needle and reinforce the bending strength. can be formed automatically, and even thinner and longer needles can be processed with a single bending operation.

<Example> An example of the processing method according to the present invention will be specifically explained with reference to the drawings as follows.

FIG. 1A is a simplified diagram of an apparatus showing an example for implementing the processing method of the present invention, in which a metal belt 13 is disposed between a winding roll 11 and an auxiliary roll 12.
is being passed. Reference numeral 14 denotes a needle material, which is constructed so that it can be bent by being inserted between the winding roll 11 and the metal belt 13 wound thereon. Furthermore, when the needle material 14 is bent by the winding roll 11 and the metal belt 13, if external pressure is further applied by the auxiliary roll 12, the needle material 14 can be pressed at the same time as the bending process. It is configured as follows.

The metal belt 13 is formed into a long shape, is supplied from a belt pool 15 in which unused metal belts 13 are wound, and is driven by a pulse motor, a servo motor, or a constant torque motor before being wound around the winding roll 11. The metal belt 13 passes through a tension pulley 16 and a belt moving pulley 17 to which rotational force is applied by controlling the tension pulley 16, and tension is applied to the tension pulley 16 so that the metal belt 13 moves in synchronization with the rotation of the pulley 17. , and the belt moving pulley 17 synchronizes with the winding roll 11 by changing the amount of rotation toward the winding side and the amount of rotation toward the unwinding side, that is, by changing the amount of rotation toward the winding side of the needle material. By making the amount of rotation slightly larger than the amount of rotation to the side, it is configured such that a new portion of the belt can be fed to the winding roll 11 little by little.

For example, when bending a 25 mm round needle material 14 leaving 1.5 mm at the tip, move the metal belt 13 and winding roll 11 23.5 mm toward the winding side, stop once, and then unwind the material by 24 mm. By unwinding the belt, a new belt of 0.5 mm can be supplied each time one needle material 14 is bent. Using this method,
When pressing is performed together with bending, groove marks 21 are produced as shown in FIG. 1B.

After being wound around the take-up roll 11, the metal belt 13 passes through a guide roll 18 and a tension pulley 19 and is taken up into a used belt pool 20. The tension pulley 19, together with the pulley 16, is connected to the belt 13 with the rolls 11 and 1
Add tension so that it moves in sync with 7.

In the processing method according to the present invention, unlike the conventional processing method described above, the metal belt is not fixed to a roll, but the unused metal belt 13 that has been wound around the belt pool 15 is pulled out, and the unused metal belt 13 is rolled up and rolled. Used metal belt 1 wrapped around 11
3 is wound onto a used belt pool 20 for processing, and the belt 13 is further moved by a belt moving pulley 17, and if necessary, a new metal belt 13 is sequentially paid out in required lengths and transferred to a winding roll. 11, the used metal belt 13 damaged by bending the needle material 14 can be sent to the used belt pool 20 for disposal without having to be cut each time.

In the above embodiment, the movement of the metal belt 13,
Although the belt is fed out using the belt moving pulley 17 and a motor such as a pulse motor, it is also possible to use other means, for example, by providing a box in the belt pool 15 and using a metal fitting that can fix and feed out the metal belt 13 pulled out to the opening of the box. At the same time as attaching the box, roll the box into the roll 11 using a cylinder, etc.
It is also possible to create a structure that pulls it away from it or pushes it towards it.

In addition, in the above embodiment, the used belt pool 2
0 may be pooled randomly without being wound up, or may be cut by providing a cutting blade in the pool 20. Furthermore, the metal belt 13 may of course be a belt other than metal.

<Effects of the Invention> Since the processing method according to the present invention has the above-described structure and operation, the metal belt can be bent while being wound around the roll without being fixed, and the damaged part of the metal belt can be repaired. There is no need to cut and remove the belt, or fix the cut end to the roll again, and new metal belts can be sequentially fed out and fed to the roll as needed.
In addition to extremely improving workability, it is possible to eliminate variations in bending due to damage to the metal belt, and when bending is performed at the same time as pressing, it is possible to eliminate variations in thickness due to damage to the metal belt. By actively utilizing the concave grooves created on the belt during processing, it is possible to automatically form protrusions on the flat body of the needle that can prevent slipping and reinforce bending strength. It has features such as being able to be processed with a single bending operation.

[Brief explanation of the drawing]

Fig. 1A is a simplified explanatory diagram showing an example of an apparatus for carrying out the processing method of the present invention, and Fig. 1B is an explanation of concave groove marks when pressing is performed at the same time as bending using the processing method of the present invention. 2 to 4 are simplified explanatory diagrams showing conventional examples, respectively. 1 and 13 are metal belts, 2 is a screw, 3 is a cut groove, 4 and 11 are rolls, 5, 15 and 20 are belt pools, 6 is a spring, 12 is an auxiliary roll, 1
4 is a round needle material, 16 and 19 are tension pulleys, 1
7 is a pulley for moving the belt, and 18 is a guide roll.

Claims (1)

[Claims] 1. In a processing method in which a needle is inserted between a roll and a belt that wraps around the outer circumference of the roll, the needle is bent into an arc shape by winding the needle, and the belt pool on one side of the roll is The pulled out belt is wound around the roll without being fixed, and if necessary, the belt is sequentially fed out from the belt pool, and the used belt is further processed in the belt pool on the other side while bending the needle. A suture needle bending method featuring: