JP2518675B2 - Bending equipment for shafts, etc. - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bending device for a shaft rod or the like, and more particularly to a bending device for accurately and automatically processing a shaft rod such as a suture needle. It is about.

<Prior Art> As a conventional method of bending an axial rod or the like of this type into an arc shape, a press working method using a press die, a three-roll method using three rolls, or the like is performed. Was,
The former has a defect that the die is expensive and the processed material is damaged, and the latter has a defect that the insertion end is easily damaged, and particularly the pointed processed material has a defect that the tip is bent.

The applicant of the present invention has already developed and put into practical use a technique as shown in Japanese Patent Publication No. 60-18256 in order to improve the above-mentioned conventional processing method and processing apparatus. The technique disclosed in Japanese Examined Patent Publication No. 60-18256 particularly combines a cylindrical winding roll and a belt, and inserts a shaft rod or the like between these to wind the shaft rod or the like into an arc shape. Is the way. Further, when inserting the shaft rod or the like into the belt, a flat plate-shaped stand on which the belt is placed or an auxiliary plate has been used.

<Problems to be Solved by the Invention> However, the technique described in Japanese Patent Publication No. 60-18256 is extremely effective when this is carried out by a manual method, but insufficient when carried out by an automatic method. However, there are various problems as illustrated below.

That is, the axis of the shaft that is automatically supplied onto the belt cannot be regulated in the width direction of the belt, so the direction is not fixed at all, and the shaft is processed while it is obliquely placed on the belt. There was a problem. If an attempt is made to provide a needle material supply guide to prevent this, there is a problem that the auxiliary plate and the belt on the auxiliary plate are obstructive and the guide cannot be provided properly.

The processing apparatus according to the present invention relates to a completely new technique developed in view of the above-mentioned conventional problems.

<Means for Solving the Problems> The present invention relates to a shaft rod composed of a winding roll, an auxiliary roll adjacent to the roll, and a belt passing between the both rolls and wound around a part of the winding roll. In a bending apparatus such as the above, a groove for receiving supply of the shaft rod is formed on the upper surface, and the tip has a guide formed in a shape corresponding to the shape of the outer peripheral surface of the winding roll. A shaft rod or the like characterized in that it is provided in the vicinity of the winding start portion at the time of supply and at the vicinity where the belt is wound around the winding roll so as to be retracted to a position not disturbing when discharging the processed shaft rod. It is a bending device.

<Operation> In the present invention, as described above, the auxiliary roll is provided adjacent to the winding roll, the belt is passed between them, and when the shaft is supplied, it is close to the winding start part and the processed shaft is processed. Since a guide that can retreat to a position that does not disturb when discharging is provided, it is possible to feed the shaft rod between the winding roll and the belt to the correct position while regulating the inserting direction by the guide. Can be done,
Moreover, when the shaft rod is taken out, this guide is retracted as necessary, so that this guide does not interfere with the belt or the auxiliary plate and obstructs it, and the processed shaft rod can be taken out smoothly.

<Example> An example of the processing apparatus according to the present invention will be specifically described as follows.

The processing apparatus according to the present invention was developed in view of the above-mentioned conventional drawbacks. First, the basic device of the present invention will be described with reference to FIG. 1. In the device of the present application, a winding roll 1 is adjacent to an auxiliary roll 2, and these rolls 1, 2
The belt 3 is passed between 2 and the right side of the roll of the belt 3 is extended in an appropriate direction in consideration of interference with others, and further, in the vicinity of the winding roll 1 and the belt 3, a shaft of needle material or the like is provided. A gutter-shaped guide 4 capable of sequentially supplying rods is provided so as to be slidable in the horizontal direction. The guide 4 constitutes a part of a circumference whose tip facing the winding roll 1 has a shape corresponding to the shape of the outer peripheral surface of the winding roll 1, that is, a diameter which is substantially equal to or slightly larger than the diameter of the winding roll 1. It is formed in a circular arc shape or in a linear shape having a gradient similar to the circular arc.

Therefore, in the processing method according to the present invention, the guide 4 can be provided without interfering with the auxiliary plate or the belt, and while the guide 4 regulates the direction of the shaft (not shown), It is precisely fed between the metal belt 3 and the winding roll 1, and then the shaft rod is wound around the winding roll 1 together with the belt 3 and at the same time the auxiliary roll 2
While being pressed by, it is bent in an arc shape along the outer peripheral surface of the winding roll 1, and by further rotating the winding roll 1 in the reverse direction, the shaft rod is rewound together with the belt 3, and the shaft rod after bending is discharged downward. Can be taken out. When the guide rod 4 is in the way during the discharge of the shaft rod, the guide passage 4 can be slid and retracted to form the discharge passage.

Next, referring to FIG. 2, the guide 4 has a V-shaped groove 4a in the axial direction on the upper surface thereof, and the shaft 6 inserted into the V-shaped groove 4a from the shaft inserting device 5 has a V-shaped groove 4a. It is configured so that it can be supplied while being extruded between the winding roll 1 and the belt 3 by a pressing tool 7 having substantially the same bottom cross-sectional shape. The pusher 7 is attached to the cylinder 9 via a leaf spring 8 so that the action of the leaf spring 8 allows a certain degree of flexibility in the operation of the pusher 7.

In the above embodiment, the V-shaped groove 4a is formed on the upper surface of the guide 4.
This groove 4a is inserted into this groove 4a.
Corresponding to the shape of, the grooves 4a having various sectional shapes can be formed as shown in FIGS. 3 (A) to (D), for example.

As shown in FIG. 4, when the shaft rod (needle material) 6 for an idle needle having a flat end is formed and the shaft rod 6 is supplied to the belt 3 and the winding roll 1, Figure 3 (D)
It is effective to use the groove 4a having an inverted trapezoidal sectional shape as shown in FIG.

<Effects of the Invention> As described above, in the processing apparatus according to the present invention, the guide is arranged so as to be movable along the vicinity of the winding roll and the belt wound around the winding roll. It is possible to automatically feed the shaft rod between the winding roll and the belt with the correct direction and timing at all times, which allows the shaft rod to be curved accurately in the correct direction and arc shape. ,
Moreover, it has a feature that the processing of the shaft rod can be automated and mass-produced at low cost.

[Brief description of drawings]

FIG. 1 is a simplified explanatory view of a processing apparatus of the present invention, FIG. 2 is an explanatory view of a main part thereof, FIG. 3 is a sectional view showing a shape of a groove of a guide, and FIG. 4 is an explanatory view of a shaft rod. . 1 is a winding roll, 2 is an auxiliary roll, 3 is a belt, 4
Is a guide, 4a is a guide groove, 5 is a shaft rod inserting device, 6 is a shaft rod, 7 is a pressing tool, 8 is a leaf spring, and 9 is a cylinder.

Claims (1)

(57) [Claims] 1. A bending apparatus for a shaft rod or the like, which comprises a winding roll, an auxiliary roll adjacent to the winding roll, and a belt passing between the both rolls and wound around a part of the winding roll. The upper surface has a groove for receiving the supply of the shaft rod, and the tip has a guide formed in a shape corresponding to the shape of the outer peripheral surface of the winding roll, and the guide is close to the winding start portion when supplying the shaft rod. A bending device for a shaft rod or the like, which is provided in the vicinity of where the belt is wound around a winding roll so as to be retracted to a position where it does not interfere when the shaft rod after processing is discharged.