JP2001071077A - Sheath forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheath forming device which is small in number of parts, simple in assembly process, and capable of manufacturing a sheath having no hard portions such as a connection pipes. SOLUTION: A sheath forming device 1 comprises a rolling device 2 comprising a rolling part 8 slidable on a guide bar 7 and a core with a wire 13 passing through the rolling part 8 wound therearound in a coil shape, a sheath winding machine 3 comprising a forming table head 19 which forms a coil by winding the wire 13 around the core, and is connected to the rolling part 8 and movable on a guide bar 17, a feed device to feed the wire 13 of the specified amount to the core, and a threaded bar 18 with the forming table head 19 screwed therewith so that the forming table head 19 is movable on the guide bar 17, and a product receiving roll device 4 to receive the sheath fed by a feed roller 38 within one of receiving parts to hold the core after forming the sheath by winding the wire 13 around the core in a coil shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath forming apparatus capable of forming a coil by deforming a cross-sectional shape of a desired portion.

[0002]

2. Description of the Related Art In recent years, a small-diameter insertion portion is inserted into a body cavity to observe a built-in body cavity device or to perform various treatments using a treatment tool inserted into a treatment tool channel as necessary. Medical endoscopes that can be used are widely used. Also, in the industrial field, industrial endoscopes capable of observing the inside of boilers, turbines, engines, chemical plants, and the like are widely used. Treatment tools as accessory parts of the endoscope include biopsy forceps and grasping forceps. In this treatment tool, an operation wire pivotally attached to the treatment section is inserted into a sheath formed by a close-contact coil having a treatment section attached to a distal end portion, and the treatment section is pulled and loosened to operate the treatment section. Can be operated.

[0003]

However, the sheath formed by the close-wound coil may be used, for example, in the case where it is desired to reduce the wire diameter of the wire so as to improve the bendability in the vicinity of the treatment portion and to form a soft sheath, or a sniper. If it is desired to increase the wire diameter of the desired portion to improve the properties and to use a hard sheath, connect a sheath formed of a thin wire to a sheath formed of a thick wire with a connection pipe. However, according to this method, the number of parts is large, the number of assembling steps such as filing for finishing is increased, and further, there is a disadvantage that a hard portion is formed in the sheath due to the presence of the connecting pipe.

The present invention has been made in view of the above points, and has a small number of parts, can simplify the assembling process,
It is another object of the present invention to provide a sheath forming apparatus capable of manufacturing a sheath having no rigid portion such as a connection pipe.

[0005]

In order to achieve the above object, a sheath forming apparatus according to the present invention comprises a rolling section capable of deforming a wire into a predetermined cross-sectional shape and slidable on a guide rod, and receiving sections at both ends. A core metal that is rotatably gripped and a wire material that has been deformed or undeformed through the rolling portion is wound on a coil, and a wire material is wound around the core metal to form a coil, and is connected to the rolling portion. A forming table head movable on a guide bar, a feeding device for feeding a wire rod to the core bar at a constant rate, and a forming table provided in parallel with the guide bar so that the forming table head can move on the guide bar. After forming a sheath by winding a wire around the core bar in a coil shape and forming a sheath around the core bar, a sheath delivered by a feed roller in one of the receiving portions for gripping the core bar. Kicking those constructed from a product receiving roller device.

[Operation] The operation according to this configuration is such that the cross-sectional shape of the wire continuously supplied to the sheath winding device is partially deformed by a rolling device, and this is integrated by winding the wire around a cored bar, thereby hardening the wire. A sheath having a partially different diameter is manufactured.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 7 relate to a first embodiment of the present invention. FIG. 1 is a plan view of a sheath forming apparatus, and FIG. 2 is a view taken in the direction of arrows AA 'in FIG. FIG. 3 is a sectional view taken along the line BB 'of FIG.
FIG. 4 is an explanatory view of the sheath winding, FIG. 5 is a view taken in the direction of the line CC ′ in FIG. 4, and FIG.
6 (a) is a view as seen in the direction of the line DD 'in FIG. 5, FIG. 6 (b) is a view as seen in the direction of the arrow EE' in FIG. 5, and FIG. 7 is an explanatory view of the forming die.

1 to 3, a sheath forming apparatus 1 includes a rolling device 2, a sheath winding machine 3 provided side by side with the rolling device 2, and a product receiver provided in a longitudinal direction of the sheath winding machine 3. And a roll device 4.

In the rolling device 2, a rolling section 8 is slidably provided on two guide rods 7 juxtaposed on a base 6 on the guide rods 7. The rolling unit 8 is provided with an electric motor 12 that drives the rolling roller 9 via a speed reducer 11 and a gear system (not shown) in parallel with the longitudinal direction of the guide rod 7. Rolling roller 9 driven by this electric motor 12
Are provided, for example, in pairs of two, so that the wires 13 supplied at right angles to the longitudinal direction of the guide rods 7 can be sequentially narrowed by air pressure and pressed.
The rotation speed of the electric motor 12 can be adjusted by a speed adjusting slider (not shown) so that it can be changed according to the wire diameter of the wire 13.

[0010] The three sets of rolling rollers 9 are driven by the same gear system (not shown), and the rotation speed is the same for all three sets. Further, the upper roller 14 of each set of rolling rollers 9 is not shown. Wire rod 1 by air cylinder
3 is rolled under pressure. The rolling force can be changed for each rolling roller 9 by changing the air pressure to an air cylinder (not shown).

[0011] The sheath winding machine 3 provided adjacent to the rolling device 2 is provided with a guide rod 7 of the rolling device 2 on a gantry 16.
The two guide rods 17 are arranged side by side in parallel with the longitudinal direction, and a threaded rod 18 is provided between the two guide rods 17 in parallel with the guide rods 17. On this guide rod 17, a forming head table 19 is provided with a female screw portion 20 screwed to the screw rod 18.
Are slidably provided on the guide rod 17. The shaping table head 19 is connected to the rolling section 8 so that the screw rod 18 rotates to move the shaping table head 19 and the rolling section 8. On this molding table head 19, the wire 1
The core metal 21 is provided in parallel with the longitudinal direction of the guide rod 17, and one end of the core metal 21 is gripped by a collet chuck shaft device 22 as a receiving portion, and the other end of the core metal 21. Is held by the core receiving spindle 23 as a receiving portion.

The collet chuck shaft device 22 is provided at an end on the gantry 16, and rotates the gripped core metal 21 via a V-belt 26 by an electric motor 24 provided below the gantry 16, and The wire 13 is wound around the gold 21 in a coil shape. The output shaft of the electric motor 24 is also connected to the input end of a continuously variable reduction gear 27 so that the screw rod 18 is driven via a V-belt 28 after being decelerated. The moving speed of the molding table head 19 can be adjusted by adjusting the number of revolutions by the continuously variable transmission 27.
The winding pitch can be adjusted.

In FIG. 7, the molding table head 1
The lower part 9 is provided with a female screw part 20 to which the screw rod 18 is screwed.
, A pressing die 31 for pressing the wire 13 wound on the core metal 21 toward the collet chuck, and a pressing die 32 for supporting the forming force of the forming die 29. The pressing die 32 is urged by a spring 33 so as to move along with the deformation of the wire rod 13 due to rolling, and the spring 33 can be adjusted by an adjusting bolt 34 to adjust the urging force.

An electric motor 36 is provided below the mount 16 of the sheath winding machine 3 and opposite to the electric motor 24 so that the screw rod 18 can be reversed through a V-belt 37. After the winding of the wire 13 around the core metal 21 is completed, the forming table head 19 is moved to the collet chuck side, and at the same time, the formed wire 13 is inserted through a hollow shaft (not shown) in the collet chuck shaft device 22. The feed roller 38 feeds the wire 13 to the product receiving roll device 4.

The product receiving roll device 4 is provided with a plurality of receiving rollers 41... For receiving the coil-shaped wire 13 sent out from the sheath winding machine 3 above the mount 39. On the end face of the gantry 39 on the third side, a nipper 42 capable of cutting the fed wire 13 at a predetermined position is provided, and can be driven by air pressure.

A plurality of receiving stands 43 are provided between the plurality of feed rollers 41 by a plurality of arms 46 attached to a rod 44 provided in parallel with the feeding direction of the wire 13. By driving a rotary actuator 47 connected to one end of the rod 44, the rod 44 is rotated, and the formed wire 13 can be discharged. The rotary actuator 47 is pneumatically driven, and the operating speed of the arm 46 can be adjusted by adjusting the air throttle valve.

On the side of the frame 16 of the sheath winding machine 3 in the longitudinal direction, limit switches 49, 51, 52, 53 which can be operated by a striker 48 provided on the side of the molding table head 9 are provided on the collet chuck side. From the metal core receiving spindle side to a predetermined position. Among these, the limit switch 49 is provided closest to the collet chuck side, and plays a role of starting the automatic operation and closing the collet chuck side device 22. Further, the limit switch 51 adjacent to the limit switch 49 is operated only when the striker 48 hits from the cored bar receiving spindle side. The cutting position by the nipper 42 provided on the end face of the product receiving roll device 4 can be set. Further, the limit switch 52 provided on the core receiving spindle side opens the collet chuck shaft device 22 after the winding molding is completed, so that the winding length can be adjusted. . A limit switch 53 adjacent to the limit switch 52 and closest to the metal core receiving spindle 23 is designed to stop the machine by the limit switch 53 in an emergency if the stop is not stopped by the limit switch 52 for some reason. Has become.

In addition to the above, on the rolling device 2 side, limit switches 56, 57, 58 operated by the striker 54 directed to the side of the rolling section 8 are provided on the side of the gantry 6. First, when the limit switch 56 provided on the collet chuck side does not stop at the position of the limit switch 49 provided on the sheath winding machine 3, the machine is emergency stopped. A limit switch 57 provided adjacent to the limit switch 56 is for lowering the upper roller 14 of the rolling rollers 9 to rotate the electric motor 12, and the striker 54 hits from the collet chuck side. It works only when it is. Further, a limit switch 58 provided adjacent to the limit switch 57 and provided on the side of the core receiving spindle 23 raises the upper roller 14 of the rolling roller 9, and drives the electric motor 12 for driving the rolling roller 9.
, And operates only when the striker 54 hits from the collet chuck side.

The operation of the above-described sheath forming apparatus will be described. In FIG. 4, the wire 13
Is introduced into the rolling roller 9 from the wire stand 59 via the back tensioner 61, the guide roller 62, the disconnection detector 63, the guide roller 64, and the guide 66 as a feeder.

When the forming table head 19 starts moving and the limit switch 57 is operated, the introduced wire rod 13 is narrowed by the upper roller 14 which has been lowered, and the electric motor 12
The rolling roller 9 rotates in the direction of the arrow as shown in FIG.
Is rolled by a predetermined length.
The three sets of rolling rollers 9 can individually adjust the rolling force by adjusting the air pressure, and by sequentially increasing the rolling force, as shown in FIG.
6A can be transformed into a cross-sectional shape having a flat portion at the top and bottom as shown in FIG. The wire 13 whose cross-sectional shape has been deformed is
, Guide roller 68, brake guide 69, and guide 71
After that, the molding die 29, the holding die 31, and the holding die 32 are wound around the metal core 21.

The core metal 21 is provided with a collet chuck shaft device 22.
The rolling section 8 on the supply side of the wire 13 and the forming table head 19 move toward the metal core receiving spindle 23 together with the wire 13 so that the wire 13 is wound around the metal core 21 in a coil shape. I have. The rolling unit 8 moves,
When the limit switch 58 is operated by the striker 54, the upper roller 14 moves up to stop rolling.

Thereafter, the rolling section 8 on the supply side of the wire rod 13 and the forming table head 19 continue to move so that the unrolled wire rod 13 is wound around the core metal 21. The movement of the striker 48 attached to the motor is stopped by operating the limit switch 52, and the winding is completed. Wire rod 1
The winding pitch of No. 3 depends on the rotation speed of the electric motor 12 and the rolling section 8.
And the moving speed of the molding table head 19. Note that the position and length of the part whose cross-sectional shape is to be deformed, that is, the part whose hardness of the sheath is to be changed, can be adjusted by moving the limit switches 57 and 58.

As described above, even when it is desired to change the hardness of a part of the sheath, the wire rod 1 wound around the core
It is not necessary to connect a separate sheath by performing rolling at a desired position with respect to 3, the number of assembling steps is small,
An integrally molded sheath can be easily manufactured.

(Second Embodiment) FIGS. 8 and 9 relate to a second embodiment of the present invention. FIG. 8 is an explanatory view of a rolling section, and FIG. 9 is a view taken in the direction of arrow in FIG. FIG. 9A is FIG.
FIG. 9B is a view taken in the direction of the arrows GG ′ in FIG. 8.

The rolling section 8 includes three sets of rolling rollers 76, 77, 77 whose outer diameters sequentially increase from the entrance side to the exit side of the wire rod 13.
78 are provided. These rolling rollers 76, 7
7, 78 are driven by the same gear system (not shown) so that the peripheral speeds of the rolling rollers 76, 77, 78 are sequentially increased. Therefore, the rolling roller 7 on the entrance side
The wire rod 13 that has exited 6 is stretched by an intermediate rolling roller 77, and the wire rod 13 that has exited the intermediate rolling roller 77 is pushed down by a rolling roller 78 on the outlet side. Has become. In this way, the wire 13
Are sequentially stretched and deformed from a circular cross section as shown in FIG. 9B to a thinner circular cross sectional shape as shown in FIG. 9A. The rolling rollers 76,
The outer diameters of the rollers 77, 78 may be the same, and the peripheral speed of each of the rolling rollers 76, 77, 78 may be changed by a gear system.

Now, the operation of the sheath forming apparatus configured as described above will be described. The wire 13 is introduced into the rolling roller 9 via the guide roller 64 and the guide 66.

When the limit switch 57 operates, the introduced wire rod 13 is lowered by the rolling rollers 76, 77,
Rolling is performed by a predetermined length by the electric motor 12 being rotated by being nipped by the rollers on the upper side of 78. The circumferential speed of these three sets of rolling rollers 76, 77, 78 is sequentially increased. Therefore, the wire 13 is stretched by passing through the rolling rollers 76, 77, 78, and FIG. The shape is changed from a circular cross section as shown in FIG. 9B to a finer circular cross sectional shape as shown in FIG. The wire rod 13 whose cross section has been deformed is wound around the core metal 21 by the forming die 29, the pressing die 31 and the pressing die 32 via the guide 67, the guide roller 68, the brake guide 69 and the guide 71.

When the rolling section 8 moves and the limit switch 58 is operated, the upper rollers of the rolling rollers 76, 77, 78 move up and stop expanding.

Other configurations and operations are the same as those of the first embodiment.

(Third Embodiment) FIGS. 10 and 11
FIG. 10 relates to a third embodiment of the present invention, FIG. 10 is an explanatory view of a rolling section, and FIG.
10A is a view taken in the direction of the arrows HH 'in FIG. 10, FIG. 11B is a view taken in the direction of the arrows II' in FIG. 10, and FIG. 11C is a view taken in the direction of the arrows JJ 'in FIG. FIG.

The rolling section 8 includes a drawing die 81 and three sets of rolling rollers 9. As shown in FIG. 11B, the drawing die 81 has a square hole 82 formed at the center by a side slightly smaller than the outer diameter of the wire 13.
The upper die 83 and the lower die 84 can be further divided into two by a plane including the longitudinal center of the hole 82. The upper die 83 can be raised and lowered by an air cylinder (not shown). The rolling roller 9 has the same outer diameter in all three sets, and the wire rod 13 inserted through the hole 82 of the drawing die 81.
Is pulled out to change the cross-sectional shape.

Now, the operation of the sheath forming apparatus configured as described above will be described. The wire 13 is introduced into the drawing die 81 and the rolling roller 9 via the guide roller 64 and the guide 66.

When the limit switch 57 is operated, the introduced wire 13 is pressed by the upper die 83 and the upper roller 14 which are lowered, and is pulled out by a predetermined length by the rotation of the rolling roller 9 by the electric motor 12. It has become so. Therefore, when the wire 13 is pulled out of the drawing die 81, the wire 13 shown in FIG.
A circular cross section shown in FIG. 11C is deformed by a drawing die 81 shown in FIG. 11B into a substantially square cross section shown in FIG. 11A.
The wire rod 13 whose cross section has been deformed is wound around the core metal 21 by the forming die 29, the pressing die 31 and the pressing die 32 via the guide 67, the guide roller 68, the brake guide 69 and the guide 71.

The rolling unit 8 moves, and the limit switch 58
Is operated, the upper die 83 and the upper roller 14 are raised, and the drawing is stopped. In the present embodiment, the shape of the hole of the drawing die 81 is square, but may be triangular or circular.

Other structures and operations are the same as those of the first embodiment.

[Supplementary Note] (Supplementary Note 1) A rolling portion 8 capable of deforming a wire into a predetermined cross-sectional shape and slidable on a guide rod 7, and both ends are rotatably gripped by receiving portions. A core metal in which a deformed wire or undeformed wire is wound in a coil shape, and a coil is formed by winding a wire around the core,
A forming table head that can move on a guide bar in connection with the rolling section, a feeding device that sends a wire rod to the core bar in a fixed amount, and a guide table parallel to the guide bar so that the forming table head can move on the guide bar. And a long screw rod screwed with a forming table head, and a wire wound around the core metal in a coil shape to form a sheath, and then sent out by a feed roller in one of the receiving portions for gripping the core metal. And a product receiving roller device for receiving the formed sheath.

(Additional Item 2) The sheath forming apparatus according to additional item 1, wherein the rolling section deforms the wire rod by a plurality of sets with two rollers as one set.

(Additional Item 3) The sheath forming apparatus according to Additional Item 1, wherein the rolling section deforms a cross-sectional shape by sandwiching and crushing a wire rod with a roller.

(Additional Item 4) The rolling section stretches the wire rod by increasing the peripheral speed of the rear roller of the plurality of rollers to be higher than the peripheral speed of the front roller, thereby deforming the cross-sectional shape. 2. The sheath forming apparatus according to claim 1, wherein

(Additional Item 5) The sheath forming apparatus according to additional item 1, wherein the rolling section deforms a cross-sectional shape by extracting a wire with a drawing die.

(Additional Item 6) The sheath forming apparatus according to Additional Item 1, wherein the rolling section is capable of continuously changing a roller rolling force for sandwiching a wire.

(Additional Item 7) The sheath forming apparatus according to Additional Item 1, wherein the rolling section can perform rolling to a desired portion by moving a limit switch.

(Additional Item 8) The sheath forming apparatus according to additional item 1, wherein the rolling section can change the number of rotations of a rolling roller.

(Additional Item 9)
The lower surface has a female screw portion screwed with the screw rod, and further has a forming die for winding a wire around a core bar on the upper surface, a pressing die for pressing a wire around the core bar against the receiving portion, and a forming die. A pressing die that supports the forming force,
2. The sheath forming apparatus according to claim 1, further comprising a device for applying a lubricant to each of the dies with a pump or the like for quantitatively determining a lubricant.

(Additional Item 10) The sheath forming apparatus according to additional item 1, wherein the screw rod can change the number of rotations.

(Supplementary Note 11) The feeder includes a wire stand having a drive such as a motor capable of setting a wire rod, a wire rod guide connected to the drive unit and provided with a tension switch, and a wire rod and a rolling unit. 2. The sheath forming apparatus according to claim 1, further comprising: a disconnection detector provided between the two for detecting presence or absence of a wire.

[0047]

As described above, according to the sheath forming apparatus of the present invention, it is not necessary to connect a plurality of sheaths having different wire diameters with a connecting pipe in order to change the hardness. A sheath having portions having different hardness diameters can be formed, the number of parts is small, an assembling process can be simplified, and a sheath having no hard portion such as a connection pipe can be manufactured.

[Brief description of the drawings]

FIG. 1 to FIG. 7 relate to a first embodiment of the present invention, and FIG. 1 is a plan view of a sheath forming apparatus.

FIG. 2 is a view taken in the direction of arrows AA 'in FIG.

FIG. 3 is a view taken in the direction of arrows BB ′ in FIG. 1;

FIG. 4 is an explanatory view of winding a sheath.

FIG. 5 is a view taken in the direction of arrows CC ′ in FIG. 4;

6 is a view in the direction of the arrow in FIG. 5, and FIG.
(A) is a view taken in the direction of the line DD ′ in FIG. 5, and (b) is a view in FIG.
FIG.

FIG. 7 is an explanatory view of a forming die.

FIG. 8 and FIG. 9 relate to a second embodiment of the present invention, and FIG. 8 is an explanatory view of a rolling section.

9 is a view taken in the direction of the arrow in FIG. 8, and FIG.
FIG. 9A is a view taken in the direction of arrows FF ′ in FIG. 8, and FIG.
FIG.

FIG. 10 and FIG. 11 relate to a third embodiment of the present invention, and FIG. 10 is an explanatory view of a rolling section.

FIG. 11 is a view taken in the direction of the arrow in FIG. 10;
FIG. 11A is a view taken in the direction of arrows HH ′ in FIG.
(B) is a view taken in the direction of the arrow II ′ in FIG. 10, and FIG. 11 (c) is a view taken in the direction of the arrow JJ ′ in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sheath forming apparatus 2 ... Rolling apparatus 3 ... Sheath winding machine 4 ... Product receiving roll apparatus 8 ... Rolling part 9 ... Rolling roller 13 ... Wire rod

Claims (3)

[Claims] 1. A rolled portion capable of deforming a wire into a predetermined cross-sectional shape and slidable on a guide rod, and a wire or a deformed shape which is rotatably gripped by receiving portions at both ends and received by the rolled portion. A core metal on which a non-formed wire is wound in a coil shape; a forming table head capable of forming a coil by winding a wire on the core metal, connecting to the rolling section and moving on a guide rod, and a wire on the core metal A feeding device that feeds the molding table head in a fixed amount, a long screw rod that is provided in parallel with the guide rod so that the molding table head can move on the guide rod, and screws the molding table head, A product receiving roller device for receiving the sheath sent out by a feed roller in one of the receiving portions for holding the metal core after forming the sheath by winding it in a coil shape; Molding equipment. 2. The sheath forming apparatus according to claim 1, wherein the rolling section deforms the wire rod by a plurality of sets with two rollers as one set. 3. The sheath forming apparatus according to claim 1, wherein the rolling section deforms a cross-sectional shape by sandwiching and crushing the wire with a roller.