JP3526419B2 - Sheath forming device - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art In recent years, by inserting a small-diameter insertion portion into a body cavity, it is possible to observe the internal organs of the body cavity or the like and, if necessary, to perform various medical treatments using a treatment instrument inserted into a treatment instrument channel. Medical endoscopes that can be used are widely used. Further, also in the industrial field, industrial endoscopes capable of observing the inside of boilers, turbines, engines, chemical plants, etc. are widely used. The 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 of a close contact coil having a treatment section attached to a distal end thereof, and the treatment section is pulled and loosened to move the treatment section. It can be operated.

[0003]

However, the sheath formed of the close-wound coil is used, for example, in the case where it is desired to make a soft sheath by thinning the wire diameter of the wire rod in order to improve the bendability in the vicinity of the treatment portion. If you want to thicken the wire diameter of the desired part to make it hard and make it a hard sheath, connect the sheath formed of the wire material of the thick wire diameter with the sheath formed of the wire material of the thin wire diameter with the connection pipe. However, according to this method, there are disadvantages that the number of parts is large, the number of assembling steps such as sanding for finishing is large, and the sheath has a hard portion due to the connecting pipe.

The present invention has been made in view of the above points, has a small number of parts, can simplify the assembly process,
Further, it is another object of the present invention to provide a sheath forming device capable of producing a sheath having no rigid portion such as a connecting 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 sectional shape and slidable on a guide rod, and receiving sections at both ends. A cored bar that is rotatably gripped and is wound around the coil with a deformed wire or an undeformed wire that passes through the rolling section, and a wire is wound around the cored bar to form a coil, which is connected to the rolling section. A forming table head that is movable on the guide rod, a feeding device that sends the wire rod to the core metal in a fixed amount, and the forming table head is provided in parallel with the guide rod so that the forming table head can move on the guide rod. After forming a sheath by winding a wire rod around the core metal in a coil shape with a long screw rod to which a head is screwed, a sheath fed by one of the feed rollers is held in one of the receiving portions that grips the core metal. Kicking those constructed from a product receiving roller device.

[Operation] The operation of this structure is integrated by partially deforming the cross-sectional shape of the wire continuously supplied to the sheath winding device by the rolling device and winding it around the cored bar. A sheath having partially different diameters is manufactured.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION 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 along the line AA 'in FIG. , FIG. 3 shows BB ′ of FIG.
4 is an explanatory view of the sheath winding, FIG. 5 is a CC ′ direction arrow view of FIG. 4, and FIG. 6 is a direction arrow view of FIG.
6A is a view taken in the direction of arrows D-D 'in FIG. 5, FIG. 6B is a view taken in the direction of lines E-E' in FIG. 5, and FIG. 7 is an explanatory view of the molding die.

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

In the rolling apparatus 2, a rolling section 8 is slidably provided on the guide rods 7 on two guide rods 7 arranged side by side on the pedestal 6. The rolling unit 8 is provided with an electric motor 12 that drives the rolling roller 9 parallel to the longitudinal direction of the guide rod 7 via a speed reducer 11 and a gear system (not shown). Rolling roller 9 driven by this electric motor 12
For example, three sets of two pieces are provided, and the wire rods 13 supplied at right angles to the longitudinal direction of the guide rods 7 can be sequentially compressed by air pressure and pressed against each other.
The rotation speed of the electric motor 12 can be adjusted by a speed adjusting slidac (not shown) so that it can be changed corresponding to the wire diameter of the wire rod 13.

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

The sheath winding machine 3 provided adjacent to the rolling device 2 has a guide rod 7 of the rolling device 2 mounted on a frame 16.
Two guide rods 17 are arranged in parallel with each other in the longitudinal direction, and a screw rod 18 is provided between the two guide rods 17 in parallel with the guide rod 17. On the guide rod 17, a female head portion 20 in which the molding head table 19 is screwed into the screw rod 18 is formed.
Is fixed and slidably provided on the guide rod 17. The forming table head 19 is connected to the rolling unit 8, and the screw rod 18 rotates so that the forming table head 19 can be moved and the rolling unit 8 can be moved. On this forming table head 19, the wire 1
3 is provided with a cored bar 21 parallel to the longitudinal direction of the guide rod 17, one end of the cored bar 21 is gripped by a collet chuck shaft device 22 as a receiving part, and the other side of the cored bar 21. It is designed such that the end of the core is held by the core receiving spindle 23 as a receiving portion.

The collet chuck shaft device 22 is provided at an end portion on the pedestal 16, and the cored bar 21 held by the collet chuck shaft device 22 is rotated by a motor 24 provided below the pedestal 16 via a V-belt 26, and The wire 13 is wound around the gold 21 in a coil shape. Further, the output shaft of the electric motor 24 is also connected to the input end of the continuously variable speed reducer 27 so as to drive the screw rod 18 via the V belt 28 after the speed is reduced. The moving speed of the forming table head 19 can be adjusted by adjusting the number of revolutions by the continuously variable transmission 27.
The winding pitch of can be adjusted.

In FIG. 7, the molding table head 1 is shown.
A female thread portion 20 with which the screw rod 18 is screwed is provided in the lower portion of the reference numeral 9, and a core bar 21 and a wire rod 13 are provided in the upper portion.
Is provided with a pressing die 31 for pressing the wire 13 wound around the cored bar 21 to the collet chuck side, and a pressing die 32 for supporting the molding force of the molding die 29. The pressing die 32 is biased 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 in biasing force by an adjusting bolt 34.

An electric motor 36 is provided below the frame 16 of the sheath winding machine 3 and on the opposite side of the electric motor 24 so that the screw rod 18 can be reversed by means of a V-belt 37. After the winding of the wire 13 around the cored bar 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 coiled wire 13 sent from the sheath winding machine 3 on the upper part of the gantry 39, and further, the sheath winding machine. A nipper 42 that can cut the fed wire 13 at a predetermined position is provided on the end face of the gantry 39 on the third side, and can be driven by air pressure.

Between the plurality of feed rollers 41, a plurality of pedestals 43 are provided 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 rotates and the molded wire rod 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.

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 on the longitudinal side of the frame 16 of the sheath winding machine 3. Is provided in a predetermined position from the core bar receiving spindle side. Of these, the limit switch 49 is provided closest to the collet chuck side, and serves to close the collet chuck side device 22 and the start position during automatic operation. Further, the limit switch 51 adjacent to the limit switch 49 is adapted to operate only when the striker 48 hits the core metal receiving spindle side. The cutting position by the nippers 42 provided on the end surface of the product receiving roll device 4 can be set. Further, the limit switch 52 provided on the core receiving spindle side is adapted to open the collet chuck shaft device 22 after the winding and forming process is completed, so that the winding length can be adjusted. . The limit switch 53, which is adjacent to the limit switch 52 and closest to the core receiving spindle 23, causes an emergency stop of the machine by the limit switch 53 if the limit switch 52 does not stop for some reason. Has become.

In addition to the above, on the rolling mill 2 side, limit switches 56, 57, 58 are provided on the side of the gantry 6 and operated by the striker 54 directed to the side of the rolling unit 8. First, the limit switch 56 provided on the collet chuck side is designed to make the machine emergency stop when it does not stop at the position of the limit switch 49 provided on the sheath winding machine 3. Further, a limit switch 57 provided adjacent to the limit switch 56 is for lowering the upper roller 14 of the rolling roller 9 to rotate the electric motor 12, and the striker 54 hits from the collet chuck side. It's only designed to work. Further, a limit switch 58 provided adjacent to the limit switch 57 and provided on the core metal receiving spindle 23 side raises the upper roller 14 of the rolling roller 9 to drive the rolling roller 9.
For stopping the striker 54, and operates only when the striker 54 hits from the collet chuck side.

Now, the operation of the sheath forming apparatus having the above-mentioned structure will be described. In FIG. 4, the wire rod 13
Is introduced into the rolling roller 9 as a feeding device from the wire base 59 through the back tensioner 61, the guide roller 62, the disconnection detector 63, the guide roller 64, and the guide 66.

When the forming table head 19 starts moving and the limit switch 57 operates, the introduced wire 13 is narrowed by the upper roller 14 that has descended, and the electric motor 12 is driven.
Rolling roller 9 rotating in the direction of the arrow as shown in FIG.
Is rolled by a predetermined length.
The rolling force of each of the three sets of rolling rollers 9 can be adjusted individually by adjusting the air pressure, and by sequentially increasing the rolling force, as shown in FIG.
A circular cross section as shown in FIG. 6 can be transformed into a cross sectional shape having flat portions at the top and bottom as shown in FIG. The wire rod 13 whose cross-sectional shape is deformed is guided by the guide 667.
And guide roller 68, brake guide 69 and guide 71
After that, the core die 21 is wound around the molding die 29, the pressing die 31, and the pressing die 32.

The core metal 21 is a collet chuck shaft device 22.
The wire rod 13 is wound around the core metal 21 in a coil shape because the rolling part 8 on the supply side of the wire rod 13 and the forming table head 19 are moved to the core metal receiving spindle 23 side. There is. The rolling section 8 moves,
When the limit switch 58 is operated by the striker 54, the upper roller 14 moves up and the rolling is stopped.

After that, the rolling section 8 on the supply side of the wire 13 and the forming table head 19 continue to move so that the unrolled wire 13 is wound around the cored bar 21. The striker 48 attached to the switch operates the limit switch 52 to stop the movement, and the winding is completed. Wire 1
The winding pitch of 3 is the number of rotations of the electric motor 12 and the rolling part 8
And the moving speed of the molding table head 19 in combination. The position and length of the portion whose cross-sectional shape is desired to be changed, that is, the portion where the hardness of the sheath is desired 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 1 wound around the cored bar 21
It is not necessary to connect a separate sheath by rolling at a desired position with respect to 3, and the number of assembling steps is small,
The 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 direction arrow view of FIG. , FIG. 9 (a) is shown in FIG.
9 is a view from the direction of the arrow F-F 'in FIG. 9, and FIG. 9B is a view from the direction of the arrow G-G' from FIG.

The rolling section 8 has three sets of rolling rollers 76, 77, whose outer diameter increases in order from the inlet side to the outlet side of the wire 13.
78 is provided. These rolling rollers 76, 7
7 and 78 are driven by the same gear system (not shown), and the peripheral speeds of the rolling rollers 76, 77 and 78 are sequentially increased. Therefore, the rolling roller 7 on the inlet side
The wire rod 13 exiting 6 is stretched by the intermediate rolling roller 77, and the wire rod 13 exiting the intermediate rolling roller 77 is pushed by the exit side rolling roller 78. Has become. In this way, the wire rod 13
Are sequentially stretched and deformed from a circular cross section as shown in FIG. 9 (b) to a narrower circular cross section as shown in FIG. 9 (a). The rolling rollers 76,
The outer diameters of 77 and 78 may be the same, and the peripheral speeds of the rolling rollers 76, 77 and 78 may be changed by a gear system.

Now, the operation of the sheath forming apparatus having the above-mentioned structure will be described. The wire 13 is introduced to the rolling roller 9 via the guide roller 64, the guide 66, and the like.

The introduced wire 13 is lowered by the rolling rollers 76, 77, when the limit switch 57 operates.
The rollers are pressed by rollers 78 on the upper side, and the electric motor 12 is rotated to roll a predetermined length. The peripheral speeds of the three sets of rolling rollers 76, 77, 78 are sequentially increased, so that the wire rod 13 is stretched by passing through the rolling rollers 76, 77, 78, as shown in FIG. The circular cross section shown in FIG. 9B is transformed into a finer circular cross section as shown in FIG. The wire material 13 whose cross-sectional shape is deformed is wound around the core metal 21 by the forming die 29, the holding die 31, and the holding die 32 through 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 operates, the rollers on the upper side of the rolling rollers 76, 77, 78 rise and stop stretching.

Other configurations and operations are similar to those of the first embodiment.

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

The rolling section 8 comprises a drawing die 81 and three sets of rolling rollers 9. The drawing die 81 has a square hole 82 formed by a side slightly smaller than the outer diameter of the wire rod 13 at the center as shown in FIG. 11B.
Is further provided, and the upper die 83 and the lower die 84 can be divided into two in 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 rollers 9 have the same outer diameter in all three sets, and the wire rod 13 is 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 having the above-mentioned structure will be described. The wire 13 is introduced into the drawing die 81 and the rolling roller 9 via the guide roller 64, the guide 66 and the like.

The introduced wire 13 is pinched by the upper die 83 and the upper roller 14 which have descended when the limit switch 57 operates, and is pulled out by a predetermined length as the rolling roller 9 is rotated by the electric motor 12. It has become so. Therefore, when the wire rod 13 is pulled out by the drawing die 81,
The circular cross section as shown in FIG. 11C is transformed by the drawing die 81 as shown in FIG. 11B into a substantially rectangular cross-sectional shape as shown in FIG. 11A.
The wire material 13 whose cross-sectional shape is deformed is wound around the core metal 21 by the forming die 29, the holding die 31, and the holding die 32 through the guide 67, the guide roller 68, the brake guide 69, and the guide 71.

The rolling section 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. Although the shape of the hole of the drawing die 81 is quadrangular in the present embodiment, it may be triangular or circular.

Other configurations and operations are similar to those of the first embodiment.

[Additional remarks] (Additional remark 1) A rolling part 8 which is capable of deforming a wire rod into a predetermined cross-sectional shape and is slidable on a guide rod 7, and both ends are rotatably gripped by receiving parts, and the rolling part A wire rod that has been deformed through or a wire rod that has not been deformed is wound into a coil, and a coil is formed by winding the wire rod around the core metal,
A forming table head that is connected to the rolling unit and is movable on a guide rod, a feeding device that feeds a wire material to the core metal in a fixed amount, and a forming table head that is parallel to the guide rod so that the forming table head can move on the guide rod. A long screw rod with which a molding table head is screwed, and a wire is wound around the core metal in a coil shape to form a sheath, and then the inside of the one receiving portion that grips the core metal is fed by a feed roller. And a product receiving roller device for receiving the formed sheath, and a sheath forming device.

(Additional Item 2) The sheath forming apparatus according to Additional Item 1, wherein the rolling unit deforms the wire rod by a plurality of groups with two rollers as one group.

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

(Additional Item 4) The rolling section is characterized in that, among a plurality of sets of rollers, the peripheral speed of the rear roller is made faster than the peripheral speed of the front roller to elongate the wire material and deform the sectional shape. The sheath forming apparatus according to Additional Item 1.

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

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

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

(Additional Item 8) The sheath forming apparatus according to Additional Item 1, wherein the rolling unit can change the rotation speed of the rolling roller.

(Additional Item 9) The molding table head comprises:
The lower surface has a female thread portion in which the screw rod is screwed, and further, a molding die for winding the wire rod around the core metal on the upper surface, and a pressing die for pressing the wire rod wound around the core metal to the receiving portion side and the molding die. A pressing die that supports the forming force,
The sheath forming apparatus according to Additional Item 1, wherein the sheath forming apparatus is configured by a device such as a pump that appropriately applies a lubricant to each of the die parts described above.

(Additional Item 10) The sheath forming apparatus according to Additional Item 1, wherein the number of revolutions of the screw rod is variable.

(Supplementary Note 11) In the above-mentioned feeding device, the wire rod having a drive such as a motor capable of setting the wire rod, a wire rod guide connected to the drive portion and provided with a tension switch, and the wire rod and the rolling portion are provided. The sheath forming apparatus according to appendix 1, further comprising: a wire breakage detector that is provided between the wire breaker detector and the wire breaker detector.

[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 by a connecting pipe in order to change the hardness, and a single wire can be used continuously. It is possible to form a sheath having portions having different hardness diameters, and to reduce the number of parts, simplify the assembling process, and manufacture a sheath having no rigid portion such as a connecting pipe.

[Brief description of drawings]

1 to 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 on arrow AA ′ in FIG.

FIG. 3 is a view in the direction of arrow BB ′ in FIG.

FIG. 4 is an explanatory view of sheath winding.

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

6 is a view taken in the direction of the arrow in FIG.
5A is a view taken in the direction of the arrows D-D 'in FIG. 5, and FIG.
EE 'direction arrow view of FIG.

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

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

9 is a view taken in the direction of the arrow in FIG.
8A is a view as seen from the direction indicated by arrows FF ′ in FIG. 8, and FIG.
GG 'direction arrow view of 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 unit.

11 is a view from the direction of the arrow in FIG.
FIG. 11A is a view taken in the direction of arrow HH ′ in FIG.
FIG. 11B is a view taken along the line II ′ of FIG. 10, and FIG. 11C is a view taken along the line JJ ′ of FIG.

[Explanation of symbols] 1… Sheath forming device 2… Rolling equipment 3… Sheath winding machine 4… Product receiving roll device 8… Rolling department 9 ... Rolling roller 13 ... Wire rod

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Claims (3)

(57) [Claims] 1. A rolling member capable of deforming a wire rod into a predetermined cross-sectional shape and slidable on a guide rod, and a wire rod deformed or deformed through the rolling member which is rotatably gripped by receiving portions at both ends. A core metal on which a wire rod not wound is wound in a coil shape, a coil is formed by winding the wire rod around the core metal, a molding table head that is movable on a guide rod in connection with the rolling unit, and a wire rod on the core metal. A feeding device that feeds out a fixed amount, the molding table head is provided in parallel with the guide rod so that the molding table head can move on the guide rod, and a long screw rod into which the molding table head is screwed, and a wire rod on the core metal. A product receiving roller device for receiving a sheath sent out by a sending roller in one of the receiving parts for holding a core after forming a sheath by winding in a coil shape, and a sheath. Molding equipment. 2. The sheath forming apparatus according to claim 1, wherein the rolling unit 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 unit deforms the cross-sectional shape by sandwiching and crushing the wire rod with rollers.