JP2006088188A - Apparatus for manufacturing injection needle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for manufacturing injection needles, which apparatus can simultaneously grind tip points of cut tubes arranged in a line. <P>SOLUTION: The apparatus for manufacturing the injection needles is composed of a cutting-off device for cutting off a thin tube which serves as a material for the injection needles, a supplying device which has a hopper portion for receiving the cut tubes therein, and arranges the cut tubes on an arrangement device in a line, an aligning device which displaces the cut tubes to the vertical position by holding the cut tubes arranged in a line and arranges the lower ends of the cut tubes in a line by putting the lower ends of the cut tubes on a stepped portion, a first carrying device which grips the upper ends of the cut tubes held by the aligning device and carries the cut tubes to a grinding device when the aligning device has released the grip of the cut tubes, a grinding device which fixes the carried cut tubes by snapping them as they are by means of a holder and forms the tip points on the upper portions of the fixed cut tubes, a second carrying device which carries the cut tubes from the grinding device to a honing device by gripping the cut tubes, and a honing device which completes the injection needles by carrying out the deburring of the cut tubes having the tip points formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an injection needle manufacturing apparatus that manufactures an injection needle by subjecting cut tubes arranged in a row to polishing and honing.

Conventionally, in order to manufacture an injection needle, the cutting tube is polished one by one with a polishing apparatus using a grindstone to form the cutting edge, and there is a problem in terms of workability.
Further, for example, in Japanese Patent Application Laid-Open No. 2003-88584, a pipe having a reduced diameter is formed by bundling a plurality of original pipes (cut tubes) and drawing, and a sharp cutting edge is formed at the tip of the pipe while being bundled. A manufacturing method is disclosed.
However, in this manufacturing method, the tips of the bundled narrow tubes are shifted obliquely and polished to form the blade tip on the entire thin tube, but the blade tip is formed accurately if the amount of diagonal shift is not constant. I can't.
And the solution about this point is not disclosed in the publication.
Further, this injection needle uses a group of thin tubes in which a large number of thin tubes are bundled as an injection needle, and is different from a normal configuration in which one injection needle is attached to a syringe.
Refer to FIG. 2 (C).

  The problem to be solved by the present invention is to perform a series of steps of aligning the lower ends of the cut tubes with an aligning device, forming a cutting edge on the cut tube with a polishing device, and deburring with a honing machine. An object of the present invention is to provide an injection needle manufacturing apparatus that can be used.

In order to solve the above-described problems, the present invention provides an injection needle manufacturing apparatus according to claim 1,
A cutting machine that cuts a metal thin tube that is a raw material of an injection needle into a predetermined same dimension;
A feeding device that has a hopper portion into which the plurality of cut tubes that have been cut are placed, and that arranges the cut tubes horizontally one by one on the alignment device;
An alignment device for holding the aligned cut tubes and displacing them vertically, placing the lower ends of the cut tubes on the stepped portions, and aligning the lower ends of the cut tubes;
A first conveying machine that holds the upper ends of the cut tubes held by the aligning device with the lower ends aligned, and conveys the cut tubes to the polishing device when the aligning device releases the holding of the cut tubes;
A polishing apparatus that has a jig for clamping and fixing the conveyed cut tube as it is, and polishing the upper part of the cut tube fixed to the jig with a polishing means to form a cutting edge;
A second conveying machine for grasping the cut tube formed with the cutting edge and conveying it from the polishing apparatus to the honing machine;
It comprises a honing machine for deburring the cut tube formed with the cutting edge to complete the injection needle.

In the invention of claim 2,
A tilting part pivoted to be horizontally or vertically displaceable with respect to the support;
A mounting base for a cut tube provided on the tilting portion;
A holding part that is pivotally attached to the tilting part so as to be displaceable in a parallel or orthogonal position and has an extendable leg part, and holds the cut tube on the mounting table;
An alignment platform is provided at the rear of the tilting fulcrum of the tilting section, has a column that can be moved up and down, and a step that aligns the lower end of the cut tube at the same level position above the column. It is characterized by comprising a bottom aligned portion.

In the invention of claim 3,
A chuck in which the polishing apparatus includes a fixed portion and a movable portion that approaches or separates from the fixed portion, and clamps and fixes a lower side of the cut tube disposed between the fixed portion and the movable portion. And
A pressure unit that pushes the upper side of the cut tube toward the polishing unit;
It consists of a disk-shaped grindstone supported in a freely rotatable manner, and is composed of a polishing portion that polishes the extruded upper portion of the cut tube to form a cutting edge.
Furthermore, in the invention of claim 4,
The first transporter and the second transporter are the same transporter, and the transporter is disposed above and is provided in the air passing above the aligner, the polishing device, and the honing machine. And a gripping part for gripping the upper end of the cut tube at the bottom via an arm that can be moved up and down.
In the invention of claim 5,
A storage device for storing a predetermined number of injection needles formed by the honing machine in a storage box is provided.

In the injection needle manufacturing apparatus according to the present invention, a hollow wire is cut by a cutting machine to form cut tubes having the same predetermined length, and the cut tubes are arranged in a line on an alignment device by a feeder. The apparatus aligns the lower ends of the cut tubes in a row with the apparatus, and the cut tubes to be polished are supplied to the polishing apparatus using the transfer machine while maintaining the posture. It is possible to form the injection needle uniformly by forming the cutting edge uniformly and then removing the burr generated in the cutting edge portion with a honing machine.
Thereby, since the cutting edge can be simultaneously polished on a large number of cut tubes arranged in a row to form an injection needle, it is suitable for industrial mass production and is extremely useful.
Moreover, the alignment apparatus consists of a tilting part, a holding member, and a lower end alignment part, and can accurately align the lower ends of the cut tubes with a simple configuration.

In this invention, a row of cut tubes supplied from a supply machine are aligned accurately by aligning the lower ends with an alignment device, and transferred to a polishing device via a conveyor while maintaining this posture to polish the cutting edge. Further, the blade is deburred by being transferred to a honing machine by a conveyor.
Hereinafter, preferred embodiments of the injection needle manufacturing apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an injection needle manufacturing apparatus 1.
The injection needle manufacturing apparatus 1 includes a cutting machine 2, a hopper unit 3, a feeder 4, an aligning device 5, a polishing device 6, a conveyor 7, and a honing machine 8.
Further, a storage device 9 may be connected to the honing machine 8.

The injection needle manufacturing apparatus 1 cuts a thin tube made of metal such as stainless steel, which is a raw material of the injection needle, into a predetermined same dimension and forms it into a cut tube 10.
The plurality of cut tubes 10 thus cut are put into the hopper section 3.
The cut tubes 10 put into the hopper unit 3 are continuously discharged by the feeder 4 and are arranged in a line on the alignment device 5.

[Alignment device]
Here, the aligning device 5 has a tilting portion 11 pivotally attached to the support 16 fixed to the installation surface so as to be displaceable to a horizontal standby position or a vertical operating position with the tilting fulcrum P1 as a fulcrum. Have.
The tilting part 11 is composed of a frame, and in the example shown in the figure, the mounting table 12 is fixed to the tilting part 11 so as to be on the same surface by arranging bars with a circular cross section at regular intervals on one side surface. The cut tube 10 can be placed on the mounting table 12 so as to intersect the extending direction of the bar.
Then, while the feeder 4 moves on the mounting table 12 in a horizontal posture, as shown in FIG. 2 (a), a predetermined number of the cut tubes 10 are arranged in a line in the front and rear so as to align the length direction thereof. They are arranged on the mounting table 12.

The tilting part 11 includes a leg part 13b whose base end is pivotally attached to a pivot point P2 on the side wall surface (side frame part), and a holding part 13a attached to the distal end of the leg part 13b. A holding member 13 is provided.
The holding portion 13a can hold the cut tube 10 on the mounting table 12, and in the present embodiment, the holding portion 13a is made of a magnet so that the cut tube 10 can be magnetized.
Further, the leg portion 13b has an air cylinder structure and is extendable and retractable so that the leg portion 13b can be pivoted parallel or orthogonal to the tilting portion 11 with the pivot point P2 as a fulcrum. It is attached.

When a predetermined number of cut tubes 10 are arranged in series on the mounting table 12, the holding member 13 is moved from the horizontal posture of FIG. 2 (a) to the vertical of FIG. 2 (b) with the pivot point P2 as a fulcrum. It tilts to a posture and is displaced to a position directly above the upper end of the cut tube 10.
Next, as shown in FIG. 2C, the leg portion 13b is shortened, the holding portion 13a is lowered and brought into contact with the cut tube 10, and the upper end of the cut tube 10 is magnetically attached and held.

With the above posture, as shown in FIG. 3A, the tilting portion 11 tilts from the horizontal posture to the vertical posture with the tilting fulcrum P1 as a fulcrum.
Further, the holding member 13 extends the leg portion 13 b to separate the cut tube 10 from the mounting table 12.
This separation position corresponds to the lower end aligning portion 17 arranged behind the base end (tilting fulcrum P1 side) of the tilting portion 11.
Here, the lower end aligning portion 17 has a column portion 15 that can be vertically expanded and contracted, and an alignment base portion 18 having a step portion that aligns the lower end of the cut tube 10 at the same level position is provided above the column portion 15. It is composed of

Therefore, the leg 13b is extended to a position directly above the cut tube 10 corresponding to the step of the alignment table 18 (FIG. 3A), and the column 15 is expanded upward to align the table. As shown in FIG. 3 (b), the lower end of the cut tube 10 is further pushed up by abutting against the step formed at a right angle of the alignment base 18, and the lower ends of the cut tubes 10 aligned in a row. Are aligned at the same level, and the upper end of the cut tube 10 slides upward beyond the holding portion 13a.
In this way, the cut tubes 10 having the same length arranged in a row are aligned and held on the basis of the lower end.

Next, the conveyor 7 that has traveled on the rail 31 at the top of the alignment device 5 extends the arm portion 32 and lowers the grip portion 33.
The grip 33 has a chuck structure that can be opened and closed, and grips the upper end of the cut tube 10 as shown in FIG.
Then, as shown in FIG. 4B, the arm portion 32 is shortened to raise the gripping portion 33, and the cut tube 10 is held in the air and conveyed to the next polishing device 6.
In this embodiment, the rail 31 is composed of a rail 31 provided in the air passing above the alignment device 5, the polishing device 6, and the honing machine 8, and the transport device 7 extends along the rail 31. Thus, it can freely move between the aligning device 5 and the polishing device 6 and between the polishing device 6 and the honing machine 8.

[Polishing equipment]
As shown in FIGS. 5 to 6, the polishing apparatus 6 includes a chuck portion 23 that holds the cut tube 10 and a pressurizing portion 24 that pushes the held cut tube 10 to a cutting position. A polishing section 25 is provided to cut the cut tube 10 against the section 23.
The chuck portion 23 includes a fixed portion 21 and a movable portion 22 that is pivotally displaced in the approaching or separating direction with respect to the fixed portion 21 and is set shorter than the fixed portion 21. The gripped row of cut tubes 10 is lowered between the fixed portion 21 and the movable portion 22, and the cut tube 10 is pressed against the inner surface side of the fixed portion 21 as indicated by a dotted line in the figure, so that the movable portion 22 is fixed. The cut tube 10 is clamped by closing so as to contact the portion 21 (see FIG. 6A).
At this time, the cut tube 10 is fixed to the chuck portion 23 in a position positioned by aligning the lower ends.

Next, as shown in FIG. 6B, the pressurizing unit 24 moves forward and deflects the upper part of the cut tube 10 fixed by the chuck unit 23 toward the polishing unit 25.
Here, the pressurizing portion 24 has a protrusion 24a at the tip, and in the case of the illustrated example, the tip of the protrusion is arranged so as to be in contact with the extension line of the inner wall surface of the fixing portion 21 as shown in FIG. Has been.
Further, a pressing portion 24b that is retracted by the thickness of the cut tube 10 from the protrusion 24a is provided at a position corresponding to the upper portion of the fixed portion 21 (and the upper position of the movable portion 22) below the protrusion 24a. Yes.
Therefore, the cut tube 10 fixed by the chuck part 23 is restrained by the pressing part 24b by the advancement of the pressurizing part 24, and the upper position is further pushed outward by the protrusion 24a.

Next, the polishing unit 25 is composed of a disk-shaped grindstone that is rotatably supported. The polishing unit 25 approaches the chuck unit 23 to a certain spaced position and polishes the extruded upper portion of the cut tube 10 to obtain a cutting edge. Form.
An example of the formation of the cutting edge is shown in FIG.
That is, the first stage polishes the entire circumference of the cut tube 10 diagonally (see FIG. 7A), and the second stage polishes substantially half of the polishing portion diagonally by changing the angle (FIG. 7B). 4), a cutting edge with a four-sided cut can be formed.
Although not shown, if the peripheral wall of the cut tube 10 is cut in a tapered shape in advance before the first stage, it can be cut into five faces.

In the cut tube 10 with the cutting edge cut in this way, the cut tube 10 held by the chuck portion 23 is gripped by the grip portion 33 of the transport device 7 in the reverse of the setting step shown in FIG. The movable portion 22 is separated to open the chuck portion 23 to release the cut tube 10, and the arm portion 32 is lifted to separate the cut tube 10 from the polishing apparatus 6 and convey it to the honing machine 8.
In the same way, the honing machine 8 can receive the cut tube 10 with the cutting edge formed from the transfer machine 7 and deburr the cutting edge portion to complete the injection needle.
As the honing machine 8, for example, a known configuration such as that disclosed in Japanese Patent Laid-Open No. 8-126960 may be used.

In the present invention, the cut tube 10 is transported between the aligning device and the polishing device and between the polishing device and the honing machine using a monorail transport device. However, the transport device has a different configuration. May be.
Moreover, although the structure using a grindstone was illustrated as a grinding | polishing apparatus, you may use not only a grindstone but a well-known cutting means.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

It is a block diagram of an injection needle manufacturing device. It is a side view which shows the effect | action of an alignment apparatus, and is a figure of the state which mounted the cut tube on the mounting base. It is a side view which shows the effect | action of an alignment apparatus, and is a figure of the state which the holding member displaced vertically. It is a side view which shows the effect | action of an alignment apparatus, and is a figure of the state which the holding member contacted the cut tube. It is a side view which shows the effect | action of an alignment apparatus, and is a top view of Fig.2 (a). It is a side view which shows the effect | action of an aligning apparatus, (a) is a figure of the state which the holding member hold | maintained the cut tube, (b) is a figure of the state which aligned the lower end of the cut tube. (A) is a side view of a state in which the conveying machine grips the aligned cut tubes, and (b) is a side view of the state in which the conveying machine separates and conveys the cut tubes from the alignment device. It is a side view which shows the chuck | zipper part and pressurization part of a grinding | polishing apparatus. It is a side view which shows the state which clamps a cut tube with a grinding | polishing apparatus. It is a side view of the state which bent the cut tube with the pressurization part. (A) is the first-stage cutting of the cut tube, (b) is an enlarged view showing the second-stage cutting. It is a front view which shows an example of a conveying machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection needle manufacturing apparatus 2 Cutting machine 3 Hopper part 4 Feeder 5 Alignment apparatus 6 Polishing apparatus 7 Conveyance machine 8 Honing processing machine 9 Storage apparatus 10 Cut tube 11 Tilt part 12 Mounting stand 13 Holding member 13a Holding part 13b Leg part 15 Support | pillar Part 16 Support 17 Lower end aligning part 18 Alignment base part 21 Fixed part 22 Movable part 23 Chuck part 24 Pressurizing part 24a Projection 24b Holding part 25 Polishing part 31 Rail 32 Arm part 33 Holding part

Claims (5)

A cutting machine that cuts a metal thin tube that is a raw material of an injection needle into a predetermined same dimension;
A feeding device that has a hopper portion into which the plurality of cut tubes that have been cut are placed, and that arranges the cut tubes horizontally one by one on the alignment device;
An alignment device for holding the aligned cut tubes and displacing them vertically, placing the lower ends of the cut tubes on the stepped portions, and aligning the lower ends of the cut tubes;
A first conveying machine that holds the upper ends of the cut tubes held by the aligning device with the lower ends aligned, and conveys the cut tubes to the polishing device when the aligning device releases the holding of the cut tubes;
A polishing apparatus that has a jig for clamping and fixing the conveyed cut tube as it is, and polishing the upper part of the cut tube fixed to the jig with a polishing means to form a cutting edge;
A second conveying machine for grasping the cut tube formed with the cutting edge and conveying it from the polishing apparatus to the honing machine;
An injection needle manufacturing apparatus comprising: a honing machine for deburring the cut tube formed with the cutting edge to complete the injection needle. An alignment device pivoted to be displaceable horizontally or vertically with respect to the support;
A mounting base for a cut tube provided on the tilting portion;
A holding part that is pivotally attached to the tilting part so as to be displaceable in a parallel or orthogonal position and has an extendable leg part, and holds the cut tube on the mounting table;
An alignment platform is provided behind the tilting fulcrum of the tilting portion, has a column portion that can be vertically expanded and contracted, and has a stepped portion that aligns the lower end of the cut tube at the same level position on the top of the column portion. The injection needle manufacturing apparatus according to claim 1, further comprising a bottom-end aligned portion. A chucking unit comprising a fixed part and a movable part that approaches or separates from the fixed part, and clamps and fixes the lower side of the cut tube disposed between the fixed part and the movable part. When,
A pressure unit that pushes the upper side of the cut tube toward the polishing unit;
2. The injection needle manufacturing method according to claim 1, comprising a disc-shaped grindstone that is rotatably supported, and a polishing portion that polishes the extruded upper portion of the cut tube to form a cutting edge. apparatus.   The first transporter and the second transporter are composed of the same transporter, and the transporter is disposed on the rail provided in the air passing above the aligner, the polishing device, and the honing machine. The injection needle manufacturing apparatus according to claim 1, further comprising: a grip portion that is movably mounted along the arm portion and grips an upper end of the cut tube at a lower portion via an arm portion that can be moved up and down. The injection needle manufacturing apparatus according to claim 1, further comprising a storage device that stores a predetermined number of injection needles formed by the honing machine in a storage box.

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