JPS6128472B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a continuous injection needle grinding machine that continuously and automatically grinds the tips of injection needles.

(Prior art) Conventionally, injection needles are ground by cutting 100 to 500 needle tubes A to a fixed size in a row and sandwiching them between two plate-shaped clamping jigs from both sides, as shown in Fig. 6. Clamp it with the upper end protruding, set it on the table of a general-purpose cylindrical grinder, and grind the tip to an acute angle in several cuts while moving the table left and right. Roll the needle tube 4° to 6° to the right or left by sliding it slightly left and right, and tilt the clamping jig slightly toward you to remove the needle tube A.
Two-sided grinding was performed on the tip of the machine, once on each side.

(Problems to be Solved by the Invention) However, with this device, it is necessary to align the needle tube A, insert it into the jig, center it using a cylindrical grinder, and change the position of the clamp for two-sided polishing. The work of taking out the finished product after grinding is very complicated and inefficient, and the grinding work requires a skilled worker.

(Means for Solving the Problem) Therefore, the present invention divides the grinding work of the injection needle into multiple steps and arranges them around the circumference of the rotary table, so that the entire grinding work process can be completed with one rotation of the rotary table. A device that grinds cylindrical needle tubes A and manufactures injection needles by fully automatically performing everything from arranging the needle tubes A to winding up the ground product to improve efficiency and achieve high-precision grinding. , a belt-shaped adhesive tape B to which a predetermined number of tapes are intermittently attached to the needle tube A with the tip thereof exposed and aligned with the axis of the needle tube A in the width direction; and a tape B to which the needle tube A is adhered.
is wrapped around the outer circumference of the rotary table, and is attached to the rotary table 1 and the tape B, which are sequentially rotated to the installation positions of polishing wheels and deburring wheels, which are installed at equal center angles around the table. Clamp the part of the attached needle tube A other than the part that will be affixed to the tape, temporarily press and fix it to the outer circumferential surface of the table, or rotate the needle tube A slightly to the left and right in the circumferential direction of the table to rotate the needle tube A. The same number of clamp arms 3 as there are polishing wheels and deburring wheels are provided on the rotary table 1, and around the rotary table there are polishing wheels 5 and deburring wheels 6 whose depth of cut can be adjusted to complete the grinding and deburring process. This invention provides a continuous injection needle grinding machine equipped with a winding device 7 for winding up an adhesive tape B with a needle tube A attached thereto.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. A hopper 8 that accommodates a large number of needle tubes A cut to a fixed size is provided, and at the lower end outlet of the hopper 8,
A feeding drum 9 that rotates in contact with the outer periphery is provided, and needle tube housing grooves 10 are provided on the outer periphery of the drum for arranging needles in fixed groups and at fixed intervals in the axial direction.

A guide 15 is provided at the lower end outlet of the feeding drum 9, through which the needle tube A fitted in the needle tube housing groove 10 of the drum moves while being held down.

At the end of the guide 15, there is a roller (shown in FIG. 1 but not numbered) that presses and attaches only the needle tube A fitted in the needle tube housing groove 10 of the feeding drum 9 to the adhesive tape B. ) has been established.

Next, the rotary table 1 is intermittently rotated by 1/12 of the circumference by the power of a motor, etc., and a clamp device 2 is provided at each 1/12 of the circumference of the rotary table 1. As shown in FIGS. 1 to 3, each clamp device is fixed to the rotating shaft 12 of the rotating table 1, that is, it rotates integrally with the rotating table, and each clamp arm holder is fixed to the rotating shaft 12 of the rotating table 1. A hinge 11a is provided near the supporting end of the tool 11, respectively.
is provided, and each clamp device is configured to descend using the hinge as a fulcrum, and near the other end of each clamp arm holder 11, a needle tube A is crimped to the outer peripheral surface of the rotary table 1 or rolled from side to side. Clamp arms 3 each having an L-shaped cross section are provided.

Each clamp arm 3 is provided in the diametrical direction of the rotary table so that it can be pressed or released by a clamp cylinder 2a.

The pressure for crimping the needle tube A with this clamp cylinder varies depending on the diameter of the needle tube, but it is about 19G for a needle tube with a diameter of 1.1, and about 26G for a needle tube with a diameter of 0.6.

Furthermore, each clamp arm 3 descends avoiding the guide roll 17 for winding up the adhesive tape that has been ground and deburred, and after passing through the guide roll 17, is further guided to guide the adhesive tape to the rotary table. After passing through the rolls 16, up and down cylinders 2b are respectively provided for raising again.

These vertical cylinders 2b are provided with one end on the bottom surface of the rotary table 1 and the other end on the top surface of each clamp arm holder 11.

Further, the width of the portion of each clamp arm 3 that presses against the rotary table is formed to be slightly wider than the needle tubes A of a certain group adhered to the adhesive tape B.

On the bottom of the rotary table 1, each clamp arm 3 is provided on both sides of each clamp arm holder 11.
A lateral movement cylinder 2c is provided for moving the needle tube A to the left and right and rolling the needle tube A pressed against the rotary table 1 by 4 degrees to 6 degrees. Stoppers 4 for finely adjusting the movement width are provided near these lateral movement cylinders 2c.

Also, when the upper surface of the outer peripheral end of the rotary table 1 or the upper end of the needle tube A is being ground or deburred, the rotary shaft 1
A push plate 14 is provided to prevent escape in two directions, and a receiving plate 13 is provided on the lower surface of the outer peripheral end of the rotary table 1 so that a certain group of needle tubes A bonded to adhesive tape B are placed on the same surface. There is.

Around the rotary table 1, six grinding wheels 5 and two deburring wheels 6 are provided at 1/12 of the circumference independently of the rotary table 1.

These grinding wheels and deburring wheels are provided so as to be movable and tiltable in the direction of the rotation axis of the rotary table, so that the angle of cut and the amount of cut can be adjusted.

Further, near the rotary table 1, there is a guide roll 16 that guides the adhesive tape B along the outer periphery of the rotary table, and near the guide roll, the adhesive tape B that has been ground and deburred is guided to the winding device 7. A guide roll 17 is provided.

The winding device 7 is configured to be driven in synchronization with the rotation of the rotary table 1 by a power source such as a motor.

(Function) Next, to explain the function of the present invention, a large number of needle tubes A cut to a fixed size are stored in the hopper 8, and the feed drum 9 rotates with its outer periphery in contact with the lower end outlet of the hopper 8. Needle tube accommodation grooves 10 are drilled in groups at regular intervals, and the needle tube A fitted in the needle tube accommodation grooves 10 is moved while being pressed by a guide 15 along its outer periphery as the feed drum 9 rotates.
Next, the adhesive tapes B drawn out along the outer periphery of the feed drum 9 are adhered in groups at regular intervals, and are supplied to one location on the outer periphery of the rotary table 1 which is rotated by power. wrapped around the outer circumference of the After being wound almost one full turn, it is passed through the guide roll 17 to the winding device 7.
The grinding wheel 5 is placed outside the circumference of the rotary table 1 at a position dividing the circumference into 12 equal parts.
Two leather deburring wheels 6 are provided, and each wheel is arranged so that the cutting angle and cutting amount can be adjusted.

In this way, the circumference is divided into 12 equal parts, and the position where the adhesive tape B starts along the outer periphery of the rotary table 1 via the guide roll 16 is the first step, and the tape is placed sequentially up to the 12th step, and the position after the 11th step is the first step. A guide roll 17 for winding up the adhesive tape is provided, and the needle tube A that has been ground is wound onto the winding device 7 through the guide roll 17 while being stuck to the adhesive tape B. The 12 processes on the outer periphery of the rotary table 1 are as follows.

1st process...Clamp arm raised 2nd process...Clamp completed 3rd process...1st cutting depth grinding on one side 4th process...2nd cutting depth on one side 5th process...3rd cutting depth on one side Grinding 6th process... Quaternary cut grinding on one side 7th process... Right grinding on two sides 8th process... Deburring 9th process... Left grinding on two sides 10th process... Deburring 11th process... Opening and lowering of the clamp arm 12th process...Passing below the clamp device Below the rotary table 1 is the central rotating shaft 12.
An L-shaped clamp arm 3 bent upward is supported at the tip of a clamp arm holder 11 that supports the base of the rotary table 1 at the outer circumference of the rotary table 1 so as to be freely removable and removable. are connected by a clamp cylinder 2a, and the clamp arm 3 clamps or releases a group of needle tubes A arranged on the outer periphery of the rotary table 1 on an adhesive tape by the expansion and contraction of the clamp cylinder 2a. 12 radially arranged 2.
Clamping is completed at the position of the second step in FIG. 1, and as the rotary table 1 rotates in the direction of arrow P, one-sided grinding is carried out sequentially from the third step to the sixth step as shown in FIG. Complete the cut.

Next, this clamping device 2 moves slightly in the circumferential direction of the rotary table 1 while clamping the needle tube A, and rotates the needle tube A a little clockwise or counterclockwise to tighten the tip of the needle tube A from both the left and right sides. In order to perform two-sided grinding, facing both sides of the clamping device 2,
A pair of lateral movement cylinders 2c attached to the rotary table 1 and a stopper 4 for regulating the amount of lateral movement of the clamping device 2 are provided close to the lateral movement cylinders 2c, and the stoppers 4 have a stop position that can be adjusted. An adjustment screw 4a is provided for this purpose. This lateral movement device is operated at two locations before entering the 7th and 9th steps, and these two locations are operated in opposite directions to form the 7th and 9th steps as shown in Figure 5. as,
Grind the tip of needle tube A a second time on the right and left sides respectively.
Then, in the eighth and tenth steps following the completion of the second grinding, burrs are removed using a leather deburring wheel 6 to complete the entire grinding process.

Next, the clamp device 2
A hinge 11a is provided near the supporting end of the rotary shaft 12 of the rotating shaft 12, and a vertical cylinder 2b is provided outward from the hinge 11a to connect the rotating rubber 1 and the clamp arm holder 11, and the clamp device 2 passes through the 10th step. Then, the clamp cylinder 2a is activated to move the clamp arm 3 away from the outer periphery of the rotary table 1 to open the clamp, and then move to the position of the 11th step.
That is, before reaching the winding guide roll 16,
First, the clamp cylinder 2b operates to bend the clamp device downward from the hinge 11a as shown by the two-dot chain line in FIG. In this way, with the clamp device 2 lowered, the adhesive tape B passes through 12 steps from the winding position to the supply position, and then returns to the position of the first step, that is, the adhesive tape B
At the position where the needle tubes A have passed the guide roll 15 that adheres the group of needle tubes A and supplies them to the outer periphery of the rotary table 1,
The vertical cylinder 2b pulls up the clamp device, and in the second step position, the clamp cylinder operates, attracting the group of needle tubes A to the outer periphery of the rotary table 1, completing the clamping, and thereafter, the rotation of the rotary table 1. Therefore, the third step and subsequent steps are ground as described above.

Further, a receiving plate 13 is provided below the outer peripheral edge of the rotary table 1 to support the lower end of the needle tube A, and a push plate 14 is further provided at the upper outer peripheral edge of the rotary table 1 to firmly support the needle tube A during grinding. Sometimes it is set up.

In the above explanation, the clamp cylinder 2a, the vertical cylinder 2b, and the lateral movement cylinder 2c can be used with either hydraulic pressure or pneumatic pressure, and the means for operating these cylinders at a desired location for a desired time are as follows: It uses commonly used limit switches, photoelectric switches, proximity switches, etc. to detect the location of activation and activates the solenoid valve that opens and closes the circuit. If necessary, a timer can also be used to control the time. Since this is a common-sense application of a known technique, detailed explanation will be omitted.

(Effects of the Invention) Since the present invention is as described above, four processes of one-side grinding, two processes of double-face grinding of the tip, and two processes of deburring are arranged on the outer peripheral edge of the rotary table 1, and While the grinding wheel 1 rotates, all processes are automatically completed one after another, and the adhesive tape B is continuously wound up by the winding device 7 while the grinding wheel 5 and the grinding wheel 5 in each process are wound up continuously. The deburring wheel 6 can be positioned accurately, and the quality suitable for each process can be selected, resulting in high grinding accuracy.High quality injection needles can be produced labor-savingly and can be supplied at a low price, achieving extremely effective and appropriate effects. It is something to play.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
The figure is a plan view, Figure 2 is an enlarged cross-sectional view taken along the line Separate figures, FIG. 5, are views showing a state in which two-sided grinding is performed, A is a side view, B is a front view, and FIG. 6 is a perspective view showing a conventional grinding method. A...needle tube, B...adhesive tape, 1...rotary table, 2...clamp device, 2a...clamp cylinder, 2b...vertical cylinder, 2c...lateral movement cylinder, 3...clamp arm, 4 ... Stopper, 4a ... Adjustment screw, 5 ... Grinding wheel, 6 ... Deburring wheel, 7 ... Winding device,
8...Hotsupa, 9...Feeding drum, 10...
Needle tube accommodation groove, 11...Clamp arm holder, 11
a... Hinge, 12... Rotating shaft, 13... Receiving plate,
14... Push plate, 15... Guide, 16, 17...
...Guidance roll.

Claims (1)

[Claims] 1. In an apparatus for manufacturing a syringe needle by grinding a cylindrical needle A, the tip of the needle A is exposed, its width direction is aligned with the axis of the needle A, and a predetermined number of needles are intermittently pasted. Belt-shaped adhesive tape B
Then, the tape B to which the needle tube A is attached is wrapped around the outer circumference of the rotary table, and the tape B is sequentially rotated to the installation position of the polishing wheel and deburring wheel, which are installed at equal center angles around the table. The rotary table 1 and the part of the needle tube A attached to the tape B other than the part that is attached to the tape are clamped and temporarily crimped and fixed to the outer circumferential surface of the table. Clamp arms 3 for rotating the needle tube A, which has been slightly rotated, are provided on the rotary table 1 in the number of polishing wheels and deburring wheels. A continuous injection needle grinding machine characterized by being provided with a wheel 6 and a winding device 7 for winding up an adhesive tape B with a needle tube A that has been ground and deburred.