JPH07218377A - Method and apparatus for inspecting presence or absence of pinhole of baglike product of thin synthetic resin or rubber film - Google Patents

Abstract

PURPOSE:To simplify steps and to improve an inspecting efficiency of a pinhole by disposing a pair of meshlike pressers on an inspection station, expanding gloves via the pressers, and sensing an ultrasonic wave generated from leakage air. CONSTITUTION:A plurality of inspecting bases 11x are placed on circulating rails, a compressed air intake, a glove chucking unit, pressers 200 each having a mesh opening of 3-l0m, etc., are assembled in the base 11x, and the bases 11x are intermittently moved. First, after a glove 190 is mounted by an operator, and the bases 11x are transferred to an inspection station. The air is diffused in the glove 190, expanded between a pair of the pressers 200, and presence or absence of a pinhole is checked by ultrasonic detectors 130, 132, 135, 136. Thus, a palm, back and finger part of the glove 190 are inspected at once. A malfunctioned glove is removed, and a non-defective glove is recovered by a non-defective glove recovering unit 160.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention inspects pinholes in bag-like products made of thin synthetic resin or rubber film or film, such as latex surgical gloves, blood transfusion and infusion packs. A method and apparatus.

[0002]

2. Description of the Related Art Products such as latex gloves and blood transfusion and infusion packs that cause pinholes, air bubbles, and other foreign matter may cause an unexpected and dangerous danger to the user. It will be. Especially in recent years, as medical technology has advanced, the frequency of use of these products has increased rapidly, and as a result, accidents due to their defects tend to occur more frequently, which requires more rigorous inspection than ever before. ing.

Therefore, the applicant of the present application previously filed Japanese Patent Application No. 5-
No. 275316 proposes a method and apparatus for pinhole testing of these products using ultrasonic waves. The proposal is based on the knowledge that when a product such as gloves has a pinhole, when air is blown into the product to inflate it, ultrasonic waves are generated with the jet of air leaking from the pinhole. In particular, by monitoring ultrasonic waves with a frequency of 38 to 42 kHz, the presence or absence of pinholes can be reliably detected.

However, when the product is a glove or the like, it is inflated with air, firstly the pinholes of the palm and the instep are inspected, and then the palm and the instep are made of a plate or the like to surely detect the pinhole between the fingers. It was structured so that it could be pinched and compressed with the fingers opened. Therefore, even if the inspection device is configured as a conveyor system, one glove inspection requires two inspection stations, and another glove cannot be inspected until one glove passes through the two inspection stations. Therefore, there is a problem that not only the apparatus becomes complicated but also the inspection takes time.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to make an apparatus simpler and to perform an inspection in one step, which is efficient. It is an object of the present invention to provide an improved method and apparatus for performing inspection.

[0006]

The above object of the present invention is to:
A large number of ultrasonic detectors are arranged so as to surround a product that is attached to a known fixture and carried into a predetermined inspection station, and a product pressing device having a mesh-like or lattice-like pressing portion is provided in the inspection station. This is achieved by providing a pair of them so as to face each other, and when inflating the product, the product can be inflated while being sandwiched by the pressing tool. Thus, this pressing tool is provided so as to be able to move forward and backward or open and close toward the product attached to the mounting tool and carried into the predetermined inspection station.
Further, it is desirable that the relative position between the product pressing part of the pressing tool and the pressed part of the product to be inspected is changed during the inspection period.

When the product is a rubber glove, this ultrasonic detector is provided with nine or more glove surroundings so that the entire surface of the glove can be inspected without blind spots. It is desirable to arrange them outside the palm surface and the instep surface, between the fingers, and the side surfaces on the thumb side and the little finger side of the palm.

The frequency of the ultrasonic detector generated by the jet flow from the pinhole depends on the hardness, elasticity and thickness of the material constituting the product, the size of the pinhole, the composition of the gas supplied inside, the pressure and the temperature. However, it is usually sufficient to detect ultrasonic waves at 40 KHz unless the product is very special.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings. 1 is a front view showing an embodiment of an inspection apparatus according to the present invention, FIG. 2 is a plan view of the apparatus shown in FIG. 1, FIG. 3 is a sectional view thereof, and FIG. 4 is a perspective view showing an example of a product pressing tool. 5 is a side view showing another example of the product pressing tool, FIG. 6 is a plan view of the pressing tool shown in FIG. 5, and FIG. 7 is a front view thereof.

The inspection apparatus 100 shown in FIG. 1 to FIG.
Since it is a dual type in which exactly the same mechanism is arranged in parallel, only one of them will be described here. Therefore,
In the figure, 101 is a base, 102 is a door, 103 is a front barrier, and 110 is an oval circular orbit provided on the upper surface of the base 100, 111, 112, 113, 114, 11
5 and 116 (hereinafter, any one of them is referred to as 11X)
Is an inspection table movably provided on the circulation orbit 110,
Reference numeral 20 is an inspection table rotary propulsion device for propelling the inspection table 11X along the arc portion of the elliptical circulation orbit 110, and 121, 123 and 125 are drive arms 122, 124 and 126, respectively.
A test table linear propulsion device for propelling the test table 11X along the straight line portion of the circulation track 110 by reciprocating the drive arms 122, 124 and 126.
Reference numeral 6 denotes an ultrasonic wave detector provided at an inspection table station corresponding to a position where the inspection table 113 is stopped in FIG.
Is a temporary product removing device, 150 is a defective product removing device, 151
Is a defective product storage box, 160 is a good product storage device, 161 is a good product storage box, 170 is a controller for starting and stopping, 180 is a device for controlling the operation of the entire device, 181 is an operation panel, 190
Is a glove, and 200 is a product pressing device.

1 to 3 show an outline of the entire apparatus, and details of portions which are not directly related to the present invention are omitted. On the base 101, an elliptical circulation orbit 11
0 is provided, and two sets of inspection devices are provided along the circulation orbit 110. Since these two sets of inspection devices have the same shape, only one of them is given a reference numeral.

Inspection tables 111 to 116 are movably mounted on the circulation track 110. These are equipped with a compressed air intake, a well-known chuck device capable of holding the glove in an airtight state in a swelled state, a pressing tool 200 and other accessories, an inspection table rotation propulsion device 120, an inspection table linear propulsion device 121, It is driven by 123 and 125 and intermittently moves on the circulation orbit 110.

On the inspection table 11X, a worker attaches gloves 190 at a position 111, and the inspection table rotation propulsion device 120 is installed.
Is propelled to the position 112. Next, the inspection table 11X is transferred to the position 113 of the inspection table station by the inspection table linear propulsion device 121.
The inspection table linear propulsion device 121 has a drive arm 122 that reciprocates along the linear portion of the circulation path 110. Drive arm 12
2 indicates the position 1 indicated by the alternate long and short dash line from the position indicated by the solid line
It reciprocates between 22a and propels from the position of the inspection table 11X112 to 113.

At this inspection table station, gloves 1
Air is blown into 90, the glove 190 is inflated between a pair of pressing tools 200 described later, and the ultrasonic detector 130
Through 136, the presence or absence of pinholes is checked. That is, if there is a pinhole in the glove 190, ultrasonic waves are generated when air leaks from the pinhole. Therefore, the presence or absence of the pinhole is checked by these ultrasonic wave detectors 130 to 136.

The inspection table 11X is then intermittently moved to the positions 114, 115 and 116 by the inspection table linear propulsion device 123 in sequence. Inspection table linear propulsion device 123
Has a drive arm 124, and the drive arm 124 reciprocates between a position indicated by a solid line and a position 124a indicated by a chain line, and sequentially propels the inspection table 11X from a position 113 to a position 116.

The inspection table 11X is the first one of the drive arm 124.
The stroke is sent from 113 to 114, where the temporary removal device 140 prepares air removal and preparation for removal from the chuck, and the next stroke is sent to 115 where the defective product removal device 150 removes defective products. Are stored in the defective product storage box 151.

In the next stroke, the inspection table 11X is sent to 116, where the good product collecting device 160 collects the good products and stores them in the good product storage box 161. Thus, the vacant inspection table 11X is replaced with the inspection table linear propulsion device 12
5 further to the left and then used by the inspection device shown in the upper half of FIG. 2 to perform the next glove inspection in a process similar to that described above.

As shown in FIGS. 2 and 3, a large number of ultrasonic detectors 130 to 136 are arranged so as to surround the inflated glove 190, and pinholes in any place of the glove 190 are not missed. It is configured so that it can be detected. Normally, it should be placed at a total of 9 places, two places above and below the palm, two places above and below the instep, three places in the direction of the finger, and one on each side of the thumb and little finger. Is recommended.

The frequency and intensity of the generated ultrasonic wave vary depending on the material and thickness of the glove 190, air pressure, temperature, size and shape of the pinhole, and the like. It is recommended to use one with a detection band of ˜42 kHz. With this ultrasonic sensor, it is possible to detect pinholes practically completely.

The gist of the present invention is, as shown in FIG. 3, that when the glove 190 is inflated, the glove 190 is inflated while being sandwiched between the pressing tools, and the gloves 190 of the pressing tool. The surface that comes into contact with is to have a mesh shape or a grid shape.

An embodiment of the product pressing device is shown in FIG. In the figure, 200 is a wire mesh type product pressing device, and 2
Reference numeral 01 is a substrate attached to the inspection table 11X, 202 is a table that slides on the substrate 201, 203 is a wire mesh type pressing tool attached to the slide table 202, 20
Reference numeral 4 is a guide for the slide table 202, and 205 is an air cylinder for moving the slide table 202 forward and backward along the guide 204.

Although only one device is shown in FIG. 4, two product pressing devices 200 are provided so as to face each other with a glove 190 attached to the inspection table 11X interposed therebetween, and an air cylinder. The wire mesh of the pressing tool 203 moves forward and backward toward the glove by 205, and reciprocates between a restraining position where the inflated glove can be pressed and pinched and a retracted position where the inflated glove can be released. Configure to get. The pair of pressing tools 203 presses the palm and the instep of the inflated glove during the inspection to expand the gloved finger and ensure the detection of the pinhole on the crotch of the finger.

During the inspection, it is recommended to move the air cylinder 205 back and forth a minute distance to rub the glove to be inspected or change the inner pressure of the glove. By doing so, the relative position between the pressing surface of the pressing tool and the glove is changed, and the glove is deformed to open and detect a pinhole blocked by a thin film, foreign matter, wire of wire mesh, etc. be able to.

As the net of the pressing tool 203, a wire net other than stainless steel or a synthetic resin net such as nylon or polyethylene can be used. It is recommended that these nets use the thinnest possible wire and that the mesh size is 3 to 10 mm, preferably 5 to 7 mm.

A second embodiment of the product pressing device is shown in FIGS. This is a product pressing device 300 having rollers arranged in a parallel lattice. In the figure, 301 and 302 are side plates, 303 is an air cylinder for advancing and retracting, 30
4 is a swinging air cylinder, 305 is a connecting cullet whose end portions are coupled to the side plates 301 and 302, respectively, and a substantially central portion is coupled to the tip of the rod of the air cylinder 303, and 306 is an end portion thereof. Side plates 301 and 302
The connecting rods 307 to 309, which are connected to the front end of the rod of the air cylinder 304, are roller type pressing members rotatably provided between the side plates 301 and 302, respectively.

The pressing device 300 is also provided on the inspection table 11X so as to sandwich the glove to be inspected, and the air cylinder 303 is extended to press the inflated glove 190 by the roller type pressing tools 307 to 309. It is a thing. When using this pressing device, the air cylinder 304 is operated during the inspection, the device is rocked up and down, and the glove 190 is rubbed to further ensure the inspection.

[0027]

Since the present invention is constructed as described above, it is possible to inspect a product in one step with a single inspection table station, thus reducing the equipment cost and operating cost of the inspection device. it can.

The structure of the present invention is not limited to the above embodiment, and the pressing tool may have a structure that can press the glove surely with the minimum contact area. , Parallel wires may be used, and when it is formed into a lattice, it may be a vertical lattice type instead of the above horizontal lattice, and the members constituting the lattice are parallel flat plates instead of rollers. The glove may be configured to be pressed by the edge, and the design can be freely modified within the scope of the object of the present invention, and the present invention includes all the modifications.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an inspection apparatus according to the present invention.

2 is a plan view of the device shown in FIG. 1. FIG.

FIG. 3 is a cross-sectional view of the device shown in FIG.

FIG. 4 is a perspective view showing an example of a product pressing device.

FIG. 5 is a side view showing another example of the product pressing device.

FIG. 6 is a plan view of the pressing device shown in FIG.

FIG. 7 is a front view of the pressing device shown in FIG.

[Explanation of symbols]

 100 --- Inspection device 110 --- Circular orbit 111-116 ... Inspection table 120 --- Inspection table rotation propulsion device 121, 123, 125 ...- Inspection table Linear propulsion device 130-136 ··· Ultrasonic detector 140 ···· Product temporary removal device 150 ··· Defective product removal device 160 ·・ ・ ・ ・ ・ ・ Good product collection device 170 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Starter and stop controller 180 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Control device 190 --- Gloves 200 --- Product pressing device 201 --- Substrate 202 --- Slide table 203 --- ...... Wire mesh type pressing tool 204 ・ ・ ・ ・ ・ Guide 205 ・ ・ ・ ・ ・ Air cylinder 00 ... Product pressing device 301, 302 ... Side plate 303, 304 ... Air cylinder 305, 306 ... Connection stem 307-309. ..... Roller type pressing tool

Claims (12)

[Claims] 1. A bag-shaped product made of a thin synthetic resin or a rubber film to be inspected for defects is airtightly mounted by covering a holder adapted to the opening with a gas slightly higher than atmospheric pressure. A method of detecting the presence or absence of pinholes by detecting the ultrasonic waves generated due to the leakage of the internal gas by enclosing and inflating the product, and the product is a mesh or lattice that is provided facing each other with an appropriate interval. The inspecting method, wherein the pinhole inspection is performed in a state in which the glove is inflated between a pair of pressing members having a pressing surface and the glove is pressed by the pressing members. 2. The inspection method according to claim 1, wherein the pressing tool presses the product with a net having an eye opening of 3 to 10 mm. 3. The inspection method according to claim 1, wherein the pressing tool presses the product by a plurality of parallel rollers arranged in a parallel lattice pattern. 4. The relative position between the product pressing member portion of the pressing member and the inflated product is changed during the inspection period.
The inspection method according to any one of 1 to 3. 5. The frequency of ultrasonic waves detected is 38 to 42 kH.
The inspection method according to any one of claims 1 to 4, wherein z is z. 6. The gas sealed inside the product is air,
The inspection method according to claim 1, wherein the pressure is 0.1 kg / cm ² or more and 1.2 kg / cm ² or less. 7. The pressure of the air sealed inside the product is 0.12 kg.
The inspection method according to claim 6, which is not less than / cm ^{2 and not} more than 0.7 kg / cm ² . 8. The pressure of the air enclosed inside the product is 0.2 kg.
The inspection method according to claim 6, which is not less than / cm ^{2 and not} more than 0.5 kg / cm ² . 9. A bag-shaped product made of a thin synthetic resin or a rubber film to be inspected for defects is airtightly mounted by covering a holder fitting in the opening with a gas slightly higher than atmospheric pressure inside. A device for inspecting for the presence or absence of pinholes by detecting the leakage by enclosing and inflating, and equipped with a base and a holder to which each product to be inspected is attached in an airtight manner. A plurality of inspection tables provided so as to be able to circulate along a circulation path, an inspection table propulsion device that circulates the inspection table along the circulation path on the base, and a mesh-like or lattice-like pressing part, respectively. And a glove attached to the inspection table that has reached the inspection station and has approached each other, and is sandwiched by a predetermined interval. Was inflated At this time, a pair of pressing tools that can reciprocate between a restraining position where the gloves can be pressed and pinched and a retracted position where they can release the inflated glove, and a pair of pressing tools approach and open each other. A device to open and close the pressing tool, a device that supplies compressed air of a predetermined pressure to the gloves attached to the inspection table that arrived at the inspection station, and a plurality of devices that surround the gloves attached to the inspection table that arrived at the inspection station When the ultrasonic wave detector and the ultrasonic wave generated by the air flow leaking from the pinhole of the product passing through the front of the ultrasonic wave detector are judged to be defective, the product is removed from the holder. The above-mentioned pinhole inspection device, comprising: a device for removing the non-defective product from the holder and a device for controlling the operation of each component. 10. The glove pressing portion of the pressing tool has an opening 3
The pinhole inspection device according to claim 9, which has a mesh structure of about 10 mm. 11. The pinhole inspection device according to claim 9, wherein the portion of the pressing tool that presses the glove has a parallel lattice structure including rollers that are parallel to each other. 12. The pinhole inspection device according to claim 8, wherein the ultrasonic detector is an electrostrictive element capable of detecting ultrasonic waves having a frequency of 38 to 42 kHz.