JP2013146881A - Method of inspecting cap, and tool for inspection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection method capable of easily and correctly inspecting a shape defect of a cap, and a tool for inspection.SOLUTION: In a method of inspecting a cap 1 for closing an opening 6 of a cap body 2 by a lid body 4 by integrally forming, through a hinge, the lid body 4 at the cap body 2 to be mounted to a container, and fitting and mounting the lid body 4 on the cap body 2, the inside of the cap body 2 is brought to negative pressure with the lid body 4 mounted to the cap body 2, and a closing state between the opening 6 of the cap body 2 and the lid body 4 is inspected by measuring the pressure.

Description

  The present invention relates to an inspection method for inspecting the quality of a cap of a container filled with a liquid such as shampoo or rinse, or a cream-like fluid such as a face wash, and an inspection jig used therefor.

  As this type of cap, for example, as shown in Patent Document 1, there is a cap in which a cap body and a lid mounted on a container are integrally molded through a thin hinge, and the lid is closed. Thus, the opening is closed by inserting the plug portion protruding from the inner surface of the lid into the opening formed in the cap body.

JP 2011-88644 A

  In the cap having the above structure, a defective shape such as a defect may occur in the plug portion due to a short shot at the time of molding, and it is necessary to inspect and remove the defective product in which the defective shape has occurred.

  Conventionally, inspection of such a defective shape relies on visual inspection, which is a work that tends to be fatigued using nerves, and there is a risk of overlooking defective products.

  The present invention has been made paying attention to such a situation, and an object thereof is to provide an inspection method capable of easily and easily detecting a cap shape defect and an inspection jig used therefor. To do.

  In order to achieve the above object, the present invention is configured as follows.

  (1) According to the cap inspection method of the present invention, a cap body is integrally formed on a cap main body mounted on a container via a hinge, and the cap body is fitted and mounted on the cap main body so that the opening of the cap main body is covered. A method for inspecting a cap that is closed by a body, in which the inside of the cap body is set to a negative pressure while the lid body is attached to the cap body, and the closed state between the opening of the cap body and the lid body is measured by measuring the pressure. It is to be inspected.

  According to the present invention, if the negative pressure in the cap body is greatly reduced, it can be considered that the opening is properly closed, and if the negative pressure in the cap body is not reduced, air can be detected at the opening closing position. It can be considered that there is an inflow and is not properly closed, and it is possible to easily inspect whether or not there is a shape defect at the closed position by the measured negative pressure in the cap body.

  (2) In a preferred embodiment of the cap inspection method of the present invention, the cap closes the opening by inserting a plug portion protruding from the lid into the opening formed in the cap body. is there.

  The shape defect such as a plug part defect is small and difficult to visually inspect, but according to this embodiment, if there is a defect such as a defect in the plug part, the negative pressure in the cap is smaller than normal. Therefore, it is possible to easily find a defective shape of the plug portion.

  (3) In the inspection jig of the present invention, the lid body is integrally formed on the cap body mounted on the container via the hinge, and the lid body is fitted and mounted on the cap body so that the opening of the cap body is covered. An inspection jig for inspecting a cap that is closed by a body, wherein a mounting portion to which a cap body in a state where an opening of the cap body is closed by a lid is mounted, and the inside of the cap body that is mounted to the mounting portion A negative hole and a vent for measuring the pressure are provided.

  According to the inspection jig of the present invention, the cap main body with the opening closed by the lid is mounted on the mounting portion of the inspection jig, and the inside of the mounted cap main body is loaded through the vent hole. Since the pressure can be measured and the pressure can be measured, the inspection method of the present invention can be suitably implemented.

  (4) In a preferred embodiment of the inspection jig according to the present invention, the cap closes the opening by inserting a plug portion protruding from the lid into the opening formed in the cap body. is there.

  Although the shape defect such as a plug portion defect is small and difficult to visually inspect, the shape defect of the plug portion can be easily found using the inspection jig of this embodiment.

  (5) In another embodiment of the inspection jig according to the present invention, the inspection jig includes a shaft portion as the mounting portion on which the cap body is mounted, and a base portion having a larger diameter than the shaft portion, One end side opening is formed in the front-end | tip of the said axial part, and the other end side opening is formed in the outer peripheral surface of the said base part.

  According to this embodiment, the cap body in a state where the opening is closed by the lid is attached to the shaft portion of the inspection jig, and the end of the attached cap body is formed at the tip of the shaft portion. A negative pressure can be measured through a vent hole that communicates the side opening and the other end side opening formed on the outer peripheral surface of the base, and the pressure can be measured.

  (6) In the embodiment of the above (5), the shaft portion has an inner shaft portion and an outer shaft portion, and is attached to a container protruding from the inner surface of the cap body between the shaft portions. There may be an annular groove part to which the boss part for mounting is attached, and the one end side opening of the vent hole may be formed at the tip of the inner shaft part.

  According to this embodiment, the mounting boss portion protruding from the inner surface of the cap body is attached to the annular groove portion between the inner shaft portion and the outer shaft portion of the inspection jig, and the inner shaft The inside of the mounting boss part can be measured under a negative pressure through a vent hole that communicates the one end side opening formed at the tip of the part and the other end side opening formed on the outer peripheral surface of the base part. it can.

  As described above, according to the present invention, it is possible to easily and easily inspect a cap shape defect.

FIG. 1 is an external perspective view of a cap in a closed state. FIG. 2 is an external perspective view of the cap in the closed state as seen from another direction. FIG. 3 is an external perspective view of the cap in the opened state. FIG. 4 is a longitudinal sectional view of the cap in the closed state. FIG. 5 is a longitudinal sectional view of the cap in the opened state. FIG. 6 is a block diagram of an apparatus using an inspection jig. FIG. 7 is a longitudinal sectional view of a main part showing an inspection state of a cap in which a shape defect has occurred. FIG. 8 is a perspective view of the inspection jig. FIG. 9 is a side view showing another example of an apparatus using an inspection jig.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an external perspective view of an example of a cap in a closed state to be inspected, FIG. 2 is an external perspective view seen from another direction, and FIG. 3 is an external perspective view in an open state. 4 is a longitudinal sectional view of the cap in the closed state, and FIG. 5 is a longitudinal sectional view of the cap in the opened state.

  As shown in these drawings, the cap 1 is formed by integrating a cap main body 2 attached to a mouth of a container filled with various fluids and a lid body 4 connected to the cap main body 2 via a hinge 3. A hinge cap formed by molding.

  The cap body 2 is formed in a double cylinder specification including an attachment boss portion 2a that is externally connected to the mouth of the container and a large-diameter outer cylinder portion 2b that surrounds the cap boss portion 2a. A bulging portion 5 protruding upward is formed at the upper portion, and an opening 6 serving as a pouring spout for fluid in the container is formed at the center of the bulging portion 5.

  The hinge 3 includes a pair of thin hinge portions 3 a that connect the upper end outer peripheral portion of the cap body 2 and the lower end outer peripheral portion of the lid body 2 at two locations in the circumferential direction, the upper wall portion of the lid body 4, and the outer cylinder of the cap body 2. An L-shaped arm portion 3c that connects the portion 2b with a pair of upper and lower thin hinge portions 3b. When the lid body 4 swings around the thin hinge portion 3a and the L-shaped arm portion 3c elastically deforms, the lid body 4 is in a closed state in which the cap body 2 is externally fitted to the cap body 2. The lid 4 is switched and held in a certain open state in which the lid 4 is largely swung upward.

  A small-diameter cylindrical plug portion 7 projects from the center of the lid body 4, and when the lid body 4 is externally fitted to the cap body 2, the plug portion 7 opens the cap body 2. 6 is inserted and brought into close contact with the opening 6 to be closed.

  Further, a part of the outer peripheral surface of the cap body 2 opposite to the hinge 3 is omitted to form a shallow concave portion 8, and a protrusion 9 facing the concave portion 8 is formed at the outer peripheral lower end portion of the lid body 4. It is easy to put a finger on the lid 4 when opening it.

  When the cap 1 configured as described above is molded with resin, troubles such as insufficient filling of the resin material (short shot) may cause, for example, a defective shape in which a part of the plug portion 7 is missing. It is necessary to sort out such defective products by inspection.

  In this embodiment, the shape defect of the cap 1 as described above is inspected as follows.

  FIG. 6 is a schematic configuration diagram of an apparatus including an inspection jig for carrying out the cap inspection method according to the present invention.

  In this embodiment, an inspection jig 10 to which the cap 1 to be inspected is attached is provided, and a vacuum device 11 such as a suction pump connected to the inspection jig 10 by piping is connected to the piping. And a pressure sensor 12.

  As shown in FIG. 8, the inspection jig 10 is resin-molded into a stepped short shaft shape having a large-diameter base portion 10a and a small-diameter outer shaft portion 10b. An inner shaft portion 10c that can be inserted into a reinforcing boss 2c provided on the inner surface of the upper wall portion of the cap body 2 is provided at the center position inside the outer shaft portion 10b. An annular groove 13 in which the mounting boss 2a of the cap 1 can be mounted is formed between the shafts 10b and 10c.

  Further, a vent hole 14 is formed at the center of the inspection jig 10, and the upper end thereof is connected to a small hole 15 formed on the upper surface of the inner shaft portion 10c, and the vent hole 14 is formed on the outer peripheral surface of the base portion 10a. Opened and connected to the vacuum device 11 by piping.

  The step portion 16 formed at the upper end of the large-diameter base portion 10a is used to place and support the lower end of the outer cylinder portion 2b of the cap body 2, and at the diagonal position, the inside and outside of the attached cap body 2 are provided. A shallow ventilation groove 17 that communicates is formed.

  At the time of inspection, as shown in FIG. 6, for example, the cap 1 in a closed state is placed on the inspection jig 10 from above, and the mounting boss 2 a of the cap body 2 is inserted into the groove 13. In this case, the depth of the groove 13 is set so that a gap is generated between the lower end of the mounting boss 2 a and the bottom surface of the groove 13.

  When the vacuum device 11 is operated with the cap in the closed state, the air in the mounting boss 2a of the cap body 2 is removed through the vent hole 14 and the small hole 15 to generate a negative pressure.

  Here, if the plug portion 7 of the lid body 4 is formed in a correct shape, the plug portion 7 is closely inserted into the opening 6 of the cap body 2, so that the mounting boss portion from which air inflow from the outside is blocked is prevented. The internal pressure of 2a further decreases.

  Further, for example, as shown in FIG. 7, if the plug portion 7 has a defect s due to poor molding, the opening 6 is not correctly sealed by the plug portion 7. In this case, the internal space of the lid body 4 communicated with the outside through a gap existing in the formation site of the hinge 3 and the internal space of the mounting boss portion 2a are communicated with each other through the defect s. The internal pressure of the mounting boss 2a is not lowered.

  Therefore, if the inside of the cap body 2 is made a negative pressure and the pressure is detected by the pressure sensor 12, and the negative pressure is sufficiently reduced within a predetermined time, it can be considered that the plug portion 7 is formed in a correct shape. If the negative pressure does not decrease sufficiently within a predetermined time, it can be considered that some form defect has occurred in the plug portion 7.

  When the inspection is completed, the negative pressure applied to the inspection jig 10 is released by, for example, opening a pipe line that connects the inspection jig 10 and the vacuum device 11, and the inspected cap 1 is removed. At this time, the inside of the cap communicates with the outside air through the ventilation groove 17 formed in the step portion 16 of the inspection jig 10, and the boss portion for attachment in the cap body 2 is removed. Since the space between 2a and the outer cylinder part 2b is atmospheric pressure, it is avoided that the lower end of the cap main body 2 adheres to the step part 16 and becomes difficult to separate.

  As described above, it is possible to inspect whether or not there is a shape defect in the closed portion of the opening 6 by the lid body 4 by making the inside of the cap body 2 negative pressure and measuring the pressure with the pressure sensor 12. Compared to the conventional example by visual inspection, the inspection can be performed easily and easily.

  It is desirable that the apparatus as described above is incorporated in a cap production line and automatically controlled, and an example in the case of automation is shown in FIG.

  In FIG. 9, 21 is an inspection section provided with the inspection jig 10 having the above-described configuration, 22 is a carry-in conveyor that places the cap 1 in a downward posture with the lid 4 closed, and intermittently conveys it, and 23 is an inspected cap. An unloading conveyor 24 for loading and transferring 1, and a handling device 24 for transferring a cap from the loading conveyor 22 to the inspection unit 21 and transferring a cap from the inspection unit 21 to the unloading conveyor 23.

  The handling device 24 includes a support bracket 27 that is moved up and down by a cylinder 26 on a movable base 25 that is reciprocated back and forth by a screw feed or the like with a fixed stroke, and the support bracket 27 has a pair of front and rear suction pads 28a at predetermined intervals. The front suction pad 28a is moved forward and backward and up and down to carry the cap from the carry-in conveyor 22 to the inspection unit 21, and the rear suction pad 28b is moved forward and backward and up and down. Thus, the cap is carried out from the inspection unit 21 to the carry-out conveyor 23.

  In this apparatus, first, the cap 1 taken out from the molding apparatus and transported to the predetermined stop position by the carry-in conveyor 22 is sucked and lifted by the front suction pad 28a, and then sent to above the inspection unit 21. As the suction pad 28a is lowered, the cap 1 is attached to the inspection jig 10 in a fixed posture.

  When the cap installation is completed, the suction is released and the suction pads 28a and 28b are returned to the upper front origin position. When the cap mounting is completed, a negative pressure is applied to the inspection jig 10 and the negative pressure in the cap is measured by the pressure sensor 12.

  The measured negative pressure in the cap after a set time from the application of the negative pressure is compared with a reference value inputted in advance, and when the measured value is reduced below the reference value, the opening 6 is correctly closed by the plug portion 7. If the measured value is not lower than the reference value and the negative pressure does not drop, there is an inflow of air at the closed location and the plug part 7 has a defective shape. It is judged that there is.

  When the inspection is finished, the suction pads 28a and 28b are lowered, the inspected cap 1 is sucked by the rear suction pad 28b, the negative pressure application to the inspection jig 10 is released, and the suction pad 28b The inspected cap 1 is removed from the jig 10 by raising.

  Thereafter, both suction pads 28a and 28b are moved rearward and lowered, and the inspected cap 1 held by the rear suction pad 28b is transferred to the carry-out conveyor 23. At the same time, the next cap 1 sucked and held by the front suction pad 28 a is carried into the inspection unit 21 and attached to the inspection jig 10.

  The transferred non-defective product of the inspected cap 1 is conveyed to the next processing line and the non-defective product collecting unit, and the defective product is sent to the defective product collecting unit.

(Other embodiments)
The present invention can also be implemented in the following forms.

  (1) In the above-described embodiment, the mounting boss 2a that is externally connected to the container is protruded from the center of the cap body 2, and the outer cylinder 2b having a large diameter is provided outside thereof. Although the cap 1 is illustrated, the cap 1 can also be used for the inspection of the closing function in the cap of the single cylinder specification in which either the outer cylinder part 2b or the mounting boss part 2a is eliminated.

  (2) In the above embodiment, the cap 1 having a specification configured to close the opening 6 by inserting the plug portion 7 projecting from the lid body 4 into the opening 6 of the cap body 2 is illustrated. It can also be used for inspection of a closing function in a specification that does not include the portion 7, for example, a cap having a specification that closes the opening 6 by pressing and contacting the inner surface of the central portion of the lid body 4 to the tip of the bulging portion 5.

  (3) Although the inspection apparatus exhibits its features effectively by being automated, it can be implemented in the following simple form for reducing the labor of the operator. For example, a blue lamp indicating a non-defective product is turned on based on detection that the internal pressure of the cap measured by the pressure sensor 12 has fallen to a reference value or less, and detection that the measured internal pressure of the cap does not drop to a reference value or less. A red lamp indicating a defective product is turned on based on this, and the operator manually attaches and removes the cap 1 to the inspection jig 10 while the operator manually separates the good product and the defective product based on the lamp display. It can also be implemented in various forms.

DESCRIPTION OF SYMBOLS 1 Cap 2 Cap main body 2a Attachment boss | hub part 2b Outer cylinder part 3 Hinge 4 Lid body 6 Opening 7 Plug part 10 Inspection jig | tool 11 Vacuum apparatus 12 Pressure sensor

Claims (6)

A cap inspection method for closing a cap body opening with a lid body by integrally forming a lid body on a cap body mounted on a container via a hinge and fitting the lid body to the cap body.
With the lid attached to the cap body, the inside of the cap body is set to a negative pressure, and the closed state of the opening of the cap body and the lid body is inspected by measuring the pressure.
A method for inspecting a cap. The cap closes the opening by inserting a plug portion protruding from the lid into the opening formed in the cap body.
The cap inspection method according to claim 1. An inspection jig for inspecting a cap that closes the opening of the cap body with the lid body by integrally forming the lid body on the cap body mounted on the container via a hinge and fitting the lid body to the cap body. Because
A mounting part to which the cap body in a state where the opening of the cap body is closed with a lid,
A negative pressure is applied to the inside of the cap body mounted on the mounting portion, and a vent hole for measuring the pressure is provided.
Inspection jig characterized by this. The cap closes the opening by inserting a plug portion protruding from the lid into the opening formed in the cap body.
The inspection jig according to claim 3. A shaft portion as the mounting portion to which the cap body is mounted, and a base portion having a larger diameter than the shaft portion;
One end side opening of the vent hole is formed at the tip of the shaft portion, and the other end side opening is formed on the outer peripheral surface of the base portion.
The inspection jig according to claim 3 or 4. The shaft portion has an inner shaft portion and an outer shaft portion, and an annular groove portion between which the shaft portion is mounted with a boss portion for mounting on a container projecting from the inner surface of the cap body. And
The one end side opening of the vent hole is formed at the tip of the inner shaft portion.
The inspection jig according to claim 5.

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