JP3003750U - Cap mounting device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a cap mounting device that can prevent the container from rocking when the cap is screwed on and prevent inconveniences such as screwing on the cap. [Structure] A cap mounting device for screwing a cap 4 while suspending a flange portion 1b of a container 1 by a suspension mechanism, at a position in contact with a bottom portion 1c of the container held by a suspension mechanism 12, A cushion base 19 is provided which is in contact with the bottom portion of the container when the cap is screwed by the cap screwing mechanism.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cap mounting device suitably used for mounting a pre-screw cap such as a plastic cap on a plastic container.

[0002]

[Prior art]

 Conventionally, plastic containers made of plastic materials such as biaxially stretched polyethylene terephthalate resin have been widely adopted because of their durability and light weight. When installing a pre-screw cap, such as a plastic cap, on which such a plastic container is pre-threaded, add the top load and tighten the pre-screw cap with the spinning headset of the capping machine to the specified tightening. Tighten so that torque (capping torque) can be obtained.

FIG. 4 shows a cap mounting device described in Japanese Patent Publication No. 5-30712 as an example of a conventional cap mounting device. This cap mounting device includes a suspension mechanism 5a for holding the plastic container 1 having a threaded portion at the mouth and a flange portion 1b at the neck portion in a suspended state by supporting the flange portion 1b. A cap screwing mechanism 8 for screwing a pre-screw cap 4 to the mouth of the plastic container 1 held by the suspension mechanism 5a, and a lower surface of the flange portion 1b of the plastic container 1 provided on the suspension mechanism 5a. And a rotation stop blade portion 6 for locking the plastic container 1 in the cap screwing direction.

According to this cap mounting device, the plastic container 1 is supported by the suspension mechanism 5a on the lower surface of the flange portion 1b, and the cap screwing mechanism 8 is applied to the mouth portion of the plastic container 1 while the bottom portion is floating. The attached pre-screw cap 4 is rotated and screwed in the closing direction.

[0005]

However, the above-described conventional cap mounting device is a system in which the plastic container 1 is suspended by the suspension mechanism 5a, and the cap is screwed while the bottom portion is floated. The suspended plastic container 1 may swing. Therefore, cap screwing may be performed in a state where the plastic container 1 is inclined, and as a result, the flange portion 1b of the plastic container 1 does not sufficiently engage with the rotation stopping blade portion 6 of the suspension mechanism 5a and the cap screwing is performed. At that time, the plastic container 1 may rotate, and a sufficient capping torque may not be obtained, or the cap may be diagonally worn.

The present invention has been made in view of the above circumstances, and provides a cap mounting device capable of preventing the container from swinging when the cap is screwed and preventing inconvenience such as improper screwing of the cap. It is an object.

[0007]

[Means for Solving the Problems]

 The cap mounting device of the present invention includes a suspension mechanism that holds a plastic container having a threaded portion at the mouth and a flange portion at the neck portion in a suspended state by supporting the flange portion, and a suspension mechanism. A cap screwing mechanism for screwing a pre-screw cap to the mouth of the plastic container held by the hanging mechanism, and a cap screwing mechanism for the plastic container that is provided in the suspension mechanism and is locked to the lower surface of the flange part of the plastic container. In a cap mounting device provided with a rotation stop blade portion for preventing rotation in a wearing direction, a cap screw is provided at a mouth portion of the plastic container at a position in contact with a bottom portion of the plastic container held by the suspension mechanism. When the pre-screw cap is screwed by the attaching mechanism, a cushion base that comes into contact with the bottom of the plastic container is provided.

Further, the cushion base does not sink due to the weight of the plastic container in the pre-screw cap screwed state, and is urged upward by the spring having an elastic force that sinks when the top load of the cap screwing mechanism is applied. You can use the existing one.

[0009]

[Action]

 The cap mounting device of the present invention is such that when the plastic screw cap is screwed to the mouth of the plastic container by the cap screwing mechanism, the plastic screw cap is attached to the bottom of the plastic container held by the suspension mechanism. Since the cushion base that comes into contact with the bottom is provided, the flange of the plastic container with the cap screwed on is supported by the suspension mechanism, and the suspension blade is suspended with the rotation stop blade locked. The bottom of the container is held in contact with the cushion base, and the swing of the plastic container is suppressed.

In addition, as a cushion base, the plastic container in the pre-screw cap screwed state does not sink under its own weight, but is moved upward by a spring having an elastic force that sinks when the top load of the cap screwing mechanism is applied. When a container whose height from the bottom surface of the flange to the container bottom is higher than the standard value is held by using the one that is biased to, the cushion base sinks and rotates when the top load of the cap screw attachment mechanism is applied. The stopper blade is securely locked to the flange, and the bottom of the container contacts the cushion base to hold the plastic container in a stable manner.When the top load is released after the cap is screwed, the cushion is cushioned. The base returns to its original position due to the elastic force of the spring, and the lock of the rotation stop blade on the bottom surface of the flange is released, and the cap is attached. The removed container moves smoothly to the next process.

[0011]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings. 1 to 3 show an embodiment of a cap mounting device of the present invention, in which reference numeral 1 is a plastic container (hereinafter referred to as a plastic bottle). The plastic bottle 1 is made of a synthetic resin such as biaxially stretched polyethylene terephthalate resin and has a threaded portion 1a formed at its mouth and a flange-shaped flange portion 1b formed at its neck. The body and neck are thicker than the body and have sufficient rigidity.

This plastic bottle 1 is sequentially fed to an intake star of a capping machine by a conveying means such as a screw conveyor (not shown), and a synthetic resin pre-screw cap 4 is attached to the mouth of the plastic bottle 1 and then the intake is taken. It is transferred from each pocket of the star to each pocket 12 of the center star 11. As this press crew cap, a pill fur proof cap made of synthetic resin, which has a function to clearly show the opening when the pill loop proof ring part provided at the bottom of the cap body cylinder part is cut off when the cap is opened, is used. It

The center star 11 includes a rotating column 13, a turntable 14 attached to the column 13, an upper star wheel 15 also fixed above the turntable 14 of the column 13, and a lower star wheel. 16 and 16. The upper star wheel 15 and the lower star wheel 16 are fixed via a support member 18 fixed to the support column 13.

As shown in FIG. 2, three rotation stop blade portions 17 are detachably attached to the pockets 12 of the upper star wheel 15 by using set screws 17c. 3 (a) to 3 (c) show a rotation stopping blade portion 17, which is a disk-shaped main body portion having a central portion projecting upward at a part of the peripheral edge thereof. A blade 17a extending along the radial direction of the portion is formed. Reference numeral 17b is a hole for inserting the set screw 17c. The rotation stopping blade portion 17 is adapted to prevent the rotation of the plastic bottle 1 by locking the blade 17a on the lower surface of the flange portion 1b of the plastic bottle 1 in which each pocket 12 of the upper star wheel 15 is housed. There is. In addition, in the example shown in FIG. 2, three rotation stopper blades 17 are attached to each pocket 12, but the number of rotation stopper blades 17 is not limited to this, and two or Four or more are acceptable. The shape of the rotation stopping blade portion 17 is not limited to those shown in FIGS. 3A to 3C, and may be a polygonal shape such as a quadrangle or a hexagon.

A cushion table 19 is provided at a position where the plastic bottle 1 is installed on the turntable 14, that is, a position directly below each pocket 12 of the upper star wheel 15 and the lower star wheel 16. As shown in FIG. 1, this cushion base 19 is inserted and fixed in a hole having an enlarged upper portion provided in the turntable 14, and is formed into a cylindrical fixing portion 22 having a flange, and inside the fixing portion 22. A sliding portion 21 slidably inserted, a spring 20 interposed between the fixing portion 22 and the sliding portion 21, an installation plate 23 fixed to the upper end of the sliding portion 21, and a fixing portion 22. And a braking nut 24 screwed to the lower portion of the sliding portion 21 protruding from the lower end of the.

The spring 20 of the cushion base 19 does not sink under the self-weight of the plastic bottle 1 in the screwed state of the pre-screw cap 4, that is, the self-weight of the plastic bottle 1 filled with the content liquid, and the top load of the spinning headset 8 It has an elastic force so that it will sink when applied.

The cap mounting device having the above-described structure is provided at a position in contact with the bottom portion 1c of the plastic bottle 1 held in a suspended state in the pocket 12 which is a suspension mechanism provided in the upper star wheel 15 of the center star 11. When the press clean cap 4 attached to the mouth of the plastic bottle 1 is screwed by the spinning headset 8, the cushion base 19 that comes into contact with the bottom 1c of the plastic bottle 1 is provided. The flange portion 1b is supported by the pocket 12 of the upper star wheel 15 serving as a suspension mechanism, and the blade 17a of the rotation stopping blade portion 17 provided on the upper surface side of the peripheral edge of the pocket 12 is locked to the lower surface of the flange portion 1b. While being suspended in this state, the bottom portion 1c is held in contact with the cushion base 17.

As a result, the plastic bottle 1 does not rotate due to the engagement of the blade 17a at the flange portion 1b and the contact of the cushion base 19 with the bottom portion 1c, and further due to the contact with the inner circumference of the pocket of the lower star wheel 16. Also, the cap 1 is screwed in a stable state with the bottom 1c not swinging about the flange 1b as a fulcrum. Further, as the cushion base 19, the plastic bottle 1 in the pre-screw cap screwed state does not sink, but is urged upward by a spring 20 having elastic force that sinks when the top load of the spinning headset 8 is applied. Even if the plastic bottle 1 whose height from the bottom surface of the flange portion 1b to the bottom portion 1c is higher than the standard value is held, the cushion base 19 sinks when the top load of the spinning headset 8 is applied. The rotation stop blade portion 17 is securely engaged with the flange portion 1b, and the bottom portion 1c of the plastic bottle 1 abuts on the cushion base 19, so that the plastic bottle can be stably held, and after the cap screwing is completed, When the load is released, the cushion base 19 is returned to its original position (original height by the elastic force of the spring 20). Return, engagement of the flange portion 1b the lower surface of the rotation stop blade unit 17 is outside is, plastic bottle 1 the cap 4 is mounted to move smoothly to the next step.

[0019]

[Effect of device]

 As described above, in the cap mounting device of the present invention, the pre-screw cap is screwed to the mouth of the plastic container by the cap screwing mechanism at a position in contact with the bottom of the plastic container held by the suspension mechanism. Since a cushion base that comes into contact with the bottom of the plastic container is sometimes provided, the plastic container with the cap screwed on is suspended with the flange supported by the suspension mechanism and the rotation stop blade locked. Since the bottom of the container is held in contact with the cushion base and the rocking of the plastic container can be suppressed, the capping torque is insufficient due to the rocking of the container when the cap is screwed, and the diagonal cover phenomenon occurs. It is possible to prevent such inconveniences, and it is possible to significantly reduce the occurrence of defective cap mounting.

Further, as a cushion base, the plastic container in the pre-screw cap screwed state does not sink under its own weight, and the elastic force causes the spring to sink when the top load of the cap screwing mechanism is applied. When a container whose height from the bottom surface of the flange to the container bottom is higher than the standard value is held by using the one that is biased to, the cushion base sinks and rotates when the top load of the cap screw attachment mechanism is applied. The stopper blade is securely locked to the flange, and the bottom of the container contacts the cushion base to hold the plastic container in a stable manner.When the top load is released after the cap is screwed, the cushion is cushioned. The base returns to its original position due to the elastic force of the spring, and the lock of the rotation stop blade on the bottom surface of the flange is released, and the cap is attached. The removed container moves smoothly to the next process. Therefore, according to the cap mounting device of the present invention, reliable capping can be performed even if there is some variation in the height of the plastic container, and there are problems such as movement trouble of the container and liquid leakage from the container. Can be prevented.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a cap mounting device of the present invention.

FIG. 2 is a plan view of a center star in the apparatus shown in FIG.

3 shows a rotation stop blade portion in the device shown in FIG. 1, (a) is a plan view, (b) is a front view, and (c).
Is a side view.

FIG. 4 is a front view showing a conventional cap mounting device.

[Explanation of symbols]

1 …… Plastic bottle (plastic container), 4 …… Pre-screw cap, 8 …… Spinning headset (cap screwing mechanism), 11 …… Center star, 12 ……
Pocket (suspension mechanism), 13 ... Post, 14 ... Turntable, 15 ... Upper star wheel, 16 ... Lower star wheel, 17 ... Rotation stop blade part, 17a.
Blade, 19 ... Cushion stand, 20 ... Spring.

Claims (2)

[Scope of utility model registration request] 1. A suspension mechanism for holding a plastic container having a screw portion formed at a mouth portion and a flange portion formed at a neck portion in a suspended state by supporting the flange portion, and a suspension mechanism held by the suspension mechanism. A cap screwing mechanism for screwing a pre-screw cap to the mouth of the plastic container, and a suspension mechanism, which is provided on the suspension mechanism, is locked to the lower surface of the flange portion of the plastic container in the cap screwing direction of the plastic container. In a cap mounting device provided with a rotation stop blade portion for preventing rotation, a pre-screw at the mouth of the plastic container by the cap screwing mechanism at a position in contact with the bottom of the plastic container held by the suspension mechanism. A cap mounting device comprising a cushion base that comes into contact with the bottom of the plastic container when the cap is screwed on. 2. The cushion base is not sunk by the weight of the plastic container in the pre-screw cap screwed state, and is urged upward by a spring having an elastic force that sinks when the top load of the cap screwing mechanism is applied. The cap mounting device according to claim 1, wherein the cap mounting device is a cap mounting device.