JPH0633378Y2 - Plastic suction container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a plastic container for containing a developing solution for an electronic copying machine or the like and supplying it as needed, as shown in FIG. The contents are stored in the cylindrical portion 2 of the container body 1 having a bottom through which the piston 3 bottoms out, and the ferromagnetic body 6 made of a ring-shaped iron plate or the like is provided around the suction port 5 at the center of the container top plate 4. A pipe 21 in which the contents are inserted into the suction port 5 via an O-ring or the like so that the ferromagnetic plate is attached to the suction side magnet plate 20 to maintain the airtightness around the suction port 5 Piston 3 on the bottom side of the container
With respect to a transparent plastic suction container in which the contents are taken out while keeping the airtightness while moving the suction port to the suction port side, there is an advantage that the consumption amount can be seen at a glance by the moving amount of the piston.

Conventional Technology and Problems Conventionally, this type of container was a hollow molded product, so that the inner diameters of the container top plate 4 and the container tube portion 2 could not be formed uniformly as shown by reference numeral 4a in FIG. Does not move smoothly in the container cylinder, and there is a problem that the contents of the inner surface of the container cylinder at the piston edge 3a are poorly scraped.
When the movement of the piston 3 is improved, there is a problem that air is sucked through the gap between the piston edge and the inner surface of the container cylinder, and the piston does not move.

Further, in the conventional hollow molded container, the mold is a split mold,
Since a parting surface is created on the outer circumference, as shown in Fig. 5,
Before attaching the iron plate 6 to the container top plate 4 with the iron plate tightening nut 9, the parting surface generated on the contact surface between the O-ring 7 and the container and between the iron plate 6 and the container 8 must be secondarily processed to be flat. There is a problem, and moreover, since the container top plate 4 and the tube portion 2 are not uniform in thickness, the thin cap 4a is conveyed during transportation, for example, as shown in FIG. There is a problem in that the shoulder portion of the container is buckled due to the contact with the container, and the forward movement of the piston is hindered.

In order to solve the problem, therefore, the present invention attaches a ferromagnetic material around the suction port while maintaining airtightness, and causes the ferromagnetic material to be attracted to the magnet plate on the suction side to seal the airtightness around the suction port. In a plastic suction container in which the contents are taken out by sucking the contents from the suction port and moving the piston on the bottom side of the container to the suction port side, the container is provided on the top surface of the container around the suction port. To provide a plastic suction container formed by injection molding with a recessed portion as an injection port, while eliminating the defects of the hollow molding container, provide a contact surface around the suction port, and the back surface of the ferromagnetic material adheres to the contact surface. As described above, there is provided a plastic suction container having a suction port provided with a nut having a skirt-like pressure contact piece on the surface of a ferromagnetic body with elastic deformation, and in the plastic suction container, an inner diameter is provided on the container bottom side. Gradually A suction container made of plastic provided with a trumpet-shaped opening that spreads to the inside, and further, the plastic suction container is provided with a core having an outer peripheral cylindrical shape, an outer mold having an inner peripheral cylindrical shape, and a suction of the container cylindrical portion. An injection molding frame consisting of a shoulder frame that holds the mouth side shoulder part and a holding frame that holds the bottom side outer periphery of the container cylinder part is integrally molded by injection molding.First, the core is pulled out, and the mold is removed. Provided is a plastic suction container obtained by holding a container with a holding frame and pulling it out from an outer mold, and removing the holding frame to obtain a container.

Action In the injection-molded container according to the present invention, the inner diameter is, for example,
Roundness can be obtained within a tolerance of ± 0.1 mm with respect to 80 mm, so the movement of the piston is light, the contact between the piston edge and the cylinder surface of the container is smooth, and the contents may remain on the inner surface of the container. Furthermore, since there is no gap between the inner surface of the container and the piston, there is an effect that air is not sucked in, and a nut with a skirt-like pressure contact piece is provided at the suction port, so that the nut, container and nut can be tightened only by tightening the nut. And the effect of preventing air leakage between the ferromagnetic material and the ferromagnetic material and the container, and because the thickness of the container shoulder can be made thicker, buckling of the container shoulder during transportation is possible. Also, due to the configuration of a trumpet-shaped opening in which the inner diameter gradually expands on the bottom side of the container, when the piston is fitted into the bottom opening, there is an action that does not damage the piston edge,
Furthermore, an outer peripheral cylindrical core, an inner cylindrical outer mold,
A container is integrally molded by injection molding with an injection molding frame composed of a shoulder frame that holds the suction port side shoulder portion of the container tubular portion, and a holding frame that holds the bottom side outer periphery of the container tubular portion. Withdrawing, removing the shoulder frame, holding the container from the outer mold with the holding frame, drawing it out, removing the holding frame and processing to obtain the container, it is relatively easy to mold a container without internal diameter tapers There is an action that can be done.

Embodiments The present invention will be described in detail with reference to the embodiments illustrated below. In FIGS. 1 to 4, 10 is a plastic suction container according to the present invention, which is manufactured by injection molding. The shapes and wall thicknesses of the top plate 4, the suction port 5 and the like are determined and formed by the accuracy of the injection space set between the core and the outer mold. The injection port 11a of the molten plastic at the time of injection molding is, as shown in FIG.
Along the concentric arc of the center of the radial direction of 1, the molten plastic is evenly filled from the top plate 4 into the tube portion 2 at three locations at 120 ° intervals or four locations at 90 ° intervals, and the middle pressure is applied by injection pressure. It is provided at even positions so that the child does not tilt and the thickness does not vary. Shoulder 12 on the suction port 5 side of the container tube 2
Has a thick wall, and a holding groove 13 is formed on the outer periphery of the holding groove, which is supported by a shoulder frame that holds the container tube portion 2 with the shoulder portion 12 when the core is pulled out. Further, the cylinder wall of the cylinder portion 2 has a step portion 14 at a position corresponding to the shoulder portion, and at the position where the top surface of the piston 3 abuts the top plate 4, the piston edge 3a is in close contact with the step portion 14. It is configured to do. The base of the suction port 5 is provided with two steps 5a and 5b in a circular shape between itself and the top plate 4, and a ring-shaped ferromagnetic body 6 made of an iron plate or the like is provided on the step 5a near the top plate 4. It is configured to fit closely. In the case of the present invention, the tightening nut 9 screwed into the screw provided on the outer circumference of the suction port 5 is shown in FIG.
As clearly shown in (b), a skirt-shaped press-contact piece 17 elastically press-contacted to the surface of the ferromagnetic body 6 and a skirt-shaped press-contact piece 18 press-contacted on the inner step portion 5b are provided, and the nut is tightened by tightening. 9 and the container step portion 5b, the nut 9 and the ferromagnetic body 6, and the ferromagnetic body 6 and the container step portion 5a can be prevented from leaking air. Reference numeral 19 is a skirt-shaped contact piece that sets the tightening limit of the nut 9.

22 is a top cap, which has a screw ring 24 and an inner ring 25 that are screwed into the screw of the suction port 5, and in the embodiment,
A contact ring 26, which comes into pressure contact with the top of the suction port 5, is integrally provided, and plays a role of replacing the conventional packing 23. Further, the skirt piece 27 of the top cap 22 is bent outwardly and comes into contact with the container shoulder 12 with a wide contact surface to prevent the container from buckling.

On the other hand, a trumpet-shaped opening 15 whose inner diameter gradually expands is provided at the bottom end of the container tube portion 2. With this configuration,
When the piston 3 is fitted in the bottom opening, the piston edge 3 is smoothly introduced into the cylinder surface of the cylindrical portion by the tapered surface of the opening 15, and the edge 3a is not damaged. 16 is a tail cap fitted to the outer periphery of the trumpet-shaped opening 15.
The piston 3 is prevented from falling off when the contents are filled. Further, the tail cap 16 is provided with an opening 16a at the center so that a finger can be inserted when the container 10 is set on the instrument.

The container of the present invention having the above-described structure is composed of the cylindrical portion 2 and the suction port 5.
A core without a tapping tape other than the outer peripheral cylindrical bottom trumpet-shaped part forming the inner surface of the container, an inner cylindrical cylindrical outer part forming the outer periphery of the container cylindrical part 2, and a suction port of the container cylindrical part 2. Side shoulder
A shoulder frame for forming and holding a holding groove 13 in 12, a screw on the outer periphery of the suction port 5, and a suction port outer die for forming the top plate 4, and a holding frame for holding the outer periphery of the bottom portion of the container tubular portion. Molten plastic is injected from the top plate 4 into the cylindrical portion 2 by injecting molten plastic from the injection ports 11a evenly arranged in the outer die forming the top plate 4 shown in FIG. To prevent the core from inclining due to injection pressure to cause variations in wall thickness, and to integrally mold the container 10 having a uniform wall thickness by injection molding. The suction port 5 and the shoulder portion are formed by the screw and the holding groove 13 of the shoulder frame.
With 12 firmly held, pull out the core without tapping tape, then remove the suction port outer mold by rotating it along the screw and remove the shoulder frame by dividing it and hold the container from the outer mold with the holding frame. Hold and pull out, remove holding frame and process to obtain container. To fill the contents in the container 10, when the piston 3 is introduced into the cylindrical portion 2 through the trumpet-shaped opening 15 at the bottom of the container and suction is performed through the suction port 5, the piston 3 moves to the top as shown in FIG. Move to the position where it sticks to the plate 4, where the opening
When the tail cap 16 is fitted to 15 and the contents are injected from the suction port 5, the contents are filled in the container tube portion 2 in an airtight state while moving the piston 3 toward the bottom, and the piston 3 The filling is completed at the position where it abuts on the tail cap 16. Thus, for example, in the container body 10 containing the developing solution of an electronic copying machine or the like, a ring-shaped iron plate is provided around the suction port 5 at the center of the container top plate 4 by the nut 9 as shown in the first illustration. Attach the ferromagnetic material 6 made of
As shown in FIG. 7, a magnet plate on the attraction side is provided with the ferromagnetic material.
The airtightness around the suction port 5 is maintained by adsorbing to 20 and the content is sucked by the pipe 21 inserted into the suction port 5 through an O-ring or the like to move the piston 3 on the container bottom side to the suction port side. The content can be taken out while maintaining the airtightness while the transparent plastic suction container 10 is consumed at a glance by the moving amount of the piston 3.

Effect And, at this time, in the injection-molded container according to the present invention, the inner diameter dimension, for example, the roundness can be obtained within the tolerance of ± 0.1 mm with respect to 80 mm, the movement of the piston is light, and the piston edge and The problem that the contact with the container cylinder surface is smooth, the contents on the container inner surface are not left, and there is no gap between the container inner surface and the piston, and it is impossible to move due to sucking the outside air With a configuration in which a nut having a skirt-shaped press contact piece is provided at the suction port and a ferromagnetic material is attached, the nut and container, the nut and ferromagnetic material, and the ferromagnetic material and container can be simply tightened. There is an effect that can prevent air leakage between them, and because the thickness of the container shoulder can be molded, buckling of the container shoulder during transportation is eliminated, and the inner diameter on the container bottom side is eliminated. That gradually expands With the configuration of a circular opening, it has the effect of not damaging the piston edge when the piston is fitted into the bottom opening. And a shoulder frame which holds the suction port side shoulder portion of the container tubular portion, and a holding frame which holds the bottom side outer periphery of the container tubular portion, the container is integrally molded by injection molding. Hold it at the suction port and the shoulder to pull out the core without taper, then remove the shoulder frame and hold the container from the outer mold with the holding frame and pull out, remove the holding frame and process to obtain the container. Thus, there is an effect that it is possible to relatively easily form a container having an inner diameter without a taper.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an essential part of one embodiment of the container of the present invention,
FIG. 4 is an explanatory longitudinal cross-sectional view showing an enlarged operation mode of the main part, FIG. 3 is an exploded sectional view showing the entire structure by disassembling, and FIG.
FIG. 5 is a plan view of the top plate of the container, FIG. 5 is a vertical cross-sectional view of a main part of a conventional hollow molded container, and FIG. The figure is a schematic explanatory view for explaining the usage state of the container of the present invention. 1 ... Container body 2 ... Container cylinder 3 ... Piston 4 ... Container top plate 5 ... Suction port 6 ... Ferromagnetic material 7 ... O-ring 8 ... Sealing agent 9 ... Nut 10 ... Container Main body 11 …… Concave part, 11a …… Ejection port 12 …… Shoulder part 13 …… Holding groove 15 …… Opening part 16 …… Tail cap 17,18 …… Skirt-like pressure contact piece 19 …… Abutment piece 20 …… Magnet 21 …… Pipe 22 …… Ceiling cap

Claims (4)

[Scope of utility model registration request] 1. A ferromagnetic material is attached around the suction port while maintaining airtightness, and the ferromagnetic material is attracted to a magnet plate on the suction side to maintain airtightness around the suction port to suck the contents. In a plastic suction container that sucks more and moves the piston on the container bottom side to the suction port side to take out the contents, injection molding is performed by using the recessed part provided on the top surface of the container around the suction port as the injection port. Made of plastic suction container 2. A ferromagnetic material is attached to the periphery of the suction port while maintaining airtightness, and the ferromagnetic material is attracted to a magnet plate on the suction side to maintain airtightness around the suction port to suck the contents. In a plastic suction container in which the piston on the bottom side of the container is moved further to the suction port side to take out the contents, a contact surface is provided around the suction port, and the back surface of the ferromagnetic material is attached to the contact surface. Plastic suction container having a suction port provided with a nut having a skirt-shaped press-contacting piece that presses against the surface of a ferromagnetic material with elastic deformation so that 3. Claims for utility model registration (1) or (2)
Plastic suction container, the plastic suction container having a trumpet-shaped opening on the bottom side of which gradually expands in inner diameter 4. A plastic suction container according to claim 1), (2) or (3), comprising a cylindrical outer core, an outer cylindrical inner mold, and a cylindrical container. An injection molding frame composed of a shoulder frame that holds the suction port side shoulder part and a holding frame that holds the bottom side outer periphery of the container cylinder part is integrally molded by injection molding.First, the core is pulled out and the shoulder frame is removed. Plastic suction container that is processed by holding the container from the outer mold with the holding frame and pulling it out, removing the holding frame and obtaining the container