JPH0711556U - Closed container - Google Patents

Abstract

(57) [Summary] [Purpose] The sealed structure of the container body and lid has a strong screw structure that prevents the lid from coming off and liquid leakage due to drop impact,
Reusable as a closed container by facilitating lid installation and removal. A container in which an outer peripheral edge portion of a lid can be screwed onto an upper edge portion of an opening of a bottomed container body, and the lid can be attached to either one of the upper edge portion of the opening or the outer peripheral edge portion. A male thread portion of a screw thread consisting of a pair of protrusions was formed, and a female thread portion of a thread groove consisting of a pair of groove grooves that fit the pair of protrusions of the male screw portion was formed on the other side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a closed container useful for enclosing a liquid, such as a pail can enclosing a lubricating oil.

[0002]

[Prior art]

 For example, pail cans are required to have a strong sealed structure that can withstand accidents during transportation. Specifically, the drop test shall not cause the lid to come off or the liquid to leak.

In this respect, in the case of the conventional high-density polyethylene pail can (see FIG. 6), the downward hook-shaped locked portion 52 is formed on the opening upper edge portion 51 of the container body 50, and the outside of the lid 53 is formed. The peripheral portion 54 is provided with an abutting portion 55 which is in pressure contact with the inner surface of the opening upper edge portion 51, and an upward hook-shaped locking portion 56 is vertically provided outside the abutting portion 55. The outer peripheral edge portion 54 of the lid 53 is fitted to the upper edge portion 51 of the opening with the packing 57 interposed therebetween, and the sealing state by the packing 57 is determined by the locking relationship between the locked portion 52 and the locking portion 56. This locking relationship is maintained by the pressure contact relationship between the inner surface of the opening upper edge portion 51 and the contact portion 55.

However, since a pressure of about several hundred kg is required to fit the lid, a press device is required as a facility for this fitting work, and the fitting work is troublesome and troublesome. there were. Furthermore, when removing the lid, a part of the lid is destroyed with a special tool, and as a result, there is the inconvenience that it cannot be reused as a closed container, which is a problem from the viewpoint of resources and environment. Also, since the metal suspension ring 58 is attached separately, it takes time and effort to manufacture and attach it, and to sort it when recycling it by using different materials. Since the sealed state depends exclusively on the packing, and the packing is configured to be crushed by the above-mentioned strong fitting pressure, the degree of deterioration is fast and it cannot be reused.

[0005]

[Problems to be solved by the device]

 Since the problem to be solved is a closed structure that relies on packing, there is no detachment of the lid or liquid leakage due to a drop impact, but on the other hand, when removing the lid, it cannot be removed unless a part of the lid is destroyed, and a closed container. That is, it cannot be reused.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a container in which an outer peripheral edge portion of a lid can be screwed and attached to an upper edge portion of an opening of a bottomed container main body, wherein either the upper edge portion or the outer peripheral edge portion of the opening is attached. On one side, form the male thread part of the screw thread consisting of a pair of ridges on both the inner and outer surfaces, and on the other side form the female thread part of the thread groove consisting of a pair of ridge grooves that fit the pair of ridges of this male thread part. It is characterized in that it is configured to be formed.

Further, the present invention has a substantially trapezoidal cross section in a direction in which a screw thread in a male screw portion is screwed in, and a substantially inverted trapezoidal cross section in a direction in which a screw groove in a female screw portion is screwed in. It is characterized by having a certain configuration.

The material of the container body and the lid in the present invention is resin such as high-density polyethylene or metal.

[0009]

[Action]

 A male thread part of a thread consisting of a pair of inner and outer ridges is formed on either the upper edge of the opening of the bottomed container body or the outer peripheral edge of the lid, and the pair of ridges of this male thread is formed. Since the female thread part of the thread groove consisting of a pair of thread grooves is formed on the other side, the screw thread consisting of a pair of protrusions on both the inner and outer surfaces must be screwed into the thread groove consisting of a pair of thread grooves. It is possible to obtain a strong screwing strength inside and outside of this screwing axis, and it is suitable for enclosing liquid without causing the lid to come off and liquid leakage without enduring the impact when dropped.

The lid can be securely removed without damaging both male and female screw parts by releasing the screwing relationship with the container body, so it can be reused as a closed container and contributes to resources and environment. it can.

Since the lid is screwed onto the container body so as to be hermetically closed, the lid work can be performed easily, saves labor, and requires no press equipment, which is economically advantageous.

The male screw portion is formed to have a substantially trapezoidal cross section in the direction of screwing the thread, and the female screw portion is formed to have a substantially inverted trapezoidal cross section in the direction of screwing. Therefore, the screwing relationship between the male and female screw portions works by strengthening the mutual tightening and making it difficult to loosen, so that particularly strong screwing strength can be obtained.

[0013]

【Example】

 1 to 4 exemplify a mode in which the closed container of the present invention is a pail can. The bottomed container body 2 and the lid 9 of the pail can 1 are made of high-density polyethylene, and are integrated together. It is molded.

The container main body 2 has a male part 4 of a screw thread 5 consisting of a pair of protrusions 5a on both inner and outer surfaces at the upper edge 3 of the opening. The screw thread 5 has a symmetrical shape and is screwed. It is formed in a trapezoidal cross section in the inserting direction, that is, toward the upper end of the opening upper edge portion 3.

Further, the container body 2 is formed to have a gradually smaller diameter from the side surface portion 6 to the bottom portion 7, and a reinforcing rib 8 is provided on the outer periphery in the middle of the side surface portion 6 so as to project. The form of the side surface portion 6 is strengthened so that the container body 2 (mainly the side surface portion 6) is not deformed when the contents are enclosed. Further, by fitting the upper ribs 3 of the opening of the other container main body 2 to the reinforcing ribs 8, the single container main body 2 can be stacked vertically without being bulky. Further, by forming the outer diameter of the bottom portion 7 to be smaller than the inner diameter of the outer peripheral edge portion 10 of the lid 9, and placing the bottom portion 7 on the upper surface portion 13 of the lid 9, the can 1 sealed with the lid 9 is moved up and down. It is stackable.

The lid 9 has an outer peripheral edge portion 10 formed in a substantially inverted U-shaped cross section, and has a pair of groove grooves 12a on both inner and outer surfaces inside the groove, which are fitted to the pair of protrusions 5a of the male screw portion 4. The female screw portion 11 of the screw groove 12 is formed. The screw groove 12 has a bilaterally symmetrical shape, and is formed in a substantially inverted trapezoidal cross section toward the screwing direction, that is, toward the lower end of the outer peripheral edge portion 10. The female screw portion 11 of the lid 9 is screwed into the male screw portion 4 to seal the inside of the container body 2.

The lid 9 has a recess 14 formed in the center of the upper surface 13 and a handle 15 extending over the recess 14, and a plug 16 is provided near the side of the upper surface 13. is doing.

This makes it possible to obtain a strong sealed structure with the male screw portion 4 and the female screw portion 11. Further, all the constituent members are made of the same material, and the handle 15 is formed on the lid 9 in the same body. Therefore, in addition to eliminating the sorting work at the time of recycling, it is economical in terms of production and can contribute to resources and the environment.

FIG. 5 illustrates another embodiment of the screwing relationship between the container body 2 and the lid 9. The female screw portion 11 is provided on the upper edge 3 of the opening of the container body 2, and the outer peripheral edge of the lid 9 is shown. A male screw portion 4 is formed on each of the portions 10 and is firmly screwed together. A cover 17 is provided on the outside of the outer peripheral edge portion 10 of the lid 9 so as to prevent foreign matter from entering the screwed portion from the outside.

[0020]

[Effect of device]

 A. According to claim 1, a male thread portion of a screw thread consisting of a pair of inner and outer ridges is formed on either one of the upper edge portion of the opening of the bottomed container body or the outer peripheral edge portion of the lid. Since the female thread part of the thread groove consisting of a pair of thread grooves that matches the pair of thread projections of the screw part is formed on the other side, the screw thread consisting of a pair of thread projections on both the inner and outer surfaces consists of a pair of thread grooves. In the state of being screwed into the thread groove, a strong screwing strength inside and outside of this screwing axis can be obtained, and the lid does not come off to withstand the impact when dropped and the liquid does not leak and the liquid is sealed. Suitable to do.

B. According to the above paragraph, the lid can be securely removed without damaging both male and female screw parts by releasing the screwing relationship with the container body, so it can be reused as a closed container and contributes to resources and environment. .

C. According to the above paragraph, since the lid is screwed onto the container body so as to be hermetically closed, the lid work can be performed easily, saves labor, and requires no press equipment, which is economically advantageous.

D. According to claim 2, the male screw portion has a substantially trapezoidal cross section in the direction of screwing in, and the female screw portion has a generally inverted trapezoidal cross section in the direction of screwing. Since this is formed, the screwing relationship between the male and female screw portions works by strengthening the mutual tightening and making it difficult to loosen, and particularly strong screwing strength can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view illustrating a pail can as an airtight container of the present invention.

FIG. 2 is a vertical sectional view taken along the line AA of FIG.

FIG. 3 is a partial front view showing an upper edge portion of an opening of a container body, in which a part is cut away.

FIG. 4 is a vertical cross-sectional view showing a state in which container bodies are stacked on each other.

FIG. 5 is a partially enlarged vertical cross-sectional view showing another aspect of the screwing relationship between the container body and the lid.

FIG. 6 is a partial vertical sectional view showing a conventional pail can.

[Explanation of symbols]

 1 Pail can 2 Container body 3 Upper edge of container body opening 4 Male screw part 5 Male screw thread 5a Thread ridge 6 Side of container body 7 Bottom of container body 8 Reinforcing rib 9 Lid 10 Lid Outer peripheral edge part 11 Female screw part 12 Female screw part screw groove 12a Screw groove groove 13 Top surface part of lid 14 Recessed part 15 Handle 16 Plug 17 Cover part

Claims (2)

[Scope of utility model registration request] 1. A container in which an outer peripheral edge portion of a lid is screwed onto an upper edge portion of an opening of a bottomed container main body so that the lid can be attached to either the upper edge portion of the opening or the outer peripheral edge portion. While forming the male screw part of the screw thread consisting of a pair of ridges on both sides,
A hermetic container in which a female thread portion of a thread groove formed of a pair of thread grooves that fits a pair of protrusions of the male thread portion is formed on the other. 2. The cross-section of the male screw part has a substantially trapezoidal shape in the direction of screwing in, and the screw thread of the female screw part has a substantially inverted trapezoidal cross-section in the direction of screwing. The closed container according to claim 1, which is characterized in that.