JPS6020585Y2 - Container cap parts - Google Patents

Description

[Detailed description of the invention] This invention relates to a cap member of a container, and in particular, to a cap member of a container equipped with a nut for attaching a crown, a hollow cylindrical body with a threaded portion on the inner circumferential surface. A thin-walled part with a knurled part formed on the outer peripheral surface is interposed between the head formed at one end in the axial direction of the body, and a mouthpiece body connected in the axial direction is used. By crimping the cap body mounting plate with the part and simultaneously engaging the knurled part,
It is possible to increase the fixing strength and the dimensional accuracy between the nuts, and to manufacture a lightweight and inexpensive base member.

Generally, the cap part of a container made of a flexible material or a metal material, such as an aircraft fuel tank, is attached to the cap body inside a flange 1 that joins the container (not shown), as shown in FIG. A plate 2 is provided to form a sealing part, and a plurality of cap bodies 4 having screws 3 carved on the inner circumference are fixed at a constant pitch in the circumferential direction of the cap body mounting plate 2. .

Conventionally, as a means of fixing the cap body provided with this screw to the cap body mounting plate, the cap body is pressure-fitted to the cap body mounting plate, or by welding to the cap body mounting plate or by attaching the cap body to the cap body mounting plate. For example, as the former means, an annular groove is interposed between a head protruding in the outer circumferential direction at the end of the mouthpiece body, and the outer diameter is larger than that of the head. A flange having a shape is formed, a protrusion is provided around the outer circumferential surface of the flange, and the outer circumferential surface of the head is brought into close contact with the insertion hole by press-fitting the cap body from the lower surface of the insertion hole of the cap body mounting plate. At the same time, the lower edge of the insertion hole is deformed to bulge into the annular groove between the head and the flange,
Furthermore, there is one in which the upper edge of the protrusion of the flange is attached to the lower end of the mounting plate of the cap body, and a protrusion is provided around the outer peripheral surface of one end of the cap body, and the flange is attached to the lower side of this outer peripheral surface. By forming the insertion hole of the cap body mounting plate to a diameter slightly smaller than the outer diameter of the part where the protrusion is provided, and press-fitting the cap body, the cap body mounting plate is compressed and deformed to form the insertion hole. There is one in which the inner surface of the blade is attached to a protrusion.

However, with this type of press-fitting, there is a certain limit to the adhesion strength, and not only can the cap body loosen or fall off, but also the cap member can curve or recur as the cap body mounting plate deforms. , the sealing function is hindered, and there are also disadvantages such as the pitch between the threaded portions being different.

As the latter method, there is a method in which a flange is provided on the cap body, the flange is inserted into the insertion hole of the cap body mounting plate, and then the peripheral edge of the flange is welded to the cap body mounting plate. There is one in which a protrusion is provided and placed in a mold or mold, and the material of the base body mounting plate is melted and injected, and then hardened.

All of these methods have the advantage of obtaining higher fixing strength than the former, but welded ones have the same disadvantages as above because they cannot avoid curving due to deformation of the base mounting plate.
Although fusion bonding can avoid the drawbacks caused by deformation of the base mounting plate, it not only increases the weight of the entire base member compared to other methods, making it inconvenient to handle, but also requires manufacturing jigs,
This method has disadvantages such as complicated equipment, requiring many steps, and being expensive.

This invention was made in order to eliminate the drawbacks of the above-mentioned conventional container cap members.

Therefore, the purpose of this invention is to provide a cap member for a container that increases the adhesion strength between the cap body provided with a threaded portion and the cap body mounting plate; Another purpose of this invention is to provide a lightweight and inexpensive cap member, which is suitable for a cap member in a liquid storage container. A further object of the present invention is to provide a cap member for a container that allows the cap body to be fixed to the cap body mounting plate with a simple operation.

That is, as shown in the embodiments described later, this invention provides a cap member in which a cap body with a screw provided on the inner circumferential surface is fixed to a cap body mounting plate of a container.
, an annular head 5 formed at one end in the axial direction, a hollow cylindrical thin-walled part 6 having a knurled part 8 formed on the outer peripheral surface and connected to the head with an outer diameter smaller than the head, and an inner part. There is a threaded part 9 on the circumference.

The cap body 4 is made up of a hollow cylindrical body 7 having an outer diameter approximately the same as the thin wall portion and connected to the thin wall portion. The thin wall portion 6 is inserted into the insertion hole 10 in this state and is bent and deformed outward in the radial direction by an external force applied in the axial direction through the bolt screwed into the threaded portion 9 of the body portion 7, and then the cap body is attached. It is characterized in that it is press-fitted to the lower surface of the plate 2, and the peripheral edge of the insertion hole 10 is engaged by the knurled part 8 of the thin-walled part 6.

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

FIG. 2 shows an embodiment of the cap body 4 according to this invention, which basically includes a head 5, a thin wall portion 6, and a body portion 7.
Usually made of general steel or corrosion-resistant steel.

The head 5 is an annular body formed on the outer peripheral edge of one end in the axial direction and having an appropriate inner diameter, outer diameter, and length in the axial direction.

In the illustrated cross-section, it is formed in a countersunk shape, but it can also be formed in a flat-head shape or any other arbitrary cross-sectional shape.

The outer diameters of the thin portion 6 and the body portion 7 are approximately the same, but both are formed smaller than the outer diameter of the head portion 5.

The thin part 6 has an inner diameter equal to the inner diameter of the head 5, and is a hollow cylindrical body having an appropriate wall thickness and length in the axial direction.

Further, a knurled portion 8 is formed on the outer peripheral surface of the thin portion 6.

This knurled portion 8 is preferably provided close to the connecting portion with the head 5, and in the illustrated embodiment, it is formed adjacent to the lower end of the head 5 over the entire circumferential direction.

Knurling can be carried out using a known tool as appropriate, and the illustrated form has lines parallel to the axial direction, but other forms such as slanted or mesh may be selected as appropriate. can.

The body portion 7 is a hollow cylindrical body that has an inner diameter smaller than that of the thin wall portion 6, has a wall thickness larger than the thin wall portion 6, and has a required length in the axial direction.

A threaded portion 9 having a required pitch and number of threads is carved on the inner circumferential surface of this body portion 7.

The mouthpiece main body 4 is constructed by connecting the head 5, the thin wall portion 6, and the body 7 having the above configuration in the same axial direction and molding them integrally.

The cap body mounting plate to which the cap body 4 is fixed must be manufactured by selecting the most appropriate material depending on the type and shape of each container, the size of the cap, and the purpose of use.

In general, the cap member is manufactured using light aluminum alloy to make it lightweight, but if necessary, other materials such as general steel, corrosion-resistant steel, aluminum alloy, or reinforced plastic may also be used.

FIG. 3 is a partially longitudinal front view showing a state in which the base body 4 is fixed to the base body mounting plate 2.

The insertion hole 10 formed in the base body mounting plate 2 has an upper part with a truncated conical cross section similar to the head part 5 of the base body 4, and a lower part thereof which is slightly larger than the outer diameter of the thin wall part 6 of the base body 4. formed to have a diameter.

Insert the body 7 of the cap body 4 into this insertion hole 10 and insert the head 5
is locked in the upper part of the insertion hole 10, and the head 5 is pressed by an appropriate means to restrain the axial and circumferential movements of the cap body 4, and then a bolt (not shown) is inserted into the threaded portion of the body 7. 9 and rotate it in a certain direction, the threaded part 9 will be attached to the body part 7.
Since an external force in the axial direction is applied through the insertion hole 10, the head 5 fixed to the upper part of the insertion hole 10 is displaced in the axial direction, and the thin part 6, which has low strength, is finally bent and deformed diametrically outward. It protrudes and comes into pressure contact with the lower part of the insertion hole 10 and the lower surface of the base body mounting plate 2.

When the bolt is further rotated to increase the external force in the axial direction applied to the body 7, the knurled part 8 formed on the outer circumferential surface of the thin wall part 6 connects with the lower part of the insertion hole 10 and the base body mounting plate 2.
It is caught between the bottom surface of the

In this way, the cap body 4 is crimped to the upper and lower parts of the insertion hole 10 and the lower surface of the cap body mounting plate 2, respectively, with great adhesion strength by the head 5 and the knurled portion 8 of the thin wall portion 6.

In addition, since the thin wall portion 6 of the cap body 4 is fixed by deformation, the cap body mounting plate 2 itself is not deformed.

Since a plurality of the cap bodies 4 are attached to a cap body mounting plate to constitute a cap member, if the cap of the container has a large diameter, the weight of the cap member will inevitably be large.

Therefore, it is preferable to use light aluminum alloy rather than steel to reduce the weight of such a cap body, similarly to the cap body mounting plate.

In this case, as shown in FIG. 4, a cylindrical coil 11 made of corrosion-resistant steel is attached to the threaded portion 9 to protect the threaded portion.

Next, an embodiment will be described in which the cap member of this invention is applied to a cap of a liquid storage container to form a seal portion on the cap member.

FIG. 5 shows an embodiment in which the cap member of this invention is applied to the cap of a container made of a flexible material. The part 5 is covered with an elastic body 13 having an opening 12 having the same diameter and provided in the same axial direction as the head 5, the upper surface 13a of the elastic body 13 is used as a sealing part, and the flange 1 of the elastic body 13 is used as a container. 15.

By applying a cap (not shown) to the cap and screwing a bolt (not shown) to the threaded portion 9 of the cap body 4, a tight seal is created between the cap and the cap, and furthermore, the cap and the cap are attached. Leakage from the gap between the plate and the plate is prevented.

FIG. 6 shows another embodiment in which the cap member of this invention is applied to the cap of a container made of a flexible material.

In this embodiment, the cap member is constituted by a cap body 4 having a head 5 shaped like a flat head.

A rigid body 16 having an opening 12 having the same diameter as the head 5 of the base 4 in the same axial direction as the head 5 is brought into close contact with the end surface of the head 5 of the base 4, and the rigid body 16 and the base An elastic body 13 is attached between the mounting plate 2 and the flange 1 of the elastic body 13 to be joined to the container 15.

In this embodiment, the rigid body 16 is made of the same material as the base body mounting plate 2, and the upper surface 16a of the rigid body 16 serves as a sealing portion.

When a cap is attached to the cap and a bolt is screwed into the threaded portion 9 of the cap main body 4, the rigid body 16 prevents the elastic body 13 from being bent due to deformation. The sealing function is not impaired.

By inserting a sealing material (not shown) such as a sealant into the gap between the cap body 4 and the cap body mounting plate 2, the leakage prevention effect can be enhanced.

FIG. 7 shows an embodiment in which the cap member of this invention is applied to the cap of a metal container.

The flange 1 of the cap body mounting plate 2 to which the cap body 4 is fixed is adhered to the container 15, and the upper surface 2a of the cap body mounting plate 2, which is a rigid body, is used as a sealing portion.

In the gap between the cap body 4 and the platinum body mounting plate 2, a sixth
Similarly to the illustrated embodiment, by inserting a sealing material (not shown) such as a sealant, the leakage prevention effect can be enhanced.

As mentioned above, this idea is such that the head of the cap body and the thin wall part press the top and bottom surfaces of the cap body mounting plate, and at the same time, the knurled part of the thin wall part engages the periphery of the insertion hole of the cap body mounting plate. The structure is as follows.

Therefore, the fixing strength of the base body is extremely high, and no matter how much external force is applied to the base body from any direction, it will not loosen or fall off.

Moreover, since it is fixed to the base body mounting plate by deformation of the thin wall part of the base body and bite by the knurled part, there is no deformation of the base body mounting plate unlike with conventional press-fitting, and the dimension between the threaded parts is fixed. Not only can the accuracy be improved, but also the sealing function required as a cap member of a liquid storage container can be maintained at a high level.

In addition, since the base body is easily fixed by simply rotating the bolt, it can be manufactured at low cost without requiring special equipment unlike conventional welding or fusion.

Furthermore, the weight of the cap member can be reduced by appropriately selecting the material of the cap body and the cap body mounting plate from steel or light alloy depending on the diameter of the cap.

Therefore, according to this invention, it is possible to economically meet a wide range of demands as a cap member for a container that requires a cap fitted with a nut, regardless of the material of the container and its intended use.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the cap member of the container, Fig. 2 is a semi-vertical front view showing an embodiment of the cap body of this invention, and Fig. 3 is a semi-sectional view showing how the cap body and the cap body mounting plate are fixed. 4 is a semi-vertical front view showing a fixed state of the cap body according to another embodiment, and FIGS. 5 to 7 are sectional views showing the cap portion of a container using the cap member of this invention, respectively. It is. In the figure, 2 is the base body mounting plate, 4 is the base body, 5 is the head,
Reference numeral 6 is a thin wall portion, 7 is a body portion, 8 is a knurled portion, 9 is a threaded portion, and 10 is an insertion hole.

Claims (1)

[Scope of utility model registration request] In a cap member formed by fixing a cap body having a screw on the inner circumferential surface to a cap body mounting plate of a container, the cap body includes:
An annular head shaped at one end in the axial direction, a hollow cylindrical thin-walled part with a knurled part formed on the outer peripheral surface and connected to the head with an outer diameter smaller than the head, and a hollow cylindrical thin-walled part formed on the inner peripheral surface. The cap body consists of a hollow cylindrical body with a threaded part carved therein and connected to the thin wall part with an outer diameter that is approximately the same as that of the thin wall part, and the head of the cap body is latched to the top surface of the cap body mounting plate. The thin part is inserted into the insertion hole in a state where it is bent and deformed radially outward due to an external force applied in the axial direction via a bolt screwed into the threaded part of the body, and then it is crimped to the bottom surface of the base mounting plate. It is characterized in that the peripheral edge of the insertion hole is engaged by a knurled part of the thin wall part.