JPH0619513Y2 - Bottom of container - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a bottom body of a container which is slidably assembled in a cylindrical container body.

[Conventional technology]

Highly viscous creamy contents such as toothpaste are generally stored in tube containers.
The body part is pressed and poured out from the mouth tube.

However, in recent years, a container having such a structure that a kind of pump mechanism is formed in the mouth tube portion and the contents are poured out by pressing the lever has been developed.

Since the inside of this container becomes negative pressure every time the contents are poured out by use, in order to eliminate this negative pressure, the bottom wall of the container gradually advances in the container main body after each use. Has become.

FIG. 4 shows a typical structure of a bottom body forming the bottom wall of a conventional container of this type. The bottom body 3 is provided with a spout in the cylindrical main body 2 of the container 1. A piston 4 that slides toward one end and slides with its peripheral end edge in close contact with the inner peripheral surface of the main body 2, and is mounted on the rear side of this piston 4 and radially in a diagonally rearward direction. A stopper 10 made of a hard elastic material, which serves as a locking piece 13 for locking the extended ends of a large number of leg pieces 12 on the inner peripheral surface of the main body 2 in the backward direction, and a rear portion of the piston 4 from the rear side. The stopper 10 for the piston 4 by being fitted and fixed
The assembly of the piston 4 and the stopper 1
And a support body 14 that covers the rear side surface of the combination with 0.

The piston 4 stores the contents in the main body 2 without leaking the contents by leaking the peripheral edge closely to the inner peripheral surface of the main body 2,
It gradually advances in the main body 2 as the contents are poured out.

The stopper 10 is provided to prevent the forward piston 4 from moving backward in the backward direction.
By locking the locking piece 13 at the tip of 2 onto the inner peripheral surface of the main body 2 in the backward direction and locking the same, the illegal backward movement of the piston 4 due to an impact or the like is reliably prevented.

[Problems to be solved by the invention]

In the above-described conventional configuration, the locking piece 13 of the leg piece 12
Has to be hooked and locked on the inner peripheral surface of the main body 2, the diameter of a virtual circle connecting the locking pieces 13 needs to be slightly larger than the inner diameter of the main body 2. When assembled to the piston 4, the respective locking pieces 13 of the stopper 10 project outward from the outer peripheral surface of the piston 4.

Therefore, when the bottom body 3 is conveyed as a member or is handled in the aligning machine, the protruding locking piece 13 may damage the piston 4 of another bottom body 3, or the bottom body 3 may be damaged.
When inserting and assembling the inside of the main body 2, the protruding locking piece 13
Sometimes damages the inner peripheral surface of the main body 2, which causes a problem that the sealability of the piston 4 deteriorates and causes a malfunction.

In addition, when handling in the aligning machine, the protruding locking piece 13
However, there is a problem in that they are caught on another bottom body 3 and cannot be properly aligned, resulting in malfunction of the aligning machine.

Therefore, the present invention was devised to solve the above-mentioned problems in the prior art, and in the state before being assembled in the container body and functioning as a bottom body, the stopper which is the tip of the leg piece of the stopper. It is a technical problem to prevent the piece from protruding outward from the outer circumferential circle of the piston, thereby preventing the bottom piece and the main body from being damaged by the locking piece, and the locking piece for other articles. The purpose is to eliminate the possibility of being caught.

[Means for Solving the Problems]

Means of the present invention for solving the above technical problem is to provide a bottom body of a container which slidably moves toward a side end provided with a spout of the main body in a cylindrical container main body. Having a piston slidably in contact with the inner peripheral surface of the container body, the tip of a large number of leg pieces that are assembled on the rear side of this piston and extend diagonally rearward on the inner peripheral surface of the container main body. Having a stopper made of a hard elastic material as a locking piece that is caught and locked in the backward direction, has a disc-shaped bottom plate having an outer diameter smaller than the inner diameter of the container body,
It has a support that pushes and spreads a large number of leg pieces of the stopper by being attached to the rear part of the pisson to elastically contact the stopper locking piece with the inner peripheral surface of the container body. The inclination posture of each leg of the stopper is set so that the diameter of an imaginary circle connecting the locking pieces at the tip of each leg is substantially equal to the diameter of the bottom plate of the support.

[Action]

The bottom body is assembled by assembling the support body on the rear side of the piston, which has the stopper fixedly attached to the rear side, in a temporarily fixed state in which the legs of the stopper are not expanded.

In this temporarily fixed state, the diameter of an imaginary circle that connects the locking pieces that are the tips of the leg pieces is approximately equal to the diameter of the bottom plate of the support body that is smaller than the outer diameter of the piston, so the entire stopper is The respective locking pieces are located between the piston and the support without protruding from the extension range of the outer peripheral surface of the piston.

Therefore, when a large number of temporarily fixed bottom bodies are collectively conveyed, the stopper pieces of the stopper do not press against the pistons of the other adjacent bottom bodies. It is possible to prevent the piston from being scratched, and when handling a large number of temporarily fixed bottom bodies by the aligning machine of the automatic assembly device, the stopper pieces of the stopper are caught on the other bottom bodies. Since the bottom body is not misaligned, the aligning machine operates stably.

To assemble the bottom body to the container body, insert the bottom body to the fixed position inside the container body with the temporary fixing state, and at this fixed position inside the container body, place the temporarily fixed support body against the piston. In this state, the bottom plate of the support body pushes and spreads each leg piece of the stopper, and the locking piece is pressed against the inner peripheral surface of the container body so as to be locked in the backward direction.

In this way, the bottom body is inserted and assembled in the container body because the stopper locking piece does not project outward from the piston, so that the bottom body is inserted and assembled in the container body. At the time of attachment, the stopper engagement piece does not come into contact with the inner peripheral surface of the container body, so that the opening edge portion of the container body and the inner peripheral surface are not scratched by the galling of the stopper engagement piece.

Since the stopper locking pieces are pressed against the inner peripheral surface of the container body by pressing and spreading the stopper leg pieces by the bottom plate of the support, the pressure contact between the stopper locking pieces against the inner peripheral surface of the container body is performed. The degree is set according to the elasticity of each leg piece itself and the extent to which each leg piece is spread by the support.

Therefore, regardless of the level of elasticity of the stopper molding material, it is possible to optimally adjust and set the degree of pressure contact of the locking piece with the inner peripheral surface of the container body by adjusting the extent to which each leg is pushed and expanded by the support. It will be possible.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The container 1 is configured such that a head part having a spout and having a pump mechanism for pouring out contents by lever operation is provided at one end of a main body 2 made of a synthetic resin having a cylindrical shape. The other end is an opening whose diameter is slightly increased toward the opening end.

The piston 4 of the bottom body 3 is an integrally molded product made of a soft synthetic resin, and is formed on the lower end of the outer peripheral surface of a short cylindrical piece suspended from the peripheral edge of the spherical arc-shaped top wall 5 having a diameter smaller than the inner diameter of the main body 2. A ring-shaped seal wall 6 having sealing tongues that tightly elastically contact the inner peripheral surface of the main body 2 is provided around the upper and lower sides, and a rear end portion of a cylindrical tubular portion 7 hung down at the center of the rear surface of the top wall 5 is provided. A plurality of vertical rib-shaped rib strips 8 are provided on the outer peripheral surface over the remaining substantially entire length.
A peripheral strip 9 is provided around the rear end of the outer peripheral surface of the tubular part 7 at a slight distance from the rear end edge of the tubular part 7. The reference numeral 9 forms an assembly portion of the stopper 10 and the support body 14.

The stopper 10 made of a thin steel plate is engaged with the tip from the ring portion 11 which is fitted over the rear end portion of the cylindrical portion 7 of the piston 4 in a state of overcoming the peripheral rib 9 and being in contact with the rear end edge of the rib rib 8. Stop piece 13
A plurality of leg pieces 12 formed by bending are integrally formed in a radial shape, and each leg piece 12 has a length larger than the distance to the inner peripheral surface of the main body 2, Therefore, the diameter of the imaginary circle connecting the locking pieces 13, which are the tips of the leg pieces 12, is smaller than the inner diameter of the main body 2.

The support body 14 has a fitting cylinder 16 which is fitted tightly into the cylinder portion 7 of the piston 4 in the center of the front surface of a flat disk-shaped bottom plate 15 having a diameter smaller than the inner diameter of the main body 2, and a front peripheral edge of the bottom plate 15. In the part, a short cylinder 17 having a low height is erected,
Depending on the degree of fitting of the fitting cylinder 16 into the cylinder portion 7, the support 1
Adjust the degree of assembly of the piston No. 4 to the piston 4.

In addition, the short cylinder 17 is a portion that pushes and spreads the leg pieces 12 from the support body 14, and the leg pieces 12 are formed at the peripheral end circle of the bottom plate 15.
As compared with the case where the leg pieces 12 are pushed apart, the force point to the leg pieces 12, that is, the fulcrum for elastically deforming the leg pieces 12 can be located closer to the center side, which makes the elastic deformation form of the leg pieces 12 smoother and the main body 2 It is possible to obtain a smooth forward movement of the bottom body 3 in the inside and a comfortable locking operation.

[Effect of device]

Since the present invention has the above-mentioned configuration, it has the following effects.

In the temporarily assembled state of the bottom body, the entire stopper is located between the piston and the support body while being covered by the bottom plate of the support body on the rear side of the piston. The locking piece, which is the tip of the, does not get caught on the other bottom body, so that the other bottom body is not damaged and a smooth and favorable handling form can be obtained.

The locking force of the stopper with respect to the main body can be adjusted and set not only by the elastic force of the stopper but also by the mounting degree of the support body with respect to the piston, so that the locking force of the stopper with respect to the main body can be freely adjusted and set, Therefore, the bottom body can be assembled in the main body in a state where the bottom body can be smoothly moved forward while exerting a reliable locking force.

Since the stopper is locked to the main body after the bottom body is inserted and assembled in the main body, it is possible to scratch the opening edge and the inner peripheral surface of the main body when the bottom body is assembled to the main body. Without, it is possible to obtain a stepwise assembling operation for the main body of the bottom body.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing an embodiment of the present invention in which a bottom body in a temporarily assembled state is inserted and assembled in a main body of a container. FIG. 2 is a vertical sectional side view of the embodiment shown in FIG. 1 in which the bottom body is fully assembled and assembled to the main body. FIG. 3 is an overall exploded perspective view of the bottom body of the embodiment shown in FIG. FIG. 4 is a vertical sectional side view showing a conventional example. DESCRIPTION OF SYMBOLS 1; Container, 2; Main body 3; Bottom body, 4; Piston 5; Top wall, 6; Seal wall 7; Cylindrical part, 8; Rib line 9; Perimeter line, 10; Stopper 11; Ring part, 12 Leg pieces 13; locking pieces, 14; support body 15; bottom plate, 16; fitting tube 17; short tube

Claims (1)

[Scope of utility model registration request] 1. A bottom body of a container which slidably moves toward a side end provided with a spout of the body (2) in a cylindrical container body (2), the peripheral end of which is the body. (2) Piston (4) slidably intimately contacted with the inner peripheral surface, and the tips of a large number of leg pieces (12) assembled on the rear side of the piston (4) and extending diagonally rearward Is a stopper (10) made of a hard elastic material, which is a locking piece (13) that hooks and locks on the inner peripheral surface of the main body (2) in the backward direction.
And a disc-shaped bottom plate having an outer diameter smaller than the inner diameter of the main body (2)
(15), which is mounted on the rear side portion of the piston (4), pushes and spreads the large number of leg pieces (12) to move the locking pieces (13) to the inner circumference of the main body (2). Support to be elastically contacted with the surface (1
4) and the tilted posture of each leg piece (12) of the stopper (10) before being pushed and spread by the support body (14), and the locking piece at the tip of each leg piece (12) ( A bottom body of a container which is set so that the diameter of a virtual circle connecting 13) is set to be substantially equal to the diameter of the bottom plate (15) of the support (14).