Pump and method for manufacturing the same

Abstract

To provide a pump which can suppress sticking of a screwing part for storage caused by vapor deposition treatment, and occurrence of vapor deposition peeling by screwing friction, and a method for manufacturing the same.SOLUTION: A pump device includes: a pump 1 having a container side member 1a mounted on a container and a head side member 1b that has a discharge head 2 and is reciprocative with respect to the container side member 1a, in which the pump 1 is expanded / contracted in a cylinder shaft direction between an expanded state and a contraction state by pressing operation to the discharge head 2 to reciprocate a piston 4 with respect to the cylinder 3a, and thereby discharges a content in the container from the discharge head 2, the discharge head 2 has a head body 2a and a screwing cylinder 2b mounted on the head body 2a, in the screwing cylinder 2b, a screwing part 5a for head side storage of the screwing cylinder 2b is screwed with a screwing part 5b for container side storage of the container side member 1a, and holds the pump 1 in a storage state more contracted than the expanded state in a state of being mounted on the head body 2a, and the pump 1 has a vapor deposition film in which formation is suppressed in the screwing part 5a for head side storage and the screwing part 5b for container side storage.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pump and a method for manufacturing the same.

Background Art

[0002] A pump having a container-side member attached to a container and a head-side member having a discharge head and reciprocable with respect to the container-side member, wherein by expanding and contracting in the cylinder axis direction between an extended state and a contracted state by a pressing operation on the discharge head, the piston is reciprocated with respect to the cylinder, and the contents in the container are discharged from the discharge head, and the discharge head holds the pump in a stored state that is contracted more than the extended state with the head-side storage screw portion of the discharge head screwed into the container-side storage screw portion of the container-side member. Such a pump is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A pump as described above may be subjected to a vapor deposition process for forming a vapor deposition film for decoration or the like. However, when the storage screw portion composed of the head-side storage screw portion and the container-side storage screw portion has a vapor deposition film, depending on the storage state of the pump in the storage state during circulation or the like, sticking may occur at the storage screw portion, and as a result, there is a risk that the operation for releasing the screwing at the storage screw portion becomes heavy at the start of use or the like. In addition, there is a risk of vapor deposition peeling due to screwing friction.

[0005] Therefore, an object of the present invention is to provide a pump and a method for manufacturing the same that can suppress sticking of the storage screw portion caused by the vapor deposition process and generation of vapor deposition peeling due to screwing friction.

Means for Solving the Problems

[0006] One embodiment of the present invention is as follows:

[0007] [1] A container side member that is attached to the container, A pump having a discharge head and a head-side member that is reciprocable relative to the container-side member, By pressing the discharge head, the piston reciprocates between an extended state and a retracted state in the cylinder axis direction, thereby discharging the contents of the container from the discharge head. The discharge head comprises a head body and a threaded cylinder attached to the head body. The screw-type cylinder has a head-side storage screw portion that is screwed into the container-side storage screw portion of the container-side member, and when attached to the head body, it holds the pump in a retracted storage state that is more contracted than the extended state. The screw tube and the container side member A pump having a vapor-deposited film whose formation is suppressed in the head-side storage screw portion and the container-side storage screw portion.

[0008] [2] The pump according to [1], wherein the threaded cylinder has a female threaded portion on its inner surface that constitutes the threaded portion for housing the head side.

[0009] [3] The pump according to [1] or [2], wherein the container-side member comprises a cylinder member having the cylinder and a restricting member having a threaded portion for storage on the container side, which is attached to the cylinder member to restrict the piston from coming out of the cylinder.

[0010] [4] A pump manufacturing method for manufacturing a pump described in any one of items [1] to [3], A vapor deposition process is performed by screwing the head-side storage threaded portion of the threaded cylinder into the container-side storage threaded portion of the container-side member, thereby forming the vapor-deposited film whose formation is suppressed in the head-side storage threaded portion and the container-side storage threaded portion. A pump manufacturing method comprising the steps of attaching the screwed cylinder, which is screwed into the container-side storage screwed portion, to the head body. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a pump and a method for manufacturing the same that can suppress the sticking of the storage screw portion caused by the vapor deposition process and the occurrence of vapor deposition peeling due to screw friction. [Brief explanation of the drawing]

[0012] [Figure 1] This is a partial cross-sectional side view showing a pump according to one embodiment of the present invention in a state prior to the installation process. [Figure 2] Figure 1 is a partial cross-sectional side view showing the pump after the installation process. [Figure 3] Figure 1 is a partial cross-sectional side view showing the pump in its initial state when it is first put into use. [Modes for carrying out the invention]

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0014] As shown in Figures 1 to 3, in one embodiment of the present invention, the pump 1 has a container-side member 1a that is attached to a container, and a discharge head 2 and a head-side member 1b that is reciprocable relative to the container-side member 1a. The pump 1 expands and contracts in the cylinder axis direction (vertical direction) between an extended state (the state shown in Figure 3) and a retracted state by pressing the discharge head 2, causing the piston 4 to reciprocate relative to the cylinder 3a, thereby discharging the contents of the container from the discharge head 2. The discharge head 2 has a head body 2a and a threaded cylinder 2b that is attached to the head body 2a. The threaded cylinder 2b has a head-side storage threaded portion 5a that is screwed into the container-side storage threaded portion 5b of the container-side member 1a, and when attached to the head body 2a, it holds the pump 1 in a retracted state (the state shown in Figure 2) that is more contracted than the extended state. The pump 1 has a vapor-deposited film (not shown) whose formation is suppressed in the head-side storage threaded portion 5a and the container-side storage threaded portion 5b. In other words, the vapor-deposited film is not formed in the head-side storage threaded portion 5a and the container-side storage threaded portion 5b, or it has a smaller thickness than in other parts.

[0015] With this configuration, by performing the vapor deposition process with the threaded cylinder 2b screwed onto the container-side member 1a before attaching it to the head body 2a, the threaded cylinder 2b functions as a vapor deposition mask, making it possible to realize a pump 1 having a vapor-deposited film whose formation is suppressed in the storage threaded portion 5, which consists of the head-side storage threaded portion 5a and the container-side storage threaded portion 5b. In such a pump 1, it is possible to suppress the sticking of the storage threaded portion 5 caused by the vapor deposition process and the occurrence of vapor deposition peeling due to threading friction. Therefore, the threading of the storage threaded portion 5 can be released with a light operation when starting use, so the pump 1 can be easily extended from the stored state. In addition, the impact on the appearance due to vapor deposition peeling can also be suppressed. Furthermore, with the above configuration, since the threaded cylinder 2b can function as a vapor deposition mask for the storage threaded portion 5, the need to separately prepare a mask as a jig for manufacturing the pump 1 can be reduced.

[0016] In the present embodiment, for the sake of convenience of explanation, the cylinder axial direction along the central axis O of the cylinder 3a is also referred to as the vertical direction, the direction from the discharge head 2 toward the cylinder 3a is also referred to as the downward direction, and the opposite direction is also referred to as the upward direction.

[0017] The threaded cylinder 2b has a female thread portion forming the head-side housing threaded portion 5a on its inner peripheral surface. According to such a configuration, the female thread portion forming the head-side housing threaded portion 5a can be accurately formed when the threaded cylinder 2b is formed, so that the housing threaded portion 5 with a high overrunning torque, which is the limit torque causing backlash due to excessive tightening of the screw, can be realized. However, the pump 1 is not limited to such a configuration.

[0018] The container side member 1a includes a cylinder member 3 having a cylinder 3a, and a regulating member 6 having a container-side housing threaded portion 5b and attached to the cylinder member 3 to regulate the withdrawal of the piston 4 from the cylinder 3a. According to such a configuration, the container-side housing threaded portion 5b can be formed with a simple structure using the regulating member 6. However, the pump 1 is not limited to such a configuration.

[0019] As a pump manufacturing method for manufacturing the pump 1, a vapor deposition process is performed in a state where the head-side housing screw portion 5a of the screw cylinder 2b is screwed into the container-side housing screw portion 5b of the container-side member 1a (the state shown in FIG. 1), thereby forming a vapor deposition film with suppressed formation in the head-side housing screw portion 5a and the container-side housing screw portion 5b. And an attachment process of attaching the screw cylinder 2b in a state of being screwed into the container-side housing screw portion 5b to the head main body 2a as shown in FIG. 2. A pump manufacturing method may be used. According to such a configuration, the screw cylinder 2b is screwed into the head-side housing screw portion 5a, used as a mask for vapor deposition treatment, and the pump 1 can be efficiently manufactured by a small number of steps of attaching the head main body 2a to the screwed screw cylinder 2b. That is, in the case of the conventional configuration, the mask removal process after the vapor deposition treatment, which is required, can be omitted. By the attachment process, the screw cylinder 2b is integrated with the discharge head 2 and the pump 1 is held in the storage state as it is. As shown in FIG. 3, by rotating the discharge head 2 at the start of use to unscrew the storage screw portion 5, the screw cylinder 2b moves to the discharge head 2 and the pump 1 becomes an extended state where it can be used.

[0020] The head-side member 1b has a stem 7 that can reciprocate vertically with respect to the cylinder 3a along with the piston 4, and the head main body 2a is attached to the upper end portion of the stem 7. Further, the head main body 2a has a fitting cylinder portion 8 that fits onto the outer peripheral surface of the screw cylinder 2b from above to restrict the vertical movement and the circumferential rotation of the cylinder with respect to the screw cylinder 2b. According to such a configuration, the attachment process can be easily realized by caulking and setting the fitting cylinder portion 8 to the screw cylinder 2b.

[0021] The container-side member 1a has a mounting cap 9 that is attached to the container to hold the cylinder member 3 in place. The cylinder member 3 has a flange 3b that protrudes outward in the radial direction from the upper end of the cylinder 3a, and an end cylinder 3c that protrudes upward from the upper end of the cylinder 3a and is concentric with the cylinder 3a. The mounting cap 9 has a peripheral wall portion 9a that is attached to the outer circumferential surface of the mouth of the container, and a top wall portion 9b that extends inward in the radial direction from the upper end of the peripheral wall portion 9a and forms an annular shape concentric with the cylinder 3a. The flange 3b of the cylinder member 3 is held between the lower surface of the top wall portion 9b of the mounting cap 9 and the top surface of the mouth. The restricting member 6 has a mounting portion 6a that fits onto the end cylinder 3c from above, restricting upward disengagement and rotation in the cylinder circumferential direction relative to the end cylinder 3c; a disengagement restricting portion 6b that protrudes inward from the mounting portion 6a beyond the inner circumferential surface of the cylinder 3a in the cylinder radial direction; a mounting cap restricting portion 6c that extends outward from the mounting portion 6a in the cylinder radial direction and faces the top surface of the mounting cap 9; and a threaded circumferential wall 6d that protrudes upward from the mounting portion 6a and is concentric with the cylinder 3a. The container-side storage threaded portion 5b is provided on the outer circumferential surface of the threaded circumferential wall 6d. With such a configuration, the structure of the pump 1 can be simplified. However, the pump 1 is not limited to this configuration.

[0022] The container-side storage threaded portion 5b is composed of a male thread. This configuration allows for increased overrun torque of the storage threaded portion 5. However, the pump 1 is not limited to this configuration.

[0023] The vapor deposition treatment is performed on at least the threaded cylinder 2b and the regulating member 6 in the state where it is threaded thereto. The mounting cap 9, stem 7, discharge head 2, etc., may also be subjected to vapor deposition treatment. Furthermore, these components may be subjected to vapor deposition treatment while assembled to the regulating member 6, or they may be subjected to vapor deposition treatment separately.

[0024] The discharge head 2, stem 7, cylinder member 3, regulating member 6, and mounting cap 9 can each be made of, for example, synthetic resin.

[0025] The present invention is not limited to the embodiments described above, and can be modified in various ways without departing from its essence.

[0026] Therefore, the pump 1 of the above-described embodiment is a pump 1 having a container-side member 1a attached to a container, and a discharge head 2 and a head-side member 1b that is reciprocable relative to the container-side member 1a, wherein the contents of the container are discharged from the discharge head 2 by causing the piston 4 to reciprocate relative to the cylinder 3a by expanding and contracting in the cylinder axis direction between an extended state and a contracted state by a pressing operation on the discharge head 2, the discharge head 2 has a head body 2a and a threaded cylinder 2b attached to the head body 2a, the threaded cylinder 2b has a head-side storage threaded portion 5a that is screwed into the container-side storage threaded portion 5b of the container-side member 1a, and when attached to the head body 2a, the pump 1 is held in a contracted state that is more contracted than the extended state, and the pump 1 is modifiable as long as it has a vapor-deposited film whose formation is suppressed in the head-side storage threaded portion 5a and the container-side storage threaded portion 5b. [Explanation of Symbols]

[0027] 1 pump 1a Container side member 1b Head-side member 2 Discharge heads 2a Head body 2b Threaded tube 3 Cylinder Member 3a Cylinder 3b Flange 3c End tube 4 pistons 5. Threaded compartment for storage 5a Screw-in part for storage on the head side 5b Threaded part for storage on the container side 6 Regulating members 6a Mounting part 6b Escape Control Section 6c Mounting cap regulation section 6d Threaded surrounding wall 7 Stem 8. Fitting cylinder section 9. Mounting cap 9a Peripheral wall 9b Top wall O Central axis

Claims

1. A container side member that is attached to the container, A pump having a discharge head and a head-side member that is reciprocable relative to the container-side member, By pressing the discharge head, the piston reciprocates between an extended state and a retracted state in the cylinder axis direction, thereby discharging the contents of the container from the discharge head. The discharge head comprises a head body and a threaded cylinder attached to the head body. The screw-type cylinder has a head-side storage screw portion that is screwed into the container-side storage screw portion of the container-side member, and when attached to the head body, it holds the pump in a retracted storage state that is more contracted than the extended state. The screw-type cylinder and the container-side member have a vapor-deposited film whose formation is suppressed in the head-side storage screw-type portion and the container-side storage screw-type portion, respectively, in the pump.

2. The pump according to claim 1, wherein the threaded cylinder has a female threaded portion on its inner surface that constitutes the threaded portion for housing the head side.

3. The pump according to claim 1, wherein the container-side member comprises a cylinder member having the cylinder and a restricting member having a threaded portion for storage on the container side, which is attached to the cylinder member to restrict the piston from coming out of the cylinder.

4. A pump manufacturing method for manufacturing a pump according to any one of claims 1 to 3, A vapor deposition process is performed by screwing the head-side storage threaded portion of the threaded cylinder into the container-side storage threaded portion of the container-side member, thereby forming the vapor-deposited film whose formation is suppressed in the head-side storage threaded portion and the container-side storage threaded portion. A pump manufacturing method comprising the steps of attaching the screwed cylinder, which is screwed into the container-side storage screwed portion, to the head body.

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