JP3003888U - Waterproof padlock - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a waterproof padlock that can be mass-produced at low cost. [Structure] The waterproof padlock of the present invention has a hook 2 for locking which has an inverted U-shaped upper part fitted in a lock body 1 and has shaft holes 1b, 1c for vertically moving the hook 2 on the upper part. An inverted U-shaped hook 2 that is bent into a bifurcated shape in a punched padlock
When the hook 2 is pushed in, straddling the left and right rods 2a, 2b of the lock body 1, the seal end portions 4a, 4b of the hem can be extended to a length that is slightly pressed against the top end surface 1a of the lock body 1. It is configured by applying a seal member 4 integrally formed of a flexible material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a padlock for preventing rainwater and the like from entering a gap formed between a hook portion and a shaft hole.

[0002]

[Prior art]

 Conventionally, a small gap is created between the hook part of the padlock and the shaft hole formed on the upper surface of the lock body. Metals are oxidatively eroded, and dust intrusion causes clogging, which is a major factor that causes failures and shortens product life.

Therefore, conventionally, a waterproof padlock has been proposed. For example, a concentric groove or a concentric circular ridge is formed around the hook through hole of the outer casing, and the hook has a circular groove or a concentric circle corresponding to the ridge. There has been proposed a waterproof padlock in which a rubber body having a projection or a groove formed on the lower surface is mounted at a position where the lower surface of the rubber body is in close contact with the outer casing in a locked state (Japanese Utility Model Publication No. 63-14766).

[0004] Although it is not a device designed for waterproofing, a proposal has also been made to cover the padlock hook with a flexible film to prevent surface damage and noise from vibration. (Japanese Utility Model Publication No. 57-89663).

[0005]

[Problems to be solved by the device]

 However, in the former waterproof padlock, the metal hook and the outer casing are cut because the groove for locking the rubber body is formed in the hook and the circular groove is formed in the top end surface of the outer casing. It has to be ground, which complicates the process and raises the unit price of the product. The latter, which is coated with a flexible film, merely aims to protect the surface and prevent the generation of noise, and has no waterproof function at all.

Therefore, the present invention is to develop a padlock that is easy to process and exhibits a reliable waterproof function.

[0007]

[Means for Solving the Problems]

 The proposed padlock has a hook that has an inverted U-shaped upper part and is fitted inside the lock body. The padlock has a shaft hole for pushing the hook in the upper part. Of the flexible U-shaped hook with the end of the seal formed so as to straddle the left and right rods of the inverted U-shaped hook and come into contact with the top end surface of the lock body and be slightly pressed when the hook is pushed. It is constructed by applying a seal member. It is preferable that the end portion of the seal member is formed in a skirt-expanding shape, and the bottom surface of the end portion is in a suction cup shape.

[0008]

[Action]

 After hooking the object to be locked and pushing the hook into the lock body against the spring, the top end surface of the lock body and the bottom surface of the end of the seal member attached to the hook come into contact with each other, and When the seal member is pressed, the key hole at the tip of the hook and the hooking hook are hooked. Then, the seal member formed of a flexible material temporarily contracts or bends due to the pressing force, and then repels due to the elastic restoring force, but at that time, the hook splits into left and right rods in a bifurcated shape. Therefore, the seal end acts as a reaction point at the same time as the action point, and the seal end is strongly pressed against the top end face, and as a result, the competing force of the seal member and the lock body is Improves adhesion with the top surface and prevents rainwater from entering. At that time, if the end of the seal member is expanded to the hem, the contact area between the top end surface of the lock body and the seal member is increased, and if the bottom surface is formed into a suction cup shape, the adhesion is further improved. Improve. Further, in forming the seal member, the lock main body and the hook do not need to be cut, and the hook may be covered with the flexible seal member, which facilitates the production.

[0009]

【Example】

 Reference numeral 1 is a lock body, and a hook 2 for locking which is bent in an inverted U shape by bifurcated rods 2a and 2b is fitted therein, and a spring 3 for pushing the hook 2 is built therein. A keyway 2c for locking is formed at one end of the inverted U-shaped bent portion of the hook 2, and a locking claw 5 that engages with the keyway 2c is built into the lock body 1 together with a spring 6. It

A top end surface 1a is formed on the top of the lock body 1 as a relatively flat surface, and shaft holes 1b and 1c for fitting the hook 2 are formed on the top end surface 1a.

Further, the hook 2 is bent in an inverted U shape as described above, one of which is elongated through the inside of the lock body 1 and the other of which is formed short by forming the keyway 2c. , Are attached to the shaft holes 1b and 1c according to their respective lengths.

The present invention covers the flexible U-shaped bent portion of the hook 2 with the flexible seal member 4 and pushes the hook 2 against the spring 3. The seal ends 4a and 4b are formed in such a length that they are in contact with the top end surface 1a of the lock body 1 and are pushed back a little and pressed against each other. That is, the seal member 4 made of a flexible material is provided across the left and right rods 2a and 2b of the inverted U-shape bent in a bifurcated shape, and when the hook is pushed in at the time of locking, the top end surface 1a is The contacted seal ends 4a, 4b are pressed, and the seal ends 4a, 4b are adjusted to a length that causes the flexible seal member 4 to contract or bend. If this length is insufficient, there is little contraction or bending and the repulsive force is insufficient, and if it is too long, the pushing of the hook 2 is obstructed and the locking is disabled, so a balance between the two is achieved. If the padlock has a general size, for example, the shape of the lock body is a rectangle having a width of 40 mm and a length of 32 mm, the seal ends 4a and 4b are further pressed at the point of contact with the lock body at the time of pushing. It is preferable that the length is about 1.5 mm.

Since this seal member is in close contact with the top end surface 1a of the lock body to prevent rainwater and the like from entering through the shaft holes 1b and 1c, the seal member is used to enhance the seal effect. It is preferable that the bottom ends 4a and 4b are flared and the bottom surface is formed as flat as possible. Further, the seal end may be formed in the shape of a suction cup with a slight recess so that the vacuum suction effect is exerted when pressed.

The term “flexible material” as used herein means that, when pressed by the top end surface 1a, the entire seal member 4 contracts or bends slightly, and the seal member 4 contracts or shrinks due to a reaction between the seal end portions 4a and 4b. It is a material that has the ability to push back against flexure, and in that sense, synthetic resin that is too soft and has no repulsive force, or elastic body that has excessive absorbency is not suitable. Specifically, it is preferable to use a slightly soft synthetic resin or elastic rubber. For example, a synthetic resin such as vinyl chloride or polyethylene can be used. Transparent resins are generally used, but colored ones are also preferable in terms of design.

Next, the operation of the embodiment of the present invention will be described. Prior to locking, the hook 2 is disengaged from the latching claw 5, and is pushed by the spring 3 to be in a floating state (Fig. 2).

After hooking the hook 2 on the object to be locked and pushing the hook 2 against the spring 3 of the lock body 1, the seal member applied to the top end surface 1 a of the lock body 1 and the hook 2 The bottom surfaces of the seal end portions 4a and 4b of No. 4 are in contact with each other, and when the hook 2 is pressed, the key groove 2c and the hook 5 are hooked. Then, the seal member 4 formed of a flexible material contracts or bends the entire seal member 4 by the pressing force, and then repels by the elastic restoring force. When the one end face is pressed, the other end face supports the force and the other end face is pressed because it is divided into two forks across the left and right rods 2a, 2b of the character hook. Works as well. That is, the seal end portions 4a and 4b simultaneously act as reaction points, and the flexible material and the seal end portions 4a and 4b cooperate to exert a repulsive force. -The end portion of the lever is strongly pressed against the top surface 1a (see FIG. 3). As a result, the competing force enhances the adhesion between the seal member and the top end surface of the lock body, and completely prevents rainwater and dust from entering.

At this time, if the seal end portions 4a and 4b are expanded to the bottom, the bottom surface becomes a flat surface as much as possible, and the contact area with the top end surface of the lock body increases, and further, the end portions. If the bottom surface is formed in the shape of a suction cup with a slight recess, a vacuum suction effect is exerted during pressing, and the adhesion is further improved.

In addition, in places where there is freezing in winter, invading water freezes and locking or unlocking becomes impossible, but this is also prevented beforehand.

Further, in the manufacture thereof, the lock main body remains the same as before, and only the seal member needs to be molded and attached to the hook, which is troublesome for cutting metal. No process is required, and mass production is possible at low cost.

[0020]

[Effect of device]

 The present invention prevents rainwater and dust from entering, and eliminates the erosion effect due to oxidation and clogging, so it has the excellent effect of eliminating the cause of failure and significantly extending the product life. To do. Further, the manufacture of the lock body does not require any processing, and since only the seal member can be mass-produced, it has an economical effect such that it can be provided at an extremely low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of the present padlock.

FIG. 2 is a side view showing a state where the hook of the padlock of the present invention is floating.

FIG. 3 is a side view showing a state in which the hook of the padlock of the present invention is locked.

[Explanation of symbols]

 1 Lock body 1a Top surface 1b, 1c Shaft hole 2 Hooks 2a, 2b Rod 4 Seal member 4a, 4b Seal end

Claims (3)

[Scope of utility model registration request] 1. A padlock in which a locking hook having an inverted U-shaped upper part is fitted in a lock body, and a shaft hole for pushing the hook is formed in the upper part of the lock body. A flexible material that extends over the left and right rods of the bent inverted U-shaped hook, and has a seal end formed to a length that is slightly pressed against the top end surface of the lock body when the hook is pushed. A waterproof padlock that is characterized by applying a seal member. 2. The seal end portion is formed to have a skirt-expanded shape.
Waterproof padlock as described. 3. The waterproof padlock according to claim 1, wherein the bottom surface of the end of the seal is formed in a suction cup shape.