JP2004285706A - Pad lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pad lock which enables accurate exchange of plugs through simple operation. <P>SOLUTION: The pad lock is formed of a case 1 having a socket hole 2 formed therein, a shackle 3 inserted into/extracted from the socket hole 2, and the plug 5 installed in a plug housing hole 4 of the case 1, for locking the shackle 3 at an insertion location. According to the structure of the pad lock, the plug 5 has a pocket 6 formed in an outer peripheral surface thereof, in which a set pin 7 is housed in a protrudable/retractable manner, and the plug housing hole 4 has a pin receiving hole 8 formed in an inner peripheral surface thereof, followed by engaging the set pin 7 which is energized in a protruding direction by a spring member 9, with the pin receiving hole 8, to thereby constrain the plug 5 in the pin receiving hole in an inextricable manner. Then the case has a tool insertion hole linearly formed therein along an extension of the pin receiving hole 8, and the tool insertion hole 10 is blocked with the shackle 3, followed by linearly pressing the set pin 7 pressed by an exchanging tool 11 which has been inserted into the tool insertion hole 10 when the shackle 3 is extracted, whereby the plug is retracted in the pocket 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shackle which is locked at a plug-in position in a socket hole of a case by a plug having a built-in locking mechanism and which unlocks a locking shaft of the plug by a key. The present invention relates to a padlock that is released and protrudes to a removal position.
[0002]
2. Description of the Related Art As a padlock in which a plug can be replaced when a key is lost or imitated, a locking seat protrudes from a bottom cover of a case corresponding to the bottom of one socket hole. A lateral groove for fitting a plug therein is provided on the upper end surface of the plug, a fitting recess is provided in the outer peripheral surface of the plug corresponding to the lateral groove, and the plug is pressed toward the outer peripheral surface of the plug by a compression coil spring inserted in the lateral groove. There has been known a connector in which the tip of a fitting plug is engaged with a fitting recess to fix and hold a plug in a plug receiving hole of a case (for example, see Patent Document 1).
[0003]
With this padlock, for example, if you want to replace the plug because you have lost your regular key, insert a spare key into the key hole of the rotor of the plug, turn the rotor with the key to unlock the shackle, and insert the shackle into the socket. Protrude from the hole. Then, the bar-shaped replacement tool is inserted into the upper opening of the lateral groove through the empty socket hole, and the tip of the replacement tool is inserted into the annular groove of the head of the fitting plug. By moving the fitting plug, the fitting plug is pulled out of the fitting recess against the bias of the compression coil spring.
[0004]
However, in the dimly concealed space at the inner bottom of the socket hole, the operation of inserting the tip of the replacement tool through the upper opening of the lateral groove into the annular groove of the fitting plug is not practically easy anyway on the design drawing. Even if the tip of the replacement tool can be inserted into the annular groove once, the hand of the replacement tool may be shaken when the replacement tool is moved laterally, or the replacement tool may bend in the middle. The tip of the tool easily comes off the annular groove, and it is not easy to quickly and accurately pull out the fitting plug from the fitting recess.
[0005]
[Patent Document 1] Japanese Patent No. 2911880
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a padlock in which a plug can be easily and accurately replaced by a replacement tool.
[0007]
The padlock according to the present invention is described below with reference to the reference numerals in the accompanying drawings. The shackle 3 is inserted into and removed from the socket hole 2 of the case 1, and the plug receiving hole 4 of the case 1 is provided. And a plug 5 for locking the shackle 3 at the insertion position. The set pin 7 is received and held in a pocket 6 formed on the outer peripheral surface of the plug 5 so as to be able to protrude and retract. A pin receiving hole 8 is formed in the surface, and the pin 5 is projected and urged by a spring member 9 so that the set pin 7 is engaged with the pin receiving hole 8 to restrain the plug 5 from being withdrawn from the plug receiving hole 4. The tool insertion hole 10 is formed linearly on the extension line, and the tool insertion hole 10 is closed by the shackle 3.
[0008]
In this padlock, when it is desired to replace the plug 5 as a result of, for example, losing a common key, the spare key 12 is inserted into the key hole 27 of the rotor 13 of the plug 5 and the rotor 13 is The shackle 3 is unlocked by being turned, and the shackle 3 is projected from the socket hole 2.
[0009]
The replacement tool 11 is inserted into the tool insertion hole 10 that has been opened by removing the shackle 3, and the set pin 7 is pressed linearly toward the outer peripheral surface of the plug 5 by pushing the replacement tool 11. The set pin 7 escapes from the pin receiving hole 8 and retreats into the pocket 6.
[0010]
The retraction of the set pin 9 releases the restriction of the plug 5 to the case 1, and the plug 5 is pulled out of the plug receiving hole 4.
When a new plug 5 is fitted into the plug receiving hole 4, the set pin 7 is pushed and held in the pocket 6 with a fingertip. When the plug 5 is fitted to a predetermined position of the plug receiving hole 4 and the pocket 6 and the pin receiving hole 8 come to a position facing each other, the tip of the set pin 7 is pushed by the spring member 9 so that the set pin 7 has the pin receiving hole 8. Engages immediately. Thus, the replacement of the plug 5 is completed.
[0011]
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIGS. 1 and 2, the plug 5 has a cylinder lock configuration, and the plug body 14 has an oval cross section and is non-rotatably fitted into the same-shaped plug receiving hole 4. Have been. A rotation angle regulating plate 15 and a cam disk 16 are fitted to the tip of the rotor 13, and a passive cam groove 19 of a latch body 18 is fitted to an eccentric cam projection 17 of the cam disk 16.
Each leg of a U-shaped shackle 3 is fitted into socket holes 2 and 2 formed on both left and right sides of the plug housing hole 4. The tip of the latch body 18 is engaged with and disengaged from the side groove 20 of the right short leg.
[0012]
An annular groove 22 is formed in the longer leg on the left side for engaging with a locking ball 21. A spring guide 3a extended at the end of the leg is disposed so as to cross the tool insertion hole 10. When the shackle 3 is at the insertion position, the tool insertion hole 10 is closed.
When the rotor 13 of the plug 5 is turned in the unlocking direction with a key, the latch body 18 comes out of the side groove 20, whereby the lock of the shackle 3 to the case 1 is released, and the shackle 3 is attached with the pushing spring 23. Pressed by the force, the shorter leg is pulled out of the socket hole 2.
[0013]
When the shackle 3 protrudes to the unlocking position in this manner, the spring receiving rod portion 3a of the longer leg is retracted to a position pulled out of the tool insertion hole 10, and the insertion of the bar-shaped replacement tool 11 is stopped. It becomes possible.
The pocket 6 is formed at a right angle to the center axis of the plug 5, and the set pin 7 having a large diameter at the base causes the opening edge of the pocket 6 to be crimped inward after being inserted into the pocket 6. This prevents the pocket 6 from falling off. The spring member 9 is constituted by a compression coil spring.
[0014]
In the embodiment shown in FIGS. 3 and 4, the eccentric projection 25 of the locking disk 24 interlocked with the rotor 13 engages with a lock receiving groove 26 formed transversely on the side surface of the longer leg of the shackle 3. As a result, the shackle 3 is locked so that it cannot be removed. When the predetermined key 27 is inserted into the key hole 27 of the rotor 13 and the rotor 13 is rotated by a predetermined angle, the eccentric projection 25 moves to the outside of the lock receiving groove 26, so that the shackle 3 is removed from the socket hole 2 of the case 1. It becomes possible.
[0015]
In this embodiment, the tool insertion hole 10 is formed on the extension of the socket hole 2 into which the shorter leg is inserted and withdrawn, and the tool insertion hole 10 is concealed and closed by the leg.
After unlocking the shackle 3 to the case 1 as described above and pulling out the shorter leg of the shackle 3 from the socket hole 2, the bar-shaped replacement tool 11 is inserted into the tool insertion hole 10 through the socket hole 2. Then, the set pin 7 is linearly pressed and pushed into the pocket 6.
[0016]
As the lock mechanism incorporated in the plug 5, a well-known lock mechanism such as a disk tumbler type lock mechanism, a pin tumbler type lock mechanism, or an axial pin tumbler type lock mechanism can be appropriately selected and used, and the rotor of the plug 5 and the shackle 3 can be used. The interlocking mechanism or locking mechanism between them is also limited to the above, and a known mechanism used for a general padlock can be appropriately selected.
[0017]
By forming a cam slope at the tip end of the set pin 7, a latch operation type is formed. When the plug 5 is fitted, the cam face is slidably contacted with the edge face of the plug receiving hole 4 to move the set pin 7 forward and backward. By operating, the set pin 7 can be automatically engaged with the pin receiving hole 8 when the plug 5 is completely fitted.
[0018]
In addition, the operating principle of the padlock is not limited to a method in which when the shackle slides at a constant stroke, only the shorter leg comes out of the socket hole, and the shackle rotates around the longer leg. When the shackle slides by a fixed stroke, both legs of the shackle may simultaneously come out of the socket hole.
[0019]
As described above, in the padlock of the present invention, the set pin 7 is received and held in the pocket 6 formed on the outer peripheral surface of the plug 5 so as to be able to protrude and retract, and the pin receiving hole 8 is formed in the inner peripheral surface of the plug receiving hole 4. The set pin 7 projected and urged by the spring member 9 is engaged with the pin receiving hole 8 to restrain the plug 5 from being removed from the plug receiving hole 4, and the tool insertion hole is provided on the extension of the pin receiving hole 8. 10 is formed linearly, the tool insertion hole 10 is closed by the shackle 3, and the set pin 7 is linearly pressed by the replacement tool 11 inserted into the tool insertion hole 10 in the state where the shackle 3 is removed, and the tool is inserted into the pocket 6. Since the set pin 7 is retracted, even if the set pin 7 is arranged in a dimly-lit and hardly visible region, the set pin 7 can be quickly and accurately set by a simple operation of simply pushing the replacement tool 11 straight. Can be moved to Shisabotsu position, it can be performed with good smooth and efficient replacement work of the plug 5.
[Brief description of the drawings]
FIG. 1 is a cutaway front view of a main part of a padlock according to one embodiment of the present invention, in which a shackle is in a locking position.
FIG. 2 is a left side view of the padlock of FIG.
FIG. 3 is a longitudinal sectional view of a padlock according to another embodiment of the present invention, wherein a shackle is in a locked position.
FIG. 4 is a plan view of the padlock of FIG. 3 in a state where a shackle is removed.
[Explanation of symbols]
1 Case 2 Socket Hole 3 Shackle 3a Spring Guide 4 Plug Housing Hole 5 Plug 6 Pocket 7 Set Pin 8 Pin Receiving Hole 9 Spring Member 10 Tool Insertion Hole 11 Replacement Tool 12 Key 13 Rotor

Claims (1)

The shackle 3 is inserted into and removed from the socket hole 2 of the case 1, and the plug 5 is provided in the plug accommodating hole 4 of the case 1 and locks the shackle 3 at the insertion position. The set pin 7 is received and held in the pocket 6 so as to be able to protrude and retract, a pin receiving hole 8 is formed in the inner peripheral surface of the plug receiving hole 4, and the set pin 7 protruded and urged by the spring member 9 is engaged with the pin receiving hole 8. Then, the plug 5 is restrained so as not to be removed from the plug receiving hole 4, the tool insertion hole 10 is formed linearly on the extension of the pin receiving hole 8, the tool insertion hole 10 is closed by the shackle 3, and the shackle 3 is removed. A padlock in which the set pin 7 is linearly pressed by the replacement tool 11 inserted into the tool insertion hole 10 in the state to be retracted into the pocket 6.

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