JP2002276211A - Lock structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a theft by picking while keeping the equipment cost low. SOLUTION: A key opening 30 comprises protruding guide pieces 31 and 32 on a side edge thereof, and a locking tongue piece 20 comprises a lateral groove 25 of a prescribed length guide by the protruding guide pieces and a vertical groove 28 substantially right-angled to the lateral groove on the side surface. The lateral groove 25 is often provided so as to extend from the side surface upper end of the tongue piece 20 to the side surface lower end thereof. The protruding guide pieces provided on the side edge of the key opening are often formed of the first protruding piece 31 for guiding the upper end surface of the lateral groove and the second protruding piece 32 for guiding the lower end of the sliding groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for opening and closing various doors and drawers (wings), and more particularly to a structure for preventing forced prying from the outside.

[0002]

2. Description of the Related Art Various doors, for example, lockers such as saunas and golf courses, are installed in places where third parties other than the user can freely enter and exit, and the monitoring system is not always sufficient. The same applies to office building doors and desk drawers.

[0003] Accordingly, various locks are provided on such a wing (hereinafter described with a locker door as an example) to prevent theft. Conventionally proposed technologies include:
For example, a system that enhances the safety of a lock device by making it difficult to unlock a key device (Japanese Patent Laid-Open No. 09-0493)
55 etc.). These prior arts are techniques for improving the softness of an electric / electronic lock device that mainly controls locking and unlocking of the lock device.

[0004] On the other hand, there has not been a technical proposal for theft in which the door of a locker is forcibly opened with a bar or the like. According to the actual situation of the theft accident, it is said that locking can be performed using any complicated electronic lock system. A simple operation is required in the locker structure. As a measure to be taken when forced prying is performed, for example, JP-A-2000-22
Actually, there is only a means of issuing an alarm using a sensor as in 5052.

[0005]

However, lockers used in various ways, such as pay / free lockers installed in station yards and resort facilities, are individually provided with an alarm device linked with a sensor or have a complicated structure. It is not realistic to introduce a lock device that requires a proper number input.

[0006] This is because the sensor-linked alarm device surely raises the cost of the locker equipment, causes a failure, and raises concerns about maintenance costs. Also,
Various improvements based on the electronic lock can be said to be excellent technologies unless assuming theft by forcible opening, but they are ineffective against theft technology that opens the locker door itself with external force.

SUMMARY OF THE INVENTION An object of the present invention is to reliably prevent theft by forcible opening while keeping the equipment cost inexpensive on the premise of a lock structure by moving a tongue piece (lot) forward and backward.

[0008]

In order to achieve the above object, a lock structure according to the present invention is provided with a protruding guide piece on a side edge of a key opening, while the protruding guide piece is provided on a side surface of a locking tongue. A predetermined length of the lateral groove to be guided is provided, and a vertical groove substantially perpendicular to the lateral groove is provided.

The vertical groove may be provided so as to penetrate from the upper end of the side surface of the tongue for locking to the lower end of the side surface. Further, the projecting guide pieces provided on the side edges of the key opening are constituted by a first projecting piece for guiding the upper end face of the lateral groove and a second projecting piece for guiding the lower end face of the sliding groove. There are cases.

[0010]

In the lock structure according to the present invention, a projecting guide piece is provided in the key opening of the door. Then, when the locking tongue is moved forward and backward by a key operation, the lateral groove of the locking tongue is guided by the projecting guide piece, so that the tongue shows a smooth movement.

On the other hand, when the door is to be pry open using a forcing device such as a crowbar, the door is operated so as to move (rotate) toward the perpetrator of the crime with the hinge as the center of rotation. At this time, the protruding guide piece provided on the side face of the key opening has entered the concave portion of the lateral groove of the locking tongue piece. Then, the locking tongue crushes (deforms) the projecting guide piece by the movement of the door.

On the other hand, the locking tongue has a vertical groove substantially perpendicular to the horizontal groove. For this reason, even if it tries to open a door further in the state where the protruding guide piece was deformed, the deformed protruding guide piece is caught in the vertical groove, and the forced opening of the door becomes impossible.

A second aspect of the present invention is a structure in which the vertical groove is penetrated from the upper end surface to the lower end surface of the locking tongue.
With such a vertical groove structure, an unexpectedly large external force is applied, the projecting guide piece is completely crushed, and even if the vertical groove portion in the vicinity perpendicular to the horizontal groove is not sufficiently caught, The edge of the panel material forming (defining) the key opening fits into the vertical groove, thereby preventing the forcible opening operation of the door.

A third aspect is the structure of the projecting guide piece.
The protruding guide piece provided in the door opening is formed with a thickness (strength) enough to be deformed by a forced prying operation, but the shape is basically not limited. However, in order to ensure smooth advance and retreat of the locking tongue, it is more structurally advantageous to form the upper and lower guide pieces than a single guide piece structure. This is because, for example, it is easy to adjust / design the degree of deformation of the protruding guide pieces, such as material selection and thickness setting of the panel to be used.

In addition, when the projecting guide piece is constituted by the two upper and lower projecting guide pieces, the upper and lower width dimensions can be made relatively larger than when the projecting guide piece is constituted by one thin panel. In many cases, favorable results are obtained in achieving smooth forward / backward movement. If the vertical width of the horizontal groove is insufficient, the possibility that the projecting guide piece is likely to be easily caught in the vertical groove in a normal use state increases.

[0016]

1 to 4 show an embodiment of a lock structure according to the present invention, and FIG. 5 shows a locker to which the present invention is applied.

As shown in FIG. 5, the lock structure according to the present invention comprises, for example, two upper and lower locking tongues 20 interlocking with a locking handle 14 arranged on the door 12 of the locker 10, and Applies to the part of the key opening (not shown) that enters. Reference numeral 16 denotes a link rod that moves the upper and lower two locking tongue pieces 20 forward and backward following the locking handle 14. A link rod 16 is provided near the locking / unlocking handle 14.
A keyhole (not shown) for restricting the movement of the lock tongue piece 20 to maintain the locked state is provided.

In the case of such a locker 10, the locking tongue piece 20 is provided on the door side, and the key opening is provided on the front frame F of the locker body. Since the upper and lower locking tongue pieces 20 and the key opening may have the same structure, one structure will be specifically described below.

FIG. 1 exemplifies a characteristic portion of a lock structure according to the present invention. Reference numeral 20 denotes a locking tongue, reference numeral 30 denotes a key opening, and reference numerals 31 and 32 denote projection guide pieces.

First, the locking tongue piece 20 is formed, for example, from a thick metal plate into a substantially rectangular shape. And
The lateral groove 25 and the vertical groove 28 are formed on the side surface 51 along the direction of movement indicated by the arrow B by, for example, cutting. In this embodiment, the locking tongue piece 20 is provided on the door 12 side.

It is desirable that the width of the lateral groove 25 be determined in accordance with the depth of entry of the locking tongue piece 20. In this embodiment,
The lock tongue piece 20 is moved to the position indicated by reference
, The groove is formed only up to the position of the symbol S, but the effect is the same even if the lateral groove (25) is formed farther from this position. That is, the lateral groove (25) may penetrate from the left end to the right end of the locking tongue piece 20. When the transverse groove 25 is formed by cutting, a slight dimensional error may occur. However, no problem occurs when the transverse groove is formed to be deeper than the expected position where the locking tongue piece 20 enters. The lateral groove 25 is
The locking tongue piece 20 has a linear shape in order to be able to move forward and backward.

The vertical groove 28 is, in terms of its original function, the horizontal groove 2.
It is sufficient that several millimeters (for example, 10 to 20 mm) exist at the upper and lower positions of 5. Projecting guide piece 3 deformed by forced external force
This is because it is only necessary that the first and second doors 32 have a structure in which the first and second doors are caught in the vertical groove 28 by an excessive door opening movement. However, in consideration of the molding cost, the vertical groove 28 is preferably formed by cutting. In this case, it is easier to form the vertical groove 28 with a certain margin of dimension than to specify the minimum molding dimension.

As described above, in the case where an unexpectedly strong external force is applied and the projecting guide pieces 31 and 32 are crushed extremely small, if the vertical groove 28 penetrates to both upper and lower end surfaces, the projecting guide is Even if the suppression by the pieces 31 and 32 is not sufficiently effective, the possibility that the end of the defining panel of the key opening 30 is caught in the vertical groove 28 and the door opening is prevented is increased. Therefore, in the present embodiment, the vertical groove 28 is formed linearly so as to penetrate from the upper end surface 53 to the lower end surface 55 of the locking tongue piece 20 on the same surface as the surface 51 on which the horizontal groove exists.

The depth of the horizontal groove 25 and the vertical groove 28 is designed according to the size of the projecting guide pieces 31 and 32. For example, when the protrusion dimensions of the protrusion guide pieces 31 and 32 are 3 mm, at least the depth of the lateral groove 25 is set to 3 mm or more, for example, 4 mm. This is because, in order to guarantee smooth movement of the locking tongue piece 20, it is preferable that the tips of the protruding guide pieces 31, 32 do not contact the bottom surface of the lateral groove 25.

The vertical groove 28 may have such a depth that the protruding guide pieces 31, 32 are hooked after the protruding guide pieces 31, 32 are crushed by a forced external force. For example, if it is assumed that the projecting dimensions of the projecting guide pieces 31 and 32 are 3 mm and the projecting dimension becomes 2 mm when deformed by an external force, the depth of the vertical groove 28 is 2 mm or more, for example, about 2.5 mm. I just hope.

That is, since the horizontal groove 25 and the vertical groove 28 have fundamentally different functions, they need not always be formed at the same depth. However, assuming the labor of molding, especially cutting, it is better to continuously mold at the same depth.
The molding cost of 0 is definitely reduced. For this reason, the locking tongue piece 20 shown in FIG. 1 is drawn so that the horizontal groove 25 and the vertical groove 28 are formed at the same depth.

On the other hand, a key opening 30 for receiving the locking tongue piece 20 is provided on the front side frame F of the locker body. The key opening 30 has an opening area sufficient to receive the locking tongue piece 20. The horizontal width and the vertical dimension need only be equal to or greater than the horizontal width and the vertical dimension of the entry portion of the locking tongue piece 20.

On one side edge 67 of the key opening 30, two upper and lower projecting guide pieces 31, 32 are provided. This protruding guide piece 3
The upper and lower widths of the first and second locking tongue pieces 20 are set slightly smaller than the upper and lower widths of the lateral grooves 25 of the locking tongue piece 20. The dimension may be set to the extent that it slides just barely, but it is preferable to allow a margin of about 0.5 to 2 mm from the vertical width of the lateral groove 25 in consideration of molding errors.

The protruding guide pieces 31 and 32 need not be deformed during normal use, and must be securely crushed (deformed) during a crime. Therefore,
In this embodiment, as shown in FIGS. 2 and 3, the panel 18 forming the front frame F of the rocker main body and the panel 38 forming the protruding guide pieces 31 and 32 are formed by different members, and the protruding guides are formed. The panel 38 forming the pieces 31 and 32 is disposed on the back surface of the panel 18 as a reinforcing panel.

That is, as shown in FIG. 4, for example, the panel 38 has two projecting guide pieces 31,
32, which are fixed to the back surface of the panel 18 as shown in FIGS.
1,32 functions are performed. Panel 1
The reason why the panel 8 and the panel 38 are formed as separate members is to realize the protruding guide pieces 31 and 32 having appropriate dimensions / strength according to the lateral groove 25 of the locking tongue piece 20 for the purpose of reinforcement. In FIG. 3, reference numeral 61 denotes a turn-back portion that forms the front frame F of the locker main body. Since the folded portion 61 has nothing to do with the present invention, it may be omitted in principle.

According to this configuration, when the door 12 is forcibly opened by using a bar or the like, the locking tongue piece 20 squeezes the protruding guide pieces 31 and 32 following the door 12, and the door 12 is further pushed. When trying to open, the deformed protruding guide pieces 31, 32 are caught in the vertical groove 28,
Disable any further forced door opening.

If the door 12 is prying open by a mechanical force other than human power, the projecting guide piece 3
1, 32 may be crushed to a considerable extent. Even in this case, in principle, the deformed protruding guide pieces 31, 3
2 can be caught in the vertical groove 28 to prevent the door from being opened. However, when the protruding guide pieces 31 and 32 are crushed with unexpected strength, the end of the panel 18 (one side edge 6
7) enters the vertical groove 28 without being deformed. Therefore, no matter how strong the external force is applied, the door cannot be further opened.

The lock tongue piece 20 is preferably a rigid metal panel having a predetermined thickness. However, the lock tongue piece 20 is not limited to a flat plate, but may be a round bar or square bar. The effect is the same as long as the horizontal groove 25 and the vertical groove 28 are provided. In addition, as long as such a locking tongue piece 20 is applicable, it can be used not only for various lockers but also for various locks such as an office building and a door for a house. Moreover, you may use it for locks other than a door (door) like a drawer of a desk.

The cross-sectional shape of the groove (25) may vary depending on the cutting tool, and may have an appropriate shape. For example, it has a U-shaped cross section, a U-shaped cross section having a sufficient depth, a tapered shape, or the like. In the above description, the locking tongue piece (20) is provided on the body frame side, and the key opening (30) is provided on the side surface of the door (12). Get.

[0035]

As described above, according to the lock structure of the present invention, it is possible to reliably prevent theft due to forced prying while keeping the equipment cost low.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a lock structure according to the present invention.

FIG. 2 is a diagram illustrating a relationship between a locking tongue and a key opening according to the present invention.

FIG. 3 is a plan view illustrating the relationship between the lock tongue and the key opening according to the present invention.

FIG. 4 is a view exemplifying a relationship between a locking tongue piece and a protruding guide piece according to the present invention.

FIG. 5 is a diagram illustrating a locker to which the lock structure according to the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Locker 12 Door 14 Locking handle 16 Link rod 20 Locking tongue piece 25 Horizontal groove 28 Vertical groove 30 Key opening 31, 32 Projection guide piece 38 Panel (reinforcement panel) 51 Side surface along the forward and backward movement direction 61 Folding part 67 Key opening One side edge

Claims (3)

[Claims] In a lock structure for allowing a locking tongue to enter a key opening of a door, a protruding guide piece is provided on a side edge of the key opening, and guided by a side surface of the locking tongue by the protruding guide piece. A lock structure comprising a horizontal groove having a predetermined length and a vertical groove substantially perpendicular to the horizontal groove. 2. The locking device according to claim 1, wherein the vertical groove extends from the upper end of the side surface of the locking tongue to the lower end of the side surface.
Lock structure as described. 3. A projecting guide piece provided on a side edge of a key opening includes a first projecting piece for guiding an upper end face of a lateral groove and a second projecting piece for guiding a lower end face of a sliding groove. The lock structure according to claim 1, wherein the lock structure comprises: