JP3545602B2 - Locking device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lock device, and more particularly to a lock device useful as an auxiliary lock.
[0002]
[Prior art]
As a lock device useful as an auxiliary lock for a vending machine or the like, a lock device described in JP-A-9-310541 is conventionally known. In this conventional example, a joint portion that rotatably supports a joint lever is fixed to an apparatus housing of a vending machine, and moves forward and backward within a lever fitting portion that receives the other end of the joint lever on the door body side. The locking part holding the lock shaft is fixed. Locking of the door body is performed by first rotating the joint lever to fit the lever fitting portion, and then operating the cylinder lock of the locking portion to cause the lock shaft to enter the lock hole of the joint lever. The unlocking is performed by operating the cylinder lock to retract the lock shaft from the lock hole.
[0003]
[Problems to be solved by the invention]
However, the above-described conventional example has the following disadvantages. That is, in general, in a post-installed lock such as an auxiliary lock, a high mounting accuracy cannot be expected, so that it is impossible to expect that the locking portion is mounted so that the lever fitting portion exactly matches the rotation locus of the joint lever. Since the joint lever is rigid, the locking operation cannot be performed unless the lever fitting portion is arranged in the rotation locus. Among such mounting errors, the errors in the longitudinal direction of the joint lever, ie, the rotational direction, can be relatively easily absorbed by forming the lock holes in the elongated holes, but the vertical direction, that is, the rotational path surface, Error absorption in orthogonal directions is not simple. If an attempt is made to absorb errors by increasing the width of the lever fitting portion, the lock shaft is exposed to the outside from the lever fitting portion, so that the lock shaft is directly cut off.
[0004]
In the above-described conventional example, the error absorption range is substantially enlarged by allowing the joint lever to move vertically, but once the lock shaft is disengaged, the joint lever is once turned in the opening direction. When the door is directly opened without performing the moving operation, the following problem occurs. That is, the joint lever retreats from the lever fitting portion in accordance with the opening operation of the door body, but at this time, the joint lever that is vertically movable along the rotation axis moves downward by its own weight. When the door is closed again in this state, the joint lever abuts in the vicinity of the locking part without engaging with the lever fitting part, and may damage the joint lever or the locking part. It is necessary to perform the door closing operation after turning to the position, and the operation is troublesome. .
[0005]
The present invention has been made to solve the above-mentioned drawbacks, and has as its object to provide a lock device with good operability.
[0006]
[Means for Solving the Problems]
According to the invention, the object is
A locking portion 4 including a lever fitting portion 1 and fixed to one of the device housing 2 and the door body 3;
A joint lever 6 fixed to the other side and rotatable in the horizontal direction around the pivot 5 between the fitting posture to the lever fitting portion 1 and the open posture, and movable vertically along the pivot 5 is provided. And a joint 7 to be pivoted,
A lock device for locking and unlocking a joint portion by engaging and disengaging a lock shaft of a lock portion with a lock hole of a joint lever fitted to the lever fitting portion,
The joint lever 6 and the locking portion 4 include a cam surface 6c formed on the upper surface of the joint lever 6 and a cam formed on the ceiling wall surface of the lever fitting portion 1 when the door 3 is opened in the unlocked state. The joint lever 6 is forcibly rotated from the fitting posture to the lever fitting portion 1 to the opening posture side by causing the surface 4c to interfere with each other, and is closest to the locking portion 4 when the door body 3 is closed again. This is achieved by providing a locking device in which an interference portion 18 is formed to deflect the tip of the locking portion 4 of the joint lever 6 on the locking portion 4 side from the relative movement trajectory of the pivot 5 to the opening posture side.
[0007]
In the locked state, the joint lever 6 is fitted to the lever fitting part 1 of the locking part 4. In this state, when the engagement of the lock shaft 8 with the lock hole 9 is released and the door 3 is opened, the joint lever 6 moves relative to the locking portion 4 in the moving direction of the door 3. When the joint lever 6 relatively moves with respect to the locking portion 4, the joint lever 6 interferes with the locking portion 4 and is forcibly rotated to the open posture side. Due to the interference with the locking portion 4, the tip of the joint lever 6 reaches a position deviated to the opening posture side from the relative movement locus of the pivot 5 with respect to the locking portion 4, and the lever fitting portion 1 of the locking portion 4 and the joint lever 6 If the rotation planes do not match, the joint lever 6 falls down by its own weight.
[0008]
When the door 3 is further opened beyond the interference position, the tip moves along the opening trajectory of the door 3, and when the door 3 is closed again from this state, the tip of the joint lever 6 is substantially the same as the outward path. When the door reaches the position where it is separated from the locking portion 4 along the path, and the door body 3 is further closed, the joint lever 6 located below the lever fitting portion 1 does not fit into the lever fitting portion 1 but its tip contacts the locking portion 4. Touch In the contact state, the distal end of the joint lever 6 is offset toward the open position with respect to the relative movement path of the pivot 5, so that when the door body 3 is further closed, the joint lever 6 is moved from the contact portion with the locking portion 4. Rotating to the open position side by receiving the reaction force in the rotation direction, damage to the locking portion 4 and the joint lever 6 is prevented. The locking of the joint 7 can be easily performed by closing the door body 3, pulling up the joint lever 6 to fit the lever 7 into the lever fitting portion 1, and then allowing the lock shaft 8 to enter the lock hole 9. It can be carried out.
[0009]
Therefore, in the present invention, it is not necessary to confirm the position of the joint lever 6 at the time of the door closing operation in order to prevent the joint lever 6 from touching the locking portion 4 and damaging the locking device, so that the operability is improved.
[0010]
In this case, when the guide surface 10 is formed on the locking portion 4 as in the invention according to claim 2, the component in the rotational direction of the joint lever 6 toward the open position can be further increased, so that The load on the locking device can be further reduced.
[0011]
Further, by forming the inclined surface oblique to the guide surface 10 from the lever bearing surface 1a of the lever fitting portion 1 downward, the joint lever 6 along the inclined surface when detached from the lever bearing surface 1a As a result, the offset amount can be further increased because the camera is lowered downward and further rotated toward the open posture.

[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 7 shows an embodiment used as an auxiliary lock of a vending machine. The vending machine is formed so that the opening of the device housing 2 can be closed by the door body 3, and a lock device according to the present invention is attached to the boundary between the door body 3 and the device housing 2 in addition to the main lock 11. You. The lock device includes a lock portion 4 fixed to the housing 2 side and a joint portion 7 fixed to the side wall of the door body 3. The distance from the rotation center C of the door body 3 to the mounting portion of the lock device is determined by the lock device. The joint 7 moves substantially in parallel with the opening and closing operation of the door body 3 as shown by the arrow A in the figure.
[0013]
As shown in FIGS. 1 to 3, the joint portion 7 is formed by rotatably supporting a joint lever 6 around a pivot 5 formed on the mounting portion 7 a, and has a long end in the direction of the pivot 5 at the opposite end of the joint lever 6. An elongated lock hole 9 is provided. The mounting portion 7a and the joint lever 6 are formed of a hard material such as stainless steel so as not to be easily cut, and the joint lever 6 has an eave portion 6a covering the lever fitting portion 1 of the locking portion 4 described later. As a result, it is formed in a substantially T-shaped cross section. In addition, a reinforcing rib 6b is disposed at a longitudinal center portion of the joint lever 6 that is easily cut at the time of theft. As shown in FIGS. 1 and 3A, the joint 7 is fixed in such a position that the joint lever 6 rotates in the horizontal direction, and the joint lever 6 slides vertically along the pivot 5. can do.
[0014]
As shown in FIG. 3A, the locking portion 4 is formed by housing a cylinder lock 12 in a case 4a, and the case 4a is provided with a lever fitting portion 1 having a width to which the joint lever 6 can be fitted. Can be The cylinder lock 12 is arranged in the case 4 a with the key operation surface facing downward with the locking portion 4 fixed to the door body 3, so that an unauthorized unlocking operation on the cylinder lock 12 is made difficult.
[0015]
The cylinder lock 12 can be rotated by inserting a key plate 13 having a predetermined code from a key operation surface, and is fixed to an end opposite to the key operation surface by rotating the key plate 13. The rotated cylinder cam 14 can be rotated. As shown in FIG. 3 (c), the cylinder cam 14 has a guide groove 14a obliquely running on the side wall, and a guide pin 8a fixed to one end of the lock shaft 8 is fitted into the guide groove 14a. The case 4a is formed with vertically long guide slots 15 for guiding the guide pins 8a in the vertical direction.
[0016]
The lock shaft 8 is movable along a guide hole 16 formed in the case 4a, and penetrates through the lever fitting portion 1 to reach a shaft receiving piece 17 constituting a ceiling portion of the lever fitting portion 1 in a protruding posture. . The shaft receiving piece 17 is provided with a shaft receiving hole 17a into which the lock shaft 8 is fitted, and holds the lock shaft 8 in the protruding posture in a state where both ends are supported. The posture in which the cylinder lock 12 is fitted to the shaft receiving hole 17a corresponds to the lock position of the cylinder lock 12, and when the cylinder lock 12 is rotated from this state to the unlock position, the cylinder cam 14 is rotated to fit the guide groove 14a. The fitted guide pin 8a moves downward, and the lock shaft 8 retreats from the lever fitting portion 1 as shown by a chain line in FIG.
[0017]
Therefore, in this embodiment, after the joint lever 6 is rotated around the pivot 5 with the door body 3 closed and fitted to the lever fitting portion 1 of the locking portion 4, the cylinder lock 12 is moved to the lock position side. , The lock shaft 8 penetrates through the lock hole 9 of the joint lever 6 and is fitted into the shaft receiving hole 17a by the cylinder cam 14, so that the lock portion 4 and the joint portion 7 are inseparably connected (locked state). ). The error in the fixed position of the locking part 4 and the joint part 7 is caused by the fact that the joint lever 6 slides in the longitudinal direction of the pivot 5 in the vertical direction by the lock hole 9 in which the rotational direction of the joint lever 6 is elongated and in the vertical direction. Absorbed. Further, in the locked state, the lock shaft 8 is supported by the guide hole 16 and the shaft receiving hole 17a, so that a sufficiently high resistance to the load in the forcible pull-out direction of the joint lever 6 can be obtained.
[0018]
When the cylinder lock 12 is rotated again in the unlock direction from the locked state, the lock shaft 8 is retracted from the lever fitting portion 1 and the fitting of the joint lever 6 with the lock hole 9 is released as described above. If the main lock 11 is released, the door 3 can be freely opened and closed (unlocked state).
[0019]
In order to open the door body 3 in the unlocked state, the joint lever 6 is temporarily rotated from the fitting posture shown in FIG. 1B to the opening posture shown in FIG. It is also possible to open the door 3 immediately from the state of b). In order to prevent the above-mentioned problem when such an operation is performed, an interference portion 18 is provided between the joint lever 6 and the case 4a of the locking portion 4. Provided. When the joint lever 6 moves in the opening direction of the door body 3, the interference portion 18 interferes with each other to forcibly rotate the joint lever 6 toward the open position, and as shown in FIG. It is constituted by cam surfaces 6c, 4c formed on both sides of the case 4a of the locking portion 4.
[0020]
The cam surface 4c on the locking portion 4 side projects from the ceiling wall surface of the lever fitting portion 1, that is, the shaft receiving piece 17 toward the inside of the lever fitting portion 1, and gradually becomes wider as approaching the joint portion 7. Formed by On the other hand, the upper surface of the joint lever 6 has a concave portion 6d for absorbing the protrusion 4b for forming the cam surface 4c on the locking portion 4 side, and the rising wall on the distal end side of the concave portion 6d serves as a cam surface 6c. Used.
[0021]
Further, a guide surface 10 is formed on the case 4 a of the locking portion 4. The guide surface 10 is an inclined surface formed by chamfering a corner portion on the joint portion 7 side of the lever bearing surface 1a constituting the bottom wall of the lever fitting portion 1, and the lowest portion is the lowest drop position of the joint lever 6. Set to a lower position.
[0022]
Therefore, in this embodiment, when the door 3 is opened without operating the joint lever 6 from the locked state, as shown in FIG. 5A, the locking portion 4 and the cam surfaces 4c, 6c of the joint lever 6 are connected to each other. When the door 3 comes into contact with the door 3 and the door 3 is opened, the joint lever 6 obtains a rotational force from the cam surface 6c and rotates toward the open position. In the state where the interference at the interference part 18 shown in FIG. 5B is eliminated, the tip of the joint lever 6 is offset by δ with respect to the relative movement path A of the pivot 5 with respect to the locking part 4, and the door 3 is further moved. When released, as shown in FIG. 5C, the tip further rotates while moving downward along the guide surface 10 by its own weight, and the offset amount δ ′ also increases. Thereafter, when the door 3 is further opened and then closed again, the joint lever 6 approaches the guide surface 10 as shown in FIG. 6 while substantially maintaining the illustrated state. In this state, the joint lever 6 is at a position lower than the lever fitting portion 1 of the locking portion 4 as shown by a chain line in FIG. 6B, and when the door 3 is further closed, first, the distal end of the joint lever 6 It contacts the guide surface 10. The distal end of the joint lever 6 in contact with the guide surface 10 has an offset amount of δ ′ with respect to the relative movement path B of the pivot 5, and the guide surface 10 has an amount corresponding to the rotational direction of the reaction force in the contact portion. The joint lever 6 rotates to the open position side due to the inclined surface where the force is increased, so that the locking portion 4 and the joint lever 6 themselves are not damaged.
[0023]
In the above description, the case where the joint portion 7 is fixed to the door body 3 side and the locking portion 4 is fixed to the device housing 2 side has been described. However, the mounting relationship can be reversed. In this case, the locking unit 4 moves with the door opening operation, but the relative movement relationship between the joint lever 6 and the locking unit 4 is completely the same, so that the above-described operation is also the same.
[0024]
【The invention's effect】
As is clear from the above description, according to the present invention, the door can be opened and closed without confirming the position of the joint lever, so that the operability is improved.
[Brief description of the drawings]
FIGS. 1A and 1B are perspective views showing the present invention, wherein FIG. 1A is a diagram showing a state in which a joint lever is held in an open position, and FIG. 1B is a diagram showing a state in which the joint lever is held in a fitted position.
FIGS. 2A and 2B are views showing a locked state, wherein FIG. 2A is a front view, and FIG.
3 (a) is a sectional view taken along line 3A-3A of FIG. 2 (a), FIG. 3 (b) is a sectional view taken along line 3B-3B of FIG. 2 (a), and FIG. It is the figure which looked at the cam from the 3C direction of Drawing 3 (b).
FIGS. 4A and 4B are cross-sectional views of FIG. 2, wherein FIG. 4A is a cross-sectional view taken along line 4A-4A of FIG. 2A and FIG. 4B is a cross-sectional view taken along line 4B-4B of FIG.
5A and 5B are diagrams showing the operation of the interference unit, wherein FIG. 5A is a diagram showing the initial stage of door opening, FIG. 5B is a diagram showing when interference is eliminated by the interference unit, and FIG. It is a figure showing the state where it turned.
6A and 6B are diagrams showing an operation at the time of closing the door, wherein FIG. 6A is a plan view, and FIG.
FIG. 7 is a perspective view showing a state of attachment to a vending machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lever fitting part 2 Device housing 3 Door 4 Locking part 5 Axis 6 Joint lever 7 Joint part 8 Lock shaft 9 Lock hole 10 Guide surface

Claims (2)

A locking portion including a lever fitting portion and fixed to one of the device housing and the door body,
A joint lever fixed to the other side and rotatable in a horizontal direction around a pivot between a fitting posture to a lever fitting portion and an open posture is pivotally supported, and is vertically movable along the pivot. And a joint part,
A lock device for locking and unlocking a joint portion by engaging and disengaging a lock shaft of a locking portion with a lock hole of a joint lever fitted to a lever fitting portion,
When the door is opened in the unlocked state, the cam surface formed on the upper surface of the joint lever and the cam surface formed on the ceiling wall surface of the lever fitting portion mutually interfere with the joint lever and the locking portion. Then, the joint lever is forcibly rotated from the fitting posture to the lever fitting portion to the opening posture side, and when the door body is closed again, the locking portion side tip of the joint lever closest to the locking portion is pivoted to the pivot shaft . A lock device provided with an interference unit that deviates from the relative movement trajectory toward the open posture. A guide surface for forcibly rotating the joint lever disengaged from the lever support surface of the lever fitting portion toward the open posture side by its own weight is formed in the locking portion obliquely downward from the lever support surface. Item 7. The lock device according to Item 1.

Images