JP2883609B1 - Latch device with dead bolt - Google Patents

Abstract

Abstract: A latch with a dead bolt that can be unlocked simultaneously with a single operation of a latch and a dead bolt and a key cannot be removed unless the door is closed and locked, so that the door cannot be locked without forgetting to lock. Provide equipment. SOLUTION: A lock unit 1 in which a key 4 is inserted into and removed from a key hole 3 of a rotor 2 at a single position is fixed to a front plate 5a of a fixing case 5, and a passive wall 8a of a latch 8 and a dead bolt are fixed. 9, the first passive wall 9a of the dead bolt 9 is retracted to the unlocking position, while the second passive wall 9b of the deadbolt 9 is pushed and advanced to the locking position. Then, the second passive wall portion 9b is formed so that the dead bolt 9 comes to the most advanced position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch device with a deadbolt used for locking a door to a fixed frame such as a box body in a control device storage box of a traffic signal.

[0002]

2. Description of the Related Art In a latch device combined with a deadbolt which has been widely used, a door is closed temporarily and a latch is engaged with a metal receiving portion to temporarily lock the door with respect to a fixed frame body. The key is inserted into the lock rotor linked to the dead bolt, and the dead bolt is engaged with another receiving part. As described above, the latch and dead bolt are basically different types of locking mechanisms.To unlock and open the door, retract the dead bolt to the unlock position with a key, then turn the knob to latch. Needs to be retracted to the unlock position, and the operation is performed in two steps, so that the operability is not good. In addition, when the door is closed, the latch automatically moves back and forth and engages with the receiving portion. Therefore, although the latch is merely a temporary lock, it leaves the site with a false belief that the full-scale locking by the deadbolt has been performed. In some cases, the temporary locking of the latch is accidentally released by the vibration of the traveling vehicle, and the door may be opened unintentionally. In addition, since the key can be removed while the door is open, the key has been accidentally lost.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a good operability by simultaneously unlocking a latch and a dead bolt by a single operation, and to remove a key only after closing and locking a door. Therefore, it is an object of the present invention to provide a latch device with a deadbolt, which can prevent the door from being forgotten to be locked and reduce the loss of the key.

[0004]

Means for Solving the Problems Hereinafter, a description will be given using reference numerals in the accompanying drawings. In the latch device with a dead bolt of the present invention, the position where the key 4 is inserted and removed from the key hole 3 of the rotor 2 is limited to one place. The lock unit 1 is fixed to the front plate portion 5a of the fixed case 5, and the latch 8 and the dead bolt 9 which come and go from the through hole 6 of the side plate portion 5b of the fixed case 5 to engage and disengage with the metal receiving portion 7 are fixed. The latch 8 is slid and urged in the forward direction by a spring 10 to push the passive wall portion 8a of the latch 8 and the first passive wall portion 9a of the dead bolt 9 so that the latch 8 and the dead bolt 9 are moved. The rear end of the rotor 2 slides the cam plate 11 that slides backward to the unlocking position released from the metal receiving portion 7 and pushes the second passive wall portion 9 b of the dead bolt 9 to slide the dead bolt 9 forward to the locking position. To the rotor 2 The second passive wall portion 9b of the deadbolt 9 is formed such that when the is rotated to the key removal position, the deadbolt 9 comes to the most advanced position.

In this latch device, when the door 12 is closed and the fixed frame 13 is fully locked as shown in FIGS. 1 to 4, the latch 8 is engaged with the metal receiving portion 7. In addition, the dead bolt 9 is also engaged with the receiving part 7. In FIG. 3, the rotor 2 is in the only key removal position. The dead bolt 9 is deeply inserted into the metal receiving portion 7 with the tip end aligned with the latch 8, and the cam plate 11 is in contact with the second passive wall portion 9 b of the dead bolt 9. At this position, when a predetermined key 4 is inserted into the keyhole 3 and turned clockwise, for example, by 70 degrees, the right side surface of the cam plate 11 becomes the first passive wall portion 9a of the dead bolt 9 and the passive wall portion 8a of the latch 8. At the same time, the dead bolt 9 and the latch 8 simultaneously slide backward to the unlocking position, and as shown in FIG.
The whole is immersed in. This unlocks the door 12,
It can be opened.

After the door 12 is opened, when the finger is released from the key 4,
As shown in FIG. 8, the latch 8 protrudes from the through hole 6 of the fixed case 5 by the return bias of the spring 10, and comes to a position where it can come into contact with the metal receiving portion 7. First passive wall 9a of deadbolt 9
Since a space wider than the lateral width of the cam plate 11 is set between the second passive wall portion 9b and the second passive wall portion 9b, the left side surface portion of the cam plate 11 is only in contact with the second passive wall portion 9b. The cam plate 11 does not push the dead bolt 9. for that reason,
Even if the latch 8 is at the most protruding position as described above,
The dead bolt 9 is located at a position slightly protruding from the fixed case 5. Therefore, when the latch 8 once slides backward by the contact between the cam slope 8b at the front end and the front edge of the metal receiving part 7 in the closing end area of the door 12, and then engages with the metal receiving part 7, The dead bolt 9 can pass through the side of the receiving part 7 without any trouble.

At this stage, when the key 4 is rotated counterclockwise by, for example, 25 degrees, the left side surface of the cam plate 11 pushes the second passive wall portion 9b, so that the dead bolt 9 is slid forward. Move to the locked position shown in. At this stage, the key 4 is pulled out from the keyhole 3 of the rotor 2, so that the door 1
The worker is able to leave the site with the lock 2 securely locked. If the key 4 is removed by rotating the rotor 2 to the key removal position before closing the door 12 by mistake, the deadbolt 9 comes to the most advanced position as shown in FIGS. 9 and 10. When the door 12 is rotated in the closing direction as it is, the dead bolt 9
The front end of the colliding with the receiving portion 7 prevents the door 12 from being closed. The worker who noticed this misoperation is key 4
To return the rotor 2 to the unlocked position,
Will be restarted.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated embodiment, a lateral slot 14 is provided on the rear surface of a latch 8 so that a fixed case 5 is provided.
A guide pin 15 fixed to the rear plate 5c is inserted into the slot 14. Thus, the forward and backward strokes of the latch 8 are set. Latch 8 of fixed case 5
It is guided so as to move linearly by four assembly pins 16. The biasing spring 10 is formed of a compression coil spring. One end of the spring 10 is inserted into the concave portion 8c at the right end of the latch 8, and the other end of the spring 10 is in contact with the right side plate 5d of the fixed case 5. The deadbolt 9 is provided with a stop projection 9c abutting on the assembly pin 16 adjacent to the second passive wall portion 9b. As the lock mechanism incorporated in the lock unit 1, a known disk tumbler lock mechanism, a pin tumbler lock mechanism, or the like can be appropriately selected and used, and is not particularly limited. The tip of the rotor 2 of the lock unit 1 protrudes into the inside of the fixed case 5, and the cam plate 11 has two screws 17.
To the rotor tip.

[0009]

As described above, in the latch device with a dead bolt according to the present invention, the lock unit 1 includes the keyhole 3 of the rotor 2.
The position of the key 4 for inserting and removing the key 4 is limited to one position, and the passive wall 8a of the latch 8 and the dead bolt 9
Push the first passive wall portion 9a of the latch 8 and the dead bolt 9
Is moved backward to the unlocking position where it has been released from the metal receiving portion 7, and the cam plate 11 which pushes the second passive wall portion 9 b of the dead bolt 9 to slide the dead bolt 9 forward to the locking position is moved behind the rotor 2. The second passive wall portion 9b of the deadbolt 9 is formed such that the deadbolt 9 is located at the most advanced position when the rotor 2 is rotated to the key removal position. The rotation operation allows the latch 8 and the dead bolt 9 to be simultaneously driven to the unlocking position, thereby improving operability. Unless the door 12 is completely closed and the latch 8 and the dead bolt 9 are engaged with the metal receiving part 7 to a predetermined depth to lock the door 12 with respect to the fixed frame 13, the key 12 Cannot be removed from the keyhole 3 of the rotor 2, so that the key 4 is not lost or lost while the door 12 is opened, and the door 12 is not forgotten to be locked.

[Brief description of the drawings]

FIG. 1 is a front view of a latch device with a dead bolt according to an embodiment of the present invention in a door locked state.

FIG. 2 is a bottom view of the latch device in a door locked state.

FIG. 3 is a view showing the positional relationship between the latch and the dead bolt and the receiving part in the locked state of the door of the latch device,
It is sectional drawing along the A line.

FIG. 4 is a view showing the positional relationship between the latch and the dead bolt and the receiving part in FIG.
It is sectional drawing which followed the B line.

FIG. 5 is a cross-sectional view similar to FIG. 3 in a state where the door of the latch device is unlocked.

FIG. 6 is a cross-sectional view similar to FIG. 4 in a state where the door of the latch device is unlocked.

FIG. 7 is a sectional view similar to FIG. 3 in a state immediately before the door of the latch device is closed.

FIG. 8 is a sectional view similar to FIG. 4 in a state immediately before the door of the latch device is closed.

FIG. 9 is a sectional view similar to FIG. 3 when the key is removed before the door of the latch device is closed.

FIG. 10 is a cross-sectional view similar to FIG. 4 when the key is removed before the door of the latch device is closed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock unit 2 Rotor 3 Keyhole 4 Key 5 Fixing case 6 Through hole 7 Reception part 8 Latch 9 Deadbolt 10 Latch return spring 11 Cam plate 12 Door 13 Fixed frame body 14 Slot hole 15 Guide pin 16 Assembly pin 17 Cam Screw for fixing plate

Claims (1)

(57) [Claims] 1. A lock unit 1 in which a key 4 is inserted into and removed from a key hole 3 of a rotor 2 at one position is fixed to a front plate 5a of a fixed case 5, and a side plate 5b of the fixed case 5 A latch 8 and a deadbolt 9 which come and go from the through-hole 6 and engage and disengage with the metal receiving portion 7 are arranged side by side and accommodated in the fixed case 5,
The latch 8 is slid in the forward direction by a spring 10 to push the passive wall 8a of the latch 8 and the first passive wall 9a of the dead bolt 9 to release the latch 8 and the dead bolt 9 from the metal receiving part 7. While sliding backward to the locking position, the cam plate 11 for pushing the second passive wall portion 9b of the deadbolt 9 to slide the deadbolt 9 forward to the locking position is fixed to the rear end of the rotor 2, and the rotor 2 is rotated. When rotated to the key removal position,
A latch device with a dead bolt in which a second passive wall portion 9b of the dead bolt 9 is formed such that the dead bolt 9 is at the most advanced position.