JPH05214870A - Drop lock - Google Patents

Abstract

PURPOSE:To facilitate locking operation by a method wherein a lock board adapted for engagement with engaging teeth fixed to a mount base is provided on a drop rod and a sliding board, which is operated by an operation button to bring the lock board into engagement with the teeth, is provided in a movable case. CONSTITUTION:When a movable case 12 is depressed under unlocked condition, a drop rod 4 falls down into an engaging hole to form a locked state, so that, even if an attempt is made to lift the rod 4, an engaging piece 10 of a lock board 5 is engaged with engaging teeth 11 fixed to a mount base 1. For unlocking, a rotation element 31 is rotated to disengage a stopper 37 from an operation button 19. When the button 19 is depressed to rotate an axis 17 inwardly, a sliding board 22 descends so that the lower end thereof pushes down the rear end of the board 5 to prevent the piece 10 from contacting the teeth 11. Further, when the case 12 is lifted, the rod 4 also is lifted to form an unlocked state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to drop locks generally called French drop locks.

[0002]

2. Description of the Related Art The French dropper disclosed in Japanese Utility Model Publication No. 55-22137 is mounted on a mounting plate so that a drop rod, that is, a locking rod is fixed to a mounting plate so that the slider can be moved up and down, and is rotatably mounted on the mounting plate. 180 lever lever up and down
The lock rod is moved up and down by rotating.

The drop lock disclosed in Japanese Utility Model Publication No. 56-45984 has a drop rod, that is, a lock rod, in which a rod and a pipe are connected by a lateral groove and a pin so as to be rotatable and move up and down together. The guide pin fixed to the pipe is fitted into the vertically elongated hole of the lock frame, and the guide pin is engaged with the upper and lower lateral holes provided in the vertically elongated hole by the biasing force of the spring.The spring also has a downward biasing force. is doing.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The French drop shown in Japanese Patent No. 2137 is one in which the lever handle is rotated up and down by 180 °, and when the lever handle is in the upper or lower position, the surface of the lever and the surface of the mounting plate are flush with each other so that there is no protrusion. ing.

For this reason, the mounting plate is provided with a groove into which the lever is inserted, and the upper and lower parts of the groove into which the lever of the mounting plate is inserted are deeply recessed so that a finger is put on the tip of the lever.
Even in this case, there is a problem that it is difficult for a finger to be applied to the lever, and there is also a problem that the rotation of the lever is heavy because the rotational motion of the lever is converted into the vertical motion of the locking rod.

Further, in the drop lock disclosed in Japanese Utility Model Publication No. 56-45984, the lock rod is lowered by a spring, but when the pin provided on the lock rod is inserted from the horizontal hole of the lock frame into the vertically elongated hole, it resists the urging force of the spring. It is heavy because you have to rotate the lock rod,
Since the lock rod must be lifted against the biasing force of the spring, it is heavy.

The object of the present invention is to solve the above-mentioned problems and to easily move the drop bar up and down by a simple operation, and when the drop bar is lowered, the drop bar is automatically locked, which is a convenient drop mechanism. It is to provide a lock.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a lock plate is swingable by a horizontal shaft in the middle of a drop bar fixed to a movable case mounted vertically on a mounting base. And a guide plate having locking teeth for locking the engaging piece of the lock plate to prevent the drop bar from rising is fixed to the mounting base, and the lock plate is attached to the lock plate. A spring is provided to bias the joint piece in the direction of engaging the locking tooth, and further, when the movable case is lowered, the rear end of the lock plate is pushed down so that the engaging piece of the lock plate is guided by the guide piece. A sliding plate that is in a position that does not engage with the locking teeth of the plate is mounted so as to be able to move up and down, and an operation button held by a spring is provided in a part of the movable case. When the operation buttons are pressed against the spring, the sliding plate It is obtained by a structure linked to later.

[0009]

In the unlocked position in which the drop bar is raised together with the movable case, when the movable case is pushed down, the drop bar is also lowered together therewith. At this time, the lock plate comes into contact with the locking teeth provided on the mounting base by the action of the spring, but when the lock plate descends, it acts so as to escape from the locking teeth, so that the drop bar easily descends. .. When the drop bar is lowered to a predetermined position, the lock plate is engaged with the locking teeth by the spring and the rise is blocked.

To release the locked state, a push button on a part of the case may be pushed in, whereby the sliding plate descends and the lower end of the sliding plate depresses the rear end of the locking plate to cause the leading end of the locking plate. Since the engaging piece of (1) is set to a position where it does not engage with the locking tooth, the drop bar is also raised by raising the case to the unlocked position.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in the drawings, 1 is a mounting base which is fixed to a door (not shown) by screws or the like. The guide plate 2 is fixed to the mounting base 1, and the guide bushes 3 are fixed to the guide holes provided in the upper and lower pieces thereof. Reference numeral 4 denotes a drop rod slidably mounted on the upper and lower guide bushes 3, and a lock plate 5 is swingably attached by a horizontal shaft 6 to an intermediate portion thereof.

Between the drop bar 4 and the lock plate 5, a spring 7 is provided at the end of the lock plate 5 on the guide plate 2 side to urge a downward rotating force. Further, as shown in FIG. 8, the lock plate 5 has a notch 9 into which the drop bar 4 is inserted, and pieces on both sides of the notch 9 are used as engaging pieces 10.

On both sides of the intermediate portion of the guide plate 2, there are provided rack gear-shaped locking teeth 11 composed of a plurality of chevron projections for locking the engaging pieces 10 of the lock plate 5. Reference numeral 12 denotes a movable case, which is integrally connected to the drop bar 4 by upper and lower bolts 13.

The case 12 has a U-shaped cross section, and both sides thereof slidably cover both sides of the base 1 and the guide plate 2 as shown in FIG. 8 and extend above the base 1, the guide plate 2 and the drop bar 4. ing.

A back plate 14 is fixed to the inside of the upper portion of the case 12, that is, on the side of the base 1 with bolts 15. A pair of left and right support pieces 1 provided in a forward direction are provided near the lower part of the back plate 14.
A lower end of an operation button 19 is swingably attached to the shaft 6 by a shaft 17.

The operation button 19 is the movable case 12
A window 21 facing the upper part of the window is provided, and a spring 21 for urging the window 20 to close the window 20 is provided between the button 19 and the back plate 14.

Reference numeral 22 denotes a sliding plate mounted in the case 12 so as to be able to move up and down, and its lower end is in contact with the rear end of the lock plate 5. A connecting piece 23 provided upward on both sides of an inward piece 24 at the upper end of the sliding plate 22 is rotatably connected to the outside of the left and right connecting portions 26 inside the lower end of the operation button 19 by a shaft 25. There is.

A circular opening 30 is further provided above the window 20 provided in the movable case 12, and a small diameter portion of the outer end of the rotator 31 is rotatably fitted into the opening 30 as shown in FIG. The end of the protruding shaft 32 at the inner end of the armature 31 is rotatably fitted in the round hole 33 of the back plate 14.

As shown in FIG. 5, the rear portion of the projecting shaft 32 has an angular shaft 3
4, the linear spring 35 for preventing natural rotation of the rotator 31 is attached to the inside of the back plate 14 every time the rotator 31 is rotated by 90 ° by being crimped onto the upper and lower flat portions of the square shaft 34. And the both ends thereof are locked to the locking pieces 36 on both sides of the back plate 14, and stoppers 37 for blocking the rotation of the operation button 19 are provided on a part of the outer periphery of the rotator 31.

Next, the operation of the above embodiment will be described. FIG. 1 shows an unlocked state in which the drop bar 4 is raised. At this time, the drop bar 4 is in the raised position together with the movable case 12, and at this time, the engagement piece 10 of the lock plate 5 is above the locking teeth 11.

The operation button 19 closes the window 20 and its surface is flush with the surface of the movable case 12. Then, the stopper 37 of the rotator 31 has the operation button 1
Since the inside of the upper end of 9 is locked, it does not move even if the operation button 19 is pressed.

When the movable case 12 is pushed down in this state, the drop bar 4 integral with this is also lowered. At this time, the engaging piece 10 of the lock plate 5 comes into contact with the locking tooth 11 but escapes against the spring 7 without engaging, so that the drop bar 4 descends to the locking position shown in FIG. The lower end of 4 fits into a locking hole such as a floor surface (not shown).

At this time, even if an attempt is made to raise the drop bar 4 from below by some method, the engaging piece 10 of the lock plate 5 is locked by the locking teeth 11, so that it cannot be unlocked illegally. Absent.

In order to unlock from the above-mentioned locked state, first the rotary member 31 is rotated 90 ° in the direction of the arrow in FIG. Is removed from the operation button 19.

Next, as shown in FIG. 3, when the operation button 19 is pushed to rotate inwardly about the shaft 17, the sliding plate 22 connected thereto descends, and the lower end of the sliding plate 22 is placed behind the locking plate 5. Since the end is pushed down, the engaging piece 10 on the upper end of the end of the engaging tooth 11
It will not come into contact with.

When the movable case 12 is pulled up in this state, it rises together with the drop bar 4 to the unlocked position. after that,
The pressing of the operation button 19 is released, the rotator 31 is rotated in the original direction, the button 19 is fixed by the stopper 37, and the state shown in FIG. 1 is restored.

[0027]

As described above, according to the present invention, since the engaging piece of the lock plate is locked by the locking tooth and the drop bar does not move up only by pushing down the movable case at the unlocked position as described above, the locking operation is easy.

Further, when unlocking, it suffices to push the operation button and pull up the movable case, so that the unlocking operation is easy.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment when unlocking.

FIG. 2 is a vertical sectional side view of the same when locking.

FIG. 3 is a vertical cross-sectional side view during the unlocking operation of the above.

FIG. 4 is an enlarged vertical side view of the upper half of the embodiment.

FIG. 5 is an enlarged front view of the above.

[FIG. 6] Similarly, an enlarged vertical side view of the lower portion.

7 is a cross-sectional view taken along the line AA of FIG.

FIG. 8 is a sectional view taken along line BB of FIG.

FIG. 9 is an enlarged perspective view around the operation button.

[Explanation of symbols]

 1 Mounting Base 2 Guide Plate 4 Drop Bar 5 Lock Plate 6 Horizontal Axis 7 Spring 10 Engaging Piece 11 Locking Teeth 12 Movable Case

Claims (1)

[Claims] 1. A lock plate is swingably mounted by a horizontal shaft in the middle of a drop bar fixed to a movable case that is vertically movable with respect to a mounting base, and the lock plate is engaged with the mounting base. A guide plate having locking teeth that lock the piece to prevent the drop bar from rising is fixed, and the locking plate is urged in the direction to engage the engaging piece of the locking plate with the locking tooth. And a sliding plate that pushes the rear end of the lock plate when it descends in the movable case so that the engagement piece of the lock plate does not engage with the locking teeth of the guide plate. When the operation button held by a spring is provided in a part of the movable case and the operation button and the sliding plate are pressed against the spring against the spring. A drop lock connected so that the sliding plate descends.