JP3524518B2 - Key handle removable locking device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key handle pull-out type locking device used for a door of a device storage box such as a switchboard or a control panel.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Publication No. 55-29643, a conventional key handle insertion / removal type locking device has a fixed main body in which a large-diameter shaft hole and a small-diameter shaft hole are formed in front and rear along an axial direction. An inner flange is formed on the inner surface of the front end of the large-diameter shaft hole so that the locking shaft is rotatably fitted in the small-diameter shaft hole of the fixed body, and a pin receiving hole is provided in the fixed body around the small-diameter shaft hole. Direction, and insert the lock pin, which is biased forward by the compression coil spring, into the pin receiving hole, and insert the lock pin on the outer peripheral surface of the enlarged head of the locking shaft arranged in the large diameter shaft hole of the fixed body. A lock groove is formed with which a part of the cross section is engaged. Then, a groove for insertion / removal positioning is formed in the inner flange portion of the fixed main body, and a cylindrical portion that is inserted / removed in the large-diameter shaft hole of the fixed main body and is fitted into the head portion of the locking shaft so as not to be relatively rotatable in a specific positional relationship. A pulling protrusion that is provided at the tip of the key handle is formed on the outer surface of the tubular portion to pass through the insertion / removal positioning groove of the fixed body, and the front surface of the lock pin is pushed by the tip surface of the tubular portion to secure the lock pin. The lock restraint of the lock shaft relative to the fixed body is released by retracting the lock shaft to the fixed body by rotating the lock shaft to the unlocked position by the key handle, and the pulling protrusion of the key handle is moved to the inside of the fixed body. It is brought into contact with the back of the collar and pulled by the key handle.

In the normal operation of the key handle insertion / removal type lock device constructed as described above, when the pulling projection of the key handle is rotated to a position aligned behind the insertion / removal positioning groove of the fixed body, it is integrated with the key handle. The lock groove of the head of the locking shaft rotated to align with the pin receiving hole of the fixed body, and at that moment, the lock enters into the lock groove by the bias of the compression coil spring, and the lock shaft is fixed to the fixed body. It is supposed to restrain rotation.

However, the inner peripheral surface of the small diameter shaft hole of the fixed main body is provided with a slight draft at the design stage in order to improve the mold release property at the time of die casting, and the rotation of the locking shaft. In order to smoothly perform the above, a clearance is set between the inner peripheral surface of the small diameter shaft hole and the outer peripheral surface of the locking shaft at the design stage, and due to an error during molding of the fixed body and the locking shaft, Due to the fact that the clearance tends to expand beyond the design value, there is inevitably some play between the fixed body and the locking shaft.

The presence of such play is a major cause of malfunction of the lock device as described below. That is, although the lock groove of the locking shaft is not yet aligned with the pin receiving hole of the fixed body, the pulling projection of the key handle apparently causes the pulling projection of the key handle to be behind the insertion / removal positioning groove of the fixed body. It is that you will come to the position aligned with. The operator who visually confirms that the lock handle has been brought to this position erroneously recognizes that the lock is established, and pulls out the key handle from the fixed body.

However, at this stage, since the lock groove of the lock shaft and the pin receiving hole of the fixed body are not aligned, the lock pin cannot enter the lock groove, and the lock shaft is fixed to the fixed body. On the other hand, it is in an unlocked state that is not rotationally restrained. If the worker walks away, the locking shaft may accidentally rotate in the unlocking direction due to the back tension due to the biased load of the lock plate and locking rod connected to the rear end of the locking shaft. Yes,
This leads to a dangerous situation where the door of the equipment storage box is not locked to the box body. Since the tubular portion of the key handle is shaped so that it can be fitted into the locking shaft head only when the locking shaft comes to the regular locking position and the tubular portion has a specific positional relationship with the locking shaft. (A fitting positioning protrusion formed on the head of the locking shaft and a fitting positioning groove formed on the inner surface of the cylinder), the key handle is fixed when the locking shaft turns in the unlocking direction due to the back tension. It becomes impossible to insert it in the main body, and the locking device becomes unusable.

When the locking shaft is completely rotated to the proper unlocked position due to the back tension, the lock device itself cannot be used, but the door of the equipment storage box can be opened. However, when the rotation of the locking shaft in the locking direction is stopped midway, the door is still in the locked state or the semi-locked state, so the door cannot be opened, and the hinge portion of the door cannot be disassembled. The only option is to remove the door from the box body by destroying it.

[0008]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a fixing main body for a key handle by a correction operation that can be easily executed even if the locking shaft is displaced from the regular locking position due to back tension acting on the locking shaft. It is an object of the present invention to provide a key handle removable lock device that can be inserted into a key handle.

[0009]

Means for Solving the Problems A key handle pull-out type locking device to which the invention of claim 1 is directed will be described below with reference to the reference numerals in the accompanying drawings. Form a small diameter shaft hole 3 back and forth along the axial direction,
An inner flange 4 is formed on the inner surface of the front end of the large-diameter shaft hole 2, a locking shaft 5 is rotatably fitted in the small-diameter shaft hole 3 of the fixed body 1, and the fixed main body 1 receives a pin around the small-diameter shaft hole 3. A hole 6 is formed in the axial direction, and a lock pin 8 urged forward by a compression coil spring 7 is inserted into the pin receiving hole 6, and an enlarged head of the locking shaft 5 arranged in the large-diameter shaft hole 2 of the fixed body 1. Lock pin 8 on the outer peripheral surface of part 9
Forming a lock groove 10 with which a part of the cross section of the lock groove engages.

Then, an insertion / removal positioning groove 11 is formed in the inner flange portion 4 of the fixed main body 1 and is inserted / removed in / from the large diameter shaft hole 2 of the fixed main body 1 so that the head 9 of the locking shaft 5 cannot be relatively rotated in a specific positional relationship. A tubular portion 12 to be fitted to the key handle 13 is provided at the tip of the key handle 13, and a pulling projection 14 that passes through the insertion / removal positioning groove 11 of the fixed body is formed on the outer surface of the tubular portion 12.
The front surface of the lock pin 8 is pushed by the tip surface 15 of the lock pin 8 and the lock pin 8 is retracted into the pin receiving hole 6 of the fixed body 1 to release the rotation restraint of the lock shaft 5 with respect to the fixed body 1, and the key handle 13 is used to lock the lock shaft. 5 is rotated to the unlocked position so that the pulling projection 14 of the key handle 13 is brought into contact with the back surface of the inner flange portion 4 of the fixed main body 1 and pulled by the key handle 13.

According to a first aspect of the present invention , in the lock device configured as described above, the lock device is inserted into the large-diameter shaft hole 2 of the fixed body 1 without being hindered by the inner flange portion 4 of the fixed body 1.
Cylindrical portion 33 fitted to the head 6 of the locking shaft 5 so as not to rotate relative to it
Is provided at the tip of the correction operation tool 32, and the lock operation shaft 5 is returned to the normal locking position and rotated by the correction operation tool 32. Further, the lock device according to the invention of claim 2
Is a correction operation tool 3 in addition to the configuration of the invention of claim 1.
So that the second shaft extends at a right angle to the shaft of the key handle 13.
In addition, it is provided integrally with the key handle 13. Furthermore
According to the lock device of the invention of claim 3,
In addition to the above-mentioned configuration of the invention of claim 2 or claim 2, the locking shaft 5
Protrusion 24 for fitting and positioning on the outer peripheral surface of the enlarged head 9
And engage with the fitting positioning protrusion 24.
The fitting positioning groove 34 is formed in the fitting portion of the correction operation tool 32.
33 is formed.

[0012]

The fixed main body 1 is fitted into the mounting hole 17 of the door panel 16 of the equipment storage box from the front side so as not to be relatively rotatable, and is fixed to the door panel 16 by the nut 19 fitted in the outer peripheral thread portion 18. At the rear end of the locking shaft 5 protruding to the back side of the fixed body 1, a stopper plate 22 that engages with a receiving portion 21 on the box body 20 side is provided according to the usage pattern.
The lock interlocking plate is fitted so as not to rotate relative to it, and is fixed by tightening with the bolt 23. A base end of the lock rod is connected to the lock interlocking plate, and a dead bolt or a spring-biased latch bolt that engages with the receiving hole on the box body 20 side is connected to the front end of the lock rod. Will be done.

As shown in FIG. 4, when the stopper plate 22 is engaged with the receiving portion 21 on the side of the box body 20 and the door panel 16 is locked to the box body 20 so as not to be opened, The lock groove 10 of the locking shaft 5 is aligned with the pin receiving hole 6 of the fixed body 1, and the front end of the lock pin 8 urged by the compression coil spring 7 enters the lock groove 10 by a predetermined depth. The front end face of the lock pin 8 is pressed against the bottom face on the front end side of the lock groove 10 of the locking shaft 5. As a result, the locking shaft 5 is non-rotatably restrained with respect to the fixed body 1.

The lock plate 5 is released by releasing the rotation restraint of the locking shaft 5.
To turn 2 to the unlocked position, as shown in FIG. 5, align the pulling projection 14 of the tubular portion 12 of the key handle 13 with the insertion / removal positioning groove 11 of the inner flange portion 4 of the fixed body 1. ,
The tubular portion 12 is inserted into the large-diameter shaft portion 2 of the fixed body 1. The cylindrical portion 12, which is fitted in the head 9 of the locking shaft 5 so as to be relatively non-rotatable at a specific relational position, pushes the front surface of the lock pin 8 by the tip end surface 15 thereof, and resists the bias of the compression coil spring 7 to prevent the lock pin 8 from moving. Is retracted into the pin receiving hole 6 of the fixed body 1. As a result, the rotation restraint of the locking shaft 5 with respect to the fixed main body 1 is released, so that the locking shaft 5 is rotated to the unlocked position by the key handle 13 and the stopper plate 22 is disengaged from the receiving portion 21 on the box main body 20 side. . This unlocks the door panel 16 from the box body 20. At this stage, since the pulling projection 14 of the key handle 13 is in contact with the back surface of the inner flange 4 of the fixed body 1, the door panel 16 is opened by pulling the key handle 13 toward you.

Although the normal normal operation is as described above, as shown in FIG. 12, the lock groove of the locking shaft 5 is unavoidably caused by the play between the fixed body 1 and the locking shaft 5. Although 10 is not aligned with the pin receiving hole 6 of the fixed main body 1, the pulling projection 14 of the tubular portion 12 comes to a position aligned behind the insertion / removal positioning groove 11 of the fixed main body 1. A worker who visually confirmed that the lock had been reached misunderstood that the lock was established, and pulled out the key handle 13 from the fixed main body 1. After that, the lock shaft 5 was rotated in the unlock direction by the back tension. In that case, the locking shaft 5 is left unlocked with respect to the fixed body 1. The fitting of the cylinder portion 12 to the head portion 9 of the locking shaft 5 is performed such that the locking shaft 5 is in the regular locking position,
Since the shapes of the cylinder portion 12 and the head portion 9 are set so that the shape can be set only when the head portion 9 and the cylinder portion 12 are in the specific positional relationship, the key is not locked when the lock is not established as described above. It is not possible to insert the handle 13 into the fixed body 1.

In this way, the key handle 13 is fixed to the main body 1.
When it cannot be inserted into the large-diameter shaft hole 2 of the fixed main body 1, as shown in FIG. 16, the tubular portion 33 of the correction operation tool 32 having no protrusion such as the towing protrusion 14 formed on the outer surface is inserted. The cylindrical portion 33 is fitted onto the head portion 9 of the locking shaft 5 so as not to rotate relative to each other. Then, the locking shaft 5 is moved by the correction operation tool 32.
Return to the locked position and rotate. In this way, when the locking shaft 5 is corrected and rotated to the regular locking position, the lock groove 10 of the locking shaft 5 comes to a position aligned with the pin receiving hole 6 of the fixed main body 1, so that the compression coil spring 7 urges it to move. The front end of the lock pin 8 enters the lock groove 10, and the locking shaft 5 is rotationally restrained with respect to the fixed body 1. Further, in this state, the cylindrical portion 12 with respect to the head portion 9 of the locking shaft 5 is
Since the pulling projection 14 of the tubular portion 12 can pass through the insertion / removal positioning groove 11 of the fixed body 1, the key handle 13 can be used again for the unlocking operation and the opening operation. become able to.

[0017]

DETAILED DESCRIPTION OF THE INVENTION In the illustrated embodiment, a fixed body 1
The four pin receiving holes 6 and the lock grooves 10 of the locking shaft 9 are formed at 90-degree intervals. Two insertion / removal positioning grooves 11 of the fixed main body 1 and two towing projections 14 of the key handle 13 are formed at 180-degree intervals. The shape is set so that the cylindrical portion 12 of the key handle 13 can be fitted to the head 9 of the locking shaft 5 only in a specific positional relationship by fitting and positioning on the outer surface of the head 9 of the locking shaft 5. This is performed by forming four projections 24 at 90-degree intervals and providing four fitting positioning grooves 25 at 90-degree intervals on the inner surface of the tubular portion 12. The fitting positioning protrusion 24 and the fitting positioning groove 25 also function as a transmission path of a rotational force from the key handle 13 to the locking shaft 5. The shape can be set by setting the head 9 to have a hexagonal cross section and setting the hollow section of the cylindrical portion 12 to have a hexagonal cross section.

On the inner surface of the fitting portion 33 of the correction operation tool 32,
Four fitting positioning grooves 34 are formed at 90-degree intervals. By aligning these fitting and positioning grooves 34 with the fitting and positioning projections 24 of the head 9 of the locking shaft 5, a relative non-rotatable fitting of the correction operation tool 32 to the head 9 of the locking shaft 5 is achieved. , Only possible in a specific positional relationship. The fitting positioning protrusion 24 and the fitting positioning groove 34 also function as a transmission path of a rotational force from the correction operation tool 32 to the locking shaft 5. The shape can be set by setting the head 9 to have a hexagonal cross section and setting the hollow section of the cylindrical portion 33 to have a hexagonal cross section.

Although the key handle 13 and the correction operation tool 32 can be independently prepared as separate entities, in consideration of management and convenience in use, the key handle 13 and the correction operation tool 32 are formed in a T shape like the embodiment shown in FIG. It can also be configured by being integrally connected. In each of the above-described embodiments, the axial length of the tubular portion 33 of the correction operation tool 32 is formed to be shorter than the axial length of the tubular portion 12 of the key handle 13, and the lock pin 8 is provided on the distal end surface 35 of the tubular portion 33. It cannot be pressed. Further, since there is no protrusion similar to the pulling protrusion 14 of the tubular portion 12, it is impossible to pull the fixed main body 1 by the correction operation tool 32 .

In the illustrated embodiment, the fixed body 1 is equipped with a cap 26 for concealing the front opening of the large diameter shaft hole 2 and the head 9 of the locking shaft 5. A shaft cylinder portion 27 is formed so as to project at an eccentric position on the back side of the cap 26, and the shaft cylinder portion 27 is fitted into a shaft hole 28 penetrating the upper portion of the large diameter shaft hole 2 in the front-rear direction, and a washer plate. Screw 3 through 29
It is rotatably attached to the fixed body 1 by 0. The compression coil spring 31 fitted in the shaft tube portion 27 is compressed between the back surface of the cap 26 and the washer plate 29, and the cap 26 is attracted to the front surface of the fixed main body 1.

[0021]

As described above, in the lock device according to the first aspect of the present invention , in the case where the locking shaft is displaced from the regular locking position due to the back tension acting on the locking shaft, the inner collar portion of the fixed main body is provided. There is a correction operation tool that has a cylindrical part at the tip that is inserted into the large-diameter shaft hole of the fixed body without being obstructed by the lock body and is fitted into the head of the locking shaft so that it cannot rotate relative to it. The locking shaft can be returned to the normal position and rotated by a correction operation that can be easily performed by inserting the key into the fixed body and turning the locking shaft, and align the pulling protrusion of the key handle with the slot for insertion and removal of the fixed body. As a result, the key handle can be inserted into the fixed body, and the lock device can be accurately unlocked.

According to the lock device of the invention of claim 2,
In addition to the effect of the invention of claim 1,
Key so that the shaft extends at a right angle from the shaft of the key handle 13.
Since it is integrated with the handle 13,
The correction operation tool 32 is configured to be integrally connected, and is used for management and use.
Sometimes convenient. Furthermore, the lock of the invention of claim 3
In the device, the invention according to claim 1 or the invention according to claim 2 is provided.
In addition to the effect, it fits on the outer peripheral surface of the enlarged head 9 of the locking shaft 5.
Alignment protrusion 24 is formed and the fitting position is determined.
The fitting positioning groove 34 that engages with the female projection 24.
Since it is formed on the tubular portion 33 of the correction operation tool 32, the locking shaft
The non-rotatable fitting of the correction operation tool 32 with respect to the head 9 of FIG.
It is common that fitting can be done only in a specific positional relationship.
To be fitted with these fitting positioning projections 24.
Set positioning groove 34 from correction operation tool 32 to locking shaft 5
Also acts as a transmission path for the rotational force of.

[Brief description of drawings]

FIG. 1 is a front view of a lock device according to an embodiment of the present invention when a key handle is removed, showing a state in which a cap is in an open position and a locking shaft is normally rotationally restrained with respect to a fixed body. ing.

2 is a right side view of the locking device of FIG. 1. FIG.

3 is a rear view of the locking device of FIG. 1. FIG.

4 is a cross-sectional view showing how the lock device of FIG. 1 is mounted on a door panel, which is taken along the line AA of FIG. 1 and the cap is in a closed state.

5 is a cross-sectional view taken along the line AA of FIG. 1, showing a state in which the tubular portion of the key handle is fitted into the large-diameter shaft hole of the fixed main body.

FIG. 6 is a front view of the key handle of FIG.

FIG. 7 is a left side view of the key handle of FIG.

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

9 is a right side view of the locking shaft incorporated in the lock device of FIG. 1. FIG.

10 is a front view of the lock shaft of FIG. 9. FIG.

FIG. 11 is a rear view of the locking shaft of FIG.

FIG. 12 is a front view of the locking device of FIG. 1 showing a state where the locking shaft is displaced from the regular locking position by back tension.

13 is a front view of a correction operation tool used in the locking device of FIG. 1. FIG.

14 is a left side view of the correction operation tool of FIG.

15 is a cross-sectional view taken along the line CC of FIG.

16 is a cross-sectional view when the correction operation tool of FIG. 13 is inserted into the large-diameter shaft hole of the fixed body.

17 is a cross-sectional view taken along the line DD of FIG.

FIG. 18 is a side view showing a cross section of a main part when the key handle and the correction operation tool are integrally formed.

[Explanation of symbols]

1 Fixed Main Body 2 Large Diameter Shaft Hole 3 Small Diameter Shaft Hole 4 Inner Collar 5 Locking Shaft 6 Pin Receiving Hole 7 Compression Coil Spring 8 Lock Pin 9 Locking Shaft Head 10 Lock Groove 11 Insertion / Removal Positioning Groove 12 Tubular 13 Key Handle 14 Pulling projection 15 Front end surface for pushing lock pin 16 Door panel 17 Mounting hole 18 Peripheral screw portion 19 Nut 20 Box body 21 Receiving portion 22 Stopper plate 23 Bolt 24 Fitting positioning projection 25 Fitting positioning groove 26 Cap 27 Shaft tube portion 28 Shaft hole 29 Washer plate 30 Screw 31 Compression coil spring 32 Correction operation tool 33 Tube portion of correction operation tool 34 Fitting positioning groove of correction operation tool

Claims (3)

(57) [Claims] 1. A large-diameter shaft hole and a small-diameter shaft hole are formed in the fixed body in the front-rear direction along the axial direction, and an inner collar portion is formed projectingly on the inner surface of the front end of the large-diameter shaft hole to lock the locking shaft of the fixed body. The small diameter shaft hole is rotatably fitted and a pin receiving hole is axially formed in the fixed body around the small diameter shaft hole, and the lock pin biased forward by a compression coil spring is inserted into the pin receiving hole. , A lock groove is formed on the outer peripheral surface of the enlarged head of the locking shaft arranged in the large-diameter shaft hole of the fixed body, with which a part of the cross section of the lock pin engages, and is inserted into and removed from the inner flange portion of the fixed body. A cylindrical portion is provided at the tip of the key handle, which has a positioning groove formed therein and which is inserted into and removed from the large-diameter shaft hole of the fixed main body and is fitted into the head portion of the locking shaft so as to be relatively non-rotatable in a specific positional relationship. An outer surface is formed with a towing projection that passes through the insertion / removal positioning groove of the fixed body, and the tip surface of the tubular portion is formed. Then, the front surface of the lock pin is pushed to retract the lock pin into the pin receiving hole of the fixed body, thereby releasing the rotational restraint of the locking shaft with respect to the fixed body,
Use the key handle to rotate the locking shaft to the unlocked position,
In a key handle pull-out type locking device in which the pulling projection of the key handle is brought into contact with the back surface of the inner flange portion of the fixed body and pulled by the key handle, the lock mechanism is obstructed by the inner flange portion of the fixed body. Without the fixed shaft, the tubular portion is inserted into the large-diameter shaft hole of the fixed body and is fitted into the head portion of the locking shaft so that it cannot rotate relative to the head portion of the locking shaft. A key handle pull-out type locking device characterized by being returned to and rotated in. 2. The key handle is the shaft of the correction operation tool.
Integrated with the key handle so that it extends at a right angle from the axis of
The key hand according to claim 1, wherein the key hand is provided in
Removable lock device. 3. Fitting to the outer peripheral surface of the enlarged head of the locking shaft
Alignment protrusions are formed to fit and position the protrusions.
The fitting positioning groove that engages with the protrusion is used for the correction operation.
It formed in the said fitting part of the ingredient | tool, The claim 1 characterized by the above-mentioned.
Alternatively, the key handle detachable lock device according to claim 2.
Place