KR20040086067A - Latch device for handle for opening and closing door - Google Patents

Abstract

PURPOSE: A latch assembly of a door opening and closing handle is provided to simply operate an automatic locking mode and a manual locking mode using a mode set-up unit. CONSTITUTION: A mode set-up unit(9) is installed in a rear base end portion(8) of a hook lever(3). When the hook lever is turned to an upright position in the automatic locking mode, a cam lever(11) is turned forward by pressing the mode set-up unit. When the hook lever is turned to the upright position in the manual locking mode, a nose face free from the rear base end portion is installed in the cam lever. When the hook lever is turned to a leaned position in the automatic locking mode or the manual locking mode, the front end portion of a lock lever enters the rotational trace of the rear base end portion of the hook lever.

Description

Latch device of steering wheel for door opening and shutting {LATCH DEVICE FOR HANDLE FOR OPENING AND CLOSING DOOR}

The present invention is a latch device used for a handle for opening and closing a door such as a cargo box of a cargo truck or a container for transportation.

In this kind of cargo box, the left and right doors of the doors are mounted on the sides of the cargo box by hinges, and the lock shaft is rotatably inserted into the upper and lower brackets fixed to the doors. The lock cam is installed at the top, the cam keeper is installed at the upper and lower frames of the cargo box, the handle for opening and closing the door is connected to the lock shaft by the horizontal pivot shaft, and the lock shaft is properly rotated by the door opening and closing handle. By engaging the cam to the cam keeper, the door is locked to the cargo box.

The handle for opening and closing the door needs to be locked to the door by a latching device so that a driver or the like cannot operate it by a person other than a party authorized to prevent theft of the load. In order to comply with this request, a latch device for a conventional door opening / closing handle is pivotally mounted on the main body by a horizontal pivot axis and pivotally mounted on the main body by a horizontal pivot shaft. Install a cross-over groove in which the handle for opening and closing the door is caught or peeled off, and install a first dead point spring mechanism corresponding to the position of the operating force point between the main body and the hook lever and rotating the hook lever in the dodging or standing direction. have.

And a second dead point spring mechanism for pivotally mounting the stopper lever to the main body by another horizontal pivot axis, corresponding to the position of the operating force point between the main body and the stopper lever, and rotating the stopper lever in the front direction or the rear direction. In the state of hooking the hook lever, the stopper lever is rotated in the rearward direction by the second dead point spring mechanism, the lock fixing arm of the stopper lever is engaged with the protrusion of the hook lever, and the lock rotor installed on the main body. Fix the cam disk to the cam disk, and install the cam projection on the cam disk that rotates the stopper lever in the front direction, and engages the interlocking arm of the stopper lever with the projection of the lower end of the hook lever. (For example, refer patent document 1).

When the hook lever is locked in the dowel position through the cam disk fixed to the rotor of the lock, when the door opening / closing handle is dug in along the front upper end of the main body and hits the passive part of the hook lever in the standing position. ， A series of corrective operations will proceed soon, and the lock will be automatically established. To press the front end of the hook lever to rotate the hook lever and take out the handle for opening and closing the door, insert the key into the lock rotor and insert the cam disk. It is necessary to turn the stopper lever in the unlocked direction, and release the hook restraint (hereinafter, the hook lever is hit by the door opening / closing handle. The operating mode that holds is called `` auto lock mode ''.

When all cargo loading and unloading work in one place is completed and the cargo truck is moved to the next loading and unloading place, the hook lever is corrected in earnest from the viewpoint of preventing the accidental opening of the door while driving. The auto lock mode to be used is an optimal use mode.

However, in a certain place, if the load is repeatedly piled up and lowered for a short time and the driver returns immediately to the place of the cargo truck, the auto lock mode that requires the use of a key every time the door is opened or closed is considered in terms of workability. Some users are uncomfortable because of lack of flexibility.

Such a user can rotate the hook lever upright by pressing the front proximal end while repeating the stacking and unloading of the load several times within a short time, and after the stacking and unloading of the last load is finished, the hook lever is used in earnest using the key. It is enough if it can be corrected in the following. (Hereafter, the hook lever can only swing when the door opening and closing handle is closed, and it is an operation mode that requires the use of a key when correcting the hook lever in earnest. ").

As described above, the demand for the use mode of the clasp device may be different by the user.However, as a maker, it is quite complicated to manufacture two kinds of clasp devices having different configurations and corresponding to different use modes, and it is difficult to increase the mass production effect. Cost savings of clasps are hampered and inventory management and inventory burdens are increasing.

(Patent Document 1) Japanese Patent Application Laid-Open No. 8-16419

Accordingly, an object of the present invention is to determine whether or not a single component called a use mode setting body is installed in a step of shipping from a factory, delivering to a user, or installing a product in a box. It is to provide a latch mechanism for the door opening and closing handle that can be easily switched to manual lock mode.

BRIEF DESCRIPTION OF THE DRAWINGS The front view of the use state of the latch apparatus of the handle for opening and closing a door which concerns on one Embodiment of this invention.

FIG. 2 is a perspective view of the front side of the latch device of FIG. 1. FIG.

3 is a perspective view of the back seat of the latch device of FIG.

Figure 4 is a perspective view from the back side of the latch device of Figure 1;

5 is a cross-sectional view taken along the line A-A of FIG.

FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 5.

7 is a perspective view of a hook lever used in the latch device of FIG.

FIG. 8 is a perspective view of the base plate of the first dead point mechanism used in the latch device of FIG. 1. FIG.

9 is a perspective view of the apron portion of the main body used in the latch device of FIG.

10 is a perspective view of the cam lever used in the latch device of FIG.

FIG. 11 is a perspective view of a lock lever used in the latch device of FIG. 1. FIG.

12 is a longitudinal sectional view in the case where the latch device of FIG. 1 is used in the auto lock mode, and the hook lever is in a locked state, and the display of the lock is omitted for simplicity of illustration.

FIG. 13 is a longitudinal cross-sectional view when the key is inserted and rotated to release the hook lever in the state shown in FIG. 12, and the display of the lock is omitted.

FIG. 14 is a longitudinal sectional view when the front base end of the hook lever is pressed in the state shown in FIG. 13 and the hook lever is tilted and rotated to the standing position, and the display of the lock is omitted.

15 is a longitudinal sectional view in the case where the latch device of FIG. 1 is used in the manual lock mode, and the hook lever is in a locked state, and the display of the lock is omitted for simplicity of illustration.

FIG. 16 is a longitudinal cross-sectional view when the key is released in the state of FIG. 15 when the key is inserted and rotated to release the hook lever, and the display of the lock is omitted. FIG.

FIG. 17 is a longitudinal sectional view when the front base end of the hook lever is pressed in the state shown in FIG. 16 and the hook lever is tilted and rotated to the standing position, and the display of the lock is omitted.

18 is a front view of a latch device according to another embodiment of the present invention.

19 is a longitudinal cross-sectional view of the latch device of FIG.

In the latch device for the door opening / closing handle of the present invention, the intermediate portion of the hook lever 3 inserted into the split groove portion 2 of the main body 1 can pivot freely to the main body 1 by the horizontal pivot shaft 4. And a transverse groove (6) on which the handle (5) for opening / closing the door is caught or peeled off at the rear end of the hook lever (3), and at the position of the force point between the main body (1) and the hook lever (3). Correspondingly, a first dead point spring mechanism 7 for pressing the hook lever 3 in a rolling direction or a standing direction is provided.

According to the selected use mode, the use mode setting body 9 is attached to the rear base end 8 of the hook lever 3, and the cam lever 11 is pivotally mounted to the main body 1 by the horizontal pivot shaft 10. A second dead point spring mechanism 12 is provided between the main body 1 and the cam lever 11 to correspond to the position of the operating force point and to pressurize the cam lever 11 in the front direction or the rear direction.

When the hook lever 3 is tilted to the standing position in the auto lock mode, the cam lever 11 is rotated to the front direction by pressing the use mode setting body 9, and the hook lever 3 is rotated in the manual lock mode. At the site of the first dead point spring mechanism 7 side than the horizontal pivot shaft 10, the nose face 13 which is not pressed by the rear base end 8 of the hook lever 3 when the inclined rotation to the standing position is rotated. It is attached to the cam lever 11, and the cam lever 11 is attached to the 1st manual cam part 14 and the 2nd manual cam part 15 in the site | part on the side of the 2nd dead point spring mechanism 12 rather than the horizontal pivot shaft 10. As shown in FIG. Install on.

The lock lever 16 disposed on the front side of the cam lever 11 is pivotally mounted on the main body 1 by the horizontal pivot shaft 10, and the hook lever 3 is placed in the auto lock mode and the manual lock mode. When rotating, the cam holding spring member 17 for rotationally pressing the lock lever 16 so that the front end of the lock lever 16 enters the rotational trajectory of the rear base end 8 of the hook lever 3. It is installed between the lever 11 and the lock lever 16.

When the lock 18 is attached to the main body 1, the operation plate 20 is fixed to the rotor 19 of the lock 18, and the cam lever is rotated in a specific direction in the auto lock mode. A first drive cam portion 21 for pressing the first manual cam portion 14 of (11) and tilting the cam lever 11 in the back direction is provided at one end of the operation plate 20, and in the manual lock mode. When the rotor 19 is rotated in the opposite direction to the specific direction, the second drive cam portion 22 for pressing the second manual cam portion 15 of the cam lever 11 to incline the cam lever 11 in the rear direction. ) Is attached to the other end of the operation plate 20.

Then, when the finger is released from the key 24 inserted into the key hole 23 of the rotor 19, and the key 24 is released, the first drive cam portion 21 of the operation plate 20 is the cam lever ( Returning from the first manual cam portion 14 of the 11, and the second driving cam portion 22 of the operation plate 20 is separated from the second manual cam portion 15 of the cam lever 11, the return spring member ( The rotor 19 is rotated by 25).

(Action of invention)

When the auto lock mode is set, the use mode setting body 9 is attached to the rear lower end portion 8 of the hook lever 3. 1, 5 and 12, when the door 26 of the cargo box is closed, and the door opening and closing handle 5 is engaged with the transverse groove 6 of the hook lever 3, The elastic repulsive force of the first dead point spring mechanism 7 acts as a force for rotating the hook lever 3 in the counterclockwise direction about the horizontal pivot axis 4 in FIG. The tip 3a of the hook lever 3 hits the front face 1a of the main body 1.

The elastic repulsive force of the second dead point spring mechanism 12 acts as a force for rotating the cam lever 11 in the counterclockwise direction about the horizontal pivot axis 10 in FIG. 12, and the cam lever 11. Is maintained at a position inclined to the front side.

When the cam lever 11 is in the inclined position in the front direction, the lock lever 16 is inclinedly inclined upwardly about the horizontal pivot shaft 10, and the tip end 16a of the lock lever 16 is inclined. Is located on the rotational trajectory of the back base end 8 of the hook lever 3. Therefore, when trying to rotate the hook lever 3 clockwise about the horizontal pivot axis 4 in FIG. 12, the use mode setting body 9 is directly connected to the tip 16a of the lock lever 16. FIG. The hook lever 3 cannot rotate sufficiently in the same direction, that is, in the release direction.

When the cargo truck arrives at a predetermined place and loads and unloads the load, the predetermined key 24 is inserted into the key hole 23 of the lock 18, and the elastic repulsive force of the return spring member 25 Against the force of the two dead point mechanism 12, the rotor 19 is rotated in the counterclockwise direction in Fig. 6, the cam lever 11 by the first drive cam portion 21 of the operation plate 20 Press the first manual cam portion (14).

The cam lever 11 is rotated clockwise in FIG. 12 around the horizontal pivot shaft 10 by this pressing operation, and the cam lever 11 is inclinedly rotated in the rear direction as shown in FIG. To reach.

Since the direction of action of the second dead point spring mechanism 12 is reversed during the rotation, the cam lever 11 is held at the rotation end position.

In this state, the front end portion 16a of the lock lever 16 moves outward of the rotational trajectory of the rear base end 8 of the hook lever 3, so that the rotational restraint of the hook lever 3 is released.

Then, the front proximal end 3b of the hook lever 3 is pressed against the force of the first dead point spring mechanism 7, and the hook lever 3 is centered on the horizontal pivot shaft 4 in FIG. 13. Rotate clockwise.

In the middle of this rotation, the direction of action of the first dead point spring mechanism 7 is reversed, and the hook lever 3 is inclinedly rotated to an upright position as shown in Fig. 14, and the handle 5 for opening and closing the door opens. Release the constraint.

By rotating the door opening / closing handle 5 drawn out from the main body 1 in a specific direction, the lock shaft is rotated to the unlocked side, and the lock cam escapes from the cam keeper, The lock is released and the door 26 is opened by pulling the door opening and closing handle 26 forward.

After the stacking and lowering work of the load is completed, the door 26 is closed, the door opening and closing handle 5 is rotated to the opposite side to the specific direction, the lock shaft is rotated to the visibility side, the lock cam is the cam In engagement with the keeper, the door 26 is locked to the cargo box.

After that, the door opening and closing handle 5 is inserted into the main body 1 to cross the hook lever 3.

The side surface 5a of the handle 5 for door opening and closing hits the passive part comprised in the inner surface 6a of the groove part 6. Therefore, the hook lever 3 rotates in the counterclockwise rotation direction in FIG. 14 about the horizontal pivot axis 4 against the force of the first dead point spring mechanism 7, and the inverting illustrated in FIG. 12. Return to position

The direction of action of the first dead point spring mechanism 7 is reversed during this rotation. In the process of rotating the hook lever 3 to the doped position, since the side portion 16b of the lock lever 16 is pressed by the proximal end 3c of the hook lever 3, the lock lever 16 pivots horizontally. With reference to the shaft 10, in Fig. 14, the clockwise rotation is retracted slightly by an angle, and the passage of the hook lever 3 is allowed.

In the terminal stage in which the hook lever 3 returns to the doped position shown in FIG. 12, the use mode setting body 9 of the rear proximal end 8 of the hook lever 3 is the nose portion 13 of the cam lever 11. Press.

By this pressing operation, the cam lever 11 rotates counterclockwise in FIG. 14 around the horizontal pivot shaft 10, and reaches a position inclinedly rotated in the front direction as shown in FIG.

As a result, one cycle of the auto lock mode is completed, and the hook lever 3 is automatically corrected in earnest without the need to rotate the rotor 19 to the visibility side with the key 24.

When the manual lock mode is set, the use mode setting body 9 is not attached to the rear lower end 8 of the hook lever 3 as shown in Figs. 15, 16, and 17.

When the door 26 of the box is closed and the handle 5 for opening and closing the door is engaged with the transverse groove 6 of the hook lever 3, the elastic repulsive force of the first dead point spring mechanism 7 becomes 15, the hook lever 3 acts as a force for rotating and pressing the hook lever 3 in the counterclockwise direction about the horizontal pivot axis 4, and the tip 3a of the hook lever 3 in the doped position is the main body ( It hits the front surface 1a of 1).

The elastic repulsive force of the second dead point spring mechanism 12 acts as a force to rotate the cam lever 11 in the counterclockwise direction about the horizontal pivot axis 10 in FIG. 15, and the cam lever 11. Is maintained at a position inclined to the front side.

When the cam lever 11 is in the inclined position in this manner, the lock lever 16 is inclined upwardly with respect to the horizontal pivot axis 10, and the front end portion of the lock lever 16 16a) is located on the rotation trajectory of the back base end 8 of the hook lever 3 at a predetermined distance from the back base end 8. Therefore, when the hook lever 3 is rotated clockwise in FIG. 15 around the horizontal pivot shaft 4, the rear end proximal end 8 is the front end portion 16a of the lock lever 16 at a predetermined angled rotation stage. ), The hook lever 3 cannot sufficiently rotate in the unlocking direction.

When the cargo truck arrives at a predetermined place and starts to load and unload the load, the predetermined key 24 is inserted into the key hole 23 of the lock 18, and the elastic repulsive force of the return spring member 25 In response to the force of the second dead point mechanism 12, the rotor 19 is rotated in the counterclockwise direction in FIG. 6, and the cam lever 11 is driven by the first drive cam portion 21 of the operation plate 20. FIG. Press the first manual cam section 14).

The cam lever 11 is rotated clockwise in FIG. 15 around the horizontal pivot shaft 10 by this pressing operation, and the cam lever 11 is inclinedly rotated in the rear direction as shown in FIG. To reach.

Since the direction of action of the second dead point spring mechanism 12 is reversed during the rotation, the cam lever 11 is held at the position of the rotation end. In this state, since the tip end portion 16a of the lock lever 16 moves outside the rotational trajectory of the rear base end portion 8 of the hook lever 3, the rotational restraint of the hook lever 3 is released.

Then, the front proximal end 3b of the hook lever 3 is removed from the first dead point spring mechanism 7.

Pressing against this force, the hook lever 3 is rotated clockwise about the horizontal pivot axis 4 in FIG.

In the middle of this rotation, the direction of action of the first dead point spring mechanism 7 is reversed, and the hook lever 3 is inclinedly rotated to an upright position as shown in Fig. 17, and the handle 5 for opening and closing the door Release the constraint.

By rotating the door opening / closing handle 5 drawn out from the main body 1 in a specific direction, the lock shaft is rotated to the unlocked side, and the lock cam escapes from the cam keeper, The lock is released and the door 26 is opened by pulling the door opening and closing handle 26 in front.

After one stacking and unloading operation of the cargo is finished, the door 26 is closed to prevent theft of the cargo, the door opening and closing handle 5 is rotated to the opposite side to the specific direction, and the lock cam is locked to the visibility side. Rotated, the lock cam engages with the cam keeper, and the door 26 is locked to the load box.

Then, when the handle 5 for opening and closing the door is inserted into the main body 1, the side surface of the handle 5 for opening and closing the door 5 is formed in the passive part formed in the inner surface 6a of the transverse groove 6 of the hook lever 3. 5a) bumps into Therefore, the hook lever 3 rotates in the counterclockwise rotation direction in FIG. 17 about the horizontal pivot axis 4 against the force of the first dead point spring mechanism 7, and the bowing illustrated in FIG. 16. Return to position The direction of action of the first dead point spring mechanism 7 is reversed during this rotation.

In the process of rotating the hook lever 3 to the doped position, the side portion 16b of the lock lever 16 is not pressed by the proximal end surface 3c of the hook lever 3, and the hook lever 3 Since the back proximal end 8 does not press the nose part 13 of the cam lever 11, the cam lever 11 is not related to the rotation of the hook lever 3, and does not rotate at all.

Therefore, at the start of the next stacking operation, it is not necessary to insert and rotate the key 24. As described above, the hook lever 3 is inclined immediately to the standing position by pressing the front base end 3b. The handle 5 for opening and closing the door can be taken out from the main body 1.

In subsequent stacking and unloading operations, it is not necessary to use the key 24 as well.

When the final stage of the manual lock mode, that is, completing all the stacking and unloading operations in the same place and moving the cargo truck to the next stacking and unloading place, a predetermined key is inserted into the keyhole 23 of the lock 18. (24) is inserted, and the rotor 19 is rotated clockwise in FIG. 6 against the elastic repulsion force of the return spring member 25 and the force of the second dead point mechanism 12, and the operation plate The second manual cam portion 15 of the cam lever 11 is pushed by the second drive cam portion 22 of 20.

By the pressing operation, the cam lever 11 rotates in the counterclockwise direction in FIG. 16 about the horizontal pivot shaft 10, and the cam lever 11 is inclinedly rotated in the front direction as shown in FIG. Reach position.

Since the acting direction of the second dead point spring mechanism 12 is reversed during the rotation, the cam lever 11 is maintained at the position of the rotation end.

Thereby, the hook lever 3 is corrected with respect to the main body 1, and one cycle of the manual lock mode is completed.

(Embodiment of invention)

In the example of illustration, the attachment hole 27 of the main body 1 with respect to the door 26 is open in the back side of the main body 1, and the main body 1 is the door 26 through the packing 28. As shown in FIG. ) Is fixed by a fastening bolt (not shown) from the back side. Therefore, when the door 26 is closed and locked, the corresponding fastening bolts cannot be accessed, and the removal of the latch device by the unauthorized authority from the outside of the cargo box is impossible. In addition, the horizontal pivot shaft 4 of the hook lever 3 and the horizontal pivot shaft 10 of the cam lever 11 and the lock lever 16 are not exposed to the outer surface portion of the main body 1. This improves the security of the latch device.

The main part of the main body 1 is made of aluminum die-cast, and the apron portion 29 of the main body 1 which is in sliding contact when the door opening / closing handle 5 enters and exits is made of a metal material such as stainless steel which is excellent in impact resistance and wear resistance. It is formed of and improves the contents of the latch device. The apron portion 29 is joined to the main body portion of the main body 1 by a fastening screw 31 passing through the transmission hole 30. The attachment hole 27 of the apron portion 29 is in a concealed position behind the door opening and closing handle 5. Therefore, in the locked state, the fasteners inserted into the attachment holes 27 cannot be accessed.

In the embodiment shown in Figs. 1 to 17, the main body 1 has a cap 32 for concealing the front portion of the lock 18 pivotally mounted at the upper end by a horizontal pivot shaft 33, for dustproof and waterproof measures. This is done. The cap 32 is rotationally pressurized in the closing direction by a torsion coil spring 34 fitted to the horizontal pivot shaft 33, and the fixing stopper 35 made of rubber or soft plastic on the rear surface of the lower end of the cap 32, It is adapted to elastically engage the seating hole 36 on the main body 1 side at the time of closing. As a result, the cap 32 comes into close contact with the main body 1 to improve dust and water resistance.

The main body 1 has a U-shape so as to correspond to the lower half of the cross groove 6 of the hook lever 3.

The receiving groove 59 is formed, and the external force is distributed to the handle 5 for opening and closing the door.

The first dead point spring mechanism 7 is inserted into the rear opening of the main body 1 and fixed to the rear opening of the hook lever 3 and the base plate 38 fixed by the fastening screw 37. A spring guide plate in which the shaft 39 and the base receiving groove 41 are fitted to the branch plate portion 42 of the base plate 38, and the tip receiving groove 43 is fitted to the transverse shaft 39. 40 and a compression coil spring 44 fitted to the spring guide plate 40 and compressed between the base plate 38 and the enlarged head of the spring guide plate 40.

The second dead point spring mechanism 12 includes a support plate 45 which is press-fitted to the rear opening of the body 1, a downward arm 46 of the cam lever 11, and a support hole of the support plate 45. The base end portion is inserted into the 47, the front end portion is fitted to the spring guide plate 49 and the spring guide plate 49 connected to the downward arm 46 by the horizontal pivot shaft 48, 45 and a compression coil spring 50 compressed between the enlarged head of the spring guide plate 49.

The second manual cam portion 15 of the cam lever 11 is bent to the front end side of the lower arm 46. For this reason, the second manual cam portion 15 of the cam lever 11 is located farther from the horizontal pivot shaft 10 than the first manual cam portion 14.

The use mode setting body 9 is constituted by a screw, and the screw shaft portion is twisted to the screw hole 51 of the rear proximal end 8 of the hook lever 3.

The posture maintenance spring 17 of the lock lever 16 is comprised by the torsion coil spring, and the coil part is fitted to the horizontal pivot shaft 10. As shown in FIG. The lock lever 16 is such that the proximal shoulder portion 52 abuts the root portion of the nose portion 13 of the cam lever 11.

The return spring member 25 of the operation plate 20 is comprised by the torsion coil spring, and the coil part is fitted to the outer side of the rotor 19. As shown in FIG.

As the lock 18, a well-known cylinder lock is used, and the outer cylinder 53 of the lock 18 has a front side in the receiving hole 54 of the front wall of the main body 1 and the receiving hole 55 of the support plate 45. It is inserted into the main body 1 by inserting the clip board 56 made from the spring into the main surface groove 57 of the outer cylinder 53. As shown in FIG. The operation plate 20 is fitted to the rotor 19 in a non-rotating manner relative to each shaft portion, and is fixed to the rotor 19 by an E ring 58 so as not to be detachably attached. The first drive cam portion 21 and the second drive cam portion 22 are bent at each end of the operation plate 20. The cap 32 may be omitted as shown in FIGS. 18 and 19.

The latch device of the present invention configured as described above can be used for the auto lock mode and the manual lock mode according to the user's selection. The use mode setting body 9 is connected to the hook lever 3 to switch the use mode. This is extremely simple depending on whether or not it is mounted on the back proximal end 8.

It is not necessary to separately manufacture the latch device for the auto lock mode and the latch device for the manual mode separately, and it is sufficient to produce and install only one type of the common latch device with the use mode setting body 9 as an optional part. Production cost can be reduced by mass production effect.

It is good to store one kind, so that the stock storage space can be saved, and the trouble of o-delivery and the exchange is eliminated, and the stock management and delivery management are simplified.

Claims (1)

The intermediate part of the hook lever 3 inserted into the divided groove 2 of the main body 1 pivotally mounts to the main body 1 freely by the horizontal pivot shaft 4, and the front door part of the hook lever 3 is swollen. A transverse groove portion 6 is provided, in which the handle 5 for opening and closing is caught or peeled off, and the hook lever 3 is placed in a doping or standing direction corresponding to the position of the force point between the main body 1 and the hook lever 3. The first dead point spring mechanism (7) for rotating and pressing According to the selected use mode, the use mode setting body 9 is attached to the rear base end 8 of the hook lever 3, and the cam lever 11 is pivotally mounted to the main body 1 by the horizontal pivot shaft 10. A second dead point spring mechanism 12 is disposed between the body 1 and the cam lever 11 to rotate and pressurize the cam lever 11 in the front direction or the back direction corresponding to the position of the operating force point. When the hook lever 3 is tilted to the standing position in the auto lock mode, the cam lever 11 is rotated to the front direction by pressing the use mode setting body 9, and the hook lever 3 is rotated in the manual lock mode. On the cam lever 11, a nose face 13, which is not pressed by the rear proximal end 8 of the hook lever 3, is rotated to the upright position, and the first manual cam portion 14 and the second manual cam portion are provided. (15) is provided on the cam lever 11 at the site of the second dead point spring mechanism 12 side than the horizontal pivot shaft 10, The lock lever 16 disposed on the front side of the cam lever 11 is pivotally mounted on the main body 1 by the horizontal pivot shaft 10, and the hook lever 3 is set in the auto lock mode and the manual lock mode. The cam lever of the posture holding spring member 17 which presses the lock lever 16 so that the tip of the lock lever 16 enters the rotational trajectory of the rear base end 8 of the hook lever 3. Between 11 and lock lever 16, When the lock 18 is attached to the main body 1, the operating plate 20 is fixed to the rotor 19 of the lock 18, and the cam lever is rotated in a specific direction in the auto lock mode. A first drive cam portion 21 for pressing the first manual cam portion 14 of (11) and tilting the cam lever 11 in the back direction is provided at one end of the operation plate 20, and in the manual lock mode. When the rotor 19 is rotated in the opposite direction to the specific direction, the second drive cam portion 22 for pressing the second manual cam portion 15 of the cam lever 11 to incline the cam lever 11 in the rear direction. ) Is installed at the other end of the operation plate 20, When releasing the key 24 inserted into the key hole 23 of the rotor 19, the first drive cam portion 21 of the operation plate 20 is moved from the first manual cam portion 14 of the cam lever 11. The rotor 19 is rotated by the return spring member 25 so that the second drive cam portion 22 of the operation plate 20 is separated from the second manual cam portion 15 of the cam lever 11. Door latch device for opening and closing the door, characterized in that made.