JP3143586B2 - Vehicle door lock 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 lock device particularly effective for a wagon type back door.

[0002]

2. Description of the Related Art Conventionally, when an operator attempts to open a wagon type back door by opening a door opening operation lever in a driver's seat, the back door is heavy and cannot be lifted by the reaction force of the door rubber seal. May be a half latch. In the case of a half-latch, the door cannot be unlocked by operating the door-opening operation lever of the driver's seat, so that the door cannot be opened by one person. It is described and known.

[0003]

The above-mentioned known device has a problem that the structure is complicated. The present application is a half-latch prevention structure which is much simpler in structure than the known example. The present application relates to a lock device particularly effective for a wagon-type back door, but can also be applied to a side door since it is not a half-latch.

[0004]

Accordingly, in the present invention, the lock device 3 is attached to one of the vehicle body 1 and the door 2 and the striker 8 is attached to the other, and the lock device 3 is engaged with the striker 8. A latch 9 which rotates together and a ratchet 10 which engages with a half-latch engagement step 15 or a full-latch engagement step 16 of the latch 9 to prevent reverse rotation of the latch 9; 9, a half-latch prevention plate 18 having an arc-shaped ridge 20 centered on a latch shaft 11 of the latch 9 is integrally attached thereto. The ratchet 10 is provided with the full-latch engaging step portion when the ratchet 10 is opened. A half-prevention lever 23 with a projection 26 that moves together with the ratchet 10 when disengaging from the ratchet 16 is provided. The projection of the serial half-prevention lever 23 2
Reference numeral 6 denotes a vehicle door lock device in which the ratchet 10 does not engage with the half-latch engagement step portion 15 without returning over the arc-shaped protrusion 20. The half prevention lever 23 is a vehicle door lock device connected to the ratchet 10 by a long hole 24 and a pin 25. The side of the arc ridge 20 on the side of the latch shaft 11 is on an inclined surface 21, and the side of the arc ridge 20 on the side opposite to the latch shaft 11 is a substantially right
2 is a vehicle door lock device. The projection 26 has a substantially right-angled surface 27 on the latch shaft 11 side.
On the other hand, the side opposite to the latch shaft 11 is a vehicle door lock device formed on an inclined surface 28. A lock device 3 is attached to one of the vehicle body 1 and the door 2 and a striker 8 is attached to the other. The lock device 3 includes a latch 9 that rotates by engaging with the striker 8 and a half of the latch 9. A ratchet 10 which is engaged with a latch engaging step 15 or a full latch engaging step 16 to prevent the latch 9 from rotating in reverse is provided. A half-latch preventing plate 18 having an arc-shaped ridge 20 is attached to the latch 9 in parallel and integrally with the latch 9. When the ratchet 10 is disengaged from the full-latch engaging step 16 by the door opening operation. A half prevention lever 23 with a projection 26 which moves together with the ratchet 10 is provided via a pin 25 and a long hole 24, and the half prevention lever 23 is The half-latch is formed so as not to go over the arc-shaped ridge 20 and return. The arc-shaped ridge 20 is cut near the half-latch engaging step 15 and the pawl 14 of the ratchet 10 is in a fully opened state. Is a vehicle door lock device configured to contact the outer periphery of the latch 9.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Since the present invention is particularly effective for a wagon type back door, its embodiment will be described with reference to the drawings.
Is a lock device attached to the back door 2. The lock device 3 is configured as shown in FIG. In FIG. 2, reference numeral 4 denotes a metal cover plate, and 5 denotes a metal back plate. A synthetic resin body 6 is provided between the metal cover plate 4 and the metal back plate 5, and the synthetic resin body 6 is provided on the metal cover plate 4 side, that is, on the front side. A recess 9 is formed in the recess 7. A latch 9 that engages with the striker 8 when the door is closed and rotates forward when the door is closed, and a ratchet 10 that engages with the latch 9 and prevents the latch 9 from rotating reversely are provided. Reference numeral 11 denotes a latch shaft for stopping the latch 9, and reference numeral 12 denotes a ratchet shaft for stopping the ratchet 10. A striker engaging groove 13 with which the striker 8 engages when the door is closed is formed on the outer periphery of the latch 9.
When the door is closed, a half-latch engagement step 15 and a full-latch engagement step 16 with which the pawl 14 of the ratchet 10 engages are formed.

On the back side of the synthetic resin body 6 of the latch 9, a half-latch prevention plate 18 parallel to the latch 9 is attached at a distance 17 from the synthetic resin body 6. The base of the half-latch prevention plate 18 is attached to the latch shaft 11, and a part of the arc 19 covers the striker engagement groove 13, the half-latch engagement step 15, and the full-latch engagement step 16. . On the front side of the arc portion 19, an arc ridge 20 having the latch shaft 11 as a center is provided. As shown in FIG. 9, the cross-sectional shape of the arc ridge 20 is such that the latch shaft 11
The side is formed on a substantially right-angled surface 22.

The ratchet 10 is connected to an operating lever (not shown) provided near the driver's seat. When the operating lever is operated to open the door, the ratchet shaft 12 rotates, and the ratchet 10 integrated with the ratchet shaft 12 is provided. Pivots in a direction to disengage from the full latch engagement step 16 (known).
Thus, the half prevention lever 23 is locked to the ratchet 10. That is, a long hole 24 is formed in the head of the half prevention lever 23, a pin 25 projecting from the ratchet 10 is engaged with the long hole 24, and the ratchet 10 is disengaged from the full latch engaging step 16. When the half-prevention lever 23 rotates in the direction, the half prevention lever 23 also moves together. A protrusion 26 is provided at the tip end of the half prevention lever 23.
A substantially right-angled surface 27 is formed on a side of the projection 26 near the latch shaft 11, and an inclined surface 2 is formed on a side far from the latch shaft 11.
8 is formed, and when the projection 26 moves in the unlocking direction, the action of the slope 21 of the ridge 20 and the slope 28 of the projection 26
The projection 26 moves over the arc-shaped ridge 20, but when the projection 26 moves in the anti-locking direction, it is difficult to return due to the engagement between the right-angle surface 22 and the right-angle surface 27. Although illustration is omitted, the half prevention lever 23 is provided with a guide so as to maintain the posture shown in the figure. The projection 26 is located just before the arc-shaped ridge 20, and the claw 14 is engaged with the engaging step portions 15, 16.
It is formed so as to be detached from.

The arc-shaped ridge 20 is provided from a position covering the striker engagement groove 13 to a position near the half-latch engagement stepped portion 15. 23 moves in the locking direction because there is no arc ridge 20, but the claw 1 does not move even if the half prevention lever 23 and the ratchet 10 move in the locking direction.
4 only engages with the outer periphery of the latch 9 as shown in FIG. 7 is the door open position. When the door is closed, the projection 26 moves on the center side of the arc-shaped ridge 20 and is fully latched.

[0009]

Next, the operation will be described. When the back door 2 is closed in the state of FIG. 7, the striker 8 is engaged with the striker engaging groove 13 of the latch 9, and the latch 9 is turned left (forward) in FIG. The pawl 14 of the ratchet 10 urged so as to be elastically attached to the engaging member 9 goes beyond the half-latch engaging step 15 and engages with the full-latch engaging step 16 to be fully latched. FIG. 3 shows the state of the full latch. When the door is opened, when the operation lever in the driver's seat is operated to rotate the ratchet shaft 12 (the ratchet 10 may be directly rotated), the ratchet 10 integrated with the ratchet shaft 12 turns right in FIG. The lever 14 is disengaged from the full latch engagement step 16 and the back door 2 is unlocked by the strong reaction force of the rubber of the door seal. In the case of a wagon-type back door or in the case of a rear door of an ambulance car, since the weight of the vehicle is heavy, it does not move much.
May be engaged with the half-latch engagement step 15 to become a half door. Since the door does not open even with a half-door, it is necessary to return to the driver's seat again and return to re-opening the operation lever, so that it may not be possible to open the door with only one driver.

However, in the present application, when the door is opened by the operation lever, the half prevention lever 23 and the ratchet 10 are opened together.
Moves as shown in FIG.
The projection 26 climbs over the arcuate ridge 20 due to the collision between the inclined surface 28 of 6 and the inclined surface 21 of the ridge 20, and then the right angle surface 22 of the arcuate ridge 20 and the right angle surface 27 of the projection 26 engage and stop. I do. In this state, the claws 14 of the ratchet 10
5 is completely disengaged from the striker engaging groove 13 (FIG. 5), the latch 9 rotates and the striker 8 is disengaged as shown in FIGS. 5 to 6, but in the state of FIG. Since the right-angled surface 27 of the projection 26 is engaged with the right-angled surface 22 of the ridge 20, the pawl 14 of the ratchet 10 does not engage with the half-latch engagement step 15, thereby preventing the half-latch.

[0011]

The conventionally known one has a problem that the structure is complicated. However, according to the present invention, the lock device 3 is attached to one of the vehicle body 1 and the door 2 and the striker 8 is attached to the other.
The lock device 3 is provided with a latch 9 that rotates by engaging with the striker 8, and a latch 9 that engages with a half-latch engagement step 15 or a full-latch engagement step 16 of the latch 9. A half-latch prevention plate 18 having an arc-shaped ridge 20 centered on a latch shaft 11 of the latch 9 is integrally attached to the latch 9, and the ratchet 10 is attached to the latch 9. Is provided with a half prevention lever 23 with a projection 26 which moves together with the ratchet 10 when the ratchet 10 is disengaged from the full latch engagement step 16 by the door opening operation, and the relationship between the half prevention lever 23 and the arc ridge 20 is as follows. When the door is opened, the projection 26 of the half prevention lever 23 is moved to the arc ridge 2.
0, the ratchet 10 is not engaged with the half-latch engagement step 15 without returning to the half-latch engagement step 15.
In addition, since the arc-shaped ridge 20 having the latch shaft 11 substantially at the center can be implemented by simply providing the ratchet 10 with the half prevention lever 23 with the projection 26 that moves together with the ratchet 10, the structure is remarkably different from the conventional one. It is simpler and cheaper. Further, since the half prevention lever 23 is a vehicle back door lock device connected to the ratchet 10 by the elongated hole 24 and the pin 25, the operation is smooth. In addition, the latch shaft 1 of the arc ridge 20
One side is an inclined surface 21, and the opposite side of the latch shaft 11 is a substantially right-angled surface 22.
Since the vehicle back door lock device is formed as described above, it is easy to get over the projection 26, and the engagement after getting over is sure. A lock device 3 is attached to one of the vehicle body 1 and the door 2 and a striker 8 is attached to the other one,
The lock device 3 includes a latch 9 that rotates by engaging with the striker 8 and a half-latch engagement step 15 or a full-latch engagement step 16 of the latch 9 to reverse the rotation of the latch 9. The latch 9 is provided with a latch shaft 11 of the latch 9.
A half-latch preventing plate 18 having an arc-shaped ridge 20 having substantially the center as the center is attached to the latch 9 in parallel and integrally, and the ratchet 10 is disengaged from the full-latch engaging step 16 when the ratchet 10 is opened. A half-prevention lever 23 with a projection 26 that moves together with the ratchet 10 when detached is provided via a pin 25 and a long hole 24.
So that the half-latch is not formed and does not return.
, The pawl 14 of the ratchet 10 is configured to be in contact with the outer periphery of the latch 9 when the door is fully opened and the door 14 is in the fully opened state. It has the effect of being easy. Further, the arc-shaped ridge 20 is cut near the half-latch engagement step portion 15 and the claw 14 of the ratchet 10 in the fully opened state.
Is configured to contact the outer periphery of the latch 9,
When the door is closed, there is an effect of becoming a full latch through a half latch.

[Brief description of the drawings]

FIG. 1 is a rear perspective view of a wagon type vehicle body.

FIG. 2 is a longitudinal sectional view of the lock device.

FIG. 3 is a full latch state diagram of the lock device.

FIG. 4 is a half latch state diagram of the lock device.

FIG. 5 is a view showing a state in which a door is opened in a full latch state.

FIG. 6 is a diagram showing a state in which a half-latch is not formed even when a half-open operation is performed after the door is opened in a full latch state.

FIG. 7 is a diagram showing a state in which the latch is in contact with the peripheral surface of the latch without forming a half;

FIG. 8 is a rear view of the half-latch prevention plate.

FIG. 9 is a sectional view of a half-latch prevention plate.

FIG. 10 is a rear view of the half prevention lever.

FIG. 11 is a sectional view of a half prevention lever.

FIG. 12 is a rear view of the latch.

FIG. 13 is a rear view of the ratchet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body, 2 ... Back door, 3 ... Locking device, 4 ... Metal cover plate, 5 ... Metal back plate, 6 ... Synthetic resin body, 7 ... Depression, 8 ... Striker, 9 ... Latch, 1
0: ratchet, 11: latch shaft, 12: ratchet shaft, 13: striker engaging groove, 14: claw, 15: half latch engaging step, 16: full latch engaging step, 17: interval, 18: half latch Prevention plate, 19 ... Arc part, 20 ...
Arc ridge, 21: inclined surface, 22: substantially right angle surface, 23: half prevention lever, 24: elongated hole, 25: pin, 26: projection,
27: substantially right angle surface, 28: inclined surface.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E05B 65/20 B60J 5/00 E05B 65/32

Claims (5)

(57) [Claims] 1. A lock device 3 is attached to one of the vehicle body 1 and the door 2, and a striker 8 is attached to the other. A latch 9 that rotates by engaging with the striker 8 is provided on the lock device 3. A ratchet 10 for engaging the half-latch engagement step 15 or the full-latch engagement step 16 of the latch 9 to prevent the latch 9 from reversing;
A half-latch prevention plate 18 having an arc-shaped ridge 20 centered on the latch shaft 11 of the latch 9 is integrally attached to the latch 9, and the ratchet 10 is attached to the ratchet 10.
Is provided with a half prevention lever 23 with a protrusion 26 that moves together with the ratchet 10 when the door is disengaged from the full latch engagement step portion 16 by the door opening operation, and the relationship between the half prevention lever 23 and the arc ridge 20 is such that when the door is opened, The protrusion 26 of the half prevention lever 23 does not return over the arc ridge 20 and the ratchet 10
Is a vehicle door lock device that does not engage. 2. The device according to claim 1, wherein the half-prevention lever is provided with an elongated hole and a pin with respect to the ratchet.
5. Vehicle door lock device connected by 5. 3. The vehicle door lock device according to claim 1, wherein the latch shaft 11 of the arcuate ridge 20 is formed on the inclined surface 21 and the anti-latch shaft 11 is formed on the substantially right-angled surface 22. 4. The vehicle door lock device according to claim 1, wherein the latch shaft 11 side of the projection 26 is formed on a substantially right-angled surface 27 and the anti-latch shaft 11 side is formed on an inclined surface 28. 5. A lock device 3 is attached to one of the vehicle body 1 and the door 2, and a striker 8 is attached to the other of the lock device 3. The lock device 3 includes a latch 9 that rotates by engaging with the striker 8. A ratchet 10 for engaging the half-latch engagement step 15 or the full-latch engagement step 16 of the latch 9 to prevent the latch 9 from reversing;
The latch 9 includes a half-latch prevention plate 18 having an arc-shaped ridge 20 having the latch shaft 11 of the latch 9 as a center.
Is attached to the latch 9 in parallel and integrally with the latch 9, and the ratchet 10 is attached to the ratchet 10 when the ratchet 10 is disengaged from the full latch engagement step 16 by an opening operation.
The half prevention lever 23 with the projection 26 that moves with the
5 and a long hole 24, and the half prevention lever 23
In the door opening operation, the projection 26 does not return over the arc ridge 20 and does not become a half-latch, and the arc ridge 20 is cut near the half-latch engagement step 15 to completely open. In the door state, the claws 14 of the ratchet 10
Is a vehicle door lock device configured to contact the outer periphery of the latch 9.