JPH0650045A - Door opening and closing device - Google Patents

Abstract

PURPOSE:To improve operation efficiency by causing a passive lever to move linearly for turning a latch member and reducing the loss of torque transmitted from the passive lever to the latch member at an engagement position. CONSTITUTION:An active lever 41 and a passive lever 42 are made to perform horizontal linear motion, guided by the horizontal sections 41aa, 42aa and the slope sections 41ab and 42ab of respective slits 41a and 41b. Consequently, the engagement section 42d of the lever 42 performs linear motion, while travelling along the rotational locus of the lever 27. Also, while the lever 27 is being dragged by the engagement section 42d, dislocation at the coupled section thereof is limited to unidirectional turning, because the section 42d is performing linear motion. According to this construction, the loss of torque from the engagement section 42d to the latch lever 27 is reduced, thereby improving torque transmission efficiency.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closing device for automatically retracting a door in a non-fully closed state to bring it into a completely closed state.

[0003]

2. Description of the Related Art Conventionally, as a door closing device of this type,
The one disclosed in Japanese Patent Laid-Open No. 2-96079 is known. This is because by rotating the passive lever of the closing mechanism arranged on the door by the operation of the drive mechanism,
The push lever is engaged with the latch member arranged on the door to rotate the latch member, and the rotation of the latch member causes the locked member arranged on the vehicle body to be engaged with the latch member and retracted. As a result, the door was changed from the non-fully closed state to the fully closed state.

[0004]

However, in the above-described door closing device, since the latch lever is rotated by the rotation of the push lever to engage with the latch member, the push lever and the latch member are combined. The engaging portion is displaced in two directions by the rotational movement of both the passive lever and the latch member (sliding contact between the passive lever and the latch member).
Occurs. For this reason, a large loss occurs in the torque transmission from the passive lever to the latch member, and the operation efficiency of rotating the latch is deteriorated.

Therefore, it is a technical problem of the present invention to improve the operating efficiency.

[0006]

[Constitution of the invention]

[0007]

In order to solve the above technical problems, the technical measures taken in the present invention include a structure such as a vehicle body, a door arranged to be openable and closable in the structure,
One of the structure and the door is rotatably disposed, and by a rotation operation, engages with a locked member disposed on the other of the structure and the door to move the door to the structure. A door locking mechanism having a latch member that holds the latch member in a closed state with respect to the latch member, and the structure and the door are linearly movably disposed and engaged with the latch member by a linear movement operation to move the latch member. That is, it has a closing mechanism having a passive lever for rotating operation, and a drive mechanism arranged on the structure and the door for linearly moving the passive lever.

[0008]

According to the above-mentioned technical means, the displacement generated at the engaging portion between the passive lever and the latch member is only the displacement in one direction due to the rotational movement of the latch member. This allows
The loss of torque transmission from the passive lever to the latch is reduced, and the operating efficiency is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the door closing device 1
Is a support including a door lock mechanism 2 and a bracket 31 and a bracket 32 which are mounted on a door lock mechanism 2 and a door lock mechanism 2 which are arranged in a door (not shown) which is openably and closably supported by a vehicle body (not shown). The member 3 includes a closing mechanism 4 supported by the support member 3 and linked to the door locking mechanism 2, and a drive mechanism 5 supported by the support member 3 and linked to the closing mechanism 4.

The door locking mechanism 2 will be described.

As shown in FIG. 2, a pole 22 and a latch 23 are rotatably supported in a case 21 by a pole shaft 22a and a latch shaft 23a, respectively. The latch 23 is provided with an engagement groove 23a that engages with a striker 24 fixed to the vehicle body that comes in through a groove 21a formed in the case 21 when the door is closed and a striker 2 and an engagement groove 23a. Claw portion 2 that engages with the pole 22 in the engaged state (latched state of one-dot chain line or two-dot chain line in FIG. 2)
3b and 23c are formed respectively. The pole 22 is constantly urged by a spring 25 in a direction in which it engages with the claw portions 23b and 23c of the latch 23, and the latch 3 is disengaged from the striker 24 by the spring 26 (see FIG. 2). It is always biased in the direction of the dashed line (unlatched state).

In the latch state, the latch 23 is
The rotation of the pawl portion 23b is restricted by the engagement between the pawl portion 23b and the pole 22 (half-latched state shown by the alternate long and short dash line in FIG. 2), and the door is held in a semi-closed state (incompletely closed state). Two
By the engagement of 3c and the pole 22 (the full-latch state shown by the solid line in FIG. 2), the rotational movement thereof is restricted, and the door is held in the fully closed state (fully closed state). Further, as is well known, the pole 22 is linked to an inside door handle (not shown) and an outside handle (not shown) for opening and closing the door, and the pawl portion 23b is attached to the pole 4 by operating each handle. , 23c are linked with a well-known open lever (not shown) for performing a rotation operation for releasing the engagement. The latch shaft 23a extends outward through the case 21, and a latch lever 27 linked to the closing operation mechanism 4 described later is fixed to the tip of the latch shaft 23a so as to rotate integrally with the latch 23 ( (See Figure 1). As is well known, the door closing operation is not performed by the operation of each handle, but is performed by directly pressing the door in the closing direction.

The closing mechanism 4 will be described.

As shown in FIGS. 1, 3 and 4, an L-shaped bracket 31 is fixed on the case 21 of the door locking mechanism 2, and the bracket 31 has an active lever 41 and a rod-shaped active lever 41. The L-shaped passive levers 42 are arranged opposite to each other and supported. Support shafts 31a and 31b are planted in the bracket 31,
The active lever 41 and the passive lever 42 are formed with elongated holes 41a, 41b, 42a, 42b having the same length, respectively. The support shaft 31a and the support shaft 31b are slidably inserted into the long holes 41a and 42a and the long holes 41b and 42b, respectively, so that the active lever 41 and the passive lever 42 can be inserted into the long hole 4 with respect to the bracket 31.
It is supported so as to be linearly movable within the range of 1a, 41b, 42a, 42b. The elongated holes 41a and 42a are formed by the horizontal portions 41aa and 42aa and the inclined portions 41ab and 42a.
b. As a result, the linear movement of the passive lever 42 is a horizontal linear movement guided by the horizontal portions 41aa, 42aa and a rotational linear movement guided by the inclined portions 41ab, 42ab. The long holes 41b, 4
2b has a linear shape. An elongated hole 41c is formed in the active lever 41, and a drive mechanism 5 described later is linked thereto. The passive lever 42 is formed with an engaging portion 42d that can be engaged with the latch lever 27 and that is arranged in a vertical state with respect to the rotating surface of the latch lever 27. Further, a winding portion 43a is locked between a bracket 31 and the passive lever 42 by a locking portion 31c formed on the bracket 31, and one end 43b is fixed on the bracket 31.
There is provided a torsion spring 43 which is locked to the lock lever 42 and the other end 43c of which is locked to a locking portion 42c formed on the passive lever 42, and the passive lever 42 receives the urging force of the torsion spring 43, as shown in FIG. It is biased in the left direction to the initial position shown in FIG. 1 (support shaft 31a is elongated hole 41a,
1 is the right end of FIG.
And the support shaft 31b is held at the right end of the elongated holes 41a and 42a in FIG. 1).

The passive lever 42 is formed with a protruding shaft 42e which is punched out toward the active lever 41 by press molding. A cancel lever 44 is rotatably supported on the protruding shaft 42e, and the active lever 4 is
1 and the passive lever 42. A pressing wall 44a and a restricting wall 44b are formed at the tip of the cancel lever 44. The active lever 41 has a passive lever 42 formed by press molding.
A protrusion 41d is formed on the side, and the rotation of the cancel lever 44 causes the cancel lever 4 to move.
The pressing wall 44a and the restriction wall 44b of No. 4 are arranged to be disengaged from each other. The cancel lever 44 is linked to an open lever via a lever 46 (see FIG. 1) rotatably supported by the bracket 31. In addition, the winding portion 4 is provided between the passive lever 42 and the cancel lever 44.
5a is locked to a locking portion 42f formed on the passive lever 42, one end 45b is locked to a locking portion 42f of the passive lever 42, and the other end 45c is locked to a locking portion 44c formed on the cancel lever 44. A stopped torsion spring 45 is provided, and the cancel lever 44 receives the urging force of the torsion spring 43.
It is urged counterclockwise as shown in FIG.
4a and the regulation wall 44b are engaged with the protrusion 42f)
Held in.

The drive mechanism 5 will be described.

As shown in FIG. 1, the bracket 32 fixed to the bracket 31 has a plurality of gears (not shown).
The speed reduction mechanism 51 configured by combining the above is fixed.
A motor 52 is attached to an input shaft (not shown) of the reduction mechanism 51.
Are connected, and the cam lever 53 is connected to the output shaft 51a. This cam lever 53 has a cam shaft 53a.
Is formed, and the long hole 41c of the active lever 41 is formed.
The side wall 41ca or the side wall 41cb of the elongated hole 41c is abutted and pressed by the rotating operation.

Next, the operation will be described.

FIG. 1 shows the initial state of the door locking mechanism 2
The door of the latch 23 is opened in the unlatched state of the chain double-dashed line shown in FIG. 2, and the active lever 41 and the passive lever 42 of the closing mechanism 4 contact the cam shaft 53a of the cam lever 53 and the side wall 41ca of the slot 41c. The contact pressing and torsion springs 43 hold the cancel levers 44 in the initial positions shown in FIGS. 1 and 5, respectively, and the torsion springs 45 rotate and bias the cancell levers 44 to hold them in the locked state.

When the door is closed in this state, the striker 24 enters the groove 21a of the case 21 and engages with the engaging groove 23a of the latch 23 to engage the latch 2 with the latch 2.
3 is rotated to enter the half-latched state indicated by the alternate long and short dash line in FIG. 2 and the striker 24 is retracted, so that the door is in the half-closed state. At this time, the latch lever 27 also rotates in the same manner as the latch 23, and enters the state shown in FIG. When the latch lever 27 changes from the state shown in FIG. 1 to the state shown in FIG. 5, the passive lever 42 is at the initial position and the support shaft 31a is located at the inclined portion 42ab of the slot 42a.
Are retracted from the turning locus of the latch lever 27.
Therefore, the rotation of the latch 23 is not hindered by the interference between the latch lever 27 and the engaging portion 42d.

When the half-closed state of the door is detected by a switch means (not shown) or the like, as shown in FIG.
The motor 52 operates and the cam lever 53 rotates via the speed reduction mechanism 51. By this rotation of the cam lever 53, the cam shaft 53a abuts and presses the side wall 41cb of the elongated hole 41c of the active lever 41, and the active lever 41 linearly moves from the initial position shown by the solid line in FIG. 6 to the right direction in FIG. This linear movement operation of the active lever 41 is transmitted to the passive lever 42 via the cancel lever 44 because the pressing wall 44a of the cancel lever 44 is pressed by the protruding shaft 41d of the active lever 41, whereby the linear movement operation is transmitted. The passive lever 42 is also a torsion spring 43.
6 is moved linearly from the initial position shown by the solid line in FIG. 6 to the right direction shown in FIG.

The linear movement of the active lever 41 and the passive lever 42 is performed by the elongated holes 41a, 41b, 42.
As it will be performed while being guided by a and 42b,
At the initial stage of this operation, the active lever 41 and the passive lever 42 move the inclined portion 4 of the elongated holes 41a, 42a.
By 1ab and 42ab, the support shaft 31b can be rotated. That is, the active lever 4
1 and the passive lever 42 are inclined portions 41 from the initial position.
After being guided by ab and 42ab and moving linearly downward in FIG. 6, it is guided by horizontal portions 41aa and 42aa and moving horizontally straight in FIG. Reach the operating position. As a result, the passive lever 4
The second engaging portion 42d linearly moves to the right in FIG. 6 while being moved on the rotation locus of the latch lever 27, engages with the latch lever 27, and the latch lever 27 is dragged and rotated. As a result, the latch 23 also rotates in the same manner as the latch lever 27 to enter the full-latch state shown by the solid line in FIG. 2, the striker 24 is pulled in, and the door is fully closed. When the latch lever 27 is dragged by the engaging portion 42d, the displacement generated in the engaging portion between the latch lever 27 and the engaging portion 42d is shown in FIG. 8 because the engaging portion 42d moves linearly. As shown, there is only one misalignment in the direction A caused by the rotation of the latch lever 27.
As a result, the torque loss transmitted from the engagement portion 43d to the latch lever 27 at the engagement portion between the engagement portion 43d and the latch lever 27 is reduced, and the torque transmission from the engagement portion 43d to the latch lever 27 is efficiently performed. Be seen. As a result, it is possible to linearly move the passive lever 42 with a small output of the motor 52 to surely rotate the latch 23, that is, to improve the operation efficiency, whereby the motor 52 is downsized.

After the latch 23 is in the full latch state,
The cam lever 53 continues to rotate by the operation of the motor 52, and the cam shaft 53a abuts and presses the side wall 41ca of the elongated hole 41c. As a result, the active lever 41 linearly moves from the operating position to the initial position and returns to the initial position, and the passive lever 42 also linearly moves from the operating position to the initial position by the biasing force of the torsion spring 43. Return to position. The engagement portion 42d is retracted from the turning locus of the latch lever 27 in the same manner as when the state shown in FIG. 1 is changed to the state shown in FIG. 5, and the inside handle or outside handle thereafter is operated to open the door. Rotation of the latch 23 in the open state causes the latch lever 27 and the engaging portion 42 to rotate.
It will not be hindered by interference with d. The motor 52 operates for a predetermined time and automatically stops after it is detected that the latch 23 is in the full-latch state shown by the solid line in FIG.

When the door 2 is changed from the open state to the fully closed state, the door does not stop in the half closed state, and if the door remains in the fully closed state, the half closed state of the door is not detected, and the closing mechanism is closed. 4 does not work.

As described above, the engaging portion 43d of the passive lever 42 is retracted from the rotation locus of the latch lever 27 in the initial state, and the inclined portion of the elongated hole 42a is in the initial stage of the linear movement operation of the passive lever 42. Four
2ab moves on the rotation locus of the latch lever. As a result, the rotational movement of the latch lever 27 is not hindered by the engaging portion 43d, and the stroke B between the engaging portion 43d and the latch lever 27 is reduced as shown in FIG. 8 in the state shown in FIG. The size can be reduced, that is, the engaging portion 43d and the latch lever 27 can be brought close to each other. As a result, the passive lever 42 can be reduced in size, the passive lever 42 can be linearly moved with a small output of the motor 52, and the latch 23 can be reliably rotated, that is, the operating efficiency can be improved.
As a result, the motor 52 is downsized.

As shown in FIG. 7, when the occupant's finger, clothes, or the like is sandwiched between the door and the vehicle body, the passive lever 42 linearly moves to move the latch 3 from the half-latched state to the full-latched state. When the inside handle or the outside handle is operated to rotate the cancel lever 44 in the clockwise direction as shown in FIG. 41d and the cancel lever 4
The engagement between the pressing wall 44a and the restriction wall 44b of No. 4 is released, and the lock state is established. As a result, the linear movement operation of the active lever 41 is not transmitted to the passive lever 43, and only the active lever 41 is in the idle driving state in which the linear movement operation is performed in the right direction in FIG. 7 (to the operating position indicated by the chain double-dashed line in FIG. 7). . As a result, the linear movement operation of the passive lever 43 is stopped midway and the rotation operation of the latch 3 is stopped. That is, the operation of the closing mechanism 4 from the half-closed state to the fully-closed state of the door is stopped. At this time, the passive lever 41 is returned to the initial position by the torsion spring 45, and the latch 23 has the open lever which is the pole 22.
Also, since the latch 23 and the pole 22 are disengaged from each other, the state returns to the unlatched state.

[0027]

According to the present invention, since the latch lever is rotated by linearly moving the latch lever and engaging the latch member, the shift of the latch member caused by the rotation of the latch member is caused by the shift of the engaging portion between the latch lever and the latch member. It can only be a deviation in one direction that occurs. As a result, the loss of the torque transmitted from the passive lever to the latch member at the engaging portion is reduced, and the torque transmission from the passive lever to the latch member can be performed more efficiently than in the conventional case. As a result, the operating efficiency is improved and the drive mechanism can be downsized as compared with the conventional one.

Also, the passive lever is retracted from the turning locus of the latch member in the initial state before the linear movement operation of the passive lever by the inclined portion of the elongated hole, and the latch lever of the latch member is moved at the initial stage of the linear movement operation of the passive lever. It moves on the turning locus.

Thus, the passive lever is prevented from interfering with the independent pivotal movement of the latch member not by the passive lever, and the latch member and the passive lever can be brought close to each other at the initial stage of the movement operation of the passive lever. As a result, the passive lever can be made smaller, the operating efficiency can be further improved, and the drive mechanism can be made smaller than ever before.

[Brief description of drawings]

FIG. 1 is a perspective view of a door closing device according to the present invention.

FIG. 2 is a plan view of a door locking mechanism.

FIG. 3 is an exploded perspective view of a closing mechanism.

FIG. 4 is a cross-sectional view of the closure mechanism.

FIG. 5 is a perspective view corresponding to FIG. 1 when the door locking mechanism is operated up to a half-latched state.

FIG. 6 is an operation explanatory view of the door closing device according to the present invention.

FIG. 7 is an operation explanatory view of the door closing device according to the present invention.

FIG. 8 is an enlarged perspective view showing an engaging portion between a passive lever and a latch member.

[Explanation of symbols]

 2 Door locking mechanism 4 Closing mechanism 5 Drive mechanism 23 Latch (latch member) 27 Latch lever (latch member) 42 Passive lever 42a Oblong hole 42ab Inclined part

Claims (2)

[Claims] 1. A structure such as a vehicle body, a door rotatably arranged in the structure, a rotatably arranged one of the structure and the door, and the structure according to a rotation operation. One of the structure and the door, and a door locking mechanism having a latch member that engages with a locked member disposed on the other side of the structure and the door to hold the door in a closed state with respect to the structure. A closing mechanism having a passive lever that is linearly movable freely and that engages with the latch member by a linear movement motion to rotate the latch member; and the passive lever disposed on the structure and the door. A door closing device having a drive mechanism for linear movement. 2. The push lever is retracted from the turning locus of the latch member in the initial state formed on the push lever before the push lever moves linearly, and the push lever is moved at the initial stage of the push lever linear movement. 2. The door closing device according to claim 1, further comprising an elongated hole having an inclined portion for moving the latch member on a rotation locus.