JPH09254688A - Double lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a double lock device to be assembled without requiring adjustments even if there is a difference in pitch between strikers and notches engaged with the strikers. SOLUTION: First and second notches N1, N2, formed in either of first and second members 10, 13 that can move toward and away from each other, are simultaneously engaged with first and second strikers 11a, 11b secured at an interval to the other member, and the strikers inserted into the depths of the notches are engaged, in such a way that they can be disengaged simultaneously, by first and second lock mechanisms 20, 30 provided at the other member. The first notch and the first lock mechanism restrain the first striker from moving in all the directions perpendicular to the longitudinal direction of the first striker, while the second notch and the second lock mechanism permit the second striker to move only in a direction connecting the strikers together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double lock device for releasably engaging two members such as a seat leg of a folding or detachable vehicle seat and a vehicle body floor at two locations.

[0002]

2. Description of the Related Art As a double lock device of this type, for example, there is a technique disclosed in Japanese Patent Laid-Open No. 63-137054. This is a detachable vehicle seat, in which the front and rear strikers fixed to the vehicle body floor are inserted into the notches formed on the front and rear of the left and right seat legs, and the striker locks the front and rear strikes so that each striker It is locked at the same time so as not to come out of the notch.

[0003]

In the double lock device described above, both front and rear strikers are completely restrained in the front, rear, upper and lower directions with respect to the seat leg when locking. Therefore, if there is a difference between the pitch between the notches of the seat leg and the pitch between the strikers due to a manufacturing error of the seat leg or a mounting error of the striker, the vehicle seat cannot be attached properly. Therefore, it is troublesome that the mounting position of the striker must be adjusted during assembly. An object of the present invention is to solve each of these problems.

[0004]

SUMMARY OF THE INVENTION A double lock device according to the present invention is a first and a second member which are fixed to one of the first and second members which can approach and separate from each other at a distance.
The first notch and the second notch formed in the other member can be engaged with the striker at the same time, and the striker inserted in the inner part of each notch is provided with the first and second locking mechanisms provided in the other member. The present invention relates to a double lock device that is detachably engaged at the same time. The first notch has a narrow width and restrains the movement of the first striker inserted in the inner part thereof in the direction connecting the two strikers and the first lock. The engagement of the first hook of the mechanism restricts the relative movement of the first striker with respect to the other member in all directions orthogonal to the longitudinal direction thereof, and the second notch is wide and the second notch inserted in the inner part thereof. By engaging the second hook of the second lock mechanism with the striker, the movement of the second striker with respect to the other member is allowed only in the direction connecting both strikers. And it is characterized in and.

The first striker is constrained against the second member in all directions orthogonal to the first striker in the state of being engaged by the corresponding lock mechanism at the inner part of the corresponding notch, while the second striker is Only movement in the direction connecting both strikers is permitted with respect to the second member. Therefore, even if there is a difference between the pitch between the notches of the seat leg and the pitch between the strikers, the difference is absorbed by the movement of the second striker in the direction connecting the strikers.

The double lock device according to the present invention preferably includes an interlocking member that operates the first and second lock mechanisms in conjunction with each other to simultaneously disengage the respective hooks from the corresponding strikers. In this way, both lock mechanisms can be released simultaneously by one operation.

Further, the first hook is elastically biased in a direction in which the engagement with the first striker is released, and
And a cam surface that abuts when the striker is inserted into the first notch and swings the first hook in a direction against the elastic bias to bring it into a position to engage with the first striker. The 1-lock mechanism is elastically urged in a direction in which the claw portion formed on the other member so as to be swingable and formed in a part thereof is in contact with a part of the outer peripheral surface of the first hook. The ratchet and the operating lever connected to the ratchet are further provided, and when the first hook is in a position where it engages with the first striker, the pawl portion of the ratchet is formed on a part of the outer peripheral surface of the first hook. By the elastic biasing by engaging with the locking recess
The second hook of the second lock mechanism is elastically urged in a direction to engage the hooking portion at the tip with the second striker, and the second hook of the second locking mechanism is moved to the outside of the hooking portion. Defines an inclined cam surface that swings the second hook in a direction against the elastic bias by contact with the second striker, and the interlocking member connects the operation lever and the second hook and operates the operation lever. It is preferable to allow the swinging of the second hook in the direction against the elastic bias of the second hook regardless of the operation of the lever. With this configuration, each striker can be engaged with each locking mechanism only by bringing the first and second members close to each other and bringing them into the engagement position without operating the operation lever.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the accompanying drawings. As shown in FIG. 7, the double lock device of this embodiment is provided between the inner leg 13 of the folding vehicle seat and the floor portion of the vehicle body 10. The outer hinge 12b in which the seat back 15 that can be tilted forward is fixed to the end portion of the seat cushion 12 provided on the rear side near the outside of the vehicle body is a body (first member) 1
The seat cushion 12 is attached to the inside of the side portion of the body 10 so as to be flipped up. Seat cushion 12
An inner leg (second member) 13 is provided on the side of the bottom plate 12a opposite to the hinge bracket 14 so as to be capable of undulating around a longitudinal axis, and first and second notches N1 and N2 provided at the front and rear portions of the lower edge thereof. First and second locking mechanisms 20 and 30 to be described later are provided on the back side of the.

As shown in FIG. 7 (a), when the folding type seat is opened for use, the inner legs 13 are fixed to the floor of the body 10 in parallel with each other with the front and rear spaced apart. 11a, 11b as the first and second
It is inserted into the notches N1 and N2 and locked by the first and second locking mechanisms 20 and 30. To fold this seat, first, as shown in Fig. 7 (b), the seat back 1
The lock of No. 5 is released by the reclining lever 15a, the seat cushion 12 is tilted down, and the locks of the first and second lock mechanisms 20 and 30 are released by lifting the operation knob 27a upward, as shown in FIG. 7 (c). As shown, the entire seat is flipped up to the inside of the side portion of the body 10, and the seat cushion 12 is connected to and retained by the assist grip 17 by the fixing band 16 attached to the lower portion of the seat cushion. The inner leg 13 is folded and stored in a recess 12c formed in the bottom plate 12a.

FIG. 1 shows the first and second locking mechanisms 20 and 3.
The figure which looked at the inner leg 13 to which 0 was attached from the back side is shown. The inner leg 13 is a sheet metal member whose entire outer periphery is bent to the back side. The front and rear parts of the lower edge of the inner leg 13 slightly project downward, and the rear downward projecting part has a first locking mechanism 2 to be described later.
A rear notch 13a that forms a narrow first notch N1 together with the notch 21d of the frame 21 of 0 is formed, and the front lower protruding portion is wide with the notch 31a of the frame 31 of the second locking mechanism 30 described later. Second notch N2
Forming a front notch 13b. Both upper sides of the inner leg 13 are openably and closably attached to a pair of brackets 12d fixed to a bottom plate 12a of the seat cushion 12 via a pair of hinge pins 18. The first and second locking mechanisms 20, 30 are provided on the flange at the center of the lower edge of the inner leg 13, and the first and second strikers 11 are provided.
The body 10 is in use when locked to a and 11b.
The rubber feet 19 that come into contact with the floor are attached.

Next, the first lock mechanism 20 will be described with reference to FIGS. 2, 3 and 5. The frame 21 of the first lock mechanism 20 is formed by integrally connecting a metal plate lock base plate 21a and a lock cover plate 21b, which are opposed to each other with a space therebetween, at two upper portions which are mounting portions to the inner legs 13. . The upper portions of both plates 21a, 21b are fixed to the inner leg 13 by two mounting bolts 29, and the lower portion has a notch 21d having a shape substantially corresponding to the main part of the rear notch 13a when viewed from the direction orthogonal to the inner leg 13. Are formed. Both plates 21
The first hook 22 provided on one side (left side in FIGS. 2 and 3) of the notch 21d between a and 21b is swingably supported by a pivot pin 23 having both ends crimped to the plates 21a and 21b. Has been done. On the other side of the notch 21d (right side in FIG. 2 and FIG. 3), both ends of the ratchet 24 and the arm 25, which are integrally connected by the pin 25a, are formed in the oval-shaped holes.
A double-sided chamfer of the operation shaft 26, which is rotatably supported by 21b, is inserted without a gap, and is rotatably retained by a washer 26a which is caulked and fixed to one end thereof. An operating lever 27 having a knob 27a at its tip is fixed to the other end of the operating shaft 26 by caulking, and the ratchet 2
4, the arm 25, and the operation lever 27 swing integrally.
A pin 27b parallel to the operation shaft 26 is caulked and fixed to a part of the operation lever 27 above the operation shaft 26.

On the first hook 22, the first striker 11 is swung in the counterclockwise direction about the pivot pin 23.
a hooking portion 22a that engages with a is formed.
The cam surface 22c is provided on the outer peripheral surface of the first hook 22 that faces a.
Is formed, and a locking recess 22b is formed on the outer peripheral surface following the cam surface 22c. The ratchet 24 and the arm 25 are formed with a claw portion 24a engageable with the locking recess 22b by swinging in the counterclockwise direction about the operation shaft 26. Between the first hook 22 and the arm 25,
Both ends of a tension spring 28 that urges the locking recess 22b and the claw 24a in a direction to engage each other are locked.
In the locked state shown in FIG. 2, the first lock mechanism 20 is
The hooking portion 22a of the first hook 22 is the first striker 11.
Since the pawl portion 24a of the ratchet 24 is engaged with the engaging recess 22b at the same time as engaging with the a, the swinging of the first hook 22 in the clockwise direction by the spring 28 is prevented.

Next, referring to FIGS. 4 and 6, the second lock mechanism 3
0 will be explained. The frame 31 of the second locking mechanism 30 is made of sheet metal, and is fixed to the inner leg 13 by the mounting bolts 36 at the upper two places, and the inner leg 13 is provided at the lower part.
A notch 31a having a shape substantially corresponding to the front notch 13b when viewed from a direction orthogonal to is formed. Notch 3
1a is a wide shape in which a large arc-shaped edge (a substantially horizontal straight line is substantially acceptable) around the support shaft 32 is formed in the inner part. The central portion of the second hook 33 is swingably supported by the small diameter portion 32a of the tip end of the support shaft 32 that is fixed to the frame 31 by caulking and rises from the frame 31, and the washer 32b is caulked at the tip of the support shaft 32. It is locked out.

At the lower end of the second hook 33, a hooking portion 33a which engages with the second striker 11b by swinging in the counterclockwise direction about the support shaft 32 in FIG. 4 is formed, and the upper end 33b. A pin 35 is caulked and fixed in parallel with the support shaft 32. The second hook 33 has a support shaft 32.
It is wound in a counterclockwise direction by a torsion spring 34 whose both ends are locked by the frame 31 and the second hook 33, and in the free state, it comes into contact with a stopper 31b integrally formed upright from the frame 31. Have been stopped. In this stopped state, the hooking portion 33a of the second hook 33 is substantially parallel to the circular arc-shaped edge portion at the back of the notch 31a, and the gap with this edge portion is slightly larger than the diameter of the second striker 11b. If the second striker 11b that is being inserted into the notch 31a comes into contact with the outer surface of the second hook 33, the second hook 33 swings clockwise against the spring 34. 33c is formed.

As shown mainly in FIG. 1, the first locking mechanism 20 and the second locking mechanism 30 are connected by a link (interlocking member) 38 so as to interlock with each other to release the engagement. The rear end of the link 38 is fitted to the pin 27b of the operation lever 27 so as to be rotatable only, and is retained by the retainer ring 27c, and the second hook is provided in the long hole 38a formed along the longitudinal direction at the front end of the link 38. The pin 35 of the upper end portion 33b of 33 is inserted so as to be rotatable and slidable in the direction of the elongated hole 38a, and is retained by the retainer ring 35a.

As shown in FIG. 1, when the first hook 22 of the first lock mechanism 20 is in the locking position (see FIG. 2 for details), the second hook 33 of the second lock mechanism 30 also contacts the stopper 31b. The pin 35 of the second hook 33 is located near the rear end in the elongated hole 38a at the front end of the link 38, at the contact position (see the solid line in FIG. 4). In this state, the hook portion 22a of the first hook 22 has the first striker 11a.
At the same time when the claw 24a is engaged with the engaging recess 22b, the spring 28 prevents the first hook 22 from swinging in the clockwise direction. First striker 11
Since the movement of the a in the front-rear direction is restricted by the narrow first notch N1 including the rear notch 13a of the inner leg 13 and the notch 21d of the frame 21, the downward separation is blocked by the hook portion 22a. Relative movement with respect to the inner leg 13 is restricted in all directions orthogonal to the longitudinal direction.

In this state, the hook portion 33a of the second hook 33 has a front notch 13b of the inner leg 13.
Also, the wide second notch N2 formed by the notch 31a of the frame 31 is almost completely closed, and the space formed between the second notches N2 for confining the second striker 11b is horizontally long (see FIG. 4), and the hooking portion 33a is a spring. It is also possible to move backwards against 34. Therefore, the second striker 11b is constrained with respect to the inner leg 13 in the vertical direction, but can move within the range allowed by the width of the second notch N2 in the front-rear direction in the direction connecting the strikers 11a and 11b. If there is no error, the second striker 11b is located at the position indicated by the chain double-dashed line 11A in FIG. 4, but if there is an error, it can move within the range of the positions indicated by the chain double-dashed line 11B and the chain double-dashed line 11C. That is, even if the second striker 11b is moved to the position of the alternate long and two short dashes line 11B, the second striker 11b is in the space between the second notch N2 and the hook portion 33a, so that the second lock mechanism 30 can engage with the second striker 11b. Further, when the hooking portion 33a of the second hook 33 is moved to the position of the chain double-dashed line 11C, the hooking portion 33a of the second hook 33 is within the range allowed by the long hole 38a at the front end of the link 38 regardless of the operation of the operating lever 27. Since it can move rearward against 34, engagement by the second locking mechanism 30 is possible.

Therefore, the pitch between the notches 13a and 13b at the front and rear of the inner leg 13 and both strikers 11a and 1b.
Even if there is a difference between the pitch between 1b, the difference is the second
The second striker 11b locked in the second notch N2 by the hook portion 33a of the hook 33 is absorbed by being movable between the two-dot chain line 11B and the two-dot chain line 11C. The step of adjusting the mounting positions of the strikers 11a and 11b becomes unnecessary, and the number of assembling steps can be reduced. In the state where the first striker 11a is locked in the first notch N1 by the first hook 22,
Since the inner legs 13 are constrained in all the directions orthogonal thereto, there is no relative movement between the two members when the inner legs 13 are engaged with the body 10.

From the locked state of both the lock mechanisms 20 and 30, if the knob 27a is held by hand and the operation lever 27 is swung in the direction of arrow A (see FIG. 2) against the spring 28, The ratchet 24 and the arm 25 of the first lock mechanism 20 also swing in the clockwise direction to disengage the pawl portion 24a from the locking recess 22b. As a result, as shown in FIG. 3, the first hook 22 swings clockwise by the spring 28 to disengage the hooking portion 22a from the first striker 11a, and the back portion of the first hook 22 is locked to the lock base plate 21a. The unlocked state is brought into contact with the stopper 21c formed in the above and is stopped. In this state, the first
The striker 11a is pushed out from the inner part of the first notch N1 by the cam surface 22c of the first hook 22 and can be detached downward. Further, the swing of the operation lever 27 described above is
The second hook 3 of the second lock mechanism 30 via the link 38.
3 is swung to the position of the alternate long and two short dashes line 33A in FIG. 4, whereby the second striker 11b can also be detached downward from the second notch N2. That is, the first and second strikers 11 a and 11 b are released in cooperation with the corresponding first and second lock mechanisms 20 and 30 by operating the operation lever 27.

In the released state in which the second hook 33 has swung to the position indicated by the chain double-dashed line 33A in FIG. 4, the ratchet 24, the arm 25 and the operating lever 27 have swung clockwise relative to the position shown in FIG. Although it is in the position, if the user releases his / her hand from the operation lever 27 there, the first hook 22 remains in the lock disengaged state in which the back portion of the first hook 22 comes into contact with the stopper 21c and is stopped. Is returned to the position shown in FIG. 3 by the spring 28, and the second hook 33 is also returned to the position shown by the chain double-dashed line 33B in which the hooking portion 33a hangs about half on the second notch N2.

In this state, the inner leg 13 is attached to the body 1
When the first striker 11a comes into contact with the cam surface 22c of the first hook 22 and pushes the weight of the seat or the seat downward, the first striker 11 is moved against the spring 28 by moving the first hook 22 against the floor. It is swung in the clockwise direction, that is, in the direction in which the hook portion 22a is engaged with the first striker 11a. And the first striker 11a is the first notch N1.
When the first hook 22 is completely engaged with the first striker 11a, the pawl portion 24a of the ratchet 24, which is biased to the outer periphery of the first hook 22 by the spring 28, becomes the locking recess 22b. Engage, ratchet 24,
The arm 25 and the operating lever 27 swing in the counterclockwise direction, and the first lock mechanism 20 shown in FIG. In parallel with the above operation, the second striker 11b abuts on the inclined cam surface 33c on the outer side of the hook portion 33a at the position of the alternate long and two short dashes line 33B, and the second hook 33 is rotated clockwise against the spring 34. And swings into the second notch N2. Then, the second striker 11b has the second notch N2.
Just before reaching the innermost part of the
7 returns to the position shown in FIG. 2, so that the second hook 33 is also shown in FIG.
Is in the locked state shown by the solid line. That is, if the inner leg 13 is brought close to the floor of the body 10, the first and second strikers 11a, 11a,
11b is inserted into the first and second notches N1 and N2 and locked by the first and second locking mechanisms 20 and 30.

[0022]

As described above, according to the present invention, even if there is a difference in the pitch between the notches of the seat leg and the pitch between the two strikers, the difference is that the second notch causes the second notch. Since it is absorbed by the movement of the second striker locked inside, the step of adjusting the mounting position of the striker at the time of assembly becomes unnecessary, and the number of assembly steps can be reduced. Further, when the first striker is locked in the first notch by the first lock mechanism, the first striker is restrained with respect to the second member in all directions orthogonal to the first striker, so that the two members are engaged with each other. , There is no relative movement between the two members.

According to the structure in which both the lock mechanisms are disengaged at the same time by interlocking with each other, the both lock mechanisms can be simultaneously released by one operation, so that the lock operation becomes easy.

Further, the first lock mechanism locks the first hook elastically biased in the direction in which the engagement with the first striker is disengaged, and the position where the first hook is engaged with the first striker. The second hook of the second lock mechanism is elastically urged in a direction to engage the hook portion with the second striker and abuts against the second striker. Form an inclined cam surface for swinging the second hook in a direction that resists elastic biasing, and the interlocking member connects the operation lever and the second hook, and is independent of the operation of the operation lever. If the rocking in a direction that resists the elastic bias of (1) is allowed, both locking mechanisms can be engaged without operating the operating lever, so that the locking operation becomes easier.

[Brief description of drawings]

FIG. 1 is an overall front view of an embodiment of a double lock device according to the present invention.

2 is a front cross-sectional view (cross-sectional view taken along line 2-2 of FIG. 5) of the first lock mechanism of the embodiment shown in FIG. 1 in a locked state.

3 is a front cross-sectional view (cross-sectional view taken along line 2-2 of FIG. 5) of the double lock device shown in FIG. 1 in a disengaged state of the first lock mechanism.

FIG. 4 is a front view of a second lock mechanism of the double lock device shown in FIG.

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

FIG. 6 is a left side view of FIG. 4 with a part thereof cut away.

FIG. 7 is an explanatory view of a foldable seat including the double lock device shown in FIG. 1.

[Explanation of symbols]

10 ... 1st member (body), 11a ... 1st striker,
11b ... 2nd striker, 13 ... 2nd member (inner leg), 20 ... 1st locking mechanism, 22 ... 1st hook, 22
a ... Hooking portion, 22b ... Locking concave portion, 22c ... Cam surface, 2
4 ... Ratchet, 24a ... Claw, 27 ... Operating lever, 3
0 ... 2nd lock mechanism, 33 ... 2nd hook, 33a ... Hooking part, 33c ... Inclined cam surface, 38 ... Interlocking member (link), N1 ... 1st notch, N2 ... 2nd notch.

Claims (3)

[Claims] 1. A first striker and a second striker fixed substantially parallel to each other at a distance from either one of a first member and a second member that can approach and separate from each other, and provided on the other of the both members. A first notch and a second notch, which are respectively engageable with the first and second strikers at the same time, and the first notch which is swingably provided on the other member and is inserted into the inner part of the first notch. A first lock mechanism having a first hook that detachably engages with a striker, and a second striker that is swingably provided on the other member and that is inserted into a deep portion inside the second notch and is detachable. In a double lock device comprising a second lock mechanism having a second hook that engages with, the first notch has a narrow width and restrains movement of the first striker inserted in the inner part thereof in a direction connecting both strikers. The second knock Is wide and allows movement of the second striker inserted in the inner part of the second striker in a direction connecting both strikers, and the first hook engages with the first striker inserted in the inner part of the first notch. This restrains the first striker from moving relative to the other member in all directions orthogonal to the longitudinal direction thereof, and the second hook is inserted into the inner part of the second notch. A double lock device, characterized in that by engaging with the second striker, the second striker is allowed to move relative to the other member only in a direction connecting both strikers. 2. The interlocking member for operating the first and second locking mechanisms in conjunction with each other to simultaneously disengage the respective hooks from the respective strikers corresponding thereto. Double lock device. 3. The first hook is elastically biased in a direction in which a hooking portion of the first hook is disengaged from the engagement with the first striker, and the first striker is placed in the first notch. A cam surface that abuts when inserted and swings the first hook in a direction that opposes the elastic bias, and has a position where the hook portion engages with the first striker; The 1-lock mechanism is elastically urged in such a direction that the claw portion formed on the other member so as to be swingable and formed in a part thereof is in contact with a part of the outer peripheral surface of the first hook. The ratchet and the operating lever connected to the ratchet, the hook portion of the first hook is in a position where it engages with the first striker, and the claw portion is the first hook. By engaging the locking recess formed on a part of the outer peripheral surface of the One hook is designed to prevent the hook from returning, and the second hook is elastically biased in such a direction that the hook portion at the tip of the second hook engages with the second striker. An inclined cam surface that swings the second hook in a direction against the elastic bias by contact with the second striker is formed, and the interlocking member connects the operation lever and the second hook, The double lock device according to claim 2, wherein swinging of the second hook in a direction against the elastic bias is allowed regardless of the operation of the operation lever.