JPH0730430Y2 - Link type leg rest - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a link type leg rest that is used by being installed in a front portion of a seat in various seats of an aircraft or a vehicle.

[Conventional technology]

Conventionally, as shown in FIG. 10, a slide type guide 54 having an arc-shaped guide long groove 53 is attached to a lower portion of a front beam 52 formed in a seat bottom frame 51 of a seat, and the guide long groove 53 of the guide 54 is attached to the guide long groove 53. , The tip of the supporting arm 56 extending from the lower surface of the leg rest 55 is attached to the front beam.
A driving machine 57, such as a hydraulic cylinder, is provided which is engaged and supported so as to be rotatable in the vertical direction with respect to 52, and which pushes or pulls the supporting arm 56 from the rear side thereof. There has been proposed a leg rest using a slide guide configured to support the leg rest 55 in an inclined use position or a substantially horizontal use position by an operation. According to the leg rest, when not in use, the leg rest 55 is hung below the front beam 52 of the seat, and if desired, the passenger operates the operating unit (not shown) to operate the driving machine 57. Thus, the leg rest 55 can be flipped up to the inclined use position or the horizontal use position with respect to the seat bottom 58 for use.

Further, as shown in FIG. 11, at the front end of the leg rest 61, a plate-shaped footrest 62 is connected to the front end portion of the legrest by arms 63, 63 that support the rear end of the legrest 61. On the other hand, there is also proposed a structure which can be deployed forwardly. In such a footrest 62, generally, a stopper 64 for preventing over-rotation of the footrest 62 and restricting an inclination angle of the footrest 62 is made to project laterally from one side surface or both side surfaces of the legrest 61, and the arms 63, 63 are provided on the stoppers 64. It has a structure in which the edge 63a of the above is abutted.

[Problems to be solved by the device]

However, in the leg rest device using the conventional slide type guide, the slide type guide 54 having the arc-shaped guide long groove 53 is an action in which the guide long groove 53 rotates about the temporary void point. A bearing or the like formed at the tip of the supporting arm 56 meshes with the inner edge of the guide long groove 53 and does not rotate smoothly, and the rotation operation becomes heavy due to the frictional resistance,
There was a problem that there was play during storage.

In addition, the footrest configured as the above legrest has a constant inclination angle when deployed and used, and the footrest 62 corresponding to the difference in physique like adults and children and the flip-up angle of the legrest 61 can be freely used. There was a problem that it was not possible to set a different inclination angle.

The present invention has been made in view of the above problems, and allows the legrest to be easily and smoothly flipped up,
It is also an object of the present invention to provide a link type leg rest in which the use deployment angle of the footrest can be freely set.

[Means for Solving the Problems]

In order to achieve the above object, the link type leg rest according to the present invention comprises a plurality of fixed links L1, L1 on the upper part of the front leg of the seat.
The fixed end of ... is pivotally mounted such that its free end is rotatable forward of the seat, and at a proper position between the fixed links L1, L1 ... from the pivotal position of the fixed links L1, L1. At a slightly lower position or substantially the same position, the fixed end of the rotary link L2 is pivotally mounted so that its free end can rotate forward of the seat,
The free ends of the fixed links L1, L1 ... Are pivotally attached to the corresponding brackets formed on the rear surface of the leg rest, and the fixed links are attached.
The engaging shafts of the brackets formed above the pivotal positions of L1, L1 ... are engaged and mounted so as to slide in the long grooves formed at the free ends of the rotating links L2, and the rotating links L2 By pressing or pulling the rear end of the
1, L1 ... and the rotation link L2 are each rotated in an arc shape around each pivotal attachment part, and the fixed links L1, L1 ... The leg rest is provided so as to be rotatable in a use position in the front upper part of the seat and a storage position in the lower part of the seat.

In addition, a pair of arms supporting both sides of the footrest are connected to the front end of the legrest, and the footrest configured on the arms is configured to be deployable forward of the legrest and stopped at a predetermined use position. It is also possible to configure a use inclination angle restricting means for the footrest that can be used.

Further, the use inclination angle restricting means of the footrest comprises a cam formed on the footrest side and a ratchet formed on the legrest side, and the cam has a plurality of stop claws formed on the outer peripheral edge thereof at predetermined intervals. And projecting to the outer peripheral direction beyond the projecting length of the stop pawl, engaging with the engagement pin of the ratchet in response to the movement of the footrest in the use position direction or the storage position direction, and engaging the engagement end with the cam stop pawl. And an actuating pawl that separates the engaging end from the stop pawl of the cam, and the ratchet has the engaging end of the cam with the pivoting axis extension line direction as the top dead center. It is possible to use a member configured to always be pulled by an elastic member in the engaging direction with the stop claw or the separating direction.

[Action]

According to the above configuration, when the rear end portion of the rotation link L2 is pressed slightly below the pivotally attached portion from behind, the rotation link L2 moves forward in the seat with the pivotal attachment portion at the upper end of the front leg as the center. It rotates and flips up the leg rest formed at its tip, and at the same time, the floating ends of the fixed links L1.L1 ... rotate around its pivotal part and support the leg rest in a predetermined position. To do. That is, the turning radius of the fixed links L1.L1 ... Is longer than the turning radius of the turning link L2, and the floating ends of both are arranged at the front and rear positions at the lower end of the leg rest, so that the front end of the leg rest is While moving diagonally upward and forward of the front leg in an arc shape, the leg rest is flipped up to a predetermined angle, and the fixed ends of the fixed links L1, L1 ... The posture of use can be reliably retained. Further, since the structure for pressing the leg rest by the drive unit at the center position on the rear end of the back surface of the leg rest does not cause a so-called one-sided effect during operation, it is possible to smoothly flip up the leg rest. is there.

In addition, the footrest folded and superposed on the leg rest can be deployed in front of the leg rest so that the leg rest and the footrest can be used integrally. That is, when the footrest is expanded in the use position direction, the cam formed on the footrest side rotates and the stop claw is hooked on the engagement pin of the ratchet, and the engagement end of the ratchet is gradually engaged with the stop claw of the cam. The footrest can be held at a desired deployment use angle, and when the footrest is rotated in the retracted position direction, the cam rotates to bring the outer peripheral edge of the stop pawl into contact with the engaging pin of the ratchet, thereby By pushing the ratchet in the protruding direction and separating it from the cam, the footrest can be stored in the legrest in an overlapping manner.

〔Example〕

An embodiment of a link type leg rest according to the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment in which the link type leg rest according to the present invention is mounted on a vehicle seat.
Is a front leg that supports the seat bottom frame 2, and 3 is a rear leg. A front beam 4 forming a seat bottom frame 2 is attached to an upper end portion of the front leg 1, and a rear beam 5 is attached to an upper end of the rear leg 3, and a seat bottom 6 is placed on the upper portion of the front beam 4 and a seat back. 7 stands up to form a seat.

A plurality of brackets 8,8 ... (four in this embodiment) are erected on the front beam 4 so as to project downward and forward of the seat, and each bracket 8,8 ... Has an L-shaped fixed link L1 ,. A fixed end of L1 ... is pivotally attached so that its free end can be rotated forward of the seat, and a L-shaped rotary link L2 is also attached to a bracket 9 which is erected at substantially the center of the front beam 4. A fixed end portion of which is pivotally mounted so that its floating end portion is rotatable forward of the seat, and legrests 10 are supported on the floating end sides of the fixed links L1, L1 ... And the rotary link L2. It is a thing. That is, the pivotal positions of the fixed links L1, L1 ...
Each of the brackets is formed on the back surface of the legless 10 so as to be located slightly higher than the pivotally attached position of 2, and to be located in front of the floating end side mounting portion of the fixed links L1, L1 ... Engage 11, 12, 12 ... Reference numerals 13 and 13 are reinforcing rods horizontally installed on the two fixed links L1 and L1. In addition,
In order to smoothly respond to the turning motion of the turning link L2, a long groove 14 is formed on the floating end side of the turning link L2.
An engaging shaft 15 projecting from the bracket 12 side is slidable inside the bracket 14. The pivoting portion 9a (supporting point) of the bracket 9 pivotally attaching the fixed end of the rotary link L2 is located slightly below the pivoting position of the fixing links L1, L1 ... The pivotal positions of the links L1, L1 ... And the pivotal positions of the rotary links L2 may be formed at substantially the same position.

Thus, in order to perform an arcuate operation around the pivotal portions 8a and 9a of the fixed link L1 and the rotary link L2, respectively, the rotary link L2 is located slightly below and rearward of the fixed end of the rotary link L2. That is, the pushing rod 18 of the driving machine 17 such as a hydraulic cylinder attached to the bracket 16 formed on the rear beam 5 side is connected to the L-shaped corner portion of the turning link L2, and the pushing rod 18 turns. The link L2 is configured to be pressed or pulled in the front-rear direction. Therefore, as shown in FIG. 3, the rotation link L2
The fixed end of the legrest 10 pivots forward around the pivotal portion 8a of the front beam 4, and the leg rest 10 attached to the free end thereof.
Is flipped upward, and the floating end of the fixed link L1 also follows this, and pivots in a direction to support the leg rest 10 around the fixed end pivotally connecting part 9a. Fixed link above
The turning radius of L1 is longer than the turning radius of the turning link L2, and the front end portion of the leg rest 10 can be lifted in an arc shape to the diagonally upper front of the front leg 1 to support the leg rest 10 at a predetermined tilt angle. The free end of the pivoting link L2 is
The engaging shaft 15 protruding from the side of the bracket 11 formed on the rear surface is used as a guide to move in the long groove 14 of the engaging shaft 15 to absorb the rotational difference from the free end of the fixed link L1 and to move the leg rest 10 to the front leg 1.
The upper end of the legrest is smoothly rotated diagonally upward and the legrest 10 is prevented from swinging. In this embodiment, both the fixed link L1 and the rotary link L2 are formed in a substantially L shape, but if the leg rest 10 can be flipped up due to the difference in the radius of rotation, the shape is the same. Not limited to.

Further, the driving machine 17 is operated by an operation unit (not shown) equipped on a side armrest, a center armrest, or the like. Instead of the drive unit 17 such as a hydraulic cylinder, a rack or other structure can be used as long as it can be moved forward and backward by remote control, and the same operation as described above can be achieved.

The front end of the leg rest 10 is formed by connecting a footrest 19 such as a plate via arms 20 and 20 that support the rear end surface side thereof, and the footrest 19 configured in the arms 20 and 20 is connected to the legrest 10. It is configured so that it can be deployed forward. twenty one
Is a rotation axis of the arm 20. 22 this footrest
It is a stopper that prevents the excessive rotation of 19 and regulates the inclination angle of the footrest 19, and a shaft around which a rubber ring is wound is projected laterally from one side surface or both side surfaces of the leg rest 10, and the arm is attached to this. The edge 20a of 20 abuts and functions as a detent. The deployment angle of the arm 20 can be adjusted by changing the mounting position of the stopper 22 or changing the size of the diameter of the stopper 22.

FIG. 6 to FIG. 9 show the use inclination angle regulating means of the footrest, and the cam 23 constituting the footrest 19 side and the ratchet 24 constituting the legrest 10 side so as to be engaged with the cam 23 are constituted. It was done.

In the present embodiment, as shown in FIG. 6, the cam 23 has a plurality of stop claws 23a and 23b formed on the outer peripheral edge thereof at predetermined intervals and is adjacent to the stop claws 23a and 23b. Stop claws 2 are formed by forming projecting operating claws 23c and 23d.
3a and 23b engage with the engaging end 28 of the ratchet 24 as the footrest 19 rotates in the use position direction, and gradually lock the excessive rotation of the footrest 19 to engage the footrest 19 at a predetermined use angle. The operating pawls 23c and 23d
Corresponding to the operation in the use position direction or the storage position direction, the stop claws 23a and 23b of the cam 23 are separated from the engagement end 28 of the ratchet 24, or the engagement end 28 is engaged with the stop claws 23a and 23b. It operates so as to cause it. The ratchet 24 is configured such that an elastic member 25 such as a coil spring makes a swinging motion (in the directions of arrows R and L) within a predetermined angle range about a rotation shaft 26 thereof. When the ratchet 24 moves to the right side of the extension line connecting the elastic member 25 mounting position and the rotation shaft 26 of the ratchet 24 to the right side, the state of being biased in the right side rotation direction is maintained, and the left side When the ratchet 24 is moved, it is configured so as to maintain the biased state in the leftward rotation direction. Thus, in the storage position of the footrest 19, as shown in FIG. 7, the ratchet 24 is located on the right side. Footrest from this position
When 19 is rotated in the use position direction (arrow R direction), the operating claw 23c of the ratchet 24 is rotated counterclockwise in the drawing (arrow R direction).
The engaging claw 23c hooks the engagement pin 27 of the ratchet 24, rotates the ratchet 24 clockwise (direction of arrow L), and rotates the engagement end 28 of the ratchet 24 toward the cam 23 (direction of arrow L). As shown in FIG. 8, the engaging end 28 of the ratchet 24 is engaged with the first stop pawl of the cam 23 on the footrest 19 side.
The rotation of the footrest 19 can be stopped by engaging with the 23a to maintain the deployment angle of the footrest 19. Further, when it is desired to change from the use angle to the second-stage locking claw 23b, the footrest 19 is lifted slightly upward, and the locking end of the ratchet 24 is formed on the slope of the second-stage stopping claw 23b of the cam 23. 28 to arrow R
By pressing in the direction, the engagement end 28 of the ratchet 24 is separated from the engagement position with the stop pawl 23a, the ratchet 24 is engaged with the second-stage stop pawl 23b, and the footrest 19 can be held slightly upward ( (Fig. 8). Reverse footrest 19 to legrest 10
In the case of storing in the ratchet, the operating claw 23d of the cam 23 rotates in the clockwise direction (the direction of arrow L) in the drawing, the engagement pin 27 of the ratchet 24 is hooked, and this is rotated in the counterclockwise direction (the direction of arrow R), The engaging end 28 of 24 is separated from the cam 23 (arrow R
Direction) and the tension of the elastic member 25 allows the cam 23 to be maintained at that position.

In this embodiment, the set angle of the footrest 19 is configured in two steps, but if desired, three or more stop claws may be formed on the cam to form a plurality of use angles. Of course you can.

Next, a method of using the link type leg rest according to the present invention will be described.

When using the leg rest 10, operate the operation section (not shown) equipped on the center armrest, etc.,
The push rod 18 of the drive unit 17 is extended and pushed up diagonally forward and upward together with the rotary link L2 and the fixed link L1 to form a leg rest.
You can flip 10 up.

Next, the footrest 19 folded over the legrest 10 can be deployed in front of the legrest 10 so that the legrest 10 and the footrest 19 can be used integrally. At this time, the use inclination angle regulating means can change and adjust the use inclination angle of the footrest 19 in several steps.

When only the leg rest 10 is used, as shown in FIG. 3, the foot rest 19 may be used in the retracted state without being expanded.

On the other hand, when the leg rest 10 is not used, as shown in FIG. 2, the baggage is held in the space below the seat bottom 6 while keeping the leg rest 10 hanging downward from the front side of the seat. Can be prevented from moving.

[Effect of device]

Since the link type leg rest according to the present invention is configured as described above, the leg rest is attached to the rotating link and the fixed link that rotate reliably and smoothly, and the rotating link is located in the central portion. Therefore, the leg rest can be easily and smoothly flipped up.

Since a small link is used, the leg rest can be greatly flipped up with a small stroke of the pressing rod of the drive machine. In addition, all of these links are formed on the back of the leg rest, so it looks good and is very safe.

Further, in the footrest, the inclination angle of the footrest can be easily and freely changed by changing the engagement stage between the cam and the ratchet, and the usability of the footrest can be improved.

Furthermore, since the stop claw of the cam is one-way, the ratchet can be operated easily and smoothly, and the practical effect after the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is a side view of a partially cutaway seat showing an embodiment of a link type leg rest according to the present invention, FIG. 2 is a partially cutaway enlarged side view showing a link mechanism, and FIG. 3 is the same leg. FIG. 4 is a plan view in which the leg rest is partially omitted, FIG. 5 is a front view of the leg rest, and FIG. 6 is a use inclination angle. Fig. 7 is an exploded perspective view of the restricting means, Fig. 7 is an enlarged side view showing a state before deployment of the footrest, Fig. 8 is an enlarged side view showing a state in which the footrest is deployed at the first stage, and Fig. 9 is a side view showing the footrest. FIG. 10 is a partially cutaway side view showing a leg rest device using a conventional slide guide, and FIG. 11 is a side view of a main part showing a conventional foot rest, showing an enlarged front view showing a state in which it is deployed in a second stage. It is a figure. L1 …… Fixed link, L2 …… Rotation link 10 …… Legless, 11,12 …… Bracket 19 …… Foot rest, 20 …… Arm 22 …… Stopper 23 …… Cam, 23a, 23b …… Stop claw 23c, 23d …… Operating claw 24 …… Ratchet, 25 …… Elastic member 27 …… Pin, 28 …… Engaging end

Claims (4)

[Scope of utility model registration request] [Claim 1] A plurality of fixed links L1, L1 above the front legs of a seat
The fixed end of ... is pivotally mounted such that its free end is rotatable forward of the seat, and at a proper position between the fixed links L1, L1 ... from the pivotal position of the fixed links L1, L1. The fixed end of the rotary link L2 is pivotally mounted at a slightly lower position so that its floating end can rotate forward of the seat, and the floating end of each fixed link L1, L1 ... corresponds to the back surface of the leg rest. Pivotally attached to each installed bracket and the fixed link
The engaging shafts of the brackets formed above the pivotal positions of L1, L1 ... are engaged and mounted so as to slide in the long grooves formed in the free end of the rotary link L2, and the rotary links L2 By pressing or pulling the rear end portion from the rear, both the fixed links L1, L1 ... And the rotation link L2 are rotated in an arc shape around each pivotal portion, and the fixed link L
The leg rests are configured to be rotatable between the use position at the front upper part of the seat and the storage position at the lower part of the seat due to the displacement of the pivotal positions of 1, 1, and the rotation link L2 and the difference in movement of the rotation radius. Link type leg rest featuring. 2. The pivotal positions of the fixed ends of the fixed links L1, L1 ... And the pivotal positions of the fixed ends of the rotary links L2 are formed at substantially the same position. Link type footrest. 3. A pair of arms supporting both sides of the footrest are connected to a front end portion of the legrest, and the footrest formed on the arms is configured to be deployable forward of the legrest and used for predetermined use. 2. The link type footrest according to claim 1, wherein a use inclination angle restricting means of the footrest that can be stopped at a position is configured. 4. The footrest use inclination angle regulating means comprises a cam formed on the footrest side and a ratchet formed on the legrest side, and a plurality of the cams are formed on the outer peripheral edge thereof at a predetermined interval. Of the stop claw and the projection of the stop claw in the outer peripheral direction, and in response to the operation of the footrest in the use position direction or the storage position direction, engages with the engagement pin of the ratchet and cams the engagement end thereof. Is formed from the stop claw of the cam, or the operating end is formed to engage the engaging end with the stop claw of the cam, and the ratchet has the locking end with the pivot axis extension line direction as the top dead center. 4. The link type footrest according to claim 3, wherein the cam is pulled by an elastic member at all times in the engagement direction with the stop claw of the cam or in the separation direction.