JPS6337730B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat rotation device for changing the longitudinal orientation of a seat in an automobile, bus, railway vehicle, or the like.

If the rotary seat has poor positioning accuracy at the stop positions before and after rotation, the seat is likely to wobble. Furthermore, in order to eliminate vertical wobbling of the seat, it is necessary to prevent the seat sinking from changing due to changes in the load applied to the seat. To this end, it is best to firmly support the seat at its four corners and position it accurately using positioning pins or the like. However, when a rotary seat is configured in this way, it is difficult to lift the seat using an operating handle or the like to remove the positioning pin when rotating.
It becomes necessary to avoid protrusions below the seat. Moreover, even if you raise the seat by operating the handle, the seat will drop back down and return to its original position when you release your hand, so a holding mechanism is required to hold the seat after it has been raised. Become. However, if a holding mechanism is provided, the device becomes complicated, and once the holding mechanism is activated, it cannot be returned to the original position during rotation unless it is released.

Therefore, this invention has rollers for rotating the sheet on the lower surface of the rotary sheet, and when rotating, the sheet is pushed up and the rollers are rolled on the leg plates. One end of the push-up lever that is moved up and down to push up the rotary sheet comes into contact with the abutment part (roller) of the leg, and this push-up lever pushes up the roller to raise the sheet, and also pushes it up while it is rising. The lever is pushed by the abutting part and rotates, sending out the rollers on the bottom of the sheet and placing them on the leg plates, which is used to temporarily hold the sheet when it is raised. It is an object of the present invention to simplify the apparatus by eliminating the need for a mechanism, and to enable a rotating seat to be returned to its original position (initial lowered state) from any position.

An embodiment of the present invention will be described below based on the drawings. In FIG. 1, 1 is a leg fixed to the floor of a vehicle body, and 2 is a seat rotatably placed on this leg 1. Next, in FIG. 2, reference numeral 3 denotes a frame of the seat rotation device provided in the center of the leg 1, and a support plate 4 is provided on the upper part of the frame 3.
is provided, and a vertical bearing 5 is fixed in the center thereof. Reference numeral 6 denotes a mounting plate fixed to the center of the bottom surface of the seat 2, and this mounting plate 6
A rotary shaft 7 is vertically fixed to the center of the rotary shaft 7, and a pair of rotary rollers 8, 8 are mounted on the lower surface of the mounting plate 6 by brackets 9, sandwiching this rotary shaft 7. The shaft 7 is inserted into a bearing 5 at the center of the leg, and the rotating rollers 8, 8 roll on the support plate 4, so that the sheet 2 can be rotated. Note that at the positions where the sheet 2 faces forward and backward, the rotating rollers 8, 8 cut into the grooves 4 formed in the support plate 4.
a, 4a to lower the seat. In this lowered state, the seat 2 is supported by dampers provided at the four corners of the lower surface of the seat 2 in contact with damper receivers provided at the four corners of the legs 1 (all not shown). It's becoming like that.

Reference numeral 10 denotes an operating shaft that penetrates one side wall of the frame 3 and projects to the side of the leg 1;
An operating handle 11 is fixed to the outer end of the frame 3, and the inner end of the operating handle 11 is suspended horizontally on both side walls of the frame 3, and extends to the sides of the rotating shaft 7 and the bearing 5, as shown in FIG. a protruding actuation lever 12;
A link lever 13 protruding downward is fixed. Further, a return torsion spring 14 (see FIG. 5) is attached to the operating shaft 10.

One end of the connecting rod 15, 15' is locked to the lower end of the link lever 13, and
Operating shafts 16, 16' are horizontally suspended at the front and rear of the frame 3 parallel to the operating shaft 10, and driven levers 17, 1 are fixed to the operating shafts 16, 16'.
The other ends of the connecting rods 15, 15' are locked to 7'. Furthermore, hooks 19 and 19' that can be engaged with strikers 18 and 18' fixed to the lower surface of the seat 2 are fixed to the operating shafts 16 and 16', respectively, and the operating handle 11 is operated in the direction of the arrow. Then, the operating shaft 10 is rotated, and the link lever 1
3. The operating shaft 16 is rotated via the connecting rod 15 and the driven lever 17, and the hook 19 is moved to the striker 18.
It's starting to come off. In addition, hook 1
9 and 19' are each attached outward,
Correspondingly, the driven lever 17 is provided upward and the driven lever 17' is provided downward, and the hooks 19 and 19' are provided so that the actuating shafts 16 and 16' are rotated in opposite directions. Strikers 18 and 1 are constantly activated by torsion springs 20 and 20', respectively.
8'.

Next, as shown in FIG. 5, the tip of the actuating lever 12 has an inverted-shaped pusher so that it is located directly below the rotating roller 8, which engages with the cut groove 4a of the support plate 4 and descends. A lifting lever 21 is rotatably mounted, and this lifting lever 21 is supported by a torsion spring 22.
The end portion on the operating shaft 10 side is biased so as to come into contact with the pressing roller 23 fixed to the lower surface of the support plate 4 from below. Furthermore, an interlocking shaft 24 is horizontally suspended between the side walls of the frame 3 in parallel to the operating shaft 10 with the bearing 5 in between, and the interlocking shaft 24 is connected to a lever 25 fixed to this and a link lever 26 of the operating shaft 10. The rotation of the operating shaft 10 is transmitted by a connecting rod 27 installed between the two. Further, an actuation lever 12' and a push-up lever 21' are attached to the interlocking shaft 24 symmetrically with the above-mentioned operating lever 12 and push-up lever 21, and one end of the push-up lever 21' is used to press the lower surface of the support plate 4. It is in contact with the roller 23'. The other end of the push-up lever 21 is formed with inclined surfaces 21a and 21a'.

Therefore, when the operating handle 11 is pushed down, the operating shaft 10 is rotated counterclockwise, and the hooks 19, 19' are removed from the striker.
The operating levers 12, 12' are rotated upward, and the push-up levers 21, 21' abut against the rotating rollers 8, 8 to push up the sheet 2. Therefore, the pivot point of the push-up levers 21, 21' is the operating lever 12,
As the lever 12' rotates, it rises, but since one end of the push-up lever 21, 21' is in contact with the pressure roller 23, 23', as the push-up lever rises, one end is moved by the pressure roller. As shown in FIGS. 6b and 6c, the inclined surfaces 21a and 21a of the push-up levers 21 and 21'
21a', the sheet 2 is forcibly sent out from the kerf 4a, and the sheet 2 rotates slightly and is supported by the rotating rollers 8, 8 which have moved onto the support plate 4 and can rotate around the rotating shaft 7. It becomes a state.

As shown in FIG. 3, an L-shaped locking lever 31 is rotatably attached to a support shaft 30 that is arranged parallel to the operating shaft 10 between the side walls of the frame 3. The lever 31 is always urged counterclockwise by a torsion spring 32. Also, one end of the locking lever 31 is attached to the mounting plate 6.
and a stepped portion 31a on the lower surface of the other end.
is formed, and the locking lever 31 is disposed such that the stepped portion 31a intersects the rotation locus of the locking pin 33 at the tip of the hook 19. When the seat 2 is raised, the locking lever 31 is rotated counterclockwise by the restoring force of the torsion spring 32, and the stepped portion 31a at the tip is connected to the striker by the connecting rod 15. It engages with the locking pin 33 of the disengaged hook 19 to lock it. Further, when the seat is lowered, the locking lever 31 is pushed down by the mounting plate 6 and rotates, the locking pin 33 is removed from the stepped portion 31a, the hook 19 engages with the striker 18, and the seat 2 is lowered. It is becoming fixed. Note that 34 is a stopper pin that restricts the rotational position of the locking lever 31.

As explained above, the seat rotation device according to the present invention has rollers for rotating the seat on the underside of the rotary seat and pushes up the seat during rotation, and the seat rotation device can be operated by one-touch operation of the operating handle. As a result, the hook that engages with the striker of the sheet is first released, and then the push-up lever guides the rotating roller upward along the kerf, places the rotating roller on the support plate, and uses it to change direction. After rotation, when the rotating roller is dropped into the kerf again, the striker of the sheet automatically engages the hook and the sheet is securely and safely fixed to the frame. In addition to making the operation of changing the direction of this type of sheet extremely simple, quick, and easy, there is no need for a holding mechanism to temporarily hold the sheet when it is raised, which simplifies the device and improves rigidity. Can be configured as high,
Additionally, since there is no holding mechanism, the seat can be reliably lowered and fixed in a predetermined position, while it is also extremely easy to return the rotating seat from any position to its original position, making it ideal for use as a vehicle seat. Since rotation and fixing operations can be performed extremely easily and reliably, it is safe and appropriate.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the external appearance of a rotary seat, Fig. 2 is a perspective explanatory view schematically showing a seat rotation device according to the present invention, Fig. 3 is a cross-sectional side view thereof, and Fig. 4 is a cross-sectional front view thereof. FIG. 5 is an enlarged explanatory view of the main part, and FIG. 6 is an explanatory view of the action of the push-up lever. 1...Leg, 2...Seat, 3...Frame, 4
... Support plate, 4a ... Cut groove, 5 ... Bearing,
6... Mounting plate, 7... Rotating shaft, 8... Rotating roller, 10... Operating shaft, 11... Operating handle, 12, 12'... Operating lever, 13... Link lever, 15, 15'... ...Connecting rod, 18...Striker, 19,19'...Hook, 21,2
1'... Push-up lever, 23, 23'... Press roller, 31... Locking lever, 31a... Step portion, 32
...Torsion spring.

Claims (1)

[Claims] 1. A mounting plate is fixed to the center of the lower surface of the sheet, a rotating shaft is vertically disposed on the mounting plate, and a pair of rotating rollers facing each other with the rotating shaft in between are arranged, and the rotating shaft is fitted. A frame is formed with a support plate having a pair of right and left grooves in which the rotating rollers are fitted, and a support plate is formed in which bearings are fixed orthogonally to each other, and a support plate is provided with a support plate having a pair of left and right grooves into which the rotating rollers are fitted. A hook that can be connected to and detached from the striker is rotatably supported, and one end of a connecting rod is connected to each hook, and the other end is connected to a link lever that rotates when the operating shaft is rotated.
An operating lever is provided protruding from the operating shaft, and an inverted push lever is provided at the end of the operating lever, located near the groove, capable of contacting the rotating roller, and movable up and down to the upper part of the groove. A lifting lever is rotatably pivoted, and one end of the push-up lever is in contact with a pressure roller that is rotatably supported on the frame, and one end is in contact with the lower surface of the mounting plate. A seat rotating device characterized in that a locking lever is rotatably biased and pivotally supported on the frame, and the other end of the locking lever is formed with a stepped portion that can be engaged with and detached from the hook.