JPS6337731B2 - - 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 sheet at its four corners and position it accurately using positioning pins or the like. However, when the rotary seat is configured in this manner, it is necessary to lift the seat using an operating handle or the like to remove the positioning pin or avoid protrusions below the seat. Moreover, even if you raise the seat by operating the operating 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 a roller for rotating the sheet on the lower surface of the rotary sheet, and when rotating, the sheet is pushed up and the roller rolls on the plate of the leg. A push-up lever is provided on the operation shaft that is rotated by the lever so as to protrude directly below the roller, and the push-up lever is rotated to push up the roller and raise the sheet, and at the same time, when the lift is finished, the roller is set aside. By configuring the sheet to be sent out and placed on the plate of the leg, a holding mechanism to temporarily hold the sheet when it is raised becomes unnecessary, simplifying the device, and also allowing the sheet to be placed on the plate of the leg while it is being rotated. The object of the present invention is to enable the robot to return to its original position (initial lowered state) from any position. Furthermore, the present invention is further configured to rotate the operating shaft by moving the seat back forward and push up the seat.
The seat can be easily rotated, and the weight can be removed easily.
The purpose is also to prevent damage caused by unbalanced loads and ensure the safety of the seat.

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 attached to the upper part of the frame 3.
is provided, and a vertical bearing 5 is fixed to 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 rotating shaft 7 is vertically fixed to the center of the rotary shaft 7, and a pair of rotating rollers 8, 8 are mounted on the lower surface of the mounting plate 6 by brackets 9, sandwiching this rotating 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 (all not shown) provided at the four corners of the legs 1. 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 as shown in FIG. A push-up lever 12 that projects directly below and a link lever 13 that projects downward are fixed. Further, a torsion spring 14 for returning rotation 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, 21 holds the bearing 5 between the operating shafts 1 and 21.
This is an interlocking shaft that is rotatably arranged between the side walls of the frame 3 in parallel with the push-up lever 12. A lever 12' is fixed. Further, a link lever 22 is fixed to the interlocking shaft 21, and the rotation of the operating shaft 12 is interlocked by a connecting rod 24 installed between the link lever 22 and a link lever 23 fixed to the operating shaft 12. The signal is transmitted to the shaft 21, and the interlocking shaft 21 is rotated in the opposite direction to the operating shaft 12. Furthermore, inclined surfaces 12a, 12a' are formed at the tips of the push-up levers 12, 12'.

Therefore, when the operating handle 11 is pushed down, the operating shaft 10 is rotated counterclockwise, the hooks 19, 19' are removed from the strikers 18, 18', the fixation of the seat is released, and the seat is pushed up. The levers 12, 12' are rotated upward and come into contact with the rotating rollers 8, 8, pushing them up and raising the sheet 2. As shown in FIG. 6, in the vicinity where the rotating roller 8 comes out of the groove 4a, the roller is pushed sideways by the inclined surfaces 12a, 12a' of the push-up levers 12, 12' and is sent out from the groove 4a. Then, the sheet 2 rotates slightly and is supported by the rotating rollers 8, 8 which have moved onto the support plate 4, and becomes rotatable about the rotating shaft 7.

As shown in FIG. 3, an L-shaped locking lever 28 is rotatably attached to a support shaft 27 arranged parallel to the operating shaft 10 between the side walls of the frame 3. The lever 28 is constantly urged counterclockwise by a torsion spring 29. Also, one end of the locking lever 28 is attached to the mounting plate 6.
and a stepped portion 28a on the lower surface of the other end.
is formed, and the locking lever 28 is disposed such that the stepped portion 28a intersects the rotation locus of the locking pin 30 at the tip of the hook 19. When the seat 2 is raised, the locking lever 28 is rotated counterclockwise by the restoring force of the torsion spring 29, and the stepped portion 28a at the tip is connected to the striker by the connecting rod 15. It engages with the locking pin 30 of the disengaged hook 19 to lock it. Further, when the seat is lowered, the locking lever 28 is pushed down by the mounting plate 6 and rotates, the locking pin 30 is removed from the stepped portion 28a, the hook 19 engages with the striker 18, and the seat 2 is lowered. It is becoming fixed. Note that 31 is a stopper pin that restricts the rotational position of the locking lever 28.

Next, FIG. 7 shows another embodiment of the present invention, in which an operating lever 34 is fixed to the lower end of the side of the seat back 33 of the reclining seat, and an operating handle is provided on the operating shaft 10 in the leg. Without,
An operating rod 35 is slidably disposed in a direction perpendicular to the operating shaft 10, and the tip of the operating rod 35 is pin-coupled to a lever 36 provided on the operating shaft 10.
A contact piece 35a bent upward is provided at the rear end. Further, a compression spring 38 is attached to the base at the rear of the seat on the fixed side by a fixing metal fitting 37. When the seat back is tilted to the normal forward tilted position (imaginary line A), the operating lever 34
When the seat back contacts the compression spring 38 and further tilts the seat back forward (imaginary line B), the operating lever 34 resists the compression spring 38 and the contact piece 35 of the operating rod 35
The seat is raised by pressing a to move it backward and rotating the operating shaft 10.
The operating lever 35 is also provided symmetrically on the opposite side of the leg, so that even when the seat is rotated 180 degrees, the operating lever 34 slides the other operating lever to rotate the operating shaft 10. It's getting old.

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. Furthermore, by folding the seatback forward, the operating shaft is rotated, and the seat is pushed up. This makes it easy to rotate the seat, and it is possible to do so without removing the person or luggage on the seat. Since the seat back cannot be tilted forward, the seat can be prevented from being damaged due to excessive weight or unbalanced loads, and safety can be ensured.

[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. 5 is an enlarged explanatory view of the main parts, FIG. 6 is an explanatory view of the operation of the push-up lever, and FIG. 7 is an explanatory side view showing another embodiment of the present invention. 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'... Push-up lever, 13... Link lever, 15, 15' ...Connecting rod, 16,1
6'... Operating shaft, 18, 18'... Striker, 1
9, 19'... Hook, 28... Locking lever, 2
8a... Step portion, 29... Torsion spring, 33... Seat back, 34... Operating lever, 35... Operating rod, 35a... Contact piece, 36... Lever.

Claims (1)

[Scope of 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 are arranged facing each other with the rotating shaft in between, A frame is formed that includes a support plate that fixes orthogonally bearings that fit the rotating shaft, and has a pair of left and right grooves that fit the rotating roller, and a frame is provided at the front and rear parts of the frame. A link lever rotatably supports a striker protruding from the underside of the seat and a removable hook, one end of a connecting rod is connected to each hook, and the other end is rotated by rotation of an operating shaft. a push-up lever is provided protrudingly on the operation shaft, an end of the push-up lever extends near the kerf so as to be able to come into contact with the rotating roller, and one end is connected to the mounting plate. An L-shaped locking lever that comes into contact with the lower surface of the hook is rotatably biased and pivotally supported by 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. A seat rotation device featuring: 2 The above seat is a reclining seat,
An operating lever is fixed to the lower end of the side of the seat bag, and the other end of the operating rod is provided with an abutment piece that is detachable from the operating lever at one end, and is connected to the link lever or a lever protruding from the operating shaft, 2. The seat rotating device according to claim 1, wherein the actuating lever pulls an actuating rod when the seat bag is folded forward, and the operating shaft is rotatable via a link lever or a lever.