JP6815896B2 - Seat rotation device - Google Patents

Description

The present invention rotatably supports an underframe to which a seat is attached on a footrest on the floor surface side, and restrains or releases the restraint of a seat whose direction is changed by the rotation of the underframe at a predetermined rotation position. A seat rotation device equipped with a lock mechanism is particularly mounted on a vehicle such as a railroad vehicle.

Conventionally, as a seat mounted on a vehicle such as a railroad vehicle, a seat rotating device capable of reversing the direction of the seat back and forth according to the traveling direction has been known. In such a seat, for example, a large gear is provided on the pedestal side of the seat, while a small gear driven by a motor is provided on the pedestal side, and the large gear is rotationally driven by the small gear to electrically rotate the seat. Was there.

Further, the seat rotating device is provided with a lock mechanism for restraining the seat at a position where the seat is inverted back and forth. In such a lock mechanism, in addition to releasing the restraint by depressing the foot pedal, a separate power source such as a solenoid for moving the foot pedal by power to automatically release the restraint is provided.

Further, as shown in Patent Document 1, a seat rotation device capable of rotating and unlocking a seat by the power of one motor has already been proposed. This is because the drive gear that rotates the underframe of the seat and the unlock pulley are rotatably supported on the output shaft of one motor, and the output of the motor is selectively transmitted to the drive gear or the unlock pulley. It has a switching member to be used.

The switching member is pivotally supported between the drive gear and the unlocking pulley so that rotational force can be transmitted from the output shaft, and can move in the axial direction between the position where the pulley is engaged and the position where the gear is engaged. It was provided in. In the output shaft of the motor, parallel pins are press-fitted into through holes that pass through the axis, and both ends of the parallel pins engage with the long holes in the axial direction on both sides of the switching member, so that the rotational force of the output shaft is reduced. It was transmitted to the switching member, and the switching member was movable in the axial direction of the output shaft within the range of the elongated hole.

The unlocking pulley was provided with a winding portion of an unlocking cable extended to a locking mechanism. When the motor is started with the switching member engaged with the unlocking pulley, the switching member is rotationally driven to rotate the unlocking pulley, and the unlocking cable is wound around the winding portion and pulled to lock. The mechanism is released from restraint. The tip of the release cable is connected to a rotation amount regulation stopper protruding from the outer circumference of the pulley.

JP-A-7-277047

However, in the seat rotating device described in Patent Document 1 described above, the parallel pins press-fitted into the through holes of the output shaft not only increase the number of parts but also may come off or break due to an impact load. , Further improvement was desired. Further, when the parallel pin is damaged, it is removed from the output shaft and repaired, but there is a problem that the rotating shaft cannot be reused because the through hole into which the parallel pin is press-fitted is deformed.

Further, the release cable pulled by the rotation of the lock release pulley is configured to be wound around the outer circumference of the pulley as it is, and it is necessary to set a large outer diameter of the entire pulley in order to secure the operation amount of the cable. Therefore, there is a limit to the miniaturization and weight reduction of the device. Moreover, if there is an error in the adjustment of the pulley stopper (rotation angle), excessive pulling force may be applied to the pedel when the pulley rotates, and there is a risk that the pulley rotation amount regulation stopper will be damaged or the cable will break. It was.

The present invention has been made by paying attention to the above-mentioned problems of the prior art, and it is possible to reduce the cost by reducing the number of parts, improve the quality of the shaft-rotating parts, and reduce the size. The purpose of the present invention is to provide a seat rotating device that can prevent damage to shaft-related parts and breakage of cables while achieving weight reduction.

The gist of the present invention for achieving the above-mentioned object lies in the inventions of the following items.
[1] A rotation mechanism (30) that rotatably supports an underframe (11) to which a seat (10) is attached on a footrest (1) on the floor surface side, and a direction as the underframe (11) rotates. In the seat rotation device (20) provided with a lock mechanism (40) for restraining or releasing the converted seat (10) at a predetermined rotation position.
The motor (51), the drive member (60) for rotating the underframe (11), the release member (70) for releasing the restraint by the lock mechanism (40), and the output of the motor (51) are driven. It has a switching member (80) that selectively transmits to the member (60) or the releasing member (70).
The driving member (60) and the releasing member (70) are rotatably supported by a rotating shaft (53) driven by the motor (51) so as to be separated from each other.
The switching member (80) is pivotally supported between the driving member (60) and the releasing member (70) by a spline so that a rotational force can be transmitted to the rotating shaft (53), and the releasing member (70) is supported. ), And a rotational drive position that engages with the drive member (60) and rotates integrally, are provided so as to be movable in the axial direction. Seat rotation device (20).

[2] The switching member (80) is formed in a drum shape, and a plurality of grooves fitted in a plurality of key grooves connected in parallel with the axial direction on the outer circumference of the rotating shaft (53) on the hollow inner circumference thereof. Is provided,
Engagement portions (81, 82) are provided on both end faces of the switching member (80), respectively.
A cover that engages the driving member (60) and the releasing member (70) with one end surface facing the switching member (80) so as to transmit a rotational force to the engaging portions (81, 82), respectively. The seat rotating device (20) according to the above [1], wherein the engaging portions (62, 72) are provided.

[3] A switching drive mechanism (90) for switching and moving the switching member (80) in the axial direction of the rotating shaft (53) is provided.
The seat rotating device (20) according to the above [1] or [2], wherein the power source of the switching drive mechanism (90) is a solenoid (91) having a smaller output than the motor (51). ..

[4] The release member (70) is formed in a cam shape, and includes an arm portion (71) extending from one end side of the outer circumference thereof in a direction orthogonal to the axial direction of the rotation axis (53).
A release cable (100) that extends to the tip end side of the arm portion (71) to the lock mechanism (40) and releases the restraint of the lock mechanism (40) by a pulling operation accompanying the rotation of the release member (70). The seat rotating device (20) according to the above [1], [2] or [3], wherein the seat rotating device (20) is connected.

[5] In the release member (70), the distance from the rotation center to the tip end side of the arm portion (71) is set to be three times or more the distance from the rotation center to the reference outer circumference. The seat rotating device (20) according to the above [4].

[6] Having a stopper (54) that regulates the rotation range of the release member (70),
The stopper (54) is arranged on both sides of the arm portion (71), and comprises a pair of convex portions that regulate the rotation range by abutting on both side surfaces of the arm portion (71). The seat rotating device (20) according to [4] or [5].

Next, the operation based on the above-mentioned solution will be described.
According to the seat rotation device (20) according to the above [1], the drive member (60) and the release member (70) are rotatably supported by the rotation shaft (53) so as to be separated from each other. It selectively engages with a switching member (80) that is pivotally supported so that a rotational force can be transmitted to the rotating shaft (53). Therefore, the drive member (60) and the release member (70) are separately rotationally driven by one motor (51) via the switching member (80), respectively.

Here, the switching member (80) is pivotally supported by a spline so that the rotational force can be transmitted to the rotating shaft (53). Therefore, the parallel pins in the prior art are not required, and the cost can be reduced by reducing the number of parts. In addition, the quality of the shaft-rotating parts can be improved without the risk of the parallel pins coming off or breaking. Further, according to the power transmission by the spline, it is possible to transmit a large rotational force, the strength of the shaft-rotating parts is increased, and the reliability is also improved.

Moreover, according to the spline structure, the switching member (80) can be easily moved in the axial direction of the rotating shaft (53). Therefore, the restraint release position in which the switching member (80) is engaged with the release member (70) and is rotated integrally, and the rotational drive position in which the switching member (80) is engaged with the drive member (60) and is rotated integrally are easily set. It can be switched. Further, the switching member (80) can be easily attached to and detached from the rotating shaft (53), and maintenance / inspection accompanied by assembly / disassembly can be easily performed.

According to the seat rotation device (20) according to the above [2], the switching member (80) is formed in a drum shape, and the switching member (80) is formed in a drum shape, and the hollow inner circumference thereof is parallel to the outer circumference of the rotation shaft (53) in the axial direction. A plurality of grooves are provided so as to fit into the plurality of key grooves that are continuously provided. By such a spline, the rotational force of the rotating shaft (53) is transmitted to the switching member (80).

Engagement portions (81, 82) are provided on both end faces of the switching member (80), respectively. On the other hand, the drive member (60) and the release member (70) are engaged with one end surfaces facing the switching member (80) so that the rotational force can be transmitted to the engaging portions (81, 82), respectively. Engagement portions (62, 72) are provided. Due to the engaging relationship between the engaging portion (81, 82) and the engaged portion (62, 72), the rotational force of the switching member (80) that rotates in synchronization with the rotating shaft (53) remains unchanged. It can be easily transmitted to the driving member (60) or the releasing member (70).

According to the seat rotation device (20) according to the above [3], the switching drive mechanism (90) for switching and moving the switching member (80) in the axial direction of the rotating shaft (53) is provided. By this switching drive mechanism (90), the switching member (80) is reliably moved to the restraint release position that engages with the release member (70) and the rotational drive position that engages with the drive member (60). Can be done. Here, the power source of the switching drive mechanism (90) is sufficient to be a solenoid (91) having a smaller output than the motor (51). Therefore, the sound during the switching operation can be suppressed to a low level, and the assembly can be easily performed.

According to the seat rotation device (20) according to the above [4], the release member (70) is formed in a cam shape and extends in a direction orthogonal to the axial direction of the rotation axis (53) from one end side of the outer circumference thereof. It is assumed that the arm portion (71) to be put out is provided. A release cable (100) extending to the lock mechanism (40) is connected to the tip end side of the arm portion (71).

As a result, the cable mounting radius can be greatly expanded without increasing the size of the cam base (reference outer diameter), as compared with the configuration in which the cable is wound around the outer circumference of the lock release pulley of the prior art. it can. Therefore, the attractive force of the release cable (100) can be significantly reduced compared to the size of the cam base, and the release cable (70) can be made smaller and lighter while the release cable (70) is made smaller and lighter. Excessive attractive force with respect to (100) is suppressed, and damage to the release member (70) itself and breakage of the release cable (100) can be prevented.

In particular, when the tension of the release cable (100) is weakened, even if an error occurs in the adjustment of the rotation angle of the release member (70), the release cable (100) can be reliably prevented from breaking. Further, the rotation angle of the release member (70) required for the pulling operation of the release cable (100) can be reduced, and the operation time of the release member (70) can be shortened accordingly.

Specifically, for example, as described in the above [5], in the release member (70), the distance from the rotation center to the tip end side of the arm portion (71) is the distance from the rotation center to the reference outer circumference. It is good to set it to 3 times or more. Here, the reference outer circumference is a portion of the outer circumference of the cam-shaped release member (70) where the distance from the center of rotation to the outer circumference is constant, except for the portion where the arm portion (71) extends.

As a result, for example, when the number is tripled, the pulling force of the release cable (100) is reduced to 1/3 as compared with the case where the release cable (100) is wound around the reference outer circumference of the cam as in the conventional technique. The rotation angle of the cam required for the pulling operation of the release cable (100) is also reduced to 1/3, and its operating time is also reduced to 1/3.

According to the seat rotating device (20) according to the above [6], the seat rotating device (20) has a stopper (54) that regulates the rotation range of the releasing member (70). The stoppers (54) are arranged on both sides of the arm portion (71), and are composed of a pair of convex portions that regulate the rotation range by abutting on both side surfaces of the arm portion (71). By using the arm portion (71) as a portion to be brought into contact with the stopper (54) in this way, it is not necessary to separately provide a configuration on the contact side with respect to the stopper (54), and the strength of the contact side is sufficient. Can be secured.

According to the seat rotating device according to the present invention, it is possible to reduce the cost by reducing the number of parts, and it is possible to improve the quality of the shaft-rotating parts. In addition, it is possible to prevent damage to shaft-related parts and breakage of cables while realizing miniaturization and weight reduction.

It is a perspective view which shows the drive mechanism of the seat rotation apparatus which concerns on embodiment of this invention in an exploded manner. It is a top view which shows the drive structure of the seat rotation apparatus which concerns on embodiment of this invention. FIG. 2 is a sectional view taken along line III-III of FIG. It is a front view which shows the drive structure of the seat rotation apparatus which concerns on embodiment of this invention. It is an enlarged front view which shows the release member of the drive structure of the seat rotation apparatus which concerns on embodiment of this invention. It is a top view which showed by omitting a part of the seat rotation apparatus which concerns on embodiment of this invention. It is a front view which showed by omitting a part of the seat rotation apparatus which concerns on embodiment of this invention. It is a front view of the seat provided with the seat rotation device which concerns on embodiment of this invention. It is a top view of the seat provided with the seat rotation apparatus which concerns on embodiment of this invention.

Hereinafter, embodiments representing the present invention will be described with reference to the drawings.
1 to 9 show an embodiment of the present invention.
In the seat rotating device 20 according to the present embodiment, the underframe 11 to which the seat 10 is attached is rotatably supported on the pedestal 1 on the floor surface side, and the direction of the seat 10 is changed as the underframe 11 rotates. Can be constrained or unrestrained at a predetermined rotation position. Hereinafter, a case where the seat 10 is applied to a three-seater stool for a railway vehicle will be described as an example.

As shown in FIGS. 8 and 9, in the seat 10, three seats 12 are arranged side by side on the underframe 11 for seating three people, and the backrest 13 is separately erected at the rear end of each seat 12. It is supported as much as possible. Each backrest 13 is supported so that the tilt angle can be adjusted via a reclining mechanism (not shown). The restraint of each tilt angle by the reclining mechanism is released in conjunction with the unlocking operation of the lock mechanism 40 described later, and each backrest 13 is configured to return to the initial position standing up from the backward tilted angle.

As shown in FIG. 7, the leg base 1 that supports the underframe 11 of the seat 10 has long support surface portions 1a in both sides fixed at predetermined positions on the floor surface side via a pair of leg portions 1b and 1b. It becomes. As shown in FIG. 6, cushion coil springs 2a and 2b for receiving the stopper protrusions 14a and 14b extending from both ends of the underframe 11 are mounted on one end of the support surface portion 1a.

The seat rotation device 20 includes a rotation mechanism 30 that rotatably supports the underframe 11 to which the seat 10 is attached on the pedestal 1 on the floor surface side, and the seat 10 whose direction is changed as the underframe 11 rotates. It is provided with a lock mechanism 40 for restraining or releasing the restraint at a predetermined rotation position. In the present embodiment, the predetermined rotation positions in which the seat 10 can be restrained are set to two rotation positions, an angle facing one side in the front-rear direction of the vehicle and an angle inverted 180 degrees from the angle and facing the other. ing.

As shown in FIGS. 6 and 7, the rotating mechanism 30 is configured as a unit in which a pair of upper and lower ring-shaped rotating discs 31 are rotatably combined with each other with a bearing or the like interposed between them. The rotating mechanism 30 is arranged around a circular hole 17 provided at substantially the center of the underframe 11, and the lower rotating disk 31 is fixedly fixed at the substantially center of the support surface portion 1a, while the upper rotating disk 31 is fixed. The bottom surface side of the underframe 11 is fixedly installed.

As shown in FIG. 7, the lock mechanism 40 pivotally supports the foot pedal 41 at one end of the support surface portion 1a of the pedestal 1 via the pivot 41a, and attaches the lock pin 42 to the intermediate portion of the foot pedal 41. By pushing in or releasing the footstep end 41b at the end of the foot pedal 41, the lock end 42a of the lock pin 42 is arranged so as to protrude from the surface of the end portion of the support surface portion 1a. Locked plates 16a and 16b having locking holes into which the locking ends 42a are inserted are fixedly fixed to the ends on both sides of the underframe 11. Further, the foot pedal 41 is urged by the urging spring 43 in the direction in which the lock end 42a of the lock pin 42 protrudes.

As shown in FIG. 1, the seat rotation device 20 is restrained by the motor 51, the drive member 60 for rotating the underframe 11, and the lock mechanism 40 as the drive mechanism 50 related to the rotation mechanism 30 and the lock mechanism 40. It has a release member 70 that releases the motor 51, and a switching member 80 that selectively transmits the output of the motor 51 to the drive member 60 or the release member 70. Here, the drive member 60 and the release member 70 are rotatably supported by a rotation shaft 53 driven by the motor 51 so as to be separated from each other.

As shown in FIGS. 1 and 2, the motor 51 is provided with a gearbox, and the relay shaft member 52 is consolidated to the output shaft 51a so as to be integrally rotated by the key 52a. There is. The base end of the rotating shaft 53 is connected to the tip of the relay shaft member 52 so as to rotate integrally, and the rotating shaft 53 extends coaxially with the output shaft 51a and is rotationally driven by the motor 51.

The rotating shaft 53 is basically made of a metal round bar, but a plurality of key grooves extending in parallel with the axial direction are continuously provided as splines on the outer periphery of the central portion in the axial direction. On the other hand, the hollow inner circumference of the switching member 80, which will be described later, is provided with a plurality of grooves that fit into the plurality of key grooves on the rotating shaft 53. That is, the switching member 80 is pivotally supported so that the rotational force can be transmitted to the rotating shaft 53 by a spline. The number and depth of spline grooves are, for example, design items that can be appropriately determined by the same module calculation formula as for gear design.

The drive member 60 is made of a sprocket, and is rotatably supported on the rotation shaft 53 on the tip side of the region where the spline is located via a spacer 61. Here, the tip end side of the rotating shaft 53 has an outer diameter (small diameter) at the groove bottom of the spline. On one end surface of the drive member 60 facing the switching member 80, a pair of engaged portions 62, 62 arranged on both sides with a rotation center in between are provided. Each engaged portion 62 is projected as a head of a screw fixed to one end surface of the drive member 60. The position of the rotating shaft 53 of the driving member 60 in the axial direction is fixed by an E-ring 63 or the like.

As shown in FIGS. 6 and 7, the drive member 60 is arranged on the lower surface side of the support surface portion 1a of the pedestal 1 together with the motor 51, the rotating shaft 53, and the like. Here, as shown in FIG. 4, a part of the teeth on the outer circumference of the sprocket, which is the drive member 60, protrudes toward the upper surface side of the support surface portion 1a. On the other hand, as shown in FIG. 6, in the underframe 11, the engaged portions 15 in which the teeth of the drive member 60 mesh with each other are formed as a row of perforations along the circumference centered on the rotation center S. ..

The release member 70 is formed in a cam shape, and is rotatably supported on the rotation shaft 53 on the proximal end side of the region where the spline is located via the spacer 73. Here, the base end side of the rotating shaft 53 has an outer diameter (large diameter) at the apex between the grooves of the spline. The release member 70 includes an arm portion 71 that extends from one end side of the circular outer circumference in a direction orthogonal to the axial direction of the rotation shaft 53.

In the present embodiment, the arm portion 71 extends with a width of about half the diameter of the cam base having the reference outer diameter. Further, the distance from the rotation center of the cam base to the tip end side of the arm portion 71 is set to three times the distance from the rotation center to the reference outer circumference. The shape and dimensions of such an arm portion 71 are design matters that can be appropriately determined, and may be set to a value larger than the above-mentioned three times. The middle of the arm portion 71 is lightened to reduce the weight so as not to impair the required rigidity.

As shown in FIGS. 2 and 5, a release cable 100 extended to the lock mechanism 40 is connected to the tip end side of the arm portion 71. As shown in FIG. 5, the connection here can be made detachable by inserting the pin 102 fixed to the tip of the inner cable 101 into the locking groove 71a provided at the tip of the arm portion 71. ing.

The release cable 100 (to be exact, the inner cable 101) releases the restraint of the lock mechanism 40 by being pulled by the arm portion 71 as the release member 70 rotates. That is, the release cable 100 extends toward the lock pin 42 at one end of the support surface portion 1a of the pedestal 1, and is connected to the connecting end 44 extending from the pivot pedal 41a of the foot pedal 41 to the opposite side. (See FIG. 7).

As shown in FIG. 1, a pair of engaged portions 72, 72 arranged on both sides with a rotation center in between are provided on one end surface of the release member 70 facing the switching member 80. Each engaged portion 72 is projected in a dog shape with respect to the outer circumference of the cam base. The position of the rotation shaft 53 of the release member 70 in the axial direction is fixed by an E-ring 74 or the like.

A pair of stoppers 54, 54 that regulate the rotation range of the release member 70 are provided at the end of the motor 51 on which the release member 70 faces. Each stopper 54 is projected as a head (convex portion) of a screw fixed to the side surface of a bracket that covers the end of the motor 51. Each stopper 54 is arranged on both sides of the arm portion 71 of the release member 70, and is set so as to regulate the rotation range by abutting on both side surfaces of the arm portion 71.

The switching member 80 is formed in a drum shape, and a plurality of grooves that fit into a plurality of key grooves on the outer periphery of the rotating shaft 53 are provided on the hollow inner circumference thereof (see FIG. 1). The switching member 80 is axially supported in a region of the rotating shaft 53 where the spline is located, can transmit a rotational force, and moves axially to both ends of the spline. As a result, the switching member 80 is selectively switched between a restraint release position that engages with the release member 70 and rotates integrally, and a rotary drive position that engages with the drive member 60 and rotates integrally.

The switching member 80 is formed with flanges forming both end surfaces thereof, and a dog-shaped engaging portion 81 is provided so as to project from the flange forming one end surface facing the release member 70. Similarly, a dog-shaped engaging portion 82 is provided so as to project from a flange forming the other end surface of the switching member 80 facing the drive member 60. Further, on the outer circumference of the switching member 80, a groove portion 83 is formed between the flanges forming both end faces.

When the switching member 80 is in the restraint release position, the engagement portion 81 on one end surface side engages with the engaged portion 72 of the release member 70, so that the release member 70 is rotationally driven together with the switching member 80. .. On the other hand, when the switching member 80 is in the rotational drive position, the engaging portion 82 on the other end surface side engages with the engaged portion 62 of the driving member 60, so that the driving member 60 is rotationally driven together with the switching member 80. Will be done.

As shown in FIG. 2, a switching drive mechanism 90 for switching and moving the switching member 80 in the axial direction of the rotating shaft 53 is arranged so as to be adjacent to the switching member 80. The switching drive mechanism 90 includes an electromagnetic solenoid 91 as its power source. Here, as the electromagnetic solenoid 91, one having a smaller output than that of the motor 51 is used. The electromagnetic solenoid 91 includes a plunger 91a that moves in and out electromagnetically, and a telescopic coil spring 92 is connected to the plunger 91a. Here, the tip of the coil spring 92 is connected to another coil spring 92a having a small spring constant so that its orientation is kept constant.

A switching swing member 93 is pivotally supported near the tip of the coil spring 92 via a pivot shaft 93a, and the tip of the coil spring 92 is connected to the base end of the switching swing member 93. The working end 94 of the switching swing member 93 is bifurcated and is fitted into the groove 83 of the switching member 80, and the working end 94 swings so that the switching member 80 is set to the restraint release position and the rotation drive position. It is set to be converted and driven. In the switching drive mechanism 90, since the switching member 80 is simply converted and moved, the electromagnetic solenoid 91 may have a small output (small size).

Next, the operation of the seat rotating device 20 will be described in detail.
In the seat rotation device 20, the underframe 11 to which the seat 10 is attached can be rotated 180 degrees on the pedestal 1 on the floor surface side, and the seat portion 12 and the backrest 13 can take rotation positions reversed back and forth. .. At the two rotational positions, the seat 10 or underframe 11 is constrained to that position by the locking mechanism 40.

When the seat 10 at the rotation position shown in FIGS. 6 and 7 is manually rotated, first, the foot pedal end 41b of the foot pedal 41 is stepped on to release the restraint by the lock mechanism 40. That is, when the stepping end 41b is stepped on, the stepping pedal 41 swings clockwise around the pivot 41a in FIG. 7.

Then, the lock pin 42 is pulled, and the lock end 42a retracts downward and comes out of the locked plate 16a, so that the underframe 11 is released from restraint and becomes rotatable. In conjunction with the operation of stepping on the foot pedal 41, the restraint by the reclining mechanism is also released, and the backrest 13 returns to the initial standing position. Therefore, the backrest 13 tilted backward when the seat 10 is rotated is in the front-rear direction. You can prevent it from interfering with another seat or wall.

Further, in FIG. 6, when the restraint of the underframe 11 is released, the bent cushion coil spring 2a pushes the stopper protrusion 14a to rotate a small amount. Therefore, even if the foot pedal 41 is released and the lock end 42a of the lock pin 42 protrudes, it is not fitted into the locked plate 16a and is not restrained again.

Next, when the underframe 11 is rotationally driven to rotate 180 degrees and is in the inverted position, the stopper protrusion 14b comes into contact with the cushion coil spring 2b and gains some momentum, so that the cushion coil spring 2b bends to a predetermined rotational position. Then, the lock end 42a of the lock pin 42 comes to the position of the locked plate 16b, retracts once, protrudes and is inserted into the locking hole of the locked plate 16b, and is again moved to the inverted position by the locking mechanism 40. The underframe 11 is restrained and held.

The seat 10 or the underframe 11 can be rotationally driven by the power of the drive mechanism 50. In FIG. 1, the release member 70 is pivotally supported on the rotation shaft 53 as freely as possible, and at the start of reverse rotation, the motor 51 is connected via a switching member 80 at a restraint release position that engages with the release member 70. The output can be transmitted. That is, in the state where the underframe 11 is restrained, the switching member 80 is switched to the side where the output of the motor 51 is transmitted to the releasing member 70, and the engaged portion 72 of the releasing member 70 is the switching member 80. It is engaged with the engaging portion 81 of.

When the motor 51 is started, the switching member 80 pivotally supported by the rotary shaft 53 by a spline is rotationally driven, and the release member 70 is also rotationally driven together with the switching member 80. When the release member 70 rotates, the release cable 100 connected to the tip end side of the arm portion 71 is pulled, so that the restraint of the lock mechanism 40 is released.

That is, when the release cable 100 is pulled, in the lock mechanism 40 shown in FIG. 7, the connecting end 44 is first pulled, and the same as when the foot end 41b of the foot pedal 41 is stepped on, clockwise in FIG. It swings, the lock pin 42 is pulled, and the lock end 42a is retracted downward to come out of the locked plate 16a. Therefore, the underframe 11 is released from the restraint and can rotate. At this time as well, as in the case of manual operation, the cushion coil spring 2a rotates the stopper protrusion 14a by a small amount, so that the cushion coil spring 2a is not restrained again.

During this time, the driving member 60 is rotatable with respect to the rotating shaft 53, and the driving force is not transmitted. After the restraint of the lock mechanism 40 is released, the electromagnetic solenoid 91 switches the switching member 80 to the side where the output of the motor 51 is transmitted to the driving member 60. The timing of this switching can be performed by detecting that the arm portion 71 is in contact with the stopper 54 and the release cable 100 can no longer be pulled and the load on the motor 51 is increasing. Further, a sensor for detecting the release position of the member of the lock mechanism 40 may be provided.

The switching movement of the switching member 80 is performed by the electromagnetic solenoid 91. In FIG. 2, when the electromagnetic solenoid 91 is energized in the forward direction, the plunger 91a retracts, the base of the switching rocking member 93 is pulled via the coil spring 92, and the switching rocking member 93 swings counterclockwise. Then, the switching member 80 is pushed by the working end 94 of the switching rocking member 93 fitted in the groove 83, moves in the axial direction of the rotating shaft 53, is separated from the releasing member 70, and is engaged with the driving member 60. Move to the matching rotational drive position.

When the switching member 80 moves toward the driving member 60, the engaging portion 82 of the switching member 80 and the engaged portion 62 of the driving member 60 engage with each other. Therefore, the output of the motor 51 is transmitted to the drive member 60 via the switching member 80, and when the drive member 60 is rotationally driven, the underframe 11 arranged around the rotation center S in FIG. 6 The engaged portion 15 is rotationally driven. In this way, the underframe 11 is rotated by the power of the motor 51.

When the release member 70 is released, the release cable 100 is pulled from the lock mechanism 40 side by the urging force of the urging spring 43 in an attempt to return the foot pedal 41, and the release member 70 returns to the original position. The lock mechanism 40 can be restrained, but as described above, since the cushion coil spring 2a pushes the stopper protrusion 14a to rotate it a small amount, it is not restrained at the original rotation position.

When the underframe 11 rotates 180 degrees and reaches a predetermined rotation position, the lock end 42a of the lock pin 42 matches the position of the locked plate 16b, and once retracted, then protrudes into the locking hole of the locked plate 16b. After fitting and inserting, the underframe 11 is restrained again by the lock mechanism 40 at the inverted rotation position. In the state where the underframe 11 is held in this way, the electromagnetic solenoid 91 is energized in the direction opposite to the above, and the switching member 80 is moved to the opposite side in the axial direction of the rotating shaft 53. Then, the switching member 80 is held at the restraint release position where the switching member 80 is disengaged from the drive member 60 and engaged with the release member 70.

When the seat 10 or the underframe 11 is inverted from such a position, the motor 51 is started to rotate in the reverse direction. Then, the release member 70 is rotated in the opposite direction, and the release cable 100 is pulled in the opposite direction by the arm portion 71, so that the restraint of the lock mechanism 40 is released. Subsequent operations are the same as the reversing operation except that the rotation directions of the motor 51, the seat 10 and the underframe 11 are different. Needless to say, when the seats 10 or the underframe 11 are reversed by power, the seats of one vehicle of the train or the seats of the entire train can be turned in the same direction all at once.

Next, the operation and effect of the seat rotation device 20 will be described.
As shown in FIG. 1, according to the main seat rotating device 20, the driving member 60 and the releasing member 70 are rotatably supported on the rotating shaft 53 so as to be separated from each other, and rotate on the rotating shaft 53 between them. It selectively engages with the switching member 80, which is pivotally supported so that the force can be transmitted. Therefore, the drive member 60 and the release member 70 are separately rotationally driven by one motor 51 via the switching member 80, respectively. As a result, the electric system can be centrally arranged, the drive mechanism 50 can be configured as a compact unit, and the assembling work to the vehicle body side becomes easy.

In particular, the switching member 80 is pivotally supported so that a rotational force can be transmitted to the rotating shaft 53 by a spline. Therefore, the parallel pins in the prior art are not required, and the cost can be reduced by reducing the number of parts. In addition, the quality of the shaft-rotating parts can be improved without the risk of the parallel pins coming off or breaking. Further, according to the power transmission by the spline, it is possible to transmit a large rotational force, the strength of the shaft-rotating parts is increased, and the reliability is also improved. As described above, the specific number and depth of spline grooves can be appropriately determined by the same module calculation formula as the gear design.

According to the structure of the spline, the switching member 80 can be easily moved in the axial direction of the rotating shaft 53. Therefore, the switching member 80 can be easily switched between the restraint release position that engages with the release member 70 and rotates integrally and the rotary drive position that engages with the drive member 60 and rotates integrally with a small force. .. As a result, the power source of the switching drive mechanism 90 for switching and moving the switching member 80 is a solenoid 91 having a smaller output than the motor 51. Therefore, the sound during the switching operation can be suppressed to a low level, and the assembly can be easily performed.

Moreover, since the switching member 80 can be easily attached to and detached from the rotating shaft 53, maintenance and inspection involving assembly and disassembly of the drive mechanism 50 can be easily performed. By the way, as shown in FIG. 1, in the rotating shaft 53, the base end side has the outer diameter (large diameter) at the top between the spline grooves, and the tip side has the outer diameter at the spline groove bottom. It has a diameter (small diameter). Therefore, it is possible to prevent the switching member 80, which is pivotally supported from the tip end side of the rotating shaft 53, from coming off from the base end side, and it is also convenient for maintenance and inspection.

Further, according to the main seat rotating device 20, the release member 70 is formed in a cam shape, and an arm portion 71 extending from one end side of the outer periphery thereof in a direction orthogonal to the axial direction of the rotating shaft 53 is provided. .. Then, a release cable 100 extending to the lock mechanism 40 is connected to the tip end side of the arm portion 71. As a result, the cable 100 mounting radius can be greatly expanded without increasing the size of the cam base reference outer diameter, as compared with the configuration in which the cable 100 is wound around the outer circumference of the lock release pulley of the prior art. it can.

Therefore, the attractive force of the release cable 100 can be significantly reduced compared to the size of the cam base, and the release member 70 can be made smaller and lighter, and is excessive with respect to the release cable 100. The attractive force is suppressed, and it is possible to prevent the release member 70 itself from being damaged and the release cable 100 from being broken. In particular, when the tension of the release cable 100 is weakened, even if an error occurs in adjusting the rotation angle of the release member 70, the release cable 100 can be reliably prevented from breaking. Further, by not winding the release cable 100 around the release member 70, it is possible to prevent wear such as peeling of the coating film of the cable 100.

Moreover, the rotation angle of the release member 70 required for the pulling operation of the release cable 100 can be reduced, and the operation time of the release member 70 can be shortened accordingly.
Further, since the arm portion 71 is also used as a portion to be brought into contact with the stopper 54 for rotation regulation, it is not necessary to separately provide a configuration of the contacted side with respect to the stopper 54, and sufficient strength of the contacted side is secured. can do.

According to the present embodiment, as shown in FIG. 5, in the release member 70, the distance from the rotation center to the tip end side of the arm portion 71 is set to three times the distance from the rotation center to the reference outer circumference. There is. As a result, the pulling force of the cable 100 is reduced to 1/3 as compared with the case where the cable 100 is wound around the reference outer circumference of the cam as in the conventional technique, and the rotation angle of the cam required for the pulling operation of the cable 100 is also 1/3. It is reduced to 3, and its operating time is also reduced to 1/3.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be changed or added without departing from the gist of the present invention. Included in the invention. For example, the specific shapes of the pedestal 1, the seat 10, the pedestal 11, and the like of the seat rotating device 20 are not limited to those shown in the figure. Further, as for the rotation mechanism 30, another well-known rotation mechanism may be substituted.

Further, in the seat 10 according to the present embodiment, the seat portion 12 and the backrest 13 are arranged side by side for three people, but they may be configured for one person or two people. good. Further, the rotation position for restraining the seat 10 by the lock mechanism 40 is not limited to the above-mentioned two inversions of 0 degrees and 180 degrees, and may be configured so that the seat 10 can be restrained at the rotation position in the middle of the rotation position. Further, when the seat is arranged close to the wall, a sliding motion of moving away from the wall when the seat rotates may be combined to avoid interference with the wall.

INDUSTRIAL APPLICABILITY The present invention can be widely used as a seat rotating device for vehicles installed in passenger rooms of railway vehicles, aircraft, automobiles, ships and the like.

1 ... Leg stand 10 ... Seat 11 ... Underframe 12 ... Seat 13 ... Backrest 20 ... Seat rotation device 30 ... Rotation mechanism 40 ... Lock mechanism 50 ... Drive mechanism 51 ... Motor 51a ... Output shaft 52 ... Relay shaft member 53 ... Rotating shaft 60 ... Drive member 70 ... Release member 71 ... Arm part 80 ... Switching member 90 ... Switching drive mechanism 91 ... Solvent 100 ... Release cable

Claims (6)

A rotation mechanism that rotatably supports the underframe on which the seat is attached on the floor side pedestal, and a lock mechanism that restrains or releases the restraint of the seat whose direction is changed by the rotation of the underframe to a predetermined rotation position. In the seat rotation device equipped with
It has a motor, a drive member that rotates the underframe, a release member that releases the restraint by the lock mechanism, and a switching member that selectively transmits the output of the motor to the drive member or the release member. ,
The driving member and the releasing member are rotatably supported on a rotating shaft driven by the motor while being separated from each other.
The switching member is pivotally supported between the driving member and the releasing member by a spline so as to transmit a rotational force to the rotating shaft, and engages with the releasing member to rotate integrally. A seat rotating device characterized in that it is provided so as to be movable in the axial direction at a rotational driving position that engages with the driving member and rotates integrally. The switching member is formed in a drum shape, and a plurality of grooves fitting into a plurality of key grooves connected in parallel with the axial direction are provided on the outer circumference of the hollow inner circumference thereof.
Engagement portions are provided on both end faces of the switching member.
A claim characterized in that an engaged portion that engages with the engaging portion so as to be able to transmit a rotational force is provided on one end surface of the driving member and the releasing member facing the switching member. Item 1. The seat rotating device according to item 1. It has a switching drive mechanism for switching and moving the switching member in the axial direction of the rotating shaft.
The seat rotating device according to claim 1 or 2, wherein the power source of the switching drive mechanism is a solenoid having a smaller output than the motor. The release member is formed in a cam shape, and includes an arm portion that extends from one end side of the outer circumference thereof in a direction orthogonal to the axial direction of the rotation axis.
Claims 1 and 2 are characterized in that a release cable extending to the lock mechanism and releasing the restraint of the lock mechanism by a pulling operation accompanying rotation of the release member is connected to the tip end side of the arm portion. Or the seat rotating device according to 3. The seat rotating device according to claim 4, wherein in the release member, the distance from the rotation center to the tip end side of the arm portion is set to be three times or more the distance from the rotation center to the reference outer circumference. .. It has a stopper that regulates the rotation range of the release member.
The seat rotation according to claim 4 or 5, wherein the stoppers are arranged on both sides of the arm portion and consist of a pair of convex portions that regulate the rotation range by abutting on both side surfaces of the arm portion. apparatus.

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