TWI738969B - Seating device - Google Patents

Abstract

The present invention provides a seat device capable of moving a movable part with a relatively light force. The rotating shaft (11) rotates by rotating the operating lever (10). The rotation force of the rotating shaft (11) is used to drive the leg support (5). The first gear (91) is linked with the rotating shaft (11). The first locking portion (92) is locked to the first gear (91) and rotates the first gear (91) in accordance with the rotation operation of the operating lever (10). The first gear (91) and the first locking portion (92) are of a ratchet structure. If the operating lever (10) is rotated in one direction, the first locking portion (92) is locked to the first gear (91) ) So that the rotating shaft (11) rotates in one direction, and if the operating lever (10) is rotated in the other direction, the first locking portion (92) is not locked to the first gear (91) and will not Rotate the rotating shaft (11).

Description

Seating device

The present invention relates to seating devices such as passenger seats for vehicles.

Conventionally, as the aforementioned seat device, a leg rest (movable portion) that is rotatable between the deployed position and the storage position has been used. Patent Document 1 describes a seat device that transmits the operating force of the operating lever to the leg rest to expand and store the leg rest.

However, in order to reduce the operation lever, it is necessary to provide a transmission mechanism between the operation lever and the leg support in which the driving amount of the leg support is smaller than the operation amount of the operation lever. However, in the seat device of Patent Document 1, the operating lever is rotated in only one direction to drive the leg rest. Since the rotation range of the operating lever is limited, there is the first problem that the operating lever cannot be sufficiently reduced.

The seat device with the reclining mechanism is set to move freely from the reclining position where the backrest is tilted to the upright position where the backrest is standing up. In addition, a seat device that slides the seat forward in conjunction with the tilting of the backrest is also considered.

In order to slide the seat in the aforementioned manner, the following structure is considered (Patent Document 1). The side part of the underframe is arranged so that the backrest and the left and right sides of the seat part are interposed. A guide groove along the front-rear direction is formed on the side of the chassis, and a guide pin protruding from the seat is inserted into the guide groove. According to this, the guide pin moves along the guide groove so that the seat portion can move freely in the front-rear direction with respect to the side portion of the chassis.

However, for maintenance, the front end of the seat must be raised upward. However, in the foregoing structure, in order to raise the seat portion, the guide pin must be detached from the seat portion, so there is a second problem that the maintenance operation is cumbersome.

[Prior Art Document] [Patent Document] [Patent Document 1] JP 2008-29465 A

[Technical Problem to be Solved by the Invention] The present invention was completed in view of the above background, and its first problem is to provide a seat device capable of moving a movable part with a lighter force.

In addition, the present invention has been completed in view of the above background, and its second problem is to provide a seat device that can easily raise the seat.

[Technical Means] A seat device as a first aspect of the present invention completed to solve the above-mentioned first problem includes: an operating portion for rotating the operating portion; and a rotating shaft that is formed by rotating the operating portion. The rotating shaft is rotated; and the movable portion uses the rotational force of the rotating shaft to drive the movable portion, the seat device is characterized by including a transmission mechanism that transmits the rotational force of the operating portion to the rotating shaft, the transmission The mechanism transmits the rotational force of the operating portion in one direction to the rotating shaft, and the rotational force of the operating portion in the other direction is not transmitted to the rotating shaft.

On the basis of the first aspect, the seat device of the second aspect of the present invention is characterized in that the transmission mechanism is a ratchet structure, and the ratchet structure includes: a first gear that causes the rotation shaft to rotate when the first gear rotates And a first locking portion, the first locking portion is linked with the operating portion, when the operating portion rotates in one direction, the first locking portion is locked to the first gear so that the first A gear rotates in one direction, and when the operating portion rotates in the other direction, the first locking portion is not locked to the first gear and does not cause the first gear to rotate in the other direction.

Based on the first aspect or the second aspect, the seat device of the third aspect of the present invention is characterized in that the aforementioned movable portion is a leg support.

Based on the first aspect to the third aspect, the seat device of the fourth aspect of the present invention is characterized by including a locking mechanism that allows the rotation of the rotation shaft in one direction and prohibits the rotation of the rotation shaft in one direction. Rotation of the axis of rotation in the other direction.

On the basis of the aforementioned locking mechanism of the fourth aspect, the seat device of the fifth aspect of the present invention is characterized in that the aforementioned locking mechanism is a ratchet structure, the ratchet structure includes: a second gear, the second gear and The aforementioned rotating shaft linkage; and a second locking portion, when the aforementioned rotating shaft rotates in one direction, the second locking portion is not locked by the aforementioned second gear to allow the rotation of the aforementioned rotating shaft, when the aforementioned rotating shaft When rotating in the other direction, the second locking portion is locked to the second gear to prohibit the rotation of the rotating shaft.

On the basis of the fourth aspect or the fifth aspect, the seat device of the sixth aspect of the present invention is characterized in that the operation part has a main body part and an operation piece provided to swing freely relative to the main body part. When the operating piece swings in one direction, it comes into contact with the main body portion so that the main body portion also rotates in one direction. When the operating piece swings in the other direction, the operating piece swings in the other direction relative to the main body portion to lock the lock The agency is dismissed.

In addition to the second aspect, a seat device according to a seventh aspect of the present invention is characterized by including: a stopper that abuts the operation portion to restrict rotation in another direction; and a restriction When the operating portion is in the contact position with the stopper, the restricting portion is in contact with the first locking portion to separate the locking portion from the first gear.

The seat device of the eighth aspect of the present invention completed in order to solve the above-mentioned second problem includes: a base frame; a seat frame provided to be freely movable in the front-rear direction with respect to the aforementioned base frame; and a back frame, the back frame Installed to be tiltable relative to the seat frame, tilting in conjunction with the forward movement of the seat frame, and standing up in conjunction with the rearward movement of the seat frame, the seat device is characterized in that it has a fixed to the underframe An upper rail along the front-rear direction is provided with a traveling shaft that travels above the rail in the seat frame.

On the basis of the eighth aspect, the seat device of the ninth aspect of the present invention is characterized in that the base frame has side plates facing in the left-right direction, a guide groove is provided on the side plate, and the back frame is provided with The guide pin inserted into the guide groove moves along the guide groove, so that the back frame tilts in conjunction with the forward movement of the seat frame, and stands up in conjunction with the rearward movement of the seat frame.

On the basis of the eighth aspect or the ninth aspect, the seat device of the tenth aspect of the present invention is characterized in that the base frame has side plates opposed to the left and right directions, and guide grooves are provided on the side plates. The back frame is provided with a guide pin inserted into the guide groove, and the guide pin moves along the guide groove, so that the back frame tilts in conjunction with the forward movement of the seat frame, and in conjunction with the rearward movement of the seat frame Stand up.

On the basis of the tenth aspect, the seat device of the eleventh aspect of the present invention is characterized in that the guide pin has: a first pin portion having a penetrating through the back frame and the guide groove A first shaft portion, and a first flange portion provided at one end of the first shaft portion and overlapped and fixed to the back frame; a second pin portion having a first shaft portion penetrating the first shaft portion A second shaft portion, and a second flange portion provided on the other end of the second shaft portion and overlapped with the other end of the first shaft portion; and an additional mounting portion provided on the second pin portion One end prevents the second shaft portion from falling off the first shaft portion, and the first shaft portion is divided into a back frame shaft portion of the back frame and a chassis shaft portion inserted into the guide groove.

[Effects of the Invention] According to the first aspect described above, by repeatedly rotating the operating portion in one direction and rotating in the other direction, the rotating shaft can be rotated in one direction to drive the movable portion. According to this, even if the rotation range of the operation portion is narrow, the operation amount of the operation portion can be sufficiently increased compared to the drive amount of the movable portion. Therefore, the operation portion can be rotated with a light force to drive the movable portion.

According to the second aspect, the transmission mechanism can be simply constituted by the ratchet structure.

The seated person operates the operation part with the feet placed on the leg rests. Therefore, if the operating portion is heavy, the seated person pedals his foot to apply force in a direction that hinders the driving of the leg rest. Therefore, the operating part becomes heavier. According to the third aspect, the operation part can be rotated with a lighter force. Therefore, the seated person does not need to pedal the foot placed on the footrest, and the effect is better.

According to the fourth aspect, while the operating portion is rotated in the other direction by the lock mechanism, the rotating shaft does not rotate in the other direction.

According to the fifth aspect, the lock mechanism can be simply constructed by the ratchet structure.

According to the sixth aspect, the operation for driving the movable portion and the unlocking operation of the lock mechanism can be performed by using one operation piece.

According to the seventh aspect, when the operating portion is in the abutting position, the first locking portion and the first gear allow the rotation shaft to rotate in another direction.

According to the eighth aspect, the traveling shaft provided in the seat frame travels above the rail to move freely in the front-rear direction. Therefore, the seat frame can be easily raised.

According to the ninth aspect, the rail is supported above the front connecting portion of the chassis. According to this, the seat frame can be stably supported so as to be freely movable in the front-rear direction.

According to the tenth aspect, the back frame can be tilted freely in conjunction with the movement of the seat frame in the front-rear direction.

According to the eleventh aspect, the guide pin can be removed from one side and the other side in the axial direction.

(First Embodiment) Hereinafter, a seat device according to a first embodiment of the present invention will be described with reference to FIGS. 1A to 13. In addition, the up, down, left, and right, front and back used in the following description refer to the up, down, left, and right, front and back as viewed from a seated person sitting on the seat device.

The seat device 1 of the first embodiment is a passenger seat installed in a passenger compartment of a vehicle such as a railway vehicle. As shown in FIGS. 1A and 1B, the seat device 1 includes a base frame 2, a seat portion 3, a backrest 4, a leg rest 5 as a movable portion, and a leg rest drive mechanism 6.

The underframe 2 is fixed on the rotating table and supports the seat 3 and the backrest 4. In this embodiment, with respect to one underframe 2, two seat portions 3 and two backrests 4 are aligned and supported in the left-right direction. Since the seat 3 and the backrest 4 arranged on the left and right are substantially the same, the description will be made with one seat 3 and one backrest 4 as a representative.

The seat 3 and the backrest 4 are attached to the underframe 2 so as to be freely movable between the upright position shown in FIG. 1A and the reclining position shown in FIG. 1B. The leg rest is attached to the seat part 3 so that it can move freely between the storage position shown in FIG. 1A and the expanded position shown in FIG. 1B. The leg rest drive mechanism 6 is a mechanism that performs the operation of moving the leg rest 5 from the storage position to the expanded position and the operation of moving the leg rest 5 from the expanded position to the storage position, and transmits its operating force to the leg rest 5 so that the leg rest 5 is removed from the storage position. The position moves to the expanded position and from the expanded position to the storage position.

As shown in Figures 2 and 3, 5, etc., the underframe 2 has: a pair of underframe side tubes 21; a front bar 22 of the underframe; a rear bar 23 of the underframe; There are a pair of guide plates 24; and a pair of guide rails 25 are respectively provided with respect to a seat 3 and a backrest 4 (FIG. 5).

As shown in FIGS. 2 and 3, the pair of chassis side tubes 21 are formed in a long rectangular tube shape, and are arranged such that the longitudinal direction is along the front-rear direction. The pair of chassis side pipes 21 are arranged to face the two seated persons in the left-right direction. The underframe front rod 22 connects the front ends of the pair of underframe side pipes 21 to each other and supports the underframe side pipe 21. The underframe rear rod 23 connects the rear ends of the pair of underframe side pipes 21 to each other and supports the underframe side pipe 21.

As shown in FIG. 2 and the like, the lower ends of the pair of guide plates 24 are attached to the rear rod 23 of the chassis. The pair of guide plates 24 are provided with guide grooves 24A and 24B into which guide pins P1 and P2 protruding outward in the left-right direction from the backrest 4 and the seat 3 described later are inserted. The guide pins P1 and P2 move along the aforementioned guide grooves 24A, 24B, so that the seat 3 and the backrest 4 are supported by the pair of guide plates 24 so as to be freely movable between the upright position and the reclining position. In the upright position, the seat 3 is located at the rear, and the backrest 4 is raised. In the reclining position, the seat 3 is located on the front side, and the backrest 4 is tilted.

As shown in FIG. 5, a pair of guide rails 25 are arranged side by side in the left-right direction above the front bar 22 of the chassis. A pair of guide rails 25 are respectively provided in the front-rear direction, and the shaft portion Z1 provided in the seat 3 runs on the guide rail 25, and the seat 3 is supported by the base frame 2 in a movable manner in the front-rear direction according to this.

The seat 3 includes a seat frame 31 that is configured to move freely in the front-rear direction relative to the base frame 2; and a cushioning material 32 (FIG. 1A and FIG. 1B) that is installed on the seat frame 31. As shown in Figures 2 and 3, the seat frame 31 has: a pair of seat frame side plates 311; a seat frame rear rod 312 (FIG. 2), the seat frame rear rod 312 connects the rear ends of the pair of seat frame side plates 311 to each other And the seat frame front rod 313 (Figure 3), the seat frame front rod 313 connects the front ends of a pair of seat frame side plates 311 to each other. The pair of seat frame side plates 311 are arranged on the inner side in the left-right direction than the pair of guide plates 24 and are arranged to face each other in the left-right direction. In addition, as shown in FIG. 2, a pair of seat frame side plates 311 has a side plate main body portion 311A, the side plate main body portion 311A is arranged so that the longitudinal direction is along the front-rear direction; a back frame support portion 311B, the back frame support portion 311B It extends from the rear end of the side plate main body portion 311A toward the rear and close to the upper oblique direction, and supports the back frame described later; and the leg rest support portion 311C, which is from the upper side of the front end of the side plate main body portion 311A It extends toward the front and supports the leg rest 5 described later.

As shown in FIG. 5, a pair of shaft parts Z1 which respectively walk on the said guide rail 25 respectively protrude inwardly from a pair of side plate main-body part 311A in the left-right direction. The back frame support portion 311B is provided with a through hole H1 into which a guide pin P1 protruding outward in the left-right direction from the back frame 41 is inserted. The guide pin P1 is inserted into the through hole H1, and accordingly, the back frame 41 is supported so as to be tiltable with respect to the seat frame 31 centering on the guide pin P1.

As shown in FIGS. 2 and 3, the seat frame rear rod 312 and the seat frame front rod 313 are connected between the pair of seat frame side plates 311 such that the longitudinal direction is along the left-right direction. The front rod 313 of the seat frame is installed to freely rotate between a pair of side plates 311 of the seat frame.

The backrest 4 includes a back frame 41 that is installed to tilt freely relative to the seat frame 31 and a cushioning material 42 (FIG. 1) that is installed on the back frame 41. As shown in FIG. 2, the back frame 41 has a pair of side plate portions 411 arranged between the pair of guide plates 24, an upper plate portion 412, and a center plate portion 413. The pair of side plate portions 411 are arranged to face each other in the same direction as the pair of guide plates 24, and the longitudinal direction is arranged along the up-down direction. The lower ends of the pair of side plate portions 411 overlap the inner side of the aforementioned back frame support portion 311B. The guide pins P1 and P2 are attached to the side plate portion 411 so as to protrude outward in the left-right direction.

The upper plate portion 412 connects the upper ends of the pair of side plate portions 411 to each other, and is arranged such that the longitudinal direction is along the left-right direction. The center plate part 413 connects the center of a pair of side plate part 411, and is arrange|positioned so that the longitudinal direction may follow the left-right direction. In the present embodiment, three central plate portions 413 are arranged in the vertical direction.

The leg support 5 is rotatably mounted on the seat frame between the storage position hanging down from the front end of the seat frame 31 as shown in FIG. 1A and the unfolding position extending forward from the front end of the seat frame 31 as shown in FIG. 1B 31. The leg support 5 has: a leg support frame 51; and a cushioning material 52 attached to the leg support frame 51 (FIG. 1A and FIG. 1B ). As shown in FIG. 2, the leg support frame 51 includes a pair of side frame portions 511 that face each other in the left-right direction; a connecting portion 512 that connects the pair of side frame portions 511; and a plate portion 513.

The pair of side frame portions 511 are formed in an approximately square column shape, and one end in the longitudinal direction is axially supported by the leg rest support portion 311C of the seat frame 31. According to this, the leg support frame 51 can rotate freely with respect to the seat frame 31. The connecting portion 512 is formed in an approximately square column shape and is arranged such that the longitudinal direction is along the left-right direction. Both ends of the connecting portion 512 are connected to the pair of side frame portions 511. The plate portion 513 is arranged between a pair of side frame portions 511 lower than the connecting portion 512 at the storage position, is perpendicular to the front-rear direction at the storage position, and perpendicular to the up-down direction at the expanded position.

The leg rest drive mechanism 6 includes an operating mechanism 7, a drive mechanism 8, and a lock mechanism 9. As shown in Figure 3, the operating mechanism 7 is installed on one of the pair of underframe side tubes 21 (in this embodiment, the operating mechanism 7 of the seat device 1 on the left is installed on the underframe side tube 21 on the left, and the seat on the right The operating mechanism 7 of the device 1 is attached to the chassis side tube 21 on the right side), and the rotating shaft 11 (FIGS. 7 and 8) is rotated in one direction Y1 in accordance with the operation of the operating lever 10 as the operating portion. In addition, in this embodiment, one direction Y1 is the clockwise direction in FIG. 3.

As shown in Figures 5 and 6, the drive mechanism 8 is installed in the center of the seat frame front rod 313 of the seat frame 31, and transmits the rotation of the rotating shaft 11 in one direction Y1 to the leg rest 5 to drive the leg rest 5 from the storage position To the expanded position. As shown in FIG. 4, the locking mechanism 9 is mounted on the other side of the pair of seat frame side plates 311 (in this embodiment, the locking mechanism 9 of the seat device 1 on the left is mounted on the seat frame side plate 311 on the right, and the seat on the right is The locking mechanism 9 of the device 1 is installed on the side plate 311 of the left side of the seat frame, and the rotation of the rotating shaft 11 in the other direction Y2 is prohibited. In addition, in this embodiment, the other direction Y2 is the counterclockwise direction in FIG. 3 and is the clockwise direction in FIG. 4.

As shown in Figures 6, 7 and 8, the operating mechanism 7 has: an operating lever 10 to rotate the operating lever 10; a rotating shaft 11 (Figures 7 and 8) to rotate the operating lever 10 Operation causes the rotating shaft 11 to rotate; as the first gear 12 of the transmission mechanism, when the first gear 12 rotates, the rotating shaft 11 rotates in conjunction; as the first locking portion 13 of the transmission mechanism, the first locking The portion 13 is locked to the first gear 12, so that the first gear 12 is rotated in accordance with the rotating operation of the operating lever 10; the pin P3 (FIG. 7 and FIG. 8) as a restricting portion; the third gear 14 and the first tooth The bar 15, the third gear 14 and the first rack 15 convert the rotational force of the rotating shaft 11 into movement in the front-rear direction; and a supporting portion 16 that supports the aforementioned components.

The operating rod 10 is formed in a long strip shape, and the rotating shaft 11 penetrates one end of the operating rod 10. The operating lever 10 is not fixed to the rotating shaft 11, and is provided so that the rotating shaft 11 can swing (rotate) freely with respect to the center. The operating lever 10 abuts against a first stopper S1 and a second stopper S2 as a stopper provided on the support portion 16 described later to limit the swing range. The other end of the operating lever 10 is more than the seat frame 31 Swing in the upward protruding range.

The rotating shaft 11 is rotatably supported by a supporting portion 16 described later such that its axial direction is along the left-right direction. The rotating shaft 11 penetrates the first gear 12. The first gear 12 is fixed to the rotation shaft 11 on the inner side of the left and right direction than the operating lever 10. When the first gear 12 rotates, the rotation shaft 11 also rotates in the same direction in conjunction with the rotation of the first gear 12. As shown in FIGS. 9A and 9B, the inclined surface M1 on the Y1 side of the teeth of the first gear 12 in one direction than the top is set to be gentler than the locking surface M2, and the locking surface M2 is positioned in the other direction than the top Y2 side.

As shown in FIG. 6, FIG. 7, and FIG. 8, the first locking portion 13 is attached so that the front end thereof can swing freely with respect to the inner side of the operation lever 10 about the axis along the left-right direction. The rear end of the first locking portion 13 protrudes further rearward than the operating lever 10 and is located above the first gear 12. The first locking portion 13 is formed with a claw portion 13A protruding toward the teeth of the first gear 12 at its rear end. The claw portion 13A of the first locking portion 13 is urged in a direction approaching the first gear 12 by a coil spring or the like, not shown, so that the claw portion 13A is in contact with the first gear 12.

As shown in FIG. 9A and FIG. 9B, the end surface M3 of the claw portion 13A that is more forward than the top portion thereof is provided at an angle that is substantially the same as the engagement surface M2 of the teeth of the first gear 12. In addition, the inclined surface M4 of the claw portion 13A rearward of the top portion is provided at an angle that is substantially the same as the inclined surface M1 of the teeth of the first gear 12. Accordingly, as shown in FIG. 9A, if the first locking portion 13 moves in one direction Y1, the end surface M3 of the first locking portion 13 and the locking surface M2 of the first gear 12 are locked to make the first gear 12 Rotate in one direction Y1. On the other hand, as shown in FIG. 9B, if the first locking portion 13 is moved in the other direction Y2, the claw portion 13A of the first locking portion 13 is in sliding contact with the inclined surface M1 of the first gear 12 while being moved. Gradually press upwards over the teeth of a gear 12. Therefore, the first gear 12 is not locked with the first locking portion 13, and the first gear 12 does not rotate.

The pin P3 is protrudingly provided below the first locking portion 13. As shown in FIG. 7, when the operating lever 10 is in the initial position in contact with the second stopper S2, the pin P3 presses the first locking portion 13 upward to make the claw portion 13A of the first locking portion 13 And the first gear 12 is separated.

As shown in FIG. 6, the third gear 14 is penetrated by the rotating shaft 11. The third gear 14 is fixed to the rotating shaft 11 between the first gear 12 and the operating lever 10. When the rotating shaft 11 rotates, the third gear 14 also rotates in the same direction in conjunction with the rotation of the rotating shaft 11.

The first rack 15 is arranged below the third gear 14 to mesh with the third gear 14 and is slidably supported by the support part in the front-rear direction. Accordingly, when the third gear 14 rotates in one direction Y1, the first rack 15 moves forward, and when the third gear 14 rotates in the other direction Y2, the first rack 15 moves backward. On the lateral outer side of the first rack 15 in the left-right direction, a mounting pin P4 to which one end of the inner wire W1 of the cable C1 described later is attached to is protrudingly provided.

As shown in FIG. 6, the supporting portion 16 has a first supporting plate 161 and a second supporting plate 162 formed by stamping a metal plate. The first support plate 161 has a substantially rectangular bottom plate 161A elongated in the front-rear direction, and a substantially rectangular rising plate 161B erected upward from the inner end of the bottom plate 161A in the left-right direction. The rotating shaft 11 is rotatably attached to the rising plate 161B. In addition, the upright plate 161B is provided with: a first stopper S1 that abuts on the operating rod 10 and restricts the rotation of the operating rod 10 in one direction Y1; and a second stopper S2, The second stopper S2 abuts on the operating lever 10 and restricts the rotation of the operating lever 10 in the other direction Y2. The rising plate 161B is provided with a convex portion 161C erected upward from the rear side of the upper end thereof, and the first stopper S1 is erected from the upper side of the front end of the convex portion 161C toward the outer side in the left-right direction. The second stopper S2 is erected from the upper side of the front end of the rising plate 161B toward the outer side in the left-right direction.

The second support plate 162 has: an approximately rectangular bottom plate 162A extending in the front-rear direction; an approximately rectangular rising plate 162B that is erected upward from the inner end of the bottom plate 162A in the left-right direction; and approximately A rectangular rising plate 162C is erected upward from an outer end of the bottom plate 162A in the left-right direction. The bottom plate 162A is formed with a slit SL into which the rising plate 161B of the aforementioned first support plate 161 is inserted. When the upright plate 161B of the first support plate 161 is inserted into the slit SL, the upright plate 161B is erected from the bottom plate 162A, and the upright plates 161B and 162B are arranged at intervals in the left-right direction. In a state where the underframe side tube 21 is sandwiched between the upright plates 161B and 162B, the support portion 16 is fixed to the underframe side tube 21. In addition, the above-mentioned first rack 15 is arranged on the bottom plate 162A between the upright plates 162B and 162C.

As shown in FIG. 5, the driving mechanism 8 includes: a second rack 81 that moves in the front-rear direction in conjunction with the first rack 15; The two racks 81 are supported to move freely in the front and rear directions; the cable support plate 83 supports the cable C1 that transmits the movement of the first rack 15 to the second rack 82; the fourth gear (Not shown), transmitting the movement of the second rack 82 to the front rod 313 of the seat frame to rotate the fourth gear; The movement of the two racks 82 is transmitted to the connection part 512 of the leg support 5, and the leg support 5 rotates.

The second rack 81 is disposed below the front rod 313 of the seat frame, and is movably supported by the rack support portion 82 in the front-rear direction. The rack support portion 82 is fixed to the front rod 313 of the seat frame. The rack support portion 82 has a bottom plate 821 on which the second rack 81 is mounted, and a pair of upright plates 822 that are erected upward from both ends of the bottom plate 821 in the left-right direction. The front rod 313 of the seat frame penetrates the aforementioned pair of upright plates 822. In addition, pins (not shown) protruding inward in the left-right direction are attached to the pair of upright plates 822, respectively. A guide groove 81A along the front-rear direction is provided on the side surface of the second rack 81, and the above-mentioned pin is inserted into the guide groove 81A of the second rack 81. According to this, the second rack 81 is supported by the rack support portion 82 movably in the front-rear direction.

One end is attached to the inner wire W1 of the first rack 15 and the other end is attached to the rack support portion 82. The cable support plate 83 is fixed to the rear end of the second rack 81 with screws or the like. The other end of the housing OC1 of the cable C1 is supported by the cable support plate 83.

The not-shown fourth gear is penetrated by the seat frame front rod 313 and is arranged to be sandwiched by a pair of upright plates 822. The fourth gear is arranged above the second rack 81 and meshes with the second rack 81. Accordingly, when the second rack 81 moves forward, the fourth gear rotates in one direction Y1, and when the second rack 81 moves backward, the fourth gear rotates in the other direction Y2. The front rod 313 of the seat frame is fixed to the fourth gear. If the fourth gear rotates, the front rod 313 of the seat frame also rotates in the same direction.

As shown in FIG. 4, the pair of link parts 84 are arrange|positioned so that the space|interval is spaced apart in the left-right direction. The pair of link portions 84 are locked on the lower side of the connecting portion 512. The front end of the second rack 81 is sandwiched between the pair of link portions 84. The pair of link portions 84 supports the second rack 81 so as to be rotatable about an axis along the left-right direction. Accordingly, when the second rack 81 moves forward, the link portion 84 rotates about the axis, so that the connecting portion 512 rotates in one direction Y1, and the leg rest 5 rises toward the deployed position.

As shown in Figures 10 and 11, the locking mechanism 9 includes: a second gear 91 that is linked to the seat frame front rod 313; and a second locking portion 92 that is locked to The second gear 91 prohibits the rotation of the rotating shaft 11 in the other direction Y2; the coil spring Co (Co1); the link portion 93; the cable support portion 94; and the pin P5.

The second gear 91 is penetrated by the front rod 313 of the seat frame. The second gear 91 is fixed to the front rod 313 of the seat frame. If the front rod 313 of the seat frame rotates, the second gear 91 also rotates in the same direction in conjunction with the rotation of the front rod 313 of the seat frame. As shown in FIGS. 12A and 12B, the inclined surface M5 of the teeth of the second gear 91 in a direction Y1 closer to the top is set to be gentler than the locking surface M6, and the locking surface M6 is larger than the teeth of the second gear 91 The top is closer to the other direction Y2.

As shown in FIGS. 10 and 11, the front end of the second locking portion 92 is attached to the outer surface of the seat frame side plate 311 so as to be swingable around the axis Z2 along the left-right direction. The rear end of the second locking portion 92 is located above the second gear 91. The second locking portion 92 is formed with a claw portion 92A protruding toward the teeth of the second gear 91 at its rear end. As shown in FIG. 12, the end surface M7 of the claw portion 92A that is rearward of the top portion thereof is provided at an angle that is substantially the same as the engagement surface M6 of the teeth of the second gear 91. In addition, the inclined surface M8 of the claw portion 92A that is further forward than the top portion is provided at an angle that is substantially the same as the inclined surface M5 of the teeth of the second gear 91.

Accordingly, as shown in FIG. 12A, when the second gear 91 is to be rotated in the other direction Y2, the end surface M7 of the second locking portion 92 and the locking surface M6 of the second gear 91 are locked to prohibit the second gear 91 rotates in the other direction Y2. On the other hand, as shown in FIG. 12B, when the second gear 91 rotates in one direction Y1, the claw portion 92A of the second locking portion 92 is gradually pressed upward while slidingly contacting the inclined surface M5 of the second gear 91 The teeth of the second gear 91 are passed, and therefore, the rotation of the second gear 91 in one direction Y1 is allowed.

As shown in FIGS. 10 and 11, one end of the coil spring Co1 is attached to the second locking portion 92, and the other end is attached to the link portion 93 described later. The coil spring Co1 urges the pawl portion 92A in a direction approaching the second gear 91, so that the pawl portion 92A is in contact with the second gear 91.

The link portion 93 is attached so as to be rotatable on the outer surface of the seat frame side plate 311 with the axis Z3 along the left-right direction as the center. The link portion 93 is arranged on the inner side of the second locking portion 92 in the left-right direction. In the link portion 93, the pin P5 protrudes outward in the left-right direction. When the force of the cable C2 is transmitted to the link portion 93, the link portion 93 rotates in one direction Y1 with the axis Z3 as the center, so that the pin P5 moves from The lock position shown in FIG. 10 moves to the release position shown in FIG. 11. At the locked position, the pin P5 does not exert a force on the second locking portion 92, and the second locking portion 92 is in a position in contact with the second gear 91. The release position of the pin P5 is located above the locked position. At the release position, the pin P5 presses the claw portion 92A of the second locking portion 92 upward to separate the second locking portion 92 and the second gear 91.

The link part 93 has two branch parts 93A, 93B which branch into two branches in the up-down direction on the front side. A shaft Z3 is provided in the lower bifurcated portion 93B. The pin P5 protrudes forward from the axis Z3 of the bifurcated portion 93B, and is arranged below the second locking portion 92. The above-mentioned coil spring Co1 is attached to the front end of the two forked portions 93A on the upper side.

One end of the inner wire (not shown) of the cable C2 is attached to the rear end of the link part 93. The cable support portion 94 is attached to the seat frame side plate 311 to be more rearward than the link portion 93, and one end of the housing OC2 of the cable C2 is attached to the cable support portion 94.

The other end of the above-mentioned cable C2 is connected to the above-mentioned operating rod 10. Next, the details of the operation lever 10 described briefly above will be described. As shown in FIGS. 3, 4, 7 and 8, the operating lever 10 has: a lever main body portion 101 as a main body; an operating piece 102 that is provided to swing freely with respect to the lever main body portion 101; Coil spring Co2 that energizes it to swing in one direction Y1 (Figure 13). When the operating piece 102 swings in one direction Y1 with respect to the lever main body 101, it abuts on the lever main body 101, and the lever main body 101 also rotates in one direction Y1. In addition, when the operating piece 102 swings in the other direction Y2, as shown by the broken line in FIG. 7, it swings in the other direction Y2 with respect to the lever main body 101. The swing of the operating piece 102 in the other direction Y2 is transmitted to the locking mechanism 9 by the cable C2, so that the locking of the second locking portion 92 and the second gear 91 is released.

The lever main body portion 101 is provided in a plate shape arranged perpendicular to the left-right direction, and is divided into two parts, a first main body portion 101A and a second main body portion 101B connected in the longitudinal direction. The rotating shaft 11 is attached to the first main body portion 101A. The second main body portion 102 (101B) is installed at the end of the first main body portion 101 (101A) on the side away from the rotating shaft 11 in the longitudinal direction, and is installed to be inclined more rearward than the first main body portion 101 (101A) . The second main body portion 101B has: a main body upper portion 101C that protrudes forward above the second main body portion 101B; and an operation piece support portion 101D that extends from the lower end of the main body upper portion 101C The front protrudes. Moreover, as shown in FIG. 13, the cable/coil support part 101E which supports the cable C2 and the coil spring Co2 is provided in the 2nd main body part 101B. The housing OC2 of the cable C2 is supported by the cable/coil support part 101E. In addition, one end of the coil spring Co2 is supported by the cable/coil support portion 101E.

As shown in FIG. 13, the operating piece 102 has: an operating piece main body 102A operated by a seated person; a main body support portion 102B supported by the lever main body portion 101; and a cable/ Coil support part 102C. The operation piece main body 102A is formed in a plate shape, and as shown in FIGS. 4 and 13, the operation piece main body 102A is arranged so as to be orthogonal to the lever main body 101 on the inner side in the left-right direction and in front of the main body upper portion 101C. As shown in FIG. 13, the main body support part 102 (102B) protrudes rearward from the operation piece main body 102, overlaps with the left-right direction inner side of the operation piece support part 101D, and is attached so as to be rotatable about the axis Z4. The cable/coil support portion 102C protrudes rearward from a position higher than the main body support portion 102B of the operation piece main body 102. The inner wire material of the cable C2, which is not shown, and the other end of the coil spring Co2 are attached to the cable/coil support part 102C.

The aforementioned coil spring Co2 is installed between the lever main body 101 and the operating piece 102 in the aforementioned manner, and urges the operating piece 102 to swing in one direction Y1. According to this, as shown by the solid line in FIG. 13, the operation piece 102 is urged in a direction approaching the front end of the upper main body portion 101C and abuts against the front end of the upper main body 101C.

Next, the operation of the seat device 1 of the aforementioned structure will be described. First, as shown in FIG. 1A, the leg rest 5 is placed in the storage position. In a state where the seated person is not operating the operating lever 10, the operating piece 102 is in the initial position shown by the solid line in FIG. 7 due to the urging force of the coil spring Co2. In addition, the lever main body 101 is in an initial position in contact with the second stopper S2. When the seated person operates the upper end of the operation piece 102 toward the rear, the lever main body 101 is pressed by the operation piece 102 and rotates in one direction Y1.

When the lever main body 101 is rotated in one direction Y1, as shown in FIG. Rotate in one direction Y1. When the first gear 12 rotates in one direction Y1, the first rack 15 moves forward. The forward movement of the first rack 15 is transmitted by the cable C1, and the second rack 82 moves forward. The forward movement of the second rack 82 is transmitted to the connecting portion 512 of the leg rest 5 via the link portion 84, so that the connecting portion 512 rotates in one direction Y1. Accordingly, the leg support 5 rises toward the deployed position.

When the second rack 82 moves forward, the third gear 14 meshing with the second rack 82 rotates in one direction Y1. The front rod 313 of the seat frame to which the third gear 14 is fixed also rotates in one direction Y1 in conjunction with the rotation of the third gear 14 in one direction Y1. The second gear 91 of the locking mechanism 9 fixed to the front rod 313 of the seat frame also rotates in one direction Y1 in conjunction with the rotation of the front rod 313 of the seat frame 313 in one direction Y1. When the second gear 91 rotates in one direction Y1, as shown in FIG. 12B, the claw portion 92A of the second locking portion 92 is gradually pressed upward while slidingly contacting the gentle inclined surface M8 of the second gear 91 and passes over The teeth of the first gear 91. That is, the second locking portion 92 allows the rotation of the second gear 91 in one direction Y1.

When the seated person removes his hand from the operating lever 10, the operating lever 10 rotates in the other direction Y2 due to the urging force of a coil spring (not shown) or the like. If the operating lever 10 is rotated in the other direction Y2, as shown in FIG. 9B, the first locking portion 13 is gradually pressed upward while slidingly in contact with the gentle inclined surface M1 of the first gear 12 and passes over the first gear. 12 teeth. Accordingly, the rotational force of the operating lever 10 in the other direction Y2 is not transmitted to the second gear 12, and therefore, the leg rest 5 is not returned to the storage position due to the rotation of the operating lever 10 in the other direction Y2.

In addition, if the seated person removes the hand from the operating lever 10 in the aforementioned manner, the leg rest 5 will return to the storage position due to its own weight, so that the second rack 81 will move backward. If the second rack 81 is to move rearward, the fourth gear (not shown) meshing with the second rack 81 is rotated in the other direction Y2, so that the front rod 313 of the seat frame and the second gear 91 also need to be in contact with each other. The fourth gear rotates in the other direction Y2 in conjunction with the rotation in the other direction Y2. If the second gear 91 rotates in the other direction Y2, as shown in FIG. 12A, the end surface M7 of the second locking portion 92 and the locking surface M6 of the second gear 91 are locked without causing the second gear 91 to face Rotate in the other direction Y2. That is, the second locking portion 92 prohibits the rotation of the second gear 91 in the other direction Y2. According to this, even if the seated person removes the hand from the pole, the leg rest 5 does not return to the storage position due to its own weight.

As shown by the broken line in FIG. 7, if the operation piece 102 is tilted forward, the operation piece 102 rotates in the other direction Y2 with respect to the lever main body 101. At this time, the lever main body 101 does not rotate. The rotation of the operating piece 102 in the other direction Y2 is transmitted to the link part 93 of the lock mechanism 9 via the cable C2, and as shown in FIG. 11, the link part 93 is rotated in the other direction Y2. Accordingly, the pin P5 presses the second locking portion 92 upward to separate the second locking portion 92 and the second gear 91. Therefore, the rotation of the second gear 91 in the other direction Y2 is allowed, and therefore, the leg rest 5 returns to the storage position due to its own weight.

According to the foregoing embodiment, the first gear 12 and the first locking portion 13 constituting the transmission mechanism transmit the rotational force of the operating lever 10 in one direction Y1 to the rotating shaft 11, and the rotational force of the operating lever 10 in the other direction Y2 is not Transmitted to the rotating shaft 11. Therefore, by repeating the rotation of the operating lever 10 in one direction Y1 and the rotation in the other direction Y2, the rotation shaft 11 can be rotated in one direction Y1 to drive the leg rest 5 accordingly. According to this, even if the rotation range of the operation lever 10 is narrow, the operation amount of the operation lever 10 can be sufficiently increased compared to the drive amount of the leg rest 5. Therefore, the operation lever 10 can be rotated with a lighter force to align the legs. Support to drive.

According to the aforementioned embodiment, it is possible to easily configure the transmission mechanism using the ratchet structure including the first gear 12 and the first locking portion 13.

In particular, the seated person operates the operating lever 10 in a state where the foot is placed on the leg rest. Therefore, if the operating lever 10 is heavy, the seated person steps on the leg support 5 to press the leg support 5 back to the storage position. Therefore, the operating lever 10 becomes heavier. According to the seat device 1 of the present embodiment, the operating rod 10 is rotated with a lighter force. Therefore, the seated person does not need to place the foot on the leg rest to pedal, and the effect is better.

In addition, according to the foregoing embodiment, the lock mechanism 9 allows the rotation of the rotating shaft 11 in one direction Y1 (=allows driving to the unfolded position of the leg rest 5), and prohibits the rotation of the rotating shaft 11 in the other direction Y2 (= prohibits Driving of the storage position of the leg rest 5). Accordingly, while the operating lever 10 is rotated in the other direction Y2, the rotating shaft 11 does not rotate in the other direction Y2 and returns to the deployed position.

In addition, according to the foregoing embodiment, the locking mechanism 9 has: a second gear 91 that is linked to the rotating shaft 11; and a second locking portion 92 that engages the second gear 91 For locking, the second gear 91 and the second locking portion 92 have a ratchet structure: if the rotating shaft 11 rotates in one direction Y1, the second locking portion 92 is not locked to the second gear 91 and allows the rotation of the rotating shaft 11 When the rotating shaft 11 rotates in the other direction Y2, the second locking portion 92 is locked to the second gear 91 and the rotation of the rotating shaft 11 is prohibited. Therefore, it is possible to easily provide the lock mechanism 9 that allows the rotation of the rotating shaft 11 in only one direction Y1 by using the ratchet structure.

In addition, according to the aforementioned embodiment, if the operating piece 102 swings in one direction Y1, it abuts against the lever main body portion 101 so that the lever main body portion 101 also rotates in one direction Y1. If the operating piece 102 swings in the other direction Y2, it will be relatively The lever main body 101 swings in the other direction Y2, and the lock mechanism 9 is released. According to this, the operation for driving the leg rest 5 and the unlocking operation of the lock mechanism 9 can be performed using one operation piece 102.

Furthermore, according to the aforementioned embodiment, when the operating lever 10 is rotated in the other direction Y2 to return to the initial position where it abuts against the second stopper S2, the pin P3 comes into contact with the first locking portion 13 and contacts the second stopper S2. A gear 12 is separated. Accordingly, when the operating lever 10 is in the initial position, the first locking portion 13 and the first gear 12 allow the rotation shaft 11 to rotate in the other direction Y2.

In addition, according to the foregoing embodiment, the elongated operating lever 10 is used as the operating portion, but it is not limited to this. As the operation part, as long as it can perform a rotation operation, it may be a disk shape.

Furthermore, according to the foregoing embodiment, the second gear 91 is mounted on the front rod 313 of the seat frame, but it is not limited to this. As the second gear 91, it only needs to be interlocked with the rotating shaft 11, and for example, it can be directly mounted on the rotating shaft 11 to achieve interlocking.

Furthermore, according to the aforementioned embodiment, the locking mechanism 9 is mounted on the side plate 311 of the seat frame where the operating mechanism 7 is not mounted, but it is not limited to this. As the locking mechanism 9, it can also be installed on the front rod 313 of the seat frame between a pair of side plates 311 of the seat frame.

Furthermore, according to the aforementioned embodiment, by oscillating the operating piece 102 to the lever main body 101, it is possible to use one operating piece 102 to perform the operation for driving the leg rest 5 and the unlocking of the lock mechanism 9 Operation, but not limited to this. Instead of providing the operating piece 102 on the operating lever 10, the release operating portion for releasing the lock mechanism 9 may be provided at a place different from the operating lever 10.

Furthermore, according to the aforementioned embodiment, the leg rest 5 is driven as a movable portion, but it is not limited to this. The seat frame 31 and the back frame 41 may be used as movable parts.

In addition, according to the foregoing embodiment, the rotation of the rotating shaft 11 is transmitted to the leg support 5 via the third gear 14, the first rack 15, the cable C1, and the link portion 84 to rotate the leg support 5, but it is not limited to this. The leg support 5 and the first gear 12 can also be installed on the front rod 313 of the seat frame, the front rod 313 of the seat frame is used as a rotation axis, and the rotation of the front rod 313 of the seat frame makes the mounting on the front rod 313 of the seat frame The leg rest 5 rotates.

(Second Embodiment) Hereinafter, the seat device of the second embodiment will be described with reference to FIGS. 14A to 19. In addition, the up, down, left, and right, front and back used in the following description refer to the up, down, left, and right, front and back as viewed from a seated person sitting on the seat device.

The seat device 100 of the present embodiment is a passenger seat installed in a passenger compartment of a vehicle such as a railway vehicle. As shown in FIGS. 14A and 14B, etc., the seat device 100 includes an underframe 200, a seat 300, a backrest 400, and a leg rest 500.

The underframe 200 is fixed on the rotating table and supports the seat 300 and the backrest 400. In this embodiment, two seat parts 300 and two backrests 400 are aligned and supported in the left-right direction with respect to one chassis 200. The seat 300 and the backrest 400 arranged on the left and right are substantially the same, so one seat 300 and one backrest 400 will be described as a representative.

The seat 300 and the backrest 400 are attached to the underframe 200 so as to be movable between the upright position shown in FIG. 14A and the reclining position shown in FIG. 14B. The leg rest is attached to the seat 300 so as to be freely movable between the storage position shown in FIG. 14A and the expanded position shown in FIG. 14B.

As shown in FIGS. 14A to 16 and so on, the base frame 200 includes: a pair of base frame side pipes 201 as side portions of the base frame; The seat 300 and the backrest 400 are respectively provided as a pair of guide plates 204 as side plates; and the guide rails 205 are provided as a pair of the seat 300 and the backrest 400 respectively.

As shown in FIG. 15 and FIG. 16, a pair of chassis side pipes 201 are formed in a long rectangular tube shape, and are arrange|positioned so that the longitudinal direction may follow the front-back direction. The pair of chassis side pipes 201 are arranged to face the two seated persons in the left-right direction. The underframe front rod 202 connects the front ends of the pair of underframe side pipes 201 to each other to support the underframe side pipe 201. The underframe rear rod 203 connects the rear ends of the pair of underframe side pipes 201 to each other to support the underframe side pipe 201.

The lower ends of the pair of guide plates 204 are mounted on the rear rod 203 of the chassis. The pair of guide plates 204 are respectively provided with a pair of guide grooves 204A into which guide pins 600 protruding outward in the left-right direction from the backrest 400 and the seat 300 described later are inserted. The guide pin 600 moves along the guide groove 204A, and the seat 300 and the backrest 400 are supported by the pair of guide plates 204 so as to be freely movable between the upright position and the reclining position. In the upright position, the seat 300 is located at the rear, and the backrest 400 stands up. In the reclining position, the seat 300 is located on the front side, and the backrest 400 is tilted.

As shown in FIG. 16, a pair of guide rails 205 are arranged side by side in the left-right direction above the front bar 202 of the chassis. The pair of guide rails 205 are respectively provided in a long plate shape, and are attached to the chassis front rod 202 such that the plate thickness direction is along the left and right direction, and the length direction is along the front and rear direction. The pair of guide rails 205 are attached to the base frame front rod 202 so that the rear end protrudes more rearward than the base frame front rod 202 and the front end protrudes slightly forward than the base frame front rod 202.

The traveling shaft 303 provided in the seat part 300 travels on the guide rail 205, and accordingly the seat part 300 is supported by the base frame 200 so as to be freely movable in the front-rear direction. In addition, a convex portion 205A protruding upward is provided at the tip of the guide rail 205. The traveling shaft 303 of the seat portion 300 cannot exceed the convex portion 205A and travel forward.

The seat 300 includes a seat frame 301 that is configured to move freely in the front-rear direction relative to the base frame 200; As shown in FIG. 15, the seat frame 301 has: a pair of seat frame side plates 3011; a seat frame rear rod 3012 that connects the rear ends of the pair of seat frame side plates 3011 to each other; and a seat frame front rod 3013 The seat frame front rod 3013 connects the front ends of the pair of seat frame side plates 3011 to each other. The pair of seat frame side plates 3011 are arranged on the inner side in the left-right direction than the pair of guide plates 204 and are arranged to face each other in the left-right direction. In addition, as shown in FIG. 15, a pair of seat frame side plates 3011 has: a side plate main body portion 3011A, the side plate main body portion 3011A is arranged so that the longitudinal direction is along the front-rear direction; a back frame support portion 3011B, the back frame support portion 3011B follows from The rear end of the side plate main body 3011A extends in an oblique direction close to the upper direction toward the rear, and supports a back frame 401 described later; and a leg rest support portion 3011C, which is separated from the front end of the side plate main body 3011A The upper side extends toward the front, and supports the leg rest 500 described later.

As shown in FIG. 16, a pair of traveling shafts 303 respectively traveling on the aforementioned guide rail 205 protrude from the pair of side plate main body portions 3011A toward the inner side in the left-right direction. The traveling shaft 303 is provided in an approximately cylindrical shape, and has a pair of large-diameter portions 303A with a relatively large diameter, and a small-diameter portion 303B provided between the pair of large-diameter portions 303A. The guide rail 25 is sandwiched between a pair of large-diameter parts 303A, and the small-diameter part 303B runs on the guide rail 205.

The back frame support portion 3011B is provided with a through hole H1 into which the guide pin 600 protruding outward from the back frame 401 in the left-right direction is inserted. The guide pin 600 is inserted into the through hole H1, and according to this, the back frame 401 is supported so as to be able to tilt with respect to the seat frame 301 with the guide pin 600 as the center.

The backrest 400 includes: a back frame 401 that is installed to tilt freely relative to the seat frame 301; and a cushioning material 402 (FIG. 14A and FIG. 14B) that is installed on the back frame 401. As shown in FIG. 15, the back frame 401 has a pair of side plate portions 4011 arranged between the pair of guide plates 204, an upper plate portion 4012, and a center plate portion 4013. The pair of side plate portions 4011 are arranged to face each other in the same direction as the pair of guide plates 204, and the longitudinal direction is arranged along the up-down direction. The lower ends of the pair of side plate portions 4011 overlap the inner side of the aforementioned back frame support portion 3011B. The guide pin 600 is attached to the side plate portion 4011 so as to protrude outward in the left-right direction.

The upper plate portion 4012 connects the upper ends of the pair of side plate portions 4011 to each other, and is arranged such that the longitudinal direction is along the left-right direction. The center plate portion 4013 connects the centers of the pair of side plate portions 4011 to each other, and is arranged such that the longitudinal direction is along the left-right direction. In the present embodiment, three central plate portions 4013 are arranged side by side in the vertical direction.

The leg support 500 is rotatably installed between the storage position hanging down from the front end of the seat frame 301 as shown in FIG.座架301。 Block 301.

Next, the detailed structure of the aforementioned guide pin 600 will be described. As shown in FIG. 15, two guide pins 600 are mounted up and down with respect to the pair of side plate portions 4011, respectively. That is, in this embodiment, four guide pins 600 are attached to the pair of side plate portions 4011. The upper guide pin 600 is inserted above the pair of guide grooves 204A provided on the guide plate 204. The lower guide pin 600 is inserted into the through hole H1 (FIG. 16) of the seat frame 301 in the lower part of the pair of guide grooves 204A provided on the guide plate 204.

As shown in FIG. 18, the guide pin 600 includes a first pin portion 601, a second pin portion 602, and a spacer 603. The first pin portion 601 has: a first shaft portion 601A that penetrates the back frame 401 and the guide groove 204A; and a first flange portion 61B that is provided on the first shaft portion 601A The inner end (one end) in the left-right direction of the device is overlapped and fixed to the back frame 401. The first shaft portion 601A is divided in the axial direction (left-right direction) into a back frame shaft portion 61C penetrating the back frame 401 and a chassis shaft portion 601D inserted into the guide groove 204A.

The back frame shaft portion 601C and the chassis shaft portion 601D are provided with through holes H2, H3 penetrating in the left-right direction, and a second shaft portion 602A described later is inserted into the through holes H2, H3. In this embodiment, the end surface of the back frame shaft portion 601C that is in contact with each other in the left-right direction and the end surface of the bottom frame shaft portion 601D in the left-right direction are substantially on the same plane as the inner surface of the guide plate 204 in the left-right direction. The method is divided into a back frame shaft portion 601C and a chassis shaft portion 601D.

The first flange portion 601B protrudes in the radial direction from an inner end portion in the left-right direction of the back frame shaft portion 601C, and overlaps the inner side of the back frame 401. The first flange portion 601B and the back frame shaft portion 601C are integrally provided. The first flange portion 601B is formed with a through hole H4 through which a screw N1 for fixing the guide pin 600 to the back frame 401 penetrates. The back frame 401 is provided with a screw hole H5 to be screwed with the screw N1. In a state where the screw N1 is inserted into the through hole H4 of the first flange portion 601B, the screw N1 is screwed into the screw hole H5 provided in the back frame 401, whereby the guide pin 600 can be fixed to the back frame 401. The first flange portion 601B is provided in an elongated shape, and a through hole H4 is formed on the side away from the through hole H2.

The second pin portion 602 has: a second shaft portion 602A that penetrates the through holes H2, H3 of the first shaft portion 601A; and a second flange portion 602B that is provided at The end portion (the other end) on the outer side in the left-right direction of the second shaft portion 602A overlaps with the end portion (the end of the chassis shaft portion 601D) on the outer side in the left-right direction of the first shaft portion 601A. The outer diameter of the second shaft portion 602A is set to be approximately the same as the diameter of the through holes H2, H3. If the second shaft portion 602A passes through the through holes H2, H3 of the first shaft portion 601A from the outside in the left-right direction, the second flange portion 602B abuts the end surface of the chassis shaft portion 601D, so that the second shaft portion 602A does not It falls off from the inner side in the left-right direction of the first shaft portion 601A. The second flange portion 602B is provided in a circular plate shape, and its diameter is set to be smaller than the outer diameter of the first shaft portion 601A.

In addition, at a position where the second flange portion 602B and the chassis shaft portion 601D abut, the front end of the second shaft portion 602A is provided to protrude further inward in the left-right direction than the first shaft portion 601A. A pin insertion hole H6 into which a locking pin 700 (FIG. 17) as an additional attachment portion is inserted is formed in a portion of the second shaft portion 602A that protrudes more than the first shaft portion 601A. The pin insertion hole H6 is penetratingly provided in the radial direction of the second shaft portion 602A, and the locking pin 700 protrudes from both ends of the pin insertion hole H6 in the penetrating direction. According to this, the locking pin abuts on the end surface of the first pin portion 601, so that the second shaft portion 602A does not fall off from the outer side of the first pin portion 601 in the left-right direction.

As shown in FIG. 18, the spacer 603, which is provided below and inserted into the guide pin 600 of the seat frame 301, is arranged between the seat frame 301 and the guide plate 204, and is provided with a through hole H7 penetrating the first shaft portion 601A. Two spacers 603 arranged below and inserted into the guide pins 600 of the seat frame 301 are arranged side by side in the left-right direction. On the other hand, as shown in FIG. 17, one spacer 603 provided above and not inserted into the guide pin 600 of the seat frame 301 is arranged between the seat frame 301 and the guide plate 204.

Next, the maintenance of the seat device 100 of the aforementioned structure will be described. The traveling shaft 303 provided in the seat frame 301 travels above the guide rail 205, thereby allowing the seat device 100 to move freely in the front and rear directions. As shown in FIG. 19, the seat frame 301 and the base frame 200 are not locked in the vertical direction. Therefore, if the front end of the seat frame 301 is raised, the seat frame 301 is centered on the guide pin 600 relative to the back frame 401. By rotating, the front end of the seat frame 301 can be easily raised upward. Accordingly, cleaning and maintenance of the lower side of the seat frame 301 can be easily performed.

In addition, if the four guide pins 600 are removed, the seat frame 301 and the back frame 401 can be removed from the chassis 200 for maintenance. The guide pin 600 can also be removed from both sides in the left-right direction.

First, the procedure for removing the guide pin 600 from the inner side in the left-right direction will be described. If the screw N1 is removed and the first pin portion 601 is pulled inward in the left-right direction, the first pin portion 601 and the second pin portion 602 can be pulled out from the guide groove 204A and the through hole H2 of the back frame 401. Accordingly, if the seat frame 301 and the back frame 401 are raised upward, they can be detached from the chassis 200.

Next, the procedure for removing the guide pin 600 from the outer side in the left-right direction will be described. The locking pin 700 is pulled out from the pin insertion hole H6 of the first shaft portion 601A. According to this, if the second pin portion 602 is pulled outward in the left-right direction, the second pin portion 602 can be extracted from the first pin portion 601. The first shaft portion 601A is divided into two parts, a back frame shaft portion 601C and a chassis shaft portion 601D. The back frame shaft portion 601C penetrates the back frame 401 but is not inserted into the guide groove 204A. The chassis shaft portion 601D is inserted into the guide groove 204A, but is not inserted into the back frame 401. Accordingly, if the seat frame 301 and the back frame 401 are raised upward, they can be detached from the chassis 200.

According to the aforementioned embodiment, the traveling shaft 303 provided in the seat frame 301 can move freely in the front-rear direction by traveling on the guide rail 205, and therefore, the seat frame 301 can be easily raised.

According to the foregoing embodiment, the guide rail 205 is supported above the front rod 202 of the chassis. According to this, the seat frame 301 can be stably supported so as to be freely movable in the front-rear direction.

According to the aforementioned embodiment, the base frame 200 has the guide plate 204 facing in the left-right direction, the guide plate 204 is provided with the guide groove 204A, and the back frame 401 is provided with the guide pin 600 inserted into the guide groove 204A. Then, the guide pin 600 moves along the guide groove 204A, so that the back frame 401 tilts in conjunction with the forward movement of the seat frame 301, and stands up in conjunction with the rearward movement of the seat frame 301. According to this, the back frame 401 can be tilted freely in conjunction with the movement of the seat frame 301 in the front-rear direction.

According to the foregoing embodiment, the guide pin 600 has: a first pin portion 601 having a first shaft portion 601A penetrating through the back frame 401 and the guide groove 204A, and one end portion provided on the first shaft portion 601A and The first flange portion 601B superimposed and fixed to the back frame 401; the second pin portion 602, the second pin portion 602 has a second shaft portion 602A penetrating the first shaft portion 601A, and another provided on the second shaft portion 602A One end and the second flange portion 602B overlapping the other end of the first shaft portion 601A; and a locking pin 700 that is provided at one end of the second pin portion 602 and prevents the second shaft portion 602A from being One shaft portion 601A falls off, and the first shaft portion 601A is divided into a back frame shaft portion 601C penetrating the back frame 401 and a chassis shaft portion 601D inserted into the guide groove 204A. According to this, the guide pin 600 can be removed from both one side and the other side in the left-right direction (axial direction).

In addition, according to the foregoing embodiment, the guide rail 205 is fixed to the front bar 202 of the chassis, but it is not limited to this. As long as the guide rail 205 is fixed above the base frame 200 that supports the seat frame 301, it may not be the base frame front rod 202. For example, it is also possible to arrange the central bar of the underframe between the front bar of the underframe and the rear bar of the underframe, to arrange the guide rail 205 above the central bar of the underframe, or to arrange the guide rail 205 on the side pipe of the underframe.

In addition, the aforementioned embodiment uses the guide pin 600 detachable from both sides in the left-right direction, but it is not limited to this. Ordinary guide pins that can be removed only from one side in the left-right direction can also be used.

In addition, the present invention is not limited to the aforementioned embodiment. That is, various modifications and implementations can be made without departing from the gist of the present invention.

The present invention claims the priority of Japanese patent application 2017-024205 filed on February 13, 2017 and Japanese patent application 2017-024206 filed on February 13, 2017, the entire contents of which are incorporated herein by reference middle.

1‧‧‧The seat device of the first embodiment 5‧‧‧Leg rest (movable part) 9‧‧‧Lock mechanism 10‧‧‧Operating lever (operating part) 11‧‧‧Rotating shaft 12‧‧‧First Gear (transmission mechanism) 13‧‧‧First locking part (transmission mechanism) 91‧‧‧Second gear 92‧‧‧Second locking part 101‧‧‧Lever body (main body) 102‧‧‧Operation P3‧‧‧Pin (restriction part) S2‧‧‧Second stopper (stopper) 100‧‧‧Second embodiment of the seat device 200‧‧‧Underframe 600‧‧‧Guide pin 700‧‧ ‧Locking pin (additional mounting part) 201‧‧‧Underframe side tube (underframe side) 202‧‧‧Underframe front rod (underframe connecting part) 204‧‧‧Guide plate (side plate) 204A‧‧‧ Guide groove 205‧‧‧Guide rail (track) 301‧‧‧Seat frame 303‧‧‧Walking axis 401‧‧‧Back frame 601‧‧‧First pin part 601A‧‧‧First shaft part 601B‧‧‧First Flange 601C‧‧‧Back frame shaft 601D‧‧‧Underframe shaft 602‧‧‧Second pin 602A‧‧‧Second shaft 602B‧‧‧Second flange

Fig. 1A is a side view showing one embodiment of the seat device of the present invention, which shows the seat device when the leg rest is in the storage position, and the seat and the backrest are in the upright position. Fig. 1B is a side view showing one embodiment of the seat device of the present invention, which shows the seat device when the leg rest is in the deployed position, the seat and the backrest are in the reclining position, and the leg rest drive mechanism is removed. Fig. 2 is a perspective view of the seat device shown in Fig. 1A after the cushioning material is removed from the front left. [Fig. 3] It is a perspective view of the seat device shown in Fig. 1A with the cushioning material removed from the rear left. [Fig. 4] is a perspective view of the seat device shown in Fig. 1A with the cushioning material removed from the rear right. Fig. 5 is a perspective view of a seat frame constituting the seat device shown in Fig. 1A. Fig. 6 is a perspective view of the seat frame and the leg rest driving mechanism constituting the seat device shown in Fig. 1A. [Fig. 7] A side view of the operating mechanism shown in Fig. 6 when the third gear is removed and the operating lever is in the initial position. Fig. 8 is a side view of the operating mechanism shown in Fig. 6 when the third gear is removed and the operating lever is slightly rotated in one direction. Fig. 9A is a partial enlarged view of the first locking portion and the first gear when the operating lever is rotated in one direction. Fig. 9B is a partial enlarged view of the first locking portion and the second gear when the operating lever is rotated in the other direction. Fig. 10 is a side view of the lock mechanism shown in Fig. 4 when the lock is not released. Fig. 11 is a side view of the lock mechanism shown in Fig. 4 when the lock is released. [Figure 12A] A partial enlarged view of the second locking portion and the second gear when the front rod of the frame is about to rotate in the other direction. [Fig. 12B] A partial enlarged view of the second locking portion and the second gear when the front rod of the seat frame is rotated in one direction. Fig. 13 is a partial side view of the operating lever shown in Fig. 1. Fig. 14A is a side view showing one embodiment of the seat device of the present invention, and shows the seat device when the seat portion and the backrest are in the upright position. Fig. 14B is a side view showing one embodiment of the seat device of the present invention, which shows the seat device when the seat portion and the backrest are in the reclining position. Fig. 15 is a perspective view of the seat device shown in Fig. 14A with the seat cushion removed from the front left. Fig. 16 is a perspective view of the underframe and the seat frame constituting the seat device shown in Fig. 14A. Fig. 17 is a perspective view of a part of the underframe and back frame constituting the seat device shown in Fig. 14A. Fig. 18 is a cross-sectional view taken along the line A-A in Fig. 15. Fig. 19 is a perspective view when the seat portion of the seat device shown in Fig. 14A is raised upward.

10‧‧‧Operation lever (operation part)

11‧‧‧Rotation axis

12‧‧‧The first gear

13‧‧‧The first locking part (transmission mechanism)

13A‧‧‧Claw

15‧‧‧First rack

51‧‧‧Leg Support Frame

101‧‧‧Pole main body (main body)

101A‧‧‧First main body

101B‧‧‧Second body

101C‧‧‧Upper part of the main body

101D‧‧‧Operation sheet support

102‧‧‧Operation film

161‧‧‧First support plate

162‧‧‧Second support plate

P3‧‧‧pin (restricted part)

P4‧‧‧Mounting pin

S1‧‧‧First stop

S2‧‧‧Second stop (stop)

311‧‧‧Side frame side panel

Claims (6)

A seat device is provided with: an operating portion for rotating the operating portion; a rotating shaft that rotates the rotating shaft by rotating the operating portion; and a movable portion that uses the rotational force of the rotating shaft to The movable portion is driven, and is characterized in that the seat device includes a transmission mechanism that transmits the rotational force of the operation portion to the rotation shaft, and the transmission mechanism transmits the rotation force of the operation portion in one direction to the rotation shaft, and The rotational force of the operating portion in the other direction is not transmitted to the rotating shaft; wherein, the transmission mechanism is a ratchet structure, and the ratchet structure includes a first gear that rotates the rotating shaft in conjunction with rotation when the first gear rotates And a first locking portion, the first locking portion is linked with the operating portion, when the operating portion rotates in one direction, the first locking portion is locked to the first gear so that the first gear faces When the operating part rotates in one direction, when the operating part rotates in the other direction, the first locking part is not locked to the first gear and does not cause the first gear to rotate in the other direction; the seat device also has: stop The stopper abuts the operating portion to restrict rotation in the other direction; and the restricting portion, when the operating portion is in the abutting position with the stopper, the restricting portion is in contact with the first card The stop portion comes into contact to separate the locking portion from the first gear. Such as the seat device described in item 1 of the scope of patent application, wherein the aforementioned movable portion is a leg rest. For example, the seat device described in item 1 or 2 of the scope of patent application also has a locking mechanism that allows the rotation of the rotation shaft in one direction and prohibits the rotation of the rotation shaft in the other direction. The seat device described in item 3 of the scope of patent application, wherein the locking mechanism is a ratchet structure, and the ratchet structure includes: a second gear that is linked with the rotation shaft; and a second locking portion, when When the rotating shaft rotates in one direction, the second locking portion is not locked by the second gear to allow the rotation of the rotating shaft. When the rotating shaft rotates in the other direction, the second locking portion It is locked by the second gear and prohibits the rotation of the rotation shaft. The seat device described in claim 3, wherein the operating portion has a main body and an operating piece provided to swing freely with respect to the main body, and the operating piece abuts against the main body when it swings in one direction. Then, the main body portion is also rotated in one direction, and the operation piece swings in the other direction relative to the main body portion when swinging in the other direction, and the locking mechanism is released. The seat device described in claim 4, wherein the operating portion has a main body and an operating piece provided to swing freely with respect to the main body, and the operating piece abuts against the main body when it swings in one direction. Then, the main body portion is also rotated in one direction, and the operation piece swings in the other direction relative to the main body portion when swinging in the other direction, and the locking mechanism is released.

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