JP4860387B2 - Convertible seat for vehicles - Google Patents

Description

  The present invention relates to a vehicle conversion seat applied to a vehicle such as a train, a train, or a bus, and in particular, the direction of the backrest is changed from one to the other by swinging the backrest. This is related to the vehicle conversion seat.

  In vehicles such as trains and trains, the direction of the seat is changed every time the traveling direction changes. That is, the inclination state of the backrest must be changed in accordance with the traveling direction of the vehicle. This is because the backrest must be positioned opposite the direction of travel so that the user can sit in the direction of travel. Of course, since the seat of a vehicle is used by an unspecified number of people, there are people who change in the direction opposite to the direction once changed, and when using multiple seats in a group, the user The direction of the seats may be changed so that two seats of multiple seats face each other (partial change).

As a method of changing the direction of the vehicle seat, there is a “rotating seat method” in which the entire seat is rotated, but this is not possible because it is necessary to secure a space that can rotate in a limited vehicle interior. It is not suitable for use by a specific large number of people. Therefore, as a vehicle seat that effectively uses a limited vehicle interior space, for example, “conversion seats” as shown in Patent Documents 1 to 3 have been proposed.
Japanese Utility Model Publication No. 35-28824 Japanese Utility Model Publication No.41-967 No. 01-34580

  As shown in FIG. 13, the conversion seat described in Patent Document 1 has a spring attached to each lower end of a back support (parallel) link that supports the back support. Thus, there is an advantage that the force when swinging the backrest from one side to the other side can be reduced, and it is considered that the conversion operation is easy.

  However, in the conversion seat of this patent document 1, since the seat cushion is fixed, it may be difficult for the user to take an easy posture. This is because, when a person sits down, if the part on which the knee is placed is higher than the part on which the hip is placed, the seat cushion is fixed.

  On the other hand, in the convertible seat of Patent Document 2, as shown in FIG. 14, the seat cushion has a structure that can tilt back and forth on the center line in the left-right direction, and the backrest link tilts to the right side in the figure. Then, since the right side of the seat cushion is depressed, it is possible to take an easy posture with the seat cushion.

  However, this time, the back link of Patent Document 2 has a structure that does not have the assistance of the spring as in Patent Document 1, so it is considered that the switching operability is bad.

  In addition to the above, in the convertible seat of Patent Document 2, it is considered that “impact sound generation at the time of conversion” has not been solved. That is, when the backrest is tilted to the opposite side, it is considered that a large impact sound such as “guttan” is generated in the convertible seat of Patent Document 2, and particularly when a large impact sound is generated when the backrest link is tilted. Conceivable. That is, the protruding shaft 12 on the left side of the figure employed in the convertible seat of Patent Document 2 is in a floating state without hitting the receiving portion 5, so that the fallen back link 19 is in a floating state. It is considered that a large impact sound hits the projecting shaft 12, and then the back support link 19 and the projecting shaft 12 hit the receiving portion 5 together to generate a large impact sound again.

  This “impact sound” is generated when the back link is raised from one side and tilted to the other side, and the contact between the back link and the projecting shaft, and the back link and the support stand. It is thought that there is something that occurs due to contact. In particular, when the back link comes into contact with the projecting shaft that is floating from the receiving portion, such as the projecting shaft shown on the left side of FIG. It is understood that a very loud impact sound is generated because it is not suppressed.

  As shown in Patent Document 1 and Patent Document 3 to be described later, the impact sound generated by the contact between the back support link and the receiving portion has a buffering function on the receiving portion on which the back support link contacts. Although it can be solved to some extent by providing a stopper having it, the above-mentioned Patent Document 2 does not provide any measures for preventing the generation of impact noise caused by contact between the back support link and the projecting shaft.

  In the “automatic conversion device” of Patent Document 3, as shown in FIG. 15, the formation of a comfortable posture by tilting the seat cushion and the generation of impact sound due to the contact between the link and the support base are solved. Since the air cylinder 10 must be used as the pressure reciprocating mechanism, and the air supply device and the valve and controller for air supply control must be provided, not only the overall structure is complicated, but these It is thought that the maintenance of the equipment will also be forced.

  That is, in the “automatic conversion device” of Patent Document 3, as described in the second column, the 22nd line to the third column, the 13th line of the document, “the air cylinder 10 is used as a fluid pressure reciprocating mechanism”. Used, the one side of the conversion operation link 13 is connected to the free end side of the piston rod 11 via the joint portion 12 and the other end side of the conversion operation link 13 is linked to the conversion operation shaft 14. A roller 16 is attached to the distal end of the operating shaft 14... While the roller 16 rotates freely along the inner edge of the conversion link 3 or 4, the conversion link 3 or 4 is moved with respect to the foot base 5. The mounting shafts 17 and 18 can be rotated and moved so that the back 1 can be turned forward or backward ... ".

  That is, in the “automatic conversion device” of Patent Document 3, even if it is attempted to remove the “seat belt 2”, the roller 16 at the tip of the conversion operation shaft 14 becomes an obstacle, and the conversion link 3 or 4 is attached to the footrest. Unless it is removed from 5, it can not be removed. This means that work such as removing the conversion link 3 or 4 from the footrest 5 is unavoidable when performing maintenance such as cleaning of the soiled “sitton 2”.

  In general, a seat cushion of a vehicle seat causes deterioration (sagging) of cushion performance due to long-term use. This makes the seating comfort worse, so that it is necessary to be able to easily remove the seat cushion frame in order to replace the seat cushion.

  Accordingly, the present inventors have made various studies on how to make a convertible seat that can easily remove the seat cushion frame and suppress the generation of impact sound during the conversion operation as much as possible. As a result, the present invention has been completed.

  That is, the object of the present invention is to first enable the user to take a comfortable posture as tilting the seat cushion frame and to suppress the generation of impact sound during the switching operation as much as possible. It is to provide a convertible seat that can.

  Another object of the present invention is to provide a conversion seat that can suppress the generation of impact sound as much as possible with a simple structure in which the weight of the seat cushion frame varies depending on the part. It is in.

  Furthermore, another object of the present invention is to provide a convertible seat in which the seat cushion frame can be easily removed, and maintenance such as cleaning and conversion of the seat cushion can be easily performed. There is.

In order to solve the above problems, first, the means taken by the invention according to claim 1 will be described with reference numerals used in the description of the best mode described below.
“The left and right support bases 20 respectively mounted on the left and right bases 10 fixed in the vehicle interior of the vehicle, and one seat cushion frame 30 assembled between these support bases 20 so as to be tiltable in a bridge state, A vehicle conversion seat 100 including a backrest link 40 that is swingably assembled to each support base 20,
A left side surface of the seat cushion frame 30, the portion that has shifted from the center line 70 in the lateral direction of the seat cushion frame 30, provided with at least one cam 50 or pin 60, the at least one cam The pin 60 or the cam 50 with which the 50 or the pin 60 engages is provided on the back link 40 side,
While the backrest link 40 is swung from one side to the other side, the pin 60 is engaged with the cam groove 51 of the cam 50 so that the seat cushion frame 30 is inclined from one side to the other side. Vehicle conversion seat 100 characterized by
It is.

  That is, as shown in FIGS. 1 and 2, the vehicle conversion seat 100 according to the present invention includes left and right support bases 20 that are respectively mounted on the left and right bases 10 fixed in the vehicle cabin. These are provided with one seat cushion frame 30 that is assembled between the support bases 20 so as to be tiltable in a bridge state, and a backrest link 40 that is swingably assembled to each support base 20. In addition, although the back support 40a is not clearly shown in each figure, this back support 40a is attached to the upper end of each back support link 40, as shown in FIG.

  Further, in the vehicle conversion seat 100 according to the present invention, as shown in FIGS. 1 to 3, on the side surface of the seat cushion frame 30, which is shifted from the center line 70 of the seat cushion frame 30, At least one cam 50 or pin 60 is provided, and the pin 60 or cam 50 with which the at least one cam 50 or pin 60 engages is provided on the back support link 40 side.

The cam 50 needs to be provided on the side surface of the seat cushion frame 30 and at a portion shifted from the center line 70 of the seat cushion frame 30. This is because a pin 60 on the back support link 40 described later is engaged with the cam 50 so that the seat cushion frame 30 is tilted to the opposite side in accordance with the swing of the back support link 40. frame 30, i.e. by tilting the seat cushion 30a to the swing side of the backrest link 40, since the user on the seat cushion 30a must to be taken euthanasia posture.

  And it is necessary to provide the pin 60 engaged with this cam 50 in the backrest link 40 side. This is because the back support link 40 to which a force for a switching operation is applied by these pins 60 and the cam 50 and the seat cushion frame 30 that must follow the movement of the back support link 40 must be interlocked. Because there is. Here, “provided on the back support link 40 side” refers to a case where it is provided directly on the back support link 40 or provided on the conversion shaft 41 that swings in synchronization with the back support link 40 as in the best mode described later. Etc.

  From the above, it is sufficient that each cam 50 and the pin 60 engaged therewith are each addressed to one, but may be provided by being provided in each part as required. Considering that the cushion frame 30 has a quadrangular shape as shown in FIG. 5A, a maximum of four cams 50 and pins 60 that engage with the cams 50 are provided on the front and rear sides of the left and right sides. Can be provided.

  In the best mode to be described later, as shown in FIGS. 5 and 6B, a single cam 50 is provided on the right side of the figure, and the pin 60 that engages with the cam 50 is shown in FIGS. As shown in FIG. 4, one each is provided on a conversion shaft 41 that swings in synchronization with each backrest link 40. This is advantageous because the seat cushion frame 30 can be assembled to the support base 20 without worrying about the directionality of the seat cushion frame 30.

  Needless to say, the cam 50 may be provided on the back support link 40 side, and the pin 60 that engages with the cam 50 may be provided on the seat cushion frame 30 side.

  Now, the vehicle conversion seat 100 configured as described above exhibits the operation as in the best mode shown in FIGS. 11 and 12. In these best modes, a pin 60 is provided on the back support link 40 side, that is, a conversion shaft 41 that swings in synchronization with the back support link 40, and the cam 50 that engages with the pin 60 is attached to the seat cushion frame. It is arranged on the 30 side.

  (A) to (c) of FIG. 11 are in the middle of changing the backrest links 40 and the seat cushion frame 30 that were in the state of (b) of FIG. 12 to the state of (a) of FIG. The situation is shown in the order of (a) to (c). That is, when a force is applied to each backrest link 40 in the state of FIG. 12B and the user raises the backrest link 40, the state shown in FIG. 11A is obtained. At this time, in the best mode described later, the left side portion of the seat cushion frame 30 shown in FIG. 11A is formed to be heavier than the other, so the left side portion of the seat cushion frame 30 is illustrated. It tilts to the left, and the detachable pin 31b attached here abuts against the stopper 22 of the support base 20 and remains stopped.

  When the state shown in FIG. 11A is reached, the pin 60 on the backrest link 40 side is about to enter the cam groove 51 of the cam 50. The open end of the cam groove 51 is not shown in FIG. 6 (b), since the opening is larger than the other portions of the cam groove 51, even if there is a slight shift in the assembled state of each portion, the back link 40 side The pin 60 surely enters the cam groove 51 of the cam 50.

  Next, when the back support link 40 is further swung to the state shown in FIG. 11B, the pin 60 integrated with the back support link 40 is located in the middle of the cam groove 51 of the cam 50. Invade until. At this time, the pin 60 starts to push down the cam 50 and starts to tilt the seat cushion frame 30 in the clockwise direction in the drawing. Further, the width of the cam groove 51 has already become narrower, and the seat cushion frame 30 is rattled with respect to the support base 20 by the pin 60 entering while pushing down the cam groove 51 of the cam 50 downward in the figure. There is nothing.

  When the back support link 40 is further swung to the state shown in FIG. 11C, the fixing pin 31a comes into contact with the stopper 22 and the tilting of the seat cushion frame 30 is completed. At this time, since the pin 60 on the back support link 40 remains engaged in the cam groove 51 of the cam 50, the seat cushion frame 30 is not inadvertently rattled. The back support link 40 is not yet in contact with the fixing pin 31a and the stopper 22 provided on the seat cushion frame 30 side.

  Finally, the state shown in FIG. 12A is reached. At this time, the tilting of the seat cushion frame 30 is completed, and the backrest link 40 that has been swung is a stopper on the support base 20 side. 22 and the pressing groove 43 presses the fixing pin 31a on the seat cushion frame 30 side (which is already in contact with the stopper 22) from above.

  That is, since the back support link 40 is already in contact with the stopper 22, that is, presses the fixing pin 31 a that is in a state of being difficult to vibrate, unlike the contact with the floating pin, Generation of impact sound can be suppressed as much as possible. Of course, since the stopper 22 is made of an elastic material, the stopper 22 is in contact with the fixing pin 31a shown in FIG. 11C and also in contact with the back link 40 shown in FIG. In either case, the generation of impact sound can be suppressed as much as possible.

  As a result of the above, in the vehicle conversion seat 100 according to the present invention, it is possible to suppress the generation of an impact sound due to the swinging of the backrest link 40 as much as possible during the conversion operation. The generation of impact sound can be suppressed as much as possible even by tilting.

Moreover, in order to solve the said subject, the means which the invention which concerns on Claim 2 took about the convertible seat 100 for vehicles of the said Claim 1,
“The one side portion of the center line 70 of the seat cushion frame 30 is configured to be heavier than the other side portion, and the cam 50 is attached to the other side portion.”
It is.

  That is, in the vehicle conversion seat 100 according to the second aspect, the weight of the seat cushion frame 30 is different on both sides of the center line 70, and the cam 50 described above is provided on the light side portion. is there. Even after the cam 50 is provided, the portion to which the cam 50 is attached is lighter than the opposite side.

  What happens when configured as described above is shown in FIGS. 11A to 11C and FIGS. 12A to 12B. For example, when each backrest link 40 is caused to change seats from the state shown in FIG. 12A to the state shown in FIG. 12B, first, FIG. As shown in

  That is, as shown in (a) of FIG. 11 through (c) and (b) of FIG. 11, when each back support link 40 is caused, the engagement and press in each part until then are released. Thus, the heavy side portion (the left portion in the figure in FIG. 11) of the seat cushion frame 30 is lowered by its own weight, and the detachable pin 31b attached to the side surface is attached to the stopper 22 made of an elastic material on the support base 20 side. Abut.

  Furthermore, if the back support link 40 is tilted down, the pressing groove 43 on the back support link 40 side engages with the attaching / detaching pin 31b and presses the attaching / detaching pin 31b onto the stopper 22. Since the detachable pin 31b is already in contact with the stopper 22 as described above, the generation of impact sound can be suppressed as much as possible. Then, the seat cushion frame 30 is finally in the state shown in FIG.

  In other words, the vehicle conversion seat 100 according to the second aspect of the present invention is configured such that when the engagement or the press in the seat cushion frame 30 is released by making a part of the seat cushion frame 30 heavy, The heavy side portion is tilted by its own weight, and the detachable pin 31b provided in this portion abuts against the stopper 22 on the support base 20, so that the back support link 40 abuts on the detachable pin 31b in a floating state. There is no such thing, and the generation of impact sound can be suppressed as much as possible.

  Accordingly, the vehicle conversion seat 100 according to the second aspect has a simple structure in which one side of the frame of the seat cushion 30 is made heavy in addition to performing the same function as that of the first aspect, and an impact sound is generated during the conversion operation. It is possible to suppress the generation of as much as possible.

Furthermore, in order to solve the above-mentioned problem, the means taken by the invention according to claim 3 is about the vehicle conversion seat 100 according to claim 1 or claim 2,
“Attaching and removing the fixing pin 31a and the detachable pin 31b that are pressed against the support base 20 side by the pressing groove 43 of the back support link 40 on the sides of the seat cushion frame 30 located on both sides of the center line 70. By removing only the pin 31b, the seat cushion frame 30 and the seat cushion 30a can be detached from the support base 20. "
It is.

  That is, in the vehicle conversion seat 100 according to the third aspect, as shown in FIGS. 5 and 6, the fixing pin 31 a and the detachable pin 31 b are attached to the side surface of the seat cushion frame 30. As shown in FIG. 5 (a), a fixing pin 31a is provided on the side surface of the seat cushion frame 30 on the right side of the center line 70 in the figure, and on the left side of the center line 70 in the figure. A detachable pin 31b is provided. The fixing pin 31a and the detachable pin 31b are pressed toward the support base 20 by the pressing groove 43 of the back link 40 as shown in FIGS. 12 (a) and 12 (b).

  The fixing pin 31a is literally provided on the side surface of the seat cushion frame 30, but the detachable pin 31b is opposite to the fixing pin 31a as shown in FIGS. 5 (a) and 5 (b). A pin mounting portion 31c is provided on the side so that it can be attached to and detached from the pin mounting portion 31c. That is, the fixing pin 31a cannot be removed, but the detachable pin 31b is screwed into, for example, the pin attachment portion 31c and can be easily removed from the pin attachment portion 31c by using a tool such as a screwdriver.

  Incidentally, on both sides of the seat cushion frame 30 and on the center line 70, as shown in FIGS. 5 and 6, engaging portions 33 are formed, and these engaging portions 33 are shown in FIG. It is engaged on the support protrusion 21 on the support base 20 side. In other words, the seat cushion frame 30 is merely placed on the support protrusion 21 of the support base 20 so as to be tiltable, and there is a portion engaged with the support base 20 other than the fixing pin 31a and the detachable pin 31b. There is no.

  In the vehicle conversion seat 100, the seat cushion 30a on the seat cushion frame 30 is contaminated, so that it may be desired to clean it. This cleaning operation can be performed while the seat cushion 30a is incorporated in the support base 20. However, in the vehicle conversion seat 100 according to claim 3, the seat cushion frame 30 is supported together with the seat cushion 30a. Since it can be removed from the base 20, its maintenance can be easily performed. The same applies to the replacement of the seat cushion 30a.

  The seat cushion frame 30 is removed as follows. That is, as shown in FIG. 12A, first, each back support link 40 is brought into contact with the fixing pin 31a so that there is no obstacle around the attaching / detaching pin 31b. The pin 31b is removed from the pin attachment portion 31c. Next, as shown in FIG. 12 (b), if each back link 40 is tilted to the opposite side and the fixing pin 31 a that has been pressed is released, the back link 40 and the seat cushion frame 30. Therefore, if the seat cushion frame 30 is pulled out together with the seat cushion 30a in the upper right direction in the figure, the removal of the seat cushion frame 30 is completed.

Therefore, vehicle convertible seat 100 of the third aspect, in addition to exhibit similar features of the claim 1 or claim 2, and be easily with Hazusuko the seat cushion frame 30, the seat cushion Maintenance such as cleaning and replacement of 30a can be easily performed.

As described above, in the present invention,
“The left and right support bases 20 respectively mounted on the left and right bases 10 fixed in the vehicle interior of the vehicle, and one seat cushion frame 30 assembled between these support bases 20 so as to be tiltable in a bridge state, A vehicle conversion seat 100 including a backrest link 40 that is swingably assembled to each support base 20,
A left side surface of the seat cushion frame 30, the portion that has shifted from the center line 70 in the lateral direction of the seat cushion frame 30, provided with at least one cam 50 or pin 60, the at least one cam The pin 60 or the cam 50 with which the 50 or the pin 60 engages is provided on the back link 40 side,
While the backrest link 40 is swung from one side to the other side, the pin 60 is engaged with the cam groove 51 of the cam 50 so that the seat cushion frame 30 is inclined from one side to the other side. What I did "
There is a feature in the structure, and this allows the user to take a comfortable posture as tilting the seat cushion frame 30, and can suppress the generation of impact sound during the switching operation as much as possible. A convertible seat 100 can be provided.

In the vehicle conversion seat 100 according to claim 2,
“The one side portion of the center line 70 of the seat cushion frame 30 is configured to be heavier than the other side portion, and the cam 50 is attached to the other side portion.”
In addition to exhibiting the same effects as those of the vehicle conversion seat 100 of the first aspect, it is possible to suppress the generation of impact sound at the time of conversion operation with a simple structure as much as possible. is there.

Further, in the vehicle conversion seat 100 according to claim 3,
“Attaching and removing the fixing pin 31a and the detachable pin 31b that are pressed against the support base 20 side by the pressing groove 43 of the back support link 40 on the sides of the seat cushion frame 30 located on both sides of the center line 70. By removing only the pin 31b, the seat cushion frame 30 and the seat cushion 30a can be detached from the support base 20. "
Therefore , the seat cushion frame 30 can be easily removed, and the seat cushion 30a can be easily removed. This makes it easy to perform maintenance such as cleaning and replacement.

  Next, the invention according to each claim configured as described above will be described with respect to the vehicle conversion seat 100 which is the best mode shown in the drawings. All the inventions of the item are included.

  FIGS. 1 and 2 show a vehicle conversion seat 100 according to the best mode. The vehicle conversion seat 100 is mounted on left and right bases 10 fixed in a vehicle cabin. The left and right support bases 20, one seat cushion frame 30 that can be tiltably assembled between the support bases 20 in a bridge state, and a backrest link 40 that is swingably assembled to each support base 20. Is.

  As the base 10, there may be adopted a form as shown on the left side of FIG. 1 depending on the state of the vehicle to be installed, but at least the illustration of FIG. The base 10 shown on the right side is employed. As shown in FIGS. 1 and 4, a spring 11 for assisting a tilting operation of a backrest link 40 described later is accommodated in the right base 10. When the spring 11 is a tension spring, during the swinging operation of the back support link 40, the swinging operation of the back support link 40 is assisted by the tensile force of the spring 11, and the back support link 40 is a stopper described below. The impact at the time of abutting 22 is also reduced.

  As shown in FIGS. 4A and 4B, the support base 20 has a “gondola-type” side surface shape, and has arm portions standing up and down. A stopper 22 made of a material is attached, and by this stopper 22, the backrest link 40, the fixing pin 31a, and the detachable pin 31b are received elastically. Of course, as shown in FIG. 1, two left and right support bases 20 are used for one back support 40a, and these two support bases 20 are back support links 40 described later. Are connected by a conversion shaft 41 that oscillates integrally.

  Further, a support protrusion 21 protrudes from the center of the support base 20, and engaging portions 33 formed on both sides of a seat cushion frame 30 described later are engaged on the support protrusion 21. Will be.

  As shown in FIGS. 5 to 9, the seat cushion frame 30 is formed in a flat frame shape, and a soft seat cushion 30 a on which a person will sit is attached. As shown in FIGS. 5A and 5B, a claw 32 is formed on the upper surface of the seat cushion frame 30. By using this claw 32, The seat cushion 30a can be easily integrated.

  As for the seat cushion frame 30, as shown in FIG. 5A, the support protrusions 21 on the support base 20 described above are formed on the upper surfaces of the left and right side portions and intersecting the center line 70. Engaging portions 33 to be engaged with each other are formed.

  And as shown in FIG.5 and FIG.6, the fixing pin 31a and the detachable pin 31b are provided in the right-and-left both sides | surfaces of this seat part cushion frame 30, These fixed pin 31a and the detachable pin 31b are seats. It arrange | positions back and forth by the same distance with respect to the centerline 70 of the part cushion frame 30. FIG. The fixing pin 31a is integrated with the side surface of the seat cushion frame 30 by means of welding or the like, but the detachable pin 31b is as shown in each of FIGS. 5 (a) and 6 (a) and FIG. The pin attachment portion 31c is attached to the side surface of the seat cushion frame 30 and is literally attached to and detached from the pin attachment portion 31c.

Of course, as shown in FIG. 8A, the fixing pin 31a and the attaching / detaching pin 31b are respectively attached to the same side of the seat cushion frame 30. For example, the attaching / detaching pin 31b is removed. when I Unajo on purpose shown in (b) of FIG. 12, the seat cushion frame 30 and this and the integral seat cushion 30a, be pulled out easily the shown upper right in FIG. 12 (b) It can be done.

  The back support link 40 constitutes a so-called “parallel link”, and a back support 40 a is attached to the upper end of the back support link 40 as indicated by the phantom line in FIG. 2. In other words, the back support 40a connected to the support base 20 side by the back support link 40, which is a parallel link, always inclines opposite to the side on which the back support link 40 is swung. When he leans on the front, he can take an easy posture on his upper body.

  Further, as shown in FIG. 1, the back support link 40 is assembled to the left and right support bases 20, and thereby supports both sides of the back support 40a. In the present best mode, as shown in FIG. 2, the conversion shaft 41 disposed inside each support base 20 is assembled to the pair of backrest links 40 via the central shaft 41 a. And the back support link 40 swing together. As shown in FIG. 4, a spring arm 42 is integrally provided on the conversion shaft 41, and the spring arm 42 swings in the base 10 described above. The spring arm 42 is connected to the spring 11 so that the back link 40 can be easily swung by the action of the spring 11.

  Further, as shown in FIG. 4A, each of the back support links 40 is formed with a pressing groove 43 on the outer surface of the central portion thereof. As shown in FIG. 12, the pressing groove 43 is configured to reliably press the fixing pin 31a or the detachable pin 31b on the seat cushion frame 30 side toward the support base 20, and the tilting is completed after the conversion. The position of the seat cushion frame 30 is fixed.

  Then, the cam 50 is integrally attached to the lower portion of the side surface of the seat cushion frame 30 described above, as shown in FIGS. 2, 6B, 7, 9, 11, and 12. It is. In the case of this best mode, only one cam 50 is attached on the same side as the fixing pin 31a described above, and the cam groove 51 opens toward the detachable pin 31b. As shown in FIG. 6 (b), the cam groove 51 has a large entrance portion and has a width about the diameter of the pin 60 to be described later as it enters.

  The pin 60 is engaged with the cam groove 51 of the cam 50. As shown in FIGS. 2 and 4, the pin 60 is a switch that swings integrally with the backrest link 40 described above. It is attached to the shaft 41. In this best mode, the number of cams 50 is one, but the pin 60 is attached to both of the conversion shafts 41 as shown in FIG. This is done so that the pin 60 that engages with the cam 50 exists even when the seat cushion frame 30 is incorporated in each support base 20 in the opposite manner to that shown in FIG. It is.

(Other examples)
In the best mode described above, an example in which only one cam 50 is attached to the side surface of the seat cushion frame 30 is shown. However, the cam 50 may be attached to the front and rear of the center line 70, respectively. . In this case, the cam grooves 51 of the cams 50 face each other and the pins 60 must be provided on the back support links 40 side, but the seat cushion frame 30 is located on both sides of the center line 70. It is effective when the weight is the same. This is because the seat cushion frame 30 can always be tilted by the engagement of the cam 50 and the pin 60 when the vehicle conversion seat 100 is converted to either direction.

  Moreover, you may implement the fixing pin 31a pressed by the pressing groove 43 of the backrest link 40 instead of this attaching / detaching pin 31b. Then, since all become the detachable pins 31b and can be easily removed from the seat cushion frame 30 side, the seat cushion frame 30 provided with the seat cushion 30a can be easily detached from each support base 20. This is because it can be done.

It is a disassembled perspective view which shows the relationship between the base which comprises the conversion seat for vehicles which concerns on this invention, a support stand, and a backrest link. It is a partial expansion perspective view which shows each positional relationship of a backrest link, a conversion shaft, a cam, and a pin with respect to the support stand of the vehicle conversion seat. FIG. 3 is a partial front view of what is shown in FIG. 2, and (b) is a partial plan view of a state in which a seat cushion frame and a seat cushion are removed. The positional relationship of the base, the support stand, the spring, and the backrest link which comprise the convertible seat for vehicles is shown, (a) is a side view, (b) is a front view. The seat cushion frame which comprises the conversion seat for vehicles is shown, (a) is a partial top view, (b) is a side view, (c) is sectional drawing. The edge part of the same seat part cushion frame is expanded and shown, (a) is a top view and (b) is a side view. The edge part of the seat part cushion frame is shown, (a) is a perspective view of one side part, (b) is a perspective view of the other side part. The seat part cushion frame which attached the seat part cushion is shown, (a) is a top view, (b) is a front view. It is a partial fracture side view of the seat part cushion frame which attached the seat part cushion. It is the partial longitudinal cross-sectional view seen along the 1-1 line in (a) of FIG. The state when the back support link is swung with respect to the support base is shown. (A) is a side view of the back support link in an upright state, and (b) is the pin engaged with the cam groove of the cam. (C) is a side view when the tilting of the seat cushion frame is completed. It shows a state when the back support link is swung with respect to the support base, (a) is a side view of the state where the back support link is completely swung to the right side, and (b) is the back support link. It is a side view of the state swung completely to the left. It is a schematic side view which shows the prior art. It is a schematic side view which shows another conventional technique. It is a partial side view which shows another conventional technique.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Convertible seat for vehicles 10 Base 11 Spring 20 Support base 21 Support protrusion 22 Stopper 30 Seat cushion frame 30a Seat cushion 31a Fixed pin 31b Detachable pin 31c Pin attachment part 32 Claw 33 Engagement part 40 Back link 40a Back rest 41 Conversion shaft 41a Center shaft 42 Spring arm 43 Pressing groove 50 Cam 51 Cam groove 60 Pin 70 Center line

Claims (3)

Left and right support bases respectively mounted on left and right bases fixed in the vehicle interior of the vehicle, one seat cushion frame assembled so as to be able to tilt in a bridge state between these support bases, and each of the support bases A vehicle conversion seat having a backrest link assembled in a swingable manner,
A left side surface of the seat cushion frame, the portion that has shifted from the center line in the lateral direction of the seat cushion frame, provided with at least one cam or pin, the at least one cam or pin engages A pin or cam to be fitted is provided on the back link side,
While the backrest link is swung from one side to the other side, the pin is engaged with the cam groove of the cam, and the seat cushion frame is inclined from one side to the other side. Convertible seat for vehicles.   2. The vehicle according to claim 1, wherein one side portion of the center line of the seat cushion frame is configured to be heavier than the other side portion, and the cam is attached to the other side portion. Convertible seat.   At the side of the seat cushion frame, the fixing pin and the detachable pin that are pressed to the support base side by the holding groove of the back support link are attached to the portions located on both sides of the center line, and only the detachable pin is removed. The vehicle seat according to claim 1 or 2, wherein the seat cushion frame and the seat cushion can be removed from the support base.

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