JP3279682B2 - Air cylinder control method for retractable seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention controls the expansion and contraction of an air cylinder seat by the supply and exhaust of compressed air with the opening and closing of a seat solenoid valve. The present invention relates to an air cylinder control method for a retractable seat that swings a seat cushion between a storage position and a seating position.

[0002]

2. Description of the Related Art For example, a retractable seat capable of storing a seat cushion at a storage position which is a flip-up position in a general shared bus or a lift bus for the disabled has been known.

In such a retractable seat, the seat cushion is formed so as to be able to swing between a sitting position and a storage position set at a flip-up position, that is, to be flippable, and to be capable of compressing compressed air. It is supported by an air cylinder that can expand and contract under supply and exhaust so that swing can be regulated.

[0004] The air cylinder is connected to an air supply source such as a compressor via an electromagnetic valve, for example, and operates a main switch as a power switch and an operation switch for swinging a seat cushion. It is configured to be expandable and contractable by switching between the supply and exhaust of compressed air.

[0005] Normally, the operation switch is formed of an ON / OFF switch, and the air cylinder is extended by air supplied by a solenoid valve accompanying the ON operation of the operation switch.
It is configured to store a seat cushion.

[0006]

By the way, the solenoid valve is
Generally, it is formed to supply air when energized and exhaust when not energized.By energizing the solenoid valve with the ON operation of the main switch and operation switch, compressed air is supplied to the air cylinder to release the seat cushion. It is configured to store.

However, in such a configuration, the main switch is turned off when the seat cushion is stored.
When set to F, the energization of the solenoid valve is cut off,
The seat cushion is returned to the seating position irrespective of the operation of the operation switch by the contraction of the air cylinder accompanying the exhaust of the compressed air.

Therefore, when the main switch is turned off, the seat cushion cannot be held at the storage position, which is not preferable in terms of use of the retractable seat, particularly in terms of space utilization when the retractable seat is stored.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of controlling a retractable seat air cylinder to improve the usability and safety of the retractable seat.

[0010]

In order to achieve this object, according to the retractable seat air cylinder control method of the present invention, a seat cylinder associated with opening and closing of a seat solenoid valve by operating a predetermined storage switch. The seat cushion is swung from the sitting position to the storage position due to the expansion and contraction of the seat cushion, and the completion of the swinging of the seat cushion to the storage position is detected by the seat position detection means for detecting the expansion and contraction limit position of the seat cylinder. The lock means is moved from the release position to the lock position by controlling the expansion and contraction of the lock cylinder constituted by the air cylinder by opening the lock electromagnetic valve, thereby restricting the swing of the seat cushion at the storage position.

The locking means is moved from the locked position to the releasing position by the expansion and contraction of the locking cylinder accompanying the opening and closing of the locking electromagnetic valve by the operation of a predetermined seating switch, and the completion of the movement of the locking means to the releasing position. The seat cushion can be swung to the seating position by controlling the expansion and contraction of the seat cylinder by opening and closing the solenoid valve for the seat after detection by the lock position detecting means for detecting the expansion and contraction limit position of the locking cylinder.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

A method of controlling a retractable seat air cylinder according to the present invention is for controlling the expansion and contraction of a seat cylinder comprising an air cylinder and a lock cylinder. As shown in FIGS. The retractable seat air cylinder control device 10 capable of performing the control method controls the expansion and contraction of the seat cylinder 14 composed of an air cylinder under supply and exhaust of compressed air accompanying opening and closing of the seat solenoid valve 12. The seat cylinder 18 of the retractable seat 16 is configured to swing vertically with respect to the seat back 20 by the expansion and contraction of the seat cylinder.

The retractable seat 16 is provided on a shared bus, for example, as shown in FIG. As shown in FIG. 4 in addition to FIG. 3, the seat cushion 18 and the seat back 20 of the retractable seat are respectively attached to the inner wall 22 of the bus.

As shown in FIGS. 2 and 4, for example, a pair of brackets 24
The seat cushion 18 is pivotally attached to the bracket via a pivot pin 26 which is fixed to each of the 22 and serves as a hinge. In such a retractable seat 16, for example, an engagement piece engageable with a rear end of the seat cushion 18 is provided.
28 is fixed to the inner wall 22, and the seat cushion can be held in the normal seating position shown in FIG. 4 by the engagement with the engagement pieces.

In such a configuration, the seat cushion 18
However, by swinging up and down around the hinge 26,
The swinging motion is made between the seating position shown in FIG. 4 and the storage position set to the flip-up position shown in FIG.

As shown in FIGS. 2 and 4, the retractable seat 16 is formed to have, for example, an armrest 30 that can be stored in conjunction with the seat cushion 18. The armrest 30 is, for example, pivotally attached to a bracket 34 of the inner wall 22 by a pivot pin 32, and is capable of swinging up and down similarly to a seat cushion. And armrest
The extension end 36 of the support arm 30 and the rear end of the seat cushion 18 are connected by a connection arm 38 so as to be interlockable.

In such a configuration, the armrest is linked to the swing of the seat cushion 18 about the hinge 26.
30 is swung between a use position corresponding to a seating position of the seat cushion and a storage position (see FIGS. 4 and 5).

The configuration of such a retractable seat 16 is well-known, and the configuration of itself is not the purpose of the present invention, and will not be described in detail here. The retractable seat 16 is a seat cushion centered on the hinge 26.
The presence or absence of the armrest 30 and the overall shape are not particularly limited, as long as it can be stored by jumping up the 18.

As shown in FIGS. 2 and 4, in such a retractable seat 16, a seat cylinder 14 composed of an air cylinder includes a bracket 40 of an inner wall 22 and a seat back 18.
It is erected and pivotally mounted between the rear end and a bracket 42. The seat cylinders (air cylinders) 14 are disposed, for example, at two locations separated from each other in the left-right direction.

As shown in FIG. 1, the seat cylinder 14
Is provided with, for example, a cylinder body 14a and an extension rod 14b slidable with respect to the cylinder body, and supplies compressed air through two flow ports 44 (44-1, 44-2) provided at two places. It is configured to be able to expand and contract by exhaust. The seat cylinder 14 is formed so as to be capable of switching between expansion and contraction, for example, in accordance with the direction in which compressed air is supplied to the distribution port 44.
Here, for example, the distribution port 44-1 is connected to the sheet cylinder 14
And the flow port 44-2 is formed as an inflow port in the contraction direction.

That is, in the retractable seat having the seat cylinder 14 mounted thereon, as shown in FIGS. 4 and 5, the seat cushion 18 swings in the seating position direction with the seat cylinder reduced. As it moves, the seat cushion can swing in the storage position direction under extension.

It should be noted that a known air cylinder can be used as the seat cylinder 14, and the configuration of the air cylinder itself is not the purpose of the present invention, and will not be described in detail. Also, here, two cylinders for sheet
Although 14 is provided, it is sufficient if the swing of the seat cushion 18 is performed smoothly.
A sheet cylinder may be provided at three or three places.

As shown in FIG. 1, such a seat cylinder 14 is connected to, for example, an air supply source 46 via a seat solenoid valve 12, and is used for controlling the opening and closing of the seat solenoid valve. The expansion and contraction of the seat cylinder can be controlled by switching between air flow and blocking. Usually, a compressor can be used as the air supply source 46.

The seat solenoid valve 12 is formed so as to be capable of switching the opening and closing of a flow path by, for example, supplying and shutting off a current.
The circulation ports 44-1 and 44-2 of the sheet cylinder are connected to individual connection ends, respectively. The seat solenoid valve 12 is
The two connection positions 12a and 12b are set so that the direction of supply of compressed air from the compressor 46 connected to the inflow port is set to one of the extension side and the reduction side of the seat cylinder 14.
Is formed.

In such a configuration, a seat solenoid valve for supplying compressed air to the flow port 44-1 of the seat cylinder is provided.
The connection position 12a of 12 is the extension position, and the connection port 44-2
A connection position 12b for supplying air to the air is formed as a reduction position.

As shown in FIG. 1, when air is supplied to one of the flow ports 44 of the seat cylinder 14, the compressed air is exhausted from the other flow port, and the compressed air is exhausted through the seat solenoid valve 12. The seat solenoid valve is configured to be released into the atmosphere.

Reference numeral 48 in FIG. 1 denotes a three-way joint for connecting the three pipes so as to be able to flow therethrough, and through the three-way joint, the flow ports 44-1 and 44 of the seat cylinder 14 are provided. -2 is
Both are connected to corresponding connection ends of the seat solenoid valve 12.

As can be seen from FIG. 6, the seat solenoid valve 12 includes, for example, a main switch 50 for switching power ON and OFF, and a seating position of the seat cushion 18 and a storage position by opening / closing control of the seat solenoid valve. It is connected to a vehicle battery (BATT) serving as a power supply via an operation switch 52 for setting a position.

As the main switch 50, for example, a holding type lever switch or the like can be used.
It is connected between the battery (power supply) and the operation switch 52.

As the operation switch 52, for example,
An automatic return type seesaw switch having a main contact 52a and two-position switching contacts 52b and 52c and having a neutral position in which the main contact does not contact any of the two-position switching contacts can be used.

The main contact 52a of such an operation switch is
Normally, the main contact is brought into contact with one of the switching contacts 52b and 52c by pressing the operation piece (not shown) of the operation switch or the like in an arbitrary direction in the neutral position. Then, when the operation force of the operation switch 52 is released,
The main contact 52a is configured to automatically return to the neutral position together with the operation piece.

The main contact 52a of the operation switch is, for example,
It is connected to the battery via the main switch 50, and the supply destination of the current from the battery can be switched to one of the switching contacts 52b and 52c.

As shown in FIG. 6, for example, the extension side 12-1 of the seat solenoid valve 12 is connected to the switching contact 52b of the operation switch, and the reduction side 12-2 is connected to the switching contact 52c. I have.

In such a configuration, the switching operation of the main contact 52a to the switching contact 52b side causes the seat solenoid valve to be switched.
The current from the battery is supplied to the extension side 12-1 of 12, and the seat solenoid valve is switched to the extension position 12a. By the operation of switching the main contact 52a to the switching contact 52c side, current is supplied from the battery to the reduction side 12-2, and the seat solenoid valve is switched to the reduction position 12b.

That is, in such a configuration, the switching contact 52b of the operation switch is formed as the set position of the storage position, and the switching contact 52c is formed as the set position of the seating position.

As can be seen from FIG. 3, the main switch 50 can be operated by a driver, for example,
An operation switch 52 is disposed in a position adjacent to the driver seat 54 and in a crew space 56 and the like.

Here, the air cylinder control device 10
For example, the seat position detecting means 58 (58-1, 58-2) capable of detecting the seating position and the storage position of the seat cushion 18, respectively.
Is formed.

As the seat position detecting means 58 (58-1, 58-2), for example, within the seat cylinder 14, the extension limit position and the reduction limit position of the extension rod 14b with respect to the cylinder body 14a can be detected. The provided microswitch can be used. That is, in such a configuration, the storage position of the seat cushion 18 is detected at the extension limit position of the seat cylinder 14, and the seating position of the seat cushion is detected at the reduction limit position.

For example, the seat position detecting means 58-1 is formed as a normally open contact, and is disposed at a position where the extended position of the seat cylinder 14 can be detected. The seat position detecting means 58-2 is formed as a normally closed contact, and is provided at a position where the reduced position of the seat cylinder 14 can be detected. That is, the seat position detecting means 58-1 is configured as a storage position detection switch for detecting the storage position of the seat cushion 18, and the seat position detection means 58-2 is configured as a seating detection switch for detecting the seating position.

Here, the air cylinder control device 10 is provided with a lock means 60 for forcibly restricting the swing of the seat cushion 18 at the storage position. As shown in FIGS. 2 and 4, the locking means 60 is formed, for example, with a pair of support rods 64 and 65 integrally and rotatably connected by a connecting arm 62.

The locking means 60 is provided with a support rod 6 by pulling and pushing the connecting arm 62 in the longitudinal direction as the locking cylinder 68 made of an air cylinder expands and contracts.
4, 65 are configured to be rotated between an unlocked position and a locked position.

The support rods 64 and 65 are, for example, pivotally attached to the brackets 70 of the inner wall 22, respectively. It is rotatable. Such support rods 64 and 65 are configured to be unlocked at the pushed position of the connecting arm 62 and locked at the towing position of the connecting arm, for example.

As shown in FIG. 1, for example, the lock cylinder 68 supplies compressed air through two communication ports 74 (74-1, 74-2) provided in the same manner as the seat cylinder 14. It is configured to be able to expand and contract by air and exhaust.

As shown in FIG. 1, the lock cylinder 68 is connected to the compressor 46 via, for example, a lock solenoid valve 76, and the flow of compressed air and the blockage of the compressed air are controlled by the opening and closing control of the lock solenoid valve. , The expansion and contraction of the locking cylinder can be controlled.

The locking solenoid valve 76 is formed so as to be capable of switching the opening and closing of the flow path by supplying and shutting off current, similarly to the seat solenoid valve 12, for example.
74-1 and 74-2 are connected to individual connection terminals.
Further, the locking solenoid valve 76 is configured such that the supply direction of the compressed air from the compressor 46 connected to the inflow port via the three-way joint 78 is set to one of the extension side and the reduction side of the seat cylinder 14. Are formed with two connection positions 76a and 76b.

In such a configuration, a lock solenoid valve for supplying compressed air to the flow port 74-1 of the lock cylinder is provided.
The connection position 76a of the valve 76 is formed as an extension position, that is, a release position, and the connection position 76b for supplying air to the flow port 74-2 is formed as a contraction position, that is, a lock position.

As can be seen from FIG. 1, the locking cylinder 68 is connected to the corresponding pipe via a three-way joint 78.

As can be seen from FIG. 6, for example, the extension side 76-1 of the locking solenoid valve 76 is connected to the switching contact 52c of the operation switch, and the reduction side 76-2 is connected to the extension detection switch 58-1. Connected to the switching contact 52b.

As shown in FIGS. 1 and 6, in such a configuration, the switching operation of the main contact 52a to the switching contact 52c side causes the current from the battery to extend to the extension side 76-1 of the locking solenoid valve 76. When supplied, the locking solenoid valve is switched to the extended position 76a. Further, the switching operation of the main contact 52a to the side of the switching contact 52b,
As a result, the current from the battery is supplied to the reduction side 76-2, and the seat solenoid valve is switched to the reduction position 76b.

Further, for example, a lock position detecting means 80 for detecting the lock position and the release position of the support rods 64 and 65 is provided.

As the lock position detecting means 80 (80-1 and 80-2), for example, similarly to the sheet detecting means 58, a micro-circuit provided so as to detect the extension limit position and the contraction limit position of the lock cylinder 68 can be detected. Switches are available, respectively. The lock position detection means 80-1 is formed as a release detection switch, and the lock position detection means 80-2 is formed as a lock detection switch.

As shown in FIG. 6, the release detection switch 80-1
Is formed, for example, as a normally open contact, and is interposed between the switching contact 52c of the operation switch and the reduction side 12-2 of the seat solenoid valve. Lock detection switch 80-2
Are formed as normally closed contacts, for example, and are interposed between the relay 82 and the ground together with the seating detection switch 58-2.

As the relay 82, for example, an electromagnetic relay capable of switching a corresponding relay contact 82b by passing a current through a coil 82a can be used. The relay includes a diode D1 and a diode D1 at both switching contacts 52a and 52b of an operation switch. Each is connected via D2.

A notification means, for example, a pilot lamp 84 is connected to the relay contact 82b. The pilot lamp (notifying means) 84 switches the relay contact 84b when the relay 82 is energized, and the seating detection switch 58-
2. The light can be turned on by turning on the lock detection switch 80-2.

As shown in FIG. 3, the pilot lamp 84 is provided, for example, at a position where the operator of the operation switch 52 can easily confirm the operation, that is, at a position adjacent to the operation switch.

For example, the seat cushion 18 shown in FIG.
Is assumed to be the initial position of the retractable seat 16. As can be seen from FIGS. 6 and 7 in addition to FIG. 4, the seat cylinder 14
The seating detection switch 58-2 is turned off due to the contracted state, and the lock detection switch 80-2 is turned on due to the extended state of the locking cylinder 68.

Here, since both the seat solenoid valve 12 and the lock solenoid valve 76 are closed, the contracted state of the seat cylinder 14 and the extended state of the lock cylinder 68 are maintained.

Then, from such a state, for example,
After the main switch 50 is turned on, the operation switch 52 is operated in the retracting direction to switch the main contact 52a to the switching contact 52b side. First, the extension side 12-1 of the seat solenoid valve is turned on.
As a result, the seat solenoid valve 12 is switched to the extended position 12a as shown by a two-dot chain line in FIG.

Then, the compressed air from the compressor 46 flows through the corresponding pipeline to the circulation port of the sheet cylinder.
The seat cushion 18 is swung together with the armrest 30 in the clockwise direction in FIG. 4 around the hinge 26 by the pressing of the rear end portion caused by the expansion of the seat cylinder 14.

At this time, when the seat detection switch 58-2 returns to ON due to the extension of the seat cylinder 14, the pilot lamp 84 is turned on and stored by the switching of the relay contact 82b accompanying the energization of the relay 82. During the storage operation of the expression sheet 16,
It is notified to the operator and the like.

Then, for example, the storage detection switch 58-1
Is turned ON, the seat cylinder 14 is extended, that is, FIG.
When the arrival of the seat cushion 18 to the storage position shown in FIG. 7 is detected, as shown in FIGS. 6 and 7, the reduction side 76-2 of the locking solenoid valve 76 is turned on, and the locking solenoid valve 76 is turned on. , As shown by the broken line in FIG.

Then, the compressed air from the compressor 46 flows through the corresponding pipeline to the flow port of the locking cylinder.
The support rods 64 and 65 are supplied with air to 74-2, respectively.
The rear end of the seat cushion 18 is pressed and rotated to a lock position where it can be supported.

Then, as shown in FIG.
When the lock state of the seat cushion 18 by the lock means 60 is detected by the lock detection switch 80-2 being turned off due to the extension of the lock cylinder 68, the relay 82 is deenergized. (See FIG. 6). Then
By switching the relay contact 82b, the pilot lamp 84
Is turned off, and the operator is notified that the storage operation of the retractable seat 16 is completed.

That is, in the retracted position of the retractable seat 16, the swing of the seat cushion 18 is forcibly restricted by the support rods 64 and 65 of the locking means 60. It is held in the storage position regardless of OFF.

In the storage position of the retractable seat 16 shown in FIG. 5, the operation switch 52 is operated in the seating direction, and as shown in FIGS. 6 and 8, the main contact 52a is switched to the switching contact 52c side. First, the extension side 76 of the locking solenoid valve
-1 is supplied with current and turned on. Then, as shown by the broken line in FIG. 9, the lock solenoid valve 76 is switched to the extension position 76a, the compressed air from the compressor 46 is supplied to the circulation port 74-1 and the lock cylinder 68 is extended. You.

Then, as shown in FIGS. 6 and 8, as the locking cylinder 68 is reduced,
64 and 65 reach the release position, release detection switch 80-2 is ON
Then, the reduction side 12-2 of the seat solenoid valve is turned ON, and the seat cylinder 14 is reduced by the supply of compressed air to the distribution port 44-2 at the reduction position 12b.

Then, the rear end of the seat cushion 18 is pulled under the contraction of the seat cylinder 14 and the hinge 26
, The seat cushion swings counterclockwise, that is, in the seating direction.

At the seating position of the seat cushion 18, the reduction of the seat cylinder 14 is triggered by the seating detection switch.
When it is detected by turning off 58-2, the relay lamp 82b is switched when the relay 82 is deenergized, and the pilot lamp
84 turns off, and the completion of the seating operation of the retractable seat 16 is notified to the seated person.

By the way, for example, the seat cylinder 14
When the operation force of the operation switch 52 is released when the seat cushion 18 swings due to the expansion and contraction of the seat, the seat solenoid valve is immediately closed by shutting off the supply current to the seat solenoid valve 12. Then, the compressed air inside the seat cylinder 14 is reliably sealed, so that the seat cylinder is held in the expanded and contracted state when the operation force of the operation switch is released.

That is, in such a configuration, the intermediate stop of the seat cushion 18 between the storage position and the seating position can be easily performed by releasing the operation force of the operation switch 52.

As described above, according to the retractable seat air cylinder control method of the present invention, the seat cushion 18 in the retracted position is supported by the support rods 64 and 65 of the locking means 60.
Can be regulated. That is, in addition to the closing of the seat electromagnetic valve 12, the rocking of the seat cushion 18 is forcibly restricted by the support rods 64 and 65 of the locking means. The seat cushion can be held in the storage position.

Therefore, the seat cushion 18 does not suddenly swing from the storage position toward the seating position, and the safety is sufficiently improved.

Since the storage state of the retractable seat 16 can be maintained for a long time, the range of use of the space of the retractable seat can be sufficiently expanded.

If the operation of the operation switch 52 is interrupted when the seat cushion 18 swings due to the expansion and contraction of the seat cylinder 14, the expansion and contraction of the seat cylinder is immediately stopped by closing the electromagnetic valve 12 for the seat. The seat cushion 18 is held at the corresponding position. That is, if there is an obstacle such as luggage within the swing range of the seat cushion 18, even if the operation switch 52 is erroneously operated, if the operation of the operation switch is immediately interrupted, the seat cushion 18 can be moved to the luggage or the like. There is no forcing.

Therefore, when the seat cushion 18 swings, breakage and damage of the seat cushion and the luggage can be sufficiently prevented, and the safety of the seat cushion and the luggage can be sufficiently ensured.

Since the seat cylinder 14 and the locking cylinder 68 are sequentially controlled to expand and contract, the locking and unlocking of the locking means 60 can be performed reliably and easily without being hindered by the rear end of the seat cushion 18. Can be done. Therefore, the seat cushion 18 and the locking means 60 do not malfunction or malfunction.

Further, the storage position and the seating position of the seat cushion 18 are detected by a storage detection switch 58-1 and a seat detection switch 58-2 which are micro switches provided on the seat cylinder 14, and a locking means 60 is provided. The lock release position and the lock position are detected by the release detection switch 80-1 and the lock detection switch 80-2, which are micro switches provided on the locking cylinder 68, so that the size around the seat cushion can be sufficiently prevented. At the same time, erroneous operation due to unexpected contact from the outside does not occur, so that operability and safety are further improved.

Here, in the embodiment, the locking means 60
Are configured to be unlocked by pushing the connecting arm 62 along with the extension of the locking cylinder 68, and to be locked by pulling the connecting arm along with the contraction of the locking cylinder 68. However, the present invention is not limited to this. On the contrary, the lock is released by pulling the connecting arm 62 with the contraction of the locking cylinder 68, and locked by pushing the connecting arm with the extension of the locking cylinder. It may be configured as follows.

The position where the operation switch 52 is mounted is exemplified by the crew space 56, but is not limited to this, and is not limited to this. For example, the position where the driver seat 54 can be operated or the retractable seat 16 can be used. An operation switch may be provided at a position adjacent to the device.

Further, as shown in FIG. 3, in the embodiment, the retractable seat 16 to be mounted on a shared bus is illustrated, but the present invention is not limited to this. Particularly, it can be used particularly effectively for vehicles and the like that require expansion of space.

Further, the present invention is not limited to seats such as buses and the like, as long as the seats can be stored under the expansion and contraction of air cylinders. May be applied.

The embodiments described above are for explaining the present invention, and do not limit the present invention in any way.
It goes without saying that all modifications and alterations within the technical scope of the present invention are included in the present invention.

[0084]

As described above, according to the retractable seat air cylinder control method of the present invention, since the rocking means forcibly restricts the swing of the seat cushion at the retracted position, the main switch is not used. The seat cushion can be held in the storage position irrespective of the ON and OFF of. Therefore, the seat cushion does not suddenly swing from the storage position toward the seating position, and the safety is sufficiently improved.

Further, the interruption of the operation of the operation switch causes
If the expansion and contraction of the seat cylinder is immediately interrupted by closing the seat solenoid valve, the seat cushion is held at the corresponding position. Therefore, when the seat cushion swings, breakage, damage, and the like of the seat cushion and the luggage can be sufficiently prevented, and the safety of the seat cushion and the luggage can be sufficiently ensured.

Further, since the seat cylinder and the locking cylinder are controlled to expand and contract sequentially, the locking of the locking means can be prevented.
The lock can be released reliably and easily without being hindered by the rear end of the seat cushion. Therefore, the seat cushion and the locking means do not malfunction or malfunction.

Since the completion of the swing of the seat cushion and the completion of the movement of the locking means are detected by the respective position detecting means provided on the seat cylinder and the locking cylinder, the size around the seat cushion can be sufficiently increased. Can be prevented, and no erroneous operation is caused by unexpected contact from the outside.
Safety is further improved.

[Brief description of the drawings]

FIG. 1 is a pneumatic circuit diagram of a retractable seat air cylinder control device according to the present invention in a seating position.

FIG. 2 is a partial schematic perspective view of a retractable seat air cylinder control device.

FIG. 3 is a schematic plan view of a shared bus with a retractable seat mounted.

FIG. 4 is a schematic side view of the retractable seat air cylinder control device in a seating position.

FIG. 5 is a schematic side view of a retractable seat air cylinder control device in a storage position.

FIG. 6 is an example of an electric circuit diagram of a retractable seat air cylinder control device.

FIG. 7 is a time chart at the time of setting a storage position according to the retractable seat air cylinder control method of the present invention.

FIG. 8 is a time chart at the time of setting a seating position according to the retractable seat air cylinder control method of the present invention.

FIG. 9 is a pneumatic circuit diagram of the retractable seat air cylinder control device in the retracted position.

[Explanation of symbols]

10 Retractable seat air cylinder control device 12 Seat solenoid valve 14 Seat cylinder 16 Retractable seat 18 Seat cushion 46 Air supply source (compressor) 50 Main switch 52 Operation switch 58 (58-1, 58-2) (Seat ) Position detecting means (micro switch) 60 Locking means 62 Connecting arm 64,65 Support rod 76 Locking solenoid valve 80 (80-1, 80-2) (Lock) Position detecting means (micro switch) 84 Notification means (pilot lamp) )

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-53-57609 (JP, A) JP-A-2-35841 (JP, U) JP-B-38-22079 (JP, B1) (58) Field (Int.Cl. ⁷ , DB name) B60N 2/30 B60N 2/44

Claims (1)

(57) [Claims] 1. A seat cylinder comprising an air cylinder is controlled to expand and contract by supply and exhaust of compressed air when a seat solenoid valve is opened and closed, and the seat cushion is stored in a retracted position by the expansion and contraction of the seat cylinder. In the air cylinder control method for the retractable seat that swings between the seating positions, the seat cushion is swung from the seating position to the storage position by expansion and contraction of the seat cylinder accompanying opening and closing of the seat solenoid valve by operating a predetermined storage switch. After the completion of the swing of the seat cushion to the storage position is detected by the seat position detecting means for detecting the expansion / contraction limit position of the seat cylinder,
By controlling the expansion and contraction of the locking cylinder composed of an air cylinder by opening a separate locking solenoid valve, the locking means is moved from the release position to the locking position to restrict the swing of the seat cushion in the storage position, and The locking means is moved from its locked position to the release position by the expansion and contraction of the locking cylinder caused by the opening and closing of the locking solenoid valve by the operation of the seating switch, and the completion of the movement of the locking means to the release position is determined by the expansion and contraction of the locking cylinder. The retractable type wherein the seat cushion can be swung to the seating position by controlling the expansion and contraction of the seat cylinder by opening and closing the seat solenoid valve after detection by the lock position detecting means for detecting the limit position. Air cylinder control method for seat.