JP2591876Y2 - Seat damper device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a seat damper device used for a cockpit of a ship or a driver's seat of a vehicle.

[0002]

2. Description of the Related Art In recent years, the cockpit of a ship, the driver's seat of a vehicle, and the like often provide a so-called cushion and allow the height thereof to be adjusted. Therefore, various seat damper devices have been proposed. I have.

For example, in the proposal according to Japanese Utility Model Laid-Open Publication No. 1-112745, an upper frame connected to the lower end of a seat and a lower frame connected to a floor or the like are connected by an X-link and the upper frame is connected. A damper that exerts a predetermined damping function is disposed between the upper frame and the lower frame while allowing the frame to move up and down with respect to the lower frame.

[0004] The damper can change the lower end position of a suspension spring that urges the damper in the extension direction in the vertical direction.
The length of the damper, that is, the height of the upper end of the damper can be adjusted.

Therefore, according to the above conventional proposal, the height of the upper end position of the suspension spring is adjusted by changing the lower end position of the suspension spring in the damper by an external operation such as using a tool. The height position can be adjusted with respect to the floor or the like.

[0006]

However, the following problems are pointed out in the above-mentioned conventional proposals.

That is, in the above proposal, when changing the lower end position of the suspension spring, an external operation such as the use of a tool is required, and therefore, the lower end position of the suspension spring cannot be changed by a so-called one-touch operation.

Therefore, the lower end position of the suspension spring cannot be changed during the operation of the boat, that is, the height position of the seat cannot be changed, and the seat cannot be adjusted to the optimum position during the operation of the boat.

In addition, when adjusting the lower end position of the suspension spring, the operator has to perform so-called peeking below the seat, which is very inconvenient.

Further, if the above-mentioned proposal is set so that height adjustment with a large stroke can be realized, a large operation force is required, which may cause a problem that the operation is burdensome.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to change the height position of the seat by a so-called one-touch operation which does not require a large operation force, and furthermore, the whole apparatus is provided. It is an object of the present invention to provide a seat damper device which is capable of reducing the weight and cost of the seat, and which is optimal for expecting the improvement of versatility.

[0012]

In order to achieve the above object, the structure of the seat damper device according to the present invention includes an upper frame connected to a lower end of a seat and a lower frame connected to a floor or the like. Are connected by an X-link to allow the upper frame to move up and down with respect to the lower frame, and a damper disposed between the upper frame and the lower frame to exhibit a predetermined damping function; A piston-side oil chamber in which a biasing spring and an adjusting cylinder disposed in series with the spring to enable the spring to expand and contract, wherein a damper is defined by a piston in the cylinder; and a cylinder. A rod-side oil chamber that defines an oil reservoir that is defined by a piston and that expands in the sliding direction of the piston when hydraulic oil is supplied from the outside while being defined by the piston. An on-off valve for which the adjusting cylinder is opened and closed by an external operation, an oil chamber for allowing the inflow of hydraulic oil from outside when the on-off valve is opened, and the spring protruding to the outside when hydraulic oil is supplied to the oil chamber. And a rod body for compressing the oil reservoir, and the oil reservoir and the oil chamber are formed to communicate with each other via a pipeline when the on-off valve is opened.

[0013]

Therefore, when hydraulic oil from the outside is supplied to the oil reservoir formed in the compartment in the rod-side oil chamber of the damper, the oil reservoir expands in the sliding direction of the piston, and the piston in the cylinder moves. Reduce the stroke amount.

That is, the amount of protrusion of the piston rod with respect to the cylinder is reduced.

Conversely, when the hydraulic oil in the oil reservoir is discharged to the outside, the oil reservoir contracts and the amount of rise of the piston in the cylinder increases.

That is, the amount of protrusion of the piston rod with respect to the cylinder is increased.

Therefore, since the piston side oil chamber in the cylinder receives the back pressure due to the gas pressure, the sliding position of the piston in the cylinder, that is, the damper, is supplied by the supply and discharge of the hydraulic oil from the outside to the oil reservoir. Can be adjusted.

On the other hand, when hydraulic oil from the outside is supplied to the oil chamber of the adjusting cylinder, the adjusting cylinder expands and compresses the spring. At this time, the spring force of the spring is increased.

Conversely, when the hydraulic oil in the oil chamber is discharged to the outside, the adjusting cylinder contracts to allow the spring to expand, thereby reducing the spring force of the spring.

Therefore, expansion and contraction of the adjusting cylinder, that is, adjustment of the spring force of the spring can be performed by supplying and discharging hydraulic oil to and from the oil chamber from the outside.

When the opening valve is opened by an external operation of the on-off valve, the oil reservoir and the oil chamber are communicated with each other. When the damper is extended, the spring force of the spring is reduced. When the spring force is adjusted to prevent the spring force from being reduced and the damper is contracted, the spring force is adjusted so that the spring force is not increased in the spring.

As a result, a desired height adjustment of the damper and a preferable spring force adjustment of the spring at that time can be performed by a so-called one-touch operation.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on the illustrated embodiment. As shown in FIG. 1, a seat damper device according to an embodiment of the present invention is provided at the lower end of a seat S. The upper frame F1 and the lower frame F2 connected to the floor G are connected by an X link L so that the upper frame F1 can move up and down with respect to the lower frame F2.

The seat damper device includes a damper D disposed between the upper frame F1 and the lower frame F2 to perform a predetermined damping function, a spring Sp for urging the upper frame F1 in a rising direction, And an adjusting cylinder Cy that allows the spring Sp to expand and contract.

Explaining a little, the X link L is formed by link members L1 and L2 pivotally connected at their respective centers in the longitudinal direction so as to be so-called foldable. One end is selectively pivotally connected to either the upper frame F1 or the lower frame F2, and the other end of each link member L1, L2 is connected to the upper frame via a roller or the like (not shown) connected thereto. F1 or the lower frame F2 is selectively contacted with one of the frames F1 and F2, and is movable in the direction of disposition of each of the frames F1 and F2 in the left and right direction in the drawing along with the frames F1 and F2. I have.

As shown in FIG. 2, the damper D is provided at the lower end of the piston rod 2 of FIG. 2 with respect to the cylinder 1 of the lower end of FIG. The tip side, which is the side, is inserted so that it can appear and disappear.

The damper D is provided with a piston rod 2
A piston 3 is slidably housed in the cylinder 1 at the end of the cylinder 1 and partitions the rod-side oil chamber R1 and the piston-side oil chamber R2 in the cylinder 1.

The piston 3 has a valve 30 so that the rod-side oil chamber R1 and the piston-side oil chamber R2 can communicate with each other via the valve 30.

As shown in FIG. 3, the valve 30 disposed on the piston 3 basically has an annular leaf valve 31 disposed in a laminated state and an outer peripheral end of the annular leaf valve 31. And a biasing spring 32 that biases the spring.

The annular leaf valve 31 closes the annular groove 3b, which is open at the upper end of the port 3a opened in the piston 3 so as to communicate with the piston side oil chamber R2, from the piston side oil chamber R1 side. It is arranged.

The outer peripheral end of the annular leaf valve 31 is pressed against a seat portion 3c formed on the outer peripheral upper end of the piston 3 at the outer peripheral end of the biasing spring 32. The circumferential end is a spacer 34 interposed at the same level around the outer circumference of the front spigot portion 2a of the piston rod 2.
, And downward bending thereof is allowed.

On the other hand, the biasing spring 32 is formed in the shape of an annular leaf valve whose outer peripheral side is bent downward, and its inner peripheral side end is engaged with the spacer 34 and the step 2 b formed on the piston rod 2. It is sandwiched between the inner peripheral end of the valve stopper 35 to be stopped.

An opening 32a is formed in the outer peripheral side of the urging spring 32 so that the hydraulic oil in the rod-side oil chamber R1 can act on the pressure receiving surface of the annular leaf valve 31. I have.

Therefore, according to the valve 30, when the piston 3 moves up in the cylinder 1, the hydraulic oil from the rod side oil chamber R1, which is on the high pressure side, is supplied to the inner peripheral end of the annular leaf valve 31. Flows into the piston-side oil chamber B so as to bend downward, and a predetermined extension-side damping force is generated when the inner peripheral end of the annular leaf valve 31 is bent.

When the piston 3 moves down the cylinder 1 on the pressure side, the hydraulic oil from the piston side oil chamber R2, which is on the high pressure side, raises the annular leaf valve 31 upward, so that the hydraulic oil is transferred to the rod side oil chamber R1. Inflow.

On the other hand, as shown in FIG. 2, the damper D has a free piston 4 in a piston side oil chamber R2 and a gas chamber Rg behind the free piston 4 as shown in FIG.
And the piston-side oil chamber R2 receives a back pressure by the gas pressure in the gas chamber Rg.

The damper D is connected to the rod-side oil chamber R1.
An oil reservoir R which expands in the sliding direction of the piston 3 by supply of hydraulic oil from outside is formed therein.

In the illustrated example, the oil reservoir chamber R has a metal diaphragm 20 formed in a tubular bellows shape, and the upper end thereof is allowed while allowing the piston rod 2 to pass through the upper end of the metal diaphragm 20. Sliding member 21 continuously provided so as to close
And a fixing member 22 connected to the lower end of the metal diaphragm 20 and closing the lower end while functioning as the valve stopper 35 (see FIG. 2).

That is, the sliding member 21 has its inner periphery slidably in contact with the outer periphery of the piston rod 2 with the seal 21a interposed therebetween, and the fixed member 22 has the inner periphery with the piston rod 2 interposed with the seal 22a interposed therebetween. 2 is closely attached to the outer periphery of the lower end spigot portion 2a.

Therefore, an oil reservoir R which is separated and independent from the rod-side oil chamber R1 is formed on the inner peripheral side of the metal diaphragm 20, and the outer peripheral side of the metal diaphragm 20 remains as the rod-side oil chamber R1. You.

The oil reservoir R may be formed in a ram cylinder structure as shown in FIG. 4 instead of the structure using the metal diaphragm 20.

That is, the structure of the ram cylinder is such that the fixing member 22 (see FIG. 2) is deformed to form a fixing member 23 having a cylindrical shape having a cylindrical portion extending upward, and a piston. And a retractable body 24 in the form of a piston slidably mounted on the outer periphery of the rod 2.

The retractable body 24 is configured such that its distal end, which is the lower end in the drawing, is inserted into the fixed member 23 so as to be able to protrude and retract.

According to this embodiment, there is an advantage that high durability of the oil reservoir R can be ensured as compared with the case where the metal diaphragm 20 is used.

Next, as shown in FIG. 2, the oil reservoir R is formed in a passage opened in the piston rod 2, that is, in an upper end of the piston rod 2 which is opened in the shaft core of the piston rod 2. A vertical hole 2c that opens, and a horizontal hole 2 that is radially drilled at the lower end side of the piston rod 2 and communicates with the lower end of the vertical hole 2c.
and d.

However, in the illustrated example, the upper end of the piston rod 2 is connected to the bracket B1, so that the vertical hole 2c is communicated with the bracket B1 to the outside through the opening 2e. ing.

The spring Sp is in the example shown in FIG.
As shown in the figure, the lower end is locked to the lower frame F2 via a spring receiver S1 connected to the lower frame F2, and the upper end is extended toward the upper frame F1, and the adjusting cylinder Cy is extended. Is locked to the adjusting cylinder Cy via a spring receiver S2 provided continuously with the adjusting cylinder Cy.

That is, in the illustrated example, the spring Sp
Is vertically arranged between the upper frame F1 and the lower frame F2, but this makes the expansion and contraction direction of the spring Sp and the vertical movement direction of the upper frame F1 the same. Is obtained.

The adjusting cylinder Cy is in the illustrated example, and as shown in FIG.
2, and is configured so that a rod body 41 from the inside of the cylinder portion 40 projects downward, that is, toward the upper end of the spring Sp, as shown in FIG.

The adjusting cylinder Cy defines an oil chamber 43 in the cylinder portion 40 by a piston 42 slidably housed in the cylinder portion 40, and connects the piston 42 to the rod body 41. It is connected to the base end.

The adjusting cylinder Cy is connected to the oil chamber 4.
3 and a port 44 for allowing communication between the outside and the outside, and an open / close valve V for opening and closing the port 44 by moving forward and backward by a screwing operation from outside.

Therefore, in the adjusting cylinder Cy,
The opening / closing operation of the opening / closing valve V makes it possible to supply and discharge hydraulic oil to and from the oil chamber 43 from outside, and when the hydraulic oil is supplied into the oil chamber 43, the piston 4
2 moves in the downward direction in the figure, and the rod body 41 descends,
That is, the rod body 41 is protruded toward the spring Sp, and compresses the spring Sp.

Conversely, when the operating oil is discharged from the oil chamber 43 to the outside by opening and closing the on-off valve V, the piston 42 moves in the cylinder portion 40 in the upward direction in the figure. Then, the rod body 41 is raised, that is, the rod body 41 is immersed in the cylinder part 40, and the spring Sp can be extended.

In the illustrated example, an oil amount adjusting pump 50 is connected to the adjusting cylinder Cy.
The flow rate of the working oil supplied to and discharged from the oil chamber 43 in the adjustment cylinder Cy can be changed.

That is, the oil amount adjusting pump 50 is a piston 5 slidably housed in a housing portion 51 integrally connected to the cylinder portion 40 constituting the adjusting cylinder Cy.
2 and an oil chamber 53 partitioned by the piston 52.

The oil amount adjusting pump 50 has an operating rod 54 which is connected to the piston 52 at the tip thereof and which is screwed into the housing portion 51. The operation oil, that is, the hydraulic oil in the oil chamber 53 flows out through the port 55 to the base side of the on-off valve V by a screwing operation.

Therefore, according to the oil amount adjusting pump 50,
When the operating oil in the oil chamber 43 in the adjustment cylinder Cy is insufficient, the oil can be replenished, and the cylinder portion 40 of the rod body 41 in the adjustment cylinder Cy is adjusted.
In a large stroke.

The adjusting cylinder C formed as described above
y, the oil chamber 43 is a rod-side oil chamber R of the damper D.
An on-off valve V is interposed in an oil reservoir R partitioned and formed in the inside 1, but is communicated via a pipe P.

Therefore, in the seat damper device according to this embodiment formed as described above, the operating oil is supplied to the oil reservoir R formed in the rod-side oil chamber R1 in the damper D. Then, the volume of the oil reservoir R is increased, and the oil reservoir R is expanded in the sliding direction of the piston 3.

As a result, since the oil reservoir R is connected to the piston 3,
Therefore, the length of the piston 3 in the sliding direction becomes large, and the sliding amount of the piston 3, that is, the rising amount of the piston 3 is suppressed to be small.

At this time, in the damper D,
Its length is shortened, and therefore the height of the top of the damper D is reduced.

Conversely, when the hydraulic oil in the oil reservoir R is discharged to the outside, the oil reservoir R contracts and the amount of rise of the piston 3 in the cylinder 1 increases, and the height of the top of the damper D rises. Make it higher.

Therefore, the sliding position of the piston 3 in the cylinder 1, that is, the height of the damper D can be adjusted by the operation of supplying and discharging the hydraulic oil to and from the oil reservoir R from the outside.

On the other hand, when hydraulic oil is supplied from the outside to the adjusting cylinder Cy, the adjusting cylinder Cy is operated, that is, the rod body 41 projects from the cylinder portion 40 and pushes the spring Sp. Shrink the spring Sp
Increase the spring force of

On the other hand, when the hydraulic oil of the adjusting cylinder Cy is discharged to the outside, the adjusting cylinder Cy is so-called contracted to permit the extension of the spring Sp, thereby reducing the spring force of the spring Sp. .

Incidentally, the opening operation of the opening valve V in the adjusting cylinder Cy causes the oil chamber 4 in the adjusting cylinder Cy to open.
3 and the oil reservoir R in the cylinder 1 are communicated via the pipe P.

As a result, until the oil pressure between the oil chamber 43 and the oil reservoir R is balanced, the flow of hydraulic oil is induced between them.

On the other hand, when the external force acting on the upper frame F1 to push the upper frame F1 downward is eliminated, the adjusting cylinder Cy which locks the upper end of the spring Sp by the urging force of the spring Sp. That is, the upper frame F1 to which the adjusting cylinder Cy is continuously provided is raised, and at this time, the rod body 41 of the adjusting cylinder Cy is pushed into the cylinder portion 40.

Accordingly, when the on-off valve V is opened when the above-mentioned external force is eliminated, the piston 3 extends in the cylinder 1 until the gas pressure in the gas chamber Rg and the oil pressure in the cylinder 1 are balanced in the cylinder 1. While sliding in the side direction, the piston 3 slides in the cylinder 1 in the extending direction until the hydraulic pressure between the oil reservoir R and the oil chamber 43 is balanced.

As a result, in the present invention, the projection of the piston rod 2 from the inside of the cylinder 1 is executed in cooperation with the spring force of the spring Sp and the gas pressure in the gas chamber Rg.

When the above-mentioned on-off valve V is closed, the communication between the oil reservoir R and the oil chamber 43 via the pipe P is cut off, and each of them becomes a so-called oil lock state.

At this time, the hydraulic oil is supplied to the oil chamber 43 by an amount corresponding to the contraction of the oil storage chamber R, so that the adjusting cylinder Cy is moved by the rod body 41 with the hydraulic oil flowing into the oil chamber 43. Project from the cylinder portion 40 and extend.

As a result, the spring Sp is contracted by the extension of the rod body 41 by the extension operation of the adjusting cylinder Cy, and the retracted position of the piston 3 in the cylinder 1, that is, the piston 3 in the cylinder 1, It is possible to prevent the urging force of the spring Sp from being changed even if the height position of the spring Sp is changed.

Accordingly, the height of the damper D can be adjusted independently of the adjustment of the spring force of the spring Sp, and the supply and discharge of the hydraulic oil in the oil reservoir R of the partition in the rod-side oil chamber R1 can be performed. Since the spring force of the spring Sp is adjusted together with the control, the desired height adjustment of the damper D and the preferable spring force adjustment of the spring Sp at that time can be performed at the same time.

FIG. 5 shows a damper D according to another embodiment of the present invention. Even in this embodiment, the basic configuration of the damper D is the same as that of the above-described embodiment. The same parts in the configuration are denoted by the same reference numerals in the drawings, and description thereof is omitted, and only the characteristic parts in this embodiment will be described below.

That is, in the damper D according to this embodiment, the oil reservoir R is defined on the outer peripheral side of the metal diaphragm 20.

That is, in this embodiment, a lid member 25 is connected to the upper end of the metal diaphragm 20 so as to close the upper end while allowing the piston rod 2 to pass therethrough. An annular member 26 which can be detached and seated on the valve stopper 35 is connected to the lower end of the valve stopper 35.

The lid member 25 has its outer periphery closely contacted with the inner periphery of the cylinder 1 with a seal 25a interposed therebetween. The lid member 25 is drawn from the outer peripheral side and the stopper 14 provided on the upper side. At the upper end of the cylinder 1.

The annular member 26 has an outer periphery slidably in contact with the inner periphery of the cylinder 1 with a seal 26a interposed therebetween, and has a cutout groove 26b formed in a lower end surface thereof opposed to the stopper 35. Have.

Therefore, an oil reservoir R is formed on the outer peripheral side of the metal diaphragm 20 so as to be separated from the rod-side oil chamber R1, and the inner peripheral side of the metal diaphragm 20 becomes the rod-side oil chamber R1.

The oil reservoir R in this embodiment communicates with the outside through a port 1a opened in the cylinder 1.

In this embodiment, the oil reservoir R is fixedly disposed on the cylinder 1 side, so that the slidability of the piston 3 is not reduced and the piston 3 is modified. There is an advantage of not inviting.

FIG. 6 shows another embodiment of the seat damper device according to the present invention. In this embodiment, the spring Sp and the adjusting cylinder Cy are connected to the upper frame F1.
And one end of a spring Sp is rotatably supported by one link member L1 constituting the X link L.

The base end of the adjusting cylinder Cy for locking the other end of the spring Sp is connected to and held by the upper frame F1.

In this embodiment, only the X link L and the damper D are provided between the upper frame F1 and the lower frame F2, and the spring Sp and the adjusting cylinder Cy are connected to the upper frame F1. Since it is provided, there is an advantage that the so-called foot portion of the seat using the seat damper device is refreshed in appearance.

In the above-described embodiment, the damper D has a gas chamber Rg defined by the free piston 4, and the piston side oil chamber R2 receives a back pressure by the gas pressure in the gas chamber Rg. According to the intention of the present invention, the damper D
May be formed in a double cylinder type so that a predetermined back pressure acts on the piston side oil chamber R2 by the gas pressure in the reservoir chamber.

[0087]

As described above, according to the present invention, the height of the damper can be adjusted independently of the spring force of the spring, and the oil sump of the compartment can be formed in the rod side oil chamber. Since the spring force of the spring is adjusted in conjunction with the supply and discharge control of the hydraulic oil in the above, there is an advantage that a desired height adjustment of the damper and a preferable spring force adjustment of the spring at that time can be simultaneously performed.

Further, according to this invention, the piston rod can be projected from the cylinder by the cooperation of the biasing force of the spring and the gas pressure. Therefore, the piston rod is set to be projected only by the gas pressure. Therefore, there is an advantage that there is no need to set the gas pressure to a so-called high value.

As a result, it is not necessary for the damper constituting the seat damper device to be formed in a robust structure so as to be able to hold a high gas pressure. Therefore, for example, a thin cylinder member or the like may be set. Therefore, there is an advantage that the weight of the entire seat damper device can be reduced, the cost can be reduced, and the versatility of the device can be expected.

[Brief description of the drawings]

FIG. 1 is an elevation view showing a seat damper device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a damper and an adjusting cylinder.

FIG. 3 is a partially enlarged longitudinal sectional view showing an embodiment of a valve.

FIG. 4 is a partially enlarged longitudinal sectional view showing another embodiment of the oil chamber.

FIG. 5 is a longitudinal sectional view showing a damper according to another embodiment.

FIG. 6 is an elevation view showing a seat damper device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Cylinder 3 Piston 41 Rod Body 43 Oil Chamber Cy Adjustment Cylinder D Damper F1 Upper Frame F2 Lower Frame G Floor L X Link P Pipeline R Oil Reservoir R1 Rod Side Chamber R2 Piston Side Oil Chamber Rg Gas Chamber S Sheet Sp Spring V Open / Close valve

Claims (1)

(57) [Scope of request for utility model registration] An upper frame connected to a lower end of a seat and a lower frame connected to a floor or the like are connected by an X link so that the upper frame can move up and down with respect to the lower frame. A damper disposed between the upper frame and the lower frame to exert a predetermined damping function, a spring for urging the upper frame in the ascending direction, and an adjustment disposed in series with the spring to allow the spring to expand and contract. And a cylinder, wherein a damper has a piston-side oil chamber defined by a piston in the cylinder, and expands in a sliding direction of the piston by supplying hydraulic oil from the outside while being defined by the piston in the cylinder. And a rod-side oil chamber that defines an oil sump chamber, wherein the adjusting cylinder is opened and closed by an external operation, and hydraulic oil from the outside when the opening and closing valve is opened And a rod body that protrudes outside when operating oil is supplied to the oil chamber and compresses the spring, and the oil reservoir chamber is opened when the on-off valve is opened. A seat damper device formed so as to communicate with the oil chamber via a pipe.