JP2020110246A - Standing auxiliary device and offset member - Google Patents

Abstract

To provide a standing auxiliary device capable of acquiring initial standing lift force by a gas spring even when a seat part is closed, and achieving a thin thickness.SOLUTION: A standing auxiliary device comprises: a seat part on which a top surface plate and a bottom surface plate are supported so as to oscillate freely; an oscillation mechanism stored in the storage part; and lock means for closing the seat part, the top surface plate is inclined by the oscillation mechanism for assisting standing of a person who is seated on the seat part. The oscillation mechanism has at least a gas spring for opening the seat part by protrusion of a piston rod which is supported to a rotary shaft, and at least one of one end and the other end of the gas spring is supported to the rotary shaft through an offset member for offsetting so that a rotary shaft core of the rotary shaft and a protrusion shaft core of the piston rod orthogonal to the rotary shaft core do not cross in a same plane.SELECTED DRAWING: Figure 1

Description

The present invention relates to a standing assistance device and an offset member, which is a standing assistance device that assists a user who sits on a top plate by tilting the top plate to stand up, and is laid on a seat surface of a chair or a wheelchair as necessary. The present invention relates to a stand-alone standing assistance device that can be used and an offset member suitable for the standing assistance device.

An elderly person who has weakened physical strength and a physically handicapped person who has some disorder in his legs and waist need not only a great deal of effort when standing up or sitting down from a chair or wheelchair, but also a risk of falling.

When an elderly person or a physically handicapped person (hereinafter referred to as “user” of the present invention) stands up from a chair or a wheelchair and transfers to, for example, a bed, it is necessary to reduce the burden on the legs and feet and be able to transfer safely. Further, when the user cannot transfer by himself/herself, a caregiver who takes care of the transfer is required.

However, the declining birthrate and aging of the population is progressing in Japan, and there is a tendency for elderly care to be provided at home. Further, in a nursing care facility or the like, one caregiver often deals with a large number of users, and the physical burden on the caregiver increases, which is not the case.

As a countermeasure to this problem, care robots are being developed, but it still takes a certain period of time to put them into practical use, and even if they are put into practical use, they are often widely used because of their high price. Have a problem.

From such a background, a device has been developed which is not so expensive and can assist the user to stand up simply by placing it on a seat of a chair or a wheelchair (for example, Patent Document 1).

The standing assistance chair of Patent Document 1 has a seat plate formed by a gas spring and a damper member of a low-resilience polyurethane foam having a thickness that is crushed by being sandwiched between the seat plate and the seat plate support when the user is seated. It is configured to be pushed up and tilted. In the region where the seat plate pushing-up moment by the gas spring is small, the pushing-up moment is obtained by the crushing reaction force of the low-resilience polyurethane foam.

Such an upright assisting device is generally made of a hard material such as stainless steel because of its rigidity. As a result, it is uncomfortable to sit, so it is usual to lay a cushion such as a sponge on the upright assisting device.

However, the stand-up auxiliary chair of Patent Document 1 uses a thick damper member of low-resilience polyurethane foam in order to obtain a sufficient crushing reaction force. Therefore, not only is the standing-up assisting device itself thick and the seat surface height high, but since a cushion is further laid on it, the height from the floor becomes too high, and a comfortable seating cannot be secured. There is a problem. In particular, a short user may fall on the contrary if he/she stands up by using the standing assistance device with his/her feet floating from the floor.

There is also a method in which a caregiver inserts a standing assistance device between the user's buttocks and a chair (including a wheelchair) to assist standing up only when standing up. It becomes difficult.

Therefore, the problem of the thickness of the standing up assisting device is an important problem for users and caregivers. In this case, the height of the chair or wheelchair can be designed in consideration of the thickness of the standing assistance device if the standing assistance device is integrally assembled to the chair or the wheelchair. However, it is a stand-alone type that can be used by placing it on the chair or the seating surface of a wheelchair, or by the caregiver inserting a standing assistance device between the user's buttocks and the chair (including the wheelchair) as necessary. In the case of the stand-up assistance device, the thickness of the stand-up assistance device is particularly important.

The applicant of the present invention has proposed a chair seat surface having a stand-up assist function shown in Patent Document 2 as an independent stand-up assist device. The standing assist device of Patent Document 2 is configured to push up the seat surface and incline it by using a gas spring and a torsion spring having a torsion spring position adjusting plate that works together with the gas spring to push up the seat surface and adjust the pushing moment. Has become.

Utility model registration No. 310083 Japanese Patent No. 5807311

By the way, in consideration of a short user or a caregiver who inserts a standing assistance device between the buttocks and a chair (including a wheelchair) of the user only when standing up to assist standing up, a stand-alone stand-up is provided. The upper limit of the thickness of the auxiliary device is preferably 20 mm.

However, the standing assistance device of Patent Document 2 cannot reduce the thickness to 20 mm or less. The reason for this is that, as described above, in order for the user to smoothly perform the operation of standing up from the state where the user sits on the standing assistance device placed on the chair (including the wheelchair), the seat surface in the initial stage of the user's standing up is closed as described above. In a region where the seat surface tilt is small from the state, a sufficient swinging force (hereinafter, referred to as "initial standing lifting force") is required to smoothly tilt the seat surface against the load of the user.

In the case of Patent Document 2, the seating surface is lifted by the cooperation of the torsion spring and the gas spring, but in order for the piston rod of the gas spring to perform the projecting operation, the seating surface is opened to the bottom plate as much as possible. There is a need. That is, when the seat surface is completely closed, the gas spring is in the state of a tension rod and the piston rod does not protrude, so that the gas spring cannot obtain the initial standing uplifting force.

Therefore, in the case of Patent Document 2, it is necessary to obtain the initial standing uplifting force with a torsion spring, and it is necessary to use a torsion spring having a large wire diameter. As a result, the winding diameter of the torsion spring is increased, and the thickness of the standing up assist device is inevitably greater than 20 mm.

The present invention has been made in view of such circumstances, and it is possible to obtain an initial standing uplifting force by the cylinder device even when the seating portion is closed, so that it is possible to realize a thin thickness that has never been achieved. It is an object of the present invention to provide a stand-alone stand-up assisting device that can perform the above-mentioned operation and an offset member suitable for the stand-up assisting device.

In order to achieve the above-mentioned object, a stand-up assist device of the present invention comprises a seating portion in which front end portions of a top plate and a bottom plate, which are vertically stacked, are swingably connected to each other, and a top plate with respect to the bottom plate. A swinging mechanism that swings the seat to swing open and close, and locking means that locks the swinging operation of the swinging mechanism to lock the seating portion in a closed state. The moving mechanism operates to lift the rear end of the top plate and incline the top plate to assist the person sitting in the seating part to stand up. Is rotatably supported, the other end is rotatably supported by the bottom plate, and at least a cylinder device is provided which swings in the direction in which the seat is opened when the piston rod projects. At least one of the ends is supported by the rotary shaft through an offset member that is offset so that the rotary shaft core of the rotary shaft and the projecting/retracting shaft core of the piston rod orthogonal to the rotary shaft core do not intersect on the same plane. It is characterized by being done.

According to the present invention, at least one of the one end and the other end of the cylinder device is configured so that the rotation axis of the rotation axis and the retractable axis of the piston rod orthogonal to the rotation axis do not intersect on the same plane. The rotary shaft is supported by an offset offset member.

As a result, even when the seating portion is completely closed, the initial standing lifting force for opening the seating portion acts on the cylinder device. That is, by rotatably supporting the cylinder device on the rotation shaft via the offset member, the rotation device swings in the direction of opening the seat in addition to the horizontal component force acting as a strut rod on the rotation device. It is possible to generate a vertical component force that is power.

Therefore, even if the seating portion is completely closed, the cylinder device can be prevented from being in the state of a strut rod. Accordingly, since the cylinder device having a large swinging force can be used to obtain the initial standing uplifting force, the thickness of the standing up assisting device can be made as thin as possible. As a result, it is possible to realize a stand-up assisting device having a thin thickness which has never been achieved.

In the aspect of the present invention, offset members are provided at both one end and the other end of the cylinder device, and the first offset member on the upper surface plate side offsets the retractable shaft core to the upper surface plate side with respect to the rotation shaft core, and the bottom plate. It is preferable that the second offset member on the side offset the protruding/retracting axis toward the bottom plate with respect to the rotation axis. Thereby, both ends of the cylinder device can be offset in good balance with respect to the rotating shaft.

In the aspect of the present invention, when an offset amount is a separation distance between a rotary shaft core of a rotary shaft that does not intersect on the same plane and a retractable shaft core of a piston rod, a total offset amount of one end and the other end of the cylinder device. Is preferably 4 mm or more and 8 mm or less.

If the total offset amount is less than 4 mm, a sufficient initial lifting force cannot be obtained. Further, if the total offset amount exceeds 8 mm, an excessive force is applied to the cylinder device, so that the piston rod is particularly likely to be damaged.

The offset member may be provided on at least one of the one end and the other end of the cylinder device. For example, the offset amount on the one end side of the cylinder device may be 8 mm, the offset amount on the other end side may be 0 mm, and vice versa. The offset amount may be 8 mm and the offset amount on one end side may be 0 mm.

In the aspect of the present invention, it is preferable that a rectangular thin plate-shaped space is provided between the top plate and the bottom plate that are vertically overlapped with each other, and the swinging mechanism is housed in the space when the seat portion is closed. ..
The standing assistance device of the present invention may have a structure in which the swinging mechanism is provided outside the seating portion. For example, a rotary shaft on one end side is projected to a side part of the top plate, a rotary shaft on the other end side is projected to a side part of the bottom plate, and a pair of rotary shafts is connected to one end side of the cylinder device via an offset member. The other end can also be swingably connected.
However, by allowing the swinging mechanism to be housed in the space of the seating portion with the seating portion closed, the appearance of the standing assistance device can be refreshed. In this case, by providing an offset member, it is possible to prevent the cylinder device from becoming a tension rod even when the seating part is completely closed.Therefore, when the seating part is completely closed, it is possible to store the cylinder device in a rectangular thin plate shape. If there is a space of. Therefore, the standing up assist device can be made thinner than ever before.
As a merit of providing the swinging mechanism on the outer side of the seat portion, the cylinder diameter can be made larger than when the cylinder device is housed in the space. As a result, it is possible to use a cylinder device having a large swinging force for swinging the seating portion as compared with the case where the cylinder device is housed in the space.
In the aspect of the present invention, the swing mechanism includes a first arm whose one end is rotatably supported by a rotary shaft provided on the inner side surface of the top plate and a rotary shaft provided on the inner side surface of the bottom plate. The other end of which is rotatably supported at one end and the other end of which is rotatably connected by a rotating pin are provided so as to be foldable in conjunction with the swing of the seat portion, and the seat portion is closed. In the state, it comprises a link mechanism in which the first arm and the second arm are folded in a straight line, and a link urging means for urging the link mechanism in the direction of expanding from the folded state, and cooperates with the cylinder device. It is preferable that the apparatus further includes a swing assisting means for opening the seating portion, and the swinging assisting means and the cylinder device are arranged in parallel in a space of the seating portion along a swinging direction of the seating portion.

As described above, by further providing the swing assisting means for performing the opening operation of the seat portion in cooperation with the cylinder device, the initial standing uplifting force by the cylinder device can be assisted. In this case, since the cylinder device can exert the main initial standing-up lifting force, it is not necessary to use, for example, a torsion spring having a large wire diameter and a large winding diameter as the link urging means of the swing assisting means.

Further, since the swing assisting means and the cylinder device are arranged in parallel in the space of the seating portion along the swinging direction of the seating portion, even if the swinging assisting means is additionally provided, the standing up assisting device is thin. The thickness can be maintained. Therefore, a large initial standing uplifting force can be obtained while maintaining a small thickness, and thus a standing up assist can be smoothly performed even when a heavy user uses the standing up assistance device.

In the aspect of the present invention, it is preferable that the swing assisting means is provided on the rear end side and the front end side of the seating portion, respectively. This makes it possible to assist the initial standing uplifting force by the cylinder device with a force greater than that in the case of one swing assisting device. Therefore, since a larger initial standing uplifting force can be obtained while maintaining a small thickness, it is possible to smoothly assist the standing up even when a heavier user uses the standing up assistance device.
In the aspect of the present invention, the locking means is provided on the inner surface of the rear end portion of the top plate and on the inner surface of the rear end portion of the bottom plate, and is provided on the lock bar when the seat portion is closed. An engagement member having an engagement groove formed therein, a slide mechanism for slidably supporting the engagement member in the front-back direction of the seat, and a lock for biasing the engagement member toward the rear end of the seat. The urging means and the lock releasing means for releasing the engagement between the lock bar and the engaging groove of the engaging member by sliding the engaging member to the front end side of the seating portion. Preferably has an inclined portion with which the lock bar abuts and slides the engaging member toward the front end portion against the locking biasing means when the upper surface plate is swung in the direction in which the seat portion closes.
This illustrates one of the preferable embodiments of the locking means.

In the aspect of the present invention, the cylinder device is preferably a gas spring.
As the cylinder device using the offset member, a gas spring can be preferably used, but in addition to the gas spring, it can be widely used for a cylinder device in which the piston rod is retracted by pneumatic pressure, hydraulic pressure, electric (motor), or the like.
In the aspect of the invention, it is preferable that the link urging means of the swing assisting means is any one of a torsion spring, a mainspring spring, a leaf spring, and a coil spring. The torsion spring and the mainspring spring may be attached either by the pivot pin of the link mechanism or the pivot shaft of the seat portion, but a larger pivot force can be obtained by attaching them to the pivot pin of the link mechanism.

In the aspect of the present invention, the upper limit of the thickness of the standing up assisting device is preferably 20 mm.

This is a stand-alone user, considering that the caregiver inserts a standing assistance device between the buttocks and the chair (including the wheelchair) of the user only when standing up to assist standing up. This is because the upper limit of the thickness of the standing up assisting device is preferably 20 mm.

In order to achieve the above-mentioned object, the offset member of the present invention has a pair of rotary shafts provided on the inner side surfaces of the top plate and the bottom plate that are swingably connected and supported, and both ends thereof are rotatable. An offset member that is used in a cylinder device that swings an upper surface plate when the piston rod is projected and retracted while being supported by, and that is an offset member that connects an end portion of the cylinder device in the retracted direction and a rotating shaft, wherein the offset member is The rotary shaft has a through hole and a connecting hole that is orthogonal to the through hole and connects the end of the cylinder device. The through hole penetrates the rotary shaft and the connecting hole connects the end of the cylinder device. It is characterized in that, when connected, the rotation axis of the rotation axis and the projecting/retracting axis of the piston rod orthogonal to the rotation axis do not intersect on the same plane.

According to the offset member of the present invention, both ends are rotatably supported by a pair of rotary shafts provided on the inner side surfaces of the top plate and the bottom plate, which are swingably connected and supported, and the piston is By using it in a cylinder device that swings the top plate when the rod appears and retracts, the cylinder device has an initial standing lifting force for swinging the top plate in the opening direction even when the top plate and the bottom plate are closed. Works.

In the offset member of the present invention, the cylinder device is preferably a gas spring.

Since the standing-up assisting device of the present invention can obtain the initial standing-up lifting force by the cylinder device even when the seating portion is closed, it is possible to realize a thin thickness that has never been seen before.

Further, the offset member of the present invention can exert an initial standing lifting force for swinging the cylinder device in the opening direction of the cylinder device even when the top plate and the bottom plate are closed.

The perspective view when the standing up assistance device of the present invention is opened. Top view and side view when the standing up device of the present invention is closed The side view when the standing up assistance device of the present invention is opened. Perspective view illustrating the offset member of the present invention Explanatory drawing explaining the action of the offset member A side view of a case where a leaf spring is used as a link urging means of a swing assisting device in the standing up assisting device of the present invention. Side view when the swing assist means is provided on both the rear end side and the front end side in the standing up assist device of the present invention Explanatory drawing for placing the standing up assistance device of the present invention on the seating surface of the chair to assist the user in standing up

Hereinafter, preferred embodiments of a standing assistance device and an offset member according to the present invention will be described in detail with reference to the accompanying drawings.

In the embodiment of the present invention, the case where the offset member of the present invention is applied to the standing up assist device of the present invention will be described, but the present invention is not limited to this.
Further, in the standing assistance device of the present invention, a swing mechanism for swinging the seat portion can be provided outside the seat portion, but in the present embodiment, the swing mechanism is housed in the space of the seat portion. An example will be described. Further, in the present embodiment, an example of a gas spring will be described as a cylinder device that is a component of the swing mechanism.

[Standing assistance device]

FIG. 1 is a perspective view when the standing up assistance device of the present invention is opened. Further, FIG. 2A is a top view when the standing up assist device of the present invention is closed, and FIG. 2B is a side view. Further, FIG. 3 is a side view when the standing up assistance device of the present invention is opened.

However, in FIG. 1, in order to make the internal structure of the standing up assisting device easy to understand, it is shown in a diagram opened larger than the maximum inclination angle (about 30°) of the seating portion 12 of the standing up assisting device 10 shown in FIG. Further, in FIG. 2A, the upper plate 20 is omitted for easy understanding of the internal structure of the standing up assist device 10. In FIG. 2B, one side of the upper plate 20 and the bottom plate 22 is shown. The side portions 20B and 22B are excluded from the illustration.

As shown in FIGS. 1 to 3, a standing assistance device 10 according to an embodiment of the present invention mainly locks a seating portion 12, a swinging mechanism 14 that swings and opens the seating portion 12, and a swinging mechanism 14. It is composed of the lock means 16.

(Seating part)

The seating portion 12 is composed of a top surface plate 20 and a bottom surface plate 22 that have a rectangular thin plate-shaped space 18 (see FIG. 2B) in the vertical direction and are overlapped with each other. The portion is swingably connected and supported by a swing shaft 24.

Here, when the user of the standing up assistance device 10 (for example, an elderly person or a physically handicapped person) sits down on the seating portion 12 of the standing up assistance device 10, the front end portion is the front side and the back side is the rear side. Say the front end of when. The front end portion is not limited to the seating portion 12, and is used for a member that constitutes the standing up assistance device 10. Further, the direction orthogonal to the front-rear direction will be referred to as the width direction.

The upper surface plate 20 is a flat seating surface flat portion 20A on which a user M (see FIG. 8) who uses the standing up assistance device 10 of the embodiment of the present invention sits, and the seating surface flat portion 20A extends downward at right angles to both sides in the width direction. It is composed of bent side portions 20B, 20B. The bottom plate 22 includes a flat bottom flat portion 22A and side portions 22B and 22B that are bent upward at right angles on both sides of the bottom flat portion 22A in the width direction. Further, the swing shaft 24 penetrates and supports the front ends of the side portions 20B on both sides of the top plate 20 and the front ends of the side portions 22B on both sides of the bottom plate 22, so that the top plate 20 and the bottom plate 20 are connected to each other. Is swingably connected. Thereby, the seating portion 12 is formed.

Then, when the seating portion 12 is closed, the side portions 20B, 20B on both sides of the top plate 20 cover the outsides of the side portions 22B, 22B on both sides of the bottom plate 22 so that the top plate 20 and the bottom plate 22 are separated from each other. A rectangular thin plate-shaped space 18 is formed therebetween.

Further, when the seat portion 12 is closed on the bottom plate 22 and the side portion 20B of the top plate 20 covers the outside of the side portion 22B of the bottom plate 22, the rotation shaft 30 and the lock of the swing mechanism 14 are locked. Recessed cutouts 22C and 22D for preventing the lock bar 62 of the means 16 from hitting the side edge portion 22B of the bottom plate 22 are formed.

Further, as shown in FIG. 1 and FIG. 2(A), the seating portion 12 is formed to be shorter in the width direction than in the front-rear direction and convenient for carrying and carrying. The length of the seating portion 12 in the width direction may be a width that allows the user M to sit on it, and is preferably about half the seating surface width of the chair, for example.

(Swing mechanism)

The swinging mechanism 14 swings the top plate 20 with respect to the bottom plate 22 to swing and open and close the seat portion 12, and mainly includes a gas spring 26 (an example of a cylinder device) and a swing assisting means 28. Composed. The standing up assist device 10 of the present invention is established if at least the gas spring 26 is provided as the swing mechanism 14, but in the embodiment of the present invention, the gas spring 26 and the swing assisting means 28 are combined. This will be described below.

As shown in FIG. 2A, in the swing mechanism 14, the gas spring 26 and the swing assisting means 28 are arranged in parallel in the space 18 of the seat 12 along the swing direction of the seat 12. There is. By thus preventing the gas spring 26 and the swing assisting means 28 from overlapping with each other, the standing up assisting device 10 is made thinner.

Note that the gas spring 26 and the swing assisting means 28 may be arranged in parallel on either side of the seating portion 12 in the width direction, and in FIG. 2A, FIG. 3, FIG. 6, and FIG. 7 are cases where they are arranged on the left side.

The gas spring 26 is rotatably supported at one end in the longitudinal direction (front-rear direction) by a rotating shaft 30 provided on the inner side surface (the surface on the side of the space 18) of the top plate 20 and the space of the bottom plate 22. The other end is rotatably supported by a rotary shaft 32 provided on the 18 side.
In addition, in the present embodiment, the rotary shaft 30 on one end side of the gas spring 26 and the rotary shaft 30 of the link mechanism 48, which will be described later, are also used, but they may be separately provided. Further, the gas spring 26 is a spring in which the piston rod 26A emerges from the body portion 26C by utilizing the reaction force of the compressed gas filled in the sealed body portion 26C.

As a result, the piston rod 26A projects from the body portion 26C to open the seat portion 12. The rotary shaft 30 is provided at the rear end position of the upper plate 20, and is supported by the side portions 20B, 20B on both sides of the upper plate 20. On the other hand, the rotating shaft 32 is provided at the front end position of the bottom plate 22, one end of the rotating shaft 32 is supported by the side portion 20B, and the other end is between the gas spring 26 and the swing assisting means 28. The bottom plate 22 is supported by a support member 34 provided upright on the bottom flat portion 22A.

Then, as shown in FIG. 1, both ends in the length direction of the gas spring 26 are provided with a rotation axis S1 of the rotation shafts 30 and 32 and a retractable axis S2 of the piston rod 26A orthogonal to the rotation axis S1. Are supported by the rotating shafts 30 and 32 via offset members 36 (36A and 36B) that offset so that they do not intersect on the same plane.

Although the offset members 36 are provided at both ends in the length direction of the gas spring 26 in the present embodiment, the present invention also includes the case where the offset members 36 are provided at either one of them.

Further, the gas spring 26 is formed such that the diameter of the body portion 26C is smaller than the height of the space 18 of the seat 12 (the distance between the top plate 20 and the bottom plate 22 when the seat 12 is closed). .. As a result, the gas spring 26 can be housed in the space 18 of the seat 12 in the closed state.

(Offset member)

FIG. 4 shows the offset member 36 according to the embodiment of the present invention, which is used in the standing assistance device 10 according to the embodiment of the present invention.

Both ends of the offset member 36 are rotated by a pair of rotation shafts 30 and 32 provided on the inner side surfaces (the side of the space 18) of the top plate 20 and the bottom plate 22 that are swingably connected. It is used in a cylinder device that is freely supported and swings the upper surface plate 20 by the piston rod 26A protruding and retracting, and connects the end of the cylinder device in the retracting direction and the rotating shaft 30 or 32. Has a through hole 42 through which the rotary shaft 30 or 32 penetrates, and a connecting hole 38 that connects the end of the cylinder device and is orthogonal to the through hole 42, and penetrates the rotary shaft 30 or 32 through the through hole 42. When the end of the cylinder device is connected to the connecting hole 38, the rotation axis S1 of the rotation axis 30 or 32 and the retractable axis S2 of the piston rod 26A orthogonal to the rotation axis S1 are on the same plane. Do not cross at.

As the cylinder device, the gas spring 26 used in the standing up assist device 10 according to the embodiment of the present invention can be preferably used. However, in addition to the gas spring 26, the piston rod is retracted by pneumatic pressure, hydraulic pressure, electric (motor), or the like. It can also be widely used for cylinder devices that operate.

In FIG. 4, two types of offset members 36 are illustrated as the offset member 36 of the present invention.

4A is an L-shaped offset member 36, and the tip end of the piston rod 26A of the gas spring 26 or the connecting rod 26B is connected in the direction of the retracting axis S2 of the piston rod 26A of the gas spring 26. The rotating shaft 30, the connecting portion 40 having the connecting hole 38 and the rotating shaft S1 in a direction orthogonal to the protruding/retracting shaft S2 and not intersecting with the protruding/retracting shaft S2 on the same plane. It is formed in an L shape with the rotation support portion 44 in which 32 through holes 42 are formed. In addition, the plane including the protruding/retracting axis S2 and the plane including the rotating axis S1 are formed in parallel.

FIG. 4B shows a U-shaped offset member 36, and the tip end of the piston rod 26A of the gas spring 26 or the connecting rod 26B is connected in the direction of the retracting axis S2 of the piston rod 26A of the gas spring 26. The plate-like connecting portion 40 in which the connecting hole 38 is formed and the rotating shaft S1 having a rotating shaft core S1 that is orthogonal to the protruding/retracting shaft core S2 and does not intersect with the protruding/retracting shaft core S2 on the same plane. The two plate-shaped rotation supporting portions 44 and 44, in which the through holes 42 of 30 and 32 are respectively formed, are formed in a U shape.

4A and 4B, the plane including the protruding/retracting axis S2 and the plane including the rotating axis S1 are formed parallel to each other.

In the present embodiment, the offset member 36 having an L-reverse shape will be described, but the shape of the offset member 36 is limited to the shape shown in FIG. 4 as long as it has an action (described below) as the offset member 36. Not done.

FIG. 5A is a diagram in which both ends of the gas spring 26 are rotatably supported by the rotary shafts 30 and 32 via the first offset member 36A and the second offset member 36B. Further, FIG. 5B is a view of a conventional connecting structure for connecting both ends of the gas spring 26 to the rotating shafts 30 and 32 in order to explain the action of the offset member 36.

Note that FIG. 5 shows the seat 12 closed, and a swing shaft 24 (not shown in FIG. 5) for swingably connecting and supporting the top plate 20 and the bottom plate 22 is provided on the left side of FIG. To be

As shown in FIG. 5A, in the gas spring 26, a male screw 46 is engraved on the tip of a piston rod 26A provided on one end side, and the tip of a connecting rod 26B is formed on the other end side. A male screw 46 is engraved on the. On the other hand, a female screw (not shown) to be engaged with the male screw 46 of the gas spring 26 is engraved in the connecting hole 38 of the first and second offset members 36A and 36B. As a result, the first and second offset members 36A and 36B are attached to both ends of the gas spring 26, and the gas spring 26 can be rotatably supported by the rotary shafts 30 and 32 via the offset members 36A and 36B. ..

As shown in FIG. 5(A), when the offset members 36 are provided at both ends of the gas spring 26, the first offset member 36A supported on the upper surface plate 20 side has a retractable axis center with respect to the rotation axis S1. Offset S2 to the top plate 20 side. On the other hand, the second offset member 36B on the bottom plate 22 side offsets the retractable shaft core S2 to the bottom plate 22 side with respect to the rotation shaft core S1.

Here, the offset means providing a deviation so that the rotation axis S1 and the retracting axis S2 do not intersect on the same plane, and the separation distance caused by the deviation is referred to as an offset amount L (L1, L2). ..

The offset amount L of the offset member 36 in the upright assisting device 10 of the present invention is one end and the other end of the gas spring 26, that is, the total L1+L2 of the offset amounts L of the first and second offset members 36A and 36B is 4 mm or more and 8 mm. The following is preferable.

The offset amount L can also be represented by an inclination θ with respect to the retractable axis S2 of the gas spring 26. For example, when the gas spring 26 having a length of 145 mm is used, the sum L1+L2 of the offset amounts L is 4° when the inclination angle θ (tan θ) is 2°, and 8 mm is 3.16°. That is, when the offset amount L is represented by the inclination θ of the gas spring 26 with respect to the retractable shaft center S2, it is preferably 2° or more and 3.16° or less.

<Operation of offset member>

As shown in FIG. 5A, the seat portion 12 is locked by the locking means 16 by rotatably supporting both ends of the gas spring 26 on the rotating shafts 30 and 32 through the offset members 36A and 36B. Even in the closed state, the oscillating force in the direction of opening the seat 12 is potentially acting around the rotating shafts 30, 32 due to the projecting force of the piston rod 26A of the gas spring 26.

That is, by supporting the gas spring 26 on the rotary shafts 30 and 32 through the offset member 36, the gas spring 26 is horizontally supported around the rotary shafts 30 and 32 in addition to the horizontal component force F1 that acts as a tension rod. A vertical component F2 perpendicular to the component F1 is generated. Due to the horizontal component force F1 and the vertical component force F2, a resultant force F3 that is a swinging force that opens the seat 12 is generated around the rotation shafts 30 and 32. As a result, a diagonally upward resultant force F3 that lifts the upper plate 20 is generated on the first offset member 36A that is rotatably supported by the rotating shaft 30 on the upper plate 20 side.

On the other hand, a resultant force F3 that pushes the bottom plate 22 obliquely downward is generated around the rotation shaft 32 on the second offset member 36B that is rotatably supported by the rotation shaft 32 on the bottom plate 22 side. As a result, the seat 12 is subjected to a swinging force that attempts to swing around the swing shaft 24 that swingably supports the top plate 20 and the bottom plate 22. That is, even if the seating portion 12 is closed, the gas spring 26 has a latent initial standing-up force. Therefore, by unlocking the locking means 16, the seating portion 12 swings in the opening direction.

In this way, the upright assisting device 10 of the present invention can prevent the gas spring 26 from being in the state of a tension rod even when the seating portion 12 is closed. Therefore, the gas spring 26 having a large swinging force can be used to obtain the initial standing lifting force.

Accordingly, the space 18 having a rectangular thin plate shape is sufficient to accommodate the gas spring 26 when the seat 12 is closed, and the thickness of the standing up assistance device 10 can be made as thin as possible. Therefore, it is possible to realize a stand-up assisting device 10 having a thin thickness that has never been achieved, and specifically, the upper limit of the thickness of the stand-up assisting device 10 of 20 mm can be achieved.

As described above, the total offset amount L1+L2 of the offset amounts L of the first and second offset members 36A and 36B is preferably 4 mm or more and 8 mm or less. This means that if the total offset amount is less than 4 mm, a sufficient initial lifting force cannot be obtained. If the total offset amount exceeds 8 mm, an unreasonable force is applied to the gas spring 26, so that the piston rod 26A and the connecting rod 26B of the gas spring 26 are particularly likely to be damaged.

The offset member 36 may be provided on at least one of the one end and the other end of the gas spring 26. For example, the offset amount on one end side of the gas spring 26 may be 8 mm and the offset amount on the other end side may be 0 mm. The offset amount on the other end side may be 8 mm and the offset amount on the one end side may be 0 mm.

On the other hand, in the conventional connecting structure of the gas spring 26 and the rotating shafts 30 and 32 of FIG. 5B, the connecting member 48 connects the rotating shaft core S1 of the rotating shafts 30 and 32 and the retractable shaft core of the gas spring 26. S2 intersects on the same plane. Therefore, when the seating portion 12 is completely closed, only the horizontal component force F1 in which the gas spring 26 acts as a bracing rod is generated. That is, in the case of the conventional connection structure, the gas spring 26 does not operate unless the seat 12 is slightly open. Therefore, as described in Patent Document 2, for example, a damper member of polyurethane foam, a torsion spring, or the like for obtaining the initial standing lifting force is required.

(Rotation assisting means)

As shown in FIGS. 1 to 3, the swing assisting means 28 assists the initial standing and lifting force of the gas spring 26, and is a foldable link mainly linked to the swing of the upper plate 20. It is composed of a mechanism 48 and a link urging means 50 for urging the link mechanism 48 in the direction in which the link mechanism 48 is expanded from the folded state.

<Link mechanism>

The link mechanism 48 includes a first arm 52 whose one end is rotatably supported by a rotary shaft 30 provided on the inner surface of the top plate 20 (the surface on the space 18 side) and the inner surface of the bottom plate 22 (the space). The second arm 56, which has one end rotatably supported on a rotary shaft 54 provided on the 18th surface), has the other end rotatably connected by a rotary pin 58. In the link mechanism 48 in the present embodiment, the same rotary shaft 30 as the gas spring 26 is used as the rotary shaft 30 provided on the inner side surface of the upper plate 20, but it may be provided separately.

As shown in FIG. 1, the first arm 52 is formed in a shape in which a pair of parallel arm plates 52A, 52A are connected by a connecting plate 52B shorter than the arm plate 52A, and is connected to one end of the pair of arm plates 52A, 52A. The moving shaft 30 penetrates. Similarly, the second arm 56 is formed in a shape in which a pair of parallel arm plates 56A, 56A are connected by a connecting plate 56B shorter than the arm plate 56A, and the rotary shaft 54 is provided at one end of the pair of arm plates 56A, 56A. Penetrates. One end of the rotating shaft 54 is supported by the side portion 22B of the bottom plate 22, and the other end is supported by a support member 60 that stands on the bottom flat portion 22A of the bottom plate 22. The other end of the pair of arm plates 52A, 52A and the other end of the pair of arm plates 56A, 56A are rotatably supported by the rotating pin 58.

The width of the arm plate 52A of the first arm 52 and the width of the arm plate 56A of the second arm 56 (width in the direction in which the seat 12 swings) is the height of the space 18 of the seat 12 (the seat 12 closes). It is formed so as to be smaller than the distance between the top plate 20 and the bottom plate 22 when it is opened.

Accordingly, the link mechanism 48 is provided so as to be foldable in association with the swing of the upper surface plate 20, and as shown in FIG. 2B, when the seating portion 12 is closed, the first arm 52 and the second arm 52 are provided. The arm 56 and the arm 56 are folded in a straight line and housed in the space 18 of the seat 12.

Further, the pair of arm plates 52A, 52A of the first arm 52 has a concave cutout 52C (see FIG. 1) so that the arm plate 52A does not hit the rotating shaft 54 when the link mechanism 48 is folded in a straight line. (See) is formed.

<Link urging means>

In the standing up assisting device 10 of FIGS. 1 to 3, as the link urging means 50, a torsion spring (torsion spring) 50A is shown as an example. That is, the torsion spring 50A is wound around the rotating pin 58 of the link mechanism 48, one end of the torsion spring 50A is abutted and supported by the connecting plate 52B of the first arm 52, and the other end is connected to the connecting plate 56B of the second arm 56. Abutted and supported. The torsion spring 50A applies a biasing force to the link mechanism 48 in the expanding direction.

The diameter of the torsion spring 50A wound around the rotating pin 58 is formed so that it can be housed in the space 18 of the seating portion 12 in the closed state.

The rotary shafts 30 and 54 of the first arm 52 and the second arm 56 of the link mechanism 48 are arranged on the front end side of the seat 12. As a result, when viewed on the principle of leverage with the pivot pin 58 as the fulcrum and the pivot shafts 30 and 54 as the points of action, the point of application of the force exerted by the torsion spring 50A, that is, the point of action of the force in the direction of opening the seat 12 is It is on the front end side of the seat 12. Therefore, a large swinging force in the opening direction can be exerted on the seat portion 12.

The torsion spring 50A may be attached either by the rotating pin 58 of the link mechanism 48 or by the swing shaft 24 of the seating portion 12, but the principle of leverage is more efficient when it is attached to the rotating pin 58 of the link mechanism 48. Since it can be used as desired, a larger swinging force can be obtained. A spring spring (not shown) may be used instead of the torsion spring 50A.

FIG. 6 shows a case where a V-shaped plate spring 50B is used as another mode of the link urging means 50.

As shown in FIG. 6, the leaf spring 50B is in the vicinity of the rotation shaft 54 of the second arm 56 of the link mechanism 48, and connects the bottom flat portion 22A of the bottom plate 22 and the connecting plate 56B of the second arm 56. It is provided between. That is, one side of the V-shape of the leaf spring 50B is supported by the bottom flat portion 22A of the bottom plate 22, and the other side is supported by the connecting plate 56B of the second arm 56.

Although not shown, the leaf spring 50B may be provided in the vicinity of the rotating pin 58 and between the connecting plate 52A of the first arm 52 and the connecting plate 56A of the second arm 56.

In this way, by using the leaf spring 50B as the link urging means 50, it is possible to obtain a larger swinging force for swinging the seat 12 than the torsion spring 50A.

(Locking means)

As shown in FIGS. 1 to 3, the locking means 16 locks the swinging motion of the seat 12 to lock the seat 12 in the closed state, and mainly includes the lock bar 62 and the engaging member 64. The slide mechanism 66, the biasing means 68 for locking, and the unlocking means 70.

The lock bar 62 is formed in a round bar shape, is provided on the inner side surface of the rear end portion of the upper surface plate 20, and is supported by both side portions 20B, 20B of the upper surface plate 20.

The engagement member 64 engages with the lock bar 62, and is supported on the inner surface of the rear end of the bottom plate 22 via a slide mechanism 66. The engaging member 64 is notched at the central portion of the upper side of the rectangular shape, thereby forming an engaging groove 64A that engages with the lock bar 62 when the seat 12 is closed. Further, the notch of the engaging member 64 at the upper end side on the front end side has an inclined portion 64B inclined obliquely downward toward the rear end side.

The number of the engaging members 64 with which the lock bar 62 engages may be one, but in the present embodiment, the two engaging members 64, 64 are supported by the slide mechanism 66 at intervals in the width direction of the bottom plate 22. I decided to do it. Thereby, the structurally strong locking means 16 can be formed, and the seating portion 12 can be reliably locked.

The slide mechanism 66 supports the engagement member 64 slidably in the front-rear direction of the seating portion 12, and has a pair of long holes 66A formed to face both side portions 22B, 22B of the bottom plate 22. , 66A, and a slide rod 66B which penetrates and supports the engaging member 64 and whose both ends are engaged and supported by the pair of elongated holes 66A, 66A. The long hole 66A is formed in the side portion 22B of the bottom plate 22 as a long hole in the front-rear direction.

Note that the slide mechanism 66 can be made up of a pair of long holes 66A and one slide rod 66B, but in the present embodiment, it is made up of two pairs of long holes 66A and two slide rods 66B. That is, two pairs of long holes 66A are formed close to both side portions 22B of the bottom plate 22, and the slide rods 66B are engaged and supported by the two pairs of long holes 66A, respectively. Then, the two slide bars 66B are connected by the two engaging members 64. As a result, a structurally strong slide mechanism 66 can be formed, and the engagement member 64 can be smoothly and accurately slid.

The lock urging means 68 urges the engaging member 64 toward the rear end portion of the seat 12, and a tension spring or a rubber cord can be preferably used. The lock urging means 68 has one end fixed to the central portion of the slide rod 66B on the rear end side of the two slide rods 66B and the other end erected at the rear end of the bottom flat portion 22A of the bottom plate 22. It is fixed to the fixed plate 68A.

By forming the locking means 16 as described above, when the seating portion 12 is swung in the closing direction, the lock bar 62 comes into contact with the inclined portion 64B of the engaging member 64, so that the engaging member 64 is locked. The biasing means 68 slides to the front end side against the biasing force to the rear end side. When the lock bar 62 is disengaged from the inclined portion 64B, the lock bar 62 falls into the engagement groove 64A of the engagement member 64 and is engaged with the lock bar 62 by the locking biasing means 68. A biasing force acts on the rear end side. As a result, the swinging motion of the seat 12 can be locked and the seat 12 can be locked in the closed state.

As shown in FIG. 1, the lock releasing means 70 disengages the lock bar 62 from the engagement groove 64A of the engagement member 64 by sliding the engagement member 64 toward the front end of the seat 12. It unlocks.

That is, the unlocking means 70 includes a round bar-shaped release bar 70A rotatably supported by the side portions 22B, 22B on both sides of the bottom plate 22, and a release lever 70B provided on one side of the release bar 70A. The release bar 70A includes a release lever 70C and a cam plate 70D.

The release bar 70A is provided further on the rear end side than the slide bar 66B on the rear end side of the two slide bars 66B. The position of the top plate 20 corresponding to the position of the bottom plate 22 on which the release bar 70A is provided is a portion without the side portion 20A of the top plate 20, and the top plate 20 is released by the release bar 70A even when the seat 12 is closed. It does not hit the release lever 70B.

Further, one end of the release bar 70A projects outward from the side edge 22B of the bottom plate 22, and the base end of the release lever 70B is fixed to this projection. The distal end portion of the release bar 70B is formed thicker than the proximal end portion, and a grip portion 70C for the user M to grip the release lever 70B is formed.

Further, cam plates 70D, 70D (for example, an elliptical cam plate) having arc portions having a short distance and arc portions having a long distance from the axis of the release bar 70A are pierced and supported through the release bar 70A at intervals. There is. When the seating portion 12 is locked, that is, when the release lever 70B is lying down, the short arc portion of the cam plate 70D is in contact with the slide rod 66B.

Then, when the lock of the locking means 16 is released, the release lever 70B is lifted to rotate the release bar 70A. As a result, the long arc portion of the cam plate 70D contacts the slide rod 66B and pushes the slide rod 66B toward the front end portion of the seat 12. As a result, the engaging member 64 slides toward the front end portion of the seat 12, so that the lock bar 62 is disengaged from the engaging groove 64A of the engaging member 64 and the lock is released.

The number of cam plates 70D may be one, but in the present embodiment, two cam plates 70D are provided at intervals on the release bar 70A. Thereby, when the lock of the locking means 16 is released, the engagement member 64 can be reliably slid to the front end side of the seat 12.

(Another Mode of Swing Aid Means)

FIG. 7 shows another embodiment of the swing assisting means 28, which is a case of two rows of swing assisting means 28, 28B respectively arranged on the rear end side and the front end side of the seat 12. Therefore, the gas spring 26 and the two-row type rocking assisting means 28, 28B form the rocking mechanism 14.

Since the swing assisting means 28 provided on the rear end side has been described with reference to FIGS. 1 to 3, the description thereof is omitted. The swing assisting means 28B disposed on the front end side has the same structure as the swing assisting means 28 on the rear end side.

That is, the swing assisting means 28B includes a link mechanism 72 that is foldable in association with the swing of the upper surface plate 20, and a link urging means 74 that urges the link mechanism 72 in the direction in which the link mechanism 72 is expanded from the folded state. Composed of.

The link mechanism 72 includes a first arm 78 whose one end is rotatably supported by a rotary shaft 76 provided on the inner side surface of the top plate 20, and a rotary shaft 80 provided on the inner side surface of the bottom plate 22. The other end of the second arm 82, which is rotatably supported at one end, is rotatably connected by a rotation pin 84. Although a torsion spring is used as the link urging means 74 in FIG. 7, a spring, a leaf spring, or a coil spring may be used similarly to the swing assisting means 28 on the rear end side.

[How to use the standing up device]

As shown in FIG. 8A, the standing assistance device 10 according to the embodiment of the present invention is used only when the user M places it on the seat surface of the chair 86 or when the user M stands up from the chair. A caregiver (not shown) inserts it between the buttocks MA of the user M and the seat surface of the chair 86 for use.

In the case of such a use method, if the standing up assisting device 10 is thick, the height from the floor surface 88 becomes too high, and the foot MB of the user M easily separates from the floor surface 88, and a comfortable sitting feeling is obtained. There is a problem that can not be secured. In particular, when the short user M stands up with the foot MB floating from the floor surface 88 by using the standing assistance device 10, there is a risk of falling.

Even when the caregiver inserts the standing assistance device 10 between the buttocks MA and the chair 86 of the user M to assist the standing up only when the user stands up, the thickening of the standing assistance device 10 makes it difficult to insert the standing assistance device 10. Become.

However, in the standing assistance device 10 of the embodiment of the present invention, as described above, both ends of the gas spring 26 and the rotating shafts 30, 32 are connected via the offset member 36. As a result, even when the seating portion 12 is closed, the gas spring 26 does not act as a bracing rod as in the conventional case.

Therefore, as shown in FIG. 8B, when the user M stands up from the chair 86, the release lever 70B of the standing up assist device 10 is pivoted upward to unlock the seating portion 12 by the locking means 16. Only then, the initial standing and lifting force of the gas spring 26 acts on the seat 12. As a result, the seat plate 20 of the seating portion 12 swings upward to assist the user M in standing up.

As described above, the standing up assistance device 10 according to the embodiment of the present invention can obtain the initial standing uplifting force for starting the swinging of the seat 12 by the gas spring 26. Therefore, it is not necessary to use a torsion spring having a large wire diameter and a large winding diameter, which is different from the gas spring 26, in order to obtain the initial standing lifting force, unlike the conventional case. That is, the standing up assist device 10 according to the embodiment of the present invention has only to have the thickness of the space 18 of the seat portion 12 in which the diameter of the body portion 26C of the gas spring 26 can be stored. This makes it possible to make the standing-up assisting device 10 having an extremely thin thickness of 20 mm at the upper limit, so that the distance from the floor surface 88 to the top plate 20 of the standing-up assisting device 10 can be made almost the same as the seating surface of the chair 86. ..

Therefore, the user M can ensure a comfortable sitting and can smoothly insert the standing assistance device between the buttocks MA of the user M and the seating surface of the chair 86. it can.

Further, since the standing up assisting device 10 of the present invention is provided with the swing assisting means 28 for assisting the initial standing up lifting force of the gas spring 26, when the user M having a heavy weight uses the standing up assisting device 10. Can also assist in standing up smoothly. In this case, since the gas spring 26 mainly exerts the initial upright lifting force, it is not necessary to use, for example, a torsion spring having a large wire diameter and a large winding diameter as the swing assisting means.

Further, in the upright assisting device 10 of the embodiment of the present invention, the gas spring 26 and the swing assisting means 28 are arranged in parallel in the space 18 of the seat 12.

Thus, the provision of the swing assisting means 28 does not increase the thickness of the standing up assisting device 10.

The standing up assistance device 10 according to the embodiment of the present invention may be used not only for the chair 86 but also for a wheelchair. In addition, since it is thin and narrow, it is convenient to carry and can be used when a user or caregiver carries it and sits on a bench in the park.
Furthermore, since the standing assistance device 10 of the embodiment of the present invention is extremely thin, it can be used also as an assisting device for a nursing bed. For example, the standing assistance device 10 may be inserted between the back of a person sleeping on the bed and the bed, and the locking means may be released to be used as an aid for raising the upper body of the sleeping person. Further, the standing assistance device 10 can be inserted between the hips of a person who has raised the upper half of the body and the bed, and the locking means can be released to use the standing assistance device to rise from the bed to the floor.

DESCRIPTION OF SYMBOLS 10... Standing auxiliary device, 12... Seating part, 14... Oscillation mechanism, 16... Locking means, 18... Space, 20... Top plate, 20A... Seat flat part, 20B... Side part, 22... Bottom plate, 22A ... bottom flat part, 22B... side part, 22C, 22D... notch, 24... rocking shaft, 26... gas spring, 26A... piston rod, 26B... connecting rod, 26C... body part, 28... rocking assisting means , 30, 32... Rotating shaft, 34... Support member, 36 (36A, 36B)... Offset member, 38... Connection hole, 40... Connection portion, 42... Through hole, 44... Rotation support portion, 46... Male screw , 47... Linking member, 48... Link mechanism, 50... Link biasing means, 50A... Torsion spring, 50B... Leaf spring, 52... First arm, 52A... Arm plate, 52B... Connecting plate, 54... Rotating shaft , 56... Second arm, 56A... Arm plate, 56B... Connecting plate, 58... Rotating pin, 60... Support member, 62... Lock bar, 64... Engaging member, 64A... Engaging groove, 64B... Inclined portion, 66... Slide mechanism, 66A... Long hole, 66B... Slide rod, 68... Locking biasing means, 70... Lock releasing means, 70A... Release bar, 70B... Release lever, 70C... Gripping portion, 70D... Cam plate, 72 ... Link mechanism, 74... Link urging means, 76... Rotating shaft, 78... First arm, 80... Rotating shaft, 82... Second arm, 84... Rotating pin, 86... Chair, 88... Floor surface , S1... Rotation axis, S2... Emerging/retracting axis, F1... Horizontal component force, F2... Vertical component force, F3... Resultant force, M... User, MA... Buttocks, MB... Foot

Utility model registration No. 310983 Japanese Patent No. 5807311

Claims (12)

A seating portion in which front end portions of a top plate and a bottom plate which are vertically overlapped are swingably connected and supported,
A swing mechanism that swings and opens and closes the seat by swinging the top plate with respect to the bottom plate;
Lock means for locking the rocking motion of the rocking mechanism to lock the seating part in a closed state, and the rocking mechanism is operated by releasing the locking means, and the rear end portion of the top plate. A standing assistance device for assisting the standing of a person seated in the seat by lifting the and tilting the upper surface plate,
The swing mechanism is
At least a cylinder device is provided, one end of which is rotatably supported by the top plate and the other end of which is rotatably supported by the bottom plate, and which swings in a direction in which the seat portion is opened by a piston rod protruding. ,
At least one of one end and the other end of the cylinder device is an offset for offsetting so that the rotation axis of the rotation axis and the retracting axis of the piston rod orthogonal to the rotation axis do not intersect on the same plane. An uprighting assisting device, which is supported by the rotating shaft via a member. The offset member is provided on both one end and the other end of the cylinder device, and the first offset member on the side of the upper surface plate offsets the projecting/retracting axis toward the upper surface plate side with respect to the rotation axis, The upright assisting device according to claim 1, wherein the second offset member on the face plate side offsets the protruding/receiving axis toward the bottom plate with respect to the rotation axis. When the separation distance between the rotary shaft core of the rotary shaft and the projecting/retracting shaft core of the piston rod that do not intersect on the same plane is an offset amount, the total offset amount of one end and the other end of the cylinder device. Is 4 mm or more and 8 mm or less, The stand up assistance device according to claim 1 or 2. A rectangular thin plate-shaped space is provided between the top plate and the bottom plate that are vertically overlapped with each other, and the swinging mechanism is housed in the space when the seat is closed. The standing assistance device according to any one of 1 to 3. The swing mechanism is
One end is rotatably supported by a first arm, one end of which is rotatably supported on a rotary shaft provided on the inner side surface of the top plate, and one end is rotatably supported by a rotary shaft provided on the inner side surface of the bottom plate. The other end of the second arm and the second arm are rotatably connected to each other by a rotating pin so as to be foldable in conjunction with the swing of the seat portion, and the first arm when the seat portion is closed. And a link mechanism in which the second arm is folded in a straight line,
A link urging means for urging the link mechanism from the folded state in an unfolding direction, further comprising a swing assisting means for opening the seat portion in cooperation with the cylinder device,
The standing assistance device according to claim 4, wherein the swing assisting device and the cylinder device are arranged in parallel in the space of the seating portion along the swinging direction of the seating portion. The swing assist means,
The standing up assist device according to claim 5, wherein the seating portion is provided on the rear end side and the front end side, respectively. The locking means is
A lock bar provided on the inner side surface of the rear end portion of the upper plate,
An engagement member that is provided on the inner side surface of the rear end portion of the bottom plate and has an engagement groove that engages with the lock bar when the seat portion is closed,
A slide mechanism that slidably supports the engagement member in the front-rear direction of the seat portion,
A biasing means for locking, which biases the engaging member toward the rear end side of the seating portion,
Lock releasing means for releasing the engagement between the lock bar and the engaging groove of the engaging member by sliding the engaging member to the front end side of the seating portion,
The lock bar comes into contact with the engaging member when the upper surface plate is swung in the direction in which the seating portion is closed, and the engaging member is resisted against the locking biasing means to the front end side. 7. The standing up assist device according to claim 1, further comprising an inclined portion that slides to the bottom. The standing assistance device according to any one of claims 1 to 7, wherein the cylinder device is a gas spring. 8. The standing up assist device according to claim 5, wherein the link urging means of the swing assisting means is any one of a torsion spring, a mainspring spring, a leaf spring, and a coil spring. The standing assistance device according to any one of claims 1 to 9, wherein an upper limit of the thickness of the standing assistance device is 20 mm. Both ends are rotatably supported by a pair of rotary shafts provided on the inner side surfaces of the top plate and the bottom plate, which are swingably coupled and supported, and the piston rod is retracted to cause the top plate to move. An offset member used for a cylinder device for rocking, and connecting an end portion of the cylinder device in a projecting and retracting direction with the rotating shaft,
The offset member is
A through hole through which the rotating shaft passes,
And a connecting hole that is orthogonal to the through hole and connects the end of the cylinder device,
When the rotation shaft penetrates the through hole and the end of the cylinder device is connected to the connection hole, the rotation axis core of the rotation shaft and the piston rod that is orthogonal to the rotation axis center An offset member characterized in that it does not intersect with the axis on the same plane. The offset member according to claim 11, wherein the cylinder device is a gas spring.