JPS6216652B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a chair for disabled persons that assists disabled persons in standing up and sitting down.

[Prior art and problems to be solved by the invention]

Today, there are people with disabilities who have physical disabilities congenitally or acquired for some reason.
BACKGROUND ART Research and development of various types of equipment for the disabled, such as automatic devices such as wheelchairs and assistive devices, are being actively conducted and are becoming widely used. However, although the lifestyle in Japan has adopted many chair-based lifestyles like in Europe and America, the so-called sedentary lifestyle is still the main one, which is based on sitting on tatami mats. Equipment for disabled people, such as wheelchairs, cannot be used as they are in a lifestyle where people sit on tatami mats, and in such cases, they have to get off the wheelchair and sit on a chair or the like. However, in this case, the disabled person finds it extremely difficult to sit down on a chair, get up from the chair and transfer to a wheelchair, and must receive help from an attendant. It was impossible. In addition, for elderly people who have weakened legs and knees, it is difficult and tedious to get up or sit down, and the situation is such that they end up sedentary. Therefore, a chair in which the seat part of the person sits can freely change from a low sitting position to a high sitting position has been proposed, but this one does not have a ratchet mechanism that allows the seat part to change its shape. Since this was done using mechanical means such as gear mechanisms, the transformation operation was troublesome and complicated, and it was almost impossible for disabled people to operate it on their own. This has caused problems as it cannot be stopped sequentially.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a seat chair for people with disabilities that can eliminate these drawbacks. A telescoping cylinder is interlocked with the seat transformation mechanism that enables free transformation between a sitting posture and a low sitting posture, and the transformation movement of the seat is performed by the expansion and contraction operation of the cylinder. The cylinder is configured as follows:
The device is characterized by being set to have a pushing force that pushes up the seat toward the sitting position with a force that is approximately balanced with the weight of the person sitting on the seat when the valve is opened. .

With this configuration, the present invention allows the seat to freely change its shape between a low sitting posture and a high sitting posture. By balancing the weight of the person sitting on the seat with the force of the cylinder to push up the seat, even a person with a pre-existing disability can do it very easily and easily.

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings. In the drawings, reference numeral 1 denotes a seat chair for people with disabilities, and the seat chair 1 is assembled using a frame body mainly made of a cylindrical body, and a parallel link mechanism is formed on the base frame 2. Lower end portions of the left and right front and rear link rods 3, 4 are swingably supported via support shafts 3a, 4a. At the upper ends of the link rods 3 and 4, a seat part 6 formed into a framework on which a cushion 5 is placed is pivotally supported via support shafts 3b and 4b. Axis 3
Using a and 4a as fulcrums, the link rods 3 and 4 can freely move up and down in parallel from a low sitting position lying down in a substantially horizontal direction that coincides with the base frame 2, to a high sitting position standing up backwards and upwards. and
In this way, the seat portion changing mechanism is configured. 7
is an armrest frame that stands on both left and right sides of the base frame 2 so as to sandwich the seat part 6 in a loosely fitted manner, and a reinforcing frame 8 is provided between the rear parts of the armrest frame 7. The support has been reinforced.

On the other hand, substantially shaped auxiliary frames 9 are integrally fixed to the left and right rear link rods 4. A pair of left and right cylinders 10 are interposed between this auxiliary frame 9 and the auxiliary frame 8, respectively. This cylinder 10 is formed by filling the interior with compressed gas, and as will be described later, when the valve 11 is pushed into the open state using the operating lever 12, the force of the compressed gas acts. This extension force, that is, the pushing force, is set to be approximately balanced with the weight of the person using the seat chair for persons with disabilities. There is. The operating lever 12 has a base end pivotably connected to a bracket 13 provided on the reinforcing frame 8, and a middle part abutting the valve 11, but a tip end. The tip of the operating link 14 is pivotally connected. 15 is a case body integrally fixed to the bracket 13;
The base end side of the actuating link 14 is internally slidably slidable up and down. The base end of the actuation link 14 has a substantially inverted T-shape, and an actuation wire 16 is connected to both left and right ends thereof. On the other hand, the other end of the actuation wire 16 is connected to operating levers 17 and 18 provided on the lower armrest 7a and upper armrest 7b of the armrest frame 7, respectively, so that either operating lever 17 or 18 can be operated. By gripping and tightening the inner wire and pulling the inner wire, the operating link 14 moves downward, which causes the left and right operating levers 12 to swing downward using the base end as a fulcrum, forcing the valve 11 to open. By setting the cylinder 10 in this state, the cylinder 10 is expanded by the pushing up force.

Reference numeral 19 denotes a lock lever provided on the base frame 2, and the lock lever 19 is integrally fixed to a lock pin 20 inserted into the case body 20a so as to be freely retractable. Therefore, the lock hole 2 provided in the seat portion 6
1 and is constantly biased toward the lock side that restricts the upward movement of the seat portion 6. Then, the lock lever 19 is rotated from the lock position where it stands upright in a crosswise manner with respect to the base frame 2 to the lock release position where it is parallel to the base frame 2, so that the curved portion 19a at the tip comes into contact with the base frame 2, so that the lock lever 19 coil bullet machine 20b
The lock pin is automatically moved to the side where it comes out of the lock hole 21 against the force, and the lock is released.

In the figure, 22 is a grip frame for the caregiver provided at the upper end of the seat, and 23 is the auxiliary frame 9 and the seat 6.
This is a reinforcing frame supported between the

In the embodiment of the present invention constructed as described above, when a disabled person who is sitting on the seat 1 takes a seated position, he or she can easily move the seat 6 along with the seat 6 by tightening the control lever 17. , and can reliably assume a sitting posture. That is, by tightening the operating lever 17 to move the operating link 14 downward and pushing the valve 11 into the open state, the cylinder 10 attempts to push the seat 6 toward the sitting position. Since the pushing force of the cylinder 10 and the weight of the disabled person are approximately balanced, the seat 6 is maintained in the same state and there is no fear that it will be suddenly lifted. In this state, by lightly pushing the armrest frame 7 downward, the person with a disability can move up and down extremely smoothly together with the seat 6 and move to a high sitting position. become. In this way, the disabled person can remain seated on the seat 6 and be in a sitting position, and can stand up from that position or transfer to a wheelchair. Conversely, in order to get into a low sitting position, a disabled person sitting on the seat 6 in a sitting position should move the operating lever 6.
If the armrest frame 7 is slightly pulled up while gripping the armrest frame 7, the cylinder 10 will contract against the lifting force, and the seat 6 will descend toward a lower sitting position. Become.
Furthermore, if you want to stop the seat part 6 midway, when the seat part 6 reaches the position you want to stop, press the operating lever 1.
When 7 is released, the valve 11 automatically returns to the closed state due to its restoring force, and further expansion and contraction of the cylinder 10 is stopped, and the seat 6 remains in the intermediate position. Become. In addition, when a caretaker performs the movement, the seat portion 6 can be transformed in the same manner by opening the valve 11 by operating the upper operating lever 18.

As described above, in the present invention, the seat portion 6 can be freely moved to any position between a high sitting posture and a low sitting posture.
The drive source that transforms the seat 6 is not mechanical, such as the conventional ratchet gear type, but is driven by the pushing force of a cylinder 10 filled with compressed gas. The push-up force suitable for the posture is set to approximately balance the weight of the person with a disability, so the seat 6
Even if the valve 11 is opened, the two forces are balanced so that it hardly moves up or down and is maintained in that position.Next, when the seat 6 is pushed or pulled lightly on the armrest frame 7. It is possible to change the shape up and down with a very simple and simple operation, and the change of shape of the seat part 6 can be done not only extremely easily and quickly, but also with a small amount of force. It can be operated by a person with a disability alone, making it extremely useful as a seat for a person with a disability.

Moreover, in this embodiment, the auxiliary frame 9 to which one end of the cylinder 10 is attached protrudes rearward and can be used as a stepping frame for the caregiver, so that the caregiver can easily change the shape of the seat 6. In the case where this is done, it is possible to significantly improve the work efficiency of the attendant. Moreover, in this case,
Since the auxiliary frame 9 to which the cylinder 10 is attached is also used as a foot frame, the structure can be greatly simplified and the shape can be made simple.
This is convenient because it allows the omission of members. Furthermore, two sets of operating levers are provided, one for the disabled and one for the attendant, which is convenient.
Furthermore, since the seat part 6 is adapted to change from a sitting position to a seated position by moving rearward and upward, there is an advantage that, for example, it is easier to enter and exit the kotatsu.

Furthermore, in this embodiment, if the disabled person accidentally operates the operating lever 17 or 18 when the disabled person is not sitting in a low sitting position, the push-up force of the cylinder 10 will cause the disabled person to sit down. There is a risk that the lock lever 19 may move upward suddenly.
By locking the seat 6 in this sitting position, it is possible to prevent the seat 6 from moving upward unexpectedly, resulting in extremely high safety. Moreover, when the lock lever 19 is raised and lowered from the lock position to the unlock position, the curved portion 19a at the tip of the lever comes into contact with the base frame 2, and the lock lever 19 automatically comes out of the lock hole 21 and is unlocked. Although it is an extremely simple locking mechanism, it is possible to perform a lock release operation using the base frame 2, which is convenient because it improves operability and simplifies the structure. . Furthermore, since the valve 11 of the cylinder 10 is configured to be pushed into the open state by the principle of leverage in the operating lever 12, the operation by the operating levers 17 and 18 is also reduced. Furthermore, in this embodiment, the actuating levers 14 for actuating the actuating levers 12 are substantially V-shaped, which is even more convenient. Moreover,
In this embodiment, rollers may be attached to the base frame 2 so that the seat can be moved together with the seat. In addition, it is preferable for safety that the roller be equipped with a stopper.

It should be noted that the present invention is of course not limited to the above-mentioned embodiments, and the point is that the seat on which a person sits can be freely changed between a high sitting posture and a low sitting posture. A telescoping cylinder is interlocked and connected to the seat shape changing mechanism, and the shape of the seat shape is changed by the expansion and contraction operation of the cylinder. Any means is acceptable as long as the seat is set to have a force that pushes up the seat toward the sitting position with a force approximately proportional to the weight of the person sitting on the seat. The weight of the cylinder and the pushing force of the cylinder do not necessarily have to match perfectly. For example, by setting the pushing force of the cylinder every 5 kg, it can be used with almost no problems, and it is also possible to There is no problem even if it fluctuates a little, taking into consideration the rotational resistance at the branch, the weight of the seat, etc.

[Effect]

In summary, since the present invention is constructed as described above, the seat can be freely changed between a low sitting posture and a high sitting posture, thereby facilitating the sitting up movement of a disabled person. However, the changing movement of the seat is not done mechanically using a ratchet gear or the like as in the past, but by the expansion and contraction of a cylinder that is interlocked with the seat changing mechanism. Moreover, this cylinder is set up so that it can push up the seat with a force that is approximately equal to the weight of the person sitting on the seat, so once the valve is opened, the rest is extremely small. By pushing and pulling the seat up and down with a light force, the seat can move up and down smoothly and freely change its shape between a high sitting position and a low sitting position. It can be used as a seat for people with disabilities.

[Brief explanation of the drawing]

The drawings show an embodiment of the chair for people with disabilities according to the present invention, in which Figure 1 is an overall side view of the chair, Figure 2 is an overall rear view of the chair, and Figure 3 is an overall back view of the chair. The figure is an explanatory view of the operation seen from the side, and FIG. 4 is a cross-sectional view of the lock mechanism. In the figure, 1 is a seat, 6 is a seat, 10 is a cylinder, and 11 is a valve.

Claims (1)

[Claims] 1. A telescopic cylinder is interlocked with the seat transformation mechanism that enables the seat where a person sits to freely change its shape between a high sitting position and a low sitting position, allowing the seat to change its shape and move. is configured to be performed by the expansion and contraction operation of the cylinder, and the cylinder is configured to:
For persons with disabilities, the device is configured to have a pushing force that pushes up the seat toward a sitting position with a force approximately balanced with the weight of the person sitting on the seat when the valve is opened. Chair.