JPH0310750Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is mainly used to help rheumatoid arthritis patients stand up from a sitting position on the floor or tatami mats, or stand up in the opposite direction. This invention relates to a medical chair that allows you to sit down from a sitting position.

(Conventional Chairs) This type of chair has existed in the past, for example, as disclosed in Japanese Utility Model Application Publication No. 133820/1982, but they are primarily intended for use in hospitals or Western-style rooms, and are suitable for use as sitting chairs or wheelchairs. It is customary to use it as a. For this reason, it cannot be used as a household chair for sitting on tatami mats or the floor, and it is especially inconvenient to use a kodatsu to warm your feet in the winter.

It is also conceivable to incorporate an elevating mechanism such as that disclosed in Japanese Utility Model Application Publication No. 59-147514, but the operation of the two types of elevating drive means is complicated.
Further, since there are difficulties in processing the tilting mechanism provided on the lower side of the seat, it is not necessarily easy to put it into practical use.

(Problems to be solved by the invention) This invention has the advantages of both conventional wheelchairs and seat chairs, and allows rheumatoid arthritis patients to stand up from a sitting position, or from a standing position to a sitting position. The object of the present invention is to provide a medical chair mainly for home use that allows one person to perform a series of operations easily and without pain.

(Means for Solving the Problem) That is, this invention includes a main body frame 24, a first cylinder 7 fixed upright to the main body frame 24, and a first piston inserted into the first cylinder 7 so as to be able to rise and fall freely. 7', and a second cylinder 8 which is inserted into the second cylinder 8 so as to be able to rise and fall freely.
A two-stage hydraulic cylinder 9 consisting of a piston 8' and an L whose upper end is attached to the second cylinder 8.
A letter-shaped seat arm 10 and the seat arm 10
a chair 3 consisting of a seat part 1 whose front end is pivotally connected to the front end of the chair; a backrest part 2 which is connected with a link 12 to the rear end of the seat part 1 so as to maintain the upright position at all times; It is pivotally attached to the tip of the abutment plate 18 that projects rearward of the seat arm 10, and
An operating rod 13 whose lower end is connected to the rear end of the seat 1 of the chair 3; and a rotary support rod 11 which connects the middle of the operating rod 13 to the upper end of the second piston 8'. As the first piston 7' moves up and down, the seat part 1 moves up and down between the vicinity of the floor and the height of the seat, and the up and down movement of the second piston 8' moves the seat part 1 to a horizontal position and the backrest part 2 to a predetermined position. The invention relates to a medical chair in which the stroke of each piston is determined to rotate between a forward tilted position and an obtuse angle of .

An embodiment of this invention will be described according to the drawings. Figure 1 is a side view of the seated chair, Figure 2 is an enlarged sectional view taken along the AA line, Figure 3 is an enlarged sectional view taken along the BB line, Figures 4 and 5 are side views of the link, and Figures 6 and 5 are FIG. 7 is a side view of the operating state.

The feature of this invention is that the chair 3 in a sitting state is powered by a two-stage hydraulic cylinder 9 that operates in two stages in the vertical direction.
is raised to form a seated chair, the backrest 2 is always regulated in an upright position, and only the seat 1 is tilted to push the entire chair forward and upward in a series of steps. The point is that it can be done.

First, the elevating means 4 for moving the chair up and down includes a first cylinder 7, a first piston 7' fitted into the first cylinder 7, and a seat arm connected to the tip of the first piston 7'. It consists of 10. The chair 3 is composed of a seat part 1 and a backrest part 2. The front end of the side rod 1' of the seat part 1 is pivotally attached to the front end a of the side rod 10' of the seat arm 10, and the rear end thereof is connected to the backrest part. 2 are connected by a link 12, which will be described later, so that they are always maintained in an upright state. When the chair 3 is at the sitting height as shown in FIG. 6, the rotating means 5 for rotating the rear end of the seat 1 upward and forward includes a second cylinder 8 which also serves as a first piston; It consists of a second piston 8' fitted into the second cylinder 8, a rotation support rod 11 and an operating rod 13 connected to the tip of the second piston 8'. This operating lever 1
The upper end of the seat arm 3 is pivotally connected to the tip of an abutment plate 18 that projects rearwardly of the seat arm 10, and the vicinity of the lower end thereof is connected to the vicinity of the rear end of the seat portion 1. The lower end of the rotary support rod 11 is pivotally mounted in the middle of the operating rod 13.

The push-out means 6 for pushing the chair forward and upward is comprised of the rotation means 5 and the link 12. The link 12 consists of a four-bar link as shown in FIG. 2, and a pin 29 protrudes from one side of the lower end of the first short link A. A nut 31 is passed through the holes drilled in ' and 2', and is screwed into the threaded portion 30 of the pin 29. With this, the backrest part 2 becomes the seat part 1.
It is pivoted to b and is also connected. Further, the other surface has an engaging protrusion 21, and the distal end of the engaging protrusion 21 has a threaded portion 32. The engagement protrusion 21 penetrates a sliding groove 20 formed in the longitudinal direction of the operating rod 13, and a nut 33 is screwed into the threaded portion 32.
The engagement protrusion 21 is slidable relative to the operating rod 13 and maintains the angle between the first short link A and the operating rod 13.

Next, the first connecting link B has the upper end of the first short link A pivoted on its right end, and its lower end pivoted on its left end in front of the mounting position b of the seat 1 of the first short link A. , the upper end of a second short link C having substantially the same length as the first short link A is pivotally connected to the first short link A;
The short link A and the second short link C are pivotally connected so as to be maintained substantially parallel to each other. Further, the second short link C of the first connecting link B is pivotally connected to one end of the second connecting link D, which is longer than the first connecting link B. The other end of the second connecting link D is pivoted below the backrest portion above the position of the pivot portion at the one end.

A connecting member 14 for connecting both ends of the seat arm 10 is fixed to the tip of the first piston 7',
Also, a rotation support rod 11 is provided at the tip of the second piston 8'.
The connecting member 15 that should connect the second
A spacer that can come into contact with the connecting member 14 is provided inside the piston 8'.

Reference numeral 16 in the drawings indicates a regulation for the first piston 7' and the second piston 8' to integrally move upward to a desired height (the height of this movement determines the height position of the seat). The nut is a member, and this nut screws on a threaded rod 17 that is fixed upright to the main body frame 24, so that the regulation height can be arbitrarily set. The threaded rod 17 penetrates into a through hole of a contact plate 18 fixed to the seat arm 10, and a nut 1 is screwed into an arbitrary position of the threaded rod 17.
A contact plate 18 is adapted to come into contact with the contact plate 6 . 1
Reference numeral 9 denotes a spring provided between a horizontal rod (not shown) connecting the contact plates 18, 18 on both sides and the upper end of the rotation support rod 11, which assists in lowering the seat portion 1.

22 is the armrest of the chair, which can be rotated in the direction shown by the chain line. Reference numeral 23 designates an operating switch for the hydraulic cylinder 9, which includes, in addition to a switch for raising and lowering operation, a switch for stopping the operation in the middle so that it can be used even in a seated chair state. 24 is the main body frame of the hydraulic cylinder 9, 25 is a lowering valve, 26
27 is a hydraulic pump unit, 27 is a hose, and 28 is a wheel.

The embodiment of this invention is as described above, and the operation will now be explained with reference to the drawings.

Figure 6 shows the first piston 7' (second cylinder 8)
FIG. 7 shows a state in which only the second piston 8' has moved upward from the state shown in FIG. 6.

In order for the patient to stand up from the seated position shown in FIG. The two pistons 8' move together until the contact plate 18 contacts the nut 16, and the chair 3 rises to the position shown in FIG.
In this state, the patient's feet are able to land on the ground, allowing the patient to experience the first step in standing up and gain stability. Thereafter, only the second piston 8' rises until it comes into contact with the connecting member 14 provided on the first piston 7', and the rotation support rod 11 also moves in conjunction with this, but due to the rising operation of the rotation support rod 11. Therefore, the operating rod 13 rotates clockwise about point c as a fulcrum.

While only the second piston 8' is rising, the engagement protrusion 21 inserted into the sliding groove 20 is pressed counterclockwise about point a, so that the rear part of the seat is lifted forward and upward. While being rotated, the seat portion 1 is tilted forward downward as shown in FIG. On the other hand, by the action of the link mechanism 12, the backrest part 2 is pushed forward in an upright state substantially in its original state without falling down in the front-rear direction during or after the seat part 1 is tilted.

Therefore, in the chair of this invention, the patient's feet first touch the floor or the ground at the time shown in Figure 4, so he can feel the stability of his body with his feet, and it is possible to prepare for standing up. From Figure 6 to Figure 7, the patient's buttocks and back are pushed forward and upward by the joints between the seat part 1 and the backrest part 2, so the patient's weight when standing up from a sitting position is gradually applied to the patient's legs. make it possible. During these series of motions, the posture of the chair changes gradually for the patient, so there is no sudden load on the patient's legs.During the above series of motions, the armrests are kept in a nearly horizontal position, so the patient's weight is reduced. can be supported by the arms, the user does not have to take an unreasonable posture during the change, and getting up from a sitting position can be done extremely easily, quickly, and painlessly.

After standing up from the seat 1, if you operate the switch to lower the seat 1, the compressive force of the spring 19 will also act and the chair 3 will return to the state shown in FIG. It is also possible to create a sitting chair in the state shown in FIG. 6 by switching.

[Brief explanation of the drawing]

Figure 1 is a side view showing the seated state of the chair of the present invention, Figure 2 is an enlarged sectional view taken along the line AA in Figure 1, Figure 3 is an enlarged sectional view taken along the line BB in Figure 2, Figures 4 and 5. The figure is a side view of the link mechanism, and FIGS. 6 and 7 are side views showing the operating state of the chair. 1... Seat part, 2... Backrest part, 3... Chair,
7...First cylinder, 7'...First piston, 8
...Second cylinder, 8'...Second piston, 9...
... Two-stage hydraulic cylinder, 10 ... Seat arm, 1
DESCRIPTION OF SYMBOLS 1... Rotation support rod, 12... Link, 13... Operation rod, 16... Adjustment stopper, 18... Contact plate, 24... Main body frame, 21... Engaging protrusion, A
...First short link, B...First connecting link, C...
...Second short link, D...Second connecting link.

Claims (1)

[Claims for Utility Model Registration] 1. (A) a main body frame, (B) a first cylinder fixed upright to the main body frame, and a first piston inserted into the first cylinder so as to be able to rise and fall freely. a second cylinder and the second cylinder;
a two-stage hydraulic cylinder consisting of a second piston inserted into the cylinder so as to be able to rise and fall; (C) an L-shaped seat arm whose upper end is attached to the second cylinder; (D) a front end of the seat arm. (E) a chair comprising a seat portion whose front end is pivotally connected to the seat arm; and a backrest portion which is linked to the rear end of the seat portion so as to maintain an upright position at all times; (F) an operating lever that is pivotally connected to the tip of the abutment plate that protrudes from the rear end thereof, and whose lower end is connected to the rear end of the seat of the chair; (F) between the operating lever and the second piston; (G) When the first piston moves up and down, the seat moves up and down between the floor and the height of the seat, and when the second piston moves up and down, the seat moves horizontally. A medical chair in which the stroke of each piston is determined to rotate between a position and a forwardly tilted position forming a predetermined obtuse angle with a backrest portion. 2. The medical chair according to claim 1, which is provided with an adjustment stopper for adjusting the rising end of the seat arm. 3. One end of the first short link is pivotally connected to the connecting portion between the seat and the backrest, and the engagement protrusion of the first short link and the lower part of the operating lever are slidable in the axial direction of the operating lever. and a lower end of a second short link having substantially the same length as the first short link is pivotally connected to a position in front of the rear end of the seat. , a first connecting link that maintains the two short links substantially parallel is connected to the free ends of the first and second short links; The medical chair according to claim 1, wherein a second connecting link, which is longer than the first connecting link, is connected to the position of the medical chair.